diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md index da12dddf1f..8ad33153d2 100644 --- a/.github/PULL_REQUEST_TEMPLATE.md +++ b/.github/PULL_REQUEST_TEMPLATE.md @@ -9,7 +9,6 @@ If not all TODOs are marked, this PR is considered WIP (work in progress) - [ ] Have **tests** been written for the new code? If you're fixing a bug, write a regression test (or have a really good reason for not writing one... and I mean **really** good!) - [ ] Has documentation been written/updated? - [ ] New dependencies (if any) added to requirements file -- [ ] Add an entry to CHANGELOG.rst ## Reviewer guidance diff --git a/.gitignore b/.gitignore index e68a4576cf..137bcb30c0 100644 --- a/.gitignore +++ b/.gitignore @@ -33,6 +33,9 @@ static-updates # MAC stuff .DS_Store +# oh-my-zsh +.venv + # SQLite files (should probably specify the path) *.db *.sqlite* @@ -41,6 +44,7 @@ static-updates *.patch *.pid *.prof +secretkey.txt # Python compiling *.pyc @@ -59,7 +63,6 @@ static-updates # Documentation docs/_build docs/images/* -docs/kalite.1.gz # oh-my-zsh convention for automatically # switching on a venv @@ -72,6 +75,9 @@ venv/ # Ignore changes to Perseus and Khan Exercises that do not come from intentional edits /kalite/distributed/static/js/distributed/perseus +# Ignore file used to store queued video download info. +videos_to_download.json + # Lacks documentation locale/ node_modules/ diff --git a/MANIFEST.in.dist b/MANIFEST.in.dist index 811c9b900c..d5301d9838 100644 --- a/MANIFEST.in.dist +++ b/MANIFEST.in.dist @@ -9,20 +9,23 @@ include requirements.txt recursive-include kalite *.html *.txt *.png *.js *.css *.gif *.less *.otf *.svg *.woff *.eot *.ttf *.zip *.json *.handlebars +# Get the empty DBs -- make sure they are properly generated! +recursive-exclude kalite/database * +recursive-include kalite/database/templates *sqlite +recursive-include kalite/database/templates/content_items *sqlite + # This can be a huge problem when creating an sdist from # a local development environment recursive-exclude kalite/static * -# Not doing this anymore -# exclude kalite/local_settings.py -# exclude kalite/settings/local_settings.py -# exclude kalite/private_key.pem -# exclude kalite/secrets.py - # Data files, these are not picked up by sdist unless listed here recursive-include python-packages * recursive-include static-libraries * + +# There are still a couple of files left here, however main part is for build +# process recursive-include data * +recursive-exclude data/khan * # Necessary because it's a data directory so they # do not get automatically excluded @@ -30,3 +33,5 @@ recursive-exclude python-packages *pyc # Docs recursive-include docs/_build/html * +include docs/kalite.1.gz + diff --git a/Makefile b/Makefile index 0b020362df..b0a1f78f41 100644 --- a/Makefile +++ b/Makefile @@ -12,18 +12,25 @@ help: @echo "assets - build all JS/CSS assets" @echo "coverage - check code coverage quickly with the default Python" @echo "docs - generate Sphinx HTML documentation, including API docs" - @echo "release - package and upload a release" - @echo "dist - package locally" + @echo "release - package and upload a release, options: format=[gztar,zip]" + @echo "dist - package locally, options: format=[gztar,zip]" @echo "install - install the package to the active Python's site-packages" +# used for release and dist targets +format?=gztar + clean: clean-build clean-pyc clean-test +clean-dev-db: + rm -f kalite/database/data.sqlite + clean-build: rm -fr build/ rm -fr dist/ rm -fr .eggs/ rm -fr dist-packages/ rm -fr dist-packages-temp/ + rm -fr kalite/database/templates find . -name '*.egg-info' -exec rm -fr {} + find . -name '*.egg' -exec rm -f {} + @@ -45,7 +52,7 @@ lint: test: bin/kalite manage test --bdd-only -test-bdd: +test-bdd: docs bin/kalite manage test --bdd-only test-nobdd: @@ -73,24 +80,33 @@ docs: # sphinx-apidoc -o docs/ ka-lite-gtk $(MAKE) -C docs clean $(MAKE) -C docs html - cli2man bin/kalite -o docs/kalite.1.gz # open docs/_build/html/index.html + +# Runs separately from the docs command for now because of Windows issues +man: + cli2man bin/kalite -o docs/kalite.1.gz + assets: # Necessary because NPM may have wrong versions in the cache npm cache clean npm install --production node build.js bin/kalite manage compileymltojson + bin/kalite manage syncdb --noinput + bin/kalite manage migrate + mkdir -p kalite/database/templates/ + cp kalite/database/data.sqlite kalite/database/templates/ + bin/kalite manage retrievecontentpack download en --minimal --foreground --template -release: clean docs assets - python setup.py sdist --formats=gztar,zip upload --sign - python setup.py sdist --formats=gztar,zip upload --sign --static +release: dist man ls -l dist + echo "uploading above to PyPi, using twine" + twine upload -s dist/* -dist: clean docs assets - python setup.py sdist - python setup.py sdist --static +dist: clean clean-dev-db docs assets + python setup.py sdist --formats=$(format) + python setup.py sdist --formats=$(format) --static ls -l dist install: clean diff --git a/circle.yml b/circle.yml index aeb73234ec..6588cb8970 100644 --- a/circle.yml +++ b/circle.yml @@ -4,10 +4,11 @@ machine: dependencies: cache_directories: + - "content" - "data" - "sc-latest-linux" override: - - pip install -r requirements_test.txt + - pip install -r requirements_sphinx.txt - pip install -e . # This cannot be done because pip on Circle doesn't understand our sdist # - make sdist @@ -18,7 +19,7 @@ dependencies: test: override: - make assets - - kalite start --settings=kalite.project.settings.disk_based_cache --traceback -v2 + - kalite start --traceback -v2 - kalite status - kalite stop --traceback -v2 - cd sc-*-linux && ./bin/sc -u $SAUCE_USERNAME -k $SAUCE_ACCESS_KEY --tunnel-identifier $CIRCLE_BUILD_NUM-$CIRCLE_NODE_INDEX --readyfile ~/sauce_is_ready > sc_output.txt 2>&1: @@ -26,7 +27,7 @@ test: - while [ ! -e ~/sauce_is_ready ]; do sleep 1; done - case $CIRCLE_NODE_INDEX in 0) make test-bdd ;; 1) make test-nobdd;; esac: parallel: true - # TODO: replace below with "make link" when we're pep8 + # TODO: replace below with "make lint" when we're pep8 - npm install -g jshint - jshint kalite/*/static/js/*/ post: diff --git a/data/khan/channel_data.json b/data/khan/channel_data.json deleted file mode 100644 index a6eb028daa..0000000000 --- a/data/khan/channel_data.json +++ /dev/null @@ -1,7 +0,0 @@ -{ - "channel_name": "KA Lite", - "head_line": "A free world-class education for anyone anywhere.", - "tag_line": "KA Lite is a light-weight web server for viewing and interacting with core Khan Academy content (videos and exercises) without needing an Internet connection.", - "channel_license": "CC-BY-NC-SA", - "footer_text": "Videos © 2015 Khan Academy (Creative Commons) // Exercises © 2015 Khan Academy" -} diff --git a/data/khan/contents.json b/data/khan/contents.json deleted file mode 100644 index 8197e5f992..0000000000 --- a/data/khan/contents.json +++ /dev/null @@ -1 +0,0 @@ -{"C-2Ln0pK3kY": {"duration": 595, "path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/algebra-ii-imaginary-and-complex-numbers/", "keywords": "algebra, complex, imaginary", "id": "C-2Ln0pK3kY", "title": "Algebra II: Imaginary and complex numbers", "description": "21-26, mostly imaginary and complex numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C-2Ln0pK3kY.mp4/C-2Ln0pK3kY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C-2Ln0pK3kY.mp4/C-2Ln0pK3kY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C-2Ln0pK3kY.m3u8/C-2Ln0pK3kY.m3u8"}, "slug": "algebra-ii-imaginary-and-complex-numbers", "video_id": "C-2Ln0pK3kY", "youtube_id": "C-2Ln0pK3kY", "readable_id": "algebra-ii-imaginary-and-complex-numbers"}, "ER49EweKwW8": {"duration": 699, "path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/endocrine-gland-hormone-review/", "keywords": "endocrine, gland, hormone", "id": "ER49EweKwW8", "title": "Endocrine gland hormone review", "description": "Welcome to the Endocrine System. Get ready to learn about one of the most important ways that our body parts communicate! By Ryan Patton.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ER49EweKwW8.mp4/ER49EweKwW8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ER49EweKwW8.mp4/ER49EweKwW8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ER49EweKwW8.m3u8/ER49EweKwW8.m3u8"}, "slug": "endocrine-gland-hormone-review", "video_id": "ER49EweKwW8", "youtube_id": "ER49EweKwW8", "readable_id": "endocrine-gland-hormone-review"}, "TEfyIsDRGCk": {"duration": 259, "path": "khan/economics-finance-domain/core-finance/derivative-securities/cdo-tutorial/collateralized-debt-obligation-overview/", "keywords": "credit, crisis, ratings, agency", "id": "TEfyIsDRGCk", "title": "Collateralized debt obligation overview", "description": "How CDOs can give different investors different levels of risk and returns with the same underlying assets", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TEfyIsDRGCk.mp4/TEfyIsDRGCk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TEfyIsDRGCk.mp4/TEfyIsDRGCk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TEfyIsDRGCk.m3u8/TEfyIsDRGCk.m3u8"}, "slug": "collateralized-debt-obligation-overview", "video_id": "TEfyIsDRGCk", "youtube_id": "TEfyIsDRGCk", "readable_id": "collateralized-debt-obligation-overview"}, "v-Drg73XrS4": {"duration": 278, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/standard-cell-potential-and-the-equilibrium-constant-edited/", "keywords": "", "id": "v-Drg73XrS4", "title": "Standard cell potential and the equilibrium constant", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v-Drg73XrS4.mp4/v-Drg73XrS4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v-Drg73XrS4.mp4/v-Drg73XrS4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v-Drg73XrS4.m3u8/v-Drg73XrS4.m3u8"}, "slug": "standard-cell-potential-and-the-equilibrium-constant-edited", "video_id": "v-Drg73XrS4", "youtube_id": "v-Drg73XrS4", "readable_id": "standard-cell-potential-and-the-equilibrium-constant-edited"}, "GW8ZPjGlk24": {"duration": 1190, "path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/lin-alg-visualizations-of-left-nullspace-and-rowspace/", "keywords": "rowspace, left, nullspace", "id": "GW8ZPjGlk24", "title": "Visualizations of left nullspace and rowspace", "description": "Relationship between left nullspace, rowspace, column space and nullspace.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GW8ZPjGlk24.mp4/GW8ZPjGlk24.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GW8ZPjGlk24.mp4/GW8ZPjGlk24.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GW8ZPjGlk24.m3u8/GW8ZPjGlk24.m3u8"}, "slug": "lin-alg-visualizations-of-left-nullspace-and-rowspace", "video_id": "GW8ZPjGlk24", "youtube_id": "GW8ZPjGlk24", "readable_id": "lin-alg-visualizations-of-left-nullspace-and-rowspace"}, "ouAFk0Jy6TY": {"duration": 194, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-numbers-pre-alg/fractions-cut-and-copy-2-exercise-example/", "keywords": "", "id": "ouAFk0Jy6TY", "title": "Fractions cut and copy 2 exercise example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ouAFk0Jy6TY.mp4/ouAFk0Jy6TY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ouAFk0Jy6TY.mp4/ouAFk0Jy6TY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ouAFk0Jy6TY.m3u8/ouAFk0Jy6TY.m3u8"}, "slug": "fractions-cut-and-copy-2-exercise-example", "video_id": "ouAFk0Jy6TY", "youtube_id": "ouAFk0Jy6TY", "readable_id": "fractions-cut-and-copy-2-exercise-example"}, "yyM0yIOJ2yE": {"duration": 468, "path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/extranuclear-inheritance-1/", "keywords": "", "id": "yyM0yIOJ2yE", "title": "Extranuclear inheritance 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yyM0yIOJ2yE.mp4/yyM0yIOJ2yE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yyM0yIOJ2yE.mp4/yyM0yIOJ2yE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yyM0yIOJ2yE.m3u8/yyM0yIOJ2yE.m3u8"}, "slug": "extranuclear-inheritance-1", "video_id": "yyM0yIOJ2yE", "youtube_id": "yyM0yIOJ2yE", "readable_id": "extranuclear-inheritance-1"}, "MNUVuZu6heA": {"duration": 288, "path": "khan/economics-finance-domain/core-finance/derivative-securities/credit-default-swaps-tut/financial-weapons-of-mass-destruction/", "keywords": "finance, cds", "id": "MNUVuZu6heA", "title": "Financial weapons of mass destruction", "description": "Why Warren Buffett called Credit Default Swaps financial weapons of mass destruction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MNUVuZu6heA.mp4/MNUVuZu6heA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MNUVuZu6heA.mp4/MNUVuZu6heA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MNUVuZu6heA.m3u8/MNUVuZu6heA.m3u8"}, "slug": "financial-weapons-of-mass-destruction", "video_id": "MNUVuZu6heA", "youtube_id": "MNUVuZu6heA", "readable_id": "financial-weapons-of-mass-destruction"}, "W2NnNKtquaE": {"duration": 279, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/geometric-sequence/", "keywords": "", "id": "W2NnNKtquaE", "title": "Geometric sequence or progression", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W2NnNKtquaE.mp4/W2NnNKtquaE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W2NnNKtquaE.mp4/W2NnNKtquaE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W2NnNKtquaE.m3u8/W2NnNKtquaE.m3u8"}, "slug": "geometric-sequence", "video_id": "W2NnNKtquaE", "youtube_id": "W2NnNKtquaE", "readable_id": "geometric-sequence"}, "P6PEf9WtEvs": {"duration": 197, "path": "khan/test-prep/mcat/behavior/theories-personality/maslow-hierarchy-of-needs/", "keywords": "needs, maslow", "id": "P6PEf9WtEvs", "title": "Maslow's hierarchy of needs", "description": "Abraham Maslow's Hierarchy of Needs is a basic psychology concept in understanding the Humanistic approach to personality and behaviors. By Shreena Desai.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P6PEf9WtEvs.mp4/P6PEf9WtEvs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P6PEf9WtEvs.mp4/P6PEf9WtEvs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P6PEf9WtEvs.m3u8/P6PEf9WtEvs.m3u8"}, "slug": "maslow-hierarchy-of-needs", "video_id": "P6PEf9WtEvs", "youtube_id": "P6PEf9WtEvs", "readable_id": "maslow-hierarchy-of-needs"}, "we6uSVf4qss": {"duration": 815, "path": "khan/partner-content/wi-phi/metaphys-epistemology/gricean-pragmatics/", "keywords": "", "id": "we6uSVf4qss", "title": "Language: Gricean Pragmatics", "description": "Karen explores the relationship between language and communication, looking at the question of how it is that people regularly use words to communicate more than their literal meanings.\u00a0 This video introduces us to the most philosophically influential theory on this matter, H.P. Grice\u2019s theory of pragmatics.\n\nSpeaker: Dr. Karen Lewis, Barnard College, Columbia University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/we6uSVf4qss.mp4/we6uSVf4qss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/we6uSVf4qss.mp4/we6uSVf4qss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/we6uSVf4qss.m3u8/we6uSVf4qss.m3u8"}, "slug": "gricean-pragmatics", "video_id": "we6uSVf4qss", "youtube_id": "we6uSVf4qss", "readable_id": "gricean-pragmatics"}, "PywR3Pn7ZlU": {"duration": 275, "path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/ad-reinhardt-abstract-painting-1963/", "keywords": "", "id": "PywR3Pn7ZlU", "title": "Ad Reinhardt, Abstract Painting", "description": "Ad Reinhardt, Abstract Painting, 1963, oil on canvas, 60 x 60 inches (The Museum of Modern Art) Speakers: Salman Khan & Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PywR3Pn7ZlU.mp4/PywR3Pn7ZlU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PywR3Pn7ZlU.mp4/PywR3Pn7ZlU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PywR3Pn7ZlU.m3u8/PywR3Pn7ZlU.m3u8"}, "slug": "ad-reinhardt-abstract-painting-1963", "video_id": "PywR3Pn7ZlU", "youtube_id": "PywR3Pn7ZlU", "readable_id": "ad-reinhardt-abstract-painting-1963"}, "Osl6HEDZZ-E": {"duration": 303, "path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/ideal-gas-example-4/", "keywords": "molar, mass, ideal, gas, equation", "id": "Osl6HEDZZ-E", "title": "Ideal gas equation example 4", "description": "Figuring out the molar mass of a mystery molecule at STP.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Osl6HEDZZ-E.mp4/Osl6HEDZZ-E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Osl6HEDZZ-E.mp4/Osl6HEDZZ-E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Osl6HEDZZ-E.m3u8/Osl6HEDZZ-E.m3u8"}, "slug": "ideal-gas-example-4", "video_id": "Osl6HEDZZ-E", "youtube_id": "Osl6HEDZZ-E", "readable_id": "ideal-gas-example-4"}, "WNuIhXo39_k": {"duration": 550, "path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/vector-dot-product-and-vector-length/", "keywords": "vector, dot, product, length", "id": "WNuIhXo39_k", "title": "Vector dot product and vector length", "description": "Definitions of the vector dot product and vector length", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WNuIhXo39_k.mp4/WNuIhXo39_k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WNuIhXo39_k.mp4/WNuIhXo39_k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WNuIhXo39_k.m3u8/WNuIhXo39_k.m3u8"}, "slug": "vector-dot-product-and-vector-length", "video_id": "WNuIhXo39_k", "youtube_id": "WNuIhXo39_k", "readable_id": "vector-dot-product-and-vector-length"}, "TbaltFbJ3wE": {"duration": 138, "path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/scalar-multiplication/", "keywords": "", "id": "TbaltFbJ3wE", "title": "Scalar multiplication", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TbaltFbJ3wE.mp4/TbaltFbJ3wE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TbaltFbJ3wE.mp4/TbaltFbJ3wE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TbaltFbJ3wE.m3u8/TbaltFbJ3wE.m3u8"}, "slug": "scalar-multiplication", "video_id": "TbaltFbJ3wE", "youtube_id": "TbaltFbJ3wE", "readable_id": "scalar-multiplication"}, "CGrbnripinU": {"duration": 634, "path": "khan/science/health-and-medicine/healthcare-misc/colon-dysplasia/", "keywords": "medicine, pahtology, cancer, histology, colon", "id": "CGrbnripinU", "title": "Colon dysplasia", "description": "Dr. Andy Connolly shows Sal what cancerous colon tissue looks like", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CGrbnripinU.mp4/CGrbnripinU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CGrbnripinU.mp4/CGrbnripinU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CGrbnripinU.m3u8/CGrbnripinU.m3u8"}, "slug": "colon-dysplasia", "video_id": "CGrbnripinU", "youtube_id": "CGrbnripinU", "readable_id": "colon-dysplasia"}, "-IDmLERenrU": {"duration": 572, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/shorting-stock/shorting-stock/", "keywords": "finance, short, sale, stock, market", "id": "-IDmLERenrU", "title": "Shorting stock", "description": "What does it mean to short a stock?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-IDmLERenrU.mp4/-IDmLERenrU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-IDmLERenrU.mp4/-IDmLERenrU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-IDmLERenrU.m3u8/-IDmLERenrU.m3u8"}, "slug": "shorting-stock", "video_id": "-IDmLERenrU", "youtube_id": "-IDmLERenrU", "readable_id": "shorting-stock"}, "z45UEiPaE8c": {"duration": 203, "path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/recognizing-functions-example-5/", "keywords": "", "id": "z45UEiPaE8c", "title": "How to check if a relationship between real-world quantities described verbally represents a function (example)", "description": "Sal checks whether a description of the price of an order can be represented as a function of the shipping cost.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z45UEiPaE8c.mp4/z45UEiPaE8c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z45UEiPaE8c.mp4/z45UEiPaE8c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z45UEiPaE8c.m3u8/z45UEiPaE8c.m3u8"}, "slug": "recognizing-functions-example-5", "video_id": "z45UEiPaE8c", "youtube_id": "z45UEiPaE8c", "readable_id": "recognizing-functions-example-5"}, "QkepM8Vv3kw": {"duration": 805, "path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-algebra-another-least-squares-example/", "keywords": "least, squares, approximation, solution", "id": "QkepM8Vv3kw", "title": "Another least squares example", "description": "Using least squares approximation to fit a line to points", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QkepM8Vv3kw.mp4/QkepM8Vv3kw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QkepM8Vv3kw.mp4/QkepM8Vv3kw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QkepM8Vv3kw.m3u8/QkepM8Vv3kw.m3u8"}, "slug": "linear-algebra-another-least-squares-example", "video_id": "QkepM8Vv3kw", "youtube_id": "QkepM8Vv3kw", "readable_id": "linear-algebra-another-least-squares-example"}, "LhrGS4-Dd9I": {"duration": 510, "path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/proof-opposite-sides-of-parallelogram-congruent/", "keywords": "geometry", "id": "LhrGS4-Dd9I", "title": "Proof: Opposite sides of a parallelogram are congruent (and conversely)", "description": "Sal proves that a figure is a parallelogram if and only if opposite sides are congruent.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LhrGS4-Dd9I.mp4/LhrGS4-Dd9I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LhrGS4-Dd9I.mp4/LhrGS4-Dd9I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LhrGS4-Dd9I.m3u8/LhrGS4-Dd9I.m3u8"}, "slug": "proof-opposite-sides-of-parallelogram-congruent", "video_id": "LhrGS4-Dd9I", "youtube_id": "LhrGS4-Dd9I", "readable_id": "proof-opposite-sides-of-parallelogram-congruent"}, "kGrk6V8tWDY": {"duration": 613, "path": "khan/test-prep/mcat/physical-processes/sound/doppler-effect-formula-for-observed-frequency/", "keywords": "doppler, effect, formula", "id": "kGrk6V8tWDY", "title": "Doppler effect formula for observed frequency", "description": "Doppler effect formula for observed frequency", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kGrk6V8tWDY.mp4/kGrk6V8tWDY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kGrk6V8tWDY.mp4/kGrk6V8tWDY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kGrk6V8tWDY.m3u8/kGrk6V8tWDY.m3u8"}, "slug": "doppler-effect-formula-for-observed-frequency", "video_id": "kGrk6V8tWDY", "youtube_id": "kGrk6V8tWDY", "readable_id": "doppler-effect-formula-for-observed-frequency"}, "9CzYnHVFsuk": {"duration": 361, "path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/risk-factors-for-dementia/", "keywords": "Risk Factor,Dementia (Disease Or Medical Condition),Health (Industry)", "id": "9CzYnHVFsuk", "title": "Risk factors for dementia", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9CzYnHVFsuk.mp4/9CzYnHVFsuk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9CzYnHVFsuk.mp4/9CzYnHVFsuk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9CzYnHVFsuk.m3u8/9CzYnHVFsuk.m3u8"}, "slug": "risk-factors-for-dementia", "video_id": "9CzYnHVFsuk", "youtube_id": "9CzYnHVFsuk", "readable_id": "risk-factors-for-dementia"}, "TZ5aMFpwTp8": {"duration": 61, "path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/mars-landing/", "keywords": "", "id": "TZ5aMFpwTp8", "title": "Preparing for landing", "description": "How hard is it to land on Mars?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TZ5aMFpwTp8.mp4/TZ5aMFpwTp8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TZ5aMFpwTp8.mp4/TZ5aMFpwTp8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TZ5aMFpwTp8.m3u8/TZ5aMFpwTp8.m3u8"}, "slug": "mars-landing", "video_id": "TZ5aMFpwTp8", "youtube_id": "TZ5aMFpwTp8", "readable_id": "mars-landing"}, "OSrvGMacWD0": {"duration": 247, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-6-4/", "keywords": "", "id": "OSrvGMacWD0", "title": "4 Rate of change in water tank", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OSrvGMacWD0.mp4/OSrvGMacWD0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OSrvGMacWD0.mp4/OSrvGMacWD0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OSrvGMacWD0.m3u8/OSrvGMacWD0.m3u8"}, "slug": "sat-2010-may-6-4", "video_id": "OSrvGMacWD0", "youtube_id": "OSrvGMacWD0", "readable_id": "sat-2010-may-6-4"}, "rQSclv1Ah5s": {"duration": 367, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/ebsteins-anomoly/", "keywords": "", "id": "rQSclv1Ah5s", "title": "Ebstein's anomoly", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rQSclv1Ah5s.mp4/rQSclv1Ah5s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rQSclv1Ah5s.mp4/rQSclv1Ah5s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rQSclv1Ah5s.m3u8/rQSclv1Ah5s.m3u8"}, "slug": "ebsteins-anomoly", "video_id": "rQSclv1Ah5s", "youtube_id": "rQSclv1Ah5s", "readable_id": "ebsteins-anomoly"}, "3Ee_huKclEQ": {"duration": 300, "path": "khan/math/algebra2/arithmetic-with-polynomials/synthetic-division-of-polynomials/synthetic-division-example-2/", "keywords": "algebra, synthetic, division", "id": "3Ee_huKclEQ", "title": "How to divide polynomials using synthetic division (example)", "description": "Sal divides (2x^5-x^3+3x^2-2x+7) by (x-3) using synthetic division.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3Ee_huKclEQ.mp4/3Ee_huKclEQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3Ee_huKclEQ.mp4/3Ee_huKclEQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3Ee_huKclEQ.m3u8/3Ee_huKclEQ.m3u8"}, "slug": "synthetic-division-example-2", "video_id": "3Ee_huKclEQ", "youtube_id": "3Ee_huKclEQ", "readable_id": "synthetic-division-example-2"}, "jFd-6EPfnec": {"duration": 378, "path": "khan/math/pre-algebra/factors-multiples/greatest_common_divisor/greatest-common-divisor/", "keywords": "math, CC_6_NS_4", "id": "jFd-6EPfnec", "title": "Greatest common factor explained", "description": "Here's a nice explanation of least common factor (or least common divisor) along with a few practice example exercises. Let's roll.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jFd-6EPfnec.mp4/jFd-6EPfnec.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jFd-6EPfnec.mp4/jFd-6EPfnec.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jFd-6EPfnec.m3u8/jFd-6EPfnec.m3u8"}, "slug": "greatest-common-divisor", "video_id": "jFd-6EPfnec", "youtube_id": "jFd-6EPfnec", "readable_id": "greatest-common-divisor"}, "g7GXj5QTnJw": {"duration": 607, "path": "khan/test-prep/mcat/biomolecules/overview-metabolism/oxidation-and-reduction-in-metabolism/", "keywords": "", "id": "g7GXj5QTnJw", "title": "Oxidation and reduction in metabolism", "description": "How is metabolism similar to a galvanic cell? Apply fundamental principles of electrochemistry to understand the energy harnessed from the oxidation-reduction processes of metabolism.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g7GXj5QTnJw.mp4/g7GXj5QTnJw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g7GXj5QTnJw.mp4/g7GXj5QTnJw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g7GXj5QTnJw.m3u8/g7GXj5QTnJw.m3u8"}, "slug": "oxidation-and-reduction-in-metabolism", "video_id": "g7GXj5QTnJw", "youtube_id": "g7GXj5QTnJw", "readable_id": "oxidation-and-reduction-in-metabolism"}, "gX9aKDeAOz4": {"duration": 712, "path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-8-systemic-risk/", "keywords": "paulson, lehman, aig, goldman, bailout, credit, crunch, bernanke", "id": "gX9aKDeAOz4", "title": "Bailout 8: Systemic risk", "description": "How the banks are connected. What happens when one bank fails.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gX9aKDeAOz4.mp4/gX9aKDeAOz4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gX9aKDeAOz4.mp4/gX9aKDeAOz4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gX9aKDeAOz4.m3u8/gX9aKDeAOz4.m3u8"}, "slug": "bailout-8-systemic-risk", "video_id": "gX9aKDeAOz4", "youtube_id": "gX9aKDeAOz4", "readable_id": "bailout-8-systemic-risk"}, "uvgBSJPiQ8Y": {"duration": 325, "path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/brunelleschi-ghiberti-sacrifice-of-isaac-competition-panels-1401-2/", "keywords": "Competition Panels, brunelleschi, ghiberti, florence, baptistery, smarthistory, khan academy, sacrifice of isaac, Abraham, Isaac, renaissance, early renaissance", "id": "uvgBSJPiQ8Y", "title": "Brunelleschi & Ghiberti, the Sacrifice of Isaac", "description": "Brunelleschi & Ghiberti, Sacrifice of Isaac, competition panels for the second set of bronze doors for the Florence Baptistery, 1401-2 Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uvgBSJPiQ8Y.mp4/uvgBSJPiQ8Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uvgBSJPiQ8Y.mp4/uvgBSJPiQ8Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uvgBSJPiQ8Y.m3u8/uvgBSJPiQ8Y.m3u8"}, "slug": "brunelleschi-ghiberti-sacrifice-of-isaac-competition-panels-1401-2", "video_id": "uvgBSJPiQ8Y", "youtube_id": "uvgBSJPiQ8Y", "readable_id": "brunelleschi-ghiberti-sacrifice-of-isaac-competition-panels-1401-2"}, "G7sxV2G-OEo": {"duration": 78, "path": "khan/partner-content/pixar/animate/ball/animation3/", "keywords": "", "id": "G7sxV2G-OEo", "title": "3. Bezier curves", "description": "Using Bezier curves we can get smooth motion between keyframes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/G7sxV2G-OEo.mp4/G7sxV2G-OEo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/G7sxV2G-OEo.mp4/G7sxV2G-OEo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/G7sxV2G-OEo.m3u8/G7sxV2G-OEo.m3u8"}, "slug": "animation3", "video_id": "G7sxV2G-OEo", "youtube_id": "G7sxV2G-OEo", "readable_id": "animation3"}, "qwZn852brII": {"duration": 287, "path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/botticelli-la-primavera-spring-1481-1482/", "keywords": "Botticelli Primavera Uffizi, Smarthistory, Art History", "id": "qwZn852brII", "title": "Botticelli, Primavera", "description": "Botticelli, La Primavera (Spring), 1481-1482, tempera on panel, 80 x 123 1/2\" (203 x 314), Uffizi, Florence Speakers: Dr. Beth Harris and Dr. Steven Zucker http://khan.smarthistory.org/botticelli-primavera.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qwZn852brII.mp4/qwZn852brII.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qwZn852brII.mp4/qwZn852brII.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qwZn852brII.m3u8/qwZn852brII.m3u8"}, "slug": "botticelli-la-primavera-spring-1481-1482", "video_id": "qwZn852brII", "youtube_id": "qwZn852brII", "readable_id": "botticelli-la-primavera-spring-1481-1482"}, "YeBe-yDGVnU": {"duration": 255, "path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/moholy-nagy-composition-a-xx-1924/", "keywords": "Suprematism, Moholy-Nagy, Art History, Smarthistory", "id": "YeBe-yDGVnU", "title": "Moholy-Nagy, Composition A.XX", "description": "L\u00e1szl\u00f3 Moholy-Nagy, Composition A.XX, 1924, oil on canvas, 135.5 x 115cm (Mus\u00e9e national d'art moderne, Centre Georges Pompidou, Paris)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YeBe-yDGVnU.mp4/YeBe-yDGVnU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YeBe-yDGVnU.mp4/YeBe-yDGVnU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YeBe-yDGVnU.m3u8/YeBe-yDGVnU.m3u8"}, "slug": "moholy-nagy-composition-a-xx-1924", "video_id": "YeBe-yDGVnU", "youtube_id": "YeBe-yDGVnU", "readable_id": "moholy-nagy-composition-a-xx-1924"}, "eSjbEWb4Qp4": {"duration": 142, "path": "khan/math/geometry/geometric-constructions/circum-in-circles/constructing-circumscribing-circle/", "keywords": "", "id": "eSjbEWb4Qp4", "title": "Constructing circumscribing circle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eSjbEWb4Qp4.mp4/eSjbEWb4Qp4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eSjbEWb4Qp4.mp4/eSjbEWb4Qp4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eSjbEWb4Qp4.m3u8/eSjbEWb4Qp4.m3u8"}, "slug": "constructing-circumscribing-circle", "video_id": "eSjbEWb4Qp4", "youtube_id": "eSjbEWb4Qp4", "readable_id": "constructing-circumscribing-circle"}, "YC3Z5nqCs_8": {"duration": 120, "path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/cm-start/", "keywords": "", "id": "YC3Z5nqCs_8", "title": "Introduction to subdivision surfaces", "description": "Overview of this topic", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YC3Z5nqCs_8.mp4/YC3Z5nqCs_8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YC3Z5nqCs_8.mp4/YC3Z5nqCs_8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YC3Z5nqCs_8.m3u8/YC3Z5nqCs_8.m3u8"}, "slug": "cm-start", "video_id": "YC3Z5nqCs_8", "youtube_id": "YC3Z5nqCs_8", "readable_id": "cm-start"}, "3tRc6mUumFk": {"duration": 439, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/super-yoga/super-yoga-plans-basic-variables-and-equations/", "keywords": "", "id": "3tRc6mUumFk", "title": "Variables and equations word problem: Putting them to work for Super Yoga", "description": "Using information from the Super Yoga word problem, explore all the possible combinations and create equations which express the possibilities. Let's figure out which plan is best!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3tRc6mUumFk.mp4/3tRc6mUumFk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3tRc6mUumFk.mp4/3tRc6mUumFk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3tRc6mUumFk.m3u8/3tRc6mUumFk.m3u8"}, "slug": "super-yoga-plans-basic-variables-and-equations", "video_id": "3tRc6mUumFk", "youtube_id": "3tRc6mUumFk", "readable_id": "super-yoga-plans-basic-variables-and-equations"}, "jyKMEANFNi0": {"duration": 209, "path": "khan/math/pre-algebra/order-of-operations/place_value/understanding-place-value-1-exercise/", "keywords": "", "id": "jyKMEANFNi0", "title": "Understanding place value 1 exercise", "description": "Here we have a few example exercises in which we are asked to compare place values and determine which are larger or smaller, and by what factor of ten. Let's do it together.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jyKMEANFNi0.mp4/jyKMEANFNi0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jyKMEANFNi0.mp4/jyKMEANFNi0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jyKMEANFNi0.m3u8/jyKMEANFNi0.m3u8"}, "slug": "understanding-place-value-1-exercise", "video_id": "jyKMEANFNi0", "youtube_id": "jyKMEANFNi0", "readable_id": "understanding-place-value-1-exercise"}, "r9aTLTN16V4": {"duration": 382, "path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-example-of-finding-matrix-inverse/", "keywords": "matrix, inverse, example", "id": "r9aTLTN16V4", "title": "Example of finding matrix inverse", "description": "Example of calculating the inverse of a matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/r9aTLTN16V4.mp4/r9aTLTN16V4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/r9aTLTN16V4.mp4/r9aTLTN16V4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/r9aTLTN16V4.m3u8/r9aTLTN16V4.m3u8"}, "slug": "linear-algebra-example-of-finding-matrix-inverse", "video_id": "r9aTLTN16V4", "youtube_id": "r9aTLTN16V4", "readable_id": "linear-algebra-example-of-finding-matrix-inverse"}, "rFmAWQSiqRo": {"duration": 622, "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/nuclear-shielding/", "keywords": "", "id": "rFmAWQSiqRo", "title": "Nuclear shielding", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rFmAWQSiqRo.mp4/rFmAWQSiqRo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rFmAWQSiqRo.mp4/rFmAWQSiqRo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rFmAWQSiqRo.m3u8/rFmAWQSiqRo.m3u8"}, "slug": "nuclear-shielding", "video_id": "rFmAWQSiqRo", "youtube_id": "rFmAWQSiqRo", "readable_id": "nuclear-shielding"}, "nGKffdaI4Pg": {"duration": 226, "path": "khan/test-prep/mcat/physical-processes/sound/production-of-sound/", "keywords": "", "id": "nGKffdaI4Pg", "title": "Production of sound", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nGKffdaI4Pg.mp4/nGKffdaI4Pg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nGKffdaI4Pg.mp4/nGKffdaI4Pg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nGKffdaI4Pg.m3u8/nGKffdaI4Pg.m3u8"}, "slug": "production-of-sound", "video_id": "nGKffdaI4Pg", "youtube_id": "nGKffdaI4Pg", "readable_id": "production-of-sound"}, "7Wd3N8hFfDk": {"duration": 91, "path": "khan/college-admissions/get-started/access-to-college/ss-family-obstacles/", "keywords": "", "id": "7Wd3N8hFfDk", "title": "Student story: Overcoming family obstacles to college", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7Wd3N8hFfDk.mp4/7Wd3N8hFfDk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7Wd3N8hFfDk.mp4/7Wd3N8hFfDk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7Wd3N8hFfDk.m3u8/7Wd3N8hFfDk.m3u8"}, "slug": "ss-family-obstacles", "video_id": "7Wd3N8hFfDk", "youtube_id": "7Wd3N8hFfDk", "readable_id": "ss-family-obstacles"}, "MFMutlhgfzI": {"duration": 362, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/diagnosis-treatment-and-prevention-of-herpes/", "keywords": "", "id": "MFMutlhgfzI", "title": "Diagnosis, treatment, and prevention of herpes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MFMutlhgfzI.mp4/MFMutlhgfzI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MFMutlhgfzI.mp4/MFMutlhgfzI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MFMutlhgfzI.m3u8/MFMutlhgfzI.m3u8"}, "slug": "diagnosis-treatment-and-prevention-of-herpes", "video_id": "MFMutlhgfzI", "youtube_id": "MFMutlhgfzI", "readable_id": "diagnosis-treatment-and-prevention-of-herpes"}, "EuwKjpUpkhs": {"duration": 420, "path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/comparing-exponentials-quadratics/", "keywords": "", "id": "EuwKjpUpkhs", "title": "How to compare the growth of an exponential model and a quadratic model (example)", "description": "Sal discusses two functions that model the shipment rate of cars. One function is quadratic and the other is exponential. Which one will eventually exceed the other?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EuwKjpUpkhs.mp4/EuwKjpUpkhs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EuwKjpUpkhs.mp4/EuwKjpUpkhs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EuwKjpUpkhs.m3u8/EuwKjpUpkhs.m3u8"}, "slug": "comparing-exponentials-quadratics", "video_id": "EuwKjpUpkhs", "youtube_id": "EuwKjpUpkhs", "readable_id": "comparing-exponentials-quadratics"}, "UJxgcVaNTqY": {"duration": 833, "path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/defining-a-plane-in-r3-with-a-point-and-normal-vector/", "keywords": "normal, plane, dot, product, vector", "id": "UJxgcVaNTqY", "title": "Defining a plane in R3 with a point and normal vector", "description": "Determining the equation for a plane in R3 using a point on the plane and a normal vector", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UJxgcVaNTqY.mp4/UJxgcVaNTqY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UJxgcVaNTqY.mp4/UJxgcVaNTqY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UJxgcVaNTqY.m3u8/UJxgcVaNTqY.m3u8"}, "slug": "defining-a-plane-in-r3-with-a-point-and-normal-vector", "video_id": "UJxgcVaNTqY", "youtube_id": "UJxgcVaNTqY", "readable_id": "defining-a-plane-in-r3-with-a-point-and-normal-vector"}, "ay8838UZ4nM": {"duration": 570, "path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/calculus-derivatives-2/", "keywords": "derivative, calculus, math, khan, academy", "id": "ay8838UZ4nM", "title": "Calculus: Derivatives 2", "description": "More intuition of what a derivative is. Using the derivative to find the slope at any point along f(x)=x^2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ay8838UZ4nM.mp4/ay8838UZ4nM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ay8838UZ4nM.mp4/ay8838UZ4nM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ay8838UZ4nM.m3u8/ay8838UZ4nM.m3u8"}, "slug": "calculus-derivatives-2", "video_id": "ay8838UZ4nM", "youtube_id": "ay8838UZ4nM", "readable_id": "calculus-derivatives-2"}, "_s_-J1DFXnQ": {"duration": 1163, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/robert-storr-gerhard-richter-september-2009/", "keywords": "Gerhard, Richter, September, Robert, Storr, painting", "id": "_s_-J1DFXnQ", "title": "Gerhard Richter, September", "description": "Robert Storr talks about Gerhard Richter's painting \"September\". http://www.gerhard-richter.com/art/search/detail.php?13954 F\u00fcr deutsche Untertitel bitte cc anklicken.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_s_-J1DFXnQ.mp4/_s_-J1DFXnQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_s_-J1DFXnQ.mp4/_s_-J1DFXnQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_s_-J1DFXnQ.m3u8/_s_-J1DFXnQ.m3u8"}, "slug": "robert-storr-gerhard-richter-september-2009", "video_id": "_s_-J1DFXnQ", "youtube_id": "_s_-J1DFXnQ", "readable_id": "robert-storr-gerhard-richter-september-2009"}, "ikFUv-gdNLQ": {"duration": 668, "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/saltatory-conduction-neurons/", "keywords": "", "id": "ikFUv-gdNLQ", "title": "Saltatory conduction in neurons", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ikFUv-gdNLQ.mp4/ikFUv-gdNLQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ikFUv-gdNLQ.mp4/ikFUv-gdNLQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ikFUv-gdNLQ.m3u8/ikFUv-gdNLQ.m3u8"}, "slug": "saltatory-conduction-neurons", "video_id": "ikFUv-gdNLQ", "youtube_id": "ikFUv-gdNLQ", "readable_id": "saltatory-conduction-neurons"}, "evdORkjbVMw": {"duration": 162, "path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-overview/", "keywords": "", "id": "evdORkjbVMw", "title": "Khan Academy's Discovery Lab - Summer 2013", "description": "Khan Academy ran a hands-on, project-based learning summer program in 2013. We (and the students) had a lot of fun!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/evdORkjbVMw.mp4/evdORkjbVMw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/evdORkjbVMw.mp4/evdORkjbVMw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/evdORkjbVMw.m3u8/evdORkjbVMw.m3u8"}, "slug": "discovery-lab-overview", "video_id": "evdORkjbVMw", "youtube_id": "evdORkjbVMw", "readable_id": "discovery-lab-overview"}, "Hrjr5f5pZ84": {"duration": 277, "path": "khan/math/algebra-basics/core-algebra-foundations/operations-with-decimals/dividing-decimals-with-hundredths/", "keywords": "", "id": "Hrjr5f5pZ84", "title": "Dividing decimals with hundredths", "description": "Decimal divisors in the hundredths place can be a little confusing. In this video we'll show you how to move the decimal and make it a whole number. Pretty nifty! Watch.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hrjr5f5pZ84.mp4/Hrjr5f5pZ84.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hrjr5f5pZ84.mp4/Hrjr5f5pZ84.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hrjr5f5pZ84.m3u8/Hrjr5f5pZ84.m3u8"}, "slug": "dividing-decimals-with-hundredths", "video_id": "Hrjr5f5pZ84", "youtube_id": "Hrjr5f5pZ84", "readable_id": "dividing-decimals-with-hundredths"}, "P6_sK8hRWCA": {"duration": 186, "path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/combining-like-terms-1/", "keywords": "", "id": "P6_sK8hRWCA", "title": "How to combine like terms", "description": "Another good explanation (minus Chuck Norris) on the how we combine like terms in algebra. This will totally make sense.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P6_sK8hRWCA.mp4/P6_sK8hRWCA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P6_sK8hRWCA.mp4/P6_sK8hRWCA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P6_sK8hRWCA.m3u8/P6_sK8hRWCA.m3u8"}, "slug": "combining-like-terms-1", "video_id": "P6_sK8hRWCA", "youtube_id": "P6_sK8hRWCA", "readable_id": "combining-like-terms-1"}, "j5c6pqAP2IA": {"duration": 129, "path": "khan/math/early-math/cc-early-math-add-sub-20/cc-early-math-repeated-addition/repeated-addition-example/", "keywords": "", "id": "j5c6pqAP2IA", "title": "Repeated addition example", "description": "Learn how to solve word problems by adding the same number many times.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j5c6pqAP2IA.mp4/j5c6pqAP2IA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j5c6pqAP2IA.mp4/j5c6pqAP2IA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j5c6pqAP2IA.m3u8/j5c6pqAP2IA.m3u8"}, "slug": "repeated-addition-example", "video_id": "j5c6pqAP2IA", "youtube_id": "j5c6pqAP2IA", "readable_id": "repeated-addition-example"}, "ckBKDrKVIMU": {"duration": 490, "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/economic-profit-tutorial/depreciation-and-opportunity-cost-of-capital/", "keywords": "microeconomics, economic, profit, depreciation", "id": "ckBKDrKVIMU", "title": "Depreciation and opportunity cost of capital", "description": "How to account for things when you own the building instead of renting it", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ckBKDrKVIMU.mp4/ckBKDrKVIMU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ckBKDrKVIMU.mp4/ckBKDrKVIMU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ckBKDrKVIMU.m3u8/ckBKDrKVIMU.m3u8"}, "slug": "depreciation-and-opportunity-cost-of-capital", "video_id": "ckBKDrKVIMU", "youtube_id": "ckBKDrKVIMU", "readable_id": "depreciation-and-opportunity-cost-of-capital"}, "0fWuPR1AsJ4": {"duration": 439, "path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/hypertension-effects-on-the-heart/", "keywords": "", "id": "0fWuPR1AsJ4", "title": "Hypertension effects on the heart", "description": "Learn 2 major heart problems that hypertension can cause. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0fWuPR1AsJ4.mp4/0fWuPR1AsJ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0fWuPR1AsJ4.mp4/0fWuPR1AsJ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0fWuPR1AsJ4.m3u8/0fWuPR1AsJ4.m3u8"}, "slug": "hypertension-effects-on-the-heart", "video_id": "0fWuPR1AsJ4", "youtube_id": "0fWuPR1AsJ4", "readable_id": "hypertension-effects-on-the-heart"}, "5ZCKr4wTQvI": {"duration": 80, "path": "khan/math/geometry/basic-geometry/area_non_standard/perimeter-of-a-polygon/", "keywords": "u07_l2_t2_we1, Perimeter, of, Polygon", "id": "5ZCKr4wTQvI", "title": "Perimeter of a parallelogram", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5ZCKr4wTQvI.mp4/5ZCKr4wTQvI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5ZCKr4wTQvI.mp4/5ZCKr4wTQvI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5ZCKr4wTQvI.m3u8/5ZCKr4wTQvI.m3u8"}, "slug": "perimeter-of-a-polygon", "video_id": "5ZCKr4wTQvI", "youtube_id": "5ZCKr4wTQvI", "readable_id": "perimeter-of-a-polygon"}, "R0JY8oWsuOY": {"duration": 1152, "path": "khan/math/differential-equations/laplace-transform/laplace-transform-to-solve-differential-equation/laplace-step-function-differential-equation/", "keywords": "differential, equations, laplace, transform", "id": "R0JY8oWsuOY", "title": "Laplace/step function differential equation", "description": "Hairy differential equation involving a step function that we use the Laplace Transform to solve.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R0JY8oWsuOY.mp4/R0JY8oWsuOY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R0JY8oWsuOY.mp4/R0JY8oWsuOY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R0JY8oWsuOY.m3u8/R0JY8oWsuOY.m3u8"}, "slug": "laplace-step-function-differential-equation", "video_id": "R0JY8oWsuOY", "youtube_id": "R0JY8oWsuOY", "readable_id": "laplace-step-function-differential-equation"}, "ROzkyTgscGg": {"duration": 762, "path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/sp2-hybridization-jay-final/", "keywords": "", "id": "ROzkyTgscGg", "title": "Sp2 hybridization", "description": "Sp2 hybrid orbitals and properties of pi bonds.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ROzkyTgscGg.mp4/ROzkyTgscGg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ROzkyTgscGg.mp4/ROzkyTgscGg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ROzkyTgscGg.m3u8/ROzkyTgscGg.m3u8"}, "slug": "sp2-hybridization-jay-final", "video_id": "ROzkyTgscGg", "youtube_id": "ROzkyTgscGg", "readable_id": "sp2-hybridization-jay-final"}, "ZVUH4-Wsdwg": {"duration": 288, "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-christ-crowned-with-thorns-c-1570-76/", "keywords": "", "id": "ZVUH4-Wsdwg", "title": "Titian, Christ Crowned with Thorns", "description": "Titian, Christ Crowned with Thorns, ca. 1570--76, oil on canvas, 280 \u00d7 182 cm. (Alte Pinakothek, Munich) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZVUH4-Wsdwg.mp4/ZVUH4-Wsdwg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZVUH4-Wsdwg.mp4/ZVUH4-Wsdwg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZVUH4-Wsdwg.m3u8/ZVUH4-Wsdwg.m3u8"}, "slug": "titian-christ-crowned-with-thorns-c-1570-76", "video_id": "ZVUH4-Wsdwg", "youtube_id": "ZVUH4-Wsdwg", "readable_id": "titian-christ-crowned-with-thorns-c-1570-76"}, "STB4pbEJxc8": {"duration": 160, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/renaud-laplance/kauffman-renaud-laplanche-3/", "keywords": "", "id": "STB4pbEJxc8", "title": "Sailing the Seas of Entrepreneurship", "description": "Renaud Laplanche was opening his mail when the idea for Lending Club came to him. He tells the story of seeing\u00a0\nthe opportunity and creating the online Lending Club to fill the gap in the financial industries market. Laplache\u2019s\ncompetitive nature extends to one-man sailboat racing and he compares the risks and rewards of racing with setting\nthe pace as an entrepreneur.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/STB4pbEJxc8.mp4/STB4pbEJxc8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/STB4pbEJxc8.mp4/STB4pbEJxc8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/STB4pbEJxc8.m3u8/STB4pbEJxc8.m3u8"}, "slug": "kauffman-renaud-laplanche-3", "video_id": "STB4pbEJxc8", "youtube_id": "STB4pbEJxc8", "readable_id": "kauffman-renaud-laplanche-3"}, "Jni7E2RH43s": {"duration": 252, "path": "khan/math/trigonometry/unit-circle-trig-func/trig-unit-circle/unit-circle-manipulative/", "keywords": "", "id": "Jni7E2RH43s", "title": "Unit circle manipulative", "description": "Walk-through of the Khan Academy Unit Circle manipulative: http://www.khanacademy.org/math/trigonometry/e/unit_circle", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Jni7E2RH43s.mp4/Jni7E2RH43s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Jni7E2RH43s.mp4/Jni7E2RH43s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Jni7E2RH43s.m3u8/Jni7E2RH43s.m3u8"}, "slug": "unit-circle-manipulative", "video_id": "Jni7E2RH43s", "youtube_id": "Jni7E2RH43s", "readable_id": "unit-circle-manipulative"}, "hpWdDmgsIRE": {"duration": 1057, "path": "khan/math/probability/statistics-inferential/chi-square/contingency-table-chi-square-test/", "keywords": "Contingency, Table, Chi-Square, Test, CC_8_SP_4", "id": "hpWdDmgsIRE", "title": "Contingency table chi-square test", "description": "Contingency Table Chi-Square Test", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hpWdDmgsIRE.mp4/hpWdDmgsIRE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hpWdDmgsIRE.mp4/hpWdDmgsIRE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hpWdDmgsIRE.m3u8/hpWdDmgsIRE.m3u8"}, "slug": "contingency-table-chi-square-test", "video_id": "hpWdDmgsIRE", "youtube_id": "hpWdDmgsIRE", "readable_id": "contingency-table-chi-square-test"}, "uaXgGL1dGfU": {"duration": 620, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/nomenclature-and-properties-of-acyl-acid-halides-and-acid-anhydrides/", "keywords": "", "id": "uaXgGL1dGfU", "title": "Nomenclature and properties of acyl (acid) halides and acid anhydrides", "description": "How to name acyl (acid) chlorides and acid anhydrides and how to analyze their physical properties", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uaXgGL1dGfU.mp4/uaXgGL1dGfU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uaXgGL1dGfU.mp4/uaXgGL1dGfU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uaXgGL1dGfU.m3u8/uaXgGL1dGfU.m3u8"}, "slug": "nomenclature-and-properties-of-acyl-acid-halides-and-acid-anhydrides", "video_id": "uaXgGL1dGfU", "youtube_id": "uaXgGL1dGfU", "readable_id": "nomenclature-and-properties-of-acyl-acid-halides-and-acid-anhydrides"}, "MhavOq8O0Ho": {"duration": 599, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/what-is-lung-cancer/", "keywords": "", "id": "MhavOq8O0Ho", "title": "What is lung cancer?", "description": "Lung cancer is a disease where cells in the lungs multiply uncontrollably. The extra cells take up space in the lungs and impair gas exchange and the lung\u2019s ability to expel dirt. Learn how smoking, radon gas, and air pollution increase the risk of lung cancer.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MhavOq8O0Ho.mp4/MhavOq8O0Ho.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MhavOq8O0Ho.mp4/MhavOq8O0Ho.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MhavOq8O0Ho.m3u8/MhavOq8O0Ho.m3u8"}, "slug": "what-is-lung-cancer", "video_id": "MhavOq8O0Ho", "youtube_id": "MhavOq8O0Ho", "readable_id": "what-is-lung-cancer"}, "7TafYJLjhY4": {"duration": 570, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/thinking-about-heartbeats/", "keywords": "", "id": "7TafYJLjhY4", "title": "Thinking about heartbeats", "description": "Find out what happens when things move very slowly through the AV Node! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7TafYJLjhY4.mp4/7TafYJLjhY4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7TafYJLjhY4.mp4/7TafYJLjhY4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7TafYJLjhY4.m3u8/7TafYJLjhY4.m3u8"}, "slug": "thinking-about-heartbeats", "video_id": "7TafYJLjhY4", "youtube_id": "7TafYJLjhY4", "readable_id": "thinking-about-heartbeats"}, "v9Evg2tBdRk": {"duration": 500, "path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/pascals-triangle-binomial-theorem/", "keywords": "", "id": "v9Evg2tBdRk", "title": "Pascal's triangle for binomial expansion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v9Evg2tBdRk.mp4/v9Evg2tBdRk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v9Evg2tBdRk.mp4/v9Evg2tBdRk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v9Evg2tBdRk.m3u8/v9Evg2tBdRk.m3u8"}, "slug": "pascals-triangle-binomial-theorem", "video_id": "v9Evg2tBdRk", "youtube_id": "v9Evg2tBdRk", "readable_id": "pascals-triangle-binomial-theorem"}, "W-5liMGKgHA": {"duration": 321, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/age_word_problems_tut/ex-1-age-word-problem/", "keywords": "age word problems, linear equations", "id": "W-5liMGKgHA", "title": "Age word problem (example 1)", "description": "Arman is 18. Diya is 2. How many years will it take for Arman to be 3 times as old as Diya?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W-5liMGKgHA.mp4/W-5liMGKgHA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W-5liMGKgHA.mp4/W-5liMGKgHA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W-5liMGKgHA.m3u8/W-5liMGKgHA.m3u8"}, "slug": "ex-1-age-word-problem", "video_id": "W-5liMGKgHA", "youtube_id": "W-5liMGKgHA", "readable_id": "ex-1-age-word-problem"}, "U-k5N1WPk4g": {"duration": 599, "path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-of-a-function/", "keywords": "domain, range, algebra, function, CC_39336_F-IF_2", "id": "U-k5N1WPk4g", "title": "Domain of a function", "description": "Figuring out the domain of a function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U-k5N1WPk4g.mp4/U-k5N1WPk4g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U-k5N1WPk4g.mp4/U-k5N1WPk4g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U-k5N1WPk4g.m3u8/U-k5N1WPk4g.m3u8"}, "slug": "domain-of-a-function", "video_id": "U-k5N1WPk4g", "youtube_id": "U-k5N1WPk4g", "readable_id": "domain-of-a-function"}, "vkDCkD88-B0": {"duration": 538, "path": "khan/partner-content/big-history-project/big-bang/claim-testing/how-do-we-decide-what-to-believe/", "keywords": "", "id": "vkDCkD88-B0", "title": "How Do We Decide What to Believe?", "description": "Learn to use \"claim testers\" to evaluate information and decide what you believe!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vkDCkD88-B0.mp4/vkDCkD88-B0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vkDCkD88-B0.mp4/vkDCkD88-B0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vkDCkD88-B0.m3u8/vkDCkD88-B0.m3u8"}, "slug": "how-do-we-decide-what-to-believe", "video_id": "vkDCkD88-B0", "youtube_id": "vkDCkD88-B0", "readable_id": "how-do-we-decide-what-to-believe"}, "3V4Dg6AmI6A": {"duration": 849, "path": "khan/science/physics/forces-newtons-laws/tension-tutorial/the-force-of-tension/", "keywords": "", "id": "3V4Dg6AmI6A", "title": "The force of tension", "description": "David explains what the force of tension is, how to solve for it, and some common misconceptions involving the force of tension.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3V4Dg6AmI6A.mp4/3V4Dg6AmI6A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3V4Dg6AmI6A.mp4/3V4Dg6AmI6A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3V4Dg6AmI6A.m3u8/3V4Dg6AmI6A.m3u8"}, "slug": "the-force-of-tension", "video_id": "3V4Dg6AmI6A", "youtube_id": "3V4Dg6AmI6A", "readable_id": "the-force-of-tension"}, "mN5IvS96wNk": {"duration": 419, "path": "khan/test-prep/mcat/chemical-processes/separations-purifications/gel-electrophoresis/", "keywords": "gel electrophoresis", "id": "mN5IvS96wNk", "title": "Gel electrophoresis", "description": "Learn how gel electrophoresis separates DNA and protein fragments based on size and why one would use agarose gel electrophoresis versus SDS-PAGE. By Angela Guerrero.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mN5IvS96wNk.mp4/mN5IvS96wNk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mN5IvS96wNk.mp4/mN5IvS96wNk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mN5IvS96wNk.m3u8/mN5IvS96wNk.m3u8"}, "slug": "gel-electrophoresis", "video_id": "mN5IvS96wNk", "youtube_id": "mN5IvS96wNk", "readable_id": "gel-electrophoresis"}, "X7GT9JKoAbo": {"duration": 913, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-trigonometry-problem-1/", "keywords": "2010, IIT, JEE, Paper, Trigonometry, law, of, sines, cosines", "id": "X7GT9JKoAbo", "title": "IIT JEE trigonometry problem 1", "description": "2010 IIT JEE Paper I #29 Trigonometry problem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X7GT9JKoAbo.mp4/X7GT9JKoAbo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X7GT9JKoAbo.mp4/X7GT9JKoAbo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X7GT9JKoAbo.m3u8/X7GT9JKoAbo.m3u8"}, "slug": "iit-jee-trigonometry-problem-1", "video_id": "X7GT9JKoAbo", "youtube_id": "X7GT9JKoAbo", "readable_id": "iit-jee-trigonometry-problem-1"}, "cLICU2cDHrs": {"duration": 219, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-crucifixion-of-st-peter-1601/", "keywords": "Caravaggio, St. Peter, Rome, Santa Maria del Popolo, Art History, Baroque, Smarthistory", "id": "cLICU2cDHrs", "title": "Caravaggio, Crucifixion of Saint Peter", "description": "Caravaggio, Crucifixion of St. Peter, oil on canvas, 1601 (Santa Maria del Popolo, Rome) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cLICU2cDHrs.mp4/cLICU2cDHrs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cLICU2cDHrs.mp4/cLICU2cDHrs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cLICU2cDHrs.m3u8/cLICU2cDHrs.m3u8"}, "slug": "caravaggio-crucifixion-of-st-peter-1601", "video_id": "cLICU2cDHrs", "youtube_id": "cLICU2cDHrs", "readable_id": "caravaggio-crucifixion-of-st-peter-1601"}, "A90HKrgUOg0": {"duration": 493, "path": "khan/science/biology/energy-and-enzymes/introduction-to-enzymes/enzymes/", "keywords": "education,online learning,learning,lessons,enzyme,denature,substrate,reaction,induced fit,Chemistry (Field Of Study)", "id": "A90HKrgUOg0", "title": "Enzymes", "description": "Enzymes as catalysts for reactions in biological systems; discussion of substrates, active sites, induced fit, and activation energy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A90HKrgUOg0.mp4/A90HKrgUOg0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A90HKrgUOg0.mp4/A90HKrgUOg0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A90HKrgUOg0.m3u8/A90HKrgUOg0.m3u8"}, "slug": "enzymes", "video_id": "A90HKrgUOg0", "youtube_id": "A90HKrgUOg0", "readable_id": "enzymes"}, "BOHUX-DAdVE": {"duration": 405, "path": "khan/partner-content/big-history-project/life/other-materials5/bhp-intro-conservation-science/", "keywords": "", "id": "BOHUX-DAdVE", "title": "Introduction to Conservation Science", "description": "Sanjayan discusses the field of conservation science and considers the future of the biosphere.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BOHUX-DAdVE.mp4/BOHUX-DAdVE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BOHUX-DAdVE.mp4/BOHUX-DAdVE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BOHUX-DAdVE.m3u8/BOHUX-DAdVE.m3u8"}, "slug": "bhp-intro-conservation-science", "video_id": "BOHUX-DAdVE", "youtube_id": "BOHUX-DAdVE", "readable_id": "bhp-intro-conservation-science"}, "7AOOlxbZN3E": {"duration": 438, "path": "khan/humanities/history/euro-hist/world-war-i-fighting/schlieffen-plan-and-the-first-battle-of-the-marne/", "keywords": "", "id": "7AOOlxbZN3E", "title": "Schlieffen Plan and the First Battle of the Marne", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7AOOlxbZN3E.mp4/7AOOlxbZN3E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7AOOlxbZN3E.mp4/7AOOlxbZN3E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7AOOlxbZN3E.m3u8/7AOOlxbZN3E.m3u8"}, "slug": "schlieffen-plan-and-the-first-battle-of-the-marne", "video_id": "7AOOlxbZN3E", "youtube_id": "7AOOlxbZN3E", "readable_id": "schlieffen-plan-and-the-first-battle-of-the-marne"}, "diVGZxXh-dg": {"duration": 678, "path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/introduction-to-psychology-depression-and-major-depressive-disorder/", "keywords": "Depression (Symptom),Major Depression (Disease Or Medical Condition),Mental Illness (Disease Or Medical Condition)", "id": "diVGZxXh-dg", "title": "Introduction to psychology - Depression and major depressive disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/diVGZxXh-dg.mp4/diVGZxXh-dg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/diVGZxXh-dg.mp4/diVGZxXh-dg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/diVGZxXh-dg.m3u8/diVGZxXh-dg.m3u8"}, "slug": "introduction-to-psychology-depression-and-major-depressive-disorder", "video_id": "diVGZxXh-dg", "youtube_id": "diVGZxXh-dg", "readable_id": "introduction-to-psychology-depression-and-major-depressive-disorder"}, "JcqCf762y9w": {"duration": 218, "path": "khan/math/geometry/intro_euclid/lines-line-segments-and-rays/", "keywords": "geometry", "id": "JcqCf762y9w", "title": "Intro to lines, line segments, and rays", "description": "Let's get familiar with the difference between lines, line segments, and rays. Hint: a ray is somewhere between a line and a line segment!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JcqCf762y9w.mp4/JcqCf762y9w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JcqCf762y9w.mp4/JcqCf762y9w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JcqCf762y9w.m3u8/JcqCf762y9w.m3u8"}, "slug": "lines-line-segments-and-rays", "video_id": "JcqCf762y9w", "youtube_id": "JcqCf762y9w", "readable_id": "lines-line-segments-and-rays"}, "rxJRhbS_21c": {"duration": 434, "path": "khan/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/sat-differences-of-new-sat/", "keywords": "", "id": "rxJRhbS_21c", "title": "Content changes to the new SAT", "description": "Sal covers the major content changes to the new SAT.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rxJRhbS_21c.mp4/rxJRhbS_21c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rxJRhbS_21c.mp4/rxJRhbS_21c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rxJRhbS_21c.m3u8/rxJRhbS_21c.m3u8"}, "slug": "sat-differences-of-new-sat", "video_id": "rxJRhbS_21c", "youtube_id": "rxJRhbS_21c", "readable_id": "sat-differences-of-new-sat"}, "aHzd-u35LuA": {"duration": 275, "path": "khan/math/trigonometry/basic-trigonometry/trig-application-problems/angle-to-aim-to-get-alien/", "keywords": "", "id": "aHzd-u35LuA", "title": "Angle to aim to get alien", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aHzd-u35LuA.mp4/aHzd-u35LuA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aHzd-u35LuA.mp4/aHzd-u35LuA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aHzd-u35LuA.m3u8/aHzd-u35LuA.m3u8"}, "slug": "angle-to-aim-to-get-alien", "video_id": "aHzd-u35LuA", "youtube_id": "aHzd-u35LuA", "readable_id": "angle-to-aim-to-get-alien"}, "z6lL83wl31E": {"duration": 194, "path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/origami-proof-of-the-pythagorean-theorem/", "keywords": "pythagorean theorem, geometry, mathematics, trigonometry, origami, paper folding, proof", "id": "z6lL83wl31E", "title": "Origami proof of the Pythagorean theorem", "description": "Leave your homework in the comments. Extra points for clarity and conciseness!\n\nSpecial thanks to my peeps at NYU where the idea for this video popped up during discussion.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z6lL83wl31E.mp4/z6lL83wl31E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z6lL83wl31E.mp4/z6lL83wl31E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z6lL83wl31E.m3u8/z6lL83wl31E.m3u8"}, "slug": "origami-proof-of-the-pythagorean-theorem", "video_id": "z6lL83wl31E", "youtube_id": "z6lL83wl31E", "readable_id": "origami-proof-of-the-pythagorean-theorem"}, "d8De3xcVmnw": {"duration": 273, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/more-equation-practice/sum-of-consecutive-odd-integers/", "keywords": "U02_L1_T3_we2, algebra, sum, of, integers, CC_6_EE_6, CC_39336_A-REI_1, CC_39336_A-REI_3", "id": "d8De3xcVmnw", "title": "Challenge example: Sum of integers", "description": "Sum of Consecutive Odd Integers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d8De3xcVmnw.mp4/d8De3xcVmnw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d8De3xcVmnw.mp4/d8De3xcVmnw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d8De3xcVmnw.m3u8/d8De3xcVmnw.m3u8"}, "slug": "sum-of-consecutive-odd-integers", "video_id": "d8De3xcVmnw", "youtube_id": "d8De3xcVmnw", "readable_id": "sum-of-consecutive-odd-integers"}, "mr9Tow8hpCg": {"duration": 1285, "path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/linear-algebra-showing-that-inverses-are-linear/", "keywords": "inverse, invertibility, linear, transformation", "id": "mr9Tow8hpCg", "title": "Showing that inverses are linear", "description": "Showing that inverse transformations are also linear", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mr9Tow8hpCg.mp4/mr9Tow8hpCg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mr9Tow8hpCg.mp4/mr9Tow8hpCg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mr9Tow8hpCg.m3u8/mr9Tow8hpCg.m3u8"}, "slug": "linear-algebra-showing-that-inverses-are-linear", "video_id": "mr9Tow8hpCg", "youtube_id": "mr9Tow8hpCg", "readable_id": "linear-algebra-showing-that-inverses-are-linear"}, "7PsgPJoGWig": {"duration": 274, "path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/martini-annunciation-1333/", "keywords": "smarthistory, Art History, Annunciation, Renaissance, Uffizi, Siena", "id": "7PsgPJoGWig", "title": "Simone Martini, Annunciation", "description": "Simone Martini, Annunciation, 1333, tempera on panel, 72 1/2 x 82 5/8\" or 184 x 210 cm. (Uffizi, Florence) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7PsgPJoGWig.mp4/7PsgPJoGWig.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7PsgPJoGWig.mp4/7PsgPJoGWig.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7PsgPJoGWig.m3u8/7PsgPJoGWig.m3u8"}, "slug": "martini-annunciation-1333", "video_id": "7PsgPJoGWig", "youtube_id": "7PsgPJoGWig", "readable_id": "martini-annunciation-1333"}, "9tmtDBpqq9s": {"duration": 156, "path": "khan/math/pre-algebra/decimals-pre-alg/dec-perc-frac-pre-alg/adding-and-subtracting-three-fractions/", "keywords": "", "id": "9tmtDBpqq9s", "title": "Adding, subtracting fractions", "description": "Add and subtract negative fractions with unlike denominators.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9tmtDBpqq9s.mp4/9tmtDBpqq9s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9tmtDBpqq9s.mp4/9tmtDBpqq9s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9tmtDBpqq9s.m3u8/9tmtDBpqq9s.m3u8"}, "slug": "adding-and-subtracting-three-fractions", "video_id": "9tmtDBpqq9s", "youtube_id": "9tmtDBpqq9s", "readable_id": "adding-and-subtracting-three-fractions"}, "Badvask-UDU": {"duration": 131, "path": "khan/math/pre-algebra/order-of-operations/ditributive_property/the-distributive-property-2/", "keywords": "U01_L4_T2_we2, The, Distributive, Property, CC_3_OA_5, CC_5_OA_1, CC_6_EE_3, CC_6_NS_4, CC_7_EE_1", "id": "Badvask-UDU", "title": "The distributive law of multiplication over subtraction", "description": "Learn how to apply the distributive property of multiplication over subtraction and why it works. This is sometimes just called the distributive property or distributive law.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Badvask-UDU.mp4/Badvask-UDU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Badvask-UDU.mp4/Badvask-UDU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Badvask-UDU.m3u8/Badvask-UDU.m3u8"}, "slug": "the-distributive-property-2", "video_id": "Badvask-UDU", "youtube_id": "Badvask-UDU", "readable_id": "the-distributive-property-2"}, "_AuTtAkRN3w": {"duration": 334, "path": "khan/test-prep/nclex-rn/rn-mental-health/anxiety-rn/phobias/", "keywords": "Phobia (Disease Or Medical Condition),Health (Industry)", "id": "_AuTtAkRN3w", "title": "Phobias", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_AuTtAkRN3w.mp4/_AuTtAkRN3w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_AuTtAkRN3w.mp4/_AuTtAkRN3w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_AuTtAkRN3w.m3u8/_AuTtAkRN3w.m3u8"}, "slug": "phobias", "video_id": "_AuTtAkRN3w", "youtube_id": "_AuTtAkRN3w", "readable_id": "phobias"}, "vD1OROM3Lfo": {"duration": 628, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-28/", "keywords": "gmat, data, sufficiency, math", "id": "vD1OROM3Lfo", "title": "GMAT: Data sufficiency 28", "description": "116-118, pg. 288", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vD1OROM3Lfo.mp4/vD1OROM3Lfo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vD1OROM3Lfo.mp4/vD1OROM3Lfo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vD1OROM3Lfo.m3u8/vD1OROM3Lfo.m3u8"}, "slug": "gmat-data-sufficiency-28", "video_id": "vD1OROM3Lfo", "youtube_id": "vD1OROM3Lfo", "readable_id": "gmat-data-sufficiency-28"}, "RDgF0F_9PwM": {"duration": 54, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-26-inconsistent-science/", "keywords": "", "id": "RDgF0F_9PwM", "title": "26 Inconsistent science", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RDgF0F_9PwM.mp4/RDgF0F_9PwM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RDgF0F_9PwM.mp4/RDgF0F_9PwM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RDgF0F_9PwM.m3u8/RDgF0F_9PwM.m3u8"}, "slug": "sat-26-inconsistent-science", "video_id": "RDgF0F_9PwM", "youtube_id": "RDgF0F_9PwM", "readable_id": "sat-26-inconsistent-science"}, "_5lmQ_dQOU4": {"duration": 541, "path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/regulation-of-pyruvate-dehydrogenase/", "keywords": "", "id": "_5lmQ_dQOU4", "title": "Regulation of pyruvate dehydrogenase", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_5lmQ_dQOU4.mp4/_5lmQ_dQOU4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_5lmQ_dQOU4.mp4/_5lmQ_dQOU4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_5lmQ_dQOU4.m3u8/_5lmQ_dQOU4.m3u8"}, "slug": "regulation-of-pyruvate-dehydrogenase", "video_id": "_5lmQ_dQOU4", "youtube_id": "_5lmQ_dQOU4", "readable_id": "regulation-of-pyruvate-dehydrogenase"}, "podbMDjFNAY": {"duration": 738, "path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/decolonization-world-history-40/", "keywords": "crash course", "id": "podbMDjFNAY", "title": "Decolonization and Nationalism Triumphant", "description": "In which John Green teaches you about the post-World War II breakup of most of the European empires. As you'll remember from previous installments of Crash Course, Europeans spent several centuries sailing around the world creating empires, despite the fact that most of the places they conquered were perfectly happy to carry on alone. After World War II, most of these empires collapsed. This is the story of those collapses. In most places, the end of empire was not orderly, and violence often ensued. While India was a (sort of) shining example of non-violent change, in places like The Congo, Egypt, Rwanda, Vietnam, Cambodia, and Laos, things didn't go smoothly at all. John brings you all this, plus pictures of Sea Monkeys. Sadly, they don't look anything like those awesome commercials in the comic books.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/podbMDjFNAY.mp4/podbMDjFNAY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/podbMDjFNAY.mp4/podbMDjFNAY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/podbMDjFNAY.m3u8/podbMDjFNAY.m3u8"}, "slug": "decolonization-world-history-40", "video_id": "podbMDjFNAY", "youtube_id": "podbMDjFNAY", "readable_id": "decolonization-world-history-40"}, "5iUh_CSjaSw": {"duration": 260, "path": "khan/math/recreational-math/vi-hart/pi-tau/anti-pi-rant-2014/", "keywords": "pi", "id": "5iUh_CSjaSw", "title": "Anti-Pi Rant, 3/14/14", "description": "Sorry, Pi lovers! Maybe pick a better favorite number next time?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5iUh_CSjaSw.mp4/5iUh_CSjaSw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5iUh_CSjaSw.mp4/5iUh_CSjaSw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5iUh_CSjaSw.m3u8/5iUh_CSjaSw.m3u8"}, "slug": "anti-pi-rant-2014", "video_id": "5iUh_CSjaSw", "youtube_id": "5iUh_CSjaSw", "readable_id": "anti-pi-rant-2014"}, "wvtPCKwGZCU": {"duration": 325, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/edgar-degas-visit-to-a-museum-c-1879-90/", "keywords": "Edgar Degas, Degas, Visit to a Museum, 1879, 1890, Museum of Fine Arts, Boston, Paris, Louvre, Cassatt, Mary Cassatt, Lydia, looking at art, gesture, series, painting, art, Impressionism, Realism, Educational, Google Art Project, Smarthistory, Khan Academy, OER, art history, museum visitor", "id": "wvtPCKwGZCU", "title": "Degas, Visit to a Museum", "description": "Edgar Degas, Visit to a Museum, c. 1879--90, oil on canvas, 91.8 x 68 cm / 36-1/8 x 26-3/4 inches (Museum of Fine Arts, Boston)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wvtPCKwGZCU.mp4/wvtPCKwGZCU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wvtPCKwGZCU.mp4/wvtPCKwGZCU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wvtPCKwGZCU.m3u8/wvtPCKwGZCU.m3u8"}, "slug": "edgar-degas-visit-to-a-museum-c-1879-90", "video_id": "wvtPCKwGZCU", "youtube_id": "wvtPCKwGZCU", "readable_id": "edgar-degas-visit-to-a-museum-c-1879-90"}, "sO9xwAyeWX0": {"duration": 197, "path": "khan/partner-content/wi-phi/critical-thinking/gi-joe-fallacy/", "keywords": "Critical Thinking (Literature Subject),Philosophy (Field Of Study),Cognitive Bias,Cognitive Science (Field Of Study),Cognitive Psychology (Field Of Study),Psychology (Field Of Study),Behavioral Economics (Field Of Study),Laurie Santos,Yale University (College/University),Khan Academy (Nonprofit Organization),G.I. Joe (Collection Category),Wiphi,Wireless Philosophy", "id": "sO9xwAyeWX0", "title": "Cognitive Biases: The GI Joe Fallacy", "description": "In this video, Laurie Santos (Yale University) discusses why knowing about our cognitive biases is not enough to overcome them. She\u2019ll introduce a new cognitive error known as the G.I. Joe Fallacy, the tendency for our biases to stick around even when we should know better.\n\nSpeaker: Dr.\u00a0Laurie Santos, Associate Professor of Psychology, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sO9xwAyeWX0.mp4/sO9xwAyeWX0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sO9xwAyeWX0.mp4/sO9xwAyeWX0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sO9xwAyeWX0.m3u8/sO9xwAyeWX0.m3u8"}, "slug": "gi-joe-fallacy", "video_id": "sO9xwAyeWX0", "youtube_id": "sO9xwAyeWX0", "readable_id": "gi-joe-fallacy"}, "Ijret8P3kWM": {"duration": 451, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/active-contraction-vs-passive-recoil/", "keywords": "", "id": "Ijret8P3kWM", "title": "Active contraction vs. passive recoil", "description": "Go through the similarities and differences between the sarcomere and a slingshot! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ijret8P3kWM.mp4/Ijret8P3kWM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ijret8P3kWM.mp4/Ijret8P3kWM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ijret8P3kWM.m3u8/Ijret8P3kWM.m3u8"}, "slug": "active-contraction-vs-passive-recoil", "video_id": "Ijret8P3kWM", "youtube_id": "Ijret8P3kWM", "readable_id": "active-contraction-vs-passive-recoil"}, "UCCNoXqCGZQ": {"duration": 325, "path": "khan/math/recreational-math/math-warmup/arithmetic-warmups/exponents-warmup/", "keywords": "", "id": "UCCNoXqCGZQ", "title": "Exponentiation warmup", "description": "introduction to exponents and exponential growth", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UCCNoXqCGZQ.mp4/UCCNoXqCGZQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UCCNoXqCGZQ.mp4/UCCNoXqCGZQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UCCNoXqCGZQ.m3u8/UCCNoXqCGZQ.m3u8"}, "slug": "exponents-warmup", "video_id": "UCCNoXqCGZQ", "youtube_id": "UCCNoXqCGZQ", "readable_id": "exponents-warmup"}, "CvSOaYi89B4": {"duration": 279, "path": "khan/partner-content/dartmouth-college/dartmouth-algorithms/what-are-algorithms/", "keywords": "", "id": "CvSOaYi89B4", "title": "What is an algorithm and why should you care?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CvSOaYi89B4.mp4/CvSOaYi89B4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CvSOaYi89B4.mp4/CvSOaYi89B4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CvSOaYi89B4.m3u8/CvSOaYi89B4.m3u8"}, "slug": "what-are-algorithms", "video_id": "CvSOaYi89B4", "youtube_id": "CvSOaYi89B4", "readable_id": "what-are-algorithms"}, "_RrZggEhSJA": {"duration": 433, "path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/emotion-and-cognition-in-prejudice/", "keywords": "", "id": "_RrZggEhSJA", "title": "Emotion and cognition in prejudice", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_RrZggEhSJA.mp4/_RrZggEhSJA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_RrZggEhSJA.mp4/_RrZggEhSJA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_RrZggEhSJA.m3u8/_RrZggEhSJA.m3u8"}, "slug": "emotion-and-cognition-in-prejudice", "video_id": "_RrZggEhSJA", "youtube_id": "_RrZggEhSJA", "readable_id": "emotion-and-cognition-in-prejudice"}, "-a_w0_VAo6U": {"duration": 167, "path": "khan/math/pre-algebra/fractions-pre-alg/understanding-fractions-pre-alg/identifying-fraction-parts/", "keywords": "U02_l1_T1_we2, Identifying, Fraction, Parts", "id": "-a_w0_VAo6U", "title": "Identifying fraction parts", "description": "Identifying Fraction Parts", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-a_w0_VAo6U.mp4/-a_w0_VAo6U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-a_w0_VAo6U.mp4/-a_w0_VAo6U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-a_w0_VAo6U.m3u8/-a_w0_VAo6U.m3u8"}, "slug": "identifying-fraction-parts", "video_id": "-a_w0_VAo6U", "youtube_id": "-a_w0_VAo6U", "readable_id": "identifying-fraction-parts"}, "UAXapQvZe2w": {"duration": 300, "path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/dream-theories-freud-activation-synthnesis-hypothesis/", "keywords": "", "id": "UAXapQvZe2w", "title": "Dream theories Freud, activation synthesis hypothesis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UAXapQvZe2w.mp4/UAXapQvZe2w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UAXapQvZe2w.mp4/UAXapQvZe2w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UAXapQvZe2w.m3u8/UAXapQvZe2w.m3u8"}, "slug": "dream-theories-freud-activation-synthnesis-hypothesis", "video_id": "UAXapQvZe2w", "youtube_id": "UAXapQvZe2w", "readable_id": "dream-theories-freud-activation-synthnesis-hypothesis"}, "Jts_mdQmbUg": {"duration": 138, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/sat-1-private-universities/", "keywords": "", "id": "Jts_mdQmbUg", "title": "1 Private universities", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Jts_mdQmbUg.mp4/Jts_mdQmbUg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Jts_mdQmbUg.mp4/Jts_mdQmbUg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Jts_mdQmbUg.m3u8/Jts_mdQmbUg.m3u8"}, "slug": "sat-1-private-universities", "video_id": "Jts_mdQmbUg", "youtube_id": "Jts_mdQmbUg", "readable_id": "sat-1-private-universities"}, "cJXY3Cywrnc": {"duration": 666, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/breathing-control/peripheral-chemoreceptors/", "keywords": "", "id": "cJXY3Cywrnc", "title": "Peripheral chemoreceptors", "description": "Find out how the your body uses special cells that are peripheral to the brain (outside the brain) to sense levels of O2, CO2, and pH. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cJXY3Cywrnc.mp4/cJXY3Cywrnc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cJXY3Cywrnc.mp4/cJXY3Cywrnc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cJXY3Cywrnc.m3u8/cJXY3Cywrnc.m3u8"}, "slug": "peripheral-chemoreceptors", "video_id": "cJXY3Cywrnc", "youtube_id": "cJXY3Cywrnc", "readable_id": "peripheral-chemoreceptors"}, "eElHlE4j-vw": {"duration": 646, "path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/estate-tax-introduction/", "keywords": "inheritance, death, tax", "id": "eElHlE4j-vw", "title": "Estate tax introduction", "description": "Overview of the estate tax", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eElHlE4j-vw.mp4/eElHlE4j-vw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eElHlE4j-vw.mp4/eElHlE4j-vw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eElHlE4j-vw.m3u8/eElHlE4j-vw.m3u8"}, "slug": "estate-tax-introduction", "video_id": "eElHlE4j-vw", "youtube_id": "eElHlE4j-vw", "readable_id": "estate-tax-introduction"}, "Cg4KlmI_acs": {"duration": 742, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/fick-s-law-of-diffusion/", "keywords": "", "id": "Cg4KlmI_acs", "title": "Fick's law of diffusion", "description": "Learn all of the different ways to maximize the amount of particles that diffuse over a short distance over time. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Cg4KlmI_acs.mp4/Cg4KlmI_acs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Cg4KlmI_acs.mp4/Cg4KlmI_acs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Cg4KlmI_acs.m3u8/Cg4KlmI_acs.m3u8"}, "slug": "fick-s-law-of-diffusion", "video_id": "Cg4KlmI_acs", "youtube_id": "Cg4KlmI_acs", "readable_id": "fick-s-law-of-diffusion"}, "Smd-q44ysoM": {"duration": 750, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/raphael-school-of-athens/", "keywords": "Raphael, School of Athens, Vatican, Vatican Museums", "id": "Smd-q44ysoM", "title": "Raphael, School of Athens", "description": "Raphael, School of Athens, fresco, 1509-1511 (Stanza della Segnatura, Papal Palace, Vatican)\n\nSpeakers: Dr. Steven Zucker, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Smd-q44ysoM.mp4/Smd-q44ysoM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Smd-q44ysoM.mp4/Smd-q44ysoM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Smd-q44ysoM.m3u8/Smd-q44ysoM.m3u8"}, "slug": "raphael-school-of-athens", "video_id": "Smd-q44ysoM", "youtube_id": "Smd-q44ysoM", "readable_id": "raphael-school-of-athens"}, "1JudNLK1-Ck": {"duration": 674, "path": "khan/science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases/arteriolosclerosis-part-1/", "keywords": "", "id": "1JudNLK1-Ck", "title": "Arteriolosclerosis - part 1", "description": "See how hyaline arteriolosclerosis (Protein in the arterial wall) causes hardening of the blood vessels. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1JudNLK1-Ck.mp4/1JudNLK1-Ck.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1JudNLK1-Ck.mp4/1JudNLK1-Ck.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1JudNLK1-Ck.m3u8/1JudNLK1-Ck.m3u8"}, "slug": "arteriolosclerosis-part-1", "video_id": "1JudNLK1-Ck", "youtube_id": "1JudNLK1-Ck", "readable_id": "arteriolosclerosis-part-1"}, "KiouveG278Y": {"duration": 376, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/nerve-regulation-of-the-heart/autonomic-nervous-system-effects-on-the-heart/", "keywords": "", "id": "KiouveG278Y", "title": "Autonomic nervous system effects on the heart", "description": "Carefully go through each of the four major effects that the sympathetic and parasympathetic system has on your heart: Chronotropy, Dromotropy, Inotropy, and Lusitropy. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KiouveG278Y.mp4/KiouveG278Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KiouveG278Y.mp4/KiouveG278Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KiouveG278Y.m3u8/KiouveG278Y.m3u8"}, "slug": "autonomic-nervous-system-effects-on-the-heart", "video_id": "KiouveG278Y", "youtube_id": "KiouveG278Y", "readable_id": "autonomic-nervous-system-effects-on-the-heart"}, "tvpp2lAD9iY": {"duration": 289, "path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/robert-rauschenberg-bed-1955/", "keywords": "", "id": "tvpp2lAD9iY", "title": "Robert Rauschenberg, Bed", "description": "Robert Rauschenberg, Bed, 1955, oil and pencil on pillow, quilt, and sheet on wood supports, 191.1 x 80 x 20.3 cm (The Museum of Modern Art) \u00a9 2013 Robert Rauschenberg Foundation\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tvpp2lAD9iY.mp4/tvpp2lAD9iY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tvpp2lAD9iY.mp4/tvpp2lAD9iY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tvpp2lAD9iY.m3u8/tvpp2lAD9iY.m3u8"}, "slug": "robert-rauschenberg-bed-1955", "video_id": "tvpp2lAD9iY", "youtube_id": "tvpp2lAD9iY", "readable_id": "robert-rauschenberg-bed-1955"}, "L_lCAaTKIRE": {"duration": 100, "path": "khan/partner-content/pixar/animate/ball/animate-4/", "keywords": "", "id": "L_lCAaTKIRE", "title": "4. Squash and stretch", "description": "Let's breath some life into our ball using a key animation principle: squash and stretch.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L_lCAaTKIRE.mp4/L_lCAaTKIRE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L_lCAaTKIRE.mp4/L_lCAaTKIRE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L_lCAaTKIRE.m3u8/L_lCAaTKIRE.m3u8"}, "slug": "animate-4", "video_id": "L_lCAaTKIRE", "youtube_id": "L_lCAaTKIRE", "readable_id": "animate-4"}, "yar47jvr7M8": {"duration": 979, "path": "khan/test-prep/mcat/behavior/psychological-disorders/categories-of-mental-disorders/", "keywords": "", "id": "yar47jvr7M8", "title": "Categories of mental disorders", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yar47jvr7M8.mp4/yar47jvr7M8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yar47jvr7M8.mp4/yar47jvr7M8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yar47jvr7M8.m3u8/yar47jvr7M8.m3u8"}, "slug": "categories-of-mental-disorders", "video_id": "yar47jvr7M8", "youtube_id": "yar47jvr7M8", "readable_id": "categories-of-mental-disorders"}, "niTxSf60wDs": {"duration": 600, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/torsades-de-pointes/", "keywords": "", "id": "niTxSf60wDs", "title": "Torsades de pointes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/niTxSf60wDs.mp4/niTxSf60wDs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/niTxSf60wDs.mp4/niTxSf60wDs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/niTxSf60wDs.m3u8/niTxSf60wDs.m3u8"}, "slug": "torsades-de-pointes", "video_id": "niTxSf60wDs", "youtube_id": "niTxSf60wDs", "readable_id": "torsades-de-pointes"}, "Wm-akMcsHEc": {"duration": 413, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/francesco-borromini-san-carlo-1638-1646/", "keywords": "art history, smarthistory, baroque, architecture, borromini, Rome, San Carlo, Cardinal Francesco Barberini, Holy Order of the Trinity.", "id": "Wm-akMcsHEc", "title": "Borromini, San Carlo alle Quattro Fontane", "description": "Francesco Borromini, San Carlo alle Quattro Fontane (\"Carlino\"), Rome. Commissioned by Cardinal Francesco Barberini in 1634 for the Holy Order of the Trinity; construction began in 1638 and the church was consecrated in 1646.\n\nSpeakers: Frank Dabell, Dr. Beth Harris, and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Wm-akMcsHEc.mp4/Wm-akMcsHEc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Wm-akMcsHEc.mp4/Wm-akMcsHEc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Wm-akMcsHEc.m3u8/Wm-akMcsHEc.m3u8"}, "slug": "francesco-borromini-san-carlo-1638-1646", "video_id": "Wm-akMcsHEc", "youtube_id": "Wm-akMcsHEc", "readable_id": "francesco-borromini-san-carlo-1638-1646"}, "g_ijRF_NMLk": {"duration": 115, "path": "khan/math/geometry/transformations/hs-geo-translations/drawing-image-of-translation/", "keywords": "", "id": "g_ijRF_NMLk", "title": "How to draw the image of a translation (example)", "description": "Sal is given a triangle on the coordinate plane and the definition of a translation, and he draws the image of the triangle under that dilation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g_ijRF_NMLk.mp4/g_ijRF_NMLk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g_ijRF_NMLk.mp4/g_ijRF_NMLk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g_ijRF_NMLk.m3u8/g_ijRF_NMLk.m3u8"}, "slug": "drawing-image-of-translation", "video_id": "g_ijRF_NMLk", "youtube_id": "g_ijRF_NMLk", "readable_id": "drawing-image-of-translation"}, "qMaVLzWnS80": {"duration": 730, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/what-is-vasculitis/", "keywords": "", "id": "qMaVLzWnS80", "title": "What is vasculitis?", "description": "Vasculitis is a group of medical conditions which cause damage to the blood vessels through inflammation. Depending on which blood vessels are affected, vasculitis can be classified as large vessel, medium vessel, or small vessel vasculitis. Learn about the signs and symptoms of vasculitis such as purpura, bloody stool and urine, and bruits.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qMaVLzWnS80.mp4/qMaVLzWnS80.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qMaVLzWnS80.mp4/qMaVLzWnS80.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qMaVLzWnS80.m3u8/qMaVLzWnS80.m3u8"}, "slug": "what-is-vasculitis", "video_id": "qMaVLzWnS80", "youtube_id": "qMaVLzWnS80", "readable_id": "what-is-vasculitis"}, "iPwrDWQ7hPc": {"duration": 795, "path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/binomial-theorem/", "keywords": "", "id": "iPwrDWQ7hPc", "title": "Binomial theorem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iPwrDWQ7hPc.mp4/iPwrDWQ7hPc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iPwrDWQ7hPc.mp4/iPwrDWQ7hPc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iPwrDWQ7hPc.m3u8/iPwrDWQ7hPc.m3u8"}, "slug": "binomial-theorem", "video_id": "iPwrDWQ7hPc", "youtube_id": "iPwrDWQ7hPc", "readable_id": "binomial-theorem"}, "Q3wfb0CPhIY": {"duration": 229, "path": "khan/math/pre-algebra/measurement/area-basics/area-of-rectangles-and-the-distributive-property/", "keywords": "", "id": "Q3wfb0CPhIY", "title": "Area of rectangles and the distributive property", "description": "Use the distributive property to find area of rectangles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q3wfb0CPhIY.mp4/Q3wfb0CPhIY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q3wfb0CPhIY.mp4/Q3wfb0CPhIY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q3wfb0CPhIY.m3u8/Q3wfb0CPhIY.m3u8"}, "slug": "area-of-rectangles-and-the-distributive-property", "video_id": "Q3wfb0CPhIY", "youtube_id": "Q3wfb0CPhIY", "readable_id": "area-of-rectangles-and-the-distributive-property"}, "rEiLOB4FulY": {"duration": 591, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/investment-vs-consumption-1/", "keywords": "investment, consumption, speculation", "id": "rEiLOB4FulY", "title": "Investment vs. consumption 1", "description": "The difference between investment and consumption.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rEiLOB4FulY.mp4/rEiLOB4FulY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rEiLOB4FulY.mp4/rEiLOB4FulY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rEiLOB4FulY.m3u8/rEiLOB4FulY.m3u8"}, "slug": "investment-vs-consumption-1", "video_id": "rEiLOB4FulY", "youtube_id": "rEiLOB4FulY", "readable_id": "investment-vs-consumption-1"}, "0Z63Mv8hGnU": {"duration": 340, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-15/", "keywords": "", "id": "0Z63Mv8hGnU", "title": "15 Possible values for expression", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0Z63Mv8hGnU.mp4/0Z63Mv8hGnU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0Z63Mv8hGnU.mp4/0Z63Mv8hGnU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0Z63Mv8hGnU.m3u8/0Z63Mv8hGnU.m3u8"}, "slug": "sat-getting-ready-2-15", "video_id": "0Z63Mv8hGnU", "youtube_id": "0Z63Mv8hGnU", "readable_id": "sat-getting-ready-2-15"}, "cNaonU-UFcY": {"duration": 499, "path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/what-is-tourettes/", "keywords": "Tourette Syndrome (Disease Or Medical Condition),Health (Industry)", "id": "cNaonU-UFcY", "title": "What is Tourette's?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cNaonU-UFcY.mp4/cNaonU-UFcY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cNaonU-UFcY.mp4/cNaonU-UFcY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cNaonU-UFcY.m3u8/cNaonU-UFcY.m3u8"}, "slug": "what-is-tourettes", "video_id": "cNaonU-UFcY", "youtube_id": "cNaonU-UFcY", "readable_id": "what-is-tourettes"}, "Pfg9FY1Fguc": {"duration": 334, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/heart-attack-myocardial-infarct-medications/", "keywords": "", "id": "Pfg9FY1Fguc", "title": "Heart attack (myocardial infarct) medications", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Pfg9FY1Fguc.mp4/Pfg9FY1Fguc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Pfg9FY1Fguc.mp4/Pfg9FY1Fguc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Pfg9FY1Fguc.m3u8/Pfg9FY1Fguc.m3u8"}, "slug": "heart-attack-myocardial-infarct-medications", "video_id": "Pfg9FY1Fguc", "youtube_id": "Pfg9FY1Fguc", "readable_id": "heart-attack-myocardial-infarct-medications"}, "FnrqBgot3jM": {"duration": 183, "path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphing-linear-inequalities-in-two-variables-example-2/", "keywords": "U05, L2, T1, WE2, Graphing, Linear, Inequalities, in, Two, Variables, CC_39336_A-REI_10, CC_39336_A-REI_12", "id": "FnrqBgot3jM", "title": "How to graph a two-variable linear inequality (example)", "description": "Sal graphs the inequality y<3x+5.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FnrqBgot3jM.mp4/FnrqBgot3jM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FnrqBgot3jM.mp4/FnrqBgot3jM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FnrqBgot3jM.m3u8/FnrqBgot3jM.m3u8"}, "slug": "graphing-linear-inequalities-in-two-variables-example-2", "video_id": "FnrqBgot3jM", "youtube_id": "FnrqBgot3jM", "readable_id": "graphing-linear-inequalities-in-two-variables-example-2"}, "VtSjcxdmboM": {"duration": 278, "path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/modern-veneration/", "keywords": "", "id": "VtSjcxdmboM", "title": "A look at modern veneration from the British Museum", "description": "An exploration of how veneration is still very much in evidence today -- and not always in expected places. Celebrity bodies, for instance, are revered in the global cultures of the 21st century, similar in many ways to the veneration of holy individuals in medieval Europe.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VtSjcxdmboM.mp4/VtSjcxdmboM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VtSjcxdmboM.mp4/VtSjcxdmboM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VtSjcxdmboM.m3u8/VtSjcxdmboM.m3u8"}, "slug": "modern-veneration", "video_id": "VtSjcxdmboM", "youtube_id": "VtSjcxdmboM", "readable_id": "modern-veneration"}, "vKRMWewGE9A": {"duration": 253, "path": "khan/computing/computer-science/cryptography/crypt/perfect-secrecy/", "keywords": "perfect secrecy, claude shannon, encryption, random, cryptography", "id": "vKRMWewGE9A", "title": "Perfect secrecy", "description": "Claude Shannon's idea of perfect secrecy: no amount of computational power can help improve your ability to break the one-time pad", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vKRMWewGE9A.mp4/vKRMWewGE9A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vKRMWewGE9A.mp4/vKRMWewGE9A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vKRMWewGE9A.m3u8/vKRMWewGE9A.m3u8"}, "slug": "perfect-secrecy", "video_id": "vKRMWewGE9A", "youtube_id": "vKRMWewGE9A", "readable_id": "perfect-secrecy"}, "FDJ4D78pcbg": {"duration": 634, "path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/escrow/", "keywords": "", "id": "FDJ4D78pcbg", "title": "Escrow", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FDJ4D78pcbg.mp4/FDJ4D78pcbg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FDJ4D78pcbg.mp4/FDJ4D78pcbg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FDJ4D78pcbg.m3u8/FDJ4D78pcbg.m3u8"}, "slug": "escrow", "video_id": "FDJ4D78pcbg", "youtube_id": "FDJ4D78pcbg", "readable_id": "escrow"}, "VouATo5Cg04": {"duration": 178, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p12-harder/", "keywords": "", "id": "VouATo5Cg04", "title": "Nonlinear equation graphs \u2014 Harder example", "description": "Watch Sal work through a harder Nonlinear equation graphs problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VouATo5Cg04.mp4/VouATo5Cg04.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VouATo5Cg04.mp4/VouATo5Cg04.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VouATo5Cg04.m3u8/VouATo5Cg04.m3u8"}, "slug": "sat-math-p12-harder", "video_id": "VouATo5Cg04", "youtube_id": "VouATo5Cg04", "readable_id": "sat-math-p12-harder"}, "kc_HjPT4NKo": {"duration": 255, "path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/quantitative-easing/", "keywords": "federal, reserve, yield, banking", "id": "kc_HjPT4NKo", "title": "Quantitative easing", "description": "Overview of quantitative easing", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kc_HjPT4NKo.mp4/kc_HjPT4NKo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kc_HjPT4NKo.mp4/kc_HjPT4NKo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kc_HjPT4NKo.m3u8/kc_HjPT4NKo.m3u8"}, "slug": "quantitative-easing", "video_id": "kc_HjPT4NKo", "youtube_id": "kc_HjPT4NKo", "readable_id": "quantitative-easing"}, "Ruc8u1UyL7s": {"duration": 50, "path": "khan/humanities/ancient-art-civilizations/greek-art/beginners-guide-greece/diadoumenos/", "keywords": "olympics, ancient greece,", "id": "Ruc8u1UyL7s", "title": "Victorious athlete: The Vaison Daidoumenos", "description": "Roman version of a Greek bronze original of about 440\u2013430 BC, found at Vaison, France.\nKnown as the Daidoumenos (ribbon wearer) this statue shows a triumphant athlete tying a ribbon round his head immediately after a victory. \u00a0Winners in the ancient Olympics were allowed to set up statues of themselves at Olympia. If they won three times they could set up specially commissioned portrait statues which could cost up to ten times the average yearly wage.\n\n\u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ruc8u1UyL7s.mp4/Ruc8u1UyL7s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ruc8u1UyL7s.mp4/Ruc8u1UyL7s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ruc8u1UyL7s.m3u8/Ruc8u1UyL7s.m3u8"}, "slug": "diadoumenos", "video_id": "Ruc8u1UyL7s", "youtube_id": "Ruc8u1UyL7s", "readable_id": "diadoumenos"}, "C38B33ZywWs": {"duration": 555, "path": "khan/math/pre-algebra/negatives-absolute-value-pre-alg/add-subtract-negatives-pre-alg/adding-subtracting-negative-numbers/", "keywords": "Math, negative, numbers, CC_7_NS_1_c", "id": "C38B33ZywWs", "title": "Adding/subtracting negative numbers", "description": "Adding and subtracting negative numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C38B33ZywWs.mp4/C38B33ZywWs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C38B33ZywWs.mp4/C38B33ZywWs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C38B33ZywWs.m3u8/C38B33ZywWs.m3u8"}, "slug": "adding-subtracting-negative-numbers", "video_id": "C38B33ZywWs", "youtube_id": "C38B33ZywWs", "readable_id": "adding-subtracting-negative-numbers"}, "vny1qUaToHw": {"duration": 558, "path": "khan/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/first-law-of-thermodynamics-introduction/", "keywords": "education,online learning,learning,lessons,First law of thermodynamics,energy", "id": "vny1qUaToHw", "title": "First Law of Thermodynamics introduction", "description": "The First Law of Thermodynamics: energy cannot be created or destroyed. It can only be transferred or converted from one form to another.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vny1qUaToHw.mp4/vny1qUaToHw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vny1qUaToHw.mp4/vny1qUaToHw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vny1qUaToHw.m3u8/vny1qUaToHw.m3u8"}, "slug": "first-law-of-thermodynamics-introduction", "video_id": "vny1qUaToHw", "youtube_id": "vny1qUaToHw", "readable_id": "first-law-of-thermodynamics-introduction"}, "KvvFTPsZxU4": {"duration": 291, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/alternate-sum-of-n-squares-formula/", "keywords": "", "id": "KvvFTPsZxU4", "title": "Alternate formula for sum of n squares", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KvvFTPsZxU4.mp4/KvvFTPsZxU4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KvvFTPsZxU4.mp4/KvvFTPsZxU4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KvvFTPsZxU4.m3u8/KvvFTPsZxU4.m3u8"}, "slug": "alternate-sum-of-n-squares-formula", "video_id": "KvvFTPsZxU4", "youtube_id": "KvvFTPsZxU4", "readable_id": "alternate-sum-of-n-squares-formula"}, "AN2DJxMLFOw": {"duration": 236, "path": "khan/humanities/global-culture/identity-body/identity-body-united-states/rockburne-drawing/", "keywords": "", "id": "AN2DJxMLFOw", "title": "Dorothea Rockburne: Drawing Which Makes Itself", "description": "Contemporary artist Dorothea Rockburne talks about mathematics, magic, and materials. To learn about how art changes over time, enroll in one of MoMA's courses online.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AN2DJxMLFOw.mp4/AN2DJxMLFOw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AN2DJxMLFOw.mp4/AN2DJxMLFOw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AN2DJxMLFOw.m3u8/AN2DJxMLFOw.m3u8"}, "slug": "rockburne-drawing", "video_id": "AN2DJxMLFOw", "youtube_id": "AN2DJxMLFOw", "readable_id": "rockburne-drawing"}, "-6XBnjFrWBg": {"duration": 455, "path": "khan/humanities/history/euro-hist/wo/american-progress-in-the-pacific-in-1944/", "keywords": "", "id": "-6XBnjFrWBg", "title": "American progress in the Pacific in 1944", "description": "In 1944, the Americans (and Allies) make even more progress in the Pacific. By the end of the year, they have taken positions that put them within bombing range of Japan.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-6XBnjFrWBg.mp4/-6XBnjFrWBg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-6XBnjFrWBg.mp4/-6XBnjFrWBg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-6XBnjFrWBg.m3u8/-6XBnjFrWBg.m3u8"}, "slug": "american-progress-in-the-pacific-in-1944", "video_id": "-6XBnjFrWBg", "youtube_id": "-6XBnjFrWBg", "readable_id": "american-progress-in-the-pacific-in-1944"}, "x2V_Lz6AWEk": {"duration": 29, "path": "khan/science/discoveries-projects/discoveries/magnetic-fields/tracing-magnetic-field/", "keywords": "magnetic field", "id": "x2V_Lz6AWEk", "title": "Tracing a magnetic field", "description": "A compass will align with the lines of force around a magnet. How could you do this in 3 dimensions?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x2V_Lz6AWEk.mp4/x2V_Lz6AWEk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x2V_Lz6AWEk.mp4/x2V_Lz6AWEk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x2V_Lz6AWEk.m3u8/x2V_Lz6AWEk.m3u8"}, "slug": "tracing-magnetic-field", "video_id": "x2V_Lz6AWEk", "youtube_id": "x2V_Lz6AWEk", "readable_id": "tracing-magnetic-field"}, "l5TsKWd-fO8": {"duration": 273, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/what-is-hypertension-2/", "keywords": "Hypertension (Disease Or Medical Condition),Health (Industry)", "id": "l5TsKWd-fO8", "title": "What is hypertension", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/l5TsKWd-fO8.mp4/l5TsKWd-fO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/l5TsKWd-fO8.mp4/l5TsKWd-fO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/l5TsKWd-fO8.m3u8/l5TsKWd-fO8.m3u8"}, "slug": "what-is-hypertension-2", "video_id": "l5TsKWd-fO8", "youtube_id": "l5TsKWd-fO8", "readable_id": "what-is-hypertension-2"}, "ftndEjAg6qs": {"duration": 136, "path": "khan/math/arithmetic/telling-time-topic/telling-time/telling-time-exercise-example-2/", "keywords": "", "id": "ftndEjAg6qs", "title": "Telling time exercise example 2", "description": "Tell time on unlabeled analog clocks.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ftndEjAg6qs.mp4/ftndEjAg6qs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ftndEjAg6qs.mp4/ftndEjAg6qs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ftndEjAg6qs.m3u8/ftndEjAg6qs.m3u8"}, "slug": "telling-time-exercise-example-2", "video_id": "ftndEjAg6qs", "youtube_id": "ftndEjAg6qs", "readable_id": "telling-time-exercise-example-2"}, "Zqt3btS1FwE": {"duration": 558, "path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/photon-energy/", "keywords": "", "id": "Zqt3btS1FwE", "title": "Photon Energy E=hf", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zqt3btS1FwE.mp4/Zqt3btS1FwE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zqt3btS1FwE.mp4/Zqt3btS1FwE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zqt3btS1FwE.m3u8/Zqt3btS1FwE.m3u8"}, "slug": "photon-energy", "video_id": "Zqt3btS1FwE", "youtube_id": "Zqt3btS1FwE", "readable_id": "photon-energy"}, "WNZf4ip_R9s": {"duration": 396, "path": "khan/test-prep/mcat/biomolecules/dna/differences-in-translation-between-prokaryotes-and-eukaryotes/", "keywords": "", "id": "WNZf4ip_R9s", "title": "Differences in translation between prokaryotes and eukaryotes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WNZf4ip_R9s.mp4/WNZf4ip_R9s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WNZf4ip_R9s.mp4/WNZf4ip_R9s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WNZf4ip_R9s.m3u8/WNZf4ip_R9s.m3u8"}, "slug": "differences-in-translation-between-prokaryotes-and-eukaryotes", "video_id": "WNZf4ip_R9s", "youtube_id": "WNZf4ip_R9s", "readable_id": "differences-in-translation-between-prokaryotes-and-eukaryotes"}, "ucqaqTR6EK8": {"duration": 718, "path": "khan/test-prep/gmat/problem-solving/gmat-math-26/", "keywords": "GMAT, Math, problem, solving", "id": "ucqaqTR6EK8", "title": "GMAT: Math 26", "description": "133-137, pg. 170", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ucqaqTR6EK8.mp4/ucqaqTR6EK8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ucqaqTR6EK8.mp4/ucqaqTR6EK8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ucqaqTR6EK8.m3u8/ucqaqTR6EK8.m3u8"}, "slug": "gmat-math-26", "video_id": "ucqaqTR6EK8", "youtube_id": "ucqaqTR6EK8", "readable_id": "gmat-math-26"}, "VIVIegSt81k": {"duration": 248, "path": "khan/math/recreational-math/vi-hart/hexaflexagons/hexaflexagons/", "keywords": "", "id": "VIVIegSt81k", "title": "Hexaflexagons", "description": "Hooraaaay flexagons! Next hexaflexagon video in one week. Happy October!More info coming soon.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VIVIegSt81k.mp4/VIVIegSt81k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VIVIegSt81k.mp4/VIVIegSt81k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VIVIegSt81k.m3u8/VIVIegSt81k.m3u8"}, "slug": "hexaflexagons", "video_id": "VIVIegSt81k", "youtube_id": "VIVIegSt81k", "readable_id": "hexaflexagons"}, "2dbasvm3iG0": {"duration": 428, "path": "khan/math/pre-algebra/fractions-pre-alg/comparing-fractions-pre-alg/comparing-fractions-2/", "keywords": "u2_l1_t5_we2, Comparing, Fractions, CC_3_NF_3, CC_3_NF_3_a, CC_3_NF_3_b, CC_6_NS_4", "id": "2dbasvm3iG0", "title": "Comparing fractions with different denominators", "description": "Need help comparing fractions? Try simplifying them first then finding a common denominator. The result are two fractions you can really compare.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2dbasvm3iG0.mp4/2dbasvm3iG0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2dbasvm3iG0.mp4/2dbasvm3iG0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2dbasvm3iG0.m3u8/2dbasvm3iG0.m3u8"}, "slug": "comparing-fractions-2", "video_id": "2dbasvm3iG0", "youtube_id": "2dbasvm3iG0", "readable_id": "comparing-fractions-2"}, "-6hoDNZoV5g": {"duration": 669, "path": "khan/partner-content/wi-phi/metaphys-epistemology/meaning-and-language/", "keywords": "", "id": "-6hoDNZoV5g", "title": "Language: Meaning and Language", "description": "Kate\u00a0explores the connection between language and meaning. This video introduces two ways in which philosophers have answered the question 'what makes a sound or some marks meaningful?'.\u00a0\n\nSpeaker: Dr. Kate Ritche, \u00a0Assistant Professor of Philosophy, City College of New York", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-6hoDNZoV5g.mp4/-6hoDNZoV5g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-6hoDNZoV5g.mp4/-6hoDNZoV5g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-6hoDNZoV5g.m3u8/-6hoDNZoV5g.m3u8"}, "slug": "meaning-and-language", "video_id": "-6hoDNZoV5g", "youtube_id": "-6hoDNZoV5g", "readable_id": "meaning-and-language"}, "yOAlbFVKGfk": {"duration": 300, "path": "khan/humanities/art-1010/wwi-dada/dada1/marcel-duchamp-boite-en-valise-the-red-box-series-f-1960/", "keywords": "art history, duchamp, ready-mades, ready-made, dada, Smarthistory", "id": "yOAlbFVKGfk", "title": "Duchamp, Boite-en-valise (the red box), series F", "description": "Marcel Duchamp, Boite-en-valise (the red box), series F, 1960 (Portland Art Museum) Speakers: Bruce Guenther, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yOAlbFVKGfk.mp4/yOAlbFVKGfk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yOAlbFVKGfk.mp4/yOAlbFVKGfk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yOAlbFVKGfk.m3u8/yOAlbFVKGfk.m3u8"}, "slug": "marcel-duchamp-boite-en-valise-the-red-box-series-f-1960", "video_id": "yOAlbFVKGfk", "youtube_id": "yOAlbFVKGfk", "readable_id": "marcel-duchamp-boite-en-valise-the-red-box-series-f-1960"}, "IKRT-boQTr0": {"duration": 624, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/pregnancy-physiology-i/", "keywords": "", "id": "IKRT-boQTr0", "title": "Pregnancy physiology I", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IKRT-boQTr0.mp4/IKRT-boQTr0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IKRT-boQTr0.mp4/IKRT-boQTr0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IKRT-boQTr0.m3u8/IKRT-boQTr0.m3u8"}, "slug": "pregnancy-physiology-i", "video_id": "IKRT-boQTr0", "youtube_id": "IKRT-boQTr0", "readable_id": "pregnancy-physiology-i"}, "TKI1DaquKnI": {"duration": 252, "path": "khan/partner-content/big-history-project/early-humans/how-did-first-humans-live/bhp-from-foraging-to-food-shopping/", "keywords": "", "id": "TKI1DaquKnI", "title": "From Foraging to Food Shopping", "description": "What was it like for hunter-gathers? What were their favorite foods that they would go the extra mile to get their hands on? How are decisions like that different from the decisions we make today?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TKI1DaquKnI.mp4/TKI1DaquKnI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TKI1DaquKnI.mp4/TKI1DaquKnI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TKI1DaquKnI.m3u8/TKI1DaquKnI.m3u8"}, "slug": "bhp-from-foraging-to-food-shopping", "video_id": "TKI1DaquKnI", "youtube_id": "TKI1DaquKnI", "readable_id": "bhp-from-foraging-to-food-shopping"}, "leDYnoNSvD4": {"duration": 73, "path": "khan/math/early-math/cc-early-math-counting-topic/cc-early-math-count-object-topic/counting-in-scenes/", "keywords": "", "id": "leDYnoNSvD4", "title": "Counting in pictures", "description": "Learn how to count the number of objects you see in pictures.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/leDYnoNSvD4.mp4/leDYnoNSvD4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/leDYnoNSvD4.mp4/leDYnoNSvD4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/leDYnoNSvD4.m3u8/leDYnoNSvD4.m3u8"}, "slug": "counting-in-scenes", "video_id": "leDYnoNSvD4", "youtube_id": "leDYnoNSvD4", "readable_id": "counting-in-scenes"}, "peQsBg9P4ms": {"duration": 668, "path": "khan/science/organic-chemistry/stereochemistry-topic/optical-activity/r-s-cahn-ingold-prelog-naming-system-example-2/", "keywords": "R, S Cahn Ingold Prelog Naming System Example 2", "id": "peQsBg9P4ms", "title": "R,S (Cahn-Ingold-Prelog) naming system example 2", "description": "R,S (Cahn-Ingold-Prelog) Naming System Example 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/peQsBg9P4ms.mp4/peQsBg9P4ms.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/peQsBg9P4ms.mp4/peQsBg9P4ms.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/peQsBg9P4ms.m3u8/peQsBg9P4ms.m3u8"}, "slug": "r-s-cahn-ingold-prelog-naming-system-example-2", "video_id": "peQsBg9P4ms", "youtube_id": "peQsBg9P4ms", "readable_id": "r-s-cahn-ingold-prelog-naming-system-example-2"}, "O3jvUZ8wvZs": {"duration": 422, "path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/we-converting-degrees-to-radians/", "keywords": "radians, degrees", "id": "O3jvUZ8wvZs", "title": "Example: Converting degrees to radians", "description": "Worked example to help understand how we convert radians to degrees", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O3jvUZ8wvZs.mp4/O3jvUZ8wvZs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O3jvUZ8wvZs.mp4/O3jvUZ8wvZs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O3jvUZ8wvZs.m3u8/O3jvUZ8wvZs.m3u8"}, "slug": "we-converting-degrees-to-radians", "video_id": "O3jvUZ8wvZs", "youtube_id": "O3jvUZ8wvZs", "readable_id": "we-converting-degrees-to-radians"}, "TJgBEI3drUc": {"duration": 826, "path": "khan/math/differential-equations/laplace-transform/convolution-integral/the-convolution-and-the-laplace-transform/", "keywords": "convolution, laplace, differential, equations", "id": "TJgBEI3drUc", "title": "The convolution and the laplace transform", "description": "Understanding how the product of the Transforms of two functions relates to their convolution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TJgBEI3drUc.mp4/TJgBEI3drUc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TJgBEI3drUc.mp4/TJgBEI3drUc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TJgBEI3drUc.m3u8/TJgBEI3drUc.m3u8"}, "slug": "the-convolution-and-the-laplace-transform", "video_id": "TJgBEI3drUc", "youtube_id": "TJgBEI3drUc", "readable_id": "the-convolution-and-the-laplace-transform"}, "vuGpUFjLaYE": {"duration": 624, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/photoelectric-effect/", "keywords": "", "id": "vuGpUFjLaYE", "title": "Photoelectric effect", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vuGpUFjLaYE.mp4/vuGpUFjLaYE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vuGpUFjLaYE.mp4/vuGpUFjLaYE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vuGpUFjLaYE.m3u8/vuGpUFjLaYE.m3u8"}, "slug": "photoelectric-effect", "video_id": "vuGpUFjLaYE", "youtube_id": "vuGpUFjLaYE", "readable_id": "photoelectric-effect"}, "lR8yK_aKb2Q": {"duration": 110, "path": "khan/humanities/art-history-basics/artists-materials-techniques/printmaking/moma-relief-printmaking/", "keywords": "", "id": "lR8yK_aKb2Q", "title": "Introduction to relief printmaking", "description": "Discover how artists create different effects with linocuts and woodcuts. Did you know that MoMA offers studio courses online? Check out the list of offerings including online courses on collage and painting techniques.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lR8yK_aKb2Q.mp4/lR8yK_aKb2Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lR8yK_aKb2Q.mp4/lR8yK_aKb2Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lR8yK_aKb2Q.m3u8/lR8yK_aKb2Q.m3u8"}, "slug": "moma-relief-printmaking", "video_id": "lR8yK_aKb2Q", "youtube_id": "lR8yK_aKb2Q", "readable_id": "moma-relief-printmaking"}, "uKu566g3j7g": {"duration": 559, "path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/fatty-acid-oxidation-part-i/", "keywords": "", "id": "uKu566g3j7g", "title": "Fatty Acid Oxidation - Part I", "description": "1D: What are the three phases required for fatty acid oxidation? Where in the cell do these reactions take place? How is this process regulated?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uKu566g3j7g.mp4/uKu566g3j7g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uKu566g3j7g.mp4/uKu566g3j7g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uKu566g3j7g.m3u8/uKu566g3j7g.m3u8"}, "slug": "fatty-acid-oxidation-part-i", "video_id": "uKu566g3j7g", "youtube_id": "uKu566g3j7g", "readable_id": "fatty-acid-oxidation-part-i"}, "0mOH-qNGM7M": {"duration": 512, "path": "khan/math/pre-algebra/decimals-pre-alg/adding-decimals-pre-alg/subtracting-decimals-old/", "keywords": "subtraction, decimals, math, CC_5_NBT_7, CC_6_NS_3", "id": "0mOH-qNGM7M", "title": "Subtracting decimals (old)", "description": "Subtracting decimal numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0mOH-qNGM7M.mp4/0mOH-qNGM7M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0mOH-qNGM7M.mp4/0mOH-qNGM7M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0mOH-qNGM7M.m3u8/0mOH-qNGM7M.m3u8"}, "slug": "subtracting-decimals-old", "video_id": "0mOH-qNGM7M", "youtube_id": "0mOH-qNGM7M", "readable_id": "subtracting-decimals-old"}, "HO1dsNrzE58": {"duration": 617, "path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-of-a-strong-acid-with-a-strong-base-continued/", "keywords": "", "id": "HO1dsNrzE58", "title": "Titration of a strong acid with a strong base (continued)", "description": "Calculating the pH at and after the equivalence point for titration of strong acid, hydrochloric acid, with strong base, NaOH.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HO1dsNrzE58.mp4/HO1dsNrzE58.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HO1dsNrzE58.mp4/HO1dsNrzE58.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HO1dsNrzE58.m3u8/HO1dsNrzE58.m3u8"}, "slug": "titration-of-a-strong-acid-with-a-strong-base-continued", "video_id": "HO1dsNrzE58", "youtube_id": "HO1dsNrzE58", "readable_id": "titration-of-a-strong-acid-with-a-strong-base-continued"}, "tjGGxA7AF9E": {"duration": 464, "path": "khan/science/health-and-medicine/infectious-diseases/influenza/flu-shift-and-drift/", "keywords": "", "id": "tjGGxA7AF9E", "title": "Flu shift and drift", "description": "Learn how Type B Influenza virus has genetic drift, whereas Type A Influenza virus has genetic drift AND shift. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tjGGxA7AF9E.mp4/tjGGxA7AF9E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tjGGxA7AF9E.mp4/tjGGxA7AF9E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tjGGxA7AF9E.m3u8/tjGGxA7AF9E.m3u8"}, "slug": "flu-shift-and-drift", "video_id": "tjGGxA7AF9E", "youtube_id": "tjGGxA7AF9E", "readable_id": "flu-shift-and-drift"}, "RRGwdfQV8kU": {"duration": 241, "path": "khan/test-prep/mcat/processing-the-environment/language/theories-of-language-development/", "keywords": "language, nativist, learning, interactionist", "id": "RRGwdfQV8kU", "title": "Theories of language development: Nativist, learning, interactionist", "description": "Learn about the nativist, learning, and interactionist theories of human language development. By Carole Yue.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RRGwdfQV8kU.mp4/RRGwdfQV8kU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RRGwdfQV8kU.mp4/RRGwdfQV8kU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RRGwdfQV8kU.m3u8/RRGwdfQV8kU.m3u8"}, "slug": "theories-of-language-development", "video_id": "RRGwdfQV8kU", "youtube_id": "RRGwdfQV8kU", "readable_id": "theories-of-language-development"}, "6g3DPg2HqGw": {"duration": 764, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-circle-hyperbola-intersection/", "keywords": "2010, IIT, JEE, Paper, Problem, 46, Circle, Hyperbola, Intersection", "id": "6g3DPg2HqGw", "title": "IIT JEE circle hyperbola intersection", "description": "2010 IIT JEE Paper 1 Problem 46 Circle Hyperbola Intersection", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6g3DPg2HqGw.mp4/6g3DPg2HqGw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6g3DPg2HqGw.mp4/6g3DPg2HqGw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6g3DPg2HqGw.m3u8/6g3DPg2HqGw.m3u8"}, "slug": "iit-jee-circle-hyperbola-intersection", "video_id": "6g3DPg2HqGw", "youtube_id": "6g3DPg2HqGw", "readable_id": "iit-jee-circle-hyperbola-intersection"}, "bGpw7NeXyBc": {"duration": 565, "path": "khan/test-prep/mcat/behavior/learning-slug/operant-conditioning-innate-vs-learned-behaviors/", "keywords": "", "id": "bGpw7NeXyBc", "title": "Operant conditioning: Innate vs learned behaviors", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bGpw7NeXyBc.mp4/bGpw7NeXyBc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bGpw7NeXyBc.mp4/bGpw7NeXyBc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bGpw7NeXyBc.m3u8/bGpw7NeXyBc.m3u8"}, "slug": "operant-conditioning-innate-vs-learned-behaviors", "video_id": "bGpw7NeXyBc", "youtube_id": "bGpw7NeXyBc", "readable_id": "operant-conditioning-innate-vs-learned-behaviors"}, "n_npNIK1kMc": {"duration": 645, "path": "khan/test-prep/mcat/physical-processes/magnetism-mcat/magnetism-part-1/", "keywords": "", "id": "n_npNIK1kMc", "title": "Magnetism - Part 1", "description": "Introduction to magnetism: lodestones; like poles repel, opposite poles attract; no magnetic monopoles; magnetic spin.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n_npNIK1kMc.mp4/n_npNIK1kMc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n_npNIK1kMc.mp4/n_npNIK1kMc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n_npNIK1kMc.m3u8/n_npNIK1kMc.m3u8"}, "slug": "magnetism-part-1", "video_id": "n_npNIK1kMc", "youtube_id": "n_npNIK1kMc", "readable_id": "magnetism-part-1"}, "F9SMvVtKxXM": {"duration": 146, "path": "khan/humanities/art-asia/imperial-china/ming-dynasty/eternity/", "keywords": "nature, painting, paper, transcendence, Asia", "id": "F9SMvVtKxXM", "title": "Congyi, Cloudy Mountains", "description": "Met curator Maxwell K. Hearn on emptiness in Fang Congyi\u2019s Cloudy Mountains,\u00a0second half of 14th century.\n\nFang Congyi, a Daoist priest from Jiangxi, traveled extensively in the north before settling down at the seat of the Orthodox Unity Daoist church, the Shangqing Temple on Mount Longhu (Dragon Tiger Mountain), Jiangxi province. Imbued with Daoist mysticism, he painted landscapes that \"turned the shapeless into shapes and returned things that have shapes to the shapeless.\"\n\nAccording to Daoist geomantic beliefs, a powerful life energy pulsates through mountain ranges and watercourses in patterns known as longmo (dragon veins). In Cloudy Mountains, the painter's kinetic brushwork, wound up as if in a whirlwind, charges the mountains with an expressive liveliness that defies their physical structure. The great mountain range, weightless and dematerialized, resembles a dragon ascending into the clouds.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit \"Find an Educator Resource.\u201d", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F9SMvVtKxXM.mp4/F9SMvVtKxXM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F9SMvVtKxXM.mp4/F9SMvVtKxXM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F9SMvVtKxXM.m3u8/F9SMvVtKxXM.m3u8"}, "slug": "eternity", "video_id": "F9SMvVtKxXM", "youtube_id": "F9SMvVtKxXM", "readable_id": "eternity"}, "PEeUTQ0Gri8": {"duration": 118, "path": "khan/math/early-math/cc-early-math-counting-topic/cc-early-math-counting/counting-in-order/", "keywords": "", "id": "PEeUTQ0Gri8", "title": "Counting in order", "description": "Learn how to count without making mistakes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PEeUTQ0Gri8.mp4/PEeUTQ0Gri8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PEeUTQ0Gri8.mp4/PEeUTQ0Gri8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PEeUTQ0Gri8.m3u8/PEeUTQ0Gri8.m3u8"}, "slug": "counting-in-order", "video_id": "PEeUTQ0Gri8", "youtube_id": "PEeUTQ0Gri8", "readable_id": "counting-in-order"}, "q8cYGh-K6Ok": {"duration": 309, "path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/gossaert-saint-luke-painting-the-madonna/", "keywords": "art history, smarthistory, Gossaert, Northern Renaissance, Protestant Reformation,", "id": "q8cYGh-K6Ok", "title": "Gossaert, Saint Luke Painting the Madonna", "description": "Jan Gossaert, Saint Luke Painting the Madonna, c. 1515-25 (Kunsthistorisches Museum, Vienna) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q8cYGh-K6Ok.mp4/q8cYGh-K6Ok.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q8cYGh-K6Ok.mp4/q8cYGh-K6Ok.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q8cYGh-K6Ok.m3u8/q8cYGh-K6Ok.m3u8"}, "slug": "gossaert-saint-luke-painting-the-madonna", "video_id": "q8cYGh-K6Ok", "youtube_id": "q8cYGh-K6Ok", "readable_id": "gossaert-saint-luke-painting-the-madonna"}, "wHPGFPIcILM": {"duration": 445, "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/consumption-function/consumption-function-with-income-dependent-taxes/", "keywords": "macroeconomics", "id": "wHPGFPIcILM", "title": "Consumption function with income dependent taxes", "description": "Thinking about a consumption function where taxes are also a function of income (which is more realistic than constant taxes)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wHPGFPIcILM.mp4/wHPGFPIcILM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wHPGFPIcILM.mp4/wHPGFPIcILM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wHPGFPIcILM.m3u8/wHPGFPIcILM.m3u8"}, "slug": "consumption-function-with-income-dependent-taxes", "video_id": "wHPGFPIcILM", "youtube_id": "wHPGFPIcILM", "readable_id": "consumption-function-with-income-dependent-taxes"}, "8HlVy__J8XA": {"duration": 395, "path": "khan/science/biology/membranes-and-transport/passive-transport/facilitated-diffusion/", "keywords": "education,online learning,learning,lessons,facilitated diffusion,diffusion,channel protein,carrier protein", "id": "8HlVy__J8XA", "title": "Facilitated diffusion", "description": "Understanding how channel proteins and carrier proteins can facilitate diffusion across a cell membrane (passive transport).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8HlVy__J8XA.mp4/8HlVy__J8XA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8HlVy__J8XA.mp4/8HlVy__J8XA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8HlVy__J8XA.m3u8/8HlVy__J8XA.m3u8"}, "slug": "facilitated-diffusion", "video_id": "8HlVy__J8XA", "youtube_id": "8HlVy__J8XA", "readable_id": "facilitated-diffusion"}, "SYkmadc2wOI": {"duration": 316, "path": "khan/math/pre-algebra/rates-and-ratios/metric-system-tutorial/conversion-between-metric-units/", "keywords": "U06_L2_T1_we2, Conversion, between, metric, units, CC_4_MD_1, CC_5_MD_1, CC_6_RP_3_d", "id": "SYkmadc2wOI", "title": "Conversion between metric units", "description": "Conversion between metric units", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SYkmadc2wOI.mp4/SYkmadc2wOI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SYkmadc2wOI.mp4/SYkmadc2wOI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SYkmadc2wOI.m3u8/SYkmadc2wOI.m3u8"}, "slug": "conversion-between-metric-units", "video_id": "SYkmadc2wOI", "youtube_id": "SYkmadc2wOI", "readable_id": "conversion-between-metric-units"}, "pmagWO-kQ0M": {"duration": 398, "path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/surface-tension-and-adhesion/", "keywords": "", "id": "pmagWO-kQ0M", "title": "Surface Tension and Adhesion", "description": "David explains the concepts of surface tension, cohesion, and adhesion.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pmagWO-kQ0M.mp4/pmagWO-kQ0M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pmagWO-kQ0M.mp4/pmagWO-kQ0M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pmagWO-kQ0M.m3u8/pmagWO-kQ0M.m3u8"}, "slug": "surface-tension-and-adhesion", "video_id": "pmagWO-kQ0M", "youtube_id": "pmagWO-kQ0M", "readable_id": "surface-tension-and-adhesion"}, "YMzNkNoFzG4": {"duration": 277, "path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/evolutionary-game-theory/", "keywords": "", "id": "YMzNkNoFzG4", "title": "Evolutionary game theory", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YMzNkNoFzG4.mp4/YMzNkNoFzG4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YMzNkNoFzG4.mp4/YMzNkNoFzG4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YMzNkNoFzG4.m3u8/YMzNkNoFzG4.m3u8"}, "slug": "evolutionary-game-theory", "video_id": "YMzNkNoFzG4", "youtube_id": "YMzNkNoFzG4", "readable_id": "evolutionary-game-theory"}, "UFRAHIvCtzg": {"duration": 166, "path": "khan/math/geometry/transformations/hs-geo-rotations/defining-rotation-example/", "keywords": "", "id": "UFRAHIvCtzg", "title": "How to find the angle of the rotation that maps a given figure to another (example)", "description": "Sal is given two pairs of line segments and a center of a dilation. He finds the angle for the rotation that maps one pair of segments to another.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UFRAHIvCtzg.mp4/UFRAHIvCtzg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UFRAHIvCtzg.mp4/UFRAHIvCtzg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UFRAHIvCtzg.m3u8/UFRAHIvCtzg.m3u8"}, "slug": "defining-rotation-example", "video_id": "UFRAHIvCtzg", "youtube_id": "UFRAHIvCtzg", "readable_id": "defining-rotation-example"}, "o_vMb655dFk": {"duration": 268, "path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/calculus-bc-2008-2d/", "keywords": "calculus", "id": "o_vMb655dFk", "title": "Calculus BC 2008 2d", "description": "Part 2d of the 2008 Calculus BC exam free-response section", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o_vMb655dFk.mp4/o_vMb655dFk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o_vMb655dFk.mp4/o_vMb655dFk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o_vMb655dFk.m3u8/o_vMb655dFk.m3u8"}, "slug": "calculus-bc-2008-2d", "video_id": "o_vMb655dFk", "youtube_id": "o_vMb655dFk", "readable_id": "calculus-bc-2008-2d"}, "W74G5sNJMuA": {"duration": 706, "path": "khan/humanities/history/crashcourse-worldhistory/so-thats-where-that-comes-from-2/crash-course-world-history-07/", "keywords": "crash course", "id": "W74G5sNJMuA", "title": "2000 Years of Chinese History! The Mandate of Heaven and Confucius", "description": "In which John introduces you to quite a lot of Chinese history by discussing the complicated relationship between the Confucian scholars who wrote Chinese history and the emperors (and empress) who made it. Included is a brief introduction to all the dynasties in Chinese history and an introduction to Confucius and the Confucian emphasis on filial piety, the role the mandate of heaven played in organizing China, and how China became the first modern state.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W74G5sNJMuA.mp4/W74G5sNJMuA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W74G5sNJMuA.mp4/W74G5sNJMuA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W74G5sNJMuA.m3u8/W74G5sNJMuA.m3u8"}, "slug": "crash-course-world-history-07", "video_id": "W74G5sNJMuA", "youtube_id": "W74G5sNJMuA", "readable_id": "crash-course-world-history-07"}, "t__jNTOwePU": {"duration": 214, "path": "khan/college-admissions/applying-to-college/admissions-essays/avoiding-common-admissions-essay-mistakes/", "keywords": "", "id": "t__jNTOwePU", "title": "Avoiding common admissions essay mistakes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/t__jNTOwePU.mp4/t__jNTOwePU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/t__jNTOwePU.mp4/t__jNTOwePU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/t__jNTOwePU.m3u8/t__jNTOwePU.m3u8"}, "slug": "avoiding-common-admissions-essay-mistakes", "video_id": "t__jNTOwePU", "youtube_id": "t__jNTOwePU", "readable_id": "avoiding-common-admissions-essay-mistakes"}, "RQpBj8ebbNY": {"duration": 705, "path": "khan/test-prep/mcat/organ-systems/hematologic-system/how-do-we-make-blood-clots/", "keywords": "", "id": "RQpBj8ebbNY", "title": "How do we make blood clots?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RQpBj8ebbNY.mp4/RQpBj8ebbNY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RQpBj8ebbNY.mp4/RQpBj8ebbNY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RQpBj8ebbNY.m3u8/RQpBj8ebbNY.m3u8"}, "slug": "how-do-we-make-blood-clots", "video_id": "RQpBj8ebbNY", "youtube_id": "RQpBj8ebbNY", "readable_id": "how-do-we-make-blood-clots"}, "3UiffIzCNPQ": {"duration": 197, "path": "khan/humanities/art-asia/korea-japan/korean-art/guardian-king-of-west/", "keywords": "", "id": "3UiffIzCNPQ", "title": "Guardian King of the West", "description": "In this video, Buddhist monk artists, Seol-min (formerly known as Jae-u) and Myung Chun discuss Korean Buddhist art and paint the Guardian King of the West, which is now in the Asian Art Museum's collection. This video also includes footage from a symbolic eye-opening ceremony, which took place at the museum on December 20, 2003. Learn more about Korean Buddhism.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3UiffIzCNPQ.mp4/3UiffIzCNPQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3UiffIzCNPQ.mp4/3UiffIzCNPQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3UiffIzCNPQ.m3u8/3UiffIzCNPQ.m3u8"}, "slug": "guardian-king-of-west", "video_id": "3UiffIzCNPQ", "youtube_id": "3UiffIzCNPQ", "readable_id": "guardian-king-of-west"}, "S6d5oAS-jUc": {"duration": 191, "path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-framing-christinas-world/", "keywords": "", "id": "S6d5oAS-jUc", "title": "Framing \"Christina's World\" by Andrew Wyeth", "description": "Though we might not notice it, frames affect how we see a painting. To learn about how art changes over time, enroll in one of MoMA's courses online.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S6d5oAS-jUc.mp4/S6d5oAS-jUc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S6d5oAS-jUc.mp4/S6d5oAS-jUc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S6d5oAS-jUc.m3u8/S6d5oAS-jUc.m3u8"}, "slug": "moma-framing-christinas-world", "video_id": "S6d5oAS-jUc", "youtube_id": "S6d5oAS-jUc", "readable_id": "moma-framing-christinas-world"}, "tRuvXP-H164": {"duration": 643, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/avrt-avnrt/", "keywords": "", "id": "tRuvXP-H164", "title": "Atrioventricular reentrant tachycardia (AVRT) & AV nodal reentrant tachycardia (AVNRT)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tRuvXP-H164.mp4/tRuvXP-H164.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tRuvXP-H164.mp4/tRuvXP-H164.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tRuvXP-H164.m3u8/tRuvXP-H164.m3u8"}, "slug": "avrt-avnrt", "video_id": "tRuvXP-H164", "youtube_id": "tRuvXP-H164", "readable_id": "avrt-avnrt"}, "T7j0V1AHvBU": {"duration": 158, "path": "khan/humanities/medieval-world/medieval-europe/chivalry-middle-ages/", "keywords": "", "id": "T7j0V1AHvBU", "title": "Chivalry in the Middle Ages", "description": "Chivalric customs arose from the medieval knight's code of conduct, and were gradually adopted by aristocrats and society as a whole. Learn about the elements of the code and some surprising early applications, as depicted in illuminated manuscripts. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T7j0V1AHvBU.mp4/T7j0V1AHvBU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T7j0V1AHvBU.mp4/T7j0V1AHvBU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T7j0V1AHvBU.m3u8/T7j0V1AHvBU.m3u8"}, "slug": "chivalry-middle-ages", "video_id": "T7j0V1AHvBU", "youtube_id": "T7j0V1AHvBU", "readable_id": "chivalry-middle-ages"}, "ExJC8AoAczE": {"duration": 472, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/septic-shock-diagnosis-and-treatment/", "keywords": "", "id": "ExJC8AoAczE", "title": "Septic shock: Diagnosis and treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ExJC8AoAczE.mp4/ExJC8AoAczE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ExJC8AoAczE.mp4/ExJC8AoAczE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ExJC8AoAczE.m3u8/ExJC8AoAczE.m3u8"}, "slug": "septic-shock-diagnosis-and-treatment", "video_id": "ExJC8AoAczE", "youtube_id": "ExJC8AoAczE", "readable_id": "septic-shock-diagnosis-and-treatment"}, "OZdmaf2R9ys": {"duration": 343, "path": "khan/test-prep/mcat/cells/eukaryotic-cells/lysosomes-and-peroxisomes/", "keywords": "", "id": "OZdmaf2R9ys", "title": "Lysosomes and peroxisomes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OZdmaf2R9ys.mp4/OZdmaf2R9ys.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OZdmaf2R9ys.mp4/OZdmaf2R9ys.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OZdmaf2R9ys.m3u8/OZdmaf2R9ys.m3u8"}, "slug": "lysosomes-and-peroxisomes", "video_id": "OZdmaf2R9ys", "youtube_id": "OZdmaf2R9ys", "readable_id": "lysosomes-and-peroxisomes"}, "uX1RzoE_9BI": {"duration": 612, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/what-is-asthma/", "keywords": "", "id": "uX1RzoE_9BI", "title": "What is asthma?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uX1RzoE_9BI.mp4/uX1RzoE_9BI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uX1RzoE_9BI.mp4/uX1RzoE_9BI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uX1RzoE_9BI.m3u8/uX1RzoE_9BI.m3u8"}, "slug": "what-is-asthma", "video_id": "uX1RzoE_9BI", "youtube_id": "uX1RzoE_9BI", "readable_id": "what-is-asthma"}, "OVM68-0YVWI": {"duration": 209, "path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/co-dominance-and-incomplete-dominance/", "keywords": "", "id": "OVM68-0YVWI", "title": "Co-dominance and Incomplete Dominance", "description": "Come learn about Co-dominance and incomplete dominance and\u00a0\nhow they differ from complete dominance. By Ross Firestone.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OVM68-0YVWI.mp4/OVM68-0YVWI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OVM68-0YVWI.mp4/OVM68-0YVWI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OVM68-0YVWI.m3u8/OVM68-0YVWI.m3u8"}, "slug": "co-dominance-and-incomplete-dominance", "video_id": "OVM68-0YVWI", "youtube_id": "OVM68-0YVWI", "readable_id": "co-dominance-and-incomplete-dominance"}, "ldqb2Snn-6s": {"duration": 153, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/parallel-structure-harder/", "keywords": "education,online learning,learning,lessons", "id": "ldqb2Snn-6s", "title": "Writing: Parallel structure \u2014 Harder example", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing parallel structure.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ldqb2Snn-6s.mp4/ldqb2Snn-6s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ldqb2Snn-6s.mp4/ldqb2Snn-6s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ldqb2Snn-6s.m3u8/ldqb2Snn-6s.m3u8"}, "slug": "parallel-structure-harder", "video_id": "ldqb2Snn-6s", "youtube_id": "ldqb2Snn-6s", "readable_id": "parallel-structure-harder"}, "7ww5T7hCdn4": {"duration": 695, "path": "khan/test-prep/mcat/behavior/human-development/egg-sperm-and-fertilization/", "keywords": "", "id": "7ww5T7hCdn4", "title": "Egg, sperm, and fertilization", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7ww5T7hCdn4.mp4/7ww5T7hCdn4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7ww5T7hCdn4.mp4/7ww5T7hCdn4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7ww5T7hCdn4.m3u8/7ww5T7hCdn4.m3u8"}, "slug": "egg-sperm-and-fertilization", "video_id": "7ww5T7hCdn4", "youtube_id": "7ww5T7hCdn4", "readable_id": "egg-sperm-and-fertilization"}, "DhefUahS55o": {"duration": 362, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/rembrandt-tulp/", "keywords": "Rembrandt, Tulp, surgeons, anatomy, Holland, Netherlands, Golden Age, Mauritshuis, The Hague", "id": "DhefUahS55o", "title": "Rembrandt, The Anatomy Lesson of Dr. Tulp", "description": "Rembrandt van Rijn, The Anatomy Lesson of Dr. Nicolaes Tulp, 1632, oil on canvas, 169.5 x 216.5 cm, (Mauritshuis, Den Haag). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DhefUahS55o.mp4/DhefUahS55o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DhefUahS55o.mp4/DhefUahS55o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DhefUahS55o.m3u8/DhefUahS55o.m3u8"}, "slug": "rembrandt-tulp", "video_id": "DhefUahS55o", "youtube_id": "DhefUahS55o", "readable_id": "rembrandt-tulp"}, "6JFzI1DDyyk": {"duration": 743, "path": "khan/math/probability/descriptive-statistics/old-stats-videos/statistics-variance-of-a-population/", "keywords": "statistics, variance, standard, deviation, population, CC_6_SP_3, CC_6_SP_5_c, CC_7_SP_1", "id": "6JFzI1DDyyk", "title": "Statistics: Variance of a population", "description": "Variance of a population.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6JFzI1DDyyk.mp4/6JFzI1DDyyk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6JFzI1DDyyk.mp4/6JFzI1DDyyk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6JFzI1DDyyk.m3u8/6JFzI1DDyyk.m3u8"}, "slug": "statistics-variance-of-a-population", "video_id": "6JFzI1DDyyk", "youtube_id": "6JFzI1DDyyk", "readable_id": "statistics-variance-of-a-population"}, "S3KMyYYGuPE": {"duration": 504, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-complex-root-probability-part-2/", "keywords": "IIT, JEE, Complex, Root, Probability", "id": "S3KMyYYGuPE", "title": "IIT JEE complex root probability (part 2)", "description": "2010 Paper 1 problem 31 Math (part 2).avi", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S3KMyYYGuPE.mp4/S3KMyYYGuPE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S3KMyYYGuPE.mp4/S3KMyYYGuPE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S3KMyYYGuPE.m3u8/S3KMyYYGuPE.m3u8"}, "slug": "iit-jee-complex-root-probability-part-2", "video_id": "S3KMyYYGuPE", "youtube_id": "S3KMyYYGuPE", "readable_id": "iit-jee-complex-root-probability-part-2"}, "hBBCp9RvmoQ": {"duration": 395, "path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/schizoaffective-disorder/", "keywords": "Schizoaffective Disorder (Disease Or Medical Condition),Mental Illness (Disease Or Medical Condition),Health (Industry)", "id": "hBBCp9RvmoQ", "title": "Schizoaffective disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hBBCp9RvmoQ.mp4/hBBCp9RvmoQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hBBCp9RvmoQ.mp4/hBBCp9RvmoQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hBBCp9RvmoQ.m3u8/hBBCp9RvmoQ.m3u8"}, "slug": "schizoaffective-disorder", "video_id": "hBBCp9RvmoQ", "youtube_id": "hBBCp9RvmoQ", "readable_id": "schizoaffective-disorder"}, "Lhop0mfeJMQ": {"duration": 678, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-26/", "keywords": "gmat, data, sufficiency", "id": "Lhop0mfeJMQ", "title": "GMAT: Data sufficiency 26", "description": "110-111, pg. 287", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Lhop0mfeJMQ.mp4/Lhop0mfeJMQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Lhop0mfeJMQ.mp4/Lhop0mfeJMQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Lhop0mfeJMQ.m3u8/Lhop0mfeJMQ.m3u8"}, "slug": "gmat-data-sufficiency-26", "video_id": "Lhop0mfeJMQ", "youtube_id": "Lhop0mfeJMQ", "readable_id": "gmat-data-sufficiency-26"}, "Im_XjHgQfW0": {"duration": 891, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/stravinsky-firebird/discover-stravinsky-firebird/", "keywords": "", "id": "Im_XjHgQfW0", "title": "Discovering Stravinsky's Firebird: The story and the music", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Im_XjHgQfW0.mp4/Im_XjHgQfW0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Im_XjHgQfW0.mp4/Im_XjHgQfW0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Im_XjHgQfW0.m3u8/Im_XjHgQfW0.m3u8"}, "slug": "discover-stravinsky-firebird", "video_id": "Im_XjHgQfW0", "youtube_id": "Im_XjHgQfW0", "readable_id": "discover-stravinsky-firebird"}, "oIz6VyZew6w": {"duration": 771, "path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/pentose-phosphate-pathway/", "keywords": "", "id": "oIz6VyZew6w", "title": "Pentose phosphate pathway", "description": "What is the Pentose Phosphate Pathway? Why is it important?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oIz6VyZew6w.mp4/oIz6VyZew6w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oIz6VyZew6w.mp4/oIz6VyZew6w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oIz6VyZew6w.m3u8/oIz6VyZew6w.m3u8"}, "slug": "pentose-phosphate-pathway", "video_id": "oIz6VyZew6w", "youtube_id": "oIz6VyZew6w", "readable_id": "pentose-phosphate-pathway"}, "ZsjfUUJUq9s": {"duration": 122, "path": "khan/math/algebra-basics/core-algebra-linear-equations-inequalities/core-algebra-direct_inverse_variation/direct-variation-application/", "keywords": "u15_l3_t1_we4, Direct, Variation, Application, CC_6_EE_2_c, CC_6_EE_9", "id": "ZsjfUUJUq9s", "title": "Direct variation application", "description": "Direct Variation Application", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZsjfUUJUq9s.mp4/ZsjfUUJUq9s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZsjfUUJUq9s.mp4/ZsjfUUJUq9s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZsjfUUJUq9s.m3u8/ZsjfUUJUq9s.m3u8"}, "slug": "direct-variation-application", "video_id": "ZsjfUUJUq9s", "youtube_id": "ZsjfUUJUq9s", "readable_id": "direct-variation-application"}, "b9H22F0Qbgw": {"duration": 63, "path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/points-on-the-coordinate-plane/", "keywords": "", "id": "b9H22F0Qbgw", "title": "Coordinate plane: have all the points been graphed?", "description": "Some of the given ordered pairs are already graphed on the coordinate pane in this example, but not all of them. Can you tell which haven't?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b9H22F0Qbgw.mp4/b9H22F0Qbgw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b9H22F0Qbgw.mp4/b9H22F0Qbgw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b9H22F0Qbgw.m3u8/b9H22F0Qbgw.m3u8"}, "slug": "points-on-the-coordinate-plane", "video_id": "b9H22F0Qbgw", "youtube_id": "b9H22F0Qbgw", "readable_id": "points-on-the-coordinate-plane"}, "IvGVGxBoAdU": {"duration": 87, "path": "khan/college-admissions/paying-for-college/financial-aid-process/applying-for-financial-aid-when-facing-immigration-challenges/", "keywords": "", "id": "IvGVGxBoAdU", "title": "Applying for financial aid when facing immigration challenges", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IvGVGxBoAdU.mp4/IvGVGxBoAdU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IvGVGxBoAdU.mp4/IvGVGxBoAdU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IvGVGxBoAdU.m3u8/IvGVGxBoAdU.m3u8"}, "slug": "applying-for-financial-aid-when-facing-immigration-challenges", "video_id": "IvGVGxBoAdU", "youtube_id": "IvGVGxBoAdU", "readable_id": "applying-for-financial-aid-when-facing-immigration-challenges"}, "6NrTrBzC6dk": {"duration": 563, "path": "khan/computing/computer-science/informationtheory/info-theory/history-of-the-alphabet-language-of-coins-3-9/", "keywords": "alphabet, history of alphabet, information theory, brit cruise", "id": "6NrTrBzC6dk", "title": "History of the alphabet", "description": "The origin of letters", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6NrTrBzC6dk.mp4/6NrTrBzC6dk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6NrTrBzC6dk.mp4/6NrTrBzC6dk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6NrTrBzC6dk.m3u8/6NrTrBzC6dk.m3u8"}, "slug": "history-of-the-alphabet-language-of-coins-3-9", "video_id": "6NrTrBzC6dk", "youtube_id": "6NrTrBzC6dk", "readable_id": "history-of-the-alphabet-language-of-coins-3-9"}, "sKins25SEVk": {"duration": 440, "path": "khan/test-prep/mcat/cells/eukaryotic-cells/epithelial-and-connective-tissue/", "keywords": "", "id": "sKins25SEVk", "title": "Epithelial and connective tissue", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sKins25SEVk.mp4/sKins25SEVk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sKins25SEVk.mp4/sKins25SEVk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sKins25SEVk.m3u8/sKins25SEVk.m3u8"}, "slug": "epithelial-and-connective-tissue", "video_id": "sKins25SEVk", "youtube_id": "sKins25SEVk", "readable_id": "epithelial-and-connective-tissue"}, "XN48Ba9Ncr8": {"duration": 204, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/why-of-algebra/representing-a-relationship-with-a-simple-equation/", "keywords": "Why, we, do, the, same, thing, to, both, sides, 2", "id": "XN48Ba9Ncr8", "title": "How to represent a relationship with a simple equation", "description": "Equations are about relationships (no, not girlfriends and boyfriends!) between the two sides of the equation. Let's again use a scale example to help us understand.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XN48Ba9Ncr8.mp4/XN48Ba9Ncr8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XN48Ba9Ncr8.mp4/XN48Ba9Ncr8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XN48Ba9Ncr8.m3u8/XN48Ba9Ncr8.m3u8"}, "slug": "representing-a-relationship-with-a-simple-equation", "video_id": "XN48Ba9Ncr8", "youtube_id": "XN48Ba9Ncr8", "readable_id": "representing-a-relationship-with-a-simple-equation"}, "dgsogHXtwyA": {"duration": 123, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/france/poussin-et-in-arcadia/", "keywords": "", "id": "dgsogHXtwyA", "title": "Nicolas Poussin, Et in Arcadia Ego", "description": "Nicolas Poussin,\u00a0Et in Arcadia Ego, 1637-38, oil on canvas, 87 x 120 cm (Mus\u00e9e du Louvre). Speakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dgsogHXtwyA.mp4/dgsogHXtwyA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dgsogHXtwyA.mp4/dgsogHXtwyA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dgsogHXtwyA.m3u8/dgsogHXtwyA.m3u8"}, "slug": "poussin-et-in-arcadia", "video_id": "dgsogHXtwyA", "youtube_id": "dgsogHXtwyA", "readable_id": "poussin-et-in-arcadia"}, "RomnHMWSLoE": {"duration": 535, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-circle-hyperbola-common-tangent-part-3/", "keywords": "2010, IIT, JEE, Paper, Problem, 45, Circle, Hyperbola, Common, Tangent, Part", "id": "RomnHMWSLoE", "title": "IIT JEE circle hyperbola common tangent part 3", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RomnHMWSLoE.mp4/RomnHMWSLoE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RomnHMWSLoE.mp4/RomnHMWSLoE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RomnHMWSLoE.m3u8/RomnHMWSLoE.m3u8"}, "slug": "iit-jee-circle-hyperbola-common-tangent-part-3", "video_id": "RomnHMWSLoE", "youtube_id": "RomnHMWSLoE", "readable_id": "iit-jee-circle-hyperbola-common-tangent-part-3"}, "dfO5SWYU6A4": {"duration": 30, "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-student-experience-overview/sscc-blended-seintro/", "keywords": "", "id": "dfO5SWYU6A4", "title": "Introduction & big ideas", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dfO5SWYU6A4.mp4/dfO5SWYU6A4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dfO5SWYU6A4.mp4/dfO5SWYU6A4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dfO5SWYU6A4.m3u8/dfO5SWYU6A4.m3u8"}, "slug": "sscc-blended-seintro", "video_id": "dfO5SWYU6A4", "youtube_id": "dfO5SWYU6A4", "readable_id": "sscc-blended-seintro"}, "vYKhS35m5Fs": {"duration": 688, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/mass-defect-and-binding-energy-edited/", "keywords": "", "id": "vYKhS35m5Fs", "title": "Mass defect and binding energy", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vYKhS35m5Fs.mp4/vYKhS35m5Fs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vYKhS35m5Fs.mp4/vYKhS35m5Fs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vYKhS35m5Fs.m3u8/vYKhS35m5Fs.m3u8"}, "slug": "mass-defect-and-binding-energy-edited", "video_id": "vYKhS35m5Fs", "youtube_id": "vYKhS35m5Fs", "readable_id": "mass-defect-and-binding-energy-edited"}, "kl8nvKKGvOg": {"duration": 369, "path": "khan/science/organic-chemistry/organic-structures/acid-base-review/stabilization-of-a-conjugate-base-hybridization/", "keywords": "", "id": "kl8nvKKGvOg", "title": "Stabilization of a conjugate base: hybridization", "description": "How increased s character in a hybrid orbital stabilizes the conjugate base", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kl8nvKKGvOg.mp4/kl8nvKKGvOg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kl8nvKKGvOg.mp4/kl8nvKKGvOg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kl8nvKKGvOg.m3u8/kl8nvKKGvOg.m3u8"}, "slug": "stabilization-of-a-conjugate-base-hybridization", "video_id": "kl8nvKKGvOg", "youtube_id": "kl8nvKKGvOg", "readable_id": "stabilization-of-a-conjugate-base-hybridization"}, "4L9dSZN5Nvg": {"duration": 438, "path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/radius-convergence-ratio-test/", "keywords": "", "id": "4L9dSZN5Nvg", "title": "Radius of convergence using Ratio Test", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4L9dSZN5Nvg.mp4/4L9dSZN5Nvg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4L9dSZN5Nvg.mp4/4L9dSZN5Nvg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4L9dSZN5Nvg.m3u8/4L9dSZN5Nvg.m3u8"}, "slug": "radius-convergence-ratio-test", "video_id": "4L9dSZN5Nvg", "youtube_id": "4L9dSZN5Nvg", "readable_id": "radius-convergence-ratio-test"}, "HH58VmUbOKM": {"duration": 870, "path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/polarization-of-light-linear-and-circular/", "keywords": "", "id": "HH58VmUbOKM", "title": "Polarization of light, linear and circular", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HH58VmUbOKM.mp4/HH58VmUbOKM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HH58VmUbOKM.mp4/HH58VmUbOKM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HH58VmUbOKM.m3u8/HH58VmUbOKM.m3u8"}, "slug": "polarization-of-light-linear-and-circular", "video_id": "HH58VmUbOKM", "youtube_id": "HH58VmUbOKM", "readable_id": "polarization-of-light-linear-and-circular"}, "Rdd1ddubDuU": {"duration": 43, "path": "khan/college-admissions/paying-for-college/work-study/work-study-opportunity-to-learn/", "keywords": "", "id": "Rdd1ddubDuU", "title": "Student story: Work study as an opportunity to learn", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Rdd1ddubDuU.mp4/Rdd1ddubDuU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Rdd1ddubDuU.mp4/Rdd1ddubDuU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Rdd1ddubDuU.m3u8/Rdd1ddubDuU.m3u8"}, "slug": "work-study-opportunity-to-learn", "video_id": "Rdd1ddubDuU", "youtube_id": "Rdd1ddubDuU", "readable_id": "work-study-opportunity-to-learn"}, "4-LNrHGwtL0": {"duration": 51, "path": "khan/college-admissions/applying-to-college/admissions-essays/ss-admissions-essay-past-mistake/", "keywords": "", "id": "4-LNrHGwtL0", "title": "Student story: Admissions essay about a past mistake", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4-LNrHGwtL0.mp4/4-LNrHGwtL0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4-LNrHGwtL0.mp4/4-LNrHGwtL0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4-LNrHGwtL0.m3u8/4-LNrHGwtL0.m3u8"}, "slug": "ss-admissions-essay-past-mistake", "video_id": "4-LNrHGwtL0", "youtube_id": "4-LNrHGwtL0", "readable_id": "ss-admissions-essay-past-mistake"}, "v13fraCiLEg": {"duration": 600, "path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/approximating-distance-with-rectangles/", "keywords": "", "id": "v13fraCiLEg", "title": "Approximating distance travelled", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v13fraCiLEg.mp4/v13fraCiLEg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v13fraCiLEg.mp4/v13fraCiLEg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v13fraCiLEg.m3u8/v13fraCiLEg.m3u8"}, "slug": "approximating-distance-with-rectangles", "video_id": "v13fraCiLEg", "youtube_id": "v13fraCiLEg", "readable_id": "approximating-distance-with-rectangles"}, "pwHzN9aV1WY": {"duration": 268, "path": "khan/humanities/medieval-world/late-gothic-italy/pisa-rome/pietro-cavallini-the-last-judgement/", "keywords": "Pietro Cavallini, Last Judgement, 1293, fresco, Santa Cecilia, Rome", "id": "pwHzN9aV1WY", "title": "Pietro Cavallini, The Last Judgment", "description": "Pietro Cavallini, The Last Judgment, c.1293, fresco, Santa Cecilia, Rome This fresco was discovered in 1900 and represents one of the few works by Cavallini to survive.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pwHzN9aV1WY.mp4/pwHzN9aV1WY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pwHzN9aV1WY.mp4/pwHzN9aV1WY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pwHzN9aV1WY.m3u8/pwHzN9aV1WY.m3u8"}, "slug": "pietro-cavallini-the-last-judgement", "video_id": "pwHzN9aV1WY", "youtube_id": "pwHzN9aV1WY", "readable_id": "pietro-cavallini-the-last-judgement"}, "TqRReFvbpXA": {"duration": 135, "path": "khan/math/arithmetic/multiplication-division/multi_digit_multiplication/3-digit-times-1-digit-example/", "keywords": "", "id": "TqRReFvbpXA", "title": "Multiplying: 3 digits times 1 digit (with carrying)", "description": "We're carrying numbers in this example. Everyone needs a hand now and then, right?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TqRReFvbpXA.mp4/TqRReFvbpXA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TqRReFvbpXA.mp4/TqRReFvbpXA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TqRReFvbpXA.m3u8/TqRReFvbpXA.m3u8"}, "slug": "3-digit-times-1-digit-example", "video_id": "TqRReFvbpXA", "youtube_id": "TqRReFvbpXA", "readable_id": "3-digit-times-1-digit-example"}, "_irJM-um6HE": {"duration": 174, "path": "khan/math/early-math/cc-early-math-measure-data-topic/cc-early-math-measuring-length/measuring-lengths-with-different-units/", "keywords": "", "id": "_irJM-um6HE", "title": "Measuring lengths with different units", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_irJM-um6HE.mp4/_irJM-um6HE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_irJM-um6HE.mp4/_irJM-um6HE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_irJM-um6HE.m3u8/_irJM-um6HE.m3u8"}, "slug": "measuring-lengths-with-different-units", "video_id": "_irJM-um6HE", "youtube_id": "_irJM-um6HE", "readable_id": "measuring-lengths-with-different-units"}, "oHLbXTOaw7w": {"duration": 143, "path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/seeking-signs-of-past-mars-habitability/", "keywords": "", "id": "oHLbXTOaw7w", "title": "Seeking signs of habitability", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oHLbXTOaw7w.mp4/oHLbXTOaw7w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oHLbXTOaw7w.mp4/oHLbXTOaw7w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oHLbXTOaw7w.m3u8/oHLbXTOaw7w.m3u8"}, "slug": "seeking-signs-of-past-mars-habitability", "video_id": "oHLbXTOaw7w", "youtube_id": "oHLbXTOaw7w", "readable_id": "seeking-signs-of-past-mars-habitability"}, "1iTC9cBk6Ac": {"duration": 571, "path": "khan/humanities/renaissance-reformation/early-renaissance1/beginners-renaissance-florence/contrapposto/", "keywords": "", "id": "1iTC9cBk6Ac", "title": "Contrapposto", "description": "A brief explanation of the term \"contrapposto\" comparing two ancient Greek sculptures: the New York Kouros and an ancient Roman copy of the Doryphoros (or Spear Bearer) by Polykleitos. Although these particular objects may not have been known in the Renaissance, the ideas and form of contrapposto were revived in the Italian Renaissance.\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1iTC9cBk6Ac.mp4/1iTC9cBk6Ac.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1iTC9cBk6Ac.mp4/1iTC9cBk6Ac.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1iTC9cBk6Ac.m3u8/1iTC9cBk6Ac.m3u8"}, "slug": "contrapposto", "video_id": "1iTC9cBk6Ac", "youtube_id": "1iTC9cBk6Ac", "readable_id": "contrapposto"}, "2b7Qv5dtdf8": {"duration": 410, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/christus/christus-portrait-of-a-carthusian-1446/", "keywords": "Christus, Renaissance, Art, Art History, Smarthistory", "id": "2b7Qv5dtdf8", "title": "Christus, Portrait of a Carthusian", "description": "Petrus Christus, Portrait of a Carthusian, 1446 (Metropolitan Museum of Art). Speakers: Dr. David Drogin, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2b7Qv5dtdf8.mp4/2b7Qv5dtdf8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2b7Qv5dtdf8.mp4/2b7Qv5dtdf8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2b7Qv5dtdf8.m3u8/2b7Qv5dtdf8.m3u8"}, "slug": "christus-portrait-of-a-carthusian-1446", "video_id": "2b7Qv5dtdf8", "youtube_id": "2b7Qv5dtdf8", "readable_id": "christus-portrait-of-a-carthusian-1446"}, "Yu4eqwGFJK8": {"duration": 221, "path": "khan/math/geometry/geometric-constructions/polygons-inscribed-in-circles/constructing-regular-hexagon-inscribed-in-circle/", "keywords": "", "id": "Yu4eqwGFJK8", "title": "Constructing regular hexagon inscribed in circle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Yu4eqwGFJK8.mp4/Yu4eqwGFJK8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Yu4eqwGFJK8.mp4/Yu4eqwGFJK8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Yu4eqwGFJK8.m3u8/Yu4eqwGFJK8.m3u8"}, "slug": "constructing-regular-hexagon-inscribed-in-circle", "video_id": "Yu4eqwGFJK8", "youtube_id": "Yu4eqwGFJK8", "readable_id": "constructing-regular-hexagon-inscribed-in-circle"}, "ebGzJabI3mw": {"duration": 282, "path": "khan/science/discoveries-projects/robots/bit-zee/connecting-bit-zee-s-power-wires-and-on-off-switch/", "keywords": "power, power wires, on/off switch, bit-zee, hack, make", "id": "ebGzJabI3mw", "title": "Power wires and on/off switch", "description": "In this video we show you how to switch on and off Bit-zee's electrical power.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ebGzJabI3mw.mp4/ebGzJabI3mw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ebGzJabI3mw.mp4/ebGzJabI3mw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ebGzJabI3mw.m3u8/ebGzJabI3mw.m3u8"}, "slug": "connecting-bit-zee-s-power-wires-and-on-off-switch", "video_id": "ebGzJabI3mw", "youtube_id": "ebGzJabI3mw", "readable_id": "connecting-bit-zee-s-power-wires-and-on-off-switch"}, "mwP5OHJe1ak": {"duration": 219, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-intro/", "keywords": "Bit-zee introduction", "id": "mwP5OHJe1ak", "title": "Introduction", "description": "In this video we discuss some of the key parts of Bit-zee", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mwP5OHJe1ak.mp4/mwP5OHJe1ak.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mwP5OHJe1ak.mp4/mwP5OHJe1ak.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mwP5OHJe1ak.m3u8/mwP5OHJe1ak.m3u8"}, "slug": "bit-zee-intro", "video_id": "mwP5OHJe1ak", "youtube_id": "mwP5OHJe1ak", "readable_id": "bit-zee-intro"}, "8nW9L7cSop4": {"duration": 434, "path": "khan/humanities/history/american-civics/american-civics/ppaca-or-obamacare/", "keywords": "PPACA, obamacare, individual, mandate", "id": "8nW9L7cSop4", "title": "PPACA or \"Obamacare\"", "description": "Basic overview of what is sometimes referred to as \"Obamacare\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8nW9L7cSop4.mp4/8nW9L7cSop4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8nW9L7cSop4.mp4/8nW9L7cSop4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8nW9L7cSop4.m3u8/8nW9L7cSop4.m3u8"}, "slug": "ppaca-or-obamacare", "video_id": "8nW9L7cSop4", "youtube_id": "8nW9L7cSop4", "readable_id": "ppaca-or-obamacare"}, "vsgrWDLEzcQ": {"duration": 308, "path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/classfying-a-quadrilateral-on-the-coordinate-plane/", "keywords": "", "id": "vsgrWDLEzcQ", "title": "Classifying a quadrilateral on the coordinate plane", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vsgrWDLEzcQ.mp4/vsgrWDLEzcQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vsgrWDLEzcQ.mp4/vsgrWDLEzcQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vsgrWDLEzcQ.m3u8/vsgrWDLEzcQ.m3u8"}, "slug": "classfying-a-quadrilateral-on-the-coordinate-plane", "video_id": "vsgrWDLEzcQ", "youtube_id": "vsgrWDLEzcQ", "readable_id": "classfying-a-quadrilateral-on-the-coordinate-plane"}, "ljzn4SADuZc": {"duration": 366, "path": "khan/math/differential-calculus/limits_topic/epsilon_delta/building-the-idea-of-epsilon-delta-definition/", "keywords": "limits", "id": "ljzn4SADuZc", "title": "Building the idea of epsilon-delta definition", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ljzn4SADuZc.mp4/ljzn4SADuZc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ljzn4SADuZc.mp4/ljzn4SADuZc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ljzn4SADuZc.m3u8/ljzn4SADuZc.m3u8"}, "slug": "building-the-idea-of-epsilon-delta-definition", "video_id": "ljzn4SADuZc", "youtube_id": "ljzn4SADuZc", "readable_id": "building-the-idea-of-epsilon-delta-definition"}, "4zKjzl0futI": {"duration": 316, "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/meet-the-skin/", "keywords": "", "id": "4zKjzl0futI", "title": "Meet the skin! (Overview)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4zKjzl0futI.mp4/4zKjzl0futI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4zKjzl0futI.mp4/4zKjzl0futI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4zKjzl0futI.m3u8/4zKjzl0futI.m3u8"}, "slug": "meet-the-skin", "video_id": "4zKjzl0futI", "youtube_id": "4zKjzl0futI", "readable_id": "meet-the-skin"}, "PYkaoQc-fLU": {"duration": 429, "path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/hypertension-effects-on-the-blood-vessels/", "keywords": "", "id": "PYkaoQc-fLU", "title": "Hypertension effects on the blood vessels", "description": "Learn about how hypertension can cause damage to the large/middle sized arteries as well as the small arteries and arterioles. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PYkaoQc-fLU.mp4/PYkaoQc-fLU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PYkaoQc-fLU.mp4/PYkaoQc-fLU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PYkaoQc-fLU.m3u8/PYkaoQc-fLU.m3u8"}, "slug": "hypertension-effects-on-the-blood-vessels", "video_id": "PYkaoQc-fLU", "youtube_id": "PYkaoQc-fLU", "readable_id": "hypertension-effects-on-the-blood-vessels"}, "pKvo0XWZtjo": {"duration": 1164, "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/states-of-matter/", "keywords": "chemistry", "id": "pKvo0XWZtjo", "title": "States of matter", "description": "Introduction to the states or phases of matter.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pKvo0XWZtjo.mp4/pKvo0XWZtjo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pKvo0XWZtjo.mp4/pKvo0XWZtjo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pKvo0XWZtjo.m3u8/pKvo0XWZtjo.m3u8"}, "slug": "states-of-matter", "video_id": "pKvo0XWZtjo", "youtube_id": "pKvo0XWZtjo", "readable_id": "states-of-matter"}, "rLdoKZ7w0xI": {"duration": 647, "path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/variance-of-differences-of-random-variables/", "keywords": "Variance, of, Differences, Random, Variables, expected, value", "id": "rLdoKZ7w0xI", "title": "Variance of differences of random variables", "description": "Variance of Differences of Random Variables", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rLdoKZ7w0xI.mp4/rLdoKZ7w0xI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rLdoKZ7w0xI.mp4/rLdoKZ7w0xI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rLdoKZ7w0xI.m3u8/rLdoKZ7w0xI.m3u8"}, "slug": "variance-of-differences-of-random-variables", "video_id": "rLdoKZ7w0xI", "youtube_id": "rLdoKZ7w0xI", "readable_id": "variance-of-differences-of-random-variables"}, "2_IJz1ivopQ": {"duration": 498, "path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/special-cases-histidine-proline-glycine-cysteine/", "keywords": "", "id": "2_IJz1ivopQ", "title": "Special cases: Histidine, proline, glycine, cysteine", "description": "Certain amino acids stand out for their unique properties. In this video, you'll learn more about what makes histidine, proline, glycine, and cysteine unique.\u00a0 By Tracy Kovach.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2_IJz1ivopQ.mp4/2_IJz1ivopQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2_IJz1ivopQ.mp4/2_IJz1ivopQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2_IJz1ivopQ.m3u8/2_IJz1ivopQ.m3u8"}, "slug": "special-cases-histidine-proline-glycine-cysteine", "video_id": "2_IJz1ivopQ", "youtube_id": "2_IJz1ivopQ", "readable_id": "special-cases-histidine-proline-glycine-cysteine"}, "wDuCOxDxMzY": {"duration": 277, "path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/fed-open-market-operations/", "keywords": "federal, reserve, yield, banking", "id": "wDuCOxDxMzY", "title": "Fed open market operations", "description": "Fed Open Market Operations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wDuCOxDxMzY.mp4/wDuCOxDxMzY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wDuCOxDxMzY.mp4/wDuCOxDxMzY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wDuCOxDxMzY.m3u8/wDuCOxDxMzY.m3u8"}, "slug": "fed-open-market-operations", "video_id": "wDuCOxDxMzY", "youtube_id": "wDuCOxDxMzY", "readable_id": "fed-open-market-operations"}, "3HD-Ak_a6VE": {"duration": 208, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/greater-than-less-than/writing-numerical-inequalities-exercise/", "keywords": "", "id": "3HD-Ak_a6VE", "title": "Inequality word problems", "description": "We're writing inequalities by using information from the word problems. Woohoo!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3HD-Ak_a6VE.mp4/3HD-Ak_a6VE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3HD-Ak_a6VE.mp4/3HD-Ak_a6VE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3HD-Ak_a6VE.m3u8/3HD-Ak_a6VE.m3u8"}, "slug": "writing-numerical-inequalities-exercise", "video_id": "3HD-Ak_a6VE", "youtube_id": "3HD-Ak_a6VE", "readable_id": "writing-numerical-inequalities-exercise"}, "leudxqivIJI": {"duration": 572, "path": "khan/science/physics/linear-momentum/momentum-tutorial/2-dimensional-momentum-problem-part-2/", "keywords": "momentum, angle, velocity, physics", "id": "leudxqivIJI", "title": "2-dimensional momentum problem (part 2)", "description": "We finish the 2-dimensional momentum problem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/leudxqivIJI.mp4/leudxqivIJI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/leudxqivIJI.mp4/leudxqivIJI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/leudxqivIJI.m3u8/leudxqivIJI.m3u8"}, "slug": "2-dimensional-momentum-problem-part-2", "video_id": "leudxqivIJI", "youtube_id": "leudxqivIJI", "readable_id": "2-dimensional-momentum-problem-part-2"}, "hip59oIFSMQ": {"duration": 371, "path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/feininger-cathedral-for-program-of-the-state-bauhaus-in-weimar-woodcut-1919/", "keywords": "Feininger, Cathedral, Smarthistory, Art History, Weimar", "id": "hip59oIFSMQ", "title": "Feininger, Cathedral for the Bauhaus", "description": "Lyonel Feininger, Cathedral for Program of the State Bauhaus in Weimar, woodcut, 1919 (MoMA)\n\nSpeakers: Dr. Steven Zucker, Dr. Juliana Kreinik\n\nFor more: http://www.smarthistory.org/feiningers-cathedral.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hip59oIFSMQ.mp4/hip59oIFSMQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hip59oIFSMQ.mp4/hip59oIFSMQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hip59oIFSMQ.m3u8/hip59oIFSMQ.m3u8"}, "slug": "feininger-cathedral-for-program-of-the-state-bauhaus-in-weimar-woodcut-1919", "video_id": "hip59oIFSMQ", "youtube_id": "hip59oIFSMQ", "readable_id": "feininger-cathedral-for-program-of-the-state-bauhaus-in-weimar-woodcut-1919"}, "cTNnkbKoxgw": {"duration": 107, "path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/biodiversity-hotspot-case-study-madagascar/", "keywords": "", "id": "cTNnkbKoxgw", "title": "Biodiversity hotspot case study: Madagascar", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cTNnkbKoxgw.mp4/cTNnkbKoxgw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cTNnkbKoxgw.mp4/cTNnkbKoxgw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cTNnkbKoxgw.m3u8/cTNnkbKoxgw.m3u8"}, "slug": "biodiversity-hotspot-case-study-madagascar", "video_id": "cTNnkbKoxgw", "youtube_id": "cTNnkbKoxgw", "readable_id": "biodiversity-hotspot-case-study-madagascar"}, "Ly86lwq_2gc": {"duration": 563, "path": "khan/math/geometry/similarity/triangle_similarlity/similar-triangle-example-problems/", "keywords": "similarity, congruence", "id": "Ly86lwq_2gc", "title": "Similar triangle example problems", "description": "Multiple examples looking for similarity of triangles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ly86lwq_2gc.mp4/Ly86lwq_2gc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ly86lwq_2gc.mp4/Ly86lwq_2gc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ly86lwq_2gc.m3u8/Ly86lwq_2gc.m3u8"}, "slug": "similar-triangle-example-problems", "video_id": "Ly86lwq_2gc", "youtube_id": "Ly86lwq_2gc", "readable_id": "similar-triangle-example-problems"}, "8u6gNH6xIfc": {"duration": 480, "path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/a-tale-of-two-rovers/", "keywords": "", "id": "8u6gNH6xIfc", "title": "Spirit & opportunity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8u6gNH6xIfc.mp4/8u6gNH6xIfc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8u6gNH6xIfc.mp4/8u6gNH6xIfc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8u6gNH6xIfc.m3u8/8u6gNH6xIfc.m3u8"}, "slug": "a-tale-of-two-rovers", "video_id": "8u6gNH6xIfc", "youtube_id": "8u6gNH6xIfc", "readable_id": "a-tale-of-two-rovers"}, "EwEbZI57P1o": {"duration": 442, "path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/matching-exponential-functions/", "keywords": "", "id": "EwEbZI57P1o", "title": "Matching functions to their graphs", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EwEbZI57P1o.mp4/EwEbZI57P1o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EwEbZI57P1o.mp4/EwEbZI57P1o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EwEbZI57P1o.m3u8/EwEbZI57P1o.m3u8"}, "slug": "matching-exponential-functions", "video_id": "EwEbZI57P1o", "youtube_id": "EwEbZI57P1o", "readable_id": "matching-exponential-functions"}, "jQN07Hvq6WI": {"duration": 420, "path": "khan/science/biology/membranes-and-transport/passive-transport/passive-transport-and-selective-permeability/", "keywords": "education,online learning,learning,lessons,passive transport,selective permeability,concentration gradient,diffusion", "id": "jQN07Hvq6WI", "title": "Passive transport and selective permeability", "description": "Passive transport and selective permeability. Passive transport through diffusion.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jQN07Hvq6WI.mp4/jQN07Hvq6WI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jQN07Hvq6WI.mp4/jQN07Hvq6WI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jQN07Hvq6WI.m3u8/jQN07Hvq6WI.m3u8"}, "slug": "passive-transport-and-selective-permeability", "video_id": "jQN07Hvq6WI", "youtube_id": "jQN07Hvq6WI", "readable_id": "passive-transport-and-selective-permeability"}, "xHgPtFUbAeU": {"duration": 539, "path": "khan/math/pre-algebra/decimals-pre-alg/sig-figs-pre-alg/addition-and-subtraction-with-significant-figures/", "keywords": "Addition, and, Subtraction, with, Significant, Figures", "id": "xHgPtFUbAeU", "title": "Addition and subtraction with significant figures", "description": "Addition and Subtraction with Significant Figures", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xHgPtFUbAeU.mp4/xHgPtFUbAeU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xHgPtFUbAeU.mp4/xHgPtFUbAeU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xHgPtFUbAeU.m3u8/xHgPtFUbAeU.m3u8"}, "slug": "addition-and-subtraction-with-significant-figures", "video_id": "xHgPtFUbAeU", "youtube_id": "xHgPtFUbAeU", "readable_id": "addition-and-subtraction-with-significant-figures"}, "NRJFZaSw1Y0": {"duration": 117, "path": "khan/math/pre-algebra/fractions-pre-alg/understanding-fractions-pre-alg/recognizing-fractions-exercise/", "keywords": "", "id": "NRJFZaSw1Y0", "title": "Recognizing fractions exercise", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NRJFZaSw1Y0.mp4/NRJFZaSw1Y0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NRJFZaSw1Y0.mp4/NRJFZaSw1Y0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NRJFZaSw1Y0.m3u8/NRJFZaSw1Y0.m3u8"}, "slug": "recognizing-fractions-exercise", "video_id": "NRJFZaSw1Y0", "youtube_id": "NRJFZaSw1Y0", "readable_id": "recognizing-fractions-exercise"}, "O-Onby3soVo": {"duration": 721, "path": "khan/test-prep/mcat/physical-processes/vectors-and-scalars/vectors-and-scalars-in-2d-edited/", "keywords": "", "id": "O-Onby3soVo", "title": "Visualizing vectors in 2 dimensions", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O-Onby3soVo.mp4/O-Onby3soVo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O-Onby3soVo.mp4/O-Onby3soVo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O-Onby3soVo.m3u8/O-Onby3soVo.m3u8"}, "slug": "vectors-and-scalars-in-2d-edited", "video_id": "O-Onby3soVo", "youtube_id": "O-Onby3soVo", "readable_id": "vectors-and-scalars-in-2d-edited"}, "DTF2qg2McwY": {"duration": 196, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-2-course-reviews/", "keywords": "", "id": "DTF2qg2McwY", "title": "2 Course reviews", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DTF2qg2McwY.mp4/DTF2qg2McwY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DTF2qg2McwY.mp4/DTF2qg2McwY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DTF2qg2McwY.m3u8/DTF2qg2McwY.m3u8"}, "slug": "sat-2-course-reviews", "video_id": "DTF2qg2McwY", "youtube_id": "DTF2qg2McwY", "readable_id": "sat-2-course-reviews"}, "36v2EXZRzUE": {"duration": 141, "path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-data/u08-l1-t2-we2-reading-line-graphs/", "keywords": "u08_l1_t2_we2, Reading, Line, Graphs", "id": "36v2EXZRzUE", "title": "Reading line graphs", "description": "A line graph is another way to visually represent data, especially data that changes over time. They are extremely useful Let's take a look at this example.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/36v2EXZRzUE.mp4/36v2EXZRzUE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/36v2EXZRzUE.mp4/36v2EXZRzUE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/36v2EXZRzUE.m3u8/36v2EXZRzUE.m3u8"}, "slug": "u08-l1-t2-we2-reading-line-graphs", "video_id": "36v2EXZRzUE", "youtube_id": "36v2EXZRzUE", "readable_id": "u08-l1-t2-we2-reading-line-graphs"}, "gYcwNXHrtlQ": {"duration": 177, "path": "khan/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture/shiva/", "keywords": "", "id": "gYcwNXHrtlQ", "title": "The Hindu deity Shiva", "description": "Learn how to identify the Hindu deity Shiva and hear a story related to a depiction of Shiva in the Asian Art Museum's collection. Learn more about Shiva on education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gYcwNXHrtlQ.mp4/gYcwNXHrtlQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gYcwNXHrtlQ.mp4/gYcwNXHrtlQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gYcwNXHrtlQ.m3u8/gYcwNXHrtlQ.m3u8"}, "slug": "shiva", "video_id": "gYcwNXHrtlQ", "youtube_id": "gYcwNXHrtlQ", "readable_id": "shiva"}, "sEiQm7IzUg8": {"duration": 803, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions/addition-of-water-acid-catalyzed-mechanism/", "keywords": "Addition, of, Water, (Acid-Catalyzed), Mechanism", "id": "sEiQm7IzUg8", "title": "Addition of water (acid-catalyzed) mechanism", "description": "Addition of Water (Acid-Catalyzed) Mechanism", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sEiQm7IzUg8.mp4/sEiQm7IzUg8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sEiQm7IzUg8.mp4/sEiQm7IzUg8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sEiQm7IzUg8.m3u8/sEiQm7IzUg8.m3u8"}, "slug": "addition-of-water-acid-catalyzed-mechanism", "video_id": "sEiQm7IzUg8", "youtube_id": "sEiQm7IzUg8", "readable_id": "addition-of-water-acid-catalyzed-mechanism"}, "-J-6VGxld54": {"duration": 286, "path": "khan/math/pre-algebra/measurement/rectangle-area-perimeter-word-pr/length-and-width-from-perimeter-and-area/", "keywords": "", "id": "-J-6VGxld54", "title": "Area and perimeter word problem: table dimensions", "description": "If you know the area and perimeter of a rectangle, you can figure out the length and width. STILL don't believe us?Just watch.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-J-6VGxld54.mp4/-J-6VGxld54.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-J-6VGxld54.mp4/-J-6VGxld54.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-J-6VGxld54.m3u8/-J-6VGxld54.m3u8"}, "slug": "length-and-width-from-perimeter-and-area", "video_id": "-J-6VGxld54", "youtube_id": "-J-6VGxld54", "readable_id": "length-and-width-from-perimeter-and-area"}, "S4T5K4BM3j0": {"duration": 231, "path": "khan/college-admissions/wrapping-up/introduction-wu/sal-khans-story-wrapping-up/", "keywords": "", "id": "S4T5K4BM3j0", "title": "Sal Khan's story: Wrapping up", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S4T5K4BM3j0.mp4/S4T5K4BM3j0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S4T5K4BM3j0.mp4/S4T5K4BM3j0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S4T5K4BM3j0.m3u8/S4T5K4BM3j0.m3u8"}, "slug": "sal-khans-story-wrapping-up", "video_id": "S4T5K4BM3j0", "youtube_id": "S4T5K4BM3j0", "readable_id": "sal-khans-story-wrapping-up"}, "BHFuLS9NW6s": {"duration": 242, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/gentileschi-judith/", "keywords": "gentileschi, art history, baroque,", "id": "BHFuLS9NW6s", "title": "Gentileschi, Judith and Holofernes", "description": "Artemisia Gentileschi, Judith and Holofernes, 1620-21, oil on canvas, 162.5 x 199 cm (Uffizi Gallery, Florence)\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BHFuLS9NW6s.mp4/BHFuLS9NW6s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BHFuLS9NW6s.mp4/BHFuLS9NW6s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BHFuLS9NW6s.m3u8/BHFuLS9NW6s.m3u8"}, "slug": "gentileschi-judith", "video_id": "BHFuLS9NW6s", "youtube_id": "BHFuLS9NW6s", "readable_id": "gentileschi-judith"}, "S0Kak0qQFgM": {"duration": 701, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/tb-pathogenesis/", "keywords": "", "id": "S0Kak0qQFgM", "title": "TB pathogenesis", "description": "Find out exactly how TB causes damage to the lungs. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S0Kak0qQFgM.mp4/S0Kak0qQFgM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S0Kak0qQFgM.mp4/S0Kak0qQFgM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S0Kak0qQFgM.m3u8/S0Kak0qQFgM.m3u8"}, "slug": "tb-pathogenesis", "video_id": "S0Kak0qQFgM", "youtube_id": "S0Kak0qQFgM", "readable_id": "tb-pathogenesis"}, "ShJqEBcyiBg": {"duration": 312, "path": "khan/test-prep/mcat/social-inequality/social-class/social-reproduction/", "keywords": "", "id": "ShJqEBcyiBg", "title": "Social reproduction", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ShJqEBcyiBg.mp4/ShJqEBcyiBg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ShJqEBcyiBg.mp4/ShJqEBcyiBg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ShJqEBcyiBg.m3u8/ShJqEBcyiBg.m3u8"}, "slug": "social-reproduction", "video_id": "ShJqEBcyiBg", "youtube_id": "ShJqEBcyiBg", "readable_id": "social-reproduction"}, "dOxXl_6BDQc": {"duration": 610, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-hairy-trig-and-algebra-part-1/", "keywords": "IIT, JEE, Trigonometry, law, of, cosines, quartic, roots, fourth, degree, polynomial", "id": "dOxXl_6BDQc", "title": "IIT JEE hairy trig and algebra (part 1)", "description": "2010 Paper 1 problem 38 Hairy Trig and Algebra", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dOxXl_6BDQc.mp4/dOxXl_6BDQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dOxXl_6BDQc.mp4/dOxXl_6BDQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dOxXl_6BDQc.m3u8/dOxXl_6BDQc.m3u8"}, "slug": "iit-jee-hairy-trig-and-algebra-part-1", "video_id": "dOxXl_6BDQc", "youtube_id": "dOxXl_6BDQc", "readable_id": "iit-jee-hairy-trig-and-algebra-part-1"}, "qrK-FBdjGk4": {"duration": 398, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/functions-of-the-nervous-system/", "keywords": "MCAT", "id": "qrK-FBdjGk4", "title": "Functions of the nervous system", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qrK-FBdjGk4.mp4/qrK-FBdjGk4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qrK-FBdjGk4.mp4/qrK-FBdjGk4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qrK-FBdjGk4.m3u8/qrK-FBdjGk4.m3u8"}, "slug": "functions-of-the-nervous-system", "video_id": "qrK-FBdjGk4", "youtube_id": "qrK-FBdjGk4", "readable_id": "functions-of-the-nervous-system"}, "vk2GvyNmYD0": {"duration": 380, "path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/grant-wood-american-gothic-1930/", "keywords": "Grant Wood, American Gothic, 1930, Art Institute of Chicago, art history, Smarthistory, Google Art Project, painting, art, OER, Regionalism, American Scene, American, Iowa", "id": "vk2GvyNmYD0", "title": "Wood, American Gothic", "description": "Grant Wood, American Gothic, 1930, oil on beaver board, 78 x 65.3 cm / 30-3/4 x 25-3/4 inches (The Art Institute of Chicago) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vk2GvyNmYD0.mp4/vk2GvyNmYD0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vk2GvyNmYD0.mp4/vk2GvyNmYD0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vk2GvyNmYD0.m3u8/vk2GvyNmYD0.m3u8"}, "slug": "grant-wood-american-gothic-1930", "video_id": "vk2GvyNmYD0", "youtube_id": "vk2GvyNmYD0", "readable_id": "grant-wood-american-gothic-1930"}, "H-OoyU8Gb_Q": {"duration": 533, "path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/osteoarthritis-vs-rheumatoid-arthritis-symptoms/", "keywords": "", "id": "H-OoyU8Gb_Q", "title": "Osteoarthritis vs rheumatoid arthritis symptoms", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H-OoyU8Gb_Q.mp4/H-OoyU8Gb_Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H-OoyU8Gb_Q.mp4/H-OoyU8Gb_Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H-OoyU8Gb_Q.m3u8/H-OoyU8Gb_Q.m3u8"}, "slug": "osteoarthritis-vs-rheumatoid-arthritis-symptoms", "video_id": "H-OoyU8Gb_Q", "youtube_id": "H-OoyU8Gb_Q", "readable_id": "osteoarthritis-vs-rheumatoid-arthritis-symptoms"}, "0uGPdsF4ZmE": {"duration": 195, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/pronoun-number-basic/", "keywords": "education,online learning,learning,lessons", "id": "0uGPdsF4ZmE", "title": "Writing: Pronoun person and number \u2014 Basic example", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing pronouns.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0uGPdsF4ZmE.mp4/0uGPdsF4ZmE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0uGPdsF4ZmE.mp4/0uGPdsF4ZmE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0uGPdsF4ZmE.m3u8/0uGPdsF4ZmE.m3u8"}, "slug": "pronoun-number-basic", "video_id": "0uGPdsF4ZmE", "youtube_id": "0uGPdsF4ZmE", "readable_id": "pronoun-number-basic"}, "jSGGHmTXA3o": {"duration": 299, "path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/moma-painting-technique-reinhardt/", "keywords": "", "id": "jSGGHmTXA3o", "title": "The Painting Techniques of Ad Reinhardt", "description": "Take time with Ad Reinhardt's black canvases and discover the rewards of contemplation. To learn more and create your own works, take our online course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jSGGHmTXA3o.mp4/jSGGHmTXA3o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jSGGHmTXA3o.mp4/jSGGHmTXA3o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jSGGHmTXA3o.m3u8/jSGGHmTXA3o.m3u8"}, "slug": "moma-painting-technique-reinhardt", "video_id": "jSGGHmTXA3o", "youtube_id": "jSGGHmTXA3o", "readable_id": "moma-painting-technique-reinhardt"}, "_alU-o_qDt8": {"duration": 449, "path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/cimabue-maesta-of-santa-trinita-1280-900-1290/", "keywords": "", "id": "_alU-o_qDt8", "title": "Cimabue, Santa Trinita Madonna", "description": "Cimabue, Maesta of Santa Trinita, 1280-1290, tempera on panel, 151 1/2 x 87 3/4\" (385 x 223 cm), Uffizi, Florence Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_alU-o_qDt8.mp4/_alU-o_qDt8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_alU-o_qDt8.mp4/_alU-o_qDt8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_alU-o_qDt8.m3u8/_alU-o_qDt8.m3u8"}, "slug": "cimabue-maesta-of-santa-trinita-1280-900-1290", "video_id": "_alU-o_qDt8", "youtube_id": "_alU-o_qDt8", "readable_id": "cimabue-maesta-of-santa-trinita-1280-900-1290"}, "qhKJ1DG9kYY": {"duration": 546, "path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/laplace-transform-of-l-t/", "keywords": "differential, equations, laplace, transform", "id": "qhKJ1DG9kYY", "title": "Laplace transform of t: L{t}", "description": "Determining the Laplace Transform of t", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qhKJ1DG9kYY.mp4/qhKJ1DG9kYY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qhKJ1DG9kYY.mp4/qhKJ1DG9kYY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qhKJ1DG9kYY.m3u8/qhKJ1DG9kYY.m3u8"}, "slug": "laplace-transform-of-l-t", "video_id": "qhKJ1DG9kYY", "youtube_id": "qhKJ1DG9kYY", "readable_id": "laplace-transform-of-l-t"}, "N30tN9158Kc": {"duration": 552, "path": "khan/math/algebra/quadratics/quadratic_odds_ends/solving-a-quadratic-by-factoring/", "keywords": "algebra, CC_39336_A-SSE_3_a", "id": "N30tN9158Kc", "title": "Solving a quadratic by factoring", "description": "factoring quadratics", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N30tN9158Kc.mp4/N30tN9158Kc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N30tN9158Kc.mp4/N30tN9158Kc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N30tN9158Kc.m3u8/N30tN9158Kc.m3u8"}, "slug": "solving-a-quadratic-by-factoring", "video_id": "N30tN9158Kc", "youtube_id": "N30tN9158Kc", "readable_id": "solving-a-quadratic-by-factoring"}, "xeLeYS7GRvY": {"duration": 207, "path": "khan/math/arithmetic/fractions/visualizing-equivalent-fractions/fractions-cut-and-copy-1-exercise/", "keywords": "", "id": "xeLeYS7GRvY", "title": "Fractions cut and copy 1 exercise", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xeLeYS7GRvY.mp4/xeLeYS7GRvY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xeLeYS7GRvY.mp4/xeLeYS7GRvY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xeLeYS7GRvY.m3u8/xeLeYS7GRvY.m3u8"}, "slug": "fractions-cut-and-copy-1-exercise", "video_id": "xeLeYS7GRvY", "youtube_id": "xeLeYS7GRvY", "readable_id": "fractions-cut-and-copy-1-exercise"}, "fS-YgKwAco8": {"duration": 415, "path": "khan/test-prep/mcat/behavior/social-psychology/a-closer-look-at-the-stanford-prison-experiment/", "keywords": "", "id": "fS-YgKwAco8", "title": "A closer look at the Stanford prison experiment", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fS-YgKwAco8.mp4/fS-YgKwAco8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fS-YgKwAco8.mp4/fS-YgKwAco8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fS-YgKwAco8.m3u8/fS-YgKwAco8.m3u8"}, "slug": "a-closer-look-at-the-stanford-prison-experiment", "video_id": "fS-YgKwAco8", "youtube_id": "fS-YgKwAco8", "readable_id": "a-closer-look-at-the-stanford-prison-experiment"}, "jiq8Baz4KzU": {"duration": 45, "path": "khan/college-admissions/making-high-school-count/standardized-tests/ss-standardized-tests/", "keywords": "", "id": "jiq8Baz4KzU", "title": "Student story: Standardized tests", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jiq8Baz4KzU.mp4/jiq8Baz4KzU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jiq8Baz4KzU.mp4/jiq8Baz4KzU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jiq8Baz4KzU.m3u8/jiq8Baz4KzU.m3u8"}, "slug": "ss-standardized-tests", "video_id": "jiq8Baz4KzU", "youtube_id": "jiq8Baz4KzU", "readable_id": "ss-standardized-tests"}, "By11dtc-IEo": {"duration": 145, "path": "khan/science/discoveries-projects/discovery-lab-2013/spout-instructor-reflections/", "keywords": "", "id": "By11dtc-IEo", "title": "DLab: Instructor reflections on the Spout Bot", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/By11dtc-IEo.mp4/By11dtc-IEo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/By11dtc-IEo.mp4/By11dtc-IEo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/By11dtc-IEo.m3u8/By11dtc-IEo.m3u8"}, "slug": "spout-instructor-reflections", "video_id": "By11dtc-IEo", "youtube_id": "By11dtc-IEo", "readable_id": "spout-instructor-reflections"}, "5_4xmCLmtb8": {"duration": 623, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/preparation-of-acyl-acid-chlorides/", "keywords": "", "id": "5_4xmCLmtb8", "title": "Preparation of acyl (acid) chlorides", "description": "How to prepare acyl (acid) chlorides using thionyl chloride", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5_4xmCLmtb8.mp4/5_4xmCLmtb8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5_4xmCLmtb8.mp4/5_4xmCLmtb8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5_4xmCLmtb8.m3u8/5_4xmCLmtb8.m3u8"}, "slug": "preparation-of-acyl-acid-chlorides", "video_id": "5_4xmCLmtb8", "youtube_id": "5_4xmCLmtb8", "readable_id": "preparation-of-acyl-acid-chlorides"}, "BTOHSRVqN20": {"duration": 438, "path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/distribution-patterns/distribution-how/", "keywords": "", "id": "BTOHSRVqN20", "title": "How biodiversity is distributed globally", "description": "How biodiversity is distributed globally", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BTOHSRVqN20.mp4/BTOHSRVqN20.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BTOHSRVqN20.mp4/BTOHSRVqN20.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BTOHSRVqN20.m3u8/BTOHSRVqN20.m3u8"}, "slug": "distribution-how", "video_id": "BTOHSRVqN20", "youtube_id": "BTOHSRVqN20", "readable_id": "distribution-how"}, "QS1LMomm0Gk": {"duration": 382, "path": "khan/math/algebra-basics/core-algebra-foundations/core-algebra-foundations-fractions/adding-fractions-with-different-signs/", "keywords": "U09_L2_T2_we2, Adding, fractions, with, different, signs, CC_4_NF_3_a, CC_4_NF_3_b, CC_4_NF_3_c, CC_5_NF_1, CC_5_NF_2", "id": "QS1LMomm0Gk", "title": "Adding fractions with different signs", "description": "Use a number line to add fractions with different signs.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QS1LMomm0Gk.mp4/QS1LMomm0Gk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QS1LMomm0Gk.mp4/QS1LMomm0Gk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QS1LMomm0Gk.m3u8/QS1LMomm0Gk.m3u8"}, "slug": "adding-fractions-with-different-signs", "video_id": "QS1LMomm0Gk", "youtube_id": "QS1LMomm0Gk", "readable_id": "adding-fractions-with-different-signs"}, "LSJuu4Qm2qQ": {"duration": 551, "path": "khan/math/algebra2/conics_precalc/conics_precalc_eqs/identifying-conics-1/", "keywords": "conic, section, graphing, ellipse, hyperbola", "id": "LSJuu4Qm2qQ", "title": "Identifying an ellipse from equation", "description": "Part 1 of identifying and graphic conic sections", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LSJuu4Qm2qQ.mp4/LSJuu4Qm2qQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LSJuu4Qm2qQ.mp4/LSJuu4Qm2qQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LSJuu4Qm2qQ.m3u8/LSJuu4Qm2qQ.m3u8"}, "slug": "identifying-conics-1", "video_id": "LSJuu4Qm2qQ", "youtube_id": "LSJuu4Qm2qQ", "readable_id": "identifying-conics-1"}, "abPkNFzxeE4": {"duration": 429, "path": "khan/partner-content/wi-phi/value-theory-1/the-nonidentity-problem/", "keywords": "", "id": "abPkNFzxeE4", "title": "Ethics: The Nonidentity Problem", "description": "In this video, Molly introduces the nonidentity problem. This problem arises in cases where an individual appears to be wronged by the very action upon which his or her own existence depends. We\u2019ll see why this problem has implications for reproductive choices, genetic engineering, and whether we should take care of the environment for the sake of future generations.\n\nSpeaker: Dr. Molly Gardner, Assistant Professor of Philosophy, Bowling Green State University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/abPkNFzxeE4.mp4/abPkNFzxeE4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/abPkNFzxeE4.mp4/abPkNFzxeE4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/abPkNFzxeE4.m3u8/abPkNFzxeE4.m3u8"}, "slug": "the-nonidentity-problem", "video_id": "abPkNFzxeE4", "youtube_id": "abPkNFzxeE4", "readable_id": "the-nonidentity-problem"}, "I3vIAzMcm4Y": {"duration": 489, "path": "khan/math/differential-equations/second-order-differential-equations/undetermined-coefficients/undetermined-coefficients-3/", "keywords": "nonhomogeneous, differential, equations", "id": "I3vIAzMcm4Y", "title": "Undetermined coefficients 3", "description": "Another example where the nonhomogeneous part is a polynomial", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I3vIAzMcm4Y.mp4/I3vIAzMcm4Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I3vIAzMcm4Y.mp4/I3vIAzMcm4Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I3vIAzMcm4Y.m3u8/I3vIAzMcm4Y.m3u8"}, "slug": "undetermined-coefficients-3", "video_id": "I3vIAzMcm4Y", "youtube_id": "I3vIAzMcm4Y", "readable_id": "undetermined-coefficients-3"}, "DzYwB3uSU-c": {"duration": 242, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds/open-ended-mutual-fund-part-1/", "keywords": "Open, Ended, Mutual, Fund", "id": "DzYwB3uSU-c", "title": "Open-ended mutual fund (part 1)", "description": "Introduction to Open-Ended Mutual Funds", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DzYwB3uSU-c.mp4/DzYwB3uSU-c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DzYwB3uSU-c.mp4/DzYwB3uSU-c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DzYwB3uSU-c.m3u8/DzYwB3uSU-c.m3u8"}, "slug": "open-ended-mutual-fund-part-1", "video_id": "DzYwB3uSU-c", "youtube_id": "DzYwB3uSU-c", "readable_id": "open-ended-mutual-fund-part-1"}, "6c8BCZd6GXU": {"duration": 570, "path": "khan/test-prep/mcat/society-and-culture/social-structures/relating-social-theories-to-medicine/", "keywords": "", "id": "6c8BCZd6GXU", "title": "Relating social theories to medicine", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6c8BCZd6GXU.mp4/6c8BCZd6GXU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6c8BCZd6GXU.mp4/6c8BCZd6GXU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6c8BCZd6GXU.m3u8/6c8BCZd6GXU.m3u8"}, "slug": "relating-social-theories-to-medicine", "video_id": "6c8BCZd6GXU", "youtube_id": "6c8BCZd6GXU", "readable_id": "relating-social-theories-to-medicine"}, "1ct7LUx23io": {"duration": 473, "path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-exponential/", "keywords": "", "id": "1ct7LUx23io", "title": "u-substitution with exponential function", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1ct7LUx23io.mp4/1ct7LUx23io.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1ct7LUx23io.mp4/1ct7LUx23io.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1ct7LUx23io.m3u8/1ct7LUx23io.m3u8"}, "slug": "u-substitution-exponential", "video_id": "1ct7LUx23io", "youtube_id": "1ct7LUx23io", "readable_id": "u-substitution-exponential"}, "JxC2phkdY8Y": {"duration": 251, "path": "khan/test-prep/mcat/biomolecules/genetic-mutations/the-effects-of-mutations/", "keywords": "MCAT", "id": "JxC2phkdY8Y", "title": "The effects of mutations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JxC2phkdY8Y.mp4/JxC2phkdY8Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JxC2phkdY8Y.mp4/JxC2phkdY8Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JxC2phkdY8Y.m3u8/JxC2phkdY8Y.m3u8"}, "slug": "the-effects-of-mutations", "video_id": "JxC2phkdY8Y", "youtube_id": "JxC2phkdY8Y", "readable_id": "the-effects-of-mutations"}, "H-aDABqFY6s": {"duration": 162, "path": "khan/humanities/art-africa/west-africa/mali1/bundle-of-emotions/", "keywords": "body, ceramic, sculpture, Africa", "id": "H-aDABqFY6s", "title": "Seated Figure", "description": "Met curator Ya\u00eblle Biro on humanity in Seated Figure by the Djenn\u00e9 peoples of Mali and the Inland Niger Delta region.\n\nThis haunting figure huddles with its leg hugged to its chest and its head dropped on its knee. It simultaneously suggests the knotted tension of anxiety and the sublime absorption of deep prayer. Created over 700 years ago, in the Inland Niger Delta region of present-day Mali, this elegant work's intense emotional immediacy blurs the boundaries of time and place.\u00a0This terracotta sculpture comes from a site called Jenne-jeno, the oldest known city in sub-Saharan Africa. Jenne-jeno flourished in the ninth century C.E., but declined and was abandoned by 1400. Items of cast brass and forged iron, clay vessels, and figures like this one survive. They testify to what scholars contend was a richly varied and highly sophisticated urban society.\n\nA few controlled archaeological digs provide only the vaguest outlines of the original significance of the art of this time and region. Recovered terracotta figures are frequently quite detailed. They include jewelry, clothing, and body ornaments such as the parallel columns of bumps and circles on the back of this work. Sometimes they cover the entire body and seem to represent the pustules of some dreadful illness. Sculptures like this one may represent ancestors or mythic characters, or might have served as guardians. Here, the figure's shaved head and attitude of introspection resemble mourning customs still practiced by many cultures in sub-Saharan Africa. It is possible that the earlier peoples of the Inland Niger Delta had similar ritual methods to express grief over the death of loved ones.\n\nView this work on\u00a0metmuseum.org.\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H-aDABqFY6s.mp4/H-aDABqFY6s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H-aDABqFY6s.mp4/H-aDABqFY6s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H-aDABqFY6s.m3u8/H-aDABqFY6s.m3u8"}, "slug": "bundle-of-emotions", "video_id": "H-aDABqFY6s", "youtube_id": "H-aDABqFY6s", "readable_id": "bundle-of-emotions"}, "ixE3APFcFdA": {"duration": 220, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/dave-smith/kauffman-dave-smith-2/", "keywords": "", "id": "ixE3APFcFdA", "title": "Engineering a Solution to Every Problem", "description": "When Dave Smith came to the harsh realization and he alone was in charge of his future, he took a resourceful route to become an expert in his field. Mixing the desire to make it with the imagination to fake it, he went to great lengths to connect with TekScape IT customers and make them believe that his tiny organization was big enough to solve their trickiest problems.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ixE3APFcFdA.mp4/ixE3APFcFdA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ixE3APFcFdA.mp4/ixE3APFcFdA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ixE3APFcFdA.m3u8/ixE3APFcFdA.m3u8"}, "slug": "kauffman-dave-smith-2", "video_id": "ixE3APFcFdA", "youtube_id": "ixE3APFcFdA", "readable_id": "kauffman-dave-smith-2"}, "epgwuzzDHsQ": {"duration": 779, "path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/maclauren-and-taylor-series-intuition/", "keywords": "calculus, taylor, maclauren, polynomial", "id": "epgwuzzDHsQ", "title": "Maclaurin and Taylor series intuition", "description": "Approximating a function at 0 using a polynomial", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/epgwuzzDHsQ.mp4/epgwuzzDHsQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/epgwuzzDHsQ.mp4/epgwuzzDHsQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/epgwuzzDHsQ.m3u8/epgwuzzDHsQ.m3u8"}, "slug": "maclauren-and-taylor-series-intuition", "video_id": "epgwuzzDHsQ", "youtube_id": "epgwuzzDHsQ", "readable_id": "maclauren-and-taylor-series-intuition"}, "EVoZCOVzdaU": {"duration": 259, "path": "khan/partner-content/wi-phi/the-history-of-philosophy/experimental-philosophy/", "keywords": "", "id": "EVoZCOVzdaU", "title": "Contemporary: Experimental Philosophy", "description": "In this video, Joshua Knobe describes a new philosophical tool called experimental philosophy. To explain the project, he introduces some new research from Felipe De Brigard, and he shows how it applies to a traditional problem in philosophy.\u00a0\n\nSpeaker: Dr. Joshua Knobe,\u00a0Professor of Philosophy and Cognitive Science, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EVoZCOVzdaU.mp4/EVoZCOVzdaU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EVoZCOVzdaU.mp4/EVoZCOVzdaU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EVoZCOVzdaU.m3u8/EVoZCOVzdaU.m3u8"}, "slug": "experimental-philosophy", "video_id": "EVoZCOVzdaU", "youtube_id": "EVoZCOVzdaU", "readable_id": "experimental-philosophy"}, "pe8Dm_FUpdU": {"duration": 247, "path": "khan/math/algebra2/conics_precalc/parabolas_precalc/focus-and-directrix-introduction/", "keywords": "", "id": "pe8Dm_FUpdU", "title": "Focus and directrix introduction", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pe8Dm_FUpdU.mp4/pe8Dm_FUpdU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pe8Dm_FUpdU.mp4/pe8Dm_FUpdU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pe8Dm_FUpdU.m3u8/pe8Dm_FUpdU.m3u8"}, "slug": "focus-and-directrix-introduction", "video_id": "pe8Dm_FUpdU", "youtube_id": "pe8Dm_FUpdU", "readable_id": "focus-and-directrix-introduction"}, "Xp6V_lO1ZKA": {"duration": 443, "path": "khan/math/precalculus/prob_comb/dependent_events_precalc/monty-hall-problem/", "keywords": "probability, monty, hall, lets, make, deal", "id": "Xp6V_lO1ZKA", "title": "Probability and the Monty Hall problem", "description": "Here we have a presentation and analysis of the famous thought experiment: the \"Monty Hall\" problem! This is fun.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Xp6V_lO1ZKA.mp4/Xp6V_lO1ZKA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Xp6V_lO1ZKA.mp4/Xp6V_lO1ZKA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Xp6V_lO1ZKA.m3u8/Xp6V_lO1ZKA.m3u8"}, "slug": "monty-hall-problem", "video_id": "Xp6V_lO1ZKA", "youtube_id": "Xp6V_lO1ZKA", "readable_id": "monty-hall-problem"}, "WyAtOqfCiBw": {"duration": 242, "path": "khan/computing/computer-science/informationtheory/moderninfotheory/a-mathematical-theory-of-communication/", "keywords": "markov chains", "id": "WyAtOqfCiBw", "title": "A mathematical theory of communication", "description": "Claude Shannon demonstrated how to generate \"english looking\" text using Markov chains.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WyAtOqfCiBw.mp4/WyAtOqfCiBw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WyAtOqfCiBw.mp4/WyAtOqfCiBw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WyAtOqfCiBw.m3u8/WyAtOqfCiBw.m3u8"}, "slug": "a-mathematical-theory-of-communication", "video_id": "WyAtOqfCiBw", "youtube_id": "WyAtOqfCiBw", "readable_id": "a-mathematical-theory-of-communication"}, "xDh4grm_ZSY": {"duration": 343, "path": "khan/test-prep/mcat/physical-processes/gas-phase/definition-of-an-ideal-gas-ideal-gas-law/", "keywords": "", "id": "xDh4grm_ZSY", "title": "Definition of an ideal gas, ideal gas law", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xDh4grm_ZSY.mp4/xDh4grm_ZSY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xDh4grm_ZSY.mp4/xDh4grm_ZSY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xDh4grm_ZSY.m3u8/xDh4grm_ZSY.m3u8"}, "slug": "definition-of-an-ideal-gas-ideal-gas-law", "video_id": "xDh4grm_ZSY", "youtube_id": "xDh4grm_ZSY", "readable_id": "definition-of-an-ideal-gas-ideal-gas-law"}, "Ht-YXje4R2g": {"duration": 171, "path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/simplifying-with-exponent-properties/", "keywords": "", "id": "Ht-YXje4R2g", "title": "How to evaluate a numerical expression with mixed exponential and radical terms (example)", "description": "Sal shows how to evaluate 6^(1/2)*(5th root of 6)^3.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ht-YXje4R2g.mp4/Ht-YXje4R2g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ht-YXje4R2g.mp4/Ht-YXje4R2g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ht-YXje4R2g.m3u8/Ht-YXje4R2g.m3u8"}, "slug": "simplifying-with-exponent-properties", "video_id": "Ht-YXje4R2g", "youtube_id": "Ht-YXje4R2g", "readable_id": "simplifying-with-exponent-properties"}, "il0EJrY64qE": {"duration": 778, "path": "khan/math/geometry/intro_euclid/language-and-notation-of-basic-geometry/", "keywords": "geometry", "id": "il0EJrY64qE", "title": "Basic geometry: language and labels", "description": "Before learning any new concept (mathematical or otherwise), it's important we learn and use a common language and label concepts consistently.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/il0EJrY64qE.mp4/il0EJrY64qE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/il0EJrY64qE.mp4/il0EJrY64qE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/il0EJrY64qE.m3u8/il0EJrY64qE.m3u8"}, "slug": "language-and-notation-of-basic-geometry", "video_id": "il0EJrY64qE", "youtube_id": "il0EJrY64qE", "readable_id": "language-and-notation-of-basic-geometry"}, "byj5VLuLS6c": {"duration": 623, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/end-systolic-pressure-volume-relationship-espvr/", "keywords": "", "id": "byj5VLuLS6c", "title": "End systolic pressure-volume relationship (ESPVR)", "description": "Find out what happens when the left ventricle is not allowed to relax, and instead you simply add and take away blood from it. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/byj5VLuLS6c.mp4/byj5VLuLS6c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/byj5VLuLS6c.mp4/byj5VLuLS6c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/byj5VLuLS6c.m3u8/byj5VLuLS6c.m3u8"}, "slug": "end-systolic-pressure-volume-relationship-espvr", "video_id": "byj5VLuLS6c", "youtube_id": "byj5VLuLS6c", "readable_id": "end-systolic-pressure-volume-relationship-espvr"}, "ANGRsubKS3M": {"duration": 362, "path": "khan/college-admissions/paying-for-college/introduction-pfc/a-message-to-parents-on-paying-for-college/", "keywords": "", "id": "ANGRsubKS3M", "title": "A message to parents on paying for college", "description": "FAFSA | CSS Profile | Federal Student Loans | Federal Parent PLUS Loans | College Scorecard & Net Price Calculator | FAFSA4caster | Additional Info on Beth Kobliner", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ANGRsubKS3M.mp4/ANGRsubKS3M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ANGRsubKS3M.mp4/ANGRsubKS3M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ANGRsubKS3M.m3u8/ANGRsubKS3M.m3u8"}, "slug": "a-message-to-parents-on-paying-for-college", "video_id": "ANGRsubKS3M", "youtube_id": "ANGRsubKS3M", "readable_id": "a-message-to-parents-on-paying-for-college"}, "dam16G6cZ8k": {"duration": 687, "path": "khan/math/differential-calculus/derivative_applications/calc_optimization/optimizing-profit-at-a-shoe-factory/", "keywords": "", "id": "dam16G6cZ8k", "title": "Optimizing profit at a shoe factory", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dam16G6cZ8k.mp4/dam16G6cZ8k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dam16G6cZ8k.mp4/dam16G6cZ8k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dam16G6cZ8k.m3u8/dam16G6cZ8k.m3u8"}, "slug": "optimizing-profit-at-a-shoe-factory", "video_id": "dam16G6cZ8k", "youtube_id": "dam16G6cZ8k", "readable_id": "optimizing-profit-at-a-shoe-factory"}, "0fKBhvDjuy0": {"duration": 541, "path": "khan/partner-content/big-history-project/what-is-big-history/scale/powers-of-ten/", "keywords": "", "id": "0fKBhvDjuy0", "title": "Powers of Ten\u2122 (1977)", "description": "Powers of Ten takes us on an adventure in magnitude.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0fKBhvDjuy0.mp4/0fKBhvDjuy0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0fKBhvDjuy0.mp4/0fKBhvDjuy0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0fKBhvDjuy0.m3u8/0fKBhvDjuy0.m3u8"}, "slug": "powers-of-ten", "video_id": "0fKBhvDjuy0", "youtube_id": "0fKBhvDjuy0", "readable_id": "powers-of-ten"}, "KQ63wu7lsXo": {"duration": 358, "path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/barberini-faun-c-220-b-c-e/", "keywords": "hellenistic, greek, art, sculpture, mythology", "id": "KQ63wu7lsXo", "title": "Barberini Faun", "description": "Barberini Faun, c. 220 B.C.E., Hellenistic Period (Glyptothek, Munich). Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KQ63wu7lsXo.mp4/KQ63wu7lsXo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KQ63wu7lsXo.mp4/KQ63wu7lsXo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KQ63wu7lsXo.m3u8/KQ63wu7lsXo.m3u8"}, "slug": "barberini-faun-c-220-b-c-e", "video_id": "KQ63wu7lsXo", "youtube_id": "KQ63wu7lsXo", "readable_id": "barberini-faun-c-220-b-c-e"}, "oNgo9bbDi7Q": {"duration": 491, "path": "khan/test-prep/mcat/physical-processes/normal-forces/balanced-and-unbalanced-forces/", "keywords": "balanced, forces, newton's, laws, net, force", "id": "oNgo9bbDi7Q", "title": "Balanced and unbalanced forces", "description": "Primer on identifying balanced and unbalanced forces", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oNgo9bbDi7Q.mp4/oNgo9bbDi7Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oNgo9bbDi7Q.mp4/oNgo9bbDi7Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oNgo9bbDi7Q.m3u8/oNgo9bbDi7Q.m3u8"}, "slug": "balanced-and-unbalanced-forces", "video_id": "oNgo9bbDi7Q", "youtube_id": "oNgo9bbDi7Q", "readable_id": "balanced-and-unbalanced-forces"}, "Muba9-W2FOQ": {"duration": 273, "path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns/interpreting-and-graphing-relationships-between-patterns/", "keywords": "", "id": "Muba9-W2FOQ", "title": "Number patterns:: interpreting and graphing relationships", "description": "We're building in complexity as we interpret and graph the relationships between patterns in the given ordered pairs. Don't stress. We're here to help!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Muba9-W2FOQ.mp4/Muba9-W2FOQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Muba9-W2FOQ.mp4/Muba9-W2FOQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Muba9-W2FOQ.m3u8/Muba9-W2FOQ.m3u8"}, "slug": "interpreting-and-graphing-relationships-between-patterns", "video_id": "Muba9-W2FOQ", "youtube_id": "Muba9-W2FOQ", "readable_id": "interpreting-and-graphing-relationships-between-patterns"}, "pNBxj5ad8G4": {"duration": 144, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-15/", "keywords": "", "id": "pNBxj5ad8G4", "title": "15 Right triangle side lengths", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pNBxj5ad8G4.mp4/pNBxj5ad8G4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pNBxj5ad8G4.mp4/pNBxj5ad8G4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pNBxj5ad8G4.m3u8/pNBxj5ad8G4.m3u8"}, "slug": "sat-2010-may-6-15", "video_id": "pNBxj5ad8G4", "youtube_id": "pNBxj5ad8G4", "readable_id": "sat-2010-may-6-15"}, "owcmu4XxrHM": {"duration": 218, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/interpretting-futures-fair-value-in-the-premarket/", "keywords": "finance, stocks, investing, market", "id": "owcmu4XxrHM", "title": "Interpreting futures fair value in the premarket", "description": "How to interpret the market price of a futures contract relative to the fair value in the premarket", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/owcmu4XxrHM.mp4/owcmu4XxrHM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/owcmu4XxrHM.mp4/owcmu4XxrHM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/owcmu4XxrHM.m3u8/owcmu4XxrHM.m3u8"}, "slug": "interpretting-futures-fair-value-in-the-premarket", "video_id": "owcmu4XxrHM", "youtube_id": "owcmu4XxrHM", "readable_id": "interpretting-futures-fair-value-in-the-premarket"}, "xNOZ5yjIw-c": {"duration": 162, "path": "khan/college-admissions/making-high-school-count/introduction-mhsc/overview-making-high-school-count/", "keywords": "", "id": "xNOZ5yjIw-c", "title": "Overview: Making high school count", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xNOZ5yjIw-c.mp4/xNOZ5yjIw-c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xNOZ5yjIw-c.mp4/xNOZ5yjIw-c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xNOZ5yjIw-c.m3u8/xNOZ5yjIw-c.m3u8"}, "slug": "overview-making-high-school-count", "video_id": "xNOZ5yjIw-c", "youtube_id": "xNOZ5yjIw-c", "readable_id": "overview-making-high-school-count"}, "rSadG6EtJmY": {"duration": 219, "path": "khan/math/algebra-basics/core-algebra-linear-equations-inequalities/core-algebra-direct_inverse_variation/direct-variation-1/", "keywords": "Direct, Variation, CC_8_F_1, CC_8_F_4, CC_8_F_5", "id": "rSadG6EtJmY", "title": "Direct variation 1", "description": "Direct Variation 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rSadG6EtJmY.mp4/rSadG6EtJmY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rSadG6EtJmY.mp4/rSadG6EtJmY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rSadG6EtJmY.m3u8/rSadG6EtJmY.m3u8"}, "slug": "direct-variation-1", "video_id": "rSadG6EtJmY", "youtube_id": "rSadG6EtJmY", "readable_id": "direct-variation-1"}, "wuhNZejHeBg": {"duration": 107, "path": "khan/partner-content/nasa/measuringuniverse/spacemath1/lunareclipse/", "keywords": "", "id": "wuhNZejHeBg", "title": "Lunar eclipse", "description": "When the moon passes through the Earth's shadow, it causes the moon to look very unusual for a short period of time. This event is called a lunar eclipse, and it occurs roughly twice a year.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wuhNZejHeBg.mp4/wuhNZejHeBg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wuhNZejHeBg.mp4/wuhNZejHeBg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wuhNZejHeBg.m3u8/wuhNZejHeBg.m3u8"}, "slug": "lunareclipse", "video_id": "wuhNZejHeBg", "youtube_id": "wuhNZejHeBg", "readable_id": "lunareclipse"}, "MdIfefLcdoU": {"duration": 625, "path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-7-bank-goes-into-bankruptcy/", "keywords": "bailout, receivership, bankruptcy, paulson, bernanke", "id": "MdIfefLcdoU", "title": "Bailout 7: Bank goes into bankruptcy", "description": "What happens when there is no equity infusion and the bank goes in to bankruptcy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MdIfefLcdoU.mp4/MdIfefLcdoU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MdIfefLcdoU.mp4/MdIfefLcdoU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MdIfefLcdoU.m3u8/MdIfefLcdoU.m3u8"}, "slug": "bailout-7-bank-goes-into-bankruptcy", "video_id": "MdIfefLcdoU", "youtube_id": "MdIfefLcdoU", "readable_id": "bailout-7-bank-goes-into-bankruptcy"}, "x6rAFt5FW_Q": {"duration": 306, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/renoir-moulin-de-la-galette-1876/", "keywords": "Pierre-Auguste Renoir, Smarthistory, Art History, Impressionism, Renoir", "id": "x6rAFt5FW_Q", "title": "Renoir, Moulin de la Galette", "description": "Pierre-Auguste Renoir, Moulin de la Galette, 1876, oil on canvas, 51 1/2 x 68 7/8 in. (131 x 175 cm), (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x6rAFt5FW_Q.mp4/x6rAFt5FW_Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x6rAFt5FW_Q.mp4/x6rAFt5FW_Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x6rAFt5FW_Q.m3u8/x6rAFt5FW_Q.m3u8"}, "slug": "renoir-moulin-de-la-galette-1876", "video_id": "x6rAFt5FW_Q", "youtube_id": "x6rAFt5FW_Q", "readable_id": "renoir-moulin-de-la-galette-1876"}, "FPh6EDv0Eew": {"duration": 190, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/deflation-tutorial/deflation/", "keywords": "finance, deflation", "id": "FPh6EDv0Eew", "title": "Deflation", "description": "Basics of deflation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FPh6EDv0Eew.mp4/FPh6EDv0Eew.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FPh6EDv0Eew.mp4/FPh6EDv0Eew.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FPh6EDv0Eew.m3u8/FPh6EDv0Eew.m3u8"}, "slug": "deflation", "video_id": "FPh6EDv0Eew", "youtube_id": "FPh6EDv0Eew", "readable_id": "deflation"}, "u2hLYcmI5y4": {"duration": 319, "path": "khan/math/arithmetic/fractions/understanding_fractions/fraction-word-problems-1-exercise/", "keywords": "", "id": "u2hLYcmI5y4", "title": "Figuring out how much pizza is left", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u2hLYcmI5y4.mp4/u2hLYcmI5y4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u2hLYcmI5y4.mp4/u2hLYcmI5y4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u2hLYcmI5y4.m3u8/u2hLYcmI5y4.m3u8"}, "slug": "fraction-word-problems-1-exercise", "video_id": "u2hLYcmI5y4", "youtube_id": "u2hLYcmI5y4", "readable_id": "fraction-word-problems-1-exercise"}, "d1oNF88SAgg": {"duration": 378, "path": "khan/math/algebra-basics/core-algebra-foundations/algebra-foundations-decimal-operations/another-percent-word-problem/", "keywords": "percent, word, problem, CC_7_RP_3", "id": "d1oNF88SAgg", "title": "Percent word problem example 1", "description": "We're putting a little algebra to work to find the full price when you know the discount price in this percent word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d1oNF88SAgg.mp4/d1oNF88SAgg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d1oNF88SAgg.mp4/d1oNF88SAgg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d1oNF88SAgg.m3u8/d1oNF88SAgg.m3u8"}, "slug": "another-percent-word-problem", "video_id": "d1oNF88SAgg", "youtube_id": "d1oNF88SAgg", "readable_id": "another-percent-word-problem"}, "RdFfIEDxo18": {"duration": 604, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/reduction-of-alkynes/", "keywords": "", "id": "RdFfIEDxo18", "title": "Reduction of alkynes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RdFfIEDxo18.mp4/RdFfIEDxo18.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RdFfIEDxo18.mp4/RdFfIEDxo18.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RdFfIEDxo18.m3u8/RdFfIEDxo18.m3u8"}, "slug": "reduction-of-alkynes", "video_id": "RdFfIEDxo18", "youtube_id": "RdFfIEDxo18", "readable_id": "reduction-of-alkynes"}, "oxbSM2IwIBo": {"duration": 214, "path": "khan/partner-content/big-history-project/future/looking-forward/bhp-visions-of-future/", "keywords": "", "id": "oxbSM2IwIBo", "title": "Bill Gates: Visions of the Future", "description": "Businessman and philanthropist Bill Gates looks towards a future of sustainable energy and worldwide education.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oxbSM2IwIBo.mp4/oxbSM2IwIBo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oxbSM2IwIBo.mp4/oxbSM2IwIBo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oxbSM2IwIBo.m3u8/oxbSM2IwIBo.m3u8"}, "slug": "bhp-visions-of-future", "video_id": "oxbSM2IwIBo", "youtube_id": "oxbSM2IwIBo", "readable_id": "bhp-visions-of-future"}, "Z3qRkxzmYnU": {"duration": 108, "path": "khan/math/arithmetic/multiplication-division/mult-div-word-problems/division-word-problem-example-1/", "keywords": "", "id": "Z3qRkxzmYnU", "title": "Division word problem example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z3qRkxzmYnU.mp4/Z3qRkxzmYnU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z3qRkxzmYnU.mp4/Z3qRkxzmYnU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z3qRkxzmYnU.m3u8/Z3qRkxzmYnU.m3u8"}, "slug": "division-word-problem-example-1", "video_id": "Z3qRkxzmYnU", "youtube_id": "Z3qRkxzmYnU", "readable_id": "division-word-problem-example-1"}, "aHx3k9NhIEM": {"duration": 203, "path": "khan/humanities/art-asia/south-asia/afghanistan/hidden-treasures-afghanistan/", "keywords": "", "id": "aHx3k9NhIEM", "title": "Hidden treasures revealed", "description": "A story of daring and intrigue - archaeologists discovered the treasures of Afghanistan's nomadic ancestors but then had to hide them to keep them safe.\u00a0\u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aHx3k9NhIEM.mp4/aHx3k9NhIEM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aHx3k9NhIEM.mp4/aHx3k9NhIEM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aHx3k9NhIEM.m3u8/aHx3k9NhIEM.m3u8"}, "slug": "hidden-treasures-afghanistan", "video_id": "aHx3k9NhIEM", "youtube_id": "aHx3k9NhIEM", "readable_id": "hidden-treasures-afghanistan"}, "ycBxbgjQns4": {"duration": 192, "path": "khan/math/early-math/cc-early-math-add-sub-1000/cc-early-math-sub-ones-tens-hundreds/subtracting-3-digits/", "keywords": "", "id": "ycBxbgjQns4", "title": "Subtracting hundreds, tens, and ones", "description": "Learn how to subtract three-digit numbers by subtracting ones, tens, and hundreds.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ycBxbgjQns4.mp4/ycBxbgjQns4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ycBxbgjQns4.mp4/ycBxbgjQns4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ycBxbgjQns4.m3u8/ycBxbgjQns4.m3u8"}, "slug": "subtracting-3-digits", "video_id": "ycBxbgjQns4", "youtube_id": "ycBxbgjQns4", "readable_id": "subtracting-3-digits"}, "4_xhiP6g2ow": {"duration": 608, "path": "khan/math/geometry/triangle-properties/perpendicular_bisectors/three-points-defining-a-circle/", "keywords": "Three, Points, Defining, Circle", "id": "4_xhiP6g2ow", "title": "Three points defining a circle", "description": "Three points uniquely define a circle. The center of a circle is the circumcenter of any triangle the circle is circumscribed about.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4_xhiP6g2ow.mp4/4_xhiP6g2ow.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4_xhiP6g2ow.mp4/4_xhiP6g2ow.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4_xhiP6g2ow.m3u8/4_xhiP6g2ow.m3u8"}, "slug": "three-points-defining-a-circle", "video_id": "4_xhiP6g2ow", "youtube_id": "4_xhiP6g2ow", "readable_id": "three-points-defining-a-circle"}, "9VZsMY15xeU": {"duration": 516, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/old-school-equations/averages/", "keywords": "Math, Khan, Average, Algebra, CC_6_EE_6", "id": "9VZsMY15xeU", "title": "Averages", "description": "Introduction to averages and algebra problems involving averages.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9VZsMY15xeU.mp4/9VZsMY15xeU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9VZsMY15xeU.mp4/9VZsMY15xeU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9VZsMY15xeU.m3u8/9VZsMY15xeU.m3u8"}, "slug": "averages", "video_id": "9VZsMY15xeU", "youtube_id": "9VZsMY15xeU", "readable_id": "averages"}, "yUaI0JriZtY": {"duration": 176, "path": "khan/math/precalculus/prob_comb/basic_prob_precalc/simple-probability/", "keywords": "u08_l4_t1_we1, Simple, Probability", "id": "yUaI0JriZtY", "title": "Finding probablity example", "description": "In order to find the probability of picking a yellow marble from a bag, we have to first determine the number of possible outcomes and how then many of them meet our constraints.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yUaI0JriZtY.mp4/yUaI0JriZtY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yUaI0JriZtY.mp4/yUaI0JriZtY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yUaI0JriZtY.m3u8/yUaI0JriZtY.m3u8"}, "slug": "simple-probability", "video_id": "yUaI0JriZtY", "youtube_id": "yUaI0JriZtY", "readable_id": "simple-probability"}, "o_Bb43LApog": {"duration": 244, "path": "khan/science/health-and-medicine/lab-values/molarity-molality-osmolarity-osmolality-and-tonicity-what-s-the-difference/", "keywords": "", "id": "o_Bb43LApog", "title": "Molarity, molality, osmolarity, osmolality, and tonicity - what's the difference?", "description": "See how each of these terms tells us something different about a solution. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o_Bb43LApog.mp4/o_Bb43LApog.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o_Bb43LApog.mp4/o_Bb43LApog.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o_Bb43LApog.m3u8/o_Bb43LApog.m3u8"}, "slug": "molarity-molality-osmolarity-osmolality-and-tonicity-what-s-the-difference", "video_id": "o_Bb43LApog", "youtube_id": "o_Bb43LApog", "readable_id": "molarity-molality-osmolarity-osmolality-and-tonicity-what-s-the-difference"}, "aCbyeNsc1Ck": {"duration": 51, "path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/ss-extracurriculars-that-carry-over-from-high-school-to-college/", "keywords": "", "id": "aCbyeNsc1Ck", "title": "Student story: Extracurriculars that carry over from high school to college", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aCbyeNsc1Ck.mp4/aCbyeNsc1Ck.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aCbyeNsc1Ck.mp4/aCbyeNsc1Ck.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aCbyeNsc1Ck.m3u8/aCbyeNsc1Ck.m3u8"}, "slug": "ss-extracurriculars-that-carry-over-from-high-school-to-college", "video_id": "aCbyeNsc1Ck", "youtube_id": "aCbyeNsc1Ck", "readable_id": "ss-extracurriculars-that-carry-over-from-high-school-to-college"}, "Gl7bQNm92fE": {"duration": 813, "path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/formation-of-imines-and-enamines/", "keywords": "", "id": "Gl7bQNm92fE", "title": "Formation of imines and enamines", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Gl7bQNm92fE.mp4/Gl7bQNm92fE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Gl7bQNm92fE.mp4/Gl7bQNm92fE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Gl7bQNm92fE.m3u8/Gl7bQNm92fE.m3u8"}, "slug": "formation-of-imines-and-enamines", "video_id": "Gl7bQNm92fE", "youtube_id": "Gl7bQNm92fE", "readable_id": "formation-of-imines-and-enamines"}, "asyIsn59Lnc": {"duration": 645, "path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem/divergence-theorem-example-1/", "keywords": "", "id": "asyIsn59Lnc", "title": "Divergence theorem example 1", "description": "Example of calculating the flux across a surface by using the Divergence Theorem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/asyIsn59Lnc.mp4/asyIsn59Lnc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/asyIsn59Lnc.mp4/asyIsn59Lnc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/asyIsn59Lnc.m3u8/asyIsn59Lnc.m3u8"}, "slug": "divergence-theorem-example-1", "video_id": "asyIsn59Lnc", "youtube_id": "asyIsn59Lnc", "readable_id": "divergence-theorem-example-1"}, "gkifo46--JA": {"duration": 234, "path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area-of-strange-quadrilateral/", "keywords": "", "id": "gkifo46--JA", "title": "How to find the area of a strange quadrilateral on a grid", "description": "Again, some quadrilaterals can be oddly shaped so break it up into shapes where finding the area is more easily determined.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gkifo46--JA.mp4/gkifo46--JA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gkifo46--JA.mp4/gkifo46--JA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gkifo46--JA.m3u8/gkifo46--JA.m3u8"}, "slug": "area-of-strange-quadrilateral", "video_id": "gkifo46--JA", "youtube_id": "gkifo46--JA", "readable_id": "area-of-strange-quadrilateral"}, "KkJ0wL9f2VY": {"duration": 558, "path": "khan/test-prep/mcat/physical-processes/sound/doppler-effect-formula-when-source-is-moving-away/", "keywords": "doppler, effect, formula", "id": "KkJ0wL9f2VY", "title": "Doppler effect formula when source is moving away", "description": "Doppler effect formula when source is moving away", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KkJ0wL9f2VY.mp4/KkJ0wL9f2VY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KkJ0wL9f2VY.mp4/KkJ0wL9f2VY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KkJ0wL9f2VY.m3u8/KkJ0wL9f2VY.m3u8"}, "slug": "doppler-effect-formula-when-source-is-moving-away", "video_id": "KkJ0wL9f2VY", "youtube_id": "KkJ0wL9f2VY", "readable_id": "doppler-effect-formula-when-source-is-moving-away"}, "YEQNnO64wLc": {"duration": 610, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/utis-in-pregnancy/", "keywords": "", "id": "YEQNnO64wLc", "title": "UTIs in pregnancy", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YEQNnO64wLc.mp4/YEQNnO64wLc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YEQNnO64wLc.mp4/YEQNnO64wLc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YEQNnO64wLc.m3u8/YEQNnO64wLc.m3u8"}, "slug": "utis-in-pregnancy", "video_id": "YEQNnO64wLc", "youtube_id": "YEQNnO64wLc", "readable_id": "utis-in-pregnancy"}, "hRgAA8IH834": {"duration": 411, "path": "khan/test-prep/mcat/processing-the-environment/stress/stressors/", "keywords": "MCAT", "id": "hRgAA8IH834", "title": "Stressors", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hRgAA8IH834.mp4/hRgAA8IH834.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hRgAA8IH834.mp4/hRgAA8IH834.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hRgAA8IH834.m3u8/hRgAA8IH834.m3u8"}, "slug": "stressors", "video_id": "hRgAA8IH834", "youtube_id": "hRgAA8IH834", "readable_id": "stressors"}, "3cnIa0fYJkY": {"duration": 479, "path": "khan/math/precalculus/precalc-matrices/zero-identity-matrix-tutorial/identity-matrix/", "keywords": "", "id": "3cnIa0fYJkY", "title": "Identity matrix", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3cnIa0fYJkY.mp4/3cnIa0fYJkY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3cnIa0fYJkY.mp4/3cnIa0fYJkY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3cnIa0fYJkY.m3u8/3cnIa0fYJkY.m3u8"}, "slug": "identity-matrix", "video_id": "3cnIa0fYJkY", "youtube_id": "3cnIa0fYJkY", "readable_id": "identity-matrix"}, "W5QExA4er6w": {"duration": 351, "path": "khan/test-prep/mcat/processing-the-environment/cognition/problem-solving/", "keywords": "", "id": "W5QExA4er6w", "title": "Problem solving", "description": "Learn about types of problems and common approaches to solving them.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W5QExA4er6w.mp4/W5QExA4er6w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W5QExA4er6w.mp4/W5QExA4er6w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W5QExA4er6w.m3u8/W5QExA4er6w.m3u8"}, "slug": "problem-solving", "video_id": "W5QExA4er6w", "youtube_id": "W5QExA4er6w", "readable_id": "problem-solving"}, "Ea6qS3nuvng": {"duration": 532, "path": "khan/humanities/renaissance-reformation/northern/hieronymus-bosch/bosch-last-judgment-triptych-1504-08/", "keywords": "khan academy, smarthistory, art history, Bosch, Last Judgment, Hell, Heaven, Creation, painting, triptych, altarpiece, Vienna", "id": "Ea6qS3nuvng", "title": "Bosch, the Last Judgment", "description": "Hieronymus Bosch, Last Judgment Triptych, 1504-08, Akademie f\u00fcr bildenden K\u00fcnste, Vienna, overall dimensions 163 x 250 cm, central panel 163 x 128 cm, wings 163 x 60 cm. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ea6qS3nuvng.mp4/Ea6qS3nuvng.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ea6qS3nuvng.mp4/Ea6qS3nuvng.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ea6qS3nuvng.m3u8/Ea6qS3nuvng.m3u8"}, "slug": "bosch-last-judgment-triptych-1504-08", "video_id": "Ea6qS3nuvng", "youtube_id": "Ea6qS3nuvng", "readable_id": "bosch-last-judgment-triptych-1504-08"}, "Wp2nVIzBsE8": {"duration": 468, "path": "khan/math/probability/statistics-inferential/normal_distribution/ck12-org-normal-distribution-problems-z-score/", "keywords": "z-score, normal, distribution, CC_6_SP_5_c, CC_6_SP_5_d, CC_7_SP_2", "id": "Wp2nVIzBsE8", "title": "ck12.org normal distribution problems: z-score", "description": "Z-score practice", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Wp2nVIzBsE8.mp4/Wp2nVIzBsE8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Wp2nVIzBsE8.mp4/Wp2nVIzBsE8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Wp2nVIzBsE8.m3u8/Wp2nVIzBsE8.m3u8"}, "slug": "ck12-org-normal-distribution-problems-z-score", "video_id": "Wp2nVIzBsE8", "youtube_id": "Wp2nVIzBsE8", "readable_id": "ck12-org-normal-distribution-problems-z-score"}, "1wsF9GpGd00": {"duration": 272, "path": "khan/math/probability/independent-dependent-probability/basic_set_operations/subset-strict-subset-and-superset/", "keywords": "", "id": "1wsF9GpGd00", "title": "Subset, strict subset, and superset", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1wsF9GpGd00.mp4/1wsF9GpGd00.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1wsF9GpGd00.mp4/1wsF9GpGd00.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1wsF9GpGd00.m3u8/1wsF9GpGd00.m3u8"}, "slug": "subset-strict-subset-and-superset", "video_id": "1wsF9GpGd00", "youtube_id": "1wsF9GpGd00", "readable_id": "subset-strict-subset-and-superset"}, "cgccQVcFLi4": {"duration": 853, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/foramen-ovale-and-ductus-arteriosus/", "keywords": "", "id": "cgccQVcFLi4", "title": "Foramen ovale and ductus arteriosus", "description": "Watch how the fetal heart allows blood to simply bypass the lungs altogether using the Foramen Ovale and the Ductus Arteriosus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cgccQVcFLi4.mp4/cgccQVcFLi4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cgccQVcFLi4.mp4/cgccQVcFLi4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cgccQVcFLi4.m3u8/cgccQVcFLi4.m3u8"}, "slug": "foramen-ovale-and-ductus-arteriosus", "video_id": "cgccQVcFLi4", "youtube_id": "cgccQVcFLi4", "readable_id": "foramen-ovale-and-ductus-arteriosus"}, "CGA8sRwqIFg": {"duration": 802, "path": "khan/science/chemistry/chemical-bonds/types-chemical-bonds/ionic-covalent-and-metallic-bonds/", "keywords": "chemisty, bonding, covalent, ionic, bond, bonds, science", "id": "CGA8sRwqIFg", "title": "Ionic, covalent, and metallic bonds", "description": "Introduction to ionic, covalent, polar covalent and metallic bonds.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CGA8sRwqIFg.mp4/CGA8sRwqIFg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CGA8sRwqIFg.mp4/CGA8sRwqIFg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CGA8sRwqIFg.m3u8/CGA8sRwqIFg.m3u8"}, "slug": "ionic-covalent-and-metallic-bonds", "video_id": "CGA8sRwqIFg", "youtube_id": "CGA8sRwqIFg", "readable_id": "ionic-covalent-and-metallic-bonds"}, "hGMwMlksZlM": {"duration": 301, "path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/emperor-hadrian-s-private-retreat-the-maritime-theatre-at-hadrian-s-villa-tivoli/", "keywords": "", "id": "hGMwMlksZlM", "title": "Maritime Theatre at Hadrian's Villa, Tivoli", "description": "Maritime Theatre at Hadrian's Villa, Tivoli, Villa begun in 117 C.E. \n\nA conversation with Dr. Bernard Frischer and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hGMwMlksZlM.mp4/hGMwMlksZlM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hGMwMlksZlM.mp4/hGMwMlksZlM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hGMwMlksZlM.m3u8/hGMwMlksZlM.m3u8"}, "slug": "emperor-hadrian-s-private-retreat-the-maritime-theatre-at-hadrian-s-villa-tivoli", "video_id": "hGMwMlksZlM", "youtube_id": "hGMwMlksZlM", "readable_id": "emperor-hadrian-s-private-retreat-the-maritime-theatre-at-hadrian-s-villa-tivoli"}, "gl_-E6iVAg4": {"duration": 296, "path": "khan/math/pre-algebra/order-of-operations/ditributive_property/the-distributive-property/", "keywords": "U01_L4_T2_we1, The, Distributive, Property, CC_3_OA_5, CC_5_OA_1, CC_6_EE_3, CC_6_NS_4, CC_7_EE_1", "id": "gl_-E6iVAg4", "title": "The distributive law of multiplication over addition", "description": "Learn how to apply the distributive law of multiplication over addition and why it works. This is sometimes just called the distributive law or the distributive property.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gl_-E6iVAg4.mp4/gl_-E6iVAg4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gl_-E6iVAg4.mp4/gl_-E6iVAg4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gl_-E6iVAg4.m3u8/gl_-E6iVAg4.m3u8"}, "slug": "the-distributive-property", "video_id": "gl_-E6iVAg4", "youtube_id": "gl_-E6iVAg4", "readable_id": "the-distributive-property"}, "Tczu_dvVuuk": {"duration": 450, "path": "khan/humanities/history/american-civics/american-civics/illinois-pension-obligations/", "keywords": "pension, obligrations, unfunded, defined benefit plan,", "id": "Tczu_dvVuuk", "title": "Illinois pension obligations", "description": "Using Illinois as an example of what happens when pension obligations are underfunded.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Tczu_dvVuuk.mp4/Tczu_dvVuuk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Tczu_dvVuuk.mp4/Tczu_dvVuuk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Tczu_dvVuuk.m3u8/Tczu_dvVuuk.m3u8"}, "slug": "illinois-pension-obligations", "video_id": "Tczu_dvVuuk", "youtube_id": "Tczu_dvVuuk", "readable_id": "illinois-pension-obligations"}, "RXKr2fOYfLM": {"duration": 131, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p13-easier/", "keywords": "", "id": "RXKr2fOYfLM", "title": "Function notation \u2014 Basic example", "description": "Watch Sal work through a basic Function notation problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RXKr2fOYfLM.mp4/RXKr2fOYfLM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RXKr2fOYfLM.mp4/RXKr2fOYfLM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RXKr2fOYfLM.m3u8/RXKr2fOYfLM.m3u8"}, "slug": "sat-math-p13-easier", "video_id": "RXKr2fOYfLM", "youtube_id": "RXKr2fOYfLM", "readable_id": "sat-math-p13-easier"}, "uvmz5E75ZIA": {"duration": 273, "path": "khan/partner-content/wi-phi/value-theory-1/utilitarianism-part-1/", "keywords": "", "id": "uvmz5E75ZIA", "title": "Ethics: Utilitarianism, Part 1", "description": "Julia Markovits (Cornell University) gives an introduction to the moral theory of utilitarianism. Utilitarianism is the view that the right moral action is the one that maximizes happiness for all.\n\nSpeaker: Dr. Julia Markovits, Associate Professor, Sage School of Philosophy, Cornell Universtiy", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uvmz5E75ZIA.mp4/uvmz5E75ZIA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uvmz5E75ZIA.mp4/uvmz5E75ZIA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uvmz5E75ZIA.m3u8/uvmz5E75ZIA.m3u8"}, "slug": "utilitarianism-part-1", "video_id": "uvmz5E75ZIA", "youtube_id": "uvmz5E75ZIA", "readable_id": "utilitarianism-part-1"}, "WR9qCSXJlyY": {"duration": 335, "path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/matrix-addition-and-subtraction-1/", "keywords": "", "id": "WR9qCSXJlyY", "title": "Matrix addition and subtraction", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WR9qCSXJlyY.mp4/WR9qCSXJlyY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WR9qCSXJlyY.mp4/WR9qCSXJlyY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WR9qCSXJlyY.m3u8/WR9qCSXJlyY.m3u8"}, "slug": "matrix-addition-and-subtraction-1", "video_id": "WR9qCSXJlyY", "youtube_id": "WR9qCSXJlyY", "readable_id": "matrix-addition-and-subtraction-1"}, "iwamZ7r2tTE": {"duration": 682, "path": "khan/test-prep/gmat/problem-solving/gmat-math-47/", "keywords": "GMAT, Math, problem, solving", "id": "iwamZ7r2tTE", "title": "GMAT: Math 47", "description": "221-225, pgs. 182-183", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iwamZ7r2tTE.mp4/iwamZ7r2tTE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iwamZ7r2tTE.mp4/iwamZ7r2tTE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iwamZ7r2tTE.m3u8/iwamZ7r2tTE.m3u8"}, "slug": "gmat-math-47", "video_id": "iwamZ7r2tTE", "youtube_id": "iwamZ7r2tTE", "readable_id": "gmat-math-47"}, "1YYy0DEOpoU": {"duration": 744, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/oil-prices-tutorial/breakdown-of-gas-prices/", "keywords": "oil, gas, refining, spread, crack", "id": "1YYy0DEOpoU", "title": "Breakdown of gas prices", "description": "Where the dollars at the pump go", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1YYy0DEOpoU.mp4/1YYy0DEOpoU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1YYy0DEOpoU.mp4/1YYy0DEOpoU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1YYy0DEOpoU.m3u8/1YYy0DEOpoU.m3u8"}, "slug": "breakdown-of-gas-prices", "video_id": "1YYy0DEOpoU", "youtube_id": "1YYy0DEOpoU", "readable_id": "breakdown-of-gas-prices"}, "jl_gQ-eL3xo": {"duration": 617, "path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/projectile-motion-with-ordered-set-notation/", "keywords": "vector, vectors, ordered, set, physics, precalculus, projectile, motion", "id": "jl_gQ-eL3xo", "title": "Projectile motion with ordered set notation", "description": "Solving the second part to the projectile motion problem (with wind gust) using ordered set vector notation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jl_gQ-eL3xo.mp4/jl_gQ-eL3xo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jl_gQ-eL3xo.mp4/jl_gQ-eL3xo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jl_gQ-eL3xo.m3u8/jl_gQ-eL3xo.m3u8"}, "slug": "projectile-motion-with-ordered-set-notation", "video_id": "jl_gQ-eL3xo", "youtube_id": "jl_gQ-eL3xo", "readable_id": "projectile-motion-with-ordered-set-notation"}, "2TTu0TvB6N0": {"duration": 316, "path": "khan/test-prep/mcat/physical-processes/sound/doppler-effect-for-a-moving-observer/", "keywords": "", "id": "2TTu0TvB6N0", "title": "Doppler effect for a moving observer", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2TTu0TvB6N0.mp4/2TTu0TvB6N0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2TTu0TvB6N0.mp4/2TTu0TvB6N0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2TTu0TvB6N0.m3u8/2TTu0TvB6N0.m3u8"}, "slug": "doppler-effect-for-a-moving-observer", "video_id": "2TTu0TvB6N0", "youtube_id": "2TTu0TvB6N0", "readable_id": "doppler-effect-for-a-moving-observer"}, "yKgp0BYKXlo": {"duration": 222, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-social-science-questions/", "keywords": "", "id": "yKgp0BYKXlo", "title": "Reading: Social science \u2014 How-to Part 2", "description": "Watch Sal work through Part 2 of an SAT Reading: Social science passage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yKgp0BYKXlo.mp4/yKgp0BYKXlo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yKgp0BYKXlo.mp4/yKgp0BYKXlo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yKgp0BYKXlo.m3u8/yKgp0BYKXlo.m3u8"}, "slug": "reading-social-science-questions", "video_id": "yKgp0BYKXlo", "youtube_id": "yKgp0BYKXlo", "readable_id": "reading-social-science-questions"}, "V-5q6tKaRuM": {"duration": 65, "path": "khan/math/algebra/introduction-to-algebra/manipulating-expressions/distributive-property-with-rational-terms/", "keywords": "", "id": "V-5q6tKaRuM", "title": "How to expand an expressions using the distributive property", "description": "Learn how to expand the following expression that has rational coefficients: 6(-4w + 1/2)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/V-5q6tKaRuM.mp4/V-5q6tKaRuM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/V-5q6tKaRuM.mp4/V-5q6tKaRuM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/V-5q6tKaRuM.m3u8/V-5q6tKaRuM.m3u8"}, "slug": "distributive-property-with-rational-terms", "video_id": "V-5q6tKaRuM", "youtube_id": "V-5q6tKaRuM", "readable_id": "distributive-property-with-rational-terms"}, "WqNc6My1aNU": {"duration": 161, "path": "khan/math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders/dividing-polynomials-with-remainders-example/", "keywords": "", "id": "WqNc6My1aNU", "title": "How to find the quotient and remainder of polynomial divided by monomial (example)", "description": "Sal divides (7x^6+x^3+2x+1) by X^2, and writes the solution as q(x)+r(x)/x^2, where the degree of the remainder, r(x), is less than the degree of x^2.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WqNc6My1aNU.mp4/WqNc6My1aNU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WqNc6My1aNU.mp4/WqNc6My1aNU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WqNc6My1aNU.m3u8/WqNc6My1aNU.m3u8"}, "slug": "dividing-polynomials-with-remainders-example", "video_id": "WqNc6My1aNU", "youtube_id": "WqNc6My1aNU", "readable_id": "dividing-polynomials-with-remainders-example"}, "deKCm28TkRo": {"duration": 160, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/interpreting_linear_functions/interpreting-linear-formulas-1/", "keywords": "", "id": "deKCm28TkRo", "title": "Interpreting linear formulas example 1", "description": "Interpreting a linear formula", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/deKCm28TkRo.mp4/deKCm28TkRo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/deKCm28TkRo.mp4/deKCm28TkRo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/deKCm28TkRo.m3u8/deKCm28TkRo.m3u8"}, "slug": "interpreting-linear-formulas-1", "video_id": "deKCm28TkRo", "youtube_id": "deKCm28TkRo", "readable_id": "interpreting-linear-formulas-1"}, "BI-rtfZVXy0": {"duration": 574, "path": "khan/math/geometry/similarity/old_school_similarity/similar-triangles/", "keywords": "triangles, similar, geometry, math, angles, CC_7_G_5, CC_8_G_4, CC_8_G_5", "id": "BI-rtfZVXy0", "title": "Similar triangles", "description": "Introduction to similar triangles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BI-rtfZVXy0.mp4/BI-rtfZVXy0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BI-rtfZVXy0.mp4/BI-rtfZVXy0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BI-rtfZVXy0.m3u8/BI-rtfZVXy0.m3u8"}, "slug": "similar-triangles", "video_id": "BI-rtfZVXy0", "youtube_id": "BI-rtfZVXy0", "readable_id": "similar-triangles"}, "WPimvspI0_c": {"duration": 342, "path": "khan/math/pre-algebra/fractions-pre-alg/equivalent-fractions-pre-alg/fractions-in-lowest-terms/", "keywords": "U02_L1_T4_we2, Fractions, in, lowest, terms, CC_3_NF_3, CC_3_NF_3_a, CC_3_NF_3_b, CC_6_NS_4", "id": "WPimvspI0_c", "title": "Fractions in lowest terms", "description": "Fractions in lowest terms", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WPimvspI0_c.mp4/WPimvspI0_c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WPimvspI0_c.mp4/WPimvspI0_c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WPimvspI0_c.m3u8/WPimvspI0_c.m3u8"}, "slug": "fractions-in-lowest-terms", "video_id": "WPimvspI0_c", "youtube_id": "WPimvspI0_c", "readable_id": "fractions-in-lowest-terms"}, "fqnPabGV6A4": {"duration": 779, "path": "khan/test-prep/iit-jee-subject/iit-jee/simple-differential-equation-example/", "keywords": "2010, IIT, JEE, Paper, Problem, 56, Differential, Equation", "id": "fqnPabGV6A4", "title": "Simple differential equation example", "description": "2010 IIT JEE Paper 1 Problem 56 Differential Equation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fqnPabGV6A4.mp4/fqnPabGV6A4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fqnPabGV6A4.mp4/fqnPabGV6A4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fqnPabGV6A4.m3u8/fqnPabGV6A4.m3u8"}, "slug": "simple-differential-equation-example", "video_id": "fqnPabGV6A4", "youtube_id": "fqnPabGV6A4", "readable_id": "simple-differential-equation-example"}, "Vo6W4kDv0cA": {"duration": 259, "path": "khan/test-prep/mcat/society-and-culture/culture/overview-of-culture/", "keywords": "", "id": "Vo6W4kDv0cA", "title": "Overview of culture", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Vo6W4kDv0cA.mp4/Vo6W4kDv0cA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Vo6W4kDv0cA.mp4/Vo6W4kDv0cA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Vo6W4kDv0cA.m3u8/Vo6W4kDv0cA.m3u8"}, "slug": "overview-of-culture", "video_id": "Vo6W4kDv0cA", "youtube_id": "Vo6W4kDv0cA", "readable_id": "overview-of-culture"}, "9wmvZH5lX_U": {"duration": 203, "path": "khan/test-prep/mcat/individuals-and-society/social-interactions/harlow-monkey-experiments/", "keywords": "", "id": "9wmvZH5lX_U", "title": "Harlow monkey experiments", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9wmvZH5lX_U.mp4/9wmvZH5lX_U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9wmvZH5lX_U.mp4/9wmvZH5lX_U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9wmvZH5lX_U.m3u8/9wmvZH5lX_U.m3u8"}, "slug": "harlow-monkey-experiments", "video_id": "9wmvZH5lX_U", "youtube_id": "9wmvZH5lX_U", "readable_id": "harlow-monkey-experiments"}, "jDNalKBb3aA": {"duration": 722, "path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-6-getting-an-equity-infusion/", "keywords": "bailout, paulson, bernanke, SWF, sovereign, wealth, fund, equity", "id": "jDNalKBb3aA", "title": "Bailout 6: Getting an equity infusion", "description": "The bank gets bailed out by an equity infusion from a sovereign wealth fund.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jDNalKBb3aA.mp4/jDNalKBb3aA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jDNalKBb3aA.mp4/jDNalKBb3aA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jDNalKBb3aA.m3u8/jDNalKBb3aA.m3u8"}, "slug": "bailout-6-getting-an-equity-infusion", "video_id": "jDNalKBb3aA", "youtube_id": "jDNalKBb3aA", "readable_id": "bailout-6-getting-an-equity-infusion"}, "i7idZfS8t8w": {"duration": 992, "path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/using-the-quadratic-formula/", "keywords": "Using, the, Quadratic, Formula, CC_39336_A-REI_4_b", "id": "i7idZfS8t8w", "title": "How to use the quadratic formula", "description": "Introduction to using the quadratic formula.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i7idZfS8t8w.mp4/i7idZfS8t8w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i7idZfS8t8w.mp4/i7idZfS8t8w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i7idZfS8t8w.m3u8/i7idZfS8t8w.m3u8"}, "slug": "using-the-quadratic-formula", "video_id": "i7idZfS8t8w", "youtube_id": "i7idZfS8t8w", "readable_id": "using-the-quadratic-formula"}, "Q9BtOLDr0vg": {"duration": 744, "path": "khan/science/chemistry/oxidation-reduction/electrolytic-cell/electrolysis-of-molten-sodium-chloride/", "keywords": "", "id": "Q9BtOLDr0vg", "title": "Electrolysis of molten sodium chloride", "description": "Example quantitative electrolysis problem using molten sodium chloride.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q9BtOLDr0vg.mp4/Q9BtOLDr0vg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q9BtOLDr0vg.mp4/Q9BtOLDr0vg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q9BtOLDr0vg.m3u8/Q9BtOLDr0vg.m3u8"}, "slug": "electrolysis-of-molten-sodium-chloride", "video_id": "Q9BtOLDr0vg", "youtube_id": "Q9BtOLDr0vg", "readable_id": "electrolysis-of-molten-sodium-chloride"}, "_7VHfuWV-Qg": {"duration": 659, "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/production-possibilities-frontier/", "keywords": "ceteris, paribus, tradeoffs", "id": "_7VHfuWV-Qg", "title": "Production possibilities frontier", "description": "Tradeoffs for a hunter gatherer and the production possibilities frontier. Ceteris Paribus", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_7VHfuWV-Qg.mp4/_7VHfuWV-Qg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_7VHfuWV-Qg.mp4/_7VHfuWV-Qg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_7VHfuWV-Qg.m3u8/_7VHfuWV-Qg.m3u8"}, "slug": "production-possibilities-frontier", "video_id": "_7VHfuWV-Qg", "youtube_id": "_7VHfuWV-Qg", "readable_id": "production-possibilities-frontier"}, "yHOrayogv1E": {"duration": 153, "path": "khan/partner-content/big-history-project/future/looking-forward/bhp-threshold9/", "keywords": "", "id": "yHOrayogv1E", "title": "Threshold 9: The Future", "description": "Big history is not yet finished. How might the lessons of the past eight thresholds inform our expectations for the future? What role will you play in shaping the next threshold of the big history?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yHOrayogv1E.mp4/yHOrayogv1E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yHOrayogv1E.mp4/yHOrayogv1E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yHOrayogv1E.m3u8/yHOrayogv1E.m3u8"}, "slug": "bhp-threshold9", "video_id": "yHOrayogv1E", "youtube_id": "yHOrayogv1E", "readable_id": "bhp-threshold9"}, "SrL6TQbWKJE": {"duration": 651, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/left-ventricular-pressure-vs-time/", "keywords": "", "id": "SrL6TQbWKJE", "title": "Left ventricular pressure vs. time", "description": "Ever wonder exactly how the left ventricle's pressure changes over time? Find out in this color-coded video! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SrL6TQbWKJE.mp4/SrL6TQbWKJE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SrL6TQbWKJE.mp4/SrL6TQbWKJE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SrL6TQbWKJE.m3u8/SrL6TQbWKJE.m3u8"}, "slug": "left-ventricular-pressure-vs-time", "video_id": "SrL6TQbWKJE", "youtube_id": "SrL6TQbWKJE", "readable_id": "left-ventricular-pressure-vs-time"}, "eVme7kuGyuo": {"duration": 305, "path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/intuitively-drawing-the-derivative-of-a-function/", "keywords": "", "id": "eVme7kuGyuo", "title": "Intuitively drawing the derivative of a function", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eVme7kuGyuo.mp4/eVme7kuGyuo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eVme7kuGyuo.mp4/eVme7kuGyuo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eVme7kuGyuo.m3u8/eVme7kuGyuo.m3u8"}, "slug": "intuitively-drawing-the-derivative-of-a-function", "video_id": "eVme7kuGyuo", "youtube_id": "eVme7kuGyuo", "readable_id": "intuitively-drawing-the-derivative-of-a-function"}, "J9BWNiOSGlc": {"duration": 441, "path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/intuition-on-static-and-kinetic-friction-comparisons/", "keywords": "coefficient, static, kinetic, mechanics, force, newton", "id": "J9BWNiOSGlc", "title": "Intuition on static and kinetic friction comparisons", "description": "Why static friction is harder to overcome than kinetic friction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J9BWNiOSGlc.mp4/J9BWNiOSGlc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J9BWNiOSGlc.mp4/J9BWNiOSGlc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J9BWNiOSGlc.m3u8/J9BWNiOSGlc.m3u8"}, "slug": "intuition-on-static-and-kinetic-friction-comparisons", "video_id": "J9BWNiOSGlc", "youtube_id": "J9BWNiOSGlc", "readable_id": "intuition-on-static-and-kinetic-friction-comparisons"}, "MWii7tL0T84": {"duration": 543, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/reactivity-of-carboxylic-acid-derivatives/", "keywords": "", "id": "MWii7tL0T84", "title": "Reactivity of carboxylic acid derivatives", "description": "How to analyze the reactivity of the carboxylic acid derivatives using induction and resonance effects", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MWii7tL0T84.mp4/MWii7tL0T84.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MWii7tL0T84.mp4/MWii7tL0T84.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MWii7tL0T84.m3u8/MWii7tL0T84.m3u8"}, "slug": "reactivity-of-carboxylic-acid-derivatives", "video_id": "MWii7tL0T84", "youtube_id": "MWii7tL0T84", "readable_id": "reactivity-of-carboxylic-acid-derivatives"}, "asLQmxK7ExY": {"duration": 243, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-the-supper-at-emmaus-1601/", "keywords": "Caravaggio, Supper at Emmaus, National Gallery, London, Art History, Smarthistory, Baroque", "id": "asLQmxK7ExY", "title": "Caravaggio, Supper at Emmaus", "description": "Michelangelo Merisi da Caravaggio, The Supper at Emmaus, 1601, oil on canvas, 55 x 77 inches, 141 x 196.2 cm (National Gallery, London) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/asLQmxK7ExY.mp4/asLQmxK7ExY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/asLQmxK7ExY.mp4/asLQmxK7ExY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/asLQmxK7ExY.m3u8/asLQmxK7ExY.m3u8"}, "slug": "caravaggio-the-supper-at-emmaus-1601", "video_id": "asLQmxK7ExY", "youtube_id": "asLQmxK7ExY", "readable_id": "caravaggio-the-supper-at-emmaus-1601"}, "xUSpHmvW14c": {"duration": 283, "path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/what-are-dementia-and-alzheimers/", "keywords": "Dementia (Disease Or Medical Condition),Alzheimer's Disease (Disease Or Medical Condition),Health (Industry)", "id": "xUSpHmvW14c", "title": "What are dementia and Alzheimer's", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xUSpHmvW14c.mp4/xUSpHmvW14c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xUSpHmvW14c.mp4/xUSpHmvW14c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xUSpHmvW14c.m3u8/xUSpHmvW14c.m3u8"}, "slug": "what-are-dementia-and-alzheimers", "video_id": "xUSpHmvW14c", "youtube_id": "xUSpHmvW14c", "readable_id": "what-are-dementia-and-alzheimers"}, "-4s4vYJnIW4": {"duration": 148, "path": "khan/partner-content/pixar/rendering/rendering-2/rendering-5/", "keywords": "", "id": "-4s4vYJnIW4", "title": "1. Ray tracing intutiion", "description": "First let's look at ray tracing in 2D using a simple example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-4s4vYJnIW4.mp4/-4s4vYJnIW4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-4s4vYJnIW4.mp4/-4s4vYJnIW4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-4s4vYJnIW4.m3u8/-4s4vYJnIW4.m3u8"}, "slug": "rendering-5", "video_id": "-4s4vYJnIW4", "youtube_id": "-4s4vYJnIW4", "readable_id": "rendering-5"}, "eB5NVPzBCzM": {"duration": 802, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/sn1-reactions-introduction/", "keywords": "", "id": "eB5NVPzBCzM", "title": "Sn1 reactions introduction", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eB5NVPzBCzM.mp4/eB5NVPzBCzM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eB5NVPzBCzM.mp4/eB5NVPzBCzM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eB5NVPzBCzM.m3u8/eB5NVPzBCzM.m3u8"}, "slug": "sn1-reactions-introduction", "video_id": "eB5NVPzBCzM", "youtube_id": "eB5NVPzBCzM", "readable_id": "sn1-reactions-introduction"}, "pb-wsUpPuI8": {"duration": 495, "path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/solubility-and-the-common-ion-effect/", "keywords": "", "id": "pb-wsUpPuI8", "title": "Solubility and the common-ion effect", "description": "Calculating the molar solubility of lead(II) chloride in a 0.100 M solution of KCl using an ICE table.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pb-wsUpPuI8.mp4/pb-wsUpPuI8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pb-wsUpPuI8.mp4/pb-wsUpPuI8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pb-wsUpPuI8.m3u8/pb-wsUpPuI8.m3u8"}, "slug": "solubility-and-the-common-ion-effect", "video_id": "pb-wsUpPuI8", "youtube_id": "pb-wsUpPuI8", "readable_id": "solubility-and-the-common-ion-effect"}, "AA6RfgP-AHU": {"duration": 646, "path": "khan/math/geometry/right_triangles_topic/pyth_theor/the-pythagorean-theorem/", "keywords": "Introduction, to, the, Pythagorean, Theorem, CC_8_G_6, CC_8_G_7, CC_8_G_8", "id": "AA6RfgP-AHU", "title": "The Pythagorean theorem intro", "description": "Introduction to the Pythagorean Theorem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AA6RfgP-AHU.mp4/AA6RfgP-AHU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AA6RfgP-AHU.mp4/AA6RfgP-AHU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AA6RfgP-AHU.m3u8/AA6RfgP-AHU.m3u8"}, "slug": "the-pythagorean-theorem", "video_id": "AA6RfgP-AHU", "youtube_id": "AA6RfgP-AHU", "readable_id": "the-pythagorean-theorem"}, "m-pRnFIeoNA": {"duration": 77, "path": "khan/math/pre-algebra/fractions-pre-alg/div-fractions-fractions-pre-alg/another-dividing-fractions-example/", "keywords": "", "id": "m-pRnFIeoNA", "title": "Dividing fractions example", "description": "This is a straightforward example of dividing two fractions. We'll make super clear!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m-pRnFIeoNA.mp4/m-pRnFIeoNA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m-pRnFIeoNA.mp4/m-pRnFIeoNA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m-pRnFIeoNA.m3u8/m-pRnFIeoNA.m3u8"}, "slug": "another-dividing-fractions-example", "video_id": "m-pRnFIeoNA", "youtube_id": "m-pRnFIeoNA", "readable_id": "another-dividing-fractions-example"}, "IPxQQNyCxas": {"duration": 719, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/credit-card-interest/institutional-roles-in-issuing-and-processing-credit-cards/", "keywords": "credit, card, processing, visa, interchange, discount", "id": "IPxQQNyCxas", "title": "Institutional roles in issuing and processing credit cards", "description": "The institutions involved in processing your credit credit and how they relate to each other", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IPxQQNyCxas.mp4/IPxQQNyCxas.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IPxQQNyCxas.mp4/IPxQQNyCxas.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IPxQQNyCxas.m3u8/IPxQQNyCxas.m3u8"}, "slug": "institutional-roles-in-issuing-and-processing-credit-cards", "video_id": "IPxQQNyCxas", "youtube_id": "IPxQQNyCxas", "readable_id": "institutional-roles-in-issuing-and-processing-credit-cards"}, "dpnFYrz2fCE": {"duration": 118, "path": "khan/humanities/history/euro-hist/other-fronts-ww1/serbian-losses-in-world-war-i/", "keywords": "", "id": "dpnFYrz2fCE", "title": "Serbian losses in World War I", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dpnFYrz2fCE.mp4/dpnFYrz2fCE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dpnFYrz2fCE.mp4/dpnFYrz2fCE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dpnFYrz2fCE.m3u8/dpnFYrz2fCE.m3u8"}, "slug": "serbian-losses-in-world-war-i", "video_id": "dpnFYrz2fCE", "youtube_id": "dpnFYrz2fCE", "readable_id": "serbian-losses-in-world-war-i"}, "gS6s3MGZlRc": {"duration": 352, "path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/minions-within-reach-of-wizard/", "keywords": "", "id": "gS6s3MGZlRc", "title": "Which minions can the wizard reach", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gS6s3MGZlRc.mp4/gS6s3MGZlRc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gS6s3MGZlRc.mp4/gS6s3MGZlRc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gS6s3MGZlRc.m3u8/gS6s3MGZlRc.m3u8"}, "slug": "minions-within-reach-of-wizard", "video_id": "gS6s3MGZlRc", "youtube_id": "gS6s3MGZlRc", "readable_id": "minions-within-reach-of-wizard"}, "pP-QbnWbg_0": {"duration": 406, "path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/chemcam/", "keywords": "", "id": "pP-QbnWbg_0", "title": "ChemCam", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pP-QbnWbg_0.mp4/pP-QbnWbg_0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pP-QbnWbg_0.mp4/pP-QbnWbg_0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pP-QbnWbg_0.m3u8/pP-QbnWbg_0.m3u8"}, "slug": "chemcam", "video_id": "pP-QbnWbg_0", "youtube_id": "pP-QbnWbg_0", "readable_id": "chemcam"}, "AuX7nPBqDts": {"duration": 462, "path": "khan/math/arithmetic/addition-subtraction/basic_addition/basic-addition/", "keywords": "Math, Addition, Khan, Academy, CC_1_OA_1, CC_1_OA_2, CC_1_OA_3, CC_1_OA_6", "id": "AuX7nPBqDts", "title": "Basic addition", "description": "Introduction to addition. Multiple visual ways to represent addition.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AuX7nPBqDts.mp4/AuX7nPBqDts.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AuX7nPBqDts.mp4/AuX7nPBqDts.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AuX7nPBqDts.m3u8/AuX7nPBqDts.m3u8"}, "slug": "basic-addition", "video_id": "AuX7nPBqDts", "youtube_id": "AuX7nPBqDts", "readable_id": "basic-addition"}, "FNnmseBlvaY": {"duration": 279, "path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/combining-like-terms-3/", "keywords": "", "id": "FNnmseBlvaY", "title": "Combining like terms, but more complicated", "description": "This example of combining like terms in an expression get a little hairy. Listen closely.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FNnmseBlvaY.mp4/FNnmseBlvaY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FNnmseBlvaY.mp4/FNnmseBlvaY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FNnmseBlvaY.m3u8/FNnmseBlvaY.m3u8"}, "slug": "combining-like-terms-3", "video_id": "FNnmseBlvaY", "youtube_id": "FNnmseBlvaY", "readable_id": "combining-like-terms-3"}, "sMOZf4GN3oc": {"duration": 157, "path": "khan/computing/computer-science/cryptography/crypt/caesar-cipher/", "keywords": "caesar cipher, cipher", "id": "sMOZf4GN3oc", "title": "The Caesar cipher", "description": "Brit explains the Caesar cipher, the first popular substitution cipher, and shows how it was broken with \"frequency analysis\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sMOZf4GN3oc.mp4/sMOZf4GN3oc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sMOZf4GN3oc.mp4/sMOZf4GN3oc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sMOZf4GN3oc.m3u8/sMOZf4GN3oc.m3u8"}, "slug": "caesar-cipher", "video_id": "sMOZf4GN3oc", "youtube_id": "sMOZf4GN3oc", "readable_id": "caesar-cipher"}, "ScvuRb6vsz4": {"duration": 644, "path": "khan/math/algebra/introduction-to-algebra/units-algebra/unit-conversion-example-drug-dosage/", "keywords": "drug, dosage, unit, conversion, nursing", "id": "ScvuRb6vsz4", "title": "Unit conversion word problem: drug dosage", "description": "Future doctors and nurses out there, take note. This unit conversion word problem deals with converting drug dosage units, something that is commonly done in hospitals. Give it a try with us.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ScvuRb6vsz4.mp4/ScvuRb6vsz4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ScvuRb6vsz4.mp4/ScvuRb6vsz4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ScvuRb6vsz4.m3u8/ScvuRb6vsz4.m3u8"}, "slug": "unit-conversion-example-drug-dosage", "video_id": "ScvuRb6vsz4", "youtube_id": "ScvuRb6vsz4", "readable_id": "unit-conversion-example-drug-dosage"}, "kNQnnshdNuo": {"duration": 508, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/monosubstituted-cyclohexane/", "keywords": "", "id": "kNQnnshdNuo", "title": "Monosubstituted cyclohexane", "description": "How to draw and analyze the two chair conformations for a monosubstituted cyclohexane", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kNQnnshdNuo.mp4/kNQnnshdNuo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kNQnnshdNuo.mp4/kNQnnshdNuo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kNQnnshdNuo.m3u8/kNQnnshdNuo.m3u8"}, "slug": "monosubstituted-cyclohexane", "video_id": "kNQnnshdNuo", "youtube_id": "kNQnnshdNuo", "readable_id": "monosubstituted-cyclohexane"}, "YhxVBHKB-oY": {"duration": 39, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-9-6/", "keywords": "", "id": "YhxVBHKB-oY", "title": "6 y intercept", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YhxVBHKB-oY.mp4/YhxVBHKB-oY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YhxVBHKB-oY.mp4/YhxVBHKB-oY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YhxVBHKB-oY.m3u8/YhxVBHKB-oY.m3u8"}, "slug": "sat-2010-may-9-6", "video_id": "YhxVBHKB-oY", "youtube_id": "YhxVBHKB-oY", "readable_id": "sat-2010-may-9-6"}, "YjGE-sZhxHQ": {"duration": 149, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/beth-schmidt-wishbone/beth-schmidt-2/", "keywords": "", "id": "YjGE-sZhxHQ", "title": "There better be an authentic need", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YjGE-sZhxHQ.mp4/YjGE-sZhxHQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YjGE-sZhxHQ.mp4/YjGE-sZhxHQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YjGE-sZhxHQ.m3u8/YjGE-sZhxHQ.m3u8"}, "slug": "beth-schmidt-2", "video_id": "YjGE-sZhxHQ", "youtube_id": "YjGE-sZhxHQ", "readable_id": "beth-schmidt-2"}, "dA1u8RD49dU": {"duration": 575, "path": "khan/test-prep/gmat/problem-solving/gmat-math-16/", "keywords": "gmat, math, problem, solving", "id": "dA1u8RD49dU", "title": "GMAT: Math 16", "description": "87-91, pg. 163", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dA1u8RD49dU.mp4/dA1u8RD49dU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dA1u8RD49dU.mp4/dA1u8RD49dU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dA1u8RD49dU.m3u8/dA1u8RD49dU.m3u8"}, "slug": "gmat-math-16", "video_id": "dA1u8RD49dU", "youtube_id": "dA1u8RD49dU", "readable_id": "gmat-math-16"}, "D5NVlAaT-OA": {"duration": 330, "path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/applying-hardy-weinberg/", "keywords": "", "id": "D5NVlAaT-OA", "title": "Applying the Hardy Weinberg equation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D5NVlAaT-OA.mp4/D5NVlAaT-OA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D5NVlAaT-OA.mp4/D5NVlAaT-OA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D5NVlAaT-OA.m3u8/D5NVlAaT-OA.m3u8"}, "slug": "applying-hardy-weinberg", "video_id": "D5NVlAaT-OA", "youtube_id": "D5NVlAaT-OA", "readable_id": "applying-hardy-weinberg"}, "t7NvlTgMsO8": {"duration": 238, "path": "khan/math/differential-calculus/limits_topic/limits_tutorial/numerically-estimating-limit/", "keywords": "", "id": "t7NvlTgMsO8", "title": "Estimating limit numerically", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/t7NvlTgMsO8.mp4/t7NvlTgMsO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/t7NvlTgMsO8.mp4/t7NvlTgMsO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/t7NvlTgMsO8.m3u8/t7NvlTgMsO8.m3u8"}, "slug": "numerically-estimating-limit", "video_id": "t7NvlTgMsO8", "youtube_id": "t7NvlTgMsO8", "readable_id": "numerically-estimating-limit"}, "3X5JMS9_EK8": {"duration": 642, "path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-24/", "keywords": "crash course", "id": "3X5JMS9_EK8", "title": "The Atlantic Slave Trade", "description": "In which John Green teaches you about one of the least funny subjects in history: slavery. John investigates when and where slavery originated, how it changed over the centuries, and how Europeans and colonists in the Americas arrived at the idea that people could own other people based on skin color.\u00a0\n\nSlavery has existed as long as humans have had civilization, but the Atlantic Slave Trade was the height, or depth, of dehumanizing, brutal, chattel slavery. American slavery ended less than 150 years ago. In some parts of the world, it is still going on. So how do we reconcile that with modern life? In a desperate attempt at comic relief, Boba Fett makes an appearance.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3X5JMS9_EK8.mp4/3X5JMS9_EK8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3X5JMS9_EK8.mp4/3X5JMS9_EK8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3X5JMS9_EK8.m3u8/3X5JMS9_EK8.m3u8"}, "slug": "crash-course-world-history-24", "video_id": "3X5JMS9_EK8", "youtube_id": "3X5JMS9_EK8", "readable_id": "crash-course-world-history-24"}, "rfm0wQObxjk": {"duration": 559, "path": "khan/math/linear-algebra/alternate_bases/eigen_everything/linear-algebra-proof-of-formula-for-determining-eigenvalues/", "keywords": "eigenvectors, eigenvalues", "id": "rfm0wQObxjk", "title": "Proof of formula for determining eigenvalues", "description": "Proof of formula for determining Eigenvalues", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rfm0wQObxjk.mp4/rfm0wQObxjk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rfm0wQObxjk.mp4/rfm0wQObxjk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rfm0wQObxjk.m3u8/rfm0wQObxjk.m3u8"}, "slug": "linear-algebra-proof-of-formula-for-determining-eigenvalues", "video_id": "rfm0wQObxjk", "youtube_id": "rfm0wQObxjk", "readable_id": "linear-algebra-proof-of-formula-for-determining-eigenvalues"}, "qlWZJ21O63s": {"duration": 146, "path": "khan/math/geometry/transformations/dilations-scaling/scaling-down-a-triangle-by-half/", "keywords": "", "id": "qlWZJ21O63s", "title": "How to draw the image of a shrinking dilation about the origin (example)", "description": "Sal is given a triangle on the coordinate plane and he draws the image of the triangle under a dilation with scale factor 1/2 about the origin.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qlWZJ21O63s.mp4/qlWZJ21O63s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qlWZJ21O63s.mp4/qlWZJ21O63s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qlWZJ21O63s.m3u8/qlWZJ21O63s.m3u8"}, "slug": "scaling-down-a-triangle-by-half", "video_id": "qlWZJ21O63s", "youtube_id": "qlWZJ21O63s", "readable_id": "scaling-down-a-triangle-by-half"}, "cvA4VN1dpuY": {"duration": 688, "path": "khan/math/algebra2/conics_precalc/conics_precalc_eqs/identifying-conics-2/", "keywords": "conic, section, graphing, hyperbola", "id": "cvA4VN1dpuY", "title": "Identifying a hyperbola from an equation", "description": "Part 2 of identifying and graphing conic sections", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cvA4VN1dpuY.mp4/cvA4VN1dpuY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cvA4VN1dpuY.mp4/cvA4VN1dpuY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cvA4VN1dpuY.m3u8/cvA4VN1dpuY.m3u8"}, "slug": "identifying-conics-2", "video_id": "cvA4VN1dpuY", "youtube_id": "cvA4VN1dpuY", "readable_id": "identifying-conics-2"}, "wxtltXz4zs0": {"duration": 567, "path": "khan/humanities/history/euro-hist/mussolini-fascism/mussolini-becomes-prime-minister/", "keywords": "", "id": "wxtltXz4zs0", "title": "Mussolini becomes Prime Minister", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wxtltXz4zs0.mp4/wxtltXz4zs0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wxtltXz4zs0.mp4/wxtltXz4zs0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wxtltXz4zs0.m3u8/wxtltXz4zs0.m3u8"}, "slug": "mussolini-becomes-prime-minister", "video_id": "wxtltXz4zs0", "youtube_id": "wxtltXz4zs0", "readable_id": "mussolini-becomes-prime-minister"}, "PiQxA9O7Rd8": {"duration": 135, "path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/classifying-shapes-examples/", "keywords": "", "id": "PiQxA9O7Rd8", "title": "Categorizing geometric shapes: practice examples", "description": "Watch and do these example exercises along with us. Remember what you have learned about perpendicular lines, right, obtuse, and acute triangles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PiQxA9O7Rd8.mp4/PiQxA9O7Rd8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PiQxA9O7Rd8.mp4/PiQxA9O7Rd8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PiQxA9O7Rd8.m3u8/PiQxA9O7Rd8.m3u8"}, "slug": "classifying-shapes-examples", "video_id": "PiQxA9O7Rd8", "youtube_id": "PiQxA9O7Rd8", "readable_id": "classifying-shapes-examples"}, "02h9yhc7ruc": {"duration": 374, "path": "khan/math/algebra/quadratics/features-of-quadratic-functions/ex3-completing-the-square/", "keywords": "U10_L1_T2_we3, Completing, the, Square, CC_39336_A-REI_4_a, CC_39336_A-REI_4_b, CC_39336_A-SSE_3_b", "id": "02h9yhc7ruc", "title": "Completing the square for vertex form", "description": "U10_L1_T2_we3 Completing the Square 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/02h9yhc7ruc.mp4/02h9yhc7ruc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/02h9yhc7ruc.mp4/02h9yhc7ruc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/02h9yhc7ruc.m3u8/02h9yhc7ruc.m3u8"}, "slug": "ex3-completing-the-square", "video_id": "02h9yhc7ruc", "youtube_id": "02h9yhc7ruc", "readable_id": "ex3-completing-the-square"}, "_ka1HZS-Egc": {"duration": 802, "path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/geithner-plan-iii/", "keywords": "geithner, timothy, obama, plan, bailout, TALF, TARP", "id": "_ka1HZS-Egc", "title": "Geithner plan 4", "description": "Constructing an investment where an investor gets the same upside while the program limits the downside.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_ka1HZS-Egc.mp4/_ka1HZS-Egc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_ka1HZS-Egc.mp4/_ka1HZS-Egc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_ka1HZS-Egc.m3u8/_ka1HZS-Egc.m3u8"}, "slug": "geithner-plan-iii", "video_id": "_ka1HZS-Egc", "youtube_id": "_ka1HZS-Egc", "readable_id": "geithner-plan-iii"}, "KAJVMnXad7g": {"duration": 220, "path": "khan/test-prep/mcat/individuals-and-society/social-interactions/primary-and-secondary-groups/", "keywords": "", "id": "KAJVMnXad7g", "title": "Primary and secondary groups", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KAJVMnXad7g.mp4/KAJVMnXad7g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KAJVMnXad7g.mp4/KAJVMnXad7g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KAJVMnXad7g.m3u8/KAJVMnXad7g.m3u8"}, "slug": "primary-and-secondary-groups", "video_id": "KAJVMnXad7g", "youtube_id": "KAJVMnXad7g", "readable_id": "primary-and-secondary-groups"}, "zSVrr8K_CiI": {"duration": 192, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/linear-functions-modeling/graphing-linear-functions-2/", "keywords": "", "id": "zSVrr8K_CiI", "title": "Graphing linear functions example 2", "description": "Graphing equation for filling pool", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zSVrr8K_CiI.mp4/zSVrr8K_CiI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zSVrr8K_CiI.mp4/zSVrr8K_CiI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zSVrr8K_CiI.m3u8/zSVrr8K_CiI.m3u8"}, "slug": "graphing-linear-functions-2", "video_id": "zSVrr8K_CiI", "youtube_id": "zSVrr8K_CiI", "readable_id": "graphing-linear-functions-2"}, "-IRkisEtzsk": {"duration": 713, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/fetal-circulation-right-before-birth/", "keywords": "", "id": "-IRkisEtzsk", "title": "Fetal circulation right before birth", "description": "Watch how the blood flows through the fetal circulation and compare it to what happens in the baby's body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-IRkisEtzsk.mp4/-IRkisEtzsk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-IRkisEtzsk.mp4/-IRkisEtzsk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-IRkisEtzsk.m3u8/-IRkisEtzsk.m3u8"}, "slug": "fetal-circulation-right-before-birth", "video_id": "-IRkisEtzsk", "youtube_id": "-IRkisEtzsk", "readable_id": "fetal-circulation-right-before-birth"}, "afM6_VFaIss": {"duration": 869, "path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/self-versus-non-self/", "keywords": "", "id": "afM6_VFaIss", "title": "Self vs. non-self immunity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/afM6_VFaIss.mp4/afM6_VFaIss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/afM6_VFaIss.mp4/afM6_VFaIss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/afM6_VFaIss.m3u8/afM6_VFaIss.m3u8"}, "slug": "self-versus-non-self", "video_id": "afM6_VFaIss", "youtube_id": "afM6_VFaIss", "readable_id": "self-versus-non-self"}, "ESusD8HRLBI": {"duration": 854, "path": "khan/science/physics/torque-angular-momentum/torque-tutorial/moments/", "keywords": "torque, moment, of, force, rotation", "id": "ESusD8HRLBI", "title": "Moments", "description": "Introduction to moments", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ESusD8HRLBI.mp4/ESusD8HRLBI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ESusD8HRLBI.mp4/ESusD8HRLBI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ESusD8HRLBI.m3u8/ESusD8HRLBI.m3u8"}, "slug": "moments", "video_id": "ESusD8HRLBI", "youtube_id": "ESusD8HRLBI", "readable_id": "moments"}, "aDCXPdzyS0s": {"duration": 275, "path": "khan/math/geometry/congruence/working-with-triangles/figuring-out-all-the-angles-for-congruent-triangles-example/", "keywords": "Figuring, out, all, the, angles, for, congruent, triangles, example", "id": "aDCXPdzyS0s", "title": "How to find corresponding angles in congruent triangles (example)", "description": "We write the letters of congruent triangles so their order tells us which parts of corresponding. In this video, Sal uses this notation to solve some angles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aDCXPdzyS0s.mp4/aDCXPdzyS0s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aDCXPdzyS0s.mp4/aDCXPdzyS0s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aDCXPdzyS0s.m3u8/aDCXPdzyS0s.m3u8"}, "slug": "figuring-out-all-the-angles-for-congruent-triangles-example", "video_id": "aDCXPdzyS0s", "youtube_id": "aDCXPdzyS0s", "readable_id": "figuring-out-all-the-angles-for-congruent-triangles-example"}, "eTwnt4G5xE4": {"duration": 295, "path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/triangle-angle-example-2/", "keywords": "Triangle, Angle, Example, 2", "id": "eTwnt4G5xE4", "title": "Triangle angle example 2", "description": "Another example finding angles in triangles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eTwnt4G5xE4.mp4/eTwnt4G5xE4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eTwnt4G5xE4.mp4/eTwnt4G5xE4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eTwnt4G5xE4.m3u8/eTwnt4G5xE4.m3u8"}, "slug": "triangle-angle-example-2", "video_id": "eTwnt4G5xE4", "youtube_id": "eTwnt4G5xE4", "readable_id": "triangle-angle-example-2"}, "K6BKDveCd9w": {"duration": 280, "path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/pieter-bruegel-the-elder-the-tower-of-babel-1563/", "keywords": "Bruegel, Tower, Babel, GAP, Google Art Project, Smarthistory, Khan Academy, Pieter Bruegel, Pieter Bruegel the Elder, Tower of Babel, 1563, Kunsthistorisches, Vienna, Vien, Netherlandish, Flemish, Renaissance, Landscape, Painted Architecture, Biblical Architecture, Art History, Painting", "id": "K6BKDveCd9w", "title": "Bruegel, Tower of Babel", "description": "Pieter Bruegel the Elder, The Tower of Babel, 1563, oil on panel, 114 \u00d7 155 cm (Kunsthistorisches Museum, Vienna). In the Google Art Project: http://www.googleartproject.com/collection/kunsthistorisches-museum-vienna-museum-of-fine-arts/artwork/the-tower-of-babel-pieter-bruegel-the-elder/807533/", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K6BKDveCd9w.mp4/K6BKDveCd9w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K6BKDveCd9w.mp4/K6BKDveCd9w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K6BKDveCd9w.m3u8/K6BKDveCd9w.m3u8"}, "slug": "pieter-bruegel-the-elder-the-tower-of-babel-1563", "video_id": "K6BKDveCd9w", "youtube_id": "K6BKDveCd9w", "readable_id": "pieter-bruegel-the-elder-the-tower-of-babel-1563"}, "4BtXvopHXI8": {"duration": 114, "path": "khan/math/arithmetic/multiplication-division/multi_digit_multiplication/3-digit-times-1-digit-example-no-carrying/", "keywords": "", "id": "4BtXvopHXI8", "title": "Multiplying: 3 digits times 1 digit", "description": "How about this example? We're going to multiply a 3 digit number by a 1 digit number. Again, no carrying involved.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4BtXvopHXI8.mp4/4BtXvopHXI8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4BtXvopHXI8.mp4/4BtXvopHXI8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4BtXvopHXI8.m3u8/4BtXvopHXI8.m3u8"}, "slug": "3-digit-times-1-digit-example-no-carrying", "video_id": "4BtXvopHXI8", "youtube_id": "4BtXvopHXI8", "readable_id": "3-digit-times-1-digit-example-no-carrying"}, "EGNlXtjYABw": {"duration": 1271, "path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/visualizing-a-column-space-as-a-plane-in-r3/", "keywords": "column, space, matrix, plane, equation", "id": "EGNlXtjYABw", "title": "Visualizing a column space as a plane in R3", "description": "Determining the planar equation for a column space in R3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EGNlXtjYABw.mp4/EGNlXtjYABw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EGNlXtjYABw.mp4/EGNlXtjYABw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EGNlXtjYABw.m3u8/EGNlXtjYABw.m3u8"}, "slug": "visualizing-a-column-space-as-a-plane-in-r3", "video_id": "EGNlXtjYABw", "youtube_id": "EGNlXtjYABw", "readable_id": "visualizing-a-column-space-as-a-plane-in-r3"}, "3qP8OOr7pfI": {"duration": 301, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/hedge-fund-strategies-merger-arbitrage-1/", "keywords": "finance, accounting, capital, markets", "id": "3qP8OOr7pfI", "title": "Hedge fund strategies: Merger arbitrage 1", "description": "Simple case of merger arbitrage when there is an all cash acquisition", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3qP8OOr7pfI.mp4/3qP8OOr7pfI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3qP8OOr7pfI.mp4/3qP8OOr7pfI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3qP8OOr7pfI.m3u8/3qP8OOr7pfI.m3u8"}, "slug": "hedge-fund-strategies-merger-arbitrage-1", "video_id": "3qP8OOr7pfI", "youtube_id": "3qP8OOr7pfI", "readable_id": "hedge-fund-strategies-merger-arbitrage-1"}, "-nve3n7WD0w": {"duration": 454, "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-student-experience-overview/sscc-blended-environment/", "keywords": "", "id": "-nve3n7WD0w", "title": "The learning environment in the protagonist schools", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-nve3n7WD0w.mp4/-nve3n7WD0w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-nve3n7WD0w.mp4/-nve3n7WD0w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-nve3n7WD0w.m3u8/-nve3n7WD0w.m3u8"}, "slug": "sscc-blended-environment", "video_id": "-nve3n7WD0w", "youtube_id": "-nve3n7WD0w", "readable_id": "sscc-blended-environment"}, "0TRjw-Ot9Pc": {"duration": 232, "path": "khan/humanities/art-asia/himalayas/tibet/simhavaktra-dakini/", "keywords": "Tibet, Tibetan art", "id": "0TRjw-Ot9Pc", "title": "The Buddhist deity Simhavaktra Dakini", "description": "Simhavaktra Dakini, the ferocious lion-faced guardian of Vajrayana Buddhism, is a female \u201csky-walker\u201d\u00a0who guides human beings along the right path. This powerful spirit can remove physical hindrances and\u00a0spiritual obstacles such as pride and ego. When she is portrayed alone, like here, she dances gracefully; her\u00a0right leg is raised and bent, and her left leg would usually be planted on a prostrate demonic figure, which\u00a0in this case is missing. Originally she would have held a chopper (a curved, chopping knife) in her right\u00a0hand and a bowl made from a human skull in her left. These are also missing. She is naked except for\u00a0jewelry (originally inset with semiprecious stones), a tiger skin is wrapped around her waist, and human\u00a0skin is knotted around her shoulders.\nTogether with Makaravaktra Dakini (a crocodile-headed dakini), Simhavaktra attends Penden Lhamo, the only female goddess among the Eight Guardians of the Dharma who protect the teachings\u00a0of the Buddha. She is a special inner protectress of various lineages including the Gelukpa Order and its\u00a0two leaders, the Dalai and Panchen Lamas.\u00a0\n\nThe size and quality of this piece indicate it was an imperial object made for the Qing dynasty\u00a0(1644\u20131911) court in China. Learn more on the\u00a0Asian Art Museum's education website.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0TRjw-Ot9Pc.mp4/0TRjw-Ot9Pc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0TRjw-Ot9Pc.mp4/0TRjw-Ot9Pc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0TRjw-Ot9Pc.m3u8/0TRjw-Ot9Pc.m3u8"}, "slug": "simhavaktra-dakini", "video_id": "0TRjw-Ot9Pc", "youtube_id": "0TRjw-Ot9Pc", "readable_id": "simhavaktra-dakini"}, "NH1_sO8QY3o": {"duration": 588, "path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/visual-understanding-of-centripetal-acceleration-formula/", "keywords": "physics", "id": "NH1_sO8QY3o", "title": "Visual understanding of centripetal acceleration formula", "description": "Visual understanding of how centripetal acceleration relates to velocity and radius", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NH1_sO8QY3o.mp4/NH1_sO8QY3o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NH1_sO8QY3o.mp4/NH1_sO8QY3o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NH1_sO8QY3o.m3u8/NH1_sO8QY3o.m3u8"}, "slug": "visual-understanding-of-centripetal-acceleration-formula", "video_id": "NH1_sO8QY3o", "youtube_id": "NH1_sO8QY3o", "readable_id": "visual-understanding-of-centripetal-acceleration-formula"}, "wyWy4PouQxQ": {"duration": 259, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-sub-100-word-problems/snow-on-friday/", "keywords": "", "id": "wyWy4PouQxQ", "title": "Snow on Friday", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wyWy4PouQxQ.mp4/wyWy4PouQxQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wyWy4PouQxQ.mp4/wyWy4PouQxQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wyWy4PouQxQ.m3u8/wyWy4PouQxQ.m3u8"}, "slug": "snow-on-friday", "video_id": "wyWy4PouQxQ", "youtube_id": "wyWy4PouQxQ", "readable_id": "snow-on-friday"}, "jo1bjsBbcc8": {"duration": 399, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-chassis-timelapse-mov/", "keywords": "Bit-zee's body, Bit-zee's chassis, robot frame, robot structure", "id": "jo1bjsBbcc8", "title": "Chassis/frame", "description": "In this video we show you how to craft the chassis for the Bit-zee using a $3 piece of Lexan and tap light housing", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jo1bjsBbcc8.mp4/jo1bjsBbcc8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jo1bjsBbcc8.mp4/jo1bjsBbcc8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jo1bjsBbcc8.m3u8/jo1bjsBbcc8.m3u8"}, "slug": "bit-zee-s-chassis-timelapse-mov", "video_id": "jo1bjsBbcc8", "youtube_id": "jo1bjsBbcc8", "readable_id": "bit-zee-s-chassis-timelapse-mov"}, "VpuN8vCQ--M": {"duration": 539, "path": "khan/math/probability/random-variables-topic/expected-value/law-of-large-numbers/", "keywords": "probability, law, of, large, numbers, statistics, CC_6_SP_5_c, CC_7_SP_1, CC_7_SP_2, CC_8_SP_1", "id": "VpuN8vCQ--M", "title": "Law of large numbers", "description": "Introduction to the law of large numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VpuN8vCQ--M.mp4/VpuN8vCQ--M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VpuN8vCQ--M.mp4/VpuN8vCQ--M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VpuN8vCQ--M.m3u8/VpuN8vCQ--M.m3u8"}, "slug": "law-of-large-numbers", "video_id": "VpuN8vCQ--M", "youtube_id": "VpuN8vCQ--M", "readable_id": "law-of-large-numbers"}, "4GW-PORTvfo": {"duration": 299, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/richter-betty/", "keywords": "art, art history, German, painting, contemporary, naturalism, Betty, Richter, Gerhard Richter", "id": "4GW-PORTvfo", "title": "Gerhard Richter, Betty", "description": "Salman Khan and Steven Zucker discuss Gerhard Richter's Betty, 1988, oil on canvas, 102 x 72 cm. (Saint Louis Art Museum)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4GW-PORTvfo.mp4/4GW-PORTvfo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4GW-PORTvfo.mp4/4GW-PORTvfo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4GW-PORTvfo.m3u8/4GW-PORTvfo.m3u8"}, "slug": "richter-betty", "video_id": "4GW-PORTvfo", "youtube_id": "4GW-PORTvfo", "readable_id": "richter-betty"}, "oKpsU7sVwjc": {"duration": 627, "path": "khan/partner-content/wi-phi/value-theory-1/the-nonidentity-problem-part-2/", "keywords": "Ethics (Quotation Subject),Philosophy (Field Of Study),Molly Gardner,Bowling Green State University (College/University),Climate Change (Website Category),Morality (Quotation Subject),non identity problem,Wireless Philosophy,Khan Academy (Nonprofit Organization),Wiphi,Applied Ethics,Harm,Metaphysics (Field Of Study),Personal Identity (Quotation Subject)", "id": "oKpsU7sVwjc", "title": "Ethics: The Nonidentity Problem, Part 2", "description": "In this video, Molly Gardner introduces the nonidentity problem. This problem arises in cases where an individual appears to be wronged by the very action upon which his or her own existence depends.\n\nSpeaker: Dr. Molly Gardner, Assistant Professor of Philosophy, Bowling Green State University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oKpsU7sVwjc.mp4/oKpsU7sVwjc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oKpsU7sVwjc.mp4/oKpsU7sVwjc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oKpsU7sVwjc.m3u8/oKpsU7sVwjc.m3u8"}, "slug": "the-nonidentity-problem-part-2", "video_id": "oKpsU7sVwjc", "youtube_id": "oKpsU7sVwjc", "readable_id": "the-nonidentity-problem-part-2"}, "e_Us5TGPFe0": {"duration": 207, "path": "khan/humanities/medieval-world/medieval-europe/manuscripts/", "keywords": "", "id": "e_Us5TGPFe0", "title": "Manuscripts: major works of art", "description": "Illuminated manuscripts are books from early medieval times through the Renaissance. Considered major works of art, they were written and decorated by hand with gold, silver, lapis, and other precious materials. Explore several exemplars, including the finest German illuminated manuscript of the 12th century, the Stammheim Missal, as well as other religious and secular works. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e_Us5TGPFe0.mp4/e_Us5TGPFe0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e_Us5TGPFe0.mp4/e_Us5TGPFe0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e_Us5TGPFe0.m3u8/e_Us5TGPFe0.m3u8"}, "slug": "manuscripts", "video_id": "e_Us5TGPFe0", "youtube_id": "e_Us5TGPFe0", "readable_id": "manuscripts"}, "LjC-H-RAclc": {"duration": 45, "path": "khan/science/discoveries-projects/discoveries/magnetism/discovery-of-magnetic-poles-two-compass-needles/", "keywords": "magnetic pole", "id": "LjC-H-RAclc", "title": "Compass interactions", "description": "If we float two identically magnetized needles they will always orient themselves in the same way. Why?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LjC-H-RAclc.mp4/LjC-H-RAclc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LjC-H-RAclc.mp4/LjC-H-RAclc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LjC-H-RAclc.m3u8/LjC-H-RAclc.m3u8"}, "slug": "discovery-of-magnetic-poles-two-compass-needles", "video_id": "LjC-H-RAclc", "youtube_id": "LjC-H-RAclc", "readable_id": "discovery-of-magnetic-poles-two-compass-needles"}, "V7vCaxe3Rys": {"duration": 725, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-21/", "keywords": "gmat, data, sufficiency", "id": "V7vCaxe3Rys", "title": "GMAT: Data sufficiency 21", "description": "91-94, pgs. 285-286", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/V7vCaxe3Rys.mp4/V7vCaxe3Rys.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/V7vCaxe3Rys.mp4/V7vCaxe3Rys.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/V7vCaxe3Rys.m3u8/V7vCaxe3Rys.m3u8"}, "slug": "gmat-data-sufficiency-21", "video_id": "V7vCaxe3Rys", "youtube_id": "V7vCaxe3Rys", "readable_id": "gmat-data-sufficiency-21"}, "xjkSE9cPqzo": {"duration": 902, "path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/limit-examples-w-brain-malfunction-on-first-prob-part-4/", "keywords": "calculus, CC_39336_A-REI_4, CC_39336_A-SSE_3_a", "id": "xjkSE9cPqzo", "title": "Limit examples w/ brain malfunction on first prob (part 4)", "description": "3 interesting limit examples (correct answer for problem 1 is 3/16 (6/(4*8) NOT 6/(4+8))", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xjkSE9cPqzo.mp4/xjkSE9cPqzo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xjkSE9cPqzo.mp4/xjkSE9cPqzo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xjkSE9cPqzo.m3u8/xjkSE9cPqzo.m3u8"}, "slug": "limit-examples-w-brain-malfunction-on-first-prob-part-4", "video_id": "xjkSE9cPqzo", "youtube_id": "xjkSE9cPqzo", "readable_id": "limit-examples-w-brain-malfunction-on-first-prob-part-4"}, "KV_XLL4K2Fw": {"duration": 120, "path": "khan/math/algebra-basics/core-algebra-graphing-lines-slope/core-algebra-equation-of-a-line/finding-y-intercept-given-slope-and-point/", "keywords": "", "id": "KV_XLL4K2Fw", "title": "Finding y intercept given slope and point", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KV_XLL4K2Fw.mp4/KV_XLL4K2Fw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KV_XLL4K2Fw.mp4/KV_XLL4K2Fw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KV_XLL4K2Fw.m3u8/KV_XLL4K2Fw.m3u8"}, "slug": "finding-y-intercept-given-slope-and-point", "video_id": "KV_XLL4K2Fw", "youtube_id": "KV_XLL4K2Fw", "readable_id": "finding-y-intercept-given-slope-and-point"}, "fJHFM2dOmiY": {"duration": 134, "path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-mathblock/", "keywords": "", "id": "fJHFM2dOmiY", "title": "Math block", "description": "Math blocks allow you to scale values (and much more!)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fJHFM2dOmiY.mp4/fJHFM2dOmiY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fJHFM2dOmiY.mp4/fJHFM2dOmiY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fJHFM2dOmiY.m3u8/fJHFM2dOmiY.m3u8"}, "slug": "lego-mathblock", "video_id": "fJHFM2dOmiY", "youtube_id": "fJHFM2dOmiY", "readable_id": "lego-mathblock"}, "rzXRZFMcZyU": {"duration": 524, "path": "khan/test-prep/mcat/chemical-processes/stereochemistry/rs-system-practice-new/", "keywords": "R configuration,S configuration,Stereochemistry (Field Of Study),RS system", "id": "rzXRZFMcZyU", "title": "R,S system practice", "description": "How to assign a configuration to a chirality center using the R,S system", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rzXRZFMcZyU.mp4/rzXRZFMcZyU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rzXRZFMcZyU.mp4/rzXRZFMcZyU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rzXRZFMcZyU.m3u8/rzXRZFMcZyU.m3u8"}, "slug": "rs-system-practice-new", "video_id": "rzXRZFMcZyU", "youtube_id": "rzXRZFMcZyU", "readable_id": "rs-system-practice-new"}, "QMv4kxATfzs": {"duration": 92, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/supernova-clarification/", "keywords": "SuperNova, (SuperNovae), nova, massive, stars", "id": "QMv4kxATfzs", "title": "Supernova clarification", "description": "Supernova clarification", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QMv4kxATfzs.mp4/QMv4kxATfzs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QMv4kxATfzs.mp4/QMv4kxATfzs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QMv4kxATfzs.m3u8/QMv4kxATfzs.m3u8"}, "slug": "supernova-clarification", "video_id": "QMv4kxATfzs", "youtube_id": "QMv4kxATfzs", "readable_id": "supernova-clarification"}, "43j2gGEP4JI": {"duration": 29, "path": "khan/science/discoveries-projects/lego-robotics/lego-sensors/lego-nxt-light-guitar/", "keywords": "", "id": "43j2gGEP4JI", "title": "Demo: light guitar", "description": "Light guitar in action!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/43j2gGEP4JI.mp4/43j2gGEP4JI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/43j2gGEP4JI.mp4/43j2gGEP4JI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/43j2gGEP4JI.m3u8/43j2gGEP4JI.m3u8"}, "slug": "lego-nxt-light-guitar", "video_id": "43j2gGEP4JI", "youtube_id": "43j2gGEP4JI", "readable_id": "lego-nxt-light-guitar"}, "wQHcz7U01M4": {"duration": 176, "path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-1-note-values-duration-and-time-signatures/", "keywords": "", "id": "wQHcz7U01M4", "title": "Lesson 1: Note values, duration, and time signatures", "description": "Definitions and basic concepts", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wQHcz7U01M4.mp4/wQHcz7U01M4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wQHcz7U01M4.mp4/wQHcz7U01M4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wQHcz7U01M4.m3u8/wQHcz7U01M4.m3u8"}, "slug": "lesson-1-note-values-duration-and-time-signatures", "video_id": "wQHcz7U01M4", "youtube_id": "wQHcz7U01M4", "readable_id": "lesson-1-note-values-duration-and-time-signatures"}, "WSpF5uvApLA": {"duration": 310, "path": "khan/math/algebra/systems-of-linear-equations/possible-number-of-solutions-of-systems-of-linear-equations/independent-and-dependent-systems/", "keywords": "u14_l1_t1_we4, Independent, and, Dependent, Systems, CC_8_EE_8_a, CC_8_EE_8_b, CC_39336_A-REI_6", "id": "WSpF5uvApLA", "title": "Dependent and independent systems of equations", "description": "Sal determines whether a given system is dependent or not. Don't know what \"dependent system\" means? Watch this!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WSpF5uvApLA.mp4/WSpF5uvApLA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WSpF5uvApLA.mp4/WSpF5uvApLA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WSpF5uvApLA.m3u8/WSpF5uvApLA.m3u8"}, "slug": "independent-and-dependent-systems", "video_id": "WSpF5uvApLA", "youtube_id": "WSpF5uvApLA", "readable_id": "independent-and-dependent-systems"}, "Rc1CezZgggM": {"duration": 709, "path": "khan/science/organic-chemistry/alkenes-alkynes/synthesis-alkynes/synthesis-using-alkynes/", "keywords": "", "id": "Rc1CezZgggM", "title": "Synthesis using alkynes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Rc1CezZgggM.mp4/Rc1CezZgggM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Rc1CezZgggM.mp4/Rc1CezZgggM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Rc1CezZgggM.m3u8/Rc1CezZgggM.m3u8"}, "slug": "synthesis-using-alkynes", "video_id": "Rc1CezZgggM", "youtube_id": "Rc1CezZgggM", "readable_id": "synthesis-using-alkynes"}, "ZJ39gHgz_Dk": {"duration": 265, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-sub-100-word-problems/using-crayons/", "keywords": "", "id": "ZJ39gHgz_Dk", "title": "Using crayons", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZJ39gHgz_Dk.mp4/ZJ39gHgz_Dk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZJ39gHgz_Dk.mp4/ZJ39gHgz_Dk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZJ39gHgz_Dk.m3u8/ZJ39gHgz_Dk.m3u8"}, "slug": "using-crayons", "video_id": "ZJ39gHgz_Dk", "youtube_id": "ZJ39gHgz_Dk", "readable_id": "using-crayons"}, "ka8Yt4bTODs": {"duration": 605, "path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-4-electron-clouds/", "keywords": "", "id": "ka8Yt4bTODs", "title": "VSEPR for 4 electron clouds", "description": "VSEPR for molecules with four electron clouds including examples for tetrahedral, trigonal pyramidal, and bent molecules.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ka8Yt4bTODs.mp4/ka8Yt4bTODs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ka8Yt4bTODs.mp4/ka8Yt4bTODs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ka8Yt4bTODs.m3u8/ka8Yt4bTODs.m3u8"}, "slug": "vsepr-for-4-electron-clouds", "video_id": "ka8Yt4bTODs", "youtube_id": "ka8Yt4bTODs", "readable_id": "vsepr-for-4-electron-clouds"}, "IE9hAzVAGeY": {"duration": 552, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-syphilis/", "keywords": "", "id": "IE9hAzVAGeY", "title": "What is syphilis?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IE9hAzVAGeY.mp4/IE9hAzVAGeY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IE9hAzVAGeY.mp4/IE9hAzVAGeY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IE9hAzVAGeY.m3u8/IE9hAzVAGeY.m3u8"}, "slug": "what-is-syphilis", "video_id": "IE9hAzVAGeY", "youtube_id": "IE9hAzVAGeY", "readable_id": "what-is-syphilis"}, "Xe6YlrCgkIo": {"duration": 692, "path": "khan/math/differential-calculus/derivative_applications/rates_of_change/related-rates-of-water-pouring-into-cone/", "keywords": "", "id": "Xe6YlrCgkIo", "title": "Related rates of water pouring into cone", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Xe6YlrCgkIo.mp4/Xe6YlrCgkIo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Xe6YlrCgkIo.mp4/Xe6YlrCgkIo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Xe6YlrCgkIo.m3u8/Xe6YlrCgkIo.m3u8"}, "slug": "related-rates-of-water-pouring-into-cone", "video_id": "Xe6YlrCgkIo", "youtube_id": "Xe6YlrCgkIo", "readable_id": "related-rates-of-water-pouring-into-cone"}, "gw-4wltP5tY": {"duration": 598, "path": "khan/test-prep/iit-jee-subject/iit-jee/normal-vector-from-plane-equation/", "keywords": "linear, algebra, normal, vector, equation, plane", "id": "gw-4wltP5tY", "title": "Normal vector from plane equation", "description": "Figuring out a normal vector to a plane from its equation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gw-4wltP5tY.mp4/gw-4wltP5tY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gw-4wltP5tY.mp4/gw-4wltP5tY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gw-4wltP5tY.m3u8/gw-4wltP5tY.m3u8"}, "slug": "normal-vector-from-plane-equation", "video_id": "gw-4wltP5tY", "youtube_id": "gw-4wltP5tY", "readable_id": "normal-vector-from-plane-equation"}, "vDwzmJpI4io": {"duration": 2922, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/elon-musk/", "keywords": "", "id": "vDwzmJpI4io", "title": "Elon Musk - CEO of Tesla Motors and SpaceX", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vDwzmJpI4io.mp4/vDwzmJpI4io.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vDwzmJpI4io.mp4/vDwzmJpI4io.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vDwzmJpI4io.m3u8/vDwzmJpI4io.m3u8"}, "slug": "elon-musk", "video_id": "vDwzmJpI4io", "youtube_id": "vDwzmJpI4io", "readable_id": "elon-musk"}, "2f7YwCtHcgk": {"duration": 859, "path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/introduction-to-cellular-respiration/", "keywords": "cellular, respiration, glycolysis, kreb's, cycle, electron, transport, chain", "id": "2f7YwCtHcgk", "title": "Introduction to cellular respiration", "description": "Introduction to cellular respiration, including glycolysis, the Krebs Cycle, and the electron transport chain.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2f7YwCtHcgk.mp4/2f7YwCtHcgk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2f7YwCtHcgk.mp4/2f7YwCtHcgk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2f7YwCtHcgk.m3u8/2f7YwCtHcgk.m3u8"}, "slug": "introduction-to-cellular-respiration", "video_id": "2f7YwCtHcgk", "youtube_id": "2f7YwCtHcgk", "readable_id": "introduction-to-cellular-respiration"}, "iRjCDGpjJ3I": {"duration": 548, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/shock-oxygen-delivery-and-metabolism/", "keywords": "", "id": "iRjCDGpjJ3I", "title": "Shock - oxygen delivery and metabolism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iRjCDGpjJ3I.mp4/iRjCDGpjJ3I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iRjCDGpjJ3I.mp4/iRjCDGpjJ3I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iRjCDGpjJ3I.m3u8/iRjCDGpjJ3I.m3u8"}, "slug": "shock-oxygen-delivery-and-metabolism", "video_id": "iRjCDGpjJ3I", "youtube_id": "iRjCDGpjJ3I", "readable_id": "shock-oxygen-delivery-and-metabolism"}, "ROIfbUQrSY4": {"duration": 81, "path": "khan/math/algebra-basics/core-algebra-foundations/square-roots-for-college/understanding-square-roots/", "keywords": "U01_L5_T1_we3, Understanding, Square, Roots, CC_8_EE_2", "id": "ROIfbUQrSY4", "title": "Understanding square roots", "description": "Understanding Square Roots", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ROIfbUQrSY4.mp4/ROIfbUQrSY4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ROIfbUQrSY4.mp4/ROIfbUQrSY4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ROIfbUQrSY4.m3u8/ROIfbUQrSY4.m3u8"}, "slug": "understanding-square-roots", "video_id": "ROIfbUQrSY4", "youtube_id": "ROIfbUQrSY4", "readable_id": "understanding-square-roots"}, "w56Vuf9tHfA": {"duration": 689, "path": "khan/math/algebra2/conics_precalc/parabolas_precalc/finding-focus-and-directrix-from-vertex/", "keywords": "", "id": "w56Vuf9tHfA", "title": "Finding focus and directrix from vertex", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w56Vuf9tHfA.mp4/w56Vuf9tHfA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w56Vuf9tHfA.mp4/w56Vuf9tHfA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w56Vuf9tHfA.m3u8/w56Vuf9tHfA.m3u8"}, "slug": "finding-focus-and-directrix-from-vertex", "video_id": "w56Vuf9tHfA", "youtube_id": "w56Vuf9tHfA", "readable_id": "finding-focus-and-directrix-from-vertex"}, "-MYh3s__qlA": {"duration": 169, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2008-may-8-15/", "keywords": "", "id": "-MYh3s__qlA", "title": "15 Sums of terms in a sequence", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-MYh3s__qlA.mp4/-MYh3s__qlA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-MYh3s__qlA.mp4/-MYh3s__qlA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-MYh3s__qlA.m3u8/-MYh3s__qlA.m3u8"}, "slug": "sat-2008-may-8-15", "video_id": "-MYh3s__qlA", "youtube_id": "-MYh3s__qlA", "readable_id": "sat-2008-may-8-15"}, "10LuSfZZa3E": {"duration": 685, "path": "khan/science/physics/geometric-optics/reflection-refraction/snell-s-law-example-2/", "keywords": "Snell's, Law, Example", "id": "10LuSfZZa3E", "title": "Snell's law example 2", "description": "Snell's Law Example 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/10LuSfZZa3E.mp4/10LuSfZZa3E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/10LuSfZZa3E.mp4/10LuSfZZa3E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/10LuSfZZa3E.m3u8/10LuSfZZa3E.m3u8"}, "slug": "snell-s-law-example-2", "video_id": "10LuSfZZa3E", "youtube_id": "10LuSfZZa3E", "readable_id": "snell-s-law-example-2"}, "xUFwzPmqt0Y": {"duration": 552, "path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/friedel-crafts-acylation-1/", "keywords": "", "id": "xUFwzPmqt0Y", "title": "Friedel-Crafts acylation", "description": "The mechanism of acylation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xUFwzPmqt0Y.mp4/xUFwzPmqt0Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xUFwzPmqt0Y.mp4/xUFwzPmqt0Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xUFwzPmqt0Y.m3u8/xUFwzPmqt0Y.m3u8"}, "slug": "friedel-crafts-acylation-1", "video_id": "xUFwzPmqt0Y", "youtube_id": "xUFwzPmqt0Y", "readable_id": "friedel-crafts-acylation-1"}, "Jpbm5YgciqI": {"duration": 146, "path": "khan/math/probability/regression/prob-stats-scatter-plots/scatter-plot-interpreting/", "keywords": "", "id": "Jpbm5YgciqI", "title": "Studying, shoe size, and test scores scatter plots", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Jpbm5YgciqI.mp4/Jpbm5YgciqI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Jpbm5YgciqI.mp4/Jpbm5YgciqI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Jpbm5YgciqI.m3u8/Jpbm5YgciqI.m3u8"}, "slug": "scatter-plot-interpreting", "video_id": "Jpbm5YgciqI", "youtube_id": "Jpbm5YgciqI", "readable_id": "scatter-plot-interpreting"}, "rai9hJOGJLE": {"duration": 210, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/sat-2-defying-oppression/", "keywords": "", "id": "rai9hJOGJLE", "title": "2 Defying oppression", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rai9hJOGJLE.mp4/rai9hJOGJLE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rai9hJOGJLE.mp4/rai9hJOGJLE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rai9hJOGJLE.m3u8/rai9hJOGJLE.m3u8"}, "slug": "sat-2-defying-oppression", "video_id": "rai9hJOGJLE", "youtube_id": "rai9hJOGJLE", "readable_id": "sat-2-defying-oppression"}, "4GUm8ybncWY": {"duration": 636, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/hypoplastic-left-heart-syndrome-and-norwood-glenn-fontan/", "keywords": "", "id": "4GUm8ybncWY", "title": "Hypoplastic left heart syndrome and norwood glenn fontan", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4GUm8ybncWY.mp4/4GUm8ybncWY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4GUm8ybncWY.mp4/4GUm8ybncWY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4GUm8ybncWY.m3u8/4GUm8ybncWY.m3u8"}, "slug": "hypoplastic-left-heart-syndrome-and-norwood-glenn-fontan", "video_id": "4GUm8ybncWY", "youtube_id": "4GUm8ybncWY", "readable_id": "hypoplastic-left-heart-syndrome-and-norwood-glenn-fontan"}, "EHR-YDwrrhM": {"duration": 431, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/graphing-solutions-to-2-variable-linear-equations-1/", "keywords": "", "id": "EHR-YDwrrhM", "title": "Graphing solutions to two-variable linear equations example 2", "description": "Graphing solutions to 2 variable linear equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EHR-YDwrrhM.mp4/EHR-YDwrrhM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EHR-YDwrrhM.mp4/EHR-YDwrrhM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EHR-YDwrrhM.m3u8/EHR-YDwrrhM.m3u8"}, "slug": "graphing-solutions-to-2-variable-linear-equations-1", "video_id": "EHR-YDwrrhM", "youtube_id": "EHR-YDwrrhM", "readable_id": "graphing-solutions-to-2-variable-linear-equations-1"}, "86iNZaZ0S84": {"duration": 585, "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/multiplicity-n-1-rule/", "keywords": "", "id": "86iNZaZ0S84", "title": "Multiplicity: n + 1 rule", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/86iNZaZ0S84.mp4/86iNZaZ0S84.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/86iNZaZ0S84.mp4/86iNZaZ0S84.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/86iNZaZ0S84.m3u8/86iNZaZ0S84.m3u8"}, "slug": "multiplicity-n-1-rule", "video_id": "86iNZaZ0S84", "youtube_id": "86iNZaZ0S84", "readable_id": "multiplicity-n-1-rule"}, "IXtreNuEC-Q": {"duration": 255, "path": "khan/humanities/art-1010/early-abstraction/cubism/picasso-the-reservoir-horta-de-ebro-1909/", "keywords": "art history, Picasso, art, painting, cubism, Smarthistory, Museum of Modern Art", "id": "IXtreNuEC-Q", "title": "Picasso, The Reservoir, Horta de Ebro", "description": "Pablo Picasso, The Reservoir, Horta de Ebro, oil on canvas, summer 1909, 24-1/8 x 20-1/8\" (MoMA, fractional and promised gift)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IXtreNuEC-Q.mp4/IXtreNuEC-Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IXtreNuEC-Q.mp4/IXtreNuEC-Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IXtreNuEC-Q.m3u8/IXtreNuEC-Q.m3u8"}, "slug": "picasso-the-reservoir-horta-de-ebro-1909", "video_id": "IXtreNuEC-Q", "youtube_id": "IXtreNuEC-Q", "readable_id": "picasso-the-reservoir-horta-de-ebro-1909"}, "PsNidCBr5II": {"duration": 1133, "path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/linear-algebra-vector-triangle-inequality/", "keywords": "vector, dot, product, length", "id": "PsNidCBr5II", "title": "Vector triangle inequality", "description": "Proving the triangle inequality for vectors in Rn", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PsNidCBr5II.mp4/PsNidCBr5II.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PsNidCBr5II.mp4/PsNidCBr5II.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PsNidCBr5II.m3u8/PsNidCBr5II.m3u8"}, "slug": "linear-algebra-vector-triangle-inequality", "video_id": "PsNidCBr5II", "youtube_id": "PsNidCBr5II", "readable_id": "linear-algebra-vector-triangle-inequality"}, "2UjfxAuXuSU": {"duration": 179, "path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/charactermodeling4/", "keywords": "", "id": "2UjfxAuXuSU", "title": "4. Subdivision in 3D", "description": "Now let's think about how subdivision would work in 3D.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2UjfxAuXuSU.mp4/2UjfxAuXuSU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2UjfxAuXuSU.mp4/2UjfxAuXuSU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2UjfxAuXuSU.m3u8/2UjfxAuXuSU.m3u8"}, "slug": "charactermodeling4", "video_id": "2UjfxAuXuSU", "youtube_id": "2UjfxAuXuSU", "readable_id": "charactermodeling4"}, "RkUdm-GiSVc": {"duration": 173, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/jan-van-eyck-the-madonna-in-the-church-c-1438/", "keywords": "Van Eyck, Cathedral, GAP, Google Art Project, Gem\u00e4ldegalerie, Staatliche Museen zu Berlin, Berlin, Jan van Eyck, Madonna in the Church, 1438, oil on oak, Netherlandish, Northern Renaissance, Renaissance, Smarthistory, Khan Academy Educational, art history Documentary, Gothic", "id": "RkUdm-GiSVc", "title": "Jan van Eyck, The Madonna in the Church", "description": "Jan van Eyck, The Madonna in the Church, c. 1438, oil on oak, 31 x 14 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin). In the Google Art Project: http://www.googleartproject.com/collection/gemaldegalerie/artwork/the-madonna-in-the-church-jan-van-eyck/330338/", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RkUdm-GiSVc.mp4/RkUdm-GiSVc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RkUdm-GiSVc.mp4/RkUdm-GiSVc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RkUdm-GiSVc.m3u8/RkUdm-GiSVc.m3u8"}, "slug": "jan-van-eyck-the-madonna-in-the-church-c-1438", "video_id": "RkUdm-GiSVc", "youtube_id": "RkUdm-GiSVc", "readable_id": "jan-van-eyck-the-madonna-in-the-church-c-1438"}, "oFGkYA_diDA": {"duration": 64, "path": "khan/science/biology/her/evolution-and-natural-selection/ape-clarification/", "keywords": "ape, great, lesser, tail, primate", "id": "oFGkYA_diDA", "title": "Ape clarification", "description": "Ape Clarification - that they have no tails", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oFGkYA_diDA.mp4/oFGkYA_diDA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oFGkYA_diDA.mp4/oFGkYA_diDA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oFGkYA_diDA.m3u8/oFGkYA_diDA.m3u8"}, "slug": "ape-clarification", "video_id": "oFGkYA_diDA", "youtube_id": "oFGkYA_diDA", "readable_id": "ape-clarification"}, "cLOQJVv77w8": {"duration": 643, "path": "khan/partner-content/big-history-project/expansion-interconnection/exploration-interconnection/bhp-how-world-interconnected/", "keywords": "", "id": "cLOQJVv77w8", "title": "How Did the World Become Interconnected?", "description": "New trade networks caused an explosion in the trade of goods, but also of ideas, technologies, and diseases.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cLOQJVv77w8.mp4/cLOQJVv77w8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cLOQJVv77w8.mp4/cLOQJVv77w8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cLOQJVv77w8.m3u8/cLOQJVv77w8.m3u8"}, "slug": "bhp-how-world-interconnected", "video_id": "cLOQJVv77w8", "youtube_id": "cLOQJVv77w8", "readable_id": "bhp-how-world-interconnected"}, "bhMQYdoh8EQ": {"duration": 410, "path": "khan/science/discoveries-projects/robots/bit-zee/how-to-hotwire-a-digital-camera/", "keywords": "digital camera, hotwire, hot wire, hack a camera, hack, make, connect, control camera with an arduino", "id": "bhMQYdoh8EQ", "title": "Digital camera connections", "description": "This video shows you how to \"hotwire\" a digital camera. This video outlines the first step in making our digital camera work in the Bit-zee robot. The required voltage for the camera was determined by adding the1.5 volt AAA batteries (there are three of them) together to get 4.5 volts (because the batteries are wired in series). Since new batteries usually have a voltage that exceeds their marked rating the camera can easily run on the 5 volts that the center terminal of our L298 motor controller provides.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bhMQYdoh8EQ.mp4/bhMQYdoh8EQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bhMQYdoh8EQ.mp4/bhMQYdoh8EQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bhMQYdoh8EQ.m3u8/bhMQYdoh8EQ.m3u8"}, "slug": "how-to-hotwire-a-digital-camera", "video_id": "bhMQYdoh8EQ", "youtube_id": "bhMQYdoh8EQ", "readable_id": "how-to-hotwire-a-digital-camera"}, "3ntQz5vxFec": {"duration": 282, "path": "khan/test-prep/ap-art-history/the-pacific/buk-torres/", "keywords": "smarthistory,Oceania (Administrative Division),Pacific Islander (Ethnicity),AP Art History,Art History (Field Of Study),Torres Strait Islanders (Ethnicity),Mabuiag Island (Island),mask,african art,Torres Strait (Body Of Water)", "id": "3ntQz5vxFec", "title": "Mask (Buk), Torres Strait, Mabuiag Island", "description": "Mask (Buk), Torres Strait, Mabuiag Island, mid to late 19th century,turtle shell, wood, cassowary feathers, fiber, resin, shell, paint, 21 1/2 inches high (The Metropolitan Museum of Art) Speakers: Dr. Peri Klemm and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3ntQz5vxFec.mp4/3ntQz5vxFec.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3ntQz5vxFec.mp4/3ntQz5vxFec.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3ntQz5vxFec.m3u8/3ntQz5vxFec.m3u8"}, "slug": "buk-torres", "video_id": "3ntQz5vxFec", "youtube_id": "3ntQz5vxFec", "readable_id": "buk-torres"}, "ZxtlcZ-d90o": {"duration": 670, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/oil-prices-tutorial/short-run-oil-prices/", "keywords": "oil, gas, prices, microeconomics, macroeconomics", "id": "ZxtlcZ-d90o", "title": "Short-run oil prices", "description": "Thinking about what moves oil prices", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZxtlcZ-d90o.mp4/ZxtlcZ-d90o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZxtlcZ-d90o.mp4/ZxtlcZ-d90o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZxtlcZ-d90o.m3u8/ZxtlcZ-d90o.m3u8"}, "slug": "short-run-oil-prices", "video_id": "ZxtlcZ-d90o", "youtube_id": "ZxtlcZ-d90o", "readable_id": "short-run-oil-prices"}, "-6Fu2T_RSGM": {"duration": 476, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/standard-form/point-slope-and-standard-form/", "keywords": "U04_L1_T4_we2, Point-slope, and, standard, form, CC_8_EE_8_b, CC_8_EE_8_c, CC_8_F_3", "id": "-6Fu2T_RSGM", "title": "Writing equations in all forms", "description": "Point-slope and standard form", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-6Fu2T_RSGM.mp4/-6Fu2T_RSGM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-6Fu2T_RSGM.mp4/-6Fu2T_RSGM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-6Fu2T_RSGM.m3u8/-6Fu2T_RSGM.m3u8"}, "slug": "point-slope-and-standard-form", "video_id": "-6Fu2T_RSGM", "youtube_id": "-6Fu2T_RSGM", "readable_id": "point-slope-and-standard-form"}, "0_VaUYoNV7Y": {"duration": 367, "path": "khan/math/algebra/linear_inequalities/structure-expressions-linear/reasoning-through-inequality-expressions/", "keywords": "", "id": "0_VaUYoNV7Y", "title": "Reasoning through inequality expressions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0_VaUYoNV7Y.mp4/0_VaUYoNV7Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0_VaUYoNV7Y.mp4/0_VaUYoNV7Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0_VaUYoNV7Y.m3u8/0_VaUYoNV7Y.m3u8"}, "slug": "reasoning-through-inequality-expressions", "video_id": "0_VaUYoNV7Y", "youtube_id": "0_VaUYoNV7Y", "readable_id": "reasoning-through-inequality-expressions"}, "Q7htxHDN8LE": {"duration": 285, "path": "khan/math/trigonometry/basic-trigonometry/reciprocal-trig-functions/example-the-six-trig-ratios/", "keywords": "trigonometry sine cosine secant cosecant sec csc cotangent cot", "id": "Q7htxHDN8LE", "title": "Secant (sec), cosecant (csc) and cotangent (cot) example", "description": "Worked example where we walk through finding the major trig ratios", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q7htxHDN8LE.mp4/Q7htxHDN8LE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q7htxHDN8LE.mp4/Q7htxHDN8LE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q7htxHDN8LE.m3u8/Q7htxHDN8LE.m3u8"}, "slug": "example-the-six-trig-ratios", "video_id": "Q7htxHDN8LE", "youtube_id": "Q7htxHDN8LE", "readable_id": "example-the-six-trig-ratios"}, "u5NCRHcel_g": {"duration": 281, "path": "khan/science/discoveries-projects/robots/all-about-spout/sliding-spdt-switch/", "keywords": "", "id": "u5NCRHcel_g", "title": "Spout's sliding SPDT switch", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u5NCRHcel_g.mp4/u5NCRHcel_g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u5NCRHcel_g.mp4/u5NCRHcel_g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u5NCRHcel_g.m3u8/u5NCRHcel_g.m3u8"}, "slug": "sliding-spdt-switch", "video_id": "u5NCRHcel_g", "youtube_id": "u5NCRHcel_g", "readable_id": "sliding-spdt-switch"}, "8Eb5MWwcMMY": {"duration": 141, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-number-add-sub-pre-alg/adding-subtracting-mixed-numbers-1-ex-1/", "keywords": "Adding, subtracting, mixed, numbers, 1, ex", "id": "8Eb5MWwcMMY", "title": "Adding mixed numbers that have unlike denominators", "description": "You know mixed numbers, right? A number that is both a whole number and a proper fraction? Let's add a few together. If this is new to you, no worries. We'll explain everything.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8Eb5MWwcMMY.mp4/8Eb5MWwcMMY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8Eb5MWwcMMY.mp4/8Eb5MWwcMMY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8Eb5MWwcMMY.m3u8/8Eb5MWwcMMY.m3u8"}, "slug": "adding-subtracting-mixed-numbers-1-ex-1", "video_id": "8Eb5MWwcMMY", "youtube_id": "8Eb5MWwcMMY", "readable_id": "adding-subtracting-mixed-numbers-1-ex-1"}, "jroamh6SIo0": {"duration": 150, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/example-adding-polynomials-with-multiple-variables/", "keywords": "polynomial simplifying", "id": "jroamh6SIo0", "title": "How to add polynomials with two variables (example)", "description": "Sal simplifies (4x^2y - 3x^2 - 2y) + (8xy - 3x^2 + 2x^2y + 4).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jroamh6SIo0.mp4/jroamh6SIo0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jroamh6SIo0.mp4/jroamh6SIo0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jroamh6SIo0.m3u8/jroamh6SIo0.m3u8"}, "slug": "example-adding-polynomials-with-multiple-variables", "video_id": "jroamh6SIo0", "youtube_id": "jroamh6SIo0", "readable_id": "example-adding-polynomials-with-multiple-variables"}, "XOIhNVeLfWs": {"duration": 309, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/standard-form/converting-from-slope-intercept-to-standard-form/", "keywords": "", "id": "XOIhNVeLfWs", "title": "Converting from slope-intercept to standard form", "description": "Converting from slope-intercept to standard form", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XOIhNVeLfWs.mp4/XOIhNVeLfWs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XOIhNVeLfWs.mp4/XOIhNVeLfWs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XOIhNVeLfWs.m3u8/XOIhNVeLfWs.m3u8"}, "slug": "converting-from-slope-intercept-to-standard-form", "video_id": "XOIhNVeLfWs", "youtube_id": "XOIhNVeLfWs", "readable_id": "converting-from-slope-intercept-to-standard-form"}, "b_dDoAbqp1M": {"duration": 110, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p4-easier/", "keywords": "", "id": "b_dDoAbqp1M", "title": "Structure in expressions \u2014 Basic example", "description": "Watch Sal work through a basic Structure in expressions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b_dDoAbqp1M.mp4/b_dDoAbqp1M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b_dDoAbqp1M.mp4/b_dDoAbqp1M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b_dDoAbqp1M.m3u8/b_dDoAbqp1M.m3u8"}, "slug": "sat-math-p4-easier", "video_id": "b_dDoAbqp1M", "youtube_id": "b_dDoAbqp1M", "readable_id": "sat-math-p4-easier"}, "b8q6i_XPyhk": {"duration": 229, "path": "khan/math/geometry/basic-geometry/area_non_standard/area-of-a-kite/", "keywords": "", "id": "b8q6i_XPyhk", "title": "Area of a kite", "description": "Learn how to find the area of a kite. A kite is a type of quadrilateral that is symmetric around one of its diagonals.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b8q6i_XPyhk.mp4/b8q6i_XPyhk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b8q6i_XPyhk.mp4/b8q6i_XPyhk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b8q6i_XPyhk.m3u8/b8q6i_XPyhk.m3u8"}, "slug": "area-of-a-kite", "video_id": "b8q6i_XPyhk", "youtube_id": "b8q6i_XPyhk", "readable_id": "area-of-a-kite"}, "4eNX_xFt-sU": {"duration": 477, "path": "khan/humanities/art-history-basics/tools-understanding-art/the-body-in-western-sculpture/", "keywords": "", "id": "4eNX_xFt-sU", "title": "A brief history of representing of the body in Western sculpture", "description": "Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4eNX_xFt-sU.mp4/4eNX_xFt-sU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4eNX_xFt-sU.mp4/4eNX_xFt-sU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4eNX_xFt-sU.m3u8/4eNX_xFt-sU.m3u8"}, "slug": "the-body-in-western-sculpture", "video_id": "4eNX_xFt-sU", "youtube_id": "4eNX_xFt-sU", "readable_id": "the-body-in-western-sculpture"}, "EQJf8Gb8pg4": {"duration": 478, "path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/redox-titration/", "keywords": "", "id": "EQJf8Gb8pg4", "title": "Redox titration", "description": "A redox titration example: titrating an Fe(II) solution with potassium permanganate.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EQJf8Gb8pg4.mp4/EQJf8Gb8pg4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EQJf8Gb8pg4.mp4/EQJf8Gb8pg4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EQJf8Gb8pg4.m3u8/EQJf8Gb8pg4.m3u8"}, "slug": "redox-titration", "video_id": "EQJf8Gb8pg4", "youtube_id": "EQJf8Gb8pg4", "readable_id": "redox-titration"}, "4vuybxJvRuA": {"duration": 551, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/dvorak-one/", "keywords": "", "id": "4vuybxJvRuA", "title": "Anton\u00edn Dvo\u0159\u00e1k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 1)", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4vuybxJvRuA.mp4/4vuybxJvRuA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4vuybxJvRuA.mp4/4vuybxJvRuA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4vuybxJvRuA.m3u8/4vuybxJvRuA.m3u8"}, "slug": "dvorak-one", "video_id": "4vuybxJvRuA", "youtube_id": "4vuybxJvRuA", "readable_id": "dvorak-one"}, "YdBXHm3edL8": {"duration": 556, "path": "khan/science/biology/human-biology/immunology/cytotoxic-t-cell-mhc-i-complexes/", "keywords": "", "id": "YdBXHm3edL8", "title": "Cytotoxic T cells and MHC I complexes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YdBXHm3edL8.mp4/YdBXHm3edL8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YdBXHm3edL8.mp4/YdBXHm3edL8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YdBXHm3edL8.m3u8/YdBXHm3edL8.m3u8"}, "slug": "cytotoxic-t-cell-mhc-i-complexes", "video_id": "YdBXHm3edL8", "youtube_id": "YdBXHm3edL8", "readable_id": "cytotoxic-t-cell-mhc-i-complexes"}, "lxjmR4pYIVU": {"duration": 282, "path": "khan/math/pre-algebra/fractions-pre-alg/equivalent-fractions-pre-alg/finding-common-denominators/", "keywords": "U02_l3_t1_we7, Finding, Common, Denominators", "id": "lxjmR4pYIVU", "title": "Finding common denominators", "description": "Rewrite 2/8 and 5/6 to have the same denominator.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lxjmR4pYIVU.mp4/lxjmR4pYIVU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lxjmR4pYIVU.mp4/lxjmR4pYIVU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lxjmR4pYIVU.m3u8/lxjmR4pYIVU.m3u8"}, "slug": "finding-common-denominators", "video_id": "lxjmR4pYIVU", "youtube_id": "lxjmR4pYIVU", "readable_id": "finding-common-denominators"}, "pLCmwHsDYqo": {"duration": 383, "path": "khan/math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders/dividing-polynomials-with-remainders/", "keywords": "u11_l2_t6_we2, Dividing, polynomials, with, remainders, CC_6_EE_1, CC_6_EE_2_c, CC_39336_A-APR_1", "id": "pLCmwHsDYqo", "title": "How to find the quotient and remainder of polynomial divided by polynomial (example)", "description": "Sal divides (x^3+5x-4) by (x^2-x+1) using long division.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pLCmwHsDYqo.mp4/pLCmwHsDYqo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pLCmwHsDYqo.mp4/pLCmwHsDYqo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pLCmwHsDYqo.m3u8/pLCmwHsDYqo.m3u8"}, "slug": "dividing-polynomials-with-remainders", "video_id": "pLCmwHsDYqo", "youtube_id": "pLCmwHsDYqo", "readable_id": "dividing-polynomials-with-remainders"}, "1Ex5II-jZzw": {"duration": 172, "path": "khan/partner-content/big-history-project/big-bang/the-big-bang/bhp-questions-about-big-bang/", "keywords": "", "id": "1Ex5II-jZzw", "title": "Questions About the Big Bang", "description": "Janna Levin discusses what we know about the Big Bang, and ponders the profound questions that remain.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1Ex5II-jZzw.mp4/1Ex5II-jZzw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1Ex5II-jZzw.mp4/1Ex5II-jZzw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1Ex5II-jZzw.m3u8/1Ex5II-jZzw.m3u8"}, "slug": "bhp-questions-about-big-bang", "video_id": "1Ex5II-jZzw", "youtube_id": "1Ex5II-jZzw", "readable_id": "bhp-questions-about-big-bang"}, "RQ0855yB2ZM": {"duration": 332, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/cole-oxbow/", "keywords": "", "id": "RQ0855yB2ZM", "title": "Thomas Cole, The Oxbow", "description": "Thomas Cole, View from Mount Holyoke, Northampton, Massachusetts, after a Thunderstorm\u2014The Oxbow, 1836, oil on canvas, 51 1/2 x 76 inches / 130.8 x 193 cm (The Metropolitan Museum of Art) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RQ0855yB2ZM.mp4/RQ0855yB2ZM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RQ0855yB2ZM.mp4/RQ0855yB2ZM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RQ0855yB2ZM.m3u8/RQ0855yB2ZM.m3u8"}, "slug": "cole-oxbow", "video_id": "RQ0855yB2ZM", "youtube_id": "RQ0855yB2ZM", "readable_id": "cole-oxbow"}, "XVOU9c3crbc": {"duration": 537, "path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/bronsted-lowry-definition-of-acids-and-bases/", "keywords": "education,online learning,learning,lessons,bronsted-lowry,acid,base,conjugate,hcl,Hydrochloric Acid (Chemical Compound)", "id": "XVOU9c3crbc", "title": "Bronsted-Lowry definition of acids and bases", "description": "Bronsted-Lowry definition of acids and bases. Conjugate acids and bases.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XVOU9c3crbc.mp4/XVOU9c3crbc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XVOU9c3crbc.mp4/XVOU9c3crbc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XVOU9c3crbc.m3u8/XVOU9c3crbc.m3u8"}, "slug": "bronsted-lowry-definition-of-acids-and-bases", "video_id": "XVOU9c3crbc", "youtube_id": "XVOU9c3crbc", "readable_id": "bronsted-lowry-definition-of-acids-and-bases"}, "KrXE_SzRoqw": {"duration": 720, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/quantum-numbers/", "keywords": "", "id": "KrXE_SzRoqw", "title": "Quantum numbers", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KrXE_SzRoqw.mp4/KrXE_SzRoqw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KrXE_SzRoqw.mp4/KrXE_SzRoqw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KrXE_SzRoqw.m3u8/KrXE_SzRoqw.m3u8"}, "slug": "quantum-numbers", "video_id": "KrXE_SzRoqw", "youtube_id": "KrXE_SzRoqw", "readable_id": "quantum-numbers"}, "Fvi9A_tEmXQ": {"duration": 602, "path": "khan/math/probability/random-variables-topic/random_variables_prob_dist/probability-density-functions/", "keywords": "random, variable, continuous, probability, density, function, CC_7_SP_7_b", "id": "Fvi9A_tEmXQ", "title": "Probability density functions", "description": "Probability density functions for continuous random variables.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Fvi9A_tEmXQ.mp4/Fvi9A_tEmXQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Fvi9A_tEmXQ.mp4/Fvi9A_tEmXQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Fvi9A_tEmXQ.m3u8/Fvi9A_tEmXQ.m3u8"}, "slug": "probability-density-functions", "video_id": "Fvi9A_tEmXQ", "youtube_id": "Fvi9A_tEmXQ", "readable_id": "probability-density-functions"}, "mmljtQHP0dw": {"duration": 124, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/ocean-acidification/ocean-acidification-tips/", "keywords": "climate change,Ocean Acidification,Chemistry,Science,Experiment,Lesson,NGSS,Diffusion", "id": "mmljtQHP0dw", "title": "Experiment tips", "description": "Here are a few tips from Lori to help you conduct your Ocean Acidification in a Cup experiment.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mmljtQHP0dw.mp4/mmljtQHP0dw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mmljtQHP0dw.mp4/mmljtQHP0dw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mmljtQHP0dw.m3u8/mmljtQHP0dw.m3u8"}, "slug": "ocean-acidification-tips", "video_id": "mmljtQHP0dw", "youtube_id": "mmljtQHP0dw", "readable_id": "ocean-acidification-tips"}, "D1NubiWCpQg": {"duration": 434, "path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/newton-s-first-law-of-motion-concepts/", "keywords": "physics, newton's, laws", "id": "D1NubiWCpQg", "title": "Newton's first law of motion concepts", "description": "A little quiz on some of the ideas in Newton's first law", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D1NubiWCpQg.mp4/D1NubiWCpQg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D1NubiWCpQg.mp4/D1NubiWCpQg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D1NubiWCpQg.m3u8/D1NubiWCpQg.m3u8"}, "slug": "newton-s-first-law-of-motion-concepts", "video_id": "D1NubiWCpQg", "youtube_id": "D1NubiWCpQg", "readable_id": "newton-s-first-law-of-motion-concepts"}, "PF7m1fFr2eQ": {"duration": 284, "path": "khan/test-prep/mcat/behavior/social-psychology/agents-of-socialization/", "keywords": "", "id": "PF7m1fFr2eQ", "title": "Agents of socialization", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PF7m1fFr2eQ.mp4/PF7m1fFr2eQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PF7m1fFr2eQ.mp4/PF7m1fFr2eQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PF7m1fFr2eQ.m3u8/PF7m1fFr2eQ.m3u8"}, "slug": "agents-of-socialization", "video_id": "PF7m1fFr2eQ", "youtube_id": "PF7m1fFr2eQ", "readable_id": "agents-of-socialization"}, "utdhIMzR6XM": {"duration": 258, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-4-14/", "keywords": "", "id": "utdhIMzR6XM", "title": "14 Bread combinations", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/utdhIMzR6XM.mp4/utdhIMzR6XM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/utdhIMzR6XM.mp4/utdhIMzR6XM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/utdhIMzR6XM.m3u8/utdhIMzR6XM.m3u8"}, "slug": "sat-2010-may-4-14", "video_id": "utdhIMzR6XM", "youtube_id": "utdhIMzR6XM", "readable_id": "sat-2010-may-4-14"}, "wV59XWLmv0c": {"duration": 413, "path": "khan/math/differential-calculus/derivative_applications/rates_of_change/rate-of-change-of-distance-between-approaching-cars/", "keywords": "", "id": "wV59XWLmv0c", "title": "Rate of change of distance between approaching cars", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wV59XWLmv0c.mp4/wV59XWLmv0c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wV59XWLmv0c.mp4/wV59XWLmv0c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wV59XWLmv0c.m3u8/wV59XWLmv0c.m3u8"}, "slug": "rate-of-change-of-distance-between-approaching-cars", "video_id": "wV59XWLmv0c", "youtube_id": "wV59XWLmv0c", "readable_id": "rate-of-change-of-distance-between-approaching-cars"}, "DMDcn2j-8ig": {"duration": 774, "path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/period-trend-for-ionization-energy/", "keywords": "", "id": "DMDcn2j-8ig", "title": "Period trend for ionization energy", "description": "Explaining trends in ionization energy across a period using nuclear charge, shielding, and distance of electrons from nucleus", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DMDcn2j-8ig.mp4/DMDcn2j-8ig.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DMDcn2j-8ig.mp4/DMDcn2j-8ig.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DMDcn2j-8ig.m3u8/DMDcn2j-8ig.m3u8"}, "slug": "period-trend-for-ionization-energy", "video_id": "DMDcn2j-8ig", "youtube_id": "DMDcn2j-8ig", "readable_id": "period-trend-for-ionization-energy"}, "rL0lDESwwv8": {"duration": 626, "path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/acid-and-base-catalyzed-formation-of-hydrates-and-hemiacetals/", "keywords": "", "id": "rL0lDESwwv8", "title": "Acid and base catalyzed formation of hydrates and hemiacetals", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rL0lDESwwv8.mp4/rL0lDESwwv8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rL0lDESwwv8.mp4/rL0lDESwwv8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rL0lDESwwv8.m3u8/rL0lDESwwv8.m3u8"}, "slug": "acid-and-base-catalyzed-formation-of-hydrates-and-hemiacetals", "video_id": "rL0lDESwwv8", "youtube_id": "rL0lDESwwv8", "readable_id": "acid-and-base-catalyzed-formation-of-hydrates-and-hemiacetals"}, "FOkQszg1-j8": {"duration": 546, "path": "khan/test-prep/mcat/physical-processes/acceleration-mcat/acceleration/", "keywords": "physics, kinematics", "id": "FOkQszg1-j8", "title": "Acceleration", "description": "Calculating the acceleration of a Porsche", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FOkQszg1-j8.mp4/FOkQszg1-j8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FOkQszg1-j8.mp4/FOkQszg1-j8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FOkQszg1-j8.m3u8/FOkQszg1-j8.m3u8"}, "slug": "acceleration", "video_id": "FOkQszg1-j8", "youtube_id": "FOkQszg1-j8", "readable_id": "acceleration"}, "7hCsQOKOYS8": {"duration": 339, "path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-with-definite-integral/", "keywords": "", "id": "7hCsQOKOYS8", "title": "u-substitution with definite integral", "description": "Example of using u-substitution to evaluate a definite integral", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7hCsQOKOYS8.mp4/7hCsQOKOYS8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7hCsQOKOYS8.mp4/7hCsQOKOYS8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7hCsQOKOYS8.m3u8/7hCsQOKOYS8.m3u8"}, "slug": "u-substitution-with-definite-integral", "video_id": "7hCsQOKOYS8", "youtube_id": "7hCsQOKOYS8", "readable_id": "u-substitution-with-definite-integral"}, "i9j_VUMq5yg": {"duration": 130, "path": "khan/math/algebra/introduction-to-algebra/feel-for-equations-and-inequalit/dependent-and-independent-variables-exercise-example-1/", "keywords": "", "id": "i9j_VUMq5yg", "title": "Dependent and independent variables exercise: the basics", "description": "Here we have a problem that asks us to identify which variables are dependent and independent. Hint: independent variables are not influenced and remain unchanged by the other variable.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i9j_VUMq5yg.mp4/i9j_VUMq5yg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i9j_VUMq5yg.mp4/i9j_VUMq5yg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i9j_VUMq5yg.m3u8/i9j_VUMq5yg.m3u8"}, "slug": "dependent-and-independent-variables-exercise-example-1", "video_id": "i9j_VUMq5yg", "youtube_id": "i9j_VUMq5yg", "readable_id": "dependent-and-independent-variables-exercise-example-1"}, "I9eLKDbc8og": {"duration": 204, "path": "khan/math/algebra/introduction-to-algebra/variable-and-expressions/evaluating-expressions-3-exercise/", "keywords": "", "id": "I9eLKDbc8og", "title": "Evaluating an algebraic expression in a word problem", "description": "In this example of evaluating expressions, we're dusting off some geometry. On top of that, it's a word problem. We're seeing how different concepts in math are layered on top of each to create more interesting and complex problems to solve.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I9eLKDbc8og.mp4/I9eLKDbc8og.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I9eLKDbc8og.mp4/I9eLKDbc8og.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I9eLKDbc8og.m3u8/I9eLKDbc8og.m3u8"}, "slug": "evaluating-expressions-3-exercise", "video_id": "I9eLKDbc8og", "youtube_id": "I9eLKDbc8og", "readable_id": "evaluating-expressions-3-exercise"}, "b5kDRza-Xqs": {"duration": 301, "path": "khan/partner-content/wi-phi/metaphys-epistemology/personal-identity/", "keywords": "", "id": "b5kDRza-Xqs", "title": "Mind: Personal Identity", "description": "Using the method of experimental philosophy, Nina Strohminger (Yale University) and Shaun Nichols (University of Arizona) compare philosophical and everyday answers to the question \"Which aspect of the self is most essential for personal identity?\"\n\nSpeakers: Dr. Nina Strohminger, Yale University and Shaun Nichols, University of Arizona", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b5kDRza-Xqs.mp4/b5kDRza-Xqs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b5kDRza-Xqs.mp4/b5kDRza-Xqs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b5kDRza-Xqs.m3u8/b5kDRza-Xqs.m3u8"}, "slug": "personal-identity", "video_id": "b5kDRza-Xqs", "youtube_id": "b5kDRza-Xqs", "readable_id": "personal-identity"}, "iCYSKCJNbwM": {"duration": 160, "path": "khan/humanities/art-1010/wwi-dada/art-great-war/room-1914-1915/", "keywords": "Tate", "id": "iCYSKCJNbwM", "title": "Room: 1914 & 1915", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Chris Stephens explores the years 1914 & 1915.\n\nLearn more about the art featured in this video:\n-\u00a0Sir Jacob Epstein, Torso in Metal from \u2018The Rock Drill\u2019, 1913\u201314\n- David Bomberg, The Mud Bath, 1914\n-\u00a0Walter Richard Sickert, Brighton Pierrots, 1915", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iCYSKCJNbwM.mp4/iCYSKCJNbwM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iCYSKCJNbwM.mp4/iCYSKCJNbwM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iCYSKCJNbwM.m3u8/iCYSKCJNbwM.m3u8"}, "slug": "room-1914-1915", "video_id": "iCYSKCJNbwM", "youtube_id": "iCYSKCJNbwM", "readable_id": "room-1914-1915"}, "8OHEgD6YMBw": {"duration": 208, "path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/linear-exponential-models/", "keywords": "", "id": "8OHEgD6YMBw", "title": "How to distinguish between linear and exponential models (examples)", "description": "Sal sorts various descriptions of real-world situation according to the type of growth they describe: linear or exponential.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8OHEgD6YMBw.mp4/8OHEgD6YMBw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8OHEgD6YMBw.mp4/8OHEgD6YMBw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8OHEgD6YMBw.m3u8/8OHEgD6YMBw.m3u8"}, "slug": "linear-exponential-models", "video_id": "8OHEgD6YMBw", "youtube_id": "8OHEgD6YMBw", "readable_id": "linear-exponential-models"}, "ZSLMm5KNGEc": {"duration": 398, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/postpartum-hemorrhage/", "keywords": "", "id": "ZSLMm5KNGEc", "title": "Postpartum hemorrhage", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZSLMm5KNGEc.mp4/ZSLMm5KNGEc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZSLMm5KNGEc.mp4/ZSLMm5KNGEc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZSLMm5KNGEc.m3u8/ZSLMm5KNGEc.m3u8"}, "slug": "postpartum-hemorrhage", "video_id": "ZSLMm5KNGEc", "youtube_id": "ZSLMm5KNGEc", "readable_id": "postpartum-hemorrhage"}, "jYOfMszfzAQ": {"duration": 368, "path": "khan/math/algebra-basics/core-algebra-foundations/world-of-exponents-college-readiness/powers-of-1-and-1/", "keywords": "", "id": "jYOfMszfzAQ", "title": "Patterns in raising 1 and -1 to different powers", "description": "Use odd and even rules to determine the sign of an exponential expression.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jYOfMszfzAQ.mp4/jYOfMszfzAQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jYOfMszfzAQ.mp4/jYOfMszfzAQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jYOfMszfzAQ.m3u8/jYOfMszfzAQ.m3u8"}, "slug": "powers-of-1-and-1", "video_id": "jYOfMszfzAQ", "youtube_id": "jYOfMszfzAQ", "readable_id": "powers-of-1-and-1"}, "gcJeg4SdIpU": {"duration": 599, "path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/polynomial-approximation-of-functions-part-4/", "keywords": "power, maclaurin, taylor, series, derivative, infinite, sum", "id": "gcJeg4SdIpU", "title": "Polynomial approximation of functions (part 4)", "description": "Approximating cos x with a Maclaurin series.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gcJeg4SdIpU.mp4/gcJeg4SdIpU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gcJeg4SdIpU.mp4/gcJeg4SdIpU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gcJeg4SdIpU.m3u8/gcJeg4SdIpU.m3u8"}, "slug": "polynomial-approximation-of-functions-part-4", "video_id": "gcJeg4SdIpU", "youtube_id": "gcJeg4SdIpU", "readable_id": "polynomial-approximation-of-functions-part-4"}, "G9DDOq7MtLk": {"duration": 32, "path": "khan/partner-content/exploratorium/expl-sound/light-to-sound/light-to-sound-introduction/", "keywords": "", "id": "G9DDOq7MtLk", "title": "Light into sound introduction", "description": "Turn sound into light and then back again with a few simple materials.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/G9DDOq7MtLk.mp4/G9DDOq7MtLk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/G9DDOq7MtLk.mp4/G9DDOq7MtLk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/G9DDOq7MtLk.m3u8/G9DDOq7MtLk.m3u8"}, "slug": "light-to-sound-introduction", "video_id": "G9DDOq7MtLk", "youtube_id": "G9DDOq7MtLk", "readable_id": "light-to-sound-introduction"}, "GacKM9yxiw4": {"duration": 230, "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-painting-technique-newman/", "keywords": "", "id": "GacKM9yxiw4", "title": "The Painting Techniques of Barnett Newman", "description": "Learn Barnett Newman's techniques and how he reinvented the traditional figure-ground relationship. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GacKM9yxiw4.mp4/GacKM9yxiw4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GacKM9yxiw4.mp4/GacKM9yxiw4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GacKM9yxiw4.m3u8/GacKM9yxiw4.m3u8"}, "slug": "moma-painting-technique-newman", "video_id": "GacKM9yxiw4", "youtube_id": "GacKM9yxiw4", "readable_id": "moma-painting-technique-newman"}, "UlJmX9SLGRw": {"duration": 611, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-properties-ethers/properties-of-ethers-and-crown-ethers/", "keywords": "", "id": "UlJmX9SLGRw", "title": "Properties of ethers and crown ethers", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UlJmX9SLGRw.mp4/UlJmX9SLGRw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UlJmX9SLGRw.mp4/UlJmX9SLGRw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UlJmX9SLGRw.m3u8/UlJmX9SLGRw.m3u8"}, "slug": "properties-of-ethers-and-crown-ethers", "video_id": "UlJmX9SLGRw", "youtube_id": "UlJmX9SLGRw", "readable_id": "properties-of-ethers-and-crown-ethers"}, "rVI5Sjm0xKI": {"duration": 201, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/fragonard-the-swing-1767/", "keywords": "Fragonard, Swing, art history, history of art, rococo, smarthistory", "id": "rVI5Sjm0xKI", "title": "Fragonard, The Swing", "description": "Jean-Honor\u00e9 Fragonard, The Swing, oil on canvas, 1767 (Wallace Collection, London) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rVI5Sjm0xKI.mp4/rVI5Sjm0xKI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rVI5Sjm0xKI.mp4/rVI5Sjm0xKI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rVI5Sjm0xKI.m3u8/rVI5Sjm0xKI.m3u8"}, "slug": "fragonard-the-swing-1767", "video_id": "rVI5Sjm0xKI", "youtube_id": "rVI5Sjm0xKI", "readable_id": "fragonard-the-swing-1767"}, "fAUUHCZMJH8": {"duration": 212, "path": "khan/test-prep/mcat/social-inequality/social-class/intergenerational-and-intragenerational-mobility-social-mobility/", "keywords": "", "id": "fAUUHCZMJH8", "title": "Intergenerational and intragenerational mobility social mobility", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fAUUHCZMJH8.mp4/fAUUHCZMJH8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fAUUHCZMJH8.mp4/fAUUHCZMJH8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fAUUHCZMJH8.m3u8/fAUUHCZMJH8.m3u8"}, "slug": "intergenerational-and-intragenerational-mobility-social-mobility", "video_id": "fAUUHCZMJH8", "youtube_id": "fAUUHCZMJH8", "readable_id": "intergenerational-and-intragenerational-mobility-social-mobility"}, "dbdVMThH1n8": {"duration": 1032, "path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/formation-carboxylic-acid-derivatives-sal/fisher-esterification/", "keywords": "Fisher, Esterification, of, Carboxylic, Acid, Ester", "id": "dbdVMThH1n8", "title": "Fischer esterification", "description": "Fischer Esterification of Carboxylic Acids", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dbdVMThH1n8.mp4/dbdVMThH1n8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dbdVMThH1n8.mp4/dbdVMThH1n8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dbdVMThH1n8.m3u8/dbdVMThH1n8.m3u8"}, "slug": "fisher-esterification", "video_id": "dbdVMThH1n8", "youtube_id": "dbdVMThH1n8", "readable_id": "fisher-esterification"}, "W3_A_A0XBiY": {"duration": 95, "path": "khan/test-prep/mcat/society-and-culture/culture/diffusion/", "keywords": "", "id": "W3_A_A0XBiY", "title": "Diffusion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W3_A_A0XBiY.mp4/W3_A_A0XBiY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W3_A_A0XBiY.mp4/W3_A_A0XBiY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W3_A_A0XBiY.m3u8/W3_A_A0XBiY.m3u8"}, "slug": "diffusion", "video_id": "W3_A_A0XBiY", "youtube_id": "W3_A_A0XBiY", "readable_id": "diffusion"}, "OzLoUCCASwM": {"duration": 358, "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/stomach/", "keywords": "MCAT", "id": "OzLoUCCASwM", "title": "Stomach", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OzLoUCCASwM.mp4/OzLoUCCASwM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OzLoUCCASwM.mp4/OzLoUCCASwM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OzLoUCCASwM.m3u8/OzLoUCCASwM.m3u8"}, "slug": "stomach", "video_id": "OzLoUCCASwM", "youtube_id": "OzLoUCCASwM", "readable_id": "stomach"}, "K9RPyi0klYo": {"duration": 180, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/warby-parker/warby-parker-1/", "keywords": "", "id": "K9RPyi0klYo", "title": "A fix for a broken industry", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K9RPyi0klYo.mp4/K9RPyi0klYo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K9RPyi0klYo.mp4/K9RPyi0klYo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K9RPyi0klYo.m3u8/K9RPyi0klYo.m3u8"}, "slug": "warby-parker-1", "video_id": "K9RPyi0klYo", "youtube_id": "K9RPyi0klYo", "readable_id": "warby-parker-1"}, "qLMsZKx_a8s": {"duration": 362, "path": "khan/science/discoveries-projects/reverse-engin/reverse-engineering/what-is-inside-a-tap-light/", "keywords": "Tap light, led", "id": "qLMsZKx_a8s", "title": "What is inside a tap light?", "description": "In this video we go inside a tap light to discover what is inside and how it works.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qLMsZKx_a8s.mp4/qLMsZKx_a8s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qLMsZKx_a8s.mp4/qLMsZKx_a8s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qLMsZKx_a8s.m3u8/qLMsZKx_a8s.m3u8"}, "slug": "what-is-inside-a-tap-light", "video_id": "qLMsZKx_a8s", "youtube_id": "qLMsZKx_a8s", "readable_id": "what-is-inside-a-tap-light"}, "d3109sV6izY": {"duration": 160, "path": "khan/math/early-math/cc-early-math-add-sub-1000/cc-early-math-add-ones-tens-hundreds/adding-three-digit-numbers-without-regrouping/", "keywords": "education,online learning,learning,lessons", "id": "d3109sV6izY", "title": "Adding three-digit numbers without regrouping", "description": "Sal shows how to add 327 + 251.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d3109sV6izY.mp4/d3109sV6izY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d3109sV6izY.mp4/d3109sV6izY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d3109sV6izY.m3u8/d3109sV6izY.m3u8"}, "slug": "adding-three-digit-numbers-without-regrouping", "video_id": "d3109sV6izY", "youtube_id": "d3109sV6izY", "readable_id": "adding-three-digit-numbers-without-regrouping"}, "5a6zpfl50go": {"duration": 510, "path": "khan/math/algebra-basics/core-algebra-systems/core-algebra-systems-tutorial/solving-linear-systems-by-graphing/", "keywords": "Solving, Linear, Systems, by, Graphing, CC_8_EE_8_a, CC_39336_A-REI_11, CC_39336_A-REI_6", "id": "5a6zpfl50go", "title": "Solving linear systems by graphing", "description": "Solving Linear Systems by Graphing", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5a6zpfl50go.mp4/5a6zpfl50go.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5a6zpfl50go.mp4/5a6zpfl50go.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5a6zpfl50go.m3u8/5a6zpfl50go.m3u8"}, "slug": "solving-linear-systems-by-graphing", "video_id": "5a6zpfl50go", "youtube_id": "5a6zpfl50go", "readable_id": "solving-linear-systems-by-graphing"}, "Kwk62Xw6YHU": {"duration": 83, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-12-roller-coaster/", "keywords": "", "id": "Kwk62Xw6YHU", "title": "12 Roller coaster", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Kwk62Xw6YHU.mp4/Kwk62Xw6YHU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Kwk62Xw6YHU.mp4/Kwk62Xw6YHU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Kwk62Xw6YHU.m3u8/Kwk62Xw6YHU.m3u8"}, "slug": "sat-12-roller-coaster", "video_id": "Kwk62Xw6YHU", "youtube_id": "Kwk62Xw6YHU", "readable_id": "sat-12-roller-coaster"}, "EiZJzWPTm0I": {"duration": 512, "path": "khan/test-prep/gmat/problem-solving/gmat-math-54/", "keywords": "GMAT, Math, problem, solving", "id": "EiZJzWPTm0I", "title": "GMAT: Math 54", "description": "248-249, pg. 186", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EiZJzWPTm0I.mp4/EiZJzWPTm0I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EiZJzWPTm0I.mp4/EiZJzWPTm0I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EiZJzWPTm0I.m3u8/EiZJzWPTm0I.m3u8"}, "slug": "gmat-math-54", "video_id": "EiZJzWPTm0I", "youtube_id": "EiZJzWPTm0I", "readable_id": "gmat-math-54"}, "e4qci9b2d3U": {"duration": 496, "path": "khan/test-prep/mcat/chemical-processes/kinetics/half-life-of-a-first-order-reaction/", "keywords": "", "id": "e4qci9b2d3U", "title": "Half-life of a first-order reaction", "description": "Deriving half-life equation of a first-order reaction starting from the integrated rate law.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e4qci9b2d3U.mp4/e4qci9b2d3U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e4qci9b2d3U.mp4/e4qci9b2d3U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e4qci9b2d3U.m3u8/e4qci9b2d3U.m3u8"}, "slug": "half-life-of-a-first-order-reaction", "video_id": "e4qci9b2d3U", "youtube_id": "e4qci9b2d3U", "readable_id": "half-life-of-a-first-order-reaction"}, "oqI4skjr6lQ": {"duration": 606, "path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/cytotoxic-t-cells/", "keywords": "cytotoxic, cell, effor, memory", "id": "oqI4skjr6lQ", "title": "Cytotoxic T cells", "description": "How cytotoxic T cells get activated by MHC-I/antigen complexes and then proceed to kill infected cells", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oqI4skjr6lQ.mp4/oqI4skjr6lQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oqI4skjr6lQ.mp4/oqI4skjr6lQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oqI4skjr6lQ.m3u8/oqI4skjr6lQ.m3u8"}, "slug": "cytotoxic-t-cells", "video_id": "oqI4skjr6lQ", "youtube_id": "oqI4skjr6lQ", "readable_id": "cytotoxic-t-cells"}, "tUdc4bD2OZU": {"duration": 81, "path": "khan/college-admissions/get-started/importance-of-college/ss-college-increases-confidence/", "keywords": "", "id": "tUdc4bD2OZU", "title": "Student story: College increases confidence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tUdc4bD2OZU.mp4/tUdc4bD2OZU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tUdc4bD2OZU.mp4/tUdc4bD2OZU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tUdc4bD2OZU.m3u8/tUdc4bD2OZU.m3u8"}, "slug": "ss-college-increases-confidence", "video_id": "tUdc4bD2OZU", "youtube_id": "tUdc4bD2OZU", "readable_id": "ss-college-increases-confidence"}, "S5LEdJfCsHM": {"duration": 569, "path": "khan/math/recreational-math/puzzles/brain-teasers/cheryls-birthday/", "keywords": "", "id": "S5LEdJfCsHM", "title": "Cheryl's birthday", "description": "Deductive reasoning problem from Singapore.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S5LEdJfCsHM.mp4/S5LEdJfCsHM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S5LEdJfCsHM.mp4/S5LEdJfCsHM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S5LEdJfCsHM.m3u8/S5LEdJfCsHM.m3u8"}, "slug": "cheryls-birthday", "video_id": "S5LEdJfCsHM", "youtube_id": "S5LEdJfCsHM", "readable_id": "cheryls-birthday"}, "GLgrt_4WnMY": {"duration": 217, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-etruria/apollo-of-veil/", "keywords": "", "id": "GLgrt_4WnMY", "title": "Apulu (Apollo of Veil)", "description": "Apulu (Apollo of Veil), from the roof of the Portonaccio temple, Italy, c. 510-500 B.C.E., painted terracotta, 5 feet, 11 inches high (Museo Nazionale di Villa Giulia, Rome). \u00a0Speakers: Dr Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GLgrt_4WnMY.mp4/GLgrt_4WnMY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GLgrt_4WnMY.mp4/GLgrt_4WnMY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GLgrt_4WnMY.m3u8/GLgrt_4WnMY.m3u8"}, "slug": "apollo-of-veil", "video_id": "GLgrt_4WnMY", "youtube_id": "GLgrt_4WnMY", "readable_id": "apollo-of-veil"}, "xWvhFIh8AaI": {"duration": 617, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/maurice-ravel-daphnis/", "keywords": "", "id": "xWvhFIh8AaI", "title": "Bassoon: Interview and demonstration with principal Nancy Goeres", "description": "Watch the full performance here (starting at 29:10)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xWvhFIh8AaI.mp4/xWvhFIh8AaI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xWvhFIh8AaI.mp4/xWvhFIh8AaI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xWvhFIh8AaI.m3u8/xWvhFIh8AaI.m3u8"}, "slug": "maurice-ravel-daphnis", "video_id": "xWvhFIh8AaI", "youtube_id": "xWvhFIh8AaI", "readable_id": "maurice-ravel-daphnis"}, "Oc8sWN_jNF4": {"duration": 483, "path": "khan/math/recreational-math/vi-hart/doodling-in-math/dragonscales/", "keywords": "", "id": "Oc8sWN_jNF4", "title": "Doodling in math: Dragon scales", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Oc8sWN_jNF4.mp4/Oc8sWN_jNF4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Oc8sWN_jNF4.mp4/Oc8sWN_jNF4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Oc8sWN_jNF4.m3u8/Oc8sWN_jNF4.m3u8"}, "slug": "dragonscales", "video_id": "Oc8sWN_jNF4", "youtube_id": "Oc8sWN_jNF4", "readable_id": "dragonscales"}, "5j81gyHn9i0": {"duration": 318, "path": "khan/math/integral-calculus/integration-techniques/integrate-partial-fraction-expan/integral-partial-fraction/", "keywords": "", "id": "5j81gyHn9i0", "title": "Dividing expressions to evaluate integral", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5j81gyHn9i0.mp4/5j81gyHn9i0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5j81gyHn9i0.mp4/5j81gyHn9i0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5j81gyHn9i0.m3u8/5j81gyHn9i0.m3u8"}, "slug": "integral-partial-fraction", "video_id": "5j81gyHn9i0", "youtube_id": "5j81gyHn9i0", "readable_id": "integral-partial-fraction"}, "iqRTd1NY-pU": {"duration": 463, "path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/arteries-arterioles-venules-and-veins/", "keywords": "", "id": "iqRTd1NY-pU", "title": "Arteries, arterioles, venules, and veins", "description": "Learn the differences between these blood vessels! Rishi is a pediatric infectious disease physician and works at Khan Academy. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iqRTd1NY-pU.mp4/iqRTd1NY-pU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iqRTd1NY-pU.mp4/iqRTd1NY-pU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iqRTd1NY-pU.m3u8/iqRTd1NY-pU.m3u8"}, "slug": "arteries-arterioles-venules-and-veins", "video_id": "iqRTd1NY-pU", "youtube_id": "iqRTd1NY-pU", "readable_id": "arteries-arterioles-venules-and-veins"}, "LTZKp8nOhVU": {"duration": 261, "path": "khan/test-prep/mcat/behavior/social-psychology/what-can-we-learn-from-the-milgram-experiment/", "keywords": "", "id": "LTZKp8nOhVU", "title": "What can we learn from the Milgram experiment", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LTZKp8nOhVU.mp4/LTZKp8nOhVU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LTZKp8nOhVU.mp4/LTZKp8nOhVU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LTZKp8nOhVU.m3u8/LTZKp8nOhVU.m3u8"}, "slug": "what-can-we-learn-from-the-milgram-experiment", "video_id": "LTZKp8nOhVU", "youtube_id": "LTZKp8nOhVU", "readable_id": "what-can-we-learn-from-the-milgram-experiment"}, "w0nqd_HXHPQ": {"duration": 557, "path": "khan/math/pre-algebra/rates-and-ratios/metric-system-tutorial/unit-conversion/", "keywords": "Math, units, metric, conversion, CC_5_MD_1", "id": "w0nqd_HXHPQ", "title": "Unit conversion within the metric system", "description": "Metric unit conversion", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w0nqd_HXHPQ.mp4/w0nqd_HXHPQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w0nqd_HXHPQ.mp4/w0nqd_HXHPQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w0nqd_HXHPQ.m3u8/w0nqd_HXHPQ.m3u8"}, "slug": "unit-conversion", "video_id": "w0nqd_HXHPQ", "youtube_id": "w0nqd_HXHPQ", "readable_id": "unit-conversion"}, "ZqzAOZ9pP9Q": {"duration": 236, "path": "khan/math/on-sixth-grade-math/on-measurement/on-volume/solid-geometry-volume/", "keywords": "volume, geometry, CC_5_MD_3, CC_5_MD_5, CC_5_MD_5_a, CC_5_MD_5_b, CC_7_G_6", "id": "ZqzAOZ9pP9Q", "title": "Find the volume of a triangular prism and cube", "description": "In this tutorial we'll practice finding solid geometry volume. Keep paper and pencil nearby in case you want to remember the formulas.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZqzAOZ9pP9Q.mp4/ZqzAOZ9pP9Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZqzAOZ9pP9Q.mp4/ZqzAOZ9pP9Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZqzAOZ9pP9Q.m3u8/ZqzAOZ9pP9Q.m3u8"}, "slug": "solid-geometry-volume", "video_id": "ZqzAOZ9pP9Q", "youtube_id": "ZqzAOZ9pP9Q", "readable_id": "solid-geometry-volume"}, "pYaIjA4CsKo": {"duration": 416, "path": "khan/math/pre-algebra/exponents-radicals/orders-of-magnitude/patterns-in-zeros-exercise/", "keywords": "", "id": "pYaIjA4CsKo", "title": "Exponents and powers of zero patterns", "description": "Now that we understand how to interpret an exponent and how the patterns in zeros are related to the exponent, we can solve more complicated problems!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pYaIjA4CsKo.mp4/pYaIjA4CsKo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pYaIjA4CsKo.mp4/pYaIjA4CsKo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pYaIjA4CsKo.m3u8/pYaIjA4CsKo.m3u8"}, "slug": "patterns-in-zeros-exercise", "video_id": "pYaIjA4CsKo", "youtube_id": "pYaIjA4CsKo", "readable_id": "patterns-in-zeros-exercise"}, "RXgj09NXNWo": {"duration": 114, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/basic-equation-practice/missing-steps/", "keywords": "", "id": "RXgj09NXNWo", "title": "Figuring out missing algebraic step", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RXgj09NXNWo.mp4/RXgj09NXNWo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RXgj09NXNWo.mp4/RXgj09NXNWo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RXgj09NXNWo.m3u8/RXgj09NXNWo.m3u8"}, "slug": "missing-steps", "video_id": "RXgj09NXNWo", "youtube_id": "RXgj09NXNWo", "readable_id": "missing-steps"}, "0zCcFSO8ouE": {"duration": 772, "path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/example-amplitude-and-period-transformations/", "keywords": "amplitude, period, sin, trig", "id": "0zCcFSO8ouE", "title": "Example: Amplitude and period transformations", "description": "Understanding how the amplitude and period changes as coefficients change.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0zCcFSO8ouE.mp4/0zCcFSO8ouE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0zCcFSO8ouE.mp4/0zCcFSO8ouE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0zCcFSO8ouE.m3u8/0zCcFSO8ouE.m3u8"}, "slug": "example-amplitude-and-period-transformations", "video_id": "0zCcFSO8ouE", "youtube_id": "0zCcFSO8ouE", "readable_id": "example-amplitude-and-period-transformations"}, "SX_DzTb95mM": {"duration": 605, "path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/marriage-penalty/", "keywords": "", "id": "SX_DzTb95mM", "title": "Marriage penalty", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SX_DzTb95mM.mp4/SX_DzTb95mM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SX_DzTb95mM.mp4/SX_DzTb95mM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SX_DzTb95mM.m3u8/SX_DzTb95mM.m3u8"}, "slug": "marriage-penalty", "video_id": "SX_DzTb95mM", "youtube_id": "SX_DzTb95mM", "readable_id": "marriage-penalty"}, "49LcF9Zf9TI": {"duration": 593, "path": "khan/test-prep/mcat/chemical-processes/kinetics/zero-order-reaction-with-calculus/", "keywords": "", "id": "49LcF9Zf9TI", "title": "Zero-order reaction (with calculus)", "description": "Deriving the integrated rate law for zeroth order reactions using calculus. How you can graph zero order rate data to see a linear relationship.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/49LcF9Zf9TI.mp4/49LcF9Zf9TI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/49LcF9Zf9TI.mp4/49LcF9Zf9TI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/49LcF9Zf9TI.m3u8/49LcF9Zf9TI.m3u8"}, "slug": "zero-order-reaction-with-calculus", "video_id": "49LcF9Zf9TI", "youtube_id": "49LcF9Zf9TI", "readable_id": "zero-order-reaction-with-calculus"}, "b6WtwQddAcY": {"duration": 214, "path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/solving-radical-equations-2/", "keywords": "U07_L3_T2_we2, Solving, Radical, Equations, CC_39336_A-REI_2", "id": "b6WtwQddAcY", "title": "Solving radical equations 2", "description": "Solving Radical Equations 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b6WtwQddAcY.mp4/b6WtwQddAcY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b6WtwQddAcY.mp4/b6WtwQddAcY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b6WtwQddAcY.m3u8/b6WtwQddAcY.m3u8"}, "slug": "solving-radical-equations-2", "video_id": "b6WtwQddAcY", "youtube_id": "b6WtwQddAcY", "readable_id": "solving-radical-equations-2"}, "a8g6ma0MBaA": {"duration": 427, "path": "khan/humanities/art-1010/architecture-20c/glass-chair/", "keywords": "chair,Glass (Visual Art Medium),Decorative Arts (Product Category),Design (Industry),design history,1939 New York World's Fair (Event),Plate glass,glass,Henry Turchin,Louis Dierra,1939,Cooper Hewitt,International Style,Smarthistory,Smithsonian,Industrial Design (Field Of Study),Interior Design (Industry),Fiberglass (Visual Art Medium)", "id": "a8g6ma0MBaA", "title": "Glass Chair at the 1939 New York World's Fair", "description": "Chair; ca. 1948; Attributed to Henry Turchin, \u00a0design direction by Louis Dierra (American, active c. 1939); Manufactured by the Pittsburgh Plate Glass Company, \u00a0slumped plate glass, metal, woven textile; Museum purchase through gift of George R. Kravis II and from General Acquisitions Endowment Fund; 2013-1-1, Cooper Hewitt, Smithsonian Design Museum Speakers: Emily Orr, Assistant Curator of Modern and Contemporary American Design, Cooper Hewitt, Smithsonian Design Museum and Dr. Steven Zucker, Smarthistory", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a8g6ma0MBaA.mp4/a8g6ma0MBaA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a8g6ma0MBaA.mp4/a8g6ma0MBaA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a8g6ma0MBaA.m3u8/a8g6ma0MBaA.m3u8"}, "slug": "glass-chair", "video_id": "a8g6ma0MBaA", "youtube_id": "a8g6ma0MBaA", "readable_id": "glass-chair"}, "DMxaK0xjIdE": {"duration": 270, "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-england/henry-fuseli-titania-and-bottom-c-1790/", "keywords": "Fuseli, Titania, GAP, Shakespeare, Google Art Project, Faeries, Khan Academy, Art History, smarthistory, romanticism, English, Royal Academy, dream, Midsummer, Night", "id": "DMxaK0xjIdE", "title": "Fuseli, Titania and Bottom", "description": "Henry Fuseli, Titania and Bottom, c. 1790, oil on canvas, 2172 x 2756 mm (Tate Britain, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DMxaK0xjIdE.mp4/DMxaK0xjIdE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DMxaK0xjIdE.mp4/DMxaK0xjIdE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DMxaK0xjIdE.m3u8/DMxaK0xjIdE.m3u8"}, "slug": "henry-fuseli-titania-and-bottom-c-1790", "video_id": "DMxaK0xjIdE", "youtube_id": "DMxaK0xjIdE", "readable_id": "henry-fuseli-titania-and-bottom-c-1790"}, "XZRQhkii0h0": {"duration": 183, "path": "khan/math/algebra-basics/core-algebra-foundations/world-of-exponents-college-readiness/introduction-to-exponents/", "keywords": "", "id": "XZRQhkii0h0", "title": "Introduction to exponents", "description": "Taking an exponent is basically the act of repeated multiplication. You know how to multiply, right? If so, understanding exponents is completely within your grasp!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XZRQhkii0h0.mp4/XZRQhkii0h0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XZRQhkii0h0.mp4/XZRQhkii0h0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XZRQhkii0h0.m3u8/XZRQhkii0h0.m3u8"}, "slug": "introduction-to-exponents", "video_id": "XZRQhkii0h0", "youtube_id": "XZRQhkii0h0", "readable_id": "introduction-to-exponents"}, "MiyFReTAdCA": {"duration": 409, "path": "khan/math/geometry/similarity/cc-solving-prob-similar-tri/triangle-similarity-in-pool/", "keywords": "", "id": "MiyFReTAdCA", "title": "Triangle similarity in pool", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MiyFReTAdCA.mp4/MiyFReTAdCA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MiyFReTAdCA.mp4/MiyFReTAdCA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MiyFReTAdCA.m3u8/MiyFReTAdCA.m3u8"}, "slug": "triangle-similarity-in-pool", "video_id": "MiyFReTAdCA", "youtube_id": "MiyFReTAdCA", "readable_id": "triangle-similarity-in-pool"}, "bVHuI_QpYIM": {"duration": 436, "path": "khan/science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas/heat-of-vaporization-of-water-and-ethanol/", "keywords": "education,online learning,learning,lessons,heat of vaporization", "id": "bVHuI_QpYIM", "title": "Heat of vaporization of water and ethanol", "description": "Heat of vaporization of water and ethanol", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bVHuI_QpYIM.mp4/bVHuI_QpYIM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bVHuI_QpYIM.mp4/bVHuI_QpYIM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bVHuI_QpYIM.m3u8/bVHuI_QpYIM.m3u8"}, "slug": "heat-of-vaporization-of-water-and-ethanol", "video_id": "bVHuI_QpYIM", "youtube_id": "bVHuI_QpYIM", "readable_id": "heat-of-vaporization-of-water-and-ethanol"}, "7udSVZ7bDb8": {"duration": 448, "path": "khan/science/biology/macromolecules/proteins-and-amino-acids/tertiary-structure-of-proteins/", "keywords": "education,online learning,learning,lessons,tertiary structure proteins", "id": "7udSVZ7bDb8", "title": "Tertiary structure of proteins", "description": "How side chain interactions can impact the tertiary structure of proteins.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7udSVZ7bDb8.mp4/7udSVZ7bDb8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7udSVZ7bDb8.mp4/7udSVZ7bDb8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7udSVZ7bDb8.m3u8/7udSVZ7bDb8.m3u8"}, "slug": "tertiary-structure-of-proteins", "video_id": "7udSVZ7bDb8", "youtube_id": "7udSVZ7bDb8", "readable_id": "tertiary-structure-of-proteins"}, "_vBJkK4eocA": {"duration": 549, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/parts-of-a-nephron/", "keywords": "", "id": "_vBJkK4eocA", "title": "Parts of a nephron", "description": "Learn about the 5 major parts of the kidney's nephron. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_vBJkK4eocA.mp4/_vBJkK4eocA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_vBJkK4eocA.mp4/_vBJkK4eocA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_vBJkK4eocA.m3u8/_vBJkK4eocA.m3u8"}, "slug": "parts-of-a-nephron", "video_id": "_vBJkK4eocA", "youtube_id": "_vBJkK4eocA", "readable_id": "parts-of-a-nephron"}, "AE1pkp-_cKE": {"duration": 477, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/hydration-of-alkynes/", "keywords": "", "id": "AE1pkp-_cKE", "title": "Hydration of alkynes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AE1pkp-_cKE.mp4/AE1pkp-_cKE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AE1pkp-_cKE.mp4/AE1pkp-_cKE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AE1pkp-_cKE.m3u8/AE1pkp-_cKE.m3u8"}, "slug": "hydration-of-alkynes", "video_id": "AE1pkp-_cKE", "youtube_id": "AE1pkp-_cKE", "readable_id": "hydration-of-alkynes"}, "qGbRrM5hWq4": {"duration": 125, "path": "khan/science/discoveries-projects/robots/spider_bot/10-spider-connect-the-power-and-signal-wires-from-the-motor-controller-to-the-arduino/", "keywords": "", "id": "qGbRrM5hWq4", "title": "Motor controller connections", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qGbRrM5hWq4.mp4/qGbRrM5hWq4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qGbRrM5hWq4.mp4/qGbRrM5hWq4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qGbRrM5hWq4.m3u8/qGbRrM5hWq4.m3u8"}, "slug": "10-spider-connect-the-power-and-signal-wires-from-the-motor-controller-to-the-arduino", "video_id": "qGbRrM5hWq4", "youtube_id": "qGbRrM5hWq4", "readable_id": "10-spider-connect-the-power-and-signal-wires-from-the-motor-controller-to-the-arduino"}, "nZrxs-U9d8o": {"duration": 267, "path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/visual-anti-derivative/", "keywords": "", "id": "nZrxs-U9d8o", "title": "Visually determining antiderivative", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nZrxs-U9d8o.mp4/nZrxs-U9d8o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nZrxs-U9d8o.mp4/nZrxs-U9d8o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nZrxs-U9d8o.m3u8/nZrxs-U9d8o.m3u8"}, "slug": "visual-anti-derivative", "video_id": "nZrxs-U9d8o", "youtube_id": "nZrxs-U9d8o", "readable_id": "visual-anti-derivative"}, "0lY4PcCYoyE": {"duration": 188, "path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-and-range-2/", "keywords": "U03_L2_T2_we2, Domain, and, Range, CC_8_F_1, CC_39336_F-IF_1", "id": "0lY4PcCYoyE", "title": "Domain and range 2", "description": "Domain and Range 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0lY4PcCYoyE.mp4/0lY4PcCYoyE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0lY4PcCYoyE.mp4/0lY4PcCYoyE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0lY4PcCYoyE.m3u8/0lY4PcCYoyE.m3u8"}, "slug": "domain-and-range-2", "video_id": "0lY4PcCYoyE", "youtube_id": "0lY4PcCYoyE", "readable_id": "domain-and-range-2"}, "oqAYqT70EBQ": {"duration": 208, "path": "khan/math/algebra2/exponential_and_logarithmic_func/logarithmic-equations/solving-logarithmic-equations_dup_1/", "keywords": "u18_l2_t1_we4, Solving, Logarithmic, Equations", "id": "oqAYqT70EBQ", "title": "Solving logarithmic equations", "description": "Solving Logarithmic Equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oqAYqT70EBQ.mp4/oqAYqT70EBQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oqAYqT70EBQ.mp4/oqAYqT70EBQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oqAYqT70EBQ.m3u8/oqAYqT70EBQ.m3u8"}, "slug": "solving-logarithmic-equations_dup_1", "video_id": "oqAYqT70EBQ", "youtube_id": "oqAYqT70EBQ", "readable_id": "solving-logarithmic-equations_dup_1"}, "a9aUMpGs6c8": {"duration": 475, "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/economic-growth-through-investment/", "keywords": "economics, PPF, investment, consumption", "id": "a9aUMpGs6c8", "title": "Economic growth through investment", "description": "How investing for capital formation can expand the production possibilities frontier (PPF)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a9aUMpGs6c8.mp4/a9aUMpGs6c8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a9aUMpGs6c8.mp4/a9aUMpGs6c8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a9aUMpGs6c8.m3u8/a9aUMpGs6c8.m3u8"}, "slug": "economic-growth-through-investment", "video_id": "a9aUMpGs6c8", "youtube_id": "a9aUMpGs6c8", "readable_id": "economic-growth-through-investment"}, "n5cKWjZqpIE": {"duration": 350, "path": "khan/math/geometry/geometric-constructions/constructing-tangents/constructing-a-tangent-line-using-compass-and-straightedge/", "keywords": "", "id": "n5cKWjZqpIE", "title": "Constructing a tangent line using compass and straightedge", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n5cKWjZqpIE.mp4/n5cKWjZqpIE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n5cKWjZqpIE.mp4/n5cKWjZqpIE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n5cKWjZqpIE.m3u8/n5cKWjZqpIE.m3u8"}, "slug": "constructing-a-tangent-line-using-compass-and-straightedge", "video_id": "n5cKWjZqpIE", "youtube_id": "n5cKWjZqpIE", "readable_id": "constructing-a-tangent-line-using-compass-and-straightedge"}, "YJBqGM29_64": {"duration": 652, "path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-2-book-value/", "keywords": "bailout, fed, treasury, insolvency, credit, crunch, book, value", "id": "YJBqGM29_64", "title": "Bailout 2: Book value", "description": "Hypothetical bank balance sheet. What book value means.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YJBqGM29_64.mp4/YJBqGM29_64.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YJBqGM29_64.mp4/YJBqGM29_64.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YJBqGM29_64.m3u8/YJBqGM29_64.m3u8"}, "slug": "bailout-2-book-value", "video_id": "YJBqGM29_64", "youtube_id": "YJBqGM29_64", "readable_id": "bailout-2-book-value"}, "-jXFckR2yoY": {"duration": 129, "path": "khan/humanities/art-1010/early-abstraction/cubism/moma-picasso-glassguitarbottle/", "keywords": "", "id": "-jXFckR2yoY", "title": "Pablo Picasso, \"Guitar, Glass, and Bottle\"", "description": "To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-jXFckR2yoY.mp4/-jXFckR2yoY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-jXFckR2yoY.mp4/-jXFckR2yoY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-jXFckR2yoY.m3u8/-jXFckR2yoY.m3u8"}, "slug": "moma-picasso-glassguitarbottle", "video_id": "-jXFckR2yoY", "youtube_id": "-jXFckR2yoY", "readable_id": "moma-picasso-glassguitarbottle"}, "Nnqp_3HMlDU": {"duration": 533, "path": "khan/test-prep/mcat/organ-systems/hematologic-system/blood-types/", "keywords": "", "id": "Nnqp_3HMlDU", "title": "Blood types", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Nnqp_3HMlDU.mp4/Nnqp_3HMlDU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Nnqp_3HMlDU.mp4/Nnqp_3HMlDU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Nnqp_3HMlDU.m3u8/Nnqp_3HMlDU.m3u8"}, "slug": "blood-types", "video_id": "Nnqp_3HMlDU", "youtube_id": "Nnqp_3HMlDU", "readable_id": "blood-types"}, "-kKCjwNvNkQ": {"duration": 475, "path": "khan/humanities/history/euro-hist/wo/beginning-of-world-war-ii/", "keywords": "", "id": "-kKCjwNvNkQ", "title": "Beginning of World War II", "description": "An overview of the run up to and very beginnings of World War II.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-kKCjwNvNkQ.mp4/-kKCjwNvNkQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-kKCjwNvNkQ.mp4/-kKCjwNvNkQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-kKCjwNvNkQ.m3u8/-kKCjwNvNkQ.m3u8"}, "slug": "beginning-of-world-war-ii", "video_id": "-kKCjwNvNkQ", "youtube_id": "-kKCjwNvNkQ", "readable_id": "beginning-of-world-war-ii"}, "d7b38SLI6nc": {"duration": 318, "path": "khan/humanities/art-americas/south-america-early/amazonian-people/munduruku-headdress-a-glimpse-of-life-in-the-amazon-rainforest/", "keywords": "", "id": "d7b38SLI6nc", "title": "Munduruku\u0301 Headdress: a glimpse of life in the Amazon rainforest", "description": "A conversation between Dr. Jago Cooper (Curator, Head of the Americas, The British Museum) and Dr. Steven Zucker in front of: Headdress (coifa), before 1869, Arara, Mutum and Macaw(?) feathers, cord, 40 x 24 cm, Munduruk\u00fa people, Para, Brazil (The British Museum)\nSpecial thanks to Dr. Jago Cooper, Kate Jarvis, Matthew Cock, and The British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d7b38SLI6nc.mp4/d7b38SLI6nc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d7b38SLI6nc.mp4/d7b38SLI6nc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d7b38SLI6nc.m3u8/d7b38SLI6nc.m3u8"}, "slug": "munduruku-headdress-a-glimpse-of-life-in-the-amazon-rainforest", "video_id": "d7b38SLI6nc", "youtube_id": "d7b38SLI6nc", "readable_id": "munduruku-headdress-a-glimpse-of-life-in-the-amazon-rainforest"}, "Dpo_-GrMpNE": {"duration": 217, "path": "khan/math/algebra2/logarithms-tutorial/natural_logarithm/natural-logarithm-with-a-calculator/", "keywords": "u18_l3_t1_we1, Natural, Logarithm, with, Calculator", "id": "Dpo_-GrMpNE", "title": "Natural logarithm with a calculator", "description": "Natural Logarithm with a Calculator", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Dpo_-GrMpNE.mp4/Dpo_-GrMpNE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Dpo_-GrMpNE.mp4/Dpo_-GrMpNE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Dpo_-GrMpNE.m3u8/Dpo_-GrMpNE.m3u8"}, "slug": "natural-logarithm-with-a-calculator", "video_id": "Dpo_-GrMpNE", "youtube_id": "Dpo_-GrMpNE", "readable_id": "natural-logarithm-with-a-calculator"}, "vSsK7Rfa3yA": {"duration": 634, "path": "khan/science/physics/work-and-energy/mechanical-advantage/mechanical-advantage-part-3/", "keywords": "physics, wedge, pulley, mechanical, advantage, work, energy", "id": "vSsK7Rfa3yA", "title": "Mechanical advantage (part 3)", "description": "Introduction to pulleys and wedges", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vSsK7Rfa3yA.mp4/vSsK7Rfa3yA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vSsK7Rfa3yA.mp4/vSsK7Rfa3yA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vSsK7Rfa3yA.m3u8/vSsK7Rfa3yA.m3u8"}, "slug": "mechanical-advantage-part-3", "video_id": "vSsK7Rfa3yA", "youtube_id": "vSsK7Rfa3yA", "readable_id": "mechanical-advantage-part-3"}, "zg3-miF4qeg": {"duration": 311, "path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/part-2-of-shell-method-with-2-functions-of-y/", "keywords": "", "id": "zg3-miF4qeg", "title": "Part 2 of shell method with 2 functions of y", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zg3-miF4qeg.mp4/zg3-miF4qeg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zg3-miF4qeg.mp4/zg3-miF4qeg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zg3-miF4qeg.m3u8/zg3-miF4qeg.m3u8"}, "slug": "part-2-of-shell-method-with-2-functions-of-y", "video_id": "zg3-miF4qeg", "youtube_id": "zg3-miF4qeg", "readable_id": "part-2-of-shell-method-with-2-functions-of-y"}, "lvAYFUIEpFI": {"duration": 854, "path": "khan/partner-content/nasa/measuringuniverse/orbital-mechanics/conic-sections-intro-to-ellipses/", "keywords": "ellipse, conic, section", "id": "lvAYFUIEpFI", "title": "Conic sections: Intro to ellipses", "description": "Introduction to the ellipse.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lvAYFUIEpFI.mp4/lvAYFUIEpFI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lvAYFUIEpFI.mp4/lvAYFUIEpFI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lvAYFUIEpFI.m3u8/lvAYFUIEpFI.m3u8"}, "slug": "conic-sections-intro-to-ellipses", "video_id": "lvAYFUIEpFI", "youtube_id": "lvAYFUIEpFI", "readable_id": "conic-sections-intro-to-ellipses"}, "CLQRZ2UbQ4Q": {"duration": 180, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/exp_unknown_vars/evaluating-expressions-with-unknown-variables-2/", "keywords": "", "id": "CLQRZ2UbQ4Q", "title": "Evaluating expressions with unknown variables 2", "description": "A few more examples where we are asked to evaluate an expression with multiple uknown variables", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CLQRZ2UbQ4Q.mp4/CLQRZ2UbQ4Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CLQRZ2UbQ4Q.mp4/CLQRZ2UbQ4Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CLQRZ2UbQ4Q.m3u8/CLQRZ2UbQ4Q.m3u8"}, "slug": "evaluating-expressions-with-unknown-variables-2", "video_id": "CLQRZ2UbQ4Q", "youtube_id": "CLQRZ2UbQ4Q", "readable_id": "evaluating-expressions-with-unknown-variables-2"}, "P2IWGlR1SHs": {"duration": 469, "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/speculative-attack-on-a-currency/", "keywords": "Speculative, Attack, on, a, Currency", "id": "P2IWGlR1SHs", "title": "Speculative attack on a currency", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P2IWGlR1SHs.mp4/P2IWGlR1SHs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P2IWGlR1SHs.mp4/P2IWGlR1SHs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P2IWGlR1SHs.m3u8/P2IWGlR1SHs.m3u8"}, "slug": "speculative-attack-on-a-currency", "video_id": "P2IWGlR1SHs", "youtube_id": "P2IWGlR1SHs", "readable_id": "speculative-attack-on-a-currency"}, "_DEScXFyI8s": {"duration": 441, "path": "khan/test-prep/mcat/chemical-processes/separations-purifications/calculating-retention-factors-for-tlc/", "keywords": "retention factors, TLC, chromatography", "id": "_DEScXFyI8s", "title": "Calculating retention factors for TLC", "description": "Learn how to calculate retention factors (Rf) for thin layer chromatography (TLC). By Angela Guerrero.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_DEScXFyI8s.mp4/_DEScXFyI8s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_DEScXFyI8s.mp4/_DEScXFyI8s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_DEScXFyI8s.m3u8/_DEScXFyI8s.m3u8"}, "slug": "calculating-retention-factors-for-tlc", "video_id": "_DEScXFyI8s", "youtube_id": "_DEScXFyI8s", "readable_id": "calculating-retention-factors-for-tlc"}, "oAOq55MPJpM": {"duration": 550, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/standard-reduction-potentials/", "keywords": "", "id": "oAOq55MPJpM", "title": "Standard reduction potentials", "description": "How to use a table of standard reduction potentials to calculate standard cell potential. Identifying trends in oxidizing and reducing agent strength.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oAOq55MPJpM.mp4/oAOq55MPJpM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oAOq55MPJpM.mp4/oAOq55MPJpM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oAOq55MPJpM.m3u8/oAOq55MPJpM.m3u8"}, "slug": "standard-reduction-potentials", "video_id": "oAOq55MPJpM", "youtube_id": "oAOq55MPJpM", "readable_id": "standard-reduction-potentials"}, "lBqShvm4QRA": {"duration": 371, "path": "khan/test-prep/mcat/processing-the-environment/language/language-and-the-brain/", "keywords": "language, brain, aphasia, split-brain", "id": "lBqShvm4QRA", "title": "Language and the brain: Aphasia and split-brain patients", "description": "Learn about language areas of the brain and the effects of damage to those parts of the brain. By Carole Yue.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lBqShvm4QRA.mp4/lBqShvm4QRA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lBqShvm4QRA.mp4/lBqShvm4QRA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lBqShvm4QRA.m3u8/lBqShvm4QRA.m3u8"}, "slug": "language-and-the-brain", "video_id": "lBqShvm4QRA", "youtube_id": "lBqShvm4QRA", "readable_id": "language-and-the-brain"}, "0w96SqrvVjw": {"duration": 587, "path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/biologic-redox-reactions-of-alcohols-and-phenols/", "keywords": "", "id": "0w96SqrvVjw", "title": "Biological redox reactions of alcohols and phenols", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0w96SqrvVjw.mp4/0w96SqrvVjw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0w96SqrvVjw.mp4/0w96SqrvVjw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0w96SqrvVjw.m3u8/0w96SqrvVjw.m3u8"}, "slug": "biologic-redox-reactions-of-alcohols-and-phenols", "video_id": "0w96SqrvVjw", "youtube_id": "0w96SqrvVjw", "readable_id": "biologic-redox-reactions-of-alcohols-and-phenols"}, "ArmlWtDnuys": {"duration": 722, "path": "khan/science/biology/cellular-respiration-and-fermentation/glycolysis/glycolysis-overview/", "keywords": "education,online learning,learning,lessons,Glycolysis,Biochemistry (Field Of Study)", "id": "ArmlWtDnuys", "title": "Steps of glycolysis", "description": "Introduction to glycolysis. Role of glycolysis in producing ATPs and NADHs and converting glucose to pyruvates.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ArmlWtDnuys.mp4/ArmlWtDnuys.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ArmlWtDnuys.mp4/ArmlWtDnuys.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ArmlWtDnuys.m3u8/ArmlWtDnuys.m3u8"}, "slug": "glycolysis-overview", "video_id": "ArmlWtDnuys", "youtube_id": "ArmlWtDnuys", "readable_id": "glycolysis-overview"}, "1qifvZnpKjU": {"duration": 774, "path": "khan/science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases/atherosclerosis-part-1/", "keywords": "", "id": "1qifvZnpKjU", "title": "Atherosclerosis - part 1", "description": "See how Atherosclerosis (Fat in the blood vessel wall) hardens the arterial wall and makes it harder for blood to flow through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1qifvZnpKjU.mp4/1qifvZnpKjU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1qifvZnpKjU.mp4/1qifvZnpKjU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1qifvZnpKjU.m3u8/1qifvZnpKjU.m3u8"}, "slug": "atherosclerosis-part-1", "video_id": "1qifvZnpKjU", "youtube_id": "1qifvZnpKjU", "readable_id": "atherosclerosis-part-1"}, "5-McqAO8_Qw": {"duration": 766, "path": "khan/test-prep/mcat/processing-the-environment/taste-gustation-and-smell-olfaction/olfaction-structure-and-function/", "keywords": "", "id": "5-McqAO8_Qw", "title": "Olfaction - structure and function", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5-McqAO8_Qw.mp4/5-McqAO8_Qw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5-McqAO8_Qw.mp4/5-McqAO8_Qw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5-McqAO8_Qw.m3u8/5-McqAO8_Qw.m3u8"}, "slug": "olfaction-structure-and-function", "video_id": "5-McqAO8_Qw", "youtube_id": "5-McqAO8_Qw", "readable_id": "olfaction-structure-and-function"}, "NqasGo5q5yQ": {"duration": 314, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/muscle-innervation/", "keywords": "muscle, innervation", "id": "NqasGo5q5yQ", "title": "Muscle innervation", "description": "Which muscles do we voluntarily control? Which muscles do we have NO control over? What's the difference between sympathetic and parasympathetic innervation? Learn about how our brain splits its control over the body into autonomic and somatic nervous systems.\u00a0 By Raja Narayan.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NqasGo5q5yQ.mp4/NqasGo5q5yQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NqasGo5q5yQ.mp4/NqasGo5q5yQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NqasGo5q5yQ.m3u8/NqasGo5q5yQ.m3u8"}, "slug": "muscle-innervation", "video_id": "NqasGo5q5yQ", "youtube_id": "NqasGo5q5yQ", "readable_id": "muscle-innervation"}, "H-HfmyUzPw8": {"duration": 341, "path": "khan/math/algebra/systems-of-linear-equations/graphical-representation-of-systems-of-equations/solving-the-troll-riddle-visually/", "keywords": "simultaneous", "id": "H-HfmyUzPw8", "title": "Solving the troll riddle visually", "description": "Solving the system of equations visually. Now we can save the prince/princess.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H-HfmyUzPw8.mp4/H-HfmyUzPw8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H-HfmyUzPw8.mp4/H-HfmyUzPw8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H-HfmyUzPw8.m3u8/H-HfmyUzPw8.m3u8"}, "slug": "solving-the-troll-riddle-visually", "video_id": "H-HfmyUzPw8", "youtube_id": "H-HfmyUzPw8", "readable_id": "solving-the-troll-riddle-visually"}, "ut1zmfolM9E": {"duration": 420, "path": "khan/test-prep/mcat/behavior/learning-slug/operant-conditioning-positive-and-negative-reinforcement-and-punishment/", "keywords": "", "id": "ut1zmfolM9E", "title": "Operant conditioning: Positive-and-negative reinforcement and punishment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ut1zmfolM9E.mp4/ut1zmfolM9E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ut1zmfolM9E.mp4/ut1zmfolM9E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ut1zmfolM9E.m3u8/ut1zmfolM9E.m3u8"}, "slug": "operant-conditioning-positive-and-negative-reinforcement-and-punishment", "video_id": "ut1zmfolM9E", "youtube_id": "ut1zmfolM9E", "readable_id": "operant-conditioning-positive-and-negative-reinforcement-and-punishment"}, "s4JBqLoY3tY": {"duration": 402, "path": "khan/test-prep/mcat/processing-the-environment/attention-language/divided-selective-attention-inattentional-change-blindness/", "keywords": "attention, selective attention, blindness", "id": "s4JBqLoY3tY", "title": "Divided attention, selective attention, inattentional blindness, & change blindness", "description": "Learn about divided attention, selective attention, inattentional blindness, & change blindness. By Carole Yue.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/s4JBqLoY3tY.mp4/s4JBqLoY3tY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/s4JBqLoY3tY.mp4/s4JBqLoY3tY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/s4JBqLoY3tY.m3u8/s4JBqLoY3tY.m3u8"}, "slug": "divided-selective-attention-inattentional-change-blindness", "video_id": "s4JBqLoY3tY", "youtube_id": "s4JBqLoY3tY", "readable_id": "divided-selective-attention-inattentional-change-blindness"}, "iIBQm3me8cs": {"duration": 390, "path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/calculating-state-taxes-and-take-home-pay/", "keywords": "", "id": "iIBQm3me8cs", "title": "Calculating state taxes and take home pay", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iIBQm3me8cs.mp4/iIBQm3me8cs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iIBQm3me8cs.mp4/iIBQm3me8cs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iIBQm3me8cs.m3u8/iIBQm3me8cs.m3u8"}, "slug": "calculating-state-taxes-and-take-home-pay", "video_id": "iIBQm3me8cs", "youtube_id": "iIBQm3me8cs", "readable_id": "calculating-state-taxes-and-take-home-pay"}, "e3XNXl_6NSg": {"duration": 66, "path": "khan/science/discoveries-projects/discoveries/batteries/electrode-distance-test/", "keywords": "electrode distance", "id": "e3XNXl_6NSg", "title": "Electrode (distance test)", "description": "Does the distance between the copper and zinc electrodes matter? What happens to the deflection when we hold them close vs. far apart? Why is there a difference?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e3XNXl_6NSg.mp4/e3XNXl_6NSg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e3XNXl_6NSg.mp4/e3XNXl_6NSg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e3XNXl_6NSg.m3u8/e3XNXl_6NSg.m3u8"}, "slug": "electrode-distance-test", "video_id": "e3XNXl_6NSg", "youtube_id": "e3XNXl_6NSg", "readable_id": "electrode-distance-test"}, "bxGnbVOtRYo": {"duration": 393, "path": "khan/math/multivariable-calculus/divergence_theorem_topic/region_types_3d/type-iii-regions-in-three-dimensions/", "keywords": "", "id": "bxGnbVOtRYo", "title": "Type III regions in three dimensions", "description": "Definition and intuition for type 3 regions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bxGnbVOtRYo.mp4/bxGnbVOtRYo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bxGnbVOtRYo.mp4/bxGnbVOtRYo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bxGnbVOtRYo.m3u8/bxGnbVOtRYo.m3u8"}, "slug": "type-iii-regions-in-three-dimensions", "video_id": "bxGnbVOtRYo", "youtube_id": "bxGnbVOtRYo", "readable_id": "type-iii-regions-in-three-dimensions"}, "IXycPq7MnwE": {"duration": 125, "path": "khan/computing/computer-programming/sql/sql-basics/welcome-to-sql/", "keywords": "", "id": "IXycPq7MnwE", "title": "Welcome to SQL", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IXycPq7MnwE.mp4/IXycPq7MnwE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IXycPq7MnwE.mp4/IXycPq7MnwE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IXycPq7MnwE.m3u8/IXycPq7MnwE.m3u8"}, "slug": "welcome-to-sql", "video_id": "IXycPq7MnwE", "youtube_id": "IXycPq7MnwE", "readable_id": "welcome-to-sql"}, "3uO_uPb9H8w": {"duration": 550, "path": "khan/math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order/2nd-order-linear-homogeneous-differential-equations-4/", "keywords": "2nd, Order, Linear, Homogeneous, Differential, Equations", "id": "3uO_uPb9H8w", "title": "2nd order linear homogeneous differential equations 4", "description": "Another example with initial conditions!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3uO_uPb9H8w.mp4/3uO_uPb9H8w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3uO_uPb9H8w.mp4/3uO_uPb9H8w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3uO_uPb9H8w.m3u8/3uO_uPb9H8w.m3u8"}, "slug": "2nd-order-linear-homogeneous-differential-equations-4", "video_id": "3uO_uPb9H8w", "youtube_id": "3uO_uPb9H8w", "readable_id": "2nd-order-linear-homogeneous-differential-equations-4"}, "AznXSVx2xX0": {"duration": 630, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/absorption-and-emission/", "keywords": "", "id": "AznXSVx2xX0", "title": "Absorption and emission", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AznXSVx2xX0.mp4/AznXSVx2xX0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AznXSVx2xX0.mp4/AznXSVx2xX0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AznXSVx2xX0.m3u8/AznXSVx2xX0.m3u8"}, "slug": "absorption-and-emission", "video_id": "AznXSVx2xX0", "youtube_id": "AznXSVx2xX0", "readable_id": "absorption-and-emission"}, "jb8mFpA1YI8": {"duration": 185, "path": "khan/math/arithmetic/multiplication-division/multi_digit_multiplication/multiplying-by-multiples-of-10/", "keywords": "", "id": "jb8mFpA1YI8", "title": "Multiplying by multiples of 10", "description": "Decompose multiples of ten to multiply.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jb8mFpA1YI8.mp4/jb8mFpA1YI8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jb8mFpA1YI8.mp4/jb8mFpA1YI8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jb8mFpA1YI8.m3u8/jb8mFpA1YI8.m3u8"}, "slug": "multiplying-by-multiples-of-10", "video_id": "jb8mFpA1YI8", "youtube_id": "jb8mFpA1YI8", "readable_id": "multiplying-by-multiples-of-10"}, "RlLrvnnTDDU": {"duration": 464, "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/pathophysiology-type-ii-diabetes/", "keywords": "", "id": "RlLrvnnTDDU", "title": "Pathophysiology - Type II diabetes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RlLrvnnTDDU.mp4/RlLrvnnTDDU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RlLrvnnTDDU.mp4/RlLrvnnTDDU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RlLrvnnTDDU.m3u8/RlLrvnnTDDU.m3u8"}, "slug": "pathophysiology-type-ii-diabetes", "video_id": "RlLrvnnTDDU", "youtube_id": "RlLrvnnTDDU", "readable_id": "pathophysiology-type-ii-diabetes"}, "wHuY97vss18": {"duration": 909, "path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/sums-and-scalar-multiples-of-linear-transformations/", "keywords": "linear, transformation, algebra, matrix", "id": "wHuY97vss18", "title": "Sums and scalar multiples of linear transformations", "description": "Sums and Scalar Multiples of Linear Transformations. Definitions of matrix addition and scalar multiplication.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wHuY97vss18.mp4/wHuY97vss18.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wHuY97vss18.mp4/wHuY97vss18.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wHuY97vss18.m3u8/wHuY97vss18.m3u8"}, "slug": "sums-and-scalar-multiples-of-linear-transformations", "video_id": "wHuY97vss18", "youtube_id": "wHuY97vss18", "readable_id": "sums-and-scalar-multiples-of-linear-transformations"}, "uLjvEsHi_qU": {"duration": 160, "path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/precaution/", "keywords": "ceramic, danger, death, nature, sculpture, Africa", "id": "uLjvEsHi_qU", "title": "Hippopotamus", "description": "Met curator Isabel St\u00fcnkel on precaution in Hippopotamus dating from Egypt\u2019s Middle Kingdom,\u00a0c. 1961\u20131878 B.C.E.\n\nThis well-formed statuette of a hippopotamus (popularly called \"William\") demonstrates the Egyptian artist's appreciation for the natural world. It was molded in faience, a ceramic material made of ground quartz. Beneath the blue-green glaze, the body was painted with the outlines of river plants, symbolizing the marshes in which the animal lived.\n\nThe seemingly benign appearance that this figurine presents is deceptive. To the ancient Egyptians, the hippopotamus was one of the most dangerous animals in their world. The huge creatures were a hazard for small fishing boats and other rivercraft. The beast might also be encountered on the waterways in the journey to the afterlife. As such, the hippopotamus was a force of nature that needed to be propitiated and controlled, both in this life and the next. This example was one of a pair found in a shaft associated with the tomb chapel of the steward Senbi II at Meir, an Upper Egyptian site about thirty miles south of modern Asyut. Three of its legs have been restored because they were purposely broken to prevent the creature from harming the deceased. The hippo was part of Senbi's burial equipment, which included a canopic box (also in the Metropolitan Museum), a coffin, and numerous models of boats and food production.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit\u00a0Find an Educator Resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uLjvEsHi_qU.mp4/uLjvEsHi_qU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uLjvEsHi_qU.mp4/uLjvEsHi_qU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uLjvEsHi_qU.m3u8/uLjvEsHi_qU.m3u8"}, "slug": "precaution", "video_id": "uLjvEsHi_qU", "youtube_id": "uLjvEsHi_qU", "readable_id": "precaution"}, "UXOcWAfBdZg": {"duration": 500, "path": "khan/science/chemistry/periodic-table/copy-of-periodic-table-of-elements/periodic-table-groups/", "keywords": "", "id": "UXOcWAfBdZg", "title": "Groups of the periodic table", "description": "What is a group in the periodic table, and what do elements in a group have in common?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UXOcWAfBdZg.mp4/UXOcWAfBdZg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UXOcWAfBdZg.mp4/UXOcWAfBdZg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UXOcWAfBdZg.m3u8/UXOcWAfBdZg.m3u8"}, "slug": "periodic-table-groups", "video_id": "UXOcWAfBdZg", "youtube_id": "UXOcWAfBdZg", "readable_id": "periodic-table-groups"}, "fuSOY9r1R6w": {"duration": 951, "path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/vector-field-line-integrals-dependent-on-path-direction/", "keywords": "line, vector, integral, field, direction, curve", "id": "fuSOY9r1R6w", "title": "Vector field line integrals dependent on path direction", "description": "Showing that, unlike line integrals of scalar fields, line integrals over vector fields are path direction dependent", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fuSOY9r1R6w.mp4/fuSOY9r1R6w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fuSOY9r1R6w.mp4/fuSOY9r1R6w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fuSOY9r1R6w.m3u8/fuSOY9r1R6w.m3u8"}, "slug": "vector-field-line-integrals-dependent-on-path-direction", "video_id": "fuSOY9r1R6w", "youtube_id": "fuSOY9r1R6w", "readable_id": "vector-field-line-integrals-dependent-on-path-direction"}, "H5eIE7zdnvI": {"duration": 365, "path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/tangent-slope-as-limiting-value-of-secant-slope-example-2/", "keywords": "", "id": "H5eIE7zdnvI", "title": "Tangent slope as limiting value of secant slope example 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H5eIE7zdnvI.mp4/H5eIE7zdnvI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H5eIE7zdnvI.mp4/H5eIE7zdnvI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H5eIE7zdnvI.m3u8/H5eIE7zdnvI.m3u8"}, "slug": "tangent-slope-as-limiting-value-of-secant-slope-example-2", "video_id": "H5eIE7zdnvI", "youtube_id": "H5eIE7zdnvI", "readable_id": "tangent-slope-as-limiting-value-of-secant-slope-example-2"}, "3Xcae0OGavk": {"duration": 91, "path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/comparing-whole-number-place-values/", "keywords": "", "id": "3Xcae0OGavk", "title": "Comparing whole number place values", "description": "Which number is bigger? Which number is smaller? Are they equal? Use your knowledge of place value to find the answer.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3Xcae0OGavk.mp4/3Xcae0OGavk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3Xcae0OGavk.mp4/3Xcae0OGavk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3Xcae0OGavk.m3u8/3Xcae0OGavk.m3u8"}, "slug": "comparing-whole-number-place-values", "video_id": "3Xcae0OGavk", "youtube_id": "3Xcae0OGavk", "readable_id": "comparing-whole-number-place-values"}, "mDmRYfma9C0": {"duration": 454, "path": "khan/math/algebra/quadratics/quadratic_odds_ends/quadratic-formula-proof/", "keywords": "quadratic, formula, algebra, completing, square, CC_39336_A-REI_4_a", "id": "mDmRYfma9C0", "title": "Quadratic formula (proof)", "description": "Deriving the quadratic formula by completing the square.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mDmRYfma9C0.mp4/mDmRYfma9C0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mDmRYfma9C0.mp4/mDmRYfma9C0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mDmRYfma9C0.m3u8/mDmRYfma9C0.m3u8"}, "slug": "quadratic-formula-proof", "video_id": "mDmRYfma9C0", "youtube_id": "mDmRYfma9C0", "readable_id": "quadratic-formula-proof"}, "ybOKAzIVp70": {"duration": 610, "path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-25/", "keywords": "crash course", "id": "ybOKAzIVp70", "title": "The Spanish Empire, silver, & runaway inflation", "description": "In which John Green explores how Spain went from being a middling European power to one of the most powerful empires on Earth, thanks to their plunder of the New World in the 16th and 17th centuries. Learn how Spain managed to destroy the two biggest pre-Columbian civilizations, mine a mountain made of silver, mishandle their economy, and lose it all by the mid-1700s. Come along for the roller coaster ride with Charles I (he was also Charles V), Philip II, Atahualpa, Moctezuma, Hern\u00e1n Cort\u00e9s, and Francisco Pizarro as Spain rises and falls, and takes two empires and China down with them.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ybOKAzIVp70.mp4/ybOKAzIVp70.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ybOKAzIVp70.mp4/ybOKAzIVp70.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ybOKAzIVp70.m3u8/ybOKAzIVp70.m3u8"}, "slug": "crash-course-world-history-25", "video_id": "ybOKAzIVp70", "youtube_id": "ybOKAzIVp70", "readable_id": "crash-course-world-history-25"}, "qFFhdLlX220": {"duration": 256, "path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/simplifying-square-roots-comment-response/", "keywords": "algebra, worked, examples", "id": "qFFhdLlX220", "title": "How to simplify a variable square root expression (example)", "description": "Sal shows how to simplify 3\u221a(500x^3).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qFFhdLlX220.mp4/qFFhdLlX220.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qFFhdLlX220.mp4/qFFhdLlX220.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qFFhdLlX220.m3u8/qFFhdLlX220.m3u8"}, "slug": "simplifying-square-roots-comment-response", "video_id": "qFFhdLlX220", "youtube_id": "qFFhdLlX220", "readable_id": "simplifying-square-roots-comment-response"}, "Nk4DmlnoLxw": {"duration": 313, "path": "khan/humanities/becoming-modern/symbolism/fernand-khnopff-i-lock-my-door-upon-myself-1891/", "keywords": "", "id": "Nk4DmlnoLxw", "title": "Khnopff, I Lock My Door Upon Myself", "description": "Fernand Khnopff, I Lock My Door Upon Myself, 1891 (Neue Pinakothek, Munich) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Nk4DmlnoLxw.mp4/Nk4DmlnoLxw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Nk4DmlnoLxw.mp4/Nk4DmlnoLxw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Nk4DmlnoLxw.m3u8/Nk4DmlnoLxw.m3u8"}, "slug": "fernand-khnopff-i-lock-my-door-upon-myself-1891", "video_id": "Nk4DmlnoLxw", "youtube_id": "Nk4DmlnoLxw", "readable_id": "fernand-khnopff-i-lock-my-door-upon-myself-1891"}, "N3jnRuzseoM": {"duration": 492, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/diabetes-in-pregnancy/", "keywords": "", "id": "N3jnRuzseoM", "title": "Diabetes in pregnancy", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N3jnRuzseoM.mp4/N3jnRuzseoM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N3jnRuzseoM.mp4/N3jnRuzseoM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N3jnRuzseoM.m3u8/N3jnRuzseoM.m3u8"}, "slug": "diabetes-in-pregnancy", "video_id": "N3jnRuzseoM", "youtube_id": "N3jnRuzseoM", "readable_id": "diabetes-in-pregnancy"}, "0C2Ucb69eOM": {"duration": 226, "path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/room-turner/", "keywords": "Tate, Turner, ", "id": "0C2Ucb69eOM", "title": "Room: JMW Turner", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator David Brown explores the work of JMW Turner. Check out\u00a0Turner Online for an in-depth look at the artist's life and work.\n\nLearn more about the art featured in this video:\n- JMW Turner, The Shipwreck, exhibited 1805\n- JMW Turner,\u00a0Ancient Rome; Agrippina Landing with the Ashes of Germanicus, exhibited 1839", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0C2Ucb69eOM.mp4/0C2Ucb69eOM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0C2Ucb69eOM.mp4/0C2Ucb69eOM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0C2Ucb69eOM.m3u8/0C2Ucb69eOM.m3u8"}, "slug": "room-turner", "video_id": "0C2Ucb69eOM", "youtube_id": "0C2Ucb69eOM", "readable_id": "room-turner"}, "rhuYuerbhIE": {"duration": 671, "path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/oxidation-states-of-carbon/", "keywords": "", "id": "rhuYuerbhIE", "title": "Oxidation states of carbon", "description": "How to assign oxidation states to carbon in different compounds", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rhuYuerbhIE.mp4/rhuYuerbhIE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rhuYuerbhIE.mp4/rhuYuerbhIE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rhuYuerbhIE.m3u8/rhuYuerbhIE.m3u8"}, "slug": "oxidation-states-of-carbon", "video_id": "rhuYuerbhIE", "youtube_id": "rhuYuerbhIE", "readable_id": "oxidation-states-of-carbon"}, "zrqzG6xKa1A": {"duration": 544, "path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/angles-part-2/", "keywords": "geometry, angles, opposite, complementary, supplementary, math, CC_4_MD_5, CC_4_MD_5_a, CC_4_MD_5_b, CC_7_G_5", "id": "zrqzG6xKa1A", "title": "Angles (part 2)", "description": "More on complementary and supplementary angles. Introduction to opposite angles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zrqzG6xKa1A.mp4/zrqzG6xKa1A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zrqzG6xKa1A.mp4/zrqzG6xKa1A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zrqzG6xKa1A.m3u8/zrqzG6xKa1A.m3u8"}, "slug": "angles-part-2", "video_id": "zrqzG6xKa1A", "youtube_id": "zrqzG6xKa1A", "readable_id": "angles-part-2"}, "JbWGusfynCw": {"duration": 219, "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/michelangelo-piet-1498-1500/", "keywords": "art, arthistory, smarthistory, rome, michelangelo, pieta, vatican, St. Peters Basilica", "id": "JbWGusfynCw", "title": "Michelangelo, Piet\u00e0", "description": "Michelangelo, Piet\u00e0, marble, 1498-1500 (Saint Peter's Basilica, Rome) Speakers: Dr. Beth Harris and Dr. Steven Zucker.\n\nThe\u00a0Piet\u00e0\u00a0was a popular subject among northern european artists. It means Pity or Compassion, and represents Mary sorrowfully contemplating the dead body of her son which she holds on her lap. This sculpture was commissioned by a French Cardinal living in Rome.\nLook closely and see how Michelangelo made marble seem like flesh, and look at those complicated folds of drapery. It is important here to remember how sculpture is made. It was a messy, rather loud process (which is one of the reasons that Leonardo claimed that painting was superior to sculpture!). Just like painters often mixed their own paint, Michelangelo forged many of his own tools, and often participated in the quarrying of his marble -- a dangerous job.\n\nWhen we look at the extraordinary representation of the human body here we remember that Michelangelo, like Leonardo before him, had dissected cadavers to understand how the body worked.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JbWGusfynCw.mp4/JbWGusfynCw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JbWGusfynCw.mp4/JbWGusfynCw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JbWGusfynCw.m3u8/JbWGusfynCw.m3u8"}, "slug": "michelangelo-piet-1498-1500", "video_id": "JbWGusfynCw", "youtube_id": "JbWGusfynCw", "readable_id": "michelangelo-piet-1498-1500"}, "hMzFbORRiss": {"duration": 300, "path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/masaccio-expulsion-of-adam-and-eve-from-eden-brancacci-chapel-c-1424-1427/", "keywords": "smarthistory, art history, khan academy, florence, renaissance, masaccio, early renaissance, santa maria del carmine, brancacci chapel", "id": "hMzFbORRiss", "title": "Masaccio, Expulsion of Adam and Eve from Eden", "description": "Masaccio, Expulsion of Adam and Eve from Eden, Brancacci Chapel, Santa Maria del Carmine, Florence, Italy, ca. 1424--1427. Fresco, 7' x 2' 11\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hMzFbORRiss.mp4/hMzFbORRiss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hMzFbORRiss.mp4/hMzFbORRiss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hMzFbORRiss.m3u8/hMzFbORRiss.m3u8"}, "slug": "masaccio-expulsion-of-adam-and-eve-from-eden-brancacci-chapel-c-1424-1427", "video_id": "hMzFbORRiss", "youtube_id": "hMzFbORRiss", "readable_id": "masaccio-expulsion-of-adam-and-eve-from-eden-brancacci-chapel-c-1424-1427"}, "SCBp0d6zR2I": {"duration": 217, "path": "khan/math/early-math/cc-early-math-add-sub-1000/cc-early-math-add-ones-tens-hundreds/adding-hundreds-tens-and-ones/", "keywords": "", "id": "SCBp0d6zR2I", "title": "Adding hundreds, tens, and ones", "description": "Learn how to add three-digit numbers by adding ones, tens, and hundreds.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SCBp0d6zR2I.mp4/SCBp0d6zR2I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SCBp0d6zR2I.mp4/SCBp0d6zR2I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SCBp0d6zR2I.m3u8/SCBp0d6zR2I.m3u8"}, "slug": "adding-hundreds-tens-and-ones", "video_id": "SCBp0d6zR2I", "youtube_id": "SCBp0d6zR2I", "readable_id": "adding-hundreds-tens-and-ones"}, "h0207xMD6b8": {"duration": 304, "path": "khan/science/health-and-medicine/healthcare-misc/thrombo-emboli-and-thromboembolisms/", "keywords": "thrombosis, embolism", "id": "h0207xMD6b8", "title": "Thrombo-emboli and thromboembolisms", "description": "Clarifying difference between a thrombus and an embolus (and between thrombosis and embolism)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h0207xMD6b8.mp4/h0207xMD6b8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h0207xMD6b8.mp4/h0207xMD6b8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h0207xMD6b8.m3u8/h0207xMD6b8.m3u8"}, "slug": "thrombo-emboli-and-thromboembolisms", "video_id": "h0207xMD6b8", "youtube_id": "h0207xMD6b8", "readable_id": "thrombo-emboli-and-thromboembolisms"}, "bAerID24QJ0": {"duration": 447, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/old-school-equations/algebra-linear-equations-1/", "keywords": "algebra", "id": "bAerID24QJ0", "title": "Algebra: Linear equations 1", "description": "equations of the form AX=B", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bAerID24QJ0.mp4/bAerID24QJ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bAerID24QJ0.mp4/bAerID24QJ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bAerID24QJ0.m3u8/bAerID24QJ0.m3u8"}, "slug": "algebra-linear-equations-1", "video_id": "bAerID24QJ0", "youtube_id": "bAerID24QJ0", "readable_id": "algebra-linear-equations-1"}, "7m0u6dxA5Xo": {"duration": 769, "path": "khan/test-prep/mcat/physical-processes/spherical-mirrors/parabolic-mirrors-2/", "keywords": "Parabolic, Mirrors, real, image, optics", "id": "7m0u6dxA5Xo", "title": "Parabolic mirrors 2", "description": "Parabolic Mirrors 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7m0u6dxA5Xo.mp4/7m0u6dxA5Xo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7m0u6dxA5Xo.mp4/7m0u6dxA5Xo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7m0u6dxA5Xo.m3u8/7m0u6dxA5Xo.m3u8"}, "slug": "parabolic-mirrors-2", "video_id": "7m0u6dxA5Xo", "youtube_id": "7m0u6dxA5Xo", "readable_id": "parabolic-mirrors-2"}, "KrkbbRxdDZ8": {"duration": 353, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/consumer-producer-surplus-tut/demand-curve-as-marginal-benefit-curve/", "keywords": "economics, micro, supply, demand", "id": "KrkbbRxdDZ8", "title": "Demand curve as marginal benefit curve", "description": "Thinking about a demand curve in terms of quantity driving price", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KrkbbRxdDZ8.mp4/KrkbbRxdDZ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KrkbbRxdDZ8.mp4/KrkbbRxdDZ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KrkbbRxdDZ8.m3u8/KrkbbRxdDZ8.m3u8"}, "slug": "demand-curve-as-marginal-benefit-curve", "video_id": "KrkbbRxdDZ8", "youtube_id": "KrkbbRxdDZ8", "readable_id": "demand-curve-as-marginal-benefit-curve"}, "lHdlHTsXbZg": {"duration": 452, "path": "khan/math/algebra2/functions-and-graphs/undefined_indeterminate/undefined-and-indeterminate/", "keywords": "undefined, indeterminate", "id": "lHdlHTsXbZg", "title": "Undefined and indeterminate", "description": "Why 0/0 is considered to be indeterminate", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lHdlHTsXbZg.mp4/lHdlHTsXbZg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lHdlHTsXbZg.mp4/lHdlHTsXbZg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lHdlHTsXbZg.m3u8/lHdlHTsXbZg.m3u8"}, "slug": "undefined-and-indeterminate", "video_id": "lHdlHTsXbZg", "youtube_id": "lHdlHTsXbZg", "readable_id": "undefined-and-indeterminate"}, "xMsG9hvqzbY": {"duration": 568, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/complicated_equations/equations-with-variables-on-both-sides/", "keywords": "Variables, On, Both, Sides, equations, CC_39336_A-REI_3", "id": "xMsG9hvqzbY", "title": "Ex 3: Distributive property to simplify", "description": "The power of the distributive property allows us to solve these examples equations (and a word problem).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xMsG9hvqzbY.mp4/xMsG9hvqzbY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xMsG9hvqzbY.mp4/xMsG9hvqzbY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xMsG9hvqzbY.m3u8/xMsG9hvqzbY.m3u8"}, "slug": "equations-with-variables-on-both-sides", "video_id": "xMsG9hvqzbY", "youtube_id": "xMsG9hvqzbY", "readable_id": "equations-with-variables-on-both-sides"}, "IHEPNJJlGT4": {"duration": 218, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/6-sea-islands/", "keywords": "", "id": "IHEPNJJlGT4", "title": "6 Sea Islands", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IHEPNJJlGT4.mp4/IHEPNJJlGT4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IHEPNJJlGT4.mp4/IHEPNJJlGT4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IHEPNJJlGT4.m3u8/IHEPNJJlGT4.m3u8"}, "slug": "6-sea-islands", "video_id": "IHEPNJJlGT4", "youtube_id": "IHEPNJJlGT4", "readable_id": "6-sea-islands"}, "amMkXQ1s2ns": {"duration": 931, "path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-leading-change/sscc-blended-innovationprocess/", "keywords": "", "id": "amMkXQ1s2ns", "title": "Driving the process of innovation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/amMkXQ1s2ns.mp4/amMkXQ1s2ns.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/amMkXQ1s2ns.mp4/amMkXQ1s2ns.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/amMkXQ1s2ns.m3u8/amMkXQ1s2ns.m3u8"}, "slug": "sscc-blended-innovationprocess", "video_id": "amMkXQ1s2ns", "youtube_id": "amMkXQ1s2ns", "readable_id": "sscc-blended-innovationprocess"}, "cRboY08YG8g": {"duration": 540, "path": "khan/math/differential-calculus/derivative_applications/calc_optimization/optimizing-box-volume-analytically/", "keywords": "", "id": "cRboY08YG8g", "title": "Optimizing box volume analytically", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cRboY08YG8g.mp4/cRboY08YG8g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cRboY08YG8g.mp4/cRboY08YG8g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cRboY08YG8g.m3u8/cRboY08YG8g.m3u8"}, "slug": "optimizing-box-volume-analytically", "video_id": "cRboY08YG8g", "youtube_id": "cRboY08YG8g", "readable_id": "optimizing-box-volume-analytically"}, "aNkrawaaiZQ": {"duration": 559, "path": "khan/humanities/history/euro-hist/cold-war/pattern-of-us-cold-war-interventions/", "keywords": "cold, war", "id": "aNkrawaaiZQ", "title": "Pattern of US Cold War interventions", "description": "Comparing the patterns of Korea, Cuba and Vietnam", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aNkrawaaiZQ.mp4/aNkrawaaiZQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aNkrawaaiZQ.mp4/aNkrawaaiZQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aNkrawaaiZQ.m3u8/aNkrawaaiZQ.m3u8"}, "slug": "pattern-of-us-cold-war-interventions", "video_id": "aNkrawaaiZQ", "youtube_id": "aNkrawaaiZQ", "readable_id": "pattern-of-us-cold-war-interventions"}, "9SOSfRNCQZQ": {"duration": 332, "path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/graphing-exponential-functions/", "keywords": "u18_l1_t1_we1, Graphing, Exponential, Functions", "id": "9SOSfRNCQZQ", "title": "How to graph a basic exponential function given its formula (example)", "description": "Sal shows how to graph y=5^x, including a discussion of the end behavior of the function.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9SOSfRNCQZQ.mp4/9SOSfRNCQZQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9SOSfRNCQZQ.mp4/9SOSfRNCQZQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9SOSfRNCQZQ.m3u8/9SOSfRNCQZQ.m3u8"}, "slug": "graphing-exponential-functions", "video_id": "9SOSfRNCQZQ", "youtube_id": "9SOSfRNCQZQ", "readable_id": "graphing-exponential-functions"}, "Qw37BqzvEvw": {"duration": 487, "path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/how-does-substance-use-develop-into-substance-abuse/", "keywords": "Substance Abuse (Disease Or Medical Condition),Health (Industry)", "id": "Qw37BqzvEvw", "title": "How does substance use develop into substance abuse", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qw37BqzvEvw.mp4/Qw37BqzvEvw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qw37BqzvEvw.mp4/Qw37BqzvEvw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qw37BqzvEvw.m3u8/Qw37BqzvEvw.m3u8"}, "slug": "how-does-substance-use-develop-into-substance-abuse", "video_id": "Qw37BqzvEvw", "youtube_id": "Qw37BqzvEvw", "readable_id": "how-does-substance-use-develop-into-substance-abuse"}, "1TK8V_qmqrk": {"duration": 455, "path": "khan/math/differential-calculus/derivative_applications/calc_optimization/minimizing-sum-of-squares/", "keywords": "", "id": "1TK8V_qmqrk", "title": "Minimizing sum of squares", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1TK8V_qmqrk.mp4/1TK8V_qmqrk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1TK8V_qmqrk.mp4/1TK8V_qmqrk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1TK8V_qmqrk.m3u8/1TK8V_qmqrk.m3u8"}, "slug": "minimizing-sum-of-squares", "video_id": "1TK8V_qmqrk", "youtube_id": "1TK8V_qmqrk", "readable_id": "minimizing-sum-of-squares"}, "q--2WP8wXtk": {"duration": 580, "path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/atomic-radius-trend/", "keywords": "", "id": "q--2WP8wXtk", "title": "Atomic radius trends on periodic table", "description": "How atomic radius is defined, and trends across a period and down a group.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q--2WP8wXtk.mp4/q--2WP8wXtk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q--2WP8wXtk.mp4/q--2WP8wXtk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q--2WP8wXtk.m3u8/q--2WP8wXtk.m3u8"}, "slug": "atomic-radius-trend", "video_id": "q--2WP8wXtk", "youtube_id": "q--2WP8wXtk", "readable_id": "atomic-radius-trend"}, "NaO01BO8X70": {"duration": 165, "path": "khan/math/recreational-math/math-warmup/random-sample-warmup/random-sample-warmup1/", "keywords": "", "id": "NaO01BO8X70", "title": "Introduction to random sampling", "description": "Can Sal predict the ratio of white to black balls without looking at all of them?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NaO01BO8X70.mp4/NaO01BO8X70.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NaO01BO8X70.mp4/NaO01BO8X70.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NaO01BO8X70.m3u8/NaO01BO8X70.m3u8"}, "slug": "random-sample-warmup1", "video_id": "NaO01BO8X70", "youtube_id": "NaO01BO8X70", "readable_id": "random-sample-warmup1"}, "MYkR32QOdg0": {"duration": 157, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/life-insurance/term-and-whole-life-insurance-policies-2/", "keywords": "life, insurance", "id": "MYkR32QOdg0", "title": "Term and whole life insurance policies 2", "description": "What happens to the cash payout in a whole life policy when someone dies?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MYkR32QOdg0.mp4/MYkR32QOdg0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MYkR32QOdg0.mp4/MYkR32QOdg0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MYkR32QOdg0.m3u8/MYkR32QOdg0.m3u8"}, "slug": "term-and-whole-life-insurance-policies-2", "video_id": "MYkR32QOdg0", "youtube_id": "MYkR32QOdg0", "readable_id": "term-and-whole-life-insurance-policies-2"}, "91qVGeyTl44": {"duration": 348, "path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/alternating-series-test/", "keywords": "", "id": "91qVGeyTl44", "title": "Alternating series test", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/91qVGeyTl44.mp4/91qVGeyTl44.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/91qVGeyTl44.mp4/91qVGeyTl44.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/91qVGeyTl44.m3u8/91qVGeyTl44.m3u8"}, "slug": "alternating-series-test", "video_id": "91qVGeyTl44", "youtube_id": "91qVGeyTl44", "readable_id": "alternating-series-test"}, "PZIoFD_Z73M": {"duration": 618, "path": "khan/science/chemistry/electronic-structure-of-atoms/orbitals-and-electrons/heisenberg-uncertainty-principle/", "keywords": "", "id": "PZIoFD_Z73M", "title": "Heisenberg uncertainty principle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PZIoFD_Z73M.mp4/PZIoFD_Z73M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PZIoFD_Z73M.mp4/PZIoFD_Z73M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PZIoFD_Z73M.m3u8/PZIoFD_Z73M.m3u8"}, "slug": "heisenberg-uncertainty-principle", "video_id": "PZIoFD_Z73M", "youtube_id": "PZIoFD_Z73M", "readable_id": "heisenberg-uncertainty-principle"}, "jmbg-DKWuc4": {"duration": 143, "path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-to-produce-difference-of-squares/", "keywords": "", "id": "jmbg-DKWuc4", "title": "How to factor a difference of squares with leading coefficient other than 1 (example)", "description": "Sal factors 45x^2-125 as 5(3x+5)(3x-5).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jmbg-DKWuc4.mp4/jmbg-DKWuc4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jmbg-DKWuc4.mp4/jmbg-DKWuc4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jmbg-DKWuc4.m3u8/jmbg-DKWuc4.m3u8"}, "slug": "factoring-to-produce-difference-of-squares", "video_id": "jmbg-DKWuc4", "youtube_id": "jmbg-DKWuc4", "readable_id": "factoring-to-produce-difference-of-squares"}, "kVJTlv0A3RM": {"duration": 62, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/indicating-electrolysis/electrolysis-teacher-tips-hd-720p/", "keywords": "", "id": "kVJTlv0A3RM", "title": "Experiment tips", "description": "Here are a few tips from Julie to help you conduct your Indicating Electrolysis experiment.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kVJTlv0A3RM.mp4/kVJTlv0A3RM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kVJTlv0A3RM.mp4/kVJTlv0A3RM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kVJTlv0A3RM.m3u8/kVJTlv0A3RM.m3u8"}, "slug": "electrolysis-teacher-tips-hd-720p", "video_id": "kVJTlv0A3RM", "youtube_id": "kVJTlv0A3RM", "readable_id": "electrolysis-teacher-tips-hd-720p"}, "wU9_daCwr_w": {"duration": 334, "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/esophagus/", "keywords": "MCAT", "id": "wU9_daCwr_w", "title": "Esophagus", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wU9_daCwr_w.mp4/wU9_daCwr_w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wU9_daCwr_w.mp4/wU9_daCwr_w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wU9_daCwr_w.m3u8/wU9_daCwr_w.m3u8"}, "slug": "esophagus", "video_id": "wU9_daCwr_w", "youtube_id": "wU9_daCwr_w", "readable_id": "esophagus"}, "haidlj3cTAA": {"duration": 401, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/lesion-studies-and-experimental-ablation/", "keywords": "", "id": "haidlj3cTAA", "title": "Lesion studies and experimental ablation", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/haidlj3cTAA.mp4/haidlj3cTAA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/haidlj3cTAA.mp4/haidlj3cTAA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/haidlj3cTAA.m3u8/haidlj3cTAA.m3u8"}, "slug": "lesion-studies-and-experimental-ablation", "video_id": "haidlj3cTAA", "youtube_id": "haidlj3cTAA", "readable_id": "lesion-studies-and-experimental-ablation"}, "qs0hRHfnzTQ": {"duration": 568, "path": "khan/math/multivariable-calculus/line_integrals_topic/2d_divergence_theorem/conceptual-clarification-for-2-d-divergence-theorem/", "keywords": "vector, calculus", "id": "qs0hRHfnzTQ", "title": "Conceptual clarification for 2D divergence theorem", "description": "Understanding the line integral as flux through a boundary", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qs0hRHfnzTQ.mp4/qs0hRHfnzTQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qs0hRHfnzTQ.mp4/qs0hRHfnzTQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qs0hRHfnzTQ.m3u8/qs0hRHfnzTQ.m3u8"}, "slug": "conceptual-clarification-for-2-d-divergence-theorem", "video_id": "qs0hRHfnzTQ", "youtube_id": "qs0hRHfnzTQ", "readable_id": "conceptual-clarification-for-2-d-divergence-theorem"}, "PWiWkqHmum0": {"duration": 485, "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/population-standard-deviation/", "keywords": "", "id": "PWiWkqHmum0", "title": "Population standard deviation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PWiWkqHmum0.mp4/PWiWkqHmum0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PWiWkqHmum0.mp4/PWiWkqHmum0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PWiWkqHmum0.m3u8/PWiWkqHmum0.m3u8"}, "slug": "population-standard-deviation", "video_id": "PWiWkqHmum0", "youtube_id": "PWiWkqHmum0", "readable_id": "population-standard-deviation"}, "c547u94QRFU": {"duration": 646, "path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/meta-directors-i/", "keywords": "", "id": "c547u94QRFU", "title": "Meta directors I", "description": "Regiochemistry", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/c547u94QRFU.mp4/c547u94QRFU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/c547u94QRFU.mp4/c547u94QRFU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/c547u94QRFU.m3u8/c547u94QRFU.m3u8"}, "slug": "meta-directors-i", "video_id": "c547u94QRFU", "youtube_id": "c547u94QRFU", "readable_id": "meta-directors-i"}, "itoNb1lb5hY": {"duration": 724, "path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/currency-exchange-introduction/", "keywords": "Currency, Introduction, Exchange, Yuan, Renminbi", "id": "itoNb1lb5hY", "title": "Currency exchange introduction", "description": "Introduction to how exchange rates can fluctuate", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/itoNb1lb5hY.mp4/itoNb1lb5hY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/itoNb1lb5hY.mp4/itoNb1lb5hY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/itoNb1lb5hY.m3u8/itoNb1lb5hY.m3u8"}, "slug": "currency-exchange-introduction", "video_id": "itoNb1lb5hY", "youtube_id": "itoNb1lb5hY", "readable_id": "currency-exchange-introduction"}, "McINBOFCGH8": {"duration": 342, "path": "khan/math/geometry/right_triangles_topic/special_right_triangles/45-45-90-triangle-side-ratios/", "keywords": "45, 90, Triangle, Side, Ratios", "id": "McINBOFCGH8", "title": "45-45-90 triangle side ratios", "description": "Showing the ratios of the sides of a 45-45-90 triangle are 1:1:sqrt(2)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/McINBOFCGH8.mp4/McINBOFCGH8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/McINBOFCGH8.mp4/McINBOFCGH8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/McINBOFCGH8.m3u8/McINBOFCGH8.m3u8"}, "slug": "45-45-90-triangle-side-ratios", "video_id": "McINBOFCGH8", "youtube_id": "McINBOFCGH8", "readable_id": "45-45-90-triangle-side-ratios"}, "QVxqgxVtKbs": {"duration": 337, "path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/area-of-shaded-region-made-from-equilateral-triangles/", "keywords": "", "id": "QVxqgxVtKbs", "title": "Area of shaded region made from equilateral triangles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QVxqgxVtKbs.mp4/QVxqgxVtKbs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QVxqgxVtKbs.mp4/QVxqgxVtKbs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QVxqgxVtKbs.m3u8/QVxqgxVtKbs.m3u8"}, "slug": "area-of-shaded-region-made-from-equilateral-triangles", "video_id": "QVxqgxVtKbs", "youtube_id": "QVxqgxVtKbs", "readable_id": "area-of-shaded-region-made-from-equilateral-triangles"}, "y2RHWA7t0WM": {"duration": 310, "path": "khan/math/pre-algebra/rates-and-ratios/metric-system-tutorial/u-s-customary-and-metric-units/", "keywords": "U06_L2_T1_we1, U.S., Customary, and, Metric, units, CC_3_MD_2", "id": "y2RHWA7t0WM", "title": "U.S. customary and metric units", "description": "U.S. Customary and Metric units", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y2RHWA7t0WM.mp4/y2RHWA7t0WM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y2RHWA7t0WM.mp4/y2RHWA7t0WM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y2RHWA7t0WM.m3u8/y2RHWA7t0WM.m3u8"}, "slug": "u-s-customary-and-metric-units", "video_id": "y2RHWA7t0WM", "youtube_id": "y2RHWA7t0WM", "readable_id": "u-s-customary-and-metric-units"}, "H6RXlL7keGw": {"duration": 144, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-1/", "keywords": "", "id": "H6RXlL7keGw", "title": "1 12th term in sequence", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H6RXlL7keGw.mp4/H6RXlL7keGw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H6RXlL7keGw.mp4/H6RXlL7keGw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H6RXlL7keGw.m3u8/H6RXlL7keGw.m3u8"}, "slug": "2013-sat-practice-6-1", "video_id": "H6RXlL7keGw", "youtube_id": "H6RXlL7keGw", "readable_id": "2013-sat-practice-6-1"}, "tOEz6RC0aVo": {"duration": 476, "path": "khan/test-prep/mcat/behavior/normative-and-non-normative-behavior/what-is-normal/", "keywords": "", "id": "tOEz6RC0aVo", "title": "What is normal? Exploring folkways, mores, and taboos", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tOEz6RC0aVo.mp4/tOEz6RC0aVo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tOEz6RC0aVo.mp4/tOEz6RC0aVo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tOEz6RC0aVo.m3u8/tOEz6RC0aVo.m3u8"}, "slug": "what-is-normal", "video_id": "tOEz6RC0aVo", "youtube_id": "tOEz6RC0aVo", "readable_id": "what-is-normal"}, "0DBDuNYsciY": {"duration": 196, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/writing-series-sigma-notation/", "keywords": "", "id": "0DBDuNYsciY", "title": "Writing a series in sigma notation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0DBDuNYsciY.mp4/0DBDuNYsciY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0DBDuNYsciY.mp4/0DBDuNYsciY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0DBDuNYsciY.m3u8/0DBDuNYsciY.m3u8"}, "slug": "writing-series-sigma-notation", "video_id": "0DBDuNYsciY", "youtube_id": "0DBDuNYsciY", "readable_id": "writing-series-sigma-notation"}, "uuDQkhx6TAI": {"duration": 632, "path": "khan/math/geometry/transformations/hs-geo-rotations/rotating-about-arbitrary-point/", "keywords": "", "id": "uuDQkhx6TAI", "title": "How the draw the image of a rotation about an arbitrary point (example)", "description": "Sal is given a triangle on the coordinate plane and the definition of a rotation about an arbitrary point, and he manually draws the image of that rotation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uuDQkhx6TAI.mp4/uuDQkhx6TAI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uuDQkhx6TAI.mp4/uuDQkhx6TAI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uuDQkhx6TAI.m3u8/uuDQkhx6TAI.m3u8"}, "slug": "rotating-about-arbitrary-point", "video_id": "uuDQkhx6TAI", "youtube_id": "uuDQkhx6TAI", "readable_id": "rotating-about-arbitrary-point"}, "t6npEWNrHGM": {"duration": 146, "path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/hadrian-imperial-palace/", "keywords": "Hadrian, Ancient Rome,", "id": "t6npEWNrHGM", "title": "Hadrian, The imperial palace, Tivoli", "description": "Hadrian built himself a vast palace in the countryside, the villa Adriana in Tivoli about 30 kilometres east of Rome. It was a huge complex, designed to accommodate thousands of people. It was his administrative capital and represents his empire in miniature. British Museum Director Neil MacGregor visits. \u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/t6npEWNrHGM.mp4/t6npEWNrHGM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/t6npEWNrHGM.mp4/t6npEWNrHGM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/t6npEWNrHGM.m3u8/t6npEWNrHGM.m3u8"}, "slug": "hadrian-imperial-palace", "video_id": "t6npEWNrHGM", "youtube_id": "t6npEWNrHGM", "readable_id": "hadrian-imperial-palace"}, "dgZy7Uj8cAI": {"duration": 673, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-12/", "keywords": "GMAT, data, sufficiency, math", "id": "dgZy7Uj8cAI", "title": "GMAT: Data sufficiency 12", "description": "55-58, pg. 282", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dgZy7Uj8cAI.mp4/dgZy7Uj8cAI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dgZy7Uj8cAI.mp4/dgZy7Uj8cAI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dgZy7Uj8cAI.m3u8/dgZy7Uj8cAI.m3u8"}, "slug": "gmat-data-sufficiency-12", "video_id": "dgZy7Uj8cAI", "youtube_id": "dgZy7Uj8cAI", "readable_id": "gmat-data-sufficiency-12"}, "cdY0b4ziR5U": {"duration": 88, "path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/systems-of-nonlinear-equations-1/", "keywords": "", "id": "cdY0b4ziR5U", "title": "Systems of nonlinear equations 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cdY0b4ziR5U.mp4/cdY0b4ziR5U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cdY0b4ziR5U.mp4/cdY0b4ziR5U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cdY0b4ziR5U.m3u8/cdY0b4ziR5U.m3u8"}, "slug": "systems-of-nonlinear-equations-1", "video_id": "cdY0b4ziR5U", "youtube_id": "cdY0b4ziR5U", "readable_id": "systems-of-nonlinear-equations-1"}, "bh1UrCGWz1k": {"duration": 288, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/infinite-series-as-limit-of-partial-sums/", "keywords": "", "id": "bh1UrCGWz1k", "title": "Infinite series as limit of partial sums", "description": "Infinite series as limit of partial sums", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bh1UrCGWz1k.mp4/bh1UrCGWz1k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bh1UrCGWz1k.mp4/bh1UrCGWz1k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bh1UrCGWz1k.m3u8/bh1UrCGWz1k.m3u8"}, "slug": "infinite-series-as-limit-of-partial-sums", "video_id": "bh1UrCGWz1k", "youtube_id": "bh1UrCGWz1k", "readable_id": "infinite-series-as-limit-of-partial-sums"}, "jkmwAJMERrY": {"duration": 501, "path": "khan/economics-finance-domain/core-finance/money-and-banking/greek-debt-crisis/how-and-why-greece-would-leave-the-euro-part-3/", "keywords": "euro, greece, financial, crisis", "id": "jkmwAJMERrY", "title": "How and why Greece would leave the Euro (part 3)", "description": "The pain and mechanics of leaving the Euro", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jkmwAJMERrY.mp4/jkmwAJMERrY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jkmwAJMERrY.mp4/jkmwAJMERrY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jkmwAJMERrY.m3u8/jkmwAJMERrY.m3u8"}, "slug": "how-and-why-greece-would-leave-the-euro-part-3", "video_id": "jkmwAJMERrY", "youtube_id": "jkmwAJMERrY", "readable_id": "how-and-why-greece-would-leave-the-euro-part-3"}, "04N79tItPEA": {"duration": 121, "path": "khan/math/geometry/basic-geometry/circum_area_circles/parts-of-a-circle/", "keywords": "u07_l2_t3_we1, Parts, of, Circle", "id": "04N79tItPEA", "title": "Labeling parts of a circle", "description": "Radius, diameter, center, and circumference--all are parts of a circle. Let's go through each and understand how they are defined.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/04N79tItPEA.mp4/04N79tItPEA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/04N79tItPEA.mp4/04N79tItPEA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/04N79tItPEA.m3u8/04N79tItPEA.m3u8"}, "slug": "parts-of-a-circle", "video_id": "04N79tItPEA", "youtube_id": "04N79tItPEA", "readable_id": "parts-of-a-circle"}, "CafRuKs7EfE": {"duration": 714, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/preparation-of-amides-using-dcc/", "keywords": "", "id": "CafRuKs7EfE", "title": "Preparation of amides using DCC", "description": "The mechanism for the formation of amides from carboxylic acids and amines using dicyclohexylcarbodiimide (DCC)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CafRuKs7EfE.mp4/CafRuKs7EfE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CafRuKs7EfE.mp4/CafRuKs7EfE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CafRuKs7EfE.m3u8/CafRuKs7EfE.m3u8"}, "slug": "preparation-of-amides-using-dcc", "video_id": "CafRuKs7EfE", "youtube_id": "CafRuKs7EfE", "readable_id": "preparation-of-amides-using-dcc"}, "VTdV9JaHiIA": {"duration": 420, "path": "khan/humanities/history/euro-hist/hitler-nazis/nazi-aggression-and-appeasement/", "keywords": "", "id": "VTdV9JaHiIA", "title": "Nazi aggression and appeasement", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VTdV9JaHiIA.mp4/VTdV9JaHiIA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VTdV9JaHiIA.mp4/VTdV9JaHiIA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VTdV9JaHiIA.m3u8/VTdV9JaHiIA.m3u8"}, "slug": "nazi-aggression-and-appeasement", "video_id": "VTdV9JaHiIA", "youtube_id": "VTdV9JaHiIA", "readable_id": "nazi-aggression-and-appeasement"}, "P1Lw1NVcI8o": {"duration": 215, "path": "khan/humanities/becoming-modern/symbolism/gustav-klimt-death-and-life-1910/", "keywords": "Klimt, death, life, GAP, Google Art Project, Smarthistory, Khan Academy, Art History, Vienna, Secession, Art Nouveau, Allegory, Gustav Klimt, Death and Life, 1910, 1915", "id": "P1Lw1NVcI8o", "title": "Klimt, Death and Life", "description": "Gustav Klimt, Death and Life, 1910, reworked 1915, oil on canvas, 178 x 198 cm (Leopold Museum, Vienna)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P1Lw1NVcI8o.mp4/P1Lw1NVcI8o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P1Lw1NVcI8o.mp4/P1Lw1NVcI8o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P1Lw1NVcI8o.m3u8/P1Lw1NVcI8o.m3u8"}, "slug": "gustav-klimt-death-and-life-1910", "video_id": "P1Lw1NVcI8o", "youtube_id": "P1Lw1NVcI8o", "readable_id": "gustav-klimt-death-and-life-1910"}, "h8EYEJ32oQ8": {"duration": 534, "path": "khan/math/probability/descriptive-statistics/central_tendency/statistics-intro-mean-median-and-mode/", "keywords": "mean, median, mode", "id": "h8EYEJ32oQ8", "title": "Statistics intro: Mean, median, and mode", "description": "This is a fantastic intro to the basics of statistics. Our focus here is to help you understand the core concepts of arithmetic mean, median, and mode.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h8EYEJ32oQ8.mp4/h8EYEJ32oQ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h8EYEJ32oQ8.mp4/h8EYEJ32oQ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h8EYEJ32oQ8.m3u8/h8EYEJ32oQ8.m3u8"}, "slug": "statistics-intro-mean-median-and-mode", "video_id": "h8EYEJ32oQ8", "youtube_id": "h8EYEJ32oQ8", "readable_id": "statistics-intro-mean-median-and-mode"}, "qBfc57x_RSg": {"duration": 1398, "path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/linear-algebra-rowspace-and-left-nullspace/", "keywords": "rowspace, left, nullspace", "id": "qBfc57x_RSg", "title": "Rowspace and left nullspace", "description": "Rowspace and Left Nullspace", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qBfc57x_RSg.mp4/qBfc57x_RSg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qBfc57x_RSg.mp4/qBfc57x_RSg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qBfc57x_RSg.m3u8/qBfc57x_RSg.m3u8"}, "slug": "linear-algebra-rowspace-and-left-nullspace", "video_id": "qBfc57x_RSg", "youtube_id": "qBfc57x_RSg", "readable_id": "linear-algebra-rowspace-and-left-nullspace"}, "UXQGzgPf1LE": {"duration": 352, "path": "khan/math/differential-calculus/taking-derivatives/product_rule/using-the-product-rule-and-the-chain-rule/", "keywords": "", "id": "UXQGzgPf1LE", "title": "Using the product rule and the chain rule", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UXQGzgPf1LE.mp4/UXQGzgPf1LE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UXQGzgPf1LE.mp4/UXQGzgPf1LE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UXQGzgPf1LE.m3u8/UXQGzgPf1LE.m3u8"}, "slug": "using-the-product-rule-and-the-chain-rule", "video_id": "UXQGzgPf1LE", "youtube_id": "UXQGzgPf1LE", "readable_id": "using-the-product-rule-and-the-chain-rule"}, "wV1pllyOaj8": {"duration": 747, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/what-is-tb/", "keywords": "", "id": "wV1pllyOaj8", "title": "What is TB?", "description": "Find out the basics of TB, where it comes from and where it goes. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wV1pllyOaj8.mp4/wV1pllyOaj8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wV1pllyOaj8.mp4/wV1pllyOaj8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wV1pllyOaj8.m3u8/wV1pllyOaj8.m3u8"}, "slug": "what-is-tb", "video_id": "wV1pllyOaj8", "youtube_id": "wV1pllyOaj8", "readable_id": "what-is-tb"}, "RzEFGpe0rv4": {"duration": 141, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-sub-two-dig-intro/subtracting-two-digit-numbers-without-regrouping/", "keywords": "education,online learning,learning,lessons", "id": "RzEFGpe0rv4", "title": "Subtracting two-digit numbers without regrouping (example 2)", "description": "Learn how to subtract 31 from 64 by thinking about tens and ones.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RzEFGpe0rv4.mp4/RzEFGpe0rv4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RzEFGpe0rv4.mp4/RzEFGpe0rv4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RzEFGpe0rv4.m3u8/RzEFGpe0rv4.m3u8"}, "slug": "subtracting-two-digit-numbers-without-regrouping", "video_id": "RzEFGpe0rv4", "youtube_id": "RzEFGpe0rv4", "readable_id": "subtracting-two-digit-numbers-without-regrouping"}, "yahEP620480": {"duration": 210, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-basics-tutorial/what-is-inflation/", "keywords": "inflation, consumer, price, index, cpi, finance, economics", "id": "yahEP620480", "title": "What is inflation", "description": "The basics of what price inflation is and how the CPI-U is calculated", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yahEP620480.mp4/yahEP620480.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yahEP620480.mp4/yahEP620480.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yahEP620480.m3u8/yahEP620480.m3u8"}, "slug": "what-is-inflation", "video_id": "yahEP620480", "youtube_id": "yahEP620480", "readable_id": "what-is-inflation"}, "LaEokkaZkrw": {"duration": 426, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/exponential-decay-examples-edited/", "keywords": "", "id": "LaEokkaZkrw", "title": "More exponential decay examples", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LaEokkaZkrw.mp4/LaEokkaZkrw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LaEokkaZkrw.mp4/LaEokkaZkrw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LaEokkaZkrw.m3u8/LaEokkaZkrw.m3u8"}, "slug": "exponential-decay-examples-edited", "video_id": "LaEokkaZkrw", "youtube_id": "LaEokkaZkrw", "readable_id": "exponential-decay-examples-edited"}, "RsYgjO5BiHU": {"duration": 595, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/arterial-stiffness/compliance-decreased-blood-pressure/", "keywords": "", "id": "RsYgjO5BiHU", "title": "Compliance - decreased blood pressure", "description": "Find out how compliance allows arteries to store elastic energy (and lower pressure). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RsYgjO5BiHU.mp4/RsYgjO5BiHU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RsYgjO5BiHU.mp4/RsYgjO5BiHU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RsYgjO5BiHU.m3u8/RsYgjO5BiHU.m3u8"}, "slug": "compliance-decreased-blood-pressure", "video_id": "RsYgjO5BiHU", "youtube_id": "RsYgjO5BiHU", "readable_id": "compliance-decreased-blood-pressure"}, "JGU74wbZMLg": {"duration": 636, "path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-trig-functions-arcsin/", "keywords": "trigonometry, arcsin, arcsine, inverse, CC_39336_F-BF_4, CC_39336_F-BF_4_b, CC_39336_F-TF_3", "id": "JGU74wbZMLg", "title": "Inverse trig functions: arcsin", "description": "Introduction to the inverse trig function arcsin", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JGU74wbZMLg.mp4/JGU74wbZMLg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JGU74wbZMLg.mp4/JGU74wbZMLg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JGU74wbZMLg.m3u8/JGU74wbZMLg.m3u8"}, "slug": "inverse-trig-functions-arcsin", "video_id": "JGU74wbZMLg", "youtube_id": "JGU74wbZMLg", "readable_id": "inverse-trig-functions-arcsin"}, "Ld7Vxb5XV6A": {"duration": 281, "path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/using-algebra-to-find-measures-of-angles-formed-from-transversal/", "keywords": "", "id": "Ld7Vxb5XV6A", "title": "Using algebra to find measures of angles formed from transversal", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ld7Vxb5XV6A.mp4/Ld7Vxb5XV6A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ld7Vxb5XV6A.mp4/Ld7Vxb5XV6A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ld7Vxb5XV6A.m3u8/Ld7Vxb5XV6A.m3u8"}, "slug": "using-algebra-to-find-measures-of-angles-formed-from-transversal", "video_id": "Ld7Vxb5XV6A", "youtube_id": "Ld7Vxb5XV6A", "readable_id": "using-algebra-to-find-measures-of-angles-formed-from-transversal"}, "N21Wh4Jqftc": {"duration": 264, "path": "khan/math/pre-algebra/fractions-pre-alg/fractions-unlike-denom-pre-alg/subtracting-fractions-with-unlike-denominators/", "keywords": "", "id": "N21Wh4Jqftc", "title": "Example of subtracting fractions with unlike denominators", "description": "If you conquered adding fractions with different denominators, then subtracting fractions will be a snap. Don't worry...we'll take it slow and explain every step.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N21Wh4Jqftc.mp4/N21Wh4Jqftc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N21Wh4Jqftc.mp4/N21Wh4Jqftc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N21Wh4Jqftc.m3u8/N21Wh4Jqftc.m3u8"}, "slug": "subtracting-fractions-with-unlike-denominators", "video_id": "N21Wh4Jqftc", "youtube_id": "N21Wh4Jqftc", "readable_id": "subtracting-fractions-with-unlike-denominators"}, "xKH1Evwu150": {"duration": 359, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/linear-equation-word-problems-tu/linear-equation-word-problem-example/", "keywords": "", "id": "xKH1Evwu150", "title": "Linear equation word problem", "description": "Learn how to solve a word problem by writing an equation to model the situation. In this video, we use the linear equation 210(t-5) = 41,790.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xKH1Evwu150.mp4/xKH1Evwu150.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xKH1Evwu150.mp4/xKH1Evwu150.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xKH1Evwu150.m3u8/xKH1Evwu150.m3u8"}, "slug": "linear-equation-word-problem-example", "video_id": "xKH1Evwu150", "youtube_id": "xKH1Evwu150", "readable_id": "linear-equation-word-problem-example"}, "diCb6JkLlQE": {"duration": 511, "path": "khan/science/organic-chemistry/organic-structures/acid-base-review/acid-base-lewis-bronsted-lowry/", "keywords": "", "id": "diCb6JkLlQE", "title": "Acid-base definitions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/diCb6JkLlQE.mp4/diCb6JkLlQE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/diCb6JkLlQE.mp4/diCb6JkLlQE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/diCb6JkLlQE.m3u8/diCb6JkLlQE.m3u8"}, "slug": "acid-base-lewis-bronsted-lowry", "video_id": "diCb6JkLlQE", "youtube_id": "diCb6JkLlQE", "readable_id": "acid-base-lewis-bronsted-lowry"}, "EIm1BSVCpno": {"duration": 621, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/emphysema-treatment/", "keywords": "", "id": "EIm1BSVCpno", "title": "Emphysema treatment", "description": "The best way to prevent and manage emphysema is to stop smoking. Learn how drugs such as bronchodilators, antibiotics, and steroids can be used to manage the symptoms of emphysema.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EIm1BSVCpno.mp4/EIm1BSVCpno.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EIm1BSVCpno.mp4/EIm1BSVCpno.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EIm1BSVCpno.m3u8/EIm1BSVCpno.m3u8"}, "slug": "emphysema-treatment", "video_id": "EIm1BSVCpno", "youtube_id": "EIm1BSVCpno", "readable_id": "emphysema-treatment"}, "Y70TTv5ZLkk": {"duration": 146, "path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/reflection-and-mapping-points-example/", "keywords": "", "id": "Y70TTv5ZLkk", "title": "Reflection and mapping points example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y70TTv5ZLkk.mp4/Y70TTv5ZLkk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y70TTv5ZLkk.mp4/Y70TTv5ZLkk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y70TTv5ZLkk.m3u8/Y70TTv5ZLkk.m3u8"}, "slug": "reflection-and-mapping-points-example", "video_id": "Y70TTv5ZLkk", "youtube_id": "Y70TTv5ZLkk", "readable_id": "reflection-and-mapping-points-example"}, "MABWdzmZFIQ": {"duration": 215, "path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-tan-scenario/", "keywords": "", "id": "MABWdzmZFIQ", "title": "Inverse tangent scenario", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MABWdzmZFIQ.mp4/MABWdzmZFIQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MABWdzmZFIQ.mp4/MABWdzmZFIQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MABWdzmZFIQ.m3u8/MABWdzmZFIQ.m3u8"}, "slug": "inverse-tan-scenario", "video_id": "MABWdzmZFIQ", "youtube_id": "MABWdzmZFIQ", "readable_id": "inverse-tan-scenario"}, "0isM0GF-rMI": {"duration": 418, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/supply-curve-tutorial/factors-affecting-supply/", "keywords": "economics, supply, demand", "id": "0isM0GF-rMI", "title": "Factors affecting supply", "description": "How the price of inputs, price of related goods, number of suppliers technology, and expected future prices affects the supply curve", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0isM0GF-rMI.mp4/0isM0GF-rMI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0isM0GF-rMI.mp4/0isM0GF-rMI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0isM0GF-rMI.m3u8/0isM0GF-rMI.m3u8"}, "slug": "factors-affecting-supply", "video_id": "0isM0GF-rMI", "youtube_id": "0isM0GF-rMI", "readable_id": "factors-affecting-supply"}, "TkZ5IywDBnQ": {"duration": 482, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-complications/", "keywords": "", "id": "TkZ5IywDBnQ", "title": "Lung cancer complications", "description": "Learn how the mass of a tumor, the spread of cancer cells, the immune system\u2019s response, and the hormones released from cancer cells contribute to the complications of lung cancer.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TkZ5IywDBnQ.mp4/TkZ5IywDBnQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TkZ5IywDBnQ.mp4/TkZ5IywDBnQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TkZ5IywDBnQ.m3u8/TkZ5IywDBnQ.m3u8"}, "slug": "lung-cancer-complications", "video_id": "TkZ5IywDBnQ", "youtube_id": "TkZ5IywDBnQ", "readable_id": "lung-cancer-complications"}, "R_aqSL-q6_8": {"duration": 605, "path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-1/", "keywords": "calculus, volume, rotation", "id": "R_aqSL-q6_8", "title": "Disc method: Function rotated about x-axis", "description": "Figuring out the volume of a function rotated about the x-axis.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R_aqSL-q6_8.mp4/R_aqSL-q6_8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R_aqSL-q6_8.mp4/R_aqSL-q6_8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R_aqSL-q6_8.m3u8/R_aqSL-q6_8.m3u8"}, "slug": "solid-of-revolution-part-1", "video_id": "R_aqSL-q6_8", "youtube_id": "R_aqSL-q6_8", "readable_id": "solid-of-revolution-part-1"}, "GvmZQXbWP3g": {"duration": 151, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-4/", "keywords": "", "id": "GvmZQXbWP3g", "title": "4 Kay's swimming brothers", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GvmZQXbWP3g.mp4/GvmZQXbWP3g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GvmZQXbWP3g.mp4/GvmZQXbWP3g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GvmZQXbWP3g.m3u8/GvmZQXbWP3g.m3u8"}, "slug": "2013-sat-practice-6-4", "video_id": "GvmZQXbWP3g", "youtube_id": "GvmZQXbWP3g", "readable_id": "2013-sat-practice-6-4"}, "UA975j_qsTQ": {"duration": 44, "path": "khan/math/early-math/cc-early-math-counting-topic/cc-early-math-comparing-numbers/count-by-category/", "keywords": "", "id": "UA975j_qsTQ", "title": "Count by category", "description": "Learn categorize objects then count the number of things in each category.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UA975j_qsTQ.mp4/UA975j_qsTQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UA975j_qsTQ.mp4/UA975j_qsTQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UA975j_qsTQ.m3u8/UA975j_qsTQ.m3u8"}, "slug": "count-by-category", "video_id": "UA975j_qsTQ", "youtube_id": "UA975j_qsTQ", "readable_id": "count-by-category"}, "TEjZlQUuxvc": {"duration": 71, "path": "khan/college-admissions/get-started/importance-of-college/ss-college-expands-opportunities/", "keywords": "", "id": "TEjZlQUuxvc", "title": "Student story: College expands opportunities", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TEjZlQUuxvc.mp4/TEjZlQUuxvc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TEjZlQUuxvc.mp4/TEjZlQUuxvc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TEjZlQUuxvc.m3u8/TEjZlQUuxvc.m3u8"}, "slug": "ss-college-expands-opportunities", "video_id": "TEjZlQUuxvc", "youtube_id": "TEjZlQUuxvc", "readable_id": "ss-college-expands-opportunities"}, "TpIBLnRAslI": {"duration": 515, "path": "khan/math/geometry/triangle-properties/angle_bisectors/angle-bisector-theorem-proof/", "keywords": "Angle, Bisector, Theorem, Proof", "id": "TpIBLnRAslI", "title": "Angle bisector theorem proof", "description": "What the angle bisector theorem is and its proof", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TpIBLnRAslI.mp4/TpIBLnRAslI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TpIBLnRAslI.mp4/TpIBLnRAslI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TpIBLnRAslI.m3u8/TpIBLnRAslI.m3u8"}, "slug": "angle-bisector-theorem-proof", "video_id": "TpIBLnRAslI", "youtube_id": "TpIBLnRAslI", "readable_id": "angle-bisector-theorem-proof"}, "BE1FK7vDVq0": {"duration": 186, "path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/breaking-integral-interval/", "keywords": "", "id": "BE1FK7vDVq0", "title": "Breaking up integral interval", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BE1FK7vDVq0.mp4/BE1FK7vDVq0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BE1FK7vDVq0.mp4/BE1FK7vDVq0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BE1FK7vDVq0.m3u8/BE1FK7vDVq0.m3u8"}, "slug": "breaking-integral-interval", "video_id": "BE1FK7vDVq0", "youtube_id": "BE1FK7vDVq0", "readable_id": "breaking-integral-interval"}, "-cApVwKR1Ps": {"duration": 553, "path": "khan/math/differential-equations/laplace-transform/laplace-transform-tutorial/laplace-transform-4/", "keywords": "Laplace, Transform", "id": "-cApVwKR1Ps", "title": "Part 2 of the transform of the sin(at)", "description": "Part 2 of getting the Laplace transform of sin(at)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-cApVwKR1Ps.mp4/-cApVwKR1Ps.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-cApVwKR1Ps.mp4/-cApVwKR1Ps.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-cApVwKR1Ps.m3u8/-cApVwKR1Ps.m3u8"}, "slug": "laplace-transform-4", "video_id": "-cApVwKR1Ps", "youtube_id": "-cApVwKR1Ps", "readable_id": "laplace-transform-4"}, "0YErxSShF0A": {"duration": 271, "path": "khan/math/algebra/linear_inequalities/compound_absolute_value_inequali/compund-inequalities/", "keywords": "u10_l3_t1_we1, Compund, Inequalities", "id": "0YErxSShF0A", "title": "Compound inequalities", "description": "Compound Inequalities", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0YErxSShF0A.mp4/0YErxSShF0A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0YErxSShF0A.mp4/0YErxSShF0A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0YErxSShF0A.m3u8/0YErxSShF0A.m3u8"}, "slug": "compund-inequalities", "video_id": "0YErxSShF0A", "youtube_id": "0YErxSShF0A", "readable_id": "compund-inequalities"}, "0OloYD_kSbU": {"duration": 116, "path": "khan/test-prep/ap-art-history/introduction-ap-arthistory/why-look-at-art/", "keywords": "", "id": "0OloYD_kSbU", "title": "Why look at art?", "description": "Why look at art? This was the question we posed to several of our colleagues at a conference for museum professionals. Special thanks to Laura Mann, Anna Velez, an anonymous professional, and David Torgersen whose voices and insights are included here.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0OloYD_kSbU.mp4/0OloYD_kSbU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0OloYD_kSbU.mp4/0OloYD_kSbU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0OloYD_kSbU.m3u8/0OloYD_kSbU.m3u8"}, "slug": "why-look-at-art", "video_id": "0OloYD_kSbU", "youtube_id": "0OloYD_kSbU", "readable_id": "why-look-at-art"}, "baifq1b1-i4": {"duration": 174, "path": "khan/humanities/renaissance-reformation/northern/cranach-altdorfer/lucas-cranach-the-elder-cupid-complaining-to-venus-c-1525/", "keywords": "National Gallery, London, Khan Academy, smarthistory, art history, Google Art Project, OER, Lucas Cranach the Elder, Cranach, Cupid complaining to Venus, Cupid, Venus, complaining", "id": "baifq1b1-i4", "title": "Cranach the Elder, Cupid complaining to Venus", "description": "Lucas Cranach the Elder, Cupid complaining to Venus, c. 1525, oil on wood, 81.3 x 54.6 cm (The National Gallery, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/baifq1b1-i4.mp4/baifq1b1-i4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/baifq1b1-i4.mp4/baifq1b1-i4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/baifq1b1-i4.m3u8/baifq1b1-i4.m3u8"}, "slug": "lucas-cranach-the-elder-cupid-complaining-to-venus-c-1525", "video_id": "baifq1b1-i4", "youtube_id": "baifq1b1-i4", "readable_id": "lucas-cranach-the-elder-cupid-complaining-to-venus-c-1525"}, "3B-V_pG3HPQ": {"duration": 697, "path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/fra-angelico-the-annunciation-c-1438-47/", "keywords": "art history, smarthistory, Fra Angelico, San Marco", "id": "3B-V_pG3HPQ", "title": "Fra Angelico, The Annunciation", "description": "Fra Angelico, The Annunciation, c. 1438-47, fresco, 230 x 321 cm (Convent of San Marco, Florence). \u00a0Speakers: Dr Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3B-V_pG3HPQ.mp4/3B-V_pG3HPQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3B-V_pG3HPQ.mp4/3B-V_pG3HPQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3B-V_pG3HPQ.m3u8/3B-V_pG3HPQ.m3u8"}, "slug": "fra-angelico-the-annunciation-c-1438-47", "video_id": "3B-V_pG3HPQ", "youtube_id": "3B-V_pG3HPQ", "readable_id": "fra-angelico-the-annunciation-c-1438-47"}, "ikadoCpDNT8": {"duration": 238, "path": "khan/math/precalculus/precalc-matrices/zero-identity-matrix-tutorial/identity-zero-matrix-equation/", "keywords": "", "id": "ikadoCpDNT8", "title": "Identity and zero matrix equation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ikadoCpDNT8.mp4/ikadoCpDNT8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ikadoCpDNT8.mp4/ikadoCpDNT8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ikadoCpDNT8.m3u8/ikadoCpDNT8.m3u8"}, "slug": "identity-zero-matrix-equation", "video_id": "ikadoCpDNT8", "youtube_id": "ikadoCpDNT8", "readable_id": "identity-zero-matrix-equation"}, "5ZXB-gCs1oM": {"duration": 114, "path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/parts-for-spout/", "keywords": "", "id": "5ZXB-gCs1oM", "title": "Parts for Spout", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5ZXB-gCs1oM.mp4/5ZXB-gCs1oM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5ZXB-gCs1oM.mp4/5ZXB-gCs1oM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5ZXB-gCs1oM.m3u8/5ZXB-gCs1oM.m3u8"}, "slug": "parts-for-spout", "video_id": "5ZXB-gCs1oM", "youtube_id": "5ZXB-gCs1oM", "readable_id": "parts-for-spout"}, "iUzfsUOl3-A": {"duration": 451, "path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-2/", "keywords": "volume, of, rotation, calculus, math", "id": "iUzfsUOl3-A", "title": "Disc method (rotating f(x) about x axis)", "description": "The volume of y=sqrt(x) between x=0 and x=1 rotated around x-axis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iUzfsUOl3-A.mp4/iUzfsUOl3-A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iUzfsUOl3-A.mp4/iUzfsUOl3-A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iUzfsUOl3-A.m3u8/iUzfsUOl3-A.m3u8"}, "slug": "solid-of-revolution-part-2", "video_id": "iUzfsUOl3-A", "youtube_id": "iUzfsUOl3-A", "readable_id": "solid-of-revolution-part-2"}, "u-jigaMJT10": {"duration": 343, "path": "khan/test-prep/mcat/physical-processes/capacitors/capacitors-and-capacitance/", "keywords": "", "id": "u-jigaMJT10", "title": "Capacitors and capacitance", "description": "A basic overview of capacitors and capacitance. By David Santo Pietro.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u-jigaMJT10.mp4/u-jigaMJT10.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u-jigaMJT10.mp4/u-jigaMJT10.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u-jigaMJT10.m3u8/u-jigaMJT10.m3u8"}, "slug": "capacitors-and-capacitance", "video_id": "u-jigaMJT10", "youtube_id": "u-jigaMJT10", "readable_id": "capacitors-and-capacitance"}, "YEEbMd2AGag": {"duration": 448, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e2-elimination-mechanism/", "keywords": "", "id": "YEEbMd2AGag", "title": "E2 elimination: Mechanism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YEEbMd2AGag.mp4/YEEbMd2AGag.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YEEbMd2AGag.mp4/YEEbMd2AGag.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YEEbMd2AGag.m3u8/YEEbMd2AGag.m3u8"}, "slug": "e2-elimination-mechanism", "video_id": "YEEbMd2AGag", "youtube_id": "YEEbMd2AGag", "readable_id": "e2-elimination-mechanism"}, "22HqkuYT270": {"duration": 649, "path": "khan/test-prep/mcat/physical-processes/magnetism-mcat/magnetism-part-3/", "keywords": "", "id": "22HqkuYT270", "title": "Magnetism - Part 3", "description": "Applying the magnetic force equation to a proton moving in a magnetic field, and learning that a magnetic field induces circular motion", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/22HqkuYT270.mp4/22HqkuYT270.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/22HqkuYT270.mp4/22HqkuYT270.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/22HqkuYT270.m3u8/22HqkuYT270.m3u8"}, "slug": "magnetism-part-3", "video_id": "22HqkuYT270", "youtube_id": "22HqkuYT270", "readable_id": "magnetism-part-3"}, "fYQ3GRSu4JU": {"duration": 231, "path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/rotation-by-radians-and-quadrants/", "keywords": "", "id": "fYQ3GRSu4JU", "title": "Rotation by radians and quadrants", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fYQ3GRSu4JU.mp4/fYQ3GRSu4JU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fYQ3GRSu4JU.mp4/fYQ3GRSu4JU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fYQ3GRSu4JU.m3u8/fYQ3GRSu4JU.m3u8"}, "slug": "rotation-by-radians-and-quadrants", "video_id": "fYQ3GRSu4JU", "youtube_id": "fYQ3GRSu4JU", "readable_id": "rotation-by-radians-and-quadrants"}, "2Pz_p8Tf24g": {"duration": 395, "path": "khan/humanities/ancient-art-civilizations/judaism-art/arch-of-titus-relief/", "keywords": "art history, titus, ancient rome, relief sculpture, ", "id": "2Pz_p8Tf24g", "title": "Relief from the Arch of Titus, showing The Spoils of Jerusalem being brought into Rome", "description": "Relief panel showing The Spoils of Jerusalem being brought into Rome, Arch of Titus, Rome, after 81 C.E., marble, 7 feet,10 inches high. Speakers: Dr. Steven Fine and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2Pz_p8Tf24g.mp4/2Pz_p8Tf24g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2Pz_p8Tf24g.mp4/2Pz_p8Tf24g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2Pz_p8Tf24g.m3u8/2Pz_p8Tf24g.m3u8"}, "slug": "arch-of-titus-relief", "video_id": "2Pz_p8Tf24g", "youtube_id": "2Pz_p8Tf24g", "readable_id": "arch-of-titus-relief"}, "FsE3QvWqeqs": {"duration": 723, "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/genetics-and-parkinsons-disease/", "keywords": "", "id": "FsE3QvWqeqs", "title": "Genetics and Parkinson's disease", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FsE3QvWqeqs.mp4/FsE3QvWqeqs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FsE3QvWqeqs.mp4/FsE3QvWqeqs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FsE3QvWqeqs.m3u8/FsE3QvWqeqs.m3u8"}, "slug": "genetics-and-parkinsons-disease", "video_id": "FsE3QvWqeqs", "youtube_id": "FsE3QvWqeqs", "readable_id": "genetics-and-parkinsons-disease"}, "QKUOYpsbROk": {"duration": 345, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-types/", "keywords": "", "id": "QKUOYpsbROk", "title": "Lung cancer types", "description": "There are several different types of lung cancer, such as small cell lung cancer, non-small cell lung cancer, adenocarcinoma, squamous cell carcinoma, large cell carcinoma, and carcinoid . Learn how each type of lung cancer occurs, and how common they are amongst other lung cancers.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QKUOYpsbROk.mp4/QKUOYpsbROk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QKUOYpsbROk.mp4/QKUOYpsbROk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QKUOYpsbROk.m3u8/QKUOYpsbROk.m3u8"}, "slug": "lung-cancer-types", "video_id": "QKUOYpsbROk", "youtube_id": "QKUOYpsbROk", "readable_id": "lung-cancer-types"}, "77CApfQlTuE": {"duration": 344, "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/monopoly-basics/", "keywords": "microeconomics", "id": "77CApfQlTuE", "title": "Monopoly basics", "description": "Thinking about what would happen with one airline. The opposite of perfect competition", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/77CApfQlTuE.mp4/77CApfQlTuE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/77CApfQlTuE.mp4/77CApfQlTuE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/77CApfQlTuE.m3u8/77CApfQlTuE.m3u8"}, "slug": "monopoly-basics", "video_id": "77CApfQlTuE", "youtube_id": "77CApfQlTuE", "readable_id": "monopoly-basics"}, "5c9N_1PEfHw": {"duration": 503, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/linear-functions-modeling/constructing-linear-functions-2/", "keywords": "", "id": "5c9N_1PEfHw", "title": "Constructing linear functions example 2", "description": "Linear model for painting", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5c9N_1PEfHw.mp4/5c9N_1PEfHw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5c9N_1PEfHw.mp4/5c9N_1PEfHw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5c9N_1PEfHw.m3u8/5c9N_1PEfHw.m3u8"}, "slug": "constructing-linear-functions-2", "video_id": "5c9N_1PEfHw", "youtube_id": "5c9N_1PEfHw", "readable_id": "constructing-linear-functions-2"}, "dsvLLKQCxeA": {"duration": 560, "path": "khan/math/recreational-math/vi-hart/doodling-in-math/dragondungeons/", "keywords": "", "id": "dsvLLKQCxeA", "title": "Doodling in math: Dragon dungeons", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dsvLLKQCxeA.mp4/dsvLLKQCxeA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dsvLLKQCxeA.mp4/dsvLLKQCxeA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dsvLLKQCxeA.m3u8/dsvLLKQCxeA.m3u8"}, "slug": "dragondungeons", "video_id": "dsvLLKQCxeA", "youtube_id": "dsvLLKQCxeA", "readable_id": "dragondungeons"}, "GH8-URjRQpQ": {"duration": 437, "path": "khan/math/differential-calculus/derivative_applications/normal-tangent-line-eq/tangent-line-equation-example-1/", "keywords": "", "id": "GH8-URjRQpQ", "title": "Equation of tangent line example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GH8-URjRQpQ.mp4/GH8-URjRQpQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GH8-URjRQpQ.mp4/GH8-URjRQpQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GH8-URjRQpQ.m3u8/GH8-URjRQpQ.m3u8"}, "slug": "tangent-line-equation-example-1", "video_id": "GH8-URjRQpQ", "youtube_id": "GH8-URjRQpQ", "readable_id": "tangent-line-equation-example-1"}, "GpwAsXrBJ-Q": {"duration": 190, "path": "khan/humanities/art-1010/pop/lichtenstein-rouen-cathedral-set-v-1969/", "keywords": "Lichtenstein, Rouen, Art History, Smarthistory, Pop Art", "id": "GpwAsXrBJ-Q", "title": "Lichtenstein, Rouen Cathedral Set V", "description": "Roy Lichtenstein, Rouen Cathedral Set V, 1969, oil and magna on canvas, 3 canvases: 63-5/8 x 141-7/8 x 1-3/4 inches or 161.61 x 360.36 x 4.45 cm (SFMOMA). Speakers: Dr,. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GpwAsXrBJ-Q.mp4/GpwAsXrBJ-Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GpwAsXrBJ-Q.mp4/GpwAsXrBJ-Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GpwAsXrBJ-Q.m3u8/GpwAsXrBJ-Q.m3u8"}, "slug": "lichtenstein-rouen-cathedral-set-v-1969", "video_id": "GpwAsXrBJ-Q", "youtube_id": "GpwAsXrBJ-Q", "readable_id": "lichtenstein-rouen-cathedral-set-v-1969"}, "C-qg2Lcy6Ts": {"duration": 634, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-19/", "keywords": "gmat, data, sufficiency", "id": "C-qg2Lcy6Ts", "title": "GMAT: Data sufficiency 19", "description": "84-86, pg. 285", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C-qg2Lcy6Ts.mp4/C-qg2Lcy6Ts.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C-qg2Lcy6Ts.mp4/C-qg2Lcy6Ts.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C-qg2Lcy6Ts.m3u8/C-qg2Lcy6Ts.m3u8"}, "slug": "gmat-data-sufficiency-19", "video_id": "C-qg2Lcy6Ts", "youtube_id": "C-qg2Lcy6Ts", "readable_id": "gmat-data-sufficiency-19"}, "yA-NYmO8dDk": {"duration": 449, "path": "khan/humanities/history/1600s-1800s/benjamin-franklin/benjamin-franklin-writer/", "keywords": "", "id": "yA-NYmO8dDk", "title": "Benjamin Franklin becomes a writer", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson discuss Benjamin Franklin the writer.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yA-NYmO8dDk.mp4/yA-NYmO8dDk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yA-NYmO8dDk.mp4/yA-NYmO8dDk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yA-NYmO8dDk.m3u8/yA-NYmO8dDk.m3u8"}, "slug": "benjamin-franklin-writer", "video_id": "yA-NYmO8dDk", "youtube_id": "yA-NYmO8dDk", "readable_id": "benjamin-franklin-writer"}, "dfZ9_vFwCA4": {"duration": 451, "path": "khan/test-prep/mcat/physical-processes/gas-phase/derivation-of-gas-constants-using-molar-volume-and-stp/", "keywords": "", "id": "dfZ9_vFwCA4", "title": "Derivation of gas constants using molar volume and STP", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dfZ9_vFwCA4.mp4/dfZ9_vFwCA4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dfZ9_vFwCA4.mp4/dfZ9_vFwCA4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dfZ9_vFwCA4.m3u8/dfZ9_vFwCA4.m3u8"}, "slug": "derivation-of-gas-constants-using-molar-volume-and-stp", "video_id": "dfZ9_vFwCA4", "youtube_id": "dfZ9_vFwCA4", "readable_id": "derivation-of-gas-constants-using-molar-volume-and-stp"}, "-nrSCokEUXg": {"duration": 226, "path": "khan/humanities/global-culture/identity-body/identity-body-united-states/hesse-untitled-rope-piece-1970/", "keywords": "Hesse, Art History, Smarthistory", "id": "-nrSCokEUXg", "title": "Hesse, Untitled (Rope Piece)", "description": "Eva Hesse, Untitled (Rope Piece), 1970, rope, latex, string, wire, variable dimensions (Whitney Museum of American Art) Speakers: Dr. Beth Harris and Dr. Steven Zucker For more: http://smarthistory.org/untitled-rope-piece.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-nrSCokEUXg.mp4/-nrSCokEUXg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-nrSCokEUXg.mp4/-nrSCokEUXg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-nrSCokEUXg.m3u8/-nrSCokEUXg.m3u8"}, "slug": "hesse-untitled-rope-piece-1970", "video_id": "-nrSCokEUXg", "youtube_id": "-nrSCokEUXg", "readable_id": "hesse-untitled-rope-piece-1970"}, "TQwe0Y4Ynjs": {"duration": 466, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/electrical-conduction-in-heart-cells/", "keywords": "", "id": "TQwe0Y4Ynjs", "title": "Electrical conduction in heart cells", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TQwe0Y4Ynjs.mp4/TQwe0Y4Ynjs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TQwe0Y4Ynjs.mp4/TQwe0Y4Ynjs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TQwe0Y4Ynjs.m3u8/TQwe0Y4Ynjs.m3u8"}, "slug": "electrical-conduction-in-heart-cells", "video_id": "TQwe0Y4Ynjs", "youtube_id": "TQwe0Y4Ynjs", "readable_id": "electrical-conduction-in-heart-cells"}, "45qlm6cfHgg": {"duration": 189, "path": "khan/test-prep/mcat/processing-the-environment/memory/aging-and-cognitive-abilities/", "keywords": "", "id": "45qlm6cfHgg", "title": "Aging and cognitive abilities", "description": "Learn about how cognitive abilities change as we age.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/45qlm6cfHgg.mp4/45qlm6cfHgg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/45qlm6cfHgg.mp4/45qlm6cfHgg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/45qlm6cfHgg.m3u8/45qlm6cfHgg.m3u8"}, "slug": "aging-and-cognitive-abilities", "video_id": "45qlm6cfHgg", "youtube_id": "45qlm6cfHgg", "readable_id": "aging-and-cognitive-abilities"}, "hACdhD_kes8": {"duration": 315, "path": "khan/partner-content/wi-phi/value-theory-1/consequentialism/", "keywords": "", "id": "hACdhD_kes8", "title": "Ethics: Consequentialism", "description": "In this video, Julia Driver (Washington University in St. Louis) introduces us to the ethical theory of consequentialism. Help us caption & translate this video!\n\nSpeaker: Dr. Julia Driver, Professor of Philosophy, Washington University at St. Louis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hACdhD_kes8.mp4/hACdhD_kes8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hACdhD_kes8.mp4/hACdhD_kes8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hACdhD_kes8.m3u8/hACdhD_kes8.m3u8"}, "slug": "consequentialism", "video_id": "hACdhD_kes8", "youtube_id": "hACdhD_kes8", "readable_id": "consequentialism"}, "VX7K8iqoiRc": {"duration": 487, "path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-upper-triangular-determinant/", "keywords": "linear, algebra, determinant", "id": "VX7K8iqoiRc", "title": "Upper triangular determinant", "description": "The determinant of an upper triangular matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VX7K8iqoiRc.mp4/VX7K8iqoiRc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VX7K8iqoiRc.mp4/VX7K8iqoiRc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VX7K8iqoiRc.m3u8/VX7K8iqoiRc.m3u8"}, "slug": "linear-algebra-upper-triangular-determinant", "video_id": "VX7K8iqoiRc", "youtube_id": "VX7K8iqoiRc", "readable_id": "linear-algebra-upper-triangular-determinant"}, "zNlL0M4jWaw": {"duration": 144, "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments/sscc-blended-labnav/", "keywords": "", "id": "zNlL0M4jWaw", "title": "Redesigning the school day at Navigator Schools using a lab rotation model", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zNlL0M4jWaw.mp4/zNlL0M4jWaw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zNlL0M4jWaw.mp4/zNlL0M4jWaw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zNlL0M4jWaw.m3u8/zNlL0M4jWaw.m3u8"}, "slug": "sscc-blended-labnav", "video_id": "zNlL0M4jWaw", "youtube_id": "zNlL0M4jWaw", "readable_id": "sscc-blended-labnav"}, "sU5MCM3npXU": {"duration": 371, "path": "khan/math/differential-equations/first-order-differential-equations/differential-equations-intro/differential-equation-from-slope-field/", "keywords": "", "id": "sU5MCM3npXU", "title": "Differential equation from slope field", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sU5MCM3npXU.mp4/sU5MCM3npXU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sU5MCM3npXU.mp4/sU5MCM3npXU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sU5MCM3npXU.m3u8/sU5MCM3npXU.m3u8"}, "slug": "differential-equation-from-slope-field", "video_id": "sU5MCM3npXU", "youtube_id": "sU5MCM3npXU", "readable_id": "differential-equation-from-slope-field"}, "Qf3RMGXR-h8": {"duration": 678, "path": "khan/math/probability/descriptive-statistics/old-stats-videos/statistics-sample-variance/", "keywords": "statistics, sample, variance, estimator, CC_6_SP_3, CC_6_SP_4, CC_6_SP_5_a, CC_6_SP_5_c, CC_7_SP_1", "id": "Qf3RMGXR-h8", "title": "Statistics: Sample variance", "description": "Using the variance of a sample to estimate the variance of a population", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qf3RMGXR-h8.mp4/Qf3RMGXR-h8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qf3RMGXR-h8.mp4/Qf3RMGXR-h8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qf3RMGXR-h8.m3u8/Qf3RMGXR-h8.m3u8"}, "slug": "statistics-sample-variance", "video_id": "Qf3RMGXR-h8", "youtube_id": "Qf3RMGXR-h8", "readable_id": "statistics-sample-variance"}, "Rsi5mzEaCPw": {"duration": 693, "path": "khan/math/geometry/triangle-properties/medians_centroids/exploring-medial-triangles/", "keywords": "geometry", "id": "Rsi5mzEaCPw", "title": "Exploring medial triangles", "description": "What a medial triangle is and its properties", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Rsi5mzEaCPw.mp4/Rsi5mzEaCPw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Rsi5mzEaCPw.mp4/Rsi5mzEaCPw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Rsi5mzEaCPw.m3u8/Rsi5mzEaCPw.m3u8"}, "slug": "exploring-medial-triangles", "video_id": "Rsi5mzEaCPw", "youtube_id": "Rsi5mzEaCPw", "readable_id": "exploring-medial-triangles"}, "yYGf7xn7TyM": {"duration": 343, "path": "khan/math/algebra/sequences/modeling-with-sequences/modeling-situations-with-arithmetic-and-geometric-sequences/", "keywords": "education,online learning,learning,lessons,geometric sequence,arithmetic sequence", "id": "yYGf7xn7TyM", "title": "How to model situations with arithmetic and geometric sequences (example)", "description": "Sal solves two word problems about modeling real-world situations with arithmetic and geometric sequences.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yYGf7xn7TyM.mp4/yYGf7xn7TyM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yYGf7xn7TyM.mp4/yYGf7xn7TyM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yYGf7xn7TyM.m3u8/yYGf7xn7TyM.m3u8"}, "slug": "modeling-situations-with-arithmetic-and-geometric-sequences", "video_id": "yYGf7xn7TyM", "youtube_id": "yYGf7xn7TyM", "readable_id": "modeling-situations-with-arithmetic-and-geometric-sequences"}, "NEaLgGi4Vh4": {"duration": 181, "path": "khan/math/algebra/introduction-to-algebra/variable-and-expressions/evaluating-exponential-expressions-2/", "keywords": "u11_l1_t1_we2, Evaluating, exponential, expressions, CC_6_EE_1, CC_6_EE_2, CC_6_EE_2_c, CC_8_EE_1, CC_39336_A-CED_1", "id": "NEaLgGi4Vh4", "title": "Evaluating exponential expressions 2", "description": "Evaluating exponential expressions 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NEaLgGi4Vh4.mp4/NEaLgGi4Vh4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NEaLgGi4Vh4.mp4/NEaLgGi4Vh4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NEaLgGi4Vh4.m3u8/NEaLgGi4Vh4.m3u8"}, "slug": "evaluating-exponential-expressions-2", "video_id": "NEaLgGi4Vh4", "youtube_id": "NEaLgGi4Vh4", "readable_id": "evaluating-exponential-expressions-2"}, "XFuFxgbnkaM": {"duration": 712, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-20/", "keywords": "gmat, data, sufficiency, math", "id": "XFuFxgbnkaM", "title": "GMAT: Data sufficiency 20", "description": "87-90, pg. 285", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XFuFxgbnkaM.mp4/XFuFxgbnkaM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XFuFxgbnkaM.mp4/XFuFxgbnkaM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XFuFxgbnkaM.m3u8/XFuFxgbnkaM.m3u8"}, "slug": "gmat-data-sufficiency-20", "video_id": "XFuFxgbnkaM", "youtube_id": "XFuFxgbnkaM", "readable_id": "gmat-data-sufficiency-20"}, "FL3Q5Q6IdAY": {"duration": 451, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/systolic-heart-failure-pathophysiology/", "keywords": "", "id": "FL3Q5Q6IdAY", "title": "Systolic heart failure pathophysiology", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FL3Q5Q6IdAY.mp4/FL3Q5Q6IdAY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FL3Q5Q6IdAY.mp4/FL3Q5Q6IdAY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FL3Q5Q6IdAY.m3u8/FL3Q5Q6IdAY.m3u8"}, "slug": "systolic-heart-failure-pathophysiology", "video_id": "FL3Q5Q6IdAY", "youtube_id": "FL3Q5Q6IdAY", "readable_id": "systolic-heart-failure-pathophysiology"}, "W0VWO4asgmk": {"duration": 457, "path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/introduction-to-limits/", "keywords": "calculus, math, limit, limits, khan, academy, CC_39336_A-CED_2, CC_39336_F-BF_1, CC_39336_F-BF_1_c, CC_39336_F-IF_2, CC_39336_F-IF_7", "id": "W0VWO4asgmk", "title": "Introduction to limits", "description": "Introduction to the intuition behind limits", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W0VWO4asgmk.mp4/W0VWO4asgmk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W0VWO4asgmk.mp4/W0VWO4asgmk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W0VWO4asgmk.m3u8/W0VWO4asgmk.m3u8"}, "slug": "introduction-to-limits", "video_id": "W0VWO4asgmk", "youtube_id": "W0VWO4asgmk", "readable_id": "introduction-to-limits"}, "An46SYAxhtc": {"duration": 114, "path": "khan/math/early-math/cc-early-math-add-sub-basics/cc-early-math-make-10/getting-to-10-by-filling-boxes/", "keywords": "", "id": "An46SYAxhtc", "title": "Getting to 10 by filling boxes", "description": "Learn how to add two numbers to make 10. This video shows two examples: 3 + ___ = 10 and 6 + ___ = 10.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/An46SYAxhtc.mp4/An46SYAxhtc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/An46SYAxhtc.mp4/An46SYAxhtc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/An46SYAxhtc.m3u8/An46SYAxhtc.m3u8"}, "slug": "getting-to-10-by-filling-boxes", "video_id": "An46SYAxhtc", "youtube_id": "An46SYAxhtc", "readable_id": "getting-to-10-by-filling-boxes"}, "W-huWpNU-9w": {"duration": 551, "path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/henri-matisse-the-red-studio-1911/", "keywords": "matisse, MoMA, Smarthistory, art, art history, Fauvism", "id": "W-huWpNU-9w", "title": "Matisse, The Red Studio", "description": "Henri Matisse, The Red Studio, oil on canvas, 1911 (MoMA)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W-huWpNU-9w.mp4/W-huWpNU-9w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W-huWpNU-9w.mp4/W-huWpNU-9w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W-huWpNU-9w.m3u8/W-huWpNU-9w.m3u8"}, "slug": "henri-matisse-the-red-studio-1911", "video_id": "W-huWpNU-9w", "youtube_id": "W-huWpNU-9w", "readable_id": "henri-matisse-the-red-studio-1911"}, "bflHwVKgRNE": {"duration": 443, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/breast-anatomy-and-lactation/", "keywords": "", "id": "bflHwVKgRNE", "title": "Breast anatomy and lactation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bflHwVKgRNE.mp4/bflHwVKgRNE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bflHwVKgRNE.mp4/bflHwVKgRNE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bflHwVKgRNE.m3u8/bflHwVKgRNE.m3u8"}, "slug": "breast-anatomy-and-lactation", "video_id": "bflHwVKgRNE", "youtube_id": "bflHwVKgRNE", "readable_id": "breast-anatomy-and-lactation"}, "ZoiY6ZLEKaY": {"duration": 204, "path": "khan/humanities/renaissance-reformation/northern/durer/albrecht-d-rer-self-portrait-1500/", "keywords": "", "id": "ZoiY6ZLEKaY", "title": "D\u00fcrer, Self-portrait (1500)", "description": "Albrecht D\u00fcrer, Self-Portrait, 1500 (Alte Pinakothek, Munich) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZoiY6ZLEKaY.mp4/ZoiY6ZLEKaY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZoiY6ZLEKaY.mp4/ZoiY6ZLEKaY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZoiY6ZLEKaY.m3u8/ZoiY6ZLEKaY.m3u8"}, "slug": "albrecht-d-rer-self-portrait-1500", "video_id": "ZoiY6ZLEKaY", "youtube_id": "ZoiY6ZLEKaY", "readable_id": "albrecht-d-rer-self-portrait-1500"}, "lkP-E2LUnjA": {"duration": 282, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation/inverse-variation-application/", "keywords": "u15_l3_t1_we5, Inverse, Variation, Application, CC_6_EE_2_c, CC_6_EE_9", "id": "lkP-E2LUnjA", "title": "How to solve a word problem with inverse variation (example)", "description": "Sal solves a word problem about lengths of strings and the frequency of their vibrations!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lkP-E2LUnjA.mp4/lkP-E2LUnjA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lkP-E2LUnjA.mp4/lkP-E2LUnjA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lkP-E2LUnjA.m3u8/lkP-E2LUnjA.m3u8"}, "slug": "inverse-variation-application", "video_id": "lkP-E2LUnjA", "youtube_id": "lkP-E2LUnjA", "readable_id": "inverse-variation-application"}, "UH7eOrP64q4": {"duration": 212, "path": "khan/test-prep/mcat/individuals-and-society/social-interactions/dramaturgical-approach/", "keywords": "", "id": "UH7eOrP64q4", "title": "Dramaturgical approach", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UH7eOrP64q4.mp4/UH7eOrP64q4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UH7eOrP64q4.mp4/UH7eOrP64q4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UH7eOrP64q4.m3u8/UH7eOrP64q4.m3u8"}, "slug": "dramaturgical-approach", "video_id": "UH7eOrP64q4", "youtube_id": "UH7eOrP64q4", "readable_id": "dramaturgical-approach"}, "CBEys2CTkgE": {"duration": 421, "path": "khan/test-prep/mcat/cells/cell-membrane-overview/phospholipid-structure/", "keywords": "", "id": "CBEys2CTkgE", "title": "Phospholipid structure", "description": "Learn about the detailed structure of phospholipids in the cell membrane. By Willaim Tsai.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CBEys2CTkgE.mp4/CBEys2CTkgE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CBEys2CTkgE.mp4/CBEys2CTkgE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CBEys2CTkgE.m3u8/CBEys2CTkgE.m3u8"}, "slug": "phospholipid-structure", "video_id": "CBEys2CTkgE", "youtube_id": "CBEys2CTkgE", "readable_id": "phospholipid-structure"}, "w8QRG-Xc6oU": {"duration": 352, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/part-1-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220/", "keywords": "Chartres, Gothic, Art History, Smarthistory", "id": "w8QRG-Xc6oU", "title": "Cathedral of Notre Dame de Chartres (part 1)", "description": "Part 1: Cathedral of Notre Dame de Chartres, c.1145 and 1194-c.1220 This video (1 of 3), focuses on the cathedral's pre-Gothic history, its sacred relic, and the westwerk's royal portal and jamb figures Speakers: Dr. Beth Harris and Dr. Steven Zucker For more: http://smarthistory.org/Gothic.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w8QRG-Xc6oU.mp4/w8QRG-Xc6oU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w8QRG-Xc6oU.mp4/w8QRG-Xc6oU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w8QRG-Xc6oU.m3u8/w8QRG-Xc6oU.m3u8"}, "slug": "part-1-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220", "video_id": "w8QRG-Xc6oU", "youtube_id": "w8QRG-Xc6oU", "readable_id": "part-1-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220"}, "YoHhP6a_3GY": {"duration": 158, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/bottle-rocket-apps/calvin-carter-1/", "keywords": "", "id": "YoHhP6a_3GY", "title": "A 2 a.m. wake up call", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YoHhP6a_3GY.mp4/YoHhP6a_3GY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YoHhP6a_3GY.mp4/YoHhP6a_3GY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YoHhP6a_3GY.m3u8/YoHhP6a_3GY.m3u8"}, "slug": "calvin-carter-1", "video_id": "YoHhP6a_3GY", "youtube_id": "YoHhP6a_3GY", "readable_id": "calvin-carter-1"}, "5CBs36jtZxY": {"duration": 602, "path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/ionization-energy-trends/", "keywords": "", "id": "5CBs36jtZxY", "title": "Ionization energy trends", "description": "Definition of ion and ionization energy, and trends in ionization energy across a period and down a group.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5CBs36jtZxY.mp4/5CBs36jtZxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5CBs36jtZxY.mp4/5CBs36jtZxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5CBs36jtZxY.m3u8/5CBs36jtZxY.m3u8"}, "slug": "ionization-energy-trends", "video_id": "5CBs36jtZxY", "youtube_id": "5CBs36jtZxY", "readable_id": "ionization-energy-trends"}, "CLrImGKeuEI": {"duration": 400, "path": "khan/math/algebra/quadratics/quadratic-formula/quadratic-formula-2/", "keywords": "U10_L1_T3_we2, Quadratic, Formula, CC_39336_A-REI_4", "id": "CLrImGKeuEI", "title": "Example 2: Using the quadratic formula", "description": "Quadratic Formula 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CLrImGKeuEI.mp4/CLrImGKeuEI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CLrImGKeuEI.mp4/CLrImGKeuEI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CLrImGKeuEI.m3u8/CLrImGKeuEI.m3u8"}, "slug": "quadratic-formula-2", "video_id": "CLrImGKeuEI", "youtube_id": "CLrImGKeuEI", "readable_id": "quadratic-formula-2"}, "EQvTEFCANTM": {"duration": 1023, "path": "khan/science/biology/cellular-molecular-biology/photosynthesis/photorespiration/", "keywords": "photosynthesis, calvin, photorespiration", "id": "EQvTEFCANTM", "title": "Photorespiration", "description": "More detail on the Calvin Cycle and Photorespiration", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EQvTEFCANTM.mp4/EQvTEFCANTM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EQvTEFCANTM.mp4/EQvTEFCANTM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EQvTEFCANTM.m3u8/EQvTEFCANTM.m3u8"}, "slug": "photorespiration", "video_id": "EQvTEFCANTM", "youtube_id": "EQvTEFCANTM", "readable_id": "photorespiration"}, "iDBJK0y8vb0": {"duration": 223, "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/delacroix-the-death-of-sardanapalus-1827/", "keywords": "Delacroix, Sardanapalus, Romanticism, Louvre, Eug\u00e8ne Delacroix", "id": "iDBJK0y8vb0", "title": "Delacroix, The Death of Sardanapalus", "description": "Eug\u00e8ne Delacroix, The Death of Sardanapalus, 1827, oil on canvas, 12 ft 10 in x 16 ft 3 in. (3.92 x 4.96m) (Mus\u00e9e du Louvre, Paris) Speakers: Drs. Beth Harris and Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iDBJK0y8vb0.mp4/iDBJK0y8vb0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iDBJK0y8vb0.mp4/iDBJK0y8vb0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iDBJK0y8vb0.m3u8/iDBJK0y8vb0.m3u8"}, "slug": "delacroix-the-death-of-sardanapalus-1827", "video_id": "iDBJK0y8vb0", "youtube_id": "iDBJK0y8vb0", "readable_id": "delacroix-the-death-of-sardanapalus-1827"}, "UeG_EYd-0xw": {"duration": 203, "path": "khan/math/pre-algebra/order-of-operations/arithmetic_properties/commutative-property-for-addition/", "keywords": "U09_L3_T1_we1, Commutative, Property, for, Addition, CC_1_OA_3", "id": "UeG_EYd-0xw", "title": "Commutative property for addition", "description": "Commutative Property for Addition", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UeG_EYd-0xw.mp4/UeG_EYd-0xw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UeG_EYd-0xw.mp4/UeG_EYd-0xw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UeG_EYd-0xw.m3u8/UeG_EYd-0xw.m3u8"}, "slug": "commutative-property-for-addition", "video_id": "UeG_EYd-0xw", "youtube_id": "UeG_EYd-0xw", "readable_id": "commutative-property-for-addition"}, "499MvHFrqUU": {"duration": 286, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-1-common-factors/factoring-and-the-distributive-property-2/", "keywords": "U09_L1_T1_we2, Factoring, and, the, Distributive, Property, CC_8_EE_7_b, CC_39336_A-SSE_1_a, CC_39336_A-SSE_2", "id": "499MvHFrqUU", "title": "How to factor a quadratic binomial with two variables by taking a common factor (example)", "description": "Sal factors 20u^2v - 10uv^2 as 10uv(2u-v).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/499MvHFrqUU.mp4/499MvHFrqUU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/499MvHFrqUU.mp4/499MvHFrqUU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/499MvHFrqUU.m3u8/499MvHFrqUU.m3u8"}, "slug": "factoring-and-the-distributive-property-2", "video_id": "499MvHFrqUU", "youtube_id": "499MvHFrqUU", "readable_id": "factoring-and-the-distributive-property-2"}, "Ez_-RwV9WVo": {"duration": 401, "path": "khan/math/geometry/analytic-geometry-topic/cc-distances-between-points/midpoint-formula/", "keywords": "Midpoint, Formula", "id": "Ez_-RwV9WVo", "title": "Midpoint formula", "description": "Midpoint Formula", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ez_-RwV9WVo.mp4/Ez_-RwV9WVo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ez_-RwV9WVo.mp4/Ez_-RwV9WVo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ez_-RwV9WVo.m3u8/Ez_-RwV9WVo.m3u8"}, "slug": "midpoint-formula", "video_id": "Ez_-RwV9WVo", "youtube_id": "Ez_-RwV9WVo", "readable_id": "midpoint-formula"}, "oIrnecBfHzg": {"duration": 388, "path": "khan/test-prep/mcat/cells/cytoskeleton/introduction-to-cytoskeleton/", "keywords": "", "id": "oIrnecBfHzg", "title": "Introduction to cytoskeleton", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oIrnecBfHzg.mp4/oIrnecBfHzg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oIrnecBfHzg.mp4/oIrnecBfHzg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oIrnecBfHzg.m3u8/oIrnecBfHzg.m3u8"}, "slug": "introduction-to-cytoskeleton", "video_id": "oIrnecBfHzg", "youtube_id": "oIrnecBfHzg", "readable_id": "introduction-to-cytoskeleton"}, "Vjs8uK2ovQE": {"duration": 842, "path": "khan/test-prep/mcat/physical-processes/redox-reactions/balancing-redox-reactions1/", "keywords": "redox reaction", "id": "Vjs8uK2ovQE", "title": "Balancing redox reactions in base", "description": "How to balance a redox reaction in base.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Vjs8uK2ovQE.mp4/Vjs8uK2ovQE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Vjs8uK2ovQE.mp4/Vjs8uK2ovQE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Vjs8uK2ovQE.m3u8/Vjs8uK2ovQE.m3u8"}, "slug": "balancing-redox-reactions1", "video_id": "Vjs8uK2ovQE", "youtube_id": "Vjs8uK2ovQE", "readable_id": "balancing-redox-reactions1"}, "pFFoAGIEyJc": {"duration": 191, "path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/solving-radical-equations/", "keywords": "u16_l3_t1_we1, Solving, Radical, Equations", "id": "pFFoAGIEyJc", "title": "Solving radical equations", "description": "Solving Radical Equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pFFoAGIEyJc.mp4/pFFoAGIEyJc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pFFoAGIEyJc.mp4/pFFoAGIEyJc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pFFoAGIEyJc.m3u8/pFFoAGIEyJc.m3u8"}, "slug": "solving-radical-equations", "video_id": "pFFoAGIEyJc", "youtube_id": "pFFoAGIEyJc", "readable_id": "solving-radical-equations"}, "YezsgIlcb68": {"duration": 532, "path": "khan/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation/repeated-roots-of-the-characterisitic-equations-part-2/", "keywords": "differential, equation, repeated, roots, characteristic", "id": "YezsgIlcb68", "title": "Repeated roots of the characteristic equations part 2", "description": "An example where we use initial conditions to solve a repeated-roots differential equation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YezsgIlcb68.mp4/YezsgIlcb68.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YezsgIlcb68.mp4/YezsgIlcb68.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YezsgIlcb68.m3u8/YezsgIlcb68.m3u8"}, "slug": "repeated-roots-of-the-characterisitic-equations-part-2", "video_id": "YezsgIlcb68", "youtube_id": "YezsgIlcb68", "readable_id": "repeated-roots-of-the-characterisitic-equations-part-2"}, "B0eHEo-f6fc": {"duration": 228, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/vandergoes/hugo-van-der-goes-the-adoration-of-the-kings-monforte-altar-c-1470/", "keywords": "Van der Goes, Adoration, Magi, GAP, Netherlandish, Google Art Project, Smarthistory, Khan Academy, OER, Hugo van der Goes, Adoration of the Kings, Monforte Altar, 1470, oil on oak, Gem\u00e4ldegalerie, Renaissance, Educational, art history, painting", "id": "B0eHEo-f6fc", "title": "Van der Goes, The Adoration of the Kings", "description": "Hugo van der Goes, The Adoration of the Kings (Monforte Altar), c. 1470, oil on oak, 147 x 242 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/B0eHEo-f6fc.mp4/B0eHEo-f6fc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/B0eHEo-f6fc.mp4/B0eHEo-f6fc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/B0eHEo-f6fc.m3u8/B0eHEo-f6fc.m3u8"}, "slug": "hugo-van-der-goes-the-adoration-of-the-kings-monforte-altar-c-1470", "video_id": "B0eHEo-f6fc", "youtube_id": "B0eHEo-f6fc", "readable_id": "hugo-van-der-goes-the-adoration-of-the-kings-monforte-altar-c-1470"}, "Z1RpVPbHgzU": {"duration": 148, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/digging-through-time/", "keywords": "", "id": "Z1RpVPbHgzU", "title": "Digging through time", "description": "A conversation with Dr. Darius Arya and Dr. Beth Harris.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z1RpVPbHgzU.mp4/Z1RpVPbHgzU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z1RpVPbHgzU.mp4/Z1RpVPbHgzU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z1RpVPbHgzU.m3u8/Z1RpVPbHgzU.m3u8"}, "slug": "digging-through-time", "video_id": "Z1RpVPbHgzU", "youtube_id": "Z1RpVPbHgzU", "readable_id": "digging-through-time"}, "Sh9uYq05zPk": {"duration": 631, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/allergic-rhinitis-diagnosis-and-treatment/", "keywords": "", "id": "Sh9uYq05zPk", "title": "Allergic rhinitis diagnosis and treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Sh9uYq05zPk.mp4/Sh9uYq05zPk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Sh9uYq05zPk.mp4/Sh9uYq05zPk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Sh9uYq05zPk.m3u8/Sh9uYq05zPk.m3u8"}, "slug": "allergic-rhinitis-diagnosis-and-treatment", "video_id": "Sh9uYq05zPk", "youtube_id": "Sh9uYq05zPk", "readable_id": "allergic-rhinitis-diagnosis-and-treatment"}, "YS_3XRj74oo": {"duration": 474, "path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/quadratic-inequality-example-2/", "keywords": "", "id": "YS_3XRj74oo", "title": "Quadratic inequality example 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YS_3XRj74oo.mp4/YS_3XRj74oo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YS_3XRj74oo.mp4/YS_3XRj74oo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YS_3XRj74oo.m3u8/YS_3XRj74oo.m3u8"}, "slug": "quadratic-inequality-example-2", "video_id": "YS_3XRj74oo", "youtube_id": "YS_3XRj74oo", "readable_id": "quadratic-inequality-example-2"}, "I6wzan4hNc4": {"duration": 601, "path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-stability-ii/", "keywords": "", "id": "I6wzan4hNc4", "title": "Aromatic stability II", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I6wzan4hNc4.mp4/I6wzan4hNc4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I6wzan4hNc4.mp4/I6wzan4hNc4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I6wzan4hNc4.m3u8/I6wzan4hNc4.m3u8"}, "slug": "aromatic-stability-ii", "video_id": "I6wzan4hNc4", "youtube_id": "I6wzan4hNc4", "readable_id": "aromatic-stability-ii"}, "C6anMRFCt4s": {"duration": 292, "path": "khan/science/discoveries-projects/discovery-lab-2012/khan-academy-s-discovery-lab-offers-hands-on-learning/", "keywords": "Discovery Lab, Karl Wendt, Hands-on projects,", "id": "C6anMRFCt4s", "title": "Khan Academy's Discovery Lab - Summer 2012", "description": "We ran a hands-on, project-based learning summer program in 2012. Check out the highlights!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C6anMRFCt4s.mp4/C6anMRFCt4s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C6anMRFCt4s.mp4/C6anMRFCt4s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C6anMRFCt4s.m3u8/C6anMRFCt4s.m3u8"}, "slug": "khan-academy-s-discovery-lab-offers-hands-on-learning", "video_id": "C6anMRFCt4s", "youtube_id": "C6anMRFCt4s", "readable_id": "khan-academy-s-discovery-lab-offers-hands-on-learning"}, "muqyereWEh4": {"duration": 233, "path": "khan/math/integral-calculus/sequences_series_approx_calc/seq-conv-diverg/identifying-sequence-convergence-divergence/", "keywords": "", "id": "muqyereWEh4", "title": "Identifying sequence convergence and divergence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/muqyereWEh4.mp4/muqyereWEh4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/muqyereWEh4.mp4/muqyereWEh4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/muqyereWEh4.m3u8/muqyereWEh4.m3u8"}, "slug": "identifying-sequence-convergence-divergence", "video_id": "muqyereWEh4", "youtube_id": "muqyereWEh4", "readable_id": "identifying-sequence-convergence-divergence"}, "qbCZbP6_j48": {"duration": 786, "path": "khan/science/chemistry/chem-kinetics/spectrophotometry-tutorial/spectrophotometry-introduction/", "keywords": "Spectrophotometry, Transmittance, Absorbance, Beer-Lambert, Law", "id": "qbCZbP6_j48", "title": "Spectrophotometry introduction", "description": "Spectrophotometry, transmittance, absorbance and the Beer-Lambert Law", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qbCZbP6_j48.mp4/qbCZbP6_j48.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qbCZbP6_j48.mp4/qbCZbP6_j48.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qbCZbP6_j48.m3u8/qbCZbP6_j48.m3u8"}, "slug": "spectrophotometry-introduction", "video_id": "qbCZbP6_j48", "youtube_id": "qbCZbP6_j48", "readable_id": "spectrophotometry-introduction"}, "prWSGbDW3LU": {"duration": 438, "path": "khan/partner-content/wi-phi/value-theory-1/problem-of-evil-part-2/", "keywords": "", "id": "prWSGbDW3LU", "title": "Ethics: Problem of Evil, Part 2", "description": "Part 2 of a trilogy. Here, Greg gives a response to the deductive version of the Problem of Evil on behalf of someone who believes that God exists. In thinking about this response, we need to think about whether God can make contradictions true, and whether God can have good reasons for allowing bad things to happen.\n\nSpeaker: Dr.\u00a0Greg Ganssle, Senior Fellow, Rivendell Institute, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/prWSGbDW3LU.mp4/prWSGbDW3LU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/prWSGbDW3LU.mp4/prWSGbDW3LU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/prWSGbDW3LU.m3u8/prWSGbDW3LU.m3u8"}, "slug": "problem-of-evil-part-2", "video_id": "prWSGbDW3LU", "youtube_id": "prWSGbDW3LU", "readable_id": "problem-of-evil-part-2"}, "pj1VvscsV0s": {"duration": 215, "path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/where-a-function-is-not-differentiable/", "keywords": "", "id": "pj1VvscsV0s", "title": "Where a function is not differentiable", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pj1VvscsV0s.mp4/pj1VvscsV0s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pj1VvscsV0s.mp4/pj1VvscsV0s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pj1VvscsV0s.m3u8/pj1VvscsV0s.m3u8"}, "slug": "where-a-function-is-not-differentiable", "video_id": "pj1VvscsV0s", "youtube_id": "pj1VvscsV0s", "readable_id": "where-a-function-is-not-differentiable"}, "4roG0EhmyDw": {"duration": 236, "path": "khan/humanities/art-asia/art-japan/muromachi-period/tearoom-at-the-asian/", "keywords": "", "id": "4roG0EhmyDw", "title": "Teahouse at the Asian Art Museum", "description": "The Asian Art Museum\u2019s teahouse was designed by architect Osamu Sato as a functioning teahouse, as well as a display case. It is a three and three-quarters (sanjo daime) mat room. It is complete with an alcove for the display of a scroll and flowers, an electric-powered sunken hearth used in winter for the hot water kettle, and a functioning preparation area (mizuya) with fresh running water and drain. Its three interior ceiling levels display three different ceiling treatments.\u00a0 The teahouse has a sliding glass front that opens fully when in use for live tea demonstrations, but secures the space as a display case when not in use. It was constructed in Kyoto by the distinguished firm Nakamura Sotoji Komuten, long famous for refined traditional Japanese architecture built by specially trained, artisan carpenters and craftsmen. In September 2002, the teahouse was installed in the museum\u2019s second-floor collections gallery devoted to Japanese art. Four carpenters came from Kyoto to construct the teahouse and apply the final wall finishes. Learn more about this teahouse on the Asian Art Museum's education website.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4roG0EhmyDw.mp4/4roG0EhmyDw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4roG0EhmyDw.mp4/4roG0EhmyDw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4roG0EhmyDw.m3u8/4roG0EhmyDw.m3u8"}, "slug": "tearoom-at-the-asian", "video_id": "4roG0EhmyDw", "youtube_id": "4roG0EhmyDw", "readable_id": "tearoom-at-the-asian"}, "NgsuPTLkPgs": {"duration": 519, "path": "khan/test-prep/mcat/chemical-processes/separations-purifications/extractions/", "keywords": "extraction", "id": "NgsuPTLkPgs", "title": "Extractions", "description": "Learn about how chemicals can be separated through acid-base extraction. By Angela Guerrero.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NgsuPTLkPgs.mp4/NgsuPTLkPgs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NgsuPTLkPgs.mp4/NgsuPTLkPgs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NgsuPTLkPgs.m3u8/NgsuPTLkPgs.m3u8"}, "slug": "extractions", "video_id": "NgsuPTLkPgs", "youtube_id": "NgsuPTLkPgs", "readable_id": "extractions"}, "NigP3DjV3NY": {"duration": 309, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/degas-the-dance-class-1874/", "keywords": "Edgar Degas, art history, Smarthistory, Impressionism, Ballet", "id": "NigP3DjV3NY", "title": "Degas, The Dance Class", "description": "Edgar Degas, The Dance Class, oil on canvas, 1874 (Metropolitan Museum of Art) Speakers: Dr. Steven Zucker, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NigP3DjV3NY.mp4/NigP3DjV3NY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NigP3DjV3NY.mp4/NigP3DjV3NY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NigP3DjV3NY.m3u8/NigP3DjV3NY.m3u8"}, "slug": "degas-the-dance-class-1874", "video_id": "NigP3DjV3NY", "youtube_id": "NigP3DjV3NY", "readable_id": "degas-the-dance-class-1874"}, "DkZnevdbf0A": {"duration": 115, "path": "khan/math/geometry/intro_euclid/drawing-lines-exercise-example/", "keywords": "", "id": "DkZnevdbf0A", "title": "Drawing line segments example", "description": "Let's put our new knowledge of line segments to use in this example problem. We'll help you!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DkZnevdbf0A.mp4/DkZnevdbf0A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DkZnevdbf0A.mp4/DkZnevdbf0A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DkZnevdbf0A.m3u8/DkZnevdbf0A.m3u8"}, "slug": "drawing-lines-exercise-example", "video_id": "DkZnevdbf0A", "youtube_id": "DkZnevdbf0A", "readable_id": "drawing-lines-exercise-example"}, "ZgDIX2GOaxQ": {"duration": 813, "path": "khan/test-prep/mcat/physical-processes/electrostatics-1/conductors-and-insulators/", "keywords": "", "id": "ZgDIX2GOaxQ", "title": "Conductors and Insulators", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZgDIX2GOaxQ.mp4/ZgDIX2GOaxQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZgDIX2GOaxQ.mp4/ZgDIX2GOaxQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZgDIX2GOaxQ.m3u8/ZgDIX2GOaxQ.m3u8"}, "slug": "conductors-and-insulators", "video_id": "ZgDIX2GOaxQ", "youtube_id": "ZgDIX2GOaxQ", "readable_id": "conductors-and-insulators"}, "fY_ejjMRYg0": {"duration": 505, "path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/acetals-as-protecting-groups-and-thioacetals/", "keywords": "", "id": "fY_ejjMRYg0", "title": "Acetals as protecting groups and thioacetals", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fY_ejjMRYg0.mp4/fY_ejjMRYg0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fY_ejjMRYg0.mp4/fY_ejjMRYg0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fY_ejjMRYg0.m3u8/fY_ejjMRYg0.m3u8"}, "slug": "acetals-as-protecting-groups-and-thioacetals", "video_id": "fY_ejjMRYg0", "youtube_id": "fY_ejjMRYg0", "readable_id": "acetals-as-protecting-groups-and-thioacetals"}, "7IkufOBIw5g": {"duration": 532, "path": "khan/math/integral-calculus/integration-techniques/integrate-partial-fraction-expan/partial-fraction-expansion-to-integrate/", "keywords": "", "id": "7IkufOBIw5g", "title": "Partial fraction expansion to evaluate integral", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7IkufOBIw5g.mp4/7IkufOBIw5g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7IkufOBIw5g.mp4/7IkufOBIw5g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7IkufOBIw5g.m3u8/7IkufOBIw5g.m3u8"}, "slug": "partial-fraction-expansion-to-integrate", "video_id": "7IkufOBIw5g", "youtube_id": "7IkufOBIw5g", "readable_id": "partial-fraction-expansion-to-integrate"}, "yb7lVnY_VCY": {"duration": 155, "path": "khan/math/pre-algebra/fractions-pre-alg/dividing-fractions-pre-alg/dividing-a-fraction-by-a-whole-number-word-problem/", "keywords": "", "id": "yb7lVnY_VCY", "title": "Dividing whole numbers and fractions: studying", "description": "Solve a word problem by dividing a fraction by a whole number. The example used in this video is 1/5 \u00f7 4.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yb7lVnY_VCY.mp4/yb7lVnY_VCY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yb7lVnY_VCY.mp4/yb7lVnY_VCY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yb7lVnY_VCY.m3u8/yb7lVnY_VCY.m3u8"}, "slug": "dividing-a-fraction-by-a-whole-number-word-problem", "video_id": "yb7lVnY_VCY", "youtube_id": "yb7lVnY_VCY", "readable_id": "dividing-a-fraction-by-a-whole-number-word-problem"}, "3FManXv4mZM": {"duration": 307, "path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/proof-rhombus-area-half-product-of-diagonal-length/", "keywords": "geometry", "id": "3FManXv4mZM", "title": "Proof: Rhombus area is half the product of the lengths of its diagonals", "description": "Sal proves that we can find the area of a rhombus by taking half the product of the lengths of the diagonals.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3FManXv4mZM.mp4/3FManXv4mZM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3FManXv4mZM.mp4/3FManXv4mZM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3FManXv4mZM.m3u8/3FManXv4mZM.m3u8"}, "slug": "proof-rhombus-area-half-product-of-diagonal-length", "video_id": "3FManXv4mZM", "youtube_id": "3FManXv4mZM", "readable_id": "proof-rhombus-area-half-product-of-diagonal-length"}, "EMyHmzVOgbM": {"duration": 141, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-5-distance-between-points/", "keywords": "", "id": "EMyHmzVOgbM", "title": "5 Distance between points", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EMyHmzVOgbM.mp4/EMyHmzVOgbM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EMyHmzVOgbM.mp4/EMyHmzVOgbM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EMyHmzVOgbM.m3u8/EMyHmzVOgbM.m3u8"}, "slug": "sat-5-distance-between-points", "video_id": "EMyHmzVOgbM", "youtube_id": "EMyHmzVOgbM", "readable_id": "sat-5-distance-between-points"}, "Ip6hmC2KIug": {"duration": 299, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/phidias-sculpture-from-the-east-pediment-of-the-parthenon-c-448-432-b-c-e/", "keywords": "Parthenon, pediment, athens, acropolis, Smarthistory, art history, art, sculpture, Greece, classical, Classical antiquity", "id": "Ip6hmC2KIug", "title": "East Pediment sculptures, Parthenon, including Helios, Horses and Dionysus (Heracles?)", "description": "Phidias (?), Sculpture from the East Pediment of the Parthenon, marble, c. 448-432 B.C.E., Classical Period (British Museum, London). Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ip6hmC2KIug.mp4/Ip6hmC2KIug.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ip6hmC2KIug.mp4/Ip6hmC2KIug.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ip6hmC2KIug.m3u8/Ip6hmC2KIug.m3u8"}, "slug": "phidias-sculpture-from-the-east-pediment-of-the-parthenon-c-448-432-b-c-e", "video_id": "Ip6hmC2KIug", "youtube_id": "Ip6hmC2KIug", "readable_id": "phidias-sculpture-from-the-east-pediment-of-the-parthenon-c-448-432-b-c-e"}, "LyIZEnGYCI8": {"duration": 207, "path": "khan/math/algebra/introduction-to-algebra/units-algebra/mileage-assumption-example/", "keywords": "", "id": "LyIZEnGYCI8", "title": "Mileage assumption example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LyIZEnGYCI8.mp4/LyIZEnGYCI8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LyIZEnGYCI8.mp4/LyIZEnGYCI8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LyIZEnGYCI8.m3u8/LyIZEnGYCI8.m3u8"}, "slug": "mileage-assumption-example", "video_id": "LyIZEnGYCI8", "youtube_id": "LyIZEnGYCI8", "readable_id": "mileage-assumption-example"}, "jMRYMRzowCI": {"duration": 214, "path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models/sscc-blended-flex/", "keywords": "", "id": "jMRYMRzowCI", "title": "The Flex Model", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jMRYMRzowCI.mp4/jMRYMRzowCI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jMRYMRzowCI.mp4/jMRYMRzowCI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jMRYMRzowCI.m3u8/jMRYMRzowCI.m3u8"}, "slug": "sscc-blended-flex", "video_id": "jMRYMRzowCI", "youtube_id": "jMRYMRzowCI", "readable_id": "sscc-blended-flex"}, "stYBg9zqgLs": {"duration": 269, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h7-harder/", "keywords": "", "id": "stYBg9zqgLs", "title": "Solving systems of linear equations \u2014 Harder example", "description": "Watch Sal work through a harder Solving systems of linear equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/stYBg9zqgLs.mp4/stYBg9zqgLs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/stYBg9zqgLs.mp4/stYBg9zqgLs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/stYBg9zqgLs.m3u8/stYBg9zqgLs.m3u8"}, "slug": "sat-math-h7-harder", "video_id": "stYBg9zqgLs", "youtube_id": "stYBg9zqgLs", "readable_id": "sat-math-h7-harder"}, "Rk8dCnKIfP4": {"duration": 763, "path": "khan/humanities/history/1600s-1800s/declaration-of-independence/birth-of-the-us-constitution/", "keywords": "", "id": "Rk8dCnKIfP4", "title": "Birth of the US Constitution", "description": "In this video, Aspen Institute President and CEO Walter Isaacson\u00a0talks to Sal about \u00a0the Declaration of Independence.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Rk8dCnKIfP4.mp4/Rk8dCnKIfP4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Rk8dCnKIfP4.mp4/Rk8dCnKIfP4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Rk8dCnKIfP4.m3u8/Rk8dCnKIfP4.m3u8"}, "slug": "birth-of-the-us-constitution", "video_id": "Rk8dCnKIfP4", "youtube_id": "Rk8dCnKIfP4", "readable_id": "birth-of-the-us-constitution"}, "f-wz_ZzSDdg": {"duration": 292, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions/multiplying-and-dividing-rational-expressions-2/", "keywords": "U11_L1_T2_we2, Multiplying, and, Dividing, Rational, Expressions, CC_39336_A-APR_6, CC_39336_A-APR_7", "id": "f-wz_ZzSDdg", "title": "How to multiply rational expressions with polynomial numerators and denominators (example)", "description": "Sal performs the following multiplication and simplifies the result: (a^2-4)/(a^2-1) X (a+1)/(a+2).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/f-wz_ZzSDdg.mp4/f-wz_ZzSDdg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/f-wz_ZzSDdg.mp4/f-wz_ZzSDdg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/f-wz_ZzSDdg.m3u8/f-wz_ZzSDdg.m3u8"}, "slug": "multiplying-and-dividing-rational-expressions-2", "video_id": "f-wz_ZzSDdg", "youtube_id": "f-wz_ZzSDdg", "readable_id": "multiplying-and-dividing-rational-expressions-2"}, "mwUyaeWxJhA": {"duration": 397, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/firestick-farming/", "keywords": "farming, agriculture, firestick, aborigines", "id": "mwUyaeWxJhA", "title": "Firestick farming", "description": "How the indigenous Australians used fire to change their environment", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mwUyaeWxJhA.mp4/mwUyaeWxJhA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mwUyaeWxJhA.mp4/mwUyaeWxJhA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mwUyaeWxJhA.m3u8/mwUyaeWxJhA.m3u8"}, "slug": "firestick-farming", "video_id": "mwUyaeWxJhA", "youtube_id": "mwUyaeWxJhA", "readable_id": "firestick-farming"}, "AhgR3X--bbY": {"duration": 255, "path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/tax-brackets-and-progressive-taxation/", "keywords": "", "id": "AhgR3X--bbY", "title": "Tax brackets and progressive taxation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AhgR3X--bbY.mp4/AhgR3X--bbY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AhgR3X--bbY.mp4/AhgR3X--bbY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AhgR3X--bbY.m3u8/AhgR3X--bbY.m3u8"}, "slug": "tax-brackets-and-progressive-taxation", "video_id": "AhgR3X--bbY", "youtube_id": "AhgR3X--bbY", "readable_id": "tax-brackets-and-progressive-taxation"}, "c4fUaD4g4mc": {"duration": 93, "path": "khan/math/pre-algebra/decimals-pre-alg/adding-decimals-pre-alg/adding-decimals-word-problem/", "keywords": "", "id": "c4fUaD4g4mc", "title": "Adding decimals word problem", "description": "Here's a simple word problem asking us to put our adding decimals skill to work. We sound like a broken record, but be sure and ALIGN DECIMALS.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/c4fUaD4g4mc.mp4/c4fUaD4g4mc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/c4fUaD4g4mc.mp4/c4fUaD4g4mc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/c4fUaD4g4mc.m3u8/c4fUaD4g4mc.m3u8"}, "slug": "adding-decimals-word-problem", "video_id": "c4fUaD4g4mc", "youtube_id": "c4fUaD4g4mc", "readable_id": "adding-decimals-word-problem"}, "8ZlH2JswO3Q": {"duration": 319, "path": "khan/humanities/monarchy-enlightenment/rococo/watteau-cythera/", "keywords": "", "id": "8ZlH2JswO3Q", "title": "Antoine Watteau, Pilgrimage to Cythera", "description": "\u200bAntoine Watteau, Pilgrimage to Cythera, 1717, oil on canvas, 4' 3\" x 6' 4 1/2\" (Louvre, Paris).\n\u00a0oil on canvas, 4' 3\" x 6' 4 1/2\" (Louvre, Paris).\u00a0\u200bSpeakers: \u00a0Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8ZlH2JswO3Q.mp4/8ZlH2JswO3Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8ZlH2JswO3Q.mp4/8ZlH2JswO3Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8ZlH2JswO3Q.m3u8/8ZlH2JswO3Q.m3u8"}, "slug": "watteau-cythera", "video_id": "8ZlH2JswO3Q", "youtube_id": "8ZlH2JswO3Q", "readable_id": "watteau-cythera"}, "3kQ_p2EZX4Q": {"duration": 519, "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/celebrity-art-leonardo-s-mona-lisa/", "keywords": "", "id": "3kQ_p2EZX4Q", "title": "Leonardo, Mona Lisa", "description": "Salman Khan and Beth Harris discuss Leonardo da Vinci's painting, \"Mona Lisa,\" as a symbol of Western culture and as a renaissance portrait.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3kQ_p2EZX4Q.mp4/3kQ_p2EZX4Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3kQ_p2EZX4Q.mp4/3kQ_p2EZX4Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3kQ_p2EZX4Q.m3u8/3kQ_p2EZX4Q.m3u8"}, "slug": "celebrity-art-leonardo-s-mona-lisa", "video_id": "3kQ_p2EZX4Q", "youtube_id": "3kQ_p2EZX4Q", "readable_id": "celebrity-art-leonardo-s-mona-lisa"}, "HjBfBB9r2QM": {"duration": 402, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/santa-sabina-rome/", "keywords": "Rome, church, architecture, Early Christian, basilica, Aventine Hill", "id": "HjBfBB9r2QM", "title": "Basilica of Santa Sabina, Rome", "description": "Basilica of Santa Sabina, 422-432, Rome Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HjBfBB9r2QM.mp4/HjBfBB9r2QM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HjBfBB9r2QM.mp4/HjBfBB9r2QM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HjBfBB9r2QM.m3u8/HjBfBB9r2QM.m3u8"}, "slug": "santa-sabina-rome", "video_id": "HjBfBB9r2QM", "youtube_id": "HjBfBB9r2QM", "readable_id": "santa-sabina-rome"}, "Eo21CfNJfCs": {"duration": 184, "path": "khan/partner-content/pixar/crowds/crowds2/combinatorics11/", "keywords": "", "id": "Eo21CfNJfCs", "title": "6. Binomial coefficient", "description": "Let's put everything together. Get ready for a really powerful formula: the binomial coefficient (warning: you may need to watch this a few times!)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Eo21CfNJfCs.mp4/Eo21CfNJfCs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Eo21CfNJfCs.mp4/Eo21CfNJfCs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Eo21CfNJfCs.m3u8/Eo21CfNJfCs.m3u8"}, "slug": "combinatorics11", "video_id": "Eo21CfNJfCs", "youtube_id": "Eo21CfNJfCs", "readable_id": "combinatorics11"}, "6fHorNn2zqQ": {"duration": 382, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/monet-les-nymph-as-the-water-lilies-1918-26/", "keywords": "Monet, Water Lilies, Orangerie, Paris, Impressionism, Smarthistory, Art History, Claude Monet painting", "id": "6fHorNn2zqQ", "title": "Monet, Water Lilies", "description": "Claude Monet, Les Nymph\u00e9as (The Water Lilies), suite of paintings on permanent exhibition at the Mus\u00e9e de l'Orangerie in Paris: Room 1: Morning, oil on two canvas panels, 200 x 425 cm, c. 1918-26 Clouds, oil on three canvas panels, 200 x 1275 cm, c. 1918-26 Green Highlights, oil on two canvas panels, 200 x 850 cm, c. 1918-26 Sunset, oil on canvas, 200 x 600 cm, c. 1918-26 Room 2: Reflection of Trees, oil on two canvas panels, 200 x 850 cm, c. 1918-26 The Morning Light, the willows, oil on three canvas panels, 200 x 1275 cm, c. 1918-26 The Morning Willows, oil on three canvas panels, 200 x 1275 cm, c. 1918-26 The Two Willows, oil on four canvas panels, 200 x 1700 cm, c. 1918-26 Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6fHorNn2zqQ.mp4/6fHorNn2zqQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6fHorNn2zqQ.mp4/6fHorNn2zqQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6fHorNn2zqQ.m3u8/6fHorNn2zqQ.m3u8"}, "slug": "monet-les-nymph-as-the-water-lilies-1918-26", "video_id": "6fHorNn2zqQ", "youtube_id": "6fHorNn2zqQ", "readable_id": "monet-les-nymph-as-the-water-lilies-1918-26"}, "LG6g7gxupHg": {"duration": 255, "path": "khan/math/algebra2/manipulating-functions/combining-and-composing-modeling-functions/modeling-with-composite-functions/", "keywords": "", "id": "LG6g7gxupHg", "title": "How to model a complex situation by composing two basic modeling functions (example)", "description": "Given the formula of the volume of fuel in a tank as a function of its depth, and the formula of the depth as a function of time, Sal finds the formula of the volume as a function of time, by using function composition.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LG6g7gxupHg.mp4/LG6g7gxupHg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LG6g7gxupHg.mp4/LG6g7gxupHg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LG6g7gxupHg.m3u8/LG6g7gxupHg.m3u8"}, "slug": "modeling-with-composite-functions", "video_id": "LG6g7gxupHg", "youtube_id": "LG6g7gxupHg", "readable_id": "modeling-with-composite-functions"}, "PxAHbuyBvBY": {"duration": 610, "path": "khan/partner-content/cas-biodiversity/biodiversity-protection/biodiversitychampions/protecting-biodiversity-the-power-of-the-individual/", "keywords": "", "id": "PxAHbuyBvBY", "title": "Protecting biodiversity: the power of the individual", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PxAHbuyBvBY.mp4/PxAHbuyBvBY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PxAHbuyBvBY.mp4/PxAHbuyBvBY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PxAHbuyBvBY.m3u8/PxAHbuyBvBY.m3u8"}, "slug": "protecting-biodiversity-the-power-of-the-individual", "video_id": "PxAHbuyBvBY", "youtube_id": "PxAHbuyBvBY", "readable_id": "protecting-biodiversity-the-power-of-the-individual"}, "GtaoP0skPWc": {"duration": 596, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/interest-basics-tutorial/introduction-to-interest/", "keywords": "math, finance, interest, simple, compound, CC_7_RP_3, CC_39336_A-SSE_3_c", "id": "GtaoP0skPWc", "title": "Introduction to interest", "description": "What interest is. Simple versus compound interest.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GtaoP0skPWc.mp4/GtaoP0skPWc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GtaoP0skPWc.mp4/GtaoP0skPWc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GtaoP0skPWc.m3u8/GtaoP0skPWc.m3u8"}, "slug": "introduction-to-interest", "video_id": "GtaoP0skPWc", "youtube_id": "GtaoP0skPWc", "readable_id": "introduction-to-interest"}, "eqC8gVxxB-s": {"duration": 232, "path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/saint-matthew-from-the-ebbo-gospel/", "keywords": "", "id": "eqC8gVxxB-s", "title": "Saint Matthew from the Ebbo Gospel", "description": "Saint Matthew, folio 18 verso of the Ebbo Gospels (Gospel Book of the Archbishop of Reims) from Hautvillers, France, c. 816-35, ink and tempera on vellum, 10 1/4 x 8 1/4 (Biblioth\u00e8que Municipale, \u00c9pernay) Speakers: Dr. Nancy Ross and Jennifer Freeman", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eqC8gVxxB-s.mp4/eqC8gVxxB-s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eqC8gVxxB-s.mp4/eqC8gVxxB-s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eqC8gVxxB-s.m3u8/eqC8gVxxB-s.m3u8"}, "slug": "saint-matthew-from-the-ebbo-gospel", "video_id": "eqC8gVxxB-s", "youtube_id": "eqC8gVxxB-s", "readable_id": "saint-matthew-from-the-ebbo-gospel"}, "NCF4m8BDs7w": {"duration": 283, "path": "khan/math/integral-calculus/solid_revolution_topic/function-average-value/average-function-value-closed-interval/", "keywords": "", "id": "NCF4m8BDs7w", "title": "Average value of a function over a closed interval", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NCF4m8BDs7w.mp4/NCF4m8BDs7w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NCF4m8BDs7w.mp4/NCF4m8BDs7w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NCF4m8BDs7w.m3u8/NCF4m8BDs7w.m3u8"}, "slug": "average-function-value-closed-interval", "video_id": "NCF4m8BDs7w", "youtube_id": "NCF4m8BDs7w", "readable_id": "average-function-value-closed-interval"}, "IKsi-DQU2zo": {"duration": 276, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/adding-and-subtracting-rational-expressions-3/", "keywords": "U11_L1_T3_we3, Adding, and, Subtracting, Rational, Expressions, CC_39336_A-APR_7", "id": "IKsi-DQU2zo", "title": "How to subtract rational expressions by finding the least common multiple (example)", "description": "Sal performs the following subtraction and simplifies the result: (a-2)/(a+2) - (a-3)/(a^2+4a+4).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IKsi-DQU2zo.mp4/IKsi-DQU2zo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IKsi-DQU2zo.mp4/IKsi-DQU2zo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IKsi-DQU2zo.m3u8/IKsi-DQU2zo.m3u8"}, "slug": "adding-and-subtracting-rational-expressions-3", "video_id": "IKsi-DQU2zo", "youtube_id": "IKsi-DQU2zo", "readable_id": "adding-and-subtracting-rational-expressions-3"}, "gvjFMvLVnG0": {"duration": 347, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments/violin-interview-and-demonstration-with-concertmaster-david-kim/", "keywords": "", "id": "gvjFMvLVnG0", "title": "Violin: Interview and demonstration with concertmaster David Kim", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gvjFMvLVnG0.mp4/gvjFMvLVnG0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gvjFMvLVnG0.mp4/gvjFMvLVnG0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gvjFMvLVnG0.m3u8/gvjFMvLVnG0.m3u8"}, "slug": "violin-interview-and-demonstration-with-concertmaster-david-kim", "video_id": "gvjFMvLVnG0", "youtube_id": "gvjFMvLVnG0", "readable_id": "violin-interview-and-demonstration-with-concertmaster-david-kim"}, "NCu83PcEQ1U": {"duration": 332, "path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/giovanni-bellini-san-zaccaria-altarpiece-1505/", "keywords": "Bellini, San Zaccaria Altarpiece, 1505, Venice, Renaissance, art, painting", "id": "NCu83PcEQ1U", "title": "Giovanni Bellini, San Zaccaria Altarpiece", "description": "Giovanni Bellini, San Zaccaria Altarpiece, 1505, oil on wood transferred to canvas, 16 feet 5-1/2 inches x 7 feet 9 inches (San Zaccaria, Venice). Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NCu83PcEQ1U.mp4/NCu83PcEQ1U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NCu83PcEQ1U.mp4/NCu83PcEQ1U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NCu83PcEQ1U.m3u8/NCu83PcEQ1U.m3u8"}, "slug": "giovanni-bellini-san-zaccaria-altarpiece-1505", "video_id": "NCu83PcEQ1U", "youtube_id": "NCu83PcEQ1U", "readable_id": "giovanni-bellini-san-zaccaria-altarpiece-1505"}, "TvUCe6Bomy4": {"duration": 207, "path": "khan/math/algebra/linear_inequalities/compound_absolute_value_inequali/absolute-value-inequalities-example-1/", "keywords": "U05_L1_T2_we1, Absolute, value, inequalities", "id": "TvUCe6Bomy4", "title": "Absolute value inequalities example 1", "description": "Absolute value inequalities, graph solution on number line", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TvUCe6Bomy4.mp4/TvUCe6Bomy4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TvUCe6Bomy4.mp4/TvUCe6Bomy4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TvUCe6Bomy4.m3u8/TvUCe6Bomy4.m3u8"}, "slug": "absolute-value-inequalities-example-1", "video_id": "TvUCe6Bomy4", "youtube_id": "TvUCe6Bomy4", "readable_id": "absolute-value-inequalities-example-1"}, "RycF0ub2Al0": {"duration": 287, "path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/hormone-concentration-metabolism-negative-feedback/", "keywords": "hormone, metabolism, negative feedback", "id": "RycF0ub2Al0", "title": "Hormone concentration metabolism and negative feedback", "description": "In this video we're going to learn about how the concentration of hormones in our blood is regulated. By Ryan Patton.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RycF0ub2Al0.mp4/RycF0ub2Al0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RycF0ub2Al0.mp4/RycF0ub2Al0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RycF0ub2Al0.m3u8/RycF0ub2Al0.m3u8"}, "slug": "hormone-concentration-metabolism-negative-feedback", "video_id": "RycF0ub2Al0", "youtube_id": "RycF0ub2Al0", "readable_id": "hormone-concentration-metabolism-negative-feedback"}, "xgsbxmiPOrg": {"duration": 670, "path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/treating-depression-with-antidepressants/", "keywords": "Depression (Symptom),Refractory Depression (Disease Or Medical Condition),Antidepressant (Medical Treatment),Health (Industry)", "id": "xgsbxmiPOrg", "title": "Treating depression with antidepressants", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xgsbxmiPOrg.mp4/xgsbxmiPOrg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xgsbxmiPOrg.mp4/xgsbxmiPOrg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xgsbxmiPOrg.m3u8/xgsbxmiPOrg.m3u8"}, "slug": "treating-depression-with-antidepressants", "video_id": "xgsbxmiPOrg", "youtube_id": "xgsbxmiPOrg", "readable_id": "treating-depression-with-antidepressants"}, "GPomGcZ3_kk": {"duration": 847, "path": "khan/test-prep/mcat/physical-processes/thin-lenses/multiple-lens-systems/", "keywords": "", "id": "GPomGcZ3_kk", "title": "Multiple lens systems", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GPomGcZ3_kk.mp4/GPomGcZ3_kk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GPomGcZ3_kk.mp4/GPomGcZ3_kk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GPomGcZ3_kk.m3u8/GPomGcZ3_kk.m3u8"}, "slug": "multiple-lens-systems", "video_id": "GPomGcZ3_kk", "youtube_id": "GPomGcZ3_kk", "readable_id": "multiple-lens-systems"}, "_3BnyEr5fG4": {"duration": 516, "path": "khan/math/precalculus/seq_induction/seq-and-series/equations-of-sequence-patterns/", "keywords": "U03_L1_T2_we1, Equations, of, Sequence, Patterns, CC_6_EE_5, CC_6_EE_6, CC_39336_F-BF_2", "id": "_3BnyEr5fG4", "title": "Equations of sequence patterns", "description": "Equations of Sequence Patterns", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_3BnyEr5fG4.mp4/_3BnyEr5fG4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_3BnyEr5fG4.mp4/_3BnyEr5fG4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_3BnyEr5fG4.m3u8/_3BnyEr5fG4.m3u8"}, "slug": "equations-of-sequence-patterns", "video_id": "_3BnyEr5fG4", "youtube_id": "_3BnyEr5fG4", "readable_id": "equations-of-sequence-patterns"}, "kkpVr5eoyVE": {"duration": 2862, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/sean-osullivan/", "keywords": "", "id": "kkpVr5eoyVE", "title": "Sean O'Sullivan - Founder of SOSventures", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kkpVr5eoyVE.mp4/kkpVr5eoyVE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kkpVr5eoyVE.mp4/kkpVr5eoyVE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kkpVr5eoyVE.m3u8/kkpVr5eoyVE.m3u8"}, "slug": "sean-osullivan", "video_id": "kkpVr5eoyVE", "youtube_id": "kkpVr5eoyVE", "readable_id": "sean-osullivan"}, "pkGrXzakRFs": {"duration": 304, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/sum-of-logarithms-with-same-base/", "keywords": "u18_l2_t2_we1, Sum, of, Logarithms, with, Same, Base", "id": "pkGrXzakRFs", "title": "Sum of logarithms with same base", "description": "Sum of Logarithms with Same Base", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pkGrXzakRFs.mp4/pkGrXzakRFs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pkGrXzakRFs.mp4/pkGrXzakRFs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pkGrXzakRFs.m3u8/pkGrXzakRFs.m3u8"}, "slug": "sum-of-logarithms-with-same-base", "video_id": "pkGrXzakRFs", "youtube_id": "pkGrXzakRFs", "readable_id": "sum-of-logarithms-with-same-base"}, "FaKB7Y2gL9Y": {"duration": 426, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/inflammatory-bowel-disease-rn/inflammatory-bowel-disease-vs-irritable-bowel-disease/", "keywords": "Irritable Bowel Syndrome (Disease Or Medical Condition),Disease (Cause Of Death),Inflammatory Bowel Disease (Disease Or Medical Condition),Large Intestine (Anatomical Structure),Inflammation (Symptom)", "id": "FaKB7Y2gL9Y", "title": "Inflammatory bowel disease vs irritable bowel disease", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FaKB7Y2gL9Y.mp4/FaKB7Y2gL9Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FaKB7Y2gL9Y.mp4/FaKB7Y2gL9Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FaKB7Y2gL9Y.m3u8/FaKB7Y2gL9Y.m3u8"}, "slug": "inflammatory-bowel-disease-vs-irritable-bowel-disease", "video_id": "FaKB7Y2gL9Y", "youtube_id": "FaKB7Y2gL9Y", "readable_id": "inflammatory-bowel-disease-vs-irritable-bowel-disease"}, "F-zRXHAo4-U": {"duration": 166, "path": "khan/science/biology/her/tree-of-life/human-prehistory-101-epilogue/", "keywords": "Khan, prehistory, epilogue", "id": "F-zRXHAo4-U", "title": "Human prehistory 101: Epilogue", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F-zRXHAo4-U.mp4/F-zRXHAo4-U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F-zRXHAo4-U.mp4/F-zRXHAo4-U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F-zRXHAo4-U.m3u8/F-zRXHAo4-U.m3u8"}, "slug": "human-prehistory-101-epilogue", "video_id": "F-zRXHAo4-U", "youtube_id": "F-zRXHAo4-U", "readable_id": "human-prehistory-101-epilogue"}, "pIDmePznLBo": {"duration": 471, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-gastroenteritis/", "keywords": "Gastroenteritis (Disease Or Medical Condition),Health (Industry)", "id": "pIDmePznLBo", "title": "What is gastroenteritis?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pIDmePznLBo.mp4/pIDmePznLBo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pIDmePznLBo.mp4/pIDmePznLBo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pIDmePznLBo.m3u8/pIDmePznLBo.m3u8"}, "slug": "what-is-gastroenteritis", "video_id": "pIDmePznLBo", "youtube_id": "pIDmePznLBo", "readable_id": "what-is-gastroenteritis"}, "86nb02Bx_5w": {"duration": 504, "path": "khan/math/probability/random-variables-topic/expected-value/expected-value-wager/", "keywords": "", "id": "86nb02Bx_5w", "title": "Expected value while fishing", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/86nb02Bx_5w.mp4/86nb02Bx_5w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/86nb02Bx_5w.mp4/86nb02Bx_5w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/86nb02Bx_5w.m3u8/86nb02Bx_5w.m3u8"}, "slug": "expected-value-wager", "video_id": "86nb02Bx_5w", "youtube_id": "86nb02Bx_5w", "readable_id": "expected-value-wager"}, "yHo0CcDVHsk": {"duration": 322, "path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/trig-function-equation/", "keywords": "", "id": "yHo0CcDVHsk", "title": "Determining the equation of a trig function", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yHo0CcDVHsk.mp4/yHo0CcDVHsk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yHo0CcDVHsk.mp4/yHo0CcDVHsk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yHo0CcDVHsk.m3u8/yHo0CcDVHsk.m3u8"}, "slug": "trig-function-equation", "video_id": "yHo0CcDVHsk", "youtube_id": "yHo0CcDVHsk", "readable_id": "trig-function-equation"}, "zNtbi4OJs9I": {"duration": 157, "path": "khan/math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl/example-using-algebra-to-find-measure-of-supplementary-angles/", "keywords": "", "id": "zNtbi4OJs9I", "title": "Find measure of supplementary angles", "description": "Watch and understand how to find the measure of two angles whose sum is 180 degrees, or supplementary angles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zNtbi4OJs9I.mp4/zNtbi4OJs9I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zNtbi4OJs9I.mp4/zNtbi4OJs9I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zNtbi4OJs9I.m3u8/zNtbi4OJs9I.m3u8"}, "slug": "example-using-algebra-to-find-measure-of-supplementary-angles", "video_id": "zNtbi4OJs9I", "youtube_id": "zNtbi4OJs9I", "readable_id": "example-using-algebra-to-find-measure-of-supplementary-angles"}, "D-oAsFIHqbY": {"duration": 360, "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/pain-and-temperature-1/", "keywords": "", "id": "D-oAsFIHqbY", "title": "Pain and temperature", "description": "Explore our senses of pain & temperature. \u00a0By Ron.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D-oAsFIHqbY.mp4/D-oAsFIHqbY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D-oAsFIHqbY.mp4/D-oAsFIHqbY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D-oAsFIHqbY.m3u8/D-oAsFIHqbY.m3u8"}, "slug": "pain-and-temperature-1", "video_id": "D-oAsFIHqbY", "youtube_id": "D-oAsFIHqbY", "readable_id": "pain-and-temperature-1"}, "zltgXTlUVLw": {"duration": 233, "path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/recognizing-features-of-functions-2-example-2/", "keywords": "", "id": "zltgXTlUVLw", "title": "Recognizing features of functions (example 2)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zltgXTlUVLw.mp4/zltgXTlUVLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zltgXTlUVLw.mp4/zltgXTlUVLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zltgXTlUVLw.m3u8/zltgXTlUVLw.m3u8"}, "slug": "recognizing-features-of-functions-2-example-2", "video_id": "zltgXTlUVLw", "youtube_id": "zltgXTlUVLw", "readable_id": "recognizing-features-of-functions-2-example-2"}, "qGowzgZCUXc": {"duration": 477, "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies/sscc-blended-summitteach/", "keywords": "", "id": "qGowzgZCUXc", "title": "Case study #1: Teaching in a Flex model at Summit Public Schools", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qGowzgZCUXc.mp4/qGowzgZCUXc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qGowzgZCUXc.mp4/qGowzgZCUXc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qGowzgZCUXc.m3u8/qGowzgZCUXc.m3u8"}, "slug": "sscc-blended-summitteach", "video_id": "qGowzgZCUXc", "youtube_id": "qGowzgZCUXc", "readable_id": "sscc-blended-summitteach"}, "nOZTe8jU2g4": {"duration": 252, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-trinomials-with-a-leading-1-coefficient/", "keywords": "u12_l2_t1_we1, Factoring, trinomials, with, leading, coefficient, CC_39336_A-SSE_1_a, CC_39336_A-SSE_1_b, CC_39336_A-SSE_2, CC_39336_A-SSE_3", "id": "nOZTe8jU2g4", "title": "Introduction to grouping", "description": "Sal factors t^2+8t+15 as (t+3)(t+5), first using the \"sum-product\" method, then using the grouping method.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nOZTe8jU2g4.mp4/nOZTe8jU2g4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nOZTe8jU2g4.mp4/nOZTe8jU2g4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nOZTe8jU2g4.m3u8/nOZTe8jU2g4.m3u8"}, "slug": "factoring-trinomials-with-a-leading-1-coefficient", "video_id": "nOZTe8jU2g4", "youtube_id": "nOZTe8jU2g4", "readable_id": "factoring-trinomials-with-a-leading-1-coefficient"}, "KpaLchFpJZ8": {"duration": 251, "path": "khan/test-prep/mcat/society-and-culture/social-structures/social-theories-overview/", "keywords": "social theories overview", "id": "KpaLchFpJZ8", "title": "Social theories overview (part 1)", "description": "An overview of functionalism, conflict theory, social constructionism, and symbolic interactionism to help you keep them all straight.\u00a0 By Sydney Brown.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KpaLchFpJZ8.mp4/KpaLchFpJZ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KpaLchFpJZ8.mp4/KpaLchFpJZ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KpaLchFpJZ8.m3u8/KpaLchFpJZ8.m3u8"}, "slug": "social-theories-overview", "video_id": "KpaLchFpJZ8", "youtube_id": "KpaLchFpJZ8", "readable_id": "social-theories-overview"}, "7DtWXEPB_AI": {"duration": 123, "path": "khan/math/probability/descriptive-statistics/box-and-whisker-plots/range-and-mid-range/", "keywords": "u08_l2_t1_we2, Range, and, Mid-range", "id": "7DtWXEPB_AI", "title": "Finding the range and mid-range", "description": "The range is the difference between the largest and smallest numbers. The midrange is the average of the largest and smallest number. Practice with this problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7DtWXEPB_AI.mp4/7DtWXEPB_AI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7DtWXEPB_AI.mp4/7DtWXEPB_AI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7DtWXEPB_AI.m3u8/7DtWXEPB_AI.m3u8"}, "slug": "range-and-mid-range", "video_id": "7DtWXEPB_AI", "youtube_id": "7DtWXEPB_AI", "readable_id": "range-and-mid-range"}, "3Ayt7mOd_To": {"duration": 266, "path": "khan/math/algebra-basics/core-algebra-graphing-lines-slope/core-algebra-equation-of-a-line/slope-intercept-form-from-table/", "keywords": "", "id": "3Ayt7mOd_To", "title": "Slope-intercept form from table", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3Ayt7mOd_To.mp4/3Ayt7mOd_To.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3Ayt7mOd_To.mp4/3Ayt7mOd_To.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3Ayt7mOd_To.m3u8/3Ayt7mOd_To.m3u8"}, "slug": "slope-intercept-form-from-table", "video_id": "3Ayt7mOd_To", "youtube_id": "3Ayt7mOd_To", "readable_id": "slope-intercept-form-from-table"}, "OZbM1h3S-aA": {"duration": 715, "path": "khan/humanities/history/crashcourse-worldhistory/so-thats-where-that-comes-from-2/crash-course-world-history-06/", "keywords": "crash course", "id": "OZbM1h3S-aA", "title": "Buddha and Ashoka", "description": "In which John relates a condensed history of India, post-Indus Valley Civilization. John explores Hinduism and the origins of Buddhism. He also gets into the reign of Ashoka, the Buddhist emperor who, in spite of Buddhism's structural disapproval of violence, managed to win a bunch of battles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OZbM1h3S-aA.mp4/OZbM1h3S-aA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OZbM1h3S-aA.mp4/OZbM1h3S-aA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OZbM1h3S-aA.m3u8/OZbM1h3S-aA.m3u8"}, "slug": "crash-course-world-history-06", "video_id": "OZbM1h3S-aA", "youtube_id": "OZbM1h3S-aA", "readable_id": "crash-course-world-history-06"}, "8Otn9DVkm-g": {"duration": 479, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-biosignaling/membrane-receptors/", "keywords": "", "id": "8Otn9DVkm-g", "title": "Membrane Receptors", "description": "Learn about how membrane receptors work in our body.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8Otn9DVkm-g.mp4/8Otn9DVkm-g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8Otn9DVkm-g.mp4/8Otn9DVkm-g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8Otn9DVkm-g.m3u8/8Otn9DVkm-g.m3u8"}, "slug": "membrane-receptors", "video_id": "8Otn9DVkm-g", "youtube_id": "8Otn9DVkm-g", "readable_id": "membrane-receptors"}, "GFiizJ-jGVw": {"duration": 364, "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes/entgegen-zusammen-naming-scheme-for-alkenes-examples/", "keywords": "Entgegen-Zusammen, Naming, Scheme, for, Alkenes, Examples", "id": "GFiizJ-jGVw", "title": "Entgegen-Zusammen naming scheme for alkenes examples", "description": "Entgegen-Zusammen Naming Scheme for Alkenes Examples", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GFiizJ-jGVw.mp4/GFiizJ-jGVw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GFiizJ-jGVw.mp4/GFiizJ-jGVw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GFiizJ-jGVw.m3u8/GFiizJ-jGVw.m3u8"}, "slug": "entgegen-zusammen-naming-scheme-for-alkenes-examples", "video_id": "GFiizJ-jGVw", "youtube_id": "GFiizJ-jGVw", "readable_id": "entgegen-zusammen-naming-scheme-for-alkenes-examples"}, "F2mfEldxsPI": {"duration": 286, "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/another-simulation-giving-evidence-that-n-1-gives-us-an-unbiased-estimate-of-variance/", "keywords": "", "id": "F2mfEldxsPI", "title": "Another simulation giving evidence that (n-1) gives us an unbiased estimate of variance", "description": "Another visualization providing evidence that dividing by n-1 truly gives an unbiased estimate of population variance. Simulation at: http://www.khanacademy.org/cs/unbiased-variance-visualization/1167453164", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F2mfEldxsPI.mp4/F2mfEldxsPI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F2mfEldxsPI.mp4/F2mfEldxsPI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F2mfEldxsPI.m3u8/F2mfEldxsPI.m3u8"}, "slug": "another-simulation-giving-evidence-that-n-1-gives-us-an-unbiased-estimate-of-variance", "video_id": "F2mfEldxsPI", "youtube_id": "F2mfEldxsPI", "readable_id": "another-simulation-giving-evidence-that-n-1-gives-us-an-unbiased-estimate-of-variance"}, "457xnJv80O0": {"duration": 816, "path": "khan/science/organic-chemistry/stereochemistry-topic/diastereomers-meso-compounds/stereoisomers-enantiomers-diastereomers-constitutional-isomers-and-meso-compounds/", "keywords": "Stereoisomers, Enantiomers, Diastereomers", "id": "457xnJv80O0", "title": "Stereoisomers, enantiomers, diastereomers, constitutional isomers and meso compounds", "description": "Stereoisomers, Enantiomers, Diastereomers, Constitutional Isomers and Meso Compounds", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/457xnJv80O0.mp4/457xnJv80O0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/457xnJv80O0.mp4/457xnJv80O0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/457xnJv80O0.m3u8/457xnJv80O0.m3u8"}, "slug": "stereoisomers-enantiomers-diastereomers-constitutional-isomers-and-meso-compounds", "video_id": "457xnJv80O0", "youtube_id": "457xnJv80O0", "readable_id": "stereoisomers-enantiomers-diastereomers-constitutional-isomers-and-meso-compounds"}, "SJUd5du0T08": {"duration": 279, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/seasons-aren-t-dictated-by-closeness-to-sun/", "keywords": "perihelion, aphelion", "id": "SJUd5du0T08", "title": "Seasons aren't dictated by closeness to sun", "description": "Why our closeness to the sun does not dictate the seasons", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SJUd5du0T08.mp4/SJUd5du0T08.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SJUd5du0T08.mp4/SJUd5du0T08.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SJUd5du0T08.m3u8/SJUd5du0T08.m3u8"}, "slug": "seasons-aren-t-dictated-by-closeness-to-sun", "video_id": "SJUd5du0T08", "youtube_id": "SJUd5du0T08", "readable_id": "seasons-aren-t-dictated-by-closeness-to-sun"}, "CCsNJFsYSGs": {"duration": 518, "path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/oxidation-state-trends-in-periodic-table/", "keywords": "", "id": "CCsNJFsYSGs", "title": "Oxidation state trends in periodic table", "description": "Trends in common oxidation states for main group elements.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CCsNJFsYSGs.mp4/CCsNJFsYSGs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CCsNJFsYSGs.mp4/CCsNJFsYSGs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CCsNJFsYSGs.m3u8/CCsNJFsYSGs.m3u8"}, "slug": "oxidation-state-trends-in-periodic-table", "video_id": "CCsNJFsYSGs", "youtube_id": "CCsNJFsYSGs", "readable_id": "oxidation-state-trends-in-periodic-table"}, "iNW6SYDmkDI": {"duration": 303, "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-pieta/", "keywords": "art history, titian, venice", "id": "iNW6SYDmkDI", "title": "Titian, Pieta", "description": "Titian and Palma il Giovane, Piet\u00e0, c. 1570-76, oil on canvas, 11'6\" x 12'9\" (Galleria Dell'Accademia, Venice)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iNW6SYDmkDI.mp4/iNW6SYDmkDI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iNW6SYDmkDI.mp4/iNW6SYDmkDI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iNW6SYDmkDI.m3u8/iNW6SYDmkDI.m3u8"}, "slug": "titian-pieta", "video_id": "iNW6SYDmkDI", "youtube_id": "iNW6SYDmkDI", "readable_id": "titian-pieta"}, "XPf8LMu7QSw": {"duration": 501, "path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/non-linear-systems-of-equations-2/", "keywords": "U10_L2_T2_we2, Non-Linear, Systems, of, Equations, CC_39336_A-REI_10, CC_39336_F-IF_7_a", "id": "XPf8LMu7QSw", "title": "Non-linear systems of equations 2", "description": "Non-Linear Systems of Equations 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XPf8LMu7QSw.mp4/XPf8LMu7QSw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XPf8LMu7QSw.mp4/XPf8LMu7QSw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XPf8LMu7QSw.m3u8/XPf8LMu7QSw.m3u8"}, "slug": "non-linear-systems-of-equations-2", "video_id": "XPf8LMu7QSw", "youtube_id": "XPf8LMu7QSw", "readable_id": "non-linear-systems-of-equations-2"}, "8AwKNC1texM": {"duration": 777, "path": "khan/science/organic-chemistry/gen-chem-review/bond-line-structures/bond-line-structures-new/", "keywords": "", "id": "8AwKNC1texM", "title": "Bond-line structures", "description": "How to draw bond-line structures", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8AwKNC1texM.mp4/8AwKNC1texM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8AwKNC1texM.mp4/8AwKNC1texM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8AwKNC1texM.m3u8/8AwKNC1texM.m3u8"}, "slug": "bond-line-structures-new", "video_id": "8AwKNC1texM", "youtube_id": "8AwKNC1texM", "readable_id": "bond-line-structures-new"}, "hZ827mfh1Jo": {"duration": 997, "path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/im-t-image-of-a-transformation/", "keywords": "image, transformation, subspace", "id": "hZ827mfh1Jo", "title": "im(T): Image of a transformation", "description": "Showing that the image of a subspace under a transformation is also a subspace. Definition of the image of a Transformation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hZ827mfh1Jo.mp4/hZ827mfh1Jo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hZ827mfh1Jo.mp4/hZ827mfh1Jo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hZ827mfh1Jo.m3u8/hZ827mfh1Jo.m3u8"}, "slug": "im-t-image-of-a-transformation", "video_id": "hZ827mfh1Jo", "youtube_id": "hZ827mfh1Jo", "readable_id": "im-t-image-of-a-transformation"}, "oRRiTo8sUwk": {"duration": 164, "path": "khan/humanities/art-asia/imperial-china/beginners-guide-imperial-china/decoding-chinese-calligraphy/", "keywords": "", "id": "oRRiTo8sUwk", "title": "Decoding Chinese calligraphy", "description": "Master Chinese calligrapher Cai Xingyi demonstrates five major scripts. Try your hand at brushpainting in this digital interactive.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oRRiTo8sUwk.mp4/oRRiTo8sUwk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oRRiTo8sUwk.mp4/oRRiTo8sUwk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oRRiTo8sUwk.m3u8/oRRiTo8sUwk.m3u8"}, "slug": "decoding-chinese-calligraphy", "video_id": "oRRiTo8sUwk", "youtube_id": "oRRiTo8sUwk", "readable_id": "decoding-chinese-calligraphy"}, "Pn5YEMwQb4Y": {"duration": 586, "path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/fluids-part-1/", "keywords": "physics, chemistry, fluids, liquids, gasses, pressure", "id": "Pn5YEMwQb4Y", "title": "Pressure and Pascal's principle (part 1)", "description": "Sal explains the difference between liquids and gasses (both fluids). He then starts a calculation of the work done on a liquid in a U-shaped container.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Pn5YEMwQb4Y.mp4/Pn5YEMwQb4Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Pn5YEMwQb4Y.mp4/Pn5YEMwQb4Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Pn5YEMwQb4Y.m3u8/Pn5YEMwQb4Y.m3u8"}, "slug": "fluids-part-1", "video_id": "Pn5YEMwQb4Y", "youtube_id": "Pn5YEMwQb4Y", "readable_id": "fluids-part-1"}, "BxMCXhVdDVU": {"duration": 73, "path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models/sscc-blended-4models/", "keywords": "", "id": "BxMCXhVdDVU", "title": "Four Different Blended Learning Models", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BxMCXhVdDVU.mp4/BxMCXhVdDVU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BxMCXhVdDVU.mp4/BxMCXhVdDVU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BxMCXhVdDVU.m3u8/BxMCXhVdDVU.m3u8"}, "slug": "sscc-blended-4models", "video_id": "BxMCXhVdDVU", "youtube_id": "BxMCXhVdDVU", "readable_id": "sscc-blended-4models"}, "cGg1j1ZCCOs": {"duration": 115, "path": "khan/college-admissions/get-started/introduction-ca/sal-khans-story-college-admissions/", "keywords": "", "id": "cGg1j1ZCCOs", "title": "Sal Khan's story: College admissions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cGg1j1ZCCOs.mp4/cGg1j1ZCCOs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cGg1j1ZCCOs.mp4/cGg1j1ZCCOs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cGg1j1ZCCOs.m3u8/cGg1j1ZCCOs.m3u8"}, "slug": "sal-khans-story-college-admissions", "video_id": "cGg1j1ZCCOs", "youtube_id": "cGg1j1ZCCOs", "readable_id": "sal-khans-story-college-admissions"}, "he4kcTujy30": {"duration": 173, "path": "khan/math/pre-algebra/decimals-pre-alg/decimal-place-value-pre-alg/expanding-out-a-decimal-by-place-value/", "keywords": "", "id": "he4kcTujy30", "title": "Decimals: expanding out place value", "description": "Let's expand a decimal out and really try to understand what it represents.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/he4kcTujy30.mp4/he4kcTujy30.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/he4kcTujy30.mp4/he4kcTujy30.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/he4kcTujy30.m3u8/he4kcTujy30.m3u8"}, "slug": "expanding-out-a-decimal-by-place-value", "video_id": "he4kcTujy30", "youtube_id": "he4kcTujy30", "readable_id": "expanding-out-a-decimal-by-place-value"}, "NGpJPz44JYc": {"duration": 515, "path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-10/", "keywords": "bernoulli's, equation, pressure, velocity, physics", "id": "NGpJPz44JYc", "title": "Bernoulli's equation (part 3)", "description": "Sal finishes the example problem where liquid exits a hole in a container.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NGpJPz44JYc.mp4/NGpJPz44JYc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NGpJPz44JYc.mp4/NGpJPz44JYc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NGpJPz44JYc.m3u8/NGpJPz44JYc.m3u8"}, "slug": "fluids-part-10", "video_id": "NGpJPz44JYc", "youtube_id": "NGpJPz44JYc", "readable_id": "fluids-part-10"}, "dOr0NKyD31Q": {"duration": 717, "path": "khan/math/probability/random-variables-topic/random_variables_prob_dist/discrete-and-continuous-random-variables/", "keywords": "", "id": "dOr0NKyD31Q", "title": "Discrete and continuous random variables", "description": "Defining discrete and continuous random variables. Working through examples of both discrete and continuous random variables.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dOr0NKyD31Q.mp4/dOr0NKyD31Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dOr0NKyD31Q.mp4/dOr0NKyD31Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dOr0NKyD31Q.m3u8/dOr0NKyD31Q.m3u8"}, "slug": "discrete-and-continuous-random-variables", "video_id": "dOr0NKyD31Q", "youtube_id": "dOr0NKyD31Q", "readable_id": "discrete-and-continuous-random-variables"}, "z1yJPpGC3-o": {"duration": 412, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/taxes-and-perfectly-elastic-demand/", "keywords": "microeconomics, elasticity, deadweight, loss, supply, demand", "id": "z1yJPpGC3-o", "title": "Taxes and perfectly elastic demand", "description": "Who bears the burden for a tax on a good with perfectly elastic demand", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z1yJPpGC3-o.mp4/z1yJPpGC3-o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z1yJPpGC3-o.mp4/z1yJPpGC3-o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z1yJPpGC3-o.m3u8/z1yJPpGC3-o.m3u8"}, "slug": "taxes-and-perfectly-elastic-demand", "video_id": "z1yJPpGC3-o", "youtube_id": "z1yJPpGC3-o", "readable_id": "taxes-and-perfectly-elastic-demand"}, "RjkTEyO5Zso": {"duration": 965, "path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphs-of-quadratic-functions/", "keywords": "Graphs, of, Quadratic, Functions", "id": "RjkTEyO5Zso", "title": "Multiple examples graphing parabolas using roots and vertices", "description": "Multiple examples graphing parabolas using roots and vertices", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RjkTEyO5Zso.mp4/RjkTEyO5Zso.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RjkTEyO5Zso.mp4/RjkTEyO5Zso.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RjkTEyO5Zso.m3u8/RjkTEyO5Zso.m3u8"}, "slug": "graphs-of-quadratic-functions", "video_id": "RjkTEyO5Zso", "youtube_id": "RjkTEyO5Zso", "readable_id": "graphs-of-quadratic-functions"}, "U6RFAUmYU5o": {"duration": 484, "path": "khan/humanities/history/euro-hist/wo/1945-end-of-world-war-ii/", "keywords": "", "id": "U6RFAUmYU5o", "title": "1945 - End of World War II", "description": "1945 marks the end of World War II. V-E Day (Victory in Europe Day) is May 8th 1945. War doesn't end in the Pacific until August of 1945 with the atomic bombing of Hiroshima and Nagasaki.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U6RFAUmYU5o.mp4/U6RFAUmYU5o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U6RFAUmYU5o.mp4/U6RFAUmYU5o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U6RFAUmYU5o.m3u8/U6RFAUmYU5o.m3u8"}, "slug": "1945-end-of-world-war-ii", "video_id": "U6RFAUmYU5o", "youtube_id": "U6RFAUmYU5o", "readable_id": "1945-end-of-world-war-ii"}, "W_YeBq1vgAs": {"duration": 193, "path": "khan/humanities/becoming-modern/victorian-art-architecture/victorian-late/room-1890-1910/", "keywords": "Tate, ", "id": "W_YeBq1vgAs", "title": "Room: 1890-1910", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Carol Jacobi explores the period 1890-1910.\n\nLearn more about the art featured in this video:\n-\u00a0Sir William Goscombe John, A Boy at Play, 1895\n-\u00a0Sir Alfred Gilbert, Model for \u2018Eros\u2019 on the Shaftesbury Memorial, Piccadilly Circus, 1891, cast 1925\n- Sir Thomas Brock, Eve, 1900", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W_YeBq1vgAs.mp4/W_YeBq1vgAs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W_YeBq1vgAs.mp4/W_YeBq1vgAs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W_YeBq1vgAs.m3u8/W_YeBq1vgAs.m3u8"}, "slug": "room-1890-1910", "video_id": "W_YeBq1vgAs", "youtube_id": "W_YeBq1vgAs", "readable_id": "room-1890-1910"}, "TgLTzYXg530": {"duration": 253, "path": "khan/humanities/becoming-modern/avant-garde-france/avant-garde-sculpture/rodin-the-gates-of-hell-1880-1917/", "keywords": "Rodin, Gates of Hell, Smarthistory, Art History, Musee d'Orsay, Paris, Sculpture", "id": "TgLTzYXg530", "title": "Rodin, The Gates of Hell", "description": "Auguste Rodin, The Gates of Hell\u200b, 1880-1917, plaster (Mus\u00e9e d'Orsay, Paris)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nWhen the building, earlier on the site of the Mus\u00e9e d'Orsay in Paris, was destroyed by fire during the Commune in 1871, plans were drawn up to replace it with a museum of decorative arts. Rodin won the competition to design a great set of doors for its entry way. Although the museum was never built, Rodin continued to work on the doors. They became an ongoing project; a grand stage for his sculptural ideas. It's fitting that the plaster of this great unfinished sculpture, The Gates of Hell, is now on display at the d'Orsay, the former railway terminal that was built on this site instead of the museum of decorative arts and that, by lovely coincidence, was converted into one of the world's great art museums.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TgLTzYXg530.mp4/TgLTzYXg530.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TgLTzYXg530.mp4/TgLTzYXg530.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TgLTzYXg530.m3u8/TgLTzYXg530.m3u8"}, "slug": "rodin-the-gates-of-hell-1880-1917", "video_id": "TgLTzYXg530", "youtube_id": "TgLTzYXg530", "readable_id": "rodin-the-gates-of-hell-1880-1917"}, "imkOrmHtSJ0": {"duration": 220, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/colonial-americas/virgin-of-guadalupe/", "keywords": "guadalupe, new spain, art history, Mexico,", "id": "imkOrmHtSJ0", "title": "Virgin of Guadalupe", "description": "Virgin of Guadalupe, late 17th century, 190 cm high, oil paint, gilding, and mother of pearl on panel (Franz Mayer Museum, Mexico City). Speakers: Dr. Lauren Kilroy-Ewbank and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/imkOrmHtSJ0.mp4/imkOrmHtSJ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/imkOrmHtSJ0.mp4/imkOrmHtSJ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/imkOrmHtSJ0.m3u8/imkOrmHtSJ0.m3u8"}, "slug": "virgin-of-guadalupe", "video_id": "imkOrmHtSJ0", "youtube_id": "imkOrmHtSJ0", "readable_id": "virgin-of-guadalupe"}, "y4C81qAa3pY": {"duration": 135, "path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/solving-radical-equations-1/", "keywords": "U07_L3_T2_we1, Solving, Radical, Equations, CC_39336_A-REI_2", "id": "y4C81qAa3pY", "title": "Solving radical equations 1", "description": "Solving Radical Equations 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y4C81qAa3pY.mp4/y4C81qAa3pY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y4C81qAa3pY.mp4/y4C81qAa3pY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y4C81qAa3pY.m3u8/y4C81qAa3pY.m3u8"}, "slug": "solving-radical-equations-1", "video_id": "y4C81qAa3pY", "youtube_id": "y4C81qAa3pY", "readable_id": "solving-radical-equations-1"}, "-y9SELk3UNU": {"duration": 699, "path": "khan/test-prep/gmat/problem-solving/gmat-math-38/", "keywords": "gmat, math, problem, solving", "id": "-y9SELk3UNU", "title": "GMAT: Math 38", "description": "190-194, pg. 178", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-y9SELk3UNU.mp4/-y9SELk3UNU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-y9SELk3UNU.mp4/-y9SELk3UNU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-y9SELk3UNU.m3u8/-y9SELk3UNU.m3u8"}, "slug": "gmat-math-38", "video_id": "-y9SELk3UNU", "youtube_id": "-y9SELk3UNU", "readable_id": "gmat-math-38"}, "rtUoWyIE1FM": {"duration": 314, "path": "khan/test-prep/mcat/biomolecules/genetic-mutations/the-causes-of-genetic-mutations/", "keywords": "MCAT", "id": "rtUoWyIE1FM", "title": "The causes of genetic mutations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rtUoWyIE1FM.mp4/rtUoWyIE1FM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rtUoWyIE1FM.mp4/rtUoWyIE1FM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rtUoWyIE1FM.m3u8/rtUoWyIE1FM.m3u8"}, "slug": "the-causes-of-genetic-mutations", "video_id": "rtUoWyIE1FM", "youtube_id": "rtUoWyIE1FM", "readable_id": "the-causes-of-genetic-mutations"}, "kjLwVqxwaIM": {"duration": 583, "path": "khan/test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system/lymphatic-system-immunity/", "keywords": "lymphatic system", "id": "kjLwVqxwaIM", "title": "The lymphatic system's role in immunity", "description": "Learn about how B and T cells reside in lymph nodes. Find out how that enables them to get a preview of what they need to be prepared to fight. By Patrick van Nieuwenhuizen.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kjLwVqxwaIM.mp4/kjLwVqxwaIM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kjLwVqxwaIM.mp4/kjLwVqxwaIM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kjLwVqxwaIM.m3u8/kjLwVqxwaIM.m3u8"}, "slug": "lymphatic-system-immunity", "video_id": "kjLwVqxwaIM", "youtube_id": "kjLwVqxwaIM", "readable_id": "lymphatic-system-immunity"}, "uvA6YY4yHtM": {"duration": 257, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/jan-vermeer-the-glass-of-wine-c-1661/", "keywords": "Vermeer, Wine, GAP, Jan Vermeer, Glass of Wine, 1661, Gem\u00e4ldegalerie, Dutch, Berlin, Baroque, Genre, Interior, Light, Google Art Project, Art History, Smarthistory, Khan Academy, OER, Painting, Netherlands", "id": "uvA6YY4yHtM", "title": "Vermeer, The Glass of Wine", "description": "Jan Vermeer, The Glass of Wine, c. 1661, oil on canvas, 67.7 x 79.6 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uvA6YY4yHtM.mp4/uvA6YY4yHtM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uvA6YY4yHtM.mp4/uvA6YY4yHtM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uvA6YY4yHtM.m3u8/uvA6YY4yHtM.m3u8"}, "slug": "jan-vermeer-the-glass-of-wine-c-1661", "video_id": "uvA6YY4yHtM", "youtube_id": "uvA6YY4yHtM", "readable_id": "jan-vermeer-the-glass-of-wine-c-1661"}, "8y7xP4zz0UY": {"duration": 291, "path": "khan/math/pre-algebra/exponents-radicals/cube-root-tutorial/simplifying-cube-roots-1/", "keywords": "", "id": "8y7xP4zz0UY", "title": "Cube root of a non-perfect cube", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8y7xP4zz0UY.mp4/8y7xP4zz0UY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8y7xP4zz0UY.mp4/8y7xP4zz0UY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8y7xP4zz0UY.m3u8/8y7xP4zz0UY.m3u8"}, "slug": "simplifying-cube-roots-1", "video_id": "8y7xP4zz0UY", "youtube_id": "8y7xP4zz0UY", "readable_id": "simplifying-cube-roots-1"}, "SadSIPGOeIE": {"duration": 207, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/room-1990/", "keywords": "modern art, contemporary art, Tate", "id": "SadSIPGOeIE", "title": "Room: 1990s", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Helen Little explores the 1990s.\n\nLearn more about the art featured in this video:\n-\u00a0Leon Kossoff, Christ Church, Spitalfields, Morning, 1990\n-\u00a0Keith Coventry, East Street Estate, 1994\n- Chris Ofili, No Woman, No Cry, 1998", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SadSIPGOeIE.mp4/SadSIPGOeIE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SadSIPGOeIE.mp4/SadSIPGOeIE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SadSIPGOeIE.m3u8/SadSIPGOeIE.m3u8"}, "slug": "room-1990", "video_id": "SadSIPGOeIE", "youtube_id": "SadSIPGOeIE", "readable_id": "room-1990"}, "TPa8nt2RrHU": {"duration": 172, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/within-sentence-punctuation-harder/", "keywords": "education,online learning,learning,lessons", "id": "TPa8nt2RrHU", "title": "Writing: Within-sentence punctuation \u2014 Harder example 1", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing within-sentence punctuation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TPa8nt2RrHU.mp4/TPa8nt2RrHU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TPa8nt2RrHU.mp4/TPa8nt2RrHU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TPa8nt2RrHU.m3u8/TPa8nt2RrHU.m3u8"}, "slug": "within-sentence-punctuation-harder", "video_id": "TPa8nt2RrHU", "youtube_id": "TPa8nt2RrHU", "readable_id": "within-sentence-punctuation-harder"}, "YZD5ifHZILE": {"duration": 265, "path": "khan/math/pre-algebra/fractions-pre-alg/fractions-unlike-denom-pre-alg/adding-fractions-with-10-and-100-as-denominators/", "keywords": "", "id": "YZD5ifHZILE", "title": "Adding fractions with denominators of 10 and 100", "description": "A great way to learn how to add fractions with unlike demoninators is to do so with denominators in units of 10 and 100. Like this...", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YZD5ifHZILE.mp4/YZD5ifHZILE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YZD5ifHZILE.mp4/YZD5ifHZILE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YZD5ifHZILE.m3u8/YZD5ifHZILE.m3u8"}, "slug": "adding-fractions-with-10-and-100-as-denominators", "video_id": "YZD5ifHZILE", "youtube_id": "YZD5ifHZILE", "readable_id": "adding-fractions-with-10-and-100-as-denominators"}, "SJ3TKg_3PD8": {"duration": 586, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/biological-redox-reactions/", "keywords": "", "id": "SJ3TKg_3PD8", "title": "Biological redox reactions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SJ3TKg_3PD8.mp4/SJ3TKg_3PD8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SJ3TKg_3PD8.mp4/SJ3TKg_3PD8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SJ3TKg_3PD8.m3u8/SJ3TKg_3PD8.m3u8"}, "slug": "biological-redox-reactions", "video_id": "SJ3TKg_3PD8", "youtube_id": "SJ3TKg_3PD8", "readable_id": "biological-redox-reactions"}, "Nue0DINMRPM": {"duration": 69, "path": "khan/science/discoveries-projects/discoveries/batteries/standard-cell/", "keywords": "battery", "id": "Nue0DINMRPM", "title": "Standard cell", "description": "Testing out a cell which holds the metals at a constant distance. We add it to salt water and then check the deflection. Can this be used as a standard unit?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Nue0DINMRPM.mp4/Nue0DINMRPM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Nue0DINMRPM.mp4/Nue0DINMRPM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Nue0DINMRPM.m3u8/Nue0DINMRPM.m3u8"}, "slug": "standard-cell", "video_id": "Nue0DINMRPM", "youtube_id": "Nue0DINMRPM", "readable_id": "standard-cell"}, "Ri557hvwhcM": {"duration": 582, "path": "khan/science/physics/electricity-magnetism/magnetic-field-current-carrying-wire/magnetism-6-magnetic-field-due-to-current/", "keywords": "physics, current, magnetic, field", "id": "Ri557hvwhcM", "title": "Magnetic field created by a current carrying wire", "description": "See how a wire carrying a current creates a magnetic field.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ri557hvwhcM.mp4/Ri557hvwhcM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ri557hvwhcM.mp4/Ri557hvwhcM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ri557hvwhcM.m3u8/Ri557hvwhcM.m3u8"}, "slug": "magnetism-6-magnetic-field-due-to-current", "video_id": "Ri557hvwhcM", "youtube_id": "Ri557hvwhcM", "readable_id": "magnetism-6-magnetic-field-due-to-current"}, "M7NVKImDqGg": {"duration": 103, "path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/decomposing-angles/", "keywords": "", "id": "M7NVKImDqGg", "title": "Solving for an angle", "description": "Let's use a little math with our geometry and see if we can solve for a mystery angle. In this example we know the adjacent angle AND the combination of the mystery angle and the adjacent angle. Mystery angle...how big are you?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M7NVKImDqGg.mp4/M7NVKImDqGg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M7NVKImDqGg.mp4/M7NVKImDqGg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M7NVKImDqGg.m3u8/M7NVKImDqGg.m3u8"}, "slug": "decomposing-angles", "video_id": "M7NVKImDqGg", "youtube_id": "M7NVKImDqGg", "readable_id": "decomposing-angles"}, "aZl9csOSvQU": {"duration": 194, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q2-easier/", "keywords": "", "id": "aZl9csOSvQU", "title": "Percents \u2014 Basic example", "description": "Watch Sal work through a basic Percents problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aZl9csOSvQU.mp4/aZl9csOSvQU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aZl9csOSvQU.mp4/aZl9csOSvQU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aZl9csOSvQU.m3u8/aZl9csOSvQU.m3u8"}, "slug": "sat-math-q2-easier", "video_id": "aZl9csOSvQU", "youtube_id": "aZl9csOSvQU", "readable_id": "sat-math-q2-easier"}, "HGoZfzz6dU0": {"duration": 290, "path": "khan/math/precalculus/prob_comb/combinatorics_precalc/zero-factorial-or-0/", "keywords": "", "id": "HGoZfzz6dU0", "title": "Zero factorial or 0!", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HGoZfzz6dU0.mp4/HGoZfzz6dU0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HGoZfzz6dU0.mp4/HGoZfzz6dU0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HGoZfzz6dU0.m3u8/HGoZfzz6dU0.m3u8"}, "slug": "zero-factorial-or-0", "video_id": "HGoZfzz6dU0", "youtube_id": "HGoZfzz6dU0", "readable_id": "zero-factorial-or-0"}, "Czwrqu5czFU": {"duration": 352, "path": "khan/test-prep/mcat/processing-the-environment/cognition/piagets-stages-of-cognitive-development/", "keywords": "", "id": "Czwrqu5czFU", "title": "Piaget's stages of cognitive development", "description": "\u200bLearn about the stages and developmental milestones in Piaget's theory of cognitive development.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Czwrqu5czFU.mp4/Czwrqu5czFU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Czwrqu5czFU.mp4/Czwrqu5czFU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Czwrqu5czFU.m3u8/Czwrqu5czFU.m3u8"}, "slug": "piagets-stages-of-cognitive-development", "video_id": "Czwrqu5czFU", "youtube_id": "Czwrqu5czFU", "readable_id": "piagets-stages-of-cognitive-development"}, "BPAsaeCbFZQ": {"duration": 225, "path": "khan/humanities/medieval-world/latin-western-europe/gothic1/bonaventura-berlinghieri-altarpiece-of-st-francis-c-1235/", "keywords": "Berlinghieri, Altarpiece of St. Francis, 13th Century, Altarpiece, St. Francis, Pescia, Italy, Church of San Francesco, smarthistory, Gothic Art", "id": "BPAsaeCbFZQ", "title": "Berlinghieri, St. Francis altarpiece", "description": "Bonaventura Berlinghieri, \u00a0St. Francis Altarpiece, 1235 (Church of San Francesco, Pescia, Italy). Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BPAsaeCbFZQ.mp4/BPAsaeCbFZQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BPAsaeCbFZQ.mp4/BPAsaeCbFZQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BPAsaeCbFZQ.m3u8/BPAsaeCbFZQ.m3u8"}, "slug": "bonaventura-berlinghieri-altarpiece-of-st-francis-c-1235", "video_id": "BPAsaeCbFZQ", "youtube_id": "BPAsaeCbFZQ", "readable_id": "bonaventura-berlinghieri-altarpiece-of-st-francis-c-1235"}, "AVNuN89x090": {"duration": 261, "path": "khan/test-prep/ap-art-history/africa-ap/female-pwo-mask/", "keywords": "chokwe,Mask,Democratic Republic Of The Congo (Country),Smarthistory,Art History (Field Of Study),art,sculpture,Smithsonian Institution (Publisher),National Museum Of African Art (Museum),Africa (Continent),African art", "id": "AVNuN89x090", "title": "Female (pwo) mask, Chokwe people", "description": "Female (pwo) mask, Chokwe people, Democratic Republic of Congo, early 20th century, wood, plant fiber, pigment, copper alloy, 39.1 cm high (Smithsonian National Museum of African Art) Speakers: Dr. Peri Klemm and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AVNuN89x090.mp4/AVNuN89x090.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AVNuN89x090.mp4/AVNuN89x090.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AVNuN89x090.m3u8/AVNuN89x090.m3u8"}, "slug": "female-pwo-mask", "video_id": "AVNuN89x090", "youtube_id": "AVNuN89x090", "readable_id": "female-pwo-mask"}, "7siSvYs84fg": {"duration": 274, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/change-in-expected-future-prices-and-demand/", "keywords": "", "id": "7siSvYs84fg", "title": "Change in expected future prices and demand", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7siSvYs84fg.mp4/7siSvYs84fg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7siSvYs84fg.mp4/7siSvYs84fg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7siSvYs84fg.m3u8/7siSvYs84fg.m3u8"}, "slug": "change-in-expected-future-prices-and-demand", "video_id": "7siSvYs84fg", "youtube_id": "7siSvYs84fg", "readable_id": "change-in-expected-future-prices-and-demand"}, "kT4Mp9EdVqs": {"duration": 386, "path": "khan/math/precalculus/precalc-matrices/matrix_multiplication/matrix-multiplication-intro/", "keywords": "", "id": "kT4Mp9EdVqs", "title": "Matrix multiplication introduction", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kT4Mp9EdVqs.mp4/kT4Mp9EdVqs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kT4Mp9EdVqs.mp4/kT4Mp9EdVqs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kT4Mp9EdVqs.m3u8/kT4Mp9EdVqs.m3u8"}, "slug": "matrix-multiplication-intro", "video_id": "kT4Mp9EdVqs", "youtube_id": "kT4Mp9EdVqs", "readable_id": "matrix-multiplication-intro"}, "9onC3FwiQeg": {"duration": 598, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/brass/trombone-interview-and-demonstration-with-principal-joseph-alessi/", "keywords": "", "id": "9onC3FwiQeg", "title": "Trombone: Interview and demonstration with principal Joseph Alessi", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9onC3FwiQeg.mp4/9onC3FwiQeg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9onC3FwiQeg.mp4/9onC3FwiQeg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9onC3FwiQeg.m3u8/9onC3FwiQeg.m3u8"}, "slug": "trombone-interview-and-demonstration-with-principal-joseph-alessi", "video_id": "9onC3FwiQeg", "youtube_id": "9onC3FwiQeg", "readable_id": "trombone-interview-and-demonstration-with-principal-joseph-alessi"}, "xHUsdE880so": {"duration": 891, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm/thoracic-aortic-aneurysms/", "keywords": "", "id": "xHUsdE880so", "title": "Thoracic aortic aneurysms", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xHUsdE880so.mp4/xHUsdE880so.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xHUsdE880so.mp4/xHUsdE880so.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xHUsdE880so.m3u8/xHUsdE880so.m3u8"}, "slug": "thoracic-aortic-aneurysms", "video_id": "xHUsdE880so", "youtube_id": "xHUsdE880so", "readable_id": "thoracic-aortic-aneurysms"}, "mpHMuaVW0DI": {"duration": 164, "path": "khan/math/algebra/linear_inequalities/structure-expressions-linear/dogs-cats-and-bears-in-a-pet-store-analytic-argument/", "keywords": "", "id": "mpHMuaVW0DI", "title": "Dogs cats and bears in a pet store analytic argument", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mpHMuaVW0DI.mp4/mpHMuaVW0DI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mpHMuaVW0DI.mp4/mpHMuaVW0DI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mpHMuaVW0DI.m3u8/mpHMuaVW0DI.m3u8"}, "slug": "dogs-cats-and-bears-in-a-pet-store-analytic-argument", "video_id": "mpHMuaVW0DI", "youtube_id": "mpHMuaVW0DI", "readable_id": "dogs-cats-and-bears-in-a-pet-store-analytic-argument"}, "Egzqu5DWwbA": {"duration": 689, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/dvorak-two/", "keywords": "", "id": "Egzqu5DWwbA", "title": "Antoni\u0301n Dvor\u030ca\u0301k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 2)", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Egzqu5DWwbA.mp4/Egzqu5DWwbA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Egzqu5DWwbA.mp4/Egzqu5DWwbA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Egzqu5DWwbA.m3u8/Egzqu5DWwbA.m3u8"}, "slug": "dvorak-two", "video_id": "Egzqu5DWwbA", "youtube_id": "Egzqu5DWwbA", "readable_id": "dvorak-two"}, "QrHsibKBVwI": {"duration": 258, "path": "khan/math/algebra/systems-of-linear-equations/equivalent-systems-of-equations/simple-elimination-practice/", "keywords": "", "id": "QrHsibKBVwI", "title": "How to solve a system of linear equations with elimination (basic example)", "description": "Sal solves the following system of equations by eliminating x: x-4y=-18 and -x+3y=11.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QrHsibKBVwI.mp4/QrHsibKBVwI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QrHsibKBVwI.mp4/QrHsibKBVwI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QrHsibKBVwI.m3u8/QrHsibKBVwI.m3u8"}, "slug": "simple-elimination-practice", "video_id": "QrHsibKBVwI", "youtube_id": "QrHsibKBVwI", "readable_id": "simple-elimination-practice"}, "uMqM0I5ojs0": {"duration": 635, "path": "khan/test-prep/mcat/processing-the-environment/stress/physical-effects-of-stress/", "keywords": "mcat", "id": "uMqM0I5ojs0", "title": "Physical effects of stress", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uMqM0I5ojs0.mp4/uMqM0I5ojs0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uMqM0I5ojs0.mp4/uMqM0I5ojs0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uMqM0I5ojs0.m3u8/uMqM0I5ojs0.m3u8"}, "slug": "physical-effects-of-stress", "video_id": "uMqM0I5ojs0", "youtube_id": "uMqM0I5ojs0", "readable_id": "physical-effects-of-stress"}, "XyiQ2dwJHXE": {"duration": 554, "path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem/3-d-divergence-theorem-intuition/", "keywords": "", "id": "XyiQ2dwJHXE", "title": "3D divergence theorem intuition", "description": "Intuition behind the Divergence Theorem in three dimensions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XyiQ2dwJHXE.mp4/XyiQ2dwJHXE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XyiQ2dwJHXE.mp4/XyiQ2dwJHXE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XyiQ2dwJHXE.m3u8/XyiQ2dwJHXE.m3u8"}, "slug": "3-d-divergence-theorem-intuition", "video_id": "XyiQ2dwJHXE", "youtube_id": "XyiQ2dwJHXE", "readable_id": "3-d-divergence-theorem-intuition"}, "lnf5ywUA2Y4": {"duration": 170, "path": "khan/college-admissions/paying-for-college/introduction-pfc/overview-paying-for-college/", "keywords": "", "id": "lnf5ywUA2Y4", "title": "Overview: Paying for college", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lnf5ywUA2Y4.mp4/lnf5ywUA2Y4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lnf5ywUA2Y4.mp4/lnf5ywUA2Y4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lnf5ywUA2Y4.m3u8/lnf5ywUA2Y4.m3u8"}, "slug": "overview-paying-for-college", "video_id": "lnf5ywUA2Y4", "youtube_id": "lnf5ywUA2Y4", "readable_id": "overview-paying-for-college"}, "lqv9dXXjfWE": {"duration": 613, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-39/", "keywords": "gmat, data, sufficiency, math", "id": "lqv9dXXjfWE", "title": "GMAT: Data sufficiency 39", "description": "148-150, pg. 290", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lqv9dXXjfWE.mp4/lqv9dXXjfWE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lqv9dXXjfWE.mp4/lqv9dXXjfWE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lqv9dXXjfWE.m3u8/lqv9dXXjfWE.m3u8"}, "slug": "gmat-data-sufficiency-39", "video_id": "lqv9dXXjfWE", "youtube_id": "lqv9dXXjfWE", "readable_id": "gmat-data-sufficiency-39"}, "neAFEvNsiqw": {"duration": 724, "path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/credit-default-swaps-2/", "keywords": "CDS, credit, default, swaps, buffet, financial, weapons, of, mass, destruction", "id": "neAFEvNsiqw", "title": "Credit default swaps 2", "description": "Systemic risks of credit default swaps. Financial weapons of mass destruction.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/neAFEvNsiqw.mp4/neAFEvNsiqw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/neAFEvNsiqw.mp4/neAFEvNsiqw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/neAFEvNsiqw.m3u8/neAFEvNsiqw.m3u8"}, "slug": "credit-default-swaps-2", "video_id": "neAFEvNsiqw", "youtube_id": "neAFEvNsiqw", "readable_id": "credit-default-swaps-2"}, "EV38zfiY6Vs": {"duration": 113, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-two-dig-intro/adding-two-digit-numbers-no-regrouping/", "keywords": "education,online learning,learning,lessons", "id": "EV38zfiY6Vs", "title": "Adding two-digit numbers without regrouping (example 1)", "description": "Let's think through adding 71 + 24.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EV38zfiY6Vs.mp4/EV38zfiY6Vs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EV38zfiY6Vs.mp4/EV38zfiY6Vs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EV38zfiY6Vs.m3u8/EV38zfiY6Vs.m3u8"}, "slug": "adding-two-digit-numbers-no-regrouping", "video_id": "EV38zfiY6Vs", "youtube_id": "EV38zfiY6Vs", "readable_id": "adding-two-digit-numbers-no-regrouping"}, "XAzFGx3Ruig": {"duration": 308, "path": "khan/math/pre-algebra/factors-multiples/divisibility_tests/the-why-of-the-9-divisibility-rule/", "keywords": "", "id": "XAzFGx3Ruig", "title": "The why of the 9 divisibility rule", "description": "Why you can test divisibility by 9 by just adding the digits", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XAzFGx3Ruig.mp4/XAzFGx3Ruig.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XAzFGx3Ruig.mp4/XAzFGx3Ruig.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XAzFGx3Ruig.m3u8/XAzFGx3Ruig.m3u8"}, "slug": "the-why-of-the-9-divisibility-rule", "video_id": "XAzFGx3Ruig", "youtube_id": "XAzFGx3Ruig", "readable_id": "the-why-of-the-9-divisibility-rule"}, "STs6h1qUSGs": {"duration": 503, "path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/giovanni-bellini-saint-francis-in-the-desert-circa-1480/", "keywords": "Giovanni Bellini, Bellini, Saint Francis in the Desert, St. Francis, Ecstasy, Receiving the Stigmata, 1480, Frick Collection, Frick, Venice, Venetian, Renaissance, Landscape, Google Art Project, Smarthistory, Khan Academy, New York, painting, glazing, art, art history, OER", "id": "STs6h1qUSGs", "title": "Bellini, St. Francis", "description": "Giovanni Bellini, Saint Francis in the Desert, c. 1480, oil and tempera on poplar, 124.5 x 141.9 cm (The Frick Collection, New York) . View this work up close on the Google Art Project", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/STs6h1qUSGs.mp4/STs6h1qUSGs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/STs6h1qUSGs.mp4/STs6h1qUSGs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/STs6h1qUSGs.m3u8/STs6h1qUSGs.m3u8"}, "slug": "giovanni-bellini-saint-francis-in-the-desert-circa-1480", "video_id": "STs6h1qUSGs", "youtube_id": "STs6h1qUSGs", "readable_id": "giovanni-bellini-saint-francis-in-the-desert-circa-1480"}, "Fc5t_5r_7IU": {"duration": 585, "path": "khan/math/probability/regression/regression-correlation/calculating-r-squared/", "keywords": "Calculating, R-Squared, to, see, how, well, regression, line, fits, data, CC_8_SP_2, CC_8_SP_3", "id": "Fc5t_5r_7IU", "title": "Calculating R-squared", "description": "Calculating R-Squared to see how well a regression line fits data", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Fc5t_5r_7IU.mp4/Fc5t_5r_7IU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Fc5t_5r_7IU.mp4/Fc5t_5r_7IU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Fc5t_5r_7IU.m3u8/Fc5t_5r_7IU.m3u8"}, "slug": "calculating-r-squared", "video_id": "Fc5t_5r_7IU", "youtube_id": "Fc5t_5r_7IU", "readable_id": "calculating-r-squared"}, "F2psxMnGdUw": {"duration": 559, "path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-6/", "keywords": "solid, revolution, volume, rotation, calculus, disk", "id": "F2psxMnGdUw", "title": "Disc method: Rotating x = f(y) around the y-axis", "description": "Using the disk method around the y-axis.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F2psxMnGdUw.mp4/F2psxMnGdUw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F2psxMnGdUw.mp4/F2psxMnGdUw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F2psxMnGdUw.m3u8/F2psxMnGdUw.m3u8"}, "slug": "solid-of-revolution-part-6", "video_id": "F2psxMnGdUw", "youtube_id": "F2psxMnGdUw", "readable_id": "solid-of-revolution-part-6"}, "HfXqyPS5bRo": {"duration": 503, "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/thermoregulation-by-muscles/", "keywords": "thermoregulation, muscles", "id": "HfXqyPS5bRo", "title": "Thermoregulation by muscles", "description": "Why do we shiver when it's cold? How do our muscles make sure we don't freeze or have a heat stroke? Learn how the skin, brain, blood vessels, and muscles work together to maintain our core body temperature.\u00a0 By Raja Narayan.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HfXqyPS5bRo.mp4/HfXqyPS5bRo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HfXqyPS5bRo.mp4/HfXqyPS5bRo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HfXqyPS5bRo.m3u8/HfXqyPS5bRo.m3u8"}, "slug": "thermoregulation-by-muscles", "video_id": "HfXqyPS5bRo", "youtube_id": "HfXqyPS5bRo", "readable_id": "thermoregulation-by-muscles"}, "AOOKe2ODlWM": {"duration": 64, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-3-problem-solving/", "keywords": "", "id": "AOOKe2ODlWM", "title": "3 Solving simple equation", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AOOKe2ODlWM.mp4/AOOKe2ODlWM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AOOKe2ODlWM.mp4/AOOKe2ODlWM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AOOKe2ODlWM.m3u8/AOOKe2ODlWM.m3u8"}, "slug": "sat-3-problem-solving", "video_id": "AOOKe2ODlWM", "youtube_id": "AOOKe2ODlWM", "readable_id": "sat-3-problem-solving"}, "a_bKCdxLkF0": {"duration": 495, "path": "khan/partner-content/big-history-project/agriculture-civilization/first-cities-appear/bhp-intro-to-history/", "keywords": "", "id": "a_bKCdxLkF0", "title": "Intro to History", "description": "Historians ask questions about the past to help understand the present, and gain insight to the future.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a_bKCdxLkF0.mp4/a_bKCdxLkF0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a_bKCdxLkF0.mp4/a_bKCdxLkF0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a_bKCdxLkF0.m3u8/a_bKCdxLkF0.m3u8"}, "slug": "bhp-intro-to-history", "video_id": "a_bKCdxLkF0", "youtube_id": "a_bKCdxLkF0", "readable_id": "bhp-intro-to-history"}, "EkFUb3L040E": {"duration": 379, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/anemia-of-chronic-disease/", "keywords": "", "id": "EkFUb3L040E", "title": "Anemia of chronic disease", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EkFUb3L040E.mp4/EkFUb3L040E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EkFUb3L040E.mp4/EkFUb3L040E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EkFUb3L040E.m3u8/EkFUb3L040E.m3u8"}, "slug": "anemia-of-chronic-disease", "video_id": "EkFUb3L040E", "youtube_id": "EkFUb3L040E", "readable_id": "anemia-of-chronic-disease"}, "LEFE1km5ROY": {"duration": 358, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/reading_data/u08-l1-t2-we3-stem-and-leaf-plots/", "keywords": "u08_l1_t2_we3, Stem-and-leaf, Plots", "id": "LEFE1km5ROY", "title": "Stem-and-leaf plots", "description": "Stem-and-leaf Plots", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LEFE1km5ROY.mp4/LEFE1km5ROY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LEFE1km5ROY.mp4/LEFE1km5ROY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LEFE1km5ROY.m3u8/LEFE1km5ROY.m3u8"}, "slug": "u08-l1-t2-we3-stem-and-leaf-plots", "video_id": "LEFE1km5ROY", "youtube_id": "LEFE1km5ROY", "readable_id": "u08-l1-t2-we3-stem-and-leaf-plots"}, "iKjVbO2R4_w": {"duration": 123, "path": "khan/humanities/art-asia/imperial-china/later-zhao/buddha-338/", "keywords": "", "id": "iKjVbO2R4_w", "title": "Seated Buddha dated 338", "description": "This Buddha has a unique status among Buddhas in China. It bears an inscription on the back that is equivalent to the year 338. This is the earliest date inscribed on any Buddha sculpture from China, anywhere in the world. Listen to Michael Knight, Curator Emeritus of Chinese Art at the Asian Art Museum, discuss one of the museum's masterpieces, a seated Buddha from 338, as you view images of the object and a rendering in 3D. Learn more about this seated Buddha on the Asian Art Museum's education website.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iKjVbO2R4_w.mp4/iKjVbO2R4_w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iKjVbO2R4_w.mp4/iKjVbO2R4_w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iKjVbO2R4_w.m3u8/iKjVbO2R4_w.m3u8"}, "slug": "buddha-338", "video_id": "iKjVbO2R4_w", "youtube_id": "iKjVbO2R4_w", "readable_id": "buddha-338"}, "Y2-tz27nKoQ": {"duration": 265, "path": "khan/math/pre-algebra/fractions-pre-alg/decimals-fractions-pre-alg/converting-a-fraction-to-a-repeating-decimal/", "keywords": "", "id": "Y2-tz27nKoQ", "title": "Converting a fraction to a repeating decimal (example)", "description": "Learn how to rewrite 19/27 as a repeating decimal. What's a repeating decimal? THAT is a great question. This video explains.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y2-tz27nKoQ.mp4/Y2-tz27nKoQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y2-tz27nKoQ.mp4/Y2-tz27nKoQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y2-tz27nKoQ.m3u8/Y2-tz27nKoQ.m3u8"}, "slug": "converting-a-fraction-to-a-repeating-decimal", "video_id": "Y2-tz27nKoQ", "youtube_id": "Y2-tz27nKoQ", "readable_id": "converting-a-fraction-to-a-repeating-decimal"}, "0uHhk7P9SNo": {"duration": 344, "path": "khan/math/probability/independent-dependent-probability/basic_probability/describing-subsets-of-sample-spaces-exercise/", "keywords": "", "id": "0uHhk7P9SNo", "title": "Describing subsets of sample spaces exercise", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0uHhk7P9SNo.mp4/0uHhk7P9SNo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0uHhk7P9SNo.mp4/0uHhk7P9SNo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0uHhk7P9SNo.m3u8/0uHhk7P9SNo.m3u8"}, "slug": "describing-subsets-of-sample-spaces-exercise", "video_id": "0uHhk7P9SNo", "youtube_id": "0uHhk7P9SNo", "readable_id": "describing-subsets-of-sample-spaces-exercise"}, "175ig2I9rt0": {"duration": 421, "path": "khan/test-prep/mcat/behavior/social-psychology/bystander-effect/", "keywords": "", "id": "175ig2I9rt0", "title": "Bystander effect", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/175ig2I9rt0.mp4/175ig2I9rt0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/175ig2I9rt0.mp4/175ig2I9rt0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/175ig2I9rt0.m3u8/175ig2I9rt0.m3u8"}, "slug": "bystander-effect", "video_id": "175ig2I9rt0", "youtube_id": "175ig2I9rt0", "readable_id": "bystander-effect"}, "UekR9J31a2o": {"duration": 482, "path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/thermodynamics-part-5/", "keywords": "physics, thermodynamics, mole, avogadro's, number", "id": "UekR9J31a2o", "title": "Thermodynamics part 5: Molar ideal gas law problem", "description": "Sal uses the molar version of the ideal gas law to solve for the number of moles in a gas. He also shows how to convert this answer into number of molecules using Avogadro's number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UekR9J31a2o.mp4/UekR9J31a2o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UekR9J31a2o.mp4/UekR9J31a2o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UekR9J31a2o.m3u8/UekR9J31a2o.m3u8"}, "slug": "thermodynamics-part-5", "video_id": "UekR9J31a2o", "youtube_id": "UekR9J31a2o", "readable_id": "thermodynamics-part-5"}, "qCdNab2WLiw": {"duration": 541, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pleural-effusion/transudate-vs-exudate/", "keywords": "", "id": "qCdNab2WLiw", "title": "Transudate vs exudate", "description": "In a pleural effusion, different fluids can enter the pleural cavity. Transudate is fluid pushed through the capillary due to high pressure within the capillary. Exudate is fluid that leaks around the cells of the capillaries caused by inflammation. Learn why transudative fluid does not contain proteins, why exudate does contain proteins, and how health professionals can differentiate between the two using Light\u2019s criteria.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qCdNab2WLiw.mp4/qCdNab2WLiw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qCdNab2WLiw.mp4/qCdNab2WLiw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qCdNab2WLiw.m3u8/qCdNab2WLiw.m3u8"}, "slug": "transudate-vs-exudate", "video_id": "qCdNab2WLiw", "youtube_id": "qCdNab2WLiw", "readable_id": "transudate-vs-exudate"}, "MJIagUN4Lhw": {"duration": 547, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/flute-interview-demo/", "keywords": "", "id": "MJIagUN4Lhw", "title": "Flute: Interview and demonstration with principal Jeffrey Khaner", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MJIagUN4Lhw.mp4/MJIagUN4Lhw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MJIagUN4Lhw.mp4/MJIagUN4Lhw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MJIagUN4Lhw.m3u8/MJIagUN4Lhw.m3u8"}, "slug": "flute-interview-demo", "video_id": "MJIagUN4Lhw", "youtube_id": "MJIagUN4Lhw", "readable_id": "flute-interview-demo"}, "xH5Y3Kmx82w": {"duration": 426, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/alveolar-gas-equation-part-2/", "keywords": "", "id": "xH5Y3Kmx82w", "title": "Alveolar gas equation - part 2", "description": "Find out how to calculate exactly how much oxygen is deep down inside your lungs! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xH5Y3Kmx82w.mp4/xH5Y3Kmx82w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xH5Y3Kmx82w.mp4/xH5Y3Kmx82w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xH5Y3Kmx82w.m3u8/xH5Y3Kmx82w.m3u8"}, "slug": "alveolar-gas-equation-part-2", "video_id": "xH5Y3Kmx82w", "youtube_id": "xH5Y3Kmx82w", "readable_id": "alveolar-gas-equation-part-2"}, "r2syXj4Eb6w": {"duration": 394, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/percussion/piano-as-orchestral-instrument-interview-and-demonstration-with-kimberly-russ/", "keywords": "", "id": "r2syXj4Eb6w", "title": "Piano (as orchestral instrument): Interview and demonstration with Kimberly Russ", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/r2syXj4Eb6w.mp4/r2syXj4Eb6w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/r2syXj4Eb6w.mp4/r2syXj4Eb6w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/r2syXj4Eb6w.m3u8/r2syXj4Eb6w.m3u8"}, "slug": "piano-as-orchestral-instrument-interview-and-demonstration-with-kimberly-russ", "video_id": "r2syXj4Eb6w", "youtube_id": "r2syXj4Eb6w", "readable_id": "piano-as-orchestral-instrument-interview-and-demonstration-with-kimberly-russ"}, "zM_p7tfWvLU": {"duration": 840, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/core-algebra-exponent-properties/exponent-properties-involving-products/", "keywords": "Exponent, Properties, Involving, Products, CC_8_EE_1, CC_39336_A-SSE_3_c", "id": "zM_p7tfWvLU", "title": "Exponent properties involving products", "description": "Gain a deep intuition for these exponent properties: (x^a)( x^b)=x^(a+b) and (xy)^a=(x^a)(y^a) and (x^a)^b=x^(a*b)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zM_p7tfWvLU.mp4/zM_p7tfWvLU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zM_p7tfWvLU.mp4/zM_p7tfWvLU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zM_p7tfWvLU.m3u8/zM_p7tfWvLU.m3u8"}, "slug": "exponent-properties-involving-products", "video_id": "zM_p7tfWvLU", "youtube_id": "zM_p7tfWvLU", "readable_id": "exponent-properties-involving-products"}, "9p3HNMe-oAI": {"duration": 461, "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/math-mechanics-of-thai-banking-crisis/", "keywords": "macroeconomics, thai, currency, crisis", "id": "9p3HNMe-oAI", "title": "Math mechanics of Thai banking crisis", "description": "Going through the mechanics of how a Thai financial institution can lose their shirt when their currency devalues.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9p3HNMe-oAI.mp4/9p3HNMe-oAI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9p3HNMe-oAI.mp4/9p3HNMe-oAI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9p3HNMe-oAI.m3u8/9p3HNMe-oAI.m3u8"}, "slug": "math-mechanics-of-thai-banking-crisis", "video_id": "9p3HNMe-oAI", "youtube_id": "9p3HNMe-oAI", "readable_id": "math-mechanics-of-thai-banking-crisis"}, "Vi1JK6IYVt8": {"duration": 609, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/meet-the-heart/", "keywords": "", "id": "Vi1JK6IYVt8", "title": "Meet the heart!", "description": "Find out exactly where the heart rests in your body and what it does. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Vi1JK6IYVt8.mp4/Vi1JK6IYVt8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Vi1JK6IYVt8.mp4/Vi1JK6IYVt8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Vi1JK6IYVt8.m3u8/Vi1JK6IYVt8.m3u8"}, "slug": "meet-the-heart", "video_id": "Vi1JK6IYVt8", "youtube_id": "Vi1JK6IYVt8", "readable_id": "meet-the-heart"}, "DzVug3LpSHk": {"duration": 274, "path": "khan/partner-content/big-history-project/expansion-interconnection/commerce-collective-learning/bhp-systems-exchange-trade/", "keywords": "", "id": "DzVug3LpSHk", "title": "Systems of Exchange and Trade", "description": "Wealthy Romans and Chinese silkworms: connections that reshape the world.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DzVug3LpSHk.mp4/DzVug3LpSHk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DzVug3LpSHk.mp4/DzVug3LpSHk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DzVug3LpSHk.m3u8/DzVug3LpSHk.m3u8"}, "slug": "bhp-systems-exchange-trade", "video_id": "DzVug3LpSHk", "youtube_id": "DzVug3LpSHk", "readable_id": "bhp-systems-exchange-trade"}, "xO_1bYgoQvA": {"duration": 927, "path": "khan/math/arithmetic/multiplication-division/multiplication_fun/multiplication-2-the-multiplication-tables/", "keywords": "arithmetic, multiplication, tables, CC_3_OA_7, CC_3_OA_9", "id": "xO_1bYgoQvA", "title": "Multiplication 2: The multiplication tables", "description": "Introduction to the multiplication tables from 2-9.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xO_1bYgoQvA.mp4/xO_1bYgoQvA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xO_1bYgoQvA.mp4/xO_1bYgoQvA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xO_1bYgoQvA.m3u8/xO_1bYgoQvA.m3u8"}, "slug": "multiplication-2-the-multiplication-tables", "video_id": "xO_1bYgoQvA", "youtube_id": "xO_1bYgoQvA", "readable_id": "multiplication-2-the-multiplication-tables"}, "LccmkSz-Y-w": {"duration": 534, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/preparation-of-alkyl-halides-from-alcohols/", "keywords": "", "id": "LccmkSz-Y-w", "title": "Preparation of alkyl halides from alcohols", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LccmkSz-Y-w.mp4/LccmkSz-Y-w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LccmkSz-Y-w.mp4/LccmkSz-Y-w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LccmkSz-Y-w.m3u8/LccmkSz-Y-w.m3u8"}, "slug": "preparation-of-alkyl-halides-from-alcohols", "video_id": "LccmkSz-Y-w", "youtube_id": "LccmkSz-Y-w", "readable_id": "preparation-of-alkyl-halides-from-alcohols"}, "MGF0jSP3Txo": {"duration": 707, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/acid-and-base-catalyzed-hydrolysis-of-amides/", "keywords": "", "id": "MGF0jSP3Txo", "title": "Acid and base-catalyzed hydrolysis of amides", "description": "The mechanisms for acid and base catalyzed hydrolysis of amides", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MGF0jSP3Txo.mp4/MGF0jSP3Txo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MGF0jSP3Txo.mp4/MGF0jSP3Txo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MGF0jSP3Txo.m3u8/MGF0jSP3Txo.m3u8"}, "slug": "acid-and-base-catalyzed-hydrolysis-of-amides", "video_id": "MGF0jSP3Txo", "youtube_id": "MGF0jSP3Txo", "readable_id": "acid-and-base-catalyzed-hydrolysis-of-amides"}, "lZfXc4nHooo": {"duration": 300, "path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/basic-fractional-exponents/", "keywords": "", "id": "lZfXc4nHooo", "title": "Introduction to rational exponents", "description": "Sal explains what it means to take a number by a power which is a unit fraction, like 1/2, 1/3, etc.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lZfXc4nHooo.mp4/lZfXc4nHooo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lZfXc4nHooo.mp4/lZfXc4nHooo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lZfXc4nHooo.m3u8/lZfXc4nHooo.m3u8"}, "slug": "basic-fractional-exponents", "video_id": "lZfXc4nHooo", "youtube_id": "lZfXc4nHooo", "readable_id": "basic-fractional-exponents"}, "JYQqml4-4q4": {"duration": 370, "path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/taylor-series-at-0-maclaurin-for-e-to-the-x/", "keywords": "Taylor, Series, at, (Maclaurin), for, to, the", "id": "JYQqml4-4q4", "title": "Taylor series at 0 (Maclaurin) for e to the x", "description": "Taylor Series at 0 (Maclaurin) for e to the x", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JYQqml4-4q4.mp4/JYQqml4-4q4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JYQqml4-4q4.mp4/JYQqml4-4q4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JYQqml4-4q4.m3u8/JYQqml4-4q4.m3u8"}, "slug": "taylor-series-at-0-maclaurin-for-e-to-the-x", "video_id": "JYQqml4-4q4", "youtube_id": "JYQqml4-4q4", "readable_id": "taylor-series-at-0-maclaurin-for-e-to-the-x"}, "TxkA5UX4kis": {"duration": 256, "path": "khan/computing/computer-science/informationtheory/moderninfotheory/compressioncodes/", "keywords": "", "id": "TxkA5UX4kis", "title": "Compression codes", "description": "What is the limit of compression?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TxkA5UX4kis.mp4/TxkA5UX4kis.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TxkA5UX4kis.mp4/TxkA5UX4kis.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TxkA5UX4kis.m3u8/TxkA5UX4kis.m3u8"}, "slug": "compressioncodes", "video_id": "TxkA5UX4kis", "youtube_id": "TxkA5UX4kis", "readable_id": "compressioncodes"}, "-qV__tYb4c4": {"duration": 207, "path": "khan/test-prep/mcat/cells/cytoskeleton/microtubules-2/", "keywords": "", "id": "-qV__tYb4c4", "title": "Microtubules", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-qV__tYb4c4.mp4/-qV__tYb4c4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-qV__tYb4c4.mp4/-qV__tYb4c4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-qV__tYb4c4.m3u8/-qV__tYb4c4.m3u8"}, "slug": "microtubules-2", "video_id": "-qV__tYb4c4", "youtube_id": "-qV__tYb4c4", "readable_id": "microtubules-2"}, "2RC3Hsk90t8": {"duration": 771, "path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/local-threats-to-biodiversity/human-activities-that-threaten-biodiversity/", "keywords": "", "id": "2RC3Hsk90t8", "title": "Human activities that threaten biodiversity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2RC3Hsk90t8.mp4/2RC3Hsk90t8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2RC3Hsk90t8.mp4/2RC3Hsk90t8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2RC3Hsk90t8.m3u8/2RC3Hsk90t8.m3u8"}, "slug": "human-activities-that-threaten-biodiversity", "video_id": "2RC3Hsk90t8", "youtube_id": "2RC3Hsk90t8", "readable_id": "human-activities-that-threaten-biodiversity"}, "Iq7a2vEsT-o": {"duration": 390, "path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/converting-an-explicit-function-to-a-recursive-function/", "keywords": "", "id": "Iq7a2vEsT-o", "title": "How to convert an explicit formula of a geometric sequence to a recursive formula (example)", "description": "Sal solves the following problem: The explicit formula of a geometric sequence is g(x)=9*8^(x-1). Find the recursive formula of the sequence.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Iq7a2vEsT-o.mp4/Iq7a2vEsT-o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Iq7a2vEsT-o.mp4/Iq7a2vEsT-o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Iq7a2vEsT-o.m3u8/Iq7a2vEsT-o.m3u8"}, "slug": "converting-an-explicit-function-to-a-recursive-function", "video_id": "Iq7a2vEsT-o", "youtube_id": "Iq7a2vEsT-o", "readable_id": "converting-an-explicit-function-to-a-recursive-function"}, "IaE632EzCxM": {"duration": 709, "path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/aromatic-heterocycles/", "keywords": "", "id": "IaE632EzCxM", "title": "Aromatic heterocycles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IaE632EzCxM.mp4/IaE632EzCxM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IaE632EzCxM.mp4/IaE632EzCxM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IaE632EzCxM.m3u8/IaE632EzCxM.m3u8"}, "slug": "aromatic-heterocycles", "video_id": "IaE632EzCxM", "youtube_id": "IaE632EzCxM", "readable_id": "aromatic-heterocycles"}, "lGQw-W1PxBE": {"duration": 629, "path": "khan/math/algebra2/conics_precalc/hyperbolas-precalc/conic-sections-hyperbolas-3/", "keywords": "conic, section, hyperbola", "id": "lGQw-W1PxBE", "title": "Conic sections: Hyperbolas 3", "description": "Part 3 of the intro to hyperbolas", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lGQw-W1PxBE.mp4/lGQw-W1PxBE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lGQw-W1PxBE.mp4/lGQw-W1PxBE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lGQw-W1PxBE.m3u8/lGQw-W1PxBE.m3u8"}, "slug": "conic-sections-hyperbolas-3", "video_id": "lGQw-W1PxBE", "youtube_id": "lGQw-W1PxBE", "readable_id": "conic-sections-hyperbolas-3"}, "ghgPq2wjQUQ": {"duration": 1108, "path": "khan/humanities/history/history-survey/us-history/us-history-overview-1-jamestown-to-the-civil-war/", "keywords": "american, revolution, french, and, indian, war, constitution, united, states, boston, tea, party", "id": "ghgPq2wjQUQ", "title": "US History Overview 1: Jamestown to the Civil War", "description": "Jamestown to the Civil War", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ghgPq2wjQUQ.mp4/ghgPq2wjQUQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ghgPq2wjQUQ.mp4/ghgPq2wjQUQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ghgPq2wjQUQ.m3u8/ghgPq2wjQUQ.m3u8"}, "slug": "us-history-overview-1-jamestown-to-the-civil-war", "video_id": "ghgPq2wjQUQ", "youtube_id": "ghgPq2wjQUQ", "readable_id": "us-history-overview-1-jamestown-to-the-civil-war"}, "W_VhVHRal6o": {"duration": 198, "path": "khan/math/pre-algebra/decimals-pre-alg/mult-div-by-10-dec-pre-alg/dividing-a-decimal-by-a-power-of-10/", "keywords": "u3_l2_t2_we4, Dividing, Decimal, by, Power, of, 10, CC_5_NBT_7, CC_6_NS_3", "id": "W_VhVHRal6o", "title": "Dividing a decimal by a power of 10", "description": "When we were multiplying, we moved the decimal to the right for each power of ten. Guess what? When dividing, we move the decimal to the left for each power of ten.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W_VhVHRal6o.mp4/W_VhVHRal6o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W_VhVHRal6o.mp4/W_VhVHRal6o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W_VhVHRal6o.m3u8/W_VhVHRal6o.m3u8"}, "slug": "dividing-a-decimal-by-a-power-of-10", "video_id": "W_VhVHRal6o", "youtube_id": "W_VhVHRal6o", "readable_id": "dividing-a-decimal-by-a-power-of-10"}, "-UagBvxCReA": {"duration": 433, "path": "khan/math/competition-math/amc-10/2013-amc-10-a/2013-amc-10-a-21-amc-12-a-17/", "keywords": "", "id": "-UagBvxCReA", "title": "2013 AMC 10 A #21 / AMC 12 A #17", "description": "Video by Art of Problem Solving. \u00a0Problem from the MAA American Mathematics Competitions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-UagBvxCReA.mp4/-UagBvxCReA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-UagBvxCReA.mp4/-UagBvxCReA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-UagBvxCReA.m3u8/-UagBvxCReA.m3u8"}, "slug": "2013-amc-10-a-21-amc-12-a-17", "video_id": "-UagBvxCReA", "youtube_id": "-UagBvxCReA", "readable_id": "2013-amc-10-a-21-amc-12-a-17"}, "rMklxFGEClE": {"duration": 499, "path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/force-of-friction-keeping-the-block-stationary-edited/", "keywords": "", "id": "rMklxFGEClE", "title": "Force of friction keeping the block stationary", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rMklxFGEClE.mp4/rMklxFGEClE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rMklxFGEClE.mp4/rMklxFGEClE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rMklxFGEClE.m3u8/rMklxFGEClE.m3u8"}, "slug": "force-of-friction-keeping-the-block-stationary-edited", "video_id": "rMklxFGEClE", "youtube_id": "rMklxFGEClE", "readable_id": "force-of-friction-keeping-the-block-stationary-edited"}, "j_kSmmEpvQk": {"duration": 693, "path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/professional-antigen-presenting-cells-apc-and-mhc-ii-complexes/", "keywords": "MHC, APC, antingen, presenting, cells", "id": "j_kSmmEpvQk", "title": "Professional antigen presenting cells (APC) and MHC II complexes", "description": "How professional antigen presenting cells present parts of engulfed pathogens on MHC II complexes (major histocompatibility complexes).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j_kSmmEpvQk.mp4/j_kSmmEpvQk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j_kSmmEpvQk.mp4/j_kSmmEpvQk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j_kSmmEpvQk.m3u8/j_kSmmEpvQk.m3u8"}, "slug": "professional-antigen-presenting-cells-apc-and-mhc-ii-complexes", "video_id": "j_kSmmEpvQk", "youtube_id": "j_kSmmEpvQk", "readable_id": "professional-antigen-presenting-cells-apc-and-mhc-ii-complexes"}, "eVl5zs6Lqy0": {"duration": 600, "path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/potential-energy-stored-in-a-spring/", "keywords": "spring, hooke's, potential, energy, work, physics", "id": "eVl5zs6Lqy0", "title": "Potential energy stored in a spring", "description": "Work needed to compress a spring is the same thing as the potential energy stored in the compressed spring.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eVl5zs6Lqy0.mp4/eVl5zs6Lqy0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eVl5zs6Lqy0.mp4/eVl5zs6Lqy0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eVl5zs6Lqy0.m3u8/eVl5zs6Lqy0.m3u8"}, "slug": "potential-energy-stored-in-a-spring", "video_id": "eVl5zs6Lqy0", "youtube_id": "eVl5zs6Lqy0", "readable_id": "potential-energy-stored-in-a-spring"}, "jabo8iTesqQ": {"duration": 439, "path": "khan/science/discoveries-projects/discoveries/electric_motor/build-your-own-motor/", "keywords": "Motor, build, brushes, projects with electricity", "id": "jabo8iTesqQ", "title": "Build your own motor", "description": "In this video we show you how to build a simple motor", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jabo8iTesqQ.mp4/jabo8iTesqQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jabo8iTesqQ.mp4/jabo8iTesqQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jabo8iTesqQ.m3u8/jabo8iTesqQ.m3u8"}, "slug": "build-your-own-motor", "video_id": "jabo8iTesqQ", "youtube_id": "jabo8iTesqQ", "readable_id": "build-your-own-motor"}, "XVWOlKdpF_I": {"duration": 608, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/hematopoiesis/", "keywords": "", "id": "XVWOlKdpF_I", "title": "Hematopoiesis", "description": "Hematopoiesis is the process of creating new blood cells in the body. All blood cells start off as hematopoietic stem cells, and then specialize (differentiate) into myeloid cells (erythrocytes, megakaryocytes, monocytes, neutrophils, basophils, or eosinophils) or lymphoid cells (T-lymphocytes and B-lymphocytes).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XVWOlKdpF_I.mp4/XVWOlKdpF_I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XVWOlKdpF_I.mp4/XVWOlKdpF_I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XVWOlKdpF_I.m3u8/XVWOlKdpF_I.m3u8"}, "slug": "hematopoiesis", "video_id": "XVWOlKdpF_I", "youtube_id": "XVWOlKdpF_I", "readable_id": "hematopoiesis"}, "Kv3feYibIUk": {"duration": 321, "path": "khan/test-prep/ap-art-history/global-contemporary/hadid-maxxi/", "keywords": "architecture, Rome", "id": "Kv3feYibIUk", "title": "Zaha Hadid, MAXXI National Museum of XXI Century Arts, Rome", "description": "Zaha Hadid, MAXXI National Museum of XXI Century Arts,\u00a01998 -- 2009 (opened 2010), Via Guido Reni, Rome.\u00a0A conversation between Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Kv3feYibIUk.mp4/Kv3feYibIUk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Kv3feYibIUk.mp4/Kv3feYibIUk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Kv3feYibIUk.m3u8/Kv3feYibIUk.m3u8"}, "slug": "hadid-maxxi", "video_id": "Kv3feYibIUk", "youtube_id": "Kv3feYibIUk", "readable_id": "hadid-maxxi"}, "2vSpWt7qC_M": {"duration": 484, "path": "khan/humanities/art-asia/korea-japan/goryeo-dynasty/korean-celadons/", "keywords": "", "id": "2vSpWt7qC_M", "title": "Reviving traditional Korean celadons", "description": "Discover Goryeo dynasty (918\u20131392) celadons, among the most renowned of Asian ceramics.\u00a0 Learn more about the Goryeo dynasty (918\u20131392).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2vSpWt7qC_M.mp4/2vSpWt7qC_M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2vSpWt7qC_M.mp4/2vSpWt7qC_M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2vSpWt7qC_M.m3u8/2vSpWt7qC_M.m3u8"}, "slug": "korean-celadons", "video_id": "2vSpWt7qC_M", "youtube_id": "2vSpWt7qC_M", "readable_id": "korean-celadons"}, "KKJ6FVCHalA": {"duration": 167, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-4-6/", "keywords": "", "id": "KKJ6FVCHalA", "title": "6 Divisibility of unknown number", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KKJ6FVCHalA.mp4/KKJ6FVCHalA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KKJ6FVCHalA.mp4/KKJ6FVCHalA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KKJ6FVCHalA.m3u8/KKJ6FVCHalA.m3u8"}, "slug": "sat-2008-may-4-6", "video_id": "KKJ6FVCHalA", "youtube_id": "KKJ6FVCHalA", "readable_id": "sat-2008-may-4-6"}, "iyrOGvbSS2U": {"duration": 161, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/motivation-for-the-futures-exchange/", "keywords": "Exchange, futures, margin, spread", "id": "iyrOGvbSS2U", "title": "Motivation for the futures exchange", "description": "How an exchange can benefit from trading futures and how it can use margin to mitigate its risk", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iyrOGvbSS2U.mp4/iyrOGvbSS2U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iyrOGvbSS2U.mp4/iyrOGvbSS2U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iyrOGvbSS2U.m3u8/iyrOGvbSS2U.m3u8"}, "slug": "motivation-for-the-futures-exchange", "video_id": "iyrOGvbSS2U", "youtube_id": "iyrOGvbSS2U", "readable_id": "motivation-for-the-futures-exchange"}, "intPEdg4Yyc": {"duration": 475, "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/complex-splitting/", "keywords": "", "id": "intPEdg4Yyc", "title": "Complex splitting", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/intPEdg4Yyc.mp4/intPEdg4Yyc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/intPEdg4Yyc.mp4/intPEdg4Yyc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/intPEdg4Yyc.m3u8/intPEdg4Yyc.m3u8"}, "slug": "complex-splitting", "video_id": "intPEdg4Yyc", "youtube_id": "intPEdg4Yyc", "readable_id": "complex-splitting"}, "lV3LBiivTxw": {"duration": 722, "path": "khan/humanities/history/american-civics/american-civics/the-fiscal-cliff/", "keywords": "marquee", "id": "lV3LBiivTxw", "title": "The fiscal cliff", "description": "Sal compares the possible outcomes of the federal budget negotiations around the \"fiscal cliff.\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lV3LBiivTxw.mp4/lV3LBiivTxw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lV3LBiivTxw.mp4/lV3LBiivTxw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lV3LBiivTxw.m3u8/lV3LBiivTxw.m3u8"}, "slug": "the-fiscal-cliff", "video_id": "lV3LBiivTxw", "youtube_id": "lV3LBiivTxw", "readable_id": "the-fiscal-cliff"}, "wRKVNiABc0w": {"duration": 201, "path": "khan/college-admissions/paying-for-college/loans/benefits-and-drawbacks-of-college-loans/", "keywords": "", "id": "wRKVNiABc0w", "title": "Benefits and drawbacks of college loans", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wRKVNiABc0w.mp4/wRKVNiABc0w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wRKVNiABc0w.mp4/wRKVNiABc0w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wRKVNiABc0w.m3u8/wRKVNiABc0w.m3u8"}, "slug": "benefits-and-drawbacks-of-college-loans", "video_id": "wRKVNiABc0w", "youtube_id": "wRKVNiABc0w", "readable_id": "benefits-and-drawbacks-of-college-loans"}, "JK-8XNIoAkI": {"duration": 1000, "path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/expressing-a-projection-on-to-a-line-as-a-matrix-vector-prod/", "keywords": "matrix, vector, projection, linear, transformation", "id": "JK-8XNIoAkI", "title": "Expressing a projection on to a line as a matrix vector prod", "description": "Expressing a Projection on to a line as a Matrix Vector prod", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JK-8XNIoAkI.mp4/JK-8XNIoAkI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JK-8XNIoAkI.mp4/JK-8XNIoAkI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JK-8XNIoAkI.m3u8/JK-8XNIoAkI.m3u8"}, "slug": "expressing-a-projection-on-to-a-line-as-a-matrix-vector-prod", "video_id": "JK-8XNIoAkI", "youtube_id": "JK-8XNIoAkI", "readable_id": "expressing-a-projection-on-to-a-line-as-a-matrix-vector-prod"}, "OkFdDqW9xxM": {"duration": 452, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/change-of-base-formula/", "keywords": "u18_l3_t1_we3, Change, of, Base, Formula", "id": "OkFdDqW9xxM", "title": "Change of base formula", "description": "Change of Base Formula", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OkFdDqW9xxM.mp4/OkFdDqW9xxM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OkFdDqW9xxM.mp4/OkFdDqW9xxM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OkFdDqW9xxM.m3u8/OkFdDqW9xxM.m3u8"}, "slug": "change-of-base-formula", "video_id": "OkFdDqW9xxM", "youtube_id": "OkFdDqW9xxM", "readable_id": "change-of-base-formula"}, "uFiyXC_x2U0": {"duration": 522, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/weyden/rogier-van-der-weyden-the-last-judgment-1446-52/", "keywords": "Last Judgment, Renaissance, Northern Renaissance, Art, Art History, Smarthistory, van der Weyden", "id": "uFiyXC_x2U0", "title": "Van der Weyden, The Last Judgment Polyptych", "description": "Rogier van der Weyden, The Last Judgment Polyptych, oil on panel partially transferred on canvas, 1446-52 (Mus\u00e9e de l'H\u00f4tel Dieu, Beaune)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uFiyXC_x2U0.mp4/uFiyXC_x2U0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uFiyXC_x2U0.mp4/uFiyXC_x2U0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uFiyXC_x2U0.m3u8/uFiyXC_x2U0.m3u8"}, "slug": "rogier-van-der-weyden-the-last-judgment-1446-52", "video_id": "uFiyXC_x2U0", "youtube_id": "uFiyXC_x2U0", "readable_id": "rogier-van-der-weyden-the-last-judgment-1446-52"}, "-bnCHws9qmw": {"duration": 256, "path": "khan/humanities/art-americas/us-art-19c/civil-war-gilded-age/john-singer-sargent-carnation-lily-lily-rose-1885-86/", "keywords": "John Singer Sargent, Carnation, Lily, Rose, 1885, 1886, Tate, Britain, Sargent, painting, art history, OER, Google Art Project, Smarthistory, Khan Academy, Educational", "id": "-bnCHws9qmw", "title": "Sargent, Carnation, Lily, Lily, Rose", "description": "John Singer Sargent, Carnation, Lily, Lily, Rose, 1885-86, oil on canvas, 1740 x 1537 mm (Tate Britain, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-bnCHws9qmw.mp4/-bnCHws9qmw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-bnCHws9qmw.mp4/-bnCHws9qmw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-bnCHws9qmw.m3u8/-bnCHws9qmw.m3u8"}, "slug": "john-singer-sargent-carnation-lily-lily-rose-1885-86", "video_id": "-bnCHws9qmw", "youtube_id": "-bnCHws9qmw", "readable_id": "john-singer-sargent-carnation-lily-lily-rose-1885-86"}, "7Mo4S2wyMg4": {"duration": 1270, "path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/matrix-vector-products/", "keywords": "matrix, vector, product", "id": "7Mo4S2wyMg4", "title": "Matrix vector products", "description": "Defining and understanding what it means to take the product of a matrix and a vector", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7Mo4S2wyMg4.mp4/7Mo4S2wyMg4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7Mo4S2wyMg4.mp4/7Mo4S2wyMg4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7Mo4S2wyMg4.m3u8/7Mo4S2wyMg4.m3u8"}, "slug": "matrix-vector-products", "video_id": "7Mo4S2wyMg4", "youtube_id": "7Mo4S2wyMg4", "readable_id": "matrix-vector-products"}, "Cum3k-Wglfw": {"duration": 591, "path": "khan/partner-content/wi-phi/critical-thinking/intro-to-critical-thinking/", "keywords": "", "id": "Cum3k-Wglfw", "title": "Fundamentals: Introduction to Critical Thinking", "description": "Geoff Pynn gets you started on the critical thinking journey. He tells you what critical thinking is, what an argument is, and what the difference between a deductive and an ampliative argument is.\u00a0\n\nSpeaker: Dr. Geoff Pynn, Assistant Professor,\u00a0Northern Illinois University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Cum3k-Wglfw.mp4/Cum3k-Wglfw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Cum3k-Wglfw.mp4/Cum3k-Wglfw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Cum3k-Wglfw.m3u8/Cum3k-Wglfw.m3u8"}, "slug": "intro-to-critical-thinking", "video_id": "Cum3k-Wglfw", "youtube_id": "Cum3k-Wglfw", "readable_id": "intro-to-critical-thinking"}, "q2SYtugUdpI": {"duration": 535, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia/pneumonia-vs-pneumonitis/", "keywords": "", "id": "q2SYtugUdpI", "title": "Pneumonia vs. pneumonitis", "description": "Pneumonitis is a term used to describe inflammation of the lung tissues without the presence of an infection, whereas pneumonia is inflammation caused by an infection. Learn what the symptoms of pneumonitis are, and why pneumonitis is more common with bird handlers, farmers, and people who regularly use humidifiers.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q2SYtugUdpI.mp4/q2SYtugUdpI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q2SYtugUdpI.mp4/q2SYtugUdpI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q2SYtugUdpI.m3u8/q2SYtugUdpI.m3u8"}, "slug": "pneumonia-vs-pneumonitis", "video_id": "q2SYtugUdpI", "youtube_id": "q2SYtugUdpI", "readable_id": "pneumonia-vs-pneumonitis"}, "AAmVITyDXbc": {"duration": 330, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/linear-functions-modeling/graphing-linear-functions-1/", "keywords": "", "id": "AAmVITyDXbc", "title": "Graphing linear functions example 1", "description": "Learn how graph a linear function. This video gives an example of graphing fuel consumption as a function of distance.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AAmVITyDXbc.mp4/AAmVITyDXbc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AAmVITyDXbc.mp4/AAmVITyDXbc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AAmVITyDXbc.m3u8/AAmVITyDXbc.m3u8"}, "slug": "graphing-linear-functions-1", "video_id": "AAmVITyDXbc", "youtube_id": "AAmVITyDXbc", "readable_id": "graphing-linear-functions-1"}, "WlLFmm6xm6A": {"duration": 554, "path": "khan/partner-content/cas-biodiversity/biodiversity-protection/science-education/science-and-education-join-forces-to-protect-biodiversity/", "keywords": "", "id": "WlLFmm6xm6A", "title": "Science and education join forces to protect biodiversity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WlLFmm6xm6A.mp4/WlLFmm6xm6A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WlLFmm6xm6A.mp4/WlLFmm6xm6A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WlLFmm6xm6A.m3u8/WlLFmm6xm6A.m3u8"}, "slug": "science-and-education-join-forces-to-protect-biodiversity", "video_id": "WlLFmm6xm6A", "youtube_id": "WlLFmm6xm6A", "readable_id": "science-and-education-join-forces-to-protect-biodiversity"}, "3UlE8gyKbkU": {"duration": 134, "path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/coin-flipping-example/", "keywords": "u08_l4_t1_we3, Coin, Flipping, Example", "id": "3UlE8gyKbkU", "title": "Example: All the ways you can flip a coin", "description": "Manually going through the combinatorics to determine the probability of an event occuring", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3UlE8gyKbkU.mp4/3UlE8gyKbkU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3UlE8gyKbkU.mp4/3UlE8gyKbkU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3UlE8gyKbkU.m3u8/3UlE8gyKbkU.m3u8"}, "slug": "coin-flipping-example", "video_id": "3UlE8gyKbkU", "youtube_id": "3UlE8gyKbkU", "readable_id": "coin-flipping-example"}, "9JcpyE01Yzc": {"duration": 154, "path": "khan/humanities/monarchy-enlightenment/rococo/inlay-technique-marquetry/", "keywords": "", "id": "9JcpyE01Yzc", "title": "The inlay technique of marquetry", "description": "During the 1700s, French furniture makers perfected the art of \"painting in wood,\" creating complex designs using natural and dyed veneers selected for color and grain. Watch marquetry being made. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9JcpyE01Yzc.mp4/9JcpyE01Yzc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9JcpyE01Yzc.mp4/9JcpyE01Yzc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9JcpyE01Yzc.m3u8/9JcpyE01Yzc.m3u8"}, "slug": "inlay-technique-marquetry", "video_id": "9JcpyE01Yzc", "youtube_id": "9JcpyE01Yzc", "readable_id": "inlay-technique-marquetry"}, "bXmODOOJcQU": {"duration": 476, "path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/saponification-base-promoted-ester-hydrolysis/", "keywords": "", "id": "bXmODOOJcQU", "title": "Saponification - Base promoted ester hydrolysis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bXmODOOJcQU.mp4/bXmODOOJcQU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bXmODOOJcQU.mp4/bXmODOOJcQU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bXmODOOJcQU.m3u8/bXmODOOJcQU.m3u8"}, "slug": "saponification-base-promoted-ester-hydrolysis", "video_id": "bXmODOOJcQU", "youtube_id": "bXmODOOJcQU", "readable_id": "saponification-base-promoted-ester-hydrolysis"}, "gGXnILbrhsM": {"duration": 631, "path": "khan/math/multivariable-calculus/line_integrals_topic/greens_theorem/green-s-theorem-example-1/", "keywords": "greens, theorem, line, integral, vector, field", "id": "gGXnILbrhsM", "title": "Green's theorem example 1", "description": "Using Green's Theorem to solve a line integral of a vector field", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gGXnILbrhsM.mp4/gGXnILbrhsM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gGXnILbrhsM.mp4/gGXnILbrhsM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gGXnILbrhsM.m3u8/gGXnILbrhsM.m3u8"}, "slug": "green-s-theorem-example-1", "video_id": "gGXnILbrhsM", "youtube_id": "gGXnILbrhsM", "readable_id": "green-s-theorem-example-1"}, "-FquswEIswk": {"duration": 94, "path": "khan/partner-content/pixar/crowds/crowds2/combinatorics8/", "keywords": "", "id": "-FquswEIswk", "title": "3. Calculating factorials", "description": "Now that we have a feeling for constructing permutations let's introduce the factorial formula to make counting them easy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-FquswEIswk.mp4/-FquswEIswk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-FquswEIswk.mp4/-FquswEIswk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-FquswEIswk.m3u8/-FquswEIswk.m3u8"}, "slug": "combinatorics8", "video_id": "-FquswEIswk", "youtube_id": "-FquswEIswk", "readable_id": "combinatorics8"}, "lmiXf-jilGE": {"duration": 297, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/ischemic-core-and-penumbra/", "keywords": "", "id": "lmiXf-jilGE", "title": "Ischemic core and penumbra", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lmiXf-jilGE.mp4/lmiXf-jilGE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lmiXf-jilGE.mp4/lmiXf-jilGE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lmiXf-jilGE.m3u8/lmiXf-jilGE.m3u8"}, "slug": "ischemic-core-and-penumbra", "video_id": "lmiXf-jilGE", "youtube_id": "lmiXf-jilGE", "readable_id": "ischemic-core-and-penumbra"}, "BQMyeQOLvpg": {"duration": 961, "path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/a-more-formal-understanding-of-functions/", "keywords": "functions", "id": "BQMyeQOLvpg", "title": "A more formal understanding of functions", "description": "A more formal understanding of functions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BQMyeQOLvpg.mp4/BQMyeQOLvpg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BQMyeQOLvpg.mp4/BQMyeQOLvpg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BQMyeQOLvpg.m3u8/BQMyeQOLvpg.m3u8"}, "slug": "a-more-formal-understanding-of-functions", "video_id": "BQMyeQOLvpg", "youtube_id": "BQMyeQOLvpg", "readable_id": "a-more-formal-understanding-of-functions"}, "6crKuLMj_b4": {"duration": 388, "path": "khan/science/discoveries-projects/robots/spider_bot/3-creating-the-battery-and-motor-mounts-for-spider/", "keywords": "", "id": "6crKuLMj_b4", "title": "Battery and motor mounts for Spider", "description": "In this video we show you how to connect Spider's motors and batteries", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6crKuLMj_b4.mp4/6crKuLMj_b4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6crKuLMj_b4.mp4/6crKuLMj_b4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6crKuLMj_b4.m3u8/6crKuLMj_b4.m3u8"}, "slug": "3-creating-the-battery-and-motor-mounts-for-spider", "video_id": "6crKuLMj_b4", "youtube_id": "6crKuLMj_b4", "readable_id": "3-creating-the-battery-and-motor-mounts-for-spider"}, "9s9pkVZD-Iw": {"duration": 183, "path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/lady-auxerre/", "keywords": "Auxerre, Eleutherna, Crete, Greece, Daedalic, limestone, Louvre", "id": "9s9pkVZD-Iw", "title": "Lady of Auxerre", "description": "Statue of a woman, known as the \"Lady of Auxerre,\" Eleutherna, Crete(?), Greece, c. 650-625 B.C.E., Daedalic style, limestone, 75 cm high (Mus\u00e9e du Louvre)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9s9pkVZD-Iw.mp4/9s9pkVZD-Iw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9s9pkVZD-Iw.mp4/9s9pkVZD-Iw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9s9pkVZD-Iw.m3u8/9s9pkVZD-Iw.m3u8"}, "slug": "lady-auxerre", "video_id": "9s9pkVZD-Iw", "youtube_id": "9s9pkVZD-Iw", "readable_id": "lady-auxerre"}, "WvxKwRcHGHg": {"duration": 431, "path": "khan/math/differential-calculus/limits_topic/squeeze_theorem/squeeze-sandwich-theorem/", "keywords": "", "id": "WvxKwRcHGHg", "title": "Squeeze theorem or sandwich theorem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WvxKwRcHGHg.mp4/WvxKwRcHGHg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WvxKwRcHGHg.mp4/WvxKwRcHGHg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WvxKwRcHGHg.m3u8/WvxKwRcHGHg.m3u8"}, "slug": "squeeze-sandwich-theorem", "video_id": "WvxKwRcHGHg", "youtube_id": "WvxKwRcHGHg", "readable_id": "squeeze-sandwich-theorem"}, "mNXBfz1iVzc": {"duration": 148, "path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/dry-ice-moves-on-mars/", "keywords": "", "id": "mNXBfz1iVzc", "title": "Dry ice experiment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mNXBfz1iVzc.mp4/mNXBfz1iVzc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mNXBfz1iVzc.mp4/mNXBfz1iVzc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mNXBfz1iVzc.m3u8/mNXBfz1iVzc.m3u8"}, "slug": "dry-ice-moves-on-mars", "video_id": "mNXBfz1iVzc", "youtube_id": "mNXBfz1iVzc", "readable_id": "dry-ice-moves-on-mars"}, "OU9sWHk_dlw": {"duration": 70, "path": "khan/math/precalculus/precalc-matrices/inverting_matrices/finding-the-determinant-of-a-2x2-matrix/", "keywords": "", "id": "OU9sWHk_dlw", "title": "Finding the determinant of a 2x2 matrix", "description": "Hint for finding the determinant of a 2x2 matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OU9sWHk_dlw.mp4/OU9sWHk_dlw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OU9sWHk_dlw.mp4/OU9sWHk_dlw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OU9sWHk_dlw.m3u8/OU9sWHk_dlw.m3u8"}, "slug": "finding-the-determinant-of-a-2x2-matrix", "video_id": "OU9sWHk_dlw", "youtube_id": "OU9sWHk_dlw", "readable_id": "finding-the-determinant-of-a-2x2-matrix"}, "KURufM070oI": {"duration": 59, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-20-mississippi-river/", "keywords": "", "id": "KURufM070oI", "title": "20 Mississippi River", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KURufM070oI.mp4/KURufM070oI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KURufM070oI.mp4/KURufM070oI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KURufM070oI.m3u8/KURufM070oI.m3u8"}, "slug": "sat-20-mississippi-river", "video_id": "KURufM070oI", "youtube_id": "KURufM070oI", "readable_id": "sat-20-mississippi-river"}, "MNbat1lrJW4": {"duration": 600, "path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/comparing-population-proportions-2/", "keywords": "Comparing, Population, Proportions, CC_7_SP_3, CC_7_SP_4", "id": "MNbat1lrJW4", "title": "Comparing population proportions 2", "description": "Comparing Population Proportions 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MNbat1lrJW4.mp4/MNbat1lrJW4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MNbat1lrJW4.mp4/MNbat1lrJW4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MNbat1lrJW4.m3u8/MNbat1lrJW4.m3u8"}, "slug": "comparing-population-proportions-2", "video_id": "MNbat1lrJW4", "youtube_id": "MNbat1lrJW4", "readable_id": "comparing-population-proportions-2"}, "Tal_fgREll0": {"duration": 365, "path": "khan/math/geometry/similarity/triangle_similarlity/similarity-example-where-same-side-plays-different-roles/", "keywords": "geometry, similarity", "id": "Tal_fgREll0", "title": "Similarity example where same side plays different roles", "description": "The same side not corresponding to itself in two similar triangles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Tal_fgREll0.mp4/Tal_fgREll0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Tal_fgREll0.mp4/Tal_fgREll0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Tal_fgREll0.m3u8/Tal_fgREll0.m3u8"}, "slug": "similarity-example-where-same-side-plays-different-roles", "video_id": "Tal_fgREll0", "youtube_id": "Tal_fgREll0", "readable_id": "similarity-example-where-same-side-plays-different-roles"}, "BeHOvYchtBg": {"duration": 558, "path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/ka-and-acid-strength/", "keywords": "", "id": "BeHOvYchtBg", "title": "Ka and acid strength", "description": "How to write an equilibrium expression for an acid-base reaction and how to evaluate the strength of an acid using Ka", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BeHOvYchtBg.mp4/BeHOvYchtBg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BeHOvYchtBg.mp4/BeHOvYchtBg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BeHOvYchtBg.m3u8/BeHOvYchtBg.m3u8"}, "slug": "ka-and-acid-strength", "video_id": "BeHOvYchtBg", "youtube_id": "BeHOvYchtBg", "readable_id": "ka-and-acid-strength"}, "uzOXGgAgmPs": {"duration": 759, "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-example-part-3-the-home-stretch/", "keywords": "surface, integral", "id": "uzOXGgAgmPs", "title": "Surface integral example part 3: The home stretch", "description": "Using a few trigonometric identities to finally calculate the value of the surface integral", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uzOXGgAgmPs.mp4/uzOXGgAgmPs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uzOXGgAgmPs.mp4/uzOXGgAgmPs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uzOXGgAgmPs.m3u8/uzOXGgAgmPs.m3u8"}, "slug": "surface-integral-example-part-3-the-home-stretch", "video_id": "uzOXGgAgmPs", "youtube_id": "uzOXGgAgmPs", "readable_id": "surface-integral-example-part-3-the-home-stretch"}, "_mGszRbve9s": {"duration": 642, "path": "khan/science/health-and-medicine/lab-values/introduction-to-lab-values-and-normal-ranges/", "keywords": "", "id": "_mGszRbve9s", "title": "Introduction to lab values and normal ranges", "description": "Find out how health professionals use short-hand for labs and the meaning of normal ranges. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_mGszRbve9s.mp4/_mGszRbve9s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_mGszRbve9s.mp4/_mGszRbve9s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_mGszRbve9s.m3u8/_mGszRbve9s.m3u8"}, "slug": "introduction-to-lab-values-and-normal-ranges", "video_id": "_mGszRbve9s", "youtube_id": "_mGszRbve9s", "readable_id": "introduction-to-lab-values-and-normal-ranges"}, "8VOcnNekTjw": {"duration": 193, "path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-a-dvd-player-3-of-5/", "keywords": "motor controller, central processing unit, eeprom, op-amp, operational amplifier, binary, power cables, ribbon cable, data communication, DVD sound and video processing integrated circuit, digital to analogue conversion, control board", "id": "8VOcnNekTjw", "title": "What is inside a DVD player? (3 of 5)", "description": "In this video we explore the control board inside a DVD player.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8VOcnNekTjw.mp4/8VOcnNekTjw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8VOcnNekTjw.mp4/8VOcnNekTjw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8VOcnNekTjw.m3u8/8VOcnNekTjw.m3u8"}, "slug": "what-is-inside-a-dvd-player-3-of-5", "video_id": "8VOcnNekTjw", "youtube_id": "8VOcnNekTjw", "readable_id": "what-is-inside-a-dvd-player-3-of-5"}, "CWiHA5XtqgU": {"duration": 506, "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-margin-rev/long-term-supply-curve-and-economic-profit/", "keywords": "normal, profit, microeconomics", "id": "CWiHA5XtqgU", "title": "Long term supply curve and economic profit", "description": "Understanding the long term supply curve in terms of economic profit", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CWiHA5XtqgU.mp4/CWiHA5XtqgU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CWiHA5XtqgU.mp4/CWiHA5XtqgU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CWiHA5XtqgU.m3u8/CWiHA5XtqgU.m3u8"}, "slug": "long-term-supply-curve-and-economic-profit", "video_id": "CWiHA5XtqgU", "youtube_id": "CWiHA5XtqgU", "readable_id": "long-term-supply-curve-and-economic-profit"}, "uzkc-qNVoOk": {"duration": 498, "path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/basic-probability/", "keywords": "math, chance, mutually, exclusive, events, CC_7_SP_5, CC_7_SP_6, CC_7_SP_7, CC_7_SP_7_a, CC_7_SP_7_b, CC_7_SP_8", "id": "uzkc-qNVoOk", "title": "Probability explained", "description": "We give you an introduction to probability through the example of flipping a quarter and rolling a die.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uzkc-qNVoOk.mp4/uzkc-qNVoOk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uzkc-qNVoOk.mp4/uzkc-qNVoOk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uzkc-qNVoOk.m3u8/uzkc-qNVoOk.m3u8"}, "slug": "basic-probability", "video_id": "uzkc-qNVoOk", "youtube_id": "uzkc-qNVoOk", "readable_id": "basic-probability"}, "eQf_EAYGo-k": {"duration": 1133, "path": "khan/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/stoichiometry-example-problem-2/", "keywords": "Stoichiometry, Example, Problem", "id": "eQf_EAYGo-k", "title": "Stoichiometry example problem 2", "description": "Calculating mass of oxygen needed and grams of product formed from the combustion of 25.0 g of glucose.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eQf_EAYGo-k.mp4/eQf_EAYGo-k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eQf_EAYGo-k.mp4/eQf_EAYGo-k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eQf_EAYGo-k.m3u8/eQf_EAYGo-k.m3u8"}, "slug": "stoichiometry-example-problem-2", "video_id": "eQf_EAYGo-k", "youtube_id": "eQf_EAYGo-k", "readable_id": "stoichiometry-example-problem-2"}, "_q25hz5xLdk": {"duration": 190, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-vs-short-and-leverage/", "keywords": "Put, vs., Short, and, Leverage", "id": "_q25hz5xLdk", "title": "Put vs. short and leverage", "description": "Put vs. Short and Leverage", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_q25hz5xLdk.mp4/_q25hz5xLdk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_q25hz5xLdk.mp4/_q25hz5xLdk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_q25hz5xLdk.m3u8/_q25hz5xLdk.m3u8"}, "slug": "put-vs-short-and-leverage", "video_id": "_q25hz5xLdk", "youtube_id": "_q25hz5xLdk", "readable_id": "put-vs-short-and-leverage"}, "5RzDVNob0-0": {"duration": 135, "path": "khan/math/pre-algebra/order-of-operations/arithmetic_properties/associative-law-of-multiplication/", "keywords": "U01_L4_T1_we6, Associative, Law, of, Multiplication, CC_3_OA_5, CC_5_MD_5_a", "id": "5RzDVNob0-0", "title": "Associative law of multiplication", "description": "Associative Law of Multiplication", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5RzDVNob0-0.mp4/5RzDVNob0-0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5RzDVNob0-0.mp4/5RzDVNob0-0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5RzDVNob0-0.m3u8/5RzDVNob0-0.m3u8"}, "slug": "associative-law-of-multiplication", "video_id": "5RzDVNob0-0", "youtube_id": "5RzDVNob0-0", "readable_id": "associative-law-of-multiplication"}, "igJdDN-DPgA": {"duration": 457, "path": "khan/math/differential-calculus/limits_topic/squeeze_theorem/squeeze-theorem/", "keywords": "calculus, limit, squeeze, theorem, CC_39336_F-IF_1, CC_39336_F-IF_5", "id": "igJdDN-DPgA", "title": "Squeeze theorem (sandwich theorem)", "description": "Intuition (but not a proof) of the Squeeze Theorem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/igJdDN-DPgA.mp4/igJdDN-DPgA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/igJdDN-DPgA.mp4/igJdDN-DPgA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/igJdDN-DPgA.m3u8/igJdDN-DPgA.m3u8"}, "slug": "squeeze-theorem", "video_id": "igJdDN-DPgA", "youtube_id": "igJdDN-DPgA", "readable_id": "squeeze-theorem"}, "FXSuEIMrPQk": {"duration": 875, "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/inflammatory-response/", "keywords": "inflammatory, response, immune, system", "id": "FXSuEIMrPQk", "title": "Inflammatory response", "description": "Overview of the inflammatory response", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FXSuEIMrPQk.mp4/FXSuEIMrPQk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FXSuEIMrPQk.mp4/FXSuEIMrPQk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FXSuEIMrPQk.m3u8/FXSuEIMrPQk.m3u8"}, "slug": "inflammatory-response", "video_id": "FXSuEIMrPQk", "youtube_id": "FXSuEIMrPQk", "readable_id": "inflammatory-response"}, "kxS37n0ASqg": {"duration": 546, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/alpha-substitution-of-carboxylic-acids/", "keywords": "", "id": "kxS37n0ASqg", "title": "Alpha-substitution of carboxylic acids", "description": "How to use the Hell-Volhard-Zelinksy (HVZ) reaction to synthesize alpha-amino acids. By Jay.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kxS37n0ASqg.mp4/kxS37n0ASqg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kxS37n0ASqg.mp4/kxS37n0ASqg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kxS37n0ASqg.m3u8/kxS37n0ASqg.m3u8"}, "slug": "alpha-substitution-of-carboxylic-acids", "video_id": "kxS37n0ASqg", "youtube_id": "kxS37n0ASqg", "readable_id": "alpha-substitution-of-carboxylic-acids"}, "8Ft5iHhauJ0": {"duration": 699, "path": "khan/math/arithmetic/multiplication-division/long_division/division-2/", "keywords": "long, division, CC_3_OA_2, CC_3_OA_6, CC_3_OA_7, CC_4_NBT_6, CC_4_OA_3", "id": "8Ft5iHhauJ0", "title": "Introduction to long division", "description": "Dividing into larger numbers. Introduction to long division without remainders", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8Ft5iHhauJ0.mp4/8Ft5iHhauJ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8Ft5iHhauJ0.mp4/8Ft5iHhauJ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8Ft5iHhauJ0.m3u8/8Ft5iHhauJ0.m3u8"}, "slug": "division-2", "video_id": "8Ft5iHhauJ0", "youtube_id": "8Ft5iHhauJ0", "readable_id": "division-2"}, "ZA_D4O6l1lo": {"duration": 590, "path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/static-and-kinetic-friction-example/", "keywords": "accleration, force, newton, friction", "id": "ZA_D4O6l1lo", "title": "Static and kinetic friction example", "description": "Thinking about the coefficients of static and kinetic friction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZA_D4O6l1lo.mp4/ZA_D4O6l1lo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZA_D4O6l1lo.mp4/ZA_D4O6l1lo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZA_D4O6l1lo.m3u8/ZA_D4O6l1lo.m3u8"}, "slug": "static-and-kinetic-friction-example", "video_id": "ZA_D4O6l1lo", "youtube_id": "ZA_D4O6l1lo", "readable_id": "static-and-kinetic-friction-example"}, "N44RZtJ4jj4": {"duration": 719, "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/consumption-function/generalized-linear-consumption-function/", "keywords": "macroeconomics", "id": "N44RZtJ4jj4", "title": "Generalized linear consumption function", "description": "Generalizing a linear consumption function as a function of aggregate income", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N44RZtJ4jj4.mp4/N44RZtJ4jj4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N44RZtJ4jj4.mp4/N44RZtJ4jj4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N44RZtJ4jj4.m3u8/N44RZtJ4jj4.m3u8"}, "slug": "generalized-linear-consumption-function", "video_id": "N44RZtJ4jj4", "youtube_id": "N44RZtJ4jj4", "readable_id": "generalized-linear-consumption-function"}, "6EY0E3z-hsU": {"duration": 755, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-pythagorean-theorem-compass-constructions/", "keywords": "geometry, pythagorean, theorem, compass, construction", "id": "6EY0E3z-hsU", "title": "CA Geometry: Pythagorean theorem, compass constructions", "description": "51-55, Pythagorean Theorem, compass constructions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6EY0E3z-hsU.mp4/6EY0E3z-hsU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6EY0E3z-hsU.mp4/6EY0E3z-hsU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6EY0E3z-hsU.m3u8/6EY0E3z-hsU.m3u8"}, "slug": "ca-geometry-pythagorean-theorem-compass-constructions", "video_id": "6EY0E3z-hsU", "youtube_id": "6EY0E3z-hsU", "readable_id": "ca-geometry-pythagorean-theorem-compass-constructions"}, "2o-Sef6wllg": {"duration": 724, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/precession-causing-perihelion-to-happen-later/", "keywords": "astronomy, seasons, physics", "id": "2o-Sef6wllg", "title": "Precession causing perihelion to happen later", "description": "Clarifying the effect of axial precession on the calendar and the date of perihelion and aphelion", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2o-Sef6wllg.mp4/2o-Sef6wllg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2o-Sef6wllg.mp4/2o-Sef6wllg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2o-Sef6wllg.m3u8/2o-Sef6wllg.m3u8"}, "slug": "precession-causing-perihelion-to-happen-later", "video_id": "2o-Sef6wllg", "youtube_id": "2o-Sef6wllg", "readable_id": "precession-causing-perihelion-to-happen-later"}, "BRHfy7envyQ": {"duration": 660, "path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/sp-hybridization-jay-final/", "keywords": "", "id": "BRHfy7envyQ", "title": "Sp hybridization", "description": "Sp hybrid orbitals and properties of triple bonds.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BRHfy7envyQ.mp4/BRHfy7envyQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BRHfy7envyQ.mp4/BRHfy7envyQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BRHfy7envyQ.m3u8/BRHfy7envyQ.m3u8"}, "slug": "sp-hybridization-jay-final", "video_id": "BRHfy7envyQ", "youtube_id": "BRHfy7envyQ", "readable_id": "sp-hybridization-jay-final"}, "LXrPdFn7Gn4": {"duration": 752, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/inflation-deflation-capacity-utilization/", "keywords": "inflation, money, supply, deflation", "id": "LXrPdFn7Gn4", "title": "Inflation, deflation, and capacity utilization", "description": "A discussion of inflation and deflation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LXrPdFn7Gn4.mp4/LXrPdFn7Gn4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LXrPdFn7Gn4.mp4/LXrPdFn7Gn4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LXrPdFn7Gn4.m3u8/LXrPdFn7Gn4.m3u8"}, "slug": "inflation-deflation-capacity-utilization", "video_id": "LXrPdFn7Gn4", "youtube_id": "LXrPdFn7Gn4", "readable_id": "inflation-deflation-capacity-utilization"}, "TIwGXn4NalM": {"duration": 279, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/exp_unknown_vars/evaluating-expressions-where-individual-variable-values-are-unknown/", "keywords": "", "id": "TIwGXn4NalM", "title": "Evaluating expressions where individual variable values are unknown", "description": "Working through a few examples where we need to evaluate an expression, but we don't know the individual variable values", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TIwGXn4NalM.mp4/TIwGXn4NalM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TIwGXn4NalM.mp4/TIwGXn4NalM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TIwGXn4NalM.m3u8/TIwGXn4NalM.m3u8"}, "slug": "evaluating-expressions-where-individual-variable-values-are-unknown", "video_id": "TIwGXn4NalM", "youtube_id": "TIwGXn4NalM", "readable_id": "evaluating-expressions-where-individual-variable-values-are-unknown"}, "9EZuhlSNUv0": {"duration": 466, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-bronchiolitis/bronchiolitis-pathophysiology/", "keywords": "", "id": "9EZuhlSNUv0", "title": "Bronchiolitis pathophysiology", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9EZuhlSNUv0.mp4/9EZuhlSNUv0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9EZuhlSNUv0.mp4/9EZuhlSNUv0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9EZuhlSNUv0.m3u8/9EZuhlSNUv0.m3u8"}, "slug": "bronchiolitis-pathophysiology", "video_id": "9EZuhlSNUv0", "youtube_id": "9EZuhlSNUv0", "readable_id": "bronchiolitis-pathophysiology"}, "EzE53aPGbrQ": {"duration": 494, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-5/", "keywords": "2003, AIME, II, Problem, volume, 45, degree, triangle, cylinder", "id": "EzE53aPGbrQ", "title": "2003 AIME II problem 5", "description": "Volume of a wedge cut from a cylindrical log", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EzE53aPGbrQ.mp4/EzE53aPGbrQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EzE53aPGbrQ.mp4/EzE53aPGbrQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EzE53aPGbrQ.m3u8/EzE53aPGbrQ.m3u8"}, "slug": "2003-aime-ii-problem-5", "video_id": "EzE53aPGbrQ", "youtube_id": "EzE53aPGbrQ", "readable_id": "2003-aime-ii-problem-5"}, "Iqws-qzyZwc": {"duration": 822, "path": "khan/math/algebra-basics/core-algebra-graphing-lines-slope/core-algebra-slope/slope-and-rate-of-change/", "keywords": "SlopeAndRateOfChange, CC_8_EE_6, CC_39336_F-IF_6", "id": "Iqws-qzyZwc", "title": "Slope and rate of change", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Iqws-qzyZwc.mp4/Iqws-qzyZwc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Iqws-qzyZwc.mp4/Iqws-qzyZwc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Iqws-qzyZwc.m3u8/Iqws-qzyZwc.m3u8"}, "slug": "slope-and-rate-of-change", "video_id": "Iqws-qzyZwc", "youtube_id": "Iqws-qzyZwc", "readable_id": "slope-and-rate-of-change"}, "ixRtSV3CXPA": {"duration": 1028, "path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/proof-volume-ratios-in-a-carnot-cycle/", "keywords": "thermodynamics, carnot, entropy", "id": "ixRtSV3CXPA", "title": "Proof: Volume ratios in a carnot cycle", "description": "Proof of the volume ratios in a Carnot Cycle", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ixRtSV3CXPA.mp4/ixRtSV3CXPA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ixRtSV3CXPA.mp4/ixRtSV3CXPA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ixRtSV3CXPA.m3u8/ixRtSV3CXPA.m3u8"}, "slug": "proof-volume-ratios-in-a-carnot-cycle", "video_id": "ixRtSV3CXPA", "youtube_id": "ixRtSV3CXPA", "readable_id": "proof-volume-ratios-in-a-carnot-cycle"}, "7j6HcztlLdw": {"duration": 498, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/myelodysplastic-syndrome/", "keywords": "", "id": "7j6HcztlLdw", "title": "Myelodysplastic syndrome", "description": "Myelodysplastic syndrome is sometimes referred to as \u201cpre-leukemia\u201d or a condition that occurs before leukemia (although most patients will never develop leukemia). In myelodysplastic syndrome, the gene mutation preventing the maturation of the blast cell is present, however the second gene mutation leading to uncontrolled cell replication is absent. Learn how health professionals look at blood test results and bone marrow aspirates to diagnosis this disease.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7j6HcztlLdw.mp4/7j6HcztlLdw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7j6HcztlLdw.mp4/7j6HcztlLdw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7j6HcztlLdw.m3u8/7j6HcztlLdw.m3u8"}, "slug": "myelodysplastic-syndrome", "video_id": "7j6HcztlLdw", "youtube_id": "7j6HcztlLdw", "readable_id": "myelodysplastic-syndrome"}, "8n4nne9FQFo": {"duration": 158, "path": "khan/partner-content/big-history-project/agriculture-civilization/rise-of-agriculture/bhp-why-agriculture-was-so-important/", "keywords": "", "id": "8n4nne9FQFo", "title": "Threshold 7: Agriculture", "description": "When humans began farming, new, more complex ways of living were possible.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8n4nne9FQFo.mp4/8n4nne9FQFo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8n4nne9FQFo.mp4/8n4nne9FQFo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8n4nne9FQFo.m3u8/8n4nne9FQFo.m3u8"}, "slug": "bhp-why-agriculture-was-so-important", "video_id": "8n4nne9FQFo", "youtube_id": "8n4nne9FQFo", "readable_id": "bhp-why-agriculture-was-so-important"}, "bXxkxJnqt3s": {"duration": 131, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q1-easier/", "keywords": "", "id": "bXxkxJnqt3s", "title": "Ratios, rates, and proportions \u2014 Basic example", "description": "Watch Sal work through a basic Ratios, rates, and proportions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bXxkxJnqt3s.mp4/bXxkxJnqt3s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bXxkxJnqt3s.mp4/bXxkxJnqt3s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bXxkxJnqt3s.m3u8/bXxkxJnqt3s.m3u8"}, "slug": "sat-math-q1-easier", "video_id": "bXxkxJnqt3s", "youtube_id": "bXxkxJnqt3s", "readable_id": "sat-math-q1-easier"}, "EKKe7DBZVhI": {"duration": 581, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/understanding-calendar-notation/", "keywords": "calendar, christ", "id": "EKKe7DBZVhI", "title": "Understanding calendar notation", "description": "Difference between BC, BCE, AD and CE. A little bit about the birth of Jesus as well.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EKKe7DBZVhI.mp4/EKKe7DBZVhI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EKKe7DBZVhI.mp4/EKKe7DBZVhI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EKKe7DBZVhI.m3u8/EKKe7DBZVhI.m3u8"}, "slug": "understanding-calendar-notation", "video_id": "EKKe7DBZVhI", "youtube_id": "EKKe7DBZVhI", "readable_id": "understanding-calendar-notation"}, "lRHq7sMRWpU": {"duration": 533, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/normal-sinus-rhythm-on-ecg/", "keywords": "", "id": "lRHq7sMRWpU", "title": "Normal sinus rhythm on an EKG", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lRHq7sMRWpU.mp4/lRHq7sMRWpU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lRHq7sMRWpU.mp4/lRHq7sMRWpU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lRHq7sMRWpU.m3u8/lRHq7sMRWpU.m3u8"}, "slug": "normal-sinus-rhythm-on-ecg", "video_id": "lRHq7sMRWpU", "youtube_id": "lRHq7sMRWpU", "readable_id": "normal-sinus-rhythm-on-ecg"}, "TgKBc3Igx1I": {"duration": 384, "path": "khan/math/algebra/quadratics/solving_graphing_quadratics/quadratic-functions-3/", "keywords": "U10_L1_T1_we3, Quadratic, Functions, CC_39336_A-REI_4, CC_39336_A-SSE_3_b, CC_39336_F-IF_7_a, CC_39336_F-IF_8_a", "id": "TgKBc3Igx1I", "title": "Graphing a parabola by finding the roots and vertex", "description": "Graphing a parabola by finding the roots and vertex", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TgKBc3Igx1I.mp4/TgKBc3Igx1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TgKBc3Igx1I.mp4/TgKBc3Igx1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TgKBc3Igx1I.m3u8/TgKBc3Igx1I.m3u8"}, "slug": "quadratic-functions-3", "video_id": "TgKBc3Igx1I", "youtube_id": "TgKBc3Igx1I", "readable_id": "quadratic-functions-3"}, "HNoyVb1hr7g": {"duration": 220, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/henry-wallis-chatterton-1856/", "keywords": "Poetry, Suicide, Tate Britain, Henry Wallis, Wallis, Chatterton, 1856, London, Garret, Khan Academy, smarthistory, art history, Google Art Project, OER", "id": "HNoyVb1hr7g", "title": "Wallis, Chatterton", "description": "Henry Wallis, Chatterton, 1856, oil on canvas, 622 x 933 cm (Tate Britain, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HNoyVb1hr7g.mp4/HNoyVb1hr7g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HNoyVb1hr7g.mp4/HNoyVb1hr7g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HNoyVb1hr7g.m3u8/HNoyVb1hr7g.m3u8"}, "slug": "henry-wallis-chatterton-1856", "video_id": "HNoyVb1hr7g", "youtube_id": "HNoyVb1hr7g", "readable_id": "henry-wallis-chatterton-1856"}, "wf3-tRpmGmY": {"duration": 586, "path": "khan/test-prep/mcat/behavior/theories-personality/observational-learning/", "keywords": "bobo doll experiment, observational learning, social cognitive theory", "id": "wf3-tRpmGmY", "title": "Observational learning: Bobo doll experiment and social cognitive theory", "description": "An explanation of the Bobo Doll Experiment, how it demonstrated learning performance distinction, and resulted in Bandura's Social Cognitive Theory. By Jeffrey Walsh.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wf3-tRpmGmY.mp4/wf3-tRpmGmY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wf3-tRpmGmY.mp4/wf3-tRpmGmY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wf3-tRpmGmY.m3u8/wf3-tRpmGmY.m3u8"}, "slug": "observational-learning", "video_id": "wf3-tRpmGmY", "youtube_id": "wf3-tRpmGmY", "readable_id": "observational-learning"}, "otstXFxMkl4": {"duration": 1039, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/frb-commentary-2-deposit-insurance/", "keywords": "fractional, reserve, banking", "id": "otstXFxMkl4", "title": "FRB commentary 2: Deposit insurance", "description": "More on the weaknesses of fractional reserve banking. The FDIC and deposit insurance and its side effects.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/otstXFxMkl4.mp4/otstXFxMkl4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/otstXFxMkl4.mp4/otstXFxMkl4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/otstXFxMkl4.m3u8/otstXFxMkl4.m3u8"}, "slug": "frb-commentary-2-deposit-insurance", "video_id": "otstXFxMkl4", "youtube_id": "otstXFxMkl4", "readable_id": "frb-commentary-2-deposit-insurance"}, "gHTH6PKfpMc": {"duration": 576, "path": "khan/math/arithmetic/multiplication-division/long_division/level-4-division/", "keywords": "Division, math, CC_4_NBT_6, CC_6_NS_2", "id": "gHTH6PKfpMc", "title": "Level 4 division", "description": "Dividing a two digit number into a larger number", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gHTH6PKfpMc.mp4/gHTH6PKfpMc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gHTH6PKfpMc.mp4/gHTH6PKfpMc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gHTH6PKfpMc.m3u8/gHTH6PKfpMc.m3u8"}, "slug": "level-4-division", "video_id": "gHTH6PKfpMc", "youtube_id": "gHTH6PKfpMc", "readable_id": "level-4-division"}, "ji4ilvfmTEw": {"duration": 389, "path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/title-insurance/", "keywords": "", "id": "ji4ilvfmTEw", "title": "Title insurance", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ji4ilvfmTEw.mp4/ji4ilvfmTEw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ji4ilvfmTEw.mp4/ji4ilvfmTEw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ji4ilvfmTEw.m3u8/ji4ilvfmTEw.m3u8"}, "slug": "title-insurance", "video_id": "ji4ilvfmTEw", "youtube_id": "ji4ilvfmTEw", "readable_id": "title-insurance"}, "jEVfDSfO9Gw": {"duration": 210, "path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/christian-schad-self-portrait-1927/", "keywords": "Schad, Tate Modern, Neue Sachlickeit, New Realism, Art history, smarthistory, modern art, chad", "id": "jEVfDSfO9Gw", "title": "Schad, Self-Portrait", "description": "Christian Schad, Self-Portrait, 1927, oil on wood, 29 x 24-3/8 inches, 76 x 62 cm\n(Tate Modern, London)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jEVfDSfO9Gw.mp4/jEVfDSfO9Gw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jEVfDSfO9Gw.mp4/jEVfDSfO9Gw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jEVfDSfO9Gw.m3u8/jEVfDSfO9Gw.m3u8"}, "slug": "christian-schad-self-portrait-1927", "video_id": "jEVfDSfO9Gw", "youtube_id": "jEVfDSfO9Gw", "readable_id": "christian-schad-self-portrait-1927"}, "6dIMIBO_2mc": {"duration": 308, "path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/whether-a-special-quadrilateral-can-exist/", "keywords": "parallel, lines, transversal", "id": "6dIMIBO_2mc", "title": "Whether a special quadrilateral can exist", "description": "Proving whether a special quadrilateral can exist", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6dIMIBO_2mc.mp4/6dIMIBO_2mc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6dIMIBO_2mc.mp4/6dIMIBO_2mc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6dIMIBO_2mc.m3u8/6dIMIBO_2mc.m3u8"}, "slug": "whether-a-special-quadrilateral-can-exist", "video_id": "6dIMIBO_2mc", "youtube_id": "6dIMIBO_2mc", "readable_id": "whether-a-special-quadrilateral-can-exist"}, "cIpEZXOAn0I": {"duration": 192, "path": "khan/humanities/becoming-modern/symbolism/khnopff-jeanne-k-fer-1885/", "keywords": "Khnopff, Symbolism, Smarthistory, Art History", "id": "cIpEZXOAn0I", "title": "Khnopff, Jeanne K\u00e9fer", "description": "Fernand Khnopff, Jeanne K\u00e9fer, oil on canvas, 1885 (The Getty Center, Los Angeles) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cIpEZXOAn0I.mp4/cIpEZXOAn0I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cIpEZXOAn0I.mp4/cIpEZXOAn0I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cIpEZXOAn0I.m3u8/cIpEZXOAn0I.m3u8"}, "slug": "khnopff-jeanne-k-fer-1885", "video_id": "cIpEZXOAn0I", "youtube_id": "cIpEZXOAn0I", "readable_id": "khnopff-jeanne-k-fer-1885"}, "aoXUWSwiDzE": {"duration": 747, "path": "khan/math/algebra/introduction-to-algebra/variable-and-expressions/variable-expressions/", "keywords": "Variable, Expressions, CC_6_EE_2, CC_6_EE_2_c", "id": "aoXUWSwiDzE", "title": "Examples of evaluating variable expressions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aoXUWSwiDzE.mp4/aoXUWSwiDzE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aoXUWSwiDzE.mp4/aoXUWSwiDzE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aoXUWSwiDzE.m3u8/aoXUWSwiDzE.m3u8"}, "slug": "variable-expressions", "video_id": "aoXUWSwiDzE", "youtube_id": "aoXUWSwiDzE", "readable_id": "variable-expressions"}, "CYjAgOTVfZk": {"duration": 286, "path": "khan/math/integral-calculus/integration-techniques/trig_substitution/trig-substitution-with-tangent/", "keywords": "", "id": "CYjAgOTVfZk", "title": "Trig substitution with tangent", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CYjAgOTVfZk.mp4/CYjAgOTVfZk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CYjAgOTVfZk.mp4/CYjAgOTVfZk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CYjAgOTVfZk.m3u8/CYjAgOTVfZk.m3u8"}, "slug": "trig-substitution-with-tangent", "video_id": "CYjAgOTVfZk", "youtube_id": "CYjAgOTVfZk", "readable_id": "trig-substitution-with-tangent"}, "Bp-iW9YxnNU": {"duration": 248, "path": "khan/college-admissions/explore-college-options/campus-visit/visiting-campus/", "keywords": "", "id": "Bp-iW9YxnNU", "title": "Visiting campus", "description": "Campus Visit Alternative: Online Tour", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Bp-iW9YxnNU.mp4/Bp-iW9YxnNU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Bp-iW9YxnNU.mp4/Bp-iW9YxnNU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Bp-iW9YxnNU.m3u8/Bp-iW9YxnNU.m3u8"}, "slug": "visiting-campus", "video_id": "Bp-iW9YxnNU", "youtube_id": "Bp-iW9YxnNU", "readable_id": "visiting-campus"}, "PC_FoyewoIs": {"duration": 287, "path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/coordinate-plane-word-problems-exercise/", "keywords": "", "id": "PC_FoyewoIs", "title": "Coordinate plane: word problem exercise", "description": "In this word problem, we need to plot the ordered pairs and then figure out the difference in the y coodinate between the two. This will give us our answer!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PC_FoyewoIs.mp4/PC_FoyewoIs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PC_FoyewoIs.mp4/PC_FoyewoIs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PC_FoyewoIs.m3u8/PC_FoyewoIs.m3u8"}, "slug": "coordinate-plane-word-problems-exercise", "video_id": "PC_FoyewoIs", "youtube_id": "PC_FoyewoIs", "readable_id": "coordinate-plane-word-problems-exercise"}, "d22BeBhk1nY": {"duration": 72, "path": "khan/science/discoveries-projects/discoveries/electromagnet/primitive-electric-motor/", "keywords": "electric motor", "id": "d22BeBhk1nY", "title": "Electromagnetic field (loop)", "description": "Applying current in various directions to a single loop of wire. Primitive electric motor?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d22BeBhk1nY.mp4/d22BeBhk1nY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d22BeBhk1nY.mp4/d22BeBhk1nY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d22BeBhk1nY.m3u8/d22BeBhk1nY.m3u8"}, "slug": "primitive-electric-motor", "video_id": "d22BeBhk1nY", "youtube_id": "d22BeBhk1nY", "readable_id": "primitive-electric-motor"}, "JrTsNuUQXzU": {"duration": 217, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-narcissus-at-the-source-1597-99/", "keywords": "Narcissus, Caravaggio, Baroque, Italian, Narcissus at the Source, 1597", "id": "JrTsNuUQXzU", "title": "Caravaggio, Narcissus at the Source", "description": "Michelangelo Merisi da Caravaggio, Narcissus at the Source, oil on canvas, 1597-99 (Palazzo Barbarini) \n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JrTsNuUQXzU.mp4/JrTsNuUQXzU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JrTsNuUQXzU.mp4/JrTsNuUQXzU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JrTsNuUQXzU.m3u8/JrTsNuUQXzU.m3u8"}, "slug": "caravaggio-narcissus-at-the-source-1597-99", "video_id": "JrTsNuUQXzU", "youtube_id": "JrTsNuUQXzU", "readable_id": "caravaggio-narcissus-at-the-source-1597-99"}, "p7Fsb21B2Xg": {"duration": 882, "path": "khan/test-prep/mcat/chemical-processes/dot-structures/drawing-dot-structures/", "keywords": "", "id": "p7Fsb21B2Xg", "title": "Drawing dot structures", "description": "Guidelines for drawing Lewis dot structures.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p7Fsb21B2Xg.mp4/p7Fsb21B2Xg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p7Fsb21B2Xg.mp4/p7Fsb21B2Xg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p7Fsb21B2Xg.m3u8/p7Fsb21B2Xg.m3u8"}, "slug": "drawing-dot-structures", "video_id": "p7Fsb21B2Xg", "youtube_id": "p7Fsb21B2Xg", "readable_id": "drawing-dot-structures"}, "qbMe4f2yvKs": {"duration": 131, "path": "khan/math/pre-algebra/fractions-pre-alg/decimals-fractions-pre-alg/converting-decimals-to-fractions-2-ex-2/", "keywords": "Converting, decimals, to, fractions, 2, ex", "id": "qbMe4f2yvKs", "title": "Converting decimals to fractions 2 (ex 2)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qbMe4f2yvKs.mp4/qbMe4f2yvKs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qbMe4f2yvKs.mp4/qbMe4f2yvKs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qbMe4f2yvKs.m3u8/qbMe4f2yvKs.m3u8"}, "slug": "converting-decimals-to-fractions-2-ex-2", "video_id": "qbMe4f2yvKs", "youtube_id": "qbMe4f2yvKs", "readable_id": "converting-decimals-to-fractions-2-ex-2"}, "ucAUriWEFo8": {"duration": 523, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/shorting-stock/shorting-stock-2/", "keywords": "stock, short, covering, risk, sale, market, finance", "id": "ucAUriWEFo8", "title": "Shorting stock 2", "description": "More on the mechanics of shorting stock.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ucAUriWEFo8.mp4/ucAUriWEFo8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ucAUriWEFo8.mp4/ucAUriWEFo8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ucAUriWEFo8.m3u8/ucAUriWEFo8.m3u8"}, "slug": "shorting-stock-2", "video_id": "ucAUriWEFo8", "youtube_id": "ucAUriWEFo8", "readable_id": "shorting-stock-2"}, "7f-LsuAnLMA": {"duration": 133, "path": "khan/computing/computer-programming/html-css/css-layout-properties/css-in-the-wild-google-maps/", "keywords": "", "id": "7f-LsuAnLMA", "title": "CSS in the wild: Google Maps", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7f-LsuAnLMA.mp4/7f-LsuAnLMA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7f-LsuAnLMA.mp4/7f-LsuAnLMA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7f-LsuAnLMA.m3u8/7f-LsuAnLMA.m3u8"}, "slug": "css-in-the-wild-google-maps", "video_id": "7f-LsuAnLMA", "youtube_id": "7f-LsuAnLMA", "readable_id": "css-in-the-wild-google-maps"}, "1jDDfkKKgmc": {"duration": 982, "path": "khan/math/trigonometry/trig-function-graphs/long_live_tau/tau-versus-pi/", "keywords": "trigonometry, geometry, euler's, formula, identity, radian, sin, cos, sine, angle", "id": "1jDDfkKKgmc", "title": "Tau versus pi", "description": "Why Tau might be a better number to look at than Pi", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1jDDfkKKgmc.mp4/1jDDfkKKgmc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1jDDfkKKgmc.mp4/1jDDfkKKgmc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1jDDfkKKgmc.m3u8/1jDDfkKKgmc.m3u8"}, "slug": "tau-versus-pi", "video_id": "1jDDfkKKgmc", "youtube_id": "1jDDfkKKgmc", "readable_id": "tau-versus-pi"}, "gXnHodHNusg": {"duration": 855, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-4-part-1/", "keywords": "2003, AIME, II, Problem, (part, 1), Three, dimensional, geometry", "id": "gXnHodHNusg", "title": "2003 AIME II problem 4 (part 1)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gXnHodHNusg.mp4/gXnHodHNusg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gXnHodHNusg.mp4/gXnHodHNusg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gXnHodHNusg.m3u8/gXnHodHNusg.m3u8"}, "slug": "2003-aime-ii-problem-4-part-1", "video_id": "gXnHodHNusg", "youtube_id": "gXnHodHNusg", "readable_id": "2003-aime-ii-problem-4-part-1"}, "PkzACPGZcVk": {"duration": 121, "path": "khan/humanities/art-1010/early-abstraction/cubism/moma-simultaneous-contrasts-sun-moon/", "keywords": "", "id": "PkzACPGZcVk", "title": "Robert Delaunay, \"Simultaneous Contrasts: Sun and Moon\"", "description": "To learn more about how abstract artists became the radical thinkers of their time, take our online course, Modern Art, 1880-1945 or Pigment to Pixel: Color in Modern and Contemporary Art.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PkzACPGZcVk.mp4/PkzACPGZcVk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PkzACPGZcVk.mp4/PkzACPGZcVk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PkzACPGZcVk.m3u8/PkzACPGZcVk.m3u8"}, "slug": "moma-simultaneous-contrasts-sun-moon", "video_id": "PkzACPGZcVk", "youtube_id": "PkzACPGZcVk", "readable_id": "moma-simultaneous-contrasts-sun-moon"}, "eLUmpX_h9sw": {"duration": 358, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/interpreting_linear_functions/interpreting-features-of-linear-functions-example-2/", "keywords": "", "id": "eLUmpX_h9sw", "title": "Interpreting linear tables word problems example 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eLUmpX_h9sw.mp4/eLUmpX_h9sw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eLUmpX_h9sw.mp4/eLUmpX_h9sw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eLUmpX_h9sw.m3u8/eLUmpX_h9sw.m3u8"}, "slug": "interpreting-features-of-linear-functions-example-2", "video_id": "eLUmpX_h9sw", "youtube_id": "eLUmpX_h9sw", "readable_id": "interpreting-features-of-linear-functions-example-2"}, "w89mmoD0O4c": {"duration": 133, "path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-5-review-of-time-signatures-simple-compound-and-complex/", "keywords": "", "id": "w89mmoD0O4c", "title": "Lesson 5: Review of time signatures \u2013 Simple, compound, and complex", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w89mmoD0O4c.mp4/w89mmoD0O4c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w89mmoD0O4c.mp4/w89mmoD0O4c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w89mmoD0O4c.m3u8/w89mmoD0O4c.m3u8"}, "slug": "lesson-5-review-of-time-signatures-simple-compound-and-complex", "video_id": "w89mmoD0O4c", "youtube_id": "w89mmoD0O4c", "readable_id": "lesson-5-review-of-time-signatures-simple-compound-and-complex"}, "xHuLZHasldg": {"duration": 437, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/shorthand-notation-for-galvanicvoltaic-cells/", "keywords": "", "id": "xHuLZHasldg", "title": "Shorthand notation for galvanic/voltaic cells", "description": "How to describe cell using shorthand notation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xHuLZHasldg.mp4/xHuLZHasldg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xHuLZHasldg.mp4/xHuLZHasldg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xHuLZHasldg.m3u8/xHuLZHasldg.m3u8"}, "slug": "shorthand-notation-for-galvanicvoltaic-cells", "video_id": "xHuLZHasldg", "youtube_id": "xHuLZHasldg", "readable_id": "shorthand-notation-for-galvanicvoltaic-cells"}, "hIAdCTNi1S8": {"duration": 389, "path": "khan/math/algebra/introduction-to-algebra/units-algebra/dimensional-analysis-units-algebraically/", "keywords": "", "id": "hIAdCTNi1S8", "title": "Treating units algebraically and dimensional analysis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hIAdCTNi1S8.mp4/hIAdCTNi1S8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hIAdCTNi1S8.mp4/hIAdCTNi1S8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hIAdCTNi1S8.m3u8/hIAdCTNi1S8.m3u8"}, "slug": "dimensional-analysis-units-algebraically", "video_id": "hIAdCTNi1S8", "youtube_id": "hIAdCTNi1S8", "readable_id": "dimensional-analysis-units-algebraically"}, "8G0RkfeKfBg": {"duration": 407, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/decarboxylation/", "keywords": "", "id": "8G0RkfeKfBg", "title": "Decarboxylation", "description": "The decarboxylation (loss of carbon dioxide) of malonic acid and a beta-keto acid", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8G0RkfeKfBg.mp4/8G0RkfeKfBg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8G0RkfeKfBg.mp4/8G0RkfeKfBg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8G0RkfeKfBg.m3u8/8G0RkfeKfBg.m3u8"}, "slug": "decarboxylation", "video_id": "8G0RkfeKfBg", "youtube_id": "8G0RkfeKfBg", "readable_id": "decarboxylation"}, "xp6Zj24h8uA": {"duration": 517, "path": "khan/science/biology/cellular-molecular-biology/photosynthesis/cam-plants/", "keywords": "CAM, C-4, crassulacean, acid, metabolism, photosynthesis", "id": "xp6Zj24h8uA", "title": "Cam plants", "description": "How CAM Plants are able to fix carbon at night so they don't have to keep their stomata open during the day", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xp6Zj24h8uA.mp4/xp6Zj24h8uA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xp6Zj24h8uA.mp4/xp6Zj24h8uA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xp6Zj24h8uA.m3u8/xp6Zj24h8uA.m3u8"}, "slug": "cam-plants", "video_id": "xp6Zj24h8uA", "youtube_id": "xp6Zj24h8uA", "readable_id": "cam-plants"}, "IniG1KkPS2c": {"duration": 702, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-14-fed-funds-rate/", "keywords": "federal, reserve, bernanke, target, open, market, operations", "id": "IniG1KkPS2c", "title": "Banking 14: Fed funds rate", "description": "How open market operations effect the rate at which banks lend to each other overnight.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IniG1KkPS2c.mp4/IniG1KkPS2c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IniG1KkPS2c.mp4/IniG1KkPS2c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IniG1KkPS2c.m3u8/IniG1KkPS2c.m3u8"}, "slug": "banking-14-fed-funds-rate", "video_id": "IniG1KkPS2c", "youtube_id": "IniG1KkPS2c", "readable_id": "banking-14-fed-funds-rate"}, "GyBS8GMynKQ": {"duration": 1012, "path": "khan/partner-content/brookings-institution/introduction-to-healthcare/health-care-cost/", "keywords": "", "id": "GyBS8GMynKQ", "title": "Health care costs", "description": "We all know the US spends a lot on health care, but why are costs so high and what can we do about it? This video explains the reasons why costs have risen so rapidly and various policies proposed to contain costs and improve health care value.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GyBS8GMynKQ.mp4/GyBS8GMynKQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GyBS8GMynKQ.mp4/GyBS8GMynKQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GyBS8GMynKQ.m3u8/GyBS8GMynKQ.m3u8"}, "slug": "health-care-cost", "video_id": "GyBS8GMynKQ", "youtube_id": "GyBS8GMynKQ", "readable_id": "health-care-cost"}, "fFdOr8U4mnI": {"duration": 195, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/cross-topic-arithmetic/u09-l1-t2-we4-adding-real-numbers-application/", "keywords": "u09, l1, t2, we4, Adding, Real, Numbers, Application", "id": "fFdOr8U4mnI", "title": "Rational number word problem with decimals", "description": "Your checking account is overdrawn. Not good. Use your knowledge of decimals and adding negative and positive numbers to bring your account back into the black.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fFdOr8U4mnI.mp4/fFdOr8U4mnI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fFdOr8U4mnI.mp4/fFdOr8U4mnI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fFdOr8U4mnI.m3u8/fFdOr8U4mnI.m3u8"}, "slug": "u09-l1-t2-we4-adding-real-numbers-application", "video_id": "fFdOr8U4mnI", "youtube_id": "fFdOr8U4mnI", "readable_id": "u09-l1-t2-we4-adding-real-numbers-application"}, "8wYvKeSK1IY": {"duration": 603, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial/carbon-14-dating-1/", "keywords": "Carbon, 14, Dating", "id": "8wYvKeSK1IY", "title": "Carbon 14 dating 1", "description": "Carbon 14 Dating 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8wYvKeSK1IY.mp4/8wYvKeSK1IY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8wYvKeSK1IY.mp4/8wYvKeSK1IY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8wYvKeSK1IY.m3u8/8wYvKeSK1IY.m3u8"}, "slug": "carbon-14-dating-1", "video_id": "8wYvKeSK1IY", "youtube_id": "8wYvKeSK1IY", "readable_id": "carbon-14-dating-1"}, "Hx6-m510hjU": {"duration": 603, "path": "khan/partner-content/big-history-project/agriculture-civilization/rise-of-agriculture/bhp-why-agriculture-was-important/", "keywords": "", "id": "Hx6-m510hjU", "title": "Why Was Agriculture So Important?", "description": "The invention of agriculture is not just a matter of tastier food. It unlocked powerful forces that transformed history.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hx6-m510hjU.mp4/Hx6-m510hjU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hx6-m510hjU.mp4/Hx6-m510hjU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hx6-m510hjU.m3u8/Hx6-m510hjU.m3u8"}, "slug": "bhp-why-agriculture-was-important", "video_id": "Hx6-m510hjU", "youtube_id": "Hx6-m510hjU", "readable_id": "bhp-why-agriculture-was-important"}, "Cc9cLmgXp_A": {"duration": 249, "path": "khan/humanities/ancient-art-civilizations/aegean-art1/mycenaean/treasury-of-atreus/", "keywords": "", "id": "Cc9cLmgXp_A", "title": "The Treasury of Atreus, c. 1300-1250 B.C.E., Mycenae, Greece", "description": "Speakers: Dr. Steven Zucker and Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Cc9cLmgXp_A.mp4/Cc9cLmgXp_A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Cc9cLmgXp_A.mp4/Cc9cLmgXp_A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Cc9cLmgXp_A.m3u8/Cc9cLmgXp_A.m3u8"}, "slug": "treasury-of-atreus", "video_id": "Cc9cLmgXp_A", "youtube_id": "Cc9cLmgXp_A", "readable_id": "treasury-of-atreus"}, "-KE7jTXwNYs": {"duration": 267, "path": "khan/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/atp-hydrolysis-mechanism/", "keywords": "education,online learning,learning,lessons,ATPase,enzyme,ATP,hydrolysis", "id": "-KE7jTXwNYs", "title": "ATP hydrolysis mechanism", "description": "ATP hydrolysis mechanism. How energy is released when ATP is converted to ADP and phosphate.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-KE7jTXwNYs.mp4/-KE7jTXwNYs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-KE7jTXwNYs.mp4/-KE7jTXwNYs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-KE7jTXwNYs.m3u8/-KE7jTXwNYs.m3u8"}, "slug": "atp-hydrolysis-mechanism", "video_id": "-KE7jTXwNYs", "youtube_id": "-KE7jTXwNYs", "readable_id": "atp-hydrolysis-mechanism"}, "lmm767eIsGU": {"duration": 153, "path": "khan/math/geometry/geometric-constructions/circum-in-circles/constructing-circle-inscribing-triangle/", "keywords": "", "id": "lmm767eIsGU", "title": "Constructing circle inscribing triangle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lmm767eIsGU.mp4/lmm767eIsGU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lmm767eIsGU.mp4/lmm767eIsGU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lmm767eIsGU.m3u8/lmm767eIsGU.m3u8"}, "slug": "constructing-circle-inscribing-triangle", "video_id": "lmm767eIsGU", "youtube_id": "lmm767eIsGU", "readable_id": "constructing-circle-inscribing-triangle"}, "i1dAnpSFbyI": {"duration": 861, "path": "khan/science/biology/structure-of-a-cell/tour-of-organelles/mitochondria-video/", "keywords": "education,online learning,learning,lessons,mitochondria,mitochondrion,crista,cristae,ATP", "id": "i1dAnpSFbyI", "title": "Mitochondria", "description": "The structure and role of mitochondria (plural for mitochondrion). Discusses the outer membrane, inner membrane, cristae, porins, etc.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i1dAnpSFbyI.mp4/i1dAnpSFbyI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i1dAnpSFbyI.mp4/i1dAnpSFbyI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i1dAnpSFbyI.m3u8/i1dAnpSFbyI.m3u8"}, "slug": "mitochondria-video", "video_id": "i1dAnpSFbyI", "youtube_id": "i1dAnpSFbyI", "readable_id": "mitochondria-video"}, "8sz1IPjBRS8": {"duration": 354, "path": "khan/math/algebra-basics/core-algebra-graphing-lines-slope/core-algebra-slope/slope-and-y-intercept-intuition/", "keywords": "slope, y-intercept, graph", "id": "8sz1IPjBRS8", "title": "Slope and y-intercept intuition", "description": "Using the \"Graph of a line\" module to understand how a line's graph changes when its slope or y-intercept is changed.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8sz1IPjBRS8.mp4/8sz1IPjBRS8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8sz1IPjBRS8.mp4/8sz1IPjBRS8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8sz1IPjBRS8.m3u8/8sz1IPjBRS8.m3u8"}, "slug": "slope-and-y-intercept-intuition", "video_id": "8sz1IPjBRS8", "youtube_id": "8sz1IPjBRS8", "readable_id": "slope-and-y-intercept-intuition"}, "vO1Ur38PGCY": {"duration": 302, "path": "khan/math/geometry/congruence/transformations-congruence/another-example-of-rigid-transformations-for-congruence/", "keywords": "", "id": "vO1Ur38PGCY", "title": "How to map one figure onto another using a sequence of transformations (example)", "description": "Sal maps a given quadrilateral onto another using a translation, a dilation, and a reflection. The quadrilaterals are not congruent because a dilation was used.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vO1Ur38PGCY.mp4/vO1Ur38PGCY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vO1Ur38PGCY.mp4/vO1Ur38PGCY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vO1Ur38PGCY.m3u8/vO1Ur38PGCY.m3u8"}, "slug": "another-example-of-rigid-transformations-for-congruence", "video_id": "vO1Ur38PGCY", "youtube_id": "vO1Ur38PGCY", "readable_id": "another-example-of-rigid-transformations-for-congruence"}, "JTpXK2mENH4": {"duration": 571, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-15-part-3/", "keywords": "complex, analysis, trigonometry, competition, math", "id": "JTpXK2mENH4", "title": "2003 AIME II problem 15 (part 3)", "description": "Finding the sum of the absolute value of the imaginary parts of the square of the roots of a crazy polynomial", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JTpXK2mENH4.mp4/JTpXK2mENH4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JTpXK2mENH4.mp4/JTpXK2mENH4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JTpXK2mENH4.m3u8/JTpXK2mENH4.m3u8"}, "slug": "2003-aime-ii-problem-15-part-3", "video_id": "JTpXK2mENH4", "youtube_id": "JTpXK2mENH4", "readable_id": "2003-aime-ii-problem-15-part-3"}, "ww_yT9ckPWw": {"duration": 555, "path": "khan/math/probability/regression/regression-correlation/second-regression-example/", "keywords": "Second, Regression, Example, line, least, squared, CC_8_SP_2, CC_8_SP_3", "id": "ww_yT9ckPWw", "title": "Second regression example", "description": "Second Regression Example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ww_yT9ckPWw.mp4/ww_yT9ckPWw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ww_yT9ckPWw.mp4/ww_yT9ckPWw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ww_yT9ckPWw.m3u8/ww_yT9ckPWw.m3u8"}, "slug": "second-regression-example", "video_id": "ww_yT9ckPWw", "youtube_id": "ww_yT9ckPWw", "readable_id": "second-regression-example"}, "1OtzfP8fCNU": {"duration": 514, "path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/graphs-of-absolute-value-functions/", "keywords": "", "id": "1OtzfP8fCNU", "title": "Graphs of absolute value functions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1OtzfP8fCNU.mp4/1OtzfP8fCNU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1OtzfP8fCNU.mp4/1OtzfP8fCNU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1OtzfP8fCNU.m3u8/1OtzfP8fCNU.m3u8"}, "slug": "graphs-of-absolute-value-functions", "video_id": "1OtzfP8fCNU", "youtube_id": "1OtzfP8fCNU", "readable_id": "graphs-of-absolute-value-functions"}, "EkBUTZe_SiM": {"duration": 80, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h6-easier/", "keywords": "", "id": "EkBUTZe_SiM", "title": "Solving linear equations and linear inequalities \u2014 Basic example", "description": "Watch Sal work through a basic Solving linear equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EkBUTZe_SiM.mp4/EkBUTZe_SiM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EkBUTZe_SiM.mp4/EkBUTZe_SiM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EkBUTZe_SiM.m3u8/EkBUTZe_SiM.m3u8"}, "slug": "sat-math-h6-easier", "video_id": "EkBUTZe_SiM", "youtube_id": "EkBUTZe_SiM", "readable_id": "sat-math-h6-easier"}, "n6xCyzOP900": {"duration": 326, "path": "khan/math/probability/descriptive-statistics/central_tendency/exploring-mean-and-median-module/", "keywords": "", "id": "n6xCyzOP900", "title": "Exploring the mean and median", "description": "Watch as we use a nifty interactive module to demonstrate how moving points along a number line can help us find the mean and median.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n6xCyzOP900.mp4/n6xCyzOP900.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n6xCyzOP900.mp4/n6xCyzOP900.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n6xCyzOP900.m3u8/n6xCyzOP900.m3u8"}, "slug": "exploring-mean-and-median-module", "video_id": "n6xCyzOP900", "youtube_id": "n6xCyzOP900", "readable_id": "exploring-mean-and-median-module"}, "ervHbKa7R5g": {"duration": 842, "path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/geithner-plan-i/", "keywords": "geithner, timothy, obama, plan, bailout, TALF, TARP", "id": "ervHbKa7R5g", "title": "Geithner plan 1", "description": "Overview of the Geithner Plan and the problem it is supposed to solve.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ervHbKa7R5g.mp4/ervHbKa7R5g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ervHbKa7R5g.mp4/ervHbKa7R5g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ervHbKa7R5g.m3u8/ervHbKa7R5g.m3u8"}, "slug": "geithner-plan-i", "video_id": "ervHbKa7R5g", "youtube_id": "ervHbKa7R5g", "readable_id": "geithner-plan-i"}, "MuD06cnjtAM": {"duration": 273, "path": "khan/humanities/ancient-art-civilizations/roman/late-empire/colossus-of-constantine/", "keywords": "", "id": "MuD06cnjtAM", "title": "The Colossus of Constantine", "description": "The Colossus of Constantine, c. 312-15, Palazzo dei Conservatori, Musei Capitolini, Rome\n\nA conversation between Dr. Beth Harris and Dr. Steven Zucker in front of the Colossus of Constantine.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MuD06cnjtAM.mp4/MuD06cnjtAM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MuD06cnjtAM.mp4/MuD06cnjtAM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MuD06cnjtAM.m3u8/MuD06cnjtAM.m3u8"}, "slug": "colossus-of-constantine", "video_id": "MuD06cnjtAM", "youtube_id": "MuD06cnjtAM", "readable_id": "colossus-of-constantine"}, "0YD5xSvseIw": {"duration": 50, "path": "khan/science/organic-chemistry/aromatic-compounds/reactions-benzene/friedel-crafts-acylation-addendum/", "keywords": "Friedel, Crafts, Acylation, Addendum", "id": "0YD5xSvseIw", "title": "Friedel crafts acylation addendum", "description": "Friedel Crafts Acylation Addendum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0YD5xSvseIw.mp4/0YD5xSvseIw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0YD5xSvseIw.mp4/0YD5xSvseIw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0YD5xSvseIw.m3u8/0YD5xSvseIw.m3u8"}, "slug": "friedel-crafts-acylation-addendum", "video_id": "0YD5xSvseIw", "youtube_id": "0YD5xSvseIw", "readable_id": "friedel-crafts-acylation-addendum"}, "KWv5PaoHwPA": {"duration": 507, "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes/naming-alkenes-examples/", "keywords": "Naming, Alkenes, Examples", "id": "KWv5PaoHwPA", "title": "Naming alkenes examples", "description": "Naming Alkenes Examples", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KWv5PaoHwPA.mp4/KWv5PaoHwPA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KWv5PaoHwPA.mp4/KWv5PaoHwPA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KWv5PaoHwPA.m3u8/KWv5PaoHwPA.m3u8"}, "slug": "naming-alkenes-examples", "video_id": "KWv5PaoHwPA", "youtube_id": "KWv5PaoHwPA", "readable_id": "naming-alkenes-examples"}, "7HUYGoJ2bD0": {"duration": 676, "path": "khan/humanities/history/crashcourse-worldhistory/so-thats-where-that-comes-from-2/crash-course-world-history-05/", "keywords": "crash course", "id": "7HUYGoJ2bD0", "title": "Greeks and Persians", "description": "In which John compares and contrasts Greek civilization and the Persian Empire. Of course we're glad that Greek civilization spawned modern western civilization, right? Maybe not. From Socrates and Plato to Darius and Xerxes, John explains two of the great powers of the ancient world, all WITHOUT the use of footage from 300.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7HUYGoJ2bD0.mp4/7HUYGoJ2bD0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7HUYGoJ2bD0.mp4/7HUYGoJ2bD0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7HUYGoJ2bD0.m3u8/7HUYGoJ2bD0.m3u8"}, "slug": "crash-course-world-history-05", "video_id": "7HUYGoJ2bD0", "youtube_id": "7HUYGoJ2bD0", "readable_id": "crash-course-world-history-05"}, "kio82CqAEMw": {"duration": 145, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-4-14/", "keywords": "", "id": "kio82CqAEMw", "title": "14 Least possible value for variable", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kio82CqAEMw.mp4/kio82CqAEMw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kio82CqAEMw.mp4/kio82CqAEMw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kio82CqAEMw.m3u8/kio82CqAEMw.m3u8"}, "slug": "sat-2008-may-4-14", "video_id": "kio82CqAEMw", "youtube_id": "kio82CqAEMw", "readable_id": "sat-2008-may-4-14"}, "nrRJkzXl4a4": {"duration": 668, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/the-classical-orders/", "keywords": "art history", "id": "nrRJkzXl4a4", "title": "The classical orders", "description": "A conversation with Dr. Steven Zucker & Dr. Beth Harris\n\nIn classical architecture, the Orders consist of variations of an assembly of parts made up of a column (usually with a base), a capital, and an entablature. These structural units may be repeated and combined to form the elevation of a building and its architectural vocabulary.\n\nThere are eight Orders in total: Doric (Greek and Roman versions), Tuscan, Ionic (Greek and Roman), Corinthian (Greek and Roman), and Composite. The simplest is the Tuscan, supposedly derived from the Etruscan-type temple. It has a base and capital and a plain column. The Doric is probably earlier, however, its Greek version having no base, as on the Parthenon. The Ionic Order, with its twin volute capitals, originated in Asia Minor in the mid-6th century B.C.E. The Corinthian Order was an Athenian invention of the 5th century B.C.E. and was later developed by the Romans. The Composite Order is a late Roman combination of elements from the Ionic and Corinthian Orders.\n\nThe Concise Oxford Dictionary of Art Terms, Michael Clarke, Deborah Clarke. \u00a9 2012 Oxford University Press. Available at Oxford Art OnlineAncient Greece", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nrRJkzXl4a4.mp4/nrRJkzXl4a4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nrRJkzXl4a4.mp4/nrRJkzXl4a4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nrRJkzXl4a4.m3u8/nrRJkzXl4a4.m3u8"}, "slug": "the-classical-orders", "video_id": "nrRJkzXl4a4", "youtube_id": "nrRJkzXl4a4", "readable_id": "the-classical-orders"}, "JUgrBkPteTg": {"duration": 768, "path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/dimension-of-the-column-space-or-rank/", "keywords": "column, space, matrix, dimension, rank", "id": "JUgrBkPteTg", "title": "Dimension of the column space or rank", "description": "Dimension of the Column Space or Rank", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JUgrBkPteTg.mp4/JUgrBkPteTg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JUgrBkPteTg.mp4/JUgrBkPteTg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JUgrBkPteTg.m3u8/JUgrBkPteTg.m3u8"}, "slug": "dimension-of-the-column-space-or-rank", "video_id": "JUgrBkPteTg", "youtube_id": "JUgrBkPteTg", "readable_id": "dimension-of-the-column-space-or-rank"}, "oHvLlS_Sc54": {"duration": 761, "path": "khan/science/biology/her/tree-of-life/taxonomy-and-the-tree-of-life/", "keywords": "homo, sapiens, eukaryotes, primates, mammals, chordates", "id": "oHvLlS_Sc54", "title": "Taxonomy and the tree of life", "description": "The science of taxonomy and where humans fit into the tree of life", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oHvLlS_Sc54.mp4/oHvLlS_Sc54.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oHvLlS_Sc54.mp4/oHvLlS_Sc54.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oHvLlS_Sc54.m3u8/oHvLlS_Sc54.m3u8"}, "slug": "taxonomy-and-the-tree-of-life", "video_id": "oHvLlS_Sc54", "youtube_id": "oHvLlS_Sc54", "readable_id": "taxonomy-and-the-tree-of-life"}, "lzWUG4H5QBo": {"duration": 570, "path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/people-and-plants/", "keywords": "", "id": "lzWUG4H5QBo", "title": "People and plants", "description": "Learn more about photosynthesis and cellular respiration through a classic story: Jack and the Beanstalk. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lzWUG4H5QBo.mp4/lzWUG4H5QBo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lzWUG4H5QBo.mp4/lzWUG4H5QBo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lzWUG4H5QBo.m3u8/lzWUG4H5QBo.m3u8"}, "slug": "people-and-plants", "video_id": "lzWUG4H5QBo", "youtube_id": "lzWUG4H5QBo", "readable_id": "people-and-plants"}, "M3PTPN7NH8M": {"duration": 230, "path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/interpreting-features-of-functions-2-example-1/", "keywords": "", "id": "M3PTPN7NH8M", "title": "How to interpret the y-intercept of a graph in context (example)", "description": "Sal discusses the meaning of the y-intercept of the graph of a function that models the height of a ball.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M3PTPN7NH8M.mp4/M3PTPN7NH8M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M3PTPN7NH8M.mp4/M3PTPN7NH8M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M3PTPN7NH8M.m3u8/M3PTPN7NH8M.m3u8"}, "slug": "interpreting-features-of-functions-2-example-1", "video_id": "M3PTPN7NH8M", "youtube_id": "M3PTPN7NH8M", "readable_id": "interpreting-features-of-functions-2-example-1"}, "tOUys6vlTvE": {"duration": 478, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/acyanotic-heart-disasee-diagnosis/", "keywords": "", "id": "tOUys6vlTvE", "title": "Acyanotic heart disease diagnosis", "description": "How do we know a patient has an acyanotic heart disease? Learn how health care professionals use a variety of tools to diagnosis these conditions, such as stethoscopes, chest x-rays, echocardiogram, and electrocardiograms (ECG or EKG).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tOUys6vlTvE.mp4/tOUys6vlTvE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tOUys6vlTvE.mp4/tOUys6vlTvE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tOUys6vlTvE.m3u8/tOUys6vlTvE.m3u8"}, "slug": "acyanotic-heart-disasee-diagnosis", "video_id": "tOUys6vlTvE", "youtube_id": "tOUys6vlTvE", "readable_id": "acyanotic-heart-disasee-diagnosis"}, "Jdu1scUjIHQ": {"duration": 40, "path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/ss-campus-size-selectivity-financial-aid-college-search/", "keywords": "", "id": "Jdu1scUjIHQ", "title": "Student story: Prioritizing size, selectivity, diversity and financial aid in the college search", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Jdu1scUjIHQ.mp4/Jdu1scUjIHQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Jdu1scUjIHQ.mp4/Jdu1scUjIHQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Jdu1scUjIHQ.m3u8/Jdu1scUjIHQ.m3u8"}, "slug": "ss-campus-size-selectivity-financial-aid-college-search", "video_id": "Jdu1scUjIHQ", "youtube_id": "Jdu1scUjIHQ", "readable_id": "ss-campus-size-selectivity-financial-aid-college-search"}, "SQmyTmO8OKw": {"duration": 157, "path": "khan/math/early-math/cc-early-math-measure-data-topic/cc-early-math-length-intro/order-by-length/", "keywords": "", "id": "SQmyTmO8OKw", "title": "Order by length", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SQmyTmO8OKw.mp4/SQmyTmO8OKw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SQmyTmO8OKw.mp4/SQmyTmO8OKw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SQmyTmO8OKw.m3u8/SQmyTmO8OKw.m3u8"}, "slug": "order-by-length", "video_id": "SQmyTmO8OKw", "youtube_id": "SQmyTmO8OKw", "readable_id": "order-by-length"}, "XBPgPEo0Xx4": {"duration": 305, "path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/c-zanne-still-life-with-plaster-cupid-c-1895/", "keywords": "Paul C\u00e9zanne Cupid, Smarthistory, Art History, Impressionism", "id": "XBPgPEo0Xx4", "title": "C\u00e9zanne, Still Life with Plaster Cupid", "description": "Paul C\u00e9zanne, Still Life with Plaster Cupid, oil on canvas, c.1895 (Courtauld Gallery, London) Speakers: Beth Harris, Rachel Ropeik, and Steven Zucker For more: http://smarthistory.org/Cezannes-Still-Life-with-Apples.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XBPgPEo0Xx4.mp4/XBPgPEo0Xx4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XBPgPEo0Xx4.mp4/XBPgPEo0Xx4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XBPgPEo0Xx4.m3u8/XBPgPEo0Xx4.m3u8"}, "slug": "c-zanne-still-life-with-plaster-cupid-c-1895", "video_id": "XBPgPEo0Xx4", "youtube_id": "XBPgPEo0Xx4", "readable_id": "c-zanne-still-life-with-plaster-cupid-c-1895"}, "1uWZNW5PF-s": {"duration": 596, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/challenging-perimeter-problem/", "keywords": "geometry, AIME", "id": "1uWZNW5PF-s", "title": "Challenging perimeter problem", "description": "Perimeter of rectangle covered by 9 non-overlapping squares. From 2000 American Invitational Math Exam", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1uWZNW5PF-s.mp4/1uWZNW5PF-s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1uWZNW5PF-s.mp4/1uWZNW5PF-s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1uWZNW5PF-s.m3u8/1uWZNW5PF-s.m3u8"}, "slug": "challenging-perimeter-problem", "video_id": "1uWZNW5PF-s", "youtube_id": "1uWZNW5PF-s", "readable_id": "challenging-perimeter-problem"}, "K4RE-6AolEw": {"duration": 460, "path": "khan/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis/synthesis-of-substituted-benzene-rings-i/", "keywords": "", "id": "K4RE-6AolEw", "title": "Synthesis of substituted benzene rings I", "description": "Synthesis practice problems", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K4RE-6AolEw.mp4/K4RE-6AolEw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K4RE-6AolEw.mp4/K4RE-6AolEw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K4RE-6AolEw.m3u8/K4RE-6AolEw.m3u8"}, "slug": "synthesis-of-substituted-benzene-rings-i", "video_id": "K4RE-6AolEw", "youtube_id": "K4RE-6AolEw", "readable_id": "synthesis-of-substituted-benzene-rings-i"}, "zGO-MlsdmgU": {"duration": 515, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-preparation-epoxides/nomenclature-and-preparation-of-epoxides/", "keywords": "", "id": "zGO-MlsdmgU", "title": "Nomenclature and preparation of epoxides", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zGO-MlsdmgU.mp4/zGO-MlsdmgU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zGO-MlsdmgU.mp4/zGO-MlsdmgU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zGO-MlsdmgU.m3u8/zGO-MlsdmgU.m3u8"}, "slug": "nomenclature-and-preparation-of-epoxides", "video_id": "zGO-MlsdmgU", "youtube_id": "zGO-MlsdmgU", "readable_id": "nomenclature-and-preparation-of-epoxides"}, "A3vkqYgJ93c": {"duration": 228, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/pozzo-st-ignatius-chapel-il-gesu-rome-commissioned-in-1695/", "keywords": "rome, gesu, il gesu, baroque, smarthistory, context travel, ignatius", "id": "A3vkqYgJ93c", "title": "Pozzo, Saint Ignatius Chapel, Il Ges\u00f9", "description": "Andrea Pozzo, Saint Ignatius Chapel in the left transept of the church, Il Ges\u00f9, Rome (commissioned in 1695). \n\nMany artists contributed including Alessandro Algardi, Pierre Legros, Bernardino Ludovisi, Il Lorenzone and Jean-Baptiste Th\u00e9odon. \nMaterials include bronze, gold, silver, and many semiprecious stones most notably lapis lazuli. \n\nhttp://smarthistory.org/andrea-pozzos-saint-ignatius-chapel-in-church-il-gesu.html\nSpeakers: Frank Dabell, Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A3vkqYgJ93c.mp4/A3vkqYgJ93c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A3vkqYgJ93c.mp4/A3vkqYgJ93c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A3vkqYgJ93c.m3u8/A3vkqYgJ93c.m3u8"}, "slug": "pozzo-st-ignatius-chapel-il-gesu-rome-commissioned-in-1695", "video_id": "A3vkqYgJ93c", "youtube_id": "A3vkqYgJ93c", "readable_id": "pozzo-st-ignatius-chapel-il-gesu-rome-commissioned-in-1695"}, "ivg3dLTarbs": {"duration": 503, "path": "khan/math/multivariable-calculus/surface-integrals/3d_flux/conceputal-understanding-of-flux-in-three-dimensions/", "keywords": "surface, integral, vector, calculus", "id": "ivg3dLTarbs", "title": "Conceptual understanding of flux in three dimensions", "description": "Conceptual understanding of flux across a two-dimensional surface", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ivg3dLTarbs.mp4/ivg3dLTarbs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ivg3dLTarbs.mp4/ivg3dLTarbs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ivg3dLTarbs.m3u8/ivg3dLTarbs.m3u8"}, "slug": "conceputal-understanding-of-flux-in-three-dimensions", "video_id": "ivg3dLTarbs", "youtube_id": "ivg3dLTarbs", "readable_id": "conceputal-understanding-of-flux-in-three-dimensions"}, "j-rBgs_p-bg": {"duration": 758, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/oxidation-of-alcohols-i-mechanism-and-oxidation-states/", "keywords": "", "id": "j-rBgs_p-bg", "title": "Oxidation of alcohols I: Mechanism and oxidation states", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j-rBgs_p-bg.mp4/j-rBgs_p-bg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j-rBgs_p-bg.mp4/j-rBgs_p-bg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j-rBgs_p-bg.m3u8/j-rBgs_p-bg.m3u8"}, "slug": "oxidation-of-alcohols-i-mechanism-and-oxidation-states", "video_id": "j-rBgs_p-bg", "youtube_id": "j-rBgs_p-bg", "readable_id": "oxidation-of-alcohols-i-mechanism-and-oxidation-states"}, "gyqodNhM3EU": {"duration": 330, "path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/mega-millions-jackpot-probability/", "keywords": "probability, combinations, choose", "id": "gyqodNhM3EU", "title": "Mega millions jackpot probability", "description": "Probability of winning the Mega Millions jackpot", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gyqodNhM3EU.mp4/gyqodNhM3EU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gyqodNhM3EU.mp4/gyqodNhM3EU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gyqodNhM3EU.m3u8/gyqodNhM3EU.m3u8"}, "slug": "mega-millions-jackpot-probability", "video_id": "gyqodNhM3EU", "youtube_id": "gyqodNhM3EU", "readable_id": "mega-millions-jackpot-probability"}, "dirBYVjDk7A": {"duration": 389, "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/current-capital-account/balance-of-payments-current-account/", "keywords": "macroeconomics, current, account, capital, financial", "id": "dirBYVjDk7A", "title": "Balance of payments: Current account", "description": "Understanding the United States Current Account in 2011", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dirBYVjDk7A.mp4/dirBYVjDk7A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dirBYVjDk7A.mp4/dirBYVjDk7A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dirBYVjDk7A.m3u8/dirBYVjDk7A.m3u8"}, "slug": "balance-of-payments-current-account", "video_id": "dirBYVjDk7A", "youtube_id": "dirBYVjDk7A", "readable_id": "balance-of-payments-current-account"}, "qBYa_QOWuaE": {"duration": 607, "path": "khan/humanities/history/american-civics/american-civics/pension-obligations/", "keywords": "pension, underfunded, defined benefit, defined contribution, marquee", "id": "qBYa_QOWuaE", "title": "Pension obligations", "description": "Thinking about pensions, defined benefit plans, defined contribution plans and how pensions tend to get underfunded", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qBYa_QOWuaE.mp4/qBYa_QOWuaE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qBYa_QOWuaE.mp4/qBYa_QOWuaE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qBYa_QOWuaE.m3u8/qBYa_QOWuaE.m3u8"}, "slug": "pension-obligations", "video_id": "qBYa_QOWuaE", "youtube_id": "qBYa_QOWuaE", "readable_id": "pension-obligations"}, "ppBJWf_Wdmc": {"duration": 448, "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-1a/", "keywords": "calculus, AP, 2011, advanced, placement", "id": "ppBJWf_Wdmc", "title": "2011 Calculus AB free response #1a", "description": "Determining whether speed is increasing. Difference between speed and acceleration", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ppBJWf_Wdmc.mp4/ppBJWf_Wdmc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ppBJWf_Wdmc.mp4/ppBJWf_Wdmc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ppBJWf_Wdmc.m3u8/ppBJWf_Wdmc.m3u8"}, "slug": "2011-calculus-ab-free-response-1a", "video_id": "ppBJWf_Wdmc", "youtube_id": "ppBJWf_Wdmc", "readable_id": "2011-calculus-ab-free-response-1a"}, "el6nuUsff84": {"duration": 424, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/electrocardioversion/", "keywords": "", "id": "el6nuUsff84", "title": "Electrocardioversion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/el6nuUsff84.mp4/el6nuUsff84.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/el6nuUsff84.mp4/el6nuUsff84.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/el6nuUsff84.m3u8/el6nuUsff84.m3u8"}, "slug": "electrocardioversion", "video_id": "el6nuUsff84", "youtube_id": "el6nuUsff84", "readable_id": "electrocardioversion"}, "PP7T8vpT2KI": {"duration": 775, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e2-elimination-substituted-cyclohexanes/", "keywords": "", "id": "PP7T8vpT2KI", "title": "E2 elimination: Substituted cyclohexanes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PP7T8vpT2KI.mp4/PP7T8vpT2KI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PP7T8vpT2KI.mp4/PP7T8vpT2KI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PP7T8vpT2KI.m3u8/PP7T8vpT2KI.m3u8"}, "slug": "e2-elimination-substituted-cyclohexanes", "video_id": "PP7T8vpT2KI", "youtube_id": "PP7T8vpT2KI", "readable_id": "e2-elimination-substituted-cyclohexanes"}, "SuB1gkto9LU": {"duration": 396, "path": "khan/math/algebra/systems-of-linear-equations/analyzing-the-solutions-to-systems-of-equations/practice-thinking-about-number-of-solutions-to-systems/", "keywords": "", "id": "SuB1gkto9LU", "title": "How to determine the number of solutions of a system of equations by considering its graph (example)", "description": "Sal determines how many solutions the following system of equations has by considering its graph: 10x-2y=4 and 10x-2y=16.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SuB1gkto9LU.mp4/SuB1gkto9LU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SuB1gkto9LU.mp4/SuB1gkto9LU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SuB1gkto9LU.m3u8/SuB1gkto9LU.m3u8"}, "slug": "practice-thinking-about-number-of-solutions-to-systems", "video_id": "SuB1gkto9LU", "youtube_id": "SuB1gkto9LU", "readable_id": "practice-thinking-about-number-of-solutions-to-systems"}, "V-_H-6bXw8E": {"duration": 468, "path": "khan/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/sat-writing-test-intro/", "keywords": "", "id": "V-_H-6bXw8E", "title": "Introduction to the SAT Writing & Language test", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/V-_H-6bXw8E.mp4/V-_H-6bXw8E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/V-_H-6bXw8E.mp4/V-_H-6bXw8E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/V-_H-6bXw8E.m3u8/V-_H-6bXw8E.m3u8"}, "slug": "sat-writing-test-intro", "video_id": "V-_H-6bXw8E", "youtube_id": "V-_H-6bXw8E", "readable_id": "sat-writing-test-intro"}, "MEN0CzGv5-Y": {"duration": 243, "path": "khan/humanities/art-asia/imperial-china/beginners-guide-imperial-china/appreciating-chinese-calligraphy/", "keywords": "", "id": "MEN0CzGv5-Y", "title": "Appreciating Chinese calligraphy", "description": "Discover the art of Chinese calligraphy. Try your hand at brushpainting in this digital interactive.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MEN0CzGv5-Y.mp4/MEN0CzGv5-Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MEN0CzGv5-Y.mp4/MEN0CzGv5-Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MEN0CzGv5-Y.m3u8/MEN0CzGv5-Y.m3u8"}, "slug": "appreciating-chinese-calligraphy", "video_id": "MEN0CzGv5-Y", "youtube_id": "MEN0CzGv5-Y", "readable_id": "appreciating-chinese-calligraphy"}, "595Tiga1gIg": {"duration": 553, "path": "khan/test-prep/mcat/physical-processes/vectors-and-scalars/unit-vector-notation-part-2/", "keywords": "adding, vectors, physics, calculus", "id": "595Tiga1gIg", "title": "Unit vector notation (part 2)", "description": "More on unit vector notation. Showing that adding the x and y components of two vectors is equivalent to adding the vectors visually using the head-to-tail method", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/595Tiga1gIg.mp4/595Tiga1gIg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/595Tiga1gIg.mp4/595Tiga1gIg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/595Tiga1gIg.m3u8/595Tiga1gIg.m3u8"}, "slug": "unit-vector-notation-part-2", "video_id": "595Tiga1gIg", "youtube_id": "595Tiga1gIg", "readable_id": "unit-vector-notation-part-2"}, "6nVysrZQnOQ": {"duration": 999, "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/radius-of-observable-universe/", "keywords": "Radius, of, Observable, Universe, cosmos, cosmology, astronomy", "id": "6nVysrZQnOQ", "title": "Radius of observable universe", "description": "Radius of Observable Universe", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6nVysrZQnOQ.mp4/6nVysrZQnOQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6nVysrZQnOQ.mp4/6nVysrZQnOQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6nVysrZQnOQ.m3u8/6nVysrZQnOQ.m3u8"}, "slug": "radius-of-observable-universe", "video_id": "6nVysrZQnOQ", "youtube_id": "6nVysrZQnOQ", "readable_id": "radius-of-observable-universe"}, "lMfJSBsng3Y": {"duration": 69, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-may-2010-4-1/", "keywords": "", "id": "lMfJSBsng3Y", "title": "1 Constructing and solving simple equation", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lMfJSBsng3Y.mp4/lMfJSBsng3Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lMfJSBsng3Y.mp4/lMfJSBsng3Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lMfJSBsng3Y.m3u8/lMfJSBsng3Y.m3u8"}, "slug": "sat-may-2010-4-1", "video_id": "lMfJSBsng3Y", "youtube_id": "lMfJSBsng3Y", "readable_id": "sat-may-2010-4-1"}, "91x5bPf2Eag": {"duration": 330, "path": "khan/humanities/art-asia/art-japan/kamakura-period/samurai-armor/", "keywords": "", "id": "91x5bPf2Eag", "title": "A brief history of samurai armor", "description": "Learn about samurai armor by exploring artworks in the Asian Art Museum's collection. Learn more about samurai armor on the Asian Art Museum's education website.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/91x5bPf2Eag.mp4/91x5bPf2Eag.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/91x5bPf2Eag.mp4/91x5bPf2Eag.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/91x5bPf2Eag.m3u8/91x5bPf2Eag.m3u8"}, "slug": "samurai-armor", "video_id": "91x5bPf2Eag", "youtube_id": "91x5bPf2Eag", "readable_id": "samurai-armor"}, "XjoJ9UF2hqg": {"duration": 582, "path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/collateralized-debt-obligation-cdo/", "keywords": "finance, CDO, MBS, khan, academy", "id": "XjoJ9UF2hqg", "title": "Collateralized debt obligation (CDO)", "description": "Introduction to collateralized debt obligations (to be listen to after series on mortgage-backed securities.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XjoJ9UF2hqg.mp4/XjoJ9UF2hqg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XjoJ9UF2hqg.mp4/XjoJ9UF2hqg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XjoJ9UF2hqg.m3u8/XjoJ9UF2hqg.m3u8"}, "slug": "collateralized-debt-obligation-cdo", "video_id": "XjoJ9UF2hqg", "youtube_id": "XjoJ9UF2hqg", "readable_id": "collateralized-debt-obligation-cdo"}, "e9cKwLhM0VU": {"duration": 48, "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-decisions-overview/sscc-blended-hardsoftintro/", "keywords": "", "id": "e9cKwLhM0VU", "title": "Hardware, software and space: intro and big ideas", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e9cKwLhM0VU.mp4/e9cKwLhM0VU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e9cKwLhM0VU.mp4/e9cKwLhM0VU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e9cKwLhM0VU.m3u8/e9cKwLhM0VU.m3u8"}, "slug": "sscc-blended-hardsoftintro", "video_id": "e9cKwLhM0VU", "youtube_id": "e9cKwLhM0VU", "readable_id": "sscc-blended-hardsoftintro"}, "FHptu3tcJnM": {"duration": 823, "path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/friedel-crafts-alkylation/", "keywords": "", "id": "FHptu3tcJnM", "title": "Friedel-Crafts alkylation", "description": "The mechanism of alkylation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FHptu3tcJnM.mp4/FHptu3tcJnM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FHptu3tcJnM.mp4/FHptu3tcJnM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FHptu3tcJnM.m3u8/FHptu3tcJnM.m3u8"}, "slug": "friedel-crafts-alkylation", "video_id": "FHptu3tcJnM", "youtube_id": "FHptu3tcJnM", "readable_id": "friedel-crafts-alkylation"}, "W-OskAegz5o": {"duration": 354, "path": "khan/computing/computer-science/informationtheory/moderninfotheory/intro-to-channel-capacity-information-theory/", "keywords": "channel capacity", "id": "W-OskAegz5o", "title": "Introduction to channel capacity", "description": "Introduction to Channel Capacity & Message Space", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W-OskAegz5o.mp4/W-OskAegz5o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W-OskAegz5o.mp4/W-OskAegz5o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W-OskAegz5o.m3u8/W-OskAegz5o.m3u8"}, "slug": "intro-to-channel-capacity-information-theory", "video_id": "W-OskAegz5o", "youtube_id": "W-OskAegz5o", "readable_id": "intro-to-channel-capacity-information-theory"}, "TlxSlwQiYgM": {"duration": 92, "path": "khan/partner-content/pixar/animate/parametric-curves/animation7/", "keywords": "", "id": "TlxSlwQiYgM", "title": "3. de Castlejau's algorithm", "description": "We can use de Castlejau's algorithm to calculate curves using any number of points.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TlxSlwQiYgM.mp4/TlxSlwQiYgM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TlxSlwQiYgM.mp4/TlxSlwQiYgM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TlxSlwQiYgM.m3u8/TlxSlwQiYgM.m3u8"}, "slug": "animation7", "video_id": "TlxSlwQiYgM", "youtube_id": "TlxSlwQiYgM", "readable_id": "animation7"}, "cDq1_R-J51w": {"duration": 299, "path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/components-of-attitude/", "keywords": "", "id": "cDq1_R-J51w", "title": "Components of attitudes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cDq1_R-J51w.mp4/cDq1_R-J51w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cDq1_R-J51w.mp4/cDq1_R-J51w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cDq1_R-J51w.m3u8/cDq1_R-J51w.m3u8"}, "slug": "components-of-attitude", "video_id": "cDq1_R-J51w", "youtube_id": "cDq1_R-J51w", "readable_id": "components-of-attitude"}, "3NYhESueUfE": {"duration": 116, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/bottle-rocket-apps/calvin-carter-4/", "keywords": "", "id": "3NYhESueUfE", "title": "Making money making apps", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3NYhESueUfE.mp4/3NYhESueUfE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3NYhESueUfE.mp4/3NYhESueUfE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3NYhESueUfE.m3u8/3NYhESueUfE.m3u8"}, "slug": "calvin-carter-4", "video_id": "3NYhESueUfE", "youtube_id": "3NYhESueUfE", "readable_id": "calvin-carter-4"}, "cdMF0cyuWfw": {"duration": 96, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p11-easier/", "keywords": "", "id": "cdMF0cyuWfw", "title": "Polynomial factors and graphs \u2014 Basic example", "description": "Watch Sal work through a basic Polynomial factors and graphs problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cdMF0cyuWfw.mp4/cdMF0cyuWfw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cdMF0cyuWfw.mp4/cdMF0cyuWfw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cdMF0cyuWfw.m3u8/cdMF0cyuWfw.m3u8"}, "slug": "sat-math-p11-easier", "video_id": "cdMF0cyuWfw", "youtube_id": "cdMF0cyuWfw", "readable_id": "sat-math-p11-easier"}, "dN5XRW7T0cc": {"duration": 205, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/part-2-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220/", "keywords": "", "id": "dN5XRW7T0cc", "title": "Cathedral of Notre Dame de Chartres (part 2)", "description": "Part 2: Cathedral of Notre Dame de Chartres, c.1145 and 1194-c.1220 This video (2 of 3), focuses on the cathedral's interior, its stained glass, nave, aisles, elevation, and choir Speakers: Dr. Beth Harris and Dr. Steven Zucker For more: http://smarthistory.org/Gothic.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dN5XRW7T0cc.mp4/dN5XRW7T0cc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dN5XRW7T0cc.mp4/dN5XRW7T0cc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dN5XRW7T0cc.m3u8/dN5XRW7T0cc.m3u8"}, "slug": "part-2-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220", "video_id": "dN5XRW7T0cc", "youtube_id": "dN5XRW7T0cc", "readable_id": "part-2-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220"}, "VQniy8iq9EQ": {"duration": 191, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/sir-edward-coley-burne-jones-the-golden-stairs-1880/", "keywords": "Burne-Jones, Golden Stairs, Pre-Raphaelite, Music, Aesthetic movement, Khan Academy, smarthistory, art history, Google Art Project, OER, Tate Britain, London", "id": "VQniy8iq9EQ", "title": "Burne-Jones, The Golden Stairs", "description": "Sir Edward Coley Burne-Jones, The Golden Stairs, 1880, oil on canvas\n2692 x 1168 mm (Tate Britain, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VQniy8iq9EQ.mp4/VQniy8iq9EQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VQniy8iq9EQ.mp4/VQniy8iq9EQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VQniy8iq9EQ.m3u8/VQniy8iq9EQ.m3u8"}, "slug": "sir-edward-coley-burne-jones-the-golden-stairs-1880", "video_id": "VQniy8iq9EQ", "youtube_id": "VQniy8iq9EQ", "readable_id": "sir-edward-coley-burne-jones-the-golden-stairs-1880"}, "DRg2VCo8lP0": {"duration": 320, "path": "khan/math/pre-algebra/measurement/area-basics/rectangle-area-as-product-of-dimensions-same-as-counting-unit-squares/", "keywords": "", "id": "DRg2VCo8lP0", "title": "Rectangle area as product of dimensions same as counting unit squares", "description": "Use unit squares to see why multiplying side-lengths can also find the area of rectangles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DRg2VCo8lP0.mp4/DRg2VCo8lP0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DRg2VCo8lP0.mp4/DRg2VCo8lP0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DRg2VCo8lP0.m3u8/DRg2VCo8lP0.m3u8"}, "slug": "rectangle-area-as-product-of-dimensions-same-as-counting-unit-squares", "video_id": "DRg2VCo8lP0", "youtube_id": "DRg2VCo8lP0", "readable_id": "rectangle-area-as-product-of-dimensions-same-as-counting-unit-squares"}, "INqaHHZGt8w": {"duration": 215, "path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/reflecting-points-exercise/", "keywords": "", "id": "INqaHHZGt8w", "title": "Coordinate plane: reflecting points", "description": "Just like looking at a mirror image of yourself, but flipped....a reflection point is the mirror point on the opposite axis. Watch this tutorial and reflect :)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/INqaHHZGt8w.mp4/INqaHHZGt8w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/INqaHHZGt8w.mp4/INqaHHZGt8w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/INqaHHZGt8w.m3u8/INqaHHZGt8w.m3u8"}, "slug": "reflecting-points-exercise", "video_id": "INqaHHZGt8w", "youtube_id": "INqaHHZGt8w", "readable_id": "reflecting-points-exercise"}, "8r8Vp_1iB4k": {"duration": 437, "path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/slope-of-a-line-secant-to-a-curve/", "keywords": "", "id": "8r8Vp_1iB4k", "title": "Slope of a line secant to a curve", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8r8Vp_1iB4k.mp4/8r8Vp_1iB4k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8r8Vp_1iB4k.mp4/8r8Vp_1iB4k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8r8Vp_1iB4k.m3u8/8r8Vp_1iB4k.m3u8"}, "slug": "slope-of-a-line-secant-to-a-curve", "video_id": "8r8Vp_1iB4k", "youtube_id": "8r8Vp_1iB4k", "readable_id": "slope-of-a-line-secant-to-a-curve"}, "cdxMX-gajac": {"duration": 648, "path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/biodiversity-fieldwork/biodiversity-expeditions-field-methods/", "keywords": "", "id": "cdxMX-gajac", "title": "Field Methods for Documenting Biodiversity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cdxMX-gajac.mp4/cdxMX-gajac.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cdxMX-gajac.mp4/cdxMX-gajac.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cdxMX-gajac.m3u8/cdxMX-gajac.m3u8"}, "slug": "biodiversity-expeditions-field-methods", "video_id": "cdxMX-gajac", "youtube_id": "cdxMX-gajac", "readable_id": "biodiversity-expeditions-field-methods"}, "X1E7I7_r3Cw": {"duration": 530, "path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/what-was-up-with-pythagoras/", "keywords": "pythagoras, pythagoreans, sqrt 2, square root, irrational numbers, rational numbers, ratio, mathematics, numbers, proof", "id": "X1E7I7_r3Cw", "title": "What was up with Pythagoras?", "description": "Pythagoras had a problem with beans and irrationality. What really happened? I don't know! The square root of two is irrational, and beans are delicious.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X1E7I7_r3Cw.mp4/X1E7I7_r3Cw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X1E7I7_r3Cw.mp4/X1E7I7_r3Cw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X1E7I7_r3Cw.m3u8/X1E7I7_r3Cw.m3u8"}, "slug": "what-was-up-with-pythagoras", "video_id": "X1E7I7_r3Cw", "youtube_id": "X1E7I7_r3Cw", "readable_id": "what-was-up-with-pythagoras"}, "j_s5p0mLZ7s": {"duration": 460, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/shock-hemodynamics/", "keywords": "", "id": "j_s5p0mLZ7s", "title": "Shock - hemodynamics", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j_s5p0mLZ7s.mp4/j_s5p0mLZ7s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j_s5p0mLZ7s.mp4/j_s5p0mLZ7s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j_s5p0mLZ7s.m3u8/j_s5p0mLZ7s.m3u8"}, "slug": "shock-hemodynamics", "video_id": "j_s5p0mLZ7s", "youtube_id": "j_s5p0mLZ7s", "readable_id": "shock-hemodynamics"}, "rccqylTloMs": {"duration": 166, "path": "khan/math/differential-calculus/limits_topic/calculus-estimating-limits-graph/2-sided-limit-from-graph/", "keywords": "", "id": "rccqylTloMs", "title": "Two-sided limit from graph", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rccqylTloMs.mp4/rccqylTloMs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rccqylTloMs.mp4/rccqylTloMs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rccqylTloMs.m3u8/rccqylTloMs.m3u8"}, "slug": "2-sided-limit-from-graph", "video_id": "rccqylTloMs", "youtube_id": "rccqylTloMs", "readable_id": "2-sided-limit-from-graph"}, "lWDtFHDVqqk": {"duration": 612, "path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/fluids-part-2/", "keywords": "physics, chemistry, pascal's, pressure, work, fluid, liquid", "id": "lWDtFHDVqqk", "title": "Pressure and Pascal's principle (part 2)", "description": "Sal finishes the calculation or work to determine the mechanical advantage in a U-shaped tube. He also explains pressure and Pascal's Principal.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lWDtFHDVqqk.mp4/lWDtFHDVqqk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lWDtFHDVqqk.mp4/lWDtFHDVqqk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lWDtFHDVqqk.m3u8/lWDtFHDVqqk.m3u8"}, "slug": "fluids-part-2", "video_id": "lWDtFHDVqqk", "youtube_id": "lWDtFHDVqqk", "readable_id": "fluids-part-2"}, "QEA30X4ysvg": {"duration": 263, "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-galatea-c-1513/", "keywords": "art history, Raphael (Painter), khan academy, Smarthistory, Villa Farnesina, Rome, Renaissance", "id": "QEA30X4ysvg", "title": "Raphael, Galatea", "description": "Raphael, Galatea, c. 1513, fresco, Villa Farnesina, Rome, 9' 8\" x 7' 5\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QEA30X4ysvg.mp4/QEA30X4ysvg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QEA30X4ysvg.mp4/QEA30X4ysvg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QEA30X4ysvg.m3u8/QEA30X4ysvg.m3u8"}, "slug": "raphael-galatea-c-1513", "video_id": "QEA30X4ysvg", "youtube_id": "QEA30X4ysvg", "readable_id": "raphael-galatea-c-1513"}, "fy_muPF0390": {"duration": 685, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/blood-pressure-changes-over-time/", "keywords": "", "id": "fy_muPF0390", "title": "Blood pressure changes over time", "description": "See how increasing resistance in the blood vessels can cause blood pressure to rise over time. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fy_muPF0390.mp4/fy_muPF0390.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fy_muPF0390.mp4/fy_muPF0390.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fy_muPF0390.m3u8/fy_muPF0390.m3u8"}, "slug": "blood-pressure-changes-over-time", "video_id": "fy_muPF0390", "youtube_id": "fy_muPF0390", "readable_id": "blood-pressure-changes-over-time"}, "52ZlXsFJULI": {"duration": 590, "path": "khan/math/pre-algebra/fractions-pre-alg/fractions-unlike-denom-pre-alg/adding-and-subtracting-fractions/", "keywords": "Math, fractions, adding, subtracting, CC_4_MD_2, CC_4_NF_3_a, CC_4_NF_3_b, CC_4_NF_3_d, CC_5_NF_1, CC_5_NF_2, CC_7_NS_1, CC_7_NS_1_d", "id": "52ZlXsFJULI", "title": "Adding and subtracting fractions", "description": "How to add and subtract fractions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/52ZlXsFJULI.mp4/52ZlXsFJULI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/52ZlXsFJULI.mp4/52ZlXsFJULI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/52ZlXsFJULI.m3u8/52ZlXsFJULI.m3u8"}, "slug": "adding-and-subtracting-fractions", "video_id": "52ZlXsFJULI", "youtube_id": "52ZlXsFJULI", "readable_id": "adding-and-subtracting-fractions"}, "OnlHXSBv0M4": {"duration": 719, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/diagnosis-of-pregnancy/", "keywords": "", "id": "OnlHXSBv0M4", "title": "Diagnosis of pregnancy", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OnlHXSBv0M4.mp4/OnlHXSBv0M4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OnlHXSBv0M4.mp4/OnlHXSBv0M4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OnlHXSBv0M4.m3u8/OnlHXSBv0M4.m3u8"}, "slug": "diagnosis-of-pregnancy", "video_id": "OnlHXSBv0M4", "youtube_id": "OnlHXSBv0M4", "readable_id": "diagnosis-of-pregnancy"}, "DRz9B6SHWQ4": {"duration": 187, "path": "khan/science/discoveries-projects/robots/bit-zee/attaching-bit-zee-s-prototype-board/", "keywords": "bread board, prototype board, connections, bit-zee", "id": "DRz9B6SHWQ4", "title": "Prototype board", "description": "In this video we attach Bit-zee's bread board", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DRz9B6SHWQ4.mp4/DRz9B6SHWQ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DRz9B6SHWQ4.mp4/DRz9B6SHWQ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DRz9B6SHWQ4.m3u8/DRz9B6SHWQ4.m3u8"}, "slug": "attaching-bit-zee-s-prototype-board", "video_id": "DRz9B6SHWQ4", "youtube_id": "DRz9B6SHWQ4", "readable_id": "attaching-bit-zee-s-prototype-board"}, "XOxsjdB4-ZQ": {"duration": 401, "path": "khan/partner-content/cas-biodiversity/biodiversity-levels/genetic/genes-and-biodiversity/", "keywords": "", "id": "XOxsjdB4-ZQ", "title": "Genes and biodiversity", "description": "How does the gene pool contribute to biodiversity? Learn how\u00a0genetic diversity within populations contributes to species survival.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XOxsjdB4-ZQ.mp4/XOxsjdB4-ZQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XOxsjdB4-ZQ.mp4/XOxsjdB4-ZQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XOxsjdB4-ZQ.m3u8/XOxsjdB4-ZQ.m3u8"}, "slug": "genes-and-biodiversity", "video_id": "XOxsjdB4-ZQ", "youtube_id": "XOxsjdB4-ZQ", "readable_id": "genes-and-biodiversity"}, "h-31O7CaF2o": {"duration": 650, "path": "khan/science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas/specific-heat-of-water/", "keywords": "education,online learning,learning,lessons,Heat Capacity (Dimension)", "id": "h-31O7CaF2o", "title": "Specific heat of water", "description": "Specific heat of water. A calorie as the specific heat of water. How water moderates temperature.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h-31O7CaF2o.mp4/h-31O7CaF2o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h-31O7CaF2o.mp4/h-31O7CaF2o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h-31O7CaF2o.m3u8/h-31O7CaF2o.m3u8"}, "slug": "specific-heat-of-water", "video_id": "h-31O7CaF2o", "youtube_id": "h-31O7CaF2o", "readable_id": "specific-heat-of-water"}, "GZx3U0dbASg": {"duration": 571, "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/scale-of-earth-and-sun/", "keywords": "Scale, of, Earth, and, Sun", "id": "GZx3U0dbASg", "title": "Scale of earth and sun", "description": "Scale of Earth and Sun", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GZx3U0dbASg.mp4/GZx3U0dbASg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GZx3U0dbASg.mp4/GZx3U0dbASg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GZx3U0dbASg.m3u8/GZx3U0dbASg.m3u8"}, "slug": "scale-of-earth-and-sun", "video_id": "GZx3U0dbASg", "youtube_id": "GZx3U0dbASg", "readable_id": "scale-of-earth-and-sun"}, "slIX9EDcHgE": {"duration": 156, "path": "khan/math/arithmetic/addition-subtraction/sub_borrowing/subtracting-2-digit-numbers-without-regrouping/", "keywords": "", "id": "slIX9EDcHgE", "title": "Subtracting two-digit numbers without regrouping (example 1)", "description": "Learn how to subtract 23 from 65 by thinking about tens and ones.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/slIX9EDcHgE.mp4/slIX9EDcHgE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/slIX9EDcHgE.mp4/slIX9EDcHgE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/slIX9EDcHgE.m3u8/slIX9EDcHgE.m3u8"}, "slug": "subtracting-2-digit-numbers-without-regrouping", "video_id": "slIX9EDcHgE", "youtube_id": "slIX9EDcHgE", "readable_id": "subtracting-2-digit-numbers-without-regrouping"}, "N8h45mDI80s": {"duration": 184, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/call-option-as-leverage/", "keywords": "Call, Option, as, Leverage", "id": "N8h45mDI80s", "title": "Call option as leverage", "description": "Call Option as Leverage", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N8h45mDI80s.mp4/N8h45mDI80s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N8h45mDI80s.mp4/N8h45mDI80s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N8h45mDI80s.m3u8/N8h45mDI80s.m3u8"}, "slug": "call-option-as-leverage", "video_id": "N8h45mDI80s", "youtube_id": "N8h45mDI80s", "readable_id": "call-option-as-leverage"}, "jFazrvLodrA": {"duration": 248, "path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/connection-between-even-and-odd-numbers-and-functions/", "keywords": "even, odd, functions, CC_39336_F-BF_3", "id": "jFazrvLodrA", "title": "Connection between even and odd numbers and functions", "description": "A possible reason why even functions are called \"even\" and odd functions are called \"odd\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jFazrvLodrA.mp4/jFazrvLodrA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jFazrvLodrA.mp4/jFazrvLodrA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jFazrvLodrA.m3u8/jFazrvLodrA.m3u8"}, "slug": "connection-between-even-and-odd-numbers-and-functions", "video_id": "jFazrvLodrA", "youtube_id": "jFazrvLodrA", "readable_id": "connection-between-even-and-odd-numbers-and-functions"}, "LJqNdG6Y2cM": {"duration": 437, "path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/integration-by-parts-of-e-x-cos-x-1/", "keywords": "", "id": "LJqNdG6Y2cM", "title": "Integration by parts of (e^x)(cos x)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LJqNdG6Y2cM.mp4/LJqNdG6Y2cM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LJqNdG6Y2cM.mp4/LJqNdG6Y2cM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LJqNdG6Y2cM.m3u8/LJqNdG6Y2cM.m3u8"}, "slug": "integration-by-parts-of-e-x-cos-x-1", "video_id": "LJqNdG6Y2cM", "youtube_id": "LJqNdG6Y2cM", "readable_id": "integration-by-parts-of-e-x-cos-x-1"}, "q3qvkZxhchE": {"duration": 151, "path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/same-integration-bounds/", "keywords": "", "id": "q3qvkZxhchE", "title": "Definite integral from and to same point", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q3qvkZxhchE.mp4/q3qvkZxhchE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q3qvkZxhchE.mp4/q3qvkZxhchE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q3qvkZxhchE.m3u8/q3qvkZxhchE.m3u8"}, "slug": "same-integration-bounds", "video_id": "q3qvkZxhchE", "youtube_id": "q3qvkZxhchE", "readable_id": "same-integration-bounds"}, "R-NeYKSEqns": {"duration": 408, "path": "khan/math/probability/independent-dependent-probability/dependent_probability/independent-dependent-probability/", "keywords": "", "id": "R-NeYKSEqns", "title": "Analyzing event probability for independence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R-NeYKSEqns.mp4/R-NeYKSEqns.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R-NeYKSEqns.mp4/R-NeYKSEqns.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R-NeYKSEqns.m3u8/R-NeYKSEqns.m3u8"}, "slug": "independent-dependent-probability", "video_id": "R-NeYKSEqns", "youtube_id": "R-NeYKSEqns", "readable_id": "independent-dependent-probability"}, "5K8U9QOj_TE": {"duration": 77, "path": "khan/science/discoveries-projects/discoveries/measure-magnets/earth-s-magnetic-field-/", "keywords": "Earth's magnetic field", "id": "5K8U9QOj_TE", "title": "Earth's magnetic field (how to measure)", "description": "How can we describe the strength of the Earth's magnetic field using a magnet and a compass? What does this tell us?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5K8U9QOj_TE.mp4/5K8U9QOj_TE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5K8U9QOj_TE.mp4/5K8U9QOj_TE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5K8U9QOj_TE.m3u8/5K8U9QOj_TE.m3u8"}, "slug": "earth-s-magnetic-field-", "video_id": "5K8U9QOj_TE", "youtube_id": "5K8U9QOj_TE", "readable_id": "earth-s-magnetic-field-"}, "LOf8bfjiLow": {"duration": 282, "path": "khan/math/precalculus/precalc-matrices/zero-identity-matrix-tutorial/zero-matrix/", "keywords": "", "id": "LOf8bfjiLow", "title": "Zero matrix", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LOf8bfjiLow.mp4/LOf8bfjiLow.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LOf8bfjiLow.mp4/LOf8bfjiLow.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LOf8bfjiLow.m3u8/LOf8bfjiLow.m3u8"}, "slug": "zero-matrix", "video_id": "LOf8bfjiLow", "youtube_id": "LOf8bfjiLow", "readable_id": "zero-matrix"}, "-83vVeSC2_g": {"duration": 342, "path": "khan/test-prep/mcat/society-and-culture/social-structures/functionalism/", "keywords": "funtionalism", "id": "-83vVeSC2_g", "title": "Functionalism", "description": "Functionalism is a theory of society that focuses on the structures that create the society and on how the society is able to remain stable. By Sydney Brown.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-83vVeSC2_g.mp4/-83vVeSC2_g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-83vVeSC2_g.mp4/-83vVeSC2_g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-83vVeSC2_g.m3u8/-83vVeSC2_g.m3u8"}, "slug": "functionalism", "video_id": "-83vVeSC2_g", "youtube_id": "-83vVeSC2_g", "readable_id": "functionalism"}, "FsO3A07Abak": {"duration": 312, "path": "khan/humanities/art-asia/art-japan/edo-period/conserving-gan-ku-tiger-scroll/", "keywords": "", "id": "FsO3A07Abak", "title": "Conserving the Gan Ku Tiger scroll painting at the British Museum", "description": "\u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FsO3A07Abak.mp4/FsO3A07Abak.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FsO3A07Abak.mp4/FsO3A07Abak.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FsO3A07Abak.m3u8/FsO3A07Abak.m3u8"}, "slug": "conserving-gan-ku-tiger-scroll", "video_id": "FsO3A07Abak", "youtube_id": "FsO3A07Abak", "readable_id": "conserving-gan-ku-tiger-scroll"}, "obmqVC07vRs": {"duration": 682, "path": "khan/partner-content/big-history-project/acceleration/changing-economies/bhp-how-modern-world-created/", "keywords": "", "id": "obmqVC07vRs", "title": "How Was the Modern World Created?", "description": "Three forces of change gather momentum and help create the modern world, transforming the biosphere.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/obmqVC07vRs.mp4/obmqVC07vRs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/obmqVC07vRs.mp4/obmqVC07vRs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/obmqVC07vRs.m3u8/obmqVC07vRs.m3u8"}, "slug": "bhp-how-modern-world-created", "video_id": "obmqVC07vRs", "youtube_id": "obmqVC07vRs", "readable_id": "bhp-how-modern-world-created"}, "XLoLvz0r550": {"duration": 654, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/transport-of-sperm-via-erection-and-ejaculation/", "keywords": "", "id": "XLoLvz0r550", "title": "Transport of sperm via erection and ejaculation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XLoLvz0r550.mp4/XLoLvz0r550.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XLoLvz0r550.mp4/XLoLvz0r550.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XLoLvz0r550.m3u8/XLoLvz0r550.m3u8"}, "slug": "transport-of-sperm-via-erection-and-ejaculation", "video_id": "XLoLvz0r550", "youtube_id": "XLoLvz0r550", "readable_id": "transport-of-sperm-via-erection-and-ejaculation"}, "EAa3J_nDkoI": {"duration": 344, "path": "khan/math/differential-calculus/limits_topic/algebraic-limits/limit-example-1/", "keywords": "", "id": "EAa3J_nDkoI", "title": "Limit example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EAa3J_nDkoI.mp4/EAa3J_nDkoI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EAa3J_nDkoI.mp4/EAa3J_nDkoI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EAa3J_nDkoI.m3u8/EAa3J_nDkoI.m3u8"}, "slug": "limit-example-1", "video_id": "EAa3J_nDkoI", "youtube_id": "EAa3J_nDkoI", "readable_id": "limit-example-1"}, "UhIwMAhZpCo": {"duration": 401, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/lifecycle-of-massive-stars/", "keywords": "Lifecycle, of, Massive, Stars", "id": "UhIwMAhZpCo", "title": "Lifecycle of massive stars", "description": "Lifecycle of Massive Stars", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UhIwMAhZpCo.mp4/UhIwMAhZpCo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UhIwMAhZpCo.mp4/UhIwMAhZpCo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UhIwMAhZpCo.m3u8/UhIwMAhZpCo.m3u8"}, "slug": "lifecycle-of-massive-stars", "video_id": "UhIwMAhZpCo", "youtube_id": "UhIwMAhZpCo", "readable_id": "lifecycle-of-massive-stars"}, "aJy5_p_LAhQ": {"duration": 267, "path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/bottom-up-versus-top-down-processing/", "keywords": "", "id": "aJy5_p_LAhQ", "title": "Bottom-up vs. top-down processing", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aJy5_p_LAhQ.mp4/aJy5_p_LAhQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aJy5_p_LAhQ.mp4/aJy5_p_LAhQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aJy5_p_LAhQ.m3u8/aJy5_p_LAhQ.m3u8"}, "slug": "bottom-up-versus-top-down-processing", "video_id": "aJy5_p_LAhQ", "youtube_id": "aJy5_p_LAhQ", "readable_id": "bottom-up-versus-top-down-processing"}, "NRS2ZJVVzOI": {"duration": 143, "path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/recog-triangles-example/", "keywords": "", "id": "NRS2ZJVVzOI", "title": "Categorizing triangles", "description": "Let's practice categorizing triangles in this example exercise.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NRS2ZJVVzOI.mp4/NRS2ZJVVzOI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NRS2ZJVVzOI.mp4/NRS2ZJVVzOI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NRS2ZJVVzOI.m3u8/NRS2ZJVVzOI.m3u8"}, "slug": "recog-triangles-example", "video_id": "NRS2ZJVVzOI", "youtube_id": "NRS2ZJVVzOI", "readable_id": "recog-triangles-example"}, "VsW6NXZIUCQ": {"duration": 663, "path": "khan/science/health-and-medicine/lab-values/tonicity-comparing-2-solutions/", "keywords": "", "id": "VsW6NXZIUCQ", "title": "Tonicity - comparing 2 solutions", "description": "Find out how tonicity is determined by ions that don't move across membranes and how it affects the movement of water. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VsW6NXZIUCQ.mp4/VsW6NXZIUCQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VsW6NXZIUCQ.mp4/VsW6NXZIUCQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VsW6NXZIUCQ.m3u8/VsW6NXZIUCQ.m3u8"}, "slug": "tonicity-comparing-2-solutions", "video_id": "VsW6NXZIUCQ", "youtube_id": "VsW6NXZIUCQ", "readable_id": "tonicity-comparing-2-solutions"}, "FfN8uQqLa_c": {"duration": 32, "path": "khan/science/discoveries-projects/robots/all-about-spout/spout_light_circuit/", "keywords": "", "id": "FfN8uQqLa_c", "title": "Spout lights", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FfN8uQqLa_c.mp4/FfN8uQqLa_c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FfN8uQqLa_c.mp4/FfN8uQqLa_c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FfN8uQqLa_c.m3u8/FfN8uQqLa_c.m3u8"}, "slug": "spout_light_circuit", "video_id": "FfN8uQqLa_c", "youtube_id": "FfN8uQqLa_c", "readable_id": "spout_light_circuit"}, "swFohliPgmQ": {"duration": 254, "path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/systems-of-nonlinear-equations-3/", "keywords": "", "id": "swFohliPgmQ", "title": "Systems of nonlinear equations 3", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/swFohliPgmQ.mp4/swFohliPgmQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/swFohliPgmQ.mp4/swFohliPgmQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/swFohliPgmQ.m3u8/swFohliPgmQ.m3u8"}, "slug": "systems-of-nonlinear-equations-3", "video_id": "swFohliPgmQ", "youtube_id": "swFohliPgmQ", "readable_id": "systems-of-nonlinear-equations-3"}, "ONBJo7dXJm8": {"duration": 772, "path": "khan/science/chemistry/chemical-equilibrium/equilibrium-constant/keq-intuition-mathy-and-not-necessary-to-progress/", "keywords": "chemistry", "id": "ONBJo7dXJm8", "title": "Keq intuition (mathy and not necessary to progress)", "description": "A probabilistic look at how molecules react to develop the intuition behind the equilibrium constant formula.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ONBJo7dXJm8.mp4/ONBJo7dXJm8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ONBJo7dXJm8.mp4/ONBJo7dXJm8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ONBJo7dXJm8.m3u8/ONBJo7dXJm8.m3u8"}, "slug": "keq-intuition-mathy-and-not-necessary-to-progress", "video_id": "ONBJo7dXJm8", "youtube_id": "ONBJo7dXJm8", "readable_id": "keq-intuition-mathy-and-not-necessary-to-progress"}, "RgklPQ8rbkg": {"duration": 168, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/binary-addition/", "keywords": "", "id": "RgklPQ8rbkg", "title": "Adding in binary", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RgklPQ8rbkg.mp4/RgklPQ8rbkg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RgklPQ8rbkg.mp4/RgklPQ8rbkg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RgklPQ8rbkg.m3u8/RgklPQ8rbkg.m3u8"}, "slug": "binary-addition", "video_id": "RgklPQ8rbkg", "youtube_id": "RgklPQ8rbkg", "readable_id": "binary-addition"}, "2ZgBJxT9pbU": {"duration": 703, "path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/impact-velocity-from-given-height/", "keywords": "projectile, motion", "id": "2ZgBJxT9pbU", "title": "Impact velocity from given height", "description": "Determining how fast something will be traveling upon impact when it is released from a given height", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2ZgBJxT9pbU.mp4/2ZgBJxT9pbU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2ZgBJxT9pbU.mp4/2ZgBJxT9pbU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2ZgBJxT9pbU.m3u8/2ZgBJxT9pbU.m3u8"}, "slug": "impact-velocity-from-given-height", "video_id": "2ZgBJxT9pbU", "youtube_id": "2ZgBJxT9pbU", "readable_id": "impact-velocity-from-given-height"}, "ZF_cZ-GX9PI": {"duration": 161, "path": "khan/math/algebra/linear_inequalities/compound_absolute_value_inequali/compound-inequalities-4/", "keywords": "u10_l3_t1_we4, Compound, Inequalities, CC_6_EE_8, CC_6_NS_6_c, CC_6_NS_7_a, CC_7_EE_4, CC_7_EE_4_b, CC_39336_A-CED_1, CC_39336_A-CED_3, CC_39336_A-REI_3", "id": "ZF_cZ-GX9PI", "title": "Compound inequalities 4", "description": "Compound Inequalities 4", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZF_cZ-GX9PI.mp4/ZF_cZ-GX9PI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZF_cZ-GX9PI.mp4/ZF_cZ-GX9PI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZF_cZ-GX9PI.m3u8/ZF_cZ-GX9PI.m3u8"}, "slug": "compound-inequalities-4", "video_id": "ZF_cZ-GX9PI", "youtube_id": "ZF_cZ-GX9PI", "readable_id": "compound-inequalities-4"}, "jiJdNWzETSk": {"duration": 543, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/naming-alkyl-halides/", "keywords": "Naming, Alkyl, Halides", "id": "jiJdNWzETSk", "title": "Naming alkyl halides", "description": "Naming Alkyl Halides", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jiJdNWzETSk.mp4/jiJdNWzETSk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jiJdNWzETSk.mp4/jiJdNWzETSk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jiJdNWzETSk.m3u8/jiJdNWzETSk.m3u8"}, "slug": "naming-alkyl-halides", "video_id": "jiJdNWzETSk", "youtube_id": "jiJdNWzETSk", "readable_id": "naming-alkyl-halides"}, "BJSk1joCQsM": {"duration": 653, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-area-circumference-volume/", "keywords": "geometry, area, circumference, volume", "id": "BJSk1joCQsM", "title": "CA Geometry: Area, circumference, volume", "description": "31-35, area, circumference and volume", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BJSk1joCQsM.mp4/BJSk1joCQsM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BJSk1joCQsM.mp4/BJSk1joCQsM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BJSk1joCQsM.m3u8/BJSk1joCQsM.m3u8"}, "slug": "ca-geometry-area-circumference-volume", "video_id": "BJSk1joCQsM", "youtube_id": "BJSk1joCQsM", "readable_id": "ca-geometry-area-circumference-volume"}, "HRuLhY0NAMI": {"duration": 135, "path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/dispersion/", "keywords": "MCAT", "id": "HRuLhY0NAMI", "title": "Dispersion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HRuLhY0NAMI.mp4/HRuLhY0NAMI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HRuLhY0NAMI.mp4/HRuLhY0NAMI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HRuLhY0NAMI.m3u8/HRuLhY0NAMI.m3u8"}, "slug": "dispersion", "video_id": "HRuLhY0NAMI", "youtube_id": "HRuLhY0NAMI", "readable_id": "dispersion"}, "EOiCa4i3oKo": {"duration": 31, "path": "khan/science/discoveries-projects/lego-robotics/lego-antbot/lego-antbot-build/", "keywords": "", "id": "EOiCa4i3oKo", "title": "Robot construction", "description": "Basic construction to get started", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EOiCa4i3oKo.mp4/EOiCa4i3oKo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EOiCa4i3oKo.mp4/EOiCa4i3oKo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EOiCa4i3oKo.m3u8/EOiCa4i3oKo.m3u8"}, "slug": "lego-antbot-build", "video_id": "EOiCa4i3oKo", "youtube_id": "EOiCa4i3oKo", "readable_id": "lego-antbot-build"}, "LG6H_8BU-f4": {"duration": 465, "path": "khan/test-prep/mcat/behavior/social-psychology/factors-that-influence-obedience-and-conformity/", "keywords": "", "id": "LG6H_8BU-f4", "title": "Factors that influence obedience and conformity", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LG6H_8BU-f4.mp4/LG6H_8BU-f4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LG6H_8BU-f4.mp4/LG6H_8BU-f4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LG6H_8BU-f4.m3u8/LG6H_8BU-f4.m3u8"}, "slug": "factors-that-influence-obedience-and-conformity", "video_id": "LG6H_8BU-f4", "youtube_id": "LG6H_8BU-f4", "readable_id": "factors-that-influence-obedience-and-conformity"}, "VBf3plXRonw": {"duration": 266, "path": "khan/test-prep/mcat/cells/prokaryotes-bacteria/bacterial-genetic-recombination/", "keywords": "", "id": "VBf3plXRonw", "title": "Bacterial genetic recombination", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VBf3plXRonw.mp4/VBf3plXRonw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VBf3plXRonw.mp4/VBf3plXRonw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VBf3plXRonw.m3u8/VBf3plXRonw.m3u8"}, "slug": "bacterial-genetic-recombination", "video_id": "VBf3plXRonw", "youtube_id": "VBf3plXRonw", "readable_id": "bacterial-genetic-recombination"}, "fW1u-OFbA1M": {"duration": 519, "path": "khan/math/algebra/quadratics/features-of-quadratic-functions/modeling-mosquitos-with-quadratics/", "keywords": "", "id": "fW1u-OFbA1M", "title": "Modeling mosquitos with quadratics", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fW1u-OFbA1M.mp4/fW1u-OFbA1M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fW1u-OFbA1M.mp4/fW1u-OFbA1M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fW1u-OFbA1M.m3u8/fW1u-OFbA1M.m3u8"}, "slug": "modeling-mosquitos-with-quadratics", "video_id": "fW1u-OFbA1M", "youtube_id": "fW1u-OFbA1M", "readable_id": "modeling-mosquitos-with-quadratics"}, "I9S5CvSqb5A": {"duration": 63, "path": "khan/math/early-math/cc-early-math-counting-topic/cc-early-math-count-object-topic/how-many-objects-1/", "keywords": "", "id": "I9S5CvSqb5A", "title": "Counting whales, sheep, and flowers", "description": "Learn how to count animals organized into rows and columns.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I9S5CvSqb5A.mp4/I9S5CvSqb5A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I9S5CvSqb5A.mp4/I9S5CvSqb5A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I9S5CvSqb5A.m3u8/I9S5CvSqb5A.m3u8"}, "slug": "how-many-objects-1", "video_id": "I9S5CvSqb5A", "youtube_id": "I9S5CvSqb5A", "readable_id": "how-many-objects-1"}, "6n0yxfWNFR4": {"duration": 304, "path": "khan/math/algebra/algebra-functions/functions-average-rate-of-change/average-rate-of-change-when-function-defined-by-equation/", "keywords": "", "id": "6n0yxfWNFR4", "title": "How to find the average rate of change from a formula (example)", "description": "Given the formula of a function, Sal finds the interval where the function has an average rate of change of 1/2.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6n0yxfWNFR4.mp4/6n0yxfWNFR4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6n0yxfWNFR4.mp4/6n0yxfWNFR4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6n0yxfWNFR4.m3u8/6n0yxfWNFR4.m3u8"}, "slug": "average-rate-of-change-when-function-defined-by-equation", "video_id": "6n0yxfWNFR4", "youtube_id": "6n0yxfWNFR4", "readable_id": "average-rate-of-change-when-function-defined-by-equation"}, "Oo2vGhVkvDo": {"duration": 262, "path": "khan/math/pre-algebra/negatives-absolute-value-pre-alg/add-subtract-negatives-pre-alg/negative-number-word-problems-1/", "keywords": "", "id": "Oo2vGhVkvDo", "title": "Negative number word problem", "description": "Use a number line to solve a word problem that includes a negative number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Oo2vGhVkvDo.mp4/Oo2vGhVkvDo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Oo2vGhVkvDo.mp4/Oo2vGhVkvDo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Oo2vGhVkvDo.m3u8/Oo2vGhVkvDo.m3u8"}, "slug": "negative-number-word-problems-1", "video_id": "Oo2vGhVkvDo", "youtube_id": "Oo2vGhVkvDo", "readable_id": "negative-number-word-problems-1"}, "6F32MMvcDNs": {"duration": 511, "path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/spout-tail/", "keywords": "", "id": "6F32MMvcDNs", "title": "Spout antennae and tail", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6F32MMvcDNs.mp4/6F32MMvcDNs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6F32MMvcDNs.mp4/6F32MMvcDNs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6F32MMvcDNs.m3u8/6F32MMvcDNs.m3u8"}, "slug": "spout-tail", "video_id": "6F32MMvcDNs", "youtube_id": "6F32MMvcDNs", "readable_id": "spout-tail"}, "CvO0a7suxmY": {"duration": 539, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-tertiary-syphilis/", "keywords": "", "id": "CvO0a7suxmY", "title": "What is tertiary syphilis?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CvO0a7suxmY.mp4/CvO0a7suxmY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CvO0a7suxmY.mp4/CvO0a7suxmY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CvO0a7suxmY.m3u8/CvO0a7suxmY.m3u8"}, "slug": "what-is-tertiary-syphilis", "video_id": "CvO0a7suxmY", "youtube_id": "CvO0a7suxmY", "readable_id": "what-is-tertiary-syphilis"}, "P4DiY4DvvmY": {"duration": 423, "path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/oxidation-of-alcohols-example/", "keywords": "", "id": "P4DiY4DvvmY", "title": "Oxidation of alcohols (examples)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P4DiY4DvvmY.mp4/P4DiY4DvvmY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P4DiY4DvvmY.mp4/P4DiY4DvvmY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P4DiY4DvvmY.m3u8/P4DiY4DvvmY.m3u8"}, "slug": "oxidation-of-alcohols-example", "video_id": "P4DiY4DvvmY", "youtube_id": "P4DiY4DvvmY", "readable_id": "oxidation-of-alcohols-example"}, "ELgQQjRhkic": {"duration": 502, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-history-passage/", "keywords": "", "id": "ELgQQjRhkic", "title": "Reading: History and social studies \u2014 How-to Part 1", "description": "Watch Sal work through Part 1 of an SAT Reading: History and social studies passage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ELgQQjRhkic.mp4/ELgQQjRhkic.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ELgQQjRhkic.mp4/ELgQQjRhkic.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ELgQQjRhkic.m3u8/ELgQQjRhkic.m3u8"}, "slug": "reading-history-passage", "video_id": "ELgQQjRhkic", "youtube_id": "ELgQQjRhkic", "readable_id": "reading-history-passage"}, "GzTr-OnMI-E": {"duration": 240, "path": "khan/humanities/global-culture/global-art-architecture/east-west-divan/", "keywords": "Tate", "id": "GzTr-OnMI-E", "title": "East-West Divan at the Venice Biennale", "description": "This video brought to you by\u00a0Tate.org.uk\n\nThe Venice Biennale art fair is home to a number of national exhibitions as well as smaller shows, often representing people and places that wouldn't normally get a look in. Former Tate curator Jemima Montagu presents an exhibition of work by artists from Iran, Afghanistan, and Pakistan. She talks about the thriving visual culture of the region and misconceptions surrounding it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GzTr-OnMI-E.mp4/GzTr-OnMI-E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GzTr-OnMI-E.mp4/GzTr-OnMI-E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GzTr-OnMI-E.m3u8/GzTr-OnMI-E.m3u8"}, "slug": "east-west-divan", "video_id": "GzTr-OnMI-E", "youtube_id": "GzTr-OnMI-E", "readable_id": "east-west-divan"}, "UV6mzD2Yc98": {"duration": 77, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-18-sound-of-sap/", "keywords": "", "id": "UV6mzD2Yc98", "title": "18 Sound of sap", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UV6mzD2Yc98.mp4/UV6mzD2Yc98.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UV6mzD2Yc98.mp4/UV6mzD2Yc98.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UV6mzD2Yc98.m3u8/UV6mzD2Yc98.m3u8"}, "slug": "sat-18-sound-of-sap", "video_id": "UV6mzD2Yc98", "youtube_id": "UV6mzD2Yc98", "readable_id": "sat-18-sound-of-sap"}, "XoEn1LfVoTo": {"duration": 521, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/equations_beginner/equations-2/", "keywords": "Equations, algebra, basic, CC_7_EE_1, CC_7_EE_4_a", "id": "XoEn1LfVoTo", "title": "Solving a more complicated equation", "description": "This example demonstrates how we solve an equation expressed such: ax + b = c. It's a little more complicated than previous examples, but you can do it!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XoEn1LfVoTo.mp4/XoEn1LfVoTo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XoEn1LfVoTo.mp4/XoEn1LfVoTo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XoEn1LfVoTo.m3u8/XoEn1LfVoTo.m3u8"}, "slug": "equations-2", "video_id": "XoEn1LfVoTo", "youtube_id": "XoEn1LfVoTo", "readable_id": "equations-2"}, "p0jCw2sqZgs": {"duration": 298, "path": "khan/math/on-sixth-grade-math/on-measurement/on-area/understanding-multiplication-through-area-models/", "keywords": "", "id": "p0jCw2sqZgs", "title": "Multiplying: understanding by using area models", "description": "If you're like us, you're a visual learner. Seeing a multiplication problem visualized using an area model really helps. Check it out!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p0jCw2sqZgs.mp4/p0jCw2sqZgs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p0jCw2sqZgs.mp4/p0jCw2sqZgs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p0jCw2sqZgs.m3u8/p0jCw2sqZgs.m3u8"}, "slug": "understanding-multiplication-through-area-models", "video_id": "p0jCw2sqZgs", "youtube_id": "p0jCw2sqZgs", "readable_id": "understanding-multiplication-through-area-models"}, "wQ34EIfd-5A": {"duration": 418, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-4-part-2/", "keywords": "2003, AIME, II, Problem, (part, 2), Three, Dimensional, Geometry", "id": "wQ34EIfd-5A", "title": "2003 AIME II problem 4 (part 2)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wQ34EIfd-5A.mp4/wQ34EIfd-5A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wQ34EIfd-5A.mp4/wQ34EIfd-5A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wQ34EIfd-5A.m3u8/wQ34EIfd-5A.m3u8"}, "slug": "2003-aime-ii-problem-4-part-2", "video_id": "wQ34EIfd-5A", "youtube_id": "wQ34EIfd-5A", "readable_id": "2003-aime-ii-problem-4-part-2"}, "ZfMl8oAL2Rs": {"duration": 52, "path": "khan/science/discoveries-projects/discoveries/electrostatics/foil-leaf-electroscope/", "keywords": "electroscope", "id": "ZfMl8oAL2Rs", "title": "Foil leaf electroscope", "description": "Foil Leaf Electroscope. Aluminum leaves repel in the presence of a charged object", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZfMl8oAL2Rs.mp4/ZfMl8oAL2Rs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZfMl8oAL2Rs.mp4/ZfMl8oAL2Rs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZfMl8oAL2Rs.m3u8/ZfMl8oAL2Rs.m3u8"}, "slug": "foil-leaf-electroscope", "video_id": "ZfMl8oAL2Rs", "youtube_id": "ZfMl8oAL2Rs", "readable_id": "foil-leaf-electroscope"}, "QA2TBiIsdT0": {"duration": 549, "path": "khan/economics-finance-domain/core-finance/housing/renting-v-buying/renting-vs-buying-a-home-part-2/", "keywords": "personal, finance, renting, buying, home, economics, interest, appreciation", "id": "QA2TBiIsdT0", "title": "Renting vs. buying a home (part 2)", "description": "Factoring in appreciation and depreciation into the rent vs. buy decision.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QA2TBiIsdT0.mp4/QA2TBiIsdT0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QA2TBiIsdT0.mp4/QA2TBiIsdT0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QA2TBiIsdT0.m3u8/QA2TBiIsdT0.m3u8"}, "slug": "renting-vs-buying-a-home-part-2", "video_id": "QA2TBiIsdT0", "youtube_id": "QA2TBiIsdT0", "readable_id": "renting-vs-buying-a-home-part-2"}, "7BkcNLOf56w": {"duration": 394, "path": "khan/math/precalculus/prob_comb/dependent_events_precalc/dependent-probability-example-2/", "keywords": "coin, unfair, CC_7_SP_5, CC_7_SP_6, CC_7_SP_7, CC_7_SP_7_b, CC_7_SP_8, CC_7_SP_8_a, CC_7_SP_8_b", "id": "7BkcNLOf56w", "title": "Dependent probability example 2", "description": "It's important to practice these probability problems as they get more complex eventually. Take a stab on this one...with our help, of course.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7BkcNLOf56w.mp4/7BkcNLOf56w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7BkcNLOf56w.mp4/7BkcNLOf56w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7BkcNLOf56w.m3u8/7BkcNLOf56w.m3u8"}, "slug": "dependent-probability-example-2", "video_id": "7BkcNLOf56w", "youtube_id": "7BkcNLOf56w", "readable_id": "dependent-probability-example-2"}, "qpbaglogObM": {"duration": 303, "path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-statistics/using-mean-to-find-missing-value/", "keywords": "", "id": "qpbaglogObM", "title": "How to find a missing value given the mean", "description": "Learn how to find the value of a missing piece of data if you know the mean of the data set.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qpbaglogObM.mp4/qpbaglogObM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qpbaglogObM.mp4/qpbaglogObM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qpbaglogObM.m3u8/qpbaglogObM.m3u8"}, "slug": "using-mean-to-find-missing-value", "video_id": "qpbaglogObM", "youtube_id": "qpbaglogObM", "readable_id": "using-mean-to-find-missing-value"}, "kO8-RPIkuLE": {"duration": 645, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/heart-attack-myocardial-infarct-diagnosis/", "keywords": "", "id": "kO8-RPIkuLE", "title": "Heart attack (myocardial infarct) diagnosis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kO8-RPIkuLE.mp4/kO8-RPIkuLE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kO8-RPIkuLE.mp4/kO8-RPIkuLE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kO8-RPIkuLE.m3u8/kO8-RPIkuLE.m3u8"}, "slug": "heart-attack-myocardial-infarct-diagnosis", "video_id": "kO8-RPIkuLE", "youtube_id": "kO8-RPIkuLE", "readable_id": "heart-attack-myocardial-infarct-diagnosis"}, "p_61XhXdlxI": {"duration": 112, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-monomials/multiplying-and-dividing-monomials-1/", "keywords": "U08_L1_T1_we1, Multiplying, and, Dividing, Monomials, CC_6_EE_1, CC_6_EE_2_c, CC_6_EE_7, CC_7_EE_4, CC_7_EE_4_a", "id": "p_61XhXdlxI", "title": "How to multiply monomials with two variables (example)", "description": "Sal expresses the area of a rectangle with length 4xy and width 2y as a monomial.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p_61XhXdlxI.mp4/p_61XhXdlxI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p_61XhXdlxI.mp4/p_61XhXdlxI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p_61XhXdlxI.m3u8/p_61XhXdlxI.m3u8"}, "slug": "multiplying-and-dividing-monomials-1", "video_id": "p_61XhXdlxI", "youtube_id": "p_61XhXdlxI", "readable_id": "multiplying-and-dividing-monomials-1"}, "BpBh8gvMifs": {"duration": 619, "path": "khan/math/algebra-basics/core-algebra-foundations/square-roots-for-college/square-roots-and-real-numbers/", "keywords": "Square, Roots, and, Real, Numbers, CC_8_EE_2", "id": "BpBh8gvMifs", "title": "Square roots and real numbers", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BpBh8gvMifs.mp4/BpBh8gvMifs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BpBh8gvMifs.mp4/BpBh8gvMifs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BpBh8gvMifs.m3u8/BpBh8gvMifs.m3u8"}, "slug": "square-roots-and-real-numbers", "video_id": "BpBh8gvMifs", "youtube_id": "BpBh8gvMifs", "readable_id": "square-roots-and-real-numbers"}, "RjzzgiUpaQY": {"duration": 834, "path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/extranuclear-inheritance-2/", "keywords": "", "id": "RjzzgiUpaQY", "title": "Extranuclear inheritance 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RjzzgiUpaQY.mp4/RjzzgiUpaQY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RjzzgiUpaQY.mp4/RjzzgiUpaQY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RjzzgiUpaQY.m3u8/RjzzgiUpaQY.m3u8"}, "slug": "extranuclear-inheritance-2", "video_id": "RjzzgiUpaQY", "youtube_id": "RjzzgiUpaQY", "readable_id": "extranuclear-inheritance-2"}, "m1ZTnl4CNQg": {"duration": 259, "path": "khan/math/geometry/basic-geometry/volume_tutorial/surface-area-from-net/", "keywords": "", "id": "m1ZTnl4CNQg", "title": "Finding surface area: nets of polyhedra", "description": "Sal solves a problem about whether or not a certain net could be folded up into a certain rectangular prism.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m1ZTnl4CNQg.mp4/m1ZTnl4CNQg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m1ZTnl4CNQg.mp4/m1ZTnl4CNQg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m1ZTnl4CNQg.m3u8/m1ZTnl4CNQg.m3u8"}, "slug": "surface-area-from-net", "video_id": "m1ZTnl4CNQg", "youtube_id": "m1ZTnl4CNQg", "readable_id": "surface-area-from-net"}, "VjmFKle7xIw": {"duration": 358, "path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law-of-sines/", "keywords": "", "id": "VjmFKle7xIw", "title": "Law of sines", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VjmFKle7xIw.mp4/VjmFKle7xIw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VjmFKle7xIw.mp4/VjmFKle7xIw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VjmFKle7xIw.m3u8/VjmFKle7xIw.m3u8"}, "slug": "law-of-sines", "video_id": "VjmFKle7xIw", "youtube_id": "VjmFKle7xIw", "readable_id": "law-of-sines"}, "ii1MBfj7-Sk": {"duration": 661, "path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/what-is-cerebral-palsy-and-what-causes-it/", "keywords": "Health (Industry),Cerebral Palsy (Disease Or Medical Condition),Medicine (Field Of Study)", "id": "ii1MBfj7-Sk", "title": "What is cerebral palsy and what causes it?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ii1MBfj7-Sk.mp4/ii1MBfj7-Sk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ii1MBfj7-Sk.mp4/ii1MBfj7-Sk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ii1MBfj7-Sk.m3u8/ii1MBfj7-Sk.m3u8"}, "slug": "what-is-cerebral-palsy-and-what-causes-it", "video_id": "ii1MBfj7-Sk", "youtube_id": "ii1MBfj7-Sk", "readable_id": "what-is-cerebral-palsy-and-what-causes-it"}, "QhiVnFvshZg": {"duration": 897, "path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/circulatory-system-and-the-heart/", "keywords": "heart, blood, vein, artery, pulmonary, atrium, ventricle", "id": "QhiVnFvshZg", "title": "Circulatory system and the heart", "description": "Introduction to the circulatory system and the heart", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QhiVnFvshZg.mp4/QhiVnFvshZg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QhiVnFvshZg.mp4/QhiVnFvshZg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QhiVnFvshZg.m3u8/QhiVnFvshZg.m3u8"}, "slug": "circulatory-system-and-the-heart", "video_id": "QhiVnFvshZg", "youtube_id": "QhiVnFvshZg", "readable_id": "circulatory-system-and-the-heart"}, "lnJRkY0mZh4": {"duration": 186, "path": "khan/humanities/monarchy-enlightenment/rococo/boucher-madame-de-pompadour-1750/", "keywords": "Smarthistory, Art, Art History, Fogg Art Museum, Boucher, Rococo, Louis XV", "id": "lnJRkY0mZh4", "title": "Boucher, Madame de Pompadour", "description": "Fran\u00e7ois Boucher, Madame de Pompadour, oil on canvas, 1750 (extention of canvas and additional painting likely added by Boucher later, Fogg Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lnJRkY0mZh4.mp4/lnJRkY0mZh4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lnJRkY0mZh4.mp4/lnJRkY0mZh4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lnJRkY0mZh4.m3u8/lnJRkY0mZh4.m3u8"}, "slug": "boucher-madame-de-pompadour-1750", "video_id": "lnJRkY0mZh4", "youtube_id": "lnJRkY0mZh4", "readable_id": "boucher-madame-de-pompadour-1750"}, "4Y2cY5YGxI4": {"duration": 539, "path": "khan/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula/molecular-mass-percentage/", "keywords": "", "id": "4Y2cY5YGxI4", "title": "Molecular mass percentage", "description": "Calculating the mass percentages of the elements C, H, and O in glucose after calculating the molecular mass of glucose.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4Y2cY5YGxI4.mp4/4Y2cY5YGxI4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4Y2cY5YGxI4.mp4/4Y2cY5YGxI4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4Y2cY5YGxI4.m3u8/4Y2cY5YGxI4.m3u8"}, "slug": "molecular-mass-percentage", "video_id": "4Y2cY5YGxI4", "youtube_id": "4Y2cY5YGxI4", "readable_id": "molecular-mass-percentage"}, "Vb_XE2mtE1Y": {"duration": 239, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s1-easier/", "keywords": "", "id": "Vb_XE2mtE1Y", "title": "Volume word problems \u2014 Basic example", "description": "Watch Sal work through a basic Volume word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Vb_XE2mtE1Y.mp4/Vb_XE2mtE1Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Vb_XE2mtE1Y.mp4/Vb_XE2mtE1Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Vb_XE2mtE1Y.m3u8/Vb_XE2mtE1Y.m3u8"}, "slug": "sat-math-s1-easier", "video_id": "Vb_XE2mtE1Y", "youtube_id": "Vb_XE2mtE1Y", "readable_id": "sat-math-s1-easier"}, "iUQR0enP7RQ": {"duration": 854, "path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverse-matrix-part-1/", "keywords": "matrix, inverse, identity, inverting, matrices", "id": "iUQR0enP7RQ", "title": "Idea behind inverting a 2x2 matrix", "description": "What the inverse of a matrix is. Examples of inverting a 2x2 matrix.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iUQR0enP7RQ.mp4/iUQR0enP7RQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iUQR0enP7RQ.mp4/iUQR0enP7RQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iUQR0enP7RQ.m3u8/iUQR0enP7RQ.m3u8"}, "slug": "inverse-matrix-part-1", "video_id": "iUQR0enP7RQ", "youtube_id": "iUQR0enP7RQ", "readable_id": "inverse-matrix-part-1"}, "GwycEivqYYI": {"duration": 220, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/multistep-word-problems-tut/multistep-word-problems-example-1/", "keywords": "", "id": "GwycEivqYYI", "title": "Multi-step word problem with decimals and subtraction", "description": "First visualize this word problem then use subtraction and multiplication of decimals and fractions to get at the answer.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GwycEivqYYI.mp4/GwycEivqYYI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GwycEivqYYI.mp4/GwycEivqYYI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GwycEivqYYI.m3u8/GwycEivqYYI.m3u8"}, "slug": "multistep-word-problems-example-1", "video_id": "GwycEivqYYI", "youtube_id": "GwycEivqYYI", "readable_id": "multistep-word-problems-example-1"}, "BSQr7Ii_vbY": {"duration": 216, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/morisot-the-mother-and-sister-of-the-artist-c-1869-1870/", "keywords": "Morisot, Impressionism, Berthe Morisot, Smarthistory, Art History, National Gallery", "id": "BSQr7Ii_vbY", "title": "Morisot, The Mother and Sister of the Artist", "description": "Berthe Morisot, The Mother and Sister of the Artist, c. 1869/1870, oil on canvas\n39 3/4 x 32 3/16 in. (101 x 81.8 cm), (National Gallery of Art)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker\n\nhttp://smarthistory.org/morisots-mother-and-sister-of-the-artist.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BSQr7Ii_vbY.mp4/BSQr7Ii_vbY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BSQr7Ii_vbY.mp4/BSQr7Ii_vbY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BSQr7Ii_vbY.m3u8/BSQr7Ii_vbY.m3u8"}, "slug": "morisot-the-mother-and-sister-of-the-artist-c-1869-1870", "video_id": "BSQr7Ii_vbY", "youtube_id": "BSQr7Ii_vbY", "readable_id": "morisot-the-mother-and-sister-of-the-artist-c-1869-1870"}, "D-EIh7NJvtQ": {"duration": 457, "path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/angle-measurement-and-circle-arcs/", "keywords": "", "id": "D-EIh7NJvtQ", "title": "Angle measurement and circle arcs", "description": "Did you know that the measurement of an angle is realted to the arc of a circle? Yes, indeed! Watch.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D-EIh7NJvtQ.mp4/D-EIh7NJvtQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D-EIh7NJvtQ.mp4/D-EIh7NJvtQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D-EIh7NJvtQ.m3u8/D-EIh7NJvtQ.m3u8"}, "slug": "angle-measurement-and-circle-arcs", "video_id": "D-EIh7NJvtQ", "youtube_id": "D-EIh7NJvtQ", "readable_id": "angle-measurement-and-circle-arcs"}, "QX2YLR09Q78": {"duration": 609, "path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-9/", "keywords": "Bernoulli's, equation, fluid, motion, physics", "id": "QX2YLR09Q78", "title": "Bernoulli's equation (part 2)", "description": "This is the second of two videos where Sal derives Bernoulli's equation. In the second half of the video Sal also begins an example problem where liquid exits a hole in a container.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QX2YLR09Q78.mp4/QX2YLR09Q78.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QX2YLR09Q78.mp4/QX2YLR09Q78.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QX2YLR09Q78.m3u8/QX2YLR09Q78.m3u8"}, "slug": "fluids-part-9", "video_id": "QX2YLR09Q78", "youtube_id": "QX2YLR09Q78", "readable_id": "fluids-part-9"}, "TzSMvEiEuo0": {"duration": 149, "path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/room-1940/", "keywords": "Tate", "id": "TzSMvEiEuo0", "title": "Room: 1940s", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Chris Stephens explores the 1940s.\n\nLearn more about the art featured in this video:\n-\u00a0Francis Bacon, Three Studies for Figures at the Base of a Crucifixion,\u00a01944\n-\u00a0Sir Jacob Epstein, Jacob and the Angel.\u00a01940\u20131", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TzSMvEiEuo0.mp4/TzSMvEiEuo0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TzSMvEiEuo0.mp4/TzSMvEiEuo0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TzSMvEiEuo0.m3u8/TzSMvEiEuo0.m3u8"}, "slug": "room-1940", "video_id": "TzSMvEiEuo0", "youtube_id": "TzSMvEiEuo0", "readable_id": "room-1940"}, "DiBXxWBrV24": {"duration": 410, "path": "khan/science/physics/work-and-energy/mechanical-advantage/mechanical-advantage-part-2/", "keywords": "mechanical, advantage, moment, level, physics, work", "id": "DiBXxWBrV24", "title": "Mechanical advantage (part 2)", "description": "More on mechanical advantage, levers and moments.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DiBXxWBrV24.mp4/DiBXxWBrV24.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DiBXxWBrV24.mp4/DiBXxWBrV24.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DiBXxWBrV24.m3u8/DiBXxWBrV24.m3u8"}, "slug": "mechanical-advantage-part-2", "video_id": "DiBXxWBrV24", "youtube_id": "DiBXxWBrV24", "readable_id": "mechanical-advantage-part-2"}, "yBrp8uvNAhI": {"duration": 818, "path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/orbitals/", "keywords": "chemistry, atomic, orbitals", "id": "yBrp8uvNAhI", "title": "Orbitals", "description": "An introduction to orbitals", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yBrp8uvNAhI.mp4/yBrp8uvNAhI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yBrp8uvNAhI.mp4/yBrp8uvNAhI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yBrp8uvNAhI.m3u8/yBrp8uvNAhI.m3u8"}, "slug": "orbitals", "video_id": "yBrp8uvNAhI", "youtube_id": "yBrp8uvNAhI", "readable_id": "orbitals"}, "mkyPZjkdU2Q": {"duration": 346, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/roc-and-economic-growth/", "keywords": "", "id": "mkyPZjkdU2Q", "title": "Critically looking at data on ROC and economic growth over millenia", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mkyPZjkdU2Q.mp4/mkyPZjkdU2Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mkyPZjkdU2Q.mp4/mkyPZjkdU2Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mkyPZjkdU2Q.m3u8/mkyPZjkdU2Q.m3u8"}, "slug": "roc-and-economic-growth", "video_id": "mkyPZjkdU2Q", "youtube_id": "mkyPZjkdU2Q", "readable_id": "roc-and-economic-growth"}, "L8NrBjd1aNo": {"duration": 136, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-batteries/", "keywords": "Batteries, Bit-zee, robot power", "id": "L8NrBjd1aNo", "title": "Batteries/power", "description": "In this video we install 8 AA batteries in Bit-zee's frame using zip ties.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L8NrBjd1aNo.mp4/L8NrBjd1aNo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L8NrBjd1aNo.mp4/L8NrBjd1aNo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L8NrBjd1aNo.m3u8/L8NrBjd1aNo.m3u8"}, "slug": "bit-zee-s-batteries", "video_id": "L8NrBjd1aNo", "youtube_id": "L8NrBjd1aNo", "readable_id": "bit-zee-s-batteries"}, "fY0jAVfmcqM": {"duration": 170, "path": "khan/partner-content/big-history-project/solar-system-and-earth/earth-and-form-solar-system/bhp-threshold4/", "keywords": "", "id": "fY0jAVfmcqM", "title": "Threshold 4: Earth & Solar System", "description": "Clouds of diverse, chemical matter spun around our Sun, coming together to form our Earth and Solar System.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fY0jAVfmcqM.mp4/fY0jAVfmcqM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fY0jAVfmcqM.mp4/fY0jAVfmcqM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fY0jAVfmcqM.m3u8/fY0jAVfmcqM.m3u8"}, "slug": "bhp-threshold4", "video_id": "fY0jAVfmcqM", "youtube_id": "fY0jAVfmcqM", "readable_id": "bhp-threshold4"}, "fuwUltMAdYQ": {"duration": 75, "path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/overview-parabolic-arcs/", "keywords": "", "id": "fuwUltMAdYQ", "title": "Introduction to parabolic arcs", "description": "What do parabolic arcs have to do with blades of grass?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fuwUltMAdYQ.mp4/fuwUltMAdYQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fuwUltMAdYQ.mp4/fuwUltMAdYQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fuwUltMAdYQ.m3u8/fuwUltMAdYQ.m3u8"}, "slug": "overview-parabolic-arcs", "video_id": "fuwUltMAdYQ", "youtube_id": "fuwUltMAdYQ", "readable_id": "overview-parabolic-arcs"}, "wYAhlTHIBT4": {"duration": 534, "path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/housing-price-conundrum-part-2/", "keywords": "economics, housing, prices, bubble, lending", "id": "wYAhlTHIBT4", "title": "Housing price conundrum (part 2)", "description": "How lower lending standards led to housing price inflation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wYAhlTHIBT4.mp4/wYAhlTHIBT4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wYAhlTHIBT4.mp4/wYAhlTHIBT4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wYAhlTHIBT4.m3u8/wYAhlTHIBT4.m3u8"}, "slug": "housing-price-conundrum-part-2", "video_id": "wYAhlTHIBT4", "youtube_id": "wYAhlTHIBT4", "readable_id": "housing-price-conundrum-part-2"}, "YUEkOBvJSNg": {"duration": 749, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/chair-and-boat-shapes-for-cyclohexane/", "keywords": "Chair, and, Boat, Shapes, for, Cyclohexane", "id": "YUEkOBvJSNg", "title": "Chair and boat shapes for cyclohexane", "description": "Chair and Boat Shapes for Cyclohexane", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YUEkOBvJSNg.mp4/YUEkOBvJSNg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YUEkOBvJSNg.mp4/YUEkOBvJSNg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YUEkOBvJSNg.m3u8/YUEkOBvJSNg.m3u8"}, "slug": "chair-and-boat-shapes-for-cyclohexane", "video_id": "YUEkOBvJSNg", "youtube_id": "YUEkOBvJSNg", "readable_id": "chair-and-boat-shapes-for-cyclohexane"}, "QV0jsTiobU4": {"duration": 553, "path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-simpler-4x4-determinant/", "keywords": "linear, algebra, determinant", "id": "QV0jsTiobU4", "title": "Simpler 4x4 determinant", "description": "Calculating a 4x4 determinant by putting in in upper triangular form first.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QV0jsTiobU4.mp4/QV0jsTiobU4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QV0jsTiobU4.mp4/QV0jsTiobU4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QV0jsTiobU4.m3u8/QV0jsTiobU4.m3u8"}, "slug": "linear-algebra-simpler-4x4-determinant", "video_id": "QV0jsTiobU4", "youtube_id": "QV0jsTiobU4", "readable_id": "linear-algebra-simpler-4x4-determinant"}, "YOlP6xmw7zU": {"duration": 688, "path": "khan/test-prep/gmat/problem-solving/gmat-math-11/", "keywords": "gmat, math, problem, solving", "id": "YOlP6xmw7zU", "title": "GMAT: Math 11", "description": "61-64, pg. 160", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YOlP6xmw7zU.mp4/YOlP6xmw7zU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YOlP6xmw7zU.mp4/YOlP6xmw7zU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YOlP6xmw7zU.m3u8/YOlP6xmw7zU.m3u8"}, "slug": "gmat-math-11", "video_id": "YOlP6xmw7zU", "youtube_id": "YOlP6xmw7zU", "readable_id": "gmat-math-11"}, "ixf33dQDlXc": {"duration": 254, "path": "khan/partner-content/cas-biodiversity/biodiversity-levels/genetic/ecosystem-biodiversity/", "keywords": "", "id": "ixf33dQDlXc", "title": "Ecosystem biodiversity", "description": "Are all coral reefs the same?\u00a0 Each regional ecosystem has its own\u00a0assemblage of species and each contributes uniquely to global\u00a0biodiversity. Explore why ecosystem diversity is important for\u00a0conservation decisions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ixf33dQDlXc.mp4/ixf33dQDlXc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ixf33dQDlXc.mp4/ixf33dQDlXc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ixf33dQDlXc.m3u8/ixf33dQDlXc.m3u8"}, "slug": "ecosystem-biodiversity", "video_id": "ixf33dQDlXc", "youtube_id": "ixf33dQDlXc", "readable_id": "ecosystem-biodiversity"}, "VTcPBF9dtKc": {"duration": 241, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h2-easier/", "keywords": "", "id": "VTcPBF9dtKc", "title": "Linear inequality word problems \u2014 Basic example", "description": "Watch Sal work through a basic Linear inequality word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VTcPBF9dtKc.mp4/VTcPBF9dtKc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VTcPBF9dtKc.mp4/VTcPBF9dtKc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VTcPBF9dtKc.m3u8/VTcPBF9dtKc.m3u8"}, "slug": "sat-math-h2-easier", "video_id": "VTcPBF9dtKc", "youtube_id": "VTcPBF9dtKc", "readable_id": "sat-math-h2-easier"}, "U7fKAYqfpC8": {"duration": 264, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/pulmonary-hypertension-diagnosis/", "keywords": "", "id": "U7fKAYqfpC8", "title": "Pulmonary hypertension diagnosis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U7fKAYqfpC8.mp4/U7fKAYqfpC8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U7fKAYqfpC8.mp4/U7fKAYqfpC8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U7fKAYqfpC8.m3u8/U7fKAYqfpC8.m3u8"}, "slug": "pulmonary-hypertension-diagnosis", "video_id": "U7fKAYqfpC8", "youtube_id": "U7fKAYqfpC8", "readable_id": "pulmonary-hypertension-diagnosis"}, "p5L8JFxKrRM": {"duration": 281, "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments/sscc-blended-flexsummit/", "keywords": "", "id": "p5L8JFxKrRM", "title": "Redesigning the school day at Summit Public Schools using a flex model", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p5L8JFxKrRM.mp4/p5L8JFxKrRM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p5L8JFxKrRM.mp4/p5L8JFxKrRM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p5L8JFxKrRM.m3u8/p5L8JFxKrRM.m3u8"}, "slug": "sscc-blended-flexsummit", "video_id": "p5L8JFxKrRM", "youtube_id": "p5L8JFxKrRM", "readable_id": "sscc-blended-flexsummit"}, "9vI1kP-9zpw": {"duration": 247, "path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/henri-matisse-the-piano-lesson-1916/", "keywords": "matisse, piano lesson, Smarthistory, Khan Academy, Henri Matisse", "id": "9vI1kP-9zpw", "title": "Matisse, Piano Lesson", "description": "Henri Matisse, The Piano Lesson, 1916 (The Museum of Modern Art) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9vI1kP-9zpw.mp4/9vI1kP-9zpw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9vI1kP-9zpw.mp4/9vI1kP-9zpw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9vI1kP-9zpw.m3u8/9vI1kP-9zpw.m3u8"}, "slug": "henri-matisse-the-piano-lesson-1916", "video_id": "9vI1kP-9zpw", "youtube_id": "9vI1kP-9zpw", "readable_id": "henri-matisse-the-piano-lesson-1916"}, "D6mivA_8L8U": {"duration": 154, "path": "khan/math/algebra2/arithmetic-with-polynomials/multiplying-polynomials-review/more-multiplying-polynomials/", "keywords": "u11_l3_t2_we3, More, multiplying, polynomials, CC_39336_A-APR_1", "id": "D6mivA_8L8U", "title": "How to multiply a binomial by a polynomial (example)", "description": "Sal multiplies (10a-3) by (5a^2 + 7a - 1).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D6mivA_8L8U.mp4/D6mivA_8L8U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D6mivA_8L8U.mp4/D6mivA_8L8U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D6mivA_8L8U.m3u8/D6mivA_8L8U.m3u8"}, "slug": "more-multiplying-polynomials", "video_id": "D6mivA_8L8U", "youtube_id": "D6mivA_8L8U", "readable_id": "more-multiplying-polynomials"}, "i-sAB-Z2_bE": {"duration": 121, "path": "khan/math/pre-algebra/fractions-pre-alg/visualizing-equiv-fracs-pre-alg/equivalent-fraction-word-problem-example-2/", "keywords": "", "id": "i-sAB-Z2_bE", "title": "Equivalent fraction word problem example 2", "description": "How do you find an equivalent fraction? If you know the denominator of both fractions, and the numerator of one of them...you can figure out the rest We'll show you in this word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i-sAB-Z2_bE.mp4/i-sAB-Z2_bE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i-sAB-Z2_bE.mp4/i-sAB-Z2_bE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i-sAB-Z2_bE.m3u8/i-sAB-Z2_bE.m3u8"}, "slug": "equivalent-fraction-word-problem-example-2", "video_id": "i-sAB-Z2_bE", "youtube_id": "i-sAB-Z2_bE", "readable_id": "equivalent-fraction-word-problem-example-2"}, "OFXY9-pec1I": {"duration": 236, "path": "khan/computing/computer-science/informationtheory/info-theory/rosetta-stone-196-b-c-e/", "keywords": "rosetta stone, egypt, napoleon, smarthistory, art history, hieroglyphics, translation", "id": "OFXY9-pec1I", "title": "Ptolemaic: Rosetta Stone", "description": "Rosetta Stone, 196 B.C.E., granite, 114.4 cm x 72.3 x 27.9 cm or 45 x 28.5 x 11 inches, Ptolemaic Period (British Museum, London). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OFXY9-pec1I.mp4/OFXY9-pec1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OFXY9-pec1I.mp4/OFXY9-pec1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OFXY9-pec1I.m3u8/OFXY9-pec1I.m3u8"}, "slug": "rosetta-stone-196-b-c-e", "video_id": "OFXY9-pec1I", "youtube_id": "OFXY9-pec1I", "readable_id": "rosetta-stone-196-b-c-e"}, "9ZnvDzfMRps": {"duration": 154, "path": "khan/college-admissions/explore-college-options/introduction-eco/overview-exploring-college-options/", "keywords": "", "id": "9ZnvDzfMRps", "title": "Overview: Exploring college options", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9ZnvDzfMRps.mp4/9ZnvDzfMRps.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9ZnvDzfMRps.mp4/9ZnvDzfMRps.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9ZnvDzfMRps.m3u8/9ZnvDzfMRps.m3u8"}, "slug": "overview-exploring-college-options", "video_id": "9ZnvDzfMRps", "youtube_id": "9ZnvDzfMRps", "readable_id": "overview-exploring-college-options"}, "9ASWQi14FlE": {"duration": 621, "path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/recognizing-points-on-a-circle/", "keywords": "", "id": "9ASWQi14FlE", "title": "Recognizing points on a circle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9ASWQi14FlE.mp4/9ASWQi14FlE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9ASWQi14FlE.mp4/9ASWQi14FlE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9ASWQi14FlE.m3u8/9ASWQi14FlE.m3u8"}, "slug": "recognizing-points-on-a-circle", "video_id": "9ASWQi14FlE", "youtube_id": "9ASWQi14FlE", "readable_id": "recognizing-points-on-a-circle"}, "eLyLbaXfJXo": {"duration": 389, "path": "khan/math/probability/descriptive-statistics/central_tendency/comparing-means-and-medians/", "keywords": "", "id": "eLyLbaXfJXo", "title": "Means and medians of different distributions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eLyLbaXfJXo.mp4/eLyLbaXfJXo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eLyLbaXfJXo.mp4/eLyLbaXfJXo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eLyLbaXfJXo.m3u8/eLyLbaXfJXo.m3u8"}, "slug": "comparing-means-and-medians", "video_id": "eLyLbaXfJXo", "youtube_id": "eLyLbaXfJXo", "readable_id": "comparing-means-and-medians"}, "F5RyVWI4Onk": {"duration": 157, "path": "khan/math/recreational-math/vi-hart/thanksgiving-math/optimal-potatoes/", "keywords": "", "id": "F5RyVWI4Onk", "title": "Optimal potatoes", "description": "With Thanksgiving just around the corner here in the US, it is important to know how to arrange mathed potatoes on your plate for maximum gravy. Also shown are bread spheres, butter prism, and gelatinous cranberry cylinder. \n\nGreen Bean Matherole: http://youtu.be/XwIs1nlDQ2I\nBorromean Onion Rings: http://youtu.be/4tsjCND2ZfM\nTurduckenen-duckenen: http://youtu.be/pjrI91J6jOw", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F5RyVWI4Onk.mp4/F5RyVWI4Onk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F5RyVWI4Onk.mp4/F5RyVWI4Onk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F5RyVWI4Onk.m3u8/F5RyVWI4Onk.m3u8"}, "slug": "optimal-potatoes", "video_id": "F5RyVWI4Onk", "youtube_id": "F5RyVWI4Onk", "readable_id": "optimal-potatoes"}, "3ckdqEsQJaw": {"duration": 178, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/jason-christiansen/jason-christiansen-3/", "keywords": "", "id": "3ckdqEsQJaw", "title": "Turning a Hobby into a Bright Business", "description": "Jason Christiansen has heard all the familiar comparisons between running a business and being a team player, but as a former major league baseball player, he steps to the plate with a unique perspective. Christiansen talks about building Rigid Industries and how the company deals with imitation product lines and compares the pressure of standing on the mound to standing before his team of employees.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3ckdqEsQJaw.mp4/3ckdqEsQJaw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3ckdqEsQJaw.mp4/3ckdqEsQJaw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3ckdqEsQJaw.m3u8/3ckdqEsQJaw.m3u8"}, "slug": "jason-christiansen-3", "video_id": "3ckdqEsQJaw", "youtube_id": "3ckdqEsQJaw", "readable_id": "jason-christiansen-3"}, "K8wwaXkT29Y": {"duration": 77, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-11/", "keywords": "", "id": "K8wwaXkT29Y", "title": "11 Solving for parabola constant", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K8wwaXkT29Y.mp4/K8wwaXkT29Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K8wwaXkT29Y.mp4/K8wwaXkT29Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K8wwaXkT29Y.m3u8/K8wwaXkT29Y.m3u8"}, "slug": "sat-2009-may-3-11", "video_id": "K8wwaXkT29Y", "youtube_id": "K8wwaXkT29Y", "readable_id": "sat-2009-may-3-11"}, "cLP7INqs3JM": {"duration": 355, "path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/introduction-to-rational-and-irrational-numbers/", "keywords": "", "id": "cLP7INqs3JM", "title": "Introduction to rational and irrational numbers", "description": "Learn what rational and irrational numbers are and how to tell them apart.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cLP7INqs3JM.mp4/cLP7INqs3JM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cLP7INqs3JM.mp4/cLP7INqs3JM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cLP7INqs3JM.m3u8/cLP7INqs3JM.m3u8"}, "slug": "introduction-to-rational-and-irrational-numbers", "video_id": "cLP7INqs3JM", "youtube_id": "cLP7INqs3JM", "readable_id": "introduction-to-rational-and-irrational-numbers"}, "BwPjtAe1gvE": {"duration": 529, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/polysubstituted-cyclohexane/", "keywords": "", "id": "BwPjtAe1gvE", "title": "Polysubstituted cyclohexane", "description": "How to draw the chair conformations for menthol", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BwPjtAe1gvE.mp4/BwPjtAe1gvE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BwPjtAe1gvE.mp4/BwPjtAe1gvE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BwPjtAe1gvE.m3u8/BwPjtAe1gvE.m3u8"}, "slug": "polysubstituted-cyclohexane", "video_id": "BwPjtAe1gvE", "youtube_id": "BwPjtAe1gvE", "readable_id": "polysubstituted-cyclohexane"}, "jCByVqB4iJQ": {"duration": 158, "path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/matisse-blue-window/", "keywords": "", "id": "jCByVqB4iJQ", "title": "Matisse, \"The Blue Window\"", "description": "Learn about Matisse\u2019s search for essential form in The Blue Window.\u00a0To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jCByVqB4iJQ.mp4/jCByVqB4iJQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jCByVqB4iJQ.mp4/jCByVqB4iJQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jCByVqB4iJQ.m3u8/jCByVqB4iJQ.m3u8"}, "slug": "matisse-blue-window", "video_id": "jCByVqB4iJQ", "youtube_id": "jCByVqB4iJQ", "readable_id": "matisse-blue-window"}, "dD71fFNwVJw": {"duration": 267, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/algebra-foundations-computing-scientific-notation/scientific-notation-3-new/", "keywords": "u11_l1_t4_we3, Scientific, Notation, CC_5_NBT_2, CC_8_EE_3, CC_8_EE_4", "id": "dD71fFNwVJw", "title": "Speed of light and distance from sun (scientific notation word problem)", "description": "Amazingly, we can figure out how far the sun is from the earth if we know how to multiply numbers in scientific notation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dD71fFNwVJw.mp4/dD71fFNwVJw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dD71fFNwVJw.mp4/dD71fFNwVJw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dD71fFNwVJw.m3u8/dD71fFNwVJw.m3u8"}, "slug": "scientific-notation-3-new", "video_id": "dD71fFNwVJw", "youtube_id": "dD71fFNwVJw", "readable_id": "scientific-notation-3-new"}, "GluohfOedQE": {"duration": 617, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-deductive-reasoning/", "keywords": "geometry, congruent, deductive, reasoning", "id": "GluohfOedQE", "title": "CA Geometry: Deductive reasoning", "description": "1-3, deductive reasoning and congruent angles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GluohfOedQE.mp4/GluohfOedQE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GluohfOedQE.mp4/GluohfOedQE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GluohfOedQE.m3u8/GluohfOedQE.m3u8"}, "slug": "ca-geometry-deductive-reasoning", "video_id": "GluohfOedQE", "youtube_id": "GluohfOedQE", "readable_id": "ca-geometry-deductive-reasoning"}, "Fdu5-aNJTzU": {"duration": 656, "path": "khan/math/differential-calculus/limits_topic/epsilon_delta/epsilon-delta-limit-definition-2/", "keywords": "epsilon, delta, limit, definition, CC_39336_A-CED_2, CC_39336_A-CED_3, CC_39336_A-CED_4", "id": "Fdu5-aNJTzU", "title": "Epsilon-delta limit definition 2", "description": "Using the epsilon delta definition to prove a limit", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Fdu5-aNJTzU.mp4/Fdu5-aNJTzU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Fdu5-aNJTzU.mp4/Fdu5-aNJTzU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Fdu5-aNJTzU.m3u8/Fdu5-aNJTzU.m3u8"}, "slug": "epsilon-delta-limit-definition-2", "video_id": "Fdu5-aNJTzU", "youtube_id": "Fdu5-aNJTzU", "readable_id": "epsilon-delta-limit-definition-2"}, "Z9KoBRGc3_s": {"duration": 301, "path": "khan/humanities/art-asia/southeast-asia/bali/balinese-shadow-theater/", "keywords": "", "id": "Z9KoBRGc3_s", "title": "Balinese shadow theater", "description": "Watch an excerpt from the Hindu epic, the\u00a0Mahabharata. Performed Shadowmaster I Wayan Nartha.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z9KoBRGc3_s.mp4/Z9KoBRGc3_s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z9KoBRGc3_s.mp4/Z9KoBRGc3_s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z9KoBRGc3_s.m3u8/Z9KoBRGc3_s.m3u8"}, "slug": "balinese-shadow-theater", "video_id": "Z9KoBRGc3_s", "youtube_id": "Z9KoBRGc3_s", "readable_id": "balinese-shadow-theater"}, "tkJZCP-FMPE": {"duration": 90, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-9-7/", "keywords": "", "id": "tkJZCP-FMPE", "title": "7 Circumference of circle", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tkJZCP-FMPE.mp4/tkJZCP-FMPE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tkJZCP-FMPE.mp4/tkJZCP-FMPE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tkJZCP-FMPE.m3u8/tkJZCP-FMPE.m3u8"}, "slug": "sat-2010-may-9-7", "video_id": "tkJZCP-FMPE", "youtube_id": "tkJZCP-FMPE", "readable_id": "sat-2010-may-9-7"}, "UjX4ExCixWY": {"duration": 267, "path": "khan/humanities/medieval-world/early-christian1/sarcophagus-of-junius-bassus-marble-359-c-e/", "keywords": "Sarcophagus, Basilica of St. Peters, Early Christian Art, Smarthistory, Art History", "id": "UjX4ExCixWY", "title": "Sarcophagus of Junius Bassus", "description": "Sarcophagus of Junius Bassus, marble, 359 C.E. (Treasury of Saint Peter's Basilica)\n\nPlease note that due to photography restrictions, the images used in the video above\nshow the plaster cast on display in the Vatican Museum. Nevertheless, the audio conversation\nwas recorded in the treasury in Saint Peter's Basilica, in front of the original sarcophagus.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker \n\nhttp://www.smarthistory.org/sarcophagus-of-junius-bassus.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UjX4ExCixWY.mp4/UjX4ExCixWY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UjX4ExCixWY.mp4/UjX4ExCixWY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UjX4ExCixWY.m3u8/UjX4ExCixWY.m3u8"}, "slug": "sarcophagus-of-junius-bassus-marble-359-c-e", "video_id": "UjX4ExCixWY", "youtube_id": "UjX4ExCixWY", "readable_id": "sarcophagus-of-junius-bassus-marble-359-c-e"}, "1FQPXtN7MeI": {"duration": 672, "path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/uv-vis-spectroscopy/", "keywords": "", "id": "1FQPXtN7MeI", "title": "UV-Vis spectroscopy", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1FQPXtN7MeI.mp4/1FQPXtN7MeI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1FQPXtN7MeI.mp4/1FQPXtN7MeI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1FQPXtN7MeI.m3u8/1FQPXtN7MeI.m3u8"}, "slug": "uv-vis-spectroscopy", "video_id": "1FQPXtN7MeI", "youtube_id": "1FQPXtN7MeI", "readable_id": "uv-vis-spectroscopy"}, "F_BI7rBhfos": {"duration": 136, "path": "khan/partner-content/big-history-project/what-is-big-history/my-big-history/introduction-to-thresholds-of-increasing-complexity/", "keywords": "", "id": "F_BI7rBhfos", "title": "Introduction to Thresholds of Increasing Complexity", "description": "Eight dramatic transitions drive Big History's 13.8 billion year story.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F_BI7rBhfos.mp4/F_BI7rBhfos.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F_BI7rBhfos.mp4/F_BI7rBhfos.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F_BI7rBhfos.m3u8/F_BI7rBhfos.m3u8"}, "slug": "introduction-to-thresholds-of-increasing-complexity", "video_id": "F_BI7rBhfos", "youtube_id": "F_BI7rBhfos", "readable_id": "introduction-to-thresholds-of-increasing-complexity"}, "U5xnGyw2llY": {"duration": 675, "path": "khan/test-prep/mcat/chemical-processes/carbohydrates-5d/carbohydrates-absolute-configuration-epimers-common-names/", "keywords": "", "id": "U5xnGyw2llY", "title": "Carbohydrates - absolute configuration, epimers, common names", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U5xnGyw2llY.mp4/U5xnGyw2llY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U5xnGyw2llY.mp4/U5xnGyw2llY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U5xnGyw2llY.m3u8/U5xnGyw2llY.m3u8"}, "slug": "carbohydrates-absolute-configuration-epimers-common-names", "video_id": "U5xnGyw2llY", "youtube_id": "U5xnGyw2llY", "readable_id": "carbohydrates-absolute-configuration-epimers-common-names"}, "p9B4s0N5yk8": {"duration": 644, "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/chemical-equivalence/", "keywords": "", "id": "p9B4s0N5yk8", "title": "Chemical equivalence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p9B4s0N5yk8.mp4/p9B4s0N5yk8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p9B4s0N5yk8.mp4/p9B4s0N5yk8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p9B4s0N5yk8.m3u8/p9B4s0N5yk8.m3u8"}, "slug": "chemical-equivalence", "video_id": "p9B4s0N5yk8", "youtube_id": "p9B4s0N5yk8", "readable_id": "chemical-equivalence"}, "09Cx7xuIXig": {"duration": 498, "path": "khan/math/probability/descriptive-statistics/box-and-whisker-plots/constructing-a-box-and-whisker-plot/", "keywords": "box, whisker, plot", "id": "09Cx7xuIXig", "title": "Constructing a box and whisker plot", "description": "Here's a word problem that's perfectly suited for a box and whiskers plot to help analyze data. Let's construct one together, shall we?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/09Cx7xuIXig.mp4/09Cx7xuIXig.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/09Cx7xuIXig.mp4/09Cx7xuIXig.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/09Cx7xuIXig.m3u8/09Cx7xuIXig.m3u8"}, "slug": "constructing-a-box-and-whisker-plot", "video_id": "09Cx7xuIXig", "youtube_id": "09Cx7xuIXig", "readable_id": "constructing-a-box-and-whisker-plot"}, "x-GV2v0dRNE": {"duration": 850, "path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/linear-algebra-determinant-of-transpose/", "keywords": "transpose, determinant, linear, algebra, matrix", "id": "x-GV2v0dRNE", "title": "Determinant of transpose", "description": "Proof by induction that transposing a matrix does not change its determinant", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x-GV2v0dRNE.mp4/x-GV2v0dRNE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x-GV2v0dRNE.mp4/x-GV2v0dRNE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x-GV2v0dRNE.m3u8/x-GV2v0dRNE.m3u8"}, "slug": "linear-algebra-determinant-of-transpose", "video_id": "x-GV2v0dRNE", "youtube_id": "x-GV2v0dRNE", "readable_id": "linear-algebra-determinant-of-transpose"}, "EmTvdKkAUtE": {"duration": 709, "path": "khan/math/algebra2/functions-and-graphs/function-introduction/linear-function-graphs/", "keywords": "Linear, Function, Graphs, CC_39336_F-IF_7_a", "id": "EmTvdKkAUtE", "title": "Evaluating with function notation", "description": "Linear Function Graphs", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EmTvdKkAUtE.mp4/EmTvdKkAUtE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EmTvdKkAUtE.mp4/EmTvdKkAUtE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EmTvdKkAUtE.m3u8/EmTvdKkAUtE.m3u8"}, "slug": "linear-function-graphs", "video_id": "EmTvdKkAUtE", "youtube_id": "EmTvdKkAUtE", "readable_id": "linear-function-graphs"}, "4bZyfvKazzQ": {"duration": 249, "path": "khan/math/integral-calculus/solid_revolution_topic/area-between-curves/area-between-curves/", "keywords": "", "id": "4bZyfvKazzQ", "title": "Area between curves", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4bZyfvKazzQ.mp4/4bZyfvKazzQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4bZyfvKazzQ.mp4/4bZyfvKazzQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4bZyfvKazzQ.m3u8/4bZyfvKazzQ.m3u8"}, "slug": "area-between-curves", "video_id": "4bZyfvKazzQ", "youtube_id": "4bZyfvKazzQ", "readable_id": "area-between-curves"}, "ql8wVEetJkQ": {"duration": 146, "path": "khan/humanities/art-asia/art-japan/edo-period/hunting-for-fireflies/", "keywords": "woodblock prints", "id": "ql8wVEetJkQ", "title": "Hunting for fireflies", "description": "Melinda Takeuchi, Professor in the Department of East Asian Languages and Cultures and the Department of Art History at Stanford University, discusses the coded meanings behind a woodblock print in the Asian Art Museum's collection.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ql8wVEetJkQ.mp4/ql8wVEetJkQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ql8wVEetJkQ.mp4/ql8wVEetJkQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ql8wVEetJkQ.m3u8/ql8wVEetJkQ.m3u8"}, "slug": "hunting-for-fireflies", "video_id": "ql8wVEetJkQ", "youtube_id": "ql8wVEetJkQ", "readable_id": "hunting-for-fireflies"}, "SfWrVNyP9E8": {"duration": 252, "path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/shell-method-with-two-functions-of-x/", "keywords": "", "id": "SfWrVNyP9E8", "title": "Shell method with two functions of x", "description": "Using the shell method to rotate around a vertical line.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SfWrVNyP9E8.mp4/SfWrVNyP9E8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SfWrVNyP9E8.mp4/SfWrVNyP9E8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SfWrVNyP9E8.m3u8/SfWrVNyP9E8.m3u8"}, "slug": "shell-method-with-two-functions-of-x", "video_id": "SfWrVNyP9E8", "youtube_id": "SfWrVNyP9E8", "readable_id": "shell-method-with-two-functions-of-x"}, "0xvaYVoBwzU": {"duration": 615, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia/pneumonia-diagnosis-and-treatment/", "keywords": "", "id": "0xvaYVoBwzU", "title": "Pneumonia diagnosis and treatment", "description": "How do we know a patient has pneumonia? Learn what the lungs in chest x-rays look like, what a bronchoscopy is, and what certain blood tests mean!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0xvaYVoBwzU.mp4/0xvaYVoBwzU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0xvaYVoBwzU.mp4/0xvaYVoBwzU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0xvaYVoBwzU.m3u8/0xvaYVoBwzU.m3u8"}, "slug": "pneumonia-diagnosis-and-treatment", "video_id": "0xvaYVoBwzU", "youtube_id": "0xvaYVoBwzU", "readable_id": "pneumonia-diagnosis-and-treatment"}, "XFI7GK4Nv-s": {"duration": 179, "path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/arc-length-as-fraction-of-circumference/", "keywords": "", "id": "XFI7GK4Nv-s", "title": "Arc length as fraction of circumference", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XFI7GK4Nv-s.mp4/XFI7GK4Nv-s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XFI7GK4Nv-s.mp4/XFI7GK4Nv-s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XFI7GK4Nv-s.m3u8/XFI7GK4Nv-s.m3u8"}, "slug": "arc-length-as-fraction-of-circumference", "video_id": "XFI7GK4Nv-s", "youtube_id": "XFI7GK4Nv-s", "readable_id": "arc-length-as-fraction-of-circumference"}, "ZAbrCJxk8fs": {"duration": 316, "path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/passive-transport-by-facilitated-diffusion/", "keywords": "", "id": "ZAbrCJxk8fs", "title": "Passive Transport by Facilitated Diffusion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZAbrCJxk8fs.mp4/ZAbrCJxk8fs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZAbrCJxk8fs.mp4/ZAbrCJxk8fs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZAbrCJxk8fs.m3u8/ZAbrCJxk8fs.m3u8"}, "slug": "passive-transport-by-facilitated-diffusion", "video_id": "ZAbrCJxk8fs", "youtube_id": "ZAbrCJxk8fs", "readable_id": "passive-transport-by-facilitated-diffusion"}, "OGVJfcSckUs": {"duration": 256, "path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/basics-of-us-income-tax-rate-schedule/", "keywords": "finance, education", "id": "OGVJfcSckUs", "title": "Basics of US income tax rate schedule", "description": "Understanding that a marginal tax rate does not apply to all of income", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OGVJfcSckUs.mp4/OGVJfcSckUs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OGVJfcSckUs.mp4/OGVJfcSckUs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OGVJfcSckUs.m3u8/OGVJfcSckUs.m3u8"}, "slug": "basics-of-us-income-tax-rate-schedule", "video_id": "OGVJfcSckUs", "youtube_id": "OGVJfcSckUs", "readable_id": "basics-of-us-income-tax-rate-schedule"}, "KM_maukQebY": {"duration": 518, "path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/ortho-para-directors-ii/", "keywords": "", "id": "KM_maukQebY", "title": "Ortho-para directors II", "description": "Strong Activators", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KM_maukQebY.mp4/KM_maukQebY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KM_maukQebY.mp4/KM_maukQebY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KM_maukQebY.m3u8/KM_maukQebY.m3u8"}, "slug": "ortho-para-directors-ii", "video_id": "KM_maukQebY", "youtube_id": "KM_maukQebY", "readable_id": "ortho-para-directors-ii"}, "ayP43bc7kww": {"duration": 357, "path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/behavior-influences-attitude/", "keywords": "", "id": "ayP43bc7kww", "title": "Behavior influences attitude", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ayP43bc7kww.mp4/ayP43bc7kww.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ayP43bc7kww.mp4/ayP43bc7kww.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ayP43bc7kww.m3u8/ayP43bc7kww.m3u8"}, "slug": "behavior-influences-attitude", "video_id": "ayP43bc7kww", "youtube_id": "ayP43bc7kww", "readable_id": "behavior-influences-attitude"}, "Qt-CWv6HEII": {"duration": 369, "path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/balloon-payment-mortgage/", "keywords": "", "id": "Qt-CWv6HEII", "title": "Balloon payment mortgage", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qt-CWv6HEII.mp4/Qt-CWv6HEII.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qt-CWv6HEII.mp4/Qt-CWv6HEII.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qt-CWv6HEII.m3u8/Qt-CWv6HEII.m3u8"}, "slug": "balloon-payment-mortgage", "video_id": "Qt-CWv6HEII", "youtube_id": "Qt-CWv6HEII", "readable_id": "balloon-payment-mortgage"}, "p3fdeXgErns": {"duration": 114, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-17-nobel-prize/", "keywords": "", "id": "p3fdeXgErns", "title": "17 Nobel prize", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p3fdeXgErns.mp4/p3fdeXgErns.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p3fdeXgErns.mp4/p3fdeXgErns.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p3fdeXgErns.m3u8/p3fdeXgErns.m3u8"}, "slug": "sat-17-nobel-prize", "video_id": "p3fdeXgErns", "youtube_id": "p3fdeXgErns", "readable_id": "sat-17-nobel-prize"}, "hoRsHNSrMpc": {"duration": 709, "path": "khan/test-prep/mcat/physical-processes/normal-forces/normal-force-in-an-elevator/", "keywords": "physics, force, newton's, first, law", "id": "hoRsHNSrMpc", "title": "Normal force in an elevator", "description": "How the normal force changes when an elevator accelerates", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hoRsHNSrMpc.mp4/hoRsHNSrMpc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hoRsHNSrMpc.mp4/hoRsHNSrMpc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hoRsHNSrMpc.m3u8/hoRsHNSrMpc.m3u8"}, "slug": "normal-force-in-an-elevator", "video_id": "hoRsHNSrMpc", "youtube_id": "hoRsHNSrMpc", "readable_id": "normal-force-in-an-elevator"}, "H95wT4wT95w": {"duration": 279, "path": "khan/humanities/art-americas/us-art-19c/romanticism-us/washington-allston-elijah-in-the-desert-1818/", "keywords": "Romanticism, Khan Academy, smarthistory, art history, Google Art Project, OER, Washington Allston, Allston, Elijah in the Desert, Elijah, 1818, Museum of Fine Arts, Boston, American, Landscape", "id": "H95wT4wT95w", "title": "Allston, Elijah in the Desert", "description": "Washington Allston, Elijah in the Desert, 1818, oil on canvas, 125.09 x 184.78 cm / 49 1/4 x 72 3/4 inches (Museum of Fine Arts, Boston)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H95wT4wT95w.mp4/H95wT4wT95w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H95wT4wT95w.mp4/H95wT4wT95w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H95wT4wT95w.m3u8/H95wT4wT95w.m3u8"}, "slug": "washington-allston-elijah-in-the-desert-1818", "video_id": "H95wT4wT95w", "youtube_id": "H95wT4wT95w", "readable_id": "washington-allston-elijah-in-the-desert-1818"}, "6nZp2QGeQ9k": {"duration": 84, "path": "khan/math/pre-algebra/order-of-operations/arithmetic_properties/identity-property-of-1/", "keywords": "U01_L4_T1_we2, Identity, Property, of, CC_6_EE_2_c", "id": "6nZp2QGeQ9k", "title": "Identity property of 1", "description": "Identity Property of 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6nZp2QGeQ9k.mp4/6nZp2QGeQ9k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6nZp2QGeQ9k.mp4/6nZp2QGeQ9k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6nZp2QGeQ9k.m3u8/6nZp2QGeQ9k.m3u8"}, "slug": "identity-property-of-1", "video_id": "6nZp2QGeQ9k", "youtube_id": "6nZp2QGeQ9k", "readable_id": "identity-property-of-1"}, "Zuugb3qq0Zg": {"duration": 121, "path": "khan/test-prep/ap-art-history/south-east-se-asia/china-art/mausoleum-of-the-first-qin-emperor-unescotbs/", "keywords": "", "id": "Zuugb3qq0Zg", "title": "Terra cotta warriors from the Mausoleum of the First Qin Emperor (UNESCO/TBS)", "description": "No doubt thousands of statues still remain to be unearthed at this archaeological site, which was not discovered until 1974. Qin (d. 210 B.C.), the first unifier of China, is buried, surrounded by the famous terracotta warriors, at the centre of a complex designed to mirror the urban plan of the capital, Xianyan. The small figures are all different; with their horses, chariots and weapons, they are masterpieces of realism and also of great historical interest. Source: UNESCO TV / \u00a9 TBS Produced by TBS Supported by Sony URL: http://whc.unesco.org/en/list/441/", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zuugb3qq0Zg.mp4/Zuugb3qq0Zg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zuugb3qq0Zg.mp4/Zuugb3qq0Zg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zuugb3qq0Zg.m3u8/Zuugb3qq0Zg.m3u8"}, "slug": "mausoleum-of-the-first-qin-emperor-unescotbs", "video_id": "Zuugb3qq0Zg", "youtube_id": "Zuugb3qq0Zg", "readable_id": "mausoleum-of-the-first-qin-emperor-unescotbs"}, "2T6-eVRui1I": {"duration": 250, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/conserving-chris-ofili/", "keywords": "Tate", "id": "2T6-eVRui1I", "title": "Conserving Chris Ofili", "description": "This video brought to you by\u00a0Tate.org.uk\n\nTate\u2019s Conservation Department works hard behind the scenes to ensure that future generations can enjoy the paintings, sculptures, and other works in the collection. But it\u2019s not just the old masters that get their attention\u2013because contemporary artists work in a diverse and sometimes unusual range of materials, the team often undertakes extensive research to help them and see how their works will hold up in the future. Join paintings conservator Natasha Walker as she explains how the team goes about conserving Chris Ofili\u2019s paintings by creating replicas of his works and subjecting them to drops, falls, cracks, and accelerated aging processes. With the help of the artist, his assistants, and even an elephant, the team\u2019s \u201cChris Ofilis\u201d might not be as good as the real thing, but they will help protect the originals well into the future.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2T6-eVRui1I.mp4/2T6-eVRui1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2T6-eVRui1I.mp4/2T6-eVRui1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2T6-eVRui1I.m3u8/2T6-eVRui1I.m3u8"}, "slug": "conserving-chris-ofili", "video_id": "2T6-eVRui1I", "youtube_id": "2T6-eVRui1I", "readable_id": "conserving-chris-ofili"}, "J0u_MugpslU": {"duration": 133, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-6/", "keywords": "", "id": "J0u_MugpslU", "title": "6 Solving for 2x", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J0u_MugpslU.mp4/J0u_MugpslU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J0u_MugpslU.mp4/J0u_MugpslU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J0u_MugpslU.m3u8/J0u_MugpslU.m3u8"}, "slug": "sat-2009-may-3-6", "video_id": "J0u_MugpslU", "youtube_id": "J0u_MugpslU", "readable_id": "sat-2009-may-3-6"}, "Uc2Tm4Lr7uI": {"duration": 388, "path": "khan/math/pre-algebra/rates-and-ratios/rates_tutorial/multiple-rates-word-problem/", "keywords": "", "id": "Uc2Tm4Lr7uI", "title": "Multiple rates word problem", "description": "Sometimes you'll need to solve for multiple parts of the equation before getting at the answer. Here we solve for average speed, but first we have to determine total distance and total time.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Uc2Tm4Lr7uI.mp4/Uc2Tm4Lr7uI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Uc2Tm4Lr7uI.mp4/Uc2Tm4Lr7uI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Uc2Tm4Lr7uI.m3u8/Uc2Tm4Lr7uI.m3u8"}, "slug": "multiple-rates-word-problem", "video_id": "Uc2Tm4Lr7uI", "youtube_id": "Uc2Tm4Lr7uI", "readable_id": "multiple-rates-word-problem"}, "EbmgLiSVACU": {"duration": 352, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/algebra-foundations-computing-scientific-notation/simplifying-a-complicated-expression-into-scientific-notation/", "keywords": "", "id": "EbmgLiSVACU", "title": "Simplifying a complicated expression into scientific notation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EbmgLiSVACU.mp4/EbmgLiSVACU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EbmgLiSVACU.mp4/EbmgLiSVACU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EbmgLiSVACU.m3u8/EbmgLiSVACU.m3u8"}, "slug": "simplifying-a-complicated-expression-into-scientific-notation", "video_id": "EbmgLiSVACU", "youtube_id": "EbmgLiSVACU", "readable_id": "simplifying-a-complicated-expression-into-scientific-notation"}, "2oHUkHYtQoM": {"duration": 255, "path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/approximating-equation-of-tangent-line-word-problem-1/", "keywords": "", "id": "2oHUkHYtQoM", "title": "Approximating equation of tangent line word problem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2oHUkHYtQoM.mp4/2oHUkHYtQoM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2oHUkHYtQoM.mp4/2oHUkHYtQoM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2oHUkHYtQoM.m3u8/2oHUkHYtQoM.m3u8"}, "slug": "approximating-equation-of-tangent-line-word-problem-1", "video_id": "2oHUkHYtQoM", "youtube_id": "2oHUkHYtQoM", "readable_id": "approximating-equation-of-tangent-line-word-problem-1"}, "6sP3kV-zgZk": {"duration": 454, "path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/first-law-of-thermodynamics-problem-solving/", "keywords": "", "id": "6sP3kV-zgZk", "title": "First law of thermodynamics problem solving", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6sP3kV-zgZk.mp4/6sP3kV-zgZk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6sP3kV-zgZk.mp4/6sP3kV-zgZk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6sP3kV-zgZk.m3u8/6sP3kV-zgZk.m3u8"}, "slug": "first-law-of-thermodynamics-problem-solving", "video_id": "6sP3kV-zgZk", "youtube_id": "6sP3kV-zgZk", "readable_id": "first-law-of-thermodynamics-problem-solving"}, "bQioHx12JuY": {"duration": 749, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/meet-the-placenta/", "keywords": "", "id": "bQioHx12JuY", "title": "Meet the placenta!", "description": "Learn how the needs of the fetus are met by the placenta, which is a special organ that belongs to both the mother and the fetus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bQioHx12JuY.mp4/bQioHx12JuY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bQioHx12JuY.mp4/bQioHx12JuY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bQioHx12JuY.m3u8/bQioHx12JuY.m3u8"}, "slug": "meet-the-placenta", "video_id": "bQioHx12JuY", "youtube_id": "bQioHx12JuY", "readable_id": "meet-the-placenta"}, "A_ESfuN1Pkg": {"duration": 279, "path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/introduction-to-complex-numbers/", "keywords": "", "id": "A_ESfuN1Pkg", "title": "Introduction to complex numbers", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A_ESfuN1Pkg.mp4/A_ESfuN1Pkg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A_ESfuN1Pkg.mp4/A_ESfuN1Pkg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A_ESfuN1Pkg.m3u8/A_ESfuN1Pkg.m3u8"}, "slug": "introduction-to-complex-numbers", "video_id": "A_ESfuN1Pkg", "youtube_id": "A_ESfuN1Pkg", "readable_id": "introduction-to-complex-numbers"}, "MmRgMAZyYN0": {"duration": 903, "path": "khan/humanities/history/euro-hist/cold-war/communism/", "keywords": "Marx, Lenin, capitalism", "id": "MmRgMAZyYN0", "title": "Communism", "description": "Overview of Communism and Marxist-Leninist States", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MmRgMAZyYN0.mp4/MmRgMAZyYN0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MmRgMAZyYN0.mp4/MmRgMAZyYN0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MmRgMAZyYN0.m3u8/MmRgMAZyYN0.m3u8"}, "slug": "communism", "video_id": "MmRgMAZyYN0", "youtube_id": "MmRgMAZyYN0", "readable_id": "communism"}, "E_1gEtiGPNI": {"duration": 571, "path": "khan/math/differential-calculus/taking-derivatives/product_rule/quotient-rule/", "keywords": "derivatives, calculus, trigonometry, khan, academy", "id": "E_1gEtiGPNI", "title": "Quotient rule and common derivatives", "description": "Why the quotient rule is the same thing as the product rule. Introduction to the derivative of e^x, ln x, sin x, cos x, and tan x", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E_1gEtiGPNI.mp4/E_1gEtiGPNI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E_1gEtiGPNI.mp4/E_1gEtiGPNI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E_1gEtiGPNI.m3u8/E_1gEtiGPNI.m3u8"}, "slug": "quotient-rule", "video_id": "E_1gEtiGPNI", "youtube_id": "E_1gEtiGPNI", "readable_id": "quotient-rule"}, "5Fa8U6BkhNo": {"duration": 390, "path": "khan/test-prep/mcat/behavior/human-development/brain-changes-during-adolescence/", "keywords": "Brain (Anatomical Structure)", "id": "5Fa8U6BkhNo", "title": "Brain changes during adolescence", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5Fa8U6BkhNo.mp4/5Fa8U6BkhNo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5Fa8U6BkhNo.mp4/5Fa8U6BkhNo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5Fa8U6BkhNo.m3u8/5Fa8U6BkhNo.m3u8"}, "slug": "brain-changes-during-adolescence", "video_id": "5Fa8U6BkhNo", "youtube_id": "5Fa8U6BkhNo", "readable_id": "brain-changes-during-adolescence"}, "LNSB0N6esPU": {"duration": 393, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/x-and-y-intercepts/introduction-to-intercepts/", "keywords": "", "id": "LNSB0N6esPU", "title": "Introduction to intercepts", "description": "Learn what x- and y-intercepts are. \u00a0The equations used in this video are y = 0.5x - 3 and 5x + 6y = 30.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LNSB0N6esPU.mp4/LNSB0N6esPU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LNSB0N6esPU.mp4/LNSB0N6esPU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LNSB0N6esPU.m3u8/LNSB0N6esPU.m3u8"}, "slug": "introduction-to-intercepts", "video_id": "LNSB0N6esPU", "youtube_id": "LNSB0N6esPU", "readable_id": "introduction-to-intercepts"}, "qSktOkaW6EA": {"duration": 108, "path": "khan/math/algebra/algebra-functions/function-inputs-and-outputs/different-inputs-giving-same-value-for-function/", "keywords": "", "id": "qSktOkaW6EA", "title": "How to find two function inputs with the same output given graph (example)", "description": "Sal finds the input value other than -5 for which f(x)=f(-5), given the graph of f.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qSktOkaW6EA.mp4/qSktOkaW6EA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qSktOkaW6EA.mp4/qSktOkaW6EA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qSktOkaW6EA.m3u8/qSktOkaW6EA.m3u8"}, "slug": "different-inputs-giving-same-value-for-function", "video_id": "qSktOkaW6EA", "youtube_id": "qSktOkaW6EA", "readable_id": "different-inputs-giving-same-value-for-function"}, "ShpI3gPgLBA": {"duration": 537, "path": "khan/math/integral-calculus/integration-techniques/u_substitution/doing-u-substitution-twice-second-time-with-w/", "keywords": "", "id": "ShpI3gPgLBA", "title": "Doing u-substitution twice (second time with w)", "description": "Example where we do substitution twice to get the integral into a reasonable form", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ShpI3gPgLBA.mp4/ShpI3gPgLBA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ShpI3gPgLBA.mp4/ShpI3gPgLBA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ShpI3gPgLBA.m3u8/ShpI3gPgLBA.m3u8"}, "slug": "doing-u-substitution-twice-second-time-with-w", "video_id": "ShpI3gPgLBA", "youtube_id": "ShpI3gPgLBA", "readable_id": "doing-u-substitution-twice-second-time-with-w"}, "S4iQ46ISqRQ": {"duration": 180, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lakeshia-grant/lakeshia-grant-0/", "keywords": "", "id": "S4iQ46ISqRQ", "title": "Being Heard and Giving Others a Voice", "description": "LaKeshia Grant founded Virtual Enterprise Architects as a place where she would have a voice and create an environment where others could be heard. She discusses her industry and encourages would-be entrepreneurs to incorporate their core values in their business. Grant\u2019s mother may not know exactly what the information technology business does, but she instilled a strong work ethic and the spirit of entrepreneurship in her daughter.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S4iQ46ISqRQ.mp4/S4iQ46ISqRQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S4iQ46ISqRQ.mp4/S4iQ46ISqRQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S4iQ46ISqRQ.m3u8/S4iQ46ISqRQ.m3u8"}, "slug": "lakeshia-grant-0", "video_id": "S4iQ46ISqRQ", "youtube_id": "S4iQ46ISqRQ", "readable_id": "lakeshia-grant-0"}, "43AS7bPUORc": {"duration": 453, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/disc-method-around-y-axis/", "keywords": "", "id": "43AS7bPUORc", "title": "Disc method around y-axis", "description": "Finding the volume of a figure that is rotated around the y-axis using the disc method", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/43AS7bPUORc.mp4/43AS7bPUORc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/43AS7bPUORc.mp4/43AS7bPUORc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/43AS7bPUORc.m3u8/43AS7bPUORc.m3u8"}, "slug": "disc-method-around-y-axis", "video_id": "43AS7bPUORc", "youtube_id": "43AS7bPUORc", "readable_id": "disc-method-around-y-axis"}, "pPnxPrhf6Ww": {"duration": 469, "path": "khan/math/probability/descriptive-statistics/central_tendency/comparing-distribution-means/", "keywords": "", "id": "pPnxPrhf6Ww", "title": "Comparing means of distributions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pPnxPrhf6Ww.mp4/pPnxPrhf6Ww.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pPnxPrhf6Ww.mp4/pPnxPrhf6Ww.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pPnxPrhf6Ww.m3u8/pPnxPrhf6Ww.m3u8"}, "slug": "comparing-distribution-means", "video_id": "pPnxPrhf6Ww", "youtube_id": "pPnxPrhf6Ww", "readable_id": "comparing-distribution-means"}, "nnl3x1wo25g": {"duration": 213, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/american-call-options/", "keywords": "American, Call, Options", "id": "nnl3x1wo25g", "title": "American call options", "description": "American Call Options", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nnl3x1wo25g.mp4/nnl3x1wo25g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nnl3x1wo25g.mp4/nnl3x1wo25g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nnl3x1wo25g.m3u8/nnl3x1wo25g.m3u8"}, "slug": "american-call-options", "video_id": "nnl3x1wo25g", "youtube_id": "nnl3x1wo25g", "readable_id": "american-call-options"}, "P9lTAUtnreo": {"duration": 662, "path": "khan/partner-content/big-history-project/big-bang/how-did-big-bang-change/bhp-view-of-the-universe-change/", "keywords": "", "id": "P9lTAUtnreo", "title": "How Did Our View of the Universe Change?", "description": "Geocentric to heliocentric, and beyond. An overview of the major changes in the way people have viewed the Universe.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P9lTAUtnreo.mp4/P9lTAUtnreo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P9lTAUtnreo.mp4/P9lTAUtnreo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P9lTAUtnreo.m3u8/P9lTAUtnreo.m3u8"}, "slug": "bhp-view-of-the-universe-change", "video_id": "P9lTAUtnreo", "youtube_id": "P9lTAUtnreo", "readable_id": "bhp-view-of-the-universe-change"}, "6D_yOm6bjkw": {"duration": 818, "path": "khan/test-prep/mcat/behavior/psychological-disorders/biological-basis-of-schizophrenia/", "keywords": "", "id": "6D_yOm6bjkw", "title": "Biological basis of schizophrenia", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6D_yOm6bjkw.mp4/6D_yOm6bjkw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6D_yOm6bjkw.mp4/6D_yOm6bjkw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6D_yOm6bjkw.m3u8/6D_yOm6bjkw.m3u8"}, "slug": "biological-basis-of-schizophrenia", "video_id": "6D_yOm6bjkw", "youtube_id": "6D_yOm6bjkw", "readable_id": "biological-basis-of-schizophrenia"}, "n0DLSIOYBsQ": {"duration": 372, "path": "khan/math/trigonometry/less-basic-trigonometry/pythagorean-identity/pythagorean-trig-identity-from-unit-circle/", "keywords": "", "id": "n0DLSIOYBsQ", "title": "Pythagorean trig identity from unit circle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n0DLSIOYBsQ.mp4/n0DLSIOYBsQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n0DLSIOYBsQ.mp4/n0DLSIOYBsQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n0DLSIOYBsQ.m3u8/n0DLSIOYBsQ.m3u8"}, "slug": "pythagorean-trig-identity-from-unit-circle", "video_id": "n0DLSIOYBsQ", "youtube_id": "n0DLSIOYBsQ", "readable_id": "pythagorean-trig-identity-from-unit-circle"}, "ItW5CxLsLSo": {"duration": 591, "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex2-part-2-evaluating-integral/", "keywords": "surface, integral", "id": "ItW5CxLsLSo", "title": "Surface integral ex2 part 2: Evaluating integral", "description": "Evaluating the surface integral", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ItW5CxLsLSo.mp4/ItW5CxLsLSo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ItW5CxLsLSo.mp4/ItW5CxLsLSo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ItW5CxLsLSo.m3u8/ItW5CxLsLSo.m3u8"}, "slug": "surface-integral-ex2-part-2-evaluating-integral", "video_id": "ItW5CxLsLSo", "youtube_id": "ItW5CxLsLSo", "readable_id": "surface-integral-ex2-part-2-evaluating-integral"}, "WBWV_uvgC6w": {"duration": 648, "path": "khan/test-prep/gmat/problem-solving/gmat-math-29/", "keywords": "gmat, math, problem, solving", "id": "WBWV_uvgC6w", "title": "GMAT: Math 29", "description": "148-153, pgs. 172-173", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WBWV_uvgC6w.mp4/WBWV_uvgC6w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WBWV_uvgC6w.mp4/WBWV_uvgC6w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WBWV_uvgC6w.m3u8/WBWV_uvgC6w.m3u8"}, "slug": "gmat-math-29", "video_id": "WBWV_uvgC6w", "youtube_id": "WBWV_uvgC6w", "readable_id": "gmat-math-29"}, "9E1cA3j_xY8": {"duration": 721, "path": "khan/humanities/art-1010/wwi-dada/dada1/hannah-h-ch-cut-with-the-kitchen-knife-1919-20/", "keywords": "Hannah H\u00f6ch, Dada, Photomontage, Cut with the Kitchen Knife, German art", "id": "9E1cA3j_xY8", "title": "H\u00f6ch, Cut with the Kitchen Knife Dada Through the Last Weimar Beer-Belly Cultural Epoch of Germany", "description": "Hannah H\u00f6ch, Cut with the Kitchen Knife Dada Through the Last Weimar Beer-Belly Cultural Epoch of Germany, collage, mixed media, 1919-1920", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9E1cA3j_xY8.mp4/9E1cA3j_xY8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9E1cA3j_xY8.mp4/9E1cA3j_xY8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9E1cA3j_xY8.m3u8/9E1cA3j_xY8.m3u8"}, "slug": "hannah-h-ch-cut-with-the-kitchen-knife-1919-20", "video_id": "9E1cA3j_xY8", "youtube_id": "9E1cA3j_xY8", "readable_id": "hannah-h-ch-cut-with-the-kitchen-knife-1919-20"}, "dNoeLF6I52s": {"duration": 288, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/vel-zquez-los-borrachos-the-drunks-1628-1629/", "keywords": "art history, Smarthistory, Velazquez, Madrid, Prado, Spanish art, Baroque art", "id": "dNoeLF6I52s", "title": "Vel\u00e1zquez Los Borrachos or the Triumph of Bacchus", "description": "Diego Rodr\u00edguez de Silva y Vel\u00e1zquez, Los Borrachos (The Drunks) or The Triumph of Bacchus, 1628-1629, 165 x 225 cm (Museo Nacional del Prado, Madrid). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dNoeLF6I52s.mp4/dNoeLF6I52s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dNoeLF6I52s.mp4/dNoeLF6I52s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dNoeLF6I52s.m3u8/dNoeLF6I52s.m3u8"}, "slug": "vel-zquez-los-borrachos-the-drunks-1628-1629", "video_id": "dNoeLF6I52s", "youtube_id": "dNoeLF6I52s", "readable_id": "vel-zquez-los-borrachos-the-drunks-1628-1629"}, "rDjWrNRKfvg": {"duration": 388, "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/liver/", "keywords": "MCAT", "id": "rDjWrNRKfvg", "title": "Liver", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rDjWrNRKfvg.mp4/rDjWrNRKfvg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rDjWrNRKfvg.mp4/rDjWrNRKfvg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rDjWrNRKfvg.m3u8/rDjWrNRKfvg.m3u8"}, "slug": "liver", "video_id": "rDjWrNRKfvg", "youtube_id": "rDjWrNRKfvg", "readable_id": "liver"}, "zopoN2i7ALQ": {"duration": 578, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/myosin-and-actin/", "keywords": "myosin, actin, muscle", "id": "zopoN2i7ALQ", "title": "Myosin and actin", "description": "How myosin and actin interact to produce mechanical force.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zopoN2i7ALQ.mp4/zopoN2i7ALQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zopoN2i7ALQ.mp4/zopoN2i7ALQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zopoN2i7ALQ.m3u8/zopoN2i7ALQ.m3u8"}, "slug": "myosin-and-actin", "video_id": "zopoN2i7ALQ", "youtube_id": "zopoN2i7ALQ", "readable_id": "myosin-and-actin"}, "BM-My1AheLw": {"duration": 587, "path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/steric-number-sp3-hybridization/", "keywords": "", "id": "BM-My1AheLw", "title": "Steric number and sp3 hybridization", "description": "Using steric number to calculate number of hybrid orbitals.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BM-My1AheLw.mp4/BM-My1AheLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BM-My1AheLw.mp4/BM-My1AheLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BM-My1AheLw.m3u8/BM-My1AheLw.m3u8"}, "slug": "steric-number-sp3-hybridization", "video_id": "BM-My1AheLw", "youtube_id": "BM-My1AheLw", "readable_id": "steric-number-sp3-hybridization"}, "hH1a1v1JNAk": {"duration": 335, "path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/c-zanne-still-life-with-apples-1895-98-moma/", "keywords": "cezanne, art, art history, smarthistory, Post-Impressionism, MoMA, Museum of Modern Art", "id": "hH1a1v1JNAk", "title": "C\u00e9zanne, Still Life with Apples", "description": "C\u00e9zanne, Still Life with Apples,\u00a01895-98 (MoMA). Speakers:\u00a0Beth Harris and Steven Zucker.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hH1a1v1JNAk.mp4/hH1a1v1JNAk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hH1a1v1JNAk.mp4/hH1a1v1JNAk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hH1a1v1JNAk.m3u8/hH1a1v1JNAk.m3u8"}, "slug": "c-zanne-still-life-with-apples-1895-98-moma", "video_id": "hH1a1v1JNAk", "youtube_id": "hH1a1v1JNAk", "readable_id": "c-zanne-still-life-with-apples-1895-98-moma"}, "JPhd76sGIs8": {"duration": 233, "path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/maslows-hierarchy-of-needs/", "keywords": "", "id": "JPhd76sGIs8", "title": "Maslow's hierarchy of needs", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JPhd76sGIs8.mp4/JPhd76sGIs8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JPhd76sGIs8.mp4/JPhd76sGIs8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JPhd76sGIs8.m3u8/JPhd76sGIs8.m3u8"}, "slug": "maslows-hierarchy-of-needs", "video_id": "JPhd76sGIs8", "youtube_id": "JPhd76sGIs8", "readable_id": "maslows-hierarchy-of-needs"}, "36dg_h4gwNk": {"duration": 283, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/centriacinar-panacinar-emphysema/", "keywords": "", "id": "36dg_h4gwNk", "title": "Centriacinar emphysema vs panacinar emphysema", "description": "Centriacinar and panacinar are different classifications of disease emphysema based on the location of the damaged lung tissue. Learn how inflammation can give rise to centriacinar emphysema, and how a deficiency in alpha-1-antitrypsin can lead to panacinar emphysema.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/36dg_h4gwNk.mp4/36dg_h4gwNk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/36dg_h4gwNk.mp4/36dg_h4gwNk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/36dg_h4gwNk.m3u8/36dg_h4gwNk.m3u8"}, "slug": "centriacinar-panacinar-emphysema", "video_id": "36dg_h4gwNk", "youtube_id": "36dg_h4gwNk", "readable_id": "centriacinar-panacinar-emphysema"}, "Ot1We4_EfRE": {"duration": 573, "path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/adh-effects-on-blood-pressure/", "keywords": "", "id": "Ot1We4_EfRE", "title": "ADH effects on blood pressure", "description": "See how ADH acts on blood vessels and the kidney to raise blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ot1We4_EfRE.mp4/Ot1We4_EfRE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ot1We4_EfRE.mp4/Ot1We4_EfRE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ot1We4_EfRE.m3u8/Ot1We4_EfRE.m3u8"}, "slug": "adh-effects-on-blood-pressure", "video_id": "Ot1We4_EfRE", "youtube_id": "Ot1We4_EfRE", "readable_id": "adh-effects-on-blood-pressure"}, "JAXyLhvZ-Vg": {"duration": 620, "path": "khan/math/multivariable-calculus/partial_derivatives_topic/divergence/divergence-1/", "keywords": "vector, field, divergence", "id": "JAXyLhvZ-Vg", "title": "Divergence 1", "description": "Introduction to the divergence of a vector field.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JAXyLhvZ-Vg.mp4/JAXyLhvZ-Vg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JAXyLhvZ-Vg.mp4/JAXyLhvZ-Vg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JAXyLhvZ-Vg.m3u8/JAXyLhvZ-Vg.m3u8"}, "slug": "divergence-1", "video_id": "JAXyLhvZ-Vg", "youtube_id": "JAXyLhvZ-Vg", "readable_id": "divergence-1"}, "lrIUaN_UKYs": {"duration": 450, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-eyes/", "keywords": "Bottle cap, eyes, LEDs, Arduino, make, hack, diy, bit-zee", "id": "lrIUaN_UKYs", "title": "LED eyes", "description": "In this video we create and wire Bit-zee's tri-color LED eyes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lrIUaN_UKYs.mp4/lrIUaN_UKYs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lrIUaN_UKYs.mp4/lrIUaN_UKYs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lrIUaN_UKYs.m3u8/lrIUaN_UKYs.m3u8"}, "slug": "bit-zee-s-eyes", "video_id": "lrIUaN_UKYs", "youtube_id": "lrIUaN_UKYs", "readable_id": "bit-zee-s-eyes"}, "R0EQg9vgbQw": {"duration": 506, "path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formula-proofs/proof-angle-addition-sine/", "keywords": "", "id": "R0EQg9vgbQw", "title": "Proof of angle addition formula for sine", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R0EQg9vgbQw.mp4/R0EQg9vgbQw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R0EQg9vgbQw.mp4/R0EQg9vgbQw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R0EQg9vgbQw.m3u8/R0EQg9vgbQw.m3u8"}, "slug": "proof-angle-addition-sine", "video_id": "R0EQg9vgbQw", "youtube_id": "R0EQg9vgbQw", "readable_id": "proof-angle-addition-sine"}, "STcsaKuW-24": {"duration": 501, "path": "khan/math/algebra/quadratics/factoring-quadratics/example-4-solving-a-quadratic-equation-by-factoring/", "keywords": "u12_l3_t1_we3, Applications, Problem, Factoring, Quadratics, CC_39336_A-REI_4, CC_39336_A-SSE_3_a", "id": "STcsaKuW-24", "title": "Finding dimensions of triangle from area", "description": "Applications Problem Factoring Quadratics", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/STcsaKuW-24.mp4/STcsaKuW-24.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/STcsaKuW-24.mp4/STcsaKuW-24.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/STcsaKuW-24.m3u8/STcsaKuW-24.m3u8"}, "slug": "example-4-solving-a-quadratic-equation-by-factoring", "video_id": "STcsaKuW-24", "youtube_id": "STcsaKuW-24", "readable_id": "example-4-solving-a-quadratic-equation-by-factoring"}, "tUqyJgmGY7k": {"duration": 372, "path": "khan/math/geometry/triangle-properties/triangle_property_review/euler-line/", "keywords": "nine, point, circle", "id": "tUqyJgmGY7k", "title": "Euler line", "description": "The magic and mystery of the Euler Line", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tUqyJgmGY7k.mp4/tUqyJgmGY7k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tUqyJgmGY7k.mp4/tUqyJgmGY7k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tUqyJgmGY7k.m3u8/tUqyJgmGY7k.m3u8"}, "slug": "euler-line", "video_id": "tUqyJgmGY7k", "youtube_id": "tUqyJgmGY7k", "readable_id": "euler-line"}, "5dlE_wobLoM": {"duration": 180, "path": "khan/science/discoveries-projects/robots/all-about-spout/spout-current-reversing-switch/", "keywords": "", "id": "5dlE_wobLoM", "title": "Spout's reversing circuit and final assembly", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5dlE_wobLoM.mp4/5dlE_wobLoM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5dlE_wobLoM.mp4/5dlE_wobLoM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5dlE_wobLoM.m3u8/5dlE_wobLoM.m3u8"}, "slug": "spout-current-reversing-switch", "video_id": "5dlE_wobLoM", "youtube_id": "5dlE_wobLoM", "readable_id": "spout-current-reversing-switch"}, "4PPMnI8-Zsc": {"duration": 732, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-more-proofs/", "keywords": "geometry, proofs", "id": "4PPMnI8-Zsc", "title": "CA Geometry: More proofs", "description": "7-10, more proofs (10 continued in next video)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4PPMnI8-Zsc.mp4/4PPMnI8-Zsc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4PPMnI8-Zsc.mp4/4PPMnI8-Zsc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4PPMnI8-Zsc.m3u8/4PPMnI8-Zsc.m3u8"}, "slug": "ca-geometry-more-proofs", "video_id": "4PPMnI8-Zsc", "youtube_id": "4PPMnI8-Zsc", "readable_id": "ca-geometry-more-proofs"}, "CJRQ8gOjq4E": {"duration": 626, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/organic-chemistry-naming-examples-2/", "keywords": "Organic, Chemistry, Naming, Examples", "id": "CJRQ8gOjq4E", "title": "Organic chemistry naming examples 2", "description": "Organic Chemistry Naming Examples 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CJRQ8gOjq4E.mp4/CJRQ8gOjq4E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CJRQ8gOjq4E.mp4/CJRQ8gOjq4E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CJRQ8gOjq4E.m3u8/CJRQ8gOjq4E.m3u8"}, "slug": "organic-chemistry-naming-examples-2", "video_id": "CJRQ8gOjq4E", "youtube_id": "CJRQ8gOjq4E", "readable_id": "organic-chemistry-naming-examples-2"}, "EblnaLMjdNg": {"duration": 160, "path": "khan/humanities/monarchy-enlightenment/rococo/unlocking-18th-c-french-mechanical-table/", "keywords": "", "id": "EblnaLMjdNg", "title": "Unlocking an 18th-century French mechanical table", "description": "Discover how an affluent lady of 18th-century France may have used this ornate mechanical table for leisure and work. With a turn of a key, this table transforms into a desk with compartments. Learn about how it operates and its many features. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EblnaLMjdNg.mp4/EblnaLMjdNg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EblnaLMjdNg.mp4/EblnaLMjdNg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EblnaLMjdNg.m3u8/EblnaLMjdNg.m3u8"}, "slug": "unlocking-18th-c-french-mechanical-table", "video_id": "EblnaLMjdNg", "youtube_id": "EblnaLMjdNg", "readable_id": "unlocking-18th-c-french-mechanical-table"}, "0-pHx5rKKqI": {"duration": 483, "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/overview-of-sensation-and-meissners-corpuscles/", "keywords": "", "id": "0-pHx5rKKqI", "title": "Overview of Sensation and Meissner's Corpuscle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0-pHx5rKKqI.mp4/0-pHx5rKKqI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0-pHx5rKKqI.mp4/0-pHx5rKKqI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0-pHx5rKKqI.m3u8/0-pHx5rKKqI.m3u8"}, "slug": "overview-of-sensation-and-meissners-corpuscles", "video_id": "0-pHx5rKKqI", "youtube_id": "0-pHx5rKKqI", "readable_id": "overview-of-sensation-and-meissners-corpuscles"}, "662koqcIXSk": {"duration": 579, "path": "khan/science/biology/macromolecules/carbohydrates-and-sugars/molecular-structure-of-fructose/", "keywords": "education,online learning,learning,lessons,fructose,pyranose,furanose,sucrose", "id": "662koqcIXSk", "title": "Molecular structure of fructose", "description": "Fructose in comparison with glucose. Pyranose and furanose rings. Sucrose made from glucose and fructose.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/662koqcIXSk.mp4/662koqcIXSk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/662koqcIXSk.mp4/662koqcIXSk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/662koqcIXSk.m3u8/662koqcIXSk.m3u8"}, "slug": "molecular-structure-of-fructose", "video_id": "662koqcIXSk", "youtube_id": "662koqcIXSk", "readable_id": "molecular-structure-of-fructose"}, "EgtB1aF3MIU": {"duration": 102, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-5-values-on-number-line/", "keywords": "", "id": "EgtB1aF3MIU", "title": "5 Values on number line", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EgtB1aF3MIU.mp4/EgtB1aF3MIU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EgtB1aF3MIU.mp4/EgtB1aF3MIU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EgtB1aF3MIU.m3u8/EgtB1aF3MIU.m3u8"}, "slug": "sat-5-values-on-number-line", "video_id": "EgtB1aF3MIU", "youtube_id": "EgtB1aF3MIU", "readable_id": "sat-5-values-on-number-line"}, "9_3OxtdqmqE": {"duration": 318, "path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/proof-corresponding-angle-equivalence-implies-parallel-lines/", "keywords": "transversal", "id": "9_3OxtdqmqE", "title": "Proof: Corresponding angle equivalence implies parallel lines", "description": "Proof by contradiction that corresponding angle equivalence implies parallel lines", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9_3OxtdqmqE.mp4/9_3OxtdqmqE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9_3OxtdqmqE.mp4/9_3OxtdqmqE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9_3OxtdqmqE.m3u8/9_3OxtdqmqE.m3u8"}, "slug": "proof-corresponding-angle-equivalence-implies-parallel-lines", "video_id": "9_3OxtdqmqE", "youtube_id": "9_3OxtdqmqE", "readable_id": "proof-corresponding-angle-equivalence-implies-parallel-lines"}, "0njioQqIxKY": {"duration": 184, "path": "khan/math/pre-algebra/fractions-pre-alg/add-and-subtract-fracs-pre-alg/subtracting-fractions-word-problem-1/", "keywords": "", "id": "0njioQqIxKY", "title": "Word problem: What fraction of an hour should the piano still be practiced?", "description": "Better get practicing, Pedro! You have exactly (a fraction) more of an hour to practice the piano.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0njioQqIxKY.mp4/0njioQqIxKY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0njioQqIxKY.mp4/0njioQqIxKY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0njioQqIxKY.m3u8/0njioQqIxKY.m3u8"}, "slug": "subtracting-fractions-word-problem-1", "video_id": "0njioQqIxKY", "youtube_id": "0njioQqIxKY", "readable_id": "subtracting-fractions-word-problem-1"}, "4j13InegUPk": {"duration": 288, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/william-holman-hunt-claudio-and-isabella-1850/", "keywords": "Hunt Claudio and Isabella, smarthistory, art history, Pre-Raphaelite, Tate Britain", "id": "4j13InegUPk", "title": "Hunt, Claudio and Isabella", "description": "William Holman Hunt, Claudio and Isabella, 1850, oil on mahogany, 758 x 426 x 10 mm (Tate Britain) From William Shakespeare's Measure for Measure, Act III, scene 1 (a room in a prison): ISABELLA What says my brother? CLAUDIO Death is a fearful thing. ISABELLA And shamed life a hateful. CLAUDIO Ay, but to die, and go we know not where; To lie in cold obstruction and to rot; This sensible warm motion to become A kneaded clod; and the delighted spirit To bathe in fiery floods, or to reside In thrilling region of thick-ribbed ice; To be imprison'd in the viewless winds, And blown with restless violence round about The pendent world; or to be worse than worst Of those that lawless and incertain thought Imagine howling: 'tis too horrible! The weariest and most loathed worldly life That age, ache, penury and imprisonment Can lay on nature is a paradise To what we fear of death. ISABELLA Alas, alas!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4j13InegUPk.mp4/4j13InegUPk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4j13InegUPk.mp4/4j13InegUPk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4j13InegUPk.m3u8/4j13InegUPk.m3u8"}, "slug": "william-holman-hunt-claudio-and-isabella-1850", "video_id": "4j13InegUPk", "youtube_id": "4j13InegUPk", "readable_id": "william-holman-hunt-claudio-and-isabella-1850"}, "ZSESJ8TeGSI": {"duration": 596, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-9/", "keywords": "polynomial, root, sums", "id": "ZSESJ8TeGSI", "title": "2003 AIME II problem 9", "description": "Sum of polynomial evaluated at roots of another polynomial", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZSESJ8TeGSI.mp4/ZSESJ8TeGSI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZSESJ8TeGSI.mp4/ZSESJ8TeGSI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZSESJ8TeGSI.m3u8/ZSESJ8TeGSI.m3u8"}, "slug": "2003-aime-ii-problem-9", "video_id": "ZSESJ8TeGSI", "youtube_id": "ZSESJ8TeGSI", "readable_id": "2003-aime-ii-problem-9"}, "wluZFFkJ2io": {"duration": 298, "path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/hybrid-arm/", "keywords": "", "id": "wluZFFkJ2io", "title": "Hybrid ARM", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wluZFFkJ2io.mp4/wluZFFkJ2io.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wluZFFkJ2io.mp4/wluZFFkJ2io.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wluZFFkJ2io.m3u8/wluZFFkJ2io.m3u8"}, "slug": "hybrid-arm", "video_id": "wluZFFkJ2io", "youtube_id": "wluZFFkJ2io", "readable_id": "hybrid-arm"}, "qrxvbRA2xCI": {"duration": 157, "path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/gale-crater/", "keywords": "", "id": "qrxvbRA2xCI", "title": "Destination: Gale crater", "description": "Details on the landing site: Gale Crater", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qrxvbRA2xCI.mp4/qrxvbRA2xCI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qrxvbRA2xCI.mp4/qrxvbRA2xCI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qrxvbRA2xCI.m3u8/qrxvbRA2xCI.m3u8"}, "slug": "gale-crater", "video_id": "qrxvbRA2xCI", "youtube_id": "qrxvbRA2xCI", "readable_id": "gale-crater"}, "TugWqiUjOU4": {"duration": 307, "path": "khan/math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity/example-with-trig-functions-and-ratios/", "keywords": "", "id": "TugWqiUjOU4", "title": "Example with trig functions and ratios", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TugWqiUjOU4.mp4/TugWqiUjOU4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TugWqiUjOU4.mp4/TugWqiUjOU4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TugWqiUjOU4.m3u8/TugWqiUjOU4.m3u8"}, "slug": "example-with-trig-functions-and-ratios", "video_id": "TugWqiUjOU4", "youtube_id": "TugWqiUjOU4", "readable_id": "example-with-trig-functions-and-ratios"}, "m44llkkWI0g": {"duration": 783, "path": "khan/test-prep/gmat/problem-solving/gmat-math-19/", "keywords": "gmat, math, problem, solving", "id": "m44llkkWI0g", "title": "GMAT: Math 19", "description": "100-105, pg. 165", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m44llkkWI0g.mp4/m44llkkWI0g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m44llkkWI0g.mp4/m44llkkWI0g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m44llkkWI0g.m3u8/m44llkkWI0g.m3u8"}, "slug": "gmat-math-19", "video_id": "m44llkkWI0g", "youtube_id": "m44llkkWI0g", "readable_id": "gmat-math-19"}, "RSMtgI8yyfg": {"duration": 429, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/pulmonary-hypertension-treatment/", "keywords": "", "id": "RSMtgI8yyfg", "title": "Pulmonary hypertension treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RSMtgI8yyfg.mp4/RSMtgI8yyfg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RSMtgI8yyfg.mp4/RSMtgI8yyfg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RSMtgI8yyfg.m3u8/RSMtgI8yyfg.m3u8"}, "slug": "pulmonary-hypertension-treatment", "video_id": "RSMtgI8yyfg", "youtube_id": "RSMtgI8yyfg", "readable_id": "pulmonary-hypertension-treatment"}, "92aLiyeQj0w": {"duration": 502, "path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/measuring-angles-in-degrees/", "keywords": "geometry, degrees, angles", "id": "92aLiyeQj0w", "title": "Measuring angles in degrees", "description": "Let's come up with an exact way to measure an angle using a protractor. We'll also learn about acute angles. Not to be confused with augly angles :)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/92aLiyeQj0w.mp4/92aLiyeQj0w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/92aLiyeQj0w.mp4/92aLiyeQj0w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/92aLiyeQj0w.m3u8/92aLiyeQj0w.m3u8"}, "slug": "measuring-angles-in-degrees", "video_id": "92aLiyeQj0w", "youtube_id": "92aLiyeQj0w", "readable_id": "measuring-angles-in-degrees"}, "P0nMnPPdW_k": {"duration": 498, "path": "khan/science/biology/her/heredity-and-genetics/alleles-and-genes/", "keywords": "", "id": "P0nMnPPdW_k", "title": "Alleles and genes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P0nMnPPdW_k.mp4/P0nMnPPdW_k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P0nMnPPdW_k.mp4/P0nMnPPdW_k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P0nMnPPdW_k.m3u8/P0nMnPPdW_k.m3u8"}, "slug": "alleles-and-genes", "video_id": "P0nMnPPdW_k", "youtube_id": "P0nMnPPdW_k", "readable_id": "alleles-and-genes"}, "Vh70PyitQzo": {"duration": 186, "path": "khan/test-prep/mcat/physical-processes/thin-lenses/concave-lenses/", "keywords": "Concave, Lenses, Optics", "id": "Vh70PyitQzo", "title": "Concave lenses", "description": "Concave Lenses", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Vh70PyitQzo.mp4/Vh70PyitQzo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Vh70PyitQzo.mp4/Vh70PyitQzo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Vh70PyitQzo.m3u8/Vh70PyitQzo.m3u8"}, "slug": "concave-lenses", "video_id": "Vh70PyitQzo", "youtube_id": "Vh70PyitQzo", "readable_id": "concave-lenses"}, "VJgVdzicv_I": {"duration": 541, "path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/factional-reserve-accounting/simple-fractional-reserve-accounting-part-1/", "keywords": "Simple, Fractional, Reserve, Accounting, part, 1", "id": "VJgVdzicv_I", "title": "Simple fractional reserve accounting (part 1)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VJgVdzicv_I.mp4/VJgVdzicv_I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VJgVdzicv_I.mp4/VJgVdzicv_I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VJgVdzicv_I.m3u8/VJgVdzicv_I.m3u8"}, "slug": "simple-fractional-reserve-accounting-part-1", "video_id": "VJgVdzicv_I", "youtube_id": "VJgVdzicv_I", "readable_id": "simple-fractional-reserve-accounting-part-1"}, "HvYUKRMT0VI": {"duration": 624, "path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/thermodynamics-part-3/", "keywords": "physics, chemistry, thermodynamics, kelvin, temperature, ideal, gas, law", "id": "HvYUKRMT0VI", "title": "Thermodynamics part 3: Kelvin scale and Ideal gas law example", "description": "Sal makes the case for the Kelvin scale of temperature and absolute zero by showing that temperature is proportional to kinetic energy. Then he explains that you need to use the Kelvin scale in the ideal gas law. To finish he does a sample ideal gas law problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HvYUKRMT0VI.mp4/HvYUKRMT0VI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HvYUKRMT0VI.mp4/HvYUKRMT0VI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HvYUKRMT0VI.m3u8/HvYUKRMT0VI.m3u8"}, "slug": "thermodynamics-part-3", "video_id": "HvYUKRMT0VI", "youtube_id": "HvYUKRMT0VI", "readable_id": "thermodynamics-part-3"}, "8AkQvv-uceg": {"duration": 200, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-6-19/", "keywords": "", "id": "8AkQvv-uceg", "title": "19 True statements based on constraints", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8AkQvv-uceg.mp4/8AkQvv-uceg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8AkQvv-uceg.mp4/8AkQvv-uceg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8AkQvv-uceg.m3u8/8AkQvv-uceg.m3u8"}, "slug": "sat-2010-may-6-19", "video_id": "8AkQvv-uceg", "youtube_id": "8AkQvv-uceg", "readable_id": "sat-2010-may-6-19"}, "yX3JpmEgNHo": {"duration": 346, "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-4d/", "keywords": "AP, advanced, placement, calculus", "id": "yX3JpmEgNHo", "title": "2011 Calculus AB free response #4d", "description": "Mean Value Theorem and differentiability", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yX3JpmEgNHo.mp4/yX3JpmEgNHo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yX3JpmEgNHo.mp4/yX3JpmEgNHo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yX3JpmEgNHo.m3u8/yX3JpmEgNHo.m3u8"}, "slug": "2011-calculus-ab-free-response-4d", "video_id": "yX3JpmEgNHo", "youtube_id": "yX3JpmEgNHo", "readable_id": "2011-calculus-ab-free-response-4d"}, "tOuCdKqO6-s": {"duration": 844, "path": "khan/math/pre-algebra/exponents-radicals/negative-exponents-tutorial/zero-negative-and-fractional-exponents/", "keywords": "Zero, Negative, and, Fractional, Exponents, CC_39336_A-SSE_3_c", "id": "tOuCdKqO6-s", "title": "Zero, negative, and fractional exponents", "description": "Zero, Negative, and Fractional Exponents", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tOuCdKqO6-s.mp4/tOuCdKqO6-s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tOuCdKqO6-s.mp4/tOuCdKqO6-s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tOuCdKqO6-s.m3u8/tOuCdKqO6-s.m3u8"}, "slug": "zero-negative-and-fractional-exponents", "video_id": "tOuCdKqO6-s", "youtube_id": "tOuCdKqO6-s", "readable_id": "zero-negative-and-fractional-exponents"}, "Ad0aaYixFJg": {"duration": 748, "path": "khan/test-prep/mcat/chemical-processes/kinetics/experimental-determination-of-rate-laws/", "keywords": "", "id": "Ad0aaYixFJg", "title": "Experimental determination of rate laws", "description": "Example using initial rates to find the order in each reactant, the overall order, and the rate constant k.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ad0aaYixFJg.mp4/Ad0aaYixFJg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ad0aaYixFJg.mp4/Ad0aaYixFJg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ad0aaYixFJg.m3u8/Ad0aaYixFJg.m3u8"}, "slug": "experimental-determination-of-rate-laws", "video_id": "Ad0aaYixFJg", "youtube_id": "Ad0aaYixFJg", "readable_id": "experimental-determination-of-rate-laws"}, "N-mt2tiRJ7U": {"duration": 210, "path": "khan/humanities/art-1010/pop/oldenburg-floor-cake-1962/", "keywords": "Oldenburg, Cake, Smartistory, Art History, Pop Art", "id": "N-mt2tiRJ7U", "title": "Oldenburg, Floor Cake", "description": "Claes Oldenburg, Floor Cake, 1962, synthetic polymer paint and latex on canvas filled with foam rubber and cardboard boxes, 58.375 x 114.25 x 58.375 in. (148.2 x 290.2 x 148.2 cm) (MoMA) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N-mt2tiRJ7U.mp4/N-mt2tiRJ7U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N-mt2tiRJ7U.mp4/N-mt2tiRJ7U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N-mt2tiRJ7U.m3u8/N-mt2tiRJ7U.m3u8"}, "slug": "oldenburg-floor-cake-1962", "video_id": "N-mt2tiRJ7U", "youtube_id": "N-mt2tiRJ7U", "readable_id": "oldenburg-floor-cake-1962"}, "_SKmqh5Eu4Y": {"duration": 390, "path": "khan/partner-content/wi-phi/metaphys-epistemology/paradox-of-the-ravens/", "keywords": "Epistemology (Field Of Study),Philosophy (Field Of Study),Paradox (Quotation Subject),Raven Paradox,Khan Academy (Nonprofit Organization),Wiphi,Wireless Philosophy,University Of North Carolina At Chapel Hill (College/University),Marc Lange,Confirmation Bias (Quotation Subject),Explained,Evidence (Literature Subject),Western Philosophy (Field Of Study)", "id": "_SKmqh5Eu4Y", "title": "Epistemology: The Paradox of the Ravens", "description": "In this video, Marc Lange (UNC) introduces the paradox of confirmation, one that arises from instance confirmation, the equivalence condition, and common inference rules of logic.\n\nSpeaker: Dr. Marc Lange, Professor of Philosophy, University of North Carolina at Chapel Hill", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_SKmqh5Eu4Y.mp4/_SKmqh5Eu4Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_SKmqh5Eu4Y.mp4/_SKmqh5Eu4Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_SKmqh5Eu4Y.m3u8/_SKmqh5Eu4Y.m3u8"}, "slug": "paradox-of-the-ravens", "video_id": "_SKmqh5Eu4Y", "youtube_id": "_SKmqh5Eu4Y", "readable_id": "paradox-of-the-ravens"}, "zntNi3-ybfQ": {"duration": 1140, "path": "khan/math/linear-algebra/vectors_and_spaces/subspace_basis/linear-algebra-basis-of-a-subspace/", "keywords": "Linear, Algebra, Vectors, span, combination, basis, subspace", "id": "zntNi3-ybfQ", "title": "Basis of a subspace", "description": "Understanding the definition of a basis of a subspace", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zntNi3-ybfQ.mp4/zntNi3-ybfQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zntNi3-ybfQ.mp4/zntNi3-ybfQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zntNi3-ybfQ.m3u8/zntNi3-ybfQ.m3u8"}, "slug": "linear-algebra-basis-of-a-subspace", "video_id": "zntNi3-ybfQ", "youtube_id": "zntNi3-ybfQ", "readable_id": "linear-algebra-basis-of-a-subspace"}, "aAfMps_VyOY": {"duration": 588, "path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/housing-price-conundrum-part-3/", "keywords": "economics, housing, prices, lending, standards, appreciation, bubble", "id": "aAfMps_VyOY", "title": "Housing price conundrum (part 3)", "description": "Why did lending standards become more and more lax from 2000 to 2006?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aAfMps_VyOY.mp4/aAfMps_VyOY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aAfMps_VyOY.mp4/aAfMps_VyOY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aAfMps_VyOY.m3u8/aAfMps_VyOY.m3u8"}, "slug": "housing-price-conundrum-part-3", "video_id": "aAfMps_VyOY", "youtube_id": "aAfMps_VyOY", "readable_id": "housing-price-conundrum-part-3"}, "8a1a5A3CfdQ": {"duration": 338, "path": "khan/math/algebra/sequences/constructing-geometric-sequences/explicit-and-recursive-formulas-for-geometric-sequences/", "keywords": "education,online learning,learning,lessons", "id": "8a1a5A3CfdQ", "title": "How to find the explicit and the recursive formulas of a geometric sequence (example)", "description": "Sal finds an explicit formula of a geometric sequence given the first few terms of the sequences. Then he explores equivalent forms the explicit formula and finds the corresponding recursive formula.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8a1a5A3CfdQ.mp4/8a1a5A3CfdQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8a1a5A3CfdQ.mp4/8a1a5A3CfdQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8a1a5A3CfdQ.m3u8/8a1a5A3CfdQ.m3u8"}, "slug": "explicit-and-recursive-formulas-for-geometric-sequences", "video_id": "8a1a5A3CfdQ", "youtube_id": "8a1a5A3CfdQ", "readable_id": "explicit-and-recursive-formulas-for-geometric-sequences"}, "tp_qdvgXtVc": {"duration": 738, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/pulmonary-tb/", "keywords": "", "id": "tp_qdvgXtVc", "title": "Pulmonary TB", "description": "Learn the effects that TB has on the lungs and some important clinical clues.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tp_qdvgXtVc.mp4/tp_qdvgXtVc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tp_qdvgXtVc.mp4/tp_qdvgXtVc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tp_qdvgXtVc.m3u8/tp_qdvgXtVc.m3u8"}, "slug": "pulmonary-tb", "video_id": "tp_qdvgXtVc", "youtube_id": "tp_qdvgXtVc", "readable_id": "pulmonary-tb"}, "XmswXY1IoMk": {"duration": 38, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2009-may-3-01/", "keywords": "", "id": "XmswXY1IoMk", "title": "1 Student spending", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XmswXY1IoMk.mp4/XmswXY1IoMk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XmswXY1IoMk.mp4/XmswXY1IoMk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XmswXY1IoMk.m3u8/XmswXY1IoMk.m3u8"}, "slug": "sat-2009-may-3-01", "video_id": "XmswXY1IoMk", "youtube_id": "XmswXY1IoMk", "readable_id": "sat-2009-may-3-01"}, "axG9HuqViDY": {"duration": 512, "path": "khan/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/second-law-of-thermodynamics-and-entropy/", "keywords": "education,online learning,learning,lessons,Second Law Of Thermodynamics (Quotation Subject),entropy", "id": "axG9HuqViDY", "title": "Second Law of Thermodynamics and entropy", "description": "Second Law of Thermodynamics and entropy: the entropy of the universe constantly increases.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/axG9HuqViDY.mp4/axG9HuqViDY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/axG9HuqViDY.mp4/axG9HuqViDY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/axG9HuqViDY.m3u8/axG9HuqViDY.m3u8"}, "slug": "second-law-of-thermodynamics-and-entropy", "video_id": "axG9HuqViDY", "youtube_id": "axG9HuqViDY", "readable_id": "second-law-of-thermodynamics-and-entropy"}, "Se-ekDNhCDk": {"duration": 491, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/organic-chemistry-naming-examples-3/", "keywords": "Organic, Chemistry, Naming, Examples", "id": "Se-ekDNhCDk", "title": "Organic chemistry naming examples 3", "description": "Organic Chemistry Naming Examples 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Se-ekDNhCDk.mp4/Se-ekDNhCDk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Se-ekDNhCDk.mp4/Se-ekDNhCDk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Se-ekDNhCDk.m3u8/Se-ekDNhCDk.m3u8"}, "slug": "organic-chemistry-naming-examples-3", "video_id": "Se-ekDNhCDk", "youtube_id": "Se-ekDNhCDk", "readable_id": "organic-chemistry-naming-examples-3"}, "_60sKaoRmhU": {"duration": 1128, "path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals/introduction-to-the-line-integral/", "keywords": "line, integral, calculus", "id": "_60sKaoRmhU", "title": "Introduction to the line integral", "description": "Introduction to the Line Integral", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_60sKaoRmhU.mp4/_60sKaoRmhU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_60sKaoRmhU.mp4/_60sKaoRmhU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_60sKaoRmhU.m3u8/_60sKaoRmhU.m3u8"}, "slug": "introduction-to-the-line-integral", "video_id": "_60sKaoRmhU", "youtube_id": "_60sKaoRmhU", "readable_id": "introduction-to-the-line-integral"}, "nQ7QSV4JRSs": {"duration": 410, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties/alcohols/", "keywords": "naming, alcohols, organic, chemistry", "id": "nQ7QSV4JRSs", "title": "Alcohols", "description": "Naming alcohols", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nQ7QSV4JRSs.mp4/nQ7QSV4JRSs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nQ7QSV4JRSs.mp4/nQ7QSV4JRSs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nQ7QSV4JRSs.m3u8/nQ7QSV4JRSs.m3u8"}, "slug": "alcohols", "video_id": "nQ7QSV4JRSs", "youtube_id": "nQ7QSV4JRSs", "readable_id": "alcohols"}, "RD_Mh_SDz3s": {"duration": 259, "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/giorgione-three-philosophers/", "keywords": "", "id": "RD_Mh_SDz3s", "title": "Giorgione, Three Philosophers", "description": "Giorgione, Three Philosophers, c. 1506 (Kunsthistorisches Museum, Vienna) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RD_Mh_SDz3s.mp4/RD_Mh_SDz3s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RD_Mh_SDz3s.mp4/RD_Mh_SDz3s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RD_Mh_SDz3s.m3u8/RD_Mh_SDz3s.m3u8"}, "slug": "giorgione-three-philosophers", "video_id": "RD_Mh_SDz3s", "youtube_id": "RD_Mh_SDz3s", "readable_id": "giorgione-three-philosophers"}, "q7eF5Ci944U": {"duration": 417, "path": "khan/math/geometry/cc-geometry-circles/area-inscribed-triangle/perpendicular-radius-bisects-chord/", "keywords": "geometry", "id": "q7eF5Ci944U", "title": "Perpendicular radius bisects chord", "description": "Simple proof using RSH postulate to show that a radius perpendicular to a chord bisects it", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q7eF5Ci944U.mp4/q7eF5Ci944U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q7eF5Ci944U.mp4/q7eF5Ci944U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q7eF5Ci944U.m3u8/q7eF5Ci944U.m3u8"}, "slug": "perpendicular-radius-bisects-chord", "video_id": "q7eF5Ci944U", "youtube_id": "q7eF5Ci944U", "readable_id": "perpendicular-radius-bisects-chord"}, "TpQln9_i5t4": {"duration": 105, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q2-harder/", "keywords": "", "id": "TpQln9_i5t4", "title": "Percents \u2014 Harder example", "description": "Watch Sal work through a harder Percents problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TpQln9_i5t4.mp4/TpQln9_i5t4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TpQln9_i5t4.mp4/TpQln9_i5t4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TpQln9_i5t4.m3u8/TpQln9_i5t4.m3u8"}, "slug": "sat-math-q2-harder", "video_id": "TpQln9_i5t4", "youtube_id": "TpQln9_i5t4", "readable_id": "sat-math-q2-harder"}, "368K0iQv8nE": {"duration": 383, "path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/spitzer_telescope/", "keywords": "", "id": "368K0iQv8nE", "title": "Spitzer telescope", "description": "400 years of Astronomy using Telescopes. To commemorate this International Year of Astronomy, three of NASA's flagship observatories have put a new spin on how we see the Pinwheel Galaxy!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/368K0iQv8nE.mp4/368K0iQv8nE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/368K0iQv8nE.mp4/368K0iQv8nE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/368K0iQv8nE.m3u8/368K0iQv8nE.m3u8"}, "slug": "spitzer_telescope", "video_id": "368K0iQv8nE", "youtube_id": "368K0iQv8nE", "readable_id": "spitzer_telescope"}, "uzvopM4PZLw": {"duration": 273, "path": "khan/math/pre-algebra/factors-multiples/prime_factorization/the-fundamental-theorem-of-arithmetic/", "keywords": "fundamental, theorem, of, arithmetic", "id": "uzvopM4PZLw", "title": "The fundamental theorem of arithmetic", "description": "Ben Eater and Sal walk through the \"Fundamental theorem of arithmetic\" module: http://www.khanacademy.org/math/arithmetic/factors-multiples/e/the_fundamental_theorem_of_arithmetic", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uzvopM4PZLw.mp4/uzvopM4PZLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uzvopM4PZLw.mp4/uzvopM4PZLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uzvopM4PZLw.m3u8/uzvopM4PZLw.m3u8"}, "slug": "the-fundamental-theorem-of-arithmetic", "video_id": "uzvopM4PZLw", "youtube_id": "uzvopM4PZLw", "readable_id": "the-fundamental-theorem-of-arithmetic"}, "_0TqG8-N8DI": {"duration": 561, "path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/oxidation-of-aldehydes-using-tollens-reagent/", "keywords": "", "id": "_0TqG8-N8DI", "title": "Oxidation of aldehydes using Tollens' reagent", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_0TqG8-N8DI.mp4/_0TqG8-N8DI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_0TqG8-N8DI.mp4/_0TqG8-N8DI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_0TqG8-N8DI.m3u8/_0TqG8-N8DI.m3u8"}, "slug": "oxidation-of-aldehydes-using-tollens-reagent", "video_id": "_0TqG8-N8DI", "youtube_id": "_0TqG8-N8DI", "readable_id": "oxidation-of-aldehydes-using-tollens-reagent"}, "qD6ct0VS15c": {"duration": 242, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/titian-venus-of-urbino-1538/", "keywords": "Art History, Renaissance, Venice, Venetian Art, Khan Academy, Tiziano, Nude, Titian, Venus, Urbino, smarthistory, Google Art Project, OER, Uffizi", "id": "qD6ct0VS15c", "title": "Titian, Venus of Urbino", "description": "Titian, Venus of Urbino, 1538, oil on canvas, 119.20 x 165.50 cm (Galleria degli Uffizi, Florence)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qD6ct0VS15c.mp4/qD6ct0VS15c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qD6ct0VS15c.mp4/qD6ct0VS15c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qD6ct0VS15c.m3u8/qD6ct0VS15c.m3u8"}, "slug": "titian-venus-of-urbino-1538", "video_id": "qD6ct0VS15c", "youtube_id": "qD6ct0VS15c", "readable_id": "titian-venus-of-urbino-1538"}, "Iya-2bS14ho": {"duration": 293, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/thermoregulation-in-the-lungs/", "keywords": "MCAT", "id": "Iya-2bS14ho", "title": "Thermoregulation in the lungs", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Iya-2bS14ho.mp4/Iya-2bS14ho.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Iya-2bS14ho.mp4/Iya-2bS14ho.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Iya-2bS14ho.m3u8/Iya-2bS14ho.m3u8"}, "slug": "thermoregulation-in-the-lungs", "video_id": "Iya-2bS14ho", "youtube_id": "Iya-2bS14ho", "readable_id": "thermoregulation-in-the-lungs"}, "2oKVTTHA5u0": {"duration": 322, "path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/managing-autism-spectrum-disorder/", "keywords": "Spectrum Disorder,Autistic Spectrum Disorders (Disease Or Medical Condition),Autism (Disease Or Medical Condition),Mental Illness (Disease Or Medical Condition),Health (Industry)", "id": "2oKVTTHA5u0", "title": "Managing autism spectrum disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2oKVTTHA5u0.mp4/2oKVTTHA5u0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2oKVTTHA5u0.mp4/2oKVTTHA5u0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2oKVTTHA5u0.m3u8/2oKVTTHA5u0.m3u8"}, "slug": "managing-autism-spectrum-disorder", "video_id": "2oKVTTHA5u0", "youtube_id": "2oKVTTHA5u0", "readable_id": "managing-autism-spectrum-disorder"}, "hKkBlcnU9pw": {"duration": 247, "path": "khan/math/pre-algebra/negatives-absolute-value-pre-alg/abs-value-pre-alg/comparing-absolute-values/", "keywords": "finance, education, absolute, values", "id": "hKkBlcnU9pw", "title": "Comparing absolute values", "description": "When we compare numbers we use the concepts of greater than (>), less than (<), and equal to (=). The same is true of absolute values.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hKkBlcnU9pw.mp4/hKkBlcnU9pw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hKkBlcnU9pw.mp4/hKkBlcnU9pw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hKkBlcnU9pw.m3u8/hKkBlcnU9pw.m3u8"}, "slug": "comparing-absolute-values", "video_id": "hKkBlcnU9pw", "youtube_id": "hKkBlcnU9pw", "readable_id": "comparing-absolute-values"}, "I-uzVCJCRpE": {"duration": 554, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/beta-lactam-antibiotics/", "keywords": "", "id": "I-uzVCJCRpE", "title": "Beta-lactam antibiotics", "description": "The mechanism of action of beta-lactam antibiotics", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I-uzVCJCRpE.mp4/I-uzVCJCRpE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I-uzVCJCRpE.mp4/I-uzVCJCRpE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I-uzVCJCRpE.m3u8/I-uzVCJCRpE.m3u8"}, "slug": "beta-lactam-antibiotics", "video_id": "I-uzVCJCRpE", "youtube_id": "I-uzVCJCRpE", "readable_id": "beta-lactam-antibiotics"}, "QnWQezGy1Tc": {"duration": 58, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/14-apparel-manufacturers/", "keywords": "", "id": "QnWQezGy1Tc", "title": "14 Apparel manufacturers", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QnWQezGy1Tc.mp4/QnWQezGy1Tc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QnWQezGy1Tc.mp4/QnWQezGy1Tc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QnWQezGy1Tc.m3u8/QnWQezGy1Tc.m3u8"}, "slug": "14-apparel-manufacturers", "video_id": "QnWQezGy1Tc", "youtube_id": "QnWQezGy1Tc", "readable_id": "14-apparel-manufacturers"}, "GZ1ogxruLJM": {"duration": 589, "path": "khan/math/trigonometry/basic-trigonometry/trig-application-problems/figuring-out-coordinate-of-bended-figure-using-trig/", "keywords": "", "id": "GZ1ogxruLJM", "title": "Figuring out coordinate of bended figure using trig", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GZ1ogxruLJM.mp4/GZ1ogxruLJM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GZ1ogxruLJM.mp4/GZ1ogxruLJM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GZ1ogxruLJM.m3u8/GZ1ogxruLJM.m3u8"}, "slug": "figuring-out-coordinate-of-bended-figure-using-trig", "video_id": "GZ1ogxruLJM", "youtube_id": "GZ1ogxruLJM", "readable_id": "figuring-out-coordinate-of-bended-figure-using-trig"}, "kJIqoTw_Og8": {"duration": 226, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/comparing_linear_functions/comparing-features-of-functions-6/", "keywords": "", "id": "kJIqoTw_Og8", "title": "Comparing linear functions word problems 3", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kJIqoTw_Og8.mp4/kJIqoTw_Og8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kJIqoTw_Og8.mp4/kJIqoTw_Og8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kJIqoTw_Og8.m3u8/kJIqoTw_Og8.m3u8"}, "slug": "comparing-features-of-functions-6", "video_id": "kJIqoTw_Og8", "youtube_id": "kJIqoTw_Og8", "readable_id": "comparing-features-of-functions-6"}, "03yq7XsErqo": {"duration": 69, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials/evaluating-a-polynomial-at-a-given-value/", "keywords": "u11_l2_t1_we2, Evaluating, polynomial, at, given, value, CC_39336_A-REI_4", "id": "03yq7XsErqo", "title": "Evaluating a polynomial at a given value", "description": "Evaluate 3x^2-8x+7 when x=-2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/03yq7XsErqo.mp4/03yq7XsErqo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/03yq7XsErqo.mp4/03yq7XsErqo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/03yq7XsErqo.m3u8/03yq7XsErqo.m3u8"}, "slug": "evaluating-a-polynomial-at-a-given-value", "video_id": "03yq7XsErqo", "youtube_id": "03yq7XsErqo", "readable_id": "evaluating-a-polynomial-at-a-given-value"}, "c9LwwQK5588": {"duration": 358, "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/types-of-diabetes/", "keywords": "", "id": "c9LwwQK5588", "title": "Types of diabetes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/c9LwwQK5588.mp4/c9LwwQK5588.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/c9LwwQK5588.mp4/c9LwwQK5588.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/c9LwwQK5588.m3u8/c9LwwQK5588.m3u8"}, "slug": "types-of-diabetes", "video_id": "c9LwwQK5588", "youtube_id": "c9LwwQK5588", "readable_id": "types-of-diabetes"}, "KzZF1lP4Rbk": {"duration": 322, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/phidias-parthenon-frieze-c-438-32-b-c-e/", "keywords": "parthenon, elgin marbles, british museum, art history, history of art, frieze, pan-athenaic procession, athens", "id": "KzZF1lP4Rbk", "title": "Parthenon frieze", "description": "Phidias(?), Parthenon Frieze, c. 438-32 B.C.E., pentelic marble, Classical Period (420 linear feet of the 525 that complete the frieze are in the British Museum). \n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KzZF1lP4Rbk.mp4/KzZF1lP4Rbk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KzZF1lP4Rbk.mp4/KzZF1lP4Rbk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KzZF1lP4Rbk.m3u8/KzZF1lP4Rbk.m3u8"}, "slug": "phidias-parthenon-frieze-c-438-32-b-c-e", "video_id": "KzZF1lP4Rbk", "youtube_id": "KzZF1lP4Rbk", "readable_id": "phidias-parthenon-frieze-c-438-32-b-c-e"}, "Ma9YxZiBiRU": {"duration": 587, "path": "khan/science/health-and-medicine/infectious-diseases/influenza/flu-vaccine-efficacy/", "keywords": "", "id": "Ma9YxZiBiRU", "title": "Flu vaccine efficacy", "description": "Find out just how useful the flu vaccine actually is at preventing the flu! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ma9YxZiBiRU.mp4/Ma9YxZiBiRU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ma9YxZiBiRU.mp4/Ma9YxZiBiRU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ma9YxZiBiRU.m3u8/Ma9YxZiBiRU.m3u8"}, "slug": "flu-vaccine-efficacy", "video_id": "Ma9YxZiBiRU", "youtube_id": "Ma9YxZiBiRU", "readable_id": "flu-vaccine-efficacy"}, "uL3grek6D54": {"duration": 466, "path": "khan/test-prep/mcat/behavior/psychological-disorders/biological-basis-of-parkinsons-disease/", "keywords": "", "id": "uL3grek6D54", "title": "Biological basis of parkinson's disease", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uL3grek6D54.mp4/uL3grek6D54.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uL3grek6D54.mp4/uL3grek6D54.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uL3grek6D54.m3u8/uL3grek6D54.m3u8"}, "slug": "biological-basis-of-parkinsons-disease", "video_id": "uL3grek6D54", "youtube_id": "uL3grek6D54", "readable_id": "biological-basis-of-parkinsons-disease"}, "ourH3ueWNmA": {"duration": 180, "path": "khan/math/early-math/cc-early-math-place-value-topic/cc-early-math-teens/teens-and-ten/", "keywords": "", "id": "ourH3ueWNmA", "title": "Teens as sums with 10", "description": "Let's count together from 0 to 19. Then, let's look at the \"1\" in each teen number and think about what it really means. (This video is an introduction to the idea of a tens place.)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ourH3ueWNmA.mp4/ourH3ueWNmA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ourH3ueWNmA.mp4/ourH3ueWNmA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ourH3ueWNmA.m3u8/ourH3ueWNmA.m3u8"}, "slug": "teens-and-ten", "video_id": "ourH3ueWNmA", "youtube_id": "ourH3ueWNmA", "readable_id": "teens-and-ten"}, "1Y39f7MAL5I": {"duration": 117, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-14/", "keywords": "", "id": "1Y39f7MAL5I", "title": "14 Running distance ratio", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1Y39f7MAL5I.mp4/1Y39f7MAL5I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1Y39f7MAL5I.mp4/1Y39f7MAL5I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1Y39f7MAL5I.m3u8/1Y39f7MAL5I.m3u8"}, "slug": "sat-2010-may-6-14", "video_id": "1Y39f7MAL5I", "youtube_id": "1Y39f7MAL5I", "readable_id": "sat-2010-may-6-14"}, "Z-gq3nV2mmM": {"duration": 64, "path": "khan/science/discoveries-projects/discovery-lab-2012/khan-dl-week-2-philip-and-miles/", "keywords": "", "id": "Z-gq3nV2mmM", "title": "DLab: Students present their computer science project", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z-gq3nV2mmM.mp4/Z-gq3nV2mmM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z-gq3nV2mmM.mp4/Z-gq3nV2mmM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z-gq3nV2mmM.m3u8/Z-gq3nV2mmM.m3u8"}, "slug": "khan-dl-week-2-philip-and-miles", "video_id": "Z-gq3nV2mmM", "youtube_id": "Z-gq3nV2mmM", "readable_id": "khan-dl-week-2-philip-and-miles"}, "bYgL6ovZE64": {"duration": 47, "path": "khan/college-admissions/get-started/importance-of-college/ss-college-offers-exposure-to-diversity/", "keywords": "", "id": "bYgL6ovZE64", "title": "Student story: College offers exposure to diversity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bYgL6ovZE64.mp4/bYgL6ovZE64.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bYgL6ovZE64.mp4/bYgL6ovZE64.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bYgL6ovZE64.m3u8/bYgL6ovZE64.m3u8"}, "slug": "ss-college-offers-exposure-to-diversity", "video_id": "bYgL6ovZE64", "youtube_id": "bYgL6ovZE64", "readable_id": "ss-college-offers-exposure-to-diversity"}, "6bsWW4Ke_Hs": {"duration": 475, "path": "khan/test-prep/ap-art-history/africa-ap/sika-dwa-kofi-golden-stool/", "keywords": "Asanti,Sika dwa kofi,Golden Stool,Gold Coast,Ghana (Country),Asante,Africa (Continent),African art,art,stool", "id": "6bsWW4Ke_Hs", "title": "Sika dwa kofi (Golden Stool), Asante people", "description": "Sika dwa kofi (Golden Stool), Asante people (Ghana), c. 1700 and Asante gold weights (University of Pennsylvania Museum of Archaeology and Anthropology)\nSpeakers: Dr. Peri Klemm and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6bsWW4Ke_Hs.mp4/6bsWW4Ke_Hs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6bsWW4Ke_Hs.mp4/6bsWW4Ke_Hs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6bsWW4Ke_Hs.m3u8/6bsWW4Ke_Hs.m3u8"}, "slug": "sika-dwa-kofi-golden-stool", "video_id": "6bsWW4Ke_Hs", "youtube_id": "6bsWW4Ke_Hs", "readable_id": "sika-dwa-kofi-golden-stool"}, "n9UvuzI2fq0": {"duration": 419, "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-5a/", "keywords": "ap, advanced, placement, exam", "id": "n9UvuzI2fq0", "title": "2011 Calculus AB free response #5a", "description": "Using a tangent line to extrapolate a function from a known initial condition", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n9UvuzI2fq0.mp4/n9UvuzI2fq0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n9UvuzI2fq0.mp4/n9UvuzI2fq0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n9UvuzI2fq0.m3u8/n9UvuzI2fq0.m3u8"}, "slug": "2011-calculus-ab-free-response-5a", "video_id": "n9UvuzI2fq0", "youtube_id": "n9UvuzI2fq0", "readable_id": "2011-calculus-ab-free-response-5a"}, "C7ducZoLKgw": {"duration": 483, "path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/fundamental-theorem-of-calculus/", "keywords": "", "id": "C7ducZoLKgw", "title": "Fundamental theorem of calculus", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C7ducZoLKgw.mp4/C7ducZoLKgw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C7ducZoLKgw.mp4/C7ducZoLKgw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C7ducZoLKgw.m3u8/C7ducZoLKgw.m3u8"}, "slug": "fundamental-theorem-of-calculus", "video_id": "C7ducZoLKgw", "youtube_id": "C7ducZoLKgw", "readable_id": "fundamental-theorem-of-calculus"}, "WbyODj_OiZU": {"duration": 300, "path": "khan/math/differential-calculus/derivative_applications/differentiation-application/modeling-a-forgetting-curve/", "keywords": "", "id": "WbyODj_OiZU", "title": "Modeling a forgetting curve", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WbyODj_OiZU.mp4/WbyODj_OiZU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WbyODj_OiZU.mp4/WbyODj_OiZU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WbyODj_OiZU.m3u8/WbyODj_OiZU.m3u8"}, "slug": "modeling-a-forgetting-curve", "video_id": "WbyODj_OiZU", "youtube_id": "WbyODj_OiZU", "readable_id": "modeling-a-forgetting-curve"}, "C5-lz0hcqsE": {"duration": 720, "path": "khan/math/differential-equations/first-order-differential-equations/separable-equations/separable-differential-equations/", "keywords": "separable, differential, equations", "id": "C5-lz0hcqsE", "title": "Old separable differential equations introduction", "description": "Introduction to separable differential equations.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C5-lz0hcqsE.mp4/C5-lz0hcqsE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C5-lz0hcqsE.mp4/C5-lz0hcqsE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C5-lz0hcqsE.m3u8/C5-lz0hcqsE.m3u8"}, "slug": "separable-differential-equations", "video_id": "C5-lz0hcqsE", "youtube_id": "C5-lz0hcqsE", "readable_id": "separable-differential-equations"}, "EnwWxMZVBeg": {"duration": 651, "path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/introduction-to-radians/", "keywords": "radians, degrees", "id": "EnwWxMZVBeg", "title": "Introduction to radians", "description": "Understanding the definition and motivation for radians and the relationship between radians and degrees", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EnwWxMZVBeg.mp4/EnwWxMZVBeg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EnwWxMZVBeg.mp4/EnwWxMZVBeg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EnwWxMZVBeg.m3u8/EnwWxMZVBeg.m3u8"}, "slug": "introduction-to-radians", "video_id": "EnwWxMZVBeg", "youtube_id": "EnwWxMZVBeg", "readable_id": "introduction-to-radians"}, "o1IFePaNENQ": {"duration": 610, "path": "khan/humanities/history/euro-hist/ww1-aftermath/paris-peace-conference-and-treaty-of-versailles/", "keywords": "", "id": "o1IFePaNENQ", "title": "Paris Peace Conference and Treaty of Versailles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o1IFePaNENQ.mp4/o1IFePaNENQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o1IFePaNENQ.mp4/o1IFePaNENQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o1IFePaNENQ.m3u8/o1IFePaNENQ.m3u8"}, "slug": "paris-peace-conference-and-treaty-of-versailles", "video_id": "o1IFePaNENQ", "youtube_id": "o1IFePaNENQ", "readable_id": "paris-peace-conference-and-treaty-of-versailles"}, "KSrnZMAfwTM": {"duration": 218, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/number-patterns/math-patterns-example-1/", "keywords": "", "id": "KSrnZMAfwTM", "title": "Math patterns example 1", "description": "Part of our exploration of math is learning to identify patterns among numbers. Can you see the pattern in this example?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KSrnZMAfwTM.mp4/KSrnZMAfwTM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KSrnZMAfwTM.mp4/KSrnZMAfwTM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KSrnZMAfwTM.m3u8/KSrnZMAfwTM.m3u8"}, "slug": "math-patterns-example-1", "video_id": "KSrnZMAfwTM", "youtube_id": "KSrnZMAfwTM", "readable_id": "math-patterns-example-1"}, "vmS3cTaxKdA": {"duration": 155, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/generalizing-disc-method-around-x-axis/", "keywords": "", "id": "vmS3cTaxKdA", "title": "Generalizing disc method around x-axis", "description": "Generalizing what we did in the last video for f(x) to get the \"formula\" for using the disc method around the x-axis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vmS3cTaxKdA.mp4/vmS3cTaxKdA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vmS3cTaxKdA.mp4/vmS3cTaxKdA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vmS3cTaxKdA.m3u8/vmS3cTaxKdA.m3u8"}, "slug": "generalizing-disc-method-around-x-axis", "video_id": "vmS3cTaxKdA", "youtube_id": "vmS3cTaxKdA", "readable_id": "generalizing-disc-method-around-x-axis"}, "145zOBT0LD4": {"duration": 306, "path": "khan/math/algebra2/systems_eq_ineq/fancier_systems_precalc/solutions-to-three-variable-system-2/", "keywords": "u14, l3, t1, we4, Solutions, to, Three, Variable, System", "id": "145zOBT0LD4", "title": "Solutions to three variable system 2", "description": "u14 l3 t1 we4 Solutions to Three Variable System", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/145zOBT0LD4.mp4/145zOBT0LD4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/145zOBT0LD4.mp4/145zOBT0LD4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/145zOBT0LD4.m3u8/145zOBT0LD4.m3u8"}, "slug": "solutions-to-three-variable-system-2", "video_id": "145zOBT0LD4", "youtube_id": "145zOBT0LD4", "readable_id": "solutions-to-three-variable-system-2"}, "ltdN7LnWJPY": {"duration": 154, "path": "khan/humanities/becoming-modern/symbolism/ephemeral/", "keywords": "costume, fashion, gemstones, metal, nature, ornate, North America", "id": "ltdN7LnWJPY", "title": "Tiffany, Hair Ornament", "description": "Met curator Alice Cooney Frelinghuysen on transience in Louis Comfort Tiffany\u2019s Hair Ornament, c. 1904.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit\u00a0Find an Educator Resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ltdN7LnWJPY.mp4/ltdN7LnWJPY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ltdN7LnWJPY.mp4/ltdN7LnWJPY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ltdN7LnWJPY.m3u8/ltdN7LnWJPY.m3u8"}, "slug": "ephemeral", "video_id": "ltdN7LnWJPY", "youtube_id": "ltdN7LnWJPY", "readable_id": "ephemeral"}, "Mboz5JIIwSU": {"duration": 40, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-6-3/", "keywords": "", "id": "Mboz5JIIwSU", "title": "3 Value of 2 variable expression", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mboz5JIIwSU.mp4/Mboz5JIIwSU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mboz5JIIwSU.mp4/Mboz5JIIwSU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mboz5JIIwSU.m3u8/Mboz5JIIwSU.m3u8"}, "slug": "sat-2010-may-6-3", "video_id": "Mboz5JIIwSU", "youtube_id": "Mboz5JIIwSU", "readable_id": "sat-2010-may-6-3"}, "UYShebe44Xs": {"duration": 345, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/externalities-topic/taxes-for-factoring-in-negative-externalities/", "keywords": "microeconomics", "id": "UYShebe44Xs", "title": "Taxes for factoring in negative externalities", "description": "How to factor in negative externalities through taxation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UYShebe44Xs.mp4/UYShebe44Xs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UYShebe44Xs.mp4/UYShebe44Xs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UYShebe44Xs.m3u8/UYShebe44Xs.m3u8"}, "slug": "taxes-for-factoring-in-negative-externalities", "video_id": "UYShebe44Xs", "youtube_id": "UYShebe44Xs", "readable_id": "taxes-for-factoring-in-negative-externalities"}, "ojFuf9RYmzI": {"duration": 521, "path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/coefficient-in-binomial-expansion/", "keywords": "", "id": "ojFuf9RYmzI", "title": "Determining coefficient in binomial expansion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ojFuf9RYmzI.mp4/ojFuf9RYmzI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ojFuf9RYmzI.mp4/ojFuf9RYmzI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ojFuf9RYmzI.m3u8/ojFuf9RYmzI.m3u8"}, "slug": "coefficient-in-binomial-expansion", "video_id": "ojFuf9RYmzI", "youtube_id": "ojFuf9RYmzI", "readable_id": "coefficient-in-binomial-expansion"}, "wgnJevkTEdw": {"duration": 44, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-13-inflation-rate/", "keywords": "", "id": "wgnJevkTEdw", "title": "13 Inflation rate", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wgnJevkTEdw.mp4/wgnJevkTEdw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wgnJevkTEdw.mp4/wgnJevkTEdw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wgnJevkTEdw.m3u8/wgnJevkTEdw.m3u8"}, "slug": "sat-13-inflation-rate", "video_id": "wgnJevkTEdw", "youtube_id": "wgnJevkTEdw", "readable_id": "sat-13-inflation-rate"}, "-1KeL9wVfOY": {"duration": 270, "path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/terpenes-to-steroid2/", "keywords": "terpene, steroid, squalene, cholesterol", "id": "-1KeL9wVfOY", "title": "From terpenes to steroids part 2: Squalene, cholesterol, and steroids", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-1KeL9wVfOY.mp4/-1KeL9wVfOY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-1KeL9wVfOY.mp4/-1KeL9wVfOY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-1KeL9wVfOY.m3u8/-1KeL9wVfOY.m3u8"}, "slug": "terpenes-to-steroid2", "video_id": "-1KeL9wVfOY", "youtube_id": "-1KeL9wVfOY", "readable_id": "terpenes-to-steroid2"}, "aNeCGxJVG7w": {"duration": 202, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-number-mult-div-pre-alg/dividing-mixed-numbers-and-fractions/", "keywords": "U02_L2_T3_we4, Dividing, Mixed, Numbers, and, Fractions, CC_5_NF_7, CC_6_NS_1", "id": "aNeCGxJVG7w", "title": "Dividing mixed numbers and fractions", "description": "Dividing Mixed Numbers and Fractions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aNeCGxJVG7w.mp4/aNeCGxJVG7w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aNeCGxJVG7w.mp4/aNeCGxJVG7w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aNeCGxJVG7w.m3u8/aNeCGxJVG7w.m3u8"}, "slug": "dividing-mixed-numbers-and-fractions", "video_id": "aNeCGxJVG7w", "youtube_id": "aNeCGxJVG7w", "readable_id": "dividing-mixed-numbers-and-fractions"}, "5LqNm9d2__I": {"duration": 195, "path": "khan/partner-content/wi-phi/critical-thinking/necessary-sufficient-conditions/", "keywords": "", "id": "5LqNm9d2__I", "title": "Fundamentals: Necessary and Sufficient Conditions", "description": "In this video, Kelley discusses one of the most basic tools in the philosophers' tool kit: the distinction between necessary and sufficient conditions. Through the use of ordinary language glosses and plenty of examples this mighty distinction is brought down to earth and presented in a ready-to-use fashion.\n\nSpeaker:\u00a0Kelly Schiffman", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5LqNm9d2__I.mp4/5LqNm9d2__I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5LqNm9d2__I.mp4/5LqNm9d2__I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5LqNm9d2__I.m3u8/5LqNm9d2__I.m3u8"}, "slug": "necessary-sufficient-conditions", "video_id": "5LqNm9d2__I", "youtube_id": "5LqNm9d2__I", "readable_id": "necessary-sufficient-conditions"}, "-YEtWOxweRg": {"duration": 464, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders/what-is-primary-myelofibrosis/", "keywords": "", "id": "-YEtWOxweRg", "title": "What is primary myelofibrosis?", "description": "Learn what is primary myelofibrosis as well as how to identify its signs and symptoms, diagnose it, and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-YEtWOxweRg.mp4/-YEtWOxweRg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-YEtWOxweRg.mp4/-YEtWOxweRg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-YEtWOxweRg.m3u8/-YEtWOxweRg.m3u8"}, "slug": "what-is-primary-myelofibrosis", "video_id": "-YEtWOxweRg", "youtube_id": "-YEtWOxweRg", "readable_id": "what-is-primary-myelofibrosis"}, "upO6Mh862PI": {"duration": 534, "path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/ap-calculus-bc-exams-2008-1-a/", "keywords": "calculus, BC, exam", "id": "upO6Mh862PI", "title": "AP Calculus BC exams: 2008 1 a", "description": "Part 1a of the 2008 BC free response", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/upO6Mh862PI.mp4/upO6Mh862PI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/upO6Mh862PI.mp4/upO6Mh862PI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/upO6Mh862PI.m3u8/upO6Mh862PI.m3u8"}, "slug": "ap-calculus-bc-exams-2008-1-a", "video_id": "upO6Mh862PI", "youtube_id": "upO6Mh862PI", "readable_id": "ap-calculus-bc-exams-2008-1-a"}, "aOeKj-w-3fY": {"duration": 868, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/robert-storr-gerhard-richter-the-cage-paintings/", "keywords": "Gerhard, Richter, Robert Storr, Painting, Cage, Cage Paintings", "id": "aOeKj-w-3fY", "title": "Gerhard Richter, The Cage Paintings (1-6)", "description": "Robert Storr talks about Gerhard Richter's Cage paintings.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aOeKj-w-3fY.mp4/aOeKj-w-3fY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aOeKj-w-3fY.mp4/aOeKj-w-3fY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aOeKj-w-3fY.m3u8/aOeKj-w-3fY.m3u8"}, "slug": "robert-storr-gerhard-richter-the-cage-paintings", "video_id": "aOeKj-w-3fY", "youtube_id": "aOeKj-w-3fY", "readable_id": "robert-storr-gerhard-richter-the-cage-paintings"}, "3m-464MqBJY": {"duration": 482, "path": "khan/test-prep/mcat/processing-the-environment/sight/vision-summary/", "keywords": "vision", "id": "3m-464MqBJY", "title": "Visual sensory information", "description": "In this video, I explore our sense of vision. By Ronald Sahyouni.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3m-464MqBJY.mp4/3m-464MqBJY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3m-464MqBJY.mp4/3m-464MqBJY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3m-464MqBJY.m3u8/3m-464MqBJY.m3u8"}, "slug": "vision-summary", "video_id": "3m-464MqBJY", "youtube_id": "3m-464MqBJY", "readable_id": "vision-summary"}, "-z2yk8yxv08": {"duration": 419, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/curly-arrow-conventions/", "keywords": "", "id": "-z2yk8yxv08", "title": "Curly arrow conventions in organic chemistry", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-z2yk8yxv08.mp4/-z2yk8yxv08.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-z2yk8yxv08.mp4/-z2yk8yxv08.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-z2yk8yxv08.m3u8/-z2yk8yxv08.m3u8"}, "slug": "curly-arrow-conventions", "video_id": "-z2yk8yxv08", "youtube_id": "-z2yk8yxv08", "readable_id": "curly-arrow-conventions"}, "mi5cWPjhJ2c": {"duration": 55, "path": "khan/science/discoveries-projects/discoveries/magnetic-fields/increase-strength-of-magnet/", "keywords": "permability", "id": "mi5cWPjhJ2c", "title": "Increase strength of magnet", "description": "How can we increase the strength of a bar magnet using a piece of steel? Why is it stronger?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mi5cWPjhJ2c.mp4/mi5cWPjhJ2c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mi5cWPjhJ2c.mp4/mi5cWPjhJ2c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mi5cWPjhJ2c.m3u8/mi5cWPjhJ2c.m3u8"}, "slug": "increase-strength-of-magnet", "video_id": "mi5cWPjhJ2c", "youtube_id": "mi5cWPjhJ2c", "readable_id": "increase-strength-of-magnet"}, "MtwvLru62Qw": {"duration": 798, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-sal/e2-e1-sn2-sn1-reactions-example-3/", "keywords": "E2, E1, Sn2, Sn1, Reactions, Example", "id": "MtwvLru62Qw", "title": "E2 E1 Sn2 Sn1 reactions example 3", "description": "E2 E1 Sn2 Sn1 Reactions Example 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MtwvLru62Qw.mp4/MtwvLru62Qw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MtwvLru62Qw.mp4/MtwvLru62Qw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MtwvLru62Qw.m3u8/MtwvLru62Qw.m3u8"}, "slug": "e2-e1-sn2-sn1-reactions-example-3", "video_id": "MtwvLru62Qw", "youtube_id": "MtwvLru62Qw", "readable_id": "e2-e1-sn2-sn1-reactions-example-3"}, "fbwW9mHFcgk": {"duration": 324, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/rubens-arrival-or-disembarkation-of-marie-de-medici-at-marseilles-1621-25/", "keywords": "Rubens, Marie de Medici, Smarthistory, Art History, Louvre", "id": "fbwW9mHFcgk", "title": "Rubens, Arrival (or Disembarkation) of Marie de Medici at Marseilles, Medici Cycle", "description": "Peter Paul Rubens, Arrival (or Disembarkation) of Marie de Medici at Marseilles,1621-25, oil on canvas, 394 x 295 cm (Mus\u00e9e du Louvre, Paris) Speakers: Drs. Beth Harris and Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fbwW9mHFcgk.mp4/fbwW9mHFcgk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fbwW9mHFcgk.mp4/fbwW9mHFcgk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fbwW9mHFcgk.m3u8/fbwW9mHFcgk.m3u8"}, "slug": "rubens-arrival-or-disembarkation-of-marie-de-medici-at-marseilles-1621-25", "video_id": "fbwW9mHFcgk", "youtube_id": "fbwW9mHFcgk", "readable_id": "rubens-arrival-or-disembarkation-of-marie-de-medici-at-marseilles-1621-25"}, "sZG-zHkGR4U": {"duration": 197, "path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/work-as-the-transfer-of-energy/", "keywords": "", "id": "sZG-zHkGR4U", "title": "Work as the transfer of energy", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sZG-zHkGR4U.mp4/sZG-zHkGR4U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sZG-zHkGR4U.mp4/sZG-zHkGR4U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sZG-zHkGR4U.m3u8/sZG-zHkGR4U.m3u8"}, "slug": "work-as-the-transfer-of-energy", "video_id": "sZG-zHkGR4U", "youtube_id": "sZG-zHkGR4U", "readable_id": "work-as-the-transfer-of-energy"}, "AaR1mPrdbTc": {"duration": 452, "path": "khan/economics-finance-domain/macroeconomics/inflation-topic/cost-of-living-tutorial/introduction-to-inflation/", "keywords": "macroeconomics, CPI", "id": "AaR1mPrdbTc", "title": "Introduction to inflation", "description": "Basics of price inflation and the CPI (consumer price index)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AaR1mPrdbTc.mp4/AaR1mPrdbTc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AaR1mPrdbTc.mp4/AaR1mPrdbTc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AaR1mPrdbTc.m3u8/AaR1mPrdbTc.m3u8"}, "slug": "introduction-to-inflation", "video_id": "AaR1mPrdbTc", "youtube_id": "AaR1mPrdbTc", "readable_id": "introduction-to-inflation"}, "tVNRn4srPUI": {"duration": 329, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/chronic-disease-vs-iron-deficiency-anemia/", "keywords": "", "id": "tVNRn4srPUI", "title": "Chronic disease vs iron deficiency anemia", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tVNRn4srPUI.mp4/tVNRn4srPUI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tVNRn4srPUI.mp4/tVNRn4srPUI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tVNRn4srPUI.m3u8/tVNRn4srPUI.m3u8"}, "slug": "chronic-disease-vs-iron-deficiency-anemia", "video_id": "tVNRn4srPUI", "youtube_id": "tVNRn4srPUI", "readable_id": "chronic-disease-vs-iron-deficiency-anemia"}, "ir-ISPDjGno": {"duration": 548, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/r-greater-but-less-inequality/", "keywords": "", "id": "ir-ISPDjGno", "title": "Return on capital and economic growth", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ir-ISPDjGno.mp4/ir-ISPDjGno.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ir-ISPDjGno.mp4/ir-ISPDjGno.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ir-ISPDjGno.m3u8/ir-ISPDjGno.m3u8"}, "slug": "r-greater-but-less-inequality", "video_id": "ir-ISPDjGno", "youtube_id": "ir-ISPDjGno", "readable_id": "r-greater-but-less-inequality"}, "vSiu8qzHV6c": {"duration": 213, "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-painting-technique-rothko/", "keywords": "", "id": "vSiu8qzHV6c", "title": "The Painting Techniques of Mark Rothko", "description": "Explore the complex veils of color that form Mark Rothko's abstract paintings. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vSiu8qzHV6c.mp4/vSiu8qzHV6c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vSiu8qzHV6c.mp4/vSiu8qzHV6c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vSiu8qzHV6c.m3u8/vSiu8qzHV6c.m3u8"}, "slug": "moma-painting-technique-rothko", "video_id": "vSiu8qzHV6c", "youtube_id": "vSiu8qzHV6c", "readable_id": "moma-painting-technique-rothko"}, "vAYoAH98Gag": {"duration": 269, "path": "khan/science/organic-chemistry/organic-structures/acid-base-review/stabilization-of-a-conjugate-base-solvation/", "keywords": "", "id": "vAYoAH98Gag", "title": "Stabilization of a conjugate base: solvation", "description": "How the solvent affects the stability of a conjugate base", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vAYoAH98Gag.mp4/vAYoAH98Gag.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vAYoAH98Gag.mp4/vAYoAH98Gag.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vAYoAH98Gag.m3u8/vAYoAH98Gag.m3u8"}, "slug": "stabilization-of-a-conjugate-base-solvation", "video_id": "vAYoAH98Gag", "youtube_id": "vAYoAH98Gag", "readable_id": "stabilization-of-a-conjugate-base-solvation"}, "LzkL0Iik2B8": {"duration": 222, "path": "khan/partner-content/pixar/modeling-character/subdivision-averages/charactermodeling5/", "keywords": "", "id": "LzkL0Iik2B8", "title": "1. Weighted average of three points", "description": "First we'll review weighted averages of two points and extend the idea to three points.\nClick here to practice weighted averages of two points if you haven't seen it before.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LzkL0Iik2B8.mp4/LzkL0Iik2B8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LzkL0Iik2B8.mp4/LzkL0Iik2B8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LzkL0Iik2B8.m3u8/LzkL0Iik2B8.m3u8"}, "slug": "charactermodeling5", "video_id": "LzkL0Iik2B8", "youtube_id": "LzkL0Iik2B8", "readable_id": "charactermodeling5"}, "osIFa9zcI-w": {"duration": 203, "path": "khan/math/early-math/cc-early-math-add-sub-20/cc-early-math-word-problems-more-fewer-20/comparison-word-problems/", "keywords": "", "id": "osIFa9zcI-w", "title": "Comparison word problems", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/osIFa9zcI-w.mp4/osIFa9zcI-w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/osIFa9zcI-w.mp4/osIFa9zcI-w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/osIFa9zcI-w.m3u8/osIFa9zcI-w.m3u8"}, "slug": "comparison-word-problems", "video_id": "osIFa9zcI-w", "youtube_id": "osIFa9zcI-w", "readable_id": "comparison-word-problems"}, "FXG056WcAxY": {"duration": 195, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/ocean-acidification/ocean-acidification-build/", "keywords": "Climate Change (Website Category),chemistry,experiment,diffusion,science,classroom,activity,hands on,NGSS,Environmental Science (Field Of Study),global warming,Ocean Acidification,How-to (Website Category)", "id": "FXG056WcAxY", "title": "Set up your experiment: Tools, materials, and assembly", "description": "In this video, Lori Lambertson of the Exploratorium Teacher Institute takes us step by step through everything you'll need to do the Ocean Acidification in a Cup experiment yourself.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FXG056WcAxY.mp4/FXG056WcAxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FXG056WcAxY.mp4/FXG056WcAxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FXG056WcAxY.m3u8/FXG056WcAxY.m3u8"}, "slug": "ocean-acidification-build", "video_id": "FXG056WcAxY", "youtube_id": "FXG056WcAxY", "readable_id": "ocean-acidification-build"}, "-y90WYn8nzk": {"duration": 163, "path": "khan/humanities/art-history-for-teachers/course-materials/using-smarthistory/", "keywords": "", "id": "-y90WYn8nzk", "title": "Art history (Smarthistory) on Khanacademy.org", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-y90WYn8nzk.mp4/-y90WYn8nzk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-y90WYn8nzk.mp4/-y90WYn8nzk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-y90WYn8nzk.m3u8/-y90WYn8nzk.m3u8"}, "slug": "using-smarthistory", "video_id": "-y90WYn8nzk", "youtube_id": "-y90WYn8nzk", "readable_id": "using-smarthistory"}, "-yfjQGg-aMA": {"duration": 200, "path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/veneziano-saint-lucy-altarpiece-1445-47/", "keywords": "art history, Sacra Conversazione, smarthistory, Uffizi, Art History Gabriele Veneziano", "id": "-yfjQGg-aMA", "title": "Veneziano, St. Lucy Altarpiece", "description": "Domenico Veneziano, Saint Lucy Altarpiece, 1445-47, tempera on wood panel, 82 1/4 x 85\" or 209 x 216 cm (Galleria degli Uffizi, Florence) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-yfjQGg-aMA.mp4/-yfjQGg-aMA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-yfjQGg-aMA.mp4/-yfjQGg-aMA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-yfjQGg-aMA.m3u8/-yfjQGg-aMA.m3u8"}, "slug": "veneziano-saint-lucy-altarpiece-1445-47", "video_id": "-yfjQGg-aMA", "youtube_id": "-yfjQGg-aMA", "readable_id": "veneziano-saint-lucy-altarpiece-1445-47"}, "ETzUpoqZIHY": {"duration": 441, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial/parallax-in-observing-stars/", "keywords": "Parallax, in, Observing, Stars", "id": "ETzUpoqZIHY", "title": "Parallax in observing stars", "description": "Parallax in Observing Stars", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ETzUpoqZIHY.mp4/ETzUpoqZIHY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ETzUpoqZIHY.mp4/ETzUpoqZIHY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ETzUpoqZIHY.m3u8/ETzUpoqZIHY.m3u8"}, "slug": "parallax-in-observing-stars", "video_id": "ETzUpoqZIHY", "youtube_id": "ETzUpoqZIHY", "readable_id": "parallax-in-observing-stars"}, "-8cCBEFlOyw": {"duration": 344, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-neonatal-herpes/", "keywords": "", "id": "-8cCBEFlOyw", "title": "What is neonatal herpes?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-8cCBEFlOyw.mp4/-8cCBEFlOyw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-8cCBEFlOyw.mp4/-8cCBEFlOyw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-8cCBEFlOyw.m3u8/-8cCBEFlOyw.m3u8"}, "slug": "what-is-neonatal-herpes", "video_id": "-8cCBEFlOyw", "youtube_id": "-8cCBEFlOyw", "readable_id": "what-is-neonatal-herpes"}, "-VQf_hJOEvM": {"duration": 458, "path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/constructing-linear-and-exponential-functions-from-graph/", "keywords": "", "id": "-VQf_hJOEvM", "title": "How to construct linear and basic exponential functions from their graphs (example)", "description": "Sal constructs a linear function of the form f(x)=mx+b and an exponential function of the form g(x)=a*r^x, given the graphs of those functions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-VQf_hJOEvM.mp4/-VQf_hJOEvM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-VQf_hJOEvM.mp4/-VQf_hJOEvM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-VQf_hJOEvM.m3u8/-VQf_hJOEvM.m3u8"}, "slug": "constructing-linear-and-exponential-functions-from-graph", "video_id": "-VQf_hJOEvM", "youtube_id": "-VQf_hJOEvM", "readable_id": "constructing-linear-and-exponential-functions-from-graph"}, "uGpLS_pr7oc": {"duration": 731, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/life-insurance/term-and-whole-life-insurance-policies/", "keywords": "personal, finance", "id": "uGpLS_pr7oc", "title": "Term and whole life insurance policies", "description": "Overview of the difference between term and whole life insurance policies", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uGpLS_pr7oc.mp4/uGpLS_pr7oc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uGpLS_pr7oc.mp4/uGpLS_pr7oc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uGpLS_pr7oc.m3u8/uGpLS_pr7oc.m3u8"}, "slug": "term-and-whole-life-insurance-policies", "video_id": "uGpLS_pr7oc", "youtube_id": "uGpLS_pr7oc", "readable_id": "term-and-whole-life-insurance-policies"}, "XzYNh2wpO0A": {"duration": 75, "path": "khan/math/algebra/two-variable-linear-inequalities/checking-solutions-of-inequalities/testing-solutions-for-a-system-of-inequalities/", "keywords": "u14_l1_t2_we2, Testing, Solutions, for, System, of, Inequalities, CC_39336_A-CED_3, CC_39336_A-REI_12", "id": "XzYNh2wpO0A", "title": "How to check a solution of a system of inequalities (example)", "description": "Sal checks whether the ordered pair (2,5) is a solution of the following system: y\u22652x+1 and x>1.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XzYNh2wpO0A.mp4/XzYNh2wpO0A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XzYNh2wpO0A.mp4/XzYNh2wpO0A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XzYNh2wpO0A.m3u8/XzYNh2wpO0A.m3u8"}, "slug": "testing-solutions-for-a-system-of-inequalities", "video_id": "XzYNh2wpO0A", "youtube_id": "XzYNh2wpO0A", "readable_id": "testing-solutions-for-a-system-of-inequalities"}, "FaF3v-ezbSk": {"duration": 594, "path": "khan/test-prep/mcat/physical-processes/vectors-and-scalars/unit-vector-notation/", "keywords": "unit, vector, physics, calculus, vectors", "id": "FaF3v-ezbSk", "title": "Unit vector notation", "description": "Expressing a vector as the scaled sum of unit vectors", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FaF3v-ezbSk.mp4/FaF3v-ezbSk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FaF3v-ezbSk.mp4/FaF3v-ezbSk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FaF3v-ezbSk.m3u8/FaF3v-ezbSk.m3u8"}, "slug": "unit-vector-notation", "video_id": "FaF3v-ezbSk", "youtube_id": "FaF3v-ezbSk", "readable_id": "unit-vector-notation"}, "x6xtezhuCZ4": {"duration": 306, "path": "khan/math/pre-algebra/fractions-pre-alg/multiplying-fractions-pre-alg/multiplying-a-fraction-by-a-fraction/", "keywords": "", "id": "x6xtezhuCZ4", "title": "Multiplying two fractions: an explanation", "description": "This video will help you think about what it means to multiply two fractions. By drawing the problem and \"seeing\" the answer, you'll better understand how we arrived at it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x6xtezhuCZ4.mp4/x6xtezhuCZ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x6xtezhuCZ4.mp4/x6xtezhuCZ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x6xtezhuCZ4.m3u8/x6xtezhuCZ4.m3u8"}, "slug": "multiplying-a-fraction-by-a-fraction", "video_id": "x6xtezhuCZ4", "youtube_id": "x6xtezhuCZ4", "readable_id": "multiplying-a-fraction-by-a-fraction"}, "SEzDiejb1a0": {"duration": 553, "path": "khan/humanities/ancient-art-civilizations/roman/wall-painting/villa-of-mysteries/", "keywords": "", "id": "SEzDiejb1a0", "title": "Dionysiac frieze, Villa of Mysteries, Pompeii", "description": "Dionysian Cult Cycle (?), Villa of Mysteries, before 79 C.E., fresco, Pompeii, Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SEzDiejb1a0.mp4/SEzDiejb1a0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SEzDiejb1a0.mp4/SEzDiejb1a0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SEzDiejb1a0.m3u8/SEzDiejb1a0.m3u8"}, "slug": "villa-of-mysteries", "video_id": "SEzDiejb1a0", "youtube_id": "SEzDiejb1a0", "readable_id": "villa-of-mysteries"}, "AbUkraQIYv8": {"duration": 349, "path": "khan/humanities/becoming-modern/intro-becoming-modern/where-are-the-women/", "keywords": "Tate", "id": "AbUkraQIYv8", "title": "Unlock Art: Where are the Women?", "description": "This video brought to you by Tate.org.uk\n\nBy calling attention to identity, sexuality, politics, and history, women artists have dominated the art debates for the last several decades. Despite this, only a small percentage of gallery collections and displays belong to women artists, even today. So how do we go about talking about women in art history? Learn more about the changing role of female artists in a male dominated art world over the centuries. Join Jemima Kirke as she guides us through a history of women in art, exploring the ways in which they have been represented, underrepresented, and sometimes misrepresented.\nShould there exist a separate Women\u2019s Art History to tell this story, or is it simply a matter of inserting women into existing narratives? What about removing the label altogether, and referring to women artists as just artists? Would this ignore an important component of identity or recognise that women and men can be artists in equal measure?\u00a0How can women artists be sufficiently recognised without distancing them from art history as we know it?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AbUkraQIYv8.mp4/AbUkraQIYv8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AbUkraQIYv8.mp4/AbUkraQIYv8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AbUkraQIYv8.m3u8/AbUkraQIYv8.m3u8"}, "slug": "where-are-the-women", "video_id": "AbUkraQIYv8", "youtube_id": "AbUkraQIYv8", "readable_id": "where-are-the-women"}, "6kUUJJV_MNA": {"duration": 444, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/donatello-david-bronze-c-1440s/", "keywords": "donatello, david, florence, bargello, italian renaissance, renaissance, Goliath, contrapposto, art, history, art history, history of art, Milan, Florentine Republic, Medici, Palazzo Medici, lost wax casting, nude", "id": "6kUUJJV_MNA", "title": "Donatello, David", "description": "Donatello, David, bronze, late 1420s to the 1460s, likely the 1440s (Museo Nazionale del Bargello, Florence)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6kUUJJV_MNA.mp4/6kUUJJV_MNA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6kUUJJV_MNA.mp4/6kUUJJV_MNA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6kUUJJV_MNA.m3u8/6kUUJJV_MNA.m3u8"}, "slug": "donatello-david-bronze-c-1440s", "video_id": "6kUUJJV_MNA", "youtube_id": "6kUUJJV_MNA", "readable_id": "donatello-david-bronze-c-1440s"}, "xGiILI906C4": {"duration": 550, "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex3-part-2-evaluating-the-outside-surface/", "keywords": "surface, integral, calculus", "id": "xGiILI906C4", "title": "Surface integral ex3 part 2: Evaluating the outside surface", "description": "Evaluating the surface integral over the outside of the chopped cylinder", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xGiILI906C4.mp4/xGiILI906C4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xGiILI906C4.mp4/xGiILI906C4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xGiILI906C4.m3u8/xGiILI906C4.m3u8"}, "slug": "surface-integral-ex3-part-2-evaluating-the-outside-surface", "video_id": "xGiILI906C4", "youtube_id": "xGiILI906C4", "readable_id": "surface-integral-ex3-part-2-evaluating-the-outside-surface"}, "-Zlq5tNl94M": {"duration": 259, "path": "khan/math/early-math/cc-early-math-place-value-topic/cc-early-math-tens/rep-quantity-with-digits/", "keywords": "", "id": "-Zlq5tNl94M", "title": "Place value example with 42", "description": "Learn to see 42 as 4 tens and 2 ones.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-Zlq5tNl94M.mp4/-Zlq5tNl94M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-Zlq5tNl94M.mp4/-Zlq5tNl94M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-Zlq5tNl94M.m3u8/-Zlq5tNl94M.m3u8"}, "slug": "rep-quantity-with-digits", "video_id": "-Zlq5tNl94M", "youtube_id": "-Zlq5tNl94M", "readable_id": "rep-quantity-with-digits"}, "qTGJMnTWrrw": {"duration": 498, "path": "khan/humanities/renaissance-reformation/protestant-reformation1/protestant-reformation-1/", "keywords": "history, Protestant Reformation, Martin Luther", "id": "qTGJMnTWrrw", "title": "Introduction to the Protestant Reformation: Setting the stage (part 1)", "description": "Speakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qTGJMnTWrrw.mp4/qTGJMnTWrrw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qTGJMnTWrrw.mp4/qTGJMnTWrrw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qTGJMnTWrrw.m3u8/qTGJMnTWrrw.m3u8"}, "slug": "protestant-reformation-1", "video_id": "qTGJMnTWrrw", "youtube_id": "qTGJMnTWrrw", "readable_id": "protestant-reformation-1"}, "H3tg4bH5JuY": {"duration": 802, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/personal-bankruptcy-tut/personal-bankruptcy-chapters-7-and-13/", "keywords": "bankruptcy, 22, personal", "id": "H3tg4bH5JuY", "title": "Personal bankruptcy: Chapters 7 and 13", "description": "Chapter 7 and Chapter 13 personal bankruptcy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H3tg4bH5JuY.mp4/H3tg4bH5JuY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H3tg4bH5JuY.mp4/H3tg4bH5JuY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H3tg4bH5JuY.m3u8/H3tg4bH5JuY.m3u8"}, "slug": "personal-bankruptcy-chapters-7-and-13", "video_id": "H3tg4bH5JuY", "youtube_id": "H3tg4bH5JuY", "readable_id": "personal-bankruptcy-chapters-7-and-13"}, "ft5gJbqdzfY": {"duration": 123, "path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-may-9-2013-spring-break-over-commanding-resumes/", "keywords": "", "id": "ft5gJbqdzfY", "title": "'Spring Break' over: commanding resumes", "description": "Curiosity gets new software and new capabilities for the long trek to Mt. Sharp.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ft5gJbqdzfY.mp4/ft5gJbqdzfY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ft5gJbqdzfY.mp4/ft5gJbqdzfY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ft5gJbqdzfY.m3u8/ft5gJbqdzfY.m3u8"}, "slug": "curiosity-rover-report-may-9-2013-spring-break-over-commanding-resumes", "video_id": "ft5gJbqdzfY", "youtube_id": "ft5gJbqdzfY", "readable_id": "curiosity-rover-report-may-9-2013-spring-break-over-commanding-resumes"}, "SbpoyXTpC84": {"duration": 462, "path": "khan/math/precalculus/prob_comb/combinations/permutations-and-combinations-3/", "keywords": "U12_L2_T3_we3, Permutations, and, Combinations", "id": "SbpoyXTpC84", "title": "Example: 9 card hands", "description": "Thinking about how many ways we can construct a hand of 9 cards", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SbpoyXTpC84.mp4/SbpoyXTpC84.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SbpoyXTpC84.mp4/SbpoyXTpC84.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SbpoyXTpC84.m3u8/SbpoyXTpC84.m3u8"}, "slug": "permutations-and-combinations-3", "video_id": "SbpoyXTpC84", "youtube_id": "SbpoyXTpC84", "readable_id": "permutations-and-combinations-3"}, "K5rmfHlHy20": {"duration": 154, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-subtract-100/adding-two-digit-numbers-without-regrouping/", "keywords": "", "id": "K5rmfHlHy20", "title": "Adding two-digit numbers without regrouping (example 2)", "description": "Learn to add 23 + 45 thinking about place value.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K5rmfHlHy20.mp4/K5rmfHlHy20.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K5rmfHlHy20.mp4/K5rmfHlHy20.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K5rmfHlHy20.m3u8/K5rmfHlHy20.m3u8"}, "slug": "adding-two-digit-numbers-without-regrouping", "video_id": "K5rmfHlHy20", "youtube_id": "K5rmfHlHy20", "readable_id": "adding-two-digit-numbers-without-regrouping"}, "8U8egQjcPaI": {"duration": 672, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/rent-control-dead-weight-cost/", "keywords": "", "id": "8U8egQjcPaI", "title": "Rent control and deadweight loss", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8U8egQjcPaI.mp4/8U8egQjcPaI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8U8egQjcPaI.mp4/8U8egQjcPaI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8U8egQjcPaI.m3u8/8U8egQjcPaI.m3u8"}, "slug": "rent-control-dead-weight-cost", "video_id": "8U8egQjcPaI", "youtube_id": "8U8egQjcPaI", "readable_id": "rent-control-dead-weight-cost"}, "5WEX0J8hEHM": {"duration": 143, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p14-harder/", "keywords": "", "id": "5WEX0J8hEHM", "title": "Isolating quantities \u2014 Harder example", "description": "Watch Sal work through a harder Isolating quantities problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5WEX0J8hEHM.mp4/5WEX0J8hEHM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5WEX0J8hEHM.mp4/5WEX0J8hEHM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5WEX0J8hEHM.m3u8/5WEX0J8hEHM.m3u8"}, "slug": "sat-math-p14-harder", "video_id": "5WEX0J8hEHM", "youtube_id": "5WEX0J8hEHM", "readable_id": "sat-math-p14-harder"}, "Id2E72P8Fe0": {"duration": 703, "path": "khan/test-prep/mcat/chemical-processes/bioenergetics/insulin-and-glucagon/", "keywords": "", "id": "Id2E72P8Fe0", "title": "Insulin and glucagon", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Id2E72P8Fe0.mp4/Id2E72P8Fe0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Id2E72P8Fe0.mp4/Id2E72P8Fe0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Id2E72P8Fe0.m3u8/Id2E72P8Fe0.m3u8"}, "slug": "insulin-and-glucagon", "video_id": "Id2E72P8Fe0", "youtube_id": "Id2E72P8Fe0", "readable_id": "insulin-and-glucagon"}, "MKErxh58RME": {"duration": 284, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/comparing_linear_functions/comparing-features-of-functions-2/", "keywords": "", "id": "MKErxh58RME", "title": "Comparing linear functions word problems 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MKErxh58RME.mp4/MKErxh58RME.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MKErxh58RME.mp4/MKErxh58RME.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MKErxh58RME.m3u8/MKErxh58RME.m3u8"}, "slug": "comparing-features-of-functions-2", "video_id": "MKErxh58RME", "youtube_id": "MKErxh58RME", "readable_id": "comparing-features-of-functions-2"}, "dtQyiDMoub4": {"duration": 159, "path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/arc-length-from-angle-measure/", "keywords": "", "id": "dtQyiDMoub4", "title": "Finding arc length from radian angle measure", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dtQyiDMoub4.mp4/dtQyiDMoub4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dtQyiDMoub4.mp4/dtQyiDMoub4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dtQyiDMoub4.m3u8/dtQyiDMoub4.m3u8"}, "slug": "arc-length-from-angle-measure", "video_id": "dtQyiDMoub4", "youtube_id": "dtQyiDMoub4", "readable_id": "arc-length-from-angle-measure"}, "4kbv2Gaw-9U": {"duration": 370, "path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/gentile-adoration/", "keywords": "", "id": "4kbv2Gaw-9U", "title": "Gentile da Fabriano, Adoration of the Magi", "description": "Gentile da Fabriano, Adoration of the Magi, 1423, tempera on panel, 283 x 300 cm (Uffizi Gallery, Florence)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4kbv2Gaw-9U.mp4/4kbv2Gaw-9U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4kbv2Gaw-9U.mp4/4kbv2Gaw-9U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4kbv2Gaw-9U.m3u8/4kbv2Gaw-9U.m3u8"}, "slug": "gentile-adoration", "video_id": "4kbv2Gaw-9U", "youtube_id": "4kbv2Gaw-9U", "readable_id": "gentile-adoration"}, "naRUWPvsQbQ": {"duration": 493, "path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/rectangular-and-trapezoidal-riemann-approximations/", "keywords": "", "id": "naRUWPvsQbQ", "title": "Rectangular and trapezoidal Riemann approximations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/naRUWPvsQbQ.mp4/naRUWPvsQbQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/naRUWPvsQbQ.mp4/naRUWPvsQbQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/naRUWPvsQbQ.m3u8/naRUWPvsQbQ.m3u8"}, "slug": "rectangular-and-trapezoidal-riemann-approximations", "video_id": "naRUWPvsQbQ", "youtube_id": "naRUWPvsQbQ", "readable_id": "rectangular-and-trapezoidal-riemann-approximations"}, "BD2avz0161k": {"duration": 322, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-20/", "keywords": "", "id": "BD2avz0161k", "title": "20 Units digits of products", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BD2avz0161k.mp4/BD2avz0161k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BD2avz0161k.mp4/BD2avz0161k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BD2avz0161k.m3u8/BD2avz0161k.m3u8"}, "slug": "sat-getting-ready-2-20", "video_id": "BD2avz0161k", "youtube_id": "BD2avz0161k", "readable_id": "sat-getting-ready-2-20"}, "PDKPsHuz80k": {"duration": 366, "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-hardware/sscc-blended-hardwareinfrastructure/", "keywords": "", "id": "PDKPsHuz80k", "title": "Putting the right hardware and infrastructure in place", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PDKPsHuz80k.mp4/PDKPsHuz80k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PDKPsHuz80k.mp4/PDKPsHuz80k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PDKPsHuz80k.m3u8/PDKPsHuz80k.m3u8"}, "slug": "sscc-blended-hardwareinfrastructure", "video_id": "PDKPsHuz80k", "youtube_id": "PDKPsHuz80k", "readable_id": "sscc-blended-hardwareinfrastructure"}, "f1eP2m01PCQ": {"duration": 94, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/ocean-acidification/ocean-acidification-intro/", "keywords": "Climate Change (Website Category),Chemistry (Field Of Study),experiment,ocean acidification,science,diffusion,Carbon Dioxide (Chemical Compound),atmosphere,environment,classroom,activity,teaching,NGSS", "id": "f1eP2m01PCQ", "title": "Introduction: This simple experiment illustrates ocean acidification ... in a cup!", "description": "Human activity is having an enormous impact on our natural environment, including making our oceans more acidic. This hands-on science snack, Ocean Acidification in a Cup, models the chemical process that's occurring around us and helps you understand some of the mechanisms and impacts related to climate change.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/f1eP2m01PCQ.mp4/f1eP2m01PCQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/f1eP2m01PCQ.mp4/f1eP2m01PCQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/f1eP2m01PCQ.m3u8/f1eP2m01PCQ.m3u8"}, "slug": "ocean-acidification-intro", "video_id": "f1eP2m01PCQ", "youtube_id": "f1eP2m01PCQ", "readable_id": "ocean-acidification-intro"}, "5YEGpb7tXOo": {"duration": 145, "path": "khan/humanities/art-islam/islamic-art-late-period/two-portraits/", "keywords": "", "id": "5YEGpb7tXOo", "title": "Two portraits, two views", "description": "Sheila Canby, curator of the exhibition Shah Abbas the remaking of Iran, discusses two very different portraits of Shah 'Abbas giving an insight into his character.\u00a0\u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5YEGpb7tXOo.mp4/5YEGpb7tXOo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5YEGpb7tXOo.mp4/5YEGpb7tXOo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5YEGpb7tXOo.m3u8/5YEGpb7tXOo.m3u8"}, "slug": "two-portraits", "video_id": "5YEGpb7tXOo", "youtube_id": "5YEGpb7tXOo", "readable_id": "two-portraits"}, "vflZuk-_Hz4": {"duration": 375, "path": "khan/partner-content/wi-phi/critical-thinking/abductive-arguments/", "keywords": "", "id": "vflZuk-_Hz4", "title": "Fundamentals: Abductive Arguments", "description": "In this video, Geoff Pynn follows up on his introduction to critical thinking by exploring how abductive arguments give us reason to believe their conclusions. Good abductive arguments don't guarantee their conclusions, but give us very good reasons to believe their conclusions. This sort of inference is called \"inference to the best explanation.\"\n\nSpeaker: Dr. Geoff Pynn, Assistant Professor, Northern Illinois University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vflZuk-_Hz4.mp4/vflZuk-_Hz4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vflZuk-_Hz4.mp4/vflZuk-_Hz4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vflZuk-_Hz4.m3u8/vflZuk-_Hz4.m3u8"}, "slug": "abductive-arguments", "video_id": "vflZuk-_Hz4", "youtube_id": "vflZuk-_Hz4", "readable_id": "abductive-arguments"}, "DRtLXagrMHw": {"duration": 427, "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/cosmos-time-scale-tutorial/cosmological-time-scale-1/", "keywords": "Cosmological, Time, Scale", "id": "DRtLXagrMHw", "title": "Cosmological time scale 1", "description": "Cosmological Time Scale 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DRtLXagrMHw.mp4/DRtLXagrMHw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DRtLXagrMHw.mp4/DRtLXagrMHw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DRtLXagrMHw.m3u8/DRtLXagrMHw.m3u8"}, "slug": "cosmological-time-scale-1", "video_id": "DRtLXagrMHw", "youtube_id": "DRtLXagrMHw", "readable_id": "cosmological-time-scale-1"}, "lD7BHl5W86Q": {"duration": 368, "path": "khan/humanities/global-culture/conceptual-performance/xu-bing/", "keywords": "", "id": "lD7BHl5W86Q", "title": "An installation by Xu Bing at the British Museum", "description": "Discover the secrets behind this shadow-and-light box installation by contemporary artist Xu Bing, inspired by a Chinese painting in the Museum's collection. Xu Bing's installation at the British Museum is 5 meters tall and is made using materials such as hemp fibers, dry plants, corn husks, crumpled paper and debris sourced from sites across London.\u00a0\u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lD7BHl5W86Q.mp4/lD7BHl5W86Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lD7BHl5W86Q.mp4/lD7BHl5W86Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lD7BHl5W86Q.m3u8/lD7BHl5W86Q.m3u8"}, "slug": "xu-bing", "video_id": "lD7BHl5W86Q", "youtube_id": "lD7BHl5W86Q", "readable_id": "xu-bing"}, "T9Nw66RCMhg": {"duration": 205, "path": "khan/science/biology/her/tree-of-life/human-prehistory-101-part-2-weathering-the-storm/", "keywords": "genetics, dna, testing, kit, genome, test, prehistory, ancestry, genomics", "id": "T9Nw66RCMhg", "title": "Human prehistory 101 part 2: Weathering the storm", "description": "Third in a series of videos that introduces human prehistory, this video describes how early humans continued to defy the odds and populated the Americas during the last ice age.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T9Nw66RCMhg.mp4/T9Nw66RCMhg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T9Nw66RCMhg.mp4/T9Nw66RCMhg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T9Nw66RCMhg.m3u8/T9Nw66RCMhg.m3u8"}, "slug": "human-prehistory-101-part-2-weathering-the-storm", "video_id": "T9Nw66RCMhg", "youtube_id": "T9Nw66RCMhg", "readable_id": "human-prehistory-101-part-2-weathering-the-storm"}, "z-SU7P-gIoQ": {"duration": 452, "path": "khan/math/precalculus/precalc-matrices/properties-matrix-multiplication/commutative-property-matrix-multiplication/", "keywords": "", "id": "z-SU7P-gIoQ", "title": "Is matrix multiplication commutative", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z-SU7P-gIoQ.mp4/z-SU7P-gIoQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z-SU7P-gIoQ.mp4/z-SU7P-gIoQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z-SU7P-gIoQ.m3u8/z-SU7P-gIoQ.m3u8"}, "slug": "commutative-property-matrix-multiplication", "video_id": "z-SU7P-gIoQ", "youtube_id": "z-SU7P-gIoQ", "readable_id": "commutative-property-matrix-multiplication"}, "ND-Bbp_q46s": {"duration": 410, "path": "khan/math/algebra2/functions-and-graphs/new_operators/new-operator-definitions/", "keywords": "algebra, operators, function, SAT", "id": "ND-Bbp_q46s", "title": "New operator definitions", "description": "Getting comfortable with evaluating newly defined function operators", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ND-Bbp_q46s.mp4/ND-Bbp_q46s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ND-Bbp_q46s.mp4/ND-Bbp_q46s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ND-Bbp_q46s.m3u8/ND-Bbp_q46s.m3u8"}, "slug": "new-operator-definitions", "video_id": "ND-Bbp_q46s", "youtube_id": "ND-Bbp_q46s", "readable_id": "new-operator-definitions"}, "tC1SfxRvtmM": {"duration": 75, "path": "khan/math/algebra/introduction-to-algebra/variable-and-expressions/evaluate-a-formula-using-substitution/", "keywords": "u10_l1_t4_we1, Evaluate, formula, using, substitution, CC_6_EE_2_c, CC_6_EE_6, CC_6_EE_9, CC_7_EE_4, CC_8_EE_7, CC_8_EE_7_a, CC_39336_A-CED_1", "id": "tC1SfxRvtmM", "title": "How to evaluate an expression using substitution", "description": "In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tC1SfxRvtmM.mp4/tC1SfxRvtmM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tC1SfxRvtmM.mp4/tC1SfxRvtmM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tC1SfxRvtmM.m3u8/tC1SfxRvtmM.m3u8"}, "slug": "evaluate-a-formula-using-substitution", "video_id": "tC1SfxRvtmM", "youtube_id": "tC1SfxRvtmM", "readable_id": "evaluate-a-formula-using-substitution"}, "SjY5UytlTTs": {"duration": 487, "path": "khan/math/precalculus/vectors-precalc/magnitude-direction/mag-dir-vec-sums-2/", "keywords": "", "id": "SjY5UytlTTs", "title": "Magnitude and direction of vector sums", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SjY5UytlTTs.mp4/SjY5UytlTTs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SjY5UytlTTs.mp4/SjY5UytlTTs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SjY5UytlTTs.m3u8/SjY5UytlTTs.m3u8"}, "slug": "mag-dir-vec-sums-2", "video_id": "SjY5UytlTTs", "youtube_id": "SjY5UytlTTs", "readable_id": "mag-dir-vec-sums-2"}, "xdarp2VBwNk": {"duration": 543, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/concentration-cell-edited/", "keywords": "", "id": "xdarp2VBwNk", "title": "Concentration cell", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xdarp2VBwNk.mp4/xdarp2VBwNk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xdarp2VBwNk.mp4/xdarp2VBwNk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xdarp2VBwNk.m3u8/xdarp2VBwNk.m3u8"}, "slug": "concentration-cell-edited", "video_id": "xdarp2VBwNk", "youtube_id": "xdarp2VBwNk", "readable_id": "concentration-cell-edited"}, "497oIjqRPco": {"duration": 173, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/algebra-foundations-computing-scientific-notation/multiplying-and-dividing-in-scientific-notation/", "keywords": "", "id": "497oIjqRPco", "title": "Multiplying and dividing in scientific notation (example)", "description": "Learn how to simplify a multiplication and division expression using scientific notation. The expression in this problem is (7 * 10^5) / ((2 * 10^-2)(2.5 * 10^9)).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/497oIjqRPco.mp4/497oIjqRPco.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/497oIjqRPco.mp4/497oIjqRPco.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/497oIjqRPco.m3u8/497oIjqRPco.m3u8"}, "slug": "multiplying-and-dividing-in-scientific-notation", "video_id": "497oIjqRPco", "youtube_id": "497oIjqRPco", "readable_id": "multiplying-and-dividing-in-scientific-notation"}, "gRntusF_tVI": {"duration": 306, "path": "khan/math/algebra/systems-of-linear-equations/systems-of-linear-equations-word-problems/using-a-system-of-equations-to-find-the-price-of-apples-and-oranges/", "keywords": "", "id": "gRntusF_tVI", "title": "Systems of equations word problems example: Price of apples and oranges", "description": "Sal solves a word problem about the price of apples and oranges by creating a system of equations and solving it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gRntusF_tVI.mp4/gRntusF_tVI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gRntusF_tVI.mp4/gRntusF_tVI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gRntusF_tVI.m3u8/gRntusF_tVI.m3u8"}, "slug": "using-a-system-of-equations-to-find-the-price-of-apples-and-oranges", "video_id": "gRntusF_tVI", "youtube_id": "gRntusF_tVI", "readable_id": "using-a-system-of-equations-to-find-the-price-of-apples-and-oranges"}, "z0-1gBy1ykE": {"duration": 200, "path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/we-converting-radians-to-degrees/", "keywords": "radians, degrees", "id": "z0-1gBy1ykE", "title": "Example: Converting radians to degrees", "description": "Worked example showing how to convert radians to degrees", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z0-1gBy1ykE.mp4/z0-1gBy1ykE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z0-1gBy1ykE.mp4/z0-1gBy1ykE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z0-1gBy1ykE.m3u8/z0-1gBy1ykE.m3u8"}, "slug": "we-converting-radians-to-degrees", "video_id": "z0-1gBy1ykE", "youtube_id": "z0-1gBy1ykE", "readable_id": "we-converting-radians-to-degrees"}, "8x1-TeDxblU": {"duration": 778, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/cupcake-economics-3/", "keywords": "economics, finance, inflation, deflation, income, statement", "id": "8x1-TeDxblU", "title": "Cupcake economics 3", "description": "Using our spreadsheet to show why prices decrease when utilization is low and prices increase when utilization is high.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8x1-TeDxblU.mp4/8x1-TeDxblU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8x1-TeDxblU.mp4/8x1-TeDxblU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8x1-TeDxblU.m3u8/8x1-TeDxblU.m3u8"}, "slug": "cupcake-economics-3", "video_id": "8x1-TeDxblU", "youtube_id": "8x1-TeDxblU", "readable_id": "cupcake-economics-3"}, "-UZuG3XpAd0": {"duration": 246, "path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-mary-magdalene/", "keywords": "art history, renaissance", "id": "-UZuG3XpAd0", "title": "Donatello, Mary Magdalene", "description": "Donatello, Mary Magdalene, c. 1455, wood, 188 cm (Museo dell'Opera del Duomo, Florence)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-UZuG3XpAd0.mp4/-UZuG3XpAd0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-UZuG3XpAd0.mp4/-UZuG3XpAd0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-UZuG3XpAd0.m3u8/-UZuG3XpAd0.m3u8"}, "slug": "donatello-mary-magdalene", "video_id": "-UZuG3XpAd0", "youtube_id": "-UZuG3XpAd0", "readable_id": "donatello-mary-magdalene"}, "u1SAo2GiX8A": {"duration": 235, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-trinomials-by-grouping-4/", "keywords": "U09_L1_T3_we1, Factoring, Trinomials, by, Grouping, CC_39336_A-SSE_1_a, CC_39336_A-SSE_2", "id": "u1SAo2GiX8A", "title": "How to factor quadratics by grouping (example)", "description": "Sal factors 4y^2+4y-15 as (2y-3)(2y+5) by grouping.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u1SAo2GiX8A.mp4/u1SAo2GiX8A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u1SAo2GiX8A.mp4/u1SAo2GiX8A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u1SAo2GiX8A.m3u8/u1SAo2GiX8A.m3u8"}, "slug": "factoring-trinomials-by-grouping-4", "video_id": "u1SAo2GiX8A", "youtube_id": "u1SAo2GiX8A", "readable_id": "factoring-trinomials-by-grouping-4"}, "Av_Us6xHkUc": {"duration": 235, "path": "khan/math/recreational-math/vi-hart/singing/doodle-music/", "keywords": "doodling, mathematics, art, pattern, symmetry, frieze, music, doodle", "id": "Av_Us6xHkUc", "title": "Doodle music", "description": "A visual and musical expression of mathematical symmetry groups. The transformations done to the video are equivalent to the transformations done to the notes.\n\nThese type of repeating patterns are called frieze patterns. A couple wallpaper groups are also represented.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Av_Us6xHkUc.mp4/Av_Us6xHkUc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Av_Us6xHkUc.mp4/Av_Us6xHkUc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Av_Us6xHkUc.m3u8/Av_Us6xHkUc.m3u8"}, "slug": "doodle-music", "video_id": "Av_Us6xHkUc", "youtube_id": "Av_Us6xHkUc", "readable_id": "doodle-music"}, "OmVBfdmWItk": {"duration": 86, "path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/spout-tools/", "keywords": "", "id": "OmVBfdmWItk", "title": "Spout tools", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OmVBfdmWItk.mp4/OmVBfdmWItk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OmVBfdmWItk.mp4/OmVBfdmWItk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OmVBfdmWItk.m3u8/OmVBfdmWItk.m3u8"}, "slug": "spout-tools", "video_id": "OmVBfdmWItk", "youtube_id": "OmVBfdmWItk", "readable_id": "spout-tools"}, "YTuh7BmTNQc": {"duration": 55, "path": "khan/college-admissions/get-started/access-to-college/ss-time-management-obstacles/", "keywords": "", "id": "YTuh7BmTNQc", "title": "Student story: Overcoming time management obstacles to college", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YTuh7BmTNQc.mp4/YTuh7BmTNQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YTuh7BmTNQc.mp4/YTuh7BmTNQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YTuh7BmTNQc.m3u8/YTuh7BmTNQc.m3u8"}, "slug": "ss-time-management-obstacles", "video_id": "YTuh7BmTNQc", "youtube_id": "YTuh7BmTNQc", "readable_id": "ss-time-management-obstacles"}, "3ebYvMC12HI": {"duration": 488, "path": "khan/humanities/ancient-art-civilizations/greek-art/classical/erechtheion/", "keywords": "Erechtheion, Greece, Greek, Arcopolis, Athens, ancient, caryatid, Erechtheum, King Erechtheus, Zeus, Athena, Poseidon", "id": "3ebYvMC12HI", "title": "The Erechtheion", "description": "The Erechtheion, 421-405 B.C.E. (Classical Greek), Acropolis, Athens\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3ebYvMC12HI.mp4/3ebYvMC12HI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3ebYvMC12HI.mp4/3ebYvMC12HI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3ebYvMC12HI.m3u8/3ebYvMC12HI.m3u8"}, "slug": "erechtheion", "video_id": "3ebYvMC12HI", "youtube_id": "3ebYvMC12HI", "readable_id": "erechtheion"}, "LqNogu68JQQ": {"duration": 210, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p1-easier/", "keywords": "", "id": "LqNogu68JQQ", "title": "Quadratic and exponential word problems \u2014 Basic example", "description": "Watch Sal work through a basic Quadratic and exponential word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LqNogu68JQQ.mp4/LqNogu68JQQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LqNogu68JQQ.mp4/LqNogu68JQQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LqNogu68JQQ.m3u8/LqNogu68JQQ.m3u8"}, "slug": "sat-math-p1-easier", "video_id": "LqNogu68JQQ", "youtube_id": "LqNogu68JQQ", "readable_id": "sat-math-p1-easier"}, "rdaxI6ekLLQ": {"duration": 183, "path": "khan/humanities/art-asia/imperial-china/shang-dynasty/rhinoceros-vessel/", "keywords": "", "id": "rdaxI6ekLLQ", "title": "Ritual vessel in the shape of a rhinoceros", "description": "Few Chinese vessels made during the Bronze Age (approx. 1500\u2013221 B.C.E.) were in the form of animals, and most of those featured surface decorations of other animals, like tigers or dragons. Listen to Jay Xu, Director of the Asian Art Museum, discuss one of the museum's masterpieces, a ritual vessel in the shape of a rhinoceros, as you view the object in 3D. Learn more about this ritual vessel on the Asian Art Museum's education website.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rdaxI6ekLLQ.mp4/rdaxI6ekLLQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rdaxI6ekLLQ.mp4/rdaxI6ekLLQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rdaxI6ekLLQ.m3u8/rdaxI6ekLLQ.m3u8"}, "slug": "rhinoceros-vessel", "video_id": "rdaxI6ekLLQ", "youtube_id": "rdaxI6ekLLQ", "readable_id": "rhinoceros-vessel"}, "MT4akJsAmb0": {"duration": 850, "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/allocative-efficiency-and-marginal-benefit/", "keywords": "productive, allocative, efficiency, marginal, cost, benefit", "id": "MT4akJsAmb0", "title": "Allocative efficiency and marginal benefit", "description": "Marginal Utility and maximization", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MT4akJsAmb0.mp4/MT4akJsAmb0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MT4akJsAmb0.mp4/MT4akJsAmb0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MT4akJsAmb0.m3u8/MT4akJsAmb0.m3u8"}, "slug": "allocative-efficiency-and-marginal-benefit", "video_id": "MT4akJsAmb0", "youtube_id": "MT4akJsAmb0", "readable_id": "allocative-efficiency-and-marginal-benefit"}, "Qod67l16LfQ": {"duration": 599, "path": "khan/test-prep/gmat/problem-solving/gmat-math-23/", "keywords": "GMAT, Math, problem, solving", "id": "Qod67l16LfQ", "title": "GMAT: Math 23", "description": "120-123, pg. 168", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qod67l16LfQ.mp4/Qod67l16LfQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qod67l16LfQ.mp4/Qod67l16LfQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qod67l16LfQ.m3u8/Qod67l16LfQ.m3u8"}, "slug": "gmat-math-23", "video_id": "Qod67l16LfQ", "youtube_id": "Qod67l16LfQ", "readable_id": "gmat-math-23"}, "zOrkcZ1dlHk": {"duration": 273, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-16-possible-values-for-t/", "keywords": "", "id": "zOrkcZ1dlHk", "title": "16 Possible values for t", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zOrkcZ1dlHk.mp4/zOrkcZ1dlHk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zOrkcZ1dlHk.mp4/zOrkcZ1dlHk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zOrkcZ1dlHk.m3u8/zOrkcZ1dlHk.m3u8"}, "slug": "sat-16-possible-values-for-t", "video_id": "zOrkcZ1dlHk", "youtube_id": "zOrkcZ1dlHk", "readable_id": "sat-16-possible-values-for-t"}, "WfMfs6naKkE": {"duration": 699, "path": "khan/science/discoveries-projects/robots/spider_bot/santa_rita_spider_bots/", "keywords": "spider, spider bot, make, hack, robot, project based learning, hands-on projects, Khan Academy, Arduino", "id": "WfMfs6naKkE", "title": "6th graders learn to build a Spider robot", "description": "Vicki Lombardi's 6th grade students at Santa Rita Elementary in Los Altos School district learn how to build a Spider robot.\n\nRead more at: http://lasdilearn.blogspot.com/2013/02/third-graders-building-robots-mission.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WfMfs6naKkE.mp4/WfMfs6naKkE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WfMfs6naKkE.mp4/WfMfs6naKkE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WfMfs6naKkE.m3u8/WfMfs6naKkE.m3u8"}, "slug": "santa_rita_spider_bots", "video_id": "WfMfs6naKkE", "youtube_id": "WfMfs6naKkE", "readable_id": "santa_rita_spider_bots"}, "A-ykhY_IoaU": {"duration": 246, "path": "khan/math/early-math/cc-early-math-add-sub-basics/cc-early-math-making-5-9/making-5/", "keywords": "", "id": "A-ykhY_IoaU", "title": "Making five", "description": "Learn how to add numbers to make the number five.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A-ykhY_IoaU.mp4/A-ykhY_IoaU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A-ykhY_IoaU.mp4/A-ykhY_IoaU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A-ykhY_IoaU.m3u8/A-ykhY_IoaU.m3u8"}, "slug": "making-5", "video_id": "A-ykhY_IoaU", "youtube_id": "A-ykhY_IoaU", "readable_id": "making-5"}, "E7OkUomRq1Q": {"duration": 778, "path": "khan/test-prep/iit-jee-subject/iit-jee/complex-determinant-example/", "keywords": "2010, IIT, JEE, Paper, Problem, 53, Complex, Determinant", "id": "E7OkUomRq1Q", "title": "Complex determinant example", "description": "2010 IIT JEE Paper 1 Problem 53 Complex Determinant", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E7OkUomRq1Q.mp4/E7OkUomRq1Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E7OkUomRq1Q.mp4/E7OkUomRq1Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E7OkUomRq1Q.m3u8/E7OkUomRq1Q.m3u8"}, "slug": "complex-determinant-example", "video_id": "E7OkUomRq1Q", "youtube_id": "E7OkUomRq1Q", "readable_id": "complex-determinant-example"}, "1LxhXqD3_CE": {"duration": 447, "path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/generalized-taylor-series-approximation/", "keywords": "taylor, maclaurin, function, approximation", "id": "1LxhXqD3_CE", "title": "Generalized Taylor series approximation", "description": "Approximating a function around a non-zero x value", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1LxhXqD3_CE.mp4/1LxhXqD3_CE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1LxhXqD3_CE.mp4/1LxhXqD3_CE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1LxhXqD3_CE.m3u8/1LxhXqD3_CE.m3u8"}, "slug": "generalized-taylor-series-approximation", "video_id": "1LxhXqD3_CE", "youtube_id": "1LxhXqD3_CE", "readable_id": "generalized-taylor-series-approximation"}, "ZGIPntpFCOc": {"duration": 546, "path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/titles-and-deeds-in-real-estate/", "keywords": "", "id": "ZGIPntpFCOc", "title": "Titles and deeds in real estate", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZGIPntpFCOc.mp4/ZGIPntpFCOc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZGIPntpFCOc.mp4/ZGIPntpFCOc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZGIPntpFCOc.m3u8/ZGIPntpFCOc.m3u8"}, "slug": "titles-and-deeds-in-real-estate", "video_id": "ZGIPntpFCOc", "youtube_id": "ZGIPntpFCOc", "readable_id": "titles-and-deeds-in-real-estate"}, "JPoQeuWybIo": {"duration": 337, "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-mark-rothko/", "keywords": "", "id": "JPoQeuWybIo", "title": "Mark Rothko", "description": "Explore the power of abstraction through Mark Rothko's luminous and introspective paintings. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JPoQeuWybIo.mp4/JPoQeuWybIo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JPoQeuWybIo.mp4/JPoQeuWybIo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JPoQeuWybIo.m3u8/JPoQeuWybIo.m3u8"}, "slug": "moma-mark-rothko", "video_id": "JPoQeuWybIo", "youtube_id": "JPoQeuWybIo", "readable_id": "moma-mark-rothko"}, "UjfmOmPARyk": {"duration": 288, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-two-dig-intro/breaking-apart-two-digit-addition-problems/", "keywords": "education,online learning,learning,lessons", "id": "UjfmOmPARyk", "title": "Breaking apart two digit addition problems", "description": "Let's think about ways to break up addition problems. This is useful because it might make it easier for us to actually compute the addition.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UjfmOmPARyk.mp4/UjfmOmPARyk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UjfmOmPARyk.mp4/UjfmOmPARyk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UjfmOmPARyk.m3u8/UjfmOmPARyk.m3u8"}, "slug": "breaking-apart-two-digit-addition-problems", "video_id": "UjfmOmPARyk", "youtube_id": "UjfmOmPARyk", "readable_id": "breaking-apart-two-digit-addition-problems"}, "oMNaQjtXSGc": {"duration": 328, "path": "khan/test-prep/mcat/individuals-and-society/self-presentation-and-interacting-with-others/george-herbert-mead-the-i-and-the-me/", "keywords": "", "id": "oMNaQjtXSGc", "title": "George Herbert Mead- The I and the Me", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oMNaQjtXSGc.mp4/oMNaQjtXSGc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oMNaQjtXSGc.mp4/oMNaQjtXSGc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oMNaQjtXSGc.m3u8/oMNaQjtXSGc.m3u8"}, "slug": "george-herbert-mead-the-i-and-the-me", "video_id": "oMNaQjtXSGc", "youtube_id": "oMNaQjtXSGc", "readable_id": "george-herbert-mead-the-i-and-the-me"}, "4h54s7BBPpA": {"duration": 107, "path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-of-a-radical-function/", "keywords": "u17_l2_t3_we2, Domain, of, Radical, Function", "id": "4h54s7BBPpA", "title": "How to determine the domain of a radical function (example)", "description": "Sal finds the domain of f(x)=\u221a(2x-8).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4h54s7BBPpA.mp4/4h54s7BBPpA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4h54s7BBPpA.mp4/4h54s7BBPpA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4h54s7BBPpA.m3u8/4h54s7BBPpA.m3u8"}, "slug": "domain-of-a-radical-function", "video_id": "4h54s7BBPpA", "youtube_id": "4h54s7BBPpA", "readable_id": "domain-of-a-radical-function"}, "rU222pVq520": {"duration": 236, "path": "khan/math/differential-calculus/limits_topic/algebraic-limits/limit-factoring-cubic/", "keywords": "", "id": "rU222pVq520", "title": "Limit by factoring cubic expression", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rU222pVq520.mp4/rU222pVq520.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rU222pVq520.mp4/rU222pVq520.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rU222pVq520.m3u8/rU222pVq520.m3u8"}, "slug": "limit-factoring-cubic", "video_id": "rU222pVq520", "youtube_id": "rU222pVq520", "readable_id": "limit-factoring-cubic"}, "62NoiGwZmd4": {"duration": 123, "path": "khan/math/pre-algebra/order-of-operations/arithmetic_properties/properties-of-numbers-1/", "keywords": "", "id": "62NoiGwZmd4", "title": "Properties of numbers 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/62NoiGwZmd4.mp4/62NoiGwZmd4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/62NoiGwZmd4.mp4/62NoiGwZmd4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/62NoiGwZmd4.m3u8/62NoiGwZmd4.m3u8"}, "slug": "properties-of-numbers-1", "video_id": "62NoiGwZmd4", "youtube_id": "62NoiGwZmd4", "readable_id": "properties-of-numbers-1"}, "5AWob_z74Ks": {"duration": 1511, "path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/defining-the-angle-between-vectors/", "keywords": "Linear, Algebra, Vectors, dot, product, angle", "id": "5AWob_z74Ks", "title": "Defining the angle between vectors", "description": "Introducing the idea of an angle between two vectors", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5AWob_z74Ks.mp4/5AWob_z74Ks.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5AWob_z74Ks.mp4/5AWob_z74Ks.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5AWob_z74Ks.m3u8/5AWob_z74Ks.m3u8"}, "slug": "defining-the-angle-between-vectors", "video_id": "5AWob_z74Ks", "youtube_id": "5AWob_z74Ks", "readable_id": "defining-the-angle-between-vectors"}, "nlUG4OKN1IY": {"duration": 1128, "path": "khan/math/differential-equations/laplace-transform/laplace-transform-to-solve-differential-equation/using-the-laplace-transform-to-solve-a-nonhomogenous-eq/", "keywords": "laplace, transform, differential, equations", "id": "nlUG4OKN1IY", "title": "Using the Laplace transform to solve a nonhomogeneous eq", "description": "Solving a non-homogeneous differential equation using the Laplace Transform", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nlUG4OKN1IY.mp4/nlUG4OKN1IY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nlUG4OKN1IY.mp4/nlUG4OKN1IY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nlUG4OKN1IY.m3u8/nlUG4OKN1IY.m3u8"}, "slug": "using-the-laplace-transform-to-solve-a-nonhomogenous-eq", "video_id": "nlUG4OKN1IY", "youtube_id": "nlUG4OKN1IY", "readable_id": "using-the-laplace-transform-to-solve-a-nonhomogenous-eq"}, "0v1C5x1ALI8": {"duration": 692, "path": "khan/test-prep/mcat/cells/cellular-development/mitochondria-apoptosis-and-oxidative-stress/", "keywords": "", "id": "0v1C5x1ALI8", "title": "Mitochondria, apoptosis, and oxidative stress", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0v1C5x1ALI8.mp4/0v1C5x1ALI8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0v1C5x1ALI8.mp4/0v1C5x1ALI8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0v1C5x1ALI8.m3u8/0v1C5x1ALI8.m3u8"}, "slug": "mitochondria-apoptosis-and-oxidative-stress", "video_id": "0v1C5x1ALI8", "youtube_id": "0v1C5x1ALI8", "readable_id": "mitochondria-apoptosis-and-oxidative-stress"}, "vlUVwfRarNQ": {"duration": 439, "path": "khan/college-admissions/paying-for-college/financial-aid-packages/financial-aid-package-components-part-1/", "keywords": "", "id": "vlUVwfRarNQ", "title": "Financial aid package components: Part 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vlUVwfRarNQ.mp4/vlUVwfRarNQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vlUVwfRarNQ.mp4/vlUVwfRarNQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vlUVwfRarNQ.m3u8/vlUVwfRarNQ.m3u8"}, "slug": "financial-aid-package-components-part-1", "video_id": "vlUVwfRarNQ", "youtube_id": "vlUVwfRarNQ", "readable_id": "financial-aid-package-components-part-1"}, "C1pHvEAKmLA": {"duration": 170, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/circular-econ-gdp-tutorial/more-on-final-and-intermediate-gdp-contributions/", "keywords": "macroeconomics", "id": "C1pHvEAKmLA", "title": "More on final and intermediate GDP contributions", "description": "What happens when a good is not finished in a period", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C1pHvEAKmLA.mp4/C1pHvEAKmLA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C1pHvEAKmLA.mp4/C1pHvEAKmLA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C1pHvEAKmLA.m3u8/C1pHvEAKmLA.m3u8"}, "slug": "more-on-final-and-intermediate-gdp-contributions", "video_id": "C1pHvEAKmLA", "youtube_id": "C1pHvEAKmLA", "readable_id": "more-on-final-and-intermediate-gdp-contributions"}, "5JuDBwB28_w": {"duration": 274, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q4-easier/", "keywords": "", "id": "5JuDBwB28_w", "title": "Scatterplots \u2014 Basic example", "description": "Watch Sal work through a basic Scatterplots problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5JuDBwB28_w.mp4/5JuDBwB28_w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5JuDBwB28_w.mp4/5JuDBwB28_w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5JuDBwB28_w.m3u8/5JuDBwB28_w.m3u8"}, "slug": "sat-math-q4-easier", "video_id": "5JuDBwB28_w", "youtube_id": "5JuDBwB28_w", "readable_id": "sat-math-q4-easier"}, "v5Oz9kVptCY": {"duration": 72, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-24-museum-funding/", "keywords": "", "id": "v5Oz9kVptCY", "title": "24 Museum funding", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v5Oz9kVptCY.mp4/v5Oz9kVptCY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v5Oz9kVptCY.mp4/v5Oz9kVptCY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v5Oz9kVptCY.m3u8/v5Oz9kVptCY.m3u8"}, "slug": "sat-24-museum-funding", "video_id": "v5Oz9kVptCY", "youtube_id": "v5Oz9kVptCY", "readable_id": "sat-24-museum-funding"}, "DtCfOMl3qo0": {"duration": 396, "path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/calculating-federal-taxes-and-take-home-pay/", "keywords": "", "id": "DtCfOMl3qo0", "title": "Calculating federal taxes and take home pay", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DtCfOMl3qo0.mp4/DtCfOMl3qo0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DtCfOMl3qo0.mp4/DtCfOMl3qo0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DtCfOMl3qo0.m3u8/DtCfOMl3qo0.m3u8"}, "slug": "calculating-federal-taxes-and-take-home-pay", "video_id": "DtCfOMl3qo0", "youtube_id": "DtCfOMl3qo0", "readable_id": "calculating-federal-taxes-and-take-home-pay"}, "dWxcQZBM3eQ": {"duration": 263, "path": "khan/humanities/medieval-world/latin-western-europe/early-medieval/sutton-hoo-ship-burial-c-700/", "keywords": "sutton Hoo, Medieval, Art History, Anglo-Saxon, British Museum, Smarthistory", "id": "dWxcQZBM3eQ", "title": "Sutton Hoo ship burial", "description": "Sutton Hoo Ship Burial, c. 700 (British Museum, London)\n\nMultiple bronze, gold and silver objects of Anglo Saxon origin, found in Suffolk, England, including: a helmet, sceptre, sword, hanging bowl, bowls and spoons, shoulder clasps, a belt buckle, and purse lid.\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dWxcQZBM3eQ.mp4/dWxcQZBM3eQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dWxcQZBM3eQ.mp4/dWxcQZBM3eQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dWxcQZBM3eQ.m3u8/dWxcQZBM3eQ.m3u8"}, "slug": "sutton-hoo-ship-burial-c-700", "video_id": "dWxcQZBM3eQ", "youtube_id": "dWxcQZBM3eQ", "readable_id": "sutton-hoo-ship-burial-c-700"}, "G-T_6hCdMQc": {"duration": 731, "path": "khan/math/trigonometry/basic-trigonometry/basic_trig_ratios/basic-trigonometry-ii/", "keywords": "trig, sin, cos, tan", "id": "G-T_6hCdMQc", "title": "Basic trigonometry II", "description": "A few more examples using SOH CAH TOA", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/G-T_6hCdMQc.mp4/G-T_6hCdMQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/G-T_6hCdMQc.mp4/G-T_6hCdMQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/G-T_6hCdMQc.m3u8/G-T_6hCdMQc.m3u8"}, "slug": "basic-trigonometry-ii", "video_id": "G-T_6hCdMQc", "youtube_id": "G-T_6hCdMQc", "readable_id": "basic-trigonometry-ii"}, "j9ZPMlVHJVs": {"duration": 800, "path": "khan/math/probability/statistics-inferential/anova/anova-2-calculating-ssw-and-ssb-total-sum-of-squares-within-and-between-avi/", "keywords": "ANOVA, Calculating, SSW, and, SSB, (Total, Sum, of, Squares, Within, Between).avi, CC_7_SP_3, CC_7_SP_4", "id": "j9ZPMlVHJVs", "title": "ANOVA 2: Calculating SSW and SSB (total sum of squares within and between)", "description": "Analysis of Variance 2 - Calculating SSW and SSB (Total Sum of Squares Within and Between).avi", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j9ZPMlVHJVs.mp4/j9ZPMlVHJVs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j9ZPMlVHJVs.mp4/j9ZPMlVHJVs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j9ZPMlVHJVs.m3u8/j9ZPMlVHJVs.m3u8"}, "slug": "anova-2-calculating-ssw-and-ssb-total-sum-of-squares-within-and-between-avi", "video_id": "j9ZPMlVHJVs", "youtube_id": "j9ZPMlVHJVs", "readable_id": "anova-2-calculating-ssw-and-ssb-total-sum-of-squares-within-and-between-avi"}, "G4CgOF4ccXk": {"duration": 599, "path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-7/", "keywords": "physics, flux, viscosity, laminar, flow, pressure, fluid, motion", "id": "G4CgOF4ccXk", "title": "Volume flow rate and equation of continuity", "description": "Sal introduces the notion of moving fluids and laminar flow. Then he uses the incompressibility of a liquid to show that the volume flow rate (flux) must remain constant. Sal then derives the equation of continuity in terms of the area and speed.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/G4CgOF4ccXk.mp4/G4CgOF4ccXk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/G4CgOF4ccXk.mp4/G4CgOF4ccXk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/G4CgOF4ccXk.m3u8/G4CgOF4ccXk.m3u8"}, "slug": "fluids-part-7", "video_id": "G4CgOF4ccXk", "youtube_id": "G4CgOF4ccXk", "readable_id": "fluids-part-7"}, "9AoDucUmO20": {"duration": 564, "path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/polynomial-approximations-of-functions-part-5/", "keywords": "math, calculus, series, maclaurin, taylor, sin", "id": "9AoDucUmO20", "title": "Polynomial approximations of functions (part 5)", "description": "MacLaurin representation of sin x", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9AoDucUmO20.mp4/9AoDucUmO20.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9AoDucUmO20.mp4/9AoDucUmO20.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9AoDucUmO20.m3u8/9AoDucUmO20.m3u8"}, "slug": "polynomial-approximations-of-functions-part-5", "video_id": "9AoDucUmO20", "youtube_id": "9AoDucUmO20", "readable_id": "polynomial-approximations-of-functions-part-5"}, "X-m0JDCw6TE": {"duration": 344, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/overview-of-the-functions-of-the-cerebral-cortex/", "keywords": "", "id": "X-m0JDCw6TE", "title": "Overview of the functions of the cerebral cortex", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X-m0JDCw6TE.mp4/X-m0JDCw6TE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X-m0JDCw6TE.mp4/X-m0JDCw6TE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X-m0JDCw6TE.m3u8/X-m0JDCw6TE.m3u8"}, "slug": "overview-of-the-functions-of-the-cerebral-cortex", "video_id": "X-m0JDCw6TE", "youtube_id": "X-m0JDCw6TE", "readable_id": "overview-of-the-functions-of-the-cerebral-cortex"}, "J-ftiWffNTc": {"duration": 596, "path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/local-threats-to-biodiversity/introduced-species-and-biodiversity/", "keywords": "", "id": "J-ftiWffNTc", "title": "Introduced species and biodiversity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J-ftiWffNTc.mp4/J-ftiWffNTc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J-ftiWffNTc.mp4/J-ftiWffNTc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J-ftiWffNTc.m3u8/J-ftiWffNTc.m3u8"}, "slug": "introduced-species-and-biodiversity", "video_id": "J-ftiWffNTc", "youtube_id": "J-ftiWffNTc", "readable_id": "introduced-species-and-biodiversity"}, "8SsC5st4LnI": {"duration": 1085, "path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/taylor-polynomials/", "keywords": "taylor, series, polynomial, approximation", "id": "8SsC5st4LnI", "title": "Taylor polynomials", "description": "Approximating a function with a Taylor Polynomial", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8SsC5st4LnI.mp4/8SsC5st4LnI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8SsC5st4LnI.mp4/8SsC5st4LnI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8SsC5st4LnI.m3u8/8SsC5st4LnI.m3u8"}, "slug": "taylor-polynomials", "video_id": "8SsC5st4LnI", "youtube_id": "8SsC5st4LnI", "readable_id": "taylor-polynomials"}, "Qwet4cIpnCM": {"duration": 579, "path": "khan/math/geometry/right_triangles_topic/special_right_triangles/intro-to-30-60-90-triangles/", "keywords": "Geometry, Math, Khan", "id": "Qwet4cIpnCM", "title": "Intro to 30-60-90 triangles", "description": "A few more 45-45-90 examples and an introduction to 30-60-90 triangles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qwet4cIpnCM.mp4/Qwet4cIpnCM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qwet4cIpnCM.mp4/Qwet4cIpnCM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qwet4cIpnCM.m3u8/Qwet4cIpnCM.m3u8"}, "slug": "intro-to-30-60-90-triangles", "video_id": "Qwet4cIpnCM", "youtube_id": "Qwet4cIpnCM", "readable_id": "intro-to-30-60-90-triangles"}, "P_HHvi7Kwzk": {"duration": 430, "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/what-is-multiple-sclerosis/", "keywords": "", "id": "P_HHvi7Kwzk", "title": "What is multiple sclerosis?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P_HHvi7Kwzk.mp4/P_HHvi7Kwzk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P_HHvi7Kwzk.mp4/P_HHvi7Kwzk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P_HHvi7Kwzk.m3u8/P_HHvi7Kwzk.m3u8"}, "slug": "what-is-multiple-sclerosis", "video_id": "P_HHvi7Kwzk", "youtube_id": "P_HHvi7Kwzk", "readable_id": "what-is-multiple-sclerosis"}, "TvSKeTFsaj4": {"duration": 377, "path": "khan/math/pre-algebra/decimals-pre-alg/percent-word-probs-pre-alg/solving-percent-problems/", "keywords": "U05_L2_T1_we1, Solving, Percent, Problems", "id": "TvSKeTFsaj4", "title": "Solving percent problems", "description": "We'll use algebra to solve this percent problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TvSKeTFsaj4.mp4/TvSKeTFsaj4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TvSKeTFsaj4.mp4/TvSKeTFsaj4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TvSKeTFsaj4.m3u8/TvSKeTFsaj4.m3u8"}, "slug": "solving-percent-problems", "video_id": "TvSKeTFsaj4", "youtube_id": "TvSKeTFsaj4", "readable_id": "solving-percent-problems"}, "tSNtCg7o7bA": {"duration": 614, "path": "khan/math/algebra/quadratics/quadratic_odds_ends/ca-algebra-i-quadratic-equation/", "keywords": "algebra, quadratic, equation", "id": "tSNtCg7o7bA", "title": "CA Algebra I: Quadratic equation", "description": "53-57, Quadratic Equation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tSNtCg7o7bA.mp4/tSNtCg7o7bA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tSNtCg7o7bA.mp4/tSNtCg7o7bA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tSNtCg7o7bA.m3u8/tSNtCg7o7bA.m3u8"}, "slug": "ca-algebra-i-quadratic-equation", "video_id": "tSNtCg7o7bA", "youtube_id": "tSNtCg7o7bA", "readable_id": "ca-algebra-i-quadratic-equation"}, "pT6tFia8eaY": {"duration": 506, "path": "khan/humanities/history/euro-hist/mussolini-fascism/mussolini-becomes-absolute-dictator-il-duce/", "keywords": "", "id": "pT6tFia8eaY", "title": "Mussolini becomes absolute dictator (Il Duce)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pT6tFia8eaY.mp4/pT6tFia8eaY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pT6tFia8eaY.mp4/pT6tFia8eaY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pT6tFia8eaY.m3u8/pT6tFia8eaY.m3u8"}, "slug": "mussolini-becomes-absolute-dictator-il-duce", "video_id": "pT6tFia8eaY", "youtube_id": "pT6tFia8eaY", "readable_id": "mussolini-becomes-absolute-dictator-il-duce"}, "FcLeaD3UII4": {"duration": 234, "path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/applying-the-fundamental-theorem-of-calculus/", "keywords": "", "id": "FcLeaD3UII4", "title": "Applying the fundamental theorem of calculus", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FcLeaD3UII4.mp4/FcLeaD3UII4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FcLeaD3UII4.mp4/FcLeaD3UII4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FcLeaD3UII4.m3u8/FcLeaD3UII4.m3u8"}, "slug": "applying-the-fundamental-theorem-of-calculus", "video_id": "FcLeaD3UII4", "youtube_id": "FcLeaD3UII4", "readable_id": "applying-the-fundamental-theorem-of-calculus"}, "HUn4XwV7o9I": {"duration": 89, "path": "khan/math/algebra-basics/core-algebra-graphing-lines-slope/solutions-graphs-two-variable-equations/ordered-pair-solutions-of-equations/", "keywords": "u13_l1_t2_we3, Ordered, pair, solutions, of, equations, CC_8_EE_7_a, CC_39336_A-REI_10", "id": "HUn4XwV7o9I", "title": "Ordered pair solutions to equations", "description": "Ordered pair solutions of equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HUn4XwV7o9I.mp4/HUn4XwV7o9I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HUn4XwV7o9I.mp4/HUn4XwV7o9I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HUn4XwV7o9I.m3u8/HUn4XwV7o9I.m3u8"}, "slug": "ordered-pair-solutions-of-equations", "video_id": "HUn4XwV7o9I", "youtube_id": "HUn4XwV7o9I", "readable_id": "ordered-pair-solutions-of-equations"}, "_01wqwsb66E": {"duration": 193, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-factorization/monomial-greatest-common-factor/", "keywords": "u12_l1_t1_we1, Monomial, Greatest, Common, Factor, CC_39336_A-SSE_1_a", "id": "_01wqwsb66E", "title": "How to find the greatest common factor of two monomials (example)", "description": "Sal finds the greatest common factor of 10cd^2 and 25c^3d^2.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_01wqwsb66E.mp4/_01wqwsb66E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_01wqwsb66E.mp4/_01wqwsb66E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_01wqwsb66E.m3u8/_01wqwsb66E.m3u8"}, "slug": "monomial-greatest-common-factor", "video_id": "_01wqwsb66E", "youtube_id": "_01wqwsb66E", "readable_id": "monomial-greatest-common-factor"}, "S9xdJgPWO-w": {"duration": 605, "path": "khan/science/health-and-medicine/health-care-system/blue-cross-and-blue-shield/", "keywords": "Blue, Cross, and, Shield", "id": "S9xdJgPWO-w", "title": "Blue Cross and Blue Shield", "description": "Sal and Dr. Baker talk a bit about Blue Cross and Blue Shield", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S9xdJgPWO-w.mp4/S9xdJgPWO-w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S9xdJgPWO-w.mp4/S9xdJgPWO-w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S9xdJgPWO-w.m3u8/S9xdJgPWO-w.m3u8"}, "slug": "blue-cross-and-blue-shield", "video_id": "S9xdJgPWO-w", "youtube_id": "S9xdJgPWO-w", "readable_id": "blue-cross-and-blue-shield"}, "A00qfA9bE84": {"duration": 170, "path": "khan/humanities/art-americas/early-cultures/olmec/face/", "keywords": "dignity, mystery, sculpture, simplicity, stone, transcendence, Latin America & the Carribean", "id": "A00qfA9bE84", "title": "Mask", "description": "Met curator Joanne Pillsbury on immortality in Mask,\u00a010th\u20136th century B.C.E.,\u00a0by the Olmec peoples of ancient Mexico.\n\nDepicting a typical Olmec face with slanted, almond-shaped eyes and a toothless, slightly downturned mouth, this mask is rendered with simplicity and elegance. Its harmonious proportions are indicative of the sophistication attained by Olmec sculptors. The smooth, highly polished planes of cheek, forehead, and chin plus the almost fleshy quality of the nose and parted lips belie the incredible hardness of the jadeite cobble from which the mask was made. The face itself is neither human nor supernatural but, rather, an idealized type that incorporates otherworldly aspects\u2014such as the mouth, with its reference to the so-called were-jaguar, a powerful mythic being with human and jaguar traits.\n\nMasks of this size in stone have not been excavated in archaeological sites and it is difficult to determine their function. Lacking holes for eyes and nose, it could not have been worn over a living face, but there are attachment holes along the edges by means of which it might have been used as a costume element or adhered as a face to a mummy or a sacred bundle. There is a polished, circular depression on the back of the mask.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A00qfA9bE84.mp4/A00qfA9bE84.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A00qfA9bE84.mp4/A00qfA9bE84.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A00qfA9bE84.m3u8/A00qfA9bE84.m3u8"}, "slug": "face", "video_id": "A00qfA9bE84", "youtube_id": "A00qfA9bE84", "readable_id": "face"}, "duyYnXIhg4w": {"duration": 565, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-history-questions/", "keywords": "", "id": "duyYnXIhg4w", "title": "Reading: History and social studies \u2014 How-to Part 2", "description": "Watch Sal work through Part 2 of an SAT Reading: History and social studies passage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/duyYnXIhg4w.mp4/duyYnXIhg4w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/duyYnXIhg4w.mp4/duyYnXIhg4w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/duyYnXIhg4w.m3u8/duyYnXIhg4w.m3u8"}, "slug": "reading-history-questions", "video_id": "duyYnXIhg4w", "youtube_id": "duyYnXIhg4w", "readable_id": "reading-history-questions"}, "akm5H2JsccI": {"duration": 499, "path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/periodic-table-valence-electrons/", "keywords": "", "id": "akm5H2JsccI", "title": "The periodic table - valence electrons for main group", "description": "How to determine the number of valence electrons and draw Lewis structures for main group elements starting from the electron configuration.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/akm5H2JsccI.mp4/akm5H2JsccI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/akm5H2JsccI.mp4/akm5H2JsccI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/akm5H2JsccI.m3u8/akm5H2JsccI.m3u8"}, "slug": "periodic-table-valence-electrons", "video_id": "akm5H2JsccI", "youtube_id": "akm5H2JsccI", "readable_id": "periodic-table-valence-electrons"}, "JoC_x3Hzkkc": {"duration": 201, "path": "khan/humanities/art-asia/south-asia/buddhist-art2/varanasi/", "keywords": "", "id": "JoC_x3Hzkkc", "title": "Varanasi: sacred city", "description": "A short documentary about one of India's most sacred cities, Varanasi. Learn more about Varanasi on education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JoC_x3Hzkkc.mp4/JoC_x3Hzkkc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JoC_x3Hzkkc.mp4/JoC_x3Hzkkc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JoC_x3Hzkkc.m3u8/JoC_x3Hzkkc.m3u8"}, "slug": "varanasi", "video_id": "JoC_x3Hzkkc", "youtube_id": "JoC_x3Hzkkc", "readable_id": "varanasi"}, "Qs0J-O0HCbA": {"duration": 653, "path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/crash-course-world-history-14/", "keywords": "crash course", "id": "Qs0J-O0HCbA", "title": "The Dark Ages...how dark were they, really?", "description": "John Green teaches you about the so-called Dark Ages, which it turns out weren't as uniformly dark as you may have been led to believe. While Europe was indeed having some issues, many other parts of the world were thriving and relatively enlightened. John covers European Feudalism, the cultural blossoming of the Islamic world, and the scientific and artistic advances in China, all during these \"Dark Ages.\" Along the way, John will raise questions about the validity of Europe's status as a continent, reveal the best and worst years of his life, and frankly state that science and religion were once able to coexist.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qs0J-O0HCbA.mp4/Qs0J-O0HCbA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qs0J-O0HCbA.mp4/Qs0J-O0HCbA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qs0J-O0HCbA.m3u8/Qs0J-O0HCbA.m3u8"}, "slug": "crash-course-world-history-14", "video_id": "Qs0J-O0HCbA", "youtube_id": "Qs0J-O0HCbA", "readable_id": "crash-course-world-history-14"}, "fLKOBQ6cZHA": {"duration": 990, "path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/red-blood-cells/", "keywords": "red, blood, cell, hemoglobin", "id": "fLKOBQ6cZHA", "title": "Red blood cells", "description": "Oxygen uptake by hemoglobin in red blood cells", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fLKOBQ6cZHA.mp4/fLKOBQ6cZHA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fLKOBQ6cZHA.mp4/fLKOBQ6cZHA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fLKOBQ6cZHA.m3u8/fLKOBQ6cZHA.m3u8"}, "slug": "red-blood-cells", "video_id": "fLKOBQ6cZHA", "youtube_id": "fLKOBQ6cZHA", "readable_id": "red-blood-cells"}, "4qWdhOcTmeI": {"duration": 1050, "path": "khan/science/physics/forces-newtons-laws/tension-tutorial/mild-and-medium-tension/", "keywords": "", "id": "4qWdhOcTmeI", "title": "Mild and medium tension", "description": "David explains how to solve tension problems for hanging objects.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4qWdhOcTmeI.mp4/4qWdhOcTmeI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4qWdhOcTmeI.mp4/4qWdhOcTmeI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4qWdhOcTmeI.m3u8/4qWdhOcTmeI.m3u8"}, "slug": "mild-and-medium-tension", "video_id": "4qWdhOcTmeI", "youtube_id": "4qWdhOcTmeI", "readable_id": "mild-and-medium-tension"}, "U2iZ83oIZH0": {"duration": 410, "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/babylonian/ishtar-gate-and-processional-way-reconstruction-babylon-c-575-b-c-e/", "keywords": "dragons, aurochs, lion, Seven Wonders, Robert Koldewey, Reconstruction, Khan Academy, Google Art Project, Smarthistory, Art History, OER, Ishtar, Gate, Nebuchadnezzar II, Nebuchadnezzar, Biblical, Processional Way, Babylon, 575 B.C.E., glazed brick, Pergamon Museum, Berlin, faince, Ancient, Babylonia, tower of Babel", "id": "U2iZ83oIZH0", "title": "Ishtar gate and Processional Way", "description": "Reconstruction of the Ishtar Gate and Processional Way, Babylon, c. 575 B.C.E., glazed mud brick (Pergamon Museum, Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U2iZ83oIZH0.mp4/U2iZ83oIZH0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U2iZ83oIZH0.mp4/U2iZ83oIZH0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U2iZ83oIZH0.m3u8/U2iZ83oIZH0.m3u8"}, "slug": "ishtar-gate-and-processional-way-reconstruction-babylon-c-575-b-c-e", "video_id": "U2iZ83oIZH0", "youtube_id": "U2iZ83oIZH0", "readable_id": "ishtar-gate-and-processional-way-reconstruction-babylon-c-575-b-c-e"}, "3iNCb7P_bdY": {"duration": 83, "path": "khan/science/discoveries-projects/discoveries/batteries/reverse-polarity/", "keywords": "polarity", "id": "3iNCb7P_bdY", "title": "Reverse electrodes (polarity)", "description": "What happens to the deflection when we attach the penny and zinc in the opposite direction?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3iNCb7P_bdY.mp4/3iNCb7P_bdY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3iNCb7P_bdY.mp4/3iNCb7P_bdY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3iNCb7P_bdY.m3u8/3iNCb7P_bdY.m3u8"}, "slug": "reverse-polarity", "video_id": "3iNCb7P_bdY", "youtube_id": "3iNCb7P_bdY", "readable_id": "reverse-polarity"}, "1JT9oODsClE": {"duration": 870, "path": "khan/math/probability/statistics-inferential/hypothesis-testing/large-sample-proportion-hypothesis-testing/", "keywords": "Large, Sample, Proportion, Hypothesis, Testing", "id": "1JT9oODsClE", "title": "Large sample proportion hypothesis testing", "description": "Large Sample Proportion Hypothesis Testing", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1JT9oODsClE.mp4/1JT9oODsClE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1JT9oODsClE.mp4/1JT9oODsClE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1JT9oODsClE.m3u8/1JT9oODsClE.m3u8"}, "slug": "large-sample-proportion-hypothesis-testing", "video_id": "1JT9oODsClE", "youtube_id": "1JT9oODsClE", "readable_id": "large-sample-proportion-hypothesis-testing"}, "haS083Zbib4": {"duration": 395, "path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/types-of-escrow-in-real-estate/", "keywords": "", "id": "haS083Zbib4", "title": "Types of escrow in real estate", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/haS083Zbib4.mp4/haS083Zbib4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/haS083Zbib4.mp4/haS083Zbib4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/haS083Zbib4.m3u8/haS083Zbib4.m3u8"}, "slug": "types-of-escrow-in-real-estate", "video_id": "haS083Zbib4", "youtube_id": "haS083Zbib4", "readable_id": "types-of-escrow-in-real-estate"}, "2tyEjbFaXdA": {"duration": 142, "path": "khan/humanities/art-asia/art-japan/edo-period/pleasure-quarter/", "keywords": "", "id": "2tyEjbFaXdA", "title": "Street scene in the pleasure quarter of Edo Japan", "description": "Discover the cast of characters in a woodblock print of the Yoshiwara pleasure quarter in Edo Japan (present-day Tokyo).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2tyEjbFaXdA.mp4/2tyEjbFaXdA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2tyEjbFaXdA.mp4/2tyEjbFaXdA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2tyEjbFaXdA.m3u8/2tyEjbFaXdA.m3u8"}, "slug": "pleasure-quarter", "video_id": "2tyEjbFaXdA", "youtube_id": "2tyEjbFaXdA", "readable_id": "pleasure-quarter"}, "yOf3kDD3WIA": {"duration": 628, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/what-is-afterload/", "keywords": "", "id": "yOf3kDD3WIA", "title": "What is afterload?", "description": "Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yOf3kDD3WIA.mp4/yOf3kDD3WIA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yOf3kDD3WIA.mp4/yOf3kDD3WIA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yOf3kDD3WIA.m3u8/yOf3kDD3WIA.m3u8"}, "slug": "what-is-afterload", "video_id": "yOf3kDD3WIA", "youtube_id": "yOf3kDD3WIA", "readable_id": "what-is-afterload"}, "9YjXGLWMvCM": {"duration": 52, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/reading_data/reading-bar-charts-1/", "keywords": "", "id": "9YjXGLWMvCM", "title": "Reading bar charts: basic example", "description": "Let's start with this bar chart that brings back the days of Harry Potter! Putting our toes in the water on this one...", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9YjXGLWMvCM.mp4/9YjXGLWMvCM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9YjXGLWMvCM.mp4/9YjXGLWMvCM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9YjXGLWMvCM.m3u8/9YjXGLWMvCM.m3u8"}, "slug": "reading-bar-charts-1", "video_id": "9YjXGLWMvCM", "youtube_id": "9YjXGLWMvCM", "readable_id": "reading-bar-charts-1"}, "r4bH66vYjss": {"duration": 1533, "path": "khan/math/linear-algebra/vectors_and_spaces/vectors/linear-algebra-vector-examples/", "keywords": "Linear, Algebra, Vectors", "id": "r4bH66vYjss", "title": "Vector examples", "description": "Visually understanding basic vector operations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/r4bH66vYjss.mp4/r4bH66vYjss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/r4bH66vYjss.mp4/r4bH66vYjss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/r4bH66vYjss.m3u8/r4bH66vYjss.m3u8"}, "slug": "linear-algebra-vector-examples", "video_id": "r4bH66vYjss", "youtube_id": "r4bH66vYjss", "readable_id": "linear-algebra-vector-examples"}, "YOT8ryWzwbY": {"duration": 361, "path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/more-on-elasticity-of-demand/", "keywords": "economics, elasticity, demand", "id": "YOT8ryWzwbY", "title": "More on elasticity of demand", "description": "Looking a bit deeper at why elasticity changes despite having a linear demand curve", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YOT8ryWzwbY.mp4/YOT8ryWzwbY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YOT8ryWzwbY.mp4/YOT8ryWzwbY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YOT8ryWzwbY.m3u8/YOT8ryWzwbY.m3u8"}, "slug": "more-on-elasticity-of-demand", "video_id": "YOT8ryWzwbY", "youtube_id": "YOT8ryWzwbY", "readable_id": "more-on-elasticity-of-demand"}, "SL7J8hPKEWY": {"duration": 116, "path": "khan/computing/computer-science/cryptography/modern-crypt/discrete-logarithm-problem/", "keywords": "discrete logarithm, logarithm", "id": "SL7J8hPKEWY", "title": "The discrete logarithm problem", "description": "A mathematical lock using modular arithmetic", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SL7J8hPKEWY.mp4/SL7J8hPKEWY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SL7J8hPKEWY.mp4/SL7J8hPKEWY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SL7J8hPKEWY.m3u8/SL7J8hPKEWY.m3u8"}, "slug": "discrete-logarithm-problem", "video_id": "SL7J8hPKEWY", "youtube_id": "SL7J8hPKEWY", "readable_id": "discrete-logarithm-problem"}, "wToSIQJ2o_8": {"duration": 585, "path": "khan/math/precalculus/parametric_equations/parametric/parametric-equations-2/", "keywords": "parametric, equation, physics, CC_39336_F-BF_1_c", "id": "wToSIQJ2o_8", "title": "Parametric equations 2", "description": "Eliminating the parameter", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wToSIQJ2o_8.mp4/wToSIQJ2o_8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wToSIQJ2o_8.mp4/wToSIQJ2o_8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wToSIQJ2o_8.m3u8/wToSIQJ2o_8.m3u8"}, "slug": "parametric-equations-2", "video_id": "wToSIQJ2o_8", "youtube_id": "wToSIQJ2o_8", "readable_id": "parametric-equations-2"}, "TgDk06Qayxw": {"duration": 499, "path": "khan/math/geometry/cc-geometry-circles/area-inscribed-triangle/sss-to-show-a-radius-is-perpendicular-to-a-chord-that-it-bisects/", "keywords": "side, theorem, axiom, postulate", "id": "TgDk06Qayxw", "title": "SSS to show a radius is perpendicular to a chord that it bisects", "description": "More on the difference between a theorem and axiom. Proving a cool result using SSS", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TgDk06Qayxw.mp4/TgDk06Qayxw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TgDk06Qayxw.mp4/TgDk06Qayxw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TgDk06Qayxw.m3u8/TgDk06Qayxw.m3u8"}, "slug": "sss-to-show-a-radius-is-perpendicular-to-a-chord-that-it-bisects", "video_id": "TgDk06Qayxw", "youtube_id": "TgDk06Qayxw", "readable_id": "sss-to-show-a-radius-is-perpendicular-to-a-chord-that-it-bisects"}, "G6OoxGmJzuc": {"duration": 719, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-symmetric-and-skew-symmetric-matrices/", "keywords": "2010, IIT, JEE, Paper, Problem, 42, Symmetric, and, Skew-Symmetric, Matrices", "id": "G6OoxGmJzuc", "title": "IIT JEE symmetric and skew-symmetric matrices", "description": "2010 IIT JEE Paper 1 Problem 42 Symmetric and Skew-Symmetric Matrices", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/G6OoxGmJzuc.mp4/G6OoxGmJzuc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/G6OoxGmJzuc.mp4/G6OoxGmJzuc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/G6OoxGmJzuc.m3u8/G6OoxGmJzuc.m3u8"}, "slug": "iit-jee-symmetric-and-skew-symmetric-matrices", "video_id": "G6OoxGmJzuc", "youtube_id": "G6OoxGmJzuc", "readable_id": "iit-jee-symmetric-and-skew-symmetric-matrices"}, "fpq0eICjuSI": {"duration": 677, "path": "khan/science/organic-chemistry/aromatic-compounds/reactions-benzene/electrophilic-aromatic-substitution/", "keywords": "Electrophilic, Aromatic, Substitution, electrophile, base", "id": "fpq0eICjuSI", "title": "Electrophilic aromatic substitution", "description": "Electrophilic Aromatic Substitution", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fpq0eICjuSI.mp4/fpq0eICjuSI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fpq0eICjuSI.mp4/fpq0eICjuSI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fpq0eICjuSI.m3u8/fpq0eICjuSI.m3u8"}, "slug": "electrophilic-aromatic-substitution", "video_id": "fpq0eICjuSI", "youtube_id": "fpq0eICjuSI", "readable_id": "electrophilic-aromatic-substitution"}, "Xg8_iSkJpAE": {"duration": 614, "path": "khan/math/probability/statistics-inferential/anova/anova-3-hypothesis-test-with-f-statistic/", "keywords": "Analysis, of, Variance, -Hypothesis, Test, with, F-Statistic, (ANOVA), CC_7_SP_3, CC_7_SP_4", "id": "Xg8_iSkJpAE", "title": "ANOVA 3: Hypothesis test with F-statistic", "description": "Analysis of Variance 3 -Hypothesis Test with F-Statistic", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Xg8_iSkJpAE.mp4/Xg8_iSkJpAE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Xg8_iSkJpAE.mp4/Xg8_iSkJpAE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Xg8_iSkJpAE.m3u8/Xg8_iSkJpAE.m3u8"}, "slug": "anova-3-hypothesis-test-with-f-statistic", "video_id": "Xg8_iSkJpAE", "youtube_id": "Xg8_iSkJpAE", "readable_id": "anova-3-hypothesis-test-with-f-statistic"}, "FCMxA3m_Imc": {"duration": 143, "path": "khan/computing/computer-programming/programming/intro-to-programming/programming-intro/", "keywords": "javascript", "id": "FCMxA3m_Imc", "title": "What is Programming?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FCMxA3m_Imc.mp4/FCMxA3m_Imc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FCMxA3m_Imc.mp4/FCMxA3m_Imc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FCMxA3m_Imc.m3u8/FCMxA3m_Imc.m3u8"}, "slug": "programming-intro", "video_id": "FCMxA3m_Imc", "youtube_id": "FCMxA3m_Imc", "readable_id": "programming-intro"}, "GuaozMpFS3w": {"duration": 621, "path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/organic-hybridization-practice/", "keywords": "", "id": "GuaozMpFS3w", "title": "Organic hybridization practice", "description": "Examples of identifying hybridization and geometry for atoms in organic molecules.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GuaozMpFS3w.mp4/GuaozMpFS3w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GuaozMpFS3w.mp4/GuaozMpFS3w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GuaozMpFS3w.m3u8/GuaozMpFS3w.m3u8"}, "slug": "organic-hybridization-practice", "video_id": "GuaozMpFS3w", "youtube_id": "GuaozMpFS3w", "readable_id": "organic-hybridization-practice"}, "ewEorPD4kdA": {"duration": 339, "path": "khan/math/pre-algebra/order-of-operations/ditributive_property/distributive-property-example-1/", "keywords": "Distributive, Property", "id": "ewEorPD4kdA", "title": "Distributive property algebraic expressions", "description": "Here we have some algebraic expressions to which we need to apply the distributive property. Now we're beginning to see how useful this property can be!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ewEorPD4kdA.mp4/ewEorPD4kdA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ewEorPD4kdA.mp4/ewEorPD4kdA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ewEorPD4kdA.m3u8/ewEorPD4kdA.m3u8"}, "slug": "distributive-property-example-1", "video_id": "ewEorPD4kdA", "youtube_id": "ewEorPD4kdA", "readable_id": "distributive-property-example-1"}, "C5G2Js2_Ep4": {"duration": 327, "path": "khan/math/differential-calculus/derivative_applications/normal-tangent-line-eq/normal-line-equation/", "keywords": "", "id": "C5G2Js2_Ep4", "title": "Equation of normal line", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C5G2Js2_Ep4.mp4/C5G2Js2_Ep4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C5G2Js2_Ep4.mp4/C5G2Js2_Ep4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C5G2Js2_Ep4.m3u8/C5G2Js2_Ep4.m3u8"}, "slug": "normal-line-equation", "video_id": "C5G2Js2_Ep4", "youtube_id": "C5G2Js2_Ep4", "readable_id": "normal-line-equation"}, "Pb04ntcDJcQ": {"duration": 729, "path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/exact-equations-example-1/", "keywords": "exact, differential, equations", "id": "Pb04ntcDJcQ", "title": "Exact equations example 1", "description": "First example of solving an exact differential equation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Pb04ntcDJcQ.mp4/Pb04ntcDJcQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Pb04ntcDJcQ.mp4/Pb04ntcDJcQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Pb04ntcDJcQ.m3u8/Pb04ntcDJcQ.m3u8"}, "slug": "exact-equations-example-1", "video_id": "Pb04ntcDJcQ", "youtube_id": "Pb04ntcDJcQ", "readable_id": "exact-equations-example-1"}, "_0YdFG17fQc": {"duration": 351, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/quarton/pieta-villeneuve/", "keywords": "", "id": "_0YdFG17fQc", "title": "Enguerrand Quarton(?), Piet\u00e0 of Villeneuve-l\u00e8s-Avignon", "description": "Enguerrand Quarton(?), Piet\u00e0 of Villeneuve-l\u00e8s-Avignon, c. 1455, oil on wood, 163 x 219 cm (Mus\u00e9e du Louvre)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_0YdFG17fQc.mp4/_0YdFG17fQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_0YdFG17fQc.mp4/_0YdFG17fQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_0YdFG17fQc.m3u8/_0YdFG17fQc.m3u8"}, "slug": "pieta-villeneuve", "video_id": "_0YdFG17fQc", "youtube_id": "_0YdFG17fQc", "readable_id": "pieta-villeneuve"}, "GMjwjXKt0SE": {"duration": 438, "path": "khan/college-admissions/paying-for-college/financial-aid-packages/financial-aid-package-example-part-2/", "keywords": "", "id": "GMjwjXKt0SE", "title": "Financial aid package example: Part 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GMjwjXKt0SE.mp4/GMjwjXKt0SE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GMjwjXKt0SE.mp4/GMjwjXKt0SE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GMjwjXKt0SE.m3u8/GMjwjXKt0SE.m3u8"}, "slug": "financial-aid-package-example-part-2", "video_id": "GMjwjXKt0SE", "youtube_id": "GMjwjXKt0SE", "readable_id": "financial-aid-package-example-part-2"}, "L3SIooVHV8E": {"duration": 530, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/the-pergamon-altar-c-200-150-b-c-e/", "keywords": "Smarthistory, Ancient greek art, Athena, Zeus, Gigantomachy, Berlin, Pergamon Museum, Hellenistic, Khan Academy, art history, Google Art Project, OER", "id": "L3SIooVHV8E", "title": "Great Altar of Zeus and Athena at Pergamon", "description": "The Pergamon Altar, c. 200-150 B.C.E., 35.64 x 33.4 meters, Hellenistic Period (Pergamon Museum, Berlin). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L3SIooVHV8E.mp4/L3SIooVHV8E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L3SIooVHV8E.mp4/L3SIooVHV8E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L3SIooVHV8E.m3u8/L3SIooVHV8E.m3u8"}, "slug": "the-pergamon-altar-c-200-150-b-c-e", "video_id": "L3SIooVHV8E", "youtube_id": "L3SIooVHV8E", "readable_id": "the-pergamon-altar-c-200-150-b-c-e"}, "1q06qHX1K-I": {"duration": 305, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/heart-failure-treatment-devices-and-surgery/", "keywords": "", "id": "1q06qHX1K-I", "title": "Heart failure treatment - Devices and surgery", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1q06qHX1K-I.mp4/1q06qHX1K-I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1q06qHX1K-I.mp4/1q06qHX1K-I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1q06qHX1K-I.m3u8/1q06qHX1K-I.m3u8"}, "slug": "heart-failure-treatment-devices-and-surgery", "video_id": "1q06qHX1K-I", "youtube_id": "1q06qHX1K-I", "readable_id": "heart-failure-treatment-devices-and-surgery"}, "KMMAL3v0lA0": {"duration": 284, "path": "khan/humanities/history/euro-hist/world-war-i-tutorial/alliances-leading-to-world-war-i/", "keywords": "", "id": "KMMAL3v0lA0", "title": "Alliances leading to World War I", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KMMAL3v0lA0.mp4/KMMAL3v0lA0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KMMAL3v0lA0.mp4/KMMAL3v0lA0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KMMAL3v0lA0.m3u8/KMMAL3v0lA0.m3u8"}, "slug": "alliances-leading-to-world-war-i", "video_id": "KMMAL3v0lA0", "youtube_id": "KMMAL3v0lA0", "readable_id": "alliances-leading-to-world-war-i"}, "J2Qz-7ZWDAE": {"duration": 252, "path": "khan/math/geometry/intro_euclid/specifying-planes-in-three-dimensions/", "keywords": "", "id": "J2Qz-7ZWDAE", "title": "Specifying planes in three dimensions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J2Qz-7ZWDAE.mp4/J2Qz-7ZWDAE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J2Qz-7ZWDAE.mp4/J2Qz-7ZWDAE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J2Qz-7ZWDAE.m3u8/J2Qz-7ZWDAE.m3u8"}, "slug": "specifying-planes-in-three-dimensions", "video_id": "J2Qz-7ZWDAE", "youtube_id": "J2Qz-7ZWDAE", "readable_id": "specifying-planes-in-three-dimensions"}, "SWbis2zWIvo": {"duration": 928, "path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/linear-algebra-coordinates-with-respect-to-orthonormal-bases/", "keywords": "orthonormal, coordinates", "id": "SWbis2zWIvo", "title": "Coordinates with respect to orthonormal bases", "description": "Seeing that orthonormal bases make for good coordinate systems", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SWbis2zWIvo.mp4/SWbis2zWIvo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SWbis2zWIvo.mp4/SWbis2zWIvo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SWbis2zWIvo.m3u8/SWbis2zWIvo.m3u8"}, "slug": "linear-algebra-coordinates-with-respect-to-orthonormal-bases", "video_id": "SWbis2zWIvo", "youtube_id": "SWbis2zWIvo", "readable_id": "linear-algebra-coordinates-with-respect-to-orthonormal-bases"}, "hYzN0w8FatU": {"duration": 148, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/severe-contango-generally-bearish/", "keywords": "contango, backwardation, finance, commodities", "id": "hYzN0w8FatU", "title": "Severe contango generally bearish", "description": "Thinking about why a severe contango could be bearish", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hYzN0w8FatU.mp4/hYzN0w8FatU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hYzN0w8FatU.mp4/hYzN0w8FatU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hYzN0w8FatU.m3u8/hYzN0w8FatU.m3u8"}, "slug": "severe-contango-generally-bearish", "video_id": "hYzN0w8FatU", "youtube_id": "hYzN0w8FatU", "readable_id": "severe-contango-generally-bearish"}, "n_4UNkeqk8s": {"duration": 171, "path": "khan/humanities/monarchy-enlightenment/neo-classicism/family/", "keywords": "death, drawing, family, paper, politics, Europe", "id": "n_4UNkeqk8s", "title": "David, Study for The Lictors Bringing Brutus the Bodies of his Sons", "description": "Met curator Perrin Stein on subjectivity in Jacques-Louis David\u2019s Study for The Lictors Bringing Brutus the Bodies of his Sons, 1787.\n\nThis sheet is a compositional study for The Lictors Bringing Brutus the Bodies of his Sons (Mus\u00e9e du Louvre, Paris), painted by David on the eve of the French Revolution and exhibited shortly after the Fall of the Bastille. As with many of his iconic Neoclassical canvases, the subject was drawn from Roman history but found great resonance in the context of contemporary events. The canvas depicts an episode from the life of Lucius Junius Brutus, who put to an end the brutal r\u00e9gime of Tarquin, Rome\u2019s last king, and established the first Roman Empire, only to later find his two sons embroiled in a royalist conspiracy. True to his political convictions, Brutus condemned his sons to death. The novelty of David\u2019s painting is its focus, not on the executions, but on the wrenching domestic aftermath.\u00a0David\u2019s Neoclassical style is fully formed here and can be seen in the clean geometry of the architectural setting, the arrangement of the figures in a relief-like plane, the linear treatment of the forms, and the cool monochrome palette. The poses of the main figures, from the brooding Brutus cast in shadow at the left, to his anguished wife and daughters to the right, as well as the furniture and accessories, are all based on antiquities copied by the artist while he was a student in Rome.\n\nView this work on metmuseum.org.\u00a0\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n_4UNkeqk8s.mp4/n_4UNkeqk8s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n_4UNkeqk8s.mp4/n_4UNkeqk8s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n_4UNkeqk8s.m3u8/n_4UNkeqk8s.m3u8"}, "slug": "family", "video_id": "n_4UNkeqk8s", "youtube_id": "n_4UNkeqk8s", "readable_id": "family"}, "_-I3HdmyYfE": {"duration": 475, "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-preparation-alkynes/alkyne-acidity-and-alkylation/", "keywords": "", "id": "_-I3HdmyYfE", "title": "Alkyne acidity and alkylation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_-I3HdmyYfE.mp4/_-I3HdmyYfE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_-I3HdmyYfE.mp4/_-I3HdmyYfE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_-I3HdmyYfE.m3u8/_-I3HdmyYfE.m3u8"}, "slug": "alkyne-acidity-and-alkylation", "video_id": "_-I3HdmyYfE", "youtube_id": "_-I3HdmyYfE", "readable_id": "alkyne-acidity-and-alkylation"}, "9hryH94KFJA": {"duration": 553, "path": "khan/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/equations-of-parallel-and-perpendicular-lines/", "keywords": "Equations, of, Parallel, and, Perpendicular, Lines", "id": "9hryH94KFJA", "title": "Equations of parallel and perpendicular lines", "description": "Equations of Parallel and Perpendicular Lines", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9hryH94KFJA.mp4/9hryH94KFJA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9hryH94KFJA.mp4/9hryH94KFJA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9hryH94KFJA.m3u8/9hryH94KFJA.m3u8"}, "slug": "equations-of-parallel-and-perpendicular-lines", "video_id": "9hryH94KFJA", "youtube_id": "9hryH94KFJA", "readable_id": "equations-of-parallel-and-perpendicular-lines"}, "M7yd8F3eay4": {"duration": 251, "path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/paul-klee-twittering-machine-1922/", "keywords": "Paul Klee, Twittering Machine, Dada, Swiss art, Smarthistory, art history, modern art, 20th century art", "id": "M7yd8F3eay4", "title": "Klee, Twittering Machine", "description": "Paul Klee, Twittering Machine (Die Zwitscher-Maschine), 1922, 25 1/4 x 19\" watercolor,\nink, and gouache on paper (MoMA)\n\nSpeakers: Dr. Juliana Kreinik and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M7yd8F3eay4.mp4/M7yd8F3eay4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M7yd8F3eay4.mp4/M7yd8F3eay4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M7yd8F3eay4.m3u8/M7yd8F3eay4.m3u8"}, "slug": "paul-klee-twittering-machine-1922", "video_id": "M7yd8F3eay4", "youtube_id": "M7yd8F3eay4", "readable_id": "paul-klee-twittering-machine-1922"}, "uY2ZOsCnXIA": {"duration": 992, "path": "khan/science/biology/human-biology/muscles/anatomy-of-a-muscle-cell/", "keywords": "muscle, anatomy", "id": "uY2ZOsCnXIA", "title": "Anatomy of a skeletal muscle fiber", "description": "Understanding the structure of a muscle fiber", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uY2ZOsCnXIA.mp4/uY2ZOsCnXIA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uY2ZOsCnXIA.mp4/uY2ZOsCnXIA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uY2ZOsCnXIA.m3u8/uY2ZOsCnXIA.m3u8"}, "slug": "anatomy-of-a-muscle-cell", "video_id": "uY2ZOsCnXIA", "youtube_id": "uY2ZOsCnXIA", "readable_id": "anatomy-of-a-muscle-cell"}, "POrFhETplGs": {"duration": 27, "path": "khan/science/discoveries-projects/discoveries/electromagnet/electromagnetic-field-above-vs-below/", "keywords": "electromagnetism", "id": "POrFhETplGs", "title": "Electromagnetic field (above vs. below)", "description": "Testing the direction of force when the current carrying wire is above vs. below a compass. What does this tell us?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/POrFhETplGs.mp4/POrFhETplGs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/POrFhETplGs.mp4/POrFhETplGs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/POrFhETplGs.m3u8/POrFhETplGs.m3u8"}, "slug": "electromagnetic-field-above-vs-below", "video_id": "POrFhETplGs", "youtube_id": "POrFhETplGs", "readable_id": "electromagnetic-field-above-vs-below"}, "kFD6hzLseVs": {"duration": 587, "path": "khan/test-prep/mcat/chemical-processes/stereochemistry/rs-system-new/", "keywords": "RS system,configuration,stereochemistry,chiral center configuration", "id": "kFD6hzLseVs", "title": "R,S system", "description": "How to assign the configuration of a chirality center using the R,S system", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kFD6hzLseVs.mp4/kFD6hzLseVs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kFD6hzLseVs.mp4/kFD6hzLseVs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kFD6hzLseVs.m3u8/kFD6hzLseVs.m3u8"}, "slug": "rs-system-new", "video_id": "kFD6hzLseVs", "youtube_id": "kFD6hzLseVs", "readable_id": "rs-system-new"}, "QefQbkN2CNE": {"duration": 234, "path": "khan/partner-content/wi-phi/the-history-of-philosophy/chatelet-part-1/", "keywords": "", "id": "QefQbkN2CNE", "title": "Early Modern: \u00c9milie du Ch\u00e2telet, Part 1", "description": "In this first of two videos, Andrew Janiak introduces Emilie Du Chatelet, a French philosopher, and her contribution to the debate about the principle of sufficient reason. This video is a part of a series of videos coming from Project Vox (Duke), a project recovering the lost voices of women philosophers.\n\nSpeaker: Dr. Andrew Janiak,\u00a0Creed C. Black Associate Professor of Philosophy, Duke University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QefQbkN2CNE.mp4/QefQbkN2CNE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QefQbkN2CNE.mp4/QefQbkN2CNE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QefQbkN2CNE.m3u8/QefQbkN2CNE.m3u8"}, "slug": "chatelet-part-1", "video_id": "QefQbkN2CNE", "youtube_id": "QefQbkN2CNE", "readable_id": "chatelet-part-1"}, "s91Dptx52GU": {"duration": 430, "path": "khan/partner-content/cas-biodiversity/biodiversity-levels/biodiversity-tree-of-life/understanding-the-past-to-preserve-the-future/", "keywords": "", "id": "s91Dptx52GU", "title": "Understanding the past to preserve the future", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/s91Dptx52GU.mp4/s91Dptx52GU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/s91Dptx52GU.mp4/s91Dptx52GU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/s91Dptx52GU.m3u8/s91Dptx52GU.m3u8"}, "slug": "understanding-the-past-to-preserve-the-future", "video_id": "s91Dptx52GU", "youtube_id": "s91Dptx52GU", "readable_id": "understanding-the-past-to-preserve-the-future"}, "0jK5x_hsTvY": {"duration": 283, "path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/absolute-threshold-of-sensation/", "keywords": "", "id": "0jK5x_hsTvY", "title": "Absolute threshold of sensation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0jK5x_hsTvY.mp4/0jK5x_hsTvY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0jK5x_hsTvY.mp4/0jK5x_hsTvY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0jK5x_hsTvY.m3u8/0jK5x_hsTvY.m3u8"}, "slug": "absolute-threshold-of-sensation", "video_id": "0jK5x_hsTvY", "youtube_id": "0jK5x_hsTvY", "readable_id": "absolute-threshold-of-sensation"}, "gezAvbjMiBU": {"duration": 504, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/malaria-rn/diagnosing-malaria/", "keywords": "Malaria (Disease Or Medical Condition),Diagnosis Of Malaria,Health (Industry)", "id": "gezAvbjMiBU", "title": "Diagnosing malaria", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gezAvbjMiBU.mp4/gezAvbjMiBU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gezAvbjMiBU.mp4/gezAvbjMiBU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gezAvbjMiBU.m3u8/gezAvbjMiBU.m3u8"}, "slug": "diagnosing-malaria", "video_id": "gezAvbjMiBU", "youtube_id": "gezAvbjMiBU", "readable_id": "diagnosing-malaria"}, "8RSTQl0bQuw": {"duration": 258, "path": "khan/math/probability/regression/regression-correlation/proof-part-4-minimizing-squared-error-to-regression-line/", "keywords": "Proof, (Part, 4), Minimizing, Squared, Error, to, Regression, Line, CC_8_SP_2, CC_8_SP_3", "id": "8RSTQl0bQuw", "title": "Proof (part 4) minimizing squared error to regression line", "description": "Proof (Part 4) Minimizing Squared Error to Regression Line", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8RSTQl0bQuw.mp4/8RSTQl0bQuw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8RSTQl0bQuw.mp4/8RSTQl0bQuw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8RSTQl0bQuw.m3u8/8RSTQl0bQuw.m3u8"}, "slug": "proof-part-4-minimizing-squared-error-to-regression-line", "video_id": "8RSTQl0bQuw", "youtube_id": "8RSTQl0bQuw", "readable_id": "proof-part-4-minimizing-squared-error-to-regression-line"}, "i-Rb4_n929k": {"duration": 335, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/evaluating-integral-for-washer-method-around-vertical-line/", "keywords": "", "id": "i-Rb4_n929k", "title": "Evaluating integral for washer method around vertical line", "description": "Evaluating integral set up in the last video using washer method.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i-Rb4_n929k.mp4/i-Rb4_n929k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i-Rb4_n929k.mp4/i-Rb4_n929k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i-Rb4_n929k.m3u8/i-Rb4_n929k.m3u8"}, "slug": "evaluating-integral-for-washer-method-around-vertical-line", "video_id": "i-Rb4_n929k", "youtube_id": "i-Rb4_n929k", "readable_id": "evaluating-integral-for-washer-method-around-vertical-line"}, "KL0i1RSnpfI": {"duration": 349, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/how-we-know-about-the-earth-s-core/", "keywords": "geology, seismology", "id": "KL0i1RSnpfI", "title": "How we know about the earth's core", "description": "S-wave shadow and P-wave detection patterns give us information about the core", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KL0i1RSnpfI.mp4/KL0i1RSnpfI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KL0i1RSnpfI.mp4/KL0i1RSnpfI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KL0i1RSnpfI.m3u8/KL0i1RSnpfI.m3u8"}, "slug": "how-we-know-about-the-earth-s-core", "video_id": "KL0i1RSnpfI", "youtube_id": "KL0i1RSnpfI", "readable_id": "how-we-know-about-the-earth-s-core"}, "Toss6Hzf5n0": {"duration": 374, "path": "khan/humanities/history/euro-hist/wo/1940-axis-gains-momentum-in-world-war-ii/", "keywords": "", "id": "Toss6Hzf5n0", "title": "1940 - Axis gains momentum in World War II", "description": "In this second video giving an overview of World War II, we see Germany and the Axis powers only continue to gain momentum in 1940.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Toss6Hzf5n0.mp4/Toss6Hzf5n0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Toss6Hzf5n0.mp4/Toss6Hzf5n0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Toss6Hzf5n0.m3u8/Toss6Hzf5n0.m3u8"}, "slug": "1940-axis-gains-momentum-in-world-war-ii", "video_id": "Toss6Hzf5n0", "youtube_id": "Toss6Hzf5n0", "readable_id": "1940-axis-gains-momentum-in-world-war-ii"}, "oqCfqIcbE10": {"duration": 333, "path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-example-3/", "keywords": "", "id": "oqCfqIcbE10", "title": "u-substitution example 3", "description": "Manipulating the expression to make u-substitution a little more obvious.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oqCfqIcbE10.mp4/oqCfqIcbE10.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oqCfqIcbE10.mp4/oqCfqIcbE10.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oqCfqIcbE10.m3u8/oqCfqIcbE10.m3u8"}, "slug": "u-substitution-example-3", "video_id": "oqCfqIcbE10", "youtube_id": "oqCfqIcbE10", "readable_id": "u-substitution-example-3"}, "VZB1P4uNFAw": {"duration": 256, "path": "khan/partner-content/big-history-project/expansion-interconnection/other-materials8/bhp-recreating-pangaea/", "keywords": "", "id": "VZB1P4uNFAw", "title": "Re-Creating Pangaea", "description": "When Columbus sailed to the Americas, there was a wave of interconnection that rippled across the world. Unfortunately, this interconnection Included deadly microorganisms.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VZB1P4uNFAw.mp4/VZB1P4uNFAw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VZB1P4uNFAw.mp4/VZB1P4uNFAw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VZB1P4uNFAw.m3u8/VZB1P4uNFAw.m3u8"}, "slug": "bhp-recreating-pangaea", "video_id": "VZB1P4uNFAw", "youtube_id": "VZB1P4uNFAw", "readable_id": "bhp-recreating-pangaea"}, "Mioqyv_IW3E": {"duration": 224, "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/basic-cash-flow-statement/", "keywords": "cash, flow, cashflow, income, statement, balance, sheet, financial, accounting", "id": "Mioqyv_IW3E", "title": "Basic cash flow statement", "description": "Using a cash flow statement to reconcile net income with change in cash", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mioqyv_IW3E.mp4/Mioqyv_IW3E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mioqyv_IW3E.mp4/Mioqyv_IW3E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mioqyv_IW3E.m3u8/Mioqyv_IW3E.m3u8"}, "slug": "basic-cash-flow-statement", "video_id": "Mioqyv_IW3E", "youtube_id": "Mioqyv_IW3E", "readable_id": "basic-cash-flow-statement"}, "PLjyj1FJqig": {"duration": 231, "path": "khan/economics-finance-domain/core-finance/derivative-securities/interest-rate-swaps-tut/interest-rate-swap-1/", "keywords": "LIBOR, fixed, variable, rate, interest", "id": "PLjyj1FJqig", "title": "Interest rate swap 1", "description": "The basic dynamic of an interest rate swap", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PLjyj1FJqig.mp4/PLjyj1FJqig.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PLjyj1FJqig.mp4/PLjyj1FJqig.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PLjyj1FJqig.m3u8/PLjyj1FJqig.m3u8"}, "slug": "interest-rate-swap-1", "video_id": "PLjyj1FJqig", "youtube_id": "PLjyj1FJqig", "readable_id": "interest-rate-swap-1"}, "_saunfB-wCQ": {"duration": 692, "path": "khan/science/health-and-medicine/lab-values/molarity-vs-osmolarity/", "keywords": "", "id": "_saunfB-wCQ", "title": "Molarity vs. osmolarity", "description": "Learn about osmoles and figure out how to calculate osmolarity really easily. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_saunfB-wCQ.mp4/_saunfB-wCQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_saunfB-wCQ.mp4/_saunfB-wCQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_saunfB-wCQ.m3u8/_saunfB-wCQ.m3u8"}, "slug": "molarity-vs-osmolarity", "video_id": "_saunfB-wCQ", "youtube_id": "_saunfB-wCQ", "readable_id": "molarity-vs-osmolarity"}, "NYd6wzYkQIM": {"duration": 800, "path": "khan/math/probability/statistics-inferential/sampling_distribution/sampling-distribution-of-the-sample-mean-2/", "keywords": "Central, Limit, Theorem, Sampling, Distribution, Sample, Mean, CC_6_SP_2, CC_6_SP_4, CC_6_SP_5_c, CC_6_SP_5_d, CC_7_SP_1", "id": "NYd6wzYkQIM", "title": "Sampling distribution of the sample mean 2", "description": "More on the Central Limit Theorem and the Sampling Distribution of the Sample Mean", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NYd6wzYkQIM.mp4/NYd6wzYkQIM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NYd6wzYkQIM.mp4/NYd6wzYkQIM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NYd6wzYkQIM.m3u8/NYd6wzYkQIM.m3u8"}, "slug": "sampling-distribution-of-the-sample-mean-2", "video_id": "NYd6wzYkQIM", "youtube_id": "NYd6wzYkQIM", "readable_id": "sampling-distribution-of-the-sample-mean-2"}, "mz2eVthmNn4": {"duration": 81, "path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-aug-17-/", "keywords": "", "id": "mz2eVthmNn4", "title": "Systems check", "description": "Aug 9th 2012)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mz2eVthmNn4.mp4/mz2eVthmNn4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mz2eVthmNn4.mp4/mz2eVthmNn4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mz2eVthmNn4.m3u8/mz2eVthmNn4.m3u8"}, "slug": "curiosity-rover-report-aug-17-", "video_id": "mz2eVthmNn4", "youtube_id": "mz2eVthmNn4", "readable_id": "curiosity-rover-report-aug-17-"}, "Ngv0Be9NxAw": {"duration": 680, "path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/cross-elasticity-of-demand/", "keywords": "cross, elasticity, economics", "id": "Ngv0Be9NxAw", "title": "Cross elasticity of demand", "description": "Price of one good impacting quantity demanded of another", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ngv0Be9NxAw.mp4/Ngv0Be9NxAw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ngv0Be9NxAw.mp4/Ngv0Be9NxAw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ngv0Be9NxAw.m3u8/Ngv0Be9NxAw.m3u8"}, "slug": "cross-elasticity-of-demand", "video_id": "Ngv0Be9NxAw", "youtube_id": "Ngv0Be9NxAw", "readable_id": "cross-elasticity-of-demand"}, "T4iRq8_ZmAA": {"duration": 602, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zees-motor-controller/", "keywords": "Motor controller, L297, Bit-zee bot, motor driver,", "id": "T4iRq8_ZmAA", "title": "Motor controller", "description": "In this video we take you step by step through building the L298 Motor driver. This controller allows you to use your Arduino to control the hair dryer motors used to move the Bit-zee bot.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T4iRq8_ZmAA.mp4/T4iRq8_ZmAA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T4iRq8_ZmAA.mp4/T4iRq8_ZmAA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T4iRq8_ZmAA.m3u8/T4iRq8_ZmAA.m3u8"}, "slug": "bit-zees-motor-controller", "video_id": "T4iRq8_ZmAA", "youtube_id": "T4iRq8_ZmAA", "readable_id": "bit-zees-motor-controller"}, "CFygKiTB-4A": {"duration": 635, "path": "khan/science/physics/linear-momentum/momentum-tutorial/2-dimensional-momentum-problem/", "keywords": "momentum, vectors, vector, physics, dimensions", "id": "CFygKiTB-4A", "title": "2-dimensional momentum problem", "description": "An example of conservation of momentum in two dimensions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CFygKiTB-4A.mp4/CFygKiTB-4A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CFygKiTB-4A.mp4/CFygKiTB-4A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CFygKiTB-4A.m3u8/CFygKiTB-4A.m3u8"}, "slug": "2-dimensional-momentum-problem", "video_id": "CFygKiTB-4A", "youtube_id": "CFygKiTB-4A", "readable_id": "2-dimensional-momentum-problem"}, "nh3_IGxHA5A": {"duration": 424, "path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphing-a-quadratic-function/", "keywords": "u17_l2_t2_we2, Graphing, Quadratic, Function , parabola", "id": "nh3_IGxHA5A", "title": "Graphing a parabola with a table of values", "description": "Graphing a parabola with a table of values", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nh3_IGxHA5A.mp4/nh3_IGxHA5A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nh3_IGxHA5A.mp4/nh3_IGxHA5A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nh3_IGxHA5A.m3u8/nh3_IGxHA5A.m3u8"}, "slug": "graphing-a-quadratic-function", "video_id": "nh3_IGxHA5A", "youtube_id": "nh3_IGxHA5A", "readable_id": "graphing-a-quadratic-function"}, "YNriRslOk9A": {"duration": 1160, "path": "khan/science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry/limiting-reactant-example-problem-1/", "keywords": "Limiting, Reactant, Example, Problem", "id": "YNriRslOk9A", "title": "Limiting reactant example problem 1", "description": "Limiting Reactant Example Problem 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YNriRslOk9A.mp4/YNriRslOk9A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YNriRslOk9A.mp4/YNriRslOk9A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YNriRslOk9A.m3u8/YNriRslOk9A.m3u8"}, "slug": "limiting-reactant-example-problem-1", "video_id": "YNriRslOk9A", "youtube_id": "YNriRslOk9A", "readable_id": "limiting-reactant-example-problem-1"}, "nUXDltQfqSA": {"duration": 426, "path": "khan/humanities/art-history-basics/artists-materials-techniques/printmaking/moma-lithography-process/", "keywords": "", "id": "nUXDltQfqSA", "title": "Lithography process", "description": "Learn how the lithographic process maintains the subtle hand of the artist. Did you know that MoMA offers studio courses online? To learn more, check out the list of online course offerings.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nUXDltQfqSA.mp4/nUXDltQfqSA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nUXDltQfqSA.mp4/nUXDltQfqSA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nUXDltQfqSA.m3u8/nUXDltQfqSA.m3u8"}, "slug": "moma-lithography-process", "video_id": "nUXDltQfqSA", "youtube_id": "nUXDltQfqSA", "readable_id": "moma-lithography-process"}, "1jWJQkxZiiU": {"duration": 96, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-10/", "keywords": "", "id": "1jWJQkxZiiU", "title": "10 Adding numbers in different representations", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1jWJQkxZiiU.mp4/1jWJQkxZiiU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1jWJQkxZiiU.mp4/1jWJQkxZiiU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1jWJQkxZiiU.m3u8/1jWJQkxZiiU.m3u8"}, "slug": "sat-2010-may-9-10", "video_id": "1jWJQkxZiiU", "youtube_id": "1jWJQkxZiiU", "readable_id": "sat-2010-may-9-10"}, "zIfQFH79Kkg": {"duration": 198, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s6-harder/", "keywords": "", "id": "zIfQFH79Kkg", "title": "Congruence and similarity \u2014 Harder example", "description": "Watch Sal work through a harder Congruence and similarity problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zIfQFH79Kkg.mp4/zIfQFH79Kkg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zIfQFH79Kkg.mp4/zIfQFH79Kkg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zIfQFH79Kkg.m3u8/zIfQFH79Kkg.m3u8"}, "slug": "sat-math-s6-harder", "video_id": "zIfQFH79Kkg", "youtube_id": "zIfQFH79Kkg", "readable_id": "sat-math-s6-harder"}, "mVkAvYhgW8c": {"duration": 296, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/vermeer-the-art-of-painting/", "keywords": "", "id": "mVkAvYhgW8c", "title": "Johannes Vermeer, The Art of Painting", "description": "Johannes Vermeer, The Art of Painting, 1666-69, oil on canvas, 130\u00a0x 110\u00a0cm (Kunsthistorisches Museum, Vienna).\u00a0Speakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mVkAvYhgW8c.mp4/mVkAvYhgW8c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mVkAvYhgW8c.mp4/mVkAvYhgW8c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mVkAvYhgW8c.m3u8/mVkAvYhgW8c.m3u8"}, "slug": "vermeer-the-art-of-painting", "video_id": "mVkAvYhgW8c", "youtube_id": "mVkAvYhgW8c", "readable_id": "vermeer-the-art-of-painting"}, "yenSUBmGrdU": {"duration": 291, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/el-salahi/", "keywords": "Tate", "id": "yenSUBmGrdU", "title": "Ibrahim El-Salahi", "description": "This video brought to you by Tate.org.uk\n\nA major figure in Arab and African modernism, artist Ibrahim El-Salahi discusses his work Reborn Sounds of Childhood Dreams I\u00a0(1962-3), a large-scale oil painting at Tate. In 2013, Tate Modern presented the UK's first major exhibition of El-Salahi's work, bringing together 100 pieces from across more than five decades of his international career. Take a look at some highlights from one of the most significant figures in African art and learn more about how he belongs to a broader, global art history as well.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yenSUBmGrdU.mp4/yenSUBmGrdU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yenSUBmGrdU.mp4/yenSUBmGrdU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yenSUBmGrdU.m3u8/yenSUBmGrdU.m3u8"}, "slug": "el-salahi", "video_id": "yenSUBmGrdU", "youtube_id": "yenSUBmGrdU", "readable_id": "el-salahi"}, "khRX1Oo93AY": {"duration": 396, "path": "khan/test-prep/mcat/social-inequality/social-class/upward-and-downward-mobility-meritocracy/", "keywords": "", "id": "khRX1Oo93AY", "title": "Upward and downward mobility, meritocracy", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/khRX1Oo93AY.mp4/khRX1Oo93AY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/khRX1Oo93AY.mp4/khRX1Oo93AY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/khRX1Oo93AY.m3u8/khRX1Oo93AY.m3u8"}, "slug": "upward-and-downward-mobility-meritocracy", "video_id": "khRX1Oo93AY", "youtube_id": "khRX1Oo93AY", "readable_id": "upward-and-downward-mobility-meritocracy"}, "8G5WFKUzvA8": {"duration": 354, "path": "khan/test-prep/mcat/behavior/psychological-disorders/somatic-symptom-disorder-and-other-disorders/", "keywords": "Somatoform Disorder (Disease Or Medical Condition),Health (Industry),Mental Illness (Disease Or Medical Condition)", "id": "8G5WFKUzvA8", "title": "Somatic symptom disorder and other disorders", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8G5WFKUzvA8.mp4/8G5WFKUzvA8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8G5WFKUzvA8.mp4/8G5WFKUzvA8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8G5WFKUzvA8.m3u8/8G5WFKUzvA8.m3u8"}, "slug": "somatic-symptom-disorder-and-other-disorders", "video_id": "8G5WFKUzvA8", "youtube_id": "8G5WFKUzvA8", "readable_id": "somatic-symptom-disorder-and-other-disorders"}, "jlID_mIJXi4": {"duration": 251, "path": "khan/math/algebra2/manipulating-functions/composing-functions/evaluating-composite-functions-example-1/", "keywords": "", "id": "jlID_mIJXi4", "title": "How to evaluate a composite function given the formulas of the composed functions (example)", "description": "Sal solves the following problem: Given that h(x)=3x and g(t)=-2t-2-h(t), find h(g(8)).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jlID_mIJXi4.mp4/jlID_mIJXi4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jlID_mIJXi4.mp4/jlID_mIJXi4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jlID_mIJXi4.m3u8/jlID_mIJXi4.m3u8"}, "slug": "evaluating-composite-functions-example-1", "video_id": "jlID_mIJXi4", "youtube_id": "jlID_mIJXi4", "readable_id": "evaluating-composite-functions-example-1"}, "eEUvRrhmcxM": {"duration": 1047, "path": "khan/science/biology/her/heredity-and-genetics/introduction-to-heredity/", "keywords": "biology, heredity, genetics, genotype, phenotype, dominant, recessive", "id": "eEUvRrhmcxM", "title": "Introduction to heredity", "description": "Heredity and Classical Genetics. Dominant and recessive traits. Heterozygous and homozygous genotypes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eEUvRrhmcxM.mp4/eEUvRrhmcxM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eEUvRrhmcxM.mp4/eEUvRrhmcxM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eEUvRrhmcxM.m3u8/eEUvRrhmcxM.m3u8"}, "slug": "introduction-to-heredity", "video_id": "eEUvRrhmcxM", "youtube_id": "eEUvRrhmcxM", "readable_id": "introduction-to-heredity"}, "LinNW-GIlP0": {"duration": 298, "path": "khan/humanities/global-culture/global-art-architecture/wang-peng/", "keywords": "Tate", "id": "LinNW-GIlP0", "title": "Wang Peng: Performance as politics in China and beyond", "description": "This video brought to you by\u00a0Tate.org.uk\n\nChinese artist Wang Peng started out as an abstract painter before turning to installations\u2014at a time when installation and performance art was banned in China. And yet the artist flourished in what could be considered a hostile environment, using the restrictions imposed upon him to play with how far his art could go instead of simply giving in to the ban. In one piece, the artist and his fellow performers blocked the entrance to a gallery by building a wall of bricks in front of it. The next day, police tore down the wall in an ironic subversion, unwittingly taking part in the performance and symbolically opening the gallery back up.\nUnderpinning Wang Peng\u2019s work is a steadfast resolve to challenge the conventions and boundaries of art. \"Your love of art should never be affected by politics,\u201d he says. Do you think that an artist can be unaffected by politics but still engage with political and social issues?\n\nLearn more about Wang Peng's performance and politics here.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LinNW-GIlP0.mp4/LinNW-GIlP0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LinNW-GIlP0.mp4/LinNW-GIlP0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LinNW-GIlP0.m3u8/LinNW-GIlP0.m3u8"}, "slug": "wang-peng", "video_id": "LinNW-GIlP0", "youtube_id": "LinNW-GIlP0", "readable_id": "wang-peng"}, "naVFTNWVlQU": {"duration": 265, "path": "khan/math/algebra/quadratics/quadratics-square-root/order-of-steps-exercise-example/", "keywords": "", "id": "naVFTNWVlQU", "title": "Order of steps exercise example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/naVFTNWVlQU.mp4/naVFTNWVlQU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/naVFTNWVlQU.mp4/naVFTNWVlQU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/naVFTNWVlQU.m3u8/naVFTNWVlQU.m3u8"}, "slug": "order-of-steps-exercise-example", "video_id": "naVFTNWVlQU", "youtube_id": "naVFTNWVlQU", "readable_id": "order-of-steps-exercise-example"}, "ncgAfzRSJrI": {"duration": 359, "path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/andrea-pisano-reliefs-for-the-florence-campanile-c-1336/", "keywords": "campanile, florence, art, art history, smarthistory", "id": "ncgAfzRSJrI", "title": "Andrea Pisano's reliefs on the Campanile in Florence", "description": "Andrea Pisano, Reliefs for the Campanile in Florence, c. 1336\n\n\nSpeakers: David Drogin and Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ncgAfzRSJrI.mp4/ncgAfzRSJrI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ncgAfzRSJrI.mp4/ncgAfzRSJrI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ncgAfzRSJrI.m3u8/ncgAfzRSJrI.m3u8"}, "slug": "andrea-pisano-reliefs-for-the-florence-campanile-c-1336", "video_id": "ncgAfzRSJrI", "youtube_id": "ncgAfzRSJrI", "readable_id": "andrea-pisano-reliefs-for-the-florence-campanile-c-1336"}, "Nqts8zW8RxM": {"duration": 332, "path": "khan/math/algebra-basics/core-algebra-foundations/operations-with-decimals/dividing-decimals/", "keywords": "U03_L2_T2_we3, Dividing, Decimals, CC_5_NBT_7, CC_6_NS_3", "id": "Nqts8zW8RxM", "title": "Dividing by a multi-digit decimal", "description": "Let's do one more decimal division problem together but change it up. This is one with a decimal divisor and will require you to shift the decimal first.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Nqts8zW8RxM.mp4/Nqts8zW8RxM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Nqts8zW8RxM.mp4/Nqts8zW8RxM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Nqts8zW8RxM.m3u8/Nqts8zW8RxM.m3u8"}, "slug": "dividing-decimals", "video_id": "Nqts8zW8RxM", "youtube_id": "Nqts8zW8RxM", "readable_id": "dividing-decimals"}, "7HBDLYdyJnc": {"duration": 101, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/conventional-expression-harder/", "keywords": "education,online learning,learning,lessons", "id": "7HBDLYdyJnc", "title": "Writing: Conventional expression \u2014 Harder example", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing conventional expression.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7HBDLYdyJnc.mp4/7HBDLYdyJnc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7HBDLYdyJnc.mp4/7HBDLYdyJnc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7HBDLYdyJnc.m3u8/7HBDLYdyJnc.m3u8"}, "slug": "conventional-expression-harder", "video_id": "7HBDLYdyJnc", "youtube_id": "7HBDLYdyJnc", "readable_id": "conventional-expression-harder"}, "Y9FyokN7WlM": {"duration": 551, "path": "khan/partner-content/big-history-project/stars-and-elements/creation-complex-elements/bhp-what-did-stars-give-us/", "keywords": "", "id": "Y9FyokN7WlM", "title": "What Did Stars Give Us?", "description": "Aging and dying stars generate extremely hot temperatures, hot enough to create entirely new elements.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y9FyokN7WlM.mp4/Y9FyokN7WlM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y9FyokN7WlM.mp4/Y9FyokN7WlM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y9FyokN7WlM.m3u8/Y9FyokN7WlM.m3u8"}, "slug": "bhp-what-did-stars-give-us", "video_id": "Y9FyokN7WlM", "youtube_id": "Y9FyokN7WlM", "readable_id": "bhp-what-did-stars-give-us"}, "4AxZ-6MOznY": {"duration": 573, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/structure-of-the-earth/", "keywords": "geology, lithosphere, asthenosphere", "id": "4AxZ-6MOznY", "title": "Structure of the earth", "description": "Structure of the Earth - crust, mantle, core", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4AxZ-6MOznY.mp4/4AxZ-6MOznY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4AxZ-6MOznY.mp4/4AxZ-6MOznY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4AxZ-6MOznY.m3u8/4AxZ-6MOznY.m3u8"}, "slug": "structure-of-the-earth", "video_id": "4AxZ-6MOznY", "youtube_id": "4AxZ-6MOznY", "readable_id": "structure-of-the-earth"}, "SOQyiM6V3RQ": {"duration": 509, "path": "khan/science/biology/macromolecules/carbohydrates-and-sugars/hydrolysis/", "keywords": "education,online learning,learning,lessons,hydrolysis,chitin,Polysaccharide (Chemical Classification),starch,glycogen,cellulose", "id": "SOQyiM6V3RQ", "title": "Hydrolysis", "description": "How hydrolysis can break down polysaccharides (carbohydrates) like starch, cellulose, chitin and glycogen.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SOQyiM6V3RQ.mp4/SOQyiM6V3RQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SOQyiM6V3RQ.mp4/SOQyiM6V3RQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SOQyiM6V3RQ.m3u8/SOQyiM6V3RQ.m3u8"}, "slug": "hydrolysis", "video_id": "SOQyiM6V3RQ", "youtube_id": "SOQyiM6V3RQ", "readable_id": "hydrolysis"}, "8-ccnvn9DxI": {"duration": 855, "path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/formation-of-acetals/", "keywords": "", "id": "8-ccnvn9DxI", "title": "Formation of acetals", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8-ccnvn9DxI.mp4/8-ccnvn9DxI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8-ccnvn9DxI.mp4/8-ccnvn9DxI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8-ccnvn9DxI.m3u8/8-ccnvn9DxI.m3u8"}, "slug": "formation-of-acetals", "video_id": "8-ccnvn9DxI", "youtube_id": "8-ccnvn9DxI", "readable_id": "formation-of-acetals"}, "JAg8IrTs5K0": {"duration": 417, "path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/risk-factors-for-bipolar-disorder/", "keywords": "Bipolar Disorder (Disease Or Medical Condition),Health (Industry),Risk Factor", "id": "JAg8IrTs5K0", "title": "Risk factors for bipolar disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JAg8IrTs5K0.mp4/JAg8IrTs5K0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JAg8IrTs5K0.mp4/JAg8IrTs5K0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JAg8IrTs5K0.m3u8/JAg8IrTs5K0.m3u8"}, "slug": "risk-factors-for-bipolar-disorder", "video_id": "JAg8IrTs5K0", "youtube_id": "JAg8IrTs5K0", "readable_id": "risk-factors-for-bipolar-disorder"}, "cqK3uRoPtk0": {"duration": 408, "path": "khan/math/probability/random-variables-topic/random_variables_prob_dist/discrete-probability-distribution/", "keywords": "", "id": "cqK3uRoPtk0", "title": "Constructing a probability distribution for random variable", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cqK3uRoPtk0.mp4/cqK3uRoPtk0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cqK3uRoPtk0.mp4/cqK3uRoPtk0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cqK3uRoPtk0.m3u8/cqK3uRoPtk0.m3u8"}, "slug": "discrete-probability-distribution", "video_id": "cqK3uRoPtk0", "youtube_id": "cqK3uRoPtk0", "readable_id": "discrete-probability-distribution"}, "Y3ATc9he254": {"duration": 343, "path": "khan/science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas/liquid-water-denser-than-solid-water-ice/", "keywords": "education,online learning,learning,lessons,density,water,ice,floating", "id": "Y3ATc9he254", "title": "Liquid water denser than solid water (ice)", "description": "Water less dense as ice. Why lakes don't freeze solid.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y3ATc9he254.mp4/Y3ATc9he254.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y3ATc9he254.mp4/Y3ATc9he254.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y3ATc9he254.m3u8/Y3ATc9he254.m3u8"}, "slug": "liquid-water-denser-than-solid-water-ice", "video_id": "Y3ATc9he254", "youtube_id": "Y3ATc9he254", "readable_id": "liquid-water-denser-than-solid-water-ice"}, "Zps2uH8aWVU": {"duration": 310, "path": "khan/test-prep/mcat/biomolecules/dna-technology/southern-blot/", "keywords": "", "id": "Zps2uH8aWVU", "title": "Southern blot", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zps2uH8aWVU.mp4/Zps2uH8aWVU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zps2uH8aWVU.mp4/Zps2uH8aWVU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zps2uH8aWVU.m3u8/Zps2uH8aWVU.m3u8"}, "slug": "southern-blot", "video_id": "Zps2uH8aWVU", "youtube_id": "Zps2uH8aWVU", "readable_id": "southern-blot"}, "ascpn9AjCIk": {"duration": 207, "path": "khan/humanities/art-americas/us-art-19c/romanticism-us/fitz-henry-lane-owl-s-head-penobscot-bay-maine-1862/", "keywords": "GAP, Maine, American Painting, American Art, Fitz Henry Lane, Owl's Head, Penobscot Bay, 1862, Museum of Fine Arts, Boston, Khan Academy, smarthistory, art history, Google Art Project, OER, painting, landscape, ship, shore, calm, luminist", "id": "ascpn9AjCIk", "title": "Lane, Owl's Head, Penobscot Bay, Maine", "description": "Fitz Henry Lane, Owl's Head, Penobscot Bay, Maine, 1862, oil on canvas, 40 x 66.36 cm / 15-3/4 x 26-1/8 inches (Museum of Fine Arts, Boston)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ascpn9AjCIk.mp4/ascpn9AjCIk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ascpn9AjCIk.mp4/ascpn9AjCIk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ascpn9AjCIk.m3u8/ascpn9AjCIk.m3u8"}, "slug": "fitz-henry-lane-owl-s-head-penobscot-bay-maine-1862", "video_id": "ascpn9AjCIk", "youtube_id": "ascpn9AjCIk", "readable_id": "fitz-henry-lane-owl-s-head-penobscot-bay-maine-1862"}, "sMA116kzyK4": {"duration": 517, "path": "khan/science/health-and-medicine/current-issues-in-health-and-medicine/ebola-outbreak/r-nought-and-vaccine-coverage/", "keywords": "", "id": "sMA116kzyK4", "title": "R nought and vaccine coverage", "description": "Dr. Rishi Desai is a pediatric infectious disease physician and former epidemiologist with the Centers for Disease Control and Prevention (CDC)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sMA116kzyK4.mp4/sMA116kzyK4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sMA116kzyK4.mp4/sMA116kzyK4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sMA116kzyK4.m3u8/sMA116kzyK4.m3u8"}, "slug": "r-nought-and-vaccine-coverage", "video_id": "sMA116kzyK4", "youtube_id": "sMA116kzyK4", "readable_id": "r-nought-and-vaccine-coverage"}, "Ux2E6uhEVk0": {"duration": 215, "path": "khan/test-prep/mcat/society-and-culture/social-structures/symbolic-interactionism/", "keywords": "symbolic interactionism", "id": "Ux2E6uhEVk0", "title": "Symbolic interactionism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ux2E6uhEVk0.mp4/Ux2E6uhEVk0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ux2E6uhEVk0.mp4/Ux2E6uhEVk0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ux2E6uhEVk0.m3u8/Ux2E6uhEVk0.m3u8"}, "slug": "symbolic-interactionism", "video_id": "Ux2E6uhEVk0", "youtube_id": "Ux2E6uhEVk0", "readable_id": "symbolic-interactionism"}, "nrOg85VPQgw": {"duration": 473, "path": "khan/test-prep/mcat/physical-processes/spherical-mirrors/virtual-image/", "keywords": "Virtual, Image, optics, mirror", "id": "nrOg85VPQgw", "title": "Virtual image", "description": "Virtual Image", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nrOg85VPQgw.mp4/nrOg85VPQgw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nrOg85VPQgw.mp4/nrOg85VPQgw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nrOg85VPQgw.m3u8/nrOg85VPQgw.m3u8"}, "slug": "virtual-image", "video_id": "nrOg85VPQgw", "youtube_id": "nrOg85VPQgw", "readable_id": "virtual-image"}, "ysVcAYo7UPI": {"duration": 320, "path": "khan/math/precalculus/imaginary_complex_precalc/i_precalc/introduction-to-i-and-imaginary-numbers/", "keywords": "imaginary, unit, complex, numbers, exponents", "id": "ysVcAYo7UPI", "title": "Introduction to i and imaginary numbers", "description": "Introduction to i and imaginary numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ysVcAYo7UPI.mp4/ysVcAYo7UPI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ysVcAYo7UPI.mp4/ysVcAYo7UPI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ysVcAYo7UPI.m3u8/ysVcAYo7UPI.m3u8"}, "slug": "introduction-to-i-and-imaginary-numbers", "video_id": "ysVcAYo7UPI", "youtube_id": "ysVcAYo7UPI", "readable_id": "introduction-to-i-and-imaginary-numbers"}, "TpLlJ8-AnQM": {"duration": 191, "path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/open-market-operations-and-quantitative-easing-overview/", "keywords": "federal, reserve, economics", "id": "TpLlJ8-AnQM", "title": "Open market operations and quantitative easing overview", "description": "Basic difference between traditional open market operations and quantitative easing.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TpLlJ8-AnQM.mp4/TpLlJ8-AnQM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TpLlJ8-AnQM.mp4/TpLlJ8-AnQM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TpLlJ8-AnQM.m3u8/TpLlJ8-AnQM.m3u8"}, "slug": "open-market-operations-and-quantitative-easing-overview", "video_id": "TpLlJ8-AnQM", "youtube_id": "TpLlJ8-AnQM", "readable_id": "open-market-operations-and-quantitative-easing-overview"}, "mmobuVQPAqk": {"duration": 155, "path": "khan/college-admissions/paying-for-college/introduction-pfc/sal-khans-story-paying-for-college/", "keywords": "", "id": "mmobuVQPAqk", "title": "Sal Khan's story: Paying for college", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mmobuVQPAqk.mp4/mmobuVQPAqk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mmobuVQPAqk.mp4/mmobuVQPAqk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mmobuVQPAqk.m3u8/mmobuVQPAqk.m3u8"}, "slug": "sal-khans-story-paying-for-college", "video_id": "mmobuVQPAqk", "youtube_id": "mmobuVQPAqk", "readable_id": "sal-khans-story-paying-for-college"}, "L72h7bk6HZs": {"duration": 292, "path": "khan/test-prep/mcat/society-and-culture/social-structures/institutions-government-economy-and-health-and-medicine/", "keywords": "", "id": "L72h7bk6HZs", "title": "Social institutions - government, economy, health and medicine", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L72h7bk6HZs.mp4/L72h7bk6HZs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L72h7bk6HZs.mp4/L72h7bk6HZs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L72h7bk6HZs.m3u8/L72h7bk6HZs.m3u8"}, "slug": "institutions-government-economy-and-health-and-medicine", "video_id": "L72h7bk6HZs", "youtube_id": "L72h7bk6HZs", "readable_id": "institutions-government-economy-and-health-and-medicine"}, "WdAFrBpP1Bw": {"duration": 203, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/sluter/claus-sluter-with-claus-de-werve-mourners-tomb-of-philip-the-installed-1410/", "keywords": "", "id": "WdAFrBpP1Bw", "title": "Claus Sluter and Claus de Werve, Mourners, from the Tomb of Philip the Bold", "description": "Claus Sluter (with Claus de Werve), Mourners, Tomb of Philip the Bold, Duke of Burgundy, 1410 (Museum of Fine Arts, Dijon) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WdAFrBpP1Bw.mp4/WdAFrBpP1Bw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WdAFrBpP1Bw.mp4/WdAFrBpP1Bw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WdAFrBpP1Bw.m3u8/WdAFrBpP1Bw.m3u8"}, "slug": "claus-sluter-with-claus-de-werve-mourners-tomb-of-philip-the-installed-1410", "video_id": "WdAFrBpP1Bw", "youtube_id": "WdAFrBpP1Bw", "readable_id": "claus-sluter-with-claus-de-werve-mourners-tomb-of-philip-the-installed-1410"}, "kITJ6qH7jS0": {"duration": 583, "path": "khan/math/pre-algebra/exponents-radicals/exponent-properties/exponent-rules-part-1/", "keywords": "Math, exponents, exponent, rules, Khan, Academy, CC_8_EE_1", "id": "kITJ6qH7jS0", "title": "Exponent rules part 1", "description": "Introduction to exponent rules", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kITJ6qH7jS0.mp4/kITJ6qH7jS0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kITJ6qH7jS0.mp4/kITJ6qH7jS0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kITJ6qH7jS0.m3u8/kITJ6qH7jS0.m3u8"}, "slug": "exponent-rules-part-1", "video_id": "kITJ6qH7jS0", "youtube_id": "kITJ6qH7jS0", "readable_id": "exponent-rules-part-1"}, "YUQXdnZPdxE": {"duration": 485, "path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-variable-block/", "keywords": "", "id": "YUQXdnZPdxE", "title": "Variable block (counter)", "description": "Store values using the variable block (build a counter)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YUQXdnZPdxE.mp4/YUQXdnZPdxE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YUQXdnZPdxE.mp4/YUQXdnZPdxE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YUQXdnZPdxE.m3u8/YUQXdnZPdxE.m3u8"}, "slug": "lego-variable-block", "video_id": "YUQXdnZPdxE", "youtube_id": "YUQXdnZPdxE", "readable_id": "lego-variable-block"}, "JEZaUvH2Eq8": {"duration": 170, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s3-easier/", "keywords": "", "id": "JEZaUvH2Eq8", "title": "Complex numbers \u2014 Basic example", "description": "\u200bWatch Sal work through a basic Complex numbers problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JEZaUvH2Eq8.mp4/JEZaUvH2Eq8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JEZaUvH2Eq8.mp4/JEZaUvH2Eq8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JEZaUvH2Eq8.m3u8/JEZaUvH2Eq8.m3u8"}, "slug": "sat-math-s3-easier", "video_id": "JEZaUvH2Eq8", "youtube_id": "JEZaUvH2Eq8", "readable_id": "sat-math-s3-easier"}, "Uq5Wzs96tiw": {"duration": 731, "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/budget-line/", "keywords": "microeconomics, real, income, relative, price", "id": "Uq5Wzs96tiw", "title": "Budget line", "description": "What I can buy with my income", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Uq5Wzs96tiw.mp4/Uq5Wzs96tiw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Uq5Wzs96tiw.mp4/Uq5Wzs96tiw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Uq5Wzs96tiw.m3u8/Uq5Wzs96tiw.m3u8"}, "slug": "budget-line", "video_id": "Uq5Wzs96tiw", "youtube_id": "Uq5Wzs96tiw", "readable_id": "budget-line"}, "GdfP-loRfm0": {"duration": 360, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/post-stroke-inflammation/", "keywords": "", "id": "GdfP-loRfm0", "title": "Post stroke inflammation", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GdfP-loRfm0.mp4/GdfP-loRfm0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GdfP-loRfm0.mp4/GdfP-loRfm0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GdfP-loRfm0.m3u8/GdfP-loRfm0.m3u8"}, "slug": "post-stroke-inflammation", "video_id": "GdfP-loRfm0", "youtube_id": "GdfP-loRfm0", "readable_id": "post-stroke-inflammation"}, "_X_QwpXsdOs": {"duration": 677, "path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/more-laplace-transform-tools/", "keywords": "laplace, transform, differential, equations", "id": "_X_QwpXsdOs", "title": "\"Shifting\" transform by multiplying function by exponential", "description": "A grab bag of things to know about the Laplace Transform.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_X_QwpXsdOs.mp4/_X_QwpXsdOs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_X_QwpXsdOs.mp4/_X_QwpXsdOs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_X_QwpXsdOs.m3u8/_X_QwpXsdOs.m3u8"}, "slug": "more-laplace-transform-tools", "video_id": "_X_QwpXsdOs", "youtube_id": "_X_QwpXsdOs", "readable_id": "more-laplace-transform-tools"}, "zmQrI4786cc": {"duration": 206, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2008-may-8-14/", "keywords": "", "id": "zmQrI4786cc", "title": "14 Equation of diameter of circle", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zmQrI4786cc.mp4/zmQrI4786cc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zmQrI4786cc.mp4/zmQrI4786cc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zmQrI4786cc.m3u8/zmQrI4786cc.m3u8"}, "slug": "sat-2008-may-8-14", "video_id": "zmQrI4786cc", "youtube_id": "zmQrI4786cc", "readable_id": "sat-2008-may-8-14"}, "7d6S8y2kYSg": {"duration": 206, "path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/matisse-luxe-calme-et-volupt-1904/", "keywords": "Matisse, Musee d'Orsay, Paris, Fauvism, Art History", "id": "7d6S8y2kYSg", "title": "Matisse, Luxe, calme et volupt\u00e9", "description": "Henri Matisse, Luxe, calme et volupt\u00e9, 1904, oil on canvas, 37 x 46 inches (Muse\u00e9 d'Orsay, Paris)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nPainted while the artist stayed with the pointillist painter, Signac, at his home in Saint-Tropez on the C\u00f4te d'Azur. Matisse's title comes from Charles Baudelaire's\npoem, L'invitation au voyage (Invitation To A Voyage) from his collection, The Flowers of Evil. Luxe, calme et volupt\u00e9 translates just as it sounds in English, Luxury, calm, and voluptuous(ness)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7d6S8y2kYSg.mp4/7d6S8y2kYSg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7d6S8y2kYSg.mp4/7d6S8y2kYSg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7d6S8y2kYSg.m3u8/7d6S8y2kYSg.m3u8"}, "slug": "matisse-luxe-calme-et-volupt-1904", "video_id": "7d6S8y2kYSg", "youtube_id": "7d6S8y2kYSg", "readable_id": "matisse-luxe-calme-et-volupt-1904"}, "JQ_Wojqtn7c": {"duration": 34, "path": "khan/science/discoveries-projects/discoveries/magnetism/floating-magnet-poles/", "keywords": "magnetic poles", "id": "JQ_Wojqtn7c", "title": "Floating magnet", "description": "Can you use a magnet as a compass? How can you find North vs. South pole?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JQ_Wojqtn7c.mp4/JQ_Wojqtn7c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JQ_Wojqtn7c.mp4/JQ_Wojqtn7c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JQ_Wojqtn7c.m3u8/JQ_Wojqtn7c.m3u8"}, "slug": "floating-magnet-poles", "video_id": "JQ_Wojqtn7c", "youtube_id": "JQ_Wojqtn7c", "readable_id": "floating-magnet-poles"}, "Aa1CMokCch4": {"duration": 564, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties/alcohol-properties/", "keywords": "Alcohol, Properties", "id": "Aa1CMokCch4", "title": "Alcohol properties", "description": "Alcohol Properties", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Aa1CMokCch4.mp4/Aa1CMokCch4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Aa1CMokCch4.mp4/Aa1CMokCch4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Aa1CMokCch4.m3u8/Aa1CMokCch4.m3u8"}, "slug": "alcohol-properties", "video_id": "Aa1CMokCch4", "youtube_id": "Aa1CMokCch4", "readable_id": "alcohol-properties"}, "Ij_ERo1Ashc": {"duration": 611, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/causes-of-pericarditis/", "keywords": "", "id": "Ij_ERo1Ashc", "title": "Causes of pericarditis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ij_ERo1Ashc.mp4/Ij_ERo1Ashc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ij_ERo1Ashc.mp4/Ij_ERo1Ashc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ij_ERo1Ashc.m3u8/Ij_ERo1Ashc.m3u8"}, "slug": "causes-of-pericarditis", "video_id": "Ij_ERo1Ashc", "youtube_id": "Ij_ERo1Ashc", "readable_id": "causes-of-pericarditis"}, "qkVX03qMzb4": {"duration": 337, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis/complications-of-pertussis/", "keywords": "", "id": "qkVX03qMzb4", "title": "Pertussis complications", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qkVX03qMzb4.mp4/qkVX03qMzb4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qkVX03qMzb4.mp4/qkVX03qMzb4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qkVX03qMzb4.m3u8/qkVX03qMzb4.m3u8"}, "slug": "complications-of-pertussis", "video_id": "qkVX03qMzb4", "youtube_id": "qkVX03qMzb4", "readable_id": "complications-of-pertussis"}, "KwNe9x0eChs": {"duration": 607, "path": "khan/science/biology/energy-and-enzymes/energy-in-metabolism/introduction-to-metabolism-anabolism-and-catabolism/", "keywords": "education,online learning,learning,lessons,metabolism,catabolism,anabolism", "id": "KwNe9x0eChs", "title": "Introduction to metabolism: anabolism and catabolism", "description": "Introduction to metabolism: anabolism and catabolism", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KwNe9x0eChs.mp4/KwNe9x0eChs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KwNe9x0eChs.mp4/KwNe9x0eChs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KwNe9x0eChs.m3u8/KwNe9x0eChs.m3u8"}, "slug": "introduction-to-metabolism-anabolism-and-catabolism", "video_id": "KwNe9x0eChs", "youtube_id": "KwNe9x0eChs", "readable_id": "introduction-to-metabolism-anabolism-and-catabolism"}, "WScwPIPqZa0": {"duration": 562, "path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/ideal-gas-equation-pv-nrt/", "keywords": "ideal, gas, law, pressure, volume, temperature", "id": "WScwPIPqZa0", "title": "Ideal gas equation: PV = nRT", "description": "Intuition behind the ideal gas equation: PV=nRT.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WScwPIPqZa0.mp4/WScwPIPqZa0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WScwPIPqZa0.mp4/WScwPIPqZa0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WScwPIPqZa0.m3u8/WScwPIPqZa0.m3u8"}, "slug": "ideal-gas-equation-pv-nrt", "video_id": "WScwPIPqZa0", "youtube_id": "WScwPIPqZa0", "readable_id": "ideal-gas-equation-pv-nrt"}, "iFCIgn3Q9XE": {"duration": 451, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony/ludwig-van-beethoven-symphony-no-5-analysis-by-gerard-schwarz-mov-2/", "keywords": "", "id": "iFCIgn3Q9XE", "title": "Ludwig van Beethoven: Symphony No. 5 Analysis by Gerard Schwarz (part 2)", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iFCIgn3Q9XE.mp4/iFCIgn3Q9XE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iFCIgn3Q9XE.mp4/iFCIgn3Q9XE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iFCIgn3Q9XE.m3u8/iFCIgn3Q9XE.m3u8"}, "slug": "ludwig-van-beethoven-symphony-no-5-analysis-by-gerard-schwarz-mov-2", "video_id": "iFCIgn3Q9XE", "youtube_id": "iFCIgn3Q9XE", "readable_id": "ludwig-van-beethoven-symphony-no-5-analysis-by-gerard-schwarz-mov-2"}, "4CAQN-nc8Ac": {"duration": 541, "path": "khan/test-prep/mcat/society-and-culture/demographics/population-dynamics/", "keywords": "", "id": "4CAQN-nc8Ac", "title": "Population dynamics", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4CAQN-nc8Ac.mp4/4CAQN-nc8Ac.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4CAQN-nc8Ac.mp4/4CAQN-nc8Ac.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4CAQN-nc8Ac.m3u8/4CAQN-nc8Ac.m3u8"}, "slug": "population-dynamics", "video_id": "4CAQN-nc8Ac", "youtube_id": "4CAQN-nc8Ac", "readable_id": "population-dynamics"}, "vhfjEpQWWeE": {"duration": 733, "path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/laplace-transform-of-the-dirac-delta-function/", "keywords": "differential, equations, laplace, transform, dirac", "id": "vhfjEpQWWeE", "title": "Laplace transform of the dirac delta function", "description": "Figuring out the Laplace Transform of the Dirac Delta Function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vhfjEpQWWeE.mp4/vhfjEpQWWeE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vhfjEpQWWeE.mp4/vhfjEpQWWeE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vhfjEpQWWeE.m3u8/vhfjEpQWWeE.m3u8"}, "slug": "laplace-transform-of-the-dirac-delta-function", "video_id": "vhfjEpQWWeE", "youtube_id": "vhfjEpQWWeE", "readable_id": "laplace-transform-of-the-dirac-delta-function"}, "X9rTIwc1wRU": {"duration": 691, "path": "khan/math/algebra/quadratics/quadratic_odds_ends/algebra-ii-shifting-quadratic-graphs/", "keywords": "shifting, quadartic, graph, roots", "id": "X9rTIwc1wRU", "title": "Examples: Graphing and interpreting quadratics", "description": "36-38, shifting quadratic graphs and finding x-intercepts (roots)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X9rTIwc1wRU.mp4/X9rTIwc1wRU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X9rTIwc1wRU.mp4/X9rTIwc1wRU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X9rTIwc1wRU.m3u8/X9rTIwc1wRU.m3u8"}, "slug": "algebra-ii-shifting-quadratic-graphs", "video_id": "X9rTIwc1wRU", "youtube_id": "X9rTIwc1wRU", "readable_id": "algebra-ii-shifting-quadratic-graphs"}, "sYQ5CSyACpc": {"duration": 336, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/claude-monet-gare-st-lazare-1877/", "keywords": "monet, impressionism, art, art history, smarthistory, gare st lazare", "id": "sYQ5CSyACpc", "title": "Monet, Gare St. Lazare", "description": "Claude Monet, Gare St. Lazare, 1877 (Musee d'Orsay)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sYQ5CSyACpc.mp4/sYQ5CSyACpc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sYQ5CSyACpc.mp4/sYQ5CSyACpc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sYQ5CSyACpc.m3u8/sYQ5CSyACpc.m3u8"}, "slug": "claude-monet-gare-st-lazare-1877", "video_id": "sYQ5CSyACpc", "youtube_id": "sYQ5CSyACpc", "readable_id": "claude-monet-gare-st-lazare-1877"}, "711pdW8TbbY": {"duration": 670, "path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/extraneous-solutions-to-radical-equations/", "keywords": "Extraneous, Solutions, to, Radical, Equations, CC_39336_A-REI_2", "id": "711pdW8TbbY", "title": "Extraneous solutions to radical equations", "description": "Extraneous Solutions to Radical Equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/711pdW8TbbY.mp4/711pdW8TbbY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/711pdW8TbbY.mp4/711pdW8TbbY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/711pdW8TbbY.m3u8/711pdW8TbbY.m3u8"}, "slug": "extraneous-solutions-to-radical-equations", "video_id": "711pdW8TbbY", "youtube_id": "711pdW8TbbY", "readable_id": "extraneous-solutions-to-radical-equations"}, "3M8bwwafMxY": {"duration": 746, "path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/crash-course-world-history-13/", "keywords": "crash course", "id": "3M8bwwafMxY", "title": "Islam, the Quran, and the Five Pillars all without a flamewar", "description": "In which John Green teaches you the history of Islam, including the revelation of the Qu'ran to Muhammad, the five pillars of Islam, how the Islamic empire got its start, the Rightly Guided Caliphs, and more. Learn about hadiths, Abu Bakr, and whether the Umma has anything to do with Uma Thurman (spoiler alert: it doesn't). Also, learn a little about the split between Sunni and Shia Muslims, and how to tell if this year's Ramadan is going to be difficult for your Muslim friends. Let's try to keep the flame wars out of this reasoned discussion.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3M8bwwafMxY.mp4/3M8bwwafMxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3M8bwwafMxY.mp4/3M8bwwafMxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3M8bwwafMxY.m3u8/3M8bwwafMxY.m3u8"}, "slug": "crash-course-world-history-13", "video_id": "3M8bwwafMxY", "youtube_id": "3M8bwwafMxY", "readable_id": "crash-course-world-history-13"}, "KjQ1KN5GgoE": {"duration": 154, "path": "khan/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/example-with-tangent-and-radius/", "keywords": "", "id": "KjQ1KN5GgoE", "title": "Example with tangent and radius", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KjQ1KN5GgoE.mp4/KjQ1KN5GgoE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KjQ1KN5GgoE.mp4/KjQ1KN5GgoE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KjQ1KN5GgoE.m3u8/KjQ1KN5GgoE.m3u8"}, "slug": "example-with-tangent-and-radius", "video_id": "KjQ1KN5GgoE", "youtube_id": "KjQ1KN5GgoE", "readable_id": "example-with-tangent-and-radius"}, "OhRr26AfFBU": {"duration": 625, "path": "khan/math/probability/statistics-inferential/normal_distribution/ck12-org-normal-distribution-problems-empirical-rule/", "keywords": "empirical, rule, normal, distribution, CC_6_SP_5_c, CC_6_SP_5_d", "id": "OhRr26AfFBU", "title": "ck12.org normal distribution problems: Empirical rule", "description": "Using the empirical rule (or 68-95-99.7 rule) to estimate probabilities for normal distributions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OhRr26AfFBU.mp4/OhRr26AfFBU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OhRr26AfFBU.mp4/OhRr26AfFBU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OhRr26AfFBU.m3u8/OhRr26AfFBU.m3u8"}, "slug": "ck12-org-normal-distribution-problems-empirical-rule", "video_id": "OhRr26AfFBU", "youtube_id": "OhRr26AfFBU", "readable_id": "ck12-org-normal-distribution-problems-empirical-rule"}, "Um92GZLCQ_Q": {"duration": 901, "path": "khan/humanities/history/euro-hist/cold-war/allende-and-pinochet-in-chile/", "keywords": "cia, nixon, kissinger, allende, pinochet", "id": "Um92GZLCQ_Q", "title": "Allende and Pinochet in Chile", "description": "Outline of the 1973 Allende Coup in Chile and Pinochet's Junta (this video under CC-BY-SA)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Um92GZLCQ_Q.mp4/Um92GZLCQ_Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Um92GZLCQ_Q.mp4/Um92GZLCQ_Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Um92GZLCQ_Q.m3u8/Um92GZLCQ_Q.m3u8"}, "slug": "allende-and-pinochet-in-chile", "video_id": "Um92GZLCQ_Q", "youtube_id": "Um92GZLCQ_Q", "readable_id": "allende-and-pinochet-in-chile"}, "0oGJTQCy4cQ": {"duration": 269, "path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/introduction-to-the-matrix/", "keywords": "", "id": "0oGJTQCy4cQ", "title": "Introduction to the matrix", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0oGJTQCy4cQ.mp4/0oGJTQCy4cQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0oGJTQCy4cQ.mp4/0oGJTQCy4cQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0oGJTQCy4cQ.m3u8/0oGJTQCy4cQ.m3u8"}, "slug": "introduction-to-the-matrix", "video_id": "0oGJTQCy4cQ", "youtube_id": "0oGJTQCy4cQ", "readable_id": "introduction-to-the-matrix"}, "dHXzusNSF60": {"duration": 425, "path": "khan/humanities/history/euro-hist/american-entry-world-war-i/united-states-enters-world-war-i/", "keywords": "", "id": "dHXzusNSF60", "title": "United States enters World War I", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dHXzusNSF60.mp4/dHXzusNSF60.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dHXzusNSF60.mp4/dHXzusNSF60.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dHXzusNSF60.m3u8/dHXzusNSF60.m3u8"}, "slug": "united-states-enters-world-war-i", "video_id": "dHXzusNSF60", "youtube_id": "dHXzusNSF60", "readable_id": "united-states-enters-world-war-i"}, "daCT_24RnIY": {"duration": 442, "path": "khan/math/on-sixth-grade-math/on-measurement/on-volume/measuring-volume-as-area-times-length/", "keywords": "", "id": "daCT_24RnIY", "title": "Volume: measuring as area times length", "description": "Sometimes, we can't just count the number of cubes to find the volume because there are too many. In those situations, you need another way of measuring volume. This video gives you the solution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/daCT_24RnIY.mp4/daCT_24RnIY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/daCT_24RnIY.mp4/daCT_24RnIY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/daCT_24RnIY.m3u8/daCT_24RnIY.m3u8"}, "slug": "measuring-volume-as-area-times-length", "video_id": "daCT_24RnIY", "youtube_id": "daCT_24RnIY", "readable_id": "measuring-volume-as-area-times-length"}, "KSclrkk_Ako": {"duration": 602, "path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/types-of-hormones/", "keywords": "hormones", "id": "KSclrkk_Ako", "title": "Types of hormones", "description": "There are three major types of hormones, based on structure, in our body. Lets find out a little more about them. By Ryan Patton.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KSclrkk_Ako.mp4/KSclrkk_Ako.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KSclrkk_Ako.mp4/KSclrkk_Ako.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KSclrkk_Ako.m3u8/KSclrkk_Ako.m3u8"}, "slug": "types-of-hormones", "video_id": "KSclrkk_Ako", "youtube_id": "KSclrkk_Ako", "readable_id": "types-of-hormones"}, "ad5e-jy-eqs": {"duration": 756, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-alcohols-tutorial/preparation-of-alcohols-using-nabh4/", "keywords": "", "id": "ad5e-jy-eqs", "title": "Preparation of alcohols using NaBH4", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ad5e-jy-eqs.mp4/ad5e-jy-eqs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ad5e-jy-eqs.mp4/ad5e-jy-eqs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ad5e-jy-eqs.m3u8/ad5e-jy-eqs.m3u8"}, "slug": "preparation-of-alcohols-using-nabh4", "video_id": "ad5e-jy-eqs", "youtube_id": "ad5e-jy-eqs", "readable_id": "preparation-of-alcohols-using-nabh4"}, "7Bxp98ChqT0": {"duration": 120, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-4-4/", "keywords": "", "id": "7Bxp98ChqT0", "title": "4 Negative numbers and absolute value", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7Bxp98ChqT0.mp4/7Bxp98ChqT0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7Bxp98ChqT0.mp4/7Bxp98ChqT0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7Bxp98ChqT0.m3u8/7Bxp98ChqT0.m3u8"}, "slug": "sat-2008-may-4-4", "video_id": "7Bxp98ChqT0", "youtube_id": "7Bxp98ChqT0", "readable_id": "sat-2008-may-4-4"}, "6KmeGpjeLZ0": {"duration": 485, "path": "khan/math/algebra2/logarithms-tutorial/logarithmic-scale-patterns/vi-and-sal-talk-about-the-mysteries-of-benford-s-law/", "keywords": "benford, math, numbers", "id": "6KmeGpjeLZ0", "title": "Vi and Sal talk about the mysteries of Benford's law", "description": "Vi Hart visits Khan Academy and talks about Benford's Law with Sal", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6KmeGpjeLZ0.mp4/6KmeGpjeLZ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6KmeGpjeLZ0.mp4/6KmeGpjeLZ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6KmeGpjeLZ0.m3u8/6KmeGpjeLZ0.m3u8"}, "slug": "vi-and-sal-talk-about-the-mysteries-of-benford-s-law", "video_id": "6KmeGpjeLZ0", "youtube_id": "6KmeGpjeLZ0", "readable_id": "vi-and-sal-talk-about-the-mysteries-of-benford-s-law"}, "lj_gLquca7Q": {"duration": 290, "path": "khan/partner-content/wi-phi/value-theory-1/tragedy-of-commons/", "keywords": "Philosophy (Field Of Study),Rational Choice Theory (Field Of Study),Tragedy Of The Commons,WiPhi,Wireless Philosophy,Duke University (College/University),University Of North Carolina At Chapel Hill (College/University),Khan Academy (Nonprofit Organization),Western Philosophy (Field Of Study),Critical Thinking (Literature Subject),Value (Literature Subject),Jonathan Anomaly,Economics (Field Of Study),Explained,Rationality (Literature Subject)", "id": "lj_gLquca7Q", "title": "Political: Tragedy of the Commons", "description": "In this video, Professor Jonathan Anomaly discusses commons tragedies, which are defined as a situation in which the benefits of an action are borne by the individual while the costs are shared by all members of a group.\n\nSpeaker: Dr.\u00a0Jonathan Anomaly, Lecturer/Research Assistant Professor, Duke University and University of North Carolina at Chapel Hill", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lj_gLquca7Q.mp4/lj_gLquca7Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lj_gLquca7Q.mp4/lj_gLquca7Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lj_gLquca7Q.m3u8/lj_gLquca7Q.m3u8"}, "slug": "tragedy-of-commons", "video_id": "lj_gLquca7Q", "youtube_id": "lj_gLquca7Q", "readable_id": "tragedy-of-commons"}, "3oeLGKeNPj0": {"duration": 179, "path": "khan/humanities/becoming-modern/symbolism/arnold-b-cklin-self-portrait-with-death-playing-the-fiddle-1872/", "keywords": "Arnold B\u00f6cklin, B\u00f6cklin, Bocklin Self-Portrait, Death Playing the Fiddle, 1872, Alte Nationalgalerie, painting, German, art, Google Art Project, Smarthistory, Khan Academy, OER, art history, violin", "id": "3oeLGKeNPj0", "title": "B\u00f6cklin, Self-Portrait with Death Playing the Fiddle", "description": "Arnold B\u00f6cklin, Self-Portrait with Death Playing the Fiddle, 1872, oil on canvas, 75 x 61 cm (Alte Nationalgalerie, Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3oeLGKeNPj0.mp4/3oeLGKeNPj0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3oeLGKeNPj0.mp4/3oeLGKeNPj0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3oeLGKeNPj0.m3u8/3oeLGKeNPj0.m3u8"}, "slug": "arnold-b-cklin-self-portrait-with-death-playing-the-fiddle-1872", "video_id": "3oeLGKeNPj0", "youtube_id": "3oeLGKeNPj0", "readable_id": "arnold-b-cklin-self-portrait-with-death-playing-the-fiddle-1872"}, "tx2Niw7aJJ8": {"duration": 111, "path": "khan/math/arithmetic/multiplication-division/multi_digit_multiplication/multiplying-whole-numbers-and-applications-4/", "keywords": "U01_L3_T1_we4, Multiplying, Whole, Numbers, and, Applications, CC_3_NBT_1, CC_3_OA_8, CC_4_NBT_3, CC_4_NBT_5, CC_4_OA_3, CC_5_NBT_5", "id": "tx2Niw7aJJ8", "title": "Multiplication estimation example", "description": "Estimating the product of two, 2-digit numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tx2Niw7aJJ8.mp4/tx2Niw7aJJ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tx2Niw7aJJ8.mp4/tx2Niw7aJJ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tx2Niw7aJJ8.m3u8/tx2Niw7aJJ8.m3u8"}, "slug": "multiplying-whole-numbers-and-applications-4", "video_id": "tx2Niw7aJJ8", "youtube_id": "tx2Niw7aJJ8", "readable_id": "multiplying-whole-numbers-and-applications-4"}, "Mu2pqXgArxY": {"duration": 211, "path": "khan/college-admissions/making-high-school-count/standardized-tests/overview-of-act/", "keywords": "", "id": "Mu2pqXgArxY", "title": "Overview of the ACT", "description": "Official ACT Website", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mu2pqXgArxY.mp4/Mu2pqXgArxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mu2pqXgArxY.mp4/Mu2pqXgArxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mu2pqXgArxY.m3u8/Mu2pqXgArxY.m3u8"}, "slug": "overview-of-act", "video_id": "Mu2pqXgArxY", "youtube_id": "Mu2pqXgArxY", "readable_id": "overview-of-act"}, "Dru0RHgfp2g": {"duration": 694, "path": "khan/math/algebra2/conics_precalc/conics_precalc_eqs/conic-identification-3/", "keywords": "conic, sections, parabola, circle", "id": "Dru0RHgfp2g", "title": "Identifying circles and parabolas from equations", "description": "Let's identify (and graph) a couple of more conics!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Dru0RHgfp2g.mp4/Dru0RHgfp2g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Dru0RHgfp2g.mp4/Dru0RHgfp2g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Dru0RHgfp2g.m3u8/Dru0RHgfp2g.m3u8"}, "slug": "conic-identification-3", "video_id": "Dru0RHgfp2g", "youtube_id": "Dru0RHgfp2g", "readable_id": "conic-identification-3"}, "ogg_ZxSeNQ0": {"duration": 353, "path": "khan/math/geometry/cc-geometry-circles/equation-of-a-circle/pythagorean-theorem-and-radii-of-circles/", "keywords": "", "id": "ogg_ZxSeNQ0", "title": "Pythagorean theorem and radii of circles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ogg_ZxSeNQ0.mp4/ogg_ZxSeNQ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ogg_ZxSeNQ0.mp4/ogg_ZxSeNQ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ogg_ZxSeNQ0.m3u8/ogg_ZxSeNQ0.m3u8"}, "slug": "pythagorean-theorem-and-radii-of-circles", "video_id": "ogg_ZxSeNQ0", "youtube_id": "ogg_ZxSeNQ0", "readable_id": "pythagorean-theorem-and-radii-of-circles"}, "tDi9BD__gRY": {"duration": 388, "path": "khan/test-prep/mcat/individuals-and-society/social-behavior/proximity-and-the-mere-exposure-effect/", "keywords": "", "id": "tDi9BD__gRY", "title": "Proximity and the mere exposure effect", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tDi9BD__gRY.mp4/tDi9BD__gRY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tDi9BD__gRY.mp4/tDi9BD__gRY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tDi9BD__gRY.m3u8/tDi9BD__gRY.m3u8"}, "slug": "proximity-and-the-mere-exposure-effect", "video_id": "tDi9BD__gRY", "youtube_id": "tDi9BD__gRY", "readable_id": "proximity-and-the-mere-exposure-effect"}, "tzR9jUCSniQ": {"duration": 594, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-trigonometric-maximum/", "keywords": "2010, IIT, JEE, Paper, Problem, 48, Trigonometric, Maximum", "id": "tzR9jUCSniQ", "title": "IIT JEE trigonometric maximum", "description": "2010 IIT JEE Paper 1 Problem 48 Trigonometric Maximum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tzR9jUCSniQ.mp4/tzR9jUCSniQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tzR9jUCSniQ.mp4/tzR9jUCSniQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tzR9jUCSniQ.m3u8/tzR9jUCSniQ.m3u8"}, "slug": "iit-jee-trigonometric-maximum", "video_id": "tzR9jUCSniQ", "youtube_id": "tzR9jUCSniQ", "readable_id": "iit-jee-trigonometric-maximum"}, "KxOp3s9ottg": {"duration": 356, "path": "khan/math/algebra/algebra-functions/positive-negative-increasing-decreasing-intervals/increasing-decreasing-positive-and-negative-intervals/", "keywords": "", "id": "KxOp3s9ottg", "title": "Introduction to increasing, decreasing, positive or negative intervals", "description": "Sal discusses there Intervals where function is increasing, decreasing, postive or negative and their graphical representation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KxOp3s9ottg.mp4/KxOp3s9ottg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KxOp3s9ottg.mp4/KxOp3s9ottg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KxOp3s9ottg.m3u8/KxOp3s9ottg.m3u8"}, "slug": "increasing-decreasing-positive-and-negative-intervals", "video_id": "KxOp3s9ottg", "youtube_id": "KxOp3s9ottg", "readable_id": "increasing-decreasing-positive-and-negative-intervals"}, "4qdD4Ny34cc": {"duration": 626, "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/movement-signs-and-symptoms-of-parkinsons-disease/", "keywords": "", "id": "4qdD4Ny34cc", "title": "Movement signs and symptoms of Parkinson's disease", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4qdD4Ny34cc.mp4/4qdD4Ny34cc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4qdD4Ny34cc.mp4/4qdD4Ny34cc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4qdD4Ny34cc.m3u8/4qdD4Ny34cc.m3u8"}, "slug": "movement-signs-and-symptoms-of-parkinsons-disease", "video_id": "4qdD4Ny34cc", "youtube_id": "4qdD4Ny34cc", "readable_id": "movement-signs-and-symptoms-of-parkinsons-disease"}, "TZrKrNVhbjI": {"duration": 222, "path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/transpose-of-a-matrix/", "keywords": "", "id": "TZrKrNVhbjI", "title": "Transpose of a matrix", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TZrKrNVhbjI.mp4/TZrKrNVhbjI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TZrKrNVhbjI.mp4/TZrKrNVhbjI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TZrKrNVhbjI.m3u8/TZrKrNVhbjI.m3u8"}, "slug": "transpose-of-a-matrix", "video_id": "TZrKrNVhbjI", "youtube_id": "TZrKrNVhbjI", "readable_id": "transpose-of-a-matrix"}, "OLO64d4Y1qI": {"duration": 219, "path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-with-ln-x/", "keywords": "", "id": "OLO64d4Y1qI", "title": "u-substitution with ln(x)", "description": "Doing u-substitution with ln(x)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OLO64d4Y1qI.mp4/OLO64d4Y1qI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OLO64d4Y1qI.mp4/OLO64d4Y1qI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OLO64d4Y1qI.m3u8/OLO64d4Y1qI.m3u8"}, "slug": "u-substitution-with-ln-x", "video_id": "OLO64d4Y1qI", "youtube_id": "OLO64d4Y1qI", "readable_id": "u-substitution-with-ln-x"}, "HDntI7zfBNs": {"duration": 609, "path": "khan/math/differential-calculus/derivative_applications/motion-along-line-derivatives/total-distance-traveled-by-a-particle/", "keywords": "", "id": "HDntI7zfBNs", "title": "Total distance traveled by a particle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HDntI7zfBNs.mp4/HDntI7zfBNs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HDntI7zfBNs.mp4/HDntI7zfBNs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HDntI7zfBNs.m3u8/HDntI7zfBNs.m3u8"}, "slug": "total-distance-traveled-by-a-particle", "video_id": "HDntI7zfBNs", "youtube_id": "HDntI7zfBNs", "readable_id": "total-distance-traveled-by-a-particle"}, "Xu1lBwJw1OU": {"duration": 196, "path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/angle-sun-with-ground/", "keywords": "", "id": "Xu1lBwJw1OU", "title": "Angle of sun with the ground based on shadow", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Xu1lBwJw1OU.mp4/Xu1lBwJw1OU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Xu1lBwJw1OU.mp4/Xu1lBwJw1OU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Xu1lBwJw1OU.m3u8/Xu1lBwJw1OU.m3u8"}, "slug": "angle-sun-with-ground", "video_id": "Xu1lBwJw1OU", "youtube_id": "Xu1lBwJw1OU", "readable_id": "angle-sun-with-ground"}, "rD25slnTqAE": {"duration": 296, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/corporate-debt-versus-traditional-mortgages/", "keywords": "education, finance, capital, markets", "id": "rD25slnTqAE", "title": "Corporate debt versus traditional mortgages", "description": "Understanding how most corporate debt is different than most personal mortgages", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rD25slnTqAE.mp4/rD25slnTqAE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rD25slnTqAE.mp4/rD25slnTqAE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rD25slnTqAE.m3u8/rD25slnTqAE.m3u8"}, "slug": "corporate-debt-versus-traditional-mortgages", "video_id": "rD25slnTqAE", "youtube_id": "rD25slnTqAE", "readable_id": "corporate-debt-versus-traditional-mortgages"}, "XGZvvQ8BmjY": {"duration": 235, "path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/mantegna-dead-christ-c-1490/", "keywords": "Art History", "id": "XGZvvQ8BmjY", "title": "Mantegna, Dead Christ", "description": "Andrea Mantegna, Dead Christ, tempera on canvas, c. 1480 - 1500 (Pinacoteca di Brera, Milan) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XGZvvQ8BmjY.mp4/XGZvvQ8BmjY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XGZvvQ8BmjY.mp4/XGZvvQ8BmjY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XGZvvQ8BmjY.m3u8/XGZvvQ8BmjY.m3u8"}, "slug": "mantegna-dead-christ-c-1490", "video_id": "XGZvvQ8BmjY", "youtube_id": "XGZvvQ8BmjY", "readable_id": "mantegna-dead-christ-c-1490"}, "-p_-0n2f35o": {"duration": 596, "path": "khan/test-prep/mcat/individuals-and-society/self-identity/vygotsky-sociocultural-development/", "keywords": "", "id": "-p_-0n2f35o", "title": "Vygotsky sociocultural development", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-p_-0n2f35o.mp4/-p_-0n2f35o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-p_-0n2f35o.mp4/-p_-0n2f35o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-p_-0n2f35o.m3u8/-p_-0n2f35o.m3u8"}, "slug": "vygotsky-sociocultural-development", "video_id": "-p_-0n2f35o", "youtube_id": "-p_-0n2f35o", "readable_id": "vygotsky-sociocultural-development"}, "L-0FkEPPdXE": {"duration": 356, "path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/electron-configuration-f-block/", "keywords": "", "id": "L-0FkEPPdXE", "title": "Electron configuration for f block element Nd", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L-0FkEPPdXE.mp4/L-0FkEPPdXE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L-0FkEPPdXE.mp4/L-0FkEPPdXE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L-0FkEPPdXE.m3u8/L-0FkEPPdXE.m3u8"}, "slug": "electron-configuration-f-block", "video_id": "L-0FkEPPdXE", "youtube_id": "L-0FkEPPdXE", "readable_id": "electron-configuration-f-block"}, "oG7C7U3FhhQ": {"duration": 544, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/bass-clarinet-interview-and-demonstration-with-james-ognibene/", "keywords": "", "id": "oG7C7U3FhhQ", "title": "Bass Clarinet: Interview and demonstration with James Ognibene", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oG7C7U3FhhQ.mp4/oG7C7U3FhhQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oG7C7U3FhhQ.mp4/oG7C7U3FhhQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oG7C7U3FhhQ.m3u8/oG7C7U3FhhQ.m3u8"}, "slug": "bass-clarinet-interview-and-demonstration-with-james-ognibene", "video_id": "oG7C7U3FhhQ", "youtube_id": "oG7C7U3FhhQ", "readable_id": "bass-clarinet-interview-and-demonstration-with-james-ognibene"}, "HLGCq2h4ihY": {"duration": 111, "path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/dividing-decimals-2-1/", "keywords": "U03_L2_T2_we4.1, Dividing, Decimals, 2.1, CC_5_NBT_7, CC_6_NS_3", "id": "HLGCq2h4ihY", "title": "Dividing a decimal by a power of 10: shortcut", "description": "Holy cow! A shortcut? Yep. For each ten you multiply or divide by, just shift that decimal to the right or left. Watch this and be amazed.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HLGCq2h4ihY.mp4/HLGCq2h4ihY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HLGCq2h4ihY.mp4/HLGCq2h4ihY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HLGCq2h4ihY.m3u8/HLGCq2h4ihY.m3u8"}, "slug": "dividing-decimals-2-1", "video_id": "HLGCq2h4ihY", "youtube_id": "HLGCq2h4ihY", "readable_id": "dividing-decimals-2-1"}, "0zExhHh7_Ic": {"duration": 259, "path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/slope-of-a-secant-line/", "keywords": "", "id": "0zExhHh7_Ic", "title": "Slope of a secant line example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0zExhHh7_Ic.mp4/0zExhHh7_Ic.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0zExhHh7_Ic.mp4/0zExhHh7_Ic.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0zExhHh7_Ic.m3u8/0zExhHh7_Ic.m3u8"}, "slug": "slope-of-a-secant-line", "video_id": "0zExhHh7_Ic", "youtube_id": "0zExhHh7_Ic", "readable_id": "slope-of-a-secant-line"}, "qBkj-AYYg7w": {"duration": 492, "path": "khan/partner-content/wi-phi/critical-thinking/ad-hominem/", "keywords": "", "id": "qBkj-AYYg7w", "title": "Fallacies: Ad Hominem", "description": "In this video, Paul Henne describes the ad hominem fallacy, which is an informal fallacy that arises when someone attacks the person making the argument rather than their argument. He also describes the four subtypes of this fallacy.\n\nSpeaker: Paul Henne", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qBkj-AYYg7w.mp4/qBkj-AYYg7w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qBkj-AYYg7w.mp4/qBkj-AYYg7w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qBkj-AYYg7w.m3u8/qBkj-AYYg7w.m3u8"}, "slug": "ad-hominem", "video_id": "qBkj-AYYg7w", "youtube_id": "qBkj-AYYg7w", "readable_id": "ad-hominem"}, "WqsJNtBEKtg": {"duration": 690, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/using-the-nernst-equation/", "keywords": "", "id": "WqsJNtBEKtg", "title": "Using the Nernst equation", "description": "Using the Nernst equation to calculate the cell potential when concentrations are not standard conditions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WqsJNtBEKtg.mp4/WqsJNtBEKtg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WqsJNtBEKtg.mp4/WqsJNtBEKtg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WqsJNtBEKtg.m3u8/WqsJNtBEKtg.m3u8"}, "slug": "using-the-nernst-equation", "video_id": "WqsJNtBEKtg", "youtube_id": "WqsJNtBEKtg", "readable_id": "using-the-nernst-equation"}, "LLKX_4DHE3I": {"duration": 1242, "path": "khan/test-prep/mcat/cells/cellular-division/phases-of-mitosis/", "keywords": "mitosis", "id": "LLKX_4DHE3I", "title": "Phases of mitosis", "description": "Explanation of the phases of mitosis.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LLKX_4DHE3I.mp4/LLKX_4DHE3I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LLKX_4DHE3I.mp4/LLKX_4DHE3I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LLKX_4DHE3I.m3u8/LLKX_4DHE3I.m3u8"}, "slug": "phases-of-mitosis", "video_id": "LLKX_4DHE3I", "youtube_id": "LLKX_4DHE3I", "readable_id": "phases-of-mitosis"}, "roap32sTgPk": {"duration": 727, "path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-10-moral-hazard/", "keywords": "fed, bailout, paulsen, bernanke, credit, crunch, lehman, aig", "id": "roap32sTgPk", "title": "Bailout 10: Moral hazard", "description": "Alternate plans and moral hazard.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/roap32sTgPk.mp4/roap32sTgPk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/roap32sTgPk.mp4/roap32sTgPk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/roap32sTgPk.m3u8/roap32sTgPk.m3u8"}, "slug": "bailout-10-moral-hazard", "video_id": "roap32sTgPk", "youtube_id": "roap32sTgPk", "readable_id": "bailout-10-moral-hazard"}, "gfVY7cW7VLQ": {"duration": 1624, "path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/lin-alg-example-using-orthogonal-change-of-basis-matrix-to-find-transformation-matrix/", "keywords": "orthogonal, matrix", "id": "gfVY7cW7VLQ", "title": "Example using orthogonal change-of-basis matrix to find transformation matrix", "description": "Example using orthogonal change-of-basis matrix to find transformation matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gfVY7cW7VLQ.mp4/gfVY7cW7VLQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gfVY7cW7VLQ.mp4/gfVY7cW7VLQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gfVY7cW7VLQ.m3u8/gfVY7cW7VLQ.m3u8"}, "slug": "lin-alg-example-using-orthogonal-change-of-basis-matrix-to-find-transformation-matrix", "video_id": "gfVY7cW7VLQ", "youtube_id": "gfVY7cW7VLQ", "readable_id": "lin-alg-example-using-orthogonal-change-of-basis-matrix-to-find-transformation-matrix"}, "O4Qnsubo2tg": {"duration": 315, "path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/events-and-outcomes-2/", "keywords": "U12_L2_T1_we2, Events, and, Outcomes, CC_7_SP_5, CC_7_SP_6, CC_7_SP_7, CC_7_SP_7_a, CC_7_SP_7_b, CC_7_SP_8, CC_7_SP_8_a, CC_7_SP_8_b", "id": "O4Qnsubo2tg", "title": "Die rolling probability", "description": "We're thinking about the probability of rolling doubles on a pair of dice. Let's create a grid of all possible outcomes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O4Qnsubo2tg.mp4/O4Qnsubo2tg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O4Qnsubo2tg.mp4/O4Qnsubo2tg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O4Qnsubo2tg.m3u8/O4Qnsubo2tg.m3u8"}, "slug": "events-and-outcomes-2", "video_id": "O4Qnsubo2tg", "youtube_id": "O4Qnsubo2tg", "readable_id": "events-and-outcomes-2"}, "ntUjJENYiLw": {"duration": 675, "path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-36/", "keywords": "crash course", "id": "ntUjJENYiLw", "title": "Archdukes, Cynicism, and World War I", "description": "In which John Green teaches you about the war that was supposed to end all wars. Instead, it solved nothing and set the stage for the world to be back at war just a couple of decades later. As an added bonus, World War I changed the way people look at the world, and normalized cynicism and irony. John will teach you how the assassination of an Austrian Archduke kicked off a new kind of war that involved more nations and more people than any war that came before. New technology like machine guns, airplanes, tanks, and poison gas made the killing more efficient than ever. Trench warfare and modern weapons led to battles in which tens of thousands of soldiers were killed in a day, with no ground gained for either side. World War I washed away the last vestiges of 19th century Romanticism and paved the way for the 20th century modernism that we all know and find to be cold and off-putting. While there may not be much upside to WWI, at least it inspired George M. Cohan to write the awesome song, \"Over There.\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ntUjJENYiLw.mp4/ntUjJENYiLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ntUjJENYiLw.mp4/ntUjJENYiLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ntUjJENYiLw.m3u8/ntUjJENYiLw.m3u8"}, "slug": "crash-course-world-history-36", "video_id": "ntUjJENYiLw", "youtube_id": "ntUjJENYiLw", "readable_id": "crash-course-world-history-36"}, "cbz01PPQ5ow": {"duration": 58, "path": "khan/college-admissions/get-started/access-to-college/ss-immigration-obstacles/", "keywords": "", "id": "cbz01PPQ5ow", "title": "Student story: Overcoming immigration obstacles to college", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cbz01PPQ5ow.mp4/cbz01PPQ5ow.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cbz01PPQ5ow.mp4/cbz01PPQ5ow.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cbz01PPQ5ow.m3u8/cbz01PPQ5ow.m3u8"}, "slug": "ss-immigration-obstacles", "video_id": "cbz01PPQ5ow", "youtube_id": "cbz01PPQ5ow", "readable_id": "ss-immigration-obstacles"}, "xMj3jzFDZ38": {"duration": 429, "path": "khan/computing/computer-science/cryptography/random-algorithms-probability/fermat-primality-test-prime-adventure-part-10/", "keywords": "primes", "id": "xMj3jzFDZ38", "title": "Fermat primality test", "description": "A quick outline of how & why it works.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xMj3jzFDZ38.mp4/xMj3jzFDZ38.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xMj3jzFDZ38.mp4/xMj3jzFDZ38.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xMj3jzFDZ38.m3u8/xMj3jzFDZ38.m3u8"}, "slug": "fermat-primality-test-prime-adventure-part-10", "video_id": "xMj3jzFDZ38", "youtube_id": "xMj3jzFDZ38", "readable_id": "fermat-primality-test-prime-adventure-part-10"}, "lc5XDJIgz1s": {"duration": 649, "path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/neurodevelopmental-disorders-sufficient-and-necessary-causes/", "keywords": "Neurodevelopmental Disorder (Disease Or Medical Condition),Health (Industry)", "id": "lc5XDJIgz1s", "title": "Neurodevelopmental disorders: Sufficient and necessary causes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lc5XDJIgz1s.mp4/lc5XDJIgz1s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lc5XDJIgz1s.mp4/lc5XDJIgz1s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lc5XDJIgz1s.m3u8/lc5XDJIgz1s.m3u8"}, "slug": "neurodevelopmental-disorders-sufficient-and-necessary-causes", "video_id": "lc5XDJIgz1s", "youtube_id": "lc5XDJIgz1s", "readable_id": "neurodevelopmental-disorders-sufficient-and-necessary-causes"}, "coDfeoi2zcQ": {"duration": 104, "path": "khan/math/precalculus/vectors-precalc/vector-basic/subtracting-vectors-exercise-example/", "keywords": "", "id": "coDfeoi2zcQ", "title": "Subtracting vectors exercise example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/coDfeoi2zcQ.mp4/coDfeoi2zcQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/coDfeoi2zcQ.mp4/coDfeoi2zcQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/coDfeoi2zcQ.m3u8/coDfeoi2zcQ.m3u8"}, "slug": "subtracting-vectors-exercise-example", "video_id": "coDfeoi2zcQ", "youtube_id": "coDfeoi2zcQ", "readable_id": "subtracting-vectors-exercise-example"}, "gZeliSjhkpg": {"duration": 399, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/celiac-disease-rn/what-is-celiac-disease/", "keywords": "Celiac Disease (Disease Or Medical Condition),Health (Industry)", "id": "gZeliSjhkpg", "title": "What is celiac disease", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gZeliSjhkpg.mp4/gZeliSjhkpg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gZeliSjhkpg.mp4/gZeliSjhkpg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gZeliSjhkpg.m3u8/gZeliSjhkpg.m3u8"}, "slug": "what-is-celiac-disease", "video_id": "gZeliSjhkpg", "youtube_id": "gZeliSjhkpg", "readable_id": "what-is-celiac-disease"}, "a_0Sav-Ue90": {"duration": 76, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p5-easier/", "keywords": "", "id": "a_0Sav-Ue90", "title": "Solving quadratic equations \u2014 Basic example", "description": "Watch Sal work through a basic Solving quadratic equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a_0Sav-Ue90.mp4/a_0Sav-Ue90.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a_0Sav-Ue90.mp4/a_0Sav-Ue90.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a_0Sav-Ue90.m3u8/a_0Sav-Ue90.m3u8"}, "slug": "sat-math-p5-easier", "video_id": "a_0Sav-Ue90", "youtube_id": "a_0Sav-Ue90", "readable_id": "sat-math-p5-easier"}, "CuGg-Tf8lPI": {"duration": 346, "path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/comparing-formal-charges-to-oxidation-states/", "keywords": "", "id": "CuGg-Tf8lPI", "title": "Comparing formal charges to oxidation states", "description": "How formal charges and oxidation states are both ways of counting electrons", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CuGg-Tf8lPI.mp4/CuGg-Tf8lPI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CuGg-Tf8lPI.mp4/CuGg-Tf8lPI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CuGg-Tf8lPI.m3u8/CuGg-Tf8lPI.m3u8"}, "slug": "comparing-formal-charges-to-oxidation-states", "video_id": "CuGg-Tf8lPI", "youtube_id": "CuGg-Tf8lPI", "readable_id": "comparing-formal-charges-to-oxidation-states"}, "N9VIsauE0RA": {"duration": 452, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/gdp-components-tutorial/investment-and-consumption/", "keywords": "macroeconomics", "id": "N9VIsauE0RA", "title": "Investment and consumption", "description": "Difference between every day and economic notions of investment and consumption", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N9VIsauE0RA.mp4/N9VIsauE0RA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N9VIsauE0RA.mp4/N9VIsauE0RA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N9VIsauE0RA.m3u8/N9VIsauE0RA.m3u8"}, "slug": "investment-and-consumption", "video_id": "N9VIsauE0RA", "youtube_id": "N9VIsauE0RA", "readable_id": "investment-and-consumption"}, "w9TmwjUZA6Q": {"duration": 339, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p5-harder/", "keywords": "", "id": "w9TmwjUZA6Q", "title": "Solving quadratic equations \u2014 Harder example", "description": "Watch Sal work through a harder Solving quadratic equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w9TmwjUZA6Q.mp4/w9TmwjUZA6Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w9TmwjUZA6Q.mp4/w9TmwjUZA6Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w9TmwjUZA6Q.m3u8/w9TmwjUZA6Q.m3u8"}, "slug": "sat-math-p5-harder", "video_id": "w9TmwjUZA6Q", "youtube_id": "w9TmwjUZA6Q", "readable_id": "sat-math-p5-harder"}, "CHfU9EDwOwU": {"duration": 337, "path": "khan/humanities/art-asia/imperial-china/yuan-dynasty/buddha-of-medicine-bhaishajyaguru-yaoshi-fo-c-1319/", "keywords": "Buddha, Medicine, Bhaishajyaguru, Yaoshi fo, 1319, Yuan dynasty, Metropolitan Museum of Art, New York, Buddhism, China, Chinese, art, sculpture, Bodhisattva, Wall painting, art history, painting, Khan Academy, Google Art Project, Smarthistory, OER", "id": "CHfU9EDwOwU", "title": "Buddha of Medicine Bhaishajyaguru (Yaoshi fo)", "description": "Buddha of Medicine Bhaishajyaguru (Yaoshi fo), c. 1319, Yuan dynasty, water-based pigments on clay mixed with straw, 24 feet, 8 inches x 49 feet 7 inches / 751.8 cm x 1511.3 cm (Metropolitan Museum of Art, New York)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CHfU9EDwOwU.mp4/CHfU9EDwOwU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CHfU9EDwOwU.mp4/CHfU9EDwOwU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CHfU9EDwOwU.m3u8/CHfU9EDwOwU.m3u8"}, "slug": "buddha-of-medicine-bhaishajyaguru-yaoshi-fo-c-1319", "video_id": "CHfU9EDwOwU", "youtube_id": "CHfU9EDwOwU", "readable_id": "buddha-of-medicine-bhaishajyaguru-yaoshi-fo-c-1319"}, "oOkNS-vvnhQ": {"duration": 603, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/dlco/", "keywords": "", "id": "oOkNS-vvnhQ", "title": "Diffusing capacity of the lung for carbon monoxide (DLCO)", "description": "Diffusing capacity of the lungs for carbon monoxide (DLCO) is a medical test that determines how much oxygen travels from the alveoli of the lungs to the blood stream. Learn what DLCO is, how DLCO a good measure of lung disease severity, and why we use carbon monoxide instead of oxygen or carbon dioxide.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oOkNS-vvnhQ.mp4/oOkNS-vvnhQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oOkNS-vvnhQ.mp4/oOkNS-vvnhQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oOkNS-vvnhQ.m3u8/oOkNS-vvnhQ.m3u8"}, "slug": "dlco", "video_id": "oOkNS-vvnhQ", "youtube_id": "oOkNS-vvnhQ", "readable_id": "dlco"}, "sz_HYdpOuhY": {"duration": 143, "path": "khan/humanities/art-oceania/melanesia/playing-from-memory/", "keywords": "community, memory, music, musical instrument, wood, Australia & Oceania", "id": "sz_HYdpOuhY", "title": "Slit Gong (Atingting kon)", "description": "Met curator Eric Kjellgren on communication in Slit Gong (Atingting kon) by the Tin Mweleun peoples of Ambrym Island in Vanuatu,\u00a0mid to late 1960s.\n\nThe towering slit gongs of northern Vanuatu are among the largest musical instruments in the world. Found primarily on Ambrym, Malekula, and neighboring islands, they are carved from the trunks of breadfruit trees, which are also an important food source. In each village, a number of gongs, comprising a sort of informal orchestra, stand on the village dancing ground. Gong orchestras are played at major social and religious events such as initiations, funerals, and dances. When playing, the musician stands in front of the gong and strikes the lip of the slit with a clublike wooden beater. As the gong ensemble is played, rhythms of immense variety and complexity can be produced by the carefully coordinated actions of multiple drummers.\n\nView this work on metmuseum.org.\u00a0\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sz_HYdpOuhY.mp4/sz_HYdpOuhY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sz_HYdpOuhY.mp4/sz_HYdpOuhY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sz_HYdpOuhY.m3u8/sz_HYdpOuhY.m3u8"}, "slug": "playing-from-memory", "video_id": "sz_HYdpOuhY", "youtube_id": "sz_HYdpOuhY", "readable_id": "playing-from-memory"}, "jG7vhMMXagQ": {"duration": 317, "path": "khan/math/recreational-math/vi-hart/pi-tau/pi-is-still-wrong/", "keywords": "pi, tau, pie, pi day, trigonometry, trig, math, mathematics, Magritte, charlie sheen", "id": "jG7vhMMXagQ", "title": "Pi is (still) wrong.", "description": "Please excuse the simple math and spelling errors. You shouldn't believe anything I say without double-checking even at the best of times.\n\nGo here: http://tauday.com/\nand here: http://www.math.utah.edu/~palais/pi.html\n\nMe: http://vihart.com", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jG7vhMMXagQ.mp4/jG7vhMMXagQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jG7vhMMXagQ.mp4/jG7vhMMXagQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jG7vhMMXagQ.m3u8/jG7vhMMXagQ.m3u8"}, "slug": "pi-is-still-wrong", "video_id": "jG7vhMMXagQ", "youtube_id": "jG7vhMMXagQ", "readable_id": "pi-is-still-wrong"}, "ZFt_v7Asy1s": {"duration": 133, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-7/", "keywords": "", "id": "ZFt_v7Asy1s", "title": "7 Exponential equation with different bases", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZFt_v7Asy1s.mp4/ZFt_v7Asy1s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZFt_v7Asy1s.mp4/ZFt_v7Asy1s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZFt_v7Asy1s.m3u8/ZFt_v7Asy1s.m3u8"}, "slug": "sat-getting-ready-2-7", "video_id": "ZFt_v7Asy1s", "youtube_id": "ZFt_v7Asy1s", "readable_id": "sat-getting-ready-2-7"}, "wfY2vx3P0cE": {"duration": 177, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/warby-parker/warby-parker-3/", "keywords": "", "id": "wfY2vx3P0cE", "title": "Starting and staying in business with friends", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wfY2vx3P0cE.mp4/wfY2vx3P0cE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wfY2vx3P0cE.mp4/wfY2vx3P0cE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wfY2vx3P0cE.m3u8/wfY2vx3P0cE.m3u8"}, "slug": "warby-parker-3", "video_id": "wfY2vx3P0cE", "youtube_id": "wfY2vx3P0cE", "readable_id": "warby-parker-3"}, "vFctYRhK2M0": {"duration": 695, "path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/null-space-3-relation-to-linear-independence/", "keywords": "nullspace, null, space, subspace, matrix, vector", "id": "vFctYRhK2M0", "title": "Null space 3: Relation to linear independence", "description": "Understanding how the null space of a matrix relates to the linear independence of its column vectors", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vFctYRhK2M0.mp4/vFctYRhK2M0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vFctYRhK2M0.mp4/vFctYRhK2M0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vFctYRhK2M0.m3u8/vFctYRhK2M0.m3u8"}, "slug": "null-space-3-relation-to-linear-independence", "video_id": "vFctYRhK2M0", "youtube_id": "vFctYRhK2M0", "readable_id": "null-space-3-relation-to-linear-independence"}, "gR8-vRg6Yp0": {"duration": 439, "path": "khan/math/algebra2/polynomial-and-rational/advanced-structure-in-expression/structure-in-exponential-expression/", "keywords": "", "id": "gR8-vRg6Yp0", "title": "Structure in exponential expression", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gR8-vRg6Yp0.mp4/gR8-vRg6Yp0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gR8-vRg6Yp0.mp4/gR8-vRg6Yp0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gR8-vRg6Yp0.m3u8/gR8-vRg6Yp0.m3u8"}, "slug": "structure-in-exponential-expression", "video_id": "gR8-vRg6Yp0", "youtube_id": "gR8-vRg6Yp0", "readable_id": "structure-in-exponential-expression"}, "SPGRkexI_cs": {"duration": 1233, "path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/the-lungs-and-pulmonary-system/", "keywords": "pulmonary, lungs, larynx, trachea, bronchi, bronchioles, alveoli, diaphragm", "id": "SPGRkexI_cs", "title": "The lungs and pulmonary system", "description": "The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles, alveoli and thoracic diaphragm", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SPGRkexI_cs.mp4/SPGRkexI_cs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SPGRkexI_cs.mp4/SPGRkexI_cs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SPGRkexI_cs.m3u8/SPGRkexI_cs.m3u8"}, "slug": "the-lungs-and-pulmonary-system", "video_id": "SPGRkexI_cs", "youtube_id": "SPGRkexI_cs", "readable_id": "the-lungs-and-pulmonary-system"}, "nuUkcbAId6o": {"duration": 285, "path": "khan/computing/computer-science/informationtheory/moderninfotheory/symbol-rate-information-theory/", "keywords": "symbol rate", "id": "nuUkcbAId6o", "title": "Symbol rate", "description": "Introduction to Symbol Rate (Baud)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nuUkcbAId6o.mp4/nuUkcbAId6o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nuUkcbAId6o.mp4/nuUkcbAId6o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nuUkcbAId6o.m3u8/nuUkcbAId6o.m3u8"}, "slug": "symbol-rate-information-theory", "video_id": "nuUkcbAId6o", "youtube_id": "nuUkcbAId6o", "readable_id": "symbol-rate-information-theory"}, "CAjiDkoZntI": {"duration": 348, "path": "khan/partner-content/big-history-project/life/what-is-life/bhp-minithresholds-of-life/", "keywords": "", "id": "CAjiDkoZntI", "title": "Mini Thresholds Of Life", "description": "Travel through time in a rowboat to consider some of the \"mini-thresholds\" in the development of life on Earth.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CAjiDkoZntI.mp4/CAjiDkoZntI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CAjiDkoZntI.mp4/CAjiDkoZntI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CAjiDkoZntI.m3u8/CAjiDkoZntI.m3u8"}, "slug": "bhp-minithresholds-of-life", "video_id": "CAjiDkoZntI", "youtube_id": "CAjiDkoZntI", "readable_id": "bhp-minithresholds-of-life"}, "wgkRH5Uoavk": {"duration": 687, "path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/error-or-remainder-of-a-taylor-polynomial-approximation/", "keywords": "taylor, BC, calculus, AP, advanced, placement", "id": "wgkRH5Uoavk", "title": "Error or remainder of a Taylor polynomial approximation", "description": "Understanding the properties of the remainder or error function for an Nth degree Taylor approximation of a function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wgkRH5Uoavk.mp4/wgkRH5Uoavk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wgkRH5Uoavk.mp4/wgkRH5Uoavk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wgkRH5Uoavk.m3u8/wgkRH5Uoavk.m3u8"}, "slug": "error-or-remainder-of-a-taylor-polynomial-approximation", "video_id": "wgkRH5Uoavk", "youtube_id": "wgkRH5Uoavk", "readable_id": "error-or-remainder-of-a-taylor-polynomial-approximation"}, "puJN5OuzXeY": {"duration": 468, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/free-energy-and-cell-potential-edited/", "keywords": "", "id": "puJN5OuzXeY", "title": "Free energy and cell potential", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/puJN5OuzXeY.mp4/puJN5OuzXeY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/puJN5OuzXeY.mp4/puJN5OuzXeY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/puJN5OuzXeY.m3u8/puJN5OuzXeY.m3u8"}, "slug": "free-energy-and-cell-potential-edited", "video_id": "puJN5OuzXeY", "youtube_id": "puJN5OuzXeY", "readable_id": "free-energy-and-cell-potential-edited"}, "fzF2AgL35qE": {"duration": 473, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions/what-is-a-tonsillectomy/", "keywords": "", "id": "fzF2AgL35qE", "title": "What is a tonsillectomy?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fzF2AgL35qE.mp4/fzF2AgL35qE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fzF2AgL35qE.mp4/fzF2AgL35qE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fzF2AgL35qE.m3u8/fzF2AgL35qE.m3u8"}, "slug": "what-is-a-tonsillectomy", "video_id": "fzF2AgL35qE", "youtube_id": "fzF2AgL35qE", "readable_id": "what-is-a-tonsillectomy"}, "7XaftdE_h60": {"duration": 471, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/flow-through-the-heart/", "keywords": "", "id": "7XaftdE_h60", "title": "Flow through the heart", "description": "Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7XaftdE_h60.mp4/7XaftdE_h60.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7XaftdE_h60.mp4/7XaftdE_h60.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7XaftdE_h60.m3u8/7XaftdE_h60.m3u8"}, "slug": "flow-through-the-heart", "video_id": "7XaftdE_h60", "youtube_id": "7XaftdE_h60", "readable_id": "flow-through-the-heart"}, "nENvd7Zj1Qs": {"duration": 68, "path": "khan/test-prep/ap-art-history/west-and-central-asia/bamiyan-ten-years-on/", "keywords": "", "id": "nENvd7Zj1Qs", "title": "Bamiyan: Ten years on", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nENvd7Zj1Qs.mp4/nENvd7Zj1Qs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nENvd7Zj1Qs.mp4/nENvd7Zj1Qs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nENvd7Zj1Qs.m3u8/nENvd7Zj1Qs.m3u8"}, "slug": "bamiyan-ten-years-on", "video_id": "nENvd7Zj1Qs", "youtube_id": "nENvd7Zj1Qs", "readable_id": "bamiyan-ten-years-on"}, "LFA_qmGuY2A": {"duration": 355, "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/giorgione-the-tempest/", "keywords": "Giorgione", "id": "LFA_qmGuY2A", "title": "Giorgione, The Tempest", "description": "Giorgione, The Tempest, c. 1506-8 (Accademia, Venice) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LFA_qmGuY2A.mp4/LFA_qmGuY2A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LFA_qmGuY2A.mp4/LFA_qmGuY2A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LFA_qmGuY2A.m3u8/LFA_qmGuY2A.m3u8"}, "slug": "giorgione-the-tempest", "video_id": "LFA_qmGuY2A", "youtube_id": "LFA_qmGuY2A", "readable_id": "giorgione-the-tempest"}, "gqSpWPONekE": {"duration": 169, "path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/vincent-van-gogh-self-portrait-dedicated-to-paul-gauguin-1888/", "keywords": "Vincent van Gogh, Van Gogh, Paul Gauguin, Gauguin, Post-Impressionism, Self-Portrait, Fogg, Subjectivity", "id": "gqSpWPONekE", "title": "Van Gogh, Self-Portrait Dedicated to Paul Gauguin", "description": "Vincent van Gogh, Self-Portrait Dedicated to Paul Gauguin, 1888, oil on canvas, 24 x 19-11/16 inches (Fogg, Harvard Art Museums) Speakers: Dr. Beth Harris and Dr. Steven Zucker http://smarthistory.org/van-gogh-self-portrait-dedicated-to-paul-gauguin.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gqSpWPONekE.mp4/gqSpWPONekE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gqSpWPONekE.mp4/gqSpWPONekE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gqSpWPONekE.m3u8/gqSpWPONekE.m3u8"}, "slug": "vincent-van-gogh-self-portrait-dedicated-to-paul-gauguin-1888", "video_id": "gqSpWPONekE", "youtube_id": "gqSpWPONekE", "readable_id": "vincent-van-gogh-self-portrait-dedicated-to-paul-gauguin-1888"}, "UKM8BnpZr94": {"duration": 85, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/using-rotation-widget/", "keywords": "", "id": "UKM8BnpZr94", "title": "How to perform a rotation (example)", "description": "Sal shows how to perform a rotation on a pentagon using our interactive widget!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UKM8BnpZr94.mp4/UKM8BnpZr94.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UKM8BnpZr94.mp4/UKM8BnpZr94.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UKM8BnpZr94.m3u8/UKM8BnpZr94.m3u8"}, "slug": "using-rotation-widget", "video_id": "UKM8BnpZr94", "youtube_id": "UKM8BnpZr94", "readable_id": "using-rotation-widget"}, "MLj-PpvqlPs": {"duration": 66, "path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/charactermodeling3/", "keywords": "", "id": "MLj-PpvqlPs", "title": "3. Subdividing your own designs", "description": "Now you are ready to start subdividing your own shapes with more than 4 points!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MLj-PpvqlPs.mp4/MLj-PpvqlPs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MLj-PpvqlPs.mp4/MLj-PpvqlPs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MLj-PpvqlPs.m3u8/MLj-PpvqlPs.m3u8"}, "slug": "charactermodeling3", "video_id": "MLj-PpvqlPs", "youtube_id": "MLj-PpvqlPs", "readable_id": "charactermodeling3"}, "NZlJJ4a40Ww": {"duration": 176, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/pulmonary-hypertension-diagnosis-swan-ganz-catheterization/", "keywords": "", "id": "NZlJJ4a40Ww", "title": "Pulmonary hypertension diagnosis Swan Ganz catheterization", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NZlJJ4a40Ww.mp4/NZlJJ4a40Ww.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NZlJJ4a40Ww.mp4/NZlJJ4a40Ww.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NZlJJ4a40Ww.m3u8/NZlJJ4a40Ww.m3u8"}, "slug": "pulmonary-hypertension-diagnosis-swan-ganz-catheterization", "video_id": "NZlJJ4a40Ww", "youtube_id": "NZlJJ4a40Ww", "readable_id": "pulmonary-hypertension-diagnosis-swan-ganz-catheterization"}, "EV5dhv0A2wU": {"duration": 532, "path": "khan/math/integral-calculus/integration-techniques/trig_substitution/introduction-to-trigonometric-substitution/", "keywords": "", "id": "EV5dhv0A2wU", "title": "Introduction to trigonometric substitution", "description": "Introduction to trigonometric substitution", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EV5dhv0A2wU.mp4/EV5dhv0A2wU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EV5dhv0A2wU.mp4/EV5dhv0A2wU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EV5dhv0A2wU.m3u8/EV5dhv0A2wU.m3u8"}, "slug": "introduction-to-trigonometric-substitution", "video_id": "EV5dhv0A2wU", "youtube_id": "EV5dhv0A2wU", "readable_id": "introduction-to-trigonometric-substitution"}, "S34NM0Po0eA": {"duration": 300, "path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/fractional-exponents-with-numerators-other-than-1/", "keywords": "", "id": "S34NM0Po0eA", "title": "How to evaluate numerical expressions with a rational exponent (example)", "description": "Sal shows how to evaluate 64^(2/3) and (8/27)^(-2/3).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S34NM0Po0eA.mp4/S34NM0Po0eA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S34NM0Po0eA.mp4/S34NM0Po0eA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S34NM0Po0eA.m3u8/S34NM0Po0eA.m3u8"}, "slug": "fractional-exponents-with-numerators-other-than-1", "video_id": "S34NM0Po0eA", "youtube_id": "S34NM0Po0eA", "readable_id": "fractional-exponents-with-numerators-other-than-1"}, "6EdsBabSZ4g": {"duration": 798, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/plate-tectonics-evidence-of-plate-movement/", "keywords": "Plate, Tectonics, Evidence, of, movement, magnetic, field, marquee", "id": "6EdsBabSZ4g", "title": "Plate tectonics: Evidence of plate movement", "description": "Plate Tectonics -- Evidence of plate movement", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6EdsBabSZ4g.mp4/6EdsBabSZ4g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6EdsBabSZ4g.mp4/6EdsBabSZ4g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6EdsBabSZ4g.m3u8/6EdsBabSZ4g.m3u8"}, "slug": "plate-tectonics-evidence-of-plate-movement", "video_id": "6EdsBabSZ4g", "youtube_id": "6EdsBabSZ4g", "readable_id": "plate-tectonics-evidence-of-plate-movement"}, "g6nGcnVB8BM": {"duration": 262, "path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/solving-radical-equations-3/", "keywords": "U07_L3_T2_we3, Solving, Radical, Equations, CC_8_EE_2, CC_39336_A-REI_2", "id": "g6nGcnVB8BM", "title": "Solving radical equations 3", "description": "Solving Radical Equations 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g6nGcnVB8BM.mp4/g6nGcnVB8BM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g6nGcnVB8BM.mp4/g6nGcnVB8BM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g6nGcnVB8BM.m3u8/g6nGcnVB8BM.m3u8"}, "slug": "solving-radical-equations-3", "video_id": "g6nGcnVB8BM", "youtube_id": "g6nGcnVB8BM", "readable_id": "solving-radical-equations-3"}, "BHkw9_GWPJA": {"duration": 392, "path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/signal-detection-theory-part-1/", "keywords": "", "id": "BHkw9_GWPJA", "title": "Signal detection theory - part 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BHkw9_GWPJA.mp4/BHkw9_GWPJA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BHkw9_GWPJA.mp4/BHkw9_GWPJA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BHkw9_GWPJA.m3u8/BHkw9_GWPJA.m3u8"}, "slug": "signal-detection-theory-part-1", "video_id": "BHkw9_GWPJA", "youtube_id": "BHkw9_GWPJA", "readable_id": "signal-detection-theory-part-1"}, "eRImmzuExyg": {"duration": 640, "path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/wealth-destruction-2/", "keywords": "bailout, paulson, credit, crisis, bernanke, bubble, housing", "id": "eRImmzuExyg", "title": "Wealth destruction 2", "description": "How bubbles destroy wealth.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eRImmzuExyg.mp4/eRImmzuExyg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eRImmzuExyg.mp4/eRImmzuExyg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eRImmzuExyg.m3u8/eRImmzuExyg.m3u8"}, "slug": "wealth-destruction-2", "video_id": "eRImmzuExyg", "youtube_id": "eRImmzuExyg", "readable_id": "wealth-destruction-2"}, "XkD1RPDYWK8": {"duration": 836, "path": "khan/partner-content/big-history-project/what-is-big-history/welcome-to-big-history/bhp-big-bang-crashcourse/", "keywords": "", "id": "XkD1RPDYWK8", "title": "Crash Course Big History: The Big Bang", "description": "Crash Course is a fast, funny, irreverent look at history. In this episode, brothers John and Hank Green gives us their take on what makes Big History so darn important.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XkD1RPDYWK8.mp4/XkD1RPDYWK8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XkD1RPDYWK8.mp4/XkD1RPDYWK8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XkD1RPDYWK8.m3u8/XkD1RPDYWK8.m3u8"}, "slug": "bhp-big-bang-crashcourse", "video_id": "XkD1RPDYWK8", "youtube_id": "XkD1RPDYWK8", "readable_id": "bhp-big-bang-crashcourse"}, "3rkDpqp-mw0": {"duration": 568, "path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/solubility-from-the-solubility-product-constant/", "keywords": "", "id": "3rkDpqp-mw0", "title": "Solubility from the solubility product constant", "description": "Calculating the solubility of copper(II) hydroxide from Ksp using an ICE table.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3rkDpqp-mw0.mp4/3rkDpqp-mw0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3rkDpqp-mw0.mp4/3rkDpqp-mw0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3rkDpqp-mw0.m3u8/3rkDpqp-mw0.m3u8"}, "slug": "solubility-from-the-solubility-product-constant", "video_id": "3rkDpqp-mw0", "youtube_id": "3rkDpqp-mw0", "readable_id": "solubility-from-the-solubility-product-constant"}, "SEtkn9S-WHY": {"duration": 675, "path": "khan/test-prep/gmat/problem-solving/gmat-math-27/", "keywords": "gmat, math, problem, solving", "id": "SEtkn9S-WHY", "title": "GMAT: Math 27", "description": "138-142, pg. 171", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SEtkn9S-WHY.mp4/SEtkn9S-WHY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SEtkn9S-WHY.mp4/SEtkn9S-WHY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SEtkn9S-WHY.m3u8/SEtkn9S-WHY.m3u8"}, "slug": "gmat-math-27", "video_id": "SEtkn9S-WHY", "youtube_id": "SEtkn9S-WHY", "readable_id": "gmat-math-27"}, "BAFOOQxiwkU": {"duration": 369, "path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/evaluating-power-series-for-mystery-function/", "keywords": "", "id": "BAFOOQxiwkU", "title": "Evaluating power series for mystery function", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BAFOOQxiwkU.mp4/BAFOOQxiwkU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BAFOOQxiwkU.mp4/BAFOOQxiwkU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BAFOOQxiwkU.m3u8/BAFOOQxiwkU.m3u8"}, "slug": "evaluating-power-series-for-mystery-function", "video_id": "BAFOOQxiwkU", "youtube_id": "BAFOOQxiwkU", "readable_id": "evaluating-power-series-for-mystery-function"}, "eK7Gp6AWnuY": {"duration": 438, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/estrogen/", "keywords": "", "id": "eK7Gp6AWnuY", "title": "Estrogen", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eK7Gp6AWnuY.mp4/eK7Gp6AWnuY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eK7Gp6AWnuY.mp4/eK7Gp6AWnuY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eK7Gp6AWnuY.m3u8/eK7Gp6AWnuY.m3u8"}, "slug": "estrogen", "video_id": "eK7Gp6AWnuY", "youtube_id": "eK7Gp6AWnuY", "readable_id": "estrogen"}, "ICQCUTiC0mI": {"duration": 190, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/thinking-aloud/", "keywords": "body, drawing, motion, paper, touch, writing, youth, Europe", "id": "ICQCUTiC0mI", "title": "Michelangelo, Studies for the Libyan Sibyl (recto); Studies for the Libyan Sibyl and a small Sketch for a Seated Figure (verso)", "description": "Met curator Carmen Bambach on the presence of genius in Michelangelo Buonarroti\u2019s Studies for the Libyan Sibyl (recto); Studies for the Libyan Sibyl and a small Sketch for a Seated Figure (verso),\u00a0\u00a0c.\u00a01510\u201311.\n\nThis is the most magnificent drawing by Michelangelo in the United States. A male studio assistant posed for the anatomical study, which was preparatory for the Libyan Sibyl, one of the female seers frescoed on the ceiling of the Sistine Chapel (Vatican Palace) in 1508-12. In the fresco, the figure is clothed except for her powerful shoulders and arms, and has an elaborately braided coiffure. Michelangelo used the present sheet to explore the elements that were crucial in the elegant resolution of the figure's pose, especially the counterpoint twist of shoulders and hips and the manner of weight-bearing on her toe. Recent research shows that this sheet of studies was owned by the Buonarroti family soon after Michelangelo's death. The \"no. 21\" inscribed on the verso of the sheet (at lower center) fits precisely into a numerical sequence found on many other drawings by the artist that have this early Buonarroti family provenance.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ICQCUTiC0mI.mp4/ICQCUTiC0mI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ICQCUTiC0mI.mp4/ICQCUTiC0mI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ICQCUTiC0mI.m3u8/ICQCUTiC0mI.m3u8"}, "slug": "thinking-aloud", "video_id": "ICQCUTiC0mI", "youtube_id": "ICQCUTiC0mI", "readable_id": "thinking-aloud"}, "XaqsqtWiJMw": {"duration": 789, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pleural-effusion/pleural-effusion-diagnosis-and-treatment/", "keywords": "", "id": "XaqsqtWiJMw", "title": "Pleural effusion diagnosis and treatment", "description": "How do we know a patient has a pleural effusion? Health professionals use x-rays, and computed tomography (CT scans) to look for extra fluid inside the body. Learn how pleural effusions are treated using techniques such as a thoracentesis, pleurodesis, and pleuroperitoneal shunts.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XaqsqtWiJMw.mp4/XaqsqtWiJMw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XaqsqtWiJMw.mp4/XaqsqtWiJMw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XaqsqtWiJMw.m3u8/XaqsqtWiJMw.m3u8"}, "slug": "pleural-effusion-diagnosis-and-treatment", "video_id": "XaqsqtWiJMw", "youtube_id": "XaqsqtWiJMw", "readable_id": "pleural-effusion-diagnosis-and-treatment"}, "jH5qflAe3C8": {"duration": 743, "path": "khan/math/differential-equations/first-order-differential-equations/modeling-with-differential-equations/applying-newtons-law-of-cooling-to-warm-oatmeal/", "keywords": "", "id": "jH5qflAe3C8", "title": "Applying Newton's Law of Cooling to warm oatmeal", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jH5qflAe3C8.mp4/jH5qflAe3C8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jH5qflAe3C8.mp4/jH5qflAe3C8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jH5qflAe3C8.m3u8/jH5qflAe3C8.m3u8"}, "slug": "applying-newtons-law-of-cooling-to-warm-oatmeal", "video_id": "jH5qflAe3C8", "youtube_id": "jH5qflAe3C8", "readable_id": "applying-newtons-law-of-cooling-to-warm-oatmeal"}, "1S4DtuMY88I": {"duration": 597, "path": "khan/test-prep/mcat/physical-processes/sound/standing-waves-in-tubes-part-2/", "keywords": "", "id": "1S4DtuMY88I", "title": "Standing waves in tubes (part 2)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1S4DtuMY88I.mp4/1S4DtuMY88I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1S4DtuMY88I.mp4/1S4DtuMY88I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1S4DtuMY88I.m3u8/1S4DtuMY88I.m3u8"}, "slug": "standing-waves-in-tubes-part-2", "video_id": "1S4DtuMY88I", "youtube_id": "1S4DtuMY88I", "readable_id": "standing-waves-in-tubes-part-2"}, "HGsg7OZiHhE": {"duration": 123, "path": "khan/science/discoveries-projects/discovery-lab-2012/khan-dl-week-2-arshia/", "keywords": "", "id": "HGsg7OZiHhE", "title": "DLab: A student presents her Lego robot", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HGsg7OZiHhE.mp4/HGsg7OZiHhE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HGsg7OZiHhE.mp4/HGsg7OZiHhE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HGsg7OZiHhE.m3u8/HGsg7OZiHhE.m3u8"}, "slug": "khan-dl-week-2-arshia", "video_id": "HGsg7OZiHhE", "youtube_id": "HGsg7OZiHhE", "readable_id": "khan-dl-week-2-arshia"}, "06z7Q8TWPyU": {"duration": 615, "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/cosmic-background-radiation-2/", "keywords": "Cosmic, Background, Radiation, Microwave, redshift, big, bang", "id": "06z7Q8TWPyU", "title": "Cosmic background radiation 2", "description": "Cosmic Background Radiation 2 - Redshift of the Cosmic Background Radiation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/06z7Q8TWPyU.mp4/06z7Q8TWPyU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/06z7Q8TWPyU.mp4/06z7Q8TWPyU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/06z7Q8TWPyU.m3u8/06z7Q8TWPyU.m3u8"}, "slug": "cosmic-background-radiation-2", "video_id": "06z7Q8TWPyU", "youtube_id": "06z7Q8TWPyU", "readable_id": "cosmic-background-radiation-2"}, "LHnHXS51J4E": {"duration": 237, "path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/instincts-arousal-needs-drives-drive-reduction-and-cognitive-theories/", "keywords": "", "id": "LHnHXS51J4E", "title": "Instincts, Arousal, Needs, Drives: Drive-Reduction and Cognitive Theories", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LHnHXS51J4E.mp4/LHnHXS51J4E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LHnHXS51J4E.mp4/LHnHXS51J4E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LHnHXS51J4E.m3u8/LHnHXS51J4E.m3u8"}, "slug": "instincts-arousal-needs-drives-drive-reduction-and-cognitive-theories", "video_id": "LHnHXS51J4E", "youtube_id": "LHnHXS51J4E", "readable_id": "instincts-arousal-needs-drives-drive-reduction-and-cognitive-theories"}, "OFBI_rNDZE0": {"duration": 173, "path": "khan/math/precalculus/vectors-precalc/magnitude-direction/scaling-unit-vector/", "keywords": "", "id": "OFBI_rNDZE0", "title": "Scaling up a unit vector", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OFBI_rNDZE0.mp4/OFBI_rNDZE0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OFBI_rNDZE0.mp4/OFBI_rNDZE0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OFBI_rNDZE0.m3u8/OFBI_rNDZE0.m3u8"}, "slug": "scaling-unit-vector", "video_id": "OFBI_rNDZE0", "youtube_id": "OFBI_rNDZE0", "readable_id": "scaling-unit-vector"}, "cczABrLd_uA": {"duration": 431, "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/monopolist-optimizing-price-part-1-total-revenue/", "keywords": "microeconomics", "id": "cczABrLd_uA", "title": "Monopolist optimizing price: Total revenue.", "description": "Starting to think about how a monopolist would rationally optimize profits", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cczABrLd_uA.mp4/cczABrLd_uA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cczABrLd_uA.mp4/cczABrLd_uA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cczABrLd_uA.m3u8/cczABrLd_uA.m3u8"}, "slug": "monopolist-optimizing-price-part-1-total-revenue", "video_id": "cczABrLd_uA", "youtube_id": "cczABrLd_uA", "readable_id": "monopolist-optimizing-price-part-1-total-revenue"}, "-rke7RmxwfY": {"duration": 422, "path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/conserving-henri-matisses-the-swimming-pool/", "keywords": "Matisse", "id": "-rke7RmxwfY", "title": "Conserving Henri Matisse's \"The Swimming Pool\"", "description": "Explore the process of conserving Matisse's The Swimming Pool, one of the artist's most beloved cut-out masterpieces and a centerpiece of the Henri Matisse: The Cut-Outs exhibition at MoMA.\u00a0Create your own cut-outs and collages and learn about Matisse's life in the online courses Modern Art: 1880-1945 and Experimenting with Collage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-rke7RmxwfY.mp4/-rke7RmxwfY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-rke7RmxwfY.mp4/-rke7RmxwfY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-rke7RmxwfY.m3u8/-rke7RmxwfY.m3u8"}, "slug": "conserving-henri-matisses-the-swimming-pool", "video_id": "-rke7RmxwfY", "youtube_id": "-rke7RmxwfY", "readable_id": "conserving-henri-matisses-the-swimming-pool"}, "X3bqQI7-sCg": {"duration": 732, "path": "khan/humanities/history/euro-hist/wo/1941-axis-momentum-accelerates-in-ww2/", "keywords": "", "id": "X3bqQI7-sCg", "title": "1941 Axis momentum accelerates in WW2", "description": "In 1941, the Axis gains further momentum with control of most of Continential Europe. Hitler decides to break pact and invade Stalin's Soviet Union. United States enters World War II after Japanese attack on Pearl Harbor.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X3bqQI7-sCg.mp4/X3bqQI7-sCg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X3bqQI7-sCg.mp4/X3bqQI7-sCg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X3bqQI7-sCg.m3u8/X3bqQI7-sCg.m3u8"}, "slug": "1941-axis-momentum-accelerates-in-ww2", "video_id": "X3bqQI7-sCg", "youtube_id": "X3bqQI7-sCg", "readable_id": "1941-axis-momentum-accelerates-in-ww2"}, "kpCJyQ2usJ4": {"duration": 607, "path": "khan/math/algebra/introduction-to-algebra/overview_hist_alg/the-beauty-of-algebra/", "keywords": "algebra, why, applications, marquee", "id": "kpCJyQ2usJ4", "title": "The beauty of algebra", "description": "Why the abstraction of mathematics is so fundamental.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kpCJyQ2usJ4.mp4/kpCJyQ2usJ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kpCJyQ2usJ4.mp4/kpCJyQ2usJ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kpCJyQ2usJ4.m3u8/kpCJyQ2usJ4.m3u8"}, "slug": "the-beauty-of-algebra", "video_id": "kpCJyQ2usJ4", "youtube_id": "kpCJyQ2usJ4", "readable_id": "the-beauty-of-algebra"}, "-XRQovTI04Q": {"duration": 331, "path": "khan/math/integral-calculus/sequences_series_approx_calc/seq-conv-diverg/proving-a-sequence-converges/", "keywords": "", "id": "-XRQovTI04Q", "title": "Proving a sequence converges", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-XRQovTI04Q.mp4/-XRQovTI04Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-XRQovTI04Q.mp4/-XRQovTI04Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-XRQovTI04Q.m3u8/-XRQovTI04Q.m3u8"}, "slug": "proving-a-sequence-converges", "video_id": "-XRQovTI04Q", "youtube_id": "-XRQovTI04Q", "readable_id": "proving-a-sequence-converges"}, "u1eGSL6J6Fo": {"duration": 983, "path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/sp3-hybridized-orbitals-and-sigma-bonds/", "keywords": "sp3, Hybridized, Orbitals, and, Sigma, Bonds", "id": "u1eGSL6J6Fo", "title": "sp3 hybridized orbitals and sigma bonds", "description": "sp3 Hybridized Orbitals and Sigma Bonds", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u1eGSL6J6Fo.mp4/u1eGSL6J6Fo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u1eGSL6J6Fo.mp4/u1eGSL6J6Fo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u1eGSL6J6Fo.m3u8/u1eGSL6J6Fo.m3u8"}, "slug": "sp3-hybridized-orbitals-and-sigma-bonds", "video_id": "u1eGSL6J6Fo", "youtube_id": "u1eGSL6J6Fo", "readable_id": "sp3-hybridized-orbitals-and-sigma-bonds"}, "_nzaMQKpPLM": {"duration": 782, "path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/ir-spectra-for-hydrocarbons/", "keywords": "", "id": "_nzaMQKpPLM", "title": "IR spectra for hydrocarbons", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_nzaMQKpPLM.mp4/_nzaMQKpPLM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_nzaMQKpPLM.mp4/_nzaMQKpPLM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_nzaMQKpPLM.m3u8/_nzaMQKpPLM.m3u8"}, "slug": "ir-spectra-for-hydrocarbons", "video_id": "_nzaMQKpPLM", "youtube_id": "_nzaMQKpPLM", "readable_id": "ir-spectra-for-hydrocarbons"}, "VtqrKxJmBn4": {"duration": 793, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/hypertrophic-cardiomyopathy-pathophysiology-and-diagnosis/", "keywords": "", "id": "VtqrKxJmBn4", "title": "Hypertrophic cardiomyopathy: Pathophysiology and diagnosis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VtqrKxJmBn4.mp4/VtqrKxJmBn4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VtqrKxJmBn4.mp4/VtqrKxJmBn4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VtqrKxJmBn4.m3u8/VtqrKxJmBn4.m3u8"}, "slug": "hypertrophic-cardiomyopathy-pathophysiology-and-diagnosis", "video_id": "VtqrKxJmBn4", "youtube_id": "VtqrKxJmBn4", "readable_id": "hypertrophic-cardiomyopathy-pathophysiology-and-diagnosis"}, "R1y2m2OB1x0": {"duration": 823, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/diagnosis-of-myocarditis-and-pericarditis-part-2/", "keywords": "", "id": "R1y2m2OB1x0", "title": "Diagnosis of myocarditis and pericarditis (part 2)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R1y2m2OB1x0.mp4/R1y2m2OB1x0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R1y2m2OB1x0.mp4/R1y2m2OB1x0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R1y2m2OB1x0.m3u8/R1y2m2OB1x0.m3u8"}, "slug": "diagnosis-of-myocarditis-and-pericarditis-part-2", "video_id": "R1y2m2OB1x0", "youtube_id": "R1y2m2OB1x0", "readable_id": "diagnosis-of-myocarditis-and-pericarditis-part-2"}, "d2cnQ5ahHgE": {"duration": 313, "path": "khan/math/algebra/linear_inequalities/compound_absolute_value_inequali/compund-inequalities-2/", "keywords": "u10_l3_t1_we2, Compund, Inequalities, CC_6_EE_8, CC_6_NS_6_c, CC_6_NS_7_a, CC_7_EE_4, CC_7_EE_4_b, CC_39336_A-CED_1, CC_39336_A-CED_3, CC_39336_A-REI_3", "id": "d2cnQ5ahHgE", "title": "Compound inequalities 2", "description": "Compound Inequalities 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d2cnQ5ahHgE.mp4/d2cnQ5ahHgE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d2cnQ5ahHgE.mp4/d2cnQ5ahHgE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d2cnQ5ahHgE.m3u8/d2cnQ5ahHgE.m3u8"}, "slug": "compund-inequalities-2", "video_id": "d2cnQ5ahHgE", "youtube_id": "d2cnQ5ahHgE", "readable_id": "compund-inequalities-2"}, "hAAIgNzBGg0": {"duration": 498, "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-5b/", "keywords": "AP, Advanced, Placement, exam", "id": "hAAIgNzBGg0", "title": "2011 Calculus AB free response #5b", "description": "Using the second derivative to judge whether an approximation with the tangent line is an overestimate or underestimate", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hAAIgNzBGg0.mp4/hAAIgNzBGg0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hAAIgNzBGg0.mp4/hAAIgNzBGg0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hAAIgNzBGg0.m3u8/hAAIgNzBGg0.m3u8"}, "slug": "2011-calculus-ab-free-response-5b", "video_id": "hAAIgNzBGg0", "youtube_id": "hAAIgNzBGg0", "readable_id": "2011-calculus-ab-free-response-5b"}, "qG3HnRccrQU": {"duration": 550, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons/sum-of-interior-angles-of-a-polygon/", "keywords": "Sum, of, Interior, Angles, Any, Polygon, t2", "id": "qG3HnRccrQU", "title": "Sum of interior angles of a polygon", "description": "Showing a generalized way to find the sum of the interior angles of any polygon", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qG3HnRccrQU.mp4/qG3HnRccrQU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qG3HnRccrQU.mp4/qG3HnRccrQU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qG3HnRccrQU.m3u8/qG3HnRccrQU.m3u8"}, "slug": "sum-of-interior-angles-of-a-polygon", "video_id": "qG3HnRccrQU", "youtube_id": "qG3HnRccrQU", "readable_id": "sum-of-interior-angles-of-a-polygon"}, "Zet3X0zLs9A": {"duration": 270, "path": "khan/test-prep/mcat/behavior/psychological-disorders/dissociative-identity-disorder/", "keywords": "Dissociation,Dissociative Identity Disorder (Disease Or Medical Condition),Health (Industry),Mental Illness (Disease Or Medical Condition)", "id": "Zet3X0zLs9A", "title": "Dissociative identity disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zet3X0zLs9A.mp4/Zet3X0zLs9A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zet3X0zLs9A.mp4/Zet3X0zLs9A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zet3X0zLs9A.m3u8/Zet3X0zLs9A.m3u8"}, "slug": "dissociative-identity-disorder", "video_id": "Zet3X0zLs9A", "youtube_id": "Zet3X0zLs9A", "readable_id": "dissociative-identity-disorder"}, "CcUBNRLDgrQ": {"duration": 108, "path": "khan/college-admissions/making-high-school-count/standardized-tests/deciding-to-retake-act/", "keywords": "", "id": "CcUBNRLDgrQ", "title": "Deciding whether to retake the ACT", "description": "Official ACT Website", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CcUBNRLDgrQ.mp4/CcUBNRLDgrQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CcUBNRLDgrQ.mp4/CcUBNRLDgrQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CcUBNRLDgrQ.m3u8/CcUBNRLDgrQ.m3u8"}, "slug": "deciding-to-retake-act", "video_id": "CcUBNRLDgrQ", "youtube_id": "CcUBNRLDgrQ", "readable_id": "deciding-to-retake-act"}, "H4BstqvgBow": {"duration": 232, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/decimal-to-binary/", "keywords": "", "id": "H4BstqvgBow", "title": "Converting from decimal to binary", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H4BstqvgBow.mp4/H4BstqvgBow.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H4BstqvgBow.mp4/H4BstqvgBow.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H4BstqvgBow.m3u8/H4BstqvgBow.m3u8"}, "slug": "decimal-to-binary", "video_id": "H4BstqvgBow", "youtube_id": "H4BstqvgBow", "readable_id": "decimal-to-binary"}, "JaScdH47PYg": {"duration": 152, "path": "khan/math/pre-algebra/decimals-pre-alg/percent-intro-pre-alg/identifying-percent-amount-and-base/", "keywords": "u5_l2_t1_we1, Identifying, Percent, Amount, and, Base, CC_6_RP_3_c", "id": "JaScdH47PYg", "title": "Identifying percent amount and base", "description": "Identifying Percent Amount and Base", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JaScdH47PYg.mp4/JaScdH47PYg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JaScdH47PYg.mp4/JaScdH47PYg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JaScdH47PYg.m3u8/JaScdH47PYg.m3u8"}, "slug": "identifying-percent-amount-and-base", "video_id": "JaScdH47PYg", "youtube_id": "JaScdH47PYg", "readable_id": "identifying-percent-amount-and-base"}, "6bsu9w9iIQY": {"duration": 97, "path": "khan/science/discoveries-projects/discoveries/batteries/electrolye-temperature-test/", "keywords": "electrolyte", "id": "6bsu9w9iIQY", "title": "Electrolyte (temperature test)", "description": "Here we experiment with hot vs. cold vinegar as our electrolyte. Does the deflection in our galvanometer depend on temperature? Why?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6bsu9w9iIQY.mp4/6bsu9w9iIQY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6bsu9w9iIQY.mp4/6bsu9w9iIQY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6bsu9w9iIQY.m3u8/6bsu9w9iIQY.m3u8"}, "slug": "electrolye-temperature-test", "video_id": "6bsu9w9iIQY", "youtube_id": "6bsu9w9iIQY", "readable_id": "electrolye-temperature-test"}, "gAbadNuQEjI": {"duration": 859, "path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/vector-transformations/", "keywords": "vector, transformations, linear, algebra", "id": "gAbadNuQEjI", "title": "Vector transformations", "description": "Introduction to the notion of vector transformations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gAbadNuQEjI.mp4/gAbadNuQEjI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gAbadNuQEjI.mp4/gAbadNuQEjI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gAbadNuQEjI.m3u8/gAbadNuQEjI.m3u8"}, "slug": "vector-transformations", "video_id": "gAbadNuQEjI", "youtube_id": "gAbadNuQEjI", "readable_id": "vector-transformations"}, "Yv94eGD7cUU": {"duration": 372, "path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/central-dogma-revisited/", "keywords": "", "id": "Yv94eGD7cUU", "title": "Central dogma - revisited", "description": "New discoveries have expanded on or even contradicted the original Central dogma of molecular biology as proposed by Watson and Crick. These discoveries include multiple alternate pathways of the molecules as well as different types of RNA that you'll need to know. By Tracy Kovach.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Yv94eGD7cUU.mp4/Yv94eGD7cUU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Yv94eGD7cUU.mp4/Yv94eGD7cUU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Yv94eGD7cUU.m3u8/Yv94eGD7cUU.m3u8"}, "slug": "central-dogma-revisited", "video_id": "Yv94eGD7cUU", "youtube_id": "Yv94eGD7cUU", "readable_id": "central-dogma-revisited"}, "mKsKU0BAiRM": {"duration": 137, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-ones-tens/comparing-adding-1-and-10/", "keywords": "education,online learning,learning,lessons", "id": "mKsKU0BAiRM", "title": "Adding 1 vs. adding 10", "description": "Let's think about the difference between adding 1 and adding 10.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mKsKU0BAiRM.mp4/mKsKU0BAiRM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mKsKU0BAiRM.mp4/mKsKU0BAiRM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mKsKU0BAiRM.m3u8/mKsKU0BAiRM.m3u8"}, "slug": "comparing-adding-1-and-10", "video_id": "mKsKU0BAiRM", "youtube_id": "mKsKU0BAiRM", "readable_id": "comparing-adding-1-and-10"}, "u6O0YHyarlI": {"duration": 716, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-proof-by-contradiction/", "keywords": "geometry, proof, by, contradiction", "id": "u6O0YHyarlI", "title": "CA Geometry: Proof by contradiction", "description": "4-6, proof by contradiction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u6O0YHyarlI.mp4/u6O0YHyarlI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u6O0YHyarlI.mp4/u6O0YHyarlI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u6O0YHyarlI.m3u8/u6O0YHyarlI.m3u8"}, "slug": "ca-geometry-proof-by-contradiction", "video_id": "u6O0YHyarlI", "youtube_id": "u6O0YHyarlI", "readable_id": "ca-geometry-proof-by-contradiction"}, "VjLEoo3hIoM": {"duration": 398, "path": "khan/math/precalculus/prob_comb/dependent_events_precalc/introduction-to-dependent-probability/", "keywords": "dependent, replacement, probability, independent, events", "id": "VjLEoo3hIoM", "title": "Dependent probability introduction", "description": "Let's get you started with a great explanation of dependent probability using a scenario involving a casino game.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VjLEoo3hIoM.mp4/VjLEoo3hIoM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VjLEoo3hIoM.mp4/VjLEoo3hIoM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VjLEoo3hIoM.m3u8/VjLEoo3hIoM.m3u8"}, "slug": "introduction-to-dependent-probability", "video_id": "VjLEoo3hIoM", "youtube_id": "VjLEoo3hIoM", "readable_id": "introduction-to-dependent-probability"}, "nMrJ6nbOQhQ": {"duration": 535, "path": "khan/math/integral-calculus/integration-techniques/trig_substitution/trig-and-u-substitution-together-part-1/", "keywords": "", "id": "nMrJ6nbOQhQ", "title": "Trig and u substitution together (part 1)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nMrJ6nbOQhQ.mp4/nMrJ6nbOQhQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nMrJ6nbOQhQ.mp4/nMrJ6nbOQhQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nMrJ6nbOQhQ.m3u8/nMrJ6nbOQhQ.m3u8"}, "slug": "trig-and-u-substitution-together-part-1", "video_id": "nMrJ6nbOQhQ", "youtube_id": "nMrJ6nbOQhQ", "readable_id": "trig-and-u-substitution-together-part-1"}, "lSoaMCNKfAg": {"duration": 726, "path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/linear-algebra-transpose-of-a-vector/", "keywords": "matrix, vector, transpose", "id": "lSoaMCNKfAg", "title": "Transpose of a vector", "description": "Transpose of a column vector. Matrix-matrix products using vectors", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lSoaMCNKfAg.mp4/lSoaMCNKfAg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lSoaMCNKfAg.mp4/lSoaMCNKfAg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lSoaMCNKfAg.m3u8/lSoaMCNKfAg.m3u8"}, "slug": "linear-algebra-transpose-of-a-vector", "video_id": "lSoaMCNKfAg", "youtube_id": "lSoaMCNKfAg", "readable_id": "linear-algebra-transpose-of-a-vector"}, "jJyRrIZ595c": {"duration": 623, "path": "khan/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation/complex-roots-of-the-characteristic-equations-2/", "keywords": "complex, roots, characteristic, equation, differential, equations", "id": "jJyRrIZ595c", "title": "Complex roots of the characteristic equations 2", "description": "What happens when the characteristic equation has complex roots?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jJyRrIZ595c.mp4/jJyRrIZ595c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jJyRrIZ595c.mp4/jJyRrIZ595c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jJyRrIZ595c.m3u8/jJyRrIZ595c.m3u8"}, "slug": "complex-roots-of-the-characteristic-equations-2", "video_id": "jJyRrIZ595c", "youtube_id": "jJyRrIZ595c", "readable_id": "complex-roots-of-the-characteristic-equations-2"}, "XtAB9GOfLiM": {"duration": 252, "path": "khan/science/physics/two-dimensional-motion/optimal-projectile-angle/optimal-angle-for-a-projectile-part-2-hangtime/", "keywords": "Optimal, angle, for, projectile, part, Hangtime", "id": "XtAB9GOfLiM", "title": "Optimal angle for a projectile part 2: Hangtime", "description": "Optimal angle for a projectile part 2 - Hangtime", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XtAB9GOfLiM.mp4/XtAB9GOfLiM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XtAB9GOfLiM.mp4/XtAB9GOfLiM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XtAB9GOfLiM.m3u8/XtAB9GOfLiM.m3u8"}, "slug": "optimal-angle-for-a-projectile-part-2-hangtime", "video_id": "XtAB9GOfLiM", "youtube_id": "XtAB9GOfLiM", "readable_id": "optimal-angle-for-a-projectile-part-2-hangtime"}, "B2dCeTPDEKY": {"duration": 152, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/the-choice/", "keywords": "canvas, memory, painting, touch, Europe", "id": "B2dCeTPDEKY", "title": "Rembrandt, Aristotle with a Bust of Homer", "description": "Met curator Walter Liedtke on reflection in Rembrandt van Rijn\u2019s Aristotle with a Bust of Homer, 1653\n\nAristotle (384\u2013322 B.C.E.) rests his hand reflectively on a bust of Homer, the blind epic poet of the Iliad and the Odyssey. A medallion representing Alexander the Great, whom Aristotle tutored, hangs from the heavy gold chain. The philosopher contemplates material rewards as opposed to spiritual values, with the play of light and shadow on his features suggesting the motions of his mind. Painted for the great Sicilian collector Antonio Ruffo, the picture also refers to Aristotle's comparison of touch and sight as a means of acquiring knowledge.\u00a0\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/B2dCeTPDEKY.mp4/B2dCeTPDEKY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/B2dCeTPDEKY.mp4/B2dCeTPDEKY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/B2dCeTPDEKY.m3u8/B2dCeTPDEKY.m3u8"}, "slug": "the-choice", "video_id": "B2dCeTPDEKY", "youtube_id": "B2dCeTPDEKY", "readable_id": "the-choice"}, "pQWwP7YYH6o": {"duration": 841, "path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/carnot-efficiency-2-reversing-the-cycle/", "keywords": "thermodynamics, carnot, entropy", "id": "pQWwP7YYH6o", "title": "Carnot efficiency 2: Reversing the cycle", "description": "Seeing how we can scale and or reverse a Carnot Engine (to make a refrigerator)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pQWwP7YYH6o.mp4/pQWwP7YYH6o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pQWwP7YYH6o.mp4/pQWwP7YYH6o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pQWwP7YYH6o.m3u8/pQWwP7YYH6o.m3u8"}, "slug": "carnot-efficiency-2-reversing-the-cycle", "video_id": "pQWwP7YYH6o", "youtube_id": "pQWwP7YYH6o", "readable_id": "carnot-efficiency-2-reversing-the-cycle"}, "a-R8qpea6lc": {"duration": 195, "path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/us-and-japanese-quantitative-easing/", "keywords": "bernanke, federal, reserve", "id": "a-R8qpea6lc", "title": "US and Japanese quantitative easing", "description": "Comparing quantitative easing in Japan to \"credit easing\" in the United States", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a-R8qpea6lc.mp4/a-R8qpea6lc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a-R8qpea6lc.mp4/a-R8qpea6lc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a-R8qpea6lc.m3u8/a-R8qpea6lc.m3u8"}, "slug": "us-and-japanese-quantitative-easing", "video_id": "a-R8qpea6lc", "youtube_id": "a-R8qpea6lc", "readable_id": "us-and-japanese-quantitative-easing"}, "xGE3sEz6U9Y": {"duration": 682, "path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/weak-base-equilibrium/", "keywords": "", "id": "xGE3sEz6U9Y", "title": "Weak base equilibrium", "description": "Quick overview of Kb and pKb. Examples of calculating the pH of a weak base solution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xGE3sEz6U9Y.mp4/xGE3sEz6U9Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xGE3sEz6U9Y.mp4/xGE3sEz6U9Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xGE3sEz6U9Y.m3u8/xGE3sEz6U9Y.m3u8"}, "slug": "weak-base-equilibrium", "video_id": "xGE3sEz6U9Y", "youtube_id": "xGE3sEz6U9Y", "readable_id": "weak-base-equilibrium"}, "NaAwVrOEyss": {"duration": 611, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/neuron-graded-potential-mechanism/", "keywords": "", "id": "NaAwVrOEyss", "title": "Neuron graded potential mechanism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NaAwVrOEyss.mp4/NaAwVrOEyss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NaAwVrOEyss.mp4/NaAwVrOEyss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NaAwVrOEyss.m3u8/NaAwVrOEyss.m3u8"}, "slug": "neuron-graded-potential-mechanism", "video_id": "NaAwVrOEyss", "youtube_id": "NaAwVrOEyss", "readable_id": "neuron-graded-potential-mechanism"}, "PPyqEsyVmIQ": {"duration": 244, "path": "khan/humanities/ancient-art-civilizations/roman/wall-painting/painted-garden-villa-of-livia/", "keywords": "Roman, Painting, First Style, Second Style, 1st Style, 2nd Style, Garden, Villa, Livia, fresco, 30 B.C.E., Museo Nazionale Romano, Palazzo Massimo, Rome, triclinium, Prima Porta, Augustus, dining room, below ground, archaeology, excavation, umbrella pine, oak, red fir, quince, pomegranate, myrtle, oleander, date palm, strawberry, laurel, viburnum, holm oak, boxwood, cypress, ivy, acanthus, rose, poppie, chrysanthemum, chamomile, fern, violet, iris, art history, smarthistory, Khan Academy", "id": "PPyqEsyVmIQ", "title": "Empire: Painted Garden, Villa of Livia", "description": "Painted Garden, Villa of Livia, fresco, 30-20 B.C.E. (Museo Nazionale Romano, Palazzo Massimo, Rome) Plant species include: umbrella pine, oak, red fir, quince, pomegranate, myrtle, oleander, date palm, strawberry, laurel, viburnum, holm oak, boxwood, cypress, ivy, acanthus, rose, poppy, chrysanthemum, chamomile, fern, violet, and iris.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PPyqEsyVmIQ.mp4/PPyqEsyVmIQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PPyqEsyVmIQ.mp4/PPyqEsyVmIQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PPyqEsyVmIQ.m3u8/PPyqEsyVmIQ.m3u8"}, "slug": "painted-garden-villa-of-livia", "video_id": "PPyqEsyVmIQ", "youtube_id": "PPyqEsyVmIQ", "readable_id": "painted-garden-villa-of-livia"}, "RaeSwi80g3Q": {"duration": 122, "path": "khan/humanities/becoming-modern/symbolism/moma-tiffany-vase/", "keywords": "", "id": "RaeSwi80g3Q", "title": "Louis Comfort Tiffany, Vase", "description": "For more information please visit\u00a0http://www.moma.org/1913", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RaeSwi80g3Q.mp4/RaeSwi80g3Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RaeSwi80g3Q.mp4/RaeSwi80g3Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RaeSwi80g3Q.m3u8/RaeSwi80g3Q.m3u8"}, "slug": "moma-tiffany-vase", "video_id": "RaeSwi80g3Q", "youtube_id": "RaeSwi80g3Q", "readable_id": "moma-tiffany-vase"}, "N8GQQJZQrUc": {"duration": 63, "path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-viscosity/", "keywords": "", "id": "N8GQQJZQrUc", "title": "Art Terms in Action: Viscosity", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N8GQQJZQrUc.mp4/N8GQQJZQrUc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N8GQQJZQrUc.mp4/N8GQQJZQrUc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N8GQQJZQrUc.m3u8/N8GQQJZQrUc.m3u8"}, "slug": "moma-art-term-viscosity", "video_id": "N8GQQJZQrUc", "youtube_id": "N8GQQJZQrUc", "readable_id": "moma-art-term-viscosity"}, "ceM2u6IABWU": {"duration": 224, "path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-20-22/", "keywords": "CAHSEE, practice, california, high, school, exit, examination", "id": "ceM2u6IABWU", "title": "CAHSEE practice: Problems 20-22", "description": "CAHSEE Practice: Problems 20-22", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ceM2u6IABWU.mp4/ceM2u6IABWU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ceM2u6IABWU.mp4/ceM2u6IABWU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ceM2u6IABWU.m3u8/ceM2u6IABWU.m3u8"}, "slug": "cahsee-practice-problems-20-22", "video_id": "ceM2u6IABWU", "youtube_id": "ceM2u6IABWU", "readable_id": "cahsee-practice-problems-20-22"}, "pjrI91J6jOw": {"duration": 254, "path": "khan/math/recreational-math/vi-hart/thanksgiving-math/thanksgiving-turduckenen-duckenen/", "keywords": "marquee", "id": "pjrI91J6jOw", "title": "Thanksgiving turduckenen-duckenen", "description": "Forget turducken... I'm stuffing my turkey with two ducks, stuffed with four hens, stuffed with eight quail eggs. Honestly, I do not recommend trying this yourself.\n\nSo what's your favourite naming scheme: breadth-first, depth-first, or inordered binary tree traversal?\n\nMathed Potatoes: http://youtu.be/F5RyVWI4Onk\nGreen Bean Matherole: http://youtu.be/XwIs1nlDQ2I\nBorromean Onion Rings: http://youtu.be/4tsjCND2ZfM", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pjrI91J6jOw.mp4/pjrI91J6jOw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pjrI91J6jOw.mp4/pjrI91J6jOw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pjrI91J6jOw.m3u8/pjrI91J6jOw.m3u8"}, "slug": "thanksgiving-turduckenen-duckenen", "video_id": "pjrI91J6jOw", "youtube_id": "pjrI91J6jOw", "readable_id": "thanksgiving-turduckenen-duckenen"}, "04gQ0bQu6xk": {"duration": 736, "path": "khan/science/biology/cellular-molecular-biology/meiosis/chromosomal-crossover-in-meiosis-i/", "keywords": "", "id": "04gQ0bQu6xk", "title": "Chromosomal crossover in Meiosis I", "description": "Chromosomal crossover in Meiosis I", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/04gQ0bQu6xk.mp4/04gQ0bQu6xk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/04gQ0bQu6xk.mp4/04gQ0bQu6xk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/04gQ0bQu6xk.m3u8/04gQ0bQu6xk.m3u8"}, "slug": "chromosomal-crossover-in-meiosis-i", "video_id": "04gQ0bQu6xk", "youtube_id": "04gQ0bQu6xk", "readable_id": "chromosomal-crossover-in-meiosis-i"}, "iokGgmrOj4Q": {"duration": 938, "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/persian/cyrus-cylinder/", "keywords": "", "id": "iokGgmrOj4Q", "title": "The Cyrus Cylinder and Ancient Persia", "description": "The Cyrus Cylinder is one of the most famous objects to have survived from the ancient world. It was inscribed in Babylonian cuneiform on the orders of Persian King Cyrus the Great (559-530 B.C.E.) after he captured Babylon in 539 B.C.E.\u00a0It was found in Babylon in modern Iraq in 1879 during a British Museum excavation.\nCyrus claims to have achieved this with the aid of Marduk, the god of Babylon. He then describes measures of relief he brought to the inhabitants of the city, and tells how he returned a number of images of gods, which Nabonidus had collected in Babylon, to their proper temples throughout Mesopotamia and western Iran. At the same time he arranged for the restoration of these temples, and organized the return to their homelands of a number of people who had been held in Babylonia by the Babylonian kings. Although the Jews are not mentioned in this document, their return to Palestine following their deportation by Nebuchadnezzar II, was part of this policy.\n\nThe cylinder is often referred to as the first bill of human rights as it appears to encourage freedom of worship throughout the Persian Empire and to allow deported people to return to their homelands, but it in fact reflects a long tradition in Mesopotamia where, from as early as the third millennium B.C.E., kings began their reigns with declarations of reforms.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iokGgmrOj4Q.mp4/iokGgmrOj4Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iokGgmrOj4Q.mp4/iokGgmrOj4Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iokGgmrOj4Q.m3u8/iokGgmrOj4Q.m3u8"}, "slug": "cyrus-cylinder", "video_id": "iokGgmrOj4Q", "youtube_id": "iokGgmrOj4Q", "readable_id": "cyrus-cylinder"}, "AK0NZITv5Ns": {"duration": 199, "path": "khan/math/early-math/cc-early-math-add-sub-20/cc-early-math-add-20/adding-within-20-example/", "keywords": "", "id": "AK0NZITv5Ns", "title": "Adding 8 + 7", "description": "Learn how to add 8 + 7 by making a group of ten.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AK0NZITv5Ns.mp4/AK0NZITv5Ns.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AK0NZITv5Ns.mp4/AK0NZITv5Ns.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AK0NZITv5Ns.m3u8/AK0NZITv5Ns.m3u8"}, "slug": "adding-within-20-example", "video_id": "AK0NZITv5Ns", "youtube_id": "AK0NZITv5Ns", "readable_id": "adding-within-20-example"}, "ay1QGPg2R98": {"duration": 238, "path": "khan/humanities/history/euro-hist/other-fronts-ww1/italy-backs-out-of-triple-alliance/", "keywords": "", "id": "ay1QGPg2R98", "title": "Italy backs out of Triple Alliance", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ay1QGPg2R98.mp4/ay1QGPg2R98.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ay1QGPg2R98.mp4/ay1QGPg2R98.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ay1QGPg2R98.m3u8/ay1QGPg2R98.m3u8"}, "slug": "italy-backs-out-of-triple-alliance", "video_id": "ay1QGPg2R98", "youtube_id": "ay1QGPg2R98", "readable_id": "italy-backs-out-of-triple-alliance"}, "tn53EdOr6Rw": {"duration": 182, "path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/negative-fractional-exponent-examples/", "keywords": "", "id": "tn53EdOr6Rw", "title": "How to evaluate numerical expressions with a negative unit-fraction exponent (example)", "description": "Sal shows how to evaluate 9^(-1/2) and 27^(-1/3).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tn53EdOr6Rw.mp4/tn53EdOr6Rw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tn53EdOr6Rw.mp4/tn53EdOr6Rw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tn53EdOr6Rw.m3u8/tn53EdOr6Rw.m3u8"}, "slug": "negative-fractional-exponent-examples", "video_id": "tn53EdOr6Rw", "youtube_id": "tn53EdOr6Rw", "readable_id": "negative-fractional-exponent-examples"}, "Mb9TudBudWk": {"duration": 278, "path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/hormones-body-mass-and-obesity/", "keywords": "", "id": "Mb9TudBudWk", "title": "Hormones, body mass, and obesity", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mb9TudBudWk.mp4/Mb9TudBudWk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mb9TudBudWk.mp4/Mb9TudBudWk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mb9TudBudWk.m3u8/Mb9TudBudWk.m3u8"}, "slug": "hormones-body-mass-and-obesity", "video_id": "Mb9TudBudWk", "youtube_id": "Mb9TudBudWk", "readable_id": "hormones-body-mass-and-obesity"}, "0NyeDUhKwBE": {"duration": 506, "path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/integrating-factors-2/", "keywords": "integrating, factor, exact, differential, equations", "id": "0NyeDUhKwBE", "title": "Integrating factors 2", "description": "Now that we've made the equation exact, let's solve it!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0NyeDUhKwBE.mp4/0NyeDUhKwBE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0NyeDUhKwBE.mp4/0NyeDUhKwBE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0NyeDUhKwBE.m3u8/0NyeDUhKwBE.m3u8"}, "slug": "integrating-factors-2", "video_id": "0NyeDUhKwBE", "youtube_id": "0NyeDUhKwBE", "readable_id": "integrating-factors-2"}, "9vlsBN3pFE0": {"duration": 494, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-divisible-determinants/", "keywords": "2010, IIT, JEE, Paper, Problem, 44, Divisible, Determinants", "id": "9vlsBN3pFE0", "title": "IIT JEE divisible determinants", "description": "2010 IIT JEE Paper 1 Problem 44 Divisible Determinants 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9vlsBN3pFE0.mp4/9vlsBN3pFE0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9vlsBN3pFE0.mp4/9vlsBN3pFE0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9vlsBN3pFE0.m3u8/9vlsBN3pFE0.m3u8"}, "slug": "iit-jee-divisible-determinants", "video_id": "9vlsBN3pFE0", "youtube_id": "9vlsBN3pFE0", "readable_id": "iit-jee-divisible-determinants"}, "stfSnPaaK04": {"duration": 211, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/deflation-tutorial/velocity-of-money-rather-than-quantity-driving-prices/", "keywords": "finance, economics", "id": "stfSnPaaK04", "title": "Velocity of money rather than quantity driving prices", "description": "How velocity of money can drive price increases", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/stfSnPaaK04.mp4/stfSnPaaK04.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/stfSnPaaK04.mp4/stfSnPaaK04.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/stfSnPaaK04.m3u8/stfSnPaaK04.m3u8"}, "slug": "velocity-of-money-rather-than-quantity-driving-prices", "video_id": "stfSnPaaK04", "youtube_id": "stfSnPaaK04", "readable_id": "velocity-of-money-rather-than-quantity-driving-prices"}, "PqRx4OV5jhM": {"duration": 236, "path": "khan/humanities/art-1010/early-abstraction/expressionism1/egon-schiele-hermits-1912/", "keywords": "Schiele, Hermits, GAP, Egon Schiele, 1912, Leopold Museum, Vienna, Expressionism, Modernism, Klimt, painting, Figurative, Google Art Project, Smarthistory, Khan Academy, OER, art history", "id": "PqRx4OV5jhM", "title": "Schiele, Hermits", "description": "Egon Schiele, Hermits, 1912, oil on canvas, 71-1/4 x 71-1/4 inches (Leopold Museum, Vienna)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PqRx4OV5jhM.mp4/PqRx4OV5jhM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PqRx4OV5jhM.mp4/PqRx4OV5jhM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PqRx4OV5jhM.m3u8/PqRx4OV5jhM.m3u8"}, "slug": "egon-schiele-hermits-1912", "video_id": "PqRx4OV5jhM", "youtube_id": "PqRx4OV5jhM", "readable_id": "egon-schiele-hermits-1912"}, "nL6LMX8-bPY": {"duration": 126, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/what-causes-precession-and-other-orbital-changes/", "keywords": "precession, obliquity, elliptic, orbit, Milankovitch, Cycles", "id": "nL6LMX8-bPY", "title": "What causes precession and other orbital changes", "description": "What causes precession and other orbital changes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nL6LMX8-bPY.mp4/nL6LMX8-bPY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nL6LMX8-bPY.mp4/nL6LMX8-bPY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nL6LMX8-bPY.m3u8/nL6LMX8-bPY.m3u8"}, "slug": "what-causes-precession-and-other-orbital-changes", "video_id": "nL6LMX8-bPY", "youtube_id": "nL6LMX8-bPY", "readable_id": "what-causes-precession-and-other-orbital-changes"}, "SRn3WhhS6vs": {"duration": 303, "path": "khan/math/algebra/systems-of-linear-equations/systems-of-linear-equations-word-problems/systems-word-problem-with-no-solution/", "keywords": "education,online learning,learning,lessons", "id": "SRn3WhhS6vs", "title": "How to solve a word problem about a system of equations with no solution (example)", "description": "Sal answers a word problem about a toy factory and finds that it has no solution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SRn3WhhS6vs.mp4/SRn3WhhS6vs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SRn3WhhS6vs.mp4/SRn3WhhS6vs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SRn3WhhS6vs.m3u8/SRn3WhhS6vs.m3u8"}, "slug": "systems-word-problem-with-no-solution", "video_id": "SRn3WhhS6vs", "youtube_id": "SRn3WhhS6vs", "readable_id": "systems-word-problem-with-no-solution"}, "lUD7ti47IQc": {"duration": 489, "path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof/divergence-theorem-proof-part-4/", "keywords": "", "id": "lUD7ti47IQc", "title": "Divergence theorem proof (part 4)", "description": "More evaluation of the surface integral", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lUD7ti47IQc.mp4/lUD7ti47IQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lUD7ti47IQc.mp4/lUD7ti47IQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lUD7ti47IQc.m3u8/lUD7ti47IQc.m3u8"}, "slug": "divergence-theorem-proof-part-4", "video_id": "lUD7ti47IQc", "youtube_id": "lUD7ti47IQc", "readable_id": "divergence-theorem-proof-part-4"}, "gplD1LV-lAA": {"duration": 510, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/price-return-relationship/", "keywords": "", "id": "gplD1LV-lAA", "title": "Inverse relationship between capital price and returns", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gplD1LV-lAA.mp4/gplD1LV-lAA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gplD1LV-lAA.mp4/gplD1LV-lAA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gplD1LV-lAA.m3u8/gplD1LV-lAA.m3u8"}, "slug": "price-return-relationship", "video_id": "gplD1LV-lAA", "youtube_id": "gplD1LV-lAA", "readable_id": "price-return-relationship"}, "JVcbDb3e-6w": {"duration": 508, "path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/making-an-offer-on-a-home/", "keywords": "", "id": "JVcbDb3e-6w", "title": "Making an offer on a home", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JVcbDb3e-6w.mp4/JVcbDb3e-6w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JVcbDb3e-6w.mp4/JVcbDb3e-6w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JVcbDb3e-6w.m3u8/JVcbDb3e-6w.m3u8"}, "slug": "making-an-offer-on-a-home", "video_id": "JVcbDb3e-6w", "youtube_id": "JVcbDb3e-6w", "readable_id": "making-an-offer-on-a-home"}, "J0tYHmuig-U": {"duration": 273, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-cystic-fibrosis/cystic-fibrosis-diagnosis/", "keywords": "", "id": "J0tYHmuig-U", "title": "Cystic fibrosis diagnosis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J0tYHmuig-U.mp4/J0tYHmuig-U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J0tYHmuig-U.mp4/J0tYHmuig-U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J0tYHmuig-U.m3u8/J0tYHmuig-U.m3u8"}, "slug": "cystic-fibrosis-diagnosis", "video_id": "J0tYHmuig-U", "youtube_id": "J0tYHmuig-U", "readable_id": "cystic-fibrosis-diagnosis"}, "aF6EHTtyYqw": {"duration": 266, "path": "khan/partner-content/wi-phi/critical-thinking/appeal-to-the-people/", "keywords": "", "id": "aF6EHTtyYqw", "title": "Fallacies: Appeal to the People", "description": "In this video, Jordan MacKenzie discusses a type of informal fallacy known as the argumentum ad populum fallacy, or the appeal to the people fallacy. This fallacy occurs when one attempts to establish the truth of a conclusion by appealing to the fact that the conclusion is widely believed to be true.\n\nSpeaker: Jordan MacKenzie, University of North Carolina at Chapel Hill", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aF6EHTtyYqw.mp4/aF6EHTtyYqw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aF6EHTtyYqw.mp4/aF6EHTtyYqw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aF6EHTtyYqw.m3u8/aF6EHTtyYqw.m3u8"}, "slug": "appeal-to-the-people", "video_id": "aF6EHTtyYqw", "youtube_id": "aF6EHTtyYqw", "readable_id": "appeal-to-the-people"}, "5xp9lI_fXDo": {"duration": 266, "path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/cooperativity/", "keywords": "", "id": "5xp9lI_fXDo", "title": "Cooperativity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5xp9lI_fXDo.mp4/5xp9lI_fXDo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5xp9lI_fXDo.mp4/5xp9lI_fXDo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5xp9lI_fXDo.m3u8/5xp9lI_fXDo.m3u8"}, "slug": "cooperativity", "video_id": "5xp9lI_fXDo", "youtube_id": "5xp9lI_fXDo", "readable_id": "cooperativity"}, "J7-GewgqWUQ": {"duration": 697, "path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/introduction-to-definition-of-ph/", "keywords": "education,online learning,learning,lessons", "id": "J7-GewgqWUQ", "title": "Definition of pH", "description": "Introduction to pH and the pH scale. Examples of calculating pH of pure water, bleach, and orange juice.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J7-GewgqWUQ.mp4/J7-GewgqWUQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J7-GewgqWUQ.mp4/J7-GewgqWUQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J7-GewgqWUQ.m3u8/J7-GewgqWUQ.m3u8"}, "slug": "introduction-to-definition-of-ph", "video_id": "J7-GewgqWUQ", "youtube_id": "J7-GewgqWUQ", "readable_id": "introduction-to-definition-of-ph"}, "gh_3hch2YNM": {"duration": 176, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-9-constitutional-convention/", "keywords": "", "id": "gh_3hch2YNM", "title": "9 Constitutional Convention", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gh_3hch2YNM.mp4/gh_3hch2YNM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gh_3hch2YNM.mp4/gh_3hch2YNM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gh_3hch2YNM.m3u8/gh_3hch2YNM.m3u8"}, "slug": "sat-9-constitutional-convention", "video_id": "gh_3hch2YNM", "youtube_id": "gh_3hch2YNM", "readable_id": "sat-9-constitutional-convention"}, "o6KlpIWhbcw": {"duration": 265, "path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-triangle-party/", "keywords": "doodling, mathematics, fractals, math, triangles, trigonometry, koch, vi hart, doodle, geometry, Triangle", "id": "o6KlpIWhbcw", "title": "Doodling in math: Triangle party", "description": "Triangles!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o6KlpIWhbcw.mp4/o6KlpIWhbcw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o6KlpIWhbcw.mp4/o6KlpIWhbcw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o6KlpIWhbcw.m3u8/o6KlpIWhbcw.m3u8"}, "slug": "doodling-in-math-class-triangle-party", "video_id": "o6KlpIWhbcw", "youtube_id": "o6KlpIWhbcw", "readable_id": "doodling-in-math-class-triangle-party"}, "MALIJQ3Q_zs": {"duration": 200, "path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-switchstatements/", "keywords": "", "id": "MALIJQ3Q_zs", "title": "Switch block (nested)", "description": "We can combine switch blocks for more advanced behavior", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MALIJQ3Q_zs.mp4/MALIJQ3Q_zs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MALIJQ3Q_zs.mp4/MALIJQ3Q_zs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MALIJQ3Q_zs.m3u8/MALIJQ3Q_zs.m3u8"}, "slug": "lego-switchstatements", "video_id": "MALIJQ3Q_zs", "youtube_id": "MALIJQ3Q_zs", "readable_id": "lego-switchstatements"}, "8p6R5yJjAGE": {"duration": 677, "path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/properties-of-alcohols/", "keywords": "", "id": "8p6R5yJjAGE", "title": "Properties of alcohols", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8p6R5yJjAGE.mp4/8p6R5yJjAGE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8p6R5yJjAGE.mp4/8p6R5yJjAGE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8p6R5yJjAGE.m3u8/8p6R5yJjAGE.m3u8"}, "slug": "properties-of-alcohols", "video_id": "8p6R5yJjAGE", "youtube_id": "8p6R5yJjAGE", "readable_id": "properties-of-alcohols"}, "bNNrlzel4Gw": {"duration": 157, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-sub-ones-tens/understanding-place-value-when-subtracting-tens/", "keywords": "", "id": "bNNrlzel4Gw", "title": "Understanding place value when subtracting tens", "description": "Learn how to subtract 40 from 65 by thinking about place value.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bNNrlzel4Gw.mp4/bNNrlzel4Gw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bNNrlzel4Gw.mp4/bNNrlzel4Gw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bNNrlzel4Gw.m3u8/bNNrlzel4Gw.m3u8"}, "slug": "understanding-place-value-when-subtracting-tens", "video_id": "bNNrlzel4Gw", "youtube_id": "bNNrlzel4Gw", "readable_id": "understanding-place-value-when-subtracting-tens"}, "wjCRcXQ3EHg": {"duration": 195, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/philip-rosedale/kauffman-philip-rosedale3/", "keywords": "", "id": "wjCRcXQ3EHg", "title": "Philip Rosedale - Evolving ideas vs. new ideas", "description": "Philip Rosedale, Founder of Coffee and Power, draws the distinction between companies that offer products distinguished by differentiation versus those that offer something fundamentally new. Philip goes on to discuss what drives him as an entrepreneur.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wjCRcXQ3EHg.mp4/wjCRcXQ3EHg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wjCRcXQ3EHg.mp4/wjCRcXQ3EHg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wjCRcXQ3EHg.m3u8/wjCRcXQ3EHg.m3u8"}, "slug": "kauffman-philip-rosedale3", "video_id": "wjCRcXQ3EHg", "youtube_id": "wjCRcXQ3EHg", "readable_id": "kauffman-philip-rosedale3"}, "ViLt2WI0XSg": {"duration": 377, "path": "khan/math/algebra/sequences/constructing-arithmetic-sequences/explicit-formulas-for-arithmetic-sequences/", "keywords": "education,online learning,learning,lessons", "id": "ViLt2WI0XSg", "title": "How to find the explicit formula of an arithmetic sequence (example)", "description": "Sal finds explicit formulas of arithmetic sequences given the first few terms of those sequences. He also explores equivalent forms of such formulas.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ViLt2WI0XSg.mp4/ViLt2WI0XSg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ViLt2WI0XSg.mp4/ViLt2WI0XSg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ViLt2WI0XSg.m3u8/ViLt2WI0XSg.m3u8"}, "slug": "explicit-formulas-for-arithmetic-sequences", "video_id": "ViLt2WI0XSg", "youtube_id": "ViLt2WI0XSg", "readable_id": "explicit-formulas-for-arithmetic-sequences"}, "fslMG-pmCeU": {"duration": 127, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2009-may-3-1/", "keywords": "", "id": "fslMG-pmCeU", "title": "18 Functions", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fslMG-pmCeU.mp4/fslMG-pmCeU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fslMG-pmCeU.mp4/fslMG-pmCeU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fslMG-pmCeU.m3u8/fslMG-pmCeU.m3u8"}, "slug": "sat-2009-may-3-1", "video_id": "fslMG-pmCeU", "youtube_id": "fslMG-pmCeU", "readable_id": "sat-2009-may-3-1"}, "icUBgcwp8QE": {"duration": 523, "path": "khan/test-prep/mcat/biomolecules/dna/transcription-2/", "keywords": "", "id": "icUBgcwp8QE", "title": "Transcription 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/icUBgcwp8QE.mp4/icUBgcwp8QE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/icUBgcwp8QE.mp4/icUBgcwp8QE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/icUBgcwp8QE.m3u8/icUBgcwp8QE.m3u8"}, "slug": "transcription-2", "video_id": "icUBgcwp8QE", "youtube_id": "icUBgcwp8QE", "readable_id": "transcription-2"}, "9bs1iQ14LJY": {"duration": 386, "path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/seurat-bathers-at-asni-res-1884/", "keywords": "smarthistory, seurat, Art History, Post-Impressionism, Pointillism, Neo-Impressionism, History Of Art", "id": "9bs1iQ14LJY", "title": "Seurat, Bathers at Asni\u00e8res", "description": "Georges Seurat, Bathers at Asni\u00e8res, 1884, oil on canvas, 6.6 x 9.8 ft (National Gallery, London) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9bs1iQ14LJY.mp4/9bs1iQ14LJY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9bs1iQ14LJY.mp4/9bs1iQ14LJY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9bs1iQ14LJY.m3u8/9bs1iQ14LJY.m3u8"}, "slug": "seurat-bathers-at-asni-res-1884", "video_id": "9bs1iQ14LJY", "youtube_id": "9bs1iQ14LJY", "readable_id": "seurat-bathers-at-asni-res-1884"}, "HXg_a9oJ5nA": {"duration": 271, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/number-patterns/interpreting-relationships-between-patterns/", "keywords": "", "id": "HXg_a9oJ5nA", "title": "Number patterns: interpreting relationships", "description": "Examining the points on a number line and interpreting the patterns to discover the relationships.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HXg_a9oJ5nA.mp4/HXg_a9oJ5nA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HXg_a9oJ5nA.mp4/HXg_a9oJ5nA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HXg_a9oJ5nA.m3u8/HXg_a9oJ5nA.m3u8"}, "slug": "interpreting-relationships-between-patterns", "video_id": "HXg_a9oJ5nA", "youtube_id": "HXg_a9oJ5nA", "readable_id": "interpreting-relationships-between-patterns"}, "jciijU8Mj_Y": {"duration": 593, "path": "khan/test-prep/gmat/problem-solving/gmat-math-1/", "keywords": "GMAT, math, problem, solving", "id": "jciijU8Mj_Y", "title": "GMAT: Math 1", "description": "1-6, pg. 152", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jciijU8Mj_Y.mp4/jciijU8Mj_Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jciijU8Mj_Y.mp4/jciijU8Mj_Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jciijU8Mj_Y.m3u8/jciijU8Mj_Y.m3u8"}, "slug": "gmat-math-1", "video_id": "jciijU8Mj_Y", "youtube_id": "jciijU8Mj_Y", "readable_id": "gmat-math-1"}, "RbLcxozAfeY": {"duration": 126, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2009-may-3-8/", "keywords": "", "id": "RbLcxozAfeY", "title": "8 Pounds of muscle", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RbLcxozAfeY.mp4/RbLcxozAfeY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RbLcxozAfeY.mp4/RbLcxozAfeY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RbLcxozAfeY.m3u8/RbLcxozAfeY.m3u8"}, "slug": "sat-2009-may-3-8", "video_id": "RbLcxozAfeY", "youtube_id": "RbLcxozAfeY", "readable_id": "sat-2009-may-3-8"}, "Lq-zp5_OgSY": {"duration": 200, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-21-correction/", "keywords": "gmat, math, data, sufficiency", "id": "Lq-zp5_OgSY", "title": "GMAT: Data sufficiency 21 (correction)", "description": "94, pg. 286", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Lq-zp5_OgSY.mp4/Lq-zp5_OgSY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Lq-zp5_OgSY.mp4/Lq-zp5_OgSY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Lq-zp5_OgSY.m3u8/Lq-zp5_OgSY.m3u8"}, "slug": "gmat-data-sufficiency-21-correction", "video_id": "Lq-zp5_OgSY", "youtube_id": "Lq-zp5_OgSY", "readable_id": "gmat-data-sufficiency-21-correction"}, "xljS9fFv3EU": {"duration": 142, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-29-toxic-chemicals/", "keywords": "", "id": "xljS9fFv3EU", "title": "29 Toxic chemicals", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xljS9fFv3EU.mp4/xljS9fFv3EU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xljS9fFv3EU.mp4/xljS9fFv3EU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xljS9fFv3EU.m3u8/xljS9fFv3EU.m3u8"}, "slug": "sat-29-toxic-chemicals", "video_id": "xljS9fFv3EU", "youtube_id": "xljS9fFv3EU", "readable_id": "sat-29-toxic-chemicals"}, "UbUdyE1_b9g": {"duration": 146, "path": "khan/math/pre-algebra/fractions-pre-alg/add-and-subtract-fracs-pre-alg/subtracting-fractions/", "keywords": "U02_L3_T2_we1, Subtracting, Fractions", "id": "UbUdyE1_b9g", "title": "Subtracting fractions with like denominators", "description": "Just like when we added...subtracting fractions is pretty straightforward when the two fractions have like denominators.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UbUdyE1_b9g.mp4/UbUdyE1_b9g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UbUdyE1_b9g.mp4/UbUdyE1_b9g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UbUdyE1_b9g.m3u8/UbUdyE1_b9g.m3u8"}, "slug": "subtracting-fractions", "video_id": "UbUdyE1_b9g", "youtube_id": "UbUdyE1_b9g", "readable_id": "subtracting-fractions"}, "2-oQA64myZQ": {"duration": 704, "path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-39/", "keywords": "crash course", "id": "2-oQA64myZQ", "title": "USA vs USSR Fight! The Cold War", "description": "In which John Green teaches you about the Cold War, which was occasionally hot, but on average, it was cool. In the sense of its temperature. It was by no means cool, man. After World War II, there were basically two big geopolitical powers left to divide up the world. And divide they did. The United States and the Soviet Union divvied up Europe in the aftermath of the war, and then proceeded to spend the next 45 years fighting over the rest of the world. It was the great ideological struggle, with the US on the side of capitalism and profit, and the USSR pushing Communism, so-called. While both sides presented themselves as the good guy in this situation, the reality is that there are no good guys. Both parties to the Cold War engaged in forcible regime changes, built up vast nuclear arsenals, and basically got up to dirty tricks. If you had to pick a bad guy though, I would point out that the USSR had no intention of bringing Laika the Cosmonaut Dog home alive. That poor dog never had a shot.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2-oQA64myZQ.mp4/2-oQA64myZQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2-oQA64myZQ.mp4/2-oQA64myZQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2-oQA64myZQ.m3u8/2-oQA64myZQ.m3u8"}, "slug": "crash-course-world-history-39", "video_id": "2-oQA64myZQ", "youtube_id": "2-oQA64myZQ", "readable_id": "crash-course-world-history-39"}, "H9BWRYJNIv4": {"duration": 1120, "path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-nxn-determinant/", "keywords": "determinant, example", "id": "H9BWRYJNIv4", "title": "n x n determinant", "description": "Defining the determinant for nxn matrices. An exampled of a 4x4 determinant.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H9BWRYJNIv4.mp4/H9BWRYJNIv4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H9BWRYJNIv4.mp4/H9BWRYJNIv4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H9BWRYJNIv4.m3u8/H9BWRYJNIv4.m3u8"}, "slug": "linear-algebra-nxn-determinant", "video_id": "H9BWRYJNIv4", "youtube_id": "H9BWRYJNIv4", "readable_id": "linear-algebra-nxn-determinant"}, "Oges5YqDLHY": {"duration": 640, "path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/angiotensin-2-raises-blood-pressure/", "keywords": "", "id": "Oges5YqDLHY", "title": "Angiotensin 2 raises blood pressure", "description": "See how Angiotensin 2 effects 4 target \"organs\" to increase blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Oges5YqDLHY.mp4/Oges5YqDLHY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Oges5YqDLHY.mp4/Oges5YqDLHY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Oges5YqDLHY.m3u8/Oges5YqDLHY.m3u8"}, "slug": "angiotensin-2-raises-blood-pressure", "video_id": "Oges5YqDLHY", "youtube_id": "Oges5YqDLHY", "readable_id": "angiotensin-2-raises-blood-pressure"}, "0gzSreH8nUI": {"duration": 365, "path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/finding-more-angles/", "keywords": "Finding, more, angles", "id": "0gzSreH8nUI", "title": "Finding more angles", "description": "Example of angle hunting!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0gzSreH8nUI.mp4/0gzSreH8nUI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0gzSreH8nUI.mp4/0gzSreH8nUI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0gzSreH8nUI.m3u8/0gzSreH8nUI.m3u8"}, "slug": "finding-more-angles", "video_id": "0gzSreH8nUI", "youtube_id": "0gzSreH8nUI", "readable_id": "finding-more-angles"}, "8I_KtODUekU": {"duration": 417, "path": "khan/math/integral-calculus/sequences_series_approx_calc/estimating-infinite-series/estimating-infinite-sum-integrals/", "keywords": "", "id": "8I_KtODUekU", "title": "Estimating infinite series using integrals", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8I_KtODUekU.mp4/8I_KtODUekU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8I_KtODUekU.mp4/8I_KtODUekU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8I_KtODUekU.m3u8/8I_KtODUekU.m3u8"}, "slug": "estimating-infinite-sum-integrals", "video_id": "8I_KtODUekU", "youtube_id": "8I_KtODUekU", "readable_id": "estimating-infinite-sum-integrals"}, "YKzHdQKX9RA": {"duration": 235, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-david-1623-24/", "keywords": "bernini, david, Khan Academy, Smarthistory, Art History, Baroque, Rome", "id": "YKzHdQKX9RA", "title": "Bernini, David", "description": "Gian Lorenzo Bernini, David, 1623-24, marble (Galleria Borghese, Rome)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YKzHdQKX9RA.mp4/YKzHdQKX9RA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YKzHdQKX9RA.mp4/YKzHdQKX9RA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YKzHdQKX9RA.m3u8/YKzHdQKX9RA.m3u8"}, "slug": "bernini-david-1623-24", "video_id": "YKzHdQKX9RA", "youtube_id": "YKzHdQKX9RA", "readable_id": "bernini-david-1623-24"}, "xHWKYFhhtJQ": {"duration": 260, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/binary-multiplication/", "keywords": "", "id": "xHWKYFhhtJQ", "title": "Multiplying in binary", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xHWKYFhhtJQ.mp4/xHWKYFhhtJQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xHWKYFhhtJQ.mp4/xHWKYFhhtJQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xHWKYFhhtJQ.m3u8/xHWKYFhhtJQ.m3u8"}, "slug": "binary-multiplication", "video_id": "xHWKYFhhtJQ", "youtube_id": "xHWKYFhhtJQ", "readable_id": "binary-multiplication"}, "aAfBSJObd6Y": {"duration": 1253, "path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/carnot-cycle-and-carnot-engine/", "keywords": "thermodynamics, carnot, entropy", "id": "aAfBSJObd6Y", "title": "Carnot cycle and Carnot engine", "description": "Introduction to the Carnot cycle and Carnot heat engine", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aAfBSJObd6Y.mp4/aAfBSJObd6Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aAfBSJObd6Y.mp4/aAfBSJObd6Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aAfBSJObd6Y.m3u8/aAfBSJObd6Y.m3u8"}, "slug": "carnot-cycle-and-carnot-engine", "video_id": "aAfBSJObd6Y", "youtube_id": "aAfBSJObd6Y", "readable_id": "carnot-cycle-and-carnot-engine"}, "QmfoIvgIVlE": {"duration": 161, "path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/constructing-angles/", "keywords": "", "id": "QmfoIvgIVlE", "title": "Constructing angles", "description": "As opposed to measuring an angle using a protractor, in this example we're constructing an angle. Same idea here, just a slightly different application. You got this.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QmfoIvgIVlE.mp4/QmfoIvgIVlE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QmfoIvgIVlE.mp4/QmfoIvgIVlE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QmfoIvgIVlE.m3u8/QmfoIvgIVlE.m3u8"}, "slug": "constructing-angles", "video_id": "QmfoIvgIVlE", "youtube_id": "QmfoIvgIVlE", "readable_id": "constructing-angles"}, "E1j8W64NQ0Y": {"duration": 360, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/modeling-with-rational-functions/applying-rational-equations-2/", "keywords": "U11_L2_T2_we2, Applying, Rational, Equations, CC_39336_A-APR_7, CC_39336_A-CED_1", "id": "E1j8W64NQ0Y", "title": "How to solve combined rates word problem with rational equations (example)", "description": "Sal solves a word problem about the combined deck-staining rates of Anya and Bill, by creating a rational equation that models the situation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E1j8W64NQ0Y.mp4/E1j8W64NQ0Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E1j8W64NQ0Y.mp4/E1j8W64NQ0Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E1j8W64NQ0Y.m3u8/E1j8W64NQ0Y.m3u8"}, "slug": "applying-rational-equations-2", "video_id": "E1j8W64NQ0Y", "youtube_id": "E1j8W64NQ0Y", "readable_id": "applying-rational-equations-2"}, "DuYgVVU_BwY": {"duration": 550, "path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/graphing-logarithmic-functions/", "keywords": "u18_l2_t1_we3, Graphing, Logarithmic, Functions", "id": "DuYgVVU_BwY", "title": "Graphing logarithmic functions", "description": "Graphing Logarithmic Functions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DuYgVVU_BwY.mp4/DuYgVVU_BwY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DuYgVVU_BwY.mp4/DuYgVVU_BwY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DuYgVVU_BwY.m3u8/DuYgVVU_BwY.m3u8"}, "slug": "graphing-logarithmic-functions", "video_id": "DuYgVVU_BwY", "youtube_id": "DuYgVVU_BwY", "readable_id": "graphing-logarithmic-functions"}, "c6-FJRda_Vc": {"duration": 104, "path": "khan/math/algebra-basics/core-algebra-linear-equations-inequalities/core-algebra-direct_inverse_variation/proportionality-constant-for-direct-variation/", "keywords": "u15_l3_t1_we3, Proportionality, Constant, for, Direct, Variation, CC_6_EE_2_c, CC_6_EE_9", "id": "c6-FJRda_Vc", "title": "Proportionality constant for direct variation", "description": "Proportionality Constant for Direct Variation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/c6-FJRda_Vc.mp4/c6-FJRda_Vc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/c6-FJRda_Vc.mp4/c6-FJRda_Vc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/c6-FJRda_Vc.m3u8/c6-FJRda_Vc.m3u8"}, "slug": "proportionality-constant-for-direct-variation", "video_id": "c6-FJRda_Vc", "youtube_id": "c6-FJRda_Vc", "readable_id": "proportionality-constant-for-direct-variation"}, "owKAHXf1y1A": {"duration": 1142, "path": "khan/math/multivariable-calculus/surface-integrals/surface_parametrization/introduction-to-parametrizing-a-surface-with-two-parameters/", "keywords": "Introduction, to, Parametrizing, Surface, with, Two, Parameters", "id": "owKAHXf1y1A", "title": "Introduction to parametrizing a surface with two parameters", "description": "Introduction to Parametrizing a Surface with Two Parameters", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/owKAHXf1y1A.mp4/owKAHXf1y1A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/owKAHXf1y1A.mp4/owKAHXf1y1A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/owKAHXf1y1A.m3u8/owKAHXf1y1A.m3u8"}, "slug": "introduction-to-parametrizing-a-surface-with-two-parameters", "video_id": "owKAHXf1y1A", "youtube_id": "owKAHXf1y1A", "readable_id": "introduction-to-parametrizing-a-surface-with-two-parameters"}, "QI6x0KNxiCs": {"duration": 481, "path": "khan/math/arithmetic/multiplication-division/mult-div-concept/the-idea-of-division/", "keywords": "", "id": "QI6x0KNxiCs", "title": "The idea of division", "description": "Use an array and understanding of multiplication to divide.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QI6x0KNxiCs.mp4/QI6x0KNxiCs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QI6x0KNxiCs.mp4/QI6x0KNxiCs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QI6x0KNxiCs.m3u8/QI6x0KNxiCs.m3u8"}, "slug": "the-idea-of-division", "video_id": "QI6x0KNxiCs", "youtube_id": "QI6x0KNxiCs", "readable_id": "the-idea-of-division"}, "2s3aJfRr9gE": {"duration": 425, "path": "khan/computing/computer-science/informationtheory/moderninfotheory/information-entropy/", "keywords": "", "id": "2s3aJfRr9gE", "title": "Information entropy", "description": "Finally we arrive at our quantitative measure of entropy", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2s3aJfRr9gE.mp4/2s3aJfRr9gE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2s3aJfRr9gE.mp4/2s3aJfRr9gE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2s3aJfRr9gE.m3u8/2s3aJfRr9gE.m3u8"}, "slug": "information-entropy", "video_id": "2s3aJfRr9gE", "youtube_id": "2s3aJfRr9gE", "readable_id": "information-entropy"}, "zTK6XUF0HAs": {"duration": 344, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-sub-miss-value-prob/missing-numbers-in-addition-and-subtraction-within-100/", "keywords": "education,online learning,learning,lessons", "id": "zTK6XUF0HAs", "title": "Missing numbers in addition and subtraction within 100", "description": "Learn how to solve missing number problems like 73 = ___ + 57.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zTK6XUF0HAs.mp4/zTK6XUF0HAs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zTK6XUF0HAs.mp4/zTK6XUF0HAs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zTK6XUF0HAs.m3u8/zTK6XUF0HAs.m3u8"}, "slug": "missing-numbers-in-addition-and-subtraction-within-100", "video_id": "zTK6XUF0HAs", "youtube_id": "zTK6XUF0HAs", "readable_id": "missing-numbers-in-addition-and-subtraction-within-100"}, "y-O_B-wWivQ": {"duration": 89, "path": "khan/math/basic-geo/basic-geo-lines/basic-geo-measuring-segments/measuring-segments/", "keywords": "", "id": "y-O_B-wWivQ", "title": "Measuring Line Segments", "description": "In this example of measuring a line segment, the numbers span across the positive and negative. Remember, line segments and points are the foundations of geometry, so this is an important concept.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y-O_B-wWivQ.mp4/y-O_B-wWivQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y-O_B-wWivQ.mp4/y-O_B-wWivQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y-O_B-wWivQ.m3u8/y-O_B-wWivQ.m3u8"}, "slug": "measuring-segments", "video_id": "y-O_B-wWivQ", "youtube_id": "y-O_B-wWivQ", "readable_id": "measuring-segments"}, "vnNlvnnBX0I": {"duration": 616, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/exponential-decay-and-semi-log-plots/", "keywords": "", "id": "vnNlvnnBX0I", "title": "Exponential decay and semi-log plots", "description": "Using exponential decay equation to solve for relationship between k and half-life. Using semi-log plot to get graph of a straight line with slope of -k.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vnNlvnnBX0I.mp4/vnNlvnnBX0I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vnNlvnnBX0I.mp4/vnNlvnnBX0I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vnNlvnnBX0I.m3u8/vnNlvnnBX0I.m3u8"}, "slug": "exponential-decay-and-semi-log-plots", "video_id": "vnNlvnnBX0I", "youtube_id": "vnNlvnnBX0I", "readable_id": "exponential-decay-and-semi-log-plots"}, "jOw5_m54Bxg": {"duration": 226, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/zach-kaplan/kauffman-zach-kaplan2/", "keywords": "Zach Kaplan, Kauffman, Inventables", "id": "jOw5_m54Bxg", "title": "Zach Kaplan - CEO of Inventables", "description": "Zach Kaplan, CEO of Inventables, talks about how his early education helped shape his entrepreneurial roots and describes how a popular movie taught him an important lesson in entrepreneurship. He then recalls the moment when he had to decide between starting a company and taking a job.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jOw5_m54Bxg.mp4/jOw5_m54Bxg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jOw5_m54Bxg.mp4/jOw5_m54Bxg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jOw5_m54Bxg.m3u8/jOw5_m54Bxg.m3u8"}, "slug": "kauffman-zach-kaplan2", "video_id": "jOw5_m54Bxg", "youtube_id": "jOw5_m54Bxg", "readable_id": "kauffman-zach-kaplan2"}, "fGwSr7AolMI": {"duration": 154, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-8-13/", "keywords": "", "id": "fGwSr7AolMI", "title": "13 Strange function definition", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fGwSr7AolMI.mp4/fGwSr7AolMI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fGwSr7AolMI.mp4/fGwSr7AolMI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fGwSr7AolMI.m3u8/fGwSr7AolMI.m3u8"}, "slug": "sat-2008-may-8-13", "video_id": "fGwSr7AolMI", "youtube_id": "fGwSr7AolMI", "readable_id": "sat-2008-may-8-13"}, "av947KCWf2U": {"duration": 539, "path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/ratio-test-convergence/", "keywords": "", "id": "av947KCWf2U", "title": "Ratio test", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/av947KCWf2U.mp4/av947KCWf2U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/av947KCWf2U.mp4/av947KCWf2U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/av947KCWf2U.m3u8/av947KCWf2U.m3u8"}, "slug": "ratio-test-convergence", "video_id": "av947KCWf2U", "youtube_id": "av947KCWf2U", "readable_id": "ratio-test-convergence"}, "ppIzSaP2jWI": {"duration": 163, "path": "khan/partner-content/big-history-project/early-humans/how-ancestors-evolved/bhp-threshold6/", "keywords": "", "id": "ppIzSaP2jWI", "title": "Threshold 6: Humans and Collective Learning", "description": "About 200,000 years ago, man evolved to become the most important force for change on the Earth's surface. What makes us so different from other living things? How did we, together, make something entirely new?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ppIzSaP2jWI.mp4/ppIzSaP2jWI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ppIzSaP2jWI.mp4/ppIzSaP2jWI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ppIzSaP2jWI.m3u8/ppIzSaP2jWI.m3u8"}, "slug": "bhp-threshold6", "video_id": "ppIzSaP2jWI", "youtube_id": "ppIzSaP2jWI", "readable_id": "bhp-threshold6"}, "Z0B1IyDeNLI": {"duration": 91, "path": "khan/math/early-math/cc-early-math-geometry-topic/cc-early-math-fractions-of-shapes/filling-rectangles-with-squares/", "keywords": "", "id": "Z0B1IyDeNLI", "title": "Filling rectangles with squares", "description": "Learn how to fill rectangles with squares.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z0B1IyDeNLI.mp4/Z0B1IyDeNLI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z0B1IyDeNLI.mp4/Z0B1IyDeNLI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z0B1IyDeNLI.m3u8/Z0B1IyDeNLI.m3u8"}, "slug": "filling-rectangles-with-squares", "video_id": "Z0B1IyDeNLI", "youtube_id": "Z0B1IyDeNLI", "readable_id": "filling-rectangles-with-squares"}, "glEP04Pzap8": {"duration": 354, "path": "khan/math/algebra/linear_inequalities/structure-expressions-linear/dogs-cats-and-bears-in-a-pet-store-visual-argument/", "keywords": "", "id": "glEP04Pzap8", "title": "Dogs cats and bears in a pet store visual argument", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/glEP04Pzap8.mp4/glEP04Pzap8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/glEP04Pzap8.mp4/glEP04Pzap8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/glEP04Pzap8.m3u8/glEP04Pzap8.m3u8"}, "slug": "dogs-cats-and-bears-in-a-pet-store-visual-argument", "video_id": "glEP04Pzap8", "youtube_id": "glEP04Pzap8", "readable_id": "dogs-cats-and-bears-in-a-pet-store-visual-argument"}, "-oFlAhtear4": {"duration": 67, "path": "khan/math/pre-algebra/decimals-pre-alg/decimal-place-value-pre-alg/understanding-decimal-place-value-exercise/", "keywords": "", "id": "-oFlAhtear4", "title": "Decimals: choosing a number to represent place value", "description": "Let's decide the number of each place value to make the given decimal. We can do it together!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-oFlAhtear4.mp4/-oFlAhtear4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-oFlAhtear4.mp4/-oFlAhtear4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-oFlAhtear4.m3u8/-oFlAhtear4.m3u8"}, "slug": "understanding-decimal-place-value-exercise", "video_id": "-oFlAhtear4", "youtube_id": "-oFlAhtear4", "readable_id": "understanding-decimal-place-value-exercise"}, "yfR36PMWegg": {"duration": 1131, "path": "khan/science/biology/cellular-molecular-biology/photosynthesis/photosynthesis-light-reactions-and-photophosphorylation/", "keywords": "chlorophyll, photosynthesis, light, reactions, photophophorylation", "id": "yfR36PMWegg", "title": "Photosynthesis: Light reactions and photophosphorylation", "description": "More detail on the light reactions and photophosphorylation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yfR36PMWegg.mp4/yfR36PMWegg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yfR36PMWegg.mp4/yfR36PMWegg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yfR36PMWegg.m3u8/yfR36PMWegg.m3u8"}, "slug": "photosynthesis-light-reactions-and-photophosphorylation", "video_id": "yfR36PMWegg", "youtube_id": "yfR36PMWegg", "readable_id": "photosynthesis-light-reactions-and-photophosphorylation"}, "aj34f2Bg9Vw": {"duration": 470, "path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-calculation-example/", "keywords": "", "id": "aj34f2Bg9Vw", "title": "Titration calculation example", "description": "Example of titrating strong acid, hydrochloric acid, with strong base barium hydroxide. How to calculate the unknown concentration when you don't have a 1:1 molar ratio of H+ to OH-.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aj34f2Bg9Vw.mp4/aj34f2Bg9Vw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aj34f2Bg9Vw.mp4/aj34f2Bg9Vw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aj34f2Bg9Vw.m3u8/aj34f2Bg9Vw.m3u8"}, "slug": "titration-calculation-example", "video_id": "aj34f2Bg9Vw", "youtube_id": "aj34f2Bg9Vw", "readable_id": "titration-calculation-example"}, "DKh16Th8x6o": {"duration": 258, "path": "khan/math/pre-algebra/exponents-radicals/cube-root-tutorial/finding-cube-roots/", "keywords": "u16_l1_t2_we2, Finding, Cube, Roots", "id": "DKh16Th8x6o", "title": "Cube root of a negative number (example)", "description": "Learn how to find the cube root of -512.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DKh16Th8x6o.mp4/DKh16Th8x6o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DKh16Th8x6o.mp4/DKh16Th8x6o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DKh16Th8x6o.m3u8/DKh16Th8x6o.m3u8"}, "slug": "finding-cube-roots", "video_id": "DKh16Th8x6o", "youtube_id": "DKh16Th8x6o", "readable_id": "finding-cube-roots"}, "fwSGKbmuHFI": {"duration": 656, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-jay/sn1-sn2-e1-e2-reactions-secondary-alkyl-halides/", "keywords": "", "id": "fwSGKbmuHFI", "title": "Sn1 Sn2 E1 E2 reactions: Secondary alkyl halides", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fwSGKbmuHFI.mp4/fwSGKbmuHFI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fwSGKbmuHFI.mp4/fwSGKbmuHFI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fwSGKbmuHFI.m3u8/fwSGKbmuHFI.m3u8"}, "slug": "sn1-sn2-e1-e2-reactions-secondary-alkyl-halides", "video_id": "fwSGKbmuHFI", "youtube_id": "fwSGKbmuHFI", "readable_id": "sn1-sn2-e1-e2-reactions-secondary-alkyl-halides"}, "Nq88IHw4Y9E": {"duration": 238, "path": "khan/math/early-math/cc-early-math-add-sub-1000/cc-early-math-strategies-for-adding-two-and-three-digit-numbers/addition-using-groups-of-10-and-100/", "keywords": "education,online learning,learning,lessons", "id": "Nq88IHw4Y9E", "title": "Addition using groups of 10 and 100", "description": "Learn how to rewrite addition problems to make them easier to solve.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Nq88IHw4Y9E.mp4/Nq88IHw4Y9E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Nq88IHw4Y9E.mp4/Nq88IHw4Y9E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Nq88IHw4Y9E.m3u8/Nq88IHw4Y9E.m3u8"}, "slug": "addition-using-groups-of-10-and-100", "video_id": "Nq88IHw4Y9E", "youtube_id": "Nq88IHw4Y9E", "readable_id": "addition-using-groups-of-10-and-100"}, "S7CLLRHe8ik": {"duration": 322, "path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns/figuring-out-days-of-the-week/", "keywords": "", "id": "S7CLLRHe8ik", "title": "Using factors and multiples to figure out days of the week", "description": "Can you help us think of a mathematical way to determine what day of the week a certain number day falls on? You may say no....but wait! Watch this.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S7CLLRHe8ik.mp4/S7CLLRHe8ik.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S7CLLRHe8ik.mp4/S7CLLRHe8ik.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S7CLLRHe8ik.m3u8/S7CLLRHe8ik.m3u8"}, "slug": "figuring-out-days-of-the-week", "video_id": "S7CLLRHe8ik", "youtube_id": "S7CLLRHe8ik", "readable_id": "figuring-out-days-of-the-week"}, "mIStB5X4U8M": {"duration": 493, "path": "khan/math/pre-algebra/factors-multiples/prime_numbers/prime-numbers/", "keywords": "prime, numbers, CC_4_OA_4", "id": "mIStB5X4U8M", "title": "Prime numbers", "description": "What does it mean to be a prime number? Let's progress though some whole numbers and ask ourselves if they meet the criteria. What is the criteria you ask? Watch.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mIStB5X4U8M.mp4/mIStB5X4U8M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mIStB5X4U8M.mp4/mIStB5X4U8M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mIStB5X4U8M.m3u8/mIStB5X4U8M.m3u8"}, "slug": "prime-numbers", "video_id": "mIStB5X4U8M", "youtube_id": "mIStB5X4U8M", "readable_id": "prime-numbers"}, "mZ-U7Qpkz8Y": {"duration": 565, "path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/introduction-to-infrared-spectroscopy/", "keywords": "", "id": "mZ-U7Qpkz8Y", "title": "Introduction to infrared spectroscopy", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mZ-U7Qpkz8Y.mp4/mZ-U7Qpkz8Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mZ-U7Qpkz8Y.mp4/mZ-U7Qpkz8Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mZ-U7Qpkz8Y.m3u8/mZ-U7Qpkz8Y.m3u8"}, "slug": "introduction-to-infrared-spectroscopy", "video_id": "mZ-U7Qpkz8Y", "youtube_id": "mZ-U7Qpkz8Y", "readable_id": "introduction-to-infrared-spectroscopy"}, "SPVqgkOZMAc": {"duration": 508, "path": "khan/math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order/2nd-order-linear-homogeneous-differential-equations-2/", "keywords": "2nd, Order, Linear, Homogeneous, Differential, Equations", "id": "SPVqgkOZMAc", "title": "2nd order linear homogeneous differential equations 2", "description": "Let's find the general solution!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SPVqgkOZMAc.mp4/SPVqgkOZMAc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SPVqgkOZMAc.mp4/SPVqgkOZMAc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SPVqgkOZMAc.m3u8/SPVqgkOZMAc.m3u8"}, "slug": "2nd-order-linear-homogeneous-differential-equations-2", "video_id": "SPVqgkOZMAc", "youtube_id": "SPVqgkOZMAc", "readable_id": "2nd-order-linear-homogeneous-differential-equations-2"}, "n4EK92CSuBE": {"duration": 458, "path": "khan/math/integral-calculus/integration-techniques/trig_substitution/integrals-trig-substitution-1/", "keywords": "calculus, trig, substitution", "id": "n4EK92CSuBE", "title": "Integrals: Trig substitution 1", "description": "Example of using trig substitution to solve an indefinite integral", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n4EK92CSuBE.mp4/n4EK92CSuBE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n4EK92CSuBE.mp4/n4EK92CSuBE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n4EK92CSuBE.m3u8/n4EK92CSuBE.m3u8"}, "slug": "integrals-trig-substitution-1", "video_id": "n4EK92CSuBE", "youtube_id": "n4EK92CSuBE", "readable_id": "integrals-trig-substitution-1"}, "Y2B6j7poiKI": {"duration": 395, "path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/4-lifestyle-changes-to-help-manage-hypertension/", "keywords": "", "id": "Y2B6j7poiKI", "title": "4 lifestyle changes to help manage hypertension", "description": "Remember that a good diet, exercise, losing weight, and quitting smoking can lower blood pressure! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y2B6j7poiKI.mp4/Y2B6j7poiKI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y2B6j7poiKI.mp4/Y2B6j7poiKI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y2B6j7poiKI.m3u8/Y2B6j7poiKI.m3u8"}, "slug": "4-lifestyle-changes-to-help-manage-hypertension", "video_id": "Y2B6j7poiKI", "youtube_id": "Y2B6j7poiKI", "readable_id": "4-lifestyle-changes-to-help-manage-hypertension"}, "8YR1E7XWPz8": {"duration": 152, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-sub-ones-tens/comparing-subtracting-1-and-10/", "keywords": "education,online learning,learning,lessons", "id": "8YR1E7XWPz8", "title": "Subtracting 1 vs. subtracting 10", "description": "Let's think about the difference between subtracting 1 and subtracting 10.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8YR1E7XWPz8.mp4/8YR1E7XWPz8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8YR1E7XWPz8.mp4/8YR1E7XWPz8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8YR1E7XWPz8.m3u8/8YR1E7XWPz8.m3u8"}, "slug": "comparing-subtracting-1-and-10", "video_id": "8YR1E7XWPz8", "youtube_id": "8YR1E7XWPz8", "readable_id": "comparing-subtracting-1-and-10"}, "ahyWUV7AwKw": {"duration": 201, "path": "khan/math/probability/statistical-studies/categorical-data/video-games-and-violence-bivariate-data/", "keywords": "", "id": "ahyWUV7AwKw", "title": "Video games and violence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ahyWUV7AwKw.mp4/ahyWUV7AwKw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ahyWUV7AwKw.mp4/ahyWUV7AwKw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ahyWUV7AwKw.m3u8/ahyWUV7AwKw.m3u8"}, "slug": "video-games-and-violence-bivariate-data", "video_id": "ahyWUV7AwKw", "youtube_id": "ahyWUV7AwKw", "readable_id": "video-games-and-violence-bivariate-data"}, "rEtuPhl6930": {"duration": 463, "path": "khan/math/pre-algebra/exponents-radicals/exponent-properties/exponent-rules-part-2/", "keywords": "Math, exponents, algebra, exponent, rules, khan, academy, CC_8_EE_1", "id": "rEtuPhl6930", "title": "Exponent rules part 2", "description": "2 more exponent rules with an introduction to composite problems", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rEtuPhl6930.mp4/rEtuPhl6930.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rEtuPhl6930.mp4/rEtuPhl6930.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rEtuPhl6930.m3u8/rEtuPhl6930.m3u8"}, "slug": "exponent-rules-part-2", "video_id": "rEtuPhl6930", "youtube_id": "rEtuPhl6930", "readable_id": "exponent-rules-part-2"}, "hg2HR9zJFq4": {"duration": 264, "path": "khan/math/algebra/algebra-functions/piecewise-functions/evaluating-piecewise-functions-example/", "keywords": "", "id": "hg2HR9zJFq4", "title": "How to evaluate a piecewise function (example)", "description": "Sal evaluates a piecewise function at a given input.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hg2HR9zJFq4.mp4/hg2HR9zJFq4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hg2HR9zJFq4.mp4/hg2HR9zJFq4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hg2HR9zJFq4.m3u8/hg2HR9zJFq4.m3u8"}, "slug": "evaluating-piecewise-functions-example", "video_id": "hg2HR9zJFq4", "youtube_id": "hg2HR9zJFq4", "readable_id": "evaluating-piecewise-functions-example"}, "VnTlKcIigyY": {"duration": 598, "path": "khan/economics-finance-domain/core-finance/taxes-topic/corporate-taxation/corporations-and-limited-liability/", "keywords": "limited, liability, corporations", "id": "VnTlKcIigyY", "title": "Corporations and limited liability", "description": "Why people set up corporations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VnTlKcIigyY.mp4/VnTlKcIigyY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VnTlKcIigyY.mp4/VnTlKcIigyY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VnTlKcIigyY.m3u8/VnTlKcIigyY.m3u8"}, "slug": "corporations-and-limited-liability", "video_id": "VnTlKcIigyY", "youtube_id": "VnTlKcIigyY", "readable_id": "corporations-and-limited-liability"}, "wRxzDOloS3o": {"duration": 735, "path": "khan/math/recreational-math/puzzles/brain-teasers/3-d-path-counting-brain-teaser/", "keywords": "brain, teaser, trinomial, path, counting, dimension", "id": "wRxzDOloS3o", "title": "3D path counting brain teaser", "description": "Extending the path counting to three dimensions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wRxzDOloS3o.mp4/wRxzDOloS3o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wRxzDOloS3o.mp4/wRxzDOloS3o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wRxzDOloS3o.m3u8/wRxzDOloS3o.m3u8"}, "slug": "3-d-path-counting-brain-teaser", "video_id": "wRxzDOloS3o", "youtube_id": "wRxzDOloS3o", "readable_id": "3-d-path-counting-brain-teaser"}, "bPi1aurgNZg": {"duration": 65, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/noun-agreement-basic/", "keywords": "education,online learning,learning,lessons", "id": "bPi1aurgNZg", "title": "Writing: Noun agreement \u2014 Basic example", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0noun agreement.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bPi1aurgNZg.mp4/bPi1aurgNZg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bPi1aurgNZg.mp4/bPi1aurgNZg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bPi1aurgNZg.m3u8/bPi1aurgNZg.m3u8"}, "slug": "noun-agreement-basic", "video_id": "bPi1aurgNZg", "youtube_id": "bPi1aurgNZg", "readable_id": "noun-agreement-basic"}, "E5PndKebh70": {"duration": 782, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/pressure-in-the-left-heart-part-3/", "keywords": "", "id": "E5PndKebh70", "title": "Pressure in the left heart - part 3", "description": "Watch the pressure in the left heart go up and down with every heart beat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E5PndKebh70.mp4/E5PndKebh70.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E5PndKebh70.mp4/E5PndKebh70.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E5PndKebh70.m3u8/E5PndKebh70.m3u8"}, "slug": "pressure-in-the-left-heart-part-3", "video_id": "E5PndKebh70", "youtube_id": "E5PndKebh70", "readable_id": "pressure-in-the-left-heart-part-3"}, "jWQ4V43TJ6o": {"duration": 308, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/rubens-marie/", "keywords": "", "id": "jWQ4V43TJ6o", "title": "Rubens, The Presentation of the Portrait of Marie de' Medici", "description": "Peter Paul Rubens, The Presentation of the Portrait of Marie de' Medici, c. 1622-1625, oil on canvas, 394 x 295 cm (Mus\u00e9e du Louvre)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jWQ4V43TJ6o.mp4/jWQ4V43TJ6o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jWQ4V43TJ6o.mp4/jWQ4V43TJ6o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jWQ4V43TJ6o.m3u8/jWQ4V43TJ6o.m3u8"}, "slug": "rubens-marie", "video_id": "jWQ4V43TJ6o", "youtube_id": "jWQ4V43TJ6o", "readable_id": "rubens-marie"}, "n17q8CBiMtQ": {"duration": 434, "path": "khan/math/algebra/algebra-functions/determining-the-domain-of-a-function/domain-of-algebraic-function-examples/", "keywords": "", "id": "n17q8CBiMtQ", "title": "How to determine the domain of algebraic functions (examples)", "description": "Sal gives many examples where he determines the domains of functions according to mathematical limitations.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n17q8CBiMtQ.mp4/n17q8CBiMtQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n17q8CBiMtQ.mp4/n17q8CBiMtQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n17q8CBiMtQ.m3u8/n17q8CBiMtQ.m3u8"}, "slug": "domain-of-algebraic-function-examples", "video_id": "n17q8CBiMtQ", "youtube_id": "n17q8CBiMtQ", "readable_id": "domain-of-algebraic-function-examples"}, "hoa1RBk4dTo": {"duration": 210, "path": "khan/math/geometry/basic-geometry/cross-sections/vertical-slice-of-rectangular-pyramid/", "keywords": "", "id": "hoa1RBk4dTo", "title": "Slice a rectangular pyramid", "description": "What happens when you slice vertically into a rectangular pyramid? What kind of geometric shape results?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hoa1RBk4dTo.mp4/hoa1RBk4dTo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hoa1RBk4dTo.mp4/hoa1RBk4dTo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hoa1RBk4dTo.m3u8/hoa1RBk4dTo.m3u8"}, "slug": "vertical-slice-of-rectangular-pyramid", "video_id": "hoa1RBk4dTo", "youtube_id": "hoa1RBk4dTo", "readable_id": "vertical-slice-of-rectangular-pyramid"}, "c38H6UKt3_I": {"duration": 783, "path": "khan/science/physics/mechanical-waves-and-sound/mechanical-waves/introduction-to-waves/", "keywords": "wave, transverse, compression, longitudinal", "id": "c38H6UKt3_I", "title": "Introduction to waves", "description": "Introduction to transverse and longitudinal waves", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/c38H6UKt3_I.mp4/c38H6UKt3_I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/c38H6UKt3_I.mp4/c38H6UKt3_I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/c38H6UKt3_I.m3u8/c38H6UKt3_I.m3u8"}, "slug": "introduction-to-waves", "video_id": "c38H6UKt3_I", "youtube_id": "c38H6UKt3_I", "readable_id": "introduction-to-waves"}, "YbSEybahiVA": {"duration": 382, "path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/delusional-disorder/", "keywords": "Delusional Disorder (Disease Or Medical Condition),Mental Illness (Disease Or Medical Condition),Delusion (Symptom),Health (Industry)", "id": "YbSEybahiVA", "title": "Delusional disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YbSEybahiVA.mp4/YbSEybahiVA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YbSEybahiVA.mp4/YbSEybahiVA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YbSEybahiVA.m3u8/YbSEybahiVA.m3u8"}, "slug": "delusional-disorder", "video_id": "YbSEybahiVA", "youtube_id": "YbSEybahiVA", "readable_id": "delusional-disorder"}, "V0xounKGEXs": {"duration": 128, "path": "khan/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/parallel-and-perpendicular-lines-intro/", "keywords": "", "id": "V0xounKGEXs", "title": "Parallel and perpendicular lines intro", "description": "Do the two lines intersect or stay apart? If they intersect, do they do so thereby creating a 90 degree angle? These are the kinds of questions we ask ourselves when we learn about parallel and perpendicular lines.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/V0xounKGEXs.mp4/V0xounKGEXs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/V0xounKGEXs.mp4/V0xounKGEXs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/V0xounKGEXs.m3u8/V0xounKGEXs.m3u8"}, "slug": "parallel-and-perpendicular-lines-intro", "video_id": "V0xounKGEXs", "youtube_id": "V0xounKGEXs", "readable_id": "parallel-and-perpendicular-lines-intro"}, "ZMLFfTX615w": {"duration": 347, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-binomials/multiplying-binomials/", "keywords": "u11_l2_t3_we3, Multiplying, Binomials, CC_39336_A-APR_1", "id": "ZMLFfTX615w", "title": "How to multiply a binomial by a binomial (example)", "description": "Sal multiplies (3x+2) by (5x-7).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZMLFfTX615w.mp4/ZMLFfTX615w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZMLFfTX615w.mp4/ZMLFfTX615w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZMLFfTX615w.m3u8/ZMLFfTX615w.m3u8"}, "slug": "multiplying-binomials", "video_id": "ZMLFfTX615w", "youtube_id": "ZMLFfTX615w", "readable_id": "multiplying-binomials"}, "LKv0hRyiGCY": {"duration": 203, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/brunelleschi-pazzi-chapel-santa-croce-florence-completed-1460s/", "keywords": "smarthistory, khan academy, santa croce, florence, brunelleschi, pazzi chapel, Renaissance, architecture, Early Renaissance", "id": "LKv0hRyiGCY", "title": "Brunelleschi, Pazzi Chapel", "description": "Filippo Brunelleschi, Pazzi Chapel, Santa Croce, Florence, begun 1420s, completed 1460s Speakers: Dr. Beth Harris and Dt. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LKv0hRyiGCY.mp4/LKv0hRyiGCY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LKv0hRyiGCY.mp4/LKv0hRyiGCY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LKv0hRyiGCY.m3u8/LKv0hRyiGCY.m3u8"}, "slug": "brunelleschi-pazzi-chapel-santa-croce-florence-completed-1460s", "video_id": "LKv0hRyiGCY", "youtube_id": "LKv0hRyiGCY", "readable_id": "brunelleschi-pazzi-chapel-santa-croce-florence-completed-1460s"}, "R5CRZONOHCU": {"duration": 613, "path": "khan/science/physics/newton-gravitation/gravity-newtonian/acceleration-due-to-gravity-at-the-space-station/", "keywords": "newton, law, gravitation", "id": "R5CRZONOHCU", "title": "Acceleration due to gravity at the space station", "description": "What is the acceleration due to gravity at the space station", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R5CRZONOHCU.mp4/R5CRZONOHCU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R5CRZONOHCU.mp4/R5CRZONOHCU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R5CRZONOHCU.m3u8/R5CRZONOHCU.m3u8"}, "slug": "acceleration-due-to-gravity-at-the-space-station", "video_id": "R5CRZONOHCU", "youtube_id": "R5CRZONOHCU", "readable_id": "acceleration-due-to-gravity-at-the-space-station"}, "_E9fG8BYcBo": {"duration": 299, "path": "khan/math/pre-algebra/fractions-pre-alg/decomposing-fractions-pre-alg/decomposing-a-fraction-visually/", "keywords": "", "id": "_E9fG8BYcBo", "title": "Decomposing a fraction visually", "description": "It helps to visually understand what decomposing a fraction looks like. We're pretty sure you're going to like this.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_E9fG8BYcBo.mp4/_E9fG8BYcBo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_E9fG8BYcBo.mp4/_E9fG8BYcBo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_E9fG8BYcBo.m3u8/_E9fG8BYcBo.m3u8"}, "slug": "decomposing-a-fraction-visually", "video_id": "_E9fG8BYcBo", "youtube_id": "_E9fG8BYcBo", "readable_id": "decomposing-a-fraction-visually"}, "EtTGyLsR7lk": {"duration": 289, "path": "khan/humanities/becoming-modern/avant-garde-france/second-empire/charles-garnier-the-paris-op-ra-1860-75/", "keywords": "Garnier, Paris Opera, Smarthistory, Art History, Paris, Opera, Haussmann", "id": "EtTGyLsR7lk", "title": "Garnier, Paris Op\u00e9ra", "description": "Charles Garnier, The Paris Op\u00e9ra, 1860-75", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EtTGyLsR7lk.mp4/EtTGyLsR7lk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EtTGyLsR7lk.mp4/EtTGyLsR7lk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EtTGyLsR7lk.m3u8/EtTGyLsR7lk.m3u8"}, "slug": "charles-garnier-the-paris-op-ra-1860-75", "video_id": "EtTGyLsR7lk", "youtube_id": "EtTGyLsR7lk", "readable_id": "charles-garnier-the-paris-op-ra-1860-75"}, "fRTx45FJWto": {"duration": 659, "path": "khan/test-prep/gmat/problem-solving/gmat-math-5/", "keywords": "GMAT, math, problem, solving", "id": "fRTx45FJWto", "title": "GMAT: Math 5", "description": "24-29, pgs. 155-156", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fRTx45FJWto.mp4/fRTx45FJWto.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fRTx45FJWto.mp4/fRTx45FJWto.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fRTx45FJWto.m3u8/fRTx45FJWto.m3u8"}, "slug": "gmat-math-5", "video_id": "fRTx45FJWto", "youtube_id": "fRTx45FJWto", "readable_id": "gmat-math-5"}, "uWbZlJURkfA": {"duration": 568, "path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-alg-visualizing-a-projection-onto-a-plane/", "keywords": "projection, subspace", "id": "uWbZlJURkfA", "title": "Visualizing a projection onto a plane", "description": "Visualizing a projection onto a plane. Showing that the old and new definitions of projections aren't that different.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uWbZlJURkfA.mp4/uWbZlJURkfA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uWbZlJURkfA.mp4/uWbZlJURkfA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uWbZlJURkfA.m3u8/uWbZlJURkfA.m3u8"}, "slug": "linear-alg-visualizing-a-projection-onto-a-plane", "video_id": "uWbZlJURkfA", "youtube_id": "uWbZlJURkfA", "readable_id": "linear-alg-visualizing-a-projection-onto-a-plane"}, "SrrcBWllLbI": {"duration": 442, "path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-intramolecular-new/", "keywords": "Diels\u2013Alder Reaction,Intramolecular Diels\u2013Alder Cycloaddition", "id": "SrrcBWllLbI", "title": "Diels-Alder: intramolecular", "description": "How to analyze the product of an intramolecular Diels-Alder reaction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SrrcBWllLbI.mp4/SrrcBWllLbI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SrrcBWllLbI.mp4/SrrcBWllLbI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SrrcBWllLbI.m3u8/SrrcBWllLbI.m3u8"}, "slug": "diels-alder-intramolecular-new", "video_id": "SrrcBWllLbI", "youtube_id": "SrrcBWllLbI", "readable_id": "diels-alder-intramolecular-new"}, "FvsSPJoJB3k": {"duration": 254, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/apollonius-boxer-at-rest-c-100-b-c-e/", "keywords": "Apollonius, Boxer at Rest, Boxer, Boxing, 100 B.C.E., bronze, Palazzo Massimo, Museo Nazionale Romano, Rome, Greek, Hellenistic, sculpture, art, art history", "id": "FvsSPJoJB3k", "title": "Apollonius, Seated Boxer", "description": "Apollonius, Boxer at Rest, c. 100 B.C.E., bronze, Hellenistic Period (Palazzo Massimo, Museo Nazionale Romano, Rome). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FvsSPJoJB3k.mp4/FvsSPJoJB3k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FvsSPJoJB3k.mp4/FvsSPJoJB3k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FvsSPJoJB3k.m3u8/FvsSPJoJB3k.m3u8"}, "slug": "apollonius-boxer-at-rest-c-100-b-c-e", "video_id": "FvsSPJoJB3k", "youtube_id": "FvsSPJoJB3k", "readable_id": "apollonius-boxer-at-rest-c-100-b-c-e"}, "yby2zx6q_yQ": {"duration": 385, "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/multiple-sclerosis-risk-factors/", "keywords": "", "id": "yby2zx6q_yQ", "title": "Multiple sclerosis risk factors", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yby2zx6q_yQ.mp4/yby2zx6q_yQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yby2zx6q_yQ.mp4/yby2zx6q_yQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yby2zx6q_yQ.m3u8/yby2zx6q_yQ.m3u8"}, "slug": "multiple-sclerosis-risk-factors", "video_id": "yby2zx6q_yQ", "youtube_id": "yby2zx6q_yQ", "readable_id": "multiple-sclerosis-risk-factors"}, "wRBMmiNHQaE": {"duration": 291, "path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/proof-vertical-angles-are-equal/", "keywords": "Proof, Vertical, Angles, are, Equal", "id": "wRBMmiNHQaE", "title": "Proof: Vertical angles are equal", "description": "Proving that vertical angles are equal", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wRBMmiNHQaE.mp4/wRBMmiNHQaE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wRBMmiNHQaE.mp4/wRBMmiNHQaE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wRBMmiNHQaE.m3u8/wRBMmiNHQaE.m3u8"}, "slug": "proof-vertical-angles-are-equal", "video_id": "wRBMmiNHQaE", "youtube_id": "wRBMmiNHQaE", "readable_id": "proof-vertical-angles-are-equal"}, "qQAhhithHa8": {"duration": 629, "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/example-of-calculating-a-surface-integral-part-2/", "keywords": "surface, integral", "id": "qQAhhithHa8", "title": "Example of calculating a surface integral part 2", "description": "Example of calculating a surface integral part 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qQAhhithHa8.mp4/qQAhhithHa8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qQAhhithHa8.mp4/qQAhhithHa8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qQAhhithHa8.m3u8/qQAhhithHa8.m3u8"}, "slug": "example-of-calculating-a-surface-integral-part-2", "video_id": "qQAhhithHa8", "youtube_id": "qQAhhithHa8", "readable_id": "example-of-calculating-a-surface-integral-part-2"}, "1iAxhc6EflI": {"duration": 528, "path": "khan/test-prep/mcat/chemical-processes/kinetics/collision-theory/", "keywords": "", "id": "1iAxhc6EflI", "title": "Collision theory", "description": "An introduction to collision theory and activation energy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1iAxhc6EflI.mp4/1iAxhc6EflI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1iAxhc6EflI.mp4/1iAxhc6EflI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1iAxhc6EflI.m3u8/1iAxhc6EflI.m3u8"}, "slug": "collision-theory", "video_id": "1iAxhc6EflI", "youtube_id": "1iAxhc6EflI", "readable_id": "collision-theory"}, "ssY1dFl7d30": {"duration": 65, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-monomials/multiplying-monomials/", "keywords": "u11_l2_t3_we1, Multiplying, Monomials, CC_3_G_2, CC_3_MD_7, CC_7_EE_1, CC_8_EE_1, CC_39336_A-APR_1", "id": "ssY1dFl7d30", "title": "How to multiply monomials with one variable (example)", "description": "Sal expresses the area of a rectangle with length 4y and width 2y as a monomial.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ssY1dFl7d30.mp4/ssY1dFl7d30.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ssY1dFl7d30.mp4/ssY1dFl7d30.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ssY1dFl7d30.m3u8/ssY1dFl7d30.m3u8"}, "slug": "multiplying-monomials", "video_id": "ssY1dFl7d30", "youtube_id": "ssY1dFl7d30", "readable_id": "multiplying-monomials"}, "vDqOoI-4Z6M": {"duration": 415, "path": "khan/math/algebra/introduction-to-algebra/feel-for-equations-and-inequalit/variables-expressions-and-equations/", "keywords": "Variables, Expressions, and, Equations", "id": "vDqOoI-4Z6M", "title": "What are variables, expressions, and equations?", "description": "Learn what variables, expressions, and equations really are.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vDqOoI-4Z6M.mp4/vDqOoI-4Z6M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vDqOoI-4Z6M.mp4/vDqOoI-4Z6M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vDqOoI-4Z6M.m3u8/vDqOoI-4Z6M.m3u8"}, "slug": "variables-expressions-and-equations", "video_id": "vDqOoI-4Z6M", "youtube_id": "vDqOoI-4Z6M", "readable_id": "variables-expressions-and-equations"}, "HERb3x0aw6c": {"duration": 204, "path": "khan/math/algebra/algebra-functions/interpreting-function-notation/interpreting-function-notation-example-1/", "keywords": "", "id": "HERb3x0aw6c", "title": "How to interpret an expression with function notation (example with a function that models a bank account)", "description": "Sal interprets the expression M(30)-M(0)=100 where M models an account balance over time.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HERb3x0aw6c.mp4/HERb3x0aw6c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HERb3x0aw6c.mp4/HERb3x0aw6c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HERb3x0aw6c.m3u8/HERb3x0aw6c.m3u8"}, "slug": "interpreting-function-notation-example-1", "video_id": "HERb3x0aw6c", "youtube_id": "HERb3x0aw6c", "readable_id": "interpreting-function-notation-example-1"}, "B5wT4_JJMAI": {"duration": 62, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/items-series-basic/", "keywords": "education,online learning,learning,lessons", "id": "B5wT4_JJMAI", "title": "Writing: Items in a series \u2014 Basic example", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0items in a series.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/B5wT4_JJMAI.mp4/B5wT4_JJMAI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/B5wT4_JJMAI.mp4/B5wT4_JJMAI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/B5wT4_JJMAI.m3u8/B5wT4_JJMAI.m3u8"}, "slug": "items-series-basic", "video_id": "B5wT4_JJMAI", "youtube_id": "B5wT4_JJMAI", "readable_id": "items-series-basic"}, "nLi5-KKcmY0": {"duration": 724, "path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/crash-course-world-history-12/", "keywords": "crash course", "id": "nLi5-KKcmY0", "title": "Fall of Rome the Roman Empire... in the 15th Century", "description": "In which John Green teaches you about the fall of the Roman Empire, which happened considerably later than you may have been told. While the Western Roman Empire fell to barbarians in 476 CE, the Byzantines in Constantinople continued the Eastern Empire nicely, calling themselves Romans for a further 1000 years. Find out what Justinian and the rest of the Byzantine emperors were up to over there, and how the Roman Empire dragged out its famous Decline well into medieval times. In addition to all this, you'll learn about ancient sports riots and hipster barbarians, too.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nLi5-KKcmY0.mp4/nLi5-KKcmY0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nLi5-KKcmY0.mp4/nLi5-KKcmY0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nLi5-KKcmY0.m3u8/nLi5-KKcmY0.m3u8"}, "slug": "crash-course-world-history-12", "video_id": "nLi5-KKcmY0", "youtube_id": "nLi5-KKcmY0", "readable_id": "crash-course-world-history-12"}, "9wOalujeZf4": {"duration": 671, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/slope-intercept-form/graphs-using-slope-intercept-form/", "keywords": "Graphs, Using, Slope, Intercept, Form, CC_39336_F-IF_7_a", "id": "9wOalujeZf4", "title": "Slope-intercept equation from a graph examples", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9wOalujeZf4.mp4/9wOalujeZf4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9wOalujeZf4.mp4/9wOalujeZf4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9wOalujeZf4.m3u8/9wOalujeZf4.m3u8"}, "slug": "graphs-using-slope-intercept-form", "video_id": "9wOalujeZf4", "youtube_id": "9wOalujeZf4", "readable_id": "graphs-using-slope-intercept-form"}, "ZiqHJwzv_HI": {"duration": 227, "path": "khan/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/measure-of-circumscribed-angle/", "keywords": "", "id": "ZiqHJwzv_HI", "title": "Measure of circumscribed angle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZiqHJwzv_HI.mp4/ZiqHJwzv_HI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZiqHJwzv_HI.mp4/ZiqHJwzv_HI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZiqHJwzv_HI.m3u8/ZiqHJwzv_HI.m3u8"}, "slug": "measure-of-circumscribed-angle", "video_id": "ZiqHJwzv_HI", "youtube_id": "ZiqHJwzv_HI", "readable_id": "measure-of-circumscribed-angle"}, "sMrm4g6Aj4Y": {"duration": 567, "path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-stability-v/", "keywords": "", "id": "sMrm4g6Aj4Y", "title": "Aromatic stability V", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sMrm4g6Aj4Y.mp4/sMrm4g6Aj4Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sMrm4g6Aj4Y.mp4/sMrm4g6Aj4Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sMrm4g6Aj4Y.m3u8/sMrm4g6Aj4Y.m3u8"}, "slug": "aromatic-stability-v", "video_id": "sMrm4g6Aj4Y", "youtube_id": "sMrm4g6Aj4Y", "readable_id": "aromatic-stability-v"}, "BWs-ONRDDG4": {"duration": 563, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables/cepheid-variables-1/", "keywords": "Cepheid, Variables, Henrietta, Swan, leavitt, magellanic, cloud", "id": "BWs-ONRDDG4", "title": "Cepheid variables 1", "description": "Cepheid Variables 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BWs-ONRDDG4.mp4/BWs-ONRDDG4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BWs-ONRDDG4.mp4/BWs-ONRDDG4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BWs-ONRDDG4.m3u8/BWs-ONRDDG4.m3u8"}, "slug": "cepheid-variables-1", "video_id": "BWs-ONRDDG4", "youtube_id": "BWs-ONRDDG4", "readable_id": "cepheid-variables-1"}, "JDo9LNMOLtE": {"duration": 243, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/heart-failure-treatment-late-stages/", "keywords": "", "id": "JDo9LNMOLtE", "title": "Heart failure treatment - Late stages", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JDo9LNMOLtE.mp4/JDo9LNMOLtE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JDo9LNMOLtE.mp4/JDo9LNMOLtE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JDo9LNMOLtE.m3u8/JDo9LNMOLtE.m3u8"}, "slug": "heart-failure-treatment-late-stages", "video_id": "JDo9LNMOLtE", "youtube_id": "JDo9LNMOLtE", "readable_id": "heart-failure-treatment-late-stages"}, "xoUppFlif04": {"duration": 586, "path": "khan/science/physics/oscillatory-motion/harmonic-motion/harmonic-motion-part-2-calculus/", "keywords": "Harmonic, Motion, Differential, Equation, spring", "id": "xoUppFlif04", "title": "Harmonic motion part 2 (calculus)", "description": "We test whether Acos(wt) can describe the motion of the mass on a spring by substituting into the differential equation F=-kx", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xoUppFlif04.mp4/xoUppFlif04.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xoUppFlif04.mp4/xoUppFlif04.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xoUppFlif04.m3u8/xoUppFlif04.m3u8"}, "slug": "harmonic-motion-part-2-calculus", "video_id": "xoUppFlif04", "youtube_id": "xoUppFlif04", "readable_id": "harmonic-motion-part-2-calculus"}, "Tmt4zrDK3dA": {"duration": 529, "path": "khan/science/biology/her/tree-of-life/species/", "keywords": "taxonomy", "id": "Tmt4zrDK3dA", "title": "Species", "description": "What a species is and isn't. Ligers, tiglons, mule, hinnies, and dogs", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Tmt4zrDK3dA.mp4/Tmt4zrDK3dA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Tmt4zrDK3dA.mp4/Tmt4zrDK3dA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Tmt4zrDK3dA.m3u8/Tmt4zrDK3dA.m3u8"}, "slug": "species", "video_id": "Tmt4zrDK3dA", "youtube_id": "Tmt4zrDK3dA", "readable_id": "species"}, "qjZnIpZ-EcY": {"duration": 627, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e1-elimination-regioselectivity-and-stereoselectivity/", "keywords": "", "id": "qjZnIpZ-EcY", "title": "E1 elimination: Regioselectivity and stereoselectivity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qjZnIpZ-EcY.mp4/qjZnIpZ-EcY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qjZnIpZ-EcY.mp4/qjZnIpZ-EcY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qjZnIpZ-EcY.m3u8/qjZnIpZ-EcY.m3u8"}, "slug": "e1-elimination-regioselectivity-and-stereoselectivity", "video_id": "qjZnIpZ-EcY", "youtube_id": "qjZnIpZ-EcY", "readable_id": "e1-elimination-regioselectivity-and-stereoselectivity"}, "3KbEACrLCJU": {"duration": 63, "path": "khan/partner-content/exploratorium/light-and-color/colored-shadows/colored-shadows-yellow-and-cyan-solution/", "keywords": "", "id": "3KbEACrLCJU", "title": "Yellow and cyan solution", "description": "Each color you see comes from the pencil blocking one of the lights and the other two filling in the shadow.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3KbEACrLCJU.mp4/3KbEACrLCJU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3KbEACrLCJU.mp4/3KbEACrLCJU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3KbEACrLCJU.m3u8/3KbEACrLCJU.m3u8"}, "slug": "colored-shadows-yellow-and-cyan-solution", "video_id": "3KbEACrLCJU", "youtube_id": "3KbEACrLCJU", "readable_id": "colored-shadows-yellow-and-cyan-solution"}, "jWVdmanh8w4": {"duration": 171, "path": "khan/partner-content/big-history-project/stars-and-elements/creation-complex-elements/bhp-new-chemical-elements/", "keywords": "", "id": "jWVdmanh8w4", "title": "Threshold 3: New Chemical Elements", "description": "Large stars die, and then explode into massive supernovae. This scatters all the elements of the periodic table throughout the Universe, which results in Threshold 3.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jWVdmanh8w4.mp4/jWVdmanh8w4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jWVdmanh8w4.mp4/jWVdmanh8w4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jWVdmanh8w4.m3u8/jWVdmanh8w4.m3u8"}, "slug": "bhp-new-chemical-elements", "video_id": "jWVdmanh8w4", "youtube_id": "jWVdmanh8w4", "readable_id": "bhp-new-chemical-elements"}, "yQtUyBrRBx4": {"duration": 834, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/equity-vs-debt/", "keywords": "equity, debt, ipo, enterprise, value, asset, liability", "id": "yQtUyBrRBx4", "title": "Equity vs. debt", "description": "Debt vs. Equity. Market Capitalization, Asset Value, and Enterprise Value.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yQtUyBrRBx4.mp4/yQtUyBrRBx4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yQtUyBrRBx4.mp4/yQtUyBrRBx4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yQtUyBrRBx4.m3u8/yQtUyBrRBx4.m3u8"}, "slug": "equity-vs-debt", "video_id": "yQtUyBrRBx4", "youtube_id": "yQtUyBrRBx4", "readable_id": "equity-vs-debt"}, "mBMAMIFw9n4": {"duration": 415, "path": "khan/partner-content/wi-phi/metaphys-epistemology/cosmological-argument-part-2/", "keywords": "", "id": "mBMAMIFw9n4", "title": "Religion: Cosmological Argument, Part 2", "description": "Part 2 of a pair. Tim moves on to the version of the Cosmological Argument for the existence of God called 'the Modal Argument.' The idea is that all the contingent facts about the world need to be explained by some necessary fact, and that necessary fact is that God exists.\n\nSpeaker: Dr.\u00a0Timothy Yenter, Assistant Professor of Philosophy, University of Mississippi", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mBMAMIFw9n4.mp4/mBMAMIFw9n4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mBMAMIFw9n4.mp4/mBMAMIFw9n4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mBMAMIFw9n4.m3u8/mBMAMIFw9n4.m3u8"}, "slug": "cosmological-argument-part-2", "video_id": "mBMAMIFw9n4", "youtube_id": "mBMAMIFw9n4", "readable_id": "cosmological-argument-part-2"}, "J4DdH8VBn88": {"duration": 31, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/penny-battery/penny-battery-challenge-1/", "keywords": "", "id": "J4DdH8VBn88", "title": "Challenge: Design a more powerful battery", "description": "So now you know how to light a red LED. What about a blue one? Hint: a blue LED requires more power.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J4DdH8VBn88.mp4/J4DdH8VBn88.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J4DdH8VBn88.mp4/J4DdH8VBn88.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J4DdH8VBn88.m3u8/J4DdH8VBn88.m3u8"}, "slug": "penny-battery-challenge-1", "video_id": "J4DdH8VBn88", "youtube_id": "J4DdH8VBn88", "readable_id": "penny-battery-challenge-1"}, "hTzI6x4fmGI": {"duration": 597, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/leukemia-diagnosis/", "keywords": "", "id": "hTzI6x4fmGI", "title": "Leukemia diagnosis", "description": "Often health care professionals conduct a variety of blood tests to determine if someone has leukemia. Leukemia patients often have decreased levels of platelets, white blood cells (WBCs), red blood cells (RBCs), hematocrit, and hemoglobin. Other tests such as bone marrow aspirations can reveal an increase in immature blast cells. Learn how health professionals classify leukemia by staining sample tissue with a dye and by looking for chromosome translocation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hTzI6x4fmGI.mp4/hTzI6x4fmGI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hTzI6x4fmGI.mp4/hTzI6x4fmGI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hTzI6x4fmGI.m3u8/hTzI6x4fmGI.m3u8"}, "slug": "leukemia-diagnosis", "video_id": "hTzI6x4fmGI", "youtube_id": "hTzI6x4fmGI", "readable_id": "leukemia-diagnosis"}, "WR2R_wrdEVY": {"duration": 86, "path": "khan/math/geometry/geometric-constructions/geo-bisectors/constructing-a-perpendicular-bisector-using-a-compass-and-straightedge/", "keywords": "", "id": "WR2R_wrdEVY", "title": "Constructing a perpendicular bisector using a compass and straightedge", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WR2R_wrdEVY.mp4/WR2R_wrdEVY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WR2R_wrdEVY.mp4/WR2R_wrdEVY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WR2R_wrdEVY.m3u8/WR2R_wrdEVY.m3u8"}, "slug": "constructing-a-perpendicular-bisector-using-a-compass-and-straightedge", "video_id": "WR2R_wrdEVY", "youtube_id": "WR2R_wrdEVY", "readable_id": "constructing-a-perpendicular-bisector-using-a-compass-and-straightedge"}, "G8lI6niHjKU": {"duration": 135, "path": "khan/science/discoveries-projects/discovery-lab-2012/khan-dl-week-3-vannesa-melvin-greta/", "keywords": "", "id": "G8lI6niHjKU", "title": "DLab: Students present their reverse engineering project", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/G8lI6niHjKU.mp4/G8lI6niHjKU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/G8lI6niHjKU.mp4/G8lI6niHjKU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/G8lI6niHjKU.m3u8/G8lI6niHjKU.m3u8"}, "slug": "khan-dl-week-3-vannesa-melvin-greta", "video_id": "G8lI6niHjKU", "youtube_id": "G8lI6niHjKU", "readable_id": "khan-dl-week-3-vannesa-melvin-greta"}, "enr7JqvehJs": {"duration": 586, "path": "khan/science/physics/electricity-magnetism/electric-motors/calculating-dot-and-cross-products-with-unit-vector-notation/", "keywords": "vector, dot, cross, product", "id": "enr7JqvehJs", "title": "Calculating dot and cross products with unit vector notation", "description": "Calculating the dot and cross products when vectors are presented in their x, y, and z (or i,j, and k) components.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/enr7JqvehJs.mp4/enr7JqvehJs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/enr7JqvehJs.mp4/enr7JqvehJs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/enr7JqvehJs.m3u8/enr7JqvehJs.m3u8"}, "slug": "calculating-dot-and-cross-products-with-unit-vector-notation", "video_id": "enr7JqvehJs", "youtube_id": "enr7JqvehJs", "readable_id": "calculating-dot-and-cross-products-with-unit-vector-notation"}, "tFhBAeZVTMw": {"duration": 342, "path": "khan/math/geometry/basic-geometry/area_non_standard/area-of-a-parallelogram/", "keywords": "geometry", "id": "tFhBAeZVTMw", "title": "Area of a parallelogram", "description": "Guess what's interesting about the opposite sides of a parallelogram? That's right....they are parallel! Let's find the area--base times height", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tFhBAeZVTMw.mp4/tFhBAeZVTMw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tFhBAeZVTMw.mp4/tFhBAeZVTMw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tFhBAeZVTMw.m3u8/tFhBAeZVTMw.m3u8"}, "slug": "area-of-a-parallelogram", "video_id": "tFhBAeZVTMw", "youtube_id": "tFhBAeZVTMw", "readable_id": "area-of-a-parallelogram"}, "gZu9Hhz23EY": {"duration": 811, "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/proton-nmr-practice-2/", "keywords": "", "id": "gZu9Hhz23EY", "title": "Proton NMR practice 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gZu9Hhz23EY.mp4/gZu9Hhz23EY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gZu9Hhz23EY.mp4/gZu9Hhz23EY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gZu9Hhz23EY.m3u8/gZu9Hhz23EY.m3u8"}, "slug": "proton-nmr-practice-2", "video_id": "gZu9Hhz23EY", "youtube_id": "gZu9Hhz23EY", "readable_id": "proton-nmr-practice-2"}, "__pl88NO9Jw": {"duration": 263, "path": "khan/humanities/medieval-world/latin-western-europe/ottonian1/saint-michaels-hildesheim/", "keywords": "art history, ottonian, medieval art", "id": "__pl88NO9Jw", "title": "Bronze doors, Saint Michael's, Hildesheim, commissioned by Bishop Bernward, 1015", "description": "Bronze doors, 1015, commissioned by Bishop Bernward for Saint Michael's, Hildesheim (Germany).\n\nA conversation with Dr. Nancy Ross and Jennifer Freeman.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/__pl88NO9Jw.mp4/__pl88NO9Jw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/__pl88NO9Jw.mp4/__pl88NO9Jw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/__pl88NO9Jw.m3u8/__pl88NO9Jw.m3u8"}, "slug": "saint-michaels-hildesheim", "video_id": "__pl88NO9Jw", "youtube_id": "__pl88NO9Jw", "readable_id": "saint-michaels-hildesheim"}, "xp6ibuI8UuQ": {"duration": 774, "path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/visualizing-vectors-in-2-dimensions/", "keywords": "physics, vectors, dimensions, components", "id": "xp6ibuI8UuQ", "title": "Visualizing vectors in 2 dimensions", "description": "Visualizing, adding and breaking down vectors in 2 dimensions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xp6ibuI8UuQ.mp4/xp6ibuI8UuQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xp6ibuI8UuQ.mp4/xp6ibuI8UuQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xp6ibuI8UuQ.m3u8/xp6ibuI8UuQ.m3u8"}, "slug": "visualizing-vectors-in-2-dimensions", "video_id": "xp6ibuI8UuQ", "youtube_id": "xp6ibuI8UuQ", "readable_id": "visualizing-vectors-in-2-dimensions"}, "Iarv4xiYFA4": {"duration": 117, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-4-15/", "keywords": "", "id": "Iarv4xiYFA4", "title": "15 Area of tilted square", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Iarv4xiYFA4.mp4/Iarv4xiYFA4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Iarv4xiYFA4.mp4/Iarv4xiYFA4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Iarv4xiYFA4.m3u8/Iarv4xiYFA4.m3u8"}, "slug": "sat-2010-may-4-15", "video_id": "Iarv4xiYFA4", "youtube_id": "Iarv4xiYFA4", "readable_id": "sat-2010-may-4-15"}, "tDdtAF3WtIY": {"duration": 129, "path": "khan/math/recreational-math/math-warmup/probabilty-warmup/problem-of-points2/", "keywords": "", "id": "tDdtAF3WtIY", "title": "Problem of Points 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tDdtAF3WtIY.mp4/tDdtAF3WtIY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tDdtAF3WtIY.mp4/tDdtAF3WtIY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tDdtAF3WtIY.m3u8/tDdtAF3WtIY.m3u8"}, "slug": "problem-of-points2", "video_id": "tDdtAF3WtIY", "youtube_id": "tDdtAF3WtIY", "readable_id": "problem-of-points2"}, "8mAZYv5wIcE": {"duration": 1130, "path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-algebra-least-squares-examples/", "keywords": "least, squares, approximation, solution", "id": "8mAZYv5wIcE", "title": "Least squares examples", "description": "An example using the least squares solution to an unsolvable system", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8mAZYv5wIcE.mp4/8mAZYv5wIcE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8mAZYv5wIcE.mp4/8mAZYv5wIcE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8mAZYv5wIcE.m3u8/8mAZYv5wIcE.m3u8"}, "slug": "linear-algebra-least-squares-examples", "video_id": "8mAZYv5wIcE", "youtube_id": "8mAZYv5wIcE", "readable_id": "linear-algebra-least-squares-examples"}, "F_ySQvjtAxQ": {"duration": 999, "path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/french-invasion-of-russia/", "keywords": "Napoleon, Russia, Invasion", "id": "F_ySQvjtAxQ", "title": "French invasion of Russia", "description": "Napoleon's disastrous invasion of Russia", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F_ySQvjtAxQ.mp4/F_ySQvjtAxQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F_ySQvjtAxQ.mp4/F_ySQvjtAxQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F_ySQvjtAxQ.m3u8/F_ySQvjtAxQ.m3u8"}, "slug": "french-invasion-of-russia", "video_id": "F_ySQvjtAxQ", "youtube_id": "F_ySQvjtAxQ", "readable_id": "french-invasion-of-russia"}, "xLYVo_k0_us": {"duration": 165, "path": "khan/math/algebra/introduction-to-algebra/writing-expressions-tutorial/writing-expressions-2/", "keywords": "", "id": "xLYVo_k0_us", "title": "How to write algebraic expressions with parentheses", "description": "Learn how to write algebraic expressions that involve grouping quantities in parentheses.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xLYVo_k0_us.mp4/xLYVo_k0_us.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xLYVo_k0_us.mp4/xLYVo_k0_us.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xLYVo_k0_us.m3u8/xLYVo_k0_us.m3u8"}, "slug": "writing-expressions-2", "video_id": "xLYVo_k0_us", "youtube_id": "xLYVo_k0_us", "readable_id": "writing-expressions-2"}, "1hihcoJPzz0": {"duration": 178, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-4-11/", "keywords": "", "id": "1hihcoJPzz0", "title": "11 Computing with set members", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1hihcoJPzz0.mp4/1hihcoJPzz0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1hihcoJPzz0.mp4/1hihcoJPzz0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1hihcoJPzz0.m3u8/1hihcoJPzz0.m3u8"}, "slug": "sat-2008-may-4-11", "video_id": "1hihcoJPzz0", "youtube_id": "1hihcoJPzz0", "readable_id": "sat-2008-may-4-11"}, "5EWjlpc0S00": {"duration": 594, "path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/fluids-part-3/", "keywords": "physics, chemistry, density, pressure", "id": "5EWjlpc0S00", "title": "Pressure at a depth in a fluid", "description": "Sal derives the formula to determine the pressure at a specific depth in a fluid.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5EWjlpc0S00.mp4/5EWjlpc0S00.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5EWjlpc0S00.mp4/5EWjlpc0S00.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5EWjlpc0S00.m3u8/5EWjlpc0S00.m3u8"}, "slug": "fluids-part-3", "video_id": "5EWjlpc0S00", "youtube_id": "5EWjlpc0S00", "readable_id": "fluids-part-3"}, "q3N1IqBoKSo": {"duration": 274, "path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-madonna-of-the-clouds-c-1425-35/", "keywords": "Donatello, MFA, Boston, Renaissance, Italy, Relief, Sculpture, Florence, Italian, Madonna of the Clouds, Madonna, Clouds, Khan Academy, smarthistory, art history, Google Art Project, OER, painting", "id": "q3N1IqBoKSo", "title": "Donatello, Madonna of the Clouds", "description": "Donatello, Madonna of the Clouds, c. 1425--35, marble, 33.1 x 32 cm / 13 1/16 x 12 5/8 inches (Museum of Fine Arts, Boston)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q3N1IqBoKSo.mp4/q3N1IqBoKSo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q3N1IqBoKSo.mp4/q3N1IqBoKSo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q3N1IqBoKSo.m3u8/q3N1IqBoKSo.m3u8"}, "slug": "donatello-madonna-of-the-clouds-c-1425-35", "video_id": "q3N1IqBoKSo", "youtube_id": "q3N1IqBoKSo", "readable_id": "donatello-madonna-of-the-clouds-c-1425-35"}, "KoYZErFpZ5Q": {"duration": 474, "path": "khan/math/trigonometry/unit-circle-trig-func/trig-functions-special-angles/solving-triangle-unit-circle/", "keywords": "", "id": "KoYZErFpZ5Q", "title": "Solving triangle in unit circle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KoYZErFpZ5Q.mp4/KoYZErFpZ5Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KoYZErFpZ5Q.mp4/KoYZErFpZ5Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KoYZErFpZ5Q.m3u8/KoYZErFpZ5Q.m3u8"}, "slug": "solving-triangle-unit-circle", "video_id": "KoYZErFpZ5Q", "youtube_id": "KoYZErFpZ5Q", "readable_id": "solving-triangle-unit-circle"}, "k2_PdizIgN4": {"duration": 374, "path": "khan/science/discoveries-projects/robots/spider_bot/6-connect-spider-s-power-switch-and-run-the-power-wires-to-the-motor-controller/", "keywords": "", "id": "k2_PdizIgN4", "title": "Spider's power switch", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/k2_PdizIgN4.mp4/k2_PdizIgN4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/k2_PdizIgN4.mp4/k2_PdizIgN4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/k2_PdizIgN4.m3u8/k2_PdizIgN4.m3u8"}, "slug": "6-connect-spider-s-power-switch-and-run-the-power-wires-to-the-motor-controller", "video_id": "k2_PdizIgN4", "youtube_id": "k2_PdizIgN4", "readable_id": "6-connect-spider-s-power-switch-and-run-the-power-wires-to-the-motor-controller"}, "6LurHwFfrIA": {"duration": 330, "path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/masaccio-madonna-enthroned-1426/", "keywords": "Masaccio, Madonna Enthroned, National Gallery, London, Art History, Smarthistory", "id": "6LurHwFfrIA", "title": "Masaccio, Virgin and Child Enthroned", "description": "Masaccio (Tommaso di Ser Giovanni di Simone), Virgin and Child Enthroned, 1426, tempera on panel (National Gallery, London). Ser Giuliano degli Scarsi, a notary from Pisa commissioned this altarpiece for the chapel of Saint Julian in Santa Maria del Carmine, Pisa Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6LurHwFfrIA.mp4/6LurHwFfrIA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6LurHwFfrIA.mp4/6LurHwFfrIA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6LurHwFfrIA.m3u8/6LurHwFfrIA.m3u8"}, "slug": "masaccio-madonna-enthroned-1426", "video_id": "6LurHwFfrIA", "youtube_id": "6LurHwFfrIA", "readable_id": "masaccio-madonna-enthroned-1426"}, "JyArK4jw3XU": {"duration": 321, "path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/integrating-scaled-function/", "keywords": "", "id": "JyArK4jw3XU", "title": "Integrating scaled version of function", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JyArK4jw3XU.mp4/JyArK4jw3XU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JyArK4jw3XU.mp4/JyArK4jw3XU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JyArK4jw3XU.m3u8/JyArK4jw3XU.m3u8"}, "slug": "integrating-scaled-function", "video_id": "JyArK4jw3XU", "youtube_id": "JyArK4jw3XU", "readable_id": "integrating-scaled-function"}, "SCo1m7OEqac": {"duration": 761, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/preload-stretches-out-the-heart-cells/", "keywords": "", "id": "SCo1m7OEqac", "title": "Preload stretches out the heart cells", "description": "Find out why stretching a heart cell in diastole affects how forcefully it contracts in systole. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SCo1m7OEqac.mp4/SCo1m7OEqac.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SCo1m7OEqac.mp4/SCo1m7OEqac.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SCo1m7OEqac.m3u8/SCo1m7OEqac.m3u8"}, "slug": "preload-stretches-out-the-heart-cells", "video_id": "SCo1m7OEqac", "youtube_id": "SCo1m7OEqac", "readable_id": "preload-stretches-out-the-heart-cells"}, "mLE-SlOZToc": {"duration": 596, "path": "khan/math/precalculus/prob_comb/basic_prob_precalc/probability-1-module-examples/", "keywords": "probability, CC_7_SP_6, CC_7_SP_7_a, CC_7_SP_7_b", "id": "mLE-SlOZToc", "title": "Finding probablity example 2", "description": "In this example we are figuring out the probability of randomly picking a non-blue marble from a bag. Again, we'll have to think about the possible outcomes first.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mLE-SlOZToc.mp4/mLE-SlOZToc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mLE-SlOZToc.mp4/mLE-SlOZToc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mLE-SlOZToc.m3u8/mLE-SlOZToc.m3u8"}, "slug": "probability-1-module-examples", "video_id": "mLE-SlOZToc", "youtube_id": "mLE-SlOZToc", "readable_id": "probability-1-module-examples"}, "qTXZ6UrO54U": {"duration": 559, "path": "khan/test-prep/mcat/chemical-processes/bioenergetics/gibbs-free-energy-an-analogy/", "keywords": "", "id": "qTXZ6UrO54U", "title": "An analogy for Gibbs free energy", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qTXZ6UrO54U.mp4/qTXZ6UrO54U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qTXZ6UrO54U.mp4/qTXZ6UrO54U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qTXZ6UrO54U.m3u8/qTXZ6UrO54U.m3u8"}, "slug": "gibbs-free-energy-an-analogy", "video_id": "qTXZ6UrO54U", "youtube_id": "qTXZ6UrO54U", "readable_id": "gibbs-free-energy-an-analogy"}, "OhUkMQtBGmE": {"duration": 468, "path": "khan/math/probability/regression/regression-correlation/fitting-a-line-to-data/", "keywords": "Fitting, Line, to, Data, CC_8_SP_2, CC_8_SP_3", "id": "OhUkMQtBGmE", "title": "Fitting a line to data", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OhUkMQtBGmE.mp4/OhUkMQtBGmE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OhUkMQtBGmE.mp4/OhUkMQtBGmE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OhUkMQtBGmE.m3u8/OhUkMQtBGmE.m3u8"}, "slug": "fitting-a-line-to-data", "video_id": "OhUkMQtBGmE", "youtube_id": "OhUkMQtBGmE", "readable_id": "fitting-a-line-to-data"}, "slm6D2VEXYs": {"duration": 808, "path": "khan/science/biology/cellular-molecular-biology/photosynthesis/photosynthesis-calvin-cycle/", "keywords": "photosynthesis, dark, reactions, calvin, cycle", "id": "slm6D2VEXYs", "title": "Photosynthesis: Calvin cycle", "description": "The Calvin Cycle or the light-independent (dark) reactions of photosythesis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/slm6D2VEXYs.mp4/slm6D2VEXYs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/slm6D2VEXYs.mp4/slm6D2VEXYs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/slm6D2VEXYs.m3u8/slm6D2VEXYs.m3u8"}, "slug": "photosynthesis-calvin-cycle", "video_id": "slm6D2VEXYs", "youtube_id": "slm6D2VEXYs", "readable_id": "photosynthesis-calvin-cycle"}, "8iwauKeqm2w": {"duration": 689, "path": "khan/science/organic-chemistry/aromatic-compounds/naming-aromatic/naming-benzene-derivatives/", "keywords": "", "id": "8iwauKeqm2w", "title": "Naming benzene derivatives", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8iwauKeqm2w.mp4/8iwauKeqm2w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8iwauKeqm2w.mp4/8iwauKeqm2w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8iwauKeqm2w.m3u8/8iwauKeqm2w.m3u8"}, "slug": "naming-benzene-derivatives", "video_id": "8iwauKeqm2w", "youtube_id": "8iwauKeqm2w", "readable_id": "naming-benzene-derivatives"}, "Q7HbtnOyKMg": {"duration": 630, "path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/wealth-destruction-1/", "keywords": "bailout, paulson, credit, crisis, bernanke, bubble, housing", "id": "Q7HbtnOyKMg", "title": "Wealth destruction 1", "description": "How bubbles destroy wealth.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q7HbtnOyKMg.mp4/Q7HbtnOyKMg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q7HbtnOyKMg.mp4/Q7HbtnOyKMg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q7HbtnOyKMg.m3u8/Q7HbtnOyKMg.m3u8"}, "slug": "wealth-destruction-1", "video_id": "Q7HbtnOyKMg", "youtube_id": "Q7HbtnOyKMg", "readable_id": "wealth-destruction-1"}, "VIfQh71XwMM": {"duration": 585, "path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/osteoarthritis-vs-rheumatoid-arthritis-pathophysiology/", "keywords": "", "id": "VIfQh71XwMM", "title": "Osteoarthritis vs rheumatoid arthritis pathophysiology", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VIfQh71XwMM.mp4/VIfQh71XwMM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VIfQh71XwMM.mp4/VIfQh71XwMM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VIfQh71XwMM.m3u8/VIfQh71XwMM.m3u8"}, "slug": "osteoarthritis-vs-rheumatoid-arthritis-pathophysiology", "video_id": "VIfQh71XwMM", "youtube_id": "VIfQh71XwMM", "readable_id": "osteoarthritis-vs-rheumatoid-arthritis-pathophysiology"}, "62ZlRO8BCUw": {"duration": 160, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/linda-jeschofnig/kauffman-linda-jeschofnig-2/", "keywords": "", "id": "62ZlRO8BCUw", "title": "A Passion for Science Education", "description": "A passion for science education led Linda Jeschognig from her life in accounting to a second act as an entrepreneur. She talks about the inspiration behind Hands-on Labs and overcoming the obstacles with a company created to send kits containing hydrochloric acid, cobalt nitrate and other hazardous elements to college chemistry students. Along the way, Jeschofnig has gained support and reached out to guide other women on the entrepreneurial path.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/62ZlRO8BCUw.mp4/62ZlRO8BCUw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/62ZlRO8BCUw.mp4/62ZlRO8BCUw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/62ZlRO8BCUw.m3u8/62ZlRO8BCUw.m3u8"}, "slug": "kauffman-linda-jeschofnig-2", "video_id": "62ZlRO8BCUw", "youtube_id": "62ZlRO8BCUw", "readable_id": "kauffman-linda-jeschofnig-2"}, "dHi9ctwDUnc": {"duration": 833, "path": "khan/test-prep/mcat/organ-systems/hematologic-system/bohr-effect-vs-haldane-effect/", "keywords": "", "id": "dHi9ctwDUnc", "title": "Bohr effect vs. Haldane effect", "description": "Take a close look at how some friendly competition for Hemoglobin allows the body to more efficiently move oxygen and carbon Dioxide around. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dHi9ctwDUnc.mp4/dHi9ctwDUnc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dHi9ctwDUnc.mp4/dHi9ctwDUnc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dHi9ctwDUnc.m3u8/dHi9ctwDUnc.m3u8"}, "slug": "bohr-effect-vs-haldane-effect", "video_id": "dHi9ctwDUnc", "youtube_id": "dHi9ctwDUnc", "readable_id": "bohr-effect-vs-haldane-effect"}, "x3EMTQQjoA0": {"duration": 466, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/placenta-accreta/", "keywords": "", "id": "x3EMTQQjoA0", "title": "Placenta accreta", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x3EMTQQjoA0.mp4/x3EMTQQjoA0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x3EMTQQjoA0.mp4/x3EMTQQjoA0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x3EMTQQjoA0.m3u8/x3EMTQQjoA0.m3u8"}, "slug": "placenta-accreta", "video_id": "x3EMTQQjoA0", "youtube_id": "x3EMTQQjoA0", "readable_id": "placenta-accreta"}, "ahaHgqwt_LA": {"duration": 412, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/supply-curve-tutorial/long-term-supply-curve-1/", "keywords": "", "id": "ahaHgqwt_LA", "title": "Long term supply curve", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ahaHgqwt_LA.mp4/ahaHgqwt_LA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ahaHgqwt_LA.mp4/ahaHgqwt_LA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ahaHgqwt_LA.m3u8/ahaHgqwt_LA.m3u8"}, "slug": "long-term-supply-curve-1", "video_id": "ahaHgqwt_LA", "youtube_id": "ahaHgqwt_LA", "readable_id": "long-term-supply-curve-1"}, "Mmev06nabvk": {"duration": 647, "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/the-basal-ganglia-the-direct-pathway/", "keywords": "", "id": "Mmev06nabvk", "title": "The basal ganglia - The direct pathway", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mmev06nabvk.mp4/Mmev06nabvk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mmev06nabvk.mp4/Mmev06nabvk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mmev06nabvk.m3u8/Mmev06nabvk.m3u8"}, "slug": "the-basal-ganglia-the-direct-pathway", "video_id": "Mmev06nabvk", "youtube_id": "Mmev06nabvk", "readable_id": "the-basal-ganglia-the-direct-pathway"}, "ZPRMFBN8p4Q": {"duration": 266, "path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-2-rhythm-dotted-notes-ties-and-rests/", "keywords": "", "id": "ZPRMFBN8p4Q", "title": "Lesson 2: Rhythm, dotted notes, ties, and rests", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZPRMFBN8p4Q.mp4/ZPRMFBN8p4Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZPRMFBN8p4Q.mp4/ZPRMFBN8p4Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZPRMFBN8p4Q.m3u8/ZPRMFBN8p4Q.m3u8"}, "slug": "lesson-2-rhythm-dotted-notes-ties-and-rests", "video_id": "ZPRMFBN8p4Q", "youtube_id": "ZPRMFBN8p4Q", "readable_id": "lesson-2-rhythm-dotted-notes-ties-and-rests"}, "AQr0rNyUnFM": {"duration": 588, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/neuron-graded-potential-description/", "keywords": "", "id": "AQr0rNyUnFM", "title": "Neuron graded potential description", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AQr0rNyUnFM.mp4/AQr0rNyUnFM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AQr0rNyUnFM.mp4/AQr0rNyUnFM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AQr0rNyUnFM.m3u8/AQr0rNyUnFM.m3u8"}, "slug": "neuron-graded-potential-description", "video_id": "AQr0rNyUnFM", "youtube_id": "AQr0rNyUnFM", "readable_id": "neuron-graded-potential-description"}, "HPRFmu7JsKU": {"duration": 890, "path": "khan/math/algebra2/conics_precalc/hyperbolas-precalc/proof-hyperbola-foci/", "keywords": "hyperbola, foci, focuses, conic", "id": "HPRFmu7JsKU", "title": "Proof: Hyperbola foci", "description": "Proof of the hyperbola foci formula", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HPRFmu7JsKU.mp4/HPRFmu7JsKU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HPRFmu7JsKU.mp4/HPRFmu7JsKU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HPRFmu7JsKU.m3u8/HPRFmu7JsKU.m3u8"}, "slug": "proof-hyperbola-foci", "video_id": "HPRFmu7JsKU", "youtube_id": "HPRFmu7JsKU", "readable_id": "proof-hyperbola-foci"}, "-0qEDcZZS9E": {"duration": 381, "path": "khan/math/precalculus/vectors-precalc/rect-form/vector-components-from-initial-and-terminal-points/", "keywords": "", "id": "-0qEDcZZS9E", "title": "Vector components from initial and terminal points", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-0qEDcZZS9E.mp4/-0qEDcZZS9E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-0qEDcZZS9E.mp4/-0qEDcZZS9E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-0qEDcZZS9E.m3u8/-0qEDcZZS9E.m3u8"}, "slug": "vector-components-from-initial-and-terminal-points", "video_id": "-0qEDcZZS9E", "youtube_id": "-0qEDcZZS9E", "readable_id": "vector-components-from-initial-and-terminal-points"}, "yIQUhXa-n-M": {"duration": 296, "path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/derivative-inverse-sine/", "keywords": "", "id": "yIQUhXa-n-M", "title": "Derivative of inverse sine", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yIQUhXa-n-M.mp4/yIQUhXa-n-M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yIQUhXa-n-M.mp4/yIQUhXa-n-M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yIQUhXa-n-M.m3u8/yIQUhXa-n-M.m3u8"}, "slug": "derivative-inverse-sine", "video_id": "yIQUhXa-n-M", "youtube_id": "yIQUhXa-n-M", "readable_id": "derivative-inverse-sine"}, "9T6ZPYYu_Dk": {"duration": 588, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/return-on-capital/", "keywords": "finance, ROC, ROIC", "id": "9T6ZPYYu_Dk", "title": "Return on capital", "description": "Introduction to return on capital and cost of capital. Using these concepts to decide where to invest.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9T6ZPYYu_Dk.mp4/9T6ZPYYu_Dk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9T6ZPYYu_Dk.mp4/9T6ZPYYu_Dk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9T6ZPYYu_Dk.m3u8/9T6ZPYYu_Dk.m3u8"}, "slug": "return-on-capital", "video_id": "9T6ZPYYu_Dk", "youtube_id": "9T6ZPYYu_Dk", "readable_id": "return-on-capital"}, "FSpSrZQzzVs": {"duration": 269, "path": "khan/math/pre-algebra/decimals-pre-alg/dec-perc-frac-pre-alg/adding-and-subtracting-a-decimal-percentage-and-fraction/", "keywords": "", "id": "FSpSrZQzzVs", "title": "Adding, subtracting numbers in different formats", "description": "In this example, we solve an addition problem with numbers in different formats: a percentage, decimal, and mixed number. First, we'll get them all in the same format...which makes it a while easier to solve!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FSpSrZQzzVs.mp4/FSpSrZQzzVs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FSpSrZQzzVs.mp4/FSpSrZQzzVs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FSpSrZQzzVs.m3u8/FSpSrZQzzVs.m3u8"}, "slug": "adding-and-subtracting-a-decimal-percentage-and-fraction", "video_id": "FSpSrZQzzVs", "youtube_id": "FSpSrZQzzVs", "readable_id": "adding-and-subtracting-a-decimal-percentage-and-fraction"}, "sdM6aGhKdTI": {"duration": 398, "path": "khan/humanities/global-culture/conceptual-performance/institutional-critique-hans-haacke-s-seurat-s-les-poseuses-small-version-1884-1975-1975/", "keywords": "", "id": "sdM6aGhKdTI", "title": "Hans Haacke, Seurat's 'Les Poseuses' (small version)", "description": "Beth Harris, Sal Khan and Steven Zucker discuss art and institutional critique in relation to Hans Haacke's Seurat's 'Les Poseuses' (small version), 1884-1975 from 1975.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sdM6aGhKdTI.mp4/sdM6aGhKdTI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sdM6aGhKdTI.mp4/sdM6aGhKdTI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sdM6aGhKdTI.m3u8/sdM6aGhKdTI.m3u8"}, "slug": "institutional-critique-hans-haacke-s-seurat-s-les-poseuses-small-version-1884-1975-1975", "video_id": "sdM6aGhKdTI", "youtube_id": "sdM6aGhKdTI", "readable_id": "institutional-critique-hans-haacke-s-seurat-s-les-poseuses-small-version-1884-1975-1975"}, "rcRg_gO7-7E": {"duration": 173, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/series-as-sum-of-sequence/", "keywords": "", "id": "rcRg_gO7-7E", "title": "Series as sum of sequence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rcRg_gO7-7E.mp4/rcRg_gO7-7E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rcRg_gO7-7E.mp4/rcRg_gO7-7E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rcRg_gO7-7E.m3u8/rcRg_gO7-7E.m3u8"}, "slug": "series-as-sum-of-sequence", "video_id": "rcRg_gO7-7E", "youtube_id": "rcRg_gO7-7E", "readable_id": "series-as-sum-of-sequence"}, "EKvHQc3QEow": {"duration": 547, "path": "khan/math/differential-calculus/taking-derivatives/intro_differential_calc/newton-leibniz-and-usain-bolt/", "keywords": "math, calculus, marquee", "id": "EKvHQc3QEow", "title": "Newton, Leibniz, and Usain Bolt", "description": "Why we study differential calculus", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EKvHQc3QEow.mp4/EKvHQc3QEow.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EKvHQc3QEow.mp4/EKvHQc3QEow.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EKvHQc3QEow.m3u8/EKvHQc3QEow.m3u8"}, "slug": "newton-leibniz-and-usain-bolt", "video_id": "EKvHQc3QEow", "youtube_id": "EKvHQc3QEow", "readable_id": "newton-leibniz-and-usain-bolt"}, "Gv_1viYhEoU": {"duration": 269, "path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/hypnosis-and-meditation/", "keywords": "", "id": "Gv_1viYhEoU", "title": "Hypnosis and meditation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Gv_1viYhEoU.mp4/Gv_1viYhEoU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Gv_1viYhEoU.mp4/Gv_1viYhEoU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Gv_1viYhEoU.m3u8/Gv_1viYhEoU.m3u8"}, "slug": "hypnosis-and-meditation", "video_id": "Gv_1viYhEoU", "youtube_id": "Gv_1viYhEoU", "readable_id": "hypnosis-and-meditation"}, "k2fdtepbkz8": {"duration": 403, "path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/exekias-attic-black-figure-amphora-with-ajax-and-achilles-playing-a-game/", "keywords": "", "id": "k2fdtepbkz8", "title": "Attic Black-Figure: Exekias, amphora with Ajax and Achilles playing a game", "description": "A conversation between Dr. Beth Harris and Dr. Steven Zucker in front of an Attic black figure amphora by Exekias (potter and painter), archaic period, c. 540-530 B.C.E., 61.1 cm high, found Vulci (Gregorian Etruscan Museum, Vatican)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/k2fdtepbkz8.mp4/k2fdtepbkz8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/k2fdtepbkz8.mp4/k2fdtepbkz8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/k2fdtepbkz8.m3u8/k2fdtepbkz8.m3u8"}, "slug": "exekias-attic-black-figure-amphora-with-ajax-and-achilles-playing-a-game", "video_id": "k2fdtepbkz8", "youtube_id": "k2fdtepbkz8", "readable_id": "exekias-attic-black-figure-amphora-with-ajax-and-achilles-playing-a-game"}, "i-NNWI8Ccas": {"duration": 478, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/birth-of-stars/", "keywords": "Birth, of, Stars, stellar, evoluation", "id": "i-NNWI8Ccas", "title": "Birth of stars", "description": "Birth of Stars", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i-NNWI8Ccas.mp4/i-NNWI8Ccas.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i-NNWI8Ccas.mp4/i-NNWI8Ccas.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i-NNWI8Ccas.m3u8/i-NNWI8Ccas.m3u8"}, "slug": "birth-of-stars", "video_id": "i-NNWI8Ccas", "youtube_id": "i-NNWI8Ccas", "readable_id": "birth-of-stars"}, "bEm2olQ3iJA": {"duration": 71, "path": "khan/college-admissions/applying-to-college/admissions-interviews/ss-admissions-interview/", "keywords": "", "id": "bEm2olQ3iJA", "title": "Student story: Admissions interview", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bEm2olQ3iJA.mp4/bEm2olQ3iJA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bEm2olQ3iJA.mp4/bEm2olQ3iJA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bEm2olQ3iJA.m3u8/bEm2olQ3iJA.m3u8"}, "slug": "ss-admissions-interview", "video_id": "bEm2olQ3iJA", "youtube_id": "bEm2olQ3iJA", "readable_id": "ss-admissions-interview"}, "xks4cETlN58": {"duration": 314, "path": "khan/math/differential-calculus/limits_topic/limits-infinity/limits-with-two-horizontal-asymptotes/", "keywords": "", "id": "xks4cETlN58", "title": "Limits with two horizontal asymptotes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xks4cETlN58.mp4/xks4cETlN58.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xks4cETlN58.mp4/xks4cETlN58.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xks4cETlN58.m3u8/xks4cETlN58.m3u8"}, "slug": "limits-with-two-horizontal-asymptotes", "video_id": "xks4cETlN58", "youtube_id": "xks4cETlN58", "readable_id": "limits-with-two-horizontal-asymptotes"}, "ALLSsIDhFdU": {"duration": 557, "path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/signal-characteristics-shape/", "keywords": "", "id": "ALLSsIDhFdU", "title": "Signal characteristics - shape", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ALLSsIDhFdU.mp4/ALLSsIDhFdU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ALLSsIDhFdU.mp4/ALLSsIDhFdU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ALLSsIDhFdU.m3u8/ALLSsIDhFdU.m3u8"}, "slug": "signal-characteristics-shape", "video_id": "ALLSsIDhFdU", "youtube_id": "ALLSsIDhFdU", "readable_id": "signal-characteristics-shape"}, "KdDIIYqXmjw": {"duration": 375, "path": "khan/humanities/renaissance-reformation/northern/england-france-tyrol/pacher-st-wolfgang-altarpiece-c-1479-8/", "keywords": "", "id": "KdDIIYqXmjw", "title": "Pacher, St. Wolfgang Altarpiece", "description": "Michael Pacher, St. Wolfgang Altarpiece, c. 1479-81 (Church of St. Wolfgang, St. Wolfgang, Austria) Speakers: Dr. Steven Zucker & Dr. Beth Harris. Find related images here.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KdDIIYqXmjw.mp4/KdDIIYqXmjw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KdDIIYqXmjw.mp4/KdDIIYqXmjw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KdDIIYqXmjw.m3u8/KdDIIYqXmjw.m3u8"}, "slug": "pacher-st-wolfgang-altarpiece-c-1479-8", "video_id": "KdDIIYqXmjw", "youtube_id": "KdDIIYqXmjw", "readable_id": "pacher-st-wolfgang-altarpiece-c-1479-8"}, "Q0meIMQJ73I": {"duration": 334, "path": "khan/test-prep/nclex-rn/rn-mental-health/anxiety-rn/post-traumatic-stress-disorder/", "keywords": "Mental Illness (Disease Or Medical Condition),Stress (Quotation Subject),Posttraumatic Stress Disorder (Disease Or Medical Condition),Health (Industry)", "id": "Q0meIMQJ73I", "title": "Post traumatic stress disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q0meIMQJ73I.mp4/Q0meIMQJ73I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q0meIMQJ73I.mp4/Q0meIMQJ73I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q0meIMQJ73I.m3u8/Q0meIMQJ73I.m3u8"}, "slug": "post-traumatic-stress-disorder", "video_id": "Q0meIMQJ73I", "youtube_id": "Q0meIMQJ73I", "readable_id": "post-traumatic-stress-disorder"}, "8QihetGj3pg": {"duration": 432, "path": "khan/math/linear-algebra/vectors_and_spaces/vectors/adding-vectors/", "keywords": "", "id": "8QihetGj3pg", "title": "Adding vectors", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8QihetGj3pg.mp4/8QihetGj3pg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8QihetGj3pg.mp4/8QihetGj3pg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8QihetGj3pg.m3u8/8QihetGj3pg.m3u8"}, "slug": "adding-vectors", "video_id": "8QihetGj3pg", "youtube_id": "8QihetGj3pg", "readable_id": "adding-vectors"}, "INmIcOPKo_M": {"duration": 394, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/malaria-rn/preventing-malaria/", "keywords": "Malaria (Disease Or Medical Condition),Health (Industry)", "id": "INmIcOPKo_M", "title": "Preventing malaria", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/INmIcOPKo_M.mp4/INmIcOPKo_M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/INmIcOPKo_M.mp4/INmIcOPKo_M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/INmIcOPKo_M.m3u8/INmIcOPKo_M.m3u8"}, "slug": "preventing-malaria", "video_id": "INmIcOPKo_M", "youtube_id": "INmIcOPKo_M", "readable_id": "preventing-malaria"}, "z_guKLKwjgY": {"duration": 455, "path": "khan/humanities/becoming-modern/early-photography/emerson-naturalistic-photography/", "keywords": "", "id": "z_guKLKwjgY", "title": "P.H. Emerson's naturalistic photography", "description": "P.H. Emerson (1856-1936) believed that \"nothing in nature has a hard outline\" and attempted to emulate natural eyesight wherein the subject is sharp and everything else gradually falls out of focus. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z_guKLKwjgY.mp4/z_guKLKwjgY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z_guKLKwjgY.mp4/z_guKLKwjgY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z_guKLKwjgY.m3u8/z_guKLKwjgY.m3u8"}, "slug": "emerson-naturalistic-photography", "video_id": "z_guKLKwjgY", "youtube_id": "z_guKLKwjgY", "readable_id": "emerson-naturalistic-photography"}, "126N4hox9YA": {"duration": 699, "path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/electronegativity-and-chemical-bonds/", "keywords": "", "id": "126N4hox9YA", "title": "Electronegativity and bonding", "description": "Electronegativity differences in bonding using Pauling scale. Using differences in electronegativity to classify bonds as covalent, polar covalent, or ionic.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/126N4hox9YA.mp4/126N4hox9YA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/126N4hox9YA.mp4/126N4hox9YA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/126N4hox9YA.m3u8/126N4hox9YA.m3u8"}, "slug": "electronegativity-and-chemical-bonds", "video_id": "126N4hox9YA", "youtube_id": "126N4hox9YA", "readable_id": "electronegativity-and-chemical-bonds"}, "79duxPXpyKQ": {"duration": 653, "path": "khan/math/probability/statistics-inferential/normal_distribution/ck12-org-normal-distribution-problems-qualitative-sense-of-normal-distributions/", "keywords": "normal, distribution, CC_6_SP_5_c, CC_6_SP_5_d, CC_7_SP_2", "id": "79duxPXpyKQ", "title": "ck12.org normal distribution problems: Qualitative sense of normal distributions", "description": "Discussion of how \"normal\" a distribution might be", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/79duxPXpyKQ.mp4/79duxPXpyKQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/79duxPXpyKQ.mp4/79duxPXpyKQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/79duxPXpyKQ.m3u8/79duxPXpyKQ.m3u8"}, "slug": "ck12-org-normal-distribution-problems-qualitative-sense-of-normal-distributions", "video_id": "79duxPXpyKQ", "youtube_id": "79duxPXpyKQ", "readable_id": "ck12-org-normal-distribution-problems-qualitative-sense-of-normal-distributions"}, "Ye13MIPv6n0": {"duration": 194, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/why-of-algebra/intuition-why-we-divide-both-sides/", "keywords": "algebra, equations", "id": "Ye13MIPv6n0", "title": "How to divide from both sides of an equation", "description": "Let's get a conceptual understanding of why one needs to divide both sides of an equation to solve for a variable.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ye13MIPv6n0.mp4/Ye13MIPv6n0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ye13MIPv6n0.mp4/Ye13MIPv6n0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ye13MIPv6n0.m3u8/Ye13MIPv6n0.m3u8"}, "slug": "intuition-why-we-divide-both-sides", "video_id": "Ye13MIPv6n0", "youtube_id": "Ye13MIPv6n0", "readable_id": "intuition-why-we-divide-both-sides"}, "aubZU0iWtgI": {"duration": 1139, "path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/diffusion-and-osmosis/", "keywords": "diffusion, osmosis, hypertonic, hypotonic, solute, solvent, solution", "id": "aubZU0iWtgI", "title": "Diffusion and osmosis", "description": "Learn about diffusion, osmosis, and concentration gradients and why these are important to cells.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aubZU0iWtgI.mp4/aubZU0iWtgI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aubZU0iWtgI.mp4/aubZU0iWtgI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aubZU0iWtgI.m3u8/aubZU0iWtgI.m3u8"}, "slug": "diffusion-and-osmosis", "video_id": "aubZU0iWtgI", "youtube_id": "aubZU0iWtgI", "readable_id": "diffusion-and-osmosis"}, "bYyxwxEqTQo": {"duration": 211, "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-bacchus-and-ariadne-1523-24/", "keywords": "Titian, Bacchus and Ariadne, Bacchus, Smarthistory, Venetian Art Art history, Italian art, Renaissance", "id": "bYyxwxEqTQo", "title": "Titian, Bacchus and Ariadne", "description": "Titian, Bacchus and Ariadne, 1523-24, oil on canvas now atop board, 69-1/2 x 75 inches (National Gallery, London). Speakers: Dr. Beth Harris and Dr. Steven Zucker\u00a0\n\nPart of a mythological cycle painted by Titian and Giovanni Bellini and commissioned by Alfonso d'Este, Duke of Ferrara that includes The Feast of the Gods and the Andrians. Originally hung in the studiolo or Camerini d'Alabastro of the Duke's Ferranese castle.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bYyxwxEqTQo.mp4/bYyxwxEqTQo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bYyxwxEqTQo.mp4/bYyxwxEqTQo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bYyxwxEqTQo.m3u8/bYyxwxEqTQo.m3u8"}, "slug": "titian-bacchus-and-ariadne-1523-24", "video_id": "bYyxwxEqTQo", "youtube_id": "bYyxwxEqTQo", "readable_id": "titian-bacchus-and-ariadne-1523-24"}, "ayRpoJgph0E": {"duration": 156, "path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-number-patterns/relationships-between-patterns/", "keywords": "", "id": "ayRpoJgph0E", "title": "Number patterns: Seeing relationships", "description": "Laying the foundation for algebraic thinking by learning to recognize the relationships between patterns and graphing out those relationships.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ayRpoJgph0E.mp4/ayRpoJgph0E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ayRpoJgph0E.mp4/ayRpoJgph0E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ayRpoJgph0E.m3u8/ayRpoJgph0E.m3u8"}, "slug": "relationships-between-patterns", "video_id": "ayRpoJgph0E", "youtube_id": "ayRpoJgph0E", "readable_id": "relationships-between-patterns"}, "1KL8HAm3uSY": {"duration": 290, "path": "khan/test-prep/mcat/behavior/human-development/implantation/", "keywords": "", "id": "1KL8HAm3uSY", "title": "Implantation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1KL8HAm3uSY.mp4/1KL8HAm3uSY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1KL8HAm3uSY.mp4/1KL8HAm3uSY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1KL8HAm3uSY.m3u8/1KL8HAm3uSY.m3u8"}, "slug": "implantation", "video_id": "1KL8HAm3uSY", "youtube_id": "1KL8HAm3uSY", "readable_id": "implantation"}, "FmjSUyyc-3M": {"duration": 192, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/marcel-duchamp-fountain-1917/", "keywords": "", "id": "FmjSUyyc-3M", "title": "Duchamp, Fountain", "description": "Marcel Duchamp, Fountain, 1917/1964, porcelain urinal, paint, San Francisco Museum of Modern Art. Speakers:\u00a0\u00a0Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FmjSUyyc-3M.mp4/FmjSUyyc-3M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FmjSUyyc-3M.mp4/FmjSUyyc-3M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FmjSUyyc-3M.m3u8/FmjSUyyc-3M.m3u8"}, "slug": "marcel-duchamp-fountain-1917", "video_id": "FmjSUyyc-3M", "youtube_id": "FmjSUyyc-3M", "readable_id": "marcel-duchamp-fountain-1917"}, "nYFuxTXDj90": {"duration": 626, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/beginnings-of-life/", "keywords": "life, photosynthesis, prokaryote, eukaryote, arhchean, hades, hadean, eon", "id": "nYFuxTXDj90", "title": "Beginnings of life", "description": "Life and photosynthesis start to thrive in the Archean Eon", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nYFuxTXDj90.mp4/nYFuxTXDj90.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nYFuxTXDj90.mp4/nYFuxTXDj90.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nYFuxTXDj90.m3u8/nYFuxTXDj90.m3u8"}, "slug": "beginnings-of-life", "video_id": "nYFuxTXDj90", "youtube_id": "nYFuxTXDj90", "readable_id": "beginnings-of-life"}, "WreIjcz4X_k": {"duration": 226, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/zach-kaplan/kauffman-zach-kaplan1/", "keywords": "Zach Kaplan, Kauffman, Inventables", "id": "WreIjcz4X_k", "title": "Zach Kaplan - Digital manufacturing revolution", "description": "Zach Kaplan, CEO of Inventables, discusses how the revolution of digital manufacturing and desktop publishing can impact a new generation of entrepreneurs.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WreIjcz4X_k.mp4/WreIjcz4X_k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WreIjcz4X_k.mp4/WreIjcz4X_k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WreIjcz4X_k.m3u8/WreIjcz4X_k.m3u8"}, "slug": "kauffman-zach-kaplan1", "video_id": "WreIjcz4X_k", "youtube_id": "WreIjcz4X_k", "readable_id": "kauffman-zach-kaplan1"}, "ku4KOFQ-bB4": {"duration": 600, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/number-systems-introduction/", "keywords": "", "id": "ku4KOFQ-bB4", "title": "Introduction to number systems and binary", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ku4KOFQ-bB4.mp4/ku4KOFQ-bB4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ku4KOFQ-bB4.mp4/ku4KOFQ-bB4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ku4KOFQ-bB4.m3u8/ku4KOFQ-bB4.m3u8"}, "slug": "number-systems-introduction", "video_id": "ku4KOFQ-bB4", "youtube_id": "ku4KOFQ-bB4", "readable_id": "number-systems-introduction"}, "s5smas8uum4": {"duration": 704, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/depolarization-waves-flowing-through-the-heart/", "keywords": "", "id": "s5smas8uum4", "title": "Depolarization waves flowing through the heart", "description": "Get a clearer idea of what a \"Depolarization Wave\" means and how it goes from cell to cell through the entire heart! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/s5smas8uum4.mp4/s5smas8uum4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/s5smas8uum4.mp4/s5smas8uum4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/s5smas8uum4.m3u8/s5smas8uum4.m3u8"}, "slug": "depolarization-waves-flowing-through-the-heart", "video_id": "s5smas8uum4", "youtube_id": "s5smas8uum4", "readable_id": "depolarization-waves-flowing-through-the-heart"}, "dX0JyJRTXm4": {"duration": 382, "path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/examples-leveraging-definite-integral/", "keywords": "", "id": "dX0JyJRTXm4", "title": "Examples leveraging integration properties", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dX0JyJRTXm4.mp4/dX0JyJRTXm4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dX0JyJRTXm4.mp4/dX0JyJRTXm4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dX0JyJRTXm4.m3u8/dX0JyJRTXm4.m3u8"}, "slug": "examples-leveraging-definite-integral", "video_id": "dX0JyJRTXm4", "youtube_id": "dX0JyJRTXm4", "readable_id": "examples-leveraging-definite-integral"}, "BgFJD7oCmDE": {"duration": 147, "path": "khan/computing/computer-science/cryptography/crypt/polyalphabetic-cipher/", "keywords": "cryptography, polyalphabetic, cipher", "id": "BgFJD7oCmDE", "title": "Polyalphabetic cipher", "description": "Brit introduces the polyalphabetic cipher, which creates a lighter fingerprint than the Caesar cipher.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BgFJD7oCmDE.mp4/BgFJD7oCmDE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BgFJD7oCmDE.mp4/BgFJD7oCmDE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BgFJD7oCmDE.m3u8/BgFJD7oCmDE.m3u8"}, "slug": "polyalphabetic-cipher", "video_id": "BgFJD7oCmDE", "youtube_id": "BgFJD7oCmDE", "readable_id": "polyalphabetic-cipher"}, "7PgYb0c_3KE": {"duration": 222, "path": "khan/science/discoveries-projects/robots/spider_bot/2-hacking-spiders-click-n-stick/", "keywords": "hack, tap light, click n' stick, spider, diy, make, hack, robot, small, inexpensive", "id": "7PgYb0c_3KE", "title": "Spider's click n' stick", "description": "In this video we show you how to hack a click n' stick tap light to make a body for Spider", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7PgYb0c_3KE.mp4/7PgYb0c_3KE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7PgYb0c_3KE.mp4/7PgYb0c_3KE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7PgYb0c_3KE.m3u8/7PgYb0c_3KE.m3u8"}, "slug": "2-hacking-spiders-click-n-stick", "video_id": "7PgYb0c_3KE", "youtube_id": "7PgYb0c_3KE", "readable_id": "2-hacking-spiders-click-n-stick"}, "7jzCJJIc59E": {"duration": 406, "path": "khan/computing/computer-science/cryptography/comp-number-theory/prime-number-theorem-the-density-of-primes/", "keywords": "prime number, prime number theorem, prime density, natural logarithm", "id": "7jzCJJIc59E", "title": "The prime number theorem", "description": "How can we estimate the number of primes up to x?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7jzCJJIc59E.mp4/7jzCJJIc59E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7jzCJJIc59E.mp4/7jzCJJIc59E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7jzCJJIc59E.m3u8/7jzCJJIc59E.m3u8"}, "slug": "prime-number-theorem-the-density-of-primes", "video_id": "7jzCJJIc59E", "youtube_id": "7jzCJJIc59E", "readable_id": "prime-number-theorem-the-density-of-primes"}, "5ui43_O0RVQ": {"duration": 862, "path": "khan/science/health-and-medicine/infectious-diseases/influenza/flu-surveillance/", "keywords": "", "id": "5ui43_O0RVQ", "title": "Flu surveillance", "description": "Find out how many people get hospitalized and die from the flu each year, and learn how we can use the internet to keep tabs on the flu! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5ui43_O0RVQ.mp4/5ui43_O0RVQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5ui43_O0RVQ.mp4/5ui43_O0RVQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5ui43_O0RVQ.m3u8/5ui43_O0RVQ.m3u8"}, "slug": "flu-surveillance", "video_id": "5ui43_O0RVQ", "youtube_id": "5ui43_O0RVQ", "readable_id": "flu-surveillance"}, "5ZdxnFspyP8": {"duration": 127, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/subtracting-polynomials/", "keywords": "u11_l2_t2_we3, Subtracting, Polynomials", "id": "5ZdxnFspyP8", "title": "How to subtract one polynomial from another (example)", "description": "Sal simplifies (16x+14) - (3x^2 + x - 9).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5ZdxnFspyP8.mp4/5ZdxnFspyP8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5ZdxnFspyP8.mp4/5ZdxnFspyP8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5ZdxnFspyP8.m3u8/5ZdxnFspyP8.m3u8"}, "slug": "subtracting-polynomials", "video_id": "5ZdxnFspyP8", "youtube_id": "5ZdxnFspyP8", "readable_id": "subtracting-polynomials"}, "RBbJKOOZ6FY": {"duration": 592, "path": "khan/test-prep/mcat/chemical-processes/stereochemistry/structural-constitutional-isomers-new/", "keywords": "", "id": "RBbJKOOZ6FY", "title": "Structural (constitutional) isomers", "description": "How to draw structural isomers using bond-line structures", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RBbJKOOZ6FY.mp4/RBbJKOOZ6FY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RBbJKOOZ6FY.mp4/RBbJKOOZ6FY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RBbJKOOZ6FY.m3u8/RBbJKOOZ6FY.m3u8"}, "slug": "structural-constitutional-isomers-new", "video_id": "RBbJKOOZ6FY", "youtube_id": "RBbJKOOZ6FY", "readable_id": "structural-constitutional-isomers-new"}, "e4MSN6IImpI": {"duration": 228, "path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-binary-trees/", "keywords": "math, doodles, mathematics, doodling, school, sierpinski's triangle, cellular automata, binary trees", "id": "e4MSN6IImpI", "title": "Doodling in math: Binary trees", "description": "Thank you to all the people I know whose math classes do not require such pastimes!More videos/info: http://vihart.com/doodlingDoodling Snakes + Graphs: ttp://www.youtube.com/watch?v=heKK95DAKmsDoodling Stars: http://www.youtube.com/watch?v=CfJzrmS9UfYhttp://vihart.com", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e4MSN6IImpI.mp4/e4MSN6IImpI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e4MSN6IImpI.mp4/e4MSN6IImpI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e4MSN6IImpI.m3u8/e4MSN6IImpI.m3u8"}, "slug": "doodling-in-math-class-binary-trees", "video_id": "e4MSN6IImpI", "youtube_id": "e4MSN6IImpI", "readable_id": "doodling-in-math-class-binary-trees"}, "jdytgW5wKa4": {"duration": 611, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-plasma-cell-dyscrasias/what-is-multiple-myeloma/", "keywords": "", "id": "jdytgW5wKa4", "title": "What is multiple myeloma?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jdytgW5wKa4.mp4/jdytgW5wKa4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jdytgW5wKa4.mp4/jdytgW5wKa4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jdytgW5wKa4.m3u8/jdytgW5wKa4.m3u8"}, "slug": "what-is-multiple-myeloma", "video_id": "jdytgW5wKa4", "youtube_id": "jdytgW5wKa4", "readable_id": "what-is-multiple-myeloma"}, "trgXI-RCFJk": {"duration": 529, "path": "khan/test-prep/mcat/biomolecules/dna/how-dna-is-replicated-2/", "keywords": "", "id": "trgXI-RCFJk", "title": "How DNA is replicated 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/trgXI-RCFJk.mp4/trgXI-RCFJk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/trgXI-RCFJk.mp4/trgXI-RCFJk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/trgXI-RCFJk.m3u8/trgXI-RCFJk.m3u8"}, "slug": "how-dna-is-replicated-2", "video_id": "trgXI-RCFJk", "youtube_id": "trgXI-RCFJk", "readable_id": "how-dna-is-replicated-2"}, "pWtt0AvU0KA": {"duration": 840, "path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/proof-of-fundamental-theorem-of-calculus/", "keywords": "", "id": "pWtt0AvU0KA", "title": "Proof of fundamental theorem of calculus", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pWtt0AvU0KA.mp4/pWtt0AvU0KA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pWtt0AvU0KA.mp4/pWtt0AvU0KA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pWtt0AvU0KA.m3u8/pWtt0AvU0KA.m3u8"}, "slug": "proof-of-fundamental-theorem-of-calculus", "video_id": "pWtt0AvU0KA", "youtube_id": "pWtt0AvU0KA", "readable_id": "proof-of-fundamental-theorem-of-calculus"}, "b3xMC6zdrvM": {"duration": 457, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/pacemakers/", "keywords": "", "id": "b3xMC6zdrvM", "title": "Pacemakers", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b3xMC6zdrvM.mp4/b3xMC6zdrvM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b3xMC6zdrvM.mp4/b3xMC6zdrvM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b3xMC6zdrvM.m3u8/b3xMC6zdrvM.m3u8"}, "slug": "pacemakers", "video_id": "b3xMC6zdrvM", "youtube_id": "b3xMC6zdrvM", "readable_id": "pacemakers"}, "esJ5MbAHswc": {"duration": 558, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/functional-groups/identifying-functional-groups/", "keywords": "", "id": "esJ5MbAHswc", "title": "Identifying functional groups", "description": "How to identify functional groups present in organic compounds", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/esJ5MbAHswc.mp4/esJ5MbAHswc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/esJ5MbAHswc.mp4/esJ5MbAHswc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/esJ5MbAHswc.m3u8/esJ5MbAHswc.m3u8"}, "slug": "identifying-functional-groups", "video_id": "esJ5MbAHswc", "youtube_id": "esJ5MbAHswc", "readable_id": "identifying-functional-groups"}, "dnYyMHSSb8M": {"duration": 407, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/half-life-of-radioactive-isotopes/", "keywords": "", "id": "dnYyMHSSb8M", "title": "Half-life plot", "description": "Definition of half-life and graphing the decay of phosphorus-32. Calculating how much phosphorus-32 remains after 57.2 days.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dnYyMHSSb8M.mp4/dnYyMHSSb8M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dnYyMHSSb8M.mp4/dnYyMHSSb8M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dnYyMHSSb8M.m3u8/dnYyMHSSb8M.m3u8"}, "slug": "half-life-of-radioactive-isotopes", "video_id": "dnYyMHSSb8M", "youtube_id": "dnYyMHSSb8M", "readable_id": "half-life-of-radioactive-isotopes"}, "3HvIKsQb6es": {"duration": 722, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/nerve-regulation-of-the-heart/changing-the-heart-rate-chronotropic-effect/", "keywords": "", "id": "3HvIKsQb6es", "title": "Changing the heart rate - chronotropic effect", "description": "Find out exactly how your autonomic nervous system has a chronotropic effect (i.e. timing) that changes speed of your heartbeat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3HvIKsQb6es.mp4/3HvIKsQb6es.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3HvIKsQb6es.mp4/3HvIKsQb6es.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3HvIKsQb6es.m3u8/3HvIKsQb6es.m3u8"}, "slug": "changing-the-heart-rate-chronotropic-effect", "video_id": "3HvIKsQb6es", "youtube_id": "3HvIKsQb6es", "readable_id": "changing-the-heart-rate-chronotropic-effect"}, "EAR9RAMg9NY": {"duration": 308, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/polykleitos-doryphoros-spear-bearer/", "keywords": "art history, smarthistory, khan academy, doryphoros, polykleitos, ancient greek art, classical art, contrapposto, Canon", "id": "EAR9RAMg9NY", "title": "Polykleitos, Doryphoros (Spear Bearer)", "description": "Polykleitos, Doryphoros (Spear-Bearer), Early Classical Period, Roman marble copy after a Greek bronze original from c. 450-440 B.C.E. (Museo Archaeologico Nazionale, Naples). Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EAR9RAMg9NY.mp4/EAR9RAMg9NY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EAR9RAMg9NY.mp4/EAR9RAMg9NY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EAR9RAMg9NY.m3u8/EAR9RAMg9NY.m3u8"}, "slug": "polykleitos-doryphoros-spear-bearer", "video_id": "EAR9RAMg9NY", "youtube_id": "EAR9RAMg9NY", "readable_id": "polykleitos-doryphoros-spear-bearer"}, "pyDPJENZOs0": {"duration": 695, "path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/charlemagne-and-the-carolingian-revival/", "keywords": "charlemagne, Carolingian, medieval", "id": "pyDPJENZOs0", "title": "Charlemagne and the Carolingian revival (2 of 2)", "description": "A brief introduction to Charlemagne's military campaigns and the cultural revival that he supported. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pyDPJENZOs0.mp4/pyDPJENZOs0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pyDPJENZOs0.mp4/pyDPJENZOs0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pyDPJENZOs0.m3u8/pyDPJENZOs0.m3u8"}, "slug": "charlemagne-and-the-carolingian-revival", "video_id": "pyDPJENZOs0", "youtube_id": "pyDPJENZOs0", "readable_id": "charlemagne-and-the-carolingian-revival"}, "pPM72fPwIjw": {"duration": 204, "path": "khan/math/algebra/rational-and-irrational-numbers/rational-and-irrational-expressions/proof-that-sum-of-rational-and-irrational-is-irrational/", "keywords": "", "id": "pPM72fPwIjw", "title": "Proof that sum of rational and irrational is irrational", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pPM72fPwIjw.mp4/pPM72fPwIjw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pPM72fPwIjw.mp4/pPM72fPwIjw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pPM72fPwIjw.m3u8/pPM72fPwIjw.m3u8"}, "slug": "proof-that-sum-of-rational-and-irrational-is-irrational", "video_id": "pPM72fPwIjw", "youtube_id": "pPM72fPwIjw", "readable_id": "proof-that-sum-of-rational-and-irrational-is-irrational"}, "TYXCcTchLnI": {"duration": 280, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/athenian-agora/", "keywords": "athens, classical, democracy, Greece,", "id": "TYXCcTchLnI", "title": "The Athenian Agora and the experiment in democracy", "description": "Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TYXCcTchLnI.mp4/TYXCcTchLnI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TYXCcTchLnI.mp4/TYXCcTchLnI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TYXCcTchLnI.m3u8/TYXCcTchLnI.m3u8"}, "slug": "athenian-agora", "video_id": "TYXCcTchLnI", "youtube_id": "TYXCcTchLnI", "readable_id": "athenian-agora"}, "Iz6IVf8frjw": {"duration": 359, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/logarithm-exponential-deductions/", "keywords": "", "id": "Iz6IVf8frjw", "title": "Deducing with logarithmic and exponential form", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Iz6IVf8frjw.mp4/Iz6IVf8frjw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Iz6IVf8frjw.mp4/Iz6IVf8frjw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Iz6IVf8frjw.m3u8/Iz6IVf8frjw.m3u8"}, "slug": "logarithm-exponential-deductions", "video_id": "Iz6IVf8frjw", "youtube_id": "Iz6IVf8frjw", "readable_id": "logarithm-exponential-deductions"}, "vBlR2xNAGmo": {"duration": 392, "path": "khan/math/geometry/basic-geometry/koch_snowflake/area-of-koch-snowflake-part-2-advanced/", "keywords": "area, infinite, sum, sequence", "id": "vBlR2xNAGmo", "title": "Area of Koch snowflake (part 2) - advanced", "description": "Summing an infinite geometric series to finally find the finite area of a Koch Snowflake", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vBlR2xNAGmo.mp4/vBlR2xNAGmo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vBlR2xNAGmo.mp4/vBlR2xNAGmo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vBlR2xNAGmo.m3u8/vBlR2xNAGmo.m3u8"}, "slug": "area-of-koch-snowflake-part-2-advanced", "video_id": "vBlR2xNAGmo", "youtube_id": "vBlR2xNAGmo", "readable_id": "area-of-koch-snowflake-part-2-advanced"}, "YbNVUhW-HJM": {"duration": 365, "path": "khan/math/geometry/basic-geometry/volume_tutorial/density-example-blimp/", "keywords": "", "id": "YbNVUhW-HJM", "title": "How many people can a blimp carry", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YbNVUhW-HJM.mp4/YbNVUhW-HJM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YbNVUhW-HJM.mp4/YbNVUhW-HJM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YbNVUhW-HJM.m3u8/YbNVUhW-HJM.m3u8"}, "slug": "density-example-blimp", "video_id": "YbNVUhW-HJM", "youtube_id": "YbNVUhW-HJM", "readable_id": "density-example-blimp"}, "zjhepBLtqug": {"duration": 564, "path": "khan/test-prep/mcat/chemical-processes/kinetics/arrhenius-equation/", "keywords": "", "id": "zjhepBLtqug", "title": "Arrhenius equation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zjhepBLtqug.mp4/zjhepBLtqug.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zjhepBLtqug.mp4/zjhepBLtqug.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zjhepBLtqug.m3u8/zjhepBLtqug.m3u8"}, "slug": "arrhenius-equation", "video_id": "zjhepBLtqug", "youtube_id": "zjhepBLtqug", "readable_id": "arrhenius-equation"}, "oYoQpDtBLac": {"duration": 296, "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes/cis-trans-and-e-z-naming-scheme-for-alkenes/", "keywords": "Cis-Trans, and, E-Z, Naming, Scheme, for, Alkenes", "id": "oYoQpDtBLac", "title": "cis-trans and E-Z naming scheme for alkenes", "description": "Cis-Trans and E-Z Naming Scheme for Alkenes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oYoQpDtBLac.mp4/oYoQpDtBLac.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oYoQpDtBLac.mp4/oYoQpDtBLac.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oYoQpDtBLac.m3u8/oYoQpDtBLac.m3u8"}, "slug": "cis-trans-and-e-z-naming-scheme-for-alkenes", "video_id": "oYoQpDtBLac", "youtube_id": "oYoQpDtBLac", "readable_id": "cis-trans-and-e-z-naming-scheme-for-alkenes"}, "d1XTOsnNlgg": {"duration": 530, "path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-introduction/", "keywords": "", "id": "d1XTOsnNlgg", "title": "Titration introduction", "description": "Introduction to acid-base titrations using example of titrating 20.0 mL of HCl of unknown concentration with 0.100 M NaOH. Covers indicators, endpoint, equivalence point, and calculating the unknown concentration.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d1XTOsnNlgg.mp4/d1XTOsnNlgg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d1XTOsnNlgg.mp4/d1XTOsnNlgg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d1XTOsnNlgg.m3u8/d1XTOsnNlgg.m3u8"}, "slug": "titration-introduction", "video_id": "d1XTOsnNlgg", "youtube_id": "d1XTOsnNlgg", "readable_id": "titration-introduction"}, "durV0mnzPo4": {"duration": 344, "path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/treatment-of-dementia-and-alzheimers-disease/", "keywords": "Dementia (Disease Or Medical Condition),Disease (Cause Of Death),Alzheimer's Disease (Disease Or Medical Condition),Health (Industry)", "id": "durV0mnzPo4", "title": "Treatment of dementia and Alzheimer's disease", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/durV0mnzPo4.mp4/durV0mnzPo4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/durV0mnzPo4.mp4/durV0mnzPo4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/durV0mnzPo4.m3u8/durV0mnzPo4.m3u8"}, "slug": "treatment-of-dementia-and-alzheimers-disease", "video_id": "durV0mnzPo4", "youtube_id": "durV0mnzPo4", "readable_id": "treatment-of-dementia-and-alzheimers-disease"}, "pbLiN8D9gAk": {"duration": 121, "path": "khan/math/algebra/linear_inequalities/inequalities/writing-and-using-inequalities-3/", "keywords": "U05_L1_T3_we3, Writing, and, using, inequalities, CC_6_EE_6, CC_6_EE_8, CC_7_EE_4, CC_7_EE_4_b, CC_39336_A-CED_1, CC_39336_A-CED_3, CC_39336_A-REI_3", "id": "pbLiN8D9gAk", "title": "Constructing, solving two-step inequality example", "description": "Let's tackle this word problem together. We'll interpret the information and then construct a linear inequality to solve it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pbLiN8D9gAk.mp4/pbLiN8D9gAk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pbLiN8D9gAk.mp4/pbLiN8D9gAk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pbLiN8D9gAk.m3u8/pbLiN8D9gAk.m3u8"}, "slug": "writing-and-using-inequalities-3", "video_id": "pbLiN8D9gAk", "youtube_id": "pbLiN8D9gAk", "readable_id": "writing-and-using-inequalities-3"}, "NG7nbAcAFNc": {"duration": 681, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/getting-ea-arterial-elastance-from-the-pv-loop/", "keywords": "", "id": "NG7nbAcAFNc", "title": "Getting Ea (arterial elastance) from the PV loop", "description": "Find out how to use the PV loop to draw the Ea (Arterial Elastance) line, and what it represents. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NG7nbAcAFNc.mp4/NG7nbAcAFNc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NG7nbAcAFNc.mp4/NG7nbAcAFNc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NG7nbAcAFNc.m3u8/NG7nbAcAFNc.m3u8"}, "slug": "getting-ea-arterial-elastance-from-the-pv-loop", "video_id": "NG7nbAcAFNc", "youtube_id": "NG7nbAcAFNc", "readable_id": "getting-ea-arterial-elastance-from-the-pv-loop"}, "LeZsfzlbje4": {"duration": 189, "path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-explore-bridge-building/", "keywords": "", "id": "LeZsfzlbje4", "title": "DLab: Bridge building project", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LeZsfzlbje4.mp4/LeZsfzlbje4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LeZsfzlbje4.mp4/LeZsfzlbje4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LeZsfzlbje4.m3u8/LeZsfzlbje4.m3u8"}, "slug": "discovery-lab-explore-bridge-building", "video_id": "LeZsfzlbje4", "youtube_id": "LeZsfzlbje4", "readable_id": "discovery-lab-explore-bridge-building"}, "WffVdYETdng": {"duration": 417, "path": "khan/math/trigonometry/unit-circle-trig-func/trig-unit-circle/matching-ratios-trig-functions/", "keywords": "", "id": "WffVdYETdng", "title": "Matching ratios to trig functions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WffVdYETdng.mp4/WffVdYETdng.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WffVdYETdng.mp4/WffVdYETdng.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WffVdYETdng.m3u8/WffVdYETdng.m3u8"}, "slug": "matching-ratios-trig-functions", "video_id": "WffVdYETdng", "youtube_id": "WffVdYETdng", "readable_id": "matching-ratios-trig-functions"}, "tCV9VyIIaw0": {"duration": 360, "path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/restricting-trig-function-domain/", "keywords": "", "id": "tCV9VyIIaw0", "title": "How to restrict the domain of a trig function to make it invertible (example)", "description": "Sal is given the graph of a trigonometric function, and he discusses ways in which he can change the function to make it invertible.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tCV9VyIIaw0.mp4/tCV9VyIIaw0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tCV9VyIIaw0.mp4/tCV9VyIIaw0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tCV9VyIIaw0.m3u8/tCV9VyIIaw0.m3u8"}, "slug": "restricting-trig-function-domain", "video_id": "tCV9VyIIaw0", "youtube_id": "tCV9VyIIaw0", "readable_id": "restricting-trig-function-domain"}, "pkEiHZAtoro": {"duration": 348, "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/opportunity-cost/", "keywords": "economics, opportunity, marginal, cost, PPF", "id": "pkEiHZAtoro", "title": "Opportunity cost", "description": "Opportunity cost (and marginal cost) based on the PPF", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pkEiHZAtoro.mp4/pkEiHZAtoro.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pkEiHZAtoro.mp4/pkEiHZAtoro.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pkEiHZAtoro.m3u8/pkEiHZAtoro.m3u8"}, "slug": "opportunity-cost", "video_id": "pkEiHZAtoro", "youtube_id": "pkEiHZAtoro", "readable_id": "opportunity-cost"}, "U8GzssRfVMc": {"duration": 168, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-8-9/", "keywords": "", "id": "U8GzssRfVMc", "title": "9 Painting red cubes blue", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U8GzssRfVMc.mp4/U8GzssRfVMc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U8GzssRfVMc.mp4/U8GzssRfVMc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U8GzssRfVMc.m3u8/U8GzssRfVMc.m3u8"}, "slug": "sat-2008-may-8-9", "video_id": "U8GzssRfVMc", "youtube_id": "U8GzssRfVMc", "readable_id": "sat-2008-may-8-9"}, "a8LzhzcEunY": {"duration": 202, "path": "khan/test-prep/mcat/individuals-and-society/social-behavior/similarity/", "keywords": "", "id": "a8LzhzcEunY", "title": "Similarity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a8LzhzcEunY.mp4/a8LzhzcEunY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a8LzhzcEunY.mp4/a8LzhzcEunY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a8LzhzcEunY.m3u8/a8LzhzcEunY.m3u8"}, "slug": "similarity", "video_id": "a8LzhzcEunY", "youtube_id": "a8LzhzcEunY", "readable_id": "similarity"}, "yQsCMnz9wO8": {"duration": 161, "path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/clarification-of-confidence-interval-of-difference-of-means/", "keywords": "Clarification, of, Confidence, Interval, Difference, Means, CC_7_SP_2, CC_7_SP_3, CC_7_SP_4", "id": "yQsCMnz9wO8", "title": "Clarification of confidence interval of difference of means", "description": "Clarification of Confidence Interval of Difference of Means", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yQsCMnz9wO8.mp4/yQsCMnz9wO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yQsCMnz9wO8.mp4/yQsCMnz9wO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yQsCMnz9wO8.m3u8/yQsCMnz9wO8.m3u8"}, "slug": "clarification-of-confidence-interval-of-difference-of-means", "video_id": "yQsCMnz9wO8", "youtube_id": "yQsCMnz9wO8", "readable_id": "clarification-of-confidence-interval-of-difference-of-means"}, "4qbb4f1I67k": {"duration": 601, "path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/intro-to-neurodevelopment-milestones/", "keywords": "Neurodevelopmental Disorder (Disease Or Medical Condition),Health (Industry)", "id": "4qbb4f1I67k", "title": "Intro to neurodevelopment milestones", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4qbb4f1I67k.mp4/4qbb4f1I67k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4qbb4f1I67k.mp4/4qbb4f1I67k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4qbb4f1I67k.m3u8/4qbb4f1I67k.m3u8"}, "slug": "intro-to-neurodevelopment-milestones", "video_id": "4qbb4f1I67k", "youtube_id": "4qbb4f1I67k", "readable_id": "intro-to-neurodevelopment-milestones"}, "LkjyVZMyMaY": {"duration": 197, "path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/room-1780-1810/", "keywords": "Tate, ", "id": "LkjyVZMyMaY", "title": "Room: 1780-1810", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Greg Sullivan explores the period 1780-1810.\n\nLearn more about the art featured in this video:\n- Philip James De Loutherbourg, The Battle of Camperdown, 1799\n-\u00a0Thomas Daniell, Sir Charles Warre Malet, Concluding a Treaty in 1790 in Durbar with the Peshwa of the Maratha Empire,\u00a01805\n-\u00a0Johan Zoffany, Colonel Mordaunt\u2019s Cock Match, 1784\u20136", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LkjyVZMyMaY.mp4/LkjyVZMyMaY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LkjyVZMyMaY.mp4/LkjyVZMyMaY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LkjyVZMyMaY.m3u8/LkjyVZMyMaY.m3u8"}, "slug": "room-1780-1810", "video_id": "LkjyVZMyMaY", "youtube_id": "LkjyVZMyMaY", "readable_id": "room-1780-1810"}, "u5vM4rtUSQg": {"duration": 363, "path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/lindau-gospels-cover/", "keywords": "medieval, book, cover, binding, gems, jewels, Lindau, Morgan, Gospels", "id": "u5vM4rtUSQg", "title": "Lindau Gospels cover", "description": "Jeweled upper cover of the Lindau Gospels, c. 880, Court School of Charles the Bald, 350 x 275 mm, cover may have been made in the Royal Abbey of St. Denis (Morgan Library and Museum, New York)\n\nSpeakers: Dr. Nancy Ross and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u5vM4rtUSQg.mp4/u5vM4rtUSQg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u5vM4rtUSQg.mp4/u5vM4rtUSQg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u5vM4rtUSQg.m3u8/u5vM4rtUSQg.m3u8"}, "slug": "lindau-gospels-cover", "video_id": "u5vM4rtUSQg", "youtube_id": "u5vM4rtUSQg", "readable_id": "lindau-gospels-cover"}, "lfRt0Y7e5Ow": {"duration": 558, "path": "khan/humanities/art-history-basics/art-1010/baroque-rococo-introduction/", "keywords": "Baroque, Rococo, art, Romanticism, Realism, Impressionism", "id": "lfRt0Y7e5Ow", "title": "Baroque and Rococo", "description": "A video from the Utah System of Higher Education (with special thanks to Dr. Nancy Ross)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lfRt0Y7e5Ow.mp4/lfRt0Y7e5Ow.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lfRt0Y7e5Ow.mp4/lfRt0Y7e5Ow.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lfRt0Y7e5Ow.m3u8/lfRt0Y7e5Ow.m3u8"}, "slug": "baroque-rococo-introduction", "video_id": "lfRt0Y7e5Ow", "youtube_id": "lfRt0Y7e5Ow", "readable_id": "baroque-rococo-introduction"}, "PEMkfgrifDw": {"duration": 617, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/market-equilibrium-tutorial/market-equilibrium/", "keywords": "supply, demand, economics", "id": "PEMkfgrifDw", "title": "Market equilibrium", "description": "Equilibrium price and quantity for supply and demand", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PEMkfgrifDw.mp4/PEMkfgrifDw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PEMkfgrifDw.mp4/PEMkfgrifDw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PEMkfgrifDw.m3u8/PEMkfgrifDw.m3u8"}, "slug": "market-equilibrium", "video_id": "PEMkfgrifDw", "youtube_id": "PEMkfgrifDw", "readable_id": "market-equilibrium"}, "mqsIJucBn6c": {"duration": 148, "path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns/sequence-relationship-example/", "keywords": "", "id": "mqsIJucBn6c", "title": "Number patterns: visualizing sequence relationships", "description": "Now we're visually plotting ordered pairs based on sequence relationships. The sequence is based on given rules. You're good at following rules, right? Of course you are!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mqsIJucBn6c.mp4/mqsIJucBn6c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mqsIJucBn6c.mp4/mqsIJucBn6c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mqsIJucBn6c.m3u8/mqsIJucBn6c.m3u8"}, "slug": "sequence-relationship-example", "video_id": "mqsIJucBn6c", "youtube_id": "mqsIJucBn6c", "readable_id": "sequence-relationship-example"}, "GEId0GonOZM": {"duration": 120, "path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/deductive-reasoning-1/", "keywords": "U12_L1_T4_we1, Deductive, Reasoning, CC_6_EE_9", "id": "GEId0GonOZM", "title": "Difference between inductive and deductive reasoning", "description": "Deductive Reasoning 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GEId0GonOZM.mp4/GEId0GonOZM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GEId0GonOZM.mp4/GEId0GonOZM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GEId0GonOZM.m3u8/GEId0GonOZM.m3u8"}, "slug": "deductive-reasoning-1", "video_id": "GEId0GonOZM", "youtube_id": "GEId0GonOZM", "readable_id": "deductive-reasoning-1"}, "rfZokAnD7QM": {"duration": 156, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-skip-counting/counting-by-tens-examples/", "keywords": "", "id": "rfZokAnD7QM", "title": "Counting by tens examples", "description": "Learn to count by tens.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rfZokAnD7QM.mp4/rfZokAnD7QM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rfZokAnD7QM.mp4/rfZokAnD7QM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rfZokAnD7QM.m3u8/rfZokAnD7QM.m3u8"}, "slug": "counting-by-tens-examples", "video_id": "rfZokAnD7QM", "youtube_id": "rfZokAnD7QM", "readable_id": "counting-by-tens-examples"}, "Loy1zLkbuF0": {"duration": 358, "path": "khan/test-prep/mcat/behavior/social-psychology/conformity-and-obedience/", "keywords": "", "id": "Loy1zLkbuF0", "title": "Conformity and obedience", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Loy1zLkbuF0.mp4/Loy1zLkbuF0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Loy1zLkbuF0.mp4/Loy1zLkbuF0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Loy1zLkbuF0.m3u8/Loy1zLkbuF0.m3u8"}, "slug": "conformity-and-obedience", "video_id": "Loy1zLkbuF0", "youtube_id": "Loy1zLkbuF0", "readable_id": "conformity-and-obedience"}, "iulx0z1lz8M": {"duration": 334, "path": "khan/math/algebra/quadratics/quadratic-formula/quadratic-formula-1/", "keywords": "U10_L1_T3_we1, Quadratic, Formula, CC_39336_A-REI_4", "id": "iulx0z1lz8M", "title": "Example 1: Using the quadratic formula", "description": "Quadratic Formula 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iulx0z1lz8M.mp4/iulx0z1lz8M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iulx0z1lz8M.mp4/iulx0z1lz8M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iulx0z1lz8M.m3u8/iulx0z1lz8M.m3u8"}, "slug": "quadratic-formula-1", "video_id": "iulx0z1lz8M", "youtube_id": "iulx0z1lz8M", "readable_id": "quadratic-formula-1"}, "uk7gS3cZVp4": {"duration": 181, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/slope-intercept-form/graphing-a-line-in-slope-intercept-form/", "keywords": "U04_L1_T3_we1, Graphing, line, in, slope, intercept, form, CC_8_EE_6, CC_8_F_3, CC_8_F_5, CC_39336_F-IF_4, CC_39336_F-IF_7, CC_39336_F-IF_7_a", "id": "uk7gS3cZVp4", "title": "Graph from slope-intercept equation example", "description": "Graphing a line in slope intercept form", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uk7gS3cZVp4.mp4/uk7gS3cZVp4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uk7gS3cZVp4.mp4/uk7gS3cZVp4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uk7gS3cZVp4.m3u8/uk7gS3cZVp4.m3u8"}, "slug": "graphing-a-line-in-slope-intercept-form", "video_id": "uk7gS3cZVp4", "youtube_id": "uk7gS3cZVp4", "readable_id": "graphing-a-line-in-slope-intercept-form"}, "T6G0ewxKkCQ": {"duration": 121, "path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/moma-brancusi-pogany/", "keywords": "", "id": "T6G0ewxKkCQ", "title": "Constantin Brancusi, \"Mlle Pogany\"", "description": "To learn more about how abstract artists became the radical thinkers of their time, take our online course, Modern Art, 1880-1945.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T6G0ewxKkCQ.mp4/T6G0ewxKkCQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T6G0ewxKkCQ.mp4/T6G0ewxKkCQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T6G0ewxKkCQ.m3u8/T6G0ewxKkCQ.m3u8"}, "slug": "moma-brancusi-pogany", "video_id": "T6G0ewxKkCQ", "youtube_id": "T6G0ewxKkCQ", "readable_id": "moma-brancusi-pogany"}, "j3OqfduWdhc": {"duration": 161, "path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/motion/", "keywords": "control, metal, motion, nature, sculpture, simplicity, North America", "id": "j3OqfduWdhc", "title": "Calder, Mobile", "description": "Met curator Marla Prather on motion in Alexander Calder\u2019s Mobile, 1941.\n\nAlexander Calder was born to a family of sculptors. His grandfather, Alexander Milne Calder (1846-1923), studied with Thomas Eakins and is famous for the elaborate sculptural decorations of Philadelphia's City Hall. Calder himself had studied to be an engineer at the Stevens Institute of Technology before attending the Art Students League in New York. Like many aspiring artists of his generation, Calder then spent time in Paris where he was inspired by Joan Mir\u00f3's work and absorbed the playfulness of Dada. Indeed, it was the French artist Marcel Duchamp who christened Calder's hanging sculptures \"mobiles.\" For works such as this one, Calder cut sheet metal into various shapes and assembled these elements in a chain-linked system so that the flat metal pieces move in response to currents of air.\n\nThis particular mobile was included in the 1942 exhibition \"Artists for Victory\" at the Metropolitan where the sculpture committee awarded it a prize and recommended it be added to the collection.\n\nView this work on\u00a0metmuseum.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j3OqfduWdhc.mp4/j3OqfduWdhc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j3OqfduWdhc.mp4/j3OqfduWdhc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j3OqfduWdhc.m3u8/j3OqfduWdhc.m3u8"}, "slug": "motion", "video_id": "j3OqfduWdhc", "youtube_id": "j3OqfduWdhc", "readable_id": "motion"}, "fyJkXBvcA2Q": {"duration": 585, "path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/laplace-transform-6/", "keywords": "laplace, transform", "id": "fyJkXBvcA2Q", "title": "Laplace transform of cos t and polynomials", "description": "Laplace transform of cosine and polynomials!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fyJkXBvcA2Q.mp4/fyJkXBvcA2Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fyJkXBvcA2Q.mp4/fyJkXBvcA2Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fyJkXBvcA2Q.m3u8/fyJkXBvcA2Q.m3u8"}, "slug": "laplace-transform-6", "video_id": "fyJkXBvcA2Q", "youtube_id": "fyJkXBvcA2Q", "readable_id": "laplace-transform-6"}, "C89z5GncK88": {"duration": 241, "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/robert-motherwell-elegy-to-the-spanish-republic-no-57-1957-60/", "keywords": "Motherwell, Elegy, Spanish Civil War, Abstract Expressionism, painting, art, modernism, abstraction", "id": "C89z5GncK88", "title": "Robert Motherwell, Elegy to the Spanish Republic No. 57", "description": "Robert Motherwell, Elegy to the Spanish Republic No. 57, 1957-60, oil on canvas, 84 x 109-1/8 inches (San Francisco Museum of Modern Art)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C89z5GncK88.mp4/C89z5GncK88.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C89z5GncK88.mp4/C89z5GncK88.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C89z5GncK88.m3u8/C89z5GncK88.m3u8"}, "slug": "robert-motherwell-elegy-to-the-spanish-republic-no-57-1957-60", "video_id": "C89z5GncK88", "youtube_id": "C89z5GncK88", "readable_id": "robert-motherwell-elegy-to-the-spanish-republic-no-57-1957-60"}, "zOZiuAOuOkA": {"duration": 207, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/cassatt-the-loge-1882/", "keywords": "Cassatt, Impressionism, Art, Art History, Smarthistory, National Gallery", "id": "zOZiuAOuOkA", "title": "Cassatt, The Loge", "description": "Mary Cassatt, The Loge, oil on canvas, 1882. 31-7/16 x 25-1/8 inches (National Gallery of Art)\n\nSpeakers: Beth Harris and Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zOZiuAOuOkA.mp4/zOZiuAOuOkA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zOZiuAOuOkA.mp4/zOZiuAOuOkA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zOZiuAOuOkA.m3u8/zOZiuAOuOkA.m3u8"}, "slug": "cassatt-the-loge-1882", "video_id": "zOZiuAOuOkA", "youtube_id": "zOZiuAOuOkA", "readable_id": "cassatt-the-loge-1882"}, "VuJEidLhY1E": {"duration": 561, "path": "khan/math/algebra/systems-of-linear-equations/equivalent-systems-of-equations/how-many-bags-of-potato-chips-do-people-eat/", "keywords": "", "id": "VuJEidLhY1E", "title": "How many bags of potato chips do people eat?", "description": "Sal solves another system of equations using elimination.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VuJEidLhY1E.mp4/VuJEidLhY1E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VuJEidLhY1E.mp4/VuJEidLhY1E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VuJEidLhY1E.m3u8/VuJEidLhY1E.m3u8"}, "slug": "how-many-bags-of-potato-chips-do-people-eat", "video_id": "VuJEidLhY1E", "youtube_id": "VuJEidLhY1E", "readable_id": "how-many-bags-of-potato-chips-do-people-eat"}, "0t4MF9ZoppM": {"duration": 891, "path": "khan/humanities/history/1600s-1800s/french-revolution-tutorial/french-revolution-part-2/", "keywords": "pillnitz, champ, mars, french, revolution", "id": "0t4MF9ZoppM", "title": "French Revolution (part 2)", "description": "Royals try to escape. Champ De Mars Massacre. Declaration of Pillnitz. Movement towards becoming a Republic.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0t4MF9ZoppM.mp4/0t4MF9ZoppM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0t4MF9ZoppM.mp4/0t4MF9ZoppM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0t4MF9ZoppM.m3u8/0t4MF9ZoppM.m3u8"}, "slug": "french-revolution-part-2", "video_id": "0t4MF9ZoppM", "youtube_id": "0t4MF9ZoppM", "readable_id": "french-revolution-part-2"}, "1irO3YeZcU4": {"duration": 225, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s4-harder/", "keywords": "", "id": "1irO3YeZcU4", "title": "Angles, arc lengths, and trig functions \u2014 Harder example", "description": "Watch Sal work through a harder Angles, arc lengths, and trig functions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1irO3YeZcU4.mp4/1irO3YeZcU4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1irO3YeZcU4.mp4/1irO3YeZcU4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1irO3YeZcU4.m3u8/1irO3YeZcU4.m3u8"}, "slug": "sat-math-s4-harder", "video_id": "1irO3YeZcU4", "youtube_id": "1irO3YeZcU4", "readable_id": "sat-math-s4-harder"}, "Uwpdiq9mYME": {"duration": 253, "path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/dipylon-vase/", "keywords": "", "id": "Uwpdiq9mYME", "title": "Geometric: Dipylon Amphora", "description": "Dipylon Amphora, c. 755-750 B.C.E., ceramic, 160 cm (National Archaeological Museum, Athens)\u00a0Speakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Uwpdiq9mYME.mp4/Uwpdiq9mYME.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Uwpdiq9mYME.mp4/Uwpdiq9mYME.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Uwpdiq9mYME.m3u8/Uwpdiq9mYME.m3u8"}, "slug": "dipylon-vase", "video_id": "Uwpdiq9mYME", "youtube_id": "Uwpdiq9mYME", "readable_id": "dipylon-vase"}, "SJVhtIGAkKs": {"duration": 668, "path": "khan/math/differential-equations/first-order-differential-equations/eulers-method-tutorial/eulers-method-program-code/", "keywords": "", "id": "SJVhtIGAkKs", "title": "Euler's method program code", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SJVhtIGAkKs.mp4/SJVhtIGAkKs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SJVhtIGAkKs.mp4/SJVhtIGAkKs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SJVhtIGAkKs.m3u8/SJVhtIGAkKs.m3u8"}, "slug": "eulers-method-program-code", "video_id": "SJVhtIGAkKs", "youtube_id": "SJVhtIGAkKs", "readable_id": "eulers-method-program-code"}, "h3iIi56Yae8": {"duration": 727, "path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/alcohol-nomenclature-rules/", "keywords": "", "id": "h3iIi56Yae8", "title": "Alcohol nomenclature", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h3iIi56Yae8.mp4/h3iIi56Yae8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h3iIi56Yae8.mp4/h3iIi56Yae8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h3iIi56Yae8.m3u8/h3iIi56Yae8.m3u8"}, "slug": "alcohol-nomenclature-rules", "video_id": "h3iIi56Yae8", "youtube_id": "h3iIi56Yae8", "readable_id": "alcohol-nomenclature-rules"}, "IW8OnV8J2Qw": {"duration": 438, "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/pacinians-corpuscle-and-merkels-disk/", "keywords": "", "id": "IW8OnV8J2Qw", "title": "Pacinian's Corpuscle and Merkel's Disk", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IW8OnV8J2Qw.mp4/IW8OnV8J2Qw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IW8OnV8J2Qw.mp4/IW8OnV8J2Qw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IW8OnV8J2Qw.m3u8/IW8OnV8J2Qw.m3u8"}, "slug": "pacinians-corpuscle-and-merkels-disk", "video_id": "IW8OnV8J2Qw", "youtube_id": "IW8OnV8J2Qw", "readable_id": "pacinians-corpuscle-and-merkels-disk"}, "a5sFUXkxyGc": {"duration": 753, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/depreciation/", "keywords": "accounting, depreciation, and, amortization, income, statement", "id": "a5sFUXkxyGc", "title": "Depreciation", "description": "Depreciation a capital asset", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a5sFUXkxyGc.mp4/a5sFUXkxyGc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a5sFUXkxyGc.mp4/a5sFUXkxyGc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a5sFUXkxyGc.m3u8/a5sFUXkxyGc.m3u8"}, "slug": "depreciation", "video_id": "a5sFUXkxyGc", "youtube_id": "a5sFUXkxyGc", "readable_id": "depreciation"}, "VmV6RlsUwO8": {"duration": 322, "path": "khan/test-prep/nclex-rn/rn-mental-health/anxiety-rn/panic-disorder/", "keywords": "Panic,Panic Disorder (Disease Or Medical Condition),Mental Illness (Disease Or Medical Condition),Health (Industry)", "id": "VmV6RlsUwO8", "title": "Panic disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VmV6RlsUwO8.mp4/VmV6RlsUwO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VmV6RlsUwO8.mp4/VmV6RlsUwO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VmV6RlsUwO8.m3u8/VmV6RlsUwO8.m3u8"}, "slug": "panic-disorder", "video_id": "VmV6RlsUwO8", "youtube_id": "VmV6RlsUwO8", "readable_id": "panic-disorder"}, "UPgpYH9ZtMA": {"duration": 671, "path": "khan/test-prep/mcat/chemical-processes/carbohydrates-5d/carbohydrates-cyclic-structures-and-anomers/", "keywords": "", "id": "UPgpYH9ZtMA", "title": "Carbohydrates - cyclic structures and anomers", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UPgpYH9ZtMA.mp4/UPgpYH9ZtMA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UPgpYH9ZtMA.mp4/UPgpYH9ZtMA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UPgpYH9ZtMA.m3u8/UPgpYH9ZtMA.m3u8"}, "slug": "carbohydrates-cyclic-structures-and-anomers", "video_id": "UPgpYH9ZtMA", "youtube_id": "UPgpYH9ZtMA", "readable_id": "carbohydrates-cyclic-structures-and-anomers"}, "ZHkO4p8Ec0o": {"duration": 207, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-4-10/", "keywords": "", "id": "ZHkO4p8Ec0o", "title": "10 Trucks in parking lot", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZHkO4p8Ec0o.mp4/ZHkO4p8Ec0o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZHkO4p8Ec0o.mp4/ZHkO4p8Ec0o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZHkO4p8Ec0o.m3u8/ZHkO4p8Ec0o.m3u8"}, "slug": "sat-2008-may-4-10", "video_id": "ZHkO4p8Ec0o", "youtube_id": "ZHkO4p8Ec0o", "readable_id": "sat-2008-may-4-10"}, "qpsaHE_uZic": {"duration": 301, "path": "khan/test-prep/mcat/processing-the-environment/attention-language/selective-attention/", "keywords": "selective attention", "id": "qpsaHE_uZic", "title": "Theories of selective attention", "description": "Learn about the three major theories of selective attention. By Carole Yue.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qpsaHE_uZic.mp4/qpsaHE_uZic.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qpsaHE_uZic.mp4/qpsaHE_uZic.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qpsaHE_uZic.m3u8/qpsaHE_uZic.m3u8"}, "slug": "selective-attention", "video_id": "qpsaHE_uZic", "youtube_id": "qpsaHE_uZic", "readable_id": "selective-attention"}, "rC165FcI4Yg": {"duration": 503, "path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/nitration/", "keywords": "", "id": "rC165FcI4Yg", "title": "Nitration", "description": "Nitration of Benzene to form Nitrobenzene", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rC165FcI4Yg.mp4/rC165FcI4Yg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rC165FcI4Yg.mp4/rC165FcI4Yg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rC165FcI4Yg.m3u8/rC165FcI4Yg.m3u8"}, "slug": "nitration", "video_id": "rC165FcI4Yg", "youtube_id": "rC165FcI4Yg", "readable_id": "nitration"}, "NQFiGK0M69s": {"duration": 686, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/c-section/", "keywords": "", "id": "NQFiGK0M69s", "title": "C-section", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NQFiGK0M69s.mp4/NQFiGK0M69s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NQFiGK0M69s.mp4/NQFiGK0M69s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NQFiGK0M69s.m3u8/NQFiGK0M69s.m3u8"}, "slug": "c-section", "video_id": "NQFiGK0M69s", "youtube_id": "NQFiGK0M69s", "readable_id": "c-section"}, "jHPr-CuvHhs": {"duration": 168, "path": "khan/computing/computer-programming/html-css/intro-to-html/making-webpages-intro/", "keywords": "", "id": "jHPr-CuvHhs", "title": "Welcome to the web!", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jHPr-CuvHhs.mp4/jHPr-CuvHhs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jHPr-CuvHhs.mp4/jHPr-CuvHhs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jHPr-CuvHhs.m3u8/jHPr-CuvHhs.m3u8"}, "slug": "making-webpages-intro", "video_id": "jHPr-CuvHhs", "youtube_id": "jHPr-CuvHhs", "readable_id": "making-webpages-intro"}, "eCJ76hz7jPM": {"duration": 303, "path": "khan/math/pre-algebra/decimals-pre-alg/sig-figs-pre-alg/significant-figures/", "keywords": "significant, figures, digits", "id": "eCJ76hz7jPM", "title": "Significant figures", "description": "Introduction to significant figures", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eCJ76hz7jPM.mp4/eCJ76hz7jPM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eCJ76hz7jPM.mp4/eCJ76hz7jPM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eCJ76hz7jPM.m3u8/eCJ76hz7jPM.m3u8"}, "slug": "significant-figures", "video_id": "eCJ76hz7jPM", "youtube_id": "eCJ76hz7jPM", "readable_id": "significant-figures"}, "Ewif2XGL2a8": {"duration": 531, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/causes-of-myocarditis/", "keywords": "", "id": "Ewif2XGL2a8", "title": "Causes of myocarditis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ewif2XGL2a8.mp4/Ewif2XGL2a8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ewif2XGL2a8.mp4/Ewif2XGL2a8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ewif2XGL2a8.m3u8/Ewif2XGL2a8.m3u8"}, "slug": "causes-of-myocarditis", "video_id": "Ewif2XGL2a8", "youtube_id": "Ewif2XGL2a8", "readable_id": "causes-of-myocarditis"}, "udgNvPpDb2I": {"duration": 318, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/ghent-altarpiece-closed/", "keywords": "", "id": "udgNvPpDb2I", "title": "Van Eyck, Ghent Altarpiece (1 of 2)", "description": "Jan van Eyck, Ghent Altarpiece (closed), completed 1432, oil on wood, 11\u2019 5\u201d x 7\u2019 6\u201d (Saint Bavo Cathedral, Ghent, Belgium).\u00a0Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/udgNvPpDb2I.mp4/udgNvPpDb2I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/udgNvPpDb2I.mp4/udgNvPpDb2I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/udgNvPpDb2I.m3u8/udgNvPpDb2I.m3u8"}, "slug": "ghent-altarpiece-closed", "video_id": "udgNvPpDb2I", "youtube_id": "udgNvPpDb2I", "readable_id": "ghent-altarpiece-closed"}, "U5vAO_f2LDQ": {"duration": 343, "path": "khan/test-prep/mcat/cells/cellular-division/cell-cycle-phases/", "keywords": "Mitosis,Interphase,Cell Division,DNA replication,Cell Cycle,Cell (Anatomical Structure),G1,G2,G0", "id": "U5vAO_f2LDQ", "title": "Cell cycle phases", "description": "Learn about the different \"seasons\" of a cell's life and how it grows with time. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U5vAO_f2LDQ.mp4/U5vAO_f2LDQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U5vAO_f2LDQ.mp4/U5vAO_f2LDQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U5vAO_f2LDQ.m3u8/U5vAO_f2LDQ.m3u8"}, "slug": "cell-cycle-phases", "video_id": "U5vAO_f2LDQ", "youtube_id": "U5vAO_f2LDQ", "readable_id": "cell-cycle-phases"}, "_eAWDuLYVfg": {"duration": 281, "path": "khan/math/geometry/transformations/properties-definitions-of-translations/possible-transformations-example/", "keywords": "", "id": "_eAWDuLYVfg", "title": "How to determine the type of transformation according to points and their images (example)", "description": "Sal is given information about a transformation in terms of a few pairs of points and their corresponding images, and he determines what kind of transformation it can be.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_eAWDuLYVfg.mp4/_eAWDuLYVfg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_eAWDuLYVfg.mp4/_eAWDuLYVfg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_eAWDuLYVfg.m3u8/_eAWDuLYVfg.m3u8"}, "slug": "possible-transformations-example", "video_id": "_eAWDuLYVfg", "youtube_id": "_eAWDuLYVfg", "readable_id": "possible-transformations-example"}, "6YRGEsQWZzY": {"duration": 502, "path": "khan/math/differential-equations/first-order-differential-equations/homogeneous-equations/first-order-homogenous-equations-2/", "keywords": "homogeneous, differential, equations", "id": "6YRGEsQWZzY", "title": "First order homogeneous equations 2", "description": "Another example of using substitution to solve a first order homogeneous differential equations.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6YRGEsQWZzY.mp4/6YRGEsQWZzY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6YRGEsQWZzY.mp4/6YRGEsQWZzY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6YRGEsQWZzY.m3u8/6YRGEsQWZzY.m3u8"}, "slug": "first-order-homogenous-equations-2", "video_id": "6YRGEsQWZzY", "youtube_id": "6YRGEsQWZzY", "readable_id": "first-order-homogenous-equations-2"}, "YZBStgZGyDY": {"duration": 364, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/complicated_equations/solving-equations-with-the-distributive-property/", "keywords": "U02_L1_T2_we1, Solving, Equations, with, the, Distributive, Property, CC_6_EE_3, CC_8_EE_7, CC_8_EE_7_b, CC_39336_A-REI_1, CC_39336_A-REI_3", "id": "YZBStgZGyDY", "title": "How to solve an equation using the distributive property", "description": "Sal solves the equation -9 - (9x - 6) = 3(4x + 6) using the distributive property.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YZBStgZGyDY.mp4/YZBStgZGyDY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YZBStgZGyDY.mp4/YZBStgZGyDY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YZBStgZGyDY.m3u8/YZBStgZGyDY.m3u8"}, "slug": "solving-equations-with-the-distributive-property", "video_id": "YZBStgZGyDY", "youtube_id": "YZBStgZGyDY", "readable_id": "solving-equations-with-the-distributive-property"}, "8iKsY8C5VW8": {"duration": 570, "path": "khan/math/probability/independent-dependent-probability/dependent_probability/analyzing-dependent-probability/", "keywords": "", "id": "8iKsY8C5VW8", "title": "Analyzing dependent probability", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8iKsY8C5VW8.mp4/8iKsY8C5VW8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8iKsY8C5VW8.mp4/8iKsY8C5VW8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8iKsY8C5VW8.m3u8/8iKsY8C5VW8.m3u8"}, "slug": "analyzing-dependent-probability", "video_id": "8iKsY8C5VW8", "youtube_id": "8iKsY8C5VW8", "readable_id": "analyzing-dependent-probability"}, "N0L00FZnhtg": {"duration": 506, "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolistic-competition-oligop/oligopolies-duopolies-collusion-and-cartels/", "keywords": "microeconomics, OPEC", "id": "N0L00FZnhtg", "title": "Oligopolies, duopolies, collusion, and cartels", "description": "Thinking about when oligopolies behave more like monopolies or perfect competitors", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N0L00FZnhtg.mp4/N0L00FZnhtg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N0L00FZnhtg.mp4/N0L00FZnhtg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N0L00FZnhtg.m3u8/N0L00FZnhtg.m3u8"}, "slug": "oligopolies-duopolies-collusion-and-cartels", "video_id": "N0L00FZnhtg", "youtube_id": "N0L00FZnhtg", "readable_id": "oligopolies-duopolies-collusion-and-cartels"}, "irYfbY_jryY": {"duration": 316, "path": "khan/humanities/art-americas/south-america-early/amazonian-people/kayap-headdress-a-glimpse-of-life-in-the-amazon-rainforest/", "keywords": "", "id": "irYfbY_jryY", "title": "Kayap\u00f3 Headdress: a glimpse of life in the Amazon rainforest", "description": "Headdress, 20th century, feathers (Anodorhynchus hyacinthinus and Psarocolius decumanus) and plant materials, approximately 1 m x 60 cm, Kayap\u00f3 (Cayapo) people, Para, Brazil (The British Museum)\nSpeakers: Dr. Jago Cooper (Curator, Head of the Americas, \u00a0The British Museum) and Dr. Steven Zucker\n\nSpecial thanks to Dr. Jago Cooper, Matthew Cock, Kate Jarvis and The British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/irYfbY_jryY.mp4/irYfbY_jryY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/irYfbY_jryY.mp4/irYfbY_jryY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/irYfbY_jryY.m3u8/irYfbY_jryY.m3u8"}, "slug": "kayap-headdress-a-glimpse-of-life-in-the-amazon-rainforest", "video_id": "irYfbY_jryY", "youtube_id": "irYfbY_jryY", "readable_id": "kayap-headdress-a-glimpse-of-life-in-the-amazon-rainforest"}, "o-ZbdYVGehI": {"duration": 145, "path": "khan/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials/factoring-special-products-2/", "keywords": "U09_L2_T1_we2, Factoring, Special, Products, CC_39336_A-SSE_2", "id": "o-ZbdYVGehI", "title": "How to factor a fourth degree polynomial using the \"perfect square\" form (example)", "description": "Sal factors 25x^4-30x^2+9 as (5x^2-3)^2.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o-ZbdYVGehI.mp4/o-ZbdYVGehI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o-ZbdYVGehI.mp4/o-ZbdYVGehI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o-ZbdYVGehI.m3u8/o-ZbdYVGehI.m3u8"}, "slug": "factoring-special-products-2", "video_id": "o-ZbdYVGehI", "youtube_id": "o-ZbdYVGehI", "readable_id": "factoring-special-products-2"}, "wbfDqHk-ryM": {"duration": 578, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/hypovolemic-shock/", "keywords": "", "id": "wbfDqHk-ryM", "title": "Hypovolemic shock", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wbfDqHk-ryM.mp4/wbfDqHk-ryM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wbfDqHk-ryM.mp4/wbfDqHk-ryM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wbfDqHk-ryM.m3u8/wbfDqHk-ryM.m3u8"}, "slug": "hypovolemic-shock", "video_id": "wbfDqHk-ryM", "youtube_id": "wbfDqHk-ryM", "readable_id": "hypovolemic-shock"}, "5flvVD_tnRw": {"duration": 554, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/english-horn-pedro/", "keywords": "", "id": "5flvVD_tnRw", "title": "English Horn: Interview and demonstration with Pedro Diaz", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5flvVD_tnRw.mp4/5flvVD_tnRw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5flvVD_tnRw.mp4/5flvVD_tnRw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5flvVD_tnRw.m3u8/5flvVD_tnRw.m3u8"}, "slug": "english-horn-pedro", "video_id": "5flvVD_tnRw", "youtube_id": "5flvVD_tnRw", "readable_id": "english-horn-pedro"}, "ye28W_OygOw": {"duration": 228, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/autonomic-somatic-nervous-system/", "keywords": "autonomic nervous system, somatic nervous system", "id": "ye28W_OygOw", "title": "Autonomic vs somatic nervous system", "description": "Understand the different divisions of the brain that control our muscles.\u00a0 By Raja Narayan.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ye28W_OygOw.mp4/ye28W_OygOw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ye28W_OygOw.mp4/ye28W_OygOw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ye28W_OygOw.m3u8/ye28W_OygOw.m3u8"}, "slug": "autonomic-somatic-nervous-system", "video_id": "ye28W_OygOw", "youtube_id": "ye28W_OygOw", "readable_id": "autonomic-somatic-nervous-system"}, "sTLsPHluQdM": {"duration": 176, "path": "khan/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture/ganesha-deity/", "keywords": "", "id": "sTLsPHluQdM", "title": "The Hindu deity Ganesha", "description": "Hear the origin story of the Hindu deity Ganesha and learn how to identify depictions of Ganesha with the use of artworks in the Asian Art Museum's collection. Learn more about Ganesha on\u00a0education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sTLsPHluQdM.mp4/sTLsPHluQdM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sTLsPHluQdM.mp4/sTLsPHluQdM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sTLsPHluQdM.m3u8/sTLsPHluQdM.m3u8"}, "slug": "ganesha-deity", "video_id": "sTLsPHluQdM", "youtube_id": "sTLsPHluQdM", "readable_id": "ganesha-deity"}, "LIFHYUGrYqw": {"duration": 71, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties/triple-bond-linear/", "keywords": "", "id": "LIFHYUGrYqw", "title": "Triple bonds cause linear configurations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LIFHYUGrYqw.mp4/LIFHYUGrYqw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LIFHYUGrYqw.mp4/LIFHYUGrYqw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LIFHYUGrYqw.m3u8/LIFHYUGrYqw.m3u8"}, "slug": "triple-bond-linear", "video_id": "LIFHYUGrYqw", "youtube_id": "LIFHYUGrYqw", "readable_id": "triple-bond-linear"}, "znE4Nq9NJCQ": {"duration": 611, "path": "khan/math/differential-equations/second-order-differential-equations/undetermined-coefficients/undetermined-coefficients-1/", "keywords": "undetermined, coefficients, nonhomogeneous, differential, equations", "id": "znE4Nq9NJCQ", "title": "Undetermined coefficients 1", "description": "Using the method of undetermined coefficients to solve nonhomogeneous linear differential equations.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/znE4Nq9NJCQ.mp4/znE4Nq9NJCQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/znE4Nq9NJCQ.mp4/znE4Nq9NJCQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/znE4Nq9NJCQ.m3u8/znE4Nq9NJCQ.m3u8"}, "slug": "undetermined-coefficients-1", "video_id": "znE4Nq9NJCQ", "youtube_id": "znE4Nq9NJCQ", "readable_id": "undetermined-coefficients-1"}, "o1Y0G8Z67iU": {"duration": 472, "path": "khan/humanities/history/american-civics/american-civics/medicare-sustainability/", "keywords": "medicare, social, security, medicaid", "id": "o1Y0G8Z67iU", "title": "Medicare sustainability", "description": "How medicare is funded and why it is even less sustainable than social security", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o1Y0G8Z67iU.mp4/o1Y0G8Z67iU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o1Y0G8Z67iU.mp4/o1Y0G8Z67iU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o1Y0G8Z67iU.m3u8/o1Y0G8Z67iU.m3u8"}, "slug": "medicare-sustainability", "video_id": "o1Y0G8Z67iU", "youtube_id": "o1Y0G8Z67iU", "readable_id": "medicare-sustainability"}, "4JqH55rLGKY": {"duration": 189, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/reading_data/reading-pie-graphs-circle-graphs/", "keywords": "u08_l1_t2_we1, Reading, Pie, Graphs, (Circle, Graphs)", "id": "4JqH55rLGKY", "title": "Reading pie graphs (circle graphs)", "description": "Reading Pie Graphs (Circle Graphs)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4JqH55rLGKY.mp4/4JqH55rLGKY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4JqH55rLGKY.mp4/4JqH55rLGKY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4JqH55rLGKY.m3u8/4JqH55rLGKY.m3u8"}, "slug": "reading-pie-graphs-circle-graphs", "video_id": "4JqH55rLGKY", "youtube_id": "4JqH55rLGKY", "readable_id": "reading-pie-graphs-circle-graphs"}, "H7nrVDV8ahc": {"duration": 742, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/exponential-decay-formula-proof-can-skip-involves-calculus/", "keywords": "radioactive, decay, chemistry, physics", "id": "H7nrVDV8ahc", "title": "Exponential decay formula proof (can skip, involves calculus)", "description": "Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H7nrVDV8ahc.mp4/H7nrVDV8ahc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H7nrVDV8ahc.mp4/H7nrVDV8ahc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H7nrVDV8ahc.m3u8/H7nrVDV8ahc.m3u8"}, "slug": "exponential-decay-formula-proof-can-skip-involves-calculus", "video_id": "H7nrVDV8ahc", "youtube_id": "H7nrVDV8ahc", "readable_id": "exponential-decay-formula-proof-can-skip-involves-calculus"}, "SauhB2fYQkM": {"duration": 882, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/role-of-the-sarcoplasmic-reticulum-in-muscle-cells/", "keywords": "sarcoplasmic, reticulum, muscle, contraction, motor, neuron", "id": "SauhB2fYQkM", "title": "Role of the sarcoplasmic reticulum in muscle cells", "description": "The role of the sarcoplasmic reticulum in controlling calcium ion concentrations within the muscle cell.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SauhB2fYQkM.mp4/SauhB2fYQkM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SauhB2fYQkM.mp4/SauhB2fYQkM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SauhB2fYQkM.m3u8/SauhB2fYQkM.m3u8"}, "slug": "role-of-the-sarcoplasmic-reticulum-in-muscle-cells", "video_id": "SauhB2fYQkM", "youtube_id": "SauhB2fYQkM", "readable_id": "role-of-the-sarcoplasmic-reticulum-in-muscle-cells"}, "BZmtnCqTWik": {"duration": 1409, "path": "khan/humanities/history/1600s-1800s/french-revolution-tutorial/french-revolution-part-3-reign-of-terror/", "keywords": "guillotine, reign, of, terror, french, revolution", "id": "BZmtnCqTWik", "title": "French Revolution (part 3) - Reign of Terror", "description": "The Reign of Terror", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BZmtnCqTWik.mp4/BZmtnCqTWik.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BZmtnCqTWik.mp4/BZmtnCqTWik.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BZmtnCqTWik.m3u8/BZmtnCqTWik.m3u8"}, "slug": "french-revolution-part-3-reign-of-terror", "video_id": "BZmtnCqTWik", "youtube_id": "BZmtnCqTWik", "readable_id": "french-revolution-part-3-reign-of-terror"}, "7S1MLJOG-5A": {"duration": 183, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-perimeter-area/perimeter-and-area-of-a-non-standard-polygon/", "keywords": "u07_l2_t2_we3, Perimeter, and, Area, of, Non-Standard, Polygon", "id": "7S1MLJOG-5A", "title": "Perimeter and area of a non-standard polygon", "description": "Perimeter and Area of a Non-Standard Polygon", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7S1MLJOG-5A.mp4/7S1MLJOG-5A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7S1MLJOG-5A.mp4/7S1MLJOG-5A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7S1MLJOG-5A.m3u8/7S1MLJOG-5A.m3u8"}, "slug": "perimeter-and-area-of-a-non-standard-polygon", "video_id": "7S1MLJOG-5A", "youtube_id": "7S1MLJOG-5A", "readable_id": "perimeter-and-area-of-a-non-standard-polygon"}, "MxyQgpgc7Ds": {"duration": 227, "path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/john-constable-view-on-the-stour-near-dedham/", "keywords": "Romanticism, Constable, English, England, painting, landscape, Dedham", "id": "MxyQgpgc7Ds", "title": "Constable, View on the Stour near Dedham", "description": "John Constable, View on the Stour near Dedham, 1822, oil on canvas, 51 x 74 inches (The Huntington Library, Art Collections, and Botanical Gardens, San Marino, CA) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MxyQgpgc7Ds.mp4/MxyQgpgc7Ds.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MxyQgpgc7Ds.mp4/MxyQgpgc7Ds.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MxyQgpgc7Ds.m3u8/MxyQgpgc7Ds.m3u8"}, "slug": "john-constable-view-on-the-stour-near-dedham", "video_id": "MxyQgpgc7Ds", "youtube_id": "MxyQgpgc7Ds", "readable_id": "john-constable-view-on-the-stour-near-dedham"}, "y1PCYctq3yo": {"duration": 464, "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/multiple-sclerosis-diagnosis/", "keywords": "", "id": "y1PCYctq3yo", "title": "Multiple sclerosis diagnosis", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y1PCYctq3yo.mp4/y1PCYctq3yo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y1PCYctq3yo.mp4/y1PCYctq3yo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y1PCYctq3yo.m3u8/y1PCYctq3yo.m3u8"}, "slug": "multiple-sclerosis-diagnosis", "video_id": "y1PCYctq3yo", "youtube_id": "y1PCYctq3yo", "readable_id": "multiple-sclerosis-diagnosis"}, "hrhD77JhtOA": {"duration": 383, "path": "khan/partner-content/big-history-project/what-is-big-history/what-are-disciplines/bhp-intro-to-cosmology/", "keywords": "", "id": "hrhD77JhtOA", "title": "Ways of Knowing \u2013 Introduction to Cosmology", "description": "The history of the Universe decorates the night sky. Learn how to watch this history by studying cosmic light emissions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hrhD77JhtOA.mp4/hrhD77JhtOA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hrhD77JhtOA.mp4/hrhD77JhtOA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hrhD77JhtOA.m3u8/hrhD77JhtOA.m3u8"}, "slug": "bhp-intro-to-cosmology", "video_id": "hrhD77JhtOA", "youtube_id": "hrhD77JhtOA", "readable_id": "bhp-intro-to-cosmology"}, "XuDGJ-LUnAU": {"duration": 571, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-35/", "keywords": "gmat, data, sufficiency, math", "id": "XuDGJ-LUnAU", "title": "GMAT: Data sufficiency 35", "description": "138-140, pg. 289", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XuDGJ-LUnAU.mp4/XuDGJ-LUnAU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XuDGJ-LUnAU.mp4/XuDGJ-LUnAU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XuDGJ-LUnAU.m3u8/XuDGJ-LUnAU.m3u8"}, "slug": "gmat-data-sufficiency-35", "video_id": "XuDGJ-LUnAU", "youtube_id": "XuDGJ-LUnAU", "readable_id": "gmat-data-sufficiency-35"}, "MyvRxKM0xns": {"duration": 664, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-basic-trigonometry/", "keywords": "geometry, trigonometry", "id": "MyvRxKM0xns", "title": "CA Geometry: Basic trigonometry", "description": "61-65, basic trigonometry", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MyvRxKM0xns.mp4/MyvRxKM0xns.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MyvRxKM0xns.mp4/MyvRxKM0xns.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MyvRxKM0xns.m3u8/MyvRxKM0xns.m3u8"}, "slug": "ca-geometry-basic-trigonometry", "video_id": "MyvRxKM0xns", "youtube_id": "MyvRxKM0xns", "readable_id": "ca-geometry-basic-trigonometry"}, "JEHejQphIYc": {"duration": 172, "path": "khan/math/algebra-basics/core-algebra-foundations/operations-with-decimals/multiplying-decimals/", "keywords": "U03_L2_T2_we1, Multiplying, Decimals, CC_5_NBT_7, CC_6_NS_3", "id": "JEHejQphIYc", "title": "Multiplying decimals example", "description": "Multiplying decimals? Try multiplying without the decimals first, them add them back in. We'll show you.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JEHejQphIYc.mp4/JEHejQphIYc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JEHejQphIYc.mp4/JEHejQphIYc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JEHejQphIYc.m3u8/JEHejQphIYc.m3u8"}, "slug": "multiplying-decimals", "video_id": "JEHejQphIYc", "youtube_id": "JEHejQphIYc", "readable_id": "multiplying-decimals"}, "VejCw2NlE60": {"duration": 342, "path": "khan/math/geometry/triangle-properties/perpendicular_bisectors/circumcenter-of-a-right-triangle/", "keywords": "geometry", "id": "VejCw2NlE60", "title": "Circumcenter of a right triangle", "description": "Showing that the midpoint of the hypotenuse is the circumcenter", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VejCw2NlE60.mp4/VejCw2NlE60.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VejCw2NlE60.mp4/VejCw2NlE60.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VejCw2NlE60.m3u8/VejCw2NlE60.m3u8"}, "slug": "circumcenter-of-a-right-triangle", "video_id": "VejCw2NlE60", "youtube_id": "VejCw2NlE60", "readable_id": "circumcenter-of-a-right-triangle"}, "lsvqJfvWRfs": {"duration": 463, "path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/lipids-as-cofactors-and-signaling-molecules/", "keywords": "", "id": "lsvqJfvWRfs", "title": "Lipids as cofactors and signaling molecules", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lsvqJfvWRfs.mp4/lsvqJfvWRfs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lsvqJfvWRfs.mp4/lsvqJfvWRfs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lsvqJfvWRfs.m3u8/lsvqJfvWRfs.m3u8"}, "slug": "lipids-as-cofactors-and-signaling-molecules", "video_id": "lsvqJfvWRfs", "youtube_id": "lsvqJfvWRfs", "readable_id": "lipids-as-cofactors-and-signaling-molecules"}, "-YfemQNTkvA": {"duration": 690, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/mass-spectrometer/", "keywords": "", "id": "-YfemQNTkvA", "title": "Mass spectrometer", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-YfemQNTkvA.mp4/-YfemQNTkvA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-YfemQNTkvA.mp4/-YfemQNTkvA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-YfemQNTkvA.m3u8/-YfemQNTkvA.m3u8"}, "slug": "mass-spectrometer", "video_id": "-YfemQNTkvA", "youtube_id": "-YfemQNTkvA", "readable_id": "mass-spectrometer"}, "U2ovEuEUxXQ": {"duration": 349, "path": "khan/math/pre-algebra/fractions-pre-alg/equivalent-fractions-pre-alg/equivalent-fractions/", "keywords": "fractions, math, CC_3_NF_3, CC_3_NF_3_a, CC_3_NF_3_b, CC_3_NF_3_c, CC_3_NF_3_d, CC_4_NF_1", "id": "U2ovEuEUxXQ", "title": "Equivalent fractions", "description": "Introduces the concept of equivalent fractions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U2ovEuEUxXQ.mp4/U2ovEuEUxXQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U2ovEuEUxXQ.mp4/U2ovEuEUxXQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U2ovEuEUxXQ.m3u8/U2ovEuEUxXQ.m3u8"}, "slug": "equivalent-fractions", "video_id": "U2ovEuEUxXQ", "youtube_id": "U2ovEuEUxXQ", "readable_id": "equivalent-fractions"}, "gYpokkRFvO8": {"duration": 418, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/arterial-stiffness/bernoulli-s-equation-of-total-energy/", "keywords": "", "id": "gYpokkRFvO8", "title": "Bernoulli's equation of total energy", "description": "Learn how total energy of a fluid helps explain why fluids can move from low pressure to high pressure! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gYpokkRFvO8.mp4/gYpokkRFvO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gYpokkRFvO8.mp4/gYpokkRFvO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gYpokkRFvO8.m3u8/gYpokkRFvO8.m3u8"}, "slug": "bernoulli-s-equation-of-total-energy", "video_id": "gYpokkRFvO8", "youtube_id": "gYpokkRFvO8", "readable_id": "bernoulli-s-equation-of-total-energy"}, "-hQiIxfoPP0": {"duration": 127, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/style-tone-basic/", "keywords": "education,online learning,learning,lessons", "id": "-hQiIxfoPP0", "title": "Writing: Concision, style, and tone \u2014 Basic example 2", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing style and tone.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-hQiIxfoPP0.mp4/-hQiIxfoPP0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-hQiIxfoPP0.mp4/-hQiIxfoPP0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-hQiIxfoPP0.m3u8/-hQiIxfoPP0.m3u8"}, "slug": "style-tone-basic", "video_id": "-hQiIxfoPP0", "youtube_id": "-hQiIxfoPP0", "readable_id": "style-tone-basic"}, "J1twbrHel3o": {"duration": 915, "path": "khan/math/probability/statistics-inferential/sampling_distribution/standard-error-of-the-mean/", "keywords": "standard, error, of, the, mean, deviation, sampling, distribution, sample, CC_6_SP_2, CC_6_SP_4, CC_6_SP_5_c, CC_6_SP_5_d, CC_7_SP_2", "id": "J1twbrHel3o", "title": "Standard error of the mean", "description": "Standard Error of the Mean (a.k.a. the standard deviation of the sampling distribution of the sample mean!)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J1twbrHel3o.mp4/J1twbrHel3o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J1twbrHel3o.mp4/J1twbrHel3o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J1twbrHel3o.m3u8/J1twbrHel3o.m3u8"}, "slug": "standard-error-of-the-mean", "video_id": "J1twbrHel3o", "youtube_id": "J1twbrHel3o", "readable_id": "standard-error-of-the-mean"}, "V-rko8jgJ9o": {"duration": 934, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/p-e-discussion/", "keywords": "price, to, earnings, p/e, stocks, investing, valuation", "id": "V-rko8jgJ9o", "title": "P/E discussion", "description": "Discussion of the price-to-earnings ratio", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/V-rko8jgJ9o.mp4/V-rko8jgJ9o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/V-rko8jgJ9o.mp4/V-rko8jgJ9o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/V-rko8jgJ9o.m3u8/V-rko8jgJ9o.m3u8"}, "slug": "p-e-discussion", "video_id": "V-rko8jgJ9o", "youtube_id": "V-rko8jgJ9o", "readable_id": "p-e-discussion"}, "VMtXfhvQRTo": {"duration": 662, "path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-22/", "keywords": "crash course", "id": "VMtXfhvQRTo", "title": "The Renaissance: Was it a Thing?", "description": "In which John Green teaches you about the European Renaissance. European learning changed the world in the 15th and 16th century, but was it a cultural revolution, or an evolution? We'd argue that any cultural shift that occurs over a couple of hundred years isn't too overwhelming to the people who live through it. In retrospect though, the cultural bloom in Europe during this time was pretty impressive. In addition to investigating what caused the Renaissance and who benefitted from the changes that occurred, John will tell you just how the Ninja Turtles got mixed up in all this.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VMtXfhvQRTo.mp4/VMtXfhvQRTo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VMtXfhvQRTo.mp4/VMtXfhvQRTo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VMtXfhvQRTo.m3u8/VMtXfhvQRTo.m3u8"}, "slug": "crash-course-world-history-22", "video_id": "VMtXfhvQRTo", "youtube_id": "VMtXfhvQRTo", "readable_id": "crash-course-world-history-22"}, "xR4AnXDBnsw": {"duration": 354, "path": "khan/math/integral-calculus/indefinite-definite-integrals/definite_integrals/evaluating-simple-definite-integral/", "keywords": "", "id": "xR4AnXDBnsw", "title": "Evaluating simple definite integral", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xR4AnXDBnsw.mp4/xR4AnXDBnsw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xR4AnXDBnsw.mp4/xR4AnXDBnsw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xR4AnXDBnsw.m3u8/xR4AnXDBnsw.m3u8"}, "slug": "evaluating-simple-definite-integral", "video_id": "xR4AnXDBnsw", "youtube_id": "xR4AnXDBnsw", "readable_id": "evaluating-simple-definite-integral"}, "R5YiO6rKr-w": {"duration": 653, "path": "khan/test-prep/mcat/cells/cellular-development/telomeres-and-cell-senescence/", "keywords": "", "id": "R5YiO6rKr-w", "title": "Telomeres and cell senescence", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R5YiO6rKr-w.mp4/R5YiO6rKr-w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R5YiO6rKr-w.mp4/R5YiO6rKr-w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R5YiO6rKr-w.m3u8/R5YiO6rKr-w.m3u8"}, "slug": "telomeres-and-cell-senescence", "video_id": "R5YiO6rKr-w", "youtube_id": "R5YiO6rKr-w", "readable_id": "telomeres-and-cell-senescence"}, "MpRUEGD2-_c": {"duration": 428, "path": "khan/math/algebra/systems-of-linear-equations/possible-number-of-solutions-of-systems-of-linear-equations/infinite-solutions-to-systems/", "keywords": "", "id": "MpRUEGD2-_c", "title": "Arbegla's dependent system of equations", "description": "Sal gives an example of a system of equations that has infinite solutions!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MpRUEGD2-_c.mp4/MpRUEGD2-_c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MpRUEGD2-_c.mp4/MpRUEGD2-_c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MpRUEGD2-_c.m3u8/MpRUEGD2-_c.m3u8"}, "slug": "infinite-solutions-to-systems", "video_id": "MpRUEGD2-_c", "youtube_id": "MpRUEGD2-_c", "readable_id": "infinite-solutions-to-systems"}, "RFesGHsuFZw": {"duration": 346, "path": "khan/math/geometry/congruence/theorems-using-triangle-congruence/congruent-triangle-proof-example/", "keywords": "geometry", "id": "RFesGHsuFZw", "title": "How to prove general theorems using triangle congruence (example)", "description": "Sal proves that a point is the midpoint of a segment using triangle congruence.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RFesGHsuFZw.mp4/RFesGHsuFZw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RFesGHsuFZw.mp4/RFesGHsuFZw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RFesGHsuFZw.m3u8/RFesGHsuFZw.m3u8"}, "slug": "congruent-triangle-proof-example", "video_id": "RFesGHsuFZw", "youtube_id": "RFesGHsuFZw", "readable_id": "congruent-triangle-proof-example"}, "skAptImhx1Y": {"duration": 262, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q1-harder/", "keywords": "", "id": "skAptImhx1Y", "title": "Ratios, rates, and proportions \u2014 Harder example", "description": "Watch Sal work through a harder Ratios, rates, and proportions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/skAptImhx1Y.mp4/skAptImhx1Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/skAptImhx1Y.mp4/skAptImhx1Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/skAptImhx1Y.m3u8/skAptImhx1Y.m3u8"}, "slug": "sat-math-q1-harder", "video_id": "skAptImhx1Y", "youtube_id": "skAptImhx1Y", "readable_id": "sat-math-q1-harder"}, "6t9ogglXNIM": {"duration": 594, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-hairy-trig-and-algebra-part-2/", "keywords": "2010, IIT, JEE, Paper, #38, Hairy, Trig, and, Algebra, (Part, 2)", "id": "6t9ogglXNIM", "title": "IIT JEE hairy trig and algebra (part 2)", "description": "2010 IIT JEE Paper 1 #38 Hairy Trig and Algebra (Part 2)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6t9ogglXNIM.mp4/6t9ogglXNIM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6t9ogglXNIM.mp4/6t9ogglXNIM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6t9ogglXNIM.m3u8/6t9ogglXNIM.m3u8"}, "slug": "iit-jee-hairy-trig-and-algebra-part-2", "video_id": "6t9ogglXNIM", "youtube_id": "6t9ogglXNIM", "readable_id": "iit-jee-hairy-trig-and-algebra-part-2"}, "UY5S4xntyRk": {"duration": 85, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-8-1/", "keywords": "", "id": "UY5S4xntyRk", "title": "1 Rounding", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UY5S4xntyRk.mp4/UY5S4xntyRk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UY5S4xntyRk.mp4/UY5S4xntyRk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UY5S4xntyRk.m3u8/UY5S4xntyRk.m3u8"}, "slug": "sat-2008-may-8-1", "video_id": "UY5S4xntyRk", "youtube_id": "UY5S4xntyRk", "readable_id": "sat-2008-may-8-1"}, "sCVyvfOLI6U": {"duration": 93, "path": "khan/math/pre-algebra/fractions-pre-alg/decimals-fractions-pre-alg/converting-fractions-to-decimals-ex2/", "keywords": "Converting, fractions, to, decimals, ex2", "id": "sCVyvfOLI6U", "title": "Fraction to decimal example", "description": "This is a great example of converting a fraction to a decimal. Use a scratch pad so you can follow along.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sCVyvfOLI6U.mp4/sCVyvfOLI6U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sCVyvfOLI6U.mp4/sCVyvfOLI6U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sCVyvfOLI6U.m3u8/sCVyvfOLI6U.m3u8"}, "slug": "converting-fractions-to-decimals-ex2", "video_id": "sCVyvfOLI6U", "youtube_id": "sCVyvfOLI6U", "readable_id": "converting-fractions-to-decimals-ex2"}, "PYd99ItlLEc": {"duration": 323, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/core-alg-negative-exponents/introduction-to-negative-exponents/", "keywords": "", "id": "PYd99ItlLEc", "title": "Introduction to negative exponents", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PYd99ItlLEc.mp4/PYd99ItlLEc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PYd99ItlLEc.mp4/PYd99ItlLEc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PYd99ItlLEc.m3u8/PYd99ItlLEc.m3u8"}, "slug": "introduction-to-negative-exponents", "video_id": "PYd99ItlLEc", "youtube_id": "PYd99ItlLEc", "readable_id": "introduction-to-negative-exponents"}, "m1DOnLhVuX4": {"duration": 548, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/complications-after-a-heart-attack-myocardial-infarction/", "keywords": "", "id": "m1DOnLhVuX4", "title": "Complications after a heart attack (myocardial infarction)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m1DOnLhVuX4.mp4/m1DOnLhVuX4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m1DOnLhVuX4.mp4/m1DOnLhVuX4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m1DOnLhVuX4.m3u8/m1DOnLhVuX4.m3u8"}, "slug": "complications-after-a-heart-attack-myocardial-infarction", "video_id": "m1DOnLhVuX4", "youtube_id": "m1DOnLhVuX4", "readable_id": "complications-after-a-heart-attack-myocardial-infarction"}, "q3d7488qjgs": {"duration": 194, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/danny-oneill/kauffman-danny-oneill3/", "keywords": "", "id": "q3d7488qjgs", "title": "Danny O'Neill - Finding the perfect customer", "description": "Danny O\u2019Neill, President of The Roasterie, discusses the importance of finding your perfect customer.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q3d7488qjgs.mp4/q3d7488qjgs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q3d7488qjgs.mp4/q3d7488qjgs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q3d7488qjgs.m3u8/q3d7488qjgs.m3u8"}, "slug": "kauffman-danny-oneill3", "video_id": "q3d7488qjgs", "youtube_id": "q3d7488qjgs", "readable_id": "kauffman-danny-oneill3"}, "f15zA0PhSek": {"duration": 533, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/basic-equation-practice/equations-3/", "keywords": "algebra, solving, equations, CC_7_EE_1, CC_7_EE_4_a", "id": "f15zA0PhSek", "title": "Introduction to solving an equation with variables on both sides", "description": "Sal solves the equation 2x + 3 = 5x - 2.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/f15zA0PhSek.mp4/f15zA0PhSek.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/f15zA0PhSek.mp4/f15zA0PhSek.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/f15zA0PhSek.m3u8/f15zA0PhSek.m3u8"}, "slug": "equations-3", "video_id": "f15zA0PhSek", "youtube_id": "f15zA0PhSek", "readable_id": "equations-3"}, "8CJ6Qdcoxsc": {"duration": 319, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/more-equation-practice/sum-consecutive-integers/", "keywords": "", "id": "8CJ6Qdcoxsc", "title": "Solving a consecutive integer problem algebraically", "description": "The sum of 4 consecutive odd integers is 136. What are the 4 integers?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8CJ6Qdcoxsc.mp4/8CJ6Qdcoxsc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8CJ6Qdcoxsc.mp4/8CJ6Qdcoxsc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8CJ6Qdcoxsc.m3u8/8CJ6Qdcoxsc.m3u8"}, "slug": "sum-consecutive-integers", "video_id": "8CJ6Qdcoxsc", "youtube_id": "8CJ6Qdcoxsc", "readable_id": "sum-consecutive-integers"}, "JoL2pO3O0rg": {"duration": 609, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/black-holes/", "keywords": "Black, Holes, Event, Horizon, singularity, marquee", "id": "JoL2pO3O0rg", "title": "Black holes", "description": "Black Holes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JoL2pO3O0rg.mp4/JoL2pO3O0rg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JoL2pO3O0rg.mp4/JoL2pO3O0rg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JoL2pO3O0rg.m3u8/JoL2pO3O0rg.m3u8"}, "slug": "black-holes", "video_id": "JoL2pO3O0rg", "youtube_id": "JoL2pO3O0rg", "readable_id": "black-holes"}, "16aKF_eDGdw": {"duration": 239, "path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/calculating-integral-with-shell-method/", "keywords": "", "id": "16aKF_eDGdw", "title": "Calculating integral with shell method", "description": "Evaluating integral set up with shell method for two functions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/16aKF_eDGdw.mp4/16aKF_eDGdw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/16aKF_eDGdw.mp4/16aKF_eDGdw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/16aKF_eDGdw.m3u8/16aKF_eDGdw.m3u8"}, "slug": "calculating-integral-with-shell-method", "video_id": "16aKF_eDGdw", "youtube_id": "16aKF_eDGdw", "readable_id": "calculating-integral-with-shell-method"}, "VEv7Mmx1V4w": {"duration": 139, "path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/st-ursula/", "keywords": "British Museum", "id": "VEv7Mmx1V4w", "title": "Reliquary bust of a companion of Saint Ursula", "description": "Exhibition curator, James Robinson (video\u00a0from the British Museum), bust from the Metropolitan Museum of Art), c. 1520-30.\n\nThis beautiful woman is most likely intended to represent one of the companions of St Ursula. According to legend St Ursula was an English princess who decided to go on a holy pilgrimage before her marriage. The legend also states that she took with her 11,000 virgin companions as company for the journey.\n\nThe troop of 11,000 virgins travelled to Cologne, Basle and Rome and made their way home back through Cologne. It was here that they met with a group of pagan Huns, whose leader wanted to marry Ursula. Ursula being already engaged and a virgin refused! This made the Huns so angry that they murdered all 11,000 of the girls by arrow fire.\n\n11,000 virgins is certainly a large party \u2013 the legend of there being 11,000 virgins became fixed in the 10th century, but this was probably through a misunderstanding of a Latin numerical inscription which read 11 rather than 11,000! Once the legend took off it became incredibly popular and indeed provided much inspiration for medieval craftsmen to create objects such as this.\n\nThe \u2018door\u2019 in the centre of the head of this reliquary opens to reveal a cavity which once held a skull relic of this unknown female saint. \u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VEv7Mmx1V4w.mp4/VEv7Mmx1V4w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VEv7Mmx1V4w.mp4/VEv7Mmx1V4w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VEv7Mmx1V4w.m3u8/VEv7Mmx1V4w.m3u8"}, "slug": "st-ursula", "video_id": "VEv7Mmx1V4w", "youtube_id": "VEv7Mmx1V4w", "readable_id": "st-ursula"}, "CH6FQhlZn6k": {"duration": 982, "path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/napoleon-forced-to-abdicate/", "keywords": "napoleon, abdicate, exite, elba", "id": "CH6FQhlZn6k", "title": "Napoleon forced to abdicate", "description": "The Sixth Coalition forces Napoleon into exile on Elba", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CH6FQhlZn6k.mp4/CH6FQhlZn6k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CH6FQhlZn6k.mp4/CH6FQhlZn6k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CH6FQhlZn6k.m3u8/CH6FQhlZn6k.m3u8"}, "slug": "napoleon-forced-to-abdicate", "video_id": "CH6FQhlZn6k", "youtube_id": "CH6FQhlZn6k", "readable_id": "napoleon-forced-to-abdicate"}, "IiBC4ngwH6E": {"duration": 331, "path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-definition-and-example/", "keywords": "", "id": "IiBC4ngwH6E", "title": "Chain rule definition and example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IiBC4ngwH6E.mp4/IiBC4ngwH6E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IiBC4ngwH6E.mp4/IiBC4ngwH6E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IiBC4ngwH6E.m3u8/IiBC4ngwH6E.m3u8"}, "slug": "chain-rule-definition-and-example", "video_id": "IiBC4ngwH6E", "youtube_id": "IiBC4ngwH6E", "readable_id": "chain-rule-definition-and-example"}, "EUn3yJsc4Cs": {"duration": 87, "path": "khan/college-admissions/explore-college-options/college-search-type-of-college/comparing-public-vs-private-colleges/", "keywords": "", "id": "EUn3yJsc4Cs", "title": "Comparing public vs private colleges", "description": "Filter by public vs. private options using College Board's college search tool", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EUn3yJsc4Cs.mp4/EUn3yJsc4Cs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EUn3yJsc4Cs.mp4/EUn3yJsc4Cs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EUn3yJsc4Cs.m3u8/EUn3yJsc4Cs.m3u8"}, "slug": "comparing-public-vs-private-colleges", "video_id": "EUn3yJsc4Cs", "youtube_id": "EUn3yJsc4Cs", "readable_id": "comparing-public-vs-private-colleges"}, "ngJifVCOmgg": {"duration": 170, "path": "khan/partner-content/exploratorium/expl-sound/light-to-sound/transmitter/", "keywords": "", "id": "ngJifVCOmgg", "title": "Build the transmitter", "description": "The electrical signal from a radio is converted to light with the help of a 9V battery.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ngJifVCOmgg.mp4/ngJifVCOmgg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ngJifVCOmgg.mp4/ngJifVCOmgg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ngJifVCOmgg.m3u8/ngJifVCOmgg.m3u8"}, "slug": "transmitter", "video_id": "ngJifVCOmgg", "youtube_id": "ngJifVCOmgg", "readable_id": "transmitter"}, "PpJMTpTukzE": {"duration": 113, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-22-car-headlights/", "keywords": "", "id": "PpJMTpTukzE", "title": "22 Car headlights", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PpJMTpTukzE.mp4/PpJMTpTukzE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PpJMTpTukzE.mp4/PpJMTpTukzE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PpJMTpTukzE.m3u8/PpJMTpTukzE.m3u8"}, "slug": "sat-22-car-headlights", "video_id": "PpJMTpTukzE", "youtube_id": "PpJMTpTukzE", "readable_id": "sat-22-car-headlights"}, "VFPBf1AZOQg": {"duration": 358, "path": "khan/partner-content/wi-phi/value-theory-1/the-good-life-aristotle/", "keywords": "Aristotle (Author),The Good Life,Philosophy (Field Of Study),Chris Surprenant,University Of New Orleans (College/University),Ancient Greek Philosophy (Field Of Study),Western Philosophy (Field Of Study),History Of Philosophy (Field Of Study),Khan Academy (Nonprofit Organization),Nicomachean Ethics (Book),WiPhi,Wireless Philosophy,Ethics (Quotation Subject),Politics", "id": "VFPBf1AZOQg", "title": "The Good Life: Aristotle", "description": "Chris Surprenant (University of New Orleans) discusses the account of human well-being and the good life presented by Aristotle in the Nicomachean Ethics and Politics. He explains why Aristotle believes that a human being lives well when he acts rightly and possesses all virtues, both intellectual and those relating to good character.\n\nSpeaker: Dr.\u00a0Chris Surprenant, Associate Professor of Philosophy, University of New Orleans", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VFPBf1AZOQg.mp4/VFPBf1AZOQg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VFPBf1AZOQg.mp4/VFPBf1AZOQg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VFPBf1AZOQg.m3u8/VFPBf1AZOQg.m3u8"}, "slug": "the-good-life-aristotle", "video_id": "VFPBf1AZOQg", "youtube_id": "VFPBf1AZOQg", "readable_id": "the-good-life-aristotle"}, "f3TQEpL7dk4": {"duration": 640, "path": "khan/test-prep/gmat/problem-solving/gmat-math-17/", "keywords": "gmat, math, problem, solving", "id": "f3TQEpL7dk4", "title": "GMAT: Math 17", "description": "92-95, pg. 164", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/f3TQEpL7dk4.mp4/f3TQEpL7dk4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/f3TQEpL7dk4.mp4/f3TQEpL7dk4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/f3TQEpL7dk4.m3u8/f3TQEpL7dk4.m3u8"}, "slug": "gmat-math-17", "video_id": "f3TQEpL7dk4", "youtube_id": "f3TQEpL7dk4", "readable_id": "gmat-math-17"}, "d4FklnPgjv8": {"duration": 139, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-9/", "keywords": "", "id": "d4FklnPgjv8", "title": "9 quadrilateral area", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d4FklnPgjv8.mp4/d4FklnPgjv8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d4FklnPgjv8.mp4/d4FklnPgjv8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d4FklnPgjv8.m3u8/d4FklnPgjv8.m3u8"}, "slug": "sat-2010-may-9-9", "video_id": "d4FklnPgjv8", "youtube_id": "d4FklnPgjv8", "readable_id": "sat-2010-may-9-9"}, "3mier94pbnU": {"duration": 591, "path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/work-and-energy-part-2/", "keywords": "physics, potential, kinetic, energy, work", "id": "3mier94pbnU", "title": "Work and energy (part 2)", "description": "More on work. Introduction to Kinetic and Potential Energies.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3mier94pbnU.mp4/3mier94pbnU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3mier94pbnU.mp4/3mier94pbnU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3mier94pbnU.m3u8/3mier94pbnU.m3u8"}, "slug": "work-and-energy-part-2", "video_id": "3mier94pbnU", "youtube_id": "3mier94pbnU", "readable_id": "work-and-energy-part-2"}, "EX1eFeaTiYM": {"duration": 411, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/hedge-fund-structure-and-fees/", "keywords": "hedge, fund, accounting", "id": "EX1eFeaTiYM", "title": "Hedge fund structure and fees", "description": "Understanding how hedge funds are structured and how the managers get paid", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EX1eFeaTiYM.mp4/EX1eFeaTiYM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EX1eFeaTiYM.mp4/EX1eFeaTiYM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EX1eFeaTiYM.m3u8/EX1eFeaTiYM.m3u8"}, "slug": "hedge-fund-structure-and-fees", "video_id": "EX1eFeaTiYM", "youtube_id": "EX1eFeaTiYM", "readable_id": "hedge-fund-structure-and-fees"}, "wlB0x9W-qBU": {"duration": 598, "path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/deriving-displacement-as-a-function-of-time-acceleration-and-initial-velocity/", "keywords": "physics, distance, speed, kinematics, formula", "id": "wlB0x9W-qBU", "title": "Deriving displacement as a function of time, acceleration, and initial velocity", "description": "Deriving displacement as a function of time, constant acceleration and initial velocity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wlB0x9W-qBU.mp4/wlB0x9W-qBU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wlB0x9W-qBU.mp4/wlB0x9W-qBU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wlB0x9W-qBU.m3u8/wlB0x9W-qBU.m3u8"}, "slug": "deriving-displacement-as-a-function-of-time-acceleration-and-initial-velocity", "video_id": "wlB0x9W-qBU", "youtube_id": "wlB0x9W-qBU", "readable_id": "deriving-displacement-as-a-function-of-time-acceleration-and-initial-velocity"}, "ryJvNEHcuDg": {"duration": 672, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/newman-projections-2/", "keywords": "Newman, Projections", "id": "ryJvNEHcuDg", "title": "Newman projections 2", "description": "Newman Projections 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ryJvNEHcuDg.mp4/ryJvNEHcuDg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ryJvNEHcuDg.mp4/ryJvNEHcuDg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ryJvNEHcuDg.m3u8/ryJvNEHcuDg.m3u8"}, "slug": "newman-projections-2", "video_id": "ryJvNEHcuDg", "youtube_id": "ryJvNEHcuDg", "readable_id": "newman-projections-2"}, "W-itq-SYw0I": {"duration": 400, "path": "khan/math/geometry/similarity/similarity-and-transformations/quadrilateral-similarity-by-showing-congruent-angles/", "keywords": "", "id": "W-itq-SYw0I", "title": "Quadrilateral similarity by showing congruent angles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W-itq-SYw0I.mp4/W-itq-SYw0I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W-itq-SYw0I.mp4/W-itq-SYw0I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W-itq-SYw0I.m3u8/W-itq-SYw0I.m3u8"}, "slug": "quadrilateral-similarity-by-showing-congruent-angles", "video_id": "W-itq-SYw0I", "youtube_id": "W-itq-SYw0I", "readable_id": "quadrilateral-similarity-by-showing-congruent-angles"}, "01c12NaUQDw": {"duration": 168, "path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverse-of-a-2x2-matrix/", "keywords": "", "id": "01c12NaUQDw", "title": "Inverse of a 2x2 matrix", "description": "Example of calculating the inverse of a 2x2 matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/01c12NaUQDw.mp4/01c12NaUQDw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/01c12NaUQDw.mp4/01c12NaUQDw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/01c12NaUQDw.m3u8/01c12NaUQDw.m3u8"}, "slug": "inverse-of-a-2x2-matrix", "video_id": "01c12NaUQDw", "youtube_id": "01c12NaUQDw", "readable_id": "inverse-of-a-2x2-matrix"}, "o3Ym-tAtCvc": {"duration": 123, "path": "khan/partner-content/big-history-project/early-humans/collective-learning/bhp-collective-learning-at-scale/", "keywords": "", "id": "o3Ym-tAtCvc", "title": "Collective Learning at Scale", "description": "Learn why humans, more than any other species, have made such a profound impression on the biosphere.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o3Ym-tAtCvc.mp4/o3Ym-tAtCvc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o3Ym-tAtCvc.mp4/o3Ym-tAtCvc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o3Ym-tAtCvc.m3u8/o3Ym-tAtCvc.m3u8"}, "slug": "bhp-collective-learning-at-scale", "video_id": "o3Ym-tAtCvc", "youtube_id": "o3Ym-tAtCvc", "readable_id": "bhp-collective-learning-at-scale"}, "bwwmq2be1So": {"duration": 114, "path": "khan/partner-content/pixar/rendering/rendering1/render-4/", "keywords": "", "id": "bwwmq2be1So", "title": "4. Rendering Mike Wazowski", "description": "Case study from Monsters University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bwwmq2be1So.mp4/bwwmq2be1So.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bwwmq2be1So.mp4/bwwmq2be1So.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bwwmq2be1So.m3u8/bwwmq2be1So.m3u8"}, "slug": "render-4", "video_id": "bwwmq2be1So", "youtube_id": "bwwmq2be1So", "readable_id": "render-4"}, "eJUGoAtF-7A": {"duration": 222, "path": "khan/math/differential-calculus/taking-derivatives/product_rule/quotient-rule-for-derivative-of-tan-x/", "keywords": "", "id": "eJUGoAtF-7A", "title": "Quotient rule for derivative of tan x", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eJUGoAtF-7A.mp4/eJUGoAtF-7A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eJUGoAtF-7A.mp4/eJUGoAtF-7A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eJUGoAtF-7A.m3u8/eJUGoAtF-7A.m3u8"}, "slug": "quotient-rule-for-derivative-of-tan-x", "video_id": "eJUGoAtF-7A", "youtube_id": "eJUGoAtF-7A", "readable_id": "quotient-rule-for-derivative-of-tan-x"}, "QH3kj7aeXHc": {"duration": 80, "path": "khan/partner-content/exploratorium/light-and-color/soap-film-on-can/soap-film-build/", "keywords": "", "id": "QH3kj7aeXHc", "title": "Create your soap film viewer: Materials, tools, and steps", "description": "Here are all the materials and instructions you'll need to experiment with soap film on your own.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QH3kj7aeXHc.mp4/QH3kj7aeXHc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QH3kj7aeXHc.mp4/QH3kj7aeXHc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QH3kj7aeXHc.m3u8/QH3kj7aeXHc.m3u8"}, "slug": "soap-film-build", "video_id": "QH3kj7aeXHc", "youtube_id": "QH3kj7aeXHc", "readable_id": "soap-film-build"}, "OhAAi3DZ984": {"duration": 544, "path": "khan/science/organic-chemistry/organic-structures/acid-base-review/using-a-pka-table/", "keywords": "", "id": "OhAAi3DZ984", "title": "Using a pKa table", "description": "How to use a pKa table to determine relative acid strengths", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OhAAi3DZ984.mp4/OhAAi3DZ984.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OhAAi3DZ984.mp4/OhAAi3DZ984.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OhAAi3DZ984.m3u8/OhAAi3DZ984.m3u8"}, "slug": "using-a-pka-table", "video_id": "OhAAi3DZ984", "youtube_id": "OhAAi3DZ984", "readable_id": "using-a-pka-table"}, "jXJpbpvcMDU": {"duration": 211, "path": "khan/humanities/global-culture/global-art-architecture/zarina-hashmi/", "keywords": "Tate", "id": "jXJpbpvcMDU", "title": "Zarina Hashmi", "description": "This video brought to you by Tate.org.uk\n\nZarina Hashmi left India in 1958. Around the same time, her family were subject to relocation from Delhi to Karachi following the partition of India and Pakistan. As a result, exile and the loss of the family home are embedded in her work, which often evokes physical and psychological spaces relating to memories of childhood and later life. Hear the artist speak about her piece Letters from Home\u00a0(2004), a set of woodcuts in which handwritten letters from her sister Rani are overlaid by maps and floorplans that represent the artist's travels and places where she has lived, exploring the relationship with her native language and origins.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jXJpbpvcMDU.mp4/jXJpbpvcMDU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jXJpbpvcMDU.mp4/jXJpbpvcMDU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jXJpbpvcMDU.m3u8/jXJpbpvcMDU.m3u8"}, "slug": "zarina-hashmi", "video_id": "jXJpbpvcMDU", "youtube_id": "jXJpbpvcMDU", "readable_id": "zarina-hashmi"}, "fvC0dm2wzIo": {"duration": 664, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/horizontal-vertical-asymptotes/", "keywords": "", "id": "fvC0dm2wzIo", "title": "How to graph a rational function (example)", "description": "Sal graphs f(x)=(2x+10)/(5x-15).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fvC0dm2wzIo.mp4/fvC0dm2wzIo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fvC0dm2wzIo.mp4/fvC0dm2wzIo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fvC0dm2wzIo.m3u8/fvC0dm2wzIo.m3u8"}, "slug": "horizontal-vertical-asymptotes", "video_id": "fvC0dm2wzIo", "youtube_id": "fvC0dm2wzIo", "readable_id": "horizontal-vertical-asymptotes"}, "DvYs1HILq1g": {"duration": 664, "path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/introduction-to-oxidation-and-reduction/", "keywords": "", "id": "DvYs1HILq1g", "title": "Oxidation and reduction", "description": "Introducing oxidation states, oxidation, and reduction. Some tips for remembering oxidation and reduction.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DvYs1HILq1g.mp4/DvYs1HILq1g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DvYs1HILq1g.mp4/DvYs1HILq1g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DvYs1HILq1g.m3u8/DvYs1HILq1g.m3u8"}, "slug": "introduction-to-oxidation-and-reduction", "video_id": "DvYs1HILq1g", "youtube_id": "DvYs1HILq1g", "readable_id": "introduction-to-oxidation-and-reduction"}, "nLY2bzRfQyo": {"duration": 334, "path": "khan/math/pre-algebra/measurement/perimeter/comparing-area-and-perimeter/", "keywords": "", "id": "nLY2bzRfQyo", "title": "Comparing areas and perimeters of rectangles", "description": "Compare the areas and perimeters of rectangles to a given rectangle.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nLY2bzRfQyo.mp4/nLY2bzRfQyo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nLY2bzRfQyo.mp4/nLY2bzRfQyo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nLY2bzRfQyo.m3u8/nLY2bzRfQyo.m3u8"}, "slug": "comparing-area-and-perimeter", "video_id": "nLY2bzRfQyo", "youtube_id": "nLY2bzRfQyo", "readable_id": "comparing-area-and-perimeter"}, "y5aFEfFwsLQ": {"duration": 144, "path": "khan/partner-content/pixar/rendering/rendering1/rendering-3/", "keywords": "", "id": "y5aFEfFwsLQ", "title": "3. Light rays", "description": "Let's look more closely at how light bounces when it strikes an object. We'll cover reflected and refracted rays.\nClick here for more detail on refraction!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y5aFEfFwsLQ.mp4/y5aFEfFwsLQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y5aFEfFwsLQ.mp4/y5aFEfFwsLQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y5aFEfFwsLQ.m3u8/y5aFEfFwsLQ.m3u8"}, "slug": "rendering-3", "video_id": "y5aFEfFwsLQ", "youtube_id": "y5aFEfFwsLQ", "readable_id": "rendering-3"}, "0c7dt2SQfLw": {"duration": 601, "path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-3x3-determinant/", "keywords": "determinant", "id": "0c7dt2SQfLw", "title": "3 x 3 determinant", "description": "Determinants: Finding the determinant of a 3x3 matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0c7dt2SQfLw.mp4/0c7dt2SQfLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0c7dt2SQfLw.mp4/0c7dt2SQfLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0c7dt2SQfLw.m3u8/0c7dt2SQfLw.m3u8"}, "slug": "linear-algebra-3x3-determinant", "video_id": "0c7dt2SQfLw", "youtube_id": "0c7dt2SQfLw", "readable_id": "linear-algebra-3x3-determinant"}, "qk-9Ez3xICY": {"duration": 181, "path": "khan/humanities/art-asia/south-asia/buddhist-art2/bodh-gaya/", "keywords": "", "id": "qk-9Ez3xICY", "title": "Bodh Gaya: center of the Buddhist world", "description": "Discover Bodh Gaya, one of several sights in India associated with the birth of Buddhism. Learn more about Bodh Gaya on the education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qk-9Ez3xICY.mp4/qk-9Ez3xICY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qk-9Ez3xICY.mp4/qk-9Ez3xICY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qk-9Ez3xICY.m3u8/qk-9Ez3xICY.m3u8"}, "slug": "bodh-gaya", "video_id": "qk-9Ez3xICY", "youtube_id": "qk-9Ez3xICY", "readable_id": "bodh-gaya"}, "bJF9R8_-0O0": {"duration": 61, "path": "khan/math/basic-geo/basic-geo-lines/basic-geo-measuring-segments/congruent-segments/", "keywords": "", "id": "bJF9R8_-0O0", "title": "Congruent line segments", "description": "Let's take line segments a little further. How do we know if line segments are congruent? Let's watch this example of counting points to see if they have the exact same length.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bJF9R8_-0O0.mp4/bJF9R8_-0O0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bJF9R8_-0O0.mp4/bJF9R8_-0O0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bJF9R8_-0O0.m3u8/bJF9R8_-0O0.m3u8"}, "slug": "congruent-segments", "video_id": "bJF9R8_-0O0", "youtube_id": "bJF9R8_-0O0", "readable_id": "congruent-segments"}, "sXOIIEZh6qg": {"duration": 401, "path": "khan/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula/another-mass-composition-problem/", "keywords": "empirical, formula, chemistry, science, mole", "id": "sXOIIEZh6qg", "title": "Another mass composition problem", "description": "Another exercise converting a mass composition to an empirical formula.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sXOIIEZh6qg.mp4/sXOIIEZh6qg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sXOIIEZh6qg.mp4/sXOIIEZh6qg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sXOIIEZh6qg.m3u8/sXOIIEZh6qg.m3u8"}, "slug": "another-mass-composition-problem", "video_id": "sXOIIEZh6qg", "youtube_id": "sXOIIEZh6qg", "readable_id": "another-mass-composition-problem"}, "TXGhMDbbnzQ": {"duration": 534, "path": "khan/math/probability/statistical-studies/categorical-data/analyzing-trends-categorical-data/", "keywords": "", "id": "TXGhMDbbnzQ", "title": "Analyzing trends in categorical data", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TXGhMDbbnzQ.mp4/TXGhMDbbnzQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TXGhMDbbnzQ.mp4/TXGhMDbbnzQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TXGhMDbbnzQ.m3u8/TXGhMDbbnzQ.m3u8"}, "slug": "analyzing-trends-categorical-data", "video_id": "TXGhMDbbnzQ", "youtube_id": "TXGhMDbbnzQ", "readable_id": "analyzing-trends-categorical-data"}, "a-e8fzqv3CE": {"duration": 199, "path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/re-visual-multiplication-and-48-2-9-3/", "keywords": "mathematics, multiplication", "id": "a-e8fzqv3CE", "title": "Re: Visual multiplication and 48/2(9+3)", "description": "A quick response to some mathy things going around.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a-e8fzqv3CE.mp4/a-e8fzqv3CE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a-e8fzqv3CE.mp4/a-e8fzqv3CE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a-e8fzqv3CE.m3u8/a-e8fzqv3CE.m3u8"}, "slug": "re-visual-multiplication-and-48-2-9-3", "video_id": "a-e8fzqv3CE", "youtube_id": "a-e8fzqv3CE", "readable_id": "re-visual-multiplication-and-48-2-9-3"}, "73eSiVcg4tQ": {"duration": 459, "path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-1-b-c/", "keywords": "vector, AP", "id": "73eSiVcg4tQ", "title": "2011 Calculus BC free response #1 (b & c)", "description": "Position and slope of particle's path at a given time", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/73eSiVcg4tQ.mp4/73eSiVcg4tQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/73eSiVcg4tQ.mp4/73eSiVcg4tQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/73eSiVcg4tQ.m3u8/73eSiVcg4tQ.m3u8"}, "slug": "2011-calculus-bc-free-response-1-b-c", "video_id": "73eSiVcg4tQ", "youtube_id": "73eSiVcg4tQ", "readable_id": "2011-calculus-bc-free-response-1-b-c"}, "xaz5ftvZCyI": {"duration": 667, "path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/review-of-b-cells-cd4-t-cells-and-cd8-t-cells/", "keywords": "plasma, cell, helper, effector, memory, cytotoxic", "id": "xaz5ftvZCyI", "title": "Review of B cells, CD4+ T cells and CD8+ T cells", "description": "Review of B cells, CD4+ T cells and CD8+ T cells", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xaz5ftvZCyI.mp4/xaz5ftvZCyI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xaz5ftvZCyI.mp4/xaz5ftvZCyI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xaz5ftvZCyI.m3u8/xaz5ftvZCyI.m3u8"}, "slug": "review-of-b-cells-cd4-t-cells-and-cd8-t-cells", "video_id": "xaz5ftvZCyI", "youtube_id": "xaz5ftvZCyI", "readable_id": "review-of-b-cells-cd4-t-cells-and-cd8-t-cells"}, "h72iwhmB6zc": {"duration": 598, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/end-diastolic-pressure-volume-relationship-edpvr/", "keywords": "", "id": "h72iwhmB6zc", "title": "End diastolic pressure-volume relationship (EDPVR)", "description": "Find out what happens when the left ventricle is not allowed to contract, and instead you simply add and take away blood from it. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h72iwhmB6zc.mp4/h72iwhmB6zc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h72iwhmB6zc.mp4/h72iwhmB6zc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h72iwhmB6zc.m3u8/h72iwhmB6zc.m3u8"}, "slug": "end-diastolic-pressure-volume-relationship-edpvr", "video_id": "h72iwhmB6zc", "youtube_id": "h72iwhmB6zc", "readable_id": "end-diastolic-pressure-volume-relationship-edpvr"}, "hk_21n8ITqg": {"duration": 685, "path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-34/", "keywords": "crash course", "id": "hk_21n8ITqg", "title": "Samurai, Daimyo, Matthew Perry, and Nationalism", "description": "In which John Green teaches you about Nationalism. Nationalism was everywhere in the 19th century, as people all over the world carved new nation-states out of old empires. Nationalist leaders changed the way people thought of themselves and the places they lived by reinventing education, military service, and the relationship between government and governed. In Japan, the traditional feudal society underwent a long transformation over the course of about 300 years to become a modern nation-state. John follows the course of Japanese history from the emergence of the Tokugawa Shogunate to the Meiji Restoration, and covers Nationalism in many other countries along the way. All this, plus a special guest appearance, plus the return of an old friend on a extra-special episode of Crash Course.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hk_21n8ITqg.mp4/hk_21n8ITqg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hk_21n8ITqg.mp4/hk_21n8ITqg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hk_21n8ITqg.m3u8/hk_21n8ITqg.m3u8"}, "slug": "crash-course-world-history-34", "video_id": "hk_21n8ITqg", "youtube_id": "hk_21n8ITqg", "readable_id": "crash-course-world-history-34"}, "-h3Oqhl8fPg": {"duration": 627, "path": "khan/math/arithmetic/multiplication-division/multi_digit_multiplication/multiplication-6-multiple-digit-numbers/", "keywords": "multiplication", "id": "-h3Oqhl8fPg", "title": "Multiplying multiple digit numbers", "description": "Working our way up to multiplying multiple-digit numbers with each other. We'll go slow so you can follow along.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-h3Oqhl8fPg.mp4/-h3Oqhl8fPg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-h3Oqhl8fPg.mp4/-h3Oqhl8fPg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-h3Oqhl8fPg.m3u8/-h3Oqhl8fPg.m3u8"}, "slug": "multiplication-6-multiple-digit-numbers", "video_id": "-h3Oqhl8fPg", "youtube_id": "-h3Oqhl8fPg", "readable_id": "multiplication-6-multiple-digit-numbers"}, "2DI_X16I4-s": {"duration": 895, "path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/how-does-the-body-adapt-to-starvation/", "keywords": "", "id": "2DI_X16I4-s", "title": "How does the body adapt to starvation?", "description": "1D: How does the body utilize the major energy storage fuels? What are ketones? Why can't fatty acids be converted to glucose?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2DI_X16I4-s.mp4/2DI_X16I4-s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2DI_X16I4-s.mp4/2DI_X16I4-s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2DI_X16I4-s.m3u8/2DI_X16I4-s.m3u8"}, "slug": "how-does-the-body-adapt-to-starvation", "video_id": "2DI_X16I4-s", "youtube_id": "2DI_X16I4-s", "readable_id": "how-does-the-body-adapt-to-starvation"}, "cuwMrVoG2V8": {"duration": 626, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/why-doesn-t-the-heart-rip/", "keywords": "", "id": "cuwMrVoG2V8", "title": "Why doesn't the heart rip?", "description": "Understand LaPlace's law to see the effect that pressure, radius, and wall thickness each have on the \"wall stress\" in the left ventricle. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cuwMrVoG2V8.mp4/cuwMrVoG2V8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cuwMrVoG2V8.mp4/cuwMrVoG2V8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cuwMrVoG2V8.m3u8/cuwMrVoG2V8.m3u8"}, "slug": "why-doesn-t-the-heart-rip", "video_id": "cuwMrVoG2V8", "youtube_id": "cuwMrVoG2V8", "readable_id": "why-doesn-t-the-heart-rip"}, "12Rvts2NR7M": {"duration": 746, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-sal/comparing-e2-e1-sn2-sn1-reactions/", "keywords": "Comparing, E2, E1, Sn2, Sn1, Reactions, organic, chemistry", "id": "12Rvts2NR7M", "title": "Comparing E2, E1, Sn2, Sn1 reactions", "description": "Comparing E2 E1 Sn2 Sn1 Reactions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/12Rvts2NR7M.mp4/12Rvts2NR7M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/12Rvts2NR7M.mp4/12Rvts2NR7M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/12Rvts2NR7M.m3u8/12Rvts2NR7M.m3u8"}, "slug": "comparing-e2-e1-sn2-sn1-reactions", "video_id": "12Rvts2NR7M", "youtube_id": "12Rvts2NR7M", "readable_id": "comparing-e2-e1-sn2-sn1-reactions"}, "g8sxNa-E-H0": {"duration": 670, "path": "khan/humanities/history/euro-hist/middle-east-20th-century/theodor-herzl-and-the-birth-of-political-zionism/", "keywords": "", "id": "g8sxNa-E-H0", "title": "Theodor Herzl and the birth of political Zionism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g8sxNa-E-H0.mp4/g8sxNa-E-H0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g8sxNa-E-H0.mp4/g8sxNa-E-H0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g8sxNa-E-H0.m3u8/g8sxNa-E-H0.m3u8"}, "slug": "theodor-herzl-and-the-birth-of-political-zionism", "video_id": "g8sxNa-E-H0", "youtube_id": "g8sxNa-E-H0", "readable_id": "theodor-herzl-and-the-birth-of-political-zionism"}, "AFF8FXxt5os": {"duration": 692, "path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/using-a-line-integral-to-find-the-work-done-by-a-vector-field-example/", "keywords": "line, integral, work, vector, field, example", "id": "AFF8FXxt5os", "title": "Using a line integral to find the work done by a vector field example", "description": "Using a line integral to find the work done by a vector field example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AFF8FXxt5os.mp4/AFF8FXxt5os.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AFF8FXxt5os.mp4/AFF8FXxt5os.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AFF8FXxt5os.m3u8/AFF8FXxt5os.m3u8"}, "slug": "using-a-line-integral-to-find-the-work-done-by-a-vector-field-example", "video_id": "AFF8FXxt5os", "youtube_id": "AFF8FXxt5os", "readable_id": "using-a-line-integral-to-find-the-work-done-by-a-vector-field-example"}, "gibe5vJfq5w": {"duration": 205, "path": "khan/humanities/art-asia/art-japan/nara-period/brahma-and-indra/", "keywords": "", "id": "gibe5vJfq5w", "title": "Standing Brahma and standing Indra", "description": "Brahma and Indra, or Bonten and Taishakuten as they are known in Japanese, were Hindu deities brought into Buddhism as attendants of the Buddha or of bodhisattvas. The Asian Art Museum's Bonten and Taishakuten are the only large-scale, matched Japanese hollow dry lacquer sculptures from the Nara period in a U.S. collection. Even in Japan, sculptures like these are extremely rare and most have been designated as National Treasures or Important Cultural Properties. Learn more about the Hindu deity Brahma.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gibe5vJfq5w.mp4/gibe5vJfq5w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gibe5vJfq5w.mp4/gibe5vJfq5w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gibe5vJfq5w.m3u8/gibe5vJfq5w.m3u8"}, "slug": "brahma-and-indra", "video_id": "gibe5vJfq5w", "youtube_id": "gibe5vJfq5w", "readable_id": "brahma-and-indra"}, "cc8sUv2SuaY": {"duration": 1118, "path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/the-kidney-and-nephron/", "keywords": "renal, kidney, nephron", "id": "cc8sUv2SuaY", "title": "The kidney and nephron", "description": "Overview of how the nephrons in the kidney filter blood and reabsorb water and other molecules.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cc8sUv2SuaY.mp4/cc8sUv2SuaY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cc8sUv2SuaY.mp4/cc8sUv2SuaY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cc8sUv2SuaY.m3u8/cc8sUv2SuaY.m3u8"}, "slug": "the-kidney-and-nephron", "video_id": "cc8sUv2SuaY", "youtube_id": "cc8sUv2SuaY", "readable_id": "the-kidney-and-nephron"}, "wUNWjd4bMmw": {"duration": 375, "path": "khan/math/algebra2/manipulating-functions/composing-functions/function-composition/", "keywords": "", "id": "wUNWjd4bMmw", "title": "Introduction to function composition", "description": "Sal explains what it means to compose two functions. He gives examples for finding the values of composite functions given the equations, the graphs, or tables of values of the two composed functions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wUNWjd4bMmw.mp4/wUNWjd4bMmw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wUNWjd4bMmw.mp4/wUNWjd4bMmw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wUNWjd4bMmw.m3u8/wUNWjd4bMmw.m3u8"}, "slug": "function-composition", "video_id": "wUNWjd4bMmw", "youtube_id": "wUNWjd4bMmw", "readable_id": "function-composition"}, "w49ddHSDGUA": {"duration": 168, "path": "khan/math/early-math/cc-early-math-measure-data-topic/cc-early-picture-graphs/picture-graphs/", "keywords": "", "id": "w49ddHSDGUA", "title": "Picture graphs", "description": "Read and interpret a picture graph.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w49ddHSDGUA.mp4/w49ddHSDGUA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w49ddHSDGUA.mp4/w49ddHSDGUA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w49ddHSDGUA.m3u8/w49ddHSDGUA.m3u8"}, "slug": "picture-graphs", "video_id": "w49ddHSDGUA", "youtube_id": "w49ddHSDGUA", "readable_id": "picture-graphs"}, "OZ9IP0xeQho": {"duration": 453, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/defining-aids-and-aids-defining-illnesses-bumper/", "keywords": "AIDS-defining Clinical Condition,AIDS (Disease Or Medical Condition),Health (Industry)", "id": "OZ9IP0xeQho", "title": "Defining AIDS and AIDS defining illnesses", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OZ9IP0xeQho.mp4/OZ9IP0xeQho.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OZ9IP0xeQho.mp4/OZ9IP0xeQho.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OZ9IP0xeQho.m3u8/OZ9IP0xeQho.m3u8"}, "slug": "defining-aids-and-aids-defining-illnesses-bumper", "video_id": "OZ9IP0xeQho", "youtube_id": "OZ9IP0xeQho", "readable_id": "defining-aids-and-aids-defining-illnesses-bumper"}, "vv6WBeqw2Nc": {"duration": 603, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/calcium-puts-myosin-to-work/", "keywords": "calcium, myosin", "id": "vv6WBeqw2Nc", "title": "Calcium puts myosin to work", "description": "See exactly how Calcium binds Troponin-C and allows Myosin to do some work.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vv6WBeqw2Nc.mp4/vv6WBeqw2Nc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vv6WBeqw2Nc.mp4/vv6WBeqw2Nc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vv6WBeqw2Nc.m3u8/vv6WBeqw2Nc.m3u8"}, "slug": "calcium-puts-myosin-to-work", "video_id": "vv6WBeqw2Nc", "youtube_id": "vv6WBeqw2Nc", "readable_id": "calcium-puts-myosin-to-work"}, "AGFO-ROxH_I": {"duration": 484, "path": "khan/math/algebra/introduction-to-algebra/units-algebra/converting-units-of-length/", "keywords": "U06_L1_T1_we3, Converting, units, of, length, CC_4_MD_1, CC_5_MD_1, CC_6_RP_3_d", "id": "AGFO-ROxH_I", "title": "Unit measurement word problem: running laps (US customary)", "description": "Remember that it's always easier to convert everything to like units before tackling a unit conversion word problem. That way your comparing apples to apples. Go for it...we'll explain as we work through it!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AGFO-ROxH_I.mp4/AGFO-ROxH_I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AGFO-ROxH_I.mp4/AGFO-ROxH_I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AGFO-ROxH_I.m3u8/AGFO-ROxH_I.m3u8"}, "slug": "converting-units-of-length", "video_id": "AGFO-ROxH_I", "youtube_id": "AGFO-ROxH_I", "readable_id": "converting-units-of-length"}, "6JQNEww5DF8": {"duration": 95, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-11/", "keywords": "", "id": "6JQNEww5DF8", "title": "12 Equivalent expressions", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6JQNEww5DF8.mp4/6JQNEww5DF8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6JQNEww5DF8.mp4/6JQNEww5DF8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6JQNEww5DF8.m3u8/6JQNEww5DF8.m3u8"}, "slug": "sat-2010-may-6-11", "video_id": "6JQNEww5DF8", "youtube_id": "6JQNEww5DF8", "readable_id": "sat-2010-may-6-11"}, "u00I3MCrspU": {"duration": 237, "path": "khan/math/precalculus/precalc-matrices/inverting_matrices/finding-the-determinant-of-a-3x3-matrix-method-2/", "keywords": "", "id": "u00I3MCrspU", "title": "Finding the determinant of a 3x3 matrix method 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u00I3MCrspU.mp4/u00I3MCrspU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u00I3MCrspU.mp4/u00I3MCrspU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u00I3MCrspU.m3u8/u00I3MCrspU.m3u8"}, "slug": "finding-the-determinant-of-a-3x3-matrix-method-2", "video_id": "u00I3MCrspU", "youtube_id": "u00I3MCrspU", "readable_id": "finding-the-determinant-of-a-3x3-matrix-method-2"}, "iHBz77E625o": {"duration": 19, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/penny-battery/penny-battery-wow/", "keywords": "penny, battery, LED, Exploratorium", "id": "iHBz77E625o", "title": "Penny battery introduction", "description": "You can make a simple battery, powerful enough to light an LED, with the change in your pockets!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iHBz77E625o.mp4/iHBz77E625o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iHBz77E625o.mp4/iHBz77E625o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iHBz77E625o.m3u8/iHBz77E625o.m3u8"}, "slug": "penny-battery-wow", "video_id": "iHBz77E625o", "youtube_id": "iHBz77E625o", "readable_id": "penny-battery-wow"}, "lCsjJbZHhHU": {"duration": 381, "path": "khan/math/linear-algebra/vectors_and_spaces/vectors/real-coordinate-spaces/", "keywords": "", "id": "lCsjJbZHhHU", "title": "Real coordinate spaces", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lCsjJbZHhHU.mp4/lCsjJbZHhHU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lCsjJbZHhHU.mp4/lCsjJbZHhHU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lCsjJbZHhHU.m3u8/lCsjJbZHhHU.m3u8"}, "slug": "real-coordinate-spaces", "video_id": "lCsjJbZHhHU", "youtube_id": "lCsjJbZHhHU", "readable_id": "real-coordinate-spaces"}, "ah39bUxYDEg": {"duration": 343, "path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-17-19/", "keywords": "CAHSEE, practice, california, high, school, exit, examination", "id": "ah39bUxYDEg", "title": "CAHSEE practice: Problems 17-19", "description": "CAHSEE Practice: Problems 17-19", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ah39bUxYDEg.mp4/ah39bUxYDEg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ah39bUxYDEg.mp4/ah39bUxYDEg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ah39bUxYDEg.m3u8/ah39bUxYDEg.m3u8"}, "slug": "cahsee-practice-problems-17-19", "video_id": "ah39bUxYDEg", "youtube_id": "ah39bUxYDEg", "readable_id": "cahsee-practice-problems-17-19"}, "PZQTxPbvO64": {"duration": 166, "path": "khan/humanities/art-asia/imperial-china/liao-dynasty/divinity/", "keywords": "belief, body, calm, ceramic, sculpture, transcendence, Asia", "id": "PZQTxPbvO64", "title": "Arhat (Luohan)", "description": "Met curator Denise Leidy on ugliness and divinity in Arhat (Luohan) dating from China\u2019s Liao dynasty, \u00a0c. 1000.\u00a0\n\nThis nearly life-size sculpture and its companion piece\u00a0are part of a group of about sixteen works that have been known in the West since 1913. They are thought to have come from a cave in Yixian, in Hebei province, and they represent arhats (or luohans, as they are known in China). Arhats were thought to have achieved an advanced (although not perfected) state of spiritual development, and they eventually became recognized as protectors of Buddhism. Both works are justifiably acclaimed as masterpieces of ceramic sculpture, both for their size and for the quality of their glaze, a three-toned or colored glaze known as sancai. The discovery of an ancient kiln in a village near Beijing in 1983 and its subsequent excavation in 1985 yielded much information that could be used to date these extraordinary sculptures. It seems reasonable, therefore, to date the more technically challenging, life-size works slightly later, probably to the late tenth or eleventh century.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, try this and also visit Find and educator resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PZQTxPbvO64.mp4/PZQTxPbvO64.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PZQTxPbvO64.mp4/PZQTxPbvO64.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PZQTxPbvO64.m3u8/PZQTxPbvO64.m3u8"}, "slug": "divinity", "video_id": "PZQTxPbvO64", "youtube_id": "PZQTxPbvO64", "readable_id": "divinity"}, "bAU1MLRwh7c": {"duration": 228, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/back-of-envelope-office-space-conundrum/", "keywords": "finance, lease", "id": "bAU1MLRwh7c", "title": "Back-of-envelope office space conundrum", "description": "Back of the envelope calculation of which office space to rent", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bAU1MLRwh7c.mp4/bAU1MLRwh7c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bAU1MLRwh7c.mp4/bAU1MLRwh7c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bAU1MLRwh7c.m3u8/bAU1MLRwh7c.m3u8"}, "slug": "back-of-envelope-office-space-conundrum", "video_id": "bAU1MLRwh7c", "youtube_id": "bAU1MLRwh7c", "readable_id": "back-of-envelope-office-space-conundrum"}, "kOTdVMM9Lwg": {"duration": 291, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/laryngomalacia/", "keywords": "", "id": "kOTdVMM9Lwg", "title": "Laryngomalacia", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kOTdVMM9Lwg.mp4/kOTdVMM9Lwg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kOTdVMM9Lwg.mp4/kOTdVMM9Lwg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kOTdVMM9Lwg.m3u8/kOTdVMM9Lwg.m3u8"}, "slug": "laryngomalacia", "video_id": "kOTdVMM9Lwg", "youtube_id": "kOTdVMM9Lwg", "readable_id": "laryngomalacia"}, "DrRsXhln4S8": {"duration": 192, "path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof/divergence-theorem-proof-part-5/", "keywords": "", "id": "DrRsXhln4S8", "title": "Divergence theorem proof (part 5)", "description": "Home stretch. Proving the Type I part", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DrRsXhln4S8.mp4/DrRsXhln4S8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DrRsXhln4S8.mp4/DrRsXhln4S8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DrRsXhln4S8.m3u8/DrRsXhln4S8.m3u8"}, "slug": "divergence-theorem-proof-part-5", "video_id": "DrRsXhln4S8", "youtube_id": "DrRsXhln4S8", "readable_id": "divergence-theorem-proof-part-5"}, "Yp0EhcVBxNU": {"duration": 196, "path": "khan/math/precalculus/vectors-precalc/vector-basic/classifying-vectors-and-quantities-example/", "keywords": "", "id": "Yp0EhcVBxNU", "title": "Classifying vectors and quantities example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Yp0EhcVBxNU.mp4/Yp0EhcVBxNU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Yp0EhcVBxNU.mp4/Yp0EhcVBxNU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Yp0EhcVBxNU.m3u8/Yp0EhcVBxNU.m3u8"}, "slug": "classifying-vectors-and-quantities-example", "video_id": "Yp0EhcVBxNU", "youtube_id": "Yp0EhcVBxNU", "readable_id": "classifying-vectors-and-quantities-example"}, "AmOO4j0E408": {"duration": 782, "path": "khan/science/biology/her/heredity-and-genetics/dna-deoxyribonucleic-acid/", "keywords": "", "id": "AmOO4j0E408", "title": "DNA", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AmOO4j0E408.mp4/AmOO4j0E408.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AmOO4j0E408.mp4/AmOO4j0E408.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AmOO4j0E408.m3u8/AmOO4j0E408.m3u8"}, "slug": "dna-deoxyribonucleic-acid", "video_id": "AmOO4j0E408", "youtube_id": "AmOO4j0E408", "readable_id": "dna-deoxyribonucleic-acid"}, "vKMNRcctwL4": {"duration": 973, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-13/", "keywords": "probability, map, aime", "id": "vKMNRcctwL4", "title": "2003 AIME II problem 13", "description": "Probability of moving to a vertex", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vKMNRcctwL4.mp4/vKMNRcctwL4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vKMNRcctwL4.mp4/vKMNRcctwL4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vKMNRcctwL4.m3u8/vKMNRcctwL4.m3u8"}, "slug": "2003-aime-ii-problem-13", "video_id": "vKMNRcctwL4", "youtube_id": "vKMNRcctwL4", "readable_id": "2003-aime-ii-problem-13"}, "fucyI7Ouj2c": {"duration": 907, "path": "khan/test-prep/mcat/chemical-processes/thermochemistry/enthalpy/", "keywords": "enthalpy, thermodynamics, chemistry", "id": "fucyI7Ouj2c", "title": "Enthalpy", "description": "Understanding why enthalpy can be viewed as \"heat content\" in a constant pressure system.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fucyI7Ouj2c.mp4/fucyI7Ouj2c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fucyI7Ouj2c.mp4/fucyI7Ouj2c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fucyI7Ouj2c.m3u8/fucyI7Ouj2c.m3u8"}, "slug": "enthalpy", "video_id": "fucyI7Ouj2c", "youtube_id": "fucyI7Ouj2c", "readable_id": "enthalpy"}, "4M62l7m1FJ4": {"duration": 208, "path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/example-calculator-to-evaluate-inverse-trig-function/", "keywords": "inverse trig tangent arctan tan arctangent", "id": "4M62l7m1FJ4", "title": "Example: Calculator to evaluate inverse trig function", "description": "Example using calculator to evaluate inverse tangent function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4M62l7m1FJ4.mp4/4M62l7m1FJ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4M62l7m1FJ4.mp4/4M62l7m1FJ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4M62l7m1FJ4.m3u8/4M62l7m1FJ4.m3u8"}, "slug": "example-calculator-to-evaluate-inverse-trig-function", "video_id": "4M62l7m1FJ4", "youtube_id": "4M62l7m1FJ4", "readable_id": "example-calculator-to-evaluate-inverse-trig-function"}, "AqMT_zB9rP8": {"duration": 130, "path": "khan/math/algebra2/arithmetic-with-polynomials/adding-and-subtracting-polynomials-review/subtracting-polynomials-with-multiple-variables/", "keywords": "u11_l3_t2_we2, Subtracting, polynomials, with, multiple, variables, CC_39336_A-APR_1", "id": "AqMT_zB9rP8", "title": "How to subtract polynomials with two variables (example)", "description": "Sal simplifies (4x^2y - 3xy + 25) - (9y^2x + 7xy - 20).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AqMT_zB9rP8.mp4/AqMT_zB9rP8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AqMT_zB9rP8.mp4/AqMT_zB9rP8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AqMT_zB9rP8.m3u8/AqMT_zB9rP8.m3u8"}, "slug": "subtracting-polynomials-with-multiple-variables", "video_id": "AqMT_zB9rP8", "youtube_id": "AqMT_zB9rP8", "readable_id": "subtracting-polynomials-with-multiple-variables"}, "OwPSuHXmiPw": {"duration": 902, "path": "khan/math/probability/statistics-inferential/margin-of-error/margin-of-error-1/", "keywords": "margin, of, error, confindence, interval, sampling, distribution, sample, mean, standard, deviation, CC_7_SP_1, CC_7_SP_2", "id": "OwPSuHXmiPw", "title": "Margin of error 1", "description": "Finding the 95% confidence interval for the proportion of a population voting for a candidate.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OwPSuHXmiPw.mp4/OwPSuHXmiPw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OwPSuHXmiPw.mp4/OwPSuHXmiPw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OwPSuHXmiPw.m3u8/OwPSuHXmiPw.m3u8"}, "slug": "margin-of-error-1", "video_id": "OwPSuHXmiPw", "youtube_id": "OwPSuHXmiPw", "readable_id": "margin-of-error-1"}, "HDgRsZedjI4": {"duration": 206, "path": "khan/partner-content/wi-phi/the-history-of-philosophy/deanova-cavendish-part-2/", "keywords": "", "id": "HDgRsZedjI4", "title": "Early Modern: Margaret Cavendish, Part 2", "description": "In the second of two videos, Adela Deanova introduces Margaret Cavendish, an early modern English philosopher, and discusses the background to her critique of experimental philosophy. This video is a part of a series of videos coming from Project Vox (Duke), a project recovering the lost voices of women philosophers.\n\nSpeaker: Adela Deanova, Duke University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HDgRsZedjI4.mp4/HDgRsZedjI4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HDgRsZedjI4.mp4/HDgRsZedjI4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HDgRsZedjI4.m3u8/HDgRsZedjI4.m3u8"}, "slug": "deanova-cavendish-part-2", "video_id": "HDgRsZedjI4", "youtube_id": "HDgRsZedjI4", "readable_id": "deanova-cavendish-part-2"}, "ZZdLl8v2VVY": {"duration": 109, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/concision-basic/", "keywords": "education,online learning,learning,lessons", "id": "ZZdLl8v2VVY", "title": "Writing: Concision, style, and tone \u2014 Basic example 1", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing concision.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZZdLl8v2VVY.mp4/ZZdLl8v2VVY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZZdLl8v2VVY.mp4/ZZdLl8v2VVY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZZdLl8v2VVY.m3u8/ZZdLl8v2VVY.m3u8"}, "slug": "concision-basic", "video_id": "ZZdLl8v2VVY", "youtube_id": "ZZdLl8v2VVY", "readable_id": "concision-basic"}, "OvRAIlok3fA": {"duration": 676, "path": "khan/test-prep/gmat/problem-solving/gmat-math-50/", "keywords": "GMAT, Math", "id": "OvRAIlok3fA", "title": "GMAT: Math 50", "description": "232-236, pgs. 184-185", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OvRAIlok3fA.mp4/OvRAIlok3fA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OvRAIlok3fA.mp4/OvRAIlok3fA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OvRAIlok3fA.m3u8/OvRAIlok3fA.m3u8"}, "slug": "gmat-math-50", "video_id": "OvRAIlok3fA", "youtube_id": "OvRAIlok3fA", "readable_id": "gmat-math-50"}, "2Bq2xopLew8": {"duration": 528, "path": "khan/test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system/what-is-lymph/", "keywords": "lymph", "id": "2Bq2xopLew8", "title": "What is actually in lymph", "description": "Learn about the differences between lymph and blood. Find out what is actually in lymph, and how it might be different across your body. By Patrick van Nieuwenhuizen.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2Bq2xopLew8.mp4/2Bq2xopLew8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2Bq2xopLew8.mp4/2Bq2xopLew8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2Bq2xopLew8.m3u8/2Bq2xopLew8.m3u8"}, "slug": "what-is-lymph", "video_id": "2Bq2xopLew8", "youtube_id": "2Bq2xopLew8", "readable_id": "what-is-lymph"}, "OB8b8aDGLgE": {"duration": 654, "path": "khan/math/multivariable-calculus/partial_derivatives_topic/gradient/gradient-of-a-scalar-field/", "keywords": "gradient, scalar, field", "id": "OB8b8aDGLgE", "title": "Gradient of a scalar field", "description": "Intuition of the gradient of a scalar field (temperature in a room) in 3 dimensions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OB8b8aDGLgE.mp4/OB8b8aDGLgE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OB8b8aDGLgE.mp4/OB8b8aDGLgE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OB8b8aDGLgE.m3u8/OB8b8aDGLgE.m3u8"}, "slug": "gradient-of-a-scalar-field", "video_id": "OB8b8aDGLgE", "youtube_id": "OB8b8aDGLgE", "readable_id": "gradient-of-a-scalar-field"}, "NnjN9GGfV6E": {"duration": 284, "path": "khan/humanities/medieval-world/medieval-book/making-medieval-book/an-introduction-to-medieval-scripts/", "keywords": "art history, middle ages, manuscripts, erik kwakkel, ", "id": "NnjN9GGfV6E", "title": "An introduction to Medieval scripts", "description": "Can you tell the difference between Carolingian Minuscule and Gothic script? Watch this video and you'll learn how. A conversation with Dr. Erik Kwakkel and Dr. Beth Harris about medieval scripts at the National Library of the Netherlands, in The Hague.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NnjN9GGfV6E.mp4/NnjN9GGfV6E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NnjN9GGfV6E.mp4/NnjN9GGfV6E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NnjN9GGfV6E.m3u8/NnjN9GGfV6E.m3u8"}, "slug": "an-introduction-to-medieval-scripts", "video_id": "NnjN9GGfV6E", "youtube_id": "NnjN9GGfV6E", "readable_id": "an-introduction-to-medieval-scripts"}, "S_YIUXy-WFM": {"duration": 290, "path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/finding-where-the-derivative-is-equal-to-the-average-change/", "keywords": "", "id": "S_YIUXy-WFM", "title": "Finding where the derivative is equal to the average change", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S_YIUXy-WFM.mp4/S_YIUXy-WFM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S_YIUXy-WFM.mp4/S_YIUXy-WFM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S_YIUXy-WFM.m3u8/S_YIUXy-WFM.m3u8"}, "slug": "finding-where-the-derivative-is-equal-to-the-average-change", "video_id": "S_YIUXy-WFM", "youtube_id": "S_YIUXy-WFM", "readable_id": "finding-where-the-derivative-is-equal-to-the-average-change"}, "pXWPtZVFk9k": {"duration": 154, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-14/", "keywords": "", "id": "pXWPtZVFk9k", "title": "14 Substituting variables", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pXWPtZVFk9k.mp4/pXWPtZVFk9k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pXWPtZVFk9k.mp4/pXWPtZVFk9k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pXWPtZVFk9k.m3u8/pXWPtZVFk9k.m3u8"}, "slug": "sat-2009-may-3-14", "video_id": "pXWPtZVFk9k", "youtube_id": "pXWPtZVFk9k", "readable_id": "sat-2009-may-3-14"}, "-DlCeZw9RFw": {"duration": 186, "path": "khan/partner-content/nasa/measuringuniverse/spacemath1/conjunctions/", "keywords": "", "id": "-DlCeZw9RFw", "title": "Conjunctions", "description": "The three brightest planets in the night sky on May 26th, 2013 lined up for a beautiful sunset conjunction.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-DlCeZw9RFw.mp4/-DlCeZw9RFw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-DlCeZw9RFw.mp4/-DlCeZw9RFw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-DlCeZw9RFw.m3u8/-DlCeZw9RFw.m3u8"}, "slug": "conjunctions", "video_id": "-DlCeZw9RFw", "youtube_id": "-DlCeZw9RFw", "readable_id": "conjunctions"}, "Ce4BGV1DVVg": {"duration": 347, "path": "khan/science/organic-chemistry/organic-structures/acid-base-review/acid-strength-anion-size-and-bond-energy/", "keywords": "", "id": "Ce4BGV1DVVg", "title": "Acid strength, anion size, and bond energy", "description": "How anion size and bond dissociation energies affect acidity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ce4BGV1DVVg.mp4/Ce4BGV1DVVg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ce4BGV1DVVg.mp4/Ce4BGV1DVVg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ce4BGV1DVVg.m3u8/Ce4BGV1DVVg.m3u8"}, "slug": "acid-strength-anion-size-and-bond-energy", "video_id": "Ce4BGV1DVVg", "youtube_id": "Ce4BGV1DVVg", "readable_id": "acid-strength-anion-size-and-bond-energy"}, "R4qy9beFpHw": {"duration": 528, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/valvular-heart-disease-causes/", "keywords": "", "id": "R4qy9beFpHw", "title": "Valvular heart disease causes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R4qy9beFpHw.mp4/R4qy9beFpHw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R4qy9beFpHw.mp4/R4qy9beFpHw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R4qy9beFpHw.m3u8/R4qy9beFpHw.m3u8"}, "slug": "valvular-heart-disease-causes", "video_id": "R4qy9beFpHw", "youtube_id": "R4qy9beFpHw", "readable_id": "valvular-heart-disease-causes"}, "Hc9mcx739js": {"duration": 222, "path": "khan/math/early-math/cc-early-math-add-sub-1000/cc-early-math-strategies-for-adding-two-and-three-digit-numbers/breaking-apart-three-digit-addition-problems/", "keywords": "education,online learning,learning,lessons", "id": "Hc9mcx739js", "title": "Breaking apart three-digit addition problems", "description": "Let's think about ways to break up addition problems. This is useful because it might make it easier for us to actually compute the addition.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hc9mcx739js.mp4/Hc9mcx739js.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hc9mcx739js.mp4/Hc9mcx739js.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hc9mcx739js.m3u8/Hc9mcx739js.m3u8"}, "slug": "breaking-apart-three-digit-addition-problems", "video_id": "Hc9mcx739js", "youtube_id": "Hc9mcx739js", "readable_id": "breaking-apart-three-digit-addition-problems"}, "fh8gkPW_6g4": {"duration": 148, "path": "khan/math/pre-algebra/order-of-operations/rounding_whole_numbers/rounding-whole-numbers-2/", "keywords": "U01_L1_T2_we2, Rounding, Whole, Numbers, CC_3_OA_8, CC_4_NBT_3, CC_4_OA_3", "id": "fh8gkPW_6g4", "title": "Rounding whole numbers example 2", "description": "Another rounding exercise using whole numbers. Having fun yet? We are!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fh8gkPW_6g4.mp4/fh8gkPW_6g4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fh8gkPW_6g4.mp4/fh8gkPW_6g4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fh8gkPW_6g4.m3u8/fh8gkPW_6g4.m3u8"}, "slug": "rounding-whole-numbers-2", "video_id": "fh8gkPW_6g4", "youtube_id": "fh8gkPW_6g4", "readable_id": "rounding-whole-numbers-2"}, "dJAc0mc9VYo": {"duration": 97, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2009-may-3-17/", "keywords": "", "id": "dJAc0mc9VYo", "title": "17 Fraction of circumference", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dJAc0mc9VYo.mp4/dJAc0mc9VYo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dJAc0mc9VYo.mp4/dJAc0mc9VYo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dJAc0mc9VYo.m3u8/dJAc0mc9VYo.m3u8"}, "slug": "sat-2009-may-3-17", "video_id": "dJAc0mc9VYo", "youtube_id": "dJAc0mc9VYo", "readable_id": "sat-2009-may-3-17"}, "grmmM_KhQ4U": {"duration": 255, "path": "khan/math/algebra/systems-of-linear-equations/systems-of-linear-equations-word-problems/understanding-systems-of-equations-example/", "keywords": "", "id": "grmmM_KhQ4U", "title": "Systems of equations word problems example: Price of coffee and croissant", "description": "Sal solves a word problem about the price of coffee and croissant by creating a system of equations and solving it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/grmmM_KhQ4U.mp4/grmmM_KhQ4U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/grmmM_KhQ4U.mp4/grmmM_KhQ4U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/grmmM_KhQ4U.m3u8/grmmM_KhQ4U.m3u8"}, "slug": "understanding-systems-of-equations-example", "video_id": "grmmM_KhQ4U", "youtube_id": "grmmM_KhQ4U", "readable_id": "understanding-systems-of-equations-example"}, "X9ypryY7hrQ": {"duration": 429, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-cleavage-ethers/williamson-ether-synthesis/", "keywords": "", "id": "X9ypryY7hrQ", "title": "Williamson ether synthesis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X9ypryY7hrQ.mp4/X9ypryY7hrQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X9ypryY7hrQ.mp4/X9ypryY7hrQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X9ypryY7hrQ.m3u8/X9ypryY7hrQ.m3u8"}, "slug": "williamson-ether-synthesis", "video_id": "X9ypryY7hrQ", "youtube_id": "X9ypryY7hrQ", "readable_id": "williamson-ether-synthesis"}, "yTMZsxSBv_0": {"duration": 292, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/diagnosing-strokes-by-history-and-physical-exam/", "keywords": "", "id": "yTMZsxSBv_0", "title": "Diagnosing strokes by history and physical exam", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yTMZsxSBv_0.mp4/yTMZsxSBv_0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yTMZsxSBv_0.mp4/yTMZsxSBv_0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yTMZsxSBv_0.m3u8/yTMZsxSBv_0.m3u8"}, "slug": "diagnosing-strokes-by-history-and-physical-exam", "video_id": "yTMZsxSBv_0", "youtube_id": "yTMZsxSBv_0", "readable_id": "diagnosing-strokes-by-history-and-physical-exam"}, "doe_zZDjU5c": {"duration": 627, "path": "khan/test-prep/mcat/chemical-processes/carbohydrates-5d/carbohydrates-naming-and-classification/", "keywords": "", "id": "doe_zZDjU5c", "title": "Carbohydrates - naming and classification", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/doe_zZDjU5c.mp4/doe_zZDjU5c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/doe_zZDjU5c.mp4/doe_zZDjU5c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/doe_zZDjU5c.m3u8/doe_zZDjU5c.m3u8"}, "slug": "carbohydrates-naming-and-classification", "video_id": "doe_zZDjU5c", "youtube_id": "doe_zZDjU5c", "readable_id": "carbohydrates-naming-and-classification"}, "AqzpkyiL4s4": {"duration": 293, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h8-harder/", "keywords": "", "id": "AqzpkyiL4s4", "title": "Interpreting linear functions \u2014 Harder example", "description": "Watch Sal work through a harder Interpreting linear functions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AqzpkyiL4s4.mp4/AqzpkyiL4s4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AqzpkyiL4s4.mp4/AqzpkyiL4s4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AqzpkyiL4s4.m3u8/AqzpkyiL4s4.m3u8"}, "slug": "sat-math-h8-harder", "video_id": "AqzpkyiL4s4", "youtube_id": "AqzpkyiL4s4", "readable_id": "sat-math-h8-harder"}, "pzHEtjAUVtY": {"duration": 551, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-jay/sn1-sn2-e1-e2-reactions-primary-and-tertiary-alkyl-halides/", "keywords": "", "id": "pzHEtjAUVtY", "title": "Sn1 Sn2 E1 E2 reactions: Primary and tertiary alkyl halides", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pzHEtjAUVtY.mp4/pzHEtjAUVtY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pzHEtjAUVtY.mp4/pzHEtjAUVtY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pzHEtjAUVtY.m3u8/pzHEtjAUVtY.m3u8"}, "slug": "sn1-sn2-e1-e2-reactions-primary-and-tertiary-alkyl-halides", "video_id": "pzHEtjAUVtY", "youtube_id": "pzHEtjAUVtY", "readable_id": "sn1-sn2-e1-e2-reactions-primary-and-tertiary-alkyl-halides"}, "TEXSW-o8674": {"duration": 135, "path": "khan/math/algebra/algebra-functions/functions-average-rate-of-change/average-rate-of-change-example-1/", "keywords": "", "id": "TEXSW-o8674", "title": "How to find the average rate of change from a graph (example)", "description": "Sal finds the interval in a function's graph where the function has an average rate of change of -4.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TEXSW-o8674.mp4/TEXSW-o8674.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TEXSW-o8674.mp4/TEXSW-o8674.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TEXSW-o8674.m3u8/TEXSW-o8674.m3u8"}, "slug": "average-rate-of-change-example-1", "video_id": "TEXSW-o8674", "youtube_id": "TEXSW-o8674", "readable_id": "average-rate-of-change-example-1"}, "W3a2QIm3cXM": {"duration": 175, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-bust-of-medusa-c-1644-48/", "keywords": "Bernini, Medusa, Capitoline Museum, Art History, Smarthistory, Art", "id": "W3a2QIm3cXM", "title": "Bernini, Bust of Medusa", "description": "Gian Lorenzo Bernini, Bust of Medusa, marble, c. 1644-48 (Capitoline Museum)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\n\u00a0\n\nMedusa, one of the three Gorgons, daughter of Phorcys and Ceto. She was the only one of the Gorgons who was subject to mortality. She is celebrated for her personal charms and the beauty of her locks. Neptune became enamoured of her, and obtained her favours in the temple of Minerva. This violation of the sanctity of the temple provoked Minerva, and she changed the beautiful locks of Medusa, which had inspired Neptune\u2019s love to serpents.\n\nAccording to Apollodorus, Medusa and her sisters came into the world with snakes on their heads, instead of hair, with yellow wings and brazen hands. Their bodies were also covered with impenetrable scales, and their very looks had the power of killing or turning to stones. Perseus rendered his name immortal by his conquest of Medusa. He cut off her head, and the blood that dropped from the wound produced the innumerable serpents that infest Africa. The conqueror placed Medusa's head on the shield of Minerva, which he had used in his expedition. The head still retained the same petrifying power as before, as it was fatally known in the court of Cepheus. . . . Some suppose that the Gorgons were a nation of women, whom Perseus conquered.(From\u00a0Lempri\u00e9re\u2019s Classical Dictionary of Proper names mentioned in Ancient Authors Writ Large. Ed. J. Lempri\u00e9re and F.A. Wright. London: Routledge & Kegan Paul. As quoted by\u00a0Modern American Poetry site, Department of English, University of Illinois)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W3a2QIm3cXM.mp4/W3a2QIm3cXM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W3a2QIm3cXM.mp4/W3a2QIm3cXM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W3a2QIm3cXM.m3u8/W3a2QIm3cXM.m3u8"}, "slug": "bernini-bust-of-medusa-c-1644-48", "video_id": "W3a2QIm3cXM", "youtube_id": "W3a2QIm3cXM", "readable_id": "bernini-bust-of-medusa-c-1644-48"}, "gnCL_0uA6Ds": {"duration": 428, "path": "khan/math/pre-algebra/rates-and-ratios/unit_conversion/application-problems-involving-units-of-weight/", "keywords": "U06_L1_T2_we3, Application, problems, involving, units, of, weight, CC_4_MD_1, CC_5_MD_1, CC_6_RP_3_d", "id": "gnCL_0uA6Ds", "title": "Unit measurement word problem: weight (US customary)", "description": "We're moving between units of weight in this word problem. Ever get in an elevator with a bunch people and wonder to yourself, \"How many people can this elevator safely hold?\" Yeah, us too. You can solve that problem now.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gnCL_0uA6Ds.mp4/gnCL_0uA6Ds.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gnCL_0uA6Ds.mp4/gnCL_0uA6Ds.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gnCL_0uA6Ds.m3u8/gnCL_0uA6Ds.m3u8"}, "slug": "application-problems-involving-units-of-weight", "video_id": "gnCL_0uA6Ds", "youtube_id": "gnCL_0uA6Ds", "readable_id": "application-problems-involving-units-of-weight"}, "RFn-IGlayAg": {"duration": 679, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/richter-scale/", "keywords": "geology", "id": "RFn-IGlayAg", "title": "Richter scale", "description": "The basics of the logarithmic Richter and Moment Magnitude Scales to measure earthquakes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RFn-IGlayAg.mp4/RFn-IGlayAg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RFn-IGlayAg.mp4/RFn-IGlayAg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RFn-IGlayAg.m3u8/RFn-IGlayAg.m3u8"}, "slug": "richter-scale", "video_id": "RFn-IGlayAg", "youtube_id": "RFn-IGlayAg", "readable_id": "richter-scale"}, "Pr_-cUA_PY8": {"duration": 605, "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/diabetic-nephropathy-clinical-presentation-treatment/", "keywords": "", "id": "Pr_-cUA_PY8", "title": "Diabetic nephropathy - Clinical presentation & treatment", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Pr_-cUA_PY8.mp4/Pr_-cUA_PY8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Pr_-cUA_PY8.mp4/Pr_-cUA_PY8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Pr_-cUA_PY8.m3u8/Pr_-cUA_PY8.m3u8"}, "slug": "diabetic-nephropathy-clinical-presentation-treatment", "video_id": "Pr_-cUA_PY8", "youtube_id": "Pr_-cUA_PY8", "readable_id": "diabetic-nephropathy-clinical-presentation-treatment"}, "tnoPnyvVjyc": {"duration": 288, "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-4a/", "keywords": "advanced, placement, calculus, ap, exam", "id": "tnoPnyvVjyc", "title": "2011 Calculus AB free response #4a", "description": "Taking derivatives and integrals of strangely defined functions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tnoPnyvVjyc.mp4/tnoPnyvVjyc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tnoPnyvVjyc.mp4/tnoPnyvVjyc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tnoPnyvVjyc.m3u8/tnoPnyvVjyc.m3u8"}, "slug": "2011-calculus-ab-free-response-4a", "video_id": "tnoPnyvVjyc", "youtube_id": "tnoPnyvVjyc", "readable_id": "2011-calculus-ab-free-response-4a"}, "4qoE3OVy4Vo": {"duration": 211, "path": "khan/test-prep/mcat/society-and-culture/culture/subculture-vs-counterculture/", "keywords": "", "id": "4qoE3OVy4Vo", "title": "Subculture vs counterculture", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4qoE3OVy4Vo.mp4/4qoE3OVy4Vo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4qoE3OVy4Vo.mp4/4qoE3OVy4Vo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4qoE3OVy4Vo.m3u8/4qoE3OVy4Vo.m3u8"}, "slug": "subculture-vs-counterculture", "video_id": "4qoE3OVy4Vo", "youtube_id": "4qoE3OVy4Vo", "readable_id": "subculture-vs-counterculture"}, "RuPMsK0mQC8": {"duration": 450, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/credit-card-interest/annual-percentage-rate-apr-and-effective-apr/", "keywords": "APR, annual, percentage, rate, effective", "id": "RuPMsK0mQC8", "title": "Annual percentage rate (APR) and effective APR", "description": "The difference between APR and effective APR", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RuPMsK0mQC8.mp4/RuPMsK0mQC8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RuPMsK0mQC8.mp4/RuPMsK0mQC8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RuPMsK0mQC8.m3u8/RuPMsK0mQC8.m3u8"}, "slug": "annual-percentage-rate-apr-and-effective-apr", "video_id": "RuPMsK0mQC8", "youtube_id": "RuPMsK0mQC8", "readable_id": "annual-percentage-rate-apr-and-effective-apr"}, "RD0waXH62AI": {"duration": 518, "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/where-do-our-nails-and-hair-come-from/", "keywords": "", "id": "RD0waXH62AI", "title": "Where do our nails and hair come from?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RD0waXH62AI.mp4/RD0waXH62AI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RD0waXH62AI.mp4/RD0waXH62AI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RD0waXH62AI.m3u8/RD0waXH62AI.m3u8"}, "slug": "where-do-our-nails-and-hair-come-from", "video_id": "RD0waXH62AI", "youtube_id": "RD0waXH62AI", "readable_id": "where-do-our-nails-and-hair-come-from"}, "dlpmllTx5MY": {"duration": 573, "path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/projectile-motion-part-5/", "keywords": "Physics, projectile, acceleration, velocity, khan", "id": "dlpmllTx5MY", "title": "Projectile motion (part 5)", "description": "How fast was the ball that you threw upwards?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dlpmllTx5MY.mp4/dlpmllTx5MY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dlpmllTx5MY.mp4/dlpmllTx5MY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dlpmllTx5MY.m3u8/dlpmllTx5MY.m3u8"}, "slug": "projectile-motion-part-5", "video_id": "dlpmllTx5MY", "youtube_id": "dlpmllTx5MY", "readable_id": "projectile-motion-part-5"}, "LzYJVsvqS50": {"duration": 136, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/basic-equation-practice/steps-when-solving-equations/", "keywords": "", "id": "LzYJVsvqS50", "title": "Understanding steps when solving equations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LzYJVsvqS50.mp4/LzYJVsvqS50.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LzYJVsvqS50.mp4/LzYJVsvqS50.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LzYJVsvqS50.m3u8/LzYJVsvqS50.m3u8"}, "slug": "steps-when-solving-equations", "video_id": "LzYJVsvqS50", "youtube_id": "LzYJVsvqS50", "readable_id": "steps-when-solving-equations"}, "HXIj16mjfgk": {"duration": 226, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-trinomials-by-grouping-1/", "keywords": "U09_L1_T2_we1, Factoring, Trinomials, by, Grouping, CC_39336_A-SSE_1_a, CC_39336_A-SSE_2", "id": "HXIj16mjfgk", "title": "How to factor a polynomial with two variables by grouping (example)", "description": "Sal factors 5rs+25r-3s-15 as (s+5)(5r-3).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HXIj16mjfgk.mp4/HXIj16mjfgk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HXIj16mjfgk.mp4/HXIj16mjfgk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HXIj16mjfgk.m3u8/HXIj16mjfgk.m3u8"}, "slug": "factoring-trinomials-by-grouping-1", "video_id": "HXIj16mjfgk", "youtube_id": "HXIj16mjfgk", "readable_id": "factoring-trinomials-by-grouping-1"}, "ZgzpTx-s9Zo": {"duration": 233, "path": "khan/math/early-math/cc-early-math-add-sub-20/cc-early-math-add-20/adding-within-20/", "keywords": "", "id": "ZgzpTx-s9Zo", "title": "Adding 7 + 6", "description": "Learn how to add 7 + 6 using the number line.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZgzpTx-s9Zo.mp4/ZgzpTx-s9Zo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZgzpTx-s9Zo.mp4/ZgzpTx-s9Zo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZgzpTx-s9Zo.m3u8/ZgzpTx-s9Zo.m3u8"}, "slug": "adding-within-20", "video_id": "ZgzpTx-s9Zo", "youtube_id": "ZgzpTx-s9Zo", "readable_id": "adding-within-20"}, "9x1vnGfIE8k": {"duration": 511, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/dvorak-four/", "keywords": "", "id": "9x1vnGfIE8k", "title": "Antoni\u0301n Dvor\u030ca\u0301k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 4)", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9x1vnGfIE8k.mp4/9x1vnGfIE8k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9x1vnGfIE8k.mp4/9x1vnGfIE8k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9x1vnGfIE8k.m3u8/9x1vnGfIE8k.m3u8"}, "slug": "dvorak-four", "video_id": "9x1vnGfIE8k", "youtube_id": "9x1vnGfIE8k", "readable_id": "dvorak-four"}, "09VLUSkaZU8": {"duration": 266, "path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/definite-integral-shifted-function/", "keywords": "", "id": "09VLUSkaZU8", "title": "Definite integral of shifted function", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/09VLUSkaZU8.mp4/09VLUSkaZU8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/09VLUSkaZU8.mp4/09VLUSkaZU8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/09VLUSkaZU8.m3u8/09VLUSkaZU8.m3u8"}, "slug": "definite-integral-shifted-function", "video_id": "09VLUSkaZU8", "youtube_id": "09VLUSkaZU8", "readable_id": "definite-integral-shifted-function"}, "DGRnSnPSOqg": {"duration": 532, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/sinusitis-diagnosis-and-treatment/", "keywords": "", "id": "DGRnSnPSOqg", "title": "Sinusitis diagnosis and treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DGRnSnPSOqg.mp4/DGRnSnPSOqg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DGRnSnPSOqg.mp4/DGRnSnPSOqg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DGRnSnPSOqg.m3u8/DGRnSnPSOqg.m3u8"}, "slug": "sinusitis-diagnosis-and-treatment", "video_id": "DGRnSnPSOqg", "youtube_id": "DGRnSnPSOqg", "readable_id": "sinusitis-diagnosis-and-treatment"}, "n34dqyVCXs4": {"duration": 153, "path": "khan/math/algebra2/manipulating-functions/combining-functions/sum-of-functions/", "keywords": "u17_l3_t1_we1, Sum, of, Functions", "id": "n34dqyVCXs4", "title": "How to combine functions by adding them (example)", "description": "Sal solves the following problem: given that f(x)=9-x^2 and g(x)=5x^2+2x+1, find (f+g)(x). He explains that generally, (f+g)(x)=f(x)+g(x).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n34dqyVCXs4.mp4/n34dqyVCXs4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n34dqyVCXs4.mp4/n34dqyVCXs4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n34dqyVCXs4.m3u8/n34dqyVCXs4.m3u8"}, "slug": "sum-of-functions", "video_id": "n34dqyVCXs4", "youtube_id": "n34dqyVCXs4", "readable_id": "sum-of-functions"}, "QTVDRbLX2_o": {"duration": 178, "path": "khan/partner-content/big-history-project/life/life-and-big-history/bhp-threshold-5/", "keywords": "", "id": "QTVDRbLX2_o", "title": "Threshold 5: Life on Earth Video", "description": "Through a diversity of chemical elements and the perfect conditions on Earth, life mysteriously appeared.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QTVDRbLX2_o.mp4/QTVDRbLX2_o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QTVDRbLX2_o.mp4/QTVDRbLX2_o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QTVDRbLX2_o.m3u8/QTVDRbLX2_o.m3u8"}, "slug": "bhp-threshold-5", "video_id": "QTVDRbLX2_o", "youtube_id": "QTVDRbLX2_o", "readable_id": "bhp-threshold-5"}, "VST_U297pH0": {"duration": 204, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-payoff-diagram/", "keywords": "Put, Payoff, Diagram", "id": "VST_U297pH0", "title": "Put payoff diagram", "description": "Put Payoff Diagram", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VST_U297pH0.mp4/VST_U297pH0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VST_U297pH0.mp4/VST_U297pH0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VST_U297pH0.m3u8/VST_U297pH0.m3u8"}, "slug": "put-payoff-diagram", "video_id": "VST_U297pH0", "youtube_id": "VST_U297pH0", "readable_id": "put-payoff-diagram"}, "QlQjCQ5SXco": {"duration": 236, "path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/moholy-nagy-climbing-the-mast-1928/", "keywords": "", "id": "QlQjCQ5SXco", "title": "Moholy-Nagy, Climbing the Mast", "description": "L\u00e1szl\u00f3 Moholy-Nagy, Climbing the Mast, 1928, gelatin silver print, 5.4 x 28 cm or 13 15/16 x 11 inches (Metropolitan Museum of Art)\n\nSpeakers: Dr. Juliana Kreinik and Dr. Vanessa Rocco\n\nView this on Smarthistory.org: http://smarthistory.khanacademy.org/laszlo-moholy-nagy-climbing-the-mast.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QlQjCQ5SXco.mp4/QlQjCQ5SXco.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QlQjCQ5SXco.mp4/QlQjCQ5SXco.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QlQjCQ5SXco.m3u8/QlQjCQ5SXco.m3u8"}, "slug": "moholy-nagy-climbing-the-mast-1928", "video_id": "QlQjCQ5SXco", "youtube_id": "QlQjCQ5SXco", "readable_id": "moholy-nagy-climbing-the-mast-1928"}, "6CFE60iP2Ug": {"duration": 487, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/standard-form/standard-form-for-linear-equations/", "keywords": "", "id": "6CFE60iP2Ug", "title": "Standard form for linear equations", "description": "Standard form for linear equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6CFE60iP2Ug.mp4/6CFE60iP2Ug.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6CFE60iP2Ug.mp4/6CFE60iP2Ug.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6CFE60iP2Ug.m3u8/6CFE60iP2Ug.m3u8"}, "slug": "standard-form-for-linear-equations", "video_id": "6CFE60iP2Ug", "youtube_id": "6CFE60iP2Ug", "readable_id": "standard-form-for-linear-equations"}, "4bmPvB15aYU": {"duration": 485, "path": "khan/humanities/history/euro-hist/world-war-i-fighting/technology-in-world-war-i/", "keywords": "", "id": "4bmPvB15aYU", "title": "Technology in World War I", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4bmPvB15aYU.mp4/4bmPvB15aYU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4bmPvB15aYU.mp4/4bmPvB15aYU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4bmPvB15aYU.m3u8/4bmPvB15aYU.m3u8"}, "slug": "technology-in-world-war-i", "video_id": "4bmPvB15aYU", "youtube_id": "4bmPvB15aYU", "readable_id": "technology-in-world-war-i"}, "q71hYD9Xhek": {"duration": 82, "path": "khan/college-admissions/wrapping-up/post-college-acceptance/selecting-your-college/", "keywords": "", "id": "q71hYD9Xhek", "title": "Selecting your college", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q71hYD9Xhek.mp4/q71hYD9Xhek.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q71hYD9Xhek.mp4/q71hYD9Xhek.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q71hYD9Xhek.m3u8/q71hYD9Xhek.m3u8"}, "slug": "selecting-your-college", "video_id": "q71hYD9Xhek", "youtube_id": "q71hYD9Xhek", "readable_id": "selecting-your-college"}, "1V9wVmO0Tfg": {"duration": 672, "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/hubble-s-law/", "keywords": "Hubble's, Law", "id": "1V9wVmO0Tfg", "title": "Hubble's law", "description": "Hubble's Law", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1V9wVmO0Tfg.mp4/1V9wVmO0Tfg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1V9wVmO0Tfg.mp4/1V9wVmO0Tfg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1V9wVmO0Tfg.m3u8/1V9wVmO0Tfg.m3u8"}, "slug": "hubble-s-law", "video_id": "1V9wVmO0Tfg", "youtube_id": "1V9wVmO0Tfg", "readable_id": "hubble-s-law"}, "smuhAjyRbw0": {"duration": 418, "path": "khan/partner-content/wi-phi/value-theory-1/moral-status/", "keywords": "", "id": "smuhAjyRbw0", "title": "Ethics: Moral Status", "description": "Jeff discusses the nature of moral status. What does it take for someone to be a subject of moral concern? Do they have to be human? Rational? Sentient? Alive? And how does our answer to this question affect how we should act in everyday life?\n\nSpeaker: Dr. Jeff Sebo, Research Fellow, Department of Bioethics, The National Institutes of Health", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/smuhAjyRbw0.mp4/smuhAjyRbw0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/smuhAjyRbw0.mp4/smuhAjyRbw0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/smuhAjyRbw0.m3u8/smuhAjyRbw0.m3u8"}, "slug": "moral-status", "video_id": "smuhAjyRbw0", "youtube_id": "smuhAjyRbw0", "readable_id": "moral-status"}, "542CMooowNY": {"duration": 249, "path": "khan/test-prep/mcat/cells/cellular-division/cell-cycle-control/", "keywords": "", "id": "542CMooowNY", "title": "Cell cycle control", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/542CMooowNY.mp4/542CMooowNY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/542CMooowNY.mp4/542CMooowNY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/542CMooowNY.m3u8/542CMooowNY.m3u8"}, "slug": "cell-cycle-control", "video_id": "542CMooowNY", "youtube_id": "542CMooowNY", "readable_id": "cell-cycle-control"}, "2fzYE-Emar0": {"duration": 496, "path": "khan/math/probability/statistics-inferential/normal_distribution/ck12-org-exercise-standard-normal-distribution-and-the-empirical-rule/", "keywords": "standard, normal, distribution, empirical, rule, CC_6_SP_5_c, CC_6_SP_5_d", "id": "2fzYE-Emar0", "title": "ck12.org exercise: Standard normal distribution and the empirical rule", "description": "Using the Empirical Rule with a standard normal distribution", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2fzYE-Emar0.mp4/2fzYE-Emar0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2fzYE-Emar0.mp4/2fzYE-Emar0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2fzYE-Emar0.m3u8/2fzYE-Emar0.m3u8"}, "slug": "ck12-org-exercise-standard-normal-distribution-and-the-empirical-rule", "video_id": "2fzYE-Emar0", "youtube_id": "2fzYE-Emar0", "readable_id": "ck12-org-exercise-standard-normal-distribution-and-the-empirical-rule"}, "vXESvgGbSiw": {"duration": 528, "path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-stereochemistry-of-dienophile/", "keywords": "Diels\u2013Alder Reaction", "id": "vXESvgGbSiw", "title": "Diels-Alder: stereochemistry of dienophile", "description": "How to analyze the stereochemistry of the dienophile in a Diels-Alder reaction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vXESvgGbSiw.mp4/vXESvgGbSiw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vXESvgGbSiw.mp4/vXESvgGbSiw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vXESvgGbSiw.m3u8/vXESvgGbSiw.m3u8"}, "slug": "diels-alder-stereochemistry-of-dienophile", "video_id": "vXESvgGbSiw", "youtube_id": "vXESvgGbSiw", "readable_id": "diels-alder-stereochemistry-of-dienophile"}, "ie0waMJxnTs": {"duration": 137, "path": "khan/math/early-math/cc-early-math-add-sub-basics/cc-early-math-together-apart/adding-fruit/", "keywords": "", "id": "ie0waMJxnTs", "title": "Pieces of fruit", "description": "Learn how to add fruit (by putting fruit together) and sutract fruit (by taking fruit away). Examples used are 5+3 and 5-3.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ie0waMJxnTs.mp4/ie0waMJxnTs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ie0waMJxnTs.mp4/ie0waMJxnTs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ie0waMJxnTs.m3u8/ie0waMJxnTs.m3u8"}, "slug": "adding-fruit", "video_id": "ie0waMJxnTs", "youtube_id": "ie0waMJxnTs", "readable_id": "adding-fruit"}, "-LTXzYXaAuk": {"duration": 697, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/cupcake-economics-2/", "keywords": "economics, finance, inflation, deflation, income, statement", "id": "-LTXzYXaAuk", "title": "Cupcake economics 2", "description": "More analysis of the cupcake business.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-LTXzYXaAuk.mp4/-LTXzYXaAuk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-LTXzYXaAuk.mp4/-LTXzYXaAuk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-LTXzYXaAuk.m3u8/-LTXzYXaAuk.m3u8"}, "slug": "cupcake-economics-2", "video_id": "-LTXzYXaAuk", "youtube_id": "-LTXzYXaAuk", "readable_id": "cupcake-economics-2"}, "vrGNXAGmfCM": {"duration": 206, "path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/floating-exchange-effect-on-china/", "keywords": "Floating, Exchange, Effect, on, China", "id": "vrGNXAGmfCM", "title": "Floating exchange effect on China", "description": "Floating Exchange Effect on China", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vrGNXAGmfCM.mp4/vrGNXAGmfCM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vrGNXAGmfCM.mp4/vrGNXAGmfCM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vrGNXAGmfCM.m3u8/vrGNXAGmfCM.m3u8"}, "slug": "floating-exchange-effect-on-china", "video_id": "vrGNXAGmfCM", "youtube_id": "vrGNXAGmfCM", "readable_id": "floating-exchange-effect-on-china"}, "XsD7mqFDJs0": {"duration": 375, "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/historic-ad-as-scenarios/real-gdp-driving-price/", "keywords": "macroeconomics, AD-AS, model", "id": "XsD7mqFDJs0", "title": "Real GDP driving price", "description": "Thinking about how high utilization could drive price as another justification for an upward sloping short-run aggregate supply curve", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XsD7mqFDJs0.mp4/XsD7mqFDJs0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XsD7mqFDJs0.mp4/XsD7mqFDJs0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XsD7mqFDJs0.m3u8/XsD7mqFDJs0.m3u8"}, "slug": "real-gdp-driving-price", "video_id": "XsD7mqFDJs0", "youtube_id": "XsD7mqFDJs0", "readable_id": "real-gdp-driving-price"}, "cgZHD9We0mY": {"duration": 338, "path": "khan/humanities/art-americas/us-art-19c/us-19c-arch-sculp-photo/hopkins-chair/", "keywords": "Herter Brothers,Chair (Product Category),smarthistory,Khan Academy (Nonprofit Organization),Cooper\u2013Hewitt National Design Museum (Museum),Decorative Arts (Product Category),Furniture (Industry)", "id": "cgZHD9We0mY", "title": "Mark Hopkins House Side Chair (Herter Brothers)", "description": "Mark Hopkins House Side Chair, c. 1878-80, designed and made by Herter Brothers (New York), rosewood, inlaid and veneered with various woods, silk (of the period, but not original) (Cooper Hewitt, Smithsonian Design Museum, Museum purchase from General Acquisitions Endowment Fund, 2010-5-1) A conversation with Emily Orr (Assistant Curator of Modern and Contemporary American Design, Cooper Hewitt, Smithsonian Design Museum) and Dr. Beth Harris (Smarthistory)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cgZHD9We0mY.mp4/cgZHD9We0mY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cgZHD9We0mY.mp4/cgZHD9We0mY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cgZHD9We0mY.m3u8/cgZHD9We0mY.m3u8"}, "slug": "hopkins-chair", "video_id": "cgZHD9We0mY", "youtube_id": "cgZHD9We0mY", "readable_id": "hopkins-chair"}, "DMCowipIXgE": {"duration": 541, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/placenta-previa/", "keywords": "", "id": "DMCowipIXgE", "title": "Placenta previa", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DMCowipIXgE.mp4/DMCowipIXgE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DMCowipIXgE.mp4/DMCowipIXgE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DMCowipIXgE.m3u8/DMCowipIXgE.m3u8"}, "slug": "placenta-previa", "video_id": "DMCowipIXgE", "youtube_id": "DMCowipIXgE", "readable_id": "placenta-previa"}, "bzseeIVEslA": {"duration": 132, "path": "khan/math/algebra/systems-of-linear-equations/analyzing-the-solutions-to-systems-of-equations/understanding-systems-of-equations-example-2/", "keywords": "", "id": "bzseeIVEslA", "title": "How many solutions does a system of linear equations have if there are at least two?", "description": "Sal answers this question for you!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bzseeIVEslA.mp4/bzseeIVEslA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bzseeIVEslA.mp4/bzseeIVEslA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bzseeIVEslA.m3u8/bzseeIVEslA.m3u8"}, "slug": "understanding-systems-of-equations-example-2", "video_id": "bzseeIVEslA", "youtube_id": "bzseeIVEslA", "readable_id": "understanding-systems-of-equations-example-2"}, "Axox0C6aoTo": {"duration": 183, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/campin/robert-campin-christ-and-the-virgin-c-1430-35/", "keywords": "Campin, Khan Academy, Smarthistory, Art History, Northern Renaissance, Christ, Virgin Mary, Google Art Project, Jesus, Flemish, Netherlandish, renaissance, northern, faces", "id": "Axox0C6aoTo", "title": "Campin, Christ and the Virgin", "description": "Robert Campin (also called the Master of Fl\u00e9malle), Christ and the Virgin, c. 1430-35, oil and gold on panel, 11-1/4 x 17-15/16 inches / 28.6 x 45.6 cm (Philadelphia Museum of Art)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Axox0C6aoTo.mp4/Axox0C6aoTo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Axox0C6aoTo.mp4/Axox0C6aoTo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Axox0C6aoTo.m3u8/Axox0C6aoTo.m3u8"}, "slug": "robert-campin-christ-and-the-virgin-c-1430-35", "video_id": "Axox0C6aoTo", "youtube_id": "Axox0C6aoTo", "readable_id": "robert-campin-christ-and-the-virgin-c-1430-35"}, "sTp4cI9VyCU": {"duration": 473, "path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/total-final-velocity-for-projectile/", "keywords": "physics, kinematics, projectile, motion", "id": "sTp4cI9VyCU", "title": "Total final velocity for projectile", "description": "Calculating the total final velocity for a projectile landing at a different altitude (mistake near end: I write 29.03 when it should be 26.03 m/s and the final total magnitude should be 26.55 m/s 78.7 degrees below horizontal", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sTp4cI9VyCU.mp4/sTp4cI9VyCU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sTp4cI9VyCU.mp4/sTp4cI9VyCU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sTp4cI9VyCU.m3u8/sTp4cI9VyCU.m3u8"}, "slug": "total-final-velocity-for-projectile", "video_id": "sTp4cI9VyCU", "youtube_id": "sTp4cI9VyCU", "readable_id": "total-final-velocity-for-projectile"}, "KNr52iFk7n4": {"duration": 137, "path": "khan/math/geometry/geometric-constructions/geo-bisectors/constructing-an-angle-bisector-using-a-compass-and-straightedge/", "keywords": "", "id": "KNr52iFk7n4", "title": "Constructing an angle bisector using a compass and straightedge", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KNr52iFk7n4.mp4/KNr52iFk7n4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KNr52iFk7n4.mp4/KNr52iFk7n4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KNr52iFk7n4.m3u8/KNr52iFk7n4.m3u8"}, "slug": "constructing-an-angle-bisector-using-a-compass-and-straightedge", "video_id": "KNr52iFk7n4", "youtube_id": "KNr52iFk7n4", "readable_id": "constructing-an-angle-bisector-using-a-compass-and-straightedge"}, "zhL5DCizj5c": {"duration": 665, "path": "khan/partner-content/big-history-project/acceleration/bhp-acceleration/bhp-industrial-revolution-crashcourse/", "keywords": "", "id": "zhL5DCizj5c", "title": "Crash Course World History: The Industrial Revolution", "description": "n which John Green wraps up revolutions month with what is arguably the most revolutionary of modern revolutions, the Industrial Revolution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zhL5DCizj5c.mp4/zhL5DCizj5c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zhL5DCizj5c.mp4/zhL5DCizj5c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zhL5DCizj5c.m3u8/zhL5DCizj5c.m3u8"}, "slug": "bhp-industrial-revolution-crashcourse", "video_id": "zhL5DCizj5c", "youtube_id": "zhL5DCizj5c", "readable_id": "bhp-industrial-revolution-crashcourse"}, "rAof9Ld5sOg": {"duration": 564, "path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/calculus-derivatives-1/", "keywords": "calculus, math, derivative, khan, academy", "id": "rAof9Ld5sOg", "title": "Calculus: Derivatives 1", "description": "Finding the slope of a tangent line to a curve (the derivative). Introduction to Calculus.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rAof9Ld5sOg.mp4/rAof9Ld5sOg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rAof9Ld5sOg.mp4/rAof9Ld5sOg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rAof9Ld5sOg.m3u8/rAof9Ld5sOg.m3u8"}, "slug": "calculus-derivatives-1", "video_id": "rAof9Ld5sOg", "youtube_id": "rAof9Ld5sOg", "readable_id": "calculus-derivatives-1"}, "3281cSAuk2g": {"duration": 603, "path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-027/", "keywords": "", "id": "3281cSAuk2g", "title": "The amazing life and strange death of Captain Cook", "description": "In which John Green teaches you about the life and death of one of history's great explorers, Captain James Cook of the British Navy. He charted large swaths of the Pacific ocean, laid claim to Australia and New Zealand, and died a bizarre death in the Sandwich Islands, which are now called the Hawaiian Islands. Exactly how and why Captain Cook was killed in Hawaii is a long-running historical debate. John presents two interpretations of the event, and talks about what the differing interpretations say about history. It turns out how the story is told depends on who is doing the storytelling, and people from different backgrounds can interpret events in very different ways. Also, there is a celebration and a moustache involved in this episode, so you definitely don't want to miss it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3281cSAuk2g.mp4/3281cSAuk2g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3281cSAuk2g.mp4/3281cSAuk2g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3281cSAuk2g.m3u8/3281cSAuk2g.m3u8"}, "slug": "crash-course-world-history-027", "video_id": "3281cSAuk2g", "youtube_id": "3281cSAuk2g", "readable_id": "crash-course-world-history-027"}, "W3flX500w5g": {"duration": 532, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/linear-functions-modeling/linear-models-1/", "keywords": "", "id": "W3flX500w5g", "title": "Linear models example 1", "description": "Linear model for book reading", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W3flX500w5g.mp4/W3flX500w5g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W3flX500w5g.mp4/W3flX500w5g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W3flX500w5g.m3u8/W3flX500w5g.m3u8"}, "slug": "linear-models-1", "video_id": "W3flX500w5g", "youtube_id": "W3flX500w5g", "readable_id": "linear-models-1"}, "HtvikVD9aa0": {"duration": 238, "path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/derivative-intuition-module/", "keywords": "calculus, derivative, tangent, line", "id": "HtvikVD9aa0", "title": "Derivative intuition module", "description": "Sal walking through the derivative intuition module made by Ben Eater", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HtvikVD9aa0.mp4/HtvikVD9aa0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HtvikVD9aa0.mp4/HtvikVD9aa0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HtvikVD9aa0.m3u8/HtvikVD9aa0.m3u8"}, "slug": "derivative-intuition-module", "video_id": "HtvikVD9aa0", "youtube_id": "HtvikVD9aa0", "readable_id": "derivative-intuition-module"}, "rHonltF77zI": {"duration": 1164, "path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/linear-algebra-the-gram-schmidt-process/", "keywords": "gram, schmidt, orthonormal", "id": "rHonltF77zI", "title": "The Gram-Schmidt process", "description": "Finding an orthonormal basis for a subspace using the Gram-Schmidt Process", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rHonltF77zI.mp4/rHonltF77zI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rHonltF77zI.mp4/rHonltF77zI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rHonltF77zI.m3u8/rHonltF77zI.m3u8"}, "slug": "linear-algebra-the-gram-schmidt-process", "video_id": "rHonltF77zI", "youtube_id": "rHonltF77zI", "readable_id": "linear-algebra-the-gram-schmidt-process"}, "TUOQZjotyAQ": {"duration": 632, "path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-3-book-value-vs-market-value/", "keywords": "bailout, fed, treasury, insolvency, credit, crunch", "id": "TUOQZjotyAQ", "title": "Bailout 3: Book value vs. market value", "description": "What it means when the market value of a stock is different from its book value.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TUOQZjotyAQ.mp4/TUOQZjotyAQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TUOQZjotyAQ.mp4/TUOQZjotyAQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TUOQZjotyAQ.m3u8/TUOQZjotyAQ.m3u8"}, "slug": "bailout-3-book-value-vs-market-value", "video_id": "TUOQZjotyAQ", "youtube_id": "TUOQZjotyAQ", "readable_id": "bailout-3-book-value-vs-market-value"}, "FYTfo4y91TI": {"duration": 443, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/functional-groups/functional-groups-first/", "keywords": "", "id": "FYTfo4y91TI", "title": "Functional groups", "description": "An overview of some common functional groups", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FYTfo4y91TI.mp4/FYTfo4y91TI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FYTfo4y91TI.mp4/FYTfo4y91TI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FYTfo4y91TI.m3u8/FYTfo4y91TI.m3u8"}, "slug": "functional-groups-first", "video_id": "FYTfo4y91TI", "youtube_id": "FYTfo4y91TI", "readable_id": "functional-groups-first"}, "VNB-OVWlRbk": {"duration": 822, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony/beethoven-fourth-movement/", "keywords": "", "id": "VNB-OVWlRbk", "title": "Ludwig van Beethoven: Symphony No. 5, analysis by Gerard Schwarz (part 3 & 4 )", "description": "Watch the full performance", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VNB-OVWlRbk.mp4/VNB-OVWlRbk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VNB-OVWlRbk.mp4/VNB-OVWlRbk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VNB-OVWlRbk.m3u8/VNB-OVWlRbk.m3u8"}, "slug": "beethoven-fourth-movement", "video_id": "VNB-OVWlRbk", "youtube_id": "VNB-OVWlRbk", "readable_id": "beethoven-fourth-movement"}, "t8m0NalQtEk": {"duration": 675, "path": "khan/math/arithmetic/multiplication-division/multi_digit_multiplication/multiplication-5-2-digit-times-a-2-digit-number/", "keywords": "multiplication, CC_4_NBT_5", "id": "t8m0NalQtEk", "title": "2-digit times a 2-digit number", "description": "Multiplying a 2-digit number times a 2-digit number", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/t8m0NalQtEk.mp4/t8m0NalQtEk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/t8m0NalQtEk.mp4/t8m0NalQtEk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/t8m0NalQtEk.m3u8/t8m0NalQtEk.m3u8"}, "slug": "multiplication-5-2-digit-times-a-2-digit-number", "video_id": "t8m0NalQtEk", "youtube_id": "t8m0NalQtEk", "readable_id": "multiplication-5-2-digit-times-a-2-digit-number"}, "LSIgi9krswU": {"duration": 188, "path": "khan/math/differential-calculus/derivative_applications/absolute-relative-maxima-minima/identifying-relative-extrema/", "keywords": "", "id": "LSIgi9krswU", "title": "Identifying relative minimum and maximum values", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LSIgi9krswU.mp4/LSIgi9krswU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LSIgi9krswU.mp4/LSIgi9krswU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LSIgi9krswU.m3u8/LSIgi9krswU.m3u8"}, "slug": "identifying-relative-extrema", "video_id": "LSIgi9krswU", "youtube_id": "LSIgi9krswU", "readable_id": "identifying-relative-extrema"}, "CTKMK1ZGLuk": {"duration": 146, "path": "khan/math/pre-algebra/fractions-pre-alg/multiplying-fractions-pre-alg/multiplying-fractions/", "keywords": "U02_L2_T1_we1, Multiplying, Fractions, CC_5_NF_6, CC_7_NS_2, CC_7_NS_2_c", "id": "CTKMK1ZGLuk", "title": "Multiplying two fractions: example", "description": "Let's practice multiplying two fractions together. We'll learn to simplify the answer, too.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CTKMK1ZGLuk.mp4/CTKMK1ZGLuk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CTKMK1ZGLuk.mp4/CTKMK1ZGLuk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CTKMK1ZGLuk.m3u8/CTKMK1ZGLuk.m3u8"}, "slug": "multiplying-fractions", "video_id": "CTKMK1ZGLuk", "youtube_id": "CTKMK1ZGLuk", "readable_id": "multiplying-fractions"}, "7beFNpp4FxY": {"duration": 168, "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-pollock-one-number-31-1950/", "keywords": "", "id": "7beFNpp4FxY", "title": "Conservation | Pollock, \"One: Number 31, 1950\"", "description": "You can experiment with Pollock's famous painting technique and those of other Abstract Expressionist artists by enrolling in our online course: Materials and Techniques of Postwar Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7beFNpp4FxY.mp4/7beFNpp4FxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7beFNpp4FxY.mp4/7beFNpp4FxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7beFNpp4FxY.m3u8/7beFNpp4FxY.m3u8"}, "slug": "moma-pollock-one-number-31-1950", "video_id": "7beFNpp4FxY", "youtube_id": "7beFNpp4FxY", "readable_id": "moma-pollock-one-number-31-1950"}, "jQ-fS2lsslU": {"duration": 575, "path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/functions-as-graphs/", "keywords": "Functions, As, Graphs, CC_8_F_1, CC_39336_F-IF_7_b", "id": "jQ-fS2lsslU", "title": "Functions as graphs", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jQ-fS2lsslU.mp4/jQ-fS2lsslU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jQ-fS2lsslU.mp4/jQ-fS2lsslU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jQ-fS2lsslU.m3u8/jQ-fS2lsslU.m3u8"}, "slug": "functions-as-graphs", "video_id": "jQ-fS2lsslU", "youtube_id": "jQ-fS2lsslU", "readable_id": "functions-as-graphs"}, "GAmzwIkGFgE": {"duration": 567, "path": "khan/math/probability/regression/regression-correlation/regression-line-example/", "keywords": "Regression, Line, Example, Least, Squares, CC_8_SP_2, CC_8_SP_3", "id": "GAmzwIkGFgE", "title": "Regression line example", "description": "Regression Line Example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GAmzwIkGFgE.mp4/GAmzwIkGFgE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GAmzwIkGFgE.mp4/GAmzwIkGFgE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GAmzwIkGFgE.m3u8/GAmzwIkGFgE.m3u8"}, "slug": "regression-line-example", "video_id": "GAmzwIkGFgE", "youtube_id": "GAmzwIkGFgE", "readable_id": "regression-line-example"}, "Mm-IxK1GrYE": {"duration": 281, "path": "khan/science/biology/her/tree-of-life/human-prehistory-101-prologue/", "keywords": "genetics, DNA, ancestry, education, genes, chimpanzee, neanderthal, testing, kit, test, ancestor, genomics", "id": "Mm-IxK1GrYE", "title": "Human prehistory 101: Prologue", "description": "Award winning video introduces human prehistory starting over 200,000 years ago. Who were our first human ancestors? Where did they live?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mm-IxK1GrYE.mp4/Mm-IxK1GrYE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mm-IxK1GrYE.mp4/Mm-IxK1GrYE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mm-IxK1GrYE.m3u8/Mm-IxK1GrYE.m3u8"}, "slug": "human-prehistory-101-prologue", "video_id": "Mm-IxK1GrYE", "youtube_id": "Mm-IxK1GrYE", "readable_id": "human-prehistory-101-prologue"}, "mVFbGjnysP0": {"duration": 204, "path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-4-meters-in-6-9-and-12/", "keywords": "", "id": "mVFbGjnysP0", "title": "Lesson 4: Meters in 6, 9, and 12", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mVFbGjnysP0.mp4/mVFbGjnysP0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mVFbGjnysP0.mp4/mVFbGjnysP0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mVFbGjnysP0.m3u8/mVFbGjnysP0.m3u8"}, "slug": "lesson-4-meters-in-6-9-and-12", "video_id": "mVFbGjnysP0", "youtube_id": "mVFbGjnysP0", "readable_id": "lesson-4-meters-in-6-9-and-12"}, "nZu7IZLhJRI": {"duration": 728, "path": "khan/math/geometry/basic-geometry/heron_formula_tutorial/part-2-of-the-proof-of-heron-s-formula/", "keywords": "Heron's, Formula, geometry, triangle, area", "id": "nZu7IZLhJRI", "title": "Part 2 of proof of Heron's formula", "description": "Showing that the expression in part 1 is identical to Heron's Formula", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nZu7IZLhJRI.mp4/nZu7IZLhJRI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nZu7IZLhJRI.mp4/nZu7IZLhJRI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nZu7IZLhJRI.m3u8/nZu7IZLhJRI.m3u8"}, "slug": "part-2-of-the-proof-of-heron-s-formula", "video_id": "nZu7IZLhJRI", "youtube_id": "nZu7IZLhJRI", "readable_id": "part-2-of-the-proof-of-heron-s-formula"}, "sy3_PGIuiXs": {"duration": 309, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s1-harder/", "keywords": "", "id": "sy3_PGIuiXs", "title": "Volume word problems \u2014 Harder example", "description": "Watch Sal work through a harder Volume word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sy3_PGIuiXs.mp4/sy3_PGIuiXs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sy3_PGIuiXs.mp4/sy3_PGIuiXs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sy3_PGIuiXs.m3u8/sy3_PGIuiXs.m3u8"}, "slug": "sat-math-s1-harder", "video_id": "sy3_PGIuiXs", "youtube_id": "sy3_PGIuiXs", "readable_id": "sat-math-s1-harder"}, "ABUzqfD8vWg": {"duration": 872, "path": "khan/test-prep/mcat/behavior/learning-slug/non-associative-learning/", "keywords": "", "id": "ABUzqfD8vWg", "title": "Non associative learning", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ABUzqfD8vWg.mp4/ABUzqfD8vWg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ABUzqfD8vWg.mp4/ABUzqfD8vWg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ABUzqfD8vWg.m3u8/ABUzqfD8vWg.m3u8"}, "slug": "non-associative-learning", "video_id": "ABUzqfD8vWg", "youtube_id": "ABUzqfD8vWg", "readable_id": "non-associative-learning"}, "xPb6HLM3xEQ": {"duration": 574, "path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/ap-calculus-bc-exams-2008-1-b-c/", "keywords": "calculus, BC, exam", "id": "xPb6HLM3xEQ", "title": "AP Calculus BC exams: 2008 1 b&c", "description": "Parts b and c of problem 1 (free response)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xPb6HLM3xEQ.mp4/xPb6HLM3xEQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xPb6HLM3xEQ.mp4/xPb6HLM3xEQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xPb6HLM3xEQ.m3u8/xPb6HLM3xEQ.m3u8"}, "slug": "ap-calculus-bc-exams-2008-1-b-c", "video_id": "xPb6HLM3xEQ", "youtube_id": "xPb6HLM3xEQ", "readable_id": "ap-calculus-bc-exams-2008-1-b-c"}, "q5ArmxIXU4s": {"duration": 249, "path": "khan/test-prep/mcat/society-and-culture/social-structures/social-theories-overview-part-2/", "keywords": "", "id": "q5ArmxIXU4s", "title": "Social theories overview (part 2)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q5ArmxIXU4s.mp4/q5ArmxIXU4s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q5ArmxIXU4s.mp4/q5ArmxIXU4s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q5ArmxIXU4s.m3u8/q5ArmxIXU4s.m3u8"}, "slug": "social-theories-overview-part-2", "video_id": "q5ArmxIXU4s", "youtube_id": "q5ArmxIXU4s", "readable_id": "social-theories-overview-part-2"}, "4LSktB7Pk_c": {"duration": 611, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/present-value/present-value-2/", "keywords": "present, value, discount, cash, flow", "id": "4LSktB7Pk_c", "title": "Present value 2", "description": "More choices as to when you get your money.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4LSktB7Pk_c.mp4/4LSktB7Pk_c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4LSktB7Pk_c.mp4/4LSktB7Pk_c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4LSktB7Pk_c.m3u8/4LSktB7Pk_c.m3u8"}, "slug": "present-value-2", "video_id": "4LSktB7Pk_c", "youtube_id": "4LSktB7Pk_c", "readable_id": "present-value-2"}, "zmBV87XA52Q": {"duration": 863, "path": "khan/humanities/history/history-survey/us-history/us-history-overview-2-reconstruction-to-the-great-depression/", "keywords": "depression, spanish, american, war, cuba, jim, crow", "id": "zmBV87XA52Q", "title": "US History overview 2: Reconstruction to the Great Depression", "description": "Reconstruction to the Great Depression", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zmBV87XA52Q.mp4/zmBV87XA52Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zmBV87XA52Q.mp4/zmBV87XA52Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zmBV87XA52Q.m3u8/zmBV87XA52Q.m3u8"}, "slug": "us-history-overview-2-reconstruction-to-the-great-depression", "video_id": "zmBV87XA52Q", "youtube_id": "zmBV87XA52Q", "readable_id": "us-history-overview-2-reconstruction-to-the-great-depression"}, "2GD5PBK_Bto": {"duration": 136, "path": "khan/humanities/global-culture/conceptual-performance/moma-abramovic-live/", "keywords": "", "id": "2GD5PBK_Bto", "title": "Marina Abramovi\u0107", "description": "Can performance art be re-performed? How can it be collected by the museum? To explore what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2GD5PBK_Bto.mp4/2GD5PBK_Bto.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2GD5PBK_Bto.mp4/2GD5PBK_Bto.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2GD5PBK_Bto.m3u8/2GD5PBK_Bto.m3u8"}, "slug": "moma-abramovic-live", "video_id": "2GD5PBK_Bto", "youtube_id": "2GD5PBK_Bto", "readable_id": "moma-abramovic-live"}, "2jH_z9ra9L0": {"duration": 471, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/sn1-sn2-solvent-effects/", "keywords": "", "id": "2jH_z9ra9L0", "title": "Sn1 and Sn2 solvents effects", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2jH_z9ra9L0.mp4/2jH_z9ra9L0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2jH_z9ra9L0.mp4/2jH_z9ra9L0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2jH_z9ra9L0.m3u8/2jH_z9ra9L0.m3u8"}, "slug": "sn1-sn2-solvent-effects", "video_id": "2jH_z9ra9L0", "youtube_id": "2jH_z9ra9L0", "readable_id": "sn1-sn2-solvent-effects"}, "Y5cSGxdDHz4": {"duration": 544, "path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/projectile-motion-part-3/", "keywords": "physics, projectile, motion, acceleration, velocity, khan", "id": "Y5cSGxdDHz4", "title": "Projectile motion (part 3)", "description": "An example of solving for the final velocity when you know the change in distance, time, initial velocity, and acceleration", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y5cSGxdDHz4.mp4/Y5cSGxdDHz4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y5cSGxdDHz4.mp4/Y5cSGxdDHz4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y5cSGxdDHz4.m3u8/Y5cSGxdDHz4.m3u8"}, "slug": "projectile-motion-part-3", "video_id": "Y5cSGxdDHz4", "youtube_id": "Y5cSGxdDHz4", "readable_id": "projectile-motion-part-3"}, "6Kw2nIwWYL0": {"duration": 562, "path": "khan/math/precalculus/vectors-precalc/magnitude-direction/mag-dir-vec-sums/", "keywords": "", "id": "6Kw2nIwWYL0", "title": "Breaking down vectors into components", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6Kw2nIwWYL0.mp4/6Kw2nIwWYL0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6Kw2nIwWYL0.mp4/6Kw2nIwWYL0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6Kw2nIwWYL0.m3u8/6Kw2nIwWYL0.m3u8"}, "slug": "mag-dir-vec-sums", "video_id": "6Kw2nIwWYL0", "youtube_id": "6Kw2nIwWYL0", "readable_id": "mag-dir-vec-sums"}, "E52oU-pwDxY": {"duration": 603, "path": "khan/test-prep/mcat/chemical-processes/stereochemistry/conformations-of-ethane/", "keywords": "", "id": "E52oU-pwDxY", "title": "Conformations of ethane", "description": "How to represent the staggered and eclipsed conformations of ethane", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E52oU-pwDxY.mp4/E52oU-pwDxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E52oU-pwDxY.mp4/E52oU-pwDxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E52oU-pwDxY.m3u8/E52oU-pwDxY.m3u8"}, "slug": "conformations-of-ethane", "video_id": "E52oU-pwDxY", "youtube_id": "E52oU-pwDxY", "readable_id": "conformations-of-ethane"}, "5SHOKpT2bwg": {"duration": 197, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/renaud-laplance/kauffman-renaud-laplanche-2/", "keywords": "", "id": "5SHOKpT2bwg", "title": "Building Trust and Confidence", "description": "Renaud Laplanche was opening his mail when the idea for Lending Club came to him. He tells the story of seeing\nthe opportunity and creating the online Lending Club to fill the gap in the financial industries market. Laplache\u2019s\u00a0\ncompetitive nature extends to one-man sailboat racing and he compares the risks and rewards of racing with setting\u00a0\nthe pace as an entrepreneur.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5SHOKpT2bwg.mp4/5SHOKpT2bwg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5SHOKpT2bwg.mp4/5SHOKpT2bwg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5SHOKpT2bwg.m3u8/5SHOKpT2bwg.m3u8"}, "slug": "kauffman-renaud-laplanche-2", "video_id": "5SHOKpT2bwg", "youtube_id": "5SHOKpT2bwg", "readable_id": "kauffman-renaud-laplanche-2"}, "5B8XluiqdHM": {"duration": 1046, "path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-algebra-projections-onto-subspaces/", "keywords": "subspace, projection", "id": "5B8XluiqdHM", "title": "Projections onto subspaces", "description": "Projections onto subspaces", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5B8XluiqdHM.mp4/5B8XluiqdHM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5B8XluiqdHM.mp4/5B8XluiqdHM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5B8XluiqdHM.m3u8/5B8XluiqdHM.m3u8"}, "slug": "linear-algebra-projections-onto-subspaces", "video_id": "5B8XluiqdHM", "youtube_id": "5B8XluiqdHM", "readable_id": "linear-algebra-projections-onto-subspaces"}, "do1HDIdfQkU": {"duration": 213, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/changes-in-income-population-or-preferences/", "keywords": "economics, supply, and, demand", "id": "do1HDIdfQkU", "title": "Changes in income, population, or preferences", "description": "How demand can be affected by changes in income, population or preferences", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/do1HDIdfQkU.mp4/do1HDIdfQkU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/do1HDIdfQkU.mp4/do1HDIdfQkU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/do1HDIdfQkU.m3u8/do1HDIdfQkU.m3u8"}, "slug": "changes-in-income-population-or-preferences", "video_id": "do1HDIdfQkU", "youtube_id": "do1HDIdfQkU", "readable_id": "changes-in-income-population-or-preferences"}, "lPWfIq5DzqI": {"duration": 1072, "path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/linear-transformation-examples-rotations-in-r2/", "keywords": "linear, transformation, matrices", "id": "lPWfIq5DzqI", "title": "Linear transformation examples: Rotations in R2", "description": "Linear Transformation Examples: Rotations in R2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lPWfIq5DzqI.mp4/lPWfIq5DzqI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lPWfIq5DzqI.mp4/lPWfIq5DzqI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lPWfIq5DzqI.m3u8/lPWfIq5DzqI.m3u8"}, "slug": "linear-transformation-examples-rotations-in-r2", "video_id": "lPWfIq5DzqI", "youtube_id": "lPWfIq5DzqI", "readable_id": "linear-transformation-examples-rotations-in-r2"}, "onmNaDrxwmo": {"duration": 367, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/example-rational-functions-graphs/", "keywords": "", "id": "onmNaDrxwmo", "title": "How to match a graph of a rational function to its formula (example)", "description": "Sal matches three graphs of rational functions to three formulas of such functions by considering asymptotes and intercepts.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/onmNaDrxwmo.mp4/onmNaDrxwmo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/onmNaDrxwmo.mp4/onmNaDrxwmo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/onmNaDrxwmo.m3u8/onmNaDrxwmo.m3u8"}, "slug": "example-rational-functions-graphs", "video_id": "onmNaDrxwmo", "youtube_id": "onmNaDrxwmo", "readable_id": "example-rational-functions-graphs"}, "2WEKGlvcVEw": {"duration": 98, "path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-rube-goldberg-the-design-process/", "keywords": "", "id": "2WEKGlvcVEw", "title": "DLab: Building a Rube Goldberg machine", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2WEKGlvcVEw.mp4/2WEKGlvcVEw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2WEKGlvcVEw.mp4/2WEKGlvcVEw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2WEKGlvcVEw.m3u8/2WEKGlvcVEw.m3u8"}, "slug": "discovery-lab-rube-goldberg-the-design-process", "video_id": "2WEKGlvcVEw", "youtube_id": "2WEKGlvcVEw", "readable_id": "discovery-lab-rube-goldberg-the-design-process"}, "KZibsVxUOrw": {"duration": 583, "path": "khan/humanities/history/crashcourse-worldhistory/road-trip-conquest-trade-2/crash-course-world-history-18/", "keywords": "crash course", "id": "KZibsVxUOrw", "title": "International commerce, snorkeling camels, and the Indian Ocean Trade", "description": "In which John Green teaches you the history of the Indian Ocean Trade. John weaves a tale of swashbuckling adventure, replete with trade in books, ivory, and timber. Along the way, John manages to cover advances in seafaring technology, just how the monsoons work, and there's even a disembowelment for you Fangoria fans.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KZibsVxUOrw.mp4/KZibsVxUOrw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KZibsVxUOrw.mp4/KZibsVxUOrw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KZibsVxUOrw.m3u8/KZibsVxUOrw.m3u8"}, "slug": "crash-course-world-history-18", "video_id": "KZibsVxUOrw", "youtube_id": "KZibsVxUOrw", "readable_id": "crash-course-world-history-18"}, "xL98lBuAn1A": {"duration": 406, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/what-is-myocarditis-and-pericarditis/", "keywords": "", "id": "xL98lBuAn1A", "title": "What is myocarditis and pericarditis?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xL98lBuAn1A.mp4/xL98lBuAn1A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xL98lBuAn1A.mp4/xL98lBuAn1A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xL98lBuAn1A.m3u8/xL98lBuAn1A.m3u8"}, "slug": "what-is-myocarditis-and-pericarditis", "video_id": "xL98lBuAn1A", "youtube_id": "xL98lBuAn1A", "readable_id": "what-is-myocarditis-and-pericarditis"}, "PQsgXNggV7Q": {"duration": 128, "path": "khan/math/pre-algebra/fractions-pre-alg/div-fractions-fractions-pre-alg/dividing-fractions-word-problem/", "keywords": "U02_L2_T3_we5, Dividing, Fractions, Word, Problem", "id": "PQsgXNggV7Q", "title": "Dividing whole numbers and fractions: t-shirts", "description": "Dividing a whole number by a fraction? Turn the tables and multiply by the reciprocal of the fraction. Boom!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PQsgXNggV7Q.mp4/PQsgXNggV7Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PQsgXNggV7Q.mp4/PQsgXNggV7Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PQsgXNggV7Q.m3u8/PQsgXNggV7Q.m3u8"}, "slug": "dividing-fractions-word-problem", "video_id": "PQsgXNggV7Q", "youtube_id": "PQsgXNggV7Q", "readable_id": "dividing-fractions-word-problem"}, "X-VCk3WrGlM": {"duration": 549, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions/markovnikov-s-rule-and-carbocations/", "keywords": "Markovnikov's, Rule, and, Carbocations", "id": "X-VCk3WrGlM", "title": "Markovnikov's rule and carbocations", "description": "Markovnikov's Rule and Carbocations. Figuring out which addition reaction is more likely.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X-VCk3WrGlM.mp4/X-VCk3WrGlM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X-VCk3WrGlM.mp4/X-VCk3WrGlM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X-VCk3WrGlM.m3u8/X-VCk3WrGlM.m3u8"}, "slug": "markovnikov-s-rule-and-carbocations", "video_id": "X-VCk3WrGlM", "youtube_id": "X-VCk3WrGlM", "readable_id": "markovnikov-s-rule-and-carbocations"}, "MeVFZjT-ABM": {"duration": 470, "path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/l-hopital-s-rule-example-3/", "keywords": "L'Hopital's, Rule, Example", "id": "MeVFZjT-ABM", "title": "L'H\u00f4pital's rule example 3", "description": "L'H\u00f4pital's Rule Example 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MeVFZjT-ABM.mp4/MeVFZjT-ABM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MeVFZjT-ABM.mp4/MeVFZjT-ABM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MeVFZjT-ABM.m3u8/MeVFZjT-ABM.m3u8"}, "slug": "l-hopital-s-rule-example-3", "video_id": "MeVFZjT-ABM", "youtube_id": "MeVFZjT-ABM", "readable_id": "l-hopital-s-rule-example-3"}, "BXzR-hdSFUY": {"duration": 224, "path": "khan/humanities/becoming-modern/avant-garde-france/realism/manet-corner-of-a-caf-concert-1878-80/", "keywords": "Manet, Realism, Impressionism, art history, smarthistory, National Gallery, London, Cafe", "id": "BXzR-hdSFUY", "title": "Manet, Corner of a Caf\u00e9-Concert", "description": "Edouard Manet, Corner of a Caf\u00e9-Concert, 1878-80, 97.1 x 77.5 cm (National Gallery, London)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BXzR-hdSFUY.mp4/BXzR-hdSFUY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BXzR-hdSFUY.mp4/BXzR-hdSFUY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BXzR-hdSFUY.m3u8/BXzR-hdSFUY.m3u8"}, "slug": "manet-corner-of-a-caf-concert-1878-80", "video_id": "BXzR-hdSFUY", "youtube_id": "BXzR-hdSFUY", "readable_id": "manet-corner-of-a-caf-concert-1878-80"}, "NhkfQEkmwlE": {"duration": 171, "path": "khan/college-admissions/making-high-school-count/standardized-tests/overview-of-sat/", "keywords": "", "id": "NhkfQEkmwlE", "title": "Overview of the SAT", "description": "Official SAT Website\u00a0| Khan Academy SAT Prep", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NhkfQEkmwlE.mp4/NhkfQEkmwlE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NhkfQEkmwlE.mp4/NhkfQEkmwlE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NhkfQEkmwlE.m3u8/NhkfQEkmwlE.m3u8"}, "slug": "overview-of-sat", "video_id": "NhkfQEkmwlE", "youtube_id": "NhkfQEkmwlE", "readable_id": "overview-of-sat"}, "pBZ-RiT5nEE": {"duration": 516, "path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/intermolecular-forces-and-molecular-bonds/", "keywords": "", "id": "pBZ-RiT5nEE", "title": "Intermolecular forces", "description": "Identifying the intermolecular forces present between molecules", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pBZ-RiT5nEE.mp4/pBZ-RiT5nEE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pBZ-RiT5nEE.mp4/pBZ-RiT5nEE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pBZ-RiT5nEE.m3u8/pBZ-RiT5nEE.m3u8"}, "slug": "intermolecular-forces-and-molecular-bonds", "video_id": "pBZ-RiT5nEE", "youtube_id": "pBZ-RiT5nEE", "readable_id": "intermolecular-forces-and-molecular-bonds"}, "FERlpfxuS6o": {"duration": 270, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-9-15/", "keywords": "", "id": "FERlpfxuS6o", "title": "15 Linear model", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FERlpfxuS6o.mp4/FERlpfxuS6o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FERlpfxuS6o.mp4/FERlpfxuS6o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FERlpfxuS6o.m3u8/FERlpfxuS6o.m3u8"}, "slug": "sat-2010-may-9-15", "video_id": "FERlpfxuS6o", "youtube_id": "FERlpfxuS6o", "readable_id": "sat-2010-may-9-15"}, "1q3axPjwLrE": {"duration": 163, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h7-easier/", "keywords": "", "id": "1q3axPjwLrE", "title": "Solving systems of linear equations \u2014 Basic example", "description": "Watch Sal work through a basic Solving systems of linear equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1q3axPjwLrE.mp4/1q3axPjwLrE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1q3axPjwLrE.mp4/1q3axPjwLrE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1q3axPjwLrE.m3u8/1q3axPjwLrE.m3u8"}, "slug": "sat-math-h7-easier", "video_id": "1q3axPjwLrE", "youtube_id": "1q3axPjwLrE", "readable_id": "sat-math-h7-easier"}, "Q59w-ACX30M": {"duration": 637, "path": "khan/test-prep/gmat/problem-solving/gmat-math-6/", "keywords": "GMAT, problem, solving, math", "id": "Q59w-ACX30M", "title": "GMAT: Math 6", "description": "30-35, pg. 156", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q59w-ACX30M.mp4/Q59w-ACX30M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q59w-ACX30M.mp4/Q59w-ACX30M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q59w-ACX30M.m3u8/Q59w-ACX30M.m3u8"}, "slug": "gmat-math-6", "video_id": "Q59w-ACX30M", "youtube_id": "Q59w-ACX30M", "readable_id": "gmat-math-6"}, "tQcB9BLUoVI": {"duration": 589, "path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/thermodynamics-part-1/", "keywords": "physics, chemistry, thermodynamics, pressure, volume, Boyle's, Law", "id": "tQcB9BLUoVI", "title": "Thermodynamics part 1: Molecular theory of gases", "description": "Intuition of how gases generate pressure in a container and why pressure x volume is proportional to the combined kinetic energy of the molecules in the volume.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tQcB9BLUoVI.mp4/tQcB9BLUoVI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tQcB9BLUoVI.mp4/tQcB9BLUoVI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tQcB9BLUoVI.m3u8/tQcB9BLUoVI.m3u8"}, "slug": "thermodynamics-part-1", "video_id": "tQcB9BLUoVI", "youtube_id": "tQcB9BLUoVI", "readable_id": "thermodynamics-part-1"}, "mMzbr5rm4j8": {"duration": 578, "path": "khan/science/chemistry/oxidation-reduction/cell-potentials-under-nonstandard-conditions/concentration-cell/", "keywords": "", "id": "mMzbr5rm4j8", "title": "Concentration cell", "description": "Using the Nernst equation to calculate cell potential for a concentration cell.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mMzbr5rm4j8.mp4/mMzbr5rm4j8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mMzbr5rm4j8.mp4/mMzbr5rm4j8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mMzbr5rm4j8.m3u8/mMzbr5rm4j8.m3u8"}, "slug": "concentration-cell", "video_id": "mMzbr5rm4j8", "youtube_id": "mMzbr5rm4j8", "readable_id": "concentration-cell"}, "Dnxm4UQPDTo": {"duration": 369, "path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/pentecost-and-mission-to-the-apostles-tympanum-v-zelay/", "keywords": "Pentecost, sculpture, crusades, Mission, Apostles, Tympanum, portal, narthex, Basilica Ste-Madeleine, V\u00e9zelay, France, 1120", "id": "Dnxm4UQPDTo", "title": "Pentecost and Mission to the Apostles Tympanum, V\u00e9zelay", "description": "Pentecost and Mission to the Apostles Tympanum, central portal of the narthex, Basilica Ste-Madeleine, V\u00e9zelay, France, 1120-32 Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Dnxm4UQPDTo.mp4/Dnxm4UQPDTo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Dnxm4UQPDTo.mp4/Dnxm4UQPDTo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Dnxm4UQPDTo.m3u8/Dnxm4UQPDTo.m3u8"}, "slug": "pentecost-and-mission-to-the-apostles-tympanum-v-zelay", "video_id": "Dnxm4UQPDTo", "youtube_id": "Dnxm4UQPDTo", "readable_id": "pentecost-and-mission-to-the-apostles-tympanum-v-zelay"}, "CzDA0WCdWHQ": {"duration": 262, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/mergers-acquisitions/simple-merger-arb-with-share-acquisition/", "keywords": "hedge, funds, capital, markets, finance", "id": "CzDA0WCdWHQ", "title": "Simple merger arbitrage with share acquisition", "description": "Showing how a merger arbitrage player might act if they were sure that a transaction would go through", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CzDA0WCdWHQ.mp4/CzDA0WCdWHQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CzDA0WCdWHQ.mp4/CzDA0WCdWHQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CzDA0WCdWHQ.m3u8/CzDA0WCdWHQ.m3u8"}, "slug": "simple-merger-arb-with-share-acquisition", "video_id": "CzDA0WCdWHQ", "youtube_id": "CzDA0WCdWHQ", "readable_id": "simple-merger-arb-with-share-acquisition"}, "R_-V6usZJsc": {"duration": 202, "path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/chinese-inflation/", "keywords": "Chinese, inflation", "id": "R_-V6usZJsc", "title": "Chinese inflation", "description": "Chinese inflation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R_-V6usZJsc.mp4/R_-V6usZJsc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R_-V6usZJsc.mp4/R_-V6usZJsc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R_-V6usZJsc.m3u8/R_-V6usZJsc.m3u8"}, "slug": "chinese-inflation", "video_id": "R_-V6usZJsc", "youtube_id": "R_-V6usZJsc", "readable_id": "chinese-inflation"}, "roUGDG1rhPI": {"duration": 659, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-properties-ethers/ether-naming-and-introduction/", "keywords": "Ether, Naming, aprotic, boiling, melting, point", "id": "roUGDG1rhPI", "title": "Ether naming and introduction", "description": "Ether Naming and Introduction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/roUGDG1rhPI.mp4/roUGDG1rhPI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/roUGDG1rhPI.mp4/roUGDG1rhPI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/roUGDG1rhPI.m3u8/roUGDG1rhPI.m3u8"}, "slug": "ether-naming-and-introduction", "video_id": "roUGDG1rhPI", "youtube_id": "roUGDG1rhPI", "readable_id": "ether-naming-and-introduction"}, "IGs7IB48Fvg": {"duration": 84, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials/polynomials-2/", "keywords": "U08_L2_T1_we2, Polynomials, CC_6_EE_2_c, CC_39336_A-APR_1", "id": "IGs7IB48Fvg", "title": "Example 2: Modeling with polynomials", "description": "Write a polynomial to express the total value of p twenty dollar bills, q ten dollar bills, and r five dollar bills.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IGs7IB48Fvg.mp4/IGs7IB48Fvg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IGs7IB48Fvg.mp4/IGs7IB48Fvg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IGs7IB48Fvg.m3u8/IGs7IB48Fvg.m3u8"}, "slug": "polynomials-2", "video_id": "IGs7IB48Fvg", "youtube_id": "IGs7IB48Fvg", "readable_id": "polynomials-2"}, "GiGLhXFBtRg": {"duration": 539, "path": "khan/math/geometry/triangle-properties/medians_centroids/triangle-medians-and-centroids/", "keywords": "geometry, centroid, median, CC_8_G_5", "id": "GiGLhXFBtRg", "title": "Triangle medians and centroids", "description": "Seeing that the centroid is 2/3 of the way along every median", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GiGLhXFBtRg.mp4/GiGLhXFBtRg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GiGLhXFBtRg.mp4/GiGLhXFBtRg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GiGLhXFBtRg.m3u8/GiGLhXFBtRg.m3u8"}, "slug": "triangle-medians-and-centroids", "video_id": "GiGLhXFBtRg", "youtube_id": "GiGLhXFBtRg", "readable_id": "triangle-medians-and-centroids"}, "TjYbFdSY0LA": {"duration": 668, "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/what-is-skin/", "keywords": "", "id": "TjYbFdSY0LA", "title": "What is skin? (Epidermis)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TjYbFdSY0LA.mp4/TjYbFdSY0LA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TjYbFdSY0LA.mp4/TjYbFdSY0LA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TjYbFdSY0LA.m3u8/TjYbFdSY0LA.m3u8"}, "slug": "what-is-skin", "video_id": "TjYbFdSY0LA", "youtube_id": "TjYbFdSY0LA", "readable_id": "what-is-skin"}, "p-cZzHxVoG8": {"duration": 216, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/giles-shih/kauffman-giles-shih3/", "keywords": "", "id": "p-cZzHxVoG8", "title": "Giles Shih - Making an idea into a business", "description": "Giles Shih, President and CEO of BioResource International, talks about his company\u2019s origins including founding along with his father. Giles also advises entrepreneurs to get out there and learn as you go.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p-cZzHxVoG8.mp4/p-cZzHxVoG8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p-cZzHxVoG8.mp4/p-cZzHxVoG8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p-cZzHxVoG8.m3u8/p-cZzHxVoG8.m3u8"}, "slug": "kauffman-giles-shih3", "video_id": "p-cZzHxVoG8", "youtube_id": "p-cZzHxVoG8", "readable_id": "kauffman-giles-shih3"}, "CCAYcuCWOnM": {"duration": 170, "path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/x-rays/", "keywords": "", "id": "CCAYcuCWOnM", "title": "X-rays (1895)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CCAYcuCWOnM.mp4/CCAYcuCWOnM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CCAYcuCWOnM.mp4/CCAYcuCWOnM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CCAYcuCWOnM.m3u8/CCAYcuCWOnM.m3u8"}, "slug": "x-rays", "video_id": "CCAYcuCWOnM", "youtube_id": "CCAYcuCWOnM", "readable_id": "x-rays"}, "sHbX58y5D4U": {"duration": 152, "path": "khan/math/probability/regression/prob-stats-scatter-plots/constructing-scatter-plot/", "keywords": "", "id": "sHbX58y5D4U", "title": "Constructing a scatter plot", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sHbX58y5D4U.mp4/sHbX58y5D4U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sHbX58y5D4U.mp4/sHbX58y5D4U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sHbX58y5D4U.m3u8/sHbX58y5D4U.m3u8"}, "slug": "constructing-scatter-plot", "video_id": "sHbX58y5D4U", "youtube_id": "sHbX58y5D4U", "readable_id": "constructing-scatter-plot"}, "tdp22elrY7s": {"duration": 240, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/botticelli-the-birth-of-venus-1483-85/", "keywords": "Botticelli, Venus, Birth of Venus, Smarthistory, Khan Academy, Uffizi, Florence, Renaissance", "id": "tdp22elrY7s", "title": "Botticelli, Birth of Venus", "description": "Sandro Botticelli, The Birth of Venus, 1483-85, tempera on panel, 68 x 109 5/8\" (172.5 x 278.5 cm), Galeria degli Uffizi, Florence Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tdp22elrY7s.mp4/tdp22elrY7s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tdp22elrY7s.mp4/tdp22elrY7s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tdp22elrY7s.m3u8/tdp22elrY7s.m3u8"}, "slug": "botticelli-the-birth-of-venus-1483-85", "video_id": "tdp22elrY7s", "youtube_id": "tdp22elrY7s", "readable_id": "botticelli-the-birth-of-venus-1483-85"}, "3-xfmbdzkqc": {"duration": 874, "path": "khan/math/linear-algebra/alternate_bases/eigen_everything/linear-algebra-finding-eigenvectors-and-eigenspaces-example/", "keywords": "eigenvalue, eigenvector, eigenspace", "id": "3-xfmbdzkqc", "title": "Finding eigenvectors and eigenspaces example", "description": "Finding the eigenvectors and eigenspaces of a 2x2 matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3-xfmbdzkqc.mp4/3-xfmbdzkqc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3-xfmbdzkqc.mp4/3-xfmbdzkqc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3-xfmbdzkqc.m3u8/3-xfmbdzkqc.m3u8"}, "slug": "linear-algebra-finding-eigenvectors-and-eigenspaces-example", "video_id": "3-xfmbdzkqc", "youtube_id": "3-xfmbdzkqc", "readable_id": "linear-algebra-finding-eigenvectors-and-eigenspaces-example"}, "QiwfF83NWNA": {"duration": 380, "path": "khan/math/precalculus/imaginary_complex_precalc/i_precalc/calculating-i-raised-to-arbitrary-exponents/", "keywords": "complex, imaginary, numbers", "id": "QiwfF83NWNA", "title": "Calculating i raised to arbitrary exponents", "description": "Calculating i raised to arbitrarily high exponents", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QiwfF83NWNA.mp4/QiwfF83NWNA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QiwfF83NWNA.mp4/QiwfF83NWNA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QiwfF83NWNA.m3u8/QiwfF83NWNA.m3u8"}, "slug": "calculating-i-raised-to-arbitrary-exponents", "video_id": "QiwfF83NWNA", "youtube_id": "QiwfF83NWNA", "readable_id": "calculating-i-raised-to-arbitrary-exponents"}, "PPvd4X3Wv5I": {"duration": 191, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/ex-1-multi-step-equation/", "keywords": "", "id": "PPvd4X3Wv5I", "title": "How to solve an equation with one rational expression (example)", "description": "Sal solves the equation (14x+4)/(-3x-2)=8.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PPvd4X3Wv5I.mp4/PPvd4X3Wv5I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PPvd4X3Wv5I.mp4/PPvd4X3Wv5I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PPvd4X3Wv5I.m3u8/PPvd4X3Wv5I.m3u8"}, "slug": "ex-1-multi-step-equation", "video_id": "PPvd4X3Wv5I", "youtube_id": "PPvd4X3Wv5I", "readable_id": "ex-1-multi-step-equation"}, "DIjlllgq3dc": {"duration": 310, "path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/permutations-and-combinations-4/", "keywords": "U12_L2_T4_we1, Permutations, and, Combinations", "id": "DIjlllgq3dc", "title": "Example: Lottery probability", "description": "What is the probability of winning a 4-number lottery?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DIjlllgq3dc.mp4/DIjlllgq3dc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DIjlllgq3dc.mp4/DIjlllgq3dc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DIjlllgq3dc.m3u8/DIjlllgq3dc.m3u8"}, "slug": "permutations-and-combinations-4", "video_id": "DIjlllgq3dc", "youtube_id": "DIjlllgq3dc", "readable_id": "permutations-and-combinations-4"}, "8_fT1BsTmt4": {"duration": 268, "path": "khan/math/arithmetic/addition-subtraction/sub_borrowing/borrowing-once-example-2/", "keywords": "", "id": "8_fT1BsTmt4", "title": "Borrowing once example 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8_fT1BsTmt4.mp4/8_fT1BsTmt4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8_fT1BsTmt4.mp4/8_fT1BsTmt4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8_fT1BsTmt4.m3u8/8_fT1BsTmt4.m3u8"}, "slug": "borrowing-once-example-2", "video_id": "8_fT1BsTmt4", "youtube_id": "8_fT1BsTmt4", "readable_id": "borrowing-once-example-2"}, "EXLVMGSDQbI": {"duration": 254, "path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/maximizing-function-at-value/", "keywords": "", "id": "EXLVMGSDQbI", "title": "Maximizing function at value", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EXLVMGSDQbI.mp4/EXLVMGSDQbI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EXLVMGSDQbI.mp4/EXLVMGSDQbI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EXLVMGSDQbI.m3u8/EXLVMGSDQbI.m3u8"}, "slug": "maximizing-function-at-value", "video_id": "EXLVMGSDQbI", "youtube_id": "EXLVMGSDQbI", "readable_id": "maximizing-function-at-value"}, "ZXJMwIDx29Q": {"duration": 345, "path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/the-wise-and-foolish-virgins-late-11th-century-early-12th-century/", "keywords": "Romanesque, wise and foolish virgins, fresco, NMAC, smarthistory, art history, history of art, Middle Ages, Barcelona", "id": "ZXJMwIDx29Q", "title": "Wise and Foolish Virgins, Sant Quirze de Pedret", "description": "Circle of the Master of Pedret, The Wise and Foolish Virgins, south apse of the Epistle, Sant Quirze de Pedret, late 11th century to the beginning of 12th century, fresco transferred to canvas\n325 x 315 x 320 cm (Museu Nacional d'Art de Catalunya, Barcelona)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZXJMwIDx29Q.mp4/ZXJMwIDx29Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZXJMwIDx29Q.mp4/ZXJMwIDx29Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZXJMwIDx29Q.m3u8/ZXJMwIDx29Q.m3u8"}, "slug": "the-wise-and-foolish-virgins-late-11th-century-early-12th-century", "video_id": "ZXJMwIDx29Q", "youtube_id": "ZXJMwIDx29Q", "readable_id": "the-wise-and-foolish-virgins-late-11th-century-early-12th-century"}, "kFp7D0UxNxU": {"duration": 172, "path": "khan/test-prep/ap-art-history/south-east-se-asia/china-art/longmen-grottoes-unesconhk/", "keywords": "", "id": "kFp7D0UxNxU", "title": "Longmen Grottoes (UNESCO/NHK)", "description": "The grottoes and niches of Longmen contain the largest and most impressive collection of Chinese art of the late Northern Wei and Tang Dynasties (316-907). These works, entirely devoted to the Buddhist religion, represent the high point of Chinese stone carving.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kFp7D0UxNxU.mp4/kFp7D0UxNxU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kFp7D0UxNxU.mp4/kFp7D0UxNxU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kFp7D0UxNxU.m3u8/kFp7D0UxNxU.m3u8"}, "slug": "longmen-grottoes-unesconhk", "video_id": "kFp7D0UxNxU", "youtube_id": "kFp7D0UxNxU", "readable_id": "longmen-grottoes-unesconhk"}, "EqNzr56h1Ic": {"duration": 607, "path": "khan/math/geometry/similarity/cc-solving-prob-similar-tri/finding-area-using-similarity-and-congruence/", "keywords": "Finding, Area, Using, Similarity, and, Congruence", "id": "EqNzr56h1Ic", "title": "Finding area using similarity and congruence", "description": "Example of using similarity and congruence to find the area of a triangle", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EqNzr56h1Ic.mp4/EqNzr56h1Ic.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EqNzr56h1Ic.mp4/EqNzr56h1Ic.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EqNzr56h1Ic.m3u8/EqNzr56h1Ic.m3u8"}, "slug": "finding-area-using-similarity-and-congruence", "video_id": "EqNzr56h1Ic", "youtube_id": "EqNzr56h1Ic", "readable_id": "finding-area-using-similarity-and-congruence"}, "0sCttufU-jQ": {"duration": 510, "path": "khan/math/differential-calculus/limits_topic/epsilon_delta/proving-a-limit-using-epsilon-delta-definition/", "keywords": "", "id": "0sCttufU-jQ", "title": "Proving a limit using epsilon-delta definition", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0sCttufU-jQ.mp4/0sCttufU-jQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0sCttufU-jQ.mp4/0sCttufU-jQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0sCttufU-jQ.m3u8/0sCttufU-jQ.m3u8"}, "slug": "proving-a-limit-using-epsilon-delta-definition", "video_id": "0sCttufU-jQ", "youtube_id": "0sCttufU-jQ", "readable_id": "proving-a-limit-using-epsilon-delta-definition"}, "oEgeUk_Ix2c": {"duration": 107, "path": "khan/math/algebra-basics/core-algebra-foundations/world-of-exponents-college-readiness/powers-of-fractions/", "keywords": "", "id": "oEgeUk_Ix2c", "title": "Powers of fractions", "description": "Just like whole numbers with exponents, fractions are repeatedly multiplied. If you know how to multiply factions, you're over half way there.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oEgeUk_Ix2c.mp4/oEgeUk_Ix2c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oEgeUk_Ix2c.mp4/oEgeUk_Ix2c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oEgeUk_Ix2c.m3u8/oEgeUk_Ix2c.m3u8"}, "slug": "powers-of-fractions", "video_id": "oEgeUk_Ix2c", "youtube_id": "oEgeUk_Ix2c", "readable_id": "powers-of-fractions"}, "OQEWArXaCeg": {"duration": 134, "path": "khan/humanities/renaissance-reformation/northern/durer/d-rer-self-portrait-1498/", "keywords": "art, durer, smarthistory, art history, self-portrait", "id": "OQEWArXaCeg", "title": "D\u00fcrer, Self-portrait (1498)", "description": "Albrecht D\u00fcrer, Self-portrait, 1498, oil on panel, 52 x 41 cm \n(Museo Nacional del Prado, Madrid)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nhttp://www.smarthistory.org/durer-self-portrait.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OQEWArXaCeg.mp4/OQEWArXaCeg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OQEWArXaCeg.mp4/OQEWArXaCeg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OQEWArXaCeg.m3u8/OQEWArXaCeg.m3u8"}, "slug": "d-rer-self-portrait-1498", "video_id": "OQEWArXaCeg", "youtube_id": "OQEWArXaCeg", "readable_id": "d-rer-self-portrait-1498"}, "7WloKabLhII": {"duration": 133, "path": "khan/math/pre-algebra/measurement/volume-introduction-rectangular/measuring-volume-with-unit-cubes/", "keywords": "", "id": "7WloKabLhII", "title": "Volume: measuring with unit cubes", "description": "Volume is usually measured in cubic feet (or inches, or centimeters, etc). Let's practice counting cubic feet in order to find the volume.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7WloKabLhII.mp4/7WloKabLhII.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7WloKabLhII.mp4/7WloKabLhII.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7WloKabLhII.m3u8/7WloKabLhII.m3u8"}, "slug": "measuring-volume-with-unit-cubes", "video_id": "7WloKabLhII", "youtube_id": "7WloKabLhII", "readable_id": "measuring-volume-with-unit-cubes"}, "4htSVI5E9AQ": {"duration": 435, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/neuron-resting-potential-description/", "keywords": "", "id": "4htSVI5E9AQ", "title": "Neuron resting potential description", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4htSVI5E9AQ.mp4/4htSVI5E9AQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4htSVI5E9AQ.mp4/4htSVI5E9AQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4htSVI5E9AQ.m3u8/4htSVI5E9AQ.m3u8"}, "slug": "neuron-resting-potential-description", "video_id": "4htSVI5E9AQ", "youtube_id": "4htSVI5E9AQ", "readable_id": "neuron-resting-potential-description"}, "Rx1HtFtc1cM": {"duration": 217, "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/gros-napoleon-bonaparte-visiting-the-pest-house-in-jaffa-1804/", "keywords": "Gros, Jaffa, Napoleon, Romanticism, Louvre, smarthistory, art history", "id": "Rx1HtFtc1cM", "title": "Gros, Napoleon Bonaparte Visiting the Plague-Stricken in Jaffa", "description": "Baron Antoine-Jean Gros, Napoleon Bonaparte Visiting the Pest House in Jaffa, 1804, oil on canvas, 209 x 280 inches (Mus\u00e9e du Louvre, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nNote: Gros was a student of the Neo-Classical painter David, however, this painting, sometimes also titled, \u00a0Napoleon Visiting the Pest House in Jaffa, is a proto-Romantic painting that points to the later style of Gericault and Delacroix.\u00a0Gros was trained in David's studio between 1785-1792, and is most well known for recording Napoleon's military campaigns, which proved to be ideal subjects for exploring the exotic, violent, and heroic. In this painting, which measures more than 17 feet high and 23 feet wide, Gros depicted a legendary episode from Napoleon's campaigns in Egypt (1798-1801). On March 21, 1799, \u00a0in a make-shift hospital in Jaffa, Napoleon visited his troops who were stricken with the Bubonic Plague. Gros depicts Napoleon attempting to calm the growing panic about contagion by fearlessly \u00a0touching the sores of one of the plague victims. Like earlier neoclassical paintings such as David's Death of Marat, Gros combines Christian iconography, in this case Christ healing the sick, with a contemporary subject. He also draws on the art of classical antiquity, by depicting Napoleon in the same position as the ancient Greek sculpture, the Apollo Belvedere. In this way, he imbues Napoleon with divine qualities while simultaneously showing him as a military hero. But in contrast to David, Gros uses warm, sensual colors and focuses on the dead and dying who occupy the foreground of the painting. We see the same approach later in Delacroix's painting ofLiberty Leading the People (1830). Napoleon was a master at using art to manipulate his public image. In reality he had ordered the death of the prisoners who he could not afford to house or feed, and poisoned his troops who were dying from the plague as he retreated from Jaffa.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Rx1HtFtc1cM.mp4/Rx1HtFtc1cM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Rx1HtFtc1cM.mp4/Rx1HtFtc1cM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Rx1HtFtc1cM.m3u8/Rx1HtFtc1cM.m3u8"}, "slug": "gros-napoleon-bonaparte-visiting-the-pest-house-in-jaffa-1804", "video_id": "Rx1HtFtc1cM", "youtube_id": "Rx1HtFtc1cM", "readable_id": "gros-napoleon-bonaparte-visiting-the-pest-house-in-jaffa-1804"}, "8lUB2sAQkzw": {"duration": 404, "path": "khan/test-prep/mcat/chemical-processes/enzymes/the-induced-fit-model-of-enzyme-catalysis/", "keywords": "", "id": "8lUB2sAQkzw", "title": "Induced fit model of enzyme catalysis", "description": "Get a better appreciation for how enzymes and substrates bind together. By Ross Firestone.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8lUB2sAQkzw.mp4/8lUB2sAQkzw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8lUB2sAQkzw.mp4/8lUB2sAQkzw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8lUB2sAQkzw.m3u8/8lUB2sAQkzw.m3u8"}, "slug": "the-induced-fit-model-of-enzyme-catalysis", "video_id": "8lUB2sAQkzw", "youtube_id": "8lUB2sAQkzw", "readable_id": "the-induced-fit-model-of-enzyme-catalysis"}, "VkrOYs2LFNk": {"duration": 252, "path": "khan/science/organic-chemistry/organic-structures/acid-base-review/stabilization-of-a-conjugate-base-electronegativity-new/", "keywords": "", "id": "VkrOYs2LFNk", "title": "Stabilization of a conjugate base: electronegativity", "description": "How electronegativity affects the stabilization of a conjugate base (when comparing elements in the same period)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VkrOYs2LFNk.mp4/VkrOYs2LFNk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VkrOYs2LFNk.mp4/VkrOYs2LFNk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VkrOYs2LFNk.m3u8/VkrOYs2LFNk.m3u8"}, "slug": "stabilization-of-a-conjugate-base-electronegativity-new", "video_id": "VkrOYs2LFNk", "youtube_id": "VkrOYs2LFNk", "readable_id": "stabilization-of-a-conjugate-base-electronegativity-new"}, "FZ2APP6-grU": {"duration": 129, "path": "khan/math/algebra/linear_inequalities/inequalities/inequalities/", "keywords": "Inequalities, CC_6_EE_8, CC_7_EE_4, CC_7_EE_4_b, CC_39336_A-CED_1, CC_39336_A-REI_3", "id": "FZ2APP6-grU", "title": "Constructing and solving a one-step inequality", "description": "Inequalities are more than abstract concepts and exercises. They help solve real life problems. Here's an example.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FZ2APP6-grU.mp4/FZ2APP6-grU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FZ2APP6-grU.mp4/FZ2APP6-grU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FZ2APP6-grU.m3u8/FZ2APP6-grU.m3u8"}, "slug": "inequalities", "video_id": "FZ2APP6-grU", "youtube_id": "FZ2APP6-grU", "readable_id": "inequalities"}, "W6gKc7Yjig8": {"duration": 778, "path": "khan/partner-content/brookings-institution/introduction-to-healthcare/private-health-insurance/", "keywords": "", "id": "W6gKc7Yjig8", "title": "Private health insurance", "description": "Approximately half of Americans rely on their employers to help obtain and pay for health coverage. This video explains the history of private insurance, how risk-sharing works, and the incentives for employers and employees to share the responsibility of health care coverage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W6gKc7Yjig8.mp4/W6gKc7Yjig8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W6gKc7Yjig8.mp4/W6gKc7Yjig8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W6gKc7Yjig8.m3u8/W6gKc7Yjig8.m3u8"}, "slug": "private-health-insurance", "video_id": "W6gKc7Yjig8", "youtube_id": "W6gKc7Yjig8", "readable_id": "private-health-insurance"}, "8jFxkEQacVA": {"duration": 467, "path": "khan/humanities/art-asia/imperial-china/northern-qi/bodhisattva-probably-avalokiteshvara-guanyin-northern-qi-dynasty-c-550-60/", "keywords": "Bodhisattva, Avalokiteshvara, Guanyin, Northern Qi, 550, 560, Shanxi, China, sandstone, Metropolitan Museum, New York, Sculpture, Monumental, Buddhist, Google Art Project, Khan Academy, Smarthistory, OER, Art History, Non-Western, art", "id": "8jFxkEQacVA", "title": "Bodhisattva", "description": "Bodhisattva, probably Avalokiteshvara (Guanyin), Northern Qi dynasty, c. 550-60, Shanxi Province, China, sandstone with pigments, 13-3/4 feet / 419.1 cm high (Metropolitan Museum of Art, New York)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8jFxkEQacVA.mp4/8jFxkEQacVA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8jFxkEQacVA.mp4/8jFxkEQacVA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8jFxkEQacVA.m3u8/8jFxkEQacVA.m3u8"}, "slug": "bodhisattva-probably-avalokiteshvara-guanyin-northern-qi-dynasty-c-550-60", "video_id": "8jFxkEQacVA", "youtube_id": "8jFxkEQacVA", "readable_id": "bodhisattva-probably-avalokiteshvara-guanyin-northern-qi-dynasty-c-550-60"}, "hy_bDS3aHO4": {"duration": 139, "path": "khan/math/pre-algebra/decimals-pre-alg/adding-decimals-pre-alg/subtracting-decimals-word-problem/", "keywords": "U03_L2_T1_we3, Subtracting, Decimals, Word, Problem, CC_5_NBT_7, CC_6_NS_3", "id": "hy_bDS3aHO4", "title": "Adding and subtracting decimals word problem", "description": "Let's get fancy and practice adding and subtracting decimals in the same word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hy_bDS3aHO4.mp4/hy_bDS3aHO4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hy_bDS3aHO4.mp4/hy_bDS3aHO4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hy_bDS3aHO4.m3u8/hy_bDS3aHO4.m3u8"}, "slug": "subtracting-decimals-word-problem", "video_id": "hy_bDS3aHO4", "youtube_id": "hy_bDS3aHO4", "readable_id": "subtracting-decimals-word-problem"}, "CFvVkPNV7cI": {"duration": 97, "path": "khan/college-admissions/applying-to-college/college-application-process/applying-to-the-right-number-of-colleges/", "keywords": "", "id": "CFvVkPNV7cI", "title": "Applying to the right number of colleges", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CFvVkPNV7cI.mp4/CFvVkPNV7cI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CFvVkPNV7cI.mp4/CFvVkPNV7cI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CFvVkPNV7cI.m3u8/CFvVkPNV7cI.m3u8"}, "slug": "applying-to-the-right-number-of-colleges", "video_id": "CFvVkPNV7cI", "youtube_id": "CFvVkPNV7cI", "readable_id": "applying-to-the-right-number-of-colleges"}, "qyQGBJIYC5s": {"duration": 513, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/rubens-elevation/", "keywords": "", "id": "qyQGBJIYC5s", "title": "Peter Paul Rubens, Elevation of the Cross", "description": "Peter Paul Rubens, Elevation of the Cross, 1610, oil on wood, 15 feet 1-7/8 inches x 11 feet 1-1/2 inches (originally for Saint Walpurgis (destroyed),\u00a0now in Antwerp Cathedral)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qyQGBJIYC5s.mp4/qyQGBJIYC5s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qyQGBJIYC5s.mp4/qyQGBJIYC5s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qyQGBJIYC5s.m3u8/qyQGBJIYC5s.m3u8"}, "slug": "rubens-elevation", "video_id": "qyQGBJIYC5s", "youtube_id": "qyQGBJIYC5s", "readable_id": "rubens-elevation"}, "70aWb6xBrbg": {"duration": 262, "path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/nasa-viking-mission/", "keywords": "", "id": "70aWb6xBrbg", "title": "Viking mission", "description": "Overview of the Viking mission", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/70aWb6xBrbg.mp4/70aWb6xBrbg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/70aWb6xBrbg.mp4/70aWb6xBrbg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/70aWb6xBrbg.m3u8/70aWb6xBrbg.m3u8"}, "slug": "nasa-viking-mission", "video_id": "70aWb6xBrbg", "youtube_id": "70aWb6xBrbg", "readable_id": "nasa-viking-mission"}, "xf1okjCwdOg": {"duration": 427, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/cerebellum/", "keywords": "MCAT", "id": "xf1okjCwdOg", "title": "Cerebellum", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xf1okjCwdOg.mp4/xf1okjCwdOg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xf1okjCwdOg.mp4/xf1okjCwdOg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xf1okjCwdOg.m3u8/xf1okjCwdOg.m3u8"}, "slug": "cerebellum", "video_id": "xf1okjCwdOg", "youtube_id": "xf1okjCwdOg", "readable_id": "cerebellum"}, "lBDT2w5Wl84": {"duration": 484, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/real-nominal-gdp-tutorial/real-gdp-and-nominal-gdp/", "keywords": "macroeconomics", "id": "lBDT2w5Wl84", "title": "Real GDP and nominal GDP", "description": "Using real GDP as a measure of actual productivity growth", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lBDT2w5Wl84.mp4/lBDT2w5Wl84.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lBDT2w5Wl84.mp4/lBDT2w5Wl84.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lBDT2w5Wl84.m3u8/lBDT2w5Wl84.m3u8"}, "slug": "real-gdp-and-nominal-gdp", "video_id": "lBDT2w5Wl84", "youtube_id": "lBDT2w5Wl84", "readable_id": "real-gdp-and-nominal-gdp"}, "rRjGX8ms01o": {"duration": 874, "path": "khan/partner-content/big-history-project/life/what-is-life/bhp-evolution-epic-crashcourse/", "keywords": "", "id": "rRjGX8ms01o", "title": "Crash Course Big History: The Evolutionary Epic", "description": "Poof and you\u2019re gone! Extinction events are no joke. The Greens and Emily Graslie talk about why they are such a big deal, and what they have to do with evolution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rRjGX8ms01o.mp4/rRjGX8ms01o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rRjGX8ms01o.mp4/rRjGX8ms01o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rRjGX8ms01o.m3u8/rRjGX8ms01o.m3u8"}, "slug": "bhp-evolution-epic-crashcourse", "video_id": "rRjGX8ms01o", "youtube_id": "rRjGX8ms01o", "readable_id": "bhp-evolution-epic-crashcourse"}, "ZKvatbn4a_I": {"duration": 466, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/asthma-pathophysiology/", "keywords": "", "id": "ZKvatbn4a_I", "title": "Asthma pathophysiology", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZKvatbn4a_I.mp4/ZKvatbn4a_I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZKvatbn4a_I.mp4/ZKvatbn4a_I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZKvatbn4a_I.m3u8/ZKvatbn4a_I.m3u8"}, "slug": "asthma-pathophysiology", "video_id": "ZKvatbn4a_I", "youtube_id": "ZKvatbn4a_I", "readable_id": "asthma-pathophysiology"}, "rLIEeUP_e-Y": {"duration": 385, "path": "khan/science/health-and-medicine/hematologic-system/bleeding-and-impaired-hemostasis/introduction-to-hemostasis/", "keywords": "", "id": "rLIEeUP_e-Y", "title": "Hemostasis", "description": "Hemostasis is the process which stops bleeding after an injury. Blood vessels are repaired by the creation of a platelet plug during primary hemostasis, and the platelet plug is further reinforced by the conversion of fibrin to fibrinogen during secondary hemostasis.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rLIEeUP_e-Y.mp4/rLIEeUP_e-Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rLIEeUP_e-Y.mp4/rLIEeUP_e-Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rLIEeUP_e-Y.m3u8/rLIEeUP_e-Y.m3u8"}, "slug": "introduction-to-hemostasis", "video_id": "rLIEeUP_e-Y", "youtube_id": "rLIEeUP_e-Y", "readable_id": "introduction-to-hemostasis"}, "NuLlNAdrom4": {"duration": 546, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/taxation-and-dead-weight-loss/", "keywords": "microeconomics, supply, demand", "id": "NuLlNAdrom4", "title": "Taxation and dead weight loss", "description": "The effect of taxation on the equilibrium price and quantity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NuLlNAdrom4.mp4/NuLlNAdrom4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NuLlNAdrom4.mp4/NuLlNAdrom4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NuLlNAdrom4.m3u8/NuLlNAdrom4.m3u8"}, "slug": "taxation-and-dead-weight-loss", "video_id": "NuLlNAdrom4", "youtube_id": "NuLlNAdrom4", "readable_id": "taxation-and-dead-weight-loss"}, "KPeS2gdizhQ": {"duration": 137, "path": "khan/math/algebra2/manipulating-functions/introduction-to-inverses-of-functions/understanding-function-inverses-example/", "keywords": "", "id": "KPeS2gdizhQ", "title": "How to graph the inverse of a linear function given the graph of the function (example)", "description": "Sal is given a line segment on the coordinate plane, and he graphs the inverse of the function represented by that segment.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KPeS2gdizhQ.mp4/KPeS2gdizhQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KPeS2gdizhQ.mp4/KPeS2gdizhQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KPeS2gdizhQ.m3u8/KPeS2gdizhQ.m3u8"}, "slug": "understanding-function-inverses-example", "video_id": "KPeS2gdizhQ", "youtube_id": "KPeS2gdizhQ", "readable_id": "understanding-function-inverses-example"}, "kpG7xySkivg": {"duration": 625, "path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-determinant-after-row-operations/", "keywords": "linear, algebra, determinant", "id": "kpG7xySkivg", "title": "Determinant after row operations", "description": "What happens to the determinant when we perform a row operation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kpG7xySkivg.mp4/kpG7xySkivg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kpG7xySkivg.mp4/kpG7xySkivg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kpG7xySkivg.m3u8/kpG7xySkivg.m3u8"}, "slug": "linear-algebra-determinant-after-row-operations", "video_id": "kpG7xySkivg", "youtube_id": "kpG7xySkivg", "readable_id": "linear-algebra-determinant-after-row-operations"}, "1015d63VKh4": {"duration": 292, "path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-with-triple-composition/", "keywords": "", "id": "1015d63VKh4", "title": "Chain rule with triple composition", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1015d63VKh4.mp4/1015d63VKh4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1015d63VKh4.mp4/1015d63VKh4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1015d63VKh4.m3u8/1015d63VKh4.m3u8"}, "slug": "chain-rule-with-triple-composition", "video_id": "1015d63VKh4", "youtube_id": "1015d63VKh4", "readable_id": "chain-rule-with-triple-composition"}, "dqmaxkxInZ4": {"duration": 446, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/nerve-regulation-of-the-heart/getting-a-new-heart/", "keywords": "", "id": "dqmaxkxInZ4", "title": "Getting a new heart", "description": "Think through the result of getting a new heart, and how the heart can still maintain homeostasis when the nerves are no longer around. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dqmaxkxInZ4.mp4/dqmaxkxInZ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dqmaxkxInZ4.mp4/dqmaxkxInZ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dqmaxkxInZ4.m3u8/dqmaxkxInZ4.m3u8"}, "slug": "getting-a-new-heart", "video_id": "dqmaxkxInZ4", "youtube_id": "dqmaxkxInZ4", "readable_id": "getting-a-new-heart"}, "Vx5uoZAkxng": {"duration": 124, "path": "khan/math/pre-algebra/rates-and-ratios/ratios_and_proportions/ratio-word-problem-exercise-example-1/", "keywords": "", "id": "Vx5uoZAkxng", "title": "Ratio word problem: boys to girls", "description": "In this example, we are given a ratio and then asked to apply that ratio to solve a problem. No problem!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Vx5uoZAkxng.mp4/Vx5uoZAkxng.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Vx5uoZAkxng.mp4/Vx5uoZAkxng.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Vx5uoZAkxng.m3u8/Vx5uoZAkxng.m3u8"}, "slug": "ratio-word-problem-exercise-example-1", "video_id": "Vx5uoZAkxng", "youtube_id": "Vx5uoZAkxng", "readable_id": "ratio-word-problem-exercise-example-1"}, "rmQeaJ7lu1g": {"duration": 247, "path": "khan/partner-content/exploratorium/light-and-color/soap-film-interference-model/do-the-experiment-part-2-soap-film-interference-model-science-snacks-exploratorium/", "keywords": "bubbles,soap,interference,physics,light,color,wavelength,blue,red,nanometers,science,NGSS,lesson,demonstration", "id": "rmQeaJ7lu1g", "title": "Do the experiment: Part 2", "description": "We've seen what happens with a soap film that is one wavelength of blue light thick, so what if we try even thinner soap films?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rmQeaJ7lu1g.mp4/rmQeaJ7lu1g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rmQeaJ7lu1g.mp4/rmQeaJ7lu1g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rmQeaJ7lu1g.m3u8/rmQeaJ7lu1g.m3u8"}, "slug": "do-the-experiment-part-2-soap-film-interference-model-science-snacks-exploratorium", "video_id": "rmQeaJ7lu1g", "youtube_id": "rmQeaJ7lu1g", "readable_id": "do-the-experiment-part-2-soap-film-interference-model-science-snacks-exploratorium"}, "FwA_UZkI-JM": {"duration": 189, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-complex-numbers-part-3/", "keywords": "2010, IIT, JEE, Paper, Problem, 39, Complex, Numbers, (part, 3)", "id": "FwA_UZkI-JM", "title": "IIT JEE complex numbers (part 3)", "description": "2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 3)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FwA_UZkI-JM.mp4/FwA_UZkI-JM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FwA_UZkI-JM.mp4/FwA_UZkI-JM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FwA_UZkI-JM.m3u8/FwA_UZkI-JM.m3u8"}, "slug": "iit-jee-complex-numbers-part-3", "video_id": "FwA_UZkI-JM", "youtube_id": "FwA_UZkI-JM", "readable_id": "iit-jee-complex-numbers-part-3"}, "katx69CGBwo": {"duration": 319, "path": "khan/humanities/renaissance-reformation/northern/england/the-harrowing-of-hell-c-1440-70/", "keywords": "art history,", "id": "katx69CGBwo", "title": "The Harrowing of Hell", "description": "The Harrowing of Hell, c. 1440-70, carved painted and gilt alabaster, 58.3 x 31.5 cm (Victoria and Albert Museum) Speakers: Dr. Nancy Ross and Dr. Paul Binski", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/katx69CGBwo.mp4/katx69CGBwo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/katx69CGBwo.mp4/katx69CGBwo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/katx69CGBwo.m3u8/katx69CGBwo.m3u8"}, "slug": "the-harrowing-of-hell-c-1440-70", "video_id": "katx69CGBwo", "youtube_id": "katx69CGBwo", "readable_id": "the-harrowing-of-hell-c-1440-70"}, "a1lVOO9Y080": {"duration": 657, "path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/credit-default-swaps/", "keywords": "credit, default, swap, aig", "id": "a1lVOO9Y080", "title": "Credit default swaps", "description": "Introduction to credit default swaps", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a1lVOO9Y080.mp4/a1lVOO9Y080.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a1lVOO9Y080.mp4/a1lVOO9Y080.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a1lVOO9Y080.m3u8/a1lVOO9Y080.m3u8"}, "slug": "credit-default-swaps", "video_id": "a1lVOO9Y080", "youtube_id": "a1lVOO9Y080", "readable_id": "credit-default-swaps"}, "7CXN56zbqBM": {"duration": 232, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s4-easier/", "keywords": "", "id": "7CXN56zbqBM", "title": "Angles, arc lengths, and trig functions \u2014 Basic example", "description": "Watch Sal work through a basic Angles, arc lengths, and trig functions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7CXN56zbqBM.mp4/7CXN56zbqBM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7CXN56zbqBM.mp4/7CXN56zbqBM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7CXN56zbqBM.m3u8/7CXN56zbqBM.m3u8"}, "slug": "sat-math-s4-easier", "video_id": "7CXN56zbqBM", "youtube_id": "7CXN56zbqBM", "readable_id": "sat-math-s4-easier"}, "2axaRJQkfVk": {"duration": 447, "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-2-c-d/", "keywords": "advanced, placement, exam", "id": "2axaRJQkfVk", "title": "2011 Calculus AB free response #2 (c & d)", "description": "Second fundamental theorem of calculus application", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2axaRJQkfVk.mp4/2axaRJQkfVk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2axaRJQkfVk.mp4/2axaRJQkfVk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2axaRJQkfVk.m3u8/2axaRJQkfVk.m3u8"}, "slug": "2011-calculus-ab-free-response-2-c-d", "video_id": "2axaRJQkfVk", "youtube_id": "2axaRJQkfVk", "readable_id": "2011-calculus-ab-free-response-2-c-d"}, "Weymq89kwAw": {"duration": 102, "path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-magician-s-guess/", "keywords": "", "id": "Weymq89kwAw", "title": "DLab: Magician's guess simulation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Weymq89kwAw.mp4/Weymq89kwAw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Weymq89kwAw.mp4/Weymq89kwAw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Weymq89kwAw.m3u8/Weymq89kwAw.m3u8"}, "slug": "discovery-lab-magician-s-guess", "video_id": "Weymq89kwAw", "youtube_id": "Weymq89kwAw", "readable_id": "discovery-lab-magician-s-guess"}, "-W3RkgvLrGI": {"duration": 537, "path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/projectile-motion-part-4/", "keywords": "physics, accleration, time, velocity, khan", "id": "-W3RkgvLrGI", "title": "Projectile motion (part 4)", "description": "Solving for time when you are given the change in distance, acceleration, and initial velocity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-W3RkgvLrGI.mp4/-W3RkgvLrGI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-W3RkgvLrGI.mp4/-W3RkgvLrGI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-W3RkgvLrGI.m3u8/-W3RkgvLrGI.m3u8"}, "slug": "projectile-motion-part-4", "video_id": "-W3RkgvLrGI", "youtube_id": "-W3RkgvLrGI", "readable_id": "projectile-motion-part-4"}, "oaJ01Ex7DLw": {"duration": 431, "path": "khan/test-prep/mcat/processing-the-environment/cognition/theories-of-intelligence/", "keywords": "", "id": "oaJ01Ex7DLw", "title": "Theories of intelligence", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oaJ01Ex7DLw.mp4/oaJ01Ex7DLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oaJ01Ex7DLw.mp4/oaJ01Ex7DLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oaJ01Ex7DLw.m3u8/oaJ01Ex7DLw.m3u8"}, "slug": "theories-of-intelligence", "video_id": "oaJ01Ex7DLw", "youtube_id": "oaJ01Ex7DLw", "readable_id": "theories-of-intelligence"}, "bIFdW0NZ9W4": {"duration": 204, "path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/negative-fractional-exponent-examples-2/", "keywords": "", "id": "bIFdW0NZ9W4", "title": "How to evaluate a rational-exponent expression with a rational number at the base (example)", "description": "Sal shows how to evaluate (25/9)^(1/2) and (81/256)^(-1/4).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bIFdW0NZ9W4.mp4/bIFdW0NZ9W4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bIFdW0NZ9W4.mp4/bIFdW0NZ9W4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bIFdW0NZ9W4.m3u8/bIFdW0NZ9W4.m3u8"}, "slug": "negative-fractional-exponent-examples-2", "video_id": "bIFdW0NZ9W4", "youtube_id": "bIFdW0NZ9W4", "readable_id": "negative-fractional-exponent-examples-2"}, "qGmJ4F3b5W8": {"duration": 247, "path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/graphical-relations-and-functions/", "keywords": "u17_l1_t1_we3, Graphical, Relations, and, Functions", "id": "qGmJ4F3b5W8", "title": "How to check if a set of points on the graph represents a function (example)", "description": "Sal checks whether a given set of points can represent a function. For the set to represent a function, each domain element must have one corresponding range element at most.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qGmJ4F3b5W8.mp4/qGmJ4F3b5W8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qGmJ4F3b5W8.mp4/qGmJ4F3b5W8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qGmJ4F3b5W8.m3u8/qGmJ4F3b5W8.m3u8"}, "slug": "graphical-relations-and-functions", "video_id": "qGmJ4F3b5W8", "youtube_id": "qGmJ4F3b5W8", "readable_id": "graphical-relations-and-functions"}, "6V9x0d5wRpI": {"duration": 104, "path": "khan/humanities/monarchy-enlightenment/rococo/lisabeth-louise-vigee-le-brun-madame-perregaux-1789/", "keywords": "smarthistory, Elisabeth-Louise Vigee Le Brun, Le Brun, Vigee Le Brun, Madame Perregaux, French painting, 18th century art, art history, Wallace Collection, London", "id": "6V9x0d5wRpI", "title": "Vig\u00e9e Le Brun, Madame Perregaux", "description": "\u00c9lisabeth-Louise Vig\u00e9e Le Brun, Madame Perregaux, 1789, oil on oak panel,\n99.6 x 78.5 cm (Wallace Collection, London)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6V9x0d5wRpI.mp4/6V9x0d5wRpI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6V9x0d5wRpI.mp4/6V9x0d5wRpI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6V9x0d5wRpI.m3u8/6V9x0d5wRpI.m3u8"}, "slug": "lisabeth-louise-vigee-le-brun-madame-perregaux-1789", "video_id": "6V9x0d5wRpI", "youtube_id": "6V9x0d5wRpI", "readable_id": "lisabeth-louise-vigee-le-brun-madame-perregaux-1789"}, "Yiy84xYQ3es": {"duration": 493, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/halogenation/", "keywords": "", "id": "Yiy84xYQ3es", "title": "Halogenation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Yiy84xYQ3es.mp4/Yiy84xYQ3es.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Yiy84xYQ3es.mp4/Yiy84xYQ3es.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Yiy84xYQ3es.m3u8/Yiy84xYQ3es.m3u8"}, "slug": "halogenation", "video_id": "Yiy84xYQ3es", "youtube_id": "Yiy84xYQ3es", "readable_id": "halogenation"}, "4dcGgUrkttY": {"duration": 568, "path": "khan/test-prep/mcat/behavior/behavior-and-genetics/temperment-heredity-genes/", "keywords": "", "id": "4dcGgUrkttY", "title": "Temperament, heredity, and genes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4dcGgUrkttY.mp4/4dcGgUrkttY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4dcGgUrkttY.mp4/4dcGgUrkttY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4dcGgUrkttY.m3u8/4dcGgUrkttY.m3u8"}, "slug": "temperment-heredity-genes", "video_id": "4dcGgUrkttY", "youtube_id": "4dcGgUrkttY", "readable_id": "temperment-heredity-genes"}, "CEdXvoAv_oM": {"duration": 287, "path": "khan/test-prep/mcat/physical-processes/normal-forces/slow-sock-on-lubricon-vi/", "keywords": "newton's, first, law", "id": "CEdXvoAv_oM", "title": "Slow sock on Lubricon VI", "description": "What would happen to a slowly moving frozen sock on a frictionless planet", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CEdXvoAv_oM.mp4/CEdXvoAv_oM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CEdXvoAv_oM.mp4/CEdXvoAv_oM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CEdXvoAv_oM.m3u8/CEdXvoAv_oM.m3u8"}, "slug": "slow-sock-on-lubricon-vi", "video_id": "CEdXvoAv_oM", "youtube_id": "CEdXvoAv_oM", "readable_id": "slow-sock-on-lubricon-vi"}, "vhNxNZLjuOg": {"duration": 173, "path": "khan/partner-content/pixar/modeling-character/subdivision-averages/charactermodeling7/", "keywords": "", "id": "vhNxNZLjuOg", "title": "3. Fun with weights", "description": "Let's take a closer look at the weights used during subdivision. Do we have to be careful when selecting weights?\nClick here to learn more about Pascal's Triangle & the Binomial theorem\nClick here to learn about eigenvalues & eignenvectors", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vhNxNZLjuOg.mp4/vhNxNZLjuOg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vhNxNZLjuOg.mp4/vhNxNZLjuOg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vhNxNZLjuOg.m3u8/vhNxNZLjuOg.m3u8"}, "slug": "charactermodeling7", "video_id": "vhNxNZLjuOg", "youtube_id": "vhNxNZLjuOg", "readable_id": "charactermodeling7"}, "i0VS3eEGjiQ": {"duration": 416, "path": "khan/math/geometry/triangle-properties/medians_centroids/proving-that-the-centroid-is-2-3rds-along-the-median/", "keywords": "geometry, triangle", "id": "i0VS3eEGjiQ", "title": "Proving that the centroid is 2-3rds along the median", "description": "Showing that the centroid divides each median into segments with a 2:1 ratio (or that the centroid is 2/3 along the median)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i0VS3eEGjiQ.mp4/i0VS3eEGjiQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i0VS3eEGjiQ.mp4/i0VS3eEGjiQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i0VS3eEGjiQ.m3u8/i0VS3eEGjiQ.m3u8"}, "slug": "proving-that-the-centroid-is-2-3rds-along-the-median", "video_id": "i0VS3eEGjiQ", "youtube_id": "i0VS3eEGjiQ", "readable_id": "proving-that-the-centroid-is-2-3rds-along-the-median"}, "BRVPlDCMgMg": {"duration": 434, "path": "khan/test-prep/mcat/chemical-processes/kinetics/second-order-reaction-with-calculus/", "keywords": "", "id": "BRVPlDCMgMg", "title": "Second-order reaction (with calculus)", "description": "Deriving the integrated rate law for second order reactions using calculus. How you can graph second order rate data to see a linear relationship.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BRVPlDCMgMg.mp4/BRVPlDCMgMg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BRVPlDCMgMg.mp4/BRVPlDCMgMg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BRVPlDCMgMg.m3u8/BRVPlDCMgMg.m3u8"}, "slug": "second-order-reaction-with-calculus", "video_id": "BRVPlDCMgMg", "youtube_id": "BRVPlDCMgMg", "readable_id": "second-order-reaction-with-calculus"}, "yIWKrQTznXc": {"duration": 636, "path": "khan/test-prep/mcat/processing-the-environment/emotion/autonomic-nervous-system-ans-and-physiologic-markers-of-emotion/", "keywords": "", "id": "yIWKrQTznXc", "title": "Autonomic nervous system (ANS) and physiologic markers of emotion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yIWKrQTznXc.mp4/yIWKrQTznXc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yIWKrQTznXc.mp4/yIWKrQTznXc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yIWKrQTznXc.m3u8/yIWKrQTznXc.m3u8"}, "slug": "autonomic-nervous-system-ans-and-physiologic-markers-of-emotion", "video_id": "yIWKrQTznXc", "youtube_id": "yIWKrQTznXc", "readable_id": "autonomic-nervous-system-ans-and-physiologic-markers-of-emotion"}, "8In5PK1yUAA": {"duration": 243, "path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/carry-trade-basics/", "keywords": "finance, macro, economics, japan, iceland", "id": "8In5PK1yUAA", "title": "Carry trade basics", "description": "The mechanics of the carry trade", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8In5PK1yUAA.mp4/8In5PK1yUAA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8In5PK1yUAA.mp4/8In5PK1yUAA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8In5PK1yUAA.m3u8/8In5PK1yUAA.m3u8"}, "slug": "carry-trade-basics", "video_id": "8In5PK1yUAA", "youtube_id": "8In5PK1yUAA", "readable_id": "carry-trade-basics"}, "yXg5CYuCcU4": {"duration": 147, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-5-minor-correction/", "keywords": "2003, AIME, II, Problem, Minor, Correction", "id": "yXg5CYuCcU4", "title": "2003 AIME II problem 5 minor correction", "description": "2003 AIME II Problem 5 Minor Correction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yXg5CYuCcU4.mp4/yXg5CYuCcU4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yXg5CYuCcU4.mp4/yXg5CYuCcU4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yXg5CYuCcU4.m3u8/yXg5CYuCcU4.m3u8"}, "slug": "2003-aime-ii-problem-5-minor-correction", "video_id": "yXg5CYuCcU4", "youtube_id": "yXg5CYuCcU4", "readable_id": "2003-aime-ii-problem-5-minor-correction"}, "Qcd0IhW_85I": {"duration": 652, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/bohr-model-radii-derivation-using-physics/", "keywords": "", "id": "Qcd0IhW_85I", "title": "Bohr model radii (derivation using physics)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qcd0IhW_85I.mp4/Qcd0IhW_85I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qcd0IhW_85I.mp4/Qcd0IhW_85I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qcd0IhW_85I.m3u8/Qcd0IhW_85I.m3u8"}, "slug": "bohr-model-radii-derivation-using-physics", "video_id": "Qcd0IhW_85I", "youtube_id": "Qcd0IhW_85I", "readable_id": "bohr-model-radii-derivation-using-physics"}, "OcUMAHfo9MA": {"duration": 270, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-contarelli-chapel-san-luigi-dei-francesi-rome/", "keywords": "Rome, Caravaggio, Calling of St. Matthew, Contarelli Chapel, Baroque art, Smarthistory", "id": "OcUMAHfo9MA", "title": "Caravaggio, Contarelli Chapel, San Luigi dei Francesi", "description": "Caravaggio, Calling of St. Matthew, c. 1599-1600, oil on canvas (Contarelli Chapel, San Luigi dei Francesi, Rome). A Smarthistory video by Beth Harris and Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OcUMAHfo9MA.mp4/OcUMAHfo9MA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OcUMAHfo9MA.mp4/OcUMAHfo9MA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OcUMAHfo9MA.m3u8/OcUMAHfo9MA.m3u8"}, "slug": "caravaggio-contarelli-chapel-san-luigi-dei-francesi-rome", "video_id": "OcUMAHfo9MA", "youtube_id": "OcUMAHfo9MA", "readable_id": "caravaggio-contarelli-chapel-san-luigi-dei-francesi-rome"}, "KIFdiufU8lc": {"duration": 134, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-10/", "keywords": "", "id": "KIFdiufU8lc", "title": "10 Finding angle measure", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KIFdiufU8lc.mp4/KIFdiufU8lc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KIFdiufU8lc.mp4/KIFdiufU8lc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KIFdiufU8lc.m3u8/KIFdiufU8lc.m3u8"}, "slug": "sat-2010-may-6-10", "video_id": "KIFdiufU8lc", "youtube_id": "KIFdiufU8lc", "readable_id": "sat-2010-may-6-10"}, "G37qpVUzB1g": {"duration": 207, "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/babylonian/babylonian-mind/", "keywords": "British Museum", "id": "G37qpVUzB1g", "title": "The Babylonian mind", "description": "Trace the legacy of Babylonian discoveries and ideas, including their mathematical system based on 60 and their desire to predict the future. With British Museum curator Irving Finkel. \u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/G37qpVUzB1g.mp4/G37qpVUzB1g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/G37qpVUzB1g.mp4/G37qpVUzB1g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/G37qpVUzB1g.m3u8/G37qpVUzB1g.m3u8"}, "slug": "babylonian-mind", "video_id": "G37qpVUzB1g", "youtube_id": "G37qpVUzB1g", "readable_id": "babylonian-mind"}, "XDjbNykJ28E": {"duration": 276, "path": "khan/math/pre-algebra/fractions-pre-alg/mult-fracs-word-probs-pre-alg/multiplying-fractions-word-problem-1/", "keywords": "", "id": "XDjbNykJ28E", "title": "Multiplying fractions word problem: pigging out on pumpkin pie", "description": "Oops! Someone tried to solve this problem and made a mistake. See if you can spot the error.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XDjbNykJ28E.mp4/XDjbNykJ28E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XDjbNykJ28E.mp4/XDjbNykJ28E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XDjbNykJ28E.m3u8/XDjbNykJ28E.m3u8"}, "slug": "multiplying-fractions-word-problem-1", "video_id": "XDjbNykJ28E", "youtube_id": "XDjbNykJ28E", "readable_id": "multiplying-fractions-word-problem-1"}, "21vbBiCVijE": {"duration": 478, "path": "khan/math/geometry/triangle-properties/angle_bisectors/incenter-and-incircles-of-a-triangle/", "keywords": "Incenter, and, incircles, of, a, triangle", "id": "21vbBiCVijE", "title": "Incenter and incircles of a triangle", "description": "Using angle bisectors to find the incenter and incircle of a triangle", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/21vbBiCVijE.mp4/21vbBiCVijE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/21vbBiCVijE.mp4/21vbBiCVijE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/21vbBiCVijE.m3u8/21vbBiCVijE.m3u8"}, "slug": "incenter-and-incircles-of-a-triangle", "video_id": "21vbBiCVijE", "youtube_id": "21vbBiCVijE", "readable_id": "incenter-and-incircles-of-a-triangle"}, "zMQhuo3QYIg": {"duration": 123, "path": "khan/partner-content/pixar/animate/ball/animation-1a/", "keywords": "", "id": "zMQhuo3QYIg", "title": "1. Straight ahead animation", "description": "Let's start by drawing every frame, one by one...", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zMQhuo3QYIg.mp4/zMQhuo3QYIg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zMQhuo3QYIg.mp4/zMQhuo3QYIg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zMQhuo3QYIg.m3u8/zMQhuo3QYIg.m3u8"}, "slug": "animation-1a", "video_id": "zMQhuo3QYIg", "youtube_id": "zMQhuo3QYIg", "readable_id": "animation-1a"}, "0mWq45973ok": {"duration": 115, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-3/", "keywords": "", "id": "0mWq45973ok", "title": "3 Letter symmetry", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0mWq45973ok.mp4/0mWq45973ok.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0mWq45973ok.mp4/0mWq45973ok.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0mWq45973ok.m3u8/0mWq45973ok.m3u8"}, "slug": "sat-getting-ready-2-3", "video_id": "0mWq45973ok", "youtube_id": "0mWq45973ok", "readable_id": "sat-getting-ready-2-3"}, "NR3779ef9yQ": {"duration": 310, "path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/an-introduction-to-mendelian-genetics/", "keywords": "", "id": "NR3779ef9yQ", "title": "An Introduction to Mendelian Genetics", "description": "An introduction to Mendelian Genetics and inheritance. By Ross Firestone.\nAn introduction to Mendelian Genetics and inheritance.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NR3779ef9yQ.mp4/NR3779ef9yQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NR3779ef9yQ.mp4/NR3779ef9yQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NR3779ef9yQ.m3u8/NR3779ef9yQ.m3u8"}, "slug": "an-introduction-to-mendelian-genetics", "video_id": "NR3779ef9yQ", "youtube_id": "NR3779ef9yQ", "readable_id": "an-introduction-to-mendelian-genetics"}, "BTnAlNSgNsY": {"duration": 511, "path": "khan/math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl/complementary-and-supplementary-angles/", "keywords": "geometry", "id": "BTnAlNSgNsY", "title": "Complementary and supplementary angles", "description": "Let's add some tools to our geometry tool belt. Here's a thorough explanation of complementary and supplementary angles, as well as definitions of adjacent and straight angles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BTnAlNSgNsY.mp4/BTnAlNSgNsY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BTnAlNSgNsY.mp4/BTnAlNSgNsY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BTnAlNSgNsY.m3u8/BTnAlNSgNsY.m3u8"}, "slug": "complementary-and-supplementary-angles", "video_id": "BTnAlNSgNsY", "youtube_id": "BTnAlNSgNsY", "readable_id": "complementary-and-supplementary-angles"}, "jN03g05TSWM": {"duration": 533, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic/detectable-civilizations-in-our-galaxy-2/", "keywords": "SETI, drake, civilization", "id": "jN03g05TSWM", "title": "Detectable civilizations in our galaxy 2", "description": "Why do we even care about the Drake Equation. Thinking about the fraction of a planet's life when a civilization might be detectable.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jN03g05TSWM.mp4/jN03g05TSWM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jN03g05TSWM.mp4/jN03g05TSWM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jN03g05TSWM.m3u8/jN03g05TSWM.m3u8"}, "slug": "detectable-civilizations-in-our-galaxy-2", "video_id": "jN03g05TSWM", "youtube_id": "jN03g05TSWM", "readable_id": "detectable-civilizations-in-our-galaxy-2"}, "2439OIVBgPg": {"duration": 595, "path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/introduction-to-angles-old/", "keywords": "angles, geometry, supplementary, complementary, math, CC_4_G_1, CC_4_G_2, CC_4_MD_5", "id": "2439OIVBgPg", "title": "Introduction to angles (old)", "description": "What an angle is. Angles in a circle. Complementary and supplementary angles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2439OIVBgPg.mp4/2439OIVBgPg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2439OIVBgPg.mp4/2439OIVBgPg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2439OIVBgPg.m3u8/2439OIVBgPg.m3u8"}, "slug": "introduction-to-angles-old", "video_id": "2439OIVBgPg", "youtube_id": "2439OIVBgPg", "readable_id": "introduction-to-angles-old"}, "a1Ye5RcWOqg": {"duration": 647, "path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/comparing-population-proportions-1/", "keywords": "Comparing, Population, Proportions, CC_7_SP_3, CC_7_SP_4", "id": "a1Ye5RcWOqg", "title": "Comparing population proportions 1", "description": "Comparing Population Proportions 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a1Ye5RcWOqg.mp4/a1Ye5RcWOqg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a1Ye5RcWOqg.mp4/a1Ye5RcWOqg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a1Ye5RcWOqg.m3u8/a1Ye5RcWOqg.m3u8"}, "slug": "comparing-population-proportions-1", "video_id": "a1Ye5RcWOqg", "youtube_id": "a1Ye5RcWOqg", "readable_id": "comparing-population-proportions-1"}, "JvDpYlyKkNU": {"duration": 231, "path": "khan/math/algebra2/conics_precalc/circles-tutorial-precalc/radius-and-center-for-a-circle-equation-in-standard-form/", "keywords": "", "id": "JvDpYlyKkNU", "title": "Radius and center for a circle equation in standard form", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JvDpYlyKkNU.mp4/JvDpYlyKkNU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JvDpYlyKkNU.mp4/JvDpYlyKkNU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JvDpYlyKkNU.m3u8/JvDpYlyKkNU.m3u8"}, "slug": "radius-and-center-for-a-circle-equation-in-standard-form", "video_id": "JvDpYlyKkNU", "youtube_id": "JvDpYlyKkNU", "readable_id": "radius-and-center-for-a-circle-equation-in-standard-form"}, "fyshrv6YDVY": {"duration": 87, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/logarithmic-equations/", "keywords": "u18_l2_t1_we1, Logarithmic, Equations", "id": "fyshrv6YDVY", "title": "Logarithmic equations", "description": "Logarithmic Equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fyshrv6YDVY.mp4/fyshrv6YDVY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fyshrv6YDVY.mp4/fyshrv6YDVY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fyshrv6YDVY.m3u8/fyshrv6YDVY.m3u8"}, "slug": "logarithmic-equations", "video_id": "fyshrv6YDVY", "youtube_id": "fyshrv6YDVY", "readable_id": "logarithmic-equations"}, "ZXUpfcTvSaI": {"duration": 740, "path": "khan/partner-content/brookings-institution/introduction-to-healthcare/what-goes-into-a-medical-bill/", "keywords": "", "id": "ZXUpfcTvSaI", "title": "Understanding your medical bill", "description": "Have you ever been confused by a medical bill? What happens after you visit the doctor? This video explains how medical costs are calculated and paid for by public and private insurance. \u00a0Learn more about the path of that bill, how it\u2019s processed, and who pays for what.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZXUpfcTvSaI.mp4/ZXUpfcTvSaI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZXUpfcTvSaI.mp4/ZXUpfcTvSaI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZXUpfcTvSaI.m3u8/ZXUpfcTvSaI.m3u8"}, "slug": "what-goes-into-a-medical-bill", "video_id": "ZXUpfcTvSaI", "youtube_id": "ZXUpfcTvSaI", "readable_id": "what-goes-into-a-medical-bill"}, "IuBoeDihLUc": {"duration": 641, "path": "khan/science/physics/newton-gravitation/gravity-newtonian/mass-and-weight-clarification/", "keywords": "physics, mass, weight, slug, pound, kilogram, newton", "id": "IuBoeDihLUc", "title": "Mass and weight clarification", "description": "Difference between mass and weight", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IuBoeDihLUc.mp4/IuBoeDihLUc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IuBoeDihLUc.mp4/IuBoeDihLUc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IuBoeDihLUc.m3u8/IuBoeDihLUc.m3u8"}, "slug": "mass-and-weight-clarification", "video_id": "IuBoeDihLUc", "youtube_id": "IuBoeDihLUc", "readable_id": "mass-and-weight-clarification"}, "usnv1_xRCvs": {"duration": 592, "path": "khan/test-prep/mcat/behavior/behavior-and-genetics/twin-studies-and-adoption-studies/", "keywords": "", "id": "usnv1_xRCvs", "title": "Twin studies and adoption studies", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/usnv1_xRCvs.mp4/usnv1_xRCvs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/usnv1_xRCvs.mp4/usnv1_xRCvs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/usnv1_xRCvs.m3u8/usnv1_xRCvs.m3u8"}, "slug": "twin-studies-and-adoption-studies", "video_id": "usnv1_xRCvs", "youtube_id": "usnv1_xRCvs", "readable_id": "twin-studies-and-adoption-studies"}, "x7wZCtFWblE": {"duration": 258, "path": "khan/test-prep/mcat/behavior/theories-personality/behavioral-theory/", "keywords": "behavioral theory", "id": "x7wZCtFWblE", "title": "Behavioral theory", "description": "Explore the contributions two major behavioral theorists have made to the Behavioral Theory of Personality. By Shreena Desai.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x7wZCtFWblE.mp4/x7wZCtFWblE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x7wZCtFWblE.mp4/x7wZCtFWblE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x7wZCtFWblE.m3u8/x7wZCtFWblE.m3u8"}, "slug": "behavioral-theory", "video_id": "x7wZCtFWblE", "youtube_id": "x7wZCtFWblE", "readable_id": "behavioral-theory"}, "PySVsEUnrng": {"duration": 558, "path": "khan/test-prep/mcat/biomolecules/dna/dna-repair-2/", "keywords": "", "id": "PySVsEUnrng", "title": "DNA repair 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PySVsEUnrng.mp4/PySVsEUnrng.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PySVsEUnrng.mp4/PySVsEUnrng.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PySVsEUnrng.m3u8/PySVsEUnrng.m3u8"}, "slug": "dna-repair-2", "video_id": "PySVsEUnrng", "youtube_id": "PySVsEUnrng", "readable_id": "dna-repair-2"}, "th06SCNNZ60": {"duration": 1009, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/ira-401ks/roth-iras/", "keywords": "Roth, IRA", "id": "th06SCNNZ60", "title": "Roth IRAs", "description": "Introduction to Roth IRA's", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/th06SCNNZ60.mp4/th06SCNNZ60.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/th06SCNNZ60.mp4/th06SCNNZ60.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/th06SCNNZ60.m3u8/th06SCNNZ60.m3u8"}, "slug": "roth-iras", "video_id": "th06SCNNZ60", "youtube_id": "th06SCNNZ60", "readable_id": "roth-iras"}, "qZ1ofSJBxBU": {"duration": 850, "path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/august-sander-portraits/", "keywords": "Photography, Smarthistory, Art History, August Sander", "id": "qZ1ofSJBxBU", "title": "Sander, Portraits", "description": "Portraits by August Sander discussed:\nPastry Cook, gelatin silver print, 1928\nSecretary at a Radio Station, Cologne, gelatin silver print, c. 1931\nDisabled Man, gelatin silver print, 1926\n\nSpeakers: Dr. Juliana Kreinik, Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qZ1ofSJBxBU.mp4/qZ1ofSJBxBU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qZ1ofSJBxBU.mp4/qZ1ofSJBxBU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qZ1ofSJBxBU.m3u8/qZ1ofSJBxBU.m3u8"}, "slug": "august-sander-portraits", "video_id": "qZ1ofSJBxBU", "youtube_id": "qZ1ofSJBxBU", "readable_id": "august-sander-portraits"}, "8VgmBe3ulb8": {"duration": 745, "path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/recognizing-odd-and-even-functions/", "keywords": "even, odd, functions, CC_39336_F-BF_3", "id": "8VgmBe3ulb8", "title": "Recognizing odd and even functions", "description": "Even and odd functions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8VgmBe3ulb8.mp4/8VgmBe3ulb8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8VgmBe3ulb8.mp4/8VgmBe3ulb8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8VgmBe3ulb8.m3u8/8VgmBe3ulb8.m3u8"}, "slug": "recognizing-odd-and-even-functions", "video_id": "8VgmBe3ulb8", "youtube_id": "8VgmBe3ulb8", "readable_id": "recognizing-odd-and-even-functions"}, "oC_-oUOEaVM": {"duration": 616, "path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/evidence-that-dna-is-genetic-material-2/", "keywords": "", "id": "oC_-oUOEaVM", "title": "Evidence that DNA is genetic material 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oC_-oUOEaVM.mp4/oC_-oUOEaVM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oC_-oUOEaVM.mp4/oC_-oUOEaVM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oC_-oUOEaVM.m3u8/oC_-oUOEaVM.m3u8"}, "slug": "evidence-that-dna-is-genetic-material-2", "video_id": "oC_-oUOEaVM", "youtube_id": "oC_-oUOEaVM", "readable_id": "evidence-that-dna-is-genetic-material-2"}, "QRPRmRAOCog": {"duration": 421, "path": "khan/test-prep/mcat/biomolecules/gene-control/oncogenes/", "keywords": "", "id": "QRPRmRAOCog", "title": "Oncogenes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QRPRmRAOCog.mp4/QRPRmRAOCog.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QRPRmRAOCog.mp4/QRPRmRAOCog.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QRPRmRAOCog.m3u8/QRPRmRAOCog.m3u8"}, "slug": "oncogenes", "video_id": "QRPRmRAOCog", "youtube_id": "QRPRmRAOCog", "readable_id": "oncogenes"}, "RywHs4kKxjA": {"duration": 547, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/what-is-sinusitis/", "keywords": "", "id": "RywHs4kKxjA", "title": "What is sinusitis?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RywHs4kKxjA.mp4/RywHs4kKxjA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RywHs4kKxjA.mp4/RywHs4kKxjA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RywHs4kKxjA.m3u8/RywHs4kKxjA.m3u8"}, "slug": "what-is-sinusitis", "video_id": "RywHs4kKxjA", "youtube_id": "RywHs4kKxjA", "readable_id": "what-is-sinusitis"}, "E_Hwhp74Rhc": {"duration": 665, "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-example-part-1-parameterizing-the-unit-sphere/", "keywords": "vector, calculus, surface, integral", "id": "E_Hwhp74Rhc", "title": "Surface integral example part 1: Parameterizing the unit sphere", "description": "Visualizing a suitable parameterization", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E_Hwhp74Rhc.mp4/E_Hwhp74Rhc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E_Hwhp74Rhc.mp4/E_Hwhp74Rhc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E_Hwhp74Rhc.m3u8/E_Hwhp74Rhc.m3u8"}, "slug": "surface-integral-example-part-1-parameterizing-the-unit-sphere", "video_id": "E_Hwhp74Rhc", "youtube_id": "E_Hwhp74Rhc", "readable_id": "surface-integral-example-part-1-parameterizing-the-unit-sphere"}, "3yBYXNW1Nls": {"duration": 582, "path": "khan/math/trigonometry/unit-circle-trig-func/trig-functions-special-angles/trig-functions-special-angles/", "keywords": "", "id": "3yBYXNW1Nls", "title": "Finding trig functions of special angles example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3yBYXNW1Nls.mp4/3yBYXNW1Nls.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3yBYXNW1Nls.mp4/3yBYXNW1Nls.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3yBYXNW1Nls.m3u8/3yBYXNW1Nls.m3u8"}, "slug": "trig-functions-special-angles", "video_id": "3yBYXNW1Nls", "youtube_id": "3yBYXNW1Nls", "readable_id": "trig-functions-special-angles"}, "DLD23lPv8eo": {"duration": 813, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/what-is-preload/", "keywords": "", "id": "DLD23lPv8eo", "title": "What is preload?", "description": "Some say Preload = End-Diastolic Pressure, others say Preload = End-Diastolic Volume, so which one is it? Watch and find out! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DLD23lPv8eo.mp4/DLD23lPv8eo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DLD23lPv8eo.mp4/DLD23lPv8eo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DLD23lPv8eo.m3u8/DLD23lPv8eo.m3u8"}, "slug": "what-is-preload", "video_id": "DLD23lPv8eo", "youtube_id": "DLD23lPv8eo", "readable_id": "what-is-preload"}, "GwjiR2_7A7Y": {"duration": 156, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/absolute-value-equations/absolute-value-equations-1/", "keywords": "U02_L2_T2_we1, Absolute, Value, Equations, CC_6_NS_7_c, CC_8_EE_7, CC_8_EE_7_a", "id": "GwjiR2_7A7Y", "title": "Absolute value equations 1", "description": "Absolute Value Equations 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GwjiR2_7A7Y.mp4/GwjiR2_7A7Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GwjiR2_7A7Y.mp4/GwjiR2_7A7Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GwjiR2_7A7Y.m3u8/GwjiR2_7A7Y.m3u8"}, "slug": "absolute-value-equations-1", "video_id": "GwjiR2_7A7Y", "youtube_id": "GwjiR2_7A7Y", "readable_id": "absolute-value-equations-1"}, "4HkbFUoX0iI": {"duration": 151, "path": "khan/science/discoveries-projects/robots/bit-zee/making-a-power-connector-for-the-arduino/", "keywords": "Arduino power connector, hack, make, diy", "id": "4HkbFUoX0iI", "title": "Power connector for the Arduino", "description": "In this video we show you how to create a power connector for your arduino.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4HkbFUoX0iI.mp4/4HkbFUoX0iI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4HkbFUoX0iI.mp4/4HkbFUoX0iI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4HkbFUoX0iI.m3u8/4HkbFUoX0iI.m3u8"}, "slug": "making-a-power-connector-for-the-arduino", "video_id": "4HkbFUoX0iI", "youtube_id": "4HkbFUoX0iI", "readable_id": "making-a-power-connector-for-the-arduino"}, "_HFTRQRpzFM": {"duration": 226, "path": "khan/math/algebra2/polynomial-and-rational/fundamental-theorem-of-algebra/possible-real-roots/", "keywords": "", "id": "_HFTRQRpzFM", "title": "Possible number of real roots", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_HFTRQRpzFM.mp4/_HFTRQRpzFM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_HFTRQRpzFM.mp4/_HFTRQRpzFM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_HFTRQRpzFM.m3u8/_HFTRQRpzFM.m3u8"}, "slug": "possible-real-roots", "video_id": "_HFTRQRpzFM", "youtube_id": "_HFTRQRpzFM", "readable_id": "possible-real-roots"}, "1ul8g55dYA4": {"duration": 543, "path": "khan/math/geometry/right_triangles_topic/pythagorean_proofs/bhaskara-s-proof-of-pythagorean-theorem-avi/", "keywords": "", "id": "1ul8g55dYA4", "title": "Bhaskara's proof of the Pythagorean theorem", "description": "An elegant visual proof of the Pythagorean Theorem developed by the 12th century Indian mathematician Bhaskara.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1ul8g55dYA4.mp4/1ul8g55dYA4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1ul8g55dYA4.mp4/1ul8g55dYA4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1ul8g55dYA4.m3u8/1ul8g55dYA4.m3u8"}, "slug": "bhaskara-s-proof-of-pythagorean-theorem-avi", "video_id": "1ul8g55dYA4", "youtube_id": "1ul8g55dYA4", "readable_id": "bhaskara-s-proof-of-pythagorean-theorem-avi"}, "tEHF3JB2ZqE": {"duration": 636, "path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/crash-course-world-history-32/", "keywords": "crash course", "id": "tEHF3JB2ZqE", "title": "Coal, steam, and the Industrial Revolution", "description": "In which John Green wraps up revolutions month with what is arguably the most revolutionary of modern revolutions, the Industrial Revolution. While very few leaders were beheaded in the course of this one, it changed the lives of more people more dramatically than any of the political revolutions we've discussed. So, why did the Industrial Revolution happen around 1750 in the United Kingdom? Coal. Easily accessible coal, it turns out. All this, plus you'll finally learn the difference between James Watt and Thomas Newcomen, and will never again be caught telling people that your blender has a 900 Newcomen motor.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tEHF3JB2ZqE.mp4/tEHF3JB2ZqE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tEHF3JB2ZqE.mp4/tEHF3JB2ZqE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tEHF3JB2ZqE.m3u8/tEHF3JB2ZqE.m3u8"}, "slug": "crash-course-world-history-32", "video_id": "tEHF3JB2ZqE", "youtube_id": "tEHF3JB2ZqE", "readable_id": "crash-course-world-history-32"}, "bmjg7lq4m4o": {"duration": 410, "path": "khan/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula/empirical-molecular-and-structural-formulas/", "keywords": "", "id": "bmjg7lq4m4o", "title": "Empirical, molecular, and structural formulas", "description": "Examples to demonstrate the difference between empirical, structural, and molecular formulas.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bmjg7lq4m4o.mp4/bmjg7lq4m4o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bmjg7lq4m4o.mp4/bmjg7lq4m4o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bmjg7lq4m4o.m3u8/bmjg7lq4m4o.m3u8"}, "slug": "empirical-molecular-and-structural-formulas", "video_id": "bmjg7lq4m4o", "youtube_id": "bmjg7lq4m4o", "readable_id": "empirical-molecular-and-structural-formulas"}, "eTDaJ4ebK28": {"duration": 818, "path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-trig-functions-arccos/", "keywords": "trigonometry, arccos, inverse, CC_39336_F-BF_4", "id": "eTDaJ4ebK28", "title": "Inverse trig functions: arccos", "description": "Understanding the inverse cosine or arccos function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eTDaJ4ebK28.mp4/eTDaJ4ebK28.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eTDaJ4ebK28.mp4/eTDaJ4ebK28.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eTDaJ4ebK28.m3u8/eTDaJ4ebK28.m3u8"}, "slug": "inverse-trig-functions-arccos", "video_id": "eTDaJ4ebK28", "youtube_id": "eTDaJ4ebK28", "readable_id": "inverse-trig-functions-arccos"}, "F8RCR_1jIAk": {"duration": 761, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic/alkane-and-cycloalkane-nomenclature-i/", "keywords": "", "id": "F8RCR_1jIAk", "title": "Alkane and cycloalkane nomenclature I", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F8RCR_1jIAk.mp4/F8RCR_1jIAk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F8RCR_1jIAk.mp4/F8RCR_1jIAk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F8RCR_1jIAk.m3u8/F8RCR_1jIAk.m3u8"}, "slug": "alkane-and-cycloalkane-nomenclature-i", "video_id": "F8RCR_1jIAk", "youtube_id": "F8RCR_1jIAk", "readable_id": "alkane-and-cycloalkane-nomenclature-i"}, "9bE-n0n2BBA": {"duration": 276, "path": "khan/humanities/art-asia/imperial-china/tang-dynasty/chinese-buddhist-cave-shrines/", "keywords": "", "id": "9bE-n0n2BBA", "title": "Chinese Buddhist cave shrines", "description": "This video explores ancient Buddhist cave shrines in China, including why the sites were created and the major sponsors and patrons. Learn more about Chinese Buddhist cave shrines on the Asian Art Museum's education website.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9bE-n0n2BBA.mp4/9bE-n0n2BBA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9bE-n0n2BBA.mp4/9bE-n0n2BBA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9bE-n0n2BBA.m3u8/9bE-n0n2BBA.m3u8"}, "slug": "chinese-buddhist-cave-shrines", "video_id": "9bE-n0n2BBA", "youtube_id": "9bE-n0n2BBA", "readable_id": "chinese-buddhist-cave-shrines"}, "NRsM8kXtT5s": {"duration": 522, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/ring-opening-reactions-epoxides/ring-opening-reactions-of-epoxides-acid-catalyzed/", "keywords": "", "id": "NRsM8kXtT5s", "title": "Ring opening reactions of epoxides: Acid-catalyzed", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NRsM8kXtT5s.mp4/NRsM8kXtT5s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NRsM8kXtT5s.mp4/NRsM8kXtT5s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NRsM8kXtT5s.m3u8/NRsM8kXtT5s.m3u8"}, "slug": "ring-opening-reactions-of-epoxides-acid-catalyzed", "video_id": "NRsM8kXtT5s", "youtube_id": "NRsM8kXtT5s", "readable_id": "ring-opening-reactions-of-epoxides-acid-catalyzed"}, "xMz9WFvox9g": {"duration": 471, "path": "khan/math/pre-algebra/measurement/volume-introduction-rectangular/how-we-measure-volume/", "keywords": "", "id": "xMz9WFvox9g", "title": "Volume: how to measure it", "description": "Volume is a measurement in the 3rd dimension. This means that it not only has width and height, but it has depth as well. Let's watch this video in which we get a great explanation of how we measure volume.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xMz9WFvox9g.mp4/xMz9WFvox9g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xMz9WFvox9g.mp4/xMz9WFvox9g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xMz9WFvox9g.m3u8/xMz9WFvox9g.m3u8"}, "slug": "how-we-measure-volume", "video_id": "xMz9WFvox9g", "youtube_id": "xMz9WFvox9g", "readable_id": "how-we-measure-volume"}, "VO40SpSBjbc": {"duration": 1140, "path": "khan/humanities/history/euro-hist/cold-war/cuban-missile-crisis/", "keywords": "JFK, krushchev, cold, war, jupiter, fidel, castro", "id": "VO40SpSBjbc", "title": "Cuban Missile Crisis", "description": "Overview of the Cuban Missile Crisis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VO40SpSBjbc.mp4/VO40SpSBjbc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VO40SpSBjbc.mp4/VO40SpSBjbc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VO40SpSBjbc.m3u8/VO40SpSBjbc.m3u8"}, "slug": "cuban-missile-crisis", "video_id": "VO40SpSBjbc", "youtube_id": "VO40SpSBjbc", "readable_id": "cuban-missile-crisis"}, "0h5Jd7sgQWY": {"duration": 1397, "path": "khan/science/biology/her/tree-of-life/viruses/", "keywords": "biology, virus, viruses", "id": "0h5Jd7sgQWY", "title": "Viruses", "description": "Introduction to viruses", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0h5Jd7sgQWY.mp4/0h5Jd7sgQWY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0h5Jd7sgQWY.mp4/0h5Jd7sgQWY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0h5Jd7sgQWY.m3u8/0h5Jd7sgQWY.m3u8"}, "slug": "viruses", "video_id": "0h5Jd7sgQWY", "youtube_id": "0h5Jd7sgQWY", "readable_id": "viruses"}, "hoRISaqp1Po": {"duration": 226, "path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/tangent-slope-as-limiting-value-of-secant-slope-example-3/", "keywords": "", "id": "hoRISaqp1Po", "title": "Tangent slope as limiting value of secant slope example 3", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hoRISaqp1Po.mp4/hoRISaqp1Po.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hoRISaqp1Po.mp4/hoRISaqp1Po.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hoRISaqp1Po.m3u8/hoRISaqp1Po.m3u8"}, "slug": "tangent-slope-as-limiting-value-of-secant-slope-example-3", "video_id": "hoRISaqp1Po", "youtube_id": "hoRISaqp1Po", "readable_id": "tangent-slope-as-limiting-value-of-secant-slope-example-3"}, "HpdMJaKaXXc": {"duration": 853, "path": "khan/math/pre-algebra/rates-and-ratios/ratios_and_proportions/introduction-to-ratios-new-hd-version/", "keywords": "ratio, ratios, math", "id": "HpdMJaKaXXc", "title": "Introduction to ratios", "description": "What a ratio is. Simple ratio problems.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HpdMJaKaXXc.mp4/HpdMJaKaXXc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HpdMJaKaXXc.mp4/HpdMJaKaXXc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HpdMJaKaXXc.m3u8/HpdMJaKaXXc.m3u8"}, "slug": "introduction-to-ratios-new-hd-version", "video_id": "HpdMJaKaXXc", "youtube_id": "HpdMJaKaXXc", "readable_id": "introduction-to-ratios-new-hd-version"}, "A2fB3JOH9rQ": {"duration": 215, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-8/", "keywords": "", "id": "A2fB3JOH9rQ", "title": "8 Comparing percent discounts", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A2fB3JOH9rQ.mp4/A2fB3JOH9rQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A2fB3JOH9rQ.mp4/A2fB3JOH9rQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A2fB3JOH9rQ.m3u8/A2fB3JOH9rQ.m3u8"}, "slug": "sat-getting-ready-2-8", "video_id": "A2fB3JOH9rQ", "youtube_id": "A2fB3JOH9rQ", "readable_id": "sat-getting-ready-2-8"}, "ZuUWp0-gBMU": {"duration": 393, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2010-may-4-18/", "keywords": "", "id": "ZuUWp0-gBMU", "title": "18 Greatest number meeting constraints", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZuUWp0-gBMU.mp4/ZuUWp0-gBMU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZuUWp0-gBMU.mp4/ZuUWp0-gBMU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZuUWp0-gBMU.m3u8/ZuUWp0-gBMU.m3u8"}, "slug": "sat-2010-may-4-18", "video_id": "ZuUWp0-gBMU", "youtube_id": "ZuUWp0-gBMU", "readable_id": "sat-2010-may-4-18"}, "SfgD7Sm08ns": {"duration": 332, "path": "khan/math/early-math/cc-early-math-add-sub-20/cc-early-math-word-problems-within-20/exercising-gorillas/", "keywords": "", "id": "SfgD7Sm08ns", "title": "Exercising gorillas", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SfgD7Sm08ns.mp4/SfgD7Sm08ns.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SfgD7Sm08ns.mp4/SfgD7Sm08ns.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SfgD7Sm08ns.m3u8/SfgD7Sm08ns.m3u8"}, "slug": "exercising-gorillas", "video_id": "SfgD7Sm08ns", "youtube_id": "SfgD7Sm08ns", "readable_id": "exercising-gorillas"}, "wbksgG0dQoE": {"duration": 100, "path": "khan/partner-content/pixar/sets/sets1/sets-4/", "keywords": "", "id": "wbksgG0dQoE", "title": "4. Commutativity", "description": "We need to be careful with the order of scaling and translation. But why?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wbksgG0dQoE.mp4/wbksgG0dQoE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wbksgG0dQoE.mp4/wbksgG0dQoE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wbksgG0dQoE.m3u8/wbksgG0dQoE.m3u8"}, "slug": "sets-4", "video_id": "wbksgG0dQoE", "youtube_id": "wbksgG0dQoE", "readable_id": "sets-4"}, "hFZPl_t2GLU": {"duration": 143, "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/treating-type-ii-diabetes-a-practical-approach/", "keywords": "", "id": "hFZPl_t2GLU", "title": "Treating type II diabetes - A practical approach", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hFZPl_t2GLU.mp4/hFZPl_t2GLU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hFZPl_t2GLU.mp4/hFZPl_t2GLU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hFZPl_t2GLU.m3u8/hFZPl_t2GLU.m3u8"}, "slug": "treating-type-ii-diabetes-a-practical-approach", "video_id": "hFZPl_t2GLU", "youtube_id": "hFZPl_t2GLU", "readable_id": "treating-type-ii-diabetes-a-practical-approach"}, "Wyxz0fgp6-A": {"duration": 641, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/what-is-valvular-heart-disease/", "keywords": "", "id": "Wyxz0fgp6-A", "title": "What is valvular heart disease?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Wyxz0fgp6-A.mp4/Wyxz0fgp6-A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Wyxz0fgp6-A.mp4/Wyxz0fgp6-A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Wyxz0fgp6-A.m3u8/Wyxz0fgp6-A.m3u8"}, "slug": "what-is-valvular-heart-disease", "video_id": "Wyxz0fgp6-A", "youtube_id": "Wyxz0fgp6-A", "readable_id": "what-is-valvular-heart-disease"}, "JC_TVyAMYE0": {"duration": 245, "path": "khan/test-prep/mcat/processing-the-environment/somatosensation/sensory-adaptation-and-amplification/", "keywords": "sensory adaptation, amplification", "id": "JC_TVyAMYE0", "title": "Sensory adaptation and amplification", "description": "Sensory adaptation and amplification are discussed in this video to differentiate the two.\u00a0 By Ronald Sahyouni.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JC_TVyAMYE0.mp4/JC_TVyAMYE0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JC_TVyAMYE0.mp4/JC_TVyAMYE0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JC_TVyAMYE0.m3u8/JC_TVyAMYE0.m3u8"}, "slug": "sensory-adaptation-and-amplification", "video_id": "JC_TVyAMYE0", "youtube_id": "JC_TVyAMYE0", "readable_id": "sensory-adaptation-and-amplification"}, "MN4SWiEEqKo": {"duration": 730, "path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/chinese-central-bank-buying-treasuries/", "keywords": "Chinese, Central, Bank, Buying, Treasuries, yuan, renminbi", "id": "MN4SWiEEqKo", "title": "Chinese Central Bank buying treasuries", "description": "Chinese Central Bank Buying Treasuries", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MN4SWiEEqKo.mp4/MN4SWiEEqKo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MN4SWiEEqKo.mp4/MN4SWiEEqKo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MN4SWiEEqKo.m3u8/MN4SWiEEqKo.m3u8"}, "slug": "chinese-central-bank-buying-treasuries", "video_id": "MN4SWiEEqKo", "youtube_id": "MN4SWiEEqKo", "readable_id": "chinese-central-bank-buying-treasuries"}, "3szFVS5p_7A": {"duration": 255, "path": "khan/math/pre-algebra/decimals-pre-alg/regrouping-decimals-pre-alg/regrouping-with-decimals/", "keywords": "", "id": "3szFVS5p_7A", "title": "Regrouping with decimals", "description": "We're doing more regrouping but this time using decimals. Just remember those place values!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3szFVS5p_7A.mp4/3szFVS5p_7A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3szFVS5p_7A.mp4/3szFVS5p_7A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3szFVS5p_7A.m3u8/3szFVS5p_7A.m3u8"}, "slug": "regrouping-with-decimals", "video_id": "3szFVS5p_7A", "youtube_id": "3szFVS5p_7A", "readable_id": "regrouping-with-decimals"}, "UGad0bvDw9Q": {"duration": 113, "path": "khan/partner-content/pixar/crowds/crowds-1/combinatorics1/", "keywords": "", "id": "UGad0bvDw9Q", "title": "1. Counting with tables", "description": "How do we keep track of how many robots we've made?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UGad0bvDw9Q.mp4/UGad0bvDw9Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UGad0bvDw9Q.mp4/UGad0bvDw9Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UGad0bvDw9Q.m3u8/UGad0bvDw9Q.m3u8"}, "slug": "combinatorics1", "video_id": "UGad0bvDw9Q", "youtube_id": "UGad0bvDw9Q", "readable_id": "combinatorics1"}, "Dui5V8TZYbE": {"duration": 369, "path": "khan/humanities/ancient-art-civilizations/roman/late-empire/tetrarchs/", "keywords": "", "id": "Dui5V8TZYbE", "title": "Portraits of the Four Tetrarchs", "description": "Portraits of the Four Tetrarchs, from Constantinople, c. 305, porphyry, 4' 3\" high (St. Marks, Venice). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Dui5V8TZYbE.mp4/Dui5V8TZYbE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Dui5V8TZYbE.mp4/Dui5V8TZYbE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Dui5V8TZYbE.m3u8/Dui5V8TZYbE.m3u8"}, "slug": "tetrarchs", "video_id": "Dui5V8TZYbE", "youtube_id": "Dui5V8TZYbE", "readable_id": "tetrarchs"}, "HB52UTcAv0g": {"duration": 74, "path": "khan/math/algebra/introduction-to-algebra/manipulating-expressions/adding-like-rational-terms/", "keywords": "", "id": "HB52UTcAv0g", "title": "Adding expressions", "description": "So what if we add not just numbers or variables..but expressions? Here's a simple example to get you thinking about this.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HB52UTcAv0g.mp4/HB52UTcAv0g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HB52UTcAv0g.mp4/HB52UTcAv0g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HB52UTcAv0g.m3u8/HB52UTcAv0g.m3u8"}, "slug": "adding-like-rational-terms", "video_id": "HB52UTcAv0g", "youtube_id": "HB52UTcAv0g", "readable_id": "adding-like-rational-terms"}, "d_Q3mgcIiCw": {"duration": 59, "path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/ss-location-college-search/", "keywords": "", "id": "d_Q3mgcIiCw", "title": "Student story: Prioritizing location in the college search", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d_Q3mgcIiCw.mp4/d_Q3mgcIiCw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d_Q3mgcIiCw.mp4/d_Q3mgcIiCw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d_Q3mgcIiCw.m3u8/d_Q3mgcIiCw.m3u8"}, "slug": "ss-location-college-search", "video_id": "d_Q3mgcIiCw", "youtube_id": "d_Q3mgcIiCw", "readable_id": "ss-location-college-search"}, "hZLcV_wIqus": {"duration": 885, "path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/digestion-mobilization-and-transport-of-fats-part-ii/", "keywords": "", "id": "hZLcV_wIqus", "title": "Digestion, Mobilization, and Transport of Fats - Part II", "description": "1D: How are fats digested, mobilized, and transported inside the body in the fed and fasted states?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hZLcV_wIqus.mp4/hZLcV_wIqus.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hZLcV_wIqus.mp4/hZLcV_wIqus.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hZLcV_wIqus.m3u8/hZLcV_wIqus.m3u8"}, "slug": "digestion-mobilization-and-transport-of-fats-part-ii", "video_id": "hZLcV_wIqus", "youtube_id": "hZLcV_wIqus", "readable_id": "digestion-mobilization-and-transport-of-fats-part-ii"}, "G37C5vKCwH4": {"duration": 230, "path": "khan/humanities/art-1010/minimalism-earthworks/donald-judd-untitled-1969/", "keywords": "Donald Judd, Khan Academy, Smarthistory, Minimalism", "id": "G37C5vKCwH4", "title": "Donald Judd, Untitled", "description": "Donald Judd, Untitled\u00a0, 1969, ten copper units, each 9 x 40 x 31 inches with 9 inch intervals (Guggenheim Museum, New York).Speakers: Dr. Shana Gallagher-Lindsay, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/G37C5vKCwH4.mp4/G37C5vKCwH4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/G37C5vKCwH4.mp4/G37C5vKCwH4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/G37C5vKCwH4.m3u8/G37C5vKCwH4.m3u8"}, "slug": "donald-judd-untitled-1969", "video_id": "G37C5vKCwH4", "youtube_id": "G37C5vKCwH4", "readable_id": "donald-judd-untitled-1969"}, "47_f2c-URn4": {"duration": 164, "path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/environment-modeling2/", "keywords": "", "id": "47_f2c-URn4", "title": "2. Midpoint formula", "description": "Explore how midpoints are used to describe the \"string art construction.\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/47_f2c-URn4.mp4/47_f2c-URn4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/47_f2c-URn4.mp4/47_f2c-URn4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/47_f2c-URn4.m3u8/47_f2c-URn4.m3u8"}, "slug": "environment-modeling2", "video_id": "47_f2c-URn4", "youtube_id": "47_f2c-URn4", "readable_id": "environment-modeling2"}, "_k3aWF6_b4w": {"duration": 377, "path": "khan/math/arithmetic/multiplication-division/multi_digit_multiplication/multiplication-7-old-video-giving-more-examples/", "keywords": "multiplication, CC_4_NBT_5, CC_6_NS_3", "id": "_k3aWF6_b4w", "title": "Multiplication 7: Old video giving more examples", "description": "2 examples of multiplying a 3 digit number times a 2 digit number. 1 example of multiplying a 3 digit number times a 3 digit number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_k3aWF6_b4w.mp4/_k3aWF6_b4w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_k3aWF6_b4w.mp4/_k3aWF6_b4w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_k3aWF6_b4w.m3u8/_k3aWF6_b4w.m3u8"}, "slug": "multiplication-7-old-video-giving-more-examples", "video_id": "_k3aWF6_b4w", "youtube_id": "_k3aWF6_b4w", "readable_id": "multiplication-7-old-video-giving-more-examples"}, "MRv20I13vqM": {"duration": 608, "path": "khan/humanities/art-1010/wwi-dada/dada1/duchamp-s-shovel-art-as-concept/", "keywords": "smarthistory, MoMA, Museum of Modern Art, Art History, Duchamp, Ready-Mades, Khan Academy", "id": "MRv20I13vqM", "title": "Art as concept: Duchamp, In Advance of the Broken Arm", "description": "Marcel Duchamp, In Advance of the Broken Arm, 1964 (fourth version, after lost original of November 1915) (MoMA). A conversation with Sal Khan & Steven Zucker.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MRv20I13vqM.mp4/MRv20I13vqM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MRv20I13vqM.mp4/MRv20I13vqM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MRv20I13vqM.m3u8/MRv20I13vqM.m3u8"}, "slug": "duchamp-s-shovel-art-as-concept", "video_id": "MRv20I13vqM", "youtube_id": "MRv20I13vqM", "readable_id": "duchamp-s-shovel-art-as-concept"}, "STyoP3rCmb0": {"duration": 230, "path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/intro-to-multiplying-decimals/", "keywords": "", "id": "STyoP3rCmb0", "title": "Introduction to multiplying decimals", "description": "Multiplying decimals can be confusing because there's always the question as to where the decimals goes in the answer. We're about to show you so you'll never have to question it again!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/STyoP3rCmb0.mp4/STyoP3rCmb0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/STyoP3rCmb0.mp4/STyoP3rCmb0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/STyoP3rCmb0.m3u8/STyoP3rCmb0.m3u8"}, "slug": "intro-to-multiplying-decimals", "video_id": "STyoP3rCmb0", "youtube_id": "STyoP3rCmb0", "readable_id": "intro-to-multiplying-decimals"}, "983Tu9rlP54": {"duration": 448, "path": "khan/humanities/becoming-modern/symbolism/gustav-klimt-beethoven-frieze-vienna-secession-1902/", "keywords": "art history, smarthistory, khan academy, Gustav Klimt, Klimt, Vienna, Secession, Beethoven, Beethoven Frieze", "id": "983Tu9rlP54", "title": "Gustav Klimt, Beethoven Frieze", "description": "Gustav Klimt, Beethoven Frieze, Vienna Secession, 1902 A conversation with Khan Academy's Dr. Steven Zucker and Dr. Beth Harris\n\nIn the News: The heirs of the Austrian Jewish collector who owned this work before World War II recently lost their case to recover it.\u00a0 Learn more:\u00a0March 7, 2015 New York Times article", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/983Tu9rlP54.mp4/983Tu9rlP54.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/983Tu9rlP54.mp4/983Tu9rlP54.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/983Tu9rlP54.m3u8/983Tu9rlP54.m3u8"}, "slug": "gustav-klimt-beethoven-frieze-vienna-secession-1902", "video_id": "983Tu9rlP54", "youtube_id": "983Tu9rlP54", "readable_id": "gustav-klimt-beethoven-frieze-vienna-secession-1902"}, "v-k5L0BPOmc": {"duration": 330, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation/direct-inverse-and-joint-variation/", "keywords": "u15_l3_t1_we2, Direct, Inverse, and, Joint, Variation, CC_6_EE_9", "id": "v-k5L0BPOmc", "title": "How to determine whether a table of values represents direct or inverse variation (example)", "description": "Sal is given a table with a few values of the variables x and y, and determines whether the variables vary directly or inversely.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v-k5L0BPOmc.mp4/v-k5L0BPOmc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v-k5L0BPOmc.mp4/v-k5L0BPOmc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v-k5L0BPOmc.m3u8/v-k5L0BPOmc.m3u8"}, "slug": "direct-inverse-and-joint-variation", "video_id": "v-k5L0BPOmc", "youtube_id": "v-k5L0BPOmc", "readable_id": "direct-inverse-and-joint-variation"}, "-V51ZjxFeH4": {"duration": 293, "path": "khan/humanities/renaissance-reformation/early-renaissance1/beginners-renaissance-florence/orsanmichele-florence-1349-loggia-1380-1404-upper-stories/", "keywords": "smarthistory, Art History, Florence, Orsanmichele, Donatello, Renaissance, Humanism", "id": "-V51ZjxFeH4", "title": "Orsanmichele", "description": "Orsanmichele, Florence, 1349 loggia (1380-1404 upper stories)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-V51ZjxFeH4.mp4/-V51ZjxFeH4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-V51ZjxFeH4.mp4/-V51ZjxFeH4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-V51ZjxFeH4.m3u8/-V51ZjxFeH4.m3u8"}, "slug": "orsanmichele-florence-1349-loggia-1380-1404-upper-stories", "video_id": "-V51ZjxFeH4", "youtube_id": "-V51ZjxFeH4", "readable_id": "orsanmichele-florence-1349-loggia-1380-1404-upper-stories"}, "oa1SEjP9KAQ": {"duration": 222, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/solving_for_variable/manipulating-formula-example/", "keywords": "", "id": "oa1SEjP9KAQ", "title": "Manipulating formula example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oa1SEjP9KAQ.mp4/oa1SEjP9KAQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oa1SEjP9KAQ.mp4/oa1SEjP9KAQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oa1SEjP9KAQ.m3u8/oa1SEjP9KAQ.m3u8"}, "slug": "manipulating-formula-example", "video_id": "oa1SEjP9KAQ", "youtube_id": "oa1SEjP9KAQ", "readable_id": "manipulating-formula-example"}, "YM2G4ATOcpw": {"duration": 249, "path": "khan/math/pre-algebra/measurement/rectangle-area-perimeter-word-pr/find-width-from-perimeter/", "keywords": "", "id": "YM2G4ATOcpw", "title": "Finding width from perimeter and length", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YM2G4ATOcpw.mp4/YM2G4ATOcpw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YM2G4ATOcpw.mp4/YM2G4ATOcpw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YM2G4ATOcpw.m3u8/YM2G4ATOcpw.m3u8"}, "slug": "find-width-from-perimeter", "video_id": "YM2G4ATOcpw", "youtube_id": "YM2G4ATOcpw", "readable_id": "find-width-from-perimeter"}, "gndFqgEPNOs": {"duration": 174, "path": "khan/humanities/art-asia/southeast-asia/mainland-se-asia/shiva-and-parvati/", "keywords": "", "id": "gndFqgEPNOs", "title": "The Hindu deities Shiva and Parvati", "description": "Apart from their damaged limbs, these 1,000-year-old Cambodian sculptures survive in excellent condition, and the fact that they have remained together makes them rare. These statues would have been in the inner sanctuary of a Hindu temple, a huge stone complex built up like a step pyramid, with the sanctuary at the top. Images of Shiva acting out his power in the world might be found on the outside of an ancient Cambodian temple, but inside the temple the deity would be shown standing upright and still, conveying a sense of resolute calm to all who gazed upon him. Learn more about the deities Shiva and Parvati.\n\nThe third eye in the middle of the forehead of the male figure identifies him as the Hindu deity Shiva. His wife is Parvati. Both these deities can be represented in supernatural forms with multiple arms, and both have violent and frightening forms as well. Here, however, they are shown in the guise of a graceful young man and woman. Before and after the period of these sculptures, Angkorian art usually emphasized the power and remoteness of the gods. In the late 900s, however, and continuing for several generations, gentleness and sensitivity were sometimes emphasized. Notice here the carefully calculated contrast of minutely textured clothing and jewelry with the expanses of smooth, soft skin. The sculptor has also taken advantage of the different color tonalities of the two pieces of stone. Scientific study has shown that they came from different parts of a single quarry.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gndFqgEPNOs.mp4/gndFqgEPNOs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gndFqgEPNOs.mp4/gndFqgEPNOs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gndFqgEPNOs.m3u8/gndFqgEPNOs.m3u8"}, "slug": "shiva-and-parvati", "video_id": "gndFqgEPNOs", "youtube_id": "gndFqgEPNOs", "readable_id": "shiva-and-parvati"}, "21680hPTfUc": {"duration": 602, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-7/", "keywords": "GMAT, data, sufficiency, math", "id": "21680hPTfUc", "title": "GMAT: Data sufficiency 7", "description": "33-36, pg. 280", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/21680hPTfUc.mp4/21680hPTfUc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/21680hPTfUc.mp4/21680hPTfUc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/21680hPTfUc.m3u8/21680hPTfUc.m3u8"}, "slug": "gmat-data-sufficiency-7", "video_id": "21680hPTfUc", "youtube_id": "21680hPTfUc", "readable_id": "gmat-data-sufficiency-7"}, "UP9xy2eVj7s": {"duration": 450, "path": "khan/humanities/history/american-civics/american-civics/fica-tax/", "keywords": "FICA, federal, insurance, contributions, act", "id": "UP9xy2eVj7s", "title": "FICA tax", "description": "How the FICA tax is calculated and what it stands for", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UP9xy2eVj7s.mp4/UP9xy2eVj7s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UP9xy2eVj7s.mp4/UP9xy2eVj7s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UP9xy2eVj7s.m3u8/UP9xy2eVj7s.m3u8"}, "slug": "fica-tax", "video_id": "UP9xy2eVj7s", "youtube_id": "UP9xy2eVj7s", "readable_id": "fica-tax"}, "Z1rqLNz8Zo0": {"duration": 330, "path": "khan/test-prep/ap-art-history/indigenous-americas/coyolxauhqui-monolith/", "keywords": "Mexica, Aztec, Pre-Columbian, Mesoamerica, sculpture, Coyolxauhqui, Mexico City", "id": "Z1rqLNz8Zo0", "title": "Coyolxauhqui Stone", "description": "Coyolxauhqui Monolith (Aztec), c. 1500, volcanic stone, found Templo Mayor, Tenochtitlan, excavated 1978 (Museo del Templo Mayor, Mexico City)\nSpeakers: Dr. Beth Harris and Dr. Lauren Kilroy-Ewbank", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z1rqLNz8Zo0.mp4/Z1rqLNz8Zo0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z1rqLNz8Zo0.mp4/Z1rqLNz8Zo0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z1rqLNz8Zo0.m3u8/Z1rqLNz8Zo0.m3u8"}, "slug": "coyolxauhqui-monolith", "video_id": "Z1rqLNz8Zo0", "youtube_id": "Z1rqLNz8Zo0", "readable_id": "coyolxauhqui-monolith"}, "PvSx8oJ7PrM": {"duration": 160, "path": "khan/math/pre-algebra/order-of-operations/place_value/place-value-relationships-example/", "keywords": "", "id": "PvSx8oJ7PrM", "title": "Place value relationships example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PvSx8oJ7PrM.mp4/PvSx8oJ7PrM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PvSx8oJ7PrM.mp4/PvSx8oJ7PrM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PvSx8oJ7PrM.m3u8/PvSx8oJ7PrM.m3u8"}, "slug": "place-value-relationships-example", "video_id": "PvSx8oJ7PrM", "youtube_id": "PvSx8oJ7PrM", "readable_id": "place-value-relationships-example"}, "Ezp8F7XJHWE": {"duration": 691, "path": "khan/science/biology/macromolecules/lipids/lipid-overview/", "keywords": "education,online learning,learning,lessons,lipid,fat,triglyceride,steroid,cholesterol,phospholipid", "id": "Ezp8F7XJHWE", "title": "Lipid overview", "description": "Types of lipids including fats, waxes, steroids and phospholipids.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ezp8F7XJHWE.mp4/Ezp8F7XJHWE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ezp8F7XJHWE.mp4/Ezp8F7XJHWE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ezp8F7XJHWE.m3u8/Ezp8F7XJHWE.m3u8"}, "slug": "lipid-overview", "video_id": "Ezp8F7XJHWE", "youtube_id": "Ezp8F7XJHWE", "readable_id": "lipid-overview"}, "n8Ic2Oj-zvA": {"duration": 156, "path": "khan/math/precalculus/vectors-precalc/vector-basic/vector-representations-example/", "keywords": "", "id": "n8Ic2Oj-zvA", "title": "Vector representations exercise example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n8Ic2Oj-zvA.mp4/n8Ic2Oj-zvA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n8Ic2Oj-zvA.mp4/n8Ic2Oj-zvA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n8Ic2Oj-zvA.m3u8/n8Ic2Oj-zvA.m3u8"}, "slug": "vector-representations-example", "video_id": "n8Ic2Oj-zvA", "youtube_id": "n8Ic2Oj-zvA", "readable_id": "vector-representations-example"}, "dy12qq-ngLc": {"duration": 309, "path": "khan/partner-content/wi-phi/value-theory-1/race-and-the-carceral-state/", "keywords": "", "id": "dy12qq-ngLc", "title": "Political: Race and the Carceral State", "description": "Why do people see mass incarceration as a racial problem? What does race have to do with incarceration and what does either have to do with philosophy?\n\nSpeaker:\u00a0Olufemi Taiwo, UCLA", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dy12qq-ngLc.mp4/dy12qq-ngLc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dy12qq-ngLc.mp4/dy12qq-ngLc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dy12qq-ngLc.m3u8/dy12qq-ngLc.m3u8"}, "slug": "race-and-the-carceral-state", "video_id": "dy12qq-ngLc", "youtube_id": "dy12qq-ngLc", "readable_id": "race-and-the-carceral-state"}, "8i0j3j16yFk": {"duration": 496, "path": "khan/science/physics/newton-gravitation/gravity-newtonian/gravitation-part-2/", "keywords": "newton, law, of, gravity, gravitational, constant, mass, force", "id": "8i0j3j16yFk", "title": "Gravitation (part 2)", "description": "A little bit more on gravity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8i0j3j16yFk.mp4/8i0j3j16yFk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8i0j3j16yFk.mp4/8i0j3j16yFk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8i0j3j16yFk.m3u8/8i0j3j16yFk.m3u8"}, "slug": "gravitation-part-2", "video_id": "8i0j3j16yFk", "youtube_id": "8i0j3j16yFk", "readable_id": "gravitation-part-2"}, "M8TOJrI6cJc": {"duration": 630, "path": "khan/test-prep/gmat/problem-solving/gmat-math-14/", "keywords": "gmat, math, problem, solving", "id": "M8TOJrI6cJc", "title": "GMAT: Math 14", "description": "76-80, pg. 162", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M8TOJrI6cJc.mp4/M8TOJrI6cJc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M8TOJrI6cJc.mp4/M8TOJrI6cJc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M8TOJrI6cJc.m3u8/M8TOJrI6cJc.m3u8"}, "slug": "gmat-math-14", "video_id": "M8TOJrI6cJc", "youtube_id": "M8TOJrI6cJc", "readable_id": "gmat-math-14"}, "xo4VpX2IIMk": {"duration": 364, "path": "khan/math/pre-algebra/measurement/area-basics/calculating-the-square-footage-of-a-house/", "keywords": "", "id": "xo4VpX2IIMk", "title": "Calculating the square footage of a house", "description": "Decompose an irregular shape to find area of entire figure.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xo4VpX2IIMk.mp4/xo4VpX2IIMk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xo4VpX2IIMk.mp4/xo4VpX2IIMk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xo4VpX2IIMk.m3u8/xo4VpX2IIMk.m3u8"}, "slug": "calculating-the-square-footage-of-a-house", "video_id": "xo4VpX2IIMk", "youtube_id": "xo4VpX2IIMk", "readable_id": "calculating-the-square-footage-of-a-house"}, "81SseQCpGws": {"duration": 240, "path": "khan/math/algebra-basics/core-algebra-graphing-lines-slope/core-algebra-slope/graphical-slope-of-a-line/", "keywords": "u13_l2_t1_we1, Graphical, Slope, of, Line, CC_8_EE_5, CC_8_EE_6, CC_8_F_5", "id": "81SseQCpGws", "title": "Graphical slope of a line", "description": "Graphical Slope of a Line", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/81SseQCpGws.mp4/81SseQCpGws.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/81SseQCpGws.mp4/81SseQCpGws.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/81SseQCpGws.m3u8/81SseQCpGws.m3u8"}, "slug": "graphical-slope-of-a-line", "video_id": "81SseQCpGws", "youtube_id": "81SseQCpGws", "readable_id": "graphical-slope-of-a-line"}, "Bf04LcSBpDw": {"duration": 687, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/labor/", "keywords": "", "id": "Bf04LcSBpDw", "title": "Labor", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Bf04LcSBpDw.mp4/Bf04LcSBpDw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Bf04LcSBpDw.mp4/Bf04LcSBpDw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Bf04LcSBpDw.m3u8/Bf04LcSBpDw.m3u8"}, "slug": "labor", "video_id": "Bf04LcSBpDw", "youtube_id": "Bf04LcSBpDw", "readable_id": "labor"}, "Nb6EQUS8hDo": {"duration": 225, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/lucian-freud-standing-by-the-rags-1988-89/", "keywords": "smarthistory, Lucian Freud, Standing by the Rags, Tate Britain, 20th century painting", "id": "Nb6EQUS8hDo", "title": "Freud, Standing by the Rags", "description": "Lucian Freud, Standing by the Rags, 1988-89, oil on canvas, 66.5 x 54.5 in. (168.9 x 138.4 cm), (Tate Britain, London) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Nb6EQUS8hDo.mp4/Nb6EQUS8hDo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Nb6EQUS8hDo.mp4/Nb6EQUS8hDo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Nb6EQUS8hDo.m3u8/Nb6EQUS8hDo.m3u8"}, "slug": "lucian-freud-standing-by-the-rags-1988-89", "video_id": "Nb6EQUS8hDo", "youtube_id": "Nb6EQUS8hDo", "readable_id": "lucian-freud-standing-by-the-rags-1988-89"}, "AAWsuFXojgo": {"duration": 573, "path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/elasticity-of-supply/", "keywords": "economics, elasticity", "id": "AAWsuFXojgo", "title": "Elasticity of supply", "description": "Thinking about elasticity of supply", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AAWsuFXojgo.mp4/AAWsuFXojgo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AAWsuFXojgo.mp4/AAWsuFXojgo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AAWsuFXojgo.m3u8/AAWsuFXojgo.m3u8"}, "slug": "elasticity-of-supply", "video_id": "AAWsuFXojgo", "youtube_id": "AAWsuFXojgo", "readable_id": "elasticity-of-supply"}, "FttqXKdw_Xk": {"duration": 870, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/increasing-the-heart-s-force-of-contraction/", "keywords": "", "id": "FttqXKdw_Xk", "title": "Increasing the heart's force of contraction", "description": "Find out exactly how stretch increases force of contraction in end-diastole, whereas more calcium increased force of contraction in end-systole. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FttqXKdw_Xk.mp4/FttqXKdw_Xk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FttqXKdw_Xk.mp4/FttqXKdw_Xk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FttqXKdw_Xk.m3u8/FttqXKdw_Xk.m3u8"}, "slug": "increasing-the-heart-s-force-of-contraction", "video_id": "FttqXKdw_Xk", "youtube_id": "FttqXKdw_Xk", "readable_id": "increasing-the-heart-s-force-of-contraction"}, "XR52dXLyz-M": {"duration": 461, "path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/specular-and-diffuse-reflection-2/", "keywords": "Specular, and, Diffuse, Reflection", "id": "XR52dXLyz-M", "title": "Specular and diffuse reflection 2", "description": "Specular and Diffuse Reflection 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XR52dXLyz-M.mp4/XR52dXLyz-M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XR52dXLyz-M.mp4/XR52dXLyz-M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XR52dXLyz-M.m3u8/XR52dXLyz-M.m3u8"}, "slug": "specular-and-diffuse-reflection-2", "video_id": "XR52dXLyz-M", "youtube_id": "XR52dXLyz-M", "readable_id": "specular-and-diffuse-reflection-2"}, "2yjSAarzWF8": {"duration": 133, "path": "khan/math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity/comparing-side-lengths-after-dilation/", "keywords": "", "id": "2yjSAarzWF8", "title": "Comparing side lengths after dilation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2yjSAarzWF8.mp4/2yjSAarzWF8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2yjSAarzWF8.mp4/2yjSAarzWF8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2yjSAarzWF8.m3u8/2yjSAarzWF8.m3u8"}, "slug": "comparing-side-lengths-after-dilation", "video_id": "2yjSAarzWF8", "youtube_id": "2yjSAarzWF8", "readable_id": "comparing-side-lengths-after-dilation"}, "QWX39H9kKvE": {"duration": 119, "path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/performing-a-rotation-to-match-figures/", "keywords": "", "id": "QWX39H9kKvE", "title": "Performing a rotation to match figures", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QWX39H9kKvE.mp4/QWX39H9kKvE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QWX39H9kKvE.mp4/QWX39H9kKvE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QWX39H9kKvE.m3u8/QWX39H9kKvE.m3u8"}, "slug": "performing-a-rotation-to-match-figures", "video_id": "QWX39H9kKvE", "youtube_id": "QWX39H9kKvE", "readable_id": "performing-a-rotation-to-match-figures"}, "7BFx8pt2aTQ": {"duration": 676, "path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/linear-algebra-introduction-to-orthonormal-bases/", "keywords": "orthonormal, basis, orthogonal, set, normal, normailzed", "id": "7BFx8pt2aTQ", "title": "Introduction to orthonormal bases", "description": "Looking at sets and bases that are orthonormal -- or where all the vectors have length 1 and are orthogonal to each other.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7BFx8pt2aTQ.mp4/7BFx8pt2aTQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7BFx8pt2aTQ.mp4/7BFx8pt2aTQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7BFx8pt2aTQ.m3u8/7BFx8pt2aTQ.m3u8"}, "slug": "linear-algebra-introduction-to-orthonormal-bases", "video_id": "7BFx8pt2aTQ", "youtube_id": "7BFx8pt2aTQ", "readable_id": "linear-algebra-introduction-to-orthonormal-bases"}, "riXcZT2ICjA": {"duration": 692, "path": "khan/math/differential-calculus/limits_topic/limits_tutorial/introduction-to-limits-hd/", "keywords": "calculus, CC_39336_A-CED_2, CC_39336_A-REI_3", "id": "riXcZT2ICjA", "title": "Introduction to limits", "description": "Introduction to limits", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/riXcZT2ICjA.mp4/riXcZT2ICjA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/riXcZT2ICjA.mp4/riXcZT2ICjA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/riXcZT2ICjA.m3u8/riXcZT2ICjA.m3u8"}, "slug": "introduction-to-limits-hd", "video_id": "riXcZT2ICjA", "youtube_id": "riXcZT2ICjA", "readable_id": "introduction-to-limits-hd"}, "XyDMsotfJhE": {"duration": 260, "path": "khan/math/algebra2/conics_precalc/circles-tutorial-precalc/completing-the-square-to-write-equation-in-standard-form-of-a-circle/", "keywords": "", "id": "XyDMsotfJhE", "title": "Completing the square to write equation in standard form of a circle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XyDMsotfJhE.mp4/XyDMsotfJhE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XyDMsotfJhE.mp4/XyDMsotfJhE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XyDMsotfJhE.m3u8/XyDMsotfJhE.m3u8"}, "slug": "completing-the-square-to-write-equation-in-standard-form-of-a-circle", "video_id": "XyDMsotfJhE", "youtube_id": "XyDMsotfJhE", "readable_id": "completing-the-square-to-write-equation-in-standard-form-of-a-circle"}, "nwULacjb78c": {"duration": 700, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/sn1-reaction-mechanism/", "keywords": "", "id": "nwULacjb78c", "title": "Sn1 reaction: Mechanism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nwULacjb78c.mp4/nwULacjb78c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nwULacjb78c.mp4/nwULacjb78c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nwULacjb78c.m3u8/nwULacjb78c.m3u8"}, "slug": "sn1-reaction-mechanism", "video_id": "nwULacjb78c", "youtube_id": "nwULacjb78c", "readable_id": "sn1-reaction-mechanism"}, "P3IlneCNm8A": {"duration": 357, "path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/graphs-of-functions-and-their-derivatives-example-1/", "keywords": "", "id": "P3IlneCNm8A", "title": "Graphs of functions and their derivatives example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P3IlneCNm8A.mp4/P3IlneCNm8A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P3IlneCNm8A.mp4/P3IlneCNm8A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P3IlneCNm8A.m3u8/P3IlneCNm8A.m3u8"}, "slug": "graphs-of-functions-and-their-derivatives-example-1", "video_id": "P3IlneCNm8A", "youtube_id": "P3IlneCNm8A", "readable_id": "graphs-of-functions-and-their-derivatives-example-1"}, "mJ1P4A-KA8k": {"duration": 115, "path": "khan/math/algebra-basics/core-algebra-foundations/world-of-exponents-college-readiness/understanding-exponents/", "keywords": "U01_L5_T1_we1, Understanding, Exponents, CC_6_EE_1", "id": "mJ1P4A-KA8k", "title": "Exponent example 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mJ1P4A-KA8k.mp4/mJ1P4A-KA8k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mJ1P4A-KA8k.mp4/mJ1P4A-KA8k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mJ1P4A-KA8k.m3u8/mJ1P4A-KA8k.m3u8"}, "slug": "understanding-exponents", "video_id": "mJ1P4A-KA8k", "youtube_id": "mJ1P4A-KA8k", "readable_id": "understanding-exponents"}, "u9v_bakOIcU": {"duration": 378, "path": "khan/math/algebra2/manipulating-functions/combining-functions/quotient-of-functions/", "keywords": "u17_l3_t1_we4, Quotient, of, Functions", "id": "u9v_bakOIcU", "title": "How to combine functions by dividing them (example)", "description": "Sal solves the following problem: given that f(x)=2x^2+15x-8 and g(x)=x^2+10x+16, find (f/g)(x). He explains that generally, (f/g)(x)=f(x)/g(x).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u9v_bakOIcU.mp4/u9v_bakOIcU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u9v_bakOIcU.mp4/u9v_bakOIcU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u9v_bakOIcU.m3u8/u9v_bakOIcU.m3u8"}, "slug": "quotient-of-functions", "video_id": "u9v_bakOIcU", "youtube_id": "u9v_bakOIcU", "readable_id": "quotient-of-functions"}, "sJmLjUj_h68": {"duration": 123, "path": "khan/math/pre-algebra/measurement/perimeter/perimeter-of-a-shape/", "keywords": "", "id": "sJmLjUj_h68", "title": "Perimeter of a shape", "description": "Find perimeter of various shapes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sJmLjUj_h68.mp4/sJmLjUj_h68.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sJmLjUj_h68.mp4/sJmLjUj_h68.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sJmLjUj_h68.m3u8/sJmLjUj_h68.m3u8"}, "slug": "perimeter-of-a-shape", "video_id": "sJmLjUj_h68", "youtube_id": "sJmLjUj_h68", "readable_id": "perimeter-of-a-shape"}, "AtlhAhONHyM": {"duration": 849, "path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/renin-production-in-the-kidneys/", "keywords": "", "id": "AtlhAhONHyM", "title": "Renin production in the kidneys", "description": "Learn the three major triggers for Renin production by the Juxtaglomerular cells. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AtlhAhONHyM.mp4/AtlhAhONHyM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AtlhAhONHyM.mp4/AtlhAhONHyM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AtlhAhONHyM.m3u8/AtlhAhONHyM.m3u8"}, "slug": "renin-production-in-the-kidneys", "video_id": "AtlhAhONHyM", "youtube_id": "AtlhAhONHyM", "readable_id": "renin-production-in-the-kidneys"}, "8uLzMKrO1FU": {"duration": 240, "path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-switchblock/", "keywords": "", "id": "8uLzMKrO1FU", "title": "Switch block", "description": "Control robot behavior based on some condition", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8uLzMKrO1FU.mp4/8uLzMKrO1FU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8uLzMKrO1FU.mp4/8uLzMKrO1FU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8uLzMKrO1FU.m3u8/8uLzMKrO1FU.m3u8"}, "slug": "lego-switchblock", "video_id": "8uLzMKrO1FU", "youtube_id": "8uLzMKrO1FU", "readable_id": "lego-switchblock"}, "v-H_7o7EMoU": {"duration": 399, "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-3-c/", "keywords": "solid, rotation, disk, method", "id": "v-H_7o7EMoU", "title": "2011 Calculus AB free response #3 (c)", "description": "Disk method to find the volume of a solid generated by rotation of a function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v-H_7o7EMoU.mp4/v-H_7o7EMoU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v-H_7o7EMoU.mp4/v-H_7o7EMoU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v-H_7o7EMoU.m3u8/v-H_7o7EMoU.m3u8"}, "slug": "2011-calculus-ab-free-response-3-c", "video_id": "v-H_7o7EMoU", "youtube_id": "v-H_7o7EMoU", "readable_id": "2011-calculus-ab-free-response-3-c"}, "2-yaOVXG6rQ": {"duration": 212, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q8-easier/", "keywords": "", "id": "2-yaOVXG6rQ", "title": "Data inferences \u2014 Basic example", "description": "Watch Sal work through a basic Data inferences problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2-yaOVXG6rQ.mp4/2-yaOVXG6rQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2-yaOVXG6rQ.mp4/2-yaOVXG6rQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2-yaOVXG6rQ.m3u8/2-yaOVXG6rQ.m3u8"}, "slug": "sat-math-q8-easier", "video_id": "2-yaOVXG6rQ", "youtube_id": "2-yaOVXG6rQ", "readable_id": "sat-math-q8-easier"}, "X7B_tH4O-_s": {"duration": 837, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factor-by-grouping-and-factoring-completely/", "keywords": "Factor, by, Grouping, and, Factoring, Completely, CC_39336_A-REI_4_b, CC_39336_A-SSE_2, CC_39336_F-IF_8_a", "id": "X7B_tH4O-_s", "title": "More examples of factoring by grouping", "description": "Can't get enough of Sal factoring quadratics by grouping? Here's a handful of examples just for you!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X7B_tH4O-_s.mp4/X7B_tH4O-_s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X7B_tH4O-_s.mp4/X7B_tH4O-_s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X7B_tH4O-_s.m3u8/X7B_tH4O-_s.m3u8"}, "slug": "factor-by-grouping-and-factoring-completely", "video_id": "X7B_tH4O-_s", "youtube_id": "X7B_tH4O-_s", "readable_id": "factor-by-grouping-and-factoring-completely"}, "aT2UN7y1rhc": {"duration": 118, "path": "khan/math/probability/regression/prob-stats-scatter-plots/constructing-scatter-plot-exercise-example/", "keywords": "", "id": "aT2UN7y1rhc", "title": "Constructing scatter plot exercise example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aT2UN7y1rhc.mp4/aT2UN7y1rhc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aT2UN7y1rhc.mp4/aT2UN7y1rhc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aT2UN7y1rhc.m3u8/aT2UN7y1rhc.m3u8"}, "slug": "constructing-scatter-plot-exercise-example", "video_id": "aT2UN7y1rhc", "youtube_id": "aT2UN7y1rhc", "readable_id": "constructing-scatter-plot-exercise-example"}, "Ig7RSc-93Bs": {"duration": 232, "path": "khan/math/algebra-basics/core-algebra-foundations/alg-basics-absolute-value/absolute-value-word-problems-exercise/", "keywords": "", "id": "Ig7RSc-93Bs", "title": "Absolute value word problems", "description": "Here are a few word problems that ask us to apply our new absolute value knowledge. As with all word problems, read them a couple of times before jumping to an answer.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ig7RSc-93Bs.mp4/Ig7RSc-93Bs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ig7RSc-93Bs.mp4/Ig7RSc-93Bs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ig7RSc-93Bs.m3u8/Ig7RSc-93Bs.m3u8"}, "slug": "absolute-value-word-problems-exercise", "video_id": "Ig7RSc-93Bs", "youtube_id": "Ig7RSc-93Bs", "readable_id": "absolute-value-word-problems-exercise"}, "hC6zx9WAiC4": {"duration": 344, "path": "khan/math/geometry/basic-geometry/volume_tutorial/volume-cone-example/", "keywords": "", "id": "hC6zx9WAiC4", "title": "Volume of a cone", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hC6zx9WAiC4.mp4/hC6zx9WAiC4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hC6zx9WAiC4.mp4/hC6zx9WAiC4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hC6zx9WAiC4.m3u8/hC6zx9WAiC4.m3u8"}, "slug": "volume-cone-example", "video_id": "hC6zx9WAiC4", "youtube_id": "hC6zx9WAiC4", "readable_id": "volume-cone-example"}, "OwDXViQn6tw": {"duration": 768, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/diagnosis-of-myocarditis-and-pericarditis-part-1/", "keywords": "", "id": "OwDXViQn6tw", "title": "Diagnosis of myocarditis and pericarditis (part 1)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OwDXViQn6tw.mp4/OwDXViQn6tw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OwDXViQn6tw.mp4/OwDXViQn6tw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OwDXViQn6tw.m3u8/OwDXViQn6tw.m3u8"}, "slug": "diagnosis-of-myocarditis-and-pericarditis-part-1", "video_id": "OwDXViQn6tw", "youtube_id": "OwDXViQn6tw", "readable_id": "diagnosis-of-myocarditis-and-pericarditis-part-1"}, "8XCugIQXK-s": {"duration": 786, "path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/more-on-newtons-third-law/", "keywords": "", "id": "8XCugIQXK-s", "title": "More on Newton's third law", "description": "In this video David explains some of the common misconceptions in dealing with Newton's Third Law. He also shows how to correctly and reliably identify Third Law force pairs.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8XCugIQXK-s.mp4/8XCugIQXK-s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8XCugIQXK-s.mp4/8XCugIQXK-s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8XCugIQXK-s.m3u8/8XCugIQXK-s.m3u8"}, "slug": "more-on-newtons-third-law", "video_id": "8XCugIQXK-s", "youtube_id": "8XCugIQXK-s", "readable_id": "more-on-newtons-third-law"}, "vce3BZFo27Y": {"duration": 523, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/drug-resistant-tb/", "keywords": "", "id": "vce3BZFo27Y", "title": "Drug-resistant TB", "description": "Learn the different types of drug-resistant TB \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vce3BZFo27Y.mp4/vce3BZFo27Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vce3BZFo27Y.mp4/vce3BZFo27Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vce3BZFo27Y.m3u8/vce3BZFo27Y.m3u8"}, "slug": "drug-resistant-tb", "video_id": "vce3BZFo27Y", "youtube_id": "vce3BZFo27Y", "readable_id": "drug-resistant-tb"}, "AnwPH5yU8rY": {"duration": 558, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/understanding-the-pressure-volume-loop/", "keywords": "", "id": "AnwPH5yU8rY", "title": "Understanding the pressure-volume loop", "description": "Figure out how all of those physiology terms: end-systolic, end-diastolic, pulse pressure, stroke volume, and ejection fraction, can be easily figured out using the pressure-volume loop. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AnwPH5yU8rY.mp4/AnwPH5yU8rY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AnwPH5yU8rY.mp4/AnwPH5yU8rY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AnwPH5yU8rY.m3u8/AnwPH5yU8rY.m3u8"}, "slug": "understanding-the-pressure-volume-loop", "video_id": "AnwPH5yU8rY", "youtube_id": "AnwPH5yU8rY", "readable_id": "understanding-the-pressure-volume-loop"}, "RNxwasijbAo": {"duration": 213, "path": "khan/math/arithmetic/multiplication-division/mult-div-concept/multiplication-intro/", "keywords": "", "id": "RNxwasijbAo", "title": "Intro to multiplication", "description": "Use arrays and repeated addition to visualize multiplication.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RNxwasijbAo.mp4/RNxwasijbAo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RNxwasijbAo.mp4/RNxwasijbAo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RNxwasijbAo.m3u8/RNxwasijbAo.m3u8"}, "slug": "multiplication-intro", "video_id": "RNxwasijbAo", "youtube_id": "RNxwasijbAo", "readable_id": "multiplication-intro"}, "lCvBp73ZJ-A": {"duration": 552, "path": "khan/science/biology/water-acids-and-bases/hydrogen-bonding-in-water/water-as-a-solvent/", "keywords": "education,online learning,learning,lessons,polarity,hydrophilic,hydrophobic,solute,solvent", "id": "lCvBp73ZJ-A", "title": "Water as a solvent", "description": "Water as a solvent. Polar solutes. Hydrophilic and hydrophobic substances.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lCvBp73ZJ-A.mp4/lCvBp73ZJ-A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lCvBp73ZJ-A.mp4/lCvBp73ZJ-A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lCvBp73ZJ-A.m3u8/lCvBp73ZJ-A.m3u8"}, "slug": "water-as-a-solvent", "video_id": "lCvBp73ZJ-A", "youtube_id": "lCvBp73ZJ-A", "readable_id": "water-as-a-solvent"}, "15zliAL4llE": {"duration": 547, "path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/projectile-motion-part-1/", "keywords": "physics, projectile, acceleration, gravity, velocity", "id": "15zliAL4llE", "title": "Projectile motion (part 1)", "description": "Using the equations of motion to figure out things about falling objects", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/15zliAL4llE.mp4/15zliAL4llE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/15zliAL4llE.mp4/15zliAL4llE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/15zliAL4llE.m3u8/15zliAL4llE.m3u8"}, "slug": "projectile-motion-part-1", "video_id": "15zliAL4llE", "youtube_id": "15zliAL4llE", "readable_id": "projectile-motion-part-1"}, "lVacrVMmJX8": {"duration": 464, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/breathing-control/central-chemoreceptors/", "keywords": "", "id": "lVacrVMmJX8", "title": "Central chemoreceptors", "description": "Find out how the your body uses special cells that are central to the brain (inside the brain) to sense levels of CO2 and pH. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lVacrVMmJX8.mp4/lVacrVMmJX8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lVacrVMmJX8.mp4/lVacrVMmJX8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lVacrVMmJX8.m3u8/lVacrVMmJX8.m3u8"}, "slug": "central-chemoreceptors", "video_id": "lVacrVMmJX8", "youtube_id": "lVacrVMmJX8", "readable_id": "central-chemoreceptors"}, "ihXlnX3gJTU": {"duration": 481, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e2-elimination-stereospecificity/", "keywords": "", "id": "ihXlnX3gJTU", "title": "E2 elimination: Stereospecificity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ihXlnX3gJTU.mp4/ihXlnX3gJTU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ihXlnX3gJTU.mp4/ihXlnX3gJTU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ihXlnX3gJTU.m3u8/ihXlnX3gJTU.m3u8"}, "slug": "e2-elimination-stereospecificity", "video_id": "ihXlnX3gJTU", "youtube_id": "ihXlnX3gJTU", "readable_id": "e2-elimination-stereospecificity"}, "bvAd_oddj9w": {"duration": 29, "path": "khan/partner-content/exploratorium/light-and-color/soap-film-on-can/soap-film-intro/", "keywords": "", "id": "bvAd_oddj9w", "title": "Introduction: Why do we see colors in oily water and soap bubbles?", "description": "Soap bubbles are transparent, so where do all those beautiful, constantly shifting colors we see\u00a0come from?\u00a0In this science snack activity,\u00a0Paul Doherty of the Exploratorium Teacher Institute presents an easy way to explore and understand the science in your suds. Hint: think water sandwich!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bvAd_oddj9w.mp4/bvAd_oddj9w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bvAd_oddj9w.mp4/bvAd_oddj9w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bvAd_oddj9w.m3u8/bvAd_oddj9w.m3u8"}, "slug": "soap-film-intro", "video_id": "bvAd_oddj9w", "youtube_id": "bvAd_oddj9w", "readable_id": "soap-film-intro"}, "i8caGm9Fmh0": {"duration": 323, "path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/infrared-waves/", "keywords": "", "id": "i8caGm9Fmh0", "title": "Infrared waves (1800)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i8caGm9Fmh0.mp4/i8caGm9Fmh0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i8caGm9Fmh0.mp4/i8caGm9Fmh0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i8caGm9Fmh0.m3u8/i8caGm9Fmh0.m3u8"}, "slug": "infrared-waves", "video_id": "i8caGm9Fmh0", "youtube_id": "i8caGm9Fmh0", "readable_id": "infrared-waves"}, "OhJKDqZgNXg": {"duration": 226, "path": "khan/humanities/ancient-art-civilizations/greek-art/classical/myron-discobolus-discus-thrower-roman-copy-of-an-ancient-greek-bronze-from-c-450-b-c-e/", "keywords": "", "id": "OhJKDqZgNXg", "title": "Myron, Discobolus (Discus Thrower), Roman copy of an ancient Greek bronze", "description": "Myron, Discobolus (Discus Thrower), Roman copy of an ancient Greek bronze from c. 450 B.C.E., Classical Period (Palazzo Massimo alle Terme). \n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OhJKDqZgNXg.mp4/OhJKDqZgNXg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OhJKDqZgNXg.mp4/OhJKDqZgNXg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OhJKDqZgNXg.m3u8/OhJKDqZgNXg.m3u8"}, "slug": "myron-discobolus-discus-thrower-roman-copy-of-an-ancient-greek-bronze-from-c-450-b-c-e", "video_id": "OhJKDqZgNXg", "youtube_id": "OhJKDqZgNXg", "readable_id": "myron-discobolus-discus-thrower-roman-copy-of-an-ancient-greek-bronze-from-c-450-b-c-e"}, "Hhc96U_HvQE": {"duration": 719, "path": "khan/math/linear-algebra/matrix_transformations/composition_of_transformations/matrix-product-associativity/", "keywords": "associate, matrix, products", "id": "Hhc96U_HvQE", "title": "Matrix product associativity", "description": "Showing that matrix products are associative", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hhc96U_HvQE.mp4/Hhc96U_HvQE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hhc96U_HvQE.mp4/Hhc96U_HvQE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hhc96U_HvQE.m3u8/Hhc96U_HvQE.m3u8"}, "slug": "matrix-product-associativity", "video_id": "Hhc96U_HvQE", "youtube_id": "Hhc96U_HvQE", "readable_id": "matrix-product-associativity"}, "r5L-riaIJjI": {"duration": 512, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/inequality-good-or-bad/", "keywords": "", "id": "r5L-riaIJjI", "title": "Is rising inequality necessarily bad?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/r5L-riaIJjI.mp4/r5L-riaIJjI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/r5L-riaIJjI.mp4/r5L-riaIJjI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/r5L-riaIJjI.m3u8/r5L-riaIJjI.m3u8"}, "slug": "inequality-good-or-bad", "video_id": "r5L-riaIJjI", "youtube_id": "r5L-riaIJjI", "readable_id": "inequality-good-or-bad"}, "bGNMXfaNR5Q": {"duration": 1008, "path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/mean-value-theorem/", "keywords": "calculus, mean, value, theorem, CC_39336_F-IF_6", "id": "bGNMXfaNR5Q", "title": "Mean value theorem", "description": "Intuition behind the Mean Value Theorem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bGNMXfaNR5Q.mp4/bGNMXfaNR5Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bGNMXfaNR5Q.mp4/bGNMXfaNR5Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bGNMXfaNR5Q.m3u8/bGNMXfaNR5Q.m3u8"}, "slug": "mean-value-theorem", "video_id": "bGNMXfaNR5Q", "youtube_id": "bGNMXfaNR5Q", "readable_id": "mean-value-theorem"}, "O33b6B12YxI": {"duration": 566, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/nucleophile-electrophile-and-the-schwartz-rules/", "keywords": "", "id": "O33b6B12YxI", "title": "Nucleophile/electrophile and the schwartz rules", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O33b6B12YxI.mp4/O33b6B12YxI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O33b6B12YxI.mp4/O33b6B12YxI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O33b6B12YxI.m3u8/O33b6B12YxI.m3u8"}, "slug": "nucleophile-electrophile-and-the-schwartz-rules", "video_id": "O33b6B12YxI", "youtube_id": "O33b6B12YxI", "readable_id": "nucleophile-electrophile-and-the-schwartz-rules"}, "zTLxxezKUT8": {"duration": 218, "path": "khan/math/algebra/linear_inequalities/structure-expressions-linear/using-expressions-to-understand-relationships/", "keywords": "", "id": "zTLxxezKUT8", "title": "Using expressions to understand relationships", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zTLxxezKUT8.mp4/zTLxxezKUT8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zTLxxezKUT8.mp4/zTLxxezKUT8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zTLxxezKUT8.m3u8/zTLxxezKUT8.m3u8"}, "slug": "using-expressions-to-understand-relationships", "video_id": "zTLxxezKUT8", "youtube_id": "zTLxxezKUT8", "readable_id": "using-expressions-to-understand-relationships"}, "LhFXw1xmaSM": {"duration": 451, "path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/substance-use-disorders/", "keywords": "", "id": "LhFXw1xmaSM", "title": "Substance use disorders", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LhFXw1xmaSM.mp4/LhFXw1xmaSM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LhFXw1xmaSM.mp4/LhFXw1xmaSM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LhFXw1xmaSM.m3u8/LhFXw1xmaSM.m3u8"}, "slug": "substance-use-disorders", "video_id": "LhFXw1xmaSM", "youtube_id": "LhFXw1xmaSM", "readable_id": "substance-use-disorders"}, "ST6mSB-RvE0": {"duration": 590, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders/what-is-chronic-myelogenous-leukemia/", "keywords": "", "id": "ST6mSB-RvE0", "title": "What is chronic myelogenous leukemia?", "description": "Learn what is chronic myelogenous leukemia as well as how to identify its signs and symptoms, diagnose it, and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ST6mSB-RvE0.mp4/ST6mSB-RvE0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ST6mSB-RvE0.mp4/ST6mSB-RvE0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ST6mSB-RvE0.m3u8/ST6mSB-RvE0.m3u8"}, "slug": "what-is-chronic-myelogenous-leukemia", "video_id": "ST6mSB-RvE0", "youtube_id": "ST6mSB-RvE0", "readable_id": "what-is-chronic-myelogenous-leukemia"}, "incKJchBCLo": {"duration": 752, "path": "khan/math/arithmetic/addition-subtraction/two_dig_add_sub/subtraction-2/", "keywords": "subtraction, difference, take, away, CC_1_OA_6, CC_2_OA_1", "id": "incKJchBCLo", "title": "Subtraction 2", "description": "Different ways to view subtraction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/incKJchBCLo.mp4/incKJchBCLo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/incKJchBCLo.mp4/incKJchBCLo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/incKJchBCLo.m3u8/incKJchBCLo.m3u8"}, "slug": "subtraction-2", "video_id": "incKJchBCLo", "youtube_id": "incKJchBCLo", "readable_id": "subtraction-2"}, "kZoFI_fcC74": {"duration": 111, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/why-of-algebra/one-step-equation-intuition-exercise-intro/", "keywords": "", "id": "kZoFI_fcC74", "title": "How to use the one-step equation intuition exercise", "description": "To find the value of a variable, you sometimes have to get it on one side of the equation alone. To do that, you'll need to do something to BOTH sides of the equation. Watch. We'll explain why we do this.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kZoFI_fcC74.mp4/kZoFI_fcC74.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kZoFI_fcC74.mp4/kZoFI_fcC74.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kZoFI_fcC74.m3u8/kZoFI_fcC74.m3u8"}, "slug": "one-step-equation-intuition-exercise-intro", "video_id": "kZoFI_fcC74", "youtube_id": "kZoFI_fcC74", "readable_id": "one-step-equation-intuition-exercise-intro"}, "ntxMOKXHlfo": {"duration": 534, "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/monetary-fiscal-policy/monetary-and-fiscal-policy/", "keywords": "macroeconomics", "id": "ntxMOKXHlfo", "title": "Monetary and fiscal policy", "description": "Basic mechanics of monetary and fiscal policy", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ntxMOKXHlfo.mp4/ntxMOKXHlfo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ntxMOKXHlfo.mp4/ntxMOKXHlfo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ntxMOKXHlfo.m3u8/ntxMOKXHlfo.m3u8"}, "slug": "monetary-and-fiscal-policy", "video_id": "ntxMOKXHlfo", "youtube_id": "ntxMOKXHlfo", "readable_id": "monetary-and-fiscal-policy"}, "FdD0Wu032R4": {"duration": 108, "path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-52-53/", "keywords": "CAHSEE, practice, california, high, school, exit, examination", "id": "FdD0Wu032R4", "title": "CAHSEE practice: Problems 52-53", "description": "CAHSEE Practice: Problems 52-53", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FdD0Wu032R4.mp4/FdD0Wu032R4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FdD0Wu032R4.mp4/FdD0Wu032R4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FdD0Wu032R4.m3u8/FdD0Wu032R4.m3u8"}, "slug": "cahsee-practice-problems-52-53", "video_id": "FdD0Wu032R4", "youtube_id": "FdD0Wu032R4", "readable_id": "cahsee-practice-problems-52-53"}, "REeBUSYRzRo": {"duration": 256, "path": "khan/humanities/ancient-art-civilizations/greek-art/late-classical/lysippos-apoxyomenos-scraper-c-330-b-c-e-roman-copy/", "keywords": "lysippos, Apoxyomenos, art history", "id": "REeBUSYRzRo", "title": "Lysippos, Apoxyomenos (Scraper)", "description": "Lysippos,\u00a0Apoxyomenos (Scraper, Roman copy after a bronze statue from c. 330 B.C.E., 6' 9\" high (Vatican Museums).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/REeBUSYRzRo.mp4/REeBUSYRzRo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/REeBUSYRzRo.mp4/REeBUSYRzRo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/REeBUSYRzRo.m3u8/REeBUSYRzRo.m3u8"}, "slug": "lysippos-apoxyomenos-scraper-c-330-b-c-e-roman-copy", "video_id": "REeBUSYRzRo", "youtube_id": "REeBUSYRzRo", "readable_id": "lysippos-apoxyomenos-scraper-c-330-b-c-e-roman-copy"}, "jW8-Ni-MeN4": {"duration": 407, "path": "khan/humanities/art-africa/west-africa/sierra-leone/sowei-mask/", "keywords": "", "id": "jW8-Ni-MeN4", "title": "Sowei mask: Spirit of Sierra Leone", "description": "Unique to the region around Sierra Leone, sowei masks are worn by senior members of the all-female Sande Society during rite-of-passage ceremonies that signify a girl's transition to adulthood.\u00a0\n\nEach mask has an individual personality and is given a name which is revealed in a dream. For many years the name of this mask was lost. However, in a special ceremony in January 2013 members of the Sierra Leonean diaspora community in London gave the mask a new name:\u00a0Gbavo, meaning \u2018crowd-puller\u2019 or \u2018to attract people\u2019s attention\u2019. The newly-named mask was then formally re-presented to the British Museum. \u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jW8-Ni-MeN4.mp4/jW8-Ni-MeN4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jW8-Ni-MeN4.mp4/jW8-Ni-MeN4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jW8-Ni-MeN4.m3u8/jW8-Ni-MeN4.m3u8"}, "slug": "sowei-mask", "video_id": "jW8-Ni-MeN4", "youtube_id": "jW8-Ni-MeN4", "readable_id": "sowei-mask"}, "1exN1kFX2wI": {"duration": 290, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/sheehan-syndrome/", "keywords": "", "id": "1exN1kFX2wI", "title": "Sheehan syndrome", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1exN1kFX2wI.mp4/1exN1kFX2wI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1exN1kFX2wI.mp4/1exN1kFX2wI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1exN1kFX2wI.m3u8/1exN1kFX2wI.m3u8"}, "slug": "sheehan-syndrome", "video_id": "1exN1kFX2wI", "youtube_id": "1exN1kFX2wI", "readable_id": "sheehan-syndrome"}, "SfbjqVyQljk": {"duration": 71, "path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/adding-complex-numbers/", "keywords": "u16_l4_t2_we1, Adding, Complex, Numbers", "id": "SfbjqVyQljk", "title": "Adding complex numbers", "description": "Adding Complex Numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SfbjqVyQljk.mp4/SfbjqVyQljk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SfbjqVyQljk.mp4/SfbjqVyQljk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SfbjqVyQljk.m3u8/SfbjqVyQljk.m3u8"}, "slug": "adding-complex-numbers", "video_id": "SfbjqVyQljk", "youtube_id": "SfbjqVyQljk", "readable_id": "adding-complex-numbers"}, "CZdziIlYIfI": {"duration": 943, "path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/periodic-definite-integral/", "keywords": "2010, IIT, JEE, Paper, Problem, 52, Periodic, Definite, Integral, integration, by, parts", "id": "CZdziIlYIfI", "title": "Challenging definite integration", "description": "2010 IIT JEE Paper 1 Problem 52 Periodic Definite Integral. The second term at about minute 14 should have a positive sign. Luckily, it doesn't effect the final answer!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CZdziIlYIfI.mp4/CZdziIlYIfI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CZdziIlYIfI.mp4/CZdziIlYIfI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CZdziIlYIfI.m3u8/CZdziIlYIfI.m3u8"}, "slug": "periodic-definite-integral", "video_id": "CZdziIlYIfI", "youtube_id": "CZdziIlYIfI", "readable_id": "periodic-definite-integral"}, "heKK95DAKms": {"duration": 265, "path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-snakes-graphs/", "keywords": "math, doodles, mathematics, doodling, school, stars, graph theory, borromean rings, ouroboros, snakes, dark mark, topology, knot theory", "id": "heKK95DAKms", "title": "Doodling in math: Snakes and graphs", "description": "More videos/info: http://vihart.com/doodlingDoodling Stars: http://www.youtube.com/watch?v=CfJzrmS9UfYDoodling Binary Trees: http://www.youtube.com/watch?v=e4MSN6IImpIhttp://vihart.com", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/heKK95DAKms.mp4/heKK95DAKms.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/heKK95DAKms.mp4/heKK95DAKms.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/heKK95DAKms.m3u8/heKK95DAKms.m3u8"}, "slug": "doodling-in-math-class-snakes-graphs", "video_id": "heKK95DAKms", "youtube_id": "heKK95DAKms", "readable_id": "doodling-in-math-class-snakes-graphs"}, "1kbZ1JAoi5o": {"duration": 262, "path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/animal-communication/", "keywords": "", "id": "1kbZ1JAoi5o", "title": "Animal communication", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1kbZ1JAoi5o.mp4/1kbZ1JAoi5o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1kbZ1JAoi5o.mp4/1kbZ1JAoi5o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1kbZ1JAoi5o.m3u8/1kbZ1JAoi5o.m3u8"}, "slug": "animal-communication", "video_id": "1kbZ1JAoi5o", "youtube_id": "1kbZ1JAoi5o", "readable_id": "animal-communication"}, "On3c86V5A_E": {"duration": 509, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-7-giving-out-loans-without-giving-out-gold/", "keywords": "banking, loans, finance, economics", "id": "On3c86V5A_E", "title": "Banking 7: Giving out loans without giving out gold", "description": "How banks can give out loans without ever giving out gold.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/On3c86V5A_E.mp4/On3c86V5A_E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/On3c86V5A_E.mp4/On3c86V5A_E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/On3c86V5A_E.m3u8/On3c86V5A_E.m3u8"}, "slug": "banking-7-giving-out-loans-without-giving-out-gold", "video_id": "On3c86V5A_E", "youtube_id": "On3c86V5A_E", "readable_id": "banking-7-giving-out-loans-without-giving-out-gold"}, "LOiw5aBrm4Y": {"duration": 632, "path": "khan/humanities/history/american-civics/american-civics/government-s-financial-condition/", "keywords": "finance, economics, budget, deficit, debt", "id": "LOiw5aBrm4Y", "title": "Government's financial condition", "description": "Difference between debt and operating costs. Seeing how large obligations are for social security and medicare", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LOiw5aBrm4Y.mp4/LOiw5aBrm4Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LOiw5aBrm4Y.mp4/LOiw5aBrm4Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LOiw5aBrm4Y.m3u8/LOiw5aBrm4Y.m3u8"}, "slug": "government-s-financial-condition", "video_id": "LOiw5aBrm4Y", "youtube_id": "LOiw5aBrm4Y", "readable_id": "government-s-financial-condition"}, "mFJ9tHJA2Sw": {"duration": 732, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/william-hogarth-s-marriage-a-la-mode-c-1743/", "keywords": "Hogarth, prints, engraving, painting, English, satire", "id": "mFJ9tHJA2Sw", "title": "William Hogarth, Marriage A-la-Mode (including T\u00eate \u00e0 T\u00eate)", "description": "William Hogarth, Marriage A-la-Mode, c. 1743, oil on canvas, 69.9 x 90.8 cm (The National Gallery, London)\n1. The Marriage Settlement\n2. The T\u00eate \u00e0 T\u00eate\n3, The Inspection\n4. The Toilette\n5. The Bagnio\n6. The Lady's Death\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mFJ9tHJA2Sw.mp4/mFJ9tHJA2Sw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mFJ9tHJA2Sw.mp4/mFJ9tHJA2Sw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mFJ9tHJA2Sw.m3u8/mFJ9tHJA2Sw.m3u8"}, "slug": "william-hogarth-s-marriage-a-la-mode-c-1743", "video_id": "mFJ9tHJA2Sw", "youtube_id": "mFJ9tHJA2Sw", "readable_id": "william-hogarth-s-marriage-a-la-mode-c-1743"}, "wl2iQAuQl7Y": {"duration": 156, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/comparing_linear_functions/comparing-features-of-functions-3/", "keywords": "", "id": "wl2iQAuQl7Y", "title": "Comparing linear functions 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wl2iQAuQl7Y.mp4/wl2iQAuQl7Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wl2iQAuQl7Y.mp4/wl2iQAuQl7Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wl2iQAuQl7Y.m3u8/wl2iQAuQl7Y.m3u8"}, "slug": "comparing-features-of-functions-3", "video_id": "wl2iQAuQl7Y", "youtube_id": "wl2iQAuQl7Y", "readable_id": "comparing-features-of-functions-3"}, "4lbVBMLZ1jQ": {"duration": 613, "path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/physical-properties-of-aldehydes-and-ketones/", "keywords": "", "id": "4lbVBMLZ1jQ", "title": "Physical properties of aldehydes and ketones", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4lbVBMLZ1jQ.mp4/4lbVBMLZ1jQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4lbVBMLZ1jQ.mp4/4lbVBMLZ1jQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4lbVBMLZ1jQ.m3u8/4lbVBMLZ1jQ.m3u8"}, "slug": "physical-properties-of-aldehydes-and-ketones", "video_id": "4lbVBMLZ1jQ", "youtube_id": "4lbVBMLZ1jQ", "readable_id": "physical-properties-of-aldehydes-and-ketones"}, "TDpQ5xL1EEE": {"duration": 150, "path": "khan/science/discoveries-projects/robots/spider_bot/4-attach-spider-s-click-n-stick-base-to-the-batteries/", "keywords": "", "id": "TDpQ5xL1EEE", "title": "Click n' stick base & batteries", "description": "In this video we show you how to connect Spider's motors to his tap light base.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TDpQ5xL1EEE.mp4/TDpQ5xL1EEE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TDpQ5xL1EEE.mp4/TDpQ5xL1EEE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TDpQ5xL1EEE.m3u8/TDpQ5xL1EEE.m3u8"}, "slug": "4-attach-spider-s-click-n-stick-base-to-the-batteries", "video_id": "TDpQ5xL1EEE", "youtube_id": "TDpQ5xL1EEE", "readable_id": "4-attach-spider-s-click-n-stick-base-to-the-batteries"}, "AsqEkF7hcII": {"duration": 584, "path": "khan/test-prep/mcat/physical-processes/stoichiometry/the-mole-and-avogadro-s-number/", "keywords": "mole, chemistry, avogadro's, number", "id": "AsqEkF7hcII", "title": "The mole and Avogadro's number", "description": "Introduction to the idea of a mole as a number (vs. an animal).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AsqEkF7hcII.mp4/AsqEkF7hcII.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AsqEkF7hcII.mp4/AsqEkF7hcII.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AsqEkF7hcII.m3u8/AsqEkF7hcII.m3u8"}, "slug": "the-mole-and-avogadro-s-number", "video_id": "AsqEkF7hcII", "youtube_id": "AsqEkF7hcII", "readable_id": "the-mole-and-avogadro-s-number"}, "KRFiAlo7t1E": {"duration": 498, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/explicit-and-recursive-definitions-of-sequences/", "keywords": "", "id": "KRFiAlo7t1E", "title": "Introduction to sequences", "description": "Sal explains what sequences are and gives examples of different sequences, defined either explicitly or recursively, and discusses different notations for sequences.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KRFiAlo7t1E.mp4/KRFiAlo7t1E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KRFiAlo7t1E.mp4/KRFiAlo7t1E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KRFiAlo7t1E.m3u8/KRFiAlo7t1E.m3u8"}, "slug": "explicit-and-recursive-definitions-of-sequences", "video_id": "KRFiAlo7t1E", "youtube_id": "KRFiAlo7t1E", "readable_id": "explicit-and-recursive-definitions-of-sequences"}, "gZMvA2Apg2A": {"duration": 217, "path": "khan/test-prep/mcat/individuals-and-society/social-interactions/social-support/", "keywords": "", "id": "gZMvA2Apg2A", "title": "Social support", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gZMvA2Apg2A.mp4/gZMvA2Apg2A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gZMvA2Apg2A.mp4/gZMvA2Apg2A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gZMvA2Apg2A.m3u8/gZMvA2Apg2A.m3u8"}, "slug": "social-support", "video_id": "gZMvA2Apg2A", "youtube_id": "gZMvA2Apg2A", "readable_id": "social-support"}, "gcnk8TnzsLc": {"duration": 250, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions/multiplying-and-dividing-rational-expressions-3/", "keywords": "U11_L1_T2_we3.1, Multiplying, and, Dividing, Rational, Expressions, CC_39336_A-APR_6, CC_39336_A-APR_7", "id": "gcnk8TnzsLc", "title": "How to divide rational expressions with polynomial numerators and denominators (example)", "description": "Sal performs the following division and simplifies the result: (2p+6)/(p+5) \u2797 (10)/(4p+20).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gcnk8TnzsLc.mp4/gcnk8TnzsLc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gcnk8TnzsLc.mp4/gcnk8TnzsLc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gcnk8TnzsLc.m3u8/gcnk8TnzsLc.m3u8"}, "slug": "multiplying-and-dividing-rational-expressions-3", "video_id": "gcnk8TnzsLc", "youtube_id": "gcnk8TnzsLc", "readable_id": "multiplying-and-dividing-rational-expressions-3"}, "Kuqm8Y3tUxY": {"duration": 234, "path": "khan/partner-content/pixar/rendering/rendering1/rendering-2/", "keywords": "", "id": "Kuqm8Y3tUxY", "title": "2. Light reflection", "description": "Let's look more closely at how light behaves when it strikes an object. We'll cover diffuse and specular surface responses.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Kuqm8Y3tUxY.mp4/Kuqm8Y3tUxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Kuqm8Y3tUxY.mp4/Kuqm8Y3tUxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Kuqm8Y3tUxY.m3u8/Kuqm8Y3tUxY.m3u8"}, "slug": "rendering-2", "video_id": "Kuqm8Y3tUxY", "youtube_id": "Kuqm8Y3tUxY", "readable_id": "rendering-2"}, "_y_Q3_B2Vh8": {"duration": 312, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/why-of-algebra/why-we-do-the-same-thing-to-both-sides-two-step-equations/", "keywords": "Why, we, do, the, same, thing, to, both, sides, two, step, equations", "id": "_y_Q3_B2Vh8", "title": "Solving two-step equations", "description": "Here's how we solve a two step equation. It begins with the concept of equality: what we do to one side of the equation must be done to the other.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_y_Q3_B2Vh8.mp4/_y_Q3_B2Vh8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_y_Q3_B2Vh8.mp4/_y_Q3_B2Vh8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_y_Q3_B2Vh8.m3u8/_y_Q3_B2Vh8.m3u8"}, "slug": "why-we-do-the-same-thing-to-both-sides-two-step-equations", "video_id": "_y_Q3_B2Vh8", "youtube_id": "_y_Q3_B2Vh8", "readable_id": "why-we-do-the-same-thing-to-both-sides-two-step-equations"}, "j7WcgW4BpqE": {"duration": 182, "path": "khan/partner-content/big-history-project/what-is-big-history/other-materials1/one-student-of-big-history/", "keywords": "", "id": "j7WcgW4BpqE", "title": "One Student of Big History", "description": "Did you know Bill Gates was a big history student? Here he explains why it's his favorite course of all time.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j7WcgW4BpqE.mp4/j7WcgW4BpqE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j7WcgW4BpqE.mp4/j7WcgW4BpqE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j7WcgW4BpqE.m3u8/j7WcgW4BpqE.m3u8"}, "slug": "one-student-of-big-history", "video_id": "j7WcgW4BpqE", "youtube_id": "j7WcgW4BpqE", "readable_id": "one-student-of-big-history"}, "6xEO4BeawzA": {"duration": 627, "path": "khan/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation/complex-roots-of-the-characteristic-equations-1/", "keywords": "Complex, roots, of, the, characteristic, equations", "id": "6xEO4BeawzA", "title": "Complex roots of the characteristic equations 1", "description": "What happens when the characteristic equations has complex roots?!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6xEO4BeawzA.mp4/6xEO4BeawzA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6xEO4BeawzA.mp4/6xEO4BeawzA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6xEO4BeawzA.m3u8/6xEO4BeawzA.m3u8"}, "slug": "complex-roots-of-the-characteristic-equations-1", "video_id": "6xEO4BeawzA", "youtube_id": "6xEO4BeawzA", "readable_id": "complex-roots-of-the-characteristic-equations-1"}, "A-Q79HlORtM": {"duration": 218, "path": "khan/humanities/ancient-art-civilizations/greek-art/early-classical/charioteer-delphi/", "keywords": "", "id": "A-Q79HlORtM", "title": "Charioteer of Delphi", "description": "Charioteer of Delphi, c. 478-474 B.C.E., bronze (lost wax cast) with silver, glass and copper inlay, 1.8 m high (Delphi Archaeological Museum)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nInscription on base:\n\"Dedicated by Polyzalus, younger brother of Gelon, tyrant of Gela and later of Syracuse, and of Hieron\"\n\nUncovered in 1896 near the Temple of Apollo at Delphi", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A-Q79HlORtM.mp4/A-Q79HlORtM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A-Q79HlORtM.mp4/A-Q79HlORtM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A-Q79HlORtM.m3u8/A-Q79HlORtM.m3u8"}, "slug": "charioteer-delphi", "video_id": "A-Q79HlORtM", "youtube_id": "A-Q79HlORtM", "readable_id": "charioteer-delphi"}, "15fz6Wo84IA": {"duration": 443, "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/proton-nmr-practice-3/", "keywords": "", "id": "15fz6Wo84IA", "title": "Proton NMR practice 3", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/15fz6Wo84IA.mp4/15fz6Wo84IA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/15fz6Wo84IA.mp4/15fz6Wo84IA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/15fz6Wo84IA.m3u8/15fz6Wo84IA.m3u8"}, "slug": "proton-nmr-practice-3", "video_id": "15fz6Wo84IA", "youtube_id": "15fz6Wo84IA", "readable_id": "proton-nmr-practice-3"}, "VOzV4d0HKis": {"duration": 257, "path": "khan/science/biology/membranes-and-transport/bulk-transport/exocytosis/", "keywords": "education,online learning,learning,lessons,exocytosis", "id": "VOzV4d0HKis", "title": "Exocytosis", "description": "Introduction to exocytosis!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VOzV4d0HKis.mp4/VOzV4d0HKis.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VOzV4d0HKis.mp4/VOzV4d0HKis.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VOzV4d0HKis.m3u8/VOzV4d0HKis.m3u8"}, "slug": "exocytosis", "video_id": "VOzV4d0HKis", "youtube_id": "VOzV4d0HKis", "readable_id": "exocytosis"}, "QW5zeVy8aE0": {"duration": 220, "path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/tour-of-the-ems-06-ultraviolet-waves/", "keywords": "", "id": "QW5zeVy8aE0", "title": "Ultraviolet waves (1801)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QW5zeVy8aE0.mp4/QW5zeVy8aE0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QW5zeVy8aE0.mp4/QW5zeVy8aE0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QW5zeVy8aE0.m3u8/QW5zeVy8aE0.m3u8"}, "slug": "tour-of-the-ems-06-ultraviolet-waves", "video_id": "QW5zeVy8aE0", "youtube_id": "QW5zeVy8aE0", "readable_id": "tour-of-the-ems-06-ultraviolet-waves"}, "zVsGtU8lIWs": {"duration": 323, "path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/preimage-of-a-set/", "keywords": "preimage, image, of, set", "id": "zVsGtU8lIWs", "title": "Preimage of a set", "description": "Definition of preimage of a set", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zVsGtU8lIWs.mp4/zVsGtU8lIWs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zVsGtU8lIWs.mp4/zVsGtU8lIWs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zVsGtU8lIWs.m3u8/zVsGtU8lIWs.m3u8"}, "slug": "preimage-of-a-set", "video_id": "zVsGtU8lIWs", "youtube_id": "zVsGtU8lIWs", "readable_id": "preimage-of-a-set"}, "Ybw6N0dQIaE": {"duration": 178, "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software/sscc-blended-buildsoftware/", "keywords": "", "id": "Ybw6N0dQIaE", "title": "Building customized software and solutions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ybw6N0dQIaE.mp4/Ybw6N0dQIaE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ybw6N0dQIaE.mp4/Ybw6N0dQIaE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ybw6N0dQIaE.m3u8/Ybw6N0dQIaE.m3u8"}, "slug": "sscc-blended-buildsoftware", "video_id": "Ybw6N0dQIaE", "youtube_id": "Ybw6N0dQIaE", "readable_id": "sscc-blended-buildsoftware"}, "oeyCaB_sj-0": {"duration": 228, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/cyanotic-heart-diseases-diagnosis-and-treatment/", "keywords": "", "id": "oeyCaB_sj-0", "title": "Cyanotic heart diseases - Diagnosis and treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oeyCaB_sj-0.mp4/oeyCaB_sj-0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oeyCaB_sj-0.mp4/oeyCaB_sj-0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oeyCaB_sj-0.m3u8/oeyCaB_sj-0.m3u8"}, "slug": "cyanotic-heart-diseases-diagnosis-and-treatment", "video_id": "oeyCaB_sj-0", "youtube_id": "oeyCaB_sj-0", "readable_id": "cyanotic-heart-diseases-diagnosis-and-treatment"}, "YWE9HuV0lo8": {"duration": 319, "path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/bottlenecks-the-environment/", "keywords": "", "id": "YWE9HuV0lo8", "title": "Bottlenecks and the environment", "description": "Learn about how changes in the environment can change the way natural selection behaves. What happens when a population's environment changes drastically?\u00a0 By Ross Firestone.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YWE9HuV0lo8.mp4/YWE9HuV0lo8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YWE9HuV0lo8.mp4/YWE9HuV0lo8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YWE9HuV0lo8.m3u8/YWE9HuV0lo8.m3u8"}, "slug": "bottlenecks-the-environment", "video_id": "YWE9HuV0lo8", "youtube_id": "YWE9HuV0lo8", "readable_id": "bottlenecks-the-environment"}, "8T4F7WboWPQ": {"duration": 327, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/binary-to-hexadecimal/", "keywords": "", "id": "8T4F7WboWPQ", "title": "Converting directly from binary to hexadecimal", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8T4F7WboWPQ.mp4/8T4F7WboWPQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8T4F7WboWPQ.mp4/8T4F7WboWPQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8T4F7WboWPQ.m3u8/8T4F7WboWPQ.m3u8"}, "slug": "binary-to-hexadecimal", "video_id": "8T4F7WboWPQ", "youtube_id": "8T4F7WboWPQ", "readable_id": "binary-to-hexadecimal"}, "l4hMDy_JMEQ": {"duration": 118, "path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/hotspot-case-study-mesoamerica/", "keywords": "", "id": "l4hMDy_JMEQ", "title": "Biodiversity hotspot case study: Mesoamerica", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/l4hMDy_JMEQ.mp4/l4hMDy_JMEQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/l4hMDy_JMEQ.mp4/l4hMDy_JMEQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/l4hMDy_JMEQ.m3u8/l4hMDy_JMEQ.m3u8"}, "slug": "hotspot-case-study-mesoamerica", "video_id": "l4hMDy_JMEQ", "youtube_id": "l4hMDy_JMEQ", "readable_id": "hotspot-case-study-mesoamerica"}, "og9baLjHRH4": {"duration": 778, "path": "khan/partner-content/big-history-project/life/life-and-big-history/bhp-origin-of-life_crashcourse/", "keywords": "", "id": "og9baLjHRH4", "title": "Crash Course Big History: The Origin of Life", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/og9baLjHRH4.mp4/og9baLjHRH4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/og9baLjHRH4.mp4/og9baLjHRH4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/og9baLjHRH4.m3u8/og9baLjHRH4.m3u8"}, "slug": "bhp-origin-of-life_crashcourse", "video_id": "og9baLjHRH4", "youtube_id": "og9baLjHRH4", "readable_id": "bhp-origin-of-life_crashcourse"}, "gpIJcqY0weE": {"duration": 579, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-11/", "keywords": "gmat, data, sufficiency", "id": "gpIJcqY0weE", "title": "GMAT: Data sufficiency 11", "description": "51-54, pgs. 281-282", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gpIJcqY0weE.mp4/gpIJcqY0weE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gpIJcqY0weE.mp4/gpIJcqY0weE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gpIJcqY0weE.m3u8/gpIJcqY0weE.m3u8"}, "slug": "gmat-data-sufficiency-11", "video_id": "gpIJcqY0weE", "youtube_id": "gpIJcqY0weE", "readable_id": "gmat-data-sufficiency-11"}, "5lXw5_4R2B4": {"duration": 203, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/adding-up-resistance-problem/", "keywords": "", "id": "5lXw5_4R2B4", "title": "Adding up resistance problem", "description": "Here's a chance to see if you can combine what you know to add up resistance in series AND in parallel. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5lXw5_4R2B4.mp4/5lXw5_4R2B4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5lXw5_4R2B4.mp4/5lXw5_4R2B4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5lXw5_4R2B4.m3u8/5lXw5_4R2B4.m3u8"}, "slug": "adding-up-resistance-problem", "video_id": "5lXw5_4R2B4", "youtube_id": "5lXw5_4R2B4", "readable_id": "adding-up-resistance-problem"}, "oKRly5xc0_g": {"duration": 185, "path": "khan/humanities/global-culture/conceptual-performance/hans-haacke/", "keywords": "Tate", "id": "oKRly5xc0_g", "title": "Hans Haacke: \"A Breed Apart\" in South Africa", "description": "This video brought to you by Tate.org.uk\n\nSince the early 1960s, German-American artist Hans Haacke has been producing controversial work, often seeking to expose systems of power and influence. While some artists might work to engage with local concerns, Haacke brings his art and its topics to a global scale. In this video, he explains his 1978 photographic series A Breed Apart, a group of montages which targets former car manufacturer British Leyland and for its insidious campaigns and actions in apartheid\u2014or racially segregated\u2014South Africa. By juxtaposing slick advertising shots with images of Leyland vehicles \u201cin action,\u201d as he puts it, against the black indigenous population of South Africa, Haacke highlighted the incongruities of the company\u2019s stance.\n\n\n\n\n\n\u201cI believe it is necessary for the public... the voters... to become aware of these interdependencies, and come up with, hopefully, an alternative,\u201d says Haacke. Do you think art and artists have a responsibility to inform and activate the public?\n\nLearn more about Hans Haacke and his politically engaged works of art here.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oKRly5xc0_g.mp4/oKRly5xc0_g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oKRly5xc0_g.mp4/oKRly5xc0_g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oKRly5xc0_g.m3u8/oKRly5xc0_g.m3u8"}, "slug": "hans-haacke", "video_id": "oKRly5xc0_g", "youtube_id": "oKRly5xc0_g", "readable_id": "hans-haacke"}, "Uteoh0PtWwI": {"duration": 222, "path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/radical-function-graphs-exercise/", "keywords": "", "id": "Uteoh0PtWwI", "title": "Matching radical functions with graphs exercise example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Uteoh0PtWwI.mp4/Uteoh0PtWwI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Uteoh0PtWwI.mp4/Uteoh0PtWwI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Uteoh0PtWwI.m3u8/Uteoh0PtWwI.m3u8"}, "slug": "radical-function-graphs-exercise", "video_id": "Uteoh0PtWwI", "youtube_id": "Uteoh0PtWwI", "readable_id": "radical-function-graphs-exercise"}, "5YfO4CshL7Y": {"duration": 394, "path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/short-sale-basics/", "keywords": "", "id": "5YfO4CshL7Y", "title": "Short sale basics", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5YfO4CshL7Y.mp4/5YfO4CshL7Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5YfO4CshL7Y.mp4/5YfO4CshL7Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5YfO4CshL7Y.m3u8/5YfO4CshL7Y.m3u8"}, "slug": "short-sale-basics", "video_id": "5YfO4CshL7Y", "youtube_id": "5YfO4CshL7Y", "readable_id": "short-sale-basics"}, "mfRafWtmOcU": {"duration": 268, "path": "khan/partner-content/big-history-project/solar-system-and-earth/plate-tectonics-important/bhp-our-shifting-world/", "keywords": "", "id": "mfRafWtmOcU", "title": "Our Shifting Globe", "description": "Every volcanic eruption and earthquakes are a reminder that Earth is very much alive and in motion.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mfRafWtmOcU.mp4/mfRafWtmOcU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mfRafWtmOcU.mp4/mfRafWtmOcU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mfRafWtmOcU.m3u8/mfRafWtmOcU.m3u8"}, "slug": "bhp-our-shifting-world", "video_id": "mfRafWtmOcU", "youtube_id": "mfRafWtmOcU", "readable_id": "bhp-our-shifting-world"}, "FJIZPvE3O1A": {"duration": 606, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-circle-area-chords-tangent/", "keywords": "geometry, circle", "id": "FJIZPvE3O1A", "title": "CA Geometry: Circle area chords tangent", "description": "71-75, area, chords, tangents of circles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FJIZPvE3O1A.mp4/FJIZPvE3O1A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FJIZPvE3O1A.mp4/FJIZPvE3O1A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FJIZPvE3O1A.m3u8/FJIZPvE3O1A.m3u8"}, "slug": "ca-geometry-circle-area-chords-tangent", "video_id": "FJIZPvE3O1A", "youtube_id": "FJIZPvE3O1A", "readable_id": "ca-geometry-circle-area-chords-tangent"}, "V3FvaClh6LY": {"duration": 85, "path": "khan/math/pre-algebra/rates-and-ratios/ratios_and_proportions/understanding-proportions/", "keywords": "U04_L2_T1_we1, Understanding, Proportions, CC_7_RP_2, CC_7_RP_2_a", "id": "V3FvaClh6LY", "title": "Proportion validity example", "description": "Understanding Proportions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/V3FvaClh6LY.mp4/V3FvaClh6LY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/V3FvaClh6LY.mp4/V3FvaClh6LY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/V3FvaClh6LY.m3u8/V3FvaClh6LY.m3u8"}, "slug": "understanding-proportions", "video_id": "V3FvaClh6LY", "youtube_id": "V3FvaClh6LY", "readable_id": "understanding-proportions"}, "Zn-GbH2S0Dk": {"duration": 403, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/old-school-equations/algebra-linear-equations-3/", "keywords": "algebra", "id": "Zn-GbH2S0Dk", "title": "Algebra: Linear equations 3", "description": "Linear equations with multiple variable and constant terms", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zn-GbH2S0Dk.mp4/Zn-GbH2S0Dk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zn-GbH2S0Dk.mp4/Zn-GbH2S0Dk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zn-GbH2S0Dk.m3u8/Zn-GbH2S0Dk.m3u8"}, "slug": "algebra-linear-equations-3", "video_id": "Zn-GbH2S0Dk", "youtube_id": "Zn-GbH2S0Dk", "readable_id": "algebra-linear-equations-3"}, "g_dStt4st2I": {"duration": 335, "path": "khan/math/geometry/geometric-constructions/constructing-tangents/another-example-using-compass-and-straightedge-for-tangent-line/", "keywords": "", "id": "g_dStt4st2I", "title": "Another example using compass and straightedge for tangent line", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g_dStt4st2I.mp4/g_dStt4st2I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g_dStt4st2I.mp4/g_dStt4st2I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g_dStt4st2I.m3u8/g_dStt4st2I.m3u8"}, "slug": "another-example-using-compass-and-straightedge-for-tangent-line", "video_id": "g_dStt4st2I", "youtube_id": "g_dStt4st2I", "readable_id": "another-example-using-compass-and-straightedge-for-tangent-line"}, "VRNDGeq_hlE": {"duration": 127, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/pronoun-clarity-basic/", "keywords": "education,online learning,learning,lessons", "id": "VRNDGeq_hlE", "title": "Writing: Pronoun clarity \u2014 Basic example", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0pronoun clarity.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VRNDGeq_hlE.mp4/VRNDGeq_hlE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VRNDGeq_hlE.mp4/VRNDGeq_hlE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VRNDGeq_hlE.m3u8/VRNDGeq_hlE.m3u8"}, "slug": "pronoun-clarity-basic", "video_id": "VRNDGeq_hlE", "youtube_id": "VRNDGeq_hlE", "readable_id": "pronoun-clarity-basic"}, "AwulrWkLy3Q": {"duration": 221, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2008-may-4-17/", "keywords": "", "id": "AwulrWkLy3Q", "title": "17 Intersection of perpendicular lines", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AwulrWkLy3Q.mp4/AwulrWkLy3Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AwulrWkLy3Q.mp4/AwulrWkLy3Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AwulrWkLy3Q.m3u8/AwulrWkLy3Q.m3u8"}, "slug": "sat-2008-may-4-17", "video_id": "AwulrWkLy3Q", "youtube_id": "AwulrWkLy3Q", "readable_id": "sat-2008-may-4-17"}, "78tnNYNISOc": {"duration": 420, "path": "khan/math/differential-calculus/limits_topic/limits-infinity/vertical-asymptote-natural-log/", "keywords": "", "id": "78tnNYNISOc", "title": "Vertical asymptote of natural log", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/78tnNYNISOc.mp4/78tnNYNISOc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/78tnNYNISOc.mp4/78tnNYNISOc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/78tnNYNISOc.m3u8/78tnNYNISOc.m3u8"}, "slug": "vertical-asymptote-natural-log", "video_id": "78tnNYNISOc", "youtube_id": "78tnNYNISOc", "readable_id": "vertical-asymptote-natural-log"}, "8EmhGOQ-DNQ": {"duration": 244, "path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/snowflakes-starflakes-and-swirlflakes/", "keywords": "", "id": "8EmhGOQ-DNQ", "title": "Snowflakes, starflakes, and swirlflakes", "description": "Unusual variations on the paper snowflake.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8EmhGOQ-DNQ.mp4/8EmhGOQ-DNQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8EmhGOQ-DNQ.mp4/8EmhGOQ-DNQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8EmhGOQ-DNQ.m3u8/8EmhGOQ-DNQ.m3u8"}, "slug": "snowflakes-starflakes-and-swirlflakes", "video_id": "8EmhGOQ-DNQ", "youtube_id": "8EmhGOQ-DNQ", "readable_id": "snowflakes-starflakes-and-swirlflakes"}, "MzY6PTY0Bks": {"duration": 174, "path": "khan/math/recreational-math/math-warmup/arithmetic-warmups/addition-warmup/", "keywords": "", "id": "MzY6PTY0Bks", "title": "Addition with carrying warmup", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MzY6PTY0Bks.mp4/MzY6PTY0Bks.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MzY6PTY0Bks.mp4/MzY6PTY0Bks.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MzY6PTY0Bks.m3u8/MzY6PTY0Bks.m3u8"}, "slug": "addition-warmup", "video_id": "MzY6PTY0Bks", "youtube_id": "MzY6PTY0Bks", "readable_id": "addition-warmup"}, "wwjtuZ5vTvc": {"duration": 581, "path": "khan/science/physics/fluids/buoyant-force-and-archimedes-principle/fluids-part-6/", "keywords": "physics, fluid, liquid, archimedes, buoyant, force, example", "id": "wwjtuZ5vTvc", "title": "Buoyant force example problems", "description": "A couple of problems involving Archimedes' principle and buoyant forces.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wwjtuZ5vTvc.mp4/wwjtuZ5vTvc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wwjtuZ5vTvc.mp4/wwjtuZ5vTvc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wwjtuZ5vTvc.m3u8/wwjtuZ5vTvc.m3u8"}, "slug": "fluids-part-6", "video_id": "wwjtuZ5vTvc", "youtube_id": "wwjtuZ5vTvc", "readable_id": "fluids-part-6"}, "wPZIa3SjPF0": {"duration": 169, "path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/quadrilateral-types-exercise/", "keywords": "", "id": "wPZIa3SjPF0", "title": "Quadrilaterals: find the type exercise", "description": "Take a look at the given data and determine what type of quadrilateral we have.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wPZIa3SjPF0.mp4/wPZIa3SjPF0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wPZIa3SjPF0.mp4/wPZIa3SjPF0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wPZIa3SjPF0.m3u8/wPZIa3SjPF0.m3u8"}, "slug": "quadrilateral-types-exercise", "video_id": "wPZIa3SjPF0", "youtube_id": "wPZIa3SjPF0", "readable_id": "quadrilateral-types-exercise"}, "3tyrkxruz88": {"duration": 788, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/electron-configurations-for-the-third-and-fourth-periods/", "keywords": "", "id": "3tyrkxruz88", "title": "Electron configurations for the third and fourth periods", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3tyrkxruz88.mp4/3tyrkxruz88.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3tyrkxruz88.mp4/3tyrkxruz88.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3tyrkxruz88.m3u8/3tyrkxruz88.m3u8"}, "slug": "electron-configurations-for-the-third-and-fourth-periods", "video_id": "3tyrkxruz88", "youtube_id": "3tyrkxruz88", "readable_id": "electron-configurations-for-the-third-and-fourth-periods"}, "8ToCxaB7EOE": {"duration": 317, "path": "khan/math/basic-geo/basic-geo-coordinate-plane/basic-geo-shapes-on-a-plane/analyzing-polygon-on-the-coordinate-plane/", "keywords": "", "id": "8ToCxaB7EOE", "title": "Parallelogram on the coordinate plane", "description": "Remember our discussion of the coordinate plane? Sure you do! Let's graph the given coordinates of three of the polygon vertices, and find where the 4th vertex is.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8ToCxaB7EOE.mp4/8ToCxaB7EOE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8ToCxaB7EOE.mp4/8ToCxaB7EOE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8ToCxaB7EOE.m3u8/8ToCxaB7EOE.m3u8"}, "slug": "analyzing-polygon-on-the-coordinate-plane", "video_id": "8ToCxaB7EOE", "youtube_id": "8ToCxaB7EOE", "readable_id": "analyzing-polygon-on-the-coordinate-plane"}, "L-_MvjcH0xk": {"duration": 762, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/anatomy-of-a-muscle-cell-1/", "keywords": "", "id": "L-_MvjcH0xk", "title": "Anatomy of a muscle cell", "description": "Understanding the structure of a muscle cell. By Raja Narayan.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L-_MvjcH0xk.mp4/L-_MvjcH0xk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L-_MvjcH0xk.mp4/L-_MvjcH0xk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L-_MvjcH0xk.m3u8/L-_MvjcH0xk.m3u8"}, "slug": "anatomy-of-a-muscle-cell-1", "video_id": "L-_MvjcH0xk", "youtube_id": "L-_MvjcH0xk", "readable_id": "anatomy-of-a-muscle-cell-1"}, "6WMZ7J0wwMI": {"duration": 461, "path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/exponential-growth-functions/", "keywords": "Exponential, Growth, Functions, CC_39336_F-IF_8_b, CC_39336_F-LE_1_c", "id": "6WMZ7J0wwMI", "title": "Introduction to exponential functions", "description": "Sal introduces and defines exponential functions using the example y = 3^x and graphing it. He also solves an exponential word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6WMZ7J0wwMI.mp4/6WMZ7J0wwMI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6WMZ7J0wwMI.mp4/6WMZ7J0wwMI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6WMZ7J0wwMI.m3u8/6WMZ7J0wwMI.m3u8"}, "slug": "exponential-growth-functions", "video_id": "6WMZ7J0wwMI", "youtube_id": "6WMZ7J0wwMI", "readable_id": "exponential-growth-functions"}, "QVHuSq_793A": {"duration": 91, "path": "khan/partner-content/pixar/crowds/crowds2/combinatorics6/", "keywords": "", "id": "QVHuSq_793A", "title": "1. Two headed robots", "description": "What happens if the director changes their mind and ask for two headed robots?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QVHuSq_793A.mp4/QVHuSq_793A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QVHuSq_793A.mp4/QVHuSq_793A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QVHuSq_793A.m3u8/QVHuSq_793A.m3u8"}, "slug": "combinatorics6", "video_id": "QVHuSq_793A", "youtube_id": "QVHuSq_793A", "readable_id": "combinatorics6"}, "z_QeYCg4yJ8": {"duration": 493, "path": "khan/humanities/history/american-civics/american-civics/primaries-and-caucuses/", "keywords": "primary, caucus, politics", "id": "z_QeYCg4yJ8", "title": "Primaries and caucuses", "description": "How states choose their delegates for the national party conventions (video content under CC-BY-SA license)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z_QeYCg4yJ8.mp4/z_QeYCg4yJ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z_QeYCg4yJ8.mp4/z_QeYCg4yJ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z_QeYCg4yJ8.m3u8/z_QeYCg4yJ8.m3u8"}, "slug": "primaries-and-caucuses", "video_id": "z_QeYCg4yJ8", "youtube_id": "z_QeYCg4yJ8", "readable_id": "primaries-and-caucuses"}, "yT-BpKlHMps": {"duration": 278, "path": "khan/test-prep/mcat/behavior/social-psychology/social-facilitation-and-social-loafing/", "keywords": "", "id": "yT-BpKlHMps", "title": "Social facilitation and social loafing", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yT-BpKlHMps.mp4/yT-BpKlHMps.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yT-BpKlHMps.mp4/yT-BpKlHMps.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yT-BpKlHMps.m3u8/yT-BpKlHMps.m3u8"}, "slug": "social-facilitation-and-social-loafing", "video_id": "yT-BpKlHMps", "youtube_id": "yT-BpKlHMps", "readable_id": "social-facilitation-and-social-loafing"}, "CnXuSCaCNBo": {"duration": 737, "path": "khan/science/health-and-medicine/healthcare-misc/bacterial-meningitis/", "keywords": "medicine", "id": "CnXuSCaCNBo", "title": "Bacterial meningitis", "description": "Dr. Charles Prober discusses prudent prescribing of antibiotics in the context of bacterial meningitis with 4th year medical student Morgan Theis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CnXuSCaCNBo.mp4/CnXuSCaCNBo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CnXuSCaCNBo.mp4/CnXuSCaCNBo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CnXuSCaCNBo.m3u8/CnXuSCaCNBo.m3u8"}, "slug": "bacterial-meningitis", "video_id": "CnXuSCaCNBo", "youtube_id": "CnXuSCaCNBo", "readable_id": "bacterial-meningitis"}, "cxs1d3N60UI": {"duration": 181, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-egypt-ap/the-seated-scribe-c-2620-2500-b-c-e/", "keywords": "Seated Scribe, Louvre, smarthistory, art history, ancient egypt, egypt, scribe", "id": "cxs1d3N60UI", "title": "Old Kingdom: Seated Scribe", "description": "The Seated Scribe\u200b, c. 2620-2500 B.C.E., c. 4th Dynasty, Old Kingdom, painted limestone with rock crystal, magnesite, and copper/arsenic inlay for the eyes and wood for the nipples, found in Saqqara (Mus\u00e9e du Louvre, Paris). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cxs1d3N60UI.mp4/cxs1d3N60UI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cxs1d3N60UI.mp4/cxs1d3N60UI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cxs1d3N60UI.m3u8/cxs1d3N60UI.m3u8"}, "slug": "the-seated-scribe-c-2620-2500-b-c-e", "video_id": "cxs1d3N60UI", "youtube_id": "cxs1d3N60UI", "readable_id": "the-seated-scribe-c-2620-2500-b-c-e"}, "T0zpF_j7Mvo": {"duration": 978, "path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/plotting-projectile-displacement-acceleration-and-velocity/", "keywords": "physics, projectile, motion, parabola", "id": "T0zpF_j7Mvo", "title": "Plotting projectile displacement, acceleration, and velocity", "description": "Plotting projectile displacement, acceleration, and velocity as a function to change in time", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T0zpF_j7Mvo.mp4/T0zpF_j7Mvo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T0zpF_j7Mvo.mp4/T0zpF_j7Mvo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T0zpF_j7Mvo.m3u8/T0zpF_j7Mvo.m3u8"}, "slug": "plotting-projectile-displacement-acceleration-and-velocity", "video_id": "T0zpF_j7Mvo", "youtube_id": "T0zpF_j7Mvo", "readable_id": "plotting-projectile-displacement-acceleration-and-velocity"}, "duomXwMSPv8": {"duration": 389, "path": "khan/math/competition-math/amc-10/2013-amc-10-a/2013-amc-10-a-24/", "keywords": "", "id": "duomXwMSPv8", "title": "2013 AMC 10 A #24", "description": "Video by\u00a0Art of Problem Solving. \u00a0Problem from the MAA\u00a0American Mathematics Competitions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/duomXwMSPv8.mp4/duomXwMSPv8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/duomXwMSPv8.mp4/duomXwMSPv8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/duomXwMSPv8.m3u8/duomXwMSPv8.m3u8"}, "slug": "2013-amc-10-a-24", "video_id": "duomXwMSPv8", "youtube_id": "duomXwMSPv8", "readable_id": "2013-amc-10-a-24"}, "9uxvm-USEYE": {"duration": 296, "path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/implicit-derivative-of-x-y-2-x-y-1/", "keywords": "", "id": "9uxvm-USEYE", "title": "Implicit derivative of (x-y)^2 = x + y - 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9uxvm-USEYE.mp4/9uxvm-USEYE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9uxvm-USEYE.mp4/9uxvm-USEYE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9uxvm-USEYE.m3u8/9uxvm-USEYE.m3u8"}, "slug": "implicit-derivative-of-x-y-2-x-y-1", "video_id": "9uxvm-USEYE", "youtube_id": "9uxvm-USEYE", "readable_id": "implicit-derivative-of-x-y-2-x-y-1"}, "rGAIHFB9FL0": {"duration": 525, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/diastolic-heart-failure-pathophysiology/", "keywords": "", "id": "rGAIHFB9FL0", "title": "Diastolic heart failure pathophysiology", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rGAIHFB9FL0.mp4/rGAIHFB9FL0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rGAIHFB9FL0.mp4/rGAIHFB9FL0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rGAIHFB9FL0.m3u8/rGAIHFB9FL0.m3u8"}, "slug": "diastolic-heart-failure-pathophysiology", "video_id": "rGAIHFB9FL0", "youtube_id": "rGAIHFB9FL0", "readable_id": "diastolic-heart-failure-pathophysiology"}, "MeU-KzdCBps": {"duration": 416, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/slope/introduction-to-slope/", "keywords": "", "id": "MeU-KzdCBps", "title": "Introduction to slope", "description": "Introduction to slope", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MeU-KzdCBps.mp4/MeU-KzdCBps.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MeU-KzdCBps.mp4/MeU-KzdCBps.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MeU-KzdCBps.m3u8/MeU-KzdCBps.m3u8"}, "slug": "introduction-to-slope", "video_id": "MeU-KzdCBps", "youtube_id": "MeU-KzdCBps", "readable_id": "introduction-to-slope"}, "i_0DXxNeaQ0": {"duration": 769, "path": "khan/math/recreational-math/vi-hart/singing/what-is-up-with-noises-the-science-and-mathematics-of-sound-frequency-and-pitch/", "keywords": "science, mathematics, sound, pitch, frequency, audio, ears, sound wave, music", "id": "i_0DXxNeaQ0", "title": "What is up with noises? (The science and mathematics of sound, frequency, and pitch)", "description": "Accuracy not guaranteed. Get Audacity and play! http://audacity.sourceforge.net/\n\nCorrection: it is the \"Basilar\" membrane, which is what I say, but somehow between recording the script and actually drawing the stuff I got confused and thought I just pronounced my Vs poorly. Always sad to have such a simple and glaring error in something I put hundreds of hours of work into, but a \"Vasilar\" membrane can be the kind that a Vi draws to explain Viola Vibrations, I guess! Making up new words is just so prolightfully awstastic.\n\nProps to my Bro for excellent and creative swing pushing, and to my Mamma for filming it.\n\nExtra special thanks to my generous donators, without whom I would not have been able to create this video. Because of your support, I have the equipment, time, and take-out Thai food necessary for doing stuff like this.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i_0DXxNeaQ0.mp4/i_0DXxNeaQ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i_0DXxNeaQ0.mp4/i_0DXxNeaQ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i_0DXxNeaQ0.m3u8/i_0DXxNeaQ0.m3u8"}, "slug": "what-is-up-with-noises-the-science-and-mathematics-of-sound-frequency-and-pitch", "video_id": "i_0DXxNeaQ0", "youtube_id": "i_0DXxNeaQ0", "readable_id": "what-is-up-with-noises-the-science-and-mathematics-of-sound-frequency-and-pitch"}, "Z8j5RDOibV4": {"duration": 298, "path": "khan/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex/dividing-complex-numbers/", "keywords": "u16_l4_t2_we5, Dividing, Complex, Numbers", "id": "Z8j5RDOibV4", "title": "Dividing complex numbers", "description": "Dividing Complex Numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z8j5RDOibV4.mp4/Z8j5RDOibV4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z8j5RDOibV4.mp4/Z8j5RDOibV4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z8j5RDOibV4.m3u8/Z8j5RDOibV4.m3u8"}, "slug": "dividing-complex-numbers", "video_id": "Z8j5RDOibV4", "youtube_id": "Z8j5RDOibV4", "readable_id": "dividing-complex-numbers"}, "WhGOmAwuQTE": {"duration": 343, "path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/ed-kienholz-and-nancy-reddin-kienholz-useful-art-5-the-western-hotel-1992/", "keywords": "Final, Kienholz", "id": "WhGOmAwuQTE", "title": "Ed Kienholz and Nancy Reddin Kienholz Useful Art #5: The Western Hotel, 1992", "description": "Ed Kienholz and Nancy Reddin Kienholz, Useful Art #5: The Western Hotel, 1992\n(Portland Art Museum)\n\nSpeakers: Tina Olsen, Bruce Guenther", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WhGOmAwuQTE.mp4/WhGOmAwuQTE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WhGOmAwuQTE.mp4/WhGOmAwuQTE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WhGOmAwuQTE.m3u8/WhGOmAwuQTE.m3u8"}, "slug": "ed-kienholz-and-nancy-reddin-kienholz-useful-art-5-the-western-hotel-1992", "video_id": "WhGOmAwuQTE", "youtube_id": "WhGOmAwuQTE", "readable_id": "ed-kienholz-and-nancy-reddin-kienholz-useful-art-5-the-western-hotel-1992"}, "_TnPWbtoLs8": {"duration": 52, "path": "khan/college-admissions/paying-for-college/grants-and-scholarships/ss-searching-for-scholarships/", "keywords": "", "id": "_TnPWbtoLs8", "title": "Student story: Searching for scholarships", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_TnPWbtoLs8.mp4/_TnPWbtoLs8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_TnPWbtoLs8.mp4/_TnPWbtoLs8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_TnPWbtoLs8.m3u8/_TnPWbtoLs8.m3u8"}, "slug": "ss-searching-for-scholarships", "video_id": "_TnPWbtoLs8", "youtube_id": "_TnPWbtoLs8", "readable_id": "ss-searching-for-scholarships"}, "X36GTLhw3Gw": {"duration": 356, "path": "khan/math/integral-calculus/integration-techniques/reverse-chain-rule/reverse-chain-rule-introduction/", "keywords": "", "id": "X36GTLhw3Gw", "title": "Reverse chain rule introduction", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X36GTLhw3Gw.mp4/X36GTLhw3Gw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X36GTLhw3Gw.mp4/X36GTLhw3Gw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X36GTLhw3Gw.m3u8/X36GTLhw3Gw.m3u8"}, "slug": "reverse-chain-rule-introduction", "video_id": "X36GTLhw3Gw", "youtube_id": "X36GTLhw3Gw", "readable_id": "reverse-chain-rule-introduction"}, "EbRxaBShveI": {"duration": 609, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/hydrohalogenation-of-alkynes/", "keywords": "", "id": "EbRxaBShveI", "title": "Hydrohalogenation of alkynes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EbRxaBShveI.mp4/EbRxaBShveI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EbRxaBShveI.mp4/EbRxaBShveI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EbRxaBShveI.m3u8/EbRxaBShveI.m3u8"}, "slug": "hydrohalogenation-of-alkynes", "video_id": "EbRxaBShveI", "youtube_id": "EbRxaBShveI", "readable_id": "hydrohalogenation-of-alkynes"}, "sCHiJVnyo4g": {"duration": 186, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-4-roaming-deer/", "keywords": "", "id": "sCHiJVnyo4g", "title": "4 Roaming deer", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sCHiJVnyo4g.mp4/sCHiJVnyo4g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sCHiJVnyo4g.mp4/sCHiJVnyo4g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sCHiJVnyo4g.m3u8/sCHiJVnyo4g.m3u8"}, "slug": "sat-4-roaming-deer", "video_id": "sCHiJVnyo4g", "youtube_id": "sCHiJVnyo4g", "readable_id": "sat-4-roaming-deer"}, "IL3UCuXrUzE": {"duration": 540, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/slope-intercept-form/slope-intercept-form/", "keywords": "", "id": "IL3UCuXrUzE", "title": "Slope-intercept form", "description": "Slope-intercept form", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IL3UCuXrUzE.mp4/IL3UCuXrUzE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IL3UCuXrUzE.mp4/IL3UCuXrUzE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IL3UCuXrUzE.m3u8/IL3UCuXrUzE.m3u8"}, "slug": "slope-intercept-form", "video_id": "IL3UCuXrUzE", "youtube_id": "IL3UCuXrUzE", "readable_id": "slope-intercept-form"}, "sz4DpNzB5Wo": {"duration": 361, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q9-easier/", "keywords": "", "id": "sz4DpNzB5Wo", "title": "Center, spread, and shape of distributions \u2014 Basic example", "description": "Watch Sal work through a basic Center, spread, and shape of distributions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sz4DpNzB5Wo.mp4/sz4DpNzB5Wo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sz4DpNzB5Wo.mp4/sz4DpNzB5Wo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sz4DpNzB5Wo.m3u8/sz4DpNzB5Wo.m3u8"}, "slug": "sat-math-q9-easier", "video_id": "sz4DpNzB5Wo", "youtube_id": "sz4DpNzB5Wo", "readable_id": "sat-math-q9-easier"}, "cTyNpXB92bQ": {"duration": 975, "path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/lin-alg-a-projection-onto-a-subspace-is-a-linear-transforma/", "keywords": "subspace, linear, transformation", "id": "cTyNpXB92bQ", "title": "A projection onto a subspace is a linear transformation", "description": "Showing that a projection onto a subspace is a linear transformation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cTyNpXB92bQ.mp4/cTyNpXB92bQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cTyNpXB92bQ.mp4/cTyNpXB92bQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cTyNpXB92bQ.m3u8/cTyNpXB92bQ.m3u8"}, "slug": "lin-alg-a-projection-onto-a-subspace-is-a-linear-transforma", "video_id": "cTyNpXB92bQ", "youtube_id": "cTyNpXB92bQ", "readable_id": "lin-alg-a-projection-onto-a-subspace-is-a-linear-transforma"}, "UlHo2cxKA84": {"duration": 692, "path": "khan/test-prep/gmat/problem-solving/gmat-math-2/", "keywords": "GMAT, math, problem, solving", "id": "UlHo2cxKA84", "title": "GMAT: Math 2", "description": "7-11, pg. 153", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UlHo2cxKA84.mp4/UlHo2cxKA84.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UlHo2cxKA84.mp4/UlHo2cxKA84.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UlHo2cxKA84.m3u8/UlHo2cxKA84.m3u8"}, "slug": "gmat-math-2", "video_id": "UlHo2cxKA84", "youtube_id": "UlHo2cxKA84", "readable_id": "gmat-math-2"}, "mVlCXkht6hg": {"duration": 429, "path": "khan/math/trigonometry/trig-function-graphs/modeling-periodic-functions/modeling-temperature-fluxtuations/", "keywords": "", "id": "mVlCXkht6hg", "title": "Modeling annual temperature variation with trigonometry", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mVlCXkht6hg.mp4/mVlCXkht6hg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mVlCXkht6hg.mp4/mVlCXkht6hg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mVlCXkht6hg.m3u8/mVlCXkht6hg.m3u8"}, "slug": "modeling-temperature-fluxtuations", "video_id": "mVlCXkht6hg", "youtube_id": "mVlCXkht6hg", "readable_id": "modeling-temperature-fluxtuations"}, "SnbXQTTHGs4": {"duration": 556, "path": "khan/test-prep/mcat/chemical-processes/separations-purifications/basics-of-chromatography/", "keywords": "chromatography", "id": "SnbXQTTHGs4", "title": "Basics of chromatography", "description": "Understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exchange, ion exchange, affinity, HPLC, and. By Angela Guerrero.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SnbXQTTHGs4.mp4/SnbXQTTHGs4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SnbXQTTHGs4.mp4/SnbXQTTHGs4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SnbXQTTHGs4.m3u8/SnbXQTTHGs4.m3u8"}, "slug": "basics-of-chromatography", "video_id": "SnbXQTTHGs4", "youtube_id": "SnbXQTTHGs4", "readable_id": "basics-of-chromatography"}, "2mzuFKCuDg4": {"duration": 123, "path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/angle-sense-example/", "keywords": "", "id": "2mzuFKCuDg4", "title": "Identify the angle example", "description": "We're matching the visual angle with the corresponding angle measure. Great practice. See if you do it on your own before listening to Sal!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2mzuFKCuDg4.mp4/2mzuFKCuDg4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2mzuFKCuDg4.mp4/2mzuFKCuDg4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2mzuFKCuDg4.m3u8/2mzuFKCuDg4.m3u8"}, "slug": "angle-sense-example", "video_id": "2mzuFKCuDg4", "youtube_id": "2mzuFKCuDg4", "readable_id": "angle-sense-example"}, "4fQeHtSdw80": {"duration": 312, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/special-products-of-polynomials/special-products-of-polynomials-2/", "keywords": "U08_L2_T4_we2, Special, Products, of, Polynomials, CC_39336_A-APR_1", "id": "4fQeHtSdw80", "title": "How to find the square of a binomial with two variables (example)", "description": "Sal finds the area of a square with side (6x-5y).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4fQeHtSdw80.mp4/4fQeHtSdw80.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4fQeHtSdw80.mp4/4fQeHtSdw80.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4fQeHtSdw80.m3u8/4fQeHtSdw80.m3u8"}, "slug": "special-products-of-polynomials-2", "video_id": "4fQeHtSdw80", "youtube_id": "4fQeHtSdw80", "readable_id": "special-products-of-polynomials-2"}, "uR5ZWegnTvA": {"duration": 39, "path": "khan/science/discoveries-projects/lego-robotics/lego-coin-detector/lego-coin-detector/", "keywords": "", "id": "uR5ZWegnTvA", "title": "Construction", "description": "You can get started with this simple design, then add your own complexity after!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uR5ZWegnTvA.mp4/uR5ZWegnTvA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uR5ZWegnTvA.mp4/uR5ZWegnTvA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uR5ZWegnTvA.m3u8/uR5ZWegnTvA.m3u8"}, "slug": "lego-coin-detector", "video_id": "uR5ZWegnTvA", "youtube_id": "uR5ZWegnTvA", "readable_id": "lego-coin-detector"}, "hl58vTCqVIY": {"duration": 450, "path": "khan/math/algebra2/conics_precalc/hyperbolas-precalc/conic-sections-hyperbolas-2/", "keywords": "hyperbola, conic, section", "id": "hl58vTCqVIY", "title": "Conic sections: Hyperbolas 2", "description": "Continuation of the intro to hyperbolas", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hl58vTCqVIY.mp4/hl58vTCqVIY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hl58vTCqVIY.mp4/hl58vTCqVIY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hl58vTCqVIY.m3u8/hl58vTCqVIY.m3u8"}, "slug": "conic-sections-hyperbolas-2", "video_id": "hl58vTCqVIY", "youtube_id": "hl58vTCqVIY", "readable_id": "conic-sections-hyperbolas-2"}, "_r57JvsDVCc": {"duration": 124, "path": "khan/partner-content/pixar/rendering/rendering1/susan-fong/", "keywords": "", "id": "_r57JvsDVCc", "title": "Getting to know Susan Fong", "description": "Find out more about Susan Fong!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_r57JvsDVCc.mp4/_r57JvsDVCc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_r57JvsDVCc.mp4/_r57JvsDVCc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_r57JvsDVCc.m3u8/_r57JvsDVCc.m3u8"}, "slug": "susan-fong", "video_id": "_r57JvsDVCc", "youtube_id": "_r57JvsDVCc", "readable_id": "susan-fong"}, "m5OxVgH-T1I": {"duration": 123, "path": "khan/humanities/monarchy-enlightenment/rococo/18th-c-french-mechanical-table/", "keywords": "", "id": "m5OxVgH-T1I", "title": "Construction of an 18th-century French mechanical table", "description": "The innovative mechanics and artistry of Jean-Fran\u00e7ois Oeben's table continue to amaze.\u00a0Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m5OxVgH-T1I.mp4/m5OxVgH-T1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m5OxVgH-T1I.mp4/m5OxVgH-T1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m5OxVgH-T1I.m3u8/m5OxVgH-T1I.m3u8"}, "slug": "18th-c-french-mechanical-table", "video_id": "m5OxVgH-T1I", "youtube_id": "m5OxVgH-T1I", "readable_id": "18th-c-french-mechanical-table"}, "EO4_vu9IuNk": {"duration": 537, "path": "khan/test-prep/mcat/processing-the-environment/taste-gustation-and-smell-olfaction/pheromones/", "keywords": "", "id": "EO4_vu9IuNk", "title": "Pheromones", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EO4_vu9IuNk.mp4/EO4_vu9IuNk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EO4_vu9IuNk.mp4/EO4_vu9IuNk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EO4_vu9IuNk.m3u8/EO4_vu9IuNk.m3u8"}, "slug": "pheromones", "video_id": "EO4_vu9IuNk", "youtube_id": "EO4_vu9IuNk", "readable_id": "pheromones"}, "PrsWs8Pmjao": {"duration": 125, "path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/hotspot-case-study-philipines/", "keywords": "", "id": "PrsWs8Pmjao", "title": "Biodiversity hotspot case study: Philippines", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PrsWs8Pmjao.mp4/PrsWs8Pmjao.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PrsWs8Pmjao.mp4/PrsWs8Pmjao.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PrsWs8Pmjao.m3u8/PrsWs8Pmjao.m3u8"}, "slug": "hotspot-case-study-philipines", "video_id": "PrsWs8Pmjao", "youtube_id": "PrsWs8Pmjao", "readable_id": "hotspot-case-study-philipines"}, "ZouQdHSyelg": {"duration": 722, "path": "khan/math/pre-algebra/order-of-operations/arithmetic_properties/ca-algebra-i-number-properties-and-absolute-value/", "keywords": "californa, standards, algebra, inequality, equations", "id": "ZouQdHSyelg", "title": "CA Algebra I: Number properties and absolute value", "description": "1-7, number properties and absolute value equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZouQdHSyelg.mp4/ZouQdHSyelg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZouQdHSyelg.mp4/ZouQdHSyelg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZouQdHSyelg.m3u8/ZouQdHSyelg.m3u8"}, "slug": "ca-algebra-i-number-properties-and-absolute-value", "video_id": "ZouQdHSyelg", "youtube_id": "ZouQdHSyelg", "readable_id": "ca-algebra-i-number-properties-and-absolute-value"}, "8bCL8TQZFKo": {"duration": 728, "path": "khan/science/chemistry/thermodynamics-chemistry/enthalpy-chemistry-sal/hess-s-law-example/", "keywords": "Hess's, Law, Example", "id": "8bCL8TQZFKo", "title": "Hess's law example", "description": "Hess's law example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8bCL8TQZFKo.mp4/8bCL8TQZFKo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8bCL8TQZFKo.mp4/8bCL8TQZFKo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8bCL8TQZFKo.m3u8/8bCL8TQZFKo.m3u8"}, "slug": "hess-s-law-example", "video_id": "8bCL8TQZFKo", "youtube_id": "8bCL8TQZFKo", "readable_id": "hess-s-law-example"}, "k3aKKasOmIw": {"duration": 235, "path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-statistics/mean-median-and-mode/", "keywords": "u08_l2_t1_we1, Mean, Median, and, Mode", "id": "k3aKKasOmIw", "title": "Finding mean, median, and mode", "description": "Here we give you a set of numbers and then ask you to find the mean, median, and mode. It's your first opportunity to practice with us!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/k3aKKasOmIw.mp4/k3aKKasOmIw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/k3aKKasOmIw.mp4/k3aKKasOmIw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/k3aKKasOmIw.m3u8/k3aKKasOmIw.m3u8"}, "slug": "mean-median-and-mode", "video_id": "k3aKKasOmIw", "youtube_id": "k3aKKasOmIw", "readable_id": "mean-median-and-mode"}, "47QgqdeSi0U": {"duration": 297, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/giotto-arena-scrovegni-chapel-padua-c-1305-part-1-of-4/", "keywords": "Giotto, Arena, Chapel, Scrovegni, Padua, fresco, Medieval, Proto-Renaissance, painting", "id": "47QgqdeSi0U", "title": "Giotto, Arena (Scrovegni) Chapel (part 1)", "description": "Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305, Part 1\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/47QgqdeSi0U.mp4/47QgqdeSi0U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/47QgqdeSi0U.mp4/47QgqdeSi0U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/47QgqdeSi0U.m3u8/47QgqdeSi0U.m3u8"}, "slug": "giotto-arena-scrovegni-chapel-padua-c-1305-part-1-of-4", "video_id": "47QgqdeSi0U", "youtube_id": "47QgqdeSi0U", "readable_id": "giotto-arena-scrovegni-chapel-padua-c-1305-part-1-of-4"}, "ZWSoyUxAQW0": {"duration": 596, "path": "khan/math/trigonometry/less-basic-trigonometry/trig_iden_tutorial/trig-identities-part-2-parr-4-if-you-watch-the-proofs/", "keywords": "Trig, trigonometry, trigonometric, identities, math, khan", "id": "ZWSoyUxAQW0", "title": "Trig identities part 2 (part 4 if you watch the proofs)", "description": "More playing around with trig identities", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZWSoyUxAQW0.mp4/ZWSoyUxAQW0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZWSoyUxAQW0.mp4/ZWSoyUxAQW0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZWSoyUxAQW0.m3u8/ZWSoyUxAQW0.m3u8"}, "slug": "trig-identities-part-2-parr-4-if-you-watch-the-proofs", "video_id": "ZWSoyUxAQW0", "youtube_id": "ZWSoyUxAQW0", "readable_id": "trig-identities-part-2-parr-4-if-you-watch-the-proofs"}, "_DgeQ7rpIHI": {"duration": 262, "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/caspar-david-friedrich-abbey-among-oak-trees-1809-or-1810/", "keywords": "Friedrich, Abbey, GAP, Caspar David Friedrich, Abbey among Oak Trees, Abbey in an Oak Wood, 1809, 1810, Alte Nationalgalerie, Berlin, Romanticism, Ruins, Gothic, Twilight, painting, burial, monks, Winter, Google Art Project, Khan Academy, Smarthistory, OER", "id": "_DgeQ7rpIHI", "title": "Friedrich, Abbey among Oak Trees", "description": "Caspar David Friedrich, Abbey among Oak Trees, 1809 or 1810, oil on canvas, 110.4 x 171 cm (Alte Nationalgalerie, Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_DgeQ7rpIHI.mp4/_DgeQ7rpIHI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_DgeQ7rpIHI.mp4/_DgeQ7rpIHI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_DgeQ7rpIHI.m3u8/_DgeQ7rpIHI.m3u8"}, "slug": "caspar-david-friedrich-abbey-among-oak-trees-1809-or-1810", "video_id": "_DgeQ7rpIHI", "youtube_id": "_DgeQ7rpIHI", "readable_id": "caspar-david-friedrich-abbey-among-oak-trees-1809-or-1810"}, "_kfB2qKjdgM": {"duration": 596, "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/control-of-the-gi-tract/", "keywords": "MCAT", "id": "_kfB2qKjdgM", "title": "Control of the GI tract", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_kfB2qKjdgM.mp4/_kfB2qKjdgM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_kfB2qKjdgM.mp4/_kfB2qKjdgM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_kfB2qKjdgM.m3u8/_kfB2qKjdgM.m3u8"}, "slug": "control-of-the-gi-tract", "video_id": "_kfB2qKjdgM", "youtube_id": "_kfB2qKjdgM", "readable_id": "control-of-the-gi-tract"}, "aGwT2-RERXY": {"duration": 601, "path": "khan/math/geometry/triangle-properties/altitudes/proof-triangle-altitudes-are-concurrent-orthocenter/", "keywords": "geometry, perpendicular, bisectors", "id": "aGwT2-RERXY", "title": "Proof: Triangle altitudes are concurrent (orthocenter)", "description": "Showing that any triangle can be the medial triangle for some larger triangle. Using this to show that the altitudes of a triangle are concurrent (at the orthocenter).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aGwT2-RERXY.mp4/aGwT2-RERXY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aGwT2-RERXY.mp4/aGwT2-RERXY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aGwT2-RERXY.m3u8/aGwT2-RERXY.m3u8"}, "slug": "proof-triangle-altitudes-are-concurrent-orthocenter", "video_id": "aGwT2-RERXY", "youtube_id": "aGwT2-RERXY", "readable_id": "proof-triangle-altitudes-are-concurrent-orthocenter"}, "qW-Ce44ll0Q": {"duration": 188, "path": "khan/math/pre-algebra/negatives-absolute-value-pre-alg/add-sub-negatives-pre-alg/number-line-3-exercise-example/", "keywords": "", "id": "qW-Ce44ll0Q", "title": "Negative numbers and number line examples", "description": "Given a few negative numbers on a number line, let's see if we can determine what negative numbers are elsewhere on the number line.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qW-Ce44ll0Q.mp4/qW-Ce44ll0Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qW-Ce44ll0Q.mp4/qW-Ce44ll0Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qW-Ce44ll0Q.m3u8/qW-Ce44ll0Q.m3u8"}, "slug": "number-line-3-exercise-example", "video_id": "qW-Ce44ll0Q", "youtube_id": "qW-Ce44ll0Q", "readable_id": "number-line-3-exercise-example"}, "a1AhZoWTLUI": {"duration": 697, "path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-37/", "keywords": "crash course", "id": "a1AhZoWTLUI", "title": "Communists, Nationalists, and China's Revolutions", "description": "In which John Green teaches you about China's Revolutions. While the rest of the world was off having a couple of World Wars, China was busily uprooting the dynastic system that had ruled there for millennia. Most revolutions have some degree of tumult associated with them, but China's 20th century revolutions were REALLY disruptive. In 1911 and 1912, Chinese nationalists brought 3000 years of dynastic rule to an end. China plunged into chaos as warlords staked out regions of the country for themselves. The nationalists and communists joined forces briefly to bring the nation back together under the Chinese Republic, and then they quickly split and started fighting the Chinese Civil War. The fight between nationalists and communists went on for decades, and was interrupted by an alliance to fight the invading Japanese during World War II. After the World War II ended, the Chinese Civil War was back on. Mao and the communists were ultimately victorious, and Chiang Kai-Shek ended up in Taiwan. And then it got weird. Mao spent years repeatedly trying to purify the Communist Party and build up the new People's Republic of China with Rectifications, Anti Campaigns, Five Year Plans. the Great Leap Forward, and the Cultural Revolution. These had mixed results, to say the least. John will cover all this and more in this week's Crash Course World History.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a1AhZoWTLUI.mp4/a1AhZoWTLUI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a1AhZoWTLUI.mp4/a1AhZoWTLUI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a1AhZoWTLUI.m3u8/a1AhZoWTLUI.m3u8"}, "slug": "crash-course-world-history-37", "video_id": "a1AhZoWTLUI", "youtube_id": "a1AhZoWTLUI", "readable_id": "crash-course-world-history-37"}, "kVGb778WcMU": {"duration": 506, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/common-stroke-signs-and-symptoms/", "keywords": "", "id": "kVGb778WcMU", "title": "Common stroke signs and symptoms", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kVGb778WcMU.mp4/kVGb778WcMU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kVGb778WcMU.mp4/kVGb778WcMU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kVGb778WcMU.m3u8/kVGb778WcMU.m3u8"}, "slug": "common-stroke-signs-and-symptoms", "video_id": "kVGb778WcMU", "youtube_id": "kVGb778WcMU", "readable_id": "common-stroke-signs-and-symptoms"}, "3Iu1Z0h1i1Y": {"duration": 320, "path": "khan/partner-content/pixar/start/introduction/pipeline-video/", "keywords": "", "id": "3Iu1Z0h1i1Y", "title": "Start here!", "description": "Overview of Pixar in a Box.\nCLICK HERE to get started.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3Iu1Z0h1i1Y.mp4/3Iu1Z0h1i1Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3Iu1Z0h1i1Y.mp4/3Iu1Z0h1i1Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3Iu1Z0h1i1Y.m3u8/3Iu1Z0h1i1Y.m3u8"}, "slug": "pipeline-video", "video_id": "3Iu1Z0h1i1Y", "youtube_id": "3Iu1Z0h1i1Y", "readable_id": "pipeline-video"}, "4rsswT_Rv1M": {"duration": 722, "path": "khan/test-prep/mcat/physical-processes/current-and-resistance/resistivity-and-conductivity/", "keywords": "", "id": "4rsswT_Rv1M", "title": "Resistivity and conductivity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4rsswT_Rv1M.mp4/4rsswT_Rv1M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4rsswT_Rv1M.mp4/4rsswT_Rv1M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4rsswT_Rv1M.m3u8/4rsswT_Rv1M.m3u8"}, "slug": "resistivity-and-conductivity", "video_id": "4rsswT_Rv1M", "youtube_id": "4rsswT_Rv1M", "readable_id": "resistivity-and-conductivity"}, "-QpkmwIoMaY": {"duration": 962, "path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/vapor-pressure-example/", "keywords": "Vapor, pressure, ideal, gas, law, universal, constant, tutorial, educational", "id": "-QpkmwIoMaY", "title": "Vapor pressure example", "description": "Vapor pressure example using the ideal gas law.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-QpkmwIoMaY.mp4/-QpkmwIoMaY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-QpkmwIoMaY.mp4/-QpkmwIoMaY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-QpkmwIoMaY.m3u8/-QpkmwIoMaY.m3u8"}, "slug": "vapor-pressure-example", "video_id": "-QpkmwIoMaY", "youtube_id": "-QpkmwIoMaY", "readable_id": "vapor-pressure-example"}, "J-NC1M6obKo": {"duration": 301, "path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-and-back-substitution/", "keywords": "", "id": "J-NC1M6obKo", "title": "u-substitution and back substitution", "description": "Using u-substitution and \"back substituting\" for x to simplify an expression", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J-NC1M6obKo.mp4/J-NC1M6obKo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J-NC1M6obKo.mp4/J-NC1M6obKo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J-NC1M6obKo.m3u8/J-NC1M6obKo.m3u8"}, "slug": "u-substitution-and-back-substitution", "video_id": "J-NC1M6obKo", "youtube_id": "J-NC1M6obKo", "readable_id": "u-substitution-and-back-substitution"}, "JNL6f1xkie4": {"duration": 698, "path": "khan/economics-finance-domain/core-finance/housing/renting-v-buying/renting-versus-buying-a-home/", "keywords": "", "id": "JNL6f1xkie4", "title": "Renting versus buying a home", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JNL6f1xkie4.mp4/JNL6f1xkie4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JNL6f1xkie4.mp4/JNL6f1xkie4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JNL6f1xkie4.m3u8/JNL6f1xkie4.m3u8"}, "slug": "renting-versus-buying-a-home", "video_id": "JNL6f1xkie4", "youtube_id": "JNL6f1xkie4", "readable_id": "renting-versus-buying-a-home"}, "u4-HYwo0Gsc": {"duration": 683, "path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/first-law-of-thermodynamics/", "keywords": "", "id": "u4-HYwo0Gsc", "title": "First law of thermodynamics", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u4-HYwo0Gsc.mp4/u4-HYwo0Gsc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u4-HYwo0Gsc.mp4/u4-HYwo0Gsc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u4-HYwo0Gsc.m3u8/u4-HYwo0Gsc.m3u8"}, "slug": "first-law-of-thermodynamics", "video_id": "u4-HYwo0Gsc", "youtube_id": "u4-HYwo0Gsc", "readable_id": "first-law-of-thermodynamics"}, "dTst62XXJ8g": {"duration": 614, "path": "khan/test-prep/mcat/chemical-processes/stereochemistry/conformational-analysis-of-butane/", "keywords": "", "id": "dTst62XXJ8g", "title": "Conformational analysis of butane", "description": "How to analyze the staggered and eclipsed conformations of butane", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dTst62XXJ8g.mp4/dTst62XXJ8g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dTst62XXJ8g.mp4/dTst62XXJ8g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dTst62XXJ8g.m3u8/dTst62XXJ8g.m3u8"}, "slug": "conformational-analysis-of-butane", "video_id": "dTst62XXJ8g", "youtube_id": "dTst62XXJ8g", "readable_id": "conformational-analysis-of-butane"}, "JxZ8WGsuuvI": {"duration": 538, "path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/force-of-friction-keeping-velocity-constant-edited/", "keywords": "", "id": "JxZ8WGsuuvI", "title": "Force of friction keeping velocity constant", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JxZ8WGsuuvI.mp4/JxZ8WGsuuvI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JxZ8WGsuuvI.mp4/JxZ8WGsuuvI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JxZ8WGsuuvI.m3u8/JxZ8WGsuuvI.m3u8"}, "slug": "force-of-friction-keeping-velocity-constant-edited", "video_id": "JxZ8WGsuuvI", "youtube_id": "JxZ8WGsuuvI", "readable_id": "force-of-friction-keeping-velocity-constant-edited"}, "qyYSQDcSNlY": {"duration": 471, "path": "khan/math/probability/statistical-studies/statistical-questions/statistical-questions/", "keywords": "", "id": "qyYSQDcSNlY", "title": "Statistical and non statistical questions", "description": "Here's the thing to ask when determining if you have a statistical and non-statistical question on your hand: Is there variability involved? Watch and we'll explain.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qyYSQDcSNlY.mp4/qyYSQDcSNlY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qyYSQDcSNlY.mp4/qyYSQDcSNlY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qyYSQDcSNlY.m3u8/qyYSQDcSNlY.m3u8"}, "slug": "statistical-questions", "video_id": "qyYSQDcSNlY", "youtube_id": "qyYSQDcSNlY", "readable_id": "statistical-questions"}, "afWnU10ZNfg": {"duration": 390, "path": "khan/science/biology/membranes-and-transport/diffusion-and-osmosis/hypotonic-isotonic-and-hypertonic-solutions-tonicity/", "keywords": "education,online learning,learning,lessons", "id": "afWnU10ZNfg", "title": "Hypotonic, isotonic, and hypertonic solutions (tonicity)", "description": "Hypotonic, isotonic and hypertonic solutions (tonicity). Seeing the effect of various types of solution on the direction of osmosis.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/afWnU10ZNfg.mp4/afWnU10ZNfg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/afWnU10ZNfg.mp4/afWnU10ZNfg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/afWnU10ZNfg.m3u8/afWnU10ZNfg.m3u8"}, "slug": "hypotonic-isotonic-and-hypertonic-solutions-tonicity", "video_id": "afWnU10ZNfg", "youtube_id": "afWnU10ZNfg", "readable_id": "hypotonic-isotonic-and-hypertonic-solutions-tonicity"}, "5vJbhxYchPQ": {"duration": 157, "path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-school-redesign/sscc-blended-schoolintro/", "keywords": "", "id": "5vJbhxYchPQ", "title": "School redesign - intro and big ideas", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5vJbhxYchPQ.mp4/5vJbhxYchPQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5vJbhxYchPQ.mp4/5vJbhxYchPQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5vJbhxYchPQ.m3u8/5vJbhxYchPQ.m3u8"}, "slug": "sscc-blended-schoolintro", "video_id": "5vJbhxYchPQ", "youtube_id": "5vJbhxYchPQ", "readable_id": "sscc-blended-schoolintro"}, "qLU0X154wlE": {"duration": 757, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/quantum-numbers-for-the-first-four-shells/", "keywords": "", "id": "qLU0X154wlE", "title": "Quantum numbers for the first four shells", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qLU0X154wlE.mp4/qLU0X154wlE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qLU0X154wlE.mp4/qLU0X154wlE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qLU0X154wlE.m3u8/qLU0X154wlE.m3u8"}, "slug": "quantum-numbers-for-the-first-four-shells", "video_id": "qLU0X154wlE", "youtube_id": "qLU0X154wlE", "readable_id": "quantum-numbers-for-the-first-four-shells"}, "qyvwN-2PoXA": {"duration": 132, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-more-fewer-100/fewer-word-problems/", "keywords": "", "id": "qyvwN-2PoXA", "title": "\"Fewer\" word problems", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qyvwN-2PoXA.mp4/qyvwN-2PoXA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qyvwN-2PoXA.mp4/qyvwN-2PoXA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qyvwN-2PoXA.m3u8/qyvwN-2PoXA.m3u8"}, "slug": "fewer-word-problems", "video_id": "qyvwN-2PoXA", "youtube_id": "qyvwN-2PoXA", "readable_id": "fewer-word-problems"}, "hxqo_DiL3pw": {"duration": 333, "path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/proof-that-there-is-an-irrational-number-between-any-two-rational-numbers/", "keywords": "", "id": "hxqo_DiL3pw", "title": "Proof that there is an irrational number between any two rational numbers", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hxqo_DiL3pw.mp4/hxqo_DiL3pw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hxqo_DiL3pw.mp4/hxqo_DiL3pw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hxqo_DiL3pw.m3u8/hxqo_DiL3pw.m3u8"}, "slug": "proof-that-there-is-an-irrational-number-between-any-two-rational-numbers", "video_id": "hxqo_DiL3pw", "youtube_id": "hxqo_DiL3pw", "readable_id": "proof-that-there-is-an-irrational-number-between-any-two-rational-numbers"}, "Kox-FerE8AY": {"duration": 54, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2008-may-4-8/", "keywords": "", "id": "Kox-FerE8AY", "title": "8 Area of inscribed circle", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Kox-FerE8AY.mp4/Kox-FerE8AY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Kox-FerE8AY.mp4/Kox-FerE8AY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Kox-FerE8AY.m3u8/Kox-FerE8AY.m3u8"}, "slug": "sat-2008-may-4-8", "video_id": "Kox-FerE8AY", "youtube_id": "Kox-FerE8AY", "readable_id": "sat-2008-may-4-8"}, "3n0LvI99-KM": {"duration": 495, "path": "khan/math/geometry/congruence/theorems-using-triangle-congruence/problem-involving-angle-derived-from-square-and-circle/", "keywords": "geometry, circle, radius", "id": "3n0LvI99-KM", "title": "How to prove general theorems using triangle congruence (example)", "description": "Sal finds a missing angle in a diagram that contains sector of a circle inscribed within a square.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3n0LvI99-KM.mp4/3n0LvI99-KM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3n0LvI99-KM.mp4/3n0LvI99-KM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3n0LvI99-KM.m3u8/3n0LvI99-KM.m3u8"}, "slug": "problem-involving-angle-derived-from-square-and-circle", "video_id": "3n0LvI99-KM", "youtube_id": "3n0LvI99-KM", "readable_id": "problem-involving-angle-derived-from-square-and-circle"}, "5PmSbASb1yY": {"duration": 609, "path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-challenging-assumptions/sscc-blended-newgroups/", "keywords": "", "id": "5PmSbASb1yY", "title": "New ways to group students and organize staff", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5PmSbASb1yY.mp4/5PmSbASb1yY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5PmSbASb1yY.mp4/5PmSbASb1yY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5PmSbASb1yY.m3u8/5PmSbASb1yY.m3u8"}, "slug": "sscc-blended-newgroups", "video_id": "5PmSbASb1yY", "youtube_id": "5PmSbASb1yY", "readable_id": "sscc-blended-newgroups"}, "Kf9KjCKmDcU": {"duration": 91, "path": "khan/computing/computer-science/cryptography/crypt/intro-to-cryptography/", "keywords": "Cryptography, brit cruise", "id": "Kf9KjCKmDcU", "title": "What is cryptography?", "description": "What is Cryptography? A story which takes us from Caesar to Claude Shannon.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Kf9KjCKmDcU.mp4/Kf9KjCKmDcU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Kf9KjCKmDcU.mp4/Kf9KjCKmDcU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Kf9KjCKmDcU.m3u8/Kf9KjCKmDcU.m3u8"}, "slug": "intro-to-cryptography", "video_id": "Kf9KjCKmDcU", "youtube_id": "Kf9KjCKmDcU", "readable_id": "intro-to-cryptography"}, "xZBbfLLfVV4": {"duration": 527, "path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverting-3x3-part-1-calculating-matrix-of-minors-and-cofactor-matrix/", "keywords": "", "id": "xZBbfLLfVV4", "title": "Inverting 3x3 part 1: Calculating matrix of minors and cofactor matrix", "description": "Beginning our quest to invert a 3x3 matrix. We calculate the matrix of minors and the cofactor matrix.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xZBbfLLfVV4.mp4/xZBbfLLfVV4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xZBbfLLfVV4.mp4/xZBbfLLfVV4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xZBbfLLfVV4.m3u8/xZBbfLLfVV4.m3u8"}, "slug": "inverting-3x3-part-1-calculating-matrix-of-minors-and-cofactor-matrix", "video_id": "xZBbfLLfVV4", "youtube_id": "xZBbfLLfVV4", "readable_id": "inverting-3x3-part-1-calculating-matrix-of-minors-and-cofactor-matrix"}, "dwleadLC2Dw": {"duration": 123, "path": "khan/economics-finance-domain/core-finance/derivative-securities/mort-backed-secs-tut/mortgage-back-security-overview/", "keywords": "mortgage, back, security, MBD, credit, crisis", "id": "dwleadLC2Dw", "title": "Mortgage-backed security overview", "description": "Basics of how a mortgage back security works", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dwleadLC2Dw.mp4/dwleadLC2Dw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dwleadLC2Dw.mp4/dwleadLC2Dw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dwleadLC2Dw.m3u8/dwleadLC2Dw.m3u8"}, "slug": "mortgage-back-security-overview", "video_id": "dwleadLC2Dw", "youtube_id": "dwleadLC2Dw", "readable_id": "mortgage-back-security-overview"}, "vQW94GVN524": {"duration": 110, "path": "khan/partner-content/exploratorium/light-and-color/soap-film-on-can/soap-film-whatsgoingon/", "keywords": "", "id": "vQW94GVN524", "title": "What\u2019s going on: Reflections, interference, and \u2026 a water sandwich?", "description": "This video helps you understand how light interacts with your water sandwich\u2014ahem: soap film! Learn how\u00a0reflections cancel out\u00a0some\u00a0colors\u00a0but not others,\u00a0resulting in\u00a0those bands of color that stretch across the film can.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vQW94GVN524.mp4/vQW94GVN524.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vQW94GVN524.mp4/vQW94GVN524.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vQW94GVN524.m3u8/vQW94GVN524.m3u8"}, "slug": "soap-film-whatsgoingon", "video_id": "vQW94GVN524", "youtube_id": "vQW94GVN524", "readable_id": "soap-film-whatsgoingon"}, "cnhSTcjanLc": {"duration": 874, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-passages/sat-writing-narrative/", "keywords": "", "id": "cnhSTcjanLc", "title": "Writing: Narrative \u2014 How-to example", "description": "Watch Sal work through an SAT Writing: Narrative passage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cnhSTcjanLc.mp4/cnhSTcjanLc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cnhSTcjanLc.mp4/cnhSTcjanLc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cnhSTcjanLc.m3u8/cnhSTcjanLc.m3u8"}, "slug": "sat-writing-narrative", "video_id": "cnhSTcjanLc", "youtube_id": "cnhSTcjanLc", "readable_id": "sat-writing-narrative"}, "653ZKHd_PYo": {"duration": 241, "path": "khan/humanities/becoming-modern/symbolism/munch-the-storm-1893/", "keywords": "Munch, Art History, Smarthistory, Edvard Munch, MoMA", "id": "653ZKHd_PYo", "title": "Munch, The Storm", "description": "Edvard Munch, The Storm, 1893, oil on canvas, 36 1/8 x 51 1/2\" (91.8 x 130.8 cm), (MoMA)\n\nSpeakers: Dr. Juliana Kreinik, Dr. Amy Hamlin", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/653ZKHd_PYo.mp4/653ZKHd_PYo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/653ZKHd_PYo.mp4/653ZKHd_PYo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/653ZKHd_PYo.m3u8/653ZKHd_PYo.m3u8"}, "slug": "munch-the-storm-1893", "video_id": "653ZKHd_PYo", "youtube_id": "653ZKHd_PYo", "readable_id": "munch-the-storm-1893"}, "ZmqK0X1psDA": {"duration": 587, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/two-forces-divergence/", "keywords": "", "id": "ZmqK0X1psDA", "title": "Piketty's two drivers of divergence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZmqK0X1psDA.mp4/ZmqK0X1psDA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZmqK0X1psDA.mp4/ZmqK0X1psDA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZmqK0X1psDA.m3u8/ZmqK0X1psDA.m3u8"}, "slug": "two-forces-divergence", "video_id": "ZmqK0X1psDA", "youtube_id": "ZmqK0X1psDA", "readable_id": "two-forces-divergence"}, "BGyrSuW3GCg": {"duration": 348, "path": "khan/math/algebra/two-variable-linear-inequalities/constraining-solutions-of-inequalities/constraining-solutions-of-systems-of-inequalities/", "keywords": "education,online learning,learning,lessons", "id": "BGyrSuW3GCg", "title": "How to constraint the solution set of a system of linear inequalities (example)", "description": "Given the graph of a system of inequalities, Sal finds the x-values that make the ordered pair (x,-2) a solution of the system, which is the solution set constrained to y=-2. Then he solves a similar problem where x is constrained to 4.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BGyrSuW3GCg.mp4/BGyrSuW3GCg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BGyrSuW3GCg.mp4/BGyrSuW3GCg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BGyrSuW3GCg.m3u8/BGyrSuW3GCg.m3u8"}, "slug": "constraining-solutions-of-systems-of-inequalities", "video_id": "BGyrSuW3GCg", "youtube_id": "BGyrSuW3GCg", "readable_id": "constraining-solutions-of-systems-of-inequalities"}, "ANnuQZyEKVo": {"duration": 440, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/reflecting-across-two-lines/", "keywords": "", "id": "ANnuQZyEKVo", "title": "How to construct a quadrilateral based on its two lines of symmetry (example)", "description": "Sal solves the following problem:\n\nTwo of the points that define a certain quadrilateral are (-4,-2) and (0,5). The quadrilateral has a\u00a0reflective symmetry over the lines y=x/2 and\u00a0y=-2x + 5.\u00a0Draw and classify the quadrilateral.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ANnuQZyEKVo.mp4/ANnuQZyEKVo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ANnuQZyEKVo.mp4/ANnuQZyEKVo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ANnuQZyEKVo.m3u8/ANnuQZyEKVo.m3u8"}, "slug": "reflecting-across-two-lines", "video_id": "ANnuQZyEKVo", "youtube_id": "ANnuQZyEKVo", "readable_id": "reflecting-across-two-lines"}, "NehkLV77ITk": {"duration": 303, "path": "khan/math/pre-algebra/factors-multiples/divisibility_tests/the-why-of-the-3-divisibility-rule/", "keywords": "divisibility", "id": "NehkLV77ITk", "title": "The why of the 3 divisibility rule", "description": "Why you can add the digits to see if something is divisible by 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NehkLV77ITk.mp4/NehkLV77ITk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NehkLV77ITk.mp4/NehkLV77ITk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NehkLV77ITk.m3u8/NehkLV77ITk.m3u8"}, "slug": "the-why-of-the-3-divisibility-rule", "video_id": "NehkLV77ITk", "youtube_id": "NehkLV77ITk", "readable_id": "the-why-of-the-3-divisibility-rule"}, "d1O54EQ1DSE": {"duration": 334, "path": "khan/math/algebra/algebra-functions/determining-the-domain-of-a-function/domain-of-a-modeling-function-example-3/", "keywords": "", "id": "d1O54EQ1DSE", "title": "How to determine the domain of a modeling function (example with a function that is defined over negative and positive integers)", "description": "Sal determines the domain of a function that models going up and down a ladder.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d1O54EQ1DSE.mp4/d1O54EQ1DSE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d1O54EQ1DSE.mp4/d1O54EQ1DSE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d1O54EQ1DSE.m3u8/d1O54EQ1DSE.m3u8"}, "slug": "domain-of-a-modeling-function-example-3", "video_id": "d1O54EQ1DSE", "youtube_id": "d1O54EQ1DSE", "readable_id": "domain-of-a-modeling-function-example-3"}, "52wxpYnS64U": {"duration": 568, "path": "khan/test-prep/mcat/physical-processes/force-of-tension/tension-in-an-accelerating-system-and-pie-in-the-face/", "keywords": "tension, pie, friction, mass, acceleration, physics", "id": "52wxpYnS64U", "title": "Tension in an accelerating system and pie in the face", "description": "The second part to the complicated problem. We figure out the tension in the wire connecting the two masses. Then we figure our how much we need to accelerate a pie for it to safely reach a man's face.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/52wxpYnS64U.mp4/52wxpYnS64U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/52wxpYnS64U.mp4/52wxpYnS64U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/52wxpYnS64U.m3u8/52wxpYnS64U.m3u8"}, "slug": "tension-in-an-accelerating-system-and-pie-in-the-face", "video_id": "52wxpYnS64U", "youtube_id": "52wxpYnS64U", "readable_id": "tension-in-an-accelerating-system-and-pie-in-the-face"}, "SPZsJN_Wsdc": {"duration": 154, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/standard-form/standard-form-to-slope-intercept-form/", "keywords": "", "id": "SPZsJN_Wsdc", "title": "Converting from standard form to slope-intercept form", "description": "Standard form to slope-intercept form", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SPZsJN_Wsdc.mp4/SPZsJN_Wsdc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SPZsJN_Wsdc.mp4/SPZsJN_Wsdc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SPZsJN_Wsdc.m3u8/SPZsJN_Wsdc.m3u8"}, "slug": "standard-form-to-slope-intercept-form", "video_id": "SPZsJN_Wsdc", "youtube_id": "SPZsJN_Wsdc", "readable_id": "standard-form-to-slope-intercept-form"}, "87-DnbQatO8": {"duration": 181, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-shell/", "keywords": "shell, outer housing, shroud, bumper, bezel, bit-zee, bot, diy, make, hack, do", "id": "87-DnbQatO8", "title": "Chassis modifications", "description": "This video shows how Bit-zee's shell was modified to allow space for the bumper switches.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/87-DnbQatO8.mp4/87-DnbQatO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/87-DnbQatO8.mp4/87-DnbQatO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/87-DnbQatO8.m3u8/87-DnbQatO8.m3u8"}, "slug": "bit-zee-s-shell", "video_id": "87-DnbQatO8", "youtube_id": "87-DnbQatO8", "readable_id": "bit-zee-s-shell"}, "1Smz0zwAELQ": {"duration": 199, "path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/psychoactive-drugs-stimulants/", "keywords": "", "id": "1Smz0zwAELQ", "title": "Psychoactive drugs: Stimulants", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1Smz0zwAELQ.mp4/1Smz0zwAELQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1Smz0zwAELQ.mp4/1Smz0zwAELQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1Smz0zwAELQ.m3u8/1Smz0zwAELQ.m3u8"}, "slug": "psychoactive-drugs-stimulants", "video_id": "1Smz0zwAELQ", "youtube_id": "1Smz0zwAELQ", "readable_id": "psychoactive-drugs-stimulants"}, "n2kUpKP18z8": {"duration": 210, "path": "khan/test-prep/mcat/social-inequality/social-class/intersectionality/", "keywords": "", "id": "n2kUpKP18z8", "title": "Intersectionality", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n2kUpKP18z8.mp4/n2kUpKP18z8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n2kUpKP18z8.mp4/n2kUpKP18z8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n2kUpKP18z8.m3u8/n2kUpKP18z8.m3u8"}, "slug": "intersectionality", "video_id": "n2kUpKP18z8", "youtube_id": "n2kUpKP18z8", "readable_id": "intersectionality"}, "6OvhLPS7rj4": {"duration": 407, "path": "khan/math/probability/regression/regression-correlation/squared-error-of-regression-line/", "keywords": "squared, error, regression, line, least, CC_8_SP_2, CC_8_SP_3", "id": "6OvhLPS7rj4", "title": "Squared error of regression line", "description": "Introduction to the idea that one can find a line that minimizes the squared distances to the points", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6OvhLPS7rj4.mp4/6OvhLPS7rj4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6OvhLPS7rj4.mp4/6OvhLPS7rj4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6OvhLPS7rj4.m3u8/6OvhLPS7rj4.m3u8"}, "slug": "squared-error-of-regression-line", "video_id": "6OvhLPS7rj4", "youtube_id": "6OvhLPS7rj4", "readable_id": "squared-error-of-regression-line"}, "jaizi_1IB5c": {"duration": 392, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/absolute-value-equations/absolute-value-equation-example-2/", "keywords": "U02_L2_T2_we2, absolute, value, equation, CC_6_NS_7_c, CC_8_EE_7, CC_8_EE_7_a", "id": "jaizi_1IB5c", "title": "Absolute value equation example 2", "description": "Example of solving an absolute value equation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jaizi_1IB5c.mp4/jaizi_1IB5c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jaizi_1IB5c.mp4/jaizi_1IB5c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jaizi_1IB5c.m3u8/jaizi_1IB5c.m3u8"}, "slug": "absolute-value-equation-example-2", "video_id": "jaizi_1IB5c", "youtube_id": "jaizi_1IB5c", "readable_id": "absolute-value-equation-example-2"}, "ErHFQUhZ94I": {"duration": 106, "path": "khan/math/algebra-basics/core-algebra-foundations/operations-with-decimals/adding-decimals-example-2/", "keywords": "", "id": "ErHFQUhZ94I", "title": "Adding decimals: example 2", "description": "Let's practice another adding decimals problem: 0.822 plus 5.65. We'll do it together.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ErHFQUhZ94I.mp4/ErHFQUhZ94I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ErHFQUhZ94I.mp4/ErHFQUhZ94I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ErHFQUhZ94I.m3u8/ErHFQUhZ94I.m3u8"}, "slug": "adding-decimals-example-2", "video_id": "ErHFQUhZ94I", "youtube_id": "ErHFQUhZ94I", "readable_id": "adding-decimals-example-2"}, "1lvyCZsP_Sw": {"duration": 419, "path": "khan/test-prep/mcat/cells/prokaryotes-bacteria/bacterial-reproduction-bacterial-growth-curve/", "keywords": "", "id": "1lvyCZsP_Sw", "title": "Bacterial reproduction - Bacterial growth curve", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1lvyCZsP_Sw.mp4/1lvyCZsP_Sw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1lvyCZsP_Sw.mp4/1lvyCZsP_Sw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1lvyCZsP_Sw.m3u8/1lvyCZsP_Sw.m3u8"}, "slug": "bacterial-reproduction-bacterial-growth-curve", "video_id": "1lvyCZsP_Sw", "youtube_id": "1lvyCZsP_Sw", "readable_id": "bacterial-reproduction-bacterial-growth-curve"}, "eTWCARmrzJ0": {"duration": 260, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/fancier-logarithm-expressions/", "keywords": "", "id": "eTWCARmrzJ0", "title": "Fancier logarithm expressions", "description": "Examples of logarithms that evaluate to fractional and negative values.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eTWCARmrzJ0.mp4/eTWCARmrzJ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eTWCARmrzJ0.mp4/eTWCARmrzJ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eTWCARmrzJ0.m3u8/eTWCARmrzJ0.m3u8"}, "slug": "fancier-logarithm-expressions", "video_id": "eTWCARmrzJ0", "youtube_id": "eTWCARmrzJ0", "readable_id": "fancier-logarithm-expressions"}, "tpjVmLIUWCo": {"duration": 686, "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/acute-complications-of-diabetes-diabetic-ketoacidosis/", "keywords": "", "id": "tpjVmLIUWCo", "title": "Acute complications of diabetes - Diabetic ketoacidosis", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tpjVmLIUWCo.mp4/tpjVmLIUWCo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tpjVmLIUWCo.mp4/tpjVmLIUWCo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tpjVmLIUWCo.m3u8/tpjVmLIUWCo.m3u8"}, "slug": "acute-complications-of-diabetes-diabetic-ketoacidosis", "video_id": "tpjVmLIUWCo", "youtube_id": "tpjVmLIUWCo", "readable_id": "acute-complications-of-diabetes-diabetic-ketoacidosis"}, "1s6G4iCiIHA": {"duration": 104, "path": "khan/partner-content/exploratorium/light-and-color/cd-spectroscope/cd-spectroscope-explained/", "keywords": "", "id": "1s6G4iCiIHA", "title": "To do and notice: See the true colors", "description": "Point your CD spectroscope at different light sources to see their true colors! You might even get lucky and reveal some Fraunhofer lines (read the complete activity guide for more information).\u00a0Safety note: never point your CD spectroscope directly at the sun.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1s6G4iCiIHA.mp4/1s6G4iCiIHA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1s6G4iCiIHA.mp4/1s6G4iCiIHA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1s6G4iCiIHA.m3u8/1s6G4iCiIHA.m3u8"}, "slug": "cd-spectroscope-explained", "video_id": "1s6G4iCiIHA", "youtube_id": "1s6G4iCiIHA", "readable_id": "cd-spectroscope-explained"}, "atI4QH2acuw": {"duration": 296, "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/optional-calculus-proof-to-show-that-mr-has-twice-slope-of-demand/", "keywords": "microeconomics", "id": "atI4QH2acuw", "title": "Optional calculus proof to show that MR has twice slope of demand", "description": "Using some basic calculus to show that marginal revenue has twice the slope of the demand curve for a monopolist", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/atI4QH2acuw.mp4/atI4QH2acuw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/atI4QH2acuw.mp4/atI4QH2acuw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/atI4QH2acuw.m3u8/atI4QH2acuw.m3u8"}, "slug": "optional-calculus-proof-to-show-that-mr-has-twice-slope-of-demand", "video_id": "atI4QH2acuw", "youtube_id": "atI4QH2acuw", "readable_id": "optional-calculus-proof-to-show-that-mr-has-twice-slope-of-demand"}, "bekNKJoxYbQ": {"duration": 843, "path": "khan/math/probability/statistics-inferential/confidence-intervals/confidence-interval-1/", "keywords": "inferential, statistics, population, sample, distribution, mean, confidence, interval", "id": "bekNKJoxYbQ", "title": "Confidence interval 1", "description": "Estimating the probability that the true population mean lies within a range around a sample mean.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bekNKJoxYbQ.mp4/bekNKJoxYbQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bekNKJoxYbQ.mp4/bekNKJoxYbQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bekNKJoxYbQ.m3u8/bekNKJoxYbQ.m3u8"}, "slug": "confidence-interval-1", "video_id": "bekNKJoxYbQ", "youtube_id": "bekNKJoxYbQ", "readable_id": "confidence-interval-1"}, "ithdrJuSj3A": {"duration": 457, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/cardiomyopathy-treatment/", "keywords": "", "id": "ithdrJuSj3A", "title": "Cardiomyopathy treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ithdrJuSj3A.mp4/ithdrJuSj3A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ithdrJuSj3A.mp4/ithdrJuSj3A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ithdrJuSj3A.m3u8/ithdrJuSj3A.m3u8"}, "slug": "cardiomyopathy-treatment", "video_id": "ithdrJuSj3A", "youtube_id": "ithdrJuSj3A", "readable_id": "cardiomyopathy-treatment"}, "C6RFvROskM8": {"duration": 480, "path": "khan/test-prep/mcat/society-and-culture/social-structures/rational-choice-exchange/", "keywords": "", "id": "C6RFvROskM8", "title": "Rational choice-exchange theory", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C6RFvROskM8.mp4/C6RFvROskM8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C6RFvROskM8.mp4/C6RFvROskM8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C6RFvROskM8.m3u8/C6RFvROskM8.m3u8"}, "slug": "rational-choice-exchange", "video_id": "C6RFvROskM8", "youtube_id": "C6RFvROskM8", "readable_id": "rational-choice-exchange"}, "v3gdX07Q6qE": {"duration": 182, "path": "khan/math/recreational-math/math-warmup/arithmetic-warmups/baseten-warmup/", "keywords": "", "id": "v3gdX07Q6qE", "title": "Place value warmup", "description": "Learn about place value using a toy with beads (an abacus).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v3gdX07Q6qE.mp4/v3gdX07Q6qE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v3gdX07Q6qE.mp4/v3gdX07Q6qE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v3gdX07Q6qE.m3u8/v3gdX07Q6qE.m3u8"}, "slug": "baseten-warmup", "video_id": "v3gdX07Q6qE", "youtube_id": "v3gdX07Q6qE", "readable_id": "baseten-warmup"}, "IDkhHTjlg0M": {"duration": 599, "path": "khan/test-prep/gmat/problem-solving/gmat-math-44/", "keywords": "gmat, math, problem, solving", "id": "IDkhHTjlg0M", "title": "GMAT: Math 44", "description": "210-213, pg. 181", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IDkhHTjlg0M.mp4/IDkhHTjlg0M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IDkhHTjlg0M.mp4/IDkhHTjlg0M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IDkhHTjlg0M.m3u8/IDkhHTjlg0M.m3u8"}, "slug": "gmat-math-44", "video_id": "IDkhHTjlg0M", "youtube_id": "IDkhHTjlg0M", "readable_id": "gmat-math-44"}, "9RYCKd6Ac2U": {"duration": 684, "path": "khan/test-prep/mcat/behavior/psychological-disorders/anxiety-disorders-and-obsessive-compulsive-disorder/", "keywords": "Obsessive-compulsive Disorder (Disease Or Medical Condition),Anxiety Disorder (Disease Or Medical Condition),Anxiety (Symptom),Compulsive Behavior (Symptom),Mental Illness (Disease Or Medical Condition)", "id": "9RYCKd6Ac2U", "title": "Anxiety disorders and obsessive compulsive disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9RYCKd6Ac2U.mp4/9RYCKd6Ac2U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9RYCKd6Ac2U.mp4/9RYCKd6Ac2U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9RYCKd6Ac2U.m3u8/9RYCKd6Ac2U.m3u8"}, "slug": "anxiety-disorders-and-obsessive-compulsive-disorder", "video_id": "9RYCKd6Ac2U", "youtube_id": "9RYCKd6Ac2U", "readable_id": "anxiety-disorders-and-obsessive-compulsive-disorder"}, "DDkn5AMXoAU": {"duration": 121, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p3-easier/", "keywords": "", "id": "DDkn5AMXoAU", "title": "Radicals and rational exponents \u2014 Basic example", "description": "Watch Sal work through a basic Radicals and rational exponents problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DDkn5AMXoAU.mp4/DDkn5AMXoAU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DDkn5AMXoAU.mp4/DDkn5AMXoAU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DDkn5AMXoAU.m3u8/DDkn5AMXoAU.m3u8"}, "slug": "sat-math-p3-easier", "video_id": "DDkn5AMXoAU", "youtube_id": "DDkn5AMXoAU", "readable_id": "sat-math-p3-easier"}, "Hxk6GCKUiZI": {"duration": 601, "path": "khan/test-prep/mcat/behavior/theories-personality/trait-theory/", "keywords": "trait theory", "id": "Hxk6GCKUiZI", "title": "Trait theory", "description": "Learn how our traits make up our personality by taking a look at different psychologists' perspectives in how the Trait Theory came to be. By Shreena Desai.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hxk6GCKUiZI.mp4/Hxk6GCKUiZI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hxk6GCKUiZI.mp4/Hxk6GCKUiZI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hxk6GCKUiZI.m3u8/Hxk6GCKUiZI.m3u8"}, "slug": "trait-theory", "video_id": "Hxk6GCKUiZI", "youtube_id": "Hxk6GCKUiZI", "readable_id": "trait-theory"}, "9BNkmfHYYYI": {"duration": 396, "path": "khan/science/physics/newton-gravitation/gravity-newtonian/space-station-speed-in-orbit/", "keywords": "centripetal, acceleration", "id": "9BNkmfHYYYI", "title": "Space station speed in orbit", "description": "Speed necessary for the space station to stay in orbit", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9BNkmfHYYYI.mp4/9BNkmfHYYYI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9BNkmfHYYYI.mp4/9BNkmfHYYYI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9BNkmfHYYYI.m3u8/9BNkmfHYYYI.m3u8"}, "slug": "space-station-speed-in-orbit", "video_id": "9BNkmfHYYYI", "youtube_id": "9BNkmfHYYYI", "readable_id": "space-station-speed-in-orbit"}, "6Sy4E_8Psos": {"duration": 442, "path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-28-31/", "keywords": "CAHSEE, practice, california, high, school, exit, examination", "id": "6Sy4E_8Psos", "title": "CAHSEE practice: Problems 28-31", "description": "CAHSEE Practice: Problems 28-31", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6Sy4E_8Psos.mp4/6Sy4E_8Psos.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6Sy4E_8Psos.mp4/6Sy4E_8Psos.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6Sy4E_8Psos.m3u8/6Sy4E_8Psos.m3u8"}, "slug": "cahsee-practice-problems-28-31", "video_id": "6Sy4E_8Psos", "youtube_id": "6Sy4E_8Psos", "readable_id": "cahsee-practice-problems-28-31"}, "uEhRqiSA4ko": {"duration": 246, "path": "khan/partner-content/wi-phi/critical-thinking/fallacy-of-division/", "keywords": "", "id": "uEhRqiSA4ko", "title": "Fallacies: Fallacy of Division", "description": "In this video, Paul Henne describes the fallacy of division, the informal fallacy that arises when we assume that the parts of some whole must have the same properties as the whole they make up. He also discusses why water molecules aren't wet.\u00a0\n\nSpeaker: Paul Henne", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uEhRqiSA4ko.mp4/uEhRqiSA4ko.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uEhRqiSA4ko.mp4/uEhRqiSA4ko.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uEhRqiSA4ko.m3u8/uEhRqiSA4ko.m3u8"}, "slug": "fallacy-of-division", "video_id": "uEhRqiSA4ko", "youtube_id": "uEhRqiSA4ko", "readable_id": "fallacy-of-division"}, "PpUWpxAb39w": {"duration": 310, "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex2-part-1-parameterizing-the-surface/", "keywords": "surface, integral, calculus", "id": "PpUWpxAb39w", "title": "Surface integral ex2 part 1: Parameterizing the surface", "description": "Parametrizing a surface that can be explictly made a function of x and y.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PpUWpxAb39w.mp4/PpUWpxAb39w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PpUWpxAb39w.mp4/PpUWpxAb39w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PpUWpxAb39w.m3u8/PpUWpxAb39w.m3u8"}, "slug": "surface-integral-ex2-part-1-parameterizing-the-surface", "video_id": "PpUWpxAb39w", "youtube_id": "PpUWpxAb39w", "readable_id": "surface-integral-ex2-part-1-parameterizing-the-surface"}, "lsXcKgjg8Hs": {"duration": 683, "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/chilling-water-problem/", "keywords": "chemistry, states, phase, water, melting, fusion", "id": "lsXcKgjg8Hs", "title": "Chilling water problem", "description": "How much ice at -10 degrees C is necessary to get 500 g of water down to 0 degrees C?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lsXcKgjg8Hs.mp4/lsXcKgjg8Hs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lsXcKgjg8Hs.mp4/lsXcKgjg8Hs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lsXcKgjg8Hs.m3u8/lsXcKgjg8Hs.m3u8"}, "slug": "chilling-water-problem", "video_id": "lsXcKgjg8Hs", "youtube_id": "lsXcKgjg8Hs", "readable_id": "chilling-water-problem"}, "3CjCAeGhtHA": {"duration": 595, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/diagnosing-hiv-concepts-and-tests/", "keywords": "HIV (Disease Cause),Health (Industry),Diagnosis Of HIV/AIDS", "id": "3CjCAeGhtHA", "title": "Diagnosing HIV - Concepts and tests", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3CjCAeGhtHA.mp4/3CjCAeGhtHA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3CjCAeGhtHA.mp4/3CjCAeGhtHA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3CjCAeGhtHA.m3u8/3CjCAeGhtHA.m3u8"}, "slug": "diagnosing-hiv-concepts-and-tests", "video_id": "3CjCAeGhtHA", "youtube_id": "3CjCAeGhtHA", "readable_id": "diagnosing-hiv-concepts-and-tests"}, "FtxmFlMLYRI": {"duration": 229, "path": "khan/math/recreational-math/vi-hart/pi-tau/a-song-about-a-circle-constant/", "keywords": "tau, pi, circles, tau day, song, math", "id": "FtxmFlMLYRI", "title": "A song about a circle constant", "description": "Happy Tau Day! This is a song about Tau! Other Tau things you should see:Pi is (still) Wrong: http://youtu.be/jG7vhMMXagQ What Tau Sounds Like: http://youtu.be/3174T-3-59QThe Tau Manifesto: http://tauday.com/", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FtxmFlMLYRI.mp4/FtxmFlMLYRI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FtxmFlMLYRI.mp4/FtxmFlMLYRI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FtxmFlMLYRI.m3u8/FtxmFlMLYRI.m3u8"}, "slug": "a-song-about-a-circle-constant", "video_id": "FtxmFlMLYRI", "youtube_id": "FtxmFlMLYRI", "readable_id": "a-song-about-a-circle-constant"}, "uhqIh7wXwS4": {"duration": 132, "path": "khan/partner-content/exploratorium/expl-sound/light-to-sound/received/", "keywords": "", "id": "uhqIh7wXwS4", "title": "Build and test the receiver", "description": "A solar cell connected to a speaker converts the light into sound.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uhqIh7wXwS4.mp4/uhqIh7wXwS4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uhqIh7wXwS4.mp4/uhqIh7wXwS4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uhqIh7wXwS4.m3u8/uhqIh7wXwS4.m3u8"}, "slug": "received", "video_id": "uhqIh7wXwS4", "youtube_id": "uhqIh7wXwS4", "readable_id": "received"}, "rTKdqvOZcQ4": {"duration": 179, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-travelers-diarrhea/", "keywords": "", "id": "rTKdqvOZcQ4", "title": "What is traveler's diarrhea?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rTKdqvOZcQ4.mp4/rTKdqvOZcQ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rTKdqvOZcQ4.mp4/rTKdqvOZcQ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rTKdqvOZcQ4.m3u8/rTKdqvOZcQ4.m3u8"}, "slug": "what-is-travelers-diarrhea", "video_id": "rTKdqvOZcQ4", "youtube_id": "rTKdqvOZcQ4", "readable_id": "what-is-travelers-diarrhea"}, "T2mFyPxL-fU": {"duration": 77, "path": "khan/computing/computer-programming/html-js-jquery/jquery-intro/what-is-jquery/", "keywords": "JQuery (Software),JavaScript (Programming Language)", "id": "T2mFyPxL-fU", "title": "What is jQuery?", "description": "Want to keep learning? Keep going with our course on Khan Academy!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T2mFyPxL-fU.mp4/T2mFyPxL-fU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T2mFyPxL-fU.mp4/T2mFyPxL-fU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T2mFyPxL-fU.m3u8/T2mFyPxL-fU.m3u8"}, "slug": "what-is-jquery", "video_id": "T2mFyPxL-fU", "youtube_id": "T2mFyPxL-fU", "readable_id": "what-is-jquery"}, "k1iHDu9GrJE": {"duration": 726, "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-tutorial/visualizing-average-costs-and-marginal-costs-as-slope/", "keywords": "marginal, cost, microeconomics", "id": "k1iHDu9GrJE", "title": "Visualizing average costs and marginal costs as slope", "description": "Graphing variable cost, fixed cost and total cost", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/k1iHDu9GrJE.mp4/k1iHDu9GrJE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/k1iHDu9GrJE.mp4/k1iHDu9GrJE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/k1iHDu9GrJE.m3u8/k1iHDu9GrJE.m3u8"}, "slug": "visualizing-average-costs-and-marginal-costs-as-slope", "video_id": "k1iHDu9GrJE", "youtube_id": "k1iHDu9GrJE", "readable_id": "visualizing-average-costs-and-marginal-costs-as-slope"}, "pr-u4LCFYEY": {"duration": 624, "path": "khan/economics-finance-domain/core-finance/derivative-securities/black-scholes/introduction-to-the-black-scholes-formula/", "keywords": "", "id": "pr-u4LCFYEY", "title": "Introduction to the Black-Scholes formula", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pr-u4LCFYEY.mp4/pr-u4LCFYEY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pr-u4LCFYEY.mp4/pr-u4LCFYEY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pr-u4LCFYEY.m3u8/pr-u4LCFYEY.m3u8"}, "slug": "introduction-to-the-black-scholes-formula", "video_id": "pr-u4LCFYEY", "youtube_id": "pr-u4LCFYEY", "readable_id": "introduction-to-the-black-scholes-formula"}, "hPYOMKQlU1g": {"duration": 226, "path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/capitals-church-of-sant-miquel-early-13th-century/", "keywords": "NMAC, Barcelona, Art history, romanesque, smarthistory, middle ages, adam and eve", "id": "hPYOMKQlU1g", "title": "Historiated capitals, Church of Sant Miquel, Camarasa (Noguera)", "description": "Historiated capitals from the crossing of the Church of Sant Miquel of the castle of Camarasa (Noguera), early 13th century, stone, 77 x 1.65 x 77.5 cm (Museu Nacional d'Art de Catalunya, Palau Nacional, Barcelona).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hPYOMKQlU1g.mp4/hPYOMKQlU1g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hPYOMKQlU1g.mp4/hPYOMKQlU1g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hPYOMKQlU1g.m3u8/hPYOMKQlU1g.m3u8"}, "slug": "capitals-church-of-sant-miquel-early-13th-century", "video_id": "hPYOMKQlU1g", "youtube_id": "hPYOMKQlU1g", "readable_id": "capitals-church-of-sant-miquel-early-13th-century"}, "PlY3e_-9JUA": {"duration": 184, "path": "khan/math/geometry/triangle-properties/angle_bisectors/angle-bisector-theorem-examples/", "keywords": "Angle, Bisector, Theorem, Examples", "id": "PlY3e_-9JUA", "title": "Angle bisector theorem examples", "description": "Using the angle bisector theorem to solve for sides of a triangle", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PlY3e_-9JUA.mp4/PlY3e_-9JUA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PlY3e_-9JUA.mp4/PlY3e_-9JUA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PlY3e_-9JUA.m3u8/PlY3e_-9JUA.m3u8"}, "slug": "angle-bisector-theorem-examples", "video_id": "PlY3e_-9JUA", "youtube_id": "PlY3e_-9JUA", "readable_id": "angle-bisector-theorem-examples"}, "a67MCzUjUXA": {"duration": 712, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/inflammatory-bowel-disease-rn/inflammatory-bowel-disease-treatment/", "keywords": "Inflammatory Bowel Disease (Disease Or Medical Condition),Disease (Cause Of Death),Therapy (Literature Subject),Inflammation (Symptom),Health (Industry)", "id": "a67MCzUjUXA", "title": "Inflammatory bowel disease: Treatment", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a67MCzUjUXA.mp4/a67MCzUjUXA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a67MCzUjUXA.mp4/a67MCzUjUXA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a67MCzUjUXA.m3u8/a67MCzUjUXA.m3u8"}, "slug": "inflammatory-bowel-disease-treatment", "video_id": "a67MCzUjUXA", "youtube_id": "a67MCzUjUXA", "readable_id": "inflammatory-bowel-disease-treatment"}, "O1R4H3Ca82E": {"duration": 224, "path": "khan/math/pre-algebra/measurement/area-basics/measuring-the-same-rectangle-with-different-unit-squares/", "keywords": "", "id": "O1R4H3Ca82E", "title": "Measuring the same rectangle with different unit squares", "description": "Find area of a rectangle with different sized units.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O1R4H3Ca82E.mp4/O1R4H3Ca82E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O1R4H3Ca82E.mp4/O1R4H3Ca82E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O1R4H3Ca82E.m3u8/O1R4H3Ca82E.m3u8"}, "slug": "measuring-the-same-rectangle-with-different-unit-squares", "video_id": "O1R4H3Ca82E", "youtube_id": "O1R4H3Ca82E", "readable_id": "measuring-the-same-rectangle-with-different-unit-squares"}, "_Md5nli5OII": {"duration": 661, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/epiglottitis-diagnosis-and-treatment/", "keywords": "", "id": "_Md5nli5OII", "title": "Epiglottitis diagnosis and treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_Md5nli5OII.mp4/_Md5nli5OII.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_Md5nli5OII.mp4/_Md5nli5OII.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_Md5nli5OII.m3u8/_Md5nli5OII.m3u8"}, "slug": "epiglottitis-diagnosis-and-treatment", "video_id": "_Md5nli5OII", "youtube_id": "_Md5nli5OII", "readable_id": "epiglottitis-diagnosis-and-treatment"}, "wkP1TF16z1M": {"duration": 241, "path": "khan/humanities/art-asia/south-asia/hindu-art/ganesha/", "keywords": "India, Ganesha", "id": "wkP1TF16z1M", "title": "The making and worship of Ganesha statues in Maharashtra", "description": "The elephant-headed Ganesha is one of the most popular Hindu gods -- the creator and remover of obstacles. The main stone sculpture in the display was carved from schist around 800 years ago and was originally positioned on the outside of a temple in the eastern state of Orissa (recently renamed Odisha). The display brings this sculpture together with other more recent depictions of Ganesha created for different purposes. Among these are the temporary statues created every year for the Ganeshchaturthi festival in Mumbai, which are placed in public or domestic shrines before being immersed in water at the end of the celebrations.\u00a0\u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wkP1TF16z1M.mp4/wkP1TF16z1M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wkP1TF16z1M.mp4/wkP1TF16z1M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wkP1TF16z1M.m3u8/wkP1TF16z1M.m3u8"}, "slug": "ganesha", "video_id": "wkP1TF16z1M", "youtube_id": "wkP1TF16z1M", "readable_id": "ganesha"}, "rheO1tVyB0U": {"duration": 573, "path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/urination/", "keywords": "", "id": "rheO1tVyB0U", "title": "Urination", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rheO1tVyB0U.mp4/rheO1tVyB0U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rheO1tVyB0U.mp4/rheO1tVyB0U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rheO1tVyB0U.m3u8/rheO1tVyB0U.m3u8"}, "slug": "urination", "video_id": "rheO1tVyB0U", "youtube_id": "rheO1tVyB0U", "readable_id": "urination"}, "sv9CHsd546Q": {"duration": 176, "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-italian-la-belle-jardini-re-also-madonna-and-child-with-saint-john-the-baptist-1507/", "keywords": "raphael, madonna, National Gallery, Renaissance", "id": "sv9CHsd546Q", "title": "Raphael, La belle jardini\u00e8re", "description": "Raphael (Italian), La belle jardini\u00e8re (also, Madonna and Child with Saint John the Baptist), 1507, oil on panel, 48 \u00d7 31\u00bd in (122 \u00d7 80 cm, Mus\u00e9e du Louvre, Paris)\n\nSpeakers: Drs. Beth Harris and Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sv9CHsd546Q.mp4/sv9CHsd546Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sv9CHsd546Q.mp4/sv9CHsd546Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sv9CHsd546Q.m3u8/sv9CHsd546Q.m3u8"}, "slug": "raphael-italian-la-belle-jardini-re-also-madonna-and-child-with-saint-john-the-baptist-1507", "video_id": "sv9CHsd546Q", "youtube_id": "sv9CHsd546Q", "readable_id": "raphael-italian-la-belle-jardini-re-also-madonna-and-child-with-saint-john-the-baptist-1507"}, "fYzoiWIBjP8": {"duration": 622, "path": "khan/math/multivariable-calculus/partial_derivatives_topic/curl/curl-3/", "keywords": "vector, field, curl", "id": "fYzoiWIBjP8", "title": "Curl 3", "description": "More on curl", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fYzoiWIBjP8.mp4/fYzoiWIBjP8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fYzoiWIBjP8.mp4/fYzoiWIBjP8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fYzoiWIBjP8.m3u8/fYzoiWIBjP8.m3u8"}, "slug": "curl-3", "video_id": "fYzoiWIBjP8", "youtube_id": "fYzoiWIBjP8", "readable_id": "curl-3"}, "RPhaidW0dmY": {"duration": 261, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-number-mult-div-pre-alg/multiplying-mixed-numbers/", "keywords": "U02_L2_T1_we3, Multiplying, Mixed, Numbers, CC_5_NF_6", "id": "RPhaidW0dmY", "title": "How to multiply mixed numbers", "description": "Learn how to multiply two mixed numbers. The example used in this video is 1 and 3/4 multiplied by 7 and 1/5.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RPhaidW0dmY.mp4/RPhaidW0dmY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RPhaidW0dmY.mp4/RPhaidW0dmY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RPhaidW0dmY.m3u8/RPhaidW0dmY.m3u8"}, "slug": "multiplying-mixed-numbers", "video_id": "RPhaidW0dmY", "youtube_id": "RPhaidW0dmY", "readable_id": "multiplying-mixed-numbers"}, "3xpZprWSn_0": {"duration": 22, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/end-sentence-punctuation-basic/", "keywords": "education,online learning,learning,lessons", "id": "3xpZprWSn_0", "title": "Writing: End-of-sentence punctuation \u2014 Basic example", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0\u200bend-of-sentence punctuation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3xpZprWSn_0.mp4/3xpZprWSn_0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3xpZprWSn_0.mp4/3xpZprWSn_0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3xpZprWSn_0.m3u8/3xpZprWSn_0.m3u8"}, "slug": "end-sentence-punctuation-basic", "video_id": "3xpZprWSn_0", "youtube_id": "3xpZprWSn_0", "readable_id": "end-sentence-punctuation-basic"}, "DxkkAHnqlpY": {"duration": 568, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/supermassive-black-holes/", "keywords": "Super, massive, Black, Holes", "id": "DxkkAHnqlpY", "title": "Supermassive black holes", "description": "Supermassive Black Holes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DxkkAHnqlpY.mp4/DxkkAHnqlpY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DxkkAHnqlpY.mp4/DxkkAHnqlpY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DxkkAHnqlpY.m3u8/DxkkAHnqlpY.m3u8"}, "slug": "supermassive-black-holes", "video_id": "DxkkAHnqlpY", "youtube_id": "DxkkAHnqlpY", "readable_id": "supermassive-black-holes"}, "wwO6DjL_wFw": {"duration": 239, "path": "khan/math/early-math/cc-early-math-add-sub-1000/cc-early-math-add-ones-tens-hundreds/adding-ten-or-one-hundred/", "keywords": "", "id": "wwO6DjL_wFw", "title": "Adding ten or one hundred", "description": "Learn how to add 1, 10, or 100 to a number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wwO6DjL_wFw.mp4/wwO6DjL_wFw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wwO6DjL_wFw.mp4/wwO6DjL_wFw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wwO6DjL_wFw.m3u8/wwO6DjL_wFw.m3u8"}, "slug": "adding-ten-or-one-hundred", "video_id": "wwO6DjL_wFw", "youtube_id": "wwO6DjL_wFw", "readable_id": "adding-ten-or-one-hundred"}, "PtmzfpV6CDE": {"duration": 593, "path": "khan/computing/computer-science/informationtheory/moderninfotheory/how-do-we-measure-information-language-of-coins-10-12/", "keywords": "measure information", "id": "PtmzfpV6CDE", "title": "Measuring information", "description": "How can we quantify/measure an information source?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PtmzfpV6CDE.mp4/PtmzfpV6CDE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PtmzfpV6CDE.mp4/PtmzfpV6CDE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PtmzfpV6CDE.m3u8/PtmzfpV6CDE.m3u8"}, "slug": "how-do-we-measure-information-language-of-coins-10-12", "video_id": "PtmzfpV6CDE", "youtube_id": "PtmzfpV6CDE", "readable_id": "how-do-we-measure-information-language-of-coins-10-12"}, "Hpfs8uEo9WA": {"duration": 673, "path": "khan/humanities/history/crashcourse-worldhistory/what-happens-when-you-stay-put-2/crash-course-world-history-04/", "keywords": "crash course", "id": "Hpfs8uEo9WA", "title": "Ancient Egypt", "description": "In which John covers the long, long history of ancient Egypt, including the Old, Middle and New Kingdoms, and even a couple of intermediate periods. Learn about mummies, pharaohs, pyramids and the Nile with John Green.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hpfs8uEo9WA.mp4/Hpfs8uEo9WA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hpfs8uEo9WA.mp4/Hpfs8uEo9WA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hpfs8uEo9WA.m3u8/Hpfs8uEo9WA.m3u8"}, "slug": "crash-course-world-history-04", "video_id": "Hpfs8uEo9WA", "youtube_id": "Hpfs8uEo9WA", "readable_id": "crash-course-world-history-04"}, "yOgGhPIHnlA": {"duration": 700, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-16-why-target-rates-vs-money-supply/", "keywords": "money, supply, m0, m1, m2, interest, rate, federal, funds", "id": "yOgGhPIHnlA", "title": "Banking 16: Why target rates vs. money supply", "description": "The rationale for targeting interest rates instead of directly having a money supply target.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yOgGhPIHnlA.mp4/yOgGhPIHnlA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yOgGhPIHnlA.mp4/yOgGhPIHnlA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yOgGhPIHnlA.m3u8/yOgGhPIHnlA.m3u8"}, "slug": "banking-16-why-target-rates-vs-money-supply", "video_id": "yOgGhPIHnlA", "youtube_id": "yOgGhPIHnlA", "readable_id": "banking-16-why-target-rates-vs-money-supply"}, "IVHD9wGlbho": {"duration": 421, "path": "khan/science/biology/her/tree-of-life/human-prehistory-101-part-3-agriculture-rocks-our-world/", "keywords": "Khan, prehistory, part3", "id": "IVHD9wGlbho", "title": "Human prehistory 101 part 3: Agriculture rocks our world", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IVHD9wGlbho.mp4/IVHD9wGlbho.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IVHD9wGlbho.mp4/IVHD9wGlbho.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IVHD9wGlbho.m3u8/IVHD9wGlbho.m3u8"}, "slug": "human-prehistory-101-part-3-agriculture-rocks-our-world", "video_id": "IVHD9wGlbho", "youtube_id": "IVHD9wGlbho", "readable_id": "human-prehistory-101-part-3-agriculture-rocks-our-world"}, "CAnqu40RSbs": {"duration": 157, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h9-harder/", "keywords": "", "id": "CAnqu40RSbs", "title": "Graphing linear equations \u2014 Harder example", "description": "Watch Sal work through a harder Graphing linear equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CAnqu40RSbs.mp4/CAnqu40RSbs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CAnqu40RSbs.mp4/CAnqu40RSbs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CAnqu40RSbs.m3u8/CAnqu40RSbs.m3u8"}, "slug": "sat-math-h9-harder", "video_id": "CAnqu40RSbs", "youtube_id": "CAnqu40RSbs", "readable_id": "sat-math-h9-harder"}, "O1N2rENXq_Y": {"duration": 980, "path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/role-of-phagocytes-in-innate-or-nonspecific-immunity/", "keywords": "immunology, phagocyte, neutrophil, macrophage, dendritic", "id": "O1N2rENXq_Y", "title": "Role of phagocytes in innate or nonspecific immunity", "description": "Role of phagocytes in innate or nonspecific immunity. Neutrophils, macrophages, and dendritic cells. MHC II.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O1N2rENXq_Y.mp4/O1N2rENXq_Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O1N2rENXq_Y.mp4/O1N2rENXq_Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O1N2rENXq_Y.m3u8/O1N2rENXq_Y.m3u8"}, "slug": "role-of-phagocytes-in-innate-or-nonspecific-immunity", "video_id": "O1N2rENXq_Y", "youtube_id": "O1N2rENXq_Y", "readable_id": "role-of-phagocytes-in-innate-or-nonspecific-immunity"}, "0emD1AmfdjY": {"duration": 491, "path": "khan/test-prep/mcat/cells/cell-membrane-overview/cell-membrane-proteins/", "keywords": "", "id": "0emD1AmfdjY", "title": "Cell membrane proteins", "description": "Learn about the different types of proteins that exist on the cell membrane. By William Tsai.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0emD1AmfdjY.mp4/0emD1AmfdjY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0emD1AmfdjY.mp4/0emD1AmfdjY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0emD1AmfdjY.m3u8/0emD1AmfdjY.m3u8"}, "slug": "cell-membrane-proteins", "video_id": "0emD1AmfdjY", "youtube_id": "0emD1AmfdjY", "readable_id": "cell-membrane-proteins"}, "KgoXx_58QyQ": {"duration": 209, "path": "khan/math/pre-algebra/rates-and-ratios/unit_conversion/solving-application-problems-involving-units-of-volume/", "keywords": "U06_L1_T3_we3, Solving, application, problems, involving, units, of, volume, CC_3_MD_2, CC_4_MD_1, CC_4_MD_2, CC_5_MD_1, CC_5_MD_3, CC_5_MD_5, CC_5_MD_5_c, CC_6_RP_3_d, CC_7_G_6", "id": "KgoXx_58QyQ", "title": "Unit measurement word problem: volume (US customary)", "description": "Pints or gallons? Gallons or quarts? Confused? You won't be for long. This unit measurement word problem gets us thinking about moving between these units of volume.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KgoXx_58QyQ.mp4/KgoXx_58QyQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KgoXx_58QyQ.mp4/KgoXx_58QyQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KgoXx_58QyQ.m3u8/KgoXx_58QyQ.m3u8"}, "slug": "solving-application-problems-involving-units-of-volume", "video_id": "KgoXx_58QyQ", "youtube_id": "KgoXx_58QyQ", "readable_id": "solving-application-problems-involving-units-of-volume"}, "I1rULaaHZ6M": {"duration": 466, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-chancroid/", "keywords": "", "id": "I1rULaaHZ6M", "title": "What is chancroid?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I1rULaaHZ6M.mp4/I1rULaaHZ6M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I1rULaaHZ6M.mp4/I1rULaaHZ6M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I1rULaaHZ6M.m3u8/I1rULaaHZ6M.m3u8"}, "slug": "what-is-chancroid", "video_id": "I1rULaaHZ6M", "youtube_id": "I1rULaaHZ6M", "readable_id": "what-is-chancroid"}, "vrmKqH8d1RM": {"duration": 427, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/somatosensory-tracts/", "keywords": "MCAT", "id": "vrmKqH8d1RM", "title": "Somatosensory tracts", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vrmKqH8d1RM.mp4/vrmKqH8d1RM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vrmKqH8d1RM.mp4/vrmKqH8d1RM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vrmKqH8d1RM.m3u8/vrmKqH8d1RM.m3u8"}, "slug": "somatosensory-tracts", "video_id": "vrmKqH8d1RM", "youtube_id": "vrmKqH8d1RM", "readable_id": "somatosensory-tracts"}, "X1h5kr55SZg": {"duration": 368, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia/lung-abscess/", "keywords": "", "id": "X1h5kr55SZg", "title": "Pulmonary abscess", "description": "Pulmonary abscesses occur when part of the lung tissue dies (caused by damage or infection) and gets trapped in a layer of hard tissue in the lung. Learn what causes abscesses, how they are diagnosed, and how health professionals treat them.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X1h5kr55SZg.mp4/X1h5kr55SZg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X1h5kr55SZg.mp4/X1h5kr55SZg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X1h5kr55SZg.m3u8/X1h5kr55SZg.m3u8"}, "slug": "lung-abscess", "video_id": "X1h5kr55SZg", "youtube_id": "X1h5kr55SZg", "readable_id": "lung-abscess"}, "j511hg7Hlbg": {"duration": 616, "path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/integrating-factors-1/", "keywords": "integrating, factor, exact, differential, equation", "id": "j511hg7Hlbg", "title": "Integrating factors 1", "description": "Using an integrating factor to make a differential equation exact", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j511hg7Hlbg.mp4/j511hg7Hlbg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j511hg7Hlbg.mp4/j511hg7Hlbg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j511hg7Hlbg.m3u8/j511hg7Hlbg.m3u8"}, "slug": "integrating-factors-1", "video_id": "j511hg7Hlbg", "youtube_id": "j511hg7Hlbg", "readable_id": "integrating-factors-1"}, "pLW8x4XsszY": {"duration": 255, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/ocean-acidification/ocean-acidification-observe/", "keywords": "Climate Change (Website Category),global warming,Chemistry (Field Of Study),Ocean Acidification,science,experiment,NGSS,diffusion,atmosphere", "id": "pLW8x4XsszY", "title": "What\u2019s going on: Creating carbon dioxide gas that diffuses into liquid", "description": "Learn about passive diffusion and discover how this chemical process relates to big changes in our oceans.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pLW8x4XsszY.mp4/pLW8x4XsszY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pLW8x4XsszY.mp4/pLW8x4XsszY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pLW8x4XsszY.m3u8/pLW8x4XsszY.m3u8"}, "slug": "ocean-acidification-observe", "video_id": "pLW8x4XsszY", "youtube_id": "pLW8x4XsszY", "readable_id": "ocean-acidification-observe"}, "JEXhbd0JOWk": {"duration": 588, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-bumper-switches/", "keywords": "bit-zee, bumper switches, arduino, hack, make, diy", "id": "JEXhbd0JOWk", "title": "Bumper switches", "description": "In this video we create and wire Bit-zee's bumper switches", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JEXhbd0JOWk.mp4/JEXhbd0JOWk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JEXhbd0JOWk.mp4/JEXhbd0JOWk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JEXhbd0JOWk.m3u8/JEXhbd0JOWk.m3u8"}, "slug": "bit-zee-s-bumper-switches", "video_id": "JEXhbd0JOWk", "youtube_id": "JEXhbd0JOWk", "readable_id": "bit-zee-s-bumper-switches"}, "2EciWH-1ya4": {"duration": 318, "path": "khan/humanities/medieval-world/latin-western-europe/gothic1/birth-of-the-gothic-abbot-suger-and-the-ambulatory-in-the-basilica-of-st-denis-1140-44/", "keywords": "Smarthistory, Art History, Khan Academy, Abbot Suger, Saint Denis, Paris, Gothic, Architecture", "id": "2EciWH-1ya4", "title": "Birth of the Gothic: Abbot Suger and the ambulatory at St. Denis", "description": "Ambulatory, Basilica of Saint Denis, Paris, 1140-44.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2EciWH-1ya4.mp4/2EciWH-1ya4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2EciWH-1ya4.mp4/2EciWH-1ya4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2EciWH-1ya4.m3u8/2EciWH-1ya4.m3u8"}, "slug": "birth-of-the-gothic-abbot-suger-and-the-ambulatory-in-the-basilica-of-st-denis-1140-44", "video_id": "2EciWH-1ya4", "youtube_id": "2EciWH-1ya4", "readable_id": "birth-of-the-gothic-abbot-suger-and-the-ambulatory-in-the-basilica-of-st-denis-1140-44"}, "IDLCwhijNG4": {"duration": 474, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pleural-effusion/what-is-pleural-effusion/", "keywords": "", "id": "IDLCwhijNG4", "title": "What is a pleural effusion?", "description": "Pleural effusions are when excess fluid get caught between two layers of tissue (the visceral and parietal pleurae) surrounding the lungs. This fluid can build up over time, taking up space in the lung and impairing a person\u2019s ability to breath. Learn about the signs and symptoms of pleural effusions such as chest pain, shortness of breath, and dry coughing.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IDLCwhijNG4.mp4/IDLCwhijNG4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IDLCwhijNG4.mp4/IDLCwhijNG4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IDLCwhijNG4.m3u8/IDLCwhijNG4.m3u8"}, "slug": "what-is-pleural-effusion", "video_id": "IDLCwhijNG4", "youtube_id": "IDLCwhijNG4", "readable_id": "what-is-pleural-effusion"}, "1CMDS4-PKKQ": {"duration": 671, "path": "khan/math/multivariable-calculus/partial_derivatives_topic/partial_derivatives/partial-derivatives/", "keywords": "partial, derivative", "id": "1CMDS4-PKKQ", "title": "Partial derivatives", "description": "Introduction to partial derivatives.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1CMDS4-PKKQ.mp4/1CMDS4-PKKQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1CMDS4-PKKQ.mp4/1CMDS4-PKKQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1CMDS4-PKKQ.m3u8/1CMDS4-PKKQ.m3u8"}, "slug": "partial-derivatives", "video_id": "1CMDS4-PKKQ", "youtube_id": "1CMDS4-PKKQ", "readable_id": "partial-derivatives"}, "OQpFFiLdE0E": {"duration": 940, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/action-potentials-in-pacemaker-cells/", "keywords": "", "id": "OQpFFiLdE0E", "title": "Action potentials in pacemaker cells", "description": "Find out how the pacemaker cells use the movement of sodium, calcium, and potassium to get your heart beating! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OQpFFiLdE0E.mp4/OQpFFiLdE0E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OQpFFiLdE0E.mp4/OQpFFiLdE0E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OQpFFiLdE0E.m3u8/OQpFFiLdE0E.m3u8"}, "slug": "action-potentials-in-pacemaker-cells", "video_id": "OQpFFiLdE0E", "youtube_id": "OQpFFiLdE0E", "readable_id": "action-potentials-in-pacemaker-cells"}, "cK1egPBjJXE": {"duration": 106, "path": "khan/math/pre-algebra/exponents-radicals/orders-of-magnitude/orders-of-magnitude-exercise-example-1/", "keywords": "", "id": "cK1egPBjJXE", "title": "Orders of magnitude exercise example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cK1egPBjJXE.mp4/cK1egPBjJXE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cK1egPBjJXE.mp4/cK1egPBjJXE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cK1egPBjJXE.m3u8/cK1egPBjJXE.m3u8"}, "slug": "orders-of-magnitude-exercise-example-1", "video_id": "cK1egPBjJXE", "youtube_id": "cK1egPBjJXE", "readable_id": "orders-of-magnitude-exercise-example-1"}, "aW0blf6lWQc": {"duration": 164, "path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/fragment/", "keywords": "authority, death, politics, sculpture, stone, youth, Africa", "id": "aW0blf6lWQc", "title": "Head of Tutankhamun from the Amarna Period of Egypt\u2019s New Kingdom", "description": "Met curator Nicholas Reeves on fragmented history in Head of Tutankhamun from the Amarna Period of Egypt\u2019s New Kingdom, c. 1336\u20131327 B.C.E.\n\nThis head is a fragment from a statue group that represented the god Amun seated on a throne with the young king Tutankhamun standing or kneeling in front of him. The king's figure was considerably smaller than that of the god, indicating his subordinate status in the presence of the deity. All that remains of Amun is his right hand, which touches the back of the king's crown in a gesture that signifies Tutankhamun's investiture as king. During coronation rituals, various types of crowns were put on the king's head. The type represented here\u2014probably a leather helmet with metal disks sewn onto it\u2014was generally painted blue, and is commonly called the \"blue crown.\" The ancient name was khepresh.\n\nStatue groups showing a king together with gods had been created since the Old Kingdom, and formal groups relating to the pharaoh's coronation were dedicated at Karnak by Hatshepsut and other rulers of Dynasty 18. The Metropolitan's head of Tutankhamun with the hand of Amun is special because of the intimacy with which the subject is treated. The face of the king expresses a touching youthful earnestness, and the hand of the god is raised toward his crown with gentle care.\n\nView this work on metmuseum.org.\u00a0\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit\u00a0Find an Educator Resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aW0blf6lWQc.mp4/aW0blf6lWQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aW0blf6lWQc.mp4/aW0blf6lWQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aW0blf6lWQc.m3u8/aW0blf6lWQc.m3u8"}, "slug": "fragment", "video_id": "aW0blf6lWQc", "youtube_id": "aW0blf6lWQc", "readable_id": "fragment"}, "NJsLHcL3Bvs": {"duration": 270, "path": "khan/test-prep/ap-art-history/south-east-se-asia/india-art/aam-stupa/", "keywords": "", "id": "NJsLHcL3Bvs", "title": "The stupa", "description": "A short documentary on the stupa, a hemispherical mound that represents the burial mound of the Buddha. Learn more about the stupa on\u00a0education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NJsLHcL3Bvs.mp4/NJsLHcL3Bvs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NJsLHcL3Bvs.mp4/NJsLHcL3Bvs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NJsLHcL3Bvs.m3u8/NJsLHcL3Bvs.m3u8"}, "slug": "aam-stupa", "video_id": "NJsLHcL3Bvs", "youtube_id": "NJsLHcL3Bvs", "readable_id": "aam-stupa"}, "-Bykx5cBKMI": {"duration": 164, "path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/paul-cezanne-approach-watercolor/", "keywords": "", "id": "-Bykx5cBKMI", "title": "Paul C\u00e9zanne's approach to watercolor", "description": "Learn how watercolors are created and how Paul C\u00e9zanne applied his unique approach to the medium by using pencil lines as an active part of composition, as exemplified by his Still Life. Love art? Follow us on Google+\u00a0at http://bit.ly/gettygoogleplus", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-Bykx5cBKMI.mp4/-Bykx5cBKMI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-Bykx5cBKMI.mp4/-Bykx5cBKMI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-Bykx5cBKMI.m3u8/-Bykx5cBKMI.m3u8"}, "slug": "paul-cezanne-approach-watercolor", "video_id": "-Bykx5cBKMI", "youtube_id": "-Bykx5cBKMI", "readable_id": "paul-cezanne-approach-watercolor"}, "lfIHzumEghQ": {"duration": 287, "path": "khan/test-prep/ap-art-history/south-east-se-asia/china-art/david-vases/", "keywords": "", "id": "lfIHzumEghQ", "title": "The David Vases", "description": "The David Vases, 1351 (Yuan dynasty), porcelain, cobalt and clear glaze, 63.6 x 20.7 cm each, Jingdezhen, Jiangxi province, China (British Museum)\n\n\u00a0\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lfIHzumEghQ.mp4/lfIHzumEghQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lfIHzumEghQ.mp4/lfIHzumEghQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lfIHzumEghQ.m3u8/lfIHzumEghQ.m3u8"}, "slug": "david-vases", "video_id": "lfIHzumEghQ", "youtube_id": "lfIHzumEghQ", "readable_id": "david-vases"}, "x3nTl9-xf58": {"duration": 128, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/syntax-basic/", "keywords": "education,online learning,learning,lessons", "id": "x3nTl9-xf58", "title": "Writing: Syntax \u2014 Basic example", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing syntax.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x3nTl9-xf58.mp4/x3nTl9-xf58.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x3nTl9-xf58.mp4/x3nTl9-xf58.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x3nTl9-xf58.m3u8/x3nTl9-xf58.m3u8"}, "slug": "syntax-basic", "video_id": "x3nTl9-xf58", "youtube_id": "x3nTl9-xf58", "readable_id": "syntax-basic"}, "Y2ed-g8Lpdc": {"duration": 662, "path": "khan/test-prep/iit-jee-subject/iit-jee/trigonometric-system-example/", "keywords": "2010, IIT, JEE, Paper, Problem, 55, Trigonometric, System", "id": "Y2ed-g8Lpdc", "title": "Trigonometric system example", "description": "2010 IIT JEE Paper 1 Problem 55 Trigonometric System", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y2ed-g8Lpdc.mp4/Y2ed-g8Lpdc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y2ed-g8Lpdc.mp4/Y2ed-g8Lpdc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y2ed-g8Lpdc.m3u8/Y2ed-g8Lpdc.m3u8"}, "slug": "trigonometric-system-example", "video_id": "Y2ed-g8Lpdc", "youtube_id": "Y2ed-g8Lpdc", "readable_id": "trigonometric-system-example"}, "0tXxFPHzFFI": {"duration": 270, "path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/comparison-test/", "keywords": "", "id": "0tXxFPHzFFI", "title": "Comparison test", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0tXxFPHzFFI.mp4/0tXxFPHzFFI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0tXxFPHzFFI.mp4/0tXxFPHzFFI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0tXxFPHzFFI.m3u8/0tXxFPHzFFI.m3u8"}, "slug": "comparison-test", "video_id": "0tXxFPHzFFI", "youtube_id": "0tXxFPHzFFI", "readable_id": "comparison-test"}, "K3XTsNlcDS8": {"duration": 156, "path": "khan/humanities/becoming-modern/avant-garde-france/realism/douard-manet-plum-brandy-c-1877/", "keywords": "smarthistory, Khan Academy, Manet, Impressionism, realism, Art History", "id": "K3XTsNlcDS8", "title": "Manet, Plum Brandy", "description": "\u00c9douard Manet, Plum Brandy, c. 1877, oil on canvas (National Gallery of Art)\n\nSpeakers: Dr. Steven Zucker, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K3XTsNlcDS8.mp4/K3XTsNlcDS8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K3XTsNlcDS8.mp4/K3XTsNlcDS8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K3XTsNlcDS8.m3u8/K3XTsNlcDS8.m3u8"}, "slug": "douard-manet-plum-brandy-c-1877", "video_id": "K3XTsNlcDS8", "youtube_id": "K3XTsNlcDS8", "readable_id": "douard-manet-plum-brandy-c-1877"}, "BlBQBOb0OQ4": {"duration": 605, "path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/reactivity-of-aldehydes-and-ketones/", "keywords": "", "id": "BlBQBOb0OQ4", "title": "Reactivity of aldehydes and ketones", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BlBQBOb0OQ4.mp4/BlBQBOb0OQ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BlBQBOb0OQ4.mp4/BlBQBOb0OQ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BlBQBOb0OQ4.m3u8/BlBQBOb0OQ4.m3u8"}, "slug": "reactivity-of-aldehydes-and-ketones", "video_id": "BlBQBOb0OQ4", "youtube_id": "BlBQBOb0OQ4", "readable_id": "reactivity-of-aldehydes-and-ketones"}, "byjmR7JBXKc": {"duration": 266, "path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-scale-drawings/scale-drawings-example/", "keywords": "", "id": "byjmR7JBXKc", "title": "Interpreting a scale drawing", "description": "Understand how a scale drawing is converted into real numbers using the scale factor.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/byjmR7JBXKc.mp4/byjmR7JBXKc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/byjmR7JBXKc.mp4/byjmR7JBXKc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/byjmR7JBXKc.m3u8/byjmR7JBXKc.m3u8"}, "slug": "scale-drawings-example", "video_id": "byjmR7JBXKc", "youtube_id": "byjmR7JBXKc", "readable_id": "scale-drawings-example"}, "pRIELoITIHI": {"duration": 929, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-basics-tutorial/cpi-index/", "keywords": "CPI, inflation, owner's, equivalent, rent, deflation", "id": "pRIELoITIHI", "title": "CPI index", "description": "Discussion of inflation, the CPI index and owners' equivalent rent.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pRIELoITIHI.mp4/pRIELoITIHI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pRIELoITIHI.mp4/pRIELoITIHI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pRIELoITIHI.m3u8/pRIELoITIHI.m3u8"}, "slug": "cpi-index", "video_id": "pRIELoITIHI", "youtube_id": "pRIELoITIHI", "readable_id": "cpi-index"}, "DR2DYe7PI74": {"duration": 116, "path": "khan/math/pre-algebra/fractions-pre-alg/decimals-fractions-pre-alg/converting-decimals-to-fractions-1-ex-1/", "keywords": "Converting, decimals, to, fractions, 1, ex", "id": "DR2DYe7PI74", "title": "Converting decimals to fractions example 1", "description": "Learn how to convert 0.15 into a fraction.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DR2DYe7PI74.mp4/DR2DYe7PI74.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DR2DYe7PI74.mp4/DR2DYe7PI74.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DR2DYe7PI74.m3u8/DR2DYe7PI74.m3u8"}, "slug": "converting-decimals-to-fractions-1-ex-1", "video_id": "DR2DYe7PI74", "youtube_id": "DR2DYe7PI74", "readable_id": "converting-decimals-to-fractions-1-ex-1"}, "-sSDb_wZqKQ": {"duration": 128, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/multistep-word-problems-tut/multistep-word-problems-example-3/", "keywords": "", "id": "-sSDb_wZqKQ", "title": "Multi-step word problem with addition, subtraction, and multiplication", "description": "Budgeting money is one of the most valuable math skills you'll learn. Practice with us as we figure out how much money is left after a cab fare.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-sSDb_wZqKQ.mp4/-sSDb_wZqKQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-sSDb_wZqKQ.mp4/-sSDb_wZqKQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-sSDb_wZqKQ.m3u8/-sSDb_wZqKQ.m3u8"}, "slug": "multistep-word-problems-example-3", "video_id": "-sSDb_wZqKQ", "youtube_id": "-sSDb_wZqKQ", "readable_id": "multistep-word-problems-example-3"}, "NOsnG2DkGKM": {"duration": 224, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/comparing_linear_functions/comparing-features-of-functions-4/", "keywords": "", "id": "NOsnG2DkGKM", "title": "Comparing linear functions word problems 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NOsnG2DkGKM.mp4/NOsnG2DkGKM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NOsnG2DkGKM.mp4/NOsnG2DkGKM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NOsnG2DkGKM.m3u8/NOsnG2DkGKM.m3u8"}, "slug": "comparing-features-of-functions-4", "video_id": "NOsnG2DkGKM", "youtube_id": "NOsnG2DkGKM", "readable_id": "comparing-features-of-functions-4"}, "_G9JwTwjulA": {"duration": 341, "path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-3a/", "keywords": "AP, advanced, placement, exam", "id": "_G9JwTwjulA", "title": "2011 Calculus BC free response #3a", "description": "Arc length of a function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_G9JwTwjulA.mp4/_G9JwTwjulA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_G9JwTwjulA.mp4/_G9JwTwjulA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_G9JwTwjulA.m3u8/_G9JwTwjulA.m3u8"}, "slug": "2011-calculus-bc-free-response-3a", "video_id": "_G9JwTwjulA", "youtube_id": "_G9JwTwjulA", "readable_id": "2011-calculus-bc-free-response-3a"}, "Q94h1W5H1Nk": {"duration": 141, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/warby-parker/warby-parker-2/", "keywords": "", "id": "Q94h1W5H1Nk", "title": "It was just mayhem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q94h1W5H1Nk.mp4/Q94h1W5H1Nk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q94h1W5H1Nk.mp4/Q94h1W5H1Nk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q94h1W5H1Nk.m3u8/Q94h1W5H1Nk.m3u8"}, "slug": "warby-parker-2", "video_id": "Q94h1W5H1Nk", "youtube_id": "Q94h1W5H1Nk", "readable_id": "warby-parker-2"}, "T_NdGA0CcXI": {"duration": 125, "path": "khan/partner-content/pixar/sets/sets1/set-3/", "keywords": "", "id": "T_NdGA0CcXI", "title": "3. Scaling", "description": "Next we need to explore the mathematics of scaling.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T_NdGA0CcXI.mp4/T_NdGA0CcXI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T_NdGA0CcXI.mp4/T_NdGA0CcXI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T_NdGA0CcXI.m3u8/T_NdGA0CcXI.m3u8"}, "slug": "set-3", "video_id": "T_NdGA0CcXI", "youtube_id": "T_NdGA0CcXI", "readable_id": "set-3"}, "PQyQadCqLAI": {"duration": 482, "path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/perceptual-organization/", "keywords": "", "id": "PQyQadCqLAI", "title": "Visual cues", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PQyQadCqLAI.mp4/PQyQadCqLAI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PQyQadCqLAI.mp4/PQyQadCqLAI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PQyQadCqLAI.m3u8/PQyQadCqLAI.m3u8"}, "slug": "perceptual-organization", "video_id": "PQyQadCqLAI", "youtube_id": "PQyQadCqLAI", "readable_id": "perceptual-organization"}, "9REPnibO4IQ": {"duration": 751, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/half-life/", "keywords": "chemistry, half-life", "id": "9REPnibO4IQ", "title": "Half-life and carbon dating", "description": "Carbon dating is a real-life example of a first-order reaction. This video explains\u00a0half-life in the context of radioactive decay.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9REPnibO4IQ.mp4/9REPnibO4IQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9REPnibO4IQ.mp4/9REPnibO4IQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9REPnibO4IQ.m3u8/9REPnibO4IQ.m3u8"}, "slug": "half-life", "video_id": "9REPnibO4IQ", "youtube_id": "9REPnibO4IQ", "readable_id": "half-life"}, "DAikW24_O0A": {"duration": 326, "path": "khan/math/pre-algebra/decimals-pre-alg/percent-word-probs-pre-alg/solving-percent-problems-3/", "keywords": "U05_L2_T1_we3, Solving, Percent, Problems, CC_6_RP_3_c", "id": "DAikW24_O0A", "title": "Percent word problem example 5", "description": "In this example, you working with us to find the number that is expressed as a given percentage.We'll create a simple algebraic equation to solve!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DAikW24_O0A.mp4/DAikW24_O0A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DAikW24_O0A.mp4/DAikW24_O0A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DAikW24_O0A.m3u8/DAikW24_O0A.m3u8"}, "slug": "solving-percent-problems-3", "video_id": "DAikW24_O0A", "youtube_id": "DAikW24_O0A", "readable_id": "solving-percent-problems-3"}, "__zy-oOLPug": {"duration": 927, "path": "khan/science/chemistry/chem-kinetics/reaction-rates/introduction-to-kinetics/", "keywords": "chemistry, kinetics", "id": "__zy-oOLPug", "title": "Introduction to kinetics", "description": "Kinetics, activation energy, activated complex and catalysts.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/__zy-oOLPug.mp4/__zy-oOLPug.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/__zy-oOLPug.mp4/__zy-oOLPug.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/__zy-oOLPug.m3u8/__zy-oOLPug.m3u8"}, "slug": "introduction-to-kinetics", "video_id": "__zy-oOLPug", "youtube_id": "__zy-oOLPug", "readable_id": "introduction-to-kinetics"}, "rp7T4IItbtM": {"duration": 487, "path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated/", "keywords": "humoral, cell, mediated, nonspecific, immunity, adaptive", "id": "rp7T4IItbtM", "title": "Types of immune responses: Innate and adaptive. humoral vs. cell-mediated", "description": "Overview of types of immune responses. Difference between innate and adaptive immunity. Differences between humoral adaptive immunity and cell-mediated adaptive immunity.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rp7T4IItbtM.mp4/rp7T4IItbtM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rp7T4IItbtM.mp4/rp7T4IItbtM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rp7T4IItbtM.m3u8/rp7T4IItbtM.m3u8"}, "slug": "types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated", "video_id": "rp7T4IItbtM", "youtube_id": "rp7T4IItbtM", "readable_id": "types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated"}, "kBVDSu7v8os": {"duration": 349, "path": "khan/math/differential-calculus/derivative_applications/rates_of_change/falling-ladder-related-rates/", "keywords": "", "id": "kBVDSu7v8os", "title": "Falling ladder related rates", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kBVDSu7v8os.mp4/kBVDSu7v8os.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kBVDSu7v8os.mp4/kBVDSu7v8os.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kBVDSu7v8os.m3u8/kBVDSu7v8os.m3u8"}, "slug": "falling-ladder-related-rates", "video_id": "kBVDSu7v8os", "youtube_id": "kBVDSu7v8os", "readable_id": "falling-ladder-related-rates"}, "eSXZwk8axmI": {"duration": 487, "path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/types-of-depression-and-bipolar-disorder-in-the-dsm5/", "keywords": "Bipolar Disorder (Disease Or Medical Condition),Depression (Symptom),Mental Illness (Disease Or Medical Condition),Health (Industry),Medicine (Field Of Study)", "id": "eSXZwk8axmI", "title": "Types of depression and bipolar disorder in the DSM5", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eSXZwk8axmI.mp4/eSXZwk8axmI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eSXZwk8axmI.mp4/eSXZwk8axmI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eSXZwk8axmI.m3u8/eSXZwk8axmI.m3u8"}, "slug": "types-of-depression-and-bipolar-disorder-in-the-dsm5", "video_id": "eSXZwk8axmI", "youtube_id": "eSXZwk8axmI", "readable_id": "types-of-depression-and-bipolar-disorder-in-the-dsm5"}, "jRrRqMJbHKc": {"duration": 619, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-area-pythagorean-theorem/", "keywords": "geometry, area, circumference, pythagorean, theorem", "id": "jRrRqMJbHKc", "title": "CA Geometry: Area, pythagorean theorem", "description": "26-30, area, circumference, pythagorean theorem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jRrRqMJbHKc.mp4/jRrRqMJbHKc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jRrRqMJbHKc.mp4/jRrRqMJbHKc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jRrRqMJbHKc.m3u8/jRrRqMJbHKc.m3u8"}, "slug": "ca-geometry-area-pythagorean-theorem", "video_id": "jRrRqMJbHKc", "youtube_id": "jRrRqMJbHKc", "readable_id": "ca-geometry-area-pythagorean-theorem"}, "GVZUpOm3XUg": {"duration": 386, "path": "khan/math/probability/independent-dependent-probability/basic_set_operations/universal-set-and-absolute-complement/", "keywords": "", "id": "GVZUpOm3XUg", "title": "Universal set and absolute complement", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GVZUpOm3XUg.mp4/GVZUpOm3XUg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GVZUpOm3XUg.mp4/GVZUpOm3XUg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GVZUpOm3XUg.m3u8/GVZUpOm3XUg.m3u8"}, "slug": "universal-set-and-absolute-complement", "video_id": "GVZUpOm3XUg", "youtube_id": "GVZUpOm3XUg", "readable_id": "universal-set-and-absolute-complement"}, "RuEJzPQ_N10": {"duration": 315, "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-6b/", "keywords": "AP, advanced, placement, exam", "id": "RuEJzPQ_N10", "title": "2011 Calculus AB free response #6b", "description": "Derivative of a piecewise-defined function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RuEJzPQ_N10.mp4/RuEJzPQ_N10.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RuEJzPQ_N10.mp4/RuEJzPQ_N10.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RuEJzPQ_N10.m3u8/RuEJzPQ_N10.m3u8"}, "slug": "2011-calculus-ab-free-response-6b", "video_id": "RuEJzPQ_N10", "youtube_id": "RuEJzPQ_N10", "readable_id": "2011-calculus-ab-free-response-6b"}, "yEAxG_D1HDw": {"duration": 477, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/proof-a-log-b-log-b-a-log-a-log-b-log-a-b/", "keywords": "logarithm, properties, proof, algebra, math, khan", "id": "yEAxG_D1HDw", "title": "Proof: a log b = log(b^a), log a - log b = log(a/b)", "description": "Proofs of the logarithm properties: A(log B) = log (B^A) and log A - log B = log (A/B)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yEAxG_D1HDw.mp4/yEAxG_D1HDw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yEAxG_D1HDw.mp4/yEAxG_D1HDw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yEAxG_D1HDw.m3u8/yEAxG_D1HDw.m3u8"}, "slug": "proof-a-log-b-log-b-a-log-a-log-b-log-a-b", "video_id": "yEAxG_D1HDw", "youtube_id": "yEAxG_D1HDw", "readable_id": "proof-a-log-b-log-b-a-log-a-log-b-log-a-b"}, "hIgnece9ins": {"duration": 1231, "path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/calculus-graphing-using-derivatives/", "keywords": "derivatives, calculus, graphing, inflection, critical, points, CC_39336_F-IF_7, CC_39336_F-IF_7_c", "id": "hIgnece9ins", "title": "Graphing using derivatives", "description": "Graphing functions using derivatives.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hIgnece9ins.mp4/hIgnece9ins.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hIgnece9ins.mp4/hIgnece9ins.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hIgnece9ins.m3u8/hIgnece9ins.m3u8"}, "slug": "calculus-graphing-using-derivatives", "video_id": "hIgnece9ins", "youtube_id": "hIgnece9ins", "readable_id": "calculus-graphing-using-derivatives"}, "7_QPAdHILzw": {"duration": 156, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-ones-tens/understanding-place-value-when-adding-ones/", "keywords": "", "id": "7_QPAdHILzw", "title": "Understanding place value when adding ones", "description": "Learn how to add 37 + 2 by thinking about place value.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7_QPAdHILzw.mp4/7_QPAdHILzw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7_QPAdHILzw.mp4/7_QPAdHILzw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7_QPAdHILzw.m3u8/7_QPAdHILzw.m3u8"}, "slug": "understanding-place-value-when-adding-ones", "video_id": "7_QPAdHILzw", "youtube_id": "7_QPAdHILzw", "readable_id": "understanding-place-value-when-adding-ones"}, "g_snytB7iQ0": {"duration": 600, "path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/dissolution-and-precipitation/", "keywords": "", "id": "g_snytB7iQ0", "title": "Dissolution and precipitation", "description": "Defining solute, solvent, hydration, dissolution, precipitation, net ionic equation, and spectator ions. Looking at the molecular level interactions between water and ions in NaCl.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g_snytB7iQ0.mp4/g_snytB7iQ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g_snytB7iQ0.mp4/g_snytB7iQ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g_snytB7iQ0.m3u8/g_snytB7iQ0.m3u8"}, "slug": "dissolution-and-precipitation", "video_id": "g_snytB7iQ0", "youtube_id": "g_snytB7iQ0", "readable_id": "dissolution-and-precipitation"}, "jmfcACEGW-0": {"duration": 360, "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/biliary-tree/", "keywords": "MCAT", "id": "jmfcACEGW-0", "title": "Biliary tree", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jmfcACEGW-0.mp4/jmfcACEGW-0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jmfcACEGW-0.mp4/jmfcACEGW-0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jmfcACEGW-0.m3u8/jmfcACEGW-0.m3u8"}, "slug": "biliary-tree", "video_id": "jmfcACEGW-0", "youtube_id": "jmfcACEGW-0", "readable_id": "biliary-tree"}, "TZ7d5kjAlQw": {"duration": 309, "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/using-reserves-to-stablize-currency/", "keywords": "macroeconomics, currency, crisis", "id": "TZ7d5kjAlQw", "title": "Using reserves to stabilize currency", "description": "How a central bank could use foreign currency reserves to keep its own currency from devaluing", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TZ7d5kjAlQw.mp4/TZ7d5kjAlQw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TZ7d5kjAlQw.mp4/TZ7d5kjAlQw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TZ7d5kjAlQw.m3u8/TZ7d5kjAlQw.m3u8"}, "slug": "using-reserves-to-stablize-currency", "video_id": "TZ7d5kjAlQw", "youtube_id": "TZ7d5kjAlQw", "readable_id": "using-reserves-to-stablize-currency"}, "Nu_6X04EGHk": {"duration": 484, "path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/a-tour-of-hadrian-s-villa-with-dr-bernard-frischer/", "keywords": "art history, khan academy, smarthistory, Hadrian, Rome, Tivoli, Hadrians Villa, Ancient Rome, Roman architecture", "id": "Nu_6X04EGHk", "title": "Hadrian's Villa, Tivoli: A virtual tour", "description": "A virtual tour of Hadrian's Villa using a 3D digital model of the villa created under the direction of Dr. Bernard Frischer. The ruins of Hadrian's Villa, in the town of Tivoli, near Rome, is spread over an area of approximately 250 acres. Many of the structures were designed by the Emperor Hadrian who ruled from 117 until his death in 138 C.E. This virtual rendering is based on current archeological research and has been created in consultation with art historians, archaeologists, and museum curators with expertise in this area. Please note, a few features are necessarily assumptions based on the best available evidence. Speakers: Dr. Bernard Frischer and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Nu_6X04EGHk.mp4/Nu_6X04EGHk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Nu_6X04EGHk.mp4/Nu_6X04EGHk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Nu_6X04EGHk.m3u8/Nu_6X04EGHk.m3u8"}, "slug": "a-tour-of-hadrian-s-villa-with-dr-bernard-frischer", "video_id": "Nu_6X04EGHk", "youtube_id": "Nu_6X04EGHk", "readable_id": "a-tour-of-hadrian-s-villa-with-dr-bernard-frischer"}, "QM4f1vos6Vk": {"duration": 764, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/pressure-in-the-left-heart-part-2/", "keywords": "", "id": "QM4f1vos6Vk", "title": "Pressure in the left heart - part 2", "description": "Watch the pressure in the left heart go up and down with every heart beat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QM4f1vos6Vk.mp4/QM4f1vos6Vk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QM4f1vos6Vk.mp4/QM4f1vos6Vk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QM4f1vos6Vk.m3u8/QM4f1vos6Vk.m3u8"}, "slug": "pressure-in-the-left-heart-part-2", "video_id": "QM4f1vos6Vk", "youtube_id": "QM4f1vos6Vk", "readable_id": "pressure-in-the-left-heart-part-2"}, "-aGYytZ7K7M": {"duration": 433, "path": "khan/science/biology/membranes-and-transport/active-transport/uniporters-symporters-and-antiporters/", "keywords": "education,online learning,learning,lessons,active transport,facilitated diffusion,symporter,antiporter,secondary active transport,ATPase,cell membrane", "id": "-aGYytZ7K7M", "title": "Uniporters, symporters and antiporters", "description": "A review of various forms of passive and active transport including facilitated diffusion (uniporters), symporters, and exchangers; a discussion of primary and secondary active transport.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-aGYytZ7K7M.mp4/-aGYytZ7K7M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-aGYytZ7K7M.mp4/-aGYytZ7K7M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-aGYytZ7K7M.m3u8/-aGYytZ7K7M.m3u8"}, "slug": "uniporters-symporters-and-antiporters", "video_id": "-aGYytZ7K7M", "youtube_id": "-aGYytZ7K7M", "readable_id": "uniporters-symporters-and-antiporters"}, "mxVWyzzMOXM": {"duration": 845, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/corp-bankruptcy-tutorial/chapter-11-bankruptcy-restructuring/", "keywords": "chapter, 11, restructuring, bankruptcy", "id": "mxVWyzzMOXM", "title": "Chapter 11: Bankruptcy restructuring", "description": "Chapter 11: Restructuring through a bankruptcy", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mxVWyzzMOXM.mp4/mxVWyzzMOXM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mxVWyzzMOXM.mp4/mxVWyzzMOXM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mxVWyzzMOXM.m3u8/mxVWyzzMOXM.m3u8"}, "slug": "chapter-11-bankruptcy-restructuring", "video_id": "mxVWyzzMOXM", "youtube_id": "mxVWyzzMOXM", "readable_id": "chapter-11-bankruptcy-restructuring"}, "8CluknrLeys": {"duration": 232, "path": "khan/computing/computer-science/cryptography/modern-crypt/the-fundamental-theorem-of-arithmetic-1/", "keywords": "prime numbers, factorization, number theory", "id": "8CluknrLeys", "title": "The fundamental theorem of arithmetic", "description": "Independent realization from an ancestor's perspective", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8CluknrLeys.mp4/8CluknrLeys.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8CluknrLeys.mp4/8CluknrLeys.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8CluknrLeys.m3u8/8CluknrLeys.m3u8"}, "slug": "the-fundamental-theorem-of-arithmetic-1", "video_id": "8CluknrLeys", "youtube_id": "8CluknrLeys", "readable_id": "the-fundamental-theorem-of-arithmetic-1"}, "9bwy85M1Zxg": {"duration": 242, "path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/part-2-parameterizing-the-surface/", "keywords": "Part, 2, Parameterizing, the, Surface", "id": "9bwy85M1Zxg", "title": "Stokes example part 2: Parameterizing the surface", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9bwy85M1Zxg.mp4/9bwy85M1Zxg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9bwy85M1Zxg.mp4/9bwy85M1Zxg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9bwy85M1Zxg.m3u8/9bwy85M1Zxg.m3u8"}, "slug": "part-2-parameterizing-the-surface", "video_id": "9bwy85M1Zxg", "youtube_id": "9bwy85M1Zxg", "readable_id": "part-2-parameterizing-the-surface"}, "q9W0Uqi4Y58": {"duration": 133, "path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/biodiversity-hotspot-case-study-california/", "keywords": "", "id": "q9W0Uqi4Y58", "title": "Biodiversity hotspot case study: California", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q9W0Uqi4Y58.mp4/q9W0Uqi4Y58.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q9W0Uqi4Y58.mp4/q9W0Uqi4Y58.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q9W0Uqi4Y58.m3u8/q9W0Uqi4Y58.m3u8"}, "slug": "biodiversity-hotspot-case-study-california", "video_id": "q9W0Uqi4Y58", "youtube_id": "q9W0Uqi4Y58", "readable_id": "biodiversity-hotspot-case-study-california"}, "yF4cvbAYjwI": {"duration": 199, "path": "khan/test-prep/mcat/physical-processes/sound/relative-speed-of-sound-in-solids-liquids-and-gases/", "keywords": "", "id": "yF4cvbAYjwI", "title": "Relative speed of sound in solids, liquids, and gases", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yF4cvbAYjwI.mp4/yF4cvbAYjwI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yF4cvbAYjwI.mp4/yF4cvbAYjwI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yF4cvbAYjwI.m3u8/yF4cvbAYjwI.m3u8"}, "slug": "relative-speed-of-sound-in-solids-liquids-and-gases", "video_id": "yF4cvbAYjwI", "youtube_id": "yF4cvbAYjwI", "readable_id": "relative-speed-of-sound-in-solids-liquids-and-gases"}, "UQK7EAgRBpE": {"duration": 234, "path": "khan/science/discoveries-projects/thermo-can/thermo-can/", "keywords": "Thermodynamics, boat", "id": "UQK7EAgRBpE", "title": "Thermo can", "description": "This project shows how to power a boat with a candle.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UQK7EAgRBpE.mp4/UQK7EAgRBpE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UQK7EAgRBpE.mp4/UQK7EAgRBpE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UQK7EAgRBpE.m3u8/UQK7EAgRBpE.m3u8"}, "slug": "thermo-can", "video_id": "UQK7EAgRBpE", "youtube_id": "UQK7EAgRBpE", "readable_id": "thermo-can"}, "zZX9jJqSlQs": {"duration": 479, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/alveolar-gas-equation-part-1/", "keywords": "", "id": "zZX9jJqSlQs", "title": "Alveolar gas equation - part 1", "description": "Find out how to calculate exactly how much oxygen is deep down inside your lungs! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zZX9jJqSlQs.mp4/zZX9jJqSlQs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zZX9jJqSlQs.mp4/zZX9jJqSlQs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zZX9jJqSlQs.m3u8/zZX9jJqSlQs.m3u8"}, "slug": "alveolar-gas-equation-part-1", "video_id": "zZX9jJqSlQs", "youtube_id": "zZX9jJqSlQs", "readable_id": "alveolar-gas-equation-part-1"}, "L7P3kBJ3scg": {"duration": 216, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/ruisdael-haarlem/", "keywords": "Haarlem, Ruisdael, Holland, Baroque, painting, landscape, linen", "id": "L7P3kBJ3scg", "title": "Ruisdael, View of Haarlem with Bleaching Grounds", "description": "Jacob van Ruisdael, View of Haarlem with Bleaching Grounds, c. 1670\u201375, oil on canvas, 55.5 x 62 cm (Mauritshuis, The Hague)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L7P3kBJ3scg.mp4/L7P3kBJ3scg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L7P3kBJ3scg.mp4/L7P3kBJ3scg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L7P3kBJ3scg.m3u8/L7P3kBJ3scg.m3u8"}, "slug": "ruisdael-haarlem", "video_id": "L7P3kBJ3scg", "youtube_id": "L7P3kBJ3scg", "readable_id": "ruisdael-haarlem"}, "223KLPnJCBI": {"duration": 799, "path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/common-ion-effect/", "keywords": "", "id": "223KLPnJCBI", "title": "Common ion effect and buffers", "description": "Example of calculating the pH of solution that is 1.00 M acetic acid and 1.00 M sodium acetate using ICE table. Another example of calculating pH of a solution that is 0.15 M ammonia and 0.35 M ammonium nitrate.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/223KLPnJCBI.mp4/223KLPnJCBI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/223KLPnJCBI.mp4/223KLPnJCBI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/223KLPnJCBI.m3u8/223KLPnJCBI.m3u8"}, "slug": "common-ion-effect", "video_id": "223KLPnJCBI", "youtube_id": "223KLPnJCBI", "readable_id": "common-ion-effect"}, "AD3-v1oKjSk": {"duration": 424, "path": "khan/test-prep/mcat/chemical-processes/enzymes/the-six-types-of-enzymes/", "keywords": "", "id": "AD3-v1oKjSk", "title": "Six types of enzymes", "description": "Enzymes are often named for their reactions, and you can often discern the function of an enzyme from its name. We will learn about six types of enzymes based on the type of reaction they catalyze.\u00a0By Ross Firestone.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AD3-v1oKjSk.mp4/AD3-v1oKjSk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AD3-v1oKjSk.mp4/AD3-v1oKjSk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AD3-v1oKjSk.m3u8/AD3-v1oKjSk.m3u8"}, "slug": "the-six-types-of-enzymes", "video_id": "AD3-v1oKjSk", "youtube_id": "AD3-v1oKjSk", "readable_id": "the-six-types-of-enzymes"}, "By-ggTfeuJU": {"duration": 480, "path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/newton-s-third-law-of-motion/", "keywords": "force, motion, physics", "id": "By-ggTfeuJU", "title": "Newton's third law of motion", "description": "Every action has an equal and opposite reaction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/By-ggTfeuJU.mp4/By-ggTfeuJU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/By-ggTfeuJU.mp4/By-ggTfeuJU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/By-ggTfeuJU.m3u8/By-ggTfeuJU.m3u8"}, "slug": "newton-s-third-law-of-motion", "video_id": "By-ggTfeuJU", "youtube_id": "By-ggTfeuJU", "readable_id": "newton-s-third-law-of-motion"}, "tbL-SRTtgq0": {"duration": 393, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-7/", "keywords": "", "id": "tbL-SRTtgq0", "title": "7 Figuring out angles", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tbL-SRTtgq0.mp4/tbL-SRTtgq0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tbL-SRTtgq0.mp4/tbL-SRTtgq0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tbL-SRTtgq0.m3u8/tbL-SRTtgq0.m3u8"}, "slug": "2013-sat-practice-6-7", "video_id": "tbL-SRTtgq0", "youtube_id": "tbL-SRTtgq0", "readable_id": "2013-sat-practice-6-7"}, "GN0P5RkQAow": {"duration": 390, "path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/andrea-mantegna-camera-degli-sposi-frescos-in-the-ducal-palace-mantua-1465-74/", "keywords": "Renaissance, Mantua, Smarthistory, art, art history", "id": "GN0P5RkQAow", "title": "Mantegna, Camera degli Sposi", "description": "Andrea Mantegna, Camera degli Sposi (Frescos in the ducal palace, Mantua), 1465-74 Speakers: Beth Harris and David Drogin", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GN0P5RkQAow.mp4/GN0P5RkQAow.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GN0P5RkQAow.mp4/GN0P5RkQAow.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GN0P5RkQAow.m3u8/GN0P5RkQAow.m3u8"}, "slug": "andrea-mantegna-camera-degli-sposi-frescos-in-the-ducal-palace-mantua-1465-74", "video_id": "GN0P5RkQAow", "youtube_id": "GN0P5RkQAow", "readable_id": "andrea-mantegna-camera-degli-sposi-frescos-in-the-ducal-palace-mantua-1465-74"}, "Kh8HKAxdEyw": {"duration": 283, "path": "khan/math/precalculus/precalc-matrices/transformation-matrix/transforming-position-vector/", "keywords": "", "id": "Kh8HKAxdEyw", "title": "Transformation matrix for position vector", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Kh8HKAxdEyw.mp4/Kh8HKAxdEyw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Kh8HKAxdEyw.mp4/Kh8HKAxdEyw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Kh8HKAxdEyw.m3u8/Kh8HKAxdEyw.m3u8"}, "slug": "transforming-position-vector", "video_id": "Kh8HKAxdEyw", "youtube_id": "Kh8HKAxdEyw", "readable_id": "transforming-position-vector"}, "Mci8Cuik_Gw": {"duration": 288, "path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-for-derivative-of-2-x/", "keywords": "", "id": "Mci8Cuik_Gw", "title": "Chain rule for derivative of 2^x", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mci8Cuik_Gw.mp4/Mci8Cuik_Gw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mci8Cuik_Gw.mp4/Mci8Cuik_Gw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mci8Cuik_Gw.m3u8/Mci8Cuik_Gw.m3u8"}, "slug": "chain-rule-for-derivative-of-2-x", "video_id": "Mci8Cuik_Gw", "youtube_id": "Mci8Cuik_Gw", "readable_id": "chain-rule-for-derivative-of-2-x"}, "tdEF5cQzWms": {"duration": 181, "path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/breakthrough/", "keywords": "community, death, ingenuity, silk, textile, turmoil, wool, Europe", "id": "tdEF5cQzWms", "title": "Van Orley and de Pannemaker, The Last Supper", "description": "Met director Thomas P. Campbell on game changers in Bernard van Orley and Pieter de Pannemaker\u2019s The Last Supper,\u00a0c. 1524\u201346 (design), c. 1525\u201328 (woven).\n\nThis splendid Last Supper is part of a series of four tapestries illustrating the Passion of Christ. They were designed by Bernard van Orley, a leading artist in sixteenth-century Brussels, the preeminent center for tapestry manufacture in this period. The work exemplifies van Orley\u2019s integration of Northern traditions and Italian models to develop a new tapestry style. He combined the expressive emotion and penchant for detail found in Albrecht D\u00fcrer\u2019s Last Supper woodcut, which inspired the tapestry\u2019s compositional arrangement, with Raphael\u2019s monumental figures and spatial construction. Raphael\u2019s cartoons for the tapestry series Acts of the Apostles, commissioned for the Sistine Chapel and sent to Brussels to be woven, were significant models for van Orley and other Flemish artists, providing a paradigm of the grand, heroic narrative style of contemporary Roman art. In the Last Supper, populated by muscular, rhetorically gesturing figures engaged in a moment of high drama, van Orley fully realized tapestry's potential for emulating monumental painting.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, try this and also visit\u00a0Find an Educator Resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tdEF5cQzWms.mp4/tdEF5cQzWms.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tdEF5cQzWms.mp4/tdEF5cQzWms.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tdEF5cQzWms.m3u8/tdEF5cQzWms.m3u8"}, "slug": "breakthrough", "video_id": "tdEF5cQzWms", "youtube_id": "tdEF5cQzWms", "readable_id": "breakthrough"}, "4TuQ7YI-soQ": {"duration": 217, "path": "khan/partner-content/wi-phi/critical-thinking/mental-accounting/", "keywords": "Cognitive Bias,Critical Thinking (Literature Subject),Mental Accounting,Psychology (Field Of Study),Behavioral Economics (Field Of Study),Cognitive Psychology (Field Of Study),Cognitive Science (Field Of Study),Philosophy (Field Of Study),Laurie Santos,Yale University (College/University),Khan Academy (Nonprofit Organization),Wireless Philosophy,Wiphi", "id": "4TuQ7YI-soQ", "title": "Cognitive Biases: Mental Accounting", "description": "The psychologist Laurie Santos (Yale University) explains the phenomenon of mental accounting: why we don't always assume that money is fungible. She explores why we set up different accounts for different purchases and how we can use our mental accounting biases to be happier about our financial decisions.\n\nSpeaker: Dr.\u00a0Laurie Santos, Associate Professor of Psychology, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4TuQ7YI-soQ.mp4/4TuQ7YI-soQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4TuQ7YI-soQ.mp4/4TuQ7YI-soQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4TuQ7YI-soQ.m3u8/4TuQ7YI-soQ.m3u8"}, "slug": "mental-accounting", "video_id": "4TuQ7YI-soQ", "youtube_id": "4TuQ7YI-soQ", "readable_id": "mental-accounting"}, "-Y3CbsxhlQE": {"duration": 499, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/neurogenic-shock/", "keywords": "", "id": "-Y3CbsxhlQE", "title": "Neurogenic shock", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-Y3CbsxhlQE.mp4/-Y3CbsxhlQE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-Y3CbsxhlQE.mp4/-Y3CbsxhlQE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-Y3CbsxhlQE.m3u8/-Y3CbsxhlQE.m3u8"}, "slug": "neurogenic-shock", "video_id": "-Y3CbsxhlQE", "youtube_id": "-Y3CbsxhlQE", "readable_id": "neurogenic-shock"}, "gs-OPF3KEGU": {"duration": 293, "path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-data/misleading-line-graphs/", "keywords": "u08_l3_t1_we2, Misleading, Line, Graphs", "id": "gs-OPF3KEGU", "title": "Misleading line graphs", "description": "Misleading Line Graphs", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gs-OPF3KEGU.mp4/gs-OPF3KEGU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gs-OPF3KEGU.mp4/gs-OPF3KEGU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gs-OPF3KEGU.m3u8/gs-OPF3KEGU.m3u8"}, "slug": "misleading-line-graphs", "video_id": "gs-OPF3KEGU", "youtube_id": "gs-OPF3KEGU", "readable_id": "misleading-line-graphs"}, "jXanAqj_BVA": {"duration": 596, "path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-endo-rule-new/", "keywords": "Diels\u2013Alder Reaction,endo product,endo adduct", "id": "jXanAqj_BVA", "title": "Diels-Alder: endo rule", "description": "How to draw the endo product for a Diels-Alder reaction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jXanAqj_BVA.mp4/jXanAqj_BVA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jXanAqj_BVA.mp4/jXanAqj_BVA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jXanAqj_BVA.m3u8/jXanAqj_BVA.m3u8"}, "slug": "diels-alder-endo-rule-new", "video_id": "jXanAqj_BVA", "youtube_id": "jXanAqj_BVA", "readable_id": "diels-alder-endo-rule-new"}, "7QMoNY6FzvM": {"duration": 196, "path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphing-a-parabola-in-vertex-form/", "keywords": "", "id": "7QMoNY6FzvM", "title": "Graphing a parabola in vertex form", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7QMoNY6FzvM.mp4/7QMoNY6FzvM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7QMoNY6FzvM.mp4/7QMoNY6FzvM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7QMoNY6FzvM.m3u8/7QMoNY6FzvM.m3u8"}, "slug": "graphing-a-parabola-in-vertex-form", "video_id": "7QMoNY6FzvM", "youtube_id": "7QMoNY6FzvM", "readable_id": "graphing-a-parabola-in-vertex-form"}, "oqBHBO8cqLI": {"duration": 584, "path": "khan/science/physics/oscillatory-motion/harmonic-motion/harmonic-motion-part-3-no-calculus/", "keywords": "harmonic, motion, period, frequency, trigonometry, physics, oscillatory", "id": "oqBHBO8cqLI", "title": "Harmonic motion part 3 (no calculus)", "description": "Figuring out the period, frequency, and amplitude of the harmonic motion of a mass attached to a spring.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oqBHBO8cqLI.mp4/oqBHBO8cqLI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oqBHBO8cqLI.mp4/oqBHBO8cqLI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oqBHBO8cqLI.m3u8/oqBHBO8cqLI.m3u8"}, "slug": "harmonic-motion-part-3-no-calculus", "video_id": "oqBHBO8cqLI", "youtube_id": "oqBHBO8cqLI", "readable_id": "harmonic-motion-part-3-no-calculus"}, "qaYi3_wFlFM": {"duration": 106, "path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/charactermodeling2/", "keywords": "", "id": "qaYi3_wFlFM", "title": "2. Subdivide operation", "description": "Now we can combine split and average into a single operation called subdivide.\nClick here to review midpoints.\nClick here\u00a0to go to the Environment Modeling lesson.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qaYi3_wFlFM.mp4/qaYi3_wFlFM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qaYi3_wFlFM.mp4/qaYi3_wFlFM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qaYi3_wFlFM.m3u8/qaYi3_wFlFM.m3u8"}, "slug": "charactermodeling2", "video_id": "qaYi3_wFlFM", "youtube_id": "qaYi3_wFlFM", "readable_id": "charactermodeling2"}, "fGThIRpWEE4": {"duration": 589, "path": "khan/math/algebra-basics/quadratics-polynomials-topic/multiplying-binomials-core-algebra/multiplication-of-polynomials/", "keywords": "Multiplication, of, Polynomials, CC_39336_A-APR_1", "id": "fGThIRpWEE4", "title": "Multiplying binomials and polynomials", "description": "Multiplying binomials", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fGThIRpWEE4.mp4/fGThIRpWEE4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fGThIRpWEE4.mp4/fGThIRpWEE4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fGThIRpWEE4.m3u8/fGThIRpWEE4.m3u8"}, "slug": "multiplication-of-polynomials", "video_id": "fGThIRpWEE4", "youtube_id": "fGThIRpWEE4", "readable_id": "multiplication-of-polynomials"}, "OVzIjV0yRmw": {"duration": 113, "path": "khan/partner-content/pixar/crowds/crowds2/crowds10/", "keywords": "", "id": "OVzIjV0yRmw", "title": "5. Does order matter?", "description": "Why do we divide the number of combinations by the number of permutations?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OVzIjV0yRmw.mp4/OVzIjV0yRmw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OVzIjV0yRmw.mp4/OVzIjV0yRmw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OVzIjV0yRmw.m3u8/OVzIjV0yRmw.m3u8"}, "slug": "crowds10", "video_id": "OVzIjV0yRmw", "youtube_id": "OVzIjV0yRmw", "readable_id": "crowds10"}, "TdW3LdN5SJw": {"duration": 188, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/call-writer-payoff-diagram/", "keywords": "Call, Writer, Payoff, Diagram", "id": "TdW3LdN5SJw", "title": "Call writer payoff diagram", "description": "Call Writer Payoff Diagram", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TdW3LdN5SJw.mp4/TdW3LdN5SJw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TdW3LdN5SJw.mp4/TdW3LdN5SJw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TdW3LdN5SJw.m3u8/TdW3LdN5SJw.m3u8"}, "slug": "call-writer-payoff-diagram", "video_id": "TdW3LdN5SJw", "youtube_id": "TdW3LdN5SJw", "readable_id": "call-writer-payoff-diagram"}, "ALzFkqiTpvM": {"duration": 727, "path": "khan/college-admissions/paying-for-college/loans/paying-back-your-loans/", "keywords": "", "id": "ALzFkqiTpvM", "title": "Paying back your loans", "description": "National Student Loan Data System\u00a0| Federal Loan Consolidation\u00a0| Federal Loan Deferment or Forbearance\u00a0| Federal Loan Repayment Estimator | Federal Loan Forgiveness", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ALzFkqiTpvM.mp4/ALzFkqiTpvM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ALzFkqiTpvM.mp4/ALzFkqiTpvM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ALzFkqiTpvM.m3u8/ALzFkqiTpvM.m3u8"}, "slug": "paying-back-your-loans", "video_id": "ALzFkqiTpvM", "youtube_id": "ALzFkqiTpvM", "readable_id": "paying-back-your-loans"}, "w23DzA68KPE": {"duration": 75, "path": "khan/math/pre-algebra/decimals-pre-alg/decimals-on-number-line-pre-alg/positive-and-negative-decimals-on-a-number-line/", "keywords": "", "id": "w23DzA68KPE", "title": "Placing positive and negative decimals on a number line", "description": "These example exercises require us to interpret a number line in order to locate where our positive and negative decimals should be placed.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w23DzA68KPE.mp4/w23DzA68KPE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w23DzA68KPE.mp4/w23DzA68KPE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w23DzA68KPE.m3u8/w23DzA68KPE.m3u8"}, "slug": "positive-and-negative-decimals-on-a-number-line", "video_id": "w23DzA68KPE", "youtube_id": "w23DzA68KPE", "readable_id": "positive-and-negative-decimals-on-a-number-line"}, "7CmbItRjM-Y": {"duration": 900, "path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/single-slit-interference/", "keywords": "", "id": "7CmbItRjM-Y", "title": "Single Slit Interference", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7CmbItRjM-Y.mp4/7CmbItRjM-Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7CmbItRjM-Y.mp4/7CmbItRjM-Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7CmbItRjM-Y.m3u8/7CmbItRjM-Y.m3u8"}, "slug": "single-slit-interference", "video_id": "7CmbItRjM-Y", "youtube_id": "7CmbItRjM-Y", "readable_id": "single-slit-interference"}, "umvNQj-zmq4": {"duration": 437, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/are-southern-hemisphere-seasons-more-severe/", "keywords": "earth, ellipse, perihelion, aphelion, seasons, specific, heat", "id": "umvNQj-zmq4", "title": "Are southern hemisphere seasons more severe?", "description": "Are Southern Hemisphere seasons more severe because of the eccentricity in Earth's orbit?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/umvNQj-zmq4.mp4/umvNQj-zmq4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/umvNQj-zmq4.mp4/umvNQj-zmq4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/umvNQj-zmq4.m3u8/umvNQj-zmq4.m3u8"}, "slug": "are-southern-hemisphere-seasons-more-severe", "video_id": "umvNQj-zmq4", "youtube_id": "umvNQj-zmq4", "readable_id": "are-southern-hemisphere-seasons-more-severe"}, "X_PnRFAKbkg": {"duration": 175, "path": "khan/math/early-math/cc-early-math-place-value-topic/cc-early-math-tens/place-value-example/", "keywords": "", "id": "X_PnRFAKbkg", "title": "Place value example with 25", "description": "Learn to see 25 as 2 tens and 5 ones.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X_PnRFAKbkg.mp4/X_PnRFAKbkg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X_PnRFAKbkg.mp4/X_PnRFAKbkg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X_PnRFAKbkg.m3u8/X_PnRFAKbkg.m3u8"}, "slug": "place-value-example", "video_id": "X_PnRFAKbkg", "youtube_id": "X_PnRFAKbkg", "readable_id": "place-value-example"}, "GZ6I3T1RAnQ": {"duration": 549, "path": "khan/science/health-and-medicine/healthcare-misc/inflammation/", "keywords": "Inflammation", "id": "GZ6I3T1RAnQ", "title": "Inflammation", "description": "Dr. David Agus talks about inflammation (while Sal repeatedly misspells it with one \"m\")", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GZ6I3T1RAnQ.mp4/GZ6I3T1RAnQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GZ6I3T1RAnQ.mp4/GZ6I3T1RAnQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GZ6I3T1RAnQ.m3u8/GZ6I3T1RAnQ.m3u8"}, "slug": "inflammation", "video_id": "GZ6I3T1RAnQ", "youtube_id": "GZ6I3T1RAnQ", "readable_id": "inflammation"}, "yP5PWgbGImo": {"duration": 248, "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments/sscc-blended-stationkippla/", "keywords": "", "id": "yP5PWgbGImo", "title": "Redesigning the school day at KIPP LA using a station rotation model", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yP5PWgbGImo.mp4/yP5PWgbGImo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yP5PWgbGImo.mp4/yP5PWgbGImo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yP5PWgbGImo.m3u8/yP5PWgbGImo.m3u8"}, "slug": "sscc-blended-stationkippla", "video_id": "yP5PWgbGImo", "youtube_id": "yP5PWgbGImo", "readable_id": "sscc-blended-stationkippla"}, "CIRZaJ4Vboo": {"duration": 325, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s3-harder/", "keywords": "", "id": "CIRZaJ4Vboo", "title": "Complex numbers \u2014 Harder example", "description": "\u200bWatch Sal work through a harder Complex numbers problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CIRZaJ4Vboo.mp4/CIRZaJ4Vboo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CIRZaJ4Vboo.mp4/CIRZaJ4Vboo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CIRZaJ4Vboo.m3u8/CIRZaJ4Vboo.m3u8"}, "slug": "sat-math-s3-harder", "video_id": "CIRZaJ4Vboo", "youtube_id": "CIRZaJ4Vboo", "readable_id": "sat-math-s3-harder"}, "gW8za1t2nFg": {"duration": 667, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-properties-ethers/ether-nomenclature/", "keywords": "", "id": "gW8za1t2nFg", "title": "Ether nomenclature", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gW8za1t2nFg.mp4/gW8za1t2nFg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gW8za1t2nFg.mp4/gW8za1t2nFg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gW8za1t2nFg.m3u8/gW8za1t2nFg.m3u8"}, "slug": "ether-nomenclature", "video_id": "gW8za1t2nFg", "youtube_id": "gW8za1t2nFg", "readable_id": "ether-nomenclature"}, "GviCdNfeXw8": {"duration": 603, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-9/", "keywords": "gmat, data, sufficiency", "id": "GviCdNfeXw8", "title": "GMAT: Data sufficiency 9", "description": "42-46, pg. 281", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GviCdNfeXw8.mp4/GviCdNfeXw8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GviCdNfeXw8.mp4/GviCdNfeXw8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GviCdNfeXw8.m3u8/GviCdNfeXw8.m3u8"}, "slug": "gmat-data-sufficiency-9", "video_id": "GviCdNfeXw8", "youtube_id": "GviCdNfeXw8", "readable_id": "gmat-data-sufficiency-9"}, "w70af5Ou70M": {"duration": 419, "path": "khan/math/differential-calculus/limits_topic/epsilon_delta/epsilon-delta-definition-of-limits/", "keywords": "", "id": "w70af5Ou70M", "title": "Epsilon-delta definition of limits", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w70af5Ou70M.mp4/w70af5Ou70M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w70af5Ou70M.mp4/w70af5Ou70M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w70af5Ou70M.m3u8/w70af5Ou70M.m3u8"}, "slug": "epsilon-delta-definition-of-limits", "video_id": "w70af5Ou70M", "youtube_id": "w70af5Ou70M", "readable_id": "epsilon-delta-definition-of-limits"}, "u8JFdwmBvvQ": {"duration": 146, "path": "khan/math/geometry/cc-geometry-circles/circles/area-of-a-sector-given-a-central-angle/", "keywords": "", "id": "u8JFdwmBvvQ", "title": "Area of a sector given a central angle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u8JFdwmBvvQ.mp4/u8JFdwmBvvQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u8JFdwmBvvQ.mp4/u8JFdwmBvvQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u8JFdwmBvvQ.m3u8/u8JFdwmBvvQ.m3u8"}, "slug": "area-of-a-sector-given-a-central-angle", "video_id": "u8JFdwmBvvQ", "youtube_id": "u8JFdwmBvvQ", "readable_id": "area-of-a-sector-given-a-central-angle"}, "kQCS1AhAnMI": {"duration": 719, "path": "khan/science/organic-chemistry/organic-structures/formal-charge-resonance/resonance-localized-delocalized/", "keywords": "", "id": "kQCS1AhAnMI", "title": "Resonance structures and hybridization", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kQCS1AhAnMI.mp4/kQCS1AhAnMI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kQCS1AhAnMI.mp4/kQCS1AhAnMI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kQCS1AhAnMI.m3u8/kQCS1AhAnMI.m3u8"}, "slug": "resonance-localized-delocalized", "video_id": "kQCS1AhAnMI", "youtube_id": "kQCS1AhAnMI", "readable_id": "resonance-localized-delocalized"}, "GiB9Mkgkrek": {"duration": 170, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/real-nominal-return-tut/calculating-real-return-in-last-year-dollars/", "keywords": "finance, inflation, discount, rate, real, nominal, return", "id": "GiB9Mkgkrek", "title": "Calculating real return in last year dollars", "description": "Calculating real return in last year dollars", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GiB9Mkgkrek.mp4/GiB9Mkgkrek.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GiB9Mkgkrek.mp4/GiB9Mkgkrek.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GiB9Mkgkrek.m3u8/GiB9Mkgkrek.m3u8"}, "slug": "calculating-real-return-in-last-year-dollars", "video_id": "GiB9Mkgkrek", "youtube_id": "GiB9Mkgkrek", "readable_id": "calculating-real-return-in-last-year-dollars"}, "Kf9KhwryQNE": {"duration": 734, "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/marginal-utility/", "keywords": "microeconomics, utility", "id": "Kf9KhwryQNE", "title": "Marginal utility", "description": "Marginal utility and marginal benefit. How you would spend $5 on chocolate and fruit", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Kf9KhwryQNE.mp4/Kf9KhwryQNE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Kf9KhwryQNE.mp4/Kf9KhwryQNE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Kf9KhwryQNE.m3u8/Kf9KhwryQNE.m3u8"}, "slug": "marginal-utility", "video_id": "Kf9KhwryQNE", "youtube_id": "Kf9KhwryQNE", "readable_id": "marginal-utility"}, "LcyEXlCIkmA": {"duration": 414, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/arterial-stiffness/compliance-increased-blood-flow/", "keywords": "", "id": "LcyEXlCIkmA", "title": "Compliance - increased blood flow", "description": "Learn how compliant arteries allows for a \"Constant Pressure System\" like a modern water gun! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LcyEXlCIkmA.mp4/LcyEXlCIkmA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LcyEXlCIkmA.mp4/LcyEXlCIkmA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LcyEXlCIkmA.m3u8/LcyEXlCIkmA.m3u8"}, "slug": "compliance-increased-blood-flow", "video_id": "LcyEXlCIkmA", "youtube_id": "LcyEXlCIkmA", "readable_id": "compliance-increased-blood-flow"}, "Q1vMNyIP4Us": {"duration": 98, "path": "khan/math/algebra/introduction-to-algebra/writing-expressions-tutorial/writing-expressions-1/", "keywords": "", "id": "Q1vMNyIP4Us", "title": "How to write expressions with variables", "description": "Learn how to write simple algebraic expressions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q1vMNyIP4Us.mp4/Q1vMNyIP4Us.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q1vMNyIP4Us.mp4/Q1vMNyIP4Us.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q1vMNyIP4Us.m3u8/Q1vMNyIP4Us.m3u8"}, "slug": "writing-expressions-1", "video_id": "Q1vMNyIP4Us", "youtube_id": "Q1vMNyIP4Us", "readable_id": "writing-expressions-1"}, "CQxPpe17qyw": {"duration": 74, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/subject-verb-agreement-basic/", "keywords": "education,online learning,learning,lessons", "id": "CQxPpe17qyw", "title": "Writing: Subject-verb agreement \u2014 Basic example", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0subject-verb agreement.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CQxPpe17qyw.mp4/CQxPpe17qyw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CQxPpe17qyw.mp4/CQxPpe17qyw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CQxPpe17qyw.m3u8/CQxPpe17qyw.m3u8"}, "slug": "subject-verb-agreement-basic", "video_id": "CQxPpe17qyw", "youtube_id": "CQxPpe17qyw", "readable_id": "subject-verb-agreement-basic"}, "bL7yQRbYJCo": {"duration": 273, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/how-do-you-know-if-someone-is-having-a-stroke-think-fast/", "keywords": "", "id": "bL7yQRbYJCo", "title": "How do you know if someone is having a stroke: Think FAST!", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bL7yQRbYJCo.mp4/bL7yQRbYJCo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bL7yQRbYJCo.mp4/bL7yQRbYJCo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bL7yQRbYJCo.m3u8/bL7yQRbYJCo.m3u8"}, "slug": "how-do-you-know-if-someone-is-having-a-stroke-think-fast", "video_id": "bL7yQRbYJCo", "youtube_id": "bL7yQRbYJCo", "readable_id": "how-do-you-know-if-someone-is-having-a-stroke-think-fast"}, "tOd2T72eJME": {"duration": 72, "path": "khan/math/pre-algebra/rates-and-ratios/ratios_and_proportions/ratio-word-problem-exercise-example-2/", "keywords": "", "id": "tOd2T72eJME", "title": "Ratio word problem: centimeters to kilometers", "description": "Let's solve this word problem using what we know about ratios so far.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tOd2T72eJME.mp4/tOd2T72eJME.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tOd2T72eJME.mp4/tOd2T72eJME.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tOd2T72eJME.m3u8/tOd2T72eJME.m3u8"}, "slug": "ratio-word-problem-exercise-example-2", "video_id": "tOd2T72eJME", "youtube_id": "tOd2T72eJME", "readable_id": "ratio-word-problem-exercise-example-2"}, "Rm6UdfRs3gw": {"duration": 416, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/compound-interest-tutorial/introduction-to-compound-interest/", "keywords": "compound, interest", "id": "Rm6UdfRs3gw", "title": "Introduction to compound interest", "description": "Introduction to compound interest", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Rm6UdfRs3gw.mp4/Rm6UdfRs3gw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Rm6UdfRs3gw.mp4/Rm6UdfRs3gw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Rm6UdfRs3gw.m3u8/Rm6UdfRs3gw.m3u8"}, "slug": "introduction-to-compound-interest", "video_id": "Rm6UdfRs3gw", "youtube_id": "Rm6UdfRs3gw", "readable_id": "introduction-to-compound-interest"}, "0imeUgSxR10": {"duration": 645, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-circle-hyperbola-common-tangent-part-2/", "keywords": "2010, IIT, JEE, Paper, Problem, 45, Circle, Hyperbola, Common, Tangent, Part", "id": "0imeUgSxR10", "title": "IIT JEE circle hyperbola common tangent part 2", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0imeUgSxR10.mp4/0imeUgSxR10.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0imeUgSxR10.mp4/0imeUgSxR10.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0imeUgSxR10.m3u8/0imeUgSxR10.m3u8"}, "slug": "iit-jee-circle-hyperbola-common-tangent-part-2", "video_id": "0imeUgSxR10", "youtube_id": "0imeUgSxR10", "readable_id": "iit-jee-circle-hyperbola-common-tangent-part-2"}, "9YRw0Yk7N8c": {"duration": 394, "path": "khan/computing/computer-science/cryptography/comp-number-theory/time-space-tradeoff/", "keywords": "time space tradeoff, memory limit", "id": "9YRw0Yk7N8c", "title": "Time space tradeoff", "description": "what is our memory limit? How can save time at the expense of space?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9YRw0Yk7N8c.mp4/9YRw0Yk7N8c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9YRw0Yk7N8c.mp4/9YRw0Yk7N8c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9YRw0Yk7N8c.m3u8/9YRw0Yk7N8c.m3u8"}, "slug": "time-space-tradeoff", "video_id": "9YRw0Yk7N8c", "youtube_id": "9YRw0Yk7N8c", "readable_id": "time-space-tradeoff"}, "a5YZ7-JRSUE": {"duration": 252, "path": "khan/math/algebra/two-variable-linear-inequalities/constraining-solutions-of-inequalities/constraining-solutions-to-two-variable-linear-inequalities/", "keywords": "education,online learning,learning,lessons", "id": "a5YZ7-JRSUE", "title": "How to constraint the solution set of a two variable linear inequality (example)", "description": "Sal determines which x-values make the ordered pair (x,-7) a solution of 2x-7y<25. He also solves a similar problem where the inequality is given as a graph.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a5YZ7-JRSUE.mp4/a5YZ7-JRSUE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a5YZ7-JRSUE.mp4/a5YZ7-JRSUE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a5YZ7-JRSUE.m3u8/a5YZ7-JRSUE.m3u8"}, "slug": "constraining-solutions-to-two-variable-linear-inequalities", "video_id": "a5YZ7-JRSUE", "youtube_id": "a5YZ7-JRSUE", "readable_id": "constraining-solutions-to-two-variable-linear-inequalities"}, "XCdvo5fv-W0": {"duration": 496, "path": "khan/science/health-and-medicine/infectious-diseases/influenza/three-types-of-flu/", "keywords": "", "id": "XCdvo5fv-W0", "title": "Three types of flu", "description": "Learn about the three types of influenza virus (Type A, Type B, and Type C) and what makes them differ from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XCdvo5fv-W0.mp4/XCdvo5fv-W0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XCdvo5fv-W0.mp4/XCdvo5fv-W0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XCdvo5fv-W0.m3u8/XCdvo5fv-W0.m3u8"}, "slug": "three-types-of-flu", "video_id": "XCdvo5fv-W0", "youtube_id": "XCdvo5fv-W0", "readable_id": "three-types-of-flu"}, "jHN0BfowL7s": {"duration": 207, "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-madonna-of-the-goldfinch-1505-6/", "keywords": "Raphael, Smarthistory, Art History, Uffizi, Florence", "id": "jHN0BfowL7s", "title": "Raphael, Madonna of the Goldfinch", "description": "Raphael, Madonna of the Goldfinch, 1505-6, oil on panel, 42\" x 30\" (107 x 77 cm), Uffizi, Florence\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jHN0BfowL7s.mp4/jHN0BfowL7s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jHN0BfowL7s.mp4/jHN0BfowL7s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jHN0BfowL7s.m3u8/jHN0BfowL7s.m3u8"}, "slug": "raphael-madonna-of-the-goldfinch-1505-6", "video_id": "jHN0BfowL7s", "youtube_id": "jHN0BfowL7s", "readable_id": "raphael-madonna-of-the-goldfinch-1505-6"}, "Q9t1LghwdGc": {"duration": 662, "path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/example-of-closed-line-integral-of-conservative-field/", "keywords": "line, integral, conservative, field, vector, calculus", "id": "Q9t1LghwdGc", "title": "Example of closed line integral of conservative field", "description": "Example of taking a closed line integral of a conservative field", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q9t1LghwdGc.mp4/Q9t1LghwdGc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q9t1LghwdGc.mp4/Q9t1LghwdGc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q9t1LghwdGc.m3u8/Q9t1LghwdGc.m3u8"}, "slug": "example-of-closed-line-integral-of-conservative-field", "video_id": "Q9t1LghwdGc", "youtube_id": "Q9t1LghwdGc", "readable_id": "example-of-closed-line-integral-of-conservative-field"}, "vStLGBTKMBQ": {"duration": 391, "path": "khan/test-prep/mcat/society-and-culture/social-structures/institutions-education-family-religion/", "keywords": "", "id": "vStLGBTKMBQ", "title": "Social institutions - education, family, and religion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vStLGBTKMBQ.mp4/vStLGBTKMBQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vStLGBTKMBQ.mp4/vStLGBTKMBQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vStLGBTKMBQ.m3u8/vStLGBTKMBQ.m3u8"}, "slug": "institutions-education-family-religion", "video_id": "vStLGBTKMBQ", "youtube_id": "vStLGBTKMBQ", "readable_id": "institutions-education-family-religion"}, "BIGX05Mp5nw": {"duration": 225, "path": "khan/math/arithmetic/multiplication-division/long_division/introduction-to-remainders/", "keywords": "", "id": "BIGX05Mp5nw", "title": "Dividing numbers: intro to remainders", "description": "Do you like leftovers? (personally, we think they are delicious!). Those leftovers are like remainders in divisions problems. They're not bad. They just...are.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BIGX05Mp5nw.mp4/BIGX05Mp5nw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BIGX05Mp5nw.mp4/BIGX05Mp5nw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BIGX05Mp5nw.m3u8/BIGX05Mp5nw.m3u8"}, "slug": "introduction-to-remainders", "video_id": "BIGX05Mp5nw", "youtube_id": "BIGX05Mp5nw", "readable_id": "introduction-to-remainders"}, "FEF6PxWOvsk": {"duration": 629, "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/light-fundamental-forces/four-fundamental-forces/", "keywords": "Gravity, Weak", "id": "FEF6PxWOvsk", "title": "Four fundamental forces", "description": "Gravity, Weak, Electromagnetic and Strong", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FEF6PxWOvsk.mp4/FEF6PxWOvsk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FEF6PxWOvsk.mp4/FEF6PxWOvsk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FEF6PxWOvsk.m3u8/FEF6PxWOvsk.m3u8"}, "slug": "four-fundamental-forces", "video_id": "FEF6PxWOvsk", "youtube_id": "FEF6PxWOvsk", "readable_id": "four-fundamental-forces"}, "oTKVXJ7TcbA": {"duration": 130, "path": "khan/math/pre-algebra/order-of-operations/arithmetic_properties/associative-law-of-addition/", "keywords": "U01_L4_T1_we5, Associative, Law, of, Addition, CC_1_OA_3", "id": "oTKVXJ7TcbA", "title": "Associative law of addition", "description": "Associative Law of Addition", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oTKVXJ7TcbA.mp4/oTKVXJ7TcbA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oTKVXJ7TcbA.mp4/oTKVXJ7TcbA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oTKVXJ7TcbA.m3u8/oTKVXJ7TcbA.m3u8"}, "slug": "associative-law-of-addition", "video_id": "oTKVXJ7TcbA", "youtube_id": "oTKVXJ7TcbA", "readable_id": "associative-law-of-addition"}, "jUUJSOM1ihU": {"duration": 690, "path": "khan/science/biology/macromolecules/nucleic-acids/molecular-structure-of-rna/", "keywords": "education,online learning,learning,lessons,RNA,DNA,Uracil", "id": "jUUJSOM1ihU", "title": "Molecular structure of RNA", "description": "Molecular structure of RNA", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jUUJSOM1ihU.mp4/jUUJSOM1ihU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jUUJSOM1ihU.mp4/jUUJSOM1ihU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jUUJSOM1ihU.m3u8/jUUJSOM1ihU.m3u8"}, "slug": "molecular-structure-of-rna", "video_id": "jUUJSOM1ihU", "youtube_id": "jUUJSOM1ihU", "readable_id": "molecular-structure-of-rna"}, "RqUfUxaY6HU": {"duration": 185, "path": "khan/partner-content/pixar/sets/sets1/sets-6/", "keywords": "", "id": "RqUfUxaY6HU", "title": "6. Composite transformations", "description": "Time to get a little mathy. Let's look at the general form for any transformation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RqUfUxaY6HU.mp4/RqUfUxaY6HU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RqUfUxaY6HU.mp4/RqUfUxaY6HU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RqUfUxaY6HU.m3u8/RqUfUxaY6HU.m3u8"}, "slug": "sets-6", "video_id": "RqUfUxaY6HU", "youtube_id": "RqUfUxaY6HU", "readable_id": "sets-6"}, "CYmrwLZD2HI": {"duration": 536, "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software/sscc-blended-typessoftware/", "keywords": "", "id": "CYmrwLZD2HI", "title": "The different types of software used in blended learning", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CYmrwLZD2HI.mp4/CYmrwLZD2HI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CYmrwLZD2HI.mp4/CYmrwLZD2HI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CYmrwLZD2HI.m3u8/CYmrwLZD2HI.m3u8"}, "slug": "sscc-blended-typessoftware", "video_id": "CYmrwLZD2HI", "youtube_id": "CYmrwLZD2HI", "readable_id": "sscc-blended-typessoftware"}, "LwhJVURumAA": {"duration": 414, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/properties-to-find-sum/", "keywords": "", "id": "LwhJVURumAA", "title": "Leveraging properties of series to find sum", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LwhJVURumAA.mp4/LwhJVURumAA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LwhJVURumAA.mp4/LwhJVURumAA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LwhJVURumAA.m3u8/LwhJVURumAA.m3u8"}, "slug": "properties-to-find-sum", "video_id": "LwhJVURumAA", "youtube_id": "LwhJVURumAA", "readable_id": "properties-to-find-sum"}, "PQZUIGzinZA": {"duration": 453, "path": "khan/humanities/renaissance-reformation/northern/holbein/hans-holbein-the-younger-the-ambassadors-1533/", "keywords": "holbein, ambassadors, GAP, Hans Holbein the Younger, 1533, National Gallery, London, Khan Academy, smarthistory, art history, Google Art Project, OER, painting, lute, Anamorphosis, skull", "id": "PQZUIGzinZA", "title": "Holbein the Younger, the Ambassadors", "description": "Hans Holbein the Younger, The Ambassadors, 1533, oil on oak, 207 x 209.5 cm (The National Gallery, London). View this work up close on the Google Art Project.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PQZUIGzinZA.mp4/PQZUIGzinZA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PQZUIGzinZA.mp4/PQZUIGzinZA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PQZUIGzinZA.m3u8/PQZUIGzinZA.m3u8"}, "slug": "hans-holbein-the-younger-the-ambassadors-1533", "video_id": "PQZUIGzinZA", "youtube_id": "PQZUIGzinZA", "readable_id": "hans-holbein-the-younger-the-ambassadors-1533"}, "mMCcBsSAlF4": {"duration": 658, "path": "khan/science/biology/cellular-molecular-biology/meiosis/phases-of-meiosis-ii/", "keywords": "", "id": "mMCcBsSAlF4", "title": "Phases of Meiosis II", "description": "Phases of Meiosis II", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mMCcBsSAlF4.mp4/mMCcBsSAlF4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mMCcBsSAlF4.mp4/mMCcBsSAlF4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mMCcBsSAlF4.m3u8/mMCcBsSAlF4.m3u8"}, "slug": "phases-of-meiosis-ii", "video_id": "mMCcBsSAlF4", "youtube_id": "mMCcBsSAlF4", "readable_id": "phases-of-meiosis-ii"}, "T_c343e0msA": {"duration": 583, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/diagnosis-treatment-and-prevention-of-syphilis/", "keywords": "", "id": "T_c343e0msA", "title": "Diagnosis, treatment, and prevention of syphilis", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T_c343e0msA.mp4/T_c343e0msA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T_c343e0msA.mp4/T_c343e0msA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T_c343e0msA.m3u8/T_c343e0msA.m3u8"}, "slug": "diagnosis-treatment-and-prevention-of-syphilis", "video_id": "T_c343e0msA", "youtube_id": "T_c343e0msA", "readable_id": "diagnosis-treatment-and-prevention-of-syphilis"}, "lSwsAFgWqR8": {"duration": 308, "path": "khan/math/differential-calculus/limits_topic/algebraic-limits/limit-properties/", "keywords": "", "id": "lSwsAFgWqR8", "title": "Limit properties", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lSwsAFgWqR8.mp4/lSwsAFgWqR8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lSwsAFgWqR8.mp4/lSwsAFgWqR8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lSwsAFgWqR8.m3u8/lSwsAFgWqR8.m3u8"}, "slug": "limit-properties", "video_id": "lSwsAFgWqR8", "youtube_id": "lSwsAFgWqR8", "readable_id": "limit-properties"}, "JgYlogdtJDo": {"duration": 542, "path": "khan/science/biology/properties-of-carbon/carbon/carbon-as-a-building-block-of-life/", "keywords": "education,online learning,learning,lessons,hydrocarbons,Carbon (Chemical Element),organic molecules", "id": "JgYlogdtJDo", "title": "Carbon as a building block of life", "description": "Carbon as a building block of life.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JgYlogdtJDo.mp4/JgYlogdtJDo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JgYlogdtJDo.mp4/JgYlogdtJDo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JgYlogdtJDo.m3u8/JgYlogdtJDo.m3u8"}, "slug": "carbon-as-a-building-block-of-life", "video_id": "JgYlogdtJDo", "youtube_id": "JgYlogdtJDo", "readable_id": "carbon-as-a-building-block-of-life"}, "Bs2mEx4WZPY": {"duration": 351, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/penny-battery/build-your-own-penny-battery-materials-steps/", "keywords": "", "id": "Bs2mEx4WZPY", "title": "Build your own penny battery: Materials & steps", "description": "In this video, you'll find the materials and tools you'll need to build your own penny battery, as well as all the necessary steps.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Bs2mEx4WZPY.mp4/Bs2mEx4WZPY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Bs2mEx4WZPY.mp4/Bs2mEx4WZPY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Bs2mEx4WZPY.m3u8/Bs2mEx4WZPY.m3u8"}, "slug": "build-your-own-penny-battery-materials-steps", "video_id": "Bs2mEx4WZPY", "youtube_id": "Bs2mEx4WZPY", "readable_id": "build-your-own-penny-battery-materials-steps"}, "bRwJ-QCz9XU": {"duration": 256, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/rational-equations/", "keywords": "u15_l2_t1_we1, Rational, Equations, CC_6_EE_6, CC_7_EE_4_a", "id": "bRwJ-QCz9XU", "title": "How to solve an equation with two rational expressions (example)", "description": "Sal solves the equation 4/(p-1)=5/(p+3).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bRwJ-QCz9XU.mp4/bRwJ-QCz9XU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bRwJ-QCz9XU.mp4/bRwJ-QCz9XU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bRwJ-QCz9XU.m3u8/bRwJ-QCz9XU.m3u8"}, "slug": "rational-equations", "video_id": "bRwJ-QCz9XU", "youtube_id": "bRwJ-QCz9XU", "readable_id": "rational-equations"}, "m4mrd7sHCPM": {"duration": 209, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-call-parity/", "keywords": "Put-Call, Parity", "id": "m4mrd7sHCPM", "title": "Put-call parity", "description": "Put-Call Parity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m4mrd7sHCPM.mp4/m4mrd7sHCPM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m4mrd7sHCPM.mp4/m4mrd7sHCPM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m4mrd7sHCPM.m3u8/m4mrd7sHCPM.m3u8"}, "slug": "put-call-parity", "video_id": "m4mrd7sHCPM", "youtube_id": "m4mrd7sHCPM", "readable_id": "put-call-parity"}, "WGMn16TDTjE": {"duration": 563, "path": "khan/computing/computer-science/cryptography/random-algorithms-probability/randomized-algorithms-prime-adventure-part-8/", "keywords": "random algorithms, randomized, algorithms", "id": "WGMn16TDTjE", "title": "Randomized algorithms (intro)", "description": "How could random numbers speed up a decision algorithm?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WGMn16TDTjE.mp4/WGMn16TDTjE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WGMn16TDTjE.mp4/WGMn16TDTjE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WGMn16TDTjE.m3u8/WGMn16TDTjE.m3u8"}, "slug": "randomized-algorithms-prime-adventure-part-8", "video_id": "WGMn16TDTjE", "youtube_id": "WGMn16TDTjE", "readable_id": "randomized-algorithms-prime-adventure-part-8"}, "kw_4Loo1HR4": {"duration": 606, "path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/conservation-of-energy/", "keywords": "conservation, of, energy, kinetic, potential, physics, velocity", "id": "kw_4Loo1HR4", "title": "Conservation of energy", "description": "Using the law of conservation of energy to see how potential energy is converted into kinetic energy", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kw_4Loo1HR4.mp4/kw_4Loo1HR4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kw_4Loo1HR4.mp4/kw_4Loo1HR4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kw_4Loo1HR4.m3u8/kw_4Loo1HR4.m3u8"}, "slug": "conservation-of-energy", "video_id": "kw_4Loo1HR4", "youtube_id": "kw_4Loo1HR4", "readable_id": "conservation-of-energy"}, "qzvatDIDXwo": {"duration": 657, "path": "khan/science/biology/energy-and-enzymes/energy-in-metabolism/introduction-to-energy/", "keywords": "education,online learning,learning,lessons,energy,work,joules,law of conservation of energy", "id": "qzvatDIDXwo", "title": "Introduction to energy", "description": "Introduction to energy: potential and kinetic energy. The law of conservation of energy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qzvatDIDXwo.mp4/qzvatDIDXwo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qzvatDIDXwo.mp4/qzvatDIDXwo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qzvatDIDXwo.m3u8/qzvatDIDXwo.m3u8"}, "slug": "introduction-to-energy", "video_id": "qzvatDIDXwo", "youtube_id": "qzvatDIDXwo", "readable_id": "introduction-to-energy"}, "WY6QG0mZ7uQ": {"duration": 172, "path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-correction-scalar-muliplication-of-row/", "keywords": "linear, algebra, determinant", "id": "WY6QG0mZ7uQ", "title": "(correction) scalar multiplication of row", "description": "Correction of last video showing that the determinant when one row is multiplied by a scalar is equal to the scalar times the determinant", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WY6QG0mZ7uQ.mp4/WY6QG0mZ7uQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WY6QG0mZ7uQ.mp4/WY6QG0mZ7uQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WY6QG0mZ7uQ.m3u8/WY6QG0mZ7uQ.m3u8"}, "slug": "linear-algebra-correction-scalar-muliplication-of-row", "video_id": "WY6QG0mZ7uQ", "youtube_id": "WY6QG0mZ7uQ", "readable_id": "linear-algebra-correction-scalar-muliplication-of-row"}, "x8pEjhCc5ug": {"duration": 588, "path": "khan/test-prep/gmat/problem-solving/gmat-math-36/", "keywords": "gmat, math, problem, solving", "id": "x8pEjhCc5ug", "title": "GMAT: Math 36", "description": "180(simpler)-184, pgs. 176-177", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x8pEjhCc5ug.mp4/x8pEjhCc5ug.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x8pEjhCc5ug.mp4/x8pEjhCc5ug.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x8pEjhCc5ug.m3u8/x8pEjhCc5ug.m3u8"}, "slug": "gmat-math-36", "video_id": "x8pEjhCc5ug", "youtube_id": "x8pEjhCc5ug", "readable_id": "gmat-math-36"}, "b1QFKLZC11U": {"duration": 639, "path": "khan/science/physics/electricity-magnetism/magnets-magnetic/magnetism-4/", "keywords": "physics, magnetism", "id": "b1QFKLZC11U", "title": "Magnetic force on a proton example (part 2)", "description": "Sal determines the radius of the circle traveled by the proton in the previous example by using the formula for centripetal acceleration.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b1QFKLZC11U.mp4/b1QFKLZC11U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b1QFKLZC11U.mp4/b1QFKLZC11U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b1QFKLZC11U.m3u8/b1QFKLZC11U.m3u8"}, "slug": "magnetism-4", "video_id": "b1QFKLZC11U", "youtube_id": "b1QFKLZC11U", "readable_id": "magnetism-4"}, "9Xncz_mMc5g": {"duration": 360, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/galvanic-cell-voltaic-cell/", "keywords": "", "id": "9Xncz_mMc5g", "title": "Introduction to galvanic/voltaic cells", "description": "How to use a redox reaction to construct a galvanic/voltaic cell to produce a flow of current.. Shows the flow of electrons and ions, and explains the role of the salt bridge.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9Xncz_mMc5g.mp4/9Xncz_mMc5g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9Xncz_mMc5g.mp4/9Xncz_mMc5g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9Xncz_mMc5g.m3u8/9Xncz_mMc5g.m3u8"}, "slug": "galvanic-cell-voltaic-cell", "video_id": "9Xncz_mMc5g", "youtube_id": "9Xncz_mMc5g", "readable_id": "galvanic-cell-voltaic-cell"}, "eIfQ4GfSz3U": {"duration": 772, "path": "khan/humanities/history/euro-hist/middle-east-20th-century/sykes-picot-agreement-and-the-balfour-declaration/", "keywords": "", "id": "eIfQ4GfSz3U", "title": "Sykes-Picot Agreement and the Balfour Declaration", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eIfQ4GfSz3U.mp4/eIfQ4GfSz3U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eIfQ4GfSz3U.mp4/eIfQ4GfSz3U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eIfQ4GfSz3U.m3u8/eIfQ4GfSz3U.m3u8"}, "slug": "sykes-picot-agreement-and-the-balfour-declaration", "video_id": "eIfQ4GfSz3U", "youtube_id": "eIfQ4GfSz3U", "readable_id": "sykes-picot-agreement-and-the-balfour-declaration"}, "F00vnE37pIE": {"duration": 311, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/sir-edward-burne-jones-hope-1896/", "keywords": "Burne-Jones, Hope, 1896, Museum of Fine Arts, Boston, British, allegory, Google Art Project, Smarthistory, Khan Academy, OER, art history", "id": "F00vnE37pIE", "title": "Burne-Jones, Hope", "description": "Sir Edward Coley Burne-Jones, Hope, 1896, 179 x 63.5 cm, oil on canvas (Museum of Fine Arts, Boston)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F00vnE37pIE.mp4/F00vnE37pIE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F00vnE37pIE.mp4/F00vnE37pIE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F00vnE37pIE.m3u8/F00vnE37pIE.m3u8"}, "slug": "sir-edward-burne-jones-hope-1896", "video_id": "F00vnE37pIE", "youtube_id": "F00vnE37pIE", "readable_id": "sir-edward-burne-jones-hope-1896"}, "iqpIspc38TA": {"duration": 218, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2008-may-8-6/", "keywords": "", "id": "iqpIspc38TA", "title": "6 Carton quantity", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iqpIspc38TA.mp4/iqpIspc38TA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iqpIspc38TA.mp4/iqpIspc38TA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iqpIspc38TA.m3u8/iqpIspc38TA.m3u8"}, "slug": "sat-2008-may-8-6", "video_id": "iqpIspc38TA", "youtube_id": "iqpIspc38TA", "readable_id": "sat-2008-may-8-6"}, "cppxO67e6eo": {"duration": 887, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/introduction-to-the-price-to-earnings-ratio/", "keywords": "investing, price, earnings, ratio, finance, stock", "id": "cppxO67e6eo", "title": "Introduction to the price-to-earnings ratio", "description": "Price to Earnings Ration (or P/E ratio).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cppxO67e6eo.mp4/cppxO67e6eo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cppxO67e6eo.mp4/cppxO67e6eo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cppxO67e6eo.m3u8/cppxO67e6eo.m3u8"}, "slug": "introduction-to-the-price-to-earnings-ratio", "video_id": "cppxO67e6eo", "youtube_id": "cppxO67e6eo", "readable_id": "introduction-to-the-price-to-earnings-ratio"}, "SkMNREAMNvc": {"duration": 158, "path": "khan/math/algebra/systems-of-linear-equations/introduction-to-systems-of-linear-equations/testing-a-solution-for-a-system-of-equations/", "keywords": "u14_l1_t1_we2, Testing, solution, for, system, of, equations, CC_8_EE_8_a", "id": "SkMNREAMNvc", "title": "How to check a solution to a system of equations (example)", "description": "Sal checks whether (-1,7) is a solution of the system: x+2y=13 and 3x-y=-11.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SkMNREAMNvc.mp4/SkMNREAMNvc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SkMNREAMNvc.mp4/SkMNREAMNvc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SkMNREAMNvc.m3u8/SkMNREAMNvc.m3u8"}, "slug": "testing-a-solution-for-a-system-of-equations", "video_id": "SkMNREAMNvc", "youtube_id": "SkMNREAMNvc", "readable_id": "testing-a-solution-for-a-system-of-equations"}, "qKe9sZQPV-Y": {"duration": 359, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/pathophysiology-of-chlamydia/", "keywords": "", "id": "qKe9sZQPV-Y", "title": "Pathophysiology of chlamydia", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qKe9sZQPV-Y.mp4/qKe9sZQPV-Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qKe9sZQPV-Y.mp4/qKe9sZQPV-Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qKe9sZQPV-Y.m3u8/qKe9sZQPV-Y.m3u8"}, "slug": "pathophysiology-of-chlamydia", "video_id": "qKe9sZQPV-Y", "youtube_id": "qKe9sZQPV-Y", "readable_id": "pathophysiology-of-chlamydia"}, "4QwfrTNuwE4": {"duration": 255, "path": "khan/humanities/global-culture/conceptual-performance/beuys-table-with-accumulator-tisch-mit-aggregat-1958-85/", "keywords": "Beuys, Tate Modern, Smarthistory, Art History", "id": "4QwfrTNuwE4", "title": "Joseph Beuys, Table with Accumulator", "description": "Joseph Beuys, Table with Accumulator (Tisch mit Aggregat), 1958-85, Tate Modern, London. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4QwfrTNuwE4.mp4/4QwfrTNuwE4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4QwfrTNuwE4.mp4/4QwfrTNuwE4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4QwfrTNuwE4.m3u8/4QwfrTNuwE4.m3u8"}, "slug": "beuys-table-with-accumulator-tisch-mit-aggregat-1958-85", "video_id": "4QwfrTNuwE4", "youtube_id": "4QwfrTNuwE4", "readable_id": "beuys-table-with-accumulator-tisch-mit-aggregat-1958-85"}, "tnkPY4UqJ44": {"duration": 216, "path": "khan/math/pre-algebra/fractions-pre-alg/div-fractions-fractions-pre-alg/dividing-fractions-example/", "keywords": "U02_L2_T3_we2, Dividing, Fractions, CC_5_NF_7, CC_6_NS_1, CC_7_NS_2, CC_7_NS_2_c", "id": "tnkPY4UqJ44", "title": "Dividing fractions example 2", "description": "Let's take another stab at dividing two fractions. This time the answer should be a mixed number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tnkPY4UqJ44.mp4/tnkPY4UqJ44.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tnkPY4UqJ44.mp4/tnkPY4UqJ44.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tnkPY4UqJ44.m3u8/tnkPY4UqJ44.m3u8"}, "slug": "dividing-fractions-example", "video_id": "tnkPY4UqJ44", "youtube_id": "tnkPY4UqJ44", "readable_id": "dividing-fractions-example"}, "ZTKAn9YNbNY": {"duration": 265, "path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/interpreting-system-of-inequalities-in-context/", "keywords": "education,online learning,learning,lessons", "id": "ZTKAn9YNbNY", "title": "How to solve a word problem that uses a system of linear inequalities (example)", "description": "Sal is given a system of linear inequalities that models a context about making chairs and tables, and answers a question about the solution set of the system in terms of the context.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZTKAn9YNbNY.mp4/ZTKAn9YNbNY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZTKAn9YNbNY.mp4/ZTKAn9YNbNY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZTKAn9YNbNY.m3u8/ZTKAn9YNbNY.m3u8"}, "slug": "interpreting-system-of-inequalities-in-context", "video_id": "ZTKAn9YNbNY", "youtube_id": "ZTKAn9YNbNY", "readable_id": "interpreting-system-of-inequalities-in-context"}, "Hp46Y6j_Qdc": {"duration": 133, "path": "khan/science/discoveries-projects/robots/spider_bot/1-spider-parts-and-tools/", "keywords": "spider bot, make, diy, hack, building, hands-on projects, robots", "id": "Hp46Y6j_Qdc", "title": "Spider parts and tools", "description": "In this video we review some of the parts and tools you will need to build a spider bot.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hp46Y6j_Qdc.mp4/Hp46Y6j_Qdc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hp46Y6j_Qdc.mp4/Hp46Y6j_Qdc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hp46Y6j_Qdc.m3u8/Hp46Y6j_Qdc.m3u8"}, "slug": "1-spider-parts-and-tools", "video_id": "Hp46Y6j_Qdc", "youtube_id": "Hp46Y6j_Qdc", "readable_id": "1-spider-parts-and-tools"}, "Z_NHrwK6ALE": {"duration": 126, "path": "khan/math/pre-algebra/decimals-pre-alg/dividing-decimals-pre-alg/dividing-a-decimal-by-a-whole-number/", "keywords": "", "id": "Z_NHrwK6ALE", "title": "Dividing a decimal by a whole number", "description": "You're doing great. Now we want to mix it up a little: divide a decimal by a whole number. Follow along.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z_NHrwK6ALE.mp4/Z_NHrwK6ALE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z_NHrwK6ALE.mp4/Z_NHrwK6ALE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z_NHrwK6ALE.m3u8/Z_NHrwK6ALE.m3u8"}, "slug": "dividing-a-decimal-by-a-whole-number", "video_id": "Z_NHrwK6ALE", "youtube_id": "Z_NHrwK6ALE", "readable_id": "dividing-a-decimal-by-a-whole-number"}, "vD2WJTIEVv0": {"duration": 470, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/are-hedge-funds-bad/", "keywords": "risk, hedge, fund", "id": "vD2WJTIEVv0", "title": "Are hedge funds bad?", "description": "Thinking about how hedge funds are different from other institutions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vD2WJTIEVv0.mp4/vD2WJTIEVv0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vD2WJTIEVv0.mp4/vD2WJTIEVv0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vD2WJTIEVv0.m3u8/vD2WJTIEVv0.m3u8"}, "slug": "are-hedge-funds-bad", "video_id": "vD2WJTIEVv0", "youtube_id": "vD2WJTIEVv0", "readable_id": "are-hedge-funds-bad"}, "PaA0mLVQd3k": {"duration": 578, "path": "khan/test-prep/mcat/individuals-and-society/attributing-behavior-to-persons-or-situations/self-concept-self-identity-social-identity/", "keywords": "", "id": "PaA0mLVQd3k", "title": "Self concept, self identity, and social identity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PaA0mLVQd3k.mp4/PaA0mLVQd3k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PaA0mLVQd3k.mp4/PaA0mLVQd3k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PaA0mLVQd3k.m3u8/PaA0mLVQd3k.m3u8"}, "slug": "self-concept-self-identity-social-identity", "video_id": "PaA0mLVQd3k", "youtube_id": "PaA0mLVQd3k", "readable_id": "self-concept-self-identity-social-identity"}, "P4s0bnrRm4M": {"duration": 49, "path": "khan/college-admissions/get-started/importance-of-college/ss-college-brings-new-friends-learning-and-freedom/", "keywords": "", "id": "P4s0bnrRm4M", "title": "Student story: College brings new friends, learning, and freedom", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P4s0bnrRm4M.mp4/P4s0bnrRm4M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P4s0bnrRm4M.mp4/P4s0bnrRm4M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P4s0bnrRm4M.m3u8/P4s0bnrRm4M.m3u8"}, "slug": "ss-college-brings-new-friends-learning-and-freedom", "video_id": "P4s0bnrRm4M", "youtube_id": "P4s0bnrRm4M", "readable_id": "ss-college-brings-new-friends-learning-and-freedom"}, "20N53khArXA": {"duration": 488, "path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/gestalt-principles/", "keywords": "", "id": "20N53khArXA", "title": "Gestalt principles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/20N53khArXA.mp4/20N53khArXA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/20N53khArXA.mp4/20N53khArXA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/20N53khArXA.m3u8/20N53khArXA.m3u8"}, "slug": "gestalt-principles", "video_id": "20N53khArXA", "youtube_id": "20N53khArXA", "readable_id": "gestalt-principles"}, "w6Tgu14VSLY": {"duration": 250, "path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/duccio-maesta-back-1308-11/", "keywords": "Duccio, Maesta, back, v2", "id": "w6Tgu14VSLY", "title": "Duccio, Maesta (back)", "description": "Duccio, Maesta (back), 1308-11 (Museo dell'Opera Metropolitana del Duomo, Siena) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w6Tgu14VSLY.mp4/w6Tgu14VSLY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w6Tgu14VSLY.mp4/w6Tgu14VSLY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w6Tgu14VSLY.m3u8/w6Tgu14VSLY.m3u8"}, "slug": "duccio-maesta-back-1308-11", "video_id": "w6Tgu14VSLY", "youtube_id": "w6Tgu14VSLY", "readable_id": "duccio-maesta-back-1308-11"}, "PIdgHAOoIKs": {"duration": 230, "path": "khan/college-admissions/making-high-school-count/high-school-classes/making-the-most-of-high-school-classes/", "keywords": "", "id": "PIdgHAOoIKs", "title": "Making the most of high school classes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PIdgHAOoIKs.mp4/PIdgHAOoIKs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PIdgHAOoIKs.mp4/PIdgHAOoIKs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PIdgHAOoIKs.m3u8/PIdgHAOoIKs.m3u8"}, "slug": "making-the-most-of-high-school-classes", "video_id": "PIdgHAOoIKs", "youtube_id": "PIdgHAOoIKs", "readable_id": "making-the-most-of-high-school-classes"}, "G2JdRB3bdFM": {"duration": 535, "path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/deflategate-ideal-gas-law/", "keywords": "", "id": "G2JdRB3bdFM", "title": "Deflate gate", "description": "Using the ideal gas equation to calculate the change in air pressure in a football at different temperatures.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/G2JdRB3bdFM.mp4/G2JdRB3bdFM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/G2JdRB3bdFM.mp4/G2JdRB3bdFM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/G2JdRB3bdFM.m3u8/G2JdRB3bdFM.m3u8"}, "slug": "deflategate-ideal-gas-law", "video_id": "G2JdRB3bdFM", "youtube_id": "G2JdRB3bdFM", "readable_id": "deflategate-ideal-gas-law"}, "_yv3BrPt-cs": {"duration": 326, "path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-1-3/", "keywords": "CAHSEE, practice, california, high, school, exit, examination", "id": "_yv3BrPt-cs", "title": "CAHSEE practice: Problems 1-3", "description": "CAHSEE Practice: Problems 1-3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_yv3BrPt-cs.mp4/_yv3BrPt-cs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_yv3BrPt-cs.mp4/_yv3BrPt-cs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_yv3BrPt-cs.m3u8/_yv3BrPt-cs.m3u8"}, "slug": "cahsee-practice-problems-1-3", "video_id": "_yv3BrPt-cs", "youtube_id": "_yv3BrPt-cs", "readable_id": "cahsee-practice-problems-1-3"}, "ksK2mbPgiLI": {"duration": 822, "path": "khan/humanities/music/music-masterpieces-old-new/ludwig-van-beethoven-music/beethoven-fifth-movements-3-4/", "keywords": "", "id": "ksK2mbPgiLI", "title": "Ludwig van Beethoven: Symphony No. 5, analysis by Gerard Schwarz (part 3 & 4)", "description": "\u200bWatch the complete performance at here starting at 10:40.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ksK2mbPgiLI.mp4/ksK2mbPgiLI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ksK2mbPgiLI.mp4/ksK2mbPgiLI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ksK2mbPgiLI.m3u8/ksK2mbPgiLI.m3u8"}, "slug": "beethoven-fifth-movements-3-4", "video_id": "ksK2mbPgiLI", "youtube_id": "ksK2mbPgiLI", "readable_id": "beethoven-fifth-movements-3-4"}, "jRYEqOOrjH8": {"duration": 395, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/welcome-to-the-reproductive-system/", "keywords": "", "id": "jRYEqOOrjH8", "title": "Welcome to the reproductive system", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jRYEqOOrjH8.mp4/jRYEqOOrjH8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jRYEqOOrjH8.mp4/jRYEqOOrjH8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jRYEqOOrjH8.m3u8/jRYEqOOrjH8.m3u8"}, "slug": "welcome-to-the-reproductive-system", "video_id": "jRYEqOOrjH8", "youtube_id": "jRYEqOOrjH8", "readable_id": "welcome-to-the-reproductive-system"}, "XFhntPxow0U": {"duration": 558, "path": "khan/science/physics/linear-momentum/momentum-tutorial/introduction-to-momentum/", "keywords": "physics, momentum, impulse, force, acceleration, velocity", "id": "XFhntPxow0U", "title": "Introduction to momentum", "description": "What momentum is. A simple problem involving momentum.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XFhntPxow0U.mp4/XFhntPxow0U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XFhntPxow0U.mp4/XFhntPxow0U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XFhntPxow0U.m3u8/XFhntPxow0U.m3u8"}, "slug": "introduction-to-momentum", "video_id": "XFhntPxow0U", "youtube_id": "XFhntPxow0U", "readable_id": "introduction-to-momentum"}, "3B73j1tKkpI": {"duration": 666, "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/pathophysiology-type-i-diabetes/", "keywords": "", "id": "3B73j1tKkpI", "title": "Pathophysiology - Type I diabetes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3B73j1tKkpI.mp4/3B73j1tKkpI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3B73j1tKkpI.mp4/3B73j1tKkpI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3B73j1tKkpI.m3u8/3B73j1tKkpI.m3u8"}, "slug": "pathophysiology-type-i-diabetes", "video_id": "3B73j1tKkpI", "youtube_id": "3B73j1tKkpI", "readable_id": "pathophysiology-type-i-diabetes"}, "DFPBdbx0vFc": {"duration": 532, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-9-more-on-reserve-ratios-bad-sound/", "keywords": "banking, reserve, ratio, lending", "id": "DFPBdbx0vFc", "title": "Banking 9: More on reserve ratios (bad sound)", "description": "Seeing how reserve ratios limit how much lending I can do.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DFPBdbx0vFc.mp4/DFPBdbx0vFc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DFPBdbx0vFc.mp4/DFPBdbx0vFc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DFPBdbx0vFc.m3u8/DFPBdbx0vFc.m3u8"}, "slug": "banking-9-more-on-reserve-ratios-bad-sound", "video_id": "DFPBdbx0vFc", "youtube_id": "DFPBdbx0vFc", "readable_id": "banking-9-more-on-reserve-ratios-bad-sound"}, "KdfSUbEFums": {"duration": 119, "path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/expressions-with-two-variables/", "keywords": "", "id": "KdfSUbEFums", "title": "Expressions with two variables", "description": "Basics of expression with two variables", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KdfSUbEFums.mp4/KdfSUbEFums.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KdfSUbEFums.mp4/KdfSUbEFums.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KdfSUbEFums.m3u8/KdfSUbEFums.m3u8"}, "slug": "expressions-with-two-variables", "video_id": "KdfSUbEFums", "youtube_id": "KdfSUbEFums", "readable_id": "expressions-with-two-variables"}, "-LgtilBrA4g": {"duration": 179, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/pre-raphaelites-curators-choice-millaiss-isabella/", "keywords": "Pre-raphaelite, Tate, ", "id": "-LgtilBrA4g", "title": "Pre-Raphaelites: Curator's choice - Millais's Isabella", "description": "Curator Jason Rosenfeld reveals the story behind John Everett Millais's painting Isabella and explains why this historical work is inherently modern. Millais's Isabella is one of over 150 works currently on show at Tate Britain in the exhibition Pre-Raphaelites: Victorian Avant-Garde. Pre-Raphaelites: Victorian Avant-Garde is at Tate Britain (2013)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-LgtilBrA4g.mp4/-LgtilBrA4g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-LgtilBrA4g.mp4/-LgtilBrA4g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-LgtilBrA4g.m3u8/-LgtilBrA4g.m3u8"}, "slug": "pre-raphaelites-curators-choice-millaiss-isabella", "video_id": "-LgtilBrA4g", "youtube_id": "-LgtilBrA4g", "readable_id": "pre-raphaelites-curators-choice-millaiss-isabella"}, "__gi413xGC4": {"duration": 1050, "path": "khan/science/physics/forces-newtons-laws/normal-contact-force/more-on-normal-force/", "keywords": "Force (Dimension),Normal Force,Physics (Field Of Study)", "id": "__gi413xGC4", "title": "More on Normal force", "description": "David explains how to deal with more complicated normal force problems, and the common misconceptions when dealing with the normal force.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/__gi413xGC4.mp4/__gi413xGC4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/__gi413xGC4.mp4/__gi413xGC4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/__gi413xGC4.m3u8/__gi413xGC4.m3u8"}, "slug": "more-on-normal-force", "video_id": "__gi413xGC4", "youtube_id": "__gi413xGC4", "readable_id": "more-on-normal-force"}, "MQtsRYPx3v0": {"duration": 281, "path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphing-a-parabola-using-roots-and-vertex/", "keywords": "", "id": "MQtsRYPx3v0", "title": "Graphing a parabola using roots and vertex", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MQtsRYPx3v0.mp4/MQtsRYPx3v0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MQtsRYPx3v0.mp4/MQtsRYPx3v0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MQtsRYPx3v0.m3u8/MQtsRYPx3v0.m3u8"}, "slug": "graphing-a-parabola-using-roots-and-vertex", "video_id": "MQtsRYPx3v0", "youtube_id": "MQtsRYPx3v0", "readable_id": "graphing-a-parabola-using-roots-and-vertex"}, "TQ51Gsb98ec": {"duration": 634, "path": "khan/test-prep/mcat/processing-the-environment/emotion/emotions-cerebral-hemispheres-and-prefrontal-cortex/", "keywords": "", "id": "TQ51Gsb98ec", "title": "Emotions: cerebral hemispheres and prefrontal cortex", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TQ51Gsb98ec.mp4/TQ51Gsb98ec.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TQ51Gsb98ec.mp4/TQ51Gsb98ec.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TQ51Gsb98ec.m3u8/TQ51Gsb98ec.m3u8"}, "slug": "emotions-cerebral-hemispheres-and-prefrontal-cortex", "video_id": "TQ51Gsb98ec", "youtube_id": "TQ51Gsb98ec", "readable_id": "emotions-cerebral-hemispheres-and-prefrontal-cortex"}, "aFV9dk5PsPA": {"duration": 413, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/stroke-work-in-pv-loops-and-boxes/", "keywords": "", "id": "aFV9dk5PsPA", "title": "Stroke work in PV loops and boxes", "description": "Watch how PV loops can be \"morphed\" into PV boxes to make drawing them and thinking about them much simpler. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aFV9dk5PsPA.mp4/aFV9dk5PsPA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aFV9dk5PsPA.mp4/aFV9dk5PsPA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aFV9dk5PsPA.m3u8/aFV9dk5PsPA.m3u8"}, "slug": "stroke-work-in-pv-loops-and-boxes", "video_id": "aFV9dk5PsPA", "youtube_id": "aFV9dk5PsPA", "readable_id": "stroke-work-in-pv-loops-and-boxes"}, "gWSDDopD9sk": {"duration": 598, "path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/limit-examples-part3/", "keywords": "Calculus, limit, math, khan, academy, CC_39336_A-REI_4, CC_39336_A-SSE_3_a, CC_39336_F-IF_8_a", "id": "gWSDDopD9sk", "title": "Limit examples (part 3)", "description": "More limit examples", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gWSDDopD9sk.mp4/gWSDDopD9sk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gWSDDopD9sk.mp4/gWSDDopD9sk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gWSDDopD9sk.m3u8/gWSDDopD9sk.m3u8"}, "slug": "limit-examples-part3", "video_id": "gWSDDopD9sk", "youtube_id": "gWSDDopD9sk", "readable_id": "limit-examples-part3"}, "InrLtU3k3Y8": {"duration": 432, "path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/getting-a-ticket-because-of-the-mean-value-theorem/", "keywords": "", "id": "InrLtU3k3Y8", "title": "Getting a ticket because of the mean value theorem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/InrLtU3k3Y8.mp4/InrLtU3k3Y8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/InrLtU3k3Y8.mp4/InrLtU3k3Y8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/InrLtU3k3Y8.m3u8/InrLtU3k3Y8.m3u8"}, "slug": "getting-a-ticket-because-of-the-mean-value-theorem", "video_id": "InrLtU3k3Y8", "youtube_id": "InrLtU3k3Y8", "readable_id": "getting-a-ticket-because-of-the-mean-value-theorem"}, "znVEFfIdo1o": {"duration": 217, "path": "khan/humanities/renaissance-reformation/northern/durer/albrecht-d-rer-the-large-piece-of-turf-1503/", "keywords": "Albrecht D\u00fcrer, Durer, D\u00fcrer, The Large Piece of Turf, Great Piece of Turf, Meadow, Grass, Weeds, Nature, 1503, watercolor, gouache, Albertina, works on paper, German, Renaissance, art history, botanical, painting, Khan Academy, Smarthistory, Google Art Project, OER", "id": "znVEFfIdo1o", "title": "D\u00fcrer, the Large Piece of Turf", "description": "Albrecht D\u00fcrer, The Large Piece of Turf, 1503, watercolor and gouache on paper, 16-1/8 x 12-5/8 inches / 41 x 32 cm (Graphische Sammlung Albertina, Vienna)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/znVEFfIdo1o.mp4/znVEFfIdo1o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/znVEFfIdo1o.mp4/znVEFfIdo1o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/znVEFfIdo1o.m3u8/znVEFfIdo1o.m3u8"}, "slug": "albrecht-d-rer-the-large-piece-of-turf-1503", "video_id": "znVEFfIdo1o", "youtube_id": "znVEFfIdo1o", "readable_id": "albrecht-d-rer-the-large-piece-of-turf-1503"}, "xR9r38mZjK4": {"duration": 305, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/interpreting_linear_functions/interpreting-linear-graphs/", "keywords": "slope, line, relationship", "id": "xR9r38mZjK4", "title": "Interpreting linear graphs word problems example 1", "description": "Interpreting Linear Graphs", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xR9r38mZjK4.mp4/xR9r38mZjK4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xR9r38mZjK4.mp4/xR9r38mZjK4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xR9r38mZjK4.m3u8/xR9r38mZjK4.m3u8"}, "slug": "interpreting-linear-graphs", "video_id": "xR9r38mZjK4", "youtube_id": "xR9r38mZjK4", "readable_id": "interpreting-linear-graphs"}, "piIcRV2dx7E": {"duration": 320, "path": "khan/math/algebra-basics/core-algebra-foundations/algebra-foundations-order-of-operations/more-complicated-order-of-operations-example/", "keywords": "order, of, operations, CC_6_EE_2_c", "id": "piIcRV2dx7E", "title": "Order of operations: PEMDAS", "description": "Work through another challenging order of operations example with only positive numbers.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/piIcRV2dx7E.mp4/piIcRV2dx7E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/piIcRV2dx7E.mp4/piIcRV2dx7E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/piIcRV2dx7E.m3u8/piIcRV2dx7E.m3u8"}, "slug": "more-complicated-order-of-operations-example", "video_id": "piIcRV2dx7E", "youtube_id": "piIcRV2dx7E", "readable_id": "more-complicated-order-of-operations-example"}, "Q_CljEweGOE": {"duration": 341, "path": "khan/math/pre-algebra/fractions-pre-alg/understanding-fractions-pre-alg/introduction-to-fractions/", "keywords": "", "id": "Q_CljEweGOE", "title": "Introduction to fractions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q_CljEweGOE.mp4/Q_CljEweGOE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q_CljEweGOE.mp4/Q_CljEweGOE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q_CljEweGOE.m3u8/Q_CljEweGOE.m3u8"}, "slug": "introduction-to-fractions", "video_id": "Q_CljEweGOE", "youtube_id": "Q_CljEweGOE", "readable_id": "introduction-to-fractions"}, "BbZB-WBVFSk": {"duration": 655, "path": "khan/test-prep/mcat/chemical-processes/proteins/amino-acid-structure/", "keywords": "", "id": "BbZB-WBVFSk", "title": "Amino acid structure", "description": "In this video, you'll learn about the general structure of amino acids, which include an amine group, a carboxylic acid group, and a unique side chain (R-group) attached to the alpha carbon. In addition, we'll explore where amino acids fit in terms of biological metabolism. By Tracy Kovach.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BbZB-WBVFSk.mp4/BbZB-WBVFSk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BbZB-WBVFSk.mp4/BbZB-WBVFSk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BbZB-WBVFSk.m3u8/BbZB-WBVFSk.m3u8"}, "slug": "amino-acid-structure", "video_id": "BbZB-WBVFSk", "youtube_id": "BbZB-WBVFSk", "readable_id": "amino-acid-structure"}, "jCkhbKFZgLk": {"duration": 302, "path": "khan/math/precalculus/vectors-precalc/magnitude-direction/unit-vector-intro/", "keywords": "", "id": "jCkhbKFZgLk", "title": "Unit vectors", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jCkhbKFZgLk.mp4/jCkhbKFZgLk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jCkhbKFZgLk.mp4/jCkhbKFZgLk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jCkhbKFZgLk.m3u8/jCkhbKFZgLk.m3u8"}, "slug": "unit-vector-intro", "video_id": "jCkhbKFZgLk", "youtube_id": "jCkhbKFZgLk", "readable_id": "unit-vector-intro"}, "HvqJ-s26ol4": {"duration": 372, "path": "khan/partner-content/wi-phi/value-theory-1/the-problem-of-moral-luck/", "keywords": "", "id": "HvqJ-s26ol4", "title": "Ethics: The Problem of Moral Luck", "description": "Victor Kumar (Michigan) introduces the problem of moral luck and surveys potential solutions. We see how the problem arises out of a clash between intuitive reactions to cases and an abstract principle of moral responsibility.\u00a0\n\nSpeaker: Dr. Victor Kumar, Postdoctoral Research Fellow, University of Michigan, Ann Arbor", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HvqJ-s26ol4.mp4/HvqJ-s26ol4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HvqJ-s26ol4.mp4/HvqJ-s26ol4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HvqJ-s26ol4.m3u8/HvqJ-s26ol4.m3u8"}, "slug": "the-problem-of-moral-luck", "video_id": "HvqJ-s26ol4", "youtube_id": "HvqJ-s26ol4", "readable_id": "the-problem-of-moral-luck"}, "B4HXrb8cPQI": {"duration": 258, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/sandal-nike/", "keywords": "relief, parapet, Temple, Athena, Nike, Greece, Classical, High Classical, marble, Acropolis, Athens", "id": "B4HXrb8cPQI", "title": "Victory (Nike) Adjusting Her Sandal, Temple of Athena Nike (Acropolis)", "description": "Nike Adjusting Her Sandal, from the south side of the parapet of the Temple of Athena Nike, Acropolis, Athens, Greece, c. 410 B.C.E., marble, 3' 6\" high (Acropolis Museum, Athens)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/B4HXrb8cPQI.mp4/B4HXrb8cPQI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/B4HXrb8cPQI.mp4/B4HXrb8cPQI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/B4HXrb8cPQI.m3u8/B4HXrb8cPQI.m3u8"}, "slug": "sandal-nike", "video_id": "B4HXrb8cPQI", "youtube_id": "B4HXrb8cPQI", "readable_id": "sandal-nike"}, "PL9UYj2awDc": {"duration": 290, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/complicated_equations/solving-equations-with-the-distributive-property-2/", "keywords": "U02_L1_T2_we2:, Solving, equations, with, the, distributive, property, CC_39336_A-REI_1, CC_39336_A-REI_3", "id": "PL9UYj2awDc", "title": "A clever application of the distributive property to solve a multi-step equation", "description": "Sal solves the equation (3/4)x + 2 = (3/8)x - 4 using the distributive property", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PL9UYj2awDc.mp4/PL9UYj2awDc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PL9UYj2awDc.mp4/PL9UYj2awDc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PL9UYj2awDc.m3u8/PL9UYj2awDc.m3u8"}, "slug": "solving-equations-with-the-distributive-property-2", "video_id": "PL9UYj2awDc", "youtube_id": "PL9UYj2awDc", "readable_id": "solving-equations-with-the-distributive-property-2"}, "W_Q17tqw_7A": {"duration": 299, "path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/oxidative-phosphorylation-and-chemiosmosis/", "keywords": "oxidative, phosphorylation, chemiosmosis", "id": "W_Q17tqw_7A", "title": "Oxidative phosphorylation and chemiosmosis", "description": "Oxidative Phosphorylation and Chemiosmosis (along with slight correction of previous video)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W_Q17tqw_7A.mp4/W_Q17tqw_7A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W_Q17tqw_7A.mp4/W_Q17tqw_7A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W_Q17tqw_7A.m3u8/W_Q17tqw_7A.m3u8"}, "slug": "oxidative-phosphorylation-and-chemiosmosis", "video_id": "W_Q17tqw_7A", "youtube_id": "W_Q17tqw_7A", "readable_id": "oxidative-phosphorylation-and-chemiosmosis"}, "Wkjz1LlX1CQ": {"duration": 280, "path": "khan/math/differential-calculus/derivative_applications/differentiation-application/derivative-and-marginal-cost/", "keywords": "", "id": "Wkjz1LlX1CQ", "title": "Derivative and marginal cost", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Wkjz1LlX1CQ.mp4/Wkjz1LlX1CQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Wkjz1LlX1CQ.mp4/Wkjz1LlX1CQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Wkjz1LlX1CQ.m3u8/Wkjz1LlX1CQ.m3u8"}, "slug": "derivative-and-marginal-cost", "video_id": "Wkjz1LlX1CQ", "youtube_id": "Wkjz1LlX1CQ", "readable_id": "derivative-and-marginal-cost"}, "v9NLtiVt3XY": {"duration": 139, "path": "khan/math/precalculus/prob_comb/combinatorics_precalc/permutations-and-combinations-2/", "keywords": "U12_L2_T3_we2, Permutations, and, Combinations", "id": "v9NLtiVt3XY", "title": "Example: Ways to pick officers", "description": "How many ways can we pick officers for our organization?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v9NLtiVt3XY.mp4/v9NLtiVt3XY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v9NLtiVt3XY.mp4/v9NLtiVt3XY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v9NLtiVt3XY.m3u8/v9NLtiVt3XY.m3u8"}, "slug": "permutations-and-combinations-2", "video_id": "v9NLtiVt3XY", "youtube_id": "v9NLtiVt3XY", "readable_id": "permutations-and-combinations-2"}, "dIGLhLMsy2U": {"duration": 399, "path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/geometric-sequences/", "keywords": "", "id": "dIGLhLMsy2U", "title": "Geometric sequences", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dIGLhLMsy2U.mp4/dIGLhLMsy2U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dIGLhLMsy2U.mp4/dIGLhLMsy2U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dIGLhLMsy2U.m3u8/dIGLhLMsy2U.m3u8"}, "slug": "geometric-sequences", "video_id": "dIGLhLMsy2U", "youtube_id": "dIGLhLMsy2U", "readable_id": "geometric-sequences"}, "qasm7Mj7CYg": {"duration": 539, "path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/endocytosis-and-exocytosis/", "keywords": "", "id": "qasm7Mj7CYg", "title": "Endocytosis and Exocytosis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qasm7Mj7CYg.mp4/qasm7Mj7CYg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qasm7Mj7CYg.mp4/qasm7Mj7CYg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qasm7Mj7CYg.m3u8/qasm7Mj7CYg.m3u8"}, "slug": "endocytosis-and-exocytosis", "video_id": "qasm7Mj7CYg", "youtube_id": "qasm7Mj7CYg", "readable_id": "endocytosis-and-exocytosis"}, "4GcNzvILqtM": {"duration": 199, "path": "khan/math/algebra-basics/quadratics-polynomials-topic/multiplying-binomials-core-algebra/special-products-of-polynomials-1/", "keywords": "U08_L2_T4_we1, Special, Products, of, Polynomials, CC_39336_A-APR_1", "id": "4GcNzvILqtM", "title": "Squaring a binomial", "description": "Squaring a binomial", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4GcNzvILqtM.mp4/4GcNzvILqtM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4GcNzvILqtM.mp4/4GcNzvILqtM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4GcNzvILqtM.m3u8/4GcNzvILqtM.m3u8"}, "slug": "special-products-of-polynomials-1", "video_id": "4GcNzvILqtM", "youtube_id": "4GcNzvILqtM", "readable_id": "special-products-of-polynomials-1"}, "e_phjB19ZEg": {"duration": 827, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/a-tour-through-ancient-rome-in-320-c-e/", "keywords": "art history, smarthistory, khan academy, Rome, Rome Reborn, Hadrian, Nero, Domus Aurea, Roman Baths, Colosseum, Arch of Constantine, Roman Forum, Pantheon, Aqueducts, Constantine", "id": "e_phjB19ZEg", "title": "Ancient Rome", "description": "A project between Khan Academy and Rome Reborn - with Dr. Bernard Frischer", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e_phjB19ZEg.mp4/e_phjB19ZEg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e_phjB19ZEg.mp4/e_phjB19ZEg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e_phjB19ZEg.m3u8/e_phjB19ZEg.m3u8"}, "slug": "a-tour-through-ancient-rome-in-320-c-e", "video_id": "e_phjB19ZEg", "youtube_id": "e_phjB19ZEg", "readable_id": "a-tour-through-ancient-rome-in-320-c-e"}, "ERRR8cY7iQ4": {"duration": 151, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/subordination-coordination-harder/", "keywords": "education,online learning,learning,lessons", "id": "ERRR8cY7iQ4", "title": "Writing: Subordination and coordination \u2014 Harder example", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing subordination and coordination.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ERRR8cY7iQ4.mp4/ERRR8cY7iQ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ERRR8cY7iQ4.mp4/ERRR8cY7iQ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ERRR8cY7iQ4.m3u8/ERRR8cY7iQ4.m3u8"}, "slug": "subordination-coordination-harder", "video_id": "ERRR8cY7iQ4", "youtube_id": "ERRR8cY7iQ4", "readable_id": "subordination-coordination-harder"}, "E2bu4bG9yw8": {"duration": 113, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-5/", "keywords": "", "id": "E2bu4bG9yw8", "title": "5 Missing information", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E2bu4bG9yw8.mp4/E2bu4bG9yw8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E2bu4bG9yw8.mp4/E2bu4bG9yw8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E2bu4bG9yw8.m3u8/E2bu4bG9yw8.m3u8"}, "slug": "sat-2009-may-3-5", "video_id": "E2bu4bG9yw8", "youtube_id": "E2bu4bG9yw8", "readable_id": "sat-2009-may-3-5"}, "rPLjSY00JlE": {"duration": 444, "path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/glucose-insulin-and-diabetes/", "keywords": "diabetes, insulin, glucose, marquee", "id": "rPLjSY00JlE", "title": "Glucose insulin and diabetes", "description": "The basics of Type I and Type II diabetes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rPLjSY00JlE.mp4/rPLjSY00JlE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rPLjSY00JlE.mp4/rPLjSY00JlE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rPLjSY00JlE.m3u8/rPLjSY00JlE.m3u8"}, "slug": "glucose-insulin-and-diabetes", "video_id": "rPLjSY00JlE", "youtube_id": "rPLjSY00JlE", "readable_id": "glucose-insulin-and-diabetes"}, "ulyyusmpc9w": {"duration": 143, "path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/recognizing-concavity-exercise/", "keywords": "", "id": "ulyyusmpc9w", "title": "Recognizing concavity exercise", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ulyyusmpc9w.mp4/ulyyusmpc9w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ulyyusmpc9w.mp4/ulyyusmpc9w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ulyyusmpc9w.m3u8/ulyyusmpc9w.m3u8"}, "slug": "recognizing-concavity-exercise", "video_id": "ulyyusmpc9w", "youtube_id": "ulyyusmpc9w", "readable_id": "recognizing-concavity-exercise"}, "m0T2miip8jo": {"duration": 401, "path": "khan/test-prep/mcat/behavior/behavior-and-genetics/heritability/", "keywords": "", "id": "m0T2miip8jo", "title": "Heritability", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m0T2miip8jo.mp4/m0T2miip8jo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m0T2miip8jo.mp4/m0T2miip8jo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m0T2miip8jo.m3u8/m0T2miip8jo.m3u8"}, "slug": "heritability", "video_id": "m0T2miip8jo", "youtube_id": "m0T2miip8jo", "readable_id": "heritability"}, "tSHitjFIjd8": {"duration": 570, "path": "khan/math/geometry/right_triangles_topic/special_right_triangles/45-45-90-triangles/", "keywords": "Geometry, Math, Khan", "id": "tSHitjFIjd8", "title": "45-45-90 triangles", "description": "Introduction to 45-45-90 Triangles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tSHitjFIjd8.mp4/tSHitjFIjd8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tSHitjFIjd8.mp4/tSHitjFIjd8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tSHitjFIjd8.m3u8/tSHitjFIjd8.m3u8"}, "slug": "45-45-90-triangles", "video_id": "tSHitjFIjd8", "youtube_id": "tSHitjFIjd8", "readable_id": "45-45-90-triangles"}, "CPB7C36zyjM": {"duration": 462, "path": "khan/test-prep/mcat/chemical-processes/bioenergetics/why-we-need-metabolism/", "keywords": "", "id": "CPB7C36zyjM", "title": "Why we need metabolism?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CPB7C36zyjM.mp4/CPB7C36zyjM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CPB7C36zyjM.mp4/CPB7C36zyjM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CPB7C36zyjM.m3u8/CPB7C36zyjM.m3u8"}, "slug": "why-we-need-metabolism", "video_id": "CPB7C36zyjM", "youtube_id": "CPB7C36zyjM", "readable_id": "why-we-need-metabolism"}, "jRCdXNfngLc": {"duration": 371, "path": "khan/test-prep/mcat/biomolecules/gene-control/jacob-monod-the-lac-operon/", "keywords": "", "id": "jRCdXNfngLc", "title": "Jacob-Monod: The Lac operon", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jRCdXNfngLc.mp4/jRCdXNfngLc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jRCdXNfngLc.mp4/jRCdXNfngLc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jRCdXNfngLc.m3u8/jRCdXNfngLc.m3u8"}, "slug": "jacob-monod-the-lac-operon", "video_id": "jRCdXNfngLc", "youtube_id": "jRCdXNfngLc", "readable_id": "jacob-monod-the-lac-operon"}, "VBcEz8bVbL0": {"duration": 326, "path": "khan/test-prep/mcat/behavior/psychological-disorders/sleep-disorders/", "keywords": "", "id": "VBcEz8bVbL0", "title": "Sleep disorders", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VBcEz8bVbL0.mp4/VBcEz8bVbL0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VBcEz8bVbL0.mp4/VBcEz8bVbL0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VBcEz8bVbL0.m3u8/VBcEz8bVbL0.m3u8"}, "slug": "sleep-disorders", "video_id": "VBcEz8bVbL0", "youtube_id": "VBcEz8bVbL0", "readable_id": "sleep-disorders"}, "CKR854hjydM": {"duration": 799, "path": "khan/partner-content/big-history-project/big-bang/the-big-bang/bhp-what-emerged-from-the-big-bang/", "keywords": "", "id": "CKR854hjydM", "title": "What Emerged from the Big Bang?", "description": "David Christian explains how the Big Bang theory developed by looking at the evidence that supports it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CKR854hjydM.mp4/CKR854hjydM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CKR854hjydM.mp4/CKR854hjydM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CKR854hjydM.m3u8/CKR854hjydM.m3u8"}, "slug": "bhp-what-emerged-from-the-big-bang", "video_id": "CKR854hjydM", "youtube_id": "CKR854hjydM", "readable_id": "bhp-what-emerged-from-the-big-bang"}, "T_b9U5gn_Zk": {"duration": 709, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/heart-attack-myocardial-infarction-pathophysiology/", "keywords": "", "id": "T_b9U5gn_Zk", "title": "Heart attack (myocardial infarction) pathophysiology", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T_b9U5gn_Zk.mp4/T_b9U5gn_Zk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T_b9U5gn_Zk.mp4/T_b9U5gn_Zk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T_b9U5gn_Zk.m3u8/T_b9U5gn_Zk.m3u8"}, "slug": "heart-attack-myocardial-infarction-pathophysiology", "video_id": "T_b9U5gn_Zk", "youtube_id": "T_b9U5gn_Zk", "readable_id": "heart-attack-myocardial-infarction-pathophysiology"}, "vkhYFml0w6c": {"duration": 456, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/why-of-algebra/why-we-do-the-same-thing-to-both-sides-multi-step-equations/", "keywords": "Why, we, do, the, same, thing, to, both, sides, multi, step, equations", "id": "vkhYFml0w6c", "title": "Why we do the same thing to both sides: Multi-step equations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vkhYFml0w6c.mp4/vkhYFml0w6c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vkhYFml0w6c.mp4/vkhYFml0w6c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vkhYFml0w6c.m3u8/vkhYFml0w6c.m3u8"}, "slug": "why-we-do-the-same-thing-to-both-sides-multi-step-equations", "video_id": "vkhYFml0w6c", "youtube_id": "vkhYFml0w6c", "readable_id": "why-we-do-the-same-thing-to-both-sides-multi-step-equations"}, "YOYQys52sPs": {"duration": 623, "path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/triangle-area-proofs/", "keywords": "Triangle, Area", "id": "YOYQys52sPs", "title": "Triangle area proofs", "description": "Proving that the area of any triangle is 1/2 b x h", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YOYQys52sPs.mp4/YOYQys52sPs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YOYQys52sPs.mp4/YOYQys52sPs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YOYQys52sPs.m3u8/YOYQys52sPs.m3u8"}, "slug": "triangle-area-proofs", "video_id": "YOYQys52sPs", "youtube_id": "YOYQys52sPs", "readable_id": "triangle-area-proofs"}, "_NWc3C3cTNA": {"duration": 587, "path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/different-way-to-determine-time-in-air/", "keywords": "physics, projectile, motion, kinematics", "id": "_NWc3C3cTNA", "title": "Different way to determine time in air", "description": "Another way to determine time in the air given an initial vertical velocity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_NWc3C3cTNA.mp4/_NWc3C3cTNA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_NWc3C3cTNA.mp4/_NWc3C3cTNA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_NWc3C3cTNA.m3u8/_NWc3C3cTNA.m3u8"}, "slug": "different-way-to-determine-time-in-air", "video_id": "_NWc3C3cTNA", "youtube_id": "_NWc3C3cTNA", "readable_id": "different-way-to-determine-time-in-air"}, "PF6_y4zYVec": {"duration": 243, "path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/figuring-out-which-function-is-the-the-derivative/", "keywords": "", "id": "PF6_y4zYVec", "title": "Figuring out which function is the derivative", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PF6_y4zYVec.mp4/PF6_y4zYVec.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PF6_y4zYVec.mp4/PF6_y4zYVec.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PF6_y4zYVec.m3u8/PF6_y4zYVec.m3u8"}, "slug": "figuring-out-which-function-is-the-the-derivative", "video_id": "PF6_y4zYVec", "youtube_id": "PF6_y4zYVec", "readable_id": "figuring-out-which-function-is-the-the-derivative"}, "6hri9k_2R8o": {"duration": 397, "path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/mean-value-theorem-1/", "keywords": "", "id": "6hri9k_2R8o", "title": "Mean value theorem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6hri9k_2R8o.mp4/6hri9k_2R8o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6hri9k_2R8o.mp4/6hri9k_2R8o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6hri9k_2R8o.m3u8/6hri9k_2R8o.m3u8"}, "slug": "mean-value-theorem-1", "video_id": "6hri9k_2R8o", "youtube_id": "6hri9k_2R8o", "readable_id": "mean-value-theorem-1"}, "S7C-Q-RkX0I": {"duration": 627, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/electrolysis-of-molten-sodium-chloride-edited/", "keywords": "", "id": "S7C-Q-RkX0I", "title": "Electrolysis of molten sodium chloride edited", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S7C-Q-RkX0I.mp4/S7C-Q-RkX0I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S7C-Q-RkX0I.mp4/S7C-Q-RkX0I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S7C-Q-RkX0I.m3u8/S7C-Q-RkX0I.m3u8"}, "slug": "electrolysis-of-molten-sodium-chloride-edited", "video_id": "S7C-Q-RkX0I", "youtube_id": "S7C-Q-RkX0I", "readable_id": "electrolysis-of-molten-sodium-chloride-edited"}, "emdHj6WodLw": {"duration": 553, "path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/projectile-motion-part-2/", "keywords": "velocity, acceleration, gravity, physics, math, khan", "id": "emdHj6WodLw", "title": "Projectile motion (part 2)", "description": "A derivation of a new motion equation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/emdHj6WodLw.mp4/emdHj6WodLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/emdHj6WodLw.mp4/emdHj6WodLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/emdHj6WodLw.m3u8/emdHj6WodLw.m3u8"}, "slug": "projectile-motion-part-2", "video_id": "emdHj6WodLw", "youtube_id": "emdHj6WodLw", "readable_id": "projectile-motion-part-2"}, "efQjBTPhS_0": {"duration": 415, "path": "khan/science/discoveries-projects/robots/bit-zee/hacking-and-attaching-a-digital-recorder-player/", "keywords": "Hack, digital voice recorder, make, adurino, diy,", "id": "efQjBTPhS_0", "title": "Digital recorder/player connections", "description": "In this video we attach and wire a digital voice recorder to Bit-zee.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/efQjBTPhS_0.mp4/efQjBTPhS_0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/efQjBTPhS_0.mp4/efQjBTPhS_0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/efQjBTPhS_0.m3u8/efQjBTPhS_0.m3u8"}, "slug": "hacking-and-attaching-a-digital-recorder-player", "video_id": "efQjBTPhS_0", "youtube_id": "efQjBTPhS_0", "readable_id": "hacking-and-attaching-a-digital-recorder-player"}, "_fAgls5bGXs": {"duration": 293, "path": "khan/humanities/medieval-world/byzantine1/venice-ravenna/saint-marks/", "keywords": "Byzantine, architecture, Venice", "id": "_fAgls5bGXs", "title": "Saint Mark's Basilica, Venice", "description": "Saint Mark's Basilica, Venice, begun 1063 and Anastasis (The Harrowing of Hell) mosaic, c. 1180-1200, Middle Byzantine. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_fAgls5bGXs.mp4/_fAgls5bGXs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_fAgls5bGXs.mp4/_fAgls5bGXs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_fAgls5bGXs.m3u8/_fAgls5bGXs.m3u8"}, "slug": "saint-marks", "video_id": "_fAgls5bGXs", "youtube_id": "_fAgls5bGXs", "readable_id": "saint-marks"}, "XGWL9jfPHJ8": {"duration": 585, "path": "khan/science/biology/cellular-molecular-biology/meiosis/phases-of-meiosis-i/", "keywords": "", "id": "XGWL9jfPHJ8", "title": "Phases of Meiosis I", "description": "Phases of Meiosis I", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XGWL9jfPHJ8.mp4/XGWL9jfPHJ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XGWL9jfPHJ8.mp4/XGWL9jfPHJ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XGWL9jfPHJ8.m3u8/XGWL9jfPHJ8.m3u8"}, "slug": "phases-of-meiosis-i", "video_id": "XGWL9jfPHJ8", "youtube_id": "XGWL9jfPHJ8", "readable_id": "phases-of-meiosis-i"}, "CFBKfgGTP98": {"duration": 176, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/correction-2-propylheptane-should-never-be-the-name/", "keywords": "Correction, 2-Propylheptane, should, never, be, the, name!", "id": "CFBKfgGTP98", "title": "Correction - 2-propylheptane should never be the name!", "description": "Correction - 2-Propylheptane should never be the name!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CFBKfgGTP98.mp4/CFBKfgGTP98.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CFBKfgGTP98.mp4/CFBKfgGTP98.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CFBKfgGTP98.m3u8/CFBKfgGTP98.m3u8"}, "slug": "correction-2-propylheptane-should-never-be-the-name", "video_id": "CFBKfgGTP98", "youtube_id": "CFBKfgGTP98", "readable_id": "correction-2-propylheptane-should-never-be-the-name"}, "bBQVaRnHqLs": {"duration": 709, "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-tutorial/fixed-variable-and-marginal-cost/", "keywords": "microeconomics", "id": "bBQVaRnHqLs", "title": "Fixed, variable, and marginal cost", "description": "Thinking about average fixed, variable and marginal cost", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bBQVaRnHqLs.mp4/bBQVaRnHqLs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bBQVaRnHqLs.mp4/bBQVaRnHqLs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bBQVaRnHqLs.m3u8/bBQVaRnHqLs.m3u8"}, "slug": "fixed-variable-and-marginal-cost", "video_id": "bBQVaRnHqLs", "youtube_id": "bBQVaRnHqLs", "readable_id": "fixed-variable-and-marginal-cost"}, "4Bx06GFyhUA": {"duration": 239, "path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/comparing-features-of-functions-2-example-2/", "keywords": "", "id": "4Bx06GFyhUA", "title": "Comparing features of functions (example 2)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4Bx06GFyhUA.mp4/4Bx06GFyhUA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4Bx06GFyhUA.mp4/4Bx06GFyhUA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4Bx06GFyhUA.m3u8/4Bx06GFyhUA.m3u8"}, "slug": "comparing-features-of-functions-2-example-2", "video_id": "4Bx06GFyhUA", "youtube_id": "4Bx06GFyhUA", "readable_id": "comparing-features-of-functions-2-example-2"}, "9R9vPcPyUwo": {"duration": 230, "path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-a-dvd-player-1-of-5/", "keywords": "Housing, DVD, stamped steel, injection molding, control board, power supply, digital video disk ", "id": "9R9vPcPyUwo", "title": "What is inside a DVD player? (1 of 5)", "description": "In this video we explore the housing and functions of a DVD player.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9R9vPcPyUwo.mp4/9R9vPcPyUwo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9R9vPcPyUwo.mp4/9R9vPcPyUwo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9R9vPcPyUwo.m3u8/9R9vPcPyUwo.m3u8"}, "slug": "what-is-inside-a-dvd-player-1-of-5", "video_id": "9R9vPcPyUwo", "youtube_id": "9R9vPcPyUwo", "readable_id": "what-is-inside-a-dvd-player-1-of-5"}, "ePh8iCbcXfA": {"duration": 317, "path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/formal-and-alternate-form-of-the-derivative-example-1/", "keywords": "", "id": "ePh8iCbcXfA", "title": "Formal and alternate form of the derivative example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ePh8iCbcXfA.mp4/ePh8iCbcXfA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ePh8iCbcXfA.mp4/ePh8iCbcXfA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ePh8iCbcXfA.m3u8/ePh8iCbcXfA.m3u8"}, "slug": "formal-and-alternate-form-of-the-derivative-example-1", "video_id": "ePh8iCbcXfA", "youtube_id": "ePh8iCbcXfA", "readable_id": "formal-and-alternate-form-of-the-derivative-example-1"}, "wyTjyQMVvc4": {"duration": 773, "path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals/line-integral-example-2-part-1/", "keywords": "line, integral, closed, path, calculus", "id": "wyTjyQMVvc4", "title": "Line integral example 2 (part 1)", "description": "Line integral over a closed path (part 1)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wyTjyQMVvc4.mp4/wyTjyQMVvc4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wyTjyQMVvc4.mp4/wyTjyQMVvc4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wyTjyQMVvc4.m3u8/wyTjyQMVvc4.m3u8"}, "slug": "line-integral-example-2-part-1", "video_id": "wyTjyQMVvc4", "youtube_id": "wyTjyQMVvc4", "readable_id": "line-integral-example-2-part-1"}, "2GQTfpDE9DQ": {"duration": 711, "path": "khan/test-prep/mcat/physical-processes/electrostatics-1/coulombs-law/", "keywords": "", "id": "2GQTfpDE9DQ", "title": "Coulomb's Law", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2GQTfpDE9DQ.mp4/2GQTfpDE9DQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2GQTfpDE9DQ.mp4/2GQTfpDE9DQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2GQTfpDE9DQ.m3u8/2GQTfpDE9DQ.m3u8"}, "slug": "coulombs-law", "video_id": "2GQTfpDE9DQ", "youtube_id": "2GQTfpDE9DQ", "readable_id": "coulombs-law"}, "qJCoXVdPowo": {"duration": 601, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/what-is-eisenmenger-syndrome/", "keywords": "", "id": "qJCoXVdPowo", "title": "What is Eisenmenger syndrome?", "description": "Eisenmenger's syndrome is when blood in the heart shunts from right-to-left due to increased pressure in the right ventricle. This increased pressure is usually caused by extra blood flowing through the blood vessels of the lungs, originally caused by left-to-right shunting of blood from a hole in the heart wall.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qJCoXVdPowo.mp4/qJCoXVdPowo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qJCoXVdPowo.mp4/qJCoXVdPowo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qJCoXVdPowo.m3u8/qJCoXVdPowo.m3u8"}, "slug": "what-is-eisenmenger-syndrome", "video_id": "qJCoXVdPowo", "youtube_id": "qJCoXVdPowo", "readable_id": "what-is-eisenmenger-syndrome"}, "S2P4I_hFnFI": {"duration": 278, "path": "khan/humanities/medieval-world/early-christian1/basilica-of-santa-maria-maggiore-rome-5th-century-a-d/", "keywords": "Smarthistory, Art History, Basilica, Santa Maria Maggiore, Context Travel, Khan Academy", "id": "S2P4I_hFnFI", "title": "Santa Maria Maggiore", "description": "Basilica of Santa Maria Maggiore, Rome, 5th century A.D. \n\nA Smarthistory video with partner Context Travel. Speakers: Dr. Steven Zucker and Richard Bowen.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S2P4I_hFnFI.mp4/S2P4I_hFnFI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S2P4I_hFnFI.mp4/S2P4I_hFnFI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S2P4I_hFnFI.m3u8/S2P4I_hFnFI.m3u8"}, "slug": "basilica-of-santa-maria-maggiore-rome-5th-century-a-d", "video_id": "S2P4I_hFnFI", "youtube_id": "S2P4I_hFnFI", "readable_id": "basilica-of-santa-maria-maggiore-rome-5th-century-a-d"}, "oapNz_NNGh4": {"duration": 213, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-10-oil-imports/", "keywords": "", "id": "oapNz_NNGh4", "title": "10 Oil imports", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oapNz_NNGh4.mp4/oapNz_NNGh4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oapNz_NNGh4.mp4/oapNz_NNGh4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oapNz_NNGh4.m3u8/oapNz_NNGh4.m3u8"}, "slug": "sat-10-oil-imports", "video_id": "oapNz_NNGh4", "youtube_id": "oapNz_NNGh4", "readable_id": "sat-10-oil-imports"}, "qWfwRbSrQMU": {"duration": 230, "path": "khan/test-prep/mcat/processing-the-environment/memory/alzheimer-s-disease-and-korsakoff-s-syndrome/", "keywords": "", "id": "qWfwRbSrQMU", "title": "Alzheimer's disease and Korsakoff's syndrome", "description": "Learn about how Alzheimer's Disease and Korsakoff's Syndrome affect memory.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qWfwRbSrQMU.mp4/qWfwRbSrQMU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qWfwRbSrQMU.mp4/qWfwRbSrQMU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qWfwRbSrQMU.m3u8/qWfwRbSrQMU.m3u8"}, "slug": "alzheimer-s-disease-and-korsakoff-s-syndrome", "video_id": "qWfwRbSrQMU", "youtube_id": "qWfwRbSrQMU", "readable_id": "alzheimer-s-disease-and-korsakoff-s-syndrome"}, "9ODhKqFaugQ": {"duration": 432, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/van-eyck-portrait-of-giovanni-arnolfini-and-his-wife-1434/", "keywords": "arnolfini, van eyck, art history, smarthistory, Art history History of art", "id": "9ODhKqFaugQ", "title": "Van Eyck, The Arnolfini Portrait", "description": "Jan Van Eyck, The Arnolfini Portrait, tempera and oil on wood, 1434 (National Gallery, London). Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9ODhKqFaugQ.mp4/9ODhKqFaugQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9ODhKqFaugQ.mp4/9ODhKqFaugQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9ODhKqFaugQ.m3u8/9ODhKqFaugQ.m3u8"}, "slug": "van-eyck-portrait-of-giovanni-arnolfini-and-his-wife-1434", "video_id": "9ODhKqFaugQ", "youtube_id": "9ODhKqFaugQ", "readable_id": "van-eyck-portrait-of-giovanni-arnolfini-and-his-wife-1434"}, "EYyYjwp10cM": {"duration": 44, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-4-12/", "keywords": "", "id": "EYyYjwp10cM", "title": "12 Composite functions", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EYyYjwp10cM.mp4/EYyYjwp10cM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EYyYjwp10cM.mp4/EYyYjwp10cM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EYyYjwp10cM.m3u8/EYyYjwp10cM.m3u8"}, "slug": "sat-2010-may-4-12", "video_id": "EYyYjwp10cM", "youtube_id": "EYyYjwp10cM", "readable_id": "sat-2010-may-4-12"}, "HnfBFeLunk4": {"duration": 319, "path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-11/", "keywords": "physics, bernoulli's, equation, pressure", "id": "HnfBFeLunk4", "title": "Bernoulli's equation (part 4)", "description": "Clarification of, and more thoughts on, the Bernoulli's equation example problem where liquid exits a hole in a container.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HnfBFeLunk4.mp4/HnfBFeLunk4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HnfBFeLunk4.mp4/HnfBFeLunk4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HnfBFeLunk4.m3u8/HnfBFeLunk4.m3u8"}, "slug": "fluids-part-11", "video_id": "HnfBFeLunk4", "youtube_id": "HnfBFeLunk4", "readable_id": "fluids-part-11"}, "I2dbzp0zHuw": {"duration": 505, "path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/closed-curve-line-integrals-of-conservative-vector-fields/", "keywords": "line, integral, conservative, vector, field", "id": "I2dbzp0zHuw", "title": "Closed curve line integrals of conservative vector fields", "description": "Showing that the line integral along closed curves of conservative vector fields is zero", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I2dbzp0zHuw.mp4/I2dbzp0zHuw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I2dbzp0zHuw.mp4/I2dbzp0zHuw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I2dbzp0zHuw.m3u8/I2dbzp0zHuw.m3u8"}, "slug": "closed-curve-line-integrals-of-conservative-vector-fields", "video_id": "I2dbzp0zHuw", "youtube_id": "I2dbzp0zHuw", "readable_id": "closed-curve-line-integrals-of-conservative-vector-fields"}, "A44_Sqifi0U": {"duration": 386, "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/whats-in-sweat-holocrine-apocrine-and-merocrine-glands/", "keywords": "", "id": "A44_Sqifi0U", "title": "What's in sweat? (Holocrine, Apocrine, Merocrine Glands)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A44_Sqifi0U.mp4/A44_Sqifi0U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A44_Sqifi0U.mp4/A44_Sqifi0U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A44_Sqifi0U.m3u8/A44_Sqifi0U.m3u8"}, "slug": "whats-in-sweat-holocrine-apocrine-and-merocrine-glands", "video_id": "A44_Sqifi0U", "youtube_id": "A44_Sqifi0U", "readable_id": "whats-in-sweat-holocrine-apocrine-and-merocrine-glands"}, "3fEIvVnGUcI": {"duration": 181, "path": "khan/college-admissions/explore-college-options/introduction-eco/sal-khans-story-exploring-college-options/", "keywords": "", "id": "3fEIvVnGUcI", "title": "Sal Khan's story: Exploring college options", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3fEIvVnGUcI.mp4/3fEIvVnGUcI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3fEIvVnGUcI.mp4/3fEIvVnGUcI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3fEIvVnGUcI.m3u8/3fEIvVnGUcI.m3u8"}, "slug": "sal-khans-story-exploring-college-options", "video_id": "3fEIvVnGUcI", "youtube_id": "3fEIvVnGUcI", "readable_id": "sal-khans-story-exploring-college-options"}, "ch61milcTUU": {"duration": 738, "path": "khan/test-prep/mcat/physical-processes/gas-phase/partial-pressure-2/", "keywords": "", "id": "ch61milcTUU", "title": "Partial pressure", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ch61milcTUU.mp4/ch61milcTUU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ch61milcTUU.mp4/ch61milcTUU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ch61milcTUU.m3u8/ch61milcTUU.m3u8"}, "slug": "partial-pressure-2", "video_id": "ch61milcTUU", "youtube_id": "ch61milcTUU", "readable_id": "partial-pressure-2"}, "iI_2Piwn_og": {"duration": 793, "path": "khan/math/algebra/linear_inequalities/compound_absolute_value_inequali/absolute-value-inequalities/", "keywords": "Absolute, Value, Inequalities", "id": "iI_2Piwn_og", "title": "Absolute value inequalities", "description": "Absolute Value Inequalities", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iI_2Piwn_og.mp4/iI_2Piwn_og.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iI_2Piwn_og.mp4/iI_2Piwn_og.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iI_2Piwn_og.m3u8/iI_2Piwn_og.m3u8"}, "slug": "absolute-value-inequalities", "video_id": "iI_2Piwn_og", "youtube_id": "iI_2Piwn_og", "readable_id": "absolute-value-inequalities"}, "6G1evL7ELwE": {"duration": 407, "path": "khan/science/biology/water-acids-and-bases/hydrogen-bonding-in-water/hydrogen-bonding-in-water/", "keywords": "education,online learning,learning,lessons,hydrogen bonding,water polarity,partial charge", "id": "6G1evL7ELwE", "title": "Hydrogen bonding in water", "description": "Hydrogen bonding in water", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6G1evL7ELwE.mp4/6G1evL7ELwE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6G1evL7ELwE.mp4/6G1evL7ELwE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6G1evL7ELwE.m3u8/6G1evL7ELwE.m3u8"}, "slug": "hydrogen-bonding-in-water", "video_id": "6G1evL7ELwE", "youtube_id": "6G1evL7ELwE", "readable_id": "hydrogen-bonding-in-water"}, "yC3vsJJIcE0": {"duration": 216, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lakeshia-grant/lakeshia-grant-1/", "keywords": "", "id": "yC3vsJJIcE0", "title": "Business and Family", "description": "LaKeshia Grant founded Virtual Enterprise Architects as a place where she would have a voice and create an environment where others could be heard. She discusses her industry and encourages would-be entrepreneurs to incorporate their core values in their business. Grant\u2019s mother may not know exactly what the information technology business does, but she instilled a strong work ethic and the spirit of entrepreneurship in her daughter.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yC3vsJJIcE0.mp4/yC3vsJJIcE0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yC3vsJJIcE0.mp4/yC3vsJJIcE0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yC3vsJJIcE0.m3u8/yC3vsJJIcE0.m3u8"}, "slug": "lakeshia-grant-1", "video_id": "yC3vsJJIcE0", "youtube_id": "yC3vsJJIcE0", "readable_id": "lakeshia-grant-1"}, "ynIq9IxbVso": {"duration": 198, "path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/interpreting-features-of-functions-2-example-2/", "keywords": "", "id": "ynIq9IxbVso", "title": "Interpreting features of functions (example 2)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ynIq9IxbVso.mp4/ynIq9IxbVso.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ynIq9IxbVso.mp4/ynIq9IxbVso.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ynIq9IxbVso.m3u8/ynIq9IxbVso.m3u8"}, "slug": "interpreting-features-of-functions-2-example-2", "video_id": "ynIq9IxbVso", "youtube_id": "ynIq9IxbVso", "readable_id": "interpreting-features-of-functions-2-example-2"}, "Zxm4Xxvzohk": {"duration": 306, "path": "khan/computing/computer-science/cryptography/random-algorithms-probability/bayes-theorem-visualized/", "keywords": "bayes theorem, conditional probability, probability", "id": "Zxm4Xxvzohk", "title": "Conditional probability warmup", "description": "Conditional probability visualized using trees.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zxm4Xxvzohk.mp4/Zxm4Xxvzohk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zxm4Xxvzohk.mp4/Zxm4Xxvzohk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zxm4Xxvzohk.m3u8/Zxm4Xxvzohk.m3u8"}, "slug": "bayes-theorem-visualized", "video_id": "Zxm4Xxvzohk", "youtube_id": "Zxm4Xxvzohk", "readable_id": "bayes-theorem-visualized"}, "LqyA96oYtwE": {"duration": 388, "path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/logarithmic-function-graphs/", "keywords": "", "id": "LqyA96oYtwE", "title": "Graphs of logarithmic functions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LqyA96oYtwE.mp4/LqyA96oYtwE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LqyA96oYtwE.mp4/LqyA96oYtwE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LqyA96oYtwE.m3u8/LqyA96oYtwE.m3u8"}, "slug": "logarithmic-function-graphs", "video_id": "LqyA96oYtwE", "youtube_id": "LqyA96oYtwE", "readable_id": "logarithmic-function-graphs"}, "bAUT_Pux73w": {"duration": 432, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/old-school-equations/age-word-problems-1/", "keywords": "algebra, word, problems, CC_7_RP_2_c", "id": "bAUT_Pux73w", "title": "Age word problems 1", "description": "Age word problems", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bAUT_Pux73w.mp4/bAUT_Pux73w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bAUT_Pux73w.mp4/bAUT_Pux73w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bAUT_Pux73w.m3u8/bAUT_Pux73w.m3u8"}, "slug": "age-word-problems-1", "video_id": "bAUT_Pux73w", "youtube_id": "bAUT_Pux73w", "readable_id": "age-word-problems-1"}, "xOlHaQSBwOk": {"duration": 87, "path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/environmentmodeling-7/", "keywords": "", "id": "xOlHaQSBwOk", "title": "2. Where is the touching point?", "description": "Where does the string touch the parabola? See if you can come up with your hypothesis!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xOlHaQSBwOk.mp4/xOlHaQSBwOk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xOlHaQSBwOk.mp4/xOlHaQSBwOk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xOlHaQSBwOk.m3u8/xOlHaQSBwOk.m3u8"}, "slug": "environmentmodeling-7", "video_id": "xOlHaQSBwOk", "youtube_id": "xOlHaQSBwOk", "readable_id": "environmentmodeling-7"}, "frd8j6fMuHo": {"duration": 141, "path": "khan/partner-content/pixar/animate/parametric-curves/a6-final/", "keywords": "", "id": "frd8j6fMuHo", "title": "2. Repeated linear interpolation", "description": "First we'll review de Castlejau's algorithm using three points. Then it's your turn to figure out how to do it with 4 points!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/frd8j6fMuHo.mp4/frd8j6fMuHo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/frd8j6fMuHo.mp4/frd8j6fMuHo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/frd8j6fMuHo.m3u8/frd8j6fMuHo.m3u8"}, "slug": "a6-final", "video_id": "frd8j6fMuHo", "youtube_id": "frd8j6fMuHo", "readable_id": "a6-final"}, "LRlVWC0FMQc": {"duration": 203, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/absolute-value-equations/absolute-value-equations-example-1/", "keywords": "u10_l3_t2_we1, Absolute, Value, Equations, CC_6_NS_7_c, CC_7_NS_1_c, CC_39336_F-IF_7_b", "id": "LRlVWC0FMQc", "title": "Absolute value equations example 1", "description": "Absolute Value Equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LRlVWC0FMQc.mp4/LRlVWC0FMQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LRlVWC0FMQc.mp4/LRlVWC0FMQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LRlVWC0FMQc.m3u8/LRlVWC0FMQc.m3u8"}, "slug": "absolute-value-equations-example-1", "video_id": "LRlVWC0FMQc", "youtube_id": "LRlVWC0FMQc", "readable_id": "absolute-value-equations-example-1"}, "DP4-S716q4E": {"duration": 426, "path": "khan/humanities/art-asia/himalayas/tibet/views-of-tibet/", "keywords": "Tibet", "id": "DP4-S716q4E", "title": "Views of Tibet", "description": "View important Buddhist sites and rituals in Tibet. Note: This video does not include narration.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DP4-S716q4E.mp4/DP4-S716q4E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DP4-S716q4E.mp4/DP4-S716q4E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DP4-S716q4E.m3u8/DP4-S716q4E.m3u8"}, "slug": "views-of-tibet", "video_id": "DP4-S716q4E", "youtube_id": "DP4-S716q4E", "readable_id": "views-of-tibet"}, "z8M4EciPpYI": {"duration": 409, "path": "khan/science/biology/properties-of-carbon/hydrocarbon-structures-and-functional-groups/isomers/", "keywords": "education,online learning,learning,lessons,isomers,structural isomers,geometric isomers,cis-trans,enantiomers", "id": "z8M4EciPpYI", "title": "Isomers", "description": "Structural isomers, stereoisomers, geometric isomers, cis-trans isomers, and enantiomers.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z8M4EciPpYI.mp4/z8M4EciPpYI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z8M4EciPpYI.mp4/z8M4EciPpYI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z8M4EciPpYI.m3u8/z8M4EciPpYI.m3u8"}, "slug": "isomers", "video_id": "z8M4EciPpYI", "youtube_id": "z8M4EciPpYI", "readable_id": "isomers"}, "S0uuK7SQcA8": {"duration": 567, "path": "khan/math/pre-algebra/decimals-pre-alg/dividing-decimals-pre-alg/dividing-decimal/", "keywords": "Division, decimals, CC_6_NS_3", "id": "S0uuK7SQcA8", "title": "Dividing decimals with hundredths example 3", "description": "The old saying is \"practice makes perfect.\" Let's keep practicing dividing decimals and making our divisor a whole number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S0uuK7SQcA8.mp4/S0uuK7SQcA8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S0uuK7SQcA8.mp4/S0uuK7SQcA8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S0uuK7SQcA8.m3u8/S0uuK7SQcA8.m3u8"}, "slug": "dividing-decimal", "video_id": "S0uuK7SQcA8", "youtube_id": "S0uuK7SQcA8", "readable_id": "dividing-decimal"}, "b_cAxh44aNQ": {"duration": 596, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/introduction-to-the-yield-curve/", "keywords": "economics, yield, curve, treasury, bills, notes, bonds, interest", "id": "b_cAxh44aNQ", "title": "Introduction to the yield curve", "description": "Introduction to the treasury yield curve.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b_cAxh44aNQ.mp4/b_cAxh44aNQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b_cAxh44aNQ.mp4/b_cAxh44aNQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b_cAxh44aNQ.m3u8/b_cAxh44aNQ.m3u8"}, "slug": "introduction-to-the-yield-curve", "video_id": "b_cAxh44aNQ", "youtube_id": "b_cAxh44aNQ", "readable_id": "introduction-to-the-yield-curve"}, "IICR-w1jYcA": {"duration": 602, "path": "khan/math/differential-equations/first-order-differential-equations/modeling-with-differential-equations/newtons-law-of-cooling/", "keywords": "", "id": "IICR-w1jYcA", "title": "Newton's Law of Cooling", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IICR-w1jYcA.mp4/IICR-w1jYcA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IICR-w1jYcA.mp4/IICR-w1jYcA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IICR-w1jYcA.m3u8/IICR-w1jYcA.m3u8"}, "slug": "newtons-law-of-cooling", "video_id": "IICR-w1jYcA", "youtube_id": "IICR-w1jYcA", "readable_id": "newtons-law-of-cooling"}, "EdQ7Q9VoF44": {"duration": 646, "path": "khan/math/differential-equations/laplace-transform/laplace-transform-to-solve-differential-equation/laplace-transform-solves-an-equation-2/", "keywords": "laplace, transform, differential, equation", "id": "EdQ7Q9VoF44", "title": "Laplace transform solves an equation 2", "description": "Second part of using the Laplace Transform to solve a differential equation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EdQ7Q9VoF44.mp4/EdQ7Q9VoF44.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EdQ7Q9VoF44.mp4/EdQ7Q9VoF44.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EdQ7Q9VoF44.m3u8/EdQ7Q9VoF44.m3u8"}, "slug": "laplace-transform-solves-an-equation-2", "video_id": "EdQ7Q9VoF44", "youtube_id": "EdQ7Q9VoF44", "readable_id": "laplace-transform-solves-an-equation-2"}, "wdINk29ZSMA": {"duration": 613, "path": "khan/test-prep/gmat/problem-solving/gmat-math-33/", "keywords": "GMAT, Math, problem, solving", "id": "wdINk29ZSMA", "title": "GMAT: Math 33", "description": "167-172, pgs. 174-175", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wdINk29ZSMA.mp4/wdINk29ZSMA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wdINk29ZSMA.mp4/wdINk29ZSMA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wdINk29ZSMA.m3u8/wdINk29ZSMA.m3u8"}, "slug": "gmat-math-33", "video_id": "wdINk29ZSMA", "youtube_id": "wdINk29ZSMA", "readable_id": "gmat-math-33"}, "5kpVQqV7EV8": {"duration": 219, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/cartilage/", "keywords": "", "id": "5kpVQqV7EV8", "title": "Cartilage", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5kpVQqV7EV8.mp4/5kpVQqV7EV8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5kpVQqV7EV8.mp4/5kpVQqV7EV8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5kpVQqV7EV8.m3u8/5kpVQqV7EV8.m3u8"}, "slug": "cartilage", "video_id": "5kpVQqV7EV8", "youtube_id": "5kpVQqV7EV8", "readable_id": "cartilage"}, "m3t3mfahh_4": {"duration": 986, "path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/introduction-to-energy-storage/", "keywords": "MCAT", "id": "m3t3mfahh_4", "title": "Introduction to energy storage", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m3t3mfahh_4.mp4/m3t3mfahh_4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m3t3mfahh_4.mp4/m3t3mfahh_4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m3t3mfahh_4.m3u8/m3t3mfahh_4.m3u8"}, "slug": "introduction-to-energy-storage", "video_id": "m3t3mfahh_4", "youtube_id": "m3t3mfahh_4", "readable_id": "introduction-to-energy-storage"}, "gv9ogppphso": {"duration": 247, "path": "khan/math/differential-calculus/limits_topic/limits-infinity/limits-at-positive-and-negative-infinity/", "keywords": "", "id": "gv9ogppphso", "title": "Limits at positive and negative infinity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gv9ogppphso.mp4/gv9ogppphso.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gv9ogppphso.mp4/gv9ogppphso.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gv9ogppphso.m3u8/gv9ogppphso.m3u8"}, "slug": "limits-at-positive-and-negative-infinity", "video_id": "gv9ogppphso", "youtube_id": "gv9ogppphso", "readable_id": "limits-at-positive-and-negative-infinity"}, "TAhRoJB34nw": {"duration": 319, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/inferior-goods-clarification/", "keywords": "economics, demand, curve", "id": "TAhRoJB34nw", "title": "Inferior goods clarification", "description": "More clarification on inferior and normal goods", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TAhRoJB34nw.mp4/TAhRoJB34nw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TAhRoJB34nw.mp4/TAhRoJB34nw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TAhRoJB34nw.m3u8/TAhRoJB34nw.m3u8"}, "slug": "inferior-goods-clarification", "video_id": "TAhRoJB34nw", "youtube_id": "TAhRoJB34nw", "readable_id": "inferior-goods-clarification"}, "pMZSDCm9tko": {"duration": 71, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-4-polygon-perimeter/", "keywords": "", "id": "pMZSDCm9tko", "title": "4 Polygon perimeter", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pMZSDCm9tko.mp4/pMZSDCm9tko.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pMZSDCm9tko.mp4/pMZSDCm9tko.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pMZSDCm9tko.m3u8/pMZSDCm9tko.m3u8"}, "slug": "sat-4-polygon-perimeter", "video_id": "pMZSDCm9tko", "youtube_id": "pMZSDCm9tko", "readable_id": "sat-4-polygon-perimeter"}, "Yd2YBLQUCEc": {"duration": 154, "path": "khan/math/algebra2/polynomial-and-rational/polynomial-end-behavior/polynomial-end-behavior-exercise-example/", "keywords": "", "id": "Yd2YBLQUCEc", "title": "Polynomial end behavior exercise example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Yd2YBLQUCEc.mp4/Yd2YBLQUCEc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Yd2YBLQUCEc.mp4/Yd2YBLQUCEc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Yd2YBLQUCEc.m3u8/Yd2YBLQUCEc.m3u8"}, "slug": "polynomial-end-behavior-exercise-example", "video_id": "Yd2YBLQUCEc", "youtube_id": "Yd2YBLQUCEc", "readable_id": "polynomial-end-behavior-exercise-example"}, "SIU_9SMd5q0": {"duration": 383, "path": "khan/test-prep/mcat/physical-processes/capacitors/energy-capacitor/", "keywords": "energy, capacitor", "id": "SIU_9SMd5q0", "title": "Energy of a capacitor", "description": "This video explains the potential of a capacitor and how they function in a circuit. By David Santo Pietro.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SIU_9SMd5q0.mp4/SIU_9SMd5q0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SIU_9SMd5q0.mp4/SIU_9SMd5q0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SIU_9SMd5q0.m3u8/SIU_9SMd5q0.m3u8"}, "slug": "energy-capacitor", "video_id": "SIU_9SMd5q0", "youtube_id": "SIU_9SMd5q0", "readable_id": "energy-capacitor"}, "tPfYrmcfvYE": {"duration": 263, "path": "khan/test-prep/ap-art-history/south-east-se-asia/china-art/forbidden-city/", "keywords": "", "id": "tPfYrmcfvYE", "title": "The Forbidden City", "description": "In 1420, in an effort to consolidate his control over the throne, the emperor of the Ming dynasty (1368\u20131644)\u00a0moved China's capital to a site in the North, now known as Bejing. There, he built a vast complex of palaces and administrative buildings now covering 178 acres. Because access was restricted to the imperial family and to those who had business with them, it came to be known as the Forbidden City. Learn more about the Ming dynasty (1368\u20131644) on the Asian Art Museum's education website.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tPfYrmcfvYE.mp4/tPfYrmcfvYE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tPfYrmcfvYE.mp4/tPfYrmcfvYE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tPfYrmcfvYE.m3u8/tPfYrmcfvYE.m3u8"}, "slug": "forbidden-city", "video_id": "tPfYrmcfvYE", "youtube_id": "tPfYrmcfvYE", "readable_id": "forbidden-city"}, "ufzlgOyWBHE": {"duration": 648, "path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-5-electron-clouds-continued/", "keywords": "", "id": "ufzlgOyWBHE", "title": "VSEPR for 5 electron clouds (continued)", "description": "Part II of using VSEPR for five electron clouds including examples for T-shaped and linear molecules.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ufzlgOyWBHE.mp4/ufzlgOyWBHE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ufzlgOyWBHE.mp4/ufzlgOyWBHE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ufzlgOyWBHE.m3u8/ufzlgOyWBHE.m3u8"}, "slug": "vsepr-for-5-electron-clouds-continued", "video_id": "ufzlgOyWBHE", "youtube_id": "ufzlgOyWBHE", "readable_id": "vsepr-for-5-electron-clouds-continued"}, "NX3M0NTYTYg": {"duration": 247, "path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/reynolds-lady-cockburn-and-her-three-eldest-sons-1773/", "keywords": "Reynolds, National Gallery, Smarthistory, Art History", "id": "NX3M0NTYTYg", "title": "Reynolds, Lady Cockburn and Her Three Eldest Sons", "description": "Sir Joshua Reynolds, Lady Cockburn and Her Three Eldest Sons, 1773, oil on canvas, 55-3/4 x 44-1/2 inches (141.5 x 113 cm) (National Gallery, London) Speakers: Pippa Couch and Rachel Ropeik", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NX3M0NTYTYg.mp4/NX3M0NTYTYg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NX3M0NTYTYg.mp4/NX3M0NTYTYg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NX3M0NTYTYg.m3u8/NX3M0NTYTYg.m3u8"}, "slug": "reynolds-lady-cockburn-and-her-three-eldest-sons-1773", "video_id": "NX3M0NTYTYg", "youtube_id": "NX3M0NTYTYg", "readable_id": "reynolds-lady-cockburn-and-her-three-eldest-sons-1773"}, "qO2cTx6DwCA": {"duration": 594, "path": "khan/math/geometry/similarity/old_school_similarity/similar-triangles-part-2/", "keywords": "geometry, triangles, similar, angles, math, CC_7_G_5, CC_8_G_5", "id": "qO2cTx6DwCA", "title": "Similar triangles (part 2)", "description": "More on similar triangles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qO2cTx6DwCA.mp4/qO2cTx6DwCA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qO2cTx6DwCA.mp4/qO2cTx6DwCA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qO2cTx6DwCA.m3u8/qO2cTx6DwCA.m3u8"}, "slug": "similar-triangles-part-2", "video_id": "qO2cTx6DwCA", "youtube_id": "qO2cTx6DwCA", "readable_id": "similar-triangles-part-2"}, "IjbJZ5jspzE": {"duration": 450, "path": "khan/test-prep/mcat/social-inequality/social-class/absolute-and-relative-poverty/", "keywords": "", "id": "IjbJZ5jspzE", "title": "Absolute and relative poverty", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IjbJZ5jspzE.mp4/IjbJZ5jspzE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IjbJZ5jspzE.mp4/IjbJZ5jspzE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IjbJZ5jspzE.m3u8/IjbJZ5jspzE.m3u8"}, "slug": "absolute-and-relative-poverty", "video_id": "IjbJZ5jspzE", "youtube_id": "IjbJZ5jspzE", "readable_id": "absolute-and-relative-poverty"}, "O_nY1TM2RZM": {"duration": 541, "path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/webers-law-and-thresholds/", "keywords": "", "id": "O_nY1TM2RZM", "title": "Weber's law and thresholds", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O_nY1TM2RZM.mp4/O_nY1TM2RZM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O_nY1TM2RZM.mp4/O_nY1TM2RZM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O_nY1TM2RZM.m3u8/O_nY1TM2RZM.m3u8"}, "slug": "webers-law-and-thresholds", "video_id": "O_nY1TM2RZM", "youtube_id": "O_nY1TM2RZM", "readable_id": "webers-law-and-thresholds"}, "SHZojeuDLjM": {"duration": 265, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/van-dyck-charles-i/", "keywords": "Charles I", "id": "SHZojeuDLjM", "title": "Anthony van Dyck, Charles I at the Hunt", "description": "Anthony van Dyck, Charles I at the Hunt, c. 1635, oil on canvas, 2.66 x 2.07 m (Mus\u00e9e du Louvre), inscribed: \"Carolus.I.REX Magnae Britanniae\" - Charles I rules Great Britain\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SHZojeuDLjM.mp4/SHZojeuDLjM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SHZojeuDLjM.mp4/SHZojeuDLjM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SHZojeuDLjM.m3u8/SHZojeuDLjM.m3u8"}, "slug": "van-dyck-charles-i", "video_id": "SHZojeuDLjM", "youtube_id": "SHZojeuDLjM", "readable_id": "van-dyck-charles-i"}, "X6zD3SoN3iY": {"duration": 187, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/core-algebra-exponent-properties/exponent-properties-4/", "keywords": "u11_l1_t2_we4, Exponent, Properties, CC_6_EE_1, CC_6_EE_2_c, CC_8_EE_1", "id": "X6zD3SoN3iY", "title": "Exponent properties 4", "description": "Exponent Properties 4", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X6zD3SoN3iY.mp4/X6zD3SoN3iY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X6zD3SoN3iY.mp4/X6zD3SoN3iY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X6zD3SoN3iY.m3u8/X6zD3SoN3iY.m3u8"}, "slug": "exponent-properties-4", "video_id": "X6zD3SoN3iY", "youtube_id": "X6zD3SoN3iY", "readable_id": "exponent-properties-4"}, "4S9Bqo_LX7k": {"duration": 317, "path": "khan/humanities/art-islam/islamic-art-medieval/royal-figures-iran-saljuq-period/", "keywords": "Royal, Figures, Iran, Saljuq, Seljuq, stucco, Metropolitan, Museum, of, Art, Islamic, Islam, sculpture, Smarthistory, Khan Academy", "id": "4S9Bqo_LX7k", "title": "Two royal figures (Saljuq Period)", "description": "A conversation between Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker in front of \"Two Royal Figures,\" Iran (Saljuq period), mid 11th - mid 12th c., painted and gilded stucco (Metropolitan Museum of Art).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4S9Bqo_LX7k.mp4/4S9Bqo_LX7k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4S9Bqo_LX7k.mp4/4S9Bqo_LX7k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4S9Bqo_LX7k.m3u8/4S9Bqo_LX7k.m3u8"}, "slug": "royal-figures-iran-saljuq-period", "video_id": "4S9Bqo_LX7k", "youtube_id": "4S9Bqo_LX7k", "readable_id": "royal-figures-iran-saljuq-period"}, "EC4wJhOEUz8": {"duration": 155, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/room-1970-1980/", "keywords": "Tate", "id": "EC4wJhOEUz8", "title": "Room: 1970s & 1980s", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Helen Little explores the 1970s & 1980s.\n\nLearn more about the art featured in this video:\n-\u00a0Tony Cragg, Stack, 1975\n- Mark Wallinger, Where There's Muck, 1985", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EC4wJhOEUz8.mp4/EC4wJhOEUz8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EC4wJhOEUz8.mp4/EC4wJhOEUz8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EC4wJhOEUz8.m3u8/EC4wJhOEUz8.m3u8"}, "slug": "room-1970-1980", "video_id": "EC4wJhOEUz8", "youtube_id": "EC4wJhOEUz8", "readable_id": "room-1970-1980"}, "o6ooV-19NLY": {"duration": 640, "path": "khan/partner-content/wi-phi/metaphys-epistemology/science-can-it-teach-us-everything/", "keywords": "", "id": "o6ooV-19NLY", "title": "Epistemology: Science, Can It Teach Us Everything?", "description": "Caspar asks: can science tell us everything there is to know about the world? He tells us about a famous argument that it can't, sometimes called 'the knowledge argument' or 'the Mary argument', due to philosopher Frank Jackson. If the argument is right, then there are certain aspects of the world that we can't learn about through science. In particular, we can't use science to learn what it is like to see red, or taste coffee, or have other experiences.\n\nSpeaker: Dr. Caspar Hare, Associate Professor, MIT", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o6ooV-19NLY.mp4/o6ooV-19NLY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o6ooV-19NLY.mp4/o6ooV-19NLY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o6ooV-19NLY.m3u8/o6ooV-19NLY.m3u8"}, "slug": "science-can-it-teach-us-everything", "video_id": "o6ooV-19NLY", "youtube_id": "o6ooV-19NLY", "readable_id": "science-can-it-teach-us-everything"}, "ddNsfv8iaps": {"duration": 753, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/electron-configurations-in-the-3d-orbitals/", "keywords": "", "id": "ddNsfv8iaps", "title": "Electron configurations in the 3d orbitals", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ddNsfv8iaps.mp4/ddNsfv8iaps.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ddNsfv8iaps.mp4/ddNsfv8iaps.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ddNsfv8iaps.m3u8/ddNsfv8iaps.m3u8"}, "slug": "electron-configurations-in-the-3d-orbitals", "video_id": "ddNsfv8iaps", "youtube_id": "ddNsfv8iaps", "readable_id": "electron-configurations-in-the-3d-orbitals"}, "tcm-v12m7hU": {"duration": 686, "path": "khan/test-prep/gmat/problem-solving/gmat-math-21/", "keywords": "GMAT, Math, problem, solving", "id": "tcm-v12m7hU", "title": "GMAT: Math 21", "description": "110-114, pgs. 166-167", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tcm-v12m7hU.mp4/tcm-v12m7hU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tcm-v12m7hU.mp4/tcm-v12m7hU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tcm-v12m7hU.m3u8/tcm-v12m7hU.m3u8"}, "slug": "gmat-math-21", "video_id": "tcm-v12m7hU", "youtube_id": "tcm-v12m7hU", "readable_id": "gmat-math-21"}, "xE2HVxOPuMM": {"duration": 211, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-6/", "keywords": "", "id": "xE2HVxOPuMM", "title": "6 Percent expenditure to actual expenditure", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xE2HVxOPuMM.mp4/xE2HVxOPuMM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xE2HVxOPuMM.mp4/xE2HVxOPuMM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xE2HVxOPuMM.m3u8/xE2HVxOPuMM.m3u8"}, "slug": "sat-getting-ready-2-6", "video_id": "xE2HVxOPuMM", "youtube_id": "xE2HVxOPuMM", "readable_id": "sat-getting-ready-2-6"}, "l5aJ1Y1CiEs": {"duration": 267, "path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/fitness-and-fecundity/", "keywords": "", "id": "l5aJ1Y1CiEs", "title": "Fitness and fecundity", "description": "Learn about the concept of fecundity and how it contributes to an organism's overall biological fitness. By Ross Firestone.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/l5aJ1Y1CiEs.mp4/l5aJ1Y1CiEs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/l5aJ1Y1CiEs.mp4/l5aJ1Y1CiEs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/l5aJ1Y1CiEs.m3u8/l5aJ1Y1CiEs.m3u8"}, "slug": "fitness-and-fecundity", "video_id": "l5aJ1Y1CiEs", "youtube_id": "l5aJ1Y1CiEs", "readable_id": "fitness-and-fecundity"}, "HvDqbzu0i0E": {"duration": 787, "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/statistics-standard-deviation/", "keywords": "statistics, standard, deviation, variance, CC_6_SP_5_a", "id": "HvDqbzu0i0E", "title": "Statistics: Standard deviation", "description": "Review of what we've learned. Introduction to the standard deviation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HvDqbzu0i0E.mp4/HvDqbzu0i0E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HvDqbzu0i0E.mp4/HvDqbzu0i0E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HvDqbzu0i0E.m3u8/HvDqbzu0i0E.m3u8"}, "slug": "statistics-standard-deviation", "video_id": "HvDqbzu0i0E", "youtube_id": "HvDqbzu0i0E", "readable_id": "statistics-standard-deviation"}, "S6_7zk_Ht_g": {"duration": 50, "path": "khan/science/discoveries-projects/discoveries/electromagnet/battery-meter-galvanometer/", "keywords": "galvanometer", "id": "S6_7zk_Ht_g", "title": "Battery meter (galvanometer)", "description": "Simple device which we can use to measure our homemade batteries. You can test it with any household battery first. What does this deflection represent? What forces are involved?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S6_7zk_Ht_g.mp4/S6_7zk_Ht_g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S6_7zk_Ht_g.mp4/S6_7zk_Ht_g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S6_7zk_Ht_g.m3u8/S6_7zk_Ht_g.m3u8"}, "slug": "battery-meter-galvanometer", "video_id": "S6_7zk_Ht_g", "youtube_id": "S6_7zk_Ht_g", "readable_id": "battery-meter-galvanometer"}, "KyHvVJWjW6Y": {"duration": 223, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/age_word_problems_tut/ex-2-age-word-problem/", "keywords": "", "id": "KyHvVJWjW6Y", "title": "Age word problem (example 2)", "description": "In 40 years, Imran will be 11 times as old as he is right now. How old is he right now?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KyHvVJWjW6Y.mp4/KyHvVJWjW6Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KyHvVJWjW6Y.mp4/KyHvVJWjW6Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KyHvVJWjW6Y.m3u8/KyHvVJWjW6Y.m3u8"}, "slug": "ex-2-age-word-problem", "video_id": "KyHvVJWjW6Y", "youtube_id": "KyHvVJWjW6Y", "readable_id": "ex-2-age-word-problem"}, "cQRJYTBozXQ": {"duration": 73, "path": "khan/college-admissions/applying-to-college/admissions-essays/ss-admissions-essay-formative-experience/", "keywords": "", "id": "cQRJYTBozXQ", "title": "Student story: Admissions essay about a formative experience", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cQRJYTBozXQ.mp4/cQRJYTBozXQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cQRJYTBozXQ.mp4/cQRJYTBozXQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cQRJYTBozXQ.m3u8/cQRJYTBozXQ.m3u8"}, "slug": "ss-admissions-essay-formative-experience", "video_id": "cQRJYTBozXQ", "youtube_id": "cQRJYTBozXQ", "readable_id": "ss-admissions-essay-formative-experience"}, "7iGjiSbEp9c": {"duration": 599, "path": "khan/partner-content/wi-phi/the-history-of-philosophy/philosophy-descartes-cogito-argument/", "keywords": "", "id": "7iGjiSbEp9c", "title": "Early Modern: Descartes' Cogito Argument", "description": "\"I think, therefore I am\" - almost everyone has heard of Ren\u00e9 Descartes' famous cogito argument. But what is this argument about? What does it show, and why are so many philosophers excited about it - even today, more than 350 years after Descartes first presented this argument?\n\nSpeaker: Dr. Stephan Schmid, Assistant Professor, Humboldt-University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7iGjiSbEp9c.mp4/7iGjiSbEp9c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7iGjiSbEp9c.mp4/7iGjiSbEp9c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7iGjiSbEp9c.m3u8/7iGjiSbEp9c.m3u8"}, "slug": "philosophy-descartes-cogito-argument", "video_id": "7iGjiSbEp9c", "youtube_id": "7iGjiSbEp9c", "readable_id": "philosophy-descartes-cogito-argument"}, "tR-hzV5Tkxo": {"duration": 724, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions/polymerization-of-alkenes-with-acid/", "keywords": "Polymerization, of, Alkenes, with, Acid", "id": "tR-hzV5Tkxo", "title": "Polymerization of alkenes with acid", "description": "Polymerization of Alkenes with Acid", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tR-hzV5Tkxo.mp4/tR-hzV5Tkxo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tR-hzV5Tkxo.mp4/tR-hzV5Tkxo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tR-hzV5Tkxo.m3u8/tR-hzV5Tkxo.m3u8"}, "slug": "polymerization-of-alkenes-with-acid", "video_id": "tR-hzV5Tkxo", "youtube_id": "tR-hzV5Tkxo", "readable_id": "polymerization-of-alkenes-with-acid"}, "6PZYYIaB0UY": {"duration": 942, "path": "khan/partner-content/big-history-project/early-humans/how-ancestors-evolved/bhp-human-evolution-crashcourse/", "keywords": "", "id": "6PZYYIaB0UY", "title": "Crash Course Big History: Human Evolution", "description": "No, we really really did not evolve from monkeys. John and Hank Green explain this and lots of other things related to human evolution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6PZYYIaB0UY.mp4/6PZYYIaB0UY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6PZYYIaB0UY.mp4/6PZYYIaB0UY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6PZYYIaB0UY.m3u8/6PZYYIaB0UY.m3u8"}, "slug": "bhp-human-evolution-crashcourse", "video_id": "6PZYYIaB0UY", "youtube_id": "6PZYYIaB0UY", "readable_id": "bhp-human-evolution-crashcourse"}, "lYLaaMObgkw": {"duration": 251, "path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/deductive-reasoning-3/", "keywords": "U12_L1_T4_we3, Deductive, Reasoning, CC_39336_A-APR_4", "id": "lYLaaMObgkw", "title": "Deductive reasoning 3", "description": "Deductive Reasoning 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lYLaaMObgkw.mp4/lYLaaMObgkw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lYLaaMObgkw.mp4/lYLaaMObgkw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lYLaaMObgkw.m3u8/lYLaaMObgkw.m3u8"}, "slug": "deductive-reasoning-3", "video_id": "lYLaaMObgkw", "youtube_id": "lYLaaMObgkw", "readable_id": "deductive-reasoning-3"}, "2IT6FcvBp_w": {"duration": 251, "path": "khan/test-prep/ap-art-history/west-and-central-asia/ibn-al-zain-basin/", "keywords": "Basin, Mamluk, Louvre, metalwork, Baptist\u00e8re, Islamic Art", "id": "2IT6FcvBp_w", "title": "Basin (Baptist\u00e8re de Saint Louis)", "description": "Mohammed ibn al-Zain, Basin (Baptist\u00e8re de Saint Louis), c. 1320-40, brass inlaid with silver and gold, 22.2 x 50.2 cm, Egypt or Syria (Mus\u00e9e du Louvre, Paris)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2IT6FcvBp_w.mp4/2IT6FcvBp_w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2IT6FcvBp_w.mp4/2IT6FcvBp_w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2IT6FcvBp_w.m3u8/2IT6FcvBp_w.m3u8"}, "slug": "ibn-al-zain-basin", "video_id": "2IT6FcvBp_w", "youtube_id": "2IT6FcvBp_w", "readable_id": "ibn-al-zain-basin"}, "A3xPhzs-KBI": {"duration": 705, "path": "khan/math/algebra/linear_inequalities/compound_absolute_value_inequali/compound-inequalities/", "keywords": "Compound, Inequalities, CC_6_EE_8, CC_6_NS_6_c, CC_6_NS_7_a, CC_7_EE_4, CC_7_EE_4_b, CC_39336_A-CED_1, CC_39336_A-CED_3, CC_39336_A-REI_3", "id": "A3xPhzs-KBI", "title": "Compound inequalities", "description": "Compound Inequalities", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A3xPhzs-KBI.mp4/A3xPhzs-KBI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A3xPhzs-KBI.mp4/A3xPhzs-KBI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A3xPhzs-KBI.m3u8/A3xPhzs-KBI.m3u8"}, "slug": "compound-inequalities", "video_id": "A3xPhzs-KBI", "youtube_id": "A3xPhzs-KBI", "readable_id": "compound-inequalities"}, "d9pO2z2qvXU": {"duration": 138, "path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/recognizing-irrational-numbers/", "keywords": "", "id": "d9pO2z2qvXU", "title": "Recognizing rational and irrational numbers (examples)", "description": "Given a bunch of numbers, learn how to tell which are rational and which are irrational.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d9pO2z2qvXU.mp4/d9pO2z2qvXU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d9pO2z2qvXU.mp4/d9pO2z2qvXU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d9pO2z2qvXU.m3u8/d9pO2z2qvXU.m3u8"}, "slug": "recognizing-irrational-numbers", "video_id": "d9pO2z2qvXU", "youtube_id": "d9pO2z2qvXU", "readable_id": "recognizing-irrational-numbers"}, "7BEbEZstN_k": {"duration": 455, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/read-thomas/of-paradise-and-light-composer-and-her-work/", "keywords": "", "id": "7BEbEZstN_k", "title": "Of Paradise and Light: The composer and her work", "description": "Watch the full performance here.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7BEbEZstN_k.mp4/7BEbEZstN_k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7BEbEZstN_k.mp4/7BEbEZstN_k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7BEbEZstN_k.m3u8/7BEbEZstN_k.m3u8"}, "slug": "of-paradise-and-light-composer-and-her-work", "video_id": "7BEbEZstN_k", "youtube_id": "7BEbEZstN_k", "readable_id": "of-paradise-and-light-composer-and-her-work"}, "y2G03Lumhe0": {"duration": 262, "path": "khan/math/probability/random-variables-topic/binomial_distribution/graphing-basketball-binomial-distribution/", "keywords": "", "id": "y2G03Lumhe0", "title": "Graphing basketball binomial distribution", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y2G03Lumhe0.mp4/y2G03Lumhe0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y2G03Lumhe0.mp4/y2G03Lumhe0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y2G03Lumhe0.m3u8/y2G03Lumhe0.m3u8"}, "slug": "graphing-basketball-binomial-distribution", "video_id": "y2G03Lumhe0", "youtube_id": "y2G03Lumhe0", "readable_id": "graphing-basketball-binomial-distribution"}, "2aiRpr5UCZs": {"duration": 517, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/what-is-heart-failure/", "keywords": "", "id": "2aiRpr5UCZs", "title": "What is heart failure?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2aiRpr5UCZs.mp4/2aiRpr5UCZs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2aiRpr5UCZs.mp4/2aiRpr5UCZs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2aiRpr5UCZs.m3u8/2aiRpr5UCZs.m3u8"}, "slug": "what-is-heart-failure", "video_id": "2aiRpr5UCZs", "youtube_id": "2aiRpr5UCZs", "readable_id": "what-is-heart-failure"}, "2EJzrIKtKok": {"duration": 158, "path": "khan/partner-content/big-history-project/acceleration/bhp-acceleration/bhp-threshold8/", "keywords": "", "id": "2EJzrIKtKok", "title": "Threshold 8: The Modern Revolution", "description": "The Modern Revolution began about 200 ago and created the world we live in today.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2EJzrIKtKok.mp4/2EJzrIKtKok.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2EJzrIKtKok.mp4/2EJzrIKtKok.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2EJzrIKtKok.m3u8/2EJzrIKtKok.m3u8"}, "slug": "bhp-threshold8", "video_id": "2EJzrIKtKok", "youtube_id": "2EJzrIKtKok", "readable_id": "bhp-threshold8"}, "sjMsyk-rP8I": {"duration": 683, "path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/aldol-condensation/", "keywords": "", "id": "sjMsyk-rP8I", "title": "Aldol condensation", "description": "Base-catalyzed mechanism for aldol addition and aldol condensation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sjMsyk-rP8I.mp4/sjMsyk-rP8I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sjMsyk-rP8I.mp4/sjMsyk-rP8I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sjMsyk-rP8I.m3u8/sjMsyk-rP8I.m3u8"}, "slug": "aldol-condensation", "video_id": "sjMsyk-rP8I", "youtube_id": "sjMsyk-rP8I", "readable_id": "aldol-condensation"}, "SwqOrUWzDY8": {"duration": 358, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/core-algebra-exponent-properties/products-and-exponents-raised-to-an-exponent-properties/", "keywords": "", "id": "SwqOrUWzDY8", "title": "Exponent properties: products and exponents raised to an exponent", "description": "Learn two exponent properties: (ab)^c and (a^b)^c. See WHY they work and HOW to use them.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SwqOrUWzDY8.mp4/SwqOrUWzDY8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SwqOrUWzDY8.mp4/SwqOrUWzDY8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SwqOrUWzDY8.m3u8/SwqOrUWzDY8.m3u8"}, "slug": "products-and-exponents-raised-to-an-exponent-properties", "video_id": "SwqOrUWzDY8", "youtube_id": "SwqOrUWzDY8", "readable_id": "products-and-exponents-raised-to-an-exponent-properties"}, "hCFtl4npukU": {"duration": 318, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/modern-ways-of-studying-the-brain/", "keywords": "", "id": "hCFtl4npukU", "title": "Modern ways of studying the brain", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hCFtl4npukU.mp4/hCFtl4npukU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hCFtl4npukU.mp4/hCFtl4npukU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hCFtl4npukU.m3u8/hCFtl4npukU.m3u8"}, "slug": "modern-ways-of-studying-the-brain", "video_id": "hCFtl4npukU", "youtube_id": "hCFtl4npukU", "readable_id": "modern-ways-of-studying-the-brain"}, "PueYywpkJW8": {"duration": 882, "path": "khan/test-prep/ap-art-history/global-contemporary/ai-weiwei/", "keywords": "Tate", "id": "PueYywpkJW8", "title": "Ai Weiwei: Sunflower Seeds", "description": "This video brought to you by\u00a0Tate.org.uk\n\nIn the process of crafting millions of porcelain sunflower seeds, Chinese artist Ai WeiWei creates a work of art as well as a positive social project for the village in rural China he employed to make the seeds.\u00a0Follow Sunflower Seeds\u00a0on its remarkable journey from conception to delivery, and hear the artist talk about his unique socio-political approach to making art.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PueYywpkJW8.mp4/PueYywpkJW8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PueYywpkJW8.mp4/PueYywpkJW8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PueYywpkJW8.m3u8/PueYywpkJW8.m3u8"}, "slug": "ai-weiwei", "video_id": "PueYywpkJW8", "youtube_id": "PueYywpkJW8", "readable_id": "ai-weiwei"}, "BNmOZO9hbb0": {"duration": 631, "path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-stability-iv/", "keywords": "", "id": "BNmOZO9hbb0", "title": "Aromatic stability IV", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BNmOZO9hbb0.mp4/BNmOZO9hbb0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BNmOZO9hbb0.mp4/BNmOZO9hbb0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BNmOZO9hbb0.m3u8/BNmOZO9hbb0.m3u8"}, "slug": "aromatic-stability-iv", "video_id": "BNmOZO9hbb0", "youtube_id": "BNmOZO9hbb0", "readable_id": "aromatic-stability-iv"}, "5i8HLmVTcRQ": {"duration": 216, "path": "khan/math/differential-calculus/limits_topic/epsilon_delta/limit-intuition-review/", "keywords": "", "id": "5i8HLmVTcRQ", "title": "Limit intuition review", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5i8HLmVTcRQ.mp4/5i8HLmVTcRQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5i8HLmVTcRQ.mp4/5i8HLmVTcRQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5i8HLmVTcRQ.m3u8/5i8HLmVTcRQ.m3u8"}, "slug": "limit-intuition-review", "video_id": "5i8HLmVTcRQ", "youtube_id": "5i8HLmVTcRQ", "readable_id": "limit-intuition-review"}, "l2VrAsu0KeE": {"duration": 167, "path": "khan/humanities/global-culture/identity-body/identity-body-united-states/weems-from-here-i-saw-what-happened/", "keywords": "", "id": "l2VrAsu0KeE", "title": "Carrie Mae Weems on her series \"From Here I Saw What Happened and I Cried\"", "description": "Combining text and photography, contemporary artist Carrie Mae Weems explores the notion of a narrative within her work. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/l2VrAsu0KeE.mp4/l2VrAsu0KeE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/l2VrAsu0KeE.mp4/l2VrAsu0KeE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/l2VrAsu0KeE.m3u8/l2VrAsu0KeE.m3u8"}, "slug": "weems-from-here-i-saw-what-happened", "video_id": "l2VrAsu0KeE", "youtube_id": "l2VrAsu0KeE", "readable_id": "weems-from-here-i-saw-what-happened"}, "4o4P7KrkzXg": {"duration": 251, "path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-3/", "keywords": "", "id": "4o4P7KrkzXg", "title": "Stokes' theorem proof part 3", "description": "Writing our surface integral as a double integral over the domain of our parameters", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4o4P7KrkzXg.mp4/4o4P7KrkzXg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4o4P7KrkzXg.mp4/4o4P7KrkzXg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4o4P7KrkzXg.m3u8/4o4P7KrkzXg.m3u8"}, "slug": "stokes-theorem-proof-part-3", "video_id": "4o4P7KrkzXg", "youtube_id": "4o4P7KrkzXg", "readable_id": "stokes-theorem-proof-part-3"}, "9Wfn-WWV1aY": {"duration": 441, "path": "khan/math/differential-equations/first-order-differential-equations/homogeneous-equations/first-order-homegenous-equations/", "keywords": "first, order, homogenous, differential, equations", "id": "9Wfn-WWV1aY", "title": "First order homogenous equations", "description": "Introduction to first order homogenous equations.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9Wfn-WWV1aY.mp4/9Wfn-WWV1aY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9Wfn-WWV1aY.mp4/9Wfn-WWV1aY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9Wfn-WWV1aY.m3u8/9Wfn-WWV1aY.m3u8"}, "slug": "first-order-homegenous-equations", "video_id": "9Wfn-WWV1aY", "youtube_id": "9Wfn-WWV1aY", "readable_id": "first-order-homegenous-equations"}, "KgrLUQYgIJE": {"duration": 505, "path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/more-on-total-revenue-and-elasticity/", "keywords": "microeconomics, elasticity", "id": "KgrLUQYgIJE", "title": "More on total revenue and elasticity", "description": "Clarification on the relationship between total revenue and elasticity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KgrLUQYgIJE.mp4/KgrLUQYgIJE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KgrLUQYgIJE.mp4/KgrLUQYgIJE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KgrLUQYgIJE.m3u8/KgrLUQYgIJE.m3u8"}, "slug": "more-on-total-revenue-and-elasticity", "video_id": "KgrLUQYgIJE", "youtube_id": "KgrLUQYgIJE", "readable_id": "more-on-total-revenue-and-elasticity"}, "E1P79uFLCMc": {"duration": 596, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/ozone-layer-and-eukaryotes-show-up-in-the-proterozoic-eon/", "keywords": "Ozone, Layer, and, Eukaryotes, Show, Up, in, the, Proterozoic, Eon", "id": "E1P79uFLCMc", "title": "Ozone layer and eukaryotes show up in the Proterozoic eon", "description": "Ozone Layer and Eukaryotes Show Up in the Proterozoic Eon. Great Oxygenation Event (Oxygen Catastrophe)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E1P79uFLCMc.mp4/E1P79uFLCMc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E1P79uFLCMc.mp4/E1P79uFLCMc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E1P79uFLCMc.m3u8/E1P79uFLCMc.m3u8"}, "slug": "ozone-layer-and-eukaryotes-show-up-in-the-proterozoic-eon", "video_id": "E1P79uFLCMc", "youtube_id": "E1P79uFLCMc", "readable_id": "ozone-layer-and-eukaryotes-show-up-in-the-proterozoic-eon"}, "HALbfdYE3hM": {"duration": 524, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/oboe-interview/", "keywords": "", "id": "HALbfdYE3hM", "title": "Oboe: Interview and demonstration with principal John Ferrillo", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HALbfdYE3hM.mp4/HALbfdYE3hM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HALbfdYE3hM.mp4/HALbfdYE3hM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HALbfdYE3hM.m3u8/HALbfdYE3hM.m3u8"}, "slug": "oboe-interview", "video_id": "HALbfdYE3hM", "youtube_id": "HALbfdYE3hM", "readable_id": "oboe-interview"}, "LKzpw_HUKNQ": {"duration": 494, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/part-2-of-washer-for-not-axis-rotation/", "keywords": "", "id": "LKzpw_HUKNQ", "title": "Part 2 of washer for non axis rotation", "description": "Doing some hairy algebra and arithmetic to evaluate the definite integral from the last video", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LKzpw_HUKNQ.mp4/LKzpw_HUKNQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LKzpw_HUKNQ.mp4/LKzpw_HUKNQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LKzpw_HUKNQ.m3u8/LKzpw_HUKNQ.m3u8"}, "slug": "part-2-of-washer-for-not-axis-rotation", "video_id": "LKzpw_HUKNQ", "youtube_id": "LKzpw_HUKNQ", "readable_id": "part-2-of-washer-for-not-axis-rotation"}, "gJfOlBMfYkg": {"duration": 730, "path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/definition-of-ph/", "keywords": "", "id": "gJfOlBMfYkg", "title": "Definition of pH", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gJfOlBMfYkg.mp4/gJfOlBMfYkg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gJfOlBMfYkg.mp4/gJfOlBMfYkg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gJfOlBMfYkg.m3u8/gJfOlBMfYkg.m3u8"}, "slug": "definition-of-ph", "video_id": "gJfOlBMfYkg", "youtube_id": "gJfOlBMfYkg", "readable_id": "definition-of-ph"}, "MQct5EFQ9x8": {"duration": 275, "path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/giotto-st-francis-receiving-the-stigmata-c-1295-1300/", "keywords": "Mus\u00e9e du Louvre", "id": "MQct5EFQ9x8", "title": "Giotto, St. Francis Receiving the Stigmata", "description": "Giotto di Bondone, St. Francis of Assisi Receiving the Stigmata with predella scenes of the Dream of Innocent III, The Pope Approving the Rule of the Order, and St. Francis Preaching to the Birds, c. 1295-1300 (originally, Church of San Francesco, Pisa), tempera and gold on panel, 3.13 x 1.63 m, original frame inscribed: \"OPUS IOCTI FIORETINI. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MQct5EFQ9x8.mp4/MQct5EFQ9x8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MQct5EFQ9x8.mp4/MQct5EFQ9x8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MQct5EFQ9x8.m3u8/MQct5EFQ9x8.m3u8"}, "slug": "giotto-st-francis-receiving-the-stigmata-c-1295-1300", "video_id": "MQct5EFQ9x8", "youtube_id": "MQct5EFQ9x8", "readable_id": "giotto-st-francis-receiving-the-stigmata-c-1295-1300"}, "tOVJgYHj6kc": {"duration": 679, "path": "khan/test-prep/mcat/behavior/psychological-disorders/depression-and-major-depressive-disorder/", "keywords": "Major Depression (Disease Or Medical Condition),Depression (Symptom),Health (Industry),Mental Illness (Disease Or Medical Condition)", "id": "tOVJgYHj6kc", "title": "Depression and major depressive disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tOVJgYHj6kc.mp4/tOVJgYHj6kc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tOVJgYHj6kc.mp4/tOVJgYHj6kc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tOVJgYHj6kc.m3u8/tOVJgYHj6kc.m3u8"}, "slug": "depression-and-major-depressive-disorder", "video_id": "tOVJgYHj6kc", "youtube_id": "tOVJgYHj6kc", "readable_id": "depression-and-major-depressive-disorder"}, "dpGmVV0-4jc": {"duration": 469, "path": "khan/math/probability/probability-and-combinatorics-topic/decisions-with-probability/idea-behind-hypothesis-testing/", "keywords": "", "id": "dpGmVV0-4jc", "title": "Idea behind hypothesis testing", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dpGmVV0-4jc.mp4/dpGmVV0-4jc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dpGmVV0-4jc.mp4/dpGmVV0-4jc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dpGmVV0-4jc.m3u8/dpGmVV0-4jc.m3u8"}, "slug": "idea-behind-hypothesis-testing", "video_id": "dpGmVV0-4jc", "youtube_id": "dpGmVV0-4jc", "readable_id": "idea-behind-hypothesis-testing"}, "D9uJxXnDTU8": {"duration": 163, "path": "khan/test-prep/ap-art-history/indigenous-americas/olmec-mask/", "keywords": "Olmec AP art history", "id": "D9uJxXnDTU8", "title": "Olmec mask (Olmec-style mask)", "description": "Olmec mask (Olmec-style mask), c. 1200 - 400 B.C.E., jadeite, 4 x 3-3/8 x 1-1/4 inches found in offering 20 buried c. 1470 C.E. at the Aztec Templo Mayor (Museo del Templo Mayor, Mexico City)\nSpeakers: Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker\n\nItems buried in offerings included ceramic vessels, stone sculptures, obsidian blades, seashells, greenstone, and objects gathered from earlier locales (like Olmec sites and the city of Teotihuacan).\u00a0The Olmecs are known as \u201crubber people,\u201d a name given to the peoples of the Gulf Coast after the Spanish Conquest. We don\u2019t know what they called themselves.\u00a0Jadeite was quarried in the Sierra de las Minas in Guatemala, and was imported to the Gulf Coast of Mexico.\u00a0Items acquired via trade or tribute [by the Aztecs] included feathers, obsidian, jadeite, cotton, cacao, and turquoise.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D9uJxXnDTU8.mp4/D9uJxXnDTU8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D9uJxXnDTU8.mp4/D9uJxXnDTU8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D9uJxXnDTU8.m3u8/D9uJxXnDTU8.m3u8"}, "slug": "olmec-mask", "video_id": "D9uJxXnDTU8", "youtube_id": "D9uJxXnDTU8", "readable_id": "olmec-mask"}, "a5uNoOnEy_A": {"duration": 901, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/complicated_equations/multi-step-equations/", "keywords": "Multi, Step, Equations, CC_39336_A-REI_3", "id": "a5uNoOnEy_A", "title": "Ex 1: Distributive property to simplify", "description": "Let's do a few examples (including a word problem) in which we put the distributive property to work solving multi-step equations.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a5uNoOnEy_A.mp4/a5uNoOnEy_A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a5uNoOnEy_A.mp4/a5uNoOnEy_A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a5uNoOnEy_A.m3u8/a5uNoOnEy_A.m3u8"}, "slug": "multi-step-equations", "video_id": "a5uNoOnEy_A", "youtube_id": "a5uNoOnEy_A", "readable_id": "multi-step-equations"}, "9e9GWdT2pEQ": {"duration": 1061, "path": "khan/humanities/history/euro-hist/cold-war/vietnam-war/", "keywords": "Ho, Chi, Minh, Viet, Cong, Domino, theory, containment", "id": "9e9GWdT2pEQ", "title": "Vietnam War", "description": "Overview of the Vietnam War", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9e9GWdT2pEQ.mp4/9e9GWdT2pEQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9e9GWdT2pEQ.mp4/9e9GWdT2pEQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9e9GWdT2pEQ.m3u8/9e9GWdT2pEQ.m3u8"}, "slug": "vietnam-war", "video_id": "9e9GWdT2pEQ", "youtube_id": "9e9GWdT2pEQ", "readable_id": "vietnam-war"}, "bm65xCS5ivo": {"duration": 733, "path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/layers-of-the-heart/", "keywords": "", "id": "bm65xCS5ivo", "title": "Layers of the heart", "description": "Take a closer look at the heart, explore some of its interesting features and get to know the three layers that make up the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bm65xCS5ivo.mp4/bm65xCS5ivo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bm65xCS5ivo.mp4/bm65xCS5ivo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bm65xCS5ivo.m3u8/bm65xCS5ivo.m3u8"}, "slug": "layers-of-the-heart", "video_id": "bm65xCS5ivo", "youtube_id": "bm65xCS5ivo", "readable_id": "layers-of-the-heart"}, "AgQMgxkYk44": {"duration": 390, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-occupational-lung-diseases/occupational-asthma-and-mesothelioma/", "keywords": "", "id": "AgQMgxkYk44", "title": "Occupational asthma and mesothelioma", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AgQMgxkYk44.mp4/AgQMgxkYk44.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AgQMgxkYk44.mp4/AgQMgxkYk44.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AgQMgxkYk44.m3u8/AgQMgxkYk44.m3u8"}, "slug": "occupational-asthma-and-mesothelioma", "video_id": "AgQMgxkYk44", "youtube_id": "AgQMgxkYk44", "readable_id": "occupational-asthma-and-mesothelioma"}, "iPROoc_o0p8": {"duration": 416, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/income-inequality/", "keywords": "", "id": "iPROoc_o0p8", "title": "Connecting income to capital growth and potential inequality", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iPROoc_o0p8.mp4/iPROoc_o0p8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iPROoc_o0p8.mp4/iPROoc_o0p8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iPROoc_o0p8.m3u8/iPROoc_o0p8.m3u8"}, "slug": "income-inequality", "video_id": "iPROoc_o0p8", "youtube_id": "iPROoc_o0p8", "readable_id": "income-inequality"}, "CyNjK7dv-IM": {"duration": 195, "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/delacroix-scene-of-the-massacre-at-chios-greek-families-awaiting-death-or-slavery-1824/", "keywords": "Delacroix, Chios, Louvre, Art History, Smarthistory, Eug\u00e8ne Delacroix", "id": "CyNjK7dv-IM", "title": "Delacroix, Scene of the massacre at Chios", "description": "Eug\u00e8ne Delacroix, Scene of the massacre at Chios; Greek families awaiting death or slavery, 1824 Salon, oil on canvas, 164\" \u00d7 139\" (419 cm \u00d7 354 cm) (Mus\u00e9e du Louvre, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker http://www.smarthistory.org/delacroix-scene-massacre-chios.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CyNjK7dv-IM.mp4/CyNjK7dv-IM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CyNjK7dv-IM.mp4/CyNjK7dv-IM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CyNjK7dv-IM.m3u8/CyNjK7dv-IM.m3u8"}, "slug": "delacroix-scene-of-the-massacre-at-chios-greek-families-awaiting-death-or-slavery-1824", "video_id": "CyNjK7dv-IM", "youtube_id": "CyNjK7dv-IM", "readable_id": "delacroix-scene-of-the-massacre-at-chios-greek-families-awaiting-death-or-slavery-1824"}, "7FQWBCeVIJM": {"duration": 347, "path": "khan/math/integral-calculus/integration-techniques/reverse-chain-rule/reverse-chain-rule-example/", "keywords": "", "id": "7FQWBCeVIJM", "title": "Reverse chain rule example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7FQWBCeVIJM.mp4/7FQWBCeVIJM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7FQWBCeVIJM.mp4/7FQWBCeVIJM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7FQWBCeVIJM.m3u8/7FQWBCeVIJM.m3u8"}, "slug": "reverse-chain-rule-example", "video_id": "7FQWBCeVIJM", "youtube_id": "7FQWBCeVIJM", "readable_id": "reverse-chain-rule-example"}, "tUvpwdqdLlI": {"duration": 667, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/nickel-cadmium-battery/", "keywords": "", "id": "tUvpwdqdLlI", "title": "Nickel-cadmium battery", "description": "Balancing the redox reaction (in base) that occurs in a nickel-cadmium battery.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tUvpwdqdLlI.mp4/tUvpwdqdLlI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tUvpwdqdLlI.mp4/tUvpwdqdLlI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tUvpwdqdLlI.m3u8/tUvpwdqdLlI.m3u8"}, "slug": "nickel-cadmium-battery", "video_id": "tUvpwdqdLlI", "youtube_id": "tUvpwdqdLlI", "readable_id": "nickel-cadmium-battery"}, "meibWcbGqt4": {"duration": 814, "path": "khan/math/linear-algebra/alternate_bases/change_of_basis/lin-alg-invertible-change-of-basis-matrix/", "keywords": "change, of, basis, matrix, coordinate, system", "id": "meibWcbGqt4", "title": "Invertible change of basis matrix", "description": "Using an invertible change of basis matrix to go between different coordinate systems", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/meibWcbGqt4.mp4/meibWcbGqt4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/meibWcbGqt4.mp4/meibWcbGqt4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/meibWcbGqt4.m3u8/meibWcbGqt4.m3u8"}, "slug": "lin-alg-invertible-change-of-basis-matrix", "video_id": "meibWcbGqt4", "youtube_id": "meibWcbGqt4", "readable_id": "lin-alg-invertible-change-of-basis-matrix"}, "RjpT4Apgda8": {"duration": 302, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/peplos-kore/", "keywords": "Peplos, Kore, Acropolis, Athens, Greece, sculpture", "id": "RjpT4Apgda8", "title": "Peplos Kore from the Acropolis", "description": "Peplos Kore, c. 530 B.C.E., from the Acropolis, Athens, Greece (Acropolis Museum, Athens)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RjpT4Apgda8.mp4/RjpT4Apgda8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RjpT4Apgda8.mp4/RjpT4Apgda8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RjpT4Apgda8.m3u8/RjpT4Apgda8.m3u8"}, "slug": "peplos-kore", "video_id": "RjpT4Apgda8", "youtube_id": "RjpT4Apgda8", "readable_id": "peplos-kore"}, "Mt4dpGFVsYc": {"duration": 572, "path": "khan/math/multivariable-calculus/partial_derivatives_topic/curl/curl-1/", "keywords": "curl, vector, field", "id": "Mt4dpGFVsYc", "title": "Curl 1", "description": "Introduction to the curl of a vector field", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mt4dpGFVsYc.mp4/Mt4dpGFVsYc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mt4dpGFVsYc.mp4/Mt4dpGFVsYc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mt4dpGFVsYc.m3u8/Mt4dpGFVsYc.m3u8"}, "slug": "curl-1", "video_id": "Mt4dpGFVsYc", "youtube_id": "Mt4dpGFVsYc", "readable_id": "curl-1"}, "sHkZWu9tgpw": {"duration": 478, "path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/dix-portrait-of-sylvia-von-harden-1926/", "keywords": "Otto Dix, German art, Art History Neue Sachlichkeit, New Objectivity, Portraiture, Weimar Era, modern art, Smarthistory", "id": "sHkZWu9tgpw", "title": "Dix, Portrait of the Journalist Sylvia von Harden", "description": "Otto Dix, Portrait of the Journalist Sylvia von Harden, 1926 (Mus\u00e9e National d'Art Moderne, Centre Georges Pompidou, Paris)\n\n\nSpeakers: Dr. Juliana Kreinik, Chad Laird\n\nFor more videos, visit www.smarthistory.org", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sHkZWu9tgpw.mp4/sHkZWu9tgpw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sHkZWu9tgpw.mp4/sHkZWu9tgpw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sHkZWu9tgpw.m3u8/sHkZWu9tgpw.m3u8"}, "slug": "dix-portrait-of-sylvia-von-harden-1926", "video_id": "sHkZWu9tgpw", "youtube_id": "sHkZWu9tgpw", "readable_id": "dix-portrait-of-sylvia-von-harden-1926"}, "Msrym4oGVSk": {"duration": 436, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/basics-of-egg-development/", "keywords": "", "id": "Msrym4oGVSk", "title": "Basics of egg development", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Msrym4oGVSk.mp4/Msrym4oGVSk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Msrym4oGVSk.mp4/Msrym4oGVSk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Msrym4oGVSk.m3u8/Msrym4oGVSk.m3u8"}, "slug": "basics-of-egg-development", "video_id": "Msrym4oGVSk", "youtube_id": "Msrym4oGVSk", "readable_id": "basics-of-egg-development"}, "2pE7GUzW6-4": {"duration": 86, "path": "khan/computing/computer-programming/html-css-js/html-js-dom-events/making-webpages-interactive-with-events/", "keywords": "", "id": "2pE7GUzW6-4", "title": "Making webpages interactive with events", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2pE7GUzW6-4.mp4/2pE7GUzW6-4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2pE7GUzW6-4.mp4/2pE7GUzW6-4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2pE7GUzW6-4.m3u8/2pE7GUzW6-4.m3u8"}, "slug": "making-webpages-interactive-with-events", "video_id": "2pE7GUzW6-4", "youtube_id": "2pE7GUzW6-4", "readable_id": "making-webpages-interactive-with-events"}, "-ScrE9jd4Do": {"duration": 102, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-6-5/", "keywords": "", "id": "-ScrE9jd4Do", "title": "5 Equations that match constraints", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-ScrE9jd4Do.mp4/-ScrE9jd4Do.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-ScrE9jd4Do.mp4/-ScrE9jd4Do.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-ScrE9jd4Do.m3u8/-ScrE9jd4Do.m3u8"}, "slug": "sat-2010-may-6-5", "video_id": "-ScrE9jd4Do", "youtube_id": "-ScrE9jd4Do", "readable_id": "sat-2010-may-6-5"}, "SSf1HenQhWs": {"duration": 154, "path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-martian-year/", "keywords": "", "id": "SSf1HenQhWs", "title": "Curiosity completes its first martian year", "description": "On June 24, 2014, NASA's Curiosity rover completes her first Martian year (687 Earth days). Hear team members describe how the mission accomplished its main goal to find a past habitable environment on the Red Planet and the ongoing science studies.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SSf1HenQhWs.mp4/SSf1HenQhWs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SSf1HenQhWs.mp4/SSf1HenQhWs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SSf1HenQhWs.m3u8/SSf1HenQhWs.m3u8"}, "slug": "curiosity-rover-report-martian-year", "video_id": "SSf1HenQhWs", "youtube_id": "SSf1HenQhWs", "readable_id": "curiosity-rover-report-martian-year"}, "-RT52vs9tBI": {"duration": 112, "path": "khan/math/pre-algebra/order-of-operations/arithmetic_properties/properties-of-numbers-2/", "keywords": "", "id": "-RT52vs9tBI", "title": "Properties of numbers 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-RT52vs9tBI.mp4/-RT52vs9tBI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-RT52vs9tBI.mp4/-RT52vs9tBI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-RT52vs9tBI.m3u8/-RT52vs9tBI.m3u8"}, "slug": "properties-of-numbers-2", "video_id": "-RT52vs9tBI", "youtube_id": "-RT52vs9tBI", "readable_id": "properties-of-numbers-2"}, "mw-rwhpAQe4": {"duration": 327, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells/microglia/", "keywords": "", "id": "mw-rwhpAQe4", "title": "Microglia", "description": "This video describes the structure and function of microglia.\u00a0 By Matt Jensen.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mw-rwhpAQe4.mp4/mw-rwhpAQe4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mw-rwhpAQe4.mp4/mw-rwhpAQe4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mw-rwhpAQe4.m3u8/mw-rwhpAQe4.m3u8"}, "slug": "microglia", "video_id": "mw-rwhpAQe4", "youtube_id": "mw-rwhpAQe4", "readable_id": "microglia"}, "muJatqh6wRM": {"duration": 192, "path": "khan/humanities/becoming-modern/symbolism/franz-von-stuck-the-sin-1893/", "keywords": "", "id": "muJatqh6wRM", "title": "Stuck, The Sin", "description": "Franz von Stuck, The Sin, 1893 (Neue Pinakothek, Munich) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/muJatqh6wRM.mp4/muJatqh6wRM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/muJatqh6wRM.mp4/muJatqh6wRM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/muJatqh6wRM.m3u8/muJatqh6wRM.m3u8"}, "slug": "franz-von-stuck-the-sin-1893", "video_id": "muJatqh6wRM", "youtube_id": "muJatqh6wRM", "readable_id": "franz-von-stuck-the-sin-1893"}, "zdvKhaQxvag": {"duration": 463, "path": "khan/science/biology/structure-of-a-cell/cytoskeleton-junctions-and-extracellular-structures/plant-cell-walls/", "keywords": "education,online learning,learning,lessons,plant cells,cell wall,plasmodesmata,middle lamella,cellulose,pectin,Plant (Organism Classification),Cell (Anatomical Structure)", "id": "zdvKhaQxvag", "title": "Plant cell walls", "description": "Understanding the structure of plant cell walls.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zdvKhaQxvag.mp4/zdvKhaQxvag.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zdvKhaQxvag.mp4/zdvKhaQxvag.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zdvKhaQxvag.m3u8/zdvKhaQxvag.m3u8"}, "slug": "plant-cell-walls", "video_id": "zdvKhaQxvag", "youtube_id": "zdvKhaQxvag", "readable_id": "plant-cell-walls"}, "R486L0M5cWk": {"duration": 507, "path": "khan/math/arithmetic/multiplication-division/partial_quotient_division/partial-quotient-division/", "keywords": "arithmetic, mental, math", "id": "R486L0M5cWk", "title": "Partial quotient method of division", "description": "An alternate to traditional long division", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R486L0M5cWk.mp4/R486L0M5cWk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R486L0M5cWk.mp4/R486L0M5cWk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R486L0M5cWk.m3u8/R486L0M5cWk.m3u8"}, "slug": "partial-quotient-division", "video_id": "R486L0M5cWk", "youtube_id": "R486L0M5cWk", "readable_id": "partial-quotient-division"}, "IJWDyPFXGyM": {"duration": 263, "path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/finding-a-piecewise-function-definition-from-graph/", "keywords": "", "id": "IJWDyPFXGyM", "title": "Finding a piecewise function definition from graph", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IJWDyPFXGyM.mp4/IJWDyPFXGyM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IJWDyPFXGyM.mp4/IJWDyPFXGyM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IJWDyPFXGyM.m3u8/IJWDyPFXGyM.m3u8"}, "slug": "finding-a-piecewise-function-definition-from-graph", "video_id": "IJWDyPFXGyM", "youtube_id": "IJWDyPFXGyM", "readable_id": "finding-a-piecewise-function-definition-from-graph"}, "vN7O7zsRKb8": {"duration": 561, "path": "khan/test-prep/mcat/chemical-processes/kinetics/plotting-data-for-a-first-order-reaction/", "keywords": "", "id": "vN7O7zsRKb8", "title": "Plotting data for a first-order reaction", "description": "Example of graphing first-order rate data to see a linear relationship, and calculating rate constant k from the slope.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vN7O7zsRKb8.mp4/vN7O7zsRKb8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vN7O7zsRKb8.mp4/vN7O7zsRKb8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vN7O7zsRKb8.m3u8/vN7O7zsRKb8.m3u8"}, "slug": "plotting-data-for-a-first-order-reaction", "video_id": "vN7O7zsRKb8", "youtube_id": "vN7O7zsRKb8", "readable_id": "plotting-data-for-a-first-order-reaction"}, "unSBFwK881s": {"duration": 483, "path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphing-inequalities/", "keywords": "Graphing, Inequalities", "id": "unSBFwK881s", "title": "Introduction to graphing inequalities", "description": "Learn how to graph two-variable linear inequalities.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/unSBFwK881s.mp4/unSBFwK881s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/unSBFwK881s.mp4/unSBFwK881s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/unSBFwK881s.m3u8/unSBFwK881s.m3u8"}, "slug": "graphing-inequalities", "video_id": "unSBFwK881s", "youtube_id": "unSBFwK881s", "readable_id": "graphing-inequalities"}, "NW9JfMvIsxw": {"duration": 718, "path": "khan/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation/repeated-roots-of-the-characteristic-equation/", "keywords": "differential, equations, reduction, of, order", "id": "NW9JfMvIsxw", "title": "Repeated roots of the characteristic equation", "description": "What happens when the characteristic equation only has 1 repeated root?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NW9JfMvIsxw.mp4/NW9JfMvIsxw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NW9JfMvIsxw.mp4/NW9JfMvIsxw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NW9JfMvIsxw.m3u8/NW9JfMvIsxw.m3u8"}, "slug": "repeated-roots-of-the-characteristic-equation", "video_id": "NW9JfMvIsxw", "youtube_id": "NW9JfMvIsxw", "readable_id": "repeated-roots-of-the-characteristic-equation"}, "0b2Tl0x-niw": {"duration": 398, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/externalities-topic/tragedy-of-the-commons/", "keywords": "microeconomics", "id": "0b2Tl0x-niw", "title": "Tragedy of the commons", "description": "How public resources can be abused", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0b2Tl0x-niw.mp4/0b2Tl0x-niw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0b2Tl0x-niw.mp4/0b2Tl0x-niw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0b2Tl0x-niw.m3u8/0b2Tl0x-niw.m3u8"}, "slug": "tragedy-of-the-commons", "video_id": "0b2Tl0x-niw", "youtube_id": "0b2Tl0x-niw", "readable_id": "tragedy-of-the-commons"}, "GwTehaUOkhg": {"duration": 311, "path": "khan/humanities/global-culture/global-art-architecture/shirazeh-houshiary/", "keywords": "Tate", "id": "GwTehaUOkhg", "title": "Shirazeh Houshiary", "description": "This video brought to you by\u00a0Tate.org.uk\n\nBorn in Iran, Shirazeh Houshiary has lived and worked in England since 1973, consistently drawing on modern sensibilities as well as Islamic traditions, particularly Sufi mysticism. Here she discusses works like Veil\u00a0(1999), returning to themes of light and darkness, visual perception and judgement, explaining: \"I'm trying to explore how we see the world.\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GwTehaUOkhg.mp4/GwTehaUOkhg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GwTehaUOkhg.mp4/GwTehaUOkhg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GwTehaUOkhg.m3u8/GwTehaUOkhg.m3u8"}, "slug": "shirazeh-houshiary", "video_id": "GwTehaUOkhg", "youtube_id": "GwTehaUOkhg", "readable_id": "shirazeh-houshiary"}, "Dq0xFgQB9qo": {"duration": 100, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/solutions-linear-equations/number-of-solutions-to-linear-equations-ex-3/", "keywords": "", "id": "Dq0xFgQB9qo", "title": "How to make an equation with infinitely many solutions (example)", "description": "Sal shows how to complete the equation 4(x - 2) + x = 5x + __ so that it has infinitely many solutions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Dq0xFgQB9qo.mp4/Dq0xFgQB9qo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Dq0xFgQB9qo.mp4/Dq0xFgQB9qo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Dq0xFgQB9qo.m3u8/Dq0xFgQB9qo.m3u8"}, "slug": "number-of-solutions-to-linear-equations-ex-3", "video_id": "Dq0xFgQB9qo", "youtube_id": "Dq0xFgQB9qo", "readable_id": "number-of-solutions-to-linear-equations-ex-3"}, "3ia-sGkAVf8": {"duration": 601, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-16/", "keywords": "gmat, data, sufficiency", "id": "3ia-sGkAVf8", "title": "GMAT: Data sufficiency 16", "description": "73-76, pg. 284", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3ia-sGkAVf8.mp4/3ia-sGkAVf8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3ia-sGkAVf8.mp4/3ia-sGkAVf8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3ia-sGkAVf8.m3u8/3ia-sGkAVf8.m3u8"}, "slug": "gmat-data-sufficiency-16", "video_id": "3ia-sGkAVf8", "youtube_id": "3ia-sGkAVf8", "readable_id": "gmat-data-sufficiency-16"}, "AreOMvPCxv8": {"duration": 659, "path": "khan/math/geometry/basic-geometry/heron_formula_tutorial/part-1-of-proof-of-heron-s-formula/", "keywords": "heron's, proof, geometry, area", "id": "AreOMvPCxv8", "title": "Part 1 of proof of Heron's formula", "description": "Part 1 of the proof of Heron's Formula", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AreOMvPCxv8.mp4/AreOMvPCxv8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AreOMvPCxv8.mp4/AreOMvPCxv8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AreOMvPCxv8.m3u8/AreOMvPCxv8.m3u8"}, "slug": "part-1-of-proof-of-heron-s-formula", "video_id": "AreOMvPCxv8", "youtube_id": "AreOMvPCxv8", "readable_id": "part-1-of-proof-of-heron-s-formula"}, "d5lcGCbV5cM": {"duration": 595, "path": "khan/math/algebra/introduction-to-algebra/units-algebra/thinking-about-reasonable-units-to-describe-a-rate/", "keywords": "", "id": "d5lcGCbV5cM", "title": "Thinking about reasonable units to describe a rate", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d5lcGCbV5cM.mp4/d5lcGCbV5cM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d5lcGCbV5cM.mp4/d5lcGCbV5cM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d5lcGCbV5cM.m3u8/d5lcGCbV5cM.m3u8"}, "slug": "thinking-about-reasonable-units-to-describe-a-rate", "video_id": "d5lcGCbV5cM", "youtube_id": "d5lcGCbV5cM", "readable_id": "thinking-about-reasonable-units-to-describe-a-rate"}, "dllD-6loBK4": {"duration": 741, "path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-38/", "keywords": "crash course", "id": "dllD-6loBK4", "title": "World War II", "description": "In which John Green teaches you about World War II, aka The Great Patriotic War, aka The Big One. So how did this war happen? And what does it mean? We've all learned the facts about World War II many times over, thanks to repeated classroom coverage, the History channel, and your grandfather (or maybe great-grandfather) showing you that Nazi bayonet he used to keep in his sock drawer and telling you a bunch of age-inappropriate stories about his harrowing war experiences. So, why did the Axis powers think forceful expansion was a good idea? (they were hungry). So why did this thing shake out in favor of the Allies? HInt: it has to do with the fact that it was a world war. Germany and Japan made some pretty serious strategic errors, such as invading Russia and attacking the United States, and those errors meant that pretty much the whole world was against them. So, find out how this worldwide alliance came together to stop the Axis expansion. All this, plus Canada finally gets the respectful treatment it deserves. Oh, and a warning: there are a few graphic images in this episode. Sensitive viewers may want to use caution, especially around the 9:15 mark.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dllD-6loBK4.mp4/dllD-6loBK4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dllD-6loBK4.mp4/dllD-6loBK4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dllD-6loBK4.m3u8/dllD-6loBK4.m3u8"}, "slug": "crash-course-world-history-38", "video_id": "dllD-6loBK4", "youtube_id": "dllD-6loBK4", "readable_id": "crash-course-world-history-38"}, "fdGNOb3T2_8": {"duration": 75, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p11-harder/", "keywords": "", "id": "fdGNOb3T2_8", "title": "Polynomial factors and graphs \u2014 Harder example", "description": "Watch Sal work through a harder Polynomial factors and graphs problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fdGNOb3T2_8.mp4/fdGNOb3T2_8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fdGNOb3T2_8.mp4/fdGNOb3T2_8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fdGNOb3T2_8.m3u8/fdGNOb3T2_8.m3u8"}, "slug": "sat-math-p11-harder", "video_id": "fdGNOb3T2_8", "youtube_id": "fdGNOb3T2_8", "readable_id": "sat-math-p11-harder"}, "wZJ_iAxvHGU": {"duration": 370, "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/coupling-constant/", "keywords": "", "id": "wZJ_iAxvHGU", "title": "Coupling constant", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wZJ_iAxvHGU.mp4/wZJ_iAxvHGU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wZJ_iAxvHGU.mp4/wZJ_iAxvHGU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wZJ_iAxvHGU.m3u8/wZJ_iAxvHGU.m3u8"}, "slug": "coupling-constant", "video_id": "wZJ_iAxvHGU", "youtube_id": "wZJ_iAxvHGU", "readable_id": "coupling-constant"}, "eE7BR9HCffk": {"duration": 286, "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/caspar-david-friedrich-woman-at-a-window-1822/", "keywords": "Caspar David Friedrich, Friedrich, Woman at a Window, Window, 1822, Alte Nationalgalerie, Berlin, Romanticism, Interior, Genre, Mast, art, painting, art history, Google Art Project, smarthistory, Khan Academy, OER educational", "id": "eE7BR9HCffk", "title": "Friedrich, Woman at a Window", "description": "Caspar David Friedrich, Woman at a Window, 1822, oil on canvas, 44 x 73 cm (Alte Nationalgalerie, Berlin). In the Google Art Project: http://www.googleartproject.com/collection/alte-nationalgalerie/artwork/woman-at-a-window-caspar-david-friedrich/328396/", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eE7BR9HCffk.mp4/eE7BR9HCffk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eE7BR9HCffk.mp4/eE7BR9HCffk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eE7BR9HCffk.m3u8/eE7BR9HCffk.m3u8"}, "slug": "caspar-david-friedrich-woman-at-a-window-1822", "video_id": "eE7BR9HCffk", "youtube_id": "eE7BR9HCffk", "readable_id": "caspar-david-friedrich-woman-at-a-window-1822"}, "1E3Z_R5AHdg": {"duration": 451, "path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/viewing-g-as-the-value-of-earth-s-gravitational-field-near-the-surface/", "keywords": "field, vector, scalar", "id": "1E3Z_R5AHdg", "title": "Viewing g as the value of Earth's gravitational field near the surface", "description": "Viewing g as the value of Earth's gravitational field near the surface rather than the acceleration due to gravity near Earth's surface for an object in freefall", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1E3Z_R5AHdg.mp4/1E3Z_R5AHdg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1E3Z_R5AHdg.mp4/1E3Z_R5AHdg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1E3Z_R5AHdg.m3u8/1E3Z_R5AHdg.m3u8"}, "slug": "viewing-g-as-the-value-of-earth-s-gravitational-field-near-the-surface", "video_id": "1E3Z_R5AHdg", "youtube_id": "1E3Z_R5AHdg", "readable_id": "viewing-g-as-the-value-of-earth-s-gravitational-field-near-the-surface"}, "iorZdz4dsBU": {"duration": 571, "path": "khan/math/pre-algebra/decimals-pre-alg/sig-figs-pre-alg/multiplying-and-dividing-with-significant-figures/", "keywords": "significant, digits", "id": "iorZdz4dsBU", "title": "Multiplying and dividing with significant figures", "description": "Multiplying and dividing with significant figures", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iorZdz4dsBU.mp4/iorZdz4dsBU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iorZdz4dsBU.mp4/iorZdz4dsBU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iorZdz4dsBU.m3u8/iorZdz4dsBU.m3u8"}, "slug": "multiplying-and-dividing-with-significant-figures", "video_id": "iorZdz4dsBU", "youtube_id": "iorZdz4dsBU", "readable_id": "multiplying-and-dividing-with-significant-figures"}, "v8WMx_TmEyQ": {"duration": 558, "path": "khan/humanities/art-islam/islamic-art-late-period/rustem-pasha/", "keywords": "Ottoman Istanbul", "id": "v8WMx_TmEyQ", "title": "Sinan, R\u00fcstem Pasha Mosque", "description": "Mimar Sinan, R\u00fcstem Pasha Mosque, Istanbul, 1561-63.\u00a0Speakers: Dr. Elizabeth Macaulay-Lewis and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v8WMx_TmEyQ.mp4/v8WMx_TmEyQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v8WMx_TmEyQ.mp4/v8WMx_TmEyQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v8WMx_TmEyQ.m3u8/v8WMx_TmEyQ.m3u8"}, "slug": "rustem-pasha", "video_id": "v8WMx_TmEyQ", "youtube_id": "v8WMx_TmEyQ", "readable_id": "rustem-pasha"}, "xwOTlMaerEQ": {"duration": 340, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/percentage-tax-on-hamburgers/", "keywords": "tax, microeconomics, supply, demand", "id": "xwOTlMaerEQ", "title": "Percentage tax on hamburgers", "description": "What would happen if we have a percentage tax instead of a fixed dollar amount", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xwOTlMaerEQ.mp4/xwOTlMaerEQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xwOTlMaerEQ.mp4/xwOTlMaerEQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xwOTlMaerEQ.m3u8/xwOTlMaerEQ.m3u8"}, "slug": "percentage-tax-on-hamburgers", "video_id": "xwOTlMaerEQ", "youtube_id": "xwOTlMaerEQ", "readable_id": "percentage-tax-on-hamburgers"}, "qIQmB5mkUgg": {"duration": 335, "path": "khan/test-prep/mcat/biomolecules/dna/how-dna-is-replicated-1/", "keywords": "", "id": "qIQmB5mkUgg", "title": "How DNA is replicated 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qIQmB5mkUgg.mp4/qIQmB5mkUgg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qIQmB5mkUgg.mp4/qIQmB5mkUgg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qIQmB5mkUgg.m3u8/qIQmB5mkUgg.m3u8"}, "slug": "how-dna-is-replicated-1", "video_id": "qIQmB5mkUgg", "youtube_id": "qIQmB5mkUgg", "readable_id": "how-dna-is-replicated-1"}, "NF0lrkqXIkQ": {"duration": 567, "path": "khan/math/probability/random-variables-topic/binomial_distribution/visualizing-a-binomial-distribution/", "keywords": "", "id": "NF0lrkqXIkQ", "title": "Visualizing a binomial distribution", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NF0lrkqXIkQ.mp4/NF0lrkqXIkQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NF0lrkqXIkQ.mp4/NF0lrkqXIkQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NF0lrkqXIkQ.m3u8/NF0lrkqXIkQ.m3u8"}, "slug": "visualizing-a-binomial-distribution", "video_id": "NF0lrkqXIkQ", "youtube_id": "NF0lrkqXIkQ", "readable_id": "visualizing-a-binomial-distribution"}, "6YYiiixYz9A": {"duration": 101, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-number-mult-div-pre-alg/reciprocal-of-a-mixed-number/", "keywords": "U02_L2_T3_we1, Reciprocal, of, Mixed, Number, CC_5_NF_6, CC_6_NS_1", "id": "6YYiiixYz9A", "title": "Reciprocal of a mixed number", "description": "Reciprocal of a Mixed Number", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6YYiiixYz9A.mp4/6YYiiixYz9A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6YYiiixYz9A.mp4/6YYiiixYz9A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6YYiiixYz9A.m3u8/6YYiiixYz9A.m3u8"}, "slug": "reciprocal-of-a-mixed-number", "video_id": "6YYiiixYz9A", "youtube_id": "6YYiiixYz9A", "readable_id": "reciprocal-of-a-mixed-number"}, "prLfVucoxpw": {"duration": 807, "path": "khan/science/physics/electricity-magnetism/electric-field/proof-advanced-field-from-infinite-plate-part-1/", "keywords": "uniform, constant, electric, field, physics", "id": "prLfVucoxpw", "title": "Proof (advanced): Field from infinite plate (part 1)", "description": "Electric field generated by a uniformly charged, infinite plate", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/prLfVucoxpw.mp4/prLfVucoxpw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/prLfVucoxpw.mp4/prLfVucoxpw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/prLfVucoxpw.m3u8/prLfVucoxpw.m3u8"}, "slug": "proof-advanced-field-from-infinite-plate-part-1", "video_id": "prLfVucoxpw", "youtube_id": "prLfVucoxpw", "readable_id": "proof-advanced-field-from-infinite-plate-part-1"}, "3YMEIjHl9og": {"duration": 261, "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/beginners-guide-high-ren/verrocchio-with-leonardo-baptism-of-christ-1470-75/", "keywords": "Verrocchio, Leonardo, Florence", "id": "3YMEIjHl9og", "title": "Toward the high Renaissance: Verrocchio and Leonardo", "description": "Verrocchio (with Leonardo), Baptism of Christ, 1470-75 Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3YMEIjHl9og.mp4/3YMEIjHl9og.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3YMEIjHl9og.mp4/3YMEIjHl9og.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3YMEIjHl9og.m3u8/3YMEIjHl9og.m3u8"}, "slug": "verrocchio-with-leonardo-baptism-of-christ-1470-75", "video_id": "3YMEIjHl9og", "youtube_id": "3YMEIjHl9og", "readable_id": "verrocchio-with-leonardo-baptism-of-christ-1470-75"}, "ob5U8zPbAX4": {"duration": 373, "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/anatomy-of-a-neuron/", "keywords": "neuron, anatomy, dendrite, axon, myelin, schwann", "id": "ob5U8zPbAX4", "title": "Anatomy of a neuron", "description": "Introduction to the neuron and its anatomy", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ob5U8zPbAX4.mp4/ob5U8zPbAX4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ob5U8zPbAX4.mp4/ob5U8zPbAX4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ob5U8zPbAX4.m3u8/ob5U8zPbAX4.m3u8"}, "slug": "anatomy-of-a-neuron", "video_id": "ob5U8zPbAX4", "youtube_id": "ob5U8zPbAX4", "readable_id": "anatomy-of-a-neuron"}, "tJBQZ3PUkPo": {"duration": 100, "path": "khan/math/algebra/algebra-functions/function-inputs-and-outputs/finding-input-given-function-output-formula/", "keywords": "", "id": "tJBQZ3PUkPo", "title": "How to match function input to output given the formula (example)", "description": "Sal finds the input value for which f(t)=13, given that f(t)=-2t+5.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tJBQZ3PUkPo.mp4/tJBQZ3PUkPo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tJBQZ3PUkPo.mp4/tJBQZ3PUkPo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tJBQZ3PUkPo.m3u8/tJBQZ3PUkPo.m3u8"}, "slug": "finding-input-given-function-output-formula", "video_id": "tJBQZ3PUkPo", "youtube_id": "tJBQZ3PUkPo", "readable_id": "finding-input-given-function-output-formula"}, "IMf5BbjpT1I": {"duration": 61, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-9-4/", "keywords": "", "id": "IMf5BbjpT1I", "title": "4 Weekly cookie inventory", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IMf5BbjpT1I.mp4/IMf5BbjpT1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IMf5BbjpT1I.mp4/IMf5BbjpT1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IMf5BbjpT1I.m3u8/IMf5BbjpT1I.m3u8"}, "slug": "sat-2010-may-9-4", "video_id": "IMf5BbjpT1I", "youtube_id": "IMf5BbjpT1I", "readable_id": "sat-2010-may-9-4"}, "kiaU0jX-kk0": {"duration": 472, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/steric-hindrance-1/", "keywords": "", "id": "kiaU0jX-kk0", "title": "Steric hindrance", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kiaU0jX-kk0.mp4/kiaU0jX-kk0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kiaU0jX-kk0.mp4/kiaU0jX-kk0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kiaU0jX-kk0.m3u8/kiaU0jX-kk0.m3u8"}, "slug": "steric-hindrance-1", "video_id": "kiaU0jX-kk0", "youtube_id": "kiaU0jX-kk0", "readable_id": "steric-hindrance-1"}, "oPTRwYdOEAM": {"duration": 183, "path": "khan/partner-content/pixar/rendering/rendering-2/rendering-6/", "keywords": "", "id": "oPTRwYdOEAM", "title": "2. Parametric form of a ray", "description": "This video introduces the parametric form of a ray in 2D.\nClick here to review weighted averages of 2 points.\nClick here to review slope-intercept form of a line.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oPTRwYdOEAM.mp4/oPTRwYdOEAM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oPTRwYdOEAM.mp4/oPTRwYdOEAM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oPTRwYdOEAM.m3u8/oPTRwYdOEAM.m3u8"}, "slug": "rendering-6", "video_id": "oPTRwYdOEAM", "youtube_id": "oPTRwYdOEAM", "readable_id": "rendering-6"}, "E9Q_Lc0g1xE": {"duration": 885, "path": "khan/math/multivariable-calculus/line_integrals_topic/position_vector_functions/derivative-of-a-position-vector-valued-function/", "keywords": "derivative, vector, valued, function", "id": "E9Q_Lc0g1xE", "title": "Derivative of a position vector valued function", "description": "Visualizing the derivative of a position vector valued function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E9Q_Lc0g1xE.mp4/E9Q_Lc0g1xE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E9Q_Lc0g1xE.mp4/E9Q_Lc0g1xE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E9Q_Lc0g1xE.m3u8/E9Q_Lc0g1xE.m3u8"}, "slug": "derivative-of-a-position-vector-valued-function", "video_id": "E9Q_Lc0g1xE", "youtube_id": "E9Q_Lc0g1xE", "readable_id": "derivative-of-a-position-vector-valued-function"}, "hBES75bsh64": {"duration": 220, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/danny-oneill/kauffman-danny-oneill2/", "keywords": "", "id": "hBES75bsh64", "title": "Danny O'Neill - Getting started", "description": "Danny O\u2019Neill, President of The Roasterie, describes the early days of his business, including how he fit a coffee roaster in his basement. Danny also tells the story of his first sale and how he figured out his early financials.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hBES75bsh64.mp4/hBES75bsh64.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hBES75bsh64.mp4/hBES75bsh64.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hBES75bsh64.m3u8/hBES75bsh64.m3u8"}, "slug": "kauffman-danny-oneill2", "video_id": "hBES75bsh64", "youtube_id": "hBES75bsh64", "readable_id": "kauffman-danny-oneill2"}, "9zY5dhi6IZY": {"duration": 378, "path": "khan/test-prep/mcat/processing-the-environment/stress/behavioral-effects-of-stress/", "keywords": "mcat", "id": "9zY5dhi6IZY", "title": "Behavioral effects of stress", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9zY5dhi6IZY.mp4/9zY5dhi6IZY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9zY5dhi6IZY.mp4/9zY5dhi6IZY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9zY5dhi6IZY.m3u8/9zY5dhi6IZY.m3u8"}, "slug": "behavioral-effects-of-stress", "video_id": "9zY5dhi6IZY", "youtube_id": "9zY5dhi6IZY", "readable_id": "behavioral-effects-of-stress"}, "3n8UjH9h_8I": {"duration": 534, "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/what-is-parkinsons-disease/", "keywords": "", "id": "3n8UjH9h_8I", "title": "What is Parkinson's disease?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3n8UjH9h_8I.mp4/3n8UjH9h_8I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3n8UjH9h_8I.mp4/3n8UjH9h_8I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3n8UjH9h_8I.m3u8/3n8UjH9h_8I.m3u8"}, "slug": "what-is-parkinsons-disease", "video_id": "3n8UjH9h_8I", "youtube_id": "3n8UjH9h_8I", "readable_id": "what-is-parkinsons-disease"}, "MaMk6-f3T9k": {"duration": 305, "path": "khan/math/pre-algebra/rates-and-ratios/ratios_and_proportions/solving-ratio-problems-with-tables-exercise/", "keywords": "", "id": "MaMk6-f3T9k", "title": "Solving ratio problems with tables example 1", "description": "We're displaying ratios in a table format here, and then asking: given a ratio, solve for equivalent ratios. Here are a few examples to practice on.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MaMk6-f3T9k.mp4/MaMk6-f3T9k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MaMk6-f3T9k.mp4/MaMk6-f3T9k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MaMk6-f3T9k.m3u8/MaMk6-f3T9k.m3u8"}, "slug": "solving-ratio-problems-with-tables-exercise", "video_id": "MaMk6-f3T9k", "youtube_id": "MaMk6-f3T9k", "readable_id": "solving-ratio-problems-with-tables-exercise"}, "-eAzhBZgq28": {"duration": 1133, "path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/linear-algebra-introduction-to-the-inverse-of-a-function/", "keywords": "Linear, algebra, function, inverse", "id": "-eAzhBZgq28", "title": "Introduction to the inverse of a function", "description": "Introduction to the inverse of a function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-eAzhBZgq28.mp4/-eAzhBZgq28.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-eAzhBZgq28.mp4/-eAzhBZgq28.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-eAzhBZgq28.m3u8/-eAzhBZgq28.m3u8"}, "slug": "linear-algebra-introduction-to-the-inverse-of-a-function", "video_id": "-eAzhBZgq28", "youtube_id": "-eAzhBZgq28", "readable_id": "linear-algebra-introduction-to-the-inverse-of-a-function"}, "TPM1LuW3Y5w": {"duration": 166, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/nike-winged-victory-of-samothrace-c-190-b-c-e/", "keywords": "Nike of Samothrace, Louvre, Art History, Paris", "id": "TPM1LuW3Y5w", "title": "Winged Victory (Nike) of Samothrace", "description": "Nike (Winged Victory) of Samothrace, Lartos marble (ship) and Parian marble (figure), c. 190 B.C.E. 3.28m high, Hellenistic Period (Mus\u00e9e du Louvre, Paris). The sculpture was unearthed in 1863 after its discovery under the direction of Charles Champoiseau\u200b, the French Vice-Consul to Turkey. Please note that the theoretical reconstruction of the Nike as a trumpeter mentioned in the video has been largely abandoned; the monument is now thought to have been part of a fountain possibly commemorating a naval victory. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TPM1LuW3Y5w.mp4/TPM1LuW3Y5w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TPM1LuW3Y5w.mp4/TPM1LuW3Y5w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TPM1LuW3Y5w.m3u8/TPM1LuW3Y5w.m3u8"}, "slug": "nike-winged-victory-of-samothrace-c-190-b-c-e", "video_id": "TPM1LuW3Y5w", "youtube_id": "TPM1LuW3Y5w", "readable_id": "nike-winged-victory-of-samothrace-c-190-b-c-e"}, "Cn0skMJ2F3c": {"duration": 384, "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/simulation-showing-bias-in-sample-variance/", "keywords": "sample variance biased unbiased", "id": "Cn0skMJ2F3c", "title": "Simulation showing bias in sample variance", "description": "Simulation by Peter Collingridge giving us a better understanding of why we divide by (n-1) when calculating the unbiased sample variance. Simulation available at: http://www.khanacademy.org/cs/challenge-unbiased-estimate-of-population-variance/1169428428", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Cn0skMJ2F3c.mp4/Cn0skMJ2F3c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Cn0skMJ2F3c.mp4/Cn0skMJ2F3c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Cn0skMJ2F3c.m3u8/Cn0skMJ2F3c.m3u8"}, "slug": "simulation-showing-bias-in-sample-variance", "video_id": "Cn0skMJ2F3c", "youtube_id": "Cn0skMJ2F3c", "readable_id": "simulation-showing-bias-in-sample-variance"}, "p5e5mf_G3FI": {"duration": 184, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/equations_beginner/solving-equations-1/", "keywords": "U02_L1_T1_we1:, Solving, Equations, CC_8_EE_7, CC_39336_A-REI_1, CC_39336_A-REI_3", "id": "p5e5mf_G3FI", "title": "Example: two-step equation with numerator x", "description": "Solve the equation by isolating the term with numerator x.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p5e5mf_G3FI.mp4/p5e5mf_G3FI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p5e5mf_G3FI.mp4/p5e5mf_G3FI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p5e5mf_G3FI.m3u8/p5e5mf_G3FI.m3u8"}, "slug": "solving-equations-1", "video_id": "p5e5mf_G3FI", "youtube_id": "p5e5mf_G3FI", "readable_id": "solving-equations-1"}, "pyEVmWLOePw": {"duration": 784, "path": "khan/test-prep/mcat/cells/cytoskeleton/microfilaments-and-intermediate-filaments-2/", "keywords": "", "id": "pyEVmWLOePw", "title": "Microfilaments and intermediate filaments", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pyEVmWLOePw.mp4/pyEVmWLOePw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pyEVmWLOePw.mp4/pyEVmWLOePw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pyEVmWLOePw.m3u8/pyEVmWLOePw.m3u8"}, "slug": "microfilaments-and-intermediate-filaments-2", "video_id": "pyEVmWLOePw", "youtube_id": "pyEVmWLOePw", "readable_id": "microfilaments-and-intermediate-filaments-2"}, "lJX8DxoPRfk": {"duration": 853, "path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/pi-bonds-and-sp2-hybridized-orbitals/", "keywords": "Pi, bonds, and, sp2, Hybridized, Orbitals", "id": "lJX8DxoPRfk", "title": "Pi bonds and sp2 hybridized orbitals", "description": "Pi bonds and sp2 Hybridized Orbitals", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lJX8DxoPRfk.mp4/lJX8DxoPRfk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lJX8DxoPRfk.mp4/lJX8DxoPRfk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lJX8DxoPRfk.m3u8/lJX8DxoPRfk.m3u8"}, "slug": "pi-bonds-and-sp2-hybridized-orbitals", "video_id": "lJX8DxoPRfk", "youtube_id": "lJX8DxoPRfk", "readable_id": "pi-bonds-and-sp2-hybridized-orbitals"}, "y_sR3OyZUGo": {"duration": 351, "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/chemical-shift/", "keywords": "", "id": "y_sR3OyZUGo", "title": "Chemical shift", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y_sR3OyZUGo.mp4/y_sR3OyZUGo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y_sR3OyZUGo.mp4/y_sR3OyZUGo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y_sR3OyZUGo.m3u8/y_sR3OyZUGo.m3u8"}, "slug": "chemical-shift", "video_id": "y_sR3OyZUGo", "youtube_id": "y_sR3OyZUGo", "readable_id": "chemical-shift"}, "lmhiibdwznQ": {"duration": 282, "path": "khan/partner-content/wi-phi/value-theory-1/god-morality-part-1/", "keywords": "", "id": "lmhiibdwznQ", "title": "Ethics: God and Morality, Part 1", "description": "Part 1 of a pair. Stephen considers the relationship between morality and God. Specifically, he asks: is morality the same thing as the commands of God? Is there no morality if there is no God? Ultimately, Stephen will argue that morality and God's commands are distinct, even if there is a God and she commands moral things. However, in this first video, Steve considers why you might like the view that morality just is God's commands.\n\nSpeaker: Dr. Stephen Darwall, Andrew Downey Orrick Professor of Philosophy, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lmhiibdwznQ.mp4/lmhiibdwznQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lmhiibdwznQ.mp4/lmhiibdwznQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lmhiibdwznQ.m3u8/lmhiibdwznQ.m3u8"}, "slug": "god-morality-part-1", "video_id": "lmhiibdwznQ", "youtube_id": "lmhiibdwznQ", "readable_id": "god-morality-part-1"}, "uC09taczvOo": {"duration": 118, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-numbers-pre-alg/points-on-a-number-line/", "keywords": "U09_L1_T3_we2, Points, on, number, line, CC_2_MD_6, CC_3_NF_2, CC_3_NF_3_c, CC_4_NF_6, CC_6_NS_6, CC_6_NS_6_c, CC_6_NS_7_a", "id": "uC09taczvOo", "title": "Decimals and fractions on a number line", "description": "We're mixing it up by placing both fractions and decimals on the same number line. Great practice because you need to move effortlessly between the two.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uC09taczvOo.mp4/uC09taczvOo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uC09taczvOo.mp4/uC09taczvOo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uC09taczvOo.m3u8/uC09taczvOo.m3u8"}, "slug": "points-on-a-number-line", "video_id": "uC09taczvOo", "youtube_id": "uC09taczvOo", "readable_id": "points-on-a-number-line"}, "xSc4oLA9e8o": {"duration": 360, "path": "khan/math/precalculus/prob_comb/independent_events_precalc/compound-probability-of-independent-events/", "keywords": "probability, statistics, coin, fair", "id": "xSc4oLA9e8o", "title": "Compound probability of independent events", "description": "You'll become familiar with the concept of independent events, or that one event in no way affects what happens in the second event. Keep in mind, too, that the sum of the probabilities of all the possible events should equal 1.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xSc4oLA9e8o.mp4/xSc4oLA9e8o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xSc4oLA9e8o.mp4/xSc4oLA9e8o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xSc4oLA9e8o.m3u8/xSc4oLA9e8o.m3u8"}, "slug": "compound-probability-of-independent-events", "video_id": "xSc4oLA9e8o", "youtube_id": "xSc4oLA9e8o", "readable_id": "compound-probability-of-independent-events"}, "JiE_kNk3ucI": {"duration": 650, "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/intergalactic-scale/", "keywords": "Intergalactic, Scale, Cosmology, Astronomy, Observable, Universe", "id": "JiE_kNk3ucI", "title": "Intergalactic scale", "description": "Intergalactic Scale", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JiE_kNk3ucI.mp4/JiE_kNk3ucI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JiE_kNk3ucI.mp4/JiE_kNk3ucI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JiE_kNk3ucI.m3u8/JiE_kNk3ucI.m3u8"}, "slug": "intergalactic-scale", "video_id": "JiE_kNk3ucI", "youtube_id": "JiE_kNk3ucI", "readable_id": "intergalactic-scale"}, "sGYBfCVfl44": {"duration": 76, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2009-may-3-2/", "keywords": "", "id": "sGYBfCVfl44", "title": "2 Solving for angle", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sGYBfCVfl44.mp4/sGYBfCVfl44.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sGYBfCVfl44.mp4/sGYBfCVfl44.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sGYBfCVfl44.m3u8/sGYBfCVfl44.m3u8"}, "slug": "sat-2009-may-3-2", "video_id": "sGYBfCVfl44", "youtube_id": "sGYBfCVfl44", "readable_id": "sat-2009-may-3-2"}, "ECdR_W3Fk4Q": {"duration": 119, "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/pollock-paint/", "keywords": "", "id": "ECdR_W3Fk4Q", "title": "Paint Application Studies of Jackson Pollock's Mural", "description": "Scientists from the Getty Conservation Institute attempt to recreate the method and materials used by Jackson Pollock to create his monumental painting, Mural.\u00a0Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ECdR_W3Fk4Q.mp4/ECdR_W3Fk4Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ECdR_W3Fk4Q.mp4/ECdR_W3Fk4Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ECdR_W3Fk4Q.m3u8/ECdR_W3Fk4Q.m3u8"}, "slug": "pollock-paint", "video_id": "ECdR_W3Fk4Q", "youtube_id": "ECdR_W3Fk4Q", "readable_id": "pollock-paint"}, "xw6utjoyMi4": {"duration": 1012, "path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/conditional-probability-and-combinations/", "keywords": "conditional, probability, combinations", "id": "xw6utjoyMi4", "title": "Conditional probability and combinations", "description": "Probability that I picked a fair coin given that I flipped 4 out of 6 heads.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xw6utjoyMi4.mp4/xw6utjoyMi4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xw6utjoyMi4.mp4/xw6utjoyMi4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xw6utjoyMi4.m3u8/xw6utjoyMi4.m3u8"}, "slug": "conditional-probability-and-combinations", "video_id": "xw6utjoyMi4", "youtube_id": "xw6utjoyMi4", "readable_id": "conditional-probability-and-combinations"}, "GH56wMh3FZg": {"duration": 125, "path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-june-7-2013-rover-ready-to-switch-gears/", "keywords": "", "id": "GH56wMh3FZg", "title": "Rover ready to switch gears", "description": "NASA's Curiosity rover switches to long-distance driving mode as she heads to Mount Sharp.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GH56wMh3FZg.mp4/GH56wMh3FZg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GH56wMh3FZg.mp4/GH56wMh3FZg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GH56wMh3FZg.m3u8/GH56wMh3FZg.m3u8"}, "slug": "curiosity-rover-report-june-7-2013-rover-ready-to-switch-gears", "video_id": "GH56wMh3FZg", "youtube_id": "GH56wMh3FZg", "readable_id": "curiosity-rover-report-june-7-2013-rover-ready-to-switch-gears"}, "7nKXXKn6jL8": {"duration": 605, "path": "khan/humanities/history/american-civics/american-civics/fafsa_intro/", "keywords": "", "id": "7nKXXKn6jL8", "title": "Introduction to the FAFSA", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7nKXXKn6jL8.mp4/7nKXXKn6jL8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7nKXXKn6jL8.mp4/7nKXXKn6jL8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7nKXXKn6jL8.m3u8/7nKXXKn6jL8.m3u8"}, "slug": "fafsa_intro", "video_id": "7nKXXKn6jL8", "youtube_id": "7nKXXKn6jL8", "readable_id": "fafsa_intro"}, "IZ8W-h764Cc": {"duration": 606, "path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-7/", "keywords": "volume, of, revolution, rotation, calculus", "id": "IZ8W-h764Cc", "title": "Shell method around a non-axis line", "description": "Taking the revolution around something other than one of the axes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IZ8W-h764Cc.mp4/IZ8W-h764Cc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IZ8W-h764Cc.mp4/IZ8W-h764Cc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IZ8W-h764Cc.m3u8/IZ8W-h764Cc.m3u8"}, "slug": "solid-of-revolution-part-7", "video_id": "IZ8W-h764Cc", "youtube_id": "IZ8W-h764Cc", "readable_id": "solid-of-revolution-part-7"}, "NM8qTo361ic": {"duration": 195, "path": "khan/math/algebra-basics/core-algebra-foundations/algebra-foundations-decimal-operations/converting-fractions-to-decimals-ex1/", "keywords": "Converting, fractions, to, decimals, ex1", "id": "NM8qTo361ic", "title": "Fraction to decimal with rounding", "description": "Sometimes when you convert a fraction to a decimal you have to do some long division and rounding.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NM8qTo361ic.mp4/NM8qTo361ic.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NM8qTo361ic.mp4/NM8qTo361ic.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NM8qTo361ic.m3u8/NM8qTo361ic.m3u8"}, "slug": "converting-fractions-to-decimals-ex1", "video_id": "NM8qTo361ic", "youtube_id": "NM8qTo361ic", "readable_id": "converting-fractions-to-decimals-ex1"}, "3_DxJwDTbyQ": {"duration": 425, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation/recognizing-direct-and-inverse-variation/", "keywords": "direct, inverse, variation", "id": "3_DxJwDTbyQ", "title": "How to determine whether an equation represents direct or inverse variation (example)", "description": "Sal gives many examples of two-variable equations where the variables vary directly, inversely, or neither.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3_DxJwDTbyQ.mp4/3_DxJwDTbyQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3_DxJwDTbyQ.mp4/3_DxJwDTbyQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3_DxJwDTbyQ.m3u8/3_DxJwDTbyQ.m3u8"}, "slug": "recognizing-direct-and-inverse-variation", "video_id": "3_DxJwDTbyQ", "youtube_id": "3_DxJwDTbyQ", "readable_id": "recognizing-direct-and-inverse-variation"}, "6HMYQfI76fQ": {"duration": 45, "path": "khan/humanities/art-asia/southeast-asia/bali/balinese-masks/", "keywords": "", "id": "6HMYQfI76fQ", "title": "Repairing sacred Balinese masks", "description": "Barong masks are often sold as souvenirs, but true ritual Barong are created using a particular type of wood with special ceremonies marking key points in the process. In this video, scholar I Wayan Dibia is at the home of mask carver I Wayan Tanguhh and describes the process of repairing a Barong mask. The Barong is a protective deity that can take on a variety of animal forms--lions, tigers, and boars are some of the more common images\u2014and each one is addressed using a respectful title such as Great God or Great Lord. Many villages, especially in southern Bali, have their own Barong figure. The Barong mask is kept in a shrine within a temple and brought out for use.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6HMYQfI76fQ.mp4/6HMYQfI76fQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6HMYQfI76fQ.mp4/6HMYQfI76fQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6HMYQfI76fQ.m3u8/6HMYQfI76fQ.m3u8"}, "slug": "balinese-masks", "video_id": "6HMYQfI76fQ", "youtube_id": "6HMYQfI76fQ", "readable_id": "balinese-masks"}, "nu13yQDo4Go": {"duration": 155, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-19/", "keywords": "", "id": "nu13yQDo4Go", "title": "19 Exponent properties to factor expression", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nu13yQDo4Go.mp4/nu13yQDo4Go.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nu13yQDo4Go.mp4/nu13yQDo4Go.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nu13yQDo4Go.m3u8/nu13yQDo4Go.m3u8"}, "slug": "sat-getting-ready-2-19", "video_id": "nu13yQDo4Go", "youtube_id": "nu13yQDo4Go", "readable_id": "sat-getting-ready-2-19"}, "UjIPMJd6Xks": {"duration": 298, "path": "khan/computing/computer-science/cryptography/modern-crypt/rsa-encryption-part-4/", "keywords": "rsa encryption", "id": "UjIPMJd6Xks", "title": "RSA encryption: Step 4", "description": "RSA worked example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UjIPMJd6Xks.mp4/UjIPMJd6Xks.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UjIPMJd6Xks.mp4/UjIPMJd6Xks.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UjIPMJd6Xks.m3u8/UjIPMJd6Xks.m3u8"}, "slug": "rsa-encryption-part-4", "video_id": "UjIPMJd6Xks", "youtube_id": "UjIPMJd6Xks", "readable_id": "rsa-encryption-part-4"}, "NcADzGz3bSI": {"duration": 607, "path": "khan/math/arithmetic/multiplication-division/long_division/division-3-more-long-division-and-remainder-examples/", "keywords": "long, division, remainder, CC_3_OA_2, CC_3_OA_6, CC_3_OA_7, CC_4_NBT_6, CC_4_OA_3", "id": "NcADzGz3bSI", "title": "Dividing numbers: long division with remainders", "description": "Here we go with more long division practice. Ever wonder why we call it \"long\" division? What's \"long\" about it, anyway?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NcADzGz3bSI.mp4/NcADzGz3bSI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NcADzGz3bSI.mp4/NcADzGz3bSI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NcADzGz3bSI.m3u8/NcADzGz3bSI.m3u8"}, "slug": "division-3-more-long-division-and-remainder-examples", "video_id": "NcADzGz3bSI", "youtube_id": "NcADzGz3bSI", "readable_id": "division-3-more-long-division-and-remainder-examples"}, "xrAalIDOBoY": {"duration": 103, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2010-may-9-1/", "keywords": "", "id": "xrAalIDOBoY", "title": "16 Writing compound inequality", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xrAalIDOBoY.mp4/xrAalIDOBoY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xrAalIDOBoY.mp4/xrAalIDOBoY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xrAalIDOBoY.m3u8/xrAalIDOBoY.m3u8"}, "slug": "sat-2010-may-9-1", "video_id": "xrAalIDOBoY", "youtube_id": "xrAalIDOBoY", "readable_id": "sat-2010-may-9-1"}, "tS2YJPmKOFQ": {"duration": 889, "path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/ph-poh-of-strong-acids-and-bases/", "keywords": "chemistry, ph", "id": "tS2YJPmKOFQ", "title": "pH, pOH of strong acids and bases", "description": "Deriving the relationship between pKw, pH, and pOH. Calculating the pH or pOH of strong acids and bases.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tS2YJPmKOFQ.mp4/tS2YJPmKOFQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tS2YJPmKOFQ.mp4/tS2YJPmKOFQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tS2YJPmKOFQ.m3u8/tS2YJPmKOFQ.m3u8"}, "slug": "ph-poh-of-strong-acids-and-bases", "video_id": "tS2YJPmKOFQ", "youtube_id": "tS2YJPmKOFQ", "readable_id": "ph-poh-of-strong-acids-and-bases"}, "UJQkqV2zGv0": {"duration": 576, "path": "khan/math/algebra/algebra-functions/domain-and-range/introduction-to-interval-notation/", "keywords": "", "id": "UJQkqV2zGv0", "title": "Intervals and interval notation", "description": "Intervals describe specific sets of numbers and are very useful when discussing domain and range. In this video, Sal introduces the different types of intervals and their notations.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UJQkqV2zGv0.mp4/UJQkqV2zGv0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UJQkqV2zGv0.mp4/UJQkqV2zGv0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UJQkqV2zGv0.m3u8/UJQkqV2zGv0.m3u8"}, "slug": "introduction-to-interval-notation", "video_id": "UJQkqV2zGv0", "youtube_id": "UJQkqV2zGv0", "readable_id": "introduction-to-interval-notation"}, "4WIiConeatM": {"duration": 347, "path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-structure-of-society-race-and-ethnicity/", "keywords": "", "id": "4WIiConeatM", "title": "Demographic structure of society - race and ethnicity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4WIiConeatM.mp4/4WIiConeatM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4WIiConeatM.mp4/4WIiConeatM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4WIiConeatM.m3u8/4WIiConeatM.m3u8"}, "slug": "demographic-structure-of-society-race-and-ethnicity", "video_id": "4WIiConeatM", "youtube_id": "4WIiConeatM", "readable_id": "demographic-structure-of-society-race-and-ethnicity"}, "_WAi2fwUqN4": {"duration": 202, "path": "khan/humanities/art-asia/art-japan/japanese-art/zen-buddhism/", "keywords": "", "id": "_WAi2fwUqN4", "title": "Zen Buddhism", "description": "An introduction to Zen, a form of Buddhism that emphasizes seeking one's own Buddha nature through meditation.\u00a0 Learn more about Buddhism in Japan on the education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_WAi2fwUqN4.mp4/_WAi2fwUqN4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_WAi2fwUqN4.mp4/_WAi2fwUqN4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_WAi2fwUqN4.m3u8/_WAi2fwUqN4.m3u8"}, "slug": "zen-buddhism", "video_id": "_WAi2fwUqN4", "youtube_id": "_WAi2fwUqN4", "readable_id": "zen-buddhism"}, "u7dhn-hBHzQ": {"duration": 578, "path": "khan/math/differential-calculus/derivative_applications/local-linearization/local-linearization-intro/", "keywords": "", "id": "u7dhn-hBHzQ", "title": "Local linearization", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u7dhn-hBHzQ.mp4/u7dhn-hBHzQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u7dhn-hBHzQ.mp4/u7dhn-hBHzQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u7dhn-hBHzQ.m3u8/u7dhn-hBHzQ.m3u8"}, "slug": "local-linearization-intro", "video_id": "u7dhn-hBHzQ", "youtube_id": "u7dhn-hBHzQ", "readable_id": "local-linearization-intro"}, "fPc20_vtlaM": {"duration": 303, "path": "khan/test-prep/ap-art-history/south-east-se-asia/cambodia-art/angkor-temple-mountains/", "keywords": "", "id": "fPc20_vtlaM", "title": "Angkor temple mountains", "description": "This video explores the ancient kingdom of Angkor , which was one of the most powerful states in Southeast Asia from the 800s to the 1300s. A succession of kings built huge temples that remain in Cambodia today as some of the world's greatest religious monuments. Learn more about artworks from Southeast Asia on education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fPc20_vtlaM.mp4/fPc20_vtlaM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fPc20_vtlaM.mp4/fPc20_vtlaM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fPc20_vtlaM.m3u8/fPc20_vtlaM.m3u8"}, "slug": "angkor-temple-mountains", "video_id": "fPc20_vtlaM", "youtube_id": "fPc20_vtlaM", "readable_id": "angkor-temple-mountains"}, "l4265qSL914": {"duration": 169, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h4-harder/", "keywords": "", "id": "l4265qSL914", "title": "Systems of linear inequalities word problems \u2014 Harder example", "description": "Watch Sal work through a harder Systems of linear inequalities word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/l4265qSL914.mp4/l4265qSL914.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/l4265qSL914.mp4/l4265qSL914.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/l4265qSL914.m3u8/l4265qSL914.m3u8"}, "slug": "sat-math-h4-harder", "video_id": "l4265qSL914", "youtube_id": "l4265qSL914", "readable_id": "sat-math-h4-harder"}, "IW4Reburjpc": {"duration": 1139, "path": "khan/math/differential-equations/laplace-transform/convolution-integral/introduction-to-the-convolution/", "keywords": "convolution", "id": "IW4Reburjpc", "title": "Introduction to the convolution", "description": "Introduction to the Convolution", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IW4Reburjpc.mp4/IW4Reburjpc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IW4Reburjpc.mp4/IW4Reburjpc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IW4Reburjpc.m3u8/IW4Reburjpc.m3u8"}, "slug": "introduction-to-the-convolution", "video_id": "IW4Reburjpc", "youtube_id": "IW4Reburjpc", "readable_id": "introduction-to-the-convolution"}, "pPsqUFuysbU": {"duration": 266, "path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/turner-rain-steam-and-speed-the-great-western-railway-1844/", "keywords": "J. M. W. Turner, Raine, Steam and Speed, Trains, National Gallery, London, Smarthistory, Art History", "id": "pPsqUFuysbU", "title": "Turner, Rain, steam, and speed \u2013 the great western railway", "description": "Joseph Mallord William Turner, Rain, Steam, and Speed -- The Great Western Railway, oil on canvas, 1844 (National Gallery, London) Speakers: Dr. Beth Harris, Dr. Steven Zucker\n\nRain, Steam, and Speed -- The Great Western Railway was exhibited at the Royal Academy in 1844. It depicts the Maidenhead Railway Bridge (completed (1838) looking east, across the River Thames\u200b between Taplow and Maidenhead.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pPsqUFuysbU.mp4/pPsqUFuysbU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pPsqUFuysbU.mp4/pPsqUFuysbU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pPsqUFuysbU.m3u8/pPsqUFuysbU.m3u8"}, "slug": "turner-rain-steam-and-speed-the-great-western-railway-1844", "video_id": "pPsqUFuysbU", "youtube_id": "pPsqUFuysbU", "readable_id": "turner-rain-steam-and-speed-the-great-western-railway-1844"}, "Y1PXVSDn9HU": {"duration": 378, "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-preparing-students/sscc-blended-preparing/", "keywords": "", "id": "Y1PXVSDn9HU", "title": "How to prepare students to thrive in a blended learning environment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y1PXVSDn9HU.mp4/Y1PXVSDn9HU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y1PXVSDn9HU.mp4/Y1PXVSDn9HU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y1PXVSDn9HU.m3u8/Y1PXVSDn9HU.m3u8"}, "slug": "sscc-blended-preparing", "video_id": "Y1PXVSDn9HU", "youtube_id": "Y1PXVSDn9HU", "readable_id": "sscc-blended-preparing"}, "zbQFQ_nzbhI": {"duration": 578, "path": "khan/humanities/history/euro-hist/ww1-aftermath/arabia-after-world-war-i/", "keywords": "", "id": "zbQFQ_nzbhI", "title": "Arabia after World War I", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zbQFQ_nzbhI.mp4/zbQFQ_nzbhI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zbQFQ_nzbhI.mp4/zbQFQ_nzbhI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zbQFQ_nzbhI.m3u8/zbQFQ_nzbhI.m3u8"}, "slug": "arabia-after-world-war-i", "video_id": "zbQFQ_nzbhI", "youtube_id": "zbQFQ_nzbhI", "readable_id": "arabia-after-world-war-i"}, "Zp5z0wa0kgo": {"duration": 244, "path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-example-2/", "keywords": "", "id": "Zp5z0wa0kgo", "title": "u-substitution example 2", "description": "Another example of using u-subsitution", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zp5z0wa0kgo.mp4/Zp5z0wa0kgo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zp5z0wa0kgo.mp4/Zp5z0wa0kgo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zp5z0wa0kgo.m3u8/Zp5z0wa0kgo.m3u8"}, "slug": "u-substitution-example-2", "video_id": "Zp5z0wa0kgo", "youtube_id": "Zp5z0wa0kgo", "readable_id": "u-substitution-example-2"}, "w3IKEa_GOYs": {"duration": 424, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/star-field-and-nebula-images/", "keywords": "Star, Field, and, Nebula, Images", "id": "w3IKEa_GOYs", "title": "Star field and nebula images", "description": "Star Field and Nebula Images", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w3IKEa_GOYs.mp4/w3IKEa_GOYs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w3IKEa_GOYs.mp4/w3IKEa_GOYs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w3IKEa_GOYs.m3u8/w3IKEa_GOYs.m3u8"}, "slug": "star-field-and-nebula-images", "video_id": "w3IKEa_GOYs", "youtube_id": "w3IKEa_GOYs", "readable_id": "star-field-and-nebula-images"}, "7ynX_F-SwNY": {"duration": 1018, "path": "khan/science/biology/cellular-molecular-biology/photosynthesis/c-4-photosynthesis/", "keywords": "c-4, photosythesis, photorespiration", "id": "7ynX_F-SwNY", "title": "C-4 photosynthesis", "description": "C-4 Photosynthesis: How some plants avoid photorespiration", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7ynX_F-SwNY.mp4/7ynX_F-SwNY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7ynX_F-SwNY.mp4/7ynX_F-SwNY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7ynX_F-SwNY.m3u8/7ynX_F-SwNY.m3u8"}, "slug": "c-4-photosynthesis", "video_id": "7ynX_F-SwNY", "youtube_id": "7ynX_F-SwNY", "readable_id": "c-4-photosynthesis"}, "vAtQB9wLkUA": {"duration": 545, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/part-3-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220/", "keywords": "", "id": "vAtQB9wLkUA", "title": "Cathedral of Notre Dame de Chartres (part 3)", "description": "Part 3: Cathedral of Notre Dame de Chartres, c.1145 and 1194-c.1220\n\nThis video (3 of 3), focuses on the symbolism of light, the cathedral's flying buttresses, transept, the iconography of the north rose window, and the north porch and its sculptural program\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nFor more: http://smarthistory.org/Gothic.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vAtQB9wLkUA.mp4/vAtQB9wLkUA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vAtQB9wLkUA.mp4/vAtQB9wLkUA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vAtQB9wLkUA.m3u8/vAtQB9wLkUA.m3u8"}, "slug": "part-3-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220", "video_id": "vAtQB9wLkUA", "youtube_id": "vAtQB9wLkUA", "readable_id": "part-3-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220"}, "OM3e-J3euXo": {"duration": 450, "path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof/divergence-theorem-proof-part-2/", "keywords": "", "id": "OM3e-J3euXo", "title": "Divergence theorem proof (part 2)", "description": "Breaking up the surface integral", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OM3e-J3euXo.mp4/OM3e-J3euXo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OM3e-J3euXo.mp4/OM3e-J3euXo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OM3e-J3euXo.m3u8/OM3e-J3euXo.m3u8"}, "slug": "divergence-theorem-proof-part-2", "video_id": "OM3e-J3euXo", "youtube_id": "OM3e-J3euXo", "readable_id": "divergence-theorem-proof-part-2"}, "vOq6cwT-l2U": {"duration": 384, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/conformational-analysis-of-ethane/", "keywords": "", "id": "vOq6cwT-l2U", "title": "Conformational analysis of ethane", "description": "How to analyze the staggered and eclipsed conformations of ethane", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vOq6cwT-l2U.mp4/vOq6cwT-l2U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vOq6cwT-l2U.mp4/vOq6cwT-l2U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vOq6cwT-l2U.m3u8/vOq6cwT-l2U.m3u8"}, "slug": "conformational-analysis-of-ethane", "video_id": "vOq6cwT-l2U", "youtube_id": "vOq6cwT-l2U", "readable_id": "conformational-analysis-of-ethane"}, "VLNxk83TIOU": {"duration": 176, "path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/below-the-surface/", "keywords": "canvas, painting, politics, touch, North America", "id": "VLNxk83TIOU", "title": "Johns, White Flag", "description": "Met curator Ian Alteveer on reticence in Jasper Johns\u2019s White Flag, 1955.\n\nBorn in Augusta, Georgia, in 1930 and raised in South Carolina, Jasper Johns moved in 1949 to New York City, where he enrolled in a commercial art school for two semesters. Back in New York, following his service in the army (ca. 1950\u201351), Johns became acquainted with artist Robert Rauschenberg, composer John Cage, and dancer Merce Cunningham. By the mid- to late 1950s Johns had already achieved fame with his paintings of targets, numerals, and American flags, and his work was exhibited in prominent museums and galleries in New York. \"White Flag\" of 1955, recently acquired by the Metropolitan from the artist's own collection, exemplifies Johns's early style, which engendered a wide range of subsequent art movements, among them Pop Art, Minimal Art, and Conceptual Art. During the 1950s and 1960s Johns frequently appropriated well-known images (such as targets, flags, and beer cans), elevating them to cultural icons. Throughout his oeuvre \u2014 which includes painting, prints, drawings, and sculpture \u2014 images are constantly recycled and combined in extensive series. In his later compositions of the 1970s, Johns filled the surface of his pictures with colorful cross-hatchings (suggested by the passing cars on an expressway); and since the 1980s he has incorporated images that have more autobiographical significance.\n\n\"White Flag\" is the largest of his flag paintings and the first in which the flag is presented in monochrome. By draining most of the color from the flag but leaving subtle gradations in tone, the artist shifts our attention from the familiarity of the image to the way in which it is made. \"White Flag\" is painted on three separate panels: the stars, the seven upper stripes to the right of the stars, and the longer stripes below. Johns worked on each panel separately. After applying a ground of unbleached beeswax, he built up the stars, the negative areas around them, and the stripes with applications of collage\u2014cut or torn pieces of newsprint, other papers, and bits of fabric. He dipped these into molten beeswax and adhered them to the surface. He then joined the three panels and overpainted them with more beeswax mixed with pigments, adding touches of white oil.\n\nThe fast-setting medium of encaustic enabled Johns to make each brushstroke distinct, while the forty-eight-star flag design\u2014contiguous with the perimeters of the canvas\u2014 provided a structure for the richly varied surface, which ranges from translucent to opaque.\n\nView this work on metmuseum.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VLNxk83TIOU.mp4/VLNxk83TIOU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VLNxk83TIOU.mp4/VLNxk83TIOU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VLNxk83TIOU.m3u8/VLNxk83TIOU.m3u8"}, "slug": "below-the-surface", "video_id": "VLNxk83TIOU", "youtube_id": "VLNxk83TIOU", "readable_id": "below-the-surface"}, "oRKxmXwLvUU": {"duration": 705, "path": "khan/science/physics/one-dimensional-motion/displacement-velocity-time/calculating-average-velocity-or-speed/", "keywords": "Calculating, Average, Velocity, or, Speed", "id": "oRKxmXwLvUU", "title": "Calculating average velocity or speed", "description": "Example of calculating speed and velocity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oRKxmXwLvUU.mp4/oRKxmXwLvUU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oRKxmXwLvUU.mp4/oRKxmXwLvUU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oRKxmXwLvUU.m3u8/oRKxmXwLvUU.m3u8"}, "slug": "calculating-average-velocity-or-speed", "video_id": "oRKxmXwLvUU", "youtube_id": "oRKxmXwLvUU", "readable_id": "calculating-average-velocity-or-speed"}, "mk8w3bzEJYU": {"duration": 476, "path": "khan/test-prep/mcat/individuals-and-society/social-interactions/aggression/", "keywords": "", "id": "mk8w3bzEJYU", "title": "Aggression", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mk8w3bzEJYU.mp4/mk8w3bzEJYU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mk8w3bzEJYU.mp4/mk8w3bzEJYU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mk8w3bzEJYU.m3u8/mk8w3bzEJYU.m3u8"}, "slug": "aggression", "video_id": "mk8w3bzEJYU", "youtube_id": "mk8w3bzEJYU", "readable_id": "aggression"}, "8gX_LBv4ZD0": {"duration": 375, "path": "khan/test-prep/nclex-rn/rn-mental-health/anxiety-rn/obsessive-compulsive-disorder/", "keywords": "Compulsive Behavior (Symptom),Obsessive-compulsive Disorder (Disease Or Medical Condition),Health (Industry)", "id": "8gX_LBv4ZD0", "title": "Obsessive compulsive disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8gX_LBv4ZD0.mp4/8gX_LBv4ZD0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8gX_LBv4ZD0.mp4/8gX_LBv4ZD0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8gX_LBv4ZD0.m3u8/8gX_LBv4ZD0.m3u8"}, "slug": "obsessive-compulsive-disorder", "video_id": "8gX_LBv4ZD0", "youtube_id": "8gX_LBv4ZD0", "readable_id": "obsessive-compulsive-disorder"}, "-1ZFVwMXSXY": {"duration": 601, "path": "khan/computing/computer-science/cryptography/crypt/case-study-ww2-encryption-machines/", "keywords": "engima, ww2, encryption machine, one-time-pad, german ", "id": "-1ZFVwMXSXY", "title": "The Enigma encryption machine", "description": "WW2 Encryption is explored with a focus on the Enigma. Read more here.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-1ZFVwMXSXY.mp4/-1ZFVwMXSXY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-1ZFVwMXSXY.mp4/-1ZFVwMXSXY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-1ZFVwMXSXY.m3u8/-1ZFVwMXSXY.m3u8"}, "slug": "case-study-ww2-encryption-machines", "video_id": "-1ZFVwMXSXY", "youtube_id": "-1ZFVwMXSXY", "readable_id": "case-study-ww2-encryption-machines"}, "ZbN_ispEm3A": {"duration": 275, "path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-8/", "keywords": "", "id": "ZbN_ispEm3A", "title": "Connect the LEDs to an on/off switch", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZbN_ispEm3A.mp4/ZbN_ispEm3A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZbN_ispEm3A.mp4/ZbN_ispEm3A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZbN_ispEm3A.m3u8/ZbN_ispEm3A.m3u8"}, "slug": "solderless-spout-8", "video_id": "ZbN_ispEm3A", "youtube_id": "ZbN_ispEm3A", "readable_id": "solderless-spout-8"}, "ShzW1LoQgoc": {"duration": 522, "path": "khan/test-prep/mcat/chemical-processes/kinetics/mechanisms-and-the-rate-determining-step/", "keywords": "", "id": "ShzW1LoQgoc", "title": "Mechanisms and the rate-determining step", "description": "An introduction to mechanisms and the rate determining step. Example of finding rate law of multistep reaction with initial slow step.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ShzW1LoQgoc.mp4/ShzW1LoQgoc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ShzW1LoQgoc.mp4/ShzW1LoQgoc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ShzW1LoQgoc.m3u8/ShzW1LoQgoc.m3u8"}, "slug": "mechanisms-and-the-rate-determining-step", "video_id": "ShzW1LoQgoc", "youtube_id": "ShzW1LoQgoc", "readable_id": "mechanisms-and-the-rate-determining-step"}, "dLtFP6t99yo": {"duration": 444, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/heart-attack-myocardial-infarction-interventions-and-treatment/", "keywords": "", "id": "dLtFP6t99yo", "title": "Heart attack (myocardial infarction) interventions and treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dLtFP6t99yo.mp4/dLtFP6t99yo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dLtFP6t99yo.mp4/dLtFP6t99yo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dLtFP6t99yo.m3u8/dLtFP6t99yo.m3u8"}, "slug": "heart-attack-myocardial-infarction-interventions-and-treatment", "video_id": "dLtFP6t99yo", "youtube_id": "dLtFP6t99yo", "readable_id": "heart-attack-myocardial-infarction-interventions-and-treatment"}, "omy9xziXIEI": {"duration": 232, "path": "khan/humanities/art-asia/himalayas/tibet/sacred-arts-of-tibet/", "keywords": "Tibet, Tibetan art", "id": "omy9xziXIEI", "title": "Sacred arts of Tibet", "description": "Discover the sacred arts of Tibet. Learn more about Tibet on the\u00a0Asian Art Museum's education website.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/omy9xziXIEI.mp4/omy9xziXIEI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/omy9xziXIEI.mp4/omy9xziXIEI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/omy9xziXIEI.m3u8/omy9xziXIEI.m3u8"}, "slug": "sacred-arts-of-tibet", "video_id": "omy9xziXIEI", "youtube_id": "omy9xziXIEI", "readable_id": "sacred-arts-of-tibet"}, "69rDtSpshAw": {"duration": 409, "path": "khan/math/recreational-math/puzzles/brain-teasers/liar-truthteller-brain-teaser/", "keywords": "brain, teaser, logic", "id": "69rDtSpshAw", "title": "Liar truth-teller brain teaser", "description": "How to get correct advice when you can only ask one question from either a liar or a truth-teller (when you don't know who is what)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/69rDtSpshAw.mp4/69rDtSpshAw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/69rDtSpshAw.mp4/69rDtSpshAw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/69rDtSpshAw.m3u8/69rDtSpshAw.m3u8"}, "slug": "liar-truthteller-brain-teaser", "video_id": "69rDtSpshAw", "youtube_id": "69rDtSpshAw", "readable_id": "liar-truthteller-brain-teaser"}, "HWivDUWFaX0": {"duration": 141, "path": "khan/humanities/art-1010/early-abstraction/expressionism1/kirchner-street-berlin/", "keywords": "", "id": "HWivDUWFaX0", "title": "Ernst Ludwig Kirchner, \"Street, Berlin\"", "description": "Walk the streets of 1913 Berlin with the Expressionist painter Ernst Ludwig Kirchner.\u00a0To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HWivDUWFaX0.mp4/HWivDUWFaX0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HWivDUWFaX0.mp4/HWivDUWFaX0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HWivDUWFaX0.m3u8/HWivDUWFaX0.m3u8"}, "slug": "kirchner-street-berlin", "video_id": "HWivDUWFaX0", "youtube_id": "HWivDUWFaX0", "readable_id": "kirchner-street-berlin"}, "B2vtvtqZwwQ": {"duration": 326, "path": "khan/test-prep/mcat/processing-the-environment/sound-audition/auditory-structure-part-2/", "keywords": "", "id": "B2vtvtqZwwQ", "title": "Auditory structure - part 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/B2vtvtqZwwQ.mp4/B2vtvtqZwwQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/B2vtvtqZwwQ.mp4/B2vtvtqZwwQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/B2vtvtqZwwQ.m3u8/B2vtvtqZwwQ.m3u8"}, "slug": "auditory-structure-part-2", "video_id": "B2vtvtqZwwQ", "youtube_id": "B2vtvtqZwwQ", "readable_id": "auditory-structure-part-2"}, "MILF-9GeMDQ": {"duration": 597, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/federal-reserve-balance-sheet/", "keywords": "federal, reserve, balance, sheet", "id": "MILF-9GeMDQ", "title": "Federal Reserve balance sheet", "description": "Analysis of the federal reserve balance sheet as of Feb 2007.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MILF-9GeMDQ.mp4/MILF-9GeMDQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MILF-9GeMDQ.mp4/MILF-9GeMDQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MILF-9GeMDQ.m3u8/MILF-9GeMDQ.m3u8"}, "slug": "federal-reserve-balance-sheet", "video_id": "MILF-9GeMDQ", "youtube_id": "MILF-9GeMDQ", "readable_id": "federal-reserve-balance-sheet"}, "s1UQQELPyrc": {"duration": 511, "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/monopolist-optimizing-price-part-2-marginal-revenue/", "keywords": "microeconomics, monopoly", "id": "s1UQQELPyrc", "title": "Monopolist optimizing price: Marginal revenue", "description": "Plotting the marginal revenue curve for a monopolist", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/s1UQQELPyrc.mp4/s1UQQELPyrc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/s1UQQELPyrc.mp4/s1UQQELPyrc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/s1UQQELPyrc.m3u8/s1UQQELPyrc.m3u8"}, "slug": "monopolist-optimizing-price-part-2-marginal-revenue", "video_id": "s1UQQELPyrc", "youtube_id": "s1UQQELPyrc", "readable_id": "monopolist-optimizing-price-part-2-marginal-revenue"}, "6PjBb-r54A8": {"duration": 53, "path": "khan/college-admissions/making-high-school-count/high-school-classes/ss-high-school-classes/", "keywords": "", "id": "6PjBb-r54A8", "title": "Student story: High school classes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6PjBb-r54A8.mp4/6PjBb-r54A8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6PjBb-r54A8.mp4/6PjBb-r54A8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6PjBb-r54A8.m3u8/6PjBb-r54A8.m3u8"}, "slug": "ss-high-school-classes", "video_id": "6PjBb-r54A8", "youtube_id": "6PjBb-r54A8", "readable_id": "ss-high-school-classes"}, "dmN_s286dHc": {"duration": 831, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-40/", "keywords": "gmat, data, sufficiency, math", "id": "dmN_s286dHc", "title": "GMAT: Data sufficiency 40", "description": "151-153, pg. 290", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dmN_s286dHc.mp4/dmN_s286dHc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dmN_s286dHc.mp4/dmN_s286dHc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dmN_s286dHc.m3u8/dmN_s286dHc.m3u8"}, "slug": "gmat-data-sufficiency-40", "video_id": "dmN_s286dHc", "youtube_id": "dmN_s286dHc", "readable_id": "gmat-data-sufficiency-40"}, "IjiHwNLYLcM": {"duration": 82, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-6-8/", "keywords": "", "id": "IjiHwNLYLcM", "title": "8 Solving for proportionality constant", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IjiHwNLYLcM.mp4/IjiHwNLYLcM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IjiHwNLYLcM.mp4/IjiHwNLYLcM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IjiHwNLYLcM.m3u8/IjiHwNLYLcM.m3u8"}, "slug": "sat-2010-may-6-8", "video_id": "IjiHwNLYLcM", "youtube_id": "IjiHwNLYLcM", "readable_id": "sat-2010-may-6-8"}, "SZ6WuRkummY": {"duration": 142, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p12-easier/", "keywords": "", "id": "SZ6WuRkummY", "title": "Nonlinear equation graphs \u2014 Basic example", "description": "Watch Sal work through a basic Nonlinear equation graphs problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SZ6WuRkummY.mp4/SZ6WuRkummY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SZ6WuRkummY.mp4/SZ6WuRkummY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SZ6WuRkummY.m3u8/SZ6WuRkummY.m3u8"}, "slug": "sat-math-p12-easier", "video_id": "SZ6WuRkummY", "youtube_id": "SZ6WuRkummY", "readable_id": "sat-math-p12-easier"}, "I1KmEWmmozc": {"duration": 187, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-4-16/", "keywords": "", "id": "I1KmEWmmozc", "title": "16 Shortest path", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I1KmEWmmozc.mp4/I1KmEWmmozc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I1KmEWmmozc.mp4/I1KmEWmmozc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I1KmEWmmozc.m3u8/I1KmEWmmozc.m3u8"}, "slug": "sat-2008-may-4-16", "video_id": "I1KmEWmmozc", "youtube_id": "I1KmEWmmozc", "readable_id": "sat-2008-may-4-16"}, "bK85aZPR3UY": {"duration": 269, "path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/mating-behavior-and-inclusive-fitness/", "keywords": "", "id": "bK85aZPR3UY", "title": "Mating behavior and inclusive fitness", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bK85aZPR3UY.mp4/bK85aZPR3UY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bK85aZPR3UY.mp4/bK85aZPR3UY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bK85aZPR3UY.m3u8/bK85aZPR3UY.m3u8"}, "slug": "mating-behavior-and-inclusive-fitness", "video_id": "bK85aZPR3UY", "youtube_id": "bK85aZPR3UY", "readable_id": "mating-behavior-and-inclusive-fitness"}, "Aig1hkq3OsU": {"duration": 418, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/solving_for_variable/example-of-solving-for-a-variable/", "keywords": "U02_L1_T4_we1, algebra, solving, variable, CC_6_EE_2_c, CC_6_EE_6, CC_7_EE_4_a, CC_8_EE_7_b, CC_39336_A-REI_3", "id": "Aig1hkq3OsU", "title": "Example: Solving for a variable", "description": "Example of solving for a variable", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Aig1hkq3OsU.mp4/Aig1hkq3OsU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Aig1hkq3OsU.mp4/Aig1hkq3OsU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Aig1hkq3OsU.m3u8/Aig1hkq3OsU.m3u8"}, "slug": "example-of-solving-for-a-variable", "video_id": "Aig1hkq3OsU", "youtube_id": "Aig1hkq3OsU", "readable_id": "example-of-solving-for-a-variable"}, "cP8iQu57dQo": {"duration": 527, "path": "khan/science/biology/membranes-and-transport/the-plasma-membrane/fluid-mosaic-model-of-cell-membranes/", "keywords": "education,online learning,learning,lessons,fluid mosaic model,glycoprotein,cell membrane,glycolipid,cholesterol", "id": "cP8iQu57dQo", "title": "Fluid mosaic model of cell membranes", "description": "Fluid mosaic model of cell membranes; the role of phospholipids, proteins, glycoproteins, cholesterol, and glycolipids in cell membranes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cP8iQu57dQo.mp4/cP8iQu57dQo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cP8iQu57dQo.mp4/cP8iQu57dQo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cP8iQu57dQo.m3u8/cP8iQu57dQo.m3u8"}, "slug": "fluid-mosaic-model-of-cell-membranes", "video_id": "cP8iQu57dQo", "youtube_id": "cP8iQu57dQo", "readable_id": "fluid-mosaic-model-of-cell-membranes"}, "hZvjH3Az87A": {"duration": 220, "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/balance-sheet-and-income-statement-relationship/", "keywords": "Balance, Sheet, and, Income, Statement, Relationship", "id": "hZvjH3Az87A", "title": "Balance sheet and income statement relationship", "description": "Balance Sheet and Income Statement Relationship", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hZvjH3Az87A.mp4/hZvjH3Az87A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hZvjH3Az87A.mp4/hZvjH3Az87A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hZvjH3Az87A.m3u8/hZvjH3Az87A.m3u8"}, "slug": "balance-sheet-and-income-statement-relationship", "video_id": "hZvjH3Az87A", "youtube_id": "hZvjH3Az87A", "readable_id": "balance-sheet-and-income-statement-relationship"}, "xOa-l_tXgWA": {"duration": 430, "path": "khan/math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers/complex-number-division/", "keywords": "", "id": "xOa-l_tXgWA", "title": "Dividing complex numbers in polar and exponential form", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xOa-l_tXgWA.mp4/xOa-l_tXgWA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xOa-l_tXgWA.mp4/xOa-l_tXgWA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xOa-l_tXgWA.m3u8/xOa-l_tXgWA.m3u8"}, "slug": "complex-number-division", "video_id": "xOa-l_tXgWA", "youtube_id": "xOa-l_tXgWA", "readable_id": "complex-number-division"}, "9p10aMu1Glo": {"duration": 420, "path": "khan/economics-finance-domain/core-finance/money-and-banking/greek-debt-crisis/greek-debt-recession-and-austerity-part-1/", "keywords": "EU, crisis, greece, italy, spain", "id": "9p10aMu1Glo", "title": "Greek debt recession and austerity (part 1)", "description": "A primer of why Greece is in a tough situation (more in future videos)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9p10aMu1Glo.mp4/9p10aMu1Glo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9p10aMu1Glo.mp4/9p10aMu1Glo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9p10aMu1Glo.m3u8/9p10aMu1Glo.m3u8"}, "slug": "greek-debt-recession-and-austerity-part-1", "video_id": "9p10aMu1Glo", "youtube_id": "9p10aMu1Glo", "readable_id": "greek-debt-recession-and-austerity-part-1"}, "_QM-DfhrNv8": {"duration": 640, "path": "khan/test-prep/ap-art-history/introduction-ap-arthistory/goya-third-may/", "keywords": "goya,methodology,art,Art History (Field Of Study),formal analysis,context,narrative,subject matter,methods,analysis,Francisco de Goya,Third of May,1808", "id": "_QM-DfhrNv8", "title": "Art historical analysis (painting), a basic introduction using Goya's Third of May, 1808", "description": "Francisco de Goya, Third of May, 1808, 1814, oil on canvas, 266 x 345.1 cm (Museo del Prado. Madrid)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_QM-DfhrNv8.mp4/_QM-DfhrNv8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_QM-DfhrNv8.mp4/_QM-DfhrNv8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_QM-DfhrNv8.m3u8/_QM-DfhrNv8.m3u8"}, "slug": "goya-third-may", "video_id": "_QM-DfhrNv8", "youtube_id": "_QM-DfhrNv8", "readable_id": "goya-third-may"}, "EUqhLxFccbM": {"duration": 104, "path": "khan/math/early-math/cc-early-math-counting-topic/cc-early-math-count-object-topic/counting-objects-2/", "keywords": "", "id": "EUqhLxFccbM", "title": "Counting dogs, mice, and cookies", "description": "Learn how to count animals organized in different patterns.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EUqhLxFccbM.mp4/EUqhLxFccbM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EUqhLxFccbM.mp4/EUqhLxFccbM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EUqhLxFccbM.m3u8/EUqhLxFccbM.m3u8"}, "slug": "counting-objects-2", "video_id": "EUqhLxFccbM", "youtube_id": "EUqhLxFccbM", "readable_id": "counting-objects-2"}, "YKQLZOq4HTA": {"duration": 279, "path": "khan/math/algebra/linear_inequalities/compound_absolute_value_inequali/absolute-value-inequalities-example-2/", "keywords": "u10_l3_t2_we2, Absolute, Value, Inequalities, CC_6_EE_8, CC_6_NS_6_c, CC_6_NS_7_a, CC_6_NS_7_c, CC_6_NS_7_d, CC_7_EE_4, CC_7_EE_4_b, CC_7_NS_1, CC_7_NS_1_c, CC_39336_A-CED_1, CC_39336_A-CED_3", "id": "YKQLZOq4HTA", "title": "Absolute value inequalities example 2", "description": "Absolute Value Inequalities", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YKQLZOq4HTA.mp4/YKQLZOq4HTA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YKQLZOq4HTA.mp4/YKQLZOq4HTA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YKQLZOq4HTA.m3u8/YKQLZOq4HTA.m3u8"}, "slug": "absolute-value-inequalities-example-2", "video_id": "YKQLZOq4HTA", "youtube_id": "YKQLZOq4HTA", "readable_id": "absolute-value-inequalities-example-2"}, "6_9xNMtwnfs": {"duration": 155, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/slope/slope-intuition-example/", "keywords": "", "id": "6_9xNMtwnfs", "title": "Intuitive understanding of slope example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6_9xNMtwnfs.mp4/6_9xNMtwnfs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6_9xNMtwnfs.mp4/6_9xNMtwnfs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6_9xNMtwnfs.m3u8/6_9xNMtwnfs.m3u8"}, "slug": "slope-intuition-example", "video_id": "6_9xNMtwnfs", "youtube_id": "6_9xNMtwnfs", "readable_id": "slope-intuition-example"}, "C9ITaG1_XoA": {"duration": 156, "path": "khan/science/discoveries-projects/robots/bit-zee/connecting-the-motor-controller-to-the-arduino/", "keywords": "bit-zee motor controller arduino make hack diy", "id": "C9ITaG1_XoA", "title": "Motor controller connection to Arduino", "description": "In this video we show you how to determine which wire is which and how to connect them to your Arduino.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C9ITaG1_XoA.mp4/C9ITaG1_XoA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C9ITaG1_XoA.mp4/C9ITaG1_XoA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C9ITaG1_XoA.m3u8/C9ITaG1_XoA.m3u8"}, "slug": "connecting-the-motor-controller-to-the-arduino", "video_id": "C9ITaG1_XoA", "youtube_id": "C9ITaG1_XoA", "readable_id": "connecting-the-motor-controller-to-the-arduino"}, "2kSqB7y0NjU": {"duration": 185, "path": "khan/partner-content/wi-phi/critical-thinking/implicit-premise/", "keywords": "", "id": "2kSqB7y0NjU", "title": "Fundamentals: Implicit Premise", "description": "This video will rock your world! You should watch it. This pithy little argument contains an implicit premise: \"If a video will rock your world, you should watch it\". In this video, Kelley will go over how to identify implicit premises in all sorts of arguments and discuss when it is and is not acceptable to leave a premise implicit.\n\nSpeaker:\u00a0Kelly Schiffman", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2kSqB7y0NjU.mp4/2kSqB7y0NjU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2kSqB7y0NjU.mp4/2kSqB7y0NjU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2kSqB7y0NjU.m3u8/2kSqB7y0NjU.m3u8"}, "slug": "implicit-premise", "video_id": "2kSqB7y0NjU", "youtube_id": "2kSqB7y0NjU", "readable_id": "implicit-premise"}, "o8fYEZdTpEE": {"duration": 172, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-14-small-arc-length/", "keywords": "", "id": "o8fYEZdTpEE", "title": "14 Small arc length", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o8fYEZdTpEE.mp4/o8fYEZdTpEE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o8fYEZdTpEE.mp4/o8fYEZdTpEE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o8fYEZdTpEE.m3u8/o8fYEZdTpEE.m3u8"}, "slug": "sat-14-small-arc-length", "video_id": "o8fYEZdTpEE", "youtube_id": "o8fYEZdTpEE", "readable_id": "sat-14-small-arc-length"}, "4-_-wQc3EGE": {"duration": 523, "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/deriving-demand-curve-from-tweaking-marginal-utility-per-dollar/", "keywords": "microeconomics", "id": "4-_-wQc3EGE", "title": "Deriving demand curve from tweaking marginal utility per dollar", "description": "Seeing what happens to quantity demanded when price changes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4-_-wQc3EGE.mp4/4-_-wQc3EGE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4-_-wQc3EGE.mp4/4-_-wQc3EGE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4-_-wQc3EGE.m3u8/4-_-wQc3EGE.m3u8"}, "slug": "deriving-demand-curve-from-tweaking-marginal-utility-per-dollar", "video_id": "4-_-wQc3EGE", "youtube_id": "4-_-wQc3EGE", "readable_id": "deriving-demand-curve-from-tweaking-marginal-utility-per-dollar"}, "Mz2nDXElcoM": {"duration": 637, "path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/ice-accelerating-down-an-incline/", "keywords": "inclined, plane, ramp, force, friction", "id": "Mz2nDXElcoM", "title": "Ice accelerating down an incline", "description": "Figuring out the acceleration of ice down a plane made of ice", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mz2nDXElcoM.mp4/Mz2nDXElcoM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mz2nDXElcoM.mp4/Mz2nDXElcoM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mz2nDXElcoM.m3u8/Mz2nDXElcoM.m3u8"}, "slug": "ice-accelerating-down-an-incline", "video_id": "Mz2nDXElcoM", "youtube_id": "Mz2nDXElcoM", "readable_id": "ice-accelerating-down-an-incline"}, "ivy1QmWUtQI": {"duration": 357, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/human-capital/", "keywords": "capitalism, factors, of, production", "id": "ivy1QmWUtQI", "title": "Human capital", "description": "Basic overview of capital and human capital", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ivy1QmWUtQI.mp4/ivy1QmWUtQI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ivy1QmWUtQI.mp4/ivy1QmWUtQI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ivy1QmWUtQI.m3u8/ivy1QmWUtQI.m3u8"}, "slug": "human-capital", "video_id": "ivy1QmWUtQI", "youtube_id": "ivy1QmWUtQI", "readable_id": "human-capital"}, "3v9w79NhsfI": {"duration": 332, "path": "khan/math/probability/random-variables-topic/random_variables_prob_dist/random-variables/", "keywords": "", "id": "3v9w79NhsfI", "title": "Random variables", "description": "Basic idea and definitions of random variables", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3v9w79NhsfI.mp4/3v9w79NhsfI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3v9w79NhsfI.mp4/3v9w79NhsfI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3v9w79NhsfI.m3u8/3v9w79NhsfI.m3u8"}, "slug": "random-variables", "video_id": "3v9w79NhsfI", "youtube_id": "3v9w79NhsfI", "readable_id": "random-variables"}, "4J-dRA3MGc8": {"duration": 727, "path": "khan/science/health-and-medicine/health-care-system/paying-doctors/", "keywords": "healthcare, economics", "id": "4J-dRA3MGc8", "title": "Paying doctors", "description": "Basics of how doctors get paid", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4J-dRA3MGc8.mp4/4J-dRA3MGc8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4J-dRA3MGc8.mp4/4J-dRA3MGc8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4J-dRA3MGc8.m3u8/4J-dRA3MGc8.m3u8"}, "slug": "paying-doctors", "video_id": "4J-dRA3MGc8", "youtube_id": "4J-dRA3MGc8", "readable_id": "paying-doctors"}, "Wph0cBNi7Yo": {"duration": 373, "path": "khan/humanities/art-asia/southeast-asia/maritime-se-asia/wayang-golek/", "keywords": "", "id": "Wph0cBNi7Yo", "title": "Indonesian rod puppets (wayang golek)", "description": "Indonesian rod puppet (wayang golek) performances are a kind of blessing bestowed on special events such as circumcisions, weddings, celebrations\u00a0of the ancestors, and other rites of passage and public events. The performers may be hired by an individual or a\u00a0family holding a life cycle ceremony, or by an entire village. A performance is meant to engage all members of the\u00a0community.\u00a0 Puppet Master Kathey Foley discusses the charcter types associated with Indonesian rod puppets. \u00a0Learn more about the puppet theater of Indonesia.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Wph0cBNi7Yo.mp4/Wph0cBNi7Yo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Wph0cBNi7Yo.mp4/Wph0cBNi7Yo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Wph0cBNi7Yo.m3u8/Wph0cBNi7Yo.m3u8"}, "slug": "wayang-golek", "video_id": "Wph0cBNi7Yo", "youtube_id": "Wph0cBNi7Yo", "readable_id": "wayang-golek"}, "ROpbdO-gRUo": {"duration": 645, "path": "khan/math/probability/regression/regression-correlation/correlation-and-causality/", "keywords": "statistic, health, nutrition", "id": "ROpbdO-gRUo", "title": "Correlation and causality", "description": "Understanding why correlation does not imply causality (even though many in the press and some researchers often imply otherwise)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ROpbdO-gRUo.mp4/ROpbdO-gRUo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ROpbdO-gRUo.mp4/ROpbdO-gRUo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ROpbdO-gRUo.m3u8/ROpbdO-gRUo.m3u8"}, "slug": "correlation-and-causality", "video_id": "ROpbdO-gRUo", "youtube_id": "ROpbdO-gRUo", "readable_id": "correlation-and-causality"}, "j3oBvc3lKsY": {"duration": 502, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/skeletal-endocrine-control/", "keywords": "", "id": "j3oBvc3lKsY", "title": "Skeletal endocrine control", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j3oBvc3lKsY.mp4/j3oBvc3lKsY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j3oBvc3lKsY.mp4/j3oBvc3lKsY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j3oBvc3lKsY.m3u8/j3oBvc3lKsY.m3u8"}, "slug": "skeletal-endocrine-control", "video_id": "j3oBvc3lKsY", "youtube_id": "j3oBvc3lKsY", "readable_id": "skeletal-endocrine-control"}, "8aeivxR1GDc": {"duration": 507, "path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/hypertension-symptoms-and-categories/", "keywords": "", "id": "8aeivxR1GDc", "title": "Hypertension symptoms and categories", "description": "Learn the most common symptoms (or lack thereof!) and the two major categories of hypertension. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8aeivxR1GDc.mp4/8aeivxR1GDc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8aeivxR1GDc.mp4/8aeivxR1GDc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8aeivxR1GDc.m3u8/8aeivxR1GDc.m3u8"}, "slug": "hypertension-symptoms-and-categories", "video_id": "8aeivxR1GDc", "youtube_id": "8aeivxR1GDc", "readable_id": "hypertension-symptoms-and-categories"}, "W3C07uH-b9o": {"duration": 696, "path": "khan/math/probability/statistical-studies/hypothesis-test/statistical-significance-on-bus-speeds/", "keywords": "", "id": "W3C07uH-b9o", "title": "Statistical significance on bus speeds", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W3C07uH-b9o.mp4/W3C07uH-b9o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W3C07uH-b9o.mp4/W3C07uH-b9o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W3C07uH-b9o.m3u8/W3C07uH-b9o.m3u8"}, "slug": "statistical-significance-on-bus-speeds", "video_id": "W3C07uH-b9o", "youtube_id": "W3C07uH-b9o", "readable_id": "statistical-significance-on-bus-speeds"}, "WEYKoJTIHcE": {"duration": 220, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/willem-de-kooning-woman-i-1950-52/", "keywords": "dekooning, woman", "id": "WEYKoJTIHcE", "title": "de Kooning's Woman I", "description": "Willem de Kooning, Woman I, oil on canvas, 1950-52 (MoMA)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WEYKoJTIHcE.mp4/WEYKoJTIHcE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WEYKoJTIHcE.mp4/WEYKoJTIHcE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WEYKoJTIHcE.m3u8/WEYKoJTIHcE.m3u8"}, "slug": "willem-de-kooning-woman-i-1950-52", "video_id": "WEYKoJTIHcE", "youtube_id": "WEYKoJTIHcE", "readable_id": "willem-de-kooning-woman-i-1950-52"}, "Y0eWnOZpSpQ": {"duration": 364, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/plate-tectonics-geological-features-of-convergent-plate-boundaries/", "keywords": "Geological, features, of, Convergent, Plate, Boundaries", "id": "Y0eWnOZpSpQ", "title": "Plate tectonics: Geological features of convergent plate boundaries", "description": "Geological features of Convergent Plate Boundaries", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y0eWnOZpSpQ.mp4/Y0eWnOZpSpQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y0eWnOZpSpQ.mp4/Y0eWnOZpSpQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y0eWnOZpSpQ.m3u8/Y0eWnOZpSpQ.m3u8"}, "slug": "plate-tectonics-geological-features-of-convergent-plate-boundaries", "video_id": "Y0eWnOZpSpQ", "youtube_id": "Y0eWnOZpSpQ", "readable_id": "plate-tectonics-geological-features-of-convergent-plate-boundaries"}, "JXVGPEOQCb8": {"duration": 416, "path": "khan/math/differential-calculus/derivative_applications/absolute-relative-maxima-minima/using-extreme-value-theorem/", "keywords": "", "id": "JXVGPEOQCb8", "title": "Applying extreme value theorem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JXVGPEOQCb8.mp4/JXVGPEOQCb8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JXVGPEOQCb8.mp4/JXVGPEOQCb8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JXVGPEOQCb8.m3u8/JXVGPEOQCb8.m3u8"}, "slug": "using-extreme-value-theorem", "video_id": "JXVGPEOQCb8", "youtube_id": "JXVGPEOQCb8", "readable_id": "using-extreme-value-theorem"}, "GmomzubjO1I": {"duration": 392, "path": "khan/test-prep/mcat/society-and-culture/demographics/globalization-trade-and-transnational-corporations/", "keywords": "", "id": "GmomzubjO1I", "title": "Globalization- trade and transnational corporations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GmomzubjO1I.mp4/GmomzubjO1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GmomzubjO1I.mp4/GmomzubjO1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GmomzubjO1I.m3u8/GmomzubjO1I.m3u8"}, "slug": "globalization-trade-and-transnational-corporations", "video_id": "GmomzubjO1I", "youtube_id": "GmomzubjO1I", "readable_id": "globalization-trade-and-transnational-corporations"}, "Zny3nM8V-D4": {"duration": 67, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-9-3/", "keywords": "", "id": "Zny3nM8V-D4", "title": "3 Distance to reflected point", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zny3nM8V-D4.mp4/Zny3nM8V-D4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zny3nM8V-D4.mp4/Zny3nM8V-D4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zny3nM8V-D4.m3u8/Zny3nM8V-D4.m3u8"}, "slug": "sat-2010-may-9-3", "video_id": "Zny3nM8V-D4", "youtube_id": "Zny3nM8V-D4", "readable_id": "sat-2010-may-9-3"}, "xEDnwEOOf7Y": {"duration": 274, "path": "khan/math/pre-algebra/decimals-pre-alg/dec-perc-frac-pre-alg/adding-fractions-decimals-and-percentages/", "keywords": "", "id": "xEDnwEOOf7Y", "title": "Adding, subtracting fractions, decimals, percentages", "description": "What happens when we are asked to add or subtract fractions, decimals, and percentages? You'll see in this example that we first get them in the same format, and then add fractions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xEDnwEOOf7Y.mp4/xEDnwEOOf7Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xEDnwEOOf7Y.mp4/xEDnwEOOf7Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xEDnwEOOf7Y.m3u8/xEDnwEOOf7Y.m3u8"}, "slug": "adding-fractions-decimals-and-percentages", "video_id": "xEDnwEOOf7Y", "youtube_id": "xEDnwEOOf7Y", "readable_id": "adding-fractions-decimals-and-percentages"}, "wNYFJsC8TZE": {"duration": 246, "path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/floating-exchange-resolving-trade-imbalance/", "keywords": "Floating, Exchange, Resolving, Trade, Imbalance", "id": "wNYFJsC8TZE", "title": "Floating exchange resolving trade imbalance", "description": "Floating Exchange Resolving Trade Imbalance", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wNYFJsC8TZE.mp4/wNYFJsC8TZE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wNYFJsC8TZE.mp4/wNYFJsC8TZE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wNYFJsC8TZE.m3u8/wNYFJsC8TZE.m3u8"}, "slug": "floating-exchange-resolving-trade-imbalance", "video_id": "wNYFJsC8TZE", "youtube_id": "wNYFJsC8TZE", "readable_id": "floating-exchange-resolving-trade-imbalance"}, "Q1j-gPKAcDA": {"duration": 772, "path": "khan/humanities/renaissance-reformation/mannerism1/benvenuto-cellini-perseus-with-the-head-of-medusa-c-1554/", "keywords": "Cellini, Benvenuto Cellini, Perseus, Medusa, 1554, bronze, Loggia dei Lanzi, Piazza della Signoria, Florence, Mythology, Medici, Mannerism, Sculpture, Mannerist", "id": "Q1j-gPKAcDA", "title": "Cellini, Perseus", "description": "Benvenuto Cellini, Perseus with the Head of Medusa, c. 1554, bronze (Loggia dei Lanzi, Piazza della Signoria, Florence)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q1j-gPKAcDA.mp4/Q1j-gPKAcDA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q1j-gPKAcDA.mp4/Q1j-gPKAcDA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q1j-gPKAcDA.m3u8/Q1j-gPKAcDA.m3u8"}, "slug": "benvenuto-cellini-perseus-with-the-head-of-medusa-c-1554", "video_id": "Q1j-gPKAcDA", "youtube_id": "Q1j-gPKAcDA", "readable_id": "benvenuto-cellini-perseus-with-the-head-of-medusa-c-1554"}, "s38l6nmTrvM": {"duration": 600, "path": "khan/science/physics/torque-angular-momentum/torque-tutorial/cross-product-and-torque/", "keywords": "vector, cross, product, torque", "id": "s38l6nmTrvM", "title": "Cross product and torque", "description": "The cross product and the direction of torque.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/s38l6nmTrvM.mp4/s38l6nmTrvM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/s38l6nmTrvM.mp4/s38l6nmTrvM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/s38l6nmTrvM.m3u8/s38l6nmTrvM.m3u8"}, "slug": "cross-product-and-torque", "video_id": "s38l6nmTrvM", "youtube_id": "s38l6nmTrvM", "readable_id": "cross-product-and-torque"}, "57gz50uTPqM": {"duration": 245, "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/doing-the-example-with-accounts-payable-growing/", "keywords": "accounts, payable, receivable, working, capital", "id": "57gz50uTPqM", "title": "Doing the example with accounts payable growing", "description": "Introduction to Accounts Payable", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/57gz50uTPqM.mp4/57gz50uTPqM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/57gz50uTPqM.mp4/57gz50uTPqM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/57gz50uTPqM.m3u8/57gz50uTPqM.m3u8"}, "slug": "doing-the-example-with-accounts-payable-growing", "video_id": "57gz50uTPqM", "youtube_id": "57gz50uTPqM", "readable_id": "doing-the-example-with-accounts-payable-growing"}, "ZOYRb2sYrL0": {"duration": 420, "path": "khan/math/algebra/introduction-to-algebra/overview_hist_alg/abstract-ness/", "keywords": "algebra, abstract", "id": "ZOYRb2sYrL0", "title": "Abstract-ness", "description": "The general idea behind the word 'abstract'", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZOYRb2sYrL0.mp4/ZOYRb2sYrL0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZOYRb2sYrL0.mp4/ZOYRb2sYrL0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZOYRb2sYrL0.m3u8/ZOYRb2sYrL0.m3u8"}, "slug": "abstract-ness", "video_id": "ZOYRb2sYrL0", "youtube_id": "ZOYRb2sYrL0", "readable_id": "abstract-ness"}, "bJMUKNbAsTY": {"duration": 824, "path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/organic-oxidation-reduction-reactions/", "keywords": "", "id": "bJMUKNbAsTY", "title": "Organic oxidation-reduction reactions", "description": "How to determine if a starting compound is oxidized, reduced, or neither", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bJMUKNbAsTY.mp4/bJMUKNbAsTY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bJMUKNbAsTY.mp4/bJMUKNbAsTY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bJMUKNbAsTY.m3u8/bJMUKNbAsTY.m3u8"}, "slug": "organic-oxidation-reduction-reactions", "video_id": "bJMUKNbAsTY", "youtube_id": "bJMUKNbAsTY", "readable_id": "organic-oxidation-reduction-reactions"}, "BZxZ_eEuJBM": {"duration": 483, "path": "khan/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex/complex-conjugates/", "keywords": "Complex, Conjugates, argand, real, imaginary", "id": "BZxZ_eEuJBM", "title": "Complex conjugates", "description": "Complex Conjugates", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BZxZ_eEuJBM.mp4/BZxZ_eEuJBM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BZxZ_eEuJBM.mp4/BZxZ_eEuJBM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BZxZ_eEuJBM.m3u8/BZxZ_eEuJBM.m3u8"}, "slug": "complex-conjugates", "video_id": "BZxZ_eEuJBM", "youtube_id": "BZxZ_eEuJBM", "readable_id": "complex-conjugates"}, "CFZv-UnbHLA": {"duration": 139, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-6-6/", "keywords": "", "id": "CFZv-UnbHLA", "title": "6 Area of shaded region", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CFZv-UnbHLA.mp4/CFZv-UnbHLA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CFZv-UnbHLA.mp4/CFZv-UnbHLA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CFZv-UnbHLA.m3u8/CFZv-UnbHLA.m3u8"}, "slug": "sat-2010-may-6-6", "video_id": "CFZv-UnbHLA", "youtube_id": "CFZv-UnbHLA", "readable_id": "sat-2010-may-6-6"}, "ccrYD6iX_SY": {"duration": 651, "path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/probability-of-dependent-events-2/", "keywords": "U12_L2_T4_we3, Probability, of, Dependent, Events, CC_7_SP_7", "id": "ccrYD6iX_SY", "title": "Example: Combinatorics and probability", "description": "Probability of getting a set of cards", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ccrYD6iX_SY.mp4/ccrYD6iX_SY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ccrYD6iX_SY.mp4/ccrYD6iX_SY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ccrYD6iX_SY.m3u8/ccrYD6iX_SY.m3u8"}, "slug": "probability-of-dependent-events-2", "video_id": "ccrYD6iX_SY", "youtube_id": "ccrYD6iX_SY", "readable_id": "probability-of-dependent-events-2"}, "9eWyvWq9CCs": {"duration": 887, "path": "khan/math/competition-math/aime/2003-aime/sum-of-polynomial-roots-proof/", "keywords": "Sum, of, Polynomial, Roots, mathematical, induction, algebra", "id": "9eWyvWq9CCs", "title": "Sum of polynomial roots (proof)", "description": "Sum of Polynomial Roots", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9eWyvWq9CCs.mp4/9eWyvWq9CCs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9eWyvWq9CCs.mp4/9eWyvWq9CCs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9eWyvWq9CCs.m3u8/9eWyvWq9CCs.m3u8"}, "slug": "sum-of-polynomial-roots-proof", "video_id": "9eWyvWq9CCs", "youtube_id": "9eWyvWq9CCs", "readable_id": "sum-of-polynomial-roots-proof"}, "H0q9Fqb8YT4": {"duration": 251, "path": "khan/math/algebra-basics/core-algebra-foundations/core-algebra-foundations-fractions/examples-of-dividing-negative-fractions/", "keywords": "", "id": "H0q9Fqb8YT4", "title": "Dividing negative fractions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H0q9Fqb8YT4.mp4/H0q9Fqb8YT4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H0q9Fqb8YT4.mp4/H0q9Fqb8YT4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H0q9Fqb8YT4.m3u8/H0q9Fqb8YT4.m3u8"}, "slug": "examples-of-dividing-negative-fractions", "video_id": "H0q9Fqb8YT4", "youtube_id": "H0q9Fqb8YT4", "readable_id": "examples-of-dividing-negative-fractions"}, "iNemmT1hnzA": {"duration": 257, "path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/data-on-chinese-us-balance-of-payments/", "keywords": "Data, on, Chinese, US, Balance, of, Payments", "id": "iNemmT1hnzA", "title": "Data on Chinese US balance of payments", "description": "Data on Chinese US Balance of Payments", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iNemmT1hnzA.mp4/iNemmT1hnzA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iNemmT1hnzA.mp4/iNemmT1hnzA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iNemmT1hnzA.m3u8/iNemmT1hnzA.m3u8"}, "slug": "data-on-chinese-us-balance-of-payments", "video_id": "iNemmT1hnzA", "youtube_id": "iNemmT1hnzA", "readable_id": "data-on-chinese-us-balance-of-payments"}, "wsL4Uh0BrQw": {"duration": 243, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/rembrandt-van-rijn-bathsheba-at-her-bath-1654/", "keywords": "rembrandt, bathsheba, Louvre, Art History, Smarthistory", "id": "wsL4Uh0BrQw", "title": "Rembrandt, Bathsheba at her Bath", "description": "Rembrandt van Rijn, Bathsheba at Her Bath, 1654, oil on canvas, 56 x 56 in (142 x 142 cm) , Mus\u00e9e du Louvre, Paris Speakers: Drs. Beth Harris and Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wsL4Uh0BrQw.mp4/wsL4Uh0BrQw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wsL4Uh0BrQw.mp4/wsL4Uh0BrQw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wsL4Uh0BrQw.m3u8/wsL4Uh0BrQw.m3u8"}, "slug": "rembrandt-van-rijn-bathsheba-at-her-bath-1654", "video_id": "wsL4Uh0BrQw", "youtube_id": "wsL4Uh0BrQw", "readable_id": "rembrandt-van-rijn-bathsheba-at-her-bath-1654"}, "lA8pSpp-FS4": {"duration": 187, "path": "khan/humanities/art-asia/beginners-guide-asian-culture/buddhist-art-culture/buddha-and-mara/", "keywords": "", "id": "lA8pSpp-FS4", "title": "The Buddha triumphing over Mara", "description": "The main figure in this stone sculpture from the 900s shows many characteristic features of images of the Buddha. Here we see elements that tell us we're in the presence of the Buddha as he was on the threshold of achieving enlightenment. Above his head are branches of heart-shaped leaves. They indicate the sacred bodhi tree, under which he is said to have attained enlightenment some 2,500 years ago. Learn more about this artwork on the education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lA8pSpp-FS4.mp4/lA8pSpp-FS4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lA8pSpp-FS4.mp4/lA8pSpp-FS4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lA8pSpp-FS4.m3u8/lA8pSpp-FS4.m3u8"}, "slug": "buddha-and-mara", "video_id": "lA8pSpp-FS4", "youtube_id": "lA8pSpp-FS4", "readable_id": "buddha-and-mara"}, "5z568fLBQyQ": {"duration": 156, "path": "khan/math/pre-algebra/decimals-pre-alg/percent-intro-pre-alg/converting-decimals-to-percents-ex-1/", "keywords": "Converting, decimals, to, percents, ex, 1", "id": "5z568fLBQyQ", "title": "Converting decimals to percents", "description": "Need to convert a decimal to a percent? Ok, we'll just use our fraction friends to get us there. Watch and be amazed.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5z568fLBQyQ.mp4/5z568fLBQyQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5z568fLBQyQ.mp4/5z568fLBQyQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5z568fLBQyQ.m3u8/5z568fLBQyQ.m3u8"}, "slug": "converting-decimals-to-percents-ex-1", "video_id": "5z568fLBQyQ", "youtube_id": "5z568fLBQyQ", "readable_id": "converting-decimals-to-percents-ex-1"}, "gD7A1LA4jO8": {"duration": 326, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/modeling-with-rational-functions/applying-rational-equations-1/", "keywords": "U11_L2_T2_we1, Applying, Rational, Equations, CC_39336_A-APR_7, CC_39336_A-CED_1", "id": "gD7A1LA4jO8", "title": "How to solve combined rates word problem with rational equations (example)", "description": "Sal solves a word problem about the combined leaf-bagging rates of Ian and Kyandre, by creating a rational equation that models the situation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gD7A1LA4jO8.mp4/gD7A1LA4jO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gD7A1LA4jO8.mp4/gD7A1LA4jO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gD7A1LA4jO8.m3u8/gD7A1LA4jO8.m3u8"}, "slug": "applying-rational-equations-1", "video_id": "gD7A1LA4jO8", "youtube_id": "gD7A1LA4jO8", "readable_id": "applying-rational-equations-1"}, "w702yvnip_w": {"duration": 221, "path": "khan/humanities/art-1010/art-between-wars/surrealism1/magritte-the-treachery-of-images-ceci-n-est-pas-une-pipe-1929/", "keywords": "Magritte, Pipe, surrealism, LACMA, Smarthistory, Art History, Khan Academy", "id": "w702yvnip_w", "title": "Magritte, The Treachery of Images (Ceci n\u2019est pas une pipe)", "description": "Ren\u00e9 Magritte, The Treachery of Images (Ceci n'est pas une pipe), 1929 (LACMA) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w702yvnip_w.mp4/w702yvnip_w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w702yvnip_w.mp4/w702yvnip_w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w702yvnip_w.m3u8/w702yvnip_w.m3u8"}, "slug": "magritte-the-treachery-of-images-ceci-n-est-pas-une-pipe-1929", "video_id": "w702yvnip_w", "youtube_id": "w702yvnip_w", "readable_id": "magritte-the-treachery-of-images-ceci-n-est-pas-une-pipe-1929"}, "3cHxWUnde6E": {"duration": 147, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-15/", "keywords": "", "id": "3cHxWUnde6E", "title": "15 Slope of perpendicular line", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3cHxWUnde6E.mp4/3cHxWUnde6E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3cHxWUnde6E.mp4/3cHxWUnde6E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3cHxWUnde6E.m3u8/3cHxWUnde6E.m3u8"}, "slug": "2013-sat-practice-6-15", "video_id": "3cHxWUnde6E", "youtube_id": "3cHxWUnde6E", "readable_id": "2013-sat-practice-6-15"}, "8Wxw9bpKEGQ": {"duration": 200, "path": "khan/math/algebra2/arithmetic-with-polynomials/long-division-of-polynomials/dividing-polynomials-1/", "keywords": "u11_l2_t6_we1, Dividing, polynomials, CC_6_EE_1, CC_6_EE_2_c, CC_39336_A-APR_1", "id": "8Wxw9bpKEGQ", "title": "How to divide a quadratic expression by a linear expression using long division (example)", "description": "Sal divides (x^2-3x+2) by (x-2) and then checks the solution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8Wxw9bpKEGQ.mp4/8Wxw9bpKEGQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8Wxw9bpKEGQ.mp4/8Wxw9bpKEGQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8Wxw9bpKEGQ.m3u8/8Wxw9bpKEGQ.m3u8"}, "slug": "dividing-polynomials-1", "video_id": "8Wxw9bpKEGQ", "youtube_id": "8Wxw9bpKEGQ", "readable_id": "dividing-polynomials-1"}, "x0pFo1RxTzM": {"duration": 265, "path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/changing-glomerular-filtration-rate/", "keywords": "", "id": "x0pFo1RxTzM", "title": "Changing glomerular filtration rate", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x0pFo1RxTzM.mp4/x0pFo1RxTzM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x0pFo1RxTzM.mp4/x0pFo1RxTzM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x0pFo1RxTzM.m3u8/x0pFo1RxTzM.m3u8"}, "slug": "changing-glomerular-filtration-rate", "video_id": "x0pFo1RxTzM", "youtube_id": "x0pFo1RxTzM", "readable_id": "changing-glomerular-filtration-rate"}, "qEB6y4DklNY": {"duration": 611, "path": "khan/math/algebra2/exponential_and_logarithmic_func/continuous_compounding/introduction-to-compound-interest-and-e/", "keywords": "compount, interest, limit, continuous, CC_39336_A-SSE_3_c", "id": "qEB6y4DklNY", "title": "Introduction to compound interest and e", "description": "Compounding interest multiple times a year.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qEB6y4DklNY.mp4/qEB6y4DklNY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qEB6y4DklNY.mp4/qEB6y4DklNY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qEB6y4DklNY.m3u8/qEB6y4DklNY.m3u8"}, "slug": "introduction-to-compound-interest-and-e", "video_id": "qEB6y4DklNY", "youtube_id": "qEB6y4DklNY", "readable_id": "introduction-to-compound-interest-and-e"}, "FJo18AwLfuI": {"duration": 315, "path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/l-hopital-s-rule-example-2/", "keywords": "L'Hopital's, Rule, Example", "id": "FJo18AwLfuI", "title": "L'H\u00f4pital's rule example 2", "description": "L'H\u00f4pital's Rule Example 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FJo18AwLfuI.mp4/FJo18AwLfuI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FJo18AwLfuI.mp4/FJo18AwLfuI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FJo18AwLfuI.m3u8/FJo18AwLfuI.m3u8"}, "slug": "l-hopital-s-rule-example-2", "video_id": "FJo18AwLfuI", "youtube_id": "FJo18AwLfuI", "readable_id": "l-hopital-s-rule-example-2"}, "a2Ia_ZlUCaQ": {"duration": 461, "path": "khan/math/differential-calculus/limits_topic/limits-infinity/limits-and-infinity/", "keywords": "", "id": "a2Ia_ZlUCaQ", "title": "Limits and infinity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a2Ia_ZlUCaQ.mp4/a2Ia_ZlUCaQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a2Ia_ZlUCaQ.mp4/a2Ia_ZlUCaQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a2Ia_ZlUCaQ.m3u8/a2Ia_ZlUCaQ.m3u8"}, "slug": "limits-and-infinity", "video_id": "a2Ia_ZlUCaQ", "youtube_id": "a2Ia_ZlUCaQ", "readable_id": "limits-and-infinity"}, "dt-2AanNQrc": {"duration": 167, "path": "khan/test-prep/mcat/individuals-and-society/social-interactions/status/", "keywords": "", "id": "dt-2AanNQrc", "title": "Status", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dt-2AanNQrc.mp4/dt-2AanNQrc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dt-2AanNQrc.mp4/dt-2AanNQrc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dt-2AanNQrc.m3u8/dt-2AanNQrc.m3u8"}, "slug": "status", "video_id": "dt-2AanNQrc", "youtube_id": "dt-2AanNQrc", "readable_id": "status"}, "zxy4KAiSPIc": {"duration": 92, "path": "khan/math/basic-geo/basic-geo-coordinate-plane/basic-geo-shapes-on-a-plane/constructing-polygon-on-coordinate-plane-example/", "keywords": "", "id": "zxy4KAiSPIc", "title": "Drawing a quadrilateral on the coordinate plane example", "description": "Sal draws a quadrilateral on the coordinate plane using the coordinates of its vertices.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zxy4KAiSPIc.mp4/zxy4KAiSPIc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zxy4KAiSPIc.mp4/zxy4KAiSPIc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zxy4KAiSPIc.m3u8/zxy4KAiSPIc.m3u8"}, "slug": "constructing-polygon-on-coordinate-plane-example", "video_id": "zxy4KAiSPIc", "youtube_id": "zxy4KAiSPIc", "readable_id": "constructing-polygon-on-coordinate-plane-example"}, "e_WWO2O5Nb8": {"duration": 781, "path": "khan/test-prep/mcat/chemical-processes/carbohydrates-5d/carbohydrates-di-and-polysaccharides/", "keywords": "", "id": "e_WWO2O5Nb8", "title": "Carbohydrates- di and polysaccharides", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e_WWO2O5Nb8.mp4/e_WWO2O5Nb8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e_WWO2O5Nb8.mp4/e_WWO2O5Nb8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e_WWO2O5Nb8.m3u8/e_WWO2O5Nb8.m3u8"}, "slug": "carbohydrates-di-and-polysaccharides", "video_id": "e_WWO2O5Nb8", "youtube_id": "e_WWO2O5Nb8", "readable_id": "carbohydrates-di-and-polysaccharides"}, "9IUEk9fn2Vs": {"duration": 458, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/old-school-equations/algebra-linear-equations-4/", "keywords": "algebra, CC_7_EE_1, CC_8_EE_7_b", "id": "9IUEk9fn2Vs", "title": "Algebra: Linear equations 4", "description": "Solving linear equations with variable expressions in the denominators of fractions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9IUEk9fn2Vs.mp4/9IUEk9fn2Vs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9IUEk9fn2Vs.mp4/9IUEk9fn2Vs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9IUEk9fn2Vs.m3u8/9IUEk9fn2Vs.m3u8"}, "slug": "algebra-linear-equations-4", "video_id": "9IUEk9fn2Vs", "youtube_id": "9IUEk9fn2Vs", "readable_id": "algebra-linear-equations-4"}, "uzmLXIuAspQ": {"duration": 400, "path": "khan/partner-content/wi-phi/metaphys-epistemology/will-to-believe/", "keywords": "", "id": "uzmLXIuAspQ", "title": "Epistemology: The Will to Believe", "description": "Tom asks whether it is moral to believe something even when you have no evidence that it is true. He discusses a classic debate on that subject, between philosophers William James and William Clifford.\n\nSpeaker: Dr. Thomas Donaldson, Assistant Professor of Philosophy, Stanford University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uzmLXIuAspQ.mp4/uzmLXIuAspQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uzmLXIuAspQ.mp4/uzmLXIuAspQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uzmLXIuAspQ.m3u8/uzmLXIuAspQ.m3u8"}, "slug": "will-to-believe", "video_id": "uzmLXIuAspQ", "youtube_id": "uzmLXIuAspQ", "readable_id": "will-to-believe"}, "v7ZWTZ9NgU4": {"duration": 527, "path": "khan/economics-finance-domain/macroeconomics/inflation-topic/phillips-curve-tutorial/phillips-curve/", "keywords": "macroeconomics", "id": "v7ZWTZ9NgU4", "title": "Phillips curve", "description": "The observation that inflation and unemployment tend to be inversely correlated", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v7ZWTZ9NgU4.mp4/v7ZWTZ9NgU4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v7ZWTZ9NgU4.mp4/v7ZWTZ9NgU4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v7ZWTZ9NgU4.m3u8/v7ZWTZ9NgU4.m3u8"}, "slug": "phillips-curve", "video_id": "v7ZWTZ9NgU4", "youtube_id": "v7ZWTZ9NgU4", "readable_id": "phillips-curve"}, "mAT8MLB3XpA": {"duration": 53, "path": "khan/partner-content/pixar/crowds/crowds2/combinatorics7/", "keywords": "", "id": "mAT8MLB3XpA", "title": "2. Snake bots", "description": "Let's build some snake to get us thinking about permutations.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mAT8MLB3XpA.mp4/mAT8MLB3XpA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mAT8MLB3XpA.mp4/mAT8MLB3XpA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mAT8MLB3XpA.m3u8/mAT8MLB3XpA.m3u8"}, "slug": "combinatorics7", "video_id": "mAT8MLB3XpA", "youtube_id": "mAT8MLB3XpA", "readable_id": "combinatorics7"}, "RGMcswR8DnY": {"duration": 452, "path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/fractional-reserve-banking-tut/full-reserve-banking/", "keywords": "macroeconomics", "id": "RGMcswR8DnY", "title": "Full reserve banking", "description": "Overview of full reserve banking in comparison to fractional reserve banking", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RGMcswR8DnY.mp4/RGMcswR8DnY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RGMcswR8DnY.mp4/RGMcswR8DnY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RGMcswR8DnY.m3u8/RGMcswR8DnY.m3u8"}, "slug": "full-reserve-banking", "video_id": "RGMcswR8DnY", "youtube_id": "RGMcswR8DnY", "readable_id": "full-reserve-banking"}, "8zrJxuVW3u4": {"duration": 532, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/new-perspective-on-the-heart/", "keywords": "", "id": "8zrJxuVW3u4", "title": "New perspective on the heart", "description": "Take a look at the heart in cross section, looking down at it from the top! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8zrJxuVW3u4.mp4/8zrJxuVW3u4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8zrJxuVW3u4.mp4/8zrJxuVW3u4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8zrJxuVW3u4.m3u8/8zrJxuVW3u4.m3u8"}, "slug": "new-perspective-on-the-heart", "video_id": "8zrJxuVW3u4", "youtube_id": "8zrJxuVW3u4", "readable_id": "new-perspective-on-the-heart"}, "WYI4u3beRdM": {"duration": 606, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/rands/adieu-composer-and-his-work/", "keywords": "", "id": "WYI4u3beRdM", "title": "Adieu: The composer and his work", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WYI4u3beRdM.mp4/WYI4u3beRdM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WYI4u3beRdM.mp4/WYI4u3beRdM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WYI4u3beRdM.m3u8/WYI4u3beRdM.m3u8"}, "slug": "adieu-composer-and-his-work", "video_id": "WYI4u3beRdM", "youtube_id": "WYI4u3beRdM", "readable_id": "adieu-composer-and-his-work"}, "_HJljJuVHLw": {"duration": 658, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-deducing-angle-measures/", "keywords": "geometry, angles, deduction", "id": "_HJljJuVHLw", "title": "CA Geometry: Deducing angle measures", "description": "46-50, deducing the measure of angles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_HJljJuVHLw.mp4/_HJljJuVHLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_HJljJuVHLw.mp4/_HJljJuVHLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_HJljJuVHLw.m3u8/_HJljJuVHLw.m3u8"}, "slug": "ca-geometry-deducing-angle-measures", "video_id": "_HJljJuVHLw", "youtube_id": "_HJljJuVHLw", "readable_id": "ca-geometry-deducing-angle-measures"}, "obts_JDS6_Q": {"duration": 816, "path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverting-matrices-part-3/", "keywords": "gauss, jordan, reduced, row, echelon, elimination, matrix, inverse", "id": "obts_JDS6_Q", "title": "Classic video on inverting a 3x3 matrix part 2", "description": "Using Gauss-Jordan elimination to invert a 3x3 matrix.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/obts_JDS6_Q.mp4/obts_JDS6_Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/obts_JDS6_Q.mp4/obts_JDS6_Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/obts_JDS6_Q.m3u8/obts_JDS6_Q.m3u8"}, "slug": "inverting-matrices-part-3", "video_id": "obts_JDS6_Q", "youtube_id": "obts_JDS6_Q", "readable_id": "inverting-matrices-part-3"}, "jBu5M0gXGos": {"duration": 254, "path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/schizotypal-personality-disorder/", "keywords": "Personality Disorder (Disease Or Medical Condition),Schizotypal Personality Disorder (Disease Or Medical Condition),Mental Illness (Disease Or Medical Condition),Health (Industry)", "id": "jBu5M0gXGos", "title": "Schizotypal personality disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jBu5M0gXGos.mp4/jBu5M0gXGos.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jBu5M0gXGos.mp4/jBu5M0gXGos.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jBu5M0gXGos.m3u8/jBu5M0gXGos.m3u8"}, "slug": "schizotypal-personality-disorder", "video_id": "jBu5M0gXGos", "youtube_id": "jBu5M0gXGos", "readable_id": "schizotypal-personality-disorder"}, "R-Qu3QWOEiA": {"duration": 435, "path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/shell-method-for-rotating-around-horizontal-line/", "keywords": "", "id": "R-Qu3QWOEiA", "title": "Shell method for rotating around horizontal line", "description": "Example showing how to find the volume of a solid of revolution (constructed by rotating around the x-axis) using the shell method (this could have been done with the disk method as well).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R-Qu3QWOEiA.mp4/R-Qu3QWOEiA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R-Qu3QWOEiA.mp4/R-Qu3QWOEiA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R-Qu3QWOEiA.m3u8/R-Qu3QWOEiA.m3u8"}, "slug": "shell-method-for-rotating-around-horizontal-line", "video_id": "R-Qu3QWOEiA", "youtube_id": "R-Qu3QWOEiA", "readable_id": "shell-method-for-rotating-around-horizontal-line"}, "3ROWXs3jtQU": {"duration": 837, "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/mixtures-and-solutions/suspensions-colloids-and-solutions/", "keywords": "chemistry, mixture, Molarity, molality", "id": "3ROWXs3jtQU", "title": "Suspensions, colloids and solutions", "description": "Suspensions, colloids and solutions. The difference between molarity and molality.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3ROWXs3jtQU.mp4/3ROWXs3jtQU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3ROWXs3jtQU.mp4/3ROWXs3jtQU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3ROWXs3jtQU.m3u8/3ROWXs3jtQU.m3u8"}, "slug": "suspensions-colloids-and-solutions", "video_id": "3ROWXs3jtQU", "youtube_id": "3ROWXs3jtQU", "readable_id": "suspensions-colloids-and-solutions"}, "4tWFdI7DkJ4": {"duration": 179, "path": "khan/math/integral-calculus/solid_revolution_topic/area-polar-graphs/calculator-integral/", "keywords": "", "id": "4tWFdI7DkJ4", "title": "Evaluating definite integral with calculator", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4tWFdI7DkJ4.mp4/4tWFdI7DkJ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4tWFdI7DkJ4.mp4/4tWFdI7DkJ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4tWFdI7DkJ4.m3u8/4tWFdI7DkJ4.m3u8"}, "slug": "calculator-integral", "video_id": "4tWFdI7DkJ4", "youtube_id": "4tWFdI7DkJ4", "readable_id": "calculator-integral"}, "7X1_3i9DimY": {"duration": 517, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/tchaikovsky-4th-analysis/pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-4/", "keywords": "", "id": "7X1_3i9DimY", "title": "Pyotr Ilyich Tchaikovsky: Symphony No.4, analysis by Gerard Schwarz (part 4)", "description": "Watch te full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7X1_3i9DimY.mp4/7X1_3i9DimY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7X1_3i9DimY.mp4/7X1_3i9DimY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7X1_3i9DimY.m3u8/7X1_3i9DimY.m3u8"}, "slug": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-4", "video_id": "7X1_3i9DimY", "youtube_id": "7X1_3i9DimY", "readable_id": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-4"}, "kRikHc8U8zI": {"duration": 232, "path": "khan/test-prep/ap-art-history/africa-ap/ikenga/", "keywords": "Igbo,Ikenga,Ibo,Nigeria (Country),Art History (Field Of Study),smarthistory,Africa (Continent)", "id": "kRikHc8U8zI", "title": "Ikenga (Igbo Peoples)", "description": "Ikenga, Igbo Peoples, Nigeria, wood (University of Pennsylvania Museum of Archaeology and Anthropology) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kRikHc8U8zI.mp4/kRikHc8U8zI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kRikHc8U8zI.mp4/kRikHc8U8zI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kRikHc8U8zI.m3u8/kRikHc8U8zI.m3u8"}, "slug": "ikenga", "video_id": "kRikHc8U8zI", "youtube_id": "kRikHc8U8zI", "readable_id": "ikenga"}, "CJrVOf_3dN0": {"duration": 689, "path": "khan/math/geometry/congruence/triangle-congruence/congruent-triangles-and-sss/", "keywords": "side, congruence", "id": "CJrVOf_3dN0", "title": "Congruent triangles and the SSS postulate/criterion", "description": "Sal explains what it means for triangles to be congruent and what is a postulate/axiom. He also presents the SSS congruence postulate/criterion and its justification.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CJrVOf_3dN0.mp4/CJrVOf_3dN0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CJrVOf_3dN0.mp4/CJrVOf_3dN0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CJrVOf_3dN0.m3u8/CJrVOf_3dN0.m3u8"}, "slug": "congruent-triangles-and-sss", "video_id": "CJrVOf_3dN0", "youtube_id": "CJrVOf_3dN0", "readable_id": "congruent-triangles-and-sss"}, "ozHYnzvzoIc": {"duration": 152, "path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/mars-global-surveyor/", "keywords": "", "id": "ozHYnzvzoIc", "title": "Mars global surveyor", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ozHYnzvzoIc.mp4/ozHYnzvzoIc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ozHYnzvzoIc.mp4/ozHYnzvzoIc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ozHYnzvzoIc.m3u8/ozHYnzvzoIc.m3u8"}, "slug": "mars-global-surveyor", "video_id": "ozHYnzvzoIc", "youtube_id": "ozHYnzvzoIc", "readable_id": "mars-global-surveyor"}, "6lH7zWK_SAg": {"duration": 220, "path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/fra-angelico-the-annunciation-and-life-of-the-virgin-in-the-predella-c-1426/", "keywords": "fra Angelico, Prado, art history, smarthistory, renaissance, florence", "id": "6lH7zWK_SAg", "title": "Fra Angelico, The Annunciation (Prado)", "description": "Fra Angelico, The Annunciation and Life of the Virgin (in the predella), c. 1426, tempera on wood, 194 x 194 cm (Museo del Prado, Madrid) Speakers: Dr. Beth Harris and Dr. Steven Zucker\nThe Annunciation is described in the Gospel According to Luke 1:26 - 38.\u00a0\nBelow is the King James translation:\n\n26\u00a0And in the sixth month the angel Gabriel was sent from God unto a city of Galilee, named Nazareth,\u00a027\u00a0To a virgin espoused to a man whose name was Joseph, of the house of David; and the virgin's name [was] Mary.\u00a028\u00a0And the angel came in unto her, and said, Hail, [thou that art] highly favoured, the Lord [is] with thee: blessed [art] thou among women.\u00a029\u00a0And when she saw [him], she was troubled at his saying, and cast in her mind what manner of salutation this should be.\u00a030\u00a0And the angel said unto her, Fear not, Mary: for thou hast found favour with God.\u00a031\u00a0And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS.\u00a032\u00a0He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David:\u00a033\u00a0And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.\u00a034\u00a0Then said Mary unto the angel, How shall this be, seeing I know not a man?\u00a035\u00a0And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.\u00a036\u00a0And, behold, thy cousin Elisabeth, she hath also conceived a son in her old age: and this is the sixth month with her, who was called barren.\u00a037\u00a0For with God nothing shall be impossible.\u00a038\u00a0And Mary said, Behold the handmaid of the Lord; be it unto me according to thy word. And the angel departed from her.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6lH7zWK_SAg.mp4/6lH7zWK_SAg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6lH7zWK_SAg.mp4/6lH7zWK_SAg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6lH7zWK_SAg.m3u8/6lH7zWK_SAg.m3u8"}, "slug": "fra-angelico-the-annunciation-and-life-of-the-virgin-in-the-predella-c-1426", "video_id": "6lH7zWK_SAg", "youtube_id": "6lH7zWK_SAg", "readable_id": "fra-angelico-the-annunciation-and-life-of-the-virgin-in-the-predella-c-1426"}, "KBsOwZRKzcE": {"duration": 360, "path": "khan/test-prep/mcat/social-inequality/social-class/global-inequality/", "keywords": "", "id": "KBsOwZRKzcE", "title": "Global inequality", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KBsOwZRKzcE.mp4/KBsOwZRKzcE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KBsOwZRKzcE.mp4/KBsOwZRKzcE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KBsOwZRKzcE.m3u8/KBsOwZRKzcE.m3u8"}, "slug": "global-inequality", "video_id": "KBsOwZRKzcE", "youtube_id": "KBsOwZRKzcE", "readable_id": "global-inequality"}, "4VICS9cIugo": {"duration": 407, "path": "khan/partner-content/big-history-project/what-is-big-history/welcome-to-big-history/bhp-10what-is-big-history/", "keywords": "", "id": "4VICS9cIugo", "title": "What Is Big History?", "description": "We hear David Christian\u2019s explanation of Big History's 13.8-billion-year timeline and multidisciplinary approach.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4VICS9cIugo.mp4/4VICS9cIugo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4VICS9cIugo.mp4/4VICS9cIugo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4VICS9cIugo.m3u8/4VICS9cIugo.m3u8"}, "slug": "bhp-10what-is-big-history", "video_id": "4VICS9cIugo", "youtube_id": "4VICS9cIugo", "readable_id": "bhp-10what-is-big-history"}, "6A1QWaP7cBo": {"duration": 133, "path": "khan/partner-content/exploratorium/light-and-color/colored-shadows/build-your-own-colored-shadows-materials-steps/", "keywords": "", "id": "6A1QWaP7cBo", "title": "Build your own colored shadows: Materials & steps", "description": "Here's everything you'll need to build your own colored shadows.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6A1QWaP7cBo.mp4/6A1QWaP7cBo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6A1QWaP7cBo.mp4/6A1QWaP7cBo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6A1QWaP7cBo.m3u8/6A1QWaP7cBo.m3u8"}, "slug": "build-your-own-colored-shadows-materials-steps", "video_id": "6A1QWaP7cBo", "youtube_id": "6A1QWaP7cBo", "readable_id": "build-your-own-colored-shadows-materials-steps"}, "knv4fNNoEG8": {"duration": 710, "path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/how-do-things-move-across-a-cell-membrane/", "keywords": "", "id": "knv4fNNoEG8", "title": "How do things move across a cell membrane?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/knv4fNNoEG8.mp4/knv4fNNoEG8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/knv4fNNoEG8.mp4/knv4fNNoEG8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/knv4fNNoEG8.m3u8/knv4fNNoEG8.m3u8"}, "slug": "how-do-things-move-across-a-cell-membrane", "video_id": "knv4fNNoEG8", "youtube_id": "knv4fNNoEG8", "readable_id": "how-do-things-move-across-a-cell-membrane"}, "GoRhRJXp0j8": {"duration": 954, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/what-is-a-uri/", "keywords": "", "id": "GoRhRJXp0j8", "title": "What is an upper respiratory infection (URI)?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GoRhRJXp0j8.mp4/GoRhRJXp0j8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GoRhRJXp0j8.mp4/GoRhRJXp0j8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GoRhRJXp0j8.m3u8/GoRhRJXp0j8.m3u8"}, "slug": "what-is-a-uri", "video_id": "GoRhRJXp0j8", "youtube_id": "GoRhRJXp0j8", "readable_id": "what-is-a-uri"}, "zPjbiP66-6M": {"duration": 158, "path": "khan/humanities/art-history-basics/artists-materials-techniques/ceramics-glass/ancient-and-byzantine-mosaic-materials/", "keywords": "", "id": "zPjbiP66-6M", "title": "Ancient and Byzantine mosaic materials", "description": "A video from The Art Institute of Chicago", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zPjbiP66-6M.mp4/zPjbiP66-6M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zPjbiP66-6M.mp4/zPjbiP66-6M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zPjbiP66-6M.m3u8/zPjbiP66-6M.m3u8"}, "slug": "ancient-and-byzantine-mosaic-materials", "video_id": "zPjbiP66-6M", "youtube_id": "zPjbiP66-6M", "readable_id": "ancient-and-byzantine-mosaic-materials"}, "qCvV11R2lgg": {"duration": 502, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/ischemic-stroke/", "keywords": "", "id": "qCvV11R2lgg", "title": "Ischemic stroke", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qCvV11R2lgg.mp4/qCvV11R2lgg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qCvV11R2lgg.mp4/qCvV11R2lgg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qCvV11R2lgg.m3u8/qCvV11R2lgg.m3u8"}, "slug": "ischemic-stroke", "video_id": "qCvV11R2lgg", "youtube_id": "qCvV11R2lgg", "readable_id": "ischemic-stroke"}, "q8olT3TyHm8": {"duration": 864, "path": "khan/partner-content/brookings-institution/introduction-to-healthcare/medicare/", "keywords": "", "id": "q8olT3TyHm8", "title": "Medicare", "description": "Medicare is the federal health insurance program for the elderly and disabled, but many people might be confused about how it works and how it is funded. This video explains the history, structure, and financing of this program.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q8olT3TyHm8.mp4/q8olT3TyHm8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q8olT3TyHm8.mp4/q8olT3TyHm8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q8olT3TyHm8.m3u8/q8olT3TyHm8.m3u8"}, "slug": "medicare", "video_id": "q8olT3TyHm8", "youtube_id": "q8olT3TyHm8", "readable_id": "medicare"}, "DMd9mTyzj6k": {"duration": 227, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/mergers-acquisitions/acquisitions-with-shares/", "keywords": "shares, stocks, capital, markets, finance", "id": "DMd9mTyzj6k", "title": "Acquisitions with shares", "description": "Mechanics of a share-based acquisition", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DMd9mTyzj6k.mp4/DMd9mTyzj6k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DMd9mTyzj6k.mp4/DMd9mTyzj6k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DMd9mTyzj6k.m3u8/DMd9mTyzj6k.m3u8"}, "slug": "acquisitions-with-shares", "video_id": "DMd9mTyzj6k", "youtube_id": "DMd9mTyzj6k", "readable_id": "acquisitions-with-shares"}, "HVuyK_vIMfc": {"duration": 273, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/mary-cassatt-in-the-loge-1878/", "keywords": "Mary Cassatt, Cassatt, In the Loge, Loge, 1878, Museum of Fine Arts, Boston, MFA, Paris, Opera, Garnier, opera glasses, Second Empire, Impressionism, art, painting, French, American, art history, smarthistory, Khan Academy, Google Art Project, OER", "id": "HVuyK_vIMfc", "title": "Cassatt, In the Loge", "description": "Mary Cassatt, In the Loge, 1878, oil on canvas, 81.28 x 66.04 cm / 32 x 26 inches (Museum of Fine Arts, Boston), speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nIn nineteenth century France, the gaze of the observer\u2014whether on Napoleon's grand new boulevards or in the opera\u2014was very much structured by issues of economic status. Mary Cassatt's remarkable painting In the Loge (c. 1878-79) clearly shows the complex relationship between the gaze, public spectacle, gender, and class privilege.\n\nCassatt was a wealthy American artist who had adopted the style of the Impressionists while living in Paris. Here she depicts a fashionable upper-class woman in a box seat at the Paris opera (as it happens, the sitter is Cassatt's sister, Lydia). Lydia is shown holding opera glasses up to her eyes; but instead of tilting them down, as she would if she were watching the performance below, her gaze is level. She peers straight across the chamber perhaps at another member of the audience. Look closely and you will notice that, in turn, and in one of the boxes across the room, a gentleman is gazing at her. Lydia is then, in a sense, caught between his gaze and ours even as she spies another.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HVuyK_vIMfc.mp4/HVuyK_vIMfc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HVuyK_vIMfc.mp4/HVuyK_vIMfc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HVuyK_vIMfc.m3u8/HVuyK_vIMfc.m3u8"}, "slug": "mary-cassatt-in-the-loge-1878", "video_id": "HVuyK_vIMfc", "youtube_id": "HVuyK_vIMfc", "readable_id": "mary-cassatt-in-the-loge-1878"}, "6yrPU8rYOhs": {"duration": 923, "path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/preimage-and-kernel-example/", "keywords": "preimage, kernel", "id": "6yrPU8rYOhs", "title": "Preimage and kernel example", "description": "Example involving the preimage of a set under a transformation. Definition of kernel of a transformation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6yrPU8rYOhs.mp4/6yrPU8rYOhs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6yrPU8rYOhs.mp4/6yrPU8rYOhs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6yrPU8rYOhs.m3u8/6yrPU8rYOhs.m3u8"}, "slug": "preimage-and-kernel-example", "video_id": "6yrPU8rYOhs", "youtube_id": "6yrPU8rYOhs", "readable_id": "preimage-and-kernel-example"}, "S4oOSgTj9C8": {"duration": 642, "path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/calculus-bc-2008-2-b-c/", "keywords": "Calculus", "id": "S4oOSgTj9C8", "title": "Calculus BC 2008 2 b &c", "description": "Parts 2b and 2c of the 2008 BC exam (free response)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S4oOSgTj9C8.mp4/S4oOSgTj9C8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S4oOSgTj9C8.mp4/S4oOSgTj9C8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S4oOSgTj9C8.m3u8/S4oOSgTj9C8.m3u8"}, "slug": "calculus-bc-2008-2-b-c", "video_id": "S4oOSgTj9C8", "youtube_id": "S4oOSgTj9C8", "readable_id": "calculus-bc-2008-2-b-c"}, "c-wtvEdEoVs": {"duration": 325, "path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/simplifying-cube-roots/", "keywords": "u16_l1_t2_we3, Simplifying, Cube, Roots", "id": "c-wtvEdEoVs", "title": "How to simplify a cube root expression with multiple variables (example)", "description": "Sal shows how to simplify\u00a0\u221b(27a^2b^5c^3).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/c-wtvEdEoVs.mp4/c-wtvEdEoVs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/c-wtvEdEoVs.mp4/c-wtvEdEoVs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/c-wtvEdEoVs.m3u8/c-wtvEdEoVs.m3u8"}, "slug": "simplifying-cube-roots", "video_id": "c-wtvEdEoVs", "youtube_id": "c-wtvEdEoVs", "readable_id": "simplifying-cube-roots"}, "Ya-3XHBWDqs": {"duration": 574, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/muscle-stretch-reflex/", "keywords": "MCAT", "id": "Ya-3XHBWDqs", "title": "Muscle stretch reflex", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ya-3XHBWDqs.mp4/Ya-3XHBWDqs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ya-3XHBWDqs.mp4/Ya-3XHBWDqs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ya-3XHBWDqs.m3u8/Ya-3XHBWDqs.m3u8"}, "slug": "muscle-stretch-reflex", "video_id": "Ya-3XHBWDqs", "youtube_id": "Ya-3XHBWDqs", "readable_id": "muscle-stretch-reflex"}, "QYOieJuzDr4": {"duration": 217, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-more-fewer-100/starfish-rulers/", "keywords": "", "id": "QYOieJuzDr4", "title": "Starfish rulers", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QYOieJuzDr4.mp4/QYOieJuzDr4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QYOieJuzDr4.mp4/QYOieJuzDr4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QYOieJuzDr4.m3u8/QYOieJuzDr4.m3u8"}, "slug": "starfish-rulers", "video_id": "QYOieJuzDr4", "youtube_id": "QYOieJuzDr4", "readable_id": "starfish-rulers"}, "zR4OaoiNkA0": {"duration": 534, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/reduction-of-carboxylic-acids/", "keywords": "", "id": "zR4OaoiNkA0", "title": "Reduction of carboxylic acids", "description": "How to reduce carboxylic acids using lithium aluminum hydride (and borane)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zR4OaoiNkA0.mp4/zR4OaoiNkA0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zR4OaoiNkA0.mp4/zR4OaoiNkA0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zR4OaoiNkA0.m3u8/zR4OaoiNkA0.m3u8"}, "slug": "reduction-of-carboxylic-acids", "video_id": "zR4OaoiNkA0", "youtube_id": "zR4OaoiNkA0", "readable_id": "reduction-of-carboxylic-acids"}, "dl_9NC_J6yo": {"duration": 385, "path": "khan/math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers/powers-of-complex-numbers/", "keywords": "", "id": "dl_9NC_J6yo", "title": "Powers of complex numbers", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dl_9NC_J6yo.mp4/dl_9NC_J6yo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dl_9NC_J6yo.mp4/dl_9NC_J6yo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dl_9NC_J6yo.m3u8/dl_9NC_J6yo.m3u8"}, "slug": "powers-of-complex-numbers", "video_id": "dl_9NC_J6yo", "youtube_id": "dl_9NC_J6yo", "readable_id": "powers-of-complex-numbers"}, "LAUJuLEZ9HA": {"duration": 81, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-10/", "keywords": "", "id": "LAUJuLEZ9HA", "title": "10 Setting up an equation", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LAUJuLEZ9HA.mp4/LAUJuLEZ9HA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LAUJuLEZ9HA.mp4/LAUJuLEZ9HA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LAUJuLEZ9HA.m3u8/LAUJuLEZ9HA.m3u8"}, "slug": "2013-sat-practice-6-10", "video_id": "LAUJuLEZ9HA", "youtube_id": "LAUJuLEZ9HA", "readable_id": "2013-sat-practice-6-10"}, "7eutept5h0Q": {"duration": 662, "path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/electromagnetic-waves-and-the-electromagnetic-spectrum/", "keywords": "", "id": "7eutept5h0Q", "title": "Electromagnetic waves and the electromagnetic spectrum", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7eutept5h0Q.mp4/7eutept5h0Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7eutept5h0Q.mp4/7eutept5h0Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7eutept5h0Q.m3u8/7eutept5h0Q.m3u8"}, "slug": "electromagnetic-waves-and-the-electromagnetic-spectrum", "video_id": "7eutept5h0Q", "youtube_id": "7eutept5h0Q", "readable_id": "electromagnetic-waves-and-the-electromagnetic-spectrum"}, "A5lggKwX4Zw": {"duration": 239, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2009-may-3-16/", "keywords": "", "id": "A5lggKwX4Zw", "title": "16 Seating assignments", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A5lggKwX4Zw.mp4/A5lggKwX4Zw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A5lggKwX4Zw.mp4/A5lggKwX4Zw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A5lggKwX4Zw.m3u8/A5lggKwX4Zw.m3u8"}, "slug": "sat-2009-may-3-16", "video_id": "A5lggKwX4Zw", "youtube_id": "A5lggKwX4Zw", "readable_id": "sat-2009-may-3-16"}, "6mp-fBJNQmU": {"duration": 388, "path": "khan/humanities/art-1010/art-between-wars/surrealism1/salvador-dal-the-persistence-of-memory-1931/", "keywords": "", "id": "6mp-fBJNQmU", "title": "Dali, The Persistence of Memory", "description": "Salvador Dal\u00ed, The Persistence of Memory, 1931 (The Museum of Modern Art)\n\nSpeakers: Sal Khan & Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6mp-fBJNQmU.mp4/6mp-fBJNQmU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6mp-fBJNQmU.mp4/6mp-fBJNQmU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6mp-fBJNQmU.m3u8/6mp-fBJNQmU.m3u8"}, "slug": "salvador-dal-the-persistence-of-memory-1931", "video_id": "6mp-fBJNQmU", "youtube_id": "6mp-fBJNQmU", "readable_id": "salvador-dal-the-persistence-of-memory-1931"}, "bkNMM8uiMww": {"duration": 256, "path": "khan/humanities/renaissance-reformation/early-renaissance1/beginners-renaissance-florence/linear-perspective-brunelleschi-s-experiement/", "keywords": "brunelleschi, filippo brunelleschi, linear perspective, renaissance, italian renaissance, Leon Battista Alberti, John Berger, perspective, art, history, art history", "id": "bkNMM8uiMww", "title": "Linear Perspective: Brunelleschi's Experiment", "description": "An introduction to Filippo Brunelleschi's experiment regarding linear perspective, c. 1420, in front of the Baptistry in Florence", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bkNMM8uiMww.mp4/bkNMM8uiMww.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bkNMM8uiMww.mp4/bkNMM8uiMww.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bkNMM8uiMww.m3u8/bkNMM8uiMww.m3u8"}, "slug": "linear-perspective-brunelleschi-s-experiement", "video_id": "bkNMM8uiMww", "youtube_id": "bkNMM8uiMww", "readable_id": "linear-perspective-brunelleschi-s-experiement"}, "uXoh6vi6J5U": {"duration": 226, "path": "khan/math/recreational-math/vi-hart/pi-tau/are-shakespeare-s-plays-encoded-within-pi/", "keywords": "pi, pi day, shakespeare, sonnets, mathematics, normal numbers", "id": "uXoh6vi6J5U", "title": "Are Shakespeare's plays encoded within pi?", "description": "Special thanks to Toby (or not Toby) for playing Dog Hamlet. This cool website lets you search the first 200,000,000 digits of Pi. See if your phone number or encoded name is in there! http://www.angio.net/pi/piquery Seven Sonnets: Are Shakespeare's plays encoded within Pi? The truth is: we don't know, but we suspect They're somewhere in those digits.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uXoh6vi6J5U.mp4/uXoh6vi6J5U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uXoh6vi6J5U.mp4/uXoh6vi6J5U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uXoh6vi6J5U.m3u8/uXoh6vi6J5U.m3u8"}, "slug": "are-shakespeare-s-plays-encoded-within-pi", "video_id": "uXoh6vi6J5U", "youtube_id": "uXoh6vi6J5U", "readable_id": "are-shakespeare-s-plays-encoded-within-pi"}, "-9gl_HlsatI": {"duration": 147, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/philip-rosedale/kauffman-philip-rosedale2/", "keywords": "", "id": "-9gl_HlsatI", "title": "Philip Rosedale - Founder and Chairman of Second Life", "description": "Philip Rosedale, Founder and Chairman of Second Life, talks about the origins of his groundbreaking virtual world, and how patience was the key to making the company profitable.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-9gl_HlsatI.mp4/-9gl_HlsatI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-9gl_HlsatI.mp4/-9gl_HlsatI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-9gl_HlsatI.m3u8/-9gl_HlsatI.m3u8"}, "slug": "kauffman-philip-rosedale2", "video_id": "-9gl_HlsatI", "youtube_id": "-9gl_HlsatI", "readable_id": "kauffman-philip-rosedale2"}, "mLOj11nMxDk": {"duration": 122, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/concision-harder/", "keywords": "education,online learning,learning,lessons", "id": "mLOj11nMxDk", "title": "Writing: Concision, style, and tone \u2014 Harder example 1", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing concision.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mLOj11nMxDk.mp4/mLOj11nMxDk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mLOj11nMxDk.mp4/mLOj11nMxDk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mLOj11nMxDk.m3u8/mLOj11nMxDk.m3u8"}, "slug": "concision-harder", "video_id": "mLOj11nMxDk", "youtube_id": "mLOj11nMxDk", "readable_id": "concision-harder"}, "aSY8XPGChAU": {"duration": 627, "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/keynesian-cross-tutorial/keynesian-cross-and-the-multiplier/", "keywords": "macroeconomics, mps, mpc, marginal, propensity, save, consume", "id": "aSY8XPGChAU", "title": "Keynesian cross and the multiplier", "description": "More on shifting aggregate planned expenditures. Connecting to the multiplier", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aSY8XPGChAU.mp4/aSY8XPGChAU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aSY8XPGChAU.mp4/aSY8XPGChAU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aSY8XPGChAU.m3u8/aSY8XPGChAU.m3u8"}, "slug": "keynesian-cross-and-the-multiplier", "video_id": "aSY8XPGChAU", "youtube_id": "aSY8XPGChAU", "readable_id": "keynesian-cross-and-the-multiplier"}, "yqoljfiOYKY": {"duration": 110, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/items-series-harder/", "keywords": "education,online learning,learning,lessons", "id": "yqoljfiOYKY", "title": "Writing: Items in a series \u2014 Harder example", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing\u00a0items in a series.\u200b", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yqoljfiOYKY.mp4/yqoljfiOYKY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yqoljfiOYKY.mp4/yqoljfiOYKY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yqoljfiOYKY.m3u8/yqoljfiOYKY.m3u8"}, "slug": "items-series-harder", "video_id": "yqoljfiOYKY", "youtube_id": "yqoljfiOYKY", "readable_id": "items-series-harder"}, "TDHI-aieyfk": {"duration": 224, "path": "khan/math/differential-calculus/taking-derivatives/product_rule/derivatives-of-sin-x-cos-x-tan-x-e-x-and-ln-x/", "keywords": "", "id": "TDHI-aieyfk", "title": "Derivatives of sin x, cos x, tan x, e^x and ln x", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TDHI-aieyfk.mp4/TDHI-aieyfk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TDHI-aieyfk.mp4/TDHI-aieyfk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TDHI-aieyfk.m3u8/TDHI-aieyfk.m3u8"}, "slug": "derivatives-of-sin-x-cos-x-tan-x-e-x-and-ln-x", "video_id": "TDHI-aieyfk", "youtube_id": "TDHI-aieyfk", "readable_id": "derivatives-of-sin-x-cos-x-tan-x-e-x-and-ln-x"}, "XtJwkIacpi8": {"duration": 725, "path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/soccer-thiago/", "keywords": "Pythagorean theorem", "id": "XtJwkIacpi8", "title": "Thiago asks: How much time does a goalkeeper have to react to a penalty kick?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XtJwkIacpi8.mp4/XtJwkIacpi8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XtJwkIacpi8.mp4/XtJwkIacpi8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XtJwkIacpi8.m3u8/XtJwkIacpi8.m3u8"}, "slug": "soccer-thiago", "video_id": "XtJwkIacpi8", "youtube_id": "XtJwkIacpi8", "readable_id": "soccer-thiago"}, "b9NZvAhvIwQ": {"duration": 506, "path": "khan/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis/synthesis-of-substituted-benzene-rings-ii/", "keywords": "", "id": "b9NZvAhvIwQ", "title": "Synthesis of substituted benzene rings II", "description": "Synthesis practice problems", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b9NZvAhvIwQ.mp4/b9NZvAhvIwQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b9NZvAhvIwQ.mp4/b9NZvAhvIwQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b9NZvAhvIwQ.m3u8/b9NZvAhvIwQ.m3u8"}, "slug": "synthesis-of-substituted-benzene-rings-ii", "video_id": "b9NZvAhvIwQ", "youtube_id": "b9NZvAhvIwQ", "readable_id": "synthesis-of-substituted-benzene-rings-ii"}, "3oG69aK0McM": {"duration": 611, "path": "khan/partner-content/wi-phi/the-history-of-philosophy/locke-personal-identity-part-3/", "keywords": "", "id": "3oG69aK0McM", "title": "Early Modern: Locke on Personal Identity, Part 3", "description": "Part 3\u00a0of 3. What makes you the same person as the little kid growing up a number of years ago? \u00a0Is the identity of a person tied to the persistence of a body or a soul or something else entirely? \u00a0Can we even give\u00a0any explanation at all of the persistence of a person? \u00a0Michael Della Rocca (Yale University) explores some of the puzzles and problems of personal identity that arise from the revolutionary work of the philosopher John Locke.\n\nSpeaker: Dr. Michael Della Rocca,\u00a0Andrew Downey Orrick Professor of Philosophy, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3oG69aK0McM.mp4/3oG69aK0McM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3oG69aK0McM.mp4/3oG69aK0McM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3oG69aK0McM.m3u8/3oG69aK0McM.m3u8"}, "slug": "locke-personal-identity-part-3", "video_id": "3oG69aK0McM", "youtube_id": "3oG69aK0McM", "readable_id": "locke-personal-identity-part-3"}, "96ZEmUbnuU8": {"duration": 351, "path": "khan/math/algebra-basics/core-algebra-linear-equations-inequalities/ratios-core-algebra/writing-proportions/", "keywords": "algebra, math, proportions, ratios", "id": "96ZEmUbnuU8", "title": "Setting up proportions to solve word problems", "description": "Some examples of writing two ratios and setting them equal to each other to solve proportion word problems", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/96ZEmUbnuU8.mp4/96ZEmUbnuU8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/96ZEmUbnuU8.mp4/96ZEmUbnuU8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/96ZEmUbnuU8.m3u8/96ZEmUbnuU8.m3u8"}, "slug": "writing-proportions", "video_id": "96ZEmUbnuU8", "youtube_id": "96ZEmUbnuU8", "readable_id": "writing-proportions"}, "jnxA293u8cs": {"duration": 256, "path": "khan/humanities/renaissance-reformation/northern/cranach-altdorfer/lucas-cranach-the-elder-judith-with-the-head-of-holofernes-c-1530/", "keywords": "Cranach, Judith, GAP, Holofernes, Khan Academy, smarthistory, art history, Google Art Project, OER, painting, Lucas Cranach the Elder, 1530, Kunsthistorisches Museum, Vienna", "id": "jnxA293u8cs", "title": "Cranach the Elder, Judith with the Head of Holofernes", "description": "Lucas Cranach the Elder, Judith with the Head of Holofernes, c. 1530 (Kunsthistorisches Museum, Vienna)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jnxA293u8cs.mp4/jnxA293u8cs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jnxA293u8cs.mp4/jnxA293u8cs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jnxA293u8cs.m3u8/jnxA293u8cs.m3u8"}, "slug": "lucas-cranach-the-elder-judith-with-the-head-of-holofernes-c-1530", "video_id": "jnxA293u8cs", "youtube_id": "jnxA293u8cs", "readable_id": "lucas-cranach-the-elder-judith-with-the-head-of-holofernes-c-1530"}, "XUmB0reCB-U": {"duration": 429, "path": "khan/test-prep/mcat/chemical-processes/kinetics/half-life-of-a-second-order-reaction/", "keywords": "", "id": "XUmB0reCB-U", "title": "Half-life of a second-order reaction", "description": "Deriving half-life equation of a second-order reaction starting from the integrated rate law.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XUmB0reCB-U.mp4/XUmB0reCB-U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XUmB0reCB-U.mp4/XUmB0reCB-U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XUmB0reCB-U.m3u8/XUmB0reCB-U.m3u8"}, "slug": "half-life-of-a-second-order-reaction", "video_id": "XUmB0reCB-U", "youtube_id": "XUmB0reCB-U", "readable_id": "half-life-of-a-second-order-reaction"}, "NYEVx5QFavU": {"duration": 278, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-4-12/", "keywords": "", "id": "NYEVx5QFavU", "title": "12 Triangle angles", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NYEVx5QFavU.mp4/NYEVx5QFavU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NYEVx5QFavU.mp4/NYEVx5QFavU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NYEVx5QFavU.m3u8/NYEVx5QFavU.m3u8"}, "slug": "sat-2008-may-4-12", "video_id": "NYEVx5QFavU", "youtube_id": "NYEVx5QFavU", "readable_id": "sat-2008-may-4-12"}, "7qaxUhbiQUc": {"duration": 292, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/pierre-auguste-renoir-the-large-bathers-1884-87/", "keywords": "Pierre-Auguste Renoir, Renoir, Large Bathers, Bathers, 1884, 1887, Philadelphia Museum of Art, Philadelphia, Impressionism, Crisis of Impressionism, painting, French, art, art history, Khan Academy, Smarthistory, Google Art Project, OER", "id": "7qaxUhbiQUc", "title": "Renoir, The Large Bathers", "description": "Pierre-Auguste Renoir, The Large Bathers, 1884-87, oil on canvas, 46-3/8 x 67-1/4 inches / 117.8 x 170.8 cm (Philadelphia Museum of Art)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7qaxUhbiQUc.mp4/7qaxUhbiQUc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7qaxUhbiQUc.mp4/7qaxUhbiQUc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7qaxUhbiQUc.m3u8/7qaxUhbiQUc.m3u8"}, "slug": "pierre-auguste-renoir-the-large-bathers-1884-87", "video_id": "7qaxUhbiQUc", "youtube_id": "7qaxUhbiQUc", "readable_id": "pierre-auguste-renoir-the-large-bathers-1884-87"}, "gsu4gjrFApA": {"duration": 752, "path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/strong-acids-and-strong-bases/", "keywords": "", "id": "gsu4gjrFApA", "title": "Strong acids and strong bases", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gsu4gjrFApA.mp4/gsu4gjrFApA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gsu4gjrFApA.mp4/gsu4gjrFApA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gsu4gjrFApA.m3u8/gsu4gjrFApA.m3u8"}, "slug": "strong-acids-and-strong-bases", "video_id": "gsu4gjrFApA", "youtube_id": "gsu4gjrFApA", "readable_id": "strong-acids-and-strong-bases"}, "iUotrPxq2pU": {"duration": 269, "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/babylonian/towers-of-babel/", "keywords": "British Museum", "id": "iUotrPxq2pU", "title": "Towers of Babel", "description": "British Museum curator Irving Finkel \u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iUotrPxq2pU.mp4/iUotrPxq2pU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iUotrPxq2pU.mp4/iUotrPxq2pU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iUotrPxq2pU.m3u8/iUotrPxq2pU.m3u8"}, "slug": "towers-of-babel", "video_id": "iUotrPxq2pU", "youtube_id": "iUotrPxq2pU", "readable_id": "towers-of-babel"}, "NSPrIjA6T-c": {"duration": 722, "path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/intramolecular-aldol-condensation/", "keywords": "", "id": "NSPrIjA6T-c", "title": "Intramolecular aldol condensation", "description": "How to determine the product of an intramolecular aldol condensation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NSPrIjA6T-c.mp4/NSPrIjA6T-c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NSPrIjA6T-c.mp4/NSPrIjA6T-c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NSPrIjA6T-c.m3u8/NSPrIjA6T-c.m3u8"}, "slug": "intramolecular-aldol-condensation", "video_id": "NSPrIjA6T-c", "youtube_id": "NSPrIjA6T-c", "readable_id": "intramolecular-aldol-condensation"}, "8QYiN--_4-c": {"duration": 529, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic/heats-of-combustion-of-alkanes/", "keywords": "", "id": "8QYiN--_4-c", "title": "Heats of combustion of alkanes", "description": "How to use heats of combustion to compare the stability of isomeric alkanes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8QYiN--_4-c.mp4/8QYiN--_4-c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8QYiN--_4-c.mp4/8QYiN--_4-c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8QYiN--_4-c.m3u8/8QYiN--_4-c.m3u8"}, "slug": "heats-of-combustion-of-alkanes", "video_id": "8QYiN--_4-c", "youtube_id": "8QYiN--_4-c", "readable_id": "heats-of-combustion-of-alkanes"}, "AtbZZiSLemQ": {"duration": 413, "path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/limit-comparison-test-cor/", "keywords": "", "id": "AtbZZiSLemQ", "title": "Limit comparison test", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AtbZZiSLemQ.mp4/AtbZZiSLemQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AtbZZiSLemQ.mp4/AtbZZiSLemQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AtbZZiSLemQ.m3u8/AtbZZiSLemQ.m3u8"}, "slug": "limit-comparison-test-cor", "video_id": "AtbZZiSLemQ", "youtube_id": "AtbZZiSLemQ", "readable_id": "limit-comparison-test-cor"}, "02gVmoObrjM": {"duration": 327, "path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-6/", "keywords": "", "id": "02gVmoObrjM", "title": "Stokes' theorem proof part 6", "description": "More manipulating the integrals...", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/02gVmoObrjM.mp4/02gVmoObrjM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/02gVmoObrjM.mp4/02gVmoObrjM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/02gVmoObrjM.m3u8/02gVmoObrjM.m3u8"}, "slug": "stokes-theorem-proof-part-6", "video_id": "02gVmoObrjM", "youtube_id": "02gVmoObrjM", "readable_id": "stokes-theorem-proof-part-6"}, "h3lMANILkw0": {"duration": 719, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-2-a-bank-s-income-statement/", "keywords": "income, statement, balance, sheet, bank, credit, debt, savings, deposits", "id": "h3lMANILkw0", "title": "Banking 2: A bank's income statement", "description": "Introduction to the income statement of a bank (and to income statements in general).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h3lMANILkw0.mp4/h3lMANILkw0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h3lMANILkw0.mp4/h3lMANILkw0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h3lMANILkw0.m3u8/h3lMANILkw0.m3u8"}, "slug": "banking-2-a-bank-s-income-statement", "video_id": "h3lMANILkw0", "youtube_id": "h3lMANILkw0", "readable_id": "banking-2-a-bank-s-income-statement"}, "I-Or4bUAIfo": {"duration": 584, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/atomic-number-mass-number-and-isotopes/", "keywords": "", "id": "I-Or4bUAIfo", "title": "Atomic number, mass number, and isotopes", "description": "How to use the atomic number and the mass number to represent different isotopes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I-Or4bUAIfo.mp4/I-Or4bUAIfo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I-Or4bUAIfo.mp4/I-Or4bUAIfo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I-Or4bUAIfo.m3u8/I-Or4bUAIfo.m3u8"}, "slug": "atomic-number-mass-number-and-isotopes", "video_id": "I-Or4bUAIfo", "youtube_id": "I-Or4bUAIfo", "readable_id": "atomic-number-mass-number-and-isotopes"}, "jk3wNadYA7k": {"duration": 618, "path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/ambrogio-lorenzetti-s-palazzo-pubblico-frescos-allegory-and-effect-of-good-and-bad-government/", "keywords": "", "id": "jk3wNadYA7k", "title": "Ambrogio Lorenzetti, Palazzo Pubblico frescos: Allegory and effect of good and bad government", "description": "Ambrogio Lorenzetti, Allegory of Good Government, Effects of Good Government in the City and the Country, and Allegory and Effects of Bad Government in the City and the Country, Siena c. 1337-40, fresco, Sala della Pace (Hall of Peace) also know as the Sala dei Nove (the Hall of the Nine), 7.7 x 14.4 meters (room), Palazzo Pubblico, Siena\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nFor more information visit: http://smarthistory.khanacademy.org/the-allegories-and-effects-of-good-and-bad-government.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jk3wNadYA7k.mp4/jk3wNadYA7k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jk3wNadYA7k.mp4/jk3wNadYA7k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jk3wNadYA7k.m3u8/jk3wNadYA7k.m3u8"}, "slug": "ambrogio-lorenzetti-s-palazzo-pubblico-frescos-allegory-and-effect-of-good-and-bad-government", "video_id": "jk3wNadYA7k", "youtube_id": "jk3wNadYA7k", "readable_id": "ambrogio-lorenzetti-s-palazzo-pubblico-frescos-allegory-and-effect-of-good-and-bad-government"}, "m7qXvQvWlY4": {"duration": 277, "path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/constant-unit-elasticity/", "keywords": "elasticity, demand", "id": "m7qXvQvWlY4", "title": "Constant unit elasticity", "description": "What a demand curve with constant unit elasticity would look like", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m7qXvQvWlY4.mp4/m7qXvQvWlY4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m7qXvQvWlY4.mp4/m7qXvQvWlY4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m7qXvQvWlY4.m3u8/m7qXvQvWlY4.m3u8"}, "slug": "constant-unit-elasticity", "video_id": "m7qXvQvWlY4", "youtube_id": "m7qXvQvWlY4", "readable_id": "constant-unit-elasticity"}, "uWJRx-5n1yw": {"duration": 695, "path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/formation-of-alcohols-using-hydride-reducing-agents/", "keywords": "", "id": "uWJRx-5n1yw", "title": "Formation of alcohols using hydride reducing agents", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uWJRx-5n1yw.mp4/uWJRx-5n1yw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uWJRx-5n1yw.mp4/uWJRx-5n1yw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uWJRx-5n1yw.m3u8/uWJRx-5n1yw.m3u8"}, "slug": "formation-of-alcohols-using-hydride-reducing-agents", "video_id": "uWJRx-5n1yw", "youtube_id": "uWJRx-5n1yw", "readable_id": "formation-of-alcohols-using-hydride-reducing-agents"}, "iqeGTtyzQ1I": {"duration": 342, "path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/triangle-angle-example-3/", "keywords": "Triangle, Angle, Example, 3", "id": "iqeGTtyzQ1I", "title": "Triangle angle example 3", "description": "Multiple ways to solve for the angles of multiple triangles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iqeGTtyzQ1I.mp4/iqeGTtyzQ1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iqeGTtyzQ1I.mp4/iqeGTtyzQ1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iqeGTtyzQ1I.m3u8/iqeGTtyzQ1I.m3u8"}, "slug": "triangle-angle-example-3", "video_id": "iqeGTtyzQ1I", "youtube_id": "iqeGTtyzQ1I", "readable_id": "triangle-angle-example-3"}, "QNB9hnRfgdk": {"duration": 196, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/marc-ecko/kauffman-marc-ecko-2/", "keywords": "", "id": "QNB9hnRfgdk", "title": "Marc Ecko - Failures are lessons for future success", "description": "Marc Ecko, Founder of Ecko Unlimited, tells a story about how being an entrepreneur is always a learning opportunity, and how understanding your ? failure can lead to success.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QNB9hnRfgdk.mp4/QNB9hnRfgdk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QNB9hnRfgdk.mp4/QNB9hnRfgdk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QNB9hnRfgdk.m3u8/QNB9hnRfgdk.m3u8"}, "slug": "kauffman-marc-ecko-2", "video_id": "QNB9hnRfgdk", "youtube_id": "QNB9hnRfgdk", "readable_id": "kauffman-marc-ecko-2"}, "XdzcU5JbVcA": {"duration": 594, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/disc-method-rotation-around-horizontal-line/", "keywords": "", "id": "XdzcU5JbVcA", "title": "Disc method rotation around horizontal line", "description": "Solid of revolution constructing by rotating around line that is not an axis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XdzcU5JbVcA.mp4/XdzcU5JbVcA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XdzcU5JbVcA.mp4/XdzcU5JbVcA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XdzcU5JbVcA.m3u8/XdzcU5JbVcA.m3u8"}, "slug": "disc-method-rotation-around-horizontal-line", "video_id": "XdzcU5JbVcA", "youtube_id": "XdzcU5JbVcA", "readable_id": "disc-method-rotation-around-horizontal-line"}, "qSkpZswoZTc": {"duration": 63, "path": "khan/math/early-math/cc-early-math-add-sub-basics/cc-early-math-add-sub-word-problem-within-10/subtraction-word-problems-within-10/", "keywords": "", "id": "qSkpZswoZTc", "title": "Subtraction word problems within 10", "description": "Learn how to solve word problems by subtracting small numbers (numbers 10 or less).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qSkpZswoZTc.mp4/qSkpZswoZTc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qSkpZswoZTc.mp4/qSkpZswoZTc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qSkpZswoZTc.m3u8/qSkpZswoZTc.m3u8"}, "slug": "subtraction-word-problems-within-10", "video_id": "qSkpZswoZTc", "youtube_id": "qSkpZswoZTc", "readable_id": "subtraction-word-problems-within-10"}, "5coSaLCWzhA": {"duration": 66, "path": "khan/humanities/ancient-art-civilizations/greek-art/beginners-guide-greece/sprinters/", "keywords": "olympics, ancient greece,", "id": "5coSaLCWzhA", "title": "Sprinter on a vase from Rhodes and a bronze running girl", "description": "The greatest Olympic runner of all was Leonidas of Rhodes who won all three running events at each of the four successive Olympiads between 164 and 152 BC. Women competed in foot races at Olympia, but these were not part of the Olympic Games.\u00a0\u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5coSaLCWzhA.mp4/5coSaLCWzhA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5coSaLCWzhA.mp4/5coSaLCWzhA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5coSaLCWzhA.m3u8/5coSaLCWzhA.m3u8"}, "slug": "sprinters", "video_id": "5coSaLCWzhA", "youtube_id": "5coSaLCWzhA", "readable_id": "sprinters"}, "FNVvQ788wzk": {"duration": 879, "path": "khan/test-prep/mcat/organ-systems/hematologic-system/coagulation-cascade/", "keywords": "", "id": "FNVvQ788wzk", "title": "Coagulation cascade", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FNVvQ788wzk.mp4/FNVvQ788wzk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FNVvQ788wzk.mp4/FNVvQ788wzk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FNVvQ788wzk.m3u8/FNVvQ788wzk.m3u8"}, "slug": "coagulation-cascade", "video_id": "FNVvQ788wzk", "youtube_id": "FNVvQ788wzk", "readable_id": "coagulation-cascade"}, "d7rAlcNHDUI": {"duration": 121, "path": "khan/math/pre-algebra/rates-and-ratios/rates_tutorial/finding-unit-prices/", "keywords": "U04_L1_T1_we4, Finding, Unit, Prices, CC_6_RP_2, CC_6_RP_3", "id": "d7rAlcNHDUI", "title": "Solving unit price problem", "description": "Let's start by thinking about what percent really means. Once you understand this, other pieces will begin to fall into place.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d7rAlcNHDUI.mp4/d7rAlcNHDUI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d7rAlcNHDUI.mp4/d7rAlcNHDUI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d7rAlcNHDUI.m3u8/d7rAlcNHDUI.m3u8"}, "slug": "finding-unit-prices", "video_id": "d7rAlcNHDUI", "youtube_id": "d7rAlcNHDUI", "readable_id": "finding-unit-prices"}, "c-szOdzJiWM": {"duration": 111, "path": "khan/computing/computer-programming/html-css-js/html-css-js-intro/welcome-to-making-webpages-interactive/", "keywords": "", "id": "c-szOdzJiWM", "title": "Welcome to making webpages interactive", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/c-szOdzJiWM.mp4/c-szOdzJiWM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/c-szOdzJiWM.mp4/c-szOdzJiWM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/c-szOdzJiWM.m3u8/c-szOdzJiWM.m3u8"}, "slug": "welcome-to-making-webpages-interactive", "video_id": "c-szOdzJiWM", "youtube_id": "c-szOdzJiWM", "readable_id": "welcome-to-making-webpages-interactive"}, "QgVwzm3u3mc": {"duration": 726, "path": "khan/partner-content/big-history-project/solar-system-and-earth/earth-and-form-solar-system/bhp-how-did-earth-solar-system-form/", "keywords": "", "id": "QgVwzm3u3mc", "title": "How Did Earth and the Solar System Form?", "description": "New elements enabled new possibilities, creating conditions around stars that were just right for making planets.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QgVwzm3u3mc.mp4/QgVwzm3u3mc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QgVwzm3u3mc.mp4/QgVwzm3u3mc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QgVwzm3u3mc.m3u8/QgVwzm3u3mc.m3u8"}, "slug": "bhp-how-did-earth-solar-system-form", "video_id": "QgVwzm3u3mc", "youtube_id": "QgVwzm3u3mc", "readable_id": "bhp-how-did-earth-solar-system-form"}, "MsqqpO9R5Hc": {"duration": 272, "path": "khan/computing/computer-science/cryptography/modern-crypt/diffie-hellman-key-exchange-part-1/", "keywords": "diffie-hellman, public key, cryptography", "id": "MsqqpO9R5Hc", "title": "Public key cryptography: What is it?", "description": "Why do we need public key cryptography?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MsqqpO9R5Hc.mp4/MsqqpO9R5Hc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MsqqpO9R5Hc.mp4/MsqqpO9R5Hc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MsqqpO9R5Hc.m3u8/MsqqpO9R5Hc.m3u8"}, "slug": "diffie-hellman-key-exchange-part-1", "video_id": "MsqqpO9R5Hc", "youtube_id": "MsqqpO9R5Hc", "readable_id": "diffie-hellman-key-exchange-part-1"}, "gEGKvx1wlFg": {"duration": 296, "path": "khan/math/early-math/cc-early-math-add-sub-20/cc-early-math-equals-sign/equal-sign/", "keywords": "", "id": "gEGKvx1wlFg", "title": "Equal sign", "description": "Learn what the equals sign really means.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gEGKvx1wlFg.mp4/gEGKvx1wlFg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gEGKvx1wlFg.mp4/gEGKvx1wlFg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gEGKvx1wlFg.m3u8/gEGKvx1wlFg.m3u8"}, "slug": "equal-sign", "video_id": "gEGKvx1wlFg", "youtube_id": "gEGKvx1wlFg", "readable_id": "equal-sign"}, "9B8voIQl8BI": {"duration": 84, "path": "khan/college-admissions/wrapping-up/post-college-acceptance/making-the-transition/", "keywords": "", "id": "9B8voIQl8BI", "title": "Making the college transition", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9B8voIQl8BI.mp4/9B8voIQl8BI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9B8voIQl8BI.mp4/9B8voIQl8BI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9B8voIQl8BI.m3u8/9B8voIQl8BI.m3u8"}, "slug": "making-the-transition", "video_id": "9B8voIQl8BI", "youtube_id": "9B8voIQl8BI", "readable_id": "making-the-transition"}, "aKRDvSZ-igA": {"duration": 807, "path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/maxwell-s-demon/", "keywords": "thermodynamics, carnot, entropy, maxwell, demon", "id": "aKRDvSZ-igA", "title": "Maxwell's demon", "description": "Maxwell's Demon: A thought experiment that seems to defy the 2nd Law of Thermodynamics", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aKRDvSZ-igA.mp4/aKRDvSZ-igA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aKRDvSZ-igA.mp4/aKRDvSZ-igA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aKRDvSZ-igA.m3u8/aKRDvSZ-igA.m3u8"}, "slug": "maxwell-s-demon", "video_id": "aKRDvSZ-igA", "youtube_id": "aKRDvSZ-igA", "readable_id": "maxwell-s-demon"}, "462Y898PVn8": {"duration": 692, "path": "khan/partner-content/wi-phi/the-history-of-philosophy/locke-personal-identity-part-1/", "keywords": "", "id": "462Y898PVn8", "title": "Early Modern: Locke on Personal Identity, Part 1", "description": "Part 1 of 3. What makes you the same person as the little kid growing up a number of years ago? \u00a0Is the identity of a person tied to the persistence of a body or a soul or something else entirely? \u00a0Can we even give\u00a0any explanation at all of the persistence of a person? \u00a0Michael Della Rocca (Yale University) explores some of the puzzles and problems of personal identity that arise from the revolutionary work of the philosopher John Locke.\n\nSpeaker: Dr. Michael Della Rocca,\u00a0Andrew Downey Orrick Professor of Philosophy, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/462Y898PVn8.mp4/462Y898PVn8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/462Y898PVn8.mp4/462Y898PVn8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/462Y898PVn8.m3u8/462Y898PVn8.m3u8"}, "slug": "locke-personal-identity-part-1", "video_id": "462Y898PVn8", "youtube_id": "462Y898PVn8", "readable_id": "locke-personal-identity-part-1"}, "sILo6xYbsc0": {"duration": 291, "path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/social-perception-primacy-recency/", "keywords": "", "id": "sILo6xYbsc0", "title": "Social perception - Primacy recency", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sILo6xYbsc0.mp4/sILo6xYbsc0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sILo6xYbsc0.mp4/sILo6xYbsc0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sILo6xYbsc0.m3u8/sILo6xYbsc0.m3u8"}, "slug": "social-perception-primacy-recency", "video_id": "sILo6xYbsc0", "youtube_id": "sILo6xYbsc0", "readable_id": "social-perception-primacy-recency"}, "k8EfLFvUI5U": {"duration": 204, "path": "khan/math/algebra-basics/core-algebra-graphing-lines-slope/core-algebra-equation-of-a-line/equation-of-a-line-hairier-example/", "keywords": "u13, l2, t2, we, INT, Equation, of, Line, hairier, example", "id": "k8EfLFvUI5U", "title": "Equation of a line from fractional slope and point", "description": "u13 l2 t2 we INT Equation of a Line hairier example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/k8EfLFvUI5U.mp4/k8EfLFvUI5U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/k8EfLFvUI5U.mp4/k8EfLFvUI5U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/k8EfLFvUI5U.m3u8/k8EfLFvUI5U.m3u8"}, "slug": "equation-of-a-line-hairier-example", "video_id": "k8EfLFvUI5U", "youtube_id": "k8EfLFvUI5U", "readable_id": "equation-of-a-line-hairier-example"}, "swQgTqphZzE": {"duration": 305, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis/pertussis-vaccine/", "keywords": "", "id": "swQgTqphZzE", "title": "Pertussis vaccine", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/swQgTqphZzE.mp4/swQgTqphZzE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/swQgTqphZzE.mp4/swQgTqphZzE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/swQgTqphZzE.m3u8/swQgTqphZzE.m3u8"}, "slug": "pertussis-vaccine", "video_id": "swQgTqphZzE", "youtube_id": "swQgTqphZzE", "readable_id": "pertussis-vaccine"}, "H6ZNLD1AeM8": {"duration": 378, "path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/slope-of-a-secant-line-example-3/", "keywords": "", "id": "H6ZNLD1AeM8", "title": "Slope of a secant line example 3", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H6ZNLD1AeM8.mp4/H6ZNLD1AeM8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H6ZNLD1AeM8.mp4/H6ZNLD1AeM8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H6ZNLD1AeM8.m3u8/H6ZNLD1AeM8.m3u8"}, "slug": "slope-of-a-secant-line-example-3", "video_id": "H6ZNLD1AeM8", "youtube_id": "H6ZNLD1AeM8", "readable_id": "slope-of-a-secant-line-example-3"}, "M_5KYncYNyc": {"duration": 844, "path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/efficiency-of-a-carnot-engine/", "keywords": "thermodynamics, carnot, entropy", "id": "M_5KYncYNyc", "title": "Efficiency of a Carnot engine", "description": "Definition of efficiency for a heat engine. Efficiency of a Carnot Engine.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M_5KYncYNyc.mp4/M_5KYncYNyc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M_5KYncYNyc.mp4/M_5KYncYNyc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M_5KYncYNyc.m3u8/M_5KYncYNyc.m3u8"}, "slug": "efficiency-of-a-carnot-engine", "video_id": "M_5KYncYNyc", "youtube_id": "M_5KYncYNyc", "readable_id": "efficiency-of-a-carnot-engine"}, "Rcb7ZUTOQ1I": {"duration": 113, "path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/circumference-from-area/", "keywords": "", "id": "Rcb7ZUTOQ1I", "title": "Circumference of a circle", "description": "Here we find the circumference, the distance around a circle, given the area. We're building on our knowledge of the parts of circle.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Rcb7ZUTOQ1I.mp4/Rcb7ZUTOQ1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Rcb7ZUTOQ1I.mp4/Rcb7ZUTOQ1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Rcb7ZUTOQ1I.m3u8/Rcb7ZUTOQ1I.m3u8"}, "slug": "circumference-from-area", "video_id": "Rcb7ZUTOQ1I", "youtube_id": "Rcb7ZUTOQ1I", "readable_id": "circumference-from-area"}, "RbBQN0Wt_wY": {"duration": 342, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/giotto-arena-scrovegni-chapel-part-3-of-4/", "keywords": "Giotto, Scrovegni, Arena, Chapel, Lamentation, Mourning, Narrative, art, painting, fresco, Italian, Italy, Medieval, Proto-Renaissance", "id": "RbBQN0Wt_wY", "title": "Giotto, Arena (Scrovegni) Chapel (part 3)", "description": "Part 3: The Lamentation from Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RbBQN0Wt_wY.mp4/RbBQN0Wt_wY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RbBQN0Wt_wY.mp4/RbBQN0Wt_wY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RbBQN0Wt_wY.m3u8/RbBQN0Wt_wY.m3u8"}, "slug": "giotto-arena-scrovegni-chapel-part-3-of-4", "video_id": "RbBQN0Wt_wY", "youtube_id": "RbBQN0Wt_wY", "readable_id": "giotto-arena-scrovegni-chapel-part-3-of-4"}, "a9QtIfPIQl4": {"duration": 670, "path": "khan/humanities/history/euro-hist/china-early-1900s/overview-of-chinese-history-1911-1949/", "keywords": "", "id": "a9QtIfPIQl4", "title": "Overview of Chinese history 1911 - 1949", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a9QtIfPIQl4.mp4/a9QtIfPIQl4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a9QtIfPIQl4.mp4/a9QtIfPIQl4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a9QtIfPIQl4.m3u8/a9QtIfPIQl4.m3u8"}, "slug": "overview-of-chinese-history-1911-1949", "video_id": "a9QtIfPIQl4", "youtube_id": "a9QtIfPIQl4", "readable_id": "overview-of-chinese-history-1911-1949"}, "RTE_aitAPGw": {"duration": 91, "path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/comparing-colleges-diversity/", "keywords": "", "id": "RTE_aitAPGw", "title": "Comparing colleges based on diversity", "description": "Filter by percentage of minority students using College Board's college search tool", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RTE_aitAPGw.mp4/RTE_aitAPGw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RTE_aitAPGw.mp4/RTE_aitAPGw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RTE_aitAPGw.m3u8/RTE_aitAPGw.m3u8"}, "slug": "comparing-colleges-diversity", "video_id": "RTE_aitAPGw", "youtube_id": "RTE_aitAPGw", "readable_id": "comparing-colleges-diversity"}, "At8jOJ_rpzA": {"duration": 463, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/arterial-elastance-ea-and-preload/", "keywords": "", "id": "At8jOJ_rpzA", "title": "Arterial elastance (Ea) and preload", "description": "Understand how Ea is affected by changes in preload, and in turn, how the PV loop can shift. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/At8jOJ_rpzA.mp4/At8jOJ_rpzA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/At8jOJ_rpzA.mp4/At8jOJ_rpzA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/At8jOJ_rpzA.m3u8/At8jOJ_rpzA.m3u8"}, "slug": "arterial-elastance-ea-and-preload", "video_id": "At8jOJ_rpzA", "youtube_id": "At8jOJ_rpzA", "readable_id": "arterial-elastance-ea-and-preload"}, "B0R3MJOrST0": {"duration": 135, "path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/recognizing-angles-examples/", "keywords": "", "id": "B0R3MJOrST0", "title": "Recognizing angles", "description": "Let's do a few example exercises in which you recognize and identify the type of given angle. This is a lot of fun!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/B0R3MJOrST0.mp4/B0R3MJOrST0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/B0R3MJOrST0.mp4/B0R3MJOrST0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/B0R3MJOrST0.m3u8/B0R3MJOrST0.m3u8"}, "slug": "recognizing-angles-examples", "video_id": "B0R3MJOrST0", "youtube_id": "B0R3MJOrST0", "readable_id": "recognizing-angles-examples"}, "LiOfeSsjrB8": {"duration": 562, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction/", "keywords": "tropomyosin, troponin, calcium, ion, muscle, contraction", "id": "LiOfeSsjrB8", "title": "Tropomyosin and troponin and their role in regulating muscle contraction", "description": "Tropomyosin and troponin and their role in regulating muscle contraction. How calcium ion concentration dictates whether a muscle is contracting or not.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LiOfeSsjrB8.mp4/LiOfeSsjrB8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LiOfeSsjrB8.mp4/LiOfeSsjrB8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LiOfeSsjrB8.m3u8/LiOfeSsjrB8.m3u8"}, "slug": "tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction", "video_id": "LiOfeSsjrB8", "youtube_id": "LiOfeSsjrB8", "readable_id": "tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction"}, "i65NIcnHS9Y": {"duration": 228, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-as-insurance/", "keywords": "Put, as, Insurance", "id": "i65NIcnHS9Y", "title": "Put as insurance", "description": "Put as Insurance", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i65NIcnHS9Y.mp4/i65NIcnHS9Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i65NIcnHS9Y.mp4/i65NIcnHS9Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i65NIcnHS9Y.m3u8/i65NIcnHS9Y.m3u8"}, "slug": "put-as-insurance", "video_id": "i65NIcnHS9Y", "youtube_id": "i65NIcnHS9Y", "readable_id": "put-as-insurance"}, "IOIx0T4vx8c": {"duration": 956, "path": "khan/humanities/music/music-instruments-orchestra/brass-music/tuba-interview-and-demonstration-with-chris-olka/", "keywords": "", "id": "IOIx0T4vx8c", "title": "Tuba: Interview and demonstration with Chris Olka", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IOIx0T4vx8c.mp4/IOIx0T4vx8c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IOIx0T4vx8c.mp4/IOIx0T4vx8c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IOIx0T4vx8c.m3u8/IOIx0T4vx8c.m3u8"}, "slug": "tuba-interview-and-demonstration-with-chris-olka", "video_id": "IOIx0T4vx8c", "youtube_id": "IOIx0T4vx8c", "readable_id": "tuba-interview-and-demonstration-with-chris-olka"}, "YvacYWgygaA": {"duration": 605, "path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/work-energy-problem-with-friction/", "keywords": "physics, frictions, nonconservative, force, energy, work, kinetic, potential", "id": "YvacYWgygaA", "title": "Work/energy problem with friction", "description": "A conservation of energy problem where all of the energy is not conserved.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YvacYWgygaA.mp4/YvacYWgygaA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YvacYWgygaA.mp4/YvacYWgygaA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YvacYWgygaA.m3u8/YvacYWgygaA.m3u8"}, "slug": "work-energy-problem-with-friction", "video_id": "YvacYWgygaA", "youtube_id": "YvacYWgygaA", "readable_id": "work-energy-problem-with-friction"}, "BMNj7-Okclk": {"duration": 357, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/gdp-components-tutorial/examples-of-accounting-for-gdp/", "keywords": "macroeconomics, Gross Domestic Product", "id": "BMNj7-Okclk", "title": "Examples of accounting for GDP", "description": "Thinking about how different types of expenditures would be accounted for in GDP", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BMNj7-Okclk.mp4/BMNj7-Okclk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BMNj7-Okclk.mp4/BMNj7-Okclk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BMNj7-Okclk.m3u8/BMNj7-Okclk.m3u8"}, "slug": "examples-of-accounting-for-gdp", "video_id": "BMNj7-Okclk", "youtube_id": "BMNj7-Okclk", "readable_id": "examples-of-accounting-for-gdp"}, "6WCfVjUTTEY": {"duration": 602, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/present-value/present-value-4-and-discounted-cash-flow/", "keywords": "present, value, DCF, finance", "id": "6WCfVjUTTEY", "title": "Present value 4 (and discounted cash flow)", "description": "Lets change the discount rates depending on how far out the payments are.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6WCfVjUTTEY.mp4/6WCfVjUTTEY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6WCfVjUTTEY.mp4/6WCfVjUTTEY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6WCfVjUTTEY.m3u8/6WCfVjUTTEY.m3u8"}, "slug": "present-value-4-and-discounted-cash-flow", "video_id": "6WCfVjUTTEY", "youtube_id": "6WCfVjUTTEY", "readable_id": "present-value-4-and-discounted-cash-flow"}, "6m642-2D3V4": {"duration": 238, "path": "khan/math/algebra-basics/core-algebra-graphing-lines-slope/core-algebra-graphing-intercepts/graphing-using-x-and-y-intercepts/", "keywords": "u13_l1_t2_we2, Graphing, using, and, intercepts, CC_8_EE_7, CC_39336_A-REI_3", "id": "6m642-2D3V4", "title": "Graphing using x- and y-intercepts", "description": "Graphing using X and Y intercepts", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6m642-2D3V4.mp4/6m642-2D3V4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6m642-2D3V4.mp4/6m642-2D3V4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6m642-2D3V4.m3u8/6m642-2D3V4.m3u8"}, "slug": "graphing-using-x-and-y-intercepts", "video_id": "6m642-2D3V4", "youtube_id": "6m642-2D3V4", "readable_id": "graphing-using-x-and-y-intercepts"}, "zvetEuVJ0bE": {"duration": 191, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-sub-two-dig-intro/regrouping-to-subtract-one-digit-number/", "keywords": "education,online learning,learning,lessons", "id": "zvetEuVJ0bE", "title": "Regrouping to subtract one-digit number", "description": "Learn how to subtract 35-8.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zvetEuVJ0bE.mp4/zvetEuVJ0bE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zvetEuVJ0bE.mp4/zvetEuVJ0bE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zvetEuVJ0bE.m3u8/zvetEuVJ0bE.m3u8"}, "slug": "regrouping-to-subtract-one-digit-number", "video_id": "zvetEuVJ0bE", "youtube_id": "zvetEuVJ0bE", "readable_id": "regrouping-to-subtract-one-digit-number"}, "Q5IWDhXtsmE": {"duration": 352, "path": "khan/humanities/ancient-art-civilizations/greek-art/early-classical/kritios-boy/", "keywords": "", "id": "Q5IWDhXtsmE", "title": "Kritios Boy", "description": "Kritios Boy, from the Acropolis, Athens, c. 480 B.C.E., 3' 10\" high (Acropolis Museum, Athens),\u00a0Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q5IWDhXtsmE.mp4/Q5IWDhXtsmE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q5IWDhXtsmE.mp4/Q5IWDhXtsmE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q5IWDhXtsmE.m3u8/Q5IWDhXtsmE.m3u8"}, "slug": "kritios-boy", "video_id": "Q5IWDhXtsmE", "youtube_id": "Q5IWDhXtsmE", "readable_id": "kritios-boy"}, "-rGXAfc643A": {"duration": 621, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony/ludwig-van-beethoven-part-1/", "keywords": "", "id": "-rGXAfc643A", "title": "Ludwig van Beethoven: Symphony No. 5, analysis by Gerard Schwarz (part 1)", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-rGXAfc643A.mp4/-rGXAfc643A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-rGXAfc643A.mp4/-rGXAfc643A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-rGXAfc643A.m3u8/-rGXAfc643A.m3u8"}, "slug": "ludwig-van-beethoven-part-1", "video_id": "-rGXAfc643A", "youtube_id": "-rGXAfc643A", "readable_id": "ludwig-van-beethoven-part-1"}, "-ij_dFJvMYk": {"duration": 162, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ben-milne/kauffman-ben-milne1/", "keywords": "", "id": "-ij_dFJvMYk", "title": "Ben Milne - CEO of Dwolla", "description": "Ben Milne, CEO of Dwolla, discusses his motivation in founding his company and the excitement of starting something new. Ben advocates for the idea that failure, which can happen in big and small ways, does not have to be your legacy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-ij_dFJvMYk.mp4/-ij_dFJvMYk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-ij_dFJvMYk.mp4/-ij_dFJvMYk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-ij_dFJvMYk.m3u8/-ij_dFJvMYk.m3u8"}, "slug": "kauffman-ben-milne1", "video_id": "-ij_dFJvMYk", "youtube_id": "-ij_dFJvMYk", "readable_id": "kauffman-ben-milne1"}, "vDaIKB19TvY": {"duration": 298, "path": "khan/math/algebra/introduction-to-algebra/variable-and-expressions/why-aren-t-we-using-the-multiplication-sign/", "keywords": "", "id": "vDaIKB19TvY", "title": "Why aren't we using the multiplication sign?", "description": "Great question. In algebra, we do indeed avoid using the multiplication sign. We'll explain it for you here.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vDaIKB19TvY.mp4/vDaIKB19TvY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vDaIKB19TvY.mp4/vDaIKB19TvY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vDaIKB19TvY.m3u8/vDaIKB19TvY.m3u8"}, "slug": "why-aren-t-we-using-the-multiplication-sign", "video_id": "vDaIKB19TvY", "youtube_id": "vDaIKB19TvY", "readable_id": "why-aren-t-we-using-the-multiplication-sign"}, "KsdZsWOsB84": {"duration": 474, "path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/protection-of-alcohols/", "keywords": "", "id": "KsdZsWOsB84", "title": "Protection of alcohols", "description": "Questions pertaining to alcohols and phenols", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KsdZsWOsB84.mp4/KsdZsWOsB84.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KsdZsWOsB84.mp4/KsdZsWOsB84.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KsdZsWOsB84.m3u8/KsdZsWOsB84.m3u8"}, "slug": "protection-of-alcohols", "video_id": "KsdZsWOsB84", "youtube_id": "KsdZsWOsB84", "readable_id": "protection-of-alcohols"}, "O8vB1eInP_8": {"duration": 500, "path": "khan/math/probability/statistics-inferential/margin-of-error/mean-and-variance-of-bernoulli-distribution-example/", "keywords": "Mean, and, Variance, of, Bernoulli, Distribution, Example", "id": "O8vB1eInP_8", "title": "Mean and variance of Bernoulli distribution example", "description": "Mean and Variance of Bernoulli Distribution Example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O8vB1eInP_8.mp4/O8vB1eInP_8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O8vB1eInP_8.mp4/O8vB1eInP_8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O8vB1eInP_8.m3u8/O8vB1eInP_8.m3u8"}, "slug": "mean-and-variance-of-bernoulli-distribution-example", "video_id": "O8vB1eInP_8", "youtube_id": "O8vB1eInP_8", "readable_id": "mean-and-variance-of-bernoulli-distribution-example"}, "sRVGcYGjUk8": {"duration": 737, "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/statistics-alternate-variance-formulas/", "keywords": "variance, statistics, population, CC_6_SP_3, CC_6_SP_4, CC_6_SP_5_c", "id": "sRVGcYGjUk8", "title": "Statistics: Alternate variance formulas", "description": "Playing with the formula for variance of a population.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sRVGcYGjUk8.mp4/sRVGcYGjUk8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sRVGcYGjUk8.mp4/sRVGcYGjUk8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sRVGcYGjUk8.m3u8/sRVGcYGjUk8.m3u8"}, "slug": "statistics-alternate-variance-formulas", "video_id": "sRVGcYGjUk8", "youtube_id": "sRVGcYGjUk8", "readable_id": "statistics-alternate-variance-formulas"}, "iSfXdNIolQA": {"duration": 464, "path": "khan/partner-content/wi-phi/metaphys-epistemology/problem-of-free-will/", "keywords": "", "id": "iSfXdNIolQA", "title": "Metaphysics: Problem of Free Will", "description": "Richard discusses one of the classic philosophical problem of free will --- that is, the question of whether we decide things for ourselves, or are forced to go one way or another. He distinguishes between two different worries. One worry is that the laws of physics, plus facts about the past over which we have no control, determine what we will do, and that means we\u2019re not free. Another worry is that because the laws and the past determine what we\u2019ll do, someone smart enough could know what we would do ahead of time, so we can\u2019t be free. He says the second worry is much worse than the first, but argues that the second doesn\u2019t follow from the first.\n\nSpeaker: Dr. Richard Holton,\u00a0Professor of Philosophy, Massachusetts Institute of Technology", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iSfXdNIolQA.mp4/iSfXdNIolQA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iSfXdNIolQA.mp4/iSfXdNIolQA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iSfXdNIolQA.m3u8/iSfXdNIolQA.m3u8"}, "slug": "problem-of-free-will", "video_id": "iSfXdNIolQA", "youtube_id": "iSfXdNIolQA", "readable_id": "problem-of-free-will"}, "qv2K1yk0LCE": {"duration": 227, "path": "khan/humanities/renaissance-reformation/early-renaissance1/central-italy1/piero-della-francesca-the-baptism-of-christ-1450s/", "keywords": "national gallery, london", "id": "qv2K1yk0LCE", "title": "Piero della Francesca, The Baptism of Christ", "description": "Piero della Francesca, The Baptism of Christ, 1450s, tempera on wood, 167 x 116 cm (National Gallery, London). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qv2K1yk0LCE.mp4/qv2K1yk0LCE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qv2K1yk0LCE.mp4/qv2K1yk0LCE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qv2K1yk0LCE.m3u8/qv2K1yk0LCE.m3u8"}, "slug": "piero-della-francesca-the-baptism-of-christ-1450s", "video_id": "qv2K1yk0LCE", "youtube_id": "qv2K1yk0LCE", "readable_id": "piero-della-francesca-the-baptism-of-christ-1450s"}, "-ZS6FI24roY": {"duration": 94, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-25-shakespearean-character/", "keywords": "", "id": "-ZS6FI24roY", "title": "25 Shakespearean character", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-ZS6FI24roY.mp4/-ZS6FI24roY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-ZS6FI24roY.mp4/-ZS6FI24roY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-ZS6FI24roY.m3u8/-ZS6FI24roY.m3u8"}, "slug": "sat-25-shakespearean-character", "video_id": "-ZS6FI24roY", "youtube_id": "-ZS6FI24roY", "readable_id": "sat-25-shakespearean-character"}, "g02RnGXCXrQ": {"duration": 324, "path": "khan/test-prep/mcat/biomolecules/genetic-mutations/an-introduction-to-genetic-mutations/", "keywords": "MCAT", "id": "g02RnGXCXrQ", "title": "An introduction to genetic mutations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g02RnGXCXrQ.mp4/g02RnGXCXrQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g02RnGXCXrQ.mp4/g02RnGXCXrQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g02RnGXCXrQ.m3u8/g02RnGXCXrQ.m3u8"}, "slug": "an-introduction-to-genetic-mutations", "video_id": "g02RnGXCXrQ", "youtube_id": "g02RnGXCXrQ", "readable_id": "an-introduction-to-genetic-mutations"}, "Ka82QC4QvGA": {"duration": 504, "path": "khan/math/geometry/basic-geometry/area_non_standard/quadrilateral-overview/", "keywords": "rhombus", "id": "Ka82QC4QvGA", "title": "Quadrilateral overview", "description": "\"Quad\" means \"four\" and \"lateral\" means \"line.\" A quadrilateral is literally a shape with four sides (lines) and four angles. Let's learn the difference between concave and convex quadrilaterals as well as trapezoids, parallelograms, and rhombi.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ka82QC4QvGA.mp4/Ka82QC4QvGA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ka82QC4QvGA.mp4/Ka82QC4QvGA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ka82QC4QvGA.m3u8/Ka82QC4QvGA.m3u8"}, "slug": "quadrilateral-overview", "video_id": "Ka82QC4QvGA", "youtube_id": "Ka82QC4QvGA", "readable_id": "quadrilateral-overview"}, "eEJqaNaq9v8": {"duration": 614, "path": "khan/test-prep/mcat/physical-processes/gas-phase/absolute-temperature-and-the-kelvin-scale/", "keywords": "", "id": "eEJqaNaq9v8", "title": "Absolute temperature and the kelvin scale", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eEJqaNaq9v8.mp4/eEJqaNaq9v8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eEJqaNaq9v8.mp4/eEJqaNaq9v8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eEJqaNaq9v8.m3u8/eEJqaNaq9v8.m3u8"}, "slug": "absolute-temperature-and-the-kelvin-scale", "video_id": "eEJqaNaq9v8", "youtube_id": "eEJqaNaq9v8", "readable_id": "absolute-temperature-and-the-kelvin-scale"}, "TA5SLDiIUWs": {"duration": 222, "path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/gamma-waves/", "keywords": "", "id": "TA5SLDiIUWs", "title": "Gamma waves (1900)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TA5SLDiIUWs.mp4/TA5SLDiIUWs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TA5SLDiIUWs.mp4/TA5SLDiIUWs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TA5SLDiIUWs.m3u8/TA5SLDiIUWs.m3u8"}, "slug": "gamma-waves", "video_id": "TA5SLDiIUWs", "youtube_id": "TA5SLDiIUWs", "readable_id": "gamma-waves"}, "cQKPvT-aEqk": {"duration": 631, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/endocrine-system-and-influence-on-behavior-part-1/", "keywords": "", "id": "cQKPvT-aEqk", "title": "Endocrine system and influence on behavior - Part 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cQKPvT-aEqk.mp4/cQKPvT-aEqk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cQKPvT-aEqk.mp4/cQKPvT-aEqk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cQKPvT-aEqk.m3u8/cQKPvT-aEqk.m3u8"}, "slug": "endocrine-system-and-influence-on-behavior-part-1", "video_id": "cQKPvT-aEqk", "youtube_id": "cQKPvT-aEqk", "readable_id": "endocrine-system-and-influence-on-behavior-part-1"}, "_-a-yNubpk8": {"duration": 275, "path": "khan/math/differential-equations/first-order-differential-equations/eulers-method-tutorial/example-eulers-method-exercise/", "keywords": "", "id": "_-a-yNubpk8", "title": "Example Euler's method exercise", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_-a-yNubpk8.mp4/_-a-yNubpk8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_-a-yNubpk8.mp4/_-a-yNubpk8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_-a-yNubpk8.m3u8/_-a-yNubpk8.m3u8"}, "slug": "example-eulers-method-exercise", "video_id": "_-a-yNubpk8", "youtube_id": "_-a-yNubpk8", "readable_id": "example-eulers-method-exercise"}, "KcqO1fX9b_I": {"duration": 273, "path": "khan/math/differential-calculus/limits_topic/limits-infinity/more-limits-at-infinity/", "keywords": "", "id": "KcqO1fX9b_I", "title": "More limits at infinity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KcqO1fX9b_I.mp4/KcqO1fX9b_I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KcqO1fX9b_I.mp4/KcqO1fX9b_I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KcqO1fX9b_I.m3u8/KcqO1fX9b_I.m3u8"}, "slug": "more-limits-at-infinity", "video_id": "KcqO1fX9b_I", "youtube_id": "KcqO1fX9b_I", "readable_id": "more-limits-at-infinity"}, "NT0SHjOowLA": {"duration": 738, "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/why-is-that-important-looking-at-jackson-pollock/", "keywords": "art history", "id": "NT0SHjOowLA", "title": "Why is that important? Looking at Jackson Pollock", "description": "Why is that Important?: Looking at Jackson Pollock\n\nA conversation with Sal Khan, Steven Zucker and Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NT0SHjOowLA.mp4/NT0SHjOowLA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NT0SHjOowLA.mp4/NT0SHjOowLA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NT0SHjOowLA.m3u8/NT0SHjOowLA.m3u8"}, "slug": "why-is-that-important-looking-at-jackson-pollock", "video_id": "NT0SHjOowLA", "youtube_id": "NT0SHjOowLA", "readable_id": "why-is-that-important-looking-at-jackson-pollock"}, "L5eBJjx2FP8": {"duration": 277, "path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/switching-integral-bounds/", "keywords": "", "id": "L5eBJjx2FP8", "title": "Switching bounds of definite integral", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L5eBJjx2FP8.mp4/L5eBJjx2FP8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L5eBJjx2FP8.mp4/L5eBJjx2FP8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L5eBJjx2FP8.m3u8/L5eBJjx2FP8.m3u8"}, "slug": "switching-integral-bounds", "video_id": "L5eBJjx2FP8", "youtube_id": "L5eBJjx2FP8", "readable_id": "switching-integral-bounds"}, "rcBaqkGp7CA": {"duration": 623, "path": "khan/math/geometry/right_triangles_topic/pythagorean_proofs/another-pythagorean-theorem-proof/", "keywords": "", "id": "rcBaqkGp7CA", "title": "Another Pythagorean theorem proof", "description": "Visually proving the Pythagorean Theorem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rcBaqkGp7CA.mp4/rcBaqkGp7CA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rcBaqkGp7CA.mp4/rcBaqkGp7CA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rcBaqkGp7CA.m3u8/rcBaqkGp7CA.m3u8"}, "slug": "another-pythagorean-theorem-proof", "video_id": "rcBaqkGp7CA", "youtube_id": "rcBaqkGp7CA", "readable_id": "another-pythagorean-theorem-proof"}, "qkfODKmZ-x4": {"duration": 913, "path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/linear-transformation-examples-scaling-and-reflections/", "keywords": "linear, transformation, matrices", "id": "qkfODKmZ-x4", "title": "Linear transformation examples: Scaling and reflections", "description": "Creating scaling and reflection transformation matrices (which are diagonal)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qkfODKmZ-x4.mp4/qkfODKmZ-x4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qkfODKmZ-x4.mp4/qkfODKmZ-x4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qkfODKmZ-x4.m3u8/qkfODKmZ-x4.m3u8"}, "slug": "linear-transformation-examples-scaling-and-reflections", "video_id": "qkfODKmZ-x4", "youtube_id": "qkfODKmZ-x4", "readable_id": "linear-transformation-examples-scaling-and-reflections"}, "wVMe8ZmCZo0": {"duration": 301, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/redox-reaction-from-dissolving-zinc-in-copper-sulfate/", "keywords": "", "id": "wVMe8ZmCZo0", "title": "Redox reaction from dissolving zinc in copper sulfate", "description": "What happens when you add zinc to a solution of copper sulfate? Identifying the half reactions to see what got oxidized and reduced.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wVMe8ZmCZo0.mp4/wVMe8ZmCZo0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wVMe8ZmCZo0.mp4/wVMe8ZmCZo0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wVMe8ZmCZo0.m3u8/wVMe8ZmCZo0.m3u8"}, "slug": "redox-reaction-from-dissolving-zinc-in-copper-sulfate", "video_id": "wVMe8ZmCZo0", "youtube_id": "wVMe8ZmCZo0", "readable_id": "redox-reaction-from-dissolving-zinc-in-copper-sulfate"}, "e6sh8AXz41E": {"duration": 621, "path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/identifying-similar-triangles-in-the-coordinate-plane/", "keywords": "", "id": "e6sh8AXz41E", "title": "Identifying similar triangles in the coordinate plane", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e6sh8AXz41E.mp4/e6sh8AXz41E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e6sh8AXz41E.mp4/e6sh8AXz41E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e6sh8AXz41E.m3u8/e6sh8AXz41E.m3u8"}, "slug": "identifying-similar-triangles-in-the-coordinate-plane", "video_id": "e6sh8AXz41E", "youtube_id": "e6sh8AXz41E", "readable_id": "identifying-similar-triangles-in-the-coordinate-plane"}, "-3DFzxbP9Fk": {"duration": 102, "path": "khan/math/early-math/cc-early-math-add-sub-basics/cc-early-math-add-sub-word-problem-within-10/addition-word-problems-within-10/", "keywords": "", "id": "-3DFzxbP9Fk", "title": "Addition word problems within 10", "description": "Learn how to solve word problems by adding small numbers (numbers 10 or less).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-3DFzxbP9Fk.mp4/-3DFzxbP9Fk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-3DFzxbP9Fk.mp4/-3DFzxbP9Fk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-3DFzxbP9Fk.m3u8/-3DFzxbP9Fk.m3u8"}, "slug": "addition-word-problems-within-10", "video_id": "-3DFzxbP9Fk", "youtube_id": "-3DFzxbP9Fk", "readable_id": "addition-word-problems-within-10"}, "zA2KSx5OYog": {"duration": 228, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/john-roddam-spencer-stanhope-thoughts-of-the-past-exhibited-1859/", "keywords": "Smarthistory, Art History, Pre-Raphaelites, Tate Britain, Prostitution, Victorian, John Roddam Spencer Stanhope, Thoughts of the Past, 1859, Stanhope, Khan Academy, Google Art Project, OER, painting", "id": "zA2KSx5OYog", "title": "John Roddam Spencer Stanhope, Thoughts of the Past", "description": "John Roddam Spencer Stanhope, Thoughts of the Past, exhibited 1859, oil on canvas, 864 x 508 mm (Tate Britain, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zA2KSx5OYog.mp4/zA2KSx5OYog.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zA2KSx5OYog.mp4/zA2KSx5OYog.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zA2KSx5OYog.m3u8/zA2KSx5OYog.m3u8"}, "slug": "john-roddam-spencer-stanhope-thoughts-of-the-past-exhibited-1859", "video_id": "zA2KSx5OYog", "youtube_id": "zA2KSx5OYog", "readable_id": "john-roddam-spencer-stanhope-thoughts-of-the-past-exhibited-1859"}, "ssz6TElXEOM": {"duration": 167, "path": "khan/math/differential-calculus/taking-derivatives/chain_rule/derivative-of-log-with-arbitrary-base/", "keywords": "", "id": "ssz6TElXEOM", "title": "Derivative of log with arbitrary base", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ssz6TElXEOM.mp4/ssz6TElXEOM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ssz6TElXEOM.mp4/ssz6TElXEOM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ssz6TElXEOM.m3u8/ssz6TElXEOM.m3u8"}, "slug": "derivative-of-log-with-arbitrary-base", "video_id": "ssz6TElXEOM", "youtube_id": "ssz6TElXEOM", "readable_id": "derivative-of-log-with-arbitrary-base"}, "DGZNaKnbQo0": {"duration": 281, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/reading_data/reading-bar-charts-3/", "keywords": "", "id": "DGZNaKnbQo0", "title": "Reading bar charts: putting it together with central tendency", "description": "Let's combine some learning! Here we looking at bar charts and using the information to determine the measures of central tendency.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DGZNaKnbQo0.mp4/DGZNaKnbQo0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DGZNaKnbQo0.mp4/DGZNaKnbQo0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DGZNaKnbQo0.m3u8/DGZNaKnbQo0.m3u8"}, "slug": "reading-bar-charts-3", "video_id": "DGZNaKnbQo0", "youtube_id": "DGZNaKnbQo0", "readable_id": "reading-bar-charts-3"}, "nTco9qQ2elM": {"duration": 215, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/hedge-fund-strategies-long-short-1/", "keywords": "finance, hedge, fund", "id": "nTco9qQ2elM", "title": "Hedge fund strategies: Long short 1", "description": "Setting up a simple long-short hedge (assuming the companies have similar beta or correlation with market)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nTco9qQ2elM.mp4/nTco9qQ2elM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nTco9qQ2elM.mp4/nTco9qQ2elM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nTco9qQ2elM.m3u8/nTco9qQ2elM.m3u8"}, "slug": "hedge-fund-strategies-long-short-1", "video_id": "nTco9qQ2elM", "youtube_id": "nTco9qQ2elM", "readable_id": "hedge-fund-strategies-long-short-1"}, "NrVvu7cM8_o": {"duration": 332, "path": "khan/math/pre-algebra/negatives-absolute-value-pre-alg/add-subtract-negatives-pre-alg/adding-integers-with-different-signs/", "keywords": "U09_L2_T1_we2, Adding, integers, with, different, signs, CC_7_NS_1_b, CC_7_NS_1_c", "id": "NrVvu7cM8_o", "title": "Adding numbers with different signs (example)", "description": "Use a number line to add 15 + (-46) + 29", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NrVvu7cM8_o.mp4/NrVvu7cM8_o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NrVvu7cM8_o.mp4/NrVvu7cM8_o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NrVvu7cM8_o.m3u8/NrVvu7cM8_o.m3u8"}, "slug": "adding-integers-with-different-signs", "video_id": "NrVvu7cM8_o", "youtube_id": "NrVvu7cM8_o", "readable_id": "adding-integers-with-different-signs"}, "Qz1g6kqvUG8": {"duration": 598, "path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/venturi-effect-and-pitot-tubes/", "keywords": "", "id": "Qz1g6kqvUG8", "title": "Venturi effect and Pitot tubes", "description": "David explains the Venturi effect and the role and function of Pitot tubes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qz1g6kqvUG8.mp4/Qz1g6kqvUG8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qz1g6kqvUG8.mp4/Qz1g6kqvUG8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qz1g6kqvUG8.m3u8/Qz1g6kqvUG8.m3u8"}, "slug": "venturi-effect-and-pitot-tubes", "video_id": "Qz1g6kqvUG8", "youtube_id": "Qz1g6kqvUG8", "readable_id": "venturi-effect-and-pitot-tubes"}, "O4St29B7cmU": {"duration": 186, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/mary-cassatt-the-child-s-bath-1893/", "keywords": "Mary Cassatt, The Child's Bath, Bath, Child, mother 1893, Art Institute of Chicago, Impressionism, Japanese prints, painting, Paris, Chicago, Smarthistory, Google Art Project, Khan Academy, art history, OER", "id": "O4St29B7cmU", "title": "Cassatt, The Child's Bath", "description": "Mary Cassatt, The Child's Bath, 1893, oil on canvas, 100.3 x 66.1 cm / 39-1/2 x 26 inches (Art Institute of Chicago)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O4St29B7cmU.mp4/O4St29B7cmU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O4St29B7cmU.mp4/O4St29B7cmU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O4St29B7cmU.m3u8/O4St29B7cmU.m3u8"}, "slug": "mary-cassatt-the-child-s-bath-1893", "video_id": "O4St29B7cmU", "youtube_id": "O4St29B7cmU", "readable_id": "mary-cassatt-the-child-s-bath-1893"}, "WOnOq9YIrWI": {"duration": 177, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/jan-van-huysum-vase-with-flowers-c-1718-20/", "keywords": "Still Life, Holland, Dutch, Art History, Smarthistory, Dulwich Picture Gallery", "id": "WOnOq9YIrWI", "title": "Van Huysum, Vase with Flowers", "description": "Jan van Huysum, Vase with Flowers, c. 1718-20, oil on canvas, 24 x 31 in. (61 x 79 cm), (Dulwich Picture Gallery, London)\n\nSpeakers: Pippa Couch, Rachel S. Ropeik", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WOnOq9YIrWI.mp4/WOnOq9YIrWI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WOnOq9YIrWI.mp4/WOnOq9YIrWI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WOnOq9YIrWI.m3u8/WOnOq9YIrWI.m3u8"}, "slug": "jan-van-huysum-vase-with-flowers-c-1718-20", "video_id": "WOnOq9YIrWI", "youtube_id": "WOnOq9YIrWI", "readable_id": "jan-van-huysum-vase-with-flowers-c-1718-20"}, "-aTy1ED1m5I": {"duration": 320, "path": "khan/math/algebra-basics/core-algebra-graphing-lines-slope/core-algebra-graphing-linear-inequalities/graphing-inequalities-2/", "keywords": "u13_l2_t4_we2, Graphing, Inequalities", "id": "-aTy1ED1m5I", "title": "Graphing inequalities 2", "description": "Graphing Inequalities 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-aTy1ED1m5I.mp4/-aTy1ED1m5I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-aTy1ED1m5I.mp4/-aTy1ED1m5I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-aTy1ED1m5I.m3u8/-aTy1ED1m5I.m3u8"}, "slug": "graphing-inequalities-2", "video_id": "-aTy1ED1m5I", "youtube_id": "-aTy1ED1m5I", "readable_id": "graphing-inequalities-2"}, "8nod8JWaO1o": {"duration": 584, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-2/", "keywords": "gmat, data, sufficiency", "id": "8nod8JWaO1o", "title": "GMAT: Data sufficiency 2", "description": "6-9, pg. 278", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8nod8JWaO1o.mp4/8nod8JWaO1o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8nod8JWaO1o.mp4/8nod8JWaO1o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8nod8JWaO1o.m3u8/8nod8JWaO1o.m3u8"}, "slug": "gmat-data-sufficiency-2", "video_id": "8nod8JWaO1o", "youtube_id": "8nod8JWaO1o", "readable_id": "gmat-data-sufficiency-2"}, "n-iEqLhGfd4": {"duration": 406, "path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/integration-by-parts-twice-for-antiderivative-of-x-2-e-x/", "keywords": "", "id": "n-iEqLhGfd4", "title": "Integration by parts twice for antiderivative of (x^2)(e^x)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n-iEqLhGfd4.mp4/n-iEqLhGfd4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n-iEqLhGfd4.mp4/n-iEqLhGfd4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n-iEqLhGfd4.m3u8/n-iEqLhGfd4.m3u8"}, "slug": "integration-by-parts-twice-for-antiderivative-of-x-2-e-x", "video_id": "n-iEqLhGfd4", "youtube_id": "n-iEqLhGfd4", "readable_id": "integration-by-parts-twice-for-antiderivative-of-x-2-e-x"}, "yqCGsOfKdRM": {"duration": 204, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/giles-shih/kauffman-giles-shih1/", "keywords": "", "id": "yqCGsOfKdRM", "title": "Giles Shih - President and CEO of BioResource International", "description": "Giles Shih, President and CEO of BioResource International, describes his company and explains how producing \"big green chickens\" will help feed the world.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yqCGsOfKdRM.mp4/yqCGsOfKdRM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yqCGsOfKdRM.mp4/yqCGsOfKdRM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yqCGsOfKdRM.m3u8/yqCGsOfKdRM.m3u8"}, "slug": "kauffman-giles-shih1", "video_id": "yqCGsOfKdRM", "youtube_id": "yqCGsOfKdRM", "readable_id": "kauffman-giles-shih1"}, "Bc9bhLk_AhI": {"duration": 447, "path": "khan/science/biology/her/heredity-and-genetics/allele-frequency/", "keywords": "", "id": "Bc9bhLk_AhI", "title": "Allele frequency", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Bc9bhLk_AhI.mp4/Bc9bhLk_AhI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Bc9bhLk_AhI.mp4/Bc9bhLk_AhI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Bc9bhLk_AhI.m3u8/Bc9bhLk_AhI.m3u8"}, "slug": "allele-frequency", "video_id": "Bc9bhLk_AhI", "youtube_id": "Bc9bhLk_AhI", "readable_id": "allele-frequency"}, "vIE8aYYsw8M": {"duration": 90, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-9/", "keywords": "", "id": "vIE8aYYsw8M", "title": "9 Magazine subscriptions", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vIE8aYYsw8M.mp4/vIE8aYYsw8M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vIE8aYYsw8M.mp4/vIE8aYYsw8M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vIE8aYYsw8M.m3u8/vIE8aYYsw8M.m3u8"}, "slug": "2013-sat-practice-6-9", "video_id": "vIE8aYYsw8M", "youtube_id": "vIE8aYYsw8M", "readable_id": "2013-sat-practice-6-9"}, "nj3l2PbD8Cw": {"duration": 71, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-2/", "keywords": "", "id": "nj3l2PbD8Cw", "title": "2 Possible values of x", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nj3l2PbD8Cw.mp4/nj3l2PbD8Cw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nj3l2PbD8Cw.mp4/nj3l2PbD8Cw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nj3l2PbD8Cw.m3u8/nj3l2PbD8Cw.m3u8"}, "slug": "2013-sat-practice-6-2", "video_id": "nj3l2PbD8Cw", "youtube_id": "nj3l2PbD8Cw", "readable_id": "2013-sat-practice-6-2"}, "MokI3Fi8jpc": {"duration": 142, "path": "khan/math/pre-algebra/decimals-pre-alg/percent-intro-pre-alg/describing-the-meaning-of-percent-2/", "keywords": "U05_L1_T1_we2, Describing, the, Meaning, of, Percent, CC_6_RP_3_c", "id": "MokI3Fi8jpc", "title": "The meaning of percent over 100", "description": "How does our meaning of percent (per \"hundred\") translate when we need to understand a percent OVER a hundred?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MokI3Fi8jpc.mp4/MokI3Fi8jpc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MokI3Fi8jpc.mp4/MokI3Fi8jpc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MokI3Fi8jpc.m3u8/MokI3Fi8jpc.m3u8"}, "slug": "describing-the-meaning-of-percent-2", "video_id": "MokI3Fi8jpc", "youtube_id": "MokI3Fi8jpc", "readable_id": "describing-the-meaning-of-percent-2"}, "okjt-OZY1JU": {"duration": 415, "path": "khan/math/integral-calculus/indefinite-definite-integrals/area-under-rate-function/area-under-rate-function-example/", "keywords": "", "id": "okjt-OZY1JU", "title": "Total water in a tub", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/okjt-OZY1JU.mp4/okjt-OZY1JU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/okjt-OZY1JU.mp4/okjt-OZY1JU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/okjt-OZY1JU.m3u8/okjt-OZY1JU.m3u8"}, "slug": "area-under-rate-function-example", "video_id": "okjt-OZY1JU", "youtube_id": "okjt-OZY1JU", "readable_id": "area-under-rate-function-example"}, "MC8Mc6tSjYI": {"duration": 419, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/thiols-sulfides/preparation-of-sulfides/", "keywords": "", "id": "MC8Mc6tSjYI", "title": "Preparation of sulfides", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MC8Mc6tSjYI.mp4/MC8Mc6tSjYI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MC8Mc6tSjYI.mp4/MC8Mc6tSjYI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MC8Mc6tSjYI.m3u8/MC8Mc6tSjYI.m3u8"}, "slug": "preparation-of-sulfides", "video_id": "MC8Mc6tSjYI", "youtube_id": "MC8Mc6tSjYI", "readable_id": "preparation-of-sulfides"}, "K7XAk7EvLSc": {"duration": 686, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/acid-catalyzed-ester-hydrolysis/", "keywords": "", "id": "K7XAk7EvLSc", "title": "Acid-catalyzed ester hydrolysis", "description": "The mechanism for the acid-catalyzed hydrolysis of esters (and transesterification)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K7XAk7EvLSc.mp4/K7XAk7EvLSc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K7XAk7EvLSc.mp4/K7XAk7EvLSc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K7XAk7EvLSc.m3u8/K7XAk7EvLSc.m3u8"}, "slug": "acid-catalyzed-ester-hydrolysis", "video_id": "K7XAk7EvLSc", "youtube_id": "K7XAk7EvLSc", "readable_id": "acid-catalyzed-ester-hydrolysis"}, "lpXCvX6ZenM": {"duration": 506, "path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-3-b-c/", "keywords": "advanced, placement, calculus", "id": "lpXCvX6ZenM", "title": "2011 Calculus BC free response #3 (b & c)", "description": "Volume of a solid of rotation and Chain Rule for rates of change.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lpXCvX6ZenM.mp4/lpXCvX6ZenM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lpXCvX6ZenM.mp4/lpXCvX6ZenM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lpXCvX6ZenM.m3u8/lpXCvX6ZenM.m3u8"}, "slug": "2011-calculus-bc-free-response-3-b-c", "video_id": "lpXCvX6ZenM", "youtube_id": "lpXCvX6ZenM", "readable_id": "2011-calculus-bc-free-response-3-b-c"}, "YxMBp4Ef3ek": {"duration": 243, "path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/cartier-bresson-behind-the-gare-saint-lazare-paris-1932/", "keywords": "cartier-bresson, photography, art history, smarthistory", "id": "YxMBp4Ef3ek", "title": "Cartier-Bresson, Behind the Gare St. Lazare", "description": "Henri Cartier-Bresson, Behind the Gare Saint-Lazare, Paris, 1932 Speakers: Dr. Shana Gallagher-Lindsay, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YxMBp4Ef3ek.mp4/YxMBp4Ef3ek.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YxMBp4Ef3ek.mp4/YxMBp4Ef3ek.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YxMBp4Ef3ek.m3u8/YxMBp4Ef3ek.m3u8"}, "slug": "cartier-bresson-behind-the-gare-saint-lazare-paris-1932", "video_id": "YxMBp4Ef3ek", "youtube_id": "YxMBp4Ef3ek", "readable_id": "cartier-bresson-behind-the-gare-saint-lazare-paris-1932"}, "Dfkq9SOWxY8": {"duration": 171, "path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/china-buys-us-bonds/", "keywords": "China, buys, US, Bonds", "id": "Dfkq9SOWxY8", "title": "China buys US bonds", "description": "China buys US Bonds", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Dfkq9SOWxY8.mp4/Dfkq9SOWxY8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Dfkq9SOWxY8.mp4/Dfkq9SOWxY8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Dfkq9SOWxY8.m3u8/Dfkq9SOWxY8.m3u8"}, "slug": "china-buys-us-bonds", "video_id": "Dfkq9SOWxY8", "youtube_id": "Dfkq9SOWxY8", "readable_id": "china-buys-us-bonds"}, "0fPwsLeH8fA": {"duration": 263, "path": "khan/humanities/global-culture/identity-body/identity-body-united-states/cindy-sherman-untitled-film-still-21-1978/", "keywords": "Art History, Cindy Sherman, Smarthistory, Khan Academy", "id": "0fPwsLeH8fA", "title": "Sherman, Untitled Film Still #21", "description": "Cindy Sherman, Untitled Film Still #21, 1978, gelatin silver print, 7.5 x 9.5 inches or 19.1 x 24.1 cm (MoMA) Speakers: Dr. Shana Gallagher-Lindsay, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0fPwsLeH8fA.mp4/0fPwsLeH8fA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0fPwsLeH8fA.mp4/0fPwsLeH8fA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0fPwsLeH8fA.m3u8/0fPwsLeH8fA.m3u8"}, "slug": "cindy-sherman-untitled-film-still-21-1978", "video_id": "0fPwsLeH8fA", "youtube_id": "0fPwsLeH8fA", "readable_id": "cindy-sherman-untitled-film-still-21-1978"}, "VcnU7cu6j5Y": {"duration": 204, "path": "khan/partner-content/pixar/sets/rotation/sets-8/", "keywords": "", "id": "VcnU7cu6j5Y", "title": "2. Geometry of rotation", "description": "Next lets build a diagram that break rotation into smaller parts. The next exercise will give us a chance to build our understanding of this diagram.\nClick here to learn about rotation using linear transformations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VcnU7cu6j5Y.mp4/VcnU7cu6j5Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VcnU7cu6j5Y.mp4/VcnU7cu6j5Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VcnU7cu6j5Y.m3u8/VcnU7cu6j5Y.m3u8"}, "slug": "sets-8", "video_id": "VcnU7cu6j5Y", "youtube_id": "VcnU7cu6j5Y", "readable_id": "sets-8"}, "DlBQcj_zQk0": {"duration": 409, "path": "khan/math/integral-calculus/sequences_series_approx_calc/power-series-algebra/power-series-radius-interval-convergence/", "keywords": "", "id": "DlBQcj_zQk0", "title": "Power series radius and interval of convergence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DlBQcj_zQk0.mp4/DlBQcj_zQk0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DlBQcj_zQk0.mp4/DlBQcj_zQk0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DlBQcj_zQk0.m3u8/DlBQcj_zQk0.m3u8"}, "slug": "power-series-radius-interval-convergence", "video_id": "DlBQcj_zQk0", "youtube_id": "DlBQcj_zQk0", "readable_id": "power-series-radius-interval-convergence"}, "GypHy3gnG5E": {"duration": 210, "path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/tax-deductions-introduction/", "keywords": "Tax, deduction, mortgage, interest", "id": "GypHy3gnG5E", "title": "Tax deductions introduction", "description": "Understanding what a tax deduction is", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GypHy3gnG5E.mp4/GypHy3gnG5E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GypHy3gnG5E.mp4/GypHy3gnG5E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GypHy3gnG5E.m3u8/GypHy3gnG5E.m3u8"}, "slug": "tax-deductions-introduction", "video_id": "GypHy3gnG5E", "youtube_id": "GypHy3gnG5E", "readable_id": "tax-deductions-introduction"}, "YRDpPeKc-ZE": {"duration": 450, "path": "khan/partner-content/big-history-project/life/how-did-life-begin-change/bhp-proved-asteroid-wiped-out-dinos/", "keywords": "", "id": "YRDpPeKc-ZE", "title": "How We Proved An Asteroid Wiped Out The Dinosaurs", "description": "Geologist Walter Alvarez gets to the bottom of a scientific murder mystery.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YRDpPeKc-ZE.mp4/YRDpPeKc-ZE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YRDpPeKc-ZE.mp4/YRDpPeKc-ZE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YRDpPeKc-ZE.m3u8/YRDpPeKc-ZE.m3u8"}, "slug": "bhp-proved-asteroid-wiped-out-dinos", "video_id": "YRDpPeKc-ZE", "youtube_id": "YRDpPeKc-ZE", "readable_id": "bhp-proved-asteroid-wiped-out-dinos"}, "-05OfTp6ZEE": {"duration": 597, "path": "khan/humanities/history/american-civics/american-civics/deficit-and-debt-ceiling/", "keywords": "debt, ceiling, finance, deficit, economics", "id": "-05OfTp6ZEE", "title": "Deficit and debt ceiling", "description": "Basic of the deficit, debt and debt ceiling", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-05OfTp6ZEE.mp4/-05OfTp6ZEE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-05OfTp6ZEE.mp4/-05OfTp6ZEE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-05OfTp6ZEE.m3u8/-05OfTp6ZEE.m3u8"}, "slug": "deficit-and-debt-ceiling", "video_id": "-05OfTp6ZEE", "youtube_id": "-05OfTp6ZEE", "readable_id": "deficit-and-debt-ceiling"}, "EgTd7OSTO1I": {"duration": 530, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/nomenclature-and-properties-of-amides/", "keywords": "", "id": "EgTd7OSTO1I", "title": "Nomenclature and properties of amides", "description": "How to name amides and the physical properties of acetamide", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EgTd7OSTO1I.mp4/EgTd7OSTO1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EgTd7OSTO1I.mp4/EgTd7OSTO1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EgTd7OSTO1I.m3u8/EgTd7OSTO1I.m3u8"}, "slug": "nomenclature-and-properties-of-amides", "video_id": "EgTd7OSTO1I", "youtube_id": "EgTd7OSTO1I", "readable_id": "nomenclature-and-properties-of-amides"}, "8GQvMt-ow4w": {"duration": 550, "path": "khan/science/physics/thermodynamics/specific-heat-and-heat-transfer/thermal-conduction-convection-and-radiation/", "keywords": "education,online learning,learning,lessons,fire,convection,thermal,radiation,conduction", "id": "8GQvMt-ow4w", "title": "Thermal conduction, convection, and radiation", "description": "Fire as thermal conduction, convection, and radiation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8GQvMt-ow4w.mp4/8GQvMt-ow4w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8GQvMt-ow4w.mp4/8GQvMt-ow4w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8GQvMt-ow4w.m3u8/8GQvMt-ow4w.m3u8"}, "slug": "thermal-conduction-convection-and-radiation", "video_id": "8GQvMt-ow4w", "youtube_id": "8GQvMt-ow4w", "readable_id": "thermal-conduction-convection-and-radiation"}, "Y6ENEA7FzvU": {"duration": 383, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-polio/poliomyelitis-diagnosis-and-treatment/", "keywords": "", "id": "Y6ENEA7FzvU", "title": "Poliomyelitis diagnosis and treatment", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y6ENEA7FzvU.mp4/Y6ENEA7FzvU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y6ENEA7FzvU.mp4/Y6ENEA7FzvU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y6ENEA7FzvU.m3u8/Y6ENEA7FzvU.m3u8"}, "slug": "poliomyelitis-diagnosis-and-treatment", "video_id": "Y6ENEA7FzvU", "youtube_id": "Y6ENEA7FzvU", "readable_id": "poliomyelitis-diagnosis-and-treatment"}, "QEUsZeKYsgo": {"duration": 420, "path": "khan/science/chemistry/oxidation-reduction/electrolytic-cell/quantitative-electrolysis/", "keywords": "", "id": "QEUsZeKYsgo", "title": "Quantitative electrolysis", "description": "Calculating how much zinc deposits on the zinc electrode after 1.0 h when a current of 5.0 A is applied to the battery.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QEUsZeKYsgo.mp4/QEUsZeKYsgo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QEUsZeKYsgo.mp4/QEUsZeKYsgo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QEUsZeKYsgo.m3u8/QEUsZeKYsgo.m3u8"}, "slug": "quantitative-electrolysis", "video_id": "QEUsZeKYsgo", "youtube_id": "QEUsZeKYsgo", "readable_id": "quantitative-electrolysis"}, "muC7HMIEYDU": {"duration": 280, "path": "khan/math/early-math/cc-early-math-measure-data-topic/cc-early-math-measuring-length/measuring-lengths-2/", "keywords": "", "id": "muC7HMIEYDU", "title": "Measuring lengths 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/muC7HMIEYDU.mp4/muC7HMIEYDU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/muC7HMIEYDU.mp4/muC7HMIEYDU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/muC7HMIEYDU.m3u8/muC7HMIEYDU.m3u8"}, "slug": "measuring-lengths-2", "video_id": "muC7HMIEYDU", "youtube_id": "muC7HMIEYDU", "readable_id": "measuring-lengths-2"}, "fMG6a6c6Jd4": {"duration": 326, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/complications-of-hypertension/", "keywords": "Complications Of Hypertension,Hypertension (Disease Or Medical Condition),Health (Industry)", "id": "fMG6a6c6Jd4", "title": "Complications of hypertension", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fMG6a6c6Jd4.mp4/fMG6a6c6Jd4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fMG6a6c6Jd4.mp4/fMG6a6c6Jd4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fMG6a6c6Jd4.m3u8/fMG6a6c6Jd4.m3u8"}, "slug": "complications-of-hypertension", "video_id": "fMG6a6c6Jd4", "youtube_id": "fMG6a6c6Jd4", "readable_id": "complications-of-hypertension"}, "VpLKdKkpg68": {"duration": 961, "path": "khan/science/health-and-medicine/health-care-system/medicare-overview/", "keywords": "medicare, medicaid", "id": "VpLKdKkpg68", "title": "Medicare overview", "description": "Sal talks with Professor Laurence Baker of Stanford Medical School", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VpLKdKkpg68.mp4/VpLKdKkpg68.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VpLKdKkpg68.mp4/VpLKdKkpg68.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VpLKdKkpg68.m3u8/VpLKdKkpg68.m3u8"}, "slug": "medicare-overview", "video_id": "VpLKdKkpg68", "youtube_id": "VpLKdKkpg68", "readable_id": "medicare-overview"}, "K7IxN3EDqm4": {"duration": 911, "path": "khan/test-prep/mcat/cells/eukaryotic-cells/mitochondria/", "keywords": "", "id": "K7IxN3EDqm4", "title": "Mitochondria", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K7IxN3EDqm4.mp4/K7IxN3EDqm4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K7IxN3EDqm4.mp4/K7IxN3EDqm4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K7IxN3EDqm4.m3u8/K7IxN3EDqm4.m3u8"}, "slug": "mitochondria", "video_id": "K7IxN3EDqm4", "youtube_id": "K7IxN3EDqm4", "readable_id": "mitochondria"}, "A57_63yP1UU": {"duration": 464, "path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/evaluating-line-integral-directly-part-1/", "keywords": "", "id": "A57_63yP1UU", "title": "Evaluating line integral directly - part 1", "description": "Showing that we didn't need to use Stokes' Theorem to evaluate this line integral", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A57_63yP1UU.mp4/A57_63yP1UU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A57_63yP1UU.mp4/A57_63yP1UU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A57_63yP1UU.m3u8/A57_63yP1UU.m3u8"}, "slug": "evaluating-line-integral-directly-part-1", "video_id": "A57_63yP1UU", "youtube_id": "A57_63yP1UU", "readable_id": "evaluating-line-integral-directly-part-1"}, "PMtC34pzKGc": {"duration": 290, "path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/visible-light-waves/", "keywords": "", "id": "PMtC34pzKGc", "title": "Visible light (1672)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PMtC34pzKGc.mp4/PMtC34pzKGc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PMtC34pzKGc.mp4/PMtC34pzKGc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PMtC34pzKGc.m3u8/PMtC34pzKGc.m3u8"}, "slug": "visible-light-waves", "video_id": "PMtC34pzKGc", "youtube_id": "PMtC34pzKGc", "readable_id": "visible-light-waves"}, "XdXXK_PTkUU": {"duration": 437, "path": "khan/humanities/art-history-basics/art-1010/greek-and-roman-art/", "keywords": "art history, ancient greece, ancient rome", "id": "XdXXK_PTkUU", "title": "Ancient Greek and Roman art", "description": "From the Utah System of Higher Education (with special thanks to Dr. Nancy Ross). Video by Ydraw.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XdXXK_PTkUU.mp4/XdXXK_PTkUU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XdXXK_PTkUU.mp4/XdXXK_PTkUU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XdXXK_PTkUU.m3u8/XdXXK_PTkUU.m3u8"}, "slug": "greek-and-roman-art", "video_id": "XdXXK_PTkUU", "youtube_id": "XdXXK_PTkUU", "readable_id": "greek-and-roman-art"}, "abYAUqs_n6I": {"duration": 839, "path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/dimension-of-the-null-space-or-nullity/", "keywords": "dimension, null, space, nullity", "id": "abYAUqs_n6I", "title": "Dimension of the null space or nullity", "description": "Dimension of the Null Space or Nullity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/abYAUqs_n6I.mp4/abYAUqs_n6I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/abYAUqs_n6I.mp4/abYAUqs_n6I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/abYAUqs_n6I.m3u8/abYAUqs_n6I.m3u8"}, "slug": "dimension-of-the-null-space-or-nullity", "video_id": "abYAUqs_n6I", "youtube_id": "abYAUqs_n6I", "readable_id": "dimension-of-the-null-space-or-nullity"}, "lQIVIYCZ4ec": {"duration": 347, "path": "khan/test-prep/mcat/society-and-culture/demographics/globalization-theories/", "keywords": "", "id": "lQIVIYCZ4ec", "title": "Globalization theories", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lQIVIYCZ4ec.mp4/lQIVIYCZ4ec.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lQIVIYCZ4ec.mp4/lQIVIYCZ4ec.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lQIVIYCZ4ec.m3u8/lQIVIYCZ4ec.m3u8"}, "slug": "globalization-theories", "video_id": "lQIVIYCZ4ec", "youtube_id": "lQIVIYCZ4ec", "readable_id": "globalization-theories"}, "V8C15AfL6Gk": {"duration": 151, "path": "khan/math/pre-algebra/fractions-pre-alg/dividing-fractions-pre-alg/my-share-of-soap-as-a-mixed-number-on-a-number-line/", "keywords": "", "id": "V8C15AfL6Gk", "title": "Mixed numbers on a number line", "description": "Understand 3/2 on the number line by thinking about it as a mixed number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/V8C15AfL6Gk.mp4/V8C15AfL6Gk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/V8C15AfL6Gk.mp4/V8C15AfL6Gk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/V8C15AfL6Gk.m3u8/V8C15AfL6Gk.m3u8"}, "slug": "my-share-of-soap-as-a-mixed-number-on-a-number-line", "video_id": "V8C15AfL6Gk", "youtube_id": "V8C15AfL6Gk", "readable_id": "my-share-of-soap-as-a-mixed-number-on-a-number-line"}, "DXEG8l1FRRk": {"duration": 799, "path": "khan/humanities/medieval-world/late-gothic-italy/pisa-rome/nicola-and-giovanni-pisano-1260-1301/", "keywords": "Pisano, Pulpit, art history, Florence, smarthistory", "id": "DXEG8l1FRRk", "title": "Nicola, Pulpit, Pisa Baptistery; and Giovanni Pisano, Slaughter of the Innocents, Pulpit, Sant'Andrea church, Pistoia", "description": "Nicola Pisano, Pulpit, Pisa Baptistery, 1260 Giovanni Pisano, Slaughter of the Innocents, Marble, 1301, Pulpit, Sant'Andrea church, Pistoia Speakers: Dr. David Drogin, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DXEG8l1FRRk.mp4/DXEG8l1FRRk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DXEG8l1FRRk.mp4/DXEG8l1FRRk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DXEG8l1FRRk.m3u8/DXEG8l1FRRk.m3u8"}, "slug": "nicola-and-giovanni-pisano-1260-1301", "video_id": "DXEG8l1FRRk", "youtube_id": "DXEG8l1FRRk", "readable_id": "nicola-and-giovanni-pisano-1260-1301"}, "uHaKyNplino": {"duration": 282, "path": "khan/math/pre-algebra/rates-and-ratios/metric-system-tutorial/converting-within-the-metric-system/", "keywords": "U06_L2_T2_we1, Converting, within, the, metric, system, CC_3_MD_8, CC_4_MD_1, CC_5_MD_1, CC_6_RP_3_d", "id": "uHaKyNplino", "title": "Converting within the metric system", "description": "Converting within the metric system", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uHaKyNplino.mp4/uHaKyNplino.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uHaKyNplino.mp4/uHaKyNplino.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uHaKyNplino.m3u8/uHaKyNplino.m3u8"}, "slug": "converting-within-the-metric-system", "video_id": "uHaKyNplino", "youtube_id": "uHaKyNplino", "readable_id": "converting-within-the-metric-system"}, "_JGdeRfJJ2U": {"duration": 601, "path": "khan/partner-content/big-history-project/early-humans/other-materials6/bhp-how-did-ancestors-evolve/", "keywords": "", "id": "_JGdeRfJJ2U", "title": "How Did Our Ancestors Evolve?", "description": "All life on earth shares a common ancestor. After the dinosaurs became extinct, biodiversity flourished.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_JGdeRfJJ2U.mp4/_JGdeRfJJ2U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_JGdeRfJJ2U.mp4/_JGdeRfJJ2U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_JGdeRfJJ2U.m3u8/_JGdeRfJJ2U.m3u8"}, "slug": "bhp-how-did-ancestors-evolve", "video_id": "_JGdeRfJJ2U", "youtube_id": "_JGdeRfJJ2U", "readable_id": "bhp-how-did-ancestors-evolve"}, "Z_DcXewHHA8": {"duration": 175, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-scenarios-tutorial/moderate-inflation-in-a-good-economy/", "keywords": "inflation, deflation, economic, cycles", "id": "Z_DcXewHHA8", "title": "Moderate inflation in a good economy", "description": "Why there tends to be moderate inflation during good economies", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z_DcXewHHA8.mp4/Z_DcXewHHA8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z_DcXewHHA8.mp4/Z_DcXewHHA8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z_DcXewHHA8.m3u8/Z_DcXewHHA8.m3u8"}, "slug": "moderate-inflation-in-a-good-economy", "video_id": "Z_DcXewHHA8", "youtube_id": "Z_DcXewHHA8", "readable_id": "moderate-inflation-in-a-good-economy"}, "Tx7Cwn5pgQo": {"duration": 398, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/core-alg-negative-exponents/thinking-more-about-negative-exponents/", "keywords": "", "id": "Tx7Cwn5pgQo", "title": "Thinking more about negative exponents", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Tx7Cwn5pgQo.mp4/Tx7Cwn5pgQo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Tx7Cwn5pgQo.mp4/Tx7Cwn5pgQo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Tx7Cwn5pgQo.m3u8/Tx7Cwn5pgQo.m3u8"}, "slug": "thinking-more-about-negative-exponents", "video_id": "Tx7Cwn5pgQo", "youtube_id": "Tx7Cwn5pgQo", "readable_id": "thinking-more-about-negative-exponents"}, "SL3I_RYjyZo": {"duration": 634, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/double-bohr-effect/", "keywords": "", "id": "SL3I_RYjyZo", "title": "Double Bohr effect", "description": "Learn how there are two distinct Bohr effects happening at the same time in the placenta. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SL3I_RYjyZo.mp4/SL3I_RYjyZo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SL3I_RYjyZo.mp4/SL3I_RYjyZo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SL3I_RYjyZo.m3u8/SL3I_RYjyZo.m3u8"}, "slug": "double-bohr-effect", "video_id": "SL3I_RYjyZo", "youtube_id": "SL3I_RYjyZo", "readable_id": "double-bohr-effect"}, "eL965_Lscb8": {"duration": 519, "path": "khan/math/probability/random-variables-topic/binomial_distribution/free-throw-binomial-probability-distribution/", "keywords": "", "id": "eL965_Lscb8", "title": "Free throw binomial probability distribution", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eL965_Lscb8.mp4/eL965_Lscb8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eL965_Lscb8.mp4/eL965_Lscb8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eL965_Lscb8.m3u8/eL965_Lscb8.m3u8"}, "slug": "free-throw-binomial-probability-distribution", "video_id": "eL965_Lscb8", "youtube_id": "eL965_Lscb8", "readable_id": "free-throw-binomial-probability-distribution"}, "HahjsBApxLE": {"duration": 644, "path": "khan/science/physics/geometric-optics/reflection-refraction/snell-s-law-examples-1/", "keywords": "Snell's, Law, Examples", "id": "HahjsBApxLE", "title": "Snell's law example 1", "description": "Snell's Law Example 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HahjsBApxLE.mp4/HahjsBApxLE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HahjsBApxLE.mp4/HahjsBApxLE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HahjsBApxLE.m3u8/HahjsBApxLE.m3u8"}, "slug": "snell-s-law-examples-1", "video_id": "HahjsBApxLE", "youtube_id": "HahjsBApxLE", "readable_id": "snell-s-law-examples-1"}, "NG-rrorZcM8": {"duration": 534, "path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/atomic-weight-and-atomic-mass/", "keywords": "", "id": "NG-rrorZcM8", "title": "Atomic weight and atomic mass", "description": "The difference between atomic weight and atomic mass in chemistry, and how it compares to the physics definitions of weight and mass.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NG-rrorZcM8.mp4/NG-rrorZcM8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NG-rrorZcM8.mp4/NG-rrorZcM8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NG-rrorZcM8.m3u8/NG-rrorZcM8.m3u8"}, "slug": "atomic-weight-and-atomic-mass", "video_id": "NG-rrorZcM8", "youtube_id": "NG-rrorZcM8", "readable_id": "atomic-weight-and-atomic-mass"}, "TmFET3F64pE": {"duration": 380, "path": "khan/humanities/history/euro-hist/ww1-aftermath/more-detail-on-the-treaty-of-versailles-and-germany/", "keywords": "", "id": "TmFET3F64pE", "title": "More detail on the Treaty of Versailles and Germany", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TmFET3F64pE.mp4/TmFET3F64pE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TmFET3F64pE.mp4/TmFET3F64pE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TmFET3F64pE.m3u8/TmFET3F64pE.m3u8"}, "slug": "more-detail-on-the-treaty-of-versailles-and-germany", "video_id": "TmFET3F64pE", "youtube_id": "TmFET3F64pE", "readable_id": "more-detail-on-the-treaty-of-versailles-and-germany"}, "_UrfHFEBIpU": {"duration": 619, "path": "khan/test-prep/mcat/physical-processes/force-of-tension/introduction-to-tension/", "keywords": "tension, force, vectors, physics, mass, newton, trigonometry", "id": "_UrfHFEBIpU", "title": "Introduction to tension", "description": "An introduction to tension. Solving for the tension(s) in a set of wires when a weight is hanging from them.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_UrfHFEBIpU.mp4/_UrfHFEBIpU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_UrfHFEBIpU.mp4/_UrfHFEBIpU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_UrfHFEBIpU.m3u8/_UrfHFEBIpU.m3u8"}, "slug": "introduction-to-tension", "video_id": "_UrfHFEBIpU", "youtube_id": "_UrfHFEBIpU", "readable_id": "introduction-to-tension"}, "omvNINaRdxg": {"duration": 566, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial/stellar-parallax/", "keywords": "stellar, parallax", "id": "omvNINaRdxg", "title": "Stellar parallax", "description": "Another version of the stellar parallax introduction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/omvNINaRdxg.mp4/omvNINaRdxg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/omvNINaRdxg.mp4/omvNINaRdxg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/omvNINaRdxg.m3u8/omvNINaRdxg.m3u8"}, "slug": "stellar-parallax", "video_id": "omvNINaRdxg", "youtube_id": "omvNINaRdxg", "readable_id": "stellar-parallax"}, "NX0ZPtB_QFY": {"duration": 603, "path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/nucleic-acid-structure-1/", "keywords": "", "id": "NX0ZPtB_QFY", "title": "Nucleic acid structure 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NX0ZPtB_QFY.mp4/NX0ZPtB_QFY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NX0ZPtB_QFY.mp4/NX0ZPtB_QFY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NX0ZPtB_QFY.m3u8/NX0ZPtB_QFY.m3u8"}, "slug": "nucleic-acid-structure-1", "video_id": "NX0ZPtB_QFY", "youtube_id": "NX0ZPtB_QFY", "readable_id": "nucleic-acid-structure-1"}, "dstNU7It-Ro": {"duration": 402, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/simplifying-rational-expressions-2/", "keywords": "U11_L1_T1_we2, Simplifying, Rational, Expressions, CC_39336_A-APR_6, CC_39336_A-APR_7, CC_39336_A-CED_1, CC_39336_A-REI_2, CC_39336_A-SSE_2, CC_39336_F-IF_5", "id": "dstNU7It-Ro", "title": "How to simplify a rational expressions using advanced factorization methods (example)", "description": "Sal\u00a0simplifies and states the domain of (2x^2+13x+20)/(2x^2+17x+30).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dstNU7It-Ro.mp4/dstNU7It-Ro.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dstNU7It-Ro.mp4/dstNU7It-Ro.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dstNU7It-Ro.m3u8/dstNU7It-Ro.m3u8"}, "slug": "simplifying-rational-expressions-2", "video_id": "dstNU7It-Ro", "youtube_id": "dstNU7It-Ro", "readable_id": "simplifying-rational-expressions-2"}, "dYAoiLhOuao": {"duration": 487, "path": "khan/partner-content/wi-phi/metaphys-epistemology/ship-of-theseus/", "keywords": "", "id": "dYAoiLhOuao", "title": "Metaphysics: Ship of Theseus", "description": "Jenn introduces us to a puzzle that has bedeviled philosophy since the ancient Greeks: the Ship of Theseus. She tells the Ship of Theseus story, and draws out the more general question behind it: what does it take for an object to persist over time? She then breaks this ancient problem down with modern clarity and rigor.\n\nSpeaker: Dr.\u00a0Jennifer Wang, Lecturer, Stanford University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dYAoiLhOuao.mp4/dYAoiLhOuao.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dYAoiLhOuao.mp4/dYAoiLhOuao.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dYAoiLhOuao.m3u8/dYAoiLhOuao.m3u8"}, "slug": "ship-of-theseus", "video_id": "dYAoiLhOuao", "youtube_id": "dYAoiLhOuao", "readable_id": "ship-of-theseus"}, "913Pj5AxmHQ": {"duration": 327, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/treatment-of-hypertension/", "keywords": "Hypertension (Disease Or Medical Condition),Health (Industry)", "id": "913Pj5AxmHQ", "title": "Treatment of hypertension", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/913Pj5AxmHQ.mp4/913Pj5AxmHQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/913Pj5AxmHQ.mp4/913Pj5AxmHQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/913Pj5AxmHQ.m3u8/913Pj5AxmHQ.m3u8"}, "slug": "treatment-of-hypertension", "video_id": "913Pj5AxmHQ", "youtube_id": "913Pj5AxmHQ", "readable_id": "treatment-of-hypertension"}, "JJawhaMqaXg": {"duration": 159, "path": "khan/math/algebra-basics/core-algebra-foundations/algebra-foundations-decimal-operations/ordering-decimals-example/", "keywords": "", "id": "JJawhaMqaXg", "title": "Comparing decimals: ordering from least to greatest", "description": "This is a fun example where we reorder decimals from smallest to largest. You're looking for the place value that is the most signifiant, and then working backwards.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JJawhaMqaXg.mp4/JJawhaMqaXg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JJawhaMqaXg.mp4/JJawhaMqaXg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JJawhaMqaXg.m3u8/JJawhaMqaXg.m3u8"}, "slug": "ordering-decimals-example", "video_id": "JJawhaMqaXg", "youtube_id": "JJawhaMqaXg", "readable_id": "ordering-decimals-example"}, "nZ90fsoVvmc": {"duration": 296, "path": "khan/test-prep/gmat/problem-solving/gmat-math-48/", "keywords": "GMAT, Math, problem, solving", "id": "nZ90fsoVvmc", "title": "GMAT: Math 48", "description": "226, pg. 183", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nZ90fsoVvmc.mp4/nZ90fsoVvmc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nZ90fsoVvmc.mp4/nZ90fsoVvmc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nZ90fsoVvmc.m3u8/nZ90fsoVvmc.m3u8"}, "slug": "gmat-math-48", "video_id": "nZ90fsoVvmc", "youtube_id": "nZ90fsoVvmc", "readable_id": "gmat-math-48"}, "LMfPceMzLWg": {"duration": 155, "path": "khan/computing/computer-programming/programming-natural-simulations/intro-natural-simulations/welcome-natural-simulations/", "keywords": "", "id": "LMfPceMzLWg", "title": "Welcome to Natural Simulations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LMfPceMzLWg.mp4/LMfPceMzLWg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LMfPceMzLWg.mp4/LMfPceMzLWg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LMfPceMzLWg.m3u8/LMfPceMzLWg.m3u8"}, "slug": "welcome-natural-simulations", "video_id": "LMfPceMzLWg", "youtube_id": "LMfPceMzLWg", "readable_id": "welcome-natural-simulations"}, "xGTTT6nG3Ns": {"duration": 169, "path": "khan/humanities/art-americas/us-art-19c/realism-us/sea-change/", "keywords": "canvas, community, control, nature, painting, turmoil, North America", "id": "xGTTT6nG3Ns", "title": "Homer, Northeaster", "description": "Met curator H. Barbara Weinberg on the power of nature in Winslow Homer\u2019s Northeaster,\u00a01895; reworked by 1901.\n\nView this work on the metmuseum.org.\u00a0\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit\u00a0Find an Educator Resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xGTTT6nG3Ns.mp4/xGTTT6nG3Ns.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xGTTT6nG3Ns.mp4/xGTTT6nG3Ns.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xGTTT6nG3Ns.m3u8/xGTTT6nG3Ns.m3u8"}, "slug": "sea-change", "video_id": "xGTTT6nG3Ns", "youtube_id": "xGTTT6nG3Ns", "readable_id": "sea-change"}, "p5nej7Gy7kQ": {"duration": 204, "path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/moma-ad-reinhardt/", "keywords": "", "id": "p5nej7Gy7kQ", "title": "Ad Reinhardt", "description": "Take time with Ad Reinhardt's black canvases and discover the rewards of contemplation. To learn more and create your own works, take our online course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p5nej7Gy7kQ.mp4/p5nej7Gy7kQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p5nej7Gy7kQ.mp4/p5nej7Gy7kQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p5nej7Gy7kQ.m3u8/p5nej7Gy7kQ.m3u8"}, "slug": "moma-ad-reinhardt", "video_id": "p5nej7Gy7kQ", "youtube_id": "p5nej7Gy7kQ", "readable_id": "moma-ad-reinhardt"}, "cdRLBOnLTDk": {"duration": 131, "path": "khan/math/precalculus/prob_comb/basic_prob_precalc/events-and-outcomes-1/", "keywords": "U12_L2_T1_we1, Events, and, Outcomes, CC_7_SP_5, CC_7_SP_6, CC_7_SP_7, CC_7_SP_7_a, CC_7_SP_7_b", "id": "cdRLBOnLTDk", "title": "Finding probablity example 3", "description": "Now we're working out the probability of randomly selecting a yellow marble from a bag of multi-colored marbles. Let's practice together.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cdRLBOnLTDk.mp4/cdRLBOnLTDk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cdRLBOnLTDk.mp4/cdRLBOnLTDk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cdRLBOnLTDk.m3u8/cdRLBOnLTDk.m3u8"}, "slug": "events-and-outcomes-1", "video_id": "cdRLBOnLTDk", "youtube_id": "cdRLBOnLTDk", "readable_id": "events-and-outcomes-1"}, "XWq8bplP-_E": {"duration": 229, "path": "khan/math/pre-algebra/factors-multiples/prime_factorization/prime-factorization-exercise/", "keywords": "", "id": "XWq8bplP-_E", "title": "Prime factorization exercise", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XWq8bplP-_E.mp4/XWq8bplP-_E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XWq8bplP-_E.mp4/XWq8bplP-_E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XWq8bplP-_E.m3u8/XWq8bplP-_E.m3u8"}, "slug": "prime-factorization-exercise", "video_id": "XWq8bplP-_E", "youtube_id": "XWq8bplP-_E", "readable_id": "prime-factorization-exercise"}, "vMTe6qXUHVs": {"duration": 387, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/early-methods-of-studying-the-brain/", "keywords": "", "id": "vMTe6qXUHVs", "title": "Early methods of studying the brain", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vMTe6qXUHVs.mp4/vMTe6qXUHVs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vMTe6qXUHVs.mp4/vMTe6qXUHVs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vMTe6qXUHVs.m3u8/vMTe6qXUHVs.m3u8"}, "slug": "early-methods-of-studying-the-brain", "video_id": "vMTe6qXUHVs", "youtube_id": "vMTe6qXUHVs", "readable_id": "early-methods-of-studying-the-brain"}, "u1UKIljUWuc": {"duration": 526, "path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/integral-test-intuition/", "keywords": "", "id": "u1UKIljUWuc", "title": "Integral test intuition", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u1UKIljUWuc.mp4/u1UKIljUWuc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u1UKIljUWuc.mp4/u1UKIljUWuc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u1UKIljUWuc.m3u8/u1UKIljUWuc.m3u8"}, "slug": "integral-test-intuition", "video_id": "u1UKIljUWuc", "youtube_id": "u1UKIljUWuc", "readable_id": "integral-test-intuition"}, "9Wb-T1F033Q": {"duration": 723, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/making-spanish-polychrome-sculpture/", "keywords": "", "id": "9Wb-T1F033Q", "title": "Making a Spanish polychrome sculpture", "description": "17th Century Spanish polychrome sculpture can achieve remarkable realism. Learn about the techniques estofado\u2014painting and incising to portray silk fabrics, and encarnaciones\u2014for the hair and skin. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9Wb-T1F033Q.mp4/9Wb-T1F033Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9Wb-T1F033Q.mp4/9Wb-T1F033Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9Wb-T1F033Q.m3u8/9Wb-T1F033Q.m3u8"}, "slug": "making-spanish-polychrome-sculpture", "video_id": "9Wb-T1F033Q", "youtube_id": "9Wb-T1F033Q", "readable_id": "making-spanish-polychrome-sculpture"}, "1AZnFszUroI": {"duration": 405, "path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/the-vestibular-system-balance-and-dizziness/", "keywords": "", "id": "1AZnFszUroI", "title": "The vestibular system, balance, and dizziness", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1AZnFszUroI.mp4/1AZnFszUroI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1AZnFszUroI.mp4/1AZnFszUroI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1AZnFszUroI.m3u8/1AZnFszUroI.m3u8"}, "slug": "the-vestibular-system-balance-and-dizziness", "video_id": "1AZnFszUroI", "youtube_id": "1AZnFszUroI", "readable_id": "the-vestibular-system-balance-and-dizziness"}, "iEKA0jUstPs": {"duration": 723, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/hydrohalogenation/", "keywords": "", "id": "iEKA0jUstPs", "title": "Hydrohalogenation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iEKA0jUstPs.mp4/iEKA0jUstPs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iEKA0jUstPs.mp4/iEKA0jUstPs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iEKA0jUstPs.m3u8/iEKA0jUstPs.m3u8"}, "slug": "hydrohalogenation", "video_id": "iEKA0jUstPs", "youtube_id": "iEKA0jUstPs", "readable_id": "hydrohalogenation"}, "yV4Xa8Xtmrc": {"duration": 372, "path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/cosine-angle-addition/", "keywords": "", "id": "yV4Xa8Xtmrc", "title": "Angle addition formula with cosine", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yV4Xa8Xtmrc.mp4/yV4Xa8Xtmrc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yV4Xa8Xtmrc.mp4/yV4Xa8Xtmrc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yV4Xa8Xtmrc.m3u8/yV4Xa8Xtmrc.m3u8"}, "slug": "cosine-angle-addition", "video_id": "yV4Xa8Xtmrc", "youtube_id": "yV4Xa8Xtmrc", "readable_id": "cosine-angle-addition"}, "RhyJGwNpEcw": {"duration": 316, "path": "khan/partner-content/wi-phi/critical-thinking/peak-end-effect/", "keywords": "Critical Thinking (Literature Subject),Cognitive Bias,Psychology (Field Of Study),Behavioral Economics (Field Of Study),Cognitive Psychology (Field Of Study),Cognitive Science (Field Of Study),Laurie Santos,Yale University (College/University),Khan Academy (Nonprofit Organization),Wireless Philosophy,Wiphi,Philosophy (Field Of Study),Peak-End Effect", "id": "RhyJGwNpEcw", "title": "Cognitive Biases: Peak-End Effect", "description": "In this video, Laurie Santos (Yale University) explains why our memories of good and bad events are a biased. Specifically, she explains how our retrospective evaluations fall prey to the peak-end effect\u2014 a bias in which we overweight the peak and end of our everyday experiences\u2014 and how this bias leads us to ignore other features of the event like its duration.\n\nSpeaker: Dr.\u00a0Laurie Santos, Associate Professor of Psychology, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RhyJGwNpEcw.mp4/RhyJGwNpEcw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RhyJGwNpEcw.mp4/RhyJGwNpEcw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RhyJGwNpEcw.m3u8/RhyJGwNpEcw.m3u8"}, "slug": "peak-end-effect", "video_id": "RhyJGwNpEcw", "youtube_id": "RhyJGwNpEcw", "readable_id": "peak-end-effect"}, "QpcACa39YtA": {"duration": 532, "path": "khan/test-prep/mcat/cells/cell-membrane-overview/cell-membrane-introduction/", "keywords": "", "id": "QpcACa39YtA", "title": "Cell membrane introduction", "description": "Learn about how phospholipids form the cell membrane, and what types of molecules can passively diffuse thorugh the membrane. By William Tsai.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QpcACa39YtA.mp4/QpcACa39YtA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QpcACa39YtA.mp4/QpcACa39YtA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QpcACa39YtA.m3u8/QpcACa39YtA.m3u8"}, "slug": "cell-membrane-introduction", "video_id": "QpcACa39YtA", "youtube_id": "QpcACa39YtA", "readable_id": "cell-membrane-introduction"}, "JCKshDyxjuw": {"duration": 235, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/claude-monet-poplars-1891/", "keywords": "Claude Monet, Poplars, 1891, Philadelphia Museum of Art, Philadelphia, Monet, series, Impressionism, light, fleeting, landscape, art, painting, art history, Smarthistory, Khan Academy, Google Art Project, OER, education", "id": "JCKshDyxjuw", "title": "Monet, Poplars", "description": "Claude Monet, Poplars, 1891, oil on canvas, 36-5/8 x 29-3/16 inches / 93 x 74.1 cm (Philadelphia Museum of Art)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JCKshDyxjuw.mp4/JCKshDyxjuw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JCKshDyxjuw.mp4/JCKshDyxjuw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JCKshDyxjuw.m3u8/JCKshDyxjuw.m3u8"}, "slug": "claude-monet-poplars-1891", "video_id": "JCKshDyxjuw", "youtube_id": "JCKshDyxjuw", "readable_id": "claude-monet-poplars-1891"}, "OY79AuGZDNI": {"duration": 204, "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/akkadian/victory-stele-of-naram-sin-2254-2218-b-c-e/", "keywords": "Naram-Sin, Ancient Near East, Akkad, Akkadian, art history, history of art, smarthistory, Louvre", "id": "OY79AuGZDNI", "title": "Victory Stele of Naram-Sin", "description": "Victory Stele of Naram-Sin, Akkadian, pink limestone, 2254-2218 B.C.E. (Louvre, Paris) This monument depicts the Akkadian victory over the Lullubi Mountain people. In the 12th century B.C.E., 1,000 years after it was originally made, the Elamite king, Shutruk-Nahhunte, attacked Babylon and, according to his later inscription, the stele was taken to Susa in what is now Iran. A stele is a vertical stone monument or marker often inscribed with text or relief carving. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OY79AuGZDNI.mp4/OY79AuGZDNI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OY79AuGZDNI.mp4/OY79AuGZDNI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OY79AuGZDNI.m3u8/OY79AuGZDNI.m3u8"}, "slug": "victory-stele-of-naram-sin-2254-2218-b-c-e", "video_id": "OY79AuGZDNI", "youtube_id": "OY79AuGZDNI", "readable_id": "victory-stele-of-naram-sin-2254-2218-b-c-e"}, "A_ToB9T-de8": {"duration": 37, "path": "khan/science/discoveries-projects/discoveries/measure-magnets/are-two-magnets-stronger-than-one/", "keywords": "magnetic force", "id": "A_ToB9T-de8", "title": "Are 2 magnets stronger than 1?", "description": "Will the power of two magnets stuck together increase the overall force? Why?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A_ToB9T-de8.mp4/A_ToB9T-de8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A_ToB9T-de8.mp4/A_ToB9T-de8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A_ToB9T-de8.m3u8/A_ToB9T-de8.m3u8"}, "slug": "are-two-magnets-stronger-than-one", "video_id": "A_ToB9T-de8", "youtube_id": "A_ToB9T-de8", "readable_id": "are-two-magnets-stronger-than-one"}, "QhuJn8YBtmg": {"duration": 564, "path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/introduction-to-torque/", "keywords": "physics, torque, rotation", "id": "QhuJn8YBtmg", "title": "Introduction to torque", "description": "An introduction to torque", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QhuJn8YBtmg.mp4/QhuJn8YBtmg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QhuJn8YBtmg.mp4/QhuJn8YBtmg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QhuJn8YBtmg.m3u8/QhuJn8YBtmg.m3u8"}, "slug": "introduction-to-torque", "video_id": "QhuJn8YBtmg", "youtube_id": "QhuJn8YBtmg", "readable_id": "introduction-to-torque"}, "TEysuDHExc4": {"duration": 338, "path": "khan/partner-content/big-history-project/stars-and-elements/creation-complex-elements/bhp-navigating-periodic-table/", "keywords": "", "id": "TEysuDHExc4", "title": "Navigating the Periodic Table", "description": "Learn the basic organization of the periodic table and what it tells us about the chemical elements.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TEysuDHExc4.mp4/TEysuDHExc4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TEysuDHExc4.mp4/TEysuDHExc4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TEysuDHExc4.m3u8/TEysuDHExc4.m3u8"}, "slug": "bhp-navigating-periodic-table", "video_id": "TEysuDHExc4", "youtube_id": "TEysuDHExc4", "readable_id": "bhp-navigating-periodic-table"}, "WcpvoJAT_as": {"duration": 173, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h6-harder/", "keywords": "", "id": "WcpvoJAT_as", "title": "Solving linear equations and linear inequalities \u2014 Harder example", "description": "Watch Sal work through a harder Solving linear equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WcpvoJAT_as.mp4/WcpvoJAT_as.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WcpvoJAT_as.mp4/WcpvoJAT_as.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WcpvoJAT_as.m3u8/WcpvoJAT_as.m3u8"}, "slug": "sat-math-h6-harder", "video_id": "WcpvoJAT_as", "youtube_id": "WcpvoJAT_as", "readable_id": "sat-math-h6-harder"}, "a16uKH2K7gM": {"duration": 312, "path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-a-dvd-player-2-of-5/", "keywords": "digital video disk, DVD, player, power supply, SMPS, switch mode power supply, high frequency, DC to DC transformer, bridge rectifier, smoothing capacitor, electrolytic capacitor, ceramic disk capacitor, diode, opto coupler, integrated circuit, power regul", "id": "a16uKH2K7gM", "title": "What is inside a DVD player? (2 of 5)", "description": "In this video we explore the power supply inside a DVD player.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a16uKH2K7gM.mp4/a16uKH2K7gM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a16uKH2K7gM.mp4/a16uKH2K7gM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a16uKH2K7gM.m3u8/a16uKH2K7gM.m3u8"}, "slug": "what-is-inside-a-dvd-player-2-of-5", "video_id": "a16uKH2K7gM", "youtube_id": "a16uKH2K7gM", "readable_id": "what-is-inside-a-dvd-player-2-of-5"}, "6f553BGaufI": {"duration": 442, "path": "khan/science/physics/thermodynamics/specific-heat-and-heat-transfer/thermal-conductivity-of-metal-and-wood/", "keywords": "education,online learning,learning,lessons,thermal,conduction,thermal conductivity", "id": "6f553BGaufI", "title": "Thermal conductivity of metal and wood", "description": "Why metal at room temperature feels cooler than wood at room temperature.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6f553BGaufI.mp4/6f553BGaufI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6f553BGaufI.mp4/6f553BGaufI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6f553BGaufI.m3u8/6f553BGaufI.m3u8"}, "slug": "thermal-conductivity-of-metal-and-wood", "video_id": "6f553BGaufI", "youtube_id": "6f553BGaufI", "readable_id": "thermal-conductivity-of-metal-and-wood"}, "3h4UK62Qrbo": {"duration": 280, "path": "khan/math/pre-algebra/factors-multiples/prime_numbers/recognizing-prime-numbers/", "keywords": "U02_L1_T3_we4, Recognizing, Prime, Numbers", "id": "3h4UK62Qrbo", "title": "Recognizing prime and composite numbers", "description": "Can you recognize the prime numbers in this group of numbers? Which are prime, composite, or neither?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3h4UK62Qrbo.mp4/3h4UK62Qrbo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3h4UK62Qrbo.mp4/3h4UK62Qrbo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3h4UK62Qrbo.m3u8/3h4UK62Qrbo.m3u8"}, "slug": "recognizing-prime-numbers", "video_id": "3h4UK62Qrbo", "youtube_id": "3h4UK62Qrbo", "readable_id": "recognizing-prime-numbers"}, "GvgJ2_7P9SA": {"duration": 139, "path": "khan/math/pre-algebra/fractions-pre-alg/mult-fracs-word-probs-pre-alg/multiplying-fractions-word-problem-3/", "keywords": "", "id": "GvgJ2_7P9SA", "title": "Multiplying fractions word problem: milk love", "description": "Who doesn't love milk? Our family sure does. Let's figure out how much milk is consumed each month if each person consumes a fractional amount of milk.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GvgJ2_7P9SA.mp4/GvgJ2_7P9SA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GvgJ2_7P9SA.mp4/GvgJ2_7P9SA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GvgJ2_7P9SA.m3u8/GvgJ2_7P9SA.m3u8"}, "slug": "multiplying-fractions-word-problem-3", "video_id": "GvgJ2_7P9SA", "youtube_id": "GvgJ2_7P9SA", "readable_id": "multiplying-fractions-word-problem-3"}, "HDOJe3JPmJM": {"duration": 541, "path": "khan/test-prep/mcat/behavior/psychological-disorders/sleep-wake-disorders-breathing-related-sleep-disorders-2/", "keywords": "Sleep Disorder (Symptom),Sleep (Quotation Subject),Non-24-hour Sleep\u2013wake Disorder (Disease Or Medical Condition),Irregular Sleep\u2013wake Rhythm,Health (Industry),Mental Illness (Disease Or Medical Condition)", "id": "HDOJe3JPmJM", "title": "Sleep wake disorders breathing related sleep disorders", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HDOJe3JPmJM.mp4/HDOJe3JPmJM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HDOJe3JPmJM.mp4/HDOJe3JPmJM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HDOJe3JPmJM.m3u8/HDOJe3JPmJM.m3u8"}, "slug": "sleep-wake-disorders-breathing-related-sleep-disorders-2", "video_id": "HDOJe3JPmJM", "youtube_id": "HDOJe3JPmJM", "readable_id": "sleep-wake-disorders-breathing-related-sleep-disorders-2"}, "7qAld9bGwlA": {"duration": 241, "path": "khan/test-prep/mcat/social-inequality/social-class/health-and-healthcare-disparities-in-the-us/", "keywords": "", "id": "7qAld9bGwlA", "title": "Health and healthcare disparities in the US", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7qAld9bGwlA.mp4/7qAld9bGwlA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7qAld9bGwlA.mp4/7qAld9bGwlA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7qAld9bGwlA.m3u8/7qAld9bGwlA.m3u8"}, "slug": "health-and-healthcare-disparities-in-the-us", "video_id": "7qAld9bGwlA", "youtube_id": "7qAld9bGwlA", "readable_id": "health-and-healthcare-disparities-in-the-us"}, "SjQG3rKSZUQ": {"duration": 596, "path": "khan/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/stoichiometry/", "keywords": "chemistry, reagent, reactant, stoichiometry", "id": "SjQG3rKSZUQ", "title": "Stoichiometry", "description": "Introduction to stoichiometry. Using the balanced reaction to find molar ratios.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SjQG3rKSZUQ.mp4/SjQG3rKSZUQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SjQG3rKSZUQ.mp4/SjQG3rKSZUQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SjQG3rKSZUQ.m3u8/SjQG3rKSZUQ.m3u8"}, "slug": "stoichiometry", "video_id": "SjQG3rKSZUQ", "youtube_id": "SjQG3rKSZUQ", "readable_id": "stoichiometry"}, "dTsUyXXudvA": {"duration": 490, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/how-does-lung-volume-change/", "keywords": "", "id": "dTsUyXXudvA", "title": "How does lung volume change?", "description": "Learn about how muscle contraction and lung recoil actually help the lungs change their volume with every breath! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dTsUyXXudvA.mp4/dTsUyXXudvA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dTsUyXXudvA.mp4/dTsUyXXudvA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dTsUyXXudvA.m3u8/dTsUyXXudvA.m3u8"}, "slug": "how-does-lung-volume-change", "video_id": "dTsUyXXudvA", "youtube_id": "dTsUyXXudvA", "readable_id": "how-does-lung-volume-change"}, "PpvexFbd8e8": {"duration": 220, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells/ependymal-cells/", "keywords": "", "id": "PpvexFbd8e8", "title": "Ependymal cells", "description": "This video describes the structure and function of ependymal cells.\u00a0 By Matt Jensen.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PpvexFbd8e8.mp4/PpvexFbd8e8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PpvexFbd8e8.mp4/PpvexFbd8e8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PpvexFbd8e8.m3u8/PpvexFbd8e8.m3u8"}, "slug": "ependymal-cells", "video_id": "PpvexFbd8e8", "youtube_id": "PpvexFbd8e8", "readable_id": "ependymal-cells"}, "QlM21sl-TDg": {"duration": 742, "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/spin-spin-splitting-coupling/", "keywords": "", "id": "QlM21sl-TDg", "title": "Spin-spin splitting (coupling)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QlM21sl-TDg.mp4/QlM21sl-TDg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QlM21sl-TDg.mp4/QlM21sl-TDg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QlM21sl-TDg.m3u8/QlM21sl-TDg.m3u8"}, "slug": "spin-spin-splitting-coupling", "video_id": "QlM21sl-TDg", "youtube_id": "QlM21sl-TDg", "readable_id": "spin-spin-splitting-coupling"}, "BDWqwcTtZa0": {"duration": 1025, "path": "khan/humanities/history/1600s-1800s/french-revolution-tutorial/french-revolution-part-1/", "keywords": "history, french, revolution, bastille", "id": "BDWqwcTtZa0", "title": "French Revolution (part 1)", "description": "Part 1 of the French Revolution. From the Convocation of the Estates General to the storming of the Bastille", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BDWqwcTtZa0.mp4/BDWqwcTtZa0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BDWqwcTtZa0.mp4/BDWqwcTtZa0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BDWqwcTtZa0.m3u8/BDWqwcTtZa0.m3u8"}, "slug": "french-revolution-part-1", "video_id": "BDWqwcTtZa0", "youtube_id": "BDWqwcTtZa0", "readable_id": "french-revolution-part-1"}, "AcpIO62x2oo": {"duration": 341, "path": "khan/math/pre-algebra/negatives-absolute-value-pre-alg/add-subtract-negatives-pre-alg/adding-negative-numbers/", "keywords": "u9_l2_t1_we1, Adding, Negative, Numbers", "id": "AcpIO62x2oo", "title": "Adding negative numbers (example)", "description": "Use a number line to add -15 + (-46) + (-29)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AcpIO62x2oo.mp4/AcpIO62x2oo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AcpIO62x2oo.mp4/AcpIO62x2oo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AcpIO62x2oo.m3u8/AcpIO62x2oo.m3u8"}, "slug": "adding-negative-numbers", "video_id": "AcpIO62x2oo", "youtube_id": "AcpIO62x2oo", "readable_id": "adding-negative-numbers"}, "Je4GicbcyLU": {"duration": 144, "path": "khan/partner-content/pixar/sets/rotation/set-7/", "keywords": "", "id": "Je4GicbcyLU", "title": "1. How do we rotate points?", "description": "First let's think about how to rotate some really simple points such as (0,0) and (1,0)\nClick here to review basic trig ratios.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Je4GicbcyLU.mp4/Je4GicbcyLU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Je4GicbcyLU.mp4/Je4GicbcyLU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Je4GicbcyLU.m3u8/Je4GicbcyLU.m3u8"}, "slug": "set-7", "video_id": "Je4GicbcyLU", "youtube_id": "Je4GicbcyLU", "readable_id": "set-7"}, "mxsYHiDVNlk": {"duration": 594, "path": "khan/economics-finance-domain/core-finance/housing/home-equity-tutorial/introduction-to-balance-sheets/", "keywords": "Finance, accounting, equity, mortgage, debt, credit, crunch", "id": "mxsYHiDVNlk", "title": "Introduction to balance sheets", "description": "Using a home purchase to illustrate assets, liabilities and owner's equity.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mxsYHiDVNlk.mp4/mxsYHiDVNlk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mxsYHiDVNlk.mp4/mxsYHiDVNlk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mxsYHiDVNlk.m3u8/mxsYHiDVNlk.m3u8"}, "slug": "introduction-to-balance-sheets", "video_id": "mxsYHiDVNlk", "youtube_id": "mxsYHiDVNlk", "readable_id": "introduction-to-balance-sheets"}, "YFtf-xA7_oM": {"duration": 286, "path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/paul-c-zanne-the-large-bathers-1906/", "keywords": "Paul C\u00e9zanne, Large Bathers, 1906, Philadelphia, Bathers, C\u00e9zanne, Cezanne, Post-Impressionism, French, France, painting, landscape, titian, figure, Modern Art, Google Art Project, Smarthistory, Khan Academy, OER, art history", "id": "YFtf-xA7_oM", "title": "Cezanne, The Large Bathers", "description": "Paul C\u00e9zanne, The Large Bathers, 1906, oil on canvas, 82-7/8 x 98-3/4 inches / 210.5 x 250.8 cm (Philadelphia Museum of Art). In the Google Art Project: http://www.googleartproject.com/collection/philadelphia-museum-of-art/artwork/the-large-bathers-paul-cezanne-french-1839-1906/808050/", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YFtf-xA7_oM.mp4/YFtf-xA7_oM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YFtf-xA7_oM.mp4/YFtf-xA7_oM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YFtf-xA7_oM.m3u8/YFtf-xA7_oM.m3u8"}, "slug": "paul-c-zanne-the-large-bathers-1906", "video_id": "YFtf-xA7_oM", "youtube_id": "YFtf-xA7_oM", "readable_id": "paul-c-zanne-the-large-bathers-1906"}, "obZzOq_wSCg": {"duration": 602, "path": "khan/math/precalculus/prob_comb/addition_rule_prob_precalc/probability-with-playing-cards-and-venn-diagrams/", "keywords": "math, chance, probability", "id": "obZzOq_wSCg", "title": "Probability with playing cards and Venn diagrams", "description": "Probability of compound events. The Addition Rule. Common Core Standard 457 S-CP.7", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/obZzOq_wSCg.mp4/obZzOq_wSCg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/obZzOq_wSCg.mp4/obZzOq_wSCg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/obZzOq_wSCg.m3u8/obZzOq_wSCg.m3u8"}, "slug": "probability-with-playing-cards-and-venn-diagrams", "video_id": "obZzOq_wSCg", "youtube_id": "obZzOq_wSCg", "readable_id": "probability-with-playing-cards-and-venn-diagrams"}, "trRl8QXtdMI": {"duration": 492, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-treatment/", "keywords": "", "id": "trRl8QXtdMI", "title": "Lung cancer treatment", "description": "Lung cancer is treated using a combination of treatments such as chemotherapy, radiation, and a variety of surgical procedures (such as wedge resections, pneumonectomies, and segmental resections). Learn about the complications and side effects of treatment options and why they occur.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/trRl8QXtdMI.mp4/trRl8QXtdMI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/trRl8QXtdMI.mp4/trRl8QXtdMI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/trRl8QXtdMI.m3u8/trRl8QXtdMI.m3u8"}, "slug": "lung-cancer-treatment", "video_id": "trRl8QXtdMI", "youtube_id": "trRl8QXtdMI", "readable_id": "lung-cancer-treatment"}, "mXsn-YYUN4Y": {"duration": 483, "path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/estimating-a-solution-to-nonlinear-system-with-calculator/", "keywords": "", "id": "mXsn-YYUN4Y", "title": "Estimating a solution to nonlinear system with calculator", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mXsn-YYUN4Y.mp4/mXsn-YYUN4Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mXsn-YYUN4Y.mp4/mXsn-YYUN4Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mXsn-YYUN4Y.m3u8/mXsn-YYUN4Y.m3u8"}, "slug": "estimating-a-solution-to-nonlinear-system-with-calculator", "video_id": "mXsn-YYUN4Y", "youtube_id": "mXsn-YYUN4Y", "readable_id": "estimating-a-solution-to-nonlinear-system-with-calculator"}, "wK4QAvtQKiM": {"duration": 304, "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies/sscc-blended-helpteach/", "keywords": "", "id": "wK4QAvtQKiM", "title": "Helping teachers make the change", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wK4QAvtQKiM.mp4/wK4QAvtQKiM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wK4QAvtQKiM.mp4/wK4QAvtQKiM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wK4QAvtQKiM.m3u8/wK4QAvtQKiM.m3u8"}, "slug": "sscc-blended-helpteach", "video_id": "wK4QAvtQKiM", "youtube_id": "wK4QAvtQKiM", "readable_id": "sscc-blended-helpteach"}, "IiTtGENiVOA": {"duration": 360, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/vel-zquez-las-meninas-c-1656/", "keywords": "prado, art history, smarthistory, velazques, meninas, baroque, madrid", "id": "IiTtGENiVOA", "title": "Vel\u00e1zquez, Las Meninas", "description": "Diego Rodr\u00edguez de Silva y Vel\u00e1zquez, Las Meninas, c. 1656, oil on canvas, 125 1/4 x 108 5/8 in. (318 x 276 cm), (Museo Nacional del Prado, Madrid)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IiTtGENiVOA.mp4/IiTtGENiVOA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IiTtGENiVOA.mp4/IiTtGENiVOA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IiTtGENiVOA.m3u8/IiTtGENiVOA.m3u8"}, "slug": "vel-zquez-las-meninas-c-1656", "video_id": "IiTtGENiVOA", "youtube_id": "IiTtGENiVOA", "readable_id": "vel-zquez-las-meninas-c-1656"}, "aBBTiPsYUVA": {"duration": 545, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-polio/poliomyelitis-pathophysiology/", "keywords": "", "id": "aBBTiPsYUVA", "title": "Poliomyelitis pathophysiology", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aBBTiPsYUVA.mp4/aBBTiPsYUVA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aBBTiPsYUVA.mp4/aBBTiPsYUVA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aBBTiPsYUVA.m3u8/aBBTiPsYUVA.m3u8"}, "slug": "poliomyelitis-pathophysiology", "video_id": "aBBTiPsYUVA", "youtube_id": "aBBTiPsYUVA", "readable_id": "poliomyelitis-pathophysiology"}, "jDadorSbhi4": {"duration": 581, "path": "khan/test-prep/mcat/cells/eukaryotic-cells/endoplasmic-reticulum-and-golgi-apparatus/", "keywords": "", "id": "jDadorSbhi4", "title": "Endoplasmic reticulum and golgi apparatus", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jDadorSbhi4.mp4/jDadorSbhi4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jDadorSbhi4.mp4/jDadorSbhi4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jDadorSbhi4.m3u8/jDadorSbhi4.m3u8"}, "slug": "endoplasmic-reticulum-and-golgi-apparatus", "video_id": "jDadorSbhi4", "youtube_id": "jDadorSbhi4", "readable_id": "endoplasmic-reticulum-and-golgi-apparatus"}, "DNAnQBhGpRw": {"duration": 573, "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/sample-standard-deviation-and-bias/", "keywords": "", "id": "DNAnQBhGpRw", "title": "Sample standard deviation and bias", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DNAnQBhGpRw.mp4/DNAnQBhGpRw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DNAnQBhGpRw.mp4/DNAnQBhGpRw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DNAnQBhGpRw.m3u8/DNAnQBhGpRw.m3u8"}, "slug": "sample-standard-deviation-and-bias", "video_id": "DNAnQBhGpRw", "youtube_id": "DNAnQBhGpRw", "readable_id": "sample-standard-deviation-and-bias"}, "efE8xuvUjAo": {"duration": 253, "path": "khan/math/probability/random-variables-topic/binomial_distribution/generalizing-k-scores-in-n-attempts/", "keywords": "", "id": "efE8xuvUjAo", "title": "Generalizing k scores in n attempts", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/efE8xuvUjAo.mp4/efE8xuvUjAo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/efE8xuvUjAo.mp4/efE8xuvUjAo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/efE8xuvUjAo.m3u8/efE8xuvUjAo.m3u8"}, "slug": "generalizing-k-scores-in-n-attempts", "video_id": "efE8xuvUjAo", "youtube_id": "efE8xuvUjAo", "readable_id": "generalizing-k-scores-in-n-attempts"}, "v4MenooI1J0": {"duration": 159, "path": "khan/math/precalculus/precalc-matrices/inverting_matrices/finding-the-determinant-of-a-3x3-matrix-method-1/", "keywords": "", "id": "v4MenooI1J0", "title": "Finding the determinant of a 3x3 matrix method 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v4MenooI1J0.mp4/v4MenooI1J0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v4MenooI1J0.mp4/v4MenooI1J0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v4MenooI1J0.m3u8/v4MenooI1J0.m3u8"}, "slug": "finding-the-determinant-of-a-3x3-matrix-method-1", "video_id": "v4MenooI1J0", "youtube_id": "v4MenooI1J0", "readable_id": "finding-the-determinant-of-a-3x3-matrix-method-1"}, "Be3tuYMgA9I": {"duration": 669, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/tetralogy-of-fallot/", "keywords": "", "id": "Be3tuYMgA9I", "title": "Tetralogy of fallot", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Be3tuYMgA9I.mp4/Be3tuYMgA9I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Be3tuYMgA9I.mp4/Be3tuYMgA9I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Be3tuYMgA9I.m3u8/Be3tuYMgA9I.m3u8"}, "slug": "tetralogy-of-fallot", "video_id": "Be3tuYMgA9I", "youtube_id": "Be3tuYMgA9I", "readable_id": "tetralogy-of-fallot"}, "WomsUEVVtCk": {"duration": 437, "path": "khan/test-prep/mcat/physical-processes/gas-phase/real-gases-and-the-van-der-waals-equation/", "keywords": "", "id": "WomsUEVVtCk", "title": "Real gases and the van der Waals equation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WomsUEVVtCk.mp4/WomsUEVVtCk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WomsUEVVtCk.mp4/WomsUEVVtCk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WomsUEVVtCk.m3u8/WomsUEVVtCk.m3u8"}, "slug": "real-gases-and-the-van-der-waals-equation", "video_id": "WomsUEVVtCk", "youtube_id": "WomsUEVVtCk", "readable_id": "real-gases-and-the-van-der-waals-equation"}, "LbTH7MGMNjk": {"duration": 414, "path": "khan/math/integral-calculus/solid_revolution_topic/area-between-curves/area-between-curves-with-multiple-boundaries/", "keywords": "", "id": "LbTH7MGMNjk", "title": "Area between curves with multiple boundaries", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LbTH7MGMNjk.mp4/LbTH7MGMNjk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LbTH7MGMNjk.mp4/LbTH7MGMNjk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LbTH7MGMNjk.m3u8/LbTH7MGMNjk.m3u8"}, "slug": "area-between-curves-with-multiple-boundaries", "video_id": "LbTH7MGMNjk", "youtube_id": "LbTH7MGMNjk", "readable_id": "area-between-curves-with-multiple-boundaries"}, "eF6zYNzlZKQ": {"duration": 990, "path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-quadratic-expressions/", "keywords": "Factoring, Quadratic, Expressions, CC_39336_A-REI_4_b, CC_39336_A-SSE_3_a, CC_39336_F-IF_8_a", "id": "eF6zYNzlZKQ", "title": "More examples of factoring quadratics with a leading coefficient of 1", "description": "Can't get enough of Sal factoring simple quadratics? Here's a handful of examples just for you!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eF6zYNzlZKQ.mp4/eF6zYNzlZKQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eF6zYNzlZKQ.mp4/eF6zYNzlZKQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eF6zYNzlZKQ.m3u8/eF6zYNzlZKQ.m3u8"}, "slug": "factoring-quadratic-expressions", "video_id": "eF6zYNzlZKQ", "youtube_id": "eF6zYNzlZKQ", "readable_id": "factoring-quadratic-expressions"}, "gBKBKfikLbo": {"duration": 357, "path": "khan/computing/computer-science/informationtheory/info-theory/source-encoding-language-of-coins-4-9/", "keywords": "information theory, source coding, source encoding, probability", "id": "gBKBKfikLbo", "title": "Source encoding", "description": "Introduction to coding theory!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gBKBKfikLbo.mp4/gBKBKfikLbo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gBKBKfikLbo.mp4/gBKBKfikLbo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gBKBKfikLbo.m3u8/gBKBKfikLbo.m3u8"}, "slug": "source-encoding-language-of-coins-4-9", "video_id": "gBKBKfikLbo", "youtube_id": "gBKBKfikLbo", "readable_id": "source-encoding-language-of-coins-4-9"}, "t4xOkpP8FgE": {"duration": 330, "path": "khan/math/arithmetic/absolute-value/abs_value_tutorial/absolute-value-as-distance-between-numbers/", "keywords": "", "id": "t4xOkpP8FgE", "title": "Absolute value as distance between numbers", "description": "In this video, we think about what |a-b| really means, and we verify that |a-b| = |b-a| by looking at an example.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/t4xOkpP8FgE.mp4/t4xOkpP8FgE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/t4xOkpP8FgE.mp4/t4xOkpP8FgE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/t4xOkpP8FgE.m3u8/t4xOkpP8FgE.m3u8"}, "slug": "absolute-value-as-distance-between-numbers", "video_id": "t4xOkpP8FgE", "youtube_id": "t4xOkpP8FgE", "readable_id": "absolute-value-as-distance-between-numbers"}, "SP-YJe7Vldo": {"duration": 284, "path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/complex-number-intro/", "keywords": "", "id": "SP-YJe7Vldo", "title": "Introduction to complex numbers", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SP-YJe7Vldo.mp4/SP-YJe7Vldo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SP-YJe7Vldo.mp4/SP-YJe7Vldo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SP-YJe7Vldo.m3u8/SP-YJe7Vldo.m3u8"}, "slug": "complex-number-intro", "video_id": "SP-YJe7Vldo", "youtube_id": "SP-YJe7Vldo", "readable_id": "complex-number-intro"}, "kXULrUxGzmU": {"duration": 481, "path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/maclaurin-series-based-on-cos-x/", "keywords": "", "id": "kXULrUxGzmU", "title": "Maclaurin series based on cos x", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kXULrUxGzmU.mp4/kXULrUxGzmU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kXULrUxGzmU.mp4/kXULrUxGzmU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kXULrUxGzmU.m3u8/kXULrUxGzmU.m3u8"}, "slug": "maclaurin-series-based-on-cos-x", "video_id": "kXULrUxGzmU", "youtube_id": "kXULrUxGzmU", "readable_id": "maclaurin-series-based-on-cos-x"}, "scgd0gh6BFs": {"duration": 205, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/convergence-macro/", "keywords": "", "id": "scgd0gh6BFs", "title": "Convergence on macro scale", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/scgd0gh6BFs.mp4/scgd0gh6BFs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/scgd0gh6BFs.mp4/scgd0gh6BFs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/scgd0gh6BFs.m3u8/scgd0gh6BFs.m3u8"}, "slug": "convergence-macro", "video_id": "scgd0gh6BFs", "youtube_id": "scgd0gh6BFs", "readable_id": "convergence-macro"}, "7oBUIo5R5qg": {"duration": 388, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/palace-westminster/", "keywords": "Westminster parliament lords commons", "id": "7oBUIo5R5qg", "title": "Charles Barry and A.W.N. Pugin, Palace of Westminster (Houses of Parliament)", "description": "Charles Barry and A.W.N. Pugin, Palace of Westminster (Houses of Parliament), 1840-70, London\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7oBUIo5R5qg.mp4/7oBUIo5R5qg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7oBUIo5R5qg.mp4/7oBUIo5R5qg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7oBUIo5R5qg.m3u8/7oBUIo5R5qg.m3u8"}, "slug": "palace-westminster", "video_id": "7oBUIo5R5qg", "youtube_id": "7oBUIo5R5qg", "readable_id": "palace-westminster"}, "JULBDJx42DY": {"duration": 2724, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/reid-hoffman-founder-of-linkedin/", "keywords": "", "id": "JULBDJx42DY", "title": "Reid Hoffman - Founder of LinkedIn", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JULBDJx42DY.mp4/JULBDJx42DY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JULBDJx42DY.mp4/JULBDJx42DY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JULBDJx42DY.m3u8/JULBDJx42DY.m3u8"}, "slug": "reid-hoffman-founder-of-linkedin", "video_id": "JULBDJx42DY", "youtube_id": "JULBDJx42DY", "readable_id": "reid-hoffman-founder-of-linkedin"}, "Z5myJ8dg_rM": {"duration": 422, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/logarithms/", "keywords": "", "id": "Z5myJ8dg_rM", "title": "Logarithms", "description": "Intro to logarithms. Learning that logarithms are just a way of expressing \"the exponent that you have to raise a base to to get another number\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z5myJ8dg_rM.mp4/Z5myJ8dg_rM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z5myJ8dg_rM.mp4/Z5myJ8dg_rM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z5myJ8dg_rM.m3u8/Z5myJ8dg_rM.m3u8"}, "slug": "logarithms", "video_id": "Z5myJ8dg_rM", "youtube_id": "Z5myJ8dg_rM", "readable_id": "logarithms"}, "-hJj5NpWUXQ": {"duration": 664, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/getting-a-seed-round-from-a-vc/", "keywords": "venture, capital, seed, series", "id": "-hJj5NpWUXQ", "title": "Getting a seed round from a VC", "description": "Series A funding from a seed venture capitalist.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-hJj5NpWUXQ.mp4/-hJj5NpWUXQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-hJj5NpWUXQ.mp4/-hJj5NpWUXQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-hJj5NpWUXQ.m3u8/-hJj5NpWUXQ.m3u8"}, "slug": "getting-a-seed-round-from-a-vc", "video_id": "-hJj5NpWUXQ", "youtube_id": "-hJj5NpWUXQ", "readable_id": "getting-a-seed-round-from-a-vc"}, "tWDflkBZC6U": {"duration": 964, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/parthenon/", "keywords": "Iktinos, Kallikrates, Phidias, Parthenon, Acropolis, Athens", "id": "tWDflkBZC6U", "title": "Parthenon (Acropolis)", "description": "Iktinos and Kallikrates (Phidias directed the sculptural program), Parthenon, Athens, 447 - 432 B.C.E.\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tWDflkBZC6U.mp4/tWDflkBZC6U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tWDflkBZC6U.mp4/tWDflkBZC6U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tWDflkBZC6U.m3u8/tWDflkBZC6U.m3u8"}, "slug": "parthenon", "video_id": "tWDflkBZC6U", "youtube_id": "tWDflkBZC6U", "readable_id": "parthenon"}, "cuShHDFBiE8": {"duration": 151, "path": "khan/college-admissions/applying-to-college/introduction-atc/sal-khans-story-applying-to-college/", "keywords": "", "id": "cuShHDFBiE8", "title": "Sal Khan's story: Applying to college", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cuShHDFBiE8.mp4/cuShHDFBiE8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cuShHDFBiE8.mp4/cuShHDFBiE8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cuShHDFBiE8.m3u8/cuShHDFBiE8.m3u8"}, "slug": "sal-khans-story-applying-to-college", "video_id": "cuShHDFBiE8", "youtube_id": "cuShHDFBiE8", "readable_id": "sal-khans-story-applying-to-college"}, "Gedy8LwQTaw": {"duration": 250, "path": "khan/humanities/history/euro-hist/american-entry-world-war-i/zimmermann-telegram/", "keywords": "", "id": "Gedy8LwQTaw", "title": "Zimmermann Telegram", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Gedy8LwQTaw.mp4/Gedy8LwQTaw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Gedy8LwQTaw.mp4/Gedy8LwQTaw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Gedy8LwQTaw.m3u8/Gedy8LwQTaw.m3u8"}, "slug": "zimmermann-telegram", "video_id": "Gedy8LwQTaw", "youtube_id": "Gedy8LwQTaw", "readable_id": "zimmermann-telegram"}, "QH1g-pVS0ZY": {"duration": 813, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/inflammatory-bowel-disease-rn/inflammatory-bowel-disease-diagnosis/", "keywords": "Disease (Cause Of Death),Inflammatory Bowel Disease (Disease Or Medical Condition),Health (Industry),Diagnosis (Literature Subject),Inflammation (Symptom)", "id": "QH1g-pVS0ZY", "title": "Inflammatory bowel disease: Diagnosis", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QH1g-pVS0ZY.mp4/QH1g-pVS0ZY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QH1g-pVS0ZY.mp4/QH1g-pVS0ZY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QH1g-pVS0ZY.m3u8/QH1g-pVS0ZY.m3u8"}, "slug": "inflammatory-bowel-disease-diagnosis", "video_id": "QH1g-pVS0ZY", "youtube_id": "QH1g-pVS0ZY", "readable_id": "inflammatory-bowel-disease-diagnosis"}, "T9byZBGtGuw": {"duration": 848, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-18-big-picture-discussion/", "keywords": "gold, money, banking, fractional, reserve", "id": "T9byZBGtGuw", "title": "Banking 18: Big picture discussion", "description": "Pros and Cons of various banking systems. More on gold.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T9byZBGtGuw.mp4/T9byZBGtGuw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T9byZBGtGuw.mp4/T9byZBGtGuw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T9byZBGtGuw.m3u8/T9byZBGtGuw.m3u8"}, "slug": "banking-18-big-picture-discussion", "video_id": "T9byZBGtGuw", "youtube_id": "T9byZBGtGuw", "readable_id": "banking-18-big-picture-discussion"}, "uwDHi2KNM4s": {"duration": 340, "path": "khan/humanities/ancient-art-civilizations/greek-art/classical/egyptian-blue-parthenon/", "keywords": "Parthenon, Greece, ", "id": "uwDHi2KNM4s", "title": "Egyptian blue on the Parthenon sculptures", "description": "A new technique unveils ancient colour at the British Museum. \u00a9 Trustees of the British Museum.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uwDHi2KNM4s.mp4/uwDHi2KNM4s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uwDHi2KNM4s.mp4/uwDHi2KNM4s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uwDHi2KNM4s.m3u8/uwDHi2KNM4s.m3u8"}, "slug": "egyptian-blue-parthenon", "video_id": "uwDHi2KNM4s", "youtube_id": "uwDHi2KNM4s", "readable_id": "egyptian-blue-parthenon"}, "qZTeyhR1akA": {"duration": 428, "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-preparation-alkynes/alkyne-nomenclature/", "keywords": "", "id": "qZTeyhR1akA", "title": "Alkyne nomenclature", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qZTeyhR1akA.mp4/qZTeyhR1akA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qZTeyhR1akA.mp4/qZTeyhR1akA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qZTeyhR1akA.m3u8/qZTeyhR1akA.m3u8"}, "slug": "alkyne-nomenclature", "video_id": "qZTeyhR1akA", "youtube_id": "qZTeyhR1akA", "readable_id": "alkyne-nomenclature"}, "VdQ6lAhKGTc": {"duration": 714, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm/aneurysm-treatment/", "keywords": "", "id": "VdQ6lAhKGTc", "title": "Aneurysm treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VdQ6lAhKGTc.mp4/VdQ6lAhKGTc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VdQ6lAhKGTc.mp4/VdQ6lAhKGTc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VdQ6lAhKGTc.m3u8/VdQ6lAhKGTc.m3u8"}, "slug": "aneurysm-treatment", "video_id": "VdQ6lAhKGTc", "youtube_id": "VdQ6lAhKGTc", "readable_id": "aneurysm-treatment"}, "mykrnTh1tz8": {"duration": 779, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/inhaling-and-exhaling/", "keywords": "", "id": "mykrnTh1tz8", "title": "Inhaling and exhaling", "description": "Find out exactly why air goes in and out of the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mykrnTh1tz8.mp4/mykrnTh1tz8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mykrnTh1tz8.mp4/mykrnTh1tz8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mykrnTh1tz8.m3u8/mykrnTh1tz8.m3u8"}, "slug": "inhaling-and-exhaling", "video_id": "mykrnTh1tz8", "youtube_id": "mykrnTh1tz8", "readable_id": "inhaling-and-exhaling"}, "FXgV9ySNusc": {"duration": 729, "path": "khan/math/algebra2/arithmetic-with-polynomials/long-division-of-polynomials/polynomial-division/", "keywords": "Polynomial, Division, CC_39336_A-APR_2", "id": "FXgV9ySNusc", "title": "Introduction to long division of polynomials", "description": "Sal explains what polynomial long division is, and gives various examples of polynomial long divisions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FXgV9ySNusc.mp4/FXgV9ySNusc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FXgV9ySNusc.mp4/FXgV9ySNusc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FXgV9ySNusc.m3u8/FXgV9ySNusc.m3u8"}, "slug": "polynomial-division", "video_id": "FXgV9ySNusc", "youtube_id": "FXgV9ySNusc", "readable_id": "polynomial-division"}, "fSu1LKnhM5Q": {"duration": 666, "path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/two-column-proof-showing-segments-are-perpendicular/", "keywords": "SSS, SAS, ASA, AAS", "id": "fSu1LKnhM5Q", "title": "Proof: The diagonals of a kite are perpendicular", "description": "Sal proves that the diagonals of a kite are perpendicular, by using the SSS and SAS triangle congruence criteria.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fSu1LKnhM5Q.mp4/fSu1LKnhM5Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fSu1LKnhM5Q.mp4/fSu1LKnhM5Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fSu1LKnhM5Q.m3u8/fSu1LKnhM5Q.m3u8"}, "slug": "two-column-proof-showing-segments-are-perpendicular", "video_id": "fSu1LKnhM5Q", "youtube_id": "fSu1LKnhM5Q", "readable_id": "two-column-proof-showing-segments-are-perpendicular"}, "CfJzrmS9UfY": {"duration": 238, "path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-stars/", "keywords": "math, doodles, mathematics, doodling, school, stars, factoring, factors", "id": "CfJzrmS9UfY", "title": "Doodling in math: Stars", "description": "More videos/info: http://vihart.com/doodlingCheck out this cool star-making applet Ruurtjan sent me: http://stars.ruurtjan.comDoodling Infinity Elephants: http://www.youtube.com/watch?v=DK5Z709J2eoDoodling Snakes + Graphs: http://www.youtube.com/watch?v=heKK95DAKmsDoodling Binary Trees: http://www.youtube.com/watch?v=e4MSN6IImpIhttp://vihart.com", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CfJzrmS9UfY.mp4/CfJzrmS9UfY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CfJzrmS9UfY.mp4/CfJzrmS9UfY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CfJzrmS9UfY.m3u8/CfJzrmS9UfY.m3u8"}, "slug": "doodling-in-math-class-stars", "video_id": "CfJzrmS9UfY", "youtube_id": "CfJzrmS9UfY", "readable_id": "doodling-in-math-class-stars"}, "It3i-dKusIM": {"duration": 598, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/justinian-and-his-attendants-6th-century-ravenna/", "keywords": "Justinian, San Vitale, byzantine, art, art history, smarthistory, ravenna", "id": "It3i-dKusIM", "title": "San Vitale, Ravenna", "description": "San Vitale is one of the most important surviving examples of Byzantine architecture and mosaic work. It was begun in 526 or 527 under Ostrogothic rule. It was consecrated in 547 and completed soon after. Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/It3i-dKusIM.mp4/It3i-dKusIM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/It3i-dKusIM.mp4/It3i-dKusIM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/It3i-dKusIM.m3u8/It3i-dKusIM.m3u8"}, "slug": "justinian-and-his-attendants-6th-century-ravenna", "video_id": "It3i-dKusIM", "youtube_id": "It3i-dKusIM", "readable_id": "justinian-and-his-attendants-6th-century-ravenna"}, "wNB9Vm6MoDQ": {"duration": 403, "path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/georges-seurat-a-sunday-on-la-grande-jatte-1884-1884-86/", "keywords": "Paris, Impressionism, Post-Impressionism, Leisure, Georges Seurat, Seurat, Sunday, Grande Jatte, 1884, 1886, Art Institute of Chicago, divisionism, Neo-Impressionism, pointillism, Khan Academy, smarthistory, art history, Google Art Project, OER, painting", "id": "wNB9Vm6MoDQ", "title": "Seurat, A Sunday on La Grande Jatte", "description": "Georges Seurat, A Sunday on La Grande Jatte - 1884, 1884-86, oil on canvas, 81-3/4 x 121-1/4 inches / 207.5 x 308.1 cm (The Art Institute of Chicago). In the Google Art project: http://www.googleartproject.com/collection/the-art-institute-of-chicago/artwork/a-sunday-on-la-grande-jatte-1884-georges-seurat/609033/", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wNB9Vm6MoDQ.mp4/wNB9Vm6MoDQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wNB9Vm6MoDQ.mp4/wNB9Vm6MoDQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wNB9Vm6MoDQ.m3u8/wNB9Vm6MoDQ.m3u8"}, "slug": "georges-seurat-a-sunday-on-la-grande-jatte-1884-1884-86", "video_id": "wNB9Vm6MoDQ", "youtube_id": "wNB9Vm6MoDQ", "readable_id": "georges-seurat-a-sunday-on-la-grande-jatte-1884-1884-86"}, "uXdIdIjllEI": {"duration": 503, "path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/self-control/", "keywords": "", "id": "uXdIdIjllEI", "title": "Self control", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uXdIdIjllEI.mp4/uXdIdIjllEI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uXdIdIjllEI.mp4/uXdIdIjllEI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uXdIdIjllEI.m3u8/uXdIdIjllEI.m3u8"}, "slug": "self-control", "video_id": "uXdIdIjllEI", "youtube_id": "uXdIdIjllEI", "readable_id": "self-control"}, "LtlodYLm8fc": {"duration": 619, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-anemia/rn-anemia-pathophysiology/", "keywords": "", "id": "LtlodYLm8fc", "title": "Anemia pathophysiology", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LtlodYLm8fc.mp4/LtlodYLm8fc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LtlodYLm8fc.mp4/LtlodYLm8fc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LtlodYLm8fc.m3u8/LtlodYLm8fc.m3u8"}, "slug": "rn-anemia-pathophysiology", "video_id": "LtlodYLm8fc", "youtube_id": "LtlodYLm8fc", "readable_id": "rn-anemia-pathophysiology"}, "C3HFAyigqoY": {"duration": 242, "path": "khan/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity/tan-periodicity/", "keywords": "", "id": "C3HFAyigqoY", "title": "Periodicity of tan example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C3HFAyigqoY.mp4/C3HFAyigqoY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C3HFAyigqoY.mp4/C3HFAyigqoY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C3HFAyigqoY.m3u8/C3HFAyigqoY.m3u8"}, "slug": "tan-periodicity", "video_id": "C3HFAyigqoY", "youtube_id": "C3HFAyigqoY", "readable_id": "tan-periodicity"}, "Z29bpAW1AUM": {"duration": 250, "path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/pietro-lorenzetti-birth-of-the-virgin-c-1342/", "keywords": "Pietro Lorenzetti, Lorenzetti, Birth of the Virgin, 1342, tempera on panel, St. Savinus, Siena Cathedral, Museo dell'Opera del Duomo, Siena", "id": "Z29bpAW1AUM", "title": "Pietro Lorenzetti, Birth of the Virgin", "description": "Pietro Lorenzetti, Birth of the Virgin, c. 1342, tempera on panel, 6 feet, 1 inch x 5 feet, 11 inches, for the altar of St. Savinus, Siena Cathedral (now in Museo dell'Opera del Duomo, Siena) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z29bpAW1AUM.mp4/Z29bpAW1AUM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z29bpAW1AUM.mp4/Z29bpAW1AUM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z29bpAW1AUM.m3u8/Z29bpAW1AUM.m3u8"}, "slug": "pietro-lorenzetti-birth-of-the-virgin-c-1342", "video_id": "Z29bpAW1AUM", "youtube_id": "Z29bpAW1AUM", "readable_id": "pietro-lorenzetti-birth-of-the-virgin-c-1342"}, "BBIGR0RAMtY": {"duration": 662, "path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-roundup/", "keywords": "chemistry, titration, equivalence", "id": "BBIGR0RAMtY", "title": "Titration roundup", "description": "Making sure you fully understand titration curves by comparing the initial pH and pH at equivalence point for different types.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BBIGR0RAMtY.mp4/BBIGR0RAMtY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BBIGR0RAMtY.mp4/BBIGR0RAMtY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BBIGR0RAMtY.m3u8/BBIGR0RAMtY.m3u8"}, "slug": "titration-roundup", "video_id": "BBIGR0RAMtY", "youtube_id": "BBIGR0RAMtY", "readable_id": "titration-roundup"}, "PLPNQMPDoNo": {"duration": 75, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-6-1/", "keywords": "", "id": "PLPNQMPDoNo", "title": "1 Missing angle", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PLPNQMPDoNo.mp4/PLPNQMPDoNo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PLPNQMPDoNo.mp4/PLPNQMPDoNo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PLPNQMPDoNo.m3u8/PLPNQMPDoNo.m3u8"}, "slug": "sat-2010-may-6-1", "video_id": "PLPNQMPDoNo", "youtube_id": "PLPNQMPDoNo", "readable_id": "sat-2010-may-6-1"}, "-MQ5dL9cQX0": {"duration": 164, "path": "khan/humanities/ancient-art-civilizations/egypt-art/ptolemaic/the-mummification-process/", "keywords": "", "id": "-MQ5dL9cQX0", "title": "The mummification process", "description": "Ancient Egyptian mummification preserved the body for the afterlife by removing internal organs and moisture and by wrapping the body with linen. This animation uses the Getty's mummy Herakleides. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-MQ5dL9cQX0.mp4/-MQ5dL9cQX0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-MQ5dL9cQX0.mp4/-MQ5dL9cQX0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-MQ5dL9cQX0.m3u8/-MQ5dL9cQX0.m3u8"}, "slug": "the-mummification-process", "video_id": "-MQ5dL9cQX0", "youtube_id": "-MQ5dL9cQX0", "readable_id": "the-mummification-process"}, "Df2escG-Vu0": {"duration": 293, "path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/alternate-form-of-the-derivative/", "keywords": "", "id": "Df2escG-Vu0", "title": "Formal and alternate form of the derivative", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Df2escG-Vu0.mp4/Df2escG-Vu0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Df2escG-Vu0.mp4/Df2escG-Vu0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Df2escG-Vu0.m3u8/Df2escG-Vu0.m3u8"}, "slug": "alternate-form-of-the-derivative", "video_id": "Df2escG-Vu0", "youtube_id": "Df2escG-Vu0", "readable_id": "alternate-form-of-the-derivative"}, "T0CwhLHrE2k": {"duration": 225, "path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/amt-overview/", "keywords": "IRS, taxes", "id": "T0CwhLHrE2k", "title": "AMT overview", "description": "Overview of what the Alternative Minimum Tax is and its purpose", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T0CwhLHrE2k.mp4/T0CwhLHrE2k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T0CwhLHrE2k.mp4/T0CwhLHrE2k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T0CwhLHrE2k.m3u8/T0CwhLHrE2k.m3u8"}, "slug": "amt-overview", "video_id": "T0CwhLHrE2k", "youtube_id": "T0CwhLHrE2k", "readable_id": "amt-overview"}, "g4XZGhnFOwM": {"duration": 302, "path": "khan/humanities/renaissance-reformation/northern/cranach-altdorfer/cranach-the-elder-adam-and-eve-1526/", "keywords": "Cranach, Adam and Eve, Art History, Smarthistory", "id": "g4XZGhnFOwM", "title": "Cranach, Adam and Eve", "description": "Lucus Cranach the Elder, Adam and Eve, 1526, oil on panel\u00a0(Courtauld Gallery, London).\u00a0\n\nSpeakers: Rachel Ropeik and Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g4XZGhnFOwM.mp4/g4XZGhnFOwM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g4XZGhnFOwM.mp4/g4XZGhnFOwM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g4XZGhnFOwM.m3u8/g4XZGhnFOwM.m3u8"}, "slug": "cranach-the-elder-adam-and-eve-1526", "video_id": "g4XZGhnFOwM", "youtube_id": "g4XZGhnFOwM", "readable_id": "cranach-the-elder-adam-and-eve-1526"}, "xxF_mdoZom0": {"duration": 576, "path": "khan/test-prep/mcat/physical-processes/thin-lenses/convex-lens-examples/", "keywords": "Convex, Lens, Examples", "id": "xxF_mdoZom0", "title": "Convex lens examples", "description": "Convex Lens Examples", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xxF_mdoZom0.mp4/xxF_mdoZom0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xxF_mdoZom0.mp4/xxF_mdoZom0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xxF_mdoZom0.m3u8/xxF_mdoZom0.m3u8"}, "slug": "convex-lens-examples", "video_id": "xxF_mdoZom0", "youtube_id": "xxF_mdoZom0", "readable_id": "convex-lens-examples"}, "x-N76NrMDNE": {"duration": 246, "path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/binomial-theorem-intuition/", "keywords": "", "id": "x-N76NrMDNE", "title": "Connecting Pascal's triangle to binomial combinatorics", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x-N76NrMDNE.mp4/x-N76NrMDNE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x-N76NrMDNE.mp4/x-N76NrMDNE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x-N76NrMDNE.m3u8/x-N76NrMDNE.m3u8"}, "slug": "binomial-theorem-intuition", "video_id": "x-N76NrMDNE", "youtube_id": "x-N76NrMDNE", "readable_id": "binomial-theorem-intuition"}, "w3NwqsQuWZE": {"duration": 202, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q5-easier/", "keywords": "", "id": "w3NwqsQuWZE", "title": "Key features of graphs \u2014 Basic example", "description": "Watch Sal work through a basic Key features of graphs problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w3NwqsQuWZE.mp4/w3NwqsQuWZE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w3NwqsQuWZE.mp4/w3NwqsQuWZE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w3NwqsQuWZE.m3u8/w3NwqsQuWZE.m3u8"}, "slug": "sat-math-q5-easier", "video_id": "w3NwqsQuWZE", "youtube_id": "w3NwqsQuWZE", "readable_id": "sat-math-q5-easier"}, "dw41PMWek6U": {"duration": 205, "path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/using-a-protractor/", "keywords": "Using, a, Protractor", "id": "dw41PMWek6U", "title": "Measuring angles using a protractor", "description": "Let's use our virtual protractor to measure some angles together, shall we?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dw41PMWek6U.mp4/dw41PMWek6U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dw41PMWek6U.mp4/dw41PMWek6U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dw41PMWek6U.m3u8/dw41PMWek6U.m3u8"}, "slug": "using-a-protractor", "video_id": "dw41PMWek6U", "youtube_id": "dw41PMWek6U", "readable_id": "using-a-protractor"}, "TsXlTWgyItw": {"duration": 562, "path": "khan/science/chemistry/chemical-equilibrium/equilibrium-constant/heterogenous-equilibrium/", "keywords": "chemistry", "id": "TsXlTWgyItw", "title": "Heterogeneous equilibrium", "description": "Ignoring the solvent or the solid state molecules when calculating the equilibrium constant.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TsXlTWgyItw.mp4/TsXlTWgyItw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TsXlTWgyItw.mp4/TsXlTWgyItw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TsXlTWgyItw.m3u8/TsXlTWgyItw.m3u8"}, "slug": "heterogenous-equilibrium", "video_id": "TsXlTWgyItw", "youtube_id": "TsXlTWgyItw", "readable_id": "heterogenous-equilibrium"}, "dU_rYyPGYiE": {"duration": 327, "path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/schizophrenia-symptoms/", "keywords": "Symptom,Schizophrenia (Disease Or Medical Condition),Health (Industry)", "id": "dU_rYyPGYiE", "title": "Schizophrenia symptoms", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dU_rYyPGYiE.mp4/dU_rYyPGYiE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dU_rYyPGYiE.mp4/dU_rYyPGYiE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dU_rYyPGYiE.m3u8/dU_rYyPGYiE.m3u8"}, "slug": "schizophrenia-symptoms", "video_id": "dU_rYyPGYiE", "youtube_id": "dU_rYyPGYiE", "readable_id": "schizophrenia-symptoms"}, "A11AfJ2-3rE": {"duration": 519, "path": "khan/math/multivariable-calculus/divergence_theorem_topic/region_types_3d/type-i-regions-in-three-dimensions/", "keywords": "", "id": "A11AfJ2-3rE", "title": "Type I regions in three dimensions", "description": "Definition of Type 1 regions. Visualizing what is and isn't a Type I region", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A11AfJ2-3rE.mp4/A11AfJ2-3rE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A11AfJ2-3rE.mp4/A11AfJ2-3rE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A11AfJ2-3rE.m3u8/A11AfJ2-3rE.m3u8"}, "slug": "type-i-regions-in-three-dimensions", "video_id": "A11AfJ2-3rE", "youtube_id": "A11AfJ2-3rE", "readable_id": "type-i-regions-in-three-dimensions"}, "nB2ZRHS2RUE": {"duration": 278, "path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/attribution-theory-basic-covariation/", "keywords": "", "id": "nB2ZRHS2RUE", "title": "Attribution Theory - Basic covariation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nB2ZRHS2RUE.mp4/nB2ZRHS2RUE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nB2ZRHS2RUE.mp4/nB2ZRHS2RUE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nB2ZRHS2RUE.m3u8/nB2ZRHS2RUE.m3u8"}, "slug": "attribution-theory-basic-covariation", "video_id": "nB2ZRHS2RUE", "youtube_id": "nB2ZRHS2RUE", "readable_id": "attribution-theory-basic-covariation"}, "NYtPw0WiUCo": {"duration": 657, "path": "khan/science/chemistry/periodic-table/copy-of-periodic-table-of-elements/valence-electrons-lewis/", "keywords": "", "id": "NYtPw0WiUCo", "title": "Valence electrons and bonding", "description": "How to get Lewis structures from electron configuration, and how valence electrons are involved in forming bonds.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NYtPw0WiUCo.mp4/NYtPw0WiUCo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NYtPw0WiUCo.mp4/NYtPw0WiUCo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NYtPw0WiUCo.m3u8/NYtPw0WiUCo.m3u8"}, "slug": "valence-electrons-lewis", "video_id": "NYtPw0WiUCo", "youtube_id": "NYtPw0WiUCo", "readable_id": "valence-electrons-lewis"}, "39N5IKGfRmQ": {"duration": 440, "path": "khan/test-prep/mcat/processing-the-environment/stress/stress-management/", "keywords": "MCAT", "id": "39N5IKGfRmQ", "title": "Stress management", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/39N5IKGfRmQ.mp4/39N5IKGfRmQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/39N5IKGfRmQ.mp4/39N5IKGfRmQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/39N5IKGfRmQ.m3u8/39N5IKGfRmQ.m3u8"}, "slug": "stress-management", "video_id": "39N5IKGfRmQ", "youtube_id": "39N5IKGfRmQ", "readable_id": "stress-management"}, "OjF765iVuF8": {"duration": 210, "path": "khan/math/precalculus/precalc-matrices/properties-matrix-multiplication/matrix-expressions/", "keywords": "", "id": "OjF765iVuF8", "title": "Equivalent matrix expressions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OjF765iVuF8.mp4/OjF765iVuF8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OjF765iVuF8.mp4/OjF765iVuF8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OjF765iVuF8.m3u8/OjF765iVuF8.m3u8"}, "slug": "matrix-expressions", "video_id": "OjF765iVuF8", "youtube_id": "OjF765iVuF8", "readable_id": "matrix-expressions"}, "iU58AIjh3YA": {"duration": 783, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/development-of-agriculture-and-writing/", "keywords": "Cuneiform, sumer, sumeria", "id": "iU58AIjh3YA", "title": "Development of agriculture and writing", "description": "The Paleolithic and Neolithic eras of the Stone Age.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iU58AIjh3YA.mp4/iU58AIjh3YA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iU58AIjh3YA.mp4/iU58AIjh3YA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iU58AIjh3YA.m3u8/iU58AIjh3YA.m3u8"}, "slug": "development-of-agriculture-and-writing", "video_id": "iU58AIjh3YA", "youtube_id": "iU58AIjh3YA", "readable_id": "development-of-agriculture-and-writing"}, "M6lFqkqvUgo": {"duration": 1620, "path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/lin-alg-representing-vectors-in-rn-using-subspace-members/", "keywords": "linear, algebra, orthogonal, complement", "id": "M6lFqkqvUgo", "title": "Representing vectors in rn using subspace members", "description": "Showing that any member of Rn can be represented as a unique sum of a vector in subspace V and a vector in the orthogonal complement of V.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M6lFqkqvUgo.mp4/M6lFqkqvUgo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M6lFqkqvUgo.mp4/M6lFqkqvUgo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M6lFqkqvUgo.m3u8/M6lFqkqvUgo.m3u8"}, "slug": "lin-alg-representing-vectors-in-rn-using-subspace-members", "video_id": "M6lFqkqvUgo", "youtube_id": "M6lFqkqvUgo", "readable_id": "lin-alg-representing-vectors-in-rn-using-subspace-members"}, "ngOC4eUQl8Y": {"duration": 815, "path": "khan/test-prep/mcat/physical-processes/capacitors/capacitance/", "keywords": "capacitance, capacitor, farad", "id": "ngOC4eUQl8Y", "title": "Capacitance", "description": "Introduction to the capacitance of a two place capacitor.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ngOC4eUQl8Y.mp4/ngOC4eUQl8Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ngOC4eUQl8Y.mp4/ngOC4eUQl8Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ngOC4eUQl8Y.m3u8/ngOC4eUQl8Y.m3u8"}, "slug": "capacitance", "video_id": "ngOC4eUQl8Y", "youtube_id": "ngOC4eUQl8Y", "readable_id": "capacitance"}, "VIHldsSmASU": {"duration": 300, "path": "khan/economics-finance-domain/core-finance/derivative-securities/black-scholes/implied-volatility/", "keywords": "", "id": "VIHldsSmASU", "title": "Implied volatility", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VIHldsSmASU.mp4/VIHldsSmASU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VIHldsSmASU.mp4/VIHldsSmASU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VIHldsSmASU.m3u8/VIHldsSmASU.m3u8"}, "slug": "implied-volatility", "video_id": "VIHldsSmASU", "youtube_id": "VIHldsSmASU", "readable_id": "implied-volatility"}, "d7zqiCrfiUE": {"duration": 139, "path": "khan/college-admissions/paying-for-college/grants-and-scholarships/searching-for-scholarships/", "keywords": "", "id": "d7zqiCrfiUE", "title": "Searching for scholarships", "description": "College Board Scholarship Search | Fastweb | Scholarships.com", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d7zqiCrfiUE.mp4/d7zqiCrfiUE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d7zqiCrfiUE.mp4/d7zqiCrfiUE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d7zqiCrfiUE.m3u8/d7zqiCrfiUE.m3u8"}, "slug": "searching-for-scholarships", "video_id": "d7zqiCrfiUE", "youtube_id": "d7zqiCrfiUE", "readable_id": "searching-for-scholarships"}, "C3cwGCezgSQ": {"duration": 223, "path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/laoco-n-and-his-sons-early-first-century-c-e/", "keywords": "Greek, Hellenistic, Athanadoros, Hagesandros, Polydoros of Rhodes, Laoco\u00f6n and his Sons", "id": "C3cwGCezgSQ", "title": "Laoco\u00f6n and his sons", "description": "Athanadoros, Hagesandros, and Polydoros of Rhodes, Laoco\u00f6n and his Sons, early first century C.E., marble, 7'10 1/2\" high (Vatican Museums)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C3cwGCezgSQ.mp4/C3cwGCezgSQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C3cwGCezgSQ.mp4/C3cwGCezgSQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C3cwGCezgSQ.m3u8/C3cwGCezgSQ.m3u8"}, "slug": "laoco-n-and-his-sons-early-first-century-c-e", "video_id": "C3cwGCezgSQ", "youtube_id": "C3cwGCezgSQ", "readable_id": "laoco-n-and-his-sons-early-first-century-c-e"}, "4tctB1wZNiI": {"duration": 661, "path": "khan/science/physics/electricity-magnetism/magnetic-field-current-carrying-wire/magnetism-8/", "keywords": "physics, current, magnetic, field", "id": "4tctB1wZNiI", "title": "Magnetic force between two currents going in opposite directions", "description": "Sal shows how to determine the magnetic force between two currents going in opposite directions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4tctB1wZNiI.mp4/4tctB1wZNiI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4tctB1wZNiI.mp4/4tctB1wZNiI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4tctB1wZNiI.m3u8/4tctB1wZNiI.m3u8"}, "slug": "magnetism-8", "video_id": "4tctB1wZNiI", "youtube_id": "4tctB1wZNiI", "readable_id": "magnetism-8"}, "t96N4zaP-s8": {"duration": 152, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/term-of-recursive-sequence/", "keywords": "", "id": "t96N4zaP-s8", "title": "Finding the 5th term in recursively defined sequence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/t96N4zaP-s8.mp4/t96N4zaP-s8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/t96N4zaP-s8.mp4/t96N4zaP-s8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/t96N4zaP-s8.m3u8/t96N4zaP-s8.m3u8"}, "slug": "term-of-recursive-sequence", "video_id": "t96N4zaP-s8", "youtube_id": "t96N4zaP-s8", "readable_id": "term-of-recursive-sequence"}, "NjJFJ7ge_qk": {"duration": 171, "path": "khan/math/arithmetic/telling-time-topic/telling-time/telling-time-exercise-example-1/", "keywords": "", "id": "NjJFJ7ge_qk", "title": "Telling time exercise example 1", "description": "Tell time on a labeled analog clock.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NjJFJ7ge_qk.mp4/NjJFJ7ge_qk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NjJFJ7ge_qk.mp4/NjJFJ7ge_qk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NjJFJ7ge_qk.m3u8/NjJFJ7ge_qk.m3u8"}, "slug": "telling-time-exercise-example-1", "video_id": "NjJFJ7ge_qk", "youtube_id": "NjJFJ7ge_qk", "readable_id": "telling-time-exercise-example-1"}, "79lagkER9qY": {"duration": 769, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-compass-construction/", "keywords": "geometry, compass, construction", "id": "79lagkER9qY", "title": "CA Geometry: Compass construction", "description": "56-60, compass construction, coordinates", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/79lagkER9qY.mp4/79lagkER9qY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/79lagkER9qY.mp4/79lagkER9qY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/79lagkER9qY.m3u8/79lagkER9qY.m3u8"}, "slug": "ca-geometry-compass-construction", "video_id": "79lagkER9qY", "youtube_id": "79lagkER9qY", "readable_id": "ca-geometry-compass-construction"}, "YTRctTr7MyA": {"duration": 75, "path": "khan/humanities/ancient-art-civilizations/greek-art/beginners-guide-greece/prize-amphora/", "keywords": "olympics, ancient greece,", "id": "YTRctTr7MyA", "title": "Prize amphora showing a chariot race", "description": "Chariot-racing was the only Olympic sport in which women could take part, as owners of teams of horses. Kyniska, a princess of Sparta, was the first woman to win the Olympic crown in this sport.\nBritish Museum curator Judith Swaddling describes the amphora.\n\u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YTRctTr7MyA.mp4/YTRctTr7MyA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YTRctTr7MyA.mp4/YTRctTr7MyA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YTRctTr7MyA.m3u8/YTRctTr7MyA.m3u8"}, "slug": "prize-amphora", "video_id": "YTRctTr7MyA", "youtube_id": "YTRctTr7MyA", "readable_id": "prize-amphora"}, "_Ub-jKHFEQg": {"duration": 385, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/e-flat-clarinet-interview-and-demonstration-with-jessica-phillips-rieske/", "keywords": "", "id": "_Ub-jKHFEQg", "title": "E-Flat Clarinet: Interview and demonstration with Jessica Phillips Rieske", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_Ub-jKHFEQg.mp4/_Ub-jKHFEQg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_Ub-jKHFEQg.mp4/_Ub-jKHFEQg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_Ub-jKHFEQg.m3u8/_Ub-jKHFEQg.m3u8"}, "slug": "e-flat-clarinet-interview-and-demonstration-with-jessica-phillips-rieske", "video_id": "_Ub-jKHFEQg", "youtube_id": "_Ub-jKHFEQg", "readable_id": "e-flat-clarinet-interview-and-demonstration-with-jessica-phillips-rieske"}, "Xcrco59p40o": {"duration": 714, "path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/pv-diagrams-part-1-work-and-isobaric-processes/", "keywords": "", "id": "Xcrco59p40o", "title": "PV diagrams - part 1: Work and isobaric processes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Xcrco59p40o.mp4/Xcrco59p40o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Xcrco59p40o.mp4/Xcrco59p40o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Xcrco59p40o.m3u8/Xcrco59p40o.m3u8"}, "slug": "pv-diagrams-part-1-work-and-isobaric-processes", "video_id": "Xcrco59p40o", "youtube_id": "Xcrco59p40o", "readable_id": "pv-diagrams-part-1-work-and-isobaric-processes"}, "K_OI9LA54AA": {"duration": 389, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/point-slope/idea-behind-point-slope-form/", "keywords": "", "id": "K_OI9LA54AA", "title": "Introduction to point-slope form", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K_OI9LA54AA.mp4/K_OI9LA54AA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K_OI9LA54AA.mp4/K_OI9LA54AA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K_OI9LA54AA.m3u8/K_OI9LA54AA.m3u8"}, "slug": "idea-behind-point-slope-form", "video_id": "K_OI9LA54AA", "youtube_id": "K_OI9LA54AA", "readable_id": "idea-behind-point-slope-form"}, "aKeDUvpfOfI": {"duration": 624, "path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/sulfonation-benzene/", "keywords": "", "id": "aKeDUvpfOfI", "title": "Sulfonation", "description": "Sulfonation of benzene", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aKeDUvpfOfI.mp4/aKeDUvpfOfI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aKeDUvpfOfI.mp4/aKeDUvpfOfI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aKeDUvpfOfI.m3u8/aKeDUvpfOfI.m3u8"}, "slug": "sulfonation-benzene", "video_id": "aKeDUvpfOfI", "youtube_id": "aKeDUvpfOfI", "readable_id": "sulfonation-benzene"}, "7rIFO8hct9g": {"duration": 732, "path": "khan/test-prep/iit-jee-subject/iit-jee/point-distance-to-plane/", "keywords": "linear, algebra, point, plane, distance, normal, vector", "id": "7rIFO8hct9g", "title": "Point distance to plane", "description": "Distance between a point and a plane in three dimensions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7rIFO8hct9g.mp4/7rIFO8hct9g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7rIFO8hct9g.mp4/7rIFO8hct9g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7rIFO8hct9g.m3u8/7rIFO8hct9g.m3u8"}, "slug": "point-distance-to-plane", "video_id": "7rIFO8hct9g", "youtube_id": "7rIFO8hct9g", "readable_id": "point-distance-to-plane"}, "kCM2mSb4qIU": {"duration": 334, "path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/periodic-table-transition-metals/", "keywords": "", "id": "kCM2mSb4qIU", "title": "The periodic table - transition metals", "description": "The definition of a transition metal, and how to write the electron configuration including examples for Fe and Zn.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kCM2mSb4qIU.mp4/kCM2mSb4qIU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kCM2mSb4qIU.mp4/kCM2mSb4qIU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kCM2mSb4qIU.m3u8/kCM2mSb4qIU.m3u8"}, "slug": "periodic-table-transition-metals", "video_id": "kCM2mSb4qIU", "youtube_id": "kCM2mSb4qIU", "readable_id": "periodic-table-transition-metals"}, "kOnzZHJYzb4": {"duration": 209, "path": "khan/humanities/becoming-modern/avant-garde-france/realism/rosa-bonheur-plowing-in-the-nivernais-1849/", "keywords": "Rosa Bonheur, Bonheur, Plowing in the Nivernais, French painting, women in art, 19th century, Realism, animals in art, smarthistory", "id": "kOnzZHJYzb4", "title": "Bonheur, Plowing in the Nivernais", "description": "Rosa Bonheur, Plowing in the Nivernais (or The First Dressing), oil on canvas, 1849 (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kOnzZHJYzb4.mp4/kOnzZHJYzb4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kOnzZHJYzb4.mp4/kOnzZHJYzb4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kOnzZHJYzb4.m3u8/kOnzZHJYzb4.m3u8"}, "slug": "rosa-bonheur-plowing-in-the-nivernais-1849", "video_id": "kOnzZHJYzb4", "youtube_id": "kOnzZHJYzb4", "readable_id": "rosa-bonheur-plowing-in-the-nivernais-1849"}, "kjAjlkzkvBU": {"duration": 770, "path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/crash-course-world-history-31/", "keywords": "crash course", "id": "kjAjlkzkvBU", "title": "Latin American Revolutions", "description": "In which John Green talks about the many revolutions of Latin America in the 19th century. At the beginning of the 1800s, Latin America was firmly under the control of Spain and Portugal. The revolutionary zeal that had recently created the United States and had taken off Louis XVI's head in France arrived in South America, and a racially diverse group of people who felt more South American than European took over. John covers the soft revolution of Brazil, in which Prince Pedro boldly seized power from his father, but promised to give it back if King Jo\u00e3o ever returned to Brazil. He also covers the decidedly more violent revolutions in Mexico, Venezuela, and Argentina. Watch the video to see Sim\u00f3n Bol\u00edvar's dream of a United South America crushed, even as he manages to liberate a bunch of countries and get two currencies and about a thousand schools and parks named after him.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kjAjlkzkvBU.mp4/kjAjlkzkvBU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kjAjlkzkvBU.mp4/kjAjlkzkvBU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kjAjlkzkvBU.m3u8/kjAjlkzkvBU.m3u8"}, "slug": "crash-course-world-history-31", "video_id": "kjAjlkzkvBU", "youtube_id": "kjAjlkzkvBU", "readable_id": "crash-course-world-history-31"}, "l3hw0twZSCc": {"duration": 660, "path": "khan/science/physics/electricity-magnetism/magnetic-field-current-carrying-wire/magnetism-7/", "keywords": "physics, magnetism, current", "id": "l3hw0twZSCc", "title": "Magnetic force between two currents going in the same direction", "description": "Sal shows how to determine the magnetic force between two currents going in the same direction.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/l3hw0twZSCc.mp4/l3hw0twZSCc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/l3hw0twZSCc.mp4/l3hw0twZSCc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/l3hw0twZSCc.m3u8/l3hw0twZSCc.m3u8"}, "slug": "magnetism-7", "video_id": "l3hw0twZSCc", "youtube_id": "l3hw0twZSCc", "readable_id": "magnetism-7"}, "LE_aQAur7nI": {"duration": 207, "path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/lin-alg-orthogonal-complement-of-the-nullspace/", "keywords": "orthogonal, complement", "id": "LE_aQAur7nI", "title": "Orthogonal complement of the nullspace", "description": "The orthogonal complement of the nullspace and left nullspace.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LE_aQAur7nI.mp4/LE_aQAur7nI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LE_aQAur7nI.mp4/LE_aQAur7nI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LE_aQAur7nI.m3u8/LE_aQAur7nI.m3u8"}, "slug": "lin-alg-orthogonal-complement-of-the-nullspace", "video_id": "LE_aQAur7nI", "youtube_id": "LE_aQAur7nI", "readable_id": "lin-alg-orthogonal-complement-of-the-nullspace"}, "BukTc4q9BMc": {"duration": 51, "path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/correction-of-force-of-friction-keeping-the-block-stationary/", "keywords": "Correction, to, Force, of, Friction, Keeping, the, Block, Stationary", "id": "BukTc4q9BMc", "title": "Correction to force of friction keeping the block stationary", "description": "Correction to Force of Friction Keeping the Block Stationary", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BukTc4q9BMc.mp4/BukTc4q9BMc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BukTc4q9BMc.mp4/BukTc4q9BMc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BukTc4q9BMc.m3u8/BukTc4q9BMc.m3u8"}, "slug": "correction-of-force-of-friction-keeping-the-block-stationary", "video_id": "BukTc4q9BMc", "youtube_id": "BukTc4q9BMc", "readable_id": "correction-of-force-of-friction-keeping-the-block-stationary"}, "pJ8KwRztfF0": {"duration": 271, "path": "khan/math/early-math/cc-early-math-measure-data-topic/cc-early-math-money/counting-american-coins/", "keywords": "", "id": "pJ8KwRztfF0", "title": "Counting American coins", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pJ8KwRztfF0.mp4/pJ8KwRztfF0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pJ8KwRztfF0.mp4/pJ8KwRztfF0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pJ8KwRztfF0.m3u8/pJ8KwRztfF0.m3u8"}, "slug": "counting-american-coins", "video_id": "pJ8KwRztfF0", "youtube_id": "pJ8KwRztfF0", "readable_id": "counting-american-coins"}, "vsjl4aE2VkA": {"duration": 333, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/roettgen-pieta/", "keywords": "", "id": "vsjl4aE2VkA", "title": "R\u00f6ttgen Piet\u00e0", "description": "R\u00f6ttgen Piet\u00e0, c. 1300-25, painted wood, 34 1/2 inches high (Rheinisches Landesmuseum, Bonn). \u00a0Speakers: Dr. Nancy Ross and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vsjl4aE2VkA.mp4/vsjl4aE2VkA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vsjl4aE2VkA.mp4/vsjl4aE2VkA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vsjl4aE2VkA.m3u8/vsjl4aE2VkA.m3u8"}, "slug": "roettgen-pieta", "video_id": "vsjl4aE2VkA", "youtube_id": "vsjl4aE2VkA", "readable_id": "roettgen-pieta"}, "vdpyWeiHXmU": {"duration": 252, "path": "khan/math/geometry/basic-geometry/cross-sections/rotating-2d-shapes-in-3d/", "keywords": "", "id": "vdpyWeiHXmU", "title": "Rotating 2D shapes in 3D", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vdpyWeiHXmU.mp4/vdpyWeiHXmU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vdpyWeiHXmU.mp4/vdpyWeiHXmU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vdpyWeiHXmU.m3u8/vdpyWeiHXmU.m3u8"}, "slug": "rotating-2d-shapes-in-3d", "video_id": "vdpyWeiHXmU", "youtube_id": "vdpyWeiHXmU", "readable_id": "rotating-2d-shapes-in-3d"}, "1pHhMX0_4Bw": {"duration": 148, "path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/classifying-shapes/", "keywords": "", "id": "1pHhMX0_4Bw", "title": "Quadrilaterals: classifying shapes", "description": "Let's see how well you classify shapes by determining what properties match each kind of quadrilateral.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1pHhMX0_4Bw.mp4/1pHhMX0_4Bw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1pHhMX0_4Bw.mp4/1pHhMX0_4Bw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1pHhMX0_4Bw.m3u8/1pHhMX0_4Bw.m3u8"}, "slug": "classifying-shapes", "video_id": "1pHhMX0_4Bw", "youtube_id": "1pHhMX0_4Bw", "readable_id": "classifying-shapes"}, "xSixUm1cXSw": {"duration": 170, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/rembrandt-a-girl-at-a-window-1645/", "keywords": "Rembrandt, Dulwich Picture Gallery, Art History, Smarthistory", "id": "xSixUm1cXSw", "title": "Rembrandt, Girl at a Window", "description": "Rembrandt Harmensz van Rijn, Girl at a Window, 1645, oil on canvas, 32 x 24 in. (81.6 x 61 cm), (Dulwich Picture Gallery, London) Speakers: Pippa Couch, Rachel Ropeik", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xSixUm1cXSw.mp4/xSixUm1cXSw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xSixUm1cXSw.mp4/xSixUm1cXSw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xSixUm1cXSw.m3u8/xSixUm1cXSw.m3u8"}, "slug": "rembrandt-a-girl-at-a-window-1645", "video_id": "xSixUm1cXSw", "youtube_id": "xSixUm1cXSw", "readable_id": "rembrandt-a-girl-at-a-window-1645"}, "1CxRVVGGNJU": {"duration": 206, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/backwardation-bullish-or-bearish/", "keywords": "finance, gold, oil, silver", "id": "1CxRVVGGNJU", "title": "Backwardation bullish or bearish", "description": "Thinking about why backwardation in commodities markets is bullish", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1CxRVVGGNJU.mp4/1CxRVVGGNJU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1CxRVVGGNJU.mp4/1CxRVVGGNJU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1CxRVVGGNJU.m3u8/1CxRVVGGNJU.m3u8"}, "slug": "backwardation-bullish-or-bearish", "video_id": "1CxRVVGGNJU", "youtube_id": "1CxRVVGGNJU", "readable_id": "backwardation-bullish-or-bearish"}, "hmj3_zbz2eg": {"duration": 363, "path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/triangle-angle-example-1/", "keywords": "geometry", "id": "hmj3_zbz2eg", "title": "Triangle angle example 1", "description": "Figuring out angles in a triangle. A little about exterior angles being the sum of the remote interior angles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hmj3_zbz2eg.mp4/hmj3_zbz2eg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hmj3_zbz2eg.mp4/hmj3_zbz2eg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hmj3_zbz2eg.m3u8/hmj3_zbz2eg.m3u8"}, "slug": "triangle-angle-example-1", "video_id": "hmj3_zbz2eg", "youtube_id": "hmj3_zbz2eg", "readable_id": "triangle-angle-example-1"}, "-qP2831i9Rc": {"duration": 102, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-4/", "keywords": "", "id": "-qP2831i9Rc", "title": "4 Solving for an angle", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-qP2831i9Rc.mp4/-qP2831i9Rc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-qP2831i9Rc.mp4/-qP2831i9Rc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-qP2831i9Rc.m3u8/-qP2831i9Rc.m3u8"}, "slug": "sat-getting-ready-2-4", "video_id": "-qP2831i9Rc", "youtube_id": "-qP2831i9Rc", "readable_id": "sat-getting-ready-2-4"}, "CkNArgNPI2Y": {"duration": 636, "path": "khan/economics-finance-domain/core-finance/money-and-banking/greek-debt-crisis/greek-financial-crisis-part-2/", "keywords": "greece, financial, crisis, eurozone, euro", "id": "CkNArgNPI2Y", "title": "Greek financial crisis (part 2)", "description": "What Greece could have done if it had its own currency", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CkNArgNPI2Y.mp4/CkNArgNPI2Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CkNArgNPI2Y.mp4/CkNArgNPI2Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CkNArgNPI2Y.m3u8/CkNArgNPI2Y.m3u8"}, "slug": "greek-financial-crisis-part-2", "video_id": "CkNArgNPI2Y", "youtube_id": "CkNArgNPI2Y", "readable_id": "greek-financial-crisis-part-2"}, "8wIodo1HD4Y": {"duration": 554, "path": "khan/test-prep/mcat/chemical-processes/kinetics/rate-of-reaction/", "keywords": "", "id": "8wIodo1HD4Y", "title": "Rate of reaction", "description": "Definition of reaction rate, and examples of calculating the average rate of reaction.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8wIodo1HD4Y.mp4/8wIodo1HD4Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8wIodo1HD4Y.mp4/8wIodo1HD4Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8wIodo1HD4Y.m3u8/8wIodo1HD4Y.m3u8"}, "slug": "rate-of-reaction", "video_id": "8wIodo1HD4Y", "youtube_id": "8wIodo1HD4Y", "readable_id": "rate-of-reaction"}, "MKWBx78L7Qg": {"duration": 307, "path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-introduction/", "keywords": "", "id": "MKWBx78L7Qg", "title": "Chain rule introduction", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MKWBx78L7Qg.mp4/MKWBx78L7Qg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MKWBx78L7Qg.mp4/MKWBx78L7Qg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MKWBx78L7Qg.m3u8/MKWBx78L7Qg.m3u8"}, "slug": "chain-rule-introduction", "video_id": "MKWBx78L7Qg", "youtube_id": "MKWBx78L7Qg", "readable_id": "chain-rule-introduction"}, "KD46pC_KFWk": {"duration": 576, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-12/", "keywords": "inequality, word, problem", "id": "KD46pC_KFWk", "title": "2003 AIME II problem 12", "description": "Minimum members in a committee", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KD46pC_KFWk.mp4/KD46pC_KFWk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KD46pC_KFWk.mp4/KD46pC_KFWk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KD46pC_KFWk.m3u8/KD46pC_KFWk.m3u8"}, "slug": "2003-aime-ii-problem-12", "video_id": "KD46pC_KFWk", "youtube_id": "KD46pC_KFWk", "readable_id": "2003-aime-ii-problem-12"}, "7ym7FWyCzKI": {"duration": 341, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/pozzo-glorification-of-saint-ignatius-ceiling-fresco-in-the-nave-of-sant-ignazio-rome-1691-94/", "keywords": "", "id": "7ym7FWyCzKI", "title": "Pozzo, Glorification of Saint Ignatius, Sant'Ignazio", "description": "Fra Andrea Pozzo, Glorification of Saint Ignatius, ceiling fresco in the nave of Sant'Ignazio, Rome, 1691-94\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7ym7FWyCzKI.mp4/7ym7FWyCzKI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7ym7FWyCzKI.mp4/7ym7FWyCzKI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7ym7FWyCzKI.m3u8/7ym7FWyCzKI.m3u8"}, "slug": "pozzo-glorification-of-saint-ignatius-ceiling-fresco-in-the-nave-of-sant-ignazio-rome-1691-94", "video_id": "7ym7FWyCzKI", "youtube_id": "7ym7FWyCzKI", "readable_id": "pozzo-glorification-of-saint-ignatius-ceiling-fresco-in-the-nave-of-sant-ignazio-rome-1691-94"}, "xuQcB-oo-4U": {"duration": 834, "path": "khan/science/discoveries-projects/reverse-engin/reverse-engineering/what-is-inside-an-alarm-clock-radio-1/", "keywords": "radio, alarm clock, am, fm, frequency modulation, amplitude modulation, integrated circuit, clock divider, crystal oscillator, diode, bridge rectifier, transformer, AC, DC, alternating current, direct current, variable capacitors, ferrite rod antenna, ante", "id": "xuQcB-oo-4U", "title": "What is inside an alarm clock radio?", "description": "In this video we explore what is inside an alarm clock, how it is made, and how it works.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xuQcB-oo-4U.mp4/xuQcB-oo-4U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xuQcB-oo-4U.mp4/xuQcB-oo-4U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xuQcB-oo-4U.m3u8/xuQcB-oo-4U.m3u8"}, "slug": "what-is-inside-an-alarm-clock-radio-1", "video_id": "xuQcB-oo-4U", "youtube_id": "xuQcB-oo-4U", "readable_id": "what-is-inside-an-alarm-clock-radio-1"}, "ucghWyc2_qs": {"duration": 449, "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-6c/", "keywords": "AP, advanced, placement, calculus", "id": "ucghWyc2_qs", "title": "2011 Calculus AB free response #6c", "description": "Average value of a piecewise-defined function on an interval", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ucghWyc2_qs.mp4/ucghWyc2_qs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ucghWyc2_qs.mp4/ucghWyc2_qs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ucghWyc2_qs.m3u8/ucghWyc2_qs.m3u8"}, "slug": "2011-calculus-ab-free-response-6c", "video_id": "ucghWyc2_qs", "youtube_id": "ucghWyc2_qs", "readable_id": "2011-calculus-ab-free-response-6c"}, "TStjgUmL1RQ": {"duration": 553, "path": "khan/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/chemical-reactions-introduction/", "keywords": "education,online learning,learning,lessons,Chemical Reaction (Literature Subject),reactant,product,reversible,irreversible", "id": "TStjgUmL1RQ", "title": "Chemical reactions introduction", "description": "Reactants and products in reversible and irreversible chemical reactions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TStjgUmL1RQ.mp4/TStjgUmL1RQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TStjgUmL1RQ.mp4/TStjgUmL1RQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TStjgUmL1RQ.m3u8/TStjgUmL1RQ.m3u8"}, "slug": "chemical-reactions-introduction", "video_id": "TStjgUmL1RQ", "youtube_id": "TStjgUmL1RQ", "readable_id": "chemical-reactions-introduction"}, "6agzj3A9IgA": {"duration": 324, "path": "khan/math/algebra/quadratics/completing_the_square/ex2-completing-the-square/", "keywords": "U10_L1_T2_we2, Completing, the, Square, CC_39336_A-REI_4_a, CC_39336_A-REI_4_b, CC_39336_A-SSE_3_b", "id": "6agzj3A9IgA", "title": "Example 2: Completing the square", "description": "U10_L1_T2_we2 Completing the Square 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6agzj3A9IgA.mp4/6agzj3A9IgA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6agzj3A9IgA.mp4/6agzj3A9IgA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6agzj3A9IgA.m3u8/6agzj3A9IgA.m3u8"}, "slug": "ex2-completing-the-square", "video_id": "6agzj3A9IgA", "youtube_id": "6agzj3A9IgA", "readable_id": "ex2-completing-the-square"}, "XoBlfbrdBpQ": {"duration": 295, "path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/comparison-test-convergence/", "keywords": "", "id": "XoBlfbrdBpQ", "title": "Comparison test to show convergence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XoBlfbrdBpQ.mp4/XoBlfbrdBpQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XoBlfbrdBpQ.mp4/XoBlfbrdBpQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XoBlfbrdBpQ.m3u8/XoBlfbrdBpQ.m3u8"}, "slug": "comparison-test-convergence", "video_id": "XoBlfbrdBpQ", "youtube_id": "XoBlfbrdBpQ", "readable_id": "comparison-test-convergence"}, "g-SfwjbpA4U": {"duration": 132, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-numbers-pre-alg/postive-improper-fractions-on-the-number-line/", "keywords": "", "id": "g-SfwjbpA4U", "title": "Mixed number or improper fraction on a number line", "description": "Fraction or mixed number...either way you should end up on the same spot on the number line. Give it a try with us.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g-SfwjbpA4U.mp4/g-SfwjbpA4U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g-SfwjbpA4U.mp4/g-SfwjbpA4U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g-SfwjbpA4U.m3u8/g-SfwjbpA4U.m3u8"}, "slug": "postive-improper-fractions-on-the-number-line", "video_id": "g-SfwjbpA4U", "youtube_id": "g-SfwjbpA4U", "readable_id": "postive-improper-fractions-on-the-number-line"}, "OW0Yq2nWyuY": {"duration": 411, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/uterine-inversion/", "keywords": "", "id": "OW0Yq2nWyuY", "title": "Uterine inversion", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OW0Yq2nWyuY.mp4/OW0Yq2nWyuY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OW0Yq2nWyuY.mp4/OW0Yq2nWyuY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OW0Yq2nWyuY.m3u8/OW0Yq2nWyuY.m3u8"}, "slug": "uterine-inversion", "video_id": "OW0Yq2nWyuY", "youtube_id": "OW0Yq2nWyuY", "readable_id": "uterine-inversion"}, "NFDMXwwzyIM": {"duration": 612, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-17-what-happened-to-the-gold/", "keywords": "gold, standard, fiat, currency, wealth", "id": "NFDMXwwzyIM", "title": "Banking 17: What happened to the gold?", "description": "Getting off the gold standard. A short discussion of the meaning of wealth.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NFDMXwwzyIM.mp4/NFDMXwwzyIM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NFDMXwwzyIM.mp4/NFDMXwwzyIM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NFDMXwwzyIM.m3u8/NFDMXwwzyIM.m3u8"}, "slug": "banking-17-what-happened-to-the-gold", "video_id": "NFDMXwwzyIM", "youtube_id": "NFDMXwwzyIM", "readable_id": "banking-17-what-happened-to-the-gold"}, "BTWLwoaNeBA": {"duration": 255, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/seismic-waves-tutorial/why-s-waves-only-travel-in-solids/", "keywords": "Why, S-Waves, Only, Travel, in, Solids", "id": "BTWLwoaNeBA", "title": "Why S-waves only travel in solids", "description": "Why S-Waves Only Travel in Solids", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BTWLwoaNeBA.mp4/BTWLwoaNeBA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BTWLwoaNeBA.mp4/BTWLwoaNeBA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BTWLwoaNeBA.m3u8/BTWLwoaNeBA.m3u8"}, "slug": "why-s-waves-only-travel-in-solids", "video_id": "BTWLwoaNeBA", "youtube_id": "BTWLwoaNeBA", "readable_id": "why-s-waves-only-travel-in-solids"}, "stSvcwY0RWI": {"duration": 368, "path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/schizophrenia-treatment/", "keywords": "Schizophrenia (Disease Or Medical Condition),Health (Industry),Therapy (Literature Subject)", "id": "stSvcwY0RWI", "title": "Schizophrenia treatment", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/stSvcwY0RWI.mp4/stSvcwY0RWI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/stSvcwY0RWI.mp4/stSvcwY0RWI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/stSvcwY0RWI.m3u8/stSvcwY0RWI.m3u8"}, "slug": "schizophrenia-treatment", "video_id": "stSvcwY0RWI", "youtube_id": "stSvcwY0RWI", "readable_id": "schizophrenia-treatment"}, "arWBWBfNMB8": {"duration": 216, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/sat-4-economists/", "keywords": "", "id": "arWBWBfNMB8", "title": "4 Economists", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/arWBWBfNMB8.mp4/arWBWBfNMB8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/arWBWBfNMB8.mp4/arWBWBfNMB8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/arWBWBfNMB8.m3u8/arWBWBfNMB8.m3u8"}, "slug": "sat-4-economists", "video_id": "arWBWBfNMB8", "youtube_id": "arWBWBfNMB8", "readable_id": "sat-4-economists"}, "-epr8lPIZYE": {"duration": 570, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/what-is-capital/", "keywords": "", "id": "-epr8lPIZYE", "title": "What is capital?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-epr8lPIZYE.mp4/-epr8lPIZYE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-epr8lPIZYE.mp4/-epr8lPIZYE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-epr8lPIZYE.m3u8/-epr8lPIZYE.m3u8"}, "slug": "what-is-capital", "video_id": "-epr8lPIZYE", "youtube_id": "-epr8lPIZYE", "readable_id": "what-is-capital"}, "M7PnxSQedkM": {"duration": 267, "path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/practice-determining-oxidation-states/", "keywords": "", "id": "M7PnxSQedkM", "title": "Practice determining oxidation states", "description": "Determining oxidation numbers in magnesium oxide and magnesium hydroxide.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M7PnxSQedkM.mp4/M7PnxSQedkM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M7PnxSQedkM.mp4/M7PnxSQedkM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M7PnxSQedkM.m3u8/M7PnxSQedkM.m3u8"}, "slug": "practice-determining-oxidation-states", "video_id": "M7PnxSQedkM", "youtube_id": "M7PnxSQedkM", "readable_id": "practice-determining-oxidation-states"}, "1rXISOamWNw": {"duration": 49, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-12/", "keywords": "", "id": "1rXISOamWNw", "title": "12 Solving for half of j", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1rXISOamWNw.mp4/1rXISOamWNw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1rXISOamWNw.mp4/1rXISOamWNw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1rXISOamWNw.m3u8/1rXISOamWNw.m3u8"}, "slug": "2013-sat-practice-6-12", "video_id": "1rXISOamWNw", "youtube_id": "1rXISOamWNw", "readable_id": "2013-sat-practice-6-12"}, "95tChNVzodY": {"duration": 571, "path": "khan/math/algebra/quadratics/completing_the_square/completing-the-square-4/", "keywords": "U10_L1_T2_we4, Completing, the, Square, CC_39336_A-REI_4_a, CC_39336_A-REI_4_b, CC_39336_A-SSE_3_b", "id": "95tChNVzodY", "title": "Completing the square for quadratic formula", "description": "Completing the Square 4", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/95tChNVzodY.mp4/95tChNVzodY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/95tChNVzodY.mp4/95tChNVzodY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/95tChNVzodY.m3u8/95tChNVzodY.m3u8"}, "slug": "completing-the-square-4", "video_id": "95tChNVzodY", "youtube_id": "95tChNVzodY", "readable_id": "completing-the-square-4"}, "aXhHcqQTrIg": {"duration": 234, "path": "khan/partner-content/wi-phi/the-history-of-philosophy/chatelet-part-2/", "keywords": "", "id": "aXhHcqQTrIg", "title": "Early Modern: \u00c9milie du Ch\u00e2telet, Part 2", "description": "In part 2, Andrew Janiak (Duke) further introduces Emilie Du Chatelet, a French philosopher, and her contribution to the debate about the principle of sufficient reason. This video is a part of a series of videos coming from Project Vox (Duke), a project recovering the lost voices of women philosophers.\n\nSpeaker: Dr. Andrew Janiak,\u00a0Creed C. Black Associate Professor of Philosophy, Duke University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aXhHcqQTrIg.mp4/aXhHcqQTrIg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aXhHcqQTrIg.mp4/aXhHcqQTrIg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aXhHcqQTrIg.m3u8/aXhHcqQTrIg.m3u8"}, "slug": "chatelet-part-2", "video_id": "aXhHcqQTrIg", "youtube_id": "aXhHcqQTrIg", "readable_id": "chatelet-part-2"}, "Gx5D09s5X6U": {"duration": 130, "path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/how-to-snakes/", "keywords": "snakes, math, fractal, mathematics, hydra, peano curve, pi", "id": "Gx5D09s5X6U", "title": "How to snakes", "description": "Snakes!\n\nSnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakes.\n\nme: vihart.com\n\nYou can get a box here:\nhttp://www.amazon.com/dp/B003I6USDW?tag=vihartcom-20", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Gx5D09s5X6U.mp4/Gx5D09s5X6U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Gx5D09s5X6U.mp4/Gx5D09s5X6U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Gx5D09s5X6U.m3u8/Gx5D09s5X6U.m3u8"}, "slug": "how-to-snakes", "video_id": "Gx5D09s5X6U", "youtube_id": "Gx5D09s5X6U", "readable_id": "how-to-snakes"}, "fOXo4p4WDKM": {"duration": 529, "path": "khan/math/arithmetic/addition-subtraction/addition_carrying/addition-4/", "keywords": "addition, carrying, CC_2_OA_1, CC_3_NBT_2, CC_4_NBT_4", "id": "fOXo4p4WDKM", "title": "Addition 4", "description": "More practice carrying with multiple digit numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fOXo4p4WDKM.mp4/fOXo4p4WDKM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fOXo4p4WDKM.mp4/fOXo4p4WDKM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fOXo4p4WDKM.m3u8/fOXo4p4WDKM.m3u8"}, "slug": "addition-4", "video_id": "fOXo4p4WDKM", "youtube_id": "fOXo4p4WDKM", "readable_id": "addition-4"}, "1YlXtpF-19A": {"duration": 430, "path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-curves-and-acid-base-indicators/", "keywords": "", "id": "1YlXtpF-19A", "title": "Titration curves and acid-base indicators", "description": "Choosing the best indicator for different titrations depending on the pH at the equivalence point.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1YlXtpF-19A.mp4/1YlXtpF-19A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1YlXtpF-19A.mp4/1YlXtpF-19A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1YlXtpF-19A.m3u8/1YlXtpF-19A.m3u8"}, "slug": "titration-curves-and-acid-base-indicators", "video_id": "1YlXtpF-19A", "youtube_id": "1YlXtpF-19A", "readable_id": "titration-curves-and-acid-base-indicators"}, "O9RPGJcAfJk": {"duration": 499, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/alkane-with-isopropyl-group/", "keywords": "", "id": "O9RPGJcAfJk", "title": "Alkane with isopropyl group", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O9RPGJcAfJk.mp4/O9RPGJcAfJk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O9RPGJcAfJk.mp4/O9RPGJcAfJk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O9RPGJcAfJk.m3u8/O9RPGJcAfJk.m3u8"}, "slug": "alkane-with-isopropyl-group", "video_id": "O9RPGJcAfJk", "youtube_id": "O9RPGJcAfJk", "readable_id": "alkane-with-isopropyl-group"}, "oQpKtm5TtxU": {"duration": 225, "path": "khan/math/precalculus/prob_comb/combinatorics_precalc/permutations-and-combinations-1/", "keywords": "U12_L2_T3_we1, Permutations, and, Combinations", "id": "oQpKtm5TtxU", "title": "Example: Ways to arrange colors", "description": "Thinking about how many ways you can pick four colors from a group of 6", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oQpKtm5TtxU.mp4/oQpKtm5TtxU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oQpKtm5TtxU.mp4/oQpKtm5TtxU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oQpKtm5TtxU.m3u8/oQpKtm5TtxU.m3u8"}, "slug": "permutations-and-combinations-1", "video_id": "oQpKtm5TtxU", "youtube_id": "oQpKtm5TtxU", "readable_id": "permutations-and-combinations-1"}, "AfaFiSLM2hw": {"duration": 173, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/dave-smith/kauffman-dave-smith-3/", "keywords": "", "id": "AfaFiSLM2hw", "title": "Shifting from Loyalty to Accountability", "description": "When Dave Smith came to the harsh realization and he alone was in charge of his future, he took a resourceful route to become an expert in his field. Mixing the desire to make it with the imagination to fake it, he went to great lengths to connect with TekScape IT customers and make them believe that his tiny organization was big enough to solve their trickiest problems.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AfaFiSLM2hw.mp4/AfaFiSLM2hw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AfaFiSLM2hw.mp4/AfaFiSLM2hw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AfaFiSLM2hw.m3u8/AfaFiSLM2hw.m3u8"}, "slug": "kauffman-dave-smith-3", "video_id": "AfaFiSLM2hw", "youtube_id": "AfaFiSLM2hw", "readable_id": "kauffman-dave-smith-3"}, "2Xq2fZCs2oU": {"duration": 387, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-viral-gastroenteritis/", "keywords": "Gastroenteritis (Disease Or Medical Condition),Viral Gastroenteritis,Health (Industry)", "id": "2Xq2fZCs2oU", "title": "What is viral gastroenteritis?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2Xq2fZCs2oU.mp4/2Xq2fZCs2oU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2Xq2fZCs2oU.mp4/2Xq2fZCs2oU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2Xq2fZCs2oU.m3u8/2Xq2fZCs2oU.m3u8"}, "slug": "what-is-viral-gastroenteritis", "video_id": "2Xq2fZCs2oU", "youtube_id": "2Xq2fZCs2oU", "readable_id": "what-is-viral-gastroenteritis"}, "YL10H_EcB-E": {"duration": 580, "path": "khan/economics-finance-domain/core-finance/housing/renting-v-buying/renting-vs-buying-a-home/", "keywords": "mortgage, home, rent, buy, appreciation, taxes, economics", "id": "YL10H_EcB-E", "title": "Renting vs. buying a home", "description": "The math of renting vs. buying a home. Challenging the notion that it is always better to buy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YL10H_EcB-E.mp4/YL10H_EcB-E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YL10H_EcB-E.mp4/YL10H_EcB-E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YL10H_EcB-E.m3u8/YL10H_EcB-E.m3u8"}, "slug": "renting-vs-buying-a-home", "video_id": "YL10H_EcB-E", "youtube_id": "YL10H_EcB-E", "readable_id": "renting-vs-buying-a-home"}, "kK38qqvLQ2I": {"duration": 197, "path": "khan/humanities/renaissance-reformation/northern/holbein/hans-holbein-the-younger-the-merchant-georg-gisze-1532/", "keywords": "Holbein, Merchant, GAP, Google Art Project, Smarthistory, Khan Academy, OER, London, Hanseatic League, Portrait, German, Renaissance, England, Art History, Gem\u00e4ldegalerie, painting, Office, Work, Symbolism", "id": "kK38qqvLQ2I", "title": "Holbein the Younger, the Merchant Georg Gisze", "description": "Hans Holbein the Younger, The Merchant Georg Gisze, 1532, oil on oak, 97.5 x 86.2 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kK38qqvLQ2I.mp4/kK38qqvLQ2I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kK38qqvLQ2I.mp4/kK38qqvLQ2I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kK38qqvLQ2I.m3u8/kK38qqvLQ2I.m3u8"}, "slug": "hans-holbein-the-younger-the-merchant-georg-gisze-1532", "video_id": "kK38qqvLQ2I", "youtube_id": "kK38qqvLQ2I", "readable_id": "hans-holbein-the-younger-the-merchant-georg-gisze-1532"}, "5MOn8X-tyFw": {"duration": 669, "path": "khan/test-prep/mcat/organ-systems/hematologic-system/what-s-inside-of-blood/", "keywords": "", "id": "5MOn8X-tyFw", "title": "What's inside of blood?", "description": "Spin down your blood and find out what it's made up of. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5MOn8X-tyFw.mp4/5MOn8X-tyFw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5MOn8X-tyFw.mp4/5MOn8X-tyFw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5MOn8X-tyFw.m3u8/5MOn8X-tyFw.m3u8"}, "slug": "what-s-inside-of-blood", "video_id": "5MOn8X-tyFw", "youtube_id": "5MOn8X-tyFw", "readable_id": "what-s-inside-of-blood"}, "3UcjojHetfE": {"duration": 366, "path": "khan/test-prep/mcat/behavior/theories-personality/humanistic-theory/", "keywords": "humanistic theory", "id": "3UcjojHetfE", "title": "Humanistic theory", "description": "A major branch of psychology is Humanism. Learn what the humanistic theorists have to say about how we develop our personality. By Shreena Desai.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3UcjojHetfE.mp4/3UcjojHetfE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3UcjojHetfE.mp4/3UcjojHetfE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3UcjojHetfE.m3u8/3UcjojHetfE.m3u8"}, "slug": "humanistic-theory", "video_id": "3UcjojHetfE", "youtube_id": "3UcjojHetfE", "readable_id": "humanistic-theory"}, "9YyLwzJunGw": {"duration": 135, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-12/", "keywords": "", "id": "9YyLwzJunGw", "title": "12 Corresponding side lengths", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9YyLwzJunGw.mp4/9YyLwzJunGw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9YyLwzJunGw.mp4/9YyLwzJunGw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9YyLwzJunGw.m3u8/9YyLwzJunGw.m3u8"}, "slug": "sat-2010-may-9-12", "video_id": "9YyLwzJunGw", "youtube_id": "9YyLwzJunGw", "readable_id": "sat-2010-may-9-12"}, "3tyM_M3FQNM": {"duration": 368, "path": "khan/math/precalculus/precalc-matrices/transformation-matrix/matrix-transformation-quadrilateral/", "keywords": "", "id": "3tyM_M3FQNM", "title": "Transforming a quadrilateral", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3tyM_M3FQNM.mp4/3tyM_M3FQNM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3tyM_M3FQNM.mp4/3tyM_M3FQNM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3tyM_M3FQNM.m3u8/3tyM_M3FQNM.m3u8"}, "slug": "matrix-transformation-quadrilateral", "video_id": "3tyM_M3FQNM", "youtube_id": "3tyM_M3FQNM", "readable_id": "matrix-transformation-quadrilateral"}, "o5QRdHH8aeQ": {"duration": 539, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/cont-comp-int-and-e/continuously-compounding-interest-formula-e/", "keywords": "", "id": "o5QRdHH8aeQ", "title": "Formula for continuously compounding interest", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o5QRdHH8aeQ.mp4/o5QRdHH8aeQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o5QRdHH8aeQ.mp4/o5QRdHH8aeQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o5QRdHH8aeQ.m3u8/o5QRdHH8aeQ.m3u8"}, "slug": "continuously-compounding-interest-formula-e", "video_id": "o5QRdHH8aeQ", "youtube_id": "o5QRdHH8aeQ", "readable_id": "continuously-compounding-interest-formula-e"}, "R8YKuGJ0plI": {"duration": 294, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-numbers-pre-alg/comparing-improper-fractions-and-mixed-numbers/", "keywords": "fraction, worked, examples", "id": "R8YKuGJ0plI", "title": "Comparing improper fractions and mixed numbers", "description": "Worked examples comparing improper fractions and mixed numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R8YKuGJ0plI.mp4/R8YKuGJ0plI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R8YKuGJ0plI.mp4/R8YKuGJ0plI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R8YKuGJ0plI.m3u8/R8YKuGJ0plI.m3u8"}, "slug": "comparing-improper-fractions-and-mixed-numbers", "video_id": "R8YKuGJ0plI", "youtube_id": "R8YKuGJ0plI", "readable_id": "comparing-improper-fractions-and-mixed-numbers"}, "zk3vlhz1b6k": {"duration": 483, "path": "khan/science/biology/structure-of-a-cell/introduction-to-cells/cell-theory/", "keywords": "education,online learning,learning,lessons,cell theory,hooke,leeuwenhoek", "id": "zk3vlhz1b6k", "title": "Cell theory", "description": "Introduction to cell theory--the idea that 1) all living things are made of one or more cells, 2) cells are the basic unit of life and 3) all cells come from other cells. Explore the roles that Hooke, Leeuwenhoek and others played in developing cell theory.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zk3vlhz1b6k.mp4/zk3vlhz1b6k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zk3vlhz1b6k.mp4/zk3vlhz1b6k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zk3vlhz1b6k.m3u8/zk3vlhz1b6k.m3u8"}, "slug": "cell-theory", "video_id": "zk3vlhz1b6k", "youtube_id": "zk3vlhz1b6k", "readable_id": "cell-theory"}, "wo7DSaPP8hQ": {"duration": 399, "path": "khan/math/algebra/linear_inequalities/inequalities/interpreting-inequalities/", "keywords": "U05_L1_T1_we1, Interpreting, Inequalities, CC_6_EE_8, CC_7_EE_4, CC_7_EE_4_b, CC_39336_A-CED_1, CC_39336_A-REI_3", "id": "wo7DSaPP8hQ", "title": "Constructing and solving a two-step inequality", "description": "We'll talk you through this fun and challenging inequality problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wo7DSaPP8hQ.mp4/wo7DSaPP8hQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wo7DSaPP8hQ.mp4/wo7DSaPP8hQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wo7DSaPP8hQ.m3u8/wo7DSaPP8hQ.m3u8"}, "slug": "interpreting-inequalities", "video_id": "wo7DSaPP8hQ", "youtube_id": "wo7DSaPP8hQ", "readable_id": "interpreting-inequalities"}, "-lUEWEEpmIo": {"duration": 127, "path": "khan/math/algebra-basics/core-algebra-foundations/algebra-foundations-decimal-operations/taking-a-percentage-example/", "keywords": "", "id": "-lUEWEEpmIo", "title": "Percentage of a whole number", "description": "We hope you're beginning to see that there's more than one way to skin a cat. In other words, there are several different ways to solve problems involving percentages, decimals, and fractions. Watch as find the percentage of a whole number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-lUEWEEpmIo.mp4/-lUEWEEpmIo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-lUEWEEpmIo.mp4/-lUEWEEpmIo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-lUEWEEpmIo.m3u8/-lUEWEEpmIo.m3u8"}, "slug": "taking-a-percentage-example", "video_id": "-lUEWEEpmIo", "youtube_id": "-lUEWEEpmIo", "readable_id": "taking-a-percentage-example"}, "FK1s1-OJ5BE": {"duration": 718, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/plate-tectonics-geological-features-of-divergent-plate-boundaries/", "keywords": "Plate, Tectonics, --, Geological, Features, of, Divergent, Boundaries", "id": "FK1s1-OJ5BE", "title": "Plate tectonics: Geological features of divergent plate boundaries", "description": "Plate Tectonics -- Geological Features of Divergent Plate Boundaries", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FK1s1-OJ5BE.mp4/FK1s1-OJ5BE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FK1s1-OJ5BE.mp4/FK1s1-OJ5BE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FK1s1-OJ5BE.m3u8/FK1s1-OJ5BE.m3u8"}, "slug": "plate-tectonics-geological-features-of-divergent-plate-boundaries", "video_id": "FK1s1-OJ5BE", "youtube_id": "FK1s1-OJ5BE", "readable_id": "plate-tectonics-geological-features-of-divergent-plate-boundaries"}, "NZINmtuTSu0": {"duration": 2414, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/a-conversation-with-drew-houston/", "keywords": "", "id": "NZINmtuTSu0", "title": "Drew Houston - CEO and Founder of Dropbox", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NZINmtuTSu0.mp4/NZINmtuTSu0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NZINmtuTSu0.mp4/NZINmtuTSu0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NZINmtuTSu0.m3u8/NZINmtuTSu0.m3u8"}, "slug": "a-conversation-with-drew-houston", "video_id": "NZINmtuTSu0", "youtube_id": "NZINmtuTSu0", "readable_id": "a-conversation-with-drew-houston"}, "eZZkhSl8lMA": {"duration": 628, "path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-12-lone-star-transaction/", "keywords": "merill, lynch, lone, star, CDOs", "id": "eZZkhSl8lMA", "title": "Bailout 12: Lone Star transaction", "description": "A real life example of a transaction involving CDOs.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eZZkhSl8lMA.mp4/eZZkhSl8lMA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eZZkhSl8lMA.mp4/eZZkhSl8lMA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eZZkhSl8lMA.m3u8/eZZkhSl8lMA.m3u8"}, "slug": "bailout-12-lone-star-transaction", "video_id": "eZZkhSl8lMA", "youtube_id": "eZZkhSl8lMA", "readable_id": "bailout-12-lone-star-transaction"}, "Ei5mgFtUGns": {"duration": 350, "path": "khan/math/early-math/cc-early-math-measure-data-topic/cc-early-math-length-word-problems/length-word-problems/", "keywords": "", "id": "Ei5mgFtUGns", "title": "Length word problems", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ei5mgFtUGns.mp4/Ei5mgFtUGns.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ei5mgFtUGns.mp4/Ei5mgFtUGns.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ei5mgFtUGns.m3u8/Ei5mgFtUGns.m3u8"}, "slug": "length-word-problems", "video_id": "Ei5mgFtUGns", "youtube_id": "Ei5mgFtUGns", "readable_id": "length-word-problems"}, "JNm3M9cqWyc": {"duration": 589, "path": "khan/math/probability/statistics-inferential/sampling_distribution/central-limit-theorem/", "keywords": "central, limit, theorem, sampling, distribution, of, the, mean, CC_6_SP_2, CC_6_SP_4, CC_6_SP_5_a, CC_6_SP_5_c, CC_6_SP_5_d, CC_7_SP_1, CC_7_SP_2", "id": "JNm3M9cqWyc", "title": "Central limit theorem", "description": "Introduction to the central limit theorem and the sampling distribution of the mean", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JNm3M9cqWyc.mp4/JNm3M9cqWyc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JNm3M9cqWyc.mp4/JNm3M9cqWyc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JNm3M9cqWyc.m3u8/JNm3M9cqWyc.m3u8"}, "slug": "central-limit-theorem", "video_id": "JNm3M9cqWyc", "youtube_id": "JNm3M9cqWyc", "readable_id": "central-limit-theorem"}, "hHBaf7PfvaY": {"duration": 399, "path": "khan/humanities/art-oceania/polynesia/maori-meeting-house/", "keywords": "Maori, British Museum, New Zealand, Polynesia", "id": "hHBaf7PfvaY", "title": "A welcome to a Maori meeting house", "description": "Ceremony of blessing for a display of a Maori meeting house in Living and Dying, the Wellcome Trust Gallery, at the British Museum.\nVideo features Natasha McKinney, curator, George Nuku, artist, and Kateia Burrows, Ngati Porou, Aitutaki.\n\nSpeakers in the ceremony: Karl Burrows, Ngati Maru, Te Ati Awa, Whanganui.\n\n\u00a9Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hHBaf7PfvaY.mp4/hHBaf7PfvaY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hHBaf7PfvaY.mp4/hHBaf7PfvaY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hHBaf7PfvaY.m3u8/hHBaf7PfvaY.m3u8"}, "slug": "maori-meeting-house", "video_id": "hHBaf7PfvaY", "youtube_id": "hHBaf7PfvaY", "readable_id": "maori-meeting-house"}, "QsqnJHggDaY": {"duration": 594, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/asthma-diagnosis/", "keywords": "", "id": "QsqnJHggDaY", "title": "Asthma diagnosis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QsqnJHggDaY.mp4/QsqnJHggDaY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QsqnJHggDaY.mp4/QsqnJHggDaY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QsqnJHggDaY.m3u8/QsqnJHggDaY.m3u8"}, "slug": "asthma-diagnosis", "video_id": "QsqnJHggDaY", "youtube_id": "QsqnJHggDaY", "readable_id": "asthma-diagnosis"}, "lJvXorny8xw": {"duration": 196, "path": "khan/humanities/medieval-world/medieval-book/making-medieval-book/listening-to-the-medieval-book/", "keywords": "art history,", "id": "lJvXorny8xw", "title": "Listening to the Medieval book", "description": "Dr. Erik Kwakkel and Dr. Beth Harris look at two manuscripts: 1) Boethius, De institutione arithmetica, c. 1100, \u00a0The Hague), Royal Library, MS 78 E 59 and 2) Paris Bible, mid 13th century, The Hague, Royal Library, \u00a0MS 132 F 21 . With special thanks to Ed van der Vlist, Curator of Medieval Manuscripts, Koninklijke Bibliotheek, National Library of the Netherlands", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lJvXorny8xw.mp4/lJvXorny8xw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lJvXorny8xw.mp4/lJvXorny8xw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lJvXorny8xw.m3u8/lJvXorny8xw.m3u8"}, "slug": "listening-to-the-medieval-book", "video_id": "lJvXorny8xw", "youtube_id": "lJvXorny8xw", "readable_id": "listening-to-the-medieval-book"}, "Iwmb1p25ws4": {"duration": 821, "path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/second-law-of-thermodynamics/", "keywords": "", "id": "Iwmb1p25ws4", "title": "Second law of thermodynamics", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Iwmb1p25ws4.mp4/Iwmb1p25ws4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Iwmb1p25ws4.mp4/Iwmb1p25ws4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Iwmb1p25ws4.m3u8/Iwmb1p25ws4.m3u8"}, "slug": "second-law-of-thermodynamics", "video_id": "Iwmb1p25ws4", "youtube_id": "Iwmb1p25ws4", "readable_id": "second-law-of-thermodynamics"}, "ve5hfX3ywk0": {"duration": 474, "path": "khan/science/organic-chemistry/organic-structures/acid-base-review/using-pka-values-to-predict-the-position-of-equilibrium-new/", "keywords": "", "id": "ve5hfX3ywk0", "title": "Using pKa values to predict the position of equilibrium", "description": "How to use pKa values to predict the position of equilibrium for organic acid-base reactions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ve5hfX3ywk0.mp4/ve5hfX3ywk0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ve5hfX3ywk0.mp4/ve5hfX3ywk0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ve5hfX3ywk0.m3u8/ve5hfX3ywk0.m3u8"}, "slug": "using-pka-values-to-predict-the-position-of-equilibrium-new", "video_id": "ve5hfX3ywk0", "youtube_id": "ve5hfX3ywk0", "readable_id": "using-pka-values-to-predict-the-position-of-equilibrium-new"}, "tDGVAyx-_xQ": {"duration": 185, "path": "khan/college-admissions/applying-to-college/letters-of-recommendation/requesting-letters-of-recommendation/", "keywords": "", "id": "tDGVAyx-_xQ", "title": "Requesting letters of recommendation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tDGVAyx-_xQ.mp4/tDGVAyx-_xQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tDGVAyx-_xQ.mp4/tDGVAyx-_xQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tDGVAyx-_xQ.m3u8/tDGVAyx-_xQ.m3u8"}, "slug": "requesting-letters-of-recommendation", "video_id": "tDGVAyx-_xQ", "youtube_id": "tDGVAyx-_xQ", "readable_id": "requesting-letters-of-recommendation"}, "erZe85NrsK0": {"duration": 300, "path": "khan/math/pre-algebra/fractions-pre-alg/decomposing-fractions-pre-alg/decomposing-a-mixed-number/", "keywords": "", "id": "erZe85NrsK0", "title": "Decomposing a mixed number", "description": "Decomposing mixed numbers is a pretty straightforward process. It's as simple as adding fractions with like denominators. Watch us do it!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/erZe85NrsK0.mp4/erZe85NrsK0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/erZe85NrsK0.mp4/erZe85NrsK0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/erZe85NrsK0.m3u8/erZe85NrsK0.m3u8"}, "slug": "decomposing-a-mixed-number", "video_id": "erZe85NrsK0", "youtube_id": "erZe85NrsK0", "readable_id": "decomposing-a-mixed-number"}, "IMvBKaeaxco": {"duration": 290, "path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/evidence-that-dna-is-genetic-material-1/", "keywords": "", "id": "IMvBKaeaxco", "title": "Evidence that DNA is genetic material 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IMvBKaeaxco.mp4/IMvBKaeaxco.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IMvBKaeaxco.mp4/IMvBKaeaxco.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IMvBKaeaxco.m3u8/IMvBKaeaxco.m3u8"}, "slug": "evidence-that-dna-is-genetic-material-1", "video_id": "IMvBKaeaxco", "youtube_id": "IMvBKaeaxco", "readable_id": "evidence-that-dna-is-genetic-material-1"}, "ajl1UdtYUCA": {"duration": 841, "path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/geithner-plan-iv/", "keywords": "geithner, timothy, obama, plan, bailout, put, option, TALF, TARP", "id": "ajl1UdtYUCA", "title": "Geithner plan 5", "description": "Quantifying the value of the put option", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ajl1UdtYUCA.mp4/ajl1UdtYUCA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ajl1UdtYUCA.mp4/ajl1UdtYUCA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ajl1UdtYUCA.m3u8/ajl1UdtYUCA.m3u8"}, "slug": "geithner-plan-iv", "video_id": "ajl1UdtYUCA", "youtube_id": "ajl1UdtYUCA", "readable_id": "geithner-plan-iv"}, "opEy6iN9kqc": {"duration": 707, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/more-on-ipos/", "keywords": "ipo, initial, public, offering, equity, stock, market", "id": "opEy6iN9kqc", "title": "More on IPOs", "description": "Public vs. Private Equity. Why people buy equity to begin with.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/opEy6iN9kqc.mp4/opEy6iN9kqc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/opEy6iN9kqc.mp4/opEy6iN9kqc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/opEy6iN9kqc.m3u8/opEy6iN9kqc.m3u8"}, "slug": "more-on-ipos", "video_id": "opEy6iN9kqc", "youtube_id": "opEy6iN9kqc", "readable_id": "more-on-ipos"}, "9b8qZ6OHZ5s": {"duration": 688, "path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/mass-defect-and-binding-energy/", "keywords": "", "id": "9b8qZ6OHZ5s", "title": "Mass defect and binding energy", "description": "Using the mass defect to calculate the energy released when a helium nucleus formed. Introduction to the nuclear strong force.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9b8qZ6OHZ5s.mp4/9b8qZ6OHZ5s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9b8qZ6OHZ5s.mp4/9b8qZ6OHZ5s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9b8qZ6OHZ5s.m3u8/9b8qZ6OHZ5s.m3u8"}, "slug": "mass-defect-and-binding-energy", "video_id": "9b8qZ6OHZ5s", "youtube_id": "9b8qZ6OHZ5s", "readable_id": "mass-defect-and-binding-energy"}, "FkDVucEoJpU": {"duration": 494, "path": "khan/test-prep/mcat/processing-the-environment/emotion/theories-of-emotion/", "keywords": "", "id": "FkDVucEoJpU", "title": "Theories of Emotion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FkDVucEoJpU.mp4/FkDVucEoJpU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FkDVucEoJpU.mp4/FkDVucEoJpU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FkDVucEoJpU.m3u8/FkDVucEoJpU.m3u8"}, "slug": "theories-of-emotion", "video_id": "FkDVucEoJpU", "youtube_id": "FkDVucEoJpU", "readable_id": "theories-of-emotion"}, "OzTqWpAPnrw": {"duration": 605, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-27/", "keywords": "gmat, data, sufficiency, math", "id": "OzTqWpAPnrw", "title": "GMAT: Data sufficiency 27", "description": "112-115, pg. 287", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OzTqWpAPnrw.mp4/OzTqWpAPnrw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OzTqWpAPnrw.mp4/OzTqWpAPnrw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OzTqWpAPnrw.m3u8/OzTqWpAPnrw.m3u8"}, "slug": "gmat-data-sufficiency-27", "video_id": "OzTqWpAPnrw", "youtube_id": "OzTqWpAPnrw", "readable_id": "gmat-data-sufficiency-27"}, "nFSMu3bxXVA": {"duration": 679, "path": "khan/science/physics/torque-angular-momentum/torque-tutorial/angular-momentum/", "keywords": "", "id": "nFSMu3bxXVA", "title": "Angular momentum", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nFSMu3bxXVA.mp4/nFSMu3bxXVA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nFSMu3bxXVA.mp4/nFSMu3bxXVA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nFSMu3bxXVA.m3u8/nFSMu3bxXVA.m3u8"}, "slug": "angular-momentum", "video_id": "nFSMu3bxXVA", "youtube_id": "nFSMu3bxXVA", "readable_id": "angular-momentum"}, "wbAxarp_Ug4": {"duration": 288, "path": "khan/math/pre-algebra/fractions-pre-alg/comparing-fractions-pre-alg/fractions-with-like-denominators-numerators/", "keywords": "", "id": "wbAxarp_Ug4", "title": "Comparing fractions with like numerators and denominators", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wbAxarp_Ug4.mp4/wbAxarp_Ug4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wbAxarp_Ug4.mp4/wbAxarp_Ug4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wbAxarp_Ug4.m3u8/wbAxarp_Ug4.m3u8"}, "slug": "fractions-with-like-denominators-numerators", "video_id": "wbAxarp_Ug4", "youtube_id": "wbAxarp_Ug4", "readable_id": "fractions-with-like-denominators-numerators"}, "suIUUGdNyWk": {"duration": 284, "path": "khan/humanities/renaissance-reformation/mannerism1/parmigianino-madonna-of-the-long-neck-1530-33/", "keywords": "parmigianino, uffizi, smarthistory, art history", "id": "suIUUGdNyWk", "title": "Parmigianino, Madonna of the Long Neck", "description": "Parmigianino, Madonna of the Long Neck, 1530-33, 28 3/4 x 23 1/2\" (73 x 60), Uffizi, Florence Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/suIUUGdNyWk.mp4/suIUUGdNyWk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/suIUUGdNyWk.mp4/suIUUGdNyWk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/suIUUGdNyWk.m3u8/suIUUGdNyWk.m3u8"}, "slug": "parmigianino-madonna-of-the-long-neck-1530-33", "video_id": "suIUUGdNyWk", "youtube_id": "suIUUGdNyWk", "readable_id": "parmigianino-madonna-of-the-long-neck-1530-33"}, "SCM4A0rBeOQ": {"duration": 236, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-call-parity-arbitrage-i/", "keywords": "Put-Call, Parity, Arbitrage", "id": "SCM4A0rBeOQ", "title": "Put-call parity arbitrage I", "description": "Put-Call Parity Arbitrage I", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SCM4A0rBeOQ.mp4/SCM4A0rBeOQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SCM4A0rBeOQ.mp4/SCM4A0rBeOQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SCM4A0rBeOQ.m3u8/SCM4A0rBeOQ.m3u8"}, "slug": "put-call-parity-arbitrage-i", "video_id": "SCM4A0rBeOQ", "youtube_id": "SCM4A0rBeOQ", "readable_id": "put-call-parity-arbitrage-i"}, "6CUcgUeQS-w": {"duration": 176, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/american-put-options/", "keywords": "American, Put, Options", "id": "6CUcgUeQS-w", "title": "American put options", "description": "American Put Options", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6CUcgUeQS-w.mp4/6CUcgUeQS-w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6CUcgUeQS-w.mp4/6CUcgUeQS-w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6CUcgUeQS-w.m3u8/6CUcgUeQS-w.m3u8"}, "slug": "american-put-options", "video_id": "6CUcgUeQS-w", "youtube_id": "6CUcgUeQS-w", "readable_id": "american-put-options"}, "w1dqzlTTm0E": {"duration": 312, "path": "khan/humanities/monarchy-enlightenment/rococo/jean-honor-fragonard-the-progress-of-love-the-meeting-1771-1773/", "keywords": "Jean-Honor\u00e9 Fragonard, Fragonard, Progress of Love, The Meeting, 1771, 1773, Frick Collection, Frick, New York, French, Painting, Rococo, ancien regime, series, art, art history, smarthistory, Khan Academy, Google Art Project, OER", "id": "w1dqzlTTm0E", "title": "Fragonard, The Meeting", "description": "Jean-Honor\u00e9 Fragonard, The Progress of Love: The Meeting, 1771-1773, oil on canvas, 317.5 x 243.8 cm (The Frick Collection, New York)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w1dqzlTTm0E.mp4/w1dqzlTTm0E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w1dqzlTTm0E.mp4/w1dqzlTTm0E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w1dqzlTTm0E.m3u8/w1dqzlTTm0E.m3u8"}, "slug": "jean-honor-fragonard-the-progress-of-love-the-meeting-1771-1773", "video_id": "w1dqzlTTm0E", "youtube_id": "w1dqzlTTm0E", "readable_id": "jean-honor-fragonard-the-progress-of-love-the-meeting-1771-1773"}, "Ovype5DUI04": {"duration": 656, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-polio/polio-vaccinations/", "keywords": "", "id": "Ovype5DUI04", "title": "Polio vaccinations", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ovype5DUI04.mp4/Ovype5DUI04.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ovype5DUI04.mp4/Ovype5DUI04.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ovype5DUI04.m3u8/Ovype5DUI04.m3u8"}, "slug": "polio-vaccinations", "video_id": "Ovype5DUI04", "youtube_id": "Ovype5DUI04", "readable_id": "polio-vaccinations"}, "UXIfzc1UH-g": {"duration": 343, "path": "khan/test-prep/mcat/processing-the-environment/sight/photoreceptor-distribution-fovea/", "keywords": "vision, photoreceptor, fovea", "id": "UXIfzc1UH-g", "title": "Photoreceptor distribution in the fovea", "description": "In this video, I explore how photoreceptors (rods and cones) are distributed in the fovea. By Ronald Sahyouni.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UXIfzc1UH-g.mp4/UXIfzc1UH-g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UXIfzc1UH-g.mp4/UXIfzc1UH-g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UXIfzc1UH-g.m3u8/UXIfzc1UH-g.m3u8"}, "slug": "photoreceptor-distribution-fovea", "video_id": "UXIfzc1UH-g", "youtube_id": "UXIfzc1UH-g", "readable_id": "photoreceptor-distribution-fovea"}, "tu1GPtfsQ7M": {"duration": 794, "path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/linear-algebra-gram-schmidt-process-example/", "keywords": "gram, schmidt, process, basis", "id": "tu1GPtfsQ7M", "title": "Gram-Schmidt process example", "description": "Using Gram-Schmidt to find an orthonormal basis for a plane in R3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tu1GPtfsQ7M.mp4/tu1GPtfsQ7M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tu1GPtfsQ7M.mp4/tu1GPtfsQ7M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tu1GPtfsQ7M.m3u8/tu1GPtfsQ7M.m3u8"}, "slug": "linear-algebra-gram-schmidt-process-example", "video_id": "tu1GPtfsQ7M", "youtube_id": "tu1GPtfsQ7M", "readable_id": "linear-algebra-gram-schmidt-process-example"}, "eXGVAfv08AQ": {"duration": 125, "path": "khan/college-admissions/paying-for-college/financial-aid-packages/appealing-a-financial-aid-package/", "keywords": "", "id": "eXGVAfv08AQ", "title": "Appealing a financial aid package", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eXGVAfv08AQ.mp4/eXGVAfv08AQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eXGVAfv08AQ.mp4/eXGVAfv08AQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eXGVAfv08AQ.m3u8/eXGVAfv08AQ.m3u8"}, "slug": "appealing-a-financial-aid-package", "video_id": "eXGVAfv08AQ", "youtube_id": "eXGVAfv08AQ", "readable_id": "appealing-a-financial-aid-package"}, "51UA1T89MzU": {"duration": 354, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/alexander-mosaic-c-100-b-c-e/", "keywords": "alexander, hellenistic, greek, mosaic, pompeii, roman, issus", "id": "51UA1T89MzU", "title": "Alexander Mosaic from the House of the Faun, Pompeii", "description": "Alexander Mosaic, c. 100 B.C.E., Roman copy (Pompeii) of a lost Greek painting, c. 315 B.C.E., Hellenistic Period (Archaeological Museum, Naples). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/51UA1T89MzU.mp4/51UA1T89MzU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/51UA1T89MzU.mp4/51UA1T89MzU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/51UA1T89MzU.m3u8/51UA1T89MzU.m3u8"}, "slug": "alexander-mosaic-c-100-b-c-e", "video_id": "51UA1T89MzU", "youtube_id": "51UA1T89MzU", "readable_id": "alexander-mosaic-c-100-b-c-e"}, "WJUcZPqgEXU": {"duration": 637, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/transmission-of-hiv/", "keywords": "Transmission,Health (Industry)", "id": "WJUcZPqgEXU", "title": "Transmission of HIV", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WJUcZPqgEXU.mp4/WJUcZPqgEXU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WJUcZPqgEXU.mp4/WJUcZPqgEXU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WJUcZPqgEXU.m3u8/WJUcZPqgEXU.m3u8"}, "slug": "transmission-of-hiv", "video_id": "WJUcZPqgEXU", "youtube_id": "WJUcZPqgEXU", "readable_id": "transmission-of-hiv"}, "xsSLvlonxs4": {"duration": 322, "path": "khan/science/chemistry/oxidation-reduction/cell-potential/voltage-as-an-intensive-property/", "keywords": "", "id": "xsSLvlonxs4", "title": "Voltage as an intensive property", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xsSLvlonxs4.mp4/xsSLvlonxs4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xsSLvlonxs4.mp4/xsSLvlonxs4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xsSLvlonxs4.m3u8/xsSLvlonxs4.m3u8"}, "slug": "voltage-as-an-intensive-property", "video_id": "xsSLvlonxs4", "youtube_id": "xsSLvlonxs4", "readable_id": "voltage-as-an-intensive-property"}, "lA6hE7NFIK0": {"duration": 604, "path": "khan/math/recreational-math/vi-hart/infinity/proof-infinities/", "keywords": "mathematics, numbers, repeating decimals, real numbers, surreal numbers, hyperreal numbers", "id": "lA6hE7NFIK0", "title": "Proof some infinities are bigger than other infinities", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lA6hE7NFIK0.mp4/lA6hE7NFIK0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lA6hE7NFIK0.mp4/lA6hE7NFIK0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lA6hE7NFIK0.m3u8/lA6hE7NFIK0.m3u8"}, "slug": "proof-infinities", "video_id": "lA6hE7NFIK0", "youtube_id": "lA6hE7NFIK0", "readable_id": "proof-infinities"}, "o0XKRK3a3cs": {"duration": 304, "path": "khan/science/discoveries-projects/robots/bit-zee/attaching-bit-zee-s-arduino/", "keywords": "Arduino, microcontroller, connections", "id": "o0XKRK3a3cs", "title": "Arduino connections", "description": "In this video we show you how to connect Bit-zee's Arduino micro-controller to his frame.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o0XKRK3a3cs.mp4/o0XKRK3a3cs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o0XKRK3a3cs.mp4/o0XKRK3a3cs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o0XKRK3a3cs.m3u8/o0XKRK3a3cs.m3u8"}, "slug": "attaching-bit-zee-s-arduino", "video_id": "o0XKRK3a3cs", "youtube_id": "o0XKRK3a3cs", "readable_id": "attaching-bit-zee-s-arduino"}, "Etx366BN34g": {"duration": 164, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/toby-rush-eyeverify/toby-rush-2/", "keywords": "", "id": "Etx366BN34g", "title": "Staying grounded", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Etx366BN34g.mp4/Etx366BN34g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Etx366BN34g.mp4/Etx366BN34g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Etx366BN34g.m3u8/Etx366BN34g.m3u8"}, "slug": "toby-rush-2", "video_id": "Etx366BN34g", "youtube_id": "Etx366BN34g", "readable_id": "toby-rush-2"}, "b76wePnIBdU": {"duration": 311, "path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution/", "keywords": "", "id": "b76wePnIBdU", "title": "u-substitution", "description": "Using u-substitution to find the anti-derivative of a function. Seeing that u-substitution is the inverse of the chain rule.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b76wePnIBdU.mp4/b76wePnIBdU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b76wePnIBdU.mp4/b76wePnIBdU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b76wePnIBdU.m3u8/b76wePnIBdU.m3u8"}, "slug": "u-substitution", "video_id": "b76wePnIBdU", "youtube_id": "b76wePnIBdU", "readable_id": "u-substitution"}, "wQq2xOs2BYU": {"duration": 156, "path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/georgia-o-keeffe-the-lawrence-tree-1929/", "keywords": "Georgia O'Keeffe, The Lawrence Tree, Wadsworth Atheneum, Hartford, 1929, D.H. Lawrence, Kiowa Ranch, O'Keeffe, New Mexico, tree", "id": "wQq2xOs2BYU", "title": "O'Keeffe, The Lawrence Tree", "description": "Georgia O'Keeffe, The Lawrence Tree, 1929, oil on canvas, 31 x 40 inches (Wadsworth Atheneum, Hartford)\n\nPainted in the summer of 1929 while visiting D.H. Lawrence at his Kiowa Ranch during O'Keeffe's first trip to New Mexico, the tree stands in front of the house.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wQq2xOs2BYU.mp4/wQq2xOs2BYU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wQq2xOs2BYU.mp4/wQq2xOs2BYU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wQq2xOs2BYU.m3u8/wQq2xOs2BYU.m3u8"}, "slug": "georgia-o-keeffe-the-lawrence-tree-1929", "video_id": "wQq2xOs2BYU", "youtube_id": "wQq2xOs2BYU", "readable_id": "georgia-o-keeffe-the-lawrence-tree-1929"}, "OPAvXQsPCqQ": {"duration": 366, "path": "khan/test-prep/mcat/chemical-processes/proteins/classification-amino-acids/", "keywords": "", "id": "OPAvXQsPCqQ", "title": "Classification of amino acids", "description": "Amino acids can be classified according to their side chain's chemical properties (the R-group). This video will show you how! By Tracy Kovach.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OPAvXQsPCqQ.mp4/OPAvXQsPCqQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OPAvXQsPCqQ.mp4/OPAvXQsPCqQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OPAvXQsPCqQ.m3u8/OPAvXQsPCqQ.m3u8"}, "slug": "classification-amino-acids", "video_id": "OPAvXQsPCqQ", "youtube_id": "OPAvXQsPCqQ", "readable_id": "classification-amino-acids"}, "884SpJ-22Bc": {"duration": 145, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-4-11/", "keywords": "", "id": "884SpJ-22Bc", "title": "11 Survey results", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/884SpJ-22Bc.mp4/884SpJ-22Bc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/884SpJ-22Bc.mp4/884SpJ-22Bc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/884SpJ-22Bc.m3u8/884SpJ-22Bc.m3u8"}, "slug": "sat-2010-may-4-11", "video_id": "884SpJ-22Bc", "youtube_id": "884SpJ-22Bc", "readable_id": "sat-2010-may-4-11"}, "CLWpkv6ccpA": {"duration": 273, "path": "khan/math/algebra/introduction-to-algebra/manipulating-expressions/combining-like-terms/", "keywords": "", "id": "CLWpkv6ccpA", "title": "Combining like terms introduction", "description": "In simple addition we learned to add all the numbers together to get a sum. In algebra, numbers are sometimes attached to variables and we need to make sure that the variables are alike before we add the numbers.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CLWpkv6ccpA.mp4/CLWpkv6ccpA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CLWpkv6ccpA.mp4/CLWpkv6ccpA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CLWpkv6ccpA.m3u8/CLWpkv6ccpA.m3u8"}, "slug": "combining-like-terms", "video_id": "CLWpkv6ccpA", "youtube_id": "CLWpkv6ccpA", "readable_id": "combining-like-terms"}, "VWlFMfPVmkU": {"duration": 477, "path": "khan/math/algebra-basics/core-algebra-foundations/square-roots-for-college/more-simplifying-radical-expressions/", "keywords": "More, Simplifying, Radical, Expressions", "id": "VWlFMfPVmkU", "title": "Adding and simplifying radicals", "description": "More Simplifying Radical Expressions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VWlFMfPVmkU.mp4/VWlFMfPVmkU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VWlFMfPVmkU.mp4/VWlFMfPVmkU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VWlFMfPVmkU.m3u8/VWlFMfPVmkU.m3u8"}, "slug": "more-simplifying-radical-expressions", "video_id": "VWlFMfPVmkU", "youtube_id": "VWlFMfPVmkU", "readable_id": "more-simplifying-radical-expressions"}, "4kA-IOFwUN4": {"duration": 238, "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/exploring-standard-deviation-1-module/", "keywords": "", "id": "4kA-IOFwUN4", "title": "Exploring standard deviation 1 module", "description": "Ben Eater and Sal Khan talk through the Khan Academy Standard Deviation 1 Module: http://www.khanacademy.org/math/statistics/e/exploring_standard_deviation_1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4kA-IOFwUN4.mp4/4kA-IOFwUN4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4kA-IOFwUN4.mp4/4kA-IOFwUN4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4kA-IOFwUN4.m3u8/4kA-IOFwUN4.m3u8"}, "slug": "exploring-standard-deviation-1-module", "video_id": "4kA-IOFwUN4", "youtube_id": "4kA-IOFwUN4", "readable_id": "exploring-standard-deviation-1-module"}, "tixLZtDnbTg": {"duration": 710, "path": "khan/test-prep/gmat/problem-solving/gmat-math-52/", "keywords": "GMAT, Math, problem, solving", "id": "tixLZtDnbTg", "title": "GMAT: Math 52", "description": "240-244, pgs. 185-186", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tixLZtDnbTg.mp4/tixLZtDnbTg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tixLZtDnbTg.mp4/tixLZtDnbTg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tixLZtDnbTg.m3u8/tixLZtDnbTg.m3u8"}, "slug": "gmat-math-52", "video_id": "tixLZtDnbTg", "youtube_id": "tixLZtDnbTg", "readable_id": "gmat-math-52"}, "Of8ezQj1hRk": {"duration": 155, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/core-algebra-exponent-properties/exponent-properties-3/", "keywords": "u11_l1_t2_we3, Exponent, Properties, CC_6_EE_1, CC_6_EE_2_c, CC_8_EE_1", "id": "Of8ezQj1hRk", "title": "Exponent properties 3", "description": "Exponent Properties 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Of8ezQj1hRk.mp4/Of8ezQj1hRk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Of8ezQj1hRk.mp4/Of8ezQj1hRk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Of8ezQj1hRk.m3u8/Of8ezQj1hRk.m3u8"}, "slug": "exponent-properties-3", "video_id": "Of8ezQj1hRk", "youtube_id": "Of8ezQj1hRk", "readable_id": "exponent-properties-3"}, "WceVwMdN0eE": {"duration": 460, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-egypt-ap/judgement-in-the-presence-of-osiris-hunefer-s-book-of-the-dead/", "keywords": "Hunefer, Osiris, Book of the Dead, 19th Dynasty, New Kingdom, 1275 B.C.E., papyrus, Thebes, Egypt, British Museum, scribe, Anubis, mummification, burial, afterlife, Ma'at, order, ethical judgement, truth, scales, Ammit, Ammut, demon, crocodile, lion, hippopotamus, Thoth, Ibis, Horus, falcon, eye of Horus, Imsety, Duamutef, Hapi, Qebehsenuef, Osiris, Atef, gods, Egyptian, Isis, mummy, Nephthys, Seth", "id": "WceVwMdN0eE", "title": "Last Judgement of Hunefer, from his tomb", "description": "Hunefer's Judgement in the presence of Osiris, Book of the Dead, 19th Dynasty, New Kingdom, c. 1275 B.C.E., papyrus, Thebes, Egypt (British Museum).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WceVwMdN0eE.mp4/WceVwMdN0eE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WceVwMdN0eE.mp4/WceVwMdN0eE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WceVwMdN0eE.m3u8/WceVwMdN0eE.m3u8"}, "slug": "judgement-in-the-presence-of-osiris-hunefer-s-book-of-the-dead", "video_id": "WceVwMdN0eE", "youtube_id": "WceVwMdN0eE", "readable_id": "judgement-in-the-presence-of-osiris-hunefer-s-book-of-the-dead"}, "_lzdhIHLwcQ": {"duration": 147, "path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/ambrogio-lorenzetti-presentation-of-jesus-in-the-temple-1342/", "keywords": "Lorenzetti, Presentation, GAP, Ambrogio Lorenzetti, 1342, tempera, panel, Uffizi, Florence, Siena, Temple, 14th century, fourteenth century, painting, art, Proto-Renaissance, Renaissance, Medieval, Google Art Project, Smarthistory, Khan Academy, OER, Art History", "id": "_lzdhIHLwcQ", "title": "Lorenzetti, Presentation of Jesus in the Temple", "description": "Ambrogio Lorenzetti, Presentation of Jesus in the Temple, 1342, tempera on panel, 257 x 168 cm (Galleria degli Uffizi, Florence)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_lzdhIHLwcQ.mp4/_lzdhIHLwcQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_lzdhIHLwcQ.mp4/_lzdhIHLwcQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_lzdhIHLwcQ.m3u8/_lzdhIHLwcQ.m3u8"}, "slug": "ambrogio-lorenzetti-presentation-of-jesus-in-the-temple-1342", "video_id": "_lzdhIHLwcQ", "youtube_id": "_lzdhIHLwcQ", "readable_id": "ambrogio-lorenzetti-presentation-of-jesus-in-the-temple-1342"}, "-dADFDGte6g": {"duration": 107, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2008-may-4-19/", "keywords": "", "id": "-dADFDGte6g", "title": "19 Function truth", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-dADFDGte6g.mp4/-dADFDGte6g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-dADFDGte6g.mp4/-dADFDGte6g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-dADFDGte6g.m3u8/-dADFDGte6g.m3u8"}, "slug": "sat-2008-may-4-19", "video_id": "-dADFDGte6g", "youtube_id": "-dADFDGte6g", "readable_id": "sat-2008-may-4-19"}, "THJgaznSBu8": {"duration": 448, "path": "khan/test-prep/mcat/processing-the-environment/attention-language/the-spotlight-model-of-attention-and-our-ability-to-multitask/", "keywords": "", "id": "THJgaznSBu8", "title": "The spotlight model of attention and our ability to multitask", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/THJgaznSBu8.mp4/THJgaznSBu8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/THJgaznSBu8.mp4/THJgaznSBu8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/THJgaznSBu8.m3u8/THJgaznSBu8.m3u8"}, "slug": "the-spotlight-model-of-attention-and-our-ability-to-multitask", "video_id": "THJgaznSBu8", "youtube_id": "THJgaznSBu8", "readable_id": "the-spotlight-model-of-attention-and-our-ability-to-multitask"}, "BbqbvSig6Mc": {"duration": 1155, "path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/inverse-laplace-examples/", "keywords": "differential, equations, laplace, transform", "id": "BbqbvSig6Mc", "title": "Inverse Laplace examples", "description": "Using our toolkit to take some inverse Laplace Transforms", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BbqbvSig6Mc.mp4/BbqbvSig6Mc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BbqbvSig6Mc.mp4/BbqbvSig6Mc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BbqbvSig6Mc.m3u8/BbqbvSig6Mc.m3u8"}, "slug": "inverse-laplace-examples", "video_id": "BbqbvSig6Mc", "youtube_id": "BbqbvSig6Mc", "readable_id": "inverse-laplace-examples"}, "0jk6uLZ1Tdc": {"duration": 247, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/arbitraging-futures-contract/", "keywords": "Arbitraging, Futures, Contract", "id": "0jk6uLZ1Tdc", "title": "Arbitraging futures contract", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0jk6uLZ1Tdc.mp4/0jk6uLZ1Tdc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0jk6uLZ1Tdc.mp4/0jk6uLZ1Tdc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0jk6uLZ1Tdc.m3u8/0jk6uLZ1Tdc.m3u8"}, "slug": "arbitraging-futures-contract", "video_id": "0jk6uLZ1Tdc", "youtube_id": "0jk6uLZ1Tdc", "readable_id": "arbitraging-futures-contract"}, "Ws63I3F7Moc": {"duration": 435, "path": "khan/computing/computer-science/informationtheory/moderninfotheory/markov_chains/", "keywords": "markov chains", "id": "Ws63I3F7Moc", "title": "Origin of Markov chains", "description": "Introduction to Markov chains", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ws63I3F7Moc.mp4/Ws63I3F7Moc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ws63I3F7Moc.mp4/Ws63I3F7Moc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ws63I3F7Moc.m3u8/Ws63I3F7Moc.m3u8"}, "slug": "markov_chains", "video_id": "Ws63I3F7Moc", "youtube_id": "Ws63I3F7Moc", "readable_id": "markov_chains"}, "ug2FXcEurOo": {"duration": 193, "path": "khan/test-prep/mcat/social-inequality/social-class/prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige/", "keywords": "", "id": "ug2FXcEurOo", "title": "Prejudice and discrimination based on race, ethnicity, power, social class, and prestige", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ug2FXcEurOo.mp4/ug2FXcEurOo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ug2FXcEurOo.mp4/ug2FXcEurOo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ug2FXcEurOo.m3u8/ug2FXcEurOo.m3u8"}, "slug": "prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige", "video_id": "ug2FXcEurOo", "youtube_id": "ug2FXcEurOo", "readable_id": "prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige"}, "ShzPtU7IOXs": {"duration": 496, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/law-of-demand/", "keywords": "economics, supply, demand", "id": "ShzPtU7IOXs", "title": "Law of demand", "description": "Example of the law of demand", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ShzPtU7IOXs.mp4/ShzPtU7IOXs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ShzPtU7IOXs.mp4/ShzPtU7IOXs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ShzPtU7IOXs.m3u8/ShzPtU7IOXs.m3u8"}, "slug": "law-of-demand", "video_id": "ShzPtU7IOXs", "youtube_id": "ShzPtU7IOXs", "readable_id": "law-of-demand"}, "OP91XWBRI1w": {"duration": 461, "path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/quadratic-inequality-example/", "keywords": "", "id": "OP91XWBRI1w", "title": "Quadratic inequality example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OP91XWBRI1w.mp4/OP91XWBRI1w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OP91XWBRI1w.mp4/OP91XWBRI1w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OP91XWBRI1w.m3u8/OP91XWBRI1w.m3u8"}, "slug": "quadratic-inequality-example", "video_id": "OP91XWBRI1w", "youtube_id": "OP91XWBRI1w", "readable_id": "quadratic-inequality-example"}, "EK-h6cZCXrs": {"duration": 244, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/ruysch-flowers-insects/", "keywords": "Ruysch, Still Life, Flowers, Insects, Baroque, Dutch, painting, Netherlands", "id": "EK-h6cZCXrs", "title": "Rachel Ruysch, Fruit and Insects", "description": "Rachel Ruysch, Fruit and Insects, 1711, oil on wood, 44 x 60 cm (Galleria degli Uffizi, Florence); speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EK-h6cZCXrs.mp4/EK-h6cZCXrs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EK-h6cZCXrs.mp4/EK-h6cZCXrs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EK-h6cZCXrs.m3u8/EK-h6cZCXrs.m3u8"}, "slug": "ruysch-flowers-insects", "video_id": "EK-h6cZCXrs", "youtube_id": "EK-h6cZCXrs", "readable_id": "ruysch-flowers-insects"}, "5OYIXxNz6Xk": {"duration": 146, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-1-working-at-convenience-store/", "keywords": "", "id": "5OYIXxNz6Xk", "title": "1 Working at convenience store", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5OYIXxNz6Xk.mp4/5OYIXxNz6Xk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5OYIXxNz6Xk.mp4/5OYIXxNz6Xk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5OYIXxNz6Xk.m3u8/5OYIXxNz6Xk.m3u8"}, "slug": "sat-1-working-at-convenience-store", "video_id": "5OYIXxNz6Xk", "youtube_id": "5OYIXxNz6Xk", "readable_id": "sat-1-working-at-convenience-store"}, "5mNTvtjDnP8": {"duration": 593, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial/chronometric-revolution/", "keywords": "Chronometric, Revolution", "id": "5mNTvtjDnP8", "title": "Chronometric revolution", "description": "Discussion of the relatively recent changes in our ability as a species to shine light on our deep past", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5mNTvtjDnP8.mp4/5mNTvtjDnP8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5mNTvtjDnP8.mp4/5mNTvtjDnP8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5mNTvtjDnP8.m3u8/5mNTvtjDnP8.m3u8"}, "slug": "chronometric-revolution", "video_id": "5mNTvtjDnP8", "youtube_id": "5mNTvtjDnP8", "readable_id": "chronometric-revolution"}, "w2BN2AJ4fOI": {"duration": 167, "path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/comparing-features-of-functions-2-example-1/", "keywords": "", "id": "w2BN2AJ4fOI", "title": "Comparing features of functions (example 1)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w2BN2AJ4fOI.mp4/w2BN2AJ4fOI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w2BN2AJ4fOI.mp4/w2BN2AJ4fOI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w2BN2AJ4fOI.m3u8/w2BN2AJ4fOI.m3u8"}, "slug": "comparing-features-of-functions-2-example-1", "video_id": "w2BN2AJ4fOI", "youtube_id": "w2BN2AJ4fOI", "readable_id": "comparing-features-of-functions-2-example-1"}, "vJyvTChDzeg": {"duration": 61, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-4-2/", "keywords": "", "id": "vJyvTChDzeg", "title": "2 Sequence of numbers", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vJyvTChDzeg.mp4/vJyvTChDzeg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vJyvTChDzeg.mp4/vJyvTChDzeg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vJyvTChDzeg.m3u8/vJyvTChDzeg.m3u8"}, "slug": "sat-2008-may-4-2", "video_id": "vJyvTChDzeg", "youtube_id": "vJyvTChDzeg", "readable_id": "sat-2008-may-4-2"}, "YclQE2XtaLw": {"duration": 605, "path": "khan/math/probability/statistics-inferential/margin-of-error/margin-of-error-2/", "keywords": "margin, of, error, confindence, interval, sampling, distribution, sample, mean, standard, deviation, CC_7_SP_1, CC_7_SP_2", "id": "YclQE2XtaLw", "title": "Margin of error 2", "description": "Finding the 95% confidence interval for the proportion of a population voting for a candidate.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YclQE2XtaLw.mp4/YclQE2XtaLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YclQE2XtaLw.mp4/YclQE2XtaLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YclQE2XtaLw.m3u8/YclQE2XtaLw.m3u8"}, "slug": "margin-of-error-2", "video_id": "YclQE2XtaLw", "youtube_id": "YclQE2XtaLw", "readable_id": "margin-of-error-2"}, "1mjyq51ppT8": {"duration": 306, "path": "khan/computing/computer-science/cryptography/random-algorithms-probability/random-primality-test-prime-adventure-part-9/", "keywords": "", "id": "1mjyq51ppT8", "title": "Random primality test (warm up)", "description": "Introduction to random primality tests & how they will work (warm up).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1mjyq51ppT8.mp4/1mjyq51ppT8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1mjyq51ppT8.mp4/1mjyq51ppT8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1mjyq51ppT8.m3u8/1mjyq51ppT8.m3u8"}, "slug": "random-primality-test-prime-adventure-part-9", "video_id": "1mjyq51ppT8", "youtube_id": "1mjyq51ppT8", "readable_id": "random-primality-test-prime-adventure-part-9"}, "lA3sjWwu5-s": {"duration": 393, "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/financial-crisis-in-thailand-caused-by-speculative-attack/", "keywords": "thailand, macroeconomics, currency", "id": "lA3sjWwu5-s", "title": "Financial crisis in Thailand caused by speculative attack", "description": "How a currency crisis in Thailand led to a banking crisis in the 1990s", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lA3sjWwu5-s.mp4/lA3sjWwu5-s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lA3sjWwu5-s.mp4/lA3sjWwu5-s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lA3sjWwu5-s.m3u8/lA3sjWwu5-s.m3u8"}, "slug": "financial-crisis-in-thailand-caused-by-speculative-attack", "video_id": "lA3sjWwu5-s", "youtube_id": "lA3sjWwu5-s", "readable_id": "financial-crisis-in-thailand-caused-by-speculative-attack"}, "oXowkdgJPO4": {"duration": 723, "path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/thin-film-interference-part-1/", "keywords": "", "id": "oXowkdgJPO4", "title": "Thin Film Interference part 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oXowkdgJPO4.mp4/oXowkdgJPO4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oXowkdgJPO4.mp4/oXowkdgJPO4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oXowkdgJPO4.m3u8/oXowkdgJPO4.m3u8"}, "slug": "thin-film-interference-part-1", "video_id": "oXowkdgJPO4", "youtube_id": "oXowkdgJPO4", "readable_id": "thin-film-interference-part-1"}, "7GV1UZSTNJg": {"duration": 777, "path": "khan/test-prep/mcat/physical-processes/thin-lenses/thin-lens-equation-and-problem-solving/", "keywords": "", "id": "7GV1UZSTNJg", "title": "Thin lens equation and problem solving", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7GV1UZSTNJg.mp4/7GV1UZSTNJg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7GV1UZSTNJg.mp4/7GV1UZSTNJg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7GV1UZSTNJg.m3u8/7GV1UZSTNJg.m3u8"}, "slug": "thin-lens-equation-and-problem-solving", "video_id": "7GV1UZSTNJg", "youtube_id": "7GV1UZSTNJg", "readable_id": "thin-lens-equation-and-problem-solving"}, "65y1SKgRtOc": {"duration": 505, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-bronchiolitis/what-is-bronchiolitis/", "keywords": "", "id": "65y1SKgRtOc", "title": "What is bronchiolitis?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/65y1SKgRtOc.mp4/65y1SKgRtOc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/65y1SKgRtOc.mp4/65y1SKgRtOc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/65y1SKgRtOc.m3u8/65y1SKgRtOc.m3u8"}, "slug": "what-is-bronchiolitis", "video_id": "65y1SKgRtOc", "youtube_id": "65y1SKgRtOc", "readable_id": "what-is-bronchiolitis"}, "aIjzkiijGnA": {"duration": 483, "path": "khan/math/precalculus/seq_induction/geometric-sequence-series/geometric-series-word-problem/", "keywords": "", "id": "aIjzkiijGnA", "title": "Constructing a geometric series for new users", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aIjzkiijGnA.mp4/aIjzkiijGnA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aIjzkiijGnA.mp4/aIjzkiijGnA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aIjzkiijGnA.m3u8/aIjzkiijGnA.m3u8"}, "slug": "geometric-series-word-problem", "video_id": "aIjzkiijGnA", "youtube_id": "aIjzkiijGnA", "readable_id": "geometric-series-word-problem"}, "o0arqcKC7QE": {"duration": 202, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-number-add-sub-pre-alg/adding-mixed-numbers-word-problem/", "keywords": "U02_L3_T1_we5, Adding, Mixed, Numbers, Word, Problem, CC_4_MD_2, CC_4_NF_3_b, CC_4_NF_3_d, CC_5_NF_1, CC_5_NF_2", "id": "o0arqcKC7QE", "title": "Adding mixed numbers word problem", "description": "Adding Mixed Numbers Word Problem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o0arqcKC7QE.mp4/o0arqcKC7QE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o0arqcKC7QE.mp4/o0arqcKC7QE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o0arqcKC7QE.m3u8/o0arqcKC7QE.m3u8"}, "slug": "adding-mixed-numbers-word-problem", "video_id": "o0arqcKC7QE", "youtube_id": "o0arqcKC7QE", "readable_id": "adding-mixed-numbers-word-problem"}, "OS4Q5TN8oJU": {"duration": 286, "path": "khan/test-prep/ap-art-history/africa-ap/fang-reliquary/", "keywords": "Fang,Reliquary figure,Gabon (Country),Africa (Continent),African art,art,Sculpture (Visual Art Form),reliquary,wood,Eyema-o-Byeri,Brooklyn Museum (Museum)", "id": "OS4Q5TN8oJU", "title": "Fang Reliquary Figure", "description": "Reliquary Guardian Figure (Eyema-o-Byeri), Gabon, Fang peoples, mid 18th to mid 19th century, wood and iron, 58.4 cm high (Brooklyn Museum) Speakers: Dr. Peri Klemm and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OS4Q5TN8oJU.mp4/OS4Q5TN8oJU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OS4Q5TN8oJU.mp4/OS4Q5TN8oJU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OS4Q5TN8oJU.m3u8/OS4Q5TN8oJU.m3u8"}, "slug": "fang-reliquary", "video_id": "OS4Q5TN8oJU", "youtube_id": "OS4Q5TN8oJU", "readable_id": "fang-reliquary"}, "-nlMXVrgtjw": {"duration": 420, "path": "khan/math/algebra2/arithmetic-with-polynomials/synthetic-division-of-polynomials/why-synthetic-division-works/", "keywords": "algebra, synthetic, division", "id": "-nlMXVrgtjw", "title": "Why synthetic division works", "description": "Sal explains why synthetic division gives you the same result as traditional algebraic long division.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-nlMXVrgtjw.mp4/-nlMXVrgtjw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-nlMXVrgtjw.mp4/-nlMXVrgtjw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-nlMXVrgtjw.m3u8/-nlMXVrgtjw.m3u8"}, "slug": "why-synthetic-division-works", "video_id": "-nlMXVrgtjw", "youtube_id": "-nlMXVrgtjw", "readable_id": "why-synthetic-division-works"}, "7HTy-6NLWGM": {"duration": 680, "path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/aldosterone-removes-acid-from-the-blood/", "keywords": "", "id": "7HTy-6NLWGM", "title": "Aldosterone removes acid from the blood", "description": "See how Aldosterone acts on the alpha-intercalated cell to remove protons (acid) from the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7HTy-6NLWGM.mp4/7HTy-6NLWGM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7HTy-6NLWGM.mp4/7HTy-6NLWGM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7HTy-6NLWGM.m3u8/7HTy-6NLWGM.m3u8"}, "slug": "aldosterone-removes-acid-from-the-blood", "video_id": "7HTy-6NLWGM", "youtube_id": "7HTy-6NLWGM", "readable_id": "aldosterone-removes-acid-from-the-blood"}, "5EU-y1VF7g4": {"duration": 1109, "path": "khan/science/chemistry/thermodynamics-chemistry/internal-energy-sal/macrostates-and-microstates/", "keywords": "thermodynamics, equilibrium, macrostate", "id": "5EU-y1VF7g4", "title": "Macrostates and microstates", "description": "The difference between macrostates and microstates. Thermodynamic equilibrium.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5EU-y1VF7g4.mp4/5EU-y1VF7g4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5EU-y1VF7g4.mp4/5EU-y1VF7g4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5EU-y1VF7g4.m3u8/5EU-y1VF7g4.m3u8"}, "slug": "macrostates-and-microstates", "video_id": "5EU-y1VF7g4", "youtube_id": "5EU-y1VF7g4", "readable_id": "macrostates-and-microstates"}, "_YxzwkCv0Ik": {"duration": 276, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-14/", "keywords": "", "id": "_YxzwkCv0Ik", "title": "14 Trays with cups and plates", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_YxzwkCv0Ik.mp4/_YxzwkCv0Ik.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_YxzwkCv0Ik.mp4/_YxzwkCv0Ik.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_YxzwkCv0Ik.m3u8/_YxzwkCv0Ik.m3u8"}, "slug": "2013-sat-practice-6-14", "video_id": "_YxzwkCv0Ik", "youtube_id": "_YxzwkCv0Ik", "readable_id": "2013-sat-practice-6-14"}, "qfqbomqKZqY": {"duration": 731, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/ravel/ravel-suite2/", "keywords": "", "id": "qfqbomqKZqY", "title": "Maurice Ravel: Daphnis et Chloe\u0301, analysis by Gerard Schwarz", "description": "Watch full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qfqbomqKZqY.mp4/qfqbomqKZqY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qfqbomqKZqY.mp4/qfqbomqKZqY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qfqbomqKZqY.m3u8/qfqbomqKZqY.m3u8"}, "slug": "ravel-suite2", "video_id": "qfqbomqKZqY", "youtube_id": "qfqbomqKZqY", "readable_id": "ravel-suite2"}, "Lzr9GGjh6YQ": {"duration": 585, "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/colon-rectum-anus/", "keywords": "MCAT", "id": "Lzr9GGjh6YQ", "title": "Colon, rectum, and anus", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Lzr9GGjh6YQ.mp4/Lzr9GGjh6YQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Lzr9GGjh6YQ.mp4/Lzr9GGjh6YQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Lzr9GGjh6YQ.m3u8/Lzr9GGjh6YQ.m3u8"}, "slug": "colon-rectum-anus", "video_id": "Lzr9GGjh6YQ", "youtube_id": "Lzr9GGjh6YQ", "readable_id": "colon-rectum-anus"}, "WihqEIIFQMk": {"duration": 129, "path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/biodiveristy-hotspot-case-study-galapagos/", "keywords": "", "id": "WihqEIIFQMk", "title": "Biodiversity hotspot case study: Galapagos", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WihqEIIFQMk.mp4/WihqEIIFQMk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WihqEIIFQMk.mp4/WihqEIIFQMk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WihqEIIFQMk.m3u8/WihqEIIFQMk.m3u8"}, "slug": "biodiveristy-hotspot-case-study-galapagos", "video_id": "WihqEIIFQMk", "youtube_id": "WihqEIIFQMk", "readable_id": "biodiveristy-hotspot-case-study-galapagos"}, "XGpEHj43kcc": {"duration": 434, "path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/cosine-angle-addition-2/", "keywords": "", "id": "XGpEHj43kcc", "title": "Another example using angle addition formula with cosine", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XGpEHj43kcc.mp4/XGpEHj43kcc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XGpEHj43kcc.mp4/XGpEHj43kcc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XGpEHj43kcc.m3u8/XGpEHj43kcc.m3u8"}, "slug": "cosine-angle-addition-2", "video_id": "XGpEHj43kcc", "youtube_id": "XGpEHj43kcc", "readable_id": "cosine-angle-addition-2"}, "3KrqQXsWP1M": {"duration": 515, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/hydroboration-oxidation-of-alkynes/", "keywords": "", "id": "3KrqQXsWP1M", "title": "Hydroboration-oxidation of alkynes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3KrqQXsWP1M.mp4/3KrqQXsWP1M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3KrqQXsWP1M.mp4/3KrqQXsWP1M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3KrqQXsWP1M.m3u8/3KrqQXsWP1M.m3u8"}, "slug": "hydroboration-oxidation-of-alkynes", "video_id": "3KrqQXsWP1M", "youtube_id": "3KrqQXsWP1M", "readable_id": "hydroboration-oxidation-of-alkynes"}, "4xFIi0JF2AM": {"duration": 438, "path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-rule-of-sarrus-of-determinants/", "keywords": "determinant, sarrus", "id": "4xFIi0JF2AM", "title": "Rule of Sarrus of determinants", "description": "A alternative \"short cut\" for calculating 3x3 determinants (Rule of Sarrus)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4xFIi0JF2AM.mp4/4xFIi0JF2AM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4xFIi0JF2AM.mp4/4xFIi0JF2AM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4xFIi0JF2AM.m3u8/4xFIi0JF2AM.m3u8"}, "slug": "linear-algebra-rule-of-sarrus-of-determinants", "video_id": "4xFIi0JF2AM", "youtube_id": "4xFIi0JF2AM", "readable_id": "linear-algebra-rule-of-sarrus-of-determinants"}, "tdwFdzVqito": {"duration": 1154, "path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/dot-and-cross-product-comparison-intuition/", "keywords": "cross, dot, product", "id": "tdwFdzVqito", "title": "Dot and cross product comparison/intuition", "description": "Dot and Cross Product Comparison/Intuition", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tdwFdzVqito.mp4/tdwFdzVqito.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tdwFdzVqito.mp4/tdwFdzVqito.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tdwFdzVqito.m3u8/tdwFdzVqito.m3u8"}, "slug": "dot-and-cross-product-comparison-intuition", "video_id": "tdwFdzVqito", "youtube_id": "tdwFdzVqito", "readable_id": "dot-and-cross-product-comparison-intuition"}, "IelS2vg7JO8": {"duration": 155, "path": "khan/math/geometry/basic-geometry/volume_tutorial/volume-of-a-sphere/", "keywords": "u07_l3_t1_we2, Volume, of, Sphere", "id": "IelS2vg7JO8", "title": "Volume of a sphere", "description": "Volume of a Sphere", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IelS2vg7JO8.mp4/IelS2vg7JO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IelS2vg7JO8.mp4/IelS2vg7JO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IelS2vg7JO8.m3u8/IelS2vg7JO8.m3u8"}, "slug": "volume-of-a-sphere", "video_id": "IelS2vg7JO8", "youtube_id": "IelS2vg7JO8", "readable_id": "volume-of-a-sphere"}, "HEH_oKNLgUU": {"duration": 665, "path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/calculus-derivatives-2-5-new-hd-version/", "keywords": "calculus, derivative", "id": "HEH_oKNLgUU", "title": "The derivative of f(x)=x^2 for any x", "description": "Calculus-Derivative: Finding the derivative of y=x^2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HEH_oKNLgUU.mp4/HEH_oKNLgUU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HEH_oKNLgUU.mp4/HEH_oKNLgUU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HEH_oKNLgUU.m3u8/HEH_oKNLgUU.m3u8"}, "slug": "calculus-derivatives-2-5-new-hd-version", "video_id": "HEH_oKNLgUU", "youtube_id": "HEH_oKNLgUU", "readable_id": "calculus-derivatives-2-5-new-hd-version"}, "4SQDybFjhRE": {"duration": 365, "path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/loop-de-loop-answer-part-1/", "keywords": "centripetal, acceleration, force", "id": "4SQDybFjhRE", "title": "Loop de loop answer part 1", "description": "Figuring out the minimum speed at the top of the loop de loop to stay on the track", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4SQDybFjhRE.mp4/4SQDybFjhRE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4SQDybFjhRE.mp4/4SQDybFjhRE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4SQDybFjhRE.m3u8/4SQDybFjhRE.m3u8"}, "slug": "loop-de-loop-answer-part-1", "video_id": "4SQDybFjhRE", "youtube_id": "4SQDybFjhRE", "readable_id": "loop-de-loop-answer-part-1"}, "ayKHmN90ncc": {"duration": 344, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic/naming-cubane/", "keywords": "", "id": "ayKHmN90ncc", "title": "Naming cubane", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ayKHmN90ncc.mp4/ayKHmN90ncc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ayKHmN90ncc.mp4/ayKHmN90ncc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ayKHmN90ncc.m3u8/ayKHmN90ncc.m3u8"}, "slug": "naming-cubane", "video_id": "ayKHmN90ncc", "youtube_id": "ayKHmN90ncc", "readable_id": "naming-cubane"}, "TLU9Hdt14Kc": {"duration": 183, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/bottle-rocket-apps/calvin-carter-3/", "keywords": "", "id": "TLU9Hdt14Kc", "title": "The excitement of making something", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TLU9Hdt14Kc.mp4/TLU9Hdt14Kc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TLU9Hdt14Kc.mp4/TLU9Hdt14Kc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TLU9Hdt14Kc.m3u8/TLU9Hdt14Kc.m3u8"}, "slug": "calvin-carter-3", "video_id": "TLU9Hdt14Kc", "youtube_id": "TLU9Hdt14Kc", "readable_id": "calvin-carter-3"}, "QE2uR6Z-NcU": {"duration": 643, "path": "khan/math/precalculus/prob_comb/addition_rule_prob_precalc/addition-rule-for-probability/", "keywords": "probability, statistics, venn", "id": "QE2uR6Z-NcU", "title": "Addition rule for probability", "description": "Venn diagrams and the addition rule for probability", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QE2uR6Z-NcU.mp4/QE2uR6Z-NcU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QE2uR6Z-NcU.mp4/QE2uR6Z-NcU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QE2uR6Z-NcU.m3u8/QE2uR6Z-NcU.m3u8"}, "slug": "addition-rule-for-probability", "video_id": "QE2uR6Z-NcU", "youtube_id": "QE2uR6Z-NcU", "readable_id": "addition-rule-for-probability"}, "wbO4sKeyXYI": {"duration": 148, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q6-easier/", "keywords": "", "id": "wbO4sKeyXYI", "title": "Linear and exponential growth \u2014 Basic example", "description": "Watch Sal work through a basic Linear and exponential growth problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wbO4sKeyXYI.mp4/wbO4sKeyXYI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wbO4sKeyXYI.mp4/wbO4sKeyXYI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wbO4sKeyXYI.m3u8/wbO4sKeyXYI.m3u8"}, "slug": "sat-math-q6-easier", "video_id": "wbO4sKeyXYI", "youtube_id": "wbO4sKeyXYI", "readable_id": "sat-math-q6-easier"}, "35sOcVflhE0": {"duration": 860, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments/bass-interview-and-demonstration-with-principal-alexander-hanna/", "keywords": "", "id": "35sOcVflhE0", "title": "Bass: Interview and demonstration with principal Alexander Hanna", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/35sOcVflhE0.mp4/35sOcVflhE0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/35sOcVflhE0.mp4/35sOcVflhE0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/35sOcVflhE0.m3u8/35sOcVflhE0.m3u8"}, "slug": "bass-interview-and-demonstration-with-principal-alexander-hanna", "video_id": "35sOcVflhE0", "youtube_id": "35sOcVflhE0", "readable_id": "bass-interview-and-demonstration-with-principal-alexander-hanna"}, "WDdF9ArqklA": {"duration": 513, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/preventing-an-hiv-infection/", "keywords": "Infection (Disease Or Medical Condition),AIDS (Disease Or Medical Condition),Health (Industry)", "id": "WDdF9ArqklA", "title": "Preventing an HIV infection", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WDdF9ArqklA.mp4/WDdF9ArqklA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WDdF9ArqklA.mp4/WDdF9ArqklA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WDdF9ArqklA.m3u8/WDdF9ArqklA.m3u8"}, "slug": "preventing-an-hiv-infection", "video_id": "WDdF9ArqklA", "youtube_id": "WDdF9ArqklA", "readable_id": "preventing-an-hiv-infection"}, "qfz1k_yU3d4": {"duration": 336, "path": "khan/humanities/art-americas/early-cultures/olmec/kunz-axe/", "keywords": "Olmec, Mesoamerican, Jadeite, sculpture", "id": "qfz1k_yU3d4", "title": "Kunz Axe", "description": "Votive Adze \"Kunz Axe,\" (Olmec Formative Period), c. 1200-500 B.C.E., jadeite, 31 x 16 x 11 cm (American Museum of Natural History) Speakers: Dr. Rex Koonz and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qfz1k_yU3d4.mp4/qfz1k_yU3d4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qfz1k_yU3d4.mp4/qfz1k_yU3d4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qfz1k_yU3d4.m3u8/qfz1k_yU3d4.m3u8"}, "slug": "kunz-axe", "video_id": "qfz1k_yU3d4", "youtube_id": "qfz1k_yU3d4", "readable_id": "kunz-axe"}, "0t8W4JFpP2M": {"duration": 330, "path": "khan/math/precalculus/vectors-precalc/magnitude-direction/mag-vec-sums/", "keywords": "", "id": "0t8W4JFpP2M", "title": "Magnitude of vector sums", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0t8W4JFpP2M.mp4/0t8W4JFpP2M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0t8W4JFpP2M.mp4/0t8W4JFpP2M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0t8W4JFpP2M.m3u8/0t8W4JFpP2M.m3u8"}, "slug": "mag-vec-sums", "video_id": "0t8W4JFpP2M", "youtube_id": "0t8W4JFpP2M", "readable_id": "mag-vec-sums"}, "zXyQI4lD4wI": {"duration": 184, "path": "khan/math/algebra/algebra-functions/maximum-and-minimum-points/identifying-relative-and-absolute-maxima-and-minima/", "keywords": "", "id": "zXyQI4lD4wI", "title": "How to recognize relative and absolute maxima and minima (example)", "description": "Sal gives multiple examples where he identifies relative maximum points, relative minimum points, absolute maximum points, and absolute\u00a0minimum points.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zXyQI4lD4wI.mp4/zXyQI4lD4wI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zXyQI4lD4wI.mp4/zXyQI4lD4wI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zXyQI4lD4wI.m3u8/zXyQI4lD4wI.m3u8"}, "slug": "identifying-relative-and-absolute-maxima-and-minima", "video_id": "zXyQI4lD4wI", "youtube_id": "zXyQI4lD4wI", "readable_id": "identifying-relative-and-absolute-maxima-and-minima"}, "ALhv3Rlydig": {"duration": 332, "path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/acute-right-and-obtuse-angles/", "keywords": "angles, geometry, CC_4_G_1", "id": "ALhv3Rlydig", "title": "Acute right and obtuse angles", "description": "We briefly discussed the types of angles in the last tutorial but we'll delve a little deeper into acute, obtuse, and right angles here.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ALhv3Rlydig.mp4/ALhv3Rlydig.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ALhv3Rlydig.mp4/ALhv3Rlydig.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ALhv3Rlydig.m3u8/ALhv3Rlydig.m3u8"}, "slug": "acute-right-and-obtuse-angles", "video_id": "ALhv3Rlydig", "youtube_id": "ALhv3Rlydig", "readable_id": "acute-right-and-obtuse-angles"}, "E5f5smh7Keo": {"duration": 575, "path": "khan/partner-content/wi-phi/the-history-of-philosophy/epicurus-cure-for-unhappiness/", "keywords": "", "id": "E5f5smh7Keo", "title": "Ancient: Epicurus\u2019 Cure for Unhappiness", "description": "In this video,\u00a0Monte\u00a0discusses the \u201ctetrapharmakos\u201d or \u201cfour-part remedy\u201d developed by the ancient Greek philosopher Epicurus (341-270 BC) and his followers to treat unhappiness and anxiety. The tetrapharmakos consists of four maxims which encapsulate the Epicurean outlook on god, life, death, pleasure, and pain. The maxims can be meditated upon in order to alleviate worries and concerns that continue to plague us as much as they did the ancients.\n\nSpeaker: Dr. Monte Ransome Johnson, Associate Professor, University of California, San Diego", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E5f5smh7Keo.mp4/E5f5smh7Keo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E5f5smh7Keo.mp4/E5f5smh7Keo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E5f5smh7Keo.m3u8/E5f5smh7Keo.m3u8"}, "slug": "epicurus-cure-for-unhappiness", "video_id": "E5f5smh7Keo", "youtube_id": "E5f5smh7Keo", "readable_id": "epicurus-cure-for-unhappiness"}, "b6VQv76BQDs": {"duration": 134, "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/correction-radius-of-observable-universe/", "keywords": "Radius, of, Observable, Universe", "id": "b6VQv76BQDs", "title": "Radius of observable universe (correction)", "description": "(Correction) Radius of Observable Universe", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b6VQv76BQDs.mp4/b6VQv76BQDs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b6VQv76BQDs.mp4/b6VQv76BQDs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b6VQv76BQDs.m3u8/b6VQv76BQDs.m3u8"}, "slug": "correction-radius-of-observable-universe", "video_id": "b6VQv76BQDs", "youtube_id": "b6VQv76BQDs", "readable_id": "correction-radius-of-observable-universe"}, "qrVvpYt3Vl0": {"duration": 141, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/reading_data/reading-pictographs/", "keywords": "u08_l1_t1_we1, Reading, Pictographs", "id": "qrVvpYt3Vl0", "title": "Reading pictographs", "description": "Common sense tells you that a pictograph must be some kind of....picture. Yes! A pictograph is basically a way to represent data with pictures that relate to the data. Let's look at this word problem that asks to interpret a pictograph.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qrVvpYt3Vl0.mp4/qrVvpYt3Vl0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qrVvpYt3Vl0.mp4/qrVvpYt3Vl0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qrVvpYt3Vl0.m3u8/qrVvpYt3Vl0.m3u8"}, "slug": "reading-pictographs", "video_id": "qrVvpYt3Vl0", "youtube_id": "qrVvpYt3Vl0", "readable_id": "reading-pictographs"}, "mQyM-4YqHMM": {"duration": 549, "path": "khan/humanities/history/euro-hist/other-fronts-ww1/italian-front-in-world-war-i/", "keywords": "", "id": "mQyM-4YqHMM", "title": "Italian front in World War I", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mQyM-4YqHMM.mp4/mQyM-4YqHMM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mQyM-4YqHMM.mp4/mQyM-4YqHMM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mQyM-4YqHMM.m3u8/mQyM-4YqHMM.m3u8"}, "slug": "italian-front-in-world-war-i", "video_id": "mQyM-4YqHMM", "youtube_id": "mQyM-4YqHMM", "readable_id": "italian-front-in-world-war-i"}, "blur0MemUQA": {"duration": 869, "path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/wave-interference/", "keywords": "", "id": "blur0MemUQA", "title": "Wave Interference", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/blur0MemUQA.mp4/blur0MemUQA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/blur0MemUQA.mp4/blur0MemUQA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/blur0MemUQA.m3u8/blur0MemUQA.m3u8"}, "slug": "wave-interference", "video_id": "blur0MemUQA", "youtube_id": "blur0MemUQA", "readable_id": "wave-interference"}, "pQwoBOpVoWw": {"duration": 446, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-complex-numbers-part-2/", "keywords": "2010, IIT, JEE, Paper, Problem, 39, Complex, Numbers, (part, 2)", "id": "pQwoBOpVoWw", "title": "IIT JEE complex numbers (part 2)", "description": "2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 2)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pQwoBOpVoWw.mp4/pQwoBOpVoWw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pQwoBOpVoWw.mp4/pQwoBOpVoWw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pQwoBOpVoWw.m3u8/pQwoBOpVoWw.m3u8"}, "slug": "iit-jee-complex-numbers-part-2", "video_id": "pQwoBOpVoWw", "youtube_id": "pQwoBOpVoWw", "readable_id": "iit-jee-complex-numbers-part-2"}, "P-1mWGeJjmg": {"duration": 601, "path": "khan/test-prep/mcat/physical-processes/capacitors/capacitors-parallel/", "keywords": "capacitor, parallel, circuit", "id": "P-1mWGeJjmg", "title": "Capacitors in parallel", "description": "The effect on voltage and current when capacitors are constructed in parallel in a circuit. By David Santo Pietro.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P-1mWGeJjmg.mp4/P-1mWGeJjmg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P-1mWGeJjmg.mp4/P-1mWGeJjmg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P-1mWGeJjmg.m3u8/P-1mWGeJjmg.m3u8"}, "slug": "capacitors-parallel", "video_id": "P-1mWGeJjmg", "youtube_id": "P-1mWGeJjmg", "readable_id": "capacitors-parallel"}, "_DNM039pUXE": {"duration": 550, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions/tonsillitis/", "keywords": "", "id": "_DNM039pUXE", "title": "Tonsillitis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_DNM039pUXE.mp4/_DNM039pUXE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_DNM039pUXE.mp4/_DNM039pUXE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_DNM039pUXE.m3u8/_DNM039pUXE.m3u8"}, "slug": "tonsillitis", "video_id": "_DNM039pUXE", "youtube_id": "_DNM039pUXE", "readable_id": "tonsillitis"}, "lCRGNykWqFI": {"duration": 800, "path": "khan/math/linear-algebra/alternate_bases/change_of_basis/lin-alg-alternate-basis-tranformation-matrix-example/", "keywords": "basis, coordinates, transformation, matrix", "id": "lCRGNykWqFI", "title": "Alternate basis transformation matrix example", "description": "Example of finding the transformation matrix for an alternate basis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lCRGNykWqFI.mp4/lCRGNykWqFI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lCRGNykWqFI.mp4/lCRGNykWqFI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lCRGNykWqFI.m3u8/lCRGNykWqFI.m3u8"}, "slug": "lin-alg-alternate-basis-tranformation-matrix-example", "video_id": "lCRGNykWqFI", "youtube_id": "lCRGNykWqFI", "readable_id": "lin-alg-alternate-basis-tranformation-matrix-example"}, "y1_N1GAsS5I": {"duration": 185, "path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/andrea-mantegna-saint-sebastian-c-1456-59/", "keywords": "Mantegna, Renaissance, St. Sebastian, Art History, Smarthistory", "id": "y1_N1GAsS5I", "title": "Mantegna, Saint Sebastian", "description": "Andrea Mantegna, Saint Sebastian, oil on wood panel, ca. 1456-59 (Kunsthistorisches Museum, Vienna) Speakers: Dr. Beth Harris, Dr. Steven Zucker For more art history videos, visit Smarthistory.org", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y1_N1GAsS5I.mp4/y1_N1GAsS5I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y1_N1GAsS5I.mp4/y1_N1GAsS5I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y1_N1GAsS5I.m3u8/y1_N1GAsS5I.m3u8"}, "slug": "andrea-mantegna-saint-sebastian-c-1456-59", "video_id": "y1_N1GAsS5I", "youtube_id": "y1_N1GAsS5I", "readable_id": "andrea-mantegna-saint-sebastian-c-1456-59"}, "fpLNz9ZsdO8": {"duration": 579, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/heisenberg-uncertainty-principle-edited/", "keywords": "", "id": "fpLNz9ZsdO8", "title": "Heisenberg uncertainty principle", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fpLNz9ZsdO8.mp4/fpLNz9ZsdO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fpLNz9ZsdO8.mp4/fpLNz9ZsdO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fpLNz9ZsdO8.m3u8/fpLNz9ZsdO8.m3u8"}, "slug": "heisenberg-uncertainty-principle-edited", "video_id": "fpLNz9ZsdO8", "youtube_id": "fpLNz9ZsdO8", "readable_id": "heisenberg-uncertainty-principle-edited"}, "74XxAsDmUaM": {"duration": 175, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-8/", "keywords": "", "id": "74XxAsDmUaM", "title": "8 More unknowns than equations", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/74XxAsDmUaM.mp4/74XxAsDmUaM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/74XxAsDmUaM.mp4/74XxAsDmUaM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/74XxAsDmUaM.m3u8/74XxAsDmUaM.m3u8"}, "slug": "sat-2010-may-9-8", "video_id": "74XxAsDmUaM", "youtube_id": "74XxAsDmUaM", "readable_id": "sat-2010-may-9-8"}, "FXZ2O1Lv-KE": {"duration": 652, "path": "khan/math/probability/statistics-inferential/sampling_distribution/sampling-distribution-of-the-sample-mean/", "keywords": "central, limit, theorem, sampling, distribution, sample, mean, CC_6_SP_2, CC_6_SP_4, CC_6_SP_5_c, CC_6_SP_5_d, CC_7_SP_1, CC_7_SP_2", "id": "FXZ2O1Lv-KE", "title": "Sampling distribution of the sample mean", "description": "The central limit theorem and the sampling distribution of the sample mean", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FXZ2O1Lv-KE.mp4/FXZ2O1Lv-KE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FXZ2O1Lv-KE.mp4/FXZ2O1Lv-KE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FXZ2O1Lv-KE.m3u8/FXZ2O1Lv-KE.m3u8"}, "slug": "sampling-distribution-of-the-sample-mean", "video_id": "FXZ2O1Lv-KE", "youtube_id": "FXZ2O1Lv-KE", "readable_id": "sampling-distribution-of-the-sample-mean"}, "w1_EEi8-EaI": {"duration": 413, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-occupational-lung-diseases/asbestosis-silicosis-sick-building-syndrome/", "keywords": "", "id": "w1_EEi8-EaI", "title": "Asbestosis, silicosis, sick building syndrome", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w1_EEi8-EaI.mp4/w1_EEi8-EaI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w1_EEi8-EaI.mp4/w1_EEi8-EaI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w1_EEi8-EaI.m3u8/w1_EEi8-EaI.m3u8"}, "slug": "asbestosis-silicosis-sick-building-syndrome", "video_id": "w1_EEi8-EaI", "youtube_id": "w1_EEi8-EaI", "readable_id": "asbestosis-silicosis-sick-building-syndrome"}, "L87VpmRLAPg": {"duration": 663, "path": "khan/humanities/history/1600s-1800s/slavery-and-the-civil-war/strategy-of-the-civil-war/", "keywords": "education,online learning,learning,lessons", "id": "L87VpmRLAPg", "title": "Strategy of the Civil War", "description": "Strategy of the Civil War. The advantages and disadvantages of the North and South in the American Civil War.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L87VpmRLAPg.mp4/L87VpmRLAPg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L87VpmRLAPg.mp4/L87VpmRLAPg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L87VpmRLAPg.m3u8/L87VpmRLAPg.m3u8"}, "slug": "strategy-of-the-civil-war", "video_id": "L87VpmRLAPg", "youtube_id": "L87VpmRLAPg", "readable_id": "strategy-of-the-civil-war"}, "54c_oPpTTP8": {"duration": 409, "path": "khan/science/health-and-medicine/healthcare-misc/low-salt-diet/", "keywords": "", "id": "54c_oPpTTP8", "title": "Low salt diet", "description": "Figure out the difference between \"salt\" and \"sodium\" and how much salt is recommended on a low sodium diet. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/54c_oPpTTP8.mp4/54c_oPpTTP8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/54c_oPpTTP8.mp4/54c_oPpTTP8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/54c_oPpTTP8.m3u8/54c_oPpTTP8.m3u8"}, "slug": "low-salt-diet", "video_id": "54c_oPpTTP8", "youtube_id": "54c_oPpTTP8", "readable_id": "low-salt-diet"}, "06j_zPdPWOY": {"duration": 486, "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/economic-profit-tutorial/economic-profit-vs-accounting-profit/", "keywords": "microeconomics, accounting, firm, marquee", "id": "06j_zPdPWOY", "title": "Economic profit vs accounting profit", "description": "Difference between a firm's accounting and economic profit", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/06j_zPdPWOY.mp4/06j_zPdPWOY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/06j_zPdPWOY.mp4/06j_zPdPWOY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/06j_zPdPWOY.m3u8/06j_zPdPWOY.m3u8"}, "slug": "economic-profit-vs-accounting-profit", "video_id": "06j_zPdPWOY", "youtube_id": "06j_zPdPWOY", "readable_id": "economic-profit-vs-accounting-profit"}, "jRnkxSfwIpU": {"duration": 240, "path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/creating-system-of-inequalities-word-problem/", "keywords": "education,online learning,learning,lessons", "id": "jRnkxSfwIpU", "title": "How to model a real-world situation with a system of inequalities (example)", "description": "Sal models a word problem about baking cupcakes and muffins by creating a system of linear inequalities.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jRnkxSfwIpU.mp4/jRnkxSfwIpU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jRnkxSfwIpU.mp4/jRnkxSfwIpU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jRnkxSfwIpU.m3u8/jRnkxSfwIpU.m3u8"}, "slug": "creating-system-of-inequalities-word-problem", "video_id": "jRnkxSfwIpU", "youtube_id": "jRnkxSfwIpU", "readable_id": "creating-system-of-inequalities-word-problem"}, "5ahti9i1eFM": {"duration": 823, "path": "khan/partner-content/brookings-institution/introduction-to-healthcare/paying-for-medicines-tiering-formularies/", "keywords": "", "id": "5ahti9i1eFM", "title": "Paying for medicines: tiering and formularies", "description": "In the second of two videos on paying for medications, the concepts of tiered drug pricing, preferred drug lists, and Medicare Part D are explained to shed some light on the issue.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5ahti9i1eFM.mp4/5ahti9i1eFM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5ahti9i1eFM.mp4/5ahti9i1eFM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5ahti9i1eFM.m3u8/5ahti9i1eFM.m3u8"}, "slug": "paying-for-medicines-tiering-formularies", "video_id": "5ahti9i1eFM", "youtube_id": "5ahti9i1eFM", "readable_id": "paying-for-medicines-tiering-formularies"}, "aUmApJMfUTc": {"duration": 278, "path": "khan/test-prep/mcat/processing-the-environment/memory/retrieval-cues/", "keywords": "", "id": "aUmApJMfUTc", "title": "Retrieval cues", "description": "Learn about how priming, environmental context, and internal state affect memory.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aUmApJMfUTc.mp4/aUmApJMfUTc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aUmApJMfUTc.mp4/aUmApJMfUTc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aUmApJMfUTc.m3u8/aUmApJMfUTc.m3u8"}, "slug": "retrieval-cues", "video_id": "aUmApJMfUTc", "youtube_id": "aUmApJMfUTc", "readable_id": "retrieval-cues"}, "13E90TAtZ30": {"duration": 489, "path": "khan/partner-content/lebron-asks-subject/lebron-asks/lebron-asks-about-comparing-earth-s-history-to-a-basketball-game/", "keywords": "lebron, khan", "id": "13E90TAtZ30", "title": "LeBron Asks: If Earth's history were a basketball game, when did humans appear?", "description": "LeBron James asks Sal about how long humanity has been around as compared to the history of the Earth", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/13E90TAtZ30.mp4/13E90TAtZ30.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/13E90TAtZ30.mp4/13E90TAtZ30.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/13E90TAtZ30.m3u8/13E90TAtZ30.m3u8"}, "slug": "lebron-asks-about-comparing-earth-s-history-to-a-basketball-game", "video_id": "13E90TAtZ30", "youtube_id": "13E90TAtZ30", "readable_id": "lebron-asks-about-comparing-earth-s-history-to-a-basketball-game"}, "8qfzpJvsp04": {"duration": 699, "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/introduction-to-intermolecular-forces/van-der-waals-forces/", "keywords": "chemistry, van, der, waals, london, dispersion, dipole", "id": "8qfzpJvsp04", "title": "Van der Waals forces", "description": "Van der Waals forces: London dispersion forces, dipole-dipole forces, \u00a0and hydrogen bonding.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8qfzpJvsp04.mp4/8qfzpJvsp04.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8qfzpJvsp04.mp4/8qfzpJvsp04.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8qfzpJvsp04.m3u8/8qfzpJvsp04.m3u8"}, "slug": "van-der-waals-forces", "video_id": "8qfzpJvsp04", "youtube_id": "8qfzpJvsp04", "readable_id": "van-der-waals-forces"}, "SIDRXhdQ0qQ": {"duration": 586, "path": "khan/test-prep/mcat/physical-processes/kinetic-molecular-theory-of-gas/boltzmanns-constant/", "keywords": "", "id": "SIDRXhdQ0qQ", "title": "Boltzmann's constant", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SIDRXhdQ0qQ.mp4/SIDRXhdQ0qQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SIDRXhdQ0qQ.mp4/SIDRXhdQ0qQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SIDRXhdQ0qQ.m3u8/SIDRXhdQ0qQ.m3u8"}, "slug": "boltzmanns-constant", "video_id": "SIDRXhdQ0qQ", "youtube_id": "SIDRXhdQ0qQ", "readable_id": "boltzmanns-constant"}, "ZrbbKMnPDUk": {"duration": 226, "path": "khan/humanities/history/euro-hist/hitler-nazis/night-of-the-long-knives/", "keywords": "", "id": "ZrbbKMnPDUk", "title": "Night of the Long Knives", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZrbbKMnPDUk.mp4/ZrbbKMnPDUk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZrbbKMnPDUk.mp4/ZrbbKMnPDUk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZrbbKMnPDUk.m3u8/ZrbbKMnPDUk.m3u8"}, "slug": "night-of-the-long-knives", "video_id": "ZrbbKMnPDUk", "youtube_id": "ZrbbKMnPDUk", "readable_id": "night-of-the-long-knives"}, "btGaOTXxXs8": {"duration": 541, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/disk-method-around-x-axis/", "keywords": "", "id": "btGaOTXxXs8", "title": "Disk method around x-axis", "description": "Finding the solid of revolution (constructed by revolving around the x-axis) using the disc method.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/btGaOTXxXs8.mp4/btGaOTXxXs8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/btGaOTXxXs8.mp4/btGaOTXxXs8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/btGaOTXxXs8.m3u8/btGaOTXxXs8.m3u8"}, "slug": "disk-method-around-x-axis", "video_id": "btGaOTXxXs8", "youtube_id": "btGaOTXxXs8", "readable_id": "disk-method-around-x-axis"}, "GQXUpB2NHvQ": {"duration": 379, "path": "khan/math/geometry/cc-geometry-circles/equation-of-a-circle/equation-for-a-circle-using-the-pythagorean-theorem/", "keywords": "", "id": "GQXUpB2NHvQ", "title": "Equation for a circle using the Pythagorean Theorem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GQXUpB2NHvQ.mp4/GQXUpB2NHvQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GQXUpB2NHvQ.mp4/GQXUpB2NHvQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GQXUpB2NHvQ.m3u8/GQXUpB2NHvQ.m3u8"}, "slug": "equation-for-a-circle-using-the-pythagorean-theorem", "video_id": "GQXUpB2NHvQ", "youtube_id": "GQXUpB2NHvQ", "readable_id": "equation-for-a-circle-using-the-pythagorean-theorem"}, "ywOr4OYqXOs": {"duration": 869, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/an-ipo/", "keywords": "ipo, initial, public, offering, syndicate, underwriters", "id": "ywOr4OYqXOs", "title": "An IPO", "description": "The initial public offering of our online sock company.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ywOr4OYqXOs.mp4/ywOr4OYqXOs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ywOr4OYqXOs.mp4/ywOr4OYqXOs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ywOr4OYqXOs.m3u8/ywOr4OYqXOs.m3u8"}, "slug": "an-ipo", "video_id": "ywOr4OYqXOs", "youtube_id": "ywOr4OYqXOs", "readable_id": "an-ipo"}, "OMEDRrGpybY": {"duration": 495, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/william-butterfield-all-saints-church-margaret-street/", "keywords": "William, Butterfield, All, Saints, Church, Margaret, Street, London, 1849, 1859, Victorian, Architecture, Gothic, Revival, Neo-Gothic, Ruskin", "id": "OMEDRrGpybY", "title": "William Butterfield, All Saints, Margaret Street", "description": "All Saints Church, 7 Margaret Street, London\nArchitect: William Butterfield\n\nPrimary patrons: Alexander Beresford Hope and Henry Tritton\n\nDesigned 1849\n\nCornerstone laid by Edward Bouverie Pusey, 1850\n\nConsecrated 1859\n\nSpeakers: Dr. Ayla Lepine and Dr. Steven Zucker\n\nWilliam Butterfield had little more than 100 square feet of real estate, but designed perhaps the greatest example of High Victorian Gothic architecture. The spire soars 227 feet above London and its interior is a kaleidoscope of color and pattern that expresses the vision of the Oxford Movement and the Ecclesiological Society. In 1841, the Society announced its intentions for their model church:\n\nIt must be in a Gothic Style.\n\nIt must be built of solid materials.\n\nIts ornament should decorate its construction.\n\nIts artist should be 'a single pious and laborious artist alone, pondering deeply over his duty to do his best for the service of God's Holy Religion'.\n\nAbove all the church must be built so that the 'Rubricks and Canons of the Church of England may be Consistently observed, and the Sacraments rubrically and decently administered\u2019.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OMEDRrGpybY.mp4/OMEDRrGpybY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OMEDRrGpybY.mp4/OMEDRrGpybY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OMEDRrGpybY.m3u8/OMEDRrGpybY.m3u8"}, "slug": "william-butterfield-all-saints-church-margaret-street", "video_id": "OMEDRrGpybY", "youtube_id": "OMEDRrGpybY", "readable_id": "william-butterfield-all-saints-church-margaret-street"}, "F6UQLiHB0k0": {"duration": 354, "path": "khan/partner-content/wi-phi/value-theory-1/the-good-life-kant/", "keywords": "The Good Life,Philosophy (Field Of Study),Immanuel Kant (Author),Western Philosophy (Field Of Study),History Of Philosophy (Field Of Study),Wi-Phi,Wireless Philosophy,University Of New Orleans (College/University),Khan Academy (Nonprofit Organization),Ethics (Quotation Subject),Morality (Quotation Subject),Chris Surprenant", "id": "F6UQLiHB0k0", "title": "The Good Life: Kant", "description": "Chris Surprenant (University of New Orleans) discusses the account of human well-being and the good life presented by Immanuel Kant in the his moral, political, and religious writings. He explains why Kant believes that the highest good for a human being is the conjunction of happiness and complete virtue and how it is possible for an individual to attain these two things at the same time.\n\nSpeaker: Dr.\u00a0Chris Surprenant, Associate Professor of Philosophy, University of New Orleans", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F6UQLiHB0k0.mp4/F6UQLiHB0k0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F6UQLiHB0k0.mp4/F6UQLiHB0k0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F6UQLiHB0k0.m3u8/F6UQLiHB0k0.m3u8"}, "slug": "the-good-life-kant", "video_id": "F6UQLiHB0k0", "youtube_id": "F6UQLiHB0k0", "readable_id": "the-good-life-kant"}, "6p1lweGactg": {"duration": 131, "path": "khan/math/geometry/similarity/similarity-and-transformations/testing-similarity-through-transformations/", "keywords": "", "id": "6p1lweGactg", "title": "Testing similarity through transformations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6p1lweGactg.mp4/6p1lweGactg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6p1lweGactg.mp4/6p1lweGactg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6p1lweGactg.m3u8/6p1lweGactg.m3u8"}, "slug": "testing-similarity-through-transformations", "video_id": "6p1lweGactg", "youtube_id": "6p1lweGactg", "readable_id": "testing-similarity-through-transformations"}, "FYMn61HLw1k": {"duration": 304, "path": "khan/math/multivariable-calculus/line_integrals_topic/position_vector_functions/differential-of-a-vector-valued-function/", "keywords": "differential, vector, valued, function", "id": "FYMn61HLw1k", "title": "Differential of a vector valued function", "description": "Understanding the differential of a vector valued function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FYMn61HLw1k.mp4/FYMn61HLw1k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FYMn61HLw1k.mp4/FYMn61HLw1k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FYMn61HLw1k.m3u8/FYMn61HLw1k.m3u8"}, "slug": "differential-of-a-vector-valued-function", "video_id": "FYMn61HLw1k", "youtube_id": "FYMn61HLw1k", "readable_id": "differential-of-a-vector-valued-function"}, "yj4oS-27Q3k": {"duration": 657, "path": "khan/math/geometry/triangle-properties/angle_bisectors/point-line-distance-and-angle-bisectors/", "keywords": "Point, Line, Distance, and, Angle, Bisectors", "id": "yj4oS-27Q3k", "title": "Point-line distance and angle bisectors", "description": "Thinking about the distance between a point and a line. Proof that a point on an angle bisector is equidistant to the sides of the angle and a point equidistant to the sides is on an angle bisector", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yj4oS-27Q3k.mp4/yj4oS-27Q3k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yj4oS-27Q3k.mp4/yj4oS-27Q3k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yj4oS-27Q3k.m3u8/yj4oS-27Q3k.m3u8"}, "slug": "point-line-distance-and-angle-bisectors", "video_id": "yj4oS-27Q3k", "youtube_id": "yj4oS-27Q3k", "readable_id": "point-line-distance-and-angle-bisectors"}, "fUxSB3yYIbs": {"duration": 414, "path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/elasticity-and-strange-percent-changes/", "keywords": "economics, supply, demand", "id": "fUxSB3yYIbs", "title": "Elasticity and strange percent changes", "description": "Why we calculate percent changes in a strange way when calculating elasticities", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fUxSB3yYIbs.mp4/fUxSB3yYIbs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fUxSB3yYIbs.mp4/fUxSB3yYIbs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fUxSB3yYIbs.m3u8/fUxSB3yYIbs.m3u8"}, "slug": "elasticity-and-strange-percent-changes", "video_id": "fUxSB3yYIbs", "youtube_id": "fUxSB3yYIbs", "readable_id": "elasticity-and-strange-percent-changes"}, "Bt60JVZRVCI": {"duration": 225, "path": "khan/math/pre-algebra/fractions-pre-alg/visualizing-equiv-fracs-pre-alg/visualizing-equivalent-fractions/", "keywords": "", "id": "Bt60JVZRVCI", "title": "Visualizing equivalent fractions", "description": "To understand equivalent fractions it helps to \"see\" the fractions using something like a grid with shaded and unshaded sections representing the fraction.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Bt60JVZRVCI.mp4/Bt60JVZRVCI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Bt60JVZRVCI.mp4/Bt60JVZRVCI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Bt60JVZRVCI.m3u8/Bt60JVZRVCI.m3u8"}, "slug": "visualizing-equivalent-fractions", "video_id": "Bt60JVZRVCI", "youtube_id": "Bt60JVZRVCI", "readable_id": "visualizing-equivalent-fractions"}, "I2M7U8eCeHA": {"duration": 327, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/sir-john-everett-millais-ophelia-1851-52/", "keywords": "Millais, Ophelia, GAP, Art History, Shakespeare, Hamlet, Pre-Raphaelite, Tate, Tate Britain, Khan Academy, suicide, Google Art Project", "id": "I2M7U8eCeHA", "title": "Sir John Everett Millais, Ophelia", "description": "Sir John Everett Millais, Ophelia, 1851-52, oil on canvas, 762 x 1118 mm (Tate Britain, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I2M7U8eCeHA.mp4/I2M7U8eCeHA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I2M7U8eCeHA.mp4/I2M7U8eCeHA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I2M7U8eCeHA.m3u8/I2M7U8eCeHA.m3u8"}, "slug": "sir-john-everett-millais-ophelia-1851-52", "video_id": "I2M7U8eCeHA", "youtube_id": "I2M7U8eCeHA", "readable_id": "sir-john-everett-millais-ophelia-1851-52"}, "s4cLM0l1gd4": {"duration": 298, "path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/midline-amplitude-period/", "keywords": "", "id": "s4cLM0l1gd4", "title": "Midline, amplitude and period of a function", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/s4cLM0l1gd4.mp4/s4cLM0l1gd4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/s4cLM0l1gd4.mp4/s4cLM0l1gd4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/s4cLM0l1gd4.m3u8/s4cLM0l1gd4.m3u8"}, "slug": "midline-amplitude-period", "video_id": "s4cLM0l1gd4", "youtube_id": "s4cLM0l1gd4", "readable_id": "midline-amplitude-period"}, "hrIPO8mQqtw": {"duration": 591, "path": "khan/math/multivariable-calculus/double_triple_integrals/double_integrals/double-integrals-5/", "keywords": "double, integral, calculus", "id": "hrIPO8mQqtw", "title": "Double integrals 5", "description": "Finding the volume when we have variable boundaries.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hrIPO8mQqtw.mp4/hrIPO8mQqtw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hrIPO8mQqtw.mp4/hrIPO8mQqtw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hrIPO8mQqtw.m3u8/hrIPO8mQqtw.m3u8"}, "slug": "double-integrals-5", "video_id": "hrIPO8mQqtw", "youtube_id": "hrIPO8mQqtw", "readable_id": "double-integrals-5"}, "eg7ltl5vll0": {"duration": 283, "path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/inbreeding/", "keywords": "", "id": "eg7ltl5vll0", "title": "Inbreeding", "description": "Learn about inbreeding and how it can hurt a population's genetic diversity. By Ross Firestone.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eg7ltl5vll0.mp4/eg7ltl5vll0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eg7ltl5vll0.mp4/eg7ltl5vll0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eg7ltl5vll0.m3u8/eg7ltl5vll0.m3u8"}, "slug": "inbreeding", "video_id": "eg7ltl5vll0", "youtube_id": "eg7ltl5vll0", "readable_id": "inbreeding"}, "YdJdeOPNY4g": {"duration": 636, "path": "khan/test-prep/mcat/behavior/learning-slug/biological-constraints-on-learning/", "keywords": "", "id": "YdJdeOPNY4g", "title": "Biological constraints on learning", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YdJdeOPNY4g.mp4/YdJdeOPNY4g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YdJdeOPNY4g.mp4/YdJdeOPNY4g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YdJdeOPNY4g.m3u8/YdJdeOPNY4g.m3u8"}, "slug": "biological-constraints-on-learning", "video_id": "YdJdeOPNY4g", "youtube_id": "YdJdeOPNY4g", "readable_id": "biological-constraints-on-learning"}, "gsNgdVdAT1o": {"duration": 860, "path": "khan/math/precalculus/precalc-matrices/inverting_matrices/matrices-to-solve-a-vector-combination-problem/", "keywords": "matrix, matrices, vectors", "id": "gsNgdVdAT1o", "title": "Matrices to solve a vector combination problem", "description": "Using matrices to figure out if some combination of 2 vectors can create a 3rd vector", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gsNgdVdAT1o.mp4/gsNgdVdAT1o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gsNgdVdAT1o.mp4/gsNgdVdAT1o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gsNgdVdAT1o.m3u8/gsNgdVdAT1o.m3u8"}, "slug": "matrices-to-solve-a-vector-combination-problem", "video_id": "gsNgdVdAT1o", "youtube_id": "gsNgdVdAT1o", "readable_id": "matrices-to-solve-a-vector-combination-problem"}, "C9onjpQGpSg": {"duration": 604, "path": "khan/economics-finance-domain/core-finance/current-economics/unemployment-tutorial/unemployment-rate-primer-v2/", "keywords": "economics, unemployment", "id": "C9onjpQGpSg", "title": "Unemployment rate primer (v2)", "description": "How the unemployment rate is calculated", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C9onjpQGpSg.mp4/C9onjpQGpSg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C9onjpQGpSg.mp4/C9onjpQGpSg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C9onjpQGpSg.m3u8/C9onjpQGpSg.m3u8"}, "slug": "unemployment-rate-primer-v2", "video_id": "C9onjpQGpSg", "youtube_id": "C9onjpQGpSg", "readable_id": "unemployment-rate-primer-v2"}, "3vKLU5_Hgco": {"duration": 333, "path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/tolerance-and-withdrawal/", "keywords": "", "id": "3vKLU5_Hgco", "title": "Tolerance and withdrawal", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3vKLU5_Hgco.mp4/3vKLU5_Hgco.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3vKLU5_Hgco.mp4/3vKLU5_Hgco.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3vKLU5_Hgco.m3u8/3vKLU5_Hgco.m3u8"}, "slug": "tolerance-and-withdrawal", "video_id": "3vKLU5_Hgco", "youtube_id": "3vKLU5_Hgco", "readable_id": "tolerance-and-withdrawal"}, "ecA0shEaARM": {"duration": 118, "path": "khan/college-admissions/applying-to-college/college-application-process/receiving-an-admissions-decision-admit-deny-or-waitlist/", "keywords": "", "id": "ecA0shEaARM", "title": "Receiving an admissions decision: Admit, deny, or waitlist", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ecA0shEaARM.mp4/ecA0shEaARM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ecA0shEaARM.mp4/ecA0shEaARM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ecA0shEaARM.m3u8/ecA0shEaARM.m3u8"}, "slug": "receiving-an-admissions-decision-admit-deny-or-waitlist", "video_id": "ecA0shEaARM", "youtube_id": "ecA0shEaARM", "readable_id": "receiving-an-admissions-decision-admit-deny-or-waitlist"}, "NFzma7NsHtI": {"duration": 158, "path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/identifying-a-function-s-derivative-example/", "keywords": "", "id": "NFzma7NsHtI", "title": "Identifying a function's derivative example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NFzma7NsHtI.mp4/NFzma7NsHtI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NFzma7NsHtI.mp4/NFzma7NsHtI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NFzma7NsHtI.m3u8/NFzma7NsHtI.m3u8"}, "slug": "identifying-a-function-s-derivative-example", "video_id": "NFzma7NsHtI", "youtube_id": "NFzma7NsHtI", "readable_id": "identifying-a-function-s-derivative-example"}, "ZAgQH2azx3w": {"duration": 658, "path": "khan/science/organic-chemistry/gen-chem-review/bond-line-structures/three-dimensional-bond-line-structures-new/", "keywords": "", "id": "ZAgQH2azx3w", "title": "Three-dimensional bond-line structures", "description": "How to represent three-dimensional molecules using bond-line structures", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZAgQH2azx3w.mp4/ZAgQH2azx3w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZAgQH2azx3w.mp4/ZAgQH2azx3w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZAgQH2azx3w.m3u8/ZAgQH2azx3w.m3u8"}, "slug": "three-dimensional-bond-line-structures-new", "video_id": "ZAgQH2azx3w", "youtube_id": "ZAgQH2azx3w", "readable_id": "three-dimensional-bond-line-structures-new"}, "ENFNyNPYfZU": {"duration": 400, "path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/shifting-and-reflecting-functions/", "keywords": "", "id": "ENFNyNPYfZU", "title": "Shifting and reflecting functions", "description": "Sal walks through several examples of how to write g(x) implicitly in terms of f(x) when g(x) is a shift or a reflection of f(x).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ENFNyNPYfZU.mp4/ENFNyNPYfZU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ENFNyNPYfZU.mp4/ENFNyNPYfZU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ENFNyNPYfZU.m3u8/ENFNyNPYfZU.m3u8"}, "slug": "shifting-and-reflecting-functions", "video_id": "ENFNyNPYfZU", "youtube_id": "ENFNyNPYfZU", "readable_id": "shifting-and-reflecting-functions"}, "D8NVS7itIOo": {"duration": 47, "path": "khan/science/discoveries-projects/discoveries/magnetism/how-to-neutralize-compass/", "keywords": "compass", "id": "D8NVS7itIOo", "title": "Neutralize a compass", "description": "How to neutralize a compass using two needles. How could this help us later? Why does this work?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D8NVS7itIOo.mp4/D8NVS7itIOo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D8NVS7itIOo.mp4/D8NVS7itIOo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D8NVS7itIOo.m3u8/D8NVS7itIOo.m3u8"}, "slug": "how-to-neutralize-compass", "video_id": "D8NVS7itIOo", "youtube_id": "D8NVS7itIOo", "readable_id": "how-to-neutralize-compass"}, "gflKYcGG6hc": {"duration": 239, "path": "khan/math/integral-calculus/integration-techniques/reverse-chain-rule/integral-of-tan-x/", "keywords": "", "id": "gflKYcGG6hc", "title": "Integral of tan x", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gflKYcGG6hc.mp4/gflKYcGG6hc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gflKYcGG6hc.mp4/gflKYcGG6hc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gflKYcGG6hc.m3u8/gflKYcGG6hc.m3u8"}, "slug": "integral-of-tan-x", "video_id": "gflKYcGG6hc", "youtube_id": "gflKYcGG6hc", "readable_id": "integral-of-tan-x"}, "CDf_aE5yg3A": {"duration": 791, "path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/tricky-lhopitals-rule-problem/", "keywords": "", "id": "CDf_aE5yg3A", "title": "Tricky L'Hopital's Rule problem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CDf_aE5yg3A.mp4/CDf_aE5yg3A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CDf_aE5yg3A.mp4/CDf_aE5yg3A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CDf_aE5yg3A.m3u8/CDf_aE5yg3A.m3u8"}, "slug": "tricky-lhopitals-rule-problem", "video_id": "CDf_aE5yg3A", "youtube_id": "CDf_aE5yg3A", "readable_id": "tricky-lhopitals-rule-problem"}, "2zDhafJ2wqQ": {"duration": 61, "path": "khan/partner-content/exploratorium/sound-explo/vocal-visualizer/vocal-visualizer-challenge/", "keywords": "", "id": "2zDhafJ2wqQ", "title": "Challenge: Get loud!", "description": "For a bigger and better light show, try experimenting with amplitude, frequency, and even the source of the sound (try your favorite song). Add in a friend and you\u2019ve now got a dueling laser-light show!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2zDhafJ2wqQ.mp4/2zDhafJ2wqQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2zDhafJ2wqQ.mp4/2zDhafJ2wqQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2zDhafJ2wqQ.m3u8/2zDhafJ2wqQ.m3u8"}, "slug": "vocal-visualizer-challenge", "video_id": "2zDhafJ2wqQ", "youtube_id": "2zDhafJ2wqQ", "readable_id": "vocal-visualizer-challenge"}, "9pRzyioUKp0": {"duration": 605, "path": "khan/partner-content/wi-phi/value-theory-1/problem-of-evil/", "keywords": "", "id": "9pRzyioUKp0", "title": "Ethics: The Problem of Evil", "description": "Sally discusses a classic argument that God does not exist, called 'The Problem of Evil'. Along the way, she distinguishes different ways in which people believe that God exists, and discusses what's bad about having contradictory beliefs.\n\nSpeaker: Dr. Sally Haslanger,\u00a0Ford Professor of Philosophy and\u00a0Women's & Gender Studies, MIT", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9pRzyioUKp0.mp4/9pRzyioUKp0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9pRzyioUKp0.mp4/9pRzyioUKp0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9pRzyioUKp0.m3u8/9pRzyioUKp0.m3u8"}, "slug": "problem-of-evil", "video_id": "9pRzyioUKp0", "youtube_id": "9pRzyioUKp0", "readable_id": "problem-of-evil"}, "WbDL7xN-Pn0": {"duration": 913, "path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-of-a-weak-acid-with-a-strong-base-continued/", "keywords": "", "id": "WbDL7xN-Pn0", "title": "Titration of a weak acid with a strong base (continued)", "description": "Calculating the pH for titration of acetic acid with strong base NaOH at equivalence point and past the equivalence point.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WbDL7xN-Pn0.mp4/WbDL7xN-Pn0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WbDL7xN-Pn0.mp4/WbDL7xN-Pn0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WbDL7xN-Pn0.m3u8/WbDL7xN-Pn0.m3u8"}, "slug": "titration-of-a-weak-acid-with-a-strong-base-continued", "video_id": "WbDL7xN-Pn0", "youtube_id": "WbDL7xN-Pn0", "readable_id": "titration-of-a-weak-acid-with-a-strong-base-continued"}, "S-agS4YaxxU": {"duration": 514, "path": "khan/math/integral-calculus/solid_revolution_topic/volume-solids-known-cross-sectio/volume-triangular-cross-section/", "keywords": "", "id": "S-agS4YaxxU", "title": "Volume of solid with known cross section", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S-agS4YaxxU.mp4/S-agS4YaxxU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S-agS4YaxxU.mp4/S-agS4YaxxU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S-agS4YaxxU.m3u8/S-agS4YaxxU.m3u8"}, "slug": "volume-triangular-cross-section", "video_id": "S-agS4YaxxU", "youtube_id": "S-agS4YaxxU", "readable_id": "volume-triangular-cross-section"}, "CYr4n5KJ-yw": {"duration": 297, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/symptoms-of-left-sided-heart-failure/", "keywords": "", "id": "CYr4n5KJ-yw", "title": "Symptoms of left sided heart failure", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CYr4n5KJ-yw.mp4/CYr4n5KJ-yw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CYr4n5KJ-yw.mp4/CYr4n5KJ-yw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CYr4n5KJ-yw.m3u8/CYr4n5KJ-yw.m3u8"}, "slug": "symptoms-of-left-sided-heart-failure", "video_id": "CYr4n5KJ-yw", "youtube_id": "CYr4n5KJ-yw", "readable_id": "symptoms-of-left-sided-heart-failure"}, "n7dI4n-0xGw": {"duration": 98, "path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-exhibition-day/", "keywords": "", "id": "n7dI4n-0xGw", "title": "DLab: Exhibition day", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n7dI4n-0xGw.mp4/n7dI4n-0xGw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n7dI4n-0xGw.mp4/n7dI4n-0xGw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n7dI4n-0xGw.m3u8/n7dI4n-0xGw.m3u8"}, "slug": "discovery-lab-exhibition-day", "video_id": "n7dI4n-0xGw", "youtube_id": "n7dI4n-0xGw", "readable_id": "discovery-lab-exhibition-day"}, "5u1Nrmdyd-A": {"duration": 191, "path": "khan/humanities/ancient-art-civilizations/roman/roman-republic/temple-of-portunus-rome-c-120-80-b-c-e/", "keywords": "smarthistory, art, art history, Rome, fortuna virilis, portunas", "id": "5u1Nrmdyd-A", "title": "Temple of Portunus", "description": "Temple of Portunus (formerly known as, Fortuna Virilis), travertine, tufa, and stucco, c. 120-80 B.C.E., Rome. Speakers: Beth Harris and Steven Zucker.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5u1Nrmdyd-A.mp4/5u1Nrmdyd-A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5u1Nrmdyd-A.mp4/5u1Nrmdyd-A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5u1Nrmdyd-A.m3u8/5u1Nrmdyd-A.m3u8"}, "slug": "temple-of-portunus-rome-c-120-80-b-c-e", "video_id": "5u1Nrmdyd-A", "youtube_id": "5u1Nrmdyd-A", "readable_id": "temple-of-portunus-rome-c-120-80-b-c-e"}, "vUOiOi-XaoQ": {"duration": 773, "path": "khan/economics-finance-domain/core-finance/current-economics/unemployment-tutorial/unemployment/", "keywords": "unemployment, economy, capacity, inflation, deflation", "id": "vUOiOi-XaoQ", "title": "Unemployment", "description": "Analyzing unemployment data to show that \"real\" unemployment is worse than the headline numbers show.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vUOiOi-XaoQ.mp4/vUOiOi-XaoQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vUOiOi-XaoQ.mp4/vUOiOi-XaoQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vUOiOi-XaoQ.m3u8/vUOiOi-XaoQ.m3u8"}, "slug": "unemployment", "video_id": "vUOiOi-XaoQ", "youtube_id": "vUOiOi-XaoQ", "readable_id": "unemployment"}, "Jeh5vudjmLI": {"duration": 116, "path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/graphing-points-and-naming-quadrants-exercise/", "keywords": "", "id": "Jeh5vudjmLI", "title": "Coordinate plane: graphing points and naming quadrants", "description": "This is a great exercise example in which we plot the ordered pair and then identify which quadrant the point lies. You'll get the hang of this quickly!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Jeh5vudjmLI.mp4/Jeh5vudjmLI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Jeh5vudjmLI.mp4/Jeh5vudjmLI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Jeh5vudjmLI.m3u8/Jeh5vudjmLI.m3u8"}, "slug": "graphing-points-and-naming-quadrants-exercise", "video_id": "Jeh5vudjmLI", "youtube_id": "Jeh5vudjmLI", "readable_id": "graphing-points-and-naming-quadrants-exercise"}, "cNlwi6lUCEM": {"duration": 482, "path": "khan/math/algebra-basics/core-algebra-systems/core-algebra-systems-word-problems/algebraic-word-problem/", "keywords": "U02_L1_T3_we1, Algebraic, Word, Problem, CC_6_EE_5, CC_6_EE_6, CC_7_EE_4_a, CC_8_EE_7_b", "id": "cNlwi6lUCEM", "title": "Linear systems word problem with substitution", "description": "Algebraic Word Problem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cNlwi6lUCEM.mp4/cNlwi6lUCEM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cNlwi6lUCEM.mp4/cNlwi6lUCEM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cNlwi6lUCEM.m3u8/cNlwi6lUCEM.m3u8"}, "slug": "algebraic-word-problem", "video_id": "cNlwi6lUCEM", "youtube_id": "cNlwi6lUCEM", "readable_id": "algebraic-word-problem"}, "apWQoMKVmW4": {"duration": 459, "path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-2/", "keywords": "", "id": "apWQoMKVmW4", "title": "Stokes' theorem proof part 2", "description": "Figuring out a parameterization of our surface and representing dS", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/apWQoMKVmW4.mp4/apWQoMKVmW4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/apWQoMKVmW4.mp4/apWQoMKVmW4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/apWQoMKVmW4.m3u8/apWQoMKVmW4.m3u8"}, "slug": "stokes-theorem-proof-part-2", "video_id": "apWQoMKVmW4", "youtube_id": "apWQoMKVmW4", "readable_id": "stokes-theorem-proof-part-2"}, "XTF0-54yJMk": {"duration": 899, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/pressure-in-the-left-heart-part-1/", "keywords": "", "id": "XTF0-54yJMk", "title": "Pressure in the left heart - part 1", "description": "Watch the pressure in the left heart go up and down with every heart beat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XTF0-54yJMk.mp4/XTF0-54yJMk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XTF0-54yJMk.mp4/XTF0-54yJMk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XTF0-54yJMk.m3u8/XTF0-54yJMk.m3u8"}, "slug": "pressure-in-the-left-heart-part-1", "video_id": "XTF0-54yJMk", "youtube_id": "XTF0-54yJMk", "readable_id": "pressure-in-the-left-heart-part-1"}, "sNgsCT0E7Es": {"duration": 543, "path": "khan/partner-content/cas-biodiversity/biodiversity-origin/evolutionary-causes/biodiversity-and-natural-selection-two/", "keywords": "", "id": "sNgsCT0E7Es", "title": "Biodiversity and natural selection", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sNgsCT0E7Es.mp4/sNgsCT0E7Es.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sNgsCT0E7Es.mp4/sNgsCT0E7Es.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sNgsCT0E7Es.m3u8/sNgsCT0E7Es.m3u8"}, "slug": "biodiversity-and-natural-selection-two", "video_id": "sNgsCT0E7Es", "youtube_id": "sNgsCT0E7Es", "readable_id": "biodiversity-and-natural-selection-two"}, "vSijVSL3ChU": {"duration": 512, "path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/rewriting-an-exponential-expression-in-a-hairier-way/", "keywords": "", "id": "vSijVSL3ChU", "title": "Rewriting an exponential expression in a hairier way", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vSijVSL3ChU.mp4/vSijVSL3ChU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vSijVSL3ChU.mp4/vSijVSL3ChU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vSijVSL3ChU.m3u8/vSijVSL3ChU.m3u8"}, "slug": "rewriting-an-exponential-expression-in-a-hairier-way", "video_id": "vSijVSL3ChU", "youtube_id": "vSijVSL3ChU", "readable_id": "rewriting-an-exponential-expression-in-a-hairier-way"}, "XDOH9Ul2OOM": {"duration": 153, "path": "khan/math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl/example-using-algebra-to-find-measure-of-complementary-angles/", "keywords": "", "id": "XDOH9Ul2OOM", "title": "Find measure of complementary angles", "description": "In this example, let's put some Algebra to work to find the measure of two angles whose sum equals 90 degrees, better knows as complementary angles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XDOH9Ul2OOM.mp4/XDOH9Ul2OOM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XDOH9Ul2OOM.mp4/XDOH9Ul2OOM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XDOH9Ul2OOM.m3u8/XDOH9Ul2OOM.m3u8"}, "slug": "example-using-algebra-to-find-measure-of-complementary-angles", "video_id": "XDOH9Ul2OOM", "youtube_id": "XDOH9Ul2OOM", "readable_id": "example-using-algebra-to-find-measure-of-complementary-angles"}, "hSkIG4MdKqU": {"duration": 557, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/bloodvessels/three-types-of-capillaries/", "keywords": "", "id": "hSkIG4MdKqU", "title": "Three types of capillaries", "description": "Learn the differences between continuous, fenestrated, and discontinuous capillaries, and how they affect the movement of molecules. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hSkIG4MdKqU.mp4/hSkIG4MdKqU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hSkIG4MdKqU.mp4/hSkIG4MdKqU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hSkIG4MdKqU.m3u8/hSkIG4MdKqU.m3u8"}, "slug": "three-types-of-capillaries", "video_id": "hSkIG4MdKqU", "youtube_id": "hSkIG4MdKqU", "readable_id": "three-types-of-capillaries"}, "gBxeju8dMho": {"duration": 118, "path": "khan/math/recreational-math/vi-hart/spirals-fibonacci/open-letter-to-nickelodeon-re-spongebob-s-pineapple-under-the-sea/", "keywords": "spongebob, pineapple, nickelodeon, snail, squarepants, math, mathematics, fibonacci", "id": "gBxeju8dMho", "title": "Open letter to Nickelodeon, re: SpongeBob's pineapple under the sea", "description": "SpongeBob background designer's response: \"OK, I guess the jig is up... I'm tired of living a lie.\" See his full message and pineapple redesign: http://kennypittenger.blogspot.com/2012/01/called-out.html\n\nP.S. http://youtu.be/sFTwc8kHSu4\nFor more on Fibonacci and Plants: http://youtu.be/ahXIMUkSXX0\nFor more snail: http://youtu.be/xbsAUq_nvxE", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gBxeju8dMho.mp4/gBxeju8dMho.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gBxeju8dMho.mp4/gBxeju8dMho.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gBxeju8dMho.m3u8/gBxeju8dMho.m3u8"}, "slug": "open-letter-to-nickelodeon-re-spongebob-s-pineapple-under-the-sea", "video_id": "gBxeju8dMho", "youtube_id": "gBxeju8dMho", "readable_id": "open-letter-to-nickelodeon-re-spongebob-s-pineapple-under-the-sea"}, "lsn16U5DWD4": {"duration": 471, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/taxes-and-perfectly-inelastic-demand/", "keywords": "microeconomics, elasticity, surplus", "id": "lsn16U5DWD4", "title": "Taxes and perfectly inelastic demand", "description": "Who bears the burden for the taxes when demand is inelastic", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lsn16U5DWD4.mp4/lsn16U5DWD4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lsn16U5DWD4.mp4/lsn16U5DWD4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lsn16U5DWD4.m3u8/lsn16U5DWD4.m3u8"}, "slug": "taxes-and-perfectly-inelastic-demand", "video_id": "lsn16U5DWD4", "youtube_id": "lsn16U5DWD4", "readable_id": "taxes-and-perfectly-inelastic-demand"}, "1PKOiYY9SPA": {"duration": 232, "path": "khan/humanities/ancient-art-civilizations/aegean-art1/mycenaean/agamemnon-mask/", "keywords": "", "id": "1PKOiYY9SPA", "title": "Mask of Agamemnon, Mycenae, c. 1550-1500 B.C.E.", "description": "Mask of Agamemnon, from shaft grave V, grave circle A, c.1550-1500 B.C.E., gold, 12 inches / 35 cm (National Archaeological Museum, Athens)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1PKOiYY9SPA.mp4/1PKOiYY9SPA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1PKOiYY9SPA.mp4/1PKOiYY9SPA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1PKOiYY9SPA.m3u8/1PKOiYY9SPA.m3u8"}, "slug": "agamemnon-mask", "video_id": "1PKOiYY9SPA", "youtube_id": "1PKOiYY9SPA", "readable_id": "agamemnon-mask"}, "5TtB1_Zfatc": {"duration": 708, "path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/regulation-of-glycolysis-and-gluconeogenesis/", "keywords": "", "id": "5TtB1_Zfatc", "title": "Regulation of glycolysis and gluconeogenesis", "description": "What are the major forms of regulation in metabolism? How do these apply to glycolysis and gluconeogenesis?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5TtB1_Zfatc.mp4/5TtB1_Zfatc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5TtB1_Zfatc.mp4/5TtB1_Zfatc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5TtB1_Zfatc.m3u8/5TtB1_Zfatc.m3u8"}, "slug": "regulation-of-glycolysis-and-gluconeogenesis", "video_id": "5TtB1_Zfatc", "youtube_id": "5TtB1_Zfatc", "readable_id": "regulation-of-glycolysis-and-gluconeogenesis"}, "bihBbqzL96Y": {"duration": 434, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/manet-olympia-1863-exhibited-1865/", "keywords": "Manet,", "id": "bihBbqzL96Y", "title": "Manet, Olympia", "description": "\u00c9douard Manet, Olympia, oil on canvas, 1863 (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\n\u00a0\n\n\u00c9douard Manet brought to Realism his curiosity about social mores. However, he was not interested in mirroring polite parlor conversations and middle class promenades in the Bois de \u00a0Boulogne (Paris\u2019 Central Park). Rather, Manet invented subjects that set the Parisians\u2019 teeth on edge.\u00a0\n\nIn 1865, Manet submitted his risqu\u00e9 painting of a courtesan greeting her client (in this case, you), Olympia, of 1863, to the French Salon. The jury for the 1865 Salon accepted this painting despite their disapproval of the subject matter, because two years earlier, Manet\u2019s Luncheon on the Grass created such a stir when it was rejected from the Salon. (It was instead exhibited in Emperor Napoleon III\u2019s conciliatory exhibition\u2014the Salon des R\u00e9fus\u00e9s, or the Exhibition of the Refused. Crowds came to the Salon des R\u00e9fus\u00e9s specifically to laugh and jeer at what they considered Manet\u2019s folly.)\n\nSomehow they were afraid another rejection would seem like a personal attack on Manet himself. The reasoning was odd, but the result was the same\u2014Olympia became infamous and the painting had to be hung very high to protect it from physical attacks.\u00a0\n\nManet was a Realist, but sometimes his \u201creal\u201d situations shocked and rocked the Parisian art world to its foundations. His later work was much tamer.\n\n(Text by Dr. Beth Gersh-Nesic)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bihBbqzL96Y.mp4/bihBbqzL96Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bihBbqzL96Y.mp4/bihBbqzL96Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bihBbqzL96Y.m3u8/bihBbqzL96Y.m3u8"}, "slug": "manet-olympia-1863-exhibited-1865", "video_id": "bihBbqzL96Y", "youtube_id": "bihBbqzL96Y", "readable_id": "manet-olympia-1863-exhibited-1865"}, "26WASJHF46A": {"duration": 357, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/reliquaries-manuscripts-tapestries/the-unicorn-in-captivity-1495-1505/", "keywords": "Unicorn in Captivity, Unicorn, Unicorn Tapestries, Hunt, 1495, 1505, Netherlandish, wool, silk, silver, gilt, Cloisters, Metropolitan, Museum, Art, woven, art history, Smarthistory", "id": "26WASJHF46A", "title": "The Unicorn in Captivity", "description": "The Unicorn in Captivity (one of seven woven hangings popularly known as the Unicorn Tapestries or the Hunt of the Unicorn), 1495-1505, South Netherlandish, wool, silk, silver, and gilt (The Cloisters, The Metropolitan Museum of Art)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/26WASJHF46A.mp4/26WASJHF46A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/26WASJHF46A.mp4/26WASJHF46A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/26WASJHF46A.m3u8/26WASJHF46A.m3u8"}, "slug": "the-unicorn-in-captivity-1495-1505", "video_id": "26WASJHF46A", "youtube_id": "26WASJHF46A", "readable_id": "the-unicorn-in-captivity-1495-1505"}, "JELm6peL_sI": {"duration": 239, "path": "khan/partner-content/wi-phi/critical-thinking/fallacy-of-composition/", "keywords": "", "id": "JELm6peL_sI", "title": "Fallacies: Fallacy of Composition", "description": "In this video, Paul Henne describes the fallacy of composition, an informal fallacy that arises when we assume that some whole has the same properties as its parts. He also discusses why there aren't colorless cats.\n\nSpeaker: Paul Henne", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JELm6peL_sI.mp4/JELm6peL_sI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JELm6peL_sI.mp4/JELm6peL_sI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JELm6peL_sI.m3u8/JELm6peL_sI.m3u8"}, "slug": "fallacy-of-composition", "video_id": "JELm6peL_sI", "youtube_id": "JELm6peL_sI", "readable_id": "fallacy-of-composition"}, "o7-i6KLoEkc": {"duration": 302, "path": "khan/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture/hindu-temples/", "keywords": "", "id": "o7-i6KLoEkc", "title": "Hindu temples", "description": "Explore the Hindu temples of India in this short documentary. Learn more about Hindu temples on education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o7-i6KLoEkc.mp4/o7-i6KLoEkc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o7-i6KLoEkc.mp4/o7-i6KLoEkc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o7-i6KLoEkc.m3u8/o7-i6KLoEkc.m3u8"}, "slug": "hindu-temples", "video_id": "o7-i6KLoEkc", "youtube_id": "o7-i6KLoEkc", "readable_id": "hindu-temples"}, "AmN0YyaTD60": {"duration": 249, "path": "khan/math/recreational-math/vi-hart/hexaflexagons/hexaflexagon-safety-guide/", "keywords": "", "id": "AmN0YyaTD60", "title": "Hexaflexagon safety guide", "description": "Don't let a flexigatastrophe happen to you! Happy Hexaflexagon Month, in honor of Martin Gardner. Yes, we've been encouraging recreational use of hexaflexagons and even hexaflexagon parties to happen on Oct. 21, but be sure to flex responsibly.This is my third hexaflexagon video this month. The first two are also awesome.Hexaflexagons: http://youtu.be/VIVIegSt81k Hexaflexagons 2: http://youtu.be/paQ10POrZh8To learn more about flexagons, Martin Gardner, or hosting a hexaflexagon party, go here: http://www.puzzles.com/hexaflexagonI stole the \"hexaflexadyslexia\" joke from @matthetube: https://twitter.com/matthetube/status/255446894128529408I'm @vihartvihart. Happy Flexing!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AmN0YyaTD60.mp4/AmN0YyaTD60.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AmN0YyaTD60.mp4/AmN0YyaTD60.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AmN0YyaTD60.m3u8/AmN0YyaTD60.m3u8"}, "slug": "hexaflexagon-safety-guide", "video_id": "AmN0YyaTD60", "youtube_id": "AmN0YyaTD60", "readable_id": "hexaflexagon-safety-guide"}, "pmHlKhv7C0E": {"duration": 898, "path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-of-a-weak-base-with-a-strong-acid/", "keywords": "", "id": "pmHlKhv7C0E", "title": "Titration of a weak base with a strong acid", "description": "Calculating the pH for titration of weak base, ammonia, with strong acid, HCl, before any HCl is added and at half-equivalence point.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pmHlKhv7C0E.mp4/pmHlKhv7C0E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pmHlKhv7C0E.mp4/pmHlKhv7C0E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pmHlKhv7C0E.m3u8/pmHlKhv7C0E.m3u8"}, "slug": "titration-of-a-weak-base-with-a-strong-acid", "video_id": "pmHlKhv7C0E", "youtube_id": "pmHlKhv7C0E", "readable_id": "titration-of-a-weak-base-with-a-strong-acid"}, "-rsYk4eCKnA": {"duration": 818, "path": "khan/science/biology/cellular-molecular-biology/photosynthesis/photosynthesis/", "keywords": "photosynthesis, biology", "id": "-rsYk4eCKnA", "title": "Photosynthesis", "description": "Overview of photosynthesis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-rsYk4eCKnA.mp4/-rsYk4eCKnA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-rsYk4eCKnA.mp4/-rsYk4eCKnA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-rsYk4eCKnA.m3u8/-rsYk4eCKnA.m3u8"}, "slug": "photosynthesis", "video_id": "-rsYk4eCKnA", "youtube_id": "-rsYk4eCKnA", "readable_id": "photosynthesis"}, "twhqVIokAQc": {"duration": 329, "path": "khan/test-prep/mcat/cells/cell-membrane-overview/membrane-dynamics/", "keywords": "", "id": "twhqVIokAQc", "title": "Membrane dynamics", "description": "Learn about how the phospholipids move around in our cell membrane in the fluid mosaic model. By William Tsai.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/twhqVIokAQc.mp4/twhqVIokAQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/twhqVIokAQc.mp4/twhqVIokAQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/twhqVIokAQc.m3u8/twhqVIokAQc.m3u8"}, "slug": "membrane-dynamics", "video_id": "twhqVIokAQc", "youtube_id": "twhqVIokAQc", "readable_id": "membrane-dynamics"}, "7GEUgRcnfVE": {"duration": 1361, "path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/proof-invertibility-implies-a-unique-solution-to-f-x-y/", "keywords": "invertible, inverse, domain, linear, algebra", "id": "7GEUgRcnfVE", "title": "Proof: Invertibility implies a unique solution to f(x)=y", "description": "Proof: Invertibility implies a unique solution to f(x)=y for all y in co-domain of f.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7GEUgRcnfVE.mp4/7GEUgRcnfVE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7GEUgRcnfVE.mp4/7GEUgRcnfVE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7GEUgRcnfVE.m3u8/7GEUgRcnfVE.m3u8"}, "slug": "proof-invertibility-implies-a-unique-solution-to-f-x-y", "video_id": "7GEUgRcnfVE", "youtube_id": "7GEUgRcnfVE", "readable_id": "proof-invertibility-implies-a-unique-solution-to-f-x-y"}, "dNHtdiVjQbM": {"duration": 464, "path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/conformational-stability-protein-folding-and-denaturation/", "keywords": "", "id": "dNHtdiVjQbM", "title": "Conformational stability: Protein folding and denaturation", "description": "Different bonds/interactions contribute to the stability of each level of protein structure. Let's explore some common ones such as peptide bonds, hydrogen bonds, and disulfide bonds. By Tracy Kovach.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dNHtdiVjQbM.mp4/dNHtdiVjQbM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dNHtdiVjQbM.mp4/dNHtdiVjQbM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dNHtdiVjQbM.m3u8/dNHtdiVjQbM.m3u8"}, "slug": "conformational-stability-protein-folding-and-denaturation", "video_id": "dNHtdiVjQbM", "youtube_id": "dNHtdiVjQbM", "readable_id": "conformational-stability-protein-folding-and-denaturation"}, "3nbalsyibKU": {"duration": 735, "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/aggregate-supply-demand-tut/short-run-aggregate-supply/", "keywords": "AD-AS, model, macroeconomics", "id": "3nbalsyibKU", "title": "Short run aggregate supply", "description": "Justifications for the aggregate supply curve to be upward sloping in the short-run", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3nbalsyibKU.mp4/3nbalsyibKU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3nbalsyibKU.mp4/3nbalsyibKU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3nbalsyibKU.m3u8/3nbalsyibKU.m3u8"}, "slug": "short-run-aggregate-supply", "video_id": "3nbalsyibKU", "youtube_id": "3nbalsyibKU", "readable_id": "short-run-aggregate-supply"}, "B5e7RMaz4IQ": {"duration": 497, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-chronic-bronchitis/rn-what-is-chronic-bronchitis/", "keywords": "", "id": "B5e7RMaz4IQ", "title": "What is chronic bronchitis?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/B5e7RMaz4IQ.mp4/B5e7RMaz4IQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/B5e7RMaz4IQ.mp4/B5e7RMaz4IQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/B5e7RMaz4IQ.m3u8/B5e7RMaz4IQ.m3u8"}, "slug": "rn-what-is-chronic-bronchitis", "video_id": "B5e7RMaz4IQ", "youtube_id": "B5e7RMaz4IQ", "readable_id": "rn-what-is-chronic-bronchitis"}, "aSokFEpoJFM": {"duration": 443, "path": "khan/math/geometry/basic-geometry/cross-sections/ways-to-cut-a-cube/", "keywords": "", "id": "aSokFEpoJFM", "title": "Ways to cut a cube", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aSokFEpoJFM.mp4/aSokFEpoJFM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aSokFEpoJFM.mp4/aSokFEpoJFM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aSokFEpoJFM.m3u8/aSokFEpoJFM.m3u8"}, "slug": "ways-to-cut-a-cube", "video_id": "aSokFEpoJFM", "youtube_id": "aSokFEpoJFM", "readable_id": "ways-to-cut-a-cube"}, "FICRd7Lp67s": {"duration": 259, "path": "khan/math/probability/independent-dependent-probability/basic_probability/probability-space-exercise-example/", "keywords": "", "id": "FICRd7Lp67s", "title": "Determining probability", "description": "In this example, determine the scenarios that are probable given the rolling of two dice.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FICRd7Lp67s.mp4/FICRd7Lp67s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FICRd7Lp67s.mp4/FICRd7Lp67s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FICRd7Lp67s.m3u8/FICRd7Lp67s.m3u8"}, "slug": "probability-space-exercise-example", "video_id": "FICRd7Lp67s", "youtube_id": "FICRd7Lp67s", "readable_id": "probability-space-exercise-example"}, "6dyWKD_JPhI": {"duration": 159, "path": "khan/math/geometry/transformations/dilations-scaling/thinking-about-dilations/", "keywords": "", "id": "6dyWKD_JPhI", "title": "How to draw the image of an expanding dilation about an arbitrary point (example)", "description": "Sal is given a rectangle on the coordinate plane and he draws the image of the rectangle under a dilation with scale factor 1 2/3 about an arbitrary point.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6dyWKD_JPhI.mp4/6dyWKD_JPhI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6dyWKD_JPhI.mp4/6dyWKD_JPhI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6dyWKD_JPhI.m3u8/6dyWKD_JPhI.m3u8"}, "slug": "thinking-about-dilations", "video_id": "6dyWKD_JPhI", "youtube_id": "6dyWKD_JPhI", "readable_id": "thinking-about-dilations"}, "-kn_8vUT0eI": {"duration": 515, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/percussion/timpani-interview-and-demonstration-with-principal-jauvon-gilliam/", "keywords": "", "id": "-kn_8vUT0eI", "title": "Timpani: Interview and demonstration with principal Jauvon Gilliam", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-kn_8vUT0eI.mp4/-kn_8vUT0eI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-kn_8vUT0eI.mp4/-kn_8vUT0eI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-kn_8vUT0eI.m3u8/-kn_8vUT0eI.m3u8"}, "slug": "timpani-interview-and-demonstration-with-principal-jauvon-gilliam", "video_id": "-kn_8vUT0eI", "youtube_id": "-kn_8vUT0eI", "readable_id": "timpani-interview-and-demonstration-with-principal-jauvon-gilliam"}, "pzQY-9Nmtws": {"duration": 374, "path": "khan/math/algebra-basics/core-algebra-foundations/core-algebra-foundations-negative-numbers/why-a-negative-times-a-negative-makes-intuitive-sense/", "keywords": "", "id": "pzQY-9Nmtws", "title": "Why a negative times a negative makes intuitive sense", "description": "Use the repeated addition model of multiplication to give an understanding of multiplying negative numbers.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pzQY-9Nmtws.mp4/pzQY-9Nmtws.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pzQY-9Nmtws.mp4/pzQY-9Nmtws.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pzQY-9Nmtws.m3u8/pzQY-9Nmtws.m3u8"}, "slug": "why-a-negative-times-a-negative-makes-intuitive-sense", "video_id": "pzQY-9Nmtws", "youtube_id": "pzQY-9Nmtws", "readable_id": "why-a-negative-times-a-negative-makes-intuitive-sense"}, "w7NhLkQynS8": {"duration": 164, "path": "khan/math/algebra/introduction-to-algebra/algebraic-fractions/algebraic-expression-adding-fractions/", "keywords": "", "id": "w7NhLkQynS8", "title": "Algebraic expression adding fractions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w7NhLkQynS8.mp4/w7NhLkQynS8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w7NhLkQynS8.mp4/w7NhLkQynS8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w7NhLkQynS8.m3u8/w7NhLkQynS8.m3u8"}, "slug": "algebraic-expression-adding-fractions", "video_id": "w7NhLkQynS8", "youtube_id": "w7NhLkQynS8", "readable_id": "algebraic-expression-adding-fractions"}, "XZDGrbyz0v0": {"duration": 433, "path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/approximating-functions-with-polynomials-part-3/", "keywords": "power, maclauren, taylor, series, derivative, infinite, sum", "id": "XZDGrbyz0v0", "title": "Approximating functions with polynomials (part 3)", "description": "A glimpse of the mystery of the Universe as we approximate e^x with an infinite series.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XZDGrbyz0v0.mp4/XZDGrbyz0v0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XZDGrbyz0v0.mp4/XZDGrbyz0v0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XZDGrbyz0v0.m3u8/XZDGrbyz0v0.m3u8"}, "slug": "approximating-functions-with-polynomials-part-3", "video_id": "XZDGrbyz0v0", "youtube_id": "XZDGrbyz0v0", "readable_id": "approximating-functions-with-polynomials-part-3"}, "rfyq32mHcYs": {"duration": 734, "path": "khan/math/differential-equations/laplace-transform/convolution-integral/using-the-convolution-theorem-to-solve-an-initial-value-prob/", "keywords": "laplace,convolution", "id": "rfyq32mHcYs", "title": "Using the convolution theorem to solve an initial value prob", "description": "Using the Convolution Theorem to solve an initial value problem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rfyq32mHcYs.mp4/rfyq32mHcYs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rfyq32mHcYs.mp4/rfyq32mHcYs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rfyq32mHcYs.m3u8/rfyq32mHcYs.m3u8"}, "slug": "using-the-convolution-theorem-to-solve-an-initial-value-prob", "video_id": "rfyq32mHcYs", "youtube_id": "rfyq32mHcYs", "readable_id": "using-the-convolution-theorem-to-solve-an-initial-value-prob"}, "etiD38iuYZk": {"duration": 160, "path": "khan/humanities/art-asia/art-japan/heian-period/stubborn/", "keywords": "authority, confidence, dignity, sculpture, wood, Asia", "id": "etiD38iuYZk", "title": "Fud\u014d My\u014d\u014d (Achala-vidyaraja)", "description": "Met curator Sin\u00e9ad Vilbar on inner conflict in Fud\u014d My\u014d\u014d (Achala-vidyaraja) dating from Japan\u2019s Heian period, 12th century.\n\nFud\u014d My\u014d\u014d is the most widely represented of the Buddhist deities known as My\u014d\u014d, or Kings of Brightness. A fierce protector of the Buddhist Law, he is a direct emanation of the Buddha Dainichi Nyorai, the principal Buddha of Esoteric Buddhism. The first sculptures of Fud\u014d made in Japan were seated, but standing sculptures like this one were carved beginning in the eleventh century. Fud\u014d uses his sword to cut through ignorance and his lasso to reign in those who would block the path to enlightenment. The heavy weight of the shoulders and back is planted firmly on the stiffened legs, appropriate for a deity whose name means the \u201cImmovable.\u201d\n\nImages of Fud\u014d are often housed in temple halls called Gomad\u014d where a fire-burning ritual called the goma-e is performed. The ritual involves the burning of incense and other possessions to symbolically destroy defilements. This statue, originally composed of six hollowed-out pieces of wood, was formerly the central icon of the Kuhonji Gomad\u014d in Funasaka, twenty miles northwest of Kyoto. The hall has not survived. Fud\u014d would once have had a mandorla carved in the shape of wild flames and inserted behind him into the rock upon which he stands.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a\u00a0related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/etiD38iuYZk.mp4/etiD38iuYZk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/etiD38iuYZk.mp4/etiD38iuYZk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/etiD38iuYZk.m3u8/etiD38iuYZk.m3u8"}, "slug": "stubborn", "video_id": "etiD38iuYZk", "youtube_id": "etiD38iuYZk", "readable_id": "stubborn"}, "rse0I7rZ8jM": {"duration": 749, "path": "khan/test-prep/mcat/physical-processes/thin-lenses/object-image-and-focal-distance-relationship-proof-of-formula/", "keywords": "Object, Image, and, Focal, Distance, Relationship, (Proof, of, Formula), optics", "id": "rse0I7rZ8jM", "title": "Object image and focal distance relationship (proof of formula)", "description": "Object Image and Focal Distance Relationship (Proof of Formula)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rse0I7rZ8jM.mp4/rse0I7rZ8jM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rse0I7rZ8jM.mp4/rse0I7rZ8jM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rse0I7rZ8jM.m3u8/rse0I7rZ8jM.m3u8"}, "slug": "object-image-and-focal-distance-relationship-proof-of-formula", "video_id": "rse0I7rZ8jM", "youtube_id": "rse0I7rZ8jM", "readable_id": "object-image-and-focal-distance-relationship-proof-of-formula"}, "HNP0USRtkIw": {"duration": 2066, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/angela-ahrendts/", "keywords": "", "id": "HNP0USRtkIw", "title": "Angela Ahrendts - Former CEO of Burberry", "description": "Angela Ahrendts visits\u00a0the Khan Academy office in Mountain View, CA on\u00a0April 30, 2013.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HNP0USRtkIw.mp4/HNP0USRtkIw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HNP0USRtkIw.mp4/HNP0USRtkIw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HNP0USRtkIw.m3u8/HNP0USRtkIw.m3u8"}, "slug": "angela-ahrendts", "video_id": "HNP0USRtkIw", "youtube_id": "HNP0USRtkIw", "readable_id": "angela-ahrendts"}, "dOlkogaWF3M": {"duration": 267, "path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/psychoactive-drugs-depressants-and-opiates/", "keywords": "", "id": "dOlkogaWF3M", "title": "Psychoactive drugs: Depressants and opiates", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dOlkogaWF3M.mp4/dOlkogaWF3M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dOlkogaWF3M.mp4/dOlkogaWF3M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dOlkogaWF3M.m3u8/dOlkogaWF3M.m3u8"}, "slug": "psychoactive-drugs-depressants-and-opiates", "video_id": "dOlkogaWF3M", "youtube_id": "dOlkogaWF3M", "readable_id": "psychoactive-drugs-depressants-and-opiates"}, "ANyVpMS3HL4": {"duration": 943, "path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/calculus-derivatives-1-new-hd-version/", "keywords": "calculus, derivative, CC_8_EE_5, CC_8_F_5, CC_39336_A-CED_2, CC_39336_A-REI_10", "id": "ANyVpMS3HL4", "title": "Derivative as slope of a tangent line", "description": "Understanding that the derivative is just the slope of a curve at a point (or the slope of the tangent line)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ANyVpMS3HL4.mp4/ANyVpMS3HL4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ANyVpMS3HL4.mp4/ANyVpMS3HL4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ANyVpMS3HL4.m3u8/ANyVpMS3HL4.m3u8"}, "slug": "calculus-derivatives-1-new-hd-version", "video_id": "ANyVpMS3HL4", "youtube_id": "ANyVpMS3HL4", "readable_id": "calculus-derivatives-1-new-hd-version"}, "TYFAJHx5LFA": {"duration": 758, "path": "khan/test-prep/mcat/chemical-processes/equilibrium-mcat/galvanic-cells-and-changes-in-free-energy/", "keywords": "", "id": "TYFAJHx5LFA", "title": "Galvanic cells and changes in free energy", "description": "Relationship between Gibbs free energy, reaction quotient Q, and cell voltage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TYFAJHx5LFA.mp4/TYFAJHx5LFA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TYFAJHx5LFA.mp4/TYFAJHx5LFA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TYFAJHx5LFA.m3u8/TYFAJHx5LFA.m3u8"}, "slug": "galvanic-cells-and-changes-in-free-energy", "video_id": "TYFAJHx5LFA", "youtube_id": "TYFAJHx5LFA", "readable_id": "galvanic-cells-and-changes-in-free-energy"}, "E4HAYd0QnRc": {"duration": 754, "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/range-variance-and-standard-deviation-as-measures-of-dispersion/", "keywords": "Range, Variance, and, Standard, Deviation, CC_6_SP_5_c", "id": "E4HAYd0QnRc", "title": "Range, variance and standard deviation as measures of dispersion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E4HAYd0QnRc.mp4/E4HAYd0QnRc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E4HAYd0QnRc.mp4/E4HAYd0QnRc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E4HAYd0QnRc.m3u8/E4HAYd0QnRc.m3u8"}, "slug": "range-variance-and-standard-deviation-as-measures-of-dispersion", "video_id": "E4HAYd0QnRc", "youtube_id": "E4HAYd0QnRc", "readable_id": "range-variance-and-standard-deviation-as-measures-of-dispersion"}, "sMyZO9YDlk8": {"duration": 269, "path": "khan/test-prep/mcat/behavior/behavior-and-genetics/gene-environment-interaction/", "keywords": "", "id": "sMyZO9YDlk8", "title": "Gene environment interaction", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sMyZO9YDlk8.mp4/sMyZO9YDlk8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sMyZO9YDlk8.mp4/sMyZO9YDlk8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sMyZO9YDlk8.m3u8/sMyZO9YDlk8.m3u8"}, "slug": "gene-environment-interaction", "video_id": "sMyZO9YDlk8", "youtube_id": "sMyZO9YDlk8", "readable_id": "gene-environment-interaction"}, "8Yl_u_Otcjg": {"duration": 308, "path": "khan/math/integral-calculus/integration-techniques/trig_substitution/another-substitution-with-x-sin-theta/", "keywords": "", "id": "8Yl_u_Otcjg", "title": "Another substitution with x=sin (theta)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8Yl_u_Otcjg.mp4/8Yl_u_Otcjg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8Yl_u_Otcjg.mp4/8Yl_u_Otcjg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8Yl_u_Otcjg.m3u8/8Yl_u_Otcjg.m3u8"}, "slug": "another-substitution-with-x-sin-theta", "video_id": "8Yl_u_Otcjg", "youtube_id": "8Yl_u_Otcjg", "readable_id": "another-substitution-with-x-sin-theta"}, "NvGTCzAfvr0": {"duration": 202, "path": "khan/math/pre-algebra/negatives-absolute-value-pre-alg/abs-value-pre-alg/absolute-value-1/", "keywords": "U02_L2_T1_we2, Absolute, Value, CC_6_NS_7, CC_6_NS_7_c", "id": "NvGTCzAfvr0", "title": "Absolute value smallest to biggest", "description": "Not only will we identify several absolute values in this example, but we will order them from smallest to largest. Content provided by The NROC Project - \u00a9Monterey Institute for Technology and Education", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NvGTCzAfvr0.mp4/NvGTCzAfvr0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NvGTCzAfvr0.mp4/NvGTCzAfvr0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NvGTCzAfvr0.m3u8/NvGTCzAfvr0.m3u8"}, "slug": "absolute-value-1", "video_id": "NvGTCzAfvr0", "youtube_id": "NvGTCzAfvr0", "readable_id": "absolute-value-1"}, "XDIBJyNnLOU": {"duration": 673, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/economics-of-a-cupcake-factory/", "keywords": "economics, finance, inflation, deflation, income, statement", "id": "XDIBJyNnLOU", "title": "Economics of a cupcake factory", "description": "Economics of a simple business leading up to a discussion on inflation/deflation. Touching on income statements.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XDIBJyNnLOU.mp4/XDIBJyNnLOU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XDIBJyNnLOU.mp4/XDIBJyNnLOU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XDIBJyNnLOU.m3u8/XDIBJyNnLOU.m3u8"}, "slug": "economics-of-a-cupcake-factory", "video_id": "XDIBJyNnLOU", "youtube_id": "XDIBJyNnLOU", "readable_id": "economics-of-a-cupcake-factory"}, "iG7dJTInT7E": {"duration": 670, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-chronic-bronchitis/chronic-bronchitis-treatment/", "keywords": "", "id": "iG7dJTInT7E", "title": "Chronic bronchitis treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iG7dJTInT7E.mp4/iG7dJTInT7E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iG7dJTInT7E.mp4/iG7dJTInT7E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iG7dJTInT7E.m3u8/iG7dJTInT7E.m3u8"}, "slug": "chronic-bronchitis-treatment", "video_id": "iG7dJTInT7E", "youtube_id": "iG7dJTInT7E", "readable_id": "chronic-bronchitis-treatment"}, "IXRMVcoqRRQ": {"duration": 133, "path": "khan/math/algebra2/functions-and-graphs/function-introduction/understanding-function-notation-example-3/", "keywords": "", "id": "IXRMVcoqRRQ", "title": "Function notation in context example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IXRMVcoqRRQ.mp4/IXRMVcoqRRQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IXRMVcoqRRQ.mp4/IXRMVcoqRRQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IXRMVcoqRRQ.m3u8/IXRMVcoqRRQ.m3u8"}, "slug": "understanding-function-notation-example-3", "video_id": "IXRMVcoqRRQ", "youtube_id": "IXRMVcoqRRQ", "readable_id": "understanding-function-notation-example-3"}, "nUxbejIJqQ4": {"duration": 95, "path": "khan/partner-content/exploratorium/light-and-color/soap-film-interference-model/how-does-it-work-soap-film-interference-model-science-snacks-exploratorium/", "keywords": "light,wavelength,color,interference,soap,bubbles,demonstration,NGSS,physics,lesson", "id": "nUxbejIJqQ4", "title": "What's going on? Wave drawings, light, and color", "description": "What does a wave drawing of light actually represent? Paul gives his explanation, as well as tips on teaching this activity in your classroom.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nUxbejIJqQ4.mp4/nUxbejIJqQ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nUxbejIJqQ4.mp4/nUxbejIJqQ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nUxbejIJqQ4.m3u8/nUxbejIJqQ4.m3u8"}, "slug": "how-does-it-work-soap-film-interference-model-science-snacks-exploratorium", "video_id": "nUxbejIJqQ4", "youtube_id": "nUxbejIJqQ4", "readable_id": "how-does-it-work-soap-film-interference-model-science-snacks-exploratorium"}, "Bjnw_jwDt1Q": {"duration": 660, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/mitral-valve-regurgitation-and-mitral-valve-prolapse/", "keywords": "", "id": "Bjnw_jwDt1Q", "title": "Mitral valve regurgitation and mitral valve prolapse", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Bjnw_jwDt1Q.mp4/Bjnw_jwDt1Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Bjnw_jwDt1Q.mp4/Bjnw_jwDt1Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Bjnw_jwDt1Q.m3u8/Bjnw_jwDt1Q.m3u8"}, "slug": "mitral-valve-regurgitation-and-mitral-valve-prolapse", "video_id": "Bjnw_jwDt1Q", "youtube_id": "Bjnw_jwDt1Q", "readable_id": "mitral-valve-regurgitation-and-mitral-valve-prolapse"}, "loAA3TCNAvU": {"duration": 315, "path": "khan/math/on-sixth-grade-math/on-measurement/on-area/area-breaking-up-shape/", "keywords": "", "id": "loAA3TCNAvU", "title": "Finding area by breaking up the shape", "description": "Don't be intimidated by odd looking geometric figures and being asked to find its area. In this example you'll understand that breaking up the figure into smaller geometric shapes that are regular make the task a lot easier.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/loAA3TCNAvU.mp4/loAA3TCNAvU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/loAA3TCNAvU.mp4/loAA3TCNAvU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/loAA3TCNAvU.m3u8/loAA3TCNAvU.m3u8"}, "slug": "area-breaking-up-shape", "video_id": "loAA3TCNAvU", "youtube_id": "loAA3TCNAvU", "readable_id": "area-breaking-up-shape"}, "XTMbRDRaviM": {"duration": 560, "path": "khan/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/cartels-cheat-tutorial/game-theory-of-cheating-firms/", "keywords": "microeconomics", "id": "XTMbRDRaviM", "title": "Game theory of cheating firms", "description": "Pareto Optimality and more on Nash Equilibrium. Seeing how cheating duopolists parallels the prisoners dilemma", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XTMbRDRaviM.mp4/XTMbRDRaviM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XTMbRDRaviM.mp4/XTMbRDRaviM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XTMbRDRaviM.m3u8/XTMbRDRaviM.m3u8"}, "slug": "game-theory-of-cheating-firms", "video_id": "XTMbRDRaviM", "youtube_id": "XTMbRDRaviM", "readable_id": "game-theory-of-cheating-firms"}, "6gUY5NoX1Lk": {"duration": 924, "path": "khan/science/biology/her/heredity-and-genetics/rna-transcription-and-translation/", "keywords": "", "id": "6gUY5NoX1Lk", "title": "DNA replication and RNA transcription and translation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6gUY5NoX1Lk.mp4/6gUY5NoX1Lk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6gUY5NoX1Lk.mp4/6gUY5NoX1Lk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6gUY5NoX1Lk.m3u8/6gUY5NoX1Lk.m3u8"}, "slug": "rna-transcription-and-translation", "video_id": "6gUY5NoX1Lk", "youtube_id": "6gUY5NoX1Lk", "readable_id": "rna-transcription-and-translation"}, "vZ9vwiGHXgY": {"duration": 473, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/hypoxic-vasoconstriction/", "keywords": "", "id": "vZ9vwiGHXgY", "title": "Hypoxic vasoconstriction", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vZ9vwiGHXgY.mp4/vZ9vwiGHXgY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vZ9vwiGHXgY.mp4/vZ9vwiGHXgY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vZ9vwiGHXgY.m3u8/vZ9vwiGHXgY.m3u8"}, "slug": "hypoxic-vasoconstriction", "video_id": "vZ9vwiGHXgY", "youtube_id": "vZ9vwiGHXgY", "readable_id": "hypoxic-vasoconstriction"}, "3SgVUlEcOBU": {"duration": 462, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/present-value/present-value-3/", "keywords": "present, value, DCF, finance", "id": "3SgVUlEcOBU", "title": "Present value 3", "description": "What happens when we change the discount rate?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3SgVUlEcOBU.mp4/3SgVUlEcOBU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3SgVUlEcOBU.mp4/3SgVUlEcOBU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3SgVUlEcOBU.m3u8/3SgVUlEcOBU.m3u8"}, "slug": "present-value-3", "video_id": "3SgVUlEcOBU", "youtube_id": "3SgVUlEcOBU", "readable_id": "present-value-3"}, "6BR0Q5e74bs": {"duration": 604, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/organic-chemistry-naming-examples-5/", "keywords": "Organic, Chemistry, Naming, Examples", "id": "6BR0Q5e74bs", "title": "Organic chemistry naming examples 5", "description": "Organic Chemistry Naming Examples 5", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6BR0Q5e74bs.mp4/6BR0Q5e74bs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6BR0Q5e74bs.mp4/6BR0Q5e74bs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6BR0Q5e74bs.m3u8/6BR0Q5e74bs.m3u8"}, "slug": "organic-chemistry-naming-examples-5", "video_id": "6BR0Q5e74bs", "youtube_id": "6BR0Q5e74bs", "readable_id": "organic-chemistry-naming-examples-5"}, "aP-IPzDzasM": {"duration": 237, "path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-regiochemistry-new/", "keywords": "Diels\u2013Alder Reaction,Regioselectivity", "id": "aP-IPzDzasM", "title": "Diels-Alder: regiochemistry", "description": "How to determine the regiochemical product of a Diels-Alder reaction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aP-IPzDzasM.mp4/aP-IPzDzasM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aP-IPzDzasM.mp4/aP-IPzDzasM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aP-IPzDzasM.m3u8/aP-IPzDzasM.m3u8"}, "slug": "diels-alder-regiochemistry-new", "video_id": "aP-IPzDzasM", "youtube_id": "aP-IPzDzasM", "readable_id": "diels-alder-regiochemistry-new"}, "8HSeHRGihkY": {"duration": 586, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/valvular-heart-disease-diagnosis-and-treatment/", "keywords": "", "id": "8HSeHRGihkY", "title": "Valvular heart disease diagnosis and treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8HSeHRGihkY.mp4/8HSeHRGihkY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8HSeHRGihkY.mp4/8HSeHRGihkY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8HSeHRGihkY.m3u8/8HSeHRGihkY.m3u8"}, "slug": "valvular-heart-disease-diagnosis-and-treatment", "video_id": "8HSeHRGihkY", "youtube_id": "8HSeHRGihkY", "readable_id": "valvular-heart-disease-diagnosis-and-treatment"}, "d9hQk2Mmpcw": {"duration": 661, "path": "khan/humanities/history/1600s-1800s/slavery-and-the-civil-war/slavery-and-missouri-compromise-in-early-1800s/", "keywords": "education,online learning,learning,lessons,Missouri (US State),United States Of America (Country),Missouri Compromise (Literature Subject),Slavery In The United States (Literature Subject)", "id": "d9hQk2Mmpcw", "title": "Slavery and Missouri Compromise in early 1800s", "description": "Kim Kutz explains how slavery was an issue at the birth of the United States and how the issue became more and more central as the country expanded.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d9hQk2Mmpcw.mp4/d9hQk2Mmpcw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d9hQk2Mmpcw.mp4/d9hQk2Mmpcw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d9hQk2Mmpcw.m3u8/d9hQk2Mmpcw.m3u8"}, "slug": "slavery-and-missouri-compromise-in-early-1800s", "video_id": "d9hQk2Mmpcw", "youtube_id": "d9hQk2Mmpcw", "readable_id": "slavery-and-missouri-compromise-in-early-1800s"}, "98qfFzqDKR8": {"duration": 845, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/stocks-intro-tutorial/what-it-means-to-buy-a-company-s-stock/", "keywords": "stock, shares, investment, personal, finance", "id": "98qfFzqDKR8", "title": "What it means to buy a company's stock", "description": "What it means to buy a company's stock", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/98qfFzqDKR8.mp4/98qfFzqDKR8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/98qfFzqDKR8.mp4/98qfFzqDKR8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/98qfFzqDKR8.m3u8/98qfFzqDKR8.m3u8"}, "slug": "what-it-means-to-buy-a-company-s-stock", "video_id": "98qfFzqDKR8", "youtube_id": "98qfFzqDKR8", "readable_id": "what-it-means-to-buy-a-company-s-stock"}, "Wv-yAXU_azM": {"duration": 97, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/subordination-coordination-basic/", "keywords": "education,online learning,learning,lessons", "id": "Wv-yAXU_azM", "title": "Writing: Subordination and coordination \u2014 Basic example", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing subordination and coordination.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Wv-yAXU_azM.mp4/Wv-yAXU_azM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Wv-yAXU_azM.mp4/Wv-yAXU_azM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Wv-yAXU_azM.m3u8/Wv-yAXU_azM.m3u8"}, "slug": "subordination-coordination-basic", "video_id": "Wv-yAXU_azM", "youtube_id": "Wv-yAXU_azM", "readable_id": "subordination-coordination-basic"}, "a70-dYvDJZY": {"duration": 667, "path": "khan/math/trigonometry/less-basic-trigonometry/trig_iden_tutorial/trigonometry-identity-review-fun/", "keywords": "trig, trigonometry", "id": "a70-dYvDJZY", "title": "Trigonometry identity review/fun", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a70-dYvDJZY.mp4/a70-dYvDJZY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a70-dYvDJZY.mp4/a70-dYvDJZY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a70-dYvDJZY.m3u8/a70-dYvDJZY.m3u8"}, "slug": "trigonometry-identity-review-fun", "video_id": "a70-dYvDJZY", "youtube_id": "a70-dYvDJZY", "readable_id": "trigonometry-identity-review-fun"}, "qrU3ghYJjEw": {"duration": 140, "path": "khan/computing/computer-programming/html-css/html-css-further-learning/html-validation/", "keywords": "", "id": "qrU3ghYJjEw", "title": "HTML validation", "description": "Learn how to validate your webpages with the W3C validator service.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qrU3ghYJjEw.mp4/qrU3ghYJjEw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qrU3ghYJjEw.mp4/qrU3ghYJjEw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qrU3ghYJjEw.m3u8/qrU3ghYJjEw.m3u8"}, "slug": "html-validation", "video_id": "qrU3ghYJjEw", "youtube_id": "qrU3ghYJjEw", "readable_id": "html-validation"}, "YFvgM8r7Uvc": {"duration": 63, "path": "khan/humanities/art-asia/imperial-china/beginners-guide-imperial-china/heron-tower/", "keywords": "", "id": "YFvgM8r7Uvc", "title": "Ascending the Heron Tower written in cursive script", "description": "Master Chinese calligrapher Cai Xingyi writes the poem Ascending the Heron Tower by Poet Wang Zhihuan (688\u2013742) in cursive script.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YFvgM8r7Uvc.mp4/YFvgM8r7Uvc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YFvgM8r7Uvc.mp4/YFvgM8r7Uvc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YFvgM8r7Uvc.m3u8/YFvgM8r7Uvc.m3u8"}, "slug": "heron-tower", "video_id": "YFvgM8r7Uvc", "youtube_id": "YFvgM8r7Uvc", "readable_id": "heron-tower"}, "QEjWLj5wAFM": {"duration": 542, "path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/biological-basis-of-depression/", "keywords": "", "id": "QEjWLj5wAFM", "title": "Biological basis of depression", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QEjWLj5wAFM.mp4/QEjWLj5wAFM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QEjWLj5wAFM.mp4/QEjWLj5wAFM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QEjWLj5wAFM.m3u8/QEjWLj5wAFM.m3u8"}, "slug": "biological-basis-of-depression", "video_id": "QEjWLj5wAFM", "youtube_id": "QEjWLj5wAFM", "readable_id": "biological-basis-of-depression"}, "VrB3LaSD_uo": {"duration": 1015, "path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-determinant-when-row-is-added/", "keywords": "matrices, linear, algebra, determinant", "id": "VrB3LaSD_uo", "title": "Determinant when row is added", "description": "The determinant when one matrix has a row that is the sum of the rows of other matrices (and every other term is identical in the 3 matrices)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VrB3LaSD_uo.mp4/VrB3LaSD_uo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VrB3LaSD_uo.mp4/VrB3LaSD_uo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VrB3LaSD_uo.m3u8/VrB3LaSD_uo.m3u8"}, "slug": "linear-algebra-determinant-when-row-is-added", "video_id": "VrB3LaSD_uo", "youtube_id": "VrB3LaSD_uo", "readable_id": "linear-algebra-determinant-when-row-is-added"}, "i05-okb1EJg": {"duration": 1056, "path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/geometric-series-sum-to-figure-out-mortgage-payments/", "keywords": "geometric, series, mortgage, math, CC_39336_A-SSE_4", "id": "i05-okb1EJg", "title": "Geometric series sum to figure out mortgage payments", "description": "Figuring out the formula for fixed mortgage payments using the sum of a geometric series", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i05-okb1EJg.mp4/i05-okb1EJg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i05-okb1EJg.mp4/i05-okb1EJg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i05-okb1EJg.m3u8/i05-okb1EJg.m3u8"}, "slug": "geometric-series-sum-to-figure-out-mortgage-payments", "video_id": "i05-okb1EJg", "youtube_id": "i05-okb1EJg", "readable_id": "geometric-series-sum-to-figure-out-mortgage-payments"}, "MZl6Mna0leQ": {"duration": 354, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-1-common-factors/factoring-and-the-distributive-property-3/", "keywords": "U09_L1_T1_we3, Factoring, and, the, Distributive, Property, CC_8_EE_7_b, CC_39336_A-SSE_1_a, CC_39336_A-SSE_2", "id": "MZl6Mna0leQ", "title": "How to factor a polynomial with two variables by taking a common factor (example)", "description": "Sal factors 4x^4y-8x^3y-2x^2 as 2x^2(2x^2y-4xy).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MZl6Mna0leQ.mp4/MZl6Mna0leQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MZl6Mna0leQ.mp4/MZl6Mna0leQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MZl6Mna0leQ.m3u8/MZl6Mna0leQ.m3u8"}, "slug": "factoring-and-the-distributive-property-3", "video_id": "MZl6Mna0leQ", "youtube_id": "MZl6Mna0leQ", "readable_id": "factoring-and-the-distributive-property-3"}, "7G4BUm7M6MY": {"duration": 652, "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/indifference-curves-and-marginal-rate-of-substitution/", "keywords": "", "id": "7G4BUm7M6MY", "title": "Indifference curves and marginal rate of substitution", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7G4BUm7M6MY.mp4/7G4BUm7M6MY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7G4BUm7M6MY.mp4/7G4BUm7M6MY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7G4BUm7M6MY.m3u8/7G4BUm7M6MY.m3u8"}, "slug": "indifference-curves-and-marginal-rate-of-substitution", "video_id": "7G4BUm7M6MY", "youtube_id": "7G4BUm7M6MY", "readable_id": "indifference-curves-and-marginal-rate-of-substitution"}, "PzmKc8leu9o": {"duration": 167, "path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/comparing-colleges-special-focus-or-affiliation/", "keywords": "", "id": "PzmKc8leu9o", "title": "Comparing colleges based on special focus or affiliation", "description": "FIlter by special focus or affiliation using College Board's college search tool", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PzmKc8leu9o.mp4/PzmKc8leu9o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PzmKc8leu9o.mp4/PzmKc8leu9o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PzmKc8leu9o.m3u8/PzmKc8leu9o.m3u8"}, "slug": "comparing-colleges-special-focus-or-affiliation", "video_id": "PzmKc8leu9o", "youtube_id": "PzmKc8leu9o", "readable_id": "comparing-colleges-special-focus-or-affiliation"}, "fI6w2kL295Y": {"duration": 402, "path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/approximating-instantaneous-rate-of-change-word-problem-1/", "keywords": "", "id": "fI6w2kL295Y", "title": "Approximating instantaneous rate of change word problem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fI6w2kL295Y.mp4/fI6w2kL295Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fI6w2kL295Y.mp4/fI6w2kL295Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fI6w2kL295Y.m3u8/fI6w2kL295Y.m3u8"}, "slug": "approximating-instantaneous-rate-of-change-word-problem-1", "video_id": "fI6w2kL295Y", "youtube_id": "fI6w2kL295Y", "readable_id": "approximating-instantaneous-rate-of-change-word-problem-1"}, "MbpmP1esh-Q": {"duration": 161, "path": "khan/math/arithmetic/multiplication-division/long_division/long-division-with-remainder-example/", "keywords": "", "id": "MbpmP1esh-Q", "title": "Dividing numbers: example with remainders", "description": "Let's work this division problem together. Our division is getting \"longer\" as the numbers get bigger, but that won't be a problem for you! Watch for the remainder.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MbpmP1esh-Q.mp4/MbpmP1esh-Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MbpmP1esh-Q.mp4/MbpmP1esh-Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MbpmP1esh-Q.m3u8/MbpmP1esh-Q.m3u8"}, "slug": "long-division-with-remainder-example", "video_id": "MbpmP1esh-Q", "youtube_id": "MbpmP1esh-Q", "readable_id": "long-division-with-remainder-example"}, "gqrh8wbPXVE": {"duration": 505, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/nuclear-stability-and-nuclear-equasions/", "keywords": "", "id": "gqrh8wbPXVE", "title": "Nuclear stability and nuclear equations", "description": "Using the ratio of neutrons to protons to figure out of a nucleus will be stable or radioactive.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gqrh8wbPXVE.mp4/gqrh8wbPXVE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gqrh8wbPXVE.mp4/gqrh8wbPXVE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gqrh8wbPXVE.m3u8/gqrh8wbPXVE.m3u8"}, "slug": "nuclear-stability-and-nuclear-equasions", "video_id": "gqrh8wbPXVE", "youtube_id": "gqrh8wbPXVE", "readable_id": "nuclear-stability-and-nuclear-equasions"}, "3QWJrPq_HB0": {"duration": 569, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/nucleophilic-acyl-substitution/", "keywords": "", "id": "3QWJrPq_HB0", "title": "Nucleophilic acyl substitution", "description": "The general mechanism of nucleophilic acyl substitution (and leaving group stability)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3QWJrPq_HB0.mp4/3QWJrPq_HB0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3QWJrPq_HB0.mp4/3QWJrPq_HB0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3QWJrPq_HB0.m3u8/3QWJrPq_HB0.m3u8"}, "slug": "nucleophilic-acyl-substitution", "video_id": "3QWJrPq_HB0", "youtube_id": "3QWJrPq_HB0", "readable_id": "nucleophilic-acyl-substitution"}, "QPvhl66QCqo": {"duration": 131, "path": "khan/test-prep/mcat/behavior/human-development/germ-layer-derivatives/", "keywords": "", "id": "QPvhl66QCqo", "title": "Germ layer derivatives", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QPvhl66QCqo.mp4/QPvhl66QCqo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QPvhl66QCqo.mp4/QPvhl66QCqo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QPvhl66QCqo.m3u8/QPvhl66QCqo.m3u8"}, "slug": "germ-layer-derivatives", "video_id": "QPvhl66QCqo", "youtube_id": "QPvhl66QCqo", "readable_id": "germ-layer-derivatives"}, "lng4ZgConCM": {"duration": 761, "path": "khan/math/probability/regression/regression-correlation/r-squared-or-coefficient-of-determination/", "keywords": "R-Squared, or, Coefficient, of, Determination, CC_8_SP_2, CC_8_SP_3", "id": "lng4ZgConCM", "title": "R-squared or coefficient of determination", "description": "R-Squared or Coefficient of Determination", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lng4ZgConCM.mp4/lng4ZgConCM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lng4ZgConCM.mp4/lng4ZgConCM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lng4ZgConCM.m3u8/lng4ZgConCM.m3u8"}, "slug": "r-squared-or-coefficient-of-determination", "video_id": "lng4ZgConCM", "youtube_id": "lng4ZgConCM", "readable_id": "r-squared-or-coefficient-of-determination"}, "_E3gx_yQhHQ": {"duration": 291, "path": "khan/math/algebra/quadratics/quadratic-formula/applying-the-quadratic-formula/", "keywords": "u16_l5_t2_we2, Applying, the, Quadratic, Formula", "id": "_E3gx_yQhHQ", "title": "Example 5: Using the quadratic formula", "description": "Applying the Quadratic Formula", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_E3gx_yQhHQ.mp4/_E3gx_yQhHQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_E3gx_yQhHQ.mp4/_E3gx_yQhHQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_E3gx_yQhHQ.m3u8/_E3gx_yQhHQ.m3u8"}, "slug": "applying-the-quadratic-formula", "video_id": "_E3gx_yQhHQ", "youtube_id": "_E3gx_yQhHQ", "readable_id": "applying-the-quadratic-formula"}, "PJFzqfLMBIw": {"duration": 426, "path": "khan/test-prep/mcat/behavior/social-psychology/milgram-experiment-on-obedience/", "keywords": "", "id": "PJFzqfLMBIw", "title": "Milgram experiment on obedience", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PJFzqfLMBIw.mp4/PJFzqfLMBIw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PJFzqfLMBIw.mp4/PJFzqfLMBIw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PJFzqfLMBIw.m3u8/PJFzqfLMBIw.m3u8"}, "slug": "milgram-experiment-on-obedience", "video_id": "PJFzqfLMBIw", "youtube_id": "PJFzqfLMBIw", "readable_id": "milgram-experiment-on-obedience"}, "gG2HYC-Aw9Y": {"duration": 55, "path": "khan/partner-content/exploratorium/light-and-color/colored-shadows/playing-with-colored-shadows-how-it-works/", "keywords": "", "id": "gG2HYC-Aw9Y", "title": "What's going on: Light travels in straight lines", "description": "What's the science behind the phenomenon of colored shadows? Light travels in straight lines, but we have three different-colored bulbs spaced several inches apart.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gG2HYC-Aw9Y.mp4/gG2HYC-Aw9Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gG2HYC-Aw9Y.mp4/gG2HYC-Aw9Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gG2HYC-Aw9Y.m3u8/gG2HYC-Aw9Y.m3u8"}, "slug": "playing-with-colored-shadows-how-it-works", "video_id": "gG2HYC-Aw9Y", "youtube_id": "gG2HYC-Aw9Y", "readable_id": "playing-with-colored-shadows-how-it-works"}, "5zosU6XTgSY": {"duration": 882, "path": "khan/math/geometry/intro_euclid/the-golden-ratio/", "keywords": "golden, mean, ratio, marquee", "id": "5zosU6XTgSY", "title": "The golden ratio", "description": "An introduction to one of the most amazing ideas/numbers in mathematics", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5zosU6XTgSY.mp4/5zosU6XTgSY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5zosU6XTgSY.mp4/5zosU6XTgSY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5zosU6XTgSY.m3u8/5zosU6XTgSY.m3u8"}, "slug": "the-golden-ratio", "video_id": "5zosU6XTgSY", "youtube_id": "5zosU6XTgSY", "readable_id": "the-golden-ratio"}, "FO10z7FX13c": {"duration": 227, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses/neurotransmitter-removal/", "keywords": "", "id": "FO10z7FX13c", "title": "Neurotransmitter removal", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FO10z7FX13c.mp4/FO10z7FX13c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FO10z7FX13c.mp4/FO10z7FX13c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FO10z7FX13c.m3u8/FO10z7FX13c.m3u8"}, "slug": "neurotransmitter-removal", "video_id": "FO10z7FX13c", "youtube_id": "FO10z7FX13c", "readable_id": "neurotransmitter-removal"}, "YGyZX0VoRpI": {"duration": 634, "path": "khan/partner-content/wi-phi/value-theory-1/the-prisoners-dilemma/", "keywords": "Philosophy (Field Of Study),Dilemma,Political Philosophy (Field Of Study),Prisoner's Dilemma,Geoffrey Sayre-McCord,Khan Academy (Nonprofit Organization),Value,Western Philosophy (Field Of Study),University Of North Carolina At Chapel Hill (College/University),Wi-Phi,Wireless Philosophy,Economics (Field Of Study),Lecture (Type Of Public Presentation),game theory,explained", "id": "YGyZX0VoRpI", "title": "Political: The Prisoner's Dilemma", "description": "In this video, Professor Geoffrey Sayre-McCord (UNC-Chapel Hill) explains the prisoner's dilemma. The prisoner's dilemma is a scenario where all parties making rational choices ensures a less desired result for each than if each actor had chosen individually less-preferred options.\n\nSpeaker: Dr. Geoffrey Sayre-McCord, Professor of Philosophy, University of North Carolina at Chapel Hill", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YGyZX0VoRpI.mp4/YGyZX0VoRpI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YGyZX0VoRpI.mp4/YGyZX0VoRpI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YGyZX0VoRpI.m3u8/YGyZX0VoRpI.m3u8"}, "slug": "the-prisoners-dilemma", "video_id": "YGyZX0VoRpI", "youtube_id": "YGyZX0VoRpI", "readable_id": "the-prisoners-dilemma"}, "CGZZINHT0I8": {"duration": 240, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/x-and-y-intercepts/finding-intercepts-for-a-linear-function-from-a-table/", "keywords": "", "id": "CGZZINHT0I8", "title": "Finding intercepts from a table", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CGZZINHT0I8.mp4/CGZZINHT0I8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CGZZINHT0I8.mp4/CGZZINHT0I8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CGZZINHT0I8.m3u8/CGZZINHT0I8.m3u8"}, "slug": "finding-intercepts-for-a-linear-function-from-a-table", "video_id": "CGZZINHT0I8", "youtube_id": "CGZZINHT0I8", "readable_id": "finding-intercepts-for-a-linear-function-from-a-table"}, "IEKU6tubTEw": {"duration": 144, "path": "khan/math/algebra/introduction-to-algebra/writing-expressions-tutorial/writing-expressions-3-exercise-example-1/", "keywords": "", "id": "IEKU6tubTEw", "title": "Writing algebraic expressions word problem", "description": "Here we interpret data in a table and solve a word problem by writing an algebraic expression.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IEKU6tubTEw.mp4/IEKU6tubTEw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IEKU6tubTEw.mp4/IEKU6tubTEw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IEKU6tubTEw.m3u8/IEKU6tubTEw.m3u8"}, "slug": "writing-expressions-3-exercise-example-1", "video_id": "IEKU6tubTEw", "youtube_id": "IEKU6tubTEw", "readable_id": "writing-expressions-3-exercise-example-1"}, "g3MqSdO5Ubc": {"duration": 1209, "path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-determinant-as-scaling-factor/", "keywords": "determinant, area, transformation", "id": "g3MqSdO5Ubc", "title": "Determinant as scaling factor", "description": "Viewing the determinant of the transformation matrix as a scaling factor of regions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g3MqSdO5Ubc.mp4/g3MqSdO5Ubc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g3MqSdO5Ubc.mp4/g3MqSdO5Ubc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g3MqSdO5Ubc.m3u8/g3MqSdO5Ubc.m3u8"}, "slug": "linear-algebra-determinant-as-scaling-factor", "video_id": "g3MqSdO5Ubc", "youtube_id": "g3MqSdO5Ubc", "readable_id": "linear-algebra-determinant-as-scaling-factor"}, "twMdew4Zs8Q": {"duration": 204, "path": "khan/math/arithmetic/multiplication-division/multi_digit_multiplication/4-digit-times-1-digit-example/", "keywords": "", "id": "twMdew4Zs8Q", "title": "Multiplying: 4 digits times 1 digit (with carrying)", "description": "This is getting fun! We're now multiplying FOUR digits times one digit. Remember to carry!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/twMdew4Zs8Q.mp4/twMdew4Zs8Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/twMdew4Zs8Q.mp4/twMdew4Zs8Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/twMdew4Zs8Q.m3u8/twMdew4Zs8Q.m3u8"}, "slug": "4-digit-times-1-digit-example", "video_id": "twMdew4Zs8Q", "youtube_id": "twMdew4Zs8Q", "readable_id": "4-digit-times-1-digit-example"}, "6dWHPHELCKU": {"duration": 341, "path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-equestrian-monument-of-gattamelata/", "keywords": "", "id": "6dWHPHELCKU", "title": "Donatello, Equestrian Monument of Gattamelata", "description": "Donatello, Equestrian Monument of Gattamelata (Erasmo da Narni), 1445-53, bronze, 12 feet, 2 inches high, Piazza del Santo, Padua Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6dWHPHELCKU.mp4/6dWHPHELCKU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6dWHPHELCKU.mp4/6dWHPHELCKU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6dWHPHELCKU.m3u8/6dWHPHELCKU.m3u8"}, "slug": "donatello-equestrian-monument-of-gattamelata", "video_id": "6dWHPHELCKU", "youtube_id": "6dWHPHELCKU", "readable_id": "donatello-equestrian-monument-of-gattamelata"}, "AfjH7Xn8VB8": {"duration": 514, "path": "khan/test-prep/mcat/biomolecules/principles-of-bioenergetics/enthalpy-1/", "keywords": "", "id": "AfjH7Xn8VB8", "title": "Enthalpy", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AfjH7Xn8VB8.mp4/AfjH7Xn8VB8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AfjH7Xn8VB8.mp4/AfjH7Xn8VB8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AfjH7Xn8VB8.m3u8/AfjH7Xn8VB8.m3u8"}, "slug": "enthalpy-1", "video_id": "AfjH7Xn8VB8", "youtube_id": "AfjH7Xn8VB8", "readable_id": "enthalpy-1"}, "CJzuu_k9Nv0": {"duration": 343, "path": "khan/science/organic-chemistry/amines-topic/naming-amines/amine-naming-2/", "keywords": "Amine, Naming, nitro, phenyl, hydroxy, amino", "id": "CJzuu_k9Nv0", "title": "Amine naming 2", "description": "Amine Naming 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CJzuu_k9Nv0.mp4/CJzuu_k9Nv0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CJzuu_k9Nv0.mp4/CJzuu_k9Nv0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CJzuu_k9Nv0.m3u8/CJzuu_k9Nv0.m3u8"}, "slug": "amine-naming-2", "video_id": "CJzuu_k9Nv0", "youtube_id": "CJzuu_k9Nv0", "readable_id": "amine-naming-2"}, "5FEjrStgcF8": {"duration": 662, "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/scale-of-the-large/", "keywords": "scale, science", "id": "5FEjrStgcF8", "title": "Scale of the large", "description": "Attempting to comprehend the scale of the large", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5FEjrStgcF8.mp4/5FEjrStgcF8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5FEjrStgcF8.mp4/5FEjrStgcF8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5FEjrStgcF8.m3u8/5FEjrStgcF8.m3u8"}, "slug": "scale-of-the-large", "video_id": "5FEjrStgcF8", "youtube_id": "5FEjrStgcF8", "readable_id": "scale-of-the-large"}, "MSucylf4KhY": {"duration": 391, "path": "khan/test-prep/mcat/behavior/normative-and-non-normative-behavior/perspectives-on-deviance/", "keywords": "", "id": "MSucylf4KhY", "title": "Perspectives on deviance: Differential association, labeling theory, and strain theory", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MSucylf4KhY.mp4/MSucylf4KhY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MSucylf4KhY.mp4/MSucylf4KhY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MSucylf4KhY.m3u8/MSucylf4KhY.m3u8"}, "slug": "perspectives-on-deviance", "video_id": "MSucylf4KhY", "youtube_id": "MSucylf4KhY", "readable_id": "perspectives-on-deviance"}, "C0frzmxc5KU": {"duration": 327, "path": "khan/science/health-and-medicine/healthcare-misc/hyperplasia-in-colon-tissue/", "keywords": "medicine, pathology, histology", "id": "C0frzmxc5KU", "title": "Hyperplasia in colon tissue", "description": "Dr. Andy Connolly from Stanford Medical School shows Sal what hyperplasia in colon tissue looks like", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C0frzmxc5KU.mp4/C0frzmxc5KU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C0frzmxc5KU.mp4/C0frzmxc5KU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C0frzmxc5KU.m3u8/C0frzmxc5KU.m3u8"}, "slug": "hyperplasia-in-colon-tissue", "video_id": "C0frzmxc5KU", "youtube_id": "C0frzmxc5KU", "readable_id": "hyperplasia-in-colon-tissue"}, "xNf--q0YMq8": {"duration": 410, "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/endocrine-pancreas/", "keywords": "MCAT", "id": "xNf--q0YMq8", "title": "Endocrine pancreas", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xNf--q0YMq8.mp4/xNf--q0YMq8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xNf--q0YMq8.mp4/xNf--q0YMq8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xNf--q0YMq8.m3u8/xNf--q0YMq8.m3u8"}, "slug": "endocrine-pancreas", "video_id": "xNf--q0YMq8", "youtube_id": "xNf--q0YMq8", "readable_id": "endocrine-pancreas"}, "U5-3wnY04gU": {"duration": 646, "path": "khan/test-prep/mcat/chemical-processes/equilibrium-mcat/standard-change-in-free-energy-and-the-equilibrium-constant/", "keywords": "", "id": "U5-3wnY04gU", "title": "Standard change in free energy and the equilibrium constant", "description": "The relationship between standard Gibbs free energy change and the equilibrium constant K. Calculating K when you know the standard free energy of reaction.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U5-3wnY04gU.mp4/U5-3wnY04gU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U5-3wnY04gU.mp4/U5-3wnY04gU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U5-3wnY04gU.m3u8/U5-3wnY04gU.m3u8"}, "slug": "standard-change-in-free-energy-and-the-equilibrium-constant", "video_id": "U5-3wnY04gU", "youtube_id": "U5-3wnY04gU", "readable_id": "standard-change-in-free-energy-and-the-equilibrium-constant"}, "Oxt1DdfT8ME": {"duration": 514, "path": "khan/partner-content/wi-phi/metaphys-epistemology/conditionals-pt3/", "keywords": "", "id": "Oxt1DdfT8ME", "title": "Language: Conditionals, Part 3", "description": "In part 3 of the series on conditionals, Justin picks up where part 2\u00a0leaves off, introducing an alternative theory of conditionals: the strict conditional theory. According to the strict theory, conditionals express necessary connections between their antecedent and consequent. Justin shows how this theory avoids the problems facing the material conditional theory. However, the strict theory turns out to face a similar problem of its own!\n\nSpeaker: Dr. Justin Khoo, Assitant Professor, M.I.T.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Oxt1DdfT8ME.mp4/Oxt1DdfT8ME.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Oxt1DdfT8ME.mp4/Oxt1DdfT8ME.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Oxt1DdfT8ME.m3u8/Oxt1DdfT8ME.m3u8"}, "slug": "conditionals-pt3", "video_id": "Oxt1DdfT8ME", "youtube_id": "Oxt1DdfT8ME", "readable_id": "conditionals-pt3"}, "jWpiMu5LNdg": {"duration": 129, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/why-of-algebra/adding-and-subtracting-the-same-thing-from-both-sides/", "keywords": "", "id": "jWpiMu5LNdg", "title": "How to solve one-step equations", "description": "Learn how to solve one-step addition and subtraction equations by adding or subtracting the same thing from both sides of the equation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jWpiMu5LNdg.mp4/jWpiMu5LNdg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jWpiMu5LNdg.mp4/jWpiMu5LNdg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jWpiMu5LNdg.m3u8/jWpiMu5LNdg.m3u8"}, "slug": "adding-and-subtracting-the-same-thing-from-both-sides", "video_id": "jWpiMu5LNdg", "youtube_id": "jWpiMu5LNdg", "readable_id": "adding-and-subtracting-the-same-thing-from-both-sides"}, "_6kwhF6hoqQ": {"duration": 302, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/consumer-producer-surplus-tut/consumer-surplus-introduction/", "keywords": "consumer, surplus, marginal, benefit", "id": "_6kwhF6hoqQ", "title": "Consumer surplus introduction", "description": "Consumer surplus as difference between marginal benefit and price paid", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_6kwhF6hoqQ.mp4/_6kwhF6hoqQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_6kwhF6hoqQ.mp4/_6kwhF6hoqQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_6kwhF6hoqQ.m3u8/_6kwhF6hoqQ.m3u8"}, "slug": "consumer-surplus-introduction", "video_id": "_6kwhF6hoqQ", "youtube_id": "_6kwhF6hoqQ", "readable_id": "consumer-surplus-introduction"}, "kzYtx_AqzjM": {"duration": 44, "path": "khan/math/algebra2/functions-and-graphs/function-introduction/understanding-function-notation-example-2/", "keywords": "", "id": "kzYtx_AqzjM", "title": "How to evaluate a function given its graph (example)", "description": "Sal evaluates a function at x=-1 using the graph of that function.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kzYtx_AqzjM.mp4/kzYtx_AqzjM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kzYtx_AqzjM.mp4/kzYtx_AqzjM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kzYtx_AqzjM.m3u8/kzYtx_AqzjM.m3u8"}, "slug": "understanding-function-notation-example-2", "video_id": "kzYtx_AqzjM", "youtube_id": "kzYtx_AqzjM", "readable_id": "understanding-function-notation-example-2"}, "bEJxFs0f35o": {"duration": 440, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/halogenation-and-ozonolysis-of-alkynes/", "keywords": "", "id": "bEJxFs0f35o", "title": "Halogenation and ozonolysis of alkynes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bEJxFs0f35o.mp4/bEJxFs0f35o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bEJxFs0f35o.mp4/bEJxFs0f35o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bEJxFs0f35o.m3u8/bEJxFs0f35o.m3u8"}, "slug": "halogenation-and-ozonolysis-of-alkynes", "video_id": "bEJxFs0f35o", "youtube_id": "bEJxFs0f35o", "readable_id": "halogenation-and-ozonolysis-of-alkynes"}, "2CsQ_l1S2_Y": {"duration": 468, "path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/showing-explicit-and-implicit-differentiation-give-same-result/", "keywords": "", "id": "2CsQ_l1S2_Y", "title": "Showing explicit and implicit differentiation give same result", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2CsQ_l1S2_Y.mp4/2CsQ_l1S2_Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2CsQ_l1S2_Y.mp4/2CsQ_l1S2_Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2CsQ_l1S2_Y.m3u8/2CsQ_l1S2_Y.m3u8"}, "slug": "showing-explicit-and-implicit-differentiation-give-same-result", "video_id": "2CsQ_l1S2_Y", "youtube_id": "2CsQ_l1S2_Y", "readable_id": "showing-explicit-and-implicit-differentiation-give-same-result"}, "j_Taf2Tgggo": {"duration": 818, "path": "khan/math/differential-equations/first-order-differential-equations/logistic-differential-equation/solving-logistic-differential-equation-part-1/", "keywords": "", "id": "j_Taf2Tgggo", "title": "Solving the logistic differential equation part 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j_Taf2Tgggo.mp4/j_Taf2Tgggo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j_Taf2Tgggo.mp4/j_Taf2Tgggo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j_Taf2Tgggo.m3u8/j_Taf2Tgggo.m3u8"}, "slug": "solving-logistic-differential-equation-part-1", "video_id": "j_Taf2Tgggo", "youtube_id": "j_Taf2Tgggo", "readable_id": "solving-logistic-differential-equation-part-1"}, "4Azskeheo_g": {"duration": 192, "path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/data-on-chinese-m1-increase-in-2010/", "keywords": "Data, on, Chinese, M1, Increase, in, 2010", "id": "4Azskeheo_g", "title": "Data on Chinese M1 increase in 2010", "description": "Data on Chinese M1 Increase in 2010", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4Azskeheo_g.mp4/4Azskeheo_g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4Azskeheo_g.mp4/4Azskeheo_g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4Azskeheo_g.m3u8/4Azskeheo_g.m3u8"}, "slug": "data-on-chinese-m1-increase-in-2010", "video_id": "4Azskeheo_g", "youtube_id": "4Azskeheo_g", "readable_id": "data-on-chinese-m1-increase-in-2010"}, "FBn1RlGfdzg": {"duration": 244, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/sat-3-camouflage/", "keywords": "", "id": "FBn1RlGfdzg", "title": "3 Camouflage", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FBn1RlGfdzg.mp4/FBn1RlGfdzg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FBn1RlGfdzg.mp4/FBn1RlGfdzg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FBn1RlGfdzg.m3u8/FBn1RlGfdzg.m3u8"}, "slug": "sat-3-camouflage", "video_id": "FBn1RlGfdzg", "youtube_id": "FBn1RlGfdzg", "readable_id": "sat-3-camouflage"}, "9wXdONpguLw": {"duration": 195, "path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/ratio-between-cocentric-arcs/", "keywords": "", "id": "9wXdONpguLw", "title": "Ratio between concentric arcs", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9wXdONpguLw.mp4/9wXdONpguLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9wXdONpguLw.mp4/9wXdONpguLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9wXdONpguLw.m3u8/9wXdONpguLw.m3u8"}, "slug": "ratio-between-cocentric-arcs", "video_id": "9wXdONpguLw", "youtube_id": "9wXdONpguLw", "readable_id": "ratio-between-cocentric-arcs"}, "mzLOT6uOfO4": {"duration": 487, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/alpha-beta-and-gamma-decay/", "keywords": "", "id": "mzLOT6uOfO4", "title": "Writing nuclear equations for alpha, beta, and gamma decay", "description": "Writing nuclear equations for alpha, beta, and gamma decay.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mzLOT6uOfO4.mp4/mzLOT6uOfO4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mzLOT6uOfO4.mp4/mzLOT6uOfO4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mzLOT6uOfO4.m3u8/mzLOT6uOfO4.m3u8"}, "slug": "alpha-beta-and-gamma-decay", "video_id": "mzLOT6uOfO4", "youtube_id": "mzLOT6uOfO4", "readable_id": "alpha-beta-and-gamma-decay"}, "juM2ROSLWfw": {"duration": 1067, "path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/krebs-citric-acid-cycle/", "keywords": "Krebs, citric, acid, cycle", "id": "juM2ROSLWfw", "title": "Krebs / citric acid cycle", "description": "Overview of the Krebs or Citric Acid Cycle", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/juM2ROSLWfw.mp4/juM2ROSLWfw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/juM2ROSLWfw.mp4/juM2ROSLWfw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/juM2ROSLWfw.m3u8/juM2ROSLWfw.m3u8"}, "slug": "krebs-citric-acid-cycle", "video_id": "juM2ROSLWfw", "youtube_id": "juM2ROSLWfw", "readable_id": "krebs-citric-acid-cycle"}, "0UrcjBLz6B0": {"duration": 156, "path": "khan/college-admissions/get-started/importance-of-college/college-experience/", "keywords": "", "id": "0UrcjBLz6B0", "title": "The college experience", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0UrcjBLz6B0.mp4/0UrcjBLz6B0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0UrcjBLz6B0.mp4/0UrcjBLz6B0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0UrcjBLz6B0.m3u8/0UrcjBLz6B0.m3u8"}, "slug": "college-experience", "video_id": "0UrcjBLz6B0", "youtube_id": "0UrcjBLz6B0", "readable_id": "college-experience"}, "0z52CLjC2C0": {"duration": 304, "path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/both-bounds-being-a-function-of-x/", "keywords": "", "id": "0z52CLjC2C0", "title": "Both bounds being a function of x", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0z52CLjC2C0.mp4/0z52CLjC2C0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0z52CLjC2C0.mp4/0z52CLjC2C0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0z52CLjC2C0.m3u8/0z52CLjC2C0.m3u8"}, "slug": "both-bounds-being-a-function-of-x", "video_id": "0z52CLjC2C0", "youtube_id": "0z52CLjC2C0", "readable_id": "both-bounds-being-a-function-of-x"}, "o-D-8B_5ibU": {"duration": 187, "path": "khan/math/early-math/cc-early-math-measure-data-topic/cc-early-math-compare-estimate-length/comparing-lengths/", "keywords": "", "id": "o-D-8B_5ibU", "title": "Comparing lengths", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o-D-8B_5ibU.mp4/o-D-8B_5ibU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o-D-8B_5ibU.mp4/o-D-8B_5ibU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o-D-8B_5ibU.m3u8/o-D-8B_5ibU.m3u8"}, "slug": "comparing-lengths", "video_id": "o-D-8B_5ibU", "youtube_id": "o-D-8B_5ibU", "readable_id": "comparing-lengths"}, "UgXZFel0H8Q": {"duration": 356, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis/diagnosing-and-treating-pertussis/", "keywords": "", "id": "UgXZFel0H8Q", "title": "Pertussis diagnosis and treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UgXZFel0H8Q.mp4/UgXZFel0H8Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UgXZFel0H8Q.mp4/UgXZFel0H8Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UgXZFel0H8Q.m3u8/UgXZFel0H8Q.m3u8"}, "slug": "diagnosing-and-treating-pertussis", "video_id": "UgXZFel0H8Q", "youtube_id": "UgXZFel0H8Q", "readable_id": "diagnosing-and-treating-pertussis"}, "pWSq7CGh9tg": {"duration": 193, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-11-love-and-marriage/", "keywords": "", "id": "pWSq7CGh9tg", "title": "11 Love and marriage", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pWSq7CGh9tg.mp4/pWSq7CGh9tg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pWSq7CGh9tg.mp4/pWSq7CGh9tg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pWSq7CGh9tg.m3u8/pWSq7CGh9tg.m3u8"}, "slug": "sat-11-love-and-marriage", "video_id": "pWSq7CGh9tg", "youtube_id": "pWSq7CGh9tg", "readable_id": "sat-11-love-and-marriage"}, "h6YWCuuJVj4": {"duration": 324, "path": "khan/computing/computer-science/cryptography/comp-number-theory/what-is-computer-memory-prime-adventure-part-7/", "keywords": "computer memory", "id": "h6YWCuuJVj4", "title": "What is computer memory?", "description": "What is the limit of computer memory?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h6YWCuuJVj4.mp4/h6YWCuuJVj4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h6YWCuuJVj4.mp4/h6YWCuuJVj4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h6YWCuuJVj4.m3u8/h6YWCuuJVj4.m3u8"}, "slug": "what-is-computer-memory-prime-adventure-part-7", "video_id": "h6YWCuuJVj4", "youtube_id": "h6YWCuuJVj4", "readable_id": "what-is-computer-memory-prime-adventure-part-7"}, "vl9o9XEfXtw": {"duration": 354, "path": "khan/math/algebra/quadratics/factoring-quadratics/example-3-solving-a-quadratic-equation-by-factoring/", "keywords": "U09_L2_T2_we3, Solving, Quadratic, Equations, by, Factoring, 3.avi, CC_6_EE_2_c, CC_7_G_6, CC_39336_A-REI_4, CC_39336_A-REI_4_b", "id": "vl9o9XEfXtw", "title": "Dimensions from volume of box", "description": "U09_L2_T2_we3 Solving Quadratic Equations by Factoring 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vl9o9XEfXtw.mp4/vl9o9XEfXtw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vl9o9XEfXtw.mp4/vl9o9XEfXtw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vl9o9XEfXtw.m3u8/vl9o9XEfXtw.m3u8"}, "slug": "example-3-solving-a-quadratic-equation-by-factoring", "video_id": "vl9o9XEfXtw", "youtube_id": "vl9o9XEfXtw", "readable_id": "example-3-solving-a-quadratic-equation-by-factoring"}, "QskZ-o0egF8": {"duration": 701, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/risk-factors-for-stroke/", "keywords": "", "id": "QskZ-o0egF8", "title": "Risk factors for stroke", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QskZ-o0egF8.mp4/QskZ-o0egF8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QskZ-o0egF8.mp4/QskZ-o0egF8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QskZ-o0egF8.m3u8/QskZ-o0egF8.m3u8"}, "slug": "risk-factors-for-stroke", "video_id": "QskZ-o0egF8", "youtube_id": "QskZ-o0egF8", "readable_id": "risk-factors-for-stroke"}, "-TpiL4J_yUA": {"duration": 156, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/core-algebra-exponent-properties/exponent-properties-1/", "keywords": "u11_l1_t2_we1, Exponent, Properties", "id": "-TpiL4J_yUA", "title": "Exponent properties 1", "description": "When multiplying numbers with common base, add exponents", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-TpiL4J_yUA.mp4/-TpiL4J_yUA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-TpiL4J_yUA.mp4/-TpiL4J_yUA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-TpiL4J_yUA.m3u8/-TpiL4J_yUA.m3u8"}, "slug": "exponent-properties-1", "video_id": "-TpiL4J_yUA", "youtube_id": "-TpiL4J_yUA", "readable_id": "exponent-properties-1"}, "0URl8p39wQo": {"duration": 236, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/atrial-flutter/", "keywords": "", "id": "0URl8p39wQo", "title": "Atrial flutter (AFL)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0URl8p39wQo.mp4/0URl8p39wQo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0URl8p39wQo.mp4/0URl8p39wQo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0URl8p39wQo.m3u8/0URl8p39wQo.m3u8"}, "slug": "atrial-flutter", "video_id": "0URl8p39wQo", "youtube_id": "0URl8p39wQo", "readable_id": "atrial-flutter"}, "azBNsPa1WC4": {"duration": 551, "path": "khan/math/geometry/basic-geometry/koch_snowflake/koch-snowflake-fractal/", "keywords": "fractal, geometry, marquee", "id": "azBNsPa1WC4", "title": "Koch snowflake fractal", "description": "A shape that has an infinite perimeter but finite area", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/azBNsPa1WC4.mp4/azBNsPa1WC4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/azBNsPa1WC4.mp4/azBNsPa1WC4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/azBNsPa1WC4.m3u8/azBNsPa1WC4.m3u8"}, "slug": "koch-snowflake-fractal", "video_id": "azBNsPa1WC4", "youtube_id": "azBNsPa1WC4", "readable_id": "koch-snowflake-fractal"}, "AOsWph2FNLw": {"duration": 700, "path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/generalizing-with-binomial-coefficients-bit-advanced/", "keywords": "probability, combinations", "id": "AOsWph2FNLw", "title": "Generalizing with binomial coefficients (bit advanced)", "description": "Conceptual understanding of where the formula for binomial coefficients come from", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AOsWph2FNLw.mp4/AOsWph2FNLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AOsWph2FNLw.mp4/AOsWph2FNLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AOsWph2FNLw.m3u8/AOsWph2FNLw.m3u8"}, "slug": "generalizing-with-binomial-coefficients-bit-advanced", "video_id": "AOsWph2FNLw", "youtube_id": "AOsWph2FNLw", "readable_id": "generalizing-with-binomial-coefficients-bit-advanced"}, "LrS5_l-gk94": {"duration": 592, "path": "khan/math/geometry/right_triangles_topic/pythagorean_proofs/pythagorean-theorem-proof-using-similarity/", "keywords": "Pythagorean, Theorem, Proof, Using, Similarity", "id": "LrS5_l-gk94", "title": "Pythagorean theorem proof using similarity", "description": "Proof of the Pythagorean Theorem using similarity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LrS5_l-gk94.mp4/LrS5_l-gk94.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LrS5_l-gk94.mp4/LrS5_l-gk94.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LrS5_l-gk94.m3u8/LrS5_l-gk94.m3u8"}, "slug": "pythagorean-theorem-proof-using-similarity", "video_id": "LrS5_l-gk94", "youtube_id": "LrS5_l-gk94", "readable_id": "pythagorean-theorem-proof-using-similarity"}, "twT-WZChfZ8": {"duration": 564, "path": "khan/math/multivariable-calculus/double_triple_integrals/double_integrals/double-integrals-4/", "keywords": "double, integral", "id": "twT-WZChfZ8", "title": "Double integrals 4", "description": "Another way to conceptualize the double integral.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/twT-WZChfZ8.mp4/twT-WZChfZ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/twT-WZChfZ8.mp4/twT-WZChfZ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/twT-WZChfZ8.m3u8/twT-WZChfZ8.m3u8"}, "slug": "double-integrals-4", "video_id": "twT-WZChfZ8", "youtube_id": "twT-WZChfZ8", "readable_id": "double-integrals-4"}, "GEeKOeGHddY": {"duration": 265, "path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/multiply-and-simplify-a-radical-expression-1/", "keywords": "u16_l2_t1_we1, Multiply, and, Simply, Radical, Expression", "id": "GEeKOeGHddY", "title": "How to simplify a product of two variable cube root expressions (example)", "description": "Sal shows how to simplify 5\u221b(2x^2)*3\u221b(4x^4).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GEeKOeGHddY.mp4/GEeKOeGHddY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GEeKOeGHddY.mp4/GEeKOeGHddY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GEeKOeGHddY.m3u8/GEeKOeGHddY.m3u8"}, "slug": "multiply-and-simplify-a-radical-expression-1", "video_id": "GEeKOeGHddY", "youtube_id": "GEeKOeGHddY", "readable_id": "multiply-and-simplify-a-radical-expression-1"}, "Gst4ys6eusM": {"duration": 293, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-16/", "keywords": "", "id": "Gst4ys6eusM", "title": "16 Compound inequality with absolute value", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Gst4ys6eusM.mp4/Gst4ys6eusM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Gst4ys6eusM.mp4/Gst4ys6eusM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Gst4ys6eusM.m3u8/Gst4ys6eusM.m3u8"}, "slug": "2013-sat-practice-6-16", "video_id": "Gst4ys6eusM", "youtube_id": "Gst4ys6eusM", "readable_id": "2013-sat-practice-6-16"}, "vC-cEWJxDRY": {"duration": 380, "path": "khan/science/biology/structure-of-a-cell/tour-of-organelles/endomembrane-system/", "keywords": "education,online learning,learning,lessons,endoplasmic reticulum,Golgi,endomembrane,eukaryotic,lipid bilayer", "id": "vC-cEWJxDRY", "title": "Endomembrane system", "description": "An overview of how the cellular membrane, nuclear membranes, endoplasmic reticulum, Golgi apparatus and other membrane-bound structures collectively form the endomembrane system in eukaryotic cells.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vC-cEWJxDRY.mp4/vC-cEWJxDRY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vC-cEWJxDRY.mp4/vC-cEWJxDRY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vC-cEWJxDRY.m3u8/vC-cEWJxDRY.m3u8"}, "slug": "endomembrane-system", "video_id": "vC-cEWJxDRY", "youtube_id": "vC-cEWJxDRY", "readable_id": "endomembrane-system"}, "Qc9VsH11nzk": {"duration": 52, "path": "khan/science/discoveries-projects/discoveries/electrostatics/discovery-of-electrostatics/", "keywords": "electrostatics", "id": "Qc9VsH11nzk", "title": "Discovery of triboelectric effect", "description": "Our ancestors noticed that when amber was rubbed against fur it attracted small objects...why is this?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qc9VsH11nzk.mp4/Qc9VsH11nzk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qc9VsH11nzk.mp4/Qc9VsH11nzk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qc9VsH11nzk.m3u8/Qc9VsH11nzk.m3u8"}, "slug": "discovery-of-electrostatics", "video_id": "Qc9VsH11nzk", "youtube_id": "Qc9VsH11nzk", "readable_id": "discovery-of-electrostatics"}, "zqGvUbvVQXg": {"duration": 535, "path": "khan/test-prep/mcat/physical-processes/electrostatics-1/voltage/", "keywords": "volts, voltage", "id": "zqGvUbvVQXg", "title": "Voltage", "description": "Difference between electrical potential (voltage) and electrical potential energy", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zqGvUbvVQXg.mp4/zqGvUbvVQXg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zqGvUbvVQXg.mp4/zqGvUbvVQXg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zqGvUbvVQXg.m3u8/zqGvUbvVQXg.m3u8"}, "slug": "voltage", "video_id": "zqGvUbvVQXg", "youtube_id": "zqGvUbvVQXg", "readable_id": "voltage"}, "XMwnJUprid8": {"duration": 197, "path": "khan/math/pre-algebra/order-of-operations/arithmetic_properties/inverse-property-of-multiplication/", "keywords": "Inverse, Property, of, Multiplication", "id": "XMwnJUprid8", "title": "Inverse property of multiplication", "description": "Simple idea that multiplying by a numbers multiplicative inverse gets you back to one", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XMwnJUprid8.mp4/XMwnJUprid8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XMwnJUprid8.mp4/XMwnJUprid8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XMwnJUprid8.m3u8/XMwnJUprid8.m3u8"}, "slug": "inverse-property-of-multiplication", "video_id": "XMwnJUprid8", "youtube_id": "XMwnJUprid8", "readable_id": "inverse-property-of-multiplication"}, "Fp7d-NmKN5M": {"duration": 90, "path": "khan/college-admissions/making-high-school-count/standardized-tests/facing-the-standardized-tests/", "keywords": "", "id": "Fp7d-NmKN5M", "title": "Facing the standardized tests", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Fp7d-NmKN5M.mp4/Fp7d-NmKN5M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Fp7d-NmKN5M.mp4/Fp7d-NmKN5M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Fp7d-NmKN5M.m3u8/Fp7d-NmKN5M.m3u8"}, "slug": "facing-the-standardized-tests", "video_id": "Fp7d-NmKN5M", "youtube_id": "Fp7d-NmKN5M", "readable_id": "facing-the-standardized-tests"}, "uUhBEufepWk": {"duration": 239, "path": "khan/test-prep/mcat/physical-processes/current-and-resistance/electrolytic-conductivity/", "keywords": "", "id": "uUhBEufepWk", "title": "Electrolytic conductivity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uUhBEufepWk.mp4/uUhBEufepWk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uUhBEufepWk.mp4/uUhBEufepWk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uUhBEufepWk.m3u8/uUhBEufepWk.m3u8"}, "slug": "electrolytic-conductivity", "video_id": "uUhBEufepWk", "youtube_id": "uUhBEufepWk", "readable_id": "electrolytic-conductivity"}, "okXVhDMuGFg": {"duration": 588, "path": "khan/math/algebra2/conics_precalc/parabolas_precalc/equation-for-parabola-from-focus-and-directrix/", "keywords": "", "id": "okXVhDMuGFg", "title": "Equation for parabola from focus and directrix", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/okXVhDMuGFg.mp4/okXVhDMuGFg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/okXVhDMuGFg.mp4/okXVhDMuGFg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/okXVhDMuGFg.m3u8/okXVhDMuGFg.m3u8"}, "slug": "equation-for-parabola-from-focus-and-directrix", "video_id": "okXVhDMuGFg", "youtube_id": "okXVhDMuGFg", "readable_id": "equation-for-parabola-from-focus-and-directrix"}, "yAQSucmHrAk": {"duration": 373, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/seismic-waves-tutorial/the-mohorovicic-seismic-discontinuity/", "keywords": "geology, seismology, moho", "id": "yAQSucmHrAk", "title": "The mohorovicic seismic discontinuity", "description": "The Mohorovicic Seismic Discontinuity- boundary between crust and mantle (or Moho)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yAQSucmHrAk.mp4/yAQSucmHrAk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yAQSucmHrAk.mp4/yAQSucmHrAk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yAQSucmHrAk.m3u8/yAQSucmHrAk.m3u8"}, "slug": "the-mohorovicic-seismic-discontinuity", "video_id": "yAQSucmHrAk", "youtube_id": "yAQSucmHrAk", "readable_id": "the-mohorovicic-seismic-discontinuity"}, "i6LY9q9UIas": {"duration": 265, "path": "khan/test-prep/mcat/processing-the-environment/memory/retrieval-free-recall-cued-recall-and-recognition/", "keywords": "", "id": "i6LY9q9UIas", "title": "Retrieval: Free recall, cued recall, and recognition", "description": "Learn about three types of retrieval: free recall, cued recall, and recognition.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i6LY9q9UIas.mp4/i6LY9q9UIas.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i6LY9q9UIas.mp4/i6LY9q9UIas.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i6LY9q9UIas.m3u8/i6LY9q9UIas.m3u8"}, "slug": "retrieval-free-recall-cued-recall-and-recognition", "video_id": "i6LY9q9UIas", "youtube_id": "i6LY9q9UIas", "readable_id": "retrieval-free-recall-cued-recall-and-recognition"}, "C2PC9185gIw": {"duration": 789, "path": "khan/math/linear-algebra/alternate_bases/eigen_everything/linear-algebra-showing-that-an-eigenbasis-makes-for-good-coordinate-systems/", "keywords": "eigenbasis, eigenvector", "id": "C2PC9185gIw", "title": "Showing that an eigenbasis makes for good coordinate systems", "description": "Showing that an eigenbasis makes for good coordinate systems", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C2PC9185gIw.mp4/C2PC9185gIw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C2PC9185gIw.mp4/C2PC9185gIw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C2PC9185gIw.m3u8/C2PC9185gIw.m3u8"}, "slug": "linear-algebra-showing-that-an-eigenbasis-makes-for-good-coordinate-systems", "video_id": "C2PC9185gIw", "youtube_id": "C2PC9185gIw", "readable_id": "linear-algebra-showing-that-an-eigenbasis-makes-for-good-coordinate-systems"}, "dAOWQC-OBv0": {"duration": 740, "path": "khan/test-prep/mcat/behavior/human-development/early-embryogenesis-cleavage-blastulation-gastrulation-and-neurulation/", "keywords": "", "id": "dAOWQC-OBv0", "title": "Early embryogenesis - Cleavage, blastulation, gastrulation, and neurulation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dAOWQC-OBv0.mp4/dAOWQC-OBv0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dAOWQC-OBv0.mp4/dAOWQC-OBv0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dAOWQC-OBv0.m3u8/dAOWQC-OBv0.m3u8"}, "slug": "early-embryogenesis-cleavage-blastulation-gastrulation-and-neurulation", "video_id": "dAOWQC-OBv0", "youtube_id": "dAOWQC-OBv0", "readable_id": "early-embryogenesis-cleavage-blastulation-gastrulation-and-neurulation"}, "TcIDXqmt74A": {"duration": 738, "path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/difference-of-sample-means-distribution/", "keywords": "Difference, of, Sample, Means, Distribution", "id": "TcIDXqmt74A", "title": "Difference of sample means distribution", "description": "Difference of Sample Means Distribution", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TcIDXqmt74A.mp4/TcIDXqmt74A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TcIDXqmt74A.mp4/TcIDXqmt74A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TcIDXqmt74A.m3u8/TcIDXqmt74A.m3u8"}, "slug": "difference-of-sample-means-distribution", "video_id": "TcIDXqmt74A", "youtube_id": "TcIDXqmt74A", "readable_id": "difference-of-sample-means-distribution"}, "njb6xYF0GZ0": {"duration": 301, "path": "khan/math/algebra/systems-of-linear-equations/systems-of-linear-equations-word-problems/system-with-not-enough-information/", "keywords": "education,online learning,learning,lessons", "id": "njb6xYF0GZ0", "title": "How to solve a word problem about a system of equations with infinite solutions (example)", "description": "Sal answers a word problem about a vegetable farmer and finds that it has infinite solutions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/njb6xYF0GZ0.mp4/njb6xYF0GZ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/njb6xYF0GZ0.mp4/njb6xYF0GZ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/njb6xYF0GZ0.m3u8/njb6xYF0GZ0.m3u8"}, "slug": "system-with-not-enough-information", "video_id": "njb6xYF0GZ0", "youtube_id": "njb6xYF0GZ0", "readable_id": "system-with-not-enough-information"}, "5YaSL-y46Hk": {"duration": 224, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/contango-and-backwardation-review/", "keywords": "contango, backwardation, normal, theory", "id": "5YaSL-y46Hk", "title": "Contango and backwardation review", "description": "Review of the difference uses of the words contango, backwardation, contango theory and theory of normal backwardation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5YaSL-y46Hk.mp4/5YaSL-y46Hk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5YaSL-y46Hk.mp4/5YaSL-y46Hk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5YaSL-y46Hk.m3u8/5YaSL-y46Hk.m3u8"}, "slug": "contango-and-backwardation-review", "video_id": "5YaSL-y46Hk", "youtube_id": "5YaSL-y46Hk", "readable_id": "contango-and-backwardation-review"}, "U9dGHwsewNk": {"duration": 562, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/elimination-reactions-tutorial/e1-reactions/", "keywords": "E1, Reactions, Elimination, Organic, Chemistry", "id": "U9dGHwsewNk", "title": "E1 reactions", "description": "E1 Elimination Reactions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U9dGHwsewNk.mp4/U9dGHwsewNk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U9dGHwsewNk.mp4/U9dGHwsewNk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U9dGHwsewNk.m3u8/U9dGHwsewNk.m3u8"}, "slug": "e1-reactions", "video_id": "U9dGHwsewNk", "youtube_id": "U9dGHwsewNk", "readable_id": "e1-reactions"}, "Ve99biD1KtA": {"duration": 1085, "path": "khan/math/differential-calculus/limits_topic/squeeze_theorem/proof-lim-sin-x-x/", "keywords": "calculus, limit, squeeze, sin", "id": "Ve99biD1KtA", "title": "Proof: lim (sin x)/x", "description": "Using the squeeze theorem to prove that the limit as x approaches 0 of (sin x)/x =1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ve99biD1KtA.mp4/Ve99biD1KtA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ve99biD1KtA.mp4/Ve99biD1KtA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ve99biD1KtA.m3u8/Ve99biD1KtA.m3u8"}, "slug": "proof-lim-sin-x-x", "video_id": "Ve99biD1KtA", "youtube_id": "Ve99biD1KtA", "readable_id": "proof-lim-sin-x-x"}, "1bj7FPzUiWc": {"duration": 713, "path": "khan/test-prep/gmat/problem-solving/gmat-math-39/", "keywords": "gmat, math, problem, solving", "id": "1bj7FPzUiWc", "title": "GMAT: Math 39", "description": "195-197, pgs. 178-179", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1bj7FPzUiWc.mp4/1bj7FPzUiWc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1bj7FPzUiWc.mp4/1bj7FPzUiWc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1bj7FPzUiWc.m3u8/1bj7FPzUiWc.m3u8"}, "slug": "gmat-math-39", "video_id": "1bj7FPzUiWc", "youtube_id": "1bj7FPzUiWc", "readable_id": "gmat-math-39"}, "sg7drNK_vZ0": {"duration": 580, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p1-harder/", "keywords": "", "id": "sg7drNK_vZ0", "title": "Quadratic and exponential word problems \u2014 Harder example", "description": "Watch Sal work through a harder Quadratic and exponential word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sg7drNK_vZ0.mp4/sg7drNK_vZ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sg7drNK_vZ0.mp4/sg7drNK_vZ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sg7drNK_vZ0.m3u8/sg7drNK_vZ0.m3u8"}, "slug": "sat-math-p1-harder", "video_id": "sg7drNK_vZ0", "youtube_id": "sg7drNK_vZ0", "readable_id": "sat-math-p1-harder"}, "BqXS0liFvDc": {"duration": 240, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q10-easier/", "keywords": "", "id": "BqXS0liFvDc", "title": "Data collection and conclusions \u2014 Basic example", "description": "Watch Sal work through a basic Data collections and conclusions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BqXS0liFvDc.mp4/BqXS0liFvDc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BqXS0liFvDc.mp4/BqXS0liFvDc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BqXS0liFvDc.m3u8/BqXS0liFvDc.m3u8"}, "slug": "sat-math-q10-easier", "video_id": "BqXS0liFvDc", "youtube_id": "BqXS0liFvDc", "readable_id": "sat-math-q10-easier"}, "EC2mgUZyzoA": {"duration": 595, "path": "khan/math/precalculus/precalc-matrices/matrix-equations/matrix-equations-systems/", "keywords": "", "id": "EC2mgUZyzoA", "title": "Matrix equations and systems", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EC2mgUZyzoA.mp4/EC2mgUZyzoA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EC2mgUZyzoA.mp4/EC2mgUZyzoA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EC2mgUZyzoA.m3u8/EC2mgUZyzoA.m3u8"}, "slug": "matrix-equations-systems", "video_id": "EC2mgUZyzoA", "youtube_id": "EC2mgUZyzoA", "readable_id": "matrix-equations-systems"}, "m0SFJt_0v28": {"duration": 273, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/electrodes-and-voltage-of-galvanic-cell/", "keywords": "", "id": "m0SFJt_0v28", "title": "Electrodes and voltage of Galvanic cell", "description": "Identifying the anode and cathode in a galvanic cell, and calculating the voltage using standard electrode potentials.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m0SFJt_0v28.mp4/m0SFJt_0v28.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m0SFJt_0v28.mp4/m0SFJt_0v28.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m0SFJt_0v28.m3u8/m0SFJt_0v28.m3u8"}, "slug": "electrodes-and-voltage-of-galvanic-cell", "video_id": "m0SFJt_0v28", "youtube_id": "m0SFJt_0v28", "readable_id": "electrodes-and-voltage-of-galvanic-cell"}, "3z-M6sbGIZ0": {"duration": 661, "path": "khan/math/probability/random-variables-topic/poisson_process/poisson-process-1/", "keywords": "probability, poisson, process, distribution", "id": "3z-M6sbGIZ0", "title": "Poisson process 1", "description": "Introduction to Poisson Processes and the Poisson Distribution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3z-M6sbGIZ0.mp4/3z-M6sbGIZ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3z-M6sbGIZ0.mp4/3z-M6sbGIZ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3z-M6sbGIZ0.m3u8/3z-M6sbGIZ0.m3u8"}, "slug": "poisson-process-1", "video_id": "3z-M6sbGIZ0", "youtube_id": "3z-M6sbGIZ0", "readable_id": "poisson-process-1"}, "Yc9NJnx58Wg": {"duration": 260, "path": "khan/test-prep/ap-art-history/africa-ap/olowe-veranda/", "keywords": "olowe,Olowe of Ise,Veranda Post,AP art history,Africa (Continent),Yoruba People (Ethnicity),Nigeria (Country),Sculpture (Visual Art Form),art,Wood (Visual Art Medium)", "id": "Yc9NJnx58Wg", "title": "Olowe of Ise, Veranda Post (Yoruba people)", "description": "Olowe of Ise, Veranda Post, before 1938 (Yoruba people, Nigeria), wood, pigment, 180.3 x 28.6 x 35.6 cm (The Metropolitan Museum of Art) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Yc9NJnx58Wg.mp4/Yc9NJnx58Wg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Yc9NJnx58Wg.mp4/Yc9NJnx58Wg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Yc9NJnx58Wg.m3u8/Yc9NJnx58Wg.m3u8"}, "slug": "olowe-veranda", "video_id": "Yc9NJnx58Wg", "youtube_id": "Yc9NJnx58Wg", "readable_id": "olowe-veranda"}, "9ThXDY9Y3oU": {"duration": 557, "path": "khan/math/geometry/similarity/triangle_similarlity/similar-triangle-basics/", "keywords": "geometry", "id": "9ThXDY9Y3oU", "title": "Similar triangle basics", "description": "Introduction to what it means for triangles to be similar", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9ThXDY9Y3oU.mp4/9ThXDY9Y3oU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9ThXDY9Y3oU.mp4/9ThXDY9Y3oU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9ThXDY9Y3oU.m3u8/9ThXDY9Y3oU.m3u8"}, "slug": "similar-triangle-basics", "video_id": "9ThXDY9Y3oU", "youtube_id": "9ThXDY9Y3oU", "readable_id": "similar-triangle-basics"}, "JbfVrwxuPxM": {"duration": 285, "path": "khan/math/integral-calculus/indefinite-definite-integrals/definite_integrals/connecting-the-first-and-second-fundamental-theorems-of-calculus/", "keywords": "", "id": "JbfVrwxuPxM", "title": "Connecting the first and second fundamental theorems of calculus", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JbfVrwxuPxM.mp4/JbfVrwxuPxM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JbfVrwxuPxM.mp4/JbfVrwxuPxM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JbfVrwxuPxM.m3u8/JbfVrwxuPxM.m3u8"}, "slug": "connecting-the-first-and-second-fundamental-theorems-of-calculus", "video_id": "JbfVrwxuPxM", "youtube_id": "JbfVrwxuPxM", "readable_id": "connecting-the-first-and-second-fundamental-theorems-of-calculus"}, "D5ymMYcLtv0": {"duration": 1516, "path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/punnett-square-fun/", "keywords": "biology, heredity, genetics, genotype, phenotype, dominant, recessive", "id": "D5ymMYcLtv0", "title": "Punnett square fun", "description": "Dihybrid crosses. Independent assortment. Incomplete dominance. Codominance and multiple alleles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D5ymMYcLtv0.mp4/D5ymMYcLtv0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D5ymMYcLtv0.mp4/D5ymMYcLtv0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D5ymMYcLtv0.m3u8/D5ymMYcLtv0.m3u8"}, "slug": "punnett-square-fun", "video_id": "D5ymMYcLtv0", "youtube_id": "D5ymMYcLtv0", "readable_id": "punnett-square-fun"}, "VMwa6yC3r-s": {"duration": 611, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/bloodvessels/layers-of-a-blood-vessel/", "keywords": "", "id": "VMwa6yC3r-s", "title": "Layers of a blood vessel", "description": "Remember the 3 key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are all different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VMwa6yC3r-s.mp4/VMwa6yC3r-s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VMwa6yC3r-s.mp4/VMwa6yC3r-s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VMwa6yC3r-s.m3u8/VMwa6yC3r-s.m3u8"}, "slug": "layers-of-a-blood-vessel", "video_id": "VMwa6yC3r-s", "youtube_id": "VMwa6yC3r-s", "readable_id": "layers-of-a-blood-vessel"}, "ViAmQivKif0": {"duration": 1060, "path": "khan/test-prep/mcat/chemical-processes/thermochemistry/gibbs-free-energy-and-spontaneity/", "keywords": "gibbs, free, energy, chemistry, thermodynamics", "id": "ViAmQivKif0", "title": "Gibbs free energy and spontaneity", "description": "Intuition behind why spontaneity is driven by enthalpy, entropy and temperature. Introduction to Gibbs free energy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ViAmQivKif0.mp4/ViAmQivKif0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ViAmQivKif0.mp4/ViAmQivKif0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ViAmQivKif0.m3u8/ViAmQivKif0.m3u8"}, "slug": "gibbs-free-energy-and-spontaneity", "video_id": "ViAmQivKif0", "youtube_id": "ViAmQivKif0", "readable_id": "gibbs-free-energy-and-spontaneity"}, "5CeBlu260Rw": {"duration": 307, "path": "khan/math/geometry/basic-geometry/area_non_standard/quadrilateral-properties/", "keywords": "u07_l2_t1_we1, Quadrilateral, Properties", "id": "5CeBlu260Rw", "title": "Quadrilateral properties", "description": "How about this: we are given a 4-sided shape and asked to determine whether its properties qualify it to be called a quadrilateral (or category of quadrilaterals). Check it out.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5CeBlu260Rw.mp4/5CeBlu260Rw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5CeBlu260Rw.mp4/5CeBlu260Rw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5CeBlu260Rw.m3u8/5CeBlu260Rw.m3u8"}, "slug": "quadrilateral-properties", "video_id": "5CeBlu260Rw", "youtube_id": "5CeBlu260Rw", "readable_id": "quadrilateral-properties"}, "ao9cx8JlJIU": {"duration": 112, "path": "khan/math/algebra/introduction-to-algebra/writing-expressions-tutorial/interpreting-linear-expressions-example/", "keywords": "", "id": "ao9cx8JlJIU", "title": "Interpreting linear expressions, 1", "description": "We match the expressions to their meaning in this example. We're reinforcing our knowledge of linear expressions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ao9cx8JlJIU.mp4/ao9cx8JlJIU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ao9cx8JlJIU.mp4/ao9cx8JlJIU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ao9cx8JlJIU.m3u8/ao9cx8JlJIU.m3u8"}, "slug": "interpreting-linear-expressions-example", "video_id": "ao9cx8JlJIU", "youtube_id": "ao9cx8JlJIU", "readable_id": "interpreting-linear-expressions-example"}, "FEYN0jK1-pI": {"duration": 645, "path": "khan/test-prep/gmat/problem-solving/gmat-math-35/", "keywords": "gmat, math, problem, solving", "id": "FEYN0jK1-pI", "title": "GMAT: Math 35", "description": "177-180, pg. 176", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FEYN0jK1-pI.mp4/FEYN0jK1-pI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FEYN0jK1-pI.mp4/FEYN0jK1-pI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FEYN0jK1-pI.m3u8/FEYN0jK1-pI.m3u8"}, "slug": "gmat-math-35", "video_id": "FEYN0jK1-pI", "youtube_id": "FEYN0jK1-pI", "readable_id": "gmat-math-35"}, "_qzs1zozTBo": {"duration": 263, "path": "khan/math/pre-algebra/order-of-operations/rounding_whole_numbers/rounding-whole-numbers-1/", "keywords": "U01_L1_T2_we1, Rounding, Whole, Numbers, CC_3_NBT_1, CC_3_OA_8, CC_4_NBT_3, CC_4_OA_3", "id": "_qzs1zozTBo", "title": "Rounding whole numbers example 1", "description": "Here's a whole numbers rounding exercise. Let's do this example together.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_qzs1zozTBo.mp4/_qzs1zozTBo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_qzs1zozTBo.mp4/_qzs1zozTBo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_qzs1zozTBo.m3u8/_qzs1zozTBo.m3u8"}, "slug": "rounding-whole-numbers-1", "video_id": "_qzs1zozTBo", "youtube_id": "_qzs1zozTBo", "readable_id": "rounding-whole-numbers-1"}, "qv7DM5Ph0vU": {"duration": 232, "path": "khan/math/integral-calculus/indefinite-definite-integrals/improper-integrals-tutorial/introduction-to-improper-integrals/", "keywords": "", "id": "qv7DM5Ph0vU", "title": "Introduction to improper integrals", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qv7DM5Ph0vU.mp4/qv7DM5Ph0vU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qv7DM5Ph0vU.mp4/qv7DM5Ph0vU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qv7DM5Ph0vU.m3u8/qv7DM5Ph0vU.m3u8"}, "slug": "introduction-to-improper-integrals", "video_id": "qv7DM5Ph0vU", "youtube_id": "qv7DM5Ph0vU", "readable_id": "introduction-to-improper-integrals"}, "286FiUvOeFs": {"duration": 816, "path": "khan/humanities/art-1010/early-abstraction/cubism/picasso-still-life-with-chair-caning-1912/", "keywords": "picasso, Still-Life, Smarthistory, Art History", "id": "286FiUvOeFs", "title": "Picasso, Still Life with Chair Caning", "description": "Picasso, Still-Life with Chair Caning, 1912 (Mus\u00e9e Picasso)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/286FiUvOeFs.mp4/286FiUvOeFs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/286FiUvOeFs.mp4/286FiUvOeFs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/286FiUvOeFs.m3u8/286FiUvOeFs.m3u8"}, "slug": "picasso-still-life-with-chair-caning-1912", "video_id": "286FiUvOeFs", "youtube_id": "286FiUvOeFs", "readable_id": "picasso-still-life-with-chair-caning-1912"}, "psyWUUkI-aw": {"duration": 172, "path": "khan/math/pre-algebra/fractions-pre-alg/number-sets-pre-alg/number-sets-3/", "keywords": "U12_L1_T1_we3, Number, Sets, CC_6_NS_6, CC_6_NS_6_c, CC_8_NS_1", "id": "psyWUUkI-aw", "title": "Number sets 3", "description": "Number Sets 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/psyWUUkI-aw.mp4/psyWUUkI-aw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/psyWUUkI-aw.mp4/psyWUUkI-aw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/psyWUUkI-aw.m3u8/psyWUUkI-aw.m3u8"}, "slug": "number-sets-3", "video_id": "psyWUUkI-aw", "youtube_id": "psyWUUkI-aw", "readable_id": "number-sets-3"}, "iCmtnhPs7TI": {"duration": 274, "path": "khan/humanities/global-culture/global-art-architecture/michael-rakowitz/", "keywords": "Tate", "id": "iCmtnhPs7TI", "title": "Michael Rakowitz on Star Wars and Saddam Hussein", "description": "This video brought to you by\u00a0Tate.org.uk\n\nIn this video, artist Michael Rakowitz explores seemingly implausible connections and contradictions between objects and events. In his 2010 exhibition The worst condition is to pass under a sword which is not one\u2019s own, Rakowitz explores the unexpected links between Western science fiction and fantasy and the design of weapons, uniforms, and monuments under the regime of Saddam Hussein in Iraq.\n\nThe project explores how images and idea from popular culture have become powerful contemporary mythologies, creating a world in which fictional characters coexist with and inform even the most radical historical figures. What kind of effect do these strange juxtapositions have? Could they make an extreme figure more relatable?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iCmtnhPs7TI.mp4/iCmtnhPs7TI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iCmtnhPs7TI.mp4/iCmtnhPs7TI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iCmtnhPs7TI.m3u8/iCmtnhPs7TI.m3u8"}, "slug": "michael-rakowitz", "video_id": "iCmtnhPs7TI", "youtube_id": "iCmtnhPs7TI", "readable_id": "michael-rakowitz"}, "soUmhhuF08Y": {"duration": 133, "path": "khan/math/algebra2/functions-and-graphs/new_operators/new-definitions-2/", "keywords": "", "id": "soUmhhuF08Y", "title": "New operator definitions 2", "description": "Worked examples of working with newly defined operators", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/soUmhhuF08Y.mp4/soUmhhuF08Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/soUmhhuF08Y.mp4/soUmhhuF08Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/soUmhhuF08Y.m3u8/soUmhhuF08Y.m3u8"}, "slug": "new-definitions-2", "video_id": "soUmhhuF08Y", "youtube_id": "soUmhhuF08Y", "readable_id": "new-definitions-2"}, "Ph8_diBYnGM": {"duration": 373, "path": "khan/test-prep/mcat/physical-processes/stoichiometry/empirical-formula-from-mass-composition-edited/", "keywords": "", "id": "Ph8_diBYnGM", "title": "Empirical formula from mass composition edited", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ph8_diBYnGM.mp4/Ph8_diBYnGM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ph8_diBYnGM.mp4/Ph8_diBYnGM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ph8_diBYnGM.m3u8/Ph8_diBYnGM.m3u8"}, "slug": "empirical-formula-from-mass-composition-edited", "video_id": "Ph8_diBYnGM", "youtube_id": "Ph8_diBYnGM", "readable_id": "empirical-formula-from-mass-composition-edited"}, "2eLAEMRrR7Q": {"duration": 714, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-15-part-1/", "keywords": "complex, analysis, trigonometry, competition, math", "id": "2eLAEMRrR7Q", "title": "2003 AIME II problem 15 (part 1)", "description": "Finding the sum of the absolute value of the imaginary parts of the square of the roots of a crazy polynomial", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2eLAEMRrR7Q.mp4/2eLAEMRrR7Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2eLAEMRrR7Q.mp4/2eLAEMRrR7Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2eLAEMRrR7Q.m3u8/2eLAEMRrR7Q.m3u8"}, "slug": "2003-aime-ii-problem-15-part-1", "video_id": "2eLAEMRrR7Q", "youtube_id": "2eLAEMRrR7Q", "readable_id": "2003-aime-ii-problem-15-part-1"}, "sBldw95xMD4": {"duration": 465, "path": "khan/math/multivariable-calculus/line_integrals_topic/position_vector_functions/position-vector-valued-functions/", "keywords": "vector, valued, function, line, integral", "id": "sBldw95xMD4", "title": "Position vector valued functions", "description": "Using a position vector valued function to describe a curve or path", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sBldw95xMD4.mp4/sBldw95xMD4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sBldw95xMD4.mp4/sBldw95xMD4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sBldw95xMD4.m3u8/sBldw95xMD4.m3u8"}, "slug": "position-vector-valued-functions", "video_id": "sBldw95xMD4", "youtube_id": "sBldw95xMD4", "readable_id": "position-vector-valued-functions"}, "IyoUWRAharQ": {"duration": 457, "path": "khan/humanities/history/euro-hist/world-war-i-tutorial/empires-before-world-war-i/", "keywords": "", "id": "IyoUWRAharQ", "title": "Empires before World War I", "description": "Austria-Hungary. Ottoman empire. British, German, French and Russian empires.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IyoUWRAharQ.mp4/IyoUWRAharQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IyoUWRAharQ.mp4/IyoUWRAharQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IyoUWRAharQ.m3u8/IyoUWRAharQ.m3u8"}, "slug": "empires-before-world-war-i", "video_id": "IyoUWRAharQ", "youtube_id": "IyoUWRAharQ", "readable_id": "empires-before-world-war-i"}, "GWZKz4F9hWM": {"duration": 261, "path": "khan/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/practice-using-substitution-for-systems/", "keywords": "", "id": "GWZKz4F9hWM", "title": "How to solve a system of linear equations with substitution (example)", "description": "Sal solves the following system of linear equations using substitution: -3x-4y=-2 and y=2x-5.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GWZKz4F9hWM.mp4/GWZKz4F9hWM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GWZKz4F9hWM.mp4/GWZKz4F9hWM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GWZKz4F9hWM.m3u8/GWZKz4F9hWM.m3u8"}, "slug": "practice-using-substitution-for-systems", "video_id": "GWZKz4F9hWM", "youtube_id": "GWZKz4F9hWM", "readable_id": "practice-using-substitution-for-systems"}, "MJBjGnR6vlk": {"duration": 463, "path": "khan/math/trigonometry/trig-function-graphs/modeling-periodic-functions/modeling-periodic-function-with-shift/", "keywords": "", "id": "MJBjGnR6vlk", "title": "Day length in Alaska", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MJBjGnR6vlk.mp4/MJBjGnR6vlk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MJBjGnR6vlk.mp4/MJBjGnR6vlk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MJBjGnR6vlk.m3u8/MJBjGnR6vlk.m3u8"}, "slug": "modeling-periodic-function-with-shift", "video_id": "MJBjGnR6vlk", "youtube_id": "MJBjGnR6vlk", "readable_id": "modeling-periodic-function-with-shift"}, "GAaQ9O-NCoc": {"duration": 82, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q7-easier/", "keywords": "", "id": "GAaQ9O-NCoc", "title": "Table data \u2014 Basic example", "description": "Watch Sal work through a basic Table data problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GAaQ9O-NCoc.mp4/GAaQ9O-NCoc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GAaQ9O-NCoc.mp4/GAaQ9O-NCoc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GAaQ9O-NCoc.m3u8/GAaQ9O-NCoc.m3u8"}, "slug": "sat-math-q7-easier", "video_id": "GAaQ9O-NCoc", "youtube_id": "GAaQ9O-NCoc", "readable_id": "sat-math-q7-easier"}, "WuSuIgiOPqM": {"duration": 604, "path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/what-is-autism-spectrum-disorder/", "keywords": "Spectrum Disorder,Autistic Spectrum Disorders (Disease Or Medical Condition),Mental Illness (Disease Or Medical Condition),Autism (Disease Or Medical Condition),Health (Industry),Medicine (Field Of Study)", "id": "WuSuIgiOPqM", "title": "What is autism spectrum disorder?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WuSuIgiOPqM.mp4/WuSuIgiOPqM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WuSuIgiOPqM.mp4/WuSuIgiOPqM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WuSuIgiOPqM.m3u8/WuSuIgiOPqM.m3u8"}, "slug": "what-is-autism-spectrum-disorder", "video_id": "WuSuIgiOPqM", "youtube_id": "WuSuIgiOPqM", "readable_id": "what-is-autism-spectrum-disorder"}, "Frpq_A7Ky_Q": {"duration": 361, "path": "khan/humanities/history/history-survey/us-history/appomattox-court-house-and-lincoln-s-assassination/", "keywords": "civil, war, history, marquee", "id": "Frpq_A7Ky_Q", "title": "Appomattox court house and Lincoln's assassination", "description": "From Lee's Surrender to Grant to Lincoln's Assassination", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Frpq_A7Ky_Q.mp4/Frpq_A7Ky_Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Frpq_A7Ky_Q.mp4/Frpq_A7Ky_Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Frpq_A7Ky_Q.m3u8/Frpq_A7Ky_Q.m3u8"}, "slug": "appomattox-court-house-and-lincoln-s-assassination", "video_id": "Frpq_A7Ky_Q", "youtube_id": "Frpq_A7Ky_Q", "readable_id": "appomattox-court-house-and-lincoln-s-assassination"}, "2oGsLdAWxlk": {"duration": 366, "path": "khan/math/algebra/two-variable-linear-inequalities/checking-solutions-of-inequalities/graphing-inequalities-1/", "keywords": "u13_l2_t4_we1, Graphing, Inequalities, CC_6_EE_5, CC_39336_A-REI_12", "id": "2oGsLdAWxlk", "title": "How to check a solution of two-variable linear inequality (example)", "description": "Sal determines whether the ordered pairs (3,5) and (1,-7) are solutions of the inequality 5x-3y\u226525. He discussed the problem both algebraically and graphically.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2oGsLdAWxlk.mp4/2oGsLdAWxlk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2oGsLdAWxlk.mp4/2oGsLdAWxlk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2oGsLdAWxlk.m3u8/2oGsLdAWxlk.m3u8"}, "slug": "graphing-inequalities-1", "video_id": "2oGsLdAWxlk", "youtube_id": "2oGsLdAWxlk", "readable_id": "graphing-inequalities-1"}, "tUOKkeEOkXk": {"duration": 478, "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/michelangelo-laurentian-library-1524-71/", "keywords": "Michelangelo, Laurentian, Library, vestibule, reading room, 1524, San Lorenzo, Florence, High Renaissance, Mannerism, architecture", "id": "tUOKkeEOkXk", "title": "Michelangelo, Laurentian Library", "description": "Michelangelo, Laurentian Library (vestibule and reading room), begun 1524, opened 1571, \nSan Lorenzo, Florence", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tUOKkeEOkXk.mp4/tUOKkeEOkXk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tUOKkeEOkXk.mp4/tUOKkeEOkXk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tUOKkeEOkXk.m3u8/tUOKkeEOkXk.m3u8"}, "slug": "michelangelo-laurentian-library-1524-71", "video_id": "tUOKkeEOkXk", "youtube_id": "tUOKkeEOkXk", "readable_id": "michelangelo-laurentian-library-1524-71"}, "c_8QQbVQKU0": {"duration": 604, "path": "khan/test-prep/iit-jee-subject/iit-jee/tangent-line-hyperbola-relationship-very-optional/", "keywords": "hyperbola, tangent, line, conic, section", "id": "c_8QQbVQKU0", "title": "Tangent line hyperbola relationship (very optional)", "description": "How a tangent line relates to a hyperbola. Might be useful for some competitive exams where there isn't time to derive (like we are doing in this video)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/c_8QQbVQKU0.mp4/c_8QQbVQKU0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/c_8QQbVQKU0.mp4/c_8QQbVQKU0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/c_8QQbVQKU0.m3u8/c_8QQbVQKU0.m3u8"}, "slug": "tangent-line-hyperbola-relationship-very-optional", "video_id": "c_8QQbVQKU0", "youtube_id": "c_8QQbVQKU0", "readable_id": "tangent-line-hyperbola-relationship-very-optional"}, "v8ODIMqbQ44": {"duration": 521, "path": "khan/science/physics/forces-newtons-laws/inclined-planes-friction/force-of-friction-keeping-the-block-stationary/", "keywords": "physics, friction, static, coefficient, mechanics, statics", "id": "v8ODIMqbQ44", "title": "Force of friction keeping the block stationary", "description": "Block of wood kept stationary by the force of friction (Correction made in next video)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v8ODIMqbQ44.mp4/v8ODIMqbQ44.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v8ODIMqbQ44.mp4/v8ODIMqbQ44.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v8ODIMqbQ44.m3u8/v8ODIMqbQ44.m3u8"}, "slug": "force-of-friction-keeping-the-block-stationary", "video_id": "v8ODIMqbQ44", "youtube_id": "v8ODIMqbQ44", "readable_id": "force-of-friction-keeping-the-block-stationary"}, "boH4l1SgJbM": {"duration": 449, "path": "khan/math/precalculus/prob_comb/combinations/handshaking-combinations/", "keywords": "", "id": "boH4l1SgJbM", "title": "Handshaking combinations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/boH4l1SgJbM.mp4/boH4l1SgJbM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/boH4l1SgJbM.mp4/boH4l1SgJbM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/boH4l1SgJbM.m3u8/boH4l1SgJbM.m3u8"}, "slug": "handshaking-combinations", "video_id": "boH4l1SgJbM", "youtube_id": "boH4l1SgJbM", "readable_id": "handshaking-combinations"}, "P7LKEkcNibo": {"duration": 429, "path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/deriving-max-projectile-displacement-given-time/", "keywords": "physics, projectile, motion", "id": "P7LKEkcNibo", "title": "Deriving max projectile displacement given time", "description": "Deriving a formula for maximum projectile displacement as a function of elapsed time", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P7LKEkcNibo.mp4/P7LKEkcNibo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P7LKEkcNibo.mp4/P7LKEkcNibo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P7LKEkcNibo.m3u8/P7LKEkcNibo.m3u8"}, "slug": "deriving-max-projectile-displacement-given-time", "video_id": "P7LKEkcNibo", "youtube_id": "P7LKEkcNibo", "readable_id": "deriving-max-projectile-displacement-given-time"}, "HTDop6eEsaA": {"duration": 559, "path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/introduction-to-exponential-decay/", "keywords": "chemistry, radioactive, exponential, decay", "id": "HTDop6eEsaA", "title": "Introduction to exponential decay", "description": "Introduction to Exponential Decay. Using the exponential decay formula to calculate k, calculating the mass of carbon-14 remaining after a given time, and calculating the time it takes to have a specific mass remaining .", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HTDop6eEsaA.mp4/HTDop6eEsaA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HTDop6eEsaA.mp4/HTDop6eEsaA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HTDop6eEsaA.m3u8/HTDop6eEsaA.m3u8"}, "slug": "introduction-to-exponential-decay", "video_id": "HTDop6eEsaA", "youtube_id": "HTDop6eEsaA", "readable_id": "introduction-to-exponential-decay"}, "tqfU9mC2yFU": {"duration": 539, "path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-3/", "keywords": "math, calculus, volume, rotation, disk, solid, revlution, sphere, radius", "id": "tqfU9mC2yFU", "title": "Volume of a sphere", "description": "Figuring out the equation for the volume of a sphere.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tqfU9mC2yFU.mp4/tqfU9mC2yFU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tqfU9mC2yFU.mp4/tqfU9mC2yFU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tqfU9mC2yFU.m3u8/tqfU9mC2yFU.m3u8"}, "slug": "solid-of-revolution-part-3", "video_id": "tqfU9mC2yFU", "youtube_id": "tqfU9mC2yFU", "readable_id": "solid-of-revolution-part-3"}, "CcziDRr5Myc": {"duration": 71, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-classroom/", "keywords": "Bit-zee bot", "id": "CcziDRr5Myc", "title": "Bit-zeeeeeeeeeee", "description": "Bit-zee is a project designed to inspire students to explore math and science. It was created from everyday items (a hair dryer, tap light, alarm clock, digital camera, and a universal remote). See the following link for help with the code https://sites.google.com/site/khanacademyprojects/home", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CcziDRr5Myc.mp4/CcziDRr5Myc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CcziDRr5Myc.mp4/CcziDRr5Myc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CcziDRr5Myc.m3u8/CcziDRr5Myc.m3u8"}, "slug": "bit-zee-classroom", "video_id": "CcziDRr5Myc", "youtube_id": "CcziDRr5Myc", "readable_id": "bit-zee-classroom"}, "M-aktLHDZEA": {"duration": 335, "path": "khan/test-prep/mcat/biomolecules/overview-metabolism/atp-hydrolysis/", "keywords": "", "id": "M-aktLHDZEA", "title": "ATP hydrolysis mechanism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M-aktLHDZEA.mp4/M-aktLHDZEA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M-aktLHDZEA.mp4/M-aktLHDZEA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M-aktLHDZEA.m3u8/M-aktLHDZEA.m3u8"}, "slug": "atp-hydrolysis", "video_id": "M-aktLHDZEA", "youtube_id": "M-aktLHDZEA", "readable_id": "atp-hydrolysis"}, "ZyyuflY5k2k": {"duration": 549, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/mies-van-der-rohe-seagram-building-new-york-city-1958/", "keywords": "Art, History, Mies van der Rohe, Architecture, NYC, Seagram", "id": "ZyyuflY5k2k", "title": "Mies van der Rohe, Seagram Building", "description": "Ludwig Mies van der Rohe, Seagram Building, 375 Park Avenue, New York City (1958) Speakers: Dr. Matthew Postal, Dr. Steven Zucker. Note: In the video we call Le Corbusier a French architect, but he was born in Swizerland and became a French citizen in 1930.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZyyuflY5k2k.mp4/ZyyuflY5k2k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZyyuflY5k2k.mp4/ZyyuflY5k2k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZyyuflY5k2k.m3u8/ZyyuflY5k2k.m3u8"}, "slug": "mies-van-der-rohe-seagram-building-new-york-city-1958", "video_id": "ZyyuflY5k2k", "youtube_id": "ZyyuflY5k2k", "readable_id": "mies-van-der-rohe-seagram-building-new-york-city-1958"}, "Bkkk0RLSEy8": {"duration": 214, "path": "khan/math/differential-calculus/taking-derivatives/product_rule/product-rule-for-more-than-two-functions/", "keywords": "", "id": "Bkkk0RLSEy8", "title": "Product rule for more than two functions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Bkkk0RLSEy8.mp4/Bkkk0RLSEy8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Bkkk0RLSEy8.mp4/Bkkk0RLSEy8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Bkkk0RLSEy8.m3u8/Bkkk0RLSEy8.m3u8"}, "slug": "product-rule-for-more-than-two-functions", "video_id": "Bkkk0RLSEy8", "youtube_id": "Bkkk0RLSEy8", "readable_id": "product-rule-for-more-than-two-functions"}, "Oa6dezr0JkE": {"duration": 538, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/extrapulmonary-tb-part-1/", "keywords": "", "id": "Oa6dezr0JkE", "title": "Extrapulmonary TB (part 1)", "description": "Learn about how TB can spread beyond your lungs.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Oa6dezr0JkE.mp4/Oa6dezr0JkE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Oa6dezr0JkE.mp4/Oa6dezr0JkE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Oa6dezr0JkE.m3u8/Oa6dezr0JkE.m3u8"}, "slug": "extrapulmonary-tb-part-1", "video_id": "Oa6dezr0JkE", "youtube_id": "Oa6dezr0JkE", "readable_id": "extrapulmonary-tb-part-1"}, "2r95ZVqAysQ": {"duration": 354, "path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/gout-pathophysiology/", "keywords": "", "id": "2r95ZVqAysQ", "title": "Gout pathophysiology", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2r95ZVqAysQ.mp4/2r95ZVqAysQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2r95ZVqAysQ.mp4/2r95ZVqAysQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2r95ZVqAysQ.m3u8/2r95ZVqAysQ.m3u8"}, "slug": "gout-pathophysiology", "video_id": "2r95ZVqAysQ", "youtube_id": "2r95ZVqAysQ", "readable_id": "gout-pathophysiology"}, "rrAKZWfhzrE": {"duration": 100, "path": "khan/science/discoveries-projects/projectile_launcher/ping-pong-ball-launcher-introduction/", "keywords": "", "id": "rrAKZWfhzrE", "title": "Ping pong ball launcher introduction", "description": "This video highlights the projectile (ping pong ball) launcher", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rrAKZWfhzrE.mp4/rrAKZWfhzrE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rrAKZWfhzrE.mp4/rrAKZWfhzrE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rrAKZWfhzrE.m3u8/rrAKZWfhzrE.m3u8"}, "slug": "ping-pong-ball-launcher-introduction", "video_id": "rrAKZWfhzrE", "youtube_id": "rrAKZWfhzrE", "readable_id": "ping-pong-ball-launcher-introduction"}, "xSeYS3V5di8": {"duration": 273, "path": "khan/math/integral-calculus/integration-techniques/integration-using-trig-identities/integral-of-odd-powered-trig-function-with-u-substitution/", "keywords": "", "id": "xSeYS3V5di8", "title": "Integral of odd powered trig function with u substitution", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xSeYS3V5di8.mp4/xSeYS3V5di8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xSeYS3V5di8.mp4/xSeYS3V5di8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xSeYS3V5di8.m3u8/xSeYS3V5di8.m3u8"}, "slug": "integral-of-odd-powered-trig-function-with-u-substitution", "video_id": "xSeYS3V5di8", "youtube_id": "xSeYS3V5di8", "readable_id": "integral-of-odd-powered-trig-function-with-u-substitution"}, "4Eax48gDg9g": {"duration": 56, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/dividing-monomials/", "keywords": "u11_l2_t5_we1, Dividing, Monomials, CC_6_EE_1, CC_6_EE_2_c, CC_8_EE_1, CC_39336_A-APR_1", "id": "4Eax48gDg9g", "title": "How to simplify a rational expression by canceling common monomial terms (example)", "description": "Sal simplifies (28b^6)/(7b) as 4b^5.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4Eax48gDg9g.mp4/4Eax48gDg9g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4Eax48gDg9g.mp4/4Eax48gDg9g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4Eax48gDg9g.m3u8/4Eax48gDg9g.m3u8"}, "slug": "dividing-monomials", "video_id": "4Eax48gDg9g", "youtube_id": "4Eax48gDg9g", "readable_id": "dividing-monomials"}, "_2pGxgq2D3s": {"duration": 133, "path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-moveblock/", "keywords": "", "id": "_2pGxgq2D3s", "title": "Move block", "description": "Ready, set... start your engines!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_2pGxgq2D3s.mp4/_2pGxgq2D3s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_2pGxgq2D3s.mp4/_2pGxgq2D3s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_2pGxgq2D3s.m3u8/_2pGxgq2D3s.m3u8"}, "slug": "lego-moveblock", "video_id": "_2pGxgq2D3s", "youtube_id": "_2pGxgq2D3s", "readable_id": "lego-moveblock"}, "YE1MwI69ooU": {"duration": 467, "path": "khan/humanities/art-asia/art-japan/kamakura-period/tale-of-the-heike/", "keywords": "", "id": "YE1MwI69ooU", "title": "Tale of the Heike", "description": "Learn about the famous samurai story, the Tale of the Heike and hear an excerpt from the tale. This video include artworks from the Asian Art Museum's collection. Learn more about the Tale of the Heike.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YE1MwI69ooU.mp4/YE1MwI69ooU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YE1MwI69ooU.mp4/YE1MwI69ooU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YE1MwI69ooU.m3u8/YE1MwI69ooU.m3u8"}, "slug": "tale-of-the-heike", "video_id": "YE1MwI69ooU", "youtube_id": "YE1MwI69ooU", "readable_id": "tale-of-the-heike"}, "bV_HSZ_W0nk": {"duration": 823, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-complex-root-probability-part-1/", "keywords": "IIT, JEE, Complex, Root, Probability", "id": "bV_HSZ_W0nk", "title": "IIT JEE complex root probability (part 1)", "description": "2010 Paper 1 problem 31 Math (part 1)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bV_HSZ_W0nk.mp4/bV_HSZ_W0nk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bV_HSZ_W0nk.mp4/bV_HSZ_W0nk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bV_HSZ_W0nk.m3u8/bV_HSZ_W0nk.m3u8"}, "slug": "iit-jee-complex-root-probability-part-1", "video_id": "bV_HSZ_W0nk", "youtube_id": "bV_HSZ_W0nk", "readable_id": "iit-jee-complex-root-probability-part-1"}, "wblW_M_HVQ8": {"duration": 563, "path": "khan/math/precalculus/seq_induction/proof_by_induction/proof-by-induction/", "keywords": "proof, algebra, induction", "id": "wblW_M_HVQ8", "title": "Proof by induction", "description": "Proving an expression for the sum of all positive integers up to and including n by induction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wblW_M_HVQ8.mp4/wblW_M_HVQ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wblW_M_HVQ8.mp4/wblW_M_HVQ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wblW_M_HVQ8.m3u8/wblW_M_HVQ8.m3u8"}, "slug": "proof-by-induction", "video_id": "wblW_M_HVQ8", "youtube_id": "wblW_M_HVQ8", "readable_id": "proof-by-induction"}, "2zS1HiuWPMA": {"duration": 465, "path": "khan/partner-content/wi-phi/metaphys-epistemology/cosmological-argument-part-1/", "keywords": "", "id": "2zS1HiuWPMA", "title": "Religion: Cosmological Argument, Part 1", "description": "Part 1 of a pair. Tim lays out a classic argument for the existence of God, called 'The Cosmological Argument' -- roughly, the idea that something has to explain why the world is the way it is, and that something is God. He distinguishes two versions: the Beginnings Argument, and the Modal Argument. He covers the Beginnings Argument.\n\nSpeaker: Dr. Timothy Yenter, Assistant Professor of Philosophy, University of Mississippi", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2zS1HiuWPMA.mp4/2zS1HiuWPMA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2zS1HiuWPMA.mp4/2zS1HiuWPMA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2zS1HiuWPMA.m3u8/2zS1HiuWPMA.m3u8"}, "slug": "cosmological-argument-part-1", "video_id": "2zS1HiuWPMA", "youtube_id": "2zS1HiuWPMA", "readable_id": "cosmological-argument-part-1"}, "NM0WycKCCDU": {"duration": 429, "path": "khan/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula/formula-mass-composition/", "keywords": "", "id": "NM0WycKCCDU", "title": "Empirical formula from mass composition", "description": "Calculating the empirical formula from the mass percent composition.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NM0WycKCCDU.mp4/NM0WycKCCDU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NM0WycKCCDU.mp4/NM0WycKCCDU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NM0WycKCCDU.m3u8/NM0WycKCCDU.m3u8"}, "slug": "formula-mass-composition", "video_id": "NM0WycKCCDU", "youtube_id": "NM0WycKCCDU", "readable_id": "formula-mass-composition"}, "jjcHZuTGWXk": {"duration": 627, "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/introduction-to-proton-nmr/", "keywords": "", "id": "jjcHZuTGWXk", "title": "Introduction to proton NMR", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jjcHZuTGWXk.mp4/jjcHZuTGWXk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jjcHZuTGWXk.mp4/jjcHZuTGWXk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jjcHZuTGWXk.m3u8/jjcHZuTGWXk.m3u8"}, "slug": "introduction-to-proton-nmr", "video_id": "jjcHZuTGWXk", "youtube_id": "jjcHZuTGWXk", "readable_id": "introduction-to-proton-nmr"}, "nuNfdHNTv9o": {"duration": 380, "path": "khan/humanities/medieval-world/medieval-book/making-medieval-book/making-manuscripts/", "keywords": "", "id": "nuNfdHNTv9o", "title": "Making manuscripts", "description": "An illuminated manuscript is a book written and decorated completely by hand. Such manuscripts were among the most precious objects in medieval and early Renaissance monasteries and courts. Discover how skilled artists and craftspeople created these beautiful illuminated masterpieces. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nuNfdHNTv9o.mp4/nuNfdHNTv9o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nuNfdHNTv9o.mp4/nuNfdHNTv9o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nuNfdHNTv9o.m3u8/nuNfdHNTv9o.m3u8"}, "slug": "making-manuscripts", "video_id": "nuNfdHNTv9o", "youtube_id": "nuNfdHNTv9o", "readable_id": "making-manuscripts"}, "WdPMdGUeYGk": {"duration": 133, "path": "khan/humanities/art-1010/early-abstraction/expressionism1/kandinsky-sounds/", "keywords": "", "id": "WdPMdGUeYGk", "title": "Vasily Kandinsky, \"Kl\u00e4nge (Sounds)\"", "description": "To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945 or Pigment to Pixel: Color in Modern and Contemporary Art.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WdPMdGUeYGk.mp4/WdPMdGUeYGk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WdPMdGUeYGk.mp4/WdPMdGUeYGk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WdPMdGUeYGk.m3u8/WdPMdGUeYGk.m3u8"}, "slug": "kandinsky-sounds", "video_id": "WdPMdGUeYGk", "youtube_id": "WdPMdGUeYGk", "readable_id": "kandinsky-sounds"}, "YnYknwUqaCM": {"duration": 262, "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/paolo-veronese-the-family-of-darius-before-alexander-1565-67/", "keywords": "Veronese, Darius, GAP, Alexander the Great, Venice, Venetian Painting, National, Gallery, London, diplomacy, Khan Academy, smarthistory, art history, Google Art Project, OER, painting, renaissance", "id": "YnYknwUqaCM", "title": "Veronese, The Family of Darius Before Alexander", "description": "Paolo Veronese, The Family of Darius before Alexander, 1565-67, oil on canvas, 236.2 x 474.9 cm (The National Gallery, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YnYknwUqaCM.mp4/YnYknwUqaCM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YnYknwUqaCM.mp4/YnYknwUqaCM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YnYknwUqaCM.m3u8/YnYknwUqaCM.m3u8"}, "slug": "paolo-veronese-the-family-of-darius-before-alexander-1565-67", "video_id": "YnYknwUqaCM", "youtube_id": "YnYknwUqaCM", "readable_id": "paolo-veronese-the-family-of-darius-before-alexander-1565-67"}, "FVSgVMVZZ-4": {"duration": 671, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-more-on-congruent-and-similar-triangles/", "keywords": "geometry, similar, congruent, triangles", "id": "FVSgVMVZZ-4", "title": "CA Geometry: More on congruent and similar triangles", "description": "17-20, more similar and congruent triangles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FVSgVMVZZ-4.mp4/FVSgVMVZZ-4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FVSgVMVZZ-4.mp4/FVSgVMVZZ-4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FVSgVMVZZ-4.m3u8/FVSgVMVZZ-4.m3u8"}, "slug": "ca-geometry-more-on-congruent-and-similar-triangles", "video_id": "FVSgVMVZZ-4", "youtube_id": "FVSgVMVZZ-4", "readable_id": "ca-geometry-more-on-congruent-and-similar-triangles"}, "BHTMuHvmarU": {"duration": 626, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/credit-card-interest/payday-loans/", "keywords": "payday, lending, loans", "id": "BHTMuHvmarU", "title": "Payday loans", "description": "How Payday lending works", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BHTMuHvmarU.mp4/BHTMuHvmarU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BHTMuHvmarU.mp4/BHTMuHvmarU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BHTMuHvmarU.m3u8/BHTMuHvmarU.m3u8"}, "slug": "payday-loans", "video_id": "BHTMuHvmarU", "youtube_id": "BHTMuHvmarU", "readable_id": "payday-loans"}, "NSSoMafbBqQ": {"duration": 262, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/life-insurance/term-life-insurance-and-death-probability/", "keywords": "term, life, insurance", "id": "NSSoMafbBqQ", "title": "Term life insurance and death probability", "description": "Understanding an insurance company's sense of my chances of dying.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NSSoMafbBqQ.mp4/NSSoMafbBqQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NSSoMafbBqQ.mp4/NSSoMafbBqQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NSSoMafbBqQ.m3u8/NSSoMafbBqQ.m3u8"}, "slug": "term-life-insurance-and-death-probability", "video_id": "NSSoMafbBqQ", "youtube_id": "NSSoMafbBqQ", "readable_id": "term-life-insurance-and-death-probability"}, "kMACjCg9r4E": {"duration": 635, "path": "khan/humanities/becoming-modern/avant-garde-france/realism/douard-manet-a-bar-at-the-folies-berg-re-1882/", "keywords": "\u00c9douard Manet, Folies-Bergere, Courtauld, Smarthistory, Impressionism, French painting", "id": "kMACjCg9r4E", "title": "Manet, A Bar at the Folies-Berg\u00e8re", "description": "\u00c9douard Manet, A Bar at the Folies-Berg\u00e8re, 1882 (Courtauld Gallery, London) \n\nSpeakers: Beth Harris and Steven Zucker\n\nFor more videos see www.smarthistory.org", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kMACjCg9r4E.mp4/kMACjCg9r4E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kMACjCg9r4E.mp4/kMACjCg9r4E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kMACjCg9r4E.m3u8/kMACjCg9r4E.m3u8"}, "slug": "douard-manet-a-bar-at-the-folies-berg-re-1882", "video_id": "kMACjCg9r4E", "youtube_id": "kMACjCg9r4E", "readable_id": "douard-manet-a-bar-at-the-folies-berg-re-1882"}, "0OrF-ls7wmM": {"duration": 51, "path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-stain/", "keywords": "", "id": "0OrF-ls7wmM", "title": "Art Terms in Action: Stain", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0OrF-ls7wmM.mp4/0OrF-ls7wmM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0OrF-ls7wmM.mp4/0OrF-ls7wmM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0OrF-ls7wmM.m3u8/0OrF-ls7wmM.m3u8"}, "slug": "moma-art-term-stain", "video_id": "0OrF-ls7wmM", "youtube_id": "0OrF-ls7wmM", "readable_id": "moma-art-term-stain"}, "lhRfE13mM70": {"duration": 618, "path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/enolate-formation-from-ketones/", "keywords": "", "id": "lhRfE13mM70", "title": "Enolate formation from ketones", "description": "Forming enolates from ketones using LDA and sodium ethoxide", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lhRfE13mM70.mp4/lhRfE13mM70.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lhRfE13mM70.mp4/lhRfE13mM70.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lhRfE13mM70.m3u8/lhRfE13mM70.m3u8"}, "slug": "enolate-formation-from-ketones", "video_id": "lhRfE13mM70", "youtube_id": "lhRfE13mM70", "readable_id": "enolate-formation-from-ketones"}, "dijqYyFY1GM": {"duration": 408, "path": "khan/test-prep/mcat/biomolecules/dna/the-genetic-code/", "keywords": "", "id": "dijqYyFY1GM", "title": "The genetic code", "description": "How do nucleotides in RNA get translated into amino acids in a protein? The key is the genetic code, which shows the corresponding amino acid for each possible combination of three nucleotides (codon).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dijqYyFY1GM.mp4/dijqYyFY1GM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dijqYyFY1GM.mp4/dijqYyFY1GM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dijqYyFY1GM.m3u8/dijqYyFY1GM.m3u8"}, "slug": "the-genetic-code", "video_id": "dijqYyFY1GM", "youtube_id": "dijqYyFY1GM", "readable_id": "the-genetic-code"}, "prL5WuhGPLI": {"duration": 447, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/emphysema-diagnosis/", "keywords": "", "id": "prL5WuhGPLI", "title": "Emphysema diagnosis", "description": "How do we know a patient has emphysema? Learn how the lungs in chest x-rays look hyperinflated, how spirometry can reveal decreased lung function, and what all those blood tests mean.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/prL5WuhGPLI.mp4/prL5WuhGPLI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/prL5WuhGPLI.mp4/prL5WuhGPLI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/prL5WuhGPLI.m3u8/prL5WuhGPLI.m3u8"}, "slug": "emphysema-diagnosis", "video_id": "prL5WuhGPLI", "youtube_id": "prL5WuhGPLI", "readable_id": "emphysema-diagnosis"}, "iHXdzfF7UEs": {"duration": 638, "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/sample-variance/", "keywords": "sample variance, unbiased estimator, statistics", "id": "iHXdzfF7UEs", "title": "Sample variance", "description": "Thinking about how we can estimate the variance of a population by looking at the data in a sample.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iHXdzfF7UEs.mp4/iHXdzfF7UEs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iHXdzfF7UEs.mp4/iHXdzfF7UEs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iHXdzfF7UEs.m3u8/iHXdzfF7UEs.m3u8"}, "slug": "sample-variance", "video_id": "iHXdzfF7UEs", "youtube_id": "iHXdzfF7UEs", "readable_id": "sample-variance"}, "pdU1qTky64o": {"duration": 316, "path": "khan/test-prep/mcat/physical-processes/acceleration-mcat/airbus-a380-take-off-time-2/", "keywords": "", "id": "pdU1qTky64o", "title": "Airbus A380 take-off time", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pdU1qTky64o.mp4/pdU1qTky64o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pdU1qTky64o.mp4/pdU1qTky64o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pdU1qTky64o.m3u8/pdU1qTky64o.m3u8"}, "slug": "airbus-a380-take-off-time-2", "video_id": "pdU1qTky64o", "youtube_id": "pdU1qTky64o", "readable_id": "airbus-a380-take-off-time-2"}, "EFB9JrBW4ro": {"duration": 81, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-8-8/", "keywords": "", "id": "EFB9JrBW4ro", "title": "8 Mathematical expression from words", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EFB9JrBW4ro.mp4/EFB9JrBW4ro.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EFB9JrBW4ro.mp4/EFB9JrBW4ro.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EFB9JrBW4ro.m3u8/EFB9JrBW4ro.m3u8"}, "slug": "sat-2008-may-8-8", "video_id": "EFB9JrBW4ro", "youtube_id": "EFB9JrBW4ro", "readable_id": "sat-2008-may-8-8"}, "kfySynqWWos": {"duration": 149, "path": "khan/math/pre-algebra/rates-and-ratios/ratios_and_proportions/solving-ratio-problems-with-tables-exercise-2/", "keywords": "", "id": "kfySynqWWos", "title": "Solving ratio problems with tables example 2", "description": "Let's compare 2 tables of ratios and interpret them to solve the word problem. This is a fun!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kfySynqWWos.mp4/kfySynqWWos.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kfySynqWWos.mp4/kfySynqWWos.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kfySynqWWos.m3u8/kfySynqWWos.m3u8"}, "slug": "solving-ratio-problems-with-tables-exercise-2", "video_id": "kfySynqWWos", "youtube_id": "kfySynqWWos", "readable_id": "solving-ratio-problems-with-tables-exercise-2"}, "BsLnura5zwE": {"duration": 214, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/tchaikovsky-4th-analysis/pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-3/", "keywords": "", "id": "BsLnura5zwE", "title": "Pyotr Ilyich Tchaikovsky: Symphony No.4, analysis by Gerard Schwarz (part 3)", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BsLnura5zwE.mp4/BsLnura5zwE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BsLnura5zwE.mp4/BsLnura5zwE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BsLnura5zwE.m3u8/BsLnura5zwE.m3u8"}, "slug": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-3", "video_id": "BsLnura5zwE", "youtube_id": "BsLnura5zwE", "readable_id": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-3"}, "xRjfRVXXFxU": {"duration": 613, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/investment-vs-comsumption-2/", "keywords": "investment, consumption, speculation", "id": "xRjfRVXXFxU", "title": "Investment vs. consumption 2", "description": "More investment vs. consumption examples.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xRjfRVXXFxU.mp4/xRjfRVXXFxU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xRjfRVXXFxU.mp4/xRjfRVXXFxU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xRjfRVXXFxU.m3u8/xRjfRVXXFxU.m3u8"}, "slug": "investment-vs-comsumption-2", "video_id": "xRjfRVXXFxU", "youtube_id": "xRjfRVXXFxU", "readable_id": "investment-vs-comsumption-2"}, "6YY3OOPmUDA": {"duration": 727, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-1/", "keywords": "", "id": "6YY3OOPmUDA", "title": "Systolic murmurs, diastolic murmurs, and extra heart sounds - Part 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6YY3OOPmUDA.mp4/6YY3OOPmUDA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6YY3OOPmUDA.mp4/6YY3OOPmUDA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6YY3OOPmUDA.m3u8/6YY3OOPmUDA.m3u8"}, "slug": "systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-1", "video_id": "6YY3OOPmUDA", "youtube_id": "6YY3OOPmUDA", "readable_id": "systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-1"}, "k3qZCxL5TeE": {"duration": 138, "path": "khan/math/pre-algebra/order-of-operations/whole-number-representations-tut/largest-possible-number-from-4-digits-example/", "keywords": "", "id": "k3qZCxL5TeE", "title": "Creating the largest possible number", "description": "Taking numbers and moving them into different place values to create the highest (and lowest) numbers possible.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/k3qZCxL5TeE.mp4/k3qZCxL5TeE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/k3qZCxL5TeE.mp4/k3qZCxL5TeE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/k3qZCxL5TeE.m3u8/k3qZCxL5TeE.m3u8"}, "slug": "largest-possible-number-from-4-digits-example", "video_id": "k3qZCxL5TeE", "youtube_id": "k3qZCxL5TeE", "readable_id": "largest-possible-number-from-4-digits-example"}, "ZDbM6uugJkk": {"duration": 451, "path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/total-internal-reflection-edited/", "keywords": "", "id": "ZDbM6uugJkk", "title": "Total internal reflection", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZDbM6uugJkk.mp4/ZDbM6uugJkk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZDbM6uugJkk.mp4/ZDbM6uugJkk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZDbM6uugJkk.m3u8/ZDbM6uugJkk.m3u8"}, "slug": "total-internal-reflection-edited", "video_id": "ZDbM6uugJkk", "youtube_id": "ZDbM6uugJkk", "readable_id": "total-internal-reflection-edited"}, "abc1Y4X-id8": {"duration": 325, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/jos-mara-velasco-the-valley-of-mexico-from-the-santa-isabel-mountain-range-1875/", "keywords": "", "id": "abc1Y4X-id8", "title": "Velasco, The Valley of Mexico", "description": "Jos\u00e9 Mar\u00eda Velasco, The Valley of Mexico from the Santa Isabel Mountain Range (Valle de M\u00e9xico desde el cerro de Santa Isabel),1875, oil on canvas, 137.5 x 226 cm (Museo Nacional de Arte, INBA, Mexico City)\n\nSpeakers: Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/abc1Y4X-id8.mp4/abc1Y4X-id8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/abc1Y4X-id8.mp4/abc1Y4X-id8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/abc1Y4X-id8.m3u8/abc1Y4X-id8.m3u8"}, "slug": "jos-mara-velasco-the-valley-of-mexico-from-the-santa-isabel-mountain-range-1875", "video_id": "abc1Y4X-id8", "youtube_id": "abc1Y4X-id8", "readable_id": "jos-mara-velasco-the-valley-of-mexico-from-the-santa-isabel-mountain-range-1875"}, "4F6cFLnAAFc": {"duration": 451, "path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/fractional-exponent-expressions-2/", "keywords": "U07_L3_T4_we2, Fractional, Exponent, Expressions, CC_6_EE_2_c, CC_6_EE_3, CC_7_NS_2, CC_7_NS_2_a, CC_7_NS_2_c, CC_7_NS_3, CC_8_EE_1", "id": "4F6cFLnAAFc", "title": "How to simplify a variable expression with mixed exponential and radical terms (example)", "description": "Sal rewrites (r^(2/3)s^3)^2*\u221a(20r^4s^5), once as an exponential expression and once as a radical expression.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4F6cFLnAAFc.mp4/4F6cFLnAAFc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4F6cFLnAAFc.mp4/4F6cFLnAAFc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4F6cFLnAAFc.m3u8/4F6cFLnAAFc.m3u8"}, "slug": "fractional-exponent-expressions-2", "video_id": "4F6cFLnAAFc", "youtube_id": "4F6cFLnAAFc", "readable_id": "fractional-exponent-expressions-2"}, "3Lawz8TcPig": {"duration": 205, "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-spain/goya-saturn-devouring-one-of-his-sons/", "keywords": "art, art history, goya, prado, romanticism", "id": "3Lawz8TcPig", "title": "Goya, Saturn Devouring His Son", "description": "Francisco de Goya y Lucientes, Saturn Devouring One Of His Sons, 1821-1823, 143.5 x 81.4 cm (Prado, Madrid) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\n\u00a0\n\nOne of the\"Black Paintings\" that Goya painted on the walls of his house outside Madrid. This image was originally located on the lower floor of the house known as \"la Quinta del Sordo.\" Goya painted on the walls using several materials including oil paint. The \"Black Paintings\" had suffered significant damage and loss in their original location and when they were removed from the walls and transferred to canvas by Baron \u00c9mile d'Erlanger shortly after he aquired the house in 1873. Please note that Saturn is also known as Cronus or Kronus.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3Lawz8TcPig.mp4/3Lawz8TcPig.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3Lawz8TcPig.mp4/3Lawz8TcPig.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3Lawz8TcPig.m3u8/3Lawz8TcPig.m3u8"}, "slug": "goya-saturn-devouring-one-of-his-sons", "video_id": "3Lawz8TcPig", "youtube_id": "3Lawz8TcPig", "readable_id": "goya-saturn-devouring-one-of-his-sons"}, "ajeETSrukxY": {"duration": 36, "path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-palette-knife/", "keywords": "", "id": "ajeETSrukxY", "title": "Art Terms in Action: Palette Knife", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ajeETSrukxY.mp4/ajeETSrukxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ajeETSrukxY.mp4/ajeETSrukxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ajeETSrukxY.m3u8/ajeETSrukxY.m3u8"}, "slug": "moma-art-term-palette-knife", "video_id": "ajeETSrukxY", "youtube_id": "ajeETSrukxY", "readable_id": "moma-art-term-palette-knife"}, "omFelSZvaJc": {"duration": 476, "path": "khan/math/arithmetic/multiplication-division/partial_quotient_division/partial-quotient-method-of-division-2/", "keywords": "arithmetic", "id": "omFelSZvaJc", "title": "Partial quotient method of division 2", "description": "Another example of doing long division using the partial quotient method", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/omFelSZvaJc.mp4/omFelSZvaJc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/omFelSZvaJc.mp4/omFelSZvaJc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/omFelSZvaJc.m3u8/omFelSZvaJc.m3u8"}, "slug": "partial-quotient-method-of-division-2", "video_id": "omFelSZvaJc", "youtube_id": "omFelSZvaJc", "readable_id": "partial-quotient-method-of-division-2"}, "jhjoGx6eGXs": {"duration": 188, "path": "khan/test-prep/mcat/processing-the-environment/sound-audition/cochlear-implant/", "keywords": "", "id": "jhjoGx6eGXs", "title": "Cochlear implants", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jhjoGx6eGXs.mp4/jhjoGx6eGXs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jhjoGx6eGXs.mp4/jhjoGx6eGXs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jhjoGx6eGXs.m3u8/jhjoGx6eGXs.m3u8"}, "slug": "cochlear-implant", "video_id": "jhjoGx6eGXs", "youtube_id": "jhjoGx6eGXs", "readable_id": "cochlear-implant"}, "TuId1spuyoc": {"duration": 153, "path": "khan/math/pre-algebra/fractions-pre-alg/fractions-unlike-denom-pre-alg/adding-fractions-ex-1/", "keywords": "Adding, fractions, ex, 1", "id": "TuId1spuyoc", "title": "Example of adding fractions with unlike denominators", "description": "To add these fractions we need to find a common denominator. The answer can be expressed as a mixed number. Let's try together.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TuId1spuyoc.mp4/TuId1spuyoc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TuId1spuyoc.mp4/TuId1spuyoc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TuId1spuyoc.m3u8/TuId1spuyoc.m3u8"}, "slug": "adding-fractions-ex-1", "video_id": "TuId1spuyoc", "youtube_id": "TuId1spuyoc", "readable_id": "adding-fractions-ex-1"}, "Wiuat7KdMmA": {"duration": 519, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/henry-s-law/", "keywords": "", "id": "Wiuat7KdMmA", "title": "Henry's law", "description": "Explore the relationship between partial pressure of a gas and the concentration of the gas molecule within a liquid. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Wiuat7KdMmA.mp4/Wiuat7KdMmA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Wiuat7KdMmA.mp4/Wiuat7KdMmA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Wiuat7KdMmA.m3u8/Wiuat7KdMmA.m3u8"}, "slug": "henry-s-law", "video_id": "Wiuat7KdMmA", "youtube_id": "Wiuat7KdMmA", "readable_id": "henry-s-law"}, "IFKnq9QM6_A": {"duration": 789, "path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/elements-and-atoms/", "keywords": "chemistry, physics", "id": "IFKnq9QM6_A", "title": "Elements and atoms", "description": "How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IFKnq9QM6_A.mp4/IFKnq9QM6_A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IFKnq9QM6_A.mp4/IFKnq9QM6_A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IFKnq9QM6_A.m3u8/IFKnq9QM6_A.m3u8"}, "slug": "elements-and-atoms", "video_id": "IFKnq9QM6_A", "youtube_id": "IFKnq9QM6_A", "readable_id": "elements-and-atoms"}, "bFj3HpdC4Uk": {"duration": 822, "path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/ozonolysis-1/", "keywords": "", "id": "bFj3HpdC4Uk", "title": "Ozonolysis", "description": "Alkene cleavage using ozone", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bFj3HpdC4Uk.mp4/bFj3HpdC4Uk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bFj3HpdC4Uk.mp4/bFj3HpdC4Uk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bFj3HpdC4Uk.m3u8/bFj3HpdC4Uk.m3u8"}, "slug": "ozonolysis-1", "video_id": "bFj3HpdC4Uk", "youtube_id": "bFj3HpdC4Uk", "readable_id": "ozonolysis-1"}, "lXfzq27fGvU": {"duration": 195, "path": "khan/humanities/art-1010/pop/warhol-gold-marilyn-monroe-1962/", "keywords": "marilyn, marilyn monroe, smarthistory, art, art history, warhol, pop art", "id": "lXfzq27fGvU", "title": "Warhol, Gold Marilyn Monroe", "description": "Andy Warhol, Gold Marilyn Monroe, Silkscreen ink, Silkscreen ink on synthetic polymer paint on canvas, 71.25 x 57 in. (211.4 x 144.7 cm), 1962 (MoMA)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lXfzq27fGvU.mp4/lXfzq27fGvU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lXfzq27fGvU.mp4/lXfzq27fGvU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lXfzq27fGvU.m3u8/lXfzq27fGvU.m3u8"}, "slug": "warhol-gold-marilyn-monroe-1962", "video_id": "lXfzq27fGvU", "youtube_id": "lXfzq27fGvU", "readable_id": "warhol-gold-marilyn-monroe-1962"}, "fakiCFD41TI": {"duration": 184, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ta-mccann/kauffman-ta-mccann1/", "keywords": "", "id": "fakiCFD41TI", "title": "T.A. McCann - Founder and CEO of Gist", "description": "T.A. McCann, Founder and CEO of Gist, talks about his entrepreneurial journey, including how he joined the America\u2019s Cup sailing team. T.A. discusses how entrepreneurs need to show initiative and chart their own course, advising other founders to always ask questions and make progress.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fakiCFD41TI.mp4/fakiCFD41TI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fakiCFD41TI.mp4/fakiCFD41TI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fakiCFD41TI.m3u8/fakiCFD41TI.m3u8"}, "slug": "kauffman-ta-mccann1", "video_id": "fakiCFD41TI", "youtube_id": "fakiCFD41TI", "readable_id": "kauffman-ta-mccann1"}, "Z9IWg0pcpqo": {"duration": 532, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/functional-groups/more-functional-groups/", "keywords": "", "id": "Z9IWg0pcpqo", "title": "More functional groups", "description": "An overview of the carbonyl-containing functional groups", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z9IWg0pcpqo.mp4/Z9IWg0pcpqo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z9IWg0pcpqo.mp4/Z9IWg0pcpqo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z9IWg0pcpqo.m3u8/Z9IWg0pcpqo.m3u8"}, "slug": "more-functional-groups", "video_id": "Z9IWg0pcpqo", "youtube_id": "Z9IWg0pcpqo", "readable_id": "more-functional-groups"}, "71L7-dyQsoQ": {"duration": 404, "path": "khan/humanities/art-asia/southeast-asia/bali/balinese-dance/", "keywords": "", "id": "71L7-dyQsoQ", "title": "Balinese dance, costumes, music", "description": "This video features examples of different types of Balinese dance, costumes, and music.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/71L7-dyQsoQ.mp4/71L7-dyQsoQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/71L7-dyQsoQ.mp4/71L7-dyQsoQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/71L7-dyQsoQ.m3u8/71L7-dyQsoQ.m3u8"}, "slug": "balinese-dance", "video_id": "71L7-dyQsoQ", "youtube_id": "71L7-dyQsoQ", "readable_id": "balinese-dance"}, "KwYhMXjMlvc": {"duration": 197, "path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/virgin-from-ger-second-half-of-the-12th-century/", "keywords": "Virgin Mary, Art History, Smarthistory, Mary (mother Of Jesus), Romanesque, Catalan, Barcelona", "id": "KwYhMXjMlvc", "title": "Virgin from Ger", "description": "Virgin from Ger, second half of the 12th century, wood, tempera, and stucco,\n51.8 x 20.5 x 15.5 cm, From the parish church of Santa Coloma de Ger,\nBaixa Cerdanya (Museu Nacional d'Art de Cataunya Palau Nacional, Barcelona)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KwYhMXjMlvc.mp4/KwYhMXjMlvc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KwYhMXjMlvc.mp4/KwYhMXjMlvc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KwYhMXjMlvc.m3u8/KwYhMXjMlvc.m3u8"}, "slug": "virgin-from-ger-second-half-of-the-12th-century", "video_id": "KwYhMXjMlvc", "youtube_id": "KwYhMXjMlvc", "readable_id": "virgin-from-ger-second-half-of-the-12th-century"}, "r5l5Cwge7yk": {"duration": 237, "path": "khan/test-prep/ap-art-history/cultures-religions-ap-arthistory/modern-pilgrimage-stories/", "keywords": "British Museum", "id": "r5l5Cwge7yk", "title": "Stories of the modern pilgrimage", "description": "Every year, 25,000 British Muslims make the pilgrimage to Mecca. As part of the exhibition, Hajj: journey to the heart of Islam, the British Museum asked what this journey is like... \u00a9Trustees of the British Museum. More Hajj stories from the Asian Art Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/r5l5Cwge7yk.mp4/r5l5Cwge7yk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/r5l5Cwge7yk.mp4/r5l5Cwge7yk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/r5l5Cwge7yk.m3u8/r5l5Cwge7yk.m3u8"}, "slug": "modern-pilgrimage-stories", "video_id": "r5l5Cwge7yk", "youtube_id": "r5l5Cwge7yk", "readable_id": "modern-pilgrimage-stories"}, "Sbgha6LQLlY": {"duration": 58, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-21-air-pollutants/", "keywords": "", "id": "Sbgha6LQLlY", "title": "21 Air pollutants", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Sbgha6LQLlY.mp4/Sbgha6LQLlY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Sbgha6LQLlY.mp4/Sbgha6LQLlY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Sbgha6LQLlY.m3u8/Sbgha6LQLlY.m3u8"}, "slug": "sat-21-air-pollutants", "video_id": "Sbgha6LQLlY", "youtube_id": "Sbgha6LQLlY", "readable_id": "sat-21-air-pollutants"}, "Bq9cq9FZuNM": {"duration": 455, "path": "khan/math/algebra2/manipulating-functions/finding-inverse-functions/function-inverses-example-3/", "keywords": "Function, Inverses, Example, CC_39336_F-BF_4, CC_39336_F-BF_4_a, CC_39336_F-BF_4_d", "id": "Bq9cq9FZuNM", "title": "How to find the inverse of a quadratic function (example)", "description": "Sal finds the inverse of f(x)=(x-1)^2-2.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Bq9cq9FZuNM.mp4/Bq9cq9FZuNM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Bq9cq9FZuNM.mp4/Bq9cq9FZuNM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Bq9cq9FZuNM.m3u8/Bq9cq9FZuNM.m3u8"}, "slug": "function-inverses-example-3", "video_id": "Bq9cq9FZuNM", "youtube_id": "Bq9cq9FZuNM", "readable_id": "function-inverses-example-3"}, "RLyXTj2j_c4": {"duration": 108, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/using-reflection-tool/", "keywords": "", "id": "RLyXTj2j_c4", "title": "How to perform a reflection (example)", "description": "Sal shows how to perform a reflection on a quadrilateral using our interactive widget!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RLyXTj2j_c4.mp4/RLyXTj2j_c4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RLyXTj2j_c4.mp4/RLyXTj2j_c4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RLyXTj2j_c4.m3u8/RLyXTj2j_c4.m3u8"}, "slug": "using-reflection-tool", "video_id": "RLyXTj2j_c4", "youtube_id": "RLyXTj2j_c4", "readable_id": "using-reflection-tool"}, "gkyuLPzfDV0": {"duration": 738, "path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/rotation-in-r3-around-the-x-axis/", "keywords": "linear, algebra, rotation, r3, matrix, transformation", "id": "gkyuLPzfDV0", "title": "Rotation in R3 around the x-axis", "description": "Construction a rotation transformation in R3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gkyuLPzfDV0.mp4/gkyuLPzfDV0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gkyuLPzfDV0.mp4/gkyuLPzfDV0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gkyuLPzfDV0.m3u8/gkyuLPzfDV0.m3u8"}, "slug": "rotation-in-r3-around-the-x-axis", "video_id": "gkyuLPzfDV0", "youtube_id": "gkyuLPzfDV0", "readable_id": "rotation-in-r3-around-the-x-axis"}, "MIAmN5kgp3k": {"duration": 1091, "path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/image-of-a-subset-under-a-transformation/", "keywords": "image, transformation", "id": "MIAmN5kgp3k", "title": "Image of a subset under a transformation", "description": "Exploring what happens to a subset of the domain under a transformation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MIAmN5kgp3k.mp4/MIAmN5kgp3k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MIAmN5kgp3k.mp4/MIAmN5kgp3k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MIAmN5kgp3k.m3u8/MIAmN5kgp3k.m3u8"}, "slug": "image-of-a-subset-under-a-transformation", "video_id": "MIAmN5kgp3k", "youtube_id": "MIAmN5kgp3k", "readable_id": "image-of-a-subset-under-a-transformation"}, "IB3iJUuxt1c": {"duration": 459, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/what-is-leukemia/", "keywords": "", "id": "IB3iJUuxt1c", "title": "What is leukemia?", "description": "Leukemia is a collection of cancers which create a large amount of immature blood cells. These immature blood cells take up space in the bone marrow, preventing the bone marrow from making healthy blood cells such as platelets, red blood cells, and white blood cells. Learn about the symptoms of this disease which include prolonged bleeding, frequent infections, and bone pain.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IB3iJUuxt1c.mp4/IB3iJUuxt1c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IB3iJUuxt1c.mp4/IB3iJUuxt1c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IB3iJUuxt1c.m3u8/IB3iJUuxt1c.m3u8"}, "slug": "what-is-leukemia", "video_id": "IB3iJUuxt1c", "youtube_id": "IB3iJUuxt1c", "readable_id": "what-is-leukemia"}, "SQzjzStU1RQ": {"duration": 248, "path": "khan/math/algebra2/functions-and-graphs/undefined_indeterminate/why-dividing-by-zero-is-undefined/", "keywords": "zero, undefined", "id": "SQzjzStU1RQ", "title": "Why dividing by zero is undefined", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SQzjzStU1RQ.mp4/SQzjzStU1RQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SQzjzStU1RQ.mp4/SQzjzStU1RQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SQzjzStU1RQ.m3u8/SQzjzStU1RQ.m3u8"}, "slug": "why-dividing-by-zero-is-undefined", "video_id": "SQzjzStU1RQ", "youtube_id": "SQzjzStU1RQ", "readable_id": "why-dividing-by-zero-is-undefined"}, "FH1L5NnuDXM": {"duration": 443, "path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-of-a-universal-remote-control-1/", "keywords": "universal remote, epoxy potting, integrated circuit, copper traces, conductive contacts, ABS plastic, neoprene, inferred LED, pulse, buttons, conductive, code based universal remote, learning remote, light emitting diode, batteries, springs, contacts, prin", "id": "FH1L5NnuDXM", "title": "What is inside a universal remote control?", "description": "In this video we explore what is inside a universal remote control, how it is made, and how it works.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FH1L5NnuDXM.mp4/FH1L5NnuDXM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FH1L5NnuDXM.mp4/FH1L5NnuDXM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FH1L5NnuDXM.m3u8/FH1L5NnuDXM.m3u8"}, "slug": "what-is-inside-of-a-universal-remote-control-1", "video_id": "FH1L5NnuDXM", "youtube_id": "FH1L5NnuDXM", "readable_id": "what-is-inside-of-a-universal-remote-control-1"}, "Me_041nrRZk": {"duration": 301, "path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/evolution-natural-selection/", "keywords": "", "id": "Me_041nrRZk", "title": "Evolution and natural selection", "description": "Learn the fundamental principles about how natural selection can drive the process of evolution.\u00a0 By Ross Firestone.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Me_041nrRZk.mp4/Me_041nrRZk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Me_041nrRZk.mp4/Me_041nrRZk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Me_041nrRZk.m3u8/Me_041nrRZk.m3u8"}, "slug": "evolution-natural-selection", "video_id": "Me_041nrRZk", "youtube_id": "Me_041nrRZk", "readable_id": "evolution-natural-selection"}, "Efoeqb6tC88": {"duration": 371, "path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/complex-plane-distance-midpoint/", "keywords": "", "id": "Efoeqb6tC88", "title": "Midpoint and distance on complex plane", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Efoeqb6tC88.mp4/Efoeqb6tC88.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Efoeqb6tC88.mp4/Efoeqb6tC88.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Efoeqb6tC88.m3u8/Efoeqb6tC88.m3u8"}, "slug": "complex-plane-distance-midpoint", "video_id": "Efoeqb6tC88", "youtube_id": "Efoeqb6tC88", "readable_id": "complex-plane-distance-midpoint"}, "24WMbh1BBKc": {"duration": 476, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/slope/similar-triangles-to-prove-that-the-slope-is-constant-for-a-line/", "keywords": "", "id": "24WMbh1BBKc", "title": "Similar triangles to prove that the slope is constant for a line", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/24WMbh1BBKc.mp4/24WMbh1BBKc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/24WMbh1BBKc.mp4/24WMbh1BBKc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/24WMbh1BBKc.m3u8/24WMbh1BBKc.m3u8"}, "slug": "similar-triangles-to-prove-that-the-slope-is-constant-for-a-line", "video_id": "24WMbh1BBKc", "youtube_id": "24WMbh1BBKc", "readable_id": "similar-triangles-to-prove-that-the-slope-is-constant-for-a-line"}, "cN5jQ7sQMn0": {"duration": 461, "path": "khan/test-prep/mcat/cells/prokaryotes-bacteria/overview-of-archaea-protista-and-bacteria/", "keywords": "", "id": "cN5jQ7sQMn0", "title": "Overview of Archaea, Protista, and Bacteria", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cN5jQ7sQMn0.mp4/cN5jQ7sQMn0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cN5jQ7sQMn0.mp4/cN5jQ7sQMn0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cN5jQ7sQMn0.m3u8/cN5jQ7sQMn0.m3u8"}, "slug": "overview-of-archaea-protista-and-bacteria", "video_id": "cN5jQ7sQMn0", "youtube_id": "cN5jQ7sQMn0", "readable_id": "overview-of-archaea-protista-and-bacteria"}, "L67dlpMgDa4": {"duration": 564, "path": "khan/partner-content/wi-phi/value-theory-1/problem-of-evil-part-3/", "keywords": "", "id": "L67dlpMgDa4", "title": "Ethics: Problem of Evil, Part 3", "description": "Part 3 of a trilogy. Greg considers the evidential version of the Problem of Evil, and gives a response on behalf of someone who believes that God exists. This involves considering whether God might have a good reason to allow bad things to happen.\n\nSpeaker: Dr.\u00a0Greg Ganssle, Senior Fellow, Rivendell Institute, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L67dlpMgDa4.mp4/L67dlpMgDa4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L67dlpMgDa4.mp4/L67dlpMgDa4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L67dlpMgDa4.m3u8/L67dlpMgDa4.m3u8"}, "slug": "problem-of-evil-part-3", "video_id": "L67dlpMgDa4", "youtube_id": "L67dlpMgDa4", "readable_id": "problem-of-evil-part-3"}, "Fr_La6MrAfM": {"duration": 268, "path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/more-on-the-dot-structure-for-sulfur-dioxide/", "keywords": "", "id": "Fr_La6MrAfM", "title": "More on the dot structure for sulfur dioxide", "description": "How to analyze different ways to draw the dot structure for sulfur dioxide", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Fr_La6MrAfM.mp4/Fr_La6MrAfM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Fr_La6MrAfM.mp4/Fr_La6MrAfM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Fr_La6MrAfM.m3u8/Fr_La6MrAfM.m3u8"}, "slug": "more-on-the-dot-structure-for-sulfur-dioxide", "video_id": "Fr_La6MrAfM", "youtube_id": "Fr_La6MrAfM", "readable_id": "more-on-the-dot-structure-for-sulfur-dioxide"}, "GKohvH75Mqg": {"duration": 44, "path": "khan/science/discoveries-projects/discoveries/batteries/electrolyte-strong-acid-test/", "keywords": "strong acid", "id": "GKohvH75Mqg", "title": "Electrolyte (strong acid test)", "description": "Experimenting with a strong acid as electrolyte and observing the change in deflection compared to weak acid (vinegar)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GKohvH75Mqg.mp4/GKohvH75Mqg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GKohvH75Mqg.mp4/GKohvH75Mqg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GKohvH75Mqg.m3u8/GKohvH75Mqg.m3u8"}, "slug": "electrolyte-strong-acid-test", "video_id": "GKohvH75Mqg", "youtube_id": "GKohvH75Mqg", "readable_id": "electrolyte-strong-acid-test"}, "JVlfQEhzLMM": {"duration": 247, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/more-equation-practice/mixture-problems-3/", "keywords": "U06_L2_T2_we3, Mixture, problems, CC_7_RP_2, CC_7_RP_2_b, CC_7_RP_2_c, CC_7_RP_3, CC_39336_A-CED_2, CC_39336_A-REI_1", "id": "JVlfQEhzLMM", "title": "Mixture problems 3", "description": "Mixture problems 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JVlfQEhzLMM.mp4/JVlfQEhzLMM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JVlfQEhzLMM.mp4/JVlfQEhzLMM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JVlfQEhzLMM.m3u8/JVlfQEhzLMM.m3u8"}, "slug": "mixture-problems-3", "video_id": "JVlfQEhzLMM", "youtube_id": "JVlfQEhzLMM", "readable_id": "mixture-problems-3"}, "9wguQaBYKec": {"duration": 514, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/colosseum-amphitheatrum-flavium-c-70-80-c-e-rome/", "keywords": "colosseum, new", "id": "9wguQaBYKec", "title": "Colosseum (Flavian Amphitheater)", "description": "Colosseum (Amphitheatrum Flavium), c. 70-80 C.E., Rome Speakers: Valentina Follo (courtesy of Context Travel), Dr. Beth Harris, Dr. Steven Zucker Cover photo by Julia Avra Ugoretz Views of the Colosseum were taken from the Rome Reborn model of ancient Rome with the permission of The Rome Reborn Project (www.romereborn.virginia.edu). The model is copyright 2004 by The Regents of the University of California. All rights reserved. Speakers: Valentina Follo (courtesy of Context Travel), Dr. Beth Harris, Dr. Steven Zucker Cover photo by Julia Avra Ugoretz. Views of the Colosseum were taken from the Rome Reborn model of ancient Rome with the permission of The Rome Reborn Project (www.romereborn.virginia.edu). The model is copyright 2004 by The Regents of the University of California. All rights reserved. This video illustrates the latest version of the model (2.1), which was created from January to May, 2010.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9wguQaBYKec.mp4/9wguQaBYKec.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9wguQaBYKec.mp4/9wguQaBYKec.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9wguQaBYKec.m3u8/9wguQaBYKec.m3u8"}, "slug": "colosseum-amphitheatrum-flavium-c-70-80-c-e-rome", "video_id": "9wguQaBYKec", "youtube_id": "9wguQaBYKec", "readable_id": "colosseum-amphitheatrum-flavium-c-70-80-c-e-rome"}, "KT32CsdEZEY": {"duration": 195, "path": "khan/math/algebra/rational-and-irrational-numbers/rational-and-irrational-expressions/proof-that-rational-times-irrational-is-irrational/", "keywords": "", "id": "KT32CsdEZEY", "title": "Proof that rational times irrational is irrational", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KT32CsdEZEY.mp4/KT32CsdEZEY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KT32CsdEZEY.mp4/KT32CsdEZEY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KT32CsdEZEY.m3u8/KT32CsdEZEY.m3u8"}, "slug": "proof-that-rational-times-irrational-is-irrational", "video_id": "KT32CsdEZEY", "youtube_id": "KT32CsdEZEY", "readable_id": "proof-that-rational-times-irrational-is-irrational"}, "MTzTqvzWzm8": {"duration": 1022, "path": "khan/math/arithmetic/multiplication-division/delightful_division/division-1/", "keywords": "division, arithmetic, CC_3_OA_2, CC_3_OA_7, CC_4_NBT_6", "id": "MTzTqvzWzm8", "title": "Division 1", "description": "Introduction to division", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MTzTqvzWzm8.mp4/MTzTqvzWzm8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MTzTqvzWzm8.mp4/MTzTqvzWzm8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MTzTqvzWzm8.m3u8/MTzTqvzWzm8.m3u8"}, "slug": "division-1", "video_id": "MTzTqvzWzm8", "youtube_id": "MTzTqvzWzm8", "readable_id": "division-1"}, "tYmMEqro8D4": {"duration": 434, "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/current-capital-account/why-current-and-capital-accounts-net-out/", "keywords": "macroeconomics, balance, of, trade", "id": "tYmMEqro8D4", "title": "Why current and capital accounts net out", "description": "Intuition behind why the current account and capital account should balance", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tYmMEqro8D4.mp4/tYmMEqro8D4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tYmMEqro8D4.mp4/tYmMEqro8D4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tYmMEqro8D4.m3u8/tYmMEqro8D4.m3u8"}, "slug": "why-current-and-capital-accounts-net-out", "video_id": "tYmMEqro8D4", "youtube_id": "tYmMEqro8D4", "readable_id": "why-current-and-capital-accounts-net-out"}, "1K5uvvz9c3M": {"duration": 122, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-28-tall-structures/", "keywords": "", "id": "1K5uvvz9c3M", "title": "28 Tall structures", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1K5uvvz9c3M.mp4/1K5uvvz9c3M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1K5uvvz9c3M.mp4/1K5uvvz9c3M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1K5uvvz9c3M.m3u8/1K5uvvz9c3M.m3u8"}, "slug": "sat-28-tall-structures", "video_id": "1K5uvvz9c3M", "youtube_id": "1K5uvvz9c3M", "readable_id": "sat-28-tall-structures"}, "pmQuNRHJMw4": {"duration": 431, "path": "khan/test-prep/mcat/chemical-processes/proteins/peptide-bond-formation-and-cleavage/", "keywords": "", "id": "pmQuNRHJMw4", "title": "Peptide bonds: Formation and cleavage", "description": "Peptide bonds are formed when the amine group of one amino acid binds with the carbonyl carbon of another amino acid. We will learn more about peptide bonds and how the cleaving process occurs. \u00a0By Tracy Kovach.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pmQuNRHJMw4.mp4/pmQuNRHJMw4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pmQuNRHJMw4.mp4/pmQuNRHJMw4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pmQuNRHJMw4.m3u8/pmQuNRHJMw4.m3u8"}, "slug": "peptide-bond-formation-and-cleavage", "video_id": "pmQuNRHJMw4", "youtube_id": "pmQuNRHJMw4", "readable_id": "peptide-bond-formation-and-cleavage"}, "gIQgnSfUB6E": {"duration": 429, "path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/estimates-of-area/", "keywords": "", "id": "gIQgnSfUB6E", "title": "Ranking area estimates", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gIQgnSfUB6E.mp4/gIQgnSfUB6E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gIQgnSfUB6E.mp4/gIQgnSfUB6E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gIQgnSfUB6E.m3u8/gIQgnSfUB6E.m3u8"}, "slug": "estimates-of-area", "video_id": "gIQgnSfUB6E", "youtube_id": "gIQgnSfUB6E", "readable_id": "estimates-of-area"}, "RcPI6Mb9J6k": {"duration": 179, "path": "khan/humanities/art-1010/art-between-wars/surrealism1/magritte-the-portrait/", "keywords": "", "id": "RcPI6Mb9J6k", "title": "Conservation | Ren\u00e9 Magritte, \"The Portrait,\" 1935", "description": "For more information please visit http://www.moma.org/magritte", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RcPI6Mb9J6k.mp4/RcPI6Mb9J6k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RcPI6Mb9J6k.mp4/RcPI6Mb9J6k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RcPI6Mb9J6k.m3u8/RcPI6Mb9J6k.m3u8"}, "slug": "magritte-the-portrait", "video_id": "RcPI6Mb9J6k", "youtube_id": "RcPI6Mb9J6k", "readable_id": "magritte-the-portrait"}, "_eBq2hRETmA": {"duration": 679, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/shock-diagnosis-and-treatment/", "keywords": "", "id": "_eBq2hRETmA", "title": "Shock - diagnosis and treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_eBq2hRETmA.mp4/_eBq2hRETmA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_eBq2hRETmA.mp4/_eBq2hRETmA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_eBq2hRETmA.m3u8/_eBq2hRETmA.m3u8"}, "slug": "shock-diagnosis-and-treatment", "video_id": "_eBq2hRETmA", "youtube_id": "_eBq2hRETmA", "readable_id": "shock-diagnosis-and-treatment"}, "CLneY6SoPi0": {"duration": 445, "path": "khan/test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system/lymphatic-vessels-move-fluid/", "keywords": "lymphatic vessel", "id": "CLneY6SoPi0", "title": "How lymphatic vessels move fluid", "description": "Find out how the body's mysterious second circulatory system works. Learn how it can move fluid even when it has no heart of its own. By Patrick van Nieuwenhuizen.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CLneY6SoPi0.mp4/CLneY6SoPi0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CLneY6SoPi0.mp4/CLneY6SoPi0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CLneY6SoPi0.m3u8/CLneY6SoPi0.m3u8"}, "slug": "lymphatic-vessels-move-fluid", "video_id": "CLneY6SoPi0", "youtube_id": "CLneY6SoPi0", "readable_id": "lymphatic-vessels-move-fluid"}, "-nufZ41Kg5c": {"duration": 187, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/constructing-quad-based-on-symmetry/", "keywords": "", "id": "-nufZ41Kg5c", "title": "How to construct a quadrilateral based on its line of symmetry (example)", "description": "Sal solves the following problem:\n\nTwo of the points that define a certain quadrilateral are (0,9) and (3,4). The quadrilateral has reflective symmetry over the line y=3-x. Draw and classify the quadrilateral.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-nufZ41Kg5c.mp4/-nufZ41Kg5c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-nufZ41Kg5c.mp4/-nufZ41Kg5c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-nufZ41Kg5c.m3u8/-nufZ41Kg5c.m3u8"}, "slug": "constructing-quad-based-on-symmetry", "video_id": "-nufZ41Kg5c", "youtube_id": "-nufZ41Kg5c", "readable_id": "constructing-quad-based-on-symmetry"}, "ATuMxyoVh_8": {"duration": 707, "path": "khan/humanities/history/euro-hist/world-war-i-fighting/world-war-i-eastern-front/", "keywords": "", "id": "ATuMxyoVh_8", "title": "World War I Eastern front", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ATuMxyoVh_8.mp4/ATuMxyoVh_8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ATuMxyoVh_8.mp4/ATuMxyoVh_8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ATuMxyoVh_8.m3u8/ATuMxyoVh_8.m3u8"}, "slug": "world-war-i-eastern-front", "video_id": "ATuMxyoVh_8", "youtube_id": "ATuMxyoVh_8", "readable_id": "world-war-i-eastern-front"}, "XHd7Ng45Vxk": {"duration": 174, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-13/", "keywords": "", "id": "XHd7Ng45Vxk", "title": "13 Exponent properties to simplify expression", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XHd7Ng45Vxk.mp4/XHd7Ng45Vxk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XHd7Ng45Vxk.mp4/XHd7Ng45Vxk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XHd7Ng45Vxk.m3u8/XHd7Ng45Vxk.m3u8"}, "slug": "sat-2010-may-9-13", "video_id": "XHd7Ng45Vxk", "youtube_id": "XHd7Ng45Vxk", "readable_id": "sat-2010-may-9-13"}, "jrGpD13LLf8": {"duration": 449, "path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/genetic-recombination-2/", "keywords": "", "id": "jrGpD13LLf8", "title": "Genetic recombination 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jrGpD13LLf8.mp4/jrGpD13LLf8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jrGpD13LLf8.mp4/jrGpD13LLf8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jrGpD13LLf8.m3u8/jrGpD13LLf8.m3u8"}, "slug": "genetic-recombination-2", "video_id": "jrGpD13LLf8", "youtube_id": "jrGpD13LLf8", "readable_id": "genetic-recombination-2"}, "obeGVTOZyfE": {"duration": 763, "path": "khan/science/chemistry/thermodynamics-chemistry/internal-energy-sal/work-from-expansion/", "keywords": "thermodynamics, heat, work, internal, energy", "id": "obeGVTOZyfE", "title": "Work from expansion", "description": "How a system can do work by expanding", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/obeGVTOZyfE.mp4/obeGVTOZyfE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/obeGVTOZyfE.mp4/obeGVTOZyfE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/obeGVTOZyfE.m3u8/obeGVTOZyfE.m3u8"}, "slug": "work-from-expansion", "video_id": "obeGVTOZyfE", "youtube_id": "obeGVTOZyfE", "readable_id": "work-from-expansion"}, "FEAXI5XeJ4M": {"duration": 603, "path": "khan/science/biology/macromolecules/carbohydrates-and-sugars/dehydration-synthesis-or-a-condensation-reaction/", "keywords": "education,online learning,learning,lessons,dehydration synthesis,condensation reaction,glucose", "id": "FEAXI5XeJ4M", "title": "Dehydration synthesis or a condensation reaction", "description": "Dehydration synthesis (condensation reaction) between sugar molecules. Monosaccharides, disaccharides, and polysaccharides. Formation of maltose from glucose monomers.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FEAXI5XeJ4M.mp4/FEAXI5XeJ4M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FEAXI5XeJ4M.mp4/FEAXI5XeJ4M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FEAXI5XeJ4M.m3u8/FEAXI5XeJ4M.m3u8"}, "slug": "dehydration-synthesis-or-a-condensation-reaction", "video_id": "FEAXI5XeJ4M", "youtube_id": "FEAXI5XeJ4M", "readable_id": "dehydration-synthesis-or-a-condensation-reaction"}, "AtK0QQYHKCk": {"duration": 687, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/drawing-chair-conformations/", "keywords": "", "id": "AtK0QQYHKCk", "title": "Drawing chair conformations", "description": "How to draw both chair conformations of cyclohexane", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AtK0QQYHKCk.mp4/AtK0QQYHKCk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AtK0QQYHKCk.mp4/AtK0QQYHKCk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AtK0QQYHKCk.m3u8/AtK0QQYHKCk.m3u8"}, "slug": "drawing-chair-conformations", "video_id": "AtK0QQYHKCk", "youtube_id": "AtK0QQYHKCk", "readable_id": "drawing-chair-conformations"}, "z1hz8-Kri1E": {"duration": 351, "path": "khan/math/algebra/systems-of-linear-equations/systems-of-linear-equations-word-problems/solving-systems-by-elimination/", "keywords": "U06_L1_T3_we1, Solving, systems, by, elimination, CC_8_EE_8_b, CC_8_EE_8_c, CC_39336_A-REI_6", "id": "z1hz8-Kri1E", "title": "Systems of equations word problems example: Weight of TV and DVD", "description": "Sal solves a word problem about the weights of TVs and DVDs by creating a system of equations and solving it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z1hz8-Kri1E.mp4/z1hz8-Kri1E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z1hz8-Kri1E.mp4/z1hz8-Kri1E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z1hz8-Kri1E.m3u8/z1hz8-Kri1E.m3u8"}, "slug": "solving-systems-by-elimination", "video_id": "z1hz8-Kri1E", "youtube_id": "z1hz8-Kri1E", "readable_id": "solving-systems-by-elimination"}, "bQ-KR3clFgs": {"duration": 292, "path": "khan/math/algebra-basics/core-algebra-foundations/core-algebra-foundations-negative-numbers/dividing-positive-and-negative-numbers/", "keywords": "dividing, negative, numbers", "id": "bQ-KR3clFgs", "title": "Dividing positive and negative numbers", "description": "Discover the basics of dividing with negative numbers.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bQ-KR3clFgs.mp4/bQ-KR3clFgs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bQ-KR3clFgs.mp4/bQ-KR3clFgs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bQ-KR3clFgs.m3u8/bQ-KR3clFgs.m3u8"}, "slug": "dividing-positive-and-negative-numbers", "video_id": "bQ-KR3clFgs", "youtube_id": "bQ-KR3clFgs", "readable_id": "dividing-positive-and-negative-numbers"}, "Hz0neklvbX8": {"duration": 603, "path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/crash-course-world-history-16/", "keywords": "crash course", "id": "Hz0neklvbX8", "title": "Mansa Musa and Islam in Africa", "description": "In which John Green teaches you about Sub-Saharan Africa! So, what exactly was going on there? It turns out, it was a lot of trade, converting to Islam, visits from Ibn Battuta, trade, beautiful women, trade, some impressive architecture, and several empires. John not only covers the West African Malian Empire, which is the one Mansa Musa ruled, but he discusses the Ghana Empire, and even gets over to East Africa as well to discuss the trade-based city-states of Mogadishu, Mombasa, and Zanzibar. In addition to all this, John considers emigrating to Canada.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hz0neklvbX8.mp4/Hz0neklvbX8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hz0neklvbX8.mp4/Hz0neklvbX8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hz0neklvbX8.m3u8/Hz0neklvbX8.m3u8"}, "slug": "crash-course-world-history-16", "video_id": "Hz0neklvbX8", "youtube_id": "Hz0neklvbX8", "readable_id": "crash-course-world-history-16"}, "SgKCGwSdCMo": {"duration": 386, "path": "khan/humanities/art-history-basics/art-1010/contemporary-art-intro/", "keywords": "", "id": "SgKCGwSdCMo", "title": "Introduction to Contemporary Art", "description": "A video from the Utah System of Higher Education (with special thanks to Dr. Nancy Ross)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SgKCGwSdCMo.mp4/SgKCGwSdCMo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SgKCGwSdCMo.mp4/SgKCGwSdCMo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SgKCGwSdCMo.m3u8/SgKCGwSdCMo.m3u8"}, "slug": "contemporary-art-intro", "video_id": "SgKCGwSdCMo", "youtube_id": "SgKCGwSdCMo", "readable_id": "contemporary-art-intro"}, "oosYQHq2hwE": {"duration": 476, "path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/mortgage-backed-securities-i/", "keywords": "finance, mortgage-backed, security, MBS", "id": "oosYQHq2hwE", "title": "Mortgage-backed securities I", "description": "Part I of the introduction to mortgage-backed securities", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oosYQHq2hwE.mp4/oosYQHq2hwE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oosYQHq2hwE.mp4/oosYQHq2hwE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oosYQHq2hwE.m3u8/oosYQHq2hwE.m3u8"}, "slug": "mortgage-backed-securities-i", "video_id": "oosYQHq2hwE", "youtube_id": "oosYQHq2hwE", "readable_id": "mortgage-backed-securities-i"}, "u_WqMXmCi7c": {"duration": 300, "path": "khan/test-prep/mcat/biomolecules/dna-technology/gel-electrophoresis-2/", "keywords": "", "id": "u_WqMXmCi7c", "title": "Gel electrophoresis", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u_WqMXmCi7c.mp4/u_WqMXmCi7c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u_WqMXmCi7c.mp4/u_WqMXmCi7c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u_WqMXmCi7c.m3u8/u_WqMXmCi7c.m3u8"}, "slug": "gel-electrophoresis-2", "video_id": "u_WqMXmCi7c", "youtube_id": "u_WqMXmCi7c", "readable_id": "gel-electrophoresis-2"}, "sy9GogcnnwY": {"duration": 704, "path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/regulation-of-krebs-tca-cycle/", "keywords": "", "id": "sy9GogcnnwY", "title": "Regulation of Krebs-TCA cycle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sy9GogcnnwY.mp4/sy9GogcnnwY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sy9GogcnnwY.mp4/sy9GogcnnwY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sy9GogcnnwY.m3u8/sy9GogcnnwY.m3u8"}, "slug": "regulation-of-krebs-tca-cycle", "video_id": "sy9GogcnnwY", "youtube_id": "sy9GogcnnwY", "readable_id": "regulation-of-krebs-tca-cycle"}, "mbb3msmX2xs": {"duration": 208, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-1-common-factors/factoring-linear-binomials/", "keywords": "", "id": "mbb3msmX2xs", "title": "How to factor a linear binomial by taking out a common factor (example)", "description": "Sal shows how to factor the expression 4x+18 into the expression 2(2x+9).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mbb3msmX2xs.mp4/mbb3msmX2xs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mbb3msmX2xs.mp4/mbb3msmX2xs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mbb3msmX2xs.m3u8/mbb3msmX2xs.m3u8"}, "slug": "factoring-linear-binomials", "video_id": "mbb3msmX2xs", "youtube_id": "mbb3msmX2xs", "readable_id": "factoring-linear-binomials"}, "hWhs2cIj7Cw": {"duration": 1486, "path": "khan/math/linear-algebra/vectors_and_spaces/vectors/linear-algebra-parametric-representations-of-lines/", "keywords": "Linear, Algebra, Vectors", "id": "hWhs2cIj7Cw", "title": "Parametric representations of lines", "description": "Parametric Representations of Lines in R2 and R3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hWhs2cIj7Cw.mp4/hWhs2cIj7Cw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hWhs2cIj7Cw.mp4/hWhs2cIj7Cw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hWhs2cIj7Cw.m3u8/hWhs2cIj7Cw.m3u8"}, "slug": "linear-algebra-parametric-representations-of-lines", "video_id": "hWhs2cIj7Cw", "youtube_id": "hWhs2cIj7Cw", "readable_id": "linear-algebra-parametric-representations-of-lines"}, "qGiPZf7njqY": {"duration": 576, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/meet-the-lungs/", "keywords": "", "id": "qGiPZf7njqY", "title": "Meet the lungs", "description": "Every time you take a breath, oxygen makes it way into your lungs. Follow along on that journey! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qGiPZf7njqY.mp4/qGiPZf7njqY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qGiPZf7njqY.mp4/qGiPZf7njqY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qGiPZf7njqY.m3u8/qGiPZf7njqY.m3u8"}, "slug": "meet-the-lungs", "video_id": "qGiPZf7njqY", "youtube_id": "qGiPZf7njqY", "readable_id": "meet-the-lungs"}, "TxwE4_dXo8s": {"duration": 688, "path": "khan/science/physics/electricity-magnetism/electric-field/proof-advanced-field-from-infinite-plate-part-2/", "keywords": "uniform, constant, electric, field, plate, charged", "id": "TxwE4_dXo8s", "title": "Proof (advanced): Field from infinite plate (part 2)", "description": "We see that the infinite, uniformly charged plate generates a constant electric field (independent of the height above the plate)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TxwE4_dXo8s.mp4/TxwE4_dXo8s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TxwE4_dXo8s.mp4/TxwE4_dXo8s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TxwE4_dXo8s.m3u8/TxwE4_dXo8s.m3u8"}, "slug": "proof-advanced-field-from-infinite-plate-part-2", "video_id": "TxwE4_dXo8s", "youtube_id": "TxwE4_dXo8s", "readable_id": "proof-advanced-field-from-infinite-plate-part-2"}, "ZtI94pI4Uzc": {"duration": 358, "path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/implicit-derivative-of-e-xy-2-x-y/", "keywords": "", "id": "ZtI94pI4Uzc", "title": "Implicit derivative of e^(xy^2) = x - y", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZtI94pI4Uzc.mp4/ZtI94pI4Uzc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZtI94pI4Uzc.mp4/ZtI94pI4Uzc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZtI94pI4Uzc.m3u8/ZtI94pI4Uzc.m3u8"}, "slug": "implicit-derivative-of-e-xy-2-x-y", "video_id": "ZtI94pI4Uzc", "youtube_id": "ZtI94pI4Uzc", "readable_id": "implicit-derivative-of-e-xy-2-x-y"}, "wE7_9Xce6LM": {"duration": 297, "path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/medea-sarcophagus-140-150-c-e/", "keywords": "Medea, Sarcophagus, GAP, Art History, Euripides, Jason, Khan Academy, smarthistory, Google Art Project, OER, painting", "id": "wE7_9Xce6LM", "title": "Empire: Medea Sarcophagus", "description": "Medea Sarcophagus, 140 - 150 C.E., marble, 65 x 227 cm (Altes Museum, Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wE7_9Xce6LM.mp4/wE7_9Xce6LM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wE7_9Xce6LM.mp4/wE7_9Xce6LM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wE7_9Xce6LM.m3u8/wE7_9Xce6LM.m3u8"}, "slug": "medea-sarcophagus-140-150-c-e", "video_id": "wE7_9Xce6LM", "youtube_id": "wE7_9Xce6LM", "readable_id": "medea-sarcophagus-140-150-c-e"}, "g1ZZIee9zk0": {"duration": 639, "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes-jay/alkene-nomenclature/", "keywords": "", "id": "g1ZZIee9zk0", "title": "Alkene nomenclature", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g1ZZIee9zk0.mp4/g1ZZIee9zk0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g1ZZIee9zk0.mp4/g1ZZIee9zk0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g1ZZIee9zk0.m3u8/g1ZZIee9zk0.m3u8"}, "slug": "alkene-nomenclature", "video_id": "g1ZZIee9zk0", "youtube_id": "g1ZZIee9zk0", "readable_id": "alkene-nomenclature"}, "IJySBMtFlnQ": {"duration": 334, "path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law-of-sines-example/", "keywords": "", "id": "IJySBMtFlnQ", "title": "Law of sines for missing angle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IJySBMtFlnQ.mp4/IJySBMtFlnQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IJySBMtFlnQ.mp4/IJySBMtFlnQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IJySBMtFlnQ.m3u8/IJySBMtFlnQ.m3u8"}, "slug": "law-of-sines-example", "video_id": "IJySBMtFlnQ", "youtube_id": "IJySBMtFlnQ", "readable_id": "law-of-sines-example"}, "NFmDz1dQyPU": {"duration": 223, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/decimal-to-hexadecimal/", "keywords": "", "id": "NFmDz1dQyPU", "title": "Converting from decimal to hexadecimal representation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NFmDz1dQyPU.mp4/NFmDz1dQyPU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NFmDz1dQyPU.mp4/NFmDz1dQyPU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NFmDz1dQyPU.m3u8/NFmDz1dQyPU.m3u8"}, "slug": "decimal-to-hexadecimal", "video_id": "NFmDz1dQyPU", "youtube_id": "NFmDz1dQyPU", "readable_id": "decimal-to-hexadecimal"}, "Pk6s2OlKzKQ": {"duration": 573, "path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/youngs-double-split-part-1/", "keywords": "", "id": "Pk6s2OlKzKQ", "title": "Young's Double slit part 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Pk6s2OlKzKQ.mp4/Pk6s2OlKzKQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Pk6s2OlKzKQ.mp4/Pk6s2OlKzKQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Pk6s2OlKzKQ.m3u8/Pk6s2OlKzKQ.m3u8"}, "slug": "youngs-double-split-part-1", "video_id": "Pk6s2OlKzKQ", "youtube_id": "Pk6s2OlKzKQ", "readable_id": "youngs-double-split-part-1"}, "kqU_ymV581c": {"duration": 541, "path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/the-angle-game/", "keywords": "geometry, math, angles, complementary, supplementary, parallel, opposite, CC_7_G_5, CC_8_G_5", "id": "kqU_ymV581c", "title": "The angle game", "description": "Using what we know to solve for angles in the Angle Game.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kqU_ymV581c.mp4/kqU_ymV581c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kqU_ymV581c.mp4/kqU_ymV581c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kqU_ymV581c.m3u8/kqU_ymV581c.m3u8"}, "slug": "the-angle-game", "video_id": "kqU_ymV581c", "youtube_id": "kqU_ymV581c", "readable_id": "the-angle-game"}, "SIoKwUcmivk": {"duration": 883, "path": "khan/test-prep/mcat/individuals-and-society/self-identity/eriksons-psychosocial-development/", "keywords": "", "id": "SIoKwUcmivk", "title": "Erikson's psychosocial development", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SIoKwUcmivk.mp4/SIoKwUcmivk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SIoKwUcmivk.mp4/SIoKwUcmivk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SIoKwUcmivk.m3u8/SIoKwUcmivk.m3u8"}, "slug": "eriksons-psychosocial-development", "video_id": "SIoKwUcmivk", "youtube_id": "SIoKwUcmivk", "readable_id": "eriksons-psychosocial-development"}, "NIazpCER9oM": {"duration": 342, "path": "khan/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem/polynomial-remainder-theorem-proof/", "keywords": "", "id": "NIazpCER9oM", "title": "Proof of the Polynomial Remainder Theorem", "description": "The PRT (Polynomial Remainder Theorem) may seem crazy to prove, but Sal shows how you can do it in less than six minutes!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NIazpCER9oM.mp4/NIazpCER9oM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NIazpCER9oM.mp4/NIazpCER9oM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NIazpCER9oM.m3u8/NIazpCER9oM.m3u8"}, "slug": "polynomial-remainder-theorem-proof", "video_id": "NIazpCER9oM", "youtube_id": "NIazpCER9oM", "readable_id": "polynomial-remainder-theorem-proof"}, "PwDnpb_ZJvc": {"duration": 255, "path": "khan/math/algebra-basics/core-algebra-foundations/world-of-exponents-college-readiness/powers-of-zero/", "keywords": "", "id": "PwDnpb_ZJvc", "title": "Powers of zero", "description": "Any non-zero number to the zero power equals one. Zero to any positive exponent equals zero. So, what happens when you have zero to the zero power?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PwDnpb_ZJvc.mp4/PwDnpb_ZJvc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PwDnpb_ZJvc.mp4/PwDnpb_ZJvc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PwDnpb_ZJvc.m3u8/PwDnpb_ZJvc.m3u8"}, "slug": "powers-of-zero", "video_id": "PwDnpb_ZJvc", "youtube_id": "PwDnpb_ZJvc", "readable_id": "powers-of-zero"}, "10dTx1Zy_4w": {"duration": 369, "path": "khan/math/early-math/cc-early-math-geometry-topic/cc-early-math-properties-shapes/recognizing-shapes/", "keywords": "", "id": "10dTx1Zy_4w", "title": "Recognizing shapes", "description": "Learn how to identify circles, triangles, squares, rectangles, rhombuses, and trapezoids.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/10dTx1Zy_4w.mp4/10dTx1Zy_4w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/10dTx1Zy_4w.mp4/10dTx1Zy_4w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/10dTx1Zy_4w.m3u8/10dTx1Zy_4w.m3u8"}, "slug": "recognizing-shapes", "video_id": "10dTx1Zy_4w", "youtube_id": "10dTx1Zy_4w", "readable_id": "recognizing-shapes"}, "7BgiKyvviyU": {"duration": 552, "path": "khan/science/organic-chemistry/organic-structures/formal-charge-resonance/resonance-intro-jay/", "keywords": "", "id": "7BgiKyvviyU", "title": "Resonance structures", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7BgiKyvviyU.mp4/7BgiKyvviyU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7BgiKyvviyU.mp4/7BgiKyvviyU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7BgiKyvviyU.m3u8/7BgiKyvviyU.m3u8"}, "slug": "resonance-intro-jay", "video_id": "7BgiKyvviyU", "youtube_id": "7BgiKyvviyU", "readable_id": "resonance-intro-jay"}, "koL4adsku1g": {"duration": 68, "path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-enamel/", "keywords": "", "id": "koL4adsku1g", "title": "Art Terms in Action: Enamel", "description": "Learn the properties of enamel paint and why artists use it. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/koL4adsku1g.mp4/koL4adsku1g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/koL4adsku1g.mp4/koL4adsku1g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/koL4adsku1g.m3u8/koL4adsku1g.m3u8"}, "slug": "moma-art-term-enamel", "video_id": "koL4adsku1g", "youtube_id": "koL4adsku1g", "readable_id": "moma-art-term-enamel"}, "v5YT8GlSxoU": {"duration": 339, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/real-nominal-gdp-tutorial/example-calculating-real-gdp-with-a-deflator/", "keywords": "macroeconomics", "id": "v5YT8GlSxoU", "title": "Example calculating real GDP with a deflator", "description": "Simple example of calculating Real GDP from Nominal GDP", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v5YT8GlSxoU.mp4/v5YT8GlSxoU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v5YT8GlSxoU.mp4/v5YT8GlSxoU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v5YT8GlSxoU.m3u8/v5YT8GlSxoU.m3u8"}, "slug": "example-calculating-real-gdp-with-a-deflator", "video_id": "v5YT8GlSxoU", "youtube_id": "v5YT8GlSxoU", "readable_id": "example-calculating-real-gdp-with-a-deflator"}, "_XdW_IVIOQ4": {"duration": 37, "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-teacher-experience/sscc-blended-teacherintro/", "keywords": "", "id": "_XdW_IVIOQ4", "title": "Teacher role: intro and big ideas", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_XdW_IVIOQ4.mp4/_XdW_IVIOQ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_XdW_IVIOQ4.mp4/_XdW_IVIOQ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_XdW_IVIOQ4.m3u8/_XdW_IVIOQ4.m3u8"}, "slug": "sscc-blended-teacherintro", "video_id": "_XdW_IVIOQ4", "youtube_id": "_XdW_IVIOQ4", "readable_id": "sscc-blended-teacherintro"}, "CHHu-iTwHjg": {"duration": 558, "path": "khan/science/biology/energy-and-enzymes/free-energy-tutorial/gibbs-free-energy-and-spontaneous-reactions/", "keywords": "education,online learning,learning,lessons,gibbs free energy,Spontaneous Process,Thermodynamics (Field Of Study)", "id": "CHHu-iTwHjg", "title": "Gibbs free energy and spontaneous reactions", "description": "Gibbs free energy and spontaneous reactions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CHHu-iTwHjg.mp4/CHHu-iTwHjg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CHHu-iTwHjg.mp4/CHHu-iTwHjg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CHHu-iTwHjg.m3u8/CHHu-iTwHjg.m3u8"}, "slug": "gibbs-free-energy-and-spontaneous-reactions", "video_id": "CHHu-iTwHjg", "youtube_id": "CHHu-iTwHjg", "readable_id": "gibbs-free-energy-and-spontaneous-reactions"}, "pdqOIg_QYSc": {"duration": 880, "path": "khan/humanities/ancient-art-civilizations/greek-art/early-classical/east-and-west-pediments-from-the-temple-of-aphaia-aegina-c-490-480-b-c-e/", "keywords": "", "id": "pdqOIg_QYSc", "title": "East and West Pediments, Temple of Aphaia, Aegina", "description": "East and West Pediments from the Temple of Aphaia, Aegina, Archaic/Early Classical Periods, c. 490-480 B.C.E. (Glyptothek, Munich)\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pdqOIg_QYSc.mp4/pdqOIg_QYSc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pdqOIg_QYSc.mp4/pdqOIg_QYSc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pdqOIg_QYSc.m3u8/pdqOIg_QYSc.m3u8"}, "slug": "east-and-west-pediments-from-the-temple-of-aphaia-aegina-c-490-480-b-c-e", "video_id": "pdqOIg_QYSc", "youtube_id": "pdqOIg_QYSc", "readable_id": "east-and-west-pediments-from-the-temple-of-aphaia-aegina-c-490-480-b-c-e"}, "sBvRJUwXJPo": {"duration": 187, "path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/multiply-and-simplify-a-radical-expression-2/", "keywords": "u16_l2_t1_we2, Multiply, and, Simply, Radical, Expression", "id": "sBvRJUwXJPo", "title": "How to simplify a division of two variable square root expressions (example)", "description": "Sal shows how to simplify\u00a0\u221a(60x^2y)/\u221a(48x).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sBvRJUwXJPo.mp4/sBvRJUwXJPo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sBvRJUwXJPo.mp4/sBvRJUwXJPo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sBvRJUwXJPo.m3u8/sBvRJUwXJPo.m3u8"}, "slug": "multiply-and-simplify-a-radical-expression-2", "video_id": "sBvRJUwXJPo", "youtube_id": "sBvRJUwXJPo", "readable_id": "multiply-and-simplify-a-radical-expression-2"}, "jxA8MffVmPs": {"duration": 145, "path": "khan/math/pre-algebra/order-of-operations/place_value/place-value-1/", "keywords": "U01_L1_T1_we1, Place, Value, CC_2_NBT_6", "id": "jxA8MffVmPs", "title": "Finding a number's place value", "description": "When finding the place value of a particular number, it helps to write out exactly what the number means. Listen as we explain in this video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jxA8MffVmPs.mp4/jxA8MffVmPs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jxA8MffVmPs.mp4/jxA8MffVmPs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jxA8MffVmPs.m3u8/jxA8MffVmPs.m3u8"}, "slug": "place-value-1", "video_id": "jxA8MffVmPs", "youtube_id": "jxA8MffVmPs", "readable_id": "place-value-1"}, "a5z-OEIfw3s": {"duration": 345, "path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/fractal-fractions/", "keywords": "fractal, fractions, infinity, mathematics, math, algebra", "id": "a5z-OEIfw3s", "title": "Fractal fractions", "description": "How to make snazzy-lookin' fractal equations using simple algebra. For more abacabadabacaba: http://www.abacaba.org/ and http://books.google.com/books?id=QpPlxwSa8akC&pg=PA60&lpg=PA60&dq=abacabadabacaba+%22martin+gardner%22&source=bl&ots=92eAyvrZGV&sig=J2uvF2DAyn9kY8nSarSy-XIXW74&hl=en&sa=X&ei=Np45T4K9GYixiQK92NG2Bg&ved=0CCEQ6AEwAA#v=onepage&q&f=false", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a5z-OEIfw3s.mp4/a5z-OEIfw3s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a5z-OEIfw3s.mp4/a5z-OEIfw3s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a5z-OEIfw3s.m3u8/a5z-OEIfw3s.m3u8"}, "slug": "fractal-fractions", "video_id": "a5z-OEIfw3s", "youtube_id": "a5z-OEIfw3s", "readable_id": "fractal-fractions"}, "wqnpSzEzq1w": {"duration": 474, "path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/deriving-geometric-series-sum-formula/", "keywords": "", "id": "wqnpSzEzq1w", "title": "Another derivation of the sum of an infinite geometric series", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wqnpSzEzq1w.mp4/wqnpSzEzq1w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wqnpSzEzq1w.mp4/wqnpSzEzq1w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wqnpSzEzq1w.m3u8/wqnpSzEzq1w.m3u8"}, "slug": "deriving-geometric-series-sum-formula", "video_id": "wqnpSzEzq1w", "youtube_id": "wqnpSzEzq1w", "readable_id": "deriving-geometric-series-sum-formula"}, "eGRZKkmI_fo": {"duration": 446, "path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/parametrization-of-a-reverse-path/", "keywords": "parametric, equation, vector, calculus", "id": "eGRZKkmI_fo", "title": "Parametrization of a reverse path", "description": "Understanding how to parametrize a reverse path for the same curve.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eGRZKkmI_fo.mp4/eGRZKkmI_fo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eGRZKkmI_fo.mp4/eGRZKkmI_fo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eGRZKkmI_fo.m3u8/eGRZKkmI_fo.m3u8"}, "slug": "parametrization-of-a-reverse-path", "video_id": "eGRZKkmI_fo", "youtube_id": "eGRZKkmI_fo", "readable_id": "parametrization-of-a-reverse-path"}, "E2VxbufzuWQ": {"duration": 696, "path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/laplace-transform-5/", "keywords": "laplace, transform, linear, derivative", "id": "E2VxbufzuWQ", "title": "Laplace as linear operator and Laplace of derivatives", "description": "Useful properties of the Laplace Transform", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E2VxbufzuWQ.mp4/E2VxbufzuWQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E2VxbufzuWQ.mp4/E2VxbufzuWQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E2VxbufzuWQ.m3u8/E2VxbufzuWQ.m3u8"}, "slug": "laplace-transform-5", "video_id": "E2VxbufzuWQ", "youtube_id": "E2VxbufzuWQ", "readable_id": "laplace-transform-5"}, "MNKXq7c3eQU": {"duration": 433, "path": "khan/science/health-and-medicine/infectious-diseases/influenza/when-flu-viruses-attack/", "keywords": "", "id": "MNKXq7c3eQU", "title": "When flu viruses attack!", "description": "Learn how flu viruses get into and out of your cells using Hemagglutinin and Neuraminidase proteins on their surface. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MNKXq7c3eQU.mp4/MNKXq7c3eQU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MNKXq7c3eQU.mp4/MNKXq7c3eQU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MNKXq7c3eQU.m3u8/MNKXq7c3eQU.m3u8"}, "slug": "when-flu-viruses-attack", "video_id": "MNKXq7c3eQU", "youtube_id": "MNKXq7c3eQU", "readable_id": "when-flu-viruses-attack"}, "zaNUFmhD5PM": {"duration": 167, "path": "khan/partner-content/pixar/animate/ball/intro-animation/", "keywords": "", "id": "zaNUFmhD5PM", "title": "Introduction to animation", "description": "Overview of this topic", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zaNUFmhD5PM.mp4/zaNUFmhD5PM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zaNUFmhD5PM.mp4/zaNUFmhD5PM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zaNUFmhD5PM.m3u8/zaNUFmhD5PM.m3u8"}, "slug": "intro-animation", "video_id": "zaNUFmhD5PM", "youtube_id": "zaNUFmhD5PM", "readable_id": "intro-animation"}, "Yw3EoxC_GXU": {"duration": 183, "path": "khan/math/arithmetic/multiplication-division/multiplication_fun/multiplying-whole-numbers-and-applications-1/", "keywords": "U01_L3_T1_we1, Multiplying, Whole, Numbers, and, Applications, CC_3_OA_5, CC_3_OA_7", "id": "Yw3EoxC_GXU", "title": "Example: Ways to represent multiplication", "description": "Multiplying Whole Numbers and Applications 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Yw3EoxC_GXU.mp4/Yw3EoxC_GXU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Yw3EoxC_GXU.mp4/Yw3EoxC_GXU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Yw3EoxC_GXU.m3u8/Yw3EoxC_GXU.m3u8"}, "slug": "multiplying-whole-numbers-and-applications-1", "video_id": "Yw3EoxC_GXU", "youtube_id": "Yw3EoxC_GXU", "readable_id": "multiplying-whole-numbers-and-applications-1"}, "hx8bYUF30Gg": {"duration": 315, "path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/social-perception-the-halo-effect/", "keywords": "", "id": "hx8bYUF30Gg", "title": "Social perception - The Halo Effect", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hx8bYUF30Gg.mp4/hx8bYUF30Gg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hx8bYUF30Gg.mp4/hx8bYUF30Gg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hx8bYUF30Gg.m3u8/hx8bYUF30Gg.m3u8"}, "slug": "social-perception-the-halo-effect", "video_id": "hx8bYUF30Gg", "youtube_id": "hx8bYUF30Gg", "readable_id": "social-perception-the-halo-effect"}, "m4raOIxsbaU": {"duration": 334, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/battle-of-the-romans-and-barbarians-ludovisi-battle-sarcophagus-c-250-260-c-e/", "keywords": "", "id": "m4raOIxsbaU", "title": "Ludovisi Battle Sarcophagus", "description": "Battle of the Romans and Barbarians (Ludovisi Battle Sarcophagus), c. 250-260 C.E. (Museo Nazionale Romano-Palazzo Altemps, Rome)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m4raOIxsbaU.mp4/m4raOIxsbaU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m4raOIxsbaU.mp4/m4raOIxsbaU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m4raOIxsbaU.m3u8/m4raOIxsbaU.m3u8"}, "slug": "battle-of-the-romans-and-barbarians-ludovisi-battle-sarcophagus-c-250-260-c-e", "video_id": "m4raOIxsbaU", "youtube_id": "m4raOIxsbaU", "readable_id": "battle-of-the-romans-and-barbarians-ludovisi-battle-sarcophagus-c-250-260-c-e"}, "ZRGczIT9Cfc": {"duration": 209, "path": "khan/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture/vishnu-and-krishna/", "keywords": "", "id": "ZRGczIT9Cfc", "title": "The Hindu deities Vishnu and Krishna", "description": "Learn about the Hindu deity Vishnu and his avatar Krishna, and hear a story about Krishna defeating the serpent Kaliya. Learn more about Hindu deities on education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZRGczIT9Cfc.mp4/ZRGczIT9Cfc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZRGczIT9Cfc.mp4/ZRGczIT9Cfc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZRGczIT9Cfc.m3u8/ZRGczIT9Cfc.m3u8"}, "slug": "vishnu-and-krishna", "video_id": "ZRGczIT9Cfc", "youtube_id": "ZRGczIT9Cfc", "readable_id": "vishnu-and-krishna"}, "COZqJb-HT-k": {"duration": 429, "path": "khan/science/organic-chemistry/organic-structures/acid-base-review/stabilization-of-a-conjugate-base-resonance-new/", "keywords": "", "id": "COZqJb-HT-k", "title": "Stabilization of a conjugate base: resonance", "description": "How resonance affects the stability of a conjugate base", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/COZqJb-HT-k.mp4/COZqJb-HT-k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/COZqJb-HT-k.mp4/COZqJb-HT-k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/COZqJb-HT-k.m3u8/COZqJb-HT-k.m3u8"}, "slug": "stabilization-of-a-conjugate-base-resonance-new", "video_id": "COZqJb-HT-k", "youtube_id": "COZqJb-HT-k", "readable_id": "stabilization-of-a-conjugate-base-resonance-new"}, "kdJ6aGToDlo": {"duration": 429, "path": "khan/partner-content/wi-phi/critical-thinking/validity/", "keywords": "", "id": "kdJ6aGToDlo", "title": "Fundamentals: Validity", "description": "Paul Henne discusses the philosophical concept of validity. After reviewing the structure of an argument, he defines validity: an argument is valid if and only if its premises guarantee the conclusion. He reviews a few examples of validity and invalidity, and he leaves you with one example to figure out on your own.\nSpeaker: Paul Henne", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kdJ6aGToDlo.mp4/kdJ6aGToDlo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kdJ6aGToDlo.mp4/kdJ6aGToDlo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kdJ6aGToDlo.m3u8/kdJ6aGToDlo.m3u8"}, "slug": "validity", "video_id": "kdJ6aGToDlo", "youtube_id": "kdJ6aGToDlo", "readable_id": "validity"}, "WhPW50r07L8": {"duration": 260, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/making-greek-vases/", "keywords": "art history", "id": "WhPW50r07L8", "title": "Making Greek vases", "description": "In ancient Greece, the phrase \"to make pottery\" meant to work hard.\u00a0This video from the Getty Museum reveals how the typical Athenian potter prepared clay, threw vases, oversaw firing, and added decoration or employed vase-painters. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WhPW50r07L8.mp4/WhPW50r07L8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WhPW50r07L8.mp4/WhPW50r07L8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WhPW50r07L8.m3u8/WhPW50r07L8.m3u8"}, "slug": "making-greek-vases", "video_id": "WhPW50r07L8", "youtube_id": "WhPW50r07L8", "readable_id": "making-greek-vases"}, "F4Lt0AjMxEY": {"duration": 583, "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/diabetic-nephropathy-mechanisms/", "keywords": "", "id": "F4Lt0AjMxEY", "title": "Diabetic nephropathy - Mechanisms", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F4Lt0AjMxEY.mp4/F4Lt0AjMxEY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F4Lt0AjMxEY.mp4/F4Lt0AjMxEY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F4Lt0AjMxEY.m3u8/F4Lt0AjMxEY.m3u8"}, "slug": "diabetic-nephropathy-mechanisms", "video_id": "F4Lt0AjMxEY", "youtube_id": "F4Lt0AjMxEY", "readable_id": "diabetic-nephropathy-mechanisms"}, "Ax98k35h_jk": {"duration": 512, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/wegeners-granulomatosis-and-microscopic-polyangiitis/", "keywords": "", "id": "Ax98k35h_jk", "title": "Wegener\u2019s granulomatosis and microscopic polyangiitis", "description": "Wegener\u2019s granulomatosis (also known as granulomatosis with polyangiitis) is a type of vasculitis that affects small and medium blood vessels. Symptoms can include saddle nose deformity, chronic sinusitis, and collapsed trachea. Microscopic polyangiitis is similar to wegener\u2019s granulomatosis except it only affects small blood vessels in the lungs or kidneys. Learn how the presence of granulomas and antibodies (cANCA and pANCA) differentiate these two conditions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ax98k35h_jk.mp4/Ax98k35h_jk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ax98k35h_jk.mp4/Ax98k35h_jk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ax98k35h_jk.m3u8/Ax98k35h_jk.m3u8"}, "slug": "wegeners-granulomatosis-and-microscopic-polyangiitis", "video_id": "Ax98k35h_jk", "youtube_id": "Ax98k35h_jk", "readable_id": "wegeners-granulomatosis-and-microscopic-polyangiitis"}, "ko-cYG3d6ec": {"duration": 589, "path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/angle-game-part-2/", "keywords": "geometry, angles, complementary, triangle, supplementary, math, CC_7_G_5, CC_8_G_5", "id": "ko-cYG3d6ec", "title": "Angle game (part 2)", "description": "More examples of the Angle Game.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ko-cYG3d6ec.mp4/ko-cYG3d6ec.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ko-cYG3d6ec.mp4/ko-cYG3d6ec.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ko-cYG3d6ec.m3u8/ko-cYG3d6ec.m3u8"}, "slug": "angle-game-part-2", "video_id": "ko-cYG3d6ec", "youtube_id": "ko-cYG3d6ec", "readable_id": "angle-game-part-2"}, "SdHwokUU8xI": {"duration": 318, "path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/we-graph-of-cosine-function/", "keywords": "cos, cosine, graph", "id": "SdHwokUU8xI", "title": "Example: Graph of cosine", "description": "Basic interpretation of the graph of the cosine function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SdHwokUU8xI.mp4/SdHwokUU8xI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SdHwokUU8xI.mp4/SdHwokUU8xI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SdHwokUU8xI.m3u8/SdHwokUU8xI.m3u8"}, "slug": "we-graph-of-cosine-function", "video_id": "SdHwokUU8xI", "youtube_id": "SdHwokUU8xI", "readable_id": "we-graph-of-cosine-function"}, "4xOsAuj0QZg": {"duration": 295, "path": "khan/science/biology/energy-and-enzymes/enzyme-regulation/noncompetitive-inhibition/", "keywords": "education,online learning,learning,lessons,noncompetitive inhibition,allosteric,active site,enzyme,Enzyme Inhibitor (Protein)", "id": "4xOsAuj0QZg", "title": "Noncompetitive inhibition", "description": "Seeing how a noncompetitive inhibitor can bind whether or not the substrate is bound, and vice versa. It will often do this at an allosteric site, but may also bind at or near the active site.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4xOsAuj0QZg.mp4/4xOsAuj0QZg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4xOsAuj0QZg.mp4/4xOsAuj0QZg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4xOsAuj0QZg.m3u8/4xOsAuj0QZg.m3u8"}, "slug": "noncompetitive-inhibition", "video_id": "4xOsAuj0QZg", "youtube_id": "4xOsAuj0QZg", "readable_id": "noncompetitive-inhibition"}, "-7kSDHFXwZ4": {"duration": 594, "path": "khan/humanities/history/1600s-1800s/declaration-of-independence/tyranny-and-despotism/", "keywords": "", "id": "-7kSDHFXwZ4", "title": "Tyranny and despotism", "description": "In this video, Aspen Institute President and CEO Walter Isaacson\u00a0talks to Sal about \u00a0the Declaration of Independence.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-7kSDHFXwZ4.mp4/-7kSDHFXwZ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-7kSDHFXwZ4.mp4/-7kSDHFXwZ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-7kSDHFXwZ4.m3u8/-7kSDHFXwZ4.m3u8"}, "slug": "tyranny-and-despotism", "video_id": "-7kSDHFXwZ4", "youtube_id": "-7kSDHFXwZ4", "readable_id": "tyranny-and-despotism"}, "1AqkBdCBm9o": {"duration": 114, "path": "khan/math/early-math/cc-early-math-counting-topic/cc-early-math-numbers-120/numbers-to-120/", "keywords": "", "id": "1AqkBdCBm9o", "title": "Missing numbers between 0 and 120", "description": "Learn how to find missing numbers between 0 and 120.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1AqkBdCBm9o.mp4/1AqkBdCBm9o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1AqkBdCBm9o.mp4/1AqkBdCBm9o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1AqkBdCBm9o.m3u8/1AqkBdCBm9o.m3u8"}, "slug": "numbers-to-120", "video_id": "1AqkBdCBm9o", "youtube_id": "1AqkBdCBm9o", "readable_id": "numbers-to-120"}, "4mrp5uI9anE": {"duration": 337, "path": "khan/test-prep/mcat/biomolecules/genetic-mutations/mutagens-and-carcinogens/", "keywords": "MCAT", "id": "4mrp5uI9anE", "title": "Mutagens and carcinogens", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4mrp5uI9anE.mp4/4mrp5uI9anE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4mrp5uI9anE.mp4/4mrp5uI9anE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4mrp5uI9anE.m3u8/4mrp5uI9anE.m3u8"}, "slug": "mutagens-and-carcinogens", "video_id": "4mrp5uI9anE", "youtube_id": "4mrp5uI9anE", "readable_id": "mutagens-and-carcinogens"}, "wSiamij_i_k": {"duration": 404, "path": "khan/math/algebra2/manipulating-functions/finding-inverse-functions/function-inverse-example-1/", "keywords": "Function, Inverse, Example, CC_39336_F-BF_4, CC_39336_F-BF_4_a, CC_39336_F-BF_4_b", "id": "wSiamij_i_k", "title": "How to find the inverse of a linear function (example)", "description": "Sal finds the inverses of f(x)=-x+4 and g(x)=-2x-1.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wSiamij_i_k.mp4/wSiamij_i_k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wSiamij_i_k.mp4/wSiamij_i_k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wSiamij_i_k.m3u8/wSiamij_i_k.m3u8"}, "slug": "function-inverse-example-1", "video_id": "wSiamij_i_k", "youtube_id": "wSiamij_i_k", "readable_id": "function-inverse-example-1"}, "PYZhVX6rr08": {"duration": 388, "path": "khan/test-prep/mcat/social-inequality/social-class/residential-segregation/", "keywords": "", "id": "PYZhVX6rr08", "title": "Residential segregation", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PYZhVX6rr08.mp4/PYZhVX6rr08.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PYZhVX6rr08.mp4/PYZhVX6rr08.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PYZhVX6rr08.m3u8/PYZhVX6rr08.m3u8"}, "slug": "residential-segregation", "video_id": "PYZhVX6rr08", "youtube_id": "PYZhVX6rr08", "readable_id": "residential-segregation"}, "9Ek61w1LxSc": {"duration": 666, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/equations_beginner/simple-equations/", "keywords": "algebra, introduction, CC_6_EE_5, CC_7_EE_1, CC_7_EE_4", "id": "9Ek61w1LxSc", "title": "How to solve equations of the form ax = b", "description": "Let's ease into this, shall we? Here's an introduction to basic algebraic equations of the form ax=b. Remember that you can check to see if you have the right answer by substituting it for the variable!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9Ek61w1LxSc.mp4/9Ek61w1LxSc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9Ek61w1LxSc.mp4/9Ek61w1LxSc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9Ek61w1LxSc.m3u8/9Ek61w1LxSc.m3u8"}, "slug": "simple-equations", "video_id": "9Ek61w1LxSc", "youtube_id": "9Ek61w1LxSc", "readable_id": "simple-equations"}, "UFWAu8Ptth0": {"duration": 584, "path": "khan/math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order/2nd-order-linear-homogeneous-differential-equations-1/", "keywords": "2nd, Order, Linear, Homogeneous, Differential, Equations", "id": "UFWAu8Ptth0", "title": "2nd order linear homogeneous differential equations 1", "description": "Introduction to 2nd order, linear, homogeneous differential equations with constant coefficients.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UFWAu8Ptth0.mp4/UFWAu8Ptth0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UFWAu8Ptth0.mp4/UFWAu8Ptth0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UFWAu8Ptth0.m3u8/UFWAu8Ptth0.m3u8"}, "slug": "2nd-order-linear-homogeneous-differential-equations-1", "video_id": "UFWAu8Ptth0", "youtube_id": "UFWAu8Ptth0", "readable_id": "2nd-order-linear-homogeneous-differential-equations-1"}, "ahdKdxsTj8E": {"duration": 121, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/adding-and-subtracting-polynomials-1/", "keywords": "U08_L2_T2_we1, Adding, and, Subtracting, Polynomials, CC_39336_A-APR_1", "id": "ahdKdxsTj8E", "title": "How to add two polynomials (example)", "description": "Sal simplifies (5x^2 + 8x - 3) + (2x^2 - 7x + 13x).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ahdKdxsTj8E.mp4/ahdKdxsTj8E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ahdKdxsTj8E.mp4/ahdKdxsTj8E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ahdKdxsTj8E.m3u8/ahdKdxsTj8E.m3u8"}, "slug": "adding-and-subtracting-polynomials-1", "video_id": "ahdKdxsTj8E", "youtube_id": "ahdKdxsTj8E", "readable_id": "adding-and-subtracting-polynomials-1"}, "xt2M4HTw29A": {"duration": 273, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/leyster-self/", "keywords": "Judith Leyster, Self-Portrait, 1633, National Gallery of Art", "id": "xt2M4HTw29A", "title": "Judith Leyster, Self-Portrait", "description": "Judith Leyster, Self-Portrait, c. 1633, oil on canvas, 74.6 x 65.1 cm / 29-3/8 x 25-5/8 inches (National Gallery of Art)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xt2M4HTw29A.mp4/xt2M4HTw29A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xt2M4HTw29A.mp4/xt2M4HTw29A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xt2M4HTw29A.m3u8/xt2M4HTw29A.m3u8"}, "slug": "leyster-self", "video_id": "xt2M4HTw29A", "youtube_id": "xt2M4HTw29A", "readable_id": "leyster-self"}, "aKAw-DyZa6g": {"duration": 257, "path": "khan/math/probability/statistical-studies/statistical-questions/reasonable-samples/", "keywords": "", "id": "aKAw-DyZa6g", "title": "Reasonable samples", "description": "To make a valid conclusion, you'll need a representaive, not skewed, sample.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aKAw-DyZa6g.mp4/aKAw-DyZa6g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aKAw-DyZa6g.mp4/aKAw-DyZa6g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aKAw-DyZa6g.m3u8/aKAw-DyZa6g.m3u8"}, "slug": "reasonable-samples", "video_id": "aKAw-DyZa6g", "youtube_id": "aKAw-DyZa6g", "readable_id": "reasonable-samples"}, "-xYkTJFbuM0": {"duration": 660, "path": "khan/math/recreational-math/puzzles/brain-teasers/blue-forehead-room-solution/", "keywords": "brain, teaser, recursion", "id": "-xYkTJFbuM0", "title": "Blue forehead room solution", "description": "Do not watch before Blue Forehead Room. THIS IS THE SOLUTION!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-xYkTJFbuM0.mp4/-xYkTJFbuM0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-xYkTJFbuM0.mp4/-xYkTJFbuM0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-xYkTJFbuM0.m3u8/-xYkTJFbuM0.m3u8"}, "slug": "blue-forehead-room-solution", "video_id": "-xYkTJFbuM0", "youtube_id": "-xYkTJFbuM0", "readable_id": "blue-forehead-room-solution"}, "Pz-uLRZS8YM": {"duration": 677, "path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/carbohydrates-epimers-common-names/", "keywords": "", "id": "Pz-uLRZS8YM", "title": "Carbohydrates - Epimers, common names", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Pz-uLRZS8YM.mp4/Pz-uLRZS8YM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Pz-uLRZS8YM.mp4/Pz-uLRZS8YM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Pz-uLRZS8YM.m3u8/Pz-uLRZS8YM.m3u8"}, "slug": "carbohydrates-epimers-common-names", "video_id": "Pz-uLRZS8YM", "youtube_id": "Pz-uLRZS8YM", "readable_id": "carbohydrates-epimers-common-names"}, "2N62v_63SBo": {"duration": 1266, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/asymptotes-of-rational-functions/", "keywords": "Asymptotes, of, Rational, Functions, CC_39336_F-IF_7_d", "id": "2N62v_63SBo", "title": "How to graph a rational function (example)", "description": "Sal graphs y=(x^2)/(x^2-16).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2N62v_63SBo.mp4/2N62v_63SBo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2N62v_63SBo.mp4/2N62v_63SBo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2N62v_63SBo.m3u8/2N62v_63SBo.m3u8"}, "slug": "asymptotes-of-rational-functions", "video_id": "2N62v_63SBo", "youtube_id": "2N62v_63SBo", "readable_id": "asymptotes-of-rational-functions"}, "XstL_x4ucm4": {"duration": 331, "path": "khan/math/algebra/systems-of-linear-equations/equivalent-systems-of-equations/identifying-equivalent-systems-of-equations/", "keywords": "education,online learning,learning,lessons", "id": "XstL_x4ucm4", "title": "How to identify equivalent systems of equations (example)", "description": "Sal analyzes a couple of systems of equations and determines whether they have the same solution as a third given system.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XstL_x4ucm4.mp4/XstL_x4ucm4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XstL_x4ucm4.mp4/XstL_x4ucm4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XstL_x4ucm4.m3u8/XstL_x4ucm4.m3u8"}, "slug": "identifying-equivalent-systems-of-equations", "video_id": "XstL_x4ucm4", "youtube_id": "XstL_x4ucm4", "readable_id": "identifying-equivalent-systems-of-equations"}, "Ax8vcxRtmHY": {"duration": 223, "path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/kouros-youth-archaic-greek-c-590-580-b-c-e/", "keywords": "Kouros, Ancient Greece, Smarthistory, Art History, Greek, ancient, sculpture, Metropolitan", "id": "Ax8vcxRtmHY", "title": "New York Kouros", "description": "Marble Statue of a Kouros (New York Kouros), c. 590\u2013580 B.C.E. (Attic, archaic), Naxian marble, 194.6 x 51.6 cm (The Metropolitan Museum of Art)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ax8vcxRtmHY.mp4/Ax8vcxRtmHY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ax8vcxRtmHY.mp4/Ax8vcxRtmHY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ax8vcxRtmHY.m3u8/Ax8vcxRtmHY.m3u8"}, "slug": "kouros-youth-archaic-greek-c-590-580-b-c-e", "video_id": "Ax8vcxRtmHY", "youtube_id": "Ax8vcxRtmHY", "readable_id": "kouros-youth-archaic-greek-c-590-580-b-c-e"}, "SXYeQDrH36Y": {"duration": 634, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/what-is-cardiomyopathy/", "keywords": "", "id": "SXYeQDrH36Y", "title": "What is cardiomyopathy?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SXYeQDrH36Y.mp4/SXYeQDrH36Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SXYeQDrH36Y.mp4/SXYeQDrH36Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SXYeQDrH36Y.m3u8/SXYeQDrH36Y.m3u8"}, "slug": "what-is-cardiomyopathy", "video_id": "SXYeQDrH36Y", "youtube_id": "SXYeQDrH36Y", "readable_id": "what-is-cardiomyopathy"}, "MHtTP6vc4RU": {"duration": 212, "path": "khan/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem/polynomial-remainder-theorem-example/", "keywords": "", "id": "MHtTP6vc4RU", "title": "How to find the remainder of a polynomial division using the Polynomial Remainder Theorem (example)", "description": "Sal finds the remainder of (-3x^3-4x^2+10x-7) divided by (x-2) using the PRT (Polynomial Remainder Theorem).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MHtTP6vc4RU.mp4/MHtTP6vc4RU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MHtTP6vc4RU.mp4/MHtTP6vc4RU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MHtTP6vc4RU.m3u8/MHtTP6vc4RU.m3u8"}, "slug": "polynomial-remainder-theorem-example", "video_id": "MHtTP6vc4RU", "youtube_id": "MHtTP6vc4RU", "readable_id": "polynomial-remainder-theorem-example"}, "LVMLs2z1JYg": {"duration": 335, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/leveraged-buy-outs/basic-leveraged-buyout-lbo/", "keywords": "private, equity, finance", "id": "LVMLs2z1JYg", "title": "Basic leveraged buyout (LBO)", "description": "The mechanics of a simple leveraged buy-out", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LVMLs2z1JYg.mp4/LVMLs2z1JYg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LVMLs2z1JYg.mp4/LVMLs2z1JYg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LVMLs2z1JYg.m3u8/LVMLs2z1JYg.m3u8"}, "slug": "basic-leveraged-buyout-lbo", "video_id": "LVMLs2z1JYg", "youtube_id": "LVMLs2z1JYg", "readable_id": "basic-leveraged-buyout-lbo"}, "DhqHyHhibJw": {"duration": 175, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-linear-equation-easier/", "keywords": "", "id": "DhqHyHhibJw", "title": "Linear equation word problems \u2014 Basic example", "description": "Watch Sal work through a basic Linear equations word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DhqHyHhibJw.mp4/DhqHyHhibJw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DhqHyHhibJw.mp4/DhqHyHhibJw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DhqHyHhibJw.m3u8/DhqHyHhibJw.m3u8"}, "slug": "sat-linear-equation-easier", "video_id": "DhqHyHhibJw", "youtube_id": "DhqHyHhibJw", "readable_id": "sat-linear-equation-easier"}, "_yvdb_0NGT8": {"duration": 367, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/formation-of-nitrate-esters/", "keywords": "", "id": "_yvdb_0NGT8", "title": "Formation of nitrate esters", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_yvdb_0NGT8.mp4/_yvdb_0NGT8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_yvdb_0NGT8.mp4/_yvdb_0NGT8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_yvdb_0NGT8.m3u8/_yvdb_0NGT8.m3u8"}, "slug": "formation-of-nitrate-esters", "video_id": "_yvdb_0NGT8", "youtube_id": "_yvdb_0NGT8", "readable_id": "formation-of-nitrate-esters"}, "FgVkgR1bXvY": {"duration": 273, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/pierre-le-gros-the-younger-stanislas-kostka-on-his-deathbed-1703/", "keywords": "Baroque, Smarthistory, Art, Art History, Pierre Le Gros, Stanislas Kostka, Bernini, Rome", "id": "FgVkgR1bXvY", "title": "Pierre Le Gros the Younger, Stanislas Kostka on his Deathbed", "description": "Pierre Le Gros the Younger, Stanislas Kostka on His Deathbed, 1703, upstairs at Bernini's Sant'Andrea al Quirinale\n\nSpeakers: Frank Dabbell, Beth Harris and Steven Zucker \n\nA Smarthistory.org video", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FgVkgR1bXvY.mp4/FgVkgR1bXvY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FgVkgR1bXvY.mp4/FgVkgR1bXvY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FgVkgR1bXvY.m3u8/FgVkgR1bXvY.m3u8"}, "slug": "pierre-le-gros-the-younger-stanislas-kostka-on-his-deathbed-1703", "video_id": "FgVkgR1bXvY", "youtube_id": "FgVkgR1bXvY", "readable_id": "pierre-le-gros-the-younger-stanislas-kostka-on-his-deathbed-1703"}, "OBVGQt1Eeug": {"duration": 403, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/more-equation-practice/mixture-problems-2/", "keywords": "U06_L2_T2_we2, Mixture, problems, CC_7_RP_2, CC_7_RP_2_b, CC_7_RP_2_c, CC_7_RP_3, CC_39336_A-CED_2, CC_39336_A-REI_1", "id": "OBVGQt1Eeug", "title": "Mixture problems 2", "description": "Mixture problems 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OBVGQt1Eeug.mp4/OBVGQt1Eeug.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OBVGQt1Eeug.mp4/OBVGQt1Eeug.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OBVGQt1Eeug.m3u8/OBVGQt1Eeug.m3u8"}, "slug": "mixture-problems-2", "video_id": "OBVGQt1Eeug", "youtube_id": "OBVGQt1Eeug", "readable_id": "mixture-problems-2"}, "0Xxm2SGuGTk": {"duration": 181, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/reliquaries-manuscripts-tapestries/holy-thorn-reliquary/", "keywords": "", "id": "0Xxm2SGuGTk", "title": "The Holy Thorn Reliquary of Jean, duc de Berry", "description": "The Holy Thorn Reliquary houses one of the most important relics of all time - a thorn from the Crown of Thorns that was put on Christ's head during the Crucifixion. \u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0Xxm2SGuGTk.mp4/0Xxm2SGuGTk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0Xxm2SGuGTk.mp4/0Xxm2SGuGTk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0Xxm2SGuGTk.m3u8/0Xxm2SGuGTk.m3u8"}, "slug": "holy-thorn-reliquary", "video_id": "0Xxm2SGuGTk", "youtube_id": "0Xxm2SGuGTk", "readable_id": "holy-thorn-reliquary"}, "5D1gV37bKXY": {"duration": 385, "path": "khan/math/probability/statistical-studies/hypothesis-test/simple-hypothesis-testing/", "keywords": "", "id": "5D1gV37bKXY", "title": "Simple hypothesis testing", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5D1gV37bKXY.mp4/5D1gV37bKXY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5D1gV37bKXY.mp4/5D1gV37bKXY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5D1gV37bKXY.m3u8/5D1gV37bKXY.m3u8"}, "slug": "simple-hypothesis-testing", "video_id": "5D1gV37bKXY", "youtube_id": "5D1gV37bKXY", "readable_id": "simple-hypothesis-testing"}, "nGCW5teACC0": {"duration": 325, "path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/tangent-slope-as-limiting-value-of-secant-slope-example-1/", "keywords": "", "id": "nGCW5teACC0", "title": "Tangent slope as limiting value of secant slope example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nGCW5teACC0.mp4/nGCW5teACC0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nGCW5teACC0.mp4/nGCW5teACC0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nGCW5teACC0.m3u8/nGCW5teACC0.m3u8"}, "slug": "tangent-slope-as-limiting-value-of-secant-slope-example-1", "video_id": "nGCW5teACC0", "youtube_id": "nGCW5teACC0", "readable_id": "tangent-slope-as-limiting-value-of-secant-slope-example-1"}, "hpY22uSAPAA": {"duration": 442, "path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/paul-troost-house-of-german-art-1933-37/", "keywords": "", "id": "hpY22uSAPAA", "title": "Troost, House of German Art and the Entartete Kunst exhibition", "description": "Paul Troost's the House of (German) Art, 1933-37 is discussed in relation to the Great Exhibition of German Art and the Entartete Kunst Exhibitions of 1937 in Munich. The House of German Art now exhibits international contemporary art in direct opposition to the original National Socialist intent.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hpY22uSAPAA.mp4/hpY22uSAPAA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hpY22uSAPAA.mp4/hpY22uSAPAA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hpY22uSAPAA.m3u8/hpY22uSAPAA.m3u8"}, "slug": "paul-troost-house-of-german-art-1933-37", "video_id": "hpY22uSAPAA", "youtube_id": "hpY22uSAPAA", "readable_id": "paul-troost-house-of-german-art-1933-37"}, "PNXozoJWsWc": {"duration": 627, "path": "khan/math/algebra/linear_inequalities/inequalities/inequalities-using-multiplication-and-division/", "keywords": "Inequalities, Using, Multiplication, and, Division, CC_39336_A-REI_3", "id": "PNXozoJWsWc", "title": "Multiplying and dividing with inequalities", "description": "Our discussion of linear inequalities begins with multiplying and dividing by negative numbers. Listen closely for the word \"swap.\" Super important!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PNXozoJWsWc.mp4/PNXozoJWsWc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PNXozoJWsWc.mp4/PNXozoJWsWc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PNXozoJWsWc.m3u8/PNXozoJWsWc.m3u8"}, "slug": "inequalities-using-multiplication-and-division", "video_id": "PNXozoJWsWc", "youtube_id": "PNXozoJWsWc", "readable_id": "inequalities-using-multiplication-and-division"}, "EINpkcphsPQ": {"duration": 536, "path": "khan/math/geometry/right_triangles_topic/pythagorean_proofs/garfield-s-proof-of-the-pythagorean-theorem/", "keywords": "pythagoras", "id": "EINpkcphsPQ", "title": "Garfield's proof of the Pythagorean theorem", "description": "James Garfield's proof of the Pythagorean Theorem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EINpkcphsPQ.mp4/EINpkcphsPQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EINpkcphsPQ.mp4/EINpkcphsPQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EINpkcphsPQ.m3u8/EINpkcphsPQ.m3u8"}, "slug": "garfield-s-proof-of-the-pythagorean-theorem", "video_id": "EINpkcphsPQ", "youtube_id": "EINpkcphsPQ", "readable_id": "garfield-s-proof-of-the-pythagorean-theorem"}, "cGhKJYfXW-c": {"duration": 597, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/arterial-stiffness/compliance-and-elastance/", "keywords": "", "id": "cGhKJYfXW-c", "title": "Compliance and elastance", "description": "Learn about compliance (and elastance) of arteries, veins, and lead pipes! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cGhKJYfXW-c.mp4/cGhKJYfXW-c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cGhKJYfXW-c.mp4/cGhKJYfXW-c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cGhKJYfXW-c.m3u8/cGhKJYfXW-c.m3u8"}, "slug": "compliance-and-elastance", "video_id": "cGhKJYfXW-c", "youtube_id": "cGhKJYfXW-c", "readable_id": "compliance-and-elastance"}, "4BNIGTHUTTM": {"duration": 251, "path": "khan/math/early-math/cc-early-math-add-sub-1000/cc-early-math-sub-ones-tens-hundreds/subtracting-hundreds-and-tens/", "keywords": "", "id": "4BNIGTHUTTM", "title": "Subtracting ten or one hundred", "description": "Learn how to subtract 1, 10, or 100 from a number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4BNIGTHUTTM.mp4/4BNIGTHUTTM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4BNIGTHUTTM.mp4/4BNIGTHUTTM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4BNIGTHUTTM.m3u8/4BNIGTHUTTM.m3u8"}, "slug": "subtracting-hundreds-and-tens", "video_id": "4BNIGTHUTTM", "youtube_id": "4BNIGTHUTTM", "readable_id": "subtracting-hundreds-and-tens"}, "d-2Lcp0QKfI": {"duration": 317, "path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-trinomials-by-grouping-6/", "keywords": "U09_L1_T3_we3, Factoring, Trinomials, by, Grouping, CC_39336_A-SSE_1_a, CC_39336_A-SSE_2", "id": "d-2Lcp0QKfI", "title": "How to factor quadratics by taking a negative common factor and grouping (example)", "description": "Sal factors -12f^2-38f+22 as -2(2f-1)(3f+11).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d-2Lcp0QKfI.mp4/d-2Lcp0QKfI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d-2Lcp0QKfI.mp4/d-2Lcp0QKfI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d-2Lcp0QKfI.m3u8/d-2Lcp0QKfI.m3u8"}, "slug": "factoring-trinomials-by-grouping-6", "video_id": "d-2Lcp0QKfI", "youtube_id": "d-2Lcp0QKfI", "readable_id": "factoring-trinomials-by-grouping-6"}, "VpVu25KhozQ": {"duration": 292, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds/closed-end-mutual-funds/", "keywords": "finance, investing", "id": "VpVu25KhozQ", "title": "Closed-end mutual funds", "description": "Comparing closed-end and open-ended mutual funds", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VpVu25KhozQ.mp4/VpVu25KhozQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VpVu25KhozQ.mp4/VpVu25KhozQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VpVu25KhozQ.m3u8/VpVu25KhozQ.m3u8"}, "slug": "closed-end-mutual-funds", "video_id": "VpVu25KhozQ", "youtube_id": "VpVu25KhozQ", "readable_id": "closed-end-mutual-funds"}, "LJmFbcaxDPE": {"duration": 894, "path": "khan/science/chemistry/acid-base-equilibrium/buffer-solutions/buffers-and-hendersen-hasselbalch/", "keywords": "Buffers, and, the, Hendersen-Hasselbalch, equation", "id": "LJmFbcaxDPE", "title": "Buffers and Henderson-Hasselbalch", "description": "Getting an intuitive understanding of buffers using le Chatelier's principle. Derivation of the Henderson-Hasselbalch equation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LJmFbcaxDPE.mp4/LJmFbcaxDPE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LJmFbcaxDPE.mp4/LJmFbcaxDPE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LJmFbcaxDPE.m3u8/LJmFbcaxDPE.m3u8"}, "slug": "buffers-and-hendersen-hasselbalch", "video_id": "LJmFbcaxDPE", "youtube_id": "LJmFbcaxDPE", "readable_id": "buffers-and-hendersen-hasselbalch"}, "a4nfbZYZ3SI": {"duration": 704, "path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-23/", "keywords": "crash course", "id": "a4nfbZYZ3SI", "title": "The Columbian Exchange", "description": "In which John Green teaches you about the changes wrought by contact between the Old World and the New. John does this by exploring the totally awesome history book \"The Columbian Exchange\" by Alfred Cosby, Jr. After Columbus \"discovered\" the Americas, European conquerors, traders, and settlers brought all manner of changes to the formerly isolated continents. Disease and invasive plant and animal species remade the New World, usually in negative ways. While native people, plants, and animals were being displaced in the Americas, the rest of the world was benefitting from American imports, especially foods like maize, tomatoes, potatoes, pineapple, blueberries, sweet potatoes, and manioc. Was the Columbian Exchange a net positive? It's debatable. So debate.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a4nfbZYZ3SI.mp4/a4nfbZYZ3SI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a4nfbZYZ3SI.mp4/a4nfbZYZ3SI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a4nfbZYZ3SI.m3u8/a4nfbZYZ3SI.m3u8"}, "slug": "crash-course-world-history-23", "video_id": "a4nfbZYZ3SI", "youtube_id": "a4nfbZYZ3SI", "readable_id": "crash-course-world-history-23"}, "xdiBjypYFRQ": {"duration": 591, "path": "khan/math/algebra2/polynomial-and-rational/quad_ineq/quadratic-inequalities-visual-explanation/", "keywords": "Algebra, Math, Khan", "id": "xdiBjypYFRQ", "title": "Quadratic inequalities (visual explanation)", "description": "How to solve a quadratic inequality. Visual intuition of what a quadratic inequality means.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xdiBjypYFRQ.mp4/xdiBjypYFRQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xdiBjypYFRQ.mp4/xdiBjypYFRQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xdiBjypYFRQ.m3u8/xdiBjypYFRQ.m3u8"}, "slug": "quadratic-inequalities-visual-explanation", "video_id": "xdiBjypYFRQ", "youtube_id": "xdiBjypYFRQ", "readable_id": "quadratic-inequalities-visual-explanation"}, "nLCNoT79_-o": {"duration": 405, "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/small-intestine-part-2-digestion/", "keywords": "MCAT", "id": "nLCNoT79_-o", "title": "Small intestine 2: Digestion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nLCNoT79_-o.mp4/nLCNoT79_-o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nLCNoT79_-o.mp4/nLCNoT79_-o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nLCNoT79_-o.m3u8/nLCNoT79_-o.m3u8"}, "slug": "small-intestine-part-2-digestion", "video_id": "nLCNoT79_-o", "youtube_id": "nLCNoT79_-o", "readable_id": "small-intestine-part-2-digestion"}, "6ElH8dKuAsY": {"duration": 218, "path": "khan/science/physics/ask-a-physicist/ask-a-physicist-tutorial/ama-physics-khan-video/", "keywords": "", "id": "6ElH8dKuAsY", "title": "Ask me anything (archived)", "description": "Unfortunately this ask me anything session is now over. Thanks to everyone for participating, whether you asked questions or answered them. There were a ton of amazing and interesting questions. Also, many that I want to think more about. You do the same and hopefully we can have another one of these in the future. Well done everyone!\n\nHi everyone, I'm David and I love physics. Have a physics question/comment? I'll be checking the comments section every couple hours until Sunday August 2nd at 12:00 PM PST and replying as often as possible.\u00a0Also, please feel free to answer other people's questions if you know the answer.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6ElH8dKuAsY.mp4/6ElH8dKuAsY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6ElH8dKuAsY.mp4/6ElH8dKuAsY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6ElH8dKuAsY.m3u8/6ElH8dKuAsY.m3u8"}, "slug": "ama-physics-khan-video", "video_id": "6ElH8dKuAsY", "youtube_id": "6ElH8dKuAsY", "readable_id": "ama-physics-khan-video"}, "L4F2lgyi7FA": {"duration": 244, "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/leonardo-the-virgin-and-child-with-st-anne-and-st-john-the-baptist-1499-1500/", "keywords": "Art, Art History, Leonardo, London, National Gallery, Virgin and Child, Smarthistory", "id": "L4F2lgyi7FA", "title": "Leonardo, Virgin and Child with St Anne and St John the Baptist (Burlington House Cartoon)", "description": "Leonardo da Vinci, The Virgin and Child with St Anne and St John the Baptist (Burlington House Cartoon), 1499-1500, charcoal and chalk on paper, 55.7 \u00d7 41.2 inches \nc. 1499-1500 (National Gallery, London)\n\nhttp://www.smarthistory.org/the-virgin-and-child-with-st-anne-and-st-john-the-baptist.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L4F2lgyi7FA.mp4/L4F2lgyi7FA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L4F2lgyi7FA.mp4/L4F2lgyi7FA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L4F2lgyi7FA.m3u8/L4F2lgyi7FA.m3u8"}, "slug": "leonardo-the-virgin-and-child-with-st-anne-and-st-john-the-baptist-1499-1500", "video_id": "L4F2lgyi7FA", "youtube_id": "L4F2lgyi7FA", "readable_id": "leonardo-the-virgin-and-child-with-st-anne-and-st-john-the-baptist-1499-1500"}, "PtKAeihnbv0": {"duration": 502, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/membrane-potentials-part-1/", "keywords": "", "id": "PtKAeihnbv0", "title": "Membrane potentials - part 1", "description": "Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PtKAeihnbv0.mp4/PtKAeihnbv0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PtKAeihnbv0.mp4/PtKAeihnbv0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PtKAeihnbv0.m3u8/PtKAeihnbv0.m3u8"}, "slug": "membrane-potentials-part-1", "video_id": "PtKAeihnbv0", "youtube_id": "PtKAeihnbv0", "readable_id": "membrane-potentials-part-1"}, "kWucfgOkCIQ": {"duration": 888, "path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-of-a-weak-base-with-a-strong-acid-continued/", "keywords": "", "id": "kWucfgOkCIQ", "title": "Titration of a weak base with a strong acid (continued)", "description": "Calculating the pH for titration of weak base, ammonia, with strong acid, HCl, at the equivalence point and past the equivalence point.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kWucfgOkCIQ.mp4/kWucfgOkCIQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kWucfgOkCIQ.mp4/kWucfgOkCIQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kWucfgOkCIQ.m3u8/kWucfgOkCIQ.m3u8"}, "slug": "titration-of-a-weak-base-with-a-strong-acid-continued", "video_id": "kWucfgOkCIQ", "youtube_id": "kWucfgOkCIQ", "readable_id": "titration-of-a-weak-base-with-a-strong-acid-continued"}, "A9Km337z15k": {"duration": 318, "path": "khan/computing/computer-science/cryptography/modern-crypt/checkpoint-advanced-lessons/", "keywords": "brit cruise, cryptography", "id": "A9Km337z15k", "title": "What should we learn next?", "description": "Help decide what's next! What do you want to learn?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A9Km337z15k.mp4/A9Km337z15k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A9Km337z15k.mp4/A9Km337z15k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A9Km337z15k.m3u8/A9Km337z15k.m3u8"}, "slug": "checkpoint-advanced-lessons", "video_id": "A9Km337z15k", "youtube_id": "A9Km337z15k", "readable_id": "checkpoint-advanced-lessons"}, "Uz0MtFlLD-k": {"duration": 417, "path": "khan/math/algebra2/functions-and-graphs/function-introduction/relations-and-functions/", "keywords": "u17_l1_t1_we2, Relations, and, Functions", "id": "Uz0MtFlLD-k", "title": "Relations and functions", "description": "Relations and Functions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Uz0MtFlLD-k.mp4/Uz0MtFlLD-k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Uz0MtFlLD-k.mp4/Uz0MtFlLD-k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Uz0MtFlLD-k.m3u8/Uz0MtFlLD-k.m3u8"}, "slug": "relations-and-functions", "video_id": "Uz0MtFlLD-k", "youtube_id": "Uz0MtFlLD-k", "readable_id": "relations-and-functions"}, "NAW1pqHs2_c": {"duration": 565, "path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/mixed-crossed-aldol-condensation/", "keywords": "", "id": "NAW1pqHs2_c", "title": "Mixed (crossed) aldol condensation", "description": "How to find the product of a mixed (crossed) aldol condensation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NAW1pqHs2_c.mp4/NAW1pqHs2_c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NAW1pqHs2_c.mp4/NAW1pqHs2_c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NAW1pqHs2_c.m3u8/NAW1pqHs2_c.m3u8"}, "slug": "mixed-crossed-aldol-condensation", "video_id": "NAW1pqHs2_c", "youtube_id": "NAW1pqHs2_c", "readable_id": "mixed-crossed-aldol-condensation"}, "Gn2pdkvdbGQ": {"duration": 562, "path": "khan/math/pre-algebra/fractions-pre-alg/decimals-fractions-pre-alg/converting-fractions-to-decimals/", "keywords": "fraction, decimal, math, khan, academy, CC_4_NF_6", "id": "Gn2pdkvdbGQ", "title": "Converting fractions to decimals", "description": "How to express a fraction as a decimal", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Gn2pdkvdbGQ.mp4/Gn2pdkvdbGQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Gn2pdkvdbGQ.mp4/Gn2pdkvdbGQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Gn2pdkvdbGQ.m3u8/Gn2pdkvdbGQ.m3u8"}, "slug": "converting-fractions-to-decimals", "video_id": "Gn2pdkvdbGQ", "youtube_id": "Gn2pdkvdbGQ", "readable_id": "converting-fractions-to-decimals"}, "ulxyWZf7BWc": {"duration": 508, "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/what-is-diabetes-mellitus/", "keywords": "", "id": "ulxyWZf7BWc", "title": "What is diabetes mellitus?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ulxyWZf7BWc.mp4/ulxyWZf7BWc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ulxyWZf7BWc.mp4/ulxyWZf7BWc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ulxyWZf7BWc.m3u8/ulxyWZf7BWc.m3u8"}, "slug": "what-is-diabetes-mellitus", "video_id": "ulxyWZf7BWc", "youtube_id": "ulxyWZf7BWc", "readable_id": "what-is-diabetes-mellitus"}, "lZSi0xifXwc": {"duration": 382, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/rn-ventricular-septal-defect/", "keywords": "", "id": "lZSi0xifXwc", "title": "Ventricular septal defect", "description": "An ventricular septal defect is a hole between the two ventricles of the heart. Normally this hole is present at birth but closes within a few days of life. Failure of this hole to close is called a ventricular septal defect, and usually is asymptomatic (no obvious symptoms are present).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lZSi0xifXwc.mp4/lZSi0xifXwc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lZSi0xifXwc.mp4/lZSi0xifXwc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lZSi0xifXwc.m3u8/lZSi0xifXwc.m3u8"}, "slug": "rn-ventricular-septal-defect", "video_id": "lZSi0xifXwc", "youtube_id": "lZSi0xifXwc", "readable_id": "rn-ventricular-septal-defect"}, "pQu1RMIkg3c": {"duration": 303, "path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/paul-gauguin-nevermore-1897/", "keywords": "gauguin, Post-Impressionism, art, art history, smarthistory, Courtauld, London", "id": "pQu1RMIkg3c", "title": "Gauguin, Nevermore", "description": "Paul Gauguin, Nevermore, 1897, oil on canvas (Courtauld Gallery, London) Speakers: Dr. Beth Harris, Rachel Ropeik, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pQu1RMIkg3c.mp4/pQu1RMIkg3c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pQu1RMIkg3c.mp4/pQu1RMIkg3c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pQu1RMIkg3c.m3u8/pQu1RMIkg3c.m3u8"}, "slug": "paul-gauguin-nevermore-1897", "video_id": "pQu1RMIkg3c", "youtube_id": "pQu1RMIkg3c", "readable_id": "paul-gauguin-nevermore-1897"}, "-oW4M3vpuRM": {"duration": 680, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/corp-bankruptcy-tutorial/chapter-7-bankruptcy-liquidation/", "keywords": "bankruptcy, chapter, liquidation", "id": "-oW4M3vpuRM", "title": "Chapter 7: Bankruptcy liquidation", "description": "Introduction to bankruptcy liquidation (Chapter 7)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-oW4M3vpuRM.mp4/-oW4M3vpuRM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-oW4M3vpuRM.mp4/-oW4M3vpuRM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-oW4M3vpuRM.m3u8/-oW4M3vpuRM.m3u8"}, "slug": "chapter-7-bankruptcy-liquidation", "video_id": "-oW4M3vpuRM", "youtube_id": "-oW4M3vpuRM", "readable_id": "chapter-7-bankruptcy-liquidation"}, "EVSkf7l7EuI": {"duration": 494, "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/keynesian-thinking/risks-of-keynesian-thinking/", "keywords": "macroeconomics, keynes", "id": "EVSkf7l7EuI", "title": "Risks of Keynesian thinking", "description": "Why Keynesian thinking might not be ideal sometimes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EVSkf7l7EuI.mp4/EVSkf7l7EuI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EVSkf7l7EuI.mp4/EVSkf7l7EuI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EVSkf7l7EuI.m3u8/EVSkf7l7EuI.m3u8"}, "slug": "risks-of-keynesian-thinking", "video_id": "EVSkf7l7EuI", "youtube_id": "EVSkf7l7EuI", "readable_id": "risks-of-keynesian-thinking"}, "P3zyEtO6viY": {"duration": 162, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/core-alg-negative-exponents/more-negative-exponent-intuition/", "keywords": "", "id": "P3zyEtO6viY", "title": "More negative exponent intuition", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P3zyEtO6viY.mp4/P3zyEtO6viY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P3zyEtO6viY.mp4/P3zyEtO6viY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P3zyEtO6viY.m3u8/P3zyEtO6viY.m3u8"}, "slug": "more-negative-exponent-intuition", "video_id": "P3zyEtO6viY", "youtube_id": "P3zyEtO6viY", "readable_id": "more-negative-exponent-intuition"}, "AEKztz8ubSM": {"duration": 298, "path": "khan/math/algebra-basics/core-algebra-linear-equations-inequalities/ratios-core-algebra/constructing-proportions-to-solve-application-problems/", "keywords": "", "id": "AEKztz8ubSM", "title": "Constructing equations from proportions to solve problems", "description": "We're putting some nifty thinking to work as we use proportions to create equations which then tell us how much tip to leave for dinner.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AEKztz8ubSM.mp4/AEKztz8ubSM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AEKztz8ubSM.mp4/AEKztz8ubSM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AEKztz8ubSM.m3u8/AEKztz8ubSM.m3u8"}, "slug": "constructing-proportions-to-solve-application-problems", "video_id": "AEKztz8ubSM", "youtube_id": "AEKztz8ubSM", "readable_id": "constructing-proportions-to-solve-application-problems"}, "PRl8TLUleZg": {"duration": 819, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm/what-is-aortic-dissection/", "keywords": "", "id": "PRl8TLUleZg", "title": "What is an aortic dissection?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PRl8TLUleZg.mp4/PRl8TLUleZg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PRl8TLUleZg.mp4/PRl8TLUleZg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PRl8TLUleZg.m3u8/PRl8TLUleZg.m3u8"}, "slug": "what-is-aortic-dissection", "video_id": "PRl8TLUleZg", "youtube_id": "PRl8TLUleZg", "readable_id": "what-is-aortic-dissection"}, "AMTMtWHclKo": {"duration": 505, "path": "khan/partner-content/wi-phi/metaphys-epistemology/mind-body-dualism/", "keywords": "", "id": "AMTMtWHclKo", "title": "Mind: Mind-Body Dualism", "description": "Are we just physical things? Or perhaps just mental things? Maybe both? In this video, Alex Byrne (MIT) explains a modern argument due to Saul Kripke for mind-body dualism.\n\nSpeaker: Dr. Alex Byrne, Professor of Philosophy, MIT", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AMTMtWHclKo.mp4/AMTMtWHclKo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AMTMtWHclKo.mp4/AMTMtWHclKo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AMTMtWHclKo.m3u8/AMTMtWHclKo.m3u8"}, "slug": "mind-body-dualism", "video_id": "AMTMtWHclKo", "youtube_id": "AMTMtWHclKo", "readable_id": "mind-body-dualism"}, "n-S63_goDFg": {"duration": 1297, "path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-determinant-and-area-of-a-parallelogram/", "keywords": "linear, algebra, determinant", "id": "n-S63_goDFg", "title": "Determinant and area of a parallelogram", "description": "Realizing that the determinant of a 2x2 matrix is equal to the area of the parallelogram defined by the column vectors of the matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n-S63_goDFg.mp4/n-S63_goDFg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n-S63_goDFg.mp4/n-S63_goDFg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n-S63_goDFg.m3u8/n-S63_goDFg.m3u8"}, "slug": "linear-algebra-determinant-and-area-of-a-parallelogram", "video_id": "n-S63_goDFg", "youtube_id": "n-S63_goDFg", "readable_id": "linear-algebra-determinant-and-area-of-a-parallelogram"}, "C_LiAEjuIIc": {"duration": 422, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/thermoregulation-in-the-circulatory-system/", "keywords": "", "id": "C_LiAEjuIIc", "title": "Thermoregulation in the circulatory system", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C_LiAEjuIIc.mp4/C_LiAEjuIIc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C_LiAEjuIIc.mp4/C_LiAEjuIIc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C_LiAEjuIIc.m3u8/C_LiAEjuIIc.m3u8"}, "slug": "thermoregulation-in-the-circulatory-system", "video_id": "C_LiAEjuIIc", "youtube_id": "C_LiAEjuIIc", "readable_id": "thermoregulation-in-the-circulatory-system"}, "3nQejB-XPoY": {"duration": 747, "path": "khan/math/differential-calculus/taking-derivatives/der_common_functions/proofs-of-derivatives-of-ln-x-and-e-x/", "keywords": "calculus, derivative, implicit, differentiation, ln", "id": "3nQejB-XPoY", "title": "Proofs of derivatives of ln(x) and e^x", "description": "Doing both proofs in the same video to clarify any misconceptions that the original proof was \"circular\".", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3nQejB-XPoY.mp4/3nQejB-XPoY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3nQejB-XPoY.mp4/3nQejB-XPoY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3nQejB-XPoY.m3u8/3nQejB-XPoY.m3u8"}, "slug": "proofs-of-derivatives-of-ln-x-and-e-x", "video_id": "3nQejB-XPoY", "youtube_id": "3nQejB-XPoY", "readable_id": "proofs-of-derivatives-of-ln-x-and-e-x"}, "cY-iPEtvJAE": {"duration": 537, "path": "khan/test-prep/gmat/problem-solving/gmat-math-53/", "keywords": "GMAT, Math, problem, solving", "id": "cY-iPEtvJAE", "title": "GMAT: Math 53", "description": "245-247, pg. 186", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cY-iPEtvJAE.mp4/cY-iPEtvJAE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cY-iPEtvJAE.mp4/cY-iPEtvJAE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cY-iPEtvJAE.m3u8/cY-iPEtvJAE.m3u8"}, "slug": "gmat-math-53", "video_id": "cY-iPEtvJAE", "youtube_id": "cY-iPEtvJAE", "readable_id": "gmat-math-53"}, "fYUpLvM5X7A": {"duration": 503, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/neurotransmitter-anatomy/", "keywords": "MCAT", "id": "fYUpLvM5X7A", "title": "Neurotransmitter anatomy", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fYUpLvM5X7A.mp4/fYUpLvM5X7A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fYUpLvM5X7A.mp4/fYUpLvM5X7A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fYUpLvM5X7A.m3u8/fYUpLvM5X7A.m3u8"}, "slug": "neurotransmitter-anatomy", "video_id": "fYUpLvM5X7A", "youtube_id": "fYUpLvM5X7A", "readable_id": "neurotransmitter-anatomy"}, "ZACf9EecFrY": {"duration": 408, "path": "khan/math/geometry/basic-geometry/volume_tutorial/nets-of-polyhedra/", "keywords": "", "id": "ZACf9EecFrY", "title": "Nets of polyhedra", "description": "Admittedly, \"nets of polyhedra\" sounds like the title of a bad sci-fi movie about man-eating, muti-headed fish. But in reality, nets of polyhedra are just 2D objects that wrap around 3D objects, like wrapping paper around presents.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZACf9EecFrY.mp4/ZACf9EecFrY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZACf9EecFrY.mp4/ZACf9EecFrY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZACf9EecFrY.m3u8/ZACf9EecFrY.m3u8"}, "slug": "nets-of-polyhedra", "video_id": "ZACf9EecFrY", "youtube_id": "ZACf9EecFrY", "readable_id": "nets-of-polyhedra"}, "WNhxkpmVQYw": {"duration": 679, "path": "khan/math/recreational-math/puzzles/brain-teasers/light-bulb-switching-brain-teaser/", "keywords": "brain, teaser, factor, math, number, theory", "id": "WNhxkpmVQYw", "title": "Light bulb switching brain teaser", "description": "Turning light bulbs on and off.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WNhxkpmVQYw.mp4/WNhxkpmVQYw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WNhxkpmVQYw.mp4/WNhxkpmVQYw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WNhxkpmVQYw.m3u8/WNhxkpmVQYw.m3u8"}, "slug": "light-bulb-switching-brain-teaser", "video_id": "WNhxkpmVQYw", "youtube_id": "WNhxkpmVQYw", "readable_id": "light-bulb-switching-brain-teaser"}, "0na0xtIHkXA": {"duration": 898, "path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-5-electron-clouds/", "keywords": "", "id": "0na0xtIHkXA", "title": "VSEPR for 5 electron clouds", "description": "VSEPR for molecules with five electron clouds including examples for trigonal bipyramidal and seesaw-shaped molecules.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0na0xtIHkXA.mp4/0na0xtIHkXA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0na0xtIHkXA.mp4/0na0xtIHkXA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0na0xtIHkXA.m3u8/0na0xtIHkXA.m3u8"}, "slug": "vsepr-for-5-electron-clouds", "video_id": "0na0xtIHkXA", "youtube_id": "0na0xtIHkXA", "readable_id": "vsepr-for-5-electron-clouds"}, "bB1K4H0vx0g": {"duration": 537, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/saloua-raouda-choucair/", "keywords": "Tate", "id": "bB1K4H0vx0g", "title": "Saloua Raouda Choucair: From Beirut to Tate Modern", "description": "This video brought to you by\u00a0Tate.org.uk\n\nLebanese artist Saloua Raouda Choucair is famous in the Middle East for bringing abstraction to the region. A rare female voice in the Beirut art scene from the 1940s onwards, she has spent her career combining Western abstraction with the traditions of Islamic design. But working through civil war and ongoing unrest in Lebanon, she remains virtually unknown outside her own country. At the age of 97, this pioneer of art was belatedly recognised with her first major museum show. Here we travel to Beirut to meet the artist's daughter at the apartment where Choucair's work started its journey.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bB1K4H0vx0g.mp4/bB1K4H0vx0g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bB1K4H0vx0g.mp4/bB1K4H0vx0g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bB1K4H0vx0g.m3u8/bB1K4H0vx0g.m3u8"}, "slug": "saloua-raouda-choucair", "video_id": "bB1K4H0vx0g", "youtube_id": "bB1K4H0vx0g", "readable_id": "saloua-raouda-choucair"}, "Zr72qWNMk7E": {"duration": 325, "path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-on-two-functions-example-1/", "keywords": "", "id": "Zr72qWNMk7E", "title": "Chain rule example using visual function definitions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zr72qWNMk7E.mp4/Zr72qWNMk7E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zr72qWNMk7E.mp4/Zr72qWNMk7E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zr72qWNMk7E.m3u8/Zr72qWNMk7E.m3u8"}, "slug": "chain-rule-on-two-functions-example-1", "video_id": "Zr72qWNMk7E", "youtube_id": "Zr72qWNMk7E", "readable_id": "chain-rule-on-two-functions-example-1"}, "y0sk8LG4mWQ": {"duration": 237, "path": "khan/science/health-and-medicine/hematologic-system/bleeding-and-impaired-hemostasis/secondary-hemostasis/", "keywords": "", "id": "y0sk8LG4mWQ", "title": "Secondary hemostasis", "description": "Secondary hemostasis is the process where the platelet plug initially created in primary hemostasis is reinforced by the conversion of fibrinogen to fibrin.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y0sk8LG4mWQ.mp4/y0sk8LG4mWQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y0sk8LG4mWQ.mp4/y0sk8LG4mWQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y0sk8LG4mWQ.m3u8/y0sk8LG4mWQ.m3u8"}, "slug": "secondary-hemostasis", "video_id": "y0sk8LG4mWQ", "youtube_id": "y0sk8LG4mWQ", "readable_id": "secondary-hemostasis"}, "PK4mJ2F9lvA": {"duration": 211, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/maximum-distance-on-two-spheres/", "keywords": "", "id": "PK4mJ2F9lvA", "title": "7 Maximum distance on two spheres", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PK4mJ2F9lvA.mp4/PK4mJ2F9lvA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PK4mJ2F9lvA.mp4/PK4mJ2F9lvA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PK4mJ2F9lvA.m3u8/PK4mJ2F9lvA.m3u8"}, "slug": "maximum-distance-on-two-spheres", "video_id": "PK4mJ2F9lvA", "youtube_id": "PK4mJ2F9lvA", "readable_id": "maximum-distance-on-two-spheres"}, "ou9YMWlJgkE": {"duration": 434, "path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/newton-s-second-law-of-motion/", "keywords": "physics, newton, 2nd, second, law", "id": "ou9YMWlJgkE", "title": "Newton's second law of motion", "description": "Newton's Second Law of Motion: F=ma", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ou9YMWlJgkE.mp4/ou9YMWlJgkE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ou9YMWlJgkE.mp4/ou9YMWlJgkE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ou9YMWlJgkE.m3u8/ou9YMWlJgkE.m3u8"}, "slug": "newton-s-second-law-of-motion", "video_id": "ou9YMWlJgkE", "youtube_id": "ou9YMWlJgkE", "readable_id": "newton-s-second-law-of-motion"}, "UBlem4dGLGU": {"duration": 635, "path": "khan/test-prep/mcat/organ-systems/hematologic-system/the-life-and-times-of-rbcs-and-platelets/", "keywords": "", "id": "UBlem4dGLGU", "title": "Life and times of RBCs and platelets", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UBlem4dGLGU.mp4/UBlem4dGLGU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UBlem4dGLGU.mp4/UBlem4dGLGU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UBlem4dGLGU.m3u8/UBlem4dGLGU.m3u8"}, "slug": "the-life-and-times-of-rbcs-and-platelets", "video_id": "UBlem4dGLGU", "youtube_id": "UBlem4dGLGU", "readable_id": "the-life-and-times-of-rbcs-and-platelets"}, "-fCVxTTAtFQ": {"duration": 491, "path": "khan/partner-content/lebron-asks-subject/lebron-asks/monte-carlo-simulation-to-answer-lebron-s-question/", "keywords": "marquee", "id": "-fCVxTTAtFQ", "title": "Monte Carlo simulation to answer LeBron's question", "description": "When down 3 with 30 seconds left, is it better to take a hard 3 or an easy 2 and try to get another possession? Simulation at: http://www.khanacademy.org/cs/basketball-decisions/1024155511", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-fCVxTTAtFQ.mp4/-fCVxTTAtFQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-fCVxTTAtFQ.mp4/-fCVxTTAtFQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-fCVxTTAtFQ.m3u8/-fCVxTTAtFQ.m3u8"}, "slug": "monte-carlo-simulation-to-answer-lebron-s-question", "video_id": "-fCVxTTAtFQ", "youtube_id": "-fCVxTTAtFQ", "readable_id": "monte-carlo-simulation-to-answer-lebron-s-question"}, "Ty6TfxCYPQI": {"duration": 494, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-anemia/rn-anemia/", "keywords": "", "id": "Ty6TfxCYPQI", "title": "What is anemia?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ty6TfxCYPQI.mp4/Ty6TfxCYPQI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ty6TfxCYPQI.mp4/Ty6TfxCYPQI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ty6TfxCYPQI.m3u8/Ty6TfxCYPQI.m3u8"}, "slug": "rn-anemia", "video_id": "Ty6TfxCYPQI", "youtube_id": "Ty6TfxCYPQI", "readable_id": "rn-anemia"}, "iimpwYBiKNg": {"duration": 122, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/linear-equation-word-problems-tu/application-problems-with-equation-in-one-variable/", "keywords": "u10_l1_t3_we2, Application, problems, with, equation, in, one, variable, CC_3_MD_8, CC_4_MD_3, CC_6_EE_2_c, CC_6_EE_6, CC_7_EE_4, CC_7_EE_4_a, CC_8_EE_7_a", "id": "iimpwYBiKNg", "title": "Word problem: solving equations", "description": "Here's a nifty word problem in which we find the dimensions of a garden given only the perimeter. Let's create an equation to solve!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iimpwYBiKNg.mp4/iimpwYBiKNg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iimpwYBiKNg.mp4/iimpwYBiKNg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iimpwYBiKNg.m3u8/iimpwYBiKNg.m3u8"}, "slug": "application-problems-with-equation-in-one-variable", "video_id": "iimpwYBiKNg", "youtube_id": "iimpwYBiKNg", "readable_id": "application-problems-with-equation-in-one-variable"}, "pzQnc_0eZA8": {"duration": 429, "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/is-lm-model-tutorial/government-spending-and-the-is-lm-model/", "keywords": "IS/LM, IS, LM, model", "id": "pzQnc_0eZA8", "title": "Government spending and the IS-LM model", "description": "How a change in fiscal policy shifts the IS curve", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pzQnc_0eZA8.mp4/pzQnc_0eZA8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pzQnc_0eZA8.mp4/pzQnc_0eZA8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pzQnc_0eZA8.m3u8/pzQnc_0eZA8.m3u8"}, "slug": "government-spending-and-the-is-lm-model", "video_id": "pzQnc_0eZA8", "youtube_id": "pzQnc_0eZA8", "readable_id": "government-spending-and-the-is-lm-model"}, "pLba3OzsfDU": {"duration": 262, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/symptoms-of-right-sided-heart-failure/", "keywords": "", "id": "pLba3OzsfDU", "title": "Symptoms of right sided heart failure", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pLba3OzsfDU.mp4/pLba3OzsfDU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pLba3OzsfDU.mp4/pLba3OzsfDU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pLba3OzsfDU.m3u8/pLba3OzsfDU.m3u8"}, "slug": "symptoms-of-right-sided-heart-failure", "video_id": "pLba3OzsfDU", "youtube_id": "pLba3OzsfDU", "readable_id": "symptoms-of-right-sided-heart-failure"}, "28N_IRo9g4Y": {"duration": 755, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e1-elimination-mechanism/", "keywords": "", "id": "28N_IRo9g4Y", "title": "E1 elimination: Mechanism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/28N_IRo9g4Y.mp4/28N_IRo9g4Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/28N_IRo9g4Y.mp4/28N_IRo9g4Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/28N_IRo9g4Y.m3u8/28N_IRo9g4Y.m3u8"}, "slug": "e1-elimination-mechanism", "video_id": "28N_IRo9g4Y", "youtube_id": "28N_IRo9g4Y", "readable_id": "e1-elimination-mechanism"}, "qjhlt6G-Azo": {"duration": 665, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-bronchiolitis/bronchiolitis-treatment/", "keywords": "", "id": "qjhlt6G-Azo", "title": "Bronchiolitis treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qjhlt6G-Azo.mp4/qjhlt6G-Azo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qjhlt6G-Azo.mp4/qjhlt6G-Azo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qjhlt6G-Azo.m3u8/qjhlt6G-Azo.m3u8"}, "slug": "bronchiolitis-treatment", "video_id": "qjhlt6G-Azo", "youtube_id": "qjhlt6G-Azo", "readable_id": "bronchiolitis-treatment"}, "Ro5tCQtfrZU": {"duration": 176, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/toby-rush-eyeverify/toby-rush-1/", "keywords": "", "id": "Ro5tCQtfrZU", "title": "University scientist meets entrepreneur", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ro5tCQtfrZU.mp4/Ro5tCQtfrZU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ro5tCQtfrZU.mp4/Ro5tCQtfrZU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ro5tCQtfrZU.m3u8/Ro5tCQtfrZU.m3u8"}, "slug": "toby-rush-1", "video_id": "Ro5tCQtfrZU", "youtube_id": "Ro5tCQtfrZU", "readable_id": "toby-rush-1"}, "IgYUR7aFY-c": {"duration": 397, "path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/unbalanced-forces-and-motion/", "keywords": "newton's, laws, physics, forces, balance", "id": "IgYUR7aFY-c", "title": "Unbalanced forces and motion", "description": "Thinking about what is true about how unbalanced forces relate to motion and acceleration", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IgYUR7aFY-c.mp4/IgYUR7aFY-c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IgYUR7aFY-c.mp4/IgYUR7aFY-c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IgYUR7aFY-c.m3u8/IgYUR7aFY-c.m3u8"}, "slug": "unbalanced-forces-and-motion", "video_id": "IgYUR7aFY-c", "youtube_id": "IgYUR7aFY-c", "readable_id": "unbalanced-forces-and-motion"}, "9xwAPXM0Flg": {"duration": 279, "path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-13-14/", "keywords": "CAHSEE, practice, california, high, school, exit, examination", "id": "9xwAPXM0Flg", "title": "CAHSEE practice: Problems 13-14", "description": "CAHSEE Practice: Problems 13-14", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9xwAPXM0Flg.mp4/9xwAPXM0Flg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9xwAPXM0Flg.mp4/9xwAPXM0Flg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9xwAPXM0Flg.m3u8/9xwAPXM0Flg.m3u8"}, "slug": "cahsee-practice-problems-13-14", "video_id": "9xwAPXM0Flg", "youtube_id": "9xwAPXM0Flg", "readable_id": "cahsee-practice-problems-13-14"}, "Nk2q-_jkJVs": {"duration": 603, "path": "khan/science/physics/oscillatory-motion/harmonic-motion/introduction-to-harmonic-motion/", "keywords": "harmonic, motion, spring, period, oscillatory", "id": "Nk2q-_jkJVs", "title": "Introduction to harmonic motion", "description": "Intuition behind the motion of a mass on a spring (some calculus near the end).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Nk2q-_jkJVs.mp4/Nk2q-_jkJVs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Nk2q-_jkJVs.mp4/Nk2q-_jkJVs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Nk2q-_jkJVs.m3u8/Nk2q-_jkJVs.m3u8"}, "slug": "introduction-to-harmonic-motion", "video_id": "Nk2q-_jkJVs", "youtube_id": "Nk2q-_jkJVs", "readable_id": "introduction-to-harmonic-motion"}, "ghE1UnbIP4M": {"duration": 193, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/beth-schmidt-wishbone/beth-schmidt-1/", "keywords": "", "id": "ghE1UnbIP4M", "title": "Students wishes come true", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ghE1UnbIP4M.mp4/ghE1UnbIP4M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ghE1UnbIP4M.mp4/ghE1UnbIP4M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ghE1UnbIP4M.m3u8/ghE1UnbIP4M.m3u8"}, "slug": "beth-schmidt-1", "video_id": "ghE1UnbIP4M", "youtube_id": "ghE1UnbIP4M", "readable_id": "beth-schmidt-1"}, "Mx7KM-k2MMo": {"duration": 767, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/nucleophilicity-basicity-sal/nucleophilicity-vs-basicity/", "keywords": "organic, chemistry, Nucleophilicity, vs., Basicity, nucleophile, base", "id": "Mx7KM-k2MMo", "title": "Nucleophilicity vs. basicity", "description": "Nucleophilicity vs. Basicity . The difference between what it means to be a nucleophile and a base", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mx7KM-k2MMo.mp4/Mx7KM-k2MMo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mx7KM-k2MMo.mp4/Mx7KM-k2MMo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mx7KM-k2MMo.m3u8/Mx7KM-k2MMo.m3u8"}, "slug": "nucleophilicity-vs-basicity", "video_id": "Mx7KM-k2MMo", "youtube_id": "Mx7KM-k2MMo", "readable_id": "nucleophilicity-vs-basicity"}, "_b-2rZpX5z4": {"duration": 177, "path": "khan/math/algebra2/manipulating-functions/composing-functions/new-function-from-composition/", "keywords": "", "id": "_b-2rZpX5z4", "title": "How to find the formula of a composite function given the formulas of the composed functions (example)", "description": "Sal solves the following problem: Given that f(x)=\u221a(x^2-1) and g(x)=x/(1+x), find f(g(x)) and g(f(x)).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_b-2rZpX5z4.mp4/_b-2rZpX5z4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_b-2rZpX5z4.mp4/_b-2rZpX5z4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_b-2rZpX5z4.m3u8/_b-2rZpX5z4.m3u8"}, "slug": "new-function-from-composition", "video_id": "_b-2rZpX5z4", "youtube_id": "_b-2rZpX5z4", "readable_id": "new-function-from-composition"}, "icNOBmKjDLo": {"duration": 571, "path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/weak-acid-equilibrium/", "keywords": "", "id": "icNOBmKjDLo", "title": "Weak acid equilibrium", "description": "Quick overview of Ka and pKa. Example of calculating the pH of a weak acid solution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/icNOBmKjDLo.mp4/icNOBmKjDLo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/icNOBmKjDLo.mp4/icNOBmKjDLo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/icNOBmKjDLo.m3u8/icNOBmKjDLo.m3u8"}, "slug": "weak-acid-equilibrium", "video_id": "icNOBmKjDLo", "youtube_id": "icNOBmKjDLo", "readable_id": "weak-acid-equilibrium"}, "oxSzkIftog8": {"duration": 97, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/translation-example/", "keywords": "", "id": "oxSzkIftog8", "title": "How to perform a translation (example)", "description": "Sal shows how to perform a translation on a triangle using our interactive widget!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oxSzkIftog8.mp4/oxSzkIftog8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oxSzkIftog8.mp4/oxSzkIftog8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oxSzkIftog8.m3u8/oxSzkIftog8.m3u8"}, "slug": "translation-example", "video_id": "oxSzkIftog8", "youtube_id": "oxSzkIftog8", "readable_id": "translation-example"}, "ZKKDTfHcsG0": {"duration": 249, "path": "khan/math/pre-algebra/factors-multiples/prime_factorization/prime-factorization/", "keywords": "U02_L1_T3_we3, Prime, Factorization, CC_4_OA_4", "id": "ZKKDTfHcsG0", "title": "Prime factorization", "description": "Prime Factorization", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZKKDTfHcsG0.mp4/ZKKDTfHcsG0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZKKDTfHcsG0.mp4/ZKKDTfHcsG0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZKKDTfHcsG0.m3u8/ZKKDTfHcsG0.m3u8"}, "slug": "prime-factorization", "video_id": "ZKKDTfHcsG0", "youtube_id": "ZKKDTfHcsG0", "readable_id": "prime-factorization"}, "uX2w0b8Qlss": {"duration": 241, "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/depreciation-amortization-tut/depreciation-in-cash-flow/", "keywords": "Depreciation, in, Cash, Flow", "id": "uX2w0b8Qlss", "title": "Depreciation in cash flow", "description": "Depreciation in Cash Flow", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uX2w0b8Qlss.mp4/uX2w0b8Qlss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uX2w0b8Qlss.mp4/uX2w0b8Qlss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uX2w0b8Qlss.m3u8/uX2w0b8Qlss.m3u8"}, "slug": "depreciation-in-cash-flow", "video_id": "uX2w0b8Qlss", "youtube_id": "uX2w0b8Qlss", "readable_id": "depreciation-in-cash-flow"}, "Hod_JfGJPj4": {"duration": 372, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-plasma-cell-dyscrasias/what-is-waldenstrom-macroglobulinemia/", "keywords": "", "id": "Hod_JfGJPj4", "title": "What is waldenstrom macroglobulinemia?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hod_JfGJPj4.mp4/Hod_JfGJPj4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hod_JfGJPj4.mp4/Hod_JfGJPj4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hod_JfGJPj4.m3u8/Hod_JfGJPj4.m3u8"}, "slug": "what-is-waldenstrom-macroglobulinemia", "video_id": "Hod_JfGJPj4", "youtube_id": "Hod_JfGJPj4", "readable_id": "what-is-waldenstrom-macroglobulinemia"}, "1reblXFlM6I": {"duration": 299, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/change-of-base-formula-proof/", "keywords": "", "id": "1reblXFlM6I", "title": "Change of base formula proof", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1reblXFlM6I.mp4/1reblXFlM6I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1reblXFlM6I.mp4/1reblXFlM6I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1reblXFlM6I.m3u8/1reblXFlM6I.m3u8"}, "slug": "change-of-base-formula-proof", "video_id": "1reblXFlM6I", "youtube_id": "1reblXFlM6I", "readable_id": "change-of-base-formula-proof"}, "_qB9JCpr8Co": {"duration": 389, "path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-38-42/", "keywords": "CAHSEE, practice, california, high, school, exit, examination", "id": "_qB9JCpr8Co", "title": "CAHSEE practice: Problems 38-42", "description": "CAHSEE Practice: Problems 38-42", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_qB9JCpr8Co.mp4/_qB9JCpr8Co.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_qB9JCpr8Co.mp4/_qB9JCpr8Co.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_qB9JCpr8Co.m3u8/_qB9JCpr8Co.m3u8"}, "slug": "cahsee-practice-problems-38-42", "video_id": "_qB9JCpr8Co", "youtube_id": "_qB9JCpr8Co", "readable_id": "cahsee-practice-problems-38-42"}, "sSWQ1Sx7vw8": {"duration": 452, "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies/sscc-blended-navteach/", "keywords": "", "id": "sSWQ1Sx7vw8", "title": "Case study #3: Teaching in Lab Rotation model at Navigator Schools", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sSWQ1Sx7vw8.mp4/sSWQ1Sx7vw8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sSWQ1Sx7vw8.mp4/sSWQ1Sx7vw8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sSWQ1Sx7vw8.m3u8/sSWQ1Sx7vw8.m3u8"}, "slug": "sscc-blended-navteach", "video_id": "sSWQ1Sx7vw8", "youtube_id": "sSWQ1Sx7vw8", "readable_id": "sscc-blended-navteach"}, "rzkgZWxT4UM": {"duration": 400, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/quantiative-electrolysis-edited/", "keywords": "", "id": "rzkgZWxT4UM", "title": "Quantiative electrolysis", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rzkgZWxT4UM.mp4/rzkgZWxT4UM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rzkgZWxT4UM.mp4/rzkgZWxT4UM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rzkgZWxT4UM.m3u8/rzkgZWxT4UM.m3u8"}, "slug": "quantiative-electrolysis-edited", "video_id": "rzkgZWxT4UM", "youtube_id": "rzkgZWxT4UM", "readable_id": "quantiative-electrolysis-edited"}, "8Y-snjheI9M": {"duration": 381, "path": "khan/math/integral-calculus/solid_revolution_topic/arc-length/arc-length-formula/", "keywords": "", "id": "8Y-snjheI9M", "title": "Non rigorous justification for arc length formula", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8Y-snjheI9M.mp4/8Y-snjheI9M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8Y-snjheI9M.mp4/8Y-snjheI9M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8Y-snjheI9M.m3u8/8Y-snjheI9M.m3u8"}, "slug": "arc-length-formula", "video_id": "8Y-snjheI9M", "youtube_id": "8Y-snjheI9M", "readable_id": "arc-length-formula"}, "yUpDRpkUhf4": {"duration": 592, "path": "khan/math/differential-calculus/taking-derivatives/der_common_functions/proof-d-dx-ln-x-1-x/", "keywords": "proof, derivative, ln, natural, log, calculus", "id": "yUpDRpkUhf4", "title": "Proof: d/dx(ln x) = 1/x", "description": "Taking the derivative of ln x", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yUpDRpkUhf4.mp4/yUpDRpkUhf4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yUpDRpkUhf4.mp4/yUpDRpkUhf4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yUpDRpkUhf4.m3u8/yUpDRpkUhf4.m3u8"}, "slug": "proof-d-dx-ln-x-1-x", "video_id": "yUpDRpkUhf4", "youtube_id": "yUpDRpkUhf4", "readable_id": "proof-d-dx-ln-x-1-x"}, "vPkkCOlGND4": {"duration": 360, "path": "khan/science/physics/linear-momentum/momentum-tutorial/momentum-ice-skater-throws-a-ball/", "keywords": "physics, physical, science, momentum, velocity", "id": "vPkkCOlGND4", "title": "Momentum: Ice skater throws a ball", "description": "A simple conservation of momentum problem involving an ice skater and a ball", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vPkkCOlGND4.mp4/vPkkCOlGND4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vPkkCOlGND4.mp4/vPkkCOlGND4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vPkkCOlGND4.m3u8/vPkkCOlGND4.m3u8"}, "slug": "momentum-ice-skater-throws-a-ball", "video_id": "vPkkCOlGND4", "youtube_id": "vPkkCOlGND4", "readable_id": "momentum-ice-skater-throws-a-ball"}, "FWEqB0J6mgA": {"duration": 165, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-sub-ones-tens/understanding-place-value-while-subtracting-ones/", "keywords": "", "id": "FWEqB0J6mgA", "title": "Understanding place value when subtracting ones", "description": "Learn how to subtract 4 from 46 by thinking about place value.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FWEqB0J6mgA.mp4/FWEqB0J6mgA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FWEqB0J6mgA.mp4/FWEqB0J6mgA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FWEqB0J6mgA.m3u8/FWEqB0J6mgA.m3u8"}, "slug": "understanding-place-value-while-subtracting-ones", "video_id": "FWEqB0J6mgA", "youtube_id": "FWEqB0J6mgA", "readable_id": "understanding-place-value-while-subtracting-ones"}, "fZtUn_THXnk": {"duration": 152, "path": "khan/math/arithmetic/multiplication-division/mult-div-word-problems/multiplication-word-problem-example-1/", "keywords": "", "id": "fZtUn_THXnk", "title": "Multiplication word problem example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fZtUn_THXnk.mp4/fZtUn_THXnk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fZtUn_THXnk.mp4/fZtUn_THXnk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fZtUn_THXnk.m3u8/fZtUn_THXnk.m3u8"}, "slug": "multiplication-word-problem-example-1", "video_id": "fZtUn_THXnk", "youtube_id": "fZtUn_THXnk", "readable_id": "multiplication-word-problem-example-1"}, "VnfpSf6YxuU": {"duration": 226, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-bits/", "keywords": "Hack bots, hacked robot, hacking everyday products, robot, Bit-zee", "id": "VnfpSf6YxuU", "title": "Parts", "description": "In this video we take a quick a look at some of the parts we used to make Bit-zee. Although we highly recommend you create your own Bit-zee using parts from products that people would otherwise throw away.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VnfpSf6YxuU.mp4/VnfpSf6YxuU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VnfpSf6YxuU.mp4/VnfpSf6YxuU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VnfpSf6YxuU.m3u8/VnfpSf6YxuU.m3u8"}, "slug": "bit-zee-s-bits", "video_id": "VnfpSf6YxuU", "youtube_id": "VnfpSf6YxuU", "readable_id": "bit-zee-s-bits"}, "xOxvyeSl0uA": {"duration": 482, "path": "khan/math/algebra/linear_inequalities/inequalities/multi-step-inequalities/", "keywords": "Compound, Inequalities", "id": "xOxvyeSl0uA", "title": "Multi-step inequalities", "description": "Compound Inequalities.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xOxvyeSl0uA.mp4/xOxvyeSl0uA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xOxvyeSl0uA.mp4/xOxvyeSl0uA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xOxvyeSl0uA.m3u8/xOxvyeSl0uA.m3u8"}, "slug": "multi-step-inequalities", "video_id": "xOxvyeSl0uA", "youtube_id": "xOxvyeSl0uA", "readable_id": "multi-step-inequalities"}, "Zj-a_9cd5jc": {"duration": 152, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/more-equation-practice/patterns-in-sequences-1/", "keywords": "U03_L1_T1_we1, Patterns, in, Sequences, CC_5_OA_3, CC_39336_F-BF_2", "id": "Zj-a_9cd5jc", "title": "Patterns in sequences 1", "description": "Patterns in Sequences 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zj-a_9cd5jc.mp4/Zj-a_9cd5jc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zj-a_9cd5jc.mp4/Zj-a_9cd5jc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zj-a_9cd5jc.m3u8/Zj-a_9cd5jc.m3u8"}, "slug": "patterns-in-sequences-1", "video_id": "Zj-a_9cd5jc", "youtube_id": "Zj-a_9cd5jc", "readable_id": "patterns-in-sequences-1"}, "7rrSuhFC7I0": {"duration": 516, "path": "khan/economics-finance-domain/core-finance/housing/home-equity-tutorial/home-equity-loans/", "keywords": "accounting, finance, credit, crisis, mortgage", "id": "7rrSuhFC7I0", "title": "Home equity loans", "description": "Simple example of borrowing from equity to fuel consumption", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7rrSuhFC7I0.mp4/7rrSuhFC7I0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7rrSuhFC7I0.mp4/7rrSuhFC7I0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7rrSuhFC7I0.m3u8/7rrSuhFC7I0.m3u8"}, "slug": "home-equity-loans", "video_id": "7rrSuhFC7I0", "youtube_id": "7rrSuhFC7I0", "readable_id": "home-equity-loans"}, "tzQ7arA917E": {"duration": 478, "path": "khan/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity/trigonometry-unit-circle-symmetry/", "keywords": "", "id": "tzQ7arA917E", "title": "Symmetry of trig values", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tzQ7arA917E.mp4/tzQ7arA917E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tzQ7arA917E.mp4/tzQ7arA917E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tzQ7arA917E.m3u8/tzQ7arA917E.m3u8"}, "slug": "trigonometry-unit-circle-symmetry", "video_id": "tzQ7arA917E", "youtube_id": "tzQ7arA917E", "readable_id": "trigonometry-unit-circle-symmetry"}, "hH9AETxy6QI": {"duration": 356, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/treatment-of-leukemia/", "keywords": "", "id": "hH9AETxy6QI", "title": "Leukemia treatment", "description": "There are three main solutions to treat leukemia. Chemotherapy is a collection of drugs which target cells that rapidly multiply (a key characteristic in cancer). Radiation is often used on patients who are at a high risk of the leukemia entering the brain. For resistant leukemias, bone marrow transplantation is considered.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hH9AETxy6QI.mp4/hH9AETxy6QI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hH9AETxy6QI.mp4/hH9AETxy6QI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hH9AETxy6QI.m3u8/hH9AETxy6QI.m3u8"}, "slug": "treatment-of-leukemia", "video_id": "hH9AETxy6QI", "youtube_id": "hH9AETxy6QI", "readable_id": "treatment-of-leukemia"}, "rLI88bU7Fuo": {"duration": 594, "path": "khan/test-prep/gmat/problem-solving/gmat-math-46/", "keywords": "gmat, math, problem, solving", "id": "rLI88bU7Fuo", "title": "GMAT: Math 46", "description": "217-220, pg. 182", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rLI88bU7Fuo.mp4/rLI88bU7Fuo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rLI88bU7Fuo.mp4/rLI88bU7Fuo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rLI88bU7Fuo.m3u8/rLI88bU7Fuo.m3u8"}, "slug": "gmat-math-46", "video_id": "rLI88bU7Fuo", "youtube_id": "rLI88bU7Fuo", "readable_id": "gmat-math-46"}, "OUrwdqwzqMU": {"duration": 100, "path": "khan/humanities/global-culture/conceptual-performance/moma-abramovic-body-as-a-medium/", "keywords": "", "id": "OUrwdqwzqMU", "title": "Marina Abramovi\u0107: The Body as medium", "description": "Marina Abramovi\u0107 talks about how she shifted from painting to performance art. To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OUrwdqwzqMU.mp4/OUrwdqwzqMU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OUrwdqwzqMU.mp4/OUrwdqwzqMU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OUrwdqwzqMU.m3u8/OUrwdqwzqMU.m3u8"}, "slug": "moma-abramovic-body-as-a-medium", "video_id": "OUrwdqwzqMU", "youtube_id": "OUrwdqwzqMU", "readable_id": "moma-abramovic-body-as-a-medium"}, "zh8XASZxo1Q": {"duration": 719, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/circular-econ-gdp-tutorial/parsing-gross-domestic-product/", "keywords": "macroeconomics, GNP, GDP", "id": "zh8XASZxo1Q", "title": "Parsing gross domestic product", "description": "Understanding what GDP does and doesn't measure.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zh8XASZxo1Q.mp4/zh8XASZxo1Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zh8XASZxo1Q.mp4/zh8XASZxo1Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zh8XASZxo1Q.m3u8/zh8XASZxo1Q.m3u8"}, "slug": "parsing-gross-domestic-product", "video_id": "zh8XASZxo1Q", "youtube_id": "zh8XASZxo1Q", "readable_id": "parsing-gross-domestic-product"}, "qk69pR91R00": {"duration": 155, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/checking-ordered-pair-solutions-to-equations-1/", "keywords": "", "id": "qk69pR91R00", "title": "Checking ordered pair solutions to equations example 1", "description": "Checking ordered pair solutions to equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qk69pR91R00.mp4/qk69pR91R00.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qk69pR91R00.mp4/qk69pR91R00.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qk69pR91R00.m3u8/qk69pR91R00.m3u8"}, "slug": "checking-ordered-pair-solutions-to-equations-1", "video_id": "qk69pR91R00", "youtube_id": "qk69pR91R00", "readable_id": "checking-ordered-pair-solutions-to-equations-1"}, "Llt-KkHugRQ": {"duration": 562, "path": "khan/math/pre-algebra/fractions-pre-alg/decimals-fractions-pre-alg/ordering-numeric-expressions_dup_3/", "keywords": "number, order, percentage, decimal, fraction", "id": "Llt-KkHugRQ", "title": "Ordering numeric expressions", "description": "Ordering numbers expressed as decimals, fractions, and percentages", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Llt-KkHugRQ.mp4/Llt-KkHugRQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Llt-KkHugRQ.mp4/Llt-KkHugRQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Llt-KkHugRQ.m3u8/Llt-KkHugRQ.m3u8"}, "slug": "ordering-numeric-expressions_dup_3", "video_id": "Llt-KkHugRQ", "youtube_id": "Llt-KkHugRQ", "readable_id": "ordering-numeric-expressions_dup_3"}, "TOdHMORp4is": {"duration": 510, "path": "khan/test-prep/mcat/physical-processes/redox-reactions/oxidizing-and-reducing-agents-1/", "keywords": "", "id": "TOdHMORp4is", "title": "Oxidizing and reducing agents", "description": "How to identify the oxidizing and reducing agents.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TOdHMORp4is.mp4/TOdHMORp4is.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TOdHMORp4is.mp4/TOdHMORp4is.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TOdHMORp4is.m3u8/TOdHMORp4is.m3u8"}, "slug": "oxidizing-and-reducing-agents-1", "video_id": "TOdHMORp4is", "youtube_id": "TOdHMORp4is", "readable_id": "oxidizing-and-reducing-agents-1"}, "czfJKPN-HEo": {"duration": 542, "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/mpc-tutorial/mathy-version-of-mpc-and-multiplier-optional/", "keywords": "macroeconomics, keynes", "id": "czfJKPN-HEo", "title": "Mathy version of MPC and multiplier (optional)", "description": "Generalizing what we did in the last video with more math", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/czfJKPN-HEo.mp4/czfJKPN-HEo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/czfJKPN-HEo.mp4/czfJKPN-HEo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/czfJKPN-HEo.m3u8/czfJKPN-HEo.m3u8"}, "slug": "mathy-version-of-mpc-and-multiplier-optional", "video_id": "czfJKPN-HEo", "youtube_id": "czfJKPN-HEo", "readable_id": "mathy-version-of-mpc-and-multiplier-optional"}, "u6zDpUL5RkU": {"duration": 641, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/absolute-value-equations/absolute-value-equations/", "keywords": "Absolute, Value, Equations", "id": "u6zDpUL5RkU", "title": "Absolute value equations", "description": "Absolute Value Equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u6zDpUL5RkU.mp4/u6zDpUL5RkU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u6zDpUL5RkU.mp4/u6zDpUL5RkU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u6zDpUL5RkU.m3u8/u6zDpUL5RkU.m3u8"}, "slug": "absolute-value-equations", "video_id": "u6zDpUL5RkU", "youtube_id": "u6zDpUL5RkU", "readable_id": "absolute-value-equations"}, "4VqHGULLA4o": {"duration": 187, "path": "khan/computing/computer-programming/programming-games-visualizations/intro-games-visualizations/welcome-games-visualizations/", "keywords": "", "id": "4VqHGULLA4o", "title": "Intro to Games and Visualizations", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4VqHGULLA4o.mp4/4VqHGULLA4o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4VqHGULLA4o.mp4/4VqHGULLA4o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4VqHGULLA4o.m3u8/4VqHGULLA4o.m3u8"}, "slug": "welcome-games-visualizations", "video_id": "4VqHGULLA4o", "youtube_id": "4VqHGULLA4o", "readable_id": "welcome-games-visualizations"}, "Z1zdkcwosD4": {"duration": 541, "path": "khan/math/precalculus/prob_comb/combinatorics_precalc/factorial-and-counting-seat-arrangements/", "keywords": "", "id": "Z1zdkcwosD4", "title": "Factorial and counting seat arrangements", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z1zdkcwosD4.mp4/Z1zdkcwosD4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z1zdkcwosD4.mp4/Z1zdkcwosD4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z1zdkcwosD4.m3u8/Z1zdkcwosD4.m3u8"}, "slug": "factorial-and-counting-seat-arrangements", "video_id": "Z1zdkcwosD4", "youtube_id": "Z1zdkcwosD4", "readable_id": "factorial-and-counting-seat-arrangements"}, "KxM05gLQ654": {"duration": 196, "path": "khan/partner-content/pixar/animate/ball/a2-quick/", "keywords": "", "id": "KxM05gLQ654", "title": "2. Linear interpolation", "description": "Connecting key poses with straight lines is called linear interpolation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KxM05gLQ654.mp4/KxM05gLQ654.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KxM05gLQ654.mp4/KxM05gLQ654.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KxM05gLQ654.m3u8/KxM05gLQ654.m3u8"}, "slug": "a2-quick", "video_id": "KxM05gLQ654", "youtube_id": "KxM05gLQ654", "readable_id": "a2-quick"}, "2GD1Oz0sPzY": {"duration": 245, "path": "khan/humanities/becoming-modern/avant-garde-france/realism/douard-manet-the-railway-1872-73/", "keywords": "Manet, Railway, Paris, Second Empire, \u00c9douard Manet, Khan Academy, Smarthistory, Impressionism, Art History", "id": "2GD1Oz0sPzY", "title": "Manet, The Railway", "description": "\u00c9douard Manet, The Railway,1872-73, oil on canvas (National Gallery of Art)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2GD1Oz0sPzY.mp4/2GD1Oz0sPzY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2GD1Oz0sPzY.mp4/2GD1Oz0sPzY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2GD1Oz0sPzY.m3u8/2GD1Oz0sPzY.m3u8"}, "slug": "douard-manet-the-railway-1872-73", "video_id": "2GD1Oz0sPzY", "youtube_id": "2GD1Oz0sPzY", "readable_id": "douard-manet-the-railway-1872-73"}, "F8OPQ_28mdo": {"duration": 297, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/bayeux-tapestry/", "keywords": "", "id": "F8OPQ_28mdo", "title": "The Bayeux Tapestry - Seven Ages of Britain - BBC One", "description": "The Bayeux Tapestry. The BBC's David Dimbleby describes the historical significance of the Bayeux Tapestry for his forthcoming BBC One Series, Seven Ages of Britain.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F8OPQ_28mdo.mp4/F8OPQ_28mdo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F8OPQ_28mdo.mp4/F8OPQ_28mdo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F8OPQ_28mdo.m3u8/F8OPQ_28mdo.m3u8"}, "slug": "bayeux-tapestry", "video_id": "F8OPQ_28mdo", "youtube_id": "F8OPQ_28mdo", "readable_id": "bayeux-tapestry"}, "bqcVNzObJec": {"duration": 78, "path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-1/", "keywords": "", "id": "bqcVNzObJec", "title": "Tools and parts to build a Spout", "description": "Make Spout a low cost beetle bot that can avoid obstacles. Spout is low cost and can be made without solder.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bqcVNzObJec.mp4/bqcVNzObJec.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bqcVNzObJec.mp4/bqcVNzObJec.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bqcVNzObJec.m3u8/bqcVNzObJec.m3u8"}, "slug": "solderless-spout-1", "video_id": "bqcVNzObJec", "youtube_id": "bqcVNzObJec", "readable_id": "solderless-spout-1"}, "IYFkXWlgC_w": {"duration": 461, "path": "khan/math/differential-equations/first-order-differential-equations/modeling-with-differential-equations/modeling-population-with-simple-differential-equation/", "keywords": "", "id": "IYFkXWlgC_w", "title": "Modeling population with simple differential equation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IYFkXWlgC_w.mp4/IYFkXWlgC_w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IYFkXWlgC_w.mp4/IYFkXWlgC_w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IYFkXWlgC_w.m3u8/IYFkXWlgC_w.m3u8"}, "slug": "modeling-population-with-simple-differential-equation", "video_id": "IYFkXWlgC_w", "youtube_id": "IYFkXWlgC_w", "readable_id": "modeling-population-with-simple-differential-equation"}, "qVPtT8CX1eM": {"duration": 646, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-32/", "keywords": "gmat, data, sufficiency, math", "id": "qVPtT8CX1eM", "title": "GMAT: Data sufficiency 32", "description": "129-131, pg. 289", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qVPtT8CX1eM.mp4/qVPtT8CX1eM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qVPtT8CX1eM.mp4/qVPtT8CX1eM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qVPtT8CX1eM.m3u8/qVPtT8CX1eM.m3u8"}, "slug": "gmat-data-sufficiency-32", "video_id": "qVPtT8CX1eM", "youtube_id": "qVPtT8CX1eM", "readable_id": "gmat-data-sufficiency-32"}, "8GhjZn2W8ns": {"duration": 205, "path": "khan/science/discoveries-projects/robots/bit-zee/attach-bit-zee-s-digital-camera/", "keywords": "connect a digital camera, hack, make, maker, connections", "id": "8GhjZn2W8ns", "title": "Digital camera connections II", "description": "In this video we show you how to attach Bit-zee's camera and route the wires", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8GhjZn2W8ns.mp4/8GhjZn2W8ns.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8GhjZn2W8ns.mp4/8GhjZn2W8ns.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8GhjZn2W8ns.m3u8/8GhjZn2W8ns.m3u8"}, "slug": "attach-bit-zee-s-digital-camera", "video_id": "8GhjZn2W8ns", "youtube_id": "8GhjZn2W8ns", "readable_id": "attach-bit-zee-s-digital-camera"}, "3s-n4eFypPc": {"duration": 439, "path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/types-of-cerebral-palsy-part-2-dyskinetic-and-ataxic/", "keywords": "Cerebral Palsy (Disease Or Medical Condition),Brain (Anatomical Structure),Ataxia (Symptom),Health (Industry)", "id": "3s-n4eFypPc", "title": "Types of cerebral palsy part 2 - Dyskinetic and ataxic", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3s-n4eFypPc.mp4/3s-n4eFypPc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3s-n4eFypPc.mp4/3s-n4eFypPc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3s-n4eFypPc.m3u8/3s-n4eFypPc.m3u8"}, "slug": "types-of-cerebral-palsy-part-2-dyskinetic-and-ataxic", "video_id": "3s-n4eFypPc", "youtube_id": "3s-n4eFypPc", "readable_id": "types-of-cerebral-palsy-part-2-dyskinetic-and-ataxic"}, "-FtlH4svqx4": {"duration": 686, "path": "khan/math/probability/statistics-inferential/hypothesis-testing/hypothesis-testing-and-p-values/", "keywords": "Hypothesis, Testing, and, P-values", "id": "-FtlH4svqx4", "title": "Hypothesis testing and p-values", "description": "Hypothesis Testing and P-values", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-FtlH4svqx4.mp4/-FtlH4svqx4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-FtlH4svqx4.mp4/-FtlH4svqx4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-FtlH4svqx4.m3u8/-FtlH4svqx4.m3u8"}, "slug": "hypothesis-testing-and-p-values", "video_id": "-FtlH4svqx4", "youtube_id": "-FtlH4svqx4", "readable_id": "hypothesis-testing-and-p-values"}, "RTAHBQ6fuHA": {"duration": 333, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s2-harder/", "keywords": "", "id": "RTAHBQ6fuHA", "title": "Right triangle word problems \u2014 Harder example", "description": "Watch Sal work through a harder Right triangle word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RTAHBQ6fuHA.mp4/RTAHBQ6fuHA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RTAHBQ6fuHA.mp4/RTAHBQ6fuHA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RTAHBQ6fuHA.m3u8/RTAHBQ6fuHA.m3u8"}, "slug": "sat-math-s2-harder", "video_id": "RTAHBQ6fuHA", "youtube_id": "RTAHBQ6fuHA", "readable_id": "sat-math-s2-harder"}, "PCOevYD9cb4": {"duration": 310, "path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/diagnosing-bipolar-disorder/", "keywords": "Diagnosis (Literature Subject),Bipolar Disorder (Disease Or Medical Condition),Health (Industry)", "id": "PCOevYD9cb4", "title": "Diagnosing bipolar disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PCOevYD9cb4.mp4/PCOevYD9cb4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PCOevYD9cb4.mp4/PCOevYD9cb4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PCOevYD9cb4.m3u8/PCOevYD9cb4.m3u8"}, "slug": "diagnosing-bipolar-disorder", "video_id": "PCOevYD9cb4", "youtube_id": "PCOevYD9cb4", "readable_id": "diagnosing-bipolar-disorder"}, "RouNXdkC0do": {"duration": 614, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/earnings-and-eps/", "keywords": "earnings, finance, income, statement, eps, balance, sheet", "id": "RouNXdkC0do", "title": "Earnings and EPS", "description": "Earnings, EPS (earnings per share) and how they relate to the income statement and balance sheet", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RouNXdkC0do.mp4/RouNXdkC0do.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RouNXdkC0do.mp4/RouNXdkC0do.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RouNXdkC0do.m3u8/RouNXdkC0do.m3u8"}, "slug": "earnings-and-eps", "video_id": "RouNXdkC0do", "youtube_id": "RouNXdkC0do", "readable_id": "earnings-and-eps"}, "3cVSSiuiwsQ": {"duration": 520, "path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/halogenation-of-benzene-1/", "keywords": "", "id": "3cVSSiuiwsQ", "title": "Halogenation", "description": "The halogenation of benzene", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3cVSSiuiwsQ.mp4/3cVSSiuiwsQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3cVSSiuiwsQ.mp4/3cVSSiuiwsQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3cVSSiuiwsQ.m3u8/3cVSSiuiwsQ.m3u8"}, "slug": "halogenation-of-benzene-1", "video_id": "3cVSSiuiwsQ", "youtube_id": "3cVSSiuiwsQ", "readable_id": "halogenation-of-benzene-1"}, "lOIP_Z_-0Hs": {"duration": 374, "path": "khan/math/recreational-math/vi-hart/spirals-fibonacci/doodling-in-math-class-spirals-fibonacci-and-being-a-plant-2-of-3/", "keywords": "doodling, mathematics, spirals, flowers, plants, phyllotaxis, fibonacci, golden ratio, phi", "id": "lOIP_Z_-0Hs", "title": "Doodling in math: Spirals, Fibonacci, and being a plant [2 of 3]", "description": "Part 1: http://youtu.be/ahXIMUkSXX0Part 3: http://youtu.be/14-NdQwKz9wMore on Angle-a-trons: http://www.youtube.com/watch?v=o6W6P8JZW0oNote: Beautiful spirally non-Fibonacci pinecones are very rare! If you find one, keep it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lOIP_Z_-0Hs.mp4/lOIP_Z_-0Hs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lOIP_Z_-0Hs.mp4/lOIP_Z_-0Hs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lOIP_Z_-0Hs.m3u8/lOIP_Z_-0Hs.m3u8"}, "slug": "doodling-in-math-class-spirals-fibonacci-and-being-a-plant-2-of-3", "video_id": "lOIP_Z_-0Hs", "youtube_id": "lOIP_Z_-0Hs", "readable_id": "doodling-in-math-class-spirals-fibonacci-and-being-a-plant-2-of-3"}, "wXhkMvUXskE": {"duration": 144, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-9-5/", "keywords": "", "id": "wXhkMvUXskE", "title": "5 Angle in triangle", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wXhkMvUXskE.mp4/wXhkMvUXskE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wXhkMvUXskE.mp4/wXhkMvUXskE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wXhkMvUXskE.m3u8/wXhkMvUXskE.m3u8"}, "slug": "sat-2010-may-9-5", "video_id": "wXhkMvUXskE", "youtube_id": "wXhkMvUXskE", "readable_id": "sat-2010-may-9-5"}, "TErJ-Yr67BI": {"duration": 546, "path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/proof-diagonals-of-a-parallelogram-bisect-each-other/", "keywords": "geometry", "id": "TErJ-Yr67BI", "title": "Proof: The diagonals of a parallelogram bisect each other (and conversely)", "description": "Sal proves that a quadrilateral is a parallelogram if and only if its diagonals bisect each other.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TErJ-Yr67BI.mp4/TErJ-Yr67BI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TErJ-Yr67BI.mp4/TErJ-Yr67BI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TErJ-Yr67BI.m3u8/TErJ-Yr67BI.m3u8"}, "slug": "proof-diagonals-of-a-parallelogram-bisect-each-other", "video_id": "TErJ-Yr67BI", "youtube_id": "TErJ-Yr67BI", "readable_id": "proof-diagonals-of-a-parallelogram-bisect-each-other"}, "_HXl3mu1IoM": {"duration": 645, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/pulseless-electrical-activity-asystole/", "keywords": "", "id": "_HXl3mu1IoM", "title": "Pulseless electrical activity (PEA) and asystole", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_HXl3mu1IoM.mp4/_HXl3mu1IoM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_HXl3mu1IoM.mp4/_HXl3mu1IoM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_HXl3mu1IoM.m3u8/_HXl3mu1IoM.m3u8"}, "slug": "pulseless-electrical-activity-asystole", "video_id": "_HXl3mu1IoM", "youtube_id": "_HXl3mu1IoM", "readable_id": "pulseless-electrical-activity-asystole"}, "uqyLOuAzbvo": {"duration": 608, "path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-8/", "keywords": "Bernoulli's, Equation, proof, pressure, volume, fluid, physics, motion", "id": "uqyLOuAzbvo", "title": "Bernoulli's equation (part 1)", "description": "This is the first of two videos where Sal derives Bernoulli's equation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uqyLOuAzbvo.mp4/uqyLOuAzbvo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uqyLOuAzbvo.mp4/uqyLOuAzbvo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uqyLOuAzbvo.m3u8/uqyLOuAzbvo.m3u8"}, "slug": "fluids-part-8", "video_id": "uqyLOuAzbvo", "youtube_id": "uqyLOuAzbvo", "readable_id": "fluids-part-8"}, "-sA-vI2a2mM": {"duration": 266, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-numbers-pre-alg/converting-mixed-numbers-to-improper-fractions/", "keywords": "u2_l1_t2_we2, Converting, Mixed, Numbers, to, Improper, Fractions", "id": "-sA-vI2a2mM", "title": "Converting mixed numbers to improper fractions", "description": "Converting Mixed Numbers to Improper Fractions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-sA-vI2a2mM.mp4/-sA-vI2a2mM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-sA-vI2a2mM.mp4/-sA-vI2a2mM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-sA-vI2a2mM.m3u8/-sA-vI2a2mM.m3u8"}, "slug": "converting-mixed-numbers-to-improper-fractions", "video_id": "-sA-vI2a2mM", "youtube_id": "-sA-vI2a2mM", "readable_id": "converting-mixed-numbers-to-improper-fractions"}, "n30yILpUitw": {"duration": 367, "path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/redox-reaction-with-iron/", "keywords": "", "id": "n30yILpUitw", "title": "Redox reaction with iron", "description": "For the reaction between Fe and HCl, identifying the half reactions and what is getting oxidized and reduced.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n30yILpUitw.mp4/n30yILpUitw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n30yILpUitw.mp4/n30yILpUitw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n30yILpUitw.m3u8/n30yILpUitw.m3u8"}, "slug": "redox-reaction-with-iron", "video_id": "n30yILpUitw", "youtube_id": "n30yILpUitw", "readable_id": "redox-reaction-with-iron"}, "ss7Ap-6bFYw": {"duration": 469, "path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/acid-base-definitions-1/", "keywords": "", "id": "ss7Ap-6bFYw", "title": "Acid-base definitions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ss7Ap-6bFYw.mp4/ss7Ap-6bFYw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ss7Ap-6bFYw.mp4/ss7Ap-6bFYw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ss7Ap-6bFYw.m3u8/ss7Ap-6bFYw.m3u8"}, "slug": "acid-base-definitions-1", "video_id": "ss7Ap-6bFYw", "youtube_id": "ss7Ap-6bFYw", "readable_id": "acid-base-definitions-1"}, "N06Jy-gQog8": {"duration": 252, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/correction-calendar-notation/", "keywords": "calendar, dates", "id": "N06Jy-gQog8", "title": "Correction calendar notation", "description": "Correcting the time difference calculation by taking into account that there is no year 0", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N06Jy-gQog8.mp4/N06Jy-gQog8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N06Jy-gQog8.mp4/N06Jy-gQog8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N06Jy-gQog8.m3u8/N06Jy-gQog8.m3u8"}, "slug": "correction-calendar-notation", "video_id": "N06Jy-gQog8", "youtube_id": "N06Jy-gQog8", "readable_id": "correction-calendar-notation"}, "i9rfWOAEplk": {"duration": 778, "path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/ortho-para-directors-i/", "keywords": "", "id": "i9rfWOAEplk", "title": "Ortho-para directors I", "description": "Regiochemistry", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i9rfWOAEplk.mp4/i9rfWOAEplk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i9rfWOAEplk.mp4/i9rfWOAEplk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i9rfWOAEplk.m3u8/i9rfWOAEplk.m3u8"}, "slug": "ortho-para-directors-i", "video_id": "i9rfWOAEplk", "youtube_id": "i9rfWOAEplk", "readable_id": "ortho-para-directors-i"}, "Sc6zc8KR_NU": {"duration": 124, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-call-parity-clarification/", "keywords": "Put-Call, Parity, Clarification", "id": "Sc6zc8KR_NU", "title": "Put-call parity clarification", "description": "Put-Call Parity Clarification", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Sc6zc8KR_NU.mp4/Sc6zc8KR_NU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Sc6zc8KR_NU.mp4/Sc6zc8KR_NU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Sc6zc8KR_NU.m3u8/Sc6zc8KR_NU.m3u8"}, "slug": "put-call-parity-clarification", "video_id": "Sc6zc8KR_NU", "youtube_id": "Sc6zc8KR_NU", "readable_id": "put-call-parity-clarification"}, "6e0LyXQJoW4": {"duration": 241, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-7/", "keywords": "", "id": "6e0LyXQJoW4", "title": "7 Perimeter", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6e0LyXQJoW4.mp4/6e0LyXQJoW4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6e0LyXQJoW4.mp4/6e0LyXQJoW4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6e0LyXQJoW4.m3u8/6e0LyXQJoW4.m3u8"}, "slug": "sat-2009-may-3-7", "video_id": "6e0LyXQJoW4", "youtube_id": "6e0LyXQJoW4", "readable_id": "sat-2009-may-3-7"}, "3JG3qn7-Sac": {"duration": 603, "path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/polynomial-approximation-of-functions-part-2/", "keywords": "power, maclauren, taylor, series, derivative, infinite, sum", "id": "3JG3qn7-Sac", "title": "Polynomial approximation of functions (part 2)", "description": "Approximating a function with a polynomial by making the derivatives equal at f(0) (Maclauren Series)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3JG3qn7-Sac.mp4/3JG3qn7-Sac.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3JG3qn7-Sac.mp4/3JG3qn7-Sac.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3JG3qn7-Sac.m3u8/3JG3qn7-Sac.m3u8"}, "slug": "polynomial-approximation-of-functions-part-2", "video_id": "3JG3qn7-Sac", "youtube_id": "3JG3qn7-Sac", "readable_id": "polynomial-approximation-of-functions-part-2"}, "V7H1oUHXPkg": {"duration": 561, "path": "khan/math/algebra-basics/core-algebra-systems/core-algebra-systems-tutorial/solving-linear-systems-by-substitution/", "keywords": "Solving, Linear, Systems, by, Substitution, CC_8_EE_8_b, CC_39336_A-REI_6", "id": "V7H1oUHXPkg", "title": "Solving linear systems by substitution", "description": "Solving Linear Systems by Substitution", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/V7H1oUHXPkg.mp4/V7H1oUHXPkg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/V7H1oUHXPkg.mp4/V7H1oUHXPkg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/V7H1oUHXPkg.m3u8/V7H1oUHXPkg.m3u8"}, "slug": "solving-linear-systems-by-substitution", "video_id": "V7H1oUHXPkg", "youtube_id": "V7H1oUHXPkg", "readable_id": "solving-linear-systems-by-substitution"}, "puqe3_HkDZA": {"duration": 418, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/what-is-laryngitis/", "keywords": "", "id": "puqe3_HkDZA", "title": "What is laryngitis ?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/puqe3_HkDZA.mp4/puqe3_HkDZA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/puqe3_HkDZA.mp4/puqe3_HkDZA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/puqe3_HkDZA.m3u8/puqe3_HkDZA.m3u8"}, "slug": "what-is-laryngitis", "video_id": "puqe3_HkDZA", "youtube_id": "puqe3_HkDZA", "readable_id": "what-is-laryngitis"}, "SZF5K8epWko": {"duration": 382, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/caravaggio-s-calling-of-st-matthew-c-1599-1600/", "keywords": "Caravaggio, Rome, Smarthistory, Art History, San Luigi dei Francese, Conarelli Chapel, St. Matthew, Baroque", "id": "SZF5K8epWko", "title": "Caravaggio, Calling of Saint Matthew", "description": "Caravaggio's Calling of St. Matthew, oil on canvas, c. 1599-1600 (Contarelli Chapel, San Luigi dei Francesi, Rome)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SZF5K8epWko.mp4/SZF5K8epWko.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SZF5K8epWko.mp4/SZF5K8epWko.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SZF5K8epWko.m3u8/SZF5K8epWko.m3u8"}, "slug": "caravaggio-s-calling-of-st-matthew-c-1599-1600", "video_id": "SZF5K8epWko", "youtube_id": "SZF5K8epWko", "readable_id": "caravaggio-s-calling-of-st-matthew-c-1599-1600"}, "Ncg1HB5uVLc": {"duration": 653, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-exterior-angles/", "keywords": "geometry, exterior, angles, polygon", "id": "Ncg1HB5uVLc", "title": "CA Geometry: Exterior angles", "description": "41-45, polygons, exterior angles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ncg1HB5uVLc.mp4/Ncg1HB5uVLc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ncg1HB5uVLc.mp4/Ncg1HB5uVLc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ncg1HB5uVLc.m3u8/Ncg1HB5uVLc.m3u8"}, "slug": "ca-geometry-exterior-angles", "video_id": "Ncg1HB5uVLc", "youtube_id": "Ncg1HB5uVLc", "readable_id": "ca-geometry-exterior-angles"}, "vbGwcvXgDlg": {"duration": 527, "path": "khan/math/arithmetic/multiplication-division/area-models-multiplication/area-model-for-multiplication/", "keywords": "", "id": "vbGwcvXgDlg", "title": "Multiplying: using an area model", "description": "Using graph paper we'll map out an area model to help us with a multiplication problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vbGwcvXgDlg.mp4/vbGwcvXgDlg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vbGwcvXgDlg.mp4/vbGwcvXgDlg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vbGwcvXgDlg.m3u8/vbGwcvXgDlg.m3u8"}, "slug": "area-model-for-multiplication", "video_id": "vbGwcvXgDlg", "youtube_id": "vbGwcvXgDlg", "readable_id": "area-model-for-multiplication"}, "tbQ_7zvRoN4": {"duration": 654, "path": "khan/math/competition-math/aime/2003-aime/sum-of-factors-2/", "keywords": "factor, sum, number, theory", "id": "tbQ_7zvRoN4", "title": "Sum of factors 2", "description": "Seeing the \"formula\" in the last method", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tbQ_7zvRoN4.mp4/tbQ_7zvRoN4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tbQ_7zvRoN4.mp4/tbQ_7zvRoN4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tbQ_7zvRoN4.m3u8/tbQ_7zvRoN4.m3u8"}, "slug": "sum-of-factors-2", "video_id": "tbQ_7zvRoN4", "youtube_id": "tbQ_7zvRoN4", "readable_id": "sum-of-factors-2"}, "oUgDaEwMbiU": {"duration": 297, "path": "khan/math/differential-calculus/limits_topic/continuity-limits/defining-a-function-at-a-point-to-make-it-continuous/", "keywords": "", "id": "oUgDaEwMbiU", "title": "Defining a function at a point to make it continuous", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oUgDaEwMbiU.mp4/oUgDaEwMbiU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oUgDaEwMbiU.mp4/oUgDaEwMbiU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oUgDaEwMbiU.m3u8/oUgDaEwMbiU.m3u8"}, "slug": "defining-a-function-at-a-point-to-make-it-continuous", "video_id": "oUgDaEwMbiU", "youtube_id": "oUgDaEwMbiU", "readable_id": "defining-a-function-at-a-point-to-make-it-continuous"}, "q_Q9C1Ooofc": {"duration": 177, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/alkane-with-ethyl-groups/", "keywords": "", "id": "q_Q9C1Ooofc", "title": "Naming alkanes with ethyl groups", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q_Q9C1Ooofc.mp4/q_Q9C1Ooofc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q_Q9C1Ooofc.mp4/q_Q9C1Ooofc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q_Q9C1Ooofc.m3u8/q_Q9C1Ooofc.m3u8"}, "slug": "alkane-with-ethyl-groups", "video_id": "q_Q9C1Ooofc", "youtube_id": "q_Q9C1Ooofc", "readable_id": "alkane-with-ethyl-groups"}, "3zU90x0OZ0Y": {"duration": 141, "path": "khan/humanities/art-1010/art-between-wars/surrealism1/giacometti-palace-at-4am-1932/", "keywords": "Giacometti, Palace at 4am, Smarthistory, Art History, Surrealism, MoMA", "id": "3zU90x0OZ0Y", "title": "Giacometti, The Palace at 4am", "description": "Alberto Giacometti, Palace at 4am, wood, glass, wire and string, 1932 (MoMA)\n\nSpeakers: Dr. Steven Zucker, Dr. Beth Harris \n\nhttp://www.smarthistory.org/surrealism-giacometti.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3zU90x0OZ0Y.mp4/3zU90x0OZ0Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3zU90x0OZ0Y.mp4/3zU90x0OZ0Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3zU90x0OZ0Y.m3u8/3zU90x0OZ0Y.m3u8"}, "slug": "giacometti-palace-at-4am-1932", "video_id": "3zU90x0OZ0Y", "youtube_id": "3zU90x0OZ0Y", "readable_id": "giacometti-palace-at-4am-1932"}, "UyCwAFQt4v0": {"duration": 359, "path": "khan/math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order/2nd-order-linear-homogeneous-differential-equations-3/", "keywords": "2nd, Order, Linear, Homogeneous, Differential, Equations", "id": "UyCwAFQt4v0", "title": "2nd order linear homogeneous differential equations 3", "description": "Let's use some initial conditions to solve for the particular solution", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UyCwAFQt4v0.mp4/UyCwAFQt4v0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UyCwAFQt4v0.mp4/UyCwAFQt4v0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UyCwAFQt4v0.m3u8/UyCwAFQt4v0.m3u8"}, "slug": "2nd-order-linear-homogeneous-differential-equations-3", "video_id": "UyCwAFQt4v0", "youtube_id": "UyCwAFQt4v0", "readable_id": "2nd-order-linear-homogeneous-differential-equations-3"}, "zlI8mx8Hc8o": {"duration": 738, "path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/lin-alg-orthogonal-complement-of-the-orthogonal-complement/", "keywords": "subspace, orthogonal, complement", "id": "zlI8mx8Hc8o", "title": "Orthogonal complement of the orthogonal complement", "description": "Finding that the orthogonal complement of the orthogonal complement of V is V", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zlI8mx8Hc8o.mp4/zlI8mx8Hc8o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zlI8mx8Hc8o.mp4/zlI8mx8Hc8o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zlI8mx8Hc8o.m3u8/zlI8mx8Hc8o.m3u8"}, "slug": "lin-alg-orthogonal-complement-of-the-orthogonal-complement", "video_id": "zlI8mx8Hc8o", "youtube_id": "zlI8mx8Hc8o", "readable_id": "lin-alg-orthogonal-complement-of-the-orthogonal-complement"}, "JVwp1m3wzvY": {"duration": 454, "path": "khan/partner-content/exploratorium/sound-explo/vocal-visualizer/vocal-visualizer-tools-and-assembly/", "keywords": "", "id": "JVwp1m3wzvY", "title": "Build your own Vocal Visualizer: Materials, tools, and steps", "description": "In this video, you'll find the materials and tools you'll need to build your own Vocal Visualizer, as well as all the necessary steps.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JVwp1m3wzvY.mp4/JVwp1m3wzvY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JVwp1m3wzvY.mp4/JVwp1m3wzvY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JVwp1m3wzvY.m3u8/JVwp1m3wzvY.m3u8"}, "slug": "vocal-visualizer-tools-and-assembly", "video_id": "JVwp1m3wzvY", "youtube_id": "JVwp1m3wzvY", "readable_id": "vocal-visualizer-tools-and-assembly"}, "ZeATszO-6e0": {"duration": 800, "path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/gene-mapping/", "keywords": "", "id": "ZeATszO-6e0", "title": "Gene mapping", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZeATszO-6e0.mp4/ZeATszO-6e0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZeATszO-6e0.mp4/ZeATszO-6e0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZeATszO-6e0.m3u8/ZeATszO-6e0.m3u8"}, "slug": "gene-mapping", "video_id": "ZeATszO-6e0", "youtube_id": "ZeATszO-6e0", "readable_id": "gene-mapping"}, "qoHva5i85Qo": {"duration": 203, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/vel-zquez-vulcan-s-forge-c-1630/", "keywords": "Velasquez, VulcanForge, Smarthistory, Art History, Baroque", "id": "qoHva5i85Qo", "title": "Vel\u00e1zquez, Vulcan's Forge", "description": "Diego Vel\u00e1zquez, Vulcan's Forge, c. 1630, oil on canvas, 223 cm x 290 cm (Museo del Prado, Madrid) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qoHva5i85Qo.mp4/qoHva5i85Qo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qoHva5i85Qo.mp4/qoHva5i85Qo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qoHva5i85Qo.m3u8/qoHva5i85Qo.m3u8"}, "slug": "vel-zquez-vulcan-s-forge-c-1630", "video_id": "qoHva5i85Qo", "youtube_id": "qoHva5i85Qo", "readable_id": "vel-zquez-vulcan-s-forge-c-1630"}, "3XymgBX-R2c": {"duration": 653, "path": "khan/partner-content/big-history-project/early-humans/how-did-first-humans-live/bhp-how-did-first-humans-live/", "keywords": "", "id": "3XymgBX-R2c", "title": "How Did The First Humans Live?", "description": "The evidence left behind by early humans gives us a vivid picture of their lives.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3XymgBX-R2c.mp4/3XymgBX-R2c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3XymgBX-R2c.mp4/3XymgBX-R2c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3XymgBX-R2c.m3u8/3XymgBX-R2c.m3u8"}, "slug": "bhp-how-did-first-humans-live", "video_id": "3XymgBX-R2c", "youtube_id": "3XymgBX-R2c", "readable_id": "bhp-how-did-first-humans-live"}, "4eZpJo_60QQ": {"duration": 360, "path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/aromatic-stability-of-benzene/", "keywords": "", "id": "4eZpJo_60QQ", "title": "Aromatic stability of benzene", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4eZpJo_60QQ.mp4/4eZpJo_60QQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4eZpJo_60QQ.mp4/4eZpJo_60QQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4eZpJo_60QQ.m3u8/4eZpJo_60QQ.m3u8"}, "slug": "aromatic-stability-of-benzene", "video_id": "4eZpJo_60QQ", "youtube_id": "4eZpJo_60QQ", "readable_id": "aromatic-stability-of-benzene"}, "-bt-H5VQl5E": {"duration": 600, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/septic-shock-pathophysiology-and-symptoms/", "keywords": "", "id": "-bt-H5VQl5E", "title": "Septic shock - pathophysiology and symptoms", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-bt-H5VQl5E.mp4/-bt-H5VQl5E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-bt-H5VQl5E.mp4/-bt-H5VQl5E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-bt-H5VQl5E.m3u8/-bt-H5VQl5E.m3u8"}, "slug": "septic-shock-pathophysiology-and-symptoms", "video_id": "-bt-H5VQl5E", "youtube_id": "-bt-H5VQl5E", "readable_id": "septic-shock-pathophysiology-and-symptoms"}, "ynBuPEmcjp4": {"duration": 577, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/preparation-of-esters-via-fischer-esterification/", "keywords": "", "id": "ynBuPEmcjp4", "title": "Preparation of esters via Fischer esterification", "description": "How to draw the mechanism for a Fischer esterification", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ynBuPEmcjp4.mp4/ynBuPEmcjp4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ynBuPEmcjp4.mp4/ynBuPEmcjp4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ynBuPEmcjp4.m3u8/ynBuPEmcjp4.m3u8"}, "slug": "preparation-of-esters-via-fischer-esterification", "video_id": "ynBuPEmcjp4", "youtube_id": "ynBuPEmcjp4", "readable_id": "preparation-of-esters-via-fischer-esterification"}, "SYcsZ6J3xZ4": {"duration": 374, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/stages-of-hypertension/", "keywords": "Hypertension (Disease Or Medical Condition),Health (Industry)", "id": "SYcsZ6J3xZ4", "title": "Stages of hypertension", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SYcsZ6J3xZ4.mp4/SYcsZ6J3xZ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SYcsZ6J3xZ4.mp4/SYcsZ6J3xZ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SYcsZ6J3xZ4.m3u8/SYcsZ6J3xZ4.m3u8"}, "slug": "stages-of-hypertension", "video_id": "SYcsZ6J3xZ4", "youtube_id": "SYcsZ6J3xZ4", "readable_id": "stages-of-hypertension"}, "yUYDhmQsiXY": {"duration": 306, "path": "khan/math/pre-algebra/fractions-pre-alg/multiplying-fractions-pre-alg/multiplication-as-scaling/", "keywords": "", "id": "yUYDhmQsiXY", "title": "Seeing multiplication as scaling with fractions", "description": "Learn how to compare the following expressions by thinking about multiplication as scaling: 2/3 x 7/8, 8/7 x 2/3, and (5x2)/(3x5)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yUYDhmQsiXY.mp4/yUYDhmQsiXY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yUYDhmQsiXY.mp4/yUYDhmQsiXY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yUYDhmQsiXY.m3u8/yUYDhmQsiXY.m3u8"}, "slug": "multiplication-as-scaling", "video_id": "yUYDhmQsiXY", "youtube_id": "yUYDhmQsiXY", "readable_id": "multiplication-as-scaling"}, "Mm7ZmL9zfpQ": {"duration": 162, "path": "khan/partner-content/pixar/rendering/rendering-2/rendering-7/", "keywords": "", "id": "Mm7ZmL9zfpQ", "title": "3. Calculate intersection point", "description": "Now we are ready to calculate an intersection point using our ray CP (parametric form) and our line AB (slope-intercept form).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Mm7ZmL9zfpQ.mp4/Mm7ZmL9zfpQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Mm7ZmL9zfpQ.mp4/Mm7ZmL9zfpQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Mm7ZmL9zfpQ.m3u8/Mm7ZmL9zfpQ.m3u8"}, "slug": "rendering-7", "video_id": "Mm7ZmL9zfpQ", "youtube_id": "Mm7ZmL9zfpQ", "readable_id": "rendering-7"}, "QN231qRvkr0": {"duration": 3, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-are-warts/", "keywords": "", "id": "QN231qRvkr0", "title": "What are warts?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QN231qRvkr0.mp4/QN231qRvkr0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QN231qRvkr0.mp4/QN231qRvkr0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QN231qRvkr0.m3u8/QN231qRvkr0.m3u8"}, "slug": "what-are-warts", "video_id": "QN231qRvkr0", "youtube_id": "QN231qRvkr0", "readable_id": "what-are-warts"}, "8X7yEzgurP8": {"duration": 534, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/resistance-in-a-tube/", "keywords": "", "id": "8X7yEzgurP8", "title": "Resistance in a tube", "description": "Learn how the size of a tube (it's radius) is related to its resistance to something flowing through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8X7yEzgurP8.mp4/8X7yEzgurP8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8X7yEzgurP8.mp4/8X7yEzgurP8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8X7yEzgurP8.m3u8/8X7yEzgurP8.m3u8"}, "slug": "resistance-in-a-tube", "video_id": "8X7yEzgurP8", "youtube_id": "8X7yEzgurP8", "readable_id": "resistance-in-a-tube"}, "qUNGPqCPzMg": {"duration": 751, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/telescoping-series/", "keywords": "", "id": "qUNGPqCPzMg", "title": "Partial fraction decomposition to find sum of telescoping series", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qUNGPqCPzMg.mp4/qUNGPqCPzMg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qUNGPqCPzMg.mp4/qUNGPqCPzMg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qUNGPqCPzMg.m3u8/qUNGPqCPzMg.m3u8"}, "slug": "telescoping-series", "video_id": "qUNGPqCPzMg", "youtube_id": "qUNGPqCPzMg", "readable_id": "telescoping-series"}, "dCQbfaQZtaY": {"duration": 241, "path": "khan/math/pre-algebra/fractions-pre-alg/visualizing-equiv-fracs-pre-alg/equivalent-fraction-word-problem-example/", "keywords": "", "id": "dCQbfaQZtaY", "title": "Equivalent fraction word problem example", "description": "Your teachers will tell you that being able to apply (or put to use) concepts helps you to learn them better. Here's a word problem in which you have to apply your knowledge of equivalent fractions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dCQbfaQZtaY.mp4/dCQbfaQZtaY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dCQbfaQZtaY.mp4/dCQbfaQZtaY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dCQbfaQZtaY.m3u8/dCQbfaQZtaY.m3u8"}, "slug": "equivalent-fraction-word-problem-example", "video_id": "dCQbfaQZtaY", "youtube_id": "dCQbfaQZtaY", "readable_id": "equivalent-fraction-word-problem-example"}, "P3QV9ktuYlQ": {"duration": 578, "path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/spring-potential-energy-example-mistake-in-math/", "keywords": "potential, energy, spring, kinetic, hooke's, centripetal", "id": "P3QV9ktuYlQ", "title": "Spring potential energy example (mistake in math)", "description": "A spring, a frozen loop-d-loop and more! (See if you can find the mistake I made and get the right answer!)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P3QV9ktuYlQ.mp4/P3QV9ktuYlQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P3QV9ktuYlQ.mp4/P3QV9ktuYlQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P3QV9ktuYlQ.m3u8/P3QV9ktuYlQ.m3u8"}, "slug": "spring-potential-energy-example-mistake-in-math", "video_id": "P3QV9ktuYlQ", "youtube_id": "P3QV9ktuYlQ", "readable_id": "spring-potential-energy-example-mistake-in-math"}, "I-Ha9At0zIo": {"duration": 955, "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-facilities-furniture/sscc-blended-facilities/", "keywords": "", "id": "I-Ha9At0zIo", "title": "Making sure the facilities and furniture support your educational model", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I-Ha9At0zIo.mp4/I-Ha9At0zIo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I-Ha9At0zIo.mp4/I-Ha9At0zIo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I-Ha9At0zIo.m3u8/I-Ha9At0zIo.m3u8"}, "slug": "sscc-blended-facilities", "video_id": "I-Ha9At0zIo", "youtube_id": "I-Ha9At0zIo", "readable_id": "sscc-blended-facilities"}, "qbXKrR9BQmg": {"duration": 517, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/mantoux-test-aka-ppd-or-tst/", "keywords": "", "id": "qbXKrR9BQmg", "title": "Mantoux test (aka. PPD or TST)", "description": "Learn how the Mantoux test is done and how it works. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qbXKrR9BQmg.mp4/qbXKrR9BQmg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qbXKrR9BQmg.mp4/qbXKrR9BQmg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qbXKrR9BQmg.m3u8/qbXKrR9BQmg.m3u8"}, "slug": "mantoux-test-aka-ppd-or-tst", "video_id": "qbXKrR9BQmg", "youtube_id": "qbXKrR9BQmg", "readable_id": "mantoux-test-aka-ppd-or-tst"}, "DRlE85xYqzE": {"duration": 435, "path": "khan/humanities/art-americas/early-cultures/aztec-mexica/coatlicue/", "keywords": "Coatlicue, Mexica, Aztec, Mexico, Pre-Columbian, Mexico City, National Museum of Anthropology", "id": "DRlE85xYqzE", "title": "Coatlicue", "description": "Coatlicue, c. 1500, Mexica (Aztec), found on the SE edge of the Plaza mayor/Zocalo in Mexico City, basalt, \u00a0257 cm high (National Museum of Anthropology, Mexico City)\nA conversation with Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DRlE85xYqzE.mp4/DRlE85xYqzE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DRlE85xYqzE.mp4/DRlE85xYqzE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DRlE85xYqzE.m3u8/DRlE85xYqzE.m3u8"}, "slug": "coatlicue", "video_id": "DRlE85xYqzE", "youtube_id": "DRlE85xYqzE", "readable_id": "coatlicue"}, "NIdqkwocNuE": {"duration": 569, "path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-5/", "keywords": "solid, volume, revolution, rotation, shell, disk, calculus", "id": "NIdqkwocNuE", "title": "Shell method to rotate around y-axis", "description": "Use the \"shell method\" to rotate about the y-axis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NIdqkwocNuE.mp4/NIdqkwocNuE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NIdqkwocNuE.mp4/NIdqkwocNuE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NIdqkwocNuE.m3u8/NIdqkwocNuE.m3u8"}, "slug": "solid-of-revolution-part-5", "video_id": "NIdqkwocNuE", "youtube_id": "NIdqkwocNuE", "readable_id": "solid-of-revolution-part-5"}, "-uZt8MLeDrg": {"duration": 654, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-33/", "keywords": "gmat, data, sufficiency, math", "id": "-uZt8MLeDrg", "title": "GMAT: Data sufficiency 33", "description": "132-134, pg. 289", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-uZt8MLeDrg.mp4/-uZt8MLeDrg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-uZt8MLeDrg.mp4/-uZt8MLeDrg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-uZt8MLeDrg.m3u8/-uZt8MLeDrg.m3u8"}, "slug": "gmat-data-sufficiency-33", "video_id": "-uZt8MLeDrg", "youtube_id": "-uZt8MLeDrg", "readable_id": "gmat-data-sufficiency-33"}, "mv5zucjq60k": {"duration": 699, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/risk-and-reward-introduction/", "keywords": "risk, reward, introduction", "id": "mv5zucjq60k", "title": "Risk and reward introduction", "description": "Basic introduction to risk and reward", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mv5zucjq60k.mp4/mv5zucjq60k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mv5zucjq60k.mp4/mv5zucjq60k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mv5zucjq60k.m3u8/mv5zucjq60k.m3u8"}, "slug": "risk-and-reward-introduction", "video_id": "mv5zucjq60k", "youtube_id": "mv5zucjq60k", "readable_id": "risk-and-reward-introduction"}, "pa92UdJCaos": {"duration": 1049, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/enterprise-value/", "keywords": "enterprise, value, EV, ebitda, operating, income, valuation", "id": "pa92UdJCaos", "title": "Enterprise value", "description": "Solving the P/E conundrum by looking at a different valuation metric (enterprise value)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pa92UdJCaos.mp4/pa92UdJCaos.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pa92UdJCaos.mp4/pa92UdJCaos.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pa92UdJCaos.m3u8/pa92UdJCaos.m3u8"}, "slug": "enterprise-value", "video_id": "pa92UdJCaos", "youtube_id": "pa92UdJCaos", "readable_id": "enterprise-value"}, "vA-55wZtLeE": {"duration": 764, "path": "khan/math/algebra-basics/core-algebra-systems/core-algebra-systems-tutorial/solving-systems-of-equations-by-elimination/", "keywords": "Solving, Systems, of, Equations, by, Elimination, CC_8_EE_8_b, CC_39336_A-REI_5, CC_39336_A-REI_6", "id": "vA-55wZtLeE", "title": "Solving systems of equations by elimination", "description": "Solving Systems of Equations by Elimination", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vA-55wZtLeE.mp4/vA-55wZtLeE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vA-55wZtLeE.mp4/vA-55wZtLeE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vA-55wZtLeE.m3u8/vA-55wZtLeE.m3u8"}, "slug": "solving-systems-of-equations-by-elimination", "video_id": "vA-55wZtLeE", "youtube_id": "vA-55wZtLeE", "readable_id": "solving-systems-of-equations-by-elimination"}, "-oHlcuS7AeU": {"duration": 482, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-intro-to-pulmonary-diseases/types-of-pulmonary-diseases/", "keywords": "", "id": "-oHlcuS7AeU", "title": "Types of pulmonary diseases", "description": "Learn what the main classifications of lung diseases are: obstructive, restrictive, ventilation, and perfusion. Discover the classification of common diseases like asthma, emphysema, and pneumonia.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-oHlcuS7AeU.mp4/-oHlcuS7AeU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-oHlcuS7AeU.mp4/-oHlcuS7AeU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-oHlcuS7AeU.m3u8/-oHlcuS7AeU.m3u8"}, "slug": "types-of-pulmonary-diseases", "video_id": "-oHlcuS7AeU", "youtube_id": "-oHlcuS7AeU", "readable_id": "types-of-pulmonary-diseases"}, "KodGZFPc474": {"duration": 696, "path": "khan/test-prep/mcat/physical-processes/stoichiometry/stoichiometry-example-problem-1-edited/", "keywords": "", "id": "KodGZFPc474", "title": "Stoichiometry example problem 1", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KodGZFPc474.mp4/KodGZFPc474.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KodGZFPc474.mp4/KodGZFPc474.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KodGZFPc474.m3u8/KodGZFPc474.m3u8"}, "slug": "stoichiometry-example-problem-1-edited", "video_id": "KodGZFPc474", "youtube_id": "KodGZFPc474", "readable_id": "stoichiometry-example-problem-1-edited"}, "xC-fQ0KEzsM": {"duration": 183, "path": "khan/math/pre-algebra/order-of-operations/ditributive_property/distributive-property-exercise/", "keywords": "", "id": "xC-fQ0KEzsM", "title": "Distributive property exercise examples", "description": "You'll be a pro applying the distributive property once you've solved these exercise examples with us.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xC-fQ0KEzsM.mp4/xC-fQ0KEzsM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xC-fQ0KEzsM.mp4/xC-fQ0KEzsM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xC-fQ0KEzsM.m3u8/xC-fQ0KEzsM.m3u8"}, "slug": "distributive-property-exercise", "video_id": "xC-fQ0KEzsM", "youtube_id": "xC-fQ0KEzsM", "readable_id": "distributive-property-exercise"}, "ty4Ohya4hdE": {"duration": 141, "path": "khan/math/algebra/quadratics/quadratic-formula/quadratic-equations-in-standard-form/", "keywords": "u16_l5_t2_we1, Quadratic, Equations, in, Standard, Form", "id": "ty4Ohya4hdE", "title": "Example: Quadratics in standard form", "description": "Quadratic Equations in Standard Form", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ty4Ohya4hdE.mp4/ty4Ohya4hdE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ty4Ohya4hdE.mp4/ty4Ohya4hdE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ty4Ohya4hdE.m3u8/ty4Ohya4hdE.m3u8"}, "slug": "quadratic-equations-in-standard-form", "video_id": "ty4Ohya4hdE", "youtube_id": "ty4Ohya4hdE", "readable_id": "quadratic-equations-in-standard-form"}, "_oodhLhuD5U": {"duration": 710, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e2-elimination-stereoselectivity/", "keywords": "", "id": "_oodhLhuD5U", "title": "E2 elimination: Stereoselectivity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_oodhLhuD5U.mp4/_oodhLhuD5U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_oodhLhuD5U.mp4/_oodhLhuD5U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_oodhLhuD5U.m3u8/_oodhLhuD5U.m3u8"}, "slug": "e2-elimination-stereoselectivity", "video_id": "_oodhLhuD5U", "youtube_id": "_oodhLhuD5U", "readable_id": "e2-elimination-stereoselectivity"}, "6FP-hLuAlr4": {"duration": 142, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial/stellar-parallax-clarification/", "keywords": "Stellar, Parallax, Clarification", "id": "6FP-hLuAlr4", "title": "Stellar parallax clarification", "description": "Stellar Parallax Clarification", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6FP-hLuAlr4.mp4/6FP-hLuAlr4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6FP-hLuAlr4.mp4/6FP-hLuAlr4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6FP-hLuAlr4.m3u8/6FP-hLuAlr4.m3u8"}, "slug": "stellar-parallax-clarification", "video_id": "6FP-hLuAlr4", "youtube_id": "6FP-hLuAlr4", "readable_id": "stellar-parallax-clarification"}, "cyZUgH4yoCo": {"duration": 721, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/sn1-vs-sn2-summary/", "keywords": "", "id": "cyZUgH4yoCo", "title": "Sn1 vs Sn2: Summary", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cyZUgH4yoCo.mp4/cyZUgH4yoCo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cyZUgH4yoCo.mp4/cyZUgH4yoCo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cyZUgH4yoCo.m3u8/cyZUgH4yoCo.m3u8"}, "slug": "sn1-vs-sn2-summary", "video_id": "cyZUgH4yoCo", "youtube_id": "cyZUgH4yoCo", "readable_id": "sn1-vs-sn2-summary"}, "hXNFjOhrihI": {"duration": 341, "path": "khan/humanities/art-islam/islamic-art-medieval/ilkhanid-mihrab-1354-55-isfahan-iran-metropolitan-museum-of-art-new-york/", "keywords": "Smarthistory, Khan Academy, Art History, Islamic Art, Art, Mihrab, Ilkhanid, Isfahan, Esfahan, Iran, Iranian Art", "id": "hXNFjOhrihI", "title": "Ilkhanid Mihrab", "description": "Mihrab (prayer niche), 1354--55 (A.H. 755), just after the Ilkhanid period, Isfahan, Iran, polychrome glazed tiles, 135-1/16 x 113-11/16 inches / 343.1 x 288.7 cm (Metropolitan Museum of Art, New York). Speakers: Dr. Elizabeth Macaulay Lewis and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hXNFjOhrihI.mp4/hXNFjOhrihI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hXNFjOhrihI.mp4/hXNFjOhrihI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hXNFjOhrihI.m3u8/hXNFjOhrihI.m3u8"}, "slug": "ilkhanid-mihrab-1354-55-isfahan-iran-metropolitan-museum-of-art-new-york", "video_id": "hXNFjOhrihI", "youtube_id": "hXNFjOhrihI", "readable_id": "ilkhanid-mihrab-1354-55-isfahan-iran-metropolitan-museum-of-art-new-york"}, "uK3M7RGqJFQ": {"duration": 374, "path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/stereotypes-stereotype-threat-and-self-fulfilling-prophecies/", "keywords": "", "id": "uK3M7RGqJFQ", "title": "Stereotypes stereotype threat and self fulfilling prophecies", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uK3M7RGqJFQ.mp4/uK3M7RGqJFQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uK3M7RGqJFQ.mp4/uK3M7RGqJFQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uK3M7RGqJFQ.m3u8/uK3M7RGqJFQ.m3u8"}, "slug": "stereotypes-stereotype-threat-and-self-fulfilling-prophecies", "video_id": "uK3M7RGqJFQ", "youtube_id": "uK3M7RGqJFQ", "readable_id": "stereotypes-stereotype-threat-and-self-fulfilling-prophecies"}, "11iYk0Yrx3g": {"duration": 712, "path": "khan/partner-content/cas-biodiversity/biodiversity-origin/evolutionary-causes/genetic-variation-gene-flow-and-new-species/", "keywords": "", "id": "11iYk0Yrx3g", "title": "Genetic variation, gene flow, and new species", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/11iYk0Yrx3g.mp4/11iYk0Yrx3g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/11iYk0Yrx3g.mp4/11iYk0Yrx3g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/11iYk0Yrx3g.m3u8/11iYk0Yrx3g.m3u8"}, "slug": "genetic-variation-gene-flow-and-new-species", "video_id": "11iYk0Yrx3g", "youtube_id": "11iYk0Yrx3g", "readable_id": "genetic-variation-gene-flow-and-new-species"}, "L70uKS_4wGM": {"duration": 124, "path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/cheminresults/", "keywords": "", "id": "L70uKS_4wGM", "title": "First CheMin results", "description": "Nov 1st 2012", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L70uKS_4wGM.mp4/L70uKS_4wGM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L70uKS_4wGM.mp4/L70uKS_4wGM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L70uKS_4wGM.m3u8/L70uKS_4wGM.m3u8"}, "slug": "cheminresults", "video_id": "L70uKS_4wGM", "youtube_id": "L70uKS_4wGM", "readable_id": "cheminresults"}, "wTy2EZZWDUo": {"duration": 159, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-13/", "keywords": "", "id": "wTy2EZZWDUo", "title": "13 Solving system for x+y", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wTy2EZZWDUo.mp4/wTy2EZZWDUo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wTy2EZZWDUo.mp4/wTy2EZZWDUo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wTy2EZZWDUo.m3u8/wTy2EZZWDUo.m3u8"}, "slug": "2013-sat-practice-6-13", "video_id": "wTy2EZZWDUo", "youtube_id": "wTy2EZZWDUo", "readable_id": "2013-sat-practice-6-13"}, "G3bO8RcRgxQ": {"duration": 666, "path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/viscosity-and-poiseuille-flow/", "keywords": "", "id": "G3bO8RcRgxQ", "title": "Viscosity and Poiseuille flow", "description": "David explains the concept of viscosity, viscous force, and Poiseuille's law.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/G3bO8RcRgxQ.mp4/G3bO8RcRgxQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/G3bO8RcRgxQ.mp4/G3bO8RcRgxQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/G3bO8RcRgxQ.m3u8/G3bO8RcRgxQ.m3u8"}, "slug": "viscosity-and-poiseuille-flow", "video_id": "G3bO8RcRgxQ", "youtube_id": "G3bO8RcRgxQ", "readable_id": "viscosity-and-poiseuille-flow"}, "nu87kfmwNfU": {"duration": 543, "path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-determinants-along-other-rows-cols/", "keywords": "determinant, row, column", "id": "nu87kfmwNfU", "title": "Determinants along other rows/cols", "description": "Finding the determinant by going along other rows or columns", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nu87kfmwNfU.mp4/nu87kfmwNfU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nu87kfmwNfU.mp4/nu87kfmwNfU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nu87kfmwNfU.m3u8/nu87kfmwNfU.m3u8"}, "slug": "linear-algebra-determinants-along-other-rows-cols", "video_id": "nu87kfmwNfU", "youtube_id": "nu87kfmwNfU", "readable_id": "linear-algebra-determinants-along-other-rows-cols"}, "DR42xdsLWkc": {"duration": 157, "path": "khan/partner-content/wi-phi/critical-thinking/intrinsic-extrinsic-value/", "keywords": "", "id": "DR42xdsLWkc", "title": "Fundamentals: Intrinsic vs. Instrumental Value", "description": "What sort of things do we value and why? In this video Kelley distinguishes two different kinds of value: (1) Intrinsic value--the value that something has in itself--and (2) instrumental value--the value that something has because it helps us to get or achieve some other thing. This philosophically and practically useful distinction is illuminated through the use of plenty of examples and ordinary language glosses.\u00a0\n\nSpeaker:\u00a0Kelly Schiffman", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DR42xdsLWkc.mp4/DR42xdsLWkc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DR42xdsLWkc.mp4/DR42xdsLWkc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DR42xdsLWkc.m3u8/DR42xdsLWkc.m3u8"}, "slug": "intrinsic-extrinsic-value", "video_id": "DR42xdsLWkc", "youtube_id": "DR42xdsLWkc", "readable_id": "intrinsic-extrinsic-value"}, "FxkTSjctXdk": {"duration": 802, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/the-discount-rate/", "keywords": "federal, reserve, target, rate, deferal, funds, discount, window", "id": "FxkTSjctXdk", "title": "The discount rate", "description": "The discount rate and window. Lender of last resort.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FxkTSjctXdk.mp4/FxkTSjctXdk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FxkTSjctXdk.mp4/FxkTSjctXdk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FxkTSjctXdk.m3u8/FxkTSjctXdk.m3u8"}, "slug": "the-discount-rate", "video_id": "FxkTSjctXdk", "youtube_id": "FxkTSjctXdk", "readable_id": "the-discount-rate"}, "M8Cbv0yptNE": {"duration": 120, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-12/", "keywords": "", "id": "M8Cbv0yptNE", "title": "12 Probability satisfying inequality", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M8Cbv0yptNE.mp4/M8Cbv0yptNE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M8Cbv0yptNE.mp4/M8Cbv0yptNE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M8Cbv0yptNE.m3u8/M8Cbv0yptNE.m3u8"}, "slug": "sat-getting-ready-2-12", "video_id": "M8Cbv0yptNE", "youtube_id": "M8Cbv0yptNE", "readable_id": "sat-getting-ready-2-12"}, "EOpzN8ZHqpU": {"duration": 540, "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex3-part-1-parameterizing-the-outside-surface/", "keywords": "surface, integral", "id": "EOpzN8ZHqpU", "title": "Surface integral ex3 part 1: Parameterizing the outside surface", "description": "Breaking apart a larger surface into its components", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EOpzN8ZHqpU.mp4/EOpzN8ZHqpU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EOpzN8ZHqpU.mp4/EOpzN8ZHqpU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EOpzN8ZHqpU.m3u8/EOpzN8ZHqpU.m3u8"}, "slug": "surface-integral-ex3-part-1-parameterizing-the-outside-surface", "video_id": "EOpzN8ZHqpU", "youtube_id": "EOpzN8ZHqpU", "readable_id": "surface-integral-ex3-part-1-parameterizing-the-outside-surface"}, "L82bDTBMGUU": {"duration": 251, "path": "khan/test-prep/mcat/organ-systems/neural-cells/introduction-to-neural-cell-types/", "keywords": "", "id": "L82bDTBMGUU", "title": "Introduction to neural cell types", "description": "This video provides an introduction to the cell types of the nervous system. By Matt Jensen.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L82bDTBMGUU.mp4/L82bDTBMGUU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L82bDTBMGUU.mp4/L82bDTBMGUU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L82bDTBMGUU.m3u8/L82bDTBMGUU.m3u8"}, "slug": "introduction-to-neural-cell-types", "video_id": "L82bDTBMGUU", "youtube_id": "L82bDTBMGUU", "readable_id": "introduction-to-neural-cell-types"}, "o31cLUkS23E": {"duration": 71, "path": "khan/math/algebra-basics/core-algebra-foundations/operations-with-decimals/subtracting-decimals-up-to-hundredths/", "keywords": "", "id": "o31cLUkS23E", "title": "Subtracting decimals: example 1", "description": "Subtracting decimals...up to the hundredths placement. Line up those decimals before you start.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o31cLUkS23E.mp4/o31cLUkS23E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o31cLUkS23E.mp4/o31cLUkS23E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o31cLUkS23E.m3u8/o31cLUkS23E.m3u8"}, "slug": "subtracting-decimals-up-to-hundredths", "video_id": "o31cLUkS23E", "youtube_id": "o31cLUkS23E", "readable_id": "subtracting-decimals-up-to-hundredths"}, "6P2bsPWCRvM": {"duration": 466, "path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-transition/", "keywords": "", "id": "6P2bsPWCRvM", "title": "Demographic transition", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6P2bsPWCRvM.mp4/6P2bsPWCRvM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6P2bsPWCRvM.mp4/6P2bsPWCRvM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6P2bsPWCRvM.m3u8/6P2bsPWCRvM.m3u8"}, "slug": "demographic-transition", "video_id": "6P2bsPWCRvM", "youtube_id": "6P2bsPWCRvM", "readable_id": "demographic-transition"}, "p729tFmpOXg": {"duration": 243, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-number-mult-div-pre-alg/multiplying-fractions-and-mixed-numbers/", "keywords": "U02_L2_T1_we2, Multiplying, Fractions, and, Mixed, Numbers, CC_5_NF_6", "id": "p729tFmpOXg", "title": "Multiplying fractions and whole numbers: mixed number answer", "description": "Sometimes the product of multiplying fractions and whole numbers is a mixed number. Mixed up? You won't be for long!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p729tFmpOXg.mp4/p729tFmpOXg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p729tFmpOXg.mp4/p729tFmpOXg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p729tFmpOXg.m3u8/p729tFmpOXg.m3u8"}, "slug": "multiplying-fractions-and-mixed-numbers", "video_id": "p729tFmpOXg", "youtube_id": "p729tFmpOXg", "readable_id": "multiplying-fractions-and-mixed-numbers"}, "oyPNjYlboaw": {"duration": 178, "path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/reciprocal-determinism/", "keywords": "", "id": "oyPNjYlboaw", "title": "Reciprocal determinism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oyPNjYlboaw.mp4/oyPNjYlboaw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oyPNjYlboaw.mp4/oyPNjYlboaw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oyPNjYlboaw.m3u8/oyPNjYlboaw.m3u8"}, "slug": "reciprocal-determinism", "video_id": "oyPNjYlboaw", "youtube_id": "oyPNjYlboaw", "readable_id": "reciprocal-determinism"}, "R_5slDeVCQk": {"duration": 617, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/roa-discussion-2/", "keywords": "return, on, asset, roa", "id": "R_5slDeVCQk", "title": "ROA discussion 2", "description": "More on the return on asset discussion.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R_5slDeVCQk.mp4/R_5slDeVCQk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R_5slDeVCQk.mp4/R_5slDeVCQk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R_5slDeVCQk.m3u8/R_5slDeVCQk.m3u8"}, "slug": "roa-discussion-2", "video_id": "R_5slDeVCQk", "youtube_id": "R_5slDeVCQk", "readable_id": "roa-discussion-2"}, "3mUi9IZb4T4": {"duration": 508, "path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/fractional-reserve-banking-tut/overview-of-fractional-reserve-banking/", "keywords": "money, supply, macroeconomics", "id": "3mUi9IZb4T4", "title": "Overview of fractional reserve banking", "description": "Big picture of how money enters circulation and how lending can increase the money supply", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3mUi9IZb4T4.mp4/3mUi9IZb4T4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3mUi9IZb4T4.mp4/3mUi9IZb4T4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3mUi9IZb4T4.m3u8/3mUi9IZb4T4.m3u8"}, "slug": "overview-of-fractional-reserve-banking", "video_id": "3mUi9IZb4T4", "youtube_id": "3mUi9IZb4T4", "readable_id": "overview-of-fractional-reserve-banking"}, "BNHLzEv6Mjg": {"duration": 206, "path": "khan/math/algebra/systems-of-linear-equations/analyzing-the-solutions-to-systems-of-equations/solving-systems-by-graphing-2/", "keywords": "U06_L1_T1_we2, Solving, systems, by, graphing, CC_8_EE_8_a, CC_8_EE_8_b, CC_8_EE_8_c, CC_39336_A-REI_6", "id": "BNHLzEv6Mjg", "title": "How to determine the number of solutions of a system of equations given its graph (example)", "description": "Sal is given three lines on the coordinate plane, and identifies one system of two lines that has a single solution, and one system that has no solution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BNHLzEv6Mjg.mp4/BNHLzEv6Mjg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BNHLzEv6Mjg.mp4/BNHLzEv6Mjg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BNHLzEv6Mjg.m3u8/BNHLzEv6Mjg.m3u8"}, "slug": "solving-systems-by-graphing-2", "video_id": "BNHLzEv6Mjg", "youtube_id": "BNHLzEv6Mjg", "readable_id": "solving-systems-by-graphing-2"}, "q0zlBUbcWWQ": {"duration": 138, "path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/papyrus-preserved-british-museum/", "keywords": "British Museum", "id": "q0zlBUbcWWQ", "title": "Ancient Egyptian papyrus in the Book of the Dead Exhibition", "description": "Preparing pieces of papyrus ready for display in the exhibition Journey through the afterlife: ancient Egyptian Book of the Dead. \u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q0zlBUbcWWQ.mp4/q0zlBUbcWWQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q0zlBUbcWWQ.mp4/q0zlBUbcWWQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q0zlBUbcWWQ.m3u8/q0zlBUbcWWQ.m3u8"}, "slug": "papyrus-preserved-british-museum", "video_id": "q0zlBUbcWWQ", "youtube_id": "q0zlBUbcWWQ", "readable_id": "papyrus-preserved-british-museum"}, "9dS7bc_2bUE": {"duration": 395, "path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/hypothalamus-and-pituitary-gland/", "keywords": "hypothalamus, pituitary gland", "id": "9dS7bc_2bUE", "title": "The hypothalamus and pituitary gland", "description": "What makes the endocrine organs tick? Find out in this video about the hypothalamus and pituitary glands! \u00a0By Ryan Patton.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9dS7bc_2bUE.mp4/9dS7bc_2bUE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9dS7bc_2bUE.mp4/9dS7bc_2bUE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9dS7bc_2bUE.m3u8/9dS7bc_2bUE.m3u8"}, "slug": "hypothalamus-and-pituitary-gland", "video_id": "9dS7bc_2bUE", "youtube_id": "9dS7bc_2bUE", "readable_id": "hypothalamus-and-pituitary-gland"}, "DSvLJZnH2KQ": {"duration": 455, "path": "khan/humanities/art-asia/korea-japan/joseon-dynasty/nine-cloud-dream/", "keywords": "", "id": "DSvLJZnH2KQ", "title": "Nine Cloud Dream", "description": "This video re-tells a popular Korean folktale using a Korean folding screen from the collection of the Asian Art Museum. Learn more about Asian art and culture at education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DSvLJZnH2KQ.mp4/DSvLJZnH2KQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DSvLJZnH2KQ.mp4/DSvLJZnH2KQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DSvLJZnH2KQ.m3u8/DSvLJZnH2KQ.m3u8"}, "slug": "nine-cloud-dream", "video_id": "DSvLJZnH2KQ", "youtube_id": "DSvLJZnH2KQ", "readable_id": "nine-cloud-dream"}, "cfr-yZxTH8Y": {"duration": 260, "path": "khan/math/pre-algebra/decimals-pre-alg/dividing-decimals-pre-alg/dividing-a-whole-number-by-a-decimal/", "keywords": "", "id": "cfr-yZxTH8Y", "title": "Dividing a whole number by a decimal", "description": "When dividing a whole number by a decimal, you're going to need to change that decimal into a whole number. How? We'll show you.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cfr-yZxTH8Y.mp4/cfr-yZxTH8Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cfr-yZxTH8Y.mp4/cfr-yZxTH8Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cfr-yZxTH8Y.m3u8/cfr-yZxTH8Y.m3u8"}, "slug": "dividing-a-whole-number-by-a-decimal", "video_id": "cfr-yZxTH8Y", "youtube_id": "cfr-yZxTH8Y", "readable_id": "dividing-a-whole-number-by-a-decimal"}, "ZLC8xRNcJvE": {"duration": 320, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/lawrence-migration-series/", "keywords": "art history, smarthistory, Lawrence, migration series, ", "id": "ZLC8xRNcJvE", "title": "Jacob Lawrence, The Migration Series (*short version*)", "description": "Jacob Lawrence, The Migration Series, 1940-41, 60 panels, tempera on hardboard (even numbers at The Museum of Modern Art, odd numbers at the Phillips Collection) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZLC8xRNcJvE.mp4/ZLC8xRNcJvE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZLC8xRNcJvE.mp4/ZLC8xRNcJvE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZLC8xRNcJvE.m3u8/ZLC8xRNcJvE.m3u8"}, "slug": "lawrence-migration-series", "video_id": "ZLC8xRNcJvE", "youtube_id": "ZLC8xRNcJvE", "readable_id": "lawrence-migration-series"}, "h7-OynSK2x0": {"duration": 379, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-congenital-syphilis/", "keywords": "", "id": "h7-OynSK2x0", "title": "What is congenital syphilis?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h7-OynSK2x0.mp4/h7-OynSK2x0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h7-OynSK2x0.mp4/h7-OynSK2x0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h7-OynSK2x0.m3u8/h7-OynSK2x0.m3u8"}, "slug": "what-is-congenital-syphilis", "video_id": "h7-OynSK2x0", "youtube_id": "h7-OynSK2x0", "readable_id": "what-is-congenital-syphilis"}, "DhiiGFuUE9I": {"duration": 299, "path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/interpreting-visual-linear-inequality-word-problem/", "keywords": "education,online learning,learning,lessons", "id": "DhiiGFuUE9I", "title": "How to analyze the graph of a two-variable linear inequality in terms of its context (example)", "description": "Sal is given the graph of a two-variable linear inequality that models a context about dog biscuits! He analyzes it to learn about the context and to check a possible solution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DhiiGFuUE9I.mp4/DhiiGFuUE9I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DhiiGFuUE9I.mp4/DhiiGFuUE9I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DhiiGFuUE9I.m3u8/DhiiGFuUE9I.m3u8"}, "slug": "interpreting-visual-linear-inequality-word-problem", "video_id": "DhiiGFuUE9I", "youtube_id": "DhiiGFuUE9I", "readable_id": "interpreting-visual-linear-inequality-word-problem"}, "Oh4H3BJX1ZI": {"duration": 631, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/roa-discussion-1/", "keywords": "roa, return, on, assets", "id": "Oh4H3BJX1ZI", "title": "ROA discussion 1", "description": "A discussion of the various ways to measure return on assets", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Oh4H3BJX1ZI.mp4/Oh4H3BJX1ZI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Oh4H3BJX1ZI.mp4/Oh4H3BJX1ZI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Oh4H3BJX1ZI.m3u8/Oh4H3BJX1ZI.m3u8"}, "slug": "roa-discussion-1", "video_id": "Oh4H3BJX1ZI", "youtube_id": "Oh4H3BJX1ZI", "readable_id": "roa-discussion-1"}, "dkxnUlg-bUY": {"duration": 659, "path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/crash-course-world-history-28/", "keywords": "crash course", "id": "dkxnUlg-bUY", "title": "Tea, Taxes, and the American Revolution", "description": "In which John Green teaches you about the American Revolution and the American Revolutionary War, which it turns out were two different things. John goes over the issues and events that precipitated rebellion in Britain's American colonies, and he also explores the ideas that laid the groundwork for the new American democracy. Find out how the tax bill from the Seven Years War fomented an uprising, how the Enlightenment influenced the Founding Fathers, and who were the winners and losers in this conflict.(hint: many of the people living in the Colonies ended up losers) The Revolution purportedly brought freedom and equality to the Thirteen Colonies, but they weren't equally distributed. Also, you'll learn about America's love affair with commemorative ceramics and what happens when rich white guys take the reins from reins white guys, and put together a society of, by, and for rich white guys.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dkxnUlg-bUY.mp4/dkxnUlg-bUY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dkxnUlg-bUY.mp4/dkxnUlg-bUY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dkxnUlg-bUY.m3u8/dkxnUlg-bUY.m3u8"}, "slug": "crash-course-world-history-28", "video_id": "dkxnUlg-bUY", "youtube_id": "dkxnUlg-bUY", "readable_id": "crash-course-world-history-28"}, "ZrMw7P6P2Gw": {"duration": 740, "path": "khan/test-prep/mcat/physical-processes/current-and-resistance/circuits-part-3/", "keywords": "parallel, resistors", "id": "ZrMw7P6P2Gw", "title": "Resistors in parallel", "description": "Resistors in parallel", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZrMw7P6P2Gw.mp4/ZrMw7P6P2Gw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZrMw7P6P2Gw.mp4/ZrMw7P6P2Gw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZrMw7P6P2Gw.m3u8/ZrMw7P6P2Gw.m3u8"}, "slug": "circuits-part-3", "video_id": "ZrMw7P6P2Gw", "youtube_id": "ZrMw7P6P2Gw", "readable_id": "circuits-part-3"}, "tLBLn6taNI4": {"duration": 1040, "path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/fatty-acid-synthesis-part-ii/", "keywords": "", "id": "tLBLn6taNI4", "title": "Fatty Acid Synthesis - Part II", "description": "1D: What are the sources of fatty acids in the blood stream? Where are fatty acids synthesized? How are the synthesized?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tLBLn6taNI4.mp4/tLBLn6taNI4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tLBLn6taNI4.mp4/tLBLn6taNI4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tLBLn6taNI4.m3u8/tLBLn6taNI4.m3u8"}, "slug": "fatty-acid-synthesis-part-ii", "video_id": "tLBLn6taNI4", "youtube_id": "tLBLn6taNI4", "readable_id": "fatty-acid-synthesis-part-ii"}, "p34OOHjoyH4": {"duration": 303, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q3-harder/", "keywords": "", "id": "p34OOHjoyH4", "title": "Units \u2014 Harder example", "description": "Watch Sal work through a harder Units problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p34OOHjoyH4.mp4/p34OOHjoyH4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p34OOHjoyH4.mp4/p34OOHjoyH4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p34OOHjoyH4.m3u8/p34OOHjoyH4.m3u8"}, "slug": "sat-math-q3-harder", "video_id": "p34OOHjoyH4", "youtube_id": "p34OOHjoyH4", "readable_id": "sat-math-q3-harder"}, "Ny0b9xO2sgY": {"duration": 295, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-shigellosis/", "keywords": "Shigellosis (Disease Or Medical Condition),Health (Industry)", "id": "Ny0b9xO2sgY", "title": "What is shigellosis?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ny0b9xO2sgY.mp4/Ny0b9xO2sgY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ny0b9xO2sgY.mp4/Ny0b9xO2sgY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ny0b9xO2sgY.m3u8/Ny0b9xO2sgY.m3u8"}, "slug": "what-is-shigellosis", "video_id": "Ny0b9xO2sgY", "youtube_id": "Ny0b9xO2sgY", "readable_id": "what-is-shigellosis"}, "Rgr1vRjxzFg": {"duration": 298, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/gdp-components-tutorial/components-of-gdp/", "keywords": "macroeconomics, Gross Domestic Product", "id": "Rgr1vRjxzFg", "title": "Components of GDP", "description": "Understanding the components of the expenditure view of GDP. Consumption, investment, government spending and net exports", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Rgr1vRjxzFg.mp4/Rgr1vRjxzFg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Rgr1vRjxzFg.mp4/Rgr1vRjxzFg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Rgr1vRjxzFg.m3u8/Rgr1vRjxzFg.m3u8"}, "slug": "components-of-gdp", "video_id": "Rgr1vRjxzFg", "youtube_id": "Rgr1vRjxzFg", "readable_id": "components-of-gdp"}, "y9MGpOGQVqQ": {"duration": 155, "path": "khan/math/algebra/linear_inequalities/compound_absolute_value_inequali/absolute-value-inequalities-example-3/", "keywords": "U05_L1_T2_we3, Absolute, value, inequalities, CC_6_EE_8, CC_6_NS_7_a, CC_6_NS_7_c, CC_7_NS_1, CC_8_EE_7_a", "id": "y9MGpOGQVqQ", "title": "Absolute value inequalities example 3", "description": "Absolute value inequalities 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y9MGpOGQVqQ.mp4/y9MGpOGQVqQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y9MGpOGQVqQ.mp4/y9MGpOGQVqQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y9MGpOGQVqQ.m3u8/y9MGpOGQVqQ.m3u8"}, "slug": "absolute-value-inequalities-example-3", "video_id": "y9MGpOGQVqQ", "youtube_id": "y9MGpOGQVqQ", "readable_id": "absolute-value-inequalities-example-3"}, "5MUAgzSUHRc": {"duration": 491, "path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/snells-law-example-1-edited/", "keywords": "", "id": "5MUAgzSUHRc", "title": "Snell's law example 1", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5MUAgzSUHRc.mp4/5MUAgzSUHRc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5MUAgzSUHRc.mp4/5MUAgzSUHRc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5MUAgzSUHRc.m3u8/5MUAgzSUHRc.m3u8"}, "slug": "snells-law-example-1-edited", "video_id": "5MUAgzSUHRc", "youtube_id": "5MUAgzSUHRc", "readable_id": "snells-law-example-1-edited"}, "LieVEfI4luw": {"duration": 345, "path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/diagnosis-of-dementia-and-alzheimers-disease/", "keywords": "Dementia (Disease Or Medical Condition),Diagnosis (Literature Subject),Alzheimer's Disease (Disease Or Medical Condition),Disease (Cause Of Death),Health (Industry)", "id": "LieVEfI4luw", "title": "Diagnosis of dementia and Alzheimer's disease", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LieVEfI4luw.mp4/LieVEfI4luw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LieVEfI4luw.mp4/LieVEfI4luw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LieVEfI4luw.m3u8/LieVEfI4luw.m3u8"}, "slug": "diagnosis-of-dementia-and-alzheimers-disease", "video_id": "LieVEfI4luw", "youtube_id": "LieVEfI4luw", "readable_id": "diagnosis-of-dementia-and-alzheimers-disease"}, "T0fq3XFfxrY": {"duration": 180, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/veristic-male-portrait/", "keywords": "", "id": "T0fq3XFfxrY", "title": "Veristic Male Portrait", "description": "Veristic male portrait (similar to Head of a Roman Patrician), early 1st Century B.C.E., marble life size (Vatican Museums, Rome) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T0fq3XFfxrY.mp4/T0fq3XFfxrY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T0fq3XFfxrY.mp4/T0fq3XFfxrY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T0fq3XFfxrY.m3u8/T0fq3XFfxrY.m3u8"}, "slug": "veristic-male-portrait", "video_id": "T0fq3XFfxrY", "youtube_id": "T0fq3XFfxrY", "readable_id": "veristic-male-portrait"}, "6DE6PNg58tM": {"duration": 28, "path": "khan/science/discoveries-projects/robots/spider_bot/fun-with-a-spider-bot/", "keywords": "", "id": "6DE6PNg58tM", "title": "Fun with Spider Bot", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6DE6PNg58tM.mp4/6DE6PNg58tM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6DE6PNg58tM.mp4/6DE6PNg58tM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6DE6PNg58tM.m3u8/6DE6PNg58tM.m3u8"}, "slug": "fun-with-a-spider-bot", "video_id": "6DE6PNg58tM", "youtube_id": "6DE6PNg58tM", "readable_id": "fun-with-a-spider-bot"}, "vbAbCp9elFU": {"duration": 280, "path": "khan/humanities/history/1600s-1800s/benjamin-franklin/franklin-takeaways/", "keywords": "", "id": "vbAbCp9elFU", "title": "Takeaways from Benjamin Franklin's life", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson discuss takeaways from Benjamin Franklin's life.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vbAbCp9elFU.mp4/vbAbCp9elFU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vbAbCp9elFU.mp4/vbAbCp9elFU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vbAbCp9elFU.m3u8/vbAbCp9elFU.m3u8"}, "slug": "franklin-takeaways", "video_id": "vbAbCp9elFU", "youtube_id": "vbAbCp9elFU", "readable_id": "franklin-takeaways"}, "6w2E8G0sEPc": {"duration": 409, "path": "khan/humanities/renaissance-reformation/mannerism1/bronzino-an-allegory-with-venus-and-cupid/", "keywords": "Bronzino, Mannerism, Mannerist, Allegory, Florence, Italy, Italian, Francis I, Cosimo, painting, art, art history, love, jealousy, regret, folly, Venus, Cupid, mask, masks, time, Cronos, doves, night, oblivion, fraud", "id": "6w2E8G0sEPc", "title": "Bronzino, An Allegory with Venus and Cupid", "description": "Agnolo di Cosimo Bronzino, An Allegory with Venus and Cupid, c. 1545, oil on panel, 146.1 x 116.2 cm (National Gallery, London) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nThis passage by Vasari is most likely related to this canvas:\n\n\"And he painted a picture of singular beauty that was sent to King Francis in France, wherein was a nude Venus, with a Cupid who was kissing her, and Pleasure on one side with Play and other Loves, and on the other side Fraud and Jealousy and other passions of love.\" Giorgio Vasari,\u00a0Lives of the most Eminent Painters Sculptors and Architects,\u00a0volume 10, trans: Gaston du C. De Vere (London: Medici Society, 1912-15)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6w2E8G0sEPc.mp4/6w2E8G0sEPc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6w2E8G0sEPc.mp4/6w2E8G0sEPc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6w2E8G0sEPc.m3u8/6w2E8G0sEPc.m3u8"}, "slug": "bronzino-an-allegory-with-venus-and-cupid", "video_id": "6w2E8G0sEPc", "youtube_id": "6w2E8G0sEPc", "readable_id": "bronzino-an-allegory-with-venus-and-cupid"}, "x5EJG_rAtkY": {"duration": 450, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/absolute-value-equations/absolute-inequalities-2/", "keywords": "U05_L1_T2_we2, Absolute, Inequalities, CC_6_EE_8, CC_6_NS_7_a, CC_6_NS_7_c, CC_7_NS_1", "id": "x5EJG_rAtkY", "title": "Absolute inequalities 2", "description": "Absolute Inequalities 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x5EJG_rAtkY.mp4/x5EJG_rAtkY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x5EJG_rAtkY.mp4/x5EJG_rAtkY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x5EJG_rAtkY.m3u8/x5EJG_rAtkY.m3u8"}, "slug": "absolute-inequalities-2", "video_id": "x5EJG_rAtkY", "youtube_id": "x5EJG_rAtkY", "readable_id": "absolute-inequalities-2"}, "WkmPDOq2WfA": {"duration": 441, "path": "khan/math/recreational-math/vi-hart/singing/folding-space-time/", "keywords": "", "id": "WkmPDOq2WfA", "title": "Folding space-time", "description": "Music box, backwards Bach, orbifolds and wooden bowl.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WkmPDOq2WfA.mp4/WkmPDOq2WfA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WkmPDOq2WfA.mp4/WkmPDOq2WfA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WkmPDOq2WfA.m3u8/WkmPDOq2WfA.m3u8"}, "slug": "folding-space-time", "video_id": "WkmPDOq2WfA", "youtube_id": "WkmPDOq2WfA", "readable_id": "folding-space-time"}, "9dbb6oITDa0": {"duration": 397, "path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/oil-paint/", "keywords": "", "id": "9dbb6oITDa0", "title": "Oil paint", "description": "Speakers: Dr. Steven Zucker, Isaac Peterson, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9dbb6oITDa0.mp4/9dbb6oITDa0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9dbb6oITDa0.mp4/9dbb6oITDa0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9dbb6oITDa0.m3u8/9dbb6oITDa0.m3u8"}, "slug": "oil-paint", "video_id": "9dbb6oITDa0", "youtube_id": "9dbb6oITDa0", "readable_id": "oil-paint"}, "Q7UL8hvlk7k": {"duration": 61, "path": "khan/partner-content/nasa/searchingforlife/exploring_mars_ancient/mars-in-a-minute-is-mars-really-red/", "keywords": "", "id": "Q7UL8hvlk7k", "title": "Is Mars really red?", "description": "Mars in a minute: Is Mars really red?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q7UL8hvlk7k.mp4/Q7UL8hvlk7k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q7UL8hvlk7k.mp4/Q7UL8hvlk7k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q7UL8hvlk7k.m3u8/Q7UL8hvlk7k.m3u8"}, "slug": "mars-in-a-minute-is-mars-really-red", "video_id": "Q7UL8hvlk7k", "youtube_id": "Q7UL8hvlk7k", "readable_id": "mars-in-a-minute-is-mars-really-red"}, "4mpFcaeElCs": {"duration": 630, "path": "khan/humanities/renaissance-reformation/mannerism1/bronzino-the-mannerist-portrait/", "keywords": "Bronzino, portraits, art, art history, smarthistory, Mannerism", "id": "4mpFcaeElCs", "title": "Bronzino and the Mannerist Portrait", "description": "Bronzino\u00a0Portrait of a Young Man, oil on panel, 1530s (Metropolitan Museum of Art) and Bronzino, Lodovico Capponi, Oil on panel, 1550-55 (Frick Collection) Speakers: David Drogin and Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4mpFcaeElCs.mp4/4mpFcaeElCs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4mpFcaeElCs.mp4/4mpFcaeElCs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4mpFcaeElCs.m3u8/4mpFcaeElCs.m3u8"}, "slug": "bronzino-the-mannerist-portrait", "video_id": "4mpFcaeElCs", "youtube_id": "4mpFcaeElCs", "readable_id": "bronzino-the-mannerist-portrait"}, "7K2icszdxQc": {"duration": 583, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/electrical-system-of-the-heart/", "keywords": "", "id": "7K2icszdxQc", "title": "Electrical system of the heart", "description": "See where the pacemaker cells start the electrical wave of depolarization, and how it gets all the way to the ventricles of the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7K2icszdxQc.mp4/7K2icszdxQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7K2icszdxQc.mp4/7K2icszdxQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7K2icszdxQc.m3u8/7K2icszdxQc.m3u8"}, "slug": "electrical-system-of-the-heart", "video_id": "7K2icszdxQc", "youtube_id": "7K2icszdxQc", "readable_id": "electrical-system-of-the-heart"}, "BXdXw-7Q82o": {"duration": 425, "path": "khan/partner-content/wi-phi/value-theory-1/race-racist-institutions/", "keywords": "Philosophy (Field Of Study),Racism (Quotation Subject),Race (Literature Subject),Political Philosophy (Field Of Study),Wiphi,Wireless Philosophy,Pennsylvania State University (College/University),State University Of New York At Stony Brook (College/University),Eduard Mendieta,Institution (Quotation Subject),Slavery (Quotation Subject),Western Philosophy (Field Of Study),Angela Davis (Politician),Lo\u00efc Wacquant,Khan Academy (Nonprofit Organization)", "id": "BXdXw-7Q82o", "title": "Political: Race and Racist Institutions", "description": "In this video, Eduardo Mendieta (Penn State University) asks \"What are the consequences of race thinking and the institutional and legal forms of segregation if race is not real? Why do we categorize race as a real thing based on visual perception and how is such a category anti-democratic?\"\n\nSpeaker: Dr. Eduardo Mendieta, Professor of Philosophy, Pennsylvania State University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BXdXw-7Q82o.mp4/BXdXw-7Q82o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BXdXw-7Q82o.mp4/BXdXw-7Q82o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BXdXw-7Q82o.m3u8/BXdXw-7Q82o.m3u8"}, "slug": "race-racist-institutions", "video_id": "BXdXw-7Q82o", "youtube_id": "BXdXw-7Q82o", "readable_id": "race-racist-institutions"}, "s9t7rNhaBp8": {"duration": 514, "path": "khan/math/geometry/right_triangles_topic/pyth_theor/introduction-to-the-pythagorean-theorem/", "keywords": "Geometry, Math, Khan, Academy", "id": "s9t7rNhaBp8", "title": "Introduction to the Pythagorean theorem", "description": "Right triangles and the Pythagorean Theorem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/s9t7rNhaBp8.mp4/s9t7rNhaBp8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/s9t7rNhaBp8.mp4/s9t7rNhaBp8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/s9t7rNhaBp8.m3u8/s9t7rNhaBp8.m3u8"}, "slug": "introduction-to-the-pythagorean-theorem", "video_id": "s9t7rNhaBp8", "youtube_id": "s9t7rNhaBp8", "readable_id": "introduction-to-the-pythagorean-theorem"}, "7MjHWw3p710": {"duration": 235, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/company-statements-capital-struc/gross-and-operating-profit/", "keywords": "", "id": "7MjHWw3p710", "title": "Gross and operating profit", "description": "Difference between gross profit, operating profit, and net income.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7MjHWw3p710.mp4/7MjHWw3p710.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7MjHWw3p710.mp4/7MjHWw3p710.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7MjHWw3p710.m3u8/7MjHWw3p710.m3u8"}, "slug": "gross-and-operating-profit", "video_id": "7MjHWw3p710", "youtube_id": "7MjHWw3p710", "readable_id": "gross-and-operating-profit"}, "E4rbS0oxg30": {"duration": 667, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/random-predictions-for-2060/", "keywords": "Random, Predictions, for, 2060", "id": "E4rbS0oxg30", "title": "Random predictions for 2060", "description": "Sal's random predictions for the year 2060", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E4rbS0oxg30.mp4/E4rbS0oxg30.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E4rbS0oxg30.mp4/E4rbS0oxg30.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E4rbS0oxg30.m3u8/E4rbS0oxg30.m3u8"}, "slug": "random-predictions-for-2060", "video_id": "E4rbS0oxg30", "youtube_id": "E4rbS0oxg30", "readable_id": "random-predictions-for-2060"}, "VrflZifKIuw": {"duration": 576, "path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/center-of-mass/", "keywords": "physics, center, of, mass, force, acceleration", "id": "VrflZifKIuw", "title": "Center of mass", "description": "Introduction to the center of mass", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VrflZifKIuw.mp4/VrflZifKIuw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VrflZifKIuw.mp4/VrflZifKIuw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VrflZifKIuw.m3u8/VrflZifKIuw.m3u8"}, "slug": "center-of-mass", "video_id": "VrflZifKIuw", "youtube_id": "VrflZifKIuw", "readable_id": "center-of-mass"}, "kpEJwpemL2Q": {"duration": 135, "path": "khan/math/early-math/cc-early-math-add-sub-basics/cc-early-math-add-subtract-10/addition-and-subtraction-within-10/", "keywords": "", "id": "kpEJwpemL2Q", "title": "Addition and subtraction within 10", "description": "See how to solve a bunch of addition and subtraction problems with small numbers. All numbers in this video are 10 or less.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kpEJwpemL2Q.mp4/kpEJwpemL2Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kpEJwpemL2Q.mp4/kpEJwpemL2Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kpEJwpemL2Q.m3u8/kpEJwpemL2Q.m3u8"}, "slug": "addition-and-subtraction-within-10", "video_id": "kpEJwpemL2Q", "youtube_id": "kpEJwpemL2Q", "readable_id": "addition-and-subtraction-within-10"}, "p4559dZIFco": {"duration": 705, "path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/solubility-product-constant-from-the-solubility/", "keywords": "", "id": "p4559dZIFco", "title": "Solubility product constant from the solubility", "description": "Introduction to solubility, molar solubility, and solubility product constant Ksp. Example of calculating the solubility of lead(II) chloride and Ksp.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p4559dZIFco.mp4/p4559dZIFco.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p4559dZIFco.mp4/p4559dZIFco.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p4559dZIFco.m3u8/p4559dZIFco.m3u8"}, "slug": "solubility-product-constant-from-the-solubility", "video_id": "p4559dZIFco", "youtube_id": "p4559dZIFco", "readable_id": "solubility-product-constant-from-the-solubility"}, "CsrUfTljLJ8": {"duration": 332, "path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/infectious-arthritis/", "keywords": "", "id": "CsrUfTljLJ8", "title": "Infectious arthritis", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CsrUfTljLJ8.mp4/CsrUfTljLJ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CsrUfTljLJ8.mp4/CsrUfTljLJ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CsrUfTljLJ8.m3u8/CsrUfTljLJ8.m3u8"}, "slug": "infectious-arthritis", "video_id": "CsrUfTljLJ8", "youtube_id": "CsrUfTljLJ8", "readable_id": "infectious-arthritis"}, "BhQUW9s-R8M": {"duration": 859, "path": "khan/test-prep/mcat/physical-processes/sound/standing-waves-in-tubes-part-1/", "keywords": "", "id": "BhQUW9s-R8M", "title": "Standing waves in tubes (part 1)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BhQUW9s-R8M.mp4/BhQUW9s-R8M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BhQUW9s-R8M.mp4/BhQUW9s-R8M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BhQUW9s-R8M.m3u8/BhQUW9s-R8M.m3u8"}, "slug": "standing-waves-in-tubes-part-1", "video_id": "BhQUW9s-R8M", "youtube_id": "BhQUW9s-R8M", "readable_id": "standing-waves-in-tubes-part-1"}, "outcfkh69U0": {"duration": 901, "path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/graphs-of-square-root-functions/", "keywords": "Graphs, of, Square, Root, Functions, CC_39336_F-BF_3, CC_39336_F-IF_7_b", "id": "outcfkh69U0", "title": "Shifting and stretching functions", "description": "Sal graphs y=\u221ax. Then, he shows a few examples of how we can shift and stretch the graphs of y=\u221ax and y=x^2, and how the equations of those graphs look.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/outcfkh69U0.mp4/outcfkh69U0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/outcfkh69U0.mp4/outcfkh69U0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/outcfkh69U0.m3u8/outcfkh69U0.m3u8"}, "slug": "graphs-of-square-root-functions", "video_id": "outcfkh69U0", "youtube_id": "outcfkh69U0", "readable_id": "graphs-of-square-root-functions"}, "HiY5UElqfhs": {"duration": 138, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/terms-explicit-sequence/", "keywords": "", "id": "HiY5UElqfhs", "title": "Finding terms of explicitly defined sequence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HiY5UElqfhs.mp4/HiY5UElqfhs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HiY5UElqfhs.mp4/HiY5UElqfhs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HiY5UElqfhs.m3u8/HiY5UElqfhs.m3u8"}, "slug": "terms-explicit-sequence", "video_id": "HiY5UElqfhs", "youtube_id": "HiY5UElqfhs", "readable_id": "terms-explicit-sequence"}, "XIsPC-f2e2c": {"duration": 186, "path": "khan/math/differential-calculus/limits_topic/limits_tutorial/limit-by-analyzing-numerical-data/", "keywords": "", "id": "XIsPC-f2e2c", "title": "Inferring limit from numerical data", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XIsPC-f2e2c.mp4/XIsPC-f2e2c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XIsPC-f2e2c.mp4/XIsPC-f2e2c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XIsPC-f2e2c.m3u8/XIsPC-f2e2c.m3u8"}, "slug": "limit-by-analyzing-numerical-data", "video_id": "XIsPC-f2e2c", "youtube_id": "XIsPC-f2e2c", "readable_id": "limit-by-analyzing-numerical-data"}, "03Y76Q7tlSw": {"duration": 343, "path": "khan/math/algebra2/polynomial-and-rational/polynomial-end-behavior/polynomial-end-behavior-example/", "keywords": "", "id": "03Y76Q7tlSw", "title": "Polynomial end behavior example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/03Y76Q7tlSw.mp4/03Y76Q7tlSw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/03Y76Q7tlSw.mp4/03Y76Q7tlSw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/03Y76Q7tlSw.m3u8/03Y76Q7tlSw.m3u8"}, "slug": "polynomial-end-behavior-example", "video_id": "03Y76Q7tlSw", "youtube_id": "03Y76Q7tlSw", "readable_id": "polynomial-end-behavior-example"}, "Iics7KH_rLE": {"duration": 205, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/monet-the-argenteuil-bridge-1874/", "keywords": "Monet, Bridge, Musee d'Orsay, Paris, Impressionism", "id": "Iics7KH_rLE", "title": "Monet, The Argenteuil Bridge", "description": "Claude Monet, The Argenteuil Bridge, 1874, oil on canvas, 60.5 x 80 cm (Mus\u00e9e d'Orsay, Paris) Speakers: Drs. Beth Harris and Steven Zucker Please note that there is significant background chatter in this video, the Mus\u00e9e d'Orsay is happily a very busy museum and this painting is hung in a relatively small room. http://www.smarthistory.org/monet-the-argenteuil-bridge.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Iics7KH_rLE.mp4/Iics7KH_rLE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Iics7KH_rLE.mp4/Iics7KH_rLE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Iics7KH_rLE.m3u8/Iics7KH_rLE.m3u8"}, "slug": "monet-the-argenteuil-bridge-1874", "video_id": "Iics7KH_rLE", "youtube_id": "Iics7KH_rLE", "readable_id": "monet-the-argenteuil-bridge-1874"}, "7zk0ubr_lzo": {"duration": 694, "path": "khan/science/health-and-medicine/healthcare-misc/systemic-thinking-about-cancer/", "keywords": "marquee", "id": "7zk0ubr_lzo", "title": "Systemic thinking about cancer", "description": "Dr. David Agus discusses thinking systemically about cancer and other things", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7zk0ubr_lzo.mp4/7zk0ubr_lzo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7zk0ubr_lzo.mp4/7zk0ubr_lzo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7zk0ubr_lzo.m3u8/7zk0ubr_lzo.m3u8"}, "slug": "systemic-thinking-about-cancer", "video_id": "7zk0ubr_lzo", "youtube_id": "7zk0ubr_lzo", "readable_id": "systemic-thinking-about-cancer"}, "Bt0mz4mGddk": {"duration": 434, "path": "khan/test-prep/mcat/chemical-processes/kinetics/first-order-reaction-with-calculus/", "keywords": "", "id": "Bt0mz4mGddk", "title": "First-order reaction (with calculus)", "description": "Deriving the integrated rate law for first-order reactions using calculus. How you can graph first-order rate data to see a linear relationship.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Bt0mz4mGddk.mp4/Bt0mz4mGddk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Bt0mz4mGddk.mp4/Bt0mz4mGddk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Bt0mz4mGddk.m3u8/Bt0mz4mGddk.m3u8"}, "slug": "first-order-reaction-with-calculus", "video_id": "Bt0mz4mGddk", "youtube_id": "Bt0mz4mGddk", "readable_id": "first-order-reaction-with-calculus"}, "zaJVEO44_08": {"duration": 294, "path": "khan/partner-content/big-history-project/early-humans/how-did-first-humans-live/bhp-genealogy-ancestry/", "keywords": "", "id": "zaJVEO44_08", "title": "Genealogy and Human Ancestry", "description": "In this video, Henry Louis Gates, Jr., explains how three types of genetic tests helped him understand his own family history, and then goes on to explain how these same tests can help scholars reconstruct the past 60,000 years of human migration.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zaJVEO44_08.mp4/zaJVEO44_08.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zaJVEO44_08.mp4/zaJVEO44_08.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zaJVEO44_08.m3u8/zaJVEO44_08.m3u8"}, "slug": "bhp-genealogy-ancestry", "video_id": "zaJVEO44_08", "youtube_id": "zaJVEO44_08", "readable_id": "bhp-genealogy-ancestry"}, "dmcVzFbXMCU": {"duration": 94, "path": "khan/math/pre-algebra/rates-and-ratios/ratios_and_proportions/solving-ratio-problems-with-tables-exercise-3/", "keywords": "", "id": "dmcVzFbXMCU", "title": "Solving ratio problems with graph", "description": "In this example we'll plot points on the x and y axis to reflect the given ratios.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dmcVzFbXMCU.mp4/dmcVzFbXMCU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dmcVzFbXMCU.mp4/dmcVzFbXMCU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dmcVzFbXMCU.m3u8/dmcVzFbXMCU.m3u8"}, "slug": "solving-ratio-problems-with-tables-exercise-3", "video_id": "dmcVzFbXMCU", "youtube_id": "dmcVzFbXMCU", "readable_id": "solving-ratio-problems-with-tables-exercise-3"}, "N0Y8ia57C24": {"duration": 713, "path": "khan/math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers/exponential-form-to-find-complex-roots/", "keywords": "Exponential, form, to, find, complex, roots, real, imaginary, argument, magintude", "id": "N0Y8ia57C24", "title": "Exponential form to find complex roots", "description": "Using exponential form to find complex roots", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N0Y8ia57C24.mp4/N0Y8ia57C24.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N0Y8ia57C24.mp4/N0Y8ia57C24.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N0Y8ia57C24.m3u8/N0Y8ia57C24.m3u8"}, "slug": "exponential-form-to-find-complex-roots", "video_id": "N0Y8ia57C24", "youtube_id": "N0Y8ia57C24", "readable_id": "exponential-form-to-find-complex-roots"}, "VBuWGjV-Sis": {"duration": 518, "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-learning-motives/sscc-blended-moves2/", "keywords": "", "id": "VBuWGjV-Sis", "title": "Part 2: Tips from blended-learning teachers about the structures and systems that make blended work", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VBuWGjV-Sis.mp4/VBuWGjV-Sis.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VBuWGjV-Sis.mp4/VBuWGjV-Sis.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VBuWGjV-Sis.m3u8/VBuWGjV-Sis.m3u8"}, "slug": "sscc-blended-moves2", "video_id": "VBuWGjV-Sis", "youtube_id": "VBuWGjV-Sis", "readable_id": "sscc-blended-moves2"}, "5qfOViJda_g": {"duration": 75, "path": "khan/math/algebra-basics/core-algebra-foundations/world-of-exponents-college-readiness/understanding-exponents-2/", "keywords": "U01_L5_T1_we2, Understanding, Exponents, CC_6_EE_1", "id": "5qfOViJda_g", "title": "Exponent example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5qfOViJda_g.mp4/5qfOViJda_g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5qfOViJda_g.mp4/5qfOViJda_g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5qfOViJda_g.m3u8/5qfOViJda_g.m3u8"}, "slug": "understanding-exponents-2", "video_id": "5qfOViJda_g", "youtube_id": "5qfOViJda_g", "readable_id": "understanding-exponents-2"}, "72p6uw5y-Rw": {"duration": 359, "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/is-lm-model-tutorial/investment-and-real-interest-rates/", "keywords": "macroeconomics", "id": "72p6uw5y-Rw", "title": "Investment and real interest rates", "description": "Intuition as to why high real interest rates lead to low investment and why low rates lead to high investment", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/72p6uw5y-Rw.mp4/72p6uw5y-Rw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/72p6uw5y-Rw.mp4/72p6uw5y-Rw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/72p6uw5y-Rw.m3u8/72p6uw5y-Rw.m3u8"}, "slug": "investment-and-real-interest-rates", "video_id": "72p6uw5y-Rw", "youtube_id": "72p6uw5y-Rw", "readable_id": "investment-and-real-interest-rates"}, "-EG10aI0rt0": {"duration": 248, "path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/implicit-derivative-of-y-cos-5x-3y/", "keywords": "", "id": "-EG10aI0rt0", "title": "Implicit derivative of y = cos(5x - 3y)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-EG10aI0rt0.mp4/-EG10aI0rt0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-EG10aI0rt0.mp4/-EG10aI0rt0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-EG10aI0rt0.m3u8/-EG10aI0rt0.m3u8"}, "slug": "implicit-derivative-of-y-cos-5x-3y", "video_id": "-EG10aI0rt0", "youtube_id": "-EG10aI0rt0", "readable_id": "implicit-derivative-of-y-cos-5x-3y"}, "b269qpILOpk": {"duration": 545, "path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-alg-projection-is-closest-vector-in-subspace/", "keywords": "projection, subspace", "id": "b269qpILOpk", "title": "Projection is closest vector in subspace", "description": "Showing that the projection of x onto a subspace is the closest vector in the subspace to x", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b269qpILOpk.mp4/b269qpILOpk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b269qpILOpk.mp4/b269qpILOpk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b269qpILOpk.m3u8/b269qpILOpk.m3u8"}, "slug": "linear-alg-projection-is-closest-vector-in-subspace", "video_id": "b269qpILOpk", "youtube_id": "b269qpILOpk", "readable_id": "linear-alg-projection-is-closest-vector-in-subspace"}, "87QlGDfXh54": {"duration": 252, "path": "khan/humanities/art-asia/imperial-china/ming-dynasty/gardens-suzhou/", "keywords": "", "id": "87QlGDfXh54", "title": "Classical gardens of Suzhou", "description": "This video explores the classical gardens of Suzhou, which are considered to be some of the most beautiful gardens in China. Learn more about China on the Asian Art Museum's education website.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/87QlGDfXh54.mp4/87QlGDfXh54.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/87QlGDfXh54.mp4/87QlGDfXh54.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/87QlGDfXh54.m3u8/87QlGDfXh54.m3u8"}, "slug": "gardens-suzhou", "video_id": "87QlGDfXh54", "youtube_id": "87QlGDfXh54", "readable_id": "gardens-suzhou"}, "anlOhNHlqwg": {"duration": 179, "path": "khan/math/arithmetic/multiplication-division/advanced-mult-div-word-problems/multi-step-word-problems-with-whole-numbers-exercise-1/", "keywords": "", "id": "anlOhNHlqwg", "title": "Multiplication, division word problems: how many field goals?", "description": "It's time to start putting to practice the multiplication and division skills you've been building. Word problem fun!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/anlOhNHlqwg.mp4/anlOhNHlqwg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/anlOhNHlqwg.mp4/anlOhNHlqwg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/anlOhNHlqwg.m3u8/anlOhNHlqwg.m3u8"}, "slug": "multi-step-word-problems-with-whole-numbers-exercise-1", "video_id": "anlOhNHlqwg", "youtube_id": "anlOhNHlqwg", "readable_id": "multi-step-word-problems-with-whole-numbers-exercise-1"}, "Za7G_eWKiF4": {"duration": 159, "path": "khan/math/precalculus/prob_comb/dependent_events_precalc/independent-events-1/", "keywords": "U12_L2_T2_we1, Independent, Events", "id": "Za7G_eWKiF4", "title": "Independent or dependent probability event?", "description": "This time around we're not going to tell you whether we're working on a dependent or independent probability event problem. You tell us!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Za7G_eWKiF4.mp4/Za7G_eWKiF4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Za7G_eWKiF4.mp4/Za7G_eWKiF4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Za7G_eWKiF4.m3u8/Za7G_eWKiF4.m3u8"}, "slug": "independent-events-1", "video_id": "Za7G_eWKiF4", "youtube_id": "Za7G_eWKiF4", "readable_id": "independent-events-1"}, "gqMqYYcJgz4": {"duration": 301, "path": "khan/test-prep/mcat/biomolecules/dna-technology/applications-of-dna-technologies/", "keywords": "", "id": "gqMqYYcJgz4", "title": "Applications of DNA technologies", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gqMqYYcJgz4.mp4/gqMqYYcJgz4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gqMqYYcJgz4.mp4/gqMqYYcJgz4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gqMqYYcJgz4.m3u8/gqMqYYcJgz4.m3u8"}, "slug": "applications-of-dna-technologies", "video_id": "gqMqYYcJgz4", "youtube_id": "gqMqYYcJgz4", "readable_id": "applications-of-dna-technologies"}, "OCYZTg3jahU": {"duration": 148, "path": "khan/math/recreational-math/vi-hart/singing/binary-hand-dance/", "keywords": "mathematics, pi, binary", "id": "OCYZTg3jahU", "title": "Binary hand dance", "description": "Thanks to my bro for the music! He's at christopherhart2010@gmail.com\n\nThanks to my other bro for hand dancin' and throwing money at me, and special thanks to my mamma and grandma for their guest appearances.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OCYZTg3jahU.mp4/OCYZTg3jahU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OCYZTg3jahU.mp4/OCYZTg3jahU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OCYZTg3jahU.m3u8/OCYZTg3jahU.m3u8"}, "slug": "binary-hand-dance", "video_id": "OCYZTg3jahU", "youtube_id": "OCYZTg3jahU", "readable_id": "binary-hand-dance"}, "FcyYynulogY": {"duration": 116, "path": "khan/humanities/global-culture/conceptual-performance/moma-abramovic-what-is-performance-art/", "keywords": "", "id": "FcyYynulogY", "title": "Marina Abramovi\u0107: What is performance art?", "description": "Marina Abramovi\u0107 talks about the difference between theatre and performance art, \"performance is real.\" To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FcyYynulogY.mp4/FcyYynulogY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FcyYynulogY.mp4/FcyYynulogY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FcyYynulogY.m3u8/FcyYynulogY.m3u8"}, "slug": "moma-abramovic-what-is-performance-art", "video_id": "FcyYynulogY", "youtube_id": "FcyYynulogY", "readable_id": "moma-abramovic-what-is-performance-art"}, "bjVn4WGmNis": {"duration": 179, "path": "khan/math/pre-algebra/order-of-operations/arithmetic_properties/inverse-property-of-addition/", "keywords": "additive, inverse, property", "id": "bjVn4WGmNis", "title": "Inverse property of addition", "description": "The simple idea that a number plus its negative is 0", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bjVn4WGmNis.mp4/bjVn4WGmNis.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bjVn4WGmNis.mp4/bjVn4WGmNis.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bjVn4WGmNis.m3u8/bjVn4WGmNis.m3u8"}, "slug": "inverse-property-of-addition", "video_id": "bjVn4WGmNis", "youtube_id": "bjVn4WGmNis", "readable_id": "inverse-property-of-addition"}, "RQPC_rUvHas": {"duration": 319, "path": "khan/math/probability/statistical-studies/types-of-studies/analyzing-statistical-study/", "keywords": "", "id": "RQPC_rUvHas", "title": "Appropriate statistical study example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RQPC_rUvHas.mp4/RQPC_rUvHas.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RQPC_rUvHas.mp4/RQPC_rUvHas.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RQPC_rUvHas.m3u8/RQPC_rUvHas.m3u8"}, "slug": "analyzing-statistical-study", "video_id": "RQPC_rUvHas", "youtube_id": "RQPC_rUvHas", "readable_id": "analyzing-statistical-study"}, "PErhLkQcpZ8": {"duration": 1052, "path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/linear-transformations-as-matrix-vector-products/", "keywords": "linear, transformation, algebra, matrix", "id": "PErhLkQcpZ8", "title": "Linear transformations as matrix vector products", "description": "Showing how ANY linear transformation can be represented as a matrix vector product", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PErhLkQcpZ8.mp4/PErhLkQcpZ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PErhLkQcpZ8.mp4/PErhLkQcpZ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PErhLkQcpZ8.m3u8/PErhLkQcpZ8.m3u8"}, "slug": "linear-transformations-as-matrix-vector-products", "video_id": "PErhLkQcpZ8", "youtube_id": "PErhLkQcpZ8", "readable_id": "linear-transformations-as-matrix-vector-products"}, "taTxFgtb1_Q": {"duration": 210, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/giles-shih/kauffman-giles-shih-2/", "keywords": "", "id": "taTxFgtb1_Q", "title": "Giles Shih - The importance of education", "description": "Giles Shih, President and CEO of BioResource International, talks about how his education contributed to the growth of his business. Giles also discusses three key elements of starting your business as well as the significance to problem solving and being motivated by a cause important to you.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/taTxFgtb1_Q.mp4/taTxFgtb1_Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/taTxFgtb1_Q.mp4/taTxFgtb1_Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/taTxFgtb1_Q.m3u8/taTxFgtb1_Q.m3u8"}, "slug": "kauffman-giles-shih-2", "video_id": "taTxFgtb1_Q", "youtube_id": "taTxFgtb1_Q", "readable_id": "kauffman-giles-shih-2"}, "a3XcYsXQYaM": {"duration": 276, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/hypertension-and-blood-vessel-damage/", "keywords": "Blood (Biofluid),Hypertension (Disease Or Medical Condition),Health (Industry)", "id": "a3XcYsXQYaM", "title": "Hypertension and blood vessel damage", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a3XcYsXQYaM.mp4/a3XcYsXQYaM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a3XcYsXQYaM.mp4/a3XcYsXQYaM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a3XcYsXQYaM.m3u8/a3XcYsXQYaM.m3u8"}, "slug": "hypertension-and-blood-vessel-damage", "video_id": "a3XcYsXQYaM", "youtube_id": "a3XcYsXQYaM", "readable_id": "hypertension-and-blood-vessel-damage"}, "3UAJS9jzyV4": {"duration": 221, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-salmonella-poisoning/", "keywords": "Salmonella (Disease Cause),Health (Industry)", "id": "3UAJS9jzyV4", "title": "What is salmonella poisoning?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3UAJS9jzyV4.mp4/3UAJS9jzyV4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3UAJS9jzyV4.mp4/3UAJS9jzyV4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3UAJS9jzyV4.m3u8/3UAJS9jzyV4.m3u8"}, "slug": "what-is-salmonella-poisoning", "video_id": "3UAJS9jzyV4", "youtube_id": "3UAJS9jzyV4", "readable_id": "what-is-salmonella-poisoning"}, "4vNloi-zNjU": {"duration": 141, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/graphing-points-exercise/", "keywords": "", "id": "4vNloi-zNjU", "title": "Coordinate plane: graphing points", "description": "This exercise asks us to graph a set of points from an ordered pair on the x and y axis of a coordinate plane.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4vNloi-zNjU.mp4/4vNloi-zNjU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4vNloi-zNjU.mp4/4vNloi-zNjU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4vNloi-zNjU.m3u8/4vNloi-zNjU.m3u8"}, "slug": "graphing-points-exercise", "video_id": "4vNloi-zNjU", "youtube_id": "4vNloi-zNjU", "readable_id": "graphing-points-exercise"}, "RaQBaVeEbW8": {"duration": 354, "path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/biodiversity-hotspot/", "keywords": "", "id": "RaQBaVeEbW8", "title": "What is a biodiversity hotspot?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RaQBaVeEbW8.mp4/RaQBaVeEbW8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RaQBaVeEbW8.mp4/RaQBaVeEbW8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RaQBaVeEbW8.m3u8/RaQBaVeEbW8.m3u8"}, "slug": "biodiversity-hotspot", "video_id": "RaQBaVeEbW8", "youtube_id": "RaQBaVeEbW8", "readable_id": "biodiversity-hotspot"}, "YBYu5aZPLeg": {"duration": 200, "path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphing-linear-inequalities-in-two-variables-3/", "keywords": "U05_L2_T1_we3, Graphing, linear, inequalities, in, two, variables", "id": "YBYu5aZPLeg", "title": "How to find the inequality that is represented by a given graph (example)", "description": "Sal is given a graph and he analyzes it to find the underlying inequality.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YBYu5aZPLeg.mp4/YBYu5aZPLeg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YBYu5aZPLeg.mp4/YBYu5aZPLeg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YBYu5aZPLeg.m3u8/YBYu5aZPLeg.m3u8"}, "slug": "graphing-linear-inequalities-in-two-variables-3", "video_id": "YBYu5aZPLeg", "youtube_id": "YBYu5aZPLeg", "readable_id": "graphing-linear-inequalities-in-two-variables-3"}, "LWwGfQ8fBwA": {"duration": 176, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/indicating-electrolysis/electrolysis-build-experiment-hd-720p/", "keywords": "", "id": "LWwGfQ8fBwA", "title": "Do the experiment: Tools, materials, and assembly", "description": "In this video, Julie Yu of the Exploratorium Teacher Institute takes us step by step through everything you'll need to do the Indicating Electrolysis experiment yourself.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LWwGfQ8fBwA.mp4/LWwGfQ8fBwA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LWwGfQ8fBwA.mp4/LWwGfQ8fBwA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LWwGfQ8fBwA.m3u8/LWwGfQ8fBwA.m3u8"}, "slug": "electrolysis-build-experiment-hd-720p", "video_id": "LWwGfQ8fBwA", "youtube_id": "LWwGfQ8fBwA", "readable_id": "electrolysis-build-experiment-hd-720p"}, "CqsYCIjSm9A": {"duration": 590, "path": "khan/science/physics/electricity-magnetism/electric-potential-voltage/electric-potential-energy-part-2-involves-calculus/", "keywords": "electric, potential, energy", "id": "CqsYCIjSm9A", "title": "Electric potential energy (part 2-- involves calculus)", "description": "Electric potential energy difference in a varying field", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CqsYCIjSm9A.mp4/CqsYCIjSm9A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CqsYCIjSm9A.mp4/CqsYCIjSm9A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CqsYCIjSm9A.m3u8/CqsYCIjSm9A.m3u8"}, "slug": "electric-potential-energy-part-2-involves-calculus", "video_id": "CqsYCIjSm9A", "youtube_id": "CqsYCIjSm9A", "readable_id": "electric-potential-energy-part-2-involves-calculus"}, "tjQzJ7GY0GY": {"duration": 231, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/dilution-tutorial/stock-dilution/", "keywords": "finance, stock, dilution", "id": "tjQzJ7GY0GY", "title": "Stock dilution", "description": "Why the value per share does not really get diluted when more shares are issued in a secondary offering", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tjQzJ7GY0GY.mp4/tjQzJ7GY0GY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tjQzJ7GY0GY.mp4/tjQzJ7GY0GY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tjQzJ7GY0GY.m3u8/tjQzJ7GY0GY.m3u8"}, "slug": "stock-dilution", "video_id": "tjQzJ7GY0GY", "youtube_id": "tjQzJ7GY0GY", "readable_id": "stock-dilution"}, "5UVpLPtgdF4": {"duration": 702, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds/ponzi-schemes/", "keywords": "Ponzi, Schemes, marquee", "id": "5UVpLPtgdF4", "title": "Ponzi schemes", "description": "Ponzi Schemes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5UVpLPtgdF4.mp4/5UVpLPtgdF4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5UVpLPtgdF4.mp4/5UVpLPtgdF4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5UVpLPtgdF4.m3u8/5UVpLPtgdF4.m3u8"}, "slug": "ponzi-schemes", "video_id": "5UVpLPtgdF4", "youtube_id": "5UVpLPtgdF4", "readable_id": "ponzi-schemes"}, "lDY9JcFaRd4": {"duration": 473, "path": "khan/math/differential-calculus/derivative_applications/critical_points_graphing/minima-maxima-and-critical-points/", "keywords": "", "id": "lDY9JcFaRd4", "title": "Minima, maxima and critical points", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lDY9JcFaRd4.mp4/lDY9JcFaRd4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lDY9JcFaRd4.mp4/lDY9JcFaRd4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lDY9JcFaRd4.m3u8/lDY9JcFaRd4.m3u8"}, "slug": "minima-maxima-and-critical-points", "video_id": "lDY9JcFaRd4", "youtube_id": "lDY9JcFaRd4", "readable_id": "minima-maxima-and-critical-points"}, "HUZDPWLTZ0g": {"duration": 248, "path": "khan/humanities/art-1010/art-between-wars/surrealism1/dal-metamorphosis-of-narcissus-1937/", "keywords": "Salvador Dal\u00ed, Smarthistory, Art History, Surrealism", "id": "HUZDPWLTZ0g", "title": "Dali, Metamorphosis of Narcissus", "description": "Salvador Dal\u00ed, Metamorphosis of Narcissus, 1937, oil on canvas, 51.1 x 78.1 cm (Tate Modern, London) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\n\u00a0\n\nThe ancient source of this subject is Ovid's Metamorphosis (Book 3, lines 339-507) tells of Narcissus who upon seeing his own image reflected in a pool so falls in love that he could not look away, eventually he vanishes and in his place is a \"sweet flower, gold and white, the white around the gold.\"\n\nDal\u00ed's poem, below, accompanied the painting when it was initially exhibited:\n\nNarcissus,\n\nin his immobility,\n\nabsorbed by his reflection with the digestive slowness of carnivorous plants,\n\nbecomes invisible.\n\nThere remains of him only the hallucinatingly white oval of his head,\n\nhis head again more tender,\n\nhis head, chrysalis of hidden biological designs,\n\nhis head held up by the tips of the water's fingers,\n\nat the tips of the fingers\n\nof the insensate hand,\n\nof the terrible hand,\n\nof the mortal hand\n\nof his own reflection.\n\nWhen that head slits\n\nwhen that head splits\n\nwhen that head bursts,\n\nit will be the flower,\n\nthe new Narcissus,\n\nGala - my Narcissus", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HUZDPWLTZ0g.mp4/HUZDPWLTZ0g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HUZDPWLTZ0g.mp4/HUZDPWLTZ0g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HUZDPWLTZ0g.m3u8/HUZDPWLTZ0g.m3u8"}, "slug": "dal-metamorphosis-of-narcissus-1937", "video_id": "HUZDPWLTZ0g", "youtube_id": "HUZDPWLTZ0g", "readable_id": "dal-metamorphosis-of-narcissus-1937"}, "ZroXIBg8keA": {"duration": 397, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/how-hiv-infects-us-mucous-membranes-dendritic-cells-and-lymph-nodes/", "keywords": "Dendritic Cell,Lymph Node (Anatomical Structure),HIV (Disease Cause),Lymph (Biofluid),Mucous Membrane (Anatomical Structure)", "id": "ZroXIBg8keA", "title": "How HIV infects us: Mucous membranes, dendritic cells, and lymph nodes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZroXIBg8keA.mp4/ZroXIBg8keA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZroXIBg8keA.mp4/ZroXIBg8keA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZroXIBg8keA.m3u8/ZroXIBg8keA.m3u8"}, "slug": "how-hiv-infects-us-mucous-membranes-dendritic-cells-and-lymph-nodes", "video_id": "ZroXIBg8keA", "youtube_id": "ZroXIBg8keA", "readable_id": "how-hiv-infects-us-mucous-membranes-dendritic-cells-and-lymph-nodes"}, "Anab9vKI7i8": {"duration": 179, "path": "khan/humanities/art-islam/islamic-art-late-period/getting-lost/", "keywords": "authority, control, nature, ornate, painting, paper, politics, writing, Middle East", "id": "Anab9vKI7i8", "title": "Tughra (Official Signature) of Sultan S\u00fcleiman the Magnificent from Istanbul", "description": "Met curator Deniz Beyazit on the art of control in Tughra (Official Signature) of Sultan S\u00fcleiman the Magnificent from Istanbul, c. 1555\u201360.\n\nRaised to a high art form within the Ottoman chancery, the tughra served as the official seal of the sultan. Affixed to every royal edict, this stylized signature is an intricate calligraphic composition comprising the name of the reigning sultan, his father\u2019s name, his title, and the phrase \"the eternally victorious.\" Its bold, gestural line contrasts with the delicate swirling vine-scroll illumination used to ornament the seal.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit Find an Educator Resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Anab9vKI7i8.mp4/Anab9vKI7i8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Anab9vKI7i8.mp4/Anab9vKI7i8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Anab9vKI7i8.m3u8/Anab9vKI7i8.m3u8"}, "slug": "getting-lost", "video_id": "Anab9vKI7i8", "youtube_id": "Anab9vKI7i8", "readable_id": "getting-lost"}, "zAx61CO5mDw": {"duration": 564, "path": "khan/science/physics/torque-angular-momentum/torque-tutorial/relationship-between-angular-velocity-and-speed/", "keywords": "Relationship, between, angular, velocity, and, speed", "id": "zAx61CO5mDw", "title": "Relationship between angular velocity and speed", "description": "How angular velocity relates to speed", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zAx61CO5mDw.mp4/zAx61CO5mDw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zAx61CO5mDw.mp4/zAx61CO5mDw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zAx61CO5mDw.m3u8/zAx61CO5mDw.m3u8"}, "slug": "relationship-between-angular-velocity-and-speed", "video_id": "zAx61CO5mDw", "youtube_id": "zAx61CO5mDw", "readable_id": "relationship-between-angular-velocity-and-speed"}, "9gnM72T4DTE": {"duration": 289, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/william-holman-hunt-the-awakening-conscience-1853/", "keywords": "Hunt, Awakening, London, GAP, William Holman Hunt, Awakening Conscience, 1853, Tate Britain, Khan Academy, smarthistory, art history, Google Art Project, OER, painting, morality", "id": "9gnM72T4DTE", "title": "Hunt, the Awakening Conscience", "description": "William Holman Hunt, The Awakening Conscience, 1853, oil on canvas, 762 x 559 mm (Tate Britain, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9gnM72T4DTE.mp4/9gnM72T4DTE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9gnM72T4DTE.mp4/9gnM72T4DTE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9gnM72T4DTE.m3u8/9gnM72T4DTE.m3u8"}, "slug": "william-holman-hunt-the-awakening-conscience-1853", "video_id": "9gnM72T4DTE", "youtube_id": "9gnM72T4DTE", "readable_id": "william-holman-hunt-the-awakening-conscience-1853"}, "SZUDoEdjTzg": {"duration": 387, "path": "khan/math/algebra2/logarithms-tutorial/logarithmic-scale-patterns/benford-s-law-explanation-sequel-to-mysteries-of-benford-s-law/", "keywords": "math, mysteries", "id": "SZUDoEdjTzg", "title": "Benford's law explanation (sequel to mysteries of Benford's law)", "description": "Vi and Sal talk through the intuition of Benford's law (part 2)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SZUDoEdjTzg.mp4/SZUDoEdjTzg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SZUDoEdjTzg.mp4/SZUDoEdjTzg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SZUDoEdjTzg.m3u8/SZUDoEdjTzg.m3u8"}, "slug": "benford-s-law-explanation-sequel-to-mysteries-of-benford-s-law", "video_id": "SZUDoEdjTzg", "youtube_id": "SZUDoEdjTzg", "readable_id": "benford-s-law-explanation-sequel-to-mysteries-of-benford-s-law"}, "7unYHC6YrMs": {"duration": 162, "path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/stare/", "keywords": "", "id": "7unYHC6YrMs", "title": "Evans, Subway Passengers, New York City", "description": "Met curator Jeff Rosenheim on the art of seeing in Walker Evans\u2019s [Subway Passengers, New York City], 1938.\n\nView this work on\u00a0metmuseum.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7unYHC6YrMs.mp4/7unYHC6YrMs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7unYHC6YrMs.mp4/7unYHC6YrMs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7unYHC6YrMs.m3u8/7unYHC6YrMs.m3u8"}, "slug": "stare", "video_id": "7unYHC6YrMs", "youtube_id": "7unYHC6YrMs", "readable_id": "stare"}, "ZcaPndok1hc": {"duration": 130, "path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/turbulence-at-high-velocities-and-reynolds-number/", "keywords": "", "id": "ZcaPndok1hc", "title": "Turbulence at high velocities and Reynold's number", "description": "In this video David explains how the Reynold's number allows you to determine the speed at which fluid flow becomes turbulent.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZcaPndok1hc.mp4/ZcaPndok1hc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZcaPndok1hc.mp4/ZcaPndok1hc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZcaPndok1hc.m3u8/ZcaPndok1hc.m3u8"}, "slug": "turbulence-at-high-velocities-and-reynolds-number", "video_id": "ZcaPndok1hc", "youtube_id": "ZcaPndok1hc", "readable_id": "turbulence-at-high-velocities-and-reynolds-number"}, "Gwjlw3K2OrQ": {"duration": 288, "path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-loopblock/", "keywords": "", "id": "Gwjlw3K2OrQ", "title": "Loop block", "description": "Loop block allows us to repeat\u00a0behaviours", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Gwjlw3K2OrQ.mp4/Gwjlw3K2OrQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Gwjlw3K2OrQ.mp4/Gwjlw3K2OrQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Gwjlw3K2OrQ.m3u8/Gwjlw3K2OrQ.m3u8"}, "slug": "lego-loopblock", "video_id": "Gwjlw3K2OrQ", "youtube_id": "Gwjlw3K2OrQ", "readable_id": "lego-loopblock"}, "9VqL6POWIoc": {"duration": 162, "path": "khan/math/integral-calculus/indefinite-definite-integrals/improper-integrals-tutorial/divergent-improper-integral/", "keywords": "", "id": "9VqL6POWIoc", "title": "Divergent improper integral", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9VqL6POWIoc.mp4/9VqL6POWIoc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9VqL6POWIoc.mp4/9VqL6POWIoc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9VqL6POWIoc.m3u8/9VqL6POWIoc.m3u8"}, "slug": "divergent-improper-integral", "video_id": "9VqL6POWIoc", "youtube_id": "9VqL6POWIoc", "readable_id": "divergent-improper-integral"}, "oT9NdKpUwdU": {"duration": 344, "path": "khan/humanities/art-americas/south-america-early/inca-art/inca-ushnus/", "keywords": "Inca, British Museum", "id": "oT9NdKpUwdU", "title": "Inka ushnus: landscape, site and symbol in the Andes", "description": "For three years, a research team from the British Museum, the University of Reading, Royal Holloway University of London and the Universidad Nacional de San Cristobal de Huamanga set out to discover how the Inca Empire used a stone platform known as an ushnu as a symbol of political power.\nBy enhancing our knowledge of how ushnus were built, their symbolism, what activities took place on them and what artifacts might be found around them, the project has increased our understanding of Inca culture and how they conquered the Andes to become one of the world\u2019s most successful civilisations. \u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oT9NdKpUwdU.mp4/oT9NdKpUwdU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oT9NdKpUwdU.mp4/oT9NdKpUwdU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oT9NdKpUwdU.m3u8/oT9NdKpUwdU.m3u8"}, "slug": "inca-ushnus", "video_id": "oT9NdKpUwdU", "youtube_id": "oT9NdKpUwdU", "readable_id": "inca-ushnus"}, "qmsWOrQtj4w": {"duration": 301, "path": "khan/test-prep/mcat/cells/viruses/subviral-particles-viroids-and-prions/", "keywords": "", "id": "qmsWOrQtj4w", "title": "Subviral particles: viroids and prions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qmsWOrQtj4w.mp4/qmsWOrQtj4w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qmsWOrQtj4w.mp4/qmsWOrQtj4w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qmsWOrQtj4w.m3u8/qmsWOrQtj4w.m3u8"}, "slug": "subviral-particles-viroids-and-prions", "video_id": "qmsWOrQtj4w", "youtube_id": "qmsWOrQtj4w", "readable_id": "subviral-particles-viroids-and-prions"}, "lBscLuttQq0": {"duration": 93, "path": "khan/math/algebra-basics/core-algebra-foundations/core-algebra-foundations-negative-numbers/why-subtracting-a-negative-equivalent-to-adding-a-positive/", "keywords": "", "id": "lBscLuttQq0", "title": "Subtracting a negative = adding a positive", "description": "Find out why subtracting a negative number is the same as adding the absolute value of that number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lBscLuttQq0.mp4/lBscLuttQq0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lBscLuttQq0.mp4/lBscLuttQq0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lBscLuttQq0.m3u8/lBscLuttQq0.m3u8"}, "slug": "why-subtracting-a-negative-equivalent-to-adding-a-positive", "video_id": "lBscLuttQq0", "youtube_id": "lBscLuttQq0", "readable_id": "why-subtracting-a-negative-equivalent-to-adding-a-positive"}, "3858MaULDdI": {"duration": 473, "path": "khan/science/health-and-medicine/healthcare-misc/stenosis-ischemia-and-heart-failure/", "keywords": "heart, coronary, disease, myocardial, infarction", "id": "3858MaULDdI", "title": "Stenosis, ischemia and heart failure", "description": "Clarifying a bunch of medical terms around heart disease", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3858MaULDdI.mp4/3858MaULDdI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3858MaULDdI.mp4/3858MaULDdI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3858MaULDdI.m3u8/3858MaULDdI.m3u8"}, "slug": "stenosis-ischemia-and-heart-failure", "video_id": "3858MaULDdI", "youtube_id": "3858MaULDdI", "readable_id": "stenosis-ischemia-and-heart-failure"}, "zWcfVC-oCNw": {"duration": 475, "path": "khan/math/pre-algebra/factors-multiples/prime_factorization/common-divisibility-examples/", "keywords": "divisibility, prime, factorization", "id": "zWcfVC-oCNw", "title": "Common divisibility examples", "description": "Common Divisibility Examples", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zWcfVC-oCNw.mp4/zWcfVC-oCNw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zWcfVC-oCNw.mp4/zWcfVC-oCNw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zWcfVC-oCNw.m3u8/zWcfVC-oCNw.m3u8"}, "slug": "common-divisibility-examples", "video_id": "zWcfVC-oCNw", "youtube_id": "zWcfVC-oCNw", "readable_id": "common-divisibility-examples"}, "OlYwHNKN-qw": {"duration": 246, "path": "khan/science/discoveries-projects/robots/all-about-spout/spout-bot-at-santa-rita-elementary-school/", "keywords": "", "id": "OlYwHNKN-qw", "title": "3rd graders build robots at Santa Rita Elementary School", "description": "Mrs. Rowhani's third graders learn about matter and energy by building a Spout bot with Khan Academy. \n\nSpecial thanks to: Santa Rita's volunteer parents, Kami Thordarson, Karen Wilson and of course Laleh Rowhani the class teacher.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OlYwHNKN-qw.mp4/OlYwHNKN-qw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OlYwHNKN-qw.mp4/OlYwHNKN-qw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OlYwHNKN-qw.m3u8/OlYwHNKN-qw.m3u8"}, "slug": "spout-bot-at-santa-rita-elementary-school", "video_id": "OlYwHNKN-qw", "youtube_id": "OlYwHNKN-qw", "readable_id": "spout-bot-at-santa-rita-elementary-school"}, "A1XyF5clLbI": {"duration": 447, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-chronic-bronchitis/rn-chronic-bronchitis-pathophysiology/", "keywords": "", "id": "A1XyF5clLbI", "title": "Chronic bronchitis pathophysiology", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A1XyF5clLbI.mp4/A1XyF5clLbI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A1XyF5clLbI.mp4/A1XyF5clLbI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A1XyF5clLbI.m3u8/A1XyF5clLbI.m3u8"}, "slug": "rn-chronic-bronchitis-pathophysiology", "video_id": "A1XyF5clLbI", "youtube_id": "A1XyF5clLbI", "readable_id": "rn-chronic-bronchitis-pathophysiology"}, "nL-NSia0HiA": {"duration": 760, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-8/", "keywords": "gmat, data, sufficiency, math", "id": "nL-NSia0HiA", "title": "GMAT: Data sufficiency 8", "description": "37-41, pgs. 280-281", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nL-NSia0HiA.mp4/nL-NSia0HiA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nL-NSia0HiA.mp4/nL-NSia0HiA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nL-NSia0HiA.m3u8/nL-NSia0HiA.m3u8"}, "slug": "gmat-data-sufficiency-8", "video_id": "nL-NSia0HiA", "youtube_id": "nL-NSia0HiA", "readable_id": "gmat-data-sufficiency-8"}, "Hbuh5m3p0x0": {"duration": 417, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/bohr-model-radii/", "keywords": "", "id": "Hbuh5m3p0x0", "title": "Bohr model radii", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hbuh5m3p0x0.mp4/Hbuh5m3p0x0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hbuh5m3p0x0.mp4/Hbuh5m3p0x0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hbuh5m3p0x0.m3u8/Hbuh5m3p0x0.m3u8"}, "slug": "bohr-model-radii", "video_id": "Hbuh5m3p0x0", "youtube_id": "Hbuh5m3p0x0", "readable_id": "bohr-model-radii"}, "EtefJ85R1OQ": {"duration": 337, "path": "khan/math/algebra2/exponential_and_logarithmic_func/exponential-modeling/modeling-ticket-fines-with-exponential-function/", "keywords": "", "id": "EtefJ85R1OQ", "title": "How to model a real-world context with a basic exponential function (example)", "description": "Sal solves a word problem where he models the growth of a speeding ticket fine over time as an exponential function, and then interprets this model.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EtefJ85R1OQ.mp4/EtefJ85R1OQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EtefJ85R1OQ.mp4/EtefJ85R1OQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EtefJ85R1OQ.m3u8/EtefJ85R1OQ.m3u8"}, "slug": "modeling-ticket-fines-with-exponential-function", "video_id": "EtefJ85R1OQ", "youtube_id": "EtefJ85R1OQ", "readable_id": "modeling-ticket-fines-with-exponential-function"}, "dh__n9FVKA0": {"duration": 232, "path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/deriving-integration-by-parts-formula/", "keywords": "", "id": "dh__n9FVKA0", "title": "Deriving integration by parts formula", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dh__n9FVKA0.mp4/dh__n9FVKA0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dh__n9FVKA0.mp4/dh__n9FVKA0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dh__n9FVKA0.m3u8/dh__n9FVKA0.m3u8"}, "slug": "deriving-integration-by-parts-formula", "video_id": "dh__n9FVKA0", "youtube_id": "dh__n9FVKA0", "readable_id": "deriving-integration-by-parts-formula"}, "w616LEmrHVE": {"duration": 165, "path": "khan/math/pre-algebra/decimals-pre-alg/adding-decimals-pre-alg/adding-decimals/", "keywords": "U03_L2_T1_we1, Adding, Decimals", "id": "w616LEmrHVE", "title": "Adding decimals: example 3", "description": "We're adding 3 decimal numbers together in this example. Give it a try!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w616LEmrHVE.mp4/w616LEmrHVE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w616LEmrHVE.mp4/w616LEmrHVE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w616LEmrHVE.m3u8/w616LEmrHVE.m3u8"}, "slug": "adding-decimals", "video_id": "w616LEmrHVE", "youtube_id": "w616LEmrHVE", "readable_id": "adding-decimals"}, "5xe-6GPR_qQ": {"duration": 240, "path": "khan/math/pre-algebra/factors-multiples/divisibility_and_factors/finding-factors-and-multiples/", "keywords": "", "id": "5xe-6GPR_qQ", "title": "Finding factors and multiples", "description": "Watch and listen as we explain a simple way of remembering the difference between factors and multiples.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5xe-6GPR_qQ.mp4/5xe-6GPR_qQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5xe-6GPR_qQ.mp4/5xe-6GPR_qQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5xe-6GPR_qQ.m3u8/5xe-6GPR_qQ.m3u8"}, "slug": "finding-factors-and-multiples", "video_id": "5xe-6GPR_qQ", "youtube_id": "5xe-6GPR_qQ", "readable_id": "finding-factors-and-multiples"}, "4_410pxikS0": {"duration": 582, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/microcytic-anemia/", "keywords": "", "id": "4_410pxikS0", "title": "Microcytic anemia", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4_410pxikS0.mp4/4_410pxikS0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4_410pxikS0.mp4/4_410pxikS0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4_410pxikS0.m3u8/4_410pxikS0.m3u8"}, "slug": "microcytic-anemia", "video_id": "4_410pxikS0", "youtube_id": "4_410pxikS0", "readable_id": "microcytic-anemia"}, "Z9b8nnvpim0": {"duration": 289, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/gdp-components-tutorial/income-and-expenditure-views-of-gdp/", "keywords": "macroeconomics, Gross Domestic Product", "id": "Z9b8nnvpim0", "title": "Income and expenditure views of GDP", "description": "Looking at a simple model of an economy", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z9b8nnvpim0.mp4/Z9b8nnvpim0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z9b8nnvpim0.mp4/Z9b8nnvpim0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z9b8nnvpim0.m3u8/Z9b8nnvpim0.m3u8"}, "slug": "income-and-expenditure-views-of-gdp", "video_id": "Z9b8nnvpim0", "youtube_id": "Z9b8nnvpim0", "readable_id": "income-and-expenditure-views-of-gdp"}, "_M_zc7DDZbU": {"duration": 456, "path": "khan/humanities/art-asia/art-japan/muromachi-period/negoro-ware-ewer/", "keywords": "Negoro-ware, ewer, Negoro, workshop, Muromachi, 16th-century, lacquer, Wakayama, Japan, Portland Art Museum, Japanese", "id": "_M_zc7DDZbU", "title": "Muromachi to Momoyama period Negoro ware ewer", "description": "Negoro ware ewer, Negoro workshop, Muromachi period (1392-1573) to Momoyama period (1573-1615) second half of 16th century, lacquered wood, Wakayama prefecture, Japan (Portland Art Museum)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_M_zc7DDZbU.mp4/_M_zc7DDZbU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_M_zc7DDZbU.mp4/_M_zc7DDZbU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_M_zc7DDZbU.m3u8/_M_zc7DDZbU.m3u8"}, "slug": "negoro-ware-ewer", "video_id": "_M_zc7DDZbU", "youtube_id": "_M_zc7DDZbU", "readable_id": "negoro-ware-ewer"}, "bhSnU9zmai4": {"duration": 153, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p3-harder/", "keywords": "", "id": "bhSnU9zmai4", "title": "Radicals and rational exponents \u2014 Harder example", "description": "Watch Sal work through a harder Radicals and rational exponents problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bhSnU9zmai4.mp4/bhSnU9zmai4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bhSnU9zmai4.mp4/bhSnU9zmai4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bhSnU9zmai4.m3u8/bhSnU9zmai4.m3u8"}, "slug": "sat-math-p3-harder", "video_id": "bhSnU9zmai4", "youtube_id": "bhSnU9zmai4", "readable_id": "sat-math-p3-harder"}, "3ZGmMTNyW0k": {"duration": 223, "path": "khan/humanities/becoming-modern/avant-garde-france/avant-garde-sculpture/jean-baptiste-carpeaux-dance-1865-69/", "keywords": "Carpeaux, Dance, Opera House, Paris, Musee d'Orsay, Art History, Smarthistory", "id": "3ZGmMTNyW0k", "title": "Carpeaux, Dance", "description": "Jean-Baptiste Carpeaux\u200b, Dance, 1865-69, marble, 420 x 298 cm.\n(Mus\u00e9e d'Orsay, Paris).\n\nCommissioned by Charles Garnier for the facade of L'Op\u00e9ra. In 1964 it was replaced by a copy executed by Paul Belmondo.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3ZGmMTNyW0k.mp4/3ZGmMTNyW0k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3ZGmMTNyW0k.mp4/3ZGmMTNyW0k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3ZGmMTNyW0k.m3u8/3ZGmMTNyW0k.m3u8"}, "slug": "jean-baptiste-carpeaux-dance-1865-69", "video_id": "3ZGmMTNyW0k", "youtube_id": "3ZGmMTNyW0k", "readable_id": "jean-baptiste-carpeaux-dance-1865-69"}, "ZZQzMeFoZY0": {"duration": 378, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/gray-and-white-matter/", "keywords": "MCAT", "id": "ZZQzMeFoZY0", "title": "Gray and white matter", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZZQzMeFoZY0.mp4/ZZQzMeFoZY0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZZQzMeFoZY0.mp4/ZZQzMeFoZY0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZZQzMeFoZY0.m3u8/ZZQzMeFoZY0.m3u8"}, "slug": "gray-and-white-matter", "video_id": "ZZQzMeFoZY0", "youtube_id": "ZZQzMeFoZY0", "readable_id": "gray-and-white-matter"}, "QR9K8M4u8rk": {"duration": 667, "path": "khan/test-prep/gmat/problem-solving/gmat-math-24/", "keywords": "GMAT, Math, problem, solving", "id": "QR9K8M4u8rk", "title": "GMAT: Math 24", "description": "124-128, pgs. 168-169", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QR9K8M4u8rk.mp4/QR9K8M4u8rk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QR9K8M4u8rk.mp4/QR9K8M4u8rk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QR9K8M4u8rk.m3u8/QR9K8M4u8rk.m3u8"}, "slug": "gmat-math-24", "video_id": "QR9K8M4u8rk", "youtube_id": "QR9K8M4u8rk", "readable_id": "gmat-math-24"}, "cwClnv9Y1Y0": {"duration": 783, "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/labor-marginal-product-rev/a-firm-s-marginal-product-revenue-curve/", "keywords": "microecnomic, MPR, MPL, TP", "id": "cwClnv9Y1Y0", "title": "A firm's marginal product revenue curve", "description": "Thinking about how much incremental benefit a firm gets from hiring one more person", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cwClnv9Y1Y0.mp4/cwClnv9Y1Y0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cwClnv9Y1Y0.mp4/cwClnv9Y1Y0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cwClnv9Y1Y0.m3u8/cwClnv9Y1Y0.m3u8"}, "slug": "a-firm-s-marginal-product-revenue-curve", "video_id": "cwClnv9Y1Y0", "youtube_id": "cwClnv9Y1Y0", "readable_id": "a-firm-s-marginal-product-revenue-curve"}, "e_tE84565Co": {"duration": 316, "path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-structure-of-society-age/", "keywords": "", "id": "e_tE84565Co", "title": "Demographic structure of society - age", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e_tE84565Co.mp4/e_tE84565Co.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e_tE84565Co.mp4/e_tE84565Co.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e_tE84565Co.m3u8/e_tE84565Co.m3u8"}, "slug": "demographic-structure-of-society-age", "video_id": "e_tE84565Co", "youtube_id": "e_tE84565Co", "readable_id": "demographic-structure-of-society-age"}, "C5Lbjbyr1t4": {"duration": 520, "path": "khan/math/integral-calculus/integration-techniques/u_substitution/2-ln-x-x-antiderivative-example/", "keywords": "integral, antiderivative, lnx", "id": "C5Lbjbyr1t4", "title": "(2^(ln x))/x antiderivative example", "description": "Finding \u00a0\u222b(2^ln x)/x dx", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C5Lbjbyr1t4.mp4/C5Lbjbyr1t4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C5Lbjbyr1t4.mp4/C5Lbjbyr1t4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C5Lbjbyr1t4.m3u8/C5Lbjbyr1t4.m3u8"}, "slug": "2-ln-x-x-antiderivative-example", "video_id": "C5Lbjbyr1t4", "youtube_id": "C5Lbjbyr1t4", "readable_id": "2-ln-x-x-antiderivative-example"}, "1wnIsgUivEQ": {"duration": 212, "path": "khan/math/precalculus/seq_induction/proof_by_induction/alternate-proof-to-induction-for-integer-sum/", "keywords": "proof, algebra, sum, sequence, series", "id": "1wnIsgUivEQ", "title": "Alternate proof to induction for integer sum", "description": "Another way to prove the expression for the sum of all positive integers up to and including n", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1wnIsgUivEQ.mp4/1wnIsgUivEQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1wnIsgUivEQ.mp4/1wnIsgUivEQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1wnIsgUivEQ.m3u8/1wnIsgUivEQ.m3u8"}, "slug": "alternate-proof-to-induction-for-integer-sum", "video_id": "1wnIsgUivEQ", "youtube_id": "1wnIsgUivEQ", "readable_id": "alternate-proof-to-induction-for-integer-sum"}, "kMHFY6ZrKbU": {"duration": 196, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-strategies-for-adding-within-100/example-exercises-on-ways-to-add-two-digit-numbers/", "keywords": "education,online learning,learning,lessons", "id": "kMHFY6ZrKbU", "title": "Example exercises on ways to add two-digit numbers", "description": "A bunch of examples from the Khan Academy exercises to get comfortable with different ways of adding numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kMHFY6ZrKbU.mp4/kMHFY6ZrKbU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kMHFY6ZrKbU.mp4/kMHFY6ZrKbU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kMHFY6ZrKbU.m3u8/kMHFY6ZrKbU.m3u8"}, "slug": "example-exercises-on-ways-to-add-two-digit-numbers", "video_id": "kMHFY6ZrKbU", "youtube_id": "kMHFY6ZrKbU", "readable_id": "example-exercises-on-ways-to-add-two-digit-numbers"}, "QjJT87nY1WI": {"duration": 362, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/blood-brain-barrier-and-vasogenic-edema/", "keywords": "", "id": "QjJT87nY1WI", "title": "Blood brain barrier and vasogenic edema", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QjJT87nY1WI.mp4/QjJT87nY1WI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QjJT87nY1WI.mp4/QjJT87nY1WI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QjJT87nY1WI.m3u8/QjJT87nY1WI.m3u8"}, "slug": "blood-brain-barrier-and-vasogenic-edema", "video_id": "QjJT87nY1WI", "youtube_id": "QjJT87nY1WI", "readable_id": "blood-brain-barrier-and-vasogenic-edema"}, "MC7l96tW8V8": {"duration": 932, "path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-algebra-least-squares-approximation/", "keywords": "least, squares, approximation, solution", "id": "MC7l96tW8V8", "title": "Least squares approximation", "description": "The least squares approximation for otherwise unsolvable equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MC7l96tW8V8.mp4/MC7l96tW8V8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MC7l96tW8V8.mp4/MC7l96tW8V8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MC7l96tW8V8.m3u8/MC7l96tW8V8.m3u8"}, "slug": "linear-algebra-least-squares-approximation", "video_id": "MC7l96tW8V8", "youtube_id": "MC7l96tW8V8", "readable_id": "linear-algebra-least-squares-approximation"}, "MR9CrsF3D00": {"duration": 220, "path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/married-taxes-clarification/", "keywords": "", "id": "MR9CrsF3D00", "title": "Married taxes clarification", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MR9CrsF3D00.mp4/MR9CrsF3D00.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MR9CrsF3D00.mp4/MR9CrsF3D00.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MR9CrsF3D00.m3u8/MR9CrsF3D00.m3u8"}, "slug": "married-taxes-clarification", "video_id": "MR9CrsF3D00", "youtube_id": "MR9CrsF3D00", "readable_id": "married-taxes-clarification"}, "xJf6pHqLzs0": {"duration": 1155, "path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/entropy-intuition/", "keywords": "entropy, internal, energy, heat, thermodynamics", "id": "xJf6pHqLzs0", "title": "Entropy intuition", "description": "A discussion of what entropy is and what it isn't.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xJf6pHqLzs0.mp4/xJf6pHqLzs0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xJf6pHqLzs0.mp4/xJf6pHqLzs0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xJf6pHqLzs0.m3u8/xJf6pHqLzs0.m3u8"}, "slug": "entropy-intuition", "video_id": "xJf6pHqLzs0", "youtube_id": "xJf6pHqLzs0", "readable_id": "entropy-intuition"}, "dEAk0BHBYCM": {"duration": 405, "path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/simple-riemann-approximation-using-rectangles/", "keywords": "", "id": "dEAk0BHBYCM", "title": "Simple Riemann approximation using rectangles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dEAk0BHBYCM.mp4/dEAk0BHBYCM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dEAk0BHBYCM.mp4/dEAk0BHBYCM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dEAk0BHBYCM.m3u8/dEAk0BHBYCM.m3u8"}, "slug": "simple-riemann-approximation-using-rectangles", "video_id": "dEAk0BHBYCM", "youtube_id": "dEAk0BHBYCM", "readable_id": "simple-riemann-approximation-using-rectangles"}, "0FufW_MZMa4": {"duration": 238, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/atrial-fibrillation/", "keywords": "", "id": "0FufW_MZMa4", "title": "Atrial fibrillation (Afib)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0FufW_MZMa4.mp4/0FufW_MZMa4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0FufW_MZMa4.mp4/0FufW_MZMa4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0FufW_MZMa4.m3u8/0FufW_MZMa4.m3u8"}, "slug": "atrial-fibrillation", "video_id": "0FufW_MZMa4", "youtube_id": "0FufW_MZMa4", "readable_id": "atrial-fibrillation"}, "cNFLqhU4MN0": {"duration": 529, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-5-introduction-to-bank-notes/", "keywords": "federal, reserve, bank, notes, cash, currency", "id": "cNFLqhU4MN0", "title": "Banking 5: Introduction to bank notes", "description": "Introduction to bank notes (which you are more familiar with than you realize).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cNFLqhU4MN0.mp4/cNFLqhU4MN0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cNFLqhU4MN0.mp4/cNFLqhU4MN0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cNFLqhU4MN0.m3u8/cNFLqhU4MN0.m3u8"}, "slug": "banking-5-introduction-to-bank-notes", "video_id": "cNFLqhU4MN0", "youtube_id": "cNFLqhU4MN0", "readable_id": "banking-5-introduction-to-bank-notes"}, "EDlZAyhWxhk": {"duration": 73, "path": "khan/math/geometry/congruence/transformations-congruence/another-congruence-by-transformation-example/", "keywords": "", "id": "EDlZAyhWxhk", "title": "How to determine that two figures are not congruent (example)", "description": "Sal shows that a given pair of pentagons are not congruent by showing it's not possible to map one onto the other using rigid transformations.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EDlZAyhWxhk.mp4/EDlZAyhWxhk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EDlZAyhWxhk.mp4/EDlZAyhWxhk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EDlZAyhWxhk.m3u8/EDlZAyhWxhk.m3u8"}, "slug": "another-congruence-by-transformation-example", "video_id": "EDlZAyhWxhk", "youtube_id": "EDlZAyhWxhk", "readable_id": "another-congruence-by-transformation-example"}, "gW54YZzQsHE": {"duration": 208, "path": "khan/science/discoveries-projects/robots/spider_bot/5-attach-spider-s-motor-controller-and-wire-his-motors/", "keywords": "", "id": "gW54YZzQsHE", "title": "Spider's motor controller", "description": "In this video we show you how to connect and wire Spider's motor controller.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gW54YZzQsHE.mp4/gW54YZzQsHE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gW54YZzQsHE.mp4/gW54YZzQsHE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gW54YZzQsHE.m3u8/gW54YZzQsHE.m3u8"}, "slug": "5-attach-spider-s-motor-controller-and-wire-his-motors", "video_id": "gW54YZzQsHE", "youtube_id": "gW54YZzQsHE", "readable_id": "5-attach-spider-s-motor-controller-and-wire-his-motors"}, "i78cyClvaeg": {"duration": 232, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/piketty-capital/", "keywords": "", "id": "i78cyClvaeg", "title": "Capital by Thomas Piketty", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i78cyClvaeg.mp4/i78cyClvaeg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i78cyClvaeg.mp4/i78cyClvaeg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i78cyClvaeg.m3u8/i78cyClvaeg.m3u8"}, "slug": "piketty-capital", "video_id": "i78cyClvaeg", "youtube_id": "i78cyClvaeg", "readable_id": "piketty-capital"}, "xx9xNJlPOJo": {"duration": 536, "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/gains-from-trade-tutorial/comparative-advantage-specialization-and-gains-from-trade/", "keywords": "comparative, absolute, advantage, economics, microecon", "id": "xx9xNJlPOJo", "title": "Comparative advantage specialization and gains from trade", "description": "How two parties can get better outcomes by specializing in their comparative advantage and trading", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xx9xNJlPOJo.mp4/xx9xNJlPOJo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xx9xNJlPOJo.mp4/xx9xNJlPOJo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xx9xNJlPOJo.m3u8/xx9xNJlPOJo.m3u8"}, "slug": "comparative-advantage-specialization-and-gains-from-trade", "video_id": "xx9xNJlPOJo", "youtube_id": "xx9xNJlPOJo", "readable_id": "comparative-advantage-specialization-and-gains-from-trade"}, "FyiwPshXyE8": {"duration": 102, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-4-5/", "keywords": "", "id": "FyiwPshXyE8", "title": "5 Not a solution to an equation", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FyiwPshXyE8.mp4/FyiwPshXyE8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FyiwPshXyE8.mp4/FyiwPshXyE8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FyiwPshXyE8.m3u8/FyiwPshXyE8.m3u8"}, "slug": "sat-2010-may-4-5", "video_id": "FyiwPshXyE8", "youtube_id": "FyiwPshXyE8", "readable_id": "sat-2010-may-4-5"}, "L3Ka3oRD8G8": {"duration": 593, "path": "khan/humanities/history/euro-hist/middle-east-20th-century/sinai-palestine-and-mesopotamia-campaigns/", "keywords": "", "id": "L3Ka3oRD8G8", "title": "Sinai, Palestine and Mesopotamia campaigns", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L3Ka3oRD8G8.mp4/L3Ka3oRD8G8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L3Ka3oRD8G8.mp4/L3Ka3oRD8G8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L3Ka3oRD8G8.m3u8/L3Ka3oRD8G8.m3u8"}, "slug": "sinai-palestine-and-mesopotamia-campaigns", "video_id": "L3Ka3oRD8G8", "youtube_id": "L3Ka3oRD8G8", "readable_id": "sinai-palestine-and-mesopotamia-campaigns"}, "B9vXathZikM": {"duration": 272, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/jan-van-eyck-portrait-of-a-man-self-portrait/", "keywords": "Renaissance, van Eyck,", "id": "B9vXathZikM", "title": "Jan van Eyck, Portrait of a Man in a Red Turban (Self-Portrait?), 1433", "description": "Jan van Eyck, Portrait of a Man in a Red Turban (Self-Portrait?),\u00a01433, oil on oak panel, 26 x 19 cm (The National Gallery, London)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/B9vXathZikM.mp4/B9vXathZikM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/B9vXathZikM.mp4/B9vXathZikM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/B9vXathZikM.m3u8/B9vXathZikM.m3u8"}, "slug": "jan-van-eyck-portrait-of-a-man-self-portrait", "video_id": "B9vXathZikM", "youtube_id": "B9vXathZikM", "readable_id": "jan-van-eyck-portrait-of-a-man-self-portrait"}, "RhUdv0jjfcE": {"duration": 350, "path": "khan/science/physics/two-dimensional-motion/optimal-projectile-angle/optimal-angle-for-a-projectile-part-1/", "keywords": "Optimal, angle, for, a, projectile, part, 1", "id": "RhUdv0jjfcE", "title": "Optimal angle for a projectile part 1: Components of initial velocity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RhUdv0jjfcE.mp4/RhUdv0jjfcE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RhUdv0jjfcE.mp4/RhUdv0jjfcE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RhUdv0jjfcE.m3u8/RhUdv0jjfcE.m3u8"}, "slug": "optimal-angle-for-a-projectile-part-1", "video_id": "RhUdv0jjfcE", "youtube_id": "RhUdv0jjfcE", "readable_id": "optimal-angle-for-a-projectile-part-1"}, "h9ZgZimXn2Q": {"duration": 493, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/why-of-algebra/why-we-do-the-same-thing-to-both-sides-basic-systems/", "keywords": "Why, we, do, the, same, thing, to, both, sides, basic, systems", "id": "h9ZgZimXn2Q", "title": "Why we do the same thing to both sides basic systems", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h9ZgZimXn2Q.mp4/h9ZgZimXn2Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h9ZgZimXn2Q.mp4/h9ZgZimXn2Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h9ZgZimXn2Q.m3u8/h9ZgZimXn2Q.m3u8"}, "slug": "why-we-do-the-same-thing-to-both-sides-basic-systems", "video_id": "h9ZgZimXn2Q", "youtube_id": "h9ZgZimXn2Q", "readable_id": "why-we-do-the-same-thing-to-both-sides-basic-systems"}, "vP23dkY0mPo": {"duration": 211, "path": "khan/test-prep/mcat/biomolecules/dna-technology/gene-expression-and-function/", "keywords": "", "id": "vP23dkY0mPo", "title": "Gene expression and function", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vP23dkY0mPo.mp4/vP23dkY0mPo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vP23dkY0mPo.mp4/vP23dkY0mPo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vP23dkY0mPo.m3u8/vP23dkY0mPo.m3u8"}, "slug": "gene-expression-and-function", "video_id": "vP23dkY0mPo", "youtube_id": "vP23dkY0mPo", "readable_id": "gene-expression-and-function"}, "g0iKG-ieZ2s": {"duration": 159, "path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/room-1730-1765/", "keywords": "Tate", "id": "g0iKG-ieZ2s", "title": "Room: 1730-1765", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Tim Batchelor explores the period 1730-1765.\n\nLearn more about the art featured in this video:\n-\u00a0William Hogarth, The Painter and his Pug, 1745\n-\u00a0Thomas Gainsborough, Wooded Landscape with a Peasant Resting, 1747", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g0iKG-ieZ2s.mp4/g0iKG-ieZ2s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g0iKG-ieZ2s.mp4/g0iKG-ieZ2s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g0iKG-ieZ2s.m3u8/g0iKG-ieZ2s.m3u8"}, "slug": "room-1730-1765", "video_id": "g0iKG-ieZ2s", "youtube_id": "g0iKG-ieZ2s", "readable_id": "room-1730-1765"}, "vZOk8NnjILg": {"duration": 647, "path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/centripetal-force-and-acceleration-intuition/", "keywords": "gravity, tension, friction", "id": "vZOk8NnjILg", "title": "Centripetal force and acceleration intuition", "description": "The direction of the force in cases of circular motion at constant speeds", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vZOk8NnjILg.mp4/vZOk8NnjILg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vZOk8NnjILg.mp4/vZOk8NnjILg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vZOk8NnjILg.m3u8/vZOk8NnjILg.m3u8"}, "slug": "centripetal-force-and-acceleration-intuition", "video_id": "vZOk8NnjILg", "youtube_id": "vZOk8NnjILg", "readable_id": "centripetal-force-and-acceleration-intuition"}, "5ABpqVSx33I": {"duration": 399, "path": "khan/math/probability/statistics-inferential/hypothesis-testing/z-statistics-vs-t-statistics/", "keywords": "Z-statistics, vs., T-statistics, t-distribution", "id": "5ABpqVSx33I", "title": "Z-statistics vs. T-statistics", "description": "Z-statistics vs. T-statistics", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5ABpqVSx33I.mp4/5ABpqVSx33I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5ABpqVSx33I.mp4/5ABpqVSx33I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5ABpqVSx33I.m3u8/5ABpqVSx33I.m3u8"}, "slug": "z-statistics-vs-t-statistics", "video_id": "5ABpqVSx33I", "youtube_id": "5ABpqVSx33I", "readable_id": "z-statistics-vs-t-statistics"}, "EHEecXYsJ9w": {"duration": 629, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions/tonsillopharyngitis-complications-diagnosis-and-treatment/", "keywords": "", "id": "EHEecXYsJ9w", "title": "Tonsillopharyngitis - Complications, diagnosis, and treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EHEecXYsJ9w.mp4/EHEecXYsJ9w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EHEecXYsJ9w.mp4/EHEecXYsJ9w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EHEecXYsJ9w.m3u8/EHEecXYsJ9w.m3u8"}, "slug": "tonsillopharyngitis-complications-diagnosis-and-treatment", "video_id": "EHEecXYsJ9w", "youtube_id": "EHEecXYsJ9w", "readable_id": "tonsillopharyngitis-complications-diagnosis-and-treatment"}, "W0BG49ir32E": {"duration": 547, "path": "khan/partner-content/wi-phi/metaphys-epistemology/conditionals-pt4/", "keywords": "", "id": "W0BG49ir32E", "title": "Language: Conditionals, Part 4", "description": "In this video, Justin picks up where part 3 left off. \u00a0He introduces the Conditional Assertion Theory of conditionals, which aims to resolve the problems presented for the other theories of conditionals. In the end, Justin presents yet another problem for this radical new theory.\n\nSpeaker: Dr. Justin Khoo, Assistant Professor, MIT", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W0BG49ir32E.mp4/W0BG49ir32E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W0BG49ir32E.mp4/W0BG49ir32E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W0BG49ir32E.m3u8/W0BG49ir32E.m3u8"}, "slug": "conditionals-pt4", "video_id": "W0BG49ir32E", "youtube_id": "W0BG49ir32E", "readable_id": "conditionals-pt4"}, "f8GK2oEN-uI": {"duration": 362, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/plates-moving-due-to-convection-in-mantle/", "keywords": "geology, tectonics, plate", "id": "f8GK2oEN-uI", "title": "Plates moving due to convection in mantle", "description": "Plates Moving Due to Convection in Mantle", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/f8GK2oEN-uI.mp4/f8GK2oEN-uI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/f8GK2oEN-uI.mp4/f8GK2oEN-uI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/f8GK2oEN-uI.m3u8/f8GK2oEN-uI.m3u8"}, "slug": "plates-moving-due-to-convection-in-mantle", "video_id": "f8GK2oEN-uI", "youtube_id": "f8GK2oEN-uI", "readable_id": "plates-moving-due-to-convection-in-mantle"}, "XYWFGJ2aYRU": {"duration": 328, "path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/attribution-theory-attribution-error-and-culture/", "keywords": "", "id": "XYWFGJ2aYRU", "title": "Attribution theory - Attribution error and culture", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XYWFGJ2aYRU.mp4/XYWFGJ2aYRU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XYWFGJ2aYRU.mp4/XYWFGJ2aYRU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XYWFGJ2aYRU.m3u8/XYWFGJ2aYRU.m3u8"}, "slug": "attribution-theory-attribution-error-and-culture", "video_id": "XYWFGJ2aYRU", "youtube_id": "XYWFGJ2aYRU", "readable_id": "attribution-theory-attribution-error-and-culture"}, "jTCZfMMcHBo": {"duration": 243, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/interpreting_linear_functions/slope-example/", "keywords": "U04_L1_T1_we2, Slope, Example, CC_8_EE_5, CC_39336_F-LE_1_b", "id": "jTCZfMMcHBo", "title": "Interpreting linear tables word problems example 1", "description": "Slope Example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jTCZfMMcHBo.mp4/jTCZfMMcHBo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jTCZfMMcHBo.mp4/jTCZfMMcHBo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jTCZfMMcHBo.m3u8/jTCZfMMcHBo.m3u8"}, "slug": "slope-example", "video_id": "jTCZfMMcHBo", "youtube_id": "jTCZfMMcHBo", "readable_id": "slope-example"}, "ccaCl1GKdJ0": {"duration": 200, "path": "khan/economics-finance-domain/core-finance/derivative-securities/credit-default-swaps-tut/credit-default-swaps-cds-intro/", "keywords": "credit, default, swaps, CDS", "id": "ccaCl1GKdJ0", "title": "Credit default swaps (CDS) intro", "description": "Introduction to credit default swaps and why they can be dangerous", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ccaCl1GKdJ0.mp4/ccaCl1GKdJ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ccaCl1GKdJ0.mp4/ccaCl1GKdJ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ccaCl1GKdJ0.m3u8/ccaCl1GKdJ0.m3u8"}, "slug": "credit-default-swaps-cds-intro", "video_id": "ccaCl1GKdJ0", "youtube_id": "ccaCl1GKdJ0", "readable_id": "credit-default-swaps-cds-intro"}, "-MaD9Ycy3a4": {"duration": 575, "path": "khan/test-prep/mcat/physical-processes/capacitors/capacitors-series/", "keywords": "capacitors, series, circuits", "id": "-MaD9Ycy3a4", "title": "Capacitors in series", "description": "The effect on voltage and current when capacitors are constructed in series in a circuit. By David Santo Pietro.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-MaD9Ycy3a4.mp4/-MaD9Ycy3a4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-MaD9Ycy3a4.mp4/-MaD9Ycy3a4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-MaD9Ycy3a4.m3u8/-MaD9Ycy3a4.m3u8"}, "slug": "capacitors-series", "video_id": "-MaD9Ycy3a4", "youtube_id": "-MaD9Ycy3a4", "readable_id": "capacitors-series"}, "MOoGlIpNLkM": {"duration": 187, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/sat-5-home-colors/", "keywords": "", "id": "MOoGlIpNLkM", "title": "5 Home colors", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MOoGlIpNLkM.mp4/MOoGlIpNLkM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MOoGlIpNLkM.mp4/MOoGlIpNLkM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MOoGlIpNLkM.m3u8/MOoGlIpNLkM.m3u8"}, "slug": "sat-5-home-colors", "video_id": "MOoGlIpNLkM", "youtube_id": "MOoGlIpNLkM", "readable_id": "sat-5-home-colors"}, "kY8FEq0teOs": {"duration": 618, "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/electrotonic-action-potential/", "keywords": "", "id": "kY8FEq0teOs", "title": "Electrotonic and action potential", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kY8FEq0teOs.mp4/kY8FEq0teOs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kY8FEq0teOs.mp4/kY8FEq0teOs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kY8FEq0teOs.m3u8/kY8FEq0teOs.m3u8"}, "slug": "electrotonic-action-potential", "video_id": "kY8FEq0teOs", "youtube_id": "kY8FEq0teOs", "readable_id": "electrotonic-action-potential"}, "okxU0GB2eCM": {"duration": 405, "path": "khan/humanities/medieval-world/medieval-book/making-medieval-book/medieval-textbook/", "keywords": "art history, middle ages, manuscripts, ", "id": "okxU0GB2eCM", "title": "A Medieval textbook", "description": "Dr. Erik Kwakkel and Dr. Beth Harris look at a medieval textbook: Boethius, De institutione arithmetica, c. 1100 (National Library of the Netherlands, The Hague, \u00a0MS 78 E 59). With special thanks to Ed van der Vlist, Curator of Medieval Manuscripts, Koninklijke Bibliotheek, National Library of the Netherlands", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/okxU0GB2eCM.mp4/okxU0GB2eCM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/okxU0GB2eCM.mp4/okxU0GB2eCM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/okxU0GB2eCM.m3u8/okxU0GB2eCM.m3u8"}, "slug": "medieval-textbook", "video_id": "okxU0GB2eCM", "youtube_id": "okxU0GB2eCM", "readable_id": "medieval-textbook"}, "kJSOqlcFpJw": {"duration": 690, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/becoming-a-red-giant/", "keywords": "Becoming, Red, Giant, stellar, evolution", "id": "kJSOqlcFpJw", "title": "Becoming a red giant", "description": "Becoming a Red Giant", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kJSOqlcFpJw.mp4/kJSOqlcFpJw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kJSOqlcFpJw.mp4/kJSOqlcFpJw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kJSOqlcFpJw.m3u8/kJSOqlcFpJw.m3u8"}, "slug": "becoming-a-red-giant", "video_id": "kJSOqlcFpJw", "youtube_id": "kJSOqlcFpJw", "readable_id": "becoming-a-red-giant"}, "mGxomKWfJXs": {"duration": 502, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/cerebral-cortex/", "keywords": "", "id": "mGxomKWfJXs", "title": "Cerebral cortex", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mGxomKWfJXs.mp4/mGxomKWfJXs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mGxomKWfJXs.mp4/mGxomKWfJXs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mGxomKWfJXs.m3u8/mGxomKWfJXs.m3u8"}, "slug": "cerebral-cortex", "video_id": "mGxomKWfJXs", "youtube_id": "mGxomKWfJXs", "readable_id": "cerebral-cortex"}, "pDZIvyeqX1o": {"duration": 385, "path": "khan/math/geometry/triangle-properties/altitudes/common-orthocenter-and-centroid/", "keywords": "geometry", "id": "pDZIvyeqX1o", "title": "Common orthocenter and centroid", "description": "Showing that a triangle with the same point as the orthocenter and centroid is equilateral", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pDZIvyeqX1o.mp4/pDZIvyeqX1o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pDZIvyeqX1o.mp4/pDZIvyeqX1o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pDZIvyeqX1o.m3u8/pDZIvyeqX1o.m3u8"}, "slug": "common-orthocenter-and-centroid", "video_id": "pDZIvyeqX1o", "youtube_id": "pDZIvyeqX1o", "readable_id": "common-orthocenter-and-centroid"}, "cGvrADwJnZU": {"duration": 198, "path": "khan/partner-content/exploratorium/light-and-color/soap-film-interference-model/do-the-experiment-part-1-soap-film-interference-model-science-snacks-exploratorium/", "keywords": "light,soap,bubbles,wavelength,physics,NGSS,demonstration,lesson,teaching,science,color,interference", "id": "cGvrADwJnZU", "title": "Do the experiment: Part 1", "description": "In Part 1 of this Science Snack, Paul Doherty of the Exploratorium's Teacher Institute models what happens when a soap film is one wavelength of blue light thick.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cGvrADwJnZU.mp4/cGvrADwJnZU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cGvrADwJnZU.mp4/cGvrADwJnZU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cGvrADwJnZU.m3u8/cGvrADwJnZU.m3u8"}, "slug": "do-the-experiment-part-1-soap-film-interference-model-science-snacks-exploratorium", "video_id": "cGvrADwJnZU", "youtube_id": "cGvrADwJnZU", "readable_id": "do-the-experiment-part-1-soap-film-interference-model-science-snacks-exploratorium"}, "XFmovUAWQUQ": {"duration": 727, "path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/biodiversity-global/how-does-climate-change-affect-biodiversity/", "keywords": "", "id": "XFmovUAWQUQ", "title": "How does climate change affect biodiversity?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XFmovUAWQUQ.mp4/XFmovUAWQUQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XFmovUAWQUQ.mp4/XFmovUAWQUQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XFmovUAWQUQ.m3u8/XFmovUAWQUQ.m3u8"}, "slug": "how-does-climate-change-affect-biodiversity", "video_id": "XFmovUAWQUQ", "youtube_id": "XFmovUAWQUQ", "readable_id": "how-does-climate-change-affect-biodiversity"}, "k68CPfcehTE": {"duration": 111, "path": "khan/math/arithmetic/multiplication-division/multi_digit_multiplication/2-digit-times-1-digit-example-no-carrying/", "keywords": "", "id": "k68CPfcehTE", "title": "Multiplying: 2 digits times 1 digit", "description": "Let's start by solving a basic multiplication problem. No carrying of numbers in this example!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/k68CPfcehTE.mp4/k68CPfcehTE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/k68CPfcehTE.mp4/k68CPfcehTE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/k68CPfcehTE.m3u8/k68CPfcehTE.m3u8"}, "slug": "2-digit-times-1-digit-example-no-carrying", "video_id": "k68CPfcehTE", "youtube_id": "k68CPfcehTE", "readable_id": "2-digit-times-1-digit-example-no-carrying"}, "oxpr5dhqqyw": {"duration": 386, "path": "khan/computing/computer-science/informationtheory/info-theory/the-battery-electromagnetism/", "keywords": "battery, electromagnetism", "id": "oxpr5dhqqyw", "title": "The battery and electromagnetism", "description": "The key technologies in our story.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oxpr5dhqqyw.mp4/oxpr5dhqqyw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oxpr5dhqqyw.mp4/oxpr5dhqqyw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oxpr5dhqqyw.m3u8/oxpr5dhqqyw.m3u8"}, "slug": "the-battery-electromagnetism", "video_id": "oxpr5dhqqyw", "youtube_id": "oxpr5dhqqyw", "readable_id": "the-battery-electromagnetism"}, "rm3NjcSmFFo": {"duration": 213, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-sub-100-word-problems/losing-tennis-balls/", "keywords": "", "id": "rm3NjcSmFFo", "title": "Losing tennis balls", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rm3NjcSmFFo.mp4/rm3NjcSmFFo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rm3NjcSmFFo.mp4/rm3NjcSmFFo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rm3NjcSmFFo.m3u8/rm3NjcSmFFo.m3u8"}, "slug": "losing-tennis-balls", "video_id": "rm3NjcSmFFo", "youtube_id": "rm3NjcSmFFo", "readable_id": "losing-tennis-balls"}, "-cR6FzM1zNE": {"duration": 386, "path": "khan/math/integral-calculus/solid_revolution_topic/area-polar-graphs/cardioid-area/", "keywords": "", "id": "-cR6FzM1zNE", "title": "Area enclosed by cardioid", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-cR6FzM1zNE.mp4/-cR6FzM1zNE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-cR6FzM1zNE.mp4/-cR6FzM1zNE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-cR6FzM1zNE.m3u8/-cR6FzM1zNE.m3u8"}, "slug": "cardioid-area", "video_id": "-cR6FzM1zNE", "youtube_id": "-cR6FzM1zNE", "readable_id": "cardioid-area"}, "mSVrqKZDRF4": {"duration": 482, "path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/implicit-differentiation-1/", "keywords": "", "id": "mSVrqKZDRF4", "title": "Implicit differentiation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mSVrqKZDRF4.mp4/mSVrqKZDRF4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mSVrqKZDRF4.mp4/mSVrqKZDRF4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mSVrqKZDRF4.m3u8/mSVrqKZDRF4.m3u8"}, "slug": "implicit-differentiation-1", "video_id": "mSVrqKZDRF4", "youtube_id": "mSVrqKZDRF4", "readable_id": "implicit-differentiation-1"}, "X_YXTWU2maY": {"duration": 284, "path": "khan/test-prep/mcat/chemical-processes/enzymes/an-introduction-to-enzyme-kinetics/", "keywords": "", "id": "X_YXTWU2maY", "title": "An introduction to enzyme kinetics", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X_YXTWU2maY.mp4/X_YXTWU2maY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X_YXTWU2maY.mp4/X_YXTWU2maY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X_YXTWU2maY.m3u8/X_YXTWU2maY.m3u8"}, "slug": "an-introduction-to-enzyme-kinetics", "video_id": "X_YXTWU2maY", "youtube_id": "X_YXTWU2maY", "readable_id": "an-introduction-to-enzyme-kinetics"}, "3xCzhdVtdMI": {"duration": 504, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/supply-curve-tutorial/law-of-supply/", "keywords": "economics, supply, demand", "id": "3xCzhdVtdMI", "title": "Law of supply", "description": "Introduction to the Law of Supply", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3xCzhdVtdMI.mp4/3xCzhdVtdMI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3xCzhdVtdMI.mp4/3xCzhdVtdMI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3xCzhdVtdMI.m3u8/3xCzhdVtdMI.m3u8"}, "slug": "law-of-supply", "video_id": "3xCzhdVtdMI", "youtube_id": "3xCzhdVtdMI", "readable_id": "law-of-supply"}, "GpBD_1pT_mw": {"duration": 59, "path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-emulsion/", "keywords": "", "id": "GpBD_1pT_mw", "title": "Art Terms in Action: Emulsion", "description": "Learn why Willem de Kooning added raw egg to his paint. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GpBD_1pT_mw.mp4/GpBD_1pT_mw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GpBD_1pT_mw.mp4/GpBD_1pT_mw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GpBD_1pT_mw.m3u8/GpBD_1pT_mw.m3u8"}, "slug": "moma-art-term-emulsion", "video_id": "GpBD_1pT_mw", "youtube_id": "GpBD_1pT_mw", "readable_id": "moma-art-term-emulsion"}, "JS3wsNY17LY": {"duration": 352, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-diagnosis/", "keywords": "", "id": "JS3wsNY17LY", "title": "Lung cancer diagnosis", "description": "How do we know a patient has lung cancer? Learn how health professionals use x-rays, computed tomography (CT scans), positron emission tomography (PET scans), and blood results to confirm lung cancer in patients.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JS3wsNY17LY.mp4/JS3wsNY17LY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JS3wsNY17LY.mp4/JS3wsNY17LY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JS3wsNY17LY.m3u8/JS3wsNY17LY.m3u8"}, "slug": "lung-cancer-diagnosis", "video_id": "JS3wsNY17LY", "youtube_id": "JS3wsNY17LY", "readable_id": "lung-cancer-diagnosis"}, "SUoqA9srY1Q": {"duration": 402, "path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/lin-alg-finding-projection-onto-subspace-with-orthonormal-basis-example/", "keywords": "basis, orthonormal, projection, proj", "id": "SUoqA9srY1Q", "title": "Finding projection onto subspace with orthonormal basis example", "description": "Example of finding the transformation matrix for the projection onto a subspace with an orthonormal basis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SUoqA9srY1Q.mp4/SUoqA9srY1Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SUoqA9srY1Q.mp4/SUoqA9srY1Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SUoqA9srY1Q.m3u8/SUoqA9srY1Q.m3u8"}, "slug": "lin-alg-finding-projection-onto-subspace-with-orthonormal-basis-example", "video_id": "SUoqA9srY1Q", "youtube_id": "SUoqA9srY1Q", "readable_id": "lin-alg-finding-projection-onto-subspace-with-orthonormal-basis-example"}, "sZRkERfzzn4": {"duration": 800, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/inflation-deflation-3-obama-stimulus-plan/", "keywords": "obama, stimulus, inflation, deflation", "id": "sZRkERfzzn4", "title": "Inflation and deflation 3: Obama stimulus plan", "description": "Is the stimulus large enough to offset the demand shock caused by the contraction in credit? Will it lead to inflation?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sZRkERfzzn4.mp4/sZRkERfzzn4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sZRkERfzzn4.mp4/sZRkERfzzn4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sZRkERfzzn4.m3u8/sZRkERfzzn4.m3u8"}, "slug": "inflation-deflation-3-obama-stimulus-plan", "video_id": "sZRkERfzzn4", "youtube_id": "sZRkERfzzn4", "readable_id": "inflation-deflation-3-obama-stimulus-plan"}, "CecgFWTg9pQ": {"duration": 268, "path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/geometric-series-introduction/", "keywords": "", "id": "CecgFWTg9pQ", "title": "Geometric series", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CecgFWTg9pQ.mp4/CecgFWTg9pQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CecgFWTg9pQ.mp4/CecgFWTg9pQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CecgFWTg9pQ.m3u8/CecgFWTg9pQ.m3u8"}, "slug": "geometric-series-introduction", "video_id": "CecgFWTg9pQ", "youtube_id": "CecgFWTg9pQ", "readable_id": "geometric-series-introduction"}, "mvye6X_0upA": {"duration": 394, "path": "khan/math/probability/statistics-inferential/hypothesis-testing/one-tailed-and-two-tailed-tests/", "keywords": "One-Tailed, and, Two-Tailed, Tests", "id": "mvye6X_0upA", "title": "One-tailed and two-tailed tests", "description": "One-Tailed and Two-Tailed Tests", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mvye6X_0upA.mp4/mvye6X_0upA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mvye6X_0upA.mp4/mvye6X_0upA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mvye6X_0upA.m3u8/mvye6X_0upA.m3u8"}, "slug": "one-tailed-and-two-tailed-tests", "video_id": "mvye6X_0upA", "youtube_id": "mvye6X_0upA", "readable_id": "one-tailed-and-two-tailed-tests"}, "kgsiYzcosDY": {"duration": 177, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-9-similar-triangles/", "keywords": "", "id": "kgsiYzcosDY", "title": "9 Similar triangles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kgsiYzcosDY.mp4/kgsiYzcosDY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kgsiYzcosDY.mp4/kgsiYzcosDY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kgsiYzcosDY.m3u8/kgsiYzcosDY.m3u8"}, "slug": "sat-9-similar-triangles", "video_id": "kgsiYzcosDY", "youtube_id": "kgsiYzcosDY", "readable_id": "sat-9-similar-triangles"}, "p3MPAgnbMk8": {"duration": 596, "path": "khan/test-prep/mcat/behavior/social-psychology/asch-conformity-studies-asch-line-studies/", "keywords": "", "id": "p3MPAgnbMk8", "title": "Asch conformity studies (Asch line studies)", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p3MPAgnbMk8.mp4/p3MPAgnbMk8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p3MPAgnbMk8.mp4/p3MPAgnbMk8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p3MPAgnbMk8.m3u8/p3MPAgnbMk8.m3u8"}, "slug": "asch-conformity-studies-asch-line-studies", "video_id": "p3MPAgnbMk8", "youtube_id": "p3MPAgnbMk8", "readable_id": "asch-conformity-studies-asch-line-studies"}, "YYEgq1bweN4": {"duration": 783, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic/detectable-civilizations-in-our-galaxy-1/", "keywords": "drake, equation, cosmology, seti", "id": "YYEgq1bweN4", "title": "Detectable civilizations in our galaxy 1", "description": "A framework for thinking about how many detectable civilizations are out there.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YYEgq1bweN4.mp4/YYEgq1bweN4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YYEgq1bweN4.mp4/YYEgq1bweN4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YYEgq1bweN4.m3u8/YYEgq1bweN4.m3u8"}, "slug": "detectable-civilizations-in-our-galaxy-1", "video_id": "YYEgq1bweN4", "youtube_id": "YYEgq1bweN4", "readable_id": "detectable-civilizations-in-our-galaxy-1"}, "4LmIyMyAuN0": {"duration": 555, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/quasars/quasars/", "keywords": "Quasars, black, hole", "id": "4LmIyMyAuN0", "title": "Quasars", "description": "Quasars", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4LmIyMyAuN0.mp4/4LmIyMyAuN0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4LmIyMyAuN0.mp4/4LmIyMyAuN0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4LmIyMyAuN0.m3u8/4LmIyMyAuN0.m3u8"}, "slug": "quasars", "video_id": "4LmIyMyAuN0", "youtube_id": "4LmIyMyAuN0", "readable_id": "quasars"}, "6G1MQi2VFMI": {"duration": 678, "path": "khan/test-prep/mcat/physical-processes/speed-and-velocity/calculating-average-speed-and-velocity-edited/", "keywords": "", "id": "6G1MQi2VFMI", "title": "Calculating average speed and velocity edited", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6G1MQi2VFMI.mp4/6G1MQi2VFMI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6G1MQi2VFMI.mp4/6G1MQi2VFMI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6G1MQi2VFMI.m3u8/6G1MQi2VFMI.m3u8"}, "slug": "calculating-average-speed-and-velocity-edited", "video_id": "6G1MQi2VFMI", "youtube_id": "6G1MQi2VFMI", "readable_id": "calculating-average-speed-and-velocity-edited"}, "Xs3DzydSKu8": {"duration": 255, "path": "khan/humanities/global-culture/global-art-architecture/mona-hatoum/", "keywords": "Tate", "id": "Xs3DzydSKu8", "title": "Mona Hatoum's self-contradictory objects", "description": "This video brought to you by\u00a0Tate.org.uk\n\nPalestinian, London-based artist Mona Hatoum creates art that challenging our perceptions of everyday objects. \"Often my work is about conflict and contradiction, and that contradiction can be within the actual object,\" she explains. One of her sculptures is a simple wheelchair, an unremarkable object apart from the fact that its handles have been replaced with knives. Another is a baby\u2019s cot, but one with the bottom taken out and replaced with taut, menacing wires. Sometimes the materials she works with are unexpected, like the soap she used to draw a map of a peace agreement between Israel and Palestine.\nThere are many internal contradictions at work in Hatoum\u2019s art. What purpose do they serve? Do they get you thinking about commonplace objects in uncommon ways?\n\nClick here to learn more about Mona Hatoum and her work.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Xs3DzydSKu8.mp4/Xs3DzydSKu8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Xs3DzydSKu8.mp4/Xs3DzydSKu8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Xs3DzydSKu8.m3u8/Xs3DzydSKu8.m3u8"}, "slug": "mona-hatoum", "video_id": "Xs3DzydSKu8", "youtube_id": "Xs3DzydSKu8", "readable_id": "mona-hatoum"}, "TXrOpjG4dUs": {"duration": 676, "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/business-cycle-tutorial/the-business-cycle/", "keywords": "macroeconomics, depression, recession, expansion", "id": "TXrOpjG4dUs", "title": "The business cycle", "description": "The business cycle and how it may be driven by emotion", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TXrOpjG4dUs.mp4/TXrOpjG4dUs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TXrOpjG4dUs.mp4/TXrOpjG4dUs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TXrOpjG4dUs.m3u8/TXrOpjG4dUs.m3u8"}, "slug": "the-business-cycle", "video_id": "TXrOpjG4dUs", "youtube_id": "TXrOpjG4dUs", "readable_id": "the-business-cycle"}, "xWTzH7RV80g": {"duration": 159, "path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/brancusi-bird-in-space-1928/", "keywords": "smarthistory, art history, Brancusi, MoMA", "id": "xWTzH7RV80g", "title": "Brancusi, Bird in Space", "description": "Constantin Brancusi, Bird in Space, bronze, limestone, wood, 1928 (MoMA) Speakers: Dr. Steven Zucker, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xWTzH7RV80g.mp4/xWTzH7RV80g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xWTzH7RV80g.mp4/xWTzH7RV80g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xWTzH7RV80g.m3u8/xWTzH7RV80g.m3u8"}, "slug": "brancusi-bird-in-space-1928", "video_id": "xWTzH7RV80g", "youtube_id": "xWTzH7RV80g", "readable_id": "brancusi-bird-in-space-1928"}, "Xwf3ZsGYzCU": {"duration": 455, "path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/autoionization-of-water/", "keywords": "", "id": "Xwf3ZsGYzCU", "title": "Autoionization of water", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Xwf3ZsGYzCU.mp4/Xwf3ZsGYzCU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Xwf3ZsGYzCU.mp4/Xwf3ZsGYzCU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Xwf3ZsGYzCU.m3u8/Xwf3ZsGYzCU.m3u8"}, "slug": "autoionization-of-water", "video_id": "Xwf3ZsGYzCU", "youtube_id": "Xwf3ZsGYzCU", "readable_id": "autoionization-of-water"}, "vhMl755vR5Q": {"duration": 547, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/disc-method-washer-method-for-rotation-around-x-axis/", "keywords": "", "id": "vhMl755vR5Q", "title": "Disc method (washer method) for rotation around x-axis", "description": "Finding the volume of a solid of revolution that is defined between two functions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vhMl755vR5Q.mp4/vhMl755vR5Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vhMl755vR5Q.mp4/vhMl755vR5Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vhMl755vR5Q.m3u8/vhMl755vR5Q.m3u8"}, "slug": "disc-method-washer-method-for-rotation-around-x-axis", "video_id": "vhMl755vR5Q", "youtube_id": "vhMl755vR5Q", "readable_id": "disc-method-washer-method-for-rotation-around-x-axis"}, "5MA0NQObHUk": {"duration": 195, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/dave-smith/kauffman-dave-smith-4/", "keywords": "", "id": "5MA0NQObHUk", "title": "Top of the World, Ma", "description": "When Dave Smith came to the harsh realization and he alone was in charge of his future, he took a resourceful route to become an expert in his field. Mixing the desire to make it with the imagination to fake it, he went to great lengths to connect with TekScape IT customers and make them believe that his tiny organization was big enough to solve their trickiest problems.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5MA0NQObHUk.mp4/5MA0NQObHUk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5MA0NQObHUk.mp4/5MA0NQObHUk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5MA0NQObHUk.m3u8/5MA0NQObHUk.m3u8"}, "slug": "kauffman-dave-smith-4", "video_id": "5MA0NQObHUk", "youtube_id": "5MA0NQObHUk", "readable_id": "kauffman-dave-smith-4"}, "Hw2_hv439Fg": {"duration": 383, "path": "khan/humanities/monarchy-enlightenment/neo-classicism/david-marat/", "keywords": "David, Jacque-Louis David, Neoclassicism, Neo-Classicism, France, French Revolution, Marat, Jean-Paul Marat, Corday, Charlotte Corday, Jacobins, Louis XVI, murder, bathtub, Brussels", "id": "Hw2_hv439Fg", "title": "Jacques-Louis David, The Death of Marat", "description": "Jacques-Louis David, The Death of Marat, 1793, oil on canvas, 65 x 50-1/2 inches (Royal Museums of Fine Arts of Belgium, Brussels)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hw2_hv439Fg.mp4/Hw2_hv439Fg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hw2_hv439Fg.mp4/Hw2_hv439Fg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hw2_hv439Fg.m3u8/Hw2_hv439Fg.m3u8"}, "slug": "david-marat", "video_id": "Hw2_hv439Fg", "youtube_id": "Hw2_hv439Fg", "readable_id": "david-marat"}, "2fijnNzktDI": {"duration": 384, "path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/duccio-maesta-front-1308-11/", "keywords": "Duccio, Maesta, Siena, Renaissance, Khan Academy, Smarthistory, Art History", "id": "2fijnNzktDI", "title": "Duccio, Maesta (front)", "description": "Duccio, Maesta (front), 1308-11 (Museo dell'Opera Metropolitana del Duomo, Siena) Speakers: Dr. Beth Harris and Dr. Steven Zucker.\n\nDuring this period, and for hundreds of years, Italy was not a unified country, but rather was divided into many small countries we call city-states.\u00a0Florence, Siena, Milan, Venice\u2014these were essentially independent nations with their own governments\u2014and they were at war with each other.\u00a0These city-states also had independent cultures with their own distinct styles in painting and sculpture. Siena had a unique style that emphasized decorative surfaces, sinuous lines, elongated figures and the heavy use of gold.\u00a0Duccio was the founder of the Sienese style and his work was quite different from the Florentine painter Giotto. Giotto emphasized a greater naturalism\u2014creating figures who are more monumental (large, heavy and with a greater sense of accurate proportion) and a greater illusion of three-dimensional space.\u00a0\n\nContemporaneous description of the procession that brought this painting to Siena Cathedral (or Duomo):\n\nAt this time the altarpiece for the high altar was finished and the picture which was called the \"Madonna with the large eyes\" or Our Lady of Grace, that now hangs over the altar of St. Boniface, was taken down. Now this Our Lady was she who had hearkened to the people of Siena when the Florentines were routed at Monte Aperto, and her place was changed because the new one was made, which is far more beautiful and devout and larger, and is painted on the back with the stories of the Old and New Testaments. And on the day that it was carried to the Duomo the shops were shut, and the bishop conducted a great and devout company of priests and friars in solemn procession, accompanied by the nine signiors, and all the officers of the commune, and all the people, and one after another the worthiest with lighted candles in their hands took places near the picture, and behind came the women and children with great devotion. And they accompanied the said picture up to the Duomo, making the procession around the Campo, as is the custom, all the bells ringing joyously, out of reverence for so noble a picture as this. And this picture Duccio di Niccol\u00f2 the painter made, and it was made in the house of the Muciatti outside the gate aStalloreggi. And all that day persons, praying God and His Mother, who is our advocate, to defend us by their infinite mercy from every adversity and all evil, and keep us from the hands of traitors and of the enemies of Siena. (English translation: Charles Eliot Norton,\u00a0Historical Studies of Church-Buildings in the Middle Ages: Venice, Siena, Florence\u00a0(New York: Harper & Brothers, 1880), 144-45;\u00a0Italian text:\u00a0G. Milanesi,\u00a0Documenti per la storia dell'arte senese\u00a0(Siena: 1854, I), 169)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2fijnNzktDI.mp4/2fijnNzktDI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2fijnNzktDI.mp4/2fijnNzktDI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2fijnNzktDI.m3u8/2fijnNzktDI.m3u8"}, "slug": "duccio-maesta-front-1308-11", "video_id": "2fijnNzktDI", "youtube_id": "2fijnNzktDI", "readable_id": "duccio-maesta-front-1308-11"}, "_RTF0DAHBBM": {"duration": 271, "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/introduction-to-intermolecular-forces/surface-tension/", "keywords": "education,online learning,learning,lessons,surface tension,cohesion,water", "id": "_RTF0DAHBBM", "title": "Surface tension", "description": "Surface tension in water, and how the surface tension is related to hydrogen bonding.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_RTF0DAHBBM.mp4/_RTF0DAHBBM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_RTF0DAHBBM.mp4/_RTF0DAHBBM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_RTF0DAHBBM.m3u8/_RTF0DAHBBM.m3u8"}, "slug": "surface-tension", "video_id": "_RTF0DAHBBM", "youtube_id": "_RTF0DAHBBM", "readable_id": "surface-tension"}, "k9cj_rZO448": {"duration": 452, "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/ruffinis-ending-and-hair-follicle-receptor-2/", "keywords": "", "id": "k9cj_rZO448", "title": "Ruffini's Ending and Hair Follicle Receptor", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/k9cj_rZO448.mp4/k9cj_rZO448.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/k9cj_rZO448.mp4/k9cj_rZO448.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/k9cj_rZO448.m3u8/k9cj_rZO448.m3u8"}, "slug": "ruffinis-ending-and-hair-follicle-receptor-2", "video_id": "k9cj_rZO448", "youtube_id": "k9cj_rZO448", "readable_id": "ruffinis-ending-and-hair-follicle-receptor-2"}, "jFn0dyU5wUw": {"duration": 805, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/baby-circulation-right-after-birth/", "keywords": "", "id": "jFn0dyU5wUw", "title": "Baby circulation right after birth", "description": "Watch how the blood flows through the baby's circulation and compare it to what happens in the fetus. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jFn0dyU5wUw.mp4/jFn0dyU5wUw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jFn0dyU5wUw.mp4/jFn0dyU5wUw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jFn0dyU5wUw.m3u8/jFn0dyU5wUw.m3u8"}, "slug": "baby-circulation-right-after-birth", "video_id": "jFn0dyU5wUw", "youtube_id": "jFn0dyU5wUw", "readable_id": "baby-circulation-right-after-birth"}, "iqHZp79FhO8": {"duration": 323, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-5-volt-power-distribution-board/", "keywords": "motor controller 5 volt power distribution bread board proto board bit-zee bot hack make diy robot bot", "id": "iqHZp79FhO8", "title": "5 volt power distribution board", "description": "In this video we hack apart a bread board to create a 5 volt power distribution strip. The 5 volts comes from the center pin in the motor controller and the negative or ground comes from the ground pin on the motor controller.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iqHZp79FhO8.mp4/iqHZp79FhO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iqHZp79FhO8.mp4/iqHZp79FhO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iqHZp79FhO8.m3u8/iqHZp79FhO8.m3u8"}, "slug": "bit-zee-s-5-volt-power-distribution-board", "video_id": "iqHZp79FhO8", "youtube_id": "iqHZp79FhO8", "readable_id": "bit-zee-s-5-volt-power-distribution-board"}, "Qz0n0ZwdCpQ": {"duration": 211, "path": "khan/science/discoveries-projects/lego-robotics/lego-coin-detector/lego-coinchallenge/", "keywords": "", "id": "Qz0n0ZwdCpQ", "title": "Design review (calibration)", "description": "Final step in the coin detector challenge", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qz0n0ZwdCpQ.mp4/Qz0n0ZwdCpQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qz0n0ZwdCpQ.mp4/Qz0n0ZwdCpQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qz0n0ZwdCpQ.m3u8/Qz0n0ZwdCpQ.m3u8"}, "slug": "lego-coinchallenge", "video_id": "Qz0n0ZwdCpQ", "youtube_id": "Qz0n0ZwdCpQ", "readable_id": "lego-coinchallenge"}, "e41Wh7jhoxc": {"duration": 423, "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/jacopo-tintoretto-the-miracle-of-the-slave/", "keywords": "Tintoretto Slave Venetian Venice Renaissance art history painting", "id": "e41Wh7jhoxc", "title": "Tintoretto, the Miracle of the Slave", "description": "Jacopo Tintoretto, The Miracle of the Slave, 1548, oil on canvas, 415 x 541 cm (Accademia, Venice)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e41Wh7jhoxc.mp4/e41Wh7jhoxc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e41Wh7jhoxc.mp4/e41Wh7jhoxc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e41Wh7jhoxc.m3u8/e41Wh7jhoxc.m3u8"}, "slug": "jacopo-tintoretto-the-miracle-of-the-slave", "video_id": "e41Wh7jhoxc", "youtube_id": "e41Wh7jhoxc", "readable_id": "jacopo-tintoretto-the-miracle-of-the-slave"}, "jPArsPD0EUQ": {"duration": 113, "path": "khan/partner-content/pixar/modeling-character/subdivision-averages/charactermodeling6/", "keywords": "", "id": "jPArsPD0EUQ", "title": "2. Weighted subdivision", "description": "Next let's see extend the averaging step from the previous lesson to include multiple points. Now we'll need to calculate positions using a weighted average (we we just covered).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jPArsPD0EUQ.mp4/jPArsPD0EUQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jPArsPD0EUQ.mp4/jPArsPD0EUQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jPArsPD0EUQ.m3u8/jPArsPD0EUQ.m3u8"}, "slug": "charactermodeling6", "video_id": "jPArsPD0EUQ", "youtube_id": "jPArsPD0EUQ", "readable_id": "charactermodeling6"}, "rCnb7vapl5o": {"duration": 385, "path": "khan/partner-content/wi-phi/metaphys-epistemology/argument-and-evidence/", "keywords": "", "id": "rCnb7vapl5o", "title": "Epistemology: Argument and Evidence", "description": "Greg discusses the role of argument and evidence in deciding what to believe, both in philosophy and more generally.\n\nSpeaker: Dr.\u00a0Greg Ganssle, Senior Fellow, Rivendell Institute, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rCnb7vapl5o.mp4/rCnb7vapl5o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rCnb7vapl5o.mp4/rCnb7vapl5o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rCnb7vapl5o.m3u8/rCnb7vapl5o.m3u8"}, "slug": "argument-and-evidence", "video_id": "rCnb7vapl5o", "youtube_id": "rCnb7vapl5o", "readable_id": "argument-and-evidence"}, "S3TlDyT2lyg": {"duration": 365, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/niobid-krater/", "keywords": "Greek, ancient, attic, red-figure, ceramics, pot, Niobe, Niobid, Diana, Apollo, Herakles, Marathon, Athena, Artemis", "id": "S3TlDyT2lyg", "title": "Attic Red-Figure: Niobid Painter, \"Niobid Krater\"", "description": "Niobid Painter, \"Niobid Krater,\" Attic red-figure calyx-krater, c. 460-50 B.C.E., 54 x 56 cm\u00a0(Mus\u00e9e du Louvre)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S3TlDyT2lyg.mp4/S3TlDyT2lyg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S3TlDyT2lyg.mp4/S3TlDyT2lyg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S3TlDyT2lyg.m3u8/S3TlDyT2lyg.m3u8"}, "slug": "niobid-krater", "video_id": "S3TlDyT2lyg", "youtube_id": "S3TlDyT2lyg", "readable_id": "niobid-krater"}, "kpqSeXpiM6k": {"duration": 618, "path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/geithner-5-a-better-solution/", "keywords": "toxic, asset, price, discovery, geithner, obama", "id": "kpqSeXpiM6k", "title": "Geithner plan 6: A better solution", "description": "A better way to solve the \"liquidity\" and \"price discovery\" problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kpqSeXpiM6k.mp4/kpqSeXpiM6k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kpqSeXpiM6k.mp4/kpqSeXpiM6k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kpqSeXpiM6k.m3u8/kpqSeXpiM6k.m3u8"}, "slug": "geithner-5-a-better-solution", "video_id": "kpqSeXpiM6k", "youtube_id": "kpqSeXpiM6k", "readable_id": "geithner-5-a-better-solution"}, "2QeDRsxSF9M": {"duration": 708, "path": "khan/math/probability/statistics-inferential/chi-square/pearson-s-chi-square-test-goodness-of-fit/", "keywords": "Pearson's, Chi, Square, Test, Goodness, of, Fit", "id": "2QeDRsxSF9M", "title": "Pearson's chi square test (goodness of fit)", "description": "Pearson's Chi Square Test (Goodness of Fit)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2QeDRsxSF9M.mp4/2QeDRsxSF9M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2QeDRsxSF9M.mp4/2QeDRsxSF9M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2QeDRsxSF9M.m3u8/2QeDRsxSF9M.m3u8"}, "slug": "pearson-s-chi-square-test-goodness-of-fit", "video_id": "2QeDRsxSF9M", "youtube_id": "2QeDRsxSF9M", "readable_id": "pearson-s-chi-square-test-goodness-of-fit"}, "Z7C4cz2HkeY": {"duration": 927, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/introduction-to-the-income-statement/", "keywords": "finance, income, statement, ROA, ROE, gross, profit, revenue", "id": "Z7C4cz2HkeY", "title": "Introduction to the income statement", "description": "The income statement, revenue, gross profit, operating profit, net income, ROA and ROE.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z7C4cz2HkeY.mp4/Z7C4cz2HkeY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z7C4cz2HkeY.mp4/Z7C4cz2HkeY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z7C4cz2HkeY.m3u8/Z7C4cz2HkeY.m3u8"}, "slug": "introduction-to-the-income-statement", "video_id": "Z7C4cz2HkeY", "youtube_id": "Z7C4cz2HkeY", "readable_id": "introduction-to-the-income-statement"}, "a19T5CX2b-g": {"duration": 673, "path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/oxygen-content/", "keywords": "", "id": "a19T5CX2b-g", "title": "Oxygen content", "description": "Learn how oxygen content (CaO2) is related to Hemoglobin concentration (Hb), oxygen saturation (SaO2), and the partial pressure of oxygen (PaO2). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a19T5CX2b-g.mp4/a19T5CX2b-g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a19T5CX2b-g.mp4/a19T5CX2b-g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a19T5CX2b-g.m3u8/a19T5CX2b-g.m3u8"}, "slug": "oxygen-content", "video_id": "a19T5CX2b-g", "youtube_id": "a19T5CX2b-g", "readable_id": "oxygen-content"}, "tp4I9J5viS4": {"duration": 770, "path": "khan/test-prep/mcat/behavior/behavior-and-genetics/adaptive-value-of-behavioral-traits/", "keywords": "", "id": "tp4I9J5viS4", "title": "Adaptive value of behavioral traits", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tp4I9J5viS4.mp4/tp4I9J5viS4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tp4I9J5viS4.mp4/tp4I9J5viS4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tp4I9J5viS4.m3u8/tp4I9J5viS4.m3u8"}, "slug": "adaptive-value-of-behavioral-traits", "video_id": "tp4I9J5viS4", "youtube_id": "tp4I9J5viS4", "readable_id": "adaptive-value-of-behavioral-traits"}, "aiwy2fNF_ZQ": {"duration": 332, "path": "khan/math/integral-calculus/sequences_series_approx_calc/power-series-algebra/rep-function-with-geometric-series/", "keywords": "", "id": "aiwy2fNF_ZQ", "title": "Representing function over interval of convergence", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aiwy2fNF_ZQ.mp4/aiwy2fNF_ZQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aiwy2fNF_ZQ.mp4/aiwy2fNF_ZQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aiwy2fNF_ZQ.m3u8/aiwy2fNF_ZQ.m3u8"}, "slug": "rep-function-with-geometric-series", "video_id": "aiwy2fNF_ZQ", "youtube_id": "aiwy2fNF_ZQ", "readable_id": "rep-function-with-geometric-series"}, "oT4F_reQXAU": {"duration": 371, "path": "khan/partner-content/big-history-project/life/what-is-life/bhp-how-did-life-begin-and-change/", "keywords": "", "id": "oT4F_reQXAU", "title": "How Did Life Begin and Change?", "description": "A closer look at the Goldilocks Conditions for life, and an animated voyage through evolution on Earth.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oT4F_reQXAU.mp4/oT4F_reQXAU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oT4F_reQXAU.mp4/oT4F_reQXAU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oT4F_reQXAU.m3u8/oT4F_reQXAU.m3u8"}, "slug": "bhp-how-did-life-begin-and-change", "video_id": "oT4F_reQXAU", "youtube_id": "oT4F_reQXAU", "readable_id": "bhp-how-did-life-begin-and-change"}, "hJOU3EK085M": {"duration": 196, "path": "khan/humanities/renaissance-reformation/northern/holbein/hans-holbein-the-younger-christina-of-denmark-duchess-of-milan-1538/", "keywords": "Hans Holbein, Holbein, Christina of Denmark, Duchess of Milan, 1538, National Gallery, London, German, Portrait, Henry VIII, English, nobility, painting, Google Art Project, Smarthistory, Khan Academy, OER, art history", "id": "hJOU3EK085M", "title": "Holbein the Younger, Christina of Denmark", "description": "Hans Holbein the Younger, Christina of Denmark, Duchess of Milan, 1538, oil on oak, 179.1 x 82.6 cm (The National Gallery, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hJOU3EK085M.mp4/hJOU3EK085M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hJOU3EK085M.mp4/hJOU3EK085M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hJOU3EK085M.m3u8/hJOU3EK085M.m3u8"}, "slug": "hans-holbein-the-younger-christina-of-denmark-duchess-of-milan-1538", "video_id": "hJOU3EK085M", "youtube_id": "hJOU3EK085M", "readable_id": "hans-holbein-the-younger-christina-of-denmark-duchess-of-milan-1538"}, "N0Ambe4FwQk": {"duration": 344, "path": "khan/humanities/becoming-modern/early-photography/early-photography-daguerreotypes/", "keywords": "", "id": "N0Ambe4FwQk", "title": "Early photography: making daguerreotypes", "description": "The daguerreotype is a one-of-a-kind, highly detailed photographic image on a polished copper plate coated with silver. It was introduced in 1839 and became the first popular photographic medium. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N0Ambe4FwQk.mp4/N0Ambe4FwQk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N0Ambe4FwQk.mp4/N0Ambe4FwQk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N0Ambe4FwQk.m3u8/N0Ambe4FwQk.m3u8"}, "slug": "early-photography-daguerreotypes", "video_id": "N0Ambe4FwQk", "youtube_id": "N0Ambe4FwQk", "readable_id": "early-photography-daguerreotypes"}, "vTYxY4IpmF8": {"duration": 621, "path": "khan/math/integral-calculus/sequences_series_approx_calc/estimating-infinite-series/alternating-series-remainder/", "keywords": "", "id": "vTYxY4IpmF8", "title": "Alternating series remainder", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vTYxY4IpmF8.mp4/vTYxY4IpmF8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vTYxY4IpmF8.mp4/vTYxY4IpmF8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vTYxY4IpmF8.m3u8/vTYxY4IpmF8.m3u8"}, "slug": "alternating-series-remainder", "video_id": "vTYxY4IpmF8", "youtube_id": "vTYxY4IpmF8", "readable_id": "alternating-series-remainder"}, "3A-nAw2tY_4": {"duration": 345, "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/historic-ad-as-scenarios/cost-push-inflation/", "keywords": "Cost, Push, Inflation", "id": "3A-nAw2tY_4", "title": "Cost-push inflation", "description": "How an oil shock can slow the economy while causing inflation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3A-nAw2tY_4.mp4/3A-nAw2tY_4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3A-nAw2tY_4.mp4/3A-nAw2tY_4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3A-nAw2tY_4.m3u8/3A-nAw2tY_4.m3u8"}, "slug": "cost-push-inflation", "video_id": "3A-nAw2tY_4", "youtube_id": "3A-nAw2tY_4", "readable_id": "cost-push-inflation"}, "VidnbCEOGdg": {"duration": 114, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/equations_beginner/solving-one-step-equations/", "keywords": "u10_L1_T1_we2, Solving, One-Step, Equations, CC_6_EE_2, CC_6_EE_2_c", "id": "VidnbCEOGdg", "title": "Example of solving a one-step equation", "description": "Learn how to solve this equation: a + 5 = 54", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VidnbCEOGdg.mp4/VidnbCEOGdg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VidnbCEOGdg.mp4/VidnbCEOGdg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VidnbCEOGdg.m3u8/VidnbCEOGdg.m3u8"}, "slug": "solving-one-step-equations", "video_id": "VidnbCEOGdg", "youtube_id": "VidnbCEOGdg", "readable_id": "solving-one-step-equations"}, "GFLkou8NvJo": {"duration": 319, "path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/wau-the-most-amazing-ancient-and-singular-number/", "keywords": "wau", "id": "GFLkou8NvJo", "title": "Wau: The most amazing, ancient, and singular number", "description": "What other amazing properties of Wau can you think of? Leave them in the comments.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GFLkou8NvJo.mp4/GFLkou8NvJo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GFLkou8NvJo.mp4/GFLkou8NvJo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GFLkou8NvJo.m3u8/GFLkou8NvJo.m3u8"}, "slug": "wau-the-most-amazing-ancient-and-singular-number", "video_id": "GFLkou8NvJo", "youtube_id": "GFLkou8NvJo", "readable_id": "wau-the-most-amazing-ancient-and-singular-number"}, "LWtXthfG9_M": {"duration": 874, "path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/hemoglobin/", "keywords": "hemoglobin, red, blood, cell, allosteric, cooperative, heme", "id": "LWtXthfG9_M", "title": "Hemoglobin", "description": "Hemoglobin and its role in the circulatory system", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LWtXthfG9_M.mp4/LWtXthfG9_M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LWtXthfG9_M.mp4/LWtXthfG9_M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LWtXthfG9_M.m3u8/LWtXthfG9_M.m3u8"}, "slug": "hemoglobin", "video_id": "LWtXthfG9_M", "youtube_id": "LWtXthfG9_M", "readable_id": "hemoglobin"}, "q0AkvTchhPI": {"duration": 674, "path": "khan/test-prep/gmat/problem-solving/gmat-math-42/", "keywords": "gmat, math, problem, solving", "id": "q0AkvTchhPI", "title": "GMAT: Math 42", "description": "205-206, pg. 180", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q0AkvTchhPI.mp4/q0AkvTchhPI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q0AkvTchhPI.mp4/q0AkvTchhPI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q0AkvTchhPI.m3u8/q0AkvTchhPI.m3u8"}, "slug": "gmat-math-42", "video_id": "q0AkvTchhPI", "youtube_id": "q0AkvTchhPI", "readable_id": "gmat-math-42"}, "frBJEYvyd-8": {"duration": 339, "path": "khan/math/algebra-basics/core-algebra-foundations/alg-basics-absolute-value/absolute-value-and-number-lines/", "keywords": "Absolute, Value, and, Number, Lines, CC_6_NS_7, CC_6_NS_7_a, CC_6_NS_7_b, CC_6_NS_7_c", "id": "frBJEYvyd-8", "title": "Absolute value and number lines", "description": "One easy way to think of absolute value is the distance it is from zero. To do that, a number line comes in handy. Watch and learn.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/frBJEYvyd-8.mp4/frBJEYvyd-8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/frBJEYvyd-8.mp4/frBJEYvyd-8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/frBJEYvyd-8.m3u8/frBJEYvyd-8.m3u8"}, "slug": "absolute-value-and-number-lines", "video_id": "frBJEYvyd-8", "youtube_id": "frBJEYvyd-8", "readable_id": "absolute-value-and-number-lines"}, "0nKP1FdSzEg": {"duration": 629, "path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/the-development-of-substance-use-why-do-people-use-legal-and-illegal-substances/", "keywords": "", "id": "0nKP1FdSzEg", "title": "The development of substance use - Why do people use legal and illegal substances?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0nKP1FdSzEg.mp4/0nKP1FdSzEg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0nKP1FdSzEg.mp4/0nKP1FdSzEg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0nKP1FdSzEg.m3u8/0nKP1FdSzEg.m3u8"}, "slug": "the-development-of-substance-use-why-do-people-use-legal-and-illegal-substances", "video_id": "0nKP1FdSzEg", "youtube_id": "0nKP1FdSzEg", "readable_id": "the-development-of-substance-use-why-do-people-use-legal-and-illegal-substances"}, "TDoGrbpJJ14": {"duration": 1106, "path": "khan/science/biology/her/tree-of-life/bacteria/", "keywords": "biology, bacteria", "id": "TDoGrbpJJ14", "title": "Bacteria", "description": "Introduction to bacteria", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TDoGrbpJJ14.mp4/TDoGrbpJJ14.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TDoGrbpJJ14.mp4/TDoGrbpJJ14.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TDoGrbpJJ14.m3u8/TDoGrbpJJ14.m3u8"}, "slug": "bacteria", "video_id": "TDoGrbpJJ14", "youtube_id": "TDoGrbpJJ14", "readable_id": "bacteria"}, "E8HagppxzxY": {"duration": 644, "path": "khan/test-prep/gmat/problem-solving/gmat-math-10/", "keywords": "gmat, math, problem, solving", "id": "E8HagppxzxY", "title": "GMAT: Math 10", "description": "55-60, pg. 159", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E8HagppxzxY.mp4/E8HagppxzxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E8HagppxzxY.mp4/E8HagppxzxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E8HagppxzxY.m3u8/E8HagppxzxY.m3u8"}, "slug": "gmat-math-10", "video_id": "E8HagppxzxY", "youtube_id": "E8HagppxzxY", "readable_id": "gmat-math-10"}, "f2ExnG0mGxg": {"duration": 101, "path": "khan/college-admissions/get-started/access-to-college/ss-cultural-obstacles/", "keywords": "", "id": "f2ExnG0mGxg", "title": "Student story: Overcoming cultural obstacles to college", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/f2ExnG0mGxg.mp4/f2ExnG0mGxg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/f2ExnG0mGxg.mp4/f2ExnG0mGxg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/f2ExnG0mGxg.m3u8/f2ExnG0mGxg.m3u8"}, "slug": "ss-cultural-obstacles", "video_id": "f2ExnG0mGxg", "youtube_id": "f2ExnG0mGxg", "readable_id": "ss-cultural-obstacles"}, "w_GZqhAR0I4": {"duration": 684, "path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-4-mark-to-model-vs-mark-to-market/", "keywords": "bailout, fed, treasury, insolvency, credit, crunch, accounting, model, mark, market", "id": "w_GZqhAR0I4", "title": "Bailout 4: Mark-to-model vs. mark-to-market", "description": "Different ways of accounting for an asset. Mark-to-model vs. mark-to-market.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w_GZqhAR0I4.mp4/w_GZqhAR0I4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w_GZqhAR0I4.mp4/w_GZqhAR0I4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w_GZqhAR0I4.m3u8/w_GZqhAR0I4.m3u8"}, "slug": "bailout-4-mark-to-model-vs-mark-to-market", "video_id": "w_GZqhAR0I4", "youtube_id": "w_GZqhAR0I4", "readable_id": "bailout-4-mark-to-model-vs-mark-to-market"}, "XspzfNSSqyk": {"duration": 322, "path": "khan/computing/computer-science/cryptography/comp-number-theory/trial-division-primality-test-using-a-sieve-prime-adventure-part-5/", "keywords": "trial division, primality test, sieve", "id": "XspzfNSSqyk", "title": "Primality test with sieve", "description": "An attempt at an optimal trial division primality test using the Sieve of Eratosthenes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XspzfNSSqyk.mp4/XspzfNSSqyk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XspzfNSSqyk.mp4/XspzfNSSqyk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XspzfNSSqyk.m3u8/XspzfNSSqyk.m3u8"}, "slug": "trial-division-primality-test-using-a-sieve-prime-adventure-part-5", "video_id": "XspzfNSSqyk", "youtube_id": "XspzfNSSqyk", "readable_id": "trial-division-primality-test-using-a-sieve-prime-adventure-part-5"}, "TQ8F_yPwqzA": {"duration": 352, "path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/brunelleschi-dome-of-the-cathedral-of-florence-1420-36/", "keywords": "art history, smarthistory, Brunelleschi, Duomo, Dome, Florence", "id": "TQ8F_yPwqzA", "title": "Brunelleschi, Dome of the Cathedral of Florence.", "description": "Brunelleschi, Dome of the Cathedral of Florence, 1420-36. \u00a0Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TQ8F_yPwqzA.mp4/TQ8F_yPwqzA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TQ8F_yPwqzA.mp4/TQ8F_yPwqzA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TQ8F_yPwqzA.m3u8/TQ8F_yPwqzA.m3u8"}, "slug": "brunelleschi-dome-of-the-cathedral-of-florence-1420-36", "video_id": "TQ8F_yPwqzA", "youtube_id": "TQ8F_yPwqzA", "readable_id": "brunelleschi-dome-of-the-cathedral-of-florence-1420-36"}, "_SpE4hQ8D_o": {"duration": 594, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/old-school-equations/taking-percentages/", "keywords": "Percent, math, algebra, khan, CC_6_RP_3_c, CC_7_RP_3", "id": "_SpE4hQ8D_o", "title": "Taking percentages", "description": "Taking a percentage of a number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_SpE4hQ8D_o.mp4/_SpE4hQ8D_o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_SpE4hQ8D_o.mp4/_SpE4hQ8D_o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_SpE4hQ8D_o.m3u8/_SpE4hQ8D_o.m3u8"}, "slug": "taking-percentages", "video_id": "_SpE4hQ8D_o", "youtube_id": "_SpE4hQ8D_o", "readable_id": "taking-percentages"}, "A_lV-XArVeE": {"duration": 622, "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/review-of-revenue-and-cost-graphs-for-a-monopoly-1/", "keywords": "", "id": "A_lV-XArVeE", "title": "Review of revenue and cost graphs for a monopoly", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A_lV-XArVeE.mp4/A_lV-XArVeE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A_lV-XArVeE.mp4/A_lV-XArVeE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A_lV-XArVeE.m3u8/A_lV-XArVeE.m3u8"}, "slug": "review-of-revenue-and-cost-graphs-for-a-monopoly-1", "video_id": "A_lV-XArVeE", "youtube_id": "A_lV-XArVeE", "readable_id": "review-of-revenue-and-cost-graphs-for-a-monopoly-1"}, "pJzmiywagfY": {"duration": 947, "path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/linear-algebra-cross-product-introduction/", "keywords": "Linear, Algebra, Vectors, cross, product", "id": "pJzmiywagfY", "title": "Cross product introduction", "description": "Introduction to the cross product", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pJzmiywagfY.mp4/pJzmiywagfY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pJzmiywagfY.mp4/pJzmiywagfY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pJzmiywagfY.m3u8/pJzmiywagfY.m3u8"}, "slug": "linear-algebra-cross-product-introduction", "video_id": "pJzmiywagfY", "youtube_id": "pJzmiywagfY", "readable_id": "linear-algebra-cross-product-introduction"}, "vCAFlt4pQSQ": {"duration": 509, "path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof/divergence-theorem-proof-part-1/", "keywords": "", "id": "vCAFlt4pQSQ", "title": "Divergence theorem proof (part 1)", "description": "Setting up the proof for the divergence theorem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vCAFlt4pQSQ.mp4/vCAFlt4pQSQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vCAFlt4pQSQ.mp4/vCAFlt4pQSQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vCAFlt4pQSQ.m3u8/vCAFlt4pQSQ.m3u8"}, "slug": "divergence-theorem-proof-part-1", "video_id": "vCAFlt4pQSQ", "youtube_id": "vCAFlt4pQSQ", "readable_id": "divergence-theorem-proof-part-1"}, "OJ-wajo6oa4": {"duration": 306, "path": "khan/math/arithmetic/addition-subtraction/sub_borrowing/regrouping-borrowing-twice-example/", "keywords": "", "id": "OJ-wajo6oa4", "title": "Regrouping (borrowing) twice example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OJ-wajo6oa4.mp4/OJ-wajo6oa4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OJ-wajo6oa4.mp4/OJ-wajo6oa4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OJ-wajo6oa4.m3u8/OJ-wajo6oa4.m3u8"}, "slug": "regrouping-borrowing-twice-example", "video_id": "OJ-wajo6oa4", "youtube_id": "OJ-wajo6oa4", "readable_id": "regrouping-borrowing-twice-example"}, "D5lZ3thuEeA": {"duration": 360, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons/scalene-isosceles-equilateral-acute-right-obtuse/", "keywords": "", "id": "D5lZ3thuEeA", "title": "Triangles: categorization by angle or equal sides.", "description": "Scalene, isosceles, equilateral, acute, right, obtuse. All are types of triangles but what makes them special depends on the method of categorization. Watch this outstanding explanation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D5lZ3thuEeA.mp4/D5lZ3thuEeA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D5lZ3thuEeA.mp4/D5lZ3thuEeA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D5lZ3thuEeA.m3u8/D5lZ3thuEeA.m3u8"}, "slug": "scalene-isosceles-equilateral-acute-right-obtuse", "video_id": "D5lZ3thuEeA", "youtube_id": "D5lZ3thuEeA", "readable_id": "scalene-isosceles-equilateral-acute-right-obtuse"}, "8-5DTsl1V5k": {"duration": 510, "path": "khan/humanities/art-1010/beginners-guide-20-21/representation-abstraction-looking-at-millais-and-newman/", "keywords": "art history, khan academy, smarthistory, abstract art, abstraction, illusion, modern art, art", "id": "8-5DTsl1V5k", "title": "Representation and abstraction: Millais's Ophelia and Newman's Vir Heroicus Sublimis", "description": "Representation & Abstraction: Looking at Millais and Newman\nJohn Everett Millais, Ophelia, 1851-2 (Tate Britain) and Barnett Newman, Vir Heroicus Sublimus, 1950-51 (MoMA)\n\nA conversation with Sal Khan, Beth Harris & Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8-5DTsl1V5k.mp4/8-5DTsl1V5k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8-5DTsl1V5k.mp4/8-5DTsl1V5k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8-5DTsl1V5k.m3u8/8-5DTsl1V5k.m3u8"}, "slug": "representation-abstraction-looking-at-millais-and-newman", "video_id": "8-5DTsl1V5k", "youtube_id": "8-5DTsl1V5k", "readable_id": "representation-abstraction-looking-at-millais-and-newman"}, "c7ByaI3T7Dc": {"duration": 607, "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/partial-derivatives-of-vector-valued-functions/", "keywords": "Partial, Derivatives, of, Vector-Valued, Functions", "id": "c7ByaI3T7Dc", "title": "Partial derivatives of vector-valued functions", "description": "Partial Derivatives of Vector-Valued Functions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/c7ByaI3T7Dc.mp4/c7ByaI3T7Dc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/c7ByaI3T7Dc.mp4/c7ByaI3T7Dc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/c7ByaI3T7Dc.m3u8/c7ByaI3T7Dc.m3u8"}, "slug": "partial-derivatives-of-vector-valued-functions", "video_id": "c7ByaI3T7Dc", "youtube_id": "c7ByaI3T7Dc", "readable_id": "partial-derivatives-of-vector-valued-functions"}, "GB9Rqsah2gs": {"duration": 211, "path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/radius-change-impact/", "keywords": "", "id": "GB9Rqsah2gs", "title": "Impact of a radius change on the area of a circle", "description": "If we change the radius of a circle, how does the circumference and area change?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GB9Rqsah2gs.mp4/GB9Rqsah2gs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GB9Rqsah2gs.mp4/GB9Rqsah2gs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GB9Rqsah2gs.m3u8/GB9Rqsah2gs.m3u8"}, "slug": "radius-change-impact", "video_id": "GB9Rqsah2gs", "youtube_id": "GB9Rqsah2gs", "readable_id": "radius-change-impact"}, "wDdIwv7H3Sg": {"duration": 200, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/richard-branson/kauffman-richard-branson/", "keywords": "", "id": "wDdIwv7H3Sg", "title": "Richard Branson - Chairman of the Virgin Group", "description": "Richard Branson, Chairman of the Virgin Group, shares his story as a successful entrepreneur with a diverse portfolio.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wDdIwv7H3Sg.mp4/wDdIwv7H3Sg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wDdIwv7H3Sg.mp4/wDdIwv7H3Sg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wDdIwv7H3Sg.m3u8/wDdIwv7H3Sg.m3u8"}, "slug": "kauffman-richard-branson", "video_id": "wDdIwv7H3Sg", "youtube_id": "wDdIwv7H3Sg", "readable_id": "kauffman-richard-branson"}, "vhY3zQ6h49o": {"duration": 81, "path": "khan/college-admissions/get-started/access-to-college/ss-lack-of-high-school-support-obstacle/", "keywords": "", "id": "vhY3zQ6h49o", "title": "Student story: Overcoming lack of high school support as an obstacle to college", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vhY3zQ6h49o.mp4/vhY3zQ6h49o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vhY3zQ6h49o.mp4/vhY3zQ6h49o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vhY3zQ6h49o.m3u8/vhY3zQ6h49o.m3u8"}, "slug": "ss-lack-of-high-school-support-obstacle", "video_id": "vhY3zQ6h49o", "youtube_id": "vhY3zQ6h49o", "readable_id": "ss-lack-of-high-school-support-obstacle"}, "dCSH7ok7ejI": {"duration": 195, "path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/hadrian-building-the-wall/", "keywords": "", "id": "dCSH7ok7ejI", "title": "Hadrian, Building the wall", "description": "In 122 C.E. Hadrian ordered a mighty frontier system to be built across the north of Britain. The result was Hadrian's Wall, a 73 mile barrier stretching from the Solway Firth on the west coast of Britain to the River Tyne on the east coast.\u00a0\u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dCSH7ok7ejI.mp4/dCSH7ok7ejI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dCSH7ok7ejI.mp4/dCSH7ok7ejI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dCSH7ok7ejI.m3u8/dCSH7ok7ejI.m3u8"}, "slug": "hadrian-building-the-wall", "video_id": "dCSH7ok7ejI", "youtube_id": "dCSH7ok7ejI", "readable_id": "hadrian-building-the-wall"}, "0lSTXtwPuOU": {"duration": 145, "path": "khan/math/early-math/cc-early-math-geometry-topic/cc-early-math-fractions-of-shapes/halves-and-fourths/", "keywords": "", "id": "0lSTXtwPuOU", "title": "Halves and fourths", "description": "Learn how to divide shapes into two or four equal sections.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0lSTXtwPuOU.mp4/0lSTXtwPuOU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0lSTXtwPuOU.mp4/0lSTXtwPuOU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0lSTXtwPuOU.m3u8/0lSTXtwPuOU.m3u8"}, "slug": "halves-and-fourths", "video_id": "0lSTXtwPuOU", "youtube_id": "0lSTXtwPuOU", "readable_id": "halves-and-fourths"}, "391txUI76gM": {"duration": 517, "path": "khan/science/physics/newton-gravitation/gravity-newtonian/introduction-to-newton-s-law-of-gravitation/", "keywords": "physics, newton, gravity, gravitation, force", "id": "391txUI76gM", "title": "Introduction to Newton's law of gravitation", "description": "A little bit on gravity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/391txUI76gM.mp4/391txUI76gM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/391txUI76gM.mp4/391txUI76gM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/391txUI76gM.m3u8/391txUI76gM.m3u8"}, "slug": "introduction-to-newton-s-law-of-gravitation", "video_id": "391txUI76gM", "youtube_id": "391txUI76gM", "readable_id": "introduction-to-newton-s-law-of-gravitation"}, "iV6_wTrkd70": {"duration": 753, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/leonardo-da-vinci-last-supper-1495-98/", "keywords": "Leonardo, Last Supper Smarthistory, Art History, Milan", "id": "iV6_wTrkd70", "title": "Leonardo, Last Supper", "description": "Leonardo da Vinci, Last Supper, oil, tempera, fresco, 1495-98 (Santa Maria delle Grazie, Milan) Speakers: Dr. Beth Harris, Dr. Steven Zucker http://smarthistory.org/leonardo-last-supper.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iV6_wTrkd70.mp4/iV6_wTrkd70.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iV6_wTrkd70.mp4/iV6_wTrkd70.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iV6_wTrkd70.m3u8/iV6_wTrkd70.m3u8"}, "slug": "leonardo-da-vinci-last-supper-1495-98", "video_id": "iV6_wTrkd70", "youtube_id": "iV6_wTrkd70", "readable_id": "leonardo-da-vinci-last-supper-1495-98"}, "J33nVRyTeyU": {"duration": 861, "path": "khan/humanities/history/history-survey/us-history/20th-century-capitalism-and-regulation-in-the-united-states/", "keywords": "capitalism, cycles, regulation, government", "id": "J33nVRyTeyU", "title": "20th Century capitalism and regulation in the United States", "description": "Overview of cycles of regulation, de-regulation and government in 20th century US capitalism", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J33nVRyTeyU.mp4/J33nVRyTeyU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J33nVRyTeyU.mp4/J33nVRyTeyU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J33nVRyTeyU.m3u8/J33nVRyTeyU.m3u8"}, "slug": "20th-century-capitalism-and-regulation-in-the-united-states", "video_id": "J33nVRyTeyU", "youtube_id": "J33nVRyTeyU", "readable_id": "20th-century-capitalism-and-regulation-in-the-united-states"}, "IOzZVmgK3IM": {"duration": 662, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-6-bank-notes-and-checks/", "keywords": "banking, currency, checks, gold, finance", "id": "IOzZVmgK3IM", "title": "Banking 6: Bank notes and checks", "description": "More on how bank notes and checks can be used.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IOzZVmgK3IM.mp4/IOzZVmgK3IM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IOzZVmgK3IM.mp4/IOzZVmgK3IM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IOzZVmgK3IM.m3u8/IOzZVmgK3IM.m3u8"}, "slug": "banking-6-bank-notes-and-checks", "video_id": "IOzZVmgK3IM", "youtube_id": "IOzZVmgK3IM", "readable_id": "banking-6-bank-notes-and-checks"}, "_uDb0ZdGb8w": {"duration": 253, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/lower-bound-on-forward-settlement-price/", "keywords": "Lower, Bound, on, Forward, Settlement, Price", "id": "_uDb0ZdGb8w", "title": "Lower bound on forward settlement price", "description": "Lower Bound on Forward Settlement Price", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_uDb0ZdGb8w.mp4/_uDb0ZdGb8w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_uDb0ZdGb8w.mp4/_uDb0ZdGb8w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_uDb0ZdGb8w.m3u8/_uDb0ZdGb8w.m3u8"}, "slug": "lower-bound-on-forward-settlement-price", "video_id": "_uDb0ZdGb8w", "youtube_id": "_uDb0ZdGb8w", "readable_id": "lower-bound-on-forward-settlement-price"}, "WV3MXLAfIi4": {"duration": 246, "path": "khan/humanities/art-americas/us-art-19c/realism-us/winslow-homer-the-life-line-1884/", "keywords": "Winslow Homer, Homer, The Life Line, Life Line, 1884, Philadelphia Museum of Art, Philadelphia, Studio Building, American, painting, rescue, art history, art, Khan Academy, Google Art Project, Smarthistory, OER", "id": "WV3MXLAfIi4", "title": "Homer, The Life Line", "description": "Winslow Homer, The Life Line, 1884, oil on canvas, 28-5/8 x 44-3/4 inches / 72.7 x 113.7 cm (Philadelphia Museum of Art). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WV3MXLAfIi4.mp4/WV3MXLAfIi4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WV3MXLAfIi4.mp4/WV3MXLAfIi4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WV3MXLAfIi4.m3u8/WV3MXLAfIi4.m3u8"}, "slug": "winslow-homer-the-life-line-1884", "video_id": "WV3MXLAfIi4", "youtube_id": "WV3MXLAfIi4", "readable_id": "winslow-homer-the-life-line-1884"}, "FksgVpM_iXs": {"duration": 416, "path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/non-linear-systems-of-equations-3/", "keywords": "U10_L2_T2_we3, Non-Linear, Systems, of, Equations, CC_39336_A-REI_10, CC_39336_F-IF_7_a", "id": "FksgVpM_iXs", "title": "Non-linear systems of equations 3", "description": "Non-Linear Systems of Equations 3", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FksgVpM_iXs.mp4/FksgVpM_iXs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FksgVpM_iXs.mp4/FksgVpM_iXs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FksgVpM_iXs.m3u8/FksgVpM_iXs.m3u8"}, "slug": "non-linear-systems-of-equations-3", "video_id": "FksgVpM_iXs", "youtube_id": "FksgVpM_iXs", "readable_id": "non-linear-systems-of-equations-3"}, "DtlFQ_nNaQM": {"duration": 156, "path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/review-of-china-us-currency-situation/", "keywords": "Review, of, China, US, currency, situation", "id": "DtlFQ_nNaQM", "title": "Review of China US currency situation", "description": "Review of China US currency situation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DtlFQ_nNaQM.mp4/DtlFQ_nNaQM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DtlFQ_nNaQM.mp4/DtlFQ_nNaQM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DtlFQ_nNaQM.m3u8/DtlFQ_nNaQM.m3u8"}, "slug": "review-of-china-us-currency-situation", "video_id": "DtlFQ_nNaQM", "youtube_id": "DtlFQ_nNaQM", "readable_id": "review-of-china-us-currency-situation"}, "dXB3cUGnaxQ": {"duration": 623, "path": "khan/math/probability/statistics-inferential/chi-square/chi-square-distribution-introduction/", "keywords": "Chi-Square, Distribution, Introduction, Chi-Squared", "id": "dXB3cUGnaxQ", "title": "Chi-square distribution introduction", "description": "Chi-Square Distribution Introduction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dXB3cUGnaxQ.mp4/dXB3cUGnaxQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dXB3cUGnaxQ.mp4/dXB3cUGnaxQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dXB3cUGnaxQ.m3u8/dXB3cUGnaxQ.m3u8"}, "slug": "chi-square-distribution-introduction", "video_id": "dXB3cUGnaxQ", "youtube_id": "dXB3cUGnaxQ", "readable_id": "chi-square-distribution-introduction"}, "_Lj_F9GADa4": {"duration": 646, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/effects-of-axon-diameter-and-myelination/", "keywords": "", "id": "_Lj_F9GADa4", "title": "Effects of axon diameter and myelination", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_Lj_F9GADa4.mp4/_Lj_F9GADa4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_Lj_F9GADa4.mp4/_Lj_F9GADa4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_Lj_F9GADa4.m3u8/_Lj_F9GADa4.m3u8"}, "slug": "effects-of-axon-diameter-and-myelination", "video_id": "_Lj_F9GADa4", "youtube_id": "_Lj_F9GADa4", "readable_id": "effects-of-axon-diameter-and-myelination"}, "CyDtzMQbDfQ": {"duration": 212, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/graciela-iturbide/", "keywords": "Tate", "id": "CyDtzMQbDfQ", "title": "Graciela Iturbide", "description": "This video brought to you by Tate.org.uk\n\nWhether capturing images of Frida Kahlo's house, wild dogs in India, or the Seri people in Mexico's Sonoran desert, Mexican photographer Graciela Iturbide presents the world in black in white, or as she describes it, as \"an abstraction of the mind.\" Travelling with her camera every day and often living with her subjects for months, Iturbide says that her process is similar to that of a travel photographer, except that she only shoots \"what surprises and provokes an emotion that I want to capture.\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CyDtzMQbDfQ.mp4/CyDtzMQbDfQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CyDtzMQbDfQ.mp4/CyDtzMQbDfQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CyDtzMQbDfQ.m3u8/CyDtzMQbDfQ.m3u8"}, "slug": "graciela-iturbide", "video_id": "CyDtzMQbDfQ", "youtube_id": "CyDtzMQbDfQ", "readable_id": "graciela-iturbide"}, "m2DBfaL7Zo4": {"duration": 775, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments/harp-interview-demo/", "keywords": "", "id": "m2DBfaL7Zo4", "title": "Harp: Interview and demonstration with principal Nancy Allen", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m2DBfaL7Zo4.mp4/m2DBfaL7Zo4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m2DBfaL7Zo4.mp4/m2DBfaL7Zo4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m2DBfaL7Zo4.m3u8/m2DBfaL7Zo4.m3u8"}, "slug": "harp-interview-demo", "video_id": "m2DBfaL7Zo4", "youtube_id": "m2DBfaL7Zo4", "readable_id": "harp-interview-demo"}, "oTIu12zqf04": {"duration": 296, "path": "khan/partner-content/wi-phi/value-theory-1/what-are-public-goods/", "keywords": "Philosophy (Field Of Study),Rational Choice Theory (Field Of Study),public goods,economics,Public Good,Khan Academy (Nonprofit Organization),wireless philosophy,wi-phi,University Of North Carolina At Chapel Hill (College/University),Duke University (College/University),Western Philosophy (Field Of Study),jonathan anomaly,Political Philosophy (Field Of Study),wiphi", "id": "oTIu12zqf04", "title": "Political: What are Public Goods?", "description": "In this video, Professor Jonathan Anomaly (Duke and UNC \u2013 Chapel Hill) discusses public goods, which are goods that are jointly consumed, so that they are available to everyone if they are available to anyone. Public goods often lead to unexploited gains from trade, and are frequently invoked to justify why we have a state to perform basic functions like defense, property adjudication, and the regulation of pollution.\n\nSpeaker: Dr.\u00a0Jonathan Anomaly, Lecturer/Research Assistant Professor, Duke University and University of North Carolina at Chapel Hill", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oTIu12zqf04.mp4/oTIu12zqf04.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oTIu12zqf04.mp4/oTIu12zqf04.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oTIu12zqf04.m3u8/oTIu12zqf04.m3u8"}, "slug": "what-are-public-goods", "video_id": "oTIu12zqf04", "youtube_id": "oTIu12zqf04", "readable_id": "what-are-public-goods"}, "SBqnRja4CW4": {"duration": 501, "path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/we-amplitude-and-period/", "keywords": "cos, amplitude, period, trig", "id": "SBqnRja4CW4", "title": "Example: Amplitude and period", "description": "Determining the amplitude and period of a trig function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SBqnRja4CW4.mp4/SBqnRja4CW4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SBqnRja4CW4.mp4/SBqnRja4CW4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SBqnRja4CW4.m3u8/SBqnRja4CW4.m3u8"}, "slug": "we-amplitude-and-period", "video_id": "SBqnRja4CW4", "youtube_id": "SBqnRja4CW4", "readable_id": "we-amplitude-and-period"}, "kkUvU-elGtw": {"duration": 471, "path": "khan/test-prep/mcat/physical-processes/gas-phase/pressure-and-the-simple-mercury-barometer/", "keywords": "", "id": "kkUvU-elGtw", "title": "Pressure and the simple mercury barometer", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kkUvU-elGtw.mp4/kkUvU-elGtw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kkUvU-elGtw.mp4/kkUvU-elGtw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kkUvU-elGtw.m3u8/kkUvU-elGtw.m3u8"}, "slug": "pressure-and-the-simple-mercury-barometer", "video_id": "kkUvU-elGtw", "youtube_id": "kkUvU-elGtw", "readable_id": "pressure-and-the-simple-mercury-barometer"}, "j0xQmCPXTvY": {"duration": 700, "path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/electron-affinity/", "keywords": "", "id": "j0xQmCPXTvY", "title": "Electron affinity", "description": "Definition of electron affinity, and comparing electron affinities of LI, Be, and B", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j0xQmCPXTvY.mp4/j0xQmCPXTvY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j0xQmCPXTvY.mp4/j0xQmCPXTvY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j0xQmCPXTvY.m3u8/j0xQmCPXTvY.m3u8"}, "slug": "electron-affinity", "video_id": "j0xQmCPXTvY", "youtube_id": "j0xQmCPXTvY", "readable_id": "electron-affinity"}, "ZNtzWpU80-0": {"duration": 588, "path": "khan/math/algebra2/polynomial-and-rational/quad_ineq/quadratic-inequalities/", "keywords": "quadratic, factoring, inequality, algebra", "id": "ZNtzWpU80-0", "title": "Quadratic inequalities", "description": "Solving quadratic inequalities using factoring", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZNtzWpU80-0.mp4/ZNtzWpU80-0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZNtzWpU80-0.mp4/ZNtzWpU80-0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZNtzWpU80-0.m3u8/ZNtzWpU80-0.m3u8"}, "slug": "quadratic-inequalities", "video_id": "ZNtzWpU80-0", "youtube_id": "ZNtzWpU80-0", "readable_id": "quadratic-inequalities"}, "uaPm3Tpuxbc": {"duration": 83, "path": "khan/math/algebra/algebra-functions/evaluating-functions/evaluating-a-function-expression/", "keywords": "", "id": "uaPm3Tpuxbc", "title": "How to evaluate an expression that contains function notation (example)", "description": "Sal evaluates -2*f(-6)+g(1) given the graphs of f and g.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uaPm3Tpuxbc.mp4/uaPm3Tpuxbc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uaPm3Tpuxbc.mp4/uaPm3Tpuxbc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uaPm3Tpuxbc.m3u8/uaPm3Tpuxbc.m3u8"}, "slug": "evaluating-a-function-expression", "video_id": "uaPm3Tpuxbc", "youtube_id": "uaPm3Tpuxbc", "readable_id": "evaluating-a-function-expression"}, "DAvEI0rLrAw": {"duration": 183, "path": "khan/science/discoveries-projects/reverse-engin/digital_camera/what-is-inside-a-digital-camera-2-of-2/", "keywords": "flash memory, CCD, charged coupled device, lens, cost reduction, revision number, plastic ", "id": "DAvEI0rLrAw", "title": "What is inside a digital camera? (2 of 2)", "description": "In this video we compare different revisions of the same digital camera.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DAvEI0rLrAw.mp4/DAvEI0rLrAw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DAvEI0rLrAw.mp4/DAvEI0rLrAw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DAvEI0rLrAw.m3u8/DAvEI0rLrAw.m3u8"}, "slug": "what-is-inside-a-digital-camera-2-of-2", "video_id": "DAvEI0rLrAw", "youtube_id": "DAvEI0rLrAw", "readable_id": "what-is-inside-a-digital-camera-2-of-2"}, "9rrEHyBZ5MU": {"duration": 133, "path": "khan/partner-content/pixar/crowds/crowds-1/combinatorics5/", "keywords": "", "id": "9rrEHyBZ5MU", "title": "5. Casting challenge", "description": "Now it's your turn to drive. In this video we'll present you with a casting challenge to complete using everything we've learned so far.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9rrEHyBZ5MU.mp4/9rrEHyBZ5MU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9rrEHyBZ5MU.mp4/9rrEHyBZ5MU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9rrEHyBZ5MU.m3u8/9rrEHyBZ5MU.m3u8"}, "slug": "combinatorics5", "video_id": "9rrEHyBZ5MU", "youtube_id": "9rrEHyBZ5MU", "readable_id": "combinatorics5"}, "LtpXvUCrgrM": {"duration": 427, "path": "khan/math/algebra/two-var-linear-equations-and-intro-to-functions/point-slope/point-slope-and-slope-intercept-form-from-two-points/", "keywords": "", "id": "LtpXvUCrgrM", "title": "Point-slope and slope-intercept form from two points", "description": "Point-slope and slope-intercept form from two points", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LtpXvUCrgrM.mp4/LtpXvUCrgrM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LtpXvUCrgrM.mp4/LtpXvUCrgrM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LtpXvUCrgrM.m3u8/LtpXvUCrgrM.m3u8"}, "slug": "point-slope-and-slope-intercept-form-from-two-points", "video_id": "LtpXvUCrgrM", "youtube_id": "LtpXvUCrgrM", "readable_id": "point-slope-and-slope-intercept-form-from-two-points"}, "jO1wp-Bx-WE": {"duration": 221, "path": "khan/humanities/global-culture/identity-body/identity-body-united-states/hesse-untitled-1966/", "keywords": "Eva Hesse, Smarthistory, Art History, Modern Art, MoMA", "id": "jO1wp-Bx-WE", "title": "Hesse, Untitled", "description": "Eva Hesse, Untitled, enamel paint, string, papier-m\u00e2ch\u00e9, elastic cord, 1966 (MoMA) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jO1wp-Bx-WE.mp4/jO1wp-Bx-WE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jO1wp-Bx-WE.mp4/jO1wp-Bx-WE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jO1wp-Bx-WE.m3u8/jO1wp-Bx-WE.m3u8"}, "slug": "hesse-untitled-1966", "video_id": "jO1wp-Bx-WE", "youtube_id": "jO1wp-Bx-WE", "readable_id": "hesse-untitled-1966"}, "h05d7Mbd3UI": {"duration": 218, "path": "khan/humanities/history/1600s-1800s/benjamin-franklin/franklin-civic-leader/", "keywords": "", "id": "h05d7Mbd3UI", "title": "Benjamin Franklin the civic leader", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson discuss Benjamin Franklin as a civic leader.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h05d7Mbd3UI.mp4/h05d7Mbd3UI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h05d7Mbd3UI.mp4/h05d7Mbd3UI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h05d7Mbd3UI.m3u8/h05d7Mbd3UI.m3u8"}, "slug": "franklin-civic-leader", "video_id": "h05d7Mbd3UI", "youtube_id": "h05d7Mbd3UI", "readable_id": "franklin-civic-leader"}, "U3JxFFdKCKM": {"duration": 324, "path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/applying-radical-equations-1/", "keywords": "U07_L3_T3_we1, Applying, Radical, Equations, CC_39336_A-REI_2", "id": "U3JxFFdKCKM", "title": "Applying radical equations 1", "description": "Applying Radical Equations 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U3JxFFdKCKM.mp4/U3JxFFdKCKM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U3JxFFdKCKM.mp4/U3JxFFdKCKM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U3JxFFdKCKM.m3u8/U3JxFFdKCKM.m3u8"}, "slug": "applying-radical-equations-1", "video_id": "U3JxFFdKCKM", "youtube_id": "U3JxFFdKCKM", "readable_id": "applying-radical-equations-1"}, "hA5jddDYcyg": {"duration": 1084, "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/vapor-pressure/", "keywords": "chemistry, vapor, pressure", "id": "hA5jddDYcyg", "title": "Vapor pressure", "description": "Vapor pressure, volatility, and evaporation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hA5jddDYcyg.mp4/hA5jddDYcyg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hA5jddDYcyg.mp4/hA5jddDYcyg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hA5jddDYcyg.m3u8/hA5jddDYcyg.m3u8"}, "slug": "vapor-pressure", "video_id": "hA5jddDYcyg", "youtube_id": "hA5jddDYcyg", "readable_id": "vapor-pressure"}, "BI_jmI4xRus": {"duration": 608, "path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-special-products/", "keywords": "Factoring, Special, Products, CC_39336_A-REI_4_b, CC_39336_A-SSE_3_a, CC_39336_F-IF_8_a", "id": "BI_jmI4xRus", "title": "Factoring special products", "description": "Factoring Special Products", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BI_jmI4xRus.mp4/BI_jmI4xRus.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BI_jmI4xRus.mp4/BI_jmI4xRus.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BI_jmI4xRus.m3u8/BI_jmI4xRus.m3u8"}, "slug": "factoring-special-products", "video_id": "BI_jmI4xRus", "youtube_id": "BI_jmI4xRus", "readable_id": "factoring-special-products"}, "LRmwUsxNSL0": {"duration": 438, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic/detectable-civilizations-in-our-galaxy-3/", "keywords": "star, formation, cosmology", "id": "LRmwUsxNSL0", "title": "Detectable civilizations in our galaxy 3", "description": "Reconciling with the traditional Drake Equation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LRmwUsxNSL0.mp4/LRmwUsxNSL0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LRmwUsxNSL0.mp4/LRmwUsxNSL0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LRmwUsxNSL0.m3u8/LRmwUsxNSL0.m3u8"}, "slug": "detectable-civilizations-in-our-galaxy-3", "video_id": "LRmwUsxNSL0", "youtube_id": "LRmwUsxNSL0", "readable_id": "detectable-civilizations-in-our-galaxy-3"}, "o6oyCeYQWPE": {"duration": 343, "path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/persuasion-attitude-change-and-the-elaboration-likelihood-model/", "keywords": "", "id": "o6oyCeYQWPE", "title": "Persuasion, attitude change, and the elaboration likelihood model", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o6oyCeYQWPE.mp4/o6oyCeYQWPE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o6oyCeYQWPE.mp4/o6oyCeYQWPE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o6oyCeYQWPE.m3u8/o6oyCeYQWPE.m3u8"}, "slug": "persuasion-attitude-change-and-the-elaboration-likelihood-model", "video_id": "o6oyCeYQWPE", "youtube_id": "o6oyCeYQWPE", "readable_id": "persuasion-attitude-change-and-the-elaboration-likelihood-model"}, "Kq0Er6JBMmc": {"duration": 503, "path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-planning-and-propulsion/", "keywords": "Planning, brainstorming, voltage, motor, propulsion techniques, key components, robotics", "id": "Kq0Er6JBMmc", "title": "Planning and propulsion", "description": "The video covers the first stages of idea generation for Bit-zee and how to make Bit-zee move.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Kq0Er6JBMmc.mp4/Kq0Er6JBMmc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Kq0Er6JBMmc.mp4/Kq0Er6JBMmc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Kq0Er6JBMmc.m3u8/Kq0Er6JBMmc.m3u8"}, "slug": "bit-zee-planning-and-propulsion", "video_id": "Kq0Er6JBMmc", "youtube_id": "Kq0Er6JBMmc", "readable_id": "bit-zee-planning-and-propulsion"}, "BlnUNmfGn7I": {"duration": 372, "path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/genetic-recombination-1/", "keywords": "", "id": "BlnUNmfGn7I", "title": "Genetic recombination 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BlnUNmfGn7I.mp4/BlnUNmfGn7I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BlnUNmfGn7I.mp4/BlnUNmfGn7I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BlnUNmfGn7I.m3u8/BlnUNmfGn7I.m3u8"}, "slug": "genetic-recombination-1", "video_id": "BlnUNmfGn7I", "youtube_id": "BlnUNmfGn7I", "readable_id": "genetic-recombination-1"}, "HIu1S2Wsso8": {"duration": 65, "path": "khan/computing/computer-science/cryptography/comp-number-theory/primality-test-challenge/", "keywords": "prime numbers", "id": "HIu1S2Wsso8", "title": "Primality test challenge", "description": "How can a machine tell us if a number is prime?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HIu1S2Wsso8.mp4/HIu1S2Wsso8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HIu1S2Wsso8.mp4/HIu1S2Wsso8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HIu1S2Wsso8.m3u8/HIu1S2Wsso8.m3u8"}, "slug": "primality-test-challenge", "video_id": "HIu1S2Wsso8", "youtube_id": "HIu1S2Wsso8", "readable_id": "primality-test-challenge"}, "4NYF_Y3rTbk": {"duration": 27, "path": "khan/computing/computer-programming/html-js-jquery/jquery-intro/jquery-meet-the-inventor/", "keywords": "JQuery (Software),JavaScript (Programming Language)", "id": "4NYF_Y3rTbk", "title": "From the inventor: Welcome!", "description": "Meet John Resig, the developer that invented jQuery and now works as an engineer at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4NYF_Y3rTbk.mp4/4NYF_Y3rTbk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4NYF_Y3rTbk.mp4/4NYF_Y3rTbk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4NYF_Y3rTbk.m3u8/4NYF_Y3rTbk.m3u8"}, "slug": "jquery-meet-the-inventor", "video_id": "4NYF_Y3rTbk", "youtube_id": "4NYF_Y3rTbk", "readable_id": "jquery-meet-the-inventor"}, "-hFAKd923eI": {"duration": 432, "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies/sscc-blended-kippteach/", "keywords": "", "id": "-hFAKd923eI", "title": "Case study #2: Teaching in a Station Rotation model at KIPP LA", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-hFAKd923eI.mp4/-hFAKd923eI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-hFAKd923eI.mp4/-hFAKd923eI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-hFAKd923eI.m3u8/-hFAKd923eI.m3u8"}, "slug": "sscc-blended-kippteach", "video_id": "-hFAKd923eI", "youtube_id": "-hFAKd923eI", "readable_id": "sscc-blended-kippteach"}, "X872rmThCF8": {"duration": 254, "path": "khan/humanities/ancient-art-civilizations/greek-art/classical/caryatid-ionic-column-erechtheion-421-407-b-c-e/", "keywords": "athens, acropolis, erectheion, elgin marbles, british museum, Parthenon", "id": "X872rmThCF8", "title": "Caryatid and column from the Erechtheion", "description": "Caryatid (South Porch) and Ionic Column (North Porch), Erechtheion on the Acropolis, Athens, marble, 421-407 B.C.E., Classical Period (British Museum, London); Mnesicles may have been the architect. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X872rmThCF8.mp4/X872rmThCF8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X872rmThCF8.mp4/X872rmThCF8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X872rmThCF8.m3u8/X872rmThCF8.m3u8"}, "slug": "caryatid-ionic-column-erechtheion-421-407-b-c-e", "video_id": "X872rmThCF8", "youtube_id": "X872rmThCF8", "readable_id": "caryatid-ionic-column-erechtheion-421-407-b-c-e"}, "XhSsMjuzt9Y": {"duration": 284, "path": "khan/test-prep/mcat/biomolecules/gene-control/tumor-suppressors/", "keywords": "", "id": "XhSsMjuzt9Y", "title": "Tumor suppressors", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XhSsMjuzt9Y.mp4/XhSsMjuzt9Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XhSsMjuzt9Y.mp4/XhSsMjuzt9Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XhSsMjuzt9Y.m3u8/XhSsMjuzt9Y.m3u8"}, "slug": "tumor-suppressors", "video_id": "XhSsMjuzt9Y", "youtube_id": "XhSsMjuzt9Y", "readable_id": "tumor-suppressors"}, "txHg9ItLH3Y": {"duration": 103, "path": "khan/humanities/art-1010/pop/moma-rosenquist-f111/", "keywords": "", "id": "txHg9ItLH3Y", "title": "James Rosenquist, \"F-111,\" 1964-65", "description": "\u200bJames Rosenquist said about his 1964 painting, F111, \"a multiplicity of ideas caused its existence.\" To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/txHg9ItLH3Y.mp4/txHg9ItLH3Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/txHg9ItLH3Y.mp4/txHg9ItLH3Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/txHg9ItLH3Y.m3u8/txHg9ItLH3Y.m3u8"}, "slug": "moma-rosenquist-f111", "video_id": "txHg9ItLH3Y", "youtube_id": "txHg9ItLH3Y", "readable_id": "moma-rosenquist-f111"}, "klcIklsWzrY": {"duration": 252, "path": "khan/computing/computer-science/cryptography/comp-number-theory/sieve-of-eratosthenes-prime-adventure-part-4/", "keywords": "sieve, primality test, prime numbers, prime, eratosthenes", "id": "klcIklsWzrY", "title": "Sieve of Eratosthenes", "description": "Sieve of Eratosthenes allows us to generate a list of primes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/klcIklsWzrY.mp4/klcIklsWzrY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/klcIklsWzrY.mp4/klcIklsWzrY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/klcIklsWzrY.m3u8/klcIklsWzrY.m3u8"}, "slug": "sieve-of-eratosthenes-prime-adventure-part-4", "video_id": "klcIklsWzrY", "youtube_id": "klcIklsWzrY", "readable_id": "sieve-of-eratosthenes-prime-adventure-part-4"}, "4ve7OaCnDLs": {"duration": 146, "path": "khan/math/pre-algebra/negatives-absolute-value-pre-alg/mult-div-negatives-pre-alg/multiplying-negative-real-numbers/", "keywords": "U09_L2_T4_we1, Multiplying, negative, real, numbers, CC_4_NF_4, CC_5_NBT_7, CC_5_NF_4, CC_6_NS_3, CC_7_NS_2, CC_7_NS_2_a, CC_7_NS_2_c", "id": "4ve7OaCnDLs", "title": "Multiplying numbers with different signs", "description": "Find the product of numbers with different signs.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4ve7OaCnDLs.mp4/4ve7OaCnDLs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4ve7OaCnDLs.mp4/4ve7OaCnDLs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4ve7OaCnDLs.m3u8/4ve7OaCnDLs.m3u8"}, "slug": "multiplying-negative-real-numbers", "video_id": "4ve7OaCnDLs", "youtube_id": "4ve7OaCnDLs", "readable_id": "multiplying-negative-real-numbers"}, "RI874OSJp1U": {"duration": 538, "path": "khan/math/precalculus/prob_comb/independent_events_precalc/frequency-probability-and-unfair-coins/", "keywords": "probability, statistics, chance", "id": "RI874OSJp1U", "title": "Probability without equally likely events", "description": "Up until now, we've looked at probabilities surrounding only equally likely events. What about probabilities when we don't have equally likely events? Say, we have unfair coins?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RI874OSJp1U.mp4/RI874OSJp1U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RI874OSJp1U.mp4/RI874OSJp1U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RI874OSJp1U.m3u8/RI874OSJp1U.m3u8"}, "slug": "frequency-probability-and-unfair-coins", "video_id": "RI874OSJp1U", "youtube_id": "RI874OSJp1U", "readable_id": "frequency-probability-and-unfair-coins"}, "SeQeYVJZ2gE": {"duration": 1116, "path": "khan/math/probability/statistics-inferential/confidence-intervals/confidence-interval-example/", "keywords": "Confidence, Interval, Example, CC_7_SP_1, CC_7_SP_2", "id": "SeQeYVJZ2gE", "title": "Confidence interval example", "description": "Confidence Interval Example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SeQeYVJZ2gE.mp4/SeQeYVJZ2gE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SeQeYVJZ2gE.mp4/SeQeYVJZ2gE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SeQeYVJZ2gE.m3u8/SeQeYVJZ2gE.m3u8"}, "slug": "confidence-interval-example", "video_id": "SeQeYVJZ2gE", "youtube_id": "SeQeYVJZ2gE", "readable_id": "confidence-interval-example"}, "yWkga94iBzU": {"duration": 723, "path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/thin-film-interference-part-2/", "keywords": "", "id": "yWkga94iBzU", "title": "Thin Film Interference part 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yWkga94iBzU.mp4/yWkga94iBzU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yWkga94iBzU.mp4/yWkga94iBzU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yWkga94iBzU.m3u8/yWkga94iBzU.m3u8"}, "slug": "thin-film-interference-part-2", "video_id": "yWkga94iBzU", "youtube_id": "yWkga94iBzU", "readable_id": "thin-film-interference-part-2"}, "QiluvhVryI0": {"duration": 189, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/futures-fair-value-in-the-pre-market/", "keywords": "finance, futures, market, pre-opening", "id": "QiluvhVryI0", "title": "Futures fair value in the pre-market", "description": "What is the Futures Fair Value and how to traders use it as an indicator for stock price direction at market opening", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QiluvhVryI0.mp4/QiluvhVryI0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QiluvhVryI0.mp4/QiluvhVryI0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QiluvhVryI0.m3u8/QiluvhVryI0.m3u8"}, "slug": "futures-fair-value-in-the-pre-market", "video_id": "QiluvhVryI0", "youtube_id": "QiluvhVryI0", "readable_id": "futures-fair-value-in-the-pre-market"}, "YdGZaqJZbGc": {"duration": 190, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/annual-interest-varying-with-debt-maturity/", "keywords": "federal, reserve, yield, banking", "id": "YdGZaqJZbGc", "title": "Annual interest varying with debt maturity", "description": "Annual Interest Varying with Debt Maturity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YdGZaqJZbGc.mp4/YdGZaqJZbGc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YdGZaqJZbGc.mp4/YdGZaqJZbGc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YdGZaqJZbGc.m3u8/YdGZaqJZbGc.m3u8"}, "slug": "annual-interest-varying-with-debt-maturity", "video_id": "YdGZaqJZbGc", "youtube_id": "YdGZaqJZbGc", "readable_id": "annual-interest-varying-with-debt-maturity"}, "j4PI8dEWTGE": {"duration": 470, "path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/charlemagne-an-introduction/", "keywords": "Charlemagne, Carolingian, medieval", "id": "j4PI8dEWTGE", "title": "Charlemagne: An introduction (1 of 2)", "description": "Brief overview of Charlemagne and his coronation in 800.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j4PI8dEWTGE.mp4/j4PI8dEWTGE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j4PI8dEWTGE.mp4/j4PI8dEWTGE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j4PI8dEWTGE.m3u8/j4PI8dEWTGE.m3u8"}, "slug": "charlemagne-an-introduction", "video_id": "j4PI8dEWTGE", "youtube_id": "j4PI8dEWTGE", "readable_id": "charlemagne-an-introduction"}, "24YMQ9GvLss": {"duration": 522, "path": "khan/science/biology/structure-of-a-cell/cytoskeleton-junctions-and-extracellular-structures/overview-of-animal-and-plant-cells/", "keywords": "education,online learning,learning,lessons,plant cell,animal cell,cell wall,peroxisome,chloroplast,mitochondria,Cell Biology (Field Of Study),vacuole", "id": "24YMQ9GvLss", "title": "Overview of animal and plant cells", "description": "Overview of animal and plant cells. Topics include cell walls, vacuoles, chloroplasts, peroxisomes, lysosomes, mitochondria, etc.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/24YMQ9GvLss.mp4/24YMQ9GvLss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/24YMQ9GvLss.mp4/24YMQ9GvLss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/24YMQ9GvLss.m3u8/24YMQ9GvLss.m3u8"}, "slug": "overview-of-animal-and-plant-cells", "video_id": "24YMQ9GvLss", "youtube_id": "24YMQ9GvLss", "readable_id": "overview-of-animal-and-plant-cells"}, "-u0mqFqpMNY": {"duration": 626, "path": "khan/math/multivariable-calculus/partial_derivatives_topic/partial_derivatives/partial-derivatives-2/", "keywords": "partial, derivatives", "id": "-u0mqFqpMNY", "title": "Partial derivatives 2", "description": "More on partial derivatives", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-u0mqFqpMNY.mp4/-u0mqFqpMNY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-u0mqFqpMNY.mp4/-u0mqFqpMNY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-u0mqFqpMNY.m3u8/-u0mqFqpMNY.m3u8"}, "slug": "partial-derivatives-2", "video_id": "-u0mqFqpMNY", "youtube_id": "-u0mqFqpMNY", "readable_id": "partial-derivatives-2"}, "2WS1sG9fhOk": {"duration": 558, "path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/introduction-to-work-and-energy/", "keywords": "physics, work, energy, joule, force, distance, physical, science", "id": "2WS1sG9fhOk", "title": "Introduction to work and energy", "description": "Introduction to work and energy", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2WS1sG9fhOk.mp4/2WS1sG9fhOk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2WS1sG9fhOk.mp4/2WS1sG9fhOk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2WS1sG9fhOk.m3u8/2WS1sG9fhOk.m3u8"}, "slug": "introduction-to-work-and-energy", "video_id": "2WS1sG9fhOk", "youtube_id": "2WS1sG9fhOk", "readable_id": "introduction-to-work-and-energy"}, "AwX4O87g1qk": {"duration": 74, "path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-11/", "keywords": "", "id": "AwX4O87g1qk", "title": "Give Spout some grippy feet", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AwX4O87g1qk.mp4/AwX4O87g1qk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AwX4O87g1qk.mp4/AwX4O87g1qk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AwX4O87g1qk.m3u8/AwX4O87g1qk.m3u8"}, "slug": "solderless-spout-11", "video_id": "AwX4O87g1qk", "youtube_id": "AwX4O87g1qk", "readable_id": "solderless-spout-11"}, "NMZ5kJEviD0": {"duration": 635, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial/potassium-argon-k-ar-dating/", "keywords": "chronometric, revolution", "id": "NMZ5kJEviD0", "title": "Potassium-argon (K-Ar) dating", "description": "How K-Ar dating can be used to date very old volcanic rock and the things that might be buried in between", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NMZ5kJEviD0.mp4/NMZ5kJEviD0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NMZ5kJEviD0.mp4/NMZ5kJEviD0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NMZ5kJEviD0.m3u8/NMZ5kJEviD0.m3u8"}, "slug": "potassium-argon-k-ar-dating", "video_id": "NMZ5kJEviD0", "youtube_id": "NMZ5kJEviD0", "readable_id": "potassium-argon-k-ar-dating"}, "Lto6oQcGF_8": {"duration": 148, "path": "khan/test-prep/mcat/individuals-and-society/social-interactions/prejudice-vs-discrimination/", "keywords": "", "id": "Lto6oQcGF_8", "title": "Prejudice vs discrimination", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Lto6oQcGF_8.mp4/Lto6oQcGF_8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Lto6oQcGF_8.mp4/Lto6oQcGF_8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Lto6oQcGF_8.m3u8/Lto6oQcGF_8.m3u8"}, "slug": "prejudice-vs-discrimination", "video_id": "Lto6oQcGF_8", "youtube_id": "Lto6oQcGF_8", "readable_id": "prejudice-vs-discrimination"}, "E-q9JpkGc-8": {"duration": 633, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/adding-up-resistance-in-series-and-in-parallel/", "keywords": "", "id": "E-q9JpkGc-8", "title": "Adding up resistance in series and in parallel", "description": "Learn about how resistance can be added up in series and in parallel (similar to electrical circuits!). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/E-q9JpkGc-8.mp4/E-q9JpkGc-8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/E-q9JpkGc-8.mp4/E-q9JpkGc-8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/E-q9JpkGc-8.m3u8/E-q9JpkGc-8.m3u8"}, "slug": "adding-up-resistance-in-series-and-in-parallel", "video_id": "E-q9JpkGc-8", "youtube_id": "E-q9JpkGc-8", "readable_id": "adding-up-resistance-in-series-and-in-parallel"}, "s03qez-6JMA": {"duration": 244, "path": "khan/math/precalculus/imaginary_complex_precalc/i_precalc/imaginary-roots-of-negative-numbers/", "keywords": "u16_l4_t1_we2, Imaginary, Roots, of, Negative, Numbers", "id": "s03qez-6JMA", "title": "Imaginary roots of negative numbers", "description": "Imaginary Roots of Negative Numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/s03qez-6JMA.mp4/s03qez-6JMA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/s03qez-6JMA.mp4/s03qez-6JMA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/s03qez-6JMA.m3u8/s03qez-6JMA.m3u8"}, "slug": "imaginary-roots-of-negative-numbers", "video_id": "s03qez-6JMA", "youtube_id": "s03qez-6JMA", "readable_id": "imaginary-roots-of-negative-numbers"}, "uglmkcGWmx4": {"duration": 202, "path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/recognizing-features-of-functions-2-example-3/", "keywords": "", "id": "uglmkcGWmx4", "title": "Recognizing features of functions (example 3)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uglmkcGWmx4.mp4/uglmkcGWmx4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uglmkcGWmx4.mp4/uglmkcGWmx4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uglmkcGWmx4.m3u8/uglmkcGWmx4.m3u8"}, "slug": "recognizing-features-of-functions-2-example-3", "video_id": "uglmkcGWmx4", "youtube_id": "uglmkcGWmx4", "readable_id": "recognizing-features-of-functions-2-example-3"}, "5Ixp_0r5YWk": {"duration": 351, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/nerst-equation-edited/", "keywords": "", "id": "5Ixp_0r5YWk", "title": "Nerst equation", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5Ixp_0r5YWk.mp4/5Ixp_0r5YWk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5Ixp_0r5YWk.mp4/5Ixp_0r5YWk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5Ixp_0r5YWk.m3u8/5Ixp_0r5YWk.m3u8"}, "slug": "nerst-equation-edited", "video_id": "5Ixp_0r5YWk", "youtube_id": "5Ixp_0r5YWk", "readable_id": "nerst-equation-edited"}, "0rzL08BHr5c": {"duration": 308, "path": "khan/math/integral-calculus/solid_revolution_topic/function-average-value/calculating-function-average-over-interval/", "keywords": "", "id": "0rzL08BHr5c", "title": "Calculating average value of function over interval", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0rzL08BHr5c.mp4/0rzL08BHr5c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0rzL08BHr5c.mp4/0rzL08BHr5c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0rzL08BHr5c.m3u8/0rzL08BHr5c.m3u8"}, "slug": "calculating-function-average-over-interval", "video_id": "0rzL08BHr5c", "youtube_id": "0rzL08BHr5c", "readable_id": "calculating-function-average-over-interval"}, "N1GWZbwh2jQ": {"duration": 815, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/brass/trumpet-interview-and-demonstration-with-principal-david-bilger/", "keywords": "", "id": "N1GWZbwh2jQ", "title": "Trumpet: Interview and demonstration with principal David Bilger", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/N1GWZbwh2jQ.mp4/N1GWZbwh2jQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/N1GWZbwh2jQ.mp4/N1GWZbwh2jQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/N1GWZbwh2jQ.m3u8/N1GWZbwh2jQ.m3u8"}, "slug": "trumpet-interview-and-demonstration-with-principal-david-bilger", "video_id": "N1GWZbwh2jQ", "youtube_id": "N1GWZbwh2jQ", "readable_id": "trumpet-interview-and-demonstration-with-principal-david-bilger"}, "7iWHIx3kwPc": {"duration": 251, "path": "khan/partner-content/pixar/sets/sets1/meet-fran-kalal/", "keywords": "", "id": "7iWHIx3kwPc", "title": "Getting to know Fran Kalal", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7iWHIx3kwPc.mp4/7iWHIx3kwPc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7iWHIx3kwPc.mp4/7iWHIx3kwPc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7iWHIx3kwPc.m3u8/7iWHIx3kwPc.m3u8"}, "slug": "meet-fran-kalal", "video_id": "7iWHIx3kwPc", "youtube_id": "7iWHIx3kwPc", "readable_id": "meet-fran-kalal"}, "h8S-dOQe1-0": {"duration": 197, "path": "khan/science/discoveries-projects/robots/bit-zee/improving-the-battery-wires/", "keywords": "battery wires, gauge, upgrade, make, hack, bit-zee, bot", "id": "h8S-dOQe1-0", "title": "Battery wires", "description": "In this video we upgrade Bit-zee' battery wires from 32 gage to 18 gauge.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h8S-dOQe1-0.mp4/h8S-dOQe1-0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h8S-dOQe1-0.mp4/h8S-dOQe1-0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h8S-dOQe1-0.m3u8/h8S-dOQe1-0.m3u8"}, "slug": "improving-the-battery-wires", "video_id": "h8S-dOQe1-0", "youtube_id": "h8S-dOQe1-0", "readable_id": "improving-the-battery-wires"}, "dfd0l10gPPY": {"duration": 369, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/diagnosis-treatment-and-prevention-of-chlamydia/", "keywords": "", "id": "dfd0l10gPPY", "title": "Diagnosis, treatment, and prevention of chlamydia", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dfd0l10gPPY.mp4/dfd0l10gPPY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dfd0l10gPPY.mp4/dfd0l10gPPY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dfd0l10gPPY.m3u8/dfd0l10gPPY.m3u8"}, "slug": "diagnosis-treatment-and-prevention-of-chlamydia", "video_id": "dfd0l10gPPY", "youtube_id": "dfd0l10gPPY", "readable_id": "diagnosis-treatment-and-prevention-of-chlamydia"}, "ZH0P0uBY3PY": {"duration": 381, "path": "khan/humanities/medieval-world/byzantine1/constantinople-east/icon-of-the-triumph-of-orthodoxy-byzantine-c-1400/", "keywords": "Triumph of Orthodoxy, British Museum, Khan Academy, Smarthistory, Art History, Byzantine", "id": "ZH0P0uBY3PY", "title": "Icon of the Triumph of Orthodoxy", "description": "Icon of the Triumph of Orthodoxy (Byzantine), c. 1400, tempera and gold on wood, 39 cm x 31 cm (British Museum, London) Speakers: Pippa Couch and Rachel Ropeik", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZH0P0uBY3PY.mp4/ZH0P0uBY3PY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZH0P0uBY3PY.mp4/ZH0P0uBY3PY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZH0P0uBY3PY.m3u8/ZH0P0uBY3PY.m3u8"}, "slug": "icon-of-the-triumph-of-orthodoxy-byzantine-c-1400", "video_id": "ZH0P0uBY3PY", "youtube_id": "ZH0P0uBY3PY", "readable_id": "icon-of-the-triumph-of-orthodoxy-byzantine-c-1400"}, "rAxbnfKXcoE": {"duration": 366, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-stages/", "keywords": "", "id": "rAxbnfKXcoE", "title": "Lung cancer staging", "description": "Health professionals use special terminology referred to as stages to concisely communicate the progression of cancer disease. Learn how cancer is classified based off the size of the tumor, the involvement of lymph nodes, and whether metastasis has occurred.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rAxbnfKXcoE.mp4/rAxbnfKXcoE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rAxbnfKXcoE.mp4/rAxbnfKXcoE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rAxbnfKXcoE.m3u8/rAxbnfKXcoE.m3u8"}, "slug": "lung-cancer-stages", "video_id": "rAxbnfKXcoE", "youtube_id": "rAxbnfKXcoE", "readable_id": "lung-cancer-stages"}, "_QdS8xjYL48": {"duration": 513, "path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-7/", "keywords": "", "id": "_QdS8xjYL48", "title": "Install on/off switches", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_QdS8xjYL48.mp4/_QdS8xjYL48.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_QdS8xjYL48.mp4/_QdS8xjYL48.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_QdS8xjYL48.m3u8/_QdS8xjYL48.m3u8"}, "slug": "solderless-spout-7", "video_id": "_QdS8xjYL48", "youtube_id": "_QdS8xjYL48", "readable_id": "solderless-spout-7"}, "6vy5CX6vK0I": {"duration": 653, "path": "khan/science/health-and-medicine/infectious-diseases/influenza/catching-and-spreading-the-flu/", "keywords": "", "id": "6vy5CX6vK0I", "title": "Catching and spreading the flu", "description": "Find out how the flu spreads from person to person, and who is at the greatest risk of getting complications of the flu. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6vy5CX6vK0I.mp4/6vy5CX6vK0I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6vy5CX6vK0I.mp4/6vy5CX6vK0I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6vy5CX6vK0I.m3u8/6vy5CX6vK0I.m3u8"}, "slug": "catching-and-spreading-the-flu", "video_id": "6vy5CX6vK0I", "youtube_id": "6vy5CX6vK0I", "readable_id": "catching-and-spreading-the-flu"}, "ZSh1ksh1iO4": {"duration": 192, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/france/antoine-or-louis-le-nain-peasant-family-in-an-interior-2nd-quarter-of-the-17th-century/", "keywords": "LeNain, Smarthistory, Art History, Louvre", "id": "ZSh1ksh1iO4", "title": "Antoine or Louis Le Nain, Peasant Family in an Interior", "description": "Antoine or Louis Le Nain, Peasant Family in an Interior, 2nd quarter of the 17th century, oil on canvas, 1.13 x 1.59 m (Mus\u00e9e du Louvre, Paris) http://www.smarthistory.org/peasant-family-in-an-interior.html Speakers: Drs. Beth Harris and Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZSh1ksh1iO4.mp4/ZSh1ksh1iO4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZSh1ksh1iO4.mp4/ZSh1ksh1iO4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZSh1ksh1iO4.m3u8/ZSh1ksh1iO4.m3u8"}, "slug": "antoine-or-louis-le-nain-peasant-family-in-an-interior-2nd-quarter-of-the-17th-century", "video_id": "ZSh1ksh1iO4", "youtube_id": "ZSh1ksh1iO4", "readable_id": "antoine-or-louis-le-nain-peasant-family-in-an-interior-2nd-quarter-of-the-17th-century"}, "RBUBIRtn0xQ": {"duration": 346, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/consumer-producer-surplus-tut/total-consumer-surplus-as-area/", "keywords": "economics, supply, surplus, consumer", "id": "RBUBIRtn0xQ", "title": "Total consumer surplus as area", "description": "Looking at consumer surplus as area between the demand curve and the market price", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RBUBIRtn0xQ.mp4/RBUBIRtn0xQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RBUBIRtn0xQ.mp4/RBUBIRtn0xQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RBUBIRtn0xQ.m3u8/RBUBIRtn0xQ.m3u8"}, "slug": "total-consumer-surplus-as-area", "video_id": "RBUBIRtn0xQ", "youtube_id": "RBUBIRtn0xQ", "readable_id": "total-consumer-surplus-as-area"}, "ou3a7Htbrvw": {"duration": 607, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/dilated-cardiomyopathy-pathophysiology-and-diagnosis/", "keywords": "", "id": "ou3a7Htbrvw", "title": "Dilated cardiomyopathy: Pathophysiology and diagnosis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ou3a7Htbrvw.mp4/ou3a7Htbrvw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ou3a7Htbrvw.mp4/ou3a7Htbrvw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ou3a7Htbrvw.m3u8/ou3a7Htbrvw.m3u8"}, "slug": "dilated-cardiomyopathy-pathophysiology-and-diagnosis", "video_id": "ou3a7Htbrvw", "youtube_id": "ou3a7Htbrvw", "readable_id": "dilated-cardiomyopathy-pathophysiology-and-diagnosis"}, "e23FYcmAG5k": {"duration": 492, "path": "khan/humanities/history/1600s-1800s/benjamin-franklin/franklin-overview/", "keywords": "", "id": "e23FYcmAG5k", "title": "An introduction to Benjamin Franklin", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson present an overview of Benjamin Franklin's life.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e23FYcmAG5k.mp4/e23FYcmAG5k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e23FYcmAG5k.mp4/e23FYcmAG5k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e23FYcmAG5k.m3u8/e23FYcmAG5k.m3u8"}, "slug": "franklin-overview", "video_id": "e23FYcmAG5k", "youtube_id": "e23FYcmAG5k", "readable_id": "franklin-overview"}, "yg0XJWHPqOA": {"duration": 578, "path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-stability-iii/", "keywords": "", "id": "yg0XJWHPqOA", "title": "Aromatic stability III", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yg0XJWHPqOA.mp4/yg0XJWHPqOA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yg0XJWHPqOA.mp4/yg0XJWHPqOA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yg0XJWHPqOA.m3u8/yg0XJWHPqOA.m3u8"}, "slug": "aromatic-stability-iii", "video_id": "yg0XJWHPqOA", "youtube_id": "yg0XJWHPqOA", "readable_id": "aromatic-stability-iii"}, "x9wyOYnot7E": {"duration": 269, "path": "khan/test-prep/mcat/organ-systems/endocrine-system/terpenes-to-steroids2/", "keywords": "terpenes, steroids, squalene, cholesterol", "id": "x9wyOYnot7E", "title": "From terpenes to steroids part 2: Squalene, cholesterol, and steroids", "description": "After learning about terpenes, lets see how are body uses them to eventually make all the steroid hormones of our body. By Ryan Patton.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x9wyOYnot7E.mp4/x9wyOYnot7E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x9wyOYnot7E.mp4/x9wyOYnot7E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x9wyOYnot7E.m3u8/x9wyOYnot7E.m3u8"}, "slug": "terpenes-to-steroids2", "video_id": "x9wyOYnot7E", "youtube_id": "x9wyOYnot7E", "readable_id": "terpenes-to-steroids2"}, "EKLGgTwyNfU": {"duration": 142, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-17/", "keywords": "", "id": "EKLGgTwyNfU", "title": "17 Product of primes near 50", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EKLGgTwyNfU.mp4/EKLGgTwyNfU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EKLGgTwyNfU.mp4/EKLGgTwyNfU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EKLGgTwyNfU.m3u8/EKLGgTwyNfU.m3u8"}, "slug": "2013-sat-practice-6-17", "video_id": "EKLGgTwyNfU", "youtube_id": "EKLGgTwyNfU", "readable_id": "2013-sat-practice-6-17"}, "-ROhfKyxgCo": {"duration": 859, "path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/sex-linked-traits/", "keywords": "biology, mitosis, meiosis, haploid, diploid, sex-linked, trait", "id": "-ROhfKyxgCo", "title": "Sex-linked traits", "description": "Chromosomal basis for gender. Sex-linked traits.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-ROhfKyxgCo.mp4/-ROhfKyxgCo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-ROhfKyxgCo.mp4/-ROhfKyxgCo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-ROhfKyxgCo.m3u8/-ROhfKyxgCo.m3u8"}, "slug": "sex-linked-traits", "video_id": "-ROhfKyxgCo", "youtube_id": "-ROhfKyxgCo", "readable_id": "sex-linked-traits"}, "iDQ1foxYf0o": {"duration": 526, "path": "khan/math/geometry/intro_euclid/geometric-precision-practice/", "keywords": "", "id": "iDQ1foxYf0o", "title": "Geometric precision practice", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iDQ1foxYf0o.mp4/iDQ1foxYf0o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iDQ1foxYf0o.mp4/iDQ1foxYf0o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iDQ1foxYf0o.m3u8/iDQ1foxYf0o.m3u8"}, "slug": "geometric-precision-practice", "video_id": "iDQ1foxYf0o", "youtube_id": "iDQ1foxYf0o", "readable_id": "geometric-precision-practice"}, "R9PjfG1e7-w": {"duration": 631, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/nomenclature-and-properties-of-esters/", "keywords": "", "id": "R9PjfG1e7-w", "title": "Nomenclature and properties of esters", "description": "How to name esters and how to analyze their physical properties", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R9PjfG1e7-w.mp4/R9PjfG1e7-w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R9PjfG1e7-w.mp4/R9PjfG1e7-w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R9PjfG1e7-w.m3u8/R9PjfG1e7-w.m3u8"}, "slug": "nomenclature-and-properties-of-esters", "video_id": "R9PjfG1e7-w", "youtube_id": "R9PjfG1e7-w", "readable_id": "nomenclature-and-properties-of-esters"}, "d5UCZ9hO8X4": {"duration": 448, "path": "khan/math/geometry/congruence/triangle-congruence/finding-congruent-triangles/", "keywords": "geometry, congruent, triangles", "id": "d5UCZ9hO8X4", "title": "How to determine whether two triangle are congruent (example)", "description": "Sal uses the SSS, ASA, SAS, and AAS postulates to find congruent triangles.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d5UCZ9hO8X4.mp4/d5UCZ9hO8X4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d5UCZ9hO8X4.mp4/d5UCZ9hO8X4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d5UCZ9hO8X4.m3u8/d5UCZ9hO8X4.m3u8"}, "slug": "finding-congruent-triangles", "video_id": "d5UCZ9hO8X4", "youtube_id": "d5UCZ9hO8X4", "readable_id": "finding-congruent-triangles"}, "pB9HZsAFXpw": {"duration": 261, "path": "khan/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/sat-reading-test-intro/", "keywords": "", "id": "pB9HZsAFXpw", "title": "Introduction to the SAT Reading test", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pB9HZsAFXpw.mp4/pB9HZsAFXpw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pB9HZsAFXpw.mp4/pB9HZsAFXpw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pB9HZsAFXpw.m3u8/pB9HZsAFXpw.m3u8"}, "slug": "sat-reading-test-intro", "video_id": "pB9HZsAFXpw", "youtube_id": "pB9HZsAFXpw", "readable_id": "sat-reading-test-intro"}, "aERRyWMwyvk": {"duration": 431, "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/multiple-sclerosis-pathophysiology/", "keywords": "", "id": "aERRyWMwyvk", "title": "Multiple sclerosis pathophysiology", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aERRyWMwyvk.mp4/aERRyWMwyvk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aERRyWMwyvk.mp4/aERRyWMwyvk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aERRyWMwyvk.m3u8/aERRyWMwyvk.m3u8"}, "slug": "multiple-sclerosis-pathophysiology", "video_id": "aERRyWMwyvk", "youtube_id": "aERRyWMwyvk", "readable_id": "multiple-sclerosis-pathophysiology"}, "lsHq5aqz4uQ": {"duration": 699, "path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/buffer-solution-calculations/", "keywords": "", "id": "lsHq5aqz4uQ", "title": "Buffer solution pH calculations", "description": "Example of calculating the pH of a buffer solution using the Henderson-Hasselbalch equation, including the pH of the buffer solution after adding some NaOH.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lsHq5aqz4uQ.mp4/lsHq5aqz4uQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lsHq5aqz4uQ.mp4/lsHq5aqz4uQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lsHq5aqz4uQ.m3u8/lsHq5aqz4uQ.m3u8"}, "slug": "buffer-solution-calculations", "video_id": "lsHq5aqz4uQ", "youtube_id": "lsHq5aqz4uQ", "readable_id": "buffer-solution-calculations"}, "Vq7EOmvU1eQ": {"duration": 705, "path": "khan/science/discoveries-projects/reverse-engin/hair_dryer/what-is-inside-of-a-hair-dryer-2-of-2/", "keywords": "Ni-Chrome wire, Nickel-Chrome alloy, switch, housing, injection molding, PP, polypropylene, fan, louver, vent, filter, grill, insulation, motor, AC, DC, alternating current, direct current, resistor, thermal fuse, bi-metallic switch, mica sheet, brass, riv", "id": "Vq7EOmvU1eQ", "title": "What is inside a hair dryer? (2 of 2)", "description": "In this video we explore what is inside a hairdryer, how it is made, and how it works.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Vq7EOmvU1eQ.mp4/Vq7EOmvU1eQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Vq7EOmvU1eQ.mp4/Vq7EOmvU1eQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Vq7EOmvU1eQ.m3u8/Vq7EOmvU1eQ.m3u8"}, "slug": "what-is-inside-of-a-hair-dryer-2-of-2", "video_id": "Vq7EOmvU1eQ", "youtube_id": "Vq7EOmvU1eQ", "readable_id": "what-is-inside-of-a-hair-dryer-2-of-2"}, "pnwrNnZGVEw": {"duration": 425, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-integral-limit/", "keywords": "2010, IIT, JEE, Paper, #34, Integral, Limit, L'Hopital's, rule", "id": "pnwrNnZGVEw", "title": "IIT JEE integral limit", "description": "2010 IIT JEE Paper 1 #34 Integral Limit", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pnwrNnZGVEw.mp4/pnwrNnZGVEw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pnwrNnZGVEw.mp4/pnwrNnZGVEw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pnwrNnZGVEw.m3u8/pnwrNnZGVEw.m3u8"}, "slug": "iit-jee-integral-limit", "video_id": "pnwrNnZGVEw", "youtube_id": "pnwrNnZGVEw", "readable_id": "iit-jee-integral-limit"}, "NUyYlRxMtcs": {"duration": 654, "path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/autoionization-water/", "keywords": "education,online learning,learning,lessons,hydronium,hydroxide", "id": "NUyYlRxMtcs", "title": "Autoionization of water", "description": "Autoionization of water into hydronium and hydroxide ions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NUyYlRxMtcs.mp4/NUyYlRxMtcs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NUyYlRxMtcs.mp4/NUyYlRxMtcs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NUyYlRxMtcs.m3u8/NUyYlRxMtcs.m3u8"}, "slug": "autoionization-water", "video_id": "NUyYlRxMtcs", "youtube_id": "NUyYlRxMtcs", "readable_id": "autoionization-water"}, "Qm_OS-8COwU": {"duration": 1235, "path": "khan/math/linear-algebra/vectors_and_spaces/linear_combinations/linear-combinations-and-span/", "keywords": "Linear, Algebra, Vectors, span, combination", "id": "Qm_OS-8COwU", "title": "Linear combinations and span", "description": "Understanding linear combinations and spans of vectors", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qm_OS-8COwU.mp4/Qm_OS-8COwU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qm_OS-8COwU.mp4/Qm_OS-8COwU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qm_OS-8COwU.m3u8/Qm_OS-8COwU.m3u8"}, "slug": "linear-combinations-and-span", "video_id": "Qm_OS-8COwU", "youtube_id": "Qm_OS-8COwU", "readable_id": "linear-combinations-and-span"}, "eRWMxDzxHyc": {"duration": 250, "path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-school-redesign/sscc-blended-assumptions/", "keywords": "", "id": "eRWMxDzxHyc", "title": "The assumptions that limit innovation -- the school year, daily schedule, class size", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eRWMxDzxHyc.mp4/eRWMxDzxHyc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eRWMxDzxHyc.mp4/eRWMxDzxHyc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eRWMxDzxHyc.m3u8/eRWMxDzxHyc.m3u8"}, "slug": "sscc-blended-assumptions", "video_id": "eRWMxDzxHyc", "youtube_id": "eRWMxDzxHyc", "readable_id": "sscc-blended-assumptions"}, "ygXkdSKXQoA": {"duration": 463, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/naming-cycloalkane/", "keywords": "", "id": "ygXkdSKXQoA", "title": "Naming a cycloalkane", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ygXkdSKXQoA.mp4/ygXkdSKXQoA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ygXkdSKXQoA.mp4/ygXkdSKXQoA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ygXkdSKXQoA.m3u8/ygXkdSKXQoA.m3u8"}, "slug": "naming-cycloalkane", "video_id": "ygXkdSKXQoA", "youtube_id": "ygXkdSKXQoA", "readable_id": "naming-cycloalkane"}, "MpiM4C26sbY": {"duration": 64, "path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-isocahedron/", "keywords": "", "id": "MpiM4C26sbY", "title": "DLab: Building a stellated icosahedron", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MpiM4C26sbY.mp4/MpiM4C26sbY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MpiM4C26sbY.mp4/MpiM4C26sbY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MpiM4C26sbY.m3u8/MpiM4C26sbY.m3u8"}, "slug": "discovery-lab-isocahedron", "video_id": "MpiM4C26sbY", "youtube_id": "MpiM4C26sbY", "readable_id": "discovery-lab-isocahedron"}, "ABhqENOxSrU": {"duration": 279, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/pontormo-entombment-or-deposition-from-the-cross-1525-28/", "keywords": "Pontormo, Mannerism, Smarthistory, Art History", "id": "ABhqENOxSrU", "title": "Pontormo, The Entombment of Christ", "description": "Pontormo, Entombment (or Deposition from the Cross), oil on panel, 1525-28 (Capponi Chapel, Santa Felicita, Florence) Speakers: Dr. Steven Zucker, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ABhqENOxSrU.mp4/ABhqENOxSrU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ABhqENOxSrU.mp4/ABhqENOxSrU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ABhqENOxSrU.m3u8/ABhqENOxSrU.m3u8"}, "slug": "pontormo-entombment-or-deposition-from-the-cross-1525-28", "video_id": "ABhqENOxSrU", "youtube_id": "ABhqENOxSrU", "readable_id": "pontormo-entombment-or-deposition-from-the-cross-1525-28"}, "Zcpwdcvz3KE": {"duration": 155, "path": "khan/college-admissions/applying-to-college/letters-of-recommendation/elements-of-a-strong-letter-of-recommendation/", "keywords": "", "id": "Zcpwdcvz3KE", "title": "Elements of a strong recommendation letter", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zcpwdcvz3KE.mp4/Zcpwdcvz3KE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zcpwdcvz3KE.mp4/Zcpwdcvz3KE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zcpwdcvz3KE.m3u8/Zcpwdcvz3KE.m3u8"}, "slug": "elements-of-a-strong-letter-of-recommendation", "video_id": "Zcpwdcvz3KE", "youtube_id": "Zcpwdcvz3KE", "readable_id": "elements-of-a-strong-letter-of-recommendation"}, "0_DYEFtlCiM": {"duration": 400, "path": "khan/math/precalculus/precalc-matrices/matrix-equations/solving-matrix-equation/", "keywords": "", "id": "0_DYEFtlCiM", "title": "Solving the matrix vector equation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0_DYEFtlCiM.mp4/0_DYEFtlCiM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0_DYEFtlCiM.mp4/0_DYEFtlCiM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0_DYEFtlCiM.m3u8/0_DYEFtlCiM.m3u8"}, "slug": "solving-matrix-equation", "video_id": "0_DYEFtlCiM", "youtube_id": "0_DYEFtlCiM", "readable_id": "solving-matrix-equation"}, "3koOwozY4oc": {"duration": 1023, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/types-of-decay/", "keywords": "chemistry, decay, radioactive", "id": "3koOwozY4oc", "title": "Types of decay", "description": "Alpha, Beta, Gamma Decay and Positron Emission", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3koOwozY4oc.mp4/3koOwozY4oc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3koOwozY4oc.mp4/3koOwozY4oc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3koOwozY4oc.m3u8/3koOwozY4oc.m3u8"}, "slug": "types-of-decay", "video_id": "3koOwozY4oc", "youtube_id": "3koOwozY4oc", "readable_id": "types-of-decay"}, "QWninXOAMXE": {"duration": 684, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/repurchase-agreements-repo-transactions/", "keywords": "repurchase, agreement, repo, transaction, federal, reserve", "id": "QWninXOAMXE", "title": "Repurchase agreements (repo transactions)", "description": "Mechanics of repurchase agreements (repo transactions/loans)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QWninXOAMXE.mp4/QWninXOAMXE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QWninXOAMXE.mp4/QWninXOAMXE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QWninXOAMXE.m3u8/QWninXOAMXE.m3u8"}, "slug": "repurchase-agreements-repo-transactions", "video_id": "QWninXOAMXE", "youtube_id": "QWninXOAMXE", "readable_id": "repurchase-agreements-repo-transactions"}, "RKBSX-6pKgY": {"duration": 435, "path": "khan/math/precalculus/precalc-matrices/transformation-matrix/matrix-transformation-triangle/", "keywords": "", "id": "RKBSX-6pKgY", "title": "Matrix transformation on triangle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RKBSX-6pKgY.mp4/RKBSX-6pKgY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RKBSX-6pKgY.mp4/RKBSX-6pKgY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RKBSX-6pKgY.m3u8/RKBSX-6pKgY.m3u8"}, "slug": "matrix-transformation-triangle", "video_id": "RKBSX-6pKgY", "youtube_id": "RKBSX-6pKgY", "readable_id": "matrix-transformation-triangle"}, "cVXfChxmAlQ": {"duration": 193, "path": "khan/humanities/art-islam/islamic-art-late-period/english-ambassador/", "keywords": "", "id": "cVXfChxmAlQ", "title": "An English ambassador", "description": "Christopher de Bellaigue, writer, describes the portraits of Sir Robert Sherley and his wife in the exhibition Shah Abbas, the remaking of Iran.\u00a0\u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cVXfChxmAlQ.mp4/cVXfChxmAlQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cVXfChxmAlQ.mp4/cVXfChxmAlQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cVXfChxmAlQ.m3u8/cVXfChxmAlQ.m3u8"}, "slug": "english-ambassador", "video_id": "cVXfChxmAlQ", "youtube_id": "cVXfChxmAlQ", "readable_id": "english-ambassador"}, "AJNDeVt9UOo": {"duration": 120, "path": "khan/math/algebra/introduction-to-algebra/variable-and-expressions/variables-and-expressions-1/", "keywords": "U09_L1_T1_we1, Variables, and, Expressions, CC_6_EE_2_c, CC_6_EE_6, CC_6_EE_9, CC_7_EE_4, CC_8_EE_7", "id": "AJNDeVt9UOo", "title": "How to evaluate an expression with variables", "description": "Learn how to evaluate an expression with variables using a technique called substitution (or \"plugging in\").", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AJNDeVt9UOo.mp4/AJNDeVt9UOo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AJNDeVt9UOo.mp4/AJNDeVt9UOo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AJNDeVt9UOo.m3u8/AJNDeVt9UOo.m3u8"}, "slug": "variables-and-expressions-1", "video_id": "AJNDeVt9UOo", "youtube_id": "AJNDeVt9UOo", "readable_id": "variables-and-expressions-1"}, "qvyboGryeA8": {"duration": 787, "path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/null-space-2-calculating-the-null-space-of-a-matrix/", "keywords": "nullspace, null, space, subspace, matrix, vector", "id": "qvyboGryeA8", "title": "Null space 2: Calculating the null space of a matrix", "description": "Calculating the null space of a matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qvyboGryeA8.mp4/qvyboGryeA8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qvyboGryeA8.mp4/qvyboGryeA8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qvyboGryeA8.m3u8/qvyboGryeA8.m3u8"}, "slug": "null-space-2-calculating-the-null-space-of-a-matrix", "video_id": "qvyboGryeA8", "youtube_id": "qvyboGryeA8", "readable_id": "null-space-2-calculating-the-null-space-of-a-matrix"}, "AimYG1jYD0A": {"duration": 447, "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/current-capital-account/balance-of-payments-capital-account/", "keywords": "macroeconomics, balance, of, payments", "id": "AimYG1jYD0A", "title": "Balance of payments: Capital account", "description": "Understanding how changes in foreign ownership of assets effects balance of payments", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AimYG1jYD0A.mp4/AimYG1jYD0A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AimYG1jYD0A.mp4/AimYG1jYD0A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AimYG1jYD0A.m3u8/AimYG1jYD0A.m3u8"}, "slug": "balance-of-payments-capital-account", "video_id": "AimYG1jYD0A", "youtube_id": "AimYG1jYD0A", "readable_id": "balance-of-payments-capital-account"}, "MVHy_hbKSa4": {"duration": 167, "path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/engaging-in-extracurricular-activities/", "keywords": "", "id": "MVHy_hbKSa4", "title": "Engaging in extracurricular activities", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MVHy_hbKSa4.mp4/MVHy_hbKSa4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MVHy_hbKSa4.mp4/MVHy_hbKSa4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MVHy_hbKSa4.m3u8/MVHy_hbKSa4.m3u8"}, "slug": "engaging-in-extracurricular-activities", "video_id": "MVHy_hbKSa4", "youtube_id": "MVHy_hbKSa4", "readable_id": "engaging-in-extracurricular-activities"}, "rndex9FCIdo": {"duration": 690, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-lagrange-s-formula/", "keywords": "2010, IIT, JEE, Paper, Problem, 49, Lagrange's, Formula", "id": "rndex9FCIdo", "title": "IIT JEE lagrange's formula", "description": "2010 IIT JEE Paper 1 Problem 49 Lagrange's Formula", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rndex9FCIdo.mp4/rndex9FCIdo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rndex9FCIdo.mp4/rndex9FCIdo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rndex9FCIdo.m3u8/rndex9FCIdo.m3u8"}, "slug": "iit-jee-lagrange-s-formula", "video_id": "rndex9FCIdo", "youtube_id": "rndex9FCIdo", "readable_id": "iit-jee-lagrange-s-formula"}, "Obch1OP5QyA": {"duration": 102, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/exponential-to-logarithmic-form/", "keywords": "", "id": "Obch1OP5QyA", "title": "Writing in logarithmic and exponential form", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Obch1OP5QyA.mp4/Obch1OP5QyA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Obch1OP5QyA.mp4/Obch1OP5QyA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Obch1OP5QyA.m3u8/Obch1OP5QyA.m3u8"}, "slug": "exponential-to-logarithmic-form", "video_id": "Obch1OP5QyA", "youtube_id": "Obch1OP5QyA", "readable_id": "exponential-to-logarithmic-form"}, "xxAFh-qHPPA": {"duration": 323, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/algebra-foundations-scientific-notation/scientific-notation-example-2/", "keywords": "u11_l1_t4_we2, Scientific, Notation, CC_5_NBT_2, CC_8_EE_3, CC_8_EE_4", "id": "xxAFh-qHPPA", "title": "Multiplying in scientific notation (example)", "description": "Learn how to solve a multiplication problem using scientific notation: (9.1 * 10^6)(3.2 * 10^-5)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xxAFh-qHPPA.mp4/xxAFh-qHPPA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xxAFh-qHPPA.mp4/xxAFh-qHPPA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xxAFh-qHPPA.m3u8/xxAFh-qHPPA.m3u8"}, "slug": "scientific-notation-example-2", "video_id": "xxAFh-qHPPA", "youtube_id": "xxAFh-qHPPA", "readable_id": "scientific-notation-example-2"}, "WU7TfO-iaK8": {"duration": 897, "path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/specific-heat-and-latent-leat-of-fusion-and-vaporization-2/", "keywords": "", "id": "WU7TfO-iaK8", "title": "Specific heat and latent leat of fusion and vaporization", "description": "Defining specific heat, heat of fusion, and heat of vaporization. How to calculate the amount of heat to change the temperature of water and the energy required to change for a phase change.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WU7TfO-iaK8.mp4/WU7TfO-iaK8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WU7TfO-iaK8.mp4/WU7TfO-iaK8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WU7TfO-iaK8.m3u8/WU7TfO-iaK8.m3u8"}, "slug": "specific-heat-and-latent-leat-of-fusion-and-vaporization-2", "video_id": "WU7TfO-iaK8", "youtube_id": "WU7TfO-iaK8", "readable_id": "specific-heat-and-latent-leat-of-fusion-and-vaporization-2"}, "CkQOCnLWPUA": {"duration": 820, "path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/showing-that-the-candidate-basis-does-span-c-a/", "keywords": "column, space, matrix, dimension, rank", "id": "CkQOCnLWPUA", "title": "Showing that the candidate basis does span C(A)", "description": "Showing that just the columns of A associated with the pivot columns of rref(A) do indeed span C(A).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CkQOCnLWPUA.mp4/CkQOCnLWPUA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CkQOCnLWPUA.mp4/CkQOCnLWPUA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CkQOCnLWPUA.m3u8/CkQOCnLWPUA.m3u8"}, "slug": "showing-that-the-candidate-basis-does-span-c-a", "video_id": "CkQOCnLWPUA", "youtube_id": "CkQOCnLWPUA", "readable_id": "showing-that-the-candidate-basis-does-span-c-a"}, "beU3xkhwgs4": {"duration": 109, "path": "khan/humanities/global-culture/conceptual-performance/jannis-kounellis/", "keywords": "", "id": "beU3xkhwgs4", "title": "Jannis Kounellis, \"Da inventare sul posto (To invent on the spot)\"", "description": "Watch Jannis Kounellis combine painting music and dance.\u00a0To learn more about what artists have to say, take our online course,\u00a0Modern and Contemporary Art, 1945-1989.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/beU3xkhwgs4.mp4/beU3xkhwgs4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/beU3xkhwgs4.mp4/beU3xkhwgs4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/beU3xkhwgs4.m3u8/beU3xkhwgs4.m3u8"}, "slug": "jannis-kounellis", "video_id": "beU3xkhwgs4", "youtube_id": "beU3xkhwgs4", "readable_id": "jannis-kounellis"}, "Id6UovYjd-M": {"duration": 59, "path": "khan/math/algebra2/functions-and-graphs/function-introduction/understanding-function-notation-example-1/", "keywords": "", "id": "Id6UovYjd-M", "title": "How to evaluate a function given its formula (example)", "description": "Sal evaluates f(x)=49-x^2 at x=5.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Id6UovYjd-M.mp4/Id6UovYjd-M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Id6UovYjd-M.mp4/Id6UovYjd-M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Id6UovYjd-M.m3u8/Id6UovYjd-M.m3u8"}, "slug": "understanding-function-notation-example-1", "video_id": "Id6UovYjd-M", "youtube_id": "Id6UovYjd-M", "readable_id": "understanding-function-notation-example-1"}, "xRw0CLvQkjo": {"duration": 57, "path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-2/", "keywords": "", "id": "xRw0CLvQkjo", "title": "Connect the SPDT switches", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xRw0CLvQkjo.mp4/xRw0CLvQkjo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xRw0CLvQkjo.mp4/xRw0CLvQkjo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xRw0CLvQkjo.m3u8/xRw0CLvQkjo.m3u8"}, "slug": "solderless-spout-2", "video_id": "xRw0CLvQkjo", "youtube_id": "xRw0CLvQkjo", "readable_id": "solderless-spout-2"}, "Y4HzGldIAss": {"duration": 470, "path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/arrhenius-definition-of-acids-and-bases/", "keywords": "education,online learning,learning,lessons,arrhenius definition,acid,base", "id": "Y4HzGldIAss", "title": "Arrhenius definition of acids and bases", "description": "Arrhenius definition of acids and bases", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y4HzGldIAss.mp4/Y4HzGldIAss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y4HzGldIAss.mp4/Y4HzGldIAss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y4HzGldIAss.m3u8/Y4HzGldIAss.m3u8"}, "slug": "arrhenius-definition-of-acids-and-bases", "video_id": "Y4HzGldIAss", "youtube_id": "Y4HzGldIAss", "readable_id": "arrhenius-definition-of-acids-and-bases"}, "FcRxdq7KGOQ": {"duration": 259, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/upper-bound-on-forward-settlement-price/", "keywords": "Futures, arbitrage", "id": "FcRxdq7KGOQ", "title": "Upper bound on forward settlement price", "description": "Upper Bound on Forward Settlement Price", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FcRxdq7KGOQ.mp4/FcRxdq7KGOQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FcRxdq7KGOQ.mp4/FcRxdq7KGOQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FcRxdq7KGOQ.m3u8/FcRxdq7KGOQ.m3u8"}, "slug": "upper-bound-on-forward-settlement-price", "video_id": "FcRxdq7KGOQ", "youtube_id": "FcRxdq7KGOQ", "readable_id": "upper-bound-on-forward-settlement-price"}, "RHQH16HjcPs": {"duration": 570, "path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/gluconeogenesis/", "keywords": "", "id": "RHQH16HjcPs", "title": "Gluconeogenesis: the big picture", "description": "What are the reactions that are unique to gluconeogenesis (vs. glycolysis)?Where does gluconeogenesis fit into carbohydrate metabolism? What is the big picture?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RHQH16HjcPs.mp4/RHQH16HjcPs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RHQH16HjcPs.mp4/RHQH16HjcPs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RHQH16HjcPs.m3u8/RHQH16HjcPs.m3u8"}, "slug": "gluconeogenesis", "video_id": "RHQH16HjcPs", "youtube_id": "RHQH16HjcPs", "readable_id": "gluconeogenesis"}, "bWTtHKSEcdI": {"duration": 775, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-similar-triangles-1/", "keywords": "geometry, similar, triangles", "id": "bWTtHKSEcdI", "title": "CA Geometry: Similar triangles 1", "description": "10-14, similar triangles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bWTtHKSEcdI.mp4/bWTtHKSEcdI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bWTtHKSEcdI.mp4/bWTtHKSEcdI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bWTtHKSEcdI.m3u8/bWTtHKSEcdI.m3u8"}, "slug": "ca-geometry-similar-triangles-1", "video_id": "bWTtHKSEcdI", "youtube_id": "bWTtHKSEcdI", "readable_id": "ca-geometry-similar-triangles-1"}, "ysdY1iX_XCs": {"duration": 222, "path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/solving-two-variable-linear-inequality-word-problem/", "keywords": "education,online learning,learning,lessons", "id": "ysdY1iX_XCs", "title": "How to solve a word problem that uses a two-variable linear inequality (example)", "description": "Sal is given a two-variable linear inequality that models a context about watering plants, and answers a question about the solution set of the inequality in terms of the context.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ysdY1iX_XCs.mp4/ysdY1iX_XCs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ysdY1iX_XCs.mp4/ysdY1iX_XCs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ysdY1iX_XCs.m3u8/ysdY1iX_XCs.m3u8"}, "slug": "solving-two-variable-linear-inequality-word-problem", "video_id": "ysdY1iX_XCs", "youtube_id": "ysdY1iX_XCs", "readable_id": "solving-two-variable-linear-inequality-word-problem"}, "f7J0WQsajX8": {"duration": 265, "path": "khan/humanities/medieval-world/byzantine1/constantinople-east/byzantine-panel-with-archangel-c-525-50/", "keywords": "Byzantine Empire Archangel, smarthistory, art history, Ivory", "id": "f7J0WQsajX8", "title": "Ivory panel with Archangel", "description": "Byzantine panel with archangel, Ivory leaf from diptych, c. 525-50, 16.8 x 5.6 x 0.35 in. (42.8 x 14.3 x 0.9 cm), probably from Constantinople (modern Istanbul, Turkey), (British Museum, London) The British Museum translates the text at the top of the panel as: \"Receive the suppliant before you, despite his sinfulness.\" Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/f7J0WQsajX8.mp4/f7J0WQsajX8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/f7J0WQsajX8.mp4/f7J0WQsajX8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/f7J0WQsajX8.m3u8/f7J0WQsajX8.m3u8"}, "slug": "byzantine-panel-with-archangel-c-525-50", "video_id": "f7J0WQsajX8", "youtube_id": "f7J0WQsajX8", "readable_id": "byzantine-panel-with-archangel-c-525-50"}, "IiKKAw38ss0": {"duration": 618, "path": "khan/economics-finance-domain/core-finance/taxes-topic/corporate-taxation/is-limited-liability-or-double-taxation-fair/", "keywords": "corporation, LLC, taxes", "id": "IiKKAw38ss0", "title": "Is limited liability or double taxation fair?", "description": "Thinking about whether limited liability or double taxation is fair", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IiKKAw38ss0.mp4/IiKKAw38ss0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IiKKAw38ss0.mp4/IiKKAw38ss0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IiKKAw38ss0.m3u8/IiKKAw38ss0.m3u8"}, "slug": "is-limited-liability-or-double-taxation-fair", "video_id": "IiKKAw38ss0", "youtube_id": "IiKKAw38ss0", "readable_id": "is-limited-liability-or-double-taxation-fair"}, "HnDvUaVjQ1I": {"duration": 256, "path": "khan/math/trigonometry/less-basic-trigonometry/pythagorean-identity/pythagorean-trig-identity-from-soh-cah-toa/", "keywords": "", "id": "HnDvUaVjQ1I", "title": "Pythagorean trig identity from soh cah toa", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HnDvUaVjQ1I.mp4/HnDvUaVjQ1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HnDvUaVjQ1I.mp4/HnDvUaVjQ1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HnDvUaVjQ1I.m3u8/HnDvUaVjQ1I.m3u8"}, "slug": "pythagorean-trig-identity-from-soh-cah-toa", "video_id": "HnDvUaVjQ1I", "youtube_id": "HnDvUaVjQ1I", "readable_id": "pythagorean-trig-identity-from-soh-cah-toa"}, "JVDrlTdzxiI": {"duration": 728, "path": "khan/math/linear-algebra/vectors_and_spaces/matrices_elimination/matrices-reduced-row-echelon-form-3/", "keywords": "matrix, augmented, echelon", "id": "JVDrlTdzxiI", "title": "Matrices: Reduced row echelon form 3", "description": "And another example of solving a system of linear equations by putting an augmented matrix into reduced row echelon form", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JVDrlTdzxiI.mp4/JVDrlTdzxiI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JVDrlTdzxiI.mp4/JVDrlTdzxiI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JVDrlTdzxiI.m3u8/JVDrlTdzxiI.m3u8"}, "slug": "matrices-reduced-row-echelon-form-3", "video_id": "JVDrlTdzxiI", "youtube_id": "JVDrlTdzxiI", "readable_id": "matrices-reduced-row-echelon-form-3"}, "5tXV-8-6tw0": {"duration": 315, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis/what-is-pertussis/", "keywords": "", "id": "5tXV-8-6tw0", "title": "What is pertussis?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5tXV-8-6tw0.mp4/5tXV-8-6tw0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5tXV-8-6tw0.mp4/5tXV-8-6tw0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5tXV-8-6tw0.m3u8/5tXV-8-6tw0.m3u8"}, "slug": "what-is-pertussis", "video_id": "5tXV-8-6tw0", "youtube_id": "5tXV-8-6tw0", "readable_id": "what-is-pertussis"}, "tIqO2GS8O64": {"duration": 334, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/william-holman-hunt-our-english-coasts-strayed-sheep-1852/", "keywords": "Hunt, Strayed Sheep, GAP, Tate Britain, William Holman Hunt, Our English Coasts, 1852, Tate, Britain, London, Khan Academy, smarthistory, art history, Google Art Project, OER, painting, Landscape, English, sheep, coastline", "id": "tIqO2GS8O64", "title": "Hunt, Our English Coasts (\"Strayed Sheep\")", "description": "William Holman Hunt, Our English Coasts ('Strayed Sheep'), 1852, oil on canvas, 432 x 584 mm (Tate Britain, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tIqO2GS8O64.mp4/tIqO2GS8O64.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tIqO2GS8O64.mp4/tIqO2GS8O64.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tIqO2GS8O64.m3u8/tIqO2GS8O64.m3u8"}, "slug": "william-holman-hunt-our-english-coasts-strayed-sheep-1852", "video_id": "tIqO2GS8O64", "youtube_id": "tIqO2GS8O64", "readable_id": "william-holman-hunt-our-english-coasts-strayed-sheep-1852"}, "9Ng6Zv9oLzk": {"duration": 482, "path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-reaction-new/", "keywords": "Diels\u2013Alder Reaction,Diels-Alder", "id": "9Ng6Zv9oLzk", "title": "Diels-Alder reaction", "description": "How to draw the products for a Diels-Alder reaction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9Ng6Zv9oLzk.mp4/9Ng6Zv9oLzk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9Ng6Zv9oLzk.mp4/9Ng6Zv9oLzk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9Ng6Zv9oLzk.m3u8/9Ng6Zv9oLzk.m3u8"}, "slug": "diels-alder-reaction-new", "video_id": "9Ng6Zv9oLzk", "youtube_id": "9Ng6Zv9oLzk", "readable_id": "diels-alder-reaction-new"}, "rWfs1hyguaM": {"duration": 847, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/ring-opening-reactions-epoxides/ring-opening-reactions-of-epoxides-strong-nucleophiles/", "keywords": "", "id": "rWfs1hyguaM", "title": "Ring-opening reactions of epoxides: Strong nucleophiles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rWfs1hyguaM.mp4/rWfs1hyguaM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rWfs1hyguaM.mp4/rWfs1hyguaM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rWfs1hyguaM.m3u8/rWfs1hyguaM.m3u8"}, "slug": "ring-opening-reactions-of-epoxides-strong-nucleophiles", "video_id": "rWfs1hyguaM", "youtube_id": "rWfs1hyguaM", "readable_id": "ring-opening-reactions-of-epoxides-strong-nucleophiles"}, "IYS4Bd9F3LA": {"duration": 531, "path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/projectile-height-given-time/", "keywords": "physics, mechanics, projectile, motion", "id": "IYS4Bd9F3LA", "title": "Projectile height given time", "description": "Figuring out how high a ball gets given how long it spends in the air", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IYS4Bd9F3LA.mp4/IYS4Bd9F3LA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IYS4Bd9F3LA.mp4/IYS4Bd9F3LA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IYS4Bd9F3LA.m3u8/IYS4Bd9F3LA.m3u8"}, "slug": "projectile-height-given-time", "video_id": "IYS4Bd9F3LA", "youtube_id": "IYS4Bd9F3LA", "readable_id": "projectile-height-given-time"}, "Pu1WCHsYfKQ": {"duration": 223, "path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/duccio-the-virgin-and-child-c-1315/", "keywords": "art, art history, duccio, Renaissance, trecento, London, National Gallery", "id": "Pu1WCHsYfKQ", "title": "Duccio, The Virgin and Child with Saints Dominic and Aurea", "description": "Duccio di Buoninsegna, The Virgin and Child with Saints Dominic and Aurea, c. 1315, tempera on wood, 42.5 x 34.5 cm (National Gallery, London). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Pu1WCHsYfKQ.mp4/Pu1WCHsYfKQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Pu1WCHsYfKQ.mp4/Pu1WCHsYfKQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Pu1WCHsYfKQ.m3u8/Pu1WCHsYfKQ.m3u8"}, "slug": "duccio-the-virgin-and-child-c-1315", "video_id": "Pu1WCHsYfKQ", "youtube_id": "Pu1WCHsYfKQ", "readable_id": "duccio-the-virgin-and-child-c-1315"}, "9_-YqgZs6vI": {"duration": 827, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/tchaikovsky-4th-analysis/pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-1/", "keywords": "", "id": "9_-YqgZs6vI", "title": "Pyotr Ilyich Tchaikovsky: Symphony No.4, analysis by Gerard Schwarz (part 1)", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9_-YqgZs6vI.mp4/9_-YqgZs6vI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9_-YqgZs6vI.mp4/9_-YqgZs6vI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9_-YqgZs6vI.m3u8/9_-YqgZs6vI.m3u8"}, "slug": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-1", "video_id": "9_-YqgZs6vI", "youtube_id": "9_-YqgZs6vI", "readable_id": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-1"}, "ZhROXmbUVKE": {"duration": 46, "path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/determining-a-translation-for-a-shape/", "keywords": "", "id": "ZhROXmbUVKE", "title": "Determining a translation for a shape", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZhROXmbUVKE.mp4/ZhROXmbUVKE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZhROXmbUVKE.mp4/ZhROXmbUVKE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZhROXmbUVKE.m3u8/ZhROXmbUVKE.m3u8"}, "slug": "determining-a-translation-for-a-shape", "video_id": "ZhROXmbUVKE", "youtube_id": "ZhROXmbUVKE", "readable_id": "determining-a-translation-for-a-shape"}, "8XKFcz7zP5E": {"duration": 536, "path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-3/", "keywords": "", "id": "8XKFcz7zP5E", "title": "Attach the LED eyes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8XKFcz7zP5E.mp4/8XKFcz7zP5E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8XKFcz7zP5E.mp4/8XKFcz7zP5E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8XKFcz7zP5E.m3u8/8XKFcz7zP5E.m3u8"}, "slug": "solderless-spout-3", "video_id": "8XKFcz7zP5E", "youtube_id": "8XKFcz7zP5E", "readable_id": "solderless-spout-3"}, "9Jg5S7F2SMQ": {"duration": 124, "path": "khan/math/early-math/cc-early-math-place-value-topic/cc-early-math-three-digit-compare/comparing-whole-numbers/", "keywords": "U01_L1_T3_we1, Comparing, Whole, Numbers", "id": "9Jg5S7F2SMQ", "title": "Comparing whole numbers", "description": "Learn how to compare whole numbers. The numbers used in this video are 394 and 397.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9Jg5S7F2SMQ.mp4/9Jg5S7F2SMQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9Jg5S7F2SMQ.mp4/9Jg5S7F2SMQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9Jg5S7F2SMQ.m3u8/9Jg5S7F2SMQ.m3u8"}, "slug": "comparing-whole-numbers", "video_id": "9Jg5S7F2SMQ", "youtube_id": "9Jg5S7F2SMQ", "readable_id": "comparing-whole-numbers"}, "EmQ1TdoT-zE": {"duration": 301, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/hagia-sophia-apse/", "keywords": "byzantine, hagia sophia", "id": "EmQ1TdoT-zE", "title": "Theotokos mosaic, apse, Hagia Sophia, Istanbul", "description": "Theotokos mosaic, 867, apse, Hagia Sophia, Istanbul\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EmQ1TdoT-zE.mp4/EmQ1TdoT-zE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EmQ1TdoT-zE.mp4/EmQ1TdoT-zE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EmQ1TdoT-zE.m3u8/EmQ1TdoT-zE.m3u8"}, "slug": "hagia-sophia-apse", "video_id": "EmQ1TdoT-zE", "youtube_id": "EmQ1TdoT-zE", "readable_id": "hagia-sophia-apse"}, "i8r7ZTUqB9w": {"duration": 177, "path": "khan/math/early-math/cc-early-math-add-sub-1000/cc-early-math-sub-ones-tens-hundreds/subtracting-three-digit-numbers-without-regrouping/", "keywords": "education,online learning,learning,lessons", "id": "i8r7ZTUqB9w", "title": "Subtracting three-digit numbers without regrouping", "description": "Sal shows how to subtract 357 - 251.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i8r7ZTUqB9w.mp4/i8r7ZTUqB9w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i8r7ZTUqB9w.mp4/i8r7ZTUqB9w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i8r7ZTUqB9w.m3u8/i8r7ZTUqB9w.m3u8"}, "slug": "subtracting-three-digit-numbers-without-regrouping", "video_id": "i8r7ZTUqB9w", "youtube_id": "i8r7ZTUqB9w", "readable_id": "subtracting-three-digit-numbers-without-regrouping"}, "vinEPfrqfiU": {"duration": 186, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-sal/e2-e1-sn2-sn1-reactions-example-2/", "keywords": "E2, E1, Sn2, Sn1, Reactions, Example, organic, chemistry", "id": "vinEPfrqfiU", "title": "E2 E1 Sn2 Sn1 reactions example 2", "description": "E2 E1 Sn2 Sn1 Reactions Example 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vinEPfrqfiU.mp4/vinEPfrqfiU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vinEPfrqfiU.mp4/vinEPfrqfiU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vinEPfrqfiU.m3u8/vinEPfrqfiU.m3u8"}, "slug": "e2-e1-sn2-sn1-reactions-example-2", "video_id": "vinEPfrqfiU", "youtube_id": "vinEPfrqfiU", "readable_id": "e2-e1-sn2-sn1-reactions-example-2"}, "EOJrRnpiq5s": {"duration": 399, "path": "khan/test-prep/mcat/chemical-processes/separations-purifications/column-chromatography/", "keywords": "column chromatography", "id": "EOJrRnpiq5s", "title": "Column chromatography", "description": "Learn how to separate chemicals using column chromatography. By Angela Guerrero.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EOJrRnpiq5s.mp4/EOJrRnpiq5s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EOJrRnpiq5s.mp4/EOJrRnpiq5s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EOJrRnpiq5s.m3u8/EOJrRnpiq5s.m3u8"}, "slug": "column-chromatography", "video_id": "EOJrRnpiq5s", "youtube_id": "EOJrRnpiq5s", "readable_id": "column-chromatography"}, "WFuLVSz6n8M": {"duration": 247, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-writer-payoff-diagrams/", "keywords": "Put, Writer, Payoff, Diagrams", "id": "WFuLVSz6n8M", "title": "Put writer payoff diagrams", "description": "Put Writer Payoff Diagrams", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WFuLVSz6n8M.mp4/WFuLVSz6n8M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WFuLVSz6n8M.mp4/WFuLVSz6n8M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WFuLVSz6n8M.m3u8/WFuLVSz6n8M.m3u8"}, "slug": "put-writer-payoff-diagrams", "video_id": "WFuLVSz6n8M", "youtube_id": "WFuLVSz6n8M", "readable_id": "put-writer-payoff-diagrams"}, "dAMNo4u6Ogc": {"duration": 76, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2008-may-4-13/", "keywords": "", "id": "dAMNo4u6Ogc", "title": "13 Exponential growth", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dAMNo4u6Ogc.mp4/dAMNo4u6Ogc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dAMNo4u6Ogc.mp4/dAMNo4u6Ogc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dAMNo4u6Ogc.m3u8/dAMNo4u6Ogc.m3u8"}, "slug": "sat-2008-may-4-13", "video_id": "dAMNo4u6Ogc", "youtube_id": "dAMNo4u6Ogc", "readable_id": "sat-2008-may-4-13"}, "Ec-BKdC8vOo": {"duration": 1098, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-14/", "keywords": "trigonometry, parrallelogram, area", "id": "Ec-BKdC8vOo", "title": "2003 AIME II problem 14", "description": "Trigonometry and geometry to find the area of an equilateral (but not regular) hexagon", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ec-BKdC8vOo.mp4/Ec-BKdC8vOo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ec-BKdC8vOo.mp4/Ec-BKdC8vOo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ec-BKdC8vOo.m3u8/Ec-BKdC8vOo.m3u8"}, "slug": "2003-aime-ii-problem-14", "video_id": "Ec-BKdC8vOo", "youtube_id": "Ec-BKdC8vOo", "readable_id": "2003-aime-ii-problem-14"}, "UDe6zeabyQM": {"duration": 231, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/futures-curves-ii/", "keywords": "Futures, Curves, II", "id": "UDe6zeabyQM", "title": "Futures curves II", "description": "Futures Curves II", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UDe6zeabyQM.mp4/UDe6zeabyQM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UDe6zeabyQM.mp4/UDe6zeabyQM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UDe6zeabyQM.m3u8/UDe6zeabyQM.m3u8"}, "slug": "futures-curves-ii", "video_id": "UDe6zeabyQM", "youtube_id": "UDe6zeabyQM", "readable_id": "futures-curves-ii"}, "LpLnmuAyNWg": {"duration": 99, "path": "khan/math/pre-algebra/decimals-pre-alg/decimals-on-number-line-pre-alg/decimals-on-a-number-line/", "keywords": "u03_l1_t2_we3, Decimals, on, Number, Line", "id": "LpLnmuAyNWg", "title": "Comparing two decimal numbers using a number line (example)", "description": "Let's compare decimals on a number line, shall we?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LpLnmuAyNWg.mp4/LpLnmuAyNWg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LpLnmuAyNWg.mp4/LpLnmuAyNWg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LpLnmuAyNWg.m3u8/LpLnmuAyNWg.m3u8"}, "slug": "decimals-on-a-number-line", "video_id": "LpLnmuAyNWg", "youtube_id": "LpLnmuAyNWg", "readable_id": "decimals-on-a-number-line"}, "QwvJ6z49m-c": {"duration": 920, "path": "khan/humanities/history/american-civics/american-civics/more-fiscal-cliff-analysis/", "keywords": "", "id": "QwvJ6z49m-c", "title": "More fiscal cliff analysis", "description": "A bit more in-depth analysis when thinking about the fiscal cliff.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QwvJ6z49m-c.mp4/QwvJ6z49m-c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QwvJ6z49m-c.mp4/QwvJ6z49m-c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QwvJ6z49m-c.m3u8/QwvJ6z49m-c.m3u8"}, "slug": "more-fiscal-cliff-analysis", "video_id": "QwvJ6z49m-c", "youtube_id": "QwvJ6z49m-c", "readable_id": "more-fiscal-cliff-analysis"}, "TGgOCc5hoHA": {"duration": 394, "path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/matching-a-trigonometric-function-to-its-graph/", "keywords": "amplitude, period, trig", "id": "TGgOCc5hoHA", "title": "Example: Figure out the trig function", "description": "Determining a trig function given its graph", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TGgOCc5hoHA.mp4/TGgOCc5hoHA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TGgOCc5hoHA.mp4/TGgOCc5hoHA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TGgOCc5hoHA.m3u8/TGgOCc5hoHA.m3u8"}, "slug": "matching-a-trigonometric-function-to-its-graph", "video_id": "TGgOCc5hoHA", "youtube_id": "TGgOCc5hoHA", "readable_id": "matching-a-trigonometric-function-to-its-graph"}, "gS6TfWUv97I": {"duration": 435, "path": "khan/math/arithmetic/multiplication-division/lattice_multiplication/lattice-multiplication/", "keywords": "lattice, multiplication, CC_3_OA_5, CC_3_OA_7, CC_4_NBT_5", "id": "gS6TfWUv97I", "title": "Lattice multiplication", "description": "Introduction to lattice multiplication", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gS6TfWUv97I.mp4/gS6TfWUv97I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gS6TfWUv97I.mp4/gS6TfWUv97I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gS6TfWUv97I.m3u8/gS6TfWUv97I.m3u8"}, "slug": "lattice-multiplication", "video_id": "gS6TfWUv97I", "youtube_id": "gS6TfWUv97I", "readable_id": "lattice-multiplication"}, "HbDWBeRJboE": {"duration": 445, "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-preparation-alkynes/preparation-of-alkynes/", "keywords": "", "id": "HbDWBeRJboE", "title": "Preparation of alkynes", "description": "Note that if a terminal alkyne is produced, the strong base will deprotonate the alkyne to form an alkynide anion. A proton source (like H2O) must be added to regenerate the terminal alkyne.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HbDWBeRJboE.mp4/HbDWBeRJboE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HbDWBeRJboE.mp4/HbDWBeRJboE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HbDWBeRJboE.m3u8/HbDWBeRJboE.m3u8"}, "slug": "preparation-of-alkynes", "video_id": "HbDWBeRJboE", "youtube_id": "HbDWBeRJboE", "readable_id": "preparation-of-alkynes"}, "8shz0KfqkMo": {"duration": 401, "path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/sensory-adapting/", "keywords": "", "id": "8shz0KfqkMo", "title": "Sensory adaptation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8shz0KfqkMo.mp4/8shz0KfqkMo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8shz0KfqkMo.mp4/8shz0KfqkMo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8shz0KfqkMo.m3u8/8shz0KfqkMo.m3u8"}, "slug": "sensory-adapting", "video_id": "8shz0KfqkMo", "youtube_id": "8shz0KfqkMo", "readable_id": "sensory-adapting"}, "TGwXMpWvcYU": {"duration": 235, "path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/dreaming/", "keywords": "", "id": "TGwXMpWvcYU", "title": "Dreaming", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TGwXMpWvcYU.mp4/TGwXMpWvcYU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TGwXMpWvcYU.mp4/TGwXMpWvcYU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TGwXMpWvcYU.m3u8/TGwXMpWvcYU.m3u8"}, "slug": "dreaming", "video_id": "TGwXMpWvcYU", "youtube_id": "TGwXMpWvcYU", "readable_id": "dreaming"}, "NpWxl4C0OWU": {"duration": 363, "path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/mondrian-composition-no-ii-with-red-and-blue-1929/", "keywords": "Mondrian, Smarthistory, Art History, Piet Mondrian", "id": "NpWxl4C0OWU", "title": "Mondrian, Composition No. II, with Red and Blue", "description": "Piet Mondrian, Composition No. II, with Red and Blue, oil on canvas, 1929 (original date partly obliterated; mistakenly repainted 1925 by Mondrian). Oil on canvas, 15 7/8 x 12 5/8\" (40.3 x 32.1 cm) (The Museum of Modern Art) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NpWxl4C0OWU.mp4/NpWxl4C0OWU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NpWxl4C0OWU.mp4/NpWxl4C0OWU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NpWxl4C0OWU.m3u8/NpWxl4C0OWU.m3u8"}, "slug": "mondrian-composition-no-ii-with-red-and-blue-1929", "video_id": "NpWxl4C0OWU", "youtube_id": "NpWxl4C0OWU", "readable_id": "mondrian-composition-no-ii-with-red-and-blue-1929"}, "jDIj0CUjGvM": {"duration": 173, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-more-fewer-100/more-word-problems/", "keywords": "", "id": "jDIj0CUjGvM", "title": "\"More\" word problems", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jDIj0CUjGvM.mp4/jDIj0CUjGvM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jDIj0CUjGvM.mp4/jDIj0CUjGvM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jDIj0CUjGvM.m3u8/jDIj0CUjGvM.m3u8"}, "slug": "more-word-problems", "video_id": "jDIj0CUjGvM", "youtube_id": "jDIj0CUjGvM", "readable_id": "more-word-problems"}, "Lmd_CDwBXFs": {"duration": 167, "path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/another-quantitative-easing-video/", "keywords": "federal, reserve, Ben, Bernanke", "id": "Lmd_CDwBXFs", "title": "Another quantitative easing video", "description": "More on quantitative easing", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Lmd_CDwBXFs.mp4/Lmd_CDwBXFs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Lmd_CDwBXFs.mp4/Lmd_CDwBXFs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Lmd_CDwBXFs.m3u8/Lmd_CDwBXFs.m3u8"}, "slug": "another-quantitative-easing-video", "video_id": "Lmd_CDwBXFs", "youtube_id": "Lmd_CDwBXFs", "readable_id": "another-quantitative-easing-video"}, "TJeUOPc9pgs": {"duration": 448, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/hemorrhagic-strokes/", "keywords": "", "id": "TJeUOPc9pgs", "title": "Hemorrhagic strokes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TJeUOPc9pgs.mp4/TJeUOPc9pgs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TJeUOPc9pgs.mp4/TJeUOPc9pgs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TJeUOPc9pgs.m3u8/TJeUOPc9pgs.m3u8"}, "slug": "hemorrhagic-strokes", "video_id": "TJeUOPc9pgs", "youtube_id": "TJeUOPc9pgs", "readable_id": "hemorrhagic-strokes"}, "LsNwC7LpY50": {"duration": 37, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/indicating-electrolysis/electrolysis-intro-hd-720p/", "keywords": "", "id": "LsNwC7LpY50", "title": "Introduction: Breaking up water isn't hard to do", "description": "Break up water into hydrogen and oxygen gas with a simple electrolysis device. Then, use an acid-base indicator and a magnet to create groovy swirls of color.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LsNwC7LpY50.mp4/LsNwC7LpY50.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LsNwC7LpY50.mp4/LsNwC7LpY50.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LsNwC7LpY50.m3u8/LsNwC7LpY50.m3u8"}, "slug": "electrolysis-intro-hd-720p", "video_id": "LsNwC7LpY50", "youtube_id": "LsNwC7LpY50", "readable_id": "electrolysis-intro-hd-720p"}, "3_-hYeuJTzQ": {"duration": 250, "path": "khan/humanities/renaissance-reformation/mannerism1/el-greco-adoration-of-the-shepherds-c-1612-14/", "keywords": "El Greco, Smarthistory, Art History, Baroque", "id": "3_-hYeuJTzQ", "title": "El Greco, Adoration of the Shepherds", "description": "El Greco (Domenikos Theotokopoulos), Adoration of the Shepherds, ca. 1612 - 1614, oil on canvas, 126 x 71 in. (319 x 180 cm), (Museo Nacional del Prado, Madrid) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3_-hYeuJTzQ.mp4/3_-hYeuJTzQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3_-hYeuJTzQ.mp4/3_-hYeuJTzQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3_-hYeuJTzQ.m3u8/3_-hYeuJTzQ.m3u8"}, "slug": "el-greco-adoration-of-the-shepherds-c-1612-14", "video_id": "3_-hYeuJTzQ", "youtube_id": "3_-hYeuJTzQ", "readable_id": "el-greco-adoration-of-the-shepherds-c-1612-14"}, "pAjluTxSYgY": {"duration": 568, "path": "khan/science/chemistry/chemical-bonds/types-chemical-bonds/metallic-nature-trends/", "keywords": "", "id": "pAjluTxSYgY", "title": "Metallic nature", "description": "Properties of metals and how we can explain their properties using electron \"sea\" model.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pAjluTxSYgY.mp4/pAjluTxSYgY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pAjluTxSYgY.mp4/pAjluTxSYgY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pAjluTxSYgY.m3u8/pAjluTxSYgY.m3u8"}, "slug": "metallic-nature-trends", "video_id": "pAjluTxSYgY", "youtube_id": "pAjluTxSYgY", "readable_id": "metallic-nature-trends"}, "Rb7NsHUw384": {"duration": 198, "path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/room-1760-1780/", "keywords": "Tate, ", "id": "Rb7NsHUw384", "title": "Room: 1760-1780", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Greg Sullivan explores the period 1760-1780.\n\nLearn more about the art featured in this video:\n-\u00a0Sir Joshua Reynolds, Colonel Acland and Lord Sydney: The Archers, 1769\n-\u00a0Benjamin West, Pylades and Orestes Brought as Victims before Iphigenia, 1766\n-\u00a0Nathaniel Hone, Sketch for \u2018The Conjuror\u2019. 1775", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Rb7NsHUw384.mp4/Rb7NsHUw384.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Rb7NsHUw384.mp4/Rb7NsHUw384.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Rb7NsHUw384.m3u8/Rb7NsHUw384.m3u8"}, "slug": "room-1760-1780", "video_id": "Rb7NsHUw384", "youtube_id": "Rb7NsHUw384", "readable_id": "room-1760-1780"}, "bTz_tx460EY": {"duration": 176, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-scenarios-tutorial/stagflation/", "keywords": "inflation, deflation, stagnation, finance", "id": "bTz_tx460EY", "title": "Stagflation", "description": "How a supply shock can cause prices to rise and the economy to stagnate", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bTz_tx460EY.mp4/bTz_tx460EY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bTz_tx460EY.mp4/bTz_tx460EY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bTz_tx460EY.m3u8/bTz_tx460EY.m3u8"}, "slug": "stagflation", "video_id": "bTz_tx460EY", "youtube_id": "bTz_tx460EY", "readable_id": "stagflation"}, "2UTr46btzaY": {"duration": 306, "path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/tetrahedral-bond-angle-proof/", "keywords": "", "id": "2UTr46btzaY", "title": "Tetrahedral bond angle proof", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2UTr46btzaY.mp4/2UTr46btzaY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2UTr46btzaY.mp4/2UTr46btzaY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2UTr46btzaY.m3u8/2UTr46btzaY.m3u8"}, "slug": "tetrahedral-bond-angle-proof", "video_id": "2UTr46btzaY", "youtube_id": "2UTr46btzaY", "readable_id": "tetrahedral-bond-angle-proof"}, "XOAn5z8mkvI": {"duration": 227, "path": "khan/math/algebra/linear_inequalities/inequalities/multi-step-inequalities-2/", "keywords": "u10_l2_t2_we2, Multi-Step, Inequalities, CC_6_EE_8, CC_6_NS_6_c, CC_6_NS_7_a, CC_7_EE_4, CC_39336_A-CED_1, CC_39336_A-CED_3", "id": "XOAn5z8mkvI", "title": "Multi-step inequalities 2", "description": "Multi-Step Inequalities 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XOAn5z8mkvI.mp4/XOAn5z8mkvI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XOAn5z8mkvI.mp4/XOAn5z8mkvI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XOAn5z8mkvI.m3u8/XOAn5z8mkvI.m3u8"}, "slug": "multi-step-inequalities-2", "video_id": "XOAn5z8mkvI", "youtube_id": "XOAn5z8mkvI", "readable_id": "multi-step-inequalities-2"}, "usH9VUi2-Xg": {"duration": 383, "path": "khan/math/multivariable-calculus/surface-integrals/3d_flux/constructing-a-unit-normal-vector-to-a-surface/", "keywords": "surface, integral", "id": "usH9VUi2-Xg", "title": "Constructing a unit normal vector to a surface", "description": "Deriving a unit normal vector from the surface parametrization", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/usH9VUi2-Xg.mp4/usH9VUi2-Xg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/usH9VUi2-Xg.mp4/usH9VUi2-Xg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/usH9VUi2-Xg.m3u8/usH9VUi2-Xg.m3u8"}, "slug": "constructing-a-unit-normal-vector-to-a-surface", "video_id": "usH9VUi2-Xg", "youtube_id": "usH9VUi2-Xg", "readable_id": "constructing-a-unit-normal-vector-to-a-surface"}, "W9B3VYdC5T8": {"duration": 324, "path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/sum-of-the-exterior-angles-of-convex-polygon/", "keywords": "geometry, angles, sum", "id": "W9B3VYdC5T8", "title": "Sum of the exterior angles of convex polygon", "description": "More elegant way to find the sum of the exterior angles of a convex polygon", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W9B3VYdC5T8.mp4/W9B3VYdC5T8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W9B3VYdC5T8.mp4/W9B3VYdC5T8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W9B3VYdC5T8.m3u8/W9B3VYdC5T8.m3u8"}, "slug": "sum-of-the-exterior-angles-of-convex-polygon", "video_id": "W9B3VYdC5T8", "youtube_id": "W9B3VYdC5T8", "readable_id": "sum-of-the-exterior-angles-of-convex-polygon"}, "9uwLgf84p5w": {"duration": 201, "path": "khan/math/pre-algebra/measurement/perimeter/introduction-to-perimeter/", "keywords": "", "id": "9uwLgf84p5w", "title": "Introduction to perimeter", "description": "Find perimeter by adding side-lengths of various figures.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9uwLgf84p5w.mp4/9uwLgf84p5w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9uwLgf84p5w.mp4/9uwLgf84p5w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9uwLgf84p5w.m3u8/9uwLgf84p5w.m3u8"}, "slug": "introduction-to-perimeter", "video_id": "9uwLgf84p5w", "youtube_id": "9uwLgf84p5w", "readable_id": "introduction-to-perimeter"}, "HdqbCvqTb20": {"duration": 558, "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/historic-ad-as-scenarios/demand-pull-inflation-under-johnson/", "keywords": "macroeconomics, demand-pull, inflation", "id": "HdqbCvqTb20", "title": "Demand-pull inflation under Johnson", "description": "Thinking about whether inflation in the late 1960s is consistent with the AD-AS model", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HdqbCvqTb20.mp4/HdqbCvqTb20.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HdqbCvqTb20.mp4/HdqbCvqTb20.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HdqbCvqTb20.m3u8/HdqbCvqTb20.m3u8"}, "slug": "demand-pull-inflation-under-johnson", "video_id": "HdqbCvqTb20", "youtube_id": "HdqbCvqTb20", "readable_id": "demand-pull-inflation-under-johnson"}, "0gXdtpz9GN4": {"duration": 71, "path": "khan/college-admissions/explore-college-options/college-search-type-of-college/comparing-nonprofit-vs-for-profit-colleges/", "keywords": "", "id": "0gXdtpz9GN4", "title": "Comparing nonprofit vs. for profit colleges", "description": "Find average debt-levels and graduation rates at nonprofit and for profit colleges", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0gXdtpz9GN4.mp4/0gXdtpz9GN4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0gXdtpz9GN4.mp4/0gXdtpz9GN4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0gXdtpz9GN4.m3u8/0gXdtpz9GN4.m3u8"}, "slug": "comparing-nonprofit-vs-for-profit-colleges", "video_id": "0gXdtpz9GN4", "youtube_id": "0gXdtpz9GN4", "readable_id": "comparing-nonprofit-vs-for-profit-colleges"}, "dZPOCU10TqY": {"duration": 150, "path": "khan/math/pre-algebra/order-of-operations/place_value/comparing-place-values/", "keywords": "", "id": "dZPOCU10TqY", "title": "Comparing place values", "description": "When asked to compare the place values in a number, remember this simple fact: each step up in place value results in an increase of a factor of ten. Watch this great explanation and become a pro.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dZPOCU10TqY.mp4/dZPOCU10TqY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dZPOCU10TqY.mp4/dZPOCU10TqY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dZPOCU10TqY.m3u8/dZPOCU10TqY.m3u8"}, "slug": "comparing-place-values", "video_id": "dZPOCU10TqY", "youtube_id": "dZPOCU10TqY", "readable_id": "comparing-place-values"}, "zIcxrhyJs6M": {"duration": 294, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/more-equation-practice/patterns-in-sequences-2/", "keywords": "U03_L1_T1_we2, Patterns, in, Sequences, CC_39336_F-BF_2", "id": "zIcxrhyJs6M", "title": "Patterns in sequences 2", "description": "Patterns in Sequences 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zIcxrhyJs6M.mp4/zIcxrhyJs6M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zIcxrhyJs6M.mp4/zIcxrhyJs6M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zIcxrhyJs6M.m3u8/zIcxrhyJs6M.m3u8"}, "slug": "patterns-in-sequences-2", "video_id": "zIcxrhyJs6M", "youtube_id": "zIcxrhyJs6M", "readable_id": "patterns-in-sequences-2"}, "B8OUL9QYNpI": {"duration": 133, "path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-april-12-2013-mars-bygone-atmosphere/", "keywords": "", "id": "B8OUL9QYNpI", "title": "Mars' bygone atmosphere", "description": "NASA's Curiosity finds that the Red Planet doesn't have the same atmosphere it used to.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/B8OUL9QYNpI.mp4/B8OUL9QYNpI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/B8OUL9QYNpI.mp4/B8OUL9QYNpI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/B8OUL9QYNpI.m3u8/B8OUL9QYNpI.m3u8"}, "slug": "curiosity-rover-report-april-12-2013-mars-bygone-atmosphere", "video_id": "B8OUL9QYNpI", "youtube_id": "B8OUL9QYNpI", "readable_id": "curiosity-rover-report-april-12-2013-mars-bygone-atmosphere"}, "H-qREcJqUhY": {"duration": 779, "path": "khan/science/health-and-medicine/lab-values/calculate-your-own-osmolarity/", "keywords": "", "id": "H-qREcJqUhY", "title": "Calculate your own osmolarity", "description": "Learn how to use three lab values (Sodium, glucose, and BUN) to approximate your plasma osmolarity. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H-qREcJqUhY.mp4/H-qREcJqUhY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H-qREcJqUhY.mp4/H-qREcJqUhY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H-qREcJqUhY.m3u8/H-qREcJqUhY.m3u8"}, "slug": "calculate-your-own-osmolarity", "video_id": "H-qREcJqUhY", "youtube_id": "H-qREcJqUhY", "readable_id": "calculate-your-own-osmolarity"}, "jM-gvSqsP5A": {"duration": 305, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/action-potential-patterns/", "keywords": "", "id": "jM-gvSqsP5A", "title": "Action potential patterns", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jM-gvSqsP5A.mp4/jM-gvSqsP5A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jM-gvSqsP5A.mp4/jM-gvSqsP5A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jM-gvSqsP5A.m3u8/jM-gvSqsP5A.m3u8"}, "slug": "action-potential-patterns", "video_id": "jM-gvSqsP5A", "youtube_id": "jM-gvSqsP5A", "readable_id": "action-potential-patterns"}, "08gsb8p--JM": {"duration": 149, "path": "khan/college-admissions/applying-to-college/admissions-essays/ss-admissions-essay-meaningful-poem/", "keywords": "", "id": "08gsb8p--JM", "title": "Student story: Admissions essay about a meaningful poem", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/08gsb8p--JM.mp4/08gsb8p--JM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/08gsb8p--JM.mp4/08gsb8p--JM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/08gsb8p--JM.m3u8/08gsb8p--JM.m3u8"}, "slug": "ss-admissions-essay-meaningful-poem", "video_id": "08gsb8p--JM", "youtube_id": "08gsb8p--JM", "readable_id": "ss-admissions-essay-meaningful-poem"}, "xoXYirs2Mzw": {"duration": 152, "path": "khan/math/pre-algebra/fractions-pre-alg/div-fractions-fractions-pre-alg/dividing-a-whole-number-by-a-fraction-word-problem/", "keywords": "", "id": "xoXYirs2Mzw", "title": "Dividing whole numbers and fractions: potpourri", "description": "Solve a word problem by dividing a whole number by a fraction. The example used in this video is 4 \u00f7 1/5.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xoXYirs2Mzw.mp4/xoXYirs2Mzw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xoXYirs2Mzw.mp4/xoXYirs2Mzw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xoXYirs2Mzw.m3u8/xoXYirs2Mzw.m3u8"}, "slug": "dividing-a-whole-number-by-a-fraction-word-problem", "video_id": "xoXYirs2Mzw", "youtube_id": "xoXYirs2Mzw", "readable_id": "dividing-a-whole-number-by-a-fraction-word-problem"}, "mQh5ku9dyJQ": {"duration": 726, "path": "khan/test-prep/mcat/biomolecules/dna/transcription-1/", "keywords": "", "id": "mQh5ku9dyJQ", "title": "Transcription 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mQh5ku9dyJQ.mp4/mQh5ku9dyJQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mQh5ku9dyJQ.mp4/mQh5ku9dyJQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mQh5ku9dyJQ.m3u8/mQh5ku9dyJQ.m3u8"}, "slug": "transcription-1", "video_id": "mQh5ku9dyJQ", "youtube_id": "mQh5ku9dyJQ", "readable_id": "transcription-1"}, "8x8tA4YPhJw": {"duration": 587, "path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/formal-charge-on-oxygen/", "keywords": "", "id": "8x8tA4YPhJw", "title": "Formal charge on oxygen", "description": "How to calculate the formal charge on oxygen", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8x8tA4YPhJw.mp4/8x8tA4YPhJw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8x8tA4YPhJw.mp4/8x8tA4YPhJw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8x8tA4YPhJw.m3u8/8x8tA4YPhJw.m3u8"}, "slug": "formal-charge-on-oxygen", "video_id": "8x8tA4YPhJw", "youtube_id": "8x8tA4YPhJw", "readable_id": "formal-charge-on-oxygen"}, "qCs7HPSDL8A": {"duration": 441, "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/clinical-progression-of-multiple-sclerosis/", "keywords": "", "id": "qCs7HPSDL8A", "title": "Clinical progression of multiple sclerosis", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qCs7HPSDL8A.mp4/qCs7HPSDL8A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qCs7HPSDL8A.mp4/qCs7HPSDL8A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qCs7HPSDL8A.m3u8/qCs7HPSDL8A.m3u8"}, "slug": "clinical-progression-of-multiple-sclerosis", "video_id": "qCs7HPSDL8A", "youtube_id": "qCs7HPSDL8A", "readable_id": "clinical-progression-of-multiple-sclerosis"}, "o4pbAQgJYjI": {"duration": 356, "path": "khan/math/algebra/systems-of-linear-equations/graphical-representation-of-systems-of-equations/solving-systems-graphically-examples/", "keywords": "education,online learning,learning,lessons,systems of equations,algebra,Lesson,Math", "id": "o4pbAQgJYjI", "title": "How to solve a system of linear equations, both exactly and approximately (example)", "description": "Sal solves a system of two linear equations in standard form, and then approximates the solution of a system whose solution isn't clearly visible.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o4pbAQgJYjI.mp4/o4pbAQgJYjI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o4pbAQgJYjI.mp4/o4pbAQgJYjI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o4pbAQgJYjI.m3u8/o4pbAQgJYjI.m3u8"}, "slug": "solving-systems-graphically-examples", "video_id": "o4pbAQgJYjI", "youtube_id": "o4pbAQgJYjI", "readable_id": "solving-systems-graphically-examples"}, "Thvc2s9aUP4": {"duration": 511, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/generalizing-the-washer-method/", "keywords": "", "id": "Thvc2s9aUP4", "title": "Generalizing the washer method", "description": "Looking at the example from the last video in a more generalized way", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Thvc2s9aUP4.mp4/Thvc2s9aUP4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Thvc2s9aUP4.mp4/Thvc2s9aUP4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Thvc2s9aUP4.m3u8/Thvc2s9aUP4.m3u8"}, "slug": "generalizing-the-washer-method", "video_id": "Thvc2s9aUP4", "youtube_id": "Thvc2s9aUP4", "readable_id": "generalizing-the-washer-method"}, "cjYHo2tS9sQ": {"duration": 379, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2008-may-8-10-11/", "keywords": "", "id": "cjYHo2tS9sQ", "title": "10 11 Calling plan", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cjYHo2tS9sQ.mp4/cjYHo2tS9sQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cjYHo2tS9sQ.mp4/cjYHo2tS9sQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cjYHo2tS9sQ.m3u8/cjYHo2tS9sQ.m3u8"}, "slug": "sat-2008-may-8-10-11", "video_id": "cjYHo2tS9sQ", "youtube_id": "cjYHo2tS9sQ", "readable_id": "sat-2008-may-8-10-11"}, "eQzbpL0uWVA": {"duration": 415, "path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/electrophilic-aromatic-substitution-mechanism/", "keywords": "", "id": "eQzbpL0uWVA", "title": "Electrophilic aromatic substitution mechanism", "description": "The general reaction and mechanism of Electrophilic Aromatic Substitution", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eQzbpL0uWVA.mp4/eQzbpL0uWVA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eQzbpL0uWVA.mp4/eQzbpL0uWVA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eQzbpL0uWVA.m3u8/eQzbpL0uWVA.m3u8"}, "slug": "electrophilic-aromatic-substitution-mechanism", "video_id": "eQzbpL0uWVA", "youtube_id": "eQzbpL0uWVA", "readable_id": "electrophilic-aromatic-substitution-mechanism"}, "d9alWZRzBWk": {"duration": 206, "path": "khan/computing/computer-science/informationtheory/info-theory/intro-information-theory/", "keywords": "information theory, brit cruise", "id": "d9alWZRzBWk", "title": "What is information theory?", "description": "A broad introduction to this field of study", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/d9alWZRzBWk.mp4/d9alWZRzBWk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/d9alWZRzBWk.mp4/d9alWZRzBWk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/d9alWZRzBWk.m3u8/d9alWZRzBWk.m3u8"}, "slug": "intro-information-theory", "video_id": "d9alWZRzBWk", "youtube_id": "d9alWZRzBWk", "readable_id": "intro-information-theory"}, "I356lV1v8Bc": {"duration": 614, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/giotto-arena-scrovegni-chapel-part-2-of-4/", "keywords": "Giotto, Scrovegni, Arena Chapel, fresco, art, painting, narrative", "id": "I356lV1v8Bc", "title": "Giotto, Arena (Scrovegni) Chapel (part 2)", "description": "Part 2: The Narrative Cycle from Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I356lV1v8Bc.mp4/I356lV1v8Bc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I356lV1v8Bc.mp4/I356lV1v8Bc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I356lV1v8Bc.m3u8/I356lV1v8Bc.m3u8"}, "slug": "giotto-arena-scrovegni-chapel-part-2-of-4", "video_id": "I356lV1v8Bc", "youtube_id": "I356lV1v8Bc", "readable_id": "giotto-arena-scrovegni-chapel-part-2-of-4"}, "IzyheHIPBXU": {"duration": 69, "path": "khan/science/discoveries-projects/discoveries/magnetism/discovery-of-magnetism/", "keywords": "compass", "id": "IzyheHIPBXU", "title": "Discovery of magnetism", "description": "Our ancestors noticed that certain rocks were attracted to each other. They also noticed that this force could be transferred onto certain metallic objects!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IzyheHIPBXU.mp4/IzyheHIPBXU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IzyheHIPBXU.mp4/IzyheHIPBXU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IzyheHIPBXU.m3u8/IzyheHIPBXU.m3u8"}, "slug": "discovery-of-magnetism", "video_id": "IzyheHIPBXU", "youtube_id": "IzyheHIPBXU", "readable_id": "discovery-of-magnetism"}, "T_mFhtBja5A": {"duration": 324, "path": "khan/test-prep/mcat/chemical-processes/proteins/alpha-amino-acid-synthesis/", "keywords": "", "id": "T_mFhtBja5A", "title": "Alpha amino acid synthesis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T_mFhtBja5A.mp4/T_mFhtBja5A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T_mFhtBja5A.mp4/T_mFhtBja5A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T_mFhtBja5A.m3u8/T_mFhtBja5A.m3u8"}, "slug": "alpha-amino-acid-synthesis", "video_id": "T_mFhtBja5A", "youtube_id": "T_mFhtBja5A", "readable_id": "alpha-amino-acid-synthesis"}, "94xKRkCHlv0": {"duration": 338, "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/leonardo-da-vinci-the-virgin-of-the-rocks-c-1491-1508/", "keywords": "Leonardo, London, National Gallery, Virgin of the Rocks, Renaissance, Leonardo da Vinci, Smarthistory, Art History, History of Art, High Renaissance", "id": "94xKRkCHlv0", "title": "Leonardo, Virgin of the Rocks", "description": "Leonardo da Vinci, The Virgin of the Rocks, c. 1491-1508, oil on panel, 189.5 x 120 cm\u00a0(The National Gallery, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/94xKRkCHlv0.mp4/94xKRkCHlv0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/94xKRkCHlv0.mp4/94xKRkCHlv0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/94xKRkCHlv0.m3u8/94xKRkCHlv0.m3u8"}, "slug": "leonardo-da-vinci-the-virgin-of-the-rocks-c-1491-1508", "video_id": "94xKRkCHlv0", "youtube_id": "94xKRkCHlv0", "readable_id": "leonardo-da-vinci-the-virgin-of-the-rocks-c-1491-1508"}, "YghRP8S2K-4": {"duration": 415, "path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/applying-radical-equations-2/", "keywords": "U07_L3_T3_we2, Applying, Radical, Equations, CC_6_EE_2_c, CC_6_G_4, CC_8_EE_2, CC_39336_A-REI_2", "id": "YghRP8S2K-4", "title": "Applying radical equations 2", "description": "Applying Radical Equations 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YghRP8S2K-4.mp4/YghRP8S2K-4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YghRP8S2K-4.mp4/YghRP8S2K-4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YghRP8S2K-4.m3u8/YghRP8S2K-4.m3u8"}, "slug": "applying-radical-equations-2", "video_id": "YghRP8S2K-4", "youtube_id": "YghRP8S2K-4", "readable_id": "applying-radical-equations-2"}, "LoaBd-sPzkU": {"duration": 505, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-perimeter-area/perimeter-and-area-basics/", "keywords": "Perimeter, and, Area, Basics", "id": "LoaBd-sPzkU", "title": "Perimeter and area: the basics", "description": "Great geometry primer on perimeter and area. Listen carefully. Sal explains the concepts so you'll understand them.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LoaBd-sPzkU.mp4/LoaBd-sPzkU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LoaBd-sPzkU.mp4/LoaBd-sPzkU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LoaBd-sPzkU.m3u8/LoaBd-sPzkU.m3u8"}, "slug": "perimeter-and-area-basics", "video_id": "LoaBd-sPzkU", "youtube_id": "LoaBd-sPzkU", "readable_id": "perimeter-and-area-basics"}, "gAV9kwvoD6s": {"duration": 290, "path": "khan/math/pre-algebra/decimals-pre-alg/comparing-decimals-pre-alg/comparing-decimals-1-example/", "keywords": "", "id": "gAV9kwvoD6s", "title": "Comparing decimals example 2", "description": "When comparing decimals it's easy to get confused by the number of digits to the right of decimal. Is it a tenth, hundredth, or thousandth? This video will help you a lot!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gAV9kwvoD6s.mp4/gAV9kwvoD6s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gAV9kwvoD6s.mp4/gAV9kwvoD6s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gAV9kwvoD6s.m3u8/gAV9kwvoD6s.m3u8"}, "slug": "comparing-decimals-1-example", "video_id": "gAV9kwvoD6s", "youtube_id": "gAV9kwvoD6s", "readable_id": "comparing-decimals-1-example"}, "czIYvs9zj2g": {"duration": 1152, "path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/lin-alg-unique-rowspace-solution-to-ax-b/", "keywords": "rowspace, columnspace, solution, Ax=b", "id": "czIYvs9zj2g", "title": "Unique rowspace solution to Ax = b", "description": "Showing that, for any b that is in the column space of A, there is a unique member of the row space that is the \"smallest\" solution to Ax=b", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/czIYvs9zj2g.mp4/czIYvs9zj2g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/czIYvs9zj2g.mp4/czIYvs9zj2g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/czIYvs9zj2g.m3u8/czIYvs9zj2g.m3u8"}, "slug": "lin-alg-unique-rowspace-solution-to-ax-b", "video_id": "czIYvs9zj2g", "youtube_id": "czIYvs9zj2g", "readable_id": "lin-alg-unique-rowspace-solution-to-ax-b"}, "psLX080RQR8": {"duration": 950, "path": "khan/science/chemistry/chemical-equilibrium/equilibrium-constant/keq-derivation-intuition-can-skip-bit-mathy/", "keywords": "chemistry, haber, equilibrium", "id": "psLX080RQR8", "title": "Keq derivation intuition (can skip; bit mathy)", "description": "A more concrete attempt at showing how the probabilities of molecules reacting is related to their concentration.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/psLX080RQR8.mp4/psLX080RQR8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/psLX080RQR8.mp4/psLX080RQR8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/psLX080RQR8.m3u8/psLX080RQR8.m3u8"}, "slug": "keq-derivation-intuition-can-skip-bit-mathy", "video_id": "psLX080RQR8", "youtube_id": "psLX080RQR8", "readable_id": "keq-derivation-intuition-can-skip-bit-mathy"}, "wuxjTxxQUTs": {"duration": 433, "path": "khan/test-prep/ap-art-history/global-contemporary/mayalin-vietnamvetmem/", "keywords": "Maya Lin, Vietnam, Veterans, Memorial, war, Washington", "id": "wuxjTxxQUTs", "title": "Maya Lin, Vietnam Veterans Memorial", "description": "Maya Lin, Vietnam Veterans Memorial, 1982, granite, 2 acres\u00a0within\u00a0Constitution Gardens, (National Mall, Washington, D.C.),\u00a0speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wuxjTxxQUTs.mp4/wuxjTxxQUTs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wuxjTxxQUTs.mp4/wuxjTxxQUTs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wuxjTxxQUTs.m3u8/wuxjTxxQUTs.m3u8"}, "slug": "mayalin-vietnamvetmem", "video_id": "wuxjTxxQUTs", "youtube_id": "wuxjTxxQUTs", "readable_id": "mayalin-vietnamvetmem"}, "ruAXk6RnkG8": {"duration": 169, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-skip-counting/skip-counting-by-100-example/", "keywords": "", "id": "ruAXk6RnkG8", "title": "Skip counting by 100 example", "description": "Learn to count by hundreds.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ruAXk6RnkG8.mp4/ruAXk6RnkG8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ruAXk6RnkG8.mp4/ruAXk6RnkG8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ruAXk6RnkG8.m3u8/ruAXk6RnkG8.m3u8"}, "slug": "skip-counting-by-100-example", "video_id": "ruAXk6RnkG8", "youtube_id": "ruAXk6RnkG8", "readable_id": "skip-counting-by-100-example"}, "xl6NSugEqh4": {"duration": 625, "path": "khan/partner-content/big-history-project/life/life-and-big-history/bhp-whatislife/", "keywords": "", "id": "xl6NSugEqh4", "title": "What is Life?", "description": "Defining life is harder than it seems. Consider its characteristics and the importance of DNA in evolution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xl6NSugEqh4.mp4/xl6NSugEqh4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xl6NSugEqh4.mp4/xl6NSugEqh4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xl6NSugEqh4.m3u8/xl6NSugEqh4.m3u8"}, "slug": "bhp-whatislife", "video_id": "xl6NSugEqh4", "youtube_id": "xl6NSugEqh4", "readable_id": "bhp-whatislife"}, "i7iKLZQ-vCk": {"duration": 376, "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/sum-of-n-squares-1/", "keywords": "", "id": "i7iKLZQ-vCk", "title": "Finding the sum of n squares part 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i7iKLZQ-vCk.mp4/i7iKLZQ-vCk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i7iKLZQ-vCk.mp4/i7iKLZQ-vCk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i7iKLZQ-vCk.m3u8/i7iKLZQ-vCk.m3u8"}, "slug": "sum-of-n-squares-1", "video_id": "i7iKLZQ-vCk", "youtube_id": "i7iKLZQ-vCk", "readable_id": "sum-of-n-squares-1"}, "y2-uaPiyoxc": {"duration": 56, "path": "khan/math/early-math/cc-early-math-counting-topic/cc-early-math-counting/counting-with-small-numbers/", "keywords": "", "id": "y2-uaPiyoxc", "title": "Counting with small numbers", "description": "Learn how to count squirrels and horses.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y2-uaPiyoxc.mp4/y2-uaPiyoxc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y2-uaPiyoxc.mp4/y2-uaPiyoxc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y2-uaPiyoxc.m3u8/y2-uaPiyoxc.m3u8"}, "slug": "counting-with-small-numbers", "video_id": "y2-uaPiyoxc", "youtube_id": "y2-uaPiyoxc", "readable_id": "counting-with-small-numbers"}, "xgTpGASqrKY": {"duration": 249, "path": "khan/humanities/ancient-art-civilizations/roman/early-empire/the-art-of-gem-carving/", "keywords": "", "id": "xgTpGASqrKY", "title": "The art of gem carving", "description": "Since antiquity, gemstones have been engraved using the same methods. Watch the process from start to finish as a gem carver recreates an ancient image. Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xgTpGASqrKY.mp4/xgTpGASqrKY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xgTpGASqrKY.mp4/xgTpGASqrKY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xgTpGASqrKY.m3u8/xgTpGASqrKY.m3u8"}, "slug": "the-art-of-gem-carving", "video_id": "xgTpGASqrKY", "youtube_id": "xgTpGASqrKY", "readable_id": "the-art-of-gem-carving"}, "tRC0HZyNCW4": {"duration": 141, "path": "khan/college-admissions/applying-to-college/admissions-essays/writing-a-strong-college-admissions-essay/", "keywords": "", "id": "tRC0HZyNCW4", "title": "Writing a strong college admissions essay", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tRC0HZyNCW4.mp4/tRC0HZyNCW4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tRC0HZyNCW4.mp4/tRC0HZyNCW4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tRC0HZyNCW4.m3u8/tRC0HZyNCW4.m3u8"}, "slug": "writing-a-strong-college-admissions-essay", "video_id": "tRC0HZyNCW4", "youtube_id": "tRC0HZyNCW4", "readable_id": "writing-a-strong-college-admissions-essay"}, "M_VqY1rf3UA": {"duration": 1016, "path": "khan/science/physics/forces-newtons-laws/tension-tutorial/super-hot-tension/", "keywords": "", "id": "M_VqY1rf3UA", "title": "Super hot tension", "description": "David shows how to solve a super hot tension problem where a can of peppers hangs from two diagonal strings.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M_VqY1rf3UA.mp4/M_VqY1rf3UA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M_VqY1rf3UA.mp4/M_VqY1rf3UA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M_VqY1rf3UA.m3u8/M_VqY1rf3UA.m3u8"}, "slug": "super-hot-tension", "video_id": "M_VqY1rf3UA", "youtube_id": "M_VqY1rf3UA", "readable_id": "super-hot-tension"}, "A_8yPgC9zQc": {"duration": 378, "path": "khan/humanities/art-history-basics/art-1010/ancient-near-eastern-and-ancient-egyptian-art/", "keywords": "", "id": "A_8yPgC9zQc", "title": "Ancient Near Eastern and ancient Egyptian art", "description": "From the Utah System of Higher Education (with special thanks to Dr. Nancy Ross). Video by Ydraw.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A_8yPgC9zQc.mp4/A_8yPgC9zQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A_8yPgC9zQc.mp4/A_8yPgC9zQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A_8yPgC9zQc.m3u8/A_8yPgC9zQc.m3u8"}, "slug": "ancient-near-eastern-and-ancient-egyptian-art", "video_id": "A_8yPgC9zQc", "youtube_id": "A_8yPgC9zQc", "readable_id": "ancient-near-eastern-and-ancient-egyptian-art"}, "A52fEdPn9lg": {"duration": 635, "path": "khan/math/precalculus/partial-fraction-expans/partial-fraction/partial-fraction-expansion-3/", "keywords": "partial, fraction, expansion, decomposition, CC_39336_A-APR_6", "id": "A52fEdPn9lg", "title": "Partial fraction expansion 3", "description": "Dealing with repeated factors", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A52fEdPn9lg.mp4/A52fEdPn9lg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A52fEdPn9lg.mp4/A52fEdPn9lg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A52fEdPn9lg.m3u8/A52fEdPn9lg.m3u8"}, "slug": "partial-fraction-expansion-3", "video_id": "A52fEdPn9lg", "youtube_id": "A52fEdPn9lg", "readable_id": "partial-fraction-expansion-3"}, "AXv9B0bcZ1A": {"duration": 848, "path": "khan/partner-content/brookings-institution/introduction-to-healthcare/medicaid/", "keywords": "", "id": "AXv9B0bcZ1A", "title": "Medicaid", "description": "Medicaid is a federal/state partnership that provides health insurance and other services for low-income families and other eligible people. Learn what services are covered and how states are involved to fund and administer the program.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AXv9B0bcZ1A.mp4/AXv9B0bcZ1A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AXv9B0bcZ1A.mp4/AXv9B0bcZ1A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AXv9B0bcZ1A.m3u8/AXv9B0bcZ1A.m3u8"}, "slug": "medicaid", "video_id": "AXv9B0bcZ1A", "youtube_id": "AXv9B0bcZ1A", "readable_id": "medicaid"}, "NTUjMpfYWwE": {"duration": 234, "path": "khan/humanities/history/euro-hist/other-fronts-ww1/japan-in-world-war-i/", "keywords": "", "id": "NTUjMpfYWwE", "title": "Japan in World War I", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NTUjMpfYWwE.mp4/NTUjMpfYWwE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NTUjMpfYWwE.mp4/NTUjMpfYWwE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NTUjMpfYWwE.m3u8/NTUjMpfYWwE.m3u8"}, "slug": "japan-in-world-war-i", "video_id": "NTUjMpfYWwE", "youtube_id": "NTUjMpfYWwE", "readable_id": "japan-in-world-war-i"}, "xPUm5SUVzTE": {"duration": 541, "path": "khan/math/precalculus/prob_comb/dependent_events_precalc/dependent-probability-example-1/", "keywords": "probability, coins, unfair", "id": "xPUm5SUVzTE", "title": "Dependent probability example", "description": "We're thinking about how the probability of an event can be dependent on another event occuring in this example problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xPUm5SUVzTE.mp4/xPUm5SUVzTE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xPUm5SUVzTE.mp4/xPUm5SUVzTE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xPUm5SUVzTE.m3u8/xPUm5SUVzTE.m3u8"}, "slug": "dependent-probability-example-1", "video_id": "xPUm5SUVzTE", "youtube_id": "xPUm5SUVzTE", "readable_id": "dependent-probability-example-1"}, "TSTLLFJbaA4": {"duration": 445, "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/externalities-topic/positive-externalities/", "keywords": "microeconomics", "id": "TSTLLFJbaA4", "title": "Positive externalities", "description": "Factoring in external benefits", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TSTLLFJbaA4.mp4/TSTLLFJbaA4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TSTLLFJbaA4.mp4/TSTLLFJbaA4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TSTLLFJbaA4.m3u8/TSTLLFJbaA4.m3u8"}, "slug": "positive-externalities", "video_id": "TSTLLFJbaA4", "youtube_id": "TSTLLFJbaA4", "readable_id": "positive-externalities"}, "I5xcZgyY4ag": {"duration": 117, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-strategies-for-adding-within-100/correct-number-lines-for-addition-and-subtraction/", "keywords": "education,online learning,learning,lessons", "id": "I5xcZgyY4ag", "title": "Correct number lines for addition and subtraction", "description": "Some example exercises where you figure out which number line matches up with an addition or subtraction problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I5xcZgyY4ag.mp4/I5xcZgyY4ag.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I5xcZgyY4ag.mp4/I5xcZgyY4ag.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I5xcZgyY4ag.m3u8/I5xcZgyY4ag.m3u8"}, "slug": "correct-number-lines-for-addition-and-subtraction", "video_id": "I5xcZgyY4ag", "youtube_id": "I5xcZgyY4ag", "readable_id": "correct-number-lines-for-addition-and-subtraction"}, "ajZzavtog9I": {"duration": 355, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p10-easier/", "keywords": "", "id": "ajZzavtog9I", "title": "Interpreting nonlinear expressions \u2014 Basic example", "description": "Watch Sal work through a basic Interpreting nonlinear expressions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ajZzavtog9I.mp4/ajZzavtog9I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ajZzavtog9I.mp4/ajZzavtog9I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ajZzavtog9I.m3u8/ajZzavtog9I.m3u8"}, "slug": "sat-math-p10-easier", "video_id": "ajZzavtog9I", "youtube_id": "ajZzavtog9I", "readable_id": "sat-math-p10-easier"}, "cCMpin3Te4s": {"duration": 400, "path": "khan/math/algebra/linear_inequalities/inequalities/writing-and-using-inequalities-2/", "keywords": "U05_L1_T3_we2, Writing, and, using, inequalities, CC_6_EE_6, CC_6_EE_8, CC_7_EE_4, CC_7_EE_4_b, CC_39336_A-CED_1, CC_39336_A-CED_3, CC_39336_A-REI_3", "id": "cCMpin3Te4s", "title": "Constructing and solving a multi-step inequality example", "description": "Learn how to solve an inequality word problem about cell phone texting plans.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cCMpin3Te4s.mp4/cCMpin3Te4s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cCMpin3Te4s.mp4/cCMpin3Te4s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cCMpin3Te4s.m3u8/cCMpin3Te4s.m3u8"}, "slug": "writing-and-using-inequalities-2", "video_id": "cCMpin3Te4s", "youtube_id": "cCMpin3Te4s", "readable_id": "writing-and-using-inequalities-2"}, "2EwPpga_XPw": {"duration": 321, "path": "khan/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/solving-systems-with-substitution/", "keywords": "", "id": "2EwPpga_XPw", "title": "Talking bird solves systems of equations with substitution", "description": "Sal solves a systems of equations with substitution.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2EwPpga_XPw.mp4/2EwPpga_XPw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2EwPpga_XPw.mp4/2EwPpga_XPw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2EwPpga_XPw.m3u8/2EwPpga_XPw.m3u8"}, "slug": "solving-systems-with-substitution", "video_id": "2EwPpga_XPw", "youtube_id": "2EwPpga_XPw", "readable_id": "solving-systems-with-substitution"}, "AK2aaur00i4": {"duration": 576, "path": "khan/college-admissions/paying-for-college/loans/types-of-college-loans/", "keywords": "", "id": "AK2aaur00i4", "title": "Types of college loans", "description": "Learn more about federal government loans for college", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AK2aaur00i4.mp4/AK2aaur00i4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AK2aaur00i4.mp4/AK2aaur00i4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AK2aaur00i4.m3u8/AK2aaur00i4.m3u8"}, "slug": "types-of-college-loans", "video_id": "AK2aaur00i4", "youtube_id": "AK2aaur00i4", "readable_id": "types-of-college-loans"}, "Lo-ajwD953o": {"duration": 258, "path": "khan/humanities/art-asia/korea-japan/joseon-dynasty/royal-palaces-seoul/", "keywords": "", "id": "Lo-ajwD953o", "title": "Royal palaces of Seoul", "description": "In the heart of Seoul there are several historic palaces that were the residences of Korea's royal family from the 1400's to the mid-1900's. This documentary explores the art and architecture of these royal palaces of Seoul. Learn more about Korean art and culture on the education.asianart.org.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Lo-ajwD953o.mp4/Lo-ajwD953o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Lo-ajwD953o.mp4/Lo-ajwD953o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Lo-ajwD953o.m3u8/Lo-ajwD953o.m3u8"}, "slug": "royal-palaces-seoul", "video_id": "Lo-ajwD953o", "youtube_id": "Lo-ajwD953o", "readable_id": "royal-palaces-seoul"}, "MfWGyjU32Xs": {"duration": 183, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/subject-verb-agreement-harder/", "keywords": "education,online learning,learning,lessons", "id": "MfWGyjU32Xs", "title": "Writing: Subject-verb agreement \u2014 Harder example", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing\u00a0subject-verb agreement.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MfWGyjU32Xs.mp4/MfWGyjU32Xs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MfWGyjU32Xs.mp4/MfWGyjU32Xs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MfWGyjU32Xs.m3u8/MfWGyjU32Xs.m3u8"}, "slug": "subject-verb-agreement-harder", "video_id": "MfWGyjU32Xs", "youtube_id": "MfWGyjU32Xs", "readable_id": "subject-verb-agreement-harder"}, "oug9h9-komI": {"duration": 699, "path": "khan/test-prep/gmat/problem-solving/gmat-math-40/", "keywords": "gmat, math, problem, solving", "id": "oug9h9-komI", "title": "GMAT: Math 40", "description": "198-200, pg. 179", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oug9h9-komI.mp4/oug9h9-komI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oug9h9-komI.mp4/oug9h9-komI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oug9h9-komI.m3u8/oug9h9-komI.m3u8"}, "slug": "gmat-math-40", "video_id": "oug9h9-komI", "youtube_id": "oug9h9-komI", "readable_id": "gmat-math-40"}, "KXwYPD090Tg": {"duration": 555, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-science-questions/", "keywords": "", "id": "KXwYPD090Tg", "title": "Reading: Science \u2014 How-to Part 2", "description": "Watch Sal work through Part 2 of an SAT Reading: Science passage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KXwYPD090Tg.mp4/KXwYPD090Tg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KXwYPD090Tg.mp4/KXwYPD090Tg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KXwYPD090Tg.m3u8/KXwYPD090Tg.m3u8"}, "slug": "reading-science-questions", "video_id": "KXwYPD090Tg", "youtube_id": "KXwYPD090Tg", "readable_id": "reading-science-questions"}, "2h09oj26_H0": {"duration": 776, "path": "khan/science/health-and-medicine/infectious-diseases/influenza/flu-vaccine-risks-and-benefits/", "keywords": "", "id": "2h09oj26_H0", "title": "Flu vaccine risks and benefits", "description": "Learn about some of the common and uncommon risks and benefits associated with the flu vaccine! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2h09oj26_H0.mp4/2h09oj26_H0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2h09oj26_H0.mp4/2h09oj26_H0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2h09oj26_H0.m3u8/2h09oj26_H0.m3u8"}, "slug": "flu-vaccine-risks-and-benefits", "video_id": "2h09oj26_H0", "youtube_id": "2h09oj26_H0", "readable_id": "flu-vaccine-risks-and-benefits"}, "C_H-ONQFjpQ": {"duration": 833, "path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/sodium-potassium-pump/", "keywords": "sodium, potassium, pump, atp, atpase, voltage, gradient", "id": "C_H-ONQFjpQ", "title": "Sodium potassium pump", "description": "How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C_H-ONQFjpQ.mp4/C_H-ONQFjpQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C_H-ONQFjpQ.mp4/C_H-ONQFjpQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C_H-ONQFjpQ.m3u8/C_H-ONQFjpQ.m3u8"}, "slug": "sodium-potassium-pump", "video_id": "C_H-ONQFjpQ", "youtube_id": "C_H-ONQFjpQ", "readable_id": "sodium-potassium-pump"}, "iiGYwCGNrl8": {"duration": 691, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/sn2-reactions/", "keywords": "Sn2, Reactions", "id": "iiGYwCGNrl8", "title": "Sn2 reactions", "description": "Sn2 Reactions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iiGYwCGNrl8.mp4/iiGYwCGNrl8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iiGYwCGNrl8.mp4/iiGYwCGNrl8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iiGYwCGNrl8.m3u8/iiGYwCGNrl8.m3u8"}, "slug": "sn2-reactions", "video_id": "iiGYwCGNrl8", "youtube_id": "iiGYwCGNrl8", "readable_id": "sn2-reactions"}, "aietYaTqBss": {"duration": 196, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-11/", "keywords": "", "id": "aietYaTqBss", "title": "11 Proportion of total votes", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aietYaTqBss.mp4/aietYaTqBss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aietYaTqBss.mp4/aietYaTqBss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aietYaTqBss.m3u8/aietYaTqBss.m3u8"}, "slug": "sat-getting-ready-2-11", "video_id": "aietYaTqBss", "youtube_id": "aietYaTqBss", "readable_id": "sat-getting-ready-2-11"}, "mIx2Oj5y9Q8": {"duration": 635, "path": "khan/math/probability/regression/regression-correlation/proof-part-1-minimizing-squared-error-to-regression-line/", "keywords": "Proof, (Part, 1), Minimizing, Squared, Error, to, Regression, Line, CC_8_SP_2, CC_8_SP_3", "id": "mIx2Oj5y9Q8", "title": "Proof (part 1) minimizing squared error to regression line", "description": "Proof (Part 1) Minimizing Squared Error to Regression Line", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mIx2Oj5y9Q8.mp4/mIx2Oj5y9Q8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mIx2Oj5y9Q8.mp4/mIx2Oj5y9Q8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mIx2Oj5y9Q8.m3u8/mIx2Oj5y9Q8.m3u8"}, "slug": "proof-part-1-minimizing-squared-error-to-regression-line", "video_id": "mIx2Oj5y9Q8", "youtube_id": "mIx2Oj5y9Q8", "readable_id": "proof-part-1-minimizing-squared-error-to-regression-line"}, "YwnfVj5qeo4": {"duration": 197, "path": "khan/humanities/art-1010/early-abstraction/cubism/moma-picasso-guitars-1912-1914/", "keywords": "", "id": "YwnfVj5qeo4", "title": "Conservation | Picasso's Guitars", "description": "Photography helps MoMA conservators determine how to treat Picasso's 1913 Cubist sculpture, Still-Life with Guitar. To learn about how art changes over time, enroll in one of MoMA's courses online.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YwnfVj5qeo4.mp4/YwnfVj5qeo4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YwnfVj5qeo4.mp4/YwnfVj5qeo4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YwnfVj5qeo4.m3u8/YwnfVj5qeo4.m3u8"}, "slug": "moma-picasso-guitars-1912-1914", "video_id": "YwnfVj5qeo4", "youtube_id": "YwnfVj5qeo4", "readable_id": "moma-picasso-guitars-1912-1914"}, "YD82l_bUhLc": {"duration": 437, "path": "khan/partner-content/wi-phi/metaphys-epistemology/conventional-implicature/", "keywords": "", "id": "YD82l_bUhLc", "title": "Language: Conventional Implicature", "description": "William introduces us to different aspects of meaning, as studied by linguistics and philosophers. He tells us about the difference between the literal meaning of a sentence someone says, and what they intend to convey by using that sentence at that particular time.\n\nSpeaker: Dr. William Salmon, Assistant Professor of Linguistics,\u00a0University of Minnesota Duluth", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YD82l_bUhLc.mp4/YD82l_bUhLc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YD82l_bUhLc.mp4/YD82l_bUhLc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YD82l_bUhLc.m3u8/YD82l_bUhLc.m3u8"}, "slug": "conventional-implicature", "video_id": "YD82l_bUhLc", "youtube_id": "YD82l_bUhLc", "readable_id": "conventional-implicature"}, "kvGsIo1TmsM": {"duration": 477, "path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/what-is-a-function/", "keywords": "", "id": "kvGsIo1TmsM", "title": "What is a function?", "description": "Functions assign a single unique output for each of their inputs. In this video, Sal gives many examples of various kinds of functions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kvGsIo1TmsM.mp4/kvGsIo1TmsM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kvGsIo1TmsM.mp4/kvGsIo1TmsM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kvGsIo1TmsM.m3u8/kvGsIo1TmsM.m3u8"}, "slug": "what-is-a-function", "video_id": "kvGsIo1TmsM", "youtube_id": "kvGsIo1TmsM", "readable_id": "what-is-a-function"}, "cKAF1v5hJoE": {"duration": 421, "path": "khan/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/why-heat-increases-entropy/", "keywords": "education,online learning,learning,lessons", "id": "cKAF1v5hJoE", "title": "Why heat increases entropy", "description": "Why heat increases entropy\u2014even though some of it can do work!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cKAF1v5hJoE.mp4/cKAF1v5hJoE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cKAF1v5hJoE.mp4/cKAF1v5hJoE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cKAF1v5hJoE.m3u8/cKAF1v5hJoE.m3u8"}, "slug": "why-heat-increases-entropy", "video_id": "cKAF1v5hJoE", "youtube_id": "cKAF1v5hJoE", "readable_id": "why-heat-increases-entropy"}, "j-enxYaQMdA": {"duration": 372, "path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/zeroth-law-of-thermodynamics/", "keywords": "", "id": "j-enxYaQMdA", "title": "Zeroth law of thermodynamics", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j-enxYaQMdA.mp4/j-enxYaQMdA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j-enxYaQMdA.mp4/j-enxYaQMdA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j-enxYaQMdA.m3u8/j-enxYaQMdA.m3u8"}, "slug": "zeroth-law-of-thermodynamics", "video_id": "j-enxYaQMdA", "youtube_id": "j-enxYaQMdA", "readable_id": "zeroth-law-of-thermodynamics"}, "knQtiFUyCi8": {"duration": 375, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/tchaikovsky-4th-analysis/pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-2/", "keywords": "", "id": "knQtiFUyCi8", "title": "Pyotr Ilyich Tchaikovsky: Symphony No.4, analysis by Gerard Schwarz (part 2)", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/knQtiFUyCi8.mp4/knQtiFUyCi8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/knQtiFUyCi8.mp4/knQtiFUyCi8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/knQtiFUyCi8.m3u8/knQtiFUyCi8.m3u8"}, "slug": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-2", "video_id": "knQtiFUyCi8", "youtube_id": "knQtiFUyCi8", "readable_id": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-2"}, "axP8LfkPvF0": {"duration": 504, "path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-of-a-dvd-player-4-of-5/", "keywords": "tolerance, fit, accuracy, fit, precision, electro-mechanical, rare earth magnets, copper coil, tracking, laser diode, mirror, reflector, laser sensor, light sensor, binary, reflection, bumps, pits, aluminum, sputtering, ribbon cable,", "id": "axP8LfkPvF0", "title": "What is inside a DVD player? (4 of 5)", "description": "In this video we explore the DVD ROM components inside a DVD player.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/axP8LfkPvF0.mp4/axP8LfkPvF0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/axP8LfkPvF0.mp4/axP8LfkPvF0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/axP8LfkPvF0.m3u8/axP8LfkPvF0.m3u8"}, "slug": "what-is-inside-of-a-dvd-player-4-of-5", "video_id": "axP8LfkPvF0", "youtube_id": "axP8LfkPvF0", "readable_id": "what-is-inside-of-a-dvd-player-4-of-5"}, "VIdvlSFDl2c": {"duration": 115, "path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-9/", "keywords": "", "id": "VIdvlSFDl2c", "title": "Attach Spout's antennae", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VIdvlSFDl2c.mp4/VIdvlSFDl2c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VIdvlSFDl2c.mp4/VIdvlSFDl2c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VIdvlSFDl2c.m3u8/VIdvlSFDl2c.m3u8"}, "slug": "solderless-spout-9", "video_id": "VIdvlSFDl2c", "youtube_id": "VIdvlSFDl2c", "readable_id": "solderless-spout-9"}, "FJ7AMaR9miI": {"duration": 359, "path": "khan/math/differential-calculus/derivative_applications/normal-tangent-line-eq/tangent-line-intercept/", "keywords": "", "id": "FJ7AMaR9miI", "title": "y-intercept of tangent line example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FJ7AMaR9miI.mp4/FJ7AMaR9miI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FJ7AMaR9miI.mp4/FJ7AMaR9miI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FJ7AMaR9miI.m3u8/FJ7AMaR9miI.m3u8"}, "slug": "tangent-line-intercept", "video_id": "FJ7AMaR9miI", "youtube_id": "FJ7AMaR9miI", "readable_id": "tangent-line-intercept"}, "KYoB2mjNdr0": {"duration": 1008, "path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/french-revolution-part-4-the-rise-of-napoleon-bonaparte/", "keywords": "french, revolution, napoleon, bonaparte", "id": "KYoB2mjNdr0", "title": "French Revolution (part 4) - The Rise of Napoleon Bonaparte", "description": "The rise of Napoleon Bonaparte", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KYoB2mjNdr0.mp4/KYoB2mjNdr0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KYoB2mjNdr0.mp4/KYoB2mjNdr0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KYoB2mjNdr0.m3u8/KYoB2mjNdr0.m3u8"}, "slug": "french-revolution-part-4-the-rise-of-napoleon-bonaparte", "video_id": "KYoB2mjNdr0", "youtube_id": "KYoB2mjNdr0", "readable_id": "french-revolution-part-4-the-rise-of-napoleon-bonaparte"}, "p7ycTWq6BFk": {"duration": 691, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/a-third-example-of-graphing-a-rational-function/", "keywords": "Third, Example, of, Graphing, Rational, Function, CC_39336_F-IF_7_d", "id": "p7ycTWq6BFk", "title": "How to graph a rational function (example)", "description": "Sal graphs y=(x)/(x^2-x-6).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p7ycTWq6BFk.mp4/p7ycTWq6BFk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p7ycTWq6BFk.mp4/p7ycTWq6BFk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p7ycTWq6BFk.m3u8/p7ycTWq6BFk.m3u8"}, "slug": "a-third-example-of-graphing-a-rational-function", "video_id": "p7ycTWq6BFk", "youtube_id": "p7ycTWq6BFk", "readable_id": "a-third-example-of-graphing-a-rational-function"}, "juMTnPcfd3A": {"duration": 92, "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments/sscc-blended-modelchoices/", "keywords": "", "id": "juMTnPcfd3A", "title": "How the choices you make in your blended model impact the kind of school you run", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/juMTnPcfd3A.mp4/juMTnPcfd3A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/juMTnPcfd3A.mp4/juMTnPcfd3A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/juMTnPcfd3A.m3u8/juMTnPcfd3A.m3u8"}, "slug": "sscc-blended-modelchoices", "video_id": "juMTnPcfd3A", "youtube_id": "juMTnPcfd3A", "readable_id": "sscc-blended-modelchoices"}, "9-PYxR59H_g": {"duration": 244, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p9-easier/", "keywords": "", "id": "9-PYxR59H_g", "title": "Operations with rational expressions \u2014 Basic example", "description": "Watch Sal work through a basic Operations with rational expressions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9-PYxR59H_g.mp4/9-PYxR59H_g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9-PYxR59H_g.mp4/9-PYxR59H_g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9-PYxR59H_g.m3u8/9-PYxR59H_g.m3u8"}, "slug": "sat-math-p9-easier", "video_id": "9-PYxR59H_g", "youtube_id": "9-PYxR59H_g", "readable_id": "sat-math-p9-easier"}, "1j5WnqwMdCk": {"duration": 1075, "path": "khan/math/linear-algebra/alternate_bases/change_of_basis/linear-algebra-change-of-basis-matrix/", "keywords": "change, of, basis, matrix, coordinate, system", "id": "1j5WnqwMdCk", "title": "Change of basis matrix", "description": "Using a change of basis matrix to get us from one coordinate system to another.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1j5WnqwMdCk.mp4/1j5WnqwMdCk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1j5WnqwMdCk.mp4/1j5WnqwMdCk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1j5WnqwMdCk.m3u8/1j5WnqwMdCk.m3u8"}, "slug": "linear-algebra-change-of-basis-matrix", "video_id": "1j5WnqwMdCk", "youtube_id": "1j5WnqwMdCk", "readable_id": "linear-algebra-change-of-basis-matrix"}, "AiW7syKXfJM": {"duration": 154, "path": "khan/math/algebra/algebra-functions/determining-the-domain-of-a-function/domain-of-a-modeling-function-example-2/", "keywords": "", "id": "AiW7syKXfJM", "title": "How to determine the domain of a modeling function (example with a function that is defined over the positive integers)", "description": "Sal determines the domain of a function that models the price of candy bars.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AiW7syKXfJM.mp4/AiW7syKXfJM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AiW7syKXfJM.mp4/AiW7syKXfJM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AiW7syKXfJM.m3u8/AiW7syKXfJM.m3u8"}, "slug": "domain-of-a-modeling-function-example-2", "video_id": "AiW7syKXfJM", "youtube_id": "AiW7syKXfJM", "readable_id": "domain-of-a-modeling-function-example-2"}, "8dMLK2Wueaw": {"duration": 361, "path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/visualizing-taylor-series-approximations/", "keywords": "maclaurin, taylor, series, expansion, marquee, CC_39336_F-IF_7_e", "id": "8dMLK2Wueaw", "title": "Visualizing Taylor series approximations", "description": "Using Wolfram Alpha to approximate sin(x)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8dMLK2Wueaw.mp4/8dMLK2Wueaw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8dMLK2Wueaw.mp4/8dMLK2Wueaw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8dMLK2Wueaw.m3u8/8dMLK2Wueaw.m3u8"}, "slug": "visualizing-taylor-series-approximations", "video_id": "8dMLK2Wueaw", "youtube_id": "8dMLK2Wueaw", "readable_id": "visualizing-taylor-series-approximations"}, "bwOE1MEginA": {"duration": 689, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/three-types-of-muscle/", "keywords": "", "id": "bwOE1MEginA", "title": "Three types of muscle", "description": "Understanding the structure of a muscle cell.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bwOE1MEginA.mp4/bwOE1MEginA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bwOE1MEginA.mp4/bwOE1MEginA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bwOE1MEginA.m3u8/bwOE1MEginA.m3u8"}, "slug": "three-types-of-muscle", "video_id": "bwOE1MEginA", "youtube_id": "bwOE1MEginA", "readable_id": "three-types-of-muscle"}, "e0lBUViss8E": {"duration": 219, "path": "khan/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem/constructing-a-polynomial-that-has-a-certain-factor/", "keywords": "", "id": "e0lBUViss8E", "title": "How to determine the coefficients of a polynomial so it has a certain factor using the Polynomial Remainder Theorem (example)", "description": "Sal determines the value of coefficient c in p(x)=x^3+2x^2+cx+10, in order for (x-5) to be a factor of p. The key is using the PRT (Polynomial Remainder Theorem)!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e0lBUViss8E.mp4/e0lBUViss8E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e0lBUViss8E.mp4/e0lBUViss8E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e0lBUViss8E.m3u8/e0lBUViss8E.m3u8"}, "slug": "constructing-a-polynomial-that-has-a-certain-factor", "video_id": "e0lBUViss8E", "youtube_id": "e0lBUViss8E", "readable_id": "constructing-a-polynomial-that-has-a-certain-factor"}, "14-NdQwKz9w": {"duration": 367, "path": "khan/math/recreational-math/vi-hart/spirals-fibonacci/doodling-in-math-spirals-fibonacci-and-being-a-plant-part-3-of-3/", "keywords": "fibonacci, plants, spirals, mathematics, algorithms, math, vi hart, phyllotaxis, golden ratio, lucas numbers", "id": "14-NdQwKz9w", "title": "Doodling in math: Spirals, Fibonacci, and being a plant [3 of 3]", "description": "Part 1: http://youtu.be/ahXIMUkSXX0 Part 2: http://youtu.be/lOIP_Z_-0Hs How to find the Lucas Angle: http://youtu.be/RRNQAaTVa_A References: Only good article I could find on the subject: http://www.sciencenews.org/view/generic/id/8479/title/Math_Trek__The_Mathematical_Lives_of_Plants Book of Numbers: http://books.google.com/books?id=0--3rcO7dMYC&pg=PA113&lpg=PA113&dq=conway+phyllotaxis&source=bl&ots=-bTLzWkMtB&sig=XnbL9nRYQoWOCbvWdZPAlVa3Co0&hl=en&sa=X&ei=2afqTui9L6OUiAKapaC7BA&ved=0CCkQ6AEwAQ#v=onepage&q&f=false Douady and Couder paper with the magnetized droplets: http://www.math.ntnu.no/~jarlet/Douady96.pdf Pretty sane page on phyllotaxis: http://www.math.smith.edu/phyllo/", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/14-NdQwKz9w.mp4/14-NdQwKz9w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/14-NdQwKz9w.mp4/14-NdQwKz9w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/14-NdQwKz9w.m3u8/14-NdQwKz9w.m3u8"}, "slug": "doodling-in-math-spirals-fibonacci-and-being-a-plant-part-3-of-3", "video_id": "14-NdQwKz9w", "youtube_id": "14-NdQwKz9w", "readable_id": "doodling-in-math-spirals-fibonacci-and-being-a-plant-part-3-of-3"}, "-lIc5z3XjXQ": {"duration": 485, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/paramagnetism-and-diamagnetism/", "keywords": "", "id": "-lIc5z3XjXQ", "title": "Paramagnetism and diamagnetism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-lIc5z3XjXQ.mp4/-lIc5z3XjXQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-lIc5z3XjXQ.mp4/-lIc5z3XjXQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-lIc5z3XjXQ.m3u8/-lIc5z3XjXQ.m3u8"}, "slug": "paramagnetism-and-diamagnetism", "video_id": "-lIc5z3XjXQ", "youtube_id": "-lIc5z3XjXQ", "readable_id": "paramagnetism-and-diamagnetism"}, "PJHbPlC2Qfc": {"duration": 181, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/precision-advanced/", "keywords": "education,online learning,learning,lessons", "id": "PJHbPlC2Qfc", "title": "Writing: Precision \u2014 Harder example", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing precision.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PJHbPlC2Qfc.mp4/PJHbPlC2Qfc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PJHbPlC2Qfc.mp4/PJHbPlC2Qfc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PJHbPlC2Qfc.m3u8/PJHbPlC2Qfc.m3u8"}, "slug": "precision-advanced", "video_id": "PJHbPlC2Qfc", "youtube_id": "PJHbPlC2Qfc", "readable_id": "precision-advanced"}, "HqiBo62O8bk": {"duration": 574, "path": "khan/test-prep/gmat/problem-solving/gmat-math-7/", "keywords": "GMAT, problem, solving, math", "id": "HqiBo62O8bk", "title": "GMAT: Math 7", "description": "36-41, pgs. 156-157", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HqiBo62O8bk.mp4/HqiBo62O8bk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HqiBo62O8bk.mp4/HqiBo62O8bk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HqiBo62O8bk.m3u8/HqiBo62O8bk.m3u8"}, "slug": "gmat-math-7", "video_id": "HqiBo62O8bk", "youtube_id": "HqiBo62O8bk", "readable_id": "gmat-math-7"}, "S3X-NkvE49o": {"duration": 538, "path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/types-of-animal-communication/", "keywords": "", "id": "S3X-NkvE49o", "title": "Types of animal communication", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S3X-NkvE49o.mp4/S3X-NkvE49o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S3X-NkvE49o.mp4/S3X-NkvE49o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S3X-NkvE49o.m3u8/S3X-NkvE49o.m3u8"}, "slug": "types-of-animal-communication", "video_id": "S3X-NkvE49o", "youtube_id": "S3X-NkvE49o", "readable_id": "types-of-animal-communication"}, "aqsIWLqlDhE": {"duration": 377, "path": "khan/math/pre-algebra/fractions-pre-alg/number-sets-pre-alg/number-sets-1/", "keywords": "U12_L1_T1_we1, Number, Sets, CC_6_NS_6, CC_6_NS_6_c, CC_8_NS_1", "id": "aqsIWLqlDhE", "title": "Number sets 1", "description": "Number Sets 1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aqsIWLqlDhE.mp4/aqsIWLqlDhE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aqsIWLqlDhE.mp4/aqsIWLqlDhE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aqsIWLqlDhE.m3u8/aqsIWLqlDhE.m3u8"}, "slug": "number-sets-1", "video_id": "aqsIWLqlDhE", "youtube_id": "aqsIWLqlDhE", "readable_id": "number-sets-1"}, "QiZNpzeTVKA": {"duration": 192, "path": "khan/partner-content/wi-phi/critical-thinking/justification-and-explanation/", "keywords": "", "id": "QiZNpzeTVKA", "title": "Fundamentals: Justification and Explanation", "description": "The concept of justification is fundamental to good, careful thinking. But what does it mean for a belief or action to be justified? In this video, Kelley sheds some light on how to assess whether a belief and action is justified. She also clarifies the notion of justification by distinguishing it from explanation and explaining its relationship to the practice of giving reasons.\n\nSpeaker: Kelley Schiffman", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QiZNpzeTVKA.mp4/QiZNpzeTVKA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QiZNpzeTVKA.mp4/QiZNpzeTVKA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QiZNpzeTVKA.m3u8/QiZNpzeTVKA.m3u8"}, "slug": "justification-and-explanation", "video_id": "QiZNpzeTVKA", "youtube_id": "QiZNpzeTVKA", "readable_id": "justification-and-explanation"}, "iF-f2-KSw6E": {"duration": 395, "path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/multiple-substituents/", "keywords": "", "id": "iF-f2-KSw6E", "title": "Multiple substituents", "description": "The directing effects of substituents on a benzene ring", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iF-f2-KSw6E.mp4/iF-f2-KSw6E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iF-f2-KSw6E.mp4/iF-f2-KSw6E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iF-f2-KSw6E.m3u8/iF-f2-KSw6E.m3u8"}, "slug": "multiple-substituents", "video_id": "iF-f2-KSw6E", "youtube_id": "iF-f2-KSw6E", "readable_id": "multiple-substituents"}, "Q48ddBmCjQA": {"duration": 397, "path": "khan/humanities/art-islam/islamic-art-late-period/sinan-sleymaniye-mosque/", "keywords": "", "id": "Q48ddBmCjQA", "title": "Sinan, S\u00fcleymaniye Mosque", "description": "Sinan, S\u00fcleymaniye Mosque, Istanbul, completed 1558\nSpeakers: Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q48ddBmCjQA.mp4/Q48ddBmCjQA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q48ddBmCjQA.mp4/Q48ddBmCjQA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q48ddBmCjQA.m3u8/Q48ddBmCjQA.m3u8"}, "slug": "sinan-sleymaniye-mosque", "video_id": "Q48ddBmCjQA", "youtube_id": "Q48ddBmCjQA", "readable_id": "sinan-sleymaniye-mosque"}, "-rxUip6Ulnw": {"duration": 126, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/constructing-numeric-expressions/evaluating-an-expression-with-and-without-parentheses/", "keywords": "", "id": "-rxUip6Ulnw", "title": "Evaluating expressions with and without parentheses", "description": "So maybe parentheses don't seem like a big deal? Check out this problem and the difference in the answer when you work it without the parentheses. Wow.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-rxUip6Ulnw.mp4/-rxUip6Ulnw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-rxUip6Ulnw.mp4/-rxUip6Ulnw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-rxUip6Ulnw.m3u8/-rxUip6Ulnw.m3u8"}, "slug": "evaluating-an-expression-with-and-without-parentheses", "video_id": "-rxUip6Ulnw", "youtube_id": "-rxUip6Ulnw", "readable_id": "evaluating-an-expression-with-and-without-parentheses"}, "0lX34MHTs8E": {"duration": 550, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/clarinet-interview-and-demonstration-with-principal-jon-manasse/", "keywords": "", "id": "0lX34MHTs8E", "title": "Clarinet: Interview and demonstration with principal Jon Manasse", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0lX34MHTs8E.mp4/0lX34MHTs8E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0lX34MHTs8E.mp4/0lX34MHTs8E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0lX34MHTs8E.m3u8/0lX34MHTs8E.m3u8"}, "slug": "clarinet-interview-and-demonstration-with-principal-jon-manasse", "video_id": "0lX34MHTs8E", "youtube_id": "0lX34MHTs8E", "readable_id": "clarinet-interview-and-demonstration-with-principal-jon-manasse"}, "_uTAdf_AsfQ": {"duration": 1513, "path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/null-space-and-column-space-basis/", "keywords": "null, space, column, matrix, basis", "id": "_uTAdf_AsfQ", "title": "Null space and column space basis", "description": "Figuring out the null space and a basis of a column space for a matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_uTAdf_AsfQ.mp4/_uTAdf_AsfQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_uTAdf_AsfQ.mp4/_uTAdf_AsfQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_uTAdf_AsfQ.m3u8/_uTAdf_AsfQ.m3u8"}, "slug": "null-space-and-column-space-basis", "video_id": "_uTAdf_AsfQ", "youtube_id": "_uTAdf_AsfQ", "readable_id": "null-space-and-column-space-basis"}, "EQhBl75ZiKQ": {"duration": 58, "path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/ss-size-campus-major-selectivity-college-search/", "keywords": "", "id": "EQhBl75ZiKQ", "title": "Student story: Prioritizing size, campus, major, and selectivity in the college search", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EQhBl75ZiKQ.mp4/EQhBl75ZiKQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EQhBl75ZiKQ.mp4/EQhBl75ZiKQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EQhBl75ZiKQ.m3u8/EQhBl75ZiKQ.m3u8"}, "slug": "ss-size-campus-major-selectivity-college-search", "video_id": "EQhBl75ZiKQ", "youtube_id": "EQhBl75ZiKQ", "readable_id": "ss-size-campus-major-selectivity-college-search"}, "dKFE0uJayM8": {"duration": 673, "path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/retro-aldol-and-retrosynthesis/", "keywords": "", "id": "dKFE0uJayM8", "title": "Retro-aldol and retrosynthesis", "description": "How to think about the aldol condensation using retrosynthesis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dKFE0uJayM8.mp4/dKFE0uJayM8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dKFE0uJayM8.mp4/dKFE0uJayM8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dKFE0uJayM8.m3u8/dKFE0uJayM8.m3u8"}, "slug": "retro-aldol-and-retrosynthesis", "video_id": "dKFE0uJayM8", "youtube_id": "dKFE0uJayM8", "readable_id": "retro-aldol-and-retrosynthesis"}, "U6U4HhR3Fqc": {"duration": 266, "path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/orientation-and-stokes/", "keywords": "stokes, theorem", "id": "U6U4HhR3Fqc", "title": "Orientation and stokes", "description": "Determining the proper orientation of a boundary given the orientation of the normal vector", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U6U4HhR3Fqc.mp4/U6U4HhR3Fqc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U6U4HhR3Fqc.mp4/U6U4HhR3Fqc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U6U4HhR3Fqc.m3u8/U6U4HhR3Fqc.m3u8"}, "slug": "orientation-and-stokes", "video_id": "U6U4HhR3Fqc", "youtube_id": "U6U4HhR3Fqc", "readable_id": "orientation-and-stokes"}, "hpBBuaiIkrg": {"duration": 143, "path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/recognizing-features-of-functions-example-1/", "keywords": "", "id": "hpBBuaiIkrg", "title": "Recognizing features of functions (example 1)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hpBBuaiIkrg.mp4/hpBBuaiIkrg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hpBBuaiIkrg.mp4/hpBBuaiIkrg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hpBBuaiIkrg.m3u8/hpBBuaiIkrg.m3u8"}, "slug": "recognizing-features-of-functions-example-1", "video_id": "hpBBuaiIkrg", "youtube_id": "hpBBuaiIkrg", "readable_id": "recognizing-features-of-functions-example-1"}, "UV8kgqk_DAY": {"duration": 822, "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/ira-401ks/traditional-iras/", "keywords": "IRA, retirement, investment", "id": "UV8kgqk_DAY", "title": "Traditional IRAs", "description": "Introduction to traditional IRA's (Individual Retirement Accounts)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UV8kgqk_DAY.mp4/UV8kgqk_DAY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UV8kgqk_DAY.mp4/UV8kgqk_DAY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UV8kgqk_DAY.m3u8/UV8kgqk_DAY.m3u8"}, "slug": "traditional-iras", "video_id": "UV8kgqk_DAY", "youtube_id": "UV8kgqk_DAY", "readable_id": "traditional-iras"}, "g_agha5-Lhc": {"duration": 126, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-6/", "keywords": "", "id": "g_agha5-Lhc", "title": "6 Equivalent expressions", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g_agha5-Lhc.mp4/g_agha5-Lhc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g_agha5-Lhc.mp4/g_agha5-Lhc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g_agha5-Lhc.m3u8/g_agha5-Lhc.m3u8"}, "slug": "2013-sat-practice-6-6", "video_id": "g_agha5-Lhc", "youtube_id": "g_agha5-Lhc", "readable_id": "2013-sat-practice-6-6"}, "0MKsFD03Ukc": {"duration": 382, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/electron-configurations-for-the-first-period/", "keywords": "", "id": "0MKsFD03Ukc", "title": "Electron configurations for the first period", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0MKsFD03Ukc.mp4/0MKsFD03Ukc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0MKsFD03Ukc.mp4/0MKsFD03Ukc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0MKsFD03Ukc.m3u8/0MKsFD03Ukc.m3u8"}, "slug": "electron-configurations-for-the-first-period", "video_id": "0MKsFD03Ukc", "youtube_id": "0MKsFD03Ukc", "readable_id": "electron-configurations-for-the-first-period"}, "pGhBfkBqok0": {"duration": 567, "path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/linear-algebra-dim-v-dim-orthogonal-complement-of-v-n/", "keywords": "orthogonal, complement, dimension, dim", "id": "pGhBfkBqok0", "title": "dim(v) + dim(orthogonal complement of v) = n", "description": "Showing that if V is a subspace of Rn, then dim(V) + dim(V's orthogonal complement) = n", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pGhBfkBqok0.mp4/pGhBfkBqok0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pGhBfkBqok0.mp4/pGhBfkBqok0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pGhBfkBqok0.m3u8/pGhBfkBqok0.m3u8"}, "slug": "linear-algebra-dim-v-dim-orthogonal-complement-of-v-n", "video_id": "pGhBfkBqok0", "youtube_id": "pGhBfkBqok0", "readable_id": "linear-algebra-dim-v-dim-orthogonal-complement-of-v-n"}, "uFZvWYPfOmw": {"duration": 327, "path": "khan/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials/identifying-graph-based-on-roots/", "keywords": "", "id": "uFZvWYPfOmw", "title": "Identifying graph based on roots", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uFZvWYPfOmw.mp4/uFZvWYPfOmw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uFZvWYPfOmw.mp4/uFZvWYPfOmw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uFZvWYPfOmw.m3u8/uFZvWYPfOmw.m3u8"}, "slug": "identifying-graph-based-on-roots", "video_id": "uFZvWYPfOmw", "youtube_id": "uFZvWYPfOmw", "readable_id": "identifying-graph-based-on-roots"}, "xFHh89QTRSE": {"duration": 685, "path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-41/", "keywords": "crash course", "id": "xFHh89QTRSE", "title": "Globalization I - The upside", "description": "In which John Green teaches you about globalization, a subject so epic, so, um, global, it requires two videos. In this video, John follows the surprisingly complex path of t-shirt as it criss-crosses the world before coming to rest on your doorstep, and eventually in your dresser. (Unless you're one of those people who never puts their laundry away and lives out of a laundry basket. If that's the case, shame on you.) Anyway, the story of the t-shirt and its manufacture in far-flung places like China, Guatemala, and India is a microcosm of what's going on in the global economy. Globalization is a bit of a mixed bag, and there have definitely been winners and losers along the way. In this episode John will talk about some of the benefits that have come along with it. Next week, he'll get into some of the less-positive side effects of globalization.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xFHh89QTRSE.mp4/xFHh89QTRSE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xFHh89QTRSE.mp4/xFHh89QTRSE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xFHh89QTRSE.m3u8/xFHh89QTRSE.m3u8"}, "slug": "crash-course-world-history-41", "video_id": "xFHh89QTRSE", "youtube_id": "xFHh89QTRSE", "readable_id": "crash-course-world-history-41"}, "DWKWjpVsGng": {"duration": 273, "path": "khan/test-prep/mcat/behavior/human-development/physical-development-in-adolescence/", "keywords": "Health (Industry)", "id": "DWKWjpVsGng", "title": "Physical development in adolescence", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DWKWjpVsGng.mp4/DWKWjpVsGng.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DWKWjpVsGng.mp4/DWKWjpVsGng.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DWKWjpVsGng.m3u8/DWKWjpVsGng.m3u8"}, "slug": "physical-development-in-adolescence", "video_id": "DWKWjpVsGng", "youtube_id": "DWKWjpVsGng", "readable_id": "physical-development-in-adolescence"}, "LwF9nTEB84k": {"duration": 580, "path": "khan/humanities/global-culture/global-art-architecture/gabriel-orozco/", "keywords": "Tate", "id": "LwF9nTEB84k", "title": "Gabriel Orozco", "description": "This video brought to you by Tate.org.uk\n\nCreative, playful and inventive, Gabriel Orozco creates art in the streets, his apartment or wherever he is inspired. Born in Mexico but working across the globe, Orozco is renowned for his endless experimentation with found objects, which he subtly alters. Join him as he shares his work, throws a boomerang, and marvels at what art can do.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LwF9nTEB84k.mp4/LwF9nTEB84k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LwF9nTEB84k.mp4/LwF9nTEB84k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LwF9nTEB84k.m3u8/LwF9nTEB84k.m3u8"}, "slug": "gabriel-orozco", "video_id": "LwF9nTEB84k", "youtube_id": "LwF9nTEB84k", "readable_id": "gabriel-orozco"}, "y5lhKvKvWPg": {"duration": 219, "path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/gauguin-vision-after-the-sermon/", "keywords": "", "id": "y5lhKvKvWPg", "title": "Paul Gauguin, Vision after the Sermon, or Jacob Wrestling with the Angel", "description": "Paul Gauguin, Vision after the Sermon, or Jacob Wrestling with the Angel, 1888, oil on canvas, 2' 4 3/4\" x 3' 1/2\" (National Gallery of Scotland, Edinburgh)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y5lhKvKvWPg.mp4/y5lhKvKvWPg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y5lhKvKvWPg.mp4/y5lhKvKvWPg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y5lhKvKvWPg.m3u8/y5lhKvKvWPg.m3u8"}, "slug": "gauguin-vision-after-the-sermon", "video_id": "y5lhKvKvWPg", "youtube_id": "y5lhKvKvWPg", "readable_id": "gauguin-vision-after-the-sermon"}, "1POB_czE16k": {"duration": 577, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders/what-is-essential-thrombocythemia/", "keywords": "", "id": "1POB_czE16k", "title": "What is essential thrombocythemia?", "description": "Learn what is essential thrombocythemia as well as how to identify its signs and symptoms, diagnose it, and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1POB_czE16k.mp4/1POB_czE16k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1POB_czE16k.mp4/1POB_czE16k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1POB_czE16k.m3u8/1POB_czE16k.m3u8"}, "slug": "what-is-essential-thrombocythemia", "video_id": "1POB_czE16k", "youtube_id": "1POB_czE16k", "readable_id": "what-is-essential-thrombocythemia"}, "AurTtzpAr4c": {"duration": 542, "path": "khan/computing/computer-science/informationtheory/info-theory/history-of-static-electricity-language-of-coins-6-12/", "keywords": "static electricity", "id": "AurTtzpAr4c", "title": "Electrostatic telegraphs (case study)", "description": "Long before the internet people thought about sending information along wires using static electricity.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AurTtzpAr4c.mp4/AurTtzpAr4c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AurTtzpAr4c.mp4/AurTtzpAr4c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AurTtzpAr4c.m3u8/AurTtzpAr4c.m3u8"}, "slug": "history-of-static-electricity-language-of-coins-6-12", "video_id": "AurTtzpAr4c", "youtube_id": "AurTtzpAr4c", "readable_id": "history-of-static-electricity-language-of-coins-6-12"}, "iQk1M3-WvZM": {"duration": 288, "path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/matching-expressions-to-define-intervals-of-functions-example/", "keywords": "", "id": "iQk1M3-WvZM", "title": "Matching expressions to define intervals of functions example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iQk1M3-WvZM.mp4/iQk1M3-WvZM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iQk1M3-WvZM.mp4/iQk1M3-WvZM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iQk1M3-WvZM.m3u8/iQk1M3-WvZM.m3u8"}, "slug": "matching-expressions-to-define-intervals-of-functions-example", "video_id": "iQk1M3-WvZM", "youtube_id": "iQk1M3-WvZM", "readable_id": "matching-expressions-to-define-intervals-of-functions-example"}, "faqhDcrWfHQ": {"duration": 964, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/diagnosing-active-tb/", "keywords": "", "id": "faqhDcrWfHQ", "title": "Diagnosing active TB", "description": "Find out how we can use clinical clues to help figure out if someone has active TB infection.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/faqhDcrWfHQ.mp4/faqhDcrWfHQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/faqhDcrWfHQ.mp4/faqhDcrWfHQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/faqhDcrWfHQ.m3u8/faqhDcrWfHQ.m3u8"}, "slug": "diagnosing-active-tb", "video_id": "faqhDcrWfHQ", "youtube_id": "faqhDcrWfHQ", "readable_id": "diagnosing-active-tb"}, "5MoIg5lWLXA": {"duration": 397, "path": "khan/test-prep/mcat/cells/cellular-development/cellular-communication/", "keywords": "", "id": "5MoIg5lWLXA", "title": "Cellular communication", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5MoIg5lWLXA.mp4/5MoIg5lWLXA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5MoIg5lWLXA.mp4/5MoIg5lWLXA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5MoIg5lWLXA.m3u8/5MoIg5lWLXA.m3u8"}, "slug": "cellular-communication", "video_id": "5MoIg5lWLXA", "youtube_id": "5MoIg5lWLXA", "readable_id": "cellular-communication"}, "nONjtiCnbI0": {"duration": 165, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/philip-rosedale/kauffman-philip-rosedale1/", "keywords": "", "id": "nONjtiCnbI0", "title": "Philip Rosedale - Founder of Coffee and Power", "description": "Philip Rosedale, Founder of Coffee and Power, discusses his recent venture and how a student\u2019s education today can lead to a career tomorrow.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nONjtiCnbI0.mp4/nONjtiCnbI0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nONjtiCnbI0.mp4/nONjtiCnbI0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nONjtiCnbI0.m3u8/nONjtiCnbI0.m3u8"}, "slug": "kauffman-philip-rosedale1", "video_id": "nONjtiCnbI0", "youtube_id": "nONjtiCnbI0", "readable_id": "kauffman-philip-rosedale1"}, "6zV3JEjLoyE": {"duration": 453, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial/parsec-definition/", "keywords": "Parsec, Definition, parallax, arsecond", "id": "6zV3JEjLoyE", "title": "Parsec definition", "description": "Parsec Definition", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6zV3JEjLoyE.mp4/6zV3JEjLoyE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6zV3JEjLoyE.mp4/6zV3JEjLoyE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6zV3JEjLoyE.m3u8/6zV3JEjLoyE.m3u8"}, "slug": "parsec-definition", "video_id": "6zV3JEjLoyE", "youtube_id": "6zV3JEjLoyE", "readable_id": "parsec-definition"}, "h-qUlzA70nY": {"duration": 231, "path": "khan/humanities/ancient-art-civilizations/roman/roman-republic/capitoline-brutus/", "keywords": "brutus, ancient rome, ", "id": "h-qUlzA70nY", "title": "Capitoline Brutus", "description": "4th-3rd century B.C.E.\u00a0bronze, 69 cm (Capitoline Museums, Rome)\n\nSpeakers; Dr. Steven Zucker and Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/h-qUlzA70nY.mp4/h-qUlzA70nY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/h-qUlzA70nY.mp4/h-qUlzA70nY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/h-qUlzA70nY.m3u8/h-qUlzA70nY.m3u8"}, "slug": "capitoline-brutus", "video_id": "h-qUlzA70nY", "youtube_id": "h-qUlzA70nY", "readable_id": "capitoline-brutus"}, "sI789G6FBb4": {"duration": 320, "path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/sin-angle-addition/", "keywords": "", "id": "sI789G6FBb4", "title": "Applying angle addition formula for sin", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sI789G6FBb4.mp4/sI789G6FBb4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sI789G6FBb4.mp4/sI789G6FBb4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sI789G6FBb4.m3u8/sI789G6FBb4.m3u8"}, "slug": "sin-angle-addition", "video_id": "sI789G6FBb4", "youtube_id": "sI789G6FBb4", "readable_id": "sin-angle-addition"}, "oMWTMj78cwc": {"duration": 592, "path": "khan/math/linear-algebra/matrix_transformations/composition_of_transformations/distributive-property-of-matrix-products/", "keywords": "matrix, product, distributive", "id": "oMWTMj78cwc", "title": "Distributive property of matrix products", "description": "Showing that matrix products exhibit the distributive property", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oMWTMj78cwc.mp4/oMWTMj78cwc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oMWTMj78cwc.mp4/oMWTMj78cwc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oMWTMj78cwc.m3u8/oMWTMj78cwc.m3u8"}, "slug": "distributive-property-of-matrix-products", "video_id": "oMWTMj78cwc", "youtube_id": "oMWTMj78cwc", "readable_id": "distributive-property-of-matrix-products"}, "Qv2pgv8ea-k": {"duration": 110, "path": "khan/math/algebra2/conics_precalc/parabolas_precalc/parabola-intuition-example-1/", "keywords": "", "id": "Qv2pgv8ea-k", "title": "Parabola intuition example 1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qv2pgv8ea-k.mp4/Qv2pgv8ea-k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qv2pgv8ea-k.mp4/Qv2pgv8ea-k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qv2pgv8ea-k.m3u8/Qv2pgv8ea-k.m3u8"}, "slug": "parabola-intuition-example-1", "video_id": "Qv2pgv8ea-k", "youtube_id": "Qv2pgv8ea-k", "readable_id": "parabola-intuition-example-1"}, "zJ5w4YhOyN8": {"duration": 415, "path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/treatments-for-bipolar-disorder/", "keywords": "Bipolar Disorder (Disease Or Medical Condition),Mental Illness (Disease Or Medical Condition),Health (Industry)", "id": "zJ5w4YhOyN8", "title": "Treatments for bipolar disorder", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zJ5w4YhOyN8.mp4/zJ5w4YhOyN8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zJ5w4YhOyN8.mp4/zJ5w4YhOyN8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zJ5w4YhOyN8.m3u8/zJ5w4YhOyN8.m3u8"}, "slug": "treatments-for-bipolar-disorder", "video_id": "zJ5w4YhOyN8", "youtube_id": "zJ5w4YhOyN8", "readable_id": "treatments-for-bipolar-disorder"}, "HOMn523JBok": {"duration": 570, "path": "khan/science/organic-chemistry/stereochemistry-topic/optical-activity/drawing-enantiomers/", "keywords": "Enantiomer,drawing enantiomers,enantiomers", "id": "HOMn523JBok", "title": "Drawing enantiomers", "description": "How to draw enantiomers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HOMn523JBok.mp4/HOMn523JBok.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HOMn523JBok.mp4/HOMn523JBok.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HOMn523JBok.m3u8/HOMn523JBok.m3u8"}, "slug": "drawing-enantiomers", "video_id": "HOMn523JBok", "youtube_id": "HOMn523JBok", "readable_id": "drawing-enantiomers"}, "aeyFb2eVH1c": {"duration": 432, "path": "khan/math/algebra2/manipulating-functions/finding-inverse-functions/function-inverses-example-2/", "keywords": "Function, Inverses, Example, CC_39336_F-BF_4, CC_39336_F-BF_4_a, CC_39336_F-BF_4_d", "id": "aeyFb2eVH1c", "title": "How to find the inverse of a quadratic function (example)", "description": "Sal finds the inverse of f(x)=(x+2)^2+1.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aeyFb2eVH1c.mp4/aeyFb2eVH1c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aeyFb2eVH1c.mp4/aeyFb2eVH1c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aeyFb2eVH1c.m3u8/aeyFb2eVH1c.m3u8"}, "slug": "function-inverses-example-2", "video_id": "aeyFb2eVH1c", "youtube_id": "aeyFb2eVH1c", "readable_id": "function-inverses-example-2"}, "MtRXjXdXDow": {"duration": 558, "path": "khan/math/integral-calculus/solid_revolution_topic/arc-length/arc-length-example-2/", "keywords": "", "id": "MtRXjXdXDow", "title": "Another arc length integration example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MtRXjXdXDow.mp4/MtRXjXdXDow.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MtRXjXdXDow.mp4/MtRXjXdXDow.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MtRXjXdXDow.m3u8/MtRXjXdXDow.m3u8"}, "slug": "arc-length-example-2", "video_id": "MtRXjXdXDow", "youtube_id": "MtRXjXdXDow", "readable_id": "arc-length-example-2"}, "l_Qj6aC6RV8": {"duration": 96, "path": "khan/math/pre-algebra/fractions-pre-alg/decomposing-fractions-pre-alg/adding-up-to-a-fraction-drag-and-drop-example/", "keywords": "", "id": "l_Qj6aC6RV8", "title": "Adding up fractions", "description": "We need the sum of all the fractions to equal the given fraction. Can you help us choose which ones to use?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/l_Qj6aC6RV8.mp4/l_Qj6aC6RV8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/l_Qj6aC6RV8.mp4/l_Qj6aC6RV8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/l_Qj6aC6RV8.m3u8/l_Qj6aC6RV8.m3u8"}, "slug": "adding-up-to-a-fraction-drag-and-drop-example", "video_id": "l_Qj6aC6RV8", "youtube_id": "l_Qj6aC6RV8", "readable_id": "adding-up-to-a-fraction-drag-and-drop-example"}, "r6383ZDXB0Q": {"duration": 408, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/hagia-sophia-mosque/", "keywords": "Ottoman, mosque, Islam, Istanbul, Hagia Sophia, 1453", "id": "r6383ZDXB0Q", "title": "Hagia Sophia as a mosque", "description": "This video focuses on Hagia Sophia after the conquest of Constantinople by the Ottomans in 1453.\u00a0Speakers: Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/r6383ZDXB0Q.mp4/r6383ZDXB0Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/r6383ZDXB0Q.mp4/r6383ZDXB0Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/r6383ZDXB0Q.m3u8/r6383ZDXB0Q.m3u8"}, "slug": "hagia-sophia-mosque", "video_id": "r6383ZDXB0Q", "youtube_id": "r6383ZDXB0Q", "readable_id": "hagia-sophia-mosque"}, "S-mTwg73jCY": {"duration": 703, "path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/adjustable-rate-mortgages-arms/", "keywords": "", "id": "S-mTwg73jCY", "title": "Adjustable rate mortgages ARMs", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S-mTwg73jCY.mp4/S-mTwg73jCY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S-mTwg73jCY.mp4/S-mTwg73jCY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S-mTwg73jCY.m3u8/S-mTwg73jCY.m3u8"}, "slug": "adjustable-rate-mortgages-arms", "video_id": "S-mTwg73jCY", "youtube_id": "S-mTwg73jCY", "readable_id": "adjustable-rate-mortgages-arms"}, "PddbEVNMgTY": {"duration": 347, "path": "khan/partner-content/lebron-asks-subject/lebron-asks/lebron-asks-about-free-throws-versus-three-pointers/", "keywords": "probability, math, basketball", "id": "PddbEVNMgTY", "title": "Three pointer vs free throwing probability", "description": "Our friend and Cleveland Cavalier, LeBron James, asks Sal if there's a high probability of making three free throws in a row or one three-pointer. Before solving the problem, jot down what you think the answer will be!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PddbEVNMgTY.mp4/PddbEVNMgTY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PddbEVNMgTY.mp4/PddbEVNMgTY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PddbEVNMgTY.m3u8/PddbEVNMgTY.m3u8"}, "slug": "lebron-asks-about-free-throws-versus-three-pointers", "video_id": "PddbEVNMgTY", "youtube_id": "PddbEVNMgTY", "readable_id": "lebron-asks-about-free-throws-versus-three-pointers"}, "nO5me_5c8dM": {"duration": 384, "path": "khan/partner-content/wi-phi/value-theory-1/original-position/", "keywords": "", "id": "nO5me_5c8dM", "title": "Political: Original Position", "description": "Luvell introduces us to the original position -- an idea due to the most important political philosopher of the 20th Century, John Rawls. The original position is a way of thinking about what makes an institution or a society just.\n\nSpeaker: Dr. Luvell Anderson, Assistant Professor of Philosophy, The University of Memphis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nO5me_5c8dM.mp4/nO5me_5c8dM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nO5me_5c8dM.mp4/nO5me_5c8dM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nO5me_5c8dM.m3u8/nO5me_5c8dM.m3u8"}, "slug": "original-position", "video_id": "nO5me_5c8dM", "youtube_id": "nO5me_5c8dM", "readable_id": "original-position"}, "84NkvxfMPtM": {"duration": 209, "path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/orienting-boundary-with-surface/", "keywords": "stokes, theorem, orientation", "id": "84NkvxfMPtM", "title": "Orienting boundary with surface", "description": "Determining the proper orientation of the boundary given the orientation of the surface", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/84NkvxfMPtM.mp4/84NkvxfMPtM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/84NkvxfMPtM.mp4/84NkvxfMPtM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/84NkvxfMPtM.m3u8/84NkvxfMPtM.m3u8"}, "slug": "orienting-boundary-with-surface", "video_id": "84NkvxfMPtM", "youtube_id": "84NkvxfMPtM", "readable_id": "orienting-boundary-with-surface"}, "zd3RyRk6wYI": {"duration": 478, "path": "khan/math/precalculus/hyperbolic_trig_topic/hyperbolic_trig_intro/hyperbolic-trig-function-inspiration/", "keywords": "", "id": "zd3RyRk6wYI", "title": "Hyperbolic function inspiration", "description": "Exploring a motivation for even defining hyperbolic sine and cosine", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zd3RyRk6wYI.mp4/zd3RyRk6wYI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zd3RyRk6wYI.mp4/zd3RyRk6wYI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zd3RyRk6wYI.m3u8/zd3RyRk6wYI.m3u8"}, "slug": "hyperbolic-trig-function-inspiration", "video_id": "zd3RyRk6wYI", "youtube_id": "zd3RyRk6wYI", "readable_id": "hyperbolic-trig-function-inspiration"}, "NgPqyM3I_8o": {"duration": 545, "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/market-equilibrium-tutorial/changes-in-market-equilibrium/", "keywords": "supply, demand, economics", "id": "NgPqyM3I_8o", "title": "Changes in market equilibrium", "description": "How the equilibrium price or quantity might change due to changes in supply or demand", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NgPqyM3I_8o.mp4/NgPqyM3I_8o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NgPqyM3I_8o.mp4/NgPqyM3I_8o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NgPqyM3I_8o.m3u8/NgPqyM3I_8o.m3u8"}, "slug": "changes-in-market-equilibrium", "video_id": "NgPqyM3I_8o", "youtube_id": "NgPqyM3I_8o", "readable_id": "changes-in-market-equilibrium"}, "dc7l7Qqa8xk": {"duration": 636, "path": "khan/test-prep/mcat/physical-processes/sound/introduction-to-the-doppler-effect/", "keywords": "doppler, effect", "id": "dc7l7Qqa8xk", "title": "Introduction to the doppler effect", "description": "Introduction to the Doppler Effect", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dc7l7Qqa8xk.mp4/dc7l7Qqa8xk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dc7l7Qqa8xk.mp4/dc7l7Qqa8xk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dc7l7Qqa8xk.m3u8/dc7l7Qqa8xk.m3u8"}, "slug": "introduction-to-the-doppler-effect", "video_id": "dc7l7Qqa8xk", "youtube_id": "dc7l7Qqa8xk", "readable_id": "introduction-to-the-doppler-effect"}, "k5EbijWu-Ss": {"duration": 603, "path": "khan/math/probability/descriptive-statistics/central_tendency/statistics-sample-vs-population-mean/", "keywords": "statistics, sample, population, average, mean, parameter, statistic, CC_6_SP_3, CC_7_SP_1, CC_7_SP_2", "id": "k5EbijWu-Ss", "title": "Inferring population mean from sample mean", "description": "Much of statistics is based upon using data from a random sample that is representative of the population at large. From that sample mean, we can infer things about the greater population mean. We'll explain.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/k5EbijWu-Ss.mp4/k5EbijWu-Ss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/k5EbijWu-Ss.mp4/k5EbijWu-Ss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/k5EbijWu-Ss.m3u8/k5EbijWu-Ss.m3u8"}, "slug": "statistics-sample-vs-population-mean", "video_id": "k5EbijWu-Ss", "youtube_id": "k5EbijWu-Ss", "readable_id": "statistics-sample-vs-population-mean"}, "eCrQDI1OAeU": {"duration": 399, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/supraventricular-tachycardia/", "keywords": "", "id": "eCrQDI1OAeU", "title": "Supraventricular tachycardia (SVT)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eCrQDI1OAeU.mp4/eCrQDI1OAeU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eCrQDI1OAeU.mp4/eCrQDI1OAeU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eCrQDI1OAeU.m3u8/eCrQDI1OAeU.m3u8"}, "slug": "supraventricular-tachycardia", "video_id": "eCrQDI1OAeU", "youtube_id": "eCrQDI1OAeU", "readable_id": "supraventricular-tachycardia"}, "OiNh2DswFt4": {"duration": 481, "path": "khan/math/differential-equations/laplace-transform/laplace-transform-tutorial/laplace-transform-1/", "keywords": "laplace, transform", "id": "OiNh2DswFt4", "title": "Laplace transform 1", "description": "Introduction to the Laplace Transform", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OiNh2DswFt4.mp4/OiNh2DswFt4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OiNh2DswFt4.mp4/OiNh2DswFt4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OiNh2DswFt4.m3u8/OiNh2DswFt4.m3u8"}, "slug": "laplace-transform-1", "video_id": "OiNh2DswFt4", "youtube_id": "OiNh2DswFt4", "readable_id": "laplace-transform-1"}, "3jBfLaLrk6I": {"duration": 64, "path": "khan/math/pre-algebra/order-of-operations/rounding_whole_numbers/rounding-whole-numbers-3/", "keywords": "U01_L1_T2_we3, Rounding, Whole, Numbers, CC_3_OA_8, CC_4_NBT_3, CC_4_OA_3", "id": "3jBfLaLrk6I", "title": "Rounding whole numbers 3", "description": "You're becoming a pro at rounding whole numbers. Here's another example exercise. Can you do it first before watching the end of the video?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3jBfLaLrk6I.mp4/3jBfLaLrk6I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3jBfLaLrk6I.mp4/3jBfLaLrk6I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3jBfLaLrk6I.m3u8/3jBfLaLrk6I.m3u8"}, "slug": "rounding-whole-numbers-3", "video_id": "3jBfLaLrk6I", "youtube_id": "3jBfLaLrk6I", "readable_id": "rounding-whole-numbers-3"}, "ixKzDofqMrU": {"duration": 419, "path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-switchlogic/", "keywords": "", "id": "ixKzDofqMrU", "title": "Switch statements & logic", "description": "Control switch statments using logic", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ixKzDofqMrU.mp4/ixKzDofqMrU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ixKzDofqMrU.mp4/ixKzDofqMrU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ixKzDofqMrU.m3u8/ixKzDofqMrU.m3u8"}, "slug": "lego-switchlogic", "video_id": "ixKzDofqMrU", "youtube_id": "ixKzDofqMrU", "readable_id": "lego-switchlogic"}, "xUDlKV8lJbM": {"duration": 157, "path": "khan/math/pre-algebra/decimals-pre-alg/dividing-decimals-pre-alg/dividing-completely-to-get-decimal-answer/", "keywords": "", "id": "xUDlKV8lJbM", "title": "Dividing completely to get decimal answer", "description": "Sometimes, in order divide numbers completely you have to add a decimal and bring down places. Let's do it together, shall we?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xUDlKV8lJbM.mp4/xUDlKV8lJbM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xUDlKV8lJbM.mp4/xUDlKV8lJbM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xUDlKV8lJbM.m3u8/xUDlKV8lJbM.m3u8"}, "slug": "dividing-completely-to-get-decimal-answer", "video_id": "xUDlKV8lJbM", "youtube_id": "xUDlKV8lJbM", "readable_id": "dividing-completely-to-get-decimal-answer"}, "0VBQnR2h8XM": {"duration": 362, "path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formula-proofs/proof-angle-addition-cosine/", "keywords": "", "id": "0VBQnR2h8XM", "title": "Proof of angle addition formula for cosine", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0VBQnR2h8XM.mp4/0VBQnR2h8XM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0VBQnR2h8XM.mp4/0VBQnR2h8XM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0VBQnR2h8XM.m3u8/0VBQnR2h8XM.m3u8"}, "slug": "proof-angle-addition-cosine", "video_id": "0VBQnR2h8XM", "youtube_id": "0VBQnR2h8XM", "readable_id": "proof-angle-addition-cosine"}, "KCSGeTdjWiI": {"duration": 251, "path": "khan/partner-content/pixar/rendering/rendering-2/rendering-9/", "keywords": "", "id": "KCSGeTdjWiI", "title": "5. 3D ray tracing part 1", "description": "Now we are ready to ray trace in 3D. We'll look at the problem of ray triangle intersection.\nClick here for more detail on the plane equation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KCSGeTdjWiI.mp4/KCSGeTdjWiI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KCSGeTdjWiI.mp4/KCSGeTdjWiI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KCSGeTdjWiI.m3u8/KCSGeTdjWiI.m3u8"}, "slug": "rendering-9", "video_id": "KCSGeTdjWiI", "youtube_id": "KCSGeTdjWiI", "readable_id": "rendering-9"}, "VxEIsPOdOLw": {"duration": 625, "path": "khan/science/health-and-medicine/hematologic-system/bleeding-and-impaired-hemostasis/anticoagulation/", "keywords": "", "id": "VxEIsPOdOLw", "title": "Anticoagulation and thrombolysis", "description": "Anticoagulation is the process that prevents clots from forming. Thrombolysis is the process of breaking down clots after they\u2019ve been formed. Learn how the antithrombin III interacts with heparin-like molecules and how plasmin breaks down fibrin.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VxEIsPOdOLw.mp4/VxEIsPOdOLw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VxEIsPOdOLw.mp4/VxEIsPOdOLw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VxEIsPOdOLw.m3u8/VxEIsPOdOLw.m3u8"}, "slug": "anticoagulation", "video_id": "VxEIsPOdOLw", "youtube_id": "VxEIsPOdOLw", "readable_id": "anticoagulation"}, "UpGsouOnxOU": {"duration": 308, "path": "khan/humanities/art-history-basics/art-1010/tice-art-1010-medieval-and-byzantine-art-mp4/", "keywords": "Medieval, Byzantine, art", "id": "UpGsouOnxOU", "title": "Medieval and Byzantine art", "description": "A video from the Utah System of Higher Education (with special thanks to Dr. Nancy Ross). Video by Ydraw.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UpGsouOnxOU.mp4/UpGsouOnxOU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UpGsouOnxOU.mp4/UpGsouOnxOU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UpGsouOnxOU.m3u8/UpGsouOnxOU.m3u8"}, "slug": "tice-art-1010-medieval-and-byzantine-art-mp4", "video_id": "UpGsouOnxOU", "youtube_id": "UpGsouOnxOU", "readable_id": "tice-art-1010-medieval-and-byzantine-art-mp4"}, "5d63YMUxcS4": {"duration": 468, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-preparation-epoxides/cyclic-ethers-and-epoxide-naming/", "keywords": "Cyclic, ethers, and, epoxide, naming", "id": "5d63YMUxcS4", "title": "Cyclic ethers and epoxide naming", "description": "Cyclic ethers and epoxide naming", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5d63YMUxcS4.mp4/5d63YMUxcS4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5d63YMUxcS4.mp4/5d63YMUxcS4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5d63YMUxcS4.m3u8/5d63YMUxcS4.m3u8"}, "slug": "cyclic-ethers-and-epoxide-naming", "video_id": "5d63YMUxcS4", "youtube_id": "5d63YMUxcS4", "readable_id": "cyclic-ethers-and-epoxide-naming"}, "4qY9icExjEw": {"duration": 383, "path": "khan/college-admissions/applying-to-college/admissions-interviews/succeeding-at-the-admissions-interview/", "keywords": "", "id": "4qY9icExjEw", "title": "Succeeding at the college admissions interview", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4qY9icExjEw.mp4/4qY9icExjEw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4qY9icExjEw.mp4/4qY9icExjEw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4qY9icExjEw.m3u8/4qY9icExjEw.m3u8"}, "slug": "succeeding-at-the-admissions-interview", "video_id": "4qY9icExjEw", "youtube_id": "4qY9icExjEw", "readable_id": "succeeding-at-the-admissions-interview"}, "ZGl2ExHwdak": {"duration": 104, "path": "khan/math/algebra-basics/quadratics-polynomials-topic/polynomial-basics-core-algebra/adding-and-subtracting-polynomials-2/", "keywords": "U08_L2_T2_we2, Adding, and, Subtracting, Polynomials, CC_39336_A-APR_1", "id": "ZGl2ExHwdak", "title": "Adding and subtracting polynomials", "description": "Simplify: (16x + 14) - (3x^2 + x - 9)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZGl2ExHwdak.mp4/ZGl2ExHwdak.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZGl2ExHwdak.mp4/ZGl2ExHwdak.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZGl2ExHwdak.m3u8/ZGl2ExHwdak.m3u8"}, "slug": "adding-and-subtracting-polynomials-2", "video_id": "ZGl2ExHwdak", "youtube_id": "ZGl2ExHwdak", "readable_id": "adding-and-subtracting-polynomials-2"}, "GvbrtnEYRpY": {"duration": 394, "path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/u03-l1-t1-we2-inductive-patterns/", "keywords": "U03, L1, T1, we2, Inductive, Patterns", "id": "GvbrtnEYRpY", "title": "Inductive patterns", "description": "Inductive Patterns", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GvbrtnEYRpY.mp4/GvbrtnEYRpY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GvbrtnEYRpY.mp4/GvbrtnEYRpY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GvbrtnEYRpY.m3u8/GvbrtnEYRpY.m3u8"}, "slug": "u03-l1-t1-we2-inductive-patterns", "video_id": "GvbrtnEYRpY", "youtube_id": "GvbrtnEYRpY", "readable_id": "u03-l1-t1-we2-inductive-patterns"}, "44ZkTayk2hk": {"duration": 200, "path": "khan/humanities/global-culture/global-art-architecture/shai-kremer/", "keywords": "Tate", "id": "44ZkTayk2hk", "title": "Shai Kremer in an Israeli military training stage", "description": "This video brought to you by\u00a0Tate.org.uk\n\nIsraeli photographer and former solider Shai Kremer invites us into an expansive military training ground. Kremer snuck into an Israeli training compound\u2014or \u201cstage\u201d\u2014for urban military manoeuvres and took photographs of the exercises taking place within. Hiding from an hourly patrol, Kremer secretly took photos of this fake city in hopes of raising discussion about what he see as the militarisation of society. Although it seems empty from afar, looking more closely at Kremer\u2019s photograph reveals even more details.\nWhat message do you think Kremer is trying to convey in this photograph? Is he supportive or against what he sees\u2014or neither?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/44ZkTayk2hk.mp4/44ZkTayk2hk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/44ZkTayk2hk.mp4/44ZkTayk2hk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/44ZkTayk2hk.m3u8/44ZkTayk2hk.m3u8"}, "slug": "shai-kremer", "video_id": "44ZkTayk2hk", "youtube_id": "44ZkTayk2hk", "readable_id": "shai-kremer"}, "25mxf_xUqDQ": {"duration": 289, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/celiac-disease-rn/what-is-gluten/", "keywords": "Gluten (Chemical Classification),Nutrition (Medical Specialty),Medicine (Field Of Study)", "id": "25mxf_xUqDQ", "title": "What is gluten?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/25mxf_xUqDQ.mp4/25mxf_xUqDQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/25mxf_xUqDQ.mp4/25mxf_xUqDQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/25mxf_xUqDQ.m3u8/25mxf_xUqDQ.m3u8"}, "slug": "what-is-gluten", "video_id": "25mxf_xUqDQ", "youtube_id": "25mxf_xUqDQ", "readable_id": "what-is-gluten"}, "g3LrOw1JMi8": {"duration": 163, "path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-and-range-of-a-relation/", "keywords": "u17_l1_t1_we1, Domain, and, Range, of, Relation", "id": "g3LrOw1JMi8", "title": "Domain and range of a relation", "description": "Domain and Range of a Relation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g3LrOw1JMi8.mp4/g3LrOw1JMi8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g3LrOw1JMi8.mp4/g3LrOw1JMi8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g3LrOw1JMi8.m3u8/g3LrOw1JMi8.m3u8"}, "slug": "domain-and-range-of-a-relation", "video_id": "g3LrOw1JMi8", "youtube_id": "g3LrOw1JMi8", "readable_id": "domain-and-range-of-a-relation"}, "LxnX9-xUMvs": {"duration": 457, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-literature-questions/", "keywords": "", "id": "LxnX9-xUMvs", "title": "Reading: Literature \u2014 How-to Part 2", "description": "Watch Sal work through Part 2 of an SAT Reading: Literature passage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LxnX9-xUMvs.mp4/LxnX9-xUMvs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LxnX9-xUMvs.mp4/LxnX9-xUMvs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LxnX9-xUMvs.m3u8/LxnX9-xUMvs.m3u8"}, "slug": "reading-literature-questions", "video_id": "LxnX9-xUMvs", "youtube_id": "LxnX9-xUMvs", "readable_id": "reading-literature-questions"}, "FN1qz8tp89g": {"duration": 336, "path": "khan/test-prep/ap-art-history/africa-ap/sande-bundu/", "keywords": "mask,helmet mask,Sande Society,Mende (City/Town/Village),Africa,Smarthistory,Art History (Field Of Study),Brooklyn Museum (Museum)", "id": "FN1qz8tp89g", "title": "Bundu or Sowei Helmet Mask", "description": "Bundu\u00a0or Sowei Helmet Mask (Ndoli Jowei), Mende, Nguabu Master (Moyamba district, Sierra Leone), late 19th-early 20th century, wood and pigment, 39.4 x 23.5 x 26 cm (Brooklyn Museum) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FN1qz8tp89g.mp4/FN1qz8tp89g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FN1qz8tp89g.mp4/FN1qz8tp89g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FN1qz8tp89g.m3u8/FN1qz8tp89g.m3u8"}, "slug": "sande-bundu", "video_id": "FN1qz8tp89g", "youtube_id": "FN1qz8tp89g", "readable_id": "sande-bundu"}, "g3kDdg8r6NY": {"duration": 825, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/atherosclerosis/", "keywords": "", "id": "g3kDdg8r6NY", "title": "Atherosclerosis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g3kDdg8r6NY.mp4/g3kDdg8r6NY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g3kDdg8r6NY.mp4/g3kDdg8r6NY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g3kDdg8r6NY.m3u8/g3kDdg8r6NY.m3u8"}, "slug": "atherosclerosis", "video_id": "g3kDdg8r6NY", "youtube_id": "g3kDdg8r6NY", "readable_id": "atherosclerosis"}, "OhISsmqv4_8": {"duration": 423, "path": "khan/math/integral-calculus/solid_revolution_topic/arc-length/arc-length-example/", "keywords": "", "id": "OhISsmqv4_8", "title": "Arc length integration example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OhISsmqv4_8.mp4/OhISsmqv4_8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OhISsmqv4_8.mp4/OhISsmqv4_8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OhISsmqv4_8.m3u8/OhISsmqv4_8.m3u8"}, "slug": "arc-length-example", "video_id": "OhISsmqv4_8", "youtube_id": "OhISsmqv4_8", "readable_id": "arc-length-example"}, "Ihws0d-WLzU": {"duration": 546, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/conv_rep_decimals/coverting-repeating-decimals-to-fractions-2/", "keywords": "Coverting, Repeating, Decimals, to, Fractions, 2", "id": "Ihws0d-WLzU", "title": "How to convert repeating decimals into fractions (part 2)", "description": "Learn how to convert the repeating decimals 0.363636... and 0.714714714... and 3.257257257... to fractions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ihws0d-WLzU.mp4/Ihws0d-WLzU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ihws0d-WLzU.mp4/Ihws0d-WLzU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ihws0d-WLzU.m3u8/Ihws0d-WLzU.m3u8"}, "slug": "coverting-repeating-decimals-to-fractions-2", "video_id": "Ihws0d-WLzU", "youtube_id": "Ihws0d-WLzU", "readable_id": "coverting-repeating-decimals-to-fractions-2"}, "kVulo3qDcUo": {"duration": 272, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/cerebral-blood-supply-part-2/", "keywords": "", "id": "kVulo3qDcUo", "title": "Cerebral blood supply: Part 2", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kVulo3qDcUo.mp4/kVulo3qDcUo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kVulo3qDcUo.mp4/kVulo3qDcUo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kVulo3qDcUo.m3u8/kVulo3qDcUo.m3u8"}, "slug": "cerebral-blood-supply-part-2", "video_id": "kVulo3qDcUo", "youtube_id": "kVulo3qDcUo", "readable_id": "cerebral-blood-supply-part-2"}, "hleYHNMDnBE": {"duration": 403, "path": "khan/partner-content/big-history-project/early-humans/other-materials6/bhp-migrations-technology/", "keywords": "", "id": "hleYHNMDnBE", "title": "Migrations and Technological Creativity", "description": "Journey with Craig Benjamin through 250,000 years of technological creativity and human migration. Explore how our species has had to adapt, change, and migrate to survive.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hleYHNMDnBE.mp4/hleYHNMDnBE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hleYHNMDnBE.mp4/hleYHNMDnBE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hleYHNMDnBE.m3u8/hleYHNMDnBE.m3u8"}, "slug": "bhp-migrations-technology", "video_id": "hleYHNMDnBE", "youtube_id": "hleYHNMDnBE", "readable_id": "bhp-migrations-technology"}, "ALJGz4r_VF0": {"duration": 1222, "path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/napoleon-s-peninsular-campaigns/", "keywords": "napoleon, spain, portugal, austria", "id": "ALJGz4r_VF0", "title": "Napoleon's Peninsular Campaigns", "description": "French forces get embroiled in the Iberian Peninsula", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ALJGz4r_VF0.mp4/ALJGz4r_VF0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ALJGz4r_VF0.mp4/ALJGz4r_VF0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ALJGz4r_VF0.m3u8/ALJGz4r_VF0.m3u8"}, "slug": "napoleon-s-peninsular-campaigns", "video_id": "ALJGz4r_VF0", "youtube_id": "ALJGz4r_VF0", "readable_id": "napoleon-s-peninsular-campaigns"}, "7vHh1sfZ5KE": {"duration": 668, "path": "khan/test-prep/mcat/physical-processes/current-and-resistance/circuits-part-2/", "keywords": "series, resistors", "id": "7vHh1sfZ5KE", "title": "Resistors in series", "description": "Resistors in series", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7vHh1sfZ5KE.mp4/7vHh1sfZ5KE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7vHh1sfZ5KE.mp4/7vHh1sfZ5KE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7vHh1sfZ5KE.m3u8/7vHh1sfZ5KE.m3u8"}, "slug": "circuits-part-2", "video_id": "7vHh1sfZ5KE", "youtube_id": "7vHh1sfZ5KE", "readable_id": "circuits-part-2"}, "rs1md3e4aYU": {"duration": 561, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/bonds-vs-stocks/", "keywords": "stocks, bonds, equity, debt", "id": "rs1md3e4aYU", "title": "Bonds vs. stocks", "description": "The difference between a bond and a stock.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rs1md3e4aYU.mp4/rs1md3e4aYU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rs1md3e4aYU.mp4/rs1md3e4aYU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rs1md3e4aYU.m3u8/rs1md3e4aYU.m3u8"}, "slug": "bonds-vs-stocks", "video_id": "rs1md3e4aYU", "youtube_id": "rs1md3e4aYU", "readable_id": "bonds-vs-stocks"}, "Z3X6QqezqUg": {"duration": 556, "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-2-a-b/", "keywords": "trapezoidal, sum, integration, differentiation", "id": "Z3X6QqezqUg", "title": "2011 Calculus AB free response #2 (a & b)", "description": "Approximating rate of change and total area under a curve. Trapezoidal sums to approximate integrals", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z3X6QqezqUg.mp4/Z3X6QqezqUg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z3X6QqezqUg.mp4/Z3X6QqezqUg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z3X6QqezqUg.m3u8/Z3X6QqezqUg.m3u8"}, "slug": "2011-calculus-ab-free-response-2-a-b", "video_id": "Z3X6QqezqUg", "youtube_id": "Z3X6QqezqUg", "readable_id": "2011-calculus-ab-free-response-2-a-b"}, "5DlzmolR8Cg": {"duration": 166, "path": "khan/math/pre-algebra/decimals-pre-alg/decimal-place-value-pre-alg/writing-a-decimal-to-represent-a-quantity/", "keywords": "", "id": "5DlzmolR8Cg", "title": "Decimals: writing it out as a number", "description": "Take your time and remember your order of operations as you translate this into a decimal number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5DlzmolR8Cg.mp4/5DlzmolR8Cg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5DlzmolR8Cg.mp4/5DlzmolR8Cg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5DlzmolR8Cg.m3u8/5DlzmolR8Cg.m3u8"}, "slug": "writing-a-decimal-to-represent-a-quantity", "video_id": "5DlzmolR8Cg", "youtube_id": "5DlzmolR8Cg", "readable_id": "writing-a-decimal-to-represent-a-quantity"}, "pWM5ONbMPeE": {"duration": 56, "path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/comparing-colleges-major-offered/", "keywords": "", "id": "pWM5ONbMPeE", "title": "Comparing colleges based on majors offered", "description": "Filter by major offered using College Board's college search tool", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pWM5ONbMPeE.mp4/pWM5ONbMPeE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pWM5ONbMPeE.mp4/pWM5ONbMPeE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pWM5ONbMPeE.m3u8/pWM5ONbMPeE.m3u8"}, "slug": "comparing-colleges-major-offered", "video_id": "pWM5ONbMPeE", "youtube_id": "pWM5ONbMPeE", "readable_id": "comparing-colleges-major-offered"}, "QvdMC_wY_K4": {"duration": 150, "path": "khan/humanities/art-asia/imperial-china/song-dynasty/metaphorical/", "keywords": "light, nature, painting, politics, silk, Asia", "id": "QvdMC_wY_K4", "title": "Liang Kai, Poet Strolling by a Marshy Bank", "description": "Met curator Shi-yee Liu on illusory nature in Liang Kai\u2019s Poet Strolling by a Marshy Bank,\u00a0first half of the 13th century.\n\nLiang Kai served as a painter-in-attendance at the Song Imperial Painting Academy in Hangzhou from about 1201 to 1204; he relinquished that prestigious position to live and paint at a Chan (Zen in Japanese) Buddhist temple. Like his best-known paintings, preserved mostly in Japanese collections, this small landscape conveys a spiritual intensity. Under the great cliff, in the stillness of the landscape, a solitary figure meditates on the illusory world before him.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, try this and also visit Find an educator resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QvdMC_wY_K4.mp4/QvdMC_wY_K4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QvdMC_wY_K4.mp4/QvdMC_wY_K4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QvdMC_wY_K4.m3u8/QvdMC_wY_K4.m3u8"}, "slug": "metaphorical", "video_id": "QvdMC_wY_K4", "youtube_id": "QvdMC_wY_K4", "readable_id": "metaphorical"}, "kZZGwa7ITt0": {"duration": 158, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p13-harder/", "keywords": "", "id": "kZZGwa7ITt0", "title": "Function notation \u2014 Harder example", "description": "Watch Sal work through a harder Function notation problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kZZGwa7ITt0.mp4/kZZGwa7ITt0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kZZGwa7ITt0.mp4/kZZGwa7ITt0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kZZGwa7ITt0.m3u8/kZZGwa7ITt0.m3u8"}, "slug": "sat-math-p13-harder", "video_id": "kZZGwa7ITt0", "youtube_id": "kZZGwa7ITt0", "readable_id": "sat-math-p13-harder"}, "QcAr1552o84": {"duration": 627, "path": "khan/test-prep/gmat/problem-solving/gmat-math-37/", "keywords": "gmat, math, problem, solving", "id": "QcAr1552o84", "title": "GMAT: Math 37", "description": "185-189, pgs. 177-178", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QcAr1552o84.mp4/QcAr1552o84.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QcAr1552o84.mp4/QcAr1552o84.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QcAr1552o84.m3u8/QcAr1552o84.m3u8"}, "slug": "gmat-math-37", "video_id": "QcAr1552o84", "youtube_id": "QcAr1552o84", "readable_id": "gmat-math-37"}, "6nUMiJfHLSA": {"duration": 492, "path": "khan/math/geometry/transformations/hs-geo-rotations/points-after-rotation/", "keywords": "", "id": "6nUMiJfHLSA", "title": "How the draw the image of a rotation about the origin (example)", "description": "Sal is given a triangle on the coordinate plane and the definition of a rotation about the origin, and he manually draws the image of that rotation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6nUMiJfHLSA.mp4/6nUMiJfHLSA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6nUMiJfHLSA.mp4/6nUMiJfHLSA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6nUMiJfHLSA.m3u8/6nUMiJfHLSA.m3u8"}, "slug": "points-after-rotation", "video_id": "6nUMiJfHLSA", "youtube_id": "6nUMiJfHLSA", "readable_id": "points-after-rotation"}, "WX4T9NjYG94": {"duration": 543, "path": "khan/humanities/history/euro-hist/other-fronts-ww1/serbian-and-macedonian-fronts/", "keywords": "", "id": "WX4T9NjYG94", "title": "Serbian and Macedonian fronts", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WX4T9NjYG94.mp4/WX4T9NjYG94.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WX4T9NjYG94.mp4/WX4T9NjYG94.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WX4T9NjYG94.m3u8/WX4T9NjYG94.m3u8"}, "slug": "serbian-and-macedonian-fronts", "video_id": "WX4T9NjYG94", "youtube_id": "WX4T9NjYG94", "readable_id": "serbian-and-macedonian-fronts"}, "S9pTSmXmXH8": {"duration": 332, "path": "khan/math/algebra/introduction-to-algebra/manipulating-expressions/equivalent-forms-of-expressions-1/", "keywords": "", "id": "S9pTSmXmXH8", "title": "Equivalent forms of expressions", "description": "We're looking to find the expressions that are equivalent to a given expression that can be simplified. Give it a try with us.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S9pTSmXmXH8.mp4/S9pTSmXmXH8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S9pTSmXmXH8.mp4/S9pTSmXmXH8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S9pTSmXmXH8.m3u8/S9pTSmXmXH8.m3u8"}, "slug": "equivalent-forms-of-expressions-1", "video_id": "S9pTSmXmXH8", "youtube_id": "S9pTSmXmXH8", "readable_id": "equivalent-forms-of-expressions-1"}, "mYUE-gH9IyQ": {"duration": 115, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/possessive-determiners-basic/", "keywords": "education,online learning,learning,lessons", "id": "mYUE-gH9IyQ", "title": "Writing: Possessive determiners \u2014 Basic example", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0possessive determiners.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mYUE-gH9IyQ.mp4/mYUE-gH9IyQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mYUE-gH9IyQ.mp4/mYUE-gH9IyQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mYUE-gH9IyQ.m3u8/mYUE-gH9IyQ.m3u8"}, "slug": "possessive-determiners-basic", "video_id": "mYUE-gH9IyQ", "youtube_id": "mYUE-gH9IyQ", "readable_id": "possessive-determiners-basic"}, "we829K4NOq8": {"duration": 974, "path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/lin-alg-projections-onto-subspaces-with-orthonormal-bases/", "keywords": "projection, orthonormal, basis", "id": "we829K4NOq8", "title": "Projections onto subspaces with orthonormal bases", "description": "Projections onto subspaces with orthonormal bases", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/we829K4NOq8.mp4/we829K4NOq8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/we829K4NOq8.mp4/we829K4NOq8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/we829K4NOq8.m3u8/we829K4NOq8.m3u8"}, "slug": "lin-alg-projections-onto-subspaces-with-orthonormal-bases", "video_id": "we829K4NOq8", "youtube_id": "we829K4NOq8", "readable_id": "lin-alg-projections-onto-subspaces-with-orthonormal-bases"}, "ryycDVWXDvc": {"duration": 303, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-egypt-ap/house-altar-depicting-akhenaten-nefertiti-and-three-daughters/", "keywords": "Nefertiti (Noble Person), House Altar, Akhenaten, Nefertiti, Egyptian Children, Royal Children, limestone, New Kingdom, Amarna, 18th dynasty, 1350 BCE, \u00c4gyptisches, Egypt, Museum, Berlin, Ancient, monotheism, polytheism, Amun, Aten, Sun God, Family, King, Pharoah", "id": "ryycDVWXDvc", "title": "Akhenaten, Nefertiti, and Three Daughters", "description": "House Altar depicting Akhenaten, Nefertiti and Three of their Daughters, limestone, New Kingdom, Amarna period, 18th dynasty, c.1350 BCE (\u00c4gyptisches Museum/Neues Museum, Staatliche Museen zu Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ryycDVWXDvc.mp4/ryycDVWXDvc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ryycDVWXDvc.mp4/ryycDVWXDvc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ryycDVWXDvc.m3u8/ryycDVWXDvc.m3u8"}, "slug": "house-altar-depicting-akhenaten-nefertiti-and-three-daughters", "video_id": "ryycDVWXDvc", "youtube_id": "ryycDVWXDvc", "readable_id": "house-altar-depicting-akhenaten-nefertiti-and-three-daughters"}, "AcNDiCzz3do": {"duration": 586, "path": "khan/test-prep/mcat/biomolecules/overview-metabolism/atp-hydrolysis-transfer-of-a-phosphate-group/", "keywords": "", "id": "AcNDiCzz3do", "title": "ATP hydrolysis: Transfer of a phosphate group", "description": "How is ATP coupled to energy-requiring processes? How does the transfer of a phosphate group \"fuel\" chemical reactions?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AcNDiCzz3do.mp4/AcNDiCzz3do.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AcNDiCzz3do.mp4/AcNDiCzz3do.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AcNDiCzz3do.m3u8/AcNDiCzz3do.m3u8"}, "slug": "atp-hydrolysis-transfer-of-a-phosphate-group", "video_id": "AcNDiCzz3do", "youtube_id": "AcNDiCzz3do", "readable_id": "atp-hydrolysis-transfer-of-a-phosphate-group"}, "m5xu4r0szaA": {"duration": 927, "path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/american-chinese-debt-loop/", "keywords": "china, america, us, debt, currency, crisis", "id": "m5xu4r0szaA", "title": "American-Chinese debt loop", "description": "How the Chinese buying of American debt leads to lower interest rates", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/m5xu4r0szaA.mp4/m5xu4r0szaA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/m5xu4r0szaA.mp4/m5xu4r0szaA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/m5xu4r0szaA.m3u8/m5xu4r0szaA.m3u8"}, "slug": "american-chinese-debt-loop", "video_id": "m5xu4r0szaA", "youtube_id": "m5xu4r0szaA", "readable_id": "american-chinese-debt-loop"}, "f8B2dBQn3_U": {"duration": 264, "path": "khan/math/pre-algebra/decimals-pre-alg/comparing-decimals-pre-alg/comparing-decimals-2-example/", "keywords": "", "id": "f8B2dBQn3_U", "title": "Comparing decimals: difference in largest place value", "description": "Confused trying to determine which decimal is larger? Let's compare two decimals in this example. Remember that you're looking for the difference is the largest place value to find the larger decimal.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/f8B2dBQn3_U.mp4/f8B2dBQn3_U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/f8B2dBQn3_U.mp4/f8B2dBQn3_U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/f8B2dBQn3_U.m3u8/f8B2dBQn3_U.m3u8"}, "slug": "comparing-decimals-2-example", "video_id": "f8B2dBQn3_U", "youtube_id": "f8B2dBQn3_U", "readable_id": "comparing-decimals-2-example"}, "jxptCXHLxKQ": {"duration": 264, "path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/refraction-in-water/", "keywords": "Refraction, in, Water", "id": "jxptCXHLxKQ", "title": "Refraction in water", "description": "Refraction in Water", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jxptCXHLxKQ.mp4/jxptCXHLxKQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jxptCXHLxKQ.mp4/jxptCXHLxKQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jxptCXHLxKQ.m3u8/jxptCXHLxKQ.m3u8"}, "slug": "refraction-in-water", "video_id": "jxptCXHLxKQ", "youtube_id": "jxptCXHLxKQ", "readable_id": "refraction-in-water"}, "e523Snw21Hk": {"duration": 280, "path": "khan/humanities/global-culture/global-art-architecture/meschac-gaba/", "keywords": "Tate", "id": "e523Snw21Hk", "title": "Meschac Gaba", "description": "This video brought to you by\u00a0Tate.org.uk\n\nDrawing his greatest inspiration from his hometown of Cotonou, Benin, artist Meschac Gaba uses the city as his workspace and presentation site. Take a look as Gaba parades his work through the street, encouraging passersby to engage with his art, questioning what contemporary African art is and where it dwells. Find out what the artist means when he says, \"The Africa I come from, a lot of people don't know this Africa.\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e523Snw21Hk.mp4/e523Snw21Hk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e523Snw21Hk.mp4/e523Snw21Hk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e523Snw21Hk.m3u8/e523Snw21Hk.m3u8"}, "slug": "meschac-gaba", "video_id": "e523Snw21Hk", "youtube_id": "e523Snw21Hk", "readable_id": "meschac-gaba"}, "_LDR1_Prveo": {"duration": 438, "path": "khan/math/algebra/introduction-to-algebra/overview_hist_alg/origins-of-algebra/", "keywords": "algebra, kwarizmi, diophantus, brahmagupta, marquee", "id": "_LDR1_Prveo", "title": "Origins of algebra", "description": "Where did the word \"Algebra\" and its underlying ideas come from?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_LDR1_Prveo.mp4/_LDR1_Prveo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_LDR1_Prveo.mp4/_LDR1_Prveo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_LDR1_Prveo.m3u8/_LDR1_Prveo.m3u8"}, "slug": "origins-of-algebra", "video_id": "_LDR1_Prveo", "youtube_id": "_LDR1_Prveo", "readable_id": "origins-of-algebra"}, "afgbUjRYt3A": {"duration": 75, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-13/", "keywords": "", "id": "afgbUjRYt3A", "title": "13 Difference between number and square", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/afgbUjRYt3A.mp4/afgbUjRYt3A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/afgbUjRYt3A.mp4/afgbUjRYt3A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/afgbUjRYt3A.m3u8/afgbUjRYt3A.m3u8"}, "slug": "sat-getting-ready-2-13", "video_id": "afgbUjRYt3A", "youtube_id": "afgbUjRYt3A", "readable_id": "sat-getting-ready-2-13"}, "lfeXuK8pbFw": {"duration": 682, "path": "khan/science/biology/cellular-respiration-and-fermentation/variations-on-cellular-respiration/lactic-acid-fermentation/", "keywords": "education,online learning,learning,lessons,Lactic Acid Fermentation,Lactic Acid (Chemical Compound),Fermentation (Literature Subject),NAD,NADH,Nicotinamide Adenine Dinucleotide (Chemical Compound)", "id": "lfeXuK8pbFw", "title": "Lactic acid fermentation", "description": "Lactic acid fermentation. How organisms like lactobacillus convert pyruvic acid to lactic acid and oxidize NADH to NAD+ in the process.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lfeXuK8pbFw.mp4/lfeXuK8pbFw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lfeXuK8pbFw.mp4/lfeXuK8pbFw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lfeXuK8pbFw.m3u8/lfeXuK8pbFw.m3u8"}, "slug": "lactic-acid-fermentation", "video_id": "lfeXuK8pbFw", "youtube_id": "lfeXuK8pbFw", "readable_id": "lactic-acid-fermentation"}, "Sa3FyvaKYVw": {"duration": 315, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/kandinsky-improv28/", "keywords": "Kandinsky,abstraction,abstract,modern art,modern,Russian,Russia,art,Germany,Solomon R. Guggenheim Museum (Museum),Painting (Visual Art Form)", "id": "Sa3FyvaKYVw", "title": "Kandinsky, Improvisation 28 (second version), 1912", "description": "Vasily Kandinsky, Improvisation 28 (second version), 1912, oil on canvas, 111.4 x 162.1 cm (Solomon R. Guggenheim Museum, New York) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Sa3FyvaKYVw.mp4/Sa3FyvaKYVw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Sa3FyvaKYVw.mp4/Sa3FyvaKYVw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Sa3FyvaKYVw.m3u8/Sa3FyvaKYVw.m3u8"}, "slug": "kandinsky-improv28", "video_id": "Sa3FyvaKYVw", "youtube_id": "Sa3FyvaKYVw", "readable_id": "kandinsky-improv28"}, "2uzDuGp0HQ0": {"duration": 128, "path": "khan/science/discoveries-projects/discoveries/measure-magnets/inverse-square-law-method-of-oscillation/", "keywords": "inverse square", "id": "2uzDuGp0HQ0", "title": "Inverse cube law (method of oscillation)", "description": "Here we compare the speed of compass oscillation vs. distance from a magnet. What kind of relationship do we observe. Is it linear?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2uzDuGp0HQ0.mp4/2uzDuGp0HQ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2uzDuGp0HQ0.mp4/2uzDuGp0HQ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2uzDuGp0HQ0.m3u8/2uzDuGp0HQ0.m3u8"}, "slug": "inverse-square-law-method-of-oscillation", "video_id": "2uzDuGp0HQ0", "youtube_id": "2uzDuGp0HQ0", "readable_id": "inverse-square-law-method-of-oscillation"}, "SgKBBUFaGb4": {"duration": 338, "path": "khan/math/algebra/linear_inequalities/inequalities/multi-step-inequalities-3/", "keywords": "u10_l2_t2_we1, Multi-Step, Inequalities, CC_6_EE_8, CC_6_NS_6_c, CC_6_NS_7_a, CC_7_EE_4, CC_39336_A-CED_1, CC_39336_A-CED_3, CC_39336_A-REI_3", "id": "SgKBBUFaGb4", "title": "Multi-step inequalities 3", "description": "Multi-Step Inequalities", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SgKBBUFaGb4.mp4/SgKBBUFaGb4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SgKBBUFaGb4.mp4/SgKBBUFaGb4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SgKBBUFaGb4.m3u8/SgKBBUFaGb4.m3u8"}, "slug": "multi-step-inequalities-3", "video_id": "SgKBBUFaGb4", "youtube_id": "SgKBBUFaGb4", "readable_id": "multi-step-inequalities-3"}, "kXf8MkpALrc": {"duration": 265, "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-cholera/", "keywords": "Cholera (Disease Or Medical Condition),Health (Industry)", "id": "kXf8MkpALrc", "title": "What is cholera?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kXf8MkpALrc.mp4/kXf8MkpALrc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kXf8MkpALrc.mp4/kXf8MkpALrc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kXf8MkpALrc.m3u8/kXf8MkpALrc.m3u8"}, "slug": "what-is-cholera", "video_id": "kXf8MkpALrc", "youtube_id": "kXf8MkpALrc", "readable_id": "what-is-cholera"}, "BCEyKQQOl8E": {"duration": 593, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-29/", "keywords": "gmat, data, sufficiency", "id": "BCEyKQQOl8E", "title": "GMAT: Data sufficiency 29", "description": "119-120, pg. 288", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BCEyKQQOl8E.mp4/BCEyKQQOl8E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BCEyKQQOl8E.mp4/BCEyKQQOl8E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BCEyKQQOl8E.m3u8/BCEyKQQOl8E.m3u8"}, "slug": "gmat-data-sufficiency-29", "video_id": "BCEyKQQOl8E", "youtube_id": "BCEyKQQOl8E", "readable_id": "gmat-data-sufficiency-29"}, "Xt4sT0fV9Pw": {"duration": 466, "path": "khan/math/geometry/triangle-properties/medians_centroids/medians-divide-into-smaller-triangles-of-equal-area/", "keywords": "Medians, divide, into, smaller, triangles, of, equal, area", "id": "Xt4sT0fV9Pw", "title": "Medians divide into smaller triangles of equal area", "description": "Showing that the three medians of a triangle divide it into six smaller triangles of equal area. Brief discussion of the centroid as well", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Xt4sT0fV9Pw.mp4/Xt4sT0fV9Pw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Xt4sT0fV9Pw.mp4/Xt4sT0fV9Pw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Xt4sT0fV9Pw.m3u8/Xt4sT0fV9Pw.m3u8"}, "slug": "medians-divide-into-smaller-triangles-of-equal-area", "video_id": "Xt4sT0fV9Pw", "youtube_id": "Xt4sT0fV9Pw", "readable_id": "medians-divide-into-smaller-triangles-of-equal-area"}, "nG7yosFQHP4": {"duration": 740, "path": "khan/test-prep/mcat/individuals-and-society/self-identity/freuds-psychosexual-development/", "keywords": "", "id": "nG7yosFQHP4", "title": "Freud's psychosexual development", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nG7yosFQHP4.mp4/nG7yosFQHP4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nG7yosFQHP4.mp4/nG7yosFQHP4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nG7yosFQHP4.m3u8/nG7yosFQHP4.m3u8"}, "slug": "freuds-psychosexual-development", "video_id": "nG7yosFQHP4", "youtube_id": "nG7yosFQHP4", "readable_id": "freuds-psychosexual-development"}, "iVAYOeGmNqo": {"duration": 466, "path": "khan/math/differential-calculus/derivative_applications/differentiation-application/approximating-incremental-cost-with-derivative/", "keywords": "", "id": "iVAYOeGmNqo", "title": "Approximating incremental cost with derivative", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iVAYOeGmNqo.mp4/iVAYOeGmNqo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iVAYOeGmNqo.mp4/iVAYOeGmNqo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iVAYOeGmNqo.m3u8/iVAYOeGmNqo.m3u8"}, "slug": "approximating-incremental-cost-with-derivative", "video_id": "iVAYOeGmNqo", "youtube_id": "iVAYOeGmNqo", "readable_id": "approximating-incremental-cost-with-derivative"}, "w6O2Rxub6VE": {"duration": 497, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/r-greater-than-g/", "keywords": "", "id": "w6O2Rxub6VE", "title": "r greater than g but less inequality", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w6O2Rxub6VE.mp4/w6O2Rxub6VE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w6O2Rxub6VE.mp4/w6O2Rxub6VE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w6O2Rxub6VE.m3u8/w6O2Rxub6VE.m3u8"}, "slug": "r-greater-than-g", "video_id": "w6O2Rxub6VE", "youtube_id": "w6O2Rxub6VE", "readable_id": "r-greater-than-g"}, "oc9fJCAIRJs": {"duration": 494, "path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/hardy-weinberg/", "keywords": "", "id": "oc9fJCAIRJs", "title": "Hardy Weinberg equation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oc9fJCAIRJs.mp4/oc9fJCAIRJs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oc9fJCAIRJs.mp4/oc9fJCAIRJs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oc9fJCAIRJs.m3u8/oc9fJCAIRJs.m3u8"}, "slug": "hardy-weinberg", "video_id": "oc9fJCAIRJs", "youtube_id": "oc9fJCAIRJs", "readable_id": "hardy-weinberg"}, "XhYQYVQq6K0": {"duration": 628, "path": "khan/science/health-and-medicine/healthcare-misc/precocious-puberty/", "keywords": "Precocious, Puberty", "id": "XhYQYVQq6K0", "title": "Precocious puberty", "description": "At Stanford Medical School with Morgan Theis talking to Dr. Laura Bachrach talking about precocious puberty", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XhYQYVQq6K0.mp4/XhYQYVQq6K0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XhYQYVQq6K0.mp4/XhYQYVQq6K0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XhYQYVQq6K0.m3u8/XhYQYVQq6K0.m3u8"}, "slug": "precocious-puberty", "video_id": "XhYQYVQq6K0", "youtube_id": "XhYQYVQq6K0", "readable_id": "precocious-puberty"}, "eu_GFuU7tLI": {"duration": 599, "path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/exact-equations-example-3/", "keywords": "exact, differential, equations", "id": "eu_GFuU7tLI", "title": "Exact equations example 3", "description": "One more exact equation example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eu_GFuU7tLI.mp4/eu_GFuU7tLI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eu_GFuU7tLI.mp4/eu_GFuU7tLI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eu_GFuU7tLI.m3u8/eu_GFuU7tLI.m3u8"}, "slug": "exact-equations-example-3", "video_id": "eu_GFuU7tLI", "youtube_id": "eu_GFuU7tLI", "readable_id": "exact-equations-example-3"}, "LvoONWiXJ5I": {"duration": 558, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/acute-treatment-of-stroke-with-medications/", "keywords": "", "id": "LvoONWiXJ5I", "title": "Acute treatment of stroke with medications", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LvoONWiXJ5I.mp4/LvoONWiXJ5I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LvoONWiXJ5I.mp4/LvoONWiXJ5I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LvoONWiXJ5I.m3u8/LvoONWiXJ5I.m3u8"}, "slug": "acute-treatment-of-stroke-with-medications", "video_id": "LvoONWiXJ5I", "youtube_id": "LvoONWiXJ5I", "readable_id": "acute-treatment-of-stroke-with-medications"}, "Zi4Fqc8Fkws": {"duration": 621, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/how-hiv-infects-us-cd4-t-helper-lymphocyte-infection/", "keywords": "T Helper Cell,HIV (Disease Cause),Lymphocyte (Anatomical Structure),CD4 (Protein),Infection (Disease Or Medical Condition)", "id": "Zi4Fqc8Fkws", "title": "How HIV infects us: CD4 (T-helper) lymphocyte infection", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zi4Fqc8Fkws.mp4/Zi4Fqc8Fkws.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zi4Fqc8Fkws.mp4/Zi4Fqc8Fkws.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zi4Fqc8Fkws.m3u8/Zi4Fqc8Fkws.m3u8"}, "slug": "how-hiv-infects-us-cd4-t-helper-lymphocyte-infection", "video_id": "Zi4Fqc8Fkws", "youtube_id": "Zi4Fqc8Fkws", "readable_id": "how-hiv-infects-us-cd4-t-helper-lymphocyte-infection"}, "aMIyUsF75Pw": {"duration": 323, "path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/evaluating-taylor-polynomial-of-derivative/", "keywords": "", "id": "aMIyUsF75Pw", "title": "Evaluating Taylor Polynomial of derivative", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aMIyUsF75Pw.mp4/aMIyUsF75Pw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aMIyUsF75Pw.mp4/aMIyUsF75Pw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aMIyUsF75Pw.m3u8/aMIyUsF75Pw.m3u8"}, "slug": "evaluating-taylor-polynomial-of-derivative", "video_id": "aMIyUsF75Pw", "youtube_id": "aMIyUsF75Pw", "readable_id": "evaluating-taylor-polynomial-of-derivative"}, "qtbb4YBJbJM": {"duration": 454, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-herpes/", "keywords": "", "id": "qtbb4YBJbJM", "title": "What is herpes?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qtbb4YBJbJM.mp4/qtbb4YBJbJM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qtbb4YBJbJM.mp4/qtbb4YBJbJM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qtbb4YBJbJM.m3u8/qtbb4YBJbJM.m3u8"}, "slug": "what-is-herpes", "video_id": "qtbb4YBJbJM", "youtube_id": "qtbb4YBJbJM", "readable_id": "what-is-herpes"}, "WMv8A9qg6jY": {"duration": 465, "path": "khan/test-prep/mcat/individuals-and-society/self-identity/overview-of-theories-of-development/", "keywords": "", "id": "WMv8A9qg6jY", "title": "Overview of theories of development", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WMv8A9qg6jY.mp4/WMv8A9qg6jY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WMv8A9qg6jY.mp4/WMv8A9qg6jY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WMv8A9qg6jY.m3u8/WMv8A9qg6jY.m3u8"}, "slug": "overview-of-theories-of-development", "video_id": "WMv8A9qg6jY", "youtube_id": "WMv8A9qg6jY", "readable_id": "overview-of-theories-of-development"}, "9XZypM2Z3Ro": {"duration": 298, "path": "khan/math/early-math/cc-early-math-counting-topic/cc-early-math-numbers-120/number-grid/", "keywords": "", "id": "9XZypM2Z3Ro", "title": "Number grid", "description": "In our introductory video to counting, Sal goes through all the numbers from 0 to 100, so we can start to see some interesting patterns.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9XZypM2Z3Ro.mp4/9XZypM2Z3Ro.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9XZypM2Z3Ro.mp4/9XZypM2Z3Ro.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9XZypM2Z3Ro.m3u8/9XZypM2Z3Ro.m3u8"}, "slug": "number-grid", "video_id": "9XZypM2Z3Ro", "youtube_id": "9XZypM2Z3Ro", "readable_id": "number-grid"}, "jQ2nD8ZGeEw": {"duration": 655, "path": "khan/science/physics/electricity-magnetism/magnets-magnetic/magnetism-5/", "keywords": "magnetic, force, current, field", "id": "jQ2nD8ZGeEw", "title": "Magnetic force on a current carrying wire", "description": "Sal derives the formula F=ILB to determine the force on a current carrying wire.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jQ2nD8ZGeEw.mp4/jQ2nD8ZGeEw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jQ2nD8ZGeEw.mp4/jQ2nD8ZGeEw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jQ2nD8ZGeEw.m3u8/jQ2nD8ZGeEw.m3u8"}, "slug": "magnetism-5", "video_id": "jQ2nD8ZGeEw", "youtube_id": "jQ2nD8ZGeEw", "readable_id": "magnetism-5"}, "hrBMFNvvOBI": {"duration": 254, "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/correggio-jupiter-and-io/", "keywords": "Correggio, Zeus, Jupiter, Io, Ganymede, Metamorphoses, Ovid, Mythology, myth, love, Gonzaga, Federico II, Mantua, Charles V, Italy, Parma, Italian, Renaissance, painting, Leda, Swan, Danae", "id": "hrBMFNvvOBI", "title": "Correggio, Jupiter and Io", "description": "Correggio, Jupiter and Io, 1532-33, oil on canvas 163.5 x 70.5 cm (Kunsthistorisches Museum, Vienna)\u00a0Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\u00a0\n\nJupiter and Io\u00a0and the other canvases by Correggio discussed in the video,\u00a0The Rape\u00a0(Abduction)of Ganymede,\u00a0Dan\u00e4e, and\u00a0Leda and the Swan\u00a0illustrate stories from the poem\u00a0Metamorphoses\u00a0by the Roman poet Ovid. Metamorphoses is, of course about transformation, such as Jupiter becoming a swan, but it is also about love and is one of the most influential texts ever written. Below is a translated excerpt:\n\nOvid's Metamorphoses: Book I, lines 587-600\u00a0\n\nJupiter first saw her returning from her father\u2019s stream, and said \u2018Virgin, worthy of Jupiter himself, who will make some unknown man happy when you share his bed, while it is hot and the sun is at the highest point of its arc, find shade in the deep woods! (and he showed her the woods\u2019 shade). But if you are afraid to enter the wild beasts\u2019 lairs, you can go into the remote woods in safety, protected by a god, and not by any lesser god, but by the one who holds the sceptre of heaven in his mighty hand, and who hurls the flickering bolts of lightning. Do not fly from me!\u2019 She was already in flight. She had left behind Lerna\u2019s pastures, and the Lyrcean plain\u2019s wooded fields, when the god hid the wide earth in a covering of fog, caught the fleeing girl, and raped her.\u00a0\n\nUniversity of Virginia etext, translation from the Latin by Anthony S. Kline, CC BY-NC\n\nPlease note, while the video relates the most broadly accepted understanding of the provenance of the painting\u00a0Jupiter and Io, little is certain, and competing theories do exist.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hrBMFNvvOBI.mp4/hrBMFNvvOBI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hrBMFNvvOBI.mp4/hrBMFNvvOBI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hrBMFNvvOBI.m3u8/hrBMFNvvOBI.m3u8"}, "slug": "correggio-jupiter-and-io", "video_id": "hrBMFNvvOBI", "youtube_id": "hrBMFNvvOBI", "readable_id": "correggio-jupiter-and-io"}, "VpVwgQjjaO4": {"duration": 247, "path": "khan/humanities/art-asia/southeast-asia/bali/boar-barong/", "keywords": "", "id": "VpVwgQjjaO4", "title": "Balinese boar Barong dance performance", "description": "The Barong is a protective deity that can take on a variety of animal forms\u2014lions, tigers, and boars are some of the more common images\u2014and each one is addressed using a respectful title such as Great God or Great Lord. Many villages, especially in southern Bali, have their own Barong figure. The Barong mask is kept in a shrine within a temple and brought out for use. The Barong is one of the most prominent images seen in the performing arts of Bali. This video features the Calonarang, a dance drama intended to chase away evil and purify a village.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VpVwgQjjaO4.mp4/VpVwgQjjaO4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VpVwgQjjaO4.mp4/VpVwgQjjaO4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VpVwgQjjaO4.m3u8/VpVwgQjjaO4.m3u8"}, "slug": "boar-barong", "video_id": "VpVwgQjjaO4", "youtube_id": "VpVwgQjjaO4", "readable_id": "boar-barong"}, "_Vxg6bsNgYU": {"duration": 683, "path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/crash-course-world-history-29/", "keywords": "crash course", "id": "_Vxg6bsNgYU", "title": "The French Revolution", "description": "In which John Green examines the French Revolution, and gets into how and why it differed from the American Revolution. Was it the serial authoritarian regimes? The guillotine? The Reign of Terror? All of this and more contributed to the French Revolution not being quite as revolutionary as it could have been. France endured multiple constitutions, the heads of heads of state literally rolled, and then they ended up with a megalomaniacal little emperor by the name of Napoleon. But how did all of this change the world, and how did it lead to other, more successful revolutions around the world? Watch this video and find out. Spoiler alert: Marie Antoinette never said, \"Let them eat cake.\" Sorry.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_Vxg6bsNgYU.mp4/_Vxg6bsNgYU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_Vxg6bsNgYU.mp4/_Vxg6bsNgYU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_Vxg6bsNgYU.m3u8/_Vxg6bsNgYU.m3u8"}, "slug": "crash-course-world-history-29", "video_id": "_Vxg6bsNgYU", "youtube_id": "_Vxg6bsNgYU", "readable_id": "crash-course-world-history-29"}, "Z30Kkrye47Y": {"duration": 73, "path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/ss-extracurriculars-that-are-leadership-opportunities/", "keywords": "", "id": "Z30Kkrye47Y", "title": "Student story: Extracurriculars that are leadership opportunities", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z30Kkrye47Y.mp4/Z30Kkrye47Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z30Kkrye47Y.mp4/Z30Kkrye47Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z30Kkrye47Y.m3u8/Z30Kkrye47Y.m3u8"}, "slug": "ss-extracurriculars-that-are-leadership-opportunities", "video_id": "Z30Kkrye47Y", "youtube_id": "Z30Kkrye47Y", "readable_id": "ss-extracurriculars-that-are-leadership-opportunities"}, "qfQv8GzyjB4": {"duration": 412, "path": "khan/math/pre-algebra/fractions-pre-alg/number-sets-pre-alg/number-sets-2/", "keywords": "U12_L1_T1_we2, Number, Sets, CC_6_NS_6, CC_6_NS_6_c", "id": "qfQv8GzyjB4", "title": "Number sets 2", "description": "Number Sets 2", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qfQv8GzyjB4.mp4/qfQv8GzyjB4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qfQv8GzyjB4.mp4/qfQv8GzyjB4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qfQv8GzyjB4.m3u8/qfQv8GzyjB4.m3u8"}, "slug": "number-sets-2", "video_id": "qfQv8GzyjB4", "youtube_id": "qfQv8GzyjB4", "readable_id": "number-sets-2"}, "bFtjG45-Udk": {"duration": 636, "path": "khan/math/algebra2/arithmetic-with-polynomials/multiplying-polynomials-review/special-products-of-binomials/", "keywords": "Special, Products, of, Binomials, CC_39336_A-APR_5", "id": "bFtjG45-Udk", "title": "Introduction to special products of binomials", "description": "Sal gives numerous examples of the two special product forms: perfect squares and the difference of two squares.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bFtjG45-Udk.mp4/bFtjG45-Udk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bFtjG45-Udk.mp4/bFtjG45-Udk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bFtjG45-Udk.m3u8/bFtjG45-Udk.m3u8"}, "slug": "special-products-of-binomials", "video_id": "bFtjG45-Udk", "youtube_id": "bFtjG45-Udk", "readable_id": "special-products-of-binomials"}, "C_HcAE8IUqQ": {"duration": 165, "path": "khan/partner-content/pixar/sets/sets1/sets-2/", "keywords": "", "id": "C_HcAE8IUqQ", "title": "2. Translation", "description": "Now we can begin laying out our scene! Starting with translation...", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C_HcAE8IUqQ.mp4/C_HcAE8IUqQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C_HcAE8IUqQ.mp4/C_HcAE8IUqQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C_HcAE8IUqQ.m3u8/C_HcAE8IUqQ.m3u8"}, "slug": "sets-2", "video_id": "C_HcAE8IUqQ", "youtube_id": "C_HcAE8IUqQ", "readable_id": "sets-2"}, "XS8OhYdc-20": {"duration": 242, "path": "khan/humanities/becoming-modern/avant-garde-france/realism/manet-the-balcony-1868-69/", "keywords": "Manet, Balcony, Smarthistory, Art History, Musee d'Orsay", "id": "XS8OhYdc-20", "title": "Manet, The Balcony", "description": "\u00c9douard Manet, The Balcony, 1868-69, oil on canvas, 66-1/2 x 44-1/4 inches (Mus\u00e9e d'Orsay, Paris)\n\nSpeakers: Drs. Beth Harris and Steven Zucker\n\nhttp://www.smarthistory.org/manets-the-balcony.html\n\nThe three principal figures depicted are each a friend of the artist. From left to right they are: the painters Berthe Morisot and Jean Baptiste Antoine Guillemet, and Fanny Claus, a violinist. Some have suggested that the fourth figure, barely visible in the shadows, is the young Leon Leenhoff, the son of Manet's wife.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XS8OhYdc-20.mp4/XS8OhYdc-20.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XS8OhYdc-20.mp4/XS8OhYdc-20.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XS8OhYdc-20.m3u8/XS8OhYdc-20.m3u8"}, "slug": "manet-the-balcony-1868-69", "video_id": "XS8OhYdc-20", "youtube_id": "XS8OhYdc-20", "readable_id": "manet-the-balcony-1868-69"}, "6vDwG_rz_PU": {"duration": 510, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/malaria-rn/treatment-of-malaria/", "keywords": "Malaria (Disease Or Medical Condition),Medicine (Field Of Study),Health (Industry)", "id": "6vDwG_rz_PU", "title": "Treatment of malaria", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6vDwG_rz_PU.mp4/6vDwG_rz_PU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6vDwG_rz_PU.mp4/6vDwG_rz_PU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6vDwG_rz_PU.m3u8/6vDwG_rz_PU.m3u8"}, "slug": "treatment-of-malaria", "video_id": "6vDwG_rz_PU", "youtube_id": "6vDwG_rz_PU", "readable_id": "treatment-of-malaria"}, "TlvXGblFsv8": {"duration": 210, "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-spain/goya-the-family-of-charles-iv-c-1800/", "keywords": "Goya, Royal Family, Charles IV, Prado, Madrid, Art History, Smarthistory", "id": "TlvXGblFsv8", "title": "Goya, The Family of Charles IV", "description": "Francisco Goya, The Family of Charles IV, c. 1800, Prado Museum, 280 cm x 336 cm (Museo Nacional del Prado, Madrid) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TlvXGblFsv8.mp4/TlvXGblFsv8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TlvXGblFsv8.mp4/TlvXGblFsv8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TlvXGblFsv8.m3u8/TlvXGblFsv8.m3u8"}, "slug": "goya-the-family-of-charles-iv-c-1800", "video_id": "TlvXGblFsv8", "youtube_id": "TlvXGblFsv8", "readable_id": "goya-the-family-of-charles-iv-c-1800"}, "xQ9D4Jz95-A": {"duration": 570, "path": "khan/science/chemistry/chem-kinetics/arrhenius-equation/maxwell-boltzmann-distribution/", "keywords": "education,online learning,learning,lessons,Maxwell-boltzmann,maxwell speed distribution", "id": "xQ9D4Jz95-A", "title": "Maxwell Boltzmann distribution", "description": "Using the Maxwell-Boltzmann distribution to visualize the distribution of speeds of particles at different temperatures.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xQ9D4Jz95-A.mp4/xQ9D4Jz95-A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xQ9D4Jz95-A.mp4/xQ9D4Jz95-A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xQ9D4Jz95-A.m3u8/xQ9D4Jz95-A.m3u8"}, "slug": "maxwell-boltzmann-distribution", "video_id": "xQ9D4Jz95-A", "youtube_id": "xQ9D4Jz95-A", "readable_id": "maxwell-boltzmann-distribution"}, "kOf8fU9iduA": {"duration": 347, "path": "khan/humanities/history/euro-hist/ww1-aftermath/deaths-in-world-war-i/", "keywords": "", "id": "kOf8fU9iduA", "title": "Deaths in World War I", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kOf8fU9iduA.mp4/kOf8fU9iduA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kOf8fU9iduA.mp4/kOf8fU9iduA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kOf8fU9iduA.m3u8/kOf8fU9iduA.m3u8"}, "slug": "deaths-in-world-war-i", "video_id": "kOf8fU9iduA", "youtube_id": "kOf8fU9iduA", "readable_id": "deaths-in-world-war-i"}, "Z3db5itCIiQ": {"duration": 298, "path": "khan/math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions/rationalizing-denominators-of-expressions/", "keywords": "u16_l2_t4_we1, Rationalizing, Denominators, of, Expressions", "id": "Z3db5itCIiQ", "title": "How to rationalize a radical denominator in a variable expression (example)", "description": "Sal shows how to rationalize the denominator of the expression (16+2x^2)/(\u221a8).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z3db5itCIiQ.mp4/Z3db5itCIiQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z3db5itCIiQ.mp4/Z3db5itCIiQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z3db5itCIiQ.m3u8/Z3db5itCIiQ.m3u8"}, "slug": "rationalizing-denominators-of-expressions", "video_id": "Z3db5itCIiQ", "youtube_id": "Z3db5itCIiQ", "readable_id": "rationalizing-denominators-of-expressions"}, "GQBRWjHdir0": {"duration": 431, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/gilded-age-silicon-valley/", "keywords": "", "id": "GQBRWjHdir0", "title": "Gilded Age versus Silicon Valley", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GQBRWjHdir0.mp4/GQBRWjHdir0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GQBRWjHdir0.mp4/GQBRWjHdir0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GQBRWjHdir0.m3u8/GQBRWjHdir0.m3u8"}, "slug": "gilded-age-silicon-valley", "video_id": "GQBRWjHdir0", "youtube_id": "GQBRWjHdir0", "readable_id": "gilded-age-silicon-valley"}, "LPYTndFFTko": {"duration": 278, "path": "khan/test-prep/mcat/society-and-culture/social-structures/conflict-theory/", "keywords": "conflict theory", "id": "LPYTndFFTko", "title": "Conflict theory", "description": "Conflict theory observes how the unrest in a society will cause it to change and evolve to relieve the tension. By Sydney Brown.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LPYTndFFTko.mp4/LPYTndFFTko.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LPYTndFFTko.mp4/LPYTndFFTko.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LPYTndFFTko.m3u8/LPYTndFFTko.m3u8"}, "slug": "conflict-theory", "video_id": "LPYTndFFTko", "youtube_id": "LPYTndFFTko", "readable_id": "conflict-theory"}, "WZgYhVgWR8g": {"duration": 230, "path": "khan/test-prep/ap-art-history/west-and-central-asia/unesco-siq-project/", "keywords": "", "id": "WZgYhVgWR8g", "title": "Petra: UNESCO Siq Project", "description": "The Siq is one of Petra\u2019s most endangered areas, in which natural environmental risks pose a major threat to the cultural heritage and the visitors. Thus, systematic identification and monitoring of its potentially unstable areas is needed. The Jordanian government made a request in 2011 for assistance in this regard, and subsequently a rapid assessment of the Siq was carried out by UNESCO to identify the unstable blocks and map risk zones in the Siq. Read more here.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WZgYhVgWR8g.mp4/WZgYhVgWR8g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WZgYhVgWR8g.mp4/WZgYhVgWR8g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WZgYhVgWR8g.m3u8/WZgYhVgWR8g.m3u8"}, "slug": "unesco-siq-project", "video_id": "WZgYhVgWR8g", "youtube_id": "WZgYhVgWR8g", "readable_id": "unesco-siq-project"}, "FGq9-R6Yw18": {"duration": 644, "path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/formation-of-hemiacetals/", "keywords": "", "id": "FGq9-R6Yw18", "title": "Formation of hemiacetals", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FGq9-R6Yw18.mp4/FGq9-R6Yw18.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FGq9-R6Yw18.mp4/FGq9-R6Yw18.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FGq9-R6Yw18.m3u8/FGq9-R6Yw18.m3u8"}, "slug": "formation-of-hemiacetals", "video_id": "FGq9-R6Yw18", "youtube_id": "FGq9-R6Yw18", "readable_id": "formation-of-hemiacetals"}, "dFFzAP2OZ3E": {"duration": 536, "path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/more-on-entropy/", "keywords": "thermodynamics, carnot, entropy", "id": "dFFzAP2OZ3E", "title": "More on entropy", "description": "More clarification as to what entropy is and what entropy is not.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dFFzAP2OZ3E.mp4/dFFzAP2OZ3E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dFFzAP2OZ3E.mp4/dFFzAP2OZ3E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dFFzAP2OZ3E.m3u8/dFFzAP2OZ3E.m3u8"}, "slug": "more-on-entropy", "video_id": "dFFzAP2OZ3E", "youtube_id": "dFFzAP2OZ3E", "readable_id": "more-on-entropy"}, "3NcIK0s3IwU": {"duration": 427, "path": "khan/test-prep/mcat/physical-processes/current-and-resistance/circuits-part-4/", "keywords": "resistance, circuit", "id": "3NcIK0s3IwU", "title": "Example: Analyzing a more complex resistor circuit", "description": "A hairy resistance problem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3NcIK0s3IwU.mp4/3NcIK0s3IwU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3NcIK0s3IwU.mp4/3NcIK0s3IwU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3NcIK0s3IwU.m3u8/3NcIK0s3IwU.m3u8"}, "slug": "circuits-part-4", "video_id": "3NcIK0s3IwU", "youtube_id": "3NcIK0s3IwU", "readable_id": "circuits-part-4"}, "L5OkFR8GScU": {"duration": 289, "path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/pair-of-centaurs-fighting-cats-of-prey-from-hadrian-s-villa-c-130-b-c-e-1/", "keywords": "", "id": "L5OkFR8GScU", "title": "Pair of Centaurs Fighting Cats of Prey from Hadrian's Villa, Tivoli", "description": "Pair of Centaurs Fighting Cats of Prey from Hadrian's Villa, mosaic, c. 130 C.E. (Altes Museum, Berlin) Speakers: Dr. Beth Harris, Dr. Steven Zucker See this on Smarthistory: http://smarthistory.khanacademy.org/pair-of-centaurs-fighting-cats-of-prey-from-hadrians-villa.html View this mosaic up close in the Google Art Project", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L5OkFR8GScU.mp4/L5OkFR8GScU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L5OkFR8GScU.mp4/L5OkFR8GScU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L5OkFR8GScU.m3u8/L5OkFR8GScU.m3u8"}, "slug": "pair-of-centaurs-fighting-cats-of-prey-from-hadrian-s-villa-c-130-b-c-e-1", "video_id": "L5OkFR8GScU", "youtube_id": "L5OkFR8GScU", "readable_id": "pair-of-centaurs-fighting-cats-of-prey-from-hadrian-s-villa-c-130-b-c-e-1"}, "LrTn4cvsewk": {"duration": 167, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/axis-of-symmetry/", "keywords": "", "id": "LrTn4cvsewk", "title": "Introduction to reflective symmetry", "description": "Sal introduces the concept of an \"axis of symmetry.\"", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LrTn4cvsewk.mp4/LrTn4cvsewk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LrTn4cvsewk.mp4/LrTn4cvsewk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LrTn4cvsewk.m3u8/LrTn4cvsewk.m3u8"}, "slug": "axis-of-symmetry", "video_id": "LrTn4cvsewk", "youtube_id": "LrTn4cvsewk", "readable_id": "axis-of-symmetry"}, "vAlazPPFlyY": {"duration": 283, "path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/vertical-adjacent-and-linearly-paired-angles/", "keywords": "", "id": "vAlazPPFlyY", "title": "Vertical, adjacent and linearly paired angles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vAlazPPFlyY.mp4/vAlazPPFlyY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vAlazPPFlyY.mp4/vAlazPPFlyY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vAlazPPFlyY.m3u8/vAlazPPFlyY.m3u8"}, "slug": "vertical-adjacent-and-linearly-paired-angles", "video_id": "vAlazPPFlyY", "youtube_id": "vAlazPPFlyY", "readable_id": "vertical-adjacent-and-linearly-paired-angles"}, "xE43JrjCpjE": {"duration": 287, "path": "khan/economics-finance-domain/core-finance/derivative-securities/interest-rate-swaps-tut/interest-rate-swap-2/", "keywords": "Interest, Rate, Swap, 2", "id": "xE43JrjCpjE", "title": "Interest rate swap 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xE43JrjCpjE.mp4/xE43JrjCpjE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xE43JrjCpjE.mp4/xE43JrjCpjE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xE43JrjCpjE.m3u8/xE43JrjCpjE.m3u8"}, "slug": "interest-rate-swap-2", "video_id": "xE43JrjCpjE", "youtube_id": "xE43JrjCpjE", "readable_id": "interest-rate-swap-2"}, "2cz2tH5vE1Q": {"duration": 263, "path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/why-do-some-people-but-not-others-develop-substance-use-problems/", "keywords": "Substance Abuse (Disease Or Medical Condition),Health (Industry)", "id": "2cz2tH5vE1Q", "title": "Why do some people but not others develop substance use problems?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2cz2tH5vE1Q.mp4/2cz2tH5vE1Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2cz2tH5vE1Q.mp4/2cz2tH5vE1Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2cz2tH5vE1Q.m3u8/2cz2tH5vE1Q.m3u8"}, "slug": "why-do-some-people-but-not-others-develop-substance-use-problems", "video_id": "2cz2tH5vE1Q", "youtube_id": "2cz2tH5vE1Q", "readable_id": "why-do-some-people-but-not-others-develop-substance-use-problems"}, "S3z4XqC_YSc": {"duration": 501, "path": "khan/math/arithmetic/multiplication-division/lattice_multiplication/why-lattice-multiplication-works/", "keywords": "lattice, multiplication, CC_3_OA_5, CC_3_OA_7, CC_4_NBT_5", "id": "S3z4XqC_YSc", "title": "Why lattice multiplication works", "description": "Understanding why lattice multiplication works", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S3z4XqC_YSc.mp4/S3z4XqC_YSc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S3z4XqC_YSc.mp4/S3z4XqC_YSc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S3z4XqC_YSc.m3u8/S3z4XqC_YSc.m3u8"}, "slug": "why-lattice-multiplication-works", "video_id": "S3z4XqC_YSc", "youtube_id": "S3z4XqC_YSc", "readable_id": "why-lattice-multiplication-works"}, "oIV1zM8qlpk": {"duration": 248, "path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/proof-opposite-angles-of-parallelogram-congruent/", "keywords": "geometry", "id": "oIV1zM8qlpk", "title": "Proof: Opposite angles of parallelogram are congruent", "description": "Sal proves that opposite angles of a parallelogram are congruent.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oIV1zM8qlpk.mp4/oIV1zM8qlpk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oIV1zM8qlpk.mp4/oIV1zM8qlpk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oIV1zM8qlpk.m3u8/oIV1zM8qlpk.m3u8"}, "slug": "proof-opposite-angles-of-parallelogram-congruent", "video_id": "oIV1zM8qlpk", "youtube_id": "oIV1zM8qlpk", "readable_id": "proof-opposite-angles-of-parallelogram-congruent"}, "4Xgk3vusxT8": {"duration": 455, "path": "khan/test-prep/mcat/physical-processes/sound/when-the-source-and-the-wave-move-at-the-same-velocity/", "keywords": "sonic, boom, doppler, source, wave", "id": "4Xgk3vusxT8", "title": "When the source and the wave move at the same velocity", "description": "When the source and the wave move at the same velocity", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4Xgk3vusxT8.mp4/4Xgk3vusxT8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4Xgk3vusxT8.mp4/4Xgk3vusxT8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4Xgk3vusxT8.m3u8/4Xgk3vusxT8.m3u8"}, "slug": "when-the-source-and-the-wave-move-at-the-same-velocity", "video_id": "4Xgk3vusxT8", "youtube_id": "4Xgk3vusxT8", "readable_id": "when-the-source-and-the-wave-move-at-the-same-velocity"}, "ivbT-wvzK58": {"duration": 460, "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments/viola-interview-and-demonstration-with-principal-rebecca-young/", "keywords": "", "id": "ivbT-wvzK58", "title": "Viola: Interview and demonstration with principal Rebecca Young", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ivbT-wvzK58.mp4/ivbT-wvzK58.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ivbT-wvzK58.mp4/ivbT-wvzK58.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ivbT-wvzK58.m3u8/ivbT-wvzK58.m3u8"}, "slug": "viola-interview-and-demonstration-with-principal-rebecca-young", "video_id": "ivbT-wvzK58", "youtube_id": "ivbT-wvzK58", "readable_id": "viola-interview-and-demonstration-with-principal-rebecca-young"}, "abq95BTwOGo": {"duration": 599, "path": "khan/computing/computer-science/informationtheory/info-theory/morse-code-the-information-age-language-of-coins-8-12/", "keywords": "morse code", "id": "abq95BTwOGo", "title": "Morse code and the information age", "description": "Electric Telegraphs and developments leading to Morse Code.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/abq95BTwOGo.mp4/abq95BTwOGo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/abq95BTwOGo.mp4/abq95BTwOGo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/abq95BTwOGo.m3u8/abq95BTwOGo.m3u8"}, "slug": "morse-code-the-information-age-language-of-coins-8-12", "video_id": "abq95BTwOGo", "youtube_id": "abq95BTwOGo", "readable_id": "morse-code-the-information-age-language-of-coins-8-12"}, "bhrmEy0wvD0": {"duration": 242, "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex3-part-4-home-stretch/", "keywords": "vector, calculus, multivariable", "id": "bhrmEy0wvD0", "title": "Surface integral ex3 part 4: Home stretch", "description": "Evaluating the third surface integral and coming to the final answer", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bhrmEy0wvD0.mp4/bhrmEy0wvD0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bhrmEy0wvD0.mp4/bhrmEy0wvD0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bhrmEy0wvD0.m3u8/bhrmEy0wvD0.m3u8"}, "slug": "surface-integral-ex3-part-4-home-stretch", "video_id": "bhrmEy0wvD0", "youtube_id": "bhrmEy0wvD0", "readable_id": "surface-integral-ex3-part-4-home-stretch"}, "pdleRJd9YNY": {"duration": 248, "path": "khan/math/early-math/cc-early-math-measure-data-topic/cc-early-math-length-word-problems/basic-measurement/", "keywords": "", "id": "pdleRJd9YNY", "title": "Measuring a golden statue", "description": "Measure an object with same-size length units that span it with no gaps or overlaps.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pdleRJd9YNY.mp4/pdleRJd9YNY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pdleRJd9YNY.mp4/pdleRJd9YNY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pdleRJd9YNY.m3u8/pdleRJd9YNY.m3u8"}, "slug": "basic-measurement", "video_id": "pdleRJd9YNY", "youtube_id": "pdleRJd9YNY", "readable_id": "basic-measurement"}, "ZqWB25yUWnc": {"duration": 519, "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/non-movement-symptoms-of-parkinsons-disease/", "keywords": "", "id": "ZqWB25yUWnc", "title": "Non-movement symptoms of Parkinson's disease", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZqWB25yUWnc.mp4/ZqWB25yUWnc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZqWB25yUWnc.mp4/ZqWB25yUWnc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZqWB25yUWnc.m3u8/ZqWB25yUWnc.m3u8"}, "slug": "non-movement-symptoms-of-parkinsons-disease", "video_id": "ZqWB25yUWnc", "youtube_id": "ZqWB25yUWnc", "readable_id": "non-movement-symptoms-of-parkinsons-disease"}, "IHgoDWM9hAc": {"duration": 371, "path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/diagnosing-depression-2/", "keywords": "Depression (Symptom),Diagnosis (Literature Subject),Health (Industry)", "id": "IHgoDWM9hAc", "title": "Diagnosing depression", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IHgoDWM9hAc.mp4/IHgoDWM9hAc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IHgoDWM9hAc.mp4/IHgoDWM9hAc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IHgoDWM9hAc.m3u8/IHgoDWM9hAc.m3u8"}, "slug": "diagnosing-depression-2", "video_id": "IHgoDWM9hAc", "youtube_id": "IHgoDWM9hAc", "readable_id": "diagnosing-depression-2"}, "3quWEMobksw": {"duration": 187, "path": "khan/science/discoveries-projects/lego-robotics/lego-intro/introduction-to-environment/", "keywords": "", "id": "3quWEMobksw", "title": "Introduction to programming", "description": "Get to know the NXT-G environment", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3quWEMobksw.mp4/3quWEMobksw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3quWEMobksw.mp4/3quWEMobksw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3quWEMobksw.m3u8/3quWEMobksw.m3u8"}, "slug": "introduction-to-environment", "video_id": "3quWEMobksw", "youtube_id": "3quWEMobksw", "readable_id": "introduction-to-environment"}, "OrRDNKNHtlg": {"duration": 207, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/option-expiration-and-price/", "keywords": "Option, Expiration, and, Price", "id": "OrRDNKNHtlg", "title": "Option expiration and price", "description": "Option Expiration and Price", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OrRDNKNHtlg.mp4/OrRDNKNHtlg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OrRDNKNHtlg.mp4/OrRDNKNHtlg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OrRDNKNHtlg.m3u8/OrRDNKNHtlg.m3u8"}, "slug": "option-expiration-and-price", "video_id": "OrRDNKNHtlg", "youtube_id": "OrRDNKNHtlg", "readable_id": "option-expiration-and-price"}, "4oeoIOan_h4": {"duration": 545, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/old-school-equations/more-percent-problems/", "keywords": "Percent, math, algebra, CC_7_RP_3", "id": "4oeoIOan_h4", "title": "More percent problems", "description": "Slightly harder percent problems", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4oeoIOan_h4.mp4/4oeoIOan_h4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4oeoIOan_h4.mp4/4oeoIOan_h4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4oeoIOan_h4.m3u8/4oeoIOan_h4.m3u8"}, "slug": "more-percent-problems", "video_id": "4oeoIOan_h4", "youtube_id": "4oeoIOan_h4", "readable_id": "more-percent-problems"}, "6phoVfGKKec": {"duration": 252, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/algebra-foundations-scientific-notation/scientific-notation-i/", "keywords": "u11_l1_t4_we1, Scientific, Notation", "id": "6phoVfGKKec", "title": "Express a small number in scientific notation (example)", "description": "Can you imagine if you had to do calculations with very, very small numbers? How would you handle all those zeros to the right of the decimal? Thank goodness for scientific notation!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6phoVfGKKec.mp4/6phoVfGKKec.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6phoVfGKKec.mp4/6phoVfGKKec.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6phoVfGKKec.m3u8/6phoVfGKKec.m3u8"}, "slug": "scientific-notation-i", "video_id": "6phoVfGKKec", "youtube_id": "6phoVfGKKec", "readable_id": "scientific-notation-i"}, "Oh_Pt_UrtEE": {"duration": 321, "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/meet-the-gastrointestinal-tract/", "keywords": "mcat", "id": "Oh_Pt_UrtEE", "title": "Meet the gastrointestinal tract!", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Oh_Pt_UrtEE.mp4/Oh_Pt_UrtEE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Oh_Pt_UrtEE.mp4/Oh_Pt_UrtEE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Oh_Pt_UrtEE.m3u8/Oh_Pt_UrtEE.m3u8"}, "slug": "meet-the-gastrointestinal-tract", "video_id": "Oh_Pt_UrtEE", "youtube_id": "Oh_Pt_UrtEE", "readable_id": "meet-the-gastrointestinal-tract"}, "AqvaQfbAC64": {"duration": 291, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/joseph-horowitz-on-dvorak-minilecture/", "keywords": "", "id": "AqvaQfbAC64", "title": "Anton\u00edn Dvo\u0159\u00e1k: Symphony No. 9 \"From the New World\" From the New World,\" a commentary by Joseph Horowitz", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AqvaQfbAC64.mp4/AqvaQfbAC64.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AqvaQfbAC64.mp4/AqvaQfbAC64.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AqvaQfbAC64.m3u8/AqvaQfbAC64.m3u8"}, "slug": "joseph-horowitz-on-dvorak-minilecture", "video_id": "AqvaQfbAC64", "youtube_id": "AqvaQfbAC64", "readable_id": "joseph-horowitz-on-dvorak-minilecture"}, "b9XDyXiJD7U": {"duration": 215, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ta-mccann/kauffman-ta-mccann2/", "keywords": "", "id": "b9XDyXiJD7U", "title": "T.A. McCann - Translating from ideas to execution", "description": "T.A. McCann, Founder and CEO of Gist, gives an overview of the company he founded and advocates planning ahead and deciding what you want to achieve. T.A. also describes the construct he uses to scrutinize his ideas.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/b9XDyXiJD7U.mp4/b9XDyXiJD7U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/b9XDyXiJD7U.mp4/b9XDyXiJD7U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/b9XDyXiJD7U.m3u8/b9XDyXiJD7U.m3u8"}, "slug": "kauffman-ta-mccann2", "video_id": "b9XDyXiJD7U", "youtube_id": "b9XDyXiJD7U", "readable_id": "kauffman-ta-mccann2"}, "P35LyN9g0oI": {"duration": 248, "path": "khan/math/geometry/transformations/transformations-symmetry/example-rotating-polygons/", "keywords": "", "id": "P35LyN9g0oI", "title": "Introduction to rotational symmetry", "description": "Sal checks whether various figure are symmetrical under a 180 degrees rotation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P35LyN9g0oI.mp4/P35LyN9g0oI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P35LyN9g0oI.mp4/P35LyN9g0oI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P35LyN9g0oI.m3u8/P35LyN9g0oI.m3u8"}, "slug": "example-rotating-polygons", "video_id": "P35LyN9g0oI", "youtube_id": "P35LyN9g0oI", "readable_id": "example-rotating-polygons"}, "dBVoIUASFS0": {"duration": 250, "path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/dialogue-for-2/", "keywords": "two, numbers, fractions, addition, vihart", "id": "dBVoIUASFS0", "title": "Dialogue for 2", "description": "A dialogue with the number 2, with special guest Brady Haran of Numberphile and other channels!\nhttp://www.youtube.com/user/numberphile\nhttp://www.youtube.com/user/periodicvideos\nhttp://www.youtube.com/user/sixtysymbols", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dBVoIUASFS0.mp4/dBVoIUASFS0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dBVoIUASFS0.mp4/dBVoIUASFS0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dBVoIUASFS0.m3u8/dBVoIUASFS0.m3u8"}, "slug": "dialogue-for-2", "video_id": "dBVoIUASFS0", "youtube_id": "dBVoIUASFS0", "readable_id": "dialogue-for-2"}, "acQYX4nwhCk": {"duration": 142, "path": "khan/test-prep/mcat/physical-processes/thin-lenses/object-image-height-and-distance-relationship/", "keywords": "Object, Image, Height, and, Distance, Relationship", "id": "acQYX4nwhCk", "title": "Object image height and distance relationship", "description": "Object Image Height and Distance Relationship", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/acQYX4nwhCk.mp4/acQYX4nwhCk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/acQYX4nwhCk.mp4/acQYX4nwhCk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/acQYX4nwhCk.m3u8/acQYX4nwhCk.m3u8"}, "slug": "object-image-height-and-distance-relationship", "video_id": "acQYX4nwhCk", "youtube_id": "acQYX4nwhCk", "readable_id": "object-image-height-and-distance-relationship"}, "Pk4d9lY48GI": {"duration": 594, "path": "khan/science/biology/macromolecules/proteins-and-amino-acids/introduction-to-amino-acids/", "keywords": "education,online learning,learning,lessons,zwitterions,amino acid,protien,peptide,central dogma of molecular biology", "id": "Pk4d9lY48GI", "title": "Introduction to amino acids", "description": "Understanding amino acids and their role in the Central Dogma of Molecular Biology (how the information in DNA eventually gets expressed as chains of amino acids). Thinking about the amino and carboxyl groups and how amino acids are typically found as zwitterions at physiological pH. How amino acid side chains can impact protein structure.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Pk4d9lY48GI.mp4/Pk4d9lY48GI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Pk4d9lY48GI.mp4/Pk4d9lY48GI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Pk4d9lY48GI.m3u8/Pk4d9lY48GI.m3u8"}, "slug": "introduction-to-amino-acids", "video_id": "Pk4d9lY48GI", "youtube_id": "Pk4d9lY48GI", "readable_id": "introduction-to-amino-acids"}, "cPOjnyjii-4": {"duration": 639, "path": "khan/math/differential-calculus/derivative_applications/rates_of_change/speed-of-shadow-of-diving-bird/", "keywords": "", "id": "cPOjnyjii-4", "title": "Speed of shadow of diving bird", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cPOjnyjii-4.mp4/cPOjnyjii-4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cPOjnyjii-4.mp4/cPOjnyjii-4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cPOjnyjii-4.m3u8/cPOjnyjii-4.m3u8"}, "slug": "speed-of-shadow-of-diving-bird", "video_id": "cPOjnyjii-4", "youtube_id": "cPOjnyjii-4", "readable_id": "speed-of-shadow-of-diving-bird"}, "nxfWL0TR5H4": {"duration": 166, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/ligaments-tendons-and-joints/", "keywords": "", "id": "nxfWL0TR5H4", "title": "Ligaments, tendons, and joints", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nxfWL0TR5H4.mp4/nxfWL0TR5H4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nxfWL0TR5H4.mp4/nxfWL0TR5H4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nxfWL0TR5H4.m3u8/nxfWL0TR5H4.m3u8"}, "slug": "ligaments-tendons-and-joints", "video_id": "nxfWL0TR5H4", "youtube_id": "nxfWL0TR5H4", "readable_id": "ligaments-tendons-and-joints"}, "kdEQGfeC0SE": {"duration": 674, "path": "khan/math/differential-calculus/limits_topic/continuity-limits/limits-to-define-continuity/", "keywords": "", "id": "kdEQGfeC0SE", "title": "Limits to define continuity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kdEQGfeC0SE.mp4/kdEQGfeC0SE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kdEQGfeC0SE.mp4/kdEQGfeC0SE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kdEQGfeC0SE.m3u8/kdEQGfeC0SE.m3u8"}, "slug": "limits-to-define-continuity", "video_id": "kdEQGfeC0SE", "youtube_id": "kdEQGfeC0SE", "readable_id": "limits-to-define-continuity"}, "Yq9W6B7XnmU": {"duration": 222, "path": "khan/math/pre-algebra/fractions-pre-alg/mult-fracs-word-probs-pre-alg/multiplying-fractions-word-problem-2/", "keywords": "", "id": "Yq9W6B7XnmU", "title": "Multiplying fractions word problem: movie marathon", "description": "We want to do a movie marathon! Let's figure out how long our marathon will last if each movie length is represented as a mixed number.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Yq9W6B7XnmU.mp4/Yq9W6B7XnmU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Yq9W6B7XnmU.mp4/Yq9W6B7XnmU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Yq9W6B7XnmU.m3u8/Yq9W6B7XnmU.m3u8"}, "slug": "multiplying-fractions-word-problem-2", "video_id": "Yq9W6B7XnmU", "youtube_id": "Yq9W6B7XnmU", "readable_id": "multiplying-fractions-word-problem-2"}, "wPA2FrET_Ac": {"duration": 706, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-37/", "keywords": "gmat, data, sufficiency, math", "id": "wPA2FrET_Ac", "title": "GMAT: Data sufficiency 37", "description": "142-144, pg. 290", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wPA2FrET_Ac.mp4/wPA2FrET_Ac.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wPA2FrET_Ac.mp4/wPA2FrET_Ac.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wPA2FrET_Ac.m3u8/wPA2FrET_Ac.m3u8"}, "slug": "gmat-data-sufficiency-37", "video_id": "wPA2FrET_Ac", "youtube_id": "wPA2FrET_Ac", "readable_id": "gmat-data-sufficiency-37"}, "fwBqEfjCyL8": {"duration": 113, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s8-easier/", "keywords": "", "id": "fwBqEfjCyL8", "title": "Circle equations \u2014 Basic example", "description": "Watch Sal work through a basic Circle equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fwBqEfjCyL8.mp4/fwBqEfjCyL8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fwBqEfjCyL8.mp4/fwBqEfjCyL8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fwBqEfjCyL8.m3u8/fwBqEfjCyL8.m3u8"}, "slug": "sat-math-s8-easier", "video_id": "fwBqEfjCyL8", "youtube_id": "fwBqEfjCyL8", "readable_id": "sat-math-s8-easier"}, "QWaUCFccvPk": {"duration": 80, "path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-sept-25-2014/", "keywords": "", "id": "QWaUCFccvPk", "title": "A taste of mount sharp", "description": "NASA's Curiosity Mars rover has collected its first drill sample from the base of Mount Sharp. The scientific allure of the layered mountain inside a crater drew the team to choose this part Mars as its landing site.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QWaUCFccvPk.mp4/QWaUCFccvPk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QWaUCFccvPk.mp4/QWaUCFccvPk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QWaUCFccvPk.m3u8/QWaUCFccvPk.m3u8"}, "slug": "curiosity-rover-report-sept-25-2014", "video_id": "QWaUCFccvPk", "youtube_id": "QWaUCFccvPk", "readable_id": "curiosity-rover-report-sept-25-2014"}, "jxf7XqvZWWg": {"duration": 291, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/disc-method-rotating-around-vertical-line/", "keywords": "", "id": "jxf7XqvZWWg", "title": "Disc method rotating around vertical line", "description": "Volume of solid created by rotating around vertical line that is not the y-axis using the disc method.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jxf7XqvZWWg.mp4/jxf7XqvZWWg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jxf7XqvZWWg.mp4/jxf7XqvZWWg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jxf7XqvZWWg.m3u8/jxf7XqvZWWg.m3u8"}, "slug": "disc-method-rotating-around-vertical-line", "video_id": "jxf7XqvZWWg", "youtube_id": "jxf7XqvZWWg", "readable_id": "disc-method-rotating-around-vertical-line"}, "iqf3ft0mh1M": {"duration": 411, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses/synapse-structure/", "keywords": "", "id": "iqf3ft0mh1M", "title": "Synapse structure", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iqf3ft0mh1M.mp4/iqf3ft0mh1M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iqf3ft0mh1M.mp4/iqf3ft0mh1M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iqf3ft0mh1M.m3u8/iqf3ft0mh1M.m3u8"}, "slug": "synapse-structure", "video_id": "iqf3ft0mh1M", "youtube_id": "iqf3ft0mh1M", "readable_id": "synapse-structure"}, "KaY8zqYfQI0": {"duration": 487, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/the-pantheon-rome-c-125/", "keywords": "pantheon, Rome, Art History, Khan Academy", "id": "KaY8zqYfQI0", "title": "The Pantheon", "description": "The Pantheon, Rome, c. 125 Speakers: Dr. Beth Harris, Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KaY8zqYfQI0.mp4/KaY8zqYfQI0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KaY8zqYfQI0.mp4/KaY8zqYfQI0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KaY8zqYfQI0.m3u8/KaY8zqYfQI0.m3u8"}, "slug": "the-pantheon-rome-c-125", "video_id": "KaY8zqYfQI0", "youtube_id": "KaY8zqYfQI0", "readable_id": "the-pantheon-rome-c-125"}, "qSFY7GKhSRs": {"duration": 1016, "path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/proof-u-3-2-pv-or-u-3-2-nrt/", "keywords": "thermodynamics, heat, work, internal, energy", "id": "qSFY7GKhSRs", "title": "Proof: U = (3/2)PV or U = (3/2)nRT", "description": "Conceptual proof that the internal energy of an ideal gas system is 3/2 PV.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qSFY7GKhSRs.mp4/qSFY7GKhSRs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qSFY7GKhSRs.mp4/qSFY7GKhSRs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qSFY7GKhSRs.m3u8/qSFY7GKhSRs.m3u8"}, "slug": "proof-u-3-2-pv-or-u-3-2-nrt", "video_id": "qSFY7GKhSRs", "youtube_id": "qSFY7GKhSRs", "readable_id": "proof-u-3-2-pv-or-u-3-2-nrt"}, "Bv_3hBUTOk4": {"duration": 106, "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-3-central-park/", "keywords": "", "id": "Bv_3hBUTOk4", "title": "3 Central Park", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Bv_3hBUTOk4.mp4/Bv_3hBUTOk4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Bv_3hBUTOk4.mp4/Bv_3hBUTOk4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Bv_3hBUTOk4.m3u8/Bv_3hBUTOk4.m3u8"}, "slug": "sat-3-central-park", "video_id": "Bv_3hBUTOk4", "youtube_id": "Bv_3hBUTOk4", "readable_id": "sat-3-central-park"}, "emOgJCoUy6Q": {"duration": 464, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/sepsis-sirs-mods/", "keywords": "", "id": "emOgJCoUy6Q", "title": "Sepsis: Systemic inflammatory response syndrome (SIRS) to multiple organ dysfunction syndrome (MODS)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/emOgJCoUy6Q.mp4/emOgJCoUy6Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/emOgJCoUy6Q.mp4/emOgJCoUy6Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/emOgJCoUy6Q.m3u8/emOgJCoUy6Q.m3u8"}, "slug": "sepsis-sirs-mods", "video_id": "emOgJCoUy6Q", "youtube_id": "emOgJCoUy6Q", "readable_id": "sepsis-sirs-mods"}, "Wfpb-fniSSk": {"duration": 518, "path": "khan/math/precalculus/hyperbolic_trig_topic/hyperbolic_trig_intro/hyperbolic-trig-functions-and-the-unit-hyperbola/", "keywords": "", "id": "Wfpb-fniSSk", "title": "Hyperbolic functions and the unit hyperbola", "description": "Why they are called hyperbolic functions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Wfpb-fniSSk.mp4/Wfpb-fniSSk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Wfpb-fniSSk.mp4/Wfpb-fniSSk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Wfpb-fniSSk.m3u8/Wfpb-fniSSk.m3u8"}, "slug": "hyperbolic-trig-functions-and-the-unit-hyperbola", "video_id": "Wfpb-fniSSk", "youtube_id": "Wfpb-fniSSk", "readable_id": "hyperbolic-trig-functions-and-the-unit-hyperbola"}, "mt6Nq0dzFjo": {"duration": 795, "path": "khan/math/pre-algebra/rates-and-ratios/rates_tutorial/usain-bolt-s-average-speed/", "keywords": "", "id": "mt6Nq0dzFjo", "title": "Finding average speed or rate", "description": "Using the formula for finding distance we can determine Usian Bolt's average speed, or rate, when he broke the world record in 2009 in the 100m. Watch.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mt6Nq0dzFjo.mp4/mt6Nq0dzFjo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mt6Nq0dzFjo.mp4/mt6Nq0dzFjo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mt6Nq0dzFjo.m3u8/mt6Nq0dzFjo.m3u8"}, "slug": "usain-bolt-s-average-speed", "video_id": "mt6Nq0dzFjo", "youtube_id": "mt6Nq0dzFjo", "readable_id": "usain-bolt-s-average-speed"}, "k-y6Hu6TUwA": {"duration": 52, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-8-4/", "keywords": "", "id": "k-y6Hu6TUwA", "title": "4 y exceeding x", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/k-y6Hu6TUwA.mp4/k-y6Hu6TUwA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/k-y6Hu6TUwA.mp4/k-y6Hu6TUwA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/k-y6Hu6TUwA.m3u8/k-y6Hu6TUwA.m3u8"}, "slug": "sat-2008-may-8-4", "video_id": "k-y6Hu6TUwA", "youtube_id": "k-y6Hu6TUwA", "readable_id": "sat-2008-may-8-4"}, "AH5h7F59Pcw": {"duration": 71, "path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/environment-modeling3/", "keywords": "", "id": "AH5h7F59Pcw", "title": "3. Parabolic arcs", "description": "Are we really creating parabolic curves using this construction? Let's gain some insight first.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AH5h7F59Pcw.mp4/AH5h7F59Pcw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AH5h7F59Pcw.mp4/AH5h7F59Pcw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AH5h7F59Pcw.m3u8/AH5h7F59Pcw.m3u8"}, "slug": "environment-modeling3", "video_id": "AH5h7F59Pcw", "youtube_id": "AH5h7F59Pcw", "readable_id": "environment-modeling3"}, "4TBVB4hLQhY": {"duration": 126, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-number-add-sub-pre-alg/adding-mixed-numbers/", "keywords": "U02_L3_T1_we3, Adding, Mixed, Numbers, CC_4_MD_2, CC_4_NF_3_b, CC_4_NF_3_d", "id": "4TBVB4hLQhY", "title": "Adding mixed numbers", "description": "Adding Mixed Numbers", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4TBVB4hLQhY.mp4/4TBVB4hLQhY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4TBVB4hLQhY.mp4/4TBVB4hLQhY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4TBVB4hLQhY.m3u8/4TBVB4hLQhY.m3u8"}, "slug": "adding-mixed-numbers", "video_id": "4TBVB4hLQhY", "youtube_id": "4TBVB4hLQhY", "readable_id": "adding-mixed-numbers"}, "paQ10POrZh8": {"duration": 285, "path": "khan/math/recreational-math/vi-hart/hexaflexagons/hexaflexagons-2/", "keywords": "", "id": "paQ10POrZh8", "title": "Hexaflexagons 2", "description": "This video is based on, and in honor of, Martin Gardner's column from 1956, \"Hexaflexagons,\" which can be found here: http://maa.org/pubs/focus/Gardner_Hexaflexagons12_1956.pdf. For more information, see the top comment below.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/paQ10POrZh8.mp4/paQ10POrZh8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/paQ10POrZh8.mp4/paQ10POrZh8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/paQ10POrZh8.m3u8/paQ10POrZh8.m3u8"}, "slug": "hexaflexagons-2", "video_id": "paQ10POrZh8", "youtube_id": "paQ10POrZh8", "readable_id": "hexaflexagons-2"}, "JNxXz3cQoNo": {"duration": 82, "path": "khan/college-admissions/get-started/access-to-college/who-can-succeed-in-college/", "keywords": "", "id": "JNxXz3cQoNo", "title": "Who can succeed in college?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JNxXz3cQoNo.mp4/JNxXz3cQoNo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JNxXz3cQoNo.mp4/JNxXz3cQoNo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JNxXz3cQoNo.m3u8/JNxXz3cQoNo.m3u8"}, "slug": "who-can-succeed-in-college", "video_id": "JNxXz3cQoNo", "youtube_id": "JNxXz3cQoNo", "readable_id": "who-can-succeed-in-college"}, "LDDKjQ-0jss": {"duration": 644, "path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/biodiversity-analyses-and-uncertainties/how-much-biodiversity-do-we-really-know/", "keywords": "", "id": "LDDKjQ-0jss", "title": "How much biodiversity do we really know?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LDDKjQ-0jss.mp4/LDDKjQ-0jss.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LDDKjQ-0jss.mp4/LDDKjQ-0jss.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LDDKjQ-0jss.m3u8/LDDKjQ-0jss.m3u8"}, "slug": "how-much-biodiversity-do-we-really-know", "video_id": "LDDKjQ-0jss", "youtube_id": "LDDKjQ-0jss", "readable_id": "how-much-biodiversity-do-we-really-know"}, "60u_ctp6UIw": {"duration": 259, "path": "khan/humanities/art-americas/british-colonies/colonial-period/john-singleton-copley-a-boy-with-a-flying-squirrel-henry-pelham-1765/", "keywords": "copley, squirrel, GAP, John Singleton Copley, Boy with a Flying Squirrel, Henry Pelham, Flying Squirrel, 1765, Museum of Fine Arts, Boston, American Painting, Flying Squirrel America, Colonial Art, Colonial, painting, Royal Academy, London, Georgian, American, Google Art Project, Khan Academy, Smarthistory, OER, Art History", "id": "60u_ctp6UIw", "title": "Copley, Boy with a Squirrel", "description": "John Singleton Copley, A Boy with a Flying Squirrel (Henry Pelham), 1765, 77.15 x 63.82 cm / 30-3/8 x 25-1/8 inches (Museum of Fine Arts, Boston)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/60u_ctp6UIw.mp4/60u_ctp6UIw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/60u_ctp6UIw.mp4/60u_ctp6UIw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/60u_ctp6UIw.m3u8/60u_ctp6UIw.m3u8"}, "slug": "john-singleton-copley-a-boy-with-a-flying-squirrel-henry-pelham-1765", "video_id": "60u_ctp6UIw", "youtube_id": "60u_ctp6UIw", "readable_id": "john-singleton-copley-a-boy-with-a-flying-squirrel-henry-pelham-1765"}, "mjxCTApdX3Q": {"duration": 238, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-near-east-a/bull-capital-susa/", "keywords": "Bull, Capital, audience hall, palace Darius, Achaemenid, Apadana, Susa, Iran Louvre", "id": "mjxCTApdX3Q", "title": "Capital of a column from the audience hall of the palace of Darius I, Susa", "description": "Capital of a column from the audience hall of the palace of Darius I, Susa, c. 510 B.C.E., \u00a0Achaemenid, \u00a0Tell of the Apadana, Susa, Iran (Louvre)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mjxCTApdX3Q.mp4/mjxCTApdX3Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mjxCTApdX3Q.mp4/mjxCTApdX3Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mjxCTApdX3Q.m3u8/mjxCTApdX3Q.m3u8"}, "slug": "bull-capital-susa", "video_id": "mjxCTApdX3Q", "youtube_id": "mjxCTApdX3Q", "readable_id": "bull-capital-susa"}, "2JxIjfqKTLs": {"duration": 309, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/deesis-mosaic/", "keywords": "Deesis, mosaic, Byzantine, Istanbul, Constantinople, Orthodox, Icon, art", "id": "2JxIjfqKTLs", "title": "De\u00ebsis mosaic, Hagia Sophia, Istanbul", "description": "De\u00ebsis (Christ with the Virgin Mary and John the Baptist), c. 1261, mosaic, imperial enclosure, south gallery, Hagia Sophia, Istanbul\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2JxIjfqKTLs.mp4/2JxIjfqKTLs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2JxIjfqKTLs.mp4/2JxIjfqKTLs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2JxIjfqKTLs.m3u8/2JxIjfqKTLs.m3u8"}, "slug": "deesis-mosaic", "video_id": "2JxIjfqKTLs", "youtube_id": "2JxIjfqKTLs", "readable_id": "deesis-mosaic"}, "x34OTtDE5q8": {"duration": 617, "path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/thermodynamics-part-2/", "keywords": "pressure, volume, temperature, physics, boyle, charle's, law, chemistry", "id": "x34OTtDE5q8", "title": "Thermodynamics part 2: Ideal gas law", "description": "To begin, Sal solves a constant temperature problem using PV=PV. Then he relates temperature to kinetic energy of a gas. In the second half of the video, he derives the ideal gas law.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x34OTtDE5q8.mp4/x34OTtDE5q8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x34OTtDE5q8.mp4/x34OTtDE5q8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x34OTtDE5q8.m3u8/x34OTtDE5q8.m3u8"}, "slug": "thermodynamics-part-2", "video_id": "x34OTtDE5q8", "youtube_id": "x34OTtDE5q8", "readable_id": "thermodynamics-part-2"}, "Svvr5uF_FZ8": {"duration": 447, "path": "khan/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/introduction-to-entropy/", "keywords": "education,online learning,learning,lessons,entropy,Second Law Of Thermodynamics (Quotation Subject)", "id": "Svvr5uF_FZ8", "title": "Introduction to entropy", "description": "Introduction to entropy, and how entropy relates to the number of possible states for a system.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Svvr5uF_FZ8.mp4/Svvr5uF_FZ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Svvr5uF_FZ8.mp4/Svvr5uF_FZ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Svvr5uF_FZ8.m3u8/Svvr5uF_FZ8.m3u8"}, "slug": "introduction-to-entropy", "video_id": "Svvr5uF_FZ8", "youtube_id": "Svvr5uF_FZ8", "readable_id": "introduction-to-entropy"}, "-KrSxA9NCf0": {"duration": 609, "path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-15-more-on-the-solution/", "keywords": "paulson, bailout, fed, inflation, deflation, credit, crunch", "id": "-KrSxA9NCf0", "title": "Bailout 15: More on the solution", "description": "More on the \"Plutsky Plan\".", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-KrSxA9NCf0.mp4/-KrSxA9NCf0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-KrSxA9NCf0.mp4/-KrSxA9NCf0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-KrSxA9NCf0.m3u8/-KrSxA9NCf0.m3u8"}, "slug": "bailout-15-more-on-the-solution", "video_id": "-KrSxA9NCf0", "youtube_id": "-KrSxA9NCf0", "readable_id": "bailout-15-more-on-the-solution"}, "hyWC_zPTLsI": {"duration": 194, "path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/mars-express/", "keywords": "", "id": "hyWC_zPTLsI", "title": "Mars express", "description": "Summary of the Mars Express Orbiter.For more information check out the mission page.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hyWC_zPTLsI.mp4/hyWC_zPTLsI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hyWC_zPTLsI.mp4/hyWC_zPTLsI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hyWC_zPTLsI.m3u8/hyWC_zPTLsI.m3u8"}, "slug": "mars-express", "video_id": "hyWC_zPTLsI", "youtube_id": "hyWC_zPTLsI", "readable_id": "mars-express"}, "MZz4OUOyFvg": {"duration": 563, "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/neuron-action-potential-mechanism/", "keywords": "", "id": "MZz4OUOyFvg", "title": "Neuron action potential mechanism", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MZz4OUOyFvg.mp4/MZz4OUOyFvg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MZz4OUOyFvg.mp4/MZz4OUOyFvg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MZz4OUOyFvg.m3u8/MZz4OUOyFvg.m3u8"}, "slug": "neuron-action-potential-mechanism", "video_id": "MZz4OUOyFvg", "youtube_id": "MZz4OUOyFvg", "readable_id": "neuron-action-potential-mechanism"}, "GiSpzFKI5_w": {"duration": 267, "path": "khan/math/algebra-basics/core-algebra-foundations/algebra-foundations-order-of-operations/order-of-operations/", "keywords": "U01_L5_T2_we1, Order, of, Operations, CC_5_OA_1, CC_6_EE_2_c", "id": "GiSpzFKI5_w", "title": "Order of operations example", "description": "Work through a challenging order of operations example with only positive numbers.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GiSpzFKI5_w.mp4/GiSpzFKI5_w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GiSpzFKI5_w.mp4/GiSpzFKI5_w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GiSpzFKI5_w.m3u8/GiSpzFKI5_w.m3u8"}, "slug": "order-of-operations", "video_id": "GiSpzFKI5_w", "youtube_id": "GiSpzFKI5_w", "readable_id": "order-of-operations"}, "8SAMey9Gl5I": {"duration": 1287, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/frb-commentary-3-big-picture/", "keywords": "fractional, reserve, banking", "id": "8SAMey9Gl5I", "title": "FRB commentary 3: Big picture", "description": "Summary of thoughts in last two videos. Discussion of why Fractional Reserve Banking is a subsidy to banks and allows them to arbitrage the yield curve.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8SAMey9Gl5I.mp4/8SAMey9Gl5I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8SAMey9Gl5I.mp4/8SAMey9Gl5I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8SAMey9Gl5I.m3u8/8SAMey9Gl5I.m3u8"}, "slug": "frb-commentary-3-big-picture", "video_id": "8SAMey9Gl5I", "youtube_id": "8SAMey9Gl5I", "readable_id": "frb-commentary-3-big-picture"}, "3gUE_P9T-Wk": {"duration": 335, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/first-living-things-on-land-clarification/", "keywords": "evolution, earth, life, algae", "id": "3gUE_P9T-Wk", "title": "First living things on land clarification", "description": "First living things on land clarification (This video copyrighted under Create Commons Attribution and Share-Alike CC-BY-SA license)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3gUE_P9T-Wk.mp4/3gUE_P9T-Wk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3gUE_P9T-Wk.mp4/3gUE_P9T-Wk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3gUE_P9T-Wk.m3u8/3gUE_P9T-Wk.m3u8"}, "slug": "first-living-things-on-land-clarification", "video_id": "3gUE_P9T-Wk", "youtube_id": "3gUE_P9T-Wk", "readable_id": "first-living-things-on-land-clarification"}, "huOnuYAyv6w": {"duration": 372, "path": "khan/humanities/history/euro-hist/world-war-i-tutorial/the-great-war-begins/", "keywords": "", "id": "huOnuYAyv6w", "title": "The Great War begins", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/huOnuYAyv6w.mp4/huOnuYAyv6w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/huOnuYAyv6w.mp4/huOnuYAyv6w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/huOnuYAyv6w.m3u8/huOnuYAyv6w.m3u8"}, "slug": "the-great-war-begins", "video_id": "huOnuYAyv6w", "youtube_id": "huOnuYAyv6w", "readable_id": "the-great-war-begins"}, "Nwh4MUie74E": {"duration": 167, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-15-equation-of-the-line/", "keywords": "", "id": "Nwh4MUie74E", "title": "15 Equation of line", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Nwh4MUie74E.mp4/Nwh4MUie74E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Nwh4MUie74E.mp4/Nwh4MUie74E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Nwh4MUie74E.m3u8/Nwh4MUie74E.m3u8"}, "slug": "sat-15-equation-of-the-line", "video_id": "Nwh4MUie74E", "youtube_id": "Nwh4MUie74E", "readable_id": "sat-15-equation-of-the-line"}, "BdlkhDHbN98": {"duration": 818, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/reimagine-the-pressure-volume-relationship/", "keywords": "", "id": "BdlkhDHbN98", "title": "Reimagine the pressure volume relationship", "description": "Understand what is happening at the cellular level to cause two identical left ventricular volumes to have such different pressures! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BdlkhDHbN98.mp4/BdlkhDHbN98.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BdlkhDHbN98.mp4/BdlkhDHbN98.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BdlkhDHbN98.m3u8/BdlkhDHbN98.m3u8"}, "slug": "reimagine-the-pressure-volume-relationship", "video_id": "BdlkhDHbN98", "youtube_id": "BdlkhDHbN98", "readable_id": "reimagine-the-pressure-volume-relationship"}, "V4z9Y2u30Qs": {"duration": 309, "path": "khan/partner-content/wi-phi/value-theory-1/problem-of-evil-part-1/", "keywords": "", "id": "V4z9Y2u30Qs", "title": "Ethics: Problem of Evil, Part 1", "description": "Part 1 of a trilogy. Greg lays out a classic argument that God does not exist, called \u2018The Problem of Evil\u2019. He distinguishes two versions of that argument, which are sometimes called \u2018the deductive\u2019 and \u2018the evidential\u2019 version. He goes into some details on the deductive version.\n\nSpeaker: Dr. Greg Ganssle, Senior Fellow Rivendell Institute, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/V4z9Y2u30Qs.mp4/V4z9Y2u30Qs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/V4z9Y2u30Qs.mp4/V4z9Y2u30Qs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/V4z9Y2u30Qs.m3u8/V4z9Y2u30Qs.m3u8"}, "slug": "problem-of-evil-part-1", "video_id": "V4z9Y2u30Qs", "youtube_id": "V4z9Y2u30Qs", "readable_id": "problem-of-evil-part-1"}, "FKraGDm2fUY": {"duration": 340, "path": "khan/math/differential-calculus/taking-derivatives/proving-the-chain-rule/chain-rule-proof/", "keywords": "", "id": "FKraGDm2fUY", "title": "Chain rule proof", "description": "Chain rule proof", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FKraGDm2fUY.mp4/FKraGDm2fUY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FKraGDm2fUY.mp4/FKraGDm2fUY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FKraGDm2fUY.m3u8/FKraGDm2fUY.m3u8"}, "slug": "chain-rule-proof", "video_id": "FKraGDm2fUY", "youtube_id": "FKraGDm2fUY", "readable_id": "chain-rule-proof"}, "yk0P7IpSiIg": {"duration": 479, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-trichomoniasis/", "keywords": "", "id": "yk0P7IpSiIg", "title": "What is trichomoniasis?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yk0P7IpSiIg.mp4/yk0P7IpSiIg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yk0P7IpSiIg.mp4/yk0P7IpSiIg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yk0P7IpSiIg.m3u8/yk0P7IpSiIg.m3u8"}, "slug": "what-is-trichomoniasis", "video_id": "yk0P7IpSiIg", "youtube_id": "yk0P7IpSiIg", "readable_id": "what-is-trichomoniasis"}, "ilWo7eWY73M": {"duration": 191, "path": "khan/humanities/art-1010/minimalism-earthworks/moma-serra-torqued-ellipse-iv/", "keywords": "", "id": "ilWo7eWY73M", "title": "Richard Serra, \"Torqued Ellipse IV\"", "description": "Richard Serra talks about discovering \"the potential for what steel could be.\" To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ilWo7eWY73M.mp4/ilWo7eWY73M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ilWo7eWY73M.mp4/ilWo7eWY73M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ilWo7eWY73M.m3u8/ilWo7eWY73M.m3u8"}, "slug": "moma-serra-torqued-ellipse-iv", "video_id": "ilWo7eWY73M", "youtube_id": "ilWo7eWY73M", "readable_id": "moma-serra-torqued-ellipse-iv"}, "wSqkieBUuo8": {"duration": 251, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/contango/", "keywords": "Contango", "id": "wSqkieBUuo8", "title": "Contango", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wSqkieBUuo8.mp4/wSqkieBUuo8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wSqkieBUuo8.mp4/wSqkieBUuo8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wSqkieBUuo8.m3u8/wSqkieBUuo8.m3u8"}, "slug": "contango", "video_id": "wSqkieBUuo8", "youtube_id": "wSqkieBUuo8", "readable_id": "contango"}, "Hqzakjo_dYg": {"duration": 442, "path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/more-exponential-decay-examples/", "keywords": "chemistry, exponential, decay", "id": "Hqzakjo_dYg", "title": "More exponential decay examples", "description": "A few more examples of exponential decay. Practice calculating k from half-life, and calculating initial mass.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hqzakjo_dYg.mp4/Hqzakjo_dYg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hqzakjo_dYg.mp4/Hqzakjo_dYg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hqzakjo_dYg.m3u8/Hqzakjo_dYg.m3u8"}, "slug": "more-exponential-decay-examples", "video_id": "Hqzakjo_dYg", "youtube_id": "Hqzakjo_dYg", "readable_id": "more-exponential-decay-examples"}, "9fEublFSTOg": {"duration": 218, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/frans-hals-malle-babbe-c-1633/", "keywords": "Smarthistory, Google Art Project, painting, art, Dutch, Khan Academy, art history, OER, stein, owl, drinking, brushwork", "id": "9fEublFSTOg", "title": "Hals, Malle Babbe", "description": "Frans Hals, Malle Babbe, c. 1633, oil on canvas, 78.50 x 66.20 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9fEublFSTOg.mp4/9fEublFSTOg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9fEublFSTOg.mp4/9fEublFSTOg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9fEublFSTOg.m3u8/9fEublFSTOg.m3u8"}, "slug": "frans-hals-malle-babbe-c-1633", "video_id": "9fEublFSTOg", "youtube_id": "9fEublFSTOg", "readable_id": "frans-hals-malle-babbe-c-1633"}, "IlFD0LzAZeo": {"duration": 528, "path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/constructing-an-exponential-equation-example/", "keywords": "", "id": "IlFD0LzAZeo", "title": "Constructing an exponential equation example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IlFD0LzAZeo.mp4/IlFD0LzAZeo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IlFD0LzAZeo.mp4/IlFD0LzAZeo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IlFD0LzAZeo.m3u8/IlFD0LzAZeo.m3u8"}, "slug": "constructing-an-exponential-equation-example", "video_id": "IlFD0LzAZeo", "youtube_id": "IlFD0LzAZeo", "readable_id": "constructing-an-exponential-equation-example"}, "DKXAHh9PZJQ": {"duration": 492, "path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/treatments-for-depression-psychological-therapies/", "keywords": "Therapy (Literature Subject),Depression (Symptom),Psychology (Field Of Study)", "id": "DKXAHh9PZJQ", "title": "Treatments for depression - Psychological therapies", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DKXAHh9PZJQ.mp4/DKXAHh9PZJQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DKXAHh9PZJQ.mp4/DKXAHh9PZJQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DKXAHh9PZJQ.m3u8/DKXAHh9PZJQ.m3u8"}, "slug": "treatments-for-depression-psychological-therapies", "video_id": "DKXAHh9PZJQ", "youtube_id": "DKXAHh9PZJQ", "readable_id": "treatments-for-depression-psychological-therapies"}, "j55j1NZoAKk": {"duration": 196, "path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/portrait-head-of-queen-tiye-with-a-crown-of-two-feathers/", "keywords": "Tiye, Amarna Period, Dynasty 18, New Kingdom, Egypt", "id": "j55j1NZoAKk", "title": "Portrait head of Queen Tiye with a crown of two feathers", "description": "A conversation between Dr. Beth Harris and Dr. Steven Zucker in front of Portrait Head of Queen Tiye with a Crown of Two Feathers, c. 1355 B.C.E., Amarna Period, Dynasty 18, New Kingdom, Egypt, yew wood, lapis lazuli, silver, gold, faience, 22.5 cm high (Egyptian Museum and Papyrus Collection at the Neues Museum, Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j55j1NZoAKk.mp4/j55j1NZoAKk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j55j1NZoAKk.mp4/j55j1NZoAKk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j55j1NZoAKk.m3u8/j55j1NZoAKk.m3u8"}, "slug": "portrait-head-of-queen-tiye-with-a-crown-of-two-feathers", "video_id": "j55j1NZoAKk", "youtube_id": "j55j1NZoAKk", "readable_id": "portrait-head-of-queen-tiye-with-a-crown-of-two-feathers"}, "kzhuZmzoX5o": {"duration": 627, "path": "khan/humanities/art-history-basics/art-1010/renaissance-art-introduction/", "keywords": "art history", "id": "kzhuZmzoX5o", "title": "Renaissance art", "description": "This is the Renaissance Art overview video for TICE ART 1010, a video from the Utah System of Higher Education", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kzhuZmzoX5o.mp4/kzhuZmzoX5o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kzhuZmzoX5o.mp4/kzhuZmzoX5o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kzhuZmzoX5o.m3u8/kzhuZmzoX5o.m3u8"}, "slug": "renaissance-art-introduction", "video_id": "kzhuZmzoX5o", "youtube_id": "kzhuZmzoX5o", "readable_id": "renaissance-art-introduction"}, "f3ySpxX9oeM": {"duration": 342, "path": "khan/math/pre-algebra/fractions-pre-alg/div-fractions-fractions-pre-alg/conceptual-understanding-of-dividing-fractions-by-fractions/", "keywords": "", "id": "f3ySpxX9oeM", "title": "Understanding division of fractions", "description": "Using a number line, we'll explain the rule of \"invert and multiply\" when dividing two fractions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/f3ySpxX9oeM.mp4/f3ySpxX9oeM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/f3ySpxX9oeM.mp4/f3ySpxX9oeM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/f3ySpxX9oeM.m3u8/f3ySpxX9oeM.m3u8"}, "slug": "conceptual-understanding-of-dividing-fractions-by-fractions", "video_id": "f3ySpxX9oeM", "youtube_id": "f3ySpxX9oeM", "readable_id": "conceptual-understanding-of-dividing-fractions-by-fractions"}, "-B-i-g6cjic": {"duration": 202, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p8-harder/", "keywords": "", "id": "-B-i-g6cjic", "title": "Linear and quadratic systems \u2014 Harder example", "description": "Watch Sal work through a harder Linear and quadratic systems problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-B-i-g6cjic.mp4/-B-i-g6cjic.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-B-i-g6cjic.mp4/-B-i-g6cjic.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-B-i-g6cjic.m3u8/-B-i-g6cjic.m3u8"}, "slug": "sat-math-p8-harder", "video_id": "-B-i-g6cjic", "youtube_id": "-B-i-g6cjic", "readable_id": "sat-math-p8-harder"}, "5HVCFrXQ9pw": {"duration": 860, "path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/currency-effect-on-trade/", "keywords": "Currency, Effect, on, Trade, Yuan, Renminbi", "id": "5HVCFrXQ9pw", "title": "Currency effect on trade", "description": "Currency Effect on Trade", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5HVCFrXQ9pw.mp4/5HVCFrXQ9pw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5HVCFrXQ9pw.mp4/5HVCFrXQ9pw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5HVCFrXQ9pw.m3u8/5HVCFrXQ9pw.m3u8"}, "slug": "currency-effect-on-trade", "video_id": "5HVCFrXQ9pw", "youtube_id": "5HVCFrXQ9pw", "readable_id": "currency-effect-on-trade"}, "ST-KdV7aVrE": {"duration": 193, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p10-harder/", "keywords": "", "id": "ST-KdV7aVrE", "title": "Interpreting nonlinear expressions \u2014 Harder example", "description": "Watch Sal work through a harder Interpreting nonlinear expressions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ST-KdV7aVrE.mp4/ST-KdV7aVrE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ST-KdV7aVrE.mp4/ST-KdV7aVrE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ST-KdV7aVrE.m3u8/ST-KdV7aVrE.m3u8"}, "slug": "sat-math-p10-harder", "video_id": "ST-KdV7aVrE", "youtube_id": "ST-KdV7aVrE", "readable_id": "sat-math-p10-harder"}, "yE3eQ6q39f4": {"duration": 498, "path": "khan/test-prep/mcat/physical-processes/current-and-resistance/voltmeters-and-ammeters/", "keywords": "", "id": "yE3eQ6q39f4", "title": "Voltmeters and Ammeters", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yE3eQ6q39f4.mp4/yE3eQ6q39f4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yE3eQ6q39f4.mp4/yE3eQ6q39f4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yE3eQ6q39f4.m3u8/yE3eQ6q39f4.m3u8"}, "slug": "voltmeters-and-ammeters", "video_id": "yE3eQ6q39f4", "youtube_id": "yE3eQ6q39f4", "readable_id": "voltmeters-and-ammeters"}, "dzjkh9K5Y8o": {"duration": 739, "path": "khan/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis/birch-reduction-ii/", "keywords": "", "id": "dzjkh9K5Y8o", "title": "Birch reduction II", "description": "The effect of electron-withdrawing and electron-donating groups", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dzjkh9K5Y8o.mp4/dzjkh9K5Y8o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dzjkh9K5Y8o.mp4/dzjkh9K5Y8o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dzjkh9K5Y8o.m3u8/dzjkh9K5Y8o.m3u8"}, "slug": "birch-reduction-ii", "video_id": "dzjkh9K5Y8o", "youtube_id": "dzjkh9K5Y8o", "readable_id": "birch-reduction-ii"}, "3XiHrsZNZko": {"duration": 701, "path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/aldol-condensation-jay/aldol-reaction/", "keywords": "Aldol, Reaction, Enolate, Tautomer, keto, enol, aldehyde", "id": "3XiHrsZNZko", "title": "Aldol reaction", "description": "Aldol Reaction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3XiHrsZNZko.mp4/3XiHrsZNZko.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3XiHrsZNZko.mp4/3XiHrsZNZko.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3XiHrsZNZko.m3u8/3XiHrsZNZko.m3u8"}, "slug": "aldol-reaction", "video_id": "3XiHrsZNZko", "youtube_id": "3XiHrsZNZko", "readable_id": "aldol-reaction"}, "u1HhUB3NP8g": {"duration": 654, "path": "khan/math/probability/regression/regression-correlation/proof-part-3-minimizing-squared-error-to-regression-line/", "keywords": "Proof, (Part, 3), Minimizing, Squared, Error, to, Regression, Line, CC_8_SP_2, CC_8_SP_3", "id": "u1HhUB3NP8g", "title": "Proof (part 3) minimizing squared error to regression line", "description": "Proof (Part 3) Minimizing Squared Error to Regression Line", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/u1HhUB3NP8g.mp4/u1HhUB3NP8g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/u1HhUB3NP8g.mp4/u1HhUB3NP8g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/u1HhUB3NP8g.m3u8/u1HhUB3NP8g.m3u8"}, "slug": "proof-part-3-minimizing-squared-error-to-regression-line", "video_id": "u1HhUB3NP8g", "youtube_id": "u1HhUB3NP8g", "readable_id": "proof-part-3-minimizing-squared-error-to-regression-line"}, "tzqMoOk9NWc": {"duration": 675, "path": "khan/humanities/history/american-civics/american-civics/sopa-and-pipa/", "keywords": "privacy, liberty, piracy, sopa, pipa, marquee", "id": "tzqMoOk9NWc", "title": "SOPA and PIPA", "description": "What SOPA and PIPA are at face value and what they could end up enabling", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tzqMoOk9NWc.mp4/tzqMoOk9NWc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tzqMoOk9NWc.mp4/tzqMoOk9NWc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tzqMoOk9NWc.m3u8/tzqMoOk9NWc.m3u8"}, "slug": "sopa-and-pipa", "video_id": "tzqMoOk9NWc", "youtube_id": "tzqMoOk9NWc", "readable_id": "sopa-and-pipa"}, "l9ft9jpriNA": {"duration": 143, "path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/probability-of-dependent-events/", "keywords": "U12_L2_T4_we2, Probability, of, Dependent, Events, CC_7_SP_7", "id": "l9ft9jpriNA", "title": "Example: Different ways to pick officers", "description": "Thinking about the different ways we can pick officers in order to find the probability of one situation in particular.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/l9ft9jpriNA.mp4/l9ft9jpriNA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/l9ft9jpriNA.mp4/l9ft9jpriNA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/l9ft9jpriNA.m3u8/l9ft9jpriNA.m3u8"}, "slug": "probability-of-dependent-events", "video_id": "l9ft9jpriNA", "youtube_id": "l9ft9jpriNA", "readable_id": "probability-of-dependent-events"}, "zNAL1R-hZr0": {"duration": 588, "path": "khan/science/organic-chemistry/stereochemistry-topic/diastereomers-meso-compounds/meso-compounds-new-july/", "keywords": "Meso Compound,meso compounds", "id": "zNAL1R-hZr0", "title": "Meso compounds", "description": "How to identify meso compounds", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zNAL1R-hZr0.mp4/zNAL1R-hZr0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zNAL1R-hZr0.mp4/zNAL1R-hZr0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zNAL1R-hZr0.m3u8/zNAL1R-hZr0.m3u8"}, "slug": "meso-compounds-new-july", "video_id": "zNAL1R-hZr0", "youtube_id": "zNAL1R-hZr0", "readable_id": "meso-compounds-new-july"}, "I7FDx4DPapw": {"duration": 813, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/relationship-between-bond-prices-and-interest-rates/", "keywords": "bond, price, interest, rate", "id": "I7FDx4DPapw", "title": "Relationship between bond prices and interest rates", "description": "Why bond prices move inversely to changes in interest rate", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I7FDx4DPapw.mp4/I7FDx4DPapw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I7FDx4DPapw.mp4/I7FDx4DPapw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I7FDx4DPapw.m3u8/I7FDx4DPapw.m3u8"}, "slug": "relationship-between-bond-prices-and-interest-rates", "video_id": "I7FDx4DPapw", "youtube_id": "I7FDx4DPapw", "readable_id": "relationship-between-bond-prices-and-interest-rates"}, "Ot0FxL8Vl7I": {"duration": 250, "path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/lhopitals-rule-to-solve-for-variable/", "keywords": "", "id": "Ot0FxL8Vl7I", "title": "L'Hopital's Rule to solve for variable", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Ot0FxL8Vl7I.mp4/Ot0FxL8Vl7I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Ot0FxL8Vl7I.mp4/Ot0FxL8Vl7I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Ot0FxL8Vl7I.m3u8/Ot0FxL8Vl7I.m3u8"}, "slug": "lhopitals-rule-to-solve-for-variable", "video_id": "Ot0FxL8Vl7I", "youtube_id": "Ot0FxL8Vl7I", "readable_id": "lhopitals-rule-to-solve-for-variable"}, "v8plb6V8BQo": {"duration": 885, "path": "khan/test-prep/iit-jee-subject/iit-jee/distance-between-planes/", "keywords": "2010, IIT, JEE, Paper, Problem, 51, Distance, Between, Planes", "id": "v8plb6V8BQo", "title": "Distance between planes", "description": "2010 IIT JEE Paper 1 Problem 51 Distance Between Planes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v8plb6V8BQo.mp4/v8plb6V8BQo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v8plb6V8BQo.mp4/v8plb6V8BQo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v8plb6V8BQo.m3u8/v8plb6V8BQo.m3u8"}, "slug": "distance-between-planes", "video_id": "v8plb6V8BQo", "youtube_id": "v8plb6V8BQo", "readable_id": "distance-between-planes"}, "jFv6k2OV7IU": {"duration": 815, "path": "khan/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/stoichiometry-example-problem-1/", "keywords": "stoichiometry, reactant, product", "id": "jFv6k2OV7IU", "title": "Stoichiometry example problem 1", "description": "Figuring out grams of reactants and product produced from reaction of phosphorous and chlorine.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jFv6k2OV7IU.mp4/jFv6k2OV7IU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jFv6k2OV7IU.mp4/jFv6k2OV7IU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jFv6k2OV7IU.m3u8/jFv6k2OV7IU.m3u8"}, "slug": "stoichiometry-example-problem-1", "video_id": "jFv6k2OV7IU", "youtube_id": "jFv6k2OV7IU", "readable_id": "stoichiometry-example-problem-1"}, "vJdqX2EQML4": {"duration": 422, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p2-harder/", "keywords": "", "id": "vJdqX2EQML4", "title": "Manipulating quadratic and exponential expressions \u2014 Harder example", "description": "Watch Sal work through a harder Manipulating quadratic and exponential expressions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vJdqX2EQML4.mp4/vJdqX2EQML4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vJdqX2EQML4.mp4/vJdqX2EQML4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vJdqX2EQML4.m3u8/vJdqX2EQML4.m3u8"}, "slug": "sat-math-p2-harder", "video_id": "vJdqX2EQML4", "youtube_id": "vJdqX2EQML4", "readable_id": "sat-math-p2-harder"}, "HBi8xjMchZc": {"duration": 184, "path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/mini-video-on-ion-size/", "keywords": "chemistry, ion, diameter", "id": "HBi8xjMchZc", "title": "Mini-video on ion size", "description": "Correcting a mistake and learning a bit about ion size", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HBi8xjMchZc.mp4/HBi8xjMchZc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HBi8xjMchZc.mp4/HBi8xjMchZc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HBi8xjMchZc.m3u8/HBi8xjMchZc.m3u8"}, "slug": "mini-video-on-ion-size", "video_id": "HBi8xjMchZc", "youtube_id": "HBi8xjMchZc", "readable_id": "mini-video-on-ion-size"}, "if5JGssffm8": {"duration": 450, "path": "khan/test-prep/mcat/chemical-processes/kinetics/catalysts/", "keywords": "", "id": "if5JGssffm8", "title": "Catalysts", "description": "How a catalyst speeds up a reaction by lowering the activation energy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/if5JGssffm8.mp4/if5JGssffm8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/if5JGssffm8.mp4/if5JGssffm8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/if5JGssffm8.m3u8/if5JGssffm8.m3u8"}, "slug": "catalysts", "video_id": "if5JGssffm8", "youtube_id": "if5JGssffm8", "readable_id": "catalysts"}, "CcM2R6vIvfw": {"duration": 83, "path": "khan/partner-content/nasa/nasa-welcome/nasa-mission-control/nasa-khan/", "keywords": "", "id": "CcM2R6vIvfw", "title": "Khan Academy & NASA introduction", "description": "A brief overview of the topics you can explore!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CcM2R6vIvfw.mp4/CcM2R6vIvfw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CcM2R6vIvfw.mp4/CcM2R6vIvfw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CcM2R6vIvfw.m3u8/CcM2R6vIvfw.m3u8"}, "slug": "nasa-khan", "video_id": "CcM2R6vIvfw", "youtube_id": "CcM2R6vIvfw", "readable_id": "nasa-khan"}, "A_2f3onF3S8": {"duration": 522, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/subcortical-cerebrum/", "keywords": "MCAT", "id": "A_2f3onF3S8", "title": "Subcortical cerebrum", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A_2f3onF3S8.mp4/A_2f3onF3S8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A_2f3onF3S8.mp4/A_2f3onF3S8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A_2f3onF3S8.m3u8/A_2f3onF3S8.m3u8"}, "slug": "subcortical-cerebrum", "video_id": "A_2f3onF3S8", "youtube_id": "A_2f3onF3S8", "readable_id": "subcortical-cerebrum"}, "2B68DWcOLj0": {"duration": 169, "path": "khan/humanities/monarchy-enlightenment/neo-classicism/girodet-the-sleep-of-endymion-1791/", "keywords": "Girodet, art history, neo-classicism, romanticism, louvre, smarthistory, enydmion", "id": "2B68DWcOLj0", "title": "Girodet, The Sleep of Endymion", "description": "Anne-Louis Girodet de Roussy-Trioson, The Sleep of Endymion, 1791, oil on canvas, 1.98 x 2.61m (6 feet 5-\u00be inches x 8 feet 6-\u00be inches), exhibited in the salons of 1793 and 1814 (Mus\u00e9e du Louvre, Paris) Speakers: Drs. Beth Harris and Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2B68DWcOLj0.mp4/2B68DWcOLj0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2B68DWcOLj0.mp4/2B68DWcOLj0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2B68DWcOLj0.m3u8/2B68DWcOLj0.m3u8"}, "slug": "girodet-the-sleep-of-endymion-1791", "video_id": "2B68DWcOLj0", "youtube_id": "2B68DWcOLj0", "readable_id": "girodet-the-sleep-of-endymion-1791"}, "HvHnYXpeRsA": {"duration": 145, "path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/martian-methane/", "keywords": "", "id": "HvHnYXpeRsA", "title": "Martian methane", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HvHnYXpeRsA.mp4/HvHnYXpeRsA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HvHnYXpeRsA.mp4/HvHnYXpeRsA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HvHnYXpeRsA.m3u8/HvHnYXpeRsA.m3u8"}, "slug": "martian-methane", "video_id": "HvHnYXpeRsA", "youtube_id": "HvHnYXpeRsA", "readable_id": "martian-methane"}, "cnCQGKx6LhE": {"duration": 383, "path": "khan/math/geometry/similarity/cc-solving-prob-similar-tri/golden-ratio-to-find-radius-of-moon/", "keywords": "", "id": "cnCQGKx6LhE", "title": "Golden ratio to find radius of moon", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cnCQGKx6LhE.mp4/cnCQGKx6LhE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cnCQGKx6LhE.mp4/cnCQGKx6LhE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cnCQGKx6LhE.m3u8/cnCQGKx6LhE.m3u8"}, "slug": "golden-ratio-to-find-radius-of-moon", "video_id": "cnCQGKx6LhE", "youtube_id": "cnCQGKx6LhE", "readable_id": "golden-ratio-to-find-radius-of-moon"}, "5I9dH5im24U": {"duration": 821, "path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/energy-inputs-for-tilling-a-hectare-of-land/", "keywords": "plough, till, agriculture, ha, hectare", "id": "5I9dH5im24U", "title": "Energy inputs for tilling a hectare of land", "description": "Thinking about energy consumption for tilling land", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5I9dH5im24U.mp4/5I9dH5im24U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5I9dH5im24U.mp4/5I9dH5im24U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5I9dH5im24U.m3u8/5I9dH5im24U.m3u8"}, "slug": "energy-inputs-for-tilling-a-hectare-of-land", "video_id": "5I9dH5im24U", "youtube_id": "5I9dH5im24U", "readable_id": "energy-inputs-for-tilling-a-hectare-of-land"}, "x-6yMjpsqJU": {"duration": 35, "path": "khan/science/discoveries-projects/discoveries/electromagnet/electromagnetic-field-forward-vs-reverse/", "keywords": "right hand rule test", "id": "x-6yMjpsqJU", "title": "Electromagnetic field (forward vs. reverse)", "description": "Apply current in both directions and notice the response is different.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/x-6yMjpsqJU.mp4/x-6yMjpsqJU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/x-6yMjpsqJU.mp4/x-6yMjpsqJU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/x-6yMjpsqJU.m3u8/x-6yMjpsqJU.m3u8"}, "slug": "electromagnetic-field-forward-vs-reverse", "video_id": "x-6yMjpsqJU", "youtube_id": "x-6yMjpsqJU", "readable_id": "electromagnetic-field-forward-vs-reverse"}, "wUb7tWgv49U": {"duration": 265, "path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/estimating-a-solution-to-nonlinear-system-with-calculator-part-2/", "keywords": "", "id": "wUb7tWgv49U", "title": "Estimating a solution to nonlinear system with calculator part 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wUb7tWgv49U.mp4/wUb7tWgv49U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wUb7tWgv49U.mp4/wUb7tWgv49U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wUb7tWgv49U.m3u8/wUb7tWgv49U.m3u8"}, "slug": "estimating-a-solution-to-nonlinear-system-with-calculator-part-2", "video_id": "wUb7tWgv49U", "youtube_id": "wUb7tWgv49U", "readable_id": "estimating-a-solution-to-nonlinear-system-with-calculator-part-2"}, "4aNoZjAhSr8": {"duration": 256, "path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/china-keeps-peg-but-diversifies-holdings/", "keywords": "China, keeps, peg, but, diversifies, holdings", "id": "4aNoZjAhSr8", "title": "China keeps peg but diversifies holdings", "description": "China keeps peg but diversifies holdings", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4aNoZjAhSr8.mp4/4aNoZjAhSr8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4aNoZjAhSr8.mp4/4aNoZjAhSr8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4aNoZjAhSr8.m3u8/4aNoZjAhSr8.m3u8"}, "slug": "china-keeps-peg-but-diversifies-holdings", "video_id": "4aNoZjAhSr8", "youtube_id": "4aNoZjAhSr8", "readable_id": "china-keeps-peg-but-diversifies-holdings"}, "JVm-ePTIKR4": {"duration": 433, "path": "khan/humanities/art-1010/architecture-20c/frank-lloyd-wright-solomon-r-guggenheim-museum-new-york-city-1942-1959/", "keywords": "Frank Lloyd Wright, FLW, Wright, architecture, Solomon R. Guggenheim Museum, Guggenheim, New York, 1942, 1959", "id": "JVm-ePTIKR4", "title": "Frank Lloyd Wright, Solomon R. Guggenheim Museum", "description": "Frank Lloyd Wright, Solomon R. Guggenheim Museum, New York City, 1942-1959. Speakers: Dr. Matthew Postal and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JVm-ePTIKR4.mp4/JVm-ePTIKR4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JVm-ePTIKR4.mp4/JVm-ePTIKR4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JVm-ePTIKR4.m3u8/JVm-ePTIKR4.m3u8"}, "slug": "frank-lloyd-wright-solomon-r-guggenheim-museum-new-york-city-1942-1959", "video_id": "JVm-ePTIKR4", "youtube_id": "JVm-ePTIKR4", "readable_id": "frank-lloyd-wright-solomon-r-guggenheim-museum-new-york-city-1942-1959"}, "xYoQQCO15GE": {"duration": 675, "path": "khan/science/health-and-medicine/current-issues-in-health-and-medicine/ebola-outbreak/understanding-the-ebola-virus-outbreak/", "keywords": "", "id": "xYoQQCO15GE", "title": "Understanding the Ebola virus outbreak", "description": "Dr. Rishi Desai is a pediatric infectious disease physician and former epidemiologist with the Centers for Disease Control and Prevention (CDC)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xYoQQCO15GE.mp4/xYoQQCO15GE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xYoQQCO15GE.mp4/xYoQQCO15GE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xYoQQCO15GE.m3u8/xYoQQCO15GE.m3u8"}, "slug": "understanding-the-ebola-virus-outbreak", "video_id": "xYoQQCO15GE", "youtube_id": "xYoQQCO15GE", "readable_id": "understanding-the-ebola-virus-outbreak"}, "GTwrVAbV56o": {"duration": 165, "path": "khan/math/recreational-math/vi-hart/hexaflexagons/flex-mex/", "keywords": "marquee", "id": "GTwrVAbV56o", "title": "Flex Mex", "description": "Might as well.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GTwrVAbV56o.mp4/GTwrVAbV56o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GTwrVAbV56o.mp4/GTwrVAbV56o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GTwrVAbV56o.m3u8/GTwrVAbV56o.m3u8"}, "slug": "flex-mex", "video_id": "GTwrVAbV56o", "youtube_id": "GTwrVAbV56o", "readable_id": "flex-mex"}, "RgvmKfvCwps": {"duration": 307, "path": "khan/test-prep/mcat/processing-the-environment/language/language-and-cognition/", "keywords": "language, cognition", "id": "RgvmKfvCwps", "title": "Theories of language and cognition", "description": "Learn about theories of the relationship between language and cognition. By Carole Yue.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RgvmKfvCwps.mp4/RgvmKfvCwps.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RgvmKfvCwps.mp4/RgvmKfvCwps.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RgvmKfvCwps.m3u8/RgvmKfvCwps.m3u8"}, "slug": "language-and-cognition", "video_id": "RgvmKfvCwps", "youtube_id": "RgvmKfvCwps", "readable_id": "language-and-cognition"}, "ks33lMoxst0": {"duration": 619, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/present-value/introduction-to-present-value/", "keywords": "present, value, finance", "id": "ks33lMoxst0", "title": "Introduction to present value", "description": "A choice between money now and money later.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ks33lMoxst0.mp4/ks33lMoxst0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ks33lMoxst0.mp4/ks33lMoxst0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ks33lMoxst0.m3u8/ks33lMoxst0.m3u8"}, "slug": "introduction-to-present-value", "video_id": "ks33lMoxst0", "youtube_id": "ks33lMoxst0", "readable_id": "introduction-to-present-value"}, "e7C2LRIoVTo": {"duration": 678, "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software/sscc-blended-softwarecriteria/", "keywords": "", "id": "e7C2LRIoVTo", "title": "Criteria to pick software", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e7C2LRIoVTo.mp4/e7C2LRIoVTo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e7C2LRIoVTo.mp4/e7C2LRIoVTo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e7C2LRIoVTo.m3u8/e7C2LRIoVTo.m3u8"}, "slug": "sscc-blended-softwarecriteria", "video_id": "e7C2LRIoVTo", "youtube_id": "e7C2LRIoVTo", "readable_id": "sscc-blended-softwarecriteria"}, "TV5kDqiJ1Os": {"duration": 344, "path": "khan/math/algebra/quadratics/completing_the_square/completing-the-square-to-solve-quadratic-equations/", "keywords": "u16_l5_t1_we3, Completing, the, Square, to, Solve, Quadratic, Equations", "id": "TV5kDqiJ1Os", "title": "Example 3: Completing the square", "description": "Completing the Square to Solve Quadratic Equations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TV5kDqiJ1Os.mp4/TV5kDqiJ1Os.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TV5kDqiJ1Os.mp4/TV5kDqiJ1Os.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TV5kDqiJ1Os.m3u8/TV5kDqiJ1Os.m3u8"}, "slug": "completing-the-square-to-solve-quadratic-equations", "video_id": "TV5kDqiJ1Os", "youtube_id": "TV5kDqiJ1Os", "readable_id": "completing-the-square-to-solve-quadratic-equations"}, "I1KRjQmFEIc": {"duration": 166, "path": "khan/test-prep/ap-art-history/africa-ap/great-zimbabwe-unesconhk/", "keywords": "NHK,UNESCO,World,Heritage,Patrimoine,mondial,convention", "id": "I1KRjQmFEIc", "title": "Great Zimbabwe National Monument (UNESCO/NHK)", "description": "The ruins of Great Zimbabwe, the capital of the Queen of Sheba, according to an age-old legend are a unique testimony to the Bantu civilization of the Shona between the 11th and 15th centuries. The city, which covers an area of nearly 80 ha, was an important trading centre and was renowned from the Middle Ages onwards. Source: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai URL: http://whc.unesco.org/en/list/364/", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/I1KRjQmFEIc.mp4/I1KRjQmFEIc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/I1KRjQmFEIc.mp4/I1KRjQmFEIc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/I1KRjQmFEIc.m3u8/I1KRjQmFEIc.m3u8"}, "slug": "great-zimbabwe-unesconhk", "video_id": "I1KRjQmFEIc", "youtube_id": "I1KRjQmFEIc", "readable_id": "great-zimbabwe-unesconhk"}, "dgHksfBFbjk": {"duration": 400, "path": "khan/math/geometry/right_triangles_topic/special_right_triangles/30-60-90-triangle-example-problem/", "keywords": "30, 60, 90, Triangle, Example, Problem", "id": "dgHksfBFbjk", "title": "30-60-90 triangle example problem", "description": "Using what we know about 30-60-90 triangles to solve what at first seems to be a challenging problem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dgHksfBFbjk.mp4/dgHksfBFbjk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dgHksfBFbjk.mp4/dgHksfBFbjk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dgHksfBFbjk.m3u8/dgHksfBFbjk.m3u8"}, "slug": "30-60-90-triangle-example-problem", "video_id": "dgHksfBFbjk", "youtube_id": "dgHksfBFbjk", "readable_id": "30-60-90-triangle-example-problem"}, "CrV1xCWdY-g": {"duration": 946, "path": "khan/math/linear-algebra/vectors_and_spaces/linear_independence/linear-algebra-introduction-to-linear-independence/", "keywords": "Linear, Algebra, Vectors, span, combination", "id": "CrV1xCWdY-g", "title": "Introduction to linear independence", "description": "Introduction to linear dependence and independence", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CrV1xCWdY-g.mp4/CrV1xCWdY-g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CrV1xCWdY-g.mp4/CrV1xCWdY-g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CrV1xCWdY-g.m3u8/CrV1xCWdY-g.m3u8"}, "slug": "linear-algebra-introduction-to-linear-independence", "video_id": "CrV1xCWdY-g", "youtube_id": "CrV1xCWdY-g", "readable_id": "linear-algebra-introduction-to-linear-independence"}, "M-WK4kpvAPw": {"duration": 71, "path": "khan/partner-content/exploratorium/exploratorium-chemistry/penny-battery/penny-battery-how-does-it-work/", "keywords": "", "id": "M-WK4kpvAPw", "title": "What's going on: Chemical energy into electrical energy", "description": "What's the science behind this activity? A battery is chemical energy converted into electrical energy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/M-WK4kpvAPw.mp4/M-WK4kpvAPw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/M-WK4kpvAPw.mp4/M-WK4kpvAPw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/M-WK4kpvAPw.m3u8/M-WK4kpvAPw.m3u8"}, "slug": "penny-battery-how-does-it-work", "video_id": "M-WK4kpvAPw", "youtube_id": "M-WK4kpvAPw", "readable_id": "penny-battery-how-does-it-work"}, "vXb0ZvkFkS8": {"duration": 576, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/motor-unit/", "keywords": "MCAT", "id": "vXb0ZvkFkS8", "title": "Motor unit", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vXb0ZvkFkS8.mp4/vXb0ZvkFkS8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vXb0ZvkFkS8.mp4/vXb0ZvkFkS8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vXb0ZvkFkS8.m3u8/vXb0ZvkFkS8.m3u8"}, "slug": "motor-unit", "video_id": "vXb0ZvkFkS8", "youtube_id": "vXb0ZvkFkS8", "readable_id": "motor-unit"}, "1kfq0aR3ASs": {"duration": 260, "path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-polynomials-1/", "keywords": "", "id": "1kfq0aR3ASs", "title": "How to factor quadratics with a leading coefficient of 1 (example)", "description": "Sal factors x^2-14x+40 as (x-4)(x-1) and x^2-x-12 as (x+3)(x-4).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1kfq0aR3ASs.mp4/1kfq0aR3ASs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1kfq0aR3ASs.mp4/1kfq0aR3ASs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1kfq0aR3ASs.m3u8/1kfq0aR3ASs.m3u8"}, "slug": "factoring-polynomials-1", "video_id": "1kfq0aR3ASs", "youtube_id": "1kfq0aR3ASs", "readable_id": "factoring-polynomials-1"}, "5U2XAJNazik": {"duration": 166, "path": "khan/test-prep/mcat/society-and-culture/social-structures/social-constructionism/", "keywords": "social constructionism", "id": "5U2XAJNazik", "title": "Social constructionism", "description": "Social constructionism observes how the interactions of individuals with their society and the world around them gives meaning to otherwise worthless things and creates the reality of the society.\u00a0 By Sydney Brown.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5U2XAJNazik.mp4/5U2XAJNazik.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5U2XAJNazik.mp4/5U2XAJNazik.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5U2XAJNazik.m3u8/5U2XAJNazik.m3u8"}, "slug": "social-constructionism", "video_id": "5U2XAJNazik", "youtube_id": "5U2XAJNazik", "readable_id": "social-constructionism"}, "QGfdhqbilY8": {"duration": 584, "path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-tan-domain/", "keywords": "", "id": "QGfdhqbilY8", "title": "Inverse tan domain and range", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QGfdhqbilY8.mp4/QGfdhqbilY8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QGfdhqbilY8.mp4/QGfdhqbilY8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QGfdhqbilY8.m3u8/QGfdhqbilY8.m3u8"}, "slug": "inverse-tan-domain", "video_id": "QGfdhqbilY8", "youtube_id": "QGfdhqbilY8", "readable_id": "inverse-tan-domain"}, "ceDV0QBpcMA": {"duration": 334, "path": "khan/math/geometry/congruence/working-with-triangles/another-isosceles-example-problem/", "keywords": "Another, Isosceles, Example, Problem", "id": "ceDV0QBpcMA", "title": "How to solve an isosceles triangle using algebra (example)", "description": "Sal solves the following problem: The measures of two angles of an isosceles triangle are 3x+5 and x+16. Find all possible values of x.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ceDV0QBpcMA.mp4/ceDV0QBpcMA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ceDV0QBpcMA.mp4/ceDV0QBpcMA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ceDV0QBpcMA.m3u8/ceDV0QBpcMA.m3u8"}, "slug": "another-isosceles-example-problem", "video_id": "ceDV0QBpcMA", "youtube_id": "ceDV0QBpcMA", "readable_id": "another-isosceles-example-problem"}, "_w9AwycMm2g": {"duration": 541, "path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/sleep-wake-disorders-breathing-related-sleep-disorders/", "keywords": "", "id": "_w9AwycMm2g", "title": "Breathing related sleep disorders", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_w9AwycMm2g.mp4/_w9AwycMm2g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_w9AwycMm2g.mp4/_w9AwycMm2g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_w9AwycMm2g.m3u8/_w9AwycMm2g.m3u8"}, "slug": "sleep-wake-disorders-breathing-related-sleep-disorders", "video_id": "_w9AwycMm2g", "youtube_id": "_w9AwycMm2g", "readable_id": "sleep-wake-disorders-breathing-related-sleep-disorders"}, "00fgAG6VrRQ": {"duration": 386, "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/increasing-opportunity-cost/", "keywords": "increasing, opportunity, cost, PPF", "id": "00fgAG6VrRQ", "title": "Increasing opportunity cost", "description": "Why the opportunity cost may increase as you pursue more rabbits", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/00fgAG6VrRQ.mp4/00fgAG6VrRQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/00fgAG6VrRQ.mp4/00fgAG6VrRQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/00fgAG6VrRQ.m3u8/00fgAG6VrRQ.m3u8"}, "slug": "increasing-opportunity-cost", "video_id": "00fgAG6VrRQ", "youtube_id": "00fgAG6VrRQ", "readable_id": "increasing-opportunity-cost"}, "Vx1dnPMPhl0": {"duration": 398, "path": "khan/test-prep/mcat/individuals-and-society/attributing-behavior-to-persons-or-situations/personal-control-locus-of-control-learned-helplessness-and-the-tyranny-of-choice/", "keywords": "", "id": "Vx1dnPMPhl0", "title": "Locus of control, learned helplessness, and the tyranny of choice", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Vx1dnPMPhl0.mp4/Vx1dnPMPhl0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Vx1dnPMPhl0.mp4/Vx1dnPMPhl0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Vx1dnPMPhl0.m3u8/Vx1dnPMPhl0.m3u8"}, "slug": "personal-control-locus-of-control-learned-helplessness-and-the-tyranny-of-choice", "video_id": "Vx1dnPMPhl0", "youtube_id": "Vx1dnPMPhl0", "readable_id": "personal-control-locus-of-control-learned-helplessness-and-the-tyranny-of-choice"}, "_rof2ExUzOU": {"duration": 302, "path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-43-46/", "keywords": "CAHSEE, practice, california, high, school, exit, examination", "id": "_rof2ExUzOU", "title": "CAHSEE practice: Problems 43-46", "description": "CAHSEE Practice: Problems 43-46", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_rof2ExUzOU.mp4/_rof2ExUzOU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_rof2ExUzOU.mp4/_rof2ExUzOU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_rof2ExUzOU.m3u8/_rof2ExUzOU.m3u8"}, "slug": "cahsee-practice-problems-43-46", "video_id": "_rof2ExUzOU", "youtube_id": "_rof2ExUzOU", "readable_id": "cahsee-practice-problems-43-46"}, "J0ndBMMQW20": {"duration": 401, "path": "khan/test-prep/mcat/chemical-processes/kinetics/forms-of-the-arrhenius-equation/", "keywords": "", "id": "J0ndBMMQW20", "title": "Forms of the Arrhenius equation", "description": "How to write different forms of the Arrhenius equation. Using the Arrhenius equation to look at how changing temperature and activation energy affects collisions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J0ndBMMQW20.mp4/J0ndBMMQW20.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J0ndBMMQW20.mp4/J0ndBMMQW20.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J0ndBMMQW20.m3u8/J0ndBMMQW20.m3u8"}, "slug": "forms-of-the-arrhenius-equation", "video_id": "J0ndBMMQW20", "youtube_id": "J0ndBMMQW20", "readable_id": "forms-of-the-arrhenius-equation"}, "DataCxJ5qcM": {"duration": 145, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h9-easier/", "keywords": "", "id": "DataCxJ5qcM", "title": "Graphing linear equations \u2014 Basic example", "description": "Watch Sal work through a basic Graphing linear equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DataCxJ5qcM.mp4/DataCxJ5qcM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DataCxJ5qcM.mp4/DataCxJ5qcM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DataCxJ5qcM.m3u8/DataCxJ5qcM.m3u8"}, "slug": "sat-math-h9-easier", "video_id": "DataCxJ5qcM", "youtube_id": "DataCxJ5qcM", "readable_id": "sat-math-h9-easier"}, "aj2el_owSg4": {"duration": 488, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/il-gesu-rome-consecrated-1584/", "keywords": "Rome, Il Gesu, Baroque art, smarthistory, Giacomo Barozzi da Vignola, il Baciccio, Italy, art history", "id": "aj2el_owSg4", "title": "Il Ges\u00f9, including Triumph of the Name of Jesus ceiling fresco", "description": "Giacomo Barozzi da Vignola and Giacomo Barozzi da Vignola, Church of Il Gesu, Rome (consecrated 1584, ceiling fresco, The Triumph of the Name of Jesus, by il Baciccio, also known as Giovanni Battista Gaulli, 1672-1685). Speakers: Frank Dabell, Beth Harris, and Steven Zucker Made with our partners, contexttravel.org", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aj2el_owSg4.mp4/aj2el_owSg4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aj2el_owSg4.mp4/aj2el_owSg4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aj2el_owSg4.m3u8/aj2el_owSg4.m3u8"}, "slug": "il-gesu-rome-consecrated-1584", "video_id": "aj2el_owSg4", "youtube_id": "aj2el_owSg4", "readable_id": "il-gesu-rome-consecrated-1584"}, "4IWfJ7-CYfE": {"duration": 389, "path": "khan/math/pre-algebra/decimals-pre-alg/multiplying-decimals-pre-alg/more-intuition-on-multiplying-decimals/", "keywords": "", "id": "4IWfJ7-CYfE", "title": "Multiplying decimals: place value and reordering", "description": "We want you to develop an intuition about how to work with decimals. Understanding how you can rewrite decimals by considering the place value will help you multiply!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4IWfJ7-CYfE.mp4/4IWfJ7-CYfE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4IWfJ7-CYfE.mp4/4IWfJ7-CYfE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4IWfJ7-CYfE.m3u8/4IWfJ7-CYfE.m3u8"}, "slug": "more-intuition-on-multiplying-decimals", "video_id": "4IWfJ7-CYfE", "youtube_id": "4IWfJ7-CYfE", "readable_id": "more-intuition-on-multiplying-decimals"}, "yYbzJs6vgv8": {"duration": 401, "path": "khan/test-prep/mcat/chemical-processes/thermochemistry/a-look-at-a-seductive-but-wrong-gibbs-spontaneity-proof/", "keywords": "gibbs, free, energy, chemistry, thermodynamics", "id": "yYbzJs6vgv8", "title": "A look at a seductive but wrong Gibbs/spontaneity proof", "description": "A look at why the \"proof\" of the relation between changes in Gibbs Free Energy and Spontaneity is wrong in many textbooks.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yYbzJs6vgv8.mp4/yYbzJs6vgv8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yYbzJs6vgv8.mp4/yYbzJs6vgv8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yYbzJs6vgv8.m3u8/yYbzJs6vgv8.m3u8"}, "slug": "a-look-at-a-seductive-but-wrong-gibbs-spontaneity-proof", "video_id": "yYbzJs6vgv8", "youtube_id": "yYbzJs6vgv8", "readable_id": "a-look-at-a-seductive-but-wrong-gibbs-spontaneity-proof"}, "9IZhzUDSBTY": {"duration": 266, "path": "khan/humanities/global-culture/identity-body/identity-body-united-states/sherrie-levine-untitled-after-edward-weston/", "keywords": "", "id": "9IZhzUDSBTY", "title": "Sherrie Levine, Untitled (After Edward Weston, ca. 1925)", "description": "Sherrie Levine, Untitled (After Edward Weston, ca. 1925), Type C color print, 19.5 x 14.625 in. (49.2 x 36.89 cm), 1981 Speakers: Dr. Shana Gallagher-Lindsay, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9IZhzUDSBTY.mp4/9IZhzUDSBTY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9IZhzUDSBTY.mp4/9IZhzUDSBTY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9IZhzUDSBTY.m3u8/9IZhzUDSBTY.m3u8"}, "slug": "sherrie-levine-untitled-after-edward-weston", "video_id": "9IZhzUDSBTY", "youtube_id": "9IZhzUDSBTY", "readable_id": "sherrie-levine-untitled-after-edward-weston"}, "f_DTiXZpb8M": {"duration": 741, "path": "khan/math/linear-algebra/matrix_transformations/composition_of_transformations/compositions-of-linear-transformations-1/", "keywords": "linear, transformation, compositions", "id": "f_DTiXZpb8M", "title": "Compositions of linear transformations 1", "description": "Introduction to compositions of Linear Transformations", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/f_DTiXZpb8M.mp4/f_DTiXZpb8M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/f_DTiXZpb8M.mp4/f_DTiXZpb8M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/f_DTiXZpb8M.m3u8/f_DTiXZpb8M.m3u8"}, "slug": "compositions-of-linear-transformations-1", "video_id": "f_DTiXZpb8M", "youtube_id": "f_DTiXZpb8M", "readable_id": "compositions-of-linear-transformations-1"}, "5ctsUsvIp8w": {"duration": 128, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/plot-ordered-pairs/", "keywords": "u13_l1_t1_we1, Plot, ordered, pairs", "id": "5ctsUsvIp8w", "title": "Coordinate plane: plot ordered pairs", "description": "We're plotting an ordered pair on the x (horizontal) axis and y (vertical) axis of the coordinate plane.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5ctsUsvIp8w.mp4/5ctsUsvIp8w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5ctsUsvIp8w.mp4/5ctsUsvIp8w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5ctsUsvIp8w.m3u8/5ctsUsvIp8w.m3u8"}, "slug": "plot-ordered-pairs", "video_id": "5ctsUsvIp8w", "youtube_id": "5ctsUsvIp8w", "readable_id": "plot-ordered-pairs"}, "oTbvYGH_Hiw": {"duration": 670, "path": "khan/humanities/history/american-civics/american-civics/electoral-college/", "keywords": "politics, electoral, college", "id": "oTbvYGH_Hiw", "title": "Electoral college", "description": "How we elect our President in the United States", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oTbvYGH_Hiw.mp4/oTbvYGH_Hiw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oTbvYGH_Hiw.mp4/oTbvYGH_Hiw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oTbvYGH_Hiw.m3u8/oTbvYGH_Hiw.m3u8"}, "slug": "electoral-college", "video_id": "oTbvYGH_Hiw", "youtube_id": "oTbvYGH_Hiw", "readable_id": "electoral-college"}, "be9rz_HOnXI": {"duration": 236, "path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/giotto-the-entombment-of-mary-1310/", "keywords": "Giotto, Entombment, GAP, Google Art Project, Khan Academy, Smarthistory, Gem\u00e4ldegalerie, Tuscany, Italian, Proto-Renaissance, Medieval, Middle Ages, 14th century, fourteenth century, Italy, chiaroscuro, emotion, OER", "id": "be9rz_HOnXI", "title": "Giotto, The Entombment of Mary", "description": "Giotto, The Entombment of Mary, 1310, tempera on poplar, 75 x 179 cm (Gem\u00e4ldegalerie, Kaiser Friedrich-Museums-Verein, Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/be9rz_HOnXI.mp4/be9rz_HOnXI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/be9rz_HOnXI.mp4/be9rz_HOnXI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/be9rz_HOnXI.m3u8/be9rz_HOnXI.m3u8"}, "slug": "giotto-the-entombment-of-mary-1310", "video_id": "be9rz_HOnXI", "youtube_id": "be9rz_HOnXI", "readable_id": "giotto-the-entombment-of-mary-1310"}, "eLdhifUUMmk": {"duration": 339, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/calculating-integral-disc-method-around-vertical-line/", "keywords": "solid of revolution", "id": "eLdhifUUMmk", "title": "Calculating integral disc method around vertical line", "description": "Let's calculate the integral from the last video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eLdhifUUMmk.mp4/eLdhifUUMmk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eLdhifUUMmk.mp4/eLdhifUUMmk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eLdhifUUMmk.m3u8/eLdhifUUMmk.m3u8"}, "slug": "calculating-integral-disc-method-around-vertical-line", "video_id": "eLdhifUUMmk", "youtube_id": "eLdhifUUMmk", "readable_id": "calculating-integral-disc-method-around-vertical-line"}, "NEzJH-JrAdw": {"duration": 129, "path": "khan/partner-content/pixar/rendering/rendering1/overview-rendering/", "keywords": "", "id": "NEzJH-JrAdw", "title": "Introduction to rendering", "description": "Overview of this topic", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NEzJH-JrAdw.mp4/NEzJH-JrAdw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NEzJH-JrAdw.mp4/NEzJH-JrAdw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NEzJH-JrAdw.m3u8/NEzJH-JrAdw.m3u8"}, "slug": "overview-rendering", "video_id": "NEzJH-JrAdw", "youtube_id": "NEzJH-JrAdw", "readable_id": "overview-rendering"}, "JAe14gwSvIU": {"duration": 229, "path": "khan/humanities/art-1010/wwi-dada/art-great-war/raymond-duchamp-villon-horse-1914/", "keywords": "Raymond Duchamp-Villon, Duchamp-Villon, Horse, 1914, bronze, Art Institute of Chicago, Chicago, WWI, sculpture, First World War, Machine art, modern sculpture, Google Art Project, Khan Academy, Smarthistory, art history, OER", "id": "JAe14gwSvIU", "title": "Duchamp-Villon, Horse", "description": "Raymond Duchamp-Villon, Horse, 1914, bronze, 39-3/8 x 24 x 36 inches / 99 x 61 x 91.4 cm (Art Institute of Chicago)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JAe14gwSvIU.mp4/JAe14gwSvIU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JAe14gwSvIU.mp4/JAe14gwSvIU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JAe14gwSvIU.m3u8/JAe14gwSvIU.m3u8"}, "slug": "raymond-duchamp-villon-horse-1914", "video_id": "JAe14gwSvIU", "youtube_id": "JAe14gwSvIU", "readable_id": "raymond-duchamp-villon-horse-1914"}, "YlhDUSntCI4": {"duration": 226, "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/caspar-david-friedrich-solitary-tree-or-lone-tree-1822/", "keywords": "Caspar David Friedrich, Friedrich, Solitary Tree, Lone Tree, 1822, Alte Nationalgalerie, Berlin, Romanticism, Sublime, Landscape, weathered, gnarled, art, painting, German, art history, Khan Academy, Smarthistory, Google Art Project, OER", "id": "YlhDUSntCI4", "title": "Friedrich, The Lone Tree", "description": "Caspar David Friedrich, Solitary Tree (or Lone Tree), 1822, oil on canvas, 55 x 71 cm (Alte Nationalgalerie, Berlin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YlhDUSntCI4.mp4/YlhDUSntCI4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YlhDUSntCI4.mp4/YlhDUSntCI4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YlhDUSntCI4.m3u8/YlhDUSntCI4.m3u8"}, "slug": "caspar-david-friedrich-solitary-tree-or-lone-tree-1822", "video_id": "YlhDUSntCI4", "youtube_id": "YlhDUSntCI4", "readable_id": "caspar-david-friedrich-solitary-tree-or-lone-tree-1822"}, "SRPQ62dR6b4": {"duration": 528, "path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/formation-carboxylic-acid-derivatives-sal/amides-anhydrides-esters-and-acyl-chlorides/", "keywords": "Anhydrides, Esters and Acyl Chlorides", "id": "SRPQ62dR6b4", "title": "Amides, anhydrides, esters, and acyl chlorides", "description": "Carboxylic Acid Derivatives - Amides, Anhydrides, Esters and Acyl Chlorides", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/SRPQ62dR6b4.mp4/SRPQ62dR6b4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/SRPQ62dR6b4.mp4/SRPQ62dR6b4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/SRPQ62dR6b4.m3u8/SRPQ62dR6b4.m3u8"}, "slug": "amides-anhydrides-esters-and-acyl-chlorides", "video_id": "SRPQ62dR6b4", "youtube_id": "SRPQ62dR6b4", "readable_id": "amides-anhydrides-esters-and-acyl-chlorides"}, "kDOepUPGhFs": {"duration": 529, "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes-jay/alkene-intro-and-stability/", "keywords": "", "id": "kDOepUPGhFs", "title": "Alkene intro and stability", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kDOepUPGhFs.mp4/kDOepUPGhFs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kDOepUPGhFs.mp4/kDOepUPGhFs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kDOepUPGhFs.m3u8/kDOepUPGhFs.m3u8"}, "slug": "alkene-intro-and-stability", "video_id": "kDOepUPGhFs", "youtube_id": "kDOepUPGhFs", "readable_id": "alkene-intro-and-stability"}, "v6L8--MlnKo": {"duration": 358, "path": "khan/math/algebra/systems-of-linear-equations/systems-of-linear-equations-word-problems/substitution-method-3/", "keywords": "u14_l2_t1_we3, Substitution, Method, CC_8_EE_8_a, CC_8_EE_8_b, CC_8_EE_8_c, CC_8_F_3, CC_39336_A-REI_6", "id": "v6L8--MlnKo", "title": "Systems of equations word problems example: Nickles and quarters", "description": "Sal solves a word problem about the number of nickles and quarters in a piggy bank by creating a system of equations and solving it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v6L8--MlnKo.mp4/v6L8--MlnKo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v6L8--MlnKo.mp4/v6L8--MlnKo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v6L8--MlnKo.m3u8/v6L8--MlnKo.m3u8"}, "slug": "substitution-method-3", "video_id": "v6L8--MlnKo", "youtube_id": "v6L8--MlnKo", "readable_id": "substitution-method-3"}, "4PlkCiEXBQI": {"duration": 188, "path": "khan/math/pre-algebra/fractions-pre-alg/multiplying-fractions-pre-alg/multiplying-fractions-and-whole-numbers/", "keywords": "", "id": "4PlkCiEXBQI", "title": "Multiplying unit fractions and whole numbers", "description": "Don't let multiplying whole numbers and fractions get you down. We got this. This explanation will help you become a pro.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4PlkCiEXBQI.mp4/4PlkCiEXBQI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4PlkCiEXBQI.mp4/4PlkCiEXBQI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4PlkCiEXBQI.m3u8/4PlkCiEXBQI.m3u8"}, "slug": "multiplying-fractions-and-whole-numbers", "video_id": "4PlkCiEXBQI", "youtube_id": "4PlkCiEXBQI", "readable_id": "multiplying-fractions-and-whole-numbers"}, "VqAa_cmZ7OY": {"duration": 762, "path": "khan/science/chemistry/chem-kinetics/spectrophotometry-tutorial/spectrophotometry-example/", "keywords": "spectrophotometry, beer-lambert, absorbance", "id": "VqAa_cmZ7OY", "title": "Spectrophotometry example", "description": "Spectrophotometry Example - determining concentration based on absorbance", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VqAa_cmZ7OY.mp4/VqAa_cmZ7OY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VqAa_cmZ7OY.mp4/VqAa_cmZ7OY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VqAa_cmZ7OY.m3u8/VqAa_cmZ7OY.m3u8"}, "slug": "spectrophotometry-example", "video_id": "VqAa_cmZ7OY", "youtube_id": "VqAa_cmZ7OY", "readable_id": "spectrophotometry-example"}, "QCTKPkemffw": {"duration": 41, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-7/", "keywords": "", "id": "QCTKPkemffw", "title": "7 Fraction as percent", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QCTKPkemffw.mp4/QCTKPkemffw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QCTKPkemffw.mp4/QCTKPkemffw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QCTKPkemffw.m3u8/QCTKPkemffw.m3u8"}, "slug": "sat-2010-may-6-7", "video_id": "QCTKPkemffw", "youtube_id": "QCTKPkemffw", "readable_id": "sat-2010-may-6-7"}, "CM3IoLOKP5U": {"duration": 121, "path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models/sscc-blended-flipped/", "keywords": "", "id": "CM3IoLOKP5U", "title": "The Flipped Classroom Model", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CM3IoLOKP5U.mp4/CM3IoLOKP5U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CM3IoLOKP5U.mp4/CM3IoLOKP5U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CM3IoLOKP5U.m3u8/CM3IoLOKP5U.m3u8"}, "slug": "sscc-blended-flipped", "video_id": "CM3IoLOKP5U", "youtube_id": "CM3IoLOKP5U", "readable_id": "sscc-blended-flipped"}, "iewvEGWARBY": {"duration": 229, "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/depreciation-amortization-tut/depreciating-the-truck/", "keywords": "depreciation, amortization, capital, expenditures", "id": "iewvEGWARBY", "title": "Depreciating the truck", "description": "Depreciation the truck spreads out the expense", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iewvEGWARBY.mp4/iewvEGWARBY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iewvEGWARBY.mp4/iewvEGWARBY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iewvEGWARBY.m3u8/iewvEGWARBY.m3u8"}, "slug": "depreciating-the-truck", "video_id": "iewvEGWARBY", "youtube_id": "iewvEGWARBY", "readable_id": "depreciating-the-truck"}, "5fK8HEYNRuQ": {"duration": 199, "path": "khan/math/pre-algebra/fractions-pre-alg/add-subtract-fracs-wp-pre-alg/subtracting-fractions-with-unlike-denominators-word-problem/", "keywords": "", "id": "5fK8HEYNRuQ", "title": "Subtracting fractions with unlike denominators word problem", "description": "Sal walks through a mixed number word problem involving subtraction.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5fK8HEYNRuQ.mp4/5fK8HEYNRuQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5fK8HEYNRuQ.mp4/5fK8HEYNRuQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5fK8HEYNRuQ.m3u8/5fK8HEYNRuQ.m3u8"}, "slug": "subtracting-fractions-with-unlike-denominators-word-problem", "video_id": "5fK8HEYNRuQ", "youtube_id": "5fK8HEYNRuQ", "readable_id": "subtracting-fractions-with-unlike-denominators-word-problem"}, "R8qygu1RUOI": {"duration": 241, "path": "khan/partner-content/lebron-asks-subject/lebron-asks/lebron-asks-about-newton-s-3rd-law/", "keywords": "lebron, khan, newton's, third, law", "id": "R8qygu1RUOI", "title": "LeBron Asks: How does shooting a basketball illustrate Newton's 3rd Law?", "description": "How does a basketball apply a force to the shooter's hand?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R8qygu1RUOI.mp4/R8qygu1RUOI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R8qygu1RUOI.mp4/R8qygu1RUOI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R8qygu1RUOI.m3u8/R8qygu1RUOI.m3u8"}, "slug": "lebron-asks-about-newton-s-3rd-law", "video_id": "R8qygu1RUOI", "youtube_id": "R8qygu1RUOI", "readable_id": "lebron-asks-about-newton-s-3rd-law"}, "UNWxKDvBFik": {"duration": 621, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/atrial-septal-defect/", "keywords": "", "id": "UNWxKDvBFik", "title": "Atrial septal defect", "description": "An atrial septal defect is a hole between the two atriums of the heart. Normally this hole is present at birth but closes within a few days of life. Failure of this hole to close is called an atrial septal defect, and usually is asymptomatic (no obvious symptoms are present).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/UNWxKDvBFik.mp4/UNWxKDvBFik.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/UNWxKDvBFik.mp4/UNWxKDvBFik.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/UNWxKDvBFik.m3u8/UNWxKDvBFik.m3u8"}, "slug": "atrial-septal-defect", "video_id": "UNWxKDvBFik", "youtube_id": "UNWxKDvBFik", "readable_id": "atrial-septal-defect"}, "-1w9RXhCmsE": {"duration": 154, "path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-datawires/", "keywords": "", "id": "-1w9RXhCmsE", "title": "Data wires", "description": "data wires allow you to send values directly from input sensors to output devices", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-1w9RXhCmsE.mp4/-1w9RXhCmsE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-1w9RXhCmsE.mp4/-1w9RXhCmsE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-1w9RXhCmsE.m3u8/-1w9RXhCmsE.m3u8"}, "slug": "lego-datawires", "video_id": "-1w9RXhCmsE", "youtube_id": "-1w9RXhCmsE", "readable_id": "lego-datawires"}, "ySDcYZEcxcQ": {"duration": 792, "path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-42/", "keywords": "crash course", "id": "ySDcYZEcxcQ", "title": "Globalization II - good or bad?", "description": "In which John asks whether globalization is a net positive for humanity. While the new global economy has created a lot of wealth, and lifted a lot of people out of poverty, it also has some effects that aren't so hot. Wealth disparity, rising divorce rates, environmental damage, and new paths for the spread of disease. So does all this outweigh the economic benefits, the innovation, and the relative peace that come with interconnected economies? As usual, the answer is not simple. In this case, we're living in the middle of the events we're discussing, so it's hard to know how it's going to turn out.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ySDcYZEcxcQ.mp4/ySDcYZEcxcQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ySDcYZEcxcQ.mp4/ySDcYZEcxcQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ySDcYZEcxcQ.m3u8/ySDcYZEcxcQ.m3u8"}, "slug": "crash-course-world-history-42", "video_id": "ySDcYZEcxcQ", "youtube_id": "ySDcYZEcxcQ", "readable_id": "crash-course-world-history-42"}, "8jV1SwpZ-W4": {"duration": 656, "path": "khan/humanities/history/1600s-1800s/benjamin-franklin/poor-richard/", "keywords": "", "id": "8jV1SwpZ-W4", "title": "Benjamin Franklin and Poor Richard's Almanac", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson discuss Benjamin Franklin's\u00a0Poor Richard's Almanac.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8jV1SwpZ-W4.mp4/8jV1SwpZ-W4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8jV1SwpZ-W4.mp4/8jV1SwpZ-W4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8jV1SwpZ-W4.m3u8/8jV1SwpZ-W4.m3u8"}, "slug": "poor-richard", "video_id": "8jV1SwpZ-W4", "youtube_id": "8jV1SwpZ-W4", "readable_id": "poor-richard"}, "gYv8sttBIqs": {"duration": 499, "path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-duplicate-row-determinant/", "keywords": "linear, algebra, determinant", "id": "gYv8sttBIqs", "title": "Duplicate row determinant", "description": "Determinant of a matrix with duplicate rows", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gYv8sttBIqs.mp4/gYv8sttBIqs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gYv8sttBIqs.mp4/gYv8sttBIqs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gYv8sttBIqs.m3u8/gYv8sttBIqs.m3u8"}, "slug": "linear-algebra-duplicate-row-determinant", "video_id": "gYv8sttBIqs", "youtube_id": "gYv8sttBIqs", "readable_id": "linear-algebra-duplicate-row-determinant"}, "xyTxrbsfLpg": {"duration": 191, "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-franz-kline/", "keywords": "", "id": "xyTxrbsfLpg", "title": "Franz Kline", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting or learn more about the art of this time in the online history course Modern and Contemporary Art: 1945-1989.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xyTxrbsfLpg.mp4/xyTxrbsfLpg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xyTxrbsfLpg.mp4/xyTxrbsfLpg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xyTxrbsfLpg.m3u8/xyTxrbsfLpg.m3u8"}, "slug": "moma-franz-kline", "video_id": "xyTxrbsfLpg", "youtube_id": "xyTxrbsfLpg", "readable_id": "moma-franz-kline"}, "gGeC0ntvxR8": {"duration": 365, "path": "khan/test-prep/mcat/cells/eukaryotic-cells/the-nucleus/", "keywords": "", "id": "gGeC0ntvxR8", "title": "The nucleus", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gGeC0ntvxR8.mp4/gGeC0ntvxR8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gGeC0ntvxR8.mp4/gGeC0ntvxR8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gGeC0ntvxR8.m3u8/gGeC0ntvxR8.m3u8"}, "slug": "the-nucleus", "video_id": "gGeC0ntvxR8", "youtube_id": "gGeC0ntvxR8", "readable_id": "the-nucleus"}, "p5nomPfUF9k": {"duration": 148, "path": "khan/math/pre-algebra/rates-and-ratios/ratios_and_proportions/simplifying-rates-and-ratios/", "keywords": "U04_L1_T1_we2, Simplifying, Rates, and, Ratios, CC_6_RP_1", "id": "p5nomPfUF9k", "title": "Simplifying rates and ratios", "description": "Simplifying Rates and Ratios", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p5nomPfUF9k.mp4/p5nomPfUF9k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p5nomPfUF9k.mp4/p5nomPfUF9k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p5nomPfUF9k.m3u8/p5nomPfUF9k.m3u8"}, "slug": "simplifying-rates-and-ratios", "video_id": "p5nomPfUF9k", "youtube_id": "p5nomPfUF9k", "readable_id": "simplifying-rates-and-ratios"}, "__afuK1CMpQ": {"duration": 840, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-muscle-contraction/heart-cells-up-close/", "keywords": "", "id": "__afuK1CMpQ", "title": "Heart cells up close!", "description": "Get a close-up view of the cardiac cells and see what makes them different from the other (skeletal and smooth) muscle cells. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/__afuK1CMpQ.mp4/__afuK1CMpQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/__afuK1CMpQ.mp4/__afuK1CMpQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/__afuK1CMpQ.m3u8/__afuK1CMpQ.m3u8"}, "slug": "heart-cells-up-close", "video_id": "__afuK1CMpQ", "youtube_id": "__afuK1CMpQ", "readable_id": "heart-cells-up-close"}, "zpzM3Xun6-Q": {"duration": 66, "path": "khan/partner-content/exploratorium/light-and-color/colored-shadows/colored-shadows-yellow-and-cyan/", "keywords": "", "id": "zpzM3Xun6-Q", "title": "Yellow and cyan challenge", "description": "Now that we understand how the magenta shadow is produced, what about the other colors we see?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zpzM3Xun6-Q.mp4/zpzM3Xun6-Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zpzM3Xun6-Q.mp4/zpzM3Xun6-Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zpzM3Xun6-Q.m3u8/zpzM3Xun6-Q.m3u8"}, "slug": "colored-shadows-yellow-and-cyan", "video_id": "zpzM3Xun6-Q", "youtube_id": "zpzM3Xun6-Q", "readable_id": "colored-shadows-yellow-and-cyan"}, "q3g3jsmCOEQ": {"duration": 562, "path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/dipole-moment/", "keywords": "", "id": "q3g3jsmCOEQ", "title": "Dipole moment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q3g3jsmCOEQ.mp4/q3g3jsmCOEQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q3g3jsmCOEQ.mp4/q3g3jsmCOEQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q3g3jsmCOEQ.m3u8/q3g3jsmCOEQ.m3u8"}, "slug": "dipole-moment", "video_id": "q3g3jsmCOEQ", "youtube_id": "q3g3jsmCOEQ", "readable_id": "dipole-moment"}, "pZOUV_rTyj0": {"duration": 457, "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-egypt-ap/mortuary-temple-of-hatshepsut-and-large-kneeling-statue-new-kingdom-egypt/", "keywords": "Egypt", "id": "pZOUV_rTyj0", "title": "Mortuary Temple of Hatshepsut and Large Kneeling Statue, New Kingdom, Egypt", "description": "Mortuary Temple and Large Kneeling Statue of Hatshepsut, c. 1479-58 B.C.E., New Kingdom, Egypt. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pZOUV_rTyj0.mp4/pZOUV_rTyj0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pZOUV_rTyj0.mp4/pZOUV_rTyj0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pZOUV_rTyj0.m3u8/pZOUV_rTyj0.m3u8"}, "slug": "mortuary-temple-of-hatshepsut-and-large-kneeling-statue-new-kingdom-egypt", "video_id": "pZOUV_rTyj0", "youtube_id": "pZOUV_rTyj0", "readable_id": "mortuary-temple-of-hatshepsut-and-large-kneeling-statue-new-kingdom-egypt"}, "TiXusw8aPMk": {"duration": 645, "path": "khan/humanities/history/crashcourse-worldhistory/road-trip-conquest-trade-2/crash-course-world-history-17/", "keywords": "crash course", "id": "TiXusw8aPMk", "title": "Wait for it... the Mongols!", "description": "In which John Green teaches you, at long last, about the most exceptional bunch of empire-building nomads in the history of the world, the Mongols! How did the Mongols go from being a relatively small band of herders who occasionally engaged in some light hunting-gathering to being one of the most formidable fighting forces in the world? It turns out Genghis Khan was a pretty big part of it, but you probably already knew that. The more interesting questions might be, what kind of rulers were they, and what effect did their empire have on the world we know today? Find out, as John FINALLY teaches you about the Mongols.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TiXusw8aPMk.mp4/TiXusw8aPMk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TiXusw8aPMk.mp4/TiXusw8aPMk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TiXusw8aPMk.m3u8/TiXusw8aPMk.m3u8"}, "slug": "crash-course-world-history-17", "video_id": "TiXusw8aPMk", "youtube_id": "TiXusw8aPMk", "readable_id": "crash-course-world-history-17"}, "ZrKw-SLzNrw": {"duration": 555, "path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/more-on-quantitative-easing-and-credit-easing/", "keywords": "federal, reserve, bernanke, credit, crisis", "id": "ZrKw-SLzNrw", "title": "More on quantitative easing (and credit easing)", "description": "Understanding the difference between quantitative easing in Japan and the United States", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZrKw-SLzNrw.mp4/ZrKw-SLzNrw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZrKw-SLzNrw.mp4/ZrKw-SLzNrw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZrKw-SLzNrw.m3u8/ZrKw-SLzNrw.m3u8"}, "slug": "more-on-quantitative-easing-and-credit-easing", "video_id": "ZrKw-SLzNrw", "youtube_id": "ZrKw-SLzNrw", "readable_id": "more-on-quantitative-easing-and-credit-easing"}, "1_ZAunahU7c": {"duration": 175, "path": "khan/humanities/renaissance-reformation/northern-renaissance1/reliquaries-manuscripts-tapestries/boy-genius/", "keywords": "belief, book, ornate, painting, transcendence, vellum, Europe", "id": "1_ZAunahU7c", "title": "Herman, Paul, and Jean de Limbourg, The Belles Heures of Jean de France, Duc de Berry", "description": "Met curator Timothy B. Husband on prodigy in Herman, Paul, and Jean de Limbourg\u2019s The Belles Heures of Jean de France, Duc de Berry,\u00a01405\u20131408/1409.\n\nCompleted by late 1408 or early 1409, probably in Paris, \"The Belles Heures,\" a private devotional book, was the first of two sumptuous manuscripts commissioned by the duke of Berry from the Limbourg brothers, Pol, Jean, and Herman. It is the only manuscript that they completed in its entirety. The other manuscript, \"The Tr\u00e8s Riches Heures,\" was left incomplete at the brothers' deaths in 1416. The richly illustrated text is amplified by unusual cycles reflecting the duke's personal interests. Using a luminous palette, the artists blended an intimate Northern vision of nature with Italianate modes of figural articulation. The keen interest in the natural world and the naturalistic means of representing it, so striking in ninety-four full-page and fifty-four column illuminations, foreshadow the work of Jan van Eyck and the ensuing generations of outstanding fifteenth-century painters in the South Netherlands.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1_ZAunahU7c.mp4/1_ZAunahU7c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1_ZAunahU7c.mp4/1_ZAunahU7c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1_ZAunahU7c.m3u8/1_ZAunahU7c.m3u8"}, "slug": "boy-genius", "video_id": "1_ZAunahU7c", "youtube_id": "1_ZAunahU7c", "readable_id": "boy-genius"}, "EsQyCHs4IBY": {"duration": 589, "path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/clonal-selection/", "keywords": "", "id": "EsQyCHs4IBY", "title": "Clonal selection", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EsQyCHs4IBY.mp4/EsQyCHs4IBY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EsQyCHs4IBY.mp4/EsQyCHs4IBY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EsQyCHs4IBY.m3u8/EsQyCHs4IBY.m3u8"}, "slug": "clonal-selection", "video_id": "EsQyCHs4IBY", "youtube_id": "EsQyCHs4IBY", "readable_id": "clonal-selection"}, "nFsQA2Zvy1o": {"duration": 304, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/greater-than-less-than/greater-than-and-less-than-symbols/", "keywords": "", "id": "nFsQA2Zvy1o", "title": "Greater than and less than symbols", "description": "Learn the greater than symbol \">\" and the less than symbol \"<\".", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nFsQA2Zvy1o.mp4/nFsQA2Zvy1o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nFsQA2Zvy1o.mp4/nFsQA2Zvy1o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nFsQA2Zvy1o.m3u8/nFsQA2Zvy1o.m3u8"}, "slug": "greater-than-and-less-than-symbols", "video_id": "nFsQA2Zvy1o", "youtube_id": "nFsQA2Zvy1o", "readable_id": "greater-than-and-less-than-symbols"}, "cu6rfyEMFiQ": {"duration": 371, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-cystic-fibrosis/cystic-fibrosis-pathophysiology/", "keywords": "", "id": "cu6rfyEMFiQ", "title": "Cystic fibrosis pathophysiology", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cu6rfyEMFiQ.mp4/cu6rfyEMFiQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cu6rfyEMFiQ.mp4/cu6rfyEMFiQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cu6rfyEMFiQ.m3u8/cu6rfyEMFiQ.m3u8"}, "slug": "cystic-fibrosis-pathophysiology", "video_id": "cu6rfyEMFiQ", "youtube_id": "cu6rfyEMFiQ", "readable_id": "cystic-fibrosis-pathophysiology"}, "tTF5ZY6aitg": {"duration": 232, "path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/exekias-dionysos-kylix/", "keywords": "exekias, ancient greece, archaic, vase painting,", "id": "tTF5ZY6aitg", "title": "Attic Black-Figure: Exekias, Dionysos Kylix", "description": "Exekias, Dionysos Kylix, c. 530 B.C.E. (Antikensammlungen, Munich)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tTF5ZY6aitg.mp4/tTF5ZY6aitg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tTF5ZY6aitg.mp4/tTF5ZY6aitg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tTF5ZY6aitg.m3u8/tTF5ZY6aitg.m3u8"}, "slug": "exekias-dionysos-kylix", "video_id": "tTF5ZY6aitg", "youtube_id": "tTF5ZY6aitg", "readable_id": "exekias-dionysos-kylix"}, "edVnqL2Z59A": {"duration": 122, "path": "khan/math/algebra/introduction-to-algebra/writing-expressions-tutorial/interpreting-linear-expressions-example-2/", "keywords": "", "id": "edVnqL2Z59A", "title": "Interpreting linear expressions, 2", "description": "Let's practice matching expressions to their meaning in this example of interpreting linear expressions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/edVnqL2Z59A.mp4/edVnqL2Z59A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/edVnqL2Z59A.mp4/edVnqL2Z59A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/edVnqL2Z59A.m3u8/edVnqL2Z59A.m3u8"}, "slug": "interpreting-linear-expressions-example-2", "video_id": "edVnqL2Z59A", "youtube_id": "edVnqL2Z59A", "readable_id": "interpreting-linear-expressions-example-2"}, "OS1g4PDdNdM": {"duration": 74, "path": "khan/math/algebra-basics/core-algebra-foundations/algebra-foundations-decimal-operations/converting-decimals-to-fractions-1-ex-3/", "keywords": "Converting, decimals, to, fractions, 1, ex, 3", "id": "OS1g4PDdNdM", "title": "Converting decimals to fractions example 3", "description": "Learn how to write 0.36 as a fraction.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OS1g4PDdNdM.mp4/OS1g4PDdNdM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OS1g4PDdNdM.mp4/OS1g4PDdNdM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OS1g4PDdNdM.m3u8/OS1g4PDdNdM.m3u8"}, "slug": "converting-decimals-to-fractions-1-ex-3", "video_id": "OS1g4PDdNdM", "youtube_id": "OS1g4PDdNdM", "readable_id": "converting-decimals-to-fractions-1-ex-3"}, "o52BW3B4efc": {"duration": 487, "path": "khan/test-prep/mcat/physical-processes/gas-phase/charles-law/", "keywords": "", "id": "o52BW3B4efc", "title": "Charles's law", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o52BW3B4efc.mp4/o52BW3B4efc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o52BW3B4efc.mp4/o52BW3B4efc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o52BW3B4efc.m3u8/o52BW3B4efc.m3u8"}, "slug": "charles-law", "video_id": "o52BW3B4efc", "youtube_id": "o52BW3B4efc", "readable_id": "charles-law"}, "KIvBn6gfRgY": {"duration": 262, "path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/central-dogma-of-molecular-biology-2/", "keywords": "", "id": "KIvBn6gfRgY", "title": "Central dogma of molecular biology", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KIvBn6gfRgY.mp4/KIvBn6gfRgY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KIvBn6gfRgY.mp4/KIvBn6gfRgY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KIvBn6gfRgY.m3u8/KIvBn6gfRgY.m3u8"}, "slug": "central-dogma-of-molecular-biology-2", "video_id": "KIvBn6gfRgY", "youtube_id": "KIvBn6gfRgY", "readable_id": "central-dogma-of-molecular-biology-2"}, "QxbJsg-Vdms": {"duration": 348, "path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/indefinite-integrals-of-x-raised-to-a-power/", "keywords": "", "id": "QxbJsg-Vdms", "title": "Indefinite integrals of x raised to a power", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QxbJsg-Vdms.mp4/QxbJsg-Vdms.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QxbJsg-Vdms.mp4/QxbJsg-Vdms.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QxbJsg-Vdms.m3u8/QxbJsg-Vdms.m3u8"}, "slug": "indefinite-integrals-of-x-raised-to-a-power", "video_id": "QxbJsg-Vdms", "youtube_id": "QxbJsg-Vdms", "readable_id": "indefinite-integrals-of-x-raised-to-a-power"}, "rK4sXm_MPWo": {"duration": 347, "path": "khan/math/algebra-basics/core-algebra-foundations/core-algebra-foundations-negative-numbers/why-a-negative-times-a-negative-is-a-positive/", "keywords": "math, negative, numbers, marquee", "id": "rK4sXm_MPWo", "title": "Why a negative times a negative is a positive", "description": "Use the distributive property to understand the products of negative numbers.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rK4sXm_MPWo.mp4/rK4sXm_MPWo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rK4sXm_MPWo.mp4/rK4sXm_MPWo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rK4sXm_MPWo.m3u8/rK4sXm_MPWo.m3u8"}, "slug": "why-a-negative-times-a-negative-is-a-positive", "video_id": "rK4sXm_MPWo", "youtube_id": "rK4sXm_MPWo", "readable_id": "why-a-negative-times-a-negative-is-a-positive"}, "NJRyxmommqQ": {"duration": 565, "path": "khan/math/algebra/systems-of-linear-equations/possible-number-of-solutions-of-systems-of-linear-equations/inconsistent-systems-of-equations/", "keywords": "", "id": "NJRyxmommqQ", "title": "Arbegla's inconsistent system of equations", "description": "Sal gives an example of a system of equations that has no solution!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NJRyxmommqQ.mp4/NJRyxmommqQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NJRyxmommqQ.mp4/NJRyxmommqQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NJRyxmommqQ.m3u8/NJRyxmommqQ.m3u8"}, "slug": "inconsistent-systems-of-equations", "video_id": "NJRyxmommqQ", "youtube_id": "NJRyxmommqQ", "readable_id": "inconsistent-systems-of-equations"}, "j7ley8tRBd0": {"duration": 153, "path": "khan/partner-content/pixar/crowds/crowds2/combinatorics9/", "keywords": "", "id": "j7ley8tRBd0", "title": "4. Casting problem", "description": "Now it's time for a really meaty problem! How can we count the number of possible casts when given a large set of robots to choose from?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/j7ley8tRBd0.mp4/j7ley8tRBd0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/j7ley8tRBd0.mp4/j7ley8tRBd0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/j7ley8tRBd0.m3u8/j7ley8tRBd0.m3u8"}, "slug": "combinatorics9", "video_id": "j7ley8tRBd0", "youtube_id": "j7ley8tRBd0", "readable_id": "combinatorics9"}, "e3lRt9XdV0s": {"duration": 307, "path": "khan/test-prep/mcat/chemical-processes/separations-purifications/thin-layer-chromatography/", "keywords": "thin layer chromatography", "id": "e3lRt9XdV0s", "title": "Thin layer chromatography (TLC)", "description": "Learn about how chemicals can be separated based on polarity through thin layer chromatography (TLC). By Angela Guerrero.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e3lRt9XdV0s.mp4/e3lRt9XdV0s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e3lRt9XdV0s.mp4/e3lRt9XdV0s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e3lRt9XdV0s.m3u8/e3lRt9XdV0s.m3u8"}, "slug": "thin-layer-chromatography", "video_id": "e3lRt9XdV0s", "youtube_id": "e3lRt9XdV0s", "readable_id": "thin-layer-chromatography"}, "2DmYxB97KQ0": {"duration": 217, "path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/comparing-colleges-location-size-housing/", "keywords": "", "id": "2DmYxB97KQ0", "title": "Comparing colleges based on location, size, and housing", "description": "Filter by location, size, and housing options using College Board's college search tool", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2DmYxB97KQ0.mp4/2DmYxB97KQ0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2DmYxB97KQ0.mp4/2DmYxB97KQ0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2DmYxB97KQ0.m3u8/2DmYxB97KQ0.m3u8"}, "slug": "comparing-colleges-location-size-housing", "video_id": "2DmYxB97KQ0", "youtube_id": "2DmYxB97KQ0", "readable_id": "comparing-colleges-location-size-housing"}, "8TIben0bJpU": {"duration": 600, "path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/getting-exactly-two-heads-combinatorics/", "keywords": "probability, combinatorics", "id": "8TIben0bJpU", "title": "Getting exactly two heads (combinatorics)", "description": "A different way to think about the probability of getting 2 heads in 4 flips", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8TIben0bJpU.mp4/8TIben0bJpU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8TIben0bJpU.mp4/8TIben0bJpU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8TIben0bJpU.m3u8/8TIben0bJpU.m3u8"}, "slug": "getting-exactly-two-heads-combinatorics", "video_id": "8TIben0bJpU", "youtube_id": "8TIben0bJpU", "readable_id": "getting-exactly-two-heads-combinatorics"}, "ViqrHGae7FA": {"duration": 511, "path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/generalizing-a-left-riemann-sum-with-equally-spaced-rectangles/", "keywords": "", "id": "ViqrHGae7FA", "title": "Generalizing a left Riemann sum with equally spaced rectangles", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ViqrHGae7FA.mp4/ViqrHGae7FA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ViqrHGae7FA.mp4/ViqrHGae7FA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ViqrHGae7FA.m3u8/ViqrHGae7FA.m3u8"}, "slug": "generalizing-a-left-riemann-sum-with-equally-spaced-rectangles", "video_id": "ViqrHGae7FA", "youtube_id": "ViqrHGae7FA", "readable_id": "generalizing-a-left-riemann-sum-with-equally-spaced-rectangles"}, "sZMezOCZr40": {"duration": 330, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons/scalene-isosceles-equilateral-from-angle/", "keywords": "", "id": "sZMezOCZr40", "title": "Triangles: using angles to categorize", "description": "You say you can't categorize a triangle because you don't know the length of the sides. Guess what? If you know the size of the angles you can!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sZMezOCZr40.mp4/sZMezOCZr40.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sZMezOCZr40.mp4/sZMezOCZr40.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sZMezOCZr40.m3u8/sZMezOCZr40.m3u8"}, "slug": "scalene-isosceles-equilateral-from-angle", "video_id": "sZMezOCZr40", "youtube_id": "sZMezOCZr40", "readable_id": "scalene-isosceles-equilateral-from-angle"}, "4xfOq00BzJA": {"duration": 416, "path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/vi-and-sal-explore-how-we-think-about-scale/", "keywords": "logarithmic, scale, logarithm, vi, hart", "id": "4xfOq00BzJA", "title": "Vi and Sal explore how we think about scale", "description": "Vi Hart (http://www.youtube.com/vihart) and Sal talk about how we humans perceive things nonlinearly", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4xfOq00BzJA.mp4/4xfOq00BzJA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4xfOq00BzJA.mp4/4xfOq00BzJA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4xfOq00BzJA.m3u8/4xfOq00BzJA.m3u8"}, "slug": "vi-and-sal-explore-how-we-think-about-scale", "video_id": "4xfOq00BzJA", "youtube_id": "4xfOq00BzJA", "readable_id": "vi-and-sal-explore-how-we-think-about-scale"}, "9fiJ7mSzamw": {"duration": 223, "path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/gerard-david-the-virgin-and-child-with-saints-and-donor-c-1510/", "keywords": "Gerard David Madonna, Saints, Art History, Renaissance, Flanders, Flemish, Northern Renaissance, Bruges, National Gallery, London, Khan Academy, smarthistory, OER", "id": "9fiJ7mSzamw", "title": "David, the Virgin and Child with Saints and Donor", "description": "Gerard David, The Virgin and Child with Saints and Donor, c. 1510, oil on oak, 105.80 x 144.40 cm (The National Gallery, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9fiJ7mSzamw.mp4/9fiJ7mSzamw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9fiJ7mSzamw.mp4/9fiJ7mSzamw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9fiJ7mSzamw.m3u8/9fiJ7mSzamw.m3u8"}, "slug": "gerard-david-the-virgin-and-child-with-saints-and-donor-c-1510", "video_id": "9fiJ7mSzamw", "youtube_id": "9fiJ7mSzamw", "readable_id": "gerard-david-the-virgin-and-child-with-saints-and-donor-c-1510"}, "o0azgDKAFNI": {"duration": 650, "path": "khan/test-prep/gmat/problem-solving/gmat-math-45/", "keywords": "gmat, math, problem, solving", "id": "o0azgDKAFNI", "title": "GMAT: Math 45", "description": "214-216, pg. 181", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o0azgDKAFNI.mp4/o0azgDKAFNI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o0azgDKAFNI.mp4/o0azgDKAFNI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o0azgDKAFNI.m3u8/o0azgDKAFNI.m3u8"}, "slug": "gmat-math-45", "video_id": "o0azgDKAFNI", "youtube_id": "o0azgDKAFNI", "readable_id": "gmat-math-45"}, "zfZu--psur8": {"duration": 595, "path": "khan/humanities/art-1010/early-abstraction/expressionism1/ernst-ludwig-kirchner-street-dresden-1908/", "keywords": "German art, Smarthistory", "id": "zfZu--psur8", "title": "Kirchner, Street, Dresden", "description": "Ernst Ludwig Kirchner, Street, Dresden, oil on canvas, 1908 (MoMA)\n\nSpeakers: Dr. Juliana Kreinik, Dr. Steven Zucker, Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zfZu--psur8.mp4/zfZu--psur8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zfZu--psur8.mp4/zfZu--psur8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zfZu--psur8.m3u8/zfZu--psur8.m3u8"}, "slug": "ernst-ludwig-kirchner-street-dresden-1908", "video_id": "zfZu--psur8", "youtube_id": "zfZu--psur8", "readable_id": "ernst-ludwig-kirchner-street-dresden-1908"}, "sPz5RrFus1Q": {"duration": 938, "path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/proof-s-or-entropy-is-a-valid-state-variable/", "keywords": "entropy, internal, energy, heat, thermodynamics", "id": "sPz5RrFus1Q", "title": "Proof: S (or entropy) is a valid state variable", "description": "Proof that S (or entropy) is a valid state variable.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sPz5RrFus1Q.mp4/sPz5RrFus1Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sPz5RrFus1Q.mp4/sPz5RrFus1Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sPz5RrFus1Q.m3u8/sPz5RrFus1Q.m3u8"}, "slug": "proof-s-or-entropy-is-a-valid-state-variable", "video_id": "sPz5RrFus1Q", "youtube_id": "sPz5RrFus1Q", "readable_id": "proof-s-or-entropy-is-a-valid-state-variable"}, "_npwsLh0vws": {"duration": 100, "path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/recognizing-functions-example-2/", "keywords": "", "id": "_npwsLh0vws", "title": "Does a vertical line represent a function?", "description": "Sal explains why a vertical line *doesn't* represent a function.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_npwsLh0vws.mp4/_npwsLh0vws.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_npwsLh0vws.mp4/_npwsLh0vws.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_npwsLh0vws.m3u8/_npwsLh0vws.m3u8"}, "slug": "recognizing-functions-example-2", "video_id": "_npwsLh0vws", "youtube_id": "_npwsLh0vws", "readable_id": "recognizing-functions-example-2"}, "nv2kfBFkv4s": {"duration": 506, "path": "khan/science/biology/macromolecules/proteins-and-amino-acids/peptide-bond-formation/", "keywords": "education,online learning,learning,lessons,peptide,amino acid,zwitterion,condensation reaction", "id": "nv2kfBFkv4s", "title": "Peptide bond formation", "description": "How amino acids (including ones in zwitterion form) form peptide bonds (peptide linkages) through a condensation reaction (dehydration synthesis).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nv2kfBFkv4s.mp4/nv2kfBFkv4s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nv2kfBFkv4s.mp4/nv2kfBFkv4s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nv2kfBFkv4s.m3u8/nv2kfBFkv4s.m3u8"}, "slug": "peptide-bond-formation", "video_id": "nv2kfBFkv4s", "youtube_id": "nv2kfBFkv4s", "readable_id": "peptide-bond-formation"}, "A5r7wkwDID4": {"duration": 520, "path": "khan/science/organic-chemistry/aromatic-compounds/naming-aromatic/naming-benzene-derivatives-introduction/", "keywords": "benzene, toluene, phenol, aniline, benzoic, acid, benzaldehyde", "id": "A5r7wkwDID4", "title": "Naming benzene derivatives introduction", "description": "Naming Benzene Derivatives Introduction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/A5r7wkwDID4.mp4/A5r7wkwDID4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/A5r7wkwDID4.mp4/A5r7wkwDID4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/A5r7wkwDID4.m3u8/A5r7wkwDID4.m3u8"}, "slug": "naming-benzene-derivatives-introduction", "video_id": "A5r7wkwDID4", "youtube_id": "A5r7wkwDID4", "readable_id": "naming-benzene-derivatives-introduction"}, "YtvL-LQlPrU": {"duration": 511, "path": "khan/test-prep/mcat/cells/cellular-development/cellular-specialization-differentiation/", "keywords": "", "id": "YtvL-LQlPrU", "title": "Cellular specialization (differentiation)", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YtvL-LQlPrU.mp4/YtvL-LQlPrU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YtvL-LQlPrU.mp4/YtvL-LQlPrU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YtvL-LQlPrU.m3u8/YtvL-LQlPrU.m3u8"}, "slug": "cellular-specialization-differentiation", "video_id": "YtvL-LQlPrU", "youtube_id": "YtvL-LQlPrU", "readable_id": "cellular-specialization-differentiation"}, "CDmJL-VNlaM": {"duration": 391, "path": "khan/math/differential-calculus/derivative_applications/local-linearization/local-linearization-example/", "keywords": "", "id": "CDmJL-VNlaM", "title": "Local linearization example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CDmJL-VNlaM.mp4/CDmJL-VNlaM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CDmJL-VNlaM.mp4/CDmJL-VNlaM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CDmJL-VNlaM.m3u8/CDmJL-VNlaM.m3u8"}, "slug": "local-linearization-example", "video_id": "CDmJL-VNlaM", "youtube_id": "CDmJL-VNlaM", "readable_id": "local-linearization-example"}, "-Jx6vyc_830": {"duration": 621, "path": "khan/test-prep/gmat/problem-solving/gmat-math-20/", "keywords": "GMAT, Math, problem, solving", "id": "-Jx6vyc_830", "title": "GMAT: Math 20", "description": "106-109, pg. 166", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-Jx6vyc_830.mp4/-Jx6vyc_830.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-Jx6vyc_830.mp4/-Jx6vyc_830.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-Jx6vyc_830.m3u8/-Jx6vyc_830.m3u8"}, "slug": "gmat-math-20", "video_id": "-Jx6vyc_830", "youtube_id": "-Jx6vyc_830", "readable_id": "gmat-math-20"}, "KNrEAJeRIdo": {"duration": 256, "path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/geometric-series-convergence-divergence/", "keywords": "", "id": "KNrEAJeRIdo", "title": "Geometric series convergence and divergence examples", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KNrEAJeRIdo.mp4/KNrEAJeRIdo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KNrEAJeRIdo.mp4/KNrEAJeRIdo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KNrEAJeRIdo.m3u8/KNrEAJeRIdo.m3u8"}, "slug": "geometric-series-convergence-divergence", "video_id": "KNrEAJeRIdo", "youtube_id": "KNrEAJeRIdo", "readable_id": "geometric-series-convergence-divergence"}, "H1H0xmjZMPA": {"duration": 270, "path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/comparing-features-of-functions-2-example-3/", "keywords": "", "id": "H1H0xmjZMPA", "title": "Comparing features of functions (example 3)", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H1H0xmjZMPA.mp4/H1H0xmjZMPA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H1H0xmjZMPA.mp4/H1H0xmjZMPA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H1H0xmjZMPA.m3u8/H1H0xmjZMPA.m3u8"}, "slug": "comparing-features-of-functions-2-example-3", "video_id": "H1H0xmjZMPA", "youtube_id": "H1H0xmjZMPA", "readable_id": "comparing-features-of-functions-2-example-3"}, "5BEaqN92vDk": {"duration": 589, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-31/", "keywords": "gmat, data, sufficiency, math", "id": "5BEaqN92vDk", "title": "GMAT: Data sufficiency 31", "description": "125-128, pg. 288", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5BEaqN92vDk.mp4/5BEaqN92vDk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5BEaqN92vDk.mp4/5BEaqN92vDk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5BEaqN92vDk.m3u8/5BEaqN92vDk.m3u8"}, "slug": "gmat-data-sufficiency-31", "video_id": "5BEaqN92vDk", "youtube_id": "5BEaqN92vDk", "readable_id": "gmat-data-sufficiency-31"}, "7uFbPec0tR4": {"duration": 220, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/marc-ecko/kauffman-marc-ecko1/", "keywords": "", "id": "7uFbPec0tR4", "title": "Marc Ecko - Founder of Ecko Unlimited", "description": "Marc Ecko, Founder of Ecko Unlimited, discusses his origins as an entrepreneur and the entrepreneurial culture of Hip Hop. Describing graffiti as the extreme sport of art, Marc talks about how this form of artistic expression was his gateway to entrepreneurship and offers advice to young people.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7uFbPec0tR4.mp4/7uFbPec0tR4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7uFbPec0tR4.mp4/7uFbPec0tR4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7uFbPec0tR4.m3u8/7uFbPec0tR4.m3u8"}, "slug": "kauffman-marc-ecko1", "video_id": "7uFbPec0tR4", "youtube_id": "7uFbPec0tR4", "readable_id": "kauffman-marc-ecko1"}, "KkaU2ur3Ymw": {"duration": 584, "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/review-and-intuition-why-we-divide-by-n-1-for-the-unbiased-sample-variance/", "keywords": "intuition, unbiased estimator, sample variance, statistics", "id": "KkaU2ur3Ymw", "title": "Review and intuition why we divide by n-1 for the unbiased sample variance", "description": "Reviewing the population mean, sample mean, population variance, sample variance and building an intuition for why we divide by n-1 for the unbiased sample variance", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KkaU2ur3Ymw.mp4/KkaU2ur3Ymw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KkaU2ur3Ymw.mp4/KkaU2ur3Ymw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KkaU2ur3Ymw.m3u8/KkaU2ur3Ymw.m3u8"}, "slug": "review-and-intuition-why-we-divide-by-n-1-for-the-unbiased-sample-variance", "video_id": "KkaU2ur3Ymw", "youtube_id": "KkaU2ur3Ymw", "readable_id": "review-and-intuition-why-we-divide-by-n-1-for-the-unbiased-sample-variance"}, "VymVIXcyErI": {"duration": 772, "path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/ir-signals-for-carbonyl-compounds/", "keywords": "", "id": "VymVIXcyErI", "title": "IR signals for carbonyl compounds", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VymVIXcyErI.mp4/VymVIXcyErI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VymVIXcyErI.mp4/VymVIXcyErI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VymVIXcyErI.m3u8/VymVIXcyErI.m3u8"}, "slug": "ir-signals-for-carbonyl-compounds", "video_id": "VymVIXcyErI", "youtube_id": "VymVIXcyErI", "readable_id": "ir-signals-for-carbonyl-compounds"}, "X3QUqRd18jc": {"duration": 373, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/iron-deficiency-and-anemia-of-chronic-disease-treatment/", "keywords": "", "id": "X3QUqRd18jc", "title": "Iron deficiency and anemia of chronic disease treatment", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/X3QUqRd18jc.mp4/X3QUqRd18jc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/X3QUqRd18jc.mp4/X3QUqRd18jc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/X3QUqRd18jc.m3u8/X3QUqRd18jc.m3u8"}, "slug": "iron-deficiency-and-anemia-of-chronic-disease-treatment", "video_id": "X3QUqRd18jc", "youtube_id": "X3QUqRd18jc", "readable_id": "iron-deficiency-and-anemia-of-chronic-disease-treatment"}, "GHDrDdu6vrU": {"duration": 714, "path": "khan/math/algebra/quadratics/quadratic_odds_ends/algebra-ii-quadratics-and-shifts/", "keywords": "algebra, caslifornia, standards, quadratic, graph, shift", "id": "GHDrDdu6vrU", "title": "Algebra II: Quadratics and shifts", "description": "32-35, Solving quadratics and graph shifts", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GHDrDdu6vrU.mp4/GHDrDdu6vrU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GHDrDdu6vrU.mp4/GHDrDdu6vrU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GHDrDdu6vrU.m3u8/GHDrDdu6vrU.m3u8"}, "slug": "algebra-ii-quadratics-and-shifts", "video_id": "GHDrDdu6vrU", "youtube_id": "GHDrDdu6vrU", "readable_id": "algebra-ii-quadratics-and-shifts"}, "iATjsfAX8yc": {"duration": 332, "path": "khan/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/distance-between-a-point-and-a-line/", "keywords": "", "id": "iATjsfAX8yc", "title": "Distance between a point and a line", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iATjsfAX8yc.mp4/iATjsfAX8yc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iATjsfAX8yc.mp4/iATjsfAX8yc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iATjsfAX8yc.m3u8/iATjsfAX8yc.m3u8"}, "slug": "distance-between-a-point-and-a-line", "video_id": "iATjsfAX8yc", "youtube_id": "iATjsfAX8yc", "readable_id": "distance-between-a-point-and-a-line"}, "F7r7l1VG-Tw": {"duration": 667, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-4-multiplier-effect-and-the-money-supply/", "keywords": "money, multiplier, m0, m1, supply, banking, fed, reserve", "id": "F7r7l1VG-Tw", "title": "Banking 4: Multiplier effect and the money supply", "description": "How \"money\" is created in a fractional reserve banking system. M0 and M1 definitions of the money suppy. The multiplier effect.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/F7r7l1VG-Tw.mp4/F7r7l1VG-Tw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/F7r7l1VG-Tw.mp4/F7r7l1VG-Tw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/F7r7l1VG-Tw.m3u8/F7r7l1VG-Tw.m3u8"}, "slug": "banking-4-multiplier-effect-and-the-money-supply", "video_id": "F7r7l1VG-Tw", "youtube_id": "F7r7l1VG-Tw", "readable_id": "banking-4-multiplier-effect-and-the-money-supply"}, "XiAoUDfrar0": {"duration": 443, "path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/introduction-to-transformations/", "keywords": "", "id": "XiAoUDfrar0", "title": "Introduction to geometric transformations", "description": "Sal introduces geometric transformations! Specifically, he explains what the \"image\" of a transformations is, what are the \"rigid\" transformations, and which transformations are not rigid.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XiAoUDfrar0.mp4/XiAoUDfrar0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XiAoUDfrar0.mp4/XiAoUDfrar0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XiAoUDfrar0.m3u8/XiAoUDfrar0.m3u8"}, "slug": "introduction-to-transformations", "video_id": "XiAoUDfrar0", "youtube_id": "XiAoUDfrar0", "readable_id": "introduction-to-transformations"}, "sPPjk4aXzmQ": {"duration": 455, "path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/antiderivative-of-x-1/", "keywords": "", "id": "sPPjk4aXzmQ", "title": "Antiderivative of x^-1", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sPPjk4aXzmQ.mp4/sPPjk4aXzmQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sPPjk4aXzmQ.mp4/sPPjk4aXzmQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sPPjk4aXzmQ.m3u8/sPPjk4aXzmQ.m3u8"}, "slug": "antiderivative-of-x-1", "video_id": "sPPjk4aXzmQ", "youtube_id": "sPPjk4aXzmQ", "readable_id": "antiderivative-of-x-1"}, "PIM4G3IZk5Y": {"duration": 645, "path": "khan/test-prep/mcat/physical-processes/gas-phase/boyles-law/", "keywords": "", "id": "PIM4G3IZk5Y", "title": "Boyle's law", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PIM4G3IZk5Y.mp4/PIM4G3IZk5Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PIM4G3IZk5Y.mp4/PIM4G3IZk5Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PIM4G3IZk5Y.m3u8/PIM4G3IZk5Y.m3u8"}, "slug": "boyles-law", "video_id": "PIM4G3IZk5Y", "youtube_id": "PIM4G3IZk5Y", "readable_id": "boyles-law"}, "bS6EmYzpou4": {"duration": 159, "path": "khan/math/arithmetic/multiplication-division/mult-div-word-problems/multiplying-whole-numbers-and-applications-6/", "keywords": "U01_L3_T1_we6, Multiplying, Whole, Numbers, and, Applications", "id": "bS6EmYzpou4", "title": "Comparing with multiplication: age", "description": "Multiplication helps us compare ages. Hint: learn those multiplication tables. They really help on problems like these.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bS6EmYzpou4.mp4/bS6EmYzpou4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bS6EmYzpou4.mp4/bS6EmYzpou4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bS6EmYzpou4.m3u8/bS6EmYzpou4.m3u8"}, "slug": "multiplying-whole-numbers-and-applications-6", "video_id": "bS6EmYzpou4", "youtube_id": "bS6EmYzpou4", "readable_id": "multiplying-whole-numbers-and-applications-6"}, "W1caxQHNYuc": {"duration": 471, "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-learning-motives/sscc-blended-moves1/", "keywords": "", "id": "W1caxQHNYuc", "title": "Part 1: Tips from blended-learning teachers about the structures and systems that make blended work", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/W1caxQHNYuc.mp4/W1caxQHNYuc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/W1caxQHNYuc.mp4/W1caxQHNYuc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/W1caxQHNYuc.m3u8/W1caxQHNYuc.m3u8"}, "slug": "sscc-blended-moves1", "video_id": "W1caxQHNYuc", "youtube_id": "W1caxQHNYuc", "readable_id": "sscc-blended-moves1"}, "HGb9m1dbNdM": {"duration": 541, "path": "khan/science/health-and-medicine/infectious-diseases/influenza/vaccines-and-the-autism-myth-part-2/", "keywords": "", "id": "HGb9m1dbNdM", "title": "Vaccines and the autism myth - part 2", "description": "The infamous Wakefield study kickstarted the Autism Myth, but many studies have since shown that there is no link between the MMR Vaccine and autism. Find out how it all got started. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HGb9m1dbNdM.mp4/HGb9m1dbNdM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HGb9m1dbNdM.mp4/HGb9m1dbNdM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HGb9m1dbNdM.m3u8/HGb9m1dbNdM.m3u8"}, "slug": "vaccines-and-the-autism-myth-part-2", "video_id": "HGb9m1dbNdM", "youtube_id": "HGb9m1dbNdM", "readable_id": "vaccines-and-the-autism-myth-part-2"}, "xAL0tbYU8QU": {"duration": 722, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-muscle-contraction/sympathetic-nerves-affect-myosin-activity/", "keywords": "", "id": "xAL0tbYU8QU", "title": "Sympathetic nerves affect myosin activity", "description": "Check out how the amount of Myosin that is tugging on your heart can change depending on your activity level! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xAL0tbYU8QU.mp4/xAL0tbYU8QU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xAL0tbYU8QU.mp4/xAL0tbYU8QU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xAL0tbYU8QU.m3u8/xAL0tbYU8QU.m3u8"}, "slug": "sympathetic-nerves-affect-myosin-activity", "video_id": "xAL0tbYU8QU", "youtube_id": "xAL0tbYU8QU", "readable_id": "sympathetic-nerves-affect-myosin-activity"}, "Tbq-KZaXiL4": {"duration": 953, "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/neuronal-synapses-chemical/", "keywords": "neuron, chemical, synapse", "id": "Tbq-KZaXiL4", "title": "Neuronal synapses (chemical)", "description": "How one neuron can stimulate (or inhibit) another neuron at a chemical synapse", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Tbq-KZaXiL4.mp4/Tbq-KZaXiL4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Tbq-KZaXiL4.mp4/Tbq-KZaXiL4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Tbq-KZaXiL4.m3u8/Tbq-KZaXiL4.m3u8"}, "slug": "neuronal-synapses-chemical", "video_id": "Tbq-KZaXiL4", "youtube_id": "Tbq-KZaXiL4", "readable_id": "neuronal-synapses-chemical"}, "S-9iY1OgbDE": {"duration": 412, "path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/pegging-the-yuan/", "keywords": "yuan, dollar, renminbi, peg, currency, reserve, central, bank, china", "id": "S-9iY1OgbDE", "title": "Pegging the yuan", "description": "How the Chinese Central Bank could peg the Yuan to the dollar by printing Yuan and buying dollars (building up a dollar reserve)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S-9iY1OgbDE.mp4/S-9iY1OgbDE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S-9iY1OgbDE.mp4/S-9iY1OgbDE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S-9iY1OgbDE.m3u8/S-9iY1OgbDE.m3u8"}, "slug": "pegging-the-yuan", "video_id": "S-9iY1OgbDE", "youtube_id": "S-9iY1OgbDE", "readable_id": "pegging-the-yuan"}, "FK6-tZ5D7xM": {"duration": 612, "path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/tangent-graph/", "keywords": "", "id": "FK6-tZ5D7xM", "title": "Tangent graph", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FK6-tZ5D7xM.mp4/FK6-tZ5D7xM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FK6-tZ5D7xM.mp4/FK6-tZ5D7xM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FK6-tZ5D7xM.m3u8/FK6-tZ5D7xM.m3u8"}, "slug": "tangent-graph", "video_id": "FK6-tZ5D7xM", "youtube_id": "FK6-tZ5D7xM", "readable_id": "tangent-graph"}, "odpzXKZDTt0": {"duration": 113, "path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-design-building-lego-robots/", "keywords": "", "id": "odpzXKZDTt0", "title": "DLab: Inspired by sumo robots", "description": "Inspiration from Khan Academy's Discovery Lab", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/odpzXKZDTt0.mp4/odpzXKZDTt0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/odpzXKZDTt0.mp4/odpzXKZDTt0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/odpzXKZDTt0.m3u8/odpzXKZDTt0.m3u8"}, "slug": "discovery-lab-design-building-lego-robots", "video_id": "odpzXKZDTt0", "youtube_id": "odpzXKZDTt0", "readable_id": "discovery-lab-design-building-lego-robots"}, "C_OmWlMjsxQ": {"duration": 218, "path": "khan/humanities/art-1010/minimalism-earthworks/moma-serra-intersection-ii/", "keywords": "", "id": "C_OmWlMjsxQ", "title": "Richard Serra, \"Intersection II\"", "description": "Richard Serra talks about how this sculpture made of 4 identical plates, allows us to explore 3 very different spaces. To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C_OmWlMjsxQ.mp4/C_OmWlMjsxQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C_OmWlMjsxQ.mp4/C_OmWlMjsxQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C_OmWlMjsxQ.m3u8/C_OmWlMjsxQ.m3u8"}, "slug": "moma-serra-intersection-ii", "video_id": "C_OmWlMjsxQ", "youtube_id": "C_OmWlMjsxQ", "readable_id": "moma-serra-intersection-ii"}, "8gnpnUFNloo": {"duration": 640, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/how-hiv-kills-so-many-cd4-t-cells/", "keywords": "HIV (Disease Cause),T Cell (Anatomical Structure),T Helper Cell,CD4 (Protein),Health (Industry)", "id": "8gnpnUFNloo", "title": "How HIV kills so many CD4 T cells", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8gnpnUFNloo.mp4/8gnpnUFNloo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8gnpnUFNloo.mp4/8gnpnUFNloo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8gnpnUFNloo.m3u8/8gnpnUFNloo.m3u8"}, "slug": "how-hiv-kills-so-many-cd4-t-cells", "video_id": "8gnpnUFNloo", "youtube_id": "8gnpnUFNloo", "readable_id": "how-hiv-kills-so-many-cd4-t-cells"}, "hiRGC4lS9k8": {"duration": 568, "path": "khan/humanities/history/crashcourse-worldhistory/so-thats-where-that-comes-from-2/crash-course-world-history-09/", "keywords": "crash course", "id": "hiRGC4lS9k8", "title": "The Silk Road and ancient trade", "description": "In which John Green teaches you about the so-called Silk Road, a network of trade routes where goods such as ivory, silver, iron, wine, and yes, silk were exchanged across the ancient world, from China to the West. Along with all these consumer goods, things like disease and ideas made the trip as well. As is his custom, John ties the Silk Road to modern life, and the ways that we get our stuff today.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hiRGC4lS9k8.mp4/hiRGC4lS9k8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hiRGC4lS9k8.mp4/hiRGC4lS9k8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hiRGC4lS9k8.m3u8/hiRGC4lS9k8.m3u8"}, "slug": "crash-course-world-history-09", "video_id": "hiRGC4lS9k8", "youtube_id": "hiRGC4lS9k8", "readable_id": "crash-course-world-history-09"}, "9hM32lsQ4aI": {"duration": 184, "path": "khan/math/arithmetic/addition-subtraction/addition_carrying/example-adding-with-carrying/", "keywords": "", "id": "9hM32lsQ4aI", "title": "Adding three digit numbers with regrouping", "description": "In the old days 'regrouping' was known as \"carrying.\" It's the same idea now as then: moving the tens (or hundreds or thousands) over to the next column.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9hM32lsQ4aI.mp4/9hM32lsQ4aI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9hM32lsQ4aI.mp4/9hM32lsQ4aI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9hM32lsQ4aI.m3u8/9hM32lsQ4aI.m3u8"}, "slug": "example-adding-with-carrying", "video_id": "9hM32lsQ4aI", "youtube_id": "9hM32lsQ4aI", "readable_id": "example-adding-with-carrying"}, "GFnucXG0K1I": {"duration": 462, "path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-3-meters-in-double-and-triple-time-upbeats/", "keywords": "", "id": "GFnucXG0K1I", "title": "Lesson 3: Meters in double and triple time, upbeats", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GFnucXG0K1I.mp4/GFnucXG0K1I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GFnucXG0K1I.mp4/GFnucXG0K1I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GFnucXG0K1I.m3u8/GFnucXG0K1I.m3u8"}, "slug": "lesson-3-meters-in-double-and-triple-time-upbeats", "video_id": "GFnucXG0K1I", "youtube_id": "GFnucXG0K1I", "readable_id": "lesson-3-meters-in-double-and-triple-time-upbeats"}, "97POZGcfoY8": {"duration": 484, "path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-2-electron-clouds/", "keywords": "", "id": "97POZGcfoY8", "title": "VSEPR for 2 electron clouds", "description": "Definition of VSEPR and examples of molecules with two electron clouds.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/97POZGcfoY8.mp4/97POZGcfoY8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/97POZGcfoY8.mp4/97POZGcfoY8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/97POZGcfoY8.m3u8/97POZGcfoY8.m3u8"}, "slug": "vsepr-for-2-electron-clouds", "video_id": "97POZGcfoY8", "youtube_id": "97POZGcfoY8", "readable_id": "vsepr-for-2-electron-clouds"}, "vQnG0fyEr_w": {"duration": 435, "path": "khan/partner-content/wi-phi/the-history-of-philosophy/kant-on-space-part-1/", "keywords": "", "id": "vQnG0fyEr_w", "title": "Kant: On Space, Part 1", "description": "What is space? Kant's answer is a head-scratcher:\u00a0space is merely a form of intuition. Scott Edgar explains this rather perplexing answer in accessible, every-day language. He also lays out \u00a0Kant's most famous argument for this view of space (the \"Argument from Geometry\"). Never before has it been so easy to get a handle on Kant's views on space!\n\nSpeaker: Dr. Scott Edgar, Assistant Professor, Saint Mary's University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vQnG0fyEr_w.mp4/vQnG0fyEr_w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vQnG0fyEr_w.mp4/vQnG0fyEr_w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vQnG0fyEr_w.m3u8/vQnG0fyEr_w.m3u8"}, "slug": "kant-on-space-part-1", "video_id": "vQnG0fyEr_w", "youtube_id": "vQnG0fyEr_w", "readable_id": "kant-on-space-part-1"}, "wyT4IvTGSwk": {"duration": 272, "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-barnett-newman/", "keywords": "", "id": "wyT4IvTGSwk", "title": "Barnett Newman", "description": "Set aside the everyday and enter the profound, even spiritual space of Barnett Newman's paintings. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wyT4IvTGSwk.mp4/wyT4IvTGSwk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wyT4IvTGSwk.mp4/wyT4IvTGSwk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wyT4IvTGSwk.m3u8/wyT4IvTGSwk.m3u8"}, "slug": "moma-barnett-newman", "video_id": "wyT4IvTGSwk", "youtube_id": "wyT4IvTGSwk", "readable_id": "moma-barnett-newman"}, "B-J9IHGivfQ": {"duration": 393, "path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/social-perception-the-just-world-hypothesis/", "keywords": "", "id": "B-J9IHGivfQ", "title": "Social perception - The Just World Hypothesis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/B-J9IHGivfQ.mp4/B-J9IHGivfQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/B-J9IHGivfQ.mp4/B-J9IHGivfQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/B-J9IHGivfQ.m3u8/B-J9IHGivfQ.m3u8"}, "slug": "social-perception-the-just-world-hypothesis", "video_id": "B-J9IHGivfQ", "youtube_id": "B-J9IHGivfQ", "readable_id": "social-perception-the-just-world-hypothesis"}, "-DDSEQlZKsE": {"duration": 319, "path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/other-types-of-dementia/", "keywords": "Dementia (Disease Or Medical Condition),Health (Industry)", "id": "-DDSEQlZKsE", "title": "Other types of dementia", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-DDSEQlZKsE.mp4/-DDSEQlZKsE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-DDSEQlZKsE.mp4/-DDSEQlZKsE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-DDSEQlZKsE.m3u8/-DDSEQlZKsE.m3u8"}, "slug": "other-types-of-dementia", "video_id": "-DDSEQlZKsE", "youtube_id": "-DDSEQlZKsE", "readable_id": "other-types-of-dementia"}, "-ngmZo-dvy4": {"duration": 426, "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-madonna-of-the-pesaro-family/", "keywords": "Titian", "id": "-ngmZo-dvy4", "title": "Titian, Madonna of the Pesaro Family", "description": "Titian, Madonna of the Pesaro Family, 1519-26, oil on canvas, 16' x 9' (Santa Maria Gloriosa die Frari, Venice). Speakers: Dr. Beth Harris & Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-ngmZo-dvy4.mp4/-ngmZo-dvy4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-ngmZo-dvy4.mp4/-ngmZo-dvy4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-ngmZo-dvy4.m3u8/-ngmZo-dvy4.m3u8"}, "slug": "titian-madonna-of-the-pesaro-family", "video_id": "-ngmZo-dvy4", "youtube_id": "-ngmZo-dvy4", "readable_id": "titian-madonna-of-the-pesaro-family"}, "TljVBB7gxbE": {"duration": 693, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-15-part-2/", "keywords": "complex, analysis, trigonometry, competition, math", "id": "TljVBB7gxbE", "title": "2003 AIME II problem 15 (part 2)", "description": "Finding the sum of the absolute value of the imaginary parts of the square of the roots of a crazy polynomial", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TljVBB7gxbE.mp4/TljVBB7gxbE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TljVBB7gxbE.mp4/TljVBB7gxbE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TljVBB7gxbE.m3u8/TljVBB7gxbE.m3u8"}, "slug": "2003-aime-ii-problem-15-part-2", "video_id": "TljVBB7gxbE", "youtube_id": "TljVBB7gxbE", "readable_id": "2003-aime-ii-problem-15-part-2"}, "FogJFEEYuO0": {"duration": 440, "path": "khan/math/pre-algebra/negatives-absolute-value-pre-alg/abs-value-pre-alg/constructing-and-interpreting-absolute-value/", "keywords": "", "id": "FogJFEEYuO0", "title": "Constructing and interpreting absolute value", "description": "Apply an understanding of absolute value and adding/subtracting negative numbers to solve word problems.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FogJFEEYuO0.mp4/FogJFEEYuO0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FogJFEEYuO0.mp4/FogJFEEYuO0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FogJFEEYuO0.m3u8/FogJFEEYuO0.m3u8"}, "slug": "constructing-and-interpreting-absolute-value", "video_id": "FogJFEEYuO0", "youtube_id": "FogJFEEYuO0", "readable_id": "constructing-and-interpreting-absolute-value"}, "JnpqlXN9Whw": {"duration": 434, "path": "khan/math/pre-algebra/exponents-radicals/negative-exponents-tutorial/negative-exponents/", "keywords": "", "id": "JnpqlXN9Whw", "title": "Negative exponents", "description": "How does a negative exponent affect our answer? Before you assume that the answer must be negative, think again!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JnpqlXN9Whw.mp4/JnpqlXN9Whw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JnpqlXN9Whw.mp4/JnpqlXN9Whw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JnpqlXN9Whw.m3u8/JnpqlXN9Whw.m3u8"}, "slug": "negative-exponents", "video_id": "JnpqlXN9Whw", "youtube_id": "JnpqlXN9Whw", "readable_id": "negative-exponents"}, "iEVciE2j6ZA": {"duration": 677, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/obstructive-shock/", "keywords": "", "id": "iEVciE2j6ZA", "title": "Obstructive shock", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iEVciE2j6ZA.mp4/iEVciE2j6ZA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iEVciE2j6ZA.mp4/iEVciE2j6ZA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iEVciE2j6ZA.m3u8/iEVciE2j6ZA.m3u8"}, "slug": "obstructive-shock", "video_id": "iEVciE2j6ZA", "youtube_id": "iEVciE2j6ZA", "readable_id": "obstructive-shock"}, "9slylqZ1MOk": {"duration": 155, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-passages/sat-writing-argument-passage/", "keywords": "", "id": "9slylqZ1MOk", "title": "Writing: Argument \u2014 How-to example", "description": "Watch Sal work through an SAT Writing: Argument passage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9slylqZ1MOk.mp4/9slylqZ1MOk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9slylqZ1MOk.mp4/9slylqZ1MOk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9slylqZ1MOk.m3u8/9slylqZ1MOk.m3u8"}, "slug": "sat-writing-argument-passage", "video_id": "9slylqZ1MOk", "youtube_id": "9slylqZ1MOk", "readable_id": "sat-writing-argument-passage"}, "eROhIFBGKuU": {"duration": 525, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/membrane-potentials-part-2/", "keywords": "", "id": "eROhIFBGKuU", "title": "Membrane potentials - part 2", "description": "Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eROhIFBGKuU.mp4/eROhIFBGKuU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eROhIFBGKuU.mp4/eROhIFBGKuU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eROhIFBGKuU.m3u8/eROhIFBGKuU.m3u8"}, "slug": "membrane-potentials-part-2", "video_id": "eROhIFBGKuU", "youtube_id": "eROhIFBGKuU", "readable_id": "membrane-potentials-part-2"}, "CbgWfnqLJI0": {"duration": 637, "path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-stereochemistry-of-diene-new/", "keywords": "Diene (Chemical Compound),Diels\u2013Alder Reaction", "id": "CbgWfnqLJI0", "title": "Diels-Alder: stereochemistry of diene", "description": "How to analyze the stereochemistry of the diene in a Diels-Alder reaction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CbgWfnqLJI0.mp4/CbgWfnqLJI0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CbgWfnqLJI0.mp4/CbgWfnqLJI0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CbgWfnqLJI0.m3u8/CbgWfnqLJI0.m3u8"}, "slug": "diels-alder-stereochemistry-of-diene-new", "video_id": "CbgWfnqLJI0", "youtube_id": "CbgWfnqLJI0", "readable_id": "diels-alder-stereochemistry-of-diene-new"}, "5RRyX9mI5Lw": {"duration": 357, "path": "khan/test-prep/mcat/society-and-culture/culture/mass-media/", "keywords": "", "id": "5RRyX9mI5Lw", "title": "Mass media", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5RRyX9mI5Lw.mp4/5RRyX9mI5Lw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5RRyX9mI5Lw.mp4/5RRyX9mI5Lw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5RRyX9mI5Lw.m3u8/5RRyX9mI5Lw.m3u8"}, "slug": "mass-media", "video_id": "5RRyX9mI5Lw", "youtube_id": "5RRyX9mI5Lw", "readable_id": "mass-media"}, "rBaCDC52NOY": {"duration": 445, "path": "khan/math/recreational-math/puzzles/brain-teasers/brain-teaser-blue-forehead-room/", "keywords": "brain, teaser, recursion", "id": "rBaCDC52NOY", "title": "Blue forehead room brain teaser", "description": "What happens when 100 perfect logicians have to figure out if they each have a blue forehead?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rBaCDC52NOY.mp4/rBaCDC52NOY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rBaCDC52NOY.mp4/rBaCDC52NOY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rBaCDC52NOY.m3u8/rBaCDC52NOY.m3u8"}, "slug": "brain-teaser-blue-forehead-room", "video_id": "rBaCDC52NOY", "youtube_id": "rBaCDC52NOY", "readable_id": "brain-teaser-blue-forehead-room"}, "y-1Gh4ewklY": {"duration": 1107, "path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/introduction-to-mortgage-loans/", "keywords": "mortgage, loans", "id": "y-1Gh4ewklY", "title": "Introduction to mortgage loans", "description": "Introduction to mortgage loans", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y-1Gh4ewklY.mp4/y-1Gh4ewklY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y-1Gh4ewklY.mp4/y-1Gh4ewklY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y-1Gh4ewklY.m3u8/y-1Gh4ewklY.m3u8"}, "slug": "introduction-to-mortgage-loans", "video_id": "y-1Gh4ewklY", "youtube_id": "y-1Gh4ewklY", "readable_id": "introduction-to-mortgage-loans"}, "jAfJcgPGqgI": {"duration": 448, "path": "khan/math/early-math/cc-early-math-add-sub-1000/cc-early-math-strategies-for-adding-two-and-three-digit-numbers/rethinking-three-digit-addition-for-mental-calculation/", "keywords": "education,online learning,learning,lessons", "id": "jAfJcgPGqgI", "title": "Rethinking three digit addition for mental calculation", "description": "Learn some techniques for doing mental addition, such as making groups of 10 and 100.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jAfJcgPGqgI.mp4/jAfJcgPGqgI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jAfJcgPGqgI.mp4/jAfJcgPGqgI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jAfJcgPGqgI.m3u8/jAfJcgPGqgI.m3u8"}, "slug": "rethinking-three-digit-addition-for-mental-calculation", "video_id": "jAfJcgPGqgI", "youtube_id": "jAfJcgPGqgI", "readable_id": "rethinking-three-digit-addition-for-mental-calculation"}, "yogD_-Op4Wc": {"duration": 1312, "path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/napoleon-and-the-war-of-the-third-coalition/", "keywords": "Napoleon, Bonaparte, France, Coalition, Wars", "id": "yogD_-Op4Wc", "title": "Napoleon and the War of the Third Coalition", "description": "Napoleon leads France to become the dominant power in Europe. Napoleon I becomes Emperor of France.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yogD_-Op4Wc.mp4/yogD_-Op4Wc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yogD_-Op4Wc.mp4/yogD_-Op4Wc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yogD_-Op4Wc.m3u8/yogD_-Op4Wc.m3u8"}, "slug": "napoleon-and-the-war-of-the-third-coalition", "video_id": "yogD_-Op4Wc", "youtube_id": "yogD_-Op4Wc", "readable_id": "napoleon-and-the-war-of-the-third-coalition"}, "i6lfVUp5RW8": {"duration": 686, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/algebra-foundations-scientific-notation/scientific-notation/", "keywords": "Scientific, Notation", "id": "i6lfVUp5RW8", "title": "Scientific notation examples", "description": "Learn how to solve a variety of scientific notation problems.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i6lfVUp5RW8.mp4/i6lfVUp5RW8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i6lfVUp5RW8.mp4/i6lfVUp5RW8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i6lfVUp5RW8.m3u8/i6lfVUp5RW8.m3u8"}, "slug": "scientific-notation", "video_id": "i6lfVUp5RW8", "youtube_id": "i6lfVUp5RW8", "readable_id": "scientific-notation"}, "BSf_YIyZzi8": {"duration": 529, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/ventricular-fibrillation/", "keywords": "", "id": "BSf_YIyZzi8", "title": "What is ventricle fibrillation (Vfib)?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BSf_YIyZzi8.mp4/BSf_YIyZzi8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BSf_YIyZzi8.mp4/BSf_YIyZzi8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BSf_YIyZzi8.m3u8/BSf_YIyZzi8.m3u8"}, "slug": "ventricular-fibrillation", "video_id": "BSf_YIyZzi8", "youtube_id": "BSf_YIyZzi8", "readable_id": "ventricular-fibrillation"}, "YDYxQMBm50k": {"duration": 241, "path": "khan/humanities/becoming-modern/victorian-art-architecture/victorian-late/sir-lawrence-alma-tadema-a-reading-from-homer-1885/", "keywords": "Sir Lawrence Alma-Tadema, Alma-Tadema, A Reading from Homer, Reading, Homer, 1885, Philadelphia Museum of Art, Philadelphia, Victorian, Ancient Greece, Epic Poetry, Listening, art, painting, art history, Khan Academy, Google Art Project, Smarthistory, OER", "id": "YDYxQMBm50k", "title": "Alma-Tadema, Listening to Homer", "description": "Sir Lawrence Alma-Tadema, A Reading from Homer, 1885, oil on canvas, 36-1/8 x 72-1/4 inches / 91.8 x 183.5 cm (Philadelphia Museum of Art)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YDYxQMBm50k.mp4/YDYxQMBm50k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YDYxQMBm50k.mp4/YDYxQMBm50k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YDYxQMBm50k.m3u8/YDYxQMBm50k.m3u8"}, "slug": "sir-lawrence-alma-tadema-a-reading-from-homer-1885", "video_id": "YDYxQMBm50k", "youtube_id": "YDYxQMBm50k", "readable_id": "sir-lawrence-alma-tadema-a-reading-from-homer-1885"}, "Es8yvgc5kvY": {"duration": 143, "path": "khan/math/algebra/introduction-to-algebra/writing-expressions-tutorial/writing-expressions-2-exercise-example/", "keywords": "", "id": "Es8yvgc5kvY", "title": "Writing algebraic expressions example 2", "description": "Like other exercises in this tutorial, we're rewriting statements into algebraic expression. This time we have to choose which is the correct one among those given.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Es8yvgc5kvY.mp4/Es8yvgc5kvY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Es8yvgc5kvY.mp4/Es8yvgc5kvY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Es8yvgc5kvY.m3u8/Es8yvgc5kvY.m3u8"}, "slug": "writing-expressions-2-exercise-example", "video_id": "Es8yvgc5kvY", "youtube_id": "Es8yvgc5kvY", "readable_id": "writing-expressions-2-exercise-example"}, "qHO1xH4ilZs": {"duration": 634, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-6/", "keywords": "GMAT, math, data, sufficiency", "id": "qHO1xH4ilZs", "title": "GMAT: Data sufficiency 6", "description": "28-32, pg. 280", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qHO1xH4ilZs.mp4/qHO1xH4ilZs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qHO1xH4ilZs.mp4/qHO1xH4ilZs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qHO1xH4ilZs.m3u8/qHO1xH4ilZs.m3u8"}, "slug": "gmat-data-sufficiency-6", "video_id": "qHO1xH4ilZs", "youtube_id": "qHO1xH4ilZs", "readable_id": "gmat-data-sufficiency-6"}, "LMHxxvbzFqc": {"duration": 482, "path": "khan/science/health-and-medicine/health-care-system/healthcare-system-overview/", "keywords": "healthcare, economics", "id": "LMHxxvbzFqc", "title": "Healthcare system overview", "description": "The different roles in the healthcare system", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LMHxxvbzFqc.mp4/LMHxxvbzFqc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LMHxxvbzFqc.mp4/LMHxxvbzFqc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LMHxxvbzFqc.m3u8/LMHxxvbzFqc.m3u8"}, "slug": "healthcare-system-overview", "video_id": "LMHxxvbzFqc", "youtube_id": "LMHxxvbzFqc", "readable_id": "healthcare-system-overview"}, "iW3EP2FE5zc": {"duration": 712, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-14/", "keywords": "GMAT, data, sufficiency, math", "id": "iW3EP2FE5zc", "title": "GMAT: Data sufficiency 14", "description": "63-68, pgs. 282-283", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iW3EP2FE5zc.mp4/iW3EP2FE5zc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iW3EP2FE5zc.mp4/iW3EP2FE5zc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iW3EP2FE5zc.m3u8/iW3EP2FE5zc.m3u8"}, "slug": "gmat-data-sufficiency-14", "video_id": "iW3EP2FE5zc", "youtube_id": "iW3EP2FE5zc", "readable_id": "gmat-data-sufficiency-14"}, "un5wOmL3LBQ": {"duration": 180, "path": "khan/partner-content/big-history-project/future/other-materials10/bhp-hlg-visions-future/", "keywords": "", "id": "un5wOmL3LBQ", "title": "Henry Louis Gates, Jr.: Visions of the Future", "description": "How will resources and opportunity be distributed in the future? American Scholar Henry Louis Gates, Jr. hopes that the advances of technology will benefit everyone.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/un5wOmL3LBQ.mp4/un5wOmL3LBQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/un5wOmL3LBQ.mp4/un5wOmL3LBQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/un5wOmL3LBQ.m3u8/un5wOmL3LBQ.m3u8"}, "slug": "bhp-hlg-visions-future", "video_id": "un5wOmL3LBQ", "youtube_id": "un5wOmL3LBQ", "readable_id": "bhp-hlg-visions-future"}, "p4M2q1t_Up8": {"duration": 429, "path": "khan/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis/birch-reduction-i/", "keywords": "", "id": "p4M2q1t_Up8", "title": "Birch reduction I", "description": "The mechanism of the Birch Reduction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/p4M2q1t_Up8.mp4/p4M2q1t_Up8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/p4M2q1t_Up8.mp4/p4M2q1t_Up8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/p4M2q1t_Up8.m3u8/p4M2q1t_Up8.m3u8"}, "slug": "birch-reduction-i", "video_id": "p4M2q1t_Up8", "youtube_id": "p4M2q1t_Up8", "readable_id": "birch-reduction-i"}, "9wYbsSrDwbA": {"duration": 476, "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/teeth/", "keywords": "MCAT", "id": "9wYbsSrDwbA", "title": "Teeth", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9wYbsSrDwbA.mp4/9wYbsSrDwbA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9wYbsSrDwbA.mp4/9wYbsSrDwbA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9wYbsSrDwbA.m3u8/9wYbsSrDwbA.m3u8"}, "slug": "teeth", "video_id": "9wYbsSrDwbA", "youtube_id": "9wYbsSrDwbA", "readable_id": "teeth"}, "vItRHYu-A88": {"duration": 454, "path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/interest-price-of-money-tutorial/money-supply-and-demand-impacting-interest-rates/", "keywords": "microeconomics, macroeconomics", "id": "vItRHYu-A88", "title": "Money supply and demand impacting interest rates", "description": "Examples showing how various factors can affect interest rates", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vItRHYu-A88.mp4/vItRHYu-A88.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vItRHYu-A88.mp4/vItRHYu-A88.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vItRHYu-A88.m3u8/vItRHYu-A88.m3u8"}, "slug": "money-supply-and-demand-impacting-interest-rates", "video_id": "vItRHYu-A88", "youtube_id": "vItRHYu-A88", "readable_id": "money-supply-and-demand-impacting-interest-rates"}, "8YBQQ0GeusM": {"duration": 741, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-more-trig/", "keywords": "geometry, trigonometry, trig", "id": "8YBQQ0GeusM", "title": "CA Geometry: More trig", "description": "66-70, more trigonometry", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8YBQQ0GeusM.mp4/8YBQQ0GeusM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8YBQQ0GeusM.mp4/8YBQQ0GeusM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8YBQQ0GeusM.m3u8/8YBQQ0GeusM.m3u8"}, "slug": "ca-geometry-more-trig", "video_id": "8YBQQ0GeusM", "youtube_id": "8YBQQ0GeusM", "readable_id": "ca-geometry-more-trig"}, "3lHBgFvr3yE": {"duration": 144, "path": "khan/math/arithmetic/addition-subtraction/sub_borrowing/regrouping-from-0-when-subtracting-three-digit-numbers/", "keywords": "", "id": "3lHBgFvr3yE", "title": "Subtracting: Regrouping from zero", "description": "In Kindergarten you learned the importance of sharing, right? In math, when we lack value in a number to subtract with you borrow or regroup from a neighbor. Sometimes you borrow from the tens...but what if you have zero tens? Ha....let's watch this and learn!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3lHBgFvr3yE.mp4/3lHBgFvr3yE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3lHBgFvr3yE.mp4/3lHBgFvr3yE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3lHBgFvr3yE.m3u8/3lHBgFvr3yE.m3u8"}, "slug": "regrouping-from-0-when-subtracting-three-digit-numbers", "video_id": "3lHBgFvr3yE", "youtube_id": "3lHBgFvr3yE", "readable_id": "regrouping-from-0-when-subtracting-three-digit-numbers"}, "EPXilYOa71c": {"duration": 236, "path": "khan/computing/computer-science/cryptography/modern-crypt/intro-to-rsa-encryption/", "keywords": "RSA, encryption, public key cryptography", "id": "EPXilYOa71c", "title": "RSA encryption: Step 1", "description": "Introduction to why we would need RSA", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EPXilYOa71c.mp4/EPXilYOa71c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EPXilYOa71c.mp4/EPXilYOa71c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EPXilYOa71c.m3u8/EPXilYOa71c.m3u8"}, "slug": "intro-to-rsa-encryption", "video_id": "EPXilYOa71c", "youtube_id": "EPXilYOa71c", "readable_id": "intro-to-rsa-encryption"}, "VWAfEbgf1Po": {"duration": 284, "path": "khan/math/precalculus/prob_comb/independent_events_precalc/independent-events-2/", "keywords": "U12_L2_T2_we2, Independent, Events, CC_7_SP_8_b, CC_7_SP_8_c", "id": "VWAfEbgf1Po", "title": "Test taking probability and independent events", "description": "Have you ever taken a test and discovered you have no choice but to guess on a couple of problems? In this example problem, we are considering the probability of two independent events occurring.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VWAfEbgf1Po.mp4/VWAfEbgf1Po.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VWAfEbgf1Po.mp4/VWAfEbgf1Po.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VWAfEbgf1Po.m3u8/VWAfEbgf1Po.m3u8"}, "slug": "independent-events-2", "video_id": "VWAfEbgf1Po", "youtube_id": "VWAfEbgf1Po", "readable_id": "independent-events-2"}, "nJ-PtF14EFw": {"duration": 587, "path": "khan/test-prep/mcat/physical-processes/electronic-structure/bohr-model-energy-levels/", "keywords": "", "id": "nJ-PtF14EFw", "title": "Bohr model energy levels", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nJ-PtF14EFw.mp4/nJ-PtF14EFw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nJ-PtF14EFw.mp4/nJ-PtF14EFw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nJ-PtF14EFw.m3u8/nJ-PtF14EFw.m3u8"}, "slug": "bohr-model-energy-levels", "video_id": "nJ-PtF14EFw", "youtube_id": "nJ-PtF14EFw", "readable_id": "bohr-model-energy-levels"}, "pMFv6liWK4M": {"duration": 1409, "path": "khan/math/linear-algebra/vectors_and_spaces/subspace_basis/linear-subspaces/", "keywords": "Linear, Algebra, Vectors, span, combination, subspace", "id": "pMFv6liWK4M", "title": "Linear subspaces", "description": "Introduction to linear subspaces of Rn", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pMFv6liWK4M.mp4/pMFv6liWK4M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pMFv6liWK4M.mp4/pMFv6liWK4M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pMFv6liWK4M.m3u8/pMFv6liWK4M.m3u8"}, "slug": "linear-subspaces", "video_id": "pMFv6liWK4M", "youtube_id": "pMFv6liWK4M", "readable_id": "linear-subspaces"}, "wd4cRAoBOiE": {"duration": 249, "path": "khan/math/pre-algebra/order-of-operations/place_value/place-value-2/", "keywords": "U01_L1_T1_we2, Place, Value", "id": "wd4cRAoBOiE", "title": "Writing a number in standard form", "description": "Here's a BIG number that needs to be expressed in standard form. Can you do this example with us? I bet you can!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wd4cRAoBOiE.mp4/wd4cRAoBOiE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wd4cRAoBOiE.mp4/wd4cRAoBOiE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wd4cRAoBOiE.m3u8/wd4cRAoBOiE.m3u8"}, "slug": "place-value-2", "video_id": "wd4cRAoBOiE", "youtube_id": "wd4cRAoBOiE", "readable_id": "place-value-2"}, "jpKjXtywTlQ": {"duration": 793, "path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-7/", "keywords": "circumscribed, circle, triangle, circumcircle, rhombus, CC_7_G_6", "id": "jpKjXtywTlQ", "title": "2003 AIME II problem 7", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jpKjXtywTlQ.mp4/jpKjXtywTlQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jpKjXtywTlQ.mp4/jpKjXtywTlQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jpKjXtywTlQ.m3u8/jpKjXtywTlQ.m3u8"}, "slug": "2003-aime-ii-problem-7", "video_id": "jpKjXtywTlQ", "youtube_id": "jpKjXtywTlQ", "readable_id": "2003-aime-ii-problem-7"}, "oeyBfrx5RJY": {"duration": 468, "path": "khan/science/organic-chemistry/aldehydes-ketones/nomenclature-aldehyde-ketone/aldehyde-introduction/", "keywords": "aldehyde, formaldehyde, acetalaldehyde, benzaldehyde, cinnamaldehyde", "id": "oeyBfrx5RJY", "title": "Aldehyde introduction", "description": "Aldehyde introduction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oeyBfrx5RJY.mp4/oeyBfrx5RJY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oeyBfrx5RJY.mp4/oeyBfrx5RJY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oeyBfrx5RJY.m3u8/oeyBfrx5RJY.m3u8"}, "slug": "aldehyde-introduction", "video_id": "oeyBfrx5RJY", "youtube_id": "oeyBfrx5RJY", "readable_id": "aldehyde-introduction"}, "hxZ6uooEJOk": {"duration": 949, "path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/confidence-interval-of-difference-of-means/", "keywords": "Confidence, Interval, of, Difference, Means, CC_7_SP_2, CC_7_SP_3, CC_7_SP_4", "id": "hxZ6uooEJOk", "title": "Confidence interval of difference of means", "description": "Confidence Interval of Difference of Means", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hxZ6uooEJOk.mp4/hxZ6uooEJOk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hxZ6uooEJOk.mp4/hxZ6uooEJOk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hxZ6uooEJOk.m3u8/hxZ6uooEJOk.m3u8"}, "slug": "confidence-interval-of-difference-of-means", "video_id": "hxZ6uooEJOk", "youtube_id": "hxZ6uooEJOk", "readable_id": "confidence-interval-of-difference-of-means"}, "2pwnr_soZEU": {"duration": 503, "path": "khan/math/trigonometry/trig-function-graphs/modeling-periodic-functions/inverse-trig-with-model/", "keywords": "", "id": "2pwnr_soZEU", "title": "Applying inverse trig function with model", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2pwnr_soZEU.mp4/2pwnr_soZEU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2pwnr_soZEU.mp4/2pwnr_soZEU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2pwnr_soZEU.m3u8/2pwnr_soZEU.m3u8"}, "slug": "inverse-trig-with-model", "video_id": "2pwnr_soZEU", "youtube_id": "2pwnr_soZEU", "readable_id": "inverse-trig-with-model"}, "Y8ortjAPw0Q": {"duration": 210, "path": "khan/test-prep/mcat/behavior/human-development/major-motor-milestones/", "keywords": "", "id": "Y8ortjAPw0Q", "title": "Major motor milestones", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Y8ortjAPw0Q.mp4/Y8ortjAPw0Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Y8ortjAPw0Q.mp4/Y8ortjAPw0Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Y8ortjAPw0Q.m3u8/Y8ortjAPw0Q.m3u8"}, "slug": "major-motor-milestones", "video_id": "Y8ortjAPw0Q", "youtube_id": "Y8ortjAPw0Q", "readable_id": "major-motor-milestones"}, "iUlYRyvQAIE": {"duration": 503, "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/diagnosing-diabetes/", "keywords": "", "id": "iUlYRyvQAIE", "title": "Diagnosing diabetes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iUlYRyvQAIE.mp4/iUlYRyvQAIE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iUlYRyvQAIE.mp4/iUlYRyvQAIE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iUlYRyvQAIE.m3u8/iUlYRyvQAIE.m3u8"}, "slug": "diagnosing-diabetes", "video_id": "iUlYRyvQAIE", "youtube_id": "iUlYRyvQAIE", "readable_id": "diagnosing-diabetes"}, "kPrv93a5L0I": {"duration": 169, "path": "khan/science/discoveries-projects/robots/spider_bot/8-attach-spider-s-wheels/", "keywords": "", "id": "kPrv93a5L0I", "title": "Spider's wheels", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kPrv93a5L0I.mp4/kPrv93a5L0I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kPrv93a5L0I.mp4/kPrv93a5L0I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kPrv93a5L0I.m3u8/kPrv93a5L0I.m3u8"}, "slug": "8-attach-spider-s-wheels", "video_id": "kPrv93a5L0I", "youtube_id": "kPrv93a5L0I", "readable_id": "8-attach-spider-s-wheels"}, "nRpwdwm06Ic": {"duration": 706, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/oxygen-movement-from-alveoli-to-capillaries/", "keywords": "", "id": "nRpwdwm06Ic", "title": "Oxygen movement from alveoli to capillaries", "description": "Watch as a molecule of oxygen makes its way from the alveoli (gas layer) through various liquid layers in order to end up in the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nRpwdwm06Ic.mp4/nRpwdwm06Ic.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nRpwdwm06Ic.mp4/nRpwdwm06Ic.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nRpwdwm06Ic.m3u8/nRpwdwm06Ic.m3u8"}, "slug": "oxygen-movement-from-alveoli-to-capillaries", "video_id": "nRpwdwm06Ic", "youtube_id": "nRpwdwm06Ic", "readable_id": "oxygen-movement-from-alveoli-to-capillaries"}, "0pv0QtOi5l8": {"duration": 598, "path": "khan/math/multivariable-calculus/double_triple_integrals/double_integrals/double-integrals-6/", "keywords": "double, integral, volume, calculus", "id": "0pv0QtOi5l8", "title": "Double integrals 6", "description": "Let's evaluate the double integrals with y=x^2 as one of the boundaries.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0pv0QtOi5l8.mp4/0pv0QtOi5l8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0pv0QtOi5l8.mp4/0pv0QtOi5l8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0pv0QtOi5l8.m3u8/0pv0QtOi5l8.m3u8"}, "slug": "double-integrals-6", "video_id": "0pv0QtOi5l8", "youtube_id": "0pv0QtOi5l8", "readable_id": "double-integrals-6"}, "iL6aM2xFixU": {"duration": 793, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/cardiomyopathy-signs-and-symptoms/", "keywords": "", "id": "iL6aM2xFixU", "title": "Cardiomyopathy signs and symptoms", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iL6aM2xFixU.mp4/iL6aM2xFixU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iL6aM2xFixU.mp4/iL6aM2xFixU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iL6aM2xFixU.m3u8/iL6aM2xFixU.m3u8"}, "slug": "cardiomyopathy-signs-and-symptoms", "video_id": "iL6aM2xFixU", "youtube_id": "iL6aM2xFixU", "readable_id": "cardiomyopathy-signs-and-symptoms"}, "o_eNoF1DnZs": {"duration": 737, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-30/", "keywords": "gmat, data, sufficiency, math", "id": "o_eNoF1DnZs", "title": "GMAT: Data sufficiency 30", "description": "121-124, pg. 288", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o_eNoF1DnZs.mp4/o_eNoF1DnZs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o_eNoF1DnZs.mp4/o_eNoF1DnZs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o_eNoF1DnZs.m3u8/o_eNoF1DnZs.m3u8"}, "slug": "gmat-data-sufficiency-30", "video_id": "o_eNoF1DnZs", "youtube_id": "o_eNoF1DnZs", "readable_id": "gmat-data-sufficiency-30"}, "e3RSRrUL1Os": {"duration": 184, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-apollo-and-daphne-1622-25/", "keywords": "bernini, rome, apollo, daphne, borghese, smarthistory, art, art history", "id": "e3RSRrUL1Os", "title": "Bernini, Apollo and Daphne", "description": "Bernini, Apollo and Daphne, 1622-25 (Galleria Borghese, Rome)\n\nVoices: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e3RSRrUL1Os.mp4/e3RSRrUL1Os.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e3RSRrUL1Os.mp4/e3RSRrUL1Os.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e3RSRrUL1Os.m3u8/e3RSRrUL1Os.m3u8"}, "slug": "bernini-apollo-and-daphne-1622-25", "video_id": "e3RSRrUL1Os", "youtube_id": "e3RSRrUL1Os", "readable_id": "bernini-apollo-and-daphne-1622-25"}, "elJUghWSVh4": {"duration": 757, "path": "khan/test-prep/mcat/physical-processes/electrostatics-1/electric-potential-energy/", "keywords": "electric, potential, energy", "id": "elJUghWSVh4", "title": "Electric potential energy", "description": "Introduction to electric potential", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/elJUghWSVh4.mp4/elJUghWSVh4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/elJUghWSVh4.mp4/elJUghWSVh4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/elJUghWSVh4.m3u8/elJUghWSVh4.m3u8"}, "slug": "electric-potential-energy", "video_id": "elJUghWSVh4", "youtube_id": "elJUghWSVh4", "readable_id": "electric-potential-energy"}, "v8PPsI0LqOY": {"duration": 742, "path": "khan/partner-content/cas-biodiversity/biodiversity-origin/speciation-extinction/biodiversity-and-extinction-then-and-now/", "keywords": "", "id": "v8PPsI0LqOY", "title": "Biodiversity and extinction, then and now", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v8PPsI0LqOY.mp4/v8PPsI0LqOY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v8PPsI0LqOY.mp4/v8PPsI0LqOY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v8PPsI0LqOY.m3u8/v8PPsI0LqOY.m3u8"}, "slug": "biodiversity-and-extinction-then-and-now", "video_id": "v8PPsI0LqOY", "youtube_id": "v8PPsI0LqOY", "readable_id": "biodiversity-and-extinction-then-and-now"}, "Iit8p6xzfr8": {"duration": 780, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-jay/nucleophilicity-and-basicity/", "keywords": "", "id": "Iit8p6xzfr8", "title": "Nucleophilicity and basicity", "description": "Correction: I forgot to draw a negative charge next to the first iodide anion.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Iit8p6xzfr8.mp4/Iit8p6xzfr8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Iit8p6xzfr8.mp4/Iit8p6xzfr8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Iit8p6xzfr8.m3u8/Iit8p6xzfr8.m3u8"}, "slug": "nucleophilicity-and-basicity", "video_id": "Iit8p6xzfr8", "youtube_id": "Iit8p6xzfr8", "readable_id": "nucleophilicity-and-basicity"}, "nV8taxEW8-0": {"duration": 194, "path": "khan/math/geometry/transformations/hs-geo-translations/determing-a-translation-between-points/", "keywords": "", "id": "nV8taxEW8-0", "title": "How to find the image of a point under a translation, given another image (example)", "description": "Sal solves the following problem:\nA translation acting on the coordinate plane takes the point (-169,434) to point (-203, -68). What are the coordinates of the image of point (31, -529) under this translation?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nV8taxEW8-0.mp4/nV8taxEW8-0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nV8taxEW8-0.mp4/nV8taxEW8-0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nV8taxEW8-0.m3u8/nV8taxEW8-0.m3u8"}, "slug": "determing-a-translation-between-points", "video_id": "nV8taxEW8-0", "youtube_id": "nV8taxEW8-0", "readable_id": "determing-a-translation-between-points"}, "s-5_H3z-Cv0": {"duration": 177, "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/fair-value-accounting/", "keywords": "Fair, Value, Historical, Cost, Accounting, mark, to, market", "id": "s-5_H3z-Cv0", "title": "Fair value accounting", "description": "Difference between Historical Cost and Fair Value Accounting", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/s-5_H3z-Cv0.mp4/s-5_H3z-Cv0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/s-5_H3z-Cv0.mp4/s-5_H3z-Cv0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/s-5_H3z-Cv0.m3u8/s-5_H3z-Cv0.m3u8"}, "slug": "fair-value-accounting", "video_id": "s-5_H3z-Cv0", "youtube_id": "s-5_H3z-Cv0", "readable_id": "fair-value-accounting"}, "U2W7HPyC0cM": {"duration": 672, "path": "khan/math/geometry/cc-geometry-circles/circles/language-and-notation-of-the-circle/", "keywords": "geometry, locus, circle", "id": "U2W7HPyC0cM", "title": "Language and notation of the circle", "description": "Formal definition of a circle. Tangent and secant lines. Diameters and radii. major and minor arcs", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U2W7HPyC0cM.mp4/U2W7HPyC0cM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U2W7HPyC0cM.mp4/U2W7HPyC0cM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U2W7HPyC0cM.m3u8/U2W7HPyC0cM.m3u8"}, "slug": "language-and-notation-of-the-circle", "video_id": "U2W7HPyC0cM", "youtube_id": "U2W7HPyC0cM", "readable_id": "language-and-notation-of-the-circle"}, "gHs3zuRek7o": {"duration": 378, "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/labor-marginal-product-rev/adding-demand-curves/", "keywords": "microeconomics", "id": "gHs3zuRek7o", "title": "Adding demand curves", "description": "How to add demand curves", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gHs3zuRek7o.mp4/gHs3zuRek7o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gHs3zuRek7o.mp4/gHs3zuRek7o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gHs3zuRek7o.m3u8/gHs3zuRek7o.m3u8"}, "slug": "adding-demand-curves", "video_id": "gHs3zuRek7o", "youtube_id": "gHs3zuRek7o", "readable_id": "adding-demand-curves"}, "lF-7leHMUbw": {"duration": 160, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/altered-states/", "keywords": "body, community, death, light, print, vellum, Europe", "id": "lF-7leHMUbw", "title": "Rembrandt, Christ Crucified between the Two Thieves: The Three Crosses.", "description": "Met curator Nadine Orenstein on universal emotion in Rembrandt van Rijn\u2019s Christ Crucified between the Two Thieves: The Three Crosses, 1653.\n\nThe Three Crosses, Rembrandt's finest works in any medium, represents the culmination of his virtuosity as a printmaker. He drew on the copperplate entirely in drypoint which allowed him to fully exploit the velvety areas of burr raised by the drypoint tool as it cut into the copper. When Rembrandt created this impression, he deliberately left ink on the printing plate; it lightly veils the figures standing at the foot of the cross on the right; a thicker layer almost completely covers the bushes along the right edge. By creatively inking the copperplate, Rembrandt in a certain sense painted each impression. Each time he printed the copperplate he created a unique work. He further varied impressions by printing them on different supports; this impression is printed on vellum, which infuses the composition with a warm light. Vellum, less absorbent than paper, holds ink on the surface, softening lines and enhancing the richness of entire effect.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a\u00a0related lesson plan. For additional educator resources from The Metropolitan Museum of Art, try this and also visit Find an Educator Resource.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lF-7leHMUbw.mp4/lF-7leHMUbw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lF-7leHMUbw.mp4/lF-7leHMUbw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lF-7leHMUbw.m3u8/lF-7leHMUbw.m3u8"}, "slug": "altered-states", "video_id": "lF-7leHMUbw", "youtube_id": "lF-7leHMUbw", "readable_id": "altered-states"}, "8RasCV_Lggg": {"duration": 736, "path": "khan/math/precalculus/imaginary_complex_precalc/complex_analysis/polar-form-complex-number/", "keywords": "", "id": "8RasCV_Lggg", "title": "Rectangular to polar form of complex number", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8RasCV_Lggg.mp4/8RasCV_Lggg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8RasCV_Lggg.mp4/8RasCV_Lggg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8RasCV_Lggg.m3u8/8RasCV_Lggg.m3u8"}, "slug": "polar-form-complex-number", "video_id": "8RasCV_Lggg", "youtube_id": "8RasCV_Lggg", "readable_id": "polar-form-complex-number"}, "1QihY-g20QA": {"duration": 264, "path": "khan/partner-content/big-history-project/expansion-interconnection/expansion/bhp-why-civilizations-expand/", "keywords": "", "id": "1QihY-g20QA", "title": "Why Did Civilizations Expand?", "description": "Expansion meant the addition of new territories, resources, and people.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1QihY-g20QA.mp4/1QihY-g20QA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1QihY-g20QA.mp4/1QihY-g20QA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1QihY-g20QA.m3u8/1QihY-g20QA.m3u8"}, "slug": "bhp-why-civilizations-expand", "video_id": "1QihY-g20QA", "youtube_id": "1QihY-g20QA", "readable_id": "bhp-why-civilizations-expand"}, "HJg_7bjGbX0": {"duration": 552, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-science-passage/", "keywords": "", "id": "HJg_7bjGbX0", "title": "Reading: Science \u2014 How-to Part 1", "description": "Watch Sal work through Part 1 of an SAT Reading: Science passage.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HJg_7bjGbX0.mp4/HJg_7bjGbX0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HJg_7bjGbX0.mp4/HJg_7bjGbX0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HJg_7bjGbX0.m3u8/HJg_7bjGbX0.m3u8"}, "slug": "reading-science-passage", "video_id": "HJg_7bjGbX0", "youtube_id": "HJg_7bjGbX0", "readable_id": "reading-science-passage"}, "vzID7ds600c": {"duration": 521, "path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/fluids-part-5/", "keywords": "Archimedes, principle, buoyant, force, physics, pressure", "id": "vzID7ds600c", "title": "Archimedes principle and buoyant force", "description": "Introduction to Archimedes' principle and buoyant force.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vzID7ds600c.mp4/vzID7ds600c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vzID7ds600c.mp4/vzID7ds600c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vzID7ds600c.m3u8/vzID7ds600c.m3u8"}, "slug": "fluids-part-5", "video_id": "vzID7ds600c", "youtube_id": "vzID7ds600c", "readable_id": "fluids-part-5"}, "KVRpXvrsSKM": {"duration": 388, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-hairy-trig-and-algebra-part-3/", "keywords": "2010, IIT, JEE, Paper, #38, Hairy, Trig, and, Algebra, (Part, 3)", "id": "KVRpXvrsSKM", "title": "IIT JEE hairy trig and algebra (part 3)", "description": "2010 IIT JEE Paper 1 #38 Hairy Trig and Algebra (Part 3)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KVRpXvrsSKM.mp4/KVRpXvrsSKM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KVRpXvrsSKM.mp4/KVRpXvrsSKM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KVRpXvrsSKM.m3u8/KVRpXvrsSKM.m3u8"}, "slug": "iit-jee-hairy-trig-and-algebra-part-3", "video_id": "KVRpXvrsSKM", "youtube_id": "KVRpXvrsSKM", "readable_id": "iit-jee-hairy-trig-and-algebra-part-3"}, "4EJay-6Bioo": {"duration": 454, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/hexadecimal-number-system/", "keywords": "", "id": "4EJay-6Bioo", "title": "Hexadecimal number system", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4EJay-6Bioo.mp4/4EJay-6Bioo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4EJay-6Bioo.mp4/4EJay-6Bioo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4EJay-6Bioo.m3u8/4EJay-6Bioo.m3u8"}, "slug": "hexadecimal-number-system", "video_id": "4EJay-6Bioo", "youtube_id": "4EJay-6Bioo", "readable_id": "hexadecimal-number-system"}, "nGjXhxjnlDQ": {"duration": 222, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p2-easier/", "keywords": "", "id": "nGjXhxjnlDQ", "title": "Manipulating quadratic and exponential expressions \u2014 Basic example", "description": "Watch Sal work through a basic Manipulating quadratic and exponential expressions problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nGjXhxjnlDQ.mp4/nGjXhxjnlDQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nGjXhxjnlDQ.mp4/nGjXhxjnlDQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nGjXhxjnlDQ.m3u8/nGjXhxjnlDQ.m3u8"}, "slug": "sat-math-p2-easier", "video_id": "nGjXhxjnlDQ", "youtube_id": "nGjXhxjnlDQ", "readable_id": "sat-math-p2-easier"}, "PI9DjVjeV2A": {"duration": 267, "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/paolo-veronese-the-dream-of-saint-helena-c-1570/", "keywords": "Paolo Veronese, Veronese, The Dream of Saint Helena, 1570, National Gallery, London, Constantine, Helena, Khan Academy, smarthistory, art history, Google Art Project", "id": "PI9DjVjeV2A", "title": "Veronese, the Dream of Saint Helena", "description": "Paolo Veronese, The Dream of Saint Helena, c. 1570, oil on canvas, 197.5 x 115.6 cm (The National Gallery, London)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PI9DjVjeV2A.mp4/PI9DjVjeV2A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PI9DjVjeV2A.mp4/PI9DjVjeV2A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PI9DjVjeV2A.m3u8/PI9DjVjeV2A.m3u8"}, "slug": "paolo-veronese-the-dream-of-saint-helena-c-1570", "video_id": "PI9DjVjeV2A", "youtube_id": "PI9DjVjeV2A", "readable_id": "paolo-veronese-the-dream-of-saint-helena-c-1570"}, "RamzvjMF3rc": {"duration": 166, "path": "khan/computing/computer-programming/programming/good-practices/help-others-learn-programming/", "keywords": "", "id": "RamzvjMF3rc", "title": "Help others learn!", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RamzvjMF3rc.mp4/RamzvjMF3rc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RamzvjMF3rc.mp4/RamzvjMF3rc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RamzvjMF3rc.m3u8/RamzvjMF3rc.m3u8"}, "slug": "help-others-learn-programming", "video_id": "RamzvjMF3rc", "youtube_id": "RamzvjMF3rc", "readable_id": "help-others-learn-programming"}, "rcLw4BlxaRs": {"duration": 318, "path": "khan/math/competition-math/amc-10/2013-amc-10-a/2013-amc-10-a-22-amc-12-a-18/", "keywords": "", "id": "rcLw4BlxaRs", "title": "2013 AMC 10 A #22 / AMC 12 A #18", "description": "Video by\u00a0Art of Problem Solving. \u00a0Problem from the MAA\u00a0American Mathematics Competitions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rcLw4BlxaRs.mp4/rcLw4BlxaRs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rcLw4BlxaRs.mp4/rcLw4BlxaRs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rcLw4BlxaRs.m3u8/rcLw4BlxaRs.m3u8"}, "slug": "2013-amc-10-a-22-amc-12-a-18", "video_id": "rcLw4BlxaRs", "youtube_id": "rcLw4BlxaRs", "readable_id": "2013-amc-10-a-22-amc-12-a-18"}, "uTlh861MtYk": {"duration": 181, "path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/china-pegs-to-dollar-to-keep-trade-imbalance/", "keywords": "China, Pegs, to, Dollar, Keep, Trade, Imbalance", "id": "uTlh861MtYk", "title": "China pegs to dollar to keep trade imbalance", "description": "China Pegs to Dollar to Keep Trade Imbalance", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uTlh861MtYk.mp4/uTlh861MtYk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uTlh861MtYk.mp4/uTlh861MtYk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uTlh861MtYk.m3u8/uTlh861MtYk.m3u8"}, "slug": "china-pegs-to-dollar-to-keep-trade-imbalance", "video_id": "uTlh861MtYk", "youtube_id": "uTlh861MtYk", "readable_id": "china-pegs-to-dollar-to-keep-trade-imbalance"}, "9TXArCzLTuc": {"duration": 95, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/conventional-expression-basic/", "keywords": "education,online learning,learning,lessons", "id": "9TXArCzLTuc", "title": "Writing: Conventional expression \u2014 Basic example", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0\u200bfrequently confused\u00a0words.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9TXArCzLTuc.mp4/9TXArCzLTuc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9TXArCzLTuc.mp4/9TXArCzLTuc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9TXArCzLTuc.m3u8/9TXArCzLTuc.m3u8"}, "slug": "conventional-expression-basic", "video_id": "9TXArCzLTuc", "youtube_id": "9TXArCzLTuc", "readable_id": "conventional-expression-basic"}, "dR_BFmDMRaI": {"duration": 809, "path": "khan/science/biology/her/evolution-and-natural-selection/natural-selection-and-the-owl-butterfly/", "keywords": "evolution, natural, selection, intelligent, design", "id": "dR_BFmDMRaI", "title": "Natural selection and the owl butterfly", "description": "How the \"Owl Butterfly\" may have gotten the spot on its wings.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dR_BFmDMRaI.mp4/dR_BFmDMRaI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dR_BFmDMRaI.mp4/dR_BFmDMRaI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dR_BFmDMRaI.m3u8/dR_BFmDMRaI.m3u8"}, "slug": "natural-selection-and-the-owl-butterfly", "video_id": "dR_BFmDMRaI", "youtube_id": "dR_BFmDMRaI", "readable_id": "natural-selection-and-the-owl-butterfly"}, "9K3R6xtO6SU": {"duration": 429, "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/preparation-of-acid-anhydrides/", "keywords": "", "id": "9K3R6xtO6SU", "title": "Preparation of acid anhydrides", "description": "How to prepare acid anhydrides from carboxylic acids", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9K3R6xtO6SU.mp4/9K3R6xtO6SU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9K3R6xtO6SU.mp4/9K3R6xtO6SU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9K3R6xtO6SU.m3u8/9K3R6xtO6SU.m3u8"}, "slug": "preparation-of-acid-anhydrides", "video_id": "9K3R6xtO6SU", "youtube_id": "9K3R6xtO6SU", "readable_id": "preparation-of-acid-anhydrides"}, "Z9Jh-Q59xso": {"duration": 835, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/nucleophilicity-basicity-sal/nucleophilicity-nucleophile-strength/", "keywords": "Nucleophilicity, Nucleophile, Strength, organic, chemistry", "id": "Z9Jh-Q59xso", "title": "Nucleophilicity (nucleophile strength)", "description": "Nucleophilicity (Nucleophile Strength)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Z9Jh-Q59xso.mp4/Z9Jh-Q59xso.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Z9Jh-Q59xso.mp4/Z9Jh-Q59xso.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Z9Jh-Q59xso.m3u8/Z9Jh-Q59xso.m3u8"}, "slug": "nucleophilicity-nucleophile-strength", "video_id": "Z9Jh-Q59xso", "youtube_id": "Z9Jh-Q59xso", "readable_id": "nucleophilicity-nucleophile-strength"}, "KUhdMbx5ges": {"duration": 597, "path": "khan/math/geometry/triangle-properties/triangle_property_review/review-of-triangle-properties/", "keywords": "orthocenter, circumcenter, centroid", "id": "KUhdMbx5ges", "title": "Review of triangle properties", "description": "Comparing perpendicular bisectors to angle bisectors to medians to altitudes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KUhdMbx5ges.mp4/KUhdMbx5ges.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KUhdMbx5ges.mp4/KUhdMbx5ges.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KUhdMbx5ges.m3u8/KUhdMbx5ges.m3u8"}, "slug": "review-of-triangle-properties", "video_id": "KUhdMbx5ges", "youtube_id": "KUhdMbx5ges", "readable_id": "review-of-triangle-properties"}, "R0OM94TaZOo": {"duration": 282, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/einsenmenger-coarctation-of-aorta/", "keywords": "", "id": "R0OM94TaZOo", "title": "Einsenmenger coarctation of aorta", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/R0OM94TaZOo.mp4/R0OM94TaZOo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/R0OM94TaZOo.mp4/R0OM94TaZOo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/R0OM94TaZOo.m3u8/R0OM94TaZOo.m3u8"}, "slug": "einsenmenger-coarctation-of-aorta", "video_id": "R0OM94TaZOo", "youtube_id": "R0OM94TaZOo", "readable_id": "einsenmenger-coarctation-of-aorta"}, "VIrkurR446s": {"duration": 801, "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/diabetic-retinopathy/", "keywords": "", "id": "VIrkurR446s", "title": "Diabetic retinopathy", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/VIrkurR446s.mp4/VIrkurR446s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/VIrkurR446s.mp4/VIrkurR446s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/VIrkurR446s.m3u8/VIrkurR446s.m3u8"}, "slug": "diabetic-retinopathy", "video_id": "VIrkurR446s", "youtube_id": "VIrkurR446s", "readable_id": "diabetic-retinopathy"}, "RUVsEovktGU": {"duration": 531, "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolistic-competition-oligop/monopolistic-competition-and-economic-profit/", "keywords": "microeconomics", "id": "RUVsEovktGU", "title": "Monopolistic competition and economic profit", "description": "Why it is hard for a monopolisitc competitor to make economic profit in the long run", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RUVsEovktGU.mp4/RUVsEovktGU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RUVsEovktGU.mp4/RUVsEovktGU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RUVsEovktGU.m3u8/RUVsEovktGU.m3u8"}, "slug": "monopolistic-competition-and-economic-profit", "video_id": "RUVsEovktGU", "youtube_id": "RUVsEovktGU", "readable_id": "monopolistic-competition-and-economic-profit"}, "T2ZnxsBWU3E": {"duration": 225, "path": "khan/science/discoveries-projects/robots/bit-zee/connecting-bit-zee-s-camera-to-the-arduino/", "keywords": "Connecting, digital camera, arduino, Bit-zee, bot, hack, make, diy, transistor, resistor", "id": "T2ZnxsBWU3E", "title": "Camera connection to the Arduino", "description": "In this video we wire Bit-zee's camera's shutter and power functions to some transistors on the bread board and then we connect the transistors to the Arduino.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/T2ZnxsBWU3E.mp4/T2ZnxsBWU3E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/T2ZnxsBWU3E.mp4/T2ZnxsBWU3E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/T2ZnxsBWU3E.m3u8/T2ZnxsBWU3E.m3u8"}, "slug": "connecting-bit-zee-s-camera-to-the-arduino", "video_id": "T2ZnxsBWU3E", "youtube_id": "T2ZnxsBWU3E", "readable_id": "connecting-bit-zee-s-camera-to-the-arduino"}, "8JYP_wU1JTU": {"duration": 599, "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/econ-intro-in-macro-tutorial/introduction-to-economics/", "keywords": "the, wealth, of, nations, macro, micro, economics, capitalism", "id": "8JYP_wU1JTU", "title": "Introduction to economics", "description": "Basic introduction to what microeconomics and macroeconomics study. A bit on Adam Smith.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8JYP_wU1JTU.mp4/8JYP_wU1JTU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8JYP_wU1JTU.mp4/8JYP_wU1JTU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8JYP_wU1JTU.m3u8/8JYP_wU1JTU.m3u8"}, "slug": "introduction-to-economics", "video_id": "8JYP_wU1JTU", "youtube_id": "8JYP_wU1JTU", "readable_id": "introduction-to-economics"}, "ZjTS8dBsF4w": {"duration": 72, "path": "khan/science/discoveries-projects/discoveries/resistance/current-change-due-to-electromagnet-load/", "keywords": "resistance, series", "id": "ZjTS8dBsF4w", "title": "Series load", "description": "Why does the deflection change when an electromagnet is attached to the circuit? Does it matter what side of the electromagnet we test?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZjTS8dBsF4w.mp4/ZjTS8dBsF4w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZjTS8dBsF4w.mp4/ZjTS8dBsF4w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZjTS8dBsF4w.m3u8/ZjTS8dBsF4w.m3u8"}, "slug": "current-change-due-to-electromagnet-load", "video_id": "ZjTS8dBsF4w", "youtube_id": "ZjTS8dBsF4w", "readable_id": "current-change-due-to-electromagnet-load"}, "14kScZR2iI4": {"duration": 232, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s2-easier/", "keywords": "", "id": "14kScZR2iI4", "title": "Right triangle word problems \u2014 Basic example", "description": "Watch Sal work through a basic Right triangle word problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/14kScZR2iI4.mp4/14kScZR2iI4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/14kScZR2iI4.mp4/14kScZR2iI4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/14kScZR2iI4.m3u8/14kScZR2iI4.m3u8"}, "slug": "sat-math-s2-easier", "video_id": "14kScZR2iI4", "youtube_id": "14kScZR2iI4", "readable_id": "sat-math-s2-easier"}, "55G8037gsKY": {"duration": 663, "path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/solving-quadratic-equations-by-square-roots/", "keywords": "Solving, Quadratic, Equations, by, Square, Roots, CC_39336_A-REI_4_b", "id": "55G8037gsKY", "title": "Solving quadratic equations by square roots", "description": "Solving Quadratic Equations by Square Roots", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/55G8037gsKY.mp4/55G8037gsKY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/55G8037gsKY.mp4/55G8037gsKY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/55G8037gsKY.m3u8/55G8037gsKY.m3u8"}, "slug": "solving-quadratic-equations-by-square-roots", "video_id": "55G8037gsKY", "youtube_id": "55G8037gsKY", "readable_id": "solving-quadratic-equations-by-square-roots"}, "a3NFAnHxpKw": {"duration": 221, "path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/data-on-chinese-foreign-assets-increase-in-2010/", "keywords": "Data, on, Chinese, Foreign, Assets, Increase, in, 2010", "id": "a3NFAnHxpKw", "title": "Data on Chinese foreign assets increase in 2010", "description": "Data on Chinese Foreign Assets Increase in 2010", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a3NFAnHxpKw.mp4/a3NFAnHxpKw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a3NFAnHxpKw.mp4/a3NFAnHxpKw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a3NFAnHxpKw.m3u8/a3NFAnHxpKw.m3u8"}, "slug": "data-on-chinese-foreign-assets-increase-in-2010", "video_id": "a3NFAnHxpKw", "youtube_id": "a3NFAnHxpKw", "readable_id": "data-on-chinese-foreign-assets-increase-in-2010"}, "PzDthFTzEa0": {"duration": 561, "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolistic-competition-oligop/oligopolies-and-monopolisitc-competition/", "keywords": "microeconomics", "id": "PzDthFTzEa0", "title": "Oligopolies and monopolistic competition", "description": "Thinking about different markets that are in-between monopolies and perfect competition", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PzDthFTzEa0.mp4/PzDthFTzEa0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PzDthFTzEa0.mp4/PzDthFTzEa0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PzDthFTzEa0.m3u8/PzDthFTzEa0.m3u8"}, "slug": "oligopolies-and-monopolisitc-competition", "video_id": "PzDthFTzEa0", "youtube_id": "PzDthFTzEa0", "readable_id": "oligopolies-and-monopolisitc-competition"}, "rkeU8_4nzKo": {"duration": 789, "path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/more-limits/", "keywords": "limits, calculus, CC_39336_F-IF_7", "id": "rkeU8_4nzKo", "title": "More limits", "description": "More limit examples", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rkeU8_4nzKo.mp4/rkeU8_4nzKo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rkeU8_4nzKo.mp4/rkeU8_4nzKo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rkeU8_4nzKo.m3u8/rkeU8_4nzKo.m3u8"}, "slug": "more-limits", "video_id": "rkeU8_4nzKo", "youtube_id": "rkeU8_4nzKo", "readable_id": "more-limits"}, "gm7lIcBkXFc": {"duration": 587, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/shunting-in-the-heart/", "keywords": "", "id": "gm7lIcBkXFc", "title": "Shunting in the heart", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gm7lIcBkXFc.mp4/gm7lIcBkXFc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gm7lIcBkXFc.mp4/gm7lIcBkXFc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gm7lIcBkXFc.m3u8/gm7lIcBkXFc.m3u8"}, "slug": "shunting-in-the-heart", "video_id": "gm7lIcBkXFc", "youtube_id": "gm7lIcBkXFc", "readable_id": "shunting-in-the-heart"}, "yqwnRekNLg4": {"duration": 278, "path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/covalent-modifications-to-enzymes/", "keywords": "", "id": "yqwnRekNLg4", "title": "Covalent modifications to enzymes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yqwnRekNLg4.mp4/yqwnRekNLg4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yqwnRekNLg4.mp4/yqwnRekNLg4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yqwnRekNLg4.m3u8/yqwnRekNLg4.m3u8"}, "slug": "covalent-modifications-to-enzymes", "video_id": "yqwnRekNLg4", "youtube_id": "yqwnRekNLg4", "readable_id": "covalent-modifications-to-enzymes"}, "DK1lCc9b7bg": {"duration": 210, "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-basics-tutorial/inflation-data/", "keywords": "finance, inflation", "id": "DK1lCc9b7bg", "title": "Inflation data", "description": "Looking at actual sequential and year-over-year inflation data", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DK1lCc9b7bg.mp4/DK1lCc9b7bg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DK1lCc9b7bg.mp4/DK1lCc9b7bg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DK1lCc9b7bg.m3u8/DK1lCc9b7bg.m3u8"}, "slug": "inflation-data", "video_id": "DK1lCc9b7bg", "youtube_id": "DK1lCc9b7bg", "readable_id": "inflation-data"}, "kFpLDQfEg1E": {"duration": 725, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties/alcohol-nomenclature/", "keywords": "", "id": "kFpLDQfEg1E", "title": "Alcohol nomenclature", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kFpLDQfEg1E.mp4/kFpLDQfEg1E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kFpLDQfEg1E.mp4/kFpLDQfEg1E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kFpLDQfEg1E.m3u8/kFpLDQfEg1E.m3u8"}, "slug": "alcohol-nomenclature", "video_id": "kFpLDQfEg1E", "youtube_id": "kFpLDQfEg1E", "readable_id": "alcohol-nomenclature"}, "aUBJtHwHASA": {"duration": 278, "path": "khan/test-prep/mcat/biomolecules/dna-technology/polymerase-chain-reaction-pcr/", "keywords": "", "id": "aUBJtHwHASA", "title": "Polymerase chain reaction (PCR)", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aUBJtHwHASA.mp4/aUBJtHwHASA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aUBJtHwHASA.mp4/aUBJtHwHASA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aUBJtHwHASA.m3u8/aUBJtHwHASA.m3u8"}, "slug": "polymerase-chain-reaction-pcr", "video_id": "aUBJtHwHASA", "youtube_id": "aUBJtHwHASA", "readable_id": "polymerase-chain-reaction-pcr"}, "EQrCdEF3vNE": {"duration": 267, "path": "khan/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-sub-100-word-problems/adding-and-subtracting-on-number-line-word-problems/", "keywords": "", "id": "EQrCdEF3vNE", "title": "Adding and subtracting on number line word problems", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EQrCdEF3vNE.mp4/EQrCdEF3vNE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EQrCdEF3vNE.mp4/EQrCdEF3vNE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EQrCdEF3vNE.m3u8/EQrCdEF3vNE.m3u8"}, "slug": "adding-and-subtracting-on-number-line-word-problems", "video_id": "EQrCdEF3vNE", "youtube_id": "EQrCdEF3vNE", "readable_id": "adding-and-subtracting-on-number-line-word-problems"}, "FPNhCVZlbJs": {"duration": 243, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/conv_rep_decimals/coverting-repeating-decimals-to-fractions-1/", "keywords": "Coverting, Repeating, Decimals, to, Fractions, 1", "id": "FPNhCVZlbJs", "title": "How to convert repeating decimals into fractions (part 1)", "description": "Learn how to convert the repeating decimals 0.77777... and 1.22222... to fractions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FPNhCVZlbJs.mp4/FPNhCVZlbJs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FPNhCVZlbJs.mp4/FPNhCVZlbJs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FPNhCVZlbJs.m3u8/FPNhCVZlbJs.m3u8"}, "slug": "coverting-repeating-decimals-to-fractions-1", "video_id": "FPNhCVZlbJs", "youtube_id": "FPNhCVZlbJs", "readable_id": "coverting-repeating-decimals-to-fractions-1"}, "9r8Wb7prWZA": {"duration": 630, "path": "khan/test-prep/gmat/problem-solving/gmat-math-13/", "keywords": "gmat, math, problem, solving", "id": "9r8Wb7prWZA", "title": "GMAT: Math 13", "description": "70-75, pg. 161", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9r8Wb7prWZA.mp4/9r8Wb7prWZA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9r8Wb7prWZA.mp4/9r8Wb7prWZA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9r8Wb7prWZA.m3u8/9r8Wb7prWZA.m3u8"}, "slug": "gmat-math-13", "video_id": "9r8Wb7prWZA", "youtube_id": "9r8Wb7prWZA", "readable_id": "gmat-math-13"}, "-h_x8TwC1ik": {"duration": 159, "path": "khan/science/physics/two-dimensional-motion/optimal-projectile-angle/optimal-angle-for-a-projectile-part-3-horizontal-distance-as-a-function-of-angle-and-speed/", "keywords": "Horizontal, distance, as, function, of, angle, (and, speed)", "id": "-h_x8TwC1ik", "title": "Optimal angle for a projectile part 3: Horizontal distance as a function of angle (and speed)", "description": "Horizontal distance as a function of angle (and speed)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-h_x8TwC1ik.mp4/-h_x8TwC1ik.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-h_x8TwC1ik.mp4/-h_x8TwC1ik.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-h_x8TwC1ik.m3u8/-h_x8TwC1ik.m3u8"}, "slug": "optimal-angle-for-a-projectile-part-3-horizontal-distance-as-a-function-of-angle-and-speed", "video_id": "-h_x8TwC1ik", "youtube_id": "-h_x8TwC1ik", "readable_id": "optimal-angle-for-a-projectile-part-3-horizontal-distance-as-a-function-of-angle-and-speed"}, "z8vj8tUCkxY": {"duration": 432, "path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/radian-and-degree-conversion-practice/", "keywords": "radian, degree, conversion", "id": "z8vj8tUCkxY", "title": "Radian and degree conversion practice", "description": "A little practice converting between radians and degrees and vice versa", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z8vj8tUCkxY.mp4/z8vj8tUCkxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z8vj8tUCkxY.mp4/z8vj8tUCkxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z8vj8tUCkxY.m3u8/z8vj8tUCkxY.m3u8"}, "slug": "radian-and-degree-conversion-practice", "video_id": "z8vj8tUCkxY", "youtube_id": "z8vj8tUCkxY", "readable_id": "radian-and-degree-conversion-practice"}, "r1tggaFV0yo": {"duration": 799, "path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/overview-of-amino-acid-metabolism/", "keywords": "", "id": "r1tggaFV0yo", "title": "Overview of Amino Acid Metabolism", "description": "1D: What is unique about the catabolism of amino acids (vs. glucose and fatty acids)?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/r1tggaFV0yo.mp4/r1tggaFV0yo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/r1tggaFV0yo.mp4/r1tggaFV0yo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/r1tggaFV0yo.m3u8/r1tggaFV0yo.m3u8"}, "slug": "overview-of-amino-acid-metabolism", "video_id": "r1tggaFV0yo", "youtube_id": "r1tggaFV0yo", "readable_id": "overview-of-amino-acid-metabolism"}, "94Gnto5G1PU": {"duration": 156, "path": "khan/math/algebra/algebra-functions/interpreting-function-notation/interpreting-function-notation-example-2/", "keywords": "", "id": "94Gnto5G1PU", "title": "How to interpret an expression with function notation (example with a function that models the number of people at the beach)", "description": "Sal interprets the expression P(5)
0.6", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XHLgY7Z3cb8.mp4/XHLgY7Z3cb8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XHLgY7Z3cb8.mp4/XHLgY7Z3cb8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XHLgY7Z3cb8.m3u8/XHLgY7Z3cb8.m3u8"}, "slug": "rewriting-a-fraction-as-a-decimal", "video_id": "XHLgY7Z3cb8", "youtube_id": "XHLgY7Z3cb8", "readable_id": "rewriting-a-fraction-as-a-decimal"}, "kiQ6MUQZHSs": {"duration": 179, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/reading_data/reading-bar-graphs/", "keywords": "u08_l1_t1_we2, Reading, Bar, Graphs", "id": "kiQ6MUQZHSs", "title": "Reading bar graphs", "description": "Reading Bar Graphs", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kiQ6MUQZHSs.mp4/kiQ6MUQZHSs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kiQ6MUQZHSs.mp4/kiQ6MUQZHSs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kiQ6MUQZHSs.m3u8/kiQ6MUQZHSs.m3u8"}, "slug": "reading-bar-graphs", "video_id": "kiQ6MUQZHSs", "youtube_id": "kiQ6MUQZHSs", "readable_id": "reading-bar-graphs"}, "gnyHsgTFXIY": {"duration": 90, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/reading_data/reading-bar-charts-2/", "keywords": "", "id": "gnyHsgTFXIY", "title": "Reading bar charts: comparing two sets of data", "description": "A bar chart is especially useful with comparing two sets of data. The difference in the bars give us a quick snapshot that allows us to draw some conclusions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gnyHsgTFXIY.mp4/gnyHsgTFXIY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gnyHsgTFXIY.mp4/gnyHsgTFXIY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gnyHsgTFXIY.m3u8/gnyHsgTFXIY.m3u8"}, "slug": "reading-bar-charts-2", "video_id": "gnyHsgTFXIY", "youtube_id": "gnyHsgTFXIY", "readable_id": "reading-bar-charts-2"}, "lG6NWLxDbNo": {"duration": 242, "path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/oil-paint-in-venice/", "keywords": "oil, paint, Venice, art, painting, Bellini", "id": "lG6NWLxDbNo", "title": "Oil paint in Venice", "description": "A review of fresco and tempera and the development of the use of\u00a0oil paint by artists in Venice.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lG6NWLxDbNo.mp4/lG6NWLxDbNo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lG6NWLxDbNo.mp4/lG6NWLxDbNo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lG6NWLxDbNo.m3u8/lG6NWLxDbNo.m3u8"}, "slug": "oil-paint-in-venice", "video_id": "lG6NWLxDbNo", "youtube_id": "lG6NWLxDbNo", "readable_id": "oil-paint-in-venice"}, "WevZMyikGV4": {"duration": 145, "path": "khan/math/early-math/cc-early-math-add-sub-1000/cc-early-math-strategies-for-adding-two-and-three-digit-numbers/exercise-for-numberline-addition-and-subtraction/", "keywords": "education,online learning,learning,lessons", "id": "WevZMyikGV4", "title": "Exercise for number line addition and subtraction", "description": "Some example exercises where you figure out which number line matches up with an addition or subtraction problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WevZMyikGV4.mp4/WevZMyikGV4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WevZMyikGV4.mp4/WevZMyikGV4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WevZMyikGV4.m3u8/WevZMyikGV4.m3u8"}, "slug": "exercise-for-numberline-addition-and-subtraction", "video_id": "WevZMyikGV4", "youtube_id": "WevZMyikGV4", "readable_id": "exercise-for-numberline-addition-and-subtraction"}, "t-4O17cw9cw": {"duration": 180, "path": "khan/test-prep/ap-art-history/africa-ap/elephant-mask/", "keywords": "Bamileke,art,african,Cameroon,Aka,AP,art history,mask,Kuosi,Elephant mask,Central Africa,Africa", "id": "t-4O17cw9cw", "title": "Elephant Mask, Kuosi Society, Bamileke Peoples, Cameroon", "description": "Elephant (Aka) Mask, Kuosi Society, Bamileke Peoples, Grassfields region of Cameroon, 20th century, cloth, beads, raffia, fiber, 146.7 x 52.1 x 29.2 cm (Brooklyn Museum) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/t-4O17cw9cw.mp4/t-4O17cw9cw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/t-4O17cw9cw.mp4/t-4O17cw9cw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/t-4O17cw9cw.m3u8/t-4O17cw9cw.m3u8"}, "slug": "elephant-mask", "video_id": "t-4O17cw9cw", "youtube_id": "t-4O17cw9cw", "readable_id": "elephant-mask"}, "Alhcv5d_XOs": {"duration": 1058, "path": "khan/math/linear-algebra/vectors_and_spaces/linear_independence/more-on-linear-independence/", "keywords": "Linear, Algebra, Vectors, span, combination, dependence, independence", "id": "Alhcv5d_XOs", "title": "More on linear independence", "description": "More examples determining linear dependence or independence.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Alhcv5d_XOs.mp4/Alhcv5d_XOs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Alhcv5d_XOs.mp4/Alhcv5d_XOs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Alhcv5d_XOs.m3u8/Alhcv5d_XOs.m3u8"}, "slug": "more-on-linear-independence", "video_id": "Alhcv5d_XOs", "youtube_id": "Alhcv5d_XOs", "readable_id": "more-on-linear-independence"}, "KDb3YEnM0WY": {"duration": 117, "path": "khan/college-admissions/applying-to-college/admissions-essays/ss-admissions-essay-personal-identity/", "keywords": "", "id": "KDb3YEnM0WY", "title": "Student story: Admissions essay about personal identity", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KDb3YEnM0WY.mp4/KDb3YEnM0WY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KDb3YEnM0WY.mp4/KDb3YEnM0WY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KDb3YEnM0WY.m3u8/KDb3YEnM0WY.m3u8"}, "slug": "ss-admissions-essay-personal-identity", "video_id": "KDb3YEnM0WY", "youtube_id": "KDb3YEnM0WY", "readable_id": "ss-admissions-essay-personal-identity"}, "OFNGpKGg9IQ": {"duration": 398, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/washer-method-rotating-around-non-axis/", "keywords": "", "id": "OFNGpKGg9IQ", "title": "Washer method rotating around non-axis", "description": "Washer method when rotating around a horizontal line that is not the x-axis", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OFNGpKGg9IQ.mp4/OFNGpKGg9IQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OFNGpKGg9IQ.mp4/OFNGpKGg9IQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OFNGpKGg9IQ.m3u8/OFNGpKGg9IQ.m3u8"}, "slug": "washer-method-rotating-around-non-axis", "video_id": "OFNGpKGg9IQ", "youtube_id": "OFNGpKGg9IQ", "readable_id": "washer-method-rotating-around-non-axis"}, "dWY25vb1ZB0": {"duration": 360, "path": "khan/test-prep/mcat/physical-processes/spherical-mirrors/convex-parabolic-mirrors/", "keywords": "Convex, Parabolic, Mirrors, optics", "id": "dWY25vb1ZB0", "title": "Convex parabolic mirrors", "description": "Convex Parabolic Mirrors", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dWY25vb1ZB0.mp4/dWY25vb1ZB0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dWY25vb1ZB0.mp4/dWY25vb1ZB0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dWY25vb1ZB0.m3u8/dWY25vb1ZB0.m3u8"}, "slug": "convex-parabolic-mirrors", "video_id": "dWY25vb1ZB0", "youtube_id": "dWY25vb1ZB0", "readable_id": "convex-parabolic-mirrors"}, "Zm0KaIw-35k": {"duration": 151, "path": "khan/math/pre-algebra/rates-and-ratios/rates_tutorial/finding-unit-rates/", "keywords": "U04_L1_T1_we3, Finding, Unit, Rates, CC_6_RP_2, CC_6_RP_3, CC_7_RP_2_b", "id": "Zm0KaIw-35k", "title": "Solving unit rates problem", "description": "Finding a unit rate is a skill often required in real life. How fast is that plane flying? How many lawns can you mow in an afternoon? You see, with our knowledge of ratios and fractions, we can now solve unit rates problems like this.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Zm0KaIw-35k.mp4/Zm0KaIw-35k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Zm0KaIw-35k.mp4/Zm0KaIw-35k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Zm0KaIw-35k.m3u8/Zm0KaIw-35k.m3u8"}, "slug": "finding-unit-rates", "video_id": "Zm0KaIw-35k", "youtube_id": "Zm0KaIw-35k", "readable_id": "finding-unit-rates"}, "ld8kHvz1yN4": {"duration": 311, "path": "khan/test-prep/ap-art-history/global-prehistory-ap/paleolithic-mesolithic-neolithic/jade-cong/", "keywords": "jade cong neolithic", "id": "ld8kHvz1yN4", "title": "Jade Cong", "description": "Jade Cong, c. 2500 B.C.E., Liangzhu culture, Neolithic period, China (British Museum)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ld8kHvz1yN4.mp4/ld8kHvz1yN4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ld8kHvz1yN4.mp4/ld8kHvz1yN4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ld8kHvz1yN4.m3u8/ld8kHvz1yN4.m3u8"}, "slug": "jade-cong", "video_id": "ld8kHvz1yN4", "youtube_id": "ld8kHvz1yN4", "readable_id": "jade-cong"}, "03fkmtPDhcE": {"duration": 97, "path": "khan/science/discoveries-projects/discovery-lab-2013/lemonade-stand-competitive-markets/", "keywords": "", "id": "03fkmtPDhcE", "title": "DLab: Lemonade stand simulation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/03fkmtPDhcE.mp4/03fkmtPDhcE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/03fkmtPDhcE.mp4/03fkmtPDhcE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/03fkmtPDhcE.m3u8/03fkmtPDhcE.m3u8"}, "slug": "lemonade-stand-competitive-markets", "video_id": "03fkmtPDhcE", "youtube_id": "03fkmtPDhcE", "readable_id": "lemonade-stand-competitive-markets"}, "Phu1yteO-HU": {"duration": 739, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/dissociative-shock/", "keywords": "", "id": "Phu1yteO-HU", "title": "Dissociative shock", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Phu1yteO-HU.mp4/Phu1yteO-HU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Phu1yteO-HU.mp4/Phu1yteO-HU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Phu1yteO-HU.m3u8/Phu1yteO-HU.m3u8"}, "slug": "dissociative-shock", "video_id": "Phu1yteO-HU", "youtube_id": "Phu1yteO-HU", "readable_id": "dissociative-shock"}, "r3ttwvNvors": {"duration": 328, "path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/btheki/", "keywords": "", "id": "r3ttwvNvors", "title": "Constantin Brancusi, The Kiss", "description": "Constantin Brancusi, The Kiss, 1916, limestone, 58.4 x 33.7 x 25.4 cm (Philadelphia Museum of Art)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/r3ttwvNvors.mp4/r3ttwvNvors.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/r3ttwvNvors.mp4/r3ttwvNvors.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/r3ttwvNvors.m3u8/r3ttwvNvors.m3u8"}, "slug": "btheki", "video_id": "r3ttwvNvors", "youtube_id": "r3ttwvNvors", "readable_id": "btheki"}, "NqbkvEK46xM": {"duration": 178, "path": "khan/math/pre-algebra/rates-and-ratios/farenheit-celsius-conversion/converting-farenheit-to-celsius/", "keywords": "Converting, Fahrenheit, to, Celsius, CC_6_RP_3_d", "id": "NqbkvEK46xM", "title": "Converting Fahrenheit to Celsius", "description": "Converting Fahrenheit to Celsius", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NqbkvEK46xM.mp4/NqbkvEK46xM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NqbkvEK46xM.mp4/NqbkvEK46xM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NqbkvEK46xM.m3u8/NqbkvEK46xM.m3u8"}, "slug": "converting-farenheit-to-celsius", "video_id": "NqbkvEK46xM", "youtube_id": "NqbkvEK46xM", "readable_id": "converting-farenheit-to-celsius"}, "765X_PAxhAw": {"duration": 188, "path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/derivative-natural-logarithm/", "keywords": "", "id": "765X_PAxhAw", "title": "Derivative of natural logarithm", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/765X_PAxhAw.mp4/765X_PAxhAw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/765X_PAxhAw.mp4/765X_PAxhAw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/765X_PAxhAw.m3u8/765X_PAxhAw.m3u8"}, "slug": "derivative-natural-logarithm", "video_id": "765X_PAxhAw", "youtube_id": "765X_PAxhAw", "readable_id": "derivative-natural-logarithm"}, "2h6RdAxIMO8": {"duration": 342, "path": "khan/college-admissions/explore-college-options/college-search-type-of-college/comparing-highly-selective-vs-selective-vs-nonselective-colleges/", "keywords": "", "id": "2h6RdAxIMO8", "title": "Comparing highly selective vs selective vs nonselective colleges", "description": "Filter by selectivity using College Board's college search tool", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2h6RdAxIMO8.mp4/2h6RdAxIMO8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2h6RdAxIMO8.mp4/2h6RdAxIMO8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2h6RdAxIMO8.m3u8/2h6RdAxIMO8.m3u8"}, "slug": "comparing-highly-selective-vs-selective-vs-nonselective-colleges", "video_id": "2h6RdAxIMO8", "youtube_id": "2h6RdAxIMO8", "readable_id": "comparing-highly-selective-vs-selective-vs-nonselective-colleges"}, "g7wX-feyWac": {"duration": 72, "path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-aug-5-2014/", "keywords": "", "id": "g7wX-feyWac", "title": "A softer trek to mount sharp", "description": "On the second anniversary of landing, NASA's Curiosity rover on Mars is preparing to navigate through a series of sandy valleys on its way to Mount Sharp. The base of Mount Sharp sits 3 kilometers (1.8 miles) from the rover's current position.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/g7wX-feyWac.mp4/g7wX-feyWac.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/g7wX-feyWac.mp4/g7wX-feyWac.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/g7wX-feyWac.m3u8/g7wX-feyWac.m3u8"}, "slug": "curiosity-rover-report-aug-5-2014", "video_id": "g7wX-feyWac", "youtube_id": "g7wX-feyWac", "readable_id": "curiosity-rover-report-aug-5-2014"}, "a-LoetNvu0U": {"duration": 47, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-12/", "keywords": "", "id": "a-LoetNvu0U", "title": "11 Bacteria in a dish", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a-LoetNvu0U.mp4/a-LoetNvu0U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a-LoetNvu0U.mp4/a-LoetNvu0U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a-LoetNvu0U.m3u8/a-LoetNvu0U.m3u8"}, "slug": "sat-2010-may-6-12", "video_id": "a-LoetNvu0U", "youtube_id": "a-LoetNvu0U", "readable_id": "sat-2010-may-6-12"}, "BINElq3DFkg": {"duration": 88, "path": "khan/math/pre-algebra/decimals-pre-alg/comparing-decimals-pre-alg/another-ordering-decimals-example/", "keywords": "", "id": "BINElq3DFkg", "title": "Comparing decimals: ordering from smallest to biggest", "description": "Let's move the decimals around and reorder them from least to greatest. Hint: look at one place value and then compare it to the decimals before moving on to the next place value.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BINElq3DFkg.mp4/BINElq3DFkg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BINElq3DFkg.mp4/BINElq3DFkg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BINElq3DFkg.m3u8/BINElq3DFkg.m3u8"}, "slug": "another-ordering-decimals-example", "video_id": "BINElq3DFkg", "youtube_id": "BINElq3DFkg", "readable_id": "another-ordering-decimals-example"}, "rgqFXkLAc-4": {"duration": 736, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-15-more-on-the-fed-funds-rate/", "keywords": "federal, reserve, funds, money, suplly, m0, m1, open, market, operations", "id": "rgqFXkLAc-4", "title": "Banking 15: More on the Fed funds rate", "description": "More on the mechanics of the Federal Funds rate and how it increases the money supply.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rgqFXkLAc-4.mp4/rgqFXkLAc-4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rgqFXkLAc-4.mp4/rgqFXkLAc-4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rgqFXkLAc-4.m3u8/rgqFXkLAc-4.m3u8"}, "slug": "banking-15-more-on-the-fed-funds-rate", "video_id": "rgqFXkLAc-4", "youtube_id": "rgqFXkLAc-4", "readable_id": "banking-15-more-on-the-fed-funds-rate"}, "7SnmUoVhYqw": {"duration": 177, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p6-easier/", "keywords": "", "id": "7SnmUoVhYqw", "title": "Operations with polynomials \u2014 Basic example", "description": "Watch Sal work through a basic Operations with polynomials problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7SnmUoVhYqw.mp4/7SnmUoVhYqw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7SnmUoVhYqw.mp4/7SnmUoVhYqw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7SnmUoVhYqw.m3u8/7SnmUoVhYqw.m3u8"}, "slug": "sat-math-p6-easier", "video_id": "7SnmUoVhYqw", "youtube_id": "7SnmUoVhYqw", "readable_id": "sat-math-p6-easier"}, "zz4KbvF_X-0": {"duration": 889, "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/specific-heat-heat-of-fusion-and-vaporization/", "keywords": "chemistry, specific, heat, phase, changes", "id": "zz4KbvF_X-0", "title": "Specific heat, heat of fusion and vaporization example", "description": "Specific heat and phase changes: Calculating how much heat is needed to convert 200 g of ice at -10 degrees C to 110 degree steam.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/zz4KbvF_X-0.mp4/zz4KbvF_X-0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/zz4KbvF_X-0.mp4/zz4KbvF_X-0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/zz4KbvF_X-0.m3u8/zz4KbvF_X-0.m3u8"}, "slug": "specific-heat-heat-of-fusion-and-vaporization", "video_id": "zz4KbvF_X-0", "youtube_id": "zz4KbvF_X-0", "readable_id": "specific-heat-heat-of-fusion-and-vaporization"}, "QIAI6KOwKII": {"duration": 688, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/what-is-a-stroke/", "keywords": "", "id": "QIAI6KOwKII", "title": "What is a stroke?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QIAI6KOwKII.mp4/QIAI6KOwKII.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QIAI6KOwKII.mp4/QIAI6KOwKII.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QIAI6KOwKII.m3u8/QIAI6KOwKII.m3u8"}, "slug": "what-is-a-stroke", "video_id": "QIAI6KOwKII", "youtube_id": "QIAI6KOwKII", "readable_id": "what-is-a-stroke"}, "6Ozz3J-LRrY": {"duration": 333, "path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/shell-method-for-rotating-around-vertical-line/", "keywords": "", "id": "6Ozz3J-LRrY", "title": "Shell method for rotating around vertical line", "description": "Introducing the shell method for rotation around a vertical line.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6Ozz3J-LRrY.mp4/6Ozz3J-LRrY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6Ozz3J-LRrY.mp4/6Ozz3J-LRrY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6Ozz3J-LRrY.m3u8/6Ozz3J-LRrY.m3u8"}, "slug": "shell-method-for-rotating-around-vertical-line", "video_id": "6Ozz3J-LRrY", "youtube_id": "6Ozz3J-LRrY", "readable_id": "shell-method-for-rotating-around-vertical-line"}, "_9x2cqO7-Ig": {"duration": 608, "path": "khan/math/multivariable-calculus/line_integrals_topic/2d_divergence_theorem/constructing-a-unit-normal-vector-to-a-curve/", "keywords": "vector, calculus, normal, tanget, unti", "id": "_9x2cqO7-Ig", "title": "Constructing a unit normal vector to a curve", "description": "Figuring out a unit normal vector at any point along a curve defined by a position vector function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_9x2cqO7-Ig.mp4/_9x2cqO7-Ig.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_9x2cqO7-Ig.mp4/_9x2cqO7-Ig.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_9x2cqO7-Ig.m3u8/_9x2cqO7-Ig.m3u8"}, "slug": "constructing-a-unit-normal-vector-to-a-curve", "video_id": "_9x2cqO7-Ig", "youtube_id": "_9x2cqO7-Ig", "readable_id": "constructing-a-unit-normal-vector-to-a-curve"}, "aASSUcUSBro": {"duration": 821, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/upper-motor-neurons/", "keywords": "MCAT", "id": "aASSUcUSBro", "title": "Upper motor neurons", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aASSUcUSBro.mp4/aASSUcUSBro.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aASSUcUSBro.mp4/aASSUcUSBro.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aASSUcUSBro.m3u8/aASSUcUSBro.m3u8"}, "slug": "upper-motor-neurons", "video_id": "aASSUcUSBro", "youtube_id": "aASSUcUSBro", "readable_id": "upper-motor-neurons"}, "nVPrWz8Jfgo": {"duration": 190, "path": "khan/test-prep/mcat/physical-processes/stoichiometry/specific-gravity/", "keywords": "", "id": "nVPrWz8Jfgo", "title": "Specific gravity", "description": "In this video David explains what specific gravity means. He also shows how to calculate the value for specific gravity and use it to determine the percent of an object that will be submerged while floating.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nVPrWz8Jfgo.mp4/nVPrWz8Jfgo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nVPrWz8Jfgo.mp4/nVPrWz8Jfgo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nVPrWz8Jfgo.m3u8/nVPrWz8Jfgo.m3u8"}, "slug": "specific-gravity", "video_id": "nVPrWz8Jfgo", "youtube_id": "nVPrWz8Jfgo", "readable_id": "specific-gravity"}, "utmUAjvl4kc": {"duration": 82, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p7-easier/", "keywords": "", "id": "utmUAjvl4kc", "title": "Radical and rational equations \u2014 Basic example", "description": "Watch Sal work through a basic Radical and rational equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/utmUAjvl4kc.mp4/utmUAjvl4kc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/utmUAjvl4kc.mp4/utmUAjvl4kc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/utmUAjvl4kc.m3u8/utmUAjvl4kc.m3u8"}, "slug": "sat-math-p7-easier", "video_id": "utmUAjvl4kc", "youtube_id": "utmUAjvl4kc", "readable_id": "sat-math-p7-easier"}, "4fBXIcO0It4": {"duration": 144, "path": "khan/math/precalculus/prob_comb/independent_events_precalc/compound-events-tree-diagram/", "keywords": "", "id": "4fBXIcO0It4", "title": "Compound events example with tree diagram", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4fBXIcO0It4.mp4/4fBXIcO0It4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4fBXIcO0It4.mp4/4fBXIcO0It4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4fBXIcO0It4.m3u8/4fBXIcO0It4.m3u8"}, "slug": "compound-events-tree-diagram", "video_id": "4fBXIcO0It4", "youtube_id": "4fBXIcO0It4", "readable_id": "compound-events-tree-diagram"}, "OelluIKIkCY": {"duration": 431, "path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/shell-method-with-two-functions-of-y/", "keywords": "", "id": "OelluIKIkCY", "title": "Shell method with two functions of y", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OelluIKIkCY.mp4/OelluIKIkCY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OelluIKIkCY.mp4/OelluIKIkCY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OelluIKIkCY.m3u8/OelluIKIkCY.m3u8"}, "slug": "shell-method-with-two-functions-of-y", "video_id": "OelluIKIkCY", "youtube_id": "OelluIKIkCY", "readable_id": "shell-method-with-two-functions-of-y"}, "5S03uylNn-Q": {"duration": 559, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-trace-and-determinant/", "keywords": "2010, IIT, JEE, Paper, Problem, 43, Trace, and, Determinant", "id": "5S03uylNn-Q", "title": "IIT JEE trace and determinant", "description": "2010 IIT JEE Paper 1 Problem 43 Trace and Determinant", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5S03uylNn-Q.mp4/5S03uylNn-Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5S03uylNn-Q.mp4/5S03uylNn-Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5S03uylNn-Q.m3u8/5S03uylNn-Q.m3u8"}, "slug": "iit-jee-trace-and-determinant", "video_id": "5S03uylNn-Q", "youtube_id": "5S03uylNn-Q", "readable_id": "iit-jee-trace-and-determinant"}, "LXaPt9i9hqk": {"duration": 532, "path": "khan/test-prep/mcat/cells/cell-membrane-overview/cell-membrane-overview-fluid-mosaic-model/", "keywords": "", "id": "LXaPt9i9hqk", "title": "Cell membrane overview and fluid mosaic model", "description": "Learn about the major components that make up our cell membrane and the fluid mosaic model. By William Tsai.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LXaPt9i9hqk.mp4/LXaPt9i9hqk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LXaPt9i9hqk.mp4/LXaPt9i9hqk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LXaPt9i9hqk.m3u8/LXaPt9i9hqk.m3u8"}, "slug": "cell-membrane-overview-fluid-mosaic-model", "video_id": "LXaPt9i9hqk", "youtube_id": "LXaPt9i9hqk", "readable_id": "cell-membrane-overview-fluid-mosaic-model"}, "H-E5rlpCVu4": {"duration": 427, "path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/angles-formed-by-parallel-lines-and-transversals/", "keywords": "alternate, interior, angles, exterior", "id": "H-E5rlpCVu4", "title": "Angles formed by parallel lines and transversals", "description": "Parallel lines, transversal lines, corresponding angles", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/H-E5rlpCVu4.mp4/H-E5rlpCVu4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/H-E5rlpCVu4.mp4/H-E5rlpCVu4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/H-E5rlpCVu4.m3u8/H-E5rlpCVu4.m3u8"}, "slug": "angles-formed-by-parallel-lines-and-transversals", "video_id": "H-E5rlpCVu4", "youtube_id": "H-E5rlpCVu4", "readable_id": "angles-formed-by-parallel-lines-and-transversals"}, "aUUi1DrghQc": {"duration": 309, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/asthma-shortterm-treatment/", "keywords": "", "id": "aUUi1DrghQc", "title": "Asthma shortterm treatments", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/aUUi1DrghQc.mp4/aUUi1DrghQc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/aUUi1DrghQc.mp4/aUUi1DrghQc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/aUUi1DrghQc.m3u8/aUUi1DrghQc.m3u8"}, "slug": "asthma-shortterm-treatment", "video_id": "aUUi1DrghQc", "youtube_id": "aUUi1DrghQc", "readable_id": "asthma-shortterm-treatment"}, "MOHzzgQLkk8": {"duration": 817, "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/newman-projection-practice-1/", "keywords": "", "id": "MOHzzgQLkk8", "title": "Newman projection practice 1", "description": "How to use Newman projections to determine the most and least stable conformations of a compound", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MOHzzgQLkk8.mp4/MOHzzgQLkk8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MOHzzgQLkk8.mp4/MOHzzgQLkk8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MOHzzgQLkk8.m3u8/MOHzzgQLkk8.m3u8"}, "slug": "newman-projection-practice-1", "video_id": "MOHzzgQLkk8", "youtube_id": "MOHzzgQLkk8", "readable_id": "newman-projection-practice-1"}, "K0sjZ5nqQ7g": {"duration": 563, "path": "khan/test-prep/mcat/physical-processes/thin-lenses/convex-lenses/", "keywords": "Convex, Lenses, optics", "id": "K0sjZ5nqQ7g", "title": "Convex lenses", "description": "Convex Lenses", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K0sjZ5nqQ7g.mp4/K0sjZ5nqQ7g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K0sjZ5nqQ7g.mp4/K0sjZ5nqQ7g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K0sjZ5nqQ7g.m3u8/K0sjZ5nqQ7g.m3u8"}, "slug": "convex-lenses", "video_id": "K0sjZ5nqQ7g", "youtube_id": "K0sjZ5nqQ7g", "readable_id": "convex-lenses"}, "EATkbpqlxvc": {"duration": 819, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/what-is-coronary-artery-disease/", "keywords": "", "id": "EATkbpqlxvc", "title": "What is coronary artery disease?", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EATkbpqlxvc.mp4/EATkbpqlxvc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EATkbpqlxvc.mp4/EATkbpqlxvc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EATkbpqlxvc.m3u8/EATkbpqlxvc.m3u8"}, "slug": "what-is-coronary-artery-disease", "video_id": "EATkbpqlxvc", "youtube_id": "EATkbpqlxvc", "readable_id": "what-is-coronary-artery-disease"}, "O3A47Il5h1A": {"duration": 360, "path": "khan/science/health-and-medicine/healthcare-misc/spotting-salty-foods/", "keywords": "", "id": "O3A47Il5h1A", "title": "Spotting salty foods", "description": "Find out how much sodium is in some common foods and how you can maintain a low sodium diet. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O3A47Il5h1A.mp4/O3A47Il5h1A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O3A47Il5h1A.mp4/O3A47Il5h1A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O3A47Il5h1A.m3u8/O3A47Il5h1A.m3u8"}, "slug": "spotting-salty-foods", "video_id": "O3A47Il5h1A", "youtube_id": "O3A47Il5h1A", "readable_id": "spotting-salty-foods"}, "eji8zKa7H7s": {"duration": 777, "path": "khan/test-prep/mcat/physical-processes/thin-lenses/diopters-aberration-and-the-human-eye/", "keywords": "", "id": "eji8zKa7H7s", "title": "Diopters, Aberration, and the Human Eye", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eji8zKa7H7s.mp4/eji8zKa7H7s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eji8zKa7H7s.mp4/eji8zKa7H7s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eji8zKa7H7s.m3u8/eji8zKa7H7s.m3u8"}, "slug": "diopters-aberration-and-the-human-eye", "video_id": "eji8zKa7H7s", "youtube_id": "eji8zKa7H7s", "readable_id": "diopters-aberration-and-the-human-eye"}, "BfVjTOjvI30": {"duration": 513, "path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/showing-relation-between-basis-cols-and-pivot-cols/", "keywords": "column, space, matrix, dimension, rank", "id": "BfVjTOjvI30", "title": "Showing relation between basis cols and pivot cols", "description": "Showing that linear independence of pivot columns implies linear independence of the corresponding columns in the original equation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BfVjTOjvI30.mp4/BfVjTOjvI30.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BfVjTOjvI30.mp4/BfVjTOjvI30.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BfVjTOjvI30.m3u8/BfVjTOjvI30.m3u8"}, "slug": "showing-relation-between-basis-cols-and-pivot-cols", "video_id": "BfVjTOjvI30", "youtube_id": "BfVjTOjvI30", "readable_id": "showing-relation-between-basis-cols-and-pivot-cols"}, "DseIYQdjzgE": {"duration": 303, "path": "khan/test-prep/ap-art-history/global-contemporary/xubing-book/", "keywords": "Xu Bing, Book from the Sky, print, letterpress, ink, paper, book, scrolls", "id": "DseIYQdjzgE", "title": "Xu Bing, Book from the Sky", "description": "Xu Bing, Book from the Sky, c. 1987-91, hand-printed books and ceiling and wall scrolls printed from wood letterpress type; ink on paper, each book, open: 18 1/8 \u00d7 20 inches / 46 \u00d7 51 cm; each of three ceiling scrolls 38 inches \u00d7 c. 114 feet 9-7/8 inches / 96.5 \u00d7 3500 cm; each wall scroll 9 feet 2-1/4 inches \u00d7 39-3/8 inches / 280 \u00d7 100 cm (installation at the Metropolitan Museum of Art, 2014), collection of the artist, \u00a9 Xu Bing\nSpeakers: Allison Young and Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DseIYQdjzgE.mp4/DseIYQdjzgE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DseIYQdjzgE.mp4/DseIYQdjzgE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DseIYQdjzgE.m3u8/DseIYQdjzgE.m3u8"}, "slug": "xubing-book", "video_id": "DseIYQdjzgE", "youtube_id": "DseIYQdjzgE", "readable_id": "xubing-book"}, "BTNarhvGX88": {"duration": 748, "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-13-open-market-operations/", "keywords": "Open, market, reserve, requirement, money, supply, m0, m1", "id": "BTNarhvGX88", "title": "Banking 13: Open market operations", "description": "Tools of the Central Bank to increase the money supply.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BTNarhvGX88.mp4/BTNarhvGX88.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BTNarhvGX88.mp4/BTNarhvGX88.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BTNarhvGX88.m3u8/BTNarhvGX88.m3u8"}, "slug": "banking-13-open-market-operations", "video_id": "BTNarhvGX88", "youtube_id": "BTNarhvGX88", "readable_id": "banking-13-open-market-operations"}, "6UqtgH_Zy1Y": {"duration": 700, "path": "khan/science/biology/structure-of-a-cell/tour-of-organelles/endoplasmic-reticulum-and-golgi-bodies/", "keywords": "", "id": "6UqtgH_Zy1Y", "title": "Endoplasmic reticulum and Golgi bodies", "description": "Structure of the endoplasmic reticulum and Golgi body (Golgi apparatus), and how they function in secretion of proteins from the cell.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6UqtgH_Zy1Y.mp4/6UqtgH_Zy1Y.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6UqtgH_Zy1Y.mp4/6UqtgH_Zy1Y.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6UqtgH_Zy1Y.m3u8/6UqtgH_Zy1Y.m3u8"}, "slug": "endoplasmic-reticulum-and-golgi-bodies", "video_id": "6UqtgH_Zy1Y", "youtube_id": "6UqtgH_Zy1Y", "readable_id": "endoplasmic-reticulum-and-golgi-bodies"}, "JLTde8PxhQ8": {"duration": 116, "path": "khan/partner-content/exploratorium/sound-explo/vocal-visualizer/vocal-visualizer-whats-going-on/", "keywords": "", "id": "JLTde8PxhQ8", "title": "What\u2019s going on: Transforming vibrating air molecules into patterns you can see", "description": "What\u2019s the science? This activity transforms the vibrating air molecules from your voice into Lissajous patterns, allowing you to visualize harmonic motions and resonant vibration modes.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JLTde8PxhQ8.mp4/JLTde8PxhQ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JLTde8PxhQ8.mp4/JLTde8PxhQ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JLTde8PxhQ8.m3u8/JLTde8PxhQ8.m3u8"}, "slug": "vocal-visualizer-whats-going-on", "video_id": "JLTde8PxhQ8", "youtube_id": "JLTde8PxhQ8", "readable_id": "vocal-visualizer-whats-going-on"}, "pMMRE4Q2FGk": {"duration": 454, "path": "khan/test-prep/mcat/processing-the-environment/cognition/information-processing-model-sensory-working-and-long-term-memory/", "keywords": "", "id": "pMMRE4Q2FGk", "title": "Information processing model: Sensory, working, and long term memory", "description": "Learn about the information processing model of human memory.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pMMRE4Q2FGk.mp4/pMMRE4Q2FGk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pMMRE4Q2FGk.mp4/pMMRE4Q2FGk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pMMRE4Q2FGk.m3u8/pMMRE4Q2FGk.m3u8"}, "slug": "information-processing-model-sensory-working-and-long-term-memory", "video_id": "pMMRE4Q2FGk", "youtube_id": "pMMRE4Q2FGk", "readable_id": "information-processing-model-sensory-working-and-long-term-memory"}, "kzpDXYJXNy0": {"duration": 217, "path": "khan/partner-content/wi-phi/critical-thinking/denying-the-antecedent/", "keywords": "", "id": "kzpDXYJXNy0", "title": "Fallacies: Denying the Antecedent", "description": "In this video, Matthew C. Harris explains the fallacy of denying the antecedent, the formal fallacy that arises from inferring the inverse of a conditional statement. He also explains why graduate students might also be humans.\n\nSpeaker: Matthew C. Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kzpDXYJXNy0.mp4/kzpDXYJXNy0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kzpDXYJXNy0.mp4/kzpDXYJXNy0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kzpDXYJXNy0.m3u8/kzpDXYJXNy0.m3u8"}, "slug": "denying-the-antecedent", "video_id": "kzpDXYJXNy0", "youtube_id": "kzpDXYJXNy0", "readable_id": "denying-the-antecedent"}, "lt3nPxVTC5M": {"duration": 721, "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/preterm-labor/", "keywords": "", "id": "lt3nPxVTC5M", "title": "Preterm labor", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lt3nPxVTC5M.mp4/lt3nPxVTC5M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lt3nPxVTC5M.mp4/lt3nPxVTC5M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lt3nPxVTC5M.m3u8/lt3nPxVTC5M.m3u8"}, "slug": "preterm-labor", "video_id": "lt3nPxVTC5M", "youtube_id": "lt3nPxVTC5M", "readable_id": "preterm-labor"}, "BGIkU1yzBNM": {"duration": 573, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/arterial-elastance-ea-and-afterload/", "keywords": "", "id": "BGIkU1yzBNM", "title": "Arterial elastance (Ea) and afterload", "description": "First, learn the difference between arterial elastance (Ea) and afterload. Then, understand how Ea is affected by changes in afterload, and in turn, how the PV loop can shift. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BGIkU1yzBNM.mp4/BGIkU1yzBNM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BGIkU1yzBNM.mp4/BGIkU1yzBNM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BGIkU1yzBNM.m3u8/BGIkU1yzBNM.m3u8"}, "slug": "arterial-elastance-ea-and-afterload", "video_id": "BGIkU1yzBNM", "youtube_id": "BGIkU1yzBNM", "readable_id": "arterial-elastance-ea-and-afterload"}, "lCRePFf4zNs": {"duration": 582, "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/acute-leukemias/", "keywords": "", "id": "lCRePFf4zNs", "title": "Acute leukemia", "description": "Acute leukemias affect specialized blood cells at the most immature stage in their growth. Acute lymphoblastic leukemias (ALL) are the most common cancer in children and is often associated with people who have down syndrome. Learn about B-cell ALL and T-cell ALL, as well as the different acute myeloid leukemias.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/lCRePFf4zNs.mp4/lCRePFf4zNs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/lCRePFf4zNs.mp4/lCRePFf4zNs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/lCRePFf4zNs.m3u8/lCRePFf4zNs.m3u8"}, "slug": "acute-leukemias", "video_id": "lCRePFf4zNs", "youtube_id": "lCRePFf4zNs", "readable_id": "acute-leukemias"}, "y7YPTD7QwR4": {"duration": 455, "path": "khan/test-prep/mcat/society-and-culture/demographics/social-movements/", "keywords": "", "id": "y7YPTD7QwR4", "title": "Social movements", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/y7YPTD7QwR4.mp4/y7YPTD7QwR4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/y7YPTD7QwR4.mp4/y7YPTD7QwR4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/y7YPTD7QwR4.m3u8/y7YPTD7QwR4.m3u8"}, "slug": "social-movements", "video_id": "y7YPTD7QwR4", "youtube_id": "y7YPTD7QwR4", "readable_id": "social-movements"}, "LU_6amWC6H8": {"duration": 241, "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/cash-accrual-accounting/comparing-accrual-and-cash-accounting/", "keywords": "accrual, cash, accounting", "id": "LU_6amWC6H8", "title": "Comparing accrual and cash accounting", "description": "Comparing Accrual and Cash Accounting", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LU_6amWC6H8.mp4/LU_6amWC6H8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LU_6amWC6H8.mp4/LU_6amWC6H8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LU_6amWC6H8.m3u8/LU_6amWC6H8.m3u8"}, "slug": "comparing-accrual-and-cash-accounting", "video_id": "LU_6amWC6H8", "youtube_id": "LU_6amWC6H8", "readable_id": "comparing-accrual-and-cash-accounting"}, "sqnrJMTp9dc": {"duration": 124, "path": "khan/humanities/art-history-basics/artists-materials-techniques/ceramics-glass/glassmaking-technique-free-blown-glass/", "keywords": "", "id": "sqnrJMTp9dc", "title": "Glassmaking technique: free-blown glass", "description": "Ancient glass makers near Jerusalem discovered they could inflate hot glass to make vessels quickly and more cheaply. Watch this ancient technique (footage from the Corning Museum of Glass). Love art? Follow us on Google+", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sqnrJMTp9dc.mp4/sqnrJMTp9dc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sqnrJMTp9dc.mp4/sqnrJMTp9dc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sqnrJMTp9dc.m3u8/sqnrJMTp9dc.m3u8"}, "slug": "glassmaking-technique-free-blown-glass", "video_id": "sqnrJMTp9dc", "youtube_id": "sqnrJMTp9dc", "readable_id": "glassmaking-technique-free-blown-glass"}, "vFfriC55fFw": {"duration": 678, "path": "khan/science/organic-chemistry/aromatic-compounds/reactions-benzene/friedel-crafts-acylation/", "keywords": "Friedel, Crafts, Acylation, Acetyl, Chloride, Benzene, Electrophilic, Aromatic, Substitution", "id": "vFfriC55fFw", "title": "Friedel crafts acylation", "description": "Friedel Crafts Acylation", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vFfriC55fFw.mp4/vFfriC55fFw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vFfriC55fFw.mp4/vFfriC55fFw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vFfriC55fFw.m3u8/vFfriC55fFw.m3u8"}, "slug": "friedel-crafts-acylation", "video_id": "vFfriC55fFw", "youtube_id": "vFfriC55fFw", "readable_id": "friedel-crafts-acylation"}, "mX91_3GQqLY": {"duration": 467, "path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/proof-that-square-root-of-2-is-irrational/", "keywords": "", "id": "mX91_3GQqLY", "title": "Proof that square root of 2 is irrational", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mX91_3GQqLY.mp4/mX91_3GQqLY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mX91_3GQqLY.mp4/mX91_3GQqLY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mX91_3GQqLY.m3u8/mX91_3GQqLY.m3u8"}, "slug": "proof-that-square-root-of-2-is-irrational", "video_id": "mX91_3GQqLY", "youtube_id": "mX91_3GQqLY", "readable_id": "proof-that-square-root-of-2-is-irrational"}, "RpOHZc6cDIw": {"duration": 493, "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables/why-gravity-gets-so-strong-near-dense-objects/", "keywords": "Why, Gravity, Gets, So, Strong, Near, Dense, Objects, Black, hole, marquee", "id": "RpOHZc6cDIw", "title": "Why gravity gets so strong near dense objects", "description": "Why Gravity Gets So Strong Near Dense Objects", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RpOHZc6cDIw.mp4/RpOHZc6cDIw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RpOHZc6cDIw.mp4/RpOHZc6cDIw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RpOHZc6cDIw.m3u8/RpOHZc6cDIw.m3u8"}, "slug": "why-gravity-gets-so-strong-near-dense-objects", "video_id": "RpOHZc6cDIw", "youtube_id": "RpOHZc6cDIw", "readable_id": "why-gravity-gets-so-strong-near-dense-objects"}, "muiNDpURT9M": {"duration": 412, "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/skeletal-structure-and-function/", "keywords": "", "id": "muiNDpURT9M", "title": "Skeletal structure and function", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/muiNDpURT9M.mp4/muiNDpURT9M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/muiNDpURT9M.mp4/muiNDpURT9M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/muiNDpURT9M.m3u8/muiNDpURT9M.m3u8"}, "slug": "skeletal-structure-and-function", "video_id": "muiNDpURT9M", "youtube_id": "muiNDpURT9M", "readable_id": "skeletal-structure-and-function"}, "MEGyRgYJKEY": {"duration": 970, "path": "khan/humanities/history/euro-hist/cold-war/korean-war-overview/", "keywords": "kim, il, sung, syngman, rhee, macarthur, truman", "id": "MEGyRgYJKEY", "title": "Korean War overview", "description": "Korean War Overview", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MEGyRgYJKEY.mp4/MEGyRgYJKEY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MEGyRgYJKEY.mp4/MEGyRgYJKEY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MEGyRgYJKEY.m3u8/MEGyRgYJKEY.m3u8"}, "slug": "korean-war-overview", "video_id": "MEGyRgYJKEY", "youtube_id": "MEGyRgYJKEY", "readable_id": "korean-war-overview"}, "-Xv593jgyJ4": {"duration": 501, "path": "khan/test-prep/mcat/behavior/psychological-disorders/personality-disorders/", "keywords": "Personality Disorder (Disease Or Medical Condition),Personality (Quotation Subject),Health (Industry),Mental Illness (Disease Or Medical Condition)", "id": "-Xv593jgyJ4", "title": "Personality disorders", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-Xv593jgyJ4.mp4/-Xv593jgyJ4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-Xv593jgyJ4.mp4/-Xv593jgyJ4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-Xv593jgyJ4.m3u8/-Xv593jgyJ4.m3u8"}, "slug": "personality-disorders", "video_id": "-Xv593jgyJ4", "youtube_id": "-Xv593jgyJ4", "readable_id": "personality-disorders"}, "Qst1UVtq8pE": {"duration": 317, "path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/constructing-linear-and-exponential-functions-from-data/", "keywords": "", "id": "Qst1UVtq8pE", "title": "How to construct linear and basic exponential functions from a table of values (example)", "description": "Sal constructs a linear function of the form f(x)=mx+b and an exponential function of the form g(x)=a*r^x, given a table of values of those functions.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Qst1UVtq8pE.mp4/Qst1UVtq8pE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Qst1UVtq8pE.mp4/Qst1UVtq8pE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Qst1UVtq8pE.m3u8/Qst1UVtq8pE.m3u8"}, "slug": "constructing-linear-and-exponential-functions-from-data", "video_id": "Qst1UVtq8pE", "youtube_id": "Qst1UVtq8pE", "readable_id": "constructing-linear-and-exponential-functions-from-data"}, "rMYdKz4xxMc": {"duration": 300, "path": "khan/partner-content/wi-phi/metaphys-epistemology/the-true-self/", "keywords": "", "id": "rMYdKz4xxMc", "title": "Mind: The True Self", "description": "Does our ordinary notion of a \u201ctrue self\u201d simply pick out a certain part of the mind? Or is this notion actually wrapped up in some inextricable way with our own values and ideals?\n\nSpeaker: Dr.\u00a0Joshua Knobe,\u00a0Professor of Philosophy and Cognitive Science, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rMYdKz4xxMc.mp4/rMYdKz4xxMc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rMYdKz4xxMc.mp4/rMYdKz4xxMc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rMYdKz4xxMc.m3u8/rMYdKz4xxMc.m3u8"}, "slug": "the-true-self", "video_id": "rMYdKz4xxMc", "youtube_id": "rMYdKz4xxMc", "readable_id": "the-true-self"}, "rYG1D5lUE4I": {"duration": 404, "path": "khan/math/precalculus/imaginary_complex_precalc/i_precalc/i-as-the-principal-root-of-1-a-little-technical/", "keywords": "complex, imagnary, numbers", "id": "rYG1D5lUE4I", "title": "i as the principal root of -1 (a little technical)", "description": "i as the principal square root of -1", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rYG1D5lUE4I.mp4/rYG1D5lUE4I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rYG1D5lUE4I.mp4/rYG1D5lUE4I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rYG1D5lUE4I.m3u8/rYG1D5lUE4I.m3u8"}, "slug": "i-as-the-principal-root-of-1-a-little-technical", "video_id": "rYG1D5lUE4I", "youtube_id": "rYG1D5lUE4I", "readable_id": "i-as-the-principal-root-of-1-a-little-technical"}, "JCdbCdwqXbc": {"duration": 103, "path": "khan/math/early-math/cc-early-math-measure-data-topic/cc-early-math-bar-graphs/solving-problems-with-bar-graphs-2/", "keywords": "", "id": "JCdbCdwqXbc", "title": "Solving problems with bar graphs 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JCdbCdwqXbc.mp4/JCdbCdwqXbc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JCdbCdwqXbc.mp4/JCdbCdwqXbc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JCdbCdwqXbc.m3u8/JCdbCdwqXbc.m3u8"}, "slug": "solving-problems-with-bar-graphs-2", "video_id": "JCdbCdwqXbc", "youtube_id": "JCdbCdwqXbc", "readable_id": "solving-problems-with-bar-graphs-2"}, "9zspW8u6kQM": {"duration": 595, "path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/radians-and-degrees/", "keywords": "Trigonometry, radian, degree, math, khan", "id": "9zspW8u6kQM", "title": "Radians and degrees", "description": "What a radian is. Converting radians to degrees and vice versa.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9zspW8u6kQM.mp4/9zspW8u6kQM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9zspW8u6kQM.mp4/9zspW8u6kQM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9zspW8u6kQM.m3u8/9zspW8u6kQM.m3u8"}, "slug": "radians-and-degrees", "video_id": "9zspW8u6kQM", "youtube_id": "9zspW8u6kQM", "readable_id": "radians-and-degrees"}, "D1eibbfAEVk": {"duration": 481, "path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/hawaiian-islands-formation/", "keywords": "geology, mantle, plume, marquee", "id": "D1eibbfAEVk", "title": "Hawaiian islands formation", "description": "Hawaiian Islands formed by stationary hot spot under Pacific plate", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D1eibbfAEVk.mp4/D1eibbfAEVk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D1eibbfAEVk.mp4/D1eibbfAEVk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D1eibbfAEVk.m3u8/D1eibbfAEVk.m3u8"}, "slug": "hawaiian-islands-formation", "video_id": "D1eibbfAEVk", "youtube_id": "D1eibbfAEVk", "readable_id": "hawaiian-islands-formation"}, "Hkmsu9Tl7NE": {"duration": 461, "path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-structure-of-society-sex-gender-and-sexual-orientation/", "keywords": "", "id": "Hkmsu9Tl7NE", "title": "Demographic structure of society - sex, gender, and sexual orientation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Hkmsu9Tl7NE.mp4/Hkmsu9Tl7NE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Hkmsu9Tl7NE.mp4/Hkmsu9Tl7NE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Hkmsu9Tl7NE.m3u8/Hkmsu9Tl7NE.m3u8"}, "slug": "demographic-structure-of-society-sex-gender-and-sexual-orientation", "video_id": "Hkmsu9Tl7NE", "youtube_id": "Hkmsu9Tl7NE", "readable_id": "demographic-structure-of-society-sex-gender-and-sexual-orientation"}, "cbZEsg56mdo": {"duration": 217, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q4-harder/", "keywords": "", "id": "cbZEsg56mdo", "title": "Scatterplots \u2014 Harder example", "description": "Watch Sal work through a harder Scatterplots problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cbZEsg56mdo.mp4/cbZEsg56mdo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cbZEsg56mdo.mp4/cbZEsg56mdo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cbZEsg56mdo.m3u8/cbZEsg56mdo.m3u8"}, "slug": "sat-math-q4-harder", "video_id": "cbZEsg56mdo", "youtube_id": "cbZEsg56mdo", "readable_id": "sat-math-q4-harder"}, "XdYgyO0RmFI": {"duration": 527, "path": "khan/humanities/art-history-basics/art-1010/19-century-art/", "keywords": "Romanticism, Realism, Impressionism, Post-Impressionism, Symbolism", "id": "XdYgyO0RmFI", "title": "Nineteenth-century art", "description": "A video from the Utah System of Higher Education (with special thanks to Dr. Nancy Ross)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XdYgyO0RmFI.mp4/XdYgyO0RmFI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XdYgyO0RmFI.mp4/XdYgyO0RmFI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XdYgyO0RmFI.m3u8/XdYgyO0RmFI.m3u8"}, "slug": "19-century-art", "video_id": "XdYgyO0RmFI", "youtube_id": "XdYgyO0RmFI", "readable_id": "19-century-art"}, "D8cHdto-G-I": {"duration": 270, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/claude-monet-cliff-walk-at-pourville-1882/", "keywords": "Monet, Impressionism, Pourville, France, Art Institute of Chicago, Seaside, Cliff, Claude Monet, Khan Academy, smarthistory, art history, Google Art Project, OER, painting", "id": "D8cHdto-G-I", "title": "Monet, Cliff Walk at Pourville", "description": "Claude Monet, Cliff Walk at Pourville, 1882, oil on canvas, 26-1/8 x 32-7/16 inches / 66.5 x 82.3 cm (Art Institute of Chicago)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D8cHdto-G-I.mp4/D8cHdto-G-I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D8cHdto-G-I.mp4/D8cHdto-G-I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D8cHdto-G-I.m3u8/D8cHdto-G-I.m3u8"}, "slug": "claude-monet-cliff-walk-at-pourville-1882", "video_id": "D8cHdto-G-I", "youtube_id": "D8cHdto-G-I", "readable_id": "claude-monet-cliff-walk-at-pourville-1882"}, "Xc3oHzKXVh8": {"duration": 734, "path": "khan/math/geometry/congruence/theorems-using-triangle-congruence/congruent-triangle-example-2/", "keywords": "congruent, triangles, ASA, SSS, SAS, AAS", "id": "Xc3oHzKXVh8", "title": "How to prove general theorems using triangle congruence (example)", "description": "Sal proves that two pairs of segments are congruent using the ASA and AAS congruence criteria.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Xc3oHzKXVh8.mp4/Xc3oHzKXVh8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Xc3oHzKXVh8.mp4/Xc3oHzKXVh8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Xc3oHzKXVh8.m3u8/Xc3oHzKXVh8.m3u8"}, "slug": "congruent-triangle-example-2", "video_id": "Xc3oHzKXVh8", "youtube_id": "Xc3oHzKXVh8", "readable_id": "congruent-triangle-example-2"}, "xF_hJaXUNfE": {"duration": 719, "path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/binomial-theorem-part-3/", "keywords": "binomial, combinatorics, CC_39336_A-APR_5", "id": "xF_hJaXUNfE", "title": "Binomial theorem combinatorics connection", "description": "Intuition behind why binomial expansion involves combinatorics", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/xF_hJaXUNfE.mp4/xF_hJaXUNfE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/xF_hJaXUNfE.mp4/xF_hJaXUNfE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/xF_hJaXUNfE.m3u8/xF_hJaXUNfE.m3u8"}, "slug": "binomial-theorem-part-3", "video_id": "xF_hJaXUNfE", "youtube_id": "xF_hJaXUNfE", "readable_id": "binomial-theorem-part-3"}, "bnGjN-Xsg9U": {"duration": 412, "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/introduction-to-exponential-decay-edited/", "keywords": "", "id": "bnGjN-Xsg9U", "title": "Introduction to exponential decay", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bnGjN-Xsg9U.mp4/bnGjN-Xsg9U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bnGjN-Xsg9U.mp4/bnGjN-Xsg9U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bnGjN-Xsg9U.m3u8/bnGjN-Xsg9U.m3u8"}, "slug": "introduction-to-exponential-decay-edited", "video_id": "bnGjN-Xsg9U", "youtube_id": "bnGjN-Xsg9U", "readable_id": "introduction-to-exponential-decay-edited"}, "uA6mcx4FMN8": {"duration": 866, "path": "khan/math/algebra/quadratics/quadratic_odds_ends/ca-algebra-i-quadratic-roots/", "keywords": "algebra, x-intercept, quadratic, function", "id": "uA6mcx4FMN8", "title": "CA Algebra I: Quadratic roots", "description": "58-62, x-intercepts of a quadratic function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uA6mcx4FMN8.mp4/uA6mcx4FMN8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uA6mcx4FMN8.mp4/uA6mcx4FMN8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uA6mcx4FMN8.m3u8/uA6mcx4FMN8.m3u8"}, "slug": "ca-algebra-i-quadratic-roots", "video_id": "uA6mcx4FMN8", "youtube_id": "uA6mcx4FMN8", "readable_id": "ca-algebra-i-quadratic-roots"}, "w6AWQb3r9o8": {"duration": 67, "path": "khan/science/discoveries-projects/discoveries/batteries/electrode-surface-area/", "keywords": "surface area", "id": "w6AWQb3r9o8", "title": "Electrode (surface area test)", "description": "What's the difference between one piece of metal and three pieces of metal in our cell. Does deflection change? Why?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w6AWQb3r9o8.mp4/w6AWQb3r9o8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w6AWQb3r9o8.mp4/w6AWQb3r9o8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w6AWQb3r9o8.m3u8/w6AWQb3r9o8.m3u8"}, "slug": "electrode-surface-area", "video_id": "w6AWQb3r9o8", "youtube_id": "w6AWQb3r9o8", "readable_id": "electrode-surface-area"}, "AnATlMVA12E": {"duration": 199, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/futures-and-forward-curves/", "keywords": "normal, inverted, futures, forward, curves", "id": "AnATlMVA12E", "title": "Futures and forward curves", "description": "Normal and Inverted Futures Curves", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AnATlMVA12E.mp4/AnATlMVA12E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AnATlMVA12E.mp4/AnATlMVA12E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AnATlMVA12E.m3u8/AnATlMVA12E.m3u8"}, "slug": "futures-and-forward-curves", "video_id": "AnATlMVA12E", "youtube_id": "AnATlMVA12E", "readable_id": "futures-and-forward-curves"}, "XQTIKNXDAao": {"duration": 833, "path": "khan/science/discoveries-projects/reverse-engin/reverse-engineering/what-is-inside-a-coffee-maker/", "keywords": "Ni-Chrome wire, Nickel-Chrome alloy, switch, housing, injection molding, PP, polypropylene, vent, filter, grill, insulation, thermal fuse, bi-metallic switch, heat, cost reduced, inexpensive, rectifier, copper coil, glass, stainless steel, coffee, maker", "id": "XQTIKNXDAao", "title": "What is inside a coffee maker?", "description": "In this video we explore what is inside a coffee maker, how it is made, and how it works.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XQTIKNXDAao.mp4/XQTIKNXDAao.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XQTIKNXDAao.mp4/XQTIKNXDAao.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XQTIKNXDAao.m3u8/XQTIKNXDAao.m3u8"}, "slug": "what-is-inside-a-coffee-maker", "video_id": "XQTIKNXDAao", "youtube_id": "XQTIKNXDAao", "readable_id": "what-is-inside-a-coffee-maker"}, "BuqcKpe5ZQs": {"duration": 990, "path": "khan/math/linear-algebra/matrix_transformations/composition_of_transformations/compositions-of-linear-transformations-2/", "keywords": "matrix, products, composition", "id": "BuqcKpe5ZQs", "title": "Compositions of linear transformations 2", "description": "Providing the motivation for definition of matrix products", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BuqcKpe5ZQs.mp4/BuqcKpe5ZQs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BuqcKpe5ZQs.mp4/BuqcKpe5ZQs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BuqcKpe5ZQs.m3u8/BuqcKpe5ZQs.m3u8"}, "slug": "compositions-of-linear-transformations-2", "video_id": "BuqcKpe5ZQs", "youtube_id": "BuqcKpe5ZQs", "readable_id": "compositions-of-linear-transformations-2"}, "2h8XiqSnzaU": {"duration": 101, "path": "khan/math/pre-algebra/fractions-pre-alg/mixed-numbers-pre-alg/proper-and-improper-fractions/", "keywords": "u2_l1_t2_we1, Proper, and, Improper, Fractions, CC_3_G_2, CC_4_NF_4_a", "id": "2h8XiqSnzaU", "title": "Proper and improper fractions", "description": "Proper and Improper Fractions", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2h8XiqSnzaU.mp4/2h8XiqSnzaU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2h8XiqSnzaU.mp4/2h8XiqSnzaU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2h8XiqSnzaU.m3u8/2h8XiqSnzaU.m3u8"}, "slug": "proper-and-improper-fractions", "video_id": "2h8XiqSnzaU", "youtube_id": "2h8XiqSnzaU", "readable_id": "proper-and-improper-fractions"}, "NdRl1C6Jr5o": {"duration": 689, "path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/keto-enol-tautomerization-2/", "keywords": "", "id": "NdRl1C6Jr5o", "title": "Keto-enol tautomerization (by Jay)", "description": "Mechanisms for acid and base catalyzed keto-enol tautomerization. By Jay.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NdRl1C6Jr5o.mp4/NdRl1C6Jr5o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NdRl1C6Jr5o.mp4/NdRl1C6Jr5o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NdRl1C6Jr5o.m3u8/NdRl1C6Jr5o.m3u8"}, "slug": "keto-enol-tautomerization-2", "video_id": "NdRl1C6Jr5o", "youtube_id": "NdRl1C6Jr5o", "readable_id": "keto-enol-tautomerization-2"}, "8183HPmA2_I": {"duration": 335, "path": "khan/science/biology/her/tree-of-life/human-prehistory-101-part-1-out-of-eastern-africa/", "keywords": "genetics, dna, testing, kit, genome, test, prehistory, ancestry, decode, navigenics, genomics", "id": "8183HPmA2_I", "title": "Human prehistory 101 part 1: Out of (eastern) Africa", "description": "Second in a series of videos that introduces human prehistory, this video describes how our human ancestors spread throughout Africa and then into other regions such as Australia and Europe. How did they reach Australia so early on? What happened when our ancestors encountered Neanderthals?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/8183HPmA2_I.mp4/8183HPmA2_I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/8183HPmA2_I.mp4/8183HPmA2_I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/8183HPmA2_I.m3u8/8183HPmA2_I.m3u8"}, "slug": "human-prehistory-101-part-1-out-of-eastern-africa", "video_id": "8183HPmA2_I", "youtube_id": "8183HPmA2_I", "readable_id": "human-prehistory-101-part-1-out-of-eastern-africa"}, "pInFesXIfg8": {"duration": 582, "path": "khan/math/differential-calculus/derivative_applications/critical_points_graphing/identifying-minima-and-maxima-for-x-3-12x-5/", "keywords": "", "id": "pInFesXIfg8", "title": "Identifying minima and maxima for x^3 - 12x + 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pInFesXIfg8.mp4/pInFesXIfg8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pInFesXIfg8.mp4/pInFesXIfg8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pInFesXIfg8.m3u8/pInFesXIfg8.m3u8"}, "slug": "identifying-minima-and-maxima-for-x-3-12x-5", "video_id": "pInFesXIfg8", "youtube_id": "pInFesXIfg8", "readable_id": "identifying-minima-and-maxima-for-x-3-12x-5"}, "eUF59jCFcyQ": {"duration": 663, "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/big-bang-introduction/", "keywords": "Big, Bang, Introduction", "id": "eUF59jCFcyQ", "title": "Big bang introduction", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eUF59jCFcyQ.mp4/eUF59jCFcyQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eUF59jCFcyQ.mp4/eUF59jCFcyQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eUF59jCFcyQ.m3u8/eUF59jCFcyQ.m3u8"}, "slug": "big-bang-introduction", "video_id": "eUF59jCFcyQ", "youtube_id": "eUF59jCFcyQ", "readable_id": "big-bang-introduction"}, "ZvLo4bGRJQE": {"duration": 122, "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2008-may-4-7/", "keywords": "", "id": "ZvLo4bGRJQE", "title": "7 Solution to simultaneous equations", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZvLo4bGRJQE.mp4/ZvLo4bGRJQE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZvLo4bGRJQE.mp4/ZvLo4bGRJQE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZvLo4bGRJQE.m3u8/ZvLo4bGRJQE.m3u8"}, "slug": "sat-2008-may-4-7", "video_id": "ZvLo4bGRJQE", "youtube_id": "ZvLo4bGRJQE", "readable_id": "sat-2008-may-4-7"}, "t3cJYNdQLYg": {"duration": 1006, "path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/line-integrals-and-vector-fields/", "keywords": "work, calculus, vector, field", "id": "t3cJYNdQLYg", "title": "Line integrals and vector fields", "description": "Using line integrals to find the work done on a particle moving through a vector field", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/t3cJYNdQLYg.mp4/t3cJYNdQLYg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/t3cJYNdQLYg.mp4/t3cJYNdQLYg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/t3cJYNdQLYg.m3u8/t3cJYNdQLYg.m3u8"}, "slug": "line-integrals-and-vector-fields", "video_id": "t3cJYNdQLYg", "youtube_id": "t3cJYNdQLYg", "readable_id": "line-integrals-and-vector-fields"}, "qOYCeAlukMk": {"duration": 483, "path": "khan/test-prep/mcat/processing-the-environment/emotion/three-components-of-emotion-and-the-universal-emotions/", "keywords": "", "id": "qOYCeAlukMk", "title": "Three components of emotion and the universal emotions", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qOYCeAlukMk.mp4/qOYCeAlukMk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qOYCeAlukMk.mp4/qOYCeAlukMk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qOYCeAlukMk.m3u8/qOYCeAlukMk.m3u8"}, "slug": "three-components-of-emotion-and-the-universal-emotions", "video_id": "qOYCeAlukMk", "youtube_id": "qOYCeAlukMk", "readable_id": "three-components-of-emotion-and-the-universal-emotions"}, "oj8Lkb-61BI": {"duration": 395, "path": "khan/test-prep/mcat/behavior/theories-personality/situational-approach/", "keywords": "", "id": "oj8Lkb-61BI", "title": "Situational approach", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oj8Lkb-61BI.mp4/oj8Lkb-61BI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oj8Lkb-61BI.mp4/oj8Lkb-61BI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oj8Lkb-61BI.m3u8/oj8Lkb-61BI.m3u8"}, "slug": "situational-approach", "video_id": "oj8Lkb-61BI", "youtube_id": "oj8Lkb-61BI", "readable_id": "situational-approach"}, "AwKTZK8gqZI": {"duration": 695, "path": "khan/test-prep/gmat/problem-solving/gmat-math-51/", "keywords": "GMAT, Math", "id": "AwKTZK8gqZI", "title": "GMAT: Math 51", "description": "237-239, pg. 185", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AwKTZK8gqZI.mp4/AwKTZK8gqZI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AwKTZK8gqZI.mp4/AwKTZK8gqZI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AwKTZK8gqZI.m3u8/AwKTZK8gqZI.m3u8"}, "slug": "gmat-math-51", "video_id": "AwKTZK8gqZI", "youtube_id": "AwKTZK8gqZI", "readable_id": "gmat-math-51"}, "RhzXX5PbsuQ": {"duration": 130, "path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/using-multiple-logarithm-properties-to-simplify/", "keywords": "u18_l2_t2_we4, Using, Multiple, Logarithm, Properties, to, Simplify", "id": "RhzXX5PbsuQ", "title": "Using multiple logarithm properties to simplify", "description": "Using Multiple Logarithm Properties to Simplify", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/RhzXX5PbsuQ.mp4/RhzXX5PbsuQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/RhzXX5PbsuQ.mp4/RhzXX5PbsuQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/RhzXX5PbsuQ.m3u8/RhzXX5PbsuQ.m3u8"}, "slug": "using-multiple-logarithm-properties-to-simplify", "video_id": "RhzXX5PbsuQ", "youtube_id": "RhzXX5PbsuQ", "readable_id": "using-multiple-logarithm-properties-to-simplify"}, "jFSenp9ueaI": {"duration": 348, "path": "khan/math/algebra/introduction-to-algebra/units-algebra/unit-conversion-with-fractions/", "keywords": "u6_l1_t1_we1, Unit, Conversion, with, Fractions", "id": "jFSenp9ueaI", "title": "Unit conversion word problem: yards to inches", "description": "In this example, we need to convert from yards to inches. We'll do it a couple of ways.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jFSenp9ueaI.mp4/jFSenp9ueaI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jFSenp9ueaI.mp4/jFSenp9ueaI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jFSenp9ueaI.m3u8/jFSenp9ueaI.m3u8"}, "slug": "unit-conversion-with-fractions", "video_id": "jFSenp9ueaI", "youtube_id": "jFSenp9ueaI", "readable_id": "unit-conversion-with-fractions"}, "wiVWafc3JBM": {"duration": 761, "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex3-part-3-top-surface/", "keywords": "surface, integrals", "id": "wiVWafc3JBM", "title": "Surface integral ex3 part 3: Top surface", "description": "Parametrizing the top surface", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wiVWafc3JBM.mp4/wiVWafc3JBM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wiVWafc3JBM.mp4/wiVWafc3JBM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wiVWafc3JBM.m3u8/wiVWafc3JBM.m3u8"}, "slug": "surface-integral-ex3-part-3-top-surface", "video_id": "wiVWafc3JBM", "youtube_id": "wiVWafc3JBM", "readable_id": "surface-integral-ex3-part-3-top-surface"}, "C_OxZpaOShg": {"duration": 162, "path": "khan/humanities/art-africa/north-a/algeria-and-libya/rock-art-tadrart-acacus-unesconhk/", "keywords": "NHK,UNESCO,World,Heritage,Patrimoine,mondial,convention,documentary,documentaire", "id": "C_OxZpaOShg", "title": "Rock-Art Sites of Tadrart Acacus (UNESCO/NHK)", "description": "On the borders of Tassili N'Ajjer in Algeria, also a World Heritage site, this rocky massif has thousands of cave paintings in very different styles, dating from 12,000 B.C. to A.D. 100. They reflect marked changes in the fauna and flora, and also the different ways of life of the populations that succeeded one another in this region of the Sahara.\n\nSource: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai\nURL: http://whc.unesco.org/en/list/287/", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/C_OxZpaOShg.mp4/C_OxZpaOShg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/C_OxZpaOShg.mp4/C_OxZpaOShg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/C_OxZpaOShg.m3u8/C_OxZpaOShg.m3u8"}, "slug": "rock-art-tadrart-acacus-unesconhk", "video_id": "C_OxZpaOShg", "youtube_id": "C_OxZpaOShg", "readable_id": "rock-art-tadrart-acacus-unesconhk"}, "w2QVg9mezcY": {"duration": 528, "path": "khan/science/health-and-medicine/healthcare-misc/ritual-of-the-bedside-exam/", "keywords": "medicine, verghese", "id": "w2QVg9mezcY", "title": "Ritual of the bedside exam", "description": "Dr. Abraham Verghese explains the ritual of the bedside exam", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/w2QVg9mezcY.mp4/w2QVg9mezcY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/w2QVg9mezcY.mp4/w2QVg9mezcY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/w2QVg9mezcY.m3u8/w2QVg9mezcY.m3u8"}, "slug": "ritual-of-the-bedside-exam", "video_id": "w2QVg9mezcY", "youtube_id": "w2QVg9mezcY", "readable_id": "ritual-of-the-bedside-exam"}, "Q0tTfe2lKIc": {"duration": 420, "path": "khan/math/algebra/systems-of-linear-equations/systems-of-linear-equations-word-problems/system-of-equations-distances-word-problem/", "keywords": "education,online learning,learning,lessons", "id": "Q0tTfe2lKIc", "title": "How to solve a word problem with a system of equations (example)", "description": "Sal solves a word problem about distances walking and riding bus to school, by creating a system of equations and solving it.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Q0tTfe2lKIc.mp4/Q0tTfe2lKIc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Q0tTfe2lKIc.mp4/Q0tTfe2lKIc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Q0tTfe2lKIc.m3u8/Q0tTfe2lKIc.m3u8"}, "slug": "system-of-equations-distances-word-problem", "video_id": "Q0tTfe2lKIc", "youtube_id": "Q0tTfe2lKIc", "readable_id": "system-of-equations-distances-word-problem"}, "U7HQ_G_N6vo": {"duration": 585, "path": "khan/math/multivariable-calculus/partial_derivatives_topic/gradient/gradient-1/", "keywords": "vector, gradient", "id": "U7HQ_G_N6vo", "title": "Gradient 1", "description": "Introduction to the gradient", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/U7HQ_G_N6vo.mp4/U7HQ_G_N6vo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/U7HQ_G_N6vo.mp4/U7HQ_G_N6vo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/U7HQ_G_N6vo.m3u8/U7HQ_G_N6vo.m3u8"}, "slug": "gradient-1", "video_id": "U7HQ_G_N6vo", "youtube_id": "U7HQ_G_N6vo", "readable_id": "gradient-1"}, "iuaYuCreEPk": {"duration": 611, "path": "khan/science/biology/properties-of-carbon/hydrocarbon-structures-and-functional-groups/functional-groups/", "keywords": "education,online learning,learning,lessons,functional groups,hydroxyl,sulfhydryl,carbonyl,amino,phosphat", "id": "iuaYuCreEPk", "title": "Functional groups", "description": "Hydroxyl, sulfhydryl, carbonyl, carboxyl, amino and phosphate groups. Alcohols and thiols.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/iuaYuCreEPk.mp4/iuaYuCreEPk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/iuaYuCreEPk.mp4/iuaYuCreEPk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/iuaYuCreEPk.m3u8/iuaYuCreEPk.m3u8"}, "slug": "functional-groups", "video_id": "iuaYuCreEPk", "youtube_id": "iuaYuCreEPk", "readable_id": "functional-groups"}, "umoSO56Nwa8": {"duration": 295, "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/dvorak-three/", "keywords": "", "id": "umoSO56Nwa8", "title": "Antoni\u0301n Dvor\u030ca\u0301k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 3)", "description": "Watch the full performance here", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/umoSO56Nwa8.mp4/umoSO56Nwa8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/umoSO56Nwa8.mp4/umoSO56Nwa8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/umoSO56Nwa8.m3u8/umoSO56Nwa8.m3u8"}, "slug": "dvorak-three", "video_id": "umoSO56Nwa8", "youtube_id": "umoSO56Nwa8", "readable_id": "dvorak-three"}, "BKGx8GMVu88": {"duration": 698, "path": "khan/economics-finance-domain/core-finance/interest-tutorial/cont-comp-int-and-e/e-through-compound-interest/", "keywords": "", "id": "BKGx8GMVu88", "title": "e and compound interest", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BKGx8GMVu88.mp4/BKGx8GMVu88.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BKGx8GMVu88.mp4/BKGx8GMVu88.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BKGx8GMVu88.m3u8/BKGx8GMVu88.m3u8"}, "slug": "e-through-compound-interest", "video_id": "BKGx8GMVu88", "youtube_id": "BKGx8GMVu88", "readable_id": "e-through-compound-interest"}, "tVcasOt55Lc": {"duration": 298, "path": "khan/math/geometry/cc-geometry-circles/circles/length-of-an-arc-that-subtends-a-central-angle/", "keywords": "", "id": "tVcasOt55Lc", "title": "Length of an arc that subtends a central angle", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/tVcasOt55Lc.mp4/tVcasOt55Lc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/tVcasOt55Lc.mp4/tVcasOt55Lc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/tVcasOt55Lc.m3u8/tVcasOt55Lc.m3u8"}, "slug": "length-of-an-arc-that-subtends-a-central-angle", "video_id": "tVcasOt55Lc", "youtube_id": "tVcasOt55Lc", "readable_id": "length-of-an-arc-that-subtends-a-central-angle"}, "Pj3HdzOR2pY": {"duration": 267, "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/bruegel-hunters/", "keywords": "", "id": "Pj3HdzOR2pY", "title": "Bruegel, Hunters in the Snow (Winter)", "description": "Pieter Bruegel the Elder, Hunters in the Snow (Winter), 1565, oil on wood, 118 x 161 cm (Kunsthistorisches Museum, Vienna),\u00a0Speakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Pj3HdzOR2pY.mp4/Pj3HdzOR2pY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Pj3HdzOR2pY.mp4/Pj3HdzOR2pY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Pj3HdzOR2pY.m3u8/Pj3HdzOR2pY.m3u8"}, "slug": "bruegel-hunters", "video_id": "Pj3HdzOR2pY", "youtube_id": "Pj3HdzOR2pY", "readable_id": "bruegel-hunters"}, "Vc09LURoMQ8": {"duration": 915, "path": "khan/math/geometry/triangle-properties/medians_centroids/triangle-medians-and-centroids-2d-proof/", "keywords": "centroid, geometry, proof, median, triangle", "id": "Vc09LURoMQ8", "title": "Triangle medians and centroids (2D proof)", "description": "Showing that the centroid is 2/3 of the way along a median", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Vc09LURoMQ8.mp4/Vc09LURoMQ8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Vc09LURoMQ8.mp4/Vc09LURoMQ8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Vc09LURoMQ8.m3u8/Vc09LURoMQ8.m3u8"}, "slug": "triangle-medians-and-centroids-2d-proof", "video_id": "Vc09LURoMQ8", "youtube_id": "Vc09LURoMQ8", "readable_id": "triangle-medians-and-centroids-2d-proof"}, "EncR_T0faKM": {"duration": 242, "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-painting-technique-pollock/", "keywords": "", "id": "EncR_T0faKM", "title": "The Painting Techniques of Jackson Pollock", "description": "Learn about the drip-style painting techniques of one of America's most iconic and influential painters. To learn more and create your own works, take our online course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EncR_T0faKM.mp4/EncR_T0faKM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EncR_T0faKM.mp4/EncR_T0faKM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EncR_T0faKM.m3u8/EncR_T0faKM.m3u8"}, "slug": "moma-painting-technique-pollock", "video_id": "EncR_T0faKM", "youtube_id": "EncR_T0faKM", "readable_id": "moma-painting-technique-pollock"}, "-J--4Jc5FB0": {"duration": 462, "path": "khan/science/health-and-medicine/infectious-diseases/influenza/genetic-shift-in-flu/", "keywords": "", "id": "-J--4Jc5FB0", "title": "Genetic shift in flu", "description": "Find out how the genetic material in the Type A flu virus can get shuffled around to create brand new types of viruses! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-J--4Jc5FB0.mp4/-J--4Jc5FB0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-J--4Jc5FB0.mp4/-J--4Jc5FB0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-J--4Jc5FB0.m3u8/-J--4Jc5FB0.m3u8"}, "slug": "genetic-shift-in-flu", "video_id": "-J--4Jc5FB0", "youtube_id": "-J--4Jc5FB0", "readable_id": "genetic-shift-in-flu"}, "K5ggNnKTmNM": {"duration": 712, "path": "khan/math/algebra/quadratics/quadratic_odds_ends/ca-algebra-i-factoring-quadratics/", "keywords": "algebra, factoring, quadratic", "id": "K5ggNnKTmNM", "title": "CA Algebra I: Factoring quadratics", "description": "44-47, factoring quadratics", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K5ggNnKTmNM.mp4/K5ggNnKTmNM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K5ggNnKTmNM.mp4/K5ggNnKTmNM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K5ggNnKTmNM.m3u8/K5ggNnKTmNM.m3u8"}, "slug": "ca-algebra-i-factoring-quadratics", "video_id": "K5ggNnKTmNM", "youtube_id": "K5ggNnKTmNM", "readable_id": "ca-algebra-i-factoring-quadratics"}, "mekBhhFWC9c": {"duration": 482, "path": "khan/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials/factoring-5th-degree-polynomial-to-find-real-zeros/", "keywords": "", "id": "mekBhhFWC9c", "title": "Factoring 5th degree polynomial to find real zeros", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mekBhhFWC9c.mp4/mekBhhFWC9c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mekBhhFWC9c.mp4/mekBhhFWC9c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mekBhhFWC9c.m3u8/mekBhhFWC9c.m3u8"}, "slug": "factoring-5th-degree-polynomial-to-find-real-zeros", "video_id": "mekBhhFWC9c", "youtube_id": "mekBhhFWC9c", "readable_id": "factoring-5th-degree-polynomial-to-find-real-zeros"}, "MyzGVbCHh5M": {"duration": 856, "path": "khan/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/inscribed-and-central-angles/", "keywords": "geometry, inscribed, central, angle, subtend, arc", "id": "MyzGVbCHh5M", "title": "Inscribed and central angles", "description": "Showing that an inscribed angle is half of a central angle that subtends the same arc", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MyzGVbCHh5M.mp4/MyzGVbCHh5M.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MyzGVbCHh5M.mp4/MyzGVbCHh5M.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MyzGVbCHh5M.m3u8/MyzGVbCHh5M.m3u8"}, "slug": "inscribed-and-central-angles", "video_id": "MyzGVbCHh5M", "youtube_id": "MyzGVbCHh5M", "readable_id": "inscribed-and-central-angles"}, "rIVCuC-Etc0": {"duration": 731, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/action-potentials-in-cardiac-myocytes/", "keywords": "", "id": "rIVCuC-Etc0", "title": "Action potentials in cardiac myocytes", "description": "See how muscle cells in the heart contract by allowing Calcium to flow inside and bringing along some positive charge with it! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rIVCuC-Etc0.mp4/rIVCuC-Etc0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rIVCuC-Etc0.mp4/rIVCuC-Etc0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rIVCuC-Etc0.m3u8/rIVCuC-Etc0.m3u8"}, "slug": "action-potentials-in-cardiac-myocytes", "video_id": "rIVCuC-Etc0", "youtube_id": "rIVCuC-Etc0", "readable_id": "action-potentials-in-cardiac-myocytes"}, "S4n-tQZnU6o": {"duration": 1004, "path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverting-matrices-part-2/", "keywords": "inverting, inverse, matrix, matrices", "id": "S4n-tQZnU6o", "title": "Classic video on inverting a 3x3 matrix part 1", "description": "Inverting a 3x3 matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/S4n-tQZnU6o.mp4/S4n-tQZnU6o.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/S4n-tQZnU6o.mp4/S4n-tQZnU6o.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/S4n-tQZnU6o.m3u8/S4n-tQZnU6o.m3u8"}, "slug": "inverting-matrices-part-2", "video_id": "S4n-tQZnU6o", "youtube_id": "S4n-tQZnU6o", "readable_id": "inverting-matrices-part-2"}, "o5iot_ZsoV0": {"duration": 399, "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/consumption-function/consumption-function-basics/", "keywords": "macroeconomics, MPC", "id": "o5iot_ZsoV0", "title": "Consumption function basics", "description": "The basic idea of a consumption function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/o5iot_ZsoV0.mp4/o5iot_ZsoV0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/o5iot_ZsoV0.mp4/o5iot_ZsoV0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/o5iot_ZsoV0.m3u8/o5iot_ZsoV0.m3u8"}, "slug": "consumption-function-basics", "video_id": "o5iot_ZsoV0", "youtube_id": "o5iot_ZsoV0", "readable_id": "consumption-function-basics"}, "oOIqk5hXBt4": {"duration": 568, "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/peripheral-somatosensation/", "keywords": "MCAT", "id": "oOIqk5hXBt4", "title": "Peripheral somatosensation", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/oOIqk5hXBt4.mp4/oOIqk5hXBt4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/oOIqk5hXBt4.mp4/oOIqk5hXBt4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/oOIqk5hXBt4.m3u8/oOIqk5hXBt4.m3u8"}, "slug": "peripheral-somatosensation", "video_id": "oOIqk5hXBt4", "youtube_id": "oOIqk5hXBt4", "readable_id": "peripheral-somatosensation"}, "pCGnyaa5E5g": {"duration": 414, "path": "khan/partner-content/wi-phi/critical-thinking/critical-thinking-truth-and-validity/", "keywords": "", "id": "pCGnyaa5E5g", "title": "Fundamentals: Truth and Validity", "description": "In this video, Julianne Chung explains the philosophical concepts of truth and validity before going on to illustrate how truth and falsity, as well as validity and invalidity, can appear in various combinations in an argument. She then introduces the concept of a sound argument (i.e., a valid argument whose premises are all true) and presents one reason to think that valid arguments with false premises are also of interest. \u00a0For more detailed discussions of validity and soundness, please be sure to have a look at the videos on these topics by Paul Henne (Duke University) and Aaron Ancell (Duke University), respectively.\n\nSpeaker: Julianne Chung, Yale University", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/pCGnyaa5E5g.mp4/pCGnyaa5E5g.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/pCGnyaa5E5g.mp4/pCGnyaa5E5g.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/pCGnyaa5E5g.m3u8/pCGnyaa5E5g.m3u8"}, "slug": "critical-thinking-truth-and-validity", "video_id": "pCGnyaa5E5g", "youtube_id": "pCGnyaa5E5g", "readable_id": "critical-thinking-truth-and-validity"}, "WegXPG-h8Ng": {"duration": 279, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/voltage-as-an-intensive-property-edited/", "keywords": "", "id": "WegXPG-h8Ng", "title": "Voltage as an intensive property", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WegXPG-h8Ng.mp4/WegXPG-h8Ng.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WegXPG-h8Ng.mp4/WegXPG-h8Ng.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WegXPG-h8Ng.m3u8/WegXPG-h8Ng.m3u8"}, "slug": "voltage-as-an-intensive-property-edited", "video_id": "WegXPG-h8Ng", "youtube_id": "WegXPG-h8Ng", "readable_id": "voltage-as-an-intensive-property-edited"}, "17pfZUlAqow": {"duration": 692, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/what-is-hiv-and-aids/", "keywords": "HIV (Disease Cause),AIDS (Disease Or Medical Condition),Health (Industry),Medicine (Field Of Study),Disease (Cause Of Death)", "id": "17pfZUlAqow", "title": "What is HIV and AIDS?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/17pfZUlAqow.mp4/17pfZUlAqow.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/17pfZUlAqow.mp4/17pfZUlAqow.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/17pfZUlAqow.m3u8/17pfZUlAqow.m3u8"}, "slug": "what-is-hiv-and-aids", "video_id": "17pfZUlAqow", "youtube_id": "17pfZUlAqow", "readable_id": "what-is-hiv-and-aids"}, "ePWrbBJgssw": {"duration": 249, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/hypertensive-crisis/", "keywords": "Hypertensive Emergency (Disease Or Medical Condition),Hypertension (Disease Or Medical Condition),Health (Industry)", "id": "ePWrbBJgssw", "title": "Hypertensive crisis", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ePWrbBJgssw.mp4/ePWrbBJgssw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ePWrbBJgssw.mp4/ePWrbBJgssw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ePWrbBJgssw.m3u8/ePWrbBJgssw.m3u8"}, "slug": "hypertensive-crisis", "video_id": "ePWrbBJgssw", "youtube_id": "ePWrbBJgssw", "readable_id": "hypertensive-crisis"}, "yTGEMoaWDCQ": {"duration": 1564, "path": "khan/math/probability/statistics-inferential/normal_distribution/normal-distribution-excel-exercise/", "keywords": "statistics, normal, distribution, binomial, CC_6_SP_5_d, CC_7_SP_2", "id": "yTGEMoaWDCQ", "title": "Normal distribution excel exercise", "description": "(Long-26 minutes) Presentation on spreadsheet to show that the normal distribution approximates the binomial distribution for a large number of trials.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yTGEMoaWDCQ.mp4/yTGEMoaWDCQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yTGEMoaWDCQ.mp4/yTGEMoaWDCQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yTGEMoaWDCQ.m3u8/yTGEMoaWDCQ.m3u8"}, "slug": "normal-distribution-excel-exercise", "video_id": "yTGEMoaWDCQ", "youtube_id": "yTGEMoaWDCQ", "readable_id": "normal-distribution-excel-exercise"}, "qkLzAXUP_K0": {"duration": 426, "path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/electron-configuration-d-block/", "keywords": "", "id": "qkLzAXUP_K0", "title": "Electron configuration for d block element", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qkLzAXUP_K0.mp4/qkLzAXUP_K0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qkLzAXUP_K0.mp4/qkLzAXUP_K0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qkLzAXUP_K0.m3u8/qkLzAXUP_K0.m3u8"}, "slug": "electron-configuration-d-block", "video_id": "qkLzAXUP_K0", "youtube_id": "qkLzAXUP_K0", "readable_id": "electron-configuration-d-block"}, "HiphWQfB6J0": {"duration": 215, "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/accumulating-foreign-currency-reserves/", "keywords": "Accumulating, Foreign, Currency, Reserves", "id": "HiphWQfB6J0", "title": "Accumulating foreign currency reserves", "description": "How and why a central bank would build foreign currency reserves", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/HiphWQfB6J0.mp4/HiphWQfB6J0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/HiphWQfB6J0.mp4/HiphWQfB6J0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/HiphWQfB6J0.m3u8/HiphWQfB6J0.m3u8"}, "slug": "accumulating-foreign-currency-reserves", "video_id": "HiphWQfB6J0", "youtube_id": "HiphWQfB6J0", "readable_id": "accumulating-foreign-currency-reserves"}, "PKh5B9xyzSc": {"duration": 347, "path": "khan/math/algebra-basics/core-algebra-foundations/core-algebra-foundations-fractions/adding-fractions-with-unlike-denominators-word-problem/", "keywords": "", "id": "PKh5B9xyzSc", "title": "Adding fractions with unlike denominators word problem", "description": "Cindy and Michael need 1 gallon of orange paint for the giant cardboard pumpkin they are making for Halloween. Cindy has 2/5 of a gallon of red paint. Michael has 1/2 of a gallon of yellow paint. If they mix their paints together, will they have the 1 gallon they need?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PKh5B9xyzSc.mp4/PKh5B9xyzSc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PKh5B9xyzSc.mp4/PKh5B9xyzSc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PKh5B9xyzSc.m3u8/PKh5B9xyzSc.m3u8"}, "slug": "adding-fractions-with-unlike-denominators-word-problem", "video_id": "PKh5B9xyzSc", "youtube_id": "PKh5B9xyzSc", "readable_id": "adding-fractions-with-unlike-denominators-word-problem"}, "_5ei_I02huY": {"duration": 441, "path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-complex-numbers-part-1/", "keywords": "2010, IIT, JEE, Paper, Problem, 39, Complex, Numbers, (part, 1)", "id": "_5ei_I02huY", "title": "IIT JEE complex numbers (part 1)", "description": "2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 1)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_5ei_I02huY.mp4/_5ei_I02huY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_5ei_I02huY.mp4/_5ei_I02huY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_5ei_I02huY.m3u8/_5ei_I02huY.m3u8"}, "slug": "iit-jee-complex-numbers-part-1", "video_id": "_5ei_I02huY", "youtube_id": "_5ei_I02huY", "readable_id": "iit-jee-complex-numbers-part-1"}, "D_jevR2FvzE": {"duration": 346, "path": "khan/partner-content/big-history-project/early-humans/ways-of-knowing-early-humans/bhp-intro-anthropology/", "keywords": "", "id": "D_jevR2FvzE", "title": "Intro to Anthropology", "description": "Kathy Schick defines the role of the anthropologist in understanding our past and present.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/D_jevR2FvzE.mp4/D_jevR2FvzE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/D_jevR2FvzE.mp4/D_jevR2FvzE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/D_jevR2FvzE.m3u8/D_jevR2FvzE.m3u8"}, "slug": "bhp-intro-anthropology", "video_id": "D_jevR2FvzE", "youtube_id": "D_jevR2FvzE", "readable_id": "bhp-intro-anthropology"}, "9KR1bad76qg": {"duration": 207, "path": "khan/test-prep/mcat/society-and-culture/social-structures/institutions/", "keywords": "social institutions", "id": "9KR1bad76qg", "title": "Social institutions", "description": "Institutions are structures of society that fulfill the needs of the society. Not only are they essential to the society's needs, they also help to build the society itself. By Sydney Brown.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9KR1bad76qg.mp4/9KR1bad76qg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9KR1bad76qg.mp4/9KR1bad76qg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9KR1bad76qg.m3u8/9KR1bad76qg.m3u8"}, "slug": "institutions", "video_id": "9KR1bad76qg", "youtube_id": "9KR1bad76qg", "readable_id": "institutions"}, "BIZNBfBuu1w": {"duration": 417, "path": "khan/science/organic-chemistry/gen-chem-review/dot-strcutures-jay/dot-structures-i-single-bonds-1/", "keywords": "", "id": "BIZNBfBuu1w", "title": "Dot structures I: Single bonds", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/BIZNBfBuu1w.mp4/BIZNBfBuu1w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/BIZNBfBuu1w.mp4/BIZNBfBuu1w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/BIZNBfBuu1w.m3u8/BIZNBfBuu1w.m3u8"}, "slug": "dot-structures-i-single-bonds-1", "video_id": "BIZNBfBuu1w", "youtube_id": "BIZNBfBuu1w", "readable_id": "dot-structures-i-single-bonds-1"}, "mDttV5UmJ1Q": {"duration": 131, "path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-10/", "keywords": "", "id": "mDttV5UmJ1Q", "title": "Add Spout's tail", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mDttV5UmJ1Q.mp4/mDttV5UmJ1Q.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mDttV5UmJ1Q.mp4/mDttV5UmJ1Q.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mDttV5UmJ1Q.m3u8/mDttV5UmJ1Q.m3u8"}, "slug": "solderless-spout-10", "video_id": "mDttV5UmJ1Q", "youtube_id": "mDttV5UmJ1Q", "readable_id": "solderless-spout-10"}, "AM63tLZZzNo": {"duration": 249, "path": "khan/partner-content/big-history-project/acceleration/other-materials9/bhp-chemistry-energy/", "keywords": "", "id": "AM63tLZZzNo", "title": "Chemistry and Energy", "description": "Sustainable energy is one of the greatest challenges for chemists today.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AM63tLZZzNo.mp4/AM63tLZZzNo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AM63tLZZzNo.mp4/AM63tLZZzNo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AM63tLZZzNo.m3u8/AM63tLZZzNo.m3u8"}, "slug": "bhp-chemistry-energy", "video_id": "AM63tLZZzNo", "youtube_id": "AM63tLZZzNo", "readable_id": "bhp-chemistry-energy"}, "v4Fq9LEspzw": {"duration": 847, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/ebitda/", "keywords": "earnings, before, interest, taxes, depreciation, amortization, EBITDA", "id": "v4Fq9LEspzw", "title": "EBITDA", "description": "Review of Enterprise Value and comparing it to EBITDA", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v4Fq9LEspzw.mp4/v4Fq9LEspzw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v4Fq9LEspzw.mp4/v4Fq9LEspzw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v4Fq9LEspzw.m3u8/v4Fq9LEspzw.m3u8"}, "slug": "ebitda", "video_id": "v4Fq9LEspzw", "youtube_id": "v4Fq9LEspzw", "readable_id": "ebitda"}, "guxLpVICBjg": {"duration": 310, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/mary-cassatt-woman-with-a-pearl-necklace-in-a-loge-1879/", "keywords": "Mary Cassatt, Cassatt, Lydia, Pearl Necklace, Loge, 1879, Philadelphia, Impressionism, Paris, Second Empire, Palais Garnier, Opera House, Google Art Project, Smarthistory, Khan Academy, art history, OER", "id": "guxLpVICBjg", "title": "Cassatt, Woman with a Pearl Necklace in a Loge", "description": "Mary Cassatt, Woman with a Pearl Necklace in a Loge, 1879, oil on canvas, 32 x 23-1/2 inches or 81.3 x 59.7 cm (Philadelphia Museum of Art)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/guxLpVICBjg.mp4/guxLpVICBjg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/guxLpVICBjg.mp4/guxLpVICBjg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/guxLpVICBjg.m3u8/guxLpVICBjg.m3u8"}, "slug": "mary-cassatt-woman-with-a-pearl-necklace-in-a-loge-1879", "video_id": "guxLpVICBjg", "youtube_id": "guxLpVICBjg", "readable_id": "mary-cassatt-woman-with-a-pearl-necklace-in-a-loge-1879"}, "vaOXkt7uuac": {"duration": 644, "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-pythagorean-theorem-area/", "keywords": "geometry, pythagorean, theorem, area", "id": "vaOXkt7uuac", "title": "CA Geometry: Pythagorean theorem, area", "description": "36-40, Pythagorean Theorem and Area", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vaOXkt7uuac.mp4/vaOXkt7uuac.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vaOXkt7uuac.mp4/vaOXkt7uuac.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vaOXkt7uuac.m3u8/vaOXkt7uuac.m3u8"}, "slug": "ca-geometry-pythagorean-theorem-area", "video_id": "vaOXkt7uuac", "youtube_id": "vaOXkt7uuac", "readable_id": "ca-geometry-pythagorean-theorem-area"}, "q7STpNRwzzc": {"duration": 58, "path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-tint-shade-tone/", "keywords": "", "id": "q7STpNRwzzc", "title": "Art Terms in Action: Tint, Shade, and Tone", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/q7STpNRwzzc.mp4/q7STpNRwzzc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/q7STpNRwzzc.mp4/q7STpNRwzzc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/q7STpNRwzzc.m3u8/q7STpNRwzzc.m3u8"}, "slug": "moma-art-term-tint-shade-tone", "video_id": "q7STpNRwzzc", "youtube_id": "q7STpNRwzzc", "readable_id": "moma-art-term-tint-shade-tone"}, "5qWI2pEv0wg": {"duration": 384, "path": "khan/humanities/history/euro-hist/hitler-nazis/hitler-s-beer-hall-putsch/", "keywords": "", "id": "5qWI2pEv0wg", "title": "Hitler's Beer Hall Putsch", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5qWI2pEv0wg.mp4/5qWI2pEv0wg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5qWI2pEv0wg.mp4/5qWI2pEv0wg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5qWI2pEv0wg.m3u8/5qWI2pEv0wg.m3u8"}, "slug": "hitler-s-beer-hall-putsch", "video_id": "5qWI2pEv0wg", "youtube_id": "5qWI2pEv0wg", "readable_id": "hitler-s-beer-hall-putsch"}, "r4rWWtSWf_k": {"duration": 321, "path": "khan/test-prep/ap-art-history/south-east-se-asia/japan-art/ancient-temples-nara/", "keywords": "", "id": "r4rWWtSWf_k", "title": "Ancient temples of Nara Japan", "description": "Explore Nara's ancient Buddhist art and architecture. Learn more about Buddhism in Japan on the Asian Art Museum's education website.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/r4rWWtSWf_k.mp4/r4rWWtSWf_k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/r4rWWtSWf_k.mp4/r4rWWtSWf_k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/r4rWWtSWf_k.m3u8/r4rWWtSWf_k.m3u8"}, "slug": "ancient-temples-nara", "video_id": "r4rWWtSWf_k", "youtube_id": "r4rWWtSWf_k", "readable_id": "ancient-temples-nara"}, "GGQngIp0YGI": {"duration": 536, "path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/limit-examples-part-1/", "keywords": "calculus, limits, limit, examples, khan, academy, CC_39336_A-CED_2, CC_39336_A-CED_3, CC_39336_A-REI_10, CC_39336_F-BF_1, CC_39336_F-IF_7_d", "id": "GGQngIp0YGI", "title": "Limit examples (part 1)", "description": "Some limit exercises", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GGQngIp0YGI.mp4/GGQngIp0YGI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GGQngIp0YGI.mp4/GGQngIp0YGI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GGQngIp0YGI.m3u8/GGQngIp0YGI.m3u8"}, "slug": "limit-examples-part-1", "video_id": "GGQngIp0YGI", "youtube_id": "GGQngIp0YGI", "readable_id": "limit-examples-part-1"}, "OCD4Dr3kmmA": {"duration": 465, "path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/o2-and-co2-solubility/", "keywords": "", "id": "OCD4Dr3kmmA", "title": "O2 and CO2 solubility", "description": "Get an intuition for why carbon dioxide is so much more soluble than oxygen when it goes into water. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/OCD4Dr3kmmA.mp4/OCD4Dr3kmmA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/OCD4Dr3kmmA.mp4/OCD4Dr3kmmA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/OCD4Dr3kmmA.m3u8/OCD4Dr3kmmA.m3u8"}, "slug": "o2-and-co2-solubility", "video_id": "OCD4Dr3kmmA", "youtube_id": "OCD4Dr3kmmA", "readable_id": "o2-and-co2-solubility"}, "1213qW5k55I": {"duration": 277, "path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/discriminant-for-types-of-solutions-for-a-quadratic/", "keywords": "u16_l5_t2_we4, Discriminant, for, Types, of, Solutions, Quadratic", "id": "1213qW5k55I", "title": "Discriminant for types of solutions for a quadratic", "description": "Discriminant for Types of Solutions for a Quadratic", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1213qW5k55I.mp4/1213qW5k55I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1213qW5k55I.mp4/1213qW5k55I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1213qW5k55I.m3u8/1213qW5k55I.m3u8"}, "slug": "discriminant-for-types-of-solutions-for-a-quadratic", "video_id": "1213qW5k55I", "youtube_id": "1213qW5k55I", "readable_id": "discriminant-for-types-of-solutions-for-a-quadratic"}, "YEZMReBbkP0": {"duration": 241, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/company-statements-capital-struc/basic-capital-structure-differences/", "keywords": "debt, equity, capital, structure", "id": "YEZMReBbkP0", "title": "Basic capital structure differences", "description": "Understanding basic capital structure differences", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/YEZMReBbkP0.mp4/YEZMReBbkP0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/YEZMReBbkP0.mp4/YEZMReBbkP0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/YEZMReBbkP0.m3u8/YEZMReBbkP0.m3u8"}, "slug": "basic-capital-structure-differences", "video_id": "YEZMReBbkP0", "youtube_id": "YEZMReBbkP0", "readable_id": "basic-capital-structure-differences"}, "qEdevRBLKVE": {"duration": 64, "path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/ss-extracurriculars-that-are-a-passion/", "keywords": "", "id": "qEdevRBLKVE", "title": "Student story: Extracurriculars that are a passion", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qEdevRBLKVE.mp4/qEdevRBLKVE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qEdevRBLKVE.mp4/qEdevRBLKVE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qEdevRBLKVE.m3u8/qEdevRBLKVE.m3u8"}, "slug": "ss-extracurriculars-that-are-a-passion", "video_id": "qEdevRBLKVE", "youtube_id": "qEdevRBLKVE", "readable_id": "ss-extracurriculars-that-are-a-passion"}, "5M0vOHFm3Ww": {"duration": 230, "path": "khan/humanities/art-americas/south-america-early/ancient-colombia/depletion-gilding/", "keywords": "", "id": "5M0vOHFm3Ww", "title": "Depletion gilding: Goldmaking techniques of the ancient Colombians", "description": "Depletion gilding (dorado por oxidaci\u00f3n). The gold-making techniques of the ancient Colombians. \u00a9 Trustees of the British Museum", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/5M0vOHFm3Ww.mp4/5M0vOHFm3Ww.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/5M0vOHFm3Ww.mp4/5M0vOHFm3Ww.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/5M0vOHFm3Ww.m3u8/5M0vOHFm3Ww.m3u8"}, "slug": "depletion-gilding", "video_id": "5M0vOHFm3Ww", "youtube_id": "5M0vOHFm3Ww", "readable_id": "depletion-gilding"}, "i9z6x1LbdW8": {"duration": 274, "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/buerger-disease/", "keywords": "", "id": "i9z6x1LbdW8", "title": "Buerger disease", "description": "Buerger disease (also known as the thromboangiitis obliterans) is a type of vasculitis that affects small and medium blood vessels and has been linked strongly to smoking. Buerger disease is characterised by poor blood flow through blood vessels due to inflammation and blood clotting. Symptoms typically include pain (claudication), increased sensitivity to cold, diminished pulses, and cyanosis. Gangrene is often a complication which may require amputation of the affected area. Learn how health care professionals diagnose Buerger disease using ultrasound and angiography.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/i9z6x1LbdW8.mp4/i9z6x1LbdW8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/i9z6x1LbdW8.mp4/i9z6x1LbdW8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/i9z6x1LbdW8.m3u8/i9z6x1LbdW8.m3u8"}, "slug": "buerger-disease", "video_id": "i9z6x1LbdW8", "youtube_id": "i9z6x1LbdW8", "readable_id": "buerger-disease"}, "ZzwuHS9ldbY": {"duration": 605, "path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/intro-to-springs-and-hooke-s-law/", "keywords": "physics, springs, hooke's, law, force", "id": "ZzwuHS9ldbY", "title": "Intro to springs and Hooke's law", "description": "Introduction to Hooke's Law", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZzwuHS9ldbY.mp4/ZzwuHS9ldbY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZzwuHS9ldbY.mp4/ZzwuHS9ldbY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZzwuHS9ldbY.m3u8/ZzwuHS9ldbY.m3u8"}, "slug": "intro-to-springs-and-hooke-s-law", "video_id": "ZzwuHS9ldbY", "youtube_id": "ZzwuHS9ldbY", "readable_id": "intro-to-springs-and-hooke-s-law"}, "62zKxexJrIM": {"duration": 61, "path": "khan/partner-content/nasa/searchingforlife/exploring_mars_ancient/mars-in-a-minute-is-mars-red-hot/", "keywords": "", "id": "62zKxexJrIM", "title": "Temperature & atmosphere", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/62zKxexJrIM.mp4/62zKxexJrIM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/62zKxexJrIM.mp4/62zKxexJrIM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/62zKxexJrIM.m3u8/62zKxexJrIM.m3u8"}, "slug": "mars-in-a-minute-is-mars-red-hot", "video_id": "62zKxexJrIM", "youtube_id": "62zKxexJrIM", "readable_id": "mars-in-a-minute-is-mars-red-hot"}, "qDsLxwmW_Ms": {"duration": 702, "path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-13/", "keywords": "GMAT, data, sufficiency, math", "id": "qDsLxwmW_Ms", "title": "GMAT: Data sufficiency 13", "description": "59-62, pg. 282", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/qDsLxwmW_Ms.mp4/qDsLxwmW_Ms.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/qDsLxwmW_Ms.mp4/qDsLxwmW_Ms.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/qDsLxwmW_Ms.m3u8/qDsLxwmW_Ms.m3u8"}, "slug": "gmat-data-sufficiency-13", "video_id": "qDsLxwmW_Ms", "youtube_id": "qDsLxwmW_Ms", "readable_id": "gmat-data-sufficiency-13"}, "CSXP02Cl3zM": {"duration": 393, "path": "khan/science/discoveries-projects/robots/bit-zee/attach-and-wire-bit-zee-s-motor-controller/", "keywords": "Attach motor controller, L-298, Bit-zee, make, hack, diy", "id": "CSXP02Cl3zM", "title": "Motor controller connections", "description": "In this video we show you how to attach and wire the L-298 motor controller board to Bit-zee's frame.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/CSXP02Cl3zM.mp4/CSXP02Cl3zM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/CSXP02Cl3zM.mp4/CSXP02Cl3zM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/CSXP02Cl3zM.m3u8/CSXP02Cl3zM.m3u8"}, "slug": "attach-and-wire-bit-zee-s-motor-controller", "video_id": "CSXP02Cl3zM", "youtube_id": "CSXP02Cl3zM", "readable_id": "attach-and-wire-bit-zee-s-motor-controller"}, "54--44LhQRU": {"duration": 492, "path": "khan/test-prep/mcat/physical-processes/gas-phase/avogadros-law/", "keywords": "", "id": "54--44LhQRU", "title": "Avogadro's law", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/54--44LhQRU.mp4/54--44LhQRU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/54--44LhQRU.mp4/54--44LhQRU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/54--44LhQRU.m3u8/54--44LhQRU.m3u8"}, "slug": "avogadros-law", "video_id": "54--44LhQRU", "youtube_id": "54--44LhQRU", "readable_id": "avogadros-law"}, "TPov_v9mLWc": {"duration": 415, "path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/green-s-and-stokes-theorem-relationship/", "keywords": "vector, multivariable, calculus", "id": "TPov_v9mLWc", "title": "Green's and Stokes' theorem relationship", "description": "Seeing that Green's Theorem is just a special case of Stokes' Theorem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/TPov_v9mLWc.mp4/TPov_v9mLWc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/TPov_v9mLWc.mp4/TPov_v9mLWc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/TPov_v9mLWc.m3u8/TPov_v9mLWc.m3u8"}, "slug": "green-s-and-stokes-theorem-relationship", "video_id": "TPov_v9mLWc", "youtube_id": "TPov_v9mLWc", "readable_id": "green-s-and-stokes-theorem-relationship"}, "K7dP25_Sebo": {"duration": 331, "path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/stages-of-dementia-and-alzheimers-disease/", "keywords": "Alzheimer's Disease (Disease Or Medical Condition),Dementia (Disease Or Medical Condition),Health (Industry),Disease (Cause Of Death)", "id": "K7dP25_Sebo", "title": "Stages of dementia and Alzheimer's disease", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K7dP25_Sebo.mp4/K7dP25_Sebo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K7dP25_Sebo.mp4/K7dP25_Sebo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K7dP25_Sebo.m3u8/K7dP25_Sebo.m3u8"}, "slug": "stages-of-dementia-and-alzheimers-disease", "video_id": "K7dP25_Sebo", "youtube_id": "K7dP25_Sebo", "readable_id": "stages-of-dementia-and-alzheimers-disease"}, "NQazgcu8c7s": {"duration": 599, "path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-6b/", "keywords": "2011, Calculus, BC, Free, Response, #6b", "id": "NQazgcu8c7s", "title": "2011 Calculus BC free response #6b", "description": "Taylor Series for cos x at x=0", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NQazgcu8c7s.mp4/NQazgcu8c7s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NQazgcu8c7s.mp4/NQazgcu8c7s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NQazgcu8c7s.m3u8/NQazgcu8c7s.m3u8"}, "slug": "2011-calculus-bc-free-response-6b", "video_id": "NQazgcu8c7s", "youtube_id": "NQazgcu8c7s", "readable_id": "2011-calculus-bc-free-response-6b"}, "NuccqpiUHrk": {"duration": 136, "path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/rational-exponents-and-exponent-laws/", "keywords": "u16_l1_t3_we3, Rational, Exponents, and, Exponent, Laws", "id": "NuccqpiUHrk", "title": "How to simplify a variable cube root expression (example)", "description": "Sal shows how to simplify \u221b(125x^6y^3).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/NuccqpiUHrk.mp4/NuccqpiUHrk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/NuccqpiUHrk.mp4/NuccqpiUHrk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/NuccqpiUHrk.m3u8/NuccqpiUHrk.m3u8"}, "slug": "rational-exponents-and-exponent-laws", "video_id": "NuccqpiUHrk", "youtube_id": "NuccqpiUHrk", "readable_id": "rational-exponents-and-exponent-laws"}, "L3nH3KTNS3E": {"duration": 674, "path": "khan/test-prep/mcat/cells/cell-theory/history-and-development-of-cell-theory/", "keywords": "", "id": "L3nH3KTNS3E", "title": "History and development of cell theory", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/L3nH3KTNS3E.mp4/L3nH3KTNS3E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/L3nH3KTNS3E.mp4/L3nH3KTNS3E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/L3nH3KTNS3E.m3u8/L3nH3KTNS3E.m3u8"}, "slug": "history-and-development-of-cell-theory", "video_id": "L3nH3KTNS3E", "youtube_id": "L3nH3KTNS3E", "readable_id": "history-and-development-of-cell-theory"}, "KWf5kSNPbz0": {"duration": 110, "path": "khan/science/discoveries-projects/robots/all-about-spout/spout_battery/", "keywords": "", "id": "KWf5kSNPbz0", "title": "Spout battery configuration and polarization", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/KWf5kSNPbz0.mp4/KWf5kSNPbz0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/KWf5kSNPbz0.mp4/KWf5kSNPbz0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/KWf5kSNPbz0.m3u8/KWf5kSNPbz0.m3u8"}, "slug": "spout_battery", "video_id": "KWf5kSNPbz0", "youtube_id": "KWf5kSNPbz0", "readable_id": "spout_battery"}, "bs2pTBkJCxQ": {"duration": 478, "path": "khan/partner-content/wi-phi/metaphys-epistemology/paradoxes-of-perception/", "keywords": "Philosophy (Field Of Study),Metaphysics (Field Of Study),Perception (Quotation Subject),Paradox (Quotation Subject),Eugen Fischer,University Of East Anglia (College/University),Western Philosophy (Field Of Study),argument from illusion,Khan Academy (Nonprofit Organization),Wireless Philosophy,Wiphi,Phenomenology (Field Of Study),Epistemology (Field Of Study),David Hume (Author)", "id": "bs2pTBkJCxQ", "title": "Epistemology: Paradoxes of Perception", "description": "In this video, Dr. Eugen Fischer (UEA) presents the \u2018argument from illusion\u2019. This argument appears to refute our common-sense conception of perception (seeing, hearing, etc.). Together with parallel arguments, it raises the problem of perception that has been a lynch-pin of Western philosophy, since the mid-18th century.\n\nSpeaker: Dr. Eugen Fischer, Associate Professor of Philosophy, University of East Anglia", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bs2pTBkJCxQ.mp4/bs2pTBkJCxQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bs2pTBkJCxQ.mp4/bs2pTBkJCxQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bs2pTBkJCxQ.m3u8/bs2pTBkJCxQ.m3u8"}, "slug": "paradoxes-of-perception", "video_id": "bs2pTBkJCxQ", "youtube_id": "bs2pTBkJCxQ", "readable_id": "paradoxes-of-perception"}, "Yz2OosyMTmY": {"duration": 397, "path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/linear-algebra-simplifying-conditions-for-invertibility/", "keywords": "identity, transformation, invertible", "id": "Yz2OosyMTmY", "title": "Simplifying conditions for invertibility", "description": "Showing that a transformation is invertible if and only if rref(A) is equal to the identity matrix", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Yz2OosyMTmY.mp4/Yz2OosyMTmY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Yz2OosyMTmY.mp4/Yz2OosyMTmY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Yz2OosyMTmY.m3u8/Yz2OosyMTmY.m3u8"}, "slug": "linear-algebra-simplifying-conditions-for-invertibility", "video_id": "Yz2OosyMTmY", "youtube_id": "Yz2OosyMTmY", "readable_id": "linear-algebra-simplifying-conditions-for-invertibility"}, "uc2xgyjxKHg": {"duration": 214, "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/curators-choice-browns-work/", "keywords": "Pre-raphaleite, Tate", "id": "uc2xgyjxKHg", "title": "Pre-Raphaelites: Curator's choice - Ford Madox Brown's 'Work'", "description": "One of the most radical paintings of the Pre-Raphaelite movement is Work by Ford Madox Brown, which attempts to capture the entire social fabric of Victorian London in a single scene. Curator Tim Barringer explores its multiple stories. Ford Madox Brown's Work is one of over 150 works currently on show at Tate Britain in the exhibition Pre-Raphaelites: Victorian Avant-Garde (2013).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uc2xgyjxKHg.mp4/uc2xgyjxKHg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uc2xgyjxKHg.mp4/uc2xgyjxKHg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uc2xgyjxKHg.m3u8/uc2xgyjxKHg.m3u8"}, "slug": "curators-choice-browns-work", "video_id": "uc2xgyjxKHg", "youtube_id": "uc2xgyjxKHg", "readable_id": "curators-choice-browns-work"}, "uVWquWFjnCw": {"duration": 455, "path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/first-and-second-ionization-energy/", "keywords": "", "id": "uVWquWFjnCw", "title": "First and second ionization energy", "description": "Comparing first and second ionization energy of Li using nuclear charge, shielding, and distance of electrons from nucleus", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uVWquWFjnCw.mp4/uVWquWFjnCw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uVWquWFjnCw.mp4/uVWquWFjnCw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uVWquWFjnCw.m3u8/uVWquWFjnCw.m3u8"}, "slug": "first-and-second-ionization-energy", "video_id": "uVWquWFjnCw", "youtube_id": "uVWquWFjnCw", "readable_id": "first-and-second-ionization-energy"}, "z4vB44Rdq48": {"duration": 108, "path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/roverupdate_dec2/", "keywords": "", "id": "z4vB44Rdq48", "title": "Calcium-rich deposits found", "description": "First candidate drill site found", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z4vB44Rdq48.mp4/z4vB44Rdq48.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z4vB44Rdq48.mp4/z4vB44Rdq48.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z4vB44Rdq48.m3u8/z4vB44Rdq48.m3u8"}, "slug": "roverupdate_dec2", "video_id": "z4vB44Rdq48", "youtube_id": "z4vB44Rdq48", "readable_id": "roverupdate_dec2"}, "itnwiwRpw4w": {"duration": 825, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-alcohols-tutorial/synthesis-of-alcohols-using-grignard-reagents-i/", "keywords": "", "id": "itnwiwRpw4w", "title": "Synthesis of alcohols using Grignard reagents I", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/itnwiwRpw4w.mp4/itnwiwRpw4w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/itnwiwRpw4w.mp4/itnwiwRpw4w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/itnwiwRpw4w.m3u8/itnwiwRpw4w.m3u8"}, "slug": "synthesis-of-alcohols-using-grignard-reagents-i", "video_id": "itnwiwRpw4w", "youtube_id": "itnwiwRpw4w", "readable_id": "synthesis-of-alcohols-using-grignard-reagents-i"}, "3g6P0lRXotI": {"duration": 209, "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/futures-introduction/", "keywords": "Futures, Introduction, marquee", "id": "3g6P0lRXotI", "title": "Futures introduction", "description": "Futures Introduction", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3g6P0lRXotI.mp4/3g6P0lRXotI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3g6P0lRXotI.mp4/3g6P0lRXotI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3g6P0lRXotI.m3u8/3g6P0lRXotI.m3u8"}, "slug": "futures-introduction", "video_id": "3g6P0lRXotI", "youtube_id": "3g6P0lRXotI", "readable_id": "futures-introduction"}, "ZN48Ub3k8uE": {"duration": 326, "path": "khan/math/recreational-math/puzzles/brain-teasers/finding-heavier-ball/", "keywords": "", "id": "ZN48Ub3k8uE", "title": "Heavier ball", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZN48Ub3k8uE.mp4/ZN48Ub3k8uE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZN48Ub3k8uE.mp4/ZN48Ub3k8uE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZN48Ub3k8uE.m3u8/ZN48Ub3k8uE.m3u8"}, "slug": "finding-heavier-ball", "video_id": "ZN48Ub3k8uE", "youtube_id": "ZN48Ub3k8uE", "readable_id": "finding-heavier-ball"}, "PX7EZPcamk8": {"duration": 234, "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-10/", "keywords": "", "id": "PX7EZPcamk8", "title": "10 Maximum triangle area given side lengths", "description": "This video features an official SAT practice question provided by the College Board.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PX7EZPcamk8.mp4/PX7EZPcamk8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PX7EZPcamk8.mp4/PX7EZPcamk8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PX7EZPcamk8.m3u8/PX7EZPcamk8.m3u8"}, "slug": "sat-getting-ready-2-10", "video_id": "PX7EZPcamk8", "youtube_id": "PX7EZPcamk8", "readable_id": "sat-getting-ready-2-10"}, "PXKHyT__B2k": {"duration": 188, "path": "khan/math/pre-algebra/applying-math-reasoning-topic/reading_data/reading-stem-and-leaf-plots/", "keywords": "", "id": "PXKHyT__B2k", "title": "Reading stem and leaf plots", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PXKHyT__B2k.mp4/PXKHyT__B2k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PXKHyT__B2k.mp4/PXKHyT__B2k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PXKHyT__B2k.m3u8/PXKHyT__B2k.m3u8"}, "slug": "reading-stem-and-leaf-plots", "video_id": "PXKHyT__B2k", "youtube_id": "PXKHyT__B2k", "readable_id": "reading-stem-and-leaf-plots"}, "rxMF2RYzlto": {"duration": 598, "path": "khan/partner-content/big-history-project/life/how-did-life-begin-change/bhp-earth-life-interact/", "keywords": "", "id": "rxMF2RYzlto", "title": "How Do Earth and Life Interact?", "description": "A look at the \"comfort zone\" humans live in, and the interplay of life and the biosphere.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rxMF2RYzlto.mp4/rxMF2RYzlto.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rxMF2RYzlto.mp4/rxMF2RYzlto.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rxMF2RYzlto.m3u8/rxMF2RYzlto.m3u8"}, "slug": "bhp-earth-life-interact", "video_id": "rxMF2RYzlto", "youtube_id": "rxMF2RYzlto", "readable_id": "bhp-earth-life-interact"}, "cYUVtdpTlEo": {"duration": 256, "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/caillebotte-man-at-his-bath-1884/", "keywords": "smarthistory, art history, caillebotte, impressionism, National Gallery", "id": "cYUVtdpTlEo", "title": "Caillebotte, Man at his Bath", "description": "Gustave Caillebotte, Man at his Bath, 1884, oil on canvas, 57 x 45 in. (144.8 x 114.3 cm), (Private Collection, on loan to the National Gallery, London) Speakers: Dr. Parme Giuntini, Director of Art History, Otis College of Art and Design Dr. Robert Summers, Lecturer, Otis College of Art and Design", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/cYUVtdpTlEo.mp4/cYUVtdpTlEo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/cYUVtdpTlEo.mp4/cYUVtdpTlEo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/cYUVtdpTlEo.m3u8/cYUVtdpTlEo.m3u8"}, "slug": "caillebotte-man-at-his-bath-1884", "video_id": "cYUVtdpTlEo", "youtube_id": "cYUVtdpTlEo", "readable_id": "caillebotte-man-at-his-bath-1884"}, "-6KzZKuQ1lk": {"duration": 347, "path": "khan/test-prep/mcat/behavior/learning-slug/classical-conditioning-neutral-conditioned-and-unconditioned-stimuli-and-responses/", "keywords": "", "id": "-6KzZKuQ1lk", "title": "Classical conditioning: Neutral, conditioned, and unconditioned stimuli and responses", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-6KzZKuQ1lk.mp4/-6KzZKuQ1lk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-6KzZKuQ1lk.mp4/-6KzZKuQ1lk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-6KzZKuQ1lk.m3u8/-6KzZKuQ1lk.m3u8"}, "slug": "classical-conditioning-neutral-conditioned-and-unconditioned-stimuli-and-responses", "video_id": "-6KzZKuQ1lk", "youtube_id": "-6KzZKuQ1lk", "readable_id": "classical-conditioning-neutral-conditioned-and-unconditioned-stimuli-and-responses"}, "7WXijfIZh64": {"duration": 248, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/more-equation-practice/basic-rate-problem/", "keywords": "U03_L2_T3_we2, Basic, Rate, Problem, CC_7_EE_3, CC_7_RP_1, CC_39336_F-IF_6", "id": "7WXijfIZh64", "title": "Basic rate problem", "description": "Basic Rate Problem", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/7WXijfIZh64.mp4/7WXijfIZh64.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/7WXijfIZh64.mp4/7WXijfIZh64.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/7WXijfIZh64.m3u8/7WXijfIZh64.m3u8"}, "slug": "basic-rate-problem", "video_id": "7WXijfIZh64", "youtube_id": "7WXijfIZh64", "readable_id": "basic-rate-problem"}, "0eu-3FIRRz8": {"duration": 625, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/nerve-regulation-of-the-heart/increasing-ventricular-contractility-inotropic-effect/", "keywords": "", "id": "0eu-3FIRRz8", "title": "Increasing ventricular contractility - inotropic effect", "description": "Find out how the sympathetic nerves increase the heart's force of contraction and speed of relaxation! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0eu-3FIRRz8.mp4/0eu-3FIRRz8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0eu-3FIRRz8.mp4/0eu-3FIRRz8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0eu-3FIRRz8.m3u8/0eu-3FIRRz8.m3u8"}, "slug": "increasing-ventricular-contractility-inotropic-effect", "video_id": "0eu-3FIRRz8", "youtube_id": "0eu-3FIRRz8", "readable_id": "increasing-ventricular-contractility-inotropic-effect"}, "PQ48N5jaG2w": {"duration": 546, "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/lead-storage-battery/", "keywords": "", "id": "PQ48N5jaG2w", "title": "Lead storage battery", "description": "Balancing the redox reaction (in acid) that occurs in a lead storage battery.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PQ48N5jaG2w.mp4/PQ48N5jaG2w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PQ48N5jaG2w.mp4/PQ48N5jaG2w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PQ48N5jaG2w.m3u8/PQ48N5jaG2w.m3u8"}, "slug": "lead-storage-battery", "video_id": "PQ48N5jaG2w", "youtube_id": "PQ48N5jaG2w", "readable_id": "lead-storage-battery"}, "eQEUHxzLmDE": {"duration": 512, "path": "khan/partner-content/big-history-project/life/other-materials5/bhp-carbon-cycle/", "keywords": "", "id": "eQEUHxzLmDE", "title": "The Carbon Cycle", "description": "Carbon's ability to form chemical bonds is very important to the history of life on Earth and continues to influence our own future.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/eQEUHxzLmDE.mp4/eQEUHxzLmDE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/eQEUHxzLmDE.mp4/eQEUHxzLmDE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/eQEUHxzLmDE.m3u8/eQEUHxzLmDE.m3u8"}, "slug": "bhp-carbon-cycle", "video_id": "eQEUHxzLmDE", "youtube_id": "eQEUHxzLmDE", "readable_id": "bhp-carbon-cycle"}, "ZRMSHG18aMY": {"duration": 631, "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/sn1-vs-sn2-solvent-effects/", "keywords": "", "id": "ZRMSHG18aMY", "title": "Sn1 vs Sn2: Solvent effects", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZRMSHG18aMY.mp4/ZRMSHG18aMY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZRMSHG18aMY.mp4/ZRMSHG18aMY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZRMSHG18aMY.m3u8/ZRMSHG18aMY.m3u8"}, "slug": "sn1-vs-sn2-solvent-effects", "video_id": "ZRMSHG18aMY", "youtube_id": "ZRMSHG18aMY", "readable_id": "sn1-vs-sn2-solvent-effects"}, "gRKZaojKeP0": {"duration": 473, "path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/angles-formed-between-transversals-and-parallel-lines/", "keywords": "Angles, of, parallel, lines, transversal, CC_8_G_5", "id": "gRKZaojKeP0", "title": "Angles formed between transversals and parallel lines", "description": "Angles of parallel lines", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/gRKZaojKeP0.mp4/gRKZaojKeP0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/gRKZaojKeP0.mp4/gRKZaojKeP0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/gRKZaojKeP0.m3u8/gRKZaojKeP0.m3u8"}, "slug": "angles-formed-between-transversals-and-parallel-lines", "video_id": "gRKZaojKeP0", "youtube_id": "gRKZaojKeP0", "readable_id": "angles-formed-between-transversals-and-parallel-lines"}, "AjvLQJ6PIiU": {"duration": 470, "path": "khan/partner-content/cas-biodiversity/biodiversity-levels/biodiversity-tree-of-life/discovering-the-tree-of-life/", "keywords": "", "id": "AjvLQJ6PIiU", "title": "Discovering the tree of life", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/AjvLQJ6PIiU.mp4/AjvLQJ6PIiU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/AjvLQJ6PIiU.mp4/AjvLQJ6PIiU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/AjvLQJ6PIiU.m3u8/AjvLQJ6PIiU.m3u8"}, "slug": "discovering-the-tree-of-life", "video_id": "AjvLQJ6PIiU", "youtube_id": "AjvLQJ6PIiU", "readable_id": "discovering-the-tree-of-life"}, "fnuIT7EhAvs": {"duration": 84, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/solving_for_variable/solving-for-a-variable/", "keywords": "u15_l3_t1_we1, Solving, for, Variable, CC_6_EE_2_c", "id": "fnuIT7EhAvs", "title": "Solving for a variable", "description": "Solving for a Variable", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fnuIT7EhAvs.mp4/fnuIT7EhAvs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fnuIT7EhAvs.mp4/fnuIT7EhAvs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fnuIT7EhAvs.m3u8/fnuIT7EhAvs.m3u8"}, "slug": "solving-for-a-variable", "video_id": "fnuIT7EhAvs", "youtube_id": "fnuIT7EhAvs", "readable_id": "solving-for-a-variable"}, "vcn2ruTOwFo": {"duration": 593, "path": "khan/math/pre-algebra/factors-multiples/divisibility_and_factors/finding-factors-of-a-number/", "keywords": "U02_L1_T3_we2, Finding, Factors, of, Number, CC_3_OA_6, CC_4_OA_4, CC_6_NS_4, CC_39336_A-REI_4_b, CC_39336_A-SSE_3_a", "id": "vcn2ruTOwFo", "title": "Finding factors of a number", "description": "To find the factors of a number means to find all the whole numbers that the number in question is divisible by. Can you help us find the factors in this example?", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/vcn2ruTOwFo.mp4/vcn2ruTOwFo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/vcn2ruTOwFo.mp4/vcn2ruTOwFo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/vcn2ruTOwFo.m3u8/vcn2ruTOwFo.m3u8"}, "slug": "finding-factors-of-a-number", "video_id": "vcn2ruTOwFo", "youtube_id": "vcn2ruTOwFo", "readable_id": "finding-factors-of-a-number"}, "WAPZihVUmzE": {"duration": 470, "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/washer-or-ring-method-for-vertical-line-rotation/", "keywords": "", "id": "WAPZihVUmzE", "title": "Washer or ring method for vertical line rotation", "description": "Setting up the definite integral for the volume of a solid of revolution around a vertical line using the \"washer\" or \"ring\" method.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/WAPZihVUmzE.mp4/WAPZihVUmzE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/WAPZihVUmzE.mp4/WAPZihVUmzE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/WAPZihVUmzE.m3u8/WAPZihVUmzE.m3u8"}, "slug": "washer-or-ring-method-for-vertical-line-rotation", "video_id": "WAPZihVUmzE", "youtube_id": "WAPZihVUmzE", "readable_id": "washer-or-ring-method-for-vertical-line-rotation"}, "toKu2-qzJeM": {"duration": 185, "path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/sphereflakes/", "keywords": "", "id": "toKu2-qzJeM", "title": "Sphereflakes", "description": "Folding and cutting spheres.\n\nAwesome symmetry balls include card constructions by George Hart, which you can learn about here (and others are on georgehart.com): http://youtu.be/YBUEYrzMijA\nand the Gardner Ball by Oskar van Deventer with design by Scott Kim made in honor of Martin Gardner, which you can learn about here: http://youtu.be/rVHXlltXIlI\nand the Wolfram rhombic hexacontahedron thingy, and others!", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/toKu2-qzJeM.mp4/toKu2-qzJeM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/toKu2-qzJeM.mp4/toKu2-qzJeM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/toKu2-qzJeM.m3u8/toKu2-qzJeM.m3u8"}, "slug": "sphereflakes", "video_id": "toKu2-qzJeM", "youtube_id": "toKu2-qzJeM", "readable_id": "sphereflakes"}, "ujYRgDi3Lz8": {"duration": 237, "path": "khan/humanities/art-1010/architecture-20c/gordon-bunshaft-for-skidmore-owings-and-merrill-lever-house-1951-52/", "keywords": "Gordon Bunshaft, Bunshaft, Skidmore Owings and Merrill, SOM, Lever House, Lever Brothers, 1951, 1952, 390 Park Avenue, Architecture, Modern, International Style, Postwar, Glass and Steel, Matthew Postal", "id": "ujYRgDi3Lz8", "title": "Gordon Bunshaft, Lever House", "description": "Gordon Bunshaft for Skidmore Owings and Merrill, Lever House, 1951-52 (390 Park Avenue, NYC) Speakers: Dr. Matthew A. Postal and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ujYRgDi3Lz8.mp4/ujYRgDi3Lz8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ujYRgDi3Lz8.mp4/ujYRgDi3Lz8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ujYRgDi3Lz8.m3u8/ujYRgDi3Lz8.m3u8"}, "slug": "gordon-bunshaft-for-skidmore-owings-and-merrill-lever-house-1951-52", "video_id": "ujYRgDi3Lz8", "youtube_id": "ujYRgDi3Lz8", "readable_id": "gordon-bunshaft-for-skidmore-owings-and-merrill-lever-house-1951-52"}, "a29qZSRDBdE": {"duration": 328, "path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-5/", "keywords": "", "id": "a29qZSRDBdE", "title": "Stokes' theorem proof part 5", "description": "Working on the integrals...", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/a29qZSRDBdE.mp4/a29qZSRDBdE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/a29qZSRDBdE.mp4/a29qZSRDBdE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/a29qZSRDBdE.m3u8/a29qZSRDBdE.m3u8"}, "slug": "stokes-theorem-proof-part-5", "video_id": "a29qZSRDBdE", "youtube_id": "a29qZSRDBdE", "readable_id": "stokes-theorem-proof-part-5"}, "3o82OwR78wU": {"duration": 210, "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/actual-option-quotes/", "keywords": "options, open, interest, expiration", "id": "3o82OwR78wU", "title": "Actual option quotes", "description": "Actual Option Quotes", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3o82OwR78wU.mp4/3o82OwR78wU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3o82OwR78wU.mp4/3o82OwR78wU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3o82OwR78wU.m3u8/3o82OwR78wU.m3u8"}, "slug": "actual-option-quotes", "video_id": "3o82OwR78wU", "youtube_id": "3o82OwR78wU", "readable_id": "actual-option-quotes"}, "J1HAY8E3gms": {"duration": 288, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials/multiplying-polynomials-2/", "keywords": "U08_L2_T3_we2, Multiplying, Polynomials, CC_7_EE_4_a, CC_39336_A-APR_1", "id": "J1HAY8E3gms", "title": "Example 3: Modeling with polynomials", "description": "Write a polynomial expression that represents the total area of a window made of wood and glass.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/J1HAY8E3gms.mp4/J1HAY8E3gms.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/J1HAY8E3gms.mp4/J1HAY8E3gms.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/J1HAY8E3gms.m3u8/J1HAY8E3gms.m3u8"}, "slug": "multiplying-polynomials-2", "video_id": "J1HAY8E3gms", "youtube_id": "J1HAY8E3gms", "readable_id": "multiplying-polynomials-2"}, "9A8wM1UMLyo": {"duration": 536, "path": "khan/math/precalculus/vectors-precalc/magnitude-direction/vector-component-in-direction/", "keywords": "", "id": "9A8wM1UMLyo", "title": "Force contribution while pushing box", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9A8wM1UMLyo.mp4/9A8wM1UMLyo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9A8wM1UMLyo.mp4/9A8wM1UMLyo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9A8wM1UMLyo.m3u8/9A8wM1UMLyo.m3u8"}, "slug": "vector-component-in-direction", "video_id": "9A8wM1UMLyo", "youtube_id": "9A8wM1UMLyo", "readable_id": "vector-component-in-direction"}, "FBoYigdnLKQ": {"duration": 429, "path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/what-is-hypertension/", "keywords": "", "id": "FBoYigdnLKQ", "title": "What is hypertension?", "description": "Learn the categories of hypertension for systolic and diastolic blood pressures. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/FBoYigdnLKQ.mp4/FBoYigdnLKQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/FBoYigdnLKQ.mp4/FBoYigdnLKQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/FBoYigdnLKQ.m3u8/FBoYigdnLKQ.m3u8"}, "slug": "what-is-hypertension", "video_id": "FBoYigdnLKQ", "youtube_id": "FBoYigdnLKQ", "readable_id": "what-is-hypertension"}, "yiH6GoscimY": {"duration": 245, "path": "khan/math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity/sine-and-cosine-of-complements-example/", "keywords": "", "id": "yiH6GoscimY", "title": "Sine and cosine of complements example", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yiH6GoscimY.mp4/yiH6GoscimY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yiH6GoscimY.mp4/yiH6GoscimY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yiH6GoscimY.m3u8/yiH6GoscimY.m3u8"}, "slug": "sine-and-cosine-of-complements-example", "video_id": "yiH6GoscimY", "youtube_id": "yiH6GoscimY", "readable_id": "sine-and-cosine-of-complements-example"}, "nkOtOMNS5bQ": {"duration": 780, "path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/pv-diagrams-part-2-isothermal-isometric-adiabatic-processes/", "keywords": "", "id": "nkOtOMNS5bQ", "title": "PV diagrams - part 2: Isothermal, isometric, adiabatic processes", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/nkOtOMNS5bQ.mp4/nkOtOMNS5bQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/nkOtOMNS5bQ.mp4/nkOtOMNS5bQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/nkOtOMNS5bQ.m3u8/nkOtOMNS5bQ.m3u8"}, "slug": "pv-diagrams-part-2-isothermal-isometric-adiabatic-processes", "video_id": "nkOtOMNS5bQ", "youtube_id": "nkOtOMNS5bQ", "readable_id": "pv-diagrams-part-2-isothermal-isometric-adiabatic-processes"}, "K9eZTm4TL2c": {"duration": 583, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-polio/what-is-polio/", "keywords": "", "id": "K9eZTm4TL2c", "title": "What is polio?", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/K9eZTm4TL2c.mp4/K9eZTm4TL2c.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/K9eZTm4TL2c.mp4/K9eZTm4TL2c.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/K9eZTm4TL2c.m3u8/K9eZTm4TL2c.m3u8"}, "slug": "what-is-polio", "video_id": "K9eZTm4TL2c", "youtube_id": "K9eZTm4TL2c", "readable_id": "what-is-polio"}, "Oga0K4reWoY": {"duration": 497, "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/fetal-structures-in-an-adult/", "keywords": "", "id": "Oga0K4reWoY", "title": "Fetal structures in an adult", "description": "Find out what happens to those nifty fetal structures once we get older. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Oga0K4reWoY.mp4/Oga0K4reWoY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Oga0K4reWoY.mp4/Oga0K4reWoY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Oga0K4reWoY.m3u8/Oga0K4reWoY.m3u8"}, "slug": "fetal-structures-in-an-adult", "video_id": "Oga0K4reWoY", "youtube_id": "Oga0K4reWoY", "readable_id": "fetal-structures-in-an-adult"}, "LlKvubIqHc8": {"duration": 393, "path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/sine-taylor-series-at-0-maclaurin/", "keywords": "sin, cos, taylor", "id": "LlKvubIqHc8", "title": "Sine Taylor series at 0 (Maclaurin)", "description": "Sine Taylor Series at 0 (Maclaurin)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/LlKvubIqHc8.mp4/LlKvubIqHc8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/LlKvubIqHc8.mp4/LlKvubIqHc8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/LlKvubIqHc8.m3u8/LlKvubIqHc8.m3u8"}, "slug": "sine-taylor-series-at-0-maclaurin", "video_id": "LlKvubIqHc8", "youtube_id": "LlKvubIqHc8", "readable_id": "sine-taylor-series-at-0-maclaurin"}, "yKrp0sO3PJg": {"duration": 2607, "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/scott-cook/", "keywords": "", "id": "yKrp0sO3PJg", "title": "Scott Cook - Founder and Chairman of the Executive Committee, Intuit", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/yKrp0sO3PJg.mp4/yKrp0sO3PJg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/yKrp0sO3PJg.mp4/yKrp0sO3PJg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/yKrp0sO3PJg.m3u8/yKrp0sO3PJg.m3u8"}, "slug": "scott-cook", "video_id": "yKrp0sO3PJg", "youtube_id": "yKrp0sO3PJg", "readable_id": "scott-cook"}, "ck0pF7xub-k": {"duration": 635, "path": "khan/college-admissions/paying-for-college/financial-aid-process/overview-of-fafsa-and-css-profile/", "keywords": "", "id": "ck0pF7xub-k", "title": "Overview of FAFSA and CSS PROFILE", "description": "FAFSA - Submit ASAP After Jan 1\u00a0| CSS PROFILE - Submit ASAP", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ck0pF7xub-k.mp4/ck0pF7xub-k.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ck0pF7xub-k.mp4/ck0pF7xub-k.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ck0pF7xub-k.m3u8/ck0pF7xub-k.m3u8"}, "slug": "overview-of-fafsa-and-css-profile", "video_id": "ck0pF7xub-k", "youtube_id": "ck0pF7xub-k", "readable_id": "overview-of-fafsa-and-css-profile"}, "6bpoes4E8Vs": {"duration": 670, "path": "khan/partner-content/big-history-project/solar-system-and-earth/what-young-earth-was-like/bhp-what-was-young-earth-like/", "keywords": "", "id": "6bpoes4E8Vs", "title": "What Was The Young Earth Like?", "description": "Travel back in time to the early days of Earth; explore its surface and atmosphere over the ages.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6bpoes4E8Vs.mp4/6bpoes4E8Vs.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6bpoes4E8Vs.mp4/6bpoes4E8Vs.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6bpoes4E8Vs.m3u8/6bpoes4E8Vs.m3u8"}, "slug": "bhp-what-was-young-earth-like", "video_id": "6bpoes4E8Vs", "youtube_id": "6bpoes4E8Vs", "readable_id": "bhp-what-was-young-earth-like"}, "_ElAuQyw4uA": {"duration": 306, "path": "khan/test-prep/mcat/processing-the-environment/sight/photoreceptors-rods-cones/", "keywords": "photoreceptors, rods, cones, vision", "id": "_ElAuQyw4uA", "title": "Photoreceptors (rods vs cones)", "description": "In this video, I explore the similarities and differences between rods and cones. By Ronald Sahyouni.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/_ElAuQyw4uA.mp4/_ElAuQyw4uA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/_ElAuQyw4uA.mp4/_ElAuQyw4uA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/_ElAuQyw4uA.m3u8/_ElAuQyw4uA.m3u8"}, "slug": "photoreceptors-rods-cones", "video_id": "_ElAuQyw4uA", "youtube_id": "_ElAuQyw4uA", "readable_id": "photoreceptors-rods-cones"}, "PvoigrzODdE": {"duration": 575, "path": "khan/test-prep/mcat/cells/cellular-division/somatic-germ-cells/", "keywords": "", "id": "PvoigrzODdE", "title": "Zygote differentiating into somatic and germ cells", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/PvoigrzODdE.mp4/PvoigrzODdE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/PvoigrzODdE.mp4/PvoigrzODdE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/PvoigrzODdE.m3u8/PvoigrzODdE.m3u8"}, "slug": "somatic-germ-cells", "video_id": "PvoigrzODdE", "youtube_id": "PvoigrzODdE", "readable_id": "somatic-germ-cells"}, "rRZR3nsiIeA": {"duration": 444, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/yayoi-kusama/", "keywords": "Tate", "id": "rRZR3nsiIeA", "title": "Yayoi Kusama", "description": "This video brought to you by\u00a0Tate.org.uk\n\nThe nine decades of Yayoi Kusama's life have taken her from rural Japan to the New York art scene to contemporary Tokyo, in a career in which she has continuously innovated and re-invented her style. Learn more about how the artist strove to establish herself both in and beyond Japan, and how she harnessed those struggles to forge a remarkable artistic legacy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/rRZR3nsiIeA.mp4/rRZR3nsiIeA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/rRZR3nsiIeA.mp4/rRZR3nsiIeA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/rRZR3nsiIeA.m3u8/rRZR3nsiIeA.m3u8"}, "slug": "yayoi-kusama", "video_id": "rRZR3nsiIeA", "youtube_id": "rRZR3nsiIeA", "readable_id": "yayoi-kusama"}, "0lOpqmTdtzk": {"duration": 286, "path": "khan/math/algebra-basics/core-algebra-exponent-expressions/algebra-foundations-computing-scientific-notation/calculating-red-blood-cells-in-the-body-using-scientific-notation/", "keywords": "", "id": "0lOpqmTdtzk", "title": "Red blood cells in human body (scientific notation word problem)", "description": "Vampires and math students want to know: How many red blood cells are in the a human body? We can find the answer using scientific notation.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0lOpqmTdtzk.mp4/0lOpqmTdtzk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0lOpqmTdtzk.mp4/0lOpqmTdtzk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0lOpqmTdtzk.m3u8/0lOpqmTdtzk.m3u8"}, "slug": "calculating-red-blood-cells-in-the-body-using-scientific-notation", "video_id": "0lOpqmTdtzk", "youtube_id": "0lOpqmTdtzk", "readable_id": "calculating-red-blood-cells-in-the-body-using-scientific-notation"}, "fa-VZ-SDxgY": {"duration": 715, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/price-and-market-capitalization/", "keywords": "finance, investing, stocks, valuation", "id": "fa-VZ-SDxgY", "title": "Price and market capitalization", "description": "Introduction to price and market capitalization", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fa-VZ-SDxgY.mp4/fa-VZ-SDxgY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fa-VZ-SDxgY.mp4/fa-VZ-SDxgY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fa-VZ-SDxgY.m3u8/fa-VZ-SDxgY.m3u8"}, "slug": "price-and-market-capitalization", "video_id": "fa-VZ-SDxgY", "youtube_id": "fa-VZ-SDxgY", "readable_id": "price-and-market-capitalization"}, "0D_rc92g27w": {"duration": 398, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/rembrandt-nightwatch/", "keywords": "", "id": "0D_rc92g27w", "title": "Rembrandt, The Night Watch", "description": "Rembrandt van Rijn, The Night Watch (Militia Company of District II under the Command of Captain Frans Banninck Cocq), 1642, oil on canvas, 379.5 x 453.5 cm (Rijksmuseum, Amsterdam)\n\nSpeakers: Dr Beth Harris and Dr. Steven Zucker", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/0D_rc92g27w.mp4/0D_rc92g27w.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/0D_rc92g27w.mp4/0D_rc92g27w.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/0D_rc92g27w.m3u8/0D_rc92g27w.m3u8"}, "slug": "rembrandt-nightwatch", "video_id": "0D_rc92g27w", "youtube_id": "0D_rc92g27w", "readable_id": "rembrandt-nightwatch"}, "sQYpUJV8foY": {"duration": 604, "path": "khan/math/algebra2/exponential_and_logarithmic_func/continuous_compounding/compound-interest-and-e-part-3/", "keywords": "continuous, compounding, interest, math, finance", "id": "sQYpUJV8foY", "title": "Compound interest and e (part 3)", "description": "Continuously compounding $P in principal at an annual interest rate of r for a year ends up with a final payment of $Pe^r", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/sQYpUJV8foY.mp4/sQYpUJV8foY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/sQYpUJV8foY.mp4/sQYpUJV8foY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/sQYpUJV8foY.m3u8/sQYpUJV8foY.m3u8"}, "slug": "compound-interest-and-e-part-3", "video_id": "sQYpUJV8foY", "youtube_id": "sQYpUJV8foY", "readable_id": "compound-interest-and-e-part-3"}, "JZRY6Eco7BM": {"duration": 324, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/francis-bacon-triptych-august-1972-1972/", "keywords": "Francis Bacon, Triptych, Tate Modern, Art History, Art, Smarthistory", "id": "JZRY6Eco7BM", "title": "Bacon, Triptych - August 1972", "description": "Francis Bacon, Triptych - August 1972, 1972, oil on canvas, 72 x 61 x 22 in. (183 x 155 x 64 cm), (Tate Modern, London)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker\n\nFor more: http://smarthistory.org/francis-bacon-triptych-august-1972.html", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/JZRY6Eco7BM.mp4/JZRY6Eco7BM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/JZRY6Eco7BM.mp4/JZRY6Eco7BM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/JZRY6Eco7BM.m3u8/JZRY6Eco7BM.m3u8"}, "slug": "francis-bacon-triptych-august-1972-1972", "video_id": "JZRY6Eco7BM", "youtube_id": "JZRY6Eco7BM", "readable_id": "francis-bacon-triptych-august-1972-1972"}, "IZgM4NPN4eU": {"duration": 483, "path": "khan/test-prep/mcat/individuals-and-society/self-presentation-and-interacting-with-others/three-components-of-emotion-and-universal-emotions/", "keywords": "", "id": "IZgM4NPN4eU", "title": "Three components of emotion and universal emotions", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/IZgM4NPN4eU.mp4/IZgM4NPN4eU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/IZgM4NPN4eU.mp4/IZgM4NPN4eU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/IZgM4NPN4eU.m3u8/IZgM4NPN4eU.m3u8"}, "slug": "three-components-of-emotion-and-universal-emotions", "video_id": "IZgM4NPN4eU", "youtube_id": "IZgM4NPN4eU", "readable_id": "three-components-of-emotion-and-universal-emotions"}, "z9LxdqYntlU": {"duration": 840, "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/mixtures-and-solutions/boiling-point-elevation-and-freezing-point-supression/", "keywords": "chemistry, solution, molality", "id": "z9LxdqYntlU", "title": "Boiling point elevation and freezing point depression", "description": "Raising or lowering the boiling or freezing point of a solution by adding solute.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z9LxdqYntlU.mp4/z9LxdqYntlU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z9LxdqYntlU.mp4/z9LxdqYntlU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z9LxdqYntlU.m3u8/z9LxdqYntlU.m3u8"}, "slug": "boiling-point-elevation-and-freezing-point-supression", "video_id": "z9LxdqYntlU", "youtube_id": "z9LxdqYntlU", "readable_id": "boiling-point-elevation-and-freezing-point-supression"}, "ey_b3aPsRl8": {"duration": 233, "path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/simplifying-rational-expressions-3/", "keywords": "U11_L1_T1_we3, Simplifying, Rational, Expressions, CC_39336_A-APR_6, CC_39336_A-APR_7, CC_39336_A-CED_1, CC_39336_A-REI_2, CC_39336_A-SSE_2, CC_39336_F-IF_2, CC_39336_F-IF_5", "id": "ey_b3aPsRl8", "title": "How to simplify a rational expression by canceling factors with opposite signs (example)", "description": "Sal\u00a0simplifies and states the domain of (x^2-36)/(6-x).", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ey_b3aPsRl8.mp4/ey_b3aPsRl8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ey_b3aPsRl8.mp4/ey_b3aPsRl8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ey_b3aPsRl8.m3u8/ey_b3aPsRl8.m3u8"}, "slug": "simplifying-rational-expressions-3", "video_id": "ey_b3aPsRl8", "youtube_id": "ey_b3aPsRl8", "readable_id": "simplifying-rational-expressions-3"}, "dawGZs4TaTU": {"duration": 494, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/super-yoga/super-yoga-plans-solving-systems-by-substitution/", "keywords": "", "id": "dawGZs4TaTU", "title": "Super Yoga plans: Solving systems by substitution", "description": "Continuing our Yoga plan debate by determining where the lines representing the two plans intersect", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dawGZs4TaTU.mp4/dawGZs4TaTU.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dawGZs4TaTU.mp4/dawGZs4TaTU.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dawGZs4TaTU.m3u8/dawGZs4TaTU.m3u8"}, "slug": "super-yoga-plans-solving-systems-by-substitution", "video_id": "dawGZs4TaTU", "youtube_id": "dawGZs4TaTU", "readable_id": "super-yoga-plans-solving-systems-by-substitution"}, "QP8ImP6NCk8": {"duration": 898, "path": "khan/test-prep/mcat/organ-systems/hematologic-system/hemoglobin-moves-o2-and-co2/", "keywords": "", "id": "QP8ImP6NCk8", "title": "Hemoglobin moves O2 and CO2", "description": "Learn the two ways that oxygen moves from the lungs to the tissues, and the three ways that carbon dioxide returns from the tissues to the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/QP8ImP6NCk8.mp4/QP8ImP6NCk8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/QP8ImP6NCk8.mp4/QP8ImP6NCk8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/QP8ImP6NCk8.m3u8/QP8ImP6NCk8.m3u8"}, "slug": "hemoglobin-moves-o2-and-co2", "video_id": "QP8ImP6NCk8", "youtube_id": "QP8ImP6NCk8", "readable_id": "hemoglobin-moves-o2-and-co2"}, "1iWdTbXvHx0": {"duration": 224, "path": "khan/partner-content/exploratorium/light-and-color/cd-spectroscope/cd-spectroscope-build/", "keywords": "", "id": "1iWdTbXvHx0", "title": "Build your own CD spectroscope: Materials, tools, and steps", "description": "Learn\u00a0how to make a\u00a0simple\u2014but effective\u2014spectroscope out of an old CD and a cardboard tube.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1iWdTbXvHx0.mp4/1iWdTbXvHx0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1iWdTbXvHx0.mp4/1iWdTbXvHx0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1iWdTbXvHx0.m3u8/1iWdTbXvHx0.m3u8"}, "slug": "cd-spectroscope-build", "video_id": "1iWdTbXvHx0", "youtube_id": "1iWdTbXvHx0", "readable_id": "cd-spectroscope-build"}, "4gwbyfERDrA": {"duration": 282, "path": "khan/humanities/global-culture/identity-body/identity-body-europe/fiona-rae/", "keywords": "Tate", "id": "4gwbyfERDrA", "title": "Fiona Rae on paint and passion", "description": "This video brought to you by\u00a0Tate.org.uk\n\nYBA (Young British Artist) Fiona Rae\u2019s paintings are clever, lively, and full of restless energy. Her abstract canvases are an exuberant collision of painting styles: encrusted surfaces, brushy swathes and watery pools, along with kitsch cartoon elements, which somehow coalesce despite their differences. Similarly exuberant is Rae\u2019s method of painting, using an eight-foot-long palette, an array of vivid colours, and a cart full of brushes she uses to craft her canvases.\nMany years into her artistic career,\u00a0Rae admits she is still amazed by the possibilities of painting, and her passion for paint is evident in the way she speaks about it. Do you think that passion for a particular material can change the way an artist uses it?\n\nRead more about Fiona Rae and explore her work in the Tate Collection here.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/4gwbyfERDrA.mp4/4gwbyfERDrA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/4gwbyfERDrA.mp4/4gwbyfERDrA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/4gwbyfERDrA.m3u8/4gwbyfERDrA.m3u8"}, "slug": "fiona-rae", "video_id": "4gwbyfERDrA", "youtube_id": "4gwbyfERDrA", "readable_id": "fiona-rae"}, "O9zSHs1TWMM": {"duration": 150, "path": "khan/math/arithmetic/addition-subtraction/addition_carrying/why-carrying-works/", "keywords": "", "id": "O9zSHs1TWMM", "title": "Adding: why carrying works", "description": "Sometimes when we add, we carry our tens to the next column. Let's watch this so we can understand why it works.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/O9zSHs1TWMM.mp4/O9zSHs1TWMM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/O9zSHs1TWMM.mp4/O9zSHs1TWMM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/O9zSHs1TWMM.m3u8/O9zSHs1TWMM.m3u8"}, "slug": "why-carrying-works", "video_id": "O9zSHs1TWMM", "youtube_id": "O9zSHs1TWMM", "readable_id": "why-carrying-works"}, "6bQ6HJsAv4A": {"duration": 184, "path": "khan/math/on-sixth-grade-math/on-measurement/on-unit-conversion/cm-to-meters/", "keywords": "", "id": "6bQ6HJsAv4A", "title": "Unit conversion: centimeters to meters", "description": "Which are smaller: centimeters or meters? If you know the answer to that question, then solving this problem gets a little easier. Let's convert centimeters to meters.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6bQ6HJsAv4A.mp4/6bQ6HJsAv4A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6bQ6HJsAv4A.mp4/6bQ6HJsAv4A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6bQ6HJsAv4A.m3u8/6bQ6HJsAv4A.m3u8"}, "slug": "cm-to-meters", "video_id": "6bQ6HJsAv4A", "youtube_id": "6bQ6HJsAv4A", "readable_id": "cm-to-meters"}, "XuwldEyWjH0": {"duration": 232, "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/u09-l2-t1-we1-factoring-special-products-1/", "keywords": "U09_L2_T1_we1, Factoring, Special, Products, CC_39336_A-SSE_2", "id": "XuwldEyWjH0", "title": "How to factor quadratics as a perfect square of a sum: (a+b)^2 (example)", "description": "Sal factors -4t^2-12t-9 as -1(2t+3)(2t+3), or -(2t+3)^2.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XuwldEyWjH0.mp4/XuwldEyWjH0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XuwldEyWjH0.mp4/XuwldEyWjH0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XuwldEyWjH0.m3u8/XuwldEyWjH0.m3u8"}, "slug": "u09-l2-t1-we1-factoring-special-products-1", "video_id": "XuwldEyWjH0", "youtube_id": "XuwldEyWjH0", "readable_id": "u09-l2-t1-we1-factoring-special-products-1"}, "v6-Ijv3wOAM": {"duration": 406, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions/pharyngitis/", "keywords": "", "id": "v6-Ijv3wOAM", "title": "Pharyngitis", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/v6-Ijv3wOAM.mp4/v6-Ijv3wOAM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/v6-Ijv3wOAM.mp4/v6-Ijv3wOAM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/v6-Ijv3wOAM.m3u8/v6-Ijv3wOAM.m3u8"}, "slug": "pharyngitis", "video_id": "v6-Ijv3wOAM", "youtube_id": "v6-Ijv3wOAM", "readable_id": "pharyngitis"}, "ZVl1M3D2B80": {"duration": 417, "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/pulmonary-hypertension-symptoms-and-causes/", "keywords": "", "id": "ZVl1M3D2B80", "title": "Pulmonary hypertension symptoms and causes", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ZVl1M3D2B80.mp4/ZVl1M3D2B80.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ZVl1M3D2B80.mp4/ZVl1M3D2B80.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ZVl1M3D2B80.m3u8/ZVl1M3D2B80.m3u8"}, "slug": "pulmonary-hypertension-symptoms-and-causes", "video_id": "ZVl1M3D2B80", "youtube_id": "ZVl1M3D2B80", "readable_id": "pulmonary-hypertension-symptoms-and-causes"}, "XBI7DqttyOQ": {"duration": 744, "path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/debt-loops-rationale-and-effects/", "keywords": "renminbi, china, currency, export, growth", "id": "XBI7DqttyOQ", "title": "Debt loops rationale and effects", "description": "Positive and negative effects of China's devaluing of their currency", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XBI7DqttyOQ.mp4/XBI7DqttyOQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XBI7DqttyOQ.mp4/XBI7DqttyOQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XBI7DqttyOQ.m3u8/XBI7DqttyOQ.m3u8"}, "slug": "debt-loops-rationale-and-effects", "video_id": "XBI7DqttyOQ", "youtube_id": "XBI7DqttyOQ", "readable_id": "debt-loops-rationale-and-effects"}, "e5oGdNL1GkA": {"duration": 562, "path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/buoyant-force-example-problems-edited/", "keywords": "", "id": "e5oGdNL1GkA", "title": "Buoyant force example problems edited", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/e5oGdNL1GkA.mp4/e5oGdNL1GkA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/e5oGdNL1GkA.mp4/e5oGdNL1GkA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/e5oGdNL1GkA.m3u8/e5oGdNL1GkA.m3u8"}, "slug": "buoyant-force-example-problems-edited", "video_id": "e5oGdNL1GkA", "youtube_id": "e5oGdNL1GkA", "readable_id": "buoyant-force-example-problems-edited"}, "1BGlbx67B6s": {"duration": 462, "path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-6a/", "keywords": "calculus", "id": "1BGlbx67B6s", "title": "2011 Calculus BC free response #6a", "description": "Taylor Series approximation of sin(x)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1BGlbx67B6s.mp4/1BGlbx67B6s.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1BGlbx67B6s.mp4/1BGlbx67B6s.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1BGlbx67B6s.m3u8/1BGlbx67B6s.m3u8"}, "slug": "2011-calculus-bc-free-response-6a", "video_id": "1BGlbx67B6s", "youtube_id": "1BGlbx67B6s", "readable_id": "2011-calculus-bc-free-response-6a"}, "fpt4WW3EUxY": {"duration": 125, "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/sentence-boundries-harder/", "keywords": "education,online learning,learning,lessons", "id": "fpt4WW3EUxY", "title": "Writing: Sentence boundaries \u2014 Harder example", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing sentence boundaries.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/fpt4WW3EUxY.mp4/fpt4WW3EUxY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/fpt4WW3EUxY.mp4/fpt4WW3EUxY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/fpt4WW3EUxY.m3u8/fpt4WW3EUxY.m3u8"}, "slug": "sentence-boundries-harder", "video_id": "fpt4WW3EUxY", "youtube_id": "fpt4WW3EUxY", "readable_id": "sentence-boundries-harder"}, "wvwLy9ifmX0": {"duration": 422, "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/oxidation-of-alcohols-ii-examples/", "keywords": "", "id": "wvwLy9ifmX0", "title": "Oxidation of alcohols II: Examples", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/wvwLy9ifmX0.mp4/wvwLy9ifmX0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/wvwLy9ifmX0.mp4/wvwLy9ifmX0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/wvwLy9ifmX0.m3u8/wvwLy9ifmX0.m3u8"}, "slug": "oxidation-of-alcohols-ii-examples", "video_id": "wvwLy9ifmX0", "youtube_id": "wvwLy9ifmX0", "readable_id": "oxidation-of-alcohols-ii-examples"}, "GR9d9wrOl5E": {"duration": 631, "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/treating-hiv-antiretroviral-drugs/", "keywords": "Management Of HIV/AIDS (Medical Treatment),HIV (Disease Cause),Health (Industry),Pharmaceutical Drug (Medical Treatment)", "id": "GR9d9wrOl5E", "title": "Treating HIV: Antiretroviral drugs", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/GR9d9wrOl5E.mp4/GR9d9wrOl5E.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/GR9d9wrOl5E.mp4/GR9d9wrOl5E.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/GR9d9wrOl5E.m3u8/GR9d9wrOl5E.m3u8"}, "slug": "treating-hiv-antiretroviral-drugs", "video_id": "GR9d9wrOl5E", "youtube_id": "GR9d9wrOl5E", "readable_id": "treating-hiv-antiretroviral-drugs"}, "9mU3MVtsqic": {"duration": 145, "path": "khan/math/precalculus/prob_comb/independent_events_precalc/compound-events-diagram/", "keywords": "", "id": "9mU3MVtsqic", "title": "Compound events example using diagram", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9mU3MVtsqic.mp4/9mU3MVtsqic.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9mU3MVtsqic.mp4/9mU3MVtsqic.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9mU3MVtsqic.m3u8/9mU3MVtsqic.m3u8"}, "slug": "compound-events-diagram", "video_id": "9mU3MVtsqic", "youtube_id": "9mU3MVtsqic", "readable_id": "compound-events-diagram"}, "EFsaaK1w2Ao": {"duration": 254, "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-baldacchino/", "keywords": "bernini, baldacchino, St. Peter's Basilica, Vatican, Rome", "id": "EFsaaK1w2Ao", "title": "Gian Lorenzo Bernini, Baldacchino", "description": "Bernini, Baldacchino, 1624-33, 100 feet high, gilded bronze (Saint Peter's Basilica, Vatican City, Rome)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/EFsaaK1w2Ao.mp4/EFsaaK1w2Ao.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/EFsaaK1w2Ao.mp4/EFsaaK1w2Ao.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/EFsaaK1w2Ao.m3u8/EFsaaK1w2Ao.m3u8"}, "slug": "bernini-baldacchino", "video_id": "EFsaaK1w2Ao", "youtube_id": "EFsaaK1w2Ao", "readable_id": "bernini-baldacchino"}, "1p0NHR5w0Lc": {"duration": 507, "path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/trapezoidal-approximation-of-area-under-curve/", "keywords": "", "id": "1p0NHR5w0Lc", "title": "Trapezoidal approximation of area under curve", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1p0NHR5w0Lc.mp4/1p0NHR5w0Lc.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1p0NHR5w0Lc.mp4/1p0NHR5w0Lc.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1p0NHR5w0Lc.m3u8/1p0NHR5w0Lc.m3u8"}, "slug": "trapezoidal-approximation-of-area-under-curve", "video_id": "1p0NHR5w0Lc", "youtube_id": "1p0NHR5w0Lc", "readable_id": "trapezoidal-approximation-of-area-under-curve"}, "Vqce2dtg45U": {"duration": 653, "path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/countercurrent-multiplication-in-the-kidney/", "keywords": "", "id": "Vqce2dtg45U", "title": "Countercurrent multiplication in the kidney", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Vqce2dtg45U.mp4/Vqce2dtg45U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Vqce2dtg45U.mp4/Vqce2dtg45U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Vqce2dtg45U.m3u8/Vqce2dtg45U.m3u8"}, "slug": "countercurrent-multiplication-in-the-kidney", "video_id": "Vqce2dtg45U", "youtube_id": "Vqce2dtg45U", "readable_id": "countercurrent-multiplication-in-the-kidney"}, "mS7t91U9Qqg": {"duration": 227, "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/treasury-bond-prices-and-yields/", "keywords": "treasury, yield, debt", "id": "mS7t91U9Qqg", "title": "Treasury bond prices and yields", "description": "Why yields go down when prices go up", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/mS7t91U9Qqg.mp4/mS7t91U9Qqg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/mS7t91U9Qqg.mp4/mS7t91U9Qqg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/mS7t91U9Qqg.m3u8/mS7t91U9Qqg.m3u8"}, "slug": "treasury-bond-prices-and-yields", "video_id": "mS7t91U9Qqg", "youtube_id": "mS7t91U9Qqg", "readable_id": "treasury-bond-prices-and-yields"}, "57BiI_iD3-U": {"duration": 772, "path": "khan/math/precalculus/parametric_equations/parametric/parametric-equations-3/", "keywords": "parametric, equation, ellipse, CC_39336_F-BF_1_c", "id": "57BiI_iD3-U", "title": "Parametric equations 3", "description": "Removing the parameter from a more interesting example", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/57BiI_iD3-U.mp4/57BiI_iD3-U.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/57BiI_iD3-U.mp4/57BiI_iD3-U.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/57BiI_iD3-U.m3u8/57BiI_iD3-U.m3u8"}, "slug": "parametric-equations-3", "video_id": "57BiI_iD3-U", "youtube_id": "57BiI_iD3-U", "readable_id": "parametric-equations-3"}, "-YI6UC4qVEY": {"duration": 283, "path": "khan/math/geometry/basic-geometry/heron_formula_tutorial/heron-s-formula/", "keywords": "heron's, formula, geometry, area, triangle", "id": "-YI6UC4qVEY", "title": "Heron's formula", "description": "Using Heron's Formula to determine the area of a triangle while only knowing the lengths of the sides", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/-YI6UC4qVEY.mp4/-YI6UC4qVEY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/-YI6UC4qVEY.mp4/-YI6UC4qVEY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/-YI6UC4qVEY.m3u8/-YI6UC4qVEY.m3u8"}, "slug": "heron-s-formula", "video_id": "-YI6UC4qVEY", "youtube_id": "-YI6UC4qVEY", "readable_id": "heron-s-formula"}, "1abpdO27KTo": {"duration": 401, "path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/youngs-double-slit-part-2/", "keywords": "", "id": "1abpdO27KTo", "title": "Young's Double slit part 2", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/1abpdO27KTo.mp4/1abpdO27KTo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/1abpdO27KTo.mp4/1abpdO27KTo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/1abpdO27KTo.m3u8/1abpdO27KTo.m3u8"}, "slug": "youngs-double-slit-part-2", "video_id": "1abpdO27KTo", "youtube_id": "1abpdO27KTo", "readable_id": "youngs-double-slit-part-2"}, "3RDytvJYehY": {"duration": 753, "path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-3-electron-clouds/", "keywords": "", "id": "3RDytvJYehY", "title": "VSEPR for 3 electron clouds", "description": "VSEPR for three electron clouds including examples for trigonal planar and bent molecules.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/3RDytvJYehY.mp4/3RDytvJYehY.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/3RDytvJYehY.mp4/3RDytvJYehY.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/3RDytvJYehY.m3u8/3RDytvJYehY.m3u8"}, "slug": "vsepr-for-3-electron-clouds", "video_id": "3RDytvJYehY", "youtube_id": "3RDytvJYehY", "readable_id": "vsepr-for-3-electron-clouds"}, "2WjGD3LZEWo": {"duration": 136, "path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/figuring-out-angles-between-transversal-and-parallel-lines/", "keywords": "", "id": "2WjGD3LZEWo", "title": "Figuring out angles between transversal and parallel lines", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/2WjGD3LZEWo.mp4/2WjGD3LZEWo.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/2WjGD3LZEWo.mp4/2WjGD3LZEWo.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/2WjGD3LZEWo.m3u8/2WjGD3LZEWo.m3u8"}, "slug": "figuring-out-angles-between-transversal-and-parallel-lines", "video_id": "2WjGD3LZEWo", "youtube_id": "2WjGD3LZEWo", "readable_id": "figuring-out-angles-between-transversal-and-parallel-lines"}, "ALU24yhKJZw": {"duration": 336, "path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/enzymatic-inhibition-and-lineweaver-burke-plots/", "keywords": "", "id": "ALU24yhKJZw", "title": "Enzymatic inhibition and Lineweaver Burke plots", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/ALU24yhKJZw.mp4/ALU24yhKJZw.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/ALU24yhKJZw.mp4/ALU24yhKJZw.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/ALU24yhKJZw.m3u8/ALU24yhKJZw.m3u8"}, "slug": "enzymatic-inhibition-and-lineweaver-burke-plots", "video_id": "ALU24yhKJZw", "youtube_id": "ALU24yhKJZw", "readable_id": "enzymatic-inhibition-and-lineweaver-burke-plots"}, "dbxJ6LD0344": {"duration": 241, "path": "khan/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex/complex-conjugates-example/", "keywords": "u16_l4_t2_we4, Complex, Conjugates", "id": "dbxJ6LD0344", "title": "Complex conjugates example", "description": "Complex Conjugates", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/dbxJ6LD0344.mp4/dbxJ6LD0344.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/dbxJ6LD0344.mp4/dbxJ6LD0344.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/dbxJ6LD0344.m3u8/dbxJ6LD0344.m3u8"}, "slug": "complex-conjugates-example", "video_id": "dbxJ6LD0344", "youtube_id": "dbxJ6LD0344", "readable_id": "complex-conjugates-example"}, "MHgi8ZQCG0I": {"duration": 142, "path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/constructing-two-variable-linear-inequality-word-problem/", "keywords": "education,online learning,learning,lessons", "id": "MHgi8ZQCG0I", "title": "How to model a real-world situation with a two-variable linear inequality (example)", "description": "Sal models a word problem about scores in a chess tournament by creating a two-variable linear inequality.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MHgi8ZQCG0I.mp4/MHgi8ZQCG0I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MHgi8ZQCG0I.mp4/MHgi8ZQCG0I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MHgi8ZQCG0I.m3u8/MHgi8ZQCG0I.m3u8"}, "slug": "constructing-two-variable-linear-inequality-word-problem", "video_id": "MHgi8ZQCG0I", "youtube_id": "MHgi8ZQCG0I", "readable_id": "constructing-two-variable-linear-inequality-word-problem"}, "59UeshgSuEE": {"duration": 547, "path": "khan/math/integral-calculus/solid_revolution_topic/function-average-value/mean-value-theorem-integrals/", "keywords": "", "id": "59UeshgSuEE", "title": "Mean value theorem for integrals", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/59UeshgSuEE.mp4/59UeshgSuEE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/59UeshgSuEE.mp4/59UeshgSuEE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/59UeshgSuEE.m3u8/59UeshgSuEE.m3u8"}, "slug": "mean-value-theorem-integrals", "video_id": "59UeshgSuEE", "youtube_id": "59UeshgSuEE", "readable_id": "mean-value-theorem-integrals"}, "bRZmfc1YFsQ": {"duration": 234, "path": "khan/math/differential-calculus/taking-derivatives/power_rule_tutorial/power-rule/", "keywords": "", "id": "bRZmfc1YFsQ", "title": "Power rule", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/bRZmfc1YFsQ.mp4/bRZmfc1YFsQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/bRZmfc1YFsQ.mp4/bRZmfc1YFsQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/bRZmfc1YFsQ.m3u8/bRZmfc1YFsQ.m3u8"}, "slug": "power-rule", "video_id": "bRZmfc1YFsQ", "youtube_id": "bRZmfc1YFsQ", "readable_id": "power-rule"}, "kGzXIbauGQk": {"duration": 74, "path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/plotting-complex-numbers-on-the-complex-plane/", "keywords": "", "id": "kGzXIbauGQk", "title": "Plotting complex numbers on the complex plane", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/kGzXIbauGQk.mp4/kGzXIbauGQk.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/kGzXIbauGQk.mp4/kGzXIbauGQk.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/kGzXIbauGQk.m3u8/kGzXIbauGQk.m3u8"}, "slug": "plotting-complex-numbers-on-the-complex-plane", "video_id": "kGzXIbauGQk", "youtube_id": "kGzXIbauGQk", "readable_id": "plotting-complex-numbers-on-the-complex-plane"}, "P1DJxuG7U9A": {"duration": 320, "path": "khan/math/differential-calculus/limits_topic/continuity-limits/fancy-algebra-to-find-a-limit-and-make-a-function-continuous/", "keywords": "", "id": "P1DJxuG7U9A", "title": "Fancy algebra to find a limit and make a function continuous", "description": "", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/P1DJxuG7U9A.mp4/P1DJxuG7U9A.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/P1DJxuG7U9A.mp4/P1DJxuG7U9A.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/P1DJxuG7U9A.m3u8/P1DJxuG7U9A.m3u8"}, "slug": "fancy-algebra-to-find-a-limit-and-make-a-function-continuous", "video_id": "P1DJxuG7U9A", "youtube_id": "P1DJxuG7U9A", "readable_id": "fancy-algebra-to-find-a-limit-and-make-a-function-continuous"}, "6YU9HVS2GT0": {"duration": 874, "path": "khan/science/health-and-medicine/health-care-system/health-care-costs-in-us-vs-europe/", "keywords": "marquee", "id": "6YU9HVS2GT0", "title": "Health care costs in US vs Europe", "description": "A discussion about US health care costs", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/6YU9HVS2GT0.mp4/6YU9HVS2GT0.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/6YU9HVS2GT0.mp4/6YU9HVS2GT0.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/6YU9HVS2GT0.m3u8/6YU9HVS2GT0.m3u8"}, "slug": "health-care-costs-in-us-vs-europe", "video_id": "6YU9HVS2GT0", "youtube_id": "6YU9HVS2GT0", "readable_id": "health-care-costs-in-us-vs-europe"}, "uBVhtGL9y88": {"duration": 643, "path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/amplitude-and-period-cosine-transformations/", "keywords": "trig, amplitude, period, cos", "id": "uBVhtGL9y88", "title": "Example: Amplitude and period cosine transformations", "description": "Visualizing changes in amplitude and period for a cosine function", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/uBVhtGL9y88.mp4/uBVhtGL9y88.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/uBVhtGL9y88.mp4/uBVhtGL9y88.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/uBVhtGL9y88.m3u8/uBVhtGL9y88.m3u8"}, "slug": "amplitude-and-period-cosine-transformations", "video_id": "uBVhtGL9y88", "youtube_id": "uBVhtGL9y88", "readable_id": "amplitude-and-period-cosine-transformations"}, "DXpZth7iBaQ": {"duration": 274, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p7-harder/", "keywords": "", "id": "DXpZth7iBaQ", "title": "Radical and rational equations \u2014 Harder example", "description": "Watch Sal work through a harder Radical and rational equations problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/DXpZth7iBaQ.mp4/DXpZth7iBaQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/DXpZth7iBaQ.mp4/DXpZth7iBaQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/DXpZth7iBaQ.m3u8/DXpZth7iBaQ.m3u8"}, "slug": "sat-math-p7-harder", "video_id": "DXpZth7iBaQ", "youtube_id": "DXpZth7iBaQ", "readable_id": "sat-math-p7-harder"}, "MpZEjEO_Sbg": {"duration": 121, "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p14-easier/", "keywords": "", "id": "MpZEjEO_Sbg", "title": "Isolating quantities \u2014 Basic example", "description": "Watch Sal work through a basic Isolating quantities problem.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/MpZEjEO_Sbg.mp4/MpZEjEO_Sbg.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/MpZEjEO_Sbg.mp4/MpZEjEO_Sbg.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/MpZEjEO_Sbg.m3u8/MpZEjEO_Sbg.m3u8"}, "slug": "sat-math-p14-easier", "video_id": "MpZEjEO_Sbg", "youtube_id": "MpZEjEO_Sbg", "readable_id": "sat-math-p14-easier"}, "hShqXKpI6KA": {"duration": 323, "path": "khan/math/pre-algebra/rates-and-ratios/unit_conversion/performing-arithmetic-calculations-on-units-of-volume/", "keywords": "U06_L1_T3_we2, Performing, arithmetic, calculations, on, units, of, volume, CC_3_MD_2, CC_4_MD_1, CC_4_MD_2, CC_5_MD_1, CC_5_MD_3, CC_5_MD_5, CC_5_MD_5_c, CC_6_RP_3_d, CC_7_G_6", "id": "hShqXKpI6KA", "title": "Unit conversion: arithmetic calculations on units of volume", "description": "Sometimes we have different units of measure and are asked to add them up. The answer can't be stated in ALL units so we have to pick one unit of measure. In this example, you'll practice that scenario with us.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/hShqXKpI6KA.mp4/hShqXKpI6KA.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/hShqXKpI6KA.mp4/hShqXKpI6KA.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/hShqXKpI6KA.m3u8/hShqXKpI6KA.m3u8"}, "slug": "performing-arithmetic-calculations-on-units-of-volume", "video_id": "hShqXKpI6KA", "youtube_id": "hShqXKpI6KA", "readable_id": "performing-arithmetic-calculations-on-units-of-volume"}, "9DxrF6Ttws4": {"duration": 750, "path": "khan/math/algebra/solving-linear-equations-and-inequalities/equations_beginner/one-step-equations/", "keywords": "One, Step, Equations, CC_39336_A-REI_3", "id": "9DxrF6Ttws4", "title": "Simple equations: examples solving a variety of forms", "description": "Some quick examples to practice solving a variety of one step equations. All 4 operations (add, subtract, multiple, divide) are paired with variables.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/9DxrF6Ttws4.mp4/9DxrF6Ttws4.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/9DxrF6Ttws4.mp4/9DxrF6Ttws4.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/9DxrF6Ttws4.m3u8/9DxrF6Ttws4.m3u8"}, "slug": "one-step-equations", "video_id": "9DxrF6Ttws4", "youtube_id": "9DxrF6Ttws4", "readable_id": "one-step-equations"}, "jqpQPxWj8gE": {"duration": 729, "path": "khan/math/recreational-math/puzzles/brain-teasers/forehead-numbers-brain-teaser/", "keywords": "logic, brain, teaser, math", "id": "jqpQPxWj8gE", "title": "Forehead numbers brain teaser", "description": "The perfect logicians are at it again.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/jqpQPxWj8gE.mp4/jqpQPxWj8gE.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/jqpQPxWj8gE.mp4/jqpQPxWj8gE.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/jqpQPxWj8gE.m3u8/jqpQPxWj8gE.m3u8"}, "slug": "forehead-numbers-brain-teaser", "video_id": "jqpQPxWj8gE", "youtube_id": "jqpQPxWj8gE", "readable_id": "forehead-numbers-brain-teaser"}, "Psl3LWRAysQ": {"duration": 52, "path": "khan/computing/computer-programming/meet-the-computing-professional/welcome-meet-the-computing-professional/", "keywords": "", "id": "Psl3LWRAysQ", "title": "Welcome to \"Meet the Professional\"!", "description": "Pamela welcomes you to our new series about computing professionals.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/Psl3LWRAysQ.mp4/Psl3LWRAysQ.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/Psl3LWRAysQ.mp4/Psl3LWRAysQ.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/Psl3LWRAysQ.m3u8/Psl3LWRAysQ.m3u8"}, "slug": "welcome-meet-the-computing-professional", "video_id": "Psl3LWRAysQ", "youtube_id": "Psl3LWRAysQ", "readable_id": "welcome-meet-the-computing-professional"}, "r6hS_8nm1jM": {"duration": 142, "path": "khan/math/pre-algebra/negatives-absolute-value-pre-alg/abs-value-pre-alg/absolute-value-of-integers/", "keywords": "U09_L1_T2_we2, Absolute, Value, of, Integers, CC_6_NS_7, CC_6_NS_7_c", "id": "r6hS_8nm1jM", "title": "Absolute value of integers", "description": "Let's mix a little algebra into our discussion of absolute value. What if we are looking for the |x|? If we know what x equals, we can do it. Follow along.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/r6hS_8nm1jM.mp4/r6hS_8nm1jM.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/r6hS_8nm1jM.mp4/r6hS_8nm1jM.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/r6hS_8nm1jM.m3u8/r6hS_8nm1jM.m3u8"}, "slug": "absolute-value-of-integers", "video_id": "r6hS_8nm1jM", "youtube_id": "r6hS_8nm1jM", "readable_id": "absolute-value-of-integers"}, "XwIs1nlDQ2I": {"duration": 230, "path": "khan/math/recreational-math/vi-hart/thanksgiving-math/green-bean-matherole/", "keywords": "", "id": "XwIs1nlDQ2I", "title": "Green bean matherole", "description": "This Thanksgiving, make sure your table isn't missing the all-important green bean matherole. Pick your favorite vector field and have at it!\n\nMathed Potatoes: http://youtu.be/F5RyVWI4Onk\nBorromean Onion Rings: http://youtu.be/4tsjCND2ZfM\nTurduckenen-duckenen: http://youtu.be/pjrI91J6jOw", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/XwIs1nlDQ2I.mp4/XwIs1nlDQ2I.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/XwIs1nlDQ2I.mp4/XwIs1nlDQ2I.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/XwIs1nlDQ2I.m3u8/XwIs1nlDQ2I.m3u8"}, "slug": "green-bean-matherole", "video_id": "XwIs1nlDQ2I", "youtube_id": "XwIs1nlDQ2I", "readable_id": "green-bean-matherole"}, "n9C7sMb7MmI": {"duration": 400, "path": "khan/humanities/art-islam/islamic-art-late-period/damascus-room/", "keywords": "", "id": "n9C7sMb7MmI", "title": "Qa'a: The Damascus room", "description": "Reception Room (Qa'a), Ottoman period, 1119 a.h. / 1707 a.d., Damascus, Syria, poplar, gesso relief with gold and tin leaf, glazes and paint; cypress, poplar, walnut, black mulberry, mother-of pearl, marble and other stones, stucco with glass, plaster, ceramic tiles, iron, brass, 22 feet and a 1/2 inch high x 16 feet, 8-1/2 inches deep x 26 feet, 4-3/4 inches long, Metropolitan Museum of Art.\nA conversation between Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker by the Damascus Room.", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/n9C7sMb7MmI.mp4/n9C7sMb7MmI.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/n9C7sMb7MmI.mp4/n9C7sMb7MmI.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/n9C7sMb7MmI.m3u8/n9C7sMb7MmI.m3u8"}, "slug": "damascus-room", "video_id": "n9C7sMb7MmI", "youtube_id": "n9C7sMb7MmI", "readable_id": "damascus-room"}, "z9s_uJlG3b8": {"duration": 257, "path": "khan/humanities/art-americas/us-art-19c/realism-us/winslow-homer-the-fog-warning-halibut-fishing-1885/", "keywords": "Winslow Homer, Homer, The Fog Warning, Fog, Warning, Halibut, Fishing, 1885, Museum of Fine Arts, Boston, American, Painting, Atlantic, outer banks, dory, sublime, 19th century, realism, Maine, art history, art, Smarthistory, Google Art Project, Khan Academy, OER", "id": "z9s_uJlG3b8", "title": "Homer, The Fog Warning (Halibut Fishing)", "description": "Winslow Homer, The Fog Warning (Halibut Fishing), 1885, oil on canvas, 30-1/4 x 48-1/2 inches / 76.83 x 123.19 cm (Museum of Fine Arts, Boston)", "format": "mp4", "kind": "Video", "download_urls": {"mp4": "http://fastly.kastatic.org/KA-youtube-converted/z9s_uJlG3b8.mp4/z9s_uJlG3b8.mp4", "png": "http://fastly.kastatic.org/KA-youtube-converted/z9s_uJlG3b8.mp4/z9s_uJlG3b8.png", "m3u8": "http://fastly.kastatic.org/KA-youtube-converted/z9s_uJlG3b8.m3u8/z9s_uJlG3b8.m3u8"}, "slug": "winslow-homer-the-fog-warning-halibut-fishing-1885", "video_id": "z9s_uJlG3b8", "youtube_id": "z9s_uJlG3b8", "readable_id": "winslow-homer-the-fog-warning-halibut-fishing-1885"}, "U1lQbh21y1k": {"duration": 140, "path": "khan/math/algebra/algebra-functions/functions-average-rate-of-change/average-rate-of-change-example-3/", "keywords": "", "id": "U1lQbh21y1k", "title": "How to find the average rate of change from a table (example)", "description": "Sal finds the average rate of change of a function over the interval -5 1.", "slug": "testing-solutions-for-a-system-of-inequalities"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/checking-solutions-of-inequalities/checking-solutions-to-systems-of-inequalities/", "id": "checking-solutions-to-systems-of-inequalities", "title": "Check solutions of systems of inequalities", "description": "Check whether an ordered pair is a solution of a system of two-variable linear inequalities.", "slug": "checking-solutions-to-systems-of-inequalities", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to check possible solutions of two-variable linear inequalities. For example, is (2, 0) a solution to y>x+1? In this tutorial, we also check solutions to systems of inequalities.", "node_slug": "checking-solutions-of-inequalities", "render_type": "Tutorial", "topic_page_url": "/math/algebra/two-variable-linear-inequalities/checking-solutions-of-inequalities", "extended_slug": "math/algebra/two-variable-linear-inequalities/checking-solutions-of-inequalities", "kind": "Topic", "slug": "checking-solutions-of-inequalities"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/two-variable-linear-inequalities/constraining-solutions-of-inequalities/", "id": "constraining-solutions-of-inequalities", "hide": false, "title": "Constraining solutions of two-variable inequalities", "child_data": [{"kind": "Video", "id": "x1849794a"}, {"kind": "Exercise", "id": "237920064"}, {"kind": "Video", "id": "x66f6081c"}, {"kind": "Exercise", "id": "415898215"}], "children": [{"path": "khan/math/algebra/two-variable-linear-inequalities/constraining-solutions-of-inequalities/constraining-solutions-to-two-variable-linear-inequalities/", "id": "a5YZ7-JRSUE", "title": "How to constraint the solution set of a two variable linear inequality (example)", "kind": "Video", "description": "Sal determines which x-values make the ordered pair (x,-7) a solution of 2x-7y<25. He also solves a similar problem where the inequality is given as a graph.", "slug": "constraining-solutions-to-two-variable-linear-inequalities"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/constraining-solutions-of-inequalities/graphing_inequalities/", "id": "graphing_inequalities", "title": "Constraint solution sets of two-variable linear inequalities", "description": "Find the range of values of one variable that\u00a0corresponds to a given value of the other variable in a linear inequality.", "slug": "graphing_inequalities", "kind": "Exercise"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/constraining-solutions-of-inequalities/constraining-solutions-of-systems-of-inequalities/", "id": "BGyrSuW3GCg", "title": "How to constraint the solution set of a system of linear inequalities (example)", "kind": "Video", "description": "Given the graph of a system of inequalities, Sal finds the x-values that make the ordered pair (x,-2) a solution of the system, which is the solution set constrained to y=-2. Then he solves a similar problem where x is constrained to 4.", "slug": "constraining-solutions-of-systems-of-inequalities"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/constraining-solutions-of-inequalities/graphing_systems_of_inequalities/", "id": "graphing_systems_of_inequalities", "title": "Constraint solution sets of systems of linear inequalities", "description": "Find the range of values of one variable that\u00a0corresponds to a given value of the other variable in a system of two-variable linear inequalities.", "slug": "graphing_systems_of_inequalities", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Given a specific value for one of the variables in a two-variable linear inequality (or system of inequalities), learn how to find the corresponding range of values for the other variable. For example, given that x=3, what are the possible values for y in 2x+y<1 ?", "node_slug": "constraining-solutions-of-inequalities", "render_type": "Tutorial", "topic_page_url": "/math/algebra/two-variable-linear-inequalities/constraining-solutions-of-inequalities", "extended_slug": "math/algebra/two-variable-linear-inequalities/constraining-solutions-of-inequalities", "kind": "Topic", "slug": "constraining-solutions-of-inequalities"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/", "id": "graphing-inequalities", "hide": false, "title": "Graphing two-variable inequalities", "child_data": [{"kind": "Video", "id": "23672"}, {"kind": "Video", "id": "26874"}, {"kind": "Exercise", "id": "1080939128"}, {"kind": "Video", "id": "2600589"}, {"kind": "Exercise", "id": "379074129"}, {"kind": "Video", "id": "33752766"}, {"kind": "Video", "id": "26891"}, {"kind": "Exercise", "id": "426657621"}], "children": [{"path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphing-inequalities/", "id": "unSBFwK881s", "title": "Introduction to graphing inequalities", "kind": "Video", "description": "Learn how to graph two-variable linear inequalities.", "slug": "graphing-inequalities"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphing-linear-inequalities-in-two-variables-3/", "id": "YBYu5aZPLeg", "title": "How to find the inequality that is represented by a given graph (example)", "kind": "Video", "description": "Sal is given a graph and he analyzes it to find the underlying inequality.", "slug": "graphing-linear-inequalities-in-two-variables-3"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphs_of_inequalities/", "id": "graphs_of_inequalities", "title": "Find the inequality representing a given graph", "description": "Fit an algebraic inequality to its appropriate graph.", "slug": "graphs_of_inequalities", "kind": "Exercise"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphing-linear-inequalities-in-two-variables-example-2/", "id": "FnrqBgot3jM", "title": "How to graph a two-variable linear inequality (example)", "kind": "Video", "description": "Sal graphs the inequality y<3x+5.", "slug": "graphing-linear-inequalities-in-two-variables-example-2"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphing_inequalities_2/", "id": "graphing_inequalities_2", "title": "Graph inequalities and check solutions", "description": "Graph two-variable linear inequalities and check a solution using the graph.", "slug": "graphing_inequalities_2", "kind": "Exercise"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphical-system-of-inequalities/", "id": "CA4S7S-3Lg4", "title": "Introduction to graphing systems of linear inequalities", "kind": "Video", "description": "Learn how to graph systems of two-variable linear inequalities.", "slug": "graphical-system-of-inequalities"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphing-systems-of-inequalities-2/", "id": "YjT3QYfoy4Q", "title": "How to graph a system of inequalities and check a solution (example)", "kind": "Video", "description": "Sal determines the solution set of the following system: y\u22652x+1 and y<2x-5 and x>1. He does that by graphing the system and analyzing the graph.", "slug": "graphing-systems-of-inequalities-2"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/graphing-inequalities/graphing_systems_of_inequalities_2/", "id": "graphing_systems_of_inequalities_2", "title": "Graph systems of inequalities and check solutions", "description": "Graph systems of two-variable linear inequalities and check a solution using the graph.", "slug": "graphing_systems_of_inequalities_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to graph two-variables linear inequalities and systems of two-variable linear inequalities.", "node_slug": "graphing-inequalities", "render_type": "Tutorial", "topic_page_url": "/math/algebra/two-variable-linear-inequalities/graphing-inequalities", "extended_slug": "math/algebra/two-variable-linear-inequalities/graphing-inequalities", "kind": "Topic", "slug": "graphing-inequalities"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/", "id": "modeling-with-linear-inequalities", "hide": false, "title": "Modeling with linear inequalities", "child_data": [{"kind": "Video", "id": "xd477103a"}, {"kind": "Video", "id": "xecc8be0c"}, {"kind": "Video", "id": "xc18c0e7b"}, {"kind": "Video", "id": "x7f6281ad"}, {"kind": "Exercise", "id": "x6b062a2e"}, {"kind": "Video", "id": "2600587"}, {"kind": "Video", "id": "x78626c28"}, {"kind": "Video", "id": "xd4f8409b"}, {"kind": "Video", "id": "x5cab75bc"}, {"kind": "Exercise", "id": "xfffd1621"}], "children": [{"path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/constructing-two-variable-linear-inequality-word-problem/", "id": "MHgi8ZQCG0I", "title": "How to model a real-world situation with a two-variable linear inequality (example)", "kind": "Video", "description": "Sal models a word problem about scores in a chess tournament by creating a two-variable linear inequality.", "slug": "constructing-two-variable-linear-inequality-word-problem"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/analyzing-two-variable-linear-inequality/", "id": "TTYDbGXgcCk", "title": "How to analyze a two-variable linear inequality in terms of its context (example)", "kind": "Video", "description": "Sal is given a two-variable linear inequality that models a context about YouTube videos, and analyzes it to learn about the context.", "slug": "analyzing-two-variable-linear-inequality"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/solving-two-variable-linear-inequality-word-problem/", "id": "ysdY1iX_XCs", "title": "How to solve a word problem that uses a two-variable linear inequality (example)", "kind": "Video", "description": "Sal is given a two-variable linear inequality that models a context about watering plants, and answers a question about the solution set of the inequality in terms of the context.", "slug": "solving-two-variable-linear-inequality-word-problem"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/interpreting-visual-linear-inequality-word-problem/", "id": "DhiiGFuUE9I", "title": "How to analyze the graph of a two-variable linear inequality in terms of its context (example)", "kind": "Video", "description": "Sal is given the graph of a two-variable linear inequality that models a context about dog biscuits! He analyzes it to learn about the context and to check a possible solution.", "slug": "interpreting-visual-linear-inequality-word-problem"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/modeling-constraints/", "id": "modeling-constraints", "title": "Two-variable linear inequalities word problems", "description": "Solve word problems that involve linear inequalities.", "slug": "modeling-constraints", "kind": "Exercise"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/u06-l3-t1-we3-graphing-systems-of-inequalities/", "id": "BUmLw5m6F9s", "title": "Modeling situations with systems of linear inequalities", "kind": "Video", "description": "Sal models a real-world context into an algebraic system of linear inequalities and graphs it.", "slug": "u06-l3-t1-we3-graphing-systems-of-inequalities"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/creating-system-of-inequalities-word-problem/", "id": "jRnkxSfwIpU", "title": "How to model a real-world situation with a system of inequalities (example)", "kind": "Video", "description": "Sal models a word problem about baking cupcakes and muffins by creating a system of linear inequalities.", "slug": "creating-system-of-inequalities-word-problem"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/interpreting-system-of-inequalities-in-context/", "id": "ZTKAn9YNbNY", "title": "How to solve a word problem that uses a system of linear inequalities (example)", "kind": "Video", "description": "Sal is given a system of linear inequalities that models a context about making chairs and tables, and answers a question about the solution set of the system in terms of the context.", "slug": "interpreting-system-of-inequalities-in-context"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/graph-of-system-of-inequalities-word-problem/", "id": "C_7Tqk9fw4k", "title": "How to analyze the graph of a system of linear inequalities in terms of its context (example)", "kind": "Video", "description": "Sal is given the graph of a two-variable linear inequality that models a context about chopping vegetables. He analyzes the solution set of the system in terms of the context.", "slug": "graph-of-system-of-inequalities-word-problem"}, {"path": "khan/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities/modeling-systems-of-linear-inequalities/", "id": "modeling-systems-of-linear-inequalities", "title": "Systems of linear inequalities word problems", "description": "Solve word problems that involve systems of linear inequalities.", "slug": "modeling-systems-of-linear-inequalities", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to construct linear inequalities and systems of inequalities given a real-life context. Learn how to interpret such inequalities in terms of a real-life context, either algebraically or graphically.", "node_slug": "modeling-with-linear-inequalities", "render_type": "Tutorial", "topic_page_url": "/math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities", "extended_slug": "math/algebra/two-variable-linear-inequalities/modeling-with-linear-inequalities", "kind": "Topic", "slug": "modeling-with-linear-inequalities"}], "in_knowledge_map": false, "description": "In this topic, we study inequalities like x+2y>5 and graph them. This helps us see their solutions. We also explore systems of inequalities (multiple inequalities at the same time) and use them to describe real-world situations.", "node_slug": "two-variable-linear-inequalities", "render_type": "Topic", "topic_page_url": "/math/algebra/two-variable-linear-inequalities", "extended_slug": "math/algebra/two-variable-linear-inequalities", "kind": "Topic", "slug": "two-variable-linear-inequalities"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/", "id": "introduction-to-polynomials-and-factorization", "hide": false, "title": "Introduction to polynomials and quadratic factorization", "child_data": [{"kind": "Topic", "id": "xd5be8e1d"}, {"kind": "Topic", "id": "xcab7c9a7"}, {"kind": "Topic", "id": "x1483d936"}, {"kind": "Topic", "id": "xc3263dfc"}, {"kind": "Topic", "id": "xab602330"}, {"kind": "Topic", "id": "x52523fa2"}, {"kind": "Topic", "id": "xb751ee31"}, {"kind": "Topic", "id": "xfe54b3c5"}, {"kind": "Topic", "id": "x8abb53e6"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials/", "id": "introduction-to-polynomials", "hide": false, "title": "Introduction to polynomials", "child_data": [{"kind": "Video", "id": "13179510"}, {"kind": "Video", "id": "13179511"}, {"kind": "Video", "id": "8187332"}, {"kind": "Video", "id": "26919"}, {"kind": "Video", "id": "26974"}], "children": [{"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials/terms-coefficients-and-exponents-in-a-polynomial/", "id": "REiDXCN0lGU", "title": "The parts of polynomial expressions", "kind": "Video", "description": "Learn about terms, coefficients, and exponents. The basic ingredients of polynomial expressions!", "slug": "terms-coefficients-and-exponents-in-a-polynomial"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials/evaluating-a-polynomial-at-a-given-value/", "id": "03yq7XsErqo", "title": "Evaluating a polynomial at a given value", "kind": "Video", "description": "Evaluate 3x^2-8x+7 when x=-2", "slug": "evaluating-a-polynomial-at-a-given-value"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials/polynomials1/", "id": "EvvxBdNIUeQ", "title": "Example 1: Modeling with polynomials", "kind": "Video", "description": "Write a binomial to express the difference between the area of a rectangle and the area of a circle.", "slug": "polynomials1"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials/polynomials-2/", "id": "IGs7IB48Fvg", "title": "Example 2: Modeling with polynomials", "kind": "Video", "description": "Write a polynomial to express the total value of p twenty dollar bills, q ten dollar bills, and r five dollar bills.", "slug": "polynomials-2"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials/multiplying-polynomials-2/", "id": "J1HAY8E3gms", "title": "Example 3: Modeling with polynomials", "kind": "Video", "description": "Write a polynomial expression that represents the total area of a window made of wood and glass.", "slug": "multiplying-polynomials-2"}], "in_knowledge_map": false, "description": "Learn about polynomial expressions: What are they? How are they constructed? What can we do with them?", "node_slug": "introduction-to-polynomials", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials", "extended_slug": "math/algebra/introduction-to-polynomials-and-factorization/introduction-to-polynomials", "kind": "Topic", "slug": "introduction-to-polynomials"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/", "id": "adding-and-subtracting-polynomials", "hide": false, "title": "Adding and subtracting polynomials", "child_data": [{"kind": "Video", "id": "13179512"}, {"kind": "Video", "id": "26920"}, {"kind": "Video", "id": "13179515"}, {"kind": "Video", "id": "26922"}, {"kind": "Exercise", "id": "357414238"}, {"kind": "Video", "id": "1159107679"}, {"kind": "Video", "id": "13179529"}, {"kind": "Exercise", "id": "xa157ae82"}, {"kind": "Video", "id": "23702"}], "children": [{"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/simply-a-polynomial/", "id": "vN0aL-_vIKM", "title": "How to simplify a polynomial by combining like terms (example)", "kind": "Video", "description": "Sal simplifies 3x^2 - 8x + 7 + 2x^3 - x^2 + 8x - 3.", "slug": "simply-a-polynomial"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/adding-and-subtracting-polynomials-1/", "id": "ahdKdxsTj8E", "title": "How to add two polynomials (example)", "kind": "Video", "description": "Sal simplifies (5x^2 + 8x - 3) + (2x^2 - 7x + 13x).", "slug": "adding-and-subtracting-polynomials-1"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/subtracting-polynomials/", "id": "5ZdxnFspyP8", "title": "How to subtract one polynomial from another (example)", "kind": "Video", "description": "Sal simplifies (16x+14) - (3x^2 + x - 9).", "slug": "subtracting-polynomials"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/adding-and-subtracting-polynomials-3/", "id": "DMyhUb1pZT0", "title": "How to add and subtract multiple polynomials (example)", "kind": "Video", "description": "Sal simplifies (x^3 + 3x - 6) + (-2x^2 + x - 2) - (3x - 4).", "slug": "adding-and-subtracting-polynomials-3"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/adding_and_subtracting_polynomials/", "id": "adding_and_subtracting_polynomials", "title": "Add and subtract polynomials with one variable", "description": "Practice the addition and subtraction of polynomial expressions with a single variable", "slug": "adding_and_subtracting_polynomials", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/example-adding-polynomials-with-multiple-variables/", "id": "jroamh6SIo0", "title": "How to add polynomials with two variables (example)", "kind": "Video", "description": "Sal simplifies (4x^2y - 3x^2 - 2y) + (8xy - 3x^2 + 2x^2y + 4).", "slug": "example-adding-polynomials-with-multiple-variables"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/subtracting-polynomials-with-multiple-variables/", "id": "AqMT_zB9rP8", "title": "How to subtract polynomials with two variables (example)", "kind": "Video", "description": "Sal simplifies (4x^2y - 3xy + 25) - (9y^2x + 7xy - 20).", "slug": "subtracting-polynomials-with-multiple-variables"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/adding-and-subtracting-polynomials-2/", "id": "adding-and-subtracting-polynomials-2", "title": "Add and subtract polynomials with two variables", "description": "Add and subtract polynomial expressions with two variables", "slug": "adding-and-subtracting-polynomials-2", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials/addition-and-subtraction-of-polynomials/", "id": "ZgFXL6SEUiI", "title": "More examples of addition and subtraction of polynomials", "kind": "Video", "description": "If you can't get enough of Sal adding and subtracting polynomials, here's a bunch of many more examples.", "slug": "addition-and-subtraction-of-polynomials"}], "in_knowledge_map": false, "description": "Learn how to add and subtract polynomial expressions with one or two variables.", "node_slug": "adding-and-subtracting-polynomials", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials", "extended_slug": "math/algebra/introduction-to-polynomials-and-factorization/adding-and-subtracting-polynomials", "kind": "Topic", "slug": "adding-and-subtracting-polynomials"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-monomials/", "id": "multiplying-polynomials-by-monomials", "hide": false, "title": "Multiplying a polynomial by a monomial", "child_data": [{"kind": "Video", "id": "13179516"}, {"kind": "Video", "id": "26915"}, {"kind": "Exercise", "id": "x6560dbc7"}, {"kind": "Video", "id": "13179517"}, {"kind": "Exercise", "id": "x17f3a960"}], "children": [{"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-monomials/multiplying-monomials/", "id": "ssY1dFl7d30", "title": "How to multiply monomials with one variable (example)", "kind": "Video", "description": "Sal expresses the area of a rectangle with length 4y and width 2y as a monomial.", "slug": "multiplying-monomials"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-monomials/multiplying-and-dividing-monomials-1/", "id": "p_61XhXdlxI", "title": "How to multiply monomials with two variables (example)", "kind": "Video", "description": "Sal expresses the area of a rectangle with length 4xy and width 2y as a monomial.", "slug": "multiplying-and-dividing-monomials-1"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-monomials/finding-the-product-of-two-monomials/", "id": "finding-the-product-of-two-monomials", "title": "Multiply monomials by monomials", "description": "Express the product of two monomial expressions as a single monomial", "slug": "finding-the-product-of-two-monomials", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-monomials/multiplying-monomials-by-polynomials/", "id": "pD2-H15ucNE", "title": "How to multiply a monomial by a polynomial (example)", "kind": "Video", "description": "Sal multiplies -4x^2 by (3x^2 + 25x - 7).", "slug": "multiplying-monomials-by-polynomials"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-monomials/finding-the-product-of-a-monomial-and-a-polynomial/", "id": "finding-the-product-of-a-monomial-and-a-polynomial", "title": "Multiply monomials by polynomials", "description": "Use the distributive property to express the product of a monomial and a polynomial as a single polynomial.", "slug": "finding-the-product-of-a-monomial-and-a-polynomial", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to multiply a polynomial expression by a monomial expression. Monomials are just polynomials with a single term!", "node_slug": "multiplying-polynomials-by-monomials", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-monomials", "extended_slug": "math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-monomials", "kind": "Topic", "slug": "multiplying-polynomials-by-monomials"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-binomials/", "id": "multiplying-polynomials-by-binomials", "hide": false, "title": "Multiplying a polynomial by a binomial", "child_data": [{"kind": "Video", "id": "13179518"}, {"kind": "Exercise", "id": "617857186"}, {"kind": "Video", "id": "13179530"}, {"kind": "Video", "id": "26975"}, {"kind": "Exercise", "id": "357437094"}], "children": [{"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-binomials/multiplying-binomials/", "id": "ZMLFfTX615w", "title": "How to multiply a binomial by a binomial (example)", "kind": "Video", "description": "Sal multiplies (3x+2) by (5x-7).", "slug": "multiplying-binomials"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-binomials/multiplying_expressions_05/", "id": "multiplying_expressions_0.5", "title": "Multiply binomials by binomials", "description": "Use the distributive property to express the product of two binomials as a single polynomial.", "slug": "multiplying_expressions_05", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-binomials/more-multiplying-polynomials/", "id": "D6mivA_8L8U", "title": "How to multiply a binomial by a polynomial (example)", "kind": "Video", "description": "Sal multiplies (10a-3) by (5a^2 + 7a - 1).", "slug": "more-multiplying-polynomials"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-binomials/multiplying-polynomials-3/", "id": "bamcYQDzVTw", "title": "How to solve a word problem with polynomial multiplication (example)", "kind": "Video", "description": "Sal finds the volume of a tank whose base has an area of 3x^2 + 30x + 5 square feet and whose height is 8x - 5 feet.", "slug": "multiplying-polynomials-3"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-binomials/multiplying_polynomials/", "id": "multiplying_polynomials", "title": "Multiply binomials by polynomials", "description": "Use the distributive property to express the product of a binomial and a polynomial as a single polynomial.", "slug": "multiplying_polynomials", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to multiply a polynomial expression by a binomial expression. Binomials are just polynomials with exactly two terms!", "node_slug": "multiplying-polynomials-by-binomials", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-binomials", "extended_slug": "math/algebra/introduction-to-polynomials-and-factorization/multiplying-polynomials-by-binomials", "kind": "Topic", "slug": "multiplying-polynomials-by-binomials"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/special-products-of-polynomials/", "id": "special-products-of-polynomials", "hide": false, "title": "Special products of polynomials", "child_data": [{"kind": "Video", "id": "23706"}, {"kind": "Video", "id": "13179520"}, {"kind": "Video", "id": "13179521"}, {"kind": "Exercise", "id": "3023"}, {"kind": "Video", "id": "8187338"}, {"kind": "Exercise", "id": "x0597eb78"}], "children": [{"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/special-products-of-polynomials/special-products-of-binomials/", "id": "bFtjG45-Udk", "title": "Introduction to special products of binomials", "kind": "Video", "description": "Sal gives numerous examples of the two special product forms: perfect squares and the difference of two squares.", "slug": "special-products-of-binomials"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/special-products-of-polynomials/special-polynomials-products-1/", "id": "h6HmHjkA034", "title": "How to multiply binomials to get a difference of squares (example)", "kind": "Video", "description": "Sal multiplies (2x+8) by (2x-8) and discovers an interesting phenomenon.", "slug": "special-polynomials-products-1"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/special-products-of-polynomials/square-a-binomial/", "id": "xjkbR7Gjgjs", "title": "How to find the square of a binomial with one variable (example)", "kind": "Video", "description": "Sal multiplies (7x+10) by (7x+10), which is also known as\u00a0(7x+10)^2.", "slug": "square-a-binomial"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/special-products-of-polynomials/multiplying_expressions_1/", "id": "multiplying_expressions_1", "title": "Find special products of binomials (basic)", "description": "Find perfect squares of the forms (x+a)^2 and (x-a)^2, and differences of squares of the form (x+a)(x-a).", "slug": "multiplying_expressions_1", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/special-products-of-polynomials/special-products-of-polynomials-2/", "id": "4fQeHtSdw80", "title": "How to find the square of a binomial with two variables (example)", "kind": "Video", "description": "Sal finds the area of a square with side (6x-5y).", "slug": "special-products-of-polynomials-2"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/special-products-of-polynomials/finding-special-products/", "id": "finding-special-products", "title": "Find special products of binomials (advanced)", "description": "Find special products (perfect squares and difference of squares) of \"advanced\" binomials: binomials with leading coefficients other than 1; binomials with higher degrees; and binomials with two variables.", "slug": "finding-special-products", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn about the special types of products of polynomials: perfect squares and the difference of two squares. These will be very helpful once you tackle more advanced expressions in Algebra.", "node_slug": "special-products-of-polynomials", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-polynomials-and-factorization/special-products-of-polynomials", "extended_slug": "math/algebra/introduction-to-polynomials-and-factorization/special-products-of-polynomials", "kind": "Topic", "slug": "special-products-of-polynomials"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-factorization/", "id": "introduction-to-factorization", "hide": false, "title": "Introduction to factorization", "child_data": [{"kind": "Exercise", "id": "xd03bd6f3"}, {"kind": "Exercise", "id": "x4c9501c4"}, {"kind": "Video", "id": "13179576"}, {"kind": "Exercise", "id": "2018"}], "children": [{"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-factorization/factors-and-divisibility/", "id": "factors-and-divisibility", "title": "Factors and divisibility", "description": "Practice the relationship between products and their factors (spoiler: a product is divisible by its factors)", "slug": "factors-and-divisibility", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-factorization/factoring-monomials/", "id": "factoring-monomials", "title": "Factoring monomials", "description": "Factor monomials as products of smaller monomials.", "slug": "factoring-monomials", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-factorization/monomial-greatest-common-factor/", "id": "_01wqwsb66E", "title": "How to find the greatest common factor of two monomials (example)", "kind": "Video", "description": "Sal finds the greatest common factor of 10cd^2 and 25c^3d^2.", "slug": "monomial-greatest-common-factor"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-factorization/greatest_common_divisor/", "id": "greatest_common_divisor", "title": "Greatest common factor", "slug": "greatest_common_divisor", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn what factorization is all about, and warm-up by factoring some monomials.", "node_slug": "introduction-to-factorization", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-polynomials-and-factorization/introduction-to-factorization", "extended_slug": "math/algebra/introduction-to-polynomials-and-factorization/introduction-to-factorization", "kind": "Topic", "slug": "introduction-to-factorization"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-1-common-factors/", "id": "factoring-polynomials-1-common-factors", "hide": false, "title": "Factoring polynomials 1 - Common factors", "child_data": [{"kind": "Video", "id": "xa1e260c1"}, {"kind": "Video", "id": "26981"}, {"kind": "Video", "id": "13179577"}, {"kind": "Video", "id": "26982"}, {"kind": "Exercise", "id": "x6509b8bd"}], "children": [{"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-1-common-factors/factoring-linear-binomials/", "id": "mbb3msmX2xs", "title": "How to factor a linear binomial by taking out a common factor (example)", "kind": "Video", "description": "Sal shows how to factor the expression 4x+18 into the expression 2(2x+9).", "slug": "factoring-linear-binomials"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-1-common-factors/factoring-and-the-distributive-property-2/", "id": "499MvHFrqUU", "title": "How to factor a quadratic binomial with two variables by taking a common factor (example)", "kind": "Video", "description": "Sal factors 20u^2v - 10uv^2 as 10uv(2u-v).", "slug": "factoring-and-the-distributive-property-2"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-1-common-factors/factoring-and-the-distributive-property-3/", "id": "MZl6Mna0leQ", "title": "How to factor a polynomial with two variables by taking a common factor (example)", "kind": "Video", "description": "Sal factors 4x^4y-8x^3y-2x^2 as 2x^2(2x^2y-4xy).", "slug": "factoring-and-the-distributive-property-3"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-1-common-factors/factoring-polynomials/", "id": "factoring-polynomials", "title": "Factor polynomials by taking a common factor", "description": "Practice finding the greatest common factors of polynomials and factoring them out of the polynomials.", "slug": "factoring-polynomials", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to take a common monomial factor out of a polynomial expression.", "node_slug": "factoring-polynomials-1-common-factors", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-1-common-factors", "extended_slug": "math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-1-common-factors", "kind": "Topic", "slug": "factoring-polynomials-1-common-factors"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/", "id": "factoring-polynomials-2-quadratic-forms", "hide": false, "title": "Factoring polynomials 2 - Quadratic forms", "child_data": [{"kind": "Video", "id": "1228073357"}, {"kind": "Video", "id": "23710"}, {"kind": "Exercise", "id": "541466377"}, {"kind": "Video", "id": "13179579"}, {"kind": "Video", "id": "26986"}, {"kind": "Video", "id": "23714"}, {"kind": "Exercise", "id": "729514670"}, {"kind": "Video", "id": "26987"}, {"kind": "Video", "id": "26988"}, {"kind": "Exercise", "id": "688726305"}, {"kind": "Video", "id": "xd24800c6"}, {"kind": "Video", "id": "x97900f0f"}, {"kind": "Video", "id": "26983"}, {"kind": "Exercise", "id": "688778053"}], "children": [{"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-polynomials-1/", "id": "1kfq0aR3ASs", "title": "How to factor quadratics with a leading coefficient of 1 (example)", "kind": "Video", "description": "Sal factors x^2-14x+40 as (x-4)(x-1) and x^2-x-12 as (x+3)(x-4).", "slug": "factoring-polynomials-1"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-quadratic-expressions/", "id": "eF6zYNzlZKQ", "title": "More examples of factoring quadratics with a leading coefficient of 1", "kind": "Video", "description": "Can't get enough of Sal factoring simple quadratics? Here's a handful of examples just for you!", "slug": "factoring-quadratic-expressions"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring_polynomials_1/", "id": "factoring_polynomials_1", "title": "Factor quadratics with a leading coefficient of 1", "description": "Use the \"sum-product\" form to factor quadratics of the form x^2+bx+c.", "slug": "factoring_polynomials_1", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-trinomials-with-a-leading-1-coefficient/", "id": "nOZTe8jU2g4", "title": "Introduction to grouping", "kind": "Video", "description": "Sal factors t^2+8t+15 as (t+3)(t+5), first using the \"sum-product\" method, then using the grouping method.", "slug": "factoring-trinomials-with-a-leading-1-coefficient"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-trinomials-by-grouping-4/", "id": "u1SAo2GiX8A", "title": "How to factor quadratics by grouping (example)", "kind": "Video", "description": "Sal factors 4y^2+4y-15 as (2y-3)(2y+5) by grouping.", "slug": "factoring-trinomials-by-grouping-4"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factor-by-grouping-and-factoring-completely/", "id": "X7B_tH4O-_s", "title": "More examples of factoring by grouping", "kind": "Video", "description": "Can't get enough of Sal factoring quadratics by grouping? Here's a handful of examples just for you!", "slug": "factor-by-grouping-and-factoring-completely"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring_polynomials_by_grouping_1/", "id": "factoring_polynomials_by_grouping_1", "title": "Factor quadratics with a leading coefficient other than 1", "description": "Use the grouping method to factor quadratics of the form ax^2+bx+c.", "slug": "factoring_polynomials_by_grouping_1", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-trinomials-by-grouping-5/", "id": "R-rhSQzFJL0", "title": "How to factor quadratics by taking a common factor and grouping (example)", "kind": "Video", "description": "Sal factors 35k^2+100k-15 as 5(k+3)(7k-1).", "slug": "factoring-trinomials-by-grouping-5"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-trinomials-by-grouping-6/", "id": "d-2Lcp0QKfI", "title": "How to factor quadratics by taking a negative common factor and grouping (example)", "kind": "Video", "description": "Sal factors -12f^2-38f+22 as -2(2f-1)(3f+11).", "slug": "factoring-trinomials-by-grouping-6"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring_polynomials_2/", "id": "factoring_polynomials_2", "title": "Factor polynomials using quadratic methods", "description": "Factor polynomials that can be factored as the product of a monomial and a quadratic expression, then further factor the quadratic expression.", "slug": "factoring_polynomials_2", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-quadratics-with-two-variables/", "id": "DRpdoZQtvOM", "title": "How to factor quadratics with two variables with leading coefficient 1 (example)", "kind": "Video", "description": "Sal factors x^2+4xy-5y^2 as (x-y)(x+5y).", "slug": "factoring-quadratics-with-two-variables"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-quadratics-with-two-variables-example/", "id": "0xrvRKHoO2g", "title": "How to factor quadratics with two variables with rearranging (example)", "kind": "Video", "description": "Sal rearranges 30x^2+11xy+y^2 as y^2+11xy+30x^2 and then factors it as (y+5x)(y+6x).", "slug": "factoring-quadratics-with-two-variables-example"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring-trinomials-by-grouping-1/", "id": "HXIj16mjfgk", "title": "How to factor a polynomial with two variables by grouping (example)", "kind": "Video", "description": "Sal factors 5rs+25r-3s-15 as (s+5)(5r-3).", "slug": "factoring-trinomials-by-grouping-1"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms/factoring_polynomials_with_two_variables/", "id": "factoring_polynomials_with_two_variables", "title": "Factor polynomials with quadratic forms", "description": "Factor \"advanced\" polynomials (i.e. polynomials of various degrees and or with two variables) using quadratic factorization methods.", "slug": "factoring_polynomials_with_two_variables", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to factor quadratic polynomials of the form ax^2+bx+c as the product of two linear binomials. Learn how to identify these forms in more elaborate polynomials that aren't necessarily quadratic.", "node_slug": "factoring-polynomials-2-quadratic-forms", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms", "extended_slug": "math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-2-quadratic-forms", "kind": "Topic", "slug": "factoring-polynomials-2-quadratic-forms"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/", "id": "factoring-polynomials-3-special-product-forms", "hide": false, "title": "Factoring polynomials 3 - Special product forms", "child_data": [{"kind": "Exercise", "id": "541518385"}, {"kind": "Video", "id": "13179583"}, {"kind": "Video", "id": "x828e9a9a"}, {"kind": "Exercise", "id": "541433013"}, {"kind": "Video", "id": "26989"}, {"kind": "Video", "id": "13179582"}, {"kind": "Exercise", "id": "xefab7fff"}, {"kind": "Video", "id": "26990"}, {"kind": "Video", "id": "26991"}, {"kind": "Exercise", "id": "725546801"}], "children": [{"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/factoring_difference_of_squares_1/", "id": "factoring_difference_of_squares_1", "title": "Factor simple special products", "description": "Factor quadratic expressions into the special products of the general forms (x+a)^2, (x-a)^2, and (x+a)(x-a).", "slug": "factoring_difference_of_squares_1", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/factoring-difference-of-squares/", "id": "tvnOWIoeeaU", "title": "How to factor a difference of squares with two variables (example)", "kind": "Video", "description": "Sal factors x^2-49y^2 as (x+7y)(x-7y).", "slug": "factoring-difference-of-squares"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/factoring-to-produce-difference-of-squares/", "id": "jmbg-DKWuc4", "title": "How to factor a difference of squares with leading coefficient other than 1 (example)", "kind": "Video", "description": "Sal factors 45x^2-125 as 5(3x+5)(3x-5).", "slug": "factoring-to-produce-difference-of-squares"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/factoring_difference_of_squares_2/", "id": "factoring_difference_of_squares_2", "title": "Factor differences of squares", "description": "Factor quadratic expressions of the general difference of squares form: (ax)^2-b^2. The factored expressions have the general form (ax+b)(ax-b).", "slug": "factoring_difference_of_squares_2", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/u09-l2-t1-we1-factoring-special-products-1/", "id": "XuwldEyWjH0", "title": "How to factor quadratics as a perfect square of a sum: (a+b)^2 (example)", "kind": "Video", "description": "Sal factors -4t^2-12t-9 as -1(2t+3)(2t+3), or -(2t+3)^2.", "slug": "u09-l2-t1-we1-factoring-special-products-1"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/factoring-perfect-square-trinomials/", "id": "liRNTieIU_k", "title": "How to factor quadratics as a perfect square of a difference: (a-b)^2 (example)", "kind": "Video", "description": "Sal factors 25x^2-30x+9 as (5x-3)^2 or as (-5x+3)^2.", "slug": "factoring-perfect-square-trinomials"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/factoring-perfect-squares/", "id": "factoring-perfect-squares", "title": "Factor perfect squares", "description": "Factor quadratic expressions of the general perfect square forms: (ax)^2+2abx+b^2 or (ax)^2-2abx+b^2. The factored expressions have the general forms (ax+b)^2 or (ax=b)^2.", "slug": "factoring-perfect-squares", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/factoring-special-products-2/", "id": "o-ZbdYVGehI", "title": "How to factor a fourth degree polynomial using the \"perfect square\" form (example)", "kind": "Video", "description": "Sal factors 25x^4-30x^2+9 as (5x^2-3)^2.", "slug": "factoring-special-products-2"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/u09-l2-t1-we3-factoring-special-products-3/", "id": "YahJQvY396o", "title": "How to factor a difference of squares with two variables (example)", "kind": "Video", "description": "Sal factors 49x^2-49y^2 as (7x+7y)(7x-7y) or as 49(x+y)(x-y).", "slug": "u09-l2-t1-we3-factoring-special-products-3"}, {"path": "khan/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms/factoring_difference_of_squares_3/", "id": "factoring_difference_of_squares_3", "title": "Factor polynomials with special product forms", "description": "Factor \"advanced\" polynomials (i.e. polynomials of various degrees and or with two variables) using special product factorization methods.", "slug": "factoring_difference_of_squares_3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to factor quadratics that have the \"perfect square\" form and the \"difference of squares\" form. Learn how to identify these forms in more elaborate polynomials that aren't necessarily quadratic.", "node_slug": "factoring-polynomials-3-special-product-forms", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms", "extended_slug": "math/algebra/introduction-to-polynomials-and-factorization/factoring-polynomials-3-special-product-forms", "kind": "Topic", "slug": "factoring-polynomials-3-special-product-forms"}], "in_knowledge_map": false, "description": "Learn how to add, subtract, multiply, and factor polynomial expressions.", "node_slug": "introduction-to-polynomials-and-factorization", "render_type": "Topic", "topic_page_url": "/math/algebra/introduction-to-polynomials-and-factorization", "extended_slug": "math/algebra/introduction-to-polynomials-and-factorization", "kind": "Topic", "slug": "introduction-to-polynomials-and-factorization"}, {"icon_src": "/images/power-mode/badges/quadratics-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra/quadratics/", "id": "quadratics", "hide": false, "title": "Quadratic equations", "child_data": [{"kind": "Topic", "id": "x6a2f6c28"}, {"kind": "Topic", "id": "xaff92c6c"}, {"kind": "Topic", "id": "x8257058f"}, {"kind": "Topic", "id": "x40bf111d"}, {"kind": "Topic", "id": "xb9d7cf57"}, {"kind": "Topic", "id": "xf44db6ed"}, {"kind": "Topic", "id": "xf00f5342"}, {"kind": "Topic", "id": "x1dff035b"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/quadratics/quadratics-square-root/", "id": "quadratics-square-root", "hide": false, "title": "Solving quadratics by taking square root", "child_data": [{"kind": "Video", "id": "23720"}, {"kind": "Video", "id": "150088074"}, {"kind": "Exercise", "id": "617819647"}, {"kind": "Video", "id": "x947b1dd9"}, {"kind": "Video", "id": "xf7eacd77"}, {"kind": "Exercise", "id": "xee0c0511"}], "children": [{"path": "khan/math/algebra/quadratics/quadratics-square-root/solving-quadratic-equations-by-square-roots/", "id": "55G8037gsKY", "title": "Solving quadratic equations by square roots", "kind": "Video", "description": "Solving Quadratic Equations by Square Roots", "slug": "solving-quadratic-equations-by-square-roots"}, {"path": "khan/math/algebra/quadratics/quadratics-square-root/simple-quadratic-equation/", "id": "RweAgQwLdMs", "title": "Example: Solving simple quadratic", "kind": "Video", "description": "Simple Quadratic Equation", "slug": "simple-quadratic-equation"}, {"path": "khan/math/algebra/quadratics/quadratics-square-root/solving_quadratics_by_taking_the_square_root/", "id": "solving_quadratics_by_taking_the_square_root", "title": "Solving quadratics by taking the square root", "description": "Solve quadratics by taking the square root.", "slug": "solving_quadratics_by_taking_the_square_root", "kind": "Exercise"}, {"path": "khan/math/algebra/quadratics/quadratics-square-root/order-of-steps-exercise-example/", "id": "naVFTNWVlQU", "title": "Order of steps exercise example", "kind": "Video", "slug": "order-of-steps-exercise-example"}, {"path": "khan/math/algebra/quadratics/quadratics-square-root/determining-mistakes-in-steps-example/", "id": "jtPvDycHVQw", "title": "Determining mistakes in steps example", "kind": "Video", "slug": "determining-mistakes-in-steps-example"}, {"path": "khan/math/algebra/quadratics/quadratics-square-root/understanding-the-equation-solving-process/", "id": "understanding-the-equation-solving-process", "title": "Understanding the process for solving quadratic equations", "slug": "understanding-the-equation-solving-process", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's explore one of the most fundamental ways to solve a quadratic equation when it is already written in terms of a square of an expression in x--solve for the expression and take the square root. As we'll see, equations are not always in this form, and that is where completing the square--which puts equations in this form--is essential!", "node_slug": "quadratics-square-root", "render_type": "Tutorial", "topic_page_url": "/math/algebra/quadratics/quadratics-square-root", "extended_slug": "math/algebra/quadratics/quadratics-square-root", "kind": "Topic", "slug": "quadratics-square-root"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/quadratics/factoring-quadratics/", "id": "factoring-quadratics", "hide": false, "title": "Solving quadratics by factoring", "child_data": [{"kind": "Video", "id": "23710"}, {"kind": "Video", "id": "26992"}, {"kind": "Video", "id": "13179588"}, {"kind": "Exercise", "id": "3024"}, {"kind": "Video", "id": "26994"}, {"kind": "Exercise", "id": "541520116"}], "children": [{"path": "khan/math/algebra/quadratics/factoring-quadratics/factoring-quadratic-expressions/", "id": "eF6zYNzlZKQ", "title": "More examples of factoring quadratics with a leading coefficient of 1", "kind": "Video", "description": "Can't get enough of Sal factoring simple quadratics? Here's a handful of examples just for you!", "slug": "factoring-quadratic-expressions"}, {"path": "khan/math/algebra/quadratics/factoring-quadratics/example-1-solving-a-quadratic-equation-by-factoring/", "id": "2ZzuZvz33X0", "title": "Solving a quadratic equation by factoring", "kind": "Video", "description": "U09_L2_T2_we1 Solving Quadratic Equations by Factoring.avi", "slug": "example-1-solving-a-quadratic-equation-by-factoring"}, {"path": "khan/math/algebra/quadratics/factoring-quadratics/example-4-solving-a-quadratic-equation-by-factoring/", "id": "STcsaKuW-24", "title": "Finding dimensions of triangle from area", "kind": "Video", "description": "Applications Problem Factoring Quadratics", "slug": "example-4-solving-a-quadratic-equation-by-factoring"}, {"path": "khan/math/algebra/quadratics/factoring-quadratics/solving_quadratics_by_factoring/", "id": "solving_quadratics_by_factoring", "title": "Solving quadratics by factoring", "description": "Factor quadratics to find the x-intercepts. Solve a polynomial by factoring.", "slug": "solving_quadratics_by_factoring", "kind": "Exercise"}, {"path": "khan/math/algebra/quadratics/factoring-quadratics/example-3-solving-a-quadratic-equation-by-factoring/", "id": "vl9o9XEfXtw", "title": "Dimensions from volume of box", "kind": "Video", "description": "U09_L2_T2_we3 Solving Quadratic Equations by Factoring 3", "slug": "example-3-solving-a-quadratic-equation-by-factoring"}, {"path": "khan/math/algebra/quadratics/factoring-quadratics/solving_quadratics_by_factoring_2/", "id": "solving_quadratics_by_factoring_2", "title": "Solving quadratics by factoring 2", "description": "Solve quadratics by factoring, where the leading coefficient\u00a0is not 1", "slug": "solving_quadratics_by_factoring_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Just saying the word \"quadratic\" will make you feel smart and powerful. Try it. Imagine how smart and powerful you would actually be if you know what a quadratic is. Even better, imagine being able to completely dominate these \"quadratics\" with new found powers of factorization. Well, dream no longer.\n\nThis tutorial will be super fun. Just bring to it your equation solving skills, your ability to multiply binomials and a non-linear way of thinking!", "node_slug": "factoring-quadratics", "render_type": "Tutorial", "topic_page_url": "/math/algebra/quadratics/factoring-quadratics", "extended_slug": "math/algebra/quadratics/factoring-quadratics", "kind": "Topic", "slug": "factoring-quadratics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/quadratics/completing_the_square/", "id": "completing_the_square", "hide": false, "title": "Completing the square", "child_data": [{"kind": "Video", "id": "23722"}, {"kind": "Video", "id": "26998"}, {"kind": "Video", "id": "26999"}, {"kind": "Video", "id": "150088071"}, {"kind": "Exercise", "id": "x7f7826ab"}, {"kind": "Exercise", "id": "369016246"}, {"kind": "Exercise", "id": "369017708"}, {"kind": "Video", "id": "27001"}], "children": [{"path": "khan/math/algebra/quadratics/completing_the_square/solving-quadratic-equations-by-completing-the-square/", "id": "bNQY0z76M5A", "title": "Solving quadratic equations by completing the square", "kind": "Video", "description": "Solving Quadratic Equations by Completing the Square", "slug": "solving-quadratic-equations-by-completing-the-square"}, {"path": "khan/math/algebra/quadratics/completing_the_square/ex1-completing-the-square/", "id": "VvuuRpJbbHE", "title": "Example 1: Completing the square", "kind": "Video", "description": "U10_L1_T2_we1 Completing the Square 1", "slug": "ex1-completing-the-square"}, {"path": "khan/math/algebra/quadratics/completing_the_square/ex2-completing-the-square/", "id": "6agzj3A9IgA", "title": "Example 2: Completing the square", "kind": "Video", "description": "U10_L1_T2_we2 Completing the Square 2", "slug": "ex2-completing-the-square"}, {"path": "khan/math/algebra/quadratics/completing_the_square/completing-the-square-to-solve-quadratic-equations/", "id": "TV5kDqiJ1Os", "title": "Example 3: Completing the square", "kind": "Video", "description": "Completing the Square to Solve Quadratic Equations", "slug": "completing-the-square-to-solve-quadratic-equations"}, {"path": "khan/math/algebra/quadratics/completing_the_square/completing_the_square_in_quadratic_expressions/", "id": "completing_the_square_in_quadratic_expressions", "title": "Completing the square in quadratic expressions", "slug": "completing_the_square_in_quadratic_expressions", "kind": "Exercise"}, {"path": "khan/math/algebra/quadratics/completing_the_square/completing_the_square_1/", "id": "completing_the_square_1", "title": "Solving quadratics by completing the square 1", "description": "Find the roots of a quadratic equation by completing the square.", "slug": "completing_the_square_1", "kind": "Exercise"}, {"path": "khan/math/algebra/quadratics/completing_the_square/completing_the_square_2/", "id": "completing_the_square_2", "title": "Solving quadratics by completing the square 2", "description": "Find the roots of a quadratic by completing the square. The numbers are a bit less convenient than they are in level 1.", "slug": "completing_the_square_2", "kind": "Exercise"}, {"path": "khan/math/algebra/quadratics/completing_the_square/completing-the-square-4/", "id": "95tChNVzodY", "title": "Completing the square for quadratic formula", "kind": "Video", "description": "Completing the Square 4", "slug": "completing-the-square-4"}], "in_knowledge_map": false, "description": "You're already familiar with factoring quadratics, but have begun to realize that it only is useful in certain cases. Well, this tutorial will introduce you to something far more powerful and general. Even better, it is the bridge to understanding and proving the famous quadratic formula.\n\nWelcome to the world of completing the square!", "node_slug": "completing_the_square", "render_type": "Tutorial", "topic_page_url": "/math/algebra/quadratics/completing_the_square", "extended_slug": "math/algebra/quadratics/completing_the_square", "kind": "Topic", "slug": "completing_the_square"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/quadratics/quadratic-formula/", "id": "quadratic-formula", "hide": false, "title": "The quadratic formula (quadratic equation)", "child_data": [{"kind": "Video", "id": "23724"}, {"kind": "Article", "id": "x1a0cf771"}, {"kind": "Video", "id": "150088075"}, {"kind": "Video", "id": "23726"}, {"kind": "Video", "id": "27002"}, {"kind": "Video", "id": "27003"}, {"kind": "Video", "id": "27004"}, {"kind": "Video", "id": "150009952"}, {"kind": "Video", "id": "150088073"}, {"kind": "Exercise", "id": "2020"}], "children": [{"path": "khan/math/algebra/quadratics/quadratic-formula/using-the-quadratic-formula/", "id": "i7idZfS8t8w", "title": "How to use the quadratic formula", "kind": "Video", "description": "Introduction to using the quadratic formula.", "slug": "using-the-quadratic-formula"}, {"path": "khan/math/algebra/quadratics/quadratic-formula/quadratic-equations-in-standard-form/", "id": "ty4Ohya4hdE", "title": "Example: Quadratics in standard form", "kind": "Video", "description": "Quadratic Equations in Standard Form", "slug": "quadratic-equations-in-standard-form"}, {"path": "khan/math/algebra/quadratics/quadratic-formula/proof-of-quadratic-formula/", "id": "r3SEkdtpobo", "title": "Proof of quadratic formula", "kind": "Video", "description": "Proof of Quadratic Formula", "slug": "proof-of-quadratic-formula"}, {"path": "khan/math/algebra/quadratics/quadratic-formula/quadratic-formula-1/", "id": "iulx0z1lz8M", "title": "Example 1: Using the quadratic formula", "kind": "Video", "description": "Quadratic Formula 1", "slug": "quadratic-formula-1"}, {"path": "khan/math/algebra/quadratics/quadratic-formula/quadratic-formula-2/", "id": "CLrImGKeuEI", "title": "Example 2: Using the quadratic formula", "kind": "Video", "description": "Quadratic Formula 2", "slug": "quadratic-formula-2"}, {"path": "khan/math/algebra/quadratics/quadratic-formula/quadratic-formula-3/", "id": "XUvKjC21fYU", "title": "Example 3: Using the quadratic formula", "kind": "Video", "description": "Quadratic Formula 3", "slug": "quadratic-formula-3"}, {"path": "khan/math/algebra/quadratics/quadratic-formula/application-problem-with-quadratic-formula/", "id": "OZtqz_xw0SQ", "title": "Example 4: Applying the quadratic formula", "kind": "Video", "description": "Application Problem with Quadratic Formula", "slug": "application-problem-with-quadratic-formula"}, {"path": "khan/math/algebra/quadratics/quadratic-formula/applying-the-quadratic-formula/", "id": "_E3gx_yQhHQ", "title": "Example 5: Using the quadratic formula", "kind": "Video", "description": "Applying the Quadratic Formula", "slug": "applying-the-quadratic-formula"}, {"path": "khan/math/algebra/quadratics/quadratic-formula/quadratic_equation/", "id": "quadratic_equation", "title": "Using the quadratic formula", "description": "Use the quadratic formula to find the roots of a quadratic function.", "slug": "quadratic_equation", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Probably one of the most famous tools in mathematics, the quadratic formula (a.k.a. quadratic equation) helps you think about the roots of ANY quadratic (even ones that have no real roots)! As you'll see, it is just the by-product of completing the square, but understanding and applying the formula will take your algebra skills to new heights.\n\nIn theory, one could apply the quadratic formula in a brainless way without understanding factoring or completing the square, but that's lame and uninteresting. We recommend coming to this tutorial with a solid background in both of those techniques. Have fun!", "node_slug": "quadratic-formula", "render_type": "Tutorial", "topic_page_url": "/math/algebra/quadratics/quadratic-formula", "extended_slug": "math/algebra/quadratics/quadratic-formula", "kind": "Topic", "slug": "quadratic-formula"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/quadratics/features-of-quadratic-functions/", "id": "features-of-quadratic-functions", "hide": false, "title": "Features of quadratic functions", "child_data": [{"kind": "Video", "id": "27000"}, {"kind": "Video", "id": "x96c7edd8"}, {"kind": "Exercise", "id": "x9d774d82"}, {"kind": "Video", "id": "xb32f484b"}, {"kind": "Exercise", "id": "x2df52758"}], "children": [{"path": "khan/math/algebra/quadratics/features-of-quadratic-functions/ex3-completing-the-square/", "id": "02h9yhc7ruc", "title": "Completing the square for vertex form", "kind": "Video", "description": "U10_L1_T2_we3 Completing the Square 3", "slug": "ex3-completing-the-square"}, {"path": "khan/math/algebra/quadratics/features-of-quadratic-functions/rewriting-a-quadratic-function-to-find-roots-and-vertex/", "id": "4Bc5-HRop5Y", "title": "Rewriting a quadratic function to find roots and vertex", "kind": "Video", "slug": "rewriting-a-quadratic-function-to-find-roots-and-vertex"}, {"path": "khan/math/algebra/quadratics/features-of-quadratic-functions/rewriting-expressions-to-reveal-information/", "id": "rewriting-expressions-to-reveal-information", "title": "Key features of quadratic functions", "slug": "rewriting-expressions-to-reveal-information", "kind": "Exercise"}, {"path": "khan/math/algebra/quadratics/features-of-quadratic-functions/modeling-mosquitos-with-quadratics/", "id": "fW1u-OFbA1M", "title": "Modeling mosquitos with quadratics", "kind": "Video", "slug": "modeling-mosquitos-with-quadratics"}, {"path": "khan/math/algebra/quadratics/features-of-quadratic-functions/key-features-quadratics/", "id": "key-features-quadratics", "title": "Finding and interpreting key features of quadratics", "slug": "key-features-quadratics", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "features-of-quadratic-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra/quadratics/features-of-quadratic-functions", "extended_slug": "math/algebra/quadratics/features-of-quadratic-functions", "kind": "Topic", "slug": "features-of-quadratic-functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/quadratics/solving_graphing_quadratics/", "id": "solving_graphing_quadratics", "hide": false, "title": "Graphing quadratics", "child_data": [{"kind": "Video", "id": "364967635"}, {"kind": "Video", "id": "26996"}, {"kind": "Video", "id": "26997"}, {"kind": "Video", "id": "xe4f68c07"}, {"kind": "Exercise", "id": "643274503"}, {"kind": "Video", "id": "23716"}, {"kind": "Video", "id": "xe26c2892"}, {"kind": "Exercise", "id": "643163590"}, {"kind": "Video", "id": "x78bacc55"}, {"kind": "Video", "id": "x45ecfbb1"}, {"kind": "Exercise", "id": "257422323"}, {"kind": "Video", "id": "xac1e66a2"}, {"kind": "Exercise", "id": "617781850"}, {"kind": "Exercise", "id": "617787563"}], "children": [{"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphing-a-quadratic-function/", "id": "nh3_IGxHA5A", "title": "Graphing a parabola with a table of values", "kind": "Video", "description": "Graphing a parabola with a table of values", "slug": "graphing-a-quadratic-function"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/quadratic-functions-2/", "id": "dfoXtodyiIA", "title": "Parabola vertex and axis of symmetry", "kind": "Video", "description": "Parabola vertex and axis of symmetry", "slug": "quadratic-functions-2"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/quadratic-functions-3/", "id": "TgKBc3Igx1I", "title": "Graphing a parabola by finding the roots and vertex", "kind": "Video", "description": "Graphing a parabola by finding the roots and vertex", "slug": "quadratic-functions-3"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/finding-the-vertex-of-a-parabola-example/", "id": "IbI-l7mbKO4", "title": "Finding the vertex of a parabola example", "kind": "Video", "slug": "finding-the-vertex-of-a-parabola-example"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/vertex_of_a_parabola/", "id": "vertex_of_a_parabola", "title": "Vertex of a parabola", "description": "Find the vertex of a parabola in standard form.", "slug": "vertex_of_a_parabola", "kind": "Exercise"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphs-of-quadratic-functions/", "id": "RjkTEyO5Zso", "title": "Multiple examples graphing parabolas using roots and vertices", "kind": "Video", "description": "Multiple examples graphing parabolas using roots and vertices", "slug": "graphs-of-quadratic-functions"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphing-a-parabola-using-roots-and-vertex/", "id": "MQtsRYPx3v0", "title": "Graphing a parabola using roots and vertex", "kind": "Video", "slug": "graphing-a-parabola-using-roots-and-vertex"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphing_parabolas_05/", "id": "graphing_parabolas_0.5", "title": "Graphing parabolas in standard form", "description": "Graph a parabola given the equation in the form ax^2+bx+c", "slug": "graphing_parabolas_05", "kind": "Exercise"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/shifting-and-scaling-parabolas/", "id": "99v51U3HSCU", "title": "Shifting and scaling parabolas", "kind": "Video", "slug": "shifting-and-scaling-parabolas"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/parabola-intuition-example-1/", "id": "Qv2pgv8ea-k", "title": "Parabola intuition example 1", "kind": "Video", "slug": "parabola-intuition-example-1"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/parabola_intuition_1/", "id": "parabola_intuition_1", "title": "Parabola intuition 1", "description": "Make one parabola overlap with another by adjusting the leading coefficient and vertex coordinates.", "slug": "parabola_intuition_1", "kind": "Exercise"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphing-a-parabola-in-vertex-form/", "id": "7QMoNY6FzvM", "title": "Graphing a parabola in vertex form", "kind": "Video", "slug": "graphing-a-parabola-in-vertex-form"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphing_parabolas_1/", "id": "graphing_parabolas_1", "title": "Graphing parabolas in vertex form", "description": "Graph a parabola given the equation in the form a(x+b)^2+c", "slug": "graphing_parabolas_1", "kind": "Exercise"}, {"path": "khan/math/algebra/quadratics/solving_graphing_quadratics/graphing_parabolas_2/", "id": "graphing_parabolas_2", "title": "Graphing parabolas in all forms", "description": "Graph a parabola in vertex or standard form.", "slug": "graphing_parabolas_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Tired of lines? Not sure if a parabola is a disease of the gut or a new mode of transportation? Ever wondered what would happen to the graph of a function if you stuck an x\u00b2 someplace? Well, look no further.\n\nIn this tutorial, we will study the graphs of quadratic functions (parabolas), including their foci and whatever the plural of directrix is.", "node_slug": "solving_graphing_quadratics", "render_type": "Tutorial", "topic_page_url": "/math/algebra/quadratics/solving_graphing_quadratics", "extended_slug": "math/algebra/quadratics/solving_graphing_quadratics", "kind": "Topic", "slug": "solving_graphing_quadratics"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra/quadratics/quadratic_inequalities/", "id": "quadratic_inequalities", "hide": false, "title": "Quadratic inequalities", "child_data": [{"kind": "Video", "id": "x63a87fa0"}, {"kind": "Video", "id": "x3de63390"}, {"kind": "Video", "id": "23502"}], "children": [{"path": "khan/math/algebra/quadratics/quadratic_inequalities/quadratic-inequality-example/", "id": "OP91XWBRI1w", "title": "Quadratic inequality example", "kind": "Video", "slug": "quadratic-inequality-example"}, {"path": "khan/math/algebra/quadratics/quadratic_inequalities/quadratic-inequality-example-2/", "id": "YS_3XRj74oo", "title": "Quadratic inequality example 2", "kind": "Video", "slug": "quadratic-inequality-example-2"}, {"path": "khan/math/algebra/quadratics/quadratic_inequalities/quadratic-inequalities-visual-explanation/", "id": "xdiBjypYFRQ", "title": "Quadratic inequalities (visual explanation)", "kind": "Video", "description": "How to solve a quadratic inequality. Visual intuition of what a quadratic inequality means.", "slug": "quadratic-inequalities-visual-explanation"}], "in_knowledge_map": false, "description": "You are familiar with factoring quadratic expressions and solving quadratic equations. Well, as you might guess, not everything in life has to be equal.\n\nIn this short tutorial we will look at quadratic inequalities.", "node_slug": "quadratic_inequalities", "render_type": "Tutorial", "topic_page_url": "/math/algebra/quadratics/quadratic_inequalities", "extended_slug": "math/algebra/quadratics/quadratic_inequalities", "kind": "Topic", "slug": "quadratic_inequalities"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra/quadratics/quadratic_odds_ends/", "id": "quadratic_odds_ends", "hide": false, "title": "Quadratic odds and ends", "child_data": [{"kind": "Video", "id": "23484"}, {"kind": "Video", "id": "24378"}, {"kind": "Video", "id": "24410"}, {"kind": "Video", "id": "24412"}, {"kind": "Video", "id": "24380"}, {"kind": "Video", "id": "23492"}, {"kind": "Video", "id": "23494"}, {"kind": "Video", "id": "23498"}, {"kind": "Video", "id": "24382"}, {"kind": "Video", "id": "24384"}], "children": [{"path": "khan/math/algebra/quadratics/quadratic_odds_ends/solving-a-quadratic-by-factoring/", "id": "N30tN9158Kc", "title": "Solving a quadratic by factoring", "kind": "Video", "description": "factoring quadratics", "slug": "solving-a-quadratic-by-factoring"}, {"path": "khan/math/algebra/quadratics/quadratic_odds_ends/ca-algebra-i-factoring-quadratics/", "id": "K5ggNnKTmNM", "title": "CA Algebra I: Factoring quadratics", "kind": "Video", "description": "44-47, factoring quadratics", "slug": "ca-algebra-i-factoring-quadratics"}, {"path": "khan/math/algebra/quadratics/quadratic_odds_ends/algebra-ii-quadratics-and-shifts/", "id": "GHDrDdu6vrU", "title": "Algebra II: Quadratics and shifts", "kind": "Video", "description": "32-35, Solving quadratics and graph shifts", "slug": "algebra-ii-quadratics-and-shifts"}, {"path": "khan/math/algebra/quadratics/quadratic_odds_ends/algebra-ii-shifting-quadratic-graphs/", "id": "X9rTIwc1wRU", "title": "Examples: Graphing and interpreting quadratics", "kind": "Video", "description": "36-38, shifting quadratic graphs and finding x-intercepts (roots)", "slug": "algebra-ii-shifting-quadratic-graphs"}, {"path": "khan/math/algebra/quadratics/quadratic_odds_ends/ca-algebra-i-completing-the-square/", "id": "8M4c8TB3Cdc", "title": "CA Algebra I: Completing the square", "kind": "Video", "description": "48-52, completing the square", "slug": "ca-algebra-i-completing-the-square"}, {"path": "khan/math/algebra/quadratics/quadratic_odds_ends/introduction-to-the-quadratic-equation/", "id": "IWigvJcCAJ0", "title": "Introduction to the quadratic equation", "kind": "Video", "description": "Introduction to using the quadratic equation to solve 2nd degree polynomial equations", "slug": "introduction-to-the-quadratic-equation"}, {"path": "khan/math/algebra/quadratics/quadratic_odds_ends/quadratic-equation-part-2/", "id": "y19jYxzY8Y8", "title": "Quadratic equation part 2", "kind": "Video", "description": "2 more examples of solving equations using the quadratic equation", "slug": "quadratic-equation-part-2"}, {"path": "khan/math/algebra/quadratics/quadratic_odds_ends/quadratic-formula-proof/", "id": "mDmRYfma9C0", "title": "Quadratic formula (proof)", "kind": "Video", "description": "Deriving the quadratic formula by completing the square.", "slug": "quadratic-formula-proof"}, {"path": "khan/math/algebra/quadratics/quadratic_odds_ends/ca-algebra-i-quadratic-equation/", "id": "tSNtCg7o7bA", "title": "CA Algebra I: Quadratic equation", "kind": "Video", "description": "53-57, Quadratic Equation", "slug": "ca-algebra-i-quadratic-equation"}, {"path": "khan/math/algebra/quadratics/quadratic_odds_ends/ca-algebra-i-quadratic-roots/", "id": "uA6mcx4FMN8", "title": "CA Algebra I: Quadratic roots", "kind": "Video", "description": "58-62, x-intercepts of a quadratic function", "slug": "ca-algebra-i-quadratic-roots"}], "in_knowledge_map": false, "description": "This tutorial has a bunch of extra, but random, videos on quadratics. A completely optional tutorial that you may or may not want to look at. If you do, watch it last. There are some Sal oldies here and some random examples.", "node_slug": "quadratic_odds_ends", "render_type": "Tutorial", "topic_page_url": "/math/algebra/quadratics/quadratic_odds_ends", "extended_slug": "math/algebra/quadratics/quadratic_odds_ends", "kind": "Topic", "slug": "quadratic_odds_ends"}], "in_knowledge_map": true, "description": "In this topic, we'll analyze, graph and solve quadratic equations.", "node_slug": "quadratics", "render_type": "Topic", "topic_page_url": "/math/algebra/quadratics", "extended_slug": "math/algebra/quadratics", "kind": "Topic", "slug": "quadratics"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra/rational-exponents-and-radicals/", "id": "rational-exponents-and-radicals", "hide": false, "title": "Expressions with rational exponents and radicals", "child_data": [{"kind": "Topic", "id": "xd1cbdbe7"}, {"kind": "Topic", "id": "x12c1c9bb"}, {"kind": "Topic", "id": "xe24eff25"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/", "id": "introduction-to-rational-exponents-and-radicals", "hide": false, "title": "Introduction to rational exponents and radicals", "child_data": [{"kind": "Video", "id": "x77aefe04"}, {"kind": "Video", "id": "23742"}, {"kind": "Exercise", "id": "x0b465be9"}, {"kind": "Video", "id": "x22d2b44c"}, {"kind": "Video", "id": "x6f810954"}, {"kind": "Video", "id": "x86a0dd64"}, {"kind": "Video", "id": "xe5b92d45"}, {"kind": "Exercise", "id": "3028"}], "children": [{"path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/basic-fractional-exponents/", "id": "lZfXc4nHooo", "title": "Introduction to rational exponents", "kind": "Video", "description": "Sal explains what it means to take a number by a power which is a unit fraction, like 1/2, 1/3, etc.", "slug": "basic-fractional-exponents"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/radical-expressions-with-higher-roots/", "id": "iX7ivCww2ws", "title": "The relationship between radicals and unit-fraction exponents", "kind": "Video", "description": "Sal explains the relationship between radical notation and unit-fraction exponents, including a discussion of what the principal square root is. Then he shows how to simplify the 6th root of (64x^8) using the properties of exponents.", "slug": "radical-expressions-with-higher-roots"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/understanding-fractional-exponents/", "id": "understanding-fractional-exponents", "title": "Unit-fraction exponents and radicals", "description": "Evaluate numerical expressions with unit-fraction exponents or radicals, and convert between the two forms of representations.", "slug": "understanding-fractional-exponents", "kind": "Exercise"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/negative-fractional-exponent-examples/", "id": "tn53EdOr6Rw", "title": "How to evaluate numerical expressions with a negative unit-fraction exponent (example)", "kind": "Video", "description": "Sal shows how to evaluate 9^(-1/2) and 27^(-1/3).", "slug": "negative-fractional-exponent-examples"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/fractional-exponents-with-numerators-other-than-1/", "id": "S34NM0Po0eA", "title": "How to evaluate numerical expressions with a rational exponent (example)", "kind": "Video", "description": "Sal shows how to evaluate 64^(2/3) and (8/27)^(-2/3).", "slug": "fractional-exponents-with-numerators-other-than-1"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/negative-fractional-exponent-examples-2/", "id": "bIFdW0NZ9W4", "title": "How to evaluate a rational-exponent expression with a rational number at the base (example)", "kind": "Video", "description": "Sal shows how to evaluate (25/9)^(1/2) and (81/256)^(-1/4).", "slug": "negative-fractional-exponent-examples-2"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/solving-for-a-fractional-exponent/", "id": "6OFwfxmhtE8", "title": "How to rewrite a radical expression as a single exponential term (example)", "kind": "Video", "description": "Sal solves the unknown in 3^a = 5th root of (3^2).", "slug": "solving-for-a-fractional-exponent"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals/exponents_3/", "id": "exponents_3", "title": "Rational exponents and radicals", "description": "Evaluate numerical expressions with rational exponents, and convert between equivalent forms of exponential and radical expressions.", "slug": "exponents_3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial you will learn about radicals and about rational exponents and practice how to change back and forth from these two types of notation.", "node_slug": "introduction-to-rational-exponents-and-radicals", "render_type": "Tutorial", "topic_page_url": "/math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals", "extended_slug": "math/algebra/rational-exponents-and-radicals/introduction-to-rational-exponents-and-radicals", "kind": "Topic", "slug": "introduction-to-rational-exponents-and-radicals"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions/", "id": "simplifying-radical-expressions", "hide": false, "title": "Simplifying numerical radical expressions", "child_data": [{"kind": "Exercise", "id": "3029"}, {"kind": "Video", "id": "127771046"}, {"kind": "Video", "id": "127771043"}, {"kind": "Exercise", "id": "347994616"}, {"kind": "Video", "id": "23746"}, {"kind": "Video", "id": "127771045"}, {"kind": "Exercise", "id": "347957645"}], "children": [{"path": "khan/math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions/simplifying_radicals/", "id": "simplifying_radicals", "title": "Simplify numerical radical terms", "description": "Simplify numerical radical terms by removing all factors that are perfect squares from inside the radical.", "slug": "simplifying_radicals", "kind": "Exercise"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions/adding-and-simplifying-radicals/", "id": "egNq4tSfi1I", "title": "How to simplify a sum of radical terms (example)", "kind": "Video", "description": "Sal shows how to group like terms to add and simplify radical terms, by simplifying the expression \u221a(2x^2)+4\u221a8+3\u221a(2x^2)+\u221a8.", "slug": "adding-and-simplifying-radicals"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions/subtracting-and-simplifying-radicals/", "id": "qH4IQfDD1Nw", "title": "How to simplify a difference of radical terms (example)", "kind": "Video", "description": "Sal shows how to group like terms to subtract and simplify radical terms, by simplifying the expression 4\u221c(81x^5)-2\u221c(81x^5)-\u221a(x^3).", "slug": "subtracting-and-simplifying-radicals"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions/multiplying_radicals/", "id": "multiplying_radicals", "title": "Add, subtract, multiply, and divide numerical radical terms", "description": "Practice simplifying radical expressions with two terms.", "slug": "multiplying_radicals", "kind": "Exercise"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions/how-to-rationalize-a-denominator/", "id": "gY5TvlHg4Vk", "title": "How to rationalize a radical denominator (example)", "kind": "Video", "description": "Sal shows how to manipulate expressions like 1/\u221a2 and 12/(2-\u221a5) so there's no radical in the denominator. This is called \"rationalizing the denominator.\"", "slug": "how-to-rationalize-a-denominator"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions/rationalizing-denominators-of-expressions/", "id": "Z3db5itCIiQ", "title": "How to rationalize a radical denominator in a variable expression (example)", "kind": "Video", "description": "Sal shows how to rationalize the denominator of the expression (16+2x^2)/(\u221a8).", "slug": "rationalizing-denominators-of-expressions"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions/adding_and_subtracting_radicals/", "id": "adding_and_subtracting_radicals", "title": "Simplify numerical radical expressions with multiple terms", "description": "Practice simplifying expressions with multiple radical terms combined by addition, subtraction, multiplication, and/or division.", "slug": "adding_and_subtracting_radicals", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial you will simplify numerical expressions with radicals by removing all factors that are perfect squares from inside the radical.", "node_slug": "simplifying-radical-expressions", "render_type": "Tutorial", "topic_page_url": "/math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions", "extended_slug": "math/algebra/rational-exponents-and-radicals/simplifying-radical-expressions", "kind": "Topic", "slug": "simplifying-radical-expressions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/", "id": "rational-exponents-and-the-properties-of-exponents", "hide": false, "title": "Rational exponents and the properties of exponents", "child_data": [{"kind": "Exercise", "id": "196075508"}, {"kind": "Video", "id": "126711576"}, {"kind": "Video", "id": "126711577"}, {"kind": "Video", "id": "127771042"}, {"kind": "Video", "id": "127771044"}, {"kind": "Video", "id": "xf256dbf5"}, {"kind": "Video", "id": "126711579"}, {"kind": "Exercise", "id": "xd7f28efa"}, {"kind": "Video", "id": "126711575"}, {"kind": "Video", "id": "26914"}, {"kind": "Exercise", "id": "x878279d8"}], "children": [{"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/exponents_4/", "id": "exponents_4", "title": "Single-step simplification of rational exponent expressions", "description": "Evaluate numerical exponential expressions and simplify variable exponential expressions by using the properties of exponents.", "slug": "exponents_4", "kind": "Exercise"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/simplifying-square-roots-comment-response/", "id": "qFFhdLlX220", "title": "How to simplify a variable square root expression (example)", "kind": "Video", "description": "Sal shows how to simplify 3\u221a(500x^3).", "slug": "simplifying-square-roots-comment-response"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/rational-exponents-and-exponent-laws/", "id": "NuccqpiUHrk", "title": "How to simplify a variable cube root expression (example)", "kind": "Video", "description": "Sal shows how to simplify \u221b(125x^6y^3).", "slug": "rational-exponents-and-exponent-laws"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/multiply-and-simplify-a-radical-expression-2/", "id": "sBvRJUwXJPo", "title": "How to simplify a division of two variable square root expressions (example)", "kind": "Video", "description": "Sal shows how to simplify\u00a0\u221a(60x^2y)/\u221a(48x).", "slug": "multiply-and-simplify-a-radical-expression-2"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/multiply-and-simplify-a-radical-expression-1/", "id": "GEeKOeGHddY", "title": "How to simplify a product of two variable cube root expressions (example)", "kind": "Video", "description": "Sal shows how to simplify 5\u221b(2x^2)*3\u221b(4x^4).", "slug": "multiply-and-simplify-a-radical-expression-1"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/simplifying-with-exponent-properties/", "id": "Ht-YXje4R2g", "title": "How to evaluate a numerical expression with mixed exponential and radical terms (example)", "kind": "Video", "description": "Sal shows how to evaluate 6^(1/2)*(5th root of 6)^3.", "slug": "simplifying-with-exponent-properties"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/simplifying-cube-roots/", "id": "c-wtvEdEoVs", "title": "How to simplify a cube root expression with multiple variables (example)", "kind": "Video", "description": "Sal shows how to simplify\u00a0\u221b(27a^2b^5c^3).", "slug": "simplifying-cube-roots"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/simplify-radicals-and-exponentials/", "id": "simplify-radicals-and-exponentials", "title": "Single-step simplification of radical expressions", "description": "Evaluate numerical radical expressions and simplify variable radical expressions by using the properties of exponents.", "slug": "simplify-radicals-and-exponentials", "kind": "Exercise"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/radical-equivalent-to-rational-exponents-2/", "id": "zlRKO21qEpQ", "title": "How to rewrite a radical expression with multiple variables as an exponential expression (example)", "kind": "Video", "description": "Sal shows how to rewrite\u00a0\u221c(5a^4b^12) as an exponential expression and then simplify it.", "slug": "radical-equivalent-to-rational-exponents-2"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/fractional-exponent-expressions-2/", "id": "4F6cFLnAAFc", "title": "How to simplify a variable expression with mixed exponential and radical terms (example)", "kind": "Video", "description": "Sal rewrites (r^(2/3)s^3)^2*\u221a(20r^4s^5), once as an exponential expression and once as a radical expression.", "slug": "fractional-exponent-expressions-2"}, {"path": "khan/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents/manipulating-fractional-exponents/", "id": "manipulating-fractional-exponents", "title": "Multi-step simplification of rational exponent expressions", "description": "Evaluate numerical expressions and simplify variable expressions with mixed exponential and radical terms, by using the properties of exponents.", "slug": "manipulating-fractional-exponents", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial you will rewrite variable expressions with rational exponents and radicals using the properties of exponents.", "node_slug": "rational-exponents-and-the-properties-of-exponents", "render_type": "Tutorial", "topic_page_url": "/math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents", "extended_slug": "math/algebra/rational-exponents-and-radicals/rational-exponents-and-the-properties-of-exponents", "kind": "Topic", "slug": "rational-exponents-and-the-properties-of-exponents"}], "in_knowledge_map": false, "description": "Learn about expressions with rational exponents like x^(2/3), about radical expressions like \u221a(2t^5), and about the relationship between these two forms of representation. Learn how to evaluate and simplify such expression.", "node_slug": "rational-exponents-and-radicals", "render_type": "Topic", "topic_page_url": "/math/algebra/rational-exponents-and-radicals", "extended_slug": "math/algebra/rational-exponents-and-radicals", "kind": "Topic", "slug": "rational-exponents-and-radicals"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra/introduction-to-exponential-functions/", "id": "introduction-to-exponential-functions", "hide": false, "title": "Introduction to exponential functions", "child_data": [{"kind": "Topic", "id": "x6f5f76df"}, {"kind": "Topic", "id": "x3e24bdf8"}, {"kind": "Topic", "id": "xc0e36086"}, {"kind": "Topic", "id": "x49e483d7"}, {"kind": "Topic", "id": "x3f10fb97"}, {"kind": "Topic", "id": "x2cbe9be2"}, {"kind": "Topic", "id": "x3ebb9c45"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-exponential-functions/exponential-growth-and-decay/", "id": "exponential-growth-and-decay", "hide": false, "title": "Introduction to exponential growth and decay", "child_data": [{"kind": "Video", "id": "23694"}, {"kind": "Exercise", "id": "x8ff2077f"}, {"kind": "Video", "id": "x6c7009f6"}, {"kind": "Video", "id": "x94bf277a"}, {"kind": "Exercise", "id": "x18852d2b"}], "children": [{"path": "khan/math/algebra/introduction-to-exponential-functions/exponential-growth-and-decay/exponential-growth-functions/", "id": "6WMZ7J0wwMI", "title": "Introduction to exponential functions", "kind": "Video", "description": "Sal introduces and defines exponential functions using the example y = 3^x and graphing it. He also solves an exponential word problem.", "slug": "exponential-growth-functions"}, {"path": "khan/math/algebra/introduction-to-exponential-functions/exponential-growth-and-decay/construct-basic-exponential-functions-from-initial-value-and-common-ratio/", "id": "construct-basic-exponential-functions-from-initial-value-and-common-ratio", "title": "Construct basic exponential functions from the initial value and the common ratio", "description": "Construct exponential functions of the basic form f(x)=a*r^x given the initial value of the function and the ratio by which it increases for each unit.", "slug": "construct-basic-exponential-functions-from-initial-value-and-common-ratio", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-exponential-functions/exponential-growth-and-decay/constructing-linear-and-exponential-functions-from-data/", "id": "Qst1UVtq8pE", "title": "How to construct linear and basic exponential functions from a table of values (example)", "kind": "Video", "description": "Sal constructs a linear function of the form f(x)=mx+b and an exponential function of the form g(x)=a*r^x, given a table of values of those functions.", "slug": "constructing-linear-and-exponential-functions-from-data"}, {"path": "khan/math/algebra/introduction-to-exponential-functions/exponential-growth-and-decay/constructing-linear-and-exponential-functions-from-graph/", "id": "-VQf_hJOEvM", "title": "How to construct linear and basic exponential functions from their graphs (example)", "kind": "Video", "description": "Sal constructs a linear function of the form f(x)=mx+b and an exponential function of the form g(x)=a*r^x, given the graphs of those functions.", "slug": "constructing-linear-and-exponential-functions-from-graph"}, {"path": "khan/math/algebra/introduction-to-exponential-functions/exponential-growth-and-decay/construct-basic-exponential-functions-from-table-or-graph/", "id": "construct-basic-exponential-functions-from-table-or-graph", "title": "Construct basic exponential functions from a table or a graph", "description": "Construct exponential functions of the basic form f(x)=a*r^x, either when given a table with two input-output pairs, or when given the graph of the function.", "slug": "construct-basic-exponential-functions-from-table-or-graph", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn about exponential growth and decay, and specifically how it always grows (or diminishes) by equal factors.", "node_slug": "exponential-growth-and-decay", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-exponential-functions/exponential-growth-and-decay", "extended_slug": "math/algebra/introduction-to-exponential-functions/exponential-growth-and-decay", "kind": "Topic", "slug": "exponential-growth-and-decay"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-exponential-functions/graphs-of-basic-exponential-functions/", "id": "graphs-of-basic-exponential-functions", "hide": false, "title": "End behavior and graphs of basic exponential functions", "child_data": [{"kind": "Video", "id": "364954029"}, {"kind": "Exercise", "id": "x3d8acce9"}], "children": [{"path": "khan/math/algebra/introduction-to-exponential-functions/graphs-of-basic-exponential-functions/graphing-exponential-functions/", "id": "9SOSfRNCQZQ", "title": "How to graph a basic exponential function given its formula (example)", "kind": "Video", "description": "Sal shows how to graph y=5^x, including a discussion of the end behavior of the function.", "slug": "graphing-exponential-functions"}, {"path": "khan/math/algebra/introduction-to-exponential-functions/graphs-of-basic-exponential-functions/graphs-of-basic-exponential-functions/", "id": "graphs-of-basic-exponential-functions", "title": "Graphs of basic exponential functions", "description": "Graph exponential functions of the basic form f(x)=a*r^x while considering the end behavior of the function.", "slug": "graphs-of-basic-exponential-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how an exponential function behaves as the value of its input increases to positive infinity or decreases to negative infinity. Learn how to graph basic exponential functions.", "node_slug": "graphs-of-basic-exponential-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-exponential-functions/graphs-of-basic-exponential-functions", "extended_slug": "math/algebra/introduction-to-exponential-functions/graphs-of-basic-exponential-functions", "kind": "Topic", "slug": "graphs-of-basic-exponential-functions"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/algebra/introduction-to-exponential-functions/interpreting-formulas-of-basic-exponential-functions/", "id": "interpreting-formulas-of-basic-exponential-functions", "hide": false, "title": "Interpreting formulas of basic exponential functions", "child_data": [{"kind": "Exercise", "id": "xa71acfbe"}], "children": [{"path": "khan/math/algebra/introduction-to-exponential-functions/interpreting-formulas-of-basic-exponential-functions/interpret-formulas-of-basic-exponential-functions/", "id": "interpret-formulas-of-basic-exponential-functions", "title": "Interpret formulas of basic exponential functions", "description": "Find features of exponential functions of the basic form f(x)=a*r^x given their formula. Features in question are the initial value, the common ratio, and output-values that correspond to various input-values.", "slug": "interpret-formulas-of-basic-exponential-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to analyze the formulas of basic exponential functions in order to find their common ratio, initial value, and other parameters.", "node_slug": "interpreting-formulas-of-basic-exponential-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-exponential-functions/interpreting-formulas-of-basic-exponential-functions", "extended_slug": "math/algebra/introduction-to-exponential-functions/interpreting-formulas-of-basic-exponential-functions", "kind": "Topic", "slug": "interpreting-formulas-of-basic-exponential-functions"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/algebra/introduction-to-exponential-functions/interpreting-graphs-and-tables-of-basic-exponential-functions/", "id": "interpreting-graphs-and-tables-of-basic-exponential-functions", "hide": false, "title": "Interpreting graphs and tables of basic exponential functions", "child_data": [{"kind": "Exercise", "id": "x12706045"}], "children": [{"path": "khan/math/algebra/introduction-to-exponential-functions/interpreting-graphs-and-tables-of-basic-exponential-functions/interpret-graphs-and-tables-of-basic-exponential-functions/", "id": "interpret-graphs-and-tables-of-basic-exponential-functions", "title": "Interpret graphs and tables of basic exponential functions", "description": "Find features of exponential functions of the basic form f(x)=a*r^x, either given a table with input-output pairs, or given their graph. Features in question are the initial value, the common ratio, and output-values that correspond to various input-values.", "slug": "interpret-graphs-and-tables-of-basic-exponential-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to analyze the graphs, or tables of values, of basic exponential functions in order to find their common ratio, initial value, and other parameters.", "node_slug": "interpreting-graphs-and-tables-of-basic-exponential-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-exponential-functions/interpreting-graphs-and-tables-of-basic-exponential-functions", "extended_slug": "math/algebra/introduction-to-exponential-functions/interpreting-graphs-and-tables-of-basic-exponential-functions", "kind": "Topic", "slug": "interpreting-graphs-and-tables-of-basic-exponential-functions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra/introduction-to-exponential-functions/constructing-basic-exponential-models/", "id": "constructing-basic-exponential-models", "hide": false, "title": "Constructing basic exponential models", "child_data": [{"kind": "Video", "id": "xd71282d5"}], "children": [{"path": "khan/math/algebra/introduction-to-exponential-functions/constructing-basic-exponential-models/modeling-ticket-fines-with-exponential-function/", "id": "EtefJ85R1OQ", "title": "How to model a real-world context with a basic exponential function (example)", "kind": "Video", "description": "Sal solves a word problem where he models the growth of a speeding ticket fine over time as an exponential function, and then interprets this model.", "slug": "modeling-ticket-fines-with-exponential-function"}], "in_knowledge_map": false, "description": "Learn how to construct exponential functions to model real-world situations.", "node_slug": "constructing-basic-exponential-models", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-exponential-functions/constructing-basic-exponential-models", "extended_slug": "math/algebra/introduction-to-exponential-functions/constructing-basic-exponential-models", "kind": "Topic", "slug": "constructing-basic-exponential-models"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra/introduction-to-exponential-functions/solving-basic-exponential-models/", "id": "solving-basic-exponential-models", "hide": false, "title": "Solving basic exponential models", "child_data": [{"kind": "Video", "id": "23700"}], "children": [{"path": "khan/math/algebra/introduction-to-exponential-functions/solving-basic-exponential-models/word-problem-solving-exponential-growth-and-decay/", "id": "m5Tf6vgoJtQ", "title": "How to solve word problems about exponential growth and decay (examples)", "kind": "Video", "description": "Sal solves two word problems: one about a radioactive decay, and the other the exponential growth of a fast-food chain.", "slug": "word-problem-solving-exponential-growth-and-decay"}], "in_knowledge_map": false, "description": "Learn how to construct exponential functions and then analyze them to model and solve real-world problems.", "node_slug": "solving-basic-exponential-models", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-exponential-functions/solving-basic-exponential-models", "extended_slug": "math/algebra/introduction-to-exponential-functions/solving-basic-exponential-models", "kind": "Topic", "slug": "solving-basic-exponential-models"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/introduction-to-exponential-functions/comparing-exponential-and-polynomial-functions/", "id": "comparing-exponential-and-polynomial-functions", "hide": false, "title": "Comparing exponential and polynomial functions", "child_data": [{"kind": "Video", "id": "x9c757281"}, {"kind": "Exercise", "id": "x84d72f79"}, {"kind": "Video", "id": "x51b990d2"}, {"kind": "Exercise", "id": "xde032092"}], "children": [{"path": "khan/math/algebra/introduction-to-exponential-functions/comparing-exponential-and-polynomial-functions/linear-exponential-models/", "id": "8OHEgD6YMBw", "title": "How to distinguish between linear and exponential models (examples)", "kind": "Video", "description": "Sal sorts various descriptions of real-world situation according to the type of growth they describe: linear or exponential.", "slug": "linear-exponential-models"}, {"path": "khan/math/algebra/introduction-to-exponential-functions/comparing-exponential-and-polynomial-functions/understanding-linear-and-exponential-models/", "id": "understanding-linear-and-exponential-models", "title": "Distinguish between linear and exponential models", "description": "Given a verbal description of a real-world relationship, determine whether that relationship is linear or exponential.", "slug": "understanding-linear-and-exponential-models", "kind": "Exercise"}, {"path": "khan/math/algebra/introduction-to-exponential-functions/comparing-exponential-and-polynomial-functions/comparing-exponentials-quadratics/", "id": "EuwKjpUpkhs", "title": "How to compare the growth of an exponential model and a quadratic model (example)", "kind": "Video", "description": "Sal discusses two functions that model the shipment rate of cars. One function is quadratic and the other is exponential. Which one will eventually exceed the other?", "slug": "comparing-exponentials-quadratics"}, {"path": "khan/math/algebra/introduction-to-exponential-functions/comparing-exponential-and-polynomial-functions/comparing-growth-rates-of-exponentials-and-polynomials/", "id": "comparing-growth-rates-of-exponentials-and-polynomials", "title": "Compare the growth rates of exponentials and polynomials", "description": "Practice analyzing the end behavior of two functions that model similar real-world relationship, where one function is exponential and the other is polynomial.", "slug": "comparing-growth-rates-of-exponentials-and-polynomials", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how distinguish between linear and exponential growth, and learn the differences between the end behavior of polynomial and exponential functions.", "node_slug": "comparing-exponential-and-polynomial-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra/introduction-to-exponential-functions/comparing-exponential-and-polynomial-functions", "extended_slug": "math/algebra/introduction-to-exponential-functions/comparing-exponential-and-polynomial-functions", "kind": "Topic", "slug": "comparing-exponential-and-polynomial-functions"}], "in_knowledge_map": false, "description": "Learn how to construct, analyze, graph, and interpret basic exponential functions of the form f(x)=a*r^x.", "node_slug": "introduction-to-exponential-functions", "render_type": "Topic", "topic_page_url": "/math/algebra/introduction-to-exponential-functions", "extended_slug": "math/algebra/introduction-to-exponential-functions", "kind": "Topic", "slug": "introduction-to-exponential-functions"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra/rational-and-irrational-numbers/", "id": "rational-and-irrational-numbers", "hide": false, "title": "Rational and irrational numbers", "child_data": [{"kind": "Topic", "id": "x03478b6f"}, {"kind": "Topic", "id": "x075eb43a"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/", "id": "irrational-numbers", "hide": false, "title": "Rational and irrational numbers", "child_data": [{"kind": "Video", "id": "x2d1f5fa7"}, {"kind": "Video", "id": "x8924c336"}, {"kind": "Video", "id": "x5725b03f"}, {"kind": "Video", "id": "x04436acf"}, {"kind": "Video", "id": "x00ce2e4a"}, {"kind": "Exercise", "id": "x4eaeba29"}], "children": [{"path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/introduction-to-rational-and-irrational-numbers/", "id": "cLP7INqs3JM", "title": "Introduction to rational and irrational numbers", "kind": "Video", "description": "Learn what rational and irrational numbers are and how to tell them apart.", "slug": "introduction-to-rational-and-irrational-numbers"}, {"path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/proof-that-square-root-of-2-is-irrational/", "id": "mX91_3GQqLY", "title": "Proof that square root of 2 is irrational", "kind": "Video", "slug": "proof-that-square-root-of-2-is-irrational"}, {"path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/proof-that-square-root-of-prime-number-is-irrational/", "id": "W-Nio466Ek4", "title": "Proof that square root of prime number is irrational", "kind": "Video", "slug": "proof-that-square-root-of-prime-number-is-irrational"}, {"path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/proof-that-there-is-an-irrational-number-between-any-two-rational-numbers/", "id": "hxqo_DiL3pw", "title": "Proof that there is an irrational number between any two rational numbers", "kind": "Video", "slug": "proof-that-there-is-an-irrational-number-between-any-two-rational-numbers"}, {"path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/recognizing-irrational-numbers/", "id": "d9pO2z2qvXU", "title": "Recognizing rational and irrational numbers (examples)", "kind": "Video", "description": "Given a bunch of numbers, learn how to tell which are rational and which are irrational.", "slug": "recognizing-irrational-numbers"}, {"path": "khan/math/algebra/rational-and-irrational-numbers/irrational-numbers/recognizing-rational-and-irrational-numbers/", "id": "recognizing-rational-and-irrational-numbers", "title": "Recognizing rational and irrational numbers", "description": "Practice identifying whether numbers are rational or irrational.", "slug": "recognizing-rational-and-irrational-numbers", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn about irrational numbers: what are they? How do we know they exist? How many of them there are? Also learn how to distinguish irrational numbers from rational numbers.", "node_slug": "irrational-numbers", "render_type": "Tutorial", "topic_page_url": "/math/algebra/rational-and-irrational-numbers/irrational-numbers", "extended_slug": "math/algebra/rational-and-irrational-numbers/irrational-numbers", "kind": "Topic", "slug": "irrational-numbers"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra/rational-and-irrational-numbers/rational-and-irrational-expressions/", "id": "rational-and-irrational-expressions", "hide": false, "title": "Rational and irrational expressions", "child_data": [{"kind": "Video", "id": "x1ff9a2a1"}, {"kind": "Video", "id": "xf3863cc0"}, {"kind": "Video", "id": "xeb700d9f"}, {"kind": "Video", "id": "x85d5add2"}, {"kind": "Exercise", "id": "xac24581e"}], "children": [{"path": "khan/math/algebra/rational-and-irrational-numbers/rational-and-irrational-expressions/sum-and-product-of-rational-numbers/", "id": "HKUJkMQsGkM", "title": "Sum and product of rational numbers", "kind": "Video", "description": "Learn that the sum or the product of two rational numbers is always a rational number.", "slug": "sum-and-product-of-rational-numbers"}, {"path": "khan/math/algebra/rational-and-irrational-numbers/rational-and-irrational-expressions/proof-that-rational-times-irrational-is-irrational/", "id": "KT32CsdEZEY", "title": "Proof that rational times irrational is irrational", "kind": "Video", "slug": "proof-that-rational-times-irrational-is-irrational"}, {"path": "khan/math/algebra/rational-and-irrational-numbers/rational-and-irrational-expressions/proof-that-sum-of-rational-and-irrational-is-irrational/", "id": "pPM72fPwIjw", "title": "Proof that sum of rational and irrational is irrational", "kind": "Video", "slug": "proof-that-sum-of-rational-and-irrational-is-irrational"}, {"path": "khan/math/algebra/rational-and-irrational-numbers/rational-and-irrational-expressions/recognizing-rational-and-irrational-expressions-example/", "id": "hTJgK-wZMcE", "title": "Recognizing rational and irrational expressions example", "kind": "Video", "slug": "recognizing-rational-and-irrational-expressions-example"}, {"path": "khan/math/algebra/rational-and-irrational-numbers/rational-and-irrational-expressions/recognizing-rational-and-irrational-expressions/", "id": "recognizing-rational-and-irrational-expressions", "title": "Recognizing rational and irrational expressions", "slug": "recognizing-rational-and-irrational-expressions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Determine whether various combinations of rational and irrational numbers are rational or irrational themselves.", "node_slug": "rational-and-irrational-expressions", "render_type": "Tutorial", "topic_page_url": "/math/algebra/rational-and-irrational-numbers/rational-and-irrational-expressions", "extended_slug": "math/algebra/rational-and-irrational-numbers/rational-and-irrational-expressions", "kind": "Topic", "slug": "rational-and-irrational-expressions"}], "in_knowledge_map": false, "description": "Learn about irrational numbers and how to identify them.", "node_slug": "rational-and-irrational-numbers", "render_type": "Topic", "topic_page_url": "/math/algebra/rational-and-irrational-numbers", "extended_slug": "math/algebra/rational-and-irrational-numbers", "kind": "Topic", "slug": "rational-and-irrational-numbers"}, {"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/math/algebra/algebra-miscellaneous/", "id": "algebra-miscellaneous", "hide": false, "title": "Miscellaneous", "child_data": [{"kind": "Topic", "id": "x2806dadc"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/math/algebra/algebra-miscellaneous/cc-algebra-warmup/", "id": "cc-algebra-warmup", "hide": false, "title": "Algebra readiness warmup", "child_data": [{"kind": "Exercise", "id": "x20c0b163"}], "children": [{"path": "khan/math/algebra/algebra-miscellaneous/cc-algebra-warmup/algebra-1-warmup/", "id": "algebra-1-warmup", "title": "Algebra 1 warmup", "description": "Are you ready to tackle algebra? Check your understanding of foundational skills with this short quiz.", "slug": "algebra-1-warmup", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "cc-algebra-warmup", "render_type": "Tutorial", "topic_page_url": "/math/algebra/algebra-miscellaneous/cc-algebra-warmup", "extended_slug": "math/algebra/algebra-miscellaneous/cc-algebra-warmup", "kind": "Topic", "slug": "cc-algebra-warmup"}], "in_knowledge_map": false, "description": "", "node_slug": "algebra-miscellaneous", "render_type": "Topic", "topic_page_url": "/math/algebra/algebra-miscellaneous", "extended_slug": "math/algebra/algebra-miscellaneous", "kind": "Topic", "slug": "algebra-miscellaneous"}], "in_knowledge_map": false, "description": "Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It's also seen as a \"gatekeeper\" subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it's impossible to move forward. It's used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we'll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios.", "node_slug": "algebra", "render_type": "Subject", "topic_page_url": "/math/algebra", "extended_slug": "math/algebra", "kind": "Topic", "slug": "algebra"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/basic-geo/", "id": "basic-geo", "hide": false, "title": "Basic geometry", "child_data": [{"kind": "Topic", "id": "xc901cc55"}, {"kind": "Topic", "id": "x76ede3f0"}, {"kind": "Topic", "id": "xc3464376"}, {"kind": "Topic", "id": "x33e1074b"}, {"kind": "Topic", "id": "x21322ad6"}, {"kind": "Topic", "id": "xf5635951"}, {"kind": "Topic", "id": "xa4cc3960"}, {"kind": "Topic", "id": "x74fd3000"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-lines/", "id": "basic-geo-lines", "hide": false, "title": "Lines", "child_data": [{"kind": "Topic", "id": "xe6ad8e1f"}, {"kind": "Topic", "id": "x38b8ad4a"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-lines/basic-geo-lines-rays-angles/", "id": "basic-geo-lines-rays-angles", "hide": false, "title": "Lines, line segments and rays", "child_data": [{"kind": "Video", "id": "611293511"}, {"kind": "Video", "id": "611259516"}, {"kind": "Video", "id": "211177355"}, {"kind": "Exercise", "id": "205328272"}, {"kind": "Video", "id": "xfcdfb0ea"}, {"kind": "Exercise", "id": "x56a1eef4"}], "children": [{"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-lines-rays-angles/euclid-as-the-father-of-geometry/", "id": "WqzK3UAXaHs", "title": "Euclid as the father of geometry", "kind": "Video", "description": "We don't normally delve too far into history when talking about math, but sometimes it's important to have perspective about how some of our math concepts came about and how influential they have become.", "slug": "euclid-as-the-father-of-geometry"}, {"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-lines-rays-angles/language-and-notation-of-basic-geometry/", "id": "il0EJrY64qE", "title": "Basic geometry: language and labels", "kind": "Video", "description": "Before learning any new concept (mathematical or otherwise), it's important we learn and use a common language and label concepts consistently.", "slug": "language-and-notation-of-basic-geometry"}, {"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-lines-rays-angles/lines-line-segments-and-rays/", "id": "JcqCf762y9w", "title": "Intro to lines, line segments, and rays", "kind": "Video", "description": "Let's get familiar with the difference between lines, line segments, and rays. Hint: a ray is somewhere between a line and a line segment!", "slug": "lines-line-segments-and-rays"}, {"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-lines-rays-angles/recognizing_rays_lines_and_line_segments/", "id": "recognizing_rays_lines_and_line_segments", "title": "Recognizing rays, lines, and line segments", "description": "Identify rays, lines, and line segments in geometric figures.", "slug": "recognizing_rays_lines_and_line_segments", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-lines-rays-angles/drawing-lines-exercise-example/", "id": "DkZnevdbf0A", "title": "Drawing line segments example", "kind": "Video", "description": "Let's put our new knowledge of line segments to use in this example problem. We'll help you!", "slug": "drawing-lines-exercise-example"}, {"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-lines-rays-angles/drawing-lines/", "id": "drawing-lines", "title": "Drawing rays, lines, and line segments", "description": "Draw rays, lines, and line segments with given points. \u00a0Create parallel and perpendicular lines.", "slug": "drawing-lines", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's draw points, lines, line segments, and rays. We'll also think about perpendicular and parallel lines and identify these in two-dimensional figures.\n\nCommon Core Standard: 4.G.A.1", "node_slug": "basic-geo-lines-rays-angles", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-lines/basic-geo-lines-rays-angles", "extended_slug": "math/basic-geo/basic-geo-lines/basic-geo-lines-rays-angles", "kind": "Topic", "slug": "basic-geo-lines-rays-angles"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-lines/basic-geo-measuring-segments/", "id": "basic-geo-measuring-segments", "hide": false, "title": "Measuring segments", "child_data": [{"kind": "Video", "id": "611259516"}, {"kind": "Video", "id": "xc6f1d2f0"}, {"kind": "Exercise", "id": "701990088"}, {"kind": "Video", "id": "xa1695c23"}, {"kind": "Exercise", "id": "701911238"}], "children": [{"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-measuring-segments/language-and-notation-of-basic-geometry/", "id": "il0EJrY64qE", "title": "Basic geometry: language and labels", "kind": "Video", "description": "Before learning any new concept (mathematical or otherwise), it's important we learn and use a common language and label concepts consistently.", "slug": "language-and-notation-of-basic-geometry"}, {"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-measuring-segments/measuring-segments/", "id": "y-O_B-wWivQ", "title": "Measuring Line Segments", "kind": "Video", "description": "In this example of measuring a line segment, the numbers span across the positive and negative. Remember, line segments and points are the foundations of geometry, so this is an important concept.", "slug": "measuring-segments"}, {"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-measuring-segments/measuring_segments/", "id": "measuring_segments", "title": "Measuring segments", "slug": "measuring_segments", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-measuring-segments/congruent-segments/", "id": "bJF9R8_-0O0", "title": "Congruent line segments", "kind": "Video", "description": "Let's take line segments a little further. How do we know if line segments are congruent? Let's watch this example of counting points to see if they have the exact same length.", "slug": "congruent-segments"}, {"path": "khan/math/basic-geo/basic-geo-lines/basic-geo-measuring-segments/congruent_segments/", "id": "congruent_segments", "title": "Congruent segments", "slug": "congruent_segments", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Using a number line, let's learn how we measure segments.", "node_slug": "basic-geo-measuring-segments", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-lines/basic-geo-measuring-segments", "extended_slug": "math/basic-geo/basic-geo-lines/basic-geo-measuring-segments", "kind": "Topic", "slug": "basic-geo-measuring-segments"}], "in_knowledge_map": false, "description": "Lines, line segments, and rays are fundamental to geometry. Our mission: learn what they are and how to use them.", "node_slug": "basic-geo-lines", "render_type": "Topic", "topic_page_url": "/math/basic-geo/basic-geo-lines", "extended_slug": "math/basic-geo/basic-geo-lines", "kind": "Topic", "slug": "basic-geo-lines"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-angles/", "id": "basic-geo-angles", "hide": false, "title": "Angles", "child_data": [{"kind": "Topic", "id": "x4b5256e3"}, {"kind": "Topic", "id": "xa27d1ff9"}, {"kind": "Topic", "id": "x78258bb5"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/", "id": "basic-geo-angle-basics", "hide": false, "title": "Angle basics", "child_data": [{"kind": "Video", "id": "263439065"}, {"kind": "Video", "id": "x66f2a779"}, {"kind": "Exercise", "id": "xb0dd2ccf"}, {"kind": "Video", "id": "x15cb233f"}, {"kind": "Video", "id": "263439060"}, {"kind": "Video", "id": "263439062"}, {"kind": "Video", "id": "211177356"}, {"kind": "Exercise", "id": "196064396"}, {"kind": "Video", "id": "xb6f10aaa"}, {"kind": "Exercise", "id": "x6bc79072"}], "children": [{"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/angle-basics/", "id": "H-de6Tkxej8", "title": "Angle basics", "kind": "Video", "description": "The naming of an angle is related to the line segments that create it. We'll also learn about the angle's vertex. Come on. Let's do this.", "slug": "angle-basics"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/naming-angles/", "id": "6vRgqB0PSXE", "title": "Naming angles exercise example", "kind": "Video", "description": "Here's an example exercise in which we find the correct angle name(s).", "slug": "naming-angles"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/naming-angles_1/", "id": "naming-angles", "title": "Naming angles", "description": "Name angles by their vertex, endpoints, or labels.", "slug": "naming-angles_1", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/angle-measurement-and-circle-arcs/", "id": "D-EIh7NJvtQ", "title": "Angle measurement and circle arcs", "kind": "Video", "description": "Did you know that the measurement of an angle is realted to the arc of a circle? Yes, indeed! Watch.", "slug": "angle-measurement-and-circle-arcs"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/measuring-angles-in-degrees/", "id": "92aLiyeQj0w", "title": "Measuring angles in degrees", "kind": "Video", "description": "Let's come up with an exact way to measure an angle using a protractor. We'll also learn about acute angles. Not to be confused with augly angles :)", "slug": "measuring-angles-in-degrees"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/using-a-protractor/", "id": "dw41PMWek6U", "title": "Measuring angles using a protractor", "kind": "Video", "description": "Let's use our virtual protractor to measure some angles together, shall we?", "slug": "using-a-protractor"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/measuring-angles/", "id": "wJ37GJyViU8", "title": "More angle measurements using a protractor", "kind": "Video", "description": "We're practicing measuring angles using the virtual protractor. Do this a few times with us and you'll use a real protractor like a pro!", "slug": "measuring-angles"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/measuring_angles/", "id": "measuring_angles", "title": "Measuring angles", "description": "Measure angles using a protractor.", "slug": "measuring_angles", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/constructing-angles/", "id": "QmfoIvgIVlE", "title": "Constructing angles", "kind": "Video", "description": "As opposed to measuring an angle using a protractor, in this example we're constructing an angle. Same idea here, just a slightly different application. You got this.", "slug": "constructing-angles"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-basics/drawing-angles/", "id": "drawing-angles", "title": "Drawing angles", "description": "Use a protractor to construct angles.", "slug": "drawing-angles", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What is an angle and how do we label, measure and construct them?\n\nCommon Core Standards: 4.MD.C.5, 4.MD.C.5a, 4.MD.C.5b, 4.MD.C.6, 4.MD.C.7, 4.G.A.1", "node_slug": "basic-geo-angle-basics", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-angles/basic-geo-angle-basics", "extended_slug": "math/basic-geo/basic-geo-angles/basic-geo-angle-basics", "kind": "Topic", "slug": "basic-geo-angle-basics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/", "id": "basic-geo-interpreting-angles", "hide": false, "title": "Interpreting angles", "child_data": [{"kind": "Video", "id": "60129393"}, {"kind": "Video", "id": "263439060"}, {"kind": "Exercise", "id": "47757395"}, {"kind": "Video", "id": "x1781a3d6"}, {"kind": "Exercise", "id": "x3958fbe6"}, {"kind": "Video", "id": "x93c8f042"}, {"kind": "Exercise", "id": "x0b7cb620"}, {"kind": "Video", "id": "xd505def0"}, {"kind": "Exercise", "id": "x0dc914cc"}, {"kind": "Video", "id": "xe3c54f14"}, {"kind": "Video", "id": "372432667"}, {"kind": "Exercise", "id": "xc23bbfaa"}, {"kind": "Video", "id": "x6c2451f9"}, {"kind": "Exercise", "id": "x353bd6f4"}], "children": [{"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/acute-right-and-obtuse-angles/", "id": "ALhv3Rlydig", "title": "Acute right and obtuse angles", "kind": "Video", "description": "We briefly discussed the types of angles in the last tutorial but we'll delve a little deeper into acute, obtuse, and right angles here.", "slug": "acute-right-and-obtuse-angles"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/measuring-angles-in-degrees/", "id": "92aLiyeQj0w", "title": "Measuring angles in degrees", "kind": "Video", "description": "Let's come up with an exact way to measure an angle using a protractor. We'll also learn about acute angles. Not to be confused with augly angles :)", "slug": "measuring-angles-in-degrees"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/angle_types/", "id": "angle_types", "title": "Angle types", "description": "Determine if an angle is acute, right, or obtuse. \u00a0A protractor is provided.", "slug": "angle_types", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/recognizing-angles-examples/", "id": "B0R3MJOrST0", "title": "Recognizing angles", "kind": "Video", "description": "Let's do a few example exercises in which you recognize and identify the type of given angle. This is a lot of fun!", "slug": "recognizing-angles-examples"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/recognizing-angles/", "id": "recognizing-angles", "title": "Recognizing angles", "description": "Determine if angles in shapes and pictures are acute, right, or obtuse.", "slug": "recognizing-angles", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/drawing-acute-right-and-obtuse-angles/", "id": "4ZyTVTGVPgE", "title": "Drawing acute, right and obtuse angles", "kind": "Video", "description": "These 3 types of angles will often come up in your geometry studies. Let's make sure you know how to draw an acute, obtuse, and right angle.", "slug": "drawing-acute-right-and-obtuse-angles"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/drawing-right-acute-and-obtuse-angles/", "id": "drawing-right--acute--and-obtuse-angles", "title": "Drawing right, acute, and obtuse angles", "description": "Create an acute, right, or obtuse angle using a given vertex.", "slug": "drawing-right-acute-and-obtuse-angles", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/angle-sense-example/", "id": "2mzuFKCuDg4", "title": "Identify the angle example", "kind": "Video", "description": "We're matching the visual angle with the corresponding angle measure. Great practice. See if you do it on your own before listening to Sal!", "slug": "angle-sense-example"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/benchmark-angles/", "id": "benchmark-angles", "title": "Benchmark angles", "description": "Estimate the size of angles when given a picture or a situation.", "slug": "benchmark-angles", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/parallel-and-perpendicular-lines-intro/", "id": "V0xounKGEXs", "title": "Parallel and perpendicular lines intro", "kind": "Video", "description": "Do the two lines intersect or stay apart? If they intersect, do they do so thereby creating a 90 degree angle? These are the kinds of questions we ask ourselves when we learn about parallel and perpendicular lines.", "slug": "parallel-and-perpendicular-lines-intro"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/identifying-parallel-and-perpendicular-lines/", "id": "aq_XL6FrmGs", "title": "Identifying parallel and perpendicular lines", "kind": "Video", "description": "Let's now apply what we learned and do an exercise together in which we identify parallel and perpendicular lines.This is great practice.", "slug": "identifying-parallel-and-perpendicular-lines"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/recognizing-parallel-and-perpendicular-lines/", "id": "recognizing-parallel-and-perpendicular-lines", "title": "Recognizing parallel and perpendicular lines", "description": "Identify parallel and perpendicular lines in geometric figures and pictures.", "slug": "recognizing-parallel-and-perpendicular-lines", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/decomposing-angles/", "id": "M7NVKImDqGg", "title": "Solving for an angle", "kind": "Video", "description": "Let's use a little math with our geometry and see if we can solve for a mystery angle. In this example we know the adjacent angle AND the combination of the mystery angle and the adjacent angle. Mystery angle...how big are you?", "slug": "decomposing-angles"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles/decomposing-angles_1/", "id": "decomposing-angles", "title": "Decomposing angles", "description": "Find an angle's measure when given the measure's of its parts.", "slug": "decomposing-angles_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Now that we know what angles are, let's dig a bit deeper and classify them and understand their properties a bit better.\n\nCommon Core Standards: 4.MD.C.7, 4.G.A.1", "node_slug": "basic-geo-interpreting-angles", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles", "extended_slug": "math/basic-geo/basic-geo-angles/basic-geo-interpreting-angles", "kind": "Topic", "slug": "basic-geo-interpreting-angles"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships/", "id": "basic-geo-angle-relationships", "hide": false, "title": "Relationships between angles", "child_data": [{"kind": "Video", "id": "263439064"}, {"kind": "Exercise", "id": "47799044"}, {"kind": "Video", "id": "263439063"}, {"kind": "Exercise", "id": "265340597"}, {"kind": "Video", "id": "263439061"}, {"kind": "Video", "id": "372432667"}, {"kind": "Video", "id": "xc5b28d56"}, {"kind": "Exercise", "id": "844384906"}, {"kind": "Exercise", "id": "272338869"}], "children": [{"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships/complementary-and-supplementary-angles/", "id": "BTnAlNSgNsY", "title": "Complementary and supplementary angles", "kind": "Video", "description": "Let's add some tools to our geometry tool belt. Here's a thorough explanation of complementary and supplementary angles, as well as definitions of adjacent and straight angles.", "slug": "complementary-and-supplementary-angles"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships/complementary_and_supplementary_angles/", "id": "complementary_and_supplementary_angles", "title": "Complementary and supplementary angles", "slug": "complementary_and_supplementary_angles", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships/angles-at-the-intersection-of-two-lines/", "id": "_7aUxFzTG5w", "title": "Introduction to vertical angles", "kind": "Video", "description": "By using our knowledge of supplementary, adjacent, and vertical angles, we can solve problems involving the intersection of two lines. Including this one!", "slug": "angles-at-the-intersection-of-two-lines"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships/vertical_angles/", "id": "vertical_angles", "title": "Vertical angles", "slug": "vertical_angles", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships/angles-formed-by-parallel-lines-and-transversals/", "id": "H-E5rlpCVu4", "title": "Angles formed by parallel lines and transversals", "kind": "Video", "description": "Parallel lines, transversal lines, corresponding angles", "slug": "angles-formed-by-parallel-lines-and-transversals"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships/identifying-parallel-and-perpendicular-lines/", "id": "aq_XL6FrmGs", "title": "Identifying parallel and perpendicular lines", "kind": "Video", "description": "Let's now apply what we learned and do an exercise together in which we identify parallel and perpendicular lines.This is great practice.", "slug": "identifying-parallel-and-perpendicular-lines"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships/figuring-out-angles-between-transversal-and-parallel-lines/", "id": "2WjGD3LZEWo", "title": "Figuring out angles between transversal and parallel lines", "kind": "Video", "slug": "figuring-out-angles-between-transversal-and-parallel-lines"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships/congruent_angles/", "id": "congruent_angles", "title": "Congruent angles", "description": "Determine which angles must be congruent when parallel lines are crossed by a transversal.", "slug": "congruent_angles", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships/parallel_lines_1/", "id": "parallel_lines_1", "title": "Parallel lines 1", "slug": "parallel_lines_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's complement and supplement our knowledge of angles with some new geometry vocabulary. In this group of tutorials you'll learn about complementary, supplementary, vertical, adjacent, and straight angles. You'll quickly realize that the relationship bewten each of the angle types is quite logical and solving problems involving intersecting lines is a snap. Onward! Common Core Standards: 7.G.B.5", "node_slug": "basic-geo-angle-relationships", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-angles/basic-geo-angle-relationships", "extended_slug": "math/basic-geo/basic-geo-angles/basic-geo-angle-relationships", "kind": "Topic", "slug": "basic-geo-angle-relationships"}], "in_knowledge_map": false, "description": "Measure angles and find missing angles in interesting geometry problems.", "node_slug": "basic-geo-angles", "render_type": "Topic", "topic_page_url": "/math/basic-geo/basic-geo-angles", "extended_slug": "math/basic-geo/basic-geo-angles", "kind": "Topic", "slug": "basic-geo-angles"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-shapes/", "id": "basic-geo-shapes", "hide": false, "title": "Shapes", "child_data": [{"kind": "Topic", "id": "x1f4788cc"}, {"kind": "Topic", "id": "x50997cfc"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/", "id": "basic-geo-classifying-shapes", "hide": false, "title": "Classifying shapes", "child_data": [{"kind": "Video", "id": "339557900"}, {"kind": "Video", "id": "370305272"}, {"kind": "Video", "id": "x1b577232"}, {"kind": "Video", "id": "x819465b4"}, {"kind": "Exercise", "id": "251616813"}, {"kind": "Video", "id": "xdb593bbc"}, {"kind": "Video", "id": "x7eb84d3e"}, {"kind": "Video", "id": "x3fd4b56d"}, {"kind": "Exercise", "id": "xe0848d0d"}, {"kind": "Video", "id": "xe37249c4"}, {"kind": "Exercise", "id": "xf1dc0080"}, {"kind": "Exercise", "id": "xa92f72a2"}, {"kind": "Video", "id": "x32882801"}, {"kind": "Video", "id": "x78b40eae"}, {"kind": "Exercise", "id": "310282900"}], "children": [{"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/quadrilateral-overview/", "id": "Ka82QC4QvGA", "title": "Quadrilateral overview", "kind": "Video", "description": "\"Quad\" means \"four\" and \"lateral\" means \"line.\" A quadrilateral is literally a shape with four sides (lines) and four angles. Let's learn the difference between concave and convex quadrilaterals as well as trapezoids, parallelograms, and rhombi.", "slug": "quadrilateral-overview"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/quadrilateral-properties/", "id": "5CeBlu260Rw", "title": "Quadrilateral properties", "kind": "Video", "description": "How about this: we are given a 4-sided shape and asked to determine whether its properties qualify it to be called a quadrilateral (or category of quadrilaterals). Check it out.", "slug": "quadrilateral-properties"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/kites-as-a-mathematical-shape/", "id": "inlMrf2d-k4", "title": "Quadrilaterals: kites as a geometric shape", "kind": "Video", "description": "Is a kite a quadrilateral? Is it a rhombus? A parallelogram? Let's find out.", "slug": "kites-as-a-mathematical-shape"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/quadrilateral-types-exercise/", "id": "wPZIa3SjPF0", "title": "Quadrilaterals: find the type exercise", "kind": "Video", "description": "Take a look at the given data and determine what type of quadrilateral we have.", "slug": "quadrilateral-types-exercise"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/quadrilateral_types/", "id": "quadrilateral_types", "title": "Quadrilateral types", "description": "Identify quadrilaterals based on pictures or attributes. \u00a0Quadrilaterals included are parallelograms, rhombuses, rectangles, and squares.", "slug": "quadrilateral_types", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/scalene-isosceles-equilateral-acute-right-obtuse/", "id": "D5lZ3thuEeA", "title": "Triangles: categorization by angle or equal sides.", "kind": "Video", "description": "Scalene, isosceles, equilateral, acute, right, obtuse. All are types of triangles but what makes them special depends on the method of categorization. Watch this outstanding explanation.", "slug": "scalene-isosceles-equilateral-acute-right-obtuse"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/scalene-isosceles-equilateral-from-angle/", "id": "sZMezOCZr40", "title": "Triangles: using angles to categorize", "kind": "Video", "description": "You say you can't categorize a triangle because you don't know the length of the sides. Guess what? If you know the size of the angles you can!", "slug": "scalene-isosceles-equilateral-from-angle"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/recog-triangles-example/", "id": "NRS2ZJVVzOI", "title": "Categorizing triangles", "kind": "Video", "description": "Let's practice categorizing triangles in this example exercise.", "slug": "recog-triangles-example"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/recognizing-triangles/", "id": "recognizing-triangles", "title": "Recognizing triangle types", "description": "Identify triangles by their angles as acute, right, or obtuse. \u00a0Identify triangles by their side-lengths as equilateral, isosceles, or scalene.", "slug": "recognizing-triangles", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/classifying-shapes-examples/", "id": "PiQxA9O7Rd8", "title": "Categorizing geometric shapes: practice examples", "kind": "Video", "description": "Watch and do these example exercises along with us. Remember what you have learned about perpendicular lines, right, obtuse, and acute triangles.", "slug": "classifying-shapes-examples"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/classifying-shapes-by-line-and-angle-types/", "id": "classifying-shapes-by-line-and-angle-types", "title": "Classifying shapes by line and angle types", "description": "Classify shapes based on pictures or attributes, such as angle types and side-lengths.", "slug": "classifying-shapes-by-line-and-angle-types", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/properties-of-shapes/", "id": "properties-of-shapes", "title": "Properties of shapes", "description": "Identify and compare shapes based on their attributes. \u00a0Shapes include triangle types, quadrilateral types, pentagons, and hexagons.", "slug": "properties-of-shapes", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/classifying-shapes/", "id": "1pHhMX0_4Bw", "title": "Quadrilaterals: classifying shapes", "kind": "Video", "description": "Let's see how well you classify shapes by determining what properties match each kind of quadrilateral.", "slug": "classifying-shapes"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/axis-of-symmetry/", "id": "LrTn4cvsewk", "title": "Introduction to reflective symmetry", "kind": "Video", "description": "Sal introduces the concept of an \"axis of symmetry.\"", "slug": "axis-of-symmetry"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes/axis_of_symmetry/", "id": "axis_of_symmetry", "title": "Axis of symmetry", "description": "Draw and identify lines of symmetry. \u00a0Create and identify symmetrical shapes.", "slug": "axis_of_symmetry", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we'll classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. We'll also learn about special triangles called \"right triangles\".\n\nCommon Core Standard: 4.G.A.2", "node_slug": "basic-geo-classifying-shapes", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes", "extended_slug": "math/basic-geo/basic-geo-shapes/basic-geo-classifying-shapes", "kind": "Topic", "slug": "basic-geo-classifying-shapes"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/", "id": "basic-geo-finding-angles", "hide": false, "title": "Finding angles in shapes", "child_data": [{"kind": "Video", "id": "265540637"}, {"kind": "Video", "id": "265540642"}, {"kind": "Video", "id": "265540638"}, {"kind": "Video", "id": "265540640"}, {"kind": "Video", "id": "265540635"}, {"kind": "Exercise", "id": "251591675"}, {"kind": "Video", "id": "265540639"}, {"kind": "Exercise", "id": "2023"}, {"kind": "Exercise", "id": "2024"}, {"kind": "Video", "id": "348974657"}, {"kind": "Exercise", "id": "251658143"}], "children": [{"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/proof-sum-of-measures-of-angles-in-a-triangle-are-180/", "id": "6s1CI3uuhko", "title": "Proof: Measures of interior angles of a triangle sum to 180\u00b0", "kind": "Video", "description": "Sal gives a formal proof that the\u00a0measures of interior angles of a triangle sum to 180\u00b0.", "slug": "proof-sum-of-measures-of-angles-in-a-triangle-are-180"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/triangle-angle-example-1/", "id": "hmj3_zbz2eg", "title": "Triangle angle example 1", "kind": "Video", "description": "Figuring out angles in a triangle. A little about exterior angles being the sum of the remote interior angles", "slug": "triangle-angle-example-1"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/triangle-angle-example-2/", "id": "eTwnt4G5xE4", "title": "Triangle angle example 2", "kind": "Video", "description": "Another example finding angles in triangles", "slug": "triangle-angle-example-2"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/triangle-angle-example-3/", "id": "iqeGTtyzQ1I", "title": "Triangle angle example 3", "kind": "Video", "description": "Multiple ways to solve for the angles of multiple triangles", "slug": "triangle-angle-example-3"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/challenging-triangle-angle-problem/", "id": "95logvV8nXY", "title": "Challenging triangle angle problem", "kind": "Video", "description": "Interesting problem finding the sums of particular exterior angles of an irregular pentagon", "slug": "challenging-triangle-angle-problem"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/triangle_angles_1/", "id": "triangle_angles_1", "title": "Find missing angles of triangles", "description": "Find missing angle measures in triangles using the properties of general triangles, isosceles triangles, and equilateral triangles.", "slug": "triangle_angles_1", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/finding-more-angles/", "id": "0gzSreH8nUI", "title": "Finding more angles", "kind": "Video", "description": "Example of angle hunting!", "slug": "finding-more-angles"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/angles_1/", "id": "angles_1", "title": "Finding angle measures 1", "slug": "angles_1", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/angles_2/", "id": "angles_2", "title": "Finding angle measures 2", "slug": "angles_2", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/proof-opposite-angles-of-parallelogram-congruent/", "id": "oIV1zM8qlpk", "title": "Proof: Opposite angles of parallelogram are congruent", "kind": "Video", "description": "Sal proves that opposite angles of a parallelogram are congruent.", "slug": "proof-opposite-angles-of-parallelogram-congruent"}, {"path": "khan/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles/quadrilateral_angles/", "id": "quadrilateral_angles", "title": "Quadrilateral angles", "slug": "quadrilateral_angles", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Do the angles in a triangle always add up to the same thing? Would I ask it if they didn't? What do we know about the angles of a triangle if two of the sides are congruent (an isosceles triangle) or all three are congruent (an equilateral)? This tutorial is the place to find out.\n\nCommon Core Standard: 8.G.A.5", "node_slug": "basic-geo-finding-angles", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-shapes/basic-geo-finding-angles", "extended_slug": "math/basic-geo/basic-geo-shapes/basic-geo-finding-angles", "kind": "Topic", "slug": "basic-geo-finding-angles"}], "in_knowledge_map": false, "description": "Classify shapes and solve geometry problems using what we know of the properties of shapes.", "node_slug": "basic-geo-shapes", "render_type": "Topic", "topic_page_url": "/math/basic-geo/basic-geo-shapes", "extended_slug": "math/basic-geo/basic-geo-shapes", "kind": "Topic", "slug": "basic-geo-shapes"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-coordinate-plane/", "id": "basic-geo-coordinate-plane", "hide": false, "title": "The coordinate plane", "child_data": [{"kind": "Topic", "id": "xe27e79b8"}, {"kind": "Topic", "id": "xe86cbb1d"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/", "id": "copy-of-cc-6th-coordinate-plane", "hide": false, "title": "Coordinate plane", "child_data": [{"kind": "Video", "id": "23630"}, {"kind": "Video", "id": "xba8b84ab"}, {"kind": "Exercise", "id": "2016"}, {"kind": "Video", "id": "x4eee6cc3"}, {"kind": "Exercise", "id": "xcb17d9e9"}, {"kind": "Video", "id": "33752747"}, {"kind": "Video", "id": "x02167ace"}, {"kind": "Exercise", "id": "342773513"}, {"kind": "Video", "id": "x08d09f9d"}, {"kind": "Exercise", "id": "702001212"}, {"kind": "Video", "id": "x52229838"}, {"kind": "Exercise", "id": "x9f1166e7"}, {"kind": "Video", "id": "x1d9ac087"}, {"kind": "Exercise", "id": "x1d5815bc"}], "children": [{"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/the-coordinate-plane/", "id": "VhNkWdLGpmA", "title": "Coordinate plane examples", "kind": "Video", "description": "Let's get familiar with the x/y coordinate plane, both from the perspective of plotting points and interpreting the placement of points on a plane.", "slug": "the-coordinate-plane"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/graphing-points-exercise/", "id": "4vNloi-zNjU", "title": "Coordinate plane: graphing points", "kind": "Video", "description": "This exercise asks us to graph a set of points from an ordered pair on the x and y axis of a coordinate plane.", "slug": "graphing-points-exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/graphing_points/", "id": "graphing_points", "title": "Graphing points", "description": "Plot a given point on the coordinate plane.", "slug": "graphing_points", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/coordinate-plane-word-problem-example/", "id": "_QKR8I5VE-w", "title": "Coordinate plane: graphing points word problem", "kind": "Video", "description": "Naomi needs some help counting the number of blocks she walks from home to school. We'll use the coordinate plane to graph it out first. Let's go.", "slug": "coordinate-plane-word-problem-example"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/coordinate-plane-word-problems-in-the-first-quadrant/", "id": "coordinate-plane-word-problems-in-the-first-quadrant", "title": "Coordinate plane word problems in the first quadrant", "description": "Find the distance between points, graph points, and interpret data on coordinate planes to solve word problems.", "slug": "coordinate-plane-word-problems-in-the-first-quadrant", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/quadrants-of-coordinate-plane/", "id": "1op92ojA6q0", "title": "Coordinate plane: quadrants", "kind": "Video", "description": "You like dividing up a pizza into slices? In geometry, we slice up the coordinate plane into quadrants. Although these are more like squares than triangular pizza slices! Let's learn about them.", "slug": "quadrants-of-coordinate-plane"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/graphing-points-and-naming-quadrants-exercise/", "id": "Jeh5vudjmLI", "title": "Coordinate plane: graphing points and naming quadrants", "kind": "Video", "description": "This is a great exercise example in which we plot the ordered pair and then identify which quadrant the point lies. You'll get the hang of this quickly!", "slug": "graphing-points-and-naming-quadrants-exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/graphing_points_2/", "id": "graphing_points_2", "title": "Graphing points and naming quadrants", "description": "Practice graphing points and identifying which quadrants they're in.", "slug": "graphing_points_2", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/points-on-the-coordinate-plane/", "id": "b9H22F0Qbgw", "title": "Coordinate plane: have all the points been graphed?", "kind": "Video", "description": "Some of the given ordered pairs are already graphed on the coordinate pane in this example, but not all of them. Can you tell which haven't?", "slug": "points-on-the-coordinate-plane"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/identifying_points_1/", "id": "identifying_points_1", "title": "Points on the coordinate plane", "description": "Practice plotting points using an xy coordinate system. The cooridnates of the points in these problems may be negative.", "slug": "identifying_points_1", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/coordinate-plane-word-problems-exercise/", "id": "PC_FoyewoIs", "title": "Coordinate plane: word problem exercise", "kind": "Video", "description": "In this word problem, we need to plot the ordered pairs and then figure out the difference in the y coodinate between the two. This will give us our answer!", "slug": "coordinate-plane-word-problems-exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/coordinate-plane-word-problems/", "id": "coordinate-plane-word-problems", "title": "Coordinate plane problems in all four quadrants", "description": "Practice solving word problems by interpreting the meaning of points plotted on an xy coordinate system.", "slug": "coordinate-plane-word-problems", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/reflecting-points-exercise/", "id": "INqaHHZGt8w", "title": "Coordinate plane: reflecting points", "kind": "Video", "description": "Just like looking at a mirror image of yourself, but flipped....a reflection point is the mirror point on the opposite axis. Watch this tutorial and reflect :)", "slug": "reflecting-points-exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/reflecting-points/", "id": "reflecting-points", "title": "Reflecting points on the coordinate plane", "description": "Practice reflecting points across axes on the xy coordinate plane.", "slug": "reflecting-points", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We first explored the coordinate plane in the 5th grade. But that was only dealing with positive coordinate. Now, however, we know all about negative numbers so why not have negative coordinates as well!\n\nCommon Core Standards: 6.NS.C.6, 6.NS.C.6b, 6.NS.C.6c, 6.NS.C.8", "node_slug": "copy-of-cc-6th-coordinate-plane", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane", "extended_slug": "math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane", "kind": "Topic", "slug": "copy-of-cc-6th-coordinate-plane"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-coordinate-plane/basic-geo-shapes-on-a-plane/", "id": "basic-geo-shapes-on-a-plane", "hide": false, "title": "Shapes on the coordinate plane", "child_data": [{"kind": "Video", "id": "x249c50c5"}, {"kind": "Exercise", "id": "x6fe7dd73"}, {"kind": "Video", "id": "xd2b8209a"}, {"kind": "Exercise", "id": "xf0293235"}, {"kind": "Exercise", "id": "xd6d728fb"}], "children": [{"path": "khan/math/basic-geo/basic-geo-coordinate-plane/basic-geo-shapes-on-a-plane/analyzing-polygon-on-the-coordinate-plane/", "id": "8ToCxaB7EOE", "title": "Parallelogram on the coordinate plane", "kind": "Video", "description": "Remember our discussion of the coordinate plane? Sure you do! Let's graph the given coordinates of three of the polygon vertices, and find where the 4th vertex is.", "slug": "analyzing-polygon-on-the-coordinate-plane"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/basic-geo-shapes-on-a-plane/polygons-in-the-coordinate-plane/", "id": "polygons-in-the-coordinate-plane", "title": "Quadrilateral problems on the coordinate plane", "description": "Challenge problems involving the coordinates of the vertices of the quadrilaterals", "slug": "polygons-in-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/basic-geo-shapes-on-a-plane/constructing-polygon-on-coordinate-plane-example/", "id": "zxy4KAiSPIc", "title": "Drawing a quadrilateral on the coordinate plane example", "kind": "Video", "description": "Sal draws a quadrilateral on the coordinate plane using the coordinates of its vertices.", "slug": "constructing-polygon-on-coordinate-plane-example"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/basic-geo-shapes-on-a-plane/drawing-polygons/", "id": "drawing-polygons", "title": "Drawing polygons with coordinates", "description": "Practice drawing shapes on the coordinate plane.", "slug": "drawing-polygons", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-coordinate-plane/basic-geo-shapes-on-a-plane/drawing-polygons-2/", "id": "drawing-polygons-2", "title": "Drawing polygons with coordinates 2", "description": "More challenging problems involving drawing shapes on the coordinate plane.", "slug": "drawing-polygons-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's think about shapes as collections of points on the coordinate plane. When you're done with this tutorial, you might be saying, \"I have had it with these shapes on this plane!\" But you'll be happy you went through it.", "node_slug": "basic-geo-shapes-on-a-plane", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-coordinate-plane/basic-geo-shapes-on-a-plane", "extended_slug": "math/basic-geo/basic-geo-coordinate-plane/basic-geo-shapes-on-a-plane", "kind": "Topic", "slug": "basic-geo-shapes-on-a-plane"}], "in_knowledge_map": false, "description": "We use coordinates to describe where something is. In geometry, coordinates say where points are on a grid we call the \"coordinate plane\".", "node_slug": "basic-geo-coordinate-plane", "render_type": "Topic", "topic_page_url": "/math/basic-geo/basic-geo-coordinate-plane", "extended_slug": "math/basic-geo/basic-geo-coordinate-plane", "kind": "Topic", "slug": "basic-geo-coordinate-plane"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-area-perimeter/", "id": "basic-geo-area-perimeter", "hide": false, "title": "Area and perimeter", "child_data": [{"kind": "Topic", "id": "xd11c48d8"}, {"kind": "Topic", "id": "xbe350820"}, {"kind": "Topic", "id": "x3309c52e"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/", "id": "basic-geo-area-perimeter-polygon", "hide": false, "title": "Area and perimeter of polygons", "child_data": [{"kind": "Video", "id": "283213901"}, {"kind": "Exercise", "id": "840068734"}, {"kind": "Exercise", "id": "xddab0f04"}, {"kind": "Exercise", "id": "x73005801"}, {"kind": "Exercise", "id": "x575b0001"}, {"kind": "Video", "id": "283213902"}, {"kind": "Exercise", "id": "920312137"}, {"kind": "Video", "id": "351468823"}, {"kind": "Exercise", "id": "898971113"}, {"kind": "Video", "id": "x9eb86ee6"}, {"kind": "Video", "id": "xae34441c"}, {"kind": "Exercise", "id": "899013436"}, {"kind": "Video", "id": "x27919a7f"}, {"kind": "Video", "id": "x74fb422f"}, {"kind": "Exercise", "id": "x7145a29c"}, {"kind": "Exercise", "id": "x5df942ac"}, {"kind": "Video", "id": "x995b0cd6"}, {"kind": "Exercise", "id": "xfb0c1229"}], "children": [{"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/perimeter-and-area-basics/", "id": "LoaBd-sPzkU", "title": "Perimeter and area: the basics", "kind": "Video", "description": "Great geometry primer on perimeter and area. Listen carefully. Sal explains the concepts so you'll understand them.", "slug": "perimeter-and-area-basics"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/perimeter_1/", "id": "perimeter_1", "title": "Perimeter 1", "description": "Calculate the perimeter of a shape from its side lengths.", "slug": "perimeter_1", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/perimeter-2/", "id": "perimeter-2", "title": "Perimeter 2", "description": "Find perimeter of figures when given an image or context. \u00a0Find a missing side length for a figure when given the perimeter.", "slug": "perimeter-2", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/finding-area-by-multiplying/", "id": "finding-area-by-multiplying", "title": "Finding area by multiplying", "description": "Find area of rectangles by multiplying side-lengths.", "slug": "finding-area-by-multiplying", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area-and-perimeter-of-rectangles-word-problems/", "id": "area-and-perimeter-of-rectangles-word-problems", "title": "Area and perimeter of rectangles word problems", "description": "Find the missing side length of a rectangle when given its perimeter or area. \u00a0Compare perimeters and areas of rectangles.", "slug": "area-and-perimeter-of-rectangles-word-problems", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/triangle-area-proofs/", "id": "YOYQys52sPs", "title": "Triangle area proofs", "kind": "Video", "description": "Proving that the area of any triangle is 1/2 b x h", "slug": "triangle-area-proofs"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area_of_triangles_1/", "id": "area_of_triangles_1", "title": "Area of triangles", "description": "Practice finding the area of right, acute, and obtuse triangles from a diagram.", "slug": "area_of_triangles_1", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area-of-a-parallelogram/", "id": "tFhBAeZVTMw", "title": "Area of a parallelogram", "kind": "Video", "description": "Guess what's interesting about the opposite sides of a parallelogram? That's right....they are parallel! Let's find the area--base times height", "slug": "area-of-a-parallelogram"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area_of_parallelograms/", "id": "area_of_parallelograms", "title": "Area of parallelograms", "description": "Practice finding the area of parallelograms given base and height.", "slug": "area_of_parallelograms", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area-of-a-trapezoid-1/", "id": "j3-XYLnxJDY", "title": "Area of a trapezoid", "kind": "Video", "description": "A trapezoid is a cousin of the parallelogram. However, in trapezoid only two of the opposing sides are parallel to each other. Here's we explain how to find its area.", "slug": "area-of-a-trapezoid-1"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area-of-a-kite/", "id": "b8q6i_XPyhk", "title": "Area of a kite", "kind": "Video", "description": "Learn how to find the area of a kite. A kite is a type of quadrilateral that is symmetric around one of its diagonals.", "slug": "area-of-a-kite"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/areas_of_trapezoids_rhombi_and_kites/", "id": "areas_of_trapezoids_rhombi_and_kites", "title": "Area of trapezoids", "description": "Practice finding the areas of trapezoids.", "slug": "areas_of_trapezoids_rhombi_and_kites", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area-comparisons/", "id": "MamrTJ7V_Vg", "title": "Finding area by rearranging parts", "kind": "Video", "description": "Sometimes it helps to rearrange the parts of geometric figures to find the area. That's what we're going to do here.", "slug": "area-comparisons"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area-breaking-up-shape/", "id": "loAA3TCNAvU", "title": "Finding area by breaking up the shape", "kind": "Video", "description": "Don't be intimidated by odd looking geometric figures and being asked to find its area. In this example you'll understand that breaking up the figure into smaller geometric shapes that are regular make the task a lot easier.", "slug": "area-breaking-up-shape"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/composing-and-decomposing-shapes/", "id": "composing-and-decomposing-shapes", "title": "Area challenge", "description": "Practice solving problems involving triangles, parallelograms, and composite figures. Exercises include decimals, fractions, and word problems. Area of circles is not included.", "slug": "composing-and-decomposing-shapes", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area-of-triangles-2/", "id": "area-of-triangles-2", "title": "Areas of shapes on grids", "description": "Practice finding the areas of triangles and quadrilaterals on grids.", "slug": "area-of-triangles-2", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area-of-strange-quadrilateral/", "id": "gkifo46--JA", "title": "How to find the area of a strange quadrilateral on a grid", "kind": "Video", "description": "Again, some quadrilaterals can be oddly shaped so break it up into shapes where finding the area is more easily determined.", "slug": "area-of-strange-quadrilateral"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon/area-of-quadrilaterals-and-polygons/", "id": "area-of-quadrilaterals-and-polygons", "title": "Area of composite figures", "description": "Practice finding the areas of complex shapes that are composed of smaller shapes.", "slug": "area-of-quadrilaterals-and-polygons", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's now extend our understanding of area to triangles and more interesting quadrilaterals!\n\nCommon Core Standard: 6.G.A.1", "node_slug": "basic-geo-area-perimeter-polygon", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon", "extended_slug": "math/basic-geo/basic-geo-area-perimeter/basic-geo-area-perimeter-polygon", "kind": "Topic", "slug": "basic-geo-area-perimeter-polygon"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/", "id": "basic-geo-area-circumference", "hide": false, "title": "Area and circumference of circles", "child_data": [{"kind": "Video", "id": "24957"}, {"kind": "Video", "id": "370305280"}, {"kind": "Exercise", "id": "720782619"}, {"kind": "Video", "id": "370305273"}, {"kind": "Exercise", "id": "720935156"}, {"kind": "Video", "id": "x875f3feb"}, {"kind": "Video", "id": "x1f3c3d07"}, {"kind": "Video", "id": "x057e031d"}, {"kind": "Exercise", "id": "x6db5022d"}], "children": [{"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/circles-radius-diameter-and-circumference/", "id": "jyLRpr2P0MQ", "title": "Circles: radius, diameter, circumference and Pi", "kind": "Video", "description": "Learn how the number Pi allows us to relate the radius, diameter, and circumference of a circle.", "slug": "circles-radius-diameter-and-circumference"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/parts-of-a-circle/", "id": "04N79tItPEA", "title": "Labeling parts of a circle", "kind": "Video", "description": "Radius, diameter, center, and circumference--all are parts of a circle. Let's go through each and understand how they are defined.", "slug": "parts-of-a-circle"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/radius_diameter_and_circumference/", "id": "radius_diameter_and_circumference", "title": "Radius, diameter, and circumference", "description": "Practice labeling the parts of a circle: radius, diameter, and circumference.", "slug": "radius_diameter_and_circumference", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/area-of-a-circle/", "id": "ZyOhRgnFmIY", "title": "Area of a circle", "kind": "Video", "description": "In this example, we solve for the area of a circle when given the diameter. If you recall, the diameter is the length of a line that runs across the circle and through the center.", "slug": "area-of-a-circle"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/area_of_a_circle/", "id": "area_of_a_circle", "title": "Area of a circle", "slug": "area_of_a_circle", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/circumference-from-area/", "id": "Rcb7ZUTOQ1I", "title": "Circumference of a circle", "kind": "Video", "description": "Here we find the circumference, the distance around a circle, given the area. We're building on our knowledge of the parts of circle.", "slug": "circumference-from-area"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/area-of-shaded-region/", "id": "gbGghzo7yEM", "title": "Area of a shaded region", "kind": "Video", "description": "Here's a fun one: find the area of a shaded region where you first determine the area of a square and then the area of a circle.", "slug": "area-of-shaded-region"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/radius-change-impact/", "id": "GB9Rqsah2gs", "title": "Impact of a radius change on the area of a circle", "kind": "Video", "description": "If we change the radius of a circle, how does the circumference and area change?", "slug": "radius-change-impact"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/area-and-circumference-of-circles/", "id": "area-and-circumference-of-circles", "title": "Problem solving with area and circumference of circles", "description": "Practice interesting area and circumference problems.", "slug": "area-and-circumference-of-circles", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You already know about area and perimeter of lots of shapes. Now we'll round out those concepts by applying them to circles. Mathematicians call the distance around a circle its circumference and the space inside a circle its area.\n \nIn this tutorial, we'll learn that there's another type of pi in the math world, and it's even more awesome than apple pie. We'll use pi to find the circumference and area of any circle in the world, no matter how big or how small!\n\nCommon Core Standards: 7.G.B.4", "node_slug": "basic-geo-area-circumference", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference", "extended_slug": "math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference", "kind": "Topic", "slug": "basic-geo-area-circumference"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-scale-drawings/", "id": "basic-geo-scale-drawings", "hide": false, "title": "Scale drawings", "child_data": [{"kind": "Video", "id": "x20cf89b2"}, {"kind": "Video", "id": "x6b901e6c"}, {"kind": "Exercise", "id": "xbe226bed"}, {"kind": "Video", "id": "xb773c610"}, {"kind": "Exercise", "id": "x9c008d17"}], "children": [{"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-scale-drawings/scale-drawings-example/", "id": "byjmR7JBXKc", "title": "Interpreting a scale drawing", "kind": "Video", "description": "Understand how a scale drawing is converted into real numbers using the scale factor.", "slug": "scale-drawings-example"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-scale-drawings/scale-drawing-example-2/", "id": "EgOyJJxuuP8", "title": "Solve a scale drawing word problem", "kind": "Video", "description": "See how we solve a word problem by using a scale drawing and finding the scale factor.", "slug": "scale-drawing-example-2"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-scale-drawings/interpreting-scale-drawings/", "id": "interpreting-scale-drawings", "title": "Interpreting scale drawings", "slug": "interpreting-scale-drawings", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-scale-drawings/constructing-scale-drawings/", "id": "f-gCYOCFMYc", "title": "How to make a scale drawing", "kind": "Video", "description": "An urban planner needs your help in creating a scale drawing. Let's use our knowledge about scale factor, length, and area to assist.", "slug": "constructing-scale-drawings"}, {"path": "khan/math/basic-geo/basic-geo-area-perimeter/basic-geo-scale-drawings/constructing-scale-drawings_1/", "id": "constructing-scale-drawings", "title": "Constructing scale drawings", "description": "An urban planner needs your help in creating a scale drawing. Let's use our knowledge about scale factor, length, and area to assist.", "slug": "constructing-scale-drawings_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Now that you understand lines, you can put lines together to create drawings. A scale drawing depicts an actual object that has been reduced (or enlarged) by a certain amount. The \"scale\" shows the relationship between those two sizes. After this set of tutorials, you can draw your bedroom \"to scale\" and practice rearranging your furniture!", "node_slug": "basic-geo-scale-drawings", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-area-perimeter/basic-geo-scale-drawings", "extended_slug": "math/basic-geo/basic-geo-area-perimeter/basic-geo-scale-drawings", "kind": "Topic", "slug": "basic-geo-scale-drawings"}], "in_knowledge_map": false, "description": "Area and perimeter help us measure the size of 2D shapes. We\u2019ll start with the area and perimeter of rectangles. From there, we\u2019ll tackle trickier shapes, such as triangles and circles.", "node_slug": "basic-geo-area-perimeter", "render_type": "Topic", "topic_page_url": "/math/basic-geo/basic-geo-area-perimeter", "extended_slug": "math/basic-geo/basic-geo-area-perimeter", "kind": "Topic", "slug": "basic-geo-area-perimeter"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-volume-surface-area/", "id": "basic-geo-volume-surface-area", "hide": false, "title": "Volume and surface area", "child_data": [{"kind": "Topic", "id": "xf9e48275"}, {"kind": "Topic", "id": "x2083ed1b"}, {"kind": "Topic", "id": "xb6ade3c5"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volume/", "id": "basic-geo-volume", "hide": false, "title": "Volume of prisms", "child_data": [{"kind": "Video", "id": "x5c1fce1f"}, {"kind": "Exercise", "id": "x7ac21e11"}, {"kind": "Video", "id": "xc603bd0d"}, {"kind": "Exercise", "id": "x94e3ecea"}, {"kind": "Video", "id": "xa72132ec"}, {"kind": "Video", "id": "60129394"}, {"kind": "Exercise", "id": "xd94fe24c"}], "children": [{"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volume/volume-of-a-rectangular-prism-with-fractional-dimensions/", "id": "EJTPGyWqhqc", "title": "Volume of a rectangular prism: fractional dimensions", "kind": "Video", "description": "Learn how to find the volume of a rectangular prism that has fractional side lengths. The prism in this video has dimensions 3/5 by 1 1/6 by 3/7.", "slug": "volume-of-a-rectangular-prism-with-fractional-dimensions"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volume/volume_with_fractions/", "id": "volume_with_fractions", "title": "Volume with fractions", "description": "Practice finding the volume of rectangular prisms that have fractional side lengths.", "slug": "volume_with_fractions", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volume/volume-of-a-rectangular-prism-with-fractional-cubes/", "id": "tVDslyeLefU", "title": "Volume of a rectangular prism: fractional cubes", "kind": "Video", "description": "Another way of finding the volume of a rectangular prism involves dividing it into fractional cubes, finding the volume of one, and then multiplying that area by the number of cubes that fit into our rectangular prism.", "slug": "volume-of-a-rectangular-prism-with-fractional-cubes"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volume/volume_with_unit_cubes_2/", "id": "volume_with_unit_cubes_2", "title": "Volume with unit cubes 2", "description": "Practice using fractional unit cubes to find the volume of rectangular prisms.", "slug": "volume_with_unit_cubes_2", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volume/marbles-in-tank-volume/", "id": "CCysGY2cXUo", "title": "Volume of a rectangular prism: word problem", "kind": "Video", "description": "Sal explains how to find the value of a rectangular prism fish tank that fractional side lengths.", "slug": "marbles-in-tank-volume"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volume/solid-geometry-volume/", "id": "ZqzAOZ9pP9Q", "title": "Find the volume of a triangular prism and cube", "kind": "Video", "description": "In this tutorial we'll practice finding solid geometry volume. Keep paper and pencil nearby in case you want to remember the formulas.", "slug": "solid-geometry-volume"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volume/volume-word-problems-with-fractions/", "id": "volume-word-problems-with-fractions", "title": "Volume word problems with fractions and decimals", "description": "Practice solving volume word problems involving objects like fish tanks, truck beds, and refrigerators.", "slug": "volume-word-problems-with-fractions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's see how to find the volumes of cylinders, spheres and other three dimensional shapes.\n\nCommon Core Standard: 8.G.C.9", "node_slug": "basic-geo-volume", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volume", "extended_slug": "math/basic-geo/basic-geo-volume-surface-area/basic-geo-volume", "kind": "Topic", "slug": "basic-geo-volume"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-surface-area/", "id": "basic-geo-surface-area", "hide": false, "title": "Surface area", "child_data": [{"kind": "Video", "id": "x6e267a36"}, {"kind": "Exercise", "id": "xe57344e5"}, {"kind": "Video", "id": "xbb4d5fe8"}, {"kind": "Exercise", "id": "x888ea118"}, {"kind": "Exercise", "id": "xa493d7fe"}], "children": [{"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-surface-area/nets-of-polyhedra/", "id": "ZACf9EecFrY", "title": "Nets of polyhedra", "kind": "Video", "description": "Admittedly, \"nets of polyhedra\" sounds like the title of a bad sci-fi movie about man-eating, muti-headed fish. But in reality, nets of polyhedra are just 2D objects that wrap around 3D objects, like wrapping paper around presents.", "slug": "nets-of-polyhedra"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-surface-area/nets-of-3d-figures/", "id": "nets-of-3d-figures", "title": "Nets of 3D figures", "description": "Practice matching 2D nets to the 3D shapes the fold up into.", "slug": "nets-of-3d-figures", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-surface-area/surface-area-from-net/", "id": "m1ZTnl4CNQg", "title": "Finding surface area: nets of polyhedra", "kind": "Video", "description": "Sal solves a problem about whether or not a certain net could be folded up into a certain rectangular prism.", "slug": "surface-area-from-net"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-surface-area/surface-area/", "id": "surface-area", "title": "Surface area using nets", "description": "Practice using the net of a 3D figure to find surface area.", "slug": "surface-area", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-surface-area/surface-areas/", "id": "surface-areas", "title": "Surface area", "description": "Practice finding the surface area of 3D objects.", "slug": "surface-areas", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's explore the volume and surface area of 3D shapes.\n\nCommon Core Standards: 6.G.A.2, 6.G.A.4", "node_slug": "basic-geo-surface-area", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-volume-surface-area/basic-geo-surface-area", "extended_slug": "math/basic-geo/basic-geo-volume-surface-area/basic-geo-surface-area", "kind": "Topic", "slug": "basic-geo-surface-area"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volumes/", "id": "basic-geo-volumes", "hide": false, "title": "Volume of cones, cylinders, and spheres", "child_data": [{"kind": "Video", "id": "60129395"}, {"kind": "Video", "id": "x8cc61186"}, {"kind": "Video", "id": "372432663"}, {"kind": "Exercise", "id": "x0a326293"}], "children": [{"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volumes/cylinder-volume-and-surface-area/", "id": "gL3HxBQyeg0", "title": "Cylinder volume and surface area", "kind": "Video", "description": "Finding the volume and surface area of a cylinder", "slug": "cylinder-volume-and-surface-area"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volumes/volume-cone-example/", "id": "hC6zx9WAiC4", "title": "Volume of a cone", "kind": "Video", "slug": "volume-cone-example"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volumes/volume-of-a-sphere/", "id": "IelS2vg7JO8", "title": "Volume of a sphere", "kind": "Video", "description": "Volume of a Sphere", "slug": "volume-of-a-sphere"}, {"path": "khan/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volumes/volume-word-problems-with-cones-cylinders-and-spheres/", "id": "volume-word-problems-with-cones--cylinders--and-spheres", "title": "Volume word problems with cones, cylinders, and spheres", "slug": "volume-word-problems-with-cones-cylinders-and-spheres", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "basic-geo-volumes", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-volume-surface-area/basic-geo-volumes", "extended_slug": "math/basic-geo/basic-geo-volume-surface-area/basic-geo-volumes", "kind": "Topic", "slug": "basic-geo-volumes"}], "in_knowledge_map": false, "description": "Volume and surface area help us measure the size of 3D objects. We\u2019ll start with the volume and surface area of rectangular prisms. From there, we\u2019ll tackle trickier objects, such as cones and spheres.", "node_slug": "basic-geo-volume-surface-area", "render_type": "Topic", "topic_page_url": "/math/basic-geo/basic-geo-volume-surface-area", "extended_slug": "math/basic-geo/basic-geo-volume-surface-area", "kind": "Topic", "slug": "basic-geo-volume-surface-area"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-pythagorean-topic/", "id": "basic-geo-pythagorean-topic", "hide": false, "title": "The Pythagorean theorem", "child_data": [{"kind": "Topic", "id": "x7b063a3c"}, {"kind": "Topic", "id": "x81573029"}, {"kind": "Topic", "id": "x085dec35"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/", "id": "basic-geo-pythagorean-theorem", "hide": false, "title": "The Pythagorean theorem", "child_data": [{"kind": "Video", "id": "23754"}, {"kind": "Video", "id": "2600799"}, {"kind": "Video", "id": "26902"}, {"kind": "Video", "id": "26903"}, {"kind": "Video", "id": "26766"}, {"kind": "Exercise", "id": "3032"}, {"kind": "Exercise", "id": "x24844d0b"}, {"kind": "Video", "id": "23756"}, {"kind": "Exercise", "id": "4514693"}, {"kind": "Video", "id": "x19541b96"}], "children": [{"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/pythagorean-theorem/", "id": "AEIzy1kNRqo", "title": "Pythagorean theorem", "kind": "Video", "description": "Pythagorean Theorem", "slug": "pythagorean-theorem"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/the-pythagorean-theorem/", "id": "AA6RfgP-AHU", "title": "The Pythagorean theorem intro", "kind": "Video", "description": "Introduction to the Pythagorean Theorem", "slug": "the-pythagorean-theorem"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/pythagorean-theorem-1/", "id": "JVrkLIcA2qw", "title": "Pythagorean theorem 1", "kind": "Video", "description": "Pythagorean Theorem 1", "slug": "pythagorean-theorem-1"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/pythagorean-theorem-2/", "id": "O64YFlX1_aI", "title": "Pythagorean theorem 2", "kind": "Video", "description": "Pythagorean Theorem 2", "slug": "pythagorean-theorem-2"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/pythagorean-theorem-3/", "id": "T0IOrRETWhI", "title": "Pythagorean theorem 3", "kind": "Video", "description": "Pythagorean Theorem 3", "slug": "pythagorean-theorem-3"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/pythagorean_theorem_1/", "id": "pythagorean_theorem_1", "title": "Pythagorean theorem", "description": "Find the leg or hypotenuse of a right triangle using the Pythagorean theorem.", "slug": "pythagorean_theorem_1", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/pythagorean-theorem-word-problems/", "id": "pythagorean-theorem-word-problems", "title": "Pythagorean theorem word problems", "slug": "pythagorean-theorem-word-problems", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/distance-formula/", "id": "nyZuite17Pc", "title": "Distance formula", "kind": "Video", "description": "How to find the distance between lines using the Pythagorean Formula", "slug": "distance-formula"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/distance_formula/", "id": "distance_formula", "title": "Distance formula", "description": "Use the Pythagorean theorem to find the distance between two points on the coordinate plane.", "slug": "distance_formula", "kind": "Exercise"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem/soccer-thiago/", "id": "XtJwkIacpi8", "title": "Thiago asks: How much time does a goalkeeper have to react to a penalty kick?", "kind": "Video", "slug": "soccer-thiago"}], "in_knowledge_map": false, "description": "Named after the Greek philosopher who lived nearly 2600 years ago, the Pythagorean theorem is as good as math theorems get (Pythagoras also started a religious movement). It's simple. It's beautiful. It's powerful.\n\nCommon Core Standards: 8.G.B.7, 8.G.B.8", "node_slug": "basic-geo-pythagorean-theorem", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem", "extended_slug": "math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-theorem", "kind": "Topic", "slug": "basic-geo-pythagorean-theorem"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-special-right-triangle/", "id": "basic-geo-special-right-triangle", "hide": false, "title": "Special right triangles", "child_data": [{"kind": "Video", "id": "292160871"}, {"kind": "Video", "id": "292160870"}, {"kind": "Video", "id": "294677485"}, {"kind": "Exercise", "id": "3034"}], "children": [{"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-special-right-triangle/30-60-90-triangle-side-ratios-proof/", "id": "SFL4stapeUs", "title": "30-60-90 triangle side ratios proof", "kind": "Video", "description": "Proving the ratios between the sides of a 30-60-90 triangle", "slug": "30-60-90-triangle-side-ratios-proof"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-special-right-triangle/45-45-90-triangle-side-ratios/", "id": "McINBOFCGH8", "title": "45-45-90 triangle side ratios", "kind": "Video", "description": "Showing the ratios of the sides of a 45-45-90 triangle are 1:1:sqrt(2)", "slug": "45-45-90-triangle-side-ratios"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-special-right-triangle/30-60-90-triangle-example-problem/", "id": "dgHksfBFbjk", "title": "30-60-90 triangle example problem", "kind": "Video", "description": "Using what we know about 30-60-90 triangles to solve what at first seems to be a challenging problem", "slug": "30-60-90-triangle-example-problem"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-special-right-triangle/pythagorean_theorem_2/", "id": "pythagorean_theorem_2", "title": "Special right triangles", "slug": "pythagorean_theorem_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We hate to pick favorites, but there really are certain right triangles that are more special than others. In this tutorial, we pick them out, show why they're special, and prove it! These include 30-60-90 and 45-45-90 triangles (the numbers refer to the measure of the angles in the triangle).", "node_slug": "basic-geo-special-right-triangle", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-special-right-triangle", "extended_slug": "math/basic-geo/basic-geo-pythagorean-topic/basic-geo-special-right-triangle", "kind": "Topic", "slug": "basic-geo-special-right-triangle"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-proofs/", "id": "basic-geo-pythagorean-proofs", "hide": false, "title": "Pythagorean theorem proofs", "child_data": [{"kind": "Video", "id": "1199652424"}, {"kind": "Video", "id": "1199369003"}, {"kind": "Video", "id": "290279020"}, {"kind": "Video", "id": "1199568849"}, {"kind": "Exercise", "id": "xc871e072"}], "children": [{"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-proofs/garfield-s-proof-of-the-pythagorean-theorem/", "id": "EINpkcphsPQ", "title": "Garfield's proof of the Pythagorean theorem", "kind": "Video", "description": "James Garfield's proof of the Pythagorean Theorem.", "slug": "garfield-s-proof-of-the-pythagorean-theorem"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-proofs/bhaskara-s-proof-of-pythagorean-theorem-avi/", "id": "1ul8g55dYA4", "title": "Bhaskara's proof of the Pythagorean theorem", "kind": "Video", "description": "An elegant visual proof of the Pythagorean Theorem developed by the 12th century Indian mathematician Bhaskara.", "slug": "bhaskara-s-proof-of-pythagorean-theorem-avi"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-proofs/pythagorean-theorem-proof-using-similarity/", "id": "LrS5_l-gk94", "title": "Pythagorean theorem proof using similarity", "kind": "Video", "description": "Proof of the Pythagorean Theorem using similarity", "slug": "pythagorean-theorem-proof-using-similarity"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-proofs/another-pythagorean-theorem-proof/", "id": "rcBaqkGp7CA", "title": "Another Pythagorean theorem proof", "kind": "Video", "description": "Visually proving the Pythagorean Theorem", "slug": "another-pythagorean-theorem-proof"}, {"path": "khan/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-proofs/pythagorean-theorem-proofs/", "id": "pythagorean-theorem-proofs", "title": "Pythagorean Theorem proofs", "description": "Explain a proof of the Pythagorean Theorem and its converse.", "slug": "pythagorean-theorem-proofs", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The Pythagorean theorem is one of the most famous ideas in all of mathematics. This tutorial proves it. Then proves it again... and again... and again. More than just satisfying any skepticism of whether the Pythagorean theorem is really true (only one proof would be sufficient for that), it will hopefully open your mind to new and beautiful ways to prove something very powerful.\n\nCommon Core Standard: 8.G.B.6", "node_slug": "basic-geo-pythagorean-proofs", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-proofs", "extended_slug": "math/basic-geo/basic-geo-pythagorean-topic/basic-geo-pythagorean-proofs", "kind": "Topic", "slug": "basic-geo-pythagorean-proofs"}], "in_knowledge_map": false, "description": "The Pythagorean theorem describes a special relationship between the sides of a right triangle. Even the ancients knew of this relationship. In this topic, we\u2019ll figure out how to use the Pythagorean theorem and prove why it works.", "node_slug": "basic-geo-pythagorean-topic", "render_type": "Topic", "topic_page_url": "/math/basic-geo/basic-geo-pythagorean-topic", "extended_slug": "math/basic-geo/basic-geo-pythagorean-topic", "kind": "Topic", "slug": "basic-geo-pythagorean-topic"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/basic-geo/transformations-congruence-similarity-geo/", "id": "transformations-congruence-similarity-geo", "hide": false, "title": "Transformations, congruence, and similarity", "child_data": [{"kind": "Topic", "id": "xf4924050"}, {"kind": "Topic", "id": "x39e6b5e9"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/", "id": "transformations-basics", "hide": false, "title": "Transformations", "child_data": [{"kind": "Video", "id": "x0bee44bd"}, {"kind": "Video", "id": "xdc65b657"}, {"kind": "Exercise", "id": "x73c74d82"}, {"kind": "Video", "id": "xd50b8c60"}, {"kind": "Video", "id": "xd12e1d3c"}, {"kind": "Video", "id": "x68aec32a"}, {"kind": "Exercise", "id": "xc4fb61cc"}, {"kind": "Video", "id": "x0482ccff"}, {"kind": "Video", "id": "x0ed71769"}, {"kind": "Exercise", "id": "xbdeb6941"}], "children": [{"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/translations-of-polygons/", "id": "u9B-dV6r6rU", "title": "Translations of polygons", "kind": "Video", "slug": "translations-of-polygons"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/determining-a-translation-for-a-shape/", "id": "ZhROXmbUVKE", "title": "Determining a translation for a shape", "kind": "Video", "slug": "determining-a-translation-for-a-shape"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/performing-translations-on-the-coordinate-plane/", "id": "performing-translations-on-the-coordinate-plane", "title": "Perform translations", "description": "Use the interactive transformation tool to perform translations.", "slug": "performing-translations-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/rotation-of-polygons-example/", "id": "Hur3v1hrX3U", "title": "Rotation of polygons example", "kind": "Video", "slug": "rotation-of-polygons-example"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/performing-a-rotation-to-match-figures/", "id": "QWX39H9kKvE", "title": "Performing a rotation to match figures", "kind": "Video", "slug": "performing-a-rotation-to-match-figures"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/rotating-segment-about-orgin-example/", "id": "sQfsql8BPy0", "title": "Rotating segment about origin example", "kind": "Video", "slug": "rotating-segment-about-orgin-example"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/performing-rotations-on-the-coordinate-plane/", "id": "performing-rotations-on-the-coordinate-plane", "title": "Perform rotations", "description": "Use the interactive transformation tool to perform rotations.", "slug": "performing-rotations-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/reflection-and-mapping-points-example/", "id": "Y70TTv5ZLkk", "title": "Reflection and mapping points example", "kind": "Video", "slug": "reflection-and-mapping-points-example"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/reflecting-line-across-another-line-example/", "id": "0VARkb_n-Bs", "title": "Reflecting line across another line example", "kind": "Video", "slug": "reflecting-line-across-another-line-example"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics/performing-reflections-on-the-coordinate-plane/", "id": "performing-reflections-on-the-coordinate-plane", "title": "Perform reflections", "description": "Use the interactive transformation tool to perform reflections.", "slug": "performing-reflections-on-the-coordinate-plane", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "transformations-basics", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/transformations-congruence-similarity-geo/transformations-basics", "extended_slug": "math/basic-geo/transformations-congruence-similarity-geo/transformations-basics", "kind": "Topic", "slug": "transformations-basics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity/", "id": "basic-geo-congruence-similarity", "hide": false, "title": "Congruence and similarity", "child_data": [{"kind": "Video", "id": "xdfa0c35c"}, {"kind": "Video", "id": "x5172fee3"}, {"kind": "Exercise", "id": "x70bbe456"}, {"kind": "Video", "id": "x86399361"}, {"kind": "Video", "id": "x1eac271a"}, {"kind": "Video", "id": "xfc5aad45"}, {"kind": "Exercise", "id": "xd977e63d"}], "children": [{"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity/testing-congruence-by-transformations-example/", "id": "Tn9U8hLu9aI", "title": "How to determine that two figures are congruent (example)", "kind": "Video", "description": "Sal shows that a given pair of pentagons are congruent by mapping one onto the other using rigid transformations.", "slug": "testing-congruence-by-transformations-example"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity/another-congruence-by-transformation-example/", "id": "EDlZAyhWxhk", "title": "How to determine that two figures are not congruent (example)", "kind": "Video", "description": "Sal shows that a given pair of pentagons are not congruent by showing it's not possible to map one onto the other using rigid transformations.", "slug": "another-congruence-by-transformation-example"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity/exploring-rigid-transformations-and-congruence/", "id": "exploring-rigid-transformations-and-congruence", "title": "Determine whether two figures are congruent", "description": "Given a pair of figures in the coordinate plane, try to map one onto the other and determine whether they are congruent.", "slug": "exploring-rigid-transformations-and-congruence", "kind": "Exercise"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity/scaling-down-a-triangle-by-half/", "id": "qlWZJ21O63s", "title": "How to draw the image of a shrinking dilation about the origin (example)", "kind": "Video", "description": "Sal is given a triangle on the coordinate plane and he draws the image of the triangle under a dilation with scale factor 1/2 about the origin.", "slug": "scaling-down-a-triangle-by-half"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity/comparing-side-lengths-after-dilation/", "id": "2yjSAarzWF8", "title": "Comparing side lengths after dilation", "kind": "Video", "slug": "comparing-side-lengths-after-dilation"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity/testing-similarity-through-transformations/", "id": "6p1lweGactg", "title": "Testing similarity through transformations", "kind": "Video", "slug": "testing-similarity-through-transformations"}, {"path": "khan/math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity/exploring-angle-preserving-transformations-and-similarity/", "id": "exploring-angle-preserving-transformations-and-similarity", "title": "Exploring angle-preserving transformations and similarity", "slug": "exploring-angle-preserving-transformations-and-similarity", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "basic-geo-congruence-similarity", "render_type": "Tutorial", "topic_page_url": "/math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity", "extended_slug": "math/basic-geo/transformations-congruence-similarity-geo/basic-geo-congruence-similarity", "kind": "Topic", "slug": "basic-geo-congruence-similarity"}], "in_knowledge_map": false, "description": "Learn about geometric transformations and how they're used to understand the meaning of \"similar\" and \"congruent\".", "node_slug": "transformations-congruence-similarity-geo", "render_type": "Topic", "topic_page_url": "/math/basic-geo/transformations-congruence-similarity-geo", "extended_slug": "math/basic-geo/transformations-congruence-similarity-geo", "kind": "Topic", "slug": "transformations-congruence-similarity-geo"}], "in_knowledge_map": false, "description": "Get up to speed on the core foundations of geometry.", "node_slug": "basic-geo", "render_type": "Subject", "topic_page_url": "/math/basic-geo", "extended_slug": "math/basic-geo", "kind": "Topic", "slug": "basic-geo"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/", "id": "geometry", "hide": false, "title": "Geometry", "child_data": [{"kind": "Topic", "id": "x4a5fa9b1"}, {"kind": "Topic", "id": "x6ddff038"}, {"kind": "Topic", "id": "x7ca5999e"}, {"kind": "Topic", "id": "xc6b8f425"}, {"kind": "Topic", "id": "xc8e66653"}, {"kind": "Topic", "id": "x7f4d2dc1"}, {"kind": "Topic", "id": "x3941da99"}, {"kind": "Topic", "id": "x2b399649"}, {"kind": "Topic", "id": "x9dc39988"}, {"kind": "Topic", "id": "x733a047e"}, {"kind": "Topic", "id": "xaf60b762"}, {"kind": "Topic", "id": "x2b70434f"}, {"kind": "Topic", "id": "x82bf49e8"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/intro_euclid/", "id": "intro_euclid", "hide": false, "title": "Introduction to Euclidean geometry", "child_data": [{"kind": "Video", "id": "611293511"}, {"kind": "Video", "id": "611259516"}, {"kind": "Video", "id": "211177355"}, {"kind": "Exercise", "id": "205328272"}, {"kind": "Video", "id": "xfcdfb0ea"}, {"kind": "Exercise", "id": "x56a1eef4"}, {"kind": "Video", "id": "x9922e4bf"}, {"kind": "Exercise", "id": "729626121"}, {"kind": "Video", "id": "xf56c1db9"}, {"kind": "Exercise", "id": "x67b34a89"}, {"kind": "Video", "id": "261106564"}, {"kind": "Video", "id": "294676192"}, {"kind": "Separator", "id": "_separator"}, {"kind": "Video", "id": "372432665"}], "children": [{"path": "khan/math/geometry/intro_euclid/euclid-as-the-father-of-geometry/", "id": "WqzK3UAXaHs", "title": "Euclid as the father of geometry", "kind": "Video", "description": "We don't normally delve too far into history when talking about math, but sometimes it's important to have perspective about how some of our math concepts came about and how influential they have become.", "slug": "euclid-as-the-father-of-geometry"}, {"path": "khan/math/geometry/intro_euclid/language-and-notation-of-basic-geometry/", "id": "il0EJrY64qE", "title": "Basic geometry: language and labels", "kind": "Video", "description": "Before learning any new concept (mathematical or otherwise), it's important we learn and use a common language and label concepts consistently.", "slug": "language-and-notation-of-basic-geometry"}, {"path": "khan/math/geometry/intro_euclid/lines-line-segments-and-rays/", "id": "JcqCf762y9w", "title": "Intro to lines, line segments, and rays", "kind": "Video", "description": "Let's get familiar with the difference between lines, line segments, and rays. Hint: a ray is somewhere between a line and a line segment!", "slug": "lines-line-segments-and-rays"}, {"path": "khan/math/geometry/intro_euclid/recognizing_rays_lines_and_line_segments/", "id": "recognizing_rays_lines_and_line_segments", "title": "Recognizing rays, lines, and line segments", "description": "Identify rays, lines, and line segments in geometric figures.", "slug": "recognizing_rays_lines_and_line_segments", "kind": "Exercise"}, {"path": "khan/math/geometry/intro_euclid/drawing-lines-exercise-example/", "id": "DkZnevdbf0A", "title": "Drawing line segments example", "kind": "Video", "description": "Let's put our new knowledge of line segments to use in this example problem. We'll help you!", "slug": "drawing-lines-exercise-example"}, {"path": "khan/math/geometry/intro_euclid/drawing-lines/", "id": "drawing-lines", "title": "Drawing rays, lines, and line segments", "description": "Draw rays, lines, and line segments with given points. \u00a0Create parallel and perpendicular lines.", "slug": "drawing-lines", "kind": "Exercise"}, {"path": "khan/math/geometry/intro_euclid/specifying-planes-in-three-dimensions/", "id": "J2Qz-7ZWDAE", "title": "Specifying planes in three dimensions", "kind": "Video", "slug": "specifying-planes-in-three-dimensions"}, {"path": "khan/math/geometry/intro_euclid/points_lines_and_planes/", "id": "points_lines_and_planes", "title": "Points, lines, and planes", "slug": "points_lines_and_planes", "kind": "Exercise"}, {"path": "khan/math/geometry/intro_euclid/geometric-precision-practice/", "id": "iDQ1foxYf0o", "title": "Geometric precision practice", "kind": "Video", "slug": "geometric-precision-practice"}, {"path": "khan/math/geometry/intro_euclid/geometric-definitions/", "id": "geometric-definitions", "title": "Geometric definitions", "slug": "geometric-definitions", "kind": "Exercise"}, {"path": "khan/math/geometry/intro_euclid/language-and-notation-of-the-circle/", "id": "U2W7HPyC0cM", "title": "Language and notation of the circle", "kind": "Video", "description": "Formal definition of a circle. Tangent and secant lines. Diameters and radii. major and minor arcs", "slug": "language-and-notation-of-the-circle"}, {"path": "khan/math/geometry/intro_euclid/the-golden-ratio/", "id": "5zosU6XTgSY", "title": "The golden ratio", "kind": "Video", "description": "An introduction to one of the most amazing ideas/numbers in mathematics", "slug": "the-golden-ratio"}, {"path": "khan/math/geometry/intro_euclid/identifying-rays/", "id": "w9jEq6dmqPg", "title": "Identifying rays", "kind": "Video", "description": "Identifying Rays", "slug": "identifying-rays"}], "in_knowledge_map": false, "description": "Roughly 2400 years ago, Euclid of Alexandria wrote Elements which served as the world's geometry textbook until recently. Studied by Abraham Lincoln in order to sharpen his mind and truly appreciate mathematical deduction, it is still the basis of what we consider a first year course in geometry.\n\nThis tutorial gives a bit of this background and then lays the conceptual foundation of points, lines, circles and planes that we will use as we journey through the world of Euclid.", "node_slug": "intro_euclid", "render_type": "Tutorial", "topic_page_url": "/math/geometry/intro_euclid", "extended_slug": "math/geometry/intro_euclid", "kind": "Topic", "slug": "intro_euclid"}, {"icon_src": "/images/power-mode/badges/parallel-and-perpendicular-lines-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/parallel-and-perpendicular-lines/", "id": "parallel-and-perpendicular-lines", "hide": false, "title": "Angles and intersecting lines", "child_data": [{"kind": "Topic", "id": "x17d76a28"}, {"kind": "Topic", "id": "xb200efa8"}, {"kind": "Topic", "id": "x29d7a8b6"}, {"kind": "Topic", "id": "x641cfe7f"}, {"kind": "Topic", "id": "xc8806320"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/", "id": "Angle_basics", "hide": false, "title": "Angle basics and measurement", "child_data": [{"kind": "Video", "id": "263439065"}, {"kind": "Video", "id": "263439060"}, {"kind": "Video", "id": "263439062"}, {"kind": "Video", "id": "211177356"}, {"kind": "Exercise", "id": "196064396"}, {"kind": "Video", "id": "60129393"}, {"kind": "Exercise", "id": "47757395"}, {"kind": "Video", "id": "x40ad80ea"}, {"kind": "Video", "id": "x15cb233f"}], "children": [{"path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/angle-basics/", "id": "H-de6Tkxej8", "title": "Angle basics", "kind": "Video", "description": "The naming of an angle is related to the line segments that create it. We'll also learn about the angle's vertex. Come on. Let's do this.", "slug": "angle-basics"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/measuring-angles-in-degrees/", "id": "92aLiyeQj0w", "title": "Measuring angles in degrees", "kind": "Video", "description": "Let's come up with an exact way to measure an angle using a protractor. We'll also learn about acute angles. Not to be confused with augly angles :)", "slug": "measuring-angles-in-degrees"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/using-a-protractor/", "id": "dw41PMWek6U", "title": "Measuring angles using a protractor", "kind": "Video", "description": "Let's use our virtual protractor to measure some angles together, shall we?", "slug": "using-a-protractor"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/measuring-angles/", "id": "wJ37GJyViU8", "title": "More angle measurements using a protractor", "kind": "Video", "description": "We're practicing measuring angles using the virtual protractor. Do this a few times with us and you'll use a real protractor like a pro!", "slug": "measuring-angles"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/measuring_angles/", "id": "measuring_angles", "title": "Measuring angles", "description": "Measure angles using a protractor.", "slug": "measuring_angles", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/acute-right-and-obtuse-angles/", "id": "ALhv3Rlydig", "title": "Acute right and obtuse angles", "kind": "Video", "description": "We briefly discussed the types of angles in the last tutorial but we'll delve a little deeper into acute, obtuse, and right angles here.", "slug": "acute-right-and-obtuse-angles"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/angle_types/", "id": "angle_types", "title": "Angle types", "description": "Determine if an angle is acute, right, or obtuse. \u00a0A protractor is provided.", "slug": "angle_types", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/vertical-adjacent-and-linearly-paired-angles/", "id": "vAlazPPFlyY", "title": "Vertical, adjacent and linearly paired angles", "kind": "Video", "slug": "vertical-adjacent-and-linearly-paired-angles"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/angle_basics/angle-measurement-and-circle-arcs/", "id": "D-EIh7NJvtQ", "title": "Angle measurement and circle arcs", "kind": "Video", "description": "Did you know that the measurement of an angle is realted to the arc of a circle? Yes, indeed! Watch.", "slug": "angle-measurement-and-circle-arcs"}], "in_knowledge_map": false, "description": "This tutorial will define what an angle is and help us think about how to measure them. If you're new to angles, this is a great place to start.", "node_slug": "Angle_basics", "render_type": "Tutorial", "topic_page_url": "/math/geometry/parallel-and-perpendicular-lines/Angle_basics", "extended_slug": "math/geometry/parallel-and-perpendicular-lines/Angle_basics", "kind": "Topic", "slug": "angle_basics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/", "id": "ang_intro", "hide": false, "title": "Angles between intersecting and parallel lines", "child_data": [{"kind": "Video", "id": "263439063"}, {"kind": "Exercise", "id": "265340597"}, {"kind": "Video", "id": "x67c17e9a"}, {"kind": "Exercise", "id": "415276545"}, {"kind": "Video", "id": "263439066"}, {"kind": "Video", "id": "263439061"}, {"kind": "Video", "id": "372432667"}, {"kind": "Video", "id": "xc5b28d56"}, {"kind": "Exercise", "id": "844384906"}, {"kind": "Exercise", "id": "272338869"}, {"kind": "Video", "id": "xa92ee636"}, {"kind": "Exercise", "id": "413665443"}, {"kind": "Video", "id": "24456"}, {"kind": "Video", "id": "x07781167"}, {"kind": "Video", "id": "xab39abd2"}, {"kind": "Exercise", "id": "xcdf4fe8a"}], "children": [{"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/angles-at-the-intersection-of-two-lines/", "id": "_7aUxFzTG5w", "title": "Introduction to vertical angles", "kind": "Video", "description": "By using our knowledge of supplementary, adjacent, and vertical angles, we can solve problems involving the intersection of two lines. Including this one!", "slug": "angles-at-the-intersection-of-two-lines"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/vertical_angles/", "id": "vertical_angles", "title": "Vertical angles", "slug": "vertical_angles", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/using-algebra-to-find-the-measures-of-vertical-angles/", "id": "2CZrkdtgeNU", "title": "Find measure of vertical angles", "kind": "Video", "description": "Now that we've learned about complementary and supplementary angles, let's use algebra to find the measure of vertical angles, or angles opposite each other when two lines cross.", "slug": "using-algebra-to-find-the-measures-of-vertical-angles"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/vertical_angles_2/", "id": "vertical_angles_2", "title": "Equation practice with vertical angles", "slug": "vertical_angles_2", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/proof-vertical-angles-are-equal/", "id": "wRBMmiNHQaE", "title": "Proof: Vertical angles are equal", "kind": "Video", "description": "Proving that vertical angles are equal", "slug": "proof-vertical-angles-are-equal"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/angles-formed-by-parallel-lines-and-transversals/", "id": "H-E5rlpCVu4", "title": "Angles formed by parallel lines and transversals", "kind": "Video", "description": "Parallel lines, transversal lines, corresponding angles", "slug": "angles-formed-by-parallel-lines-and-transversals"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/identifying-parallel-and-perpendicular-lines/", "id": "aq_XL6FrmGs", "title": "Identifying parallel and perpendicular lines", "kind": "Video", "description": "Let's now apply what we learned and do an exercise together in which we identify parallel and perpendicular lines.This is great practice.", "slug": "identifying-parallel-and-perpendicular-lines"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/figuring-out-angles-between-transversal-and-parallel-lines/", "id": "2WjGD3LZEWo", "title": "Figuring out angles between transversal and parallel lines", "kind": "Video", "slug": "figuring-out-angles-between-transversal-and-parallel-lines"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/congruent_angles/", "id": "congruent_angles", "title": "Congruent angles", "description": "Determine which angles must be congruent when parallel lines are crossed by a transversal.", "slug": "congruent_angles", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/parallel_lines_1/", "id": "parallel_lines_1", "title": "Parallel lines 1", "slug": "parallel_lines_1", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/using-algebra-to-find-measures-of-angles-formed-from-transversal/", "id": "Ld7Vxb5XV6A", "title": "Using algebra to find measures of angles formed from transversal", "kind": "Video", "slug": "using-algebra-to-find-measures-of-angles-formed-from-transversal"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/parallel_lines_2/", "id": "parallel_lines_2", "title": "Equation practice with congruent angles", "slug": "parallel_lines_2", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/ca-geometry-deducing-angle-measures/", "id": "_HJljJuVHLw", "title": "CA Geometry: Deducing angle measures", "kind": "Video", "description": "46-50, deducing the measure of angles", "slug": "ca-geometry-deducing-angle-measures"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/showing-angles-have-same-measure/", "id": "2SOK_IrpHeQ", "title": "Showing angles have same measure", "kind": "Video", "slug": "showing-angles-have-same-measure"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/line-and-angle-proofs-exercise/", "id": "uYXhga17q1g", "title": "Line and angle proofs exercise", "kind": "Video", "slug": "line-and-angle-proofs-exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/ang_intro/line-and-angle-proofs/", "id": "line-and-angle-proofs", "title": "Line and angle proofs", "description": "Explore different ways of proving some theorems about lines and angles. Some transformations are used.", "slug": "line-and-angle-proofs", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Welcome. I'd like to introduce you to Mr. Angle. Nice to meet you. So nice to meet you. \n\nThis tutorial introduces us to angles. It includes how we measure them, how angles relate to each other and properties of angles created from various types of intersecting lines. Mr. Angle is actually far more fun than you might initially presume him to be.", "node_slug": "ang_intro", "render_type": "Tutorial", "topic_page_url": "/math/geometry/parallel-and-perpendicular-lines/ang_intro", "extended_slug": "math/geometry/parallel-and-perpendicular-lines/ang_intro", "kind": "Topic", "slug": "ang_intro"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/", "id": "triang_prop_tut", "hide": false, "title": "Angles with triangles and polygons", "child_data": [{"kind": "Video", "id": "265540637"}, {"kind": "Video", "id": "265540642"}, {"kind": "Video", "id": "265540638"}, {"kind": "Video", "id": "265540640"}, {"kind": "Video", "id": "265540635"}, {"kind": "Video", "id": "265540641"}, {"kind": "Video", "id": "265540639"}, {"kind": "Exercise", "id": "2023"}, {"kind": "Exercise", "id": "2024"}, {"kind": "Video", "id": "287107579"}, {"kind": "Exercise", "id": "324859999"}, {"kind": "Video", "id": "272207189"}], "children": [{"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/proof-sum-of-measures-of-angles-in-a-triangle-are-180/", "id": "6s1CI3uuhko", "title": "Proof: Measures of interior angles of a triangle sum to 180\u00b0", "kind": "Video", "description": "Sal gives a formal proof that the\u00a0measures of interior angles of a triangle sum to 180\u00b0.", "slug": "proof-sum-of-measures-of-angles-in-a-triangle-are-180"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/triangle-angle-example-1/", "id": "hmj3_zbz2eg", "title": "Triangle angle example 1", "kind": "Video", "description": "Figuring out angles in a triangle. A little about exterior angles being the sum of the remote interior angles", "slug": "triangle-angle-example-1"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/triangle-angle-example-2/", "id": "eTwnt4G5xE4", "title": "Triangle angle example 2", "kind": "Video", "description": "Another example finding angles in triangles", "slug": "triangle-angle-example-2"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/triangle-angle-example-3/", "id": "iqeGTtyzQ1I", "title": "Triangle angle example 3", "kind": "Video", "description": "Multiple ways to solve for the angles of multiple triangles", "slug": "triangle-angle-example-3"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/challenging-triangle-angle-problem/", "id": "95logvV8nXY", "title": "Challenging triangle angle problem", "kind": "Video", "description": "Interesting problem finding the sums of particular exterior angles of an irregular pentagon", "slug": "challenging-triangle-angle-problem"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/proof-corresponding-angle-equivalence-implies-parallel-lines/", "id": "9_3OxtdqmqE", "title": "Proof: Corresponding angle equivalence implies parallel lines", "kind": "Video", "description": "Proof by contradiction that corresponding angle equivalence implies parallel lines", "slug": "proof-corresponding-angle-equivalence-implies-parallel-lines"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/finding-more-angles/", "id": "0gzSreH8nUI", "title": "Finding more angles", "kind": "Video", "description": "Example of angle hunting!", "slug": "finding-more-angles"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/angles_1/", "id": "angles_1", "title": "Finding angle measures 1", "slug": "angles_1", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/angles_2/", "id": "angles_2", "title": "Finding angle measures 2", "slug": "angles_2", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/sum-of-interior-angles-of-a-polygon/", "id": "qG3HnRccrQU", "title": "Sum of interior angles of a polygon", "kind": "Video", "description": "Showing a generalized way to find the sum of the interior angles of any polygon", "slug": "sum-of-interior-angles-of-a-polygon"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/angles_of_a_polygon/", "id": "angles_of_a_polygon", "title": "Angles of a polygon", "slug": "angles_of_a_polygon", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/sum-of-the-exterior-angles-of-convex-polygon/", "id": "W9B3VYdC5T8", "title": "Sum of the exterior angles of convex polygon", "kind": "Video", "description": "More elegant way to find the sum of the exterior angles of a convex polygon", "slug": "sum-of-the-exterior-angles-of-convex-polygon"}], "in_knowledge_map": false, "description": "Do the angles in a triangle always add up to the same thing? Would I ask it if they didn't? What do we know about the angles of a triangle if two of the sides are congruent (an isosceles triangle) or all three are congruent (an equilateral)? This tutorial is the place to find out.", "node_slug": "triang_prop_tut", "render_type": "Tutorial", "topic_page_url": "/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut", "extended_slug": "math/geometry/parallel-and-perpendicular-lines/triang_prop_tut", "kind": "Topic", "slug": "triang_prop_tut"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/", "id": "old_angles", "hide": false, "title": "Sal's old angle videos", "child_data": [{"kind": "Video", "id": "24939"}, {"kind": "Video", "id": "24941"}, {"kind": "Video", "id": "24943"}, {"kind": "Video", "id": "2600797"}, {"kind": "Video", "id": "2600798"}, {"kind": "Video", "id": "24947"}, {"kind": "Video", "id": "24953"}, {"kind": "Video", "id": "60129393"}], "children": [{"path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/introduction-to-angles-old/", "id": "2439OIVBgPg", "title": "Introduction to angles (old)", "kind": "Video", "description": "What an angle is. Angles in a circle. Complementary and supplementary angles.", "slug": "introduction-to-angles-old"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/angles-part-2/", "id": "zrqzG6xKa1A", "title": "Angles (part 2)", "kind": "Video", "description": "More on complementary and supplementary angles. Introduction to opposite angles.", "slug": "angles-part-2"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/angles-part-3/", "id": "NLg6hfoKKlE", "title": "Angles (part 3)", "kind": "Video", "description": "Angles formed when a transversal intersects parallel lines.", "slug": "angles-part-3"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/angles-formed-between-transversals-and-parallel-lines/", "id": "gRKZaojKeP0", "title": "Angles formed between transversals and parallel lines", "kind": "Video", "description": "Angles of parallel lines", "slug": "angles-formed-between-transversals-and-parallel-lines"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/angles-of-parallel-lines-2/", "id": "0eDwckZOffc", "title": "Angles of parallel lines 2", "kind": "Video", "description": "Angles of parallel lines examples", "slug": "angles-of-parallel-lines-2"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/the-angle-game/", "id": "kqU_ymV581c", "title": "The angle game", "kind": "Video", "description": "Using what we know to solve for angles in the Angle Game.", "slug": "the-angle-game"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/angle-game-part-2/", "id": "ko-cYG3d6ec", "title": "Angle game (part 2)", "kind": "Video", "description": "More examples of the Angle Game.", "slug": "angle-game-part-2"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/old_angles/acute-right-and-obtuse-angles/", "id": "ALhv3Rlydig", "title": "Acute right and obtuse angles", "kind": "Video", "description": "We briefly discussed the types of angles in the last tutorial but we'll delve a little deeper into acute, obtuse, and right angles here.", "slug": "acute-right-and-obtuse-angles"}], "in_knowledge_map": false, "description": "These are some of the classic, original angle video that Sal had done way back when (like 2007). Other tutorials are more polished than this one, but this one has charm. Also not bad if you're looking for more examples of angles between intersected lines, transversals and parallel lines.", "node_slug": "old_angles", "render_type": "Tutorial", "topic_page_url": "/math/geometry/parallel-and-perpendicular-lines/old_angles", "extended_slug": "math/geometry/parallel-and-perpendicular-lines/old_angles", "kind": "Topic", "slug": "old_angles"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl/", "id": "complementary-supplementary-angl", "hide": false, "title": "Complementary and supplementary angles", "child_data": [{"kind": "Video", "id": "263439064"}, {"kind": "Exercise", "id": "47799044"}, {"kind": "Video", "id": "x0fe8e133"}, {"kind": "Video", "id": "x2e4ad4ea"}, {"kind": "Exercise", "id": "729494328"}], "children": [{"path": "khan/math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl/complementary-and-supplementary-angles/", "id": "BTnAlNSgNsY", "title": "Complementary and supplementary angles", "kind": "Video", "description": "Let's add some tools to our geometry tool belt. Here's a thorough explanation of complementary and supplementary angles, as well as definitions of adjacent and straight angles.", "slug": "complementary-and-supplementary-angles"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl/complementary_and_supplementary_angles/", "id": "complementary_and_supplementary_angles", "title": "Complementary and supplementary angles", "slug": "complementary_and_supplementary_angles", "kind": "Exercise"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl/example-using-algebra-to-find-measure-of-complementary-angles/", "id": "XDOH9Ul2OOM", "title": "Find measure of complementary angles", "kind": "Video", "description": "In this example, let's put some Algebra to work to find the measure of two angles whose sum equals 90 degrees, better knows as complementary angles.", "slug": "example-using-algebra-to-find-measure-of-complementary-angles"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl/example-using-algebra-to-find-measure-of-supplementary-angles/", "id": "zNtbi4OJs9I", "title": "Find measure of supplementary angles", "kind": "Video", "description": "Watch and understand how to find the measure of two angles whose sum is 180 degrees, or supplementary angles.", "slug": "example-using-algebra-to-find-measure-of-supplementary-angles"}, {"path": "khan/math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl/angle_addition_postulate/", "id": "angle_addition_postulate", "title": "Equation practice with angle addition", "slug": "angle_addition_postulate", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial we'll look at the most famous types of angle-pairs--complementary and supplementary angles. This aren't particularly deep concepts, but you'll find they do come in handy!", "node_slug": "complementary-supplementary-angl", "render_type": "Tutorial", "topic_page_url": "/math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl", "extended_slug": "math/geometry/parallel-and-perpendicular-lines/complementary-supplementary-angl", "kind": "Topic", "slug": "complementary-supplementary-angl"}], "in_knowledge_map": true, "description": "This topic continues our journey through the world of Euclid by helping us understand angles and how they can relate to each other.", "node_slug": "parallel-and-perpendicular-lines", "render_type": "Topic", "topic_page_url": "/math/geometry/parallel-and-perpendicular-lines", "extended_slug": "math/geometry/parallel-and-perpendicular-lines", "kind": "Topic", "slug": "parallel-and-perpendicular-lines"}, {"icon_src": "/images/power-mode/badges/triangle-properties-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/triangle-properties/", "id": "triangle-properties", "hide": false, "title": "Special properties and parts of triangles", "child_data": [{"kind": "Topic", "id": "x68956a15"}, {"kind": "Topic", "id": "xbb63e4db"}, {"kind": "Topic", "id": "xcc148909"}, {"kind": "Topic", "id": "x9448352a"}, {"kind": "Topic", "id": "xa94b3511"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/triangle-properties/perpendicular_bisectors/", "id": "perpendicular_bisectors", "hide": false, "title": "Perpendicular bisectors", "child_data": [{"kind": "Video", "id": "298421783"}, {"kind": "Video", "id": "298435073"}, {"kind": "Video", "id": "309312179"}, {"kind": "Video", "id": "13179257"}, {"kind": "Video", "id": "13179269"}], "children": [{"path": "khan/math/geometry/triangle-properties/perpendicular_bisectors/circumcenter-of-a-triangle/", "id": "KXZ6w91DioU", "title": "Circumcenter of a triangle", "kind": "Video", "description": "Multiple proofs showing that a point is on a perpendicular bisector of a segment if and only if it is equidistant from the endpoints. Using this to establish the circumcenter, circumradius, and circumcircle for a triangle", "slug": "circumcenter-of-a-triangle"}, {"path": "khan/math/geometry/triangle-properties/perpendicular_bisectors/circumcenter-of-a-right-triangle/", "id": "VejCw2NlE60", "title": "Circumcenter of a right triangle", "kind": "Video", "description": "Showing that the midpoint of the hypotenuse is the circumcenter", "slug": "circumcenter-of-a-right-triangle"}, {"path": "khan/math/geometry/triangle-properties/perpendicular_bisectors/three-points-defining-a-circle/", "id": "4_xhiP6g2ow", "title": "Three points defining a circle", "kind": "Video", "description": "Three points uniquely define a circle. The center of a circle is the circumcenter of any triangle the circle is circumscribed about.", "slug": "three-points-defining-a-circle"}, {"path": "khan/math/geometry/triangle-properties/perpendicular_bisectors/area-circumradius-formula-proof/", "id": "x_aax6LSRtE", "title": "Area circumradius formula proof", "kind": "Video", "description": "Proof of the formula relating the area of a triangle to its circumradius", "slug": "area-circumradius-formula-proof"}, {"path": "khan/math/geometry/triangle-properties/perpendicular_bisectors/2003-aime-ii-problem-7/", "id": "jpKjXtywTlQ", "title": "2003 AIME II problem 7", "kind": "Video", "slug": "2003-aime-ii-problem-7"}], "in_knowledge_map": false, "description": "In this tutorial, we study lines that are perpendicular to the sides of a triangle and divide them in two (perpendicular bisectors). As we'll prove, they intersect at a unique point called the cicumcenter (which, quite amazingly, is equidistant to the vertices). We can then create a circle (circumcircle) centered at this point that goes through all the vertices. \n\nThis tutorial is the extension of the core narrative of the Geometry \"course\". After this, you might want to look at the tutorial on angle bisectors.", "node_slug": "perpendicular_bisectors", "render_type": "Tutorial", "topic_page_url": "/math/geometry/triangle-properties/perpendicular_bisectors", "extended_slug": "math/geometry/triangle-properties/perpendicular_bisectors", "kind": "Topic", "slug": "perpendicular_bisectors"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/triangle-properties/angle_bisectors/", "id": "angle_bisectors", "hide": false, "title": "Angle bisectors", "child_data": [{"kind": "Video", "id": "309312178"}, {"kind": "Video", "id": "309318058"}, {"kind": "Video", "id": "311447418"}, {"kind": "Video", "id": "309317056"}, {"kind": "Video", "id": "311469472"}, {"kind": "Exercise", "id": "251597535"}], "children": [{"path": "khan/math/geometry/triangle-properties/angle_bisectors/point-line-distance-and-angle-bisectors/", "id": "yj4oS-27Q3k", "title": "Point-line distance and angle bisectors", "kind": "Video", "description": "Thinking about the distance between a point and a line. Proof that a point on an angle bisector is equidistant to the sides of the angle and a point equidistant to the sides is on an angle bisector", "slug": "point-line-distance-and-angle-bisectors"}, {"path": "khan/math/geometry/triangle-properties/angle_bisectors/incenter-and-incircles-of-a-triangle/", "id": "21vbBiCVijE", "title": "Incenter and incircles of a triangle", "kind": "Video", "description": "Using angle bisectors to find the incenter and incircle of a triangle", "slug": "incenter-and-incircles-of-a-triangle"}, {"path": "khan/math/geometry/triangle-properties/angle_bisectors/inradius-perimeter-and-area/", "id": "5NjgcPri07E", "title": "Inradius, perimeter, and area", "kind": "Video", "description": "Showing that area is equal to inradius times semiperimeter", "slug": "inradius-perimeter-and-area"}, {"path": "khan/math/geometry/triangle-properties/angle_bisectors/angle-bisector-theorem-proof/", "id": "TpIBLnRAslI", "title": "Angle bisector theorem proof", "kind": "Video", "description": "What the angle bisector theorem is and its proof", "slug": "angle-bisector-theorem-proof"}, {"path": "khan/math/geometry/triangle-properties/angle_bisectors/angle-bisector-theorem-examples/", "id": "PlY3e_-9JUA", "title": "Angle bisector theorem examples", "kind": "Video", "description": "Using the angle bisector theorem to solve for sides of a triangle", "slug": "angle-bisector-theorem-examples"}, {"path": "khan/math/geometry/triangle-properties/angle_bisectors/angle_bisector_theorem/", "id": "angle_bisector_theorem", "title": "Angle bisector theorem", "slug": "angle_bisector_theorem", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial experiments with lines that divide the angles of a triangle in two (angle bisectors). As we'll prove, all three angle bisectors actually intersect at one point called the incenter (amazing!). We'll also prove that this incenter is equidistant from the sides of the triangle (even more amazing!). This allows us to create a circle centered at the incenter that is tangent to the sides of the triangle (not surprisingly called the \"incircle\").", "node_slug": "angle_bisectors", "render_type": "Tutorial", "topic_page_url": "/math/geometry/triangle-properties/angle_bisectors", "extended_slug": "math/geometry/triangle-properties/angle_bisectors", "kind": "Topic", "slug": "angle_bisectors"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/triangle-properties/medians_centroids/", "id": "medians_centroids", "hide": false, "title": "Medians and centroids", "child_data": [{"kind": "Video", "id": "13179266"}, {"kind": "Video", "id": "13179267"}, {"kind": "Video", "id": "311468473"}, {"kind": "Video", "id": "311469473"}, {"kind": "Video", "id": "319053662"}, {"kind": "Video", "id": "319066153"}], "children": [{"path": "khan/math/geometry/triangle-properties/medians_centroids/triangle-medians-and-centroids/", "id": "GiGLhXFBtRg", "title": "Triangle medians and centroids", "kind": "Video", "description": "Seeing that the centroid is 2/3 of the way along every median", "slug": "triangle-medians-and-centroids"}, {"path": "khan/math/geometry/triangle-properties/medians_centroids/triangle-medians-and-centroids-2d-proof/", "id": "Vc09LURoMQ8", "title": "Triangle medians and centroids (2D proof)", "kind": "Video", "description": "Showing that the centroid is 2/3 of the way along a median", "slug": "triangle-medians-and-centroids-2d-proof"}, {"path": "khan/math/geometry/triangle-properties/medians_centroids/medians-divide-into-smaller-triangles-of-equal-area/", "id": "Xt4sT0fV9Pw", "title": "Medians divide into smaller triangles of equal area", "kind": "Video", "description": "Showing that the three medians of a triangle divide it into six smaller triangles of equal area. Brief discussion of the centroid as well", "slug": "medians-divide-into-smaller-triangles-of-equal-area"}, {"path": "khan/math/geometry/triangle-properties/medians_centroids/exploring-medial-triangles/", "id": "Rsi5mzEaCPw", "title": "Exploring medial triangles", "kind": "Video", "description": "What a medial triangle is and its properties", "slug": "exploring-medial-triangles"}, {"path": "khan/math/geometry/triangle-properties/medians_centroids/proving-that-the-centroid-is-2-3rds-along-the-median/", "id": "i0VS3eEGjiQ", "title": "Proving that the centroid is 2-3rds along the median", "kind": "Video", "description": "Showing that the centroid divides each median into segments with a 2:1 ratio (or that the centroid is 2/3 along the median)", "slug": "proving-that-the-centroid-is-2-3rds-along-the-median"}, {"path": "khan/math/geometry/triangle-properties/medians_centroids/median-centroid-right-triangle-example/", "id": "k45QTFCHSVs", "title": "Median centroid right triangle example", "kind": "Video", "description": "Example involving properties of medians", "slug": "median-centroid-right-triangle-example"}], "in_knowledge_map": false, "description": "You've explored perpendicular bisectors and angle bisectors, but you're craving to study lines that intersect the vertices of a a triangle AND bisect the opposite sides. Well, you're luck because that (medians) is what we are going to study in this tutorial. We'll prove here that the medians intersect at a unique point (amazing!) called the centroid and divide the triangle into six mini triangles of equal area (even more amazing!). The centroid also always happens to divide all the medians in segments with lengths at a 1:2 ration (stupendous!).", "node_slug": "medians_centroids", "render_type": "Tutorial", "topic_page_url": "/math/geometry/triangle-properties/medians_centroids", "extended_slug": "math/geometry/triangle-properties/medians_centroids", "kind": "Topic", "slug": "medians_centroids"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/triangle-properties/altitudes/", "id": "altitudes", "hide": false, "title": "Altitudes", "child_data": [{"kind": "Video", "id": "319066154"}, {"kind": "Video", "id": "337196124"}], "children": [{"path": "khan/math/geometry/triangle-properties/altitudes/proof-triangle-altitudes-are-concurrent-orthocenter/", "id": "aGwT2-RERXY", "title": "Proof: Triangle altitudes are concurrent (orthocenter)", "kind": "Video", "description": "Showing that any triangle can be the medial triangle for some larger triangle. Using this to show that the altitudes of a triangle are concurrent (at the orthocenter).", "slug": "proof-triangle-altitudes-are-concurrent-orthocenter"}, {"path": "khan/math/geometry/triangle-properties/altitudes/common-orthocenter-and-centroid/", "id": "pDZIvyeqX1o", "title": "Common orthocenter and centroid", "kind": "Video", "description": "Showing that a triangle with the same point as the orthocenter and centroid is equilateral", "slug": "common-orthocenter-and-centroid"}], "in_knowledge_map": false, "description": "Ok. You knew triangles where cool, but you never imagined they were this cool! Well, this tutorial will take things even further. After perpendicular bisectors, angle bisector and medians, the only other thing (that I can think of) is a line that intersects a vertex and the opposite side (called an altitude). As we'll see, these are just as cool as the rest and, as you may have guessed, intersect at a unique point called the orthocenter (unbelievable!).", "node_slug": "altitudes", "render_type": "Tutorial", "topic_page_url": "/math/geometry/triangle-properties/altitudes", "extended_slug": "math/geometry/triangle-properties/altitudes", "kind": "Topic", "slug": "altitudes"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/triangle-properties/triangle_property_review/", "id": "triangle_property_review", "hide": false, "title": "Bringing it all together", "child_data": [{"kind": "Video", "id": "326408404"}, {"kind": "Video", "id": "326395669"}, {"kind": "Video", "id": "334522802"}], "children": [{"path": "khan/math/geometry/triangle-properties/triangle_property_review/review-of-triangle-properties/", "id": "KUhdMbx5ges", "title": "Review of triangle properties", "kind": "Video", "description": "Comparing perpendicular bisectors to angle bisectors to medians to altitudes", "slug": "review-of-triangle-properties"}, {"path": "khan/math/geometry/triangle-properties/triangle_property_review/euler-line/", "id": "tUqyJgmGY7k", "title": "Euler line", "kind": "Video", "description": "The magic and mystery of the Euler Line", "slug": "euler-line"}, {"path": "khan/math/geometry/triangle-properties/triangle_property_review/euler-s-line-proof/", "id": "t_EgAi574sM", "title": "Euler's line proof", "kind": "Video", "description": "Proving the somewhat mystical result that the circumcenter, centroid and orthocenter", "slug": "euler-s-line-proof"}], "in_knowledge_map": false, "description": "This tutorial brings together all of the major ideas in this topic. First, it starts off with a light-weight review of the various ideas in the topic. It then goes into a heavy-weight proof of a truly, truly, truly amazing idea. It was amazing enough that orthocenters, circumcenters, and centroids exist , but we'll see in the videos on Euler lines that they sit on the same line themselves (incenters must be feeling lonely)!!!!!!!", "node_slug": "triangle_property_review", "render_type": "Tutorial", "topic_page_url": "/math/geometry/triangle-properties/triangle_property_review", "extended_slug": "math/geometry/triangle-properties/triangle_property_review", "kind": "Topic", "slug": "triangle_property_review"}], "in_knowledge_map": true, "description": "You probably like triangles. You think they are useful. They show up a lot. What you'll see in this topic is that they are far more magical and mystical than you ever imagined!", "node_slug": "triangle-properties", "render_type": "Topic", "topic_page_url": "/math/geometry/triangle-properties", "extended_slug": "math/geometry/triangle-properties", "kind": "Topic", "slug": "triangle-properties"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/quadrilaterals-and-polygons/", "id": "quadrilaterals-and-polygons", "hide": false, "title": "Quadrilaterals", "child_data": [{"kind": "Topic", "id": "xbb01769c"}], "children": [{"icon_src": "/images/power-mode/badges/quadrilaterals-and-polygons-40x40.png", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/", "id": "quadrilaterals", "hide": false, "title": "Quadrilaterals", "child_data": [{"kind": "Video", "id": "339557900"}, {"kind": "Video", "id": "370305272"}, {"kind": "Video", "id": "x1b577232"}, {"kind": "Video", "id": "x819465b4"}, {"kind": "Exercise", "id": "251616813"}, {"kind": "Video", "id": "348974659"}, {"kind": "Video", "id": "348974660"}, {"kind": "Video", "id": "348974657"}, {"kind": "Exercise", "id": "251658143"}, {"kind": "Video", "id": "348974658"}, {"kind": "Video", "id": "351468822"}, {"kind": "Video", "id": "351468823"}, {"kind": "Video", "id": "897531450"}, {"kind": "Separator", "id": "_separator"}, {"kind": "Video", "id": "13179268"}], "children": [{"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/quadrilateral-overview/", "id": "Ka82QC4QvGA", "title": "Quadrilateral overview", "kind": "Video", "description": "\"Quad\" means \"four\" and \"lateral\" means \"line.\" A quadrilateral is literally a shape with four sides (lines) and four angles. Let's learn the difference between concave and convex quadrilaterals as well as trapezoids, parallelograms, and rhombi.", "slug": "quadrilateral-overview"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/quadrilateral-properties/", "id": "5CeBlu260Rw", "title": "Quadrilateral properties", "kind": "Video", "description": "How about this: we are given a 4-sided shape and asked to determine whether its properties qualify it to be called a quadrilateral (or category of quadrilaterals). Check it out.", "slug": "quadrilateral-properties"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/kites-as-a-mathematical-shape/", "id": "inlMrf2d-k4", "title": "Quadrilaterals: kites as a geometric shape", "kind": "Video", "description": "Is a kite a quadrilateral? Is it a rhombus? A parallelogram? Let's find out.", "slug": "kites-as-a-mathematical-shape"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/quadrilateral-types-exercise/", "id": "wPZIa3SjPF0", "title": "Quadrilaterals: find the type exercise", "kind": "Video", "description": "Take a look at the given data and determine what type of quadrilateral we have.", "slug": "quadrilateral-types-exercise"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/quadrilateral_types/", "id": "quadrilateral_types", "title": "Quadrilateral types", "description": "Identify quadrilaterals based on pictures or attributes. \u00a0Quadrilaterals included are parallelograms, rhombuses, rectangles, and squares.", "slug": "quadrilateral_types", "kind": "Exercise"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/proof-opposite-sides-of-parallelogram-congruent/", "id": "LhrGS4-Dd9I", "title": "Proof: Opposite sides of a parallelogram are congruent (and conversely)", "kind": "Video", "description": "Sal proves that a figure is a parallelogram if and only if opposite sides are congruent.", "slug": "proof-opposite-sides-of-parallelogram-congruent"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/proof-diagonals-of-a-parallelogram-bisect-each-other/", "id": "TErJ-Yr67BI", "title": "Proof: The diagonals of a parallelogram bisect each other (and conversely)", "kind": "Video", "description": "Sal proves that a quadrilateral is a parallelogram if and only if its diagonals bisect each other.", "slug": "proof-diagonals-of-a-parallelogram-bisect-each-other"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/proof-opposite-angles-of-parallelogram-congruent/", "id": "oIV1zM8qlpk", "title": "Proof: Opposite angles of parallelogram are congruent", "kind": "Video", "description": "Sal proves that opposite angles of a parallelogram are congruent.", "slug": "proof-opposite-angles-of-parallelogram-congruent"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/quadrilateral_angles/", "id": "quadrilateral_angles", "title": "Quadrilateral angles", "slug": "quadrilateral_angles", "kind": "Exercise"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/proof-rhombus-diagonals-are-perpendicular-bisectors/", "id": "GDcVdBAnBdU", "title": "Proof: Rhombus diagonals are perpendicular bisectors of each other", "kind": "Video", "description": "Sal proves that the diagonals of a rhombus are perpendicular, and that they intersect at the midpoints of both.", "slug": "proof-rhombus-diagonals-are-perpendicular-bisectors"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/proof-rhombus-area-half-product-of-diagonal-length/", "id": "3FManXv4mZM", "title": "Proof: Rhombus area is half the product of the lengths of its diagonals", "kind": "Video", "description": "Sal proves that we can find the area of a rhombus by taking half the product of the lengths of the diagonals.", "slug": "proof-rhombus-area-half-product-of-diagonal-length"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/area-of-a-parallelogram/", "id": "tFhBAeZVTMw", "title": "Area of a parallelogram", "kind": "Video", "description": "Guess what's interesting about the opposite sides of a parallelogram? That's right....they are parallel! Let's find the area--base times height", "slug": "area-of-a-parallelogram"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/whether-a-special-quadrilateral-can-exist/", "id": "6dIMIBO_2mc", "title": "Whether a special quadrilateral can exist", "kind": "Video", "description": "Proving whether a special quadrilateral can exist", "slug": "whether-a-special-quadrilateral-can-exist"}, {"path": "khan/math/geometry/quadrilaterals-and-polygons/quadrilaterals/rhombus-diagonals/", "id": "_QTFeOvPcbY", "title": "Rhombus diagonals", "kind": "Video", "description": "Proof that the diagonals of a rhombus are perpendicular bisectors of each other", "slug": "rhombus-diagonals"}], "in_knowledge_map": false, "description": "Not all things with four sides have to be squares or rectangles! We will now broaden our understanding of quadrilaterals.", "node_slug": "quadrilaterals", "render_type": "Tutorial", "topic_page_url": "/math/geometry/quadrilaterals-and-polygons/quadrilaterals", "extended_slug": "math/geometry/quadrilaterals-and-polygons/quadrilaterals", "kind": "Topic", "slug": "quadrilaterals"}], "in_knowledge_map": false, "description": "", "node_slug": "quadrilaterals-and-polygons", "render_type": "Topic", "topic_page_url": "/math/geometry/quadrilaterals-and-polygons", "extended_slug": "math/geometry/quadrilaterals-and-polygons", "kind": "Topic", "slug": "quadrilaterals-and-polygons"}, {"icon_src": "/images/power-mode/badges/transformations-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/transformations/", "id": "transformations", "hide": false, "title": "Transformations", "child_data": [{"kind": "Topic", "id": "xfb23d09d"}, {"kind": "Topic", "id": "xd02b6a6e"}, {"kind": "Topic", "id": "x3d069f5b"}, {"kind": "Topic", "id": "x65730498"}, {"kind": "Topic", "id": "x55f0a6c6"}, {"kind": "Topic", "id": "xd229a980"}, {"kind": "Topic", "id": "xadfc04b3"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/transformations/rigid-transformations-intro/", "id": "rigid-transformations-intro", "hide": false, "title": "Introduction to rigid transformations", "child_data": [{"kind": "Video", "id": "x7856e9c3"}, {"kind": "Video", "id": "x1e570b55"}, {"kind": "Exercise", "id": "x73c74d82"}, {"kind": "Video", "id": "x2d3daf59"}, {"kind": "Exercise", "id": "xc4fb61cc"}, {"kind": "Video", "id": "xd4398860"}, {"kind": "Exercise", "id": "xbdeb6941"}], "children": [{"path": "khan/math/geometry/transformations/rigid-transformations-intro/introduction-to-transformations/", "id": "XiAoUDfrar0", "title": "Introduction to geometric transformations", "kind": "Video", "description": "Sal introduces geometric transformations! Specifically, he explains what the \"image\" of a transformations is, what are the \"rigid\" transformations, and which transformations are not rigid.", "slug": "introduction-to-transformations"}, {"path": "khan/math/geometry/transformations/rigid-transformations-intro/translation-example/", "id": "oxSzkIftog8", "title": "How to perform a translation (example)", "kind": "Video", "description": "Sal shows how to perform a translation on a triangle using our interactive widget!", "slug": "translation-example"}, {"path": "khan/math/geometry/transformations/rigid-transformations-intro/performing-translations-on-the-coordinate-plane/", "id": "performing-translations-on-the-coordinate-plane", "title": "Perform translations", "description": "Use the interactive transformation tool to perform translations.", "slug": "performing-translations-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/geometry/transformations/rigid-transformations-intro/using-rotation-widget/", "id": "UKM8BnpZr94", "title": "How to perform a rotation (example)", "kind": "Video", "description": "Sal shows how to perform a rotation on a pentagon using our interactive widget!", "slug": "using-rotation-widget"}, {"path": "khan/math/geometry/transformations/rigid-transformations-intro/performing-rotations-on-the-coordinate-plane/", "id": "performing-rotations-on-the-coordinate-plane", "title": "Perform rotations", "description": "Use the interactive transformation tool to perform rotations.", "slug": "performing-rotations-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/geometry/transformations/rigid-transformations-intro/using-reflection-tool/", "id": "RLyXTj2j_c4", "title": "How to perform a reflection (example)", "kind": "Video", "description": "Sal shows how to perform a reflection on a quadrilateral using our interactive widget!", "slug": "using-reflection-tool"}, {"path": "khan/math/geometry/transformations/rigid-transformations-intro/performing-reflections-on-the-coordinate-plane/", "id": "performing-reflections-on-the-coordinate-plane", "title": "Perform reflections", "description": "Use the interactive transformation tool to perform reflections.", "slug": "performing-reflections-on-the-coordinate-plane", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The three rigid transformations are translations, rotations, and reflections. Get to know them and gain some experience in performing them on different figures.", "node_slug": "rigid-transformations-intro", "render_type": "Tutorial", "topic_page_url": "/math/geometry/transformations/rigid-transformations-intro", "extended_slug": "math/geometry/transformations/rigid-transformations-intro", "kind": "Topic", "slug": "rigid-transformations-intro"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/transformations/hs-geo-translations/", "id": "hs-geo-translations", "hide": false, "title": "Translations", "child_data": [{"kind": "Video", "id": "x38f28d5c"}, {"kind": "Exercise", "id": "xdf41b006"}, {"kind": "Video", "id": "x4435dc5a"}, {"kind": "Video", "id": "x03952f21"}, {"kind": "Exercise", "id": "xe837b7c1"}], "children": [{"path": "khan/math/geometry/transformations/hs-geo-translations/formal-translation-tool-example/", "id": "BrYEuO7fwMw", "title": "How to find the translation that maps a given figure to another (example)", "kind": "Video", "description": "Sal is given two triangles on the coordinate plane, and determines the translation that maps one of them into the other.", "slug": "formal-translation-tool-example"}, {"path": "khan/math/geometry/transformations/hs-geo-translations/defining-translations/", "id": "defining-translations", "title": "Find the translation that maps a given figure to another", "description": "Given two figures on the coordinate plane, find the formal definition of the translation that takes one figure to another.", "slug": "defining-translations", "kind": "Exercise"}, {"path": "khan/math/geometry/transformations/hs-geo-translations/determing-a-translation-between-points/", "id": "nV8taxEW8-0", "title": "How to find the image of a point under a translation, given another image (example)", "kind": "Video", "description": "Sal solves the following problem:\nA translation acting on the coordinate plane takes the point (-169,434) to point (-203, -68). What are the coordinates of the image of point (31, -529) under this translation?", "slug": "determing-a-translation-between-points"}, {"path": "khan/math/geometry/transformations/hs-geo-translations/drawing-image-of-translation/", "id": "g_ijRF_NMLk", "title": "How to draw the image of a translation (example)", "kind": "Video", "description": "Sal is given a triangle on the coordinate plane and the definition of a translation, and he draws the image of the triangle under that dilation.", "slug": "drawing-image-of-translation"}, {"path": "khan/math/geometry/transformations/hs-geo-translations/translations/", "id": "translations", "title": "Draw the image of a translation", "description": "Given a figure and a definition of a translation, manually draw the image.", "slug": "translations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to find the translation that maps a given figure to another, and how to manually draw the image of a translation.", "node_slug": "hs-geo-translations", "render_type": "Tutorial", "topic_page_url": "/math/geometry/transformations/hs-geo-translations", "extended_slug": "math/geometry/transformations/hs-geo-translations", "kind": "Topic", "slug": "hs-geo-translations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/transformations/hs-geo-rotations/", "id": "hs-geo-rotations", "hide": false, "title": "Rotations", "child_data": [{"kind": "Video", "id": "x5a934725"}, {"kind": "Exercise", "id": "xfacc58e4"}, {"kind": "Video", "id": "xd0c722ed"}, {"kind": "Exercise", "id": "x69ab4f87"}, {"kind": "Video", "id": "xd2c751b0"}, {"kind": "Exercise", "id": "x5155ba81"}], "children": [{"path": "khan/math/geometry/transformations/hs-geo-rotations/defining-rotation-example/", "id": "UFRAHIvCtzg", "title": "How to find the angle of the rotation that maps a given figure to another (example)", "kind": "Video", "description": "Sal is given two pairs of line segments and a center of a dilation. He finds the angle for the rotation that maps one pair of segments to another.", "slug": "defining-rotation-example"}, {"path": "khan/math/geometry/transformations/hs-geo-rotations/defining-rotations/", "id": "defining-rotations", "title": "Find the rotation that maps one figure to another", "description": "Given a figure on the coordinate plane and a center of a dilation, find the angle for the rotation that maps one figure to the other.", "slug": "defining-rotations", "kind": "Exercise"}, {"path": "khan/math/geometry/transformations/hs-geo-rotations/points-after-rotation/", "id": "6nUMiJfHLSA", "title": "How the draw the image of a rotation about the origin (example)", "kind": "Video", "description": "Sal is given a triangle on the coordinate plane and the definition of a rotation about the origin, and he manually draws the image of that rotation.", "slug": "points-after-rotation"}, {"path": "khan/math/geometry/transformations/hs-geo-rotations/rotations-1/", "id": "rotations-1", "title": "Draw the image of a rotation about the origin", "description": "Given a figure on the coordinate plane and the definition of a rotation about the origin, manually draw the image of that rotation.", "slug": "rotations-1", "kind": "Exercise"}, {"path": "khan/math/geometry/transformations/hs-geo-rotations/rotating-about-arbitrary-point/", "id": "uuDQkhx6TAI", "title": "How the draw the image of a rotation about an arbitrary point (example)", "kind": "Video", "description": "Sal is given a triangle on the coordinate plane and the definition of a rotation about an arbitrary point, and he manually draws the image of that rotation.", "slug": "rotating-about-arbitrary-point"}, {"path": "khan/math/geometry/transformations/hs-geo-rotations/rotations-2/", "id": "rotations-2", "title": "Draw the image of a rotation about an arbitrary point", "description": "Given a figure on the coordinate plane and the definition of a rotation about an arbitrary point, manually draw the image of that rotation.", "slug": "rotations-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to find the rotation that maps a given figure to another, and how to manually draw the image of a rotation.", "node_slug": "hs-geo-rotations", "render_type": "Tutorial", "topic_page_url": "/math/geometry/transformations/hs-geo-rotations", "extended_slug": "math/geometry/transformations/hs-geo-rotations", "kind": "Topic", "slug": "hs-geo-rotations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/transformations/hs-geo-reflections/", "id": "hs-geo-reflections", "hide": false, "title": "Reflections", "child_data": [{"kind": "Video", "id": "x2d79cf1a"}, {"kind": "Exercise", "id": "x3f9c30ea"}, {"kind": "Video", "id": "x135a8040"}, {"kind": "Exercise", "id": "x53e22195"}, {"kind": "Exercise", "id": "x43c2402d"}], "children": [{"path": "khan/math/geometry/transformations/hs-geo-reflections/points-on-line-of-reflection/", "id": "63mWxNXQQAk", "title": "How to find the reflection that maps a given figure to another (example)", "kind": "Video", "description": "Sal is given two line segments on the coordinate plane, and determines the reflection that maps one of them into the other.", "slug": "points-on-line-of-reflection"}, {"path": "khan/math/geometry/transformations/hs-geo-reflections/defining-reflections/", "id": "defining-reflections", "title": "Find the reflection that maps a given figure to another", "description": "Given two figures on the coordinate plane, find the formal definition of the reflection that takes one figure to another.", "slug": "defining-reflections", "kind": "Exercise"}, {"path": "khan/math/geometry/transformations/hs-geo-reflections/reflecting-segments-over-line/", "id": "kj3ZfOQGKdE", "title": "How to draw the image of a reflection (example)", "kind": "Video", "description": "Sal is given two line segments on the coordinate plane and the definition of a translation, and he draws the image of the segments under that reflection.", "slug": "reflecting-segments-over-line"}, {"path": "khan/math/geometry/transformations/hs-geo-reflections/reflections-1/", "id": "reflections-1", "title": "Draw the image of a reflection", "description": "Given a figure and a definition of a reflection, manually draw the image.", "slug": "reflections-1", "kind": "Exercise"}, {"path": "khan/math/geometry/transformations/hs-geo-reflections/reflections-2/", "id": "reflections-2", "title": "Advanced reflections", "description": "Find the reflection that maps a given figure to another and draw the image of a reflection. The lines of reflection in this exercise have a wide range of slopes.", "slug": "reflections-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to find the reflection that maps a given figure to another, and how to manually draw the image of a reflection.", "node_slug": "hs-geo-reflections", "render_type": "Tutorial", "topic_page_url": "/math/geometry/transformations/hs-geo-reflections", "extended_slug": "math/geometry/transformations/hs-geo-reflections", "kind": "Topic", "slug": "hs-geo-reflections"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/transformations/dilations-scaling/", "id": "dilations-scaling", "hide": false, "title": "Dilations or scaling around a point", "child_data": [{"kind": "Video", "id": "xd85b2957"}, {"kind": "Exercise", "id": "xa5ae2f47"}, {"kind": "Video", "id": "xa41fb2ec"}, {"kind": "Exercise", "id": "xd1399ddd"}, {"kind": "Exercise", "id": "x55264a3a"}, {"kind": "Video", "id": "x86399361"}, {"kind": "Video", "id": "x1854dd51"}, {"kind": "Exercise", "id": "x9801d788"}], "children": [{"path": "khan/math/geometry/transformations/dilations-scaling/dilating-from-an-arbitrary-point-example/", "id": "j5xis6Hlnds", "title": "How to perform a dilation (example)", "kind": "Video", "description": "Sal shows how to perform a dilation on a hexagon using our interactive widget!", "slug": "dilating-from-an-arbitrary-point-example"}, {"path": "khan/math/geometry/transformations/dilations-scaling/performing-dilations/", "id": "performing-dilations", "title": "Perform dilations", "description": "Use the interactive transformation tool to perform dilations.", "slug": "performing-dilations", "kind": "Exercise"}, {"path": "khan/math/geometry/transformations/dilations-scaling/dilating-one-line-onto-another/", "id": "jq6WFvMikBQ", "title": "How to map a given line into another using a dilation (example)", "kind": "Video", "description": "Sal shows how we can use dilations to map a line into another, parallel, line.", "slug": "dilating-one-line-onto-another"}, {"path": "khan/math/geometry/transformations/dilations-scaling/defining-dilations/", "id": "defining-dilations", "title": "Find the dilation that maps a given figure to another (basic)", "description": "Either find the scale factor or the center of a dilation that maps a given figure into another. Map a line into a different parallel line using dilations.", "slug": "defining-dilations", "kind": "Exercise"}, {"path": "khan/math/geometry/transformations/dilations-scaling/defining-dilations-2/", "id": "defining-dilations-2", "title": "Find the dilation that maps a given figure to another (advanced)", "description": "Find both the center and the scale factor of a dilation that maps a given figure to another one.", "slug": "defining-dilations-2", "kind": "Exercise"}, {"path": "khan/math/geometry/transformations/dilations-scaling/scaling-down-a-triangle-by-half/", "id": "qlWZJ21O63s", "title": "How to draw the image of a shrinking dilation about the origin (example)", "kind": "Video", "description": "Sal is given a triangle on the coordinate plane and he draws the image of the triangle under a dilation with scale factor 1/2 about the origin.", "slug": "scaling-down-a-triangle-by-half"}, {"path": "khan/math/geometry/transformations/dilations-scaling/thinking-about-dilations/", "id": "6dyWKD_JPhI", "title": "How to draw the image of an expanding dilation about an arbitrary point (example)", "kind": "Video", "description": "Sal is given a rectangle on the coordinate plane and he draws the image of the rectangle under a dilation with scale factor 1 2/3 about an arbitrary point.", "slug": "thinking-about-dilations"}, {"path": "khan/math/geometry/transformations/dilations-scaling/dilations/", "id": "dilations", "title": "Draw the image of a dilation", "description": "Given a figure and a definition of a dilation, manually draw the image.", "slug": "dilations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In addition to the three rigid transformation, there are the dilations, which expand or shrink figures while keeping the same proportions. These are extremely important in the subject of Similarity!\n\nGain experience by performing dilation, learn how to find the dilation that maps a given figure to another, and learn how to manually draw the image of a dilation.", "node_slug": "dilations-scaling", "render_type": "Tutorial", "topic_page_url": "/math/geometry/transformations/dilations-scaling", "extended_slug": "math/geometry/transformations/dilations-scaling", "kind": "Topic", "slug": "dilations-scaling"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/transformations/properties-definitions-of-translations/", "id": "properties-definitions-of-translations", "hide": false, "title": "Properties and definitions of transformations", "child_data": [{"kind": "Video", "id": "x70ee9a30"}, {"kind": "Exercise", "id": "x9ec0c1bd"}], "children": [{"path": "khan/math/geometry/transformations/properties-definitions-of-translations/possible-transformations-example/", "id": "_eAWDuLYVfg", "title": "How to determine the type of transformation according to points and their images (example)", "kind": "Video", "description": "Sal is given information about a transformation in terms of a few pairs of points and their corresponding images, and he determines what kind of transformation it can be.", "slug": "possible-transformations-example"}, {"path": "khan/math/geometry/transformations/properties-definitions-of-translations/qualitatively-defining-rigid-transformations/", "id": "qualitatively-defining-rigid-transformations", "title": "Precisely defining rigid transformations", "description": "Use your knowledge about the precise descriptions of the rigid transformations and their properties in various situations.", "slug": "qualitatively-defining-rigid-transformations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's continue our deep voyage through the world of transformations! Use your knowledge about the precise descriptions of the rigid transformations and their properties in various situations.", "node_slug": "properties-definitions-of-translations", "render_type": "Tutorial", "topic_page_url": "/math/geometry/transformations/properties-definitions-of-translations", "extended_slug": "math/geometry/transformations/properties-definitions-of-translations", "kind": "Topic", "slug": "properties-definitions-of-translations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/transformations/transformations-symmetry/", "id": "transformations-symmetry", "hide": false, "title": "Symmetry", "child_data": [{"kind": "Video", "id": "x78b40eae"}, {"kind": "Video", "id": "x6918834b"}, {"kind": "Video", "id": "x2bf83c62"}, {"kind": "Video", "id": "x16ace6c3"}, {"kind": "Exercise", "id": "x8bd33d7c"}], "children": [{"path": "khan/math/geometry/transformations/transformations-symmetry/axis-of-symmetry/", "id": "LrTn4cvsewk", "title": "Introduction to reflective symmetry", "kind": "Video", "description": "Sal introduces the concept of an \"axis of symmetry.\"", "slug": "axis-of-symmetry"}, {"path": "khan/math/geometry/transformations/transformations-symmetry/example-rotating-polygons/", "id": "P35LyN9g0oI", "title": "Introduction to rotational symmetry", "kind": "Video", "description": "Sal checks whether various figure are symmetrical under a 180 degrees rotation.", "slug": "example-rotating-polygons"}, {"path": "khan/math/geometry/transformations/transformations-symmetry/constructing-quad-based-on-symmetry/", "id": "-nufZ41Kg5c", "title": "How to construct a quadrilateral based on its line of symmetry (example)", "kind": "Video", "description": "Sal solves the following problem:\n\nTwo of the points that define a certain quadrilateral are (0,9) and (3,4). The quadrilateral has reflective symmetry over the line y=3-x. Draw and classify the quadrilateral.", "slug": "constructing-quad-based-on-symmetry"}, {"path": "khan/math/geometry/transformations/transformations-symmetry/reflecting-across-two-lines/", "id": "ANnuQZyEKVo", "title": "How to construct a quadrilateral based on its two lines of symmetry (example)", "kind": "Video", "description": "Sal solves the following problem:\n\nTwo of the points that define a certain quadrilateral are (-4,-2) and (0,5). The quadrilateral has a\u00a0reflective symmetry over the lines y=x/2 and\u00a0y=-2x + 5.\u00a0Draw and classify the quadrilateral.", "slug": "reflecting-across-two-lines"}, {"path": "khan/math/geometry/transformations/transformations-symmetry/symmetry-of-two-dimensional-shapes/", "id": "symmetry-of-two-dimensional-shapes", "title": "Symmetry of two-dimensional shapes", "description": "Analyze various shapes according to their reflective and rotational symmetries.", "slug": "symmetry-of-two-dimensional-shapes", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn about different kinds of symmetries of two-dimensional shapes, and analyze various shapes according to their symmetries.", "node_slug": "transformations-symmetry", "render_type": "Tutorial", "topic_page_url": "/math/geometry/transformations/transformations-symmetry", "extended_slug": "math/geometry/transformations/transformations-symmetry", "kind": "Topic", "slug": "transformations-symmetry"}], "in_knowledge_map": false, "description": "In this topic you will learn about the most useful math concept for creating video game graphics: geometric transformations, specifically translations, rotations, reflections, and dilations.\n\nYou will learn how to perform the transformations, and how to map one figure into another using these transformations.", "node_slug": "transformations", "render_type": "Topic", "topic_page_url": "/math/geometry/transformations", "extended_slug": "math/geometry/transformations", "kind": "Topic", "slug": "transformations"}, {"icon_src": "/images/power-mode/badges/congruent-triangles-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/congruence/", "id": "congruence", "hide": false, "title": "Congruence", "child_data": [{"kind": "Topic", "id": "x610592d3"}, {"kind": "Topic", "id": "xda5e2eb7"}, {"kind": "Topic", "id": "x10da1211"}, {"kind": "Topic", "id": "x96bc9434"}, {"kind": "Topic", "id": "x0ebb1835"}, {"kind": "Topic", "id": "x27d5672d"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/congruence/transformations-congruence/", "id": "transformations-congruence", "hide": false, "title": "Transformations and congruence", "child_data": [{"kind": "Video", "id": "xdfa0c35c"}, {"kind": "Video", "id": "x5172fee3"}, {"kind": "Exercise", "id": "x70bbe456"}, {"kind": "Video", "id": "x025ec7a0"}, {"kind": "Video", "id": "x9decccc6"}, {"kind": "Exercise", "id": "xa58c2ef8"}], "children": [{"path": "khan/math/geometry/congruence/transformations-congruence/testing-congruence-by-transformations-example/", "id": "Tn9U8hLu9aI", "title": "How to determine that two figures are congruent (example)", "kind": "Video", "description": "Sal shows that a given pair of pentagons are congruent by mapping one onto the other using rigid transformations.", "slug": "testing-congruence-by-transformations-example"}, {"path": "khan/math/geometry/congruence/transformations-congruence/another-congruence-by-transformation-example/", "id": "EDlZAyhWxhk", "title": "How to determine that two figures are not congruent (example)", "kind": "Video", "description": "Sal shows that a given pair of pentagons are not congruent by showing it's not possible to map one onto the other using rigid transformations.", "slug": "another-congruence-by-transformation-example"}, {"path": "khan/math/geometry/congruence/transformations-congruence/exploring-rigid-transformations-and-congruence/", "id": "exploring-rigid-transformations-and-congruence", "title": "Determine whether two figures are congruent", "description": "Given a pair of figures in the coordinate plane, try to map one onto the other and determine whether they are congruent.", "slug": "exploring-rigid-transformations-and-congruence", "kind": "Exercise"}, {"path": "khan/math/geometry/congruence/transformations-congruence/example-of-rigid-transformation-and-congruence/", "id": "3aDV3L8aZtY", "title": "How to perform a sequence of transformations (example)", "kind": "Video", "description": "Sal reflects and then translates a given pentagon, and determines whether the resulting figure is congruent to the source figure.", "slug": "example-of-rigid-transformation-and-congruence"}, {"path": "khan/math/geometry/congruence/transformations-congruence/another-example-of-rigid-transformations-for-congruence/", "id": "vO1Ur38PGCY", "title": "How to map one figure onto another using a sequence of transformations (example)", "kind": "Video", "description": "Sal maps a given quadrilateral onto another using a translation, a dilation, and a reflection. The quadrilaterals are not congruent because a dilation was used.", "slug": "another-example-of-rigid-transformations-for-congruence"}, {"path": "khan/math/geometry/congruence/transformations-congruence/defining-congruence-through-rigid-transformations/", "id": "defining-congruence-through-rigid-transformations", "title": "Perform sequences of transformations and determine congruence", "description": "Practice the relationship between rigid transformations and congruence through advanced problems.", "slug": "defining-congruence-through-rigid-transformations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Two figures are congruent if you can go from one to another through some combination of translations, reflections and rotations. In this tutorial, we'll really internalize this by working through the actual transformations.", "node_slug": "transformations-congruence", "render_type": "Tutorial", "topic_page_url": "/math/geometry/congruence/transformations-congruence", "extended_slug": "math/geometry/congruence/transformations-congruence", "kind": "Topic", "slug": "transformations-congruence"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/congruence/triangle-congruence/", "id": "triangle-congruence", "hide": false, "title": "Triangle congruence", "child_data": [{"kind": "Video", "id": "267245528"}, {"kind": "Video", "id": "267245529"}, {"kind": "Video", "id": "274218421"}, {"kind": "Exercise", "id": "348091349"}, {"kind": "Video", "id": "274218420"}, {"kind": "Exercise", "id": "251567894"}], "children": [{"path": "khan/math/geometry/congruence/triangle-congruence/congruent-triangles-and-sss/", "id": "CJrVOf_3dN0", "title": "Congruent triangles and the SSS postulate/criterion", "kind": "Video", "description": "Sal explains what it means for triangles to be congruent and what is a postulate/axiom. He also presents the SSS congruence postulate/criterion and its justification.", "slug": "congruent-triangles-and-sss"}, {"path": "khan/math/geometry/congruence/triangle-congruence/other-triangle-congruence-postulates/", "id": "8Ld8Csu4sEs", "title": "All triangle congruence postulates/criteria", "kind": "Video", "description": "Sal introduces and justifies the SSS, SAS, ASA and AAS postulates for congruent triangles. He also shows that AAA is only good for similarity. For SSA, better to watch next video.", "slug": "other-triangle-congruence-postulates"}, {"path": "khan/math/geometry/congruence/triangle-congruence/more-on-why-ssa-is-not-a-postulate/", "id": "f8svAm237xM", "title": "Why SSA is not a congruence postulate/criterion", "kind": "Video", "description": "There are some cases when SSA can imply triangle congruence, but not always. This is why it's not like the other triangle congruence postulates/criteria.", "slug": "more-on-why-ssa-is-not-a-postulate"}, {"path": "khan/math/geometry/congruence/triangle-congruence/congruency_postulates/", "id": "congruency_postulates", "title": "Reason about the triangle congruence postulates", "description": "Discover why some of the triangle criteria imply triangle congruence while some don't.", "slug": "congruency_postulates", "kind": "Exercise"}, {"path": "khan/math/geometry/congruence/triangle-congruence/finding-congruent-triangles/", "id": "d5UCZ9hO8X4", "title": "How to determine whether two triangle are congruent (example)", "kind": "Video", "description": "Sal uses the SSS, ASA, SAS, and AAS postulates to find congruent triangles.", "slug": "finding-congruent-triangles"}, {"path": "khan/math/geometry/congruence/triangle-congruence/congruent_triangles_1/", "id": "congruent_triangles_1", "title": "Determine whether two triangles are congruent", "description": "Use the triangle congruence criteria SSS, SAS, ASA, and AAS to determine that two triangles are congruent.", "slug": "congruent_triangles_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how the definition of congruence using rigid transformations can be simplified to simple criteria when studying congruent triangles.", "node_slug": "triangle-congruence", "render_type": "Tutorial", "topic_page_url": "/math/geometry/congruence/triangle-congruence", "extended_slug": "math/geometry/congruence/triangle-congruence", "kind": "Topic", "slug": "triangle-congruence"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/congruence/theorems-concerning-triangle-properties/", "id": "theorems-concerning-triangle-properties", "hide": false, "title": "Theorems concerning triangle properties", "child_data": [{"kind": "Video", "id": "265540637"}, {"kind": "Video", "id": "281570417"}, {"kind": "Video", "id": "281570421"}], "children": [{"path": "khan/math/geometry/congruence/theorems-concerning-triangle-properties/proof-sum-of-measures-of-angles-in-a-triangle-are-180/", "id": "6s1CI3uuhko", "title": "Proof: Measures of interior angles of a triangle sum to 180\u00b0", "kind": "Video", "description": "Sal gives a formal proof that the\u00a0measures of interior angles of a triangle sum to 180\u00b0.", "slug": "proof-sum-of-measures-of-angles-in-a-triangle-are-180"}, {"path": "khan/math/geometry/congruence/theorems-concerning-triangle-properties/congruent-legs-and-base-angles-of-isosceles-triangles/", "id": "7UISwx2Mr4c", "title": "Proofs concerning isosceles triangles", "kind": "Video", "description": "Sal proves that\u00a0the base angles in isosceles triangles are congruent, and conversely, that triangles with congruent base angles are isosceles. He also proves that\u00a0the perpendicular to the base of an isosceles triangle bisects it.", "slug": "congruent-legs-and-base-angles-of-isosceles-triangles"}, {"path": "khan/math/geometry/congruence/theorems-concerning-triangle-properties/equilateral-triangle-sides-and-angles-congruent/", "id": "CYNUwiUzlPk", "title": "Proofs concerning equilateral triangles", "kind": "Video", "description": "Sal proves that\u00a0the angles of an equilateral triangle are all congruent (and therefore they all measure 60\u00b0), and conversely, that triangles with all congruent angles are equilateral.", "slug": "equilateral-triangle-sides-and-angles-congruent"}], "in_knowledge_map": false, "description": "Now that we know how to show that two triangles are congruent, let's put that to use by proving some theorems about triangles.", "node_slug": "theorems-concerning-triangle-properties", "render_type": "Tutorial", "topic_page_url": "/math/geometry/congruence/theorems-concerning-triangle-properties", "extended_slug": "math/geometry/congruence/theorems-concerning-triangle-properties", "kind": "Topic", "slug": "theorems-concerning-triangle-properties"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/congruence/working-with-triangles/", "id": "working-with-triangles", "hide": false, "title": "Working with triangles", "child_data": [{"kind": "Video", "id": "281570422"}, {"kind": "Exercise", "id": "251580500"}, {"kind": "Video", "id": "281570418"}, {"kind": "Video", "id": "281570420"}, {"kind": "Video", "id": "281570419"}, {"kind": "Exercise", "id": "251591675"}], "children": [{"path": "khan/math/geometry/congruence/working-with-triangles/figuring-out-all-the-angles-for-congruent-triangles-example/", "id": "aDCXPdzyS0s", "title": "How to find corresponding angles in congruent triangles (example)", "kind": "Video", "description": "We write the letters of congruent triangles so their order tells us which parts of corresponding. In this video, Sal uses this notation to solve some angles.", "slug": "figuring-out-all-the-angles-for-congruent-triangles-example"}, {"path": "khan/math/geometry/congruence/working-with-triangles/congruent_triangles_2/", "id": "congruent_triangles_2", "title": "Find missing angles of congruent triangles", "description": "Given two triangles, determine whether they are congruent and use that to find missing angle measures.", "slug": "congruent_triangles_2", "kind": "Exercise"}, {"path": "khan/math/geometry/congruence/working-with-triangles/equilateral-and-isosceles-example-problems/", "id": "7FTNWE7RTfQ", "title": "How to solve triangles using properties of isosceles and equilateral triangles (example)", "kind": "Video", "description": "Three example problems involving isosceles and equilateral triangles (partly taken from Art of Problem Solving, by Richard Rusczyk).", "slug": "equilateral-and-isosceles-example-problems"}, {"path": "khan/math/geometry/congruence/working-with-triangles/another-isosceles-example-problem/", "id": "ceDV0QBpcMA", "title": "How to solve an isosceles triangle using algebra (example)", "kind": "Video", "description": "Sal solves the following problem: The measures of two angles of an isosceles triangle are 3x+5 and x+16. Find all possible values of x.", "slug": "another-isosceles-example-problem"}, {"path": "khan/math/geometry/congruence/working-with-triangles/example-involving-an-isosceles-triangle-and-parallel-lines/", "id": "CVKAro3HUxQ", "title": "How to solve an isosceles triangle using algebra (example)", "kind": "Video", "description": "Sal combines what we know about isosceles triangles and parallel lines with the power of algebra to solve the angles of an isosceles triangle.", "slug": "example-involving-an-isosceles-triangle-and-parallel-lines"}, {"path": "khan/math/geometry/congruence/working-with-triangles/triangle_angles_1/", "id": "triangle_angles_1", "title": "Find missing angles of triangles", "description": "Find missing angle measures in triangles using the properties of general triangles, isosceles triangles, and equilateral triangles.", "slug": "triangle_angles_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to solve different geometric problems using triangle congruence.", "node_slug": "working-with-triangles", "render_type": "Tutorial", "topic_page_url": "/math/geometry/congruence/working-with-triangles", "extended_slug": "math/geometry/congruence/working-with-triangles", "kind": "Topic", "slug": "working-with-triangles"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/", "id": "theorems-concerning-parallelogram-properties", "hide": false, "title": "Theorems concerning quadrilateral properties", "child_data": [{"kind": "Video", "id": "348974659"}, {"kind": "Video", "id": "348974660"}, {"kind": "Video", "id": "348974657"}, {"kind": "Video", "id": "267245527"}, {"kind": "Video", "id": "348974658"}, {"kind": "Video", "id": "351468822"}], "children": [{"path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/proof-opposite-sides-of-parallelogram-congruent/", "id": "LhrGS4-Dd9I", "title": "Proof: Opposite sides of a parallelogram are congruent (and conversely)", "kind": "Video", "description": "Sal proves that a figure is a parallelogram if and only if opposite sides are congruent.", "slug": "proof-opposite-sides-of-parallelogram-congruent"}, {"path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/proof-diagonals-of-a-parallelogram-bisect-each-other/", "id": "TErJ-Yr67BI", "title": "Proof: The diagonals of a parallelogram bisect each other (and conversely)", "kind": "Video", "description": "Sal proves that a quadrilateral is a parallelogram if and only if its diagonals bisect each other.", "slug": "proof-diagonals-of-a-parallelogram-bisect-each-other"}, {"path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/proof-opposite-angles-of-parallelogram-congruent/", "id": "oIV1zM8qlpk", "title": "Proof: Opposite angles of parallelogram are congruent", "kind": "Video", "description": "Sal proves that opposite angles of a parallelogram are congruent.", "slug": "proof-opposite-angles-of-parallelogram-congruent"}, {"path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/two-column-proof-showing-segments-are-perpendicular/", "id": "fSu1LKnhM5Q", "title": "Proof: The diagonals of a kite are perpendicular", "kind": "Video", "description": "Sal proves that the diagonals of a kite are perpendicular, by using the SSS and SAS triangle congruence criteria.", "slug": "two-column-proof-showing-segments-are-perpendicular"}, {"path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/proof-rhombus-diagonals-are-perpendicular-bisectors/", "id": "GDcVdBAnBdU", "title": "Proof: Rhombus diagonals are perpendicular bisectors of each other", "kind": "Video", "description": "Sal proves that the diagonals of a rhombus are perpendicular, and that they intersect at the midpoints of both.", "slug": "proof-rhombus-diagonals-are-perpendicular-bisectors"}, {"path": "khan/math/geometry/congruence/theorems-concerning-parallelogram-properties/proof-rhombus-area-half-product-of-diagonal-length/", "id": "3FManXv4mZM", "title": "Proof: Rhombus area is half the product of the lengths of its diagonals", "kind": "Video", "description": "Sal proves that we can find the area of a rhombus by taking half the product of the lengths of the diagonals.", "slug": "proof-rhombus-area-half-product-of-diagonal-length"}], "in_knowledge_map": false, "description": "Triangle congruence is not only useful when working with triangles, it's also useful with any other kind of polygon! Prove a few theorems about the properties of parallelograms using triangle congruence.", "node_slug": "theorems-concerning-parallelogram-properties", "render_type": "Tutorial", "topic_page_url": "/math/geometry/congruence/theorems-concerning-parallelogram-properties", "extended_slug": "math/geometry/congruence/theorems-concerning-parallelogram-properties", "kind": "Topic", "slug": "theorems-concerning-parallelogram-properties"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/congruence/theorems-using-triangle-congruence/", "id": "theorems-using-triangle-congruence", "hide": false, "title": "Proofs of general theorems that use triangle congruence", "child_data": [{"kind": "Video", "id": "274218423"}, {"kind": "Video", "id": "274218422"}, {"kind": "Video", "id": "353965912"}], "children": [{"path": "khan/math/geometry/congruence/theorems-using-triangle-congruence/congruent-triangle-proof-example/", "id": "RFesGHsuFZw", "title": "How to prove general theorems using triangle congruence (example)", "kind": "Video", "description": "Sal proves that a point is the midpoint of a segment using triangle congruence.", "slug": "congruent-triangle-proof-example"}, {"path": "khan/math/geometry/congruence/theorems-using-triangle-congruence/congruent-triangle-example-2/", "id": "Xc3oHzKXVh8", "title": "How to prove general theorems using triangle congruence (example)", "kind": "Video", "description": "Sal proves that two pairs of segments are congruent using the ASA and AAS congruence criteria.", "slug": "congruent-triangle-example-2"}, {"path": "khan/math/geometry/congruence/theorems-using-triangle-congruence/problem-involving-angle-derived-from-square-and-circle/", "id": "3n0LvI99-KM", "title": "How to prove general theorems using triangle congruence (example)", "kind": "Video", "description": "Sal finds a missing angle in a diagram that contains sector of a circle inscribed within a square.", "slug": "problem-involving-angle-derived-from-square-and-circle"}], "in_knowledge_map": false, "description": "Gain even more experience with using triangle congruence in proofs.", "node_slug": "theorems-using-triangle-congruence", "render_type": "Tutorial", "topic_page_url": "/math/geometry/congruence/theorems-using-triangle-congruence", "extended_slug": "math/geometry/congruence/theorems-using-triangle-congruence", "kind": "Topic", "slug": "theorems-using-triangle-congruence"}], "in_knowledge_map": false, "description": "Learn what it means for two figures to be congruent, and how to determine whether two figures are congruent or not. Use this immensely important concept to prove various geometric theorems about triangles and parallelograms.", "node_slug": "congruence", "render_type": "Topic", "topic_page_url": "/math/geometry/congruence", "extended_slug": "math/geometry/congruence", "kind": "Topic", "slug": "congruence"}, {"icon_src": "/images/power-mode/badges/similarity-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/similarity/", "id": "similarity", "hide": false, "title": "Similarity", "child_data": [{"kind": "Topic", "id": "x34c8b91a"}, {"kind": "Topic", "id": "x18c52c4a"}, {"kind": "Topic", "id": "x11e60080"}, {"kind": "Topic", "id": "x7135df58"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/similarity/similarity-and-transformations/", "id": "similarity-and-transformations", "hide": false, "title": "Similarity and transformations", "child_data": [{"kind": "Video", "id": "xfc5aad45"}, {"kind": "Exercise", "id": "xd977e63d"}, {"kind": "Video", "id": "x8f10a5e6"}, {"kind": "Exercise", "id": "x54acf077"}], "children": [{"path": "khan/math/geometry/similarity/similarity-and-transformations/testing-similarity-through-transformations/", "id": "6p1lweGactg", "title": "Testing similarity through transformations", "kind": "Video", "slug": "testing-similarity-through-transformations"}, {"path": "khan/math/geometry/similarity/similarity-and-transformations/exploring-angle-preserving-transformations-and-similarity/", "id": "exploring-angle-preserving-transformations-and-similarity", "title": "Exploring angle-preserving transformations and similarity", "slug": "exploring-angle-preserving-transformations-and-similarity", "kind": "Exercise"}, {"path": "khan/math/geometry/similarity/similarity-and-transformations/quadrilateral-similarity-by-showing-congruent-angles/", "id": "W-itq-SYw0I", "title": "Quadrilateral similarity by showing congruent angles", "kind": "Video", "slug": "quadrilateral-similarity-by-showing-congruent-angles"}, {"path": "khan/math/geometry/similarity/similarity-and-transformations/defining-similarity-through-angle-preserving-transformations/", "id": "defining-similarity-through-angle-preserving-transformations", "title": "Defining similarity through angle-preserving transformations", "slug": "defining-similarity-through-angle-preserving-transformations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Two figures are similar if you can get from one to another through some combinations of translations, reflections, rotations AND DILATIONS (so you can scale up and down). This tutorial helps give us an intuition for this.", "node_slug": "similarity-and-transformations", "render_type": "Tutorial", "topic_page_url": "/math/geometry/similarity/similarity-and-transformations", "extended_slug": "math/geometry/similarity/similarity-and-transformations", "kind": "Topic", "slug": "similarity-and-transformations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/similarity/triangle_similarlity/", "id": "triangle_similarlity", "hide": false, "title": "Triangle similarity", "child_data": [{"kind": "Video", "id": "284859451"}, {"kind": "Video", "id": "284859449"}, {"kind": "Exercise", "id": "251603956"}, {"kind": "Video", "id": "289578994"}, {"kind": "Exercise", "id": "574955549"}, {"kind": "Video", "id": "284859450"}, {"kind": "Exercise", "id": "575147721"}, {"kind": "Video", "id": "289578995"}, {"kind": "Exercise", "id": "729523853"}], "children": [{"path": "khan/math/geometry/similarity/triangle_similarlity/similar-triangle-basics/", "id": "9ThXDY9Y3oU", "title": "Similar triangle basics", "kind": "Video", "description": "Introduction to what it means for triangles to be similar", "slug": "similar-triangle-basics"}, {"path": "khan/math/geometry/similarity/triangle_similarlity/similarity-postulates/", "id": "7bO0TmJ6Ba4", "title": "Similarity postulates", "kind": "Video", "description": "Thinking about what we need to know to determine whether two triangles are similar", "slug": "similarity-postulates"}, {"path": "khan/math/geometry/similarity/triangle_similarlity/similar_triangles_1/", "id": "similar_triangles_1", "title": "Similar triangles 1", "slug": "similar_triangles_1", "kind": "Exercise"}, {"path": "khan/math/geometry/similarity/triangle_similarlity/similar-triangle-example-problems/", "id": "Ly86lwq_2gc", "title": "Similar triangle example problems", "kind": "Video", "description": "Multiple examples looking for similarity of triangles", "slug": "similar-triangle-example-problems"}, {"path": "khan/math/geometry/similarity/triangle_similarlity/similar_triangles_2/", "id": "similar_triangles_2", "title": "Similar triangles 2", "slug": "similar_triangles_2", "kind": "Exercise"}, {"path": "khan/math/geometry/similarity/triangle_similarlity/similarity-example-problems/", "id": "R-6CAr_zEEk", "title": "Similarity example problems", "kind": "Video", "description": "Two example problems involving similarity", "slug": "similarity-example-problems"}, {"path": "khan/math/geometry/similarity/triangle_similarlity/solving_similar_triangles_1/", "id": "solving_similar_triangles_1", "title": "Solving similar triangles 1", "slug": "solving_similar_triangles_1", "kind": "Exercise"}, {"path": "khan/math/geometry/similarity/triangle_similarlity/similarity-example-where-same-side-plays-different-roles/", "id": "Tal_fgREll0", "title": "Similarity example where same side plays different roles", "kind": "Video", "description": "The same side not corresponding to itself in two similar triangles", "slug": "similarity-example-where-same-side-plays-different-roles"}, {"path": "khan/math/geometry/similarity/triangle_similarlity/solving_similar_triangles_2/", "id": "solving_similar_triangles_2", "title": "Solving similar triangles 2", "slug": "solving_similar_triangles_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial explains a similar (but not congruent) idea to congruency (if that last sentence made sense, you might not need this tutorial). Seriously, we'll take a rigorous look at similarity and think of some reasonable postulates for it. We'll then use these to prove some results and solve some problems. The fun must not stop!", "node_slug": "triangle_similarlity", "render_type": "Tutorial", "topic_page_url": "/math/geometry/similarity/triangle_similarlity", "extended_slug": "math/geometry/similarity/triangle_similarlity", "kind": "Topic", "slug": "triangle_similarlity"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/similarity/cc-solving-prob-similar-tri/", "id": "cc-solving-prob-similar-tri", "hide": false, "title": "Solving problems with similar and congruent triangles", "child_data": [{"kind": "Video", "id": "290279019"}, {"kind": "Video", "id": "xeed4a573"}, {"kind": "Video", "id": "xd0f9f2e0"}, {"kind": "Video", "id": "xbb6e0621"}, {"kind": "Video", "id": "289578996"}, {"kind": "Exercise", "id": "x1cc28f9b"}], "children": [{"path": "khan/math/geometry/similarity/cc-solving-prob-similar-tri/finding-area-using-similarity-and-congruence/", "id": "EqNzr56h1Ic", "title": "Finding area using similarity and congruence", "kind": "Video", "description": "Example of using similarity and congruence to find the area of a triangle", "slug": "finding-area-using-similarity-and-congruence"}, {"path": "khan/math/geometry/similarity/cc-solving-prob-similar-tri/goldren-ratio-and-rembrandt-s-self-portrait/", "id": "v5SAMuRanGM", "title": "Golden ratio and Rembrandt's self portrait", "kind": "Video", "slug": "goldren-ratio-and-rembrandt-s-self-portrait"}, {"path": "khan/math/geometry/similarity/cc-solving-prob-similar-tri/triangle-similarity-in-pool/", "id": "MiyFReTAdCA", "title": "Triangle similarity in pool", "kind": "Video", "slug": "triangle-similarity-in-pool"}, {"path": "khan/math/geometry/similarity/cc-solving-prob-similar-tri/golden-ratio-to-find-radius-of-moon/", "id": "cnCQGKx6LhE", "title": "Golden ratio to find radius of moon", "kind": "Video", "slug": "golden-ratio-to-find-radius-of-moon"}, {"path": "khan/math/geometry/similarity/cc-solving-prob-similar-tri/challenging-similarity-problem/", "id": "7aGEvpHaNJ8", "title": "Challenging similarity problem", "kind": "Video", "description": "Interesting similarity problem where we don't have a lot of information to work with", "slug": "challenging-similarity-problem"}, {"path": "khan/math/geometry/similarity/cc-solving-prob-similar-tri/solving-problems-with-similar-and-congruent-triangles/", "id": "solving-problems-with-similar-and-congruent-triangles", "title": "Solving problems with similar and congruent triangles", "slug": "solving-problems-with-similar-and-congruent-triangles", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We spend a lot of time in geometry proving that triangles are congruent or similar. We now apply this ability to some really interesting problems (seriously, these are fun)!", "node_slug": "cc-solving-prob-similar-tri", "render_type": "Tutorial", "topic_page_url": "/math/geometry/similarity/cc-solving-prob-similar-tri", "extended_slug": "math/geometry/similarity/cc-solving-prob-similar-tri", "kind": "Topic", "slug": "cc-solving-prob-similar-tri"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/similarity/old_school_similarity/", "id": "old_school_similarity", "hide": false, "title": "Old school similarity", "child_data": [{"kind": "Video", "id": "24949"}, {"kind": "Video", "id": "24951"}], "children": [{"path": "khan/math/geometry/similarity/old_school_similarity/similar-triangles/", "id": "BI-rtfZVXy0", "title": "Similar triangles", "kind": "Video", "description": "Introduction to similar triangles", "slug": "similar-triangles"}, {"path": "khan/math/geometry/similarity/old_school_similarity/similar-triangles-part-2/", "id": "qO2cTx6DwCA", "title": "Similar triangles (part 2)", "kind": "Video", "description": "More on similar triangles", "slug": "similar-triangles-part-2"}], "in_knowledge_map": false, "description": "These videos may look similar (pun-intended) to videos in another playlist but they are older, rougher and arguably more charming. These are some of the original videos that Sal made on similarity. They are less formal than those in the \"other\" similarity tutorial, but, who knows, you might like them more.", "node_slug": "old_school_similarity", "render_type": "Tutorial", "topic_page_url": "/math/geometry/similarity/old_school_similarity", "extended_slug": "math/geometry/similarity/old_school_similarity", "kind": "Topic", "slug": "old_school_similarity"}], "in_knowledge_map": true, "description": "", "node_slug": "similarity", "render_type": "Topic", "topic_page_url": "/math/geometry/similarity", "extended_slug": "math/geometry/similarity", "kind": "Topic", "slug": "similarity"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/cc-geometry-circles/", "id": "cc-geometry-circles", "hide": false, "title": "Circles", "child_data": [{"kind": "Topic", "id": "x021a201c"}, {"kind": "Topic", "id": "xfa30682f"}, {"kind": "Topic", "id": "xa9a2d037"}, {"kind": "Topic", "id": "xaba194db"}], "children": [{"icon_src": "/images/power-mode/badges/circles-40x40.png", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/cc-geometry-circles/circles/", "id": "circles", "hide": false, "title": "Circle arcs and sectors", "child_data": [{"kind": "Video", "id": "261106564"}, {"kind": "Video", "id": "24957"}, {"kind": "Video", "id": "xb22c18d7"}, {"kind": "Video", "id": "x99baffff"}, {"kind": "Exercise", "id": "899036662"}, {"kind": "Video", "id": "x44915f06"}, {"kind": "Exercise", "id": "899081489"}], "children": [{"path": "khan/math/geometry/cc-geometry-circles/circles/language-and-notation-of-the-circle/", "id": "U2W7HPyC0cM", "title": "Language and notation of the circle", "kind": "Video", "description": "Formal definition of a circle. Tangent and secant lines. Diameters and radii. major and minor arcs", "slug": "language-and-notation-of-the-circle"}, {"path": "khan/math/geometry/cc-geometry-circles/circles/circles-radius-diameter-and-circumference/", "id": "jyLRpr2P0MQ", "title": "Circles: radius, diameter, circumference and Pi", "kind": "Video", "description": "Learn how the number Pi allows us to relate the radius, diameter, and circumference of a circle.", "slug": "circles-radius-diameter-and-circumference"}, {"path": "khan/math/geometry/cc-geometry-circles/circles/length-of-an-arc-that-subtends-a-central-angle/", "id": "tVcasOt55Lc", "title": "Length of an arc that subtends a central angle", "kind": "Video", "slug": "length-of-an-arc-that-subtends-a-central-angle"}, {"path": "khan/math/geometry/cc-geometry-circles/circles/finding-central-angle-measure-given-arc-length/", "id": "1BH2TNzAAik", "title": "Finding central angle measure given arc length", "kind": "Video", "slug": "finding-central-angle-measure-given-arc-length"}, {"path": "khan/math/geometry/cc-geometry-circles/circles/circles_and_arcs/", "id": "circles_and_arcs", "title": "Circles and arcs", "description": "Relate the length of an arc to the circumference of a whole circle.", "slug": "circles_and_arcs", "kind": "Exercise"}, {"path": "khan/math/geometry/cc-geometry-circles/circles/area-of-a-sector-given-a-central-angle/", "id": "u8JFdwmBvvQ", "title": "Area of a sector given a central angle", "kind": "Video", "slug": "area-of-a-sector-given-a-central-angle"}, {"path": "khan/math/geometry/cc-geometry-circles/circles/areas_of_circles_and_sectors/", "id": "areas_of_circles_and_sectors", "title": "Areas of circles and sectors", "description": "Relate the area of a sector to the area of a whole circle.", "slug": "areas_of_circles_and_sectors", "kind": "Exercise"}], "in_knowledge_map": true, "description": "This tutorial will review some of the basic of circles and then think about lengths of arcs and areas of sectors.", "node_slug": "circles", "render_type": "Tutorial", "topic_page_url": "/math/geometry/cc-geometry-circles/circles", "extended_slug": "math/geometry/cc-geometry-circles/circles", "kind": "Topic", "slug": "circles"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/", "id": "central-inscribed-circumscribed", "hide": false, "title": "Central, inscribed and circumscribed angles", "child_data": [{"kind": "Video", "id": "24977"}, {"kind": "Exercise", "id": "333650286"}, {"kind": "Video", "id": "xedc9cfc6"}, {"kind": "Video", "id": "x7b77bf0f"}, {"kind": "Video", "id": "x2218bca9"}, {"kind": "Exercise", "id": "x08222be0"}], "children": [{"path": "khan/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/inscribed-and-central-angles/", "id": "MyzGVbCHh5M", "title": "Inscribed and central angles", "kind": "Video", "description": "Showing that an inscribed angle is half of a central angle that subtends the same arc", "slug": "inscribed-and-central-angles"}, {"path": "khan/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/inscribed_angles_1/", "id": "inscribed_angles_1", "title": "Inscribed angles 1", "slug": "inscribed_angles_1", "kind": "Exercise"}, {"path": "khan/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/measure-of-circumscribed-angle/", "id": "ZiqHJwzv_HI", "title": "Measure of circumscribed angle", "kind": "Video", "slug": "measure-of-circumscribed-angle"}, {"path": "khan/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/example-with-tangent-and-radius/", "id": "KjQ1KN5GgoE", "title": "Example with tangent and radius", "kind": "Video", "slug": "example-with-tangent-and-radius"}, {"path": "khan/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/hypotenuse-of-right-triangle-inscribed-in-circle/", "id": "T971zHhZ3S4", "title": "Hypotenuse of right triangle inscribed in circle", "kind": "Video", "slug": "hypotenuse-of-right-triangle-inscribed-in-circle"}, {"path": "khan/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/central-inscribed-and-circumscribed-angles/", "id": "central--inscribed--and-circumscribed-angles", "title": "Central, inscribed, and circumscribed angles", "slug": "central-inscribed-and-circumscribed-angles", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We'll now dig a bit deeper in our understanding of circles by looking at central, inscribed and circumscribed angles. This is fun and beautiful as is, but you'll also see that it shows up on a lot of math standardized tests. Why do people like to put geometry like this on standardized tests? Because it shows deductive reasoning skills which are super important in every walk of life!", "node_slug": "central-inscribed-circumscribed", "render_type": "Tutorial", "topic_page_url": "/math/geometry/cc-geometry-circles/central-inscribed-circumscribed", "extended_slug": "math/geometry/cc-geometry-circles/central-inscribed-circumscribed", "kind": "Topic", "slug": "central-inscribed-circumscribed"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/cc-geometry-circles/equation-of-a-circle/", "id": "equation-of-a-circle", "hide": false, "title": "Equation of a circle", "child_data": [{"kind": "Video", "id": "xf9d6f523"}, {"kind": "Video", "id": "x8de8df82"}, {"kind": "Exercise", "id": "xfe85ab0d"}, {"kind": "Video", "id": "xca06c2ed"}, {"kind": "Exercise", "id": "196139891"}, {"kind": "Video", "id": "x577fb2f2"}, {"kind": "Exercise", "id": "196157133"}], "children": [{"path": "khan/math/geometry/cc-geometry-circles/equation-of-a-circle/equation-for-a-circle-using-the-pythagorean-theorem/", "id": "GQXUpB2NHvQ", "title": "Equation for a circle using the Pythagorean Theorem", "kind": "Video", "slug": "equation-for-a-circle-using-the-pythagorean-theorem"}, {"path": "khan/math/geometry/cc-geometry-circles/equation-of-a-circle/pythagorean-theorem-and-radii-of-circles/", "id": "ogg_ZxSeNQ0", "title": "Pythagorean theorem and radii of circles", "kind": "Video", "slug": "pythagorean-theorem-and-radii-of-circles"}, {"path": "khan/math/geometry/cc-geometry-circles/equation-of-a-circle/pythagorean-theorem-and-the-equation-of-a-circle/", "id": "pythagorean-theorem-and-the-equation-of-a-circle", "title": "Pythagorean theorem and the equation of a circle", "slug": "pythagorean-theorem-and-the-equation-of-a-circle", "kind": "Exercise"}, {"path": "khan/math/geometry/cc-geometry-circles/equation-of-a-circle/radius-and-center-for-a-circle-equation-in-standard-form/", "id": "JvDpYlyKkNU", "title": "Radius and center for a circle equation in standard form", "kind": "Video", "slug": "radius-and-center-for-a-circle-equation-in-standard-form"}, {"path": "khan/math/geometry/cc-geometry-circles/equation-of-a-circle/equation_of_a_circle_1/", "id": "equation_of_a_circle_1", "title": "Equation of a circle in factored form", "description": "Find the center and radius of a circle given the equation in factored form.", "slug": "equation_of_a_circle_1", "kind": "Exercise"}, {"path": "khan/math/geometry/cc-geometry-circles/equation-of-a-circle/completing-the-square-to-write-equation-in-standard-form-of-a-circle/", "id": "XyDMsotfJhE", "title": "Completing the square to write equation in standard form of a circle", "kind": "Video", "slug": "completing-the-square-to-write-equation-in-standard-form-of-a-circle"}, {"path": "khan/math/geometry/cc-geometry-circles/equation-of-a-circle/equation_of_a_circle_2/", "id": "equation_of_a_circle_2", "title": "Equation of a circle in non-factored form", "description": "Find the center and radius of a circle given the equation in unfactored form.", "slug": "equation_of_a_circle_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You know that a circle can be viewed as the set of all points that whose distance from the center is equal to the radius. In this tutorial, we use this information and the Pythagorean Theorem to derive the equation of a circle.", "node_slug": "equation-of-a-circle", "render_type": "Tutorial", "topic_page_url": "/math/geometry/cc-geometry-circles/equation-of-a-circle", "extended_slug": "math/geometry/cc-geometry-circles/equation-of-a-circle", "kind": "Topic", "slug": "equation-of-a-circle"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/cc-geometry-circles/area-inscribed-triangle/", "id": "area-inscribed-triangle", "hide": false, "title": "Area of inscribed triangle", "child_data": [{"kind": "Video", "id": "267245530"}, {"kind": "Video", "id": "298420732"}, {"kind": "Video", "id": "24979"}], "children": [{"path": "khan/math/geometry/cc-geometry-circles/area-inscribed-triangle/sss-to-show-a-radius-is-perpendicular-to-a-chord-that-it-bisects/", "id": "TgDk06Qayxw", "title": "SSS to show a radius is perpendicular to a chord that it bisects", "kind": "Video", "description": "More on the difference between a theorem and axiom. Proving a cool result using SSS", "slug": "sss-to-show-a-radius-is-perpendicular-to-a-chord-that-it-bisects"}, {"path": "khan/math/geometry/cc-geometry-circles/area-inscribed-triangle/perpendicular-radius-bisects-chord/", "id": "q7eF5Ci944U", "title": "Perpendicular radius bisects chord", "kind": "Video", "description": "Simple proof using RSH postulate to show that a radius perpendicular to a chord bisects it", "slug": "perpendicular-radius-bisects-chord"}, {"path": "khan/math/geometry/cc-geometry-circles/area-inscribed-triangle/area-of-inscribed-equilateral-triangle-some-basic-trig-used/", "id": "UmiZK6Hgm6c", "title": "Area of inscribed equilateral triangle (some basic trig used)", "kind": "Video", "description": "Problem that requires us to figure out the area of an equilateral triangle inscribed in a circle (A little trigonometry used)", "slug": "area-of-inscribed-equilateral-triangle-some-basic-trig-used"}], "in_knowledge_map": false, "description": "This more advanced (and very optional) tutorial is fun to look at for enrichment. It builds to figuring out the formula for the area of a triangle inscribed in a circle!", "node_slug": "area-inscribed-triangle", "render_type": "Tutorial", "topic_page_url": "/math/geometry/cc-geometry-circles/area-inscribed-triangle", "extended_slug": "math/geometry/cc-geometry-circles/area-inscribed-triangle", "kind": "Topic", "slug": "area-inscribed-triangle"}], "in_knowledge_map": false, "description": "", "node_slug": "cc-geometry-circles", "render_type": "Topic", "topic_page_url": "/math/geometry/cc-geometry-circles", "extended_slug": "math/geometry/cc-geometry-circles", "kind": "Topic", "slug": "cc-geometry-circles"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/right_triangles_topic/", "id": "right_triangles_topic", "hide": false, "title": "Right triangles and trigonometry", "child_data": [{"kind": "Topic", "id": "x58c57a29"}, {"kind": "Topic", "id": "x04119835"}, {"kind": "Topic", "id": "xa494e4ce"}, {"kind": "Topic", "id": "xc899b57d"}, {"kind": "Topic", "id": "xa2ad7249"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/right_triangles_topic/pyth_theor/", "id": "pyth_theor", "hide": false, "title": "Pythagorean theorem", "child_data": [{"kind": "Video", "id": "23754"}, {"kind": "Video", "id": "2600799"}, {"kind": "Video", "id": "26902"}, {"kind": "Video", "id": "26903"}, {"kind": "Video", "id": "26766"}, {"kind": "Exercise", "id": "3032"}, {"kind": "Exercise", "id": "x24844d0b"}, {"kind": "Separator", "id": "_separator"}, {"kind": "Video", "id": "24961"}, {"kind": "Video", "id": "24963"}], "children": [{"path": "khan/math/geometry/right_triangles_topic/pyth_theor/pythagorean-theorem/", "id": "AEIzy1kNRqo", "title": "Pythagorean theorem", "kind": "Video", "description": "Pythagorean Theorem", "slug": "pythagorean-theorem"}, {"path": "khan/math/geometry/right_triangles_topic/pyth_theor/the-pythagorean-theorem/", "id": "AA6RfgP-AHU", "title": "The Pythagorean theorem intro", "kind": "Video", "description": "Introduction to the Pythagorean Theorem", "slug": "the-pythagorean-theorem"}, {"path": "khan/math/geometry/right_triangles_topic/pyth_theor/pythagorean-theorem-1/", "id": "JVrkLIcA2qw", "title": "Pythagorean theorem 1", "kind": "Video", "description": "Pythagorean Theorem 1", "slug": "pythagorean-theorem-1"}, {"path": "khan/math/geometry/right_triangles_topic/pyth_theor/pythagorean-theorem-2/", "id": "O64YFlX1_aI", "title": "Pythagorean theorem 2", "kind": "Video", "description": "Pythagorean Theorem 2", "slug": "pythagorean-theorem-2"}, {"path": "khan/math/geometry/right_triangles_topic/pyth_theor/pythagorean-theorem-3/", "id": "T0IOrRETWhI", "title": "Pythagorean theorem 3", "kind": "Video", "description": "Pythagorean Theorem 3", "slug": "pythagorean-theorem-3"}, {"path": "khan/math/geometry/right_triangles_topic/pyth_theor/pythagorean_theorem_1/", "id": "pythagorean_theorem_1", "title": "Pythagorean theorem", "description": "Find the leg or hypotenuse of a right triangle using the Pythagorean theorem.", "slug": "pythagorean_theorem_1", "kind": "Exercise"}, {"path": "khan/math/geometry/right_triangles_topic/pyth_theor/pythagorean-theorem-word-problems/", "id": "pythagorean-theorem-word-problems", "title": "Pythagorean theorem word problems", "slug": "pythagorean-theorem-word-problems", "kind": "Exercise"}, {"path": "khan/math/geometry/right_triangles_topic/pyth_theor/introduction-to-the-pythagorean-theorem/", "id": "s9t7rNhaBp8", "title": "Introduction to the Pythagorean theorem", "kind": "Video", "description": "Right triangles and the Pythagorean Theorem", "slug": "introduction-to-the-pythagorean-theorem"}, {"path": "khan/math/geometry/right_triangles_topic/pyth_theor/pythagorean-theorem-ii/", "id": "nMhJLn5ives", "title": "Pythagorean theorem II", "kind": "Video", "description": "More Pythagorean Theorem examples. Introduction to 45-45-90 triangles.", "slug": "pythagorean-theorem-ii"}], "in_knowledge_map": false, "description": "Named after the Greek philosopher who lived nearly 2600 years ago, the Pythagorean theorem is as good as math theorems get (Pythagoras also started a religious movement). It's simple. It's beautiful. It's powerful.\n\nIn this tutorial, we will cover what it is and how it can be used. We have another tutorial that gives you as many proofs of it as you might need.", "node_slug": "pyth_theor", "render_type": "Tutorial", "topic_page_url": "/math/geometry/right_triangles_topic/pyth_theor", "extended_slug": "math/geometry/right_triangles_topic/pyth_theor", "kind": "Topic", "slug": "pyth_theor"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/right_triangles_topic/pythagorean_proofs/", "id": "pythagorean_proofs", "hide": false, "title": "Pythagorean theorem proofs", "child_data": [{"kind": "Video", "id": "1199652424"}, {"kind": "Video", "id": "1199369003"}, {"kind": "Video", "id": "290279020"}, {"kind": "Video", "id": "1199568849"}, {"kind": "Exercise", "id": "xc871e072"}], "children": [{"path": "khan/math/geometry/right_triangles_topic/pythagorean_proofs/garfield-s-proof-of-the-pythagorean-theorem/", "id": "EINpkcphsPQ", "title": "Garfield's proof of the Pythagorean theorem", "kind": "Video", "description": "James Garfield's proof of the Pythagorean Theorem.", "slug": "garfield-s-proof-of-the-pythagorean-theorem"}, {"path": "khan/math/geometry/right_triangles_topic/pythagorean_proofs/bhaskara-s-proof-of-pythagorean-theorem-avi/", "id": "1ul8g55dYA4", "title": "Bhaskara's proof of the Pythagorean theorem", "kind": "Video", "description": "An elegant visual proof of the Pythagorean Theorem developed by the 12th century Indian mathematician Bhaskara.", "slug": "bhaskara-s-proof-of-pythagorean-theorem-avi"}, {"path": "khan/math/geometry/right_triangles_topic/pythagorean_proofs/pythagorean-theorem-proof-using-similarity/", "id": "LrS5_l-gk94", "title": "Pythagorean theorem proof using similarity", "kind": "Video", "description": "Proof of the Pythagorean Theorem using similarity", "slug": "pythagorean-theorem-proof-using-similarity"}, {"path": "khan/math/geometry/right_triangles_topic/pythagorean_proofs/another-pythagorean-theorem-proof/", "id": "rcBaqkGp7CA", "title": "Another Pythagorean theorem proof", "kind": "Video", "description": "Visually proving the Pythagorean Theorem", "slug": "another-pythagorean-theorem-proof"}, {"path": "khan/math/geometry/right_triangles_topic/pythagorean_proofs/pythagorean-theorem-proofs/", "id": "pythagorean-theorem-proofs", "title": "Pythagorean Theorem proofs", "description": "Explain a proof of the Pythagorean Theorem and its converse.", "slug": "pythagorean-theorem-proofs", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The Pythagorean theorem is one of the most famous ideas in all of mathematics. This tutorial proves it. Then proves it again... and again... and again. More than just satisfying any skepticism of whether the Pythagorean theorem is really true (only one proof would be sufficient for that), it will hopefully open your mind to new and beautiful ways to prove something very powerful.", "node_slug": "pythagorean_proofs", "render_type": "Tutorial", "topic_page_url": "/math/geometry/right_triangles_topic/pythagorean_proofs", "extended_slug": "math/geometry/right_triangles_topic/pythagorean_proofs", "kind": "Topic", "slug": "pythagorean_proofs"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/right_triangles_topic/special_right_triangles/", "id": "special_right_triangles", "hide": false, "title": "Special right triangles", "child_data": [{"kind": "Video", "id": "292160871"}, {"kind": "Video", "id": "292160870"}, {"kind": "Video", "id": "294677485"}, {"kind": "Exercise", "id": "3034"}, {"kind": "Video", "id": "353965911"}, {"kind": "Separator", "id": "_separator"}, {"kind": "Video", "id": "24965"}, {"kind": "Video", "id": "24967"}], "children": [{"path": "khan/math/geometry/right_triangles_topic/special_right_triangles/30-60-90-triangle-side-ratios-proof/", "id": "SFL4stapeUs", "title": "30-60-90 triangle side ratios proof", "kind": "Video", "description": "Proving the ratios between the sides of a 30-60-90 triangle", "slug": "30-60-90-triangle-side-ratios-proof"}, {"path": "khan/math/geometry/right_triangles_topic/special_right_triangles/45-45-90-triangle-side-ratios/", "id": "McINBOFCGH8", "title": "45-45-90 triangle side ratios", "kind": "Video", "description": "Showing the ratios of the sides of a 45-45-90 triangle are 1:1:sqrt(2)", "slug": "45-45-90-triangle-side-ratios"}, {"path": "khan/math/geometry/right_triangles_topic/special_right_triangles/30-60-90-triangle-example-problem/", "id": "dgHksfBFbjk", "title": "30-60-90 triangle example problem", "kind": "Video", "description": "Using what we know about 30-60-90 triangles to solve what at first seems to be a challenging problem", "slug": "30-60-90-triangle-example-problem"}, {"path": "khan/math/geometry/right_triangles_topic/special_right_triangles/pythagorean_theorem_2/", "id": "pythagorean_theorem_2", "title": "Special right triangles", "slug": "pythagorean_theorem_2", "kind": "Exercise"}, {"path": "khan/math/geometry/right_triangles_topic/special_right_triangles/area-of-a-regular-hexagon/", "id": "LrxZMdQ6tiw", "title": "Area of a regular hexagon", "kind": "Video", "description": "Using what we know about triangles to find the area of a regular hexagon", "slug": "area-of-a-regular-hexagon"}, {"path": "khan/math/geometry/right_triangles_topic/special_right_triangles/45-45-90-triangles/", "id": "tSHitjFIjd8", "title": "45-45-90 triangles", "kind": "Video", "description": "Introduction to 45-45-90 Triangles", "slug": "45-45-90-triangles"}, {"path": "khan/math/geometry/right_triangles_topic/special_right_triangles/intro-to-30-60-90-triangles/", "id": "Qwet4cIpnCM", "title": "Intro to 30-60-90 triangles", "kind": "Video", "description": "A few more 45-45-90 examples and an introduction to 30-60-90 triangles.", "slug": "intro-to-30-60-90-triangles"}], "in_knowledge_map": false, "description": "We hate to pick favorites, but there really are certain right triangles that are more special than others. In this tutorial, we pick them out, show why they're special, and prove it! These include 30-60-90 and 45-45-90 triangles (the numbers refer to the measure of the angles in the triangle).", "node_slug": "special_right_triangles", "render_type": "Tutorial", "topic_page_url": "/math/geometry/right_triangles_topic/special_right_triangles", "extended_slug": "math/geometry/right_triangles_topic/special_right_triangles", "kind": "Topic", "slug": "special_right_triangles"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/", "id": "cc-geometry-trig", "hide": false, "title": "Sine, cosine and tangent trigonometric functions", "child_data": [{"kind": "Video", "id": "19647490"}, {"kind": "Video", "id": "1153704166"}, {"kind": "Exercise", "id": "592471461"}, {"kind": "Video", "id": "19647491"}, {"kind": "Exercise", "id": "3036"}, {"kind": "Exercise", "id": "592442008"}, {"kind": "Video", "id": "1153614407"}, {"kind": "Exercise", "id": "2032"}, {"kind": "Video", "id": "x9a39e2a2"}, {"kind": "Video", "id": "xf177c90b"}, {"kind": "Exercise", "id": "xf3c439ef"}], "children": [{"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/basic-trigonometry/", "id": "Jsiy4TxgIME", "title": "The basics of trigonometry", "kind": "Video", "description": "What is trigonometry? Get the answer here.", "slug": "basic-trigonometry"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/example-using-soh-cah-toa/", "id": "I3jyBUyjg48", "title": "Example: Using soh cah toa", "kind": "Video", "description": "Worked example evaluating sine and cosine using soh cah toa definition.", "slug": "example-using-soh-cah-toa"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/trigonometry_05/", "id": "trigonometry_0.5", "title": "Trigonometry 0.5", "slug": "trigonometry_05", "kind": "Exercise"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/basic-trigonometry-ii/", "id": "G-T_6hCdMQc", "title": "Basic trigonometry II", "kind": "Video", "description": "A few more examples using SOH CAH TOA", "slug": "basic-trigonometry-ii"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/trigonometry_1/", "id": "trigonometry_1", "title": "Trigonometry 1", "slug": "trigonometry_1", "kind": "Exercise"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/trigonometry_15/", "id": "trigonometry_1.5", "title": "Trigonometry 1.5", "slug": "trigonometry_15", "kind": "Exercise"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/example-trig-to-solve-the-sides-and-angles-of-a-right-triangle/", "id": "l5VbdqRjTXc", "title": "Example: Trig to solve the sides and angles of a right triangle", "kind": "Video", "description": "Worked example using trigonometry to solve for the lengths of the sides of a right triangle given one of the non-right angles.", "slug": "example-trig-to-solve-the-sides-and-angles-of-a-right-triangle"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/trigonometry_2/", "id": "trigonometry_2", "title": "Trigonometry 2", "slug": "trigonometry_2", "kind": "Exercise"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/angle-to-aim-to-get-alien/", "id": "aHzd-u35LuA", "title": "Angle to aim to get alien", "kind": "Video", "slug": "angle-to-aim-to-get-alien"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/how-much-of-a-pyramid-is-submerged/", "id": "Z5EnuVJawmY", "title": "How much of a pyramid is submerged", "kind": "Video", "slug": "how-much-of-a-pyramid-is-submerged"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig/applying-right-triangles/", "id": "applying-right-triangles", "title": "Applying right triangles", "slug": "applying-right-triangles", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, you will learn all the trigonometry that you are likely to remember in ten years (assuming you are a lazy non-curious, non-lifelong learner). But even in that non-ideal world where you forgot everything else, you'll be able to do more than you might expect with the concentrated knowledge you are about to get.", "node_slug": "cc-geometry-trig", "render_type": "Tutorial", "topic_page_url": "/math/geometry/right_triangles_topic/cc-geometry-trig", "extended_slug": "math/geometry/right_triangles_topic/cc-geometry-trig", "kind": "Topic", "slug": "cc-geometry-trig"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig-similarity/", "id": "cc-geometry-trig-similarity", "hide": false, "title": "Trig ratios and similarity", "child_data": [{"kind": "Video", "id": "xc0627a6a"}, {"kind": "Video", "id": "xee258334"}, {"kind": "Video", "id": "x71f71130"}, {"kind": "Video", "id": "x835650f9"}, {"kind": "Video", "id": "x98eb8563"}, {"kind": "Exercise", "id": "x42befb70"}], "children": [{"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig-similarity/similarity-to-define-sine-cosine-and-tangent/", "id": "QuZMXVJNLCo", "title": "Similarity to define sine, cosine, and tangent", "kind": "Video", "slug": "similarity-to-define-sine-cosine-and-tangent"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig-similarity/sine-and-cosine-of-complements-example/", "id": "yiH6GoscimY", "title": "Sine and cosine of complements example", "kind": "Video", "slug": "sine-and-cosine-of-complements-example"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig-similarity/showing-relationship-between-cosine-and-sine-of-complements/", "id": "BLQNL_UGONg", "title": "Showing relationship between cosine and sine of complements", "kind": "Video", "slug": "showing-relationship-between-cosine-and-sine-of-complements"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig-similarity/example-with-trig-functions-and-ratios/", "id": "TugWqiUjOU4", "title": "Example with trig functions and ratios", "kind": "Video", "slug": "example-with-trig-functions-and-ratios"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig-similarity/example-relating-trig-function-to-side-ratios/", "id": "EBKNtjZAjXg", "title": "Example relating trig function to side ratios", "kind": "Video", "slug": "example-relating-trig-function-to-side-ratios"}, {"path": "khan/math/geometry/right_triangles_topic/cc-geometry-trig-similarity/trigonometric-functions-and-side-ratios-in-right-triangles/", "id": "trigonometric-functions-and-side-ratios-in-right-triangles", "title": "Trigonometric functions and side ratios in right triangles", "slug": "trigonometric-functions-and-side-ratios-in-right-triangles", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we will build on our understanding of similarity to get a deeper appreciation for the motivation behind trigonometric ratios and relationships.", "node_slug": "cc-geometry-trig-similarity", "render_type": "Tutorial", "topic_page_url": "/math/geometry/right_triangles_topic/cc-geometry-trig-similarity", "extended_slug": "math/geometry/right_triangles_topic/cc-geometry-trig-similarity", "kind": "Topic", "slug": "cc-geometry-trig-similarity"}], "in_knowledge_map": false, "description": "Triangles are not always right (although they are never wrong), but when they are it opens up an exciting world of possibilities. Not only are right triangles cool in their own right (pun intended), they are the basis of very important ideas in analytic geometry (the distance between two points in space) and trigonometry.", "node_slug": "right_triangles_topic", "render_type": "Topic", "topic_page_url": "/math/geometry/right_triangles_topic", "extended_slug": "math/geometry/right_triangles_topic", "kind": "Topic", "slug": "right_triangles_topic"}, {"icon_src": "/images/power-mode/badges/basic-geometry-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/basic-geometry/", "id": "basic-geometry", "hide": false, "title": "Perimeter, area, and volume", "child_data": [{"kind": "Topic", "id": "x6d532096"}, {"kind": "Topic", "id": "x45ea0ae3"}, {"kind": "Topic", "id": "x3e8b1476"}, {"kind": "Topic", "id": "xaea89b2c"}, {"kind": "Topic", "id": "x9c7e637c"}, {"kind": "Topic", "id": "x8fc0f183"}, {"kind": "Topic", "id": "x80bb3b66"}, {"kind": "Topic", "id": "xd271d394"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/", "id": "perimeter_area_tutorial", "hide": false, "title": "Perimeter and area of triangles", "child_data": [{"kind": "Video", "id": "283213901"}, {"kind": "Video", "id": "283213902"}, {"kind": "Exercise", "id": "920312137"}, {"kind": "Exercise", "id": "x5df942ac"}, {"kind": "Video", "id": "283213903"}, {"kind": "Video", "id": "2600582"}, {"kind": "Video", "id": "294658865"}, {"kind": "Video", "id": "xd65354b0"}, {"kind": "Exercise", "id": "898809023"}, {"kind": "Video", "id": "283213900"}], "children": [{"path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/perimeter-and-area-basics/", "id": "LoaBd-sPzkU", "title": "Perimeter and area: the basics", "kind": "Video", "description": "Great geometry primer on perimeter and area. Listen carefully. Sal explains the concepts so you'll understand them.", "slug": "perimeter-and-area-basics"}, {"path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/triangle-area-proofs/", "id": "YOYQys52sPs", "title": "Triangle area proofs", "kind": "Video", "description": "Proving that the area of any triangle is 1/2 b x h", "slug": "triangle-area-proofs"}, {"path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/area_of_triangles_1/", "id": "area_of_triangles_1", "title": "Area of triangles", "description": "Practice finding the area of right, acute, and obtuse triangles from a diagram.", "slug": "area_of_triangles_1", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/area-of-triangles-2/", "id": "area-of-triangles-2", "title": "Areas of shapes on grids", "description": "Practice finding the areas of triangles and quadrilaterals on grids.", "slug": "area-of-triangles-2", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/interesting-perimeter-and-area-problems/", "id": "vWXMDIazHjA", "title": "Interesting perimeter and area problems", "kind": "Video", "description": "Three example problems involving perimeter and area", "slug": "interesting-perimeter-and-area-problems"}, {"path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/area-of-diagonal-generated-triangles-of-rectangle-are-equal/", "id": "YTRimTJ5nX4", "title": "Area of diagonal generated triangles of rectangle are equal", "kind": "Video", "description": "Area of Diagonal Generated Triangles of Rectangle are Equal", "slug": "area-of-diagonal-generated-triangles-of-rectangle-are-equal"}, {"path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/area-of-an-equilateral-triangle/", "id": "UKQ65tiIQ6o", "title": "Area of an equilateral triangle", "kind": "Video", "description": "Finding the formula for the area of an equilateral triangle with side s", "slug": "area-of-an-equilateral-triangle"}, {"path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/area-of-shaded-region-made-from-equilateral-triangles/", "id": "QVxqgxVtKbs", "title": "Area of shaded region made from equilateral triangles", "kind": "Video", "slug": "area-of-shaded-region-made-from-equilateral-triangles"}, {"path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/shaded_areas/", "id": "shaded_areas", "title": "Shaded areas", "description": "Find the areas of shaded regions which are combinations of squares, triangles, and circles.", "slug": "shaded_areas", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/perimeter_area_tutorial/challenging-perimeter-problem/", "id": "1uWZNW5PF-s", "title": "Challenging perimeter problem", "kind": "Video", "description": "Perimeter of rectangle covered by 9 non-overlapping squares. From 2000 American Invitational Math Exam", "slug": "challenging-perimeter-problem"}], "in_knowledge_map": false, "description": "You first learned about perimeter and area when you were in grade school. In this tutorial, we will revisit those ideas with a more mathy lens. We will use our prior knowledge of congruence to really start to prove some neat (and useful) results (including some that will be useful in our study of similarity).", "node_slug": "perimeter_area_tutorial", "render_type": "Tutorial", "topic_page_url": "/math/geometry/basic-geometry/perimeter_area_tutorial", "extended_slug": "math/geometry/basic-geometry/perimeter_area_tutorial", "kind": "Topic", "slug": "perimeter_area_tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/basic-geometry/triangle_inequality_theorem/", "id": "triangle_inequality_theorem", "hide": false, "title": "Triangle inequality theorem", "child_data": [{"kind": "Video", "id": "1242820000"}, {"kind": "Exercise", "id": "251649050"}], "children": [{"path": "khan/math/geometry/basic-geometry/triangle_inequality_theorem/triangle-inqequality-theorem/", "id": "KlKYvbigBqs", "title": "Triangle inequality theorem", "kind": "Video", "description": "Intuition behind the triangle inequality theorem", "slug": "triangle-inqequality-theorem"}, {"path": "khan/math/geometry/basic-geometry/triangle_inequality_theorem/triangle_inequality_theorem/", "id": "triangle_inequality_theorem", "title": "Triangle inequality theorem", "description": "Given the lengths of two sides of a triangle, what can we say about the third side?", "slug": "triangle_inequality_theorem", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The triangle inequality theorem is, on some level, kind of simple. But, as you'll see as you go into high level mathematics, it is often used in fancy proofs.\n\nThis tutorial introduces you to what it is and gives you some practice understanding the constraints on the dimensions of a triangle.", "node_slug": "triangle_inequality_theorem", "render_type": "Tutorial", "topic_page_url": "/math/geometry/basic-geometry/triangle_inequality_theorem", "extended_slug": "math/geometry/basic-geometry/triangle_inequality_theorem", "kind": "Topic", "slug": "triangle_inequality_theorem"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/basic-geometry/koch_snowflake/", "id": "koch_snowflake", "hide": false, "title": "Koch snowflake fractal", "child_data": [{"kind": "Video", "id": "283213904"}, {"kind": "Video", "id": "294658865"}, {"kind": "Video", "id": "294677477"}, {"kind": "Video", "id": "294676175"}], "children": [{"path": "khan/math/geometry/basic-geometry/koch_snowflake/koch-snowflake-fractal/", "id": "azBNsPa1WC4", "title": "Koch snowflake fractal", "kind": "Video", "description": "A shape that has an infinite perimeter but finite area", "slug": "koch-snowflake-fractal"}, {"path": "khan/math/geometry/basic-geometry/koch_snowflake/area-of-an-equilateral-triangle/", "id": "UKQ65tiIQ6o", "title": "Area of an equilateral triangle", "kind": "Video", "description": "Finding the formula for the area of an equilateral triangle with side s", "slug": "area-of-an-equilateral-triangle"}, {"path": "khan/math/geometry/basic-geometry/koch_snowflake/area-of-koch-snowflake-part-1-advanced/", "id": "64bH_27Ehoc", "title": "Area of Koch snowflake (part 1) - advanced", "kind": "Video", "description": "Starting to figure out the area of a Koch Snowflake (which has an infinite perimeter)", "slug": "area-of-koch-snowflake-part-1-advanced"}, {"path": "khan/math/geometry/basic-geometry/koch_snowflake/area-of-koch-snowflake-part-2-advanced/", "id": "vBlR2xNAGmo", "title": "Area of Koch snowflake (part 2) - advanced", "kind": "Video", "description": "Summing an infinite geometric series to finally find the finite area of a Koch Snowflake", "slug": "area-of-koch-snowflake-part-2-advanced"}], "in_knowledge_map": false, "description": "Named after Helge von Koch, the Koch snowflake is one of the first fractals to be discovered. It is created by adding smaller and smaller equilateral bumps to an existing equilateral triangle. Quite amazingly, it produces a figure of infinite perimeter and finite area!", "node_slug": "koch_snowflake", "render_type": "Tutorial", "topic_page_url": "/math/geometry/basic-geometry/koch_snowflake", "extended_slug": "math/geometry/basic-geometry/koch_snowflake", "kind": "Topic", "slug": "koch_snowflake"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/geometry/basic-geometry/heron_formula_tutorial/", "id": "heron_formula_tutorial", "hide": false, "title": "Heron's formula", "child_data": [{"kind": "Video", "id": "24971"}, {"kind": "Video", "id": "24973"}, {"kind": "Video", "id": "24975"}], "children": [{"path": "khan/math/geometry/basic-geometry/heron_formula_tutorial/heron-s-formula/", "id": "-YI6UC4qVEY", "title": "Heron's formula", "kind": "Video", "description": "Using Heron's Formula to determine the area of a triangle while only knowing the lengths of the sides", "slug": "heron-s-formula"}, {"path": "khan/math/geometry/basic-geometry/heron_formula_tutorial/part-1-of-proof-of-heron-s-formula/", "id": "AreOMvPCxv8", "title": "Part 1 of proof of Heron's formula", "kind": "Video", "description": "Part 1 of the proof of Heron's Formula", "slug": "part-1-of-proof-of-heron-s-formula"}, {"path": "khan/math/geometry/basic-geometry/heron_formula_tutorial/part-2-of-the-proof-of-heron-s-formula/", "id": "nZu7IZLhJRI", "title": "Part 2 of proof of Heron's formula", "kind": "Video", "description": "Showing that the expression in part 1 is identical to Heron's Formula", "slug": "part-2-of-the-proof-of-heron-s-formula"}], "in_knowledge_map": false, "description": "Named after Heron of Alexandria, Heron's formula is a power (but often overlooked) method for finding the area of ANY triangle. In this tutorial we will explain how to use it and then prove it!", "node_slug": "heron_formula_tutorial", "render_type": "Tutorial", "topic_page_url": "/math/geometry/basic-geometry/heron_formula_tutorial", "extended_slug": "math/geometry/basic-geometry/heron_formula_tutorial", "kind": "Topic", "slug": "heron_formula_tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/basic-geometry/circum_area_circles/", "id": "circum_area_circles", "hide": false, "title": "Circumference and area of circles", "child_data": [{"kind": "Video", "id": "24957"}, {"kind": "Video", "id": "370305280"}, {"kind": "Exercise", "id": "720782619"}, {"kind": "Video", "id": "370305273"}, {"kind": "Exercise", "id": "720935156"}], "children": [{"path": "khan/math/geometry/basic-geometry/circum_area_circles/circles-radius-diameter-and-circumference/", "id": "jyLRpr2P0MQ", "title": "Circles: radius, diameter, circumference and Pi", "kind": "Video", "description": "Learn how the number Pi allows us to relate the radius, diameter, and circumference of a circle.", "slug": "circles-radius-diameter-and-circumference"}, {"path": "khan/math/geometry/basic-geometry/circum_area_circles/parts-of-a-circle/", "id": "04N79tItPEA", "title": "Labeling parts of a circle", "kind": "Video", "description": "Radius, diameter, center, and circumference--all are parts of a circle. Let's go through each and understand how they are defined.", "slug": "parts-of-a-circle"}, {"path": "khan/math/geometry/basic-geometry/circum_area_circles/radius_diameter_and_circumference/", "id": "radius_diameter_and_circumference", "title": "Radius, diameter, and circumference", "description": "Practice labeling the parts of a circle: radius, diameter, and circumference.", "slug": "radius_diameter_and_circumference", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/circum_area_circles/area-of-a-circle/", "id": "ZyOhRgnFmIY", "title": "Area of a circle", "kind": "Video", "description": "In this example, we solve for the area of a circle when given the diameter. If you recall, the diameter is the length of a line that runs across the circle and through the center.", "slug": "area-of-a-circle"}, {"path": "khan/math/geometry/basic-geometry/circum_area_circles/area_of_a_circle/", "id": "area_of_a_circle", "title": "Area of a circle", "slug": "area_of_a_circle", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Circles are everywhere. How can we measure how big they are? Well, we could think about the distance around the circle (circumference). Another option would be to think about how much space it takes up on our paper (area). Have fun!", "node_slug": "circum_area_circles", "render_type": "Tutorial", "topic_page_url": "/math/geometry/basic-geometry/circum_area_circles", "extended_slug": "math/geometry/basic-geometry/circum_area_circles", "kind": "Topic", "slug": "circum_area_circles"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/basic-geometry/area_non_standard/", "id": "area_non_standard", "hide": false, "title": "Perimeter and area of non-standard shapes", "child_data": [{"kind": "Video", "id": "339557900"}, {"kind": "Video", "id": "370305272"}, {"kind": "Video", "id": "351468823"}, {"kind": "Exercise", "id": "898971113"}, {"kind": "Video", "id": "x9eb86ee6"}, {"kind": "Video", "id": "xae34441c"}, {"kind": "Exercise", "id": "899013436"}, {"kind": "Video", "id": "372448788"}, {"kind": "Video", "id": "372432668"}, {"kind": "Exercise", "id": "xfb0c1229"}], "children": [{"path": "khan/math/geometry/basic-geometry/area_non_standard/quadrilateral-overview/", "id": "Ka82QC4QvGA", "title": "Quadrilateral overview", "kind": "Video", "description": "\"Quad\" means \"four\" and \"lateral\" means \"line.\" A quadrilateral is literally a shape with four sides (lines) and four angles. Let's learn the difference between concave and convex quadrilaterals as well as trapezoids, parallelograms, and rhombi.", "slug": "quadrilateral-overview"}, {"path": "khan/math/geometry/basic-geometry/area_non_standard/quadrilateral-properties/", "id": "5CeBlu260Rw", "title": "Quadrilateral properties", "kind": "Video", "description": "How about this: we are given a 4-sided shape and asked to determine whether its properties qualify it to be called a quadrilateral (or category of quadrilaterals). Check it out.", "slug": "quadrilateral-properties"}, {"path": "khan/math/geometry/basic-geometry/area_non_standard/area-of-a-parallelogram/", "id": "tFhBAeZVTMw", "title": "Area of a parallelogram", "kind": "Video", "description": "Guess what's interesting about the opposite sides of a parallelogram? That's right....they are parallel! Let's find the area--base times height", "slug": "area-of-a-parallelogram"}, {"path": "khan/math/geometry/basic-geometry/area_non_standard/area_of_parallelograms/", "id": "area_of_parallelograms", "title": "Area of parallelograms", "description": "Practice finding the area of parallelograms given base and height.", "slug": "area_of_parallelograms", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/area_non_standard/area-of-a-trapezoid-1/", "id": "j3-XYLnxJDY", "title": "Area of a trapezoid", "kind": "Video", "description": "A trapezoid is a cousin of the parallelogram. However, in trapezoid only two of the opposing sides are parallel to each other. Here's we explain how to find its area.", "slug": "area-of-a-trapezoid-1"}, {"path": "khan/math/geometry/basic-geometry/area_non_standard/area-of-a-kite/", "id": "b8q6i_XPyhk", "title": "Area of a kite", "kind": "Video", "description": "Learn how to find the area of a kite. A kite is a type of quadrilateral that is symmetric around one of its diagonals.", "slug": "area-of-a-kite"}, {"path": "khan/math/geometry/basic-geometry/area_non_standard/areas_of_trapezoids_rhombi_and_kites/", "id": "areas_of_trapezoids_rhombi_and_kites", "title": "Area of trapezoids", "description": "Practice finding the areas of trapezoids.", "slug": "areas_of_trapezoids_rhombi_and_kites", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/area_non_standard/perimeter-of-a-polygon/", "id": "5ZCKr4wTQvI", "title": "Perimeter of a parallelogram", "kind": "Video", "slug": "perimeter-of-a-polygon"}, {"path": "khan/math/geometry/basic-geometry/area_non_standard/perimeter-and-area-of-a-non-standard-polygon/", "id": "7S1MLJOG-5A", "title": "Perimeter and area of a non-standard polygon", "kind": "Video", "description": "Perimeter and Area of a Non-Standard Polygon", "slug": "perimeter-and-area-of-a-non-standard-polygon"}, {"path": "khan/math/geometry/basic-geometry/area_non_standard/area-of-quadrilaterals-and-polygons/", "id": "area-of-quadrilaterals-and-polygons", "title": "Area of composite figures", "description": "Practice finding the areas of complex shapes that are composed of smaller shapes.", "slug": "area-of-quadrilaterals-and-polygons", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Not everything in the world is a rectangle, circle or triangle. In this tutorial, we give you practice at finding the perimeters and areas of these less-than-standard shapes!", "node_slug": "area_non_standard", "render_type": "Tutorial", "topic_page_url": "/math/geometry/basic-geometry/area_non_standard", "extended_slug": "math/geometry/basic-geometry/area_non_standard", "kind": "Topic", "slug": "area_non_standard"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/basic-geometry/volume_tutorial/", "id": "volume_tutorial", "hide": false, "title": "Volume and surface area", "child_data": [{"kind": "Video", "id": "x6e267a36"}, {"kind": "Exercise", "id": "xe57344e5"}, {"kind": "Video", "id": "xbb4d5fe8"}, {"kind": "Exercise", "id": "x888ea118"}, {"kind": "Exercise", "id": "xa493d7fe"}, {"kind": "Video", "id": "60129394"}, {"kind": "Video", "id": "60129395"}, {"kind": "Exercise", "id": "47840766"}, {"kind": "Video", "id": "xa13c840d"}, {"kind": "Exercise", "id": "xd6334ca4"}, {"kind": "Video", "id": "x8cc61186"}, {"kind": "Video", "id": "372432663"}, {"kind": "Exercise", "id": "x0a326293"}], "children": [{"path": "khan/math/geometry/basic-geometry/volume_tutorial/nets-of-polyhedra/", "id": "ZACf9EecFrY", "title": "Nets of polyhedra", "kind": "Video", "description": "Admittedly, \"nets of polyhedra\" sounds like the title of a bad sci-fi movie about man-eating, muti-headed fish. But in reality, nets of polyhedra are just 2D objects that wrap around 3D objects, like wrapping paper around presents.", "slug": "nets-of-polyhedra"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/nets-of-3d-figures/", "id": "nets-of-3d-figures", "title": "Nets of 3D figures", "description": "Practice matching 2D nets to the 3D shapes the fold up into.", "slug": "nets-of-3d-figures", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/surface-area-from-net/", "id": "m1ZTnl4CNQg", "title": "Finding surface area: nets of polyhedra", "kind": "Video", "description": "Sal solves a problem about whether or not a certain net could be folded up into a certain rectangular prism.", "slug": "surface-area-from-net"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/surface-area/", "id": "surface-area", "title": "Surface area using nets", "description": "Practice using the net of a 3D figure to find surface area.", "slug": "surface-area", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/surface-areas/", "id": "surface-areas", "title": "Surface area", "description": "Practice finding the surface area of 3D objects.", "slug": "surface-areas", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/solid-geometry-volume/", "id": "ZqzAOZ9pP9Q", "title": "Find the volume of a triangular prism and cube", "kind": "Video", "description": "In this tutorial we'll practice finding solid geometry volume. Keep paper and pencil nearby in case you want to remember the formulas.", "slug": "solid-geometry-volume"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/cylinder-volume-and-surface-area/", "id": "gL3HxBQyeg0", "title": "Cylinder volume and surface area", "kind": "Video", "description": "Finding the volume and surface area of a cylinder", "slug": "cylinder-volume-and-surface-area"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/solid_geometry/", "id": "solid_geometry", "title": "Solid geometry", "slug": "solid_geometry", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/density-example-blimp/", "id": "YbNVUhW-HJM", "title": "How many people can a blimp carry", "kind": "Video", "slug": "density-example-blimp"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/surface-and-volume-density-word-problems/", "id": "surface-and-volume-density-word-problems", "title": "Surface and volume density word problems", "slug": "surface-and-volume-density-word-problems", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/volume-cone-example/", "id": "hC6zx9WAiC4", "title": "Volume of a cone", "kind": "Video", "slug": "volume-cone-example"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/volume-of-a-sphere/", "id": "IelS2vg7JO8", "title": "Volume of a sphere", "kind": "Video", "description": "Volume of a Sphere", "slug": "volume-of-a-sphere"}, {"path": "khan/math/geometry/basic-geometry/volume_tutorial/volume-word-problems-with-cones-cylinders-and-spheres/", "id": "volume-word-problems-with-cones--cylinders--and-spheres", "title": "Volume word problems with cones, cylinders, and spheres", "slug": "volume-word-problems-with-cones-cylinders-and-spheres", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Tired of perimeter and area and now want to measure 3-D space-take-upness. Well you've found the right tutorial. Enjoy!", "node_slug": "volume_tutorial", "render_type": "Tutorial", "topic_page_url": "/math/geometry/basic-geometry/volume_tutorial", "extended_slug": "math/geometry/basic-geometry/volume_tutorial", "kind": "Topic", "slug": "volume_tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/basic-geometry/cross-sections/", "id": "cross-sections", "hide": false, "title": "Cross sections of 3D objects", "child_data": [{"kind": "Video", "id": "x938fa80f"}, {"kind": "Exercise", "id": "x744a1e17"}, {"kind": "Video", "id": "x73ceab49"}, {"kind": "Exercise", "id": "x17bfddf4"}, {"kind": "Video", "id": "x0c885529"}, {"kind": "Exercise", "id": "xa709715a"}], "children": [{"path": "khan/math/geometry/basic-geometry/cross-sections/vertical-slice-of-rectangular-pyramid/", "id": "hoa1RBk4dTo", "title": "Slice a rectangular pyramid", "kind": "Video", "description": "What happens when you slice vertically into a rectangular pyramid? What kind of geometric shape results?", "slug": "vertical-slice-of-rectangular-pyramid"}, {"path": "khan/math/geometry/basic-geometry/cross-sections/slicing-3d-figures/", "id": "slicing-3d-figures", "title": "Slicing 3D figures", "slug": "slicing-3d-figures", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/cross-sections/ways-to-cut-a-cube/", "id": "aSokFEpoJFM", "title": "Ways to cut a cube", "kind": "Video", "slug": "ways-to-cut-a-cube"}, {"path": "khan/math/geometry/basic-geometry/cross-sections/cross-sections-of-3d-shapes/", "id": "cross-sections-of-3d-shapes", "title": "Cross sections of 3D objects", "slug": "cross-sections-of-3d-shapes", "kind": "Exercise"}, {"path": "khan/math/geometry/basic-geometry/cross-sections/rotating-2d-shapes-in-3d/", "id": "vdpyWeiHXmU", "title": "Rotating 2D shapes in 3D", "kind": "Video", "slug": "rotating-2d-shapes-in-3d"}, {"path": "khan/math/geometry/basic-geometry/cross-sections/rotate-2d-shapes-to-make-3d-objects/", "id": "rotate-2d-shapes-to-make-3d-objects", "title": "Rotate 2D shapes to make 3D objects", "description": "Practice your 3D visualization skills by rotating 2D shapes.", "slug": "rotate-2d-shapes-to-make-3d-objects", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "cross-sections", "render_type": "Tutorial", "topic_page_url": "/math/geometry/basic-geometry/cross-sections", "extended_slug": "math/geometry/basic-geometry/cross-sections", "kind": "Topic", "slug": "cross-sections"}], "in_knowledge_map": true, "description": "A broad set of tutorials covering perimeter area and volume with and without algebra.", "node_slug": "basic-geometry", "render_type": "Topic", "topic_page_url": "/math/geometry/basic-geometry", "extended_slug": "math/geometry/basic-geometry", "kind": "Topic", "slug": "basic-geometry"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/analytic-geometry-topic/", "id": "analytic-geometry-topic", "hide": false, "title": "Analytic geometry", "child_data": [{"kind": "Topic", "id": "x3ec29bd9"}, {"kind": "Topic", "id": "x85fd66aa"}, {"kind": "Topic", "id": "x14e2d49a"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/", "id": "geometry-problems-coordinate-pla", "hide": false, "title": "Geometry problems on the coordinate plane", "child_data": [{"kind": "Video", "id": "x93881235"}, {"kind": "Video", "id": "x4f7e87ad"}, {"kind": "Video", "id": "xc3e3915f"}, {"kind": "Exercise", "id": "xc0060b75"}, {"kind": "Video", "id": "x63e2adb6"}, {"kind": "Exercise", "id": "xf88e76bd"}], "children": [{"path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/recognizing-points-on-a-circle/", "id": "9ASWQi14FlE", "title": "Recognizing points on a circle", "kind": "Video", "slug": "recognizing-points-on-a-circle"}, {"path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/classfying-a-quadrilateral-on-the-coordinate-plane/", "id": "vsgrWDLEzcQ", "title": "Classifying a quadrilateral on the coordinate plane", "kind": "Video", "slug": "classfying-a-quadrilateral-on-the-coordinate-plane"}, {"path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/identifying-similar-triangles-in-the-coordinate-plane/", "id": "e6sh8AXz41E", "title": "Identifying similar triangles in the coordinate plane", "kind": "Video", "slug": "identifying-similar-triangles-in-the-coordinate-plane"}, {"path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/geometry-problems-on-the-coordinate-plane/", "id": "geometry-problems-on-the-coordinate-plane", "title": "Geometry problems on the coordinate plane", "slug": "geometry-problems-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/minions-within-reach-of-wizard/", "id": "gS6s3MGZlRc", "title": "Which minions can the wizard reach", "kind": "Video", "slug": "minions-within-reach-of-wizard"}, {"path": "khan/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla/coordinate-plane-word-problems-with-polygons/", "id": "coordinate-plane-word-problems-with-polygons", "title": "Coordinate plane word problems with polygons", "slug": "coordinate-plane-word-problems-with-polygons", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You are familiar with the ideas of slope and distance on the coordinate plane. You also feel comfortable with congruence an similarity and many of the other core ideas in Euclidean geometry. In this, tutorial, Descartes and Euclid are forced to work together as we tackle geometry problems on the coordinate plane!", "node_slug": "geometry-problems-coordinate-pla", "render_type": "Tutorial", "topic_page_url": "/math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla", "extended_slug": "math/geometry/analytic-geometry-topic/geometry-problems-coordinate-pla", "kind": "Topic", "slug": "geometry-problems-coordinate-pla"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/analytic-geometry-topic/cc-distances-between-points/", "id": "cc-distances-between-points", "hide": false, "title": "Distances between points", "child_data": [{"kind": "Video", "id": "23756"}, {"kind": "Exercise", "id": "4514693"}, {"kind": "Video", "id": "23758"}, {"kind": "Exercise", "id": "13090861"}, {"kind": "Video", "id": "xbc774557"}, {"kind": "Video", "id": "x967aacb2"}, {"kind": "Exercise", "id": "xc9bcc09d"}], "children": [{"path": "khan/math/geometry/analytic-geometry-topic/cc-distances-between-points/distance-formula/", "id": "nyZuite17Pc", "title": "Distance formula", "kind": "Video", "description": "How to find the distance between lines using the Pythagorean Formula", "slug": "distance-formula"}, {"path": "khan/math/geometry/analytic-geometry-topic/cc-distances-between-points/distance_formula/", "id": "distance_formula", "title": "Distance formula", "description": "Use the Pythagorean theorem to find the distance between two points on the coordinate plane.", "slug": "distance_formula", "kind": "Exercise"}, {"path": "khan/math/geometry/analytic-geometry-topic/cc-distances-between-points/midpoint-formula/", "id": "Ez_-RwV9WVo", "title": "Midpoint formula", "kind": "Video", "description": "Midpoint Formula", "slug": "midpoint-formula"}, {"path": "khan/math/geometry/analytic-geometry-topic/cc-distances-between-points/midpoint_formula/", "id": "midpoint_formula", "title": "Midpoint formula", "description": "Find the midpoint of a segment on the coordinate plane, or find the endpoint of a segment given one point and the midpoint.", "slug": "midpoint_formula", "kind": "Exercise"}, {"path": "khan/math/geometry/analytic-geometry-topic/cc-distances-between-points/ratios-of-distances-between-colinear-points/", "id": "lEGS5ECgFxE", "title": "Ratios of distances between colinear points", "kind": "Video", "slug": "ratios-of-distances-between-colinear-points"}, {"path": "khan/math/geometry/analytic-geometry-topic/cc-distances-between-points/finding-a-point-part-way-between-two-points/", "id": "0rlNHYHhrWs", "title": "Finding a point part way between two points", "kind": "Video", "slug": "finding-a-point-part-way-between-two-points"}, {"path": "khan/math/geometry/analytic-geometry-topic/cc-distances-between-points/dividing-line-segments/", "id": "dividing-line-segments", "title": "Dividing line segments", "slug": "dividing-line-segments", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We are now going to leverage our understanding of the coordinate plane to think about distances between points and ratios of lengths of segments between points.", "node_slug": "cc-distances-between-points", "render_type": "Tutorial", "topic_page_url": "/math/geometry/analytic-geometry-topic/cc-distances-between-points", "extended_slug": "math/geometry/analytic-geometry-topic/cc-distances-between-points", "kind": "Topic", "slug": "cc-distances-between-points"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/", "id": "parallel-and-perpendicular", "hide": false, "title": "Equations of parallel and perpendicular lines", "child_data": [{"kind": "Video", "id": "xe3c54f14"}, {"kind": "Video", "id": "23652"}, {"kind": "Exercise", "id": "13179420"}, {"kind": "Video", "id": "xb8d341b5"}, {"kind": "Exercise", "id": "520927569"}], "children": [{"path": "khan/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/parallel-and-perpendicular-lines-intro/", "id": "V0xounKGEXs", "title": "Parallel and perpendicular lines intro", "kind": "Video", "description": "Do the two lines intersect or stay apart? If they intersect, do they do so thereby creating a 90 degree angle? These are the kinds of questions we ask ourselves when we learn about parallel and perpendicular lines.", "slug": "parallel-and-perpendicular-lines-intro"}, {"path": "khan/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/equations-of-parallel-and-perpendicular-lines/", "id": "9hryH94KFJA", "title": "Equations of parallel and perpendicular lines", "kind": "Video", "description": "Equations of Parallel and Perpendicular Lines", "slug": "equations-of-parallel-and-perpendicular-lines"}, {"path": "khan/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/line_relationships/", "id": "line_relationships", "title": "Equations of parallel and perpendicular lines", "description": "Determine the equation of a line parallel or perpendicular to the given line. Determine the relationship between two linear equations.", "slug": "line_relationships", "kind": "Exercise"}, {"path": "khan/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/distance-between-a-point-and-a-line/", "id": "iATjsfAX8yc", "title": "Distance between a point and a line", "kind": "Video", "slug": "distance-between-a-point-and-a-line"}, {"path": "khan/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/distance_between_point_and_line/", "id": "distance_between_point_and_line", "title": "Distance between point and line", "description": "Find the distance between a point and a line. Some horizontal and vertical lines.", "slug": "distance_between_point_and_line", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "parallel-and-perpendicular", "render_type": "Tutorial", "topic_page_url": "/math/geometry/analytic-geometry-topic/parallel-and-perpendicular", "extended_slug": "math/geometry/analytic-geometry-topic/parallel-and-perpendicular", "kind": "Topic", "slug": "parallel-and-perpendicular"}], "in_knowledge_map": false, "description": "", "node_slug": "analytic-geometry-topic", "render_type": "Topic", "topic_page_url": "/math/geometry/analytic-geometry-topic", "extended_slug": "math/geometry/analytic-geometry-topic", "kind": "Topic", "slug": "analytic-geometry-topic"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/geometric-constructions/", "id": "geometric-constructions", "hide": false, "title": "Geometric constructions", "child_data": [{"kind": "Topic", "id": "x752dd4a0"}, {"kind": "Topic", "id": "x797935b5"}, {"kind": "Topic", "id": "x46a89ecf"}, {"kind": "Topic", "id": "x9352a1c4"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/geometric-constructions/geo-bisectors/", "id": "geo-bisectors", "hide": false, "title": "Constructing bisectors of lines and angles", "child_data": [{"kind": "Video", "id": "x14f9639b"}, {"kind": "Video", "id": "xb27e19ab"}, {"kind": "Video", "id": "x999a7ffd"}, {"kind": "Exercise", "id": "1439850811"}], "children": [{"path": "khan/math/geometry/geometric-constructions/geo-bisectors/constructing-a-perpendicular-bisector-using-a-compass-and-straightedge/", "id": "WR2R_wrdEVY", "title": "Constructing a perpendicular bisector using a compass and straightedge", "kind": "Video", "slug": "constructing-a-perpendicular-bisector-using-a-compass-and-straightedge"}, {"path": "khan/math/geometry/geometric-constructions/geo-bisectors/constructing-a-perpendicular-line-using-a-compass-and-straightedge/", "id": "nM-O8llUdwg", "title": "Constructing a perpendicular line using a compass and straightedge", "kind": "Video", "slug": "constructing-a-perpendicular-line-using-a-compass-and-straightedge"}, {"path": "khan/math/geometry/geometric-constructions/geo-bisectors/constructing-an-angle-bisector-using-a-compass-and-straightedge/", "id": "KNr52iFk7n4", "title": "Constructing an angle bisector using a compass and straightedge", "kind": "Video", "slug": "constructing-an-angle-bisector-using-a-compass-and-straightedge"}, {"path": "khan/math/geometry/geometric-constructions/geo-bisectors/constructions_1/", "id": "constructions_1", "title": "Compass constructions 1", "description": "Circles and straight-edges, oh my!", "slug": "constructions_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "With just a compass and a straightedge (or virtual versions of them), you'll be amazed by how many geometric shapes you can construct perfectly. This tutorial gets you started with the building block of how to bisect angle and lines (and how to construct perpendicular bisectors of lines).", "node_slug": "geo-bisectors", "render_type": "Tutorial", "topic_page_url": "/math/geometry/geometric-constructions/geo-bisectors", "extended_slug": "math/geometry/geometric-constructions/geo-bisectors", "kind": "Topic", "slug": "geo-bisectors"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/geometric-constructions/polygons-inscribed-in-circles/", "id": "polygons-inscribed-in-circles", "hide": false, "title": "Constructing regular polygons inscribed in circles", "child_data": [{"kind": "Video", "id": "xe85c0014"}, {"kind": "Video", "id": "xb4a12e50"}, {"kind": "Video", "id": "x3e59c6d1"}, {"kind": "Exercise", "id": "xdad588d3"}], "children": [{"path": "khan/math/geometry/geometric-constructions/polygons-inscribed-in-circles/constructing-square-inscribed-in-circle/", "id": "-gWtl6mdpeY", "title": "Constructing square inscribed in circle", "kind": "Video", "slug": "constructing-square-inscribed-in-circle"}, {"path": "khan/math/geometry/geometric-constructions/polygons-inscribed-in-circles/constructing-equilateral-triangle-inscribed-in-circle/", "id": "gWMTTP58_J0", "title": "Constructing equilateral triangle inscribed in circle", "kind": "Video", "slug": "constructing-equilateral-triangle-inscribed-in-circle"}, {"path": "khan/math/geometry/geometric-constructions/polygons-inscribed-in-circles/constructing-regular-hexagon-inscribed-in-circle/", "id": "Yu4eqwGFJK8", "title": "Constructing regular hexagon inscribed in circle", "kind": "Video", "slug": "constructing-regular-hexagon-inscribed-in-circle"}, {"path": "khan/math/geometry/geometric-constructions/polygons-inscribed-in-circles/constructions_2/", "id": "constructions_2", "title": "Compass constructions 2", "slug": "constructions_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Have you ever wondered how people would draw a square, equilateral triangle or even hexagon before there were computers? Well, now you're going to do just that (ironically, with a computer). Using our virtual compass and straightedge, you'll construct several regular shapes (by inscribing them inside circles).", "node_slug": "polygons-inscribed-in-circles", "render_type": "Tutorial", "topic_page_url": "/math/geometry/geometric-constructions/polygons-inscribed-in-circles", "extended_slug": "math/geometry/geometric-constructions/polygons-inscribed-in-circles", "kind": "Topic", "slug": "polygons-inscribed-in-circles"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/geometric-constructions/circum-in-circles/", "id": "circum-in-circles", "hide": false, "title": "Constructing circumcircles and incircles", "child_data": [{"kind": "Video", "id": "x22e61e65"}, {"kind": "Video", "id": "xba7a49ce"}, {"kind": "Exercise", "id": "xb5f04dcc"}], "children": [{"path": "khan/math/geometry/geometric-constructions/circum-in-circles/constructing-circle-inscribing-triangle/", "id": "lmm767eIsGU", "title": "Constructing circle inscribing triangle", "kind": "Video", "slug": "constructing-circle-inscribing-triangle"}, {"path": "khan/math/geometry/geometric-constructions/circum-in-circles/constructing-circumscribing-circle/", "id": "eSjbEWb4Qp4", "title": "Constructing circumscribing circle", "kind": "Video", "slug": "constructing-circumscribing-circle"}, {"path": "khan/math/geometry/geometric-constructions/circum-in-circles/inscribing_and_circumscribing_circles_on_a_triangle/", "id": "inscribing_and_circumscribing_circles_on_a_triangle", "title": "Inscribing and circumscribing circles on a triangle", "slug": "inscribing_and_circumscribing_circles_on_a_triangle", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In our study of triangles, we spent a decent amount of time think about incenters (the intersections of the angle bisectors) and circumcenters (the intersections of the perpendicular bisectors). We'll now leverage this knowledge to actually construct circle inscribed and circumscribed about a triangle using only a compass and straightedge (actually virtual versions of them).", "node_slug": "circum-in-circles", "render_type": "Tutorial", "topic_page_url": "/math/geometry/geometric-constructions/circum-in-circles", "extended_slug": "math/geometry/geometric-constructions/circum-in-circles", "kind": "Topic", "slug": "circum-in-circles"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/geometric-constructions/constructing-tangents/", "id": "constructing-tangents", "hide": false, "title": "Constructing a line tangent to a circle", "child_data": [{"kind": "Video", "id": "xd131cdd3"}, {"kind": "Video", "id": "x6b83da1c"}, {"kind": "Exercise", "id": "x076451bd"}], "children": [{"path": "khan/math/geometry/geometric-constructions/constructing-tangents/constructing-a-tangent-line-using-compass-and-straightedge/", "id": "n5cKWjZqpIE", "title": "Constructing a tangent line using compass and straightedge", "kind": "Video", "slug": "constructing-a-tangent-line-using-compass-and-straightedge"}, {"path": "khan/math/geometry/geometric-constructions/constructing-tangents/another-example-using-compass-and-straightedge-for-tangent-line/", "id": "g_dStt4st2I", "title": "Another example using compass and straightedge for tangent line", "kind": "Video", "slug": "another-example-using-compass-and-straightedge-for-tangent-line"}, {"path": "khan/math/geometry/geometric-constructions/constructing-tangents/constructions_3/", "id": "constructions_3", "title": "Constructing a line tangent to a circle", "slug": "constructions_3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "constructing-tangents", "render_type": "Tutorial", "topic_page_url": "/math/geometry/geometric-constructions/constructing-tangents", "extended_slug": "math/geometry/geometric-constructions/constructing-tangents", "kind": "Topic", "slug": "constructing-tangents"}], "in_knowledge_map": false, "description": "We now have fancy computers to help us perfectly draw things, but have you ever wondered how people drew perfect circles or angle bisectors or perpendicular bisectors back in the day. Well this tutorial will have you doing just as your grandparents did (actually, a little different since you'll still be using a computer to draw circles and lines with a virtual compass and straightedge).", "node_slug": "geometric-constructions", "render_type": "Topic", "topic_page_url": "/math/geometry/geometric-constructions", "extended_slug": "math/geometry/geometric-constructions", "kind": "Topic", "slug": "geometric-constructions"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/geometry/geometry-miscellaneous/", "id": "geometry-miscellaneous", "hide": false, "title": "Miscellaneous", "child_data": [{"kind": "Topic", "id": "x74e68db2"}, {"kind": "Topic", "id": "xc36c5d6b"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/math/geometry/geometry-miscellaneous/geo-warmup/", "id": "geo-warmup", "hide": false, "title": "Geometry readiness warmup", "child_data": [{"kind": "Exercise", "id": "xfcc875ff"}], "children": [{"path": "khan/math/geometry/geometry-miscellaneous/geo-warmup/geometry-warmup/", "id": "geometry-warmup", "title": "Geometry warmup", "description": "Are you ready to tackle geometry? Check your understanding of foundational skills with this short quiz.", "slug": "geometry-warmup", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "geo-warmup", "render_type": "Tutorial", "topic_page_url": "/math/geometry/geometry-miscellaneous/geo-warmup", "extended_slug": "math/geometry/geometry-miscellaneous/geo-warmup", "kind": "Topic", "slug": "geo-warmup"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/", "id": "geometry-worked-examples", "hide": false, "title": "Worked examples", "child_data": [{"kind": "Video", "id": "283213903"}, {"kind": "Video", "id": "283213900"}, {"kind": "Video", "id": "24434"}, {"kind": "Video", "id": "24436"}, {"kind": "Video", "id": "24438"}, {"kind": "Video", "id": "4802217"}, {"kind": "Video", "id": "24444"}, {"kind": "Video", "id": "24446"}, {"kind": "Video", "id": "24448"}, {"kind": "Video", "id": "24450"}, {"kind": "Video", "id": "24452"}, {"kind": "Video", "id": "24454"}, {"kind": "Video", "id": "24456"}, {"kind": "Video", "id": "24458"}, {"kind": "Video", "id": "24460"}, {"kind": "Exercise", "id": "1439850811"}, {"kind": "Video", "id": "24462"}, {"kind": "Video", "id": "24464"}, {"kind": "Video", "id": "24466"}], "children": [{"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/interesting-perimeter-and-area-problems/", "id": "vWXMDIazHjA", "title": "Interesting perimeter and area problems", "kind": "Video", "description": "Three example problems involving perimeter and area", "slug": "interesting-perimeter-and-area-problems"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/challenging-perimeter-problem/", "id": "1uWZNW5PF-s", "title": "Challenging perimeter problem", "kind": "Video", "description": "Perimeter of rectangle covered by 9 non-overlapping squares. From 2000 American Invitational Math Exam", "slug": "challenging-perimeter-problem"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-deductive-reasoning/", "id": "GluohfOedQE", "title": "CA Geometry: Deductive reasoning", "kind": "Video", "description": "1-3, deductive reasoning and congruent angles", "slug": "ca-geometry-deductive-reasoning"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-proof-by-contradiction/", "id": "u6O0YHyarlI", "title": "CA Geometry: Proof by contradiction", "kind": "Video", "description": "4-6, proof by contradiction", "slug": "ca-geometry-proof-by-contradiction"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-more-proofs/", "id": "4PPMnI8-Zsc", "title": "CA Geometry: More proofs", "kind": "Video", "description": "7-10, more proofs (10 continued in next video)", "slug": "ca-geometry-more-proofs"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-similar-triangles-1/", "id": "bWTtHKSEcdI", "title": "CA Geometry: Similar triangles 1", "kind": "Video", "description": "10-14, similar triangles", "slug": "ca-geometry-similar-triangles-1"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-more-on-congruent-and-similar-triangles/", "id": "FVSgVMVZZ-4", "title": "CA Geometry: More on congruent and similar triangles", "kind": "Video", "description": "17-20, more similar and congruent triangles", "slug": "ca-geometry-more-on-congruent-and-similar-triangles"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-triangles-and-parallelograms/", "id": "h0FFEBHBufo", "title": "CA Geometry: Triangles and parallelograms", "kind": "Video", "description": "21-25, triangles and parallelograms", "slug": "ca-geometry-triangles-and-parallelograms"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-area-pythagorean-theorem/", "id": "jRrRqMJbHKc", "title": "CA Geometry: Area, pythagorean theorem", "kind": "Video", "description": "26-30, area, circumference, pythagorean theorem", "slug": "ca-geometry-area-pythagorean-theorem"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-area-circumference-volume/", "id": "BJSk1joCQsM", "title": "CA Geometry: Area, circumference, volume", "kind": "Video", "description": "31-35, area, circumference and volume", "slug": "ca-geometry-area-circumference-volume"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-pythagorean-theorem-area/", "id": "vaOXkt7uuac", "title": "CA Geometry: Pythagorean theorem, area", "kind": "Video", "description": "36-40, Pythagorean Theorem and Area", "slug": "ca-geometry-pythagorean-theorem-area"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-exterior-angles/", "id": "Ncg1HB5uVLc", "title": "CA Geometry: Exterior angles", "kind": "Video", "description": "41-45, polygons, exterior angles", "slug": "ca-geometry-exterior-angles"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-deducing-angle-measures/", "id": "_HJljJuVHLw", "title": "CA Geometry: Deducing angle measures", "kind": "Video", "description": "46-50, deducing the measure of angles", "slug": "ca-geometry-deducing-angle-measures"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-pythagorean-theorem-compass-constructions/", "id": "6EY0E3z-hsU", "title": "CA Geometry: Pythagorean theorem, compass constructions", "kind": "Video", "description": "51-55, Pythagorean Theorem, compass constructions", "slug": "ca-geometry-pythagorean-theorem-compass-constructions"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-compass-construction/", "id": "79lagkER9qY", "title": "CA Geometry: Compass construction", "kind": "Video", "description": "56-60, compass construction, coordinates", "slug": "ca-geometry-compass-construction"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/constructions_1/", "id": "constructions_1", "title": "Compass constructions 1", "description": "Circles and straight-edges, oh my!", "slug": "constructions_1", "kind": "Exercise"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-basic-trigonometry/", "id": "MyvRxKM0xns", "title": "CA Geometry: Basic trigonometry", "kind": "Video", "description": "61-65, basic trigonometry", "slug": "ca-geometry-basic-trigonometry"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-more-trig/", "id": "8YBQQ0GeusM", "title": "CA Geometry: More trig", "kind": "Video", "description": "66-70, more trigonometry", "slug": "ca-geometry-more-trig"}, {"path": "khan/math/geometry/geometry-miscellaneous/geometry-worked-examples/ca-geometry-circle-area-chords-tangent/", "id": "FJIZPvE3O1A", "title": "CA Geometry: Circle area chords tangent", "kind": "Video", "description": "71-75, area, chords, tangents of circles", "slug": "ca-geometry-circle-area-chords-tangent"}], "in_knowledge_map": false, "description": "Sal does the 80 problems from the released questions from the California Standards Test for Geometry. Basic understanding of Algebra I necessary.", "node_slug": "geometry-worked-examples", "render_type": "Tutorial", "topic_page_url": "/math/geometry/geometry-miscellaneous/geometry-worked-examples", "extended_slug": "math/geometry/geometry-miscellaneous/geometry-worked-examples", "kind": "Topic", "slug": "geometry-worked-examples"}], "in_knowledge_map": false, "description": "", "node_slug": "geometry-miscellaneous", "render_type": "Topic", "topic_page_url": "/math/geometry/geometry-miscellaneous", "extended_slug": "math/geometry/geometry-miscellaneous", "kind": "Topic", "slug": "geometry-miscellaneous"}], "in_knowledge_map": false, "description": "We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine (\"It's good for you!\"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.", "node_slug": "geometry", "render_type": "Subject", "topic_page_url": "/math/geometry", "extended_slug": "math/geometry", "kind": "Topic", "slug": "geometry"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/", "id": "algebra2", "hide": false, "title": "Algebra II", "child_data": [{"kind": "Topic", "id": "x12c891d3"}, {"kind": "Topic", "id": "xacce91de"}, {"kind": "Topic", "id": "x624792a7"}, {"kind": "Topic", "id": "x69101e89"}, {"kind": "Topic", "id": "x5e2afacb"}, {"kind": "Topic", "id": "x72b496f3"}, {"kind": "Topic", "id": "x7db461ca"}, {"kind": "Topic", "id": "x01b58215"}, {"kind": "Topic", "id": "x872c276b"}, {"kind": "Topic", "id": "x5bd354c4"}, {"kind": "Topic", "id": "xf380b814"}, {"kind": "Topic", "id": "xb61c639c"}, {"kind": "Topic", "id": "x67944405"}, {"kind": "Topic", "id": "xfaa3a3d8"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/manipulating-functions/", "id": "manipulating-functions", "hide": false, "title": "Manipulating functions", "child_data": [{"kind": "Topic", "id": "xe99c62ab"}, {"kind": "Topic", "id": "xadbb66e4"}, {"kind": "Topic", "id": "x15c805e4"}, {"kind": "Topic", "id": "x037d41ce"}, {"kind": "Topic", "id": "xe1c47785"}, {"kind": "Topic", "id": "xb64da944"}, {"kind": "Topic", "id": "x4c503342"}, {"kind": "Topic", "id": "x54164ec0"}, {"kind": "Topic", "id": "x87f4c55c"}, {"kind": "Topic", "id": "x60b23c9f"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/manipulating-functions/combining-functions/", "id": "combining-functions", "hide": false, "title": "Combining functions", "child_data": [{"kind": "Video", "id": "364981332"}, {"kind": "Video", "id": "364967636"}, {"kind": "Video", "id": "364954028"}, {"kind": "Video", "id": "364954027"}], "children": [{"path": "khan/math/algebra2/manipulating-functions/combining-functions/sum-of-functions/", "id": "n34dqyVCXs4", "title": "How to combine functions by adding them (example)", "kind": "Video", "description": "Sal solves the following problem: given that f(x)=9-x^2 and g(x)=5x^2+2x+1, find (f+g)(x). He explains that generally, (f+g)(x)=f(x)+g(x).", "slug": "sum-of-functions"}, {"path": "khan/math/algebra2/manipulating-functions/combining-functions/difference-of-functions/", "id": "KvMyZY9upuA", "title": "How to combine functions by subtracting them (example)", "kind": "Video", "description": "Sal solves the following problem: given that f(x)=2x\u221a5-4 and g(x)=x^2+2x\u221a5-1, find (g-f)(x). He explains that generally, (f-g)(x)=f(x)-g(x).", "slug": "difference-of-functions"}, {"path": "khan/math/algebra2/manipulating-functions/combining-functions/product-of-functions/", "id": "JKvmAexeMgY", "title": "How to combine functions by multiplying them (example)", "kind": "Video", "description": "Sal solves the following problem: given that f(x)=7x-5 and g(x)=x^3+4x, find (f*g)(x). He explains that generally, (f*g)(x)=f(x)*g(x).", "slug": "product-of-functions"}, {"path": "khan/math/algebra2/manipulating-functions/combining-functions/quotient-of-functions/", "id": "u9v_bakOIcU", "title": "How to combine functions by dividing them (example)", "kind": "Video", "description": "Sal solves the following problem: given that f(x)=2x^2+15x-8 and g(x)=x^2+10x+16, find (f/g)(x). He explains that generally, (f/g)(x)=f(x)/g(x).", "slug": "quotient-of-functions"}], "in_knowledge_map": false, "description": "Learn how to take two basic functions and combine them into a new function which is their sum, difference, product, or quotient.", "node_slug": "combining-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/manipulating-functions/combining-functions", "extended_slug": "math/algebra2/manipulating-functions/combining-functions", "kind": "Topic", "slug": "combining-functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/manipulating-functions/composing-functions/", "id": "composing-functions", "hide": false, "title": "Composing functions", "child_data": [{"kind": "Video", "id": "x2114d642"}, {"kind": "Video", "id": "xf6ad0f67"}, {"kind": "Exercise", "id": "x9dd681f5"}, {"kind": "Exercise", "id": "xffeb1695"}, {"kind": "Video", "id": "xb73f4bfe"}, {"kind": "Exercise", "id": "x23127332"}], "children": [{"path": "khan/math/algebra2/manipulating-functions/composing-functions/function-composition/", "id": "wUNWjd4bMmw", "title": "Introduction to function composition", "kind": "Video", "description": "Sal explains what it means to compose two functions. He gives examples for finding the values of composite functions given the equations, the graphs, or tables of values of the two composed functions.", "slug": "function-composition"}, {"path": "khan/math/algebra2/manipulating-functions/composing-functions/evaluating-composite-functions-example-1/", "id": "jlID_mIJXi4", "title": "How to evaluate a composite function given the formulas of the composed functions (example)", "kind": "Video", "description": "Sal solves the following problem: Given that h(x)=3x and g(t)=-2t-2-h(t), find h(g(8)).", "slug": "evaluating-composite-functions-example-1"}, {"path": "khan/math/algebra2/manipulating-functions/composing-functions/evaluate-composite-functions-from-formulas/", "id": "evaluate-composite-functions-from-formulas", "title": "Evaluate composite functions from formulas", "description": "Given the formulas of two functions, evaluate the composition of the two functions at a given input.", "slug": "evaluate-composite-functions-from-formulas", "kind": "Exercise"}, {"path": "khan/math/algebra2/manipulating-functions/composing-functions/evaluate-composite-functions-from-graphs-and-tables/", "id": "evaluate-composite-functions-from-graphs-and-tables", "title": "Evaluate composite functions from graphs and tables", "description": "Given the graphs, or some tables of values, of two functions, evaluate the composition of those functions at a given input.", "slug": "evaluate-composite-functions-from-graphs-and-tables", "kind": "Exercise"}, {"path": "khan/math/algebra2/manipulating-functions/composing-functions/new-function-from-composition/", "id": "_b-2rZpX5z4", "title": "How to find the formula of a composite function given the formulas of the composed functions (example)", "kind": "Video", "description": "Sal solves the following problem: Given that f(x)=\u221a(x^2-1) and g(x)=x/(1+x), find f(g(x)) and g(f(x)).", "slug": "new-function-from-composition"}, {"path": "khan/math/algebra2/manipulating-functions/composing-functions/compose-functions/", "id": "compose-functions", "title": "Compose functions", "description": "Given the formulas of two functions, find the formula of their composition.", "slug": "compose-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn what function composition is, how to to work with composite functions, and how to find the formulas of the composition of two functions.", "node_slug": "composing-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/manipulating-functions/composing-functions", "extended_slug": "math/algebra2/manipulating-functions/composing-functions", "kind": "Topic", "slug": "composing-functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/manipulating-functions/shifting-functions/", "id": "shifting-functions", "hide": false, "title": "Shifting functions", "child_data": [{"kind": "Video", "id": "xb05fec98"}, {"kind": "Video", "id": "23740"}, {"kind": "Exercise", "id": "x458b6ebf"}], "children": [{"path": "khan/math/algebra2/manipulating-functions/shifting-functions/shifting-and-reflecting-functions/", "id": "ENFNyNPYfZU", "title": "Shifting and reflecting functions", "kind": "Video", "description": "Sal walks through several examples of how to write g(x) implicitly in terms of f(x) when g(x) is a shift or a reflection of f(x).", "slug": "shifting-and-reflecting-functions"}, {"path": "khan/math/algebra2/manipulating-functions/shifting-functions/graphs-of-square-root-functions/", "id": "outcfkh69U0", "title": "Shifting and stretching functions", "kind": "Video", "description": "Sal graphs y=\u221ax. Then, he shows a few examples of how we can shift and stretch the graphs of y=\u221ax and y=x^2, and how the equations of those graphs look.", "slug": "graphs-of-square-root-functions"}, {"path": "khan/math/algebra2/manipulating-functions/shifting-functions/shift-functions/", "id": "shift-functions", "title": "Shift functions", "description": "Shift functions horizontally and vertically, and practice the relationship between the graphical and the algebraic representations of those shifts.", "slug": "shift-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to transform functions so their graph is shifted horizontally or vertically. Learn how to find the equation of a function that is a shift of another function.", "node_slug": "shifting-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/manipulating-functions/shifting-functions", "extended_slug": "math/algebra2/manipulating-functions/shifting-functions", "kind": "Topic", "slug": "shifting-functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/manipulating-functions/stretching-functions/", "id": "stretching-functions", "hide": false, "title": "Stretching functions", "child_data": [{"kind": "Video", "id": "xb05fec98"}, {"kind": "Video", "id": "23740"}, {"kind": "Exercise", "id": "3813824"}], "children": [{"path": "khan/math/algebra2/manipulating-functions/stretching-functions/shifting-and-reflecting-functions/", "id": "ENFNyNPYfZU", "title": "Shifting and reflecting functions", "kind": "Video", "description": "Sal walks through several examples of how to write g(x) implicitly in terms of f(x) when g(x) is a shift or a reflection of f(x).", "slug": "shifting-and-reflecting-functions"}, {"path": "khan/math/algebra2/manipulating-functions/stretching-functions/graphs-of-square-root-functions/", "id": "outcfkh69U0", "title": "Shifting and stretching functions", "kind": "Video", "description": "Sal graphs y=\u221ax. Then, he shows a few examples of how we can shift and stretch the graphs of y=\u221ax and y=x^2, and how the equations of those graphs look.", "slug": "graphs-of-square-root-functions"}, {"path": "khan/math/algebra2/manipulating-functions/stretching-functions/shifting_and_reflecting_functions/", "id": "shifting_and_reflecting_functions", "title": "Summary: Transforming functions", "description": "Given the graphs of functions f and g where g is a transformation of f, determine the formula of g in terms of f.", "slug": "shifting_and_reflecting_functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to transform functions so their graph is stretched horizontally or vertically. Learn how to find the equation of a function that is a stretch of another function.", "node_slug": "stretching-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/manipulating-functions/stretching-functions", "extended_slug": "math/algebra2/manipulating-functions/stretching-functions", "kind": "Topic", "slug": "stretching-functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/manipulating-functions/combining-and-composing-modeling-functions/", "id": "combining-and-composing-modeling-functions", "hide": false, "title": "Modeling situations by combining and composing functions", "child_data": [{"kind": "Video", "id": "x9e853ab5"}, {"kind": "Exercise", "id": "x551d5a1f"}, {"kind": "Video", "id": "x7cd69a43"}, {"kind": "Exercise", "id": "xf78e711f"}], "children": [{"path": "khan/math/algebra2/manipulating-functions/combining-and-composing-modeling-functions/modeling-with-combined-functions/", "id": "2IWhknVzeJM", "title": "How to model a complex situation by combining two basic modeling functions (example)", "kind": "Video", "description": "Sal is modeling the height of a tower that is being built on top of a growing tree, by adding the functions that model the growth of the tower and the tree in separate.", "slug": "modeling-with-combined-functions"}, {"path": "khan/math/algebra2/manipulating-functions/combining-and-composing-modeling-functions/combining-functions-with-arithmetic-operations/", "id": "combining-functions-with-arithmetic-operations", "title": "Model situations by combining functions using arithmetic operations", "description": "Given two basic modeling functions, combine them using the appropriate arithmetic operation in order to model a more complex situation.", "slug": "combining-functions-with-arithmetic-operations", "kind": "Exercise"}, {"path": "khan/math/algebra2/manipulating-functions/combining-and-composing-modeling-functions/modeling-with-composite-functions/", "id": "LG6g7gxupHg", "title": "How to model a complex situation by composing two basic modeling functions (example)", "kind": "Video", "description": "Given the formula of the volume of fuel in a tank as a function of its depth, and the formula of the depth as a function of time, Sal finds the formula of the volume as a function of time, by using function composition.", "slug": "modeling-with-composite-functions"}, {"path": "khan/math/algebra2/manipulating-functions/combining-and-composing-modeling-functions/modeling-with-composite-functions_1/", "id": "modeling-with-composite-functions", "title": "Model situations by composing functions", "description": "Practice composing two given basic modeling functions\u00a0in order to model a more complex situation.", "slug": "modeling-with-composite-functions_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Make use of knowledge in combining and composing functions, by modeling complex real-world situations.", "node_slug": "combining-and-composing-modeling-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/manipulating-functions/combining-and-composing-modeling-functions", "extended_slug": "math/algebra2/manipulating-functions/combining-and-composing-modeling-functions", "kind": "Topic", "slug": "combining-and-composing-modeling-functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/manipulating-functions/introduction-to-inverses-of-functions/", "id": "introduction-to-inverses-of-functions", "hide": false, "title": "Introduction to inverses of functions", "child_data": [{"kind": "Video", "id": "26633"}, {"kind": "Video", "id": "xd5d133d9"}, {"kind": "Video", "id": "x2835aa81"}, {"kind": "Exercise", "id": "x73bb9f74"}], "children": [{"path": "khan/math/algebra2/manipulating-functions/introduction-to-inverses-of-functions/introduction-to-function-inverses/", "id": "W84lObmOp8M", "title": "Introduction to function inverses", "kind": "Video", "description": "Sal explains what inverse functions are. Then he explain how to algebraically find the inverse of a function and looks at the graphical relationship between inverse functions.", "slug": "introduction-to-function-inverses"}, {"path": "khan/math/algebra2/manipulating-functions/introduction-to-inverses-of-functions/understanding-inverse-functions/", "id": "KzaPBzFFLRM", "title": "Inputs and outputs of inverse functions", "kind": "Video", "description": "Sal explains that if f(a)=b, then f^-1(b)=a, or in other words, the inverse function of f outputs a when its input is b.", "slug": "understanding-inverse-functions"}, {"path": "khan/math/algebra2/manipulating-functions/introduction-to-inverses-of-functions/understanding-function-inverses-example/", "id": "KPeS2gdizhQ", "title": "How to graph the inverse of a linear function given the graph of the function (example)", "kind": "Video", "description": "Sal is given a line segment on the coordinate plane, and he graphs the inverse of the function represented by that segment.", "slug": "understanding-function-inverses-example"}, {"path": "khan/math/algebra2/manipulating-functions/introduction-to-inverses-of-functions/understanding-inverse-functions_1/", "id": "understanding-inverse-functions", "title": "Find inverse values of functions", "description": "Practice evaluating the inverse function of a function that is given either as a formula, or as a graph, or as a table of values.", "slug": "understanding-inverse-functions_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn what inverses of functions are, and gain some experience with them by finding the outputs of the inverse of a function given that function.", "node_slug": "introduction-to-inverses-of-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/manipulating-functions/introduction-to-inverses-of-functions", "extended_slug": "math/algebra2/manipulating-functions/introduction-to-inverses-of-functions", "kind": "Topic", "slug": "introduction-to-inverses-of-functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/manipulating-functions/finding-inverse-functions/", "id": "finding-inverse-functions", "hide": false, "title": "Finding inverse functions", "child_data": [{"kind": "Video", "id": "26633"}, {"kind": "Video", "id": "26634"}, {"kind": "Video", "id": "26635"}, {"kind": "Video", "id": "26636"}, {"kind": "Exercise", "id": "xe32ec79b"}], "children": [{"path": "khan/math/algebra2/manipulating-functions/finding-inverse-functions/introduction-to-function-inverses/", "id": "W84lObmOp8M", "title": "Introduction to function inverses", "kind": "Video", "description": "Sal explains what inverse functions are. Then he explain how to algebraically find the inverse of a function and looks at the graphical relationship between inverse functions.", "slug": "introduction-to-function-inverses"}, {"path": "khan/math/algebra2/manipulating-functions/finding-inverse-functions/function-inverse-example-1/", "id": "wSiamij_i_k", "title": "How to find the inverse of a linear function (example)", "kind": "Video", "description": "Sal finds the inverses of f(x)=-x+4 and g(x)=-2x-1.", "slug": "function-inverse-example-1"}, {"path": "khan/math/algebra2/manipulating-functions/finding-inverse-functions/function-inverses-example-2/", "id": "aeyFb2eVH1c", "title": "How to find the inverse of a quadratic function (example)", "kind": "Video", "description": "Sal finds the inverse of f(x)=(x+2)^2+1.", "slug": "function-inverses-example-2"}, {"path": "khan/math/algebra2/manipulating-functions/finding-inverse-functions/function-inverses-example-3/", "id": "Bq9cq9FZuNM", "title": "How to find the inverse of a quadratic function (example)", "kind": "Video", "description": "Sal finds the inverse of f(x)=(x-1)^2-2.", "slug": "function-inverses-example-3"}, {"path": "khan/math/algebra2/manipulating-functions/finding-inverse-functions/algebraically-finding-inverses/", "id": "algebraically-finding-inverses", "title": "Find inverses of polynomial, radical, and rational functions", "description": "Practice finding the formula of the inverse function of a given function algebraically.", "slug": "algebraically-finding-inverses", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to find the inverses of polynomials functions, radical functions, and rational functions.", "node_slug": "finding-inverse-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/manipulating-functions/finding-inverse-functions", "extended_slug": "math/algebra2/manipulating-functions/finding-inverse-functions", "kind": "Topic", "slug": "finding-inverse-functions"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/algebra2/manipulating-functions/verifying-that-functions-are-inverses/", "id": "verifying-that-functions-are-inverses", "hide": false, "title": "Verifying that functions are inverses", "child_data": [{"kind": "Exercise", "id": "4089220"}], "children": [{"path": "khan/math/algebra2/manipulating-functions/verifying-that-functions-are-inverses/inverses_of_functions/", "id": "inverses_of_functions", "title": "Verify that two functions are inverses", "description": "Given the formulas of two functions, compose the functions and determine whether they are inverses of each other.", "slug": "inverses_of_functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to check whether a pair of functions are the inverses of one another.", "node_slug": "verifying-that-functions-are-inverses", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/manipulating-functions/verifying-that-functions-are-inverses", "extended_slug": "math/algebra2/manipulating-functions/verifying-that-functions-are-inverses", "kind": "Topic", "slug": "verifying-that-functions-are-inverses"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/manipulating-functions/invertible-functions/", "id": "invertible-functions", "hide": false, "title": "Determining whether a function is invertible", "child_data": [{"kind": "Video", "id": "x5679daee"}, {"kind": "Exercise", "id": "xb3139fdc"}], "children": [{"path": "khan/math/algebra2/manipulating-functions/invertible-functions/restricting-trig-function-domain/", "id": "tCV9VyIIaw0", "title": "How to restrict the domain of a trig function to make it invertible (example)", "kind": "Video", "description": "Sal is given the graph of a trigonometric function, and he discusses ways in which he can change the function to make it invertible.", "slug": "restricting-trig-function-domain"}, {"path": "khan/math/algebra2/manipulating-functions/invertible-functions/inverse-domain-range/", "id": "inverse-domain-range", "title": "Analyze invertible and non-invertible functions", "description": "Determine whether a given function is invertible or not. If it isn't, find the necessary changes to make in order to make the function invertible.", "slug": "inverse-domain-range", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn about the conditions for a function to be invertible, and learn how to manipulate functions to make them invertible.", "node_slug": "invertible-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/manipulating-functions/invertible-functions", "extended_slug": "math/algebra2/manipulating-functions/invertible-functions", "kind": "Topic", "slug": "invertible-functions"}], "in_knowledge_map": false, "description": "A great cook knows how to take basic ingredients and prepare a delicious meal. In this topic, you will become function-chefs! You will learn how to combine functions with arithmetic operations and how to compose functions. You will also learn how to transform functions in ways that shift, reflect, or stretch their graphs. Finally, you will learn about inverse functions and how to find them!", "node_slug": "manipulating-functions", "render_type": "Topic", "topic_page_url": "/math/algebra2/manipulating-functions", "extended_slug": "math/algebra2/manipulating-functions", "kind": "Topic", "slug": "manipulating-functions"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/systems_eq_ineq/", "id": "systems_eq_ineq", "hide": false, "title": "Systems of equations and inequalities", "child_data": [{"kind": "Topic", "id": "xca9a043a"}, {"kind": "Topic", "id": "x94b5ee59"}, {"kind": "Topic", "id": "x0460f0af"}, {"kind": "Topic", "id": "xd7f3d444"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/systems_eq_ineq/fancier_systems_precalc/", "id": "fancier_systems_precalc", "hide": false, "title": "Systems with three variables", "child_data": [{"kind": "Video", "id": "33752776"}, {"kind": "Video", "id": "33752777"}, {"kind": "Video", "id": "561884164"}, {"kind": "Video", "id": "465991886"}, {"kind": "Video", "id": "33752778"}], "children": [{"path": "khan/math/algebra2/systems_eq_ineq/fancier_systems_precalc/systems-of-three-variables/", "id": "pANZpI9sOYg", "title": "Systems of three variables", "kind": "Video", "description": "Systems of Three Variables", "slug": "systems-of-three-variables"}, {"path": "khan/math/algebra2/systems_eq_ineq/fancier_systems_precalc/systems-of-three-variables-2/", "id": "f7cX-Ar2cEM", "title": "Systems of three variables 2", "kind": "Video", "description": "Systems of Three Variables 2", "slug": "systems-of-three-variables-2"}, {"path": "khan/math/algebra2/systems_eq_ineq/fancier_systems_precalc/solutions-to-three-variable-system/", "id": "K38zMmtjxEw", "title": "Solutions to three variable system", "kind": "Video", "description": "Solutions to Three Variable System", "slug": "solutions-to-three-variable-system"}, {"path": "khan/math/algebra2/systems_eq_ineq/fancier_systems_precalc/solutions-to-three-variable-system-2/", "id": "145zOBT0LD4", "title": "Solutions to three variable system 2", "kind": "Video", "description": "u14 l3 t1 we4 Solutions to Three Variable System", "slug": "solutions-to-three-variable-system-2"}, {"path": "khan/math/algebra2/systems_eq_ineq/fancier_systems_precalc/three-equation-application-problem/", "id": "TJaHNxJk5-4", "title": "Three equation application problem", "kind": "Video", "description": "Three Equation Application Problem", "slug": "three-equation-application-problem"}], "in_knowledge_map": false, "description": "Two equations with two unknowns not challenging enough for you? How about three equations with three unknowns? Visualizing lines in 2-D too easy? Well, now you're going to visualize intersecting planes in 3-D, baby. (Okay, we admit that it is weird for a website to call you \"baby.\")", "node_slug": "fancier_systems_precalc", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/systems_eq_ineq/fancier_systems_precalc", "extended_slug": "math/algebra2/systems_eq_ineq/fancier_systems_precalc", "kind": "Topic", "slug": "fancier_systems_precalc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/", "id": "non-linear-systems-tutorial", "hide": false, "title": "Non-linear systems of equations", "child_data": [{"kind": "Video", "id": "x16a2de2b"}, {"kind": "Video", "id": "x364f568c"}, {"kind": "Exercise", "id": "xed2b9df4"}, {"kind": "Video", "id": "27008"}, {"kind": "Video", "id": "27009"}, {"kind": "Video", "id": "27010"}, {"kind": "Video", "id": "x5bf30ab7"}, {"kind": "Video", "id": "x0698a8ee"}, {"kind": "Video", "id": "x9e7fad26"}, {"kind": "Exercise", "id": "xf7d9445d"}], "children": [{"path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/estimating-a-solution-to-nonlinear-system-with-calculator/", "id": "mXsn-YYUN4Y", "title": "Estimating a solution to nonlinear system with calculator", "kind": "Video", "slug": "estimating-a-solution-to-nonlinear-system-with-calculator"}, {"path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/estimating-a-solution-to-nonlinear-system-with-calculator-part-2/", "id": "wUb7tWgv49U", "title": "Estimating a solution to nonlinear system with calculator part 2", "kind": "Video", "slug": "estimating-a-solution-to-nonlinear-system-with-calculator-part-2"}, {"path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/intersecting-functions/", "id": "intersecting-functions", "title": "Intersecting functions", "slug": "intersecting-functions", "kind": "Exercise"}, {"path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/non-linear-systems-of-equations-1/", "id": "hjigR_rHKDI", "title": "Non-linear systems of equations 1", "kind": "Video", "description": "Non-Linear Systems of Equations 1", "slug": "non-linear-systems-of-equations-1"}, {"path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/non-linear-systems-of-equations-2/", "id": "XPf8LMu7QSw", "title": "Non-linear systems of equations 2", "kind": "Video", "description": "Non-Linear Systems of Equations 2", "slug": "non-linear-systems-of-equations-2"}, {"path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/non-linear-systems-of-equations-3/", "id": "FksgVpM_iXs", "title": "Non-linear systems of equations 3", "kind": "Video", "description": "Non-Linear Systems of Equations 3", "slug": "non-linear-systems-of-equations-3"}, {"path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/systems-of-nonlinear-equations-1/", "id": "cdY0b4ziR5U", "title": "Systems of nonlinear equations 1", "kind": "Video", "slug": "systems-of-nonlinear-equations-1"}, {"path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/systems-of-nonlinear-equations-2/", "id": "GQf1vjfxuo8", "title": "Systems of nonlinear equations 2", "kind": "Video", "slug": "systems-of-nonlinear-equations-2"}, {"path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/systems-of-nonlinear-equations-3/", "id": "swFohliPgmQ", "title": "Systems of nonlinear equations 3", "kind": "Video", "slug": "systems-of-nonlinear-equations-3"}, {"path": "khan/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial/systems-of-nonlinear-equations/", "id": "systems-of-nonlinear-equations", "title": "Systems of nonlinear equations", "slug": "systems-of-nonlinear-equations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Tired of linear systems? Well, we might just bring a little nonlinearity into your life, honey. (You might want to brush up on your solving quadratics before tackling the non-linear systems.) As always, try to pause the videos and do them before Sal does!", "node_slug": "non-linear-systems-tutorial", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/systems_eq_ineq/non-linear-systems-tutorial", "extended_slug": "math/algebra2/systems_eq_ineq/non-linear-systems-tutorial", "kind": "Topic", "slug": "non-linear-systems-tutorial"}], "in_knowledge_map": false, "description": "What happens when we have many variables but also many constraints.", "node_slug": "systems_eq_ineq", "render_type": "Topic", "topic_page_url": "/math/algebra2/systems_eq_ineq", "extended_slug": "math/algebra2/systems_eq_ineq", "kind": "Topic", "slug": "systems_eq_ineq"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/arithmetic-with-polynomials/", "id": "arithmetic-with-polynomials", "hide": false, "title": "Arithmetic with polynomials", "child_data": [{"kind": "Topic", "id": "x30a3d9d5"}, {"kind": "Topic", "id": "xd784f8cc"}, {"kind": "Topic", "id": "xf62b9d66"}, {"kind": "Topic", "id": "x331ffe8f"}, {"kind": "Topic", "id": "x5dc76fec"}, {"kind": "Topic", "id": "xa40977ee"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/arithmetic-with-polynomials/adding-and-subtracting-polynomials-review/", "id": "adding-and-subtracting-polynomials-review", "hide": false, "title": "Adding and subtracting polynomials", "child_data": [{"kind": "Video", "id": "26922"}, {"kind": "Exercise", "id": "357414238"}, {"kind": "Video", "id": "13179529"}, {"kind": "Exercise", "id": "xa157ae82"}], "children": [{"path": "khan/math/algebra2/arithmetic-with-polynomials/adding-and-subtracting-polynomials-review/adding-and-subtracting-polynomials-3/", "id": "DMyhUb1pZT0", "title": "How to add and subtract multiple polynomials (example)", "kind": "Video", "description": "Sal simplifies (x^3 + 3x - 6) + (-2x^2 + x - 2) - (3x - 4).", "slug": "adding-and-subtracting-polynomials-3"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/adding-and-subtracting-polynomials-review/adding_and_subtracting_polynomials/", "id": "adding_and_subtracting_polynomials", "title": "Add and subtract polynomials with one variable", "description": "Practice the addition and subtraction of polynomial expressions with a single variable", "slug": "adding_and_subtracting_polynomials", "kind": "Exercise"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/adding-and-subtracting-polynomials-review/subtracting-polynomials-with-multiple-variables/", "id": "AqMT_zB9rP8", "title": "How to subtract polynomials with two variables (example)", "kind": "Video", "description": "Sal simplifies (4x^2y - 3xy + 25) - (9y^2x + 7xy - 20).", "slug": "subtracting-polynomials-with-multiple-variables"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/adding-and-subtracting-polynomials-review/adding-and-subtracting-polynomials-2/", "id": "adding-and-subtracting-polynomials-2", "title": "Add and subtract polynomials with two variables", "description": "Add and subtract polynomial expressions with two variables", "slug": "adding-and-subtracting-polynomials-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to add and subtract two polynomials to obtain another polynomial. For instance, express (3x^3+2x-1)+(2x^4-x^3+7x) as a polynomial in standard form.", "node_slug": "adding-and-subtracting-polynomials-review", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/arithmetic-with-polynomials/adding-and-subtracting-polynomials-review", "extended_slug": "math/algebra2/arithmetic-with-polynomials/adding-and-subtracting-polynomials-review", "kind": "Topic", "slug": "adding-and-subtracting-polynomials-review"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/arithmetic-with-polynomials/multiplying-polynomials-review/", "id": "multiplying-polynomials-review", "hide": false, "title": "Multiplying polynomials", "child_data": [{"kind": "Video", "id": "13179530"}, {"kind": "Exercise", "id": "357437094"}, {"kind": "Video", "id": "23706"}, {"kind": "Exercise", "id": "x0597eb78"}], "children": [{"path": "khan/math/algebra2/arithmetic-with-polynomials/multiplying-polynomials-review/more-multiplying-polynomials/", "id": "D6mivA_8L8U", "title": "How to multiply a binomial by a polynomial (example)", "kind": "Video", "description": "Sal multiplies (10a-3) by (5a^2 + 7a - 1).", "slug": "more-multiplying-polynomials"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/multiplying-polynomials-review/multiplying_polynomials/", "id": "multiplying_polynomials", "title": "Multiply binomials by polynomials", "description": "Use the distributive property to express the product of a binomial and a polynomial as a single polynomial.", "slug": "multiplying_polynomials", "kind": "Exercise"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/multiplying-polynomials-review/special-products-of-binomials/", "id": "bFtjG45-Udk", "title": "Introduction to special products of binomials", "kind": "Video", "description": "Sal gives numerous examples of the two special product forms: perfect squares and the difference of two squares.", "slug": "special-products-of-binomials"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/multiplying-polynomials-review/finding-special-products/", "id": "finding-special-products", "title": "Find special products of binomials (advanced)", "description": "Find special products (perfect squares and difference of squares) of \"advanced\" binomials: binomials with leading coefficients other than 1; binomials with higher degrees; and binomials with two variables.", "slug": "finding-special-products", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to multiply two polynomials to obtain another polynomial. For instance, express (2x^2+5)*(x^3-2x+6) as a polynomial in standard form.", "node_slug": "multiplying-polynomials-review", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/arithmetic-with-polynomials/multiplying-polynomials-review", "extended_slug": "math/algebra2/arithmetic-with-polynomials/multiplying-polynomials-review", "kind": "Topic", "slug": "multiplying-polynomials-review"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/arithmetic-with-polynomials/long-division-of-polynomials/", "id": "long-division-of-polynomials", "hide": false, "title": "Long division of polynomials", "child_data": [{"kind": "Video", "id": "23780"}, {"kind": "Video", "id": "13179524"}], "children": [{"path": "khan/math/algebra2/arithmetic-with-polynomials/long-division-of-polynomials/polynomial-division/", "id": "FXgV9ySNusc", "title": "Introduction to long division of polynomials", "kind": "Video", "description": "Sal explains what polynomial long division is, and gives various examples of polynomial long divisions.", "slug": "polynomial-division"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/long-division-of-polynomials/dividing-polynomials-1/", "id": "8Wxw9bpKEGQ", "title": "How to divide a quadratic expression by a linear expression using long division (example)", "kind": "Video", "description": "Sal divides (x^2-3x+2) by (x-2) and then checks the solution.", "slug": "dividing-polynomials-1"}], "in_knowledge_map": false, "description": "Learn how to divide two polynomials using long division.", "node_slug": "long-division-of-polynomials", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/arithmetic-with-polynomials/long-division-of-polynomials", "extended_slug": "math/algebra2/arithmetic-with-polynomials/long-division-of-polynomials", "kind": "Topic", "slug": "long-division-of-polynomials"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/arithmetic-with-polynomials/synthetic-division-of-polynomials/", "id": "synthetic-division-of-polynomials", "hide": false, "title": "Synthetic division of polynomials", "child_data": [{"kind": "Video", "id": "948828848"}, {"kind": "Video", "id": "948968139"}, {"kind": "Video", "id": "948944478"}], "children": [{"path": "khan/math/algebra2/arithmetic-with-polynomials/synthetic-division-of-polynomials/synthetic-division/", "id": "1byR9UEQJN0", "title": "Introduction to synthetic division of polynomials", "kind": "Video", "description": "Sal shows how synthetic division of polynomials works.", "slug": "synthetic-division"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/synthetic-division-of-polynomials/synthetic-division-example-2/", "id": "3Ee_huKclEQ", "title": "How to divide polynomials using synthetic division (example)", "kind": "Video", "description": "Sal divides (2x^5-x^3+3x^2-2x+7) by (x-3) using synthetic division.", "slug": "synthetic-division-example-2"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/synthetic-division-of-polynomials/why-synthetic-division-works/", "id": "-nlMXVrgtjw", "title": "Why synthetic division works", "kind": "Video", "description": "Sal explains why synthetic division gives you the same result as traditional algebraic long division.", "slug": "why-synthetic-division-works"}], "in_knowledge_map": false, "description": "Learn how to divide polynomials using long division.", "node_slug": "synthetic-division-of-polynomials", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/arithmetic-with-polynomials/synthetic-division-of-polynomials", "extended_slug": "math/algebra2/arithmetic-with-polynomials/synthetic-division-of-polynomials", "kind": "Topic", "slug": "synthetic-division-of-polynomials"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders/", "id": "practice-dividing-polynomials-with-remainders", "hide": false, "title": "Practice dividing polynomials with remainders", "child_data": [{"kind": "Video", "id": "13179523"}, {"kind": "Video", "id": "x4278b219"}, {"kind": "Exercise", "id": "x6f3dc788"}, {"kind": "Video", "id": "13179525"}, {"kind": "Exercise", "id": "x9b457fb6"}, {"kind": "Exercise", "id": "x8c69a68e"}], "children": [{"path": "khan/math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders/polynomial-divided-by-monomial/", "id": "UquFdMg6Z_U", "title": "How to divide a polynomial by a monomial (example)", "kind": "Video", "description": "Sal divides (18x^4-3x^2+6x-4) by 6x.", "slug": "polynomial-divided-by-monomial"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders/dividing-polynomials-with-remainders-example/", "id": "WqNc6My1aNU", "title": "How to find the quotient and remainder of polynomial divided by monomial (example)", "kind": "Video", "description": "Sal divides (7x^6+x^3+2x+1) by X^2, and writes the solution as q(x)+r(x)/x^2, where the degree of the remainder, r(x), is less than the degree of x^2.", "slug": "dividing-polynomials-with-remainders-example"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders/divide-polynomials-by-monomials/", "id": "divide-polynomials-by-monomials", "title": "Divide polynomials by monomials with remainders", "description": "Rewrite expressions of the form a(x)/b(x), where a is a polynomial b is a monomial, in the form q(x)+r(x)/b(x), where q and r are polynomials and the degree of r is less than the degree of b.", "slug": "divide-polynomials-by-monomials", "kind": "Exercise"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders/dividing-polynomials-with-remainders/", "id": "pLCmwHsDYqo", "title": "How to find the quotient and remainder of polynomial divided by polynomial (example)", "kind": "Video", "description": "Sal divides (x^3+5x-4) by (x^2-x+1) using long division.", "slug": "dividing-polynomials-with-remainders"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders/divide-polynomials-by-binomials/", "id": "divide-polynomials-by-binomials", "title": "Divide polynomials by linear binomials with remainders", "description": "Rewrite expressions of the form a(x)/b(x), where a is a polynomial b is a linear binomial, in the form q(x)+r(x)/b(x), where q and r are polynomials and the degree of r is less than the degree of b.", "slug": "divide-polynomials-by-binomials", "kind": "Exercise"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders/dividing-polynomials-with-remainders_1/", "id": "dividing-polynomials-with-remainders", "title": "Divide polynomials by polynomials with remainders", "description": "Rewrite expressions of the form a(x)/b(x), where a and\u00a0b are polynomials, in the form q(x)+r(x)/b(x), where q and r are polynomials and the degree of r is less than the degree of b.", "slug": "dividing-polynomials-with-remainders_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "After learning about the different methods in which we can find the quotient and the remainder of two polynomials, gain some practice with actually performing polynomial division yourself.", "node_slug": "practice-dividing-polynomials-with-remainders", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders", "extended_slug": "math/algebra2/arithmetic-with-polynomials/practice-dividing-polynomials-with-remainders", "kind": "Topic", "slug": "practice-dividing-polynomials-with-remainders"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem/", "id": "polynomial-remainder-theorem", "hide": false, "title": "Polynomial Remainder Theorem", "child_data": [{"kind": "Video", "id": "xdb4ca463"}, {"kind": "Video", "id": "x908ffb83"}, {"kind": "Video", "id": "xd36a1a36"}, {"kind": "Video", "id": "x7ea74388"}, {"kind": "Exercise", "id": "xc54cb0f8"}, {"kind": "Video", "id": "x1f4eea1e"}], "children": [{"path": "khan/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem/polynomial-remainder-theorem/", "id": "MwG6QD352yc", "title": "Introduction to the Polynomial Remainder Theorem", "kind": "Video", "description": "The Polynomial Remainder Theorem allows us to determine whether a linear expression is a factor of a polynomial expression easily. Check it out!", "slug": "polynomial-remainder-theorem"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem/polynomial-remainder-theorem-example/", "id": "MHtTP6vc4RU", "title": "How to find the remainder of a polynomial division using the Polynomial Remainder Theorem (example)", "kind": "Video", "description": "Sal finds the remainder of (-3x^3-4x^2+10x-7) divided by (x-2) using the PRT (Polynomial Remainder Theorem).", "slug": "polynomial-remainder-theorem-example"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem/polynomial-remainder-theorem-to-test-factor/", "id": "JAdNNJynWM4", "title": "How to check if a linear expression is a factor of a polynomial using the Polynomial Remainder Theorem (example)", "kind": "Video", "description": "Sal checks whether (x-3) is a factor of (2x^4-11x^3+15x^2+4x-12) using the PRT (Polynomial Remainder Theorem).", "slug": "polynomial-remainder-theorem-to-test-factor"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem/constructing-a-polynomial-that-has-a-certain-factor/", "id": "e0lBUViss8E", "title": "How to determine the coefficients of a polynomial so it has a certain factor using the Polynomial Remainder Theorem (example)", "kind": "Video", "description": "Sal determines the value of coefficient c in p(x)=x^3+2x^2+cx+10, in order for (x-5) to be a factor of p. The key is using the PRT (Polynomial Remainder Theorem)!", "slug": "constructing-a-polynomial-that-has-a-certain-factor"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem/remainder-theorem-of-polynomials/", "id": "remainder-theorem-of-polynomials", "title": "Use the Polynomial Remainder Theorem to analyze factors of polynomials", "description": "Use the PRT (Polynomial Remainder Theorem) to determine the factors of polynomials and their remainders when divided by linear expressions.", "slug": "remainder-theorem-of-polynomials", "kind": "Exercise"}, {"path": "khan/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem/polynomial-remainder-theorem-proof/", "id": "NIazpCER9oM", "title": "Proof of the Polynomial Remainder Theorem", "kind": "Video", "description": "The PRT (Polynomial Remainder Theorem) may seem crazy to prove, but Sal shows how you can do it in less than six minutes!", "slug": "polynomial-remainder-theorem-proof"}], "in_knowledge_map": false, "description": "The polynomial remainder theorem allows us to easily determine whether a linear expression is a factor of a given polynomial. Learn exactly what the theorem means, practice using it, and learn about its proof.", "node_slug": "polynomial-remainder-theorem", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem", "extended_slug": "math/algebra2/arithmetic-with-polynomials/polynomial-remainder-theorem", "kind": "Topic", "slug": "polynomial-remainder-theorem"}], "in_knowledge_map": false, "description": "Learn how to add, subtract, multiply, and even divide polynomials.", "node_slug": "arithmetic-with-polynomials", "render_type": "Topic", "topic_page_url": "/math/algebra2/arithmetic-with-polynomials", "extended_slug": "math/algebra2/arithmetic-with-polynomials", "kind": "Topic", "slug": "arithmetic-with-polynomials"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/polynomial-and-rational/", "id": "polynomial-and-rational", "hide": false, "title": "Polynomial functions", "child_data": [{"kind": "Topic", "id": "xde14f7ad"}, {"kind": "Topic", "id": "xf3296847"}, {"kind": "Topic", "id": "x7a485029"}, {"kind": "Topic", "id": "xbd30a1b8"}, {"kind": "Topic", "id": "xa3adfa36"}, {"kind": "Topic", "id": "x5479c38d"}, {"kind": "Topic", "id": "x50066900"}, {"kind": "Topic", "id": "x8d0462d5"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/", "id": "quad_factoring", "hide": false, "title": "Factoring quadratics", "child_data": [{"kind": "Video", "id": "23710"}, {"kind": "Video", "id": "1228073357"}, {"kind": "Exercise", "id": "541466377"}, {"kind": "Video", "id": "26992"}, {"kind": "Video", "id": "26993"}, {"kind": "Exercise", "id": "3024"}, {"kind": "Video", "id": "13179580"}, {"kind": "Exercise", "id": "688726305"}, {"kind": "Exercise", "id": "541520116"}, {"kind": "Video", "id": "23712"}, {"kind": "Video", "id": "13179583"}, {"kind": "Exercise", "id": "541518385"}, {"kind": "Video", "id": "26991"}, {"kind": "Exercise", "id": "541433013"}, {"kind": "Video", "id": "x828e9a9a"}, {"kind": "Exercise", "id": "725546801"}, {"kind": "Video", "id": "26987"}, {"kind": "Video", "id": "26988"}, {"kind": "Exercise", "id": "729514670"}], "children": [{"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-quadratic-expressions/", "id": "eF6zYNzlZKQ", "title": "More examples of factoring quadratics with a leading coefficient of 1", "kind": "Video", "description": "Can't get enough of Sal factoring simple quadratics? Here's a handful of examples just for you!", "slug": "factoring-quadratic-expressions"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-polynomials-1/", "id": "1kfq0aR3ASs", "title": "How to factor quadratics with a leading coefficient of 1 (example)", "kind": "Video", "description": "Sal factors x^2-14x+40 as (x-4)(x-1) and x^2-x-12 as (x+3)(x-4).", "slug": "factoring-polynomials-1"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring_polynomials_1/", "id": "factoring_polynomials_1", "title": "Factor quadratics with a leading coefficient of 1", "description": "Use the \"sum-product\" form to factor quadratics of the form x^2+bx+c.", "slug": "factoring_polynomials_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/example-1-solving-a-quadratic-equation-by-factoring/", "id": "2ZzuZvz33X0", "title": "Solving a quadratic equation by factoring", "kind": "Video", "description": "U09_L2_T2_we1 Solving Quadratic Equations by Factoring.avi", "slug": "example-1-solving-a-quadratic-equation-by-factoring"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/example-2-solving-a-quadratic-equation-by-factoring/", "id": "04RpkdaNzr8", "title": "Recognizing a perfect square quadratic", "kind": "Video", "description": "U09_L2_T2_we2 Solving Quadratic Equations by Factoring 2.avi", "slug": "example-2-solving-a-quadratic-equation-by-factoring"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/solving_quadratics_by_factoring/", "id": "solving_quadratics_by_factoring", "title": "Solving quadratics by factoring", "description": "Factor quadratics to find the x-intercepts. Solve a polynomial by factoring.", "slug": "solving_quadratics_by_factoring", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-trinomials-with-a-common-factor/", "id": "GMoqg_s4Dl4", "title": "Example 1: Factoring trinomials with a common factor", "kind": "Video", "description": "Factoring trinomials with a common factor", "slug": "factoring-trinomials-with-a-common-factor"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring_polynomials_2/", "id": "factoring_polynomials_2", "title": "Factor polynomials using quadratic methods", "description": "Factor polynomials that can be factored as the product of a monomial and a quadratic expression, then further factor the quadratic expression.", "slug": "factoring_polynomials_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/solving_quadratics_by_factoring_2/", "id": "solving_quadratics_by_factoring_2", "title": "Solving quadratics by factoring 2", "description": "Solve quadratics by factoring, where the leading coefficient\u00a0is not 1", "slug": "solving_quadratics_by_factoring_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-special-products/", "id": "BI_jmI4xRus", "title": "Factoring special products", "kind": "Video", "description": "Factoring Special Products", "slug": "factoring-special-products"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-difference-of-squares/", "id": "tvnOWIoeeaU", "title": "How to factor a difference of squares with two variables (example)", "kind": "Video", "description": "Sal factors x^2-49y^2 as (x+7y)(x-7y).", "slug": "factoring-difference-of-squares"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring_difference_of_squares_1/", "id": "factoring_difference_of_squares_1", "title": "Factor simple special products", "description": "Factor quadratic expressions into the special products of the general forms (x+a)^2, (x-a)^2, and (x+a)(x-a).", "slug": "factoring_difference_of_squares_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/u09-l2-t1-we3-factoring-special-products-3/", "id": "YahJQvY396o", "title": "How to factor a difference of squares with two variables (example)", "kind": "Video", "description": "Sal factors 49x^2-49y^2 as (7x+7y)(7x-7y) or as 49(x+y)(x-y).", "slug": "u09-l2-t1-we3-factoring-special-products-3"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring_difference_of_squares_2/", "id": "factoring_difference_of_squares_2", "title": "Factor differences of squares", "description": "Factor quadratic expressions of the general difference of squares form: (ax)^2-b^2. The factored expressions have the general form (ax+b)(ax-b).", "slug": "factoring_difference_of_squares_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-to-produce-difference-of-squares/", "id": "jmbg-DKWuc4", "title": "How to factor a difference of squares with leading coefficient other than 1 (example)", "kind": "Video", "description": "Sal factors 45x^2-125 as 5(3x+5)(3x-5).", "slug": "factoring-to-produce-difference-of-squares"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring_difference_of_squares_3/", "id": "factoring_difference_of_squares_3", "title": "Factor polynomials with special product forms", "description": "Factor \"advanced\" polynomials (i.e. polynomials of various degrees and or with two variables) using special product factorization methods.", "slug": "factoring_difference_of_squares_3", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-trinomials-by-grouping-5/", "id": "R-rhSQzFJL0", "title": "How to factor quadratics by taking a common factor and grouping (example)", "kind": "Video", "description": "Sal factors 35k^2+100k-15 as 5(k+3)(7k-1).", "slug": "factoring-trinomials-by-grouping-5"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring-trinomials-by-grouping-6/", "id": "d-2Lcp0QKfI", "title": "How to factor quadratics by taking a negative common factor and grouping (example)", "kind": "Video", "description": "Sal factors -12f^2-38f+22 as -2(2f-1)(3f+11).", "slug": "factoring-trinomials-by-grouping-6"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_factoring/factoring_polynomials_by_grouping_1/", "id": "factoring_polynomials_by_grouping_1", "title": "Factor quadratics with a leading coefficient other than 1", "description": "Use the grouping method to factor quadratics of the form ax^2+bx+c.", "slug": "factoring_polynomials_by_grouping_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Just saying the word \"quadratic\" will make you feel smart and powerful. Try it. Imagine how smart and powerful you would actually be if you know what a quadratic is. Even better, imagine being able to completely dominate these \"quadratics\" with new found powers of factorization. Well, dream no longer.\n\nThis tutorial will be super fun. Just bring to it your equation solving skills, your ability to multiply binomials and a non-linear way of thinking!", "node_slug": "quad_factoring", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/polynomial-and-rational/quad_factoring", "extended_slug": "math/algebra2/polynomial-and-rational/quad_factoring", "kind": "Topic", "slug": "quad_factoring"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/", "id": "quad_formula_tutorial", "hide": false, "title": "Completing the square and the quadratic formula", "child_data": [{"kind": "Video", "id": "23720"}, {"kind": "Exercise", "id": "617819647"}, {"kind": "Video", "id": "23722"}, {"kind": "Exercise", "id": "369016246"}, {"kind": "Exercise", "id": "369017708"}, {"kind": "Video", "id": "23724"}, {"kind": "Video", "id": "23726"}, {"kind": "Exercise", "id": "2020"}, {"kind": "Video", "id": "150088081"}, {"kind": "Exercise", "id": "xb0219e75"}, {"kind": "Video", "id": "23728"}, {"kind": "Video", "id": "150009951"}, {"kind": "Exercise", "id": "957206558"}], "children": [{"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/solving-quadratic-equations-by-square-roots/", "id": "55G8037gsKY", "title": "Solving quadratic equations by square roots", "kind": "Video", "description": "Solving Quadratic Equations by Square Roots", "slug": "solving-quadratic-equations-by-square-roots"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/solving_quadratics_by_taking_the_square_root/", "id": "solving_quadratics_by_taking_the_square_root", "title": "Solving quadratics by taking the square root", "description": "Solve quadratics by taking the square root.", "slug": "solving_quadratics_by_taking_the_square_root", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/solving-quadratic-equations-by-completing-the-square/", "id": "bNQY0z76M5A", "title": "Solving quadratic equations by completing the square", "kind": "Video", "description": "Solving Quadratic Equations by Completing the Square", "slug": "solving-quadratic-equations-by-completing-the-square"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/completing_the_square_1/", "id": "completing_the_square_1", "title": "Solving quadratics by completing the square 1", "description": "Find the roots of a quadratic equation by completing the square.", "slug": "completing_the_square_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/completing_the_square_2/", "id": "completing_the_square_2", "title": "Solving quadratics by completing the square 2", "description": "Find the roots of a quadratic by completing the square. The numbers are a bit less convenient than they are in level 1.", "slug": "completing_the_square_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/using-the-quadratic-formula/", "id": "i7idZfS8t8w", "title": "How to use the quadratic formula", "kind": "Video", "description": "Introduction to using the quadratic formula.", "slug": "using-the-quadratic-formula"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/proof-of-quadratic-formula/", "id": "r3SEkdtpobo", "title": "Proof of quadratic formula", "kind": "Video", "description": "Proof of Quadratic Formula", "slug": "proof-of-quadratic-formula"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/quadratic_equation/", "id": "quadratic_equation", "title": "Using the quadratic formula", "description": "Use the quadratic formula to find the roots of a quadratic function.", "slug": "quadratic_equation", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/complex-roots-from-the-quadratic-formula/", "id": "dnjK4DPqh0k", "title": "Example: Complex roots for a quadratic", "kind": "Video", "description": "Complex Roots from the Quadratic Formula", "slug": "complex-roots-from-the-quadratic-formula"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/quadratic-formula-with-complex-solutions/", "id": "quadratic-formula-with-complex-solutions", "title": "Quadratic formula with complex solutions", "slug": "quadratic-formula-with-complex-solutions", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/discriminant-of-quadratic-equations/", "id": "JBSDQLZtjFo", "title": "Discriminant of quadratic equations", "kind": "Video", "description": "Discriminant of Quadratic Equations", "slug": "discriminant-of-quadratic-equations"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/discriminant-for-types-of-solutions-for-a-quadratic/", "id": "1213qW5k55I", "title": "Discriminant for types of solutions for a quadratic", "kind": "Video", "description": "Discriminant for Types of Solutions for a Quadratic", "slug": "discriminant-for-types-of-solutions-for-a-quadratic"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_formula_tutorial/solutions_to_quadratic_equations/", "id": "solutions_to_quadratic_equations", "title": "Solutions to quadratic equations", "description": "Determine how many solutions a quadratic equation has and whether they are rational, irrational, or complex", "slug": "solutions_to_quadratic_equations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You're already familiar with factoring quadratics, but have begun to realize that it only is useful in certain cases. Well, this tutorial will introduce you to something far more powerful and general. Even better, it is the bridge to understanding and proving the famous quadratic formula.\n\nWelcome to the world of completing the square!", "node_slug": "quad_formula_tutorial", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/polynomial-and-rational/quad_formula_tutorial", "extended_slug": "math/algebra2/polynomial-and-rational/quad_formula_tutorial", "kind": "Topic", "slug": "quad_formula_tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/polynomial-and-rational/quad_ineq/", "id": "quad_ineq", "hide": false, "title": "Quadratic inequalities", "child_data": [{"kind": "Video", "id": "23500"}, {"kind": "Video", "id": "23502"}], "children": [{"path": "khan/math/algebra2/polynomial-and-rational/quad_ineq/quadratic-inequalities/", "id": "ZNtzWpU80-0", "title": "Quadratic inequalities", "kind": "Video", "description": "Solving quadratic inequalities using factoring", "slug": "quadratic-inequalities"}, {"path": "khan/math/algebra2/polynomial-and-rational/quad_ineq/quadratic-inequalities-visual-explanation/", "id": "xdiBjypYFRQ", "title": "Quadratic inequalities (visual explanation)", "kind": "Video", "description": "How to solve a quadratic inequality. Visual intuition of what a quadratic inequality means.", "slug": "quadratic-inequalities-visual-explanation"}], "in_knowledge_map": false, "description": "You are familiar with factoring quadratic expressions and solving quadratic equations. Well, as you might guess, not everything in life has to be equal.\n\nIn this short tutorial we will look at quadratic inequalities.", "node_slug": "quad_ineq", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/polynomial-and-rational/quad_ineq", "extended_slug": "math/algebra2/polynomial-and-rational/quad_ineq", "kind": "Topic", "slug": "quad_ineq"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials/", "id": "factoring-higher-deg-polynomials", "hide": false, "title": "Factoring and roots of higher degree polynomials", "child_data": [{"kind": "Video", "id": "13179584"}, {"kind": "Video", "id": "466052139"}, {"kind": "Video", "id": "26990"}, {"kind": "Video", "id": "x2e519607"}, {"kind": "Video", "id": "x64e707f0"}, {"kind": "Exercise", "id": "xe4467456"}], "children": [{"path": "khan/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials/factoring-sum-of-cubes/", "id": "Touv2APcBRw", "title": "Factoring sum of cubes", "kind": "Video", "description": "Factoring Sum of Cubes", "slug": "factoring-sum-of-cubes"}, {"path": "khan/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials/difference-of-cubes-factoring/", "id": "CxcP4ylUP5w", "title": "Difference of cubes factoring", "kind": "Video", "description": "u12 l2 t3 we2 Difference of Cubes Factoring", "slug": "difference-of-cubes-factoring"}, {"path": "khan/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials/factoring-special-products-2/", "id": "o-ZbdYVGehI", "title": "How to factor a fourth degree polynomial using the \"perfect square\" form (example)", "kind": "Video", "description": "Sal factors 25x^4-30x^2+9 as (5x^2-3)^2.", "slug": "factoring-special-products-2"}, {"path": "khan/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials/factoring-5th-degree-polynomial-to-find-real-zeros/", "id": "mekBhhFWC9c", "title": "Factoring 5th degree polynomial to find real zeros", "kind": "Video", "slug": "factoring-5th-degree-polynomial-to-find-real-zeros"}, {"path": "khan/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials/identifying-graph-based-on-roots/", "id": "uFZvWYPfOmw", "title": "Identifying graph based on roots", "kind": "Video", "slug": "identifying-graph-based-on-roots"}, {"path": "khan/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials/using-zeros-to-graph-polynomials/", "id": "using-zeros-to-graph-polynomials", "title": "Using zeros to graph polynomials", "slug": "using-zeros-to-graph-polynomials", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Factoring quadratics are now second nature to you. Even when traditional factoring is difficult, you know about completing the square and the quadratic formula. Now you're ready for something more interesting. Well, as you'll see in this tutorial, factoring higher degree polynomials is definitely the challenge you're looking for!", "node_slug": "factoring-higher-deg-polynomials", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials", "extended_slug": "math/algebra2/polynomial-and-rational/factoring-higher-deg-polynomials", "kind": "Topic", "slug": "factoring-higher-deg-polynomials"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/polynomial-and-rational/polynomial-end-behavior/", "id": "polynomial-end-behavior", "hide": false, "title": "Polynomial graphs and end behavior", "child_data": [{"kind": "Video", "id": "xb79a4102"}, {"kind": "Video", "id": "x1666309b"}, {"kind": "Video", "id": "xcaf46e00"}, {"kind": "Video", "id": "xbc02ec48"}, {"kind": "Exercise", "id": "xebe449b2"}], "children": [{"path": "khan/math/algebra2/polynomial-and-rational/polynomial-end-behavior/polynomial-end-behavior/", "id": "tZKzaF28sOk", "title": "Polynomial end behavior", "kind": "Video", "slug": "polynomial-end-behavior"}, {"path": "khan/math/algebra2/polynomial-and-rational/polynomial-end-behavior/polynomial-end-behavior-example/", "id": "03Y76Q7tlSw", "title": "Polynomial end behavior example", "kind": "Video", "slug": "polynomial-end-behavior-example"}, {"path": "khan/math/algebra2/polynomial-and-rational/polynomial-end-behavior/another-polynomial-end-behavior-example/", "id": "FZXSc26Sajo", "title": "Another polynomial end behavior example", "kind": "Video", "slug": "another-polynomial-end-behavior-example"}, {"path": "khan/math/algebra2/polynomial-and-rational/polynomial-end-behavior/polynomial-end-behavior-exercise-example/", "id": "Yd2YBLQUCEc", "title": "Polynomial end behavior exercise example", "kind": "Video", "slug": "polynomial-end-behavior-exercise-example"}, {"path": "khan/math/algebra2/polynomial-and-rational/polynomial-end-behavior/graphs-of-polynomials/", "id": "graphs-of-polynomials", "title": "Graphs of polynomials", "slug": "graphs-of-polynomials", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we will study the behavior of polynomials and their graphs. In particular, we'll look at which forms of a polynomial are best for determining various aspects of its graph.", "node_slug": "polynomial-end-behavior", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/polynomial-and-rational/polynomial-end-behavior", "extended_slug": "math/algebra2/polynomial-and-rational/polynomial-end-behavior", "kind": "Topic", "slug": "polynomial-end-behavior"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/", "id": "binomial_theorem", "hide": false, "title": "Binomial theorem", "child_data": [{"kind": "Video", "id": "x143f944b"}, {"kind": "Video", "id": "x87dcb8c9"}, {"kind": "Video", "id": "x69d9ce4e"}, {"kind": "Exercise", "id": "xa4ecc757"}, {"kind": "Video", "id": "x5fbb948e"}, {"kind": "Video", "id": "x18e9abfd"}, {"kind": "Video", "id": "x10480fb9"}, {"kind": "Video", "id": "25810"}], "children": [{"path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/binomial-theorem/", "id": "iPwrDWQ7hPc", "title": "Binomial theorem", "kind": "Video", "slug": "binomial-theorem"}, {"path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/pascals-triangle-binomial-theorem/", "id": "v9Evg2tBdRk", "title": "Pascal's triangle for binomial expansion", "kind": "Video", "slug": "pascals-triangle-binomial-theorem"}, {"path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/coefficient-in-binomial-expansion/", "id": "ojFuf9RYmzI", "title": "Determining coefficient in binomial expansion", "kind": "Video", "slug": "coefficient-in-binomial-expansion"}, {"path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/binomial-theorem_1/", "id": "binomial-theorem", "title": "Binomial theorem", "slug": "binomial-theorem_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/binomial-theorem-and-combinatorics-intuition/", "id": "_hrN4rVCOfI", "title": "Intuitive connection between binomial expansion and combinatorics", "kind": "Video", "slug": "binomial-theorem-and-combinatorics-intuition"}, {"path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/binomial-theorem-intuition/", "id": "x-N76NrMDNE", "title": "Connecting Pascal's triangle to binomial combinatorics", "kind": "Video", "slug": "binomial-theorem-intuition"}, {"path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/binomial-expansion-algorithm/", "id": "2IFItASxDVo", "title": "Algorithm for mentally computing binomial expansion coefficients", "kind": "Video", "slug": "binomial-expansion-algorithm"}, {"path": "khan/math/algebra2/polynomial-and-rational/binomial_theorem/binomial-theorem-part-3/", "id": "xF_hJaXUNfE", "title": "Binomial theorem combinatorics connection", "kind": "Video", "description": "Intuition behind why binomial expansion involves combinatorics", "slug": "binomial-theorem-part-3"}], "in_knowledge_map": false, "description": "You can keep taking the powers of a binomial by hand, but, as we'll see in this tutorial, there is a much more elegant way to do it using the binomial theorem and/or Pascal's Triangle.", "node_slug": "binomial_theorem", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/polynomial-and-rational/binomial_theorem", "extended_slug": "math/algebra2/polynomial-and-rational/binomial_theorem", "kind": "Topic", "slug": "binomial_theorem"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/polynomial-and-rational/advanced-structure-in-expression/", "id": "advanced-structure-in-expression", "hide": false, "title": "Advanced structure in expressions", "child_data": [{"kind": "Video", "id": "x9a692344"}, {"kind": "Video", "id": "x7de74d32"}, {"kind": "Exercise", "id": "xfb360bcf"}], "children": [{"path": "khan/math/algebra2/polynomial-and-rational/advanced-structure-in-expression/structure-in-rational-expression/", "id": "mNgW6SAQLhk", "title": "Structure in rational expression", "kind": "Video", "slug": "structure-in-rational-expression"}, {"path": "khan/math/algebra2/polynomial-and-rational/advanced-structure-in-expression/structure-in-exponential-expression/", "id": "gR8-vRg6Yp0", "title": "Structure in exponential expression", "kind": "Video", "slug": "structure-in-exponential-expression"}, {"path": "khan/math/algebra2/polynomial-and-rational/advanced-structure-in-expression/advanced-structure-in-expressions/", "id": "advanced-structure-in-expressions", "title": "Advanced structure in expressions", "slug": "advanced-structure-in-expressions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial is all about *really* being able to interpret and see meaning in algebraic expressions--including those that involve rational expressions, exponentials, and polynomials. If you enjoy these ideas and problems, then you're really begun to develop your mathematical maturity.", "node_slug": "advanced-structure-in-expression", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/polynomial-and-rational/advanced-structure-in-expression", "extended_slug": "math/algebra2/polynomial-and-rational/advanced-structure-in-expression", "kind": "Topic", "slug": "advanced-structure-in-expression"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/polynomial-and-rational/fundamental-theorem-of-algebra/", "id": "fundamental-theorem-of-algebra", "hide": false, "title": "Fundamental Theorem of Algebra", "child_data": [{"kind": "Video", "id": "xd72bdb29"}, {"kind": "Video", "id": "x6d4fe289"}, {"kind": "Video", "id": "xf74e2e33"}, {"kind": "Exercise", "id": "x4a74cef0"}], "children": [{"path": "khan/math/algebra2/polynomial-and-rational/fundamental-theorem-of-algebra/fundamental-theorem-of-algebra-intro/", "id": "d8-LO6FCna0", "title": "Fundamental theorem of algebra", "kind": "Video", "slug": "fundamental-theorem-of-algebra-intro"}, {"path": "khan/math/algebra2/polynomial-and-rational/fundamental-theorem-of-algebra/fundamental-theorem-algebra-quadratic/", "id": "zNxEVaRbdus", "title": "Fundamental theorem of algebra for quadratic", "kind": "Video", "slug": "fundamental-theorem-algebra-quadratic"}, {"path": "khan/math/algebra2/polynomial-and-rational/fundamental-theorem-of-algebra/possible-real-roots/", "id": "_HFTRQRpzFM", "title": "Possible number of real roots", "kind": "Video", "slug": "possible-real-roots"}, {"path": "khan/math/algebra2/polynomial-and-rational/fundamental-theorem-of-algebra/the-fundamental-theorem-of-algebra/", "id": "the-fundamental-theorem-of-algebra", "title": "The fundamental theorem of algebra", "slug": "the-fundamental-theorem-of-algebra", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial will better connect the world of complex numbers to roots of polynomials. It will show us that when we couldn't find roots, we just weren't looking hard enough. In particular, the Fundamental Theorem of Algebra tells us that every non-zero polynomial in one-variable of degree n has exactly n-roots (although they might not all be real!)", "node_slug": "fundamental-theorem-of-algebra", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/polynomial-and-rational/fundamental-theorem-of-algebra", "extended_slug": "math/algebra2/polynomial-and-rational/fundamental-theorem-of-algebra", "kind": "Topic", "slug": "fundamental-theorem-of-algebra"}], "in_knowledge_map": false, "description": "Exploring quadratics and higher degree polynomials. Also in-depth look at rational functions.", "node_slug": "polynomial-and-rational", "render_type": "Topic", "topic_page_url": "/math/algebra2/polynomial-and-rational", "extended_slug": "math/algebra2/polynomial-and-rational", "kind": "Topic", "slug": "polynomial-and-rational"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/radical-equations-and-functions/", "id": "radical-equations-and-functions", "hide": false, "title": "Radical equations and functions", "child_data": [{"kind": "Topic", "id": "x58f1355a"}, {"kind": "Topic", "id": "x04ae5f77"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/", "id": "radical-equations", "hide": false, "title": "Radical equations", "child_data": [{"kind": "Video", "id": "127771048"}, {"kind": "Video", "id": "23748"}, {"kind": "Video", "id": "26907"}, {"kind": "Video", "id": "26908"}, {"kind": "Video", "id": "26909"}, {"kind": "Video", "id": "26910"}, {"kind": "Video", "id": "26911"}, {"kind": "Video", "id": "26912"}, {"kind": "Exercise", "id": "23890543"}, {"kind": "Exercise", "id": "xb411e476"}], "children": [{"path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/solving-radical-equations/", "id": "pFFoAGIEyJc", "title": "Solving radical equations", "kind": "Video", "description": "Solving Radical Equations", "slug": "solving-radical-equations"}, {"path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/extraneous-solutions-to-radical-equations/", "id": "711pdW8TbbY", "title": "Extraneous solutions to radical equations", "kind": "Video", "description": "Extraneous Solutions to Radical Equations", "slug": "extraneous-solutions-to-radical-equations"}, {"path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/solving-radical-equations-1/", "id": "y4C81qAa3pY", "title": "Solving radical equations 1", "kind": "Video", "description": "Solving Radical Equations 1", "slug": "solving-radical-equations-1"}, {"path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/solving-radical-equations-2/", "id": "b6WtwQddAcY", "title": "Solving radical equations 2", "kind": "Video", "description": "Solving Radical Equations 2", "slug": "solving-radical-equations-2"}, {"path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/solving-radical-equations-3/", "id": "g6nGcnVB8BM", "title": "Solving radical equations 3", "kind": "Video", "description": "Solving Radical Equations 3", "slug": "solving-radical-equations-3"}, {"path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/applying-radical-equations-1/", "id": "U3JxFFdKCKM", "title": "Applying radical equations 1", "kind": "Video", "description": "Applying Radical Equations 1", "slug": "applying-radical-equations-1"}, {"path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/applying-radical-equations-2/", "id": "YghRP8S2K-4", "title": "Applying radical equations 2", "kind": "Video", "description": "Applying Radical Equations 2", "slug": "applying-radical-equations-2"}, {"path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/applying-radical-equations-3/", "id": "npUtXLjTnxg", "title": "Applying radical equations 3", "kind": "Video", "description": "Applying Radical Equations 3", "slug": "applying-radical-equations-3"}, {"path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/radical_equations/", "id": "radical_equations", "title": "Radical equations", "description": "Solve equations containing square roots of variables.", "slug": "radical_equations", "kind": "Exercise"}, {"path": "khan/math/algebra2/radical-equations-and-functions/radical-equations/extraneous-solutions-to-radical-equations_1/", "id": "extraneous-solutions-to-radical-equations", "title": "Extraneous solutions to radical equations", "slug": "extraneous-solutions-to-radical-equations_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial you will solve radical equations.", "node_slug": "radical-equations", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/radical-equations-and-functions/radical-equations", "extended_slug": "math/algebra2/radical-equations-and-functions/radical-equations", "kind": "Topic", "slug": "radical-equations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/", "id": "shifting-reflecting-functions", "hide": false, "title": "Shifting and reflecting functions", "child_data": [{"kind": "Video", "id": "xb05fec98"}, {"kind": "Video", "id": "23740"}, {"kind": "Exercise", "id": "3813824"}, {"kind": "Video", "id": "x463eded6"}, {"kind": "Video", "id": "xdec5fd1e"}, {"kind": "Video", "id": "xc7be7cc7"}, {"kind": "Exercise", "id": "x3528cdfc"}], "children": [{"path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/shifting-and-reflecting-functions/", "id": "ENFNyNPYfZU", "title": "Shifting and reflecting functions", "kind": "Video", "description": "Sal walks through several examples of how to write g(x) implicitly in terms of f(x) when g(x) is a shift or a reflection of f(x).", "slug": "shifting-and-reflecting-functions"}, {"path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/graphs-of-square-root-functions/", "id": "outcfkh69U0", "title": "Shifting and stretching functions", "kind": "Video", "description": "Sal graphs y=\u221ax. Then, he shows a few examples of how we can shift and stretch the graphs of y=\u221ax and y=x^2, and how the equations of those graphs look.", "slug": "graphs-of-square-root-functions"}, {"path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/shifting_and_reflecting_functions/", "id": "shifting_and_reflecting_functions", "title": "Summary: Transforming functions", "description": "Given the graphs of functions f and g where g is a transformation of f, determine the formula of g in terms of f.", "slug": "shifting_and_reflecting_functions", "kind": "Exercise"}, {"path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/flipping-shifting-radical-functions/", "id": "t5ry2rasWvI", "title": "Flipping and shifting radical functions", "kind": "Video", "slug": "flipping-shifting-radical-functions"}, {"path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/radical-functions-equations/", "id": "9UBZchwb2KI", "title": "Equations for radical functions example", "kind": "Video", "slug": "radical-functions-equations"}, {"path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/radical-function-graphs-exercise/", "id": "Uteoh0PtWwI", "title": "Matching radical functions with graphs exercise example", "kind": "Video", "slug": "radical-function-graphs-exercise"}, {"path": "khan/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions/graphs-of-radical-functions/", "id": "graphs-of-radical-functions", "title": "Graphs of square root functions", "slug": "graphs-of-radical-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "shifting-reflecting-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/radical-equations-and-functions/shifting-reflecting-functions", "extended_slug": "math/algebra2/radical-equations-and-functions/shifting-reflecting-functions", "kind": "Topic", "slug": "shifting-reflecting-functions"}], "in_knowledge_map": false, "description": "In this topic you will learn how to solve radical equations (which are equations with radical expressions in them) while avoiding extraneous solutions. You will also learn how to graph radical functions and about the inverse relationship between polynomial and radical functions.", "node_slug": "radical-equations-and-functions", "render_type": "Topic", "topic_page_url": "/math/algebra2/radical-equations-and-functions", "extended_slug": "math/algebra2/radical-equations-and-functions", "kind": "Topic", "slug": "radical-equations-and-functions"}, {"icon_src": "/images/power-mode/badges/rates-and-ratios-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/rational-expressions-equations-and-functions/", "id": "rational-expressions-equations-and-functions", "hide": false, "title": "Rational expressions, equations, and functions", "child_data": [{"kind": "Topic", "id": "x1001e778"}, {"kind": "Topic", "id": "xca4b5890"}, {"kind": "Topic", "id": "xafd22e81"}, {"kind": "Topic", "id": "x6340bb2e"}, {"kind": "Topic", "id": "x53bcca90"}, {"kind": "Topic", "id": "x8ff2eea0"}, {"kind": "Topic", "id": "xe51806b0"}, {"kind": "Topic", "id": "x8b41e49f"}, {"kind": "Topic", "id": "xb853c3ea"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/", "id": "simplify-rational-expressions", "hide": false, "title": "Simplifying rational expressions", "child_data": [{"kind": "Video", "id": "23782"}, {"kind": "Video", "id": "13179522"}, {"kind": "Exercise", "id": "1383549742"}, {"kind": "Video", "id": "8187340"}, {"kind": "Video", "id": "27013"}, {"kind": "Exercise", "id": "1439997121"}, {"kind": "Video", "id": "27012"}, {"kind": "Exercise", "id": "1439634833"}], "children": [{"path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/simplifying-rational-expressions-introduction/", "id": "7Uos1ED3KHI", "title": "Introduction to simplifying rational expressions", "kind": "Video", "description": "Sal explains what it means to simplify a rational expression and why we would want to do that. Just don't forget the excluded values!", "slug": "simplifying-rational-expressions-introduction"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/dividing-monomials/", "id": "4Eax48gDg9g", "title": "How to simplify a rational expression by canceling common monomial terms (example)", "kind": "Video", "description": "Sal simplifies (28b^6)/(7b) as 4b^5.", "slug": "dividing-monomials"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/simplifying_rational_expressions_1/", "id": "simplifying_rational_expressions_1", "title": "Simplify rational expressions by canceling monomial factors", "description": "Factor the numerator and the denominator of a rational expression and cancel out common monomial terms.", "slug": "simplifying_rational_expressions_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/simplifying-rational-expressions-1/", "id": "XChok8XlF90", "title": "How to simplify a rational expression by canceling binomial factors (example)", "kind": "Video", "description": "Sal solves the following problem:\u00a0Given a rectangle with length a^2+6a+27 and width a^2-9, write the ratio of the width to the length as a simplified rational expression.", "slug": "simplifying-rational-expressions-1"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/simplifying-rational-expressions-3/", "id": "ey_b3aPsRl8", "title": "How to simplify a rational expression by canceling factors with opposite signs (example)", "kind": "Video", "description": "Sal\u00a0simplifies and states the domain of (x^2-36)/(6-x).", "slug": "simplifying-rational-expressions-3"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/simplifying_rational_expressions_2/", "id": "simplifying_rational_expressions_2", "title": "Simplify rational expressions by canceling binomial factors", "description": "Factor the numerator and the denominator of a rational expression and cancel out common binomial terms.", "slug": "simplifying_rational_expressions_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/simplifying-rational-expressions-2/", "id": "dstNU7It-Ro", "title": "How to simplify a rational expressions using advanced factorization methods (example)", "kind": "Video", "description": "Sal\u00a0simplifies and states the domain of (2x^2+13x+20)/(2x^2+17x+30).", "slug": "simplifying-rational-expressions-2"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions/simplifying_rational_expressions_3/", "id": "simplifying_rational_expressions_3", "title": "Simplify rational expressions using advanced factorization methods", "description": "Factor the numerator and the denominator of a rational expression using advanced methods, and cancel out common terms.", "slug": "simplifying_rational_expressions_3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to simplify rational expressions by canceling factors that are shared by the numerator and the denominator. Sometimes this calls for factoring the numerator and the denominator in various ways.", "node_slug": "simplify-rational-expressions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions", "extended_slug": "math/algebra2/rational-expressions-equations-and-functions/simplify-rational-expressions", "kind": "Topic", "slug": "simplify-rational-expressions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions/", "id": "multiplying-and-dividing-rational-expressions", "hide": false, "title": "Multiplying and dividing rational expressions", "child_data": [{"kind": "Exercise", "id": "xab9b59a7"}, {"kind": "Video", "id": "27015"}, {"kind": "Video", "id": "27016"}, {"kind": "Exercise", "id": "x47b9a454"}, {"kind": "Video", "id": "27014"}, {"kind": "Exercise", "id": "x1988fae7"}], "children": [{"path": "khan/math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions/multiplying_and_dividing_rational_expressions_1/", "id": "multiplying_and_dividing_rational_expressions_1", "title": "Multiply and divide rational expressions with monomial numerators and denominators", "description": "Multiply or divide rational expressions whose numerators and denominators are monomials, and simplify the result.", "slug": "multiplying_and_dividing_rational_expressions_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions/multiplying-and-dividing-rational-expressions-2/", "id": "f-wz_ZzSDdg", "title": "How to multiply rational expressions with polynomial numerators and denominators (example)", "kind": "Video", "description": "Sal performs the following multiplication and simplifies the result: (a^2-4)/(a^2-1) X (a+1)/(a+2).", "slug": "multiplying-and-dividing-rational-expressions-2"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions/multiplying-and-dividing-rational-expressions-3/", "id": "gcnk8TnzsLc", "title": "How to divide rational expressions with polynomial numerators and denominators (example)", "kind": "Video", "description": "Sal performs the following division and simplifies the result: (2p+6)/(p+5) \u2797 (10)/(4p+20).", "slug": "multiplying-and-dividing-rational-expressions-3"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions/multiplying_and_dividing_rational_expressions_2/", "id": "multiplying_and_dividing_rational_expressions_2", "title": "Multiply and divide rational expressions with polynomial numerators and denominators", "description": "Multiply or divide rational expressions whose numerators and denominators are polynomials, and simplify the result.", "slug": "multiplying_and_dividing_rational_expressions_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions/multiplying-and-dividing-rational-expressions-1/", "id": "3GL69IA2q4s", "title": "How to multiply rational expressions with multiple variables (example)", "kind": "Video", "description": "Sal performs the following multiplication and simplifies the result: (3x^2y)/(2ab) X (14a^2b)/(18xy^2).", "slug": "multiplying-and-dividing-rational-expressions-1"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions/multiplying_and_dividing_rational_expressions_3/", "id": "multiplying_and_dividing_rational_expressions_3", "title": "Multiply and divide advanced rational expressions", "description": "Multiply or divide rational expressions whose numerators and denominators are high-order polynomials, or two-variable polynomials, and simplify the result.", "slug": "multiplying_and_dividing_rational_expressions_3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to multiply and divide rational expressions. You will be surprised to see how similar it is to multiplying and dividing fractions!", "node_slug": "multiplying-and-dividing-rational-expressions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions", "extended_slug": "math/algebra2/rational-expressions-equations-and-functions/multiplying-and-dividing-rational-expressions", "kind": "Topic", "slug": "multiplying-and-dividing-rational-expressions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/", "id": "adding-and-subtracting-rational-expressions", "hide": false, "title": "Adding and subtracting rational expressions", "child_data": [{"kind": "Exercise", "id": "xd387e694"}, {"kind": "Exercise", "id": "x943cdb91"}, {"kind": "Video", "id": "x19e7b12a"}, {"kind": "Video", "id": "xafe97682"}, {"kind": "Exercise", "id": "2019"}, {"kind": "Exercise", "id": "xc29f759e"}, {"kind": "Video", "id": "27019"}, {"kind": "Exercise", "id": "x3c375143"}], "children": [{"path": "khan/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/adding_and_subtracting_rational_expressions/", "id": "adding_and_subtracting_rational_expressions", "title": "Add and subtract rational expressions with the same denominator", "description": "Ease into the realm of rational-expression-addition-and-subtraction by first working with expressions that have the same denominator.", "slug": "adding_and_subtracting_rational_expressions", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/adding_and_subtracting_rational_expressions_2/", "id": "adding_and_subtracting_rational_expressions_2", "title": "Add and subtract rational expressions with relatively prime denominators", "description": "Add and subtract rational expressions with relatively prime denominators by manipulating them to have the same denominators.", "slug": "adding_and_subtracting_rational_expressions_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/least-common-multiple-exercise/", "id": "znmPfDfsir8", "title": "How to find the least common multiple of two numbers (example)", "kind": "Video", "description": "Sal finds the lcm (least common multiple) of 12 and 36, and of 12 and 18. He shows how to do that using the prime factorization method, which is a just great!", "slug": "least-common-multiple-exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/least-common-multiple-exercise-2/", "id": "QUem_2dkB9I", "title": "How to find the least common multiple of two numbers with repeating factors (example)", "kind": "Video", "description": "Sal finds the lcm (least common multiple) of 25 and 30.", "slug": "least-common-multiple-exercise-2"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/least_common_multiple/", "id": "least_common_multiple", "title": "Least common multiple", "description": "Find the lcm (least common multiple) of pairs of integers.", "slug": "least_common_multiple", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/adding_and_subtracting_rational_expressions_3/", "id": "adding_and_subtracting_rational_expressions_3", "title": "Add and subtract rational expressions with factored denominators", "description": "Add and subtract rational expressions with factored denominators by manipulating them to have the same denominators.", "slug": "adding_and_subtracting_rational_expressions_3", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/adding-and-subtracting-rational-expressions-3/", "id": "IKsi-DQU2zo", "title": "How to subtract rational expressions by finding the least common multiple (example)", "kind": "Video", "description": "Sal performs the following subtraction and simplifies the result: (a-2)/(a+2) - (a-3)/(a^2+4a+4).", "slug": "adding-and-subtracting-rational-expressions-3"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/adding_and_subtracting_rational_expressions_5/", "id": "adding_and_subtracting_rational_expressions_5", "title": "Add and subtract rational expressions by finding the least common multiple", "description": "Master the skill of rational-expression-addition-and-subtraction by working with expressions whose denominators aren't factored and may or may not have shared factors.", "slug": "adding_and_subtracting_rational_expressions_5", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to add and subtract rational expressions. Like multiplication and division, this skill has a remarkable affinity to adding and subtracting fractions!", "node_slug": "adding-and-subtracting-rational-expressions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions", "extended_slug": "math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions", "kind": "Topic", "slug": "adding-and-subtracting-rational-expressions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/", "id": "solving-rational-equations", "hide": false, "title": "Solving rational equations", "child_data": [{"kind": "Video", "id": "1242890488"}, {"kind": "Exercise", "id": "3013"}, {"kind": "Video", "id": "27022"}, {"kind": "Exercise", "id": "x225e3ab6"}, {"kind": "Video", "id": "124291561"}, {"kind": "Video", "id": "27021"}, {"kind": "Video", "id": "124291568"}, {"kind": "Exercise", "id": "x188ce910"}], "children": [{"path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/ex-1-multi-step-equation/", "id": "PPvd4X3Wv5I", "title": "How to solve an equation with one rational expression (example)", "kind": "Video", "description": "Sal solves the equation (14x+4)/(-3x-2)=8.", "slug": "ex-1-multi-step-equation"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/linear_equations_4/", "id": "linear_equations_4", "title": "Solve equations with one rational expression (basic)", "description": "Solve equations that have one rational expression whose numerator and denominator and linear expressions.", "slug": "linear_equations_4", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/solving-rational-equations-3/", "id": "5wUJLMWZ5Fw", "title": "How to solve an equation with a rational expression that needs simplification (example)", "kind": "Video", "description": "Sal solves the following equation by first simplifying the rational expression: x^2-(x^2-4)/(x-2)=4.", "slug": "solving-rational-equations-3"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/solving_rational_equations_2/", "id": "solving_rational_equations_2", "title": "Solve equations with one rational expression (advanced)", "description": "Solve equations that have one rational expression whose numerator and denominator are polynomial expressions.", "slug": "solving_rational_equations_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/rational-equations/", "id": "bRwJ-QCz9XU", "title": "How to solve an equation with two rational expressions (example)", "kind": "Video", "description": "Sal solves the equation 4/(p-1)=5/(p+3).", "slug": "rational-equations"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/solving-rational-equations-2/", "id": "RdYA8ZpqdJE", "title": "How to solve an equation with two rational expressions incl. finding LCM (example)", "kind": "Video", "description": "Sal solves the equation 5/(2x)-4/(3x)=7/18 by first finding the LCM (least common multiple) of 2x and 3x.", "slug": "solving-rational-equations-2"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/extraneous-solutions-to-rational-equations/", "id": "bml74_PsfwA", "title": "How to solve a rational equation with an extraneous solution (example)", "kind": "Video", "description": "Sal solves the following equation and eliminates the resulting extraneous solution: (x^2)/(x+2)=4/(x+2).", "slug": "extraneous-solutions-to-rational-equations"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations/rational-equations-3/", "id": "rational-equations-3", "title": "Solve equations with two rational expressions", "description": "Solve advanced rational equations with multiple expressions.", "slug": "rational-equations-3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to solve equations that have a rational expression, or a few of those.", "node_slug": "solving-rational-equations", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations", "extended_slug": "math/algebra2/rational-expressions-equations-and-functions/solving-rational-equations", "kind": "Topic", "slug": "solving-rational-equations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation/", "id": "direct-and-inverse-variation", "hide": false, "title": "Direct and inverse variation", "child_data": [{"kind": "Video", "id": "62754976"}, {"kind": "Video", "id": "62754977"}, {"kind": "Exercise", "id": "23890555"}, {"kind": "Video", "id": "124291559"}, {"kind": "Video", "id": "124291567"}], "children": [{"path": "khan/math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation/direct-and-inverse-variation/", "id": "92U67CUy9Gc", "title": "Introduction to direct and inverse variation", "kind": "Video", "description": "Sal explains what it means for quantities to vary directly or inversely, and gives many examples of both types of variation.", "slug": "direct-and-inverse-variation"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation/recognizing-direct-and-inverse-variation/", "id": "3_DxJwDTbyQ", "title": "How to determine whether an equation represents direct or inverse variation (example)", "kind": "Video", "description": "Sal gives many examples of two-variable equations where the variables vary directly, inversely, or neither.", "slug": "recognizing-direct-and-inverse-variation"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation/direct_and_inverse_variation/", "id": "direct_and_inverse_variation", "title": "Distinguish between direct and inverse variation", "description": "Given a few two-variable equations, find those that show direct or inverse variation.", "slug": "direct_and_inverse_variation", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation/direct-inverse-and-joint-variation/", "id": "v-k5L0BPOmc", "title": "How to determine whether a table of values represents direct or inverse variation (example)", "kind": "Video", "description": "Sal is given a table with a few values of the variables x and y, and determines whether the variables vary directly or inversely.", "slug": "direct-inverse-and-joint-variation"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation/inverse-variation-application/", "id": "lkP-E2LUnjA", "title": "How to solve a word problem with inverse variation (example)", "kind": "Video", "description": "Sal solves a word problem about lengths of strings and the frequency of their vibrations!", "slug": "inverse-variation-application"}], "in_knowledge_map": false, "description": "Learn about direct and inverse variation, which are two types of relationships between two quantities. Direct variation is simply a proportional relationship, but inverse variation is more complicated and interesting. Gain some experience with it before we dive deeper into the world of rational functions.", "node_slug": "direct-and-inverse-variation", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation", "extended_slug": "math/algebra2/rational-expressions-equations-and-functions/direct-and-inverse-variation", "kind": "Topic", "slug": "direct-and-inverse-variation"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/rational-expressions-equations-and-functions/end-behavior-of-rational-functions/", "id": "end-behavior-of-rational-functions", "hide": false, "title": "End behavior of rational functions", "child_data": [{"kind": "Video", "id": "x0149f708"}, {"kind": "Exercise", "id": "x03382f50"}], "children": [{"path": "khan/math/algebra2/rational-expressions-equations-and-functions/end-behavior-of-rational-functions/finding-asymptotes-example/", "id": "P0ZgqB44Do4", "title": "Analyzing end behavior and discontinuities of rational functions", "kind": "Video", "description": "Sal analyzes the function f(x)=(3x^2-18x-81)/(6x^2-54) and determines its horizontal asymptotes, vertical asymptotes, and removable discontinuities.", "slug": "finding-asymptotes-example"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/end-behavior-of-rational-functions/end-behavior-of-rational-functions/", "id": "end-behavior-of-rational-functions", "title": "Determine the end behavior of rational functions", "description": "Given a rational function, determine how it behaves as x approaches +\u221e or -\u221e.", "slug": "end-behavior-of-rational-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn about the ways in which rational functions behave as x approaches positive or negative infinity. This gets interesting Learn how to determine this behavior for any kind of rational function.", "node_slug": "end-behavior-of-rational-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/rational-expressions-equations-and-functions/end-behavior-of-rational-functions", "extended_slug": "math/algebra2/rational-expressions-equations-and-functions/end-behavior-of-rational-functions", "kind": "Topic", "slug": "end-behavior-of-rational-functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/rational-expressions-equations-and-functions/discontinuities-of-rational-functions/", "id": "discontinuities-of-rational-functions", "hide": false, "title": "Discontinuities of rational functions", "child_data": [{"kind": "Video", "id": "x0149f708"}, {"kind": "Exercise", "id": "xa81bf086"}], "children": [{"path": "khan/math/algebra2/rational-expressions-equations-and-functions/discontinuities-of-rational-functions/finding-asymptotes-example/", "id": "P0ZgqB44Do4", "title": "Analyzing end behavior and discontinuities of rational functions", "kind": "Video", "description": "Sal analyzes the function f(x)=(3x^2-18x-81)/(6x^2-54) and determines its horizontal asymptotes, vertical asymptotes, and removable discontinuities.", "slug": "finding-asymptotes-example"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/discontinuities-of-rational-functions/analyze-vertical-asymptotes-of-rational-functions/", "id": "analyze-vertical-asymptotes-of-rational-functions", "title": "Identify and analyze discontinuities of rational functions", "description": "Distinguish between vertical asymptotes and removable discontinuities, and analyze a function's behavior around its vertical asymptotes.", "slug": "analyze-vertical-asymptotes-of-rational-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn about the ways in which rational functions behave when their denominator is equal to zero. This gets interesting when vertical asymptotes are involved! Learn how to determine this behavior for any kind of rational function.", "node_slug": "discontinuities-of-rational-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/rational-expressions-equations-and-functions/discontinuities-of-rational-functions", "extended_slug": "math/algebra2/rational-expressions-equations-and-functions/discontinuities-of-rational-functions", "kind": "Topic", "slug": "discontinuities-of-rational-functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/", "id": "graphs-of-rational-functions", "hide": false, "title": "Graphs of rational functions", "child_data": [{"kind": "Video", "id": "x6d96b6fe"}, {"kind": "Exercise", "id": "x0cf0a67f"}, {"kind": "Video", "id": "xc5653fa0"}, {"kind": "Video", "id": "23776"}, {"kind": "Video", "id": "23774"}, {"kind": "Video", "id": "23778"}], "children": [{"path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/example-rational-functions-graphs/", "id": "onmNaDrxwmo", "title": "How to match a graph of a rational function to its formula (example)", "kind": "Video", "description": "Sal matches three graphs of rational functions to three formulas of such functions by considering asymptotes and intercepts.", "slug": "example-rational-functions-graphs"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/graphs-of-rational-functions/", "id": "graphs-of-rational-functions", "title": "Match graphs of rational functions to their formula", "description": "Determine which of four graphs fits the formula of a given function.", "slug": "graphs-of-rational-functions", "kind": "Exercise"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/horizontal-vertical-asymptotes/", "id": "fvC0dm2wzIo", "title": "How to graph a rational function (example)", "kind": "Video", "description": "Sal graphs f(x)=(2x+10)/(5x-15).", "slug": "horizontal-vertical-asymptotes"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/another-rational-function-graph-example/", "id": "ReEMqdZEEX0", "title": "How to graph a rational function (example)", "kind": "Video", "description": "Sal graphs y=(2x)/(x+1).", "slug": "another-rational-function-graph-example"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/asymptotes-of-rational-functions/", "id": "2N62v_63SBo", "title": "How to graph a rational function (example)", "kind": "Video", "description": "Sal graphs y=(x^2)/(x^2-16).", "slug": "asymptotes-of-rational-functions"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions/a-third-example-of-graphing-a-rational-function/", "id": "p7ycTWq6BFk", "title": "How to graph a rational function (example)", "kind": "Video", "description": "Sal graphs y=(x)/(x^2-x-6).", "slug": "a-third-example-of-graphing-a-rational-function"}], "in_knowledge_map": false, "description": "Combine your knowledge of intercepts, horizontal asymptotes, vertical asymptotes, and removable discontinuities, in order to analyze entire graphs of rational functions!", "node_slug": "graphs-of-rational-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions", "extended_slug": "math/algebra2/rational-expressions-equations-and-functions/graphs-of-rational-functions", "kind": "Topic", "slug": "graphs-of-rational-functions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/rational-expressions-equations-and-functions/modeling-with-rational-functions/", "id": "modeling-with-rational-functions", "hide": false, "title": "Modeling with rational functions", "child_data": [{"kind": "Video", "id": "8187347"}, {"kind": "Video", "id": "27075"}, {"kind": "Video", "id": "27076"}], "children": [{"path": "khan/math/algebra2/rational-expressions-equations-and-functions/modeling-with-rational-functions/applying-rational-equations-1/", "id": "gD7A1LA4jO8", "title": "How to solve combined rates word problem with rational equations (example)", "kind": "Video", "description": "Sal solves a word problem about the combined leaf-bagging rates of Ian and Kyandre, by creating a rational equation that models the situation.", "slug": "applying-rational-equations-1"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/modeling-with-rational-functions/applying-rational-equations-2/", "id": "E1j8W64NQ0Y", "title": "How to solve combined rates word problem with rational equations (example)", "kind": "Video", "description": "Sal solves a word problem about the combined deck-staining rates of Anya and Bill, by creating a rational equation that models the situation.", "slug": "applying-rational-equations-2"}, {"path": "khan/math/algebra2/rational-expressions-equations-and-functions/modeling-with-rational-functions/applying-rational-equations-3/", "id": "B0Z4s38YIgQ", "title": "How to solve a word problem with rational equations incl. eliminating solutions (example)", "kind": "Video", "description": "Sal solves a word problem about the combined pool-filling rates of two water hoses, by creating a rational equation that models the situation. The equation has a solution that is eliminated due to the context.", "slug": "applying-rational-equations-3"}], "in_knowledge_map": false, "description": "See some examples of how rational functions and equations can come in handy when solving real-world word problems.", "node_slug": "modeling-with-rational-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/rational-expressions-equations-and-functions/modeling-with-rational-functions", "extended_slug": "math/algebra2/rational-expressions-equations-and-functions/modeling-with-rational-functions", "kind": "Topic", "slug": "modeling-with-rational-functions"}], "in_knowledge_map": false, "description": "Rational expressions are like fractions, but instead of integers in the numerator and the denominator, you have variable expressions! Learn how to work with such expressions. Namely, simplify, add, subtract, multiply, and divide them (much like fractions!). Then, solve some equations with rational expressions in them, and analyze the behavior of rational functions.", "node_slug": "rational-expressions-equations-and-functions", "render_type": "Topic", "topic_page_url": "/math/algebra2/rational-expressions-equations-and-functions", "extended_slug": "math/algebra2/rational-expressions-equations-and-functions", "kind": "Topic", "slug": "rational-expressions-equations-and-functions"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/logarithms-tutorial/", "id": "logarithms-tutorial", "hide": false, "title": "Logarithms", "child_data": [{"kind": "Topic", "id": "xed9e39d2"}, {"kind": "Topic", "id": "x939a68a1"}, {"kind": "Topic", "id": "x906a1436"}, {"kind": "Topic", "id": "x4604d74c"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/", "id": "logarithm_basics", "hide": false, "title": "Logarithm basics", "child_data": [{"kind": "Video", "id": "1242982964"}, {"kind": "Exercise", "id": "3021"}, {"kind": "Video", "id": "1243193209"}, {"kind": "Exercise", "id": "1226239193"}, {"kind": "Video", "id": "x19c7ee10"}, {"kind": "Video", "id": "xce641b55"}, {"kind": "Video", "id": "x1030e61c"}, {"kind": "Video", "id": "x07bc9727"}, {"kind": "Exercise", "id": "x105cd592"}, {"kind": "Video", "id": "367721780"}], "children": [{"path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/logarithms/", "id": "Z5myJ8dg_rM", "title": "Logarithms", "kind": "Video", "description": "Intro to logarithms. Learning that logarithms are just a way of expressing \"the exponent that you have to raise a base to to get another number\"", "slug": "logarithms"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/logarithms_1/", "id": "logarithms_1", "title": "Evaluating logarithms", "slug": "logarithms_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/fancier-logarithm-expressions/", "id": "eTWCARmrzJ0", "title": "Fancier logarithm expressions", "kind": "Video", "description": "Examples of logarithms that evaluate to fractional and negative values.", "slug": "fancier-logarithm-expressions"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/logarithms_15/", "id": "logarithms_1.5", "title": "Evaluating logarithms 2", "slug": "logarithms_15", "kind": "Exercise"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/exponential-to-logarithmic-form/", "id": "Obch1OP5QyA", "title": "Writing in logarithmic and exponential form", "kind": "Video", "slug": "exponential-to-logarithmic-form"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/logarithm-exponential-deductions/", "id": "Iz6IVf8frjw", "title": "Deducing with logarithmic and exponential form", "kind": "Video", "slug": "logarithm-exponential-deductions"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/exponential-equation/", "id": "R443Db-wJ5o", "title": "Solving exponential equation with logarithm", "kind": "Video", "slug": "exponential-equation"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/plotting-exponential-logarithm/", "id": "DhW9pz5Vfwo", "title": "Plotting points of logarithmic function", "kind": "Video", "slug": "plotting-exponential-logarithm"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/understanding-logs-as-inverse-exponentials/", "id": "understanding-logs-as-inverse-exponentials", "title": "Understanding logarithms as inverse exponentials", "slug": "understanding-logs-as-inverse-exponentials", "kind": "Exercise"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_basics/graphing-logarithmic-functions/", "id": "DuYgVVU_BwY", "title": "Graphing logarithmic functions", "kind": "Video", "description": "Graphing Logarithmic Functions", "slug": "graphing-logarithmic-functions"}], "in_knowledge_map": false, "description": "If you understand how to take an exponent and you're looking to take your mathematical game to a new level, then you've found the right tutorial. Put simply and confusingly, logarithms are inverse operators to exponents (just as subtraction to addition or division to multiplication). As you'll see, taking a logarithm of something tells you what exponent you need to raise a base to to get that number.", "node_slug": "logarithm_basics", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/logarithms-tutorial/logarithm_basics", "extended_slug": "math/algebra2/logarithms-tutorial/logarithm_basics", "kind": "Topic", "slug": "logarithm_basics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/", "id": "logarithm_properties", "hide": false, "title": "Logarithm properties", "child_data": [{"kind": "Video", "id": "25781"}, {"kind": "Video", "id": "25783"}, {"kind": "Video", "id": "367723734"}, {"kind": "Video", "id": "367722960"}, {"kind": "Video", "id": "367723732"}, {"kind": "Exercise", "id": "47892376"}, {"kind": "Video", "id": "367721779"}, {"kind": "Video", "id": "23514"}, {"kind": "Video", "id": "23516"}, {"kind": "Video", "id": "1335425394"}, {"kind": "Video", "id": "364981334"}, {"kind": "Video", "id": "370262996"}, {"kind": "Video", "id": "367722962"}, {"kind": "Video", "id": "214235939"}, {"kind": "Video", "id": "231149553"}], "children": [{"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/introduction-to-logarithm-properties/", "id": "PupNgv49_WY", "title": "Introduction to logarithm properties", "kind": "Video", "description": "Introduction to the first two logarithm properties.", "slug": "introduction-to-logarithm-properties"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/introduction-to-logarithm-properties-part-2/", "id": "TMmxKZaCqe0", "title": "Introduction to logarithm properties (part 2)", "kind": "Video", "description": "Second part of the introduction to logarithm properties.", "slug": "introduction-to-logarithm-properties-part-2"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/logarithm-of-a-power/", "id": "Pb9V374iOas", "title": "Logarithm of a power", "kind": "Video", "description": "Logarithm of a Power", "slug": "logarithm-of-a-power"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/sum-of-logarithms-with-same-base/", "id": "pkGrXzakRFs", "title": "Sum of logarithms with same base", "kind": "Video", "description": "Sum of Logarithms with Same Base", "slug": "sum-of-logarithms-with-same-base"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/using-multiple-logarithm-properties-to-simplify/", "id": "RhzXX5PbsuQ", "title": "Using multiple logarithm properties to simplify", "kind": "Video", "description": "Using Multiple Logarithm Properties to Simplify", "slug": "using-multiple-logarithm-properties-to-simplify"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/logarithms_2/", "id": "logarithms_2", "title": "Operations with logarithms", "slug": "logarithms_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/change-of-base-formula/", "id": "OkFdDqW9xxM", "title": "Change of base formula", "kind": "Video", "description": "Change of Base Formula", "slug": "change-of-base-formula"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/proof-log-a-log-b-log-ab/", "id": "FP2arCfAfBY", "title": "Proof: log a + log b = log ab", "kind": "Video", "description": "Proof of the logarithm property: log a + log b = log ab", "slug": "proof-log-a-log-b-log-ab"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/proof-a-log-b-log-b-a-log-a-log-b-log-a-b/", "id": "yEAxG_D1HDw", "title": "Proof: a log b = log(b^a), log a - log b = log(a/b)", "kind": "Video", "description": "Proofs of the logarithm properties: A(log B) = log (B^A) and log A - log B = log (A/B)", "slug": "proof-a-log-b-log-b-a-log-a-log-b-log-a-b"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/change-of-base-formula-proof/", "id": "1reblXFlM6I", "title": "Change of base formula proof", "kind": "Video", "slug": "change-of-base-formula-proof"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/logarithmic-equations/", "id": "fyshrv6YDVY", "title": "Logarithmic equations", "kind": "Video", "description": "Logarithmic Equations", "slug": "logarithmic-equations"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/solving-logarithmic-equations/", "id": "Kv2iHde7Xgw", "title": "Solving logarithmic equations", "kind": "Video", "description": "Solving Logarithmic Equations", "slug": "solving-logarithmic-equations"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/solving-logarithmic-equations_dup_1/", "id": "oqAYqT70EBQ", "title": "Solving logarithmic equations", "kind": "Video", "description": "Solving Logarithmic Equations", "slug": "solving-logarithmic-equations_dup_1"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/logarithmic-scale/", "id": "sBhEi4L91Sg", "title": "Logarithmic scale", "kind": "Video", "description": "Understanding how logarithmic scale is different from linear scale and why it could be useful", "slug": "logarithmic-scale"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithm_properties/richter-scale/", "id": "RFn-IGlayAg", "title": "Richter scale", "kind": "Video", "description": "The basics of the logarithmic Richter and Moment Magnitude Scales to measure earthquakes", "slug": "richter-scale"}], "in_knowledge_map": false, "description": "You want to go deeper in your understanding of logarithms. This tutorial does just that by exploring properties of logarithms that will help you manipulate them in entirely new ways (mostly falling out of exponent properties).", "node_slug": "logarithm_properties", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/logarithms-tutorial/logarithm_properties", "extended_slug": "math/algebra2/logarithms-tutorial/logarithm_properties", "kind": "Topic", "slug": "logarithm_properties"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/logarithms-tutorial/natural_logarithm/", "id": "natural_logarithm", "hide": false, "title": "Natural logarithms", "child_data": [{"kind": "Video", "id": "367722961"}, {"kind": "Video", "id": "370285900"}, {"kind": "Video", "id": "367721777"}], "children": [{"path": "khan/math/algebra2/logarithms-tutorial/natural_logarithm/natural-logarithm-with-a-calculator/", "id": "Dpo_-GrMpNE", "title": "Natural logarithm with a calculator", "kind": "Video", "description": "Natural Logarithm with a Calculator", "slug": "natural-logarithm-with-a-calculator"}, {"path": "khan/math/algebra2/logarithms-tutorial/natural_logarithm/calculator-for-natural-logarithms/", "id": "r0eFSS8CN-Q", "title": "Calculator for natural logarithms", "kind": "Video", "description": "Calculator for Natural Logarithms", "slug": "calculator-for-natural-logarithms"}, {"path": "khan/math/algebra2/logarithms-tutorial/natural_logarithm/graphing-natural-logarithm-function/", "id": "xmjy-0TxgI8", "title": "Graphing natural logarithm function", "kind": "Video", "description": "Graphing Natural Logarithm Function", "slug": "graphing-natural-logarithm-function"}], "in_knowledge_map": false, "description": "e is a special number that shows up throughout nature (you will appreciate this more and more as you develop your mathematical understanding). Given this, logarithms with base e have a special name--natural logarithms. In this tutorial, we will learn to evaluate and graph this special function.", "node_slug": "natural_logarithm", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/logarithms-tutorial/natural_logarithm", "extended_slug": "math/algebra2/logarithms-tutorial/natural_logarithm", "kind": "Topic", "slug": "natural_logarithm"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/logarithms-tutorial/logarithmic-scale-patterns/", "id": "logarithmic-scale-patterns", "hide": false, "title": "Logarithmic scale and patterns", "child_data": [{"kind": "Video", "id": "214235939"}, {"kind": "Video", "id": "214235938"}, {"kind": "Video", "id": "214235937"}], "children": [{"path": "khan/math/algebra2/logarithms-tutorial/logarithmic-scale-patterns/logarithmic-scale/", "id": "sBhEi4L91Sg", "title": "Logarithmic scale", "kind": "Video", "description": "Understanding how logarithmic scale is different from linear scale and why it could be useful", "slug": "logarithmic-scale"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithmic-scale-patterns/vi-and-sal-talk-about-the-mysteries-of-benford-s-law/", "id": "6KmeGpjeLZ0", "title": "Vi and Sal talk about the mysteries of Benford's law", "kind": "Video", "description": "Vi Hart visits Khan Academy and talks about Benford's Law with Sal", "slug": "vi-and-sal-talk-about-the-mysteries-of-benford-s-law"}, {"path": "khan/math/algebra2/logarithms-tutorial/logarithmic-scale-patterns/benford-s-law-explanation-sequel-to-mysteries-of-benford-s-law/", "id": "SZUDoEdjTzg", "title": "Benford's law explanation (sequel to mysteries of Benford's law)", "kind": "Video", "description": "Vi and Sal talk through the intuition of Benford's law (part 2)", "slug": "benford-s-law-explanation-sequel-to-mysteries-of-benford-s-law"}], "in_knowledge_map": false, "description": "Logarithms show up in science and music far more than you might first imagine. This tutorial explores where these appearances occur!", "node_slug": "logarithmic-scale-patterns", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/logarithms-tutorial/logarithmic-scale-patterns", "extended_slug": "math/algebra2/logarithms-tutorial/logarithmic-scale-patterns", "kind": "Topic", "slug": "logarithmic-scale-patterns"}], "in_knowledge_map": false, "description": "Log-a-what? No, this tutorial is about neither chopped wood nor music (actually logarithms do have applications in music), but it is fascinating nonetheless.\n\nYou know how to take an exponent. Now you can think about what exponent you have to raise a number to to get another number. Yes, I agree--unstoppable fun for the whole family. No, seriously, logarithms are used everywhere (including to measure earthquakes and sound).", "node_slug": "logarithms-tutorial", "render_type": "Topic", "topic_page_url": "/math/algebra2/logarithms-tutorial", "extended_slug": "math/algebra2/logarithms-tutorial", "kind": "Topic", "slug": "logarithms-tutorial"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/exponential_and_logarithmic_func/", "id": "exponential_and_logarithmic_func", "hide": false, "title": "Exponential and logarithmic functions", "child_data": [{"kind": "Topic", "id": "x05dc303d"}, {"kind": "Topic", "id": "xfff6f0d3"}, {"kind": "Topic", "id": "x43314421"}, {"kind": "Topic", "id": "xf5df82eb"}, {"kind": "Topic", "id": "x825dc5bd"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/", "id": "exp_growth_decay", "hide": false, "title": "Exponential growth and decay", "child_data": [{"kind": "Video", "id": "23694"}, {"kind": "Video", "id": "364954029"}, {"kind": "Video", "id": "x9c757281"}, {"kind": "Exercise", "id": "x84d72f79"}, {"kind": "Video", "id": "xb357b82e"}, {"kind": "Video", "id": "xc9227a8a"}, {"kind": "Exercise", "id": "xb303d7a0"}, {"kind": "Video", "id": "x51b990d2"}, {"kind": "Exercise", "id": "xde032092"}, {"kind": "Video", "id": "x6c7009f6"}, {"kind": "Video", "id": "x94bf277a"}, {"kind": "Exercise", "id": "xd61c5d0f"}], "children": [{"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/exponential-growth-functions/", "id": "6WMZ7J0wwMI", "title": "Introduction to exponential functions", "kind": "Video", "description": "Sal introduces and defines exponential functions using the example y = 3^x and graphing it. He also solves an exponential word problem.", "slug": "exponential-growth-functions"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/graphing-exponential-functions/", "id": "9SOSfRNCQZQ", "title": "How to graph a basic exponential function given its formula (example)", "kind": "Video", "description": "Sal shows how to graph y=5^x, including a discussion of the end behavior of the function.", "slug": "graphing-exponential-functions"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/linear-exponential-models/", "id": "8OHEgD6YMBw", "title": "How to distinguish between linear and exponential models (examples)", "kind": "Video", "description": "Sal sorts various descriptions of real-world situation according to the type of growth they describe: linear or exponential.", "slug": "linear-exponential-models"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/understanding-linear-and-exponential-models/", "id": "understanding-linear-and-exponential-models", "title": "Distinguish between linear and exponential models", "description": "Given a verbal description of a real-world relationship, determine whether that relationship is linear or exponential.", "slug": "understanding-linear-and-exponential-models", "kind": "Exercise"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/simplifying-an-exponential-expression/", "id": "Y6wNiYcuCoE", "title": "Simplifying an exponential expression", "kind": "Video", "slug": "simplifying-an-exponential-expression"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/rewriting-an-exponential-expression-in-a-hairier-way/", "id": "vSijVSL3ChU", "title": "Rewriting an exponential expression in a hairier way", "kind": "Video", "slug": "rewriting-an-exponential-expression-in-a-hairier-way"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/equivalent-forms-of-expressions-with-variable-exponents/", "id": "equivalent-forms-of-expressions-with-variable-exponents", "title": "Equivalent forms of exponential expressions", "slug": "equivalent-forms-of-expressions-with-variable-exponents", "kind": "Exercise"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/comparing-exponentials-quadratics/", "id": "EuwKjpUpkhs", "title": "How to compare the growth of an exponential model and a quadratic model (example)", "kind": "Video", "description": "Sal discusses two functions that model the shipment rate of cars. One function is quadratic and the other is exponential. Which one will eventually exceed the other?", "slug": "comparing-exponentials-quadratics"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/comparing-growth-rates-of-exponentials-and-polynomials/", "id": "comparing-growth-rates-of-exponentials-and-polynomials", "title": "Compare the growth rates of exponentials and polynomials", "description": "Practice analyzing the end behavior of two functions that model similar real-world relationship, where one function is exponential and the other is polynomial.", "slug": "comparing-growth-rates-of-exponentials-and-polynomials", "kind": "Exercise"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/constructing-linear-and-exponential-functions-from-data/", "id": "Qst1UVtq8pE", "title": "How to construct linear and basic exponential functions from a table of values (example)", "kind": "Video", "description": "Sal constructs a linear function of the form f(x)=mx+b and an exponential function of the form g(x)=a*r^x, given a table of values of those functions.", "slug": "constructing-linear-and-exponential-functions-from-data"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/constructing-linear-and-exponential-functions-from-graph/", "id": "-VQf_hJOEvM", "title": "How to construct linear and basic exponential functions from their graphs (example)", "kind": "Video", "description": "Sal constructs a linear function of the form f(x)=mx+b and an exponential function of the form g(x)=a*r^x, given the graphs of those functions.", "slug": "constructing-linear-and-exponential-functions-from-graph"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay/constructing-linear-and-exponential-functions/", "id": "constructing-linear-and-exponential-functions", "title": "Constructing linear and exponential functions", "slug": "constructing-linear-and-exponential-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "From compound interest to population growth to half lives of radioactive materials, it all comes down to exponential growth and decay.", "node_slug": "exp_growth_decay", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/exponential_and_logarithmic_func/exp_growth_decay", "extended_slug": "math/algebra2/exponential_and_logarithmic_func/exp_growth_decay", "kind": "Topic", "slug": "exp_growth_decay"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/exponential_and_logarithmic_func/exponential-modeling/", "id": "exponential-modeling", "hide": false, "title": "Modeling with exponential functions", "child_data": [{"kind": "Video", "id": "23700"}, {"kind": "Video", "id": "x5621b10d"}, {"kind": "Video", "id": "xd71282d5"}, {"kind": "Exercise", "id": "xab30b081"}, {"kind": "Exercise", "id": "xe0d3a3c1"}, {"kind": "Video", "id": "xad64718b"}, {"kind": "Exercise", "id": "x61a26e02"}], "children": [{"path": "khan/math/algebra2/exponential_and_logarithmic_func/exponential-modeling/word-problem-solving-exponential-growth-and-decay/", "id": "m5Tf6vgoJtQ", "title": "How to solve word problems about exponential growth and decay (examples)", "kind": "Video", "description": "Sal solves two word problems: one about a radioactive decay, and the other the exponential growth of a fast-food chain.", "slug": "word-problem-solving-exponential-growth-and-decay"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exponential-modeling/decay-of-cesium-137-example/", "id": "polop-89aIA", "title": "Decay of cesium 137 example", "kind": "Video", "slug": "decay-of-cesium-137-example"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exponential-modeling/modeling-ticket-fines-with-exponential-function/", "id": "EtefJ85R1OQ", "title": "How to model a real-world context with a basic exponential function (example)", "kind": "Video", "description": "Sal solves a word problem where he models the growth of a speeding ticket fine over time as an exponential function, and then interprets this model.", "slug": "modeling-ticket-fines-with-exponential-function"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exponential-modeling/rewriting-and-interpreting-exponential-functions/", "id": "rewriting-and-interpreting-exponential-functions", "title": "Rewriting and interpreting exponential functions", "slug": "rewriting-and-interpreting-exponential-functions", "kind": "Exercise"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exponential-modeling/modeling-with-exponential-functions/", "id": "modeling-with-exponential-functions", "title": "Modeling with exponential functions", "slug": "modeling-with-exponential-functions", "kind": "Exercise"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exponential-modeling/solve-exponentials/", "id": "7Ig6kVZaWoU", "title": "Solving exponential equation", "kind": "Video", "slug": "solve-exponentials"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/exponential-modeling/using-logarithms-to-solve-exponential-equations/", "id": "using-logarithms-to-solve-exponential-equations", "title": "Using logarithms to solve exponential equations", "slug": "using-logarithms-to-solve-exponential-equations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "As we'll see in this tutorial, anything from compound interest to radioactive decay can be modeled with exponential functions.", "node_slug": "exponential-modeling", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/exponential_and_logarithmic_func/exponential-modeling", "extended_slug": "math/algebra2/exponential_and_logarithmic_func/exponential-modeling", "kind": "Topic", "slug": "exponential-modeling"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/", "id": "log_functions", "hide": false, "title": "Logarithmic functions", "child_data": [{"kind": "Video", "id": "xd6ac565c"}, {"kind": "Video", "id": "367721780"}, {"kind": "Video", "id": "x9061c6c9"}, {"kind": "Video", "id": "x74c0eb39"}, {"kind": "Exercise", "id": "x03a7bfdf"}, {"kind": "Video", "id": "214235936"}], "children": [{"path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/comparing-exponential-logarithmic-functions/", "id": "K_PiPfYxtao", "title": "Comparing exponential and logarithmic functions", "kind": "Video", "slug": "comparing-exponential-logarithmic-functions"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/graphing-logarithmic-functions/", "id": "DuYgVVU_BwY", "title": "Graphing logarithmic functions", "kind": "Video", "description": "Graphing Logarithmic Functions", "slug": "graphing-logarithmic-functions"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/matching-exponential-functions/", "id": "EwEbZI57P1o", "title": "Matching functions to their graphs", "kind": "Video", "slug": "matching-exponential-functions"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/logarithmic-function-graphs/", "id": "LqyA96oYtwE", "title": "Graphs of logarithmic functions", "kind": "Video", "slug": "logarithmic-function-graphs"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/graphs-of-exponentials-and-logarithms/", "id": "graphs-of-exponentials-and-logarithms", "title": "Graphs of exponentials and logarithms", "slug": "graphs-of-exponentials-and-logarithms", "kind": "Exercise"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/log_functions/vi-and-sal-explore-how-we-think-about-scale/", "id": "4xfOq00BzJA", "title": "Vi and Sal explore how we think about scale", "kind": "Video", "description": "Vi Hart (http://www.youtube.com/vihart) and Sal talk about how we humans perceive things nonlinearly", "slug": "vi-and-sal-explore-how-we-think-about-scale"}], "in_knowledge_map": false, "description": "This tutorial shows you what a logarithmic function is. It will then go on to show the many times in nature and science that these type of functions are useful to describe what is happening.", "node_slug": "log_functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/exponential_and_logarithmic_func/log_functions", "extended_slug": "math/algebra2/exponential_and_logarithmic_func/log_functions", "kind": "Topic", "slug": "log_functions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/exponential_and_logarithmic_func/logarithmic-equations/", "id": "logarithmic-equations", "hide": false, "title": "Logarithmic equations", "child_data": [{"kind": "Video", "id": "367722962"}, {"kind": "Video", "id": "370262996"}], "children": [{"path": "khan/math/algebra2/exponential_and_logarithmic_func/logarithmic-equations/solving-logarithmic-equations_dup_1/", "id": "oqAYqT70EBQ", "title": "Solving logarithmic equations", "kind": "Video", "description": "Solving Logarithmic Equations", "slug": "solving-logarithmic-equations_dup_1"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/logarithmic-equations/solving-logarithmic-equations/", "id": "Kv2iHde7Xgw", "title": "Solving logarithmic equations", "kind": "Video", "description": "Solving Logarithmic Equations", "slug": "solving-logarithmic-equations"}], "in_knowledge_map": false, "description": "Now that you are familiar with logarithms and logarithmic functions, let's think about how to solve equations involving logarithms.", "node_slug": "logarithmic-equations", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/exponential_and_logarithmic_func/logarithmic-equations", "extended_slug": "math/algebra2/exponential_and_logarithmic_func/logarithmic-equations", "kind": "Topic", "slug": "logarithmic-equations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/exponential_and_logarithmic_func/continuous_compounding/", "id": "continuous_compounding", "hide": false, "title": "Continuous compounding and e", "child_data": [{"kind": "Video", "id": "24798"}, {"kind": "Video", "id": "24800"}, {"kind": "Video", "id": "24850"}, {"kind": "Video", "id": "24852"}, {"kind": "Video", "id": "24854"}, {"kind": "Video", "id": "24856"}], "children": [{"path": "khan/math/algebra2/exponential_and_logarithmic_func/continuous_compounding/introduction-to-interest/", "id": "GtaoP0skPWc", "title": "Introduction to interest", "kind": "Video", "description": "What interest is. Simple versus compound interest.", "slug": "introduction-to-interest"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/continuous_compounding/interest-part-2/", "id": "t4zfiBw0hwM", "title": "Interest (part 2)", "kind": "Video", "description": "More on simple and compound interest", "slug": "interest-part-2"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/continuous_compounding/introduction-to-compound-interest-and-e/", "id": "qEB6y4DklNY", "title": "Introduction to compound interest and e", "kind": "Video", "description": "Compounding interest multiple times a year.", "slug": "introduction-to-compound-interest-and-e"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/continuous_compounding/compound-interest-and-e-part-2/", "id": "dzMvqJMLy9c", "title": "Compound interest and e (part 2)", "kind": "Video", "description": "Compounding 100% annual interest continuously over a year converges to e (2.71...)", "slug": "compound-interest-and-e-part-2"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/continuous_compounding/compound-interest-and-e-part-3/", "id": "sQYpUJV8foY", "title": "Compound interest and e (part 3)", "kind": "Video", "description": "Continuously compounding $P in principal at an annual interest rate of r for a year ends up with a final payment of $Pe^r", "slug": "compound-interest-and-e-part-3"}, {"path": "khan/math/algebra2/exponential_and_logarithmic_func/continuous_compounding/compound-interest-and-e-part-4/", "id": "VAxHMTJRhmY", "title": "Compound interest and e (part 4)", "kind": "Video", "description": "Continuously compounding for multiple years.", "slug": "compound-interest-and-e-part-4"}], "in_knowledge_map": false, "description": "This tutorial introduces us to one of the derivations (from finance and continuously compounding interest) of the irrational number 'e' which is roughly 2.71...", "node_slug": "continuous_compounding", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/exponential_and_logarithmic_func/continuous_compounding", "extended_slug": "math/algebra2/exponential_and_logarithmic_func/continuous_compounding", "kind": "Topic", "slug": "continuous_compounding"}], "in_knowledge_map": false, "description": "A look at exponential and logarithmic functions including many of their properties and graphs.", "node_slug": "exponential_and_logarithmic_func", "render_type": "Topic", "topic_page_url": "/math/algebra2/exponential_and_logarithmic_func", "extended_slug": "math/algebra2/exponential_and_logarithmic_func", "kind": "Topic", "slug": "exponential_and_logarithmic_func"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/functions-and-graphs/", "id": "functions-and-graphs", "hide": false, "title": "Advanced functions", "child_data": [{"kind": "Topic", "id": "x6ba3f1ea"}, {"kind": "Topic", "id": "x1e63188f"}, {"kind": "Topic", "id": "x38dcc4f2"}, {"kind": "Topic", "id": "x758ed5f0"}, {"kind": "Topic", "id": "x37cf59a0"}, {"kind": "Topic", "id": "xc5c199f2"}, {"kind": "Topic", "id": "x45848fa2"}, {"kind": "Topic", "id": "x24ccd218"}, {"kind": "Topic", "id": "x1d295b54"}, {"kind": "Topic", "id": "x2e94cc94"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/functions-and-graphs/function-introduction/", "id": "function-introduction", "hide": false, "title": "Function introduction", "child_data": [{"kind": "Video", "id": "x2ec1ec8a"}, {"kind": "Video", "id": "1254705646"}, {"kind": "Video", "id": "357917981"}, {"kind": "Video", "id": "23642"}, {"kind": "Video", "id": "x1292edd2"}, {"kind": "Video", "id": "xbdf4c75d"}, {"kind": "Video", "id": "x5860a542"}, {"kind": "Exercise", "id": "3030"}], "children": [{"path": "khan/math/algebra2/functions-and-graphs/function-introduction/what-is-a-function/", "id": "kvGsIo1TmsM", "title": "What is a function?", "kind": "Video", "description": "Functions assign a single unique output for each of their inputs. In this video, Sal gives many examples of various kinds of functions.", "slug": "what-is-a-function"}, {"path": "khan/math/algebra2/functions-and-graphs/function-introduction/difference-between-equations-and-functions/", "id": "l3iXON1xEC4", "title": "Difference between equations and functions", "kind": "Video", "description": "Jesse Roe and Sal talk about the difference between equations and functions", "slug": "difference-between-equations-and-functions"}, {"path": "khan/math/algebra2/functions-and-graphs/function-introduction/relations-and-functions/", "id": "Uz0MtFlLD-k", "title": "Relations and functions", "kind": "Video", "description": "Relations and Functions", "slug": "relations-and-functions"}, {"path": "khan/math/algebra2/functions-and-graphs/function-introduction/linear-function-graphs/", "id": "EmTvdKkAUtE", "title": "Evaluating with function notation", "kind": "Video", "description": "Linear Function Graphs", "slug": "linear-function-graphs"}, {"path": "khan/math/algebra2/functions-and-graphs/function-introduction/understanding-function-notation-example-1/", "id": "Id6UovYjd-M", "title": "How to evaluate a function given its formula (example)", "kind": "Video", "description": "Sal evaluates f(x)=49-x^2 at x=5.", "slug": "understanding-function-notation-example-1"}, {"path": "khan/math/algebra2/functions-and-graphs/function-introduction/understanding-function-notation-example-2/", "id": "kzYtx_AqzjM", "title": "How to evaluate a function given its graph (example)", "kind": "Video", "description": "Sal evaluates a function at x=-1 using the graph of that function.", "slug": "understanding-function-notation-example-2"}, {"path": "khan/math/algebra2/functions-and-graphs/function-introduction/understanding-function-notation-example-3/", "id": "IXRMVcoqRRQ", "title": "Function notation in context example", "kind": "Video", "slug": "understanding-function-notation-example-3"}, {"path": "khan/math/algebra2/functions-and-graphs/function-introduction/functions_1/", "id": "functions_1", "title": "Evaluating functions", "description": "Evaluate functions at a specific input value, given either the functions' formula or their graph.", "slug": "functions_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Relationships can be any association between sets of numbers while functions have only one output for a given input. This tutorial works through a bunch of examples of testing whether something is a valid function. As always, we really encourage you to pause the videos and try the problems before Sal does!", "node_slug": "function-introduction", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/functions-and-graphs/function-introduction", "extended_slug": "math/algebra2/functions-and-graphs/function-introduction", "kind": "Topic", "slug": "function-introduction"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/functions-and-graphs/domain_range/", "id": "domain_range", "hide": false, "title": "Domain and range", "child_data": [{"kind": "Video", "id": "23512"}, {"kind": "Video", "id": "357927412"}, {"kind": "Exercise", "id": "371794641"}, {"kind": "Video", "id": "364981333"}, {"kind": "Video", "id": "26792"}, {"kind": "Video", "id": "364967637"}, {"kind": "Exercise", "id": "2025"}, {"kind": "Video", "id": "26793"}, {"kind": "Video", "id": "23590"}, {"kind": "Exercise", "id": "47889342"}], "children": [{"path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-of-a-function/", "id": "U-k5N1WPk4g", "title": "Domain of a function", "kind": "Video", "description": "Figuring out the domain of a function", "slug": "domain-of-a-function"}, {"path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-and-range-of-a-relation/", "id": "g3LrOw1JMi8", "title": "Domain and range of a relation", "kind": "Video", "description": "Domain and Range of a Relation", "slug": "domain-and-range-of-a-relation"}, {"path": "khan/math/algebra2/functions-and-graphs/domain_range/domain_and_range_05/", "id": "domain_and_range_0.5", "title": "Domain and range from graph", "description": "Given the graph of a function, determine its domain or range.", "slug": "domain_and_range_05", "kind": "Exercise"}, {"path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-and-range-of-a-function-given-a-formula/", "id": "za0QJRZ-yQ4", "title": "Domain and range of a function given a formula", "kind": "Video", "description": "Domain and Range of a Function Given a Formula", "slug": "domain-and-range-of-a-function-given-a-formula"}, {"path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-and-range-1/", "id": "C6F33Ir-sY4", "title": "Domain of modeling functions", "kind": "Video", "description": "Domain of modeling functions", "slug": "domain-and-range-1"}, {"path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-of-a-radical-function/", "id": "4h54s7BBPpA", "title": "How to determine the domain of a radical function (example)", "kind": "Video", "description": "Sal finds the domain of f(x)=\u221a(2x-8).", "slug": "domain-of-a-radical-function"}, {"path": "khan/math/algebra2/functions-and-graphs/domain_range/domain_of_a_function/", "id": "domain_of_a_function", "title": "Domain of a function", "description": "Given the equation of a function, determine the domain.", "slug": "domain_of_a_function", "kind": "Exercise"}, {"path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-and-range-2/", "id": "0lY4PcCYoyE", "title": "Domain and range 2", "kind": "Video", "description": "Domain and Range 2", "slug": "domain-and-range-2"}, {"path": "khan/math/algebra2/functions-and-graphs/domain_range/domain-and-range-of-a-function/", "id": "O0uUVH8dRiU", "title": "Domain and range of a function", "kind": "Video", "slug": "domain-and-range-of-a-function"}, {"path": "khan/math/algebra2/functions-and-graphs/domain_range/range_of_a_function/", "id": "range_of_a_function", "title": "Range of a function", "description": "Given the equation of a quadratic function, determine the range.", "slug": "range_of_a_function", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What values can you and can you not input into a function? What values can the function output? The domain is the set of values that the function is defined for (i.e., the values that you can input into a function). The range is the set of values that the function output can take on.\n\nThis tutorial covers the ideas of domain and range through multiple worked examples. These are really important ideas as you study higher mathematics.", "node_slug": "domain_range", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/functions-and-graphs/domain_range", "extended_slug": "math/algebra2/functions-and-graphs/domain_range", "kind": "Topic", "slug": "domain_range"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/", "id": "recognizing-functions-2", "hide": false, "title": "Recognizing functions", "child_data": [{"kind": "Video", "id": "26791"}, {"kind": "Video", "id": "357917979"}, {"kind": "Video", "id": "23592"}, {"kind": "Video", "id": "xe1f24412"}, {"kind": "Video", "id": "x5b15777f"}, {"kind": "Video", "id": "26790"}, {"kind": "Video", "id": "x9cd7b997"}, {"kind": "Exercise", "id": "xe051d459"}, {"kind": "Video", "id": "xce131edd"}, {"kind": "Video", "id": "xe4c1673b"}, {"kind": "Exercise", "id": "xe3f06745"}], "children": [{"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/testing-if-a-relationship-is-a-function/", "id": "3SO1BQQ9_1E", "title": "Testing if a relationship is a function", "kind": "Video", "description": "Testing if a relationship is a function", "slug": "testing-if-a-relationship-is-a-function"}, {"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/graphical-relations-and-functions/", "id": "qGmJ4F3b5W8", "title": "How to check if a set of points on the graph represents a function (example)", "kind": "Video", "description": "Sal checks whether a given set of points can represent a function. For the set to represent a function, each domain element must have one corresponding range element at most.", "slug": "graphical-relations-and-functions"}, {"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/functions-as-graphs/", "id": "jQ-fS2lsslU", "title": "Functions as graphs", "kind": "Video", "slug": "functions-as-graphs"}, {"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/recognizing-functions-example-1/", "id": "tBRW-CyJE6k", "title": "How to check if a relationship between variables described verbally represents a function (example)", "kind": "Video", "description": "Sal checks whether y can be described as a function of x if y is always three more than twice x.", "slug": "recognizing-functions-example-1"}, {"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/recognizing-functions-example-2/", "id": "_npwsLh0vws", "title": "Does a vertical line represent a function?", "kind": "Video", "description": "Sal explains why a vertical line *doesn't* represent a function.", "slug": "recognizing-functions-example-2"}, {"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/functional-relationships-1/", "id": "5cK86VKoBPw", "title": "How to check if a table represents a function (example)", "kind": "Video", "description": "Sal checks whether a table of people and their heights can represent a function that assigns a height to a name.", "slug": "functional-relationships-1"}, {"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/recognizing-functions-example-3/", "id": "lEhf75ma7Ww", "title": "Recognizing functions (example 3)", "kind": "Video", "slug": "recognizing-functions-example-3"}, {"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/recognizing_functions/", "id": "recognizing_functions", "title": "Recognizing functions from tables", "description": "Determine if different relationships are functions or not.", "slug": "recognizing_functions", "kind": "Exercise"}, {"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/recognizing-functions-example-4/", "id": "QWLcNxQ3KvQ", "title": "Recognizing functions (example 4)", "kind": "Video", "slug": "recognizing-functions-example-4"}, {"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/recognizing-functions-example-5/", "id": "z45UEiPaE8c", "title": "How to check if a relationship between real-world quantities described verbally represents a function (example)", "kind": "Video", "description": "Sal checks whether a description of the price of an order can be represented as a function of the shipping cost.", "slug": "recognizing-functions-example-5"}, {"path": "khan/math/algebra2/functions-and-graphs/recognizing-functions-2/recog-func-2/", "id": "recog-func-2", "title": "Recognizing functions from graphs", "slug": "recog-func-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Not all relationships are functions. In this tutorial, you'll learn which are!", "node_slug": "recognizing-functions-2", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/functions-and-graphs/recognizing-functions-2", "extended_slug": "math/algebra2/functions-and-graphs/recognizing-functions-2", "kind": "Topic", "slug": "recognizing-functions-2"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/", "id": "piecewise-functions-tutorial", "hide": false, "title": "Piecewise functions", "child_data": [{"kind": "Video", "id": "x2ec1ec8a"}, {"kind": "Video", "id": "xf3662031"}, {"kind": "Video", "id": "x4c90ecdd"}, {"kind": "Exercise", "id": "x663be576"}, {"kind": "Video", "id": "x931bced2"}, {"kind": "Video", "id": "x5db71766"}, {"kind": "Exercise", "id": "x87e1c3c4"}, {"kind": "Video", "id": "x0c173c55"}, {"kind": "Video", "id": "x3af6a8cc"}, {"kind": "Exercise", "id": "xc9a70135"}], "children": [{"path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/what-is-a-function/", "id": "kvGsIo1TmsM", "title": "What is a function?", "kind": "Video", "description": "Functions assign a single unique output for each of their inputs. In this video, Sal gives many examples of various kinds of functions.", "slug": "what-is-a-function"}, {"path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/graphs-of-absolute-value-functions/", "id": "1OtzfP8fCNU", "title": "Graphs of absolute value functions", "kind": "Video", "slug": "graphs-of-absolute-value-functions"}, {"path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/absolute-value-graphing-exercise-example/", "id": "6TxlqANDjKM", "title": "Absolute value graphing exercise example", "kind": "Video", "slug": "absolute-value-graphing-exercise-example"}, {"path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/graphs-of-absolute-value-functions_1/", "id": "graphs-of-absolute-value-functions", "title": "Graphs of absolute value functions", "slug": "graphs-of-absolute-value-functions_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/piecewise-function-example/", "id": "tedzsRH0Jas", "title": "Introduction to piecewise functions", "kind": "Video", "description": "Sal explains what a piecewise function is, and finds the formula of a piecewise function given its graph.", "slug": "piecewise-function-example"}, {"path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/graphing-piecewise-function/", "id": "PQiXRrT_14o", "title": "How to graph a piecewise function (example)", "kind": "Video", "description": "Sal graphs a piecewise function given its formula. In this case, the function consists of three separate lines.", "slug": "graphing-piecewise-function"}, {"path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/piecewise-graphs-linear/", "id": "piecewise-graphs-linear", "title": "Graphs of piecewise linear functions", "slug": "piecewise-graphs-linear", "kind": "Exercise"}, {"path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/matching-expressions-to-define-intervals-of-functions-example/", "id": "iQk1M3-WvZM", "title": "Matching expressions to define intervals of functions example", "kind": "Video", "slug": "matching-expressions-to-define-intervals-of-functions-example"}, {"path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/finding-a-piecewise-function-definition-from-graph/", "id": "IJWDyPFXGyM", "title": "Finding a piecewise function definition from graph", "kind": "Video", "slug": "finding-a-piecewise-function-definition-from-graph"}, {"path": "khan/math/algebra2/functions-and-graphs/piecewise-functions-tutorial/graphing-piecewise-functions/", "id": "graphing-piecewise-functions", "title": "Graphs of piecewise nonlinear functions", "slug": "graphing-piecewise-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we will get practice looking at wackier functions that are defined interval by interval (or piece by piece)!", "node_slug": "piecewise-functions-tutorial", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/functions-and-graphs/piecewise-functions-tutorial", "extended_slug": "math/algebra2/functions-and-graphs/piecewise-functions-tutorial", "kind": "Topic", "slug": "piecewise-functions-tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/", "id": "analyzing_functions", "hide": false, "title": "Properties and features of functions", "child_data": [{"kind": "Video", "id": "xdf96166c"}, {"kind": "Exercise", "id": "1425290397"}, {"kind": "Video", "id": "62754978"}, {"kind": "Video", "id": "62754979"}, {"kind": "Exercise", "id": "3803992"}, {"kind": "Video", "id": "x88f83ee2"}, {"kind": "Video", "id": "x09a49d09"}, {"kind": "Video", "id": "x8dfd75e6"}, {"kind": "Exercise", "id": "x703fd465"}], "children": [{"path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/when-a-function-is-positive-or-negative/", "id": "eDv7dk9uNmM", "title": "How to identify positive and negative intervals (example)", "kind": "Video", "description": "Sal gives several example of graphs where he highlights positive or negative intervals of the function.", "slug": "when-a-function-is-positive-or-negative"}, {"path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/positive_and_negative_parts_of_functions/", "id": "positive_and_negative_parts_of_functions", "title": "Positive and negative intervals", "description": "Identify positive and negative regions on graphs of functions", "slug": "positive_and_negative_parts_of_functions", "kind": "Exercise"}, {"path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/recognizing-odd-and-even-functions/", "id": "8VgmBe3ulb8", "title": "Recognizing odd and even functions", "kind": "Video", "description": "Even and odd functions", "slug": "recognizing-odd-and-even-functions"}, {"path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/connection-between-even-and-odd-numbers-and-functions/", "id": "jFazrvLodrA", "title": "Connection between even and odd numbers and functions", "kind": "Video", "description": "A possible reason why even functions are called \"even\" and odd functions are called \"odd\"", "slug": "connection-between-even-and-odd-numbers-and-functions"}, {"path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/even_and_odd_functions/", "id": "even_and_odd_functions", "title": "Even and odd functions", "description": "Determine if a graphed function is even, odd, or neither.", "slug": "even_and_odd_functions", "kind": "Exercise"}, {"path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/recognizing-features-of-functions-example-1/", "id": "hpBBuaiIkrg", "title": "Recognizing features of functions (example 1)", "kind": "Video", "slug": "recognizing-features-of-functions-example-1"}, {"path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/recognizing-features-of-functions-2-example-2/", "id": "zltgXTlUVLw", "title": "Recognizing features of functions (example 2)", "kind": "Video", "slug": "recognizing-features-of-functions-2-example-2"}, {"path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/recognizing-features-of-functions-2-example-3/", "id": "uglmkcGWmx4", "title": "Recognizing features of functions (example 3)", "kind": "Video", "slug": "recognizing-features-of-functions-2-example-3"}, {"path": "khan/math/algebra2/functions-and-graphs/analyzing_functions/recog-features-func-2/", "id": "recog-features-func-2", "title": "Recognizing features of functions", "slug": "recog-features-func-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You know a function when you see one, but are curious to start looking deeper at their properties. Some functions seem to be mirror images around the y-axis while others seems to be flipped mirror images while others are neither. How can we shift and reflect them? \n\nThis tutorial addresses these questions by covering even and odd functions. It also covers how we can shift and reflect them. Enjoy!", "node_slug": "analyzing_functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/functions-and-graphs/analyzing_functions", "extended_slug": "math/algebra2/functions-and-graphs/analyzing_functions", "kind": "Topic", "slug": "analyzing_functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/", "id": "comparing-interpreting-functions", "hide": false, "title": "Comparing and interpreting functions", "child_data": [{"kind": "Video", "id": "xef8bffa5"}, {"kind": "Video", "id": "x62250c60"}, {"kind": "Exercise", "id": "x4d40c957"}, {"kind": "Video", "id": "x37888c41"}, {"kind": "Video", "id": "x8d256629"}, {"kind": "Video", "id": "xbb39e37a"}, {"kind": "Exercise", "id": "xcba1184a"}], "children": [{"path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/interpreting-features-of-functions-2-example-1/", "id": "M3PTPN7NH8M", "title": "How to interpret the y-intercept of a graph in context (example)", "kind": "Video", "description": "Sal discusses the meaning of the y-intercept of the graph of a function that models the height of a ball.", "slug": "interpreting-features-of-functions-2-example-1"}, {"path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/interpreting-features-of-functions-2-example-2/", "id": "ynIq9IxbVso", "title": "Interpreting features of functions (example 2)", "kind": "Video", "slug": "interpreting-features-of-functions-2-example-2"}, {"path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/interpret-features-func-2/", "id": "interpret-features-func-2", "title": "Interpreting graphs word problems", "description": "Match features of graphs of modeling functions to their real-world meaning.", "slug": "interpret-features-func-2", "kind": "Exercise"}, {"path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/comparing-features-of-functions-2-example-1/", "id": "w2BN2AJ4fOI", "title": "Comparing features of functions (example 1)", "kind": "Video", "slug": "comparing-features-of-functions-2-example-1"}, {"path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/comparing-features-of-functions-2-example-2/", "id": "4Bx06GFyhUA", "title": "Comparing features of functions (example 2)", "kind": "Video", "slug": "comparing-features-of-functions-2-example-2"}, {"path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/comparing-features-of-functions-2-example-3/", "id": "H1H0xmjZMPA", "title": "Comparing features of functions (example 3)", "kind": "Video", "slug": "comparing-features-of-functions-2-example-3"}, {"path": "khan/math/algebra2/functions-and-graphs/comparing-interpreting-functions/comparing-features-of-functions-2/", "id": "comparing-features-of-functions-2", "title": "Comparing features of functions", "slug": "comparing-features-of-functions-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we'll dive deeper into actually thinking about what functions represent and how one function compares to another.", "node_slug": "comparing-interpreting-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/functions-and-graphs/comparing-interpreting-functions", "extended_slug": "math/algebra2/functions-and-graphs/comparing-interpreting-functions", "kind": "Topic", "slug": "comparing-interpreting-functions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/", "id": "one-variable-modeling", "hide": false, "title": "Modeling with one-variable equations and inequalities", "child_data": [{"kind": "Video", "id": "x5d5d623c"}, {"kind": "Video", "id": "x8b9f273d"}, {"kind": "Video", "id": "x9c757281"}, {"kind": "Video", "id": "x45286516"}, {"kind": "Exercise", "id": "x84d72f79"}, {"kind": "Video", "id": "x63a87fa0"}, {"kind": "Video", "id": "x3de63390"}, {"kind": "Exercise", "id": "x6c2f57c8"}], "children": [{"path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/making-more-pizzas-to-spread-cost-per-pizza/", "id": "jQ15tkoXZoA", "title": "Making more pizzas to spread cost per pizza", "kind": "Video", "slug": "making-more-pizzas-to-spread-cost-per-pizza"}, {"path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/quadratic-inequality-word-problem/", "id": "GDppV18XDCs", "title": "Quadratic inequality word problem", "kind": "Video", "slug": "quadratic-inequality-word-problem"}, {"path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/linear-exponential-models/", "id": "8OHEgD6YMBw", "title": "How to distinguish between linear and exponential models (examples)", "kind": "Video", "description": "Sal sorts various descriptions of real-world situation according to the type of growth they describe: linear or exponential.", "slug": "linear-exponential-models"}, {"path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/constructing-an-exponential-equation-example/", "id": "IlFD0LzAZeo", "title": "Constructing an exponential equation example", "kind": "Video", "slug": "constructing-an-exponential-equation-example"}, {"path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/understanding-linear-and-exponential-models/", "id": "understanding-linear-and-exponential-models", "title": "Distinguish between linear and exponential models", "description": "Given a verbal description of a real-world relationship, determine whether that relationship is linear or exponential.", "slug": "understanding-linear-and-exponential-models", "kind": "Exercise"}, {"path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/quadratic-inequality-example/", "id": "OP91XWBRI1w", "title": "Quadratic inequality example", "kind": "Video", "slug": "quadratic-inequality-example"}, {"path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/quadratic-inequality-example-2/", "id": "YS_3XRj74oo", "title": "Quadratic inequality example 2", "kind": "Video", "slug": "quadratic-inequality-example-2"}, {"path": "khan/math/algebra2/functions-and-graphs/one-variable-modeling/modeling-with-one-variable-equations-and-inequalities/", "id": "modeling-with-one-variable-equations-and-inequalities", "title": "Modeling with one-variable equations and inequalities", "slug": "modeling-with-one-variable-equations-and-inequalities", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Now that you know how to solve linear, quadratic and exponential equations, we'll apply these incredible skills to a wide-range of real-world (and sometimes not-so-real-world) situations.", "node_slug": "one-variable-modeling", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/functions-and-graphs/one-variable-modeling", "extended_slug": "math/algebra2/functions-and-graphs/one-variable-modeling", "kind": "Topic", "slug": "one-variable-modeling"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/functions-and-graphs/undefined_indeterminate/", "id": "undefined_indeterminate", "hide": false, "title": "Undefined and indeterminate answers", "child_data": [{"kind": "Video", "id": "871510490"}, {"kind": "Video", "id": "871532281"}, {"kind": "Video", "id": "871539458"}], "children": [{"path": "khan/math/algebra2/functions-and-graphs/undefined_indeterminate/why-dividing-by-zero-is-undefined/", "id": "SQzjzStU1RQ", "title": "Why dividing by zero is undefined", "kind": "Video", "slug": "why-dividing-by-zero-is-undefined"}, {"path": "khan/math/algebra2/functions-and-graphs/undefined_indeterminate/why-zero-divided-by-zero-is-undefined-indeterminate/", "id": "PDReqvXfkBA", "title": "Why zero divided by zero is undefined/indeterminate", "kind": "Video", "description": "Multiple arguments for what we could get when we divide zero by zero. We will later see that this can be considered indeterminate", "slug": "why-zero-divided-by-zero-is-undefined-indeterminate"}, {"path": "khan/math/algebra2/functions-and-graphs/undefined_indeterminate/undefined-and-indeterminate/", "id": "lHdlHTsXbZg", "title": "Undefined and indeterminate", "kind": "Video", "description": "Why 0/0 is considered to be indeterminate", "slug": "undefined-and-indeterminate"}], "in_knowledge_map": false, "description": "In second grade you may have raised your hand in class and asked what you get when you divide by zero. The answer was probably \"it's not defined.\" In this tutorial we'll explore what that (and \"indeterminate\") means and why the math world has left this gap in arithmetic. (They could define something divided by 0 as 7 or 9 or 119.57 but have decided not to.)", "node_slug": "undefined_indeterminate", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/functions-and-graphs/undefined_indeterminate", "extended_slug": "math/algebra2/functions-and-graphs/undefined_indeterminate", "kind": "Topic", "slug": "undefined_indeterminate"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/functions-and-graphs/new_operators/", "id": "new_operators", "hide": false, "title": "New operator definitions", "child_data": [{"kind": "Video", "id": "185730830"}, {"kind": "Exercise", "id": "23890537"}, {"kind": "Video", "id": "1254312875"}, {"kind": "Exercise", "id": "23890539"}], "children": [{"path": "khan/math/algebra2/functions-and-graphs/new_operators/new-operator-definitions/", "id": "ND-Bbp_q46s", "title": "New operator definitions", "kind": "Video", "description": "Getting comfortable with evaluating newly defined function operators", "slug": "new-operator-definitions"}, {"path": "khan/math/algebra2/functions-and-graphs/new_operators/new_definitions_1/", "id": "new_definitions_1", "title": "New operator definitions 1", "description": "Given the definition of a new operator, evaluate an expression that contains that operator.", "slug": "new_definitions_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/functions-and-graphs/new_operators/new-definitions-2/", "id": "soUmhhuF08Y", "title": "New operator definitions 2", "kind": "Video", "description": "Worked examples of working with newly defined operators", "slug": "new-definitions-2"}, {"path": "khan/math/algebra2/functions-and-graphs/new_operators/new_definitions_2/", "id": "new_definitions_2", "title": "New operator definitions 2", "description": "Given the definition of 2 new operators, evaluate an expression that contains that operator.", "slug": "new_definitions_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Are you bored of the traditional operators of addition, subtraction, multiplication and division? Do even exponents seem a little run-of-the-mill?\n\nWell in this tutorial, we will--somewhat arbitrarily--define completely new operators and notation (which are essentially new function definitions without the function notation). Not only will this tutorial expand your mind, it could be the basis of a lot of fun at your next dinner party!", "node_slug": "new_operators", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/functions-and-graphs/new_operators", "extended_slug": "math/algebra2/functions-and-graphs/new_operators", "kind": "Topic", "slug": "new_operators"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/functions-and-graphs/mathy-functions/", "id": "mathy-functions", "hide": false, "title": "More mathy functions", "child_data": [{"kind": "Video", "id": "25285"}, {"kind": "Video", "id": "25329"}], "children": [{"path": "khan/math/algebra2/functions-and-graphs/mathy-functions/a-more-formal-understanding-of-functions/", "id": "BQMyeQOLvpg", "title": "A more formal understanding of functions", "kind": "Video", "description": "A more formal understanding of functions", "slug": "a-more-formal-understanding-of-functions"}, {"path": "khan/math/algebra2/functions-and-graphs/mathy-functions/linear-algebra-introduction-to-the-inverse-of-a-function/", "id": "-eAzhBZgq28", "title": "Introduction to the inverse of a function", "kind": "Video", "description": "Introduction to the inverse of a function", "slug": "linear-algebra-introduction-to-the-inverse-of-a-function"}], "in_knowledge_map": false, "description": "In this tutorial, we'll start to use and define functions in more \"mathy\" or formal ways.", "node_slug": "mathy-functions", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/functions-and-graphs/mathy-functions", "extended_slug": "math/algebra2/functions-and-graphs/mathy-functions", "kind": "Topic", "slug": "mathy-functions"}], "in_knowledge_map": false, "description": "Revisiting what a function is and how we can define and visualize one.", "node_slug": "functions-and-graphs", "render_type": "Topic", "topic_page_url": "/math/algebra2/functions-and-graphs", "extended_slug": "math/algebra2/functions-and-graphs", "kind": "Topic", "slug": "functions-and-graphs"}, {"icon_src": "/images/power-mode/badges/complex-numbers-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/complex-numbers-a2/", "id": "complex-numbers-a2", "hide": false, "title": "Imaginary and complex numbers", "child_data": [{"kind": "Topic", "id": "x8090d546"}, {"kind": "Topic", "id": "x4d2f17e6"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/complex-numbers-a2/imaginary_unit_i-a2/", "id": "imaginary_unit_i-a2", "hide": false, "title": "The imaginary unit i", "child_data": [{"kind": "Video", "id": "145918385"}, {"kind": "Video", "id": "145918384"}, {"kind": "Exercise", "id": "523254889"}, {"kind": "Video", "id": "150088079"}, {"kind": "Video", "id": "148079183"}], "children": [{"path": "khan/math/algebra2/complex-numbers-a2/imaginary_unit_i-a2/introduction-to-i-and-imaginary-numbers/", "id": "ysVcAYo7UPI", "title": "Introduction to i and imaginary numbers", "kind": "Video", "description": "Introduction to i and imaginary numbers", "slug": "introduction-to-i-and-imaginary-numbers"}, {"path": "khan/math/algebra2/complex-numbers-a2/imaginary_unit_i-a2/calculating-i-raised-to-arbitrary-exponents/", "id": "QiwfF83NWNA", "title": "Calculating i raised to arbitrary exponents", "kind": "Video", "description": "Calculating i raised to arbitrarily high exponents", "slug": "calculating-i-raised-to-arbitrary-exponents"}, {"path": "khan/math/algebra2/complex-numbers-a2/imaginary_unit_i-a2/imaginary_unit_powers/", "id": "imaginary_unit_powers", "title": "Imaginary unit powers", "description": "Solve problems with base i (square root of -1) raised to a positive exponent", "slug": "imaginary_unit_powers", "kind": "Exercise"}, {"path": "khan/math/algebra2/complex-numbers-a2/imaginary_unit_i-a2/imaginary-roots-of-negative-numbers/", "id": "s03qez-6JMA", "title": "Imaginary roots of negative numbers", "kind": "Video", "description": "Imaginary Roots of Negative Numbers", "slug": "imaginary-roots-of-negative-numbers"}, {"path": "khan/math/algebra2/complex-numbers-a2/imaginary_unit_i-a2/i-as-the-principal-root-of-1-a-little-technical/", "id": "rYG1D5lUE4I", "title": "i as the principal root of -1 (a little technical)", "kind": "Video", "description": "i as the principal square root of -1", "slug": "i-as-the-principal-root-of-1-a-little-technical"}], "in_knowledge_map": false, "description": "This is where math starts to get really cool. It may see strange to define a number whose square is negative one. Why do we do this? Because it fits a nice niche in the math ecosystem and can be used to solve problems in engineering and science (not to mention some of the coolest fractals are based on imaginary and complex numbers). The more you think about it, you might realize that all numbers, not just i, are very abstract.", "node_slug": "imaginary_unit_i-a2", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/complex-numbers-a2/imaginary_unit_i-a2", "extended_slug": "math/algebra2/complex-numbers-a2/imaginary_unit_i-a2", "kind": "Topic", "slug": "imaginary_unit_i-a2"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/", "id": "complex_numbers", "hide": false, "title": "Complex numbers", "child_data": [{"kind": "Video", "id": "xc316d3f4"}, {"kind": "Exercise", "id": "xdb649a85"}, {"kind": "Video", "id": "x21268ed3"}, {"kind": "Exercise", "id": "523235921"}, {"kind": "Video", "id": "150088080"}, {"kind": "Video", "id": "150088077"}, {"kind": "Exercise", "id": "523319125"}, {"kind": "Video", "id": "150088076"}, {"kind": "Exercise", "id": "523337087"}, {"kind": "Video", "id": "150088078"}, {"kind": "Video", "id": "150088083"}, {"kind": "Exercise", "id": "523311311"}, {"kind": "Video", "id": "x49eee15a"}, {"kind": "Exercise", "id": "523341553"}, {"kind": "Separator", "id": "_separator"}, {"kind": "Video", "id": "150088081"}, {"kind": "Video", "id": "24406"}], "children": [{"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/introduction-to-complex-numbers/", "id": "A_ESfuN1Pkg", "title": "Introduction to complex numbers", "kind": "Video", "slug": "introduction-to-complex-numbers"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/the-imaginary-unit-and-complex-numbers/", "id": "the-imaginary-unit-and-complex-numbers", "title": "The imaginary unit and complex numbers", "slug": "the-imaginary-unit-and-complex-numbers", "kind": "Exercise"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/plotting-complex-numbers-on-the-complex-plane/", "id": "kGzXIbauGQk", "title": "Plotting complex numbers on the complex plane", "kind": "Video", "slug": "plotting-complex-numbers-on-the-complex-plane"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/the_complex_plane/", "id": "the_complex_plane", "title": "The complex plane", "description": "Plot complex numbers on the complex plane.", "slug": "the_complex_plane", "kind": "Exercise"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/adding-complex-numbers/", "id": "SfbjqVyQljk", "title": "Adding complex numbers", "kind": "Video", "description": "Adding Complex Numbers", "slug": "adding-complex-numbers"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/subtracting-complex-numbers/", "id": "tvXRaZbIjO8", "title": "Subtracting complex numbers", "kind": "Video", "description": "Subtracting Complex Numbers", "slug": "subtracting-complex-numbers"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/adding_and_subtracting_complex_numbers/", "id": "adding_and_subtracting_complex_numbers", "title": "Adding and subtracting complex numbers", "slug": "adding_and_subtracting_complex_numbers", "kind": "Exercise"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/multiplying-complex-numbers/", "id": "cWn6g8Qqvs4", "title": "Multiplying complex numbers", "kind": "Video", "description": "Multiplying Complex Numbers", "slug": "multiplying-complex-numbers"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/multiplying_complex_numbers/", "id": "multiplying_complex_numbers", "title": "Multiplying complex numbers", "slug": "multiplying_complex_numbers", "kind": "Exercise"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/complex-conjugates-example/", "id": "dbxJ6LD0344", "title": "Complex conjugates example", "kind": "Video", "description": "Complex Conjugates", "slug": "complex-conjugates-example"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/dividing-complex-numbers/", "id": "Z8j5RDOibV4", "title": "Dividing complex numbers", "kind": "Video", "description": "Dividing Complex Numbers", "slug": "dividing-complex-numbers"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/dividing_complex_numbers/", "id": "dividing_complex_numbers", "title": "Dividing complex numbers", "slug": "dividing_complex_numbers", "kind": "Exercise"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/absolute-value-of-a-complex-number/", "id": "yvzyC4VBpUU", "title": "Absolute value of a complex number", "kind": "Video", "slug": "absolute-value-of-a-complex-number"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/absolute_value_of_complex_numbers/", "id": "absolute_value_of_complex_numbers", "title": "Absolute value of complex numbers", "description": "Find the absolute value of a complex number.", "slug": "absolute_value_of_complex_numbers", "kind": "Exercise"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/complex-roots-from-the-quadratic-formula/", "id": "dnjK4DPqh0k", "title": "Example: Complex roots for a quadratic", "kind": "Video", "description": "Complex Roots from the Quadratic Formula", "slug": "complex-roots-from-the-quadratic-formula"}, {"path": "khan/math/algebra2/complex-numbers-a2/complex_numbers/algebra-ii-imaginary-and-complex-numbers/", "id": "C-2Ln0pK3kY", "title": "Algebra II: Imaginary and complex numbers", "kind": "Video", "description": "21-26, mostly imaginary and complex numbers", "slug": "algebra-ii-imaginary-and-complex-numbers"}], "in_knowledge_map": false, "description": "Let's start constructing numbers that have both a real and imaginary part. We'll call them complex. We can even plot them on the complex plane and use them to find the roots of ANY quadratic equation. The fun must not stop!", "node_slug": "complex_numbers", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/complex-numbers-a2/complex_numbers", "extended_slug": "math/algebra2/complex-numbers-a2/complex_numbers", "kind": "Topic", "slug": "complex_numbers"}], "in_knowledge_map": false, "description": "Understanding and solving equations with imaginary numbers.", "node_slug": "complex-numbers-a2", "render_type": "Topic", "topic_page_url": "/math/algebra2/complex-numbers-a2", "extended_slug": "math/algebra2/complex-numbers-a2", "kind": "Topic", "slug": "complex-numbers-a2"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/conics_precalc/", "id": "conics_precalc", "hide": false, "title": "Conic sections", "child_data": [{"kind": "Topic", "id": "x2bb70a03"}, {"kind": "Topic", "id": "xa18dedac"}, {"kind": "Topic", "id": "xecf1aaff"}, {"kind": "Topic", "id": "xca430dfa"}, {"kind": "Topic", "id": "xfeacc6d7"}, {"kind": "Topic", "id": "x9f792397"}, {"kind": "Topic", "id": "x24211e68"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/conics_precalc/conic_section_intro/", "id": "conic_section_intro", "hide": false, "title": "Conic section basics", "child_data": [{"kind": "Video", "id": "23522"}, {"kind": "Exercise", "id": "213271375"}], "children": [{"path": "khan/math/algebra2/conics_precalc/conic_section_intro/introduction-to-conic-sections/", "id": "0A7RR0oy2ho", "title": "Introduction to conic sections", "kind": "Video", "description": "What are conic sections and why are they called \"conic sections\"?", "slug": "introduction-to-conic-sections"}, {"path": "khan/math/algebra2/conics_precalc/conic_section_intro/recognizing_conic_sections/", "id": "recognizing_conic_sections", "title": "Recognizing conic sections", "description": "Determine if the graph of a conic section shows a circle, hyperbola, parabola, or ellipse.", "slug": "recognizing_conic_sections", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What is a conic other than a jazz singer from New Orleans? Well, as you'll see in this tutorial, a conic section is formed when you intersect a plane with cones. You end up with some familiar shapes (like circles and ellipses) and some that are a bit unexpected (like hyperbolas). This tutorial gets you set up with the basics and is a good foundation for going deeper into the world of conic sections.", "node_slug": "conic_section_intro", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/conics_precalc/conic_section_intro", "extended_slug": "math/algebra2/conics_precalc/conic_section_intro", "kind": "Topic", "slug": "conic_section_intro"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/conics_precalc/circles-tutorial-precalc/", "id": "circles-tutorial-precalc", "hide": false, "title": "Circles", "child_data": [{"kind": "Exercise", "id": "xfe85ab0d"}, {"kind": "Video", "id": "xca06c2ed"}, {"kind": "Exercise", "id": "196139891"}, {"kind": "Exercise", "id": "1080859355"}, {"kind": "Video", "id": "x577fb2f2"}, {"kind": "Exercise", "id": "196157133"}, {"kind": "Exercise", "id": "1080890293"}], "children": [{"path": "khan/math/algebra2/conics_precalc/circles-tutorial-precalc/pythagorean-theorem-and-the-equation-of-a-circle/", "id": "pythagorean-theorem-and-the-equation-of-a-circle", "title": "Pythagorean theorem and the equation of a circle", "slug": "pythagorean-theorem-and-the-equation-of-a-circle", "kind": "Exercise"}, {"path": "khan/math/algebra2/conics_precalc/circles-tutorial-precalc/radius-and-center-for-a-circle-equation-in-standard-form/", "id": "JvDpYlyKkNU", "title": "Radius and center for a circle equation in standard form", "kind": "Video", "slug": "radius-and-center-for-a-circle-equation-in-standard-form"}, {"path": "khan/math/algebra2/conics_precalc/circles-tutorial-precalc/equation_of_a_circle_1/", "id": "equation_of_a_circle_1", "title": "Equation of a circle in factored form", "description": "Find the center and radius of a circle given the equation in factored form.", "slug": "equation_of_a_circle_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/conics_precalc/circles-tutorial-precalc/graphing_circles/", "id": "graphing_circles", "title": "Graphing circles", "description": "Graph circles from equations in standard form", "slug": "graphing_circles", "kind": "Exercise"}, {"path": "khan/math/algebra2/conics_precalc/circles-tutorial-precalc/completing-the-square-to-write-equation-in-standard-form-of-a-circle/", "id": "XyDMsotfJhE", "title": "Completing the square to write equation in standard form of a circle", "kind": "Video", "slug": "completing-the-square-to-write-equation-in-standard-form-of-a-circle"}, {"path": "khan/math/algebra2/conics_precalc/circles-tutorial-precalc/equation_of_a_circle_2/", "id": "equation_of_a_circle_2", "title": "Equation of a circle in non-factored form", "description": "Find the center and radius of a circle given the equation in unfactored form.", "slug": "equation_of_a_circle_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/conics_precalc/circles-tutorial-precalc/graphing_circles_2/", "id": "graphing_circles_2", "title": "Graphing circles 2", "description": "Graph circles from equations in general form", "slug": "graphing_circles_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You've seen circles your entire life. You've even studied them a bit in math class. Now we go further, taking a deep look at the equations of circles.", "node_slug": "circles-tutorial-precalc", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/conics_precalc/circles-tutorial-precalc", "extended_slug": "math/algebra2/conics_precalc/circles-tutorial-precalc", "kind": "Topic", "slug": "circles-tutorial-precalc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/conics_precalc/ellipses-precalc/", "id": "ellipses-precalc", "hide": false, "title": "Ellipses", "child_data": [{"kind": "Video", "id": "23526"}, {"kind": "Exercise", "id": "213284163"}, {"kind": "Video", "id": "23540"}, {"kind": "Video", "id": "x04fed265"}, {"kind": "Exercise", "id": "x32143ad5"}], "children": [{"path": "khan/math/algebra2/conics_precalc/ellipses-precalc/conic-sections-intro-to-ellipses/", "id": "lvAYFUIEpFI", "title": "Conic sections: Intro to ellipses", "kind": "Video", "description": "Introduction to the ellipse.", "slug": "conic-sections-intro-to-ellipses"}, {"path": "khan/math/algebra2/conics_precalc/ellipses-precalc/equation_of_an_ellipse/", "id": "equation_of_an_ellipse", "title": "Equation of an ellipse", "description": "Find the center and major and minor radius of an ellipse given its equation.", "slug": "equation_of_an_ellipse", "kind": "Exercise"}, {"path": "khan/math/algebra2/conics_precalc/ellipses-precalc/foci-of-an-ellipse/", "id": "QR2vxfwiHAU", "title": "Foci of an ellipse", "kind": "Video", "description": "Calculating the foci (or focuses) of an Ellipse.", "slug": "foci-of-an-ellipse"}, {"path": "khan/math/algebra2/conics_precalc/ellipses-precalc/ellipse-focus-intuition-exercise/", "id": "cJnNMT-F-BI", "title": "Ellipse focus intuition exercise", "kind": "Video", "description": "Ellipse focus intuition exercise", "slug": "ellipse-focus-intuition-exercise"}, {"path": "khan/math/algebra2/conics_precalc/ellipses-precalc/ellipse_intuition/", "id": "ellipse_intuition", "title": "Exploring the foci of an ellipse", "slug": "ellipse_intuition", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What would you call a circle that isn't a circle? One that is is is taller or fatter rather than being perfectly round? An ellipse. (All circles are special cases of ellipses.)\n\nIn this tutorial we go deep into the equations and graphs of ellipses.", "node_slug": "ellipses-precalc", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/conics_precalc/ellipses-precalc", "extended_slug": "math/algebra2/conics_precalc/ellipses-precalc", "kind": "Topic", "slug": "ellipses-precalc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/conics_precalc/parabolas_precalc/", "id": "parabolas_precalc", "hide": false, "title": "Parabolas", "child_data": [{"kind": "Video", "id": "x45ecfbb1"}, {"kind": "Exercise", "id": "257422323"}, {"kind": "Video", "id": "x0abb5ff2"}, {"kind": "Video", "id": "x2dc2107e"}, {"kind": "Video", "id": "xf4347fc5"}, {"kind": "Video", "id": "x009570c6"}, {"kind": "Exercise", "id": "257436637"}, {"kind": "Exercise", "id": "310321303"}], "children": [{"path": "khan/math/algebra2/conics_precalc/parabolas_precalc/parabola-intuition-example-1/", "id": "Qv2pgv8ea-k", "title": "Parabola intuition example 1", "kind": "Video", "slug": "parabola-intuition-example-1"}, {"path": "khan/math/algebra2/conics_precalc/parabolas_precalc/parabola_intuition_1/", "id": "parabola_intuition_1", "title": "Parabola intuition 1", "description": "Make one parabola overlap with another by adjusting the leading coefficient and vertex coordinates.", "slug": "parabola_intuition_1", "kind": "Exercise"}, {"path": "khan/math/algebra2/conics_precalc/parabolas_precalc/focus-and-directrix-introduction/", "id": "pe8Dm_FUpdU", "title": "Focus and directrix introduction", "kind": "Video", "slug": "focus-and-directrix-introduction"}, {"path": "khan/math/algebra2/conics_precalc/parabolas_precalc/using-the-focus-and-directrix-to-find-the-equation-of-a-parabola/", "id": "XwtyQsCLnEE", "title": "Using the focus and directrix to find the equation of a parabola", "kind": "Video", "slug": "using-the-focus-and-directrix-to-find-the-equation-of-a-parabola"}, {"path": "khan/math/algebra2/conics_precalc/parabolas_precalc/equation-for-parabola-from-focus-and-directrix/", "id": "okXVhDMuGFg", "title": "Equation for parabola from focus and directrix", "kind": "Video", "slug": "equation-for-parabola-from-focus-and-directrix"}, {"path": "khan/math/algebra2/conics_precalc/parabolas_precalc/finding-focus-and-directrix-from-vertex/", "id": "w56Vuf9tHfA", "title": "Finding focus and directrix from vertex", "kind": "Video", "slug": "finding-focus-and-directrix-from-vertex"}, {"path": "khan/math/algebra2/conics_precalc/parabolas_precalc/parabola_intuition_2/", "id": "parabola_intuition_2", "title": "Parabola intuition 2", "description": "Make one parabola overlap with another by adjusting the focus coordinates and directrix.", "slug": "parabola_intuition_2", "kind": "Exercise"}, {"path": "khan/math/algebra2/conics_precalc/parabolas_precalc/parabola_intuition_3/", "id": "parabola_intuition_3", "title": "Parabola intuition 3", "description": "Make one parabola overlap with another by adjusting the focus coordinates and directrix. Find the equation of the parabola.", "slug": "parabola_intuition_3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You've seen parabolas already when you graphed quadratic functions. Now we will look at them from a conic perspective. In particular we will look at them as the set of all points equidistant from a point (focus) and a line (directrix). Have fun!", "node_slug": "parabolas_precalc", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/conics_precalc/parabolas_precalc", "extended_slug": "math/algebra2/conics_precalc/parabolas_precalc", "kind": "Topic", "slug": "parabolas_precalc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/conics_precalc/hyperbolas-precalc/", "id": "hyperbolas-precalc", "hide": false, "title": "Hyperbolas", "child_data": [{"kind": "Video", "id": "23528"}, {"kind": "Video", "id": "23530"}, {"kind": "Video", "id": "23532"}, {"kind": "Exercise", "id": "213250823"}, {"kind": "Video", "id": "23542"}, {"kind": "Video", "id": "23544"}], "children": [{"path": "khan/math/algebra2/conics_precalc/hyperbolas-precalc/conic-sections-intro-to-hyperbolas/", "id": "pzSyOTkAsY4", "title": "Conic sections: Intro to hyperbolas", "kind": "Video", "description": "Introduction to the hyperbola", "slug": "conic-sections-intro-to-hyperbolas"}, {"path": "khan/math/algebra2/conics_precalc/hyperbolas-precalc/conic-sections-hyperbolas-2/", "id": "hl58vTCqVIY", "title": "Conic sections: Hyperbolas 2", "kind": "Video", "description": "Continuation of the intro to hyperbolas", "slug": "conic-sections-hyperbolas-2"}, {"path": "khan/math/algebra2/conics_precalc/hyperbolas-precalc/conic-sections-hyperbolas-3/", "id": "lGQw-W1PxBE", "title": "Conic sections: Hyperbolas 3", "kind": "Video", "description": "Part 3 of the intro to hyperbolas", "slug": "conic-sections-hyperbolas-3"}, {"path": "khan/math/algebra2/conics_precalc/hyperbolas-precalc/equation_of_a_hyperbola/", "id": "equation_of_a_hyperbola", "title": "Asymptotes of a hyperbola", "description": "Find the asymptotes of a hyperbola based on the equation.", "slug": "equation_of_a_hyperbola", "kind": "Exercise"}, {"path": "khan/math/algebra2/conics_precalc/hyperbolas-precalc/foci-of-a-hyperbola/", "id": "S0Fd2Tg2v7M", "title": "Foci of a hyperbola", "kind": "Video", "description": "Introduction to the foci (focuses) of a hyperbola", "slug": "foci-of-a-hyperbola"}, {"path": "khan/math/algebra2/conics_precalc/hyperbolas-precalc/proof-hyperbola-foci/", "id": "HPRFmu7JsKU", "title": "Proof: Hyperbola foci", "kind": "Video", "description": "Proof of the hyperbola foci formula", "slug": "proof-hyperbola-foci"}], "in_knowledge_map": false, "description": "It is no hyperbole to say that hyperbolas are awesome. In this tutorial, we look closely at this wacky conic section. We pay special attention to its graph and equation.", "node_slug": "hyperbolas-precalc", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/conics_precalc/hyperbolas-precalc", "extended_slug": "math/algebra2/conics_precalc/hyperbolas-precalc", "kind": "Topic", "slug": "hyperbolas-precalc"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/conics_precalc/conics_precalc_eqs/", "id": "conics_precalc_eqs", "hide": false, "title": "Conics from equations", "child_data": [{"kind": "Video", "id": "23534"}, {"kind": "Video", "id": "23536"}, {"kind": "Video", "id": "23538"}, {"kind": "Video", "id": "24414"}], "children": [{"path": "khan/math/algebra2/conics_precalc/conics_precalc_eqs/identifying-conics-1/", "id": "LSJuu4Qm2qQ", "title": "Identifying an ellipse from equation", "kind": "Video", "description": "Part 1 of identifying and graphic conic sections", "slug": "identifying-conics-1"}, {"path": "khan/math/algebra2/conics_precalc/conics_precalc_eqs/identifying-conics-2/", "id": "cvA4VN1dpuY", "title": "Identifying a hyperbola from an equation", "kind": "Video", "description": "Part 2 of identifying and graphing conic sections", "slug": "identifying-conics-2"}, {"path": "khan/math/algebra2/conics_precalc/conics_precalc_eqs/conic-identification-3/", "id": "Dru0RHgfp2g", "title": "Identifying circles and parabolas from equations", "kind": "Video", "description": "Let's identify (and graph) a couple of more conics!", "slug": "conic-identification-3"}, {"path": "khan/math/algebra2/conics_precalc/conics_precalc_eqs/algebra-conic-sections/", "id": "74oju-0NExU", "title": "Hyperbola and parabola examples", "kind": "Video", "description": "Parabola, Hyperbolas, etc.", "slug": "algebra-conic-sections"}], "in_knowledge_map": false, "description": "You're familiar with the graphs and equations of all of the conic sections. Now you want practice identifying them given only their equations. You, my friend, are about to click on exactly the right tutorial.", "node_slug": "conics_precalc_eqs", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/conics_precalc/conics_precalc_eqs", "extended_slug": "math/algebra2/conics_precalc/conics_precalc_eqs", "kind": "Topic", "slug": "conics_precalc_eqs"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/algebra2/conics_precalc/jee_hyperbolas/", "id": "jee_hyperbolas", "hide": false, "title": "Conics in the IIT JEE", "child_data": [{"kind": "Video", "id": "8187463"}, {"kind": "Video", "id": "8187454"}, {"kind": "Video", "id": "8187455"}, {"kind": "Video", "id": "8187456"}, {"kind": "Video", "id": "8187457"}, {"kind": "Video", "id": "8187458"}, {"kind": "Video", "id": "8187453"}], "children": [{"path": "khan/math/algebra2/conics_precalc/jee_hyperbolas/tangent-line-hyperbola-relationship-very-optional/", "id": "c_8QQbVQKU0", "title": "Tangent line hyperbola relationship (very optional)", "kind": "Video", "description": "How a tangent line relates to a hyperbola. Might be useful for some competitive exams where there isn't time to derive (like we are doing in this video)", "slug": "tangent-line-hyperbola-relationship-very-optional"}, {"path": "khan/math/algebra2/conics_precalc/jee_hyperbolas/iit-jee-circle-hyperbola-common-tangent-part-1/", "id": "MhLfun2Vask", "title": "IIT JEE circle hyperbola common tangent part 1", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tan", "slug": "iit-jee-circle-hyperbola-common-tangent-part-1"}, {"path": "khan/math/algebra2/conics_precalc/jee_hyperbolas/iit-jee-circle-hyperbola-common-tangent-part-2/", "id": "0imeUgSxR10", "title": "IIT JEE circle hyperbola common tangent part 2", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 2", "slug": "iit-jee-circle-hyperbola-common-tangent-part-2"}, {"path": "khan/math/algebra2/conics_precalc/jee_hyperbolas/iit-jee-circle-hyperbola-common-tangent-part-3/", "id": "RomnHMWSLoE", "title": "IIT JEE circle hyperbola common tangent part 3", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 3", "slug": "iit-jee-circle-hyperbola-common-tangent-part-3"}, {"path": "khan/math/algebra2/conics_precalc/jee_hyperbolas/iit-jee-circle-hyperbola-common-tangent-part-4/", "id": "eGo8C2Jshzs", "title": "IIT JEE circle hyperbola common tangent part 4", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 4", "slug": "iit-jee-circle-hyperbola-common-tangent-part-4"}, {"path": "khan/math/algebra2/conics_precalc/jee_hyperbolas/iit-jee-circle-hyperbola-common-tangent-part-5/", "id": "rPoqpQcgNv4", "title": "IIT JEE circle hyperbola common tangent part 5", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 5", "slug": "iit-jee-circle-hyperbola-common-tangent-part-5"}, {"path": "khan/math/algebra2/conics_precalc/jee_hyperbolas/iit-jee-circle-hyperbola-intersection/", "id": "6g3DPg2HqGw", "title": "IIT JEE circle hyperbola intersection", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 46 Circle Hyperbola Intersection", "slug": "iit-jee-circle-hyperbola-intersection"}], "in_knowledge_map": false, "description": "Do you think that the math exams that you have to take are hard? Well, if you have the stomach, try the problem(s) in this tutorial. They are not only conceptually difficult, but they are also hairy.\n\nDon't worry if you have trouble with this. Most of us would. The IIT JEE is an exam administered to 200,000 students every year in India to select which 2000 go to the competitive IITs. They need to make sure that most of the students can't do most of the problems so that they can really whittle the applicants down.", "node_slug": "jee_hyperbolas", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/conics_precalc/jee_hyperbolas", "extended_slug": "math/algebra2/conics_precalc/jee_hyperbolas", "kind": "Topic", "slug": "jee_hyperbolas"}], "in_knowledge_map": false, "description": "A detailed look at shapes that are prevalent in science: conic sections", "node_slug": "conics_precalc", "render_type": "Topic", "topic_page_url": "/math/algebra2/conics_precalc", "extended_slug": "math/algebra2/conics_precalc", "kind": "Topic", "slug": "conics_precalc"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/algebra2/alg2-matrices/", "id": "alg2-matrices", "hide": false, "title": "Matrices", "child_data": [{"kind": "Topic", "id": "x1fbb46ca"}, {"kind": "Topic", "id": "xdf1c7f4b"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/", "id": "basic-matrix-operations-alg2", "hide": false, "title": "Basic matrix operations", "child_data": [{"kind": "Video", "id": "1400915680"}, {"kind": "Exercise", "id": "1106162193"}, {"kind": "Video", "id": "xf6a9994c"}, {"kind": "Exercise", "id": "x6d086361"}, {"kind": "Video", "id": "1400835599"}, {"kind": "Exercise", "id": "1105859514"}, {"kind": "Video", "id": "1401149467"}, {"kind": "Exercise", "id": "1106067541"}, {"kind": "Video", "id": "1401091052"}, {"kind": "Exercise", "id": "1283220979"}], "children": [{"path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/introduction-to-the-matrix/", "id": "0oGJTQCy4cQ", "title": "Introduction to the matrix", "kind": "Video", "slug": "introduction-to-the-matrix"}, {"path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/matrix_dimensions/", "id": "matrix_dimensions", "title": "Matrix dimensions", "description": "Identify the dimensions of a matrix", "slug": "matrix_dimensions", "kind": "Exercise"}, {"path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/data-in-matrices/", "id": "PPOIlLhsT6s", "title": "Representing data with matrices", "kind": "Video", "slug": "data-in-matrices"}, {"path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/representing-relationships-with-matrices/", "id": "representing-relationships-with-matrices", "title": "Representing relationships with matrices", "slug": "representing-relationships-with-matrices", "kind": "Exercise"}, {"path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/scalar-multiplication/", "id": "TbaltFbJ3wE", "title": "Scalar multiplication", "kind": "Video", "slug": "scalar-multiplication"}, {"path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/scalar_matrix_multiplication/", "id": "scalar_matrix_multiplication", "title": "Scalar matrix multiplication", "description": "Multiply a matrix by a scalar", "slug": "scalar_matrix_multiplication", "kind": "Exercise"}, {"path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/matrix-addition-and-subtraction-1/", "id": "WR9qCSXJlyY", "title": "Matrix addition and subtraction", "kind": "Video", "slug": "matrix-addition-and-subtraction-1"}, {"path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/matrix_addition_and_subtraction/", "id": "matrix_addition_and_subtraction", "title": "Matrix addition and subtraction", "description": "Add and subtract matrices", "slug": "matrix_addition_and_subtraction", "kind": "Exercise"}, {"path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/transpose-of-a-matrix/", "id": "TZrKrNVhbjI", "title": "Transpose of a matrix", "kind": "Video", "slug": "transpose-of-a-matrix"}, {"path": "khan/math/algebra2/alg2-matrices/basic-matrix-operations-alg2/matrix_transpose/", "id": "matrix_transpose", "title": "Matrix transpose", "description": "Transpose a matrix", "slug": "matrix_transpose", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Keanu Reeves' virtual world in the The Matrix (I guess we can call all three movies \"The Matrices\") have more in common with this tutorial than you might suspect. Matrices are ways of organizing numbers. They are used extensively in computer graphics, simulations and information processing in general. The super-intelligent artificial intelligences that created The Matrix for Keanu must have used many matrices in the process.\n\nThis tutorial introduces you to what a matrix is and how we define some basic operations on them.", "node_slug": "basic-matrix-operations-alg2", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/alg2-matrices/basic-matrix-operations-alg2", "extended_slug": "math/algebra2/alg2-matrices/basic-matrix-operations-alg2", "kind": "Topic", "slug": "basic-matrix-operations-alg2"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/algebra2/alg2-matrices/matrix-multiplication-alg2/", "id": "matrix-multiplication-alg2", "hide": false, "title": "Matrix multiplication", "child_data": [{"kind": "Video", "id": "xe9bce422"}, {"kind": "Video", "id": "x07e01747"}, {"kind": "Exercise", "id": "1106173190"}, {"kind": "Video", "id": "x044ecd2f"}, {"kind": "Exercise", "id": "1106113431"}], "children": [{"path": "khan/math/algebra2/alg2-matrices/matrix-multiplication-alg2/matrix-multiplication-intro/", "id": "kT4Mp9EdVqs", "title": "Matrix multiplication introduction", "kind": "Video", "slug": "matrix-multiplication-intro"}, {"path": "khan/math/algebra2/alg2-matrices/matrix-multiplication-alg2/multiplying-a-matrix-by-a-matrix/", "id": "OMA2Mwo0aZg", "title": "Multiplying a matrix by a matrix", "kind": "Video", "slug": "multiplying-a-matrix-by-a-matrix"}, {"path": "khan/math/algebra2/alg2-matrices/matrix-multiplication-alg2/multiplying_a_matrix_by_a_matrix/", "id": "multiplying_a_matrix_by_a_matrix", "title": "Multiplying a matrix by a matrix", "description": "Multiply two matrices", "slug": "multiplying_a_matrix_by_a_matrix", "kind": "Exercise"}, {"path": "khan/math/algebra2/alg2-matrices/matrix-multiplication-alg2/defined-and-undefined-matrix-operations/", "id": "O1-9f1g0OsI", "title": "Defined and undefined matrix operations", "kind": "Video", "slug": "defined-and-undefined-matrix-operations"}, {"path": "khan/math/algebra2/alg2-matrices/matrix-multiplication-alg2/defined_and_undefined_matrix_operations/", "id": "defined_and_undefined_matrix_operations", "title": "Defined and undefined matrix operations", "description": "Determine whether the addition, subtraction, or multiplication of two matrices is defined", "slug": "defined_and_undefined_matrix_operations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You know what a matrix is, how to add them and multiply them by a scalar. Now we'll define multiplying one matrix by another matrix. The process may seem bizarre at first (and maybe even a little longer than that), but there is a certain naturalness to the process. When you study more advanced linear algebra and computer science, it has tons of applications (computer graphics, simulations, etc.)", "node_slug": "matrix-multiplication-alg2", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/alg2-matrices/matrix-multiplication-alg2", "extended_slug": "math/algebra2/alg2-matrices/matrix-multiplication-alg2", "kind": "Topic", "slug": "matrix-multiplication-alg2"}], "in_knowledge_map": false, "description": "", "node_slug": "alg2-matrices", "render_type": "Topic", "topic_page_url": "/math/algebra2/alg2-matrices", "extended_slug": "math/algebra2/alg2-matrices", "kind": "Topic", "slug": "alg2-matrices"}, {"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/math/algebra2/algebra-ii-miscellaneous/", "id": "algebra-ii-miscellaneous", "hide": false, "title": "Miscellaneous", "child_data": [{"kind": "Topic", "id": "xa42f8970"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/math/algebra2/algebra-ii-miscellaneous/alg-ii-readiness-warmup/", "id": "alg-ii-readiness-warmup", "hide": false, "title": "Algebra II readiness warmup", "child_data": [{"kind": "Exercise", "id": "xb80fe829"}], "children": [{"path": "khan/math/algebra2/algebra-ii-miscellaneous/alg-ii-readiness-warmup/algebra-ii-warmup/", "id": "algebra-ii-warmup", "title": "Algebra II warmup", "description": "Are you ready to tackle algebra II? Check your understanding of foundational skills with this short quiz.", "slug": "algebra-ii-warmup", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "alg-ii-readiness-warmup", "render_type": "Tutorial", "topic_page_url": "/math/algebra2/algebra-ii-miscellaneous/alg-ii-readiness-warmup", "extended_slug": "math/algebra2/algebra-ii-miscellaneous/alg-ii-readiness-warmup", "kind": "Topic", "slug": "alg-ii-readiness-warmup"}], "in_knowledge_map": false, "description": "", "node_slug": "algebra-ii-miscellaneous", "render_type": "Topic", "topic_page_url": "/math/algebra2/algebra-ii-miscellaneous", "extended_slug": "math/algebra2/algebra-ii-miscellaneous", "kind": "Topic", "slug": "algebra-ii-miscellaneous"}], "in_knowledge_map": false, "description": "Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions...but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you!", "node_slug": "algebra2", "render_type": "Subject", "topic_page_url": "/math/algebra2", "extended_slug": "math/algebra2", "kind": "Topic", "slug": "algebra2"}, {"icon_src": "/images/power-mode/badges/trigonometry-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/trigonometry/", "id": "trigonometry", "hide": false, "title": "Trigonometry", "child_data": [{"kind": "Topic", "id": "x74f9f730"}, {"kind": "Topic", "id": "x36c957e4"}, {"kind": "Topic", "id": "xb1166488"}, {"kind": "Topic", "id": "x6c759222"}, {"kind": "Topic", "id": "xeada9044"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/trigonometry/basic-trigonometry/", "id": "basic-trigonometry", "hide": false, "title": "Basic trigonometry", "child_data": [{"kind": "Topic", "id": "x9b31b14e"}, {"kind": "Topic", "id": "xa51640a3"}, {"kind": "Topic", "id": "xf9ac641a"}, {"kind": "Topic", "id": "x8be384b2"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/basic-trigonometry/basic_trig_ratios/", "id": "basic_trig_ratios", "hide": false, "title": "Basic trigonometric ratios", "child_data": [{"kind": "Video", "id": "19647490"}, {"kind": "Video", "id": "1153704166"}, {"kind": "Exercise", "id": "592471461"}, {"kind": "Video", "id": "19647491"}, {"kind": "Exercise", "id": "3036"}, {"kind": "Exercise", "id": "592442008"}, {"kind": "Video", "id": "1153614407"}, {"kind": "Exercise", "id": "2032"}], "children": [{"path": "khan/math/trigonometry/basic-trigonometry/basic_trig_ratios/basic-trigonometry/", "id": "Jsiy4TxgIME", "title": "The basics of trigonometry", "kind": "Video", "description": "What is trigonometry? Get the answer here.", "slug": "basic-trigonometry"}, {"path": "khan/math/trigonometry/basic-trigonometry/basic_trig_ratios/example-using-soh-cah-toa/", "id": "I3jyBUyjg48", "title": "Example: Using soh cah toa", "kind": "Video", "description": "Worked example evaluating sine and cosine using soh cah toa definition.", "slug": "example-using-soh-cah-toa"}, {"path": "khan/math/trigonometry/basic-trigonometry/basic_trig_ratios/trigonometry_05/", "id": "trigonometry_0.5", "title": "Trigonometry 0.5", "slug": "trigonometry_05", "kind": "Exercise"}, {"path": "khan/math/trigonometry/basic-trigonometry/basic_trig_ratios/basic-trigonometry-ii/", "id": "G-T_6hCdMQc", "title": "Basic trigonometry II", "kind": "Video", "description": "A few more examples using SOH CAH TOA", "slug": "basic-trigonometry-ii"}, {"path": "khan/math/trigonometry/basic-trigonometry/basic_trig_ratios/trigonometry_1/", "id": "trigonometry_1", "title": "Trigonometry 1", "slug": "trigonometry_1", "kind": "Exercise"}, {"path": "khan/math/trigonometry/basic-trigonometry/basic_trig_ratios/trigonometry_15/", "id": "trigonometry_1.5", "title": "Trigonometry 1.5", "slug": "trigonometry_15", "kind": "Exercise"}, {"path": "khan/math/trigonometry/basic-trigonometry/basic_trig_ratios/example-trig-to-solve-the-sides-and-angles-of-a-right-triangle/", "id": "l5VbdqRjTXc", "title": "Example: Trig to solve the sides and angles of a right triangle", "kind": "Video", "description": "Worked example using trigonometry to solve for the lengths of the sides of a right triangle given one of the non-right angles.", "slug": "example-trig-to-solve-the-sides-and-angles-of-a-right-triangle"}, {"path": "khan/math/trigonometry/basic-trigonometry/basic_trig_ratios/trigonometry_2/", "id": "trigonometry_2", "title": "Trigonometry 2", "slug": "trigonometry_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, you will learn all the trigonometry that you are likely to remember in ten years (assuming you are a lazy non-curious, non-lifelong learner). But even in that non-ideal world where you forgot everything else, you'll be able to do more than you might expect with the concentrated knowledge you are about to get.", "node_slug": "basic_trig_ratios", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/basic-trigonometry/basic_trig_ratios", "extended_slug": "math/trigonometry/basic-trigonometry/basic_trig_ratios", "kind": "Topic", "slug": "basic_trig_ratios"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity/", "id": "cc-trig-ratios-similarity", "hide": false, "title": "Trigonometric ratios and similarity", "child_data": [{"kind": "Video", "id": "xc0627a6a"}, {"kind": "Video", "id": "xee258334"}, {"kind": "Video", "id": "x71f71130"}, {"kind": "Video", "id": "x835650f9"}, {"kind": "Video", "id": "x98eb8563"}, {"kind": "Exercise", "id": "x42befb70"}], "children": [{"path": "khan/math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity/similarity-to-define-sine-cosine-and-tangent/", "id": "QuZMXVJNLCo", "title": "Similarity to define sine, cosine, and tangent", "kind": "Video", "slug": "similarity-to-define-sine-cosine-and-tangent"}, {"path": "khan/math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity/sine-and-cosine-of-complements-example/", "id": "yiH6GoscimY", "title": "Sine and cosine of complements example", "kind": "Video", "slug": "sine-and-cosine-of-complements-example"}, {"path": "khan/math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity/showing-relationship-between-cosine-and-sine-of-complements/", "id": "BLQNL_UGONg", "title": "Showing relationship between cosine and sine of complements", "kind": "Video", "slug": "showing-relationship-between-cosine-and-sine-of-complements"}, {"path": "khan/math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity/example-with-trig-functions-and-ratios/", "id": "TugWqiUjOU4", "title": "Example with trig functions and ratios", "kind": "Video", "slug": "example-with-trig-functions-and-ratios"}, {"path": "khan/math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity/example-relating-trig-function-to-side-ratios/", "id": "EBKNtjZAjXg", "title": "Example relating trig function to side ratios", "kind": "Video", "slug": "example-relating-trig-function-to-side-ratios"}, {"path": "khan/math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity/trigonometric-functions-and-side-ratios-in-right-triangles/", "id": "trigonometric-functions-and-side-ratios-in-right-triangles", "title": "Trigonometric functions and side ratios in right triangles", "slug": "trigonometric-functions-and-side-ratios-in-right-triangles", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we will build on our understanding of similarity to get a deeper appreciation for the motivation behind trigonometric ratios and relationships.", "node_slug": "cc-trig-ratios-similarity", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity", "extended_slug": "math/trigonometry/basic-trigonometry/cc-trig-ratios-similarity", "kind": "Topic", "slug": "cc-trig-ratios-similarity"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/basic-trigonometry/trig-application-problems/", "id": "trig-application-problems", "hide": false, "title": "Trig ratio application problems", "child_data": [{"kind": "Video", "id": "xf177c90b"}, {"kind": "Video", "id": "x9a39e2a2"}, {"kind": "Exercise", "id": "xf3c439ef"}, {"kind": "Video", "id": "x9e9d0119"}], "children": [{"path": "khan/math/trigonometry/basic-trigonometry/trig-application-problems/how-much-of-a-pyramid-is-submerged/", "id": "Z5EnuVJawmY", "title": "How much of a pyramid is submerged", "kind": "Video", "slug": "how-much-of-a-pyramid-is-submerged"}, {"path": "khan/math/trigonometry/basic-trigonometry/trig-application-problems/angle-to-aim-to-get-alien/", "id": "aHzd-u35LuA", "title": "Angle to aim to get alien", "kind": "Video", "slug": "angle-to-aim-to-get-alien"}, {"path": "khan/math/trigonometry/basic-trigonometry/trig-application-problems/applying-right-triangles/", "id": "applying-right-triangles", "title": "Applying right triangles", "slug": "applying-right-triangles", "kind": "Exercise"}, {"path": "khan/math/trigonometry/basic-trigonometry/trig-application-problems/figuring-out-coordinate-of-bended-figure-using-trig/", "id": "GZ1ogxruLJM", "title": "Figuring out coordinate of bended figure using trig", "kind": "Video", "slug": "figuring-out-coordinate-of-bended-figure-using-trig"}], "in_knowledge_map": false, "description": "You are now familiar with the basic trig ratios. We'll now use them to solve a whole bunch of real-world problems. Seriously, trig shows up a lot in the real-world.", "node_slug": "trig-application-problems", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/basic-trigonometry/trig-application-problems", "extended_slug": "math/trigonometry/basic-trigonometry/trig-application-problems", "kind": "Topic", "slug": "trig-application-problems"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/basic-trigonometry/reciprocal-trig-functions/", "id": "reciprocal-trig-functions", "hide": false, "title": "Reciprocal trig functions", "child_data": [{"kind": "Video", "id": "1153576581"}, {"kind": "Video", "id": "1153530471"}, {"kind": "Exercise", "id": "986692734"}], "children": [{"path": "khan/math/trigonometry/basic-trigonometry/reciprocal-trig-functions/example-the-six-trig-ratios/", "id": "Q7htxHDN8LE", "title": "Secant (sec), cosecant (csc) and cotangent (cot) example", "kind": "Video", "description": "Worked example where we walk through finding the major trig ratios", "slug": "example-the-six-trig-ratios"}, {"path": "khan/math/trigonometry/basic-trigonometry/reciprocal-trig-functions/example-using-trig-to-solve-for-missing-information/", "id": "rufFQZDDXCE", "title": "Example: Using trig to solve for missing information", "kind": "Video", "description": "Worked example using trig ratios to solve for missing information and evaluate other trig ratios", "slug": "example-using-trig-to-solve-for-missing-information"}, {"path": "khan/math/trigonometry/basic-trigonometry/reciprocal-trig-functions/reciprocal_trig_funcs/", "id": "reciprocal_trig_funcs", "title": "Reciprocal trig functions", "description": "Understand the right triangle definition of sec, csc, and cot functions", "slug": "reciprocal_trig_funcs", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You're now familiar with sine, cosine and tangent. Now you'll see that mathematicians have also defined functions that are the reciprocal of those: cosecant, secant and cotangent.", "node_slug": "reciprocal-trig-functions", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/basic-trigonometry/reciprocal-trig-functions", "extended_slug": "math/trigonometry/basic-trigonometry/reciprocal-trig-functions", "kind": "Topic", "slug": "reciprocal-trig-functions"}], "in_knowledge_map": false, "description": "", "node_slug": "basic-trigonometry", "render_type": "Topic", "topic_page_url": "/math/trigonometry/basic-trigonometry", "extended_slug": "math/trigonometry/basic-trigonometry", "kind": "Topic", "slug": "basic-trigonometry"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/trigonometry/unit-circle-trig-func/", "id": "unit-circle-trig-func", "hide": false, "title": "Unit circle definition of trig functions", "child_data": [{"kind": "Topic", "id": "xefbcec56"}, {"kind": "Topic", "id": "x1df5c1ca"}, {"kind": "Topic", "id": "x3adaedf1"}, {"kind": "Topic", "id": "x674152d1"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/", "id": "radians_tutorial", "hide": false, "title": "Radians", "child_data": [{"kind": "Video", "id": "1159577071"}, {"kind": "Video", "id": "x81df7889"}, {"kind": "Video", "id": "xc3486592"}, {"kind": "Exercise", "id": "x3d8b3eda"}, {"kind": "Video", "id": "x056f0d59"}, {"kind": "Video", "id": "xbf225230"}, {"kind": "Video", "id": "1153821127"}, {"kind": "Exercise", "id": "xf26418ac"}, {"kind": "Video", "id": "1153849058"}, {"kind": "Video", "id": "1153727649"}, {"kind": "Video", "id": "1159451550"}, {"kind": "Exercise", "id": "47770341"}, {"kind": "Video", "id": "26220"}], "children": [{"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/introduction-to-radians/", "id": "EnwWxMZVBeg", "title": "Introduction to radians", "kind": "Video", "description": "Understanding the definition and motivation for radians and the relationship between radians and degrees", "slug": "introduction-to-radians"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/rotation-by-radians-and-quadrants/", "id": "fYQ3GRSu4JU", "title": "Rotation by radians and quadrants", "kind": "Video", "slug": "rotation-by-radians-and-quadrants"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/arc-length-as-fraction-of-circumference/", "id": "XFI7GK4Nv-s", "title": "Arc length as fraction of circumference", "kind": "Video", "slug": "arc-length-as-fraction-of-circumference"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/radians-on-the-unit-circle/", "id": "radians-on-the-unit-circle", "title": "Radians on the unit circle", "description": "A radian is a unit of angle measure, and it has a special relationship with arc length.", "slug": "radians-on-the-unit-circle", "kind": "Exercise"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/arc-length-from-angle-measure/", "id": "dtQyiDMoub4", "title": "Finding arc length from radian angle measure", "kind": "Video", "slug": "arc-length-from-angle-measure"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/ratio-between-cocentric-arcs/", "id": "9wXdONpguLw", "title": "Ratio between concentric arcs", "kind": "Video", "slug": "ratio-between-cocentric-arcs"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/radian-measure-and-arc-length/", "id": "axGgnXyuiTg", "title": "Example: Radian measure and arc length", "kind": "Video", "description": "Worked example that thinks about the relationship between an arc length and the angle that is subtended by the arc.", "slug": "radian-measure-and-arc-length"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/cc-radians-and-arc-length/", "id": "cc-radians-and-arc-length", "title": "Radians and arc length", "slug": "cc-radians-and-arc-length", "kind": "Exercise"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/we-converting-degrees-to-radians/", "id": "O3jvUZ8wvZs", "title": "Example: Converting degrees to radians", "kind": "Video", "description": "Worked example to help understand how we convert radians to degrees", "slug": "we-converting-degrees-to-radians"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/we-converting-radians-to-degrees/", "id": "z0-1gBy1ykE", "title": "Example: Converting radians to degrees", "kind": "Video", "description": "Worked example showing how to convert radians to degrees", "slug": "we-converting-radians-to-degrees"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/radian-and-degree-conversion-practice/", "id": "z8vj8tUCkxY", "title": "Radian and degree conversion practice", "kind": "Video", "description": "A little practice converting between radians and degrees and vice versa", "slug": "radian-and-degree-conversion-practice"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/degrees_to_radians/", "id": "degrees_to_radians", "title": "Degrees to radians", "slug": "degrees_to_radians", "kind": "Exercise"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/radians_tutorial/radians-and-degrees/", "id": "9zspW8u6kQM", "title": "Radians and degrees", "kind": "Video", "description": "What a radian is. Converting radians to degrees and vice versa.", "slug": "radians-and-degrees"}], "in_knowledge_map": false, "description": "Most people know that you can measure angles with degrees, but only exceptionally worldly people know that radians can be an exciting alternative. As you'll see, degrees are somewhat arbitrary (if we lived on a planet that took 600 days to orbit its star, we'd probably have 600 degrees in a full revolution). Radians are pure. Seriously, they are measuring the angle in terms of how long the arc that subtends them is (measured in radiuseseses). If that makes no sense, imagine measuring a bridge with car lengths. If that still doesn't make sense, watch this tutorial!", "node_slug": "radians_tutorial", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/unit-circle-trig-func/radians_tutorial", "extended_slug": "math/trigonometry/unit-circle-trig-func/radians_tutorial", "kind": "Topic", "slug": "radians_tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/unit-circle-trig-func/trig-unit-circle/", "id": "Trig-unit-circle", "hide": false, "title": "Trig problems on the unit circle", "child_data": [{"kind": "Video", "id": "1159990979"}, {"kind": "Video", "id": "1254698328"}, {"kind": "Exercise", "id": "274063565"}, {"kind": "Video", "id": "xdcacd12a"}, {"kind": "Exercise", "id": "x6691b4f7"}], "children": [{"path": "khan/math/trigonometry/unit-circle-trig-func/trig-unit-circle/unit-circle-definition-of-trig-functions-1/", "id": "1m9p9iubMLU", "title": "Introduction to the unit circle", "kind": "Video", "description": "Extending SOH CAH TOA so that we can define trig functions for a broader class of angles", "slug": "unit-circle-definition-of-trig-functions-1"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/trig-unit-circle/unit-circle-manipulative/", "id": "Jni7E2RH43s", "title": "Unit circle manipulative", "kind": "Video", "description": "Walk-through of the Khan Academy Unit Circle manipulative: http://www.khanacademy.org/math/trigonometry/e/unit_circle", "slug": "unit-circle-manipulative"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/trig-unit-circle/unit_circle/", "id": "unit_circle", "title": "Unit circle intuition", "slug": "unit_circle", "kind": "Exercise"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/trig-unit-circle/matching-ratios-trig-functions/", "id": "WffVdYETdng", "title": "Matching ratios to trig functions", "kind": "Video", "slug": "matching-ratios-trig-functions"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/trig-unit-circle/unit-circle-trigonometry/", "id": "unit-circle-trigonometry", "title": "Unit circle trigonometry", "slug": "unit-circle-trigonometry", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "Trig-unit-circle", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/unit-circle-trig-func/Trig-unit-circle", "extended_slug": "math/trigonometry/unit-circle-trig-func/Trig-unit-circle", "kind": "Topic", "slug": "trig-unit-circle"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/unit-circle-trig-func/trig-functions-special-angles/", "id": "trig-functions-special-angles", "hide": false, "title": "Trig functions of special angles", "child_data": [{"kind": "Video", "id": "x8f71dac4"}, {"kind": "Video", "id": "xc2c3ff41"}, {"kind": "Exercise", "id": "xe16185e8"}], "children": [{"path": "khan/math/trigonometry/unit-circle-trig-func/trig-functions-special-angles/solving-triangle-unit-circle/", "id": "KoYZErFpZ5Q", "title": "Solving triangle in unit circle", "kind": "Video", "slug": "solving-triangle-unit-circle"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/trig-functions-special-angles/trig-functions-special-angles/", "id": "3yBYXNW1Nls", "title": "Finding trig functions of special angles example", "kind": "Video", "slug": "trig-functions-special-angles"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/trig-functions-special-angles/trigonometric-functions-of-special-angles/", "id": "trigonometric-functions-of-special-angles", "title": "Trigonometric functions of special angles", "slug": "trigonometric-functions-of-special-angles", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we'll really digest how special triangles and angles that show up a lot in mathematics relate to each other and the various trig functions.", "node_slug": "trig-functions-special-angles", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/unit-circle-trig-func/trig-functions-special-angles", "extended_slug": "math/trigonometry/unit-circle-trig-func/trig-functions-special-angles", "kind": "Topic", "slug": "trig-functions-special-angles"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/", "id": "inverse_trig_functions", "hide": false, "title": "Inverse trig functions", "child_data": [{"kind": "Video", "id": "26269"}, {"kind": "Video", "id": "26273"}, {"kind": "Video", "id": "26271"}, {"kind": "Video", "id": "1153545782"}, {"kind": "Exercise", "id": "3943241"}, {"kind": "Video", "id": "xdbe9f9c2"}, {"kind": "Video", "id": "x5679daee"}, {"kind": "Video", "id": "x7988ecbb"}, {"kind": "Video", "id": "x793351da"}, {"kind": "Exercise", "id": "x9c5b849a"}, {"kind": "Video", "id": "x07e7f3db"}, {"kind": "Video", "id": "x02d93c3e"}, {"kind": "Video", "id": "x42b7ba00"}, {"kind": "Exercise", "id": "xd9a740c6"}], "children": [{"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-trig-functions-arcsin/", "id": "JGU74wbZMLg", "title": "Inverse trig functions: arcsin", "kind": "Video", "description": "Introduction to the inverse trig function arcsin", "slug": "inverse-trig-functions-arcsin"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-trig-functions-arccos/", "id": "eTDaJ4ebK28", "title": "Inverse trig functions: arccos", "kind": "Video", "description": "Understanding the inverse cosine or arccos function", "slug": "inverse-trig-functions-arccos"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-trig-functions-arctan/", "id": "Idxeo49szW0", "title": "Inverse trig functions: arctan", "kind": "Video", "description": "Understanding the arctan or inverse tangent function.", "slug": "inverse-trig-functions-arctan"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/example-calculator-to-evaluate-inverse-trig-function/", "id": "4M62l7m1FJ4", "title": "Example: Calculator to evaluate inverse trig function", "kind": "Video", "description": "Example using calculator to evaluate inverse tangent function", "slug": "example-calculator-to-evaluate-inverse-trig-function"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse_trig_functions/", "id": "inverse_trig_functions", "title": "Evaluating inverse trig functions", "slug": "inverse_trig_functions", "kind": "Exercise"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/sine-solutions/", "id": "NC7iWEQ9Kug", "title": "Solution set to sin equation", "kind": "Video", "slug": "sine-solutions"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/restricting-trig-function-domain/", "id": "tCV9VyIIaw0", "title": "How to restrict the domain of a trig function to make it invertible (example)", "kind": "Video", "description": "Sal is given the graph of a trigonometric function, and he discusses ways in which he can change the function to make it invertible.", "slug": "restricting-trig-function-domain"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-tan-domain/", "id": "QGfdhqbilY8", "title": "Inverse tan domain and range", "kind": "Video", "slug": "inverse-tan-domain"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-tan-scenario/", "id": "MABWdzmZFIQ", "title": "Inverse tangent scenario", "kind": "Video", "slug": "inverse-tan-scenario"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/understanding-inverse-trig-functions/", "id": "understanding-inverse-trig-functions", "title": "Understanding inverse trig functions", "slug": "understanding-inverse-trig-functions", "kind": "Exercise"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/angle-sun-with-ground/", "id": "Xu1lBwJw1OU", "title": "Angle of sun with the ground based on shadow", "kind": "Video", "slug": "angle-sun-with-ground"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/modeling-temperature-fluxtuations/", "id": "mVlCXkht6hg", "title": "Modeling annual temperature variation with trigonometry", "kind": "Video", "slug": "modeling-temperature-fluxtuations"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-trig-with-model/", "id": "2pwnr_soZEU", "title": "Applying inverse trig function with model", "kind": "Video", "slug": "inverse-trig-with-model"}, {"path": "khan/math/trigonometry/unit-circle-trig-func/inverse_trig_functions/inverse-trig-word-problems/", "id": "inverse-trig-word-problems", "title": "Inverse trig word problems", "slug": "inverse-trig-word-problems", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Someone has taken the sine of an angle and got 0.85671 and they won't tell you what the angle is!!! You must know it! But how?!!!\n\nInverse trig functions are here to save your day (they often go under the aliases arcsin, arccos, and arctan).", "node_slug": "inverse_trig_functions", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/unit-circle-trig-func/inverse_trig_functions", "extended_slug": "math/trigonometry/unit-circle-trig-func/inverse_trig_functions", "kind": "Topic", "slug": "inverse_trig_functions"}], "in_knowledge_map": false, "description": "Let's now extend the domain of the trig function we love by exploring the unit circle definition of trig functions!", "node_slug": "unit-circle-trig-func", "render_type": "Topic", "topic_page_url": "/math/trigonometry/unit-circle-trig-func", "extended_slug": "math/trigonometry/unit-circle-trig-func", "kind": "Topic", "slug": "unit-circle-trig-func"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/trigonometry/trig-function-graphs/", "id": "trig-function-graphs", "hide": false, "title": "Graphs of trig functions", "child_data": [{"kind": "Topic", "id": "x31183e90"}, {"kind": "Topic", "id": "x8cf79fa7"}, {"kind": "Topic", "id": "x215566f4"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/", "id": "trig_graphs_tutorial", "hide": false, "title": "Graphs of trig functions", "child_data": [{"kind": "Video", "id": "x2f235e5a"}, {"kind": "Video", "id": "1153684694"}, {"kind": "Exercise", "id": "xd22bf729"}, {"kind": "Exercise", "id": "xf81f8ab1"}, {"kind": "Exercise", "id": "xf50cfdf0"}, {"kind": "Video", "id": "1153456927"}, {"kind": "Video", "id": "1153795385"}, {"kind": "Video", "id": "1153664550"}, {"kind": "Video", "id": "1153830189"}, {"kind": "Video", "id": "1153825235"}, {"kind": "Video", "id": "1153750318"}, {"kind": "Exercise", "id": "2033"}, {"kind": "Video", "id": "xdaccbc0b"}, {"kind": "Video", "id": "x82df9027"}, {"kind": "Video", "id": "x9267c937"}, {"kind": "Exercise", "id": "x0b7c269b"}], "children": [{"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/midline-amplitude-period/", "id": "s4cLM0l1gd4", "title": "Midline, amplitude and period of a function", "kind": "Video", "slug": "midline-amplitude-period"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/we-amplitude-and-period/", "id": "SBqnRja4CW4", "title": "Example: Amplitude and period", "kind": "Video", "description": "Determining the amplitude and period of a trig function", "slug": "we-amplitude-and-period"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/amplitude-of-trig-functions/", "id": "amplitude-of-trig-functions", "title": "Amplitude of trigonometric functions", "description": "Find the amplitude of trigonometric functions.", "slug": "amplitude-of-trig-functions", "kind": "Exercise"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/midline-of-trig-functions/", "id": "midline-of-trig-functions", "title": "Midline of trigonometric functions", "description": "Find the midline of trigonometric functions.", "slug": "midline-of-trig-functions", "kind": "Exercise"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/period-of-trig-functions/", "id": "period-of-trig-functions", "title": "Period of trigonometric functions", "description": "Find the period of trigonometric functions.", "slug": "period-of-trig-functions", "kind": "Exercise"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/we-graph-domain-and-range-of-sine-function/", "id": "sjUhr0HkLUg", "title": "Example: Graph, domain, and range of sine function", "kind": "Video", "description": "Graphing a sin curve to think about its domain and range.", "slug": "we-graph-domain-and-range-of-sine-function"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/we-graph-of-cosine-function/", "id": "SdHwokUU8xI", "title": "Example: Graph of cosine", "kind": "Video", "description": "Basic interpretation of the graph of the cosine function", "slug": "we-graph-of-cosine-function"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/we-graphs-of-sine-and-cosine-functions/", "id": "fp9DZYmiSC4", "title": "Example: Intersection of sine and cosine", "kind": "Video", "description": "Thinking about where the graphs of sin and cos intersect.", "slug": "we-graphs-of-sine-and-cosine-functions"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/example-amplitude-and-period-transformations/", "id": "0zCcFSO8ouE", "title": "Example: Amplitude and period transformations", "kind": "Video", "description": "Understanding how the amplitude and period changes as coefficients change.", "slug": "example-amplitude-and-period-transformations"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/amplitude-and-period-cosine-transformations/", "id": "uBVhtGL9y88", "title": "Example: Amplitude and period cosine transformations", "kind": "Video", "description": "Visualizing changes in amplitude and period for a cosine function", "slug": "amplitude-and-period-cosine-transformations"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/matching-a-trigonometric-function-to-its-graph/", "id": "TGgOCc5hoHA", "title": "Example: Figure out the trig function", "kind": "Video", "description": "Determining a trig function given its graph", "slug": "matching-a-trigonometric-function-to-its-graph"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/graphs_of_sine_and_cosine/", "id": "graphs_of_sine_and_cosine", "title": "Graphs of sine and cosine", "slug": "graphs_of_sine_and_cosine", "kind": "Exercise"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/trig-function-equation/", "id": "yHo0CcDVHsk", "title": "Determining the equation of a trig function", "kind": "Video", "slug": "trig-function-equation"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/plotting-trig-features/", "id": "LplRIAd66pc", "title": "Plotting maxima, minima and midline intersections of trig function", "kind": "Video", "slug": "plotting-trig-features"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/tangent-graph/", "id": "FK6-tZ5D7xM", "title": "Tangent graph", "kind": "Video", "slug": "tangent-graph"}, {"path": "khan/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/graphs-of-trigonometric-functions/", "id": "graphs-of-trigonometric-functions", "title": "Graphs of trigonometric functions", "slug": "graphs-of-trigonometric-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The unit circle definition allows us to define sine and cosine over all real numbers. Doesn't that make you curious what the graphs might look like? Well this tutorial will scratch that itch (and maybe a few others). Have fun.", "node_slug": "trig_graphs_tutorial", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/trig-function-graphs/trig_graphs_tutorial", "extended_slug": "math/trigonometry/trig-function-graphs/trig_graphs_tutorial", "kind": "Topic", "slug": "trig_graphs_tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/trig-function-graphs/modeling-periodic-functions/", "id": "modeling-periodic-functions", "hide": false, "title": "Modeling with periodic functions", "child_data": [{"kind": "Video", "id": "x02d93c3e"}, {"kind": "Video", "id": "x42b7ba00"}, {"kind": "Video", "id": "xd667e103"}, {"kind": "Exercise", "id": "xff908667"}, {"kind": "Video", "id": "x049abc7f"}, {"kind": "Exercise", "id": "xb3213ad9"}], "children": [{"path": "khan/math/trigonometry/trig-function-graphs/modeling-periodic-functions/modeling-temperature-fluxtuations/", "id": "mVlCXkht6hg", "title": "Modeling annual temperature variation with trigonometry", "kind": "Video", "slug": "modeling-temperature-fluxtuations"}, {"path": "khan/math/trigonometry/trig-function-graphs/modeling-periodic-functions/inverse-trig-with-model/", "id": "2pwnr_soZEU", "title": "Applying inverse trig function with model", "kind": "Video", "slug": "inverse-trig-with-model"}, {"path": "khan/math/trigonometry/trig-function-graphs/modeling-periodic-functions/modeling-with-shifted-trig-functions/", "id": "RX0DY9eRp8g", "title": "Modeling temperature through the day", "kind": "Video", "slug": "modeling-with-shifted-trig-functions"}, {"path": "khan/math/trigonometry/trig-function-graphs/modeling-periodic-functions/modeling-with-periodic-functions/", "id": "modeling-with-periodic-functions", "title": "Modeling with periodic functions", "slug": "modeling-with-periodic-functions", "kind": "Exercise"}, {"path": "khan/math/trigonometry/trig-function-graphs/modeling-periodic-functions/modeling-periodic-function-with-shift/", "id": "MJBjGnR6vlk", "title": "Day length in Alaska", "kind": "Video", "slug": "modeling-periodic-function-with-shift"}, {"path": "khan/math/trigonometry/trig-function-graphs/modeling-periodic-functions/modeling-with-periodic-functions-2/", "id": "modeling-with-periodic-functions-2", "title": "Modeling with periodic functions 2", "slug": "modeling-with-periodic-functions-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "By now, you are reasonably familiar with the graphs of sine and cosine and are beginning to appreciate that they can be used to model periodic phenomena. In this tutorial, you'll get experience doing just that--modeling with periodic functions!", "node_slug": "modeling-periodic-functions", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/trig-function-graphs/modeling-periodic-functions", "extended_slug": "math/trigonometry/trig-function-graphs/modeling-periodic-functions", "kind": "Topic", "slug": "modeling-periodic-functions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/trigonometry/trig-function-graphs/long_live_tau/", "id": "long_live_tau", "hide": false, "title": "Long live tau", "child_data": [{"kind": "Video", "id": "145890679"}, {"kind": "Video", "id": "538086220"}], "children": [{"path": "khan/math/trigonometry/trig-function-graphs/long_live_tau/tau-versus-pi/", "id": "1jDDfkKKgmc", "title": "Tau versus pi", "kind": "Video", "description": "Why Tau might be a better number to look at than Pi", "slug": "tau-versus-pi"}, {"path": "khan/math/trigonometry/trig-function-graphs/long_live_tau/pi-is-still-wrong/", "id": "jG7vhMMXagQ", "title": "Pi is (still) wrong.", "kind": "Video", "description": "Please excuse the simple math and spelling errors. You shouldn't believe anything I say without double-checking even at the best of times.\n\nGo here: http://tauday.com/\nand here: http://www.math.utah.edu/~palais/pi.html\n\nMe: http://vihart.com", "slug": "pi-is-still-wrong"}], "in_knowledge_map": false, "description": "Pi (3.14159...) seems to get all of the attention in mathematics. On some level this is warranted. The ratio of the circumference of a circle to the diameter. Seems pretty pure. But what about the ratio of the circumference to the radius (which is two times pi and referred to as \"tau\")? Now that you know a bit of trigonometry, you'll discover in videos made by Sal and Vi that \"tau\" may be much more deserving of the throne!", "node_slug": "long_live_tau", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/trig-function-graphs/long_live_tau", "extended_slug": "math/trigonometry/trig-function-graphs/long_live_tau", "kind": "Topic", "slug": "long_live_tau"}], "in_knowledge_map": false, "description": "In this topic, we'll gain a deeper appreciation for the periodic nature of trig functions by visualizing and modeling real-world phenomena with them.", "node_slug": "trig-function-graphs", "render_type": "Topic", "topic_page_url": "/math/trigonometry/trig-function-graphs", "extended_slug": "math/trigonometry/trig-function-graphs", "kind": "Topic", "slug": "trig-function-graphs"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/trigonometry/less-basic-trigonometry/", "id": "less-basic-trigonometry", "hide": false, "title": "Trig identities and examples", "child_data": [{"kind": "Topic", "id": "xf98a840e"}, {"kind": "Topic", "id": "xf0000c37"}, {"kind": "Topic", "id": "xd2efc747"}, {"kind": "Topic", "id": "xb47e6c87"}, {"kind": "Topic", "id": "x3c0c78e3"}, {"kind": "Topic", "id": "x97f8ef15"}, {"kind": "Topic", "id": "xced61f24"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity/", "id": "trig-symmetry-periodicity", "hide": false, "title": "Symmetry and periodicity of trig functions", "child_data": [{"kind": "Video", "id": "xa88b4a7e"}, {"kind": "Video", "id": "x2cb52cc7"}, {"kind": "Video", "id": "x5e52b073"}, {"kind": "Video", "id": "xa5a398fc"}, {"kind": "Exercise", "id": "xf8461f66"}], "children": [{"path": "khan/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity/trigonometry-unit-circle-symmetry/", "id": "tzQ7arA917E", "title": "Symmetry of trig values", "kind": "Video", "slug": "trigonometry-unit-circle-symmetry"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity/tan-symmetries-unit-circle/", "id": "k_wJsio68D4", "title": "Unit circle symmetries for tan", "kind": "Video", "slug": "tan-symmetries-unit-circle"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity/trig-angle-rotations/", "id": "h-TPSylHrvE", "title": "Relating trig function through angle rotations", "kind": "Video", "slug": "trig-angle-rotations"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity/tan-periodicity/", "id": "C3HFAyigqoY", "title": "Periodicity of tan example", "kind": "Video", "slug": "tan-periodicity"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity/symmetry-and-periodicity-of-trig-functions/", "id": "symmetry-and-periodicity-of-trig-functions", "title": "Symmetry and periodicity of trigonometric functions", "slug": "symmetry-and-periodicity-of-trig-functions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we will explore the unit circle in more depth so that we can better appreciate how trig functions of an angle might relate to angles that are in some way symmetric within the unit circle. We'll also look at the periodicity of the functions themselves (why they repeat after a certain change in angle).", "node_slug": "trig-symmetry-periodicity", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity", "extended_slug": "math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity", "kind": "Topic", "slug": "trig-symmetry-periodicity"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/less-basic-trigonometry/pythagorean-identity/", "id": "pythagorean-identity", "hide": false, "title": "Pythagorean identity", "child_data": [{"kind": "Video", "id": "x10c52471"}, {"kind": "Video", "id": "x952a1f00"}, {"kind": "Video", "id": "xda6daf69"}, {"kind": "Exercise", "id": "x2273f45c"}, {"kind": "Video", "id": "x756fc164"}, {"kind": "Exercise", "id": "986800089"}], "children": [{"path": "khan/math/trigonometry/less-basic-trigonometry/pythagorean-identity/pythagorean-trig-identity-from-soh-cah-toa/", "id": "HnDvUaVjQ1I", "title": "Pythagorean trig identity from soh cah toa", "kind": "Video", "slug": "pythagorean-trig-identity-from-soh-cah-toa"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/pythagorean-identity/pythagorean-trig-identity-from-unit-circle/", "id": "n0DLSIOYBsQ", "title": "Pythagorean trig identity from unit circle", "kind": "Video", "slug": "pythagorean-trig-identity-from-unit-circle"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/pythagorean-identity/using-the-pythagorean-trig-identity/", "id": "soIt2TwV6Xk", "title": "Using the Pythagorean trig identity", "kind": "Video", "slug": "using-the-pythagorean-trig-identity"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/pythagorean-identity/circles-and-pythagorean-identities/", "id": "circles-and-pythagorean-identities", "title": "Circles and Pythagorean identities", "slug": "circles-and-pythagorean-identities", "kind": "Exercise"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/pythagorean-identity/examples-using-pythagorean-identities-to-simplify-trigonometric-expressions/", "id": "4OEeVLo5V1o", "title": "Examples using pythagorean identities to simplify trigonometric expressions", "kind": "Video", "slug": "examples-using-pythagorean-identities-to-simplify-trigonometric-expressions"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/pythagorean-identity/pythagorean_identities/", "id": "pythagorean_identities", "title": "Manipulating trig expressions with pythagorean identities", "description": "Simplify expressions using Pythagorean trig identities", "slug": "pythagorean_identities", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we look at the relationship between the definitions of sine, cosine and tangent (both SOH CAH TOA and unit circle definitions) and the Pythagorean theorem to derive and apply the Pythagorean identity. This is the building block of much of the rest of the trigonometric identities and will be surprisingly useful the rest of your life!", "node_slug": "pythagorean-identity", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/less-basic-trigonometry/pythagorean-identity", "extended_slug": "math/trigonometry/less-basic-trigonometry/pythagorean-identity", "kind": "Topic", "slug": "pythagorean-identity"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/", "id": "angle-addition-formulas-trig", "hide": false, "title": "Angle addition formulas", "child_data": [{"kind": "Video", "id": "xdf09400e"}, {"kind": "Video", "id": "x3448aa45"}, {"kind": "Video", "id": "x6130cff9"}, {"kind": "Video", "id": "xd0dcedae"}, {"kind": "Video", "id": "xfb68005e"}, {"kind": "Video", "id": "x5368b1c4"}, {"kind": "Exercise", "id": "986815073"}, {"kind": "Exercise", "id": "x1be2f323"}], "children": [{"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/sin-angle-addition/", "id": "sI789G6FBb4", "title": "Applying angle addition formula for sin", "kind": "Video", "slug": "sin-angle-addition"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/cosine-angle-addition/", "id": "yV4Xa8Xtmrc", "title": "Angle addition formula with cosine", "kind": "Video", "slug": "cosine-angle-addition"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/cosine-angle-addition-2/", "id": "XGpEHj43kcc", "title": "Another example using angle addition formula with cosine", "kind": "Video", "slug": "cosine-angle-addition-2"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/sine-angle-addition-2/", "id": "2RbKfRfzD-M", "title": "Sine of non special angle", "kind": "Video", "slug": "sine-angle-addition-2"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/cosine-addition-identity-example/", "id": "h0SNEO25vIw", "title": "Cosine addition identity example", "kind": "Video", "slug": "cosine-addition-identity-example"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/double-angle-formula-for-cosine-example-c/", "id": "D_smr0GBPvA", "title": "Double angle formula for cosine example", "kind": "Video", "slug": "double-angle-formula-for-cosine-example-c"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/trig_addition_identities/", "id": "trig_addition_identities", "title": "Addition and subtraction trig identities", "description": "Computing expressions using trig addition and subtraction identities", "slug": "trig_addition_identities", "kind": "Exercise"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/applying-angle-addition-formulas/", "id": "applying-angle-addition-formulas", "title": "Applying angle addition formulas", "slug": "applying-angle-addition-formulas", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We'll now see that we can express the sin(a+b) and the cos(a+b) in terms of sin a, sin b, cos a, and cos b. This will be handy in a whole set of applications.", "node_slug": "angle-addition-formulas-trig", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig", "extended_slug": "math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig", "kind": "Topic", "slug": "angle-addition-formulas-trig"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formula-proofs/", "id": "angle-addition-formula-proofs", "hide": false, "title": "Angle addition formula proofs", "child_data": [{"kind": "Video", "id": "x8c2e47e4"}, {"kind": "Video", "id": "x9472d9c4"}, {"kind": "Exercise", "id": "x8a65c611"}], "children": [{"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formula-proofs/proof-angle-addition-sine/", "id": "R0EQg9vgbQw", "title": "Proof of angle addition formula for sine", "kind": "Video", "slug": "proof-angle-addition-sine"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formula-proofs/proof-angle-addition-cosine/", "id": "0VBQnR2h8XM", "title": "Proof of angle addition formula for cosine", "kind": "Video", "slug": "proof-angle-addition-cosine"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/angle-addition-formula-proofs/understanding-angle-addition-formulas/", "id": "understanding-angle-addition-formulas", "title": "Understanding angle addition formulas", "slug": "understanding-angle-addition-formulas", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's see if we can prove the angle addition formulas for sine and cosine!", "node_slug": "angle-addition-formula-proofs", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/less-basic-trigonometry/angle-addition-formula-proofs", "extended_slug": "math/trigonometry/less-basic-trigonometry/angle-addition-formula-proofs", "kind": "Topic", "slug": "angle-addition-formula-proofs"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/", "id": "law-sines-cosines", "hide": false, "title": "Law of cosines and law of sines", "child_data": [{"kind": "Video", "id": "x17ddf742"}, {"kind": "Video", "id": "xb7d3bb05"}, {"kind": "Video", "id": "x461dc00c"}, {"kind": "Exercise", "id": "1080800905"}, {"kind": "Video", "id": "x29e70bc4"}, {"kind": "Video", "id": "x955c68f1"}, {"kind": "Exercise", "id": "1080931108"}, {"kind": "Exercise", "id": "x2f077f1e"}, {"kind": "Video", "id": "26254"}, {"kind": "Video", "id": "26258"}, {"kind": "Exercise", "id": "x27e41b84"}], "children": [{"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law-of-cosines-example/", "id": "ZElOxG7_m3c", "title": "Law of cosines", "kind": "Video", "slug": "law-of-cosines-example"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law-of-cosines-missing-angle/", "id": "Ei54NnQ0FKs", "title": "Law of cosines to determine grade", "kind": "Video", "slug": "law-of-cosines-missing-angle"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law-of-cosines-word-problem/", "id": "6kGi1dvGZNY", "title": "Law of cosines for star distance", "kind": "Video", "slug": "law-of-cosines-word-problem"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law_of_cosines/", "id": "law_of_cosines", "title": "Law of cosines", "description": "Solve missing triangle measures using the law of cosines", "slug": "law_of_cosines", "kind": "Exercise"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law-of-sines/", "id": "VjmFKle7xIw", "title": "Law of sines", "kind": "Video", "slug": "law-of-sines"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law-of-sines-example/", "id": "IJySBMtFlnQ", "title": "Law of sines for missing angle", "kind": "Video", "slug": "law-of-sines-example"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law_of_sines/", "id": "law_of_sines", "title": "Law of sines", "description": "Solve missing triangle measures using the law of sines", "slug": "law_of_sines", "kind": "Exercise"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law-of-sines-and-cosines-word-problems/", "id": "law-of-sines-and-cosines-word-problems", "title": "Law of sines and law of cosines word problems", "slug": "law-of-sines-and-cosines-word-problems", "kind": "Exercise"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/law-of-cosines/", "id": "pGaDcOMdw48", "title": "Proof of the law of cosines", "kind": "Video", "description": "Proof of the law of cosines to solve for a side of a triangle when 2 sides and an angle are known.", "slug": "law-of-cosines"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/proof-law-of-sines/", "id": "APNkWrD-U1k", "title": "Proof: Law of sines", "kind": "Video", "description": "A simple proof of the Law of Sines", "slug": "proof-law-of-sines"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/law-sines-cosines/non-right-triangle-proofs/", "id": "non-right-triangle-proofs", "title": "Non-right triangle proofs", "slug": "non-right-triangle-proofs", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The primary tool that we've had to find the length of a side of a triangle given the other two sides has been the Pythagorean theorem, but that only applies to right triangles. In this tutorial, we'll extend this triangle-side-length toolkit with the law of cosines and the law of sines. Using these tool, given information about side lengths and angles, we can figure out things about even non-right triangles that you may have thought weren't even possible!", "node_slug": "law-sines-cosines", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/less-basic-trigonometry/law-sines-cosines", "extended_slug": "math/trigonometry/less-basic-trigonometry/law-sines-cosines", "kind": "Topic", "slug": "law-sines-cosines"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/trigonometry/less-basic-trigonometry/trig_iden_tutorial/", "id": "trig_iden_tutorial", "hide": false, "title": "Trigonometric identities", "child_data": [{"kind": "Video", "id": "26275"}, {"kind": "Video", "id": "26246"}, {"kind": "Video", "id": "26248"}], "children": [{"path": "khan/math/trigonometry/less-basic-trigonometry/trig_iden_tutorial/trigonometry-identity-review-fun/", "id": "a70-dYvDJZY", "title": "Trigonometry identity review/fun", "kind": "Video", "slug": "trigonometry-identity-review-fun"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/trig_iden_tutorial/trig-identities-part-2-parr-4-if-you-watch-the-proofs/", "id": "ZWSoyUxAQW0", "title": "Trig identities part 2 (part 4 if you watch the proofs)", "kind": "Video", "description": "More playing around with trig identities", "slug": "trig-identities-part-2-parr-4-if-you-watch-the-proofs"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/trig_iden_tutorial/trig-identies-part-3-part-5-if-you-watch-the-proofs/", "id": "JXCiFbEMTZ4", "title": "Trig identities part 3 (part 5 if you watch the proofs)", "kind": "Video", "description": "Continuation of the playing around with trig identities", "slug": "trig-identies-part-3-part-5-if-you-watch-the-proofs"}], "in_knowledge_map": false, "description": "If you're starting to sense that there may be more to trig functions than meet the eye, you are sensing right. In this tutorial you'll discover exciting and beautiful and elegant and hilarious relationships between our favorite trig functions (and maybe a few that we don't particularly like).\n\nWarning: Many of these videos are the old, rougher Sal with the cheap equipment!", "node_slug": "trig_iden_tutorial", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/less-basic-trigonometry/trig_iden_tutorial", "extended_slug": "math/trigonometry/less-basic-trigonometry/trig_iden_tutorial", "kind": "Topic", "slug": "trig_iden_tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/trigonometry/less-basic-trigonometry/more-trig-examples/", "id": "more-trig-examples", "hide": false, "title": "Advanced trig examples", "child_data": [{"kind": "Video", "id": "13179281"}, {"kind": "Video", "id": "13179282"}, {"kind": "Video", "id": "8187432"}, {"kind": "Video", "id": "8187460"}, {"kind": "Video", "id": "8187459"}, {"kind": "Video", "id": "8187470"}], "children": [{"path": "khan/math/trigonometry/less-basic-trigonometry/more-trig-examples/2003-aime-ii-problem-11-avi/", "id": "smtrrefmC40", "title": "2003 AIME II problem 11", "kind": "Video", "description": "A little trigonometry to figure out the area of a triangle", "slug": "2003-aime-ii-problem-11-avi"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/more-trig-examples/2003-aime-ii-problem-14/", "id": "Ec-BKdC8vOo", "title": "2003 AIME II problem 14", "kind": "Video", "description": "Trigonometry and geometry to find the area of an equilateral (but not regular) hexagon", "slug": "2003-aime-ii-problem-14"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/more-trig-examples/iit-jee-trigonometry-problem-1/", "id": "X7GT9JKoAbo", "title": "IIT JEE trigonometry problem 1", "kind": "Video", "description": "2010 IIT JEE Paper I #29 Trigonometry problem", "slug": "iit-jee-trigonometry-problem-1"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/more-trig-examples/iit-jee-trigonometric-maximum/", "id": "tzR9jUCSniQ", "title": "IIT JEE trigonometric maximum", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 48 Trigonometric Maximum", "slug": "iit-jee-trigonometric-maximum"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/more-trig-examples/iit-jee-trigonometric-constraints/", "id": "EjtjdJZ2x8w", "title": "IIT JEE trigonometric constraints", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 47 Trigonometric Constraints", "slug": "iit-jee-trigonometric-constraints"}, {"path": "khan/math/trigonometry/less-basic-trigonometry/more-trig-examples/trigonometric-system-example/", "id": "Y2ed-g8Lpdc", "title": "Trigonometric system example", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 55 Trigonometric System", "slug": "trigonometric-system-example"}], "in_knowledge_map": false, "description": "This tutorial is a catch-all for a bunch of things that we haven't been able (for lack of time or ability) to categorize into other tutorials :(", "node_slug": "more-trig-examples", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/less-basic-trigonometry/more-trig-examples", "extended_slug": "math/trigonometry/less-basic-trigonometry/more-trig-examples", "kind": "Topic", "slug": "more-trig-examples"}], "in_knowledge_map": false, "description": "", "node_slug": "less-basic-trigonometry", "render_type": "Topic", "topic_page_url": "/math/trigonometry/less-basic-trigonometry", "extended_slug": "math/trigonometry/less-basic-trigonometry", "kind": "Topic", "slug": "less-basic-trigonometry"}, {"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/math/trigonometry/trig-miscellaneous/", "id": "trig-miscellaneous", "hide": false, "title": "Miscellaneous", "child_data": [{"kind": "Topic", "id": "x22050b70"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/math/trigonometry/trig-miscellaneous/trig-readiness-warmup/", "id": "trig-readiness-warmup", "hide": false, "title": "Trigonometry readiness warmup", "child_data": [{"kind": "Exercise", "id": "x97e74a14"}], "children": [{"path": "khan/math/trigonometry/trig-miscellaneous/trig-readiness-warmup/trigonometry-warmup/", "id": "trigonometry-warmup", "title": "Trigonometry warmup", "description": "Are you ready to tackle trigonometry? Check your understanding of foundational skills with this short quiz.", "slug": "trigonometry-warmup", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "trig-readiness-warmup", "render_type": "Tutorial", "topic_page_url": "/math/trigonometry/trig-miscellaneous/trig-readiness-warmup", "extended_slug": "math/trigonometry/trig-miscellaneous/trig-readiness-warmup", "kind": "Topic", "slug": "trig-readiness-warmup"}], "in_knowledge_map": false, "description": "", "node_slug": "trig-miscellaneous", "render_type": "Topic", "topic_page_url": "/math/trigonometry/trig-miscellaneous", "extended_slug": "math/trigonometry/trig-miscellaneous", "kind": "Topic", "slug": "trig-miscellaneous"}], "in_knowledge_map": false, "description": "Big, fancy word, right? Don't be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry (\"trig\" as it's sometimes called) has something to do with triangles. You would be right! Trig is the study of the properties of triangles. Why is it important? It's used in measuring precise distances, particularly in industries like satellite systems and sciences like astronomy. It's not only space, however. Trig is present in architecture and music, too. Now you may wonder...how is knowing the measurement and properties of triangles relevant to music?? THAT is a great question. Maybe you'll learn the answer from us in these tutorials!", "node_slug": "trigonometry", "render_type": "Subject", "topic_page_url": "/math/trigonometry", "extended_slug": "math/trigonometry", "kind": "Topic", "slug": "trigonometry"}, {"icon_src": "/images/power-mode/badges/probability-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/probability/", "id": "probability", "hide": false, "title": "Probability and statistics", "child_data": [{"kind": "Topic", "id": "xd573b830"}, {"kind": "Topic", "id": "x9966d42b"}, {"kind": "Topic", "id": "x9f54cbb4"}, {"kind": "Topic", "id": "x7c5c47ff"}, {"kind": "Topic", "id": "x99ac8b9e"}, {"kind": "Topic", "id": "xea585073"}, {"kind": "Topic", "id": "x2a3773b2"}, {"kind": "Topic", "id": "x1dbb4462"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/probability/independent-dependent-probability/", "id": "independent-dependent-probability", "hide": false, "title": "Independent and dependent events", "child_data": [{"kind": "Topic", "id": "x5ff9185d"}, {"kind": "Topic", "id": "x6e9b65ff"}, {"kind": "Topic", "id": "x125a7186"}, {"kind": "Topic", "id": "x8894d776"}, {"kind": "Topic", "id": "xa85e1e09"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/independent-dependent-probability/basic_probability/", "id": "basic_probability", "hide": false, "title": "Basic probability", "child_data": [{"kind": "Video", "id": "185786265"}, {"kind": "Article", "id": "xb8a34a27"}, {"kind": "Video", "id": "x523e34d6"}, {"kind": "Exercise", "id": "1337007129"}, {"kind": "Video", "id": "x9c78221b"}, {"kind": "Exercise", "id": "x7b6a9bcb"}, {"kind": "Video", "id": "380860447"}, {"kind": "Video", "id": "60107867"}, {"kind": "Video", "id": "27091"}, {"kind": "Exercise", "id": "13179429"}], "children": [{"path": "khan/math/probability/independent-dependent-probability/basic_probability/basic-probability/", "id": "uzkc-qNVoOk", "title": "Probability explained", "kind": "Video", "description": "We give you an introduction to probability through the example of flipping a quarter and rolling a die.", "slug": "basic-probability"}, {"path": "khan/math/probability/independent-dependent-probability/basic_probability/probability-space-exercise-example/", "id": "FICRd7Lp67s", "title": "Determining probability", "kind": "Video", "description": "In this example, determine the scenarios that are probable given the rolling of two dice.", "slug": "probability-space-exercise-example"}, {"path": "khan/math/probability/independent-dependent-probability/basic_probability/dice_probability/", "id": "dice_probability", "title": "Probability of rolling dice", "description": "Practice calculating probabilities in dice rolling scenarios.", "slug": "dice_probability", "kind": "Exercise"}, {"path": "khan/math/probability/independent-dependent-probability/basic_probability/describing-subsets-of-sample-spaces-exercise/", "id": "0uHhk7P9SNo", "title": "Describing subsets of sample spaces exercise", "kind": "Video", "slug": "describing-subsets-of-sample-spaces-exercise"}, {"path": "khan/math/probability/independent-dependent-probability/basic_probability/describing-subsets-of-sample-spaces/", "id": "describing-subsets-of-sample-spaces", "title": "Describing subsets of sample spaces", "slug": "describing-subsets-of-sample-spaces", "kind": "Exercise"}, {"path": "khan/math/probability/independent-dependent-probability/basic_probability/simple-probability/", "id": "yUaI0JriZtY", "title": "Finding probablity example", "kind": "Video", "description": "In order to find the probability of picking a yellow marble from a bag, we have to first determine the number of possible outcomes and how then many of them meet our constraints.", "slug": "simple-probability"}, {"path": "khan/math/probability/independent-dependent-probability/basic_probability/probability-1-module-examples/", "id": "mLE-SlOZToc", "title": "Finding probablity example 2", "kind": "Video", "description": "In this example we are figuring out the probability of randomly picking a non-blue marble from a bag. Again, we'll have to think about the possible outcomes first.", "slug": "probability-1-module-examples"}, {"path": "khan/math/probability/independent-dependent-probability/basic_probability/events-and-outcomes-1/", "id": "cdRLBOnLTDk", "title": "Finding probablity example 3", "kind": "Video", "description": "Now we're working out the probability of randomly selecting a yellow marble from a bag of multi-colored marbles. Let's practice together.", "slug": "events-and-outcomes-1"}, {"path": "khan/math/probability/independent-dependent-probability/basic_probability/probability_1/", "id": "probability_1", "title": "Simple probability", "description": "Practice finding probabilities of events, such as rolling dice, drawing marbles out of a bag, and spinning spinners.", "slug": "probability_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Can I pick a red frog out of a bag that only contains marbles? Is it smart to buy a lottery ticket?\n\nEven if we are unsure about whether something will happen, can we start to be mathematical about the \"chances\" of an event (essentially realizing that some things are more likely than others). This tutorial will introduce us to the tools that allow us to think about random events.", "node_slug": "basic_probability", "render_type": "Tutorial", "topic_page_url": "/math/probability/independent-dependent-probability/basic_probability", "extended_slug": "math/probability/independent-dependent-probability/basic_probability", "kind": "Topic", "slug": "basic_probability"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/independent-dependent-probability/addition_rule_probability/", "id": "addition_rule_probability", "hide": false, "title": "Venn diagrams and adding probabilities", "child_data": [{"kind": "Video", "id": "185786264"}, {"kind": "Video", "id": "188066789"}, {"kind": "Exercise", "id": "x95059985"}], "children": [{"path": "khan/math/probability/independent-dependent-probability/addition_rule_probability/probability-with-playing-cards-and-venn-diagrams/", "id": "obZzOq_wSCg", "title": "Probability with playing cards and Venn diagrams", "kind": "Video", "description": "Probability of compound events. The Addition Rule. Common Core Standard 457 S-CP.7", "slug": "probability-with-playing-cards-and-venn-diagrams"}, {"path": "khan/math/probability/independent-dependent-probability/addition_rule_probability/addition-rule-for-probability/", "id": "QE2uR6Z-NcU", "title": "Addition rule for probability", "kind": "Video", "description": "Venn diagrams and the addition rule for probability", "slug": "addition-rule-for-probability"}, {"path": "khan/math/probability/independent-dependent-probability/addition_rule_probability/adding-probability/", "id": "adding-probability", "title": "Adding probabilities", "slug": "adding-probability", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What is the probability of getting a diamond or an ace from a deck of cards? Well I could get a diamond that is not an ace, an ace that is not a diamond, or the ace of diamonds. This tutorial helps us think these types of situations through a bit better (especially with the help of our good friend, the Venn diagram).", "node_slug": "addition_rule_probability", "render_type": "Tutorial", "topic_page_url": "/math/probability/independent-dependent-probability/addition_rule_probability", "extended_slug": "math/probability/independent-dependent-probability/addition_rule_probability", "kind": "Topic", "slug": "addition_rule_probability"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/independent-dependent-probability/independent_events/", "id": "independent_events", "hide": false, "title": "Compound, independent events", "child_data": [{"kind": "Video", "id": "191769945"}, {"kind": "Video", "id": "191769946"}, {"kind": "Video", "id": "27092"}, {"kind": "Video", "id": "753767269"}, {"kind": "Video", "id": "1022209423"}, {"kind": "Video", "id": "191769947"}, {"kind": "Video", "id": "27095"}, {"kind": "Video", "id": "27096"}, {"kind": "Exercise", "id": "757444186"}, {"kind": "Exercise", "id": "x6ec3cabf"}], "children": [{"path": "khan/math/probability/independent-dependent-probability/independent_events/compound-probability-of-independent-events/", "id": "xSc4oLA9e8o", "title": "Compound probability of independent events", "kind": "Video", "description": "You'll become familiar with the concept of independent events, or that one event in no way affects what happens in the second event. Keep in mind, too, that the sum of the probabilities of all the possible events should equal 1.", "slug": "compound-probability-of-independent-events"}, {"path": "khan/math/probability/independent-dependent-probability/independent_events/getting-at-least-one-heads/", "id": "mkyZ45KQYi4", "title": "Coin flipping probability", "kind": "Video", "description": "In this video, we 'll explore the probability of getting at least one heads in multiple flips of a fair coin.", "slug": "getting-at-least-one-heads"}, {"path": "khan/math/probability/independent-dependent-probability/independent_events/events-and-outcomes-2/", "id": "O4Qnsubo2tg", "title": "Die rolling probability", "kind": "Video", "description": "We're thinking about the probability of rolling doubles on a pair of dice. Let's create a grid of all possible outcomes.", "slug": "events-and-outcomes-2"}, {"path": "khan/math/probability/independent-dependent-probability/independent_events/lebron-asks-about-the-chances-of-making-10-free-throws/", "id": "iMqCSgqzmiQ", "title": "Free throwing probability", "kind": "Video", "description": "Our friend and Cleveland Cavalier, LeBron James, asks Sal how to determine the probability of making 10 free throws in a row. Hint: the answer is surprising!", "slug": "lebron-asks-about-the-chances-of-making-10-free-throws"}, {"path": "khan/math/probability/independent-dependent-probability/independent_events/lebron-asks-about-free-throws-versus-three-pointers/", "id": "PddbEVNMgTY", "title": "Three pointer vs free throwing probability", "kind": "Video", "description": "Our friend and Cleveland Cavalier, LeBron James, asks Sal if there's a high probability of making three free throws in a row or one three-pointer. Before solving the problem, jot down what you think the answer will be!", "slug": "lebron-asks-about-free-throws-versus-three-pointers"}, {"path": "khan/math/probability/independent-dependent-probability/independent_events/frequency-probability-and-unfair-coins/", "id": "RI874OSJp1U", "title": "Probability without equally likely events", "kind": "Video", "description": "Up until now, we've looked at probabilities surrounding only equally likely events. What about probabilities when we don't have equally likely events? Say, we have unfair coins?", "slug": "frequency-probability-and-unfair-coins"}, {"path": "khan/math/probability/independent-dependent-probability/independent_events/independent-events-2/", "id": "VWAfEbgf1Po", "title": "Test taking probability and independent events", "kind": "Video", "description": "Have you ever taken a test and discovered you have no choice but to guess on a couple of problems? In this example problem, we are considering the probability of two independent events occurring.", "slug": "independent-events-2"}, {"path": "khan/math/probability/independent-dependent-probability/independent_events/independent-events-3/", "id": "2MYA8Ba2PvM", "title": "Die rolling probability with independent events", "kind": "Video", "description": "We hope you're not a gambler, but if you had to bet on whether you can roll even numbers three times in a row, you might want to figure this probability first.", "slug": "independent-events-3"}, {"path": "khan/math/probability/independent-dependent-probability/independent_events/independent_probability/", "id": "independent_probability", "title": "Independent probability", "slug": "independent_probability", "kind": "Exercise"}, {"path": "khan/math/probability/independent-dependent-probability/independent_events/compound-events/", "id": "compound-events", "title": "Probabilities of compound events", "description": "Practice using sample space diagrams to find probabilities.", "slug": "compound-events", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What is the probability of making three free throws in a row (LeBron literally asks this in this tutorial).\n\nIn this tutorial, we'll explore compound events happening where the probability of one event is not dependent on the outcome of another (compound, independent, events).", "node_slug": "independent_events", "render_type": "Tutorial", "topic_page_url": "/math/probability/independent-dependent-probability/independent_events", "extended_slug": "math/probability/independent-dependent-probability/independent_events", "kind": "Topic", "slug": "independent_events"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/independent-dependent-probability/dependent_probability/", "id": "dependent_probability", "hide": false, "title": "Dependent probability", "child_data": [{"kind": "Video", "id": "1200026245"}, {"kind": "Video", "id": "94879656"}, {"kind": "Video", "id": "94879657"}, {"kind": "Video", "id": "27094"}, {"kind": "Video", "id": "xfd725922"}, {"kind": "Exercise", "id": "x3ab7cb8e"}, {"kind": "Exercise", "id": "13179407"}, {"kind": "Video", "id": "x850f9277"}, {"kind": "Video", "id": "xcbc59718"}, {"kind": "Exercise", "id": "x328e742d"}, {"kind": "Video", "id": "878209052"}], "children": [{"path": "khan/math/probability/independent-dependent-probability/dependent_probability/introduction-to-dependent-probability/", "id": "VjLEoo3hIoM", "title": "Dependent probability introduction", "kind": "Video", "description": "Let's get you started with a great explanation of dependent probability using a scenario involving a casino game.", "slug": "introduction-to-dependent-probability"}, {"path": "khan/math/probability/independent-dependent-probability/dependent_probability/dependent-probability-example-1/", "id": "xPUm5SUVzTE", "title": "Dependent probability example", "kind": "Video", "description": "We're thinking about how the probability of an event can be dependent on another event occuring in this example problem.", "slug": "dependent-probability-example-1"}, {"path": "khan/math/probability/independent-dependent-probability/dependent_probability/dependent-probability-example-2/", "id": "7BkcNLOf56w", "title": "Dependent probability example 2", "kind": "Video", "description": "It's important to practice these probability problems as they get more complex eventually. Take a stab on this one...with our help, of course.", "slug": "dependent-probability-example-2"}, {"path": "khan/math/probability/independent-dependent-probability/dependent_probability/independent-events-1/", "id": "Za7G_eWKiF4", "title": "Independent or dependent probability event?", "kind": "Video", "description": "This time around we're not going to tell you whether we're working on a dependent or independent probability event problem. You tell us!", "slug": "independent-events-1"}, {"path": "khan/math/probability/independent-dependent-probability/dependent_probability/independent-dependent-probability/", "id": "R-NeYKSEqns", "title": "Analyzing event probability for independence", "kind": "Video", "slug": "independent-dependent-probability"}, {"path": "khan/math/probability/independent-dependent-probability/dependent_probability/identifying-dependent-and-independent-events/", "id": "identifying-dependent-and-independent-events", "title": "Identifying dependent and independent events", "slug": "identifying-dependent-and-independent-events", "kind": "Exercise"}, {"path": "khan/math/probability/independent-dependent-probability/dependent_probability/dependent_probability/", "id": "dependent_probability", "title": "Dependent probability", "slug": "dependent_probability", "kind": "Exercise"}, {"path": "khan/math/probability/independent-dependent-probability/dependent_probability/analyzing-dependent-probability/", "id": "8iKsY8C5VW8", "title": "Analyzing dependent probability", "kind": "Video", "slug": "analyzing-dependent-probability"}, {"path": "khan/math/probability/independent-dependent-probability/dependent_probability/calculating-conditional-probability/", "id": "6xPkG2pA-TU", "title": "Calculating conditional probability", "kind": "Video", "slug": "calculating-conditional-probability"}, {"path": "khan/math/probability/independent-dependent-probability/dependent_probability/multiplying-dependent-probabilities/", "id": "multiplying-dependent-probabilities", "title": "Multiplying dependent probabilities", "slug": "multiplying-dependent-probabilities", "kind": "Exercise"}, {"path": "khan/math/probability/independent-dependent-probability/dependent_probability/monty-hall-problem/", "id": "Xp6V_lO1ZKA", "title": "Probability and the Monty Hall problem", "kind": "Video", "description": "Here we have a presentation and analysis of the famous thought experiment: the \"Monty Hall\" problem! This is fun.", "slug": "monty-hall-problem"}], "in_knowledge_map": false, "description": "What's the probability of picking two \"e\" from the bag in scrabble (assuming that I don't replace the tiles). Well, the probability of picking an 'e' on your second try depends on what happened in the first (if you picked an 'e' the first time around, then there is one less 'e' in the bag). This is just one of many, many type of scenarios involving dependent probability.", "node_slug": "dependent_probability", "render_type": "Tutorial", "topic_page_url": "/math/probability/independent-dependent-probability/dependent_probability", "extended_slug": "math/probability/independent-dependent-probability/dependent_probability", "kind": "Topic", "slug": "dependent_probability"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/independent-dependent-probability/basic_set_operations/", "id": "basic_set_operations", "hide": false, "title": "Basic set operations", "child_data": [{"kind": "Video", "id": "x99efa12b"}, {"kind": "Video", "id": "x4cc5bca0"}, {"kind": "Video", "id": "x66808e41"}, {"kind": "Video", "id": "xf762eb2f"}, {"kind": "Video", "id": "x614a90bd"}, {"kind": "Exercise", "id": "x49c98e85"}], "children": [{"path": "khan/math/probability/independent-dependent-probability/basic_set_operations/intersection-and-union-of-sets/", "id": "jAfNg3ylZAI", "title": "Intersection and union of sets", "kind": "Video", "slug": "intersection-and-union-of-sets"}, {"path": "khan/math/probability/independent-dependent-probability/basic_set_operations/relative-complement-or-difference-between-sets/", "id": "2B4EBvVvf9w", "title": "Relative complement or difference between sets", "kind": "Video", "slug": "relative-complement-or-difference-between-sets"}, {"path": "khan/math/probability/independent-dependent-probability/basic_set_operations/universal-set-and-absolute-complement/", "id": "GVZUpOm3XUg", "title": "Universal set and absolute complement", "kind": "Video", "slug": "universal-set-and-absolute-complement"}, {"path": "khan/math/probability/independent-dependent-probability/basic_set_operations/subset-strict-subset-and-superset/", "id": "1wsF9GpGd00", "title": "Subset, strict subset, and superset", "kind": "Video", "slug": "subset-strict-subset-and-superset"}, {"path": "khan/math/probability/independent-dependent-probability/basic_set_operations/bringing-the-set-operations-together/", "id": "OCNXS_m1HWU", "title": "Bringing the set operations together", "kind": "Video", "slug": "bringing-the-set-operations-together"}, {"path": "khan/math/probability/independent-dependent-probability/basic_set_operations/basic_set_notation/", "id": "basic_set_notation", "title": "Basic set notation", "description": "The union, complement, and intersection of sets.", "slug": "basic_set_notation", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Whether you are learning computer science, logic, or probability (or a bunch of other things), it can be very, very useful to have this \"set\" of skills. From what a set is to how we can operate on them, this tutorial will have you familiar with the basics of sets!", "node_slug": "basic_set_operations", "render_type": "Tutorial", "topic_page_url": "/math/probability/independent-dependent-probability/basic_set_operations", "extended_slug": "math/probability/independent-dependent-probability/basic_set_operations", "kind": "Topic", "slug": "basic_set_operations"}], "in_knowledge_map": false, "description": "Introduction to probability. Independent and dependent events. Compound events. Mutual exclusive events. Addition rule for probability.", "node_slug": "independent-dependent-probability", "render_type": "Topic", "topic_page_url": "/math/probability/independent-dependent-probability", "extended_slug": "math/probability/independent-dependent-probability", "kind": "Topic", "slug": "independent-dependent-probability"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/probability/probability-and-combinatorics-topic/", "id": "probability-and-combinatorics-topic", "hide": false, "title": "Probability and combinatorics", "child_data": [{"kind": "Topic", "id": "x4324959d"}, {"kind": "Topic", "id": "xa94e9461"}, {"kind": "Topic", "id": "xf330a3df"}, {"kind": "Topic", "id": "x17a5fb14"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/probability-and-combinatorics-topic/permutations/", "id": "permutations", "hide": false, "title": "Permutations", "child_data": [{"kind": "Video", "id": "xc7e724ce"}, {"kind": "Video", "id": "x26c39251"}, {"kind": "Video", "id": "x66bfedb8"}, {"kind": "Video", "id": "xdb036a16"}, {"kind": "Video", "id": "27097"}, {"kind": "Video", "id": "27098"}, {"kind": "Exercise", "id": "917305998"}], "children": [{"path": "khan/math/probability/probability-and-combinatorics-topic/permutations/factorial-and-counting-seat-arrangements/", "id": "Z1zdkcwosD4", "title": "Factorial and counting seat arrangements", "kind": "Video", "slug": "factorial-and-counting-seat-arrangements"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/permutations/permutation-formula/", "id": "DROZVHObeko", "title": "Permutation formula", "kind": "Video", "slug": "permutation-formula"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/permutations/possible-three-letter-words/", "id": "VYbqG2NuOo8", "title": "Possible three letter words", "kind": "Video", "slug": "possible-three-letter-words"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/permutations/zero-factorial-or-0/", "id": "HGoZfzz6dU0", "title": "Zero factorial or 0!", "kind": "Video", "slug": "zero-factorial-or-0"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/permutations/permutations-and-combinations-1/", "id": "oQpKtm5TtxU", "title": "Example: Ways to arrange colors", "kind": "Video", "description": "Thinking about how many ways you can pick four colors from a group of 6", "slug": "permutations-and-combinations-1"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/permutations/permutations-and-combinations-2/", "id": "v9NLtiVt3XY", "title": "Example: Ways to pick officers", "kind": "Video", "description": "How many ways can we pick officers for our organization?", "slug": "permutations-and-combinations-2"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/permutations/permutations_1/", "id": "permutations_1", "title": "Permutations", "description": "Introductory permutation problems.", "slug": "permutations_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You want to display your Chuck Norris dolls on your desk at school and there is only room for five of them. Unfortunately, you own 50. How many ways can you pick the dolls and arrange them on your desk?", "node_slug": "permutations", "render_type": "Tutorial", "topic_page_url": "/math/probability/probability-and-combinatorics-topic/permutations", "extended_slug": "math/probability/probability-and-combinatorics-topic/permutations", "kind": "Topic", "slug": "permutations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/probability-and-combinatorics-topic/combinations-combinatorics/", "id": "combinations-combinatorics", "hide": false, "title": "Combinations", "child_data": [{"kind": "Video", "id": "xe7fa4091"}, {"kind": "Video", "id": "x4a534332"}, {"kind": "Video", "id": "x70c33285"}, {"kind": "Video", "id": "27099"}, {"kind": "Exercise", "id": "937485754"}, {"kind": "Exercise", "id": "937561152"}], "children": [{"path": "khan/math/probability/probability-and-combinatorics-topic/combinations-combinatorics/introduction-to-combinations/", "id": "iKy-d5_erhI", "title": "Introduction to combinations", "kind": "Video", "slug": "introduction-to-combinations"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/combinations-combinatorics/combination-formula/", "id": "p8vIcmr_Pqo", "title": "Combination formula", "kind": "Video", "slug": "combination-formula"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/combinations-combinatorics/handshaking-combinations/", "id": "boH4l1SgJbM", "title": "Handshaking combinations", "kind": "Video", "slug": "handshaking-combinations"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/combinations-combinatorics/permutations-and-combinations-3/", "id": "SbpoyXTpC84", "title": "Example: 9 card hands", "kind": "Video", "description": "Thinking about how many ways we can construct a hand of 9 cards", "slug": "permutations-and-combinations-3"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/combinations-combinatorics/combinations_1/", "id": "combinations_1", "title": "Combinations", "description": "Introductory combination problems", "slug": "combinations_1", "kind": "Exercise"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/combinations-combinatorics/permutations_and_combinations_2/", "id": "permutations_and_combinations_2", "title": "Permutations and combinations", "description": "Permutations and Combinations with overcounting", "slug": "permutations_and_combinations_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You are already familiar with calculating permutation (\"How many ways could 7 different people sit in 4 different seats?\"). But what if you didn't care about which seat they sat in? What if you just cared about which 4 people were in the car? Or put another way, you want to know how many combinations of 4 people can you stick in the car from a pool of 7 candidates. Or how many ways are there to choose 4 things from a pool of 7? Look no further than this tutorial to answer your questions.", "node_slug": "combinations-combinatorics", "render_type": "Tutorial", "topic_page_url": "/math/probability/probability-and-combinatorics-topic/combinations-combinatorics", "extended_slug": "math/probability/probability-and-combinatorics-topic/combinations-combinatorics", "kind": "Topic", "slug": "combinations-combinatorics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/", "id": "probability_combinatorics", "hide": false, "title": "Probability using combinatorics", "child_data": [{"kind": "Video", "id": "27093"}, {"kind": "Video", "id": "380860449"}, {"kind": "Video", "id": "193210641"}, {"kind": "Video", "id": "25853"}, {"kind": "Video", "id": "25851"}, {"kind": "Video", "id": "193210640"}, {"kind": "Video", "id": "27101"}, {"kind": "Video", "id": "27102"}, {"kind": "Video", "id": "27100"}, {"kind": "Video", "id": "690344673"}, {"kind": "Video", "id": "193210639"}, {"kind": "Video", "id": "25855"}, {"kind": "Video", "id": "1317894497"}, {"kind": "Video", "id": "25857"}, {"kind": "Exercise", "id": "956845911"}], "children": [{"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/events-and-outcomes-3/", "id": "3_otNr9kRuY", "title": "Example: Probability through counting outcomes", "kind": "Video", "description": "The probability of getting exactly 2 heads when flipping three coins. Thinking about this by visualy depicting all of the outcomes.", "slug": "events-and-outcomes-3"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/coin-flipping-example/", "id": "3UlE8gyKbkU", "title": "Example: All the ways you can flip a coin", "kind": "Video", "description": "Manually going through the combinatorics to determine the probability of an event occuring", "slug": "coin-flipping-example"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/getting-exactly-two-heads-combinatorics/", "id": "8TIben0bJpU", "title": "Getting exactly two heads (combinatorics)", "kind": "Video", "description": "A different way to think about the probability of getting 2 heads in 4 flips", "slug": "getting-exactly-two-heads-combinatorics"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/probability-and-combinations-part-2/", "id": "W7DmsJKLoxc", "title": "Probability and combinations (part 2)", "kind": "Video", "description": "Making at least 3 out of 5 free throws.", "slug": "probability-and-combinations-part-2"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/probability-using-combinations/", "id": "Xqfcy1rqMbI", "title": "Probability using combinations", "kind": "Video", "description": "Probability of getting exactly 3 heads in 8 flips of a fair coin.", "slug": "probability-using-combinations"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/exactly-three-heads-in-five-flips/", "id": "udG9KhNMKJw", "title": "Exactly three heads in five flips", "kind": "Video", "description": "Probability of exactly 3 heads in 5 flips using combinations", "slug": "exactly-three-heads-in-five-flips"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/probability-of-dependent-events/", "id": "l9ft9jpriNA", "title": "Example: Different ways to pick officers", "kind": "Video", "description": "Thinking about the different ways we can pick officers in order to find the probability of one situation in particular.", "slug": "probability-of-dependent-events"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/probability-of-dependent-events-2/", "id": "ccrYD6iX_SY", "title": "Example: Combinatorics and probability", "kind": "Video", "description": "Probability of getting a set of cards", "slug": "probability-of-dependent-events-2"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/permutations-and-combinations-4/", "id": "DIjlllgq3dc", "title": "Example: Lottery probability", "kind": "Video", "description": "What is the probability of winning a 4-number lottery?", "slug": "permutations-and-combinations-4"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/mega-millions-jackpot-probability/", "id": "gyqodNhM3EU", "title": "Mega millions jackpot probability", "kind": "Video", "description": "Probability of winning the Mega Millions jackpot", "slug": "mega-millions-jackpot-probability"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/generalizing-with-binomial-coefficients-bit-advanced/", "id": "AOsWph2FNLw", "title": "Generalizing with binomial coefficients (bit advanced)", "kind": "Video", "description": "Conceptual understanding of where the formula for binomial coefficients come from", "slug": "generalizing-with-binomial-coefficients-bit-advanced"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/conditional-probability-and-combinations/", "id": "xw6utjoyMi4", "title": "Conditional probability and combinations", "kind": "Video", "description": "Probability that I picked a fair coin given that I flipped 4 out of 6 heads.", "slug": "conditional-probability-and-combinations"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/bayes-theorem-visualized/", "id": "Zxm4Xxvzohk", "title": "Conditional probability warmup", "kind": "Video", "description": "Conditional probability visualized using trees.", "slug": "bayes-theorem-visualized"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/birthday-probability-problem/", "id": "9G0w61pZPig", "title": "Birthday probability problem", "kind": "Video", "description": "The probability that at least 2 people in a room of 30 share the same birthday.", "slug": "birthday-probability-problem"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/probability_combinatorics/probability_with_perm_comb/", "id": "probability_with_perm_comb", "title": "Probability with permutations and combinations", "description": "Probability questions using permutations and combinations of objects", "slug": "probability_with_perm_comb", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial will apply the permutation and combination tools you learned in the last tutorial to problems of probability. You'll finally learn that there may be better \"investments\" than poring all your money into the Powerball Lottery.", "node_slug": "probability_combinatorics", "render_type": "Tutorial", "topic_page_url": "/math/probability/probability-and-combinatorics-topic/probability_combinatorics", "extended_slug": "math/probability/probability-and-combinatorics-topic/probability_combinatorics", "kind": "Topic", "slug": "probability_combinatorics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/probability-and-combinatorics-topic/decisions-with-probability/", "id": "decisions-with-probability", "hide": false, "title": "Making decisions with probability", "child_data": [{"kind": "Video", "id": "xb0f85f82"}, {"kind": "Video", "id": "xe84952a8"}, {"kind": "Exercise", "id": "xebe75e53"}, {"kind": "Video", "id": "x9ecaa35a"}, {"kind": "Exercise", "id": "x6b03eead"}], "children": [{"path": "khan/math/probability/probability-and-combinatorics-topic/decisions-with-probability/simple-hypothesis-testing/", "id": "5D1gV37bKXY", "title": "Simple hypothesis testing", "kind": "Video", "slug": "simple-hypothesis-testing"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/decisions-with-probability/idea-behind-hypothesis-testing/", "id": "dpGmVV0-4jc", "title": "Idea behind hypothesis testing", "kind": "Video", "slug": "idea-behind-hypothesis-testing"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/decisions-with-probability/hypothesis-testing-with-simulations/", "id": "hypothesis-testing-with-simulations", "title": "Simple hypothesis testing", "slug": "hypothesis-testing-with-simulations", "kind": "Exercise"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/decisions-with-probability/probability-decisions/", "id": "vst006REeTQ", "title": "Picking fairly", "kind": "Video", "slug": "probability-decisions"}, {"path": "khan/math/probability/probability-and-combinatorics-topic/decisions-with-probability/using-probability-to-make-fair-decisions/", "id": "using-probability-to-make-fair-decisions", "title": "Using probability to make fair decisions", "slug": "using-probability-to-make-fair-decisions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "decisions-with-probability", "render_type": "Tutorial", "topic_page_url": "/math/probability/probability-and-combinatorics-topic/decisions-with-probability", "extended_slug": "math/probability/probability-and-combinatorics-topic/decisions-with-probability", "kind": "Topic", "slug": "decisions-with-probability"}], "in_knowledge_map": false, "description": "Permutations and combinations. Using combinatorics to solve questions in probability.", "node_slug": "probability-and-combinatorics-topic", "render_type": "Topic", "topic_page_url": "/math/probability/probability-and-combinatorics-topic", "extended_slug": "math/probability/probability-and-combinatorics-topic", "kind": "Topic", "slug": "probability-and-combinatorics-topic"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/probability/statistical-studies/", "id": "statistical-studies", "hide": false, "title": "Statistical studies", "child_data": [{"kind": "Topic", "id": "x1a1bbbd3"}, {"kind": "Topic", "id": "xa3eb0ac8"}, {"kind": "Topic", "id": "xe2bb7740"}, {"kind": "Topic", "id": "x35fee939"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/statistical-studies/statistical-questions/", "id": "statistical-questions", "hide": false, "title": "Statistical questions", "child_data": [{"kind": "Video", "id": "x875b9f8c"}, {"kind": "Exercise", "id": "x0ad1a4ef"}, {"kind": "Video", "id": "26173"}, {"kind": "Video", "id": "x6db9c771"}, {"kind": "Exercise", "id": "x18a99f47"}], "children": [{"path": "khan/math/probability/statistical-studies/statistical-questions/statistical-questions/", "id": "qyYSQDcSNlY", "title": "Statistical and non statistical questions", "kind": "Video", "description": "Here's the thing to ask when determining if you have a statistical and non-statistical question on your hand: Is there variability involved? Watch and we'll explain.", "slug": "statistical-questions"}, {"path": "khan/math/probability/statistical-studies/statistical-questions/statistical-questions_1/", "id": "statistical-questions", "title": "Statistical questions", "description": "Practice spotting the difference between statistical and non-statistical questions.", "slug": "statistical-questions_1", "kind": "Exercise"}, {"path": "khan/math/probability/statistical-studies/statistical-questions/statistics-sample-vs-population-mean/", "id": "k5EbijWu-Ss", "title": "Inferring population mean from sample mean", "kind": "Video", "description": "Much of statistics is based upon using data from a random sample that is representative of the population at large. From that sample mean, we can infer things about the greater population mean. We'll explain.", "slug": "statistics-sample-vs-population-mean"}, {"path": "khan/math/probability/statistical-studies/statistical-questions/reasonable-samples/", "id": "aKAw-DyZa6g", "title": "Reasonable samples", "kind": "Video", "description": "To make a valid conclusion, you'll need a representaive, not skewed, sample.", "slug": "reasonable-samples"}, {"path": "khan/math/probability/statistical-studies/statistical-questions/valid-claims/", "id": "valid-claims", "title": "Valid claims", "description": "Practice figuring out whether we took a random sample and whether we're able to draw valid conclusions from our data.", "slug": "valid-claims", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "statistical-questions", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistical-studies/statistical-questions", "extended_slug": "math/probability/statistical-studies/statistical-questions", "kind": "Topic", "slug": "statistical-questions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/statistical-studies/types-of-studies/", "id": "types-of-studies", "hide": false, "title": "Types of statistical studies", "child_data": [{"kind": "Video", "id": "xdf317e8d"}, {"kind": "Video", "id": "203846247"}, {"kind": "Video", "id": "x177c39f1"}, {"kind": "Exercise", "id": "x0d9ef673"}], "children": [{"path": "khan/math/probability/statistical-studies/types-of-studies/types-statistical-studies/", "id": "z-Qi4w6Xkuc", "title": "Types of statistical studies", "kind": "Video", "slug": "types-statistical-studies"}, {"path": "khan/math/probability/statistical-studies/types-of-studies/correlation-and-causality/", "id": "ROpbdO-gRUo", "title": "Correlation and causality", "kind": "Video", "description": "Understanding why correlation does not imply causality (even though many in the press and some researchers often imply otherwise)", "slug": "correlation-and-causality"}, {"path": "khan/math/probability/statistical-studies/types-of-studies/analyzing-statistical-study/", "id": "RQPC_rUvHas", "title": "Appropriate statistical study example", "kind": "Video", "slug": "analyzing-statistical-study"}, {"path": "khan/math/probability/statistical-studies/types-of-studies/types-of-statistical-studies/", "id": "types-of-statistical-studies", "title": "Types of statistical studies", "slug": "types-of-statistical-studies", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "types-of-studies", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistical-studies/types-of-studies", "extended_slug": "math/probability/statistical-studies/types-of-studies", "kind": "Topic", "slug": "types-of-studies"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/statistical-studies/hypothesis-test/", "id": "hypothesis-test", "hide": false, "title": "Hypothesis testing", "child_data": [{"kind": "Video", "id": "xb0f85f82"}, {"kind": "Exercise", "id": "xebe75e53"}, {"kind": "Video", "id": "xfcac80a7"}, {"kind": "Video", "id": "x5e1b1135"}, {"kind": "Exercise", "id": "x4a690c87"}], "children": [{"path": "khan/math/probability/statistical-studies/hypothesis-test/simple-hypothesis-testing/", "id": "5D1gV37bKXY", "title": "Simple hypothesis testing", "kind": "Video", "slug": "simple-hypothesis-testing"}, {"path": "khan/math/probability/statistical-studies/hypothesis-test/hypothesis-testing-with-simulations/", "id": "hypothesis-testing-with-simulations", "title": "Simple hypothesis testing", "slug": "hypothesis-testing-with-simulations", "kind": "Exercise"}, {"path": "khan/math/probability/statistical-studies/hypothesis-test/statistical-significance-experiment/", "id": "jLFeqQxGtOc", "title": "Statistical significance of experiment", "kind": "Video", "slug": "statistical-significance-experiment"}, {"path": "khan/math/probability/statistical-studies/hypothesis-test/statistical-significance-on-bus-speeds/", "id": "W3C07uH-b9o", "title": "Statistical significance on bus speeds", "kind": "Video", "slug": "statistical-significance-on-bus-speeds"}, {"path": "khan/math/probability/statistical-studies/hypothesis-test/hypothesis-testing-in-experiments/", "id": "hypothesis-testing-in-experiments", "title": "Hypothesis testing in experiments", "slug": "hypothesis-testing-in-experiments", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "hypothesis-test", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistical-studies/hypothesis-test", "extended_slug": "math/probability/statistical-studies/hypothesis-test", "kind": "Topic", "slug": "hypothesis-test"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/statistical-studies/categorical-data/", "id": "categorical-data", "hide": false, "title": "Categorical data", "child_data": [{"kind": "Video", "id": "x7f0764fa"}, {"kind": "Exercise", "id": "x0dfbf691"}, {"kind": "Video", "id": "x49a1fd7f"}, {"kind": "Video", "id": "x4a98d13d"}, {"kind": "Exercise", "id": "x9f3c9748"}], "children": [{"path": "khan/math/probability/statistical-studies/categorical-data/video-games-and-violence-bivariate-data/", "id": "ahyWUV7AwKw", "title": "Video games and violence", "kind": "Video", "slug": "video-games-and-violence-bivariate-data"}, {"path": "khan/math/probability/statistical-studies/categorical-data/frequencies-of-bivariate-data/", "id": "frequencies-of-bivariate-data", "title": "Interpreting two-way tables", "description": "Do you understand how two-way tables really work? Here's your chance to practice. Go get 'em! You got this!", "slug": "frequencies-of-bivariate-data", "kind": "Exercise"}, {"path": "khan/math/probability/statistical-studies/categorical-data/analyzing-trends-categorical-data/", "id": "TXGhMDbbnzQ", "title": "Analyzing trends in categorical data", "kind": "Video", "slug": "analyzing-trends-categorical-data"}, {"path": "khan/math/probability/statistical-studies/categorical-data/frequency-table-independent-events/", "id": "TQJQeTpH_lw", "title": "Filling out frequency table for independent events", "kind": "Video", "slug": "frequency-table-independent-events"}, {"path": "khan/math/probability/statistical-studies/categorical-data/trends-in-categorical-data/", "id": "trends-in-categorical-data", "title": "Trends in categorical data", "slug": "trends-in-categorical-data", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "categorical-data", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistical-studies/categorical-data", "extended_slug": "math/probability/statistical-studies/categorical-data", "kind": "Topic", "slug": "categorical-data"}], "in_knowledge_map": false, "description": "", "node_slug": "statistical-studies", "render_type": "Topic", "topic_page_url": "/math/probability/statistical-studies", "extended_slug": "math/probability/statistical-studies", "kind": "Topic", "slug": "statistical-studies"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/probability/descriptive-statistics/", "id": "descriptive-statistics", "hide": false, "title": "Descriptive statistics", "child_data": [{"kind": "Topic", "id": "xa63e1249"}, {"kind": "Topic", "id": "x7b6c9cd0"}, {"kind": "Topic", "id": "x0393489f"}, {"kind": "Topic", "id": "x6c7c7271"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/descriptive-statistics/central_tendency/", "id": "central_tendency", "hide": false, "title": "Measures of central tendency", "child_data": [{"kind": "Video", "id": "1152738250"}, {"kind": "Video", "id": "380854779"}, {"kind": "Exercise", "id": "5252991"}, {"kind": "Video", "id": "1254186879"}, {"kind": "Exercise", "id": "366693151"}, {"kind": "Video", "id": "x7c6716a3"}, {"kind": "Video", "id": "x3cb6dff6"}, {"kind": "Exercise", "id": "x4a70305e"}, {"kind": "Exercise", "id": "2017"}, {"kind": "Video", "id": "26173"}], "children": [{"path": "khan/math/probability/descriptive-statistics/central_tendency/statistics-intro-mean-median-and-mode/", "id": "h8EYEJ32oQ8", "title": "Statistics intro: Mean, median, and mode", "kind": "Video", "description": "This is a fantastic intro to the basics of statistics. Our focus here is to help you understand the core concepts of arithmetic mean, median, and mode.", "slug": "statistics-intro-mean-median-and-mode"}, {"path": "khan/math/probability/descriptive-statistics/central_tendency/mean-median-and-mode/", "id": "k3aKKasOmIw", "title": "Finding mean, median, and mode", "kind": "Video", "description": "Here we give you a set of numbers and then ask you to find the mean, median, and mode. It's your first opportunity to practice with us!", "slug": "mean-median-and-mode"}, {"path": "khan/math/probability/descriptive-statistics/central_tendency/mean_median_and_mode/", "id": "mean_median_and_mode", "title": "Mean, median, and mode", "slug": "mean_median_and_mode", "kind": "Exercise"}, {"path": "khan/math/probability/descriptive-statistics/central_tendency/exploring-mean-and-median-module/", "id": "n6xCyzOP900", "title": "Exploring the mean and median", "kind": "Video", "description": "Watch as we use a nifty interactive module to demonstrate how moving points along a number line can help us find the mean and median.", "slug": "exploring-mean-and-median-module"}, {"path": "khan/math/probability/descriptive-statistics/central_tendency/exploring_mean_and_median/", "id": "exploring_mean_and_median", "title": "Exploring mean and median", "description": "Practice manipulating the \"shape\" of data, and observe the impact on mean and median.", "slug": "exploring_mean_and_median", "kind": "Exercise"}, {"path": "khan/math/probability/descriptive-statistics/central_tendency/comparing-distribution-means/", "id": "pPnxPrhf6Ww", "title": "Comparing means of distributions", "kind": "Video", "slug": "comparing-distribution-means"}, {"path": "khan/math/probability/descriptive-statistics/central_tendency/comparing-means-and-medians/", "id": "eLyLbaXfJXo", "title": "Means and medians of different distributions", "kind": "Video", "slug": "comparing-means-and-medians"}, {"path": "khan/math/probability/descriptive-statistics/central_tendency/interpreting-and-comparing-data-distributions/", "id": "interpreting-and-comparing-data-distributions", "title": "Interpreting and comparing data distributions", "slug": "interpreting-and-comparing-data-distributions", "kind": "Exercise"}, {"path": "khan/math/probability/descriptive-statistics/central_tendency/average_word_problems/", "id": "average_word_problems", "title": "Average word problems", "slug": "average_word_problems", "kind": "Exercise"}, {"path": "khan/math/probability/descriptive-statistics/central_tendency/statistics-sample-vs-population-mean/", "id": "k5EbijWu-Ss", "title": "Inferring population mean from sample mean", "kind": "Video", "description": "Much of statistics is based upon using data from a random sample that is representative of the population at large. From that sample mean, we can infer things about the greater population mean. We'll explain.", "slug": "statistics-sample-vs-population-mean"}], "in_knowledge_map": false, "description": "This is the foundational tutorial for the rest of statistics. We start thinking about how you can represent a set of numbers with one number that somehow represents the \"center\". We then talk about the differences between populations, samples, parameters and statistics.", "node_slug": "central_tendency", "render_type": "Tutorial", "topic_page_url": "/math/probability/descriptive-statistics/central_tendency", "extended_slug": "math/probability/descriptive-statistics/central_tendency", "kind": "Topic", "slug": "central_tendency"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/descriptive-statistics/box-and-whisker-plots/", "id": "box-and-whisker-plots", "hide": false, "title": "Box-and-whisker plots", "child_data": [{"kind": "Video", "id": "380860448"}, {"kind": "Video", "id": "1164226773"}, {"kind": "Exercise", "id": "458480641"}, {"kind": "Video", "id": "380854781"}, {"kind": "Exercise", "id": "xe7faa189"}], "children": [{"path": "khan/math/probability/descriptive-statistics/box-and-whisker-plots/reading-box-and-whisker-plots/", "id": "b2C9I8HuCe4", "title": "Box and whisker plot", "kind": "Video", "description": "Is this some kind of cute cat video? No! Box and whisker plots seek to explain data by showing a spread of all the data points in a sample. The \"whiskers\" are the two opposite ends of the data. This video is more fun than a handful of catnip.", "slug": "reading-box-and-whisker-plots"}, {"path": "khan/math/probability/descriptive-statistics/box-and-whisker-plots/constructing-a-box-and-whisker-plot/", "id": "09Cx7xuIXig", "title": "Constructing a box and whisker plot", "kind": "Video", "description": "Here's a word problem that's perfectly suited for a box and whiskers plot to help analyze data. Let's construct one together, shall we?", "slug": "constructing-a-box-and-whisker-plot"}, {"path": "khan/math/probability/descriptive-statistics/box-and-whisker-plots/creating_box_and_whisker_plots/", "id": "creating_box_and_whisker_plots", "title": "Creating box plots 1", "description": "Practice making box plots to summarize data sets.", "slug": "creating_box_and_whisker_plots", "kind": "Exercise"}, {"path": "khan/math/probability/descriptive-statistics/box-and-whisker-plots/range-and-mid-range/", "id": "7DtWXEPB_AI", "title": "Finding the range and mid-range", "kind": "Video", "description": "The range is the difference between the largest and smallest numbers. The midrange is the average of the largest and smallest number. Practice with this problem.", "slug": "range-and-mid-range"}, {"path": "khan/math/probability/descriptive-statistics/box-and-whisker-plots/analyzing-data-with-box-plots/", "id": "analyzing-data-with-box-plots", "title": "Reading box plots", "description": "Practice reading information presented in box plots.", "slug": "analyzing-data-with-box-plots", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Whether you're looking at scientific data or stock price charts, box-and-whisker plots can show up in your life. This tutorial covers what they are, how to read them and how to construct them. We'd consider this tutorial very optional, but it is a good application of dealing with medians and ranges.", "node_slug": "box-and-whisker-plots", "render_type": "Tutorial", "topic_page_url": "/math/probability/descriptive-statistics/box-and-whisker-plots", "extended_slug": "math/probability/descriptive-statistics/box-and-whisker-plots", "kind": "Topic", "slug": "box-and-whisker-plots"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/descriptive-statistics/variance_std_deviation/", "id": "variance_std_deviation", "hide": false, "title": "Variance and standard deviation", "child_data": [{"kind": "Video", "id": "23764"}, {"kind": "Video", "id": "1162004491"}, {"kind": "Video", "id": "1163970906"}, {"kind": "Video", "id": "1164004886"}, {"kind": "Video", "id": "1174647817"}, {"kind": "Scratchpad", "id": "1169428428"}, {"kind": "Video", "id": "1174713420"}, {"kind": "Video", "id": "1174782081"}, {"kind": "Scratchpad", "id": "1167579097"}, {"kind": "Exercise", "id": "568800448"}, {"kind": "Video", "id": "x4a3e3b6e"}, {"kind": "Video", "id": "x6ad248d1"}, {"kind": "Video", "id": "26179"}, {"kind": "Video", "id": "1254739414"}, {"kind": "Exercise", "id": "520615080"}, {"kind": "Exercise", "id": "xad6fe4cd"}, {"kind": "Exercise", "id": "520603178"}, {"kind": "Video", "id": "26181"}], "children": [{"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/range-variance-and-standard-deviation-as-measures-of-dispersion/", "id": "E4HAYd0QnRc", "title": "Range, variance and standard deviation as measures of dispersion", "kind": "Video", "slug": "range-variance-and-standard-deviation-as-measures-of-dispersion"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/variance-of-a-population/", "id": "dvoHB9djouc", "title": "Variance of a population", "kind": "Video", "description": "Variance as a measure of, on average, how far the data points in a population are from the population mean", "slug": "variance-of-a-population"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/sample-variance/", "id": "iHXdzfF7UEs", "title": "Sample variance", "kind": "Video", "description": "Thinking about how we can estimate the variance of a population by looking at the data in a sample.", "slug": "sample-variance"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/review-and-intuition-why-we-divide-by-n-1-for-the-unbiased-sample-variance/", "id": "KkaU2ur3Ymw", "title": "Review and intuition why we divide by n-1 for the unbiased sample variance", "kind": "Video", "description": "Reviewing the population mean, sample mean, population variance, sample variance and building an intuition for why we divide by n-1 for the unbiased sample variance", "slug": "review-and-intuition-why-we-divide-by-n-1-for-the-unbiased-sample-variance"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/simulation-showing-bias-in-sample-variance/", "id": "Cn0skMJ2F3c", "title": "Simulation showing bias in sample variance", "kind": "Video", "description": "Simulation by Peter Collingridge giving us a better understanding of why we divide by (n-1) when calculating the unbiased sample variance. Simulation available at: http://www.khanacademy.org/cs/challenge-unbiased-estimate-of-population-variance/1169428428", "slug": "simulation-showing-bias-in-sample-variance"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/another-simulation-giving-evidence-that-n-1-gives-us-an-unbiased-estimate-of-variance/", "id": "F2mfEldxsPI", "title": "Another simulation giving evidence that (n-1) gives us an unbiased estimate of variance", "kind": "Video", "description": "Another visualization providing evidence that dividing by n-1 truly gives an unbiased estimate of population variance. Simulation at: http://www.khanacademy.org/cs/unbiased-variance-visualization/1167453164", "slug": "another-simulation-giving-evidence-that-n-1-gives-us-an-unbiased-estimate-of-variance"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/simulation-providing-evidence-that-n-1-gives-us-unbiased-estimate/", "id": "0QS4VHPV4JA", "title": "Simulation providing evidence that (n-1) gives us unbiased estimate", "kind": "Video", "description": "Simulation by KA user tetef showing that dividing by (n-1) gives us an unbiased estimate of population variance. Simulation at: http://www.khanacademy.org/cs/will-it-converge-towards-1/1167579097", "slug": "simulation-providing-evidence-that-n-1-gives-us-unbiased-estimate"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/variance/", "id": "variance", "title": "Sample and population variance", "slug": "variance", "kind": "Exercise"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/population-standard-deviation/", "id": "PWiWkqHmum0", "title": "Population standard deviation", "kind": "Video", "slug": "population-standard-deviation"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/sample-standard-deviation-and-bias/", "id": "DNAnQBhGpRw", "title": "Sample standard deviation and bias", "kind": "Video", "slug": "sample-standard-deviation-and-bias"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/statistics-standard-deviation/", "id": "HvDqbzu0i0E", "title": "Statistics: Standard deviation", "kind": "Video", "description": "Review of what we've learned. Introduction to the standard deviation.", "slug": "statistics-standard-deviation"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/exploring-standard-deviation-1-module/", "id": "4kA-IOFwUN4", "title": "Exploring standard deviation 1 module", "kind": "Video", "description": "Ben Eater and Sal Khan talk through the Khan Academy Standard Deviation 1 Module: http://www.khanacademy.org/math/statistics/e/exploring_standard_deviation_1", "slug": "exploring-standard-deviation-1-module"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/exploring_standard_deviation_1/", "id": "exploring_standard_deviation_1", "title": "Exploring standard deviation", "slug": "exploring_standard_deviation_1", "kind": "Exercise"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/standard_deviation_of_a_population/", "id": "standard_deviation_of_a_population", "title": "Standard deviation of a population", "slug": "standard_deviation_of_a_population", "kind": "Exercise"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/standard_deviation/", "id": "standard_deviation", "title": "Sample and population standard deviation", "slug": "standard_deviation", "kind": "Exercise"}, {"path": "khan/math/probability/descriptive-statistics/variance_std_deviation/statistics-alternate-variance-formulas/", "id": "sRVGcYGjUk8", "title": "Statistics: Alternate variance formulas", "kind": "Video", "description": "Playing with the formula for variance of a population.", "slug": "statistics-alternate-variance-formulas"}], "in_knowledge_map": false, "description": "We have tools (like the arithmetic mean) to measure central tendency and are now curious about representing how much the data in a set varies from that central tendency. In this tutorial we introduce the variance and standard deviation (which is just the square root of the variance) as two commonly used tools for doing this.", "node_slug": "variance_std_deviation", "render_type": "Tutorial", "topic_page_url": "/math/probability/descriptive-statistics/variance_std_deviation", "extended_slug": "math/probability/descriptive-statistics/variance_std_deviation", "kind": "Topic", "slug": "variance_std_deviation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/probability/descriptive-statistics/old-stats-videos/", "id": "old-stats-videos", "hide": false, "title": "Sal's old statistics videos", "child_data": [{"kind": "Video", "id": "26171"}, {"kind": "Video", "id": "26175"}, {"kind": "Video", "id": "26177"}], "children": [{"path": "khan/math/probability/descriptive-statistics/old-stats-videos/statistics-the-average/", "id": "uhxtUt_-GyM", "title": "Statistics: The average", "kind": "Video", "description": "Introduction to descriptive statistics and central tendency. Ways to measure the average of a set: median, mean, mode", "slug": "statistics-the-average"}, {"path": "khan/math/probability/descriptive-statistics/old-stats-videos/statistics-variance-of-a-population/", "id": "6JFzI1DDyyk", "title": "Statistics: Variance of a population", "kind": "Video", "description": "Variance of a population.", "slug": "statistics-variance-of-a-population"}, {"path": "khan/math/probability/descriptive-statistics/old-stats-videos/statistics-sample-variance/", "id": "Qf3RMGXR-h8", "title": "Statistics: Sample variance", "kind": "Video", "description": "Using the variance of a sample to estimate the variance of a population", "slug": "statistics-sample-variance"}], "in_knowledge_map": false, "description": "This tutorial covers central tendency and dispersion. It is redundant with the other tutorials on this topic, but it has the benefit of messy handwriting and a cheap microphone. This is Sal circa 2007 so take it all with a grain of salt (or just skip it altogether).", "node_slug": "old-stats-videos", "render_type": "Tutorial", "topic_page_url": "/math/probability/descriptive-statistics/old-stats-videos", "extended_slug": "math/probability/descriptive-statistics/old-stats-videos", "kind": "Topic", "slug": "old-stats-videos"}], "in_knowledge_map": false, "description": "Measures of central tendency and dispersion. Mean, median, mode, variance, and standard deviation.", "node_slug": "descriptive-statistics", "render_type": "Topic", "topic_page_url": "/math/probability/descriptive-statistics", "extended_slug": "math/probability/descriptive-statistics", "kind": "Topic", "slug": "descriptive-statistics"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/probability/random-variables-topic/", "id": "random-variables-topic", "hide": false, "title": "Random variables and probability distributions", "child_data": [{"kind": "Topic", "id": "x1642466e"}, {"kind": "Topic", "id": "xd87bb365"}, {"kind": "Topic", "id": "x0ebf5fd7"}, {"kind": "Topic", "id": "xe6a9bae0"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/random-variables-topic/random_variables_prob_dist/", "id": "random_variables_prob_dist", "hide": false, "title": "Random variables and probability distributions", "child_data": [{"kind": "Video", "id": "1203203255"}, {"kind": "Video", "id": "1202908818"}, {"kind": "Video", "id": "x970b9601"}, {"kind": "Exercise", "id": "xbc168131"}, {"kind": "Video", "id": "25861"}], "children": [{"path": "khan/math/probability/random-variables-topic/random_variables_prob_dist/random-variables/", "id": "3v9w79NhsfI", "title": "Random variables", "kind": "Video", "description": "Basic idea and definitions of random variables", "slug": "random-variables"}, {"path": "khan/math/probability/random-variables-topic/random_variables_prob_dist/discrete-and-continuous-random-variables/", "id": "dOr0NKyD31Q", "title": "Discrete and continuous random variables", "kind": "Video", "description": "Defining discrete and continuous random variables. Working through examples of both discrete and continuous random variables.", "slug": "discrete-and-continuous-random-variables"}, {"path": "khan/math/probability/random-variables-topic/random_variables_prob_dist/discrete-probability-distribution/", "id": "cqK3uRoPtk0", "title": "Constructing a probability distribution for random variable", "kind": "Video", "slug": "discrete-probability-distribution"}, {"path": "khan/math/probability/random-variables-topic/random_variables_prob_dist/constructing-probability-distributions/", "id": "constructing-probability-distributions", "title": "Constructing probability distributions", "slug": "constructing-probability-distributions", "kind": "Exercise"}, {"path": "khan/math/probability/random-variables-topic/random_variables_prob_dist/probability-density-functions/", "id": "Fvi9A_tEmXQ", "title": "Probability density functions", "kind": "Video", "description": "Probability density functions for continuous random variables.", "slug": "probability-density-functions"}], "in_knowledge_map": false, "description": "", "node_slug": "random_variables_prob_dist", "render_type": "Tutorial", "topic_page_url": "/math/probability/random-variables-topic/random_variables_prob_dist", "extended_slug": "math/probability/random-variables-topic/random_variables_prob_dist", "kind": "Topic", "slug": "random_variables_prob_dist"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/random-variables-topic/expected-value/", "id": "expected-value", "hide": false, "title": "Expected value", "child_data": [{"kind": "Exercise", "id": "957212277"}, {"kind": "Video", "id": "65229378"}, {"kind": "Video", "id": "x63d8573a"}, {"kind": "Exercise", "id": "x84367331"}, {"kind": "Video", "id": "xf4ac78a7"}, {"kind": "Exercise", "id": "xea51d5c9"}, {"kind": "Video", "id": "xfd69eb4f"}, {"kind": "Video", "id": "xb959145f"}, {"kind": "Exercise", "id": "xc88a5a35"}, {"kind": "Video", "id": "25879"}], "children": [{"path": "khan/math/probability/random-variables-topic/expected-value/expected_value/", "id": "expected_value", "title": "Expected value", "description": "Compute the expected value given a set of outcomes, probabilities, and payoffs", "slug": "expected_value", "kind": "Exercise"}, {"path": "khan/math/probability/random-variables-topic/expected-value/term-life-insurance-and-death-probability/", "id": "NSSoMafbBqQ", "title": "Term life insurance and death probability", "kind": "Video", "description": "Understanding an insurance company's sense of my chances of dying.", "slug": "term-life-insurance-and-death-probability"}, {"path": "khan/math/probability/random-variables-topic/expected-value/empirical-data-expected-value/", "id": "gHpl5UcgRkI", "title": "Getting data from expected value", "kind": "Video", "slug": "empirical-data-expected-value"}, {"path": "khan/math/probability/random-variables-topic/expected-value/expected-value-with-empirical-probabilities/", "id": "expected-value-with-empirical-probabilities", "title": "Expected value with empirical probabilities", "slug": "expected-value-with-empirical-probabilities", "kind": "Exercise"}, {"path": "khan/math/probability/random-variables-topic/expected-value/expected-value-profit-lottery-ticket/", "id": "6vlBOHckmzU", "title": "Expected profit from lottery ticket", "kind": "Video", "slug": "expected-value-profit-lottery-ticket"}, {"path": "khan/math/probability/random-variables-topic/expected-value/expected-value-with-calculated-probabilities/", "id": "expected-value-with-calculated-probabilities", "title": "Expected value with calculated probabilities", "slug": "expected-value-with-calculated-probabilities", "kind": "Exercise"}, {"path": "khan/math/probability/random-variables-topic/expected-value/expected-value-wager/", "id": "86nb02Bx_5w", "title": "Expected value while fishing", "kind": "Video", "slug": "expected-value-wager"}, {"path": "khan/math/probability/random-variables-topic/expected-value/expected-value-insurance/", "id": "BveA7JiRGS8", "title": "Comparing insurance with expected value", "kind": "Video", "slug": "expected-value-insurance"}, {"path": "khan/math/probability/random-variables-topic/expected-value/making-decisions-with-expected-values/", "id": "making-decisions-with-expected-values", "title": "Making decisions with expected values", "slug": "making-decisions-with-expected-values", "kind": "Exercise"}, {"path": "khan/math/probability/random-variables-topic/expected-value/law-of-large-numbers/", "id": "VpuN8vCQ--M", "title": "Law of large numbers", "kind": "Video", "description": "Introduction to the law of large numbers", "slug": "law-of-large-numbers"}], "in_knowledge_map": false, "description": "Now that we know what a random variable is, we can think about expected value. As we'll see, it can be viewed as a probability-weighted average of possible outcomes!", "node_slug": "expected-value", "render_type": "Tutorial", "topic_page_url": "/math/probability/random-variables-topic/expected-value", "extended_slug": "math/probability/random-variables-topic/expected-value", "kind": "Topic", "slug": "expected-value"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/probability/random-variables-topic/binomial_distribution/", "id": "binomial_distribution", "hide": false, "title": "Binomial distribution", "child_data": [{"kind": "Video", "id": "xaf13e4df"}, {"kind": "Video", "id": "x0f59b8e3"}, {"kind": "Video", "id": "x88ef095e"}, {"kind": "Video", "id": "x0a129ac6"}, {"kind": "Video", "id": "xead3220b"}, {"kind": "Video", "id": "xba5fcceb"}, {"kind": "Video", "id": "25873"}], "children": [{"path": "khan/math/probability/random-variables-topic/binomial_distribution/binomial-distribution/", "id": "WWv0RUxDfbs", "title": "Binomial distribution", "kind": "Video", "slug": "binomial-distribution"}, {"path": "khan/math/probability/random-variables-topic/binomial_distribution/visualizing-a-binomial-distribution/", "id": "NF0lrkqXIkQ", "title": "Visualizing a binomial distribution", "kind": "Video", "slug": "visualizing-a-binomial-distribution"}, {"path": "khan/math/probability/random-variables-topic/binomial_distribution/probability-of-making-2-shots-in-6-attempts/", "id": "Ctytn4a6zjw", "title": "Probability of making 2 shots in 6 attempts", "kind": "Video", "slug": "probability-of-making-2-shots-in-6-attempts"}, {"path": "khan/math/probability/random-variables-topic/binomial_distribution/generalizing-k-scores-in-n-attempts/", "id": "efE8xuvUjAo", "title": "Generalizing k scores in n attempts", "kind": "Video", "slug": "generalizing-k-scores-in-n-attempts"}, {"path": "khan/math/probability/random-variables-topic/binomial_distribution/free-throw-binomial-probability-distribution/", "id": "eL965_Lscb8", "title": "Free throw binomial probability distribution", "kind": "Video", "slug": "free-throw-binomial-probability-distribution"}, {"path": "khan/math/probability/random-variables-topic/binomial_distribution/graphing-basketball-binomial-distribution/", "id": "y2G03Lumhe0", "title": "Graphing basketball binomial distribution", "kind": "Video", "slug": "graphing-basketball-binomial-distribution"}, {"path": "khan/math/probability/random-variables-topic/binomial_distribution/expected-value-of-binomial-distribution/", "id": "SqcxYnNlI3Y", "title": "Expected value of binomial distribution", "kind": "Video", "description": "Expected value of a binomial distributed random variable", "slug": "expected-value-of-binomial-distribution"}], "in_knowledge_map": false, "description": "", "node_slug": "binomial_distribution", "render_type": "Tutorial", "topic_page_url": "/math/probability/random-variables-topic/binomial_distribution", "extended_slug": "math/probability/random-variables-topic/binomial_distribution", "kind": "Topic", "slug": "binomial_distribution"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/probability/random-variables-topic/poisson_process/", "id": "poisson_process", "hide": false, "title": "Poisson process", "child_data": [{"kind": "Video", "id": "25875"}, {"kind": "Video", "id": "25877"}], "children": [{"path": "khan/math/probability/random-variables-topic/poisson_process/poisson-process-1/", "id": "3z-M6sbGIZ0", "title": "Poisson process 1", "kind": "Video", "description": "Introduction to Poisson Processes and the Poisson Distribution.", "slug": "poisson-process-1"}, {"path": "khan/math/probability/random-variables-topic/poisson_process/poisson-process-2/", "id": "Jkr4FSrNEVY", "title": "Poisson process 2", "kind": "Video", "description": "More of the derivation of the Poisson Distribution.", "slug": "poisson-process-2"}], "in_knowledge_map": false, "description": "", "node_slug": "poisson_process", "render_type": "Tutorial", "topic_page_url": "/math/probability/random-variables-topic/poisson_process", "extended_slug": "math/probability/random-variables-topic/poisson_process", "kind": "Topic", "slug": "poisson_process"}], "in_knowledge_map": false, "description": "Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.", "node_slug": "random-variables-topic", "render_type": "Topic", "topic_page_url": "/math/probability/random-variables-topic", "extended_slug": "math/probability/random-variables-topic", "kind": "Topic", "slug": "random-variables-topic"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/probability/regression/", "id": "regression", "hide": false, "title": "Regression", "child_data": [{"kind": "Topic", "id": "x01977bb1"}, {"kind": "Topic", "id": "x917d3451"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/regression/prob-stats-scatter-plots/", "id": "prob-stats-scatter-plots", "hide": false, "title": "Scatter plots", "child_data": [{"kind": "Video", "id": "x905613d7"}, {"kind": "Video", "id": "x95ffaffd"}, {"kind": "Exercise", "id": "x6209d2ce"}, {"kind": "Video", "id": "x486a060d"}, {"kind": "Video", "id": "xa44bf96c"}, {"kind": "Exercise", "id": "xd167ef1b"}, {"kind": "Video", "id": "x69fec2ac"}, {"kind": "Exercise", "id": "x28f4fc7f"}], "children": [{"path": "khan/math/probability/regression/prob-stats-scatter-plots/scatter-plot-interpreting/", "id": "Jpbm5YgciqI", "title": "Studying, shoe size, and test scores scatter plots", "kind": "Video", "slug": "scatter-plot-interpreting"}, {"path": "khan/math/probability/regression/prob-stats-scatter-plots/trends-in-smoking-scatter-plot/", "id": "F5uiFXECnVY", "title": "People smoking less over time scatter plot", "kind": "Video", "slug": "trends-in-smoking-scatter-plot"}, {"path": "khan/math/probability/regression/prob-stats-scatter-plots/interpreting-scatter-plots/", "id": "interpreting-scatter-plots", "title": "Interpreting scatter plots", "slug": "interpreting-scatter-plots", "kind": "Exercise"}, {"path": "khan/math/probability/regression/prob-stats-scatter-plots/constructing-scatter-plot/", "id": "sHbX58y5D4U", "title": "Constructing a scatter plot", "kind": "Video", "slug": "constructing-scatter-plot"}, {"path": "khan/math/probability/regression/prob-stats-scatter-plots/constructing-scatter-plot-exercise-example/", "id": "aT2UN7y1rhc", "title": "Constructing scatter plot exercise example", "kind": "Video", "slug": "constructing-scatter-plot-exercise-example"}, {"path": "khan/math/probability/regression/prob-stats-scatter-plots/constructing-scatter-plots/", "id": "constructing-scatter-plots", "title": "Constructing scatter plots", "description": "Practice plotting points to construct a scatter plot.", "slug": "constructing-scatter-plots", "kind": "Exercise"}, {"path": "khan/math/probability/regression/prob-stats-scatter-plots/comparing-models-to-fit-data/", "id": "2EwTHdg-xgw", "title": "Comparing models to fit data", "kind": "Video", "slug": "comparing-models-to-fit-data"}, {"path": "khan/math/probability/regression/prob-stats-scatter-plots/fitting-functions-to-scatter-plots/", "id": "fitting-functions-to-scatter-plots", "title": "Fitting quadratic and exponential functions to scatter plots", "slug": "fitting-functions-to-scatter-plots", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "prob-stats-scatter-plots", "render_type": "Tutorial", "topic_page_url": "/math/probability/regression/prob-stats-scatter-plots", "extended_slug": "math/probability/regression/prob-stats-scatter-plots", "kind": "Topic", "slug": "prob-stats-scatter-plots"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/regression/regression-correlation/", "id": "regression-correlation", "hide": false, "title": "Linear regression and correlation", "child_data": [{"kind": "Video", "id": "203846247"}, {"kind": "Video", "id": "23654"}, {"kind": "Video", "id": "x61240c40"}, {"kind": "Exercise", "id": "917310246"}, {"kind": "Exercise", "id": "x2fd3ad4e"}, {"kind": "Video", "id": "8187292"}, {"kind": "Video", "id": "8187293"}, {"kind": "Video", "id": "8187297"}, {"kind": "Video", "id": "8187294"}, {"kind": "Video", "id": "8187295"}, {"kind": "Video", "id": "8187296"}, {"kind": "Video", "id": "8187299"}, {"kind": "Video", "id": "8187298"}, {"kind": "Video", "id": "8187300"}, {"kind": "Video", "id": "8187301"}], "children": [{"path": "khan/math/probability/regression/regression-correlation/correlation-and-causality/", "id": "ROpbdO-gRUo", "title": "Correlation and causality", "kind": "Video", "description": "Understanding why correlation does not imply causality (even though many in the press and some researchers often imply otherwise)", "slug": "correlation-and-causality"}, {"path": "khan/math/probability/regression/regression-correlation/fitting-a-line-to-data/", "id": "OhUkMQtBGmE", "title": "Fitting a line to data", "kind": "Video", "slug": "fitting-a-line-to-data"}, {"path": "khan/math/probability/regression/regression-correlation/estimating-the-line-of-best-fit-exercise/", "id": "ioieTr41L24", "title": "Estimating the line of best fit exercise", "kind": "Video", "slug": "estimating-the-line-of-best-fit-exercise"}, {"path": "khan/math/probability/regression/regression-correlation/plotting_the_line_of_best_fit/", "id": "plotting_the_line_of_best_fit", "title": "Estimating the line of best fit", "description": "Given a random assortment of points, find the best fit line for them.", "slug": "plotting_the_line_of_best_fit", "kind": "Exercise"}, {"path": "khan/math/probability/regression/regression-correlation/linear-models-of-bivariate-data/", "id": "linear-models-of-bivariate-data", "title": "Linear models of bivariate data", "slug": "linear-models-of-bivariate-data", "kind": "Exercise"}, {"path": "khan/math/probability/regression/regression-correlation/squared-error-of-regression-line/", "id": "6OvhLPS7rj4", "title": "Squared error of regression line", "kind": "Video", "description": "Introduction to the idea that one can find a line that minimizes the squared distances to the points", "slug": "squared-error-of-regression-line"}, {"path": "khan/math/probability/regression/regression-correlation/proof-part-1-minimizing-squared-error-to-regression-line/", "id": "mIx2Oj5y9Q8", "title": "Proof (part 1) minimizing squared error to regression line", "kind": "Video", "description": "Proof (Part 1) Minimizing Squared Error to Regression Line", "slug": "proof-part-1-minimizing-squared-error-to-regression-line"}, {"path": "khan/math/probability/regression/regression-correlation/proof-part-2-minimizing-squared-error-to-line/", "id": "f6OnoxctvUk", "title": "Proof (part 2) minimizing squared error to regression line", "kind": "Video", "description": "Proof Part 2 Minimizing Squared Error to Line", "slug": "proof-part-2-minimizing-squared-error-to-line"}, {"path": "khan/math/probability/regression/regression-correlation/proof-part-3-minimizing-squared-error-to-regression-line/", "id": "u1HhUB3NP8g", "title": "Proof (part 3) minimizing squared error to regression line", "kind": "Video", "description": "Proof (Part 3) Minimizing Squared Error to Regression Line", "slug": "proof-part-3-minimizing-squared-error-to-regression-line"}, {"path": "khan/math/probability/regression/regression-correlation/proof-part-4-minimizing-squared-error-to-regression-line/", "id": "8RSTQl0bQuw", "title": "Proof (part 4) minimizing squared error to regression line", "kind": "Video", "description": "Proof (Part 4) Minimizing Squared Error to Regression Line", "slug": "proof-part-4-minimizing-squared-error-to-regression-line"}, {"path": "khan/math/probability/regression/regression-correlation/regression-line-example/", "id": "GAmzwIkGFgE", "title": "Regression line example", "kind": "Video", "description": "Regression Line Example", "slug": "regression-line-example"}, {"path": "khan/math/probability/regression/regression-correlation/second-regression-example/", "id": "ww_yT9ckPWw", "title": "Second regression example", "kind": "Video", "description": "Second Regression Example", "slug": "second-regression-example"}, {"path": "khan/math/probability/regression/regression-correlation/r-squared-or-coefficient-of-determination/", "id": "lng4ZgConCM", "title": "R-squared or coefficient of determination", "kind": "Video", "description": "R-Squared or Coefficient of Determination", "slug": "r-squared-or-coefficient-of-determination"}, {"path": "khan/math/probability/regression/regression-correlation/calculating-r-squared/", "id": "Fc5t_5r_7IU", "title": "Calculating R-squared", "kind": "Video", "description": "Calculating R-Squared to see how well a regression line fits data", "slug": "calculating-r-squared"}, {"path": "khan/math/probability/regression/regression-correlation/covariance-and-the-regression-line/", "id": "ualmyZiPs9w", "title": "Covariance and the regression line", "kind": "Video", "description": "Covariance, Variance and the Slope of the Regression Line", "slug": "covariance-and-the-regression-line"}], "in_knowledge_map": false, "description": "Even when there might be a rough linear relationship between two variables, the data in the real-world is never as clean as you want it to be. This tutorial helps you think about how you can best fit a line to the relationship between two variables.", "node_slug": "regression-correlation", "render_type": "Tutorial", "topic_page_url": "/math/probability/regression/regression-correlation", "extended_slug": "math/probability/regression/regression-correlation", "kind": "Topic", "slug": "regression-correlation"}], "in_knowledge_map": false, "description": "Fitting a line to points. Linear regression. R-squared.", "node_slug": "regression", "render_type": "Topic", "topic_page_url": "/math/probability/regression", "extended_slug": "math/probability/regression", "kind": "Topic", "slug": "regression"}, {"icon_src": "/images/power-mode/badges/statistics-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/probability/statistics-inferential/", "id": "statistics-inferential", "hide": false, "title": "Inferential statistics", "child_data": [{"kind": "Topic", "id": "xf67f64bc"}, {"kind": "Topic", "id": "xf9e44b70"}, {"kind": "Topic", "id": "xa06d7d05"}, {"kind": "Topic", "id": "x3a420a07"}, {"kind": "Topic", "id": "xf394fbee"}, {"kind": "Topic", "id": "x04df695d"}, {"kind": "Topic", "id": "x5b4e7f0e"}, {"kind": "Topic", "id": "xbe77e59a"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/probability/statistics-inferential/normal_distribution/", "id": "normal_distribution", "hide": false, "title": "Normal distribution", "child_data": [{"kind": "Video", "id": "26196"}, {"kind": "Video", "id": "26194"}, {"kind": "Video", "id": "26198"}, {"kind": "Video", "id": "26202"}, {"kind": "Video", "id": "26200"}, {"kind": "Video", "id": "26204"}, {"kind": "Exercise", "id": "568741839"}, {"kind": "Video", "id": "26206"}, {"kind": "Exercise", "id": "617823708"}, {"kind": "Exercise", "id": "729512830"}, {"kind": "Exercise", "id": "729503007"}], "children": [{"path": "khan/math/probability/statistics-inferential/normal_distribution/introduction-to-the-normal-distribution/", "id": "hgtMWR3TFnY", "title": "Introduction to the normal distribution", "kind": "Video", "description": "Exploring the normal distribution", "slug": "introduction-to-the-normal-distribution"}, {"path": "khan/math/probability/statistics-inferential/normal_distribution/normal-distribution-excel-exercise/", "id": "yTGEMoaWDCQ", "title": "Normal distribution excel exercise", "kind": "Video", "description": "(Long-26 minutes) Presentation on spreadsheet to show that the normal distribution approximates the binomial distribution for a large number of trials.", "slug": "normal-distribution-excel-exercise"}, {"path": "khan/math/probability/statistics-inferential/normal_distribution/ck12-org-normal-distribution-problems-qualitative-sense-of-normal-distributions/", "id": "79duxPXpyKQ", "title": "ck12.org normal distribution problems: Qualitative sense of normal distributions", "kind": "Video", "description": "Discussion of how \"normal\" a distribution might be", "slug": "ck12-org-normal-distribution-problems-qualitative-sense-of-normal-distributions"}, {"path": "khan/math/probability/statistics-inferential/normal_distribution/ck12-org-normal-distribution-problems-empirical-rule/", "id": "OhRr26AfFBU", "title": "ck12.org normal distribution problems: Empirical rule", "kind": "Video", "description": "Using the empirical rule (or 68-95-99.7 rule) to estimate probabilities for normal distributions", "slug": "ck12-org-normal-distribution-problems-empirical-rule"}, {"path": "khan/math/probability/statistics-inferential/normal_distribution/ck12-org-normal-distribution-problems-z-score/", "id": "Wp2nVIzBsE8", "title": "ck12.org normal distribution problems: z-score", "kind": "Video", "description": "Z-score practice", "slug": "ck12-org-normal-distribution-problems-z-score"}, {"path": "khan/math/probability/statistics-inferential/normal_distribution/ck12-org-exercise-standard-normal-distribution-and-the-empirical-rule/", "id": "2fzYE-Emar0", "title": "ck12.org exercise: Standard normal distribution and the empirical rule", "kind": "Video", "description": "Using the Empirical Rule with a standard normal distribution", "slug": "ck12-org-exercise-standard-normal-distribution-and-the-empirical-rule"}, {"path": "khan/math/probability/statistics-inferential/normal_distribution/empirical_rule/", "id": "empirical_rule", "title": "Empirical rule", "slug": "empirical_rule", "kind": "Exercise"}, {"path": "khan/math/probability/statistics-inferential/normal_distribution/ck12-org-more-empirical-rule-and-z-score-practice/", "id": "itQEwESWDKg", "title": "ck12.org: More empirical rule and z-score practice", "kind": "Video", "description": "More Empirical Rule and Z-score practice", "slug": "ck12-org-more-empirical-rule-and-z-score-practice"}, {"path": "khan/math/probability/statistics-inferential/normal_distribution/z_scores_1/", "id": "z_scores_1", "title": "Z-scores 1", "description": "Find the z-score of a particular measurement given the mean and standard deviation.", "slug": "z_scores_1", "kind": "Exercise"}, {"path": "khan/math/probability/statistics-inferential/normal_distribution/z_scores_2/", "id": "z_scores_2", "title": "Z-scores 2", "description": "Use a z-table to find the probability of a particular measurement.", "slug": "z_scores_2", "kind": "Exercise"}, {"path": "khan/math/probability/statistics-inferential/normal_distribution/z_scores_3/", "id": "z_scores_3", "title": "Z-scores 3", "description": "Use a z-table to find the probability that a particular measurement is in a range.", "slug": "z_scores_3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The normal distribution (often referred to as the \"bell curve\" is at the core of most of inferential statistics. By assuming that most complex processes result in a normal distribution (we'll see why this is reasonable), we can gauge the probability of it happening by chance.\n\nTo best enjoy this tutorial, it is good to come to it understanding what probability distributions and random variables are. You should also be very familiar with the notions of population and sample mean and standard deviation.", "node_slug": "normal_distribution", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistics-inferential/normal_distribution", "extended_slug": "math/probability/statistics-inferential/normal_distribution", "kind": "Topic", "slug": "normal_distribution"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/probability/statistics-inferential/sampling_distribution/", "id": "sampling_distribution", "hide": false, "title": "Sampling distribution", "child_data": [{"kind": "Video", "id": "371055"}, {"kind": "Video", "id": "411022"}, {"kind": "Video", "id": "378042"}, {"kind": "Video", "id": "397052"}, {"kind": "Video", "id": "6022796"}], "children": [{"path": "khan/math/probability/statistics-inferential/sampling_distribution/central-limit-theorem/", "id": "JNm3M9cqWyc", "title": "Central limit theorem", "kind": "Video", "description": "Introduction to the central limit theorem and the sampling distribution of the mean", "slug": "central-limit-theorem"}, {"path": "khan/math/probability/statistics-inferential/sampling_distribution/sampling-distribution-of-the-sample-mean/", "id": "FXZ2O1Lv-KE", "title": "Sampling distribution of the sample mean", "kind": "Video", "description": "The central limit theorem and the sampling distribution of the sample mean", "slug": "sampling-distribution-of-the-sample-mean"}, {"path": "khan/math/probability/statistics-inferential/sampling_distribution/sampling-distribution-of-the-sample-mean-2/", "id": "NYd6wzYkQIM", "title": "Sampling distribution of the sample mean 2", "kind": "Video", "description": "More on the Central Limit Theorem and the Sampling Distribution of the Sample Mean", "slug": "sampling-distribution-of-the-sample-mean-2"}, {"path": "khan/math/probability/statistics-inferential/sampling_distribution/standard-error-of-the-mean/", "id": "J1twbrHel3o", "title": "Standard error of the mean", "kind": "Video", "description": "Standard Error of the Mean (a.k.a. the standard deviation of the sampling distribution of the sample mean!)", "slug": "standard-error-of-the-mean"}, {"path": "khan/math/probability/statistics-inferential/sampling_distribution/sampling-distribution-example-problem/", "id": "0ZstEh_8bYc", "title": "Sampling distribution example problem", "kind": "Video", "description": "Figuring out the probability of running out of water on a camping trip", "slug": "sampling-distribution-example-problem"}], "in_knowledge_map": false, "description": "In this tutorial, we experience one of the most exciting ideas in statistics--the central limit theorem. Without it, it would be a lot harder to make any inferences about population parameters given sample statistics. It tells us that, regardless of what the population distribution looks like, the distribution of the sample means (you'll learn what that is) can be normal.\n\nGood idea to understand a bit about normal distributions before diving into this tutorial.", "node_slug": "sampling_distribution", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistics-inferential/sampling_distribution", "extended_slug": "math/probability/statistics-inferential/sampling_distribution", "kind": "Topic", "slug": "sampling_distribution"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/probability/statistics-inferential/confidence-intervals/", "id": "confidence-intervals", "hide": false, "title": "Confidence intervals", "child_data": [{"kind": "Video", "id": "6022797"}, {"kind": "Video", "id": "6022802"}, {"kind": "Video", "id": "6022803"}], "children": [{"path": "khan/math/probability/statistics-inferential/confidence-intervals/confidence-interval-1/", "id": "bekNKJoxYbQ", "title": "Confidence interval 1", "kind": "Video", "description": "Estimating the probability that the true population mean lies within a range around a sample mean.", "slug": "confidence-interval-1"}, {"path": "khan/math/probability/statistics-inferential/confidence-intervals/confidence-interval-example/", "id": "SeQeYVJZ2gE", "title": "Confidence interval example", "kind": "Video", "description": "Confidence Interval Example", "slug": "confidence-interval-example"}, {"path": "khan/math/probability/statistics-inferential/confidence-intervals/small-sample-size-confidence-intervals/", "id": "K4KDLWENXm0", "title": "Small sample size confidence intervals", "kind": "Video", "description": "Constructing small sample size confidence intervals using t-distributions", "slug": "small-sample-size-confidence-intervals"}], "in_knowledge_map": false, "description": "We all have confidence intervals (\"I'm the king of the world!!!!\") and non-confidence intervals (\"No one loves me\"). That is not what this tutorial is about.\n\nThis tutorial takes what you already know about the central limit theorem, sampling distributions, and z-scores and uses these tools to dive into the world of inferential statistics. It may seem magical at first, but from our sample, we can now make inferences about the probability of our population mean actually being in an interval.", "node_slug": "confidence-intervals", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistics-inferential/confidence-intervals", "extended_slug": "math/probability/statistics-inferential/confidence-intervals", "kind": "Topic", "slug": "confidence-intervals"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/probability/statistics-inferential/margin-of-error/", "id": "margin-of-error", "hide": false, "title": "Bernoulli distributions and margin of error", "child_data": [{"kind": "Video", "id": "6022798"}, {"kind": "Video", "id": "6022799"}, {"kind": "Video", "id": "6022800"}, {"kind": "Video", "id": "6022801"}], "children": [{"path": "khan/math/probability/statistics-inferential/margin-of-error/mean-and-variance-of-bernoulli-distribution-example/", "id": "O8vB1eInP_8", "title": "Mean and variance of Bernoulli distribution example", "kind": "Video", "description": "Mean and Variance of Bernoulli Distribution Example", "slug": "mean-and-variance-of-bernoulli-distribution-example"}, {"path": "khan/math/probability/statistics-inferential/margin-of-error/bernoulli-distribution-mean-and-variance-formulas/", "id": "ry81_iSHt6E", "title": "Bernoulli distribution mean and variance formulas", "kind": "Video", "description": "Bernoulli Distribution Mean and Variance Formulas", "slug": "bernoulli-distribution-mean-and-variance-formulas"}, {"path": "khan/math/probability/statistics-inferential/margin-of-error/margin-of-error-1/", "id": "OwPSuHXmiPw", "title": "Margin of error 1", "kind": "Video", "description": "Finding the 95% confidence interval for the proportion of a population voting for a candidate.", "slug": "margin-of-error-1"}, {"path": "khan/math/probability/statistics-inferential/margin-of-error/margin-of-error-2/", "id": "YclQE2XtaLw", "title": "Margin of error 2", "kind": "Video", "description": "Finding the 95% confidence interval for the proportion of a population voting for a candidate.", "slug": "margin-of-error-2"}], "in_knowledge_map": false, "description": "Ever wondered what pollsters are talking about when they said that there is a 3% \"margin of error\" in their results. Well, this tutorial will not only explain what it means, but give you the tools and understanding to be a pollster yourself!", "node_slug": "margin-of-error", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistics-inferential/margin-of-error", "extended_slug": "math/probability/statistics-inferential/margin-of-error", "kind": "Topic", "slug": "margin-of-error"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/probability/statistics-inferential/hypothesis-testing/", "id": "hypothesis-testing", "hide": false, "title": "Hypothesis testing with one sample", "child_data": [{"kind": "Video", "id": "6022804"}, {"kind": "Video", "id": "6022805"}, {"kind": "Video", "id": "6022807"}, {"kind": "Video", "id": "6022806"}, {"kind": "Video", "id": "6022808"}, {"kind": "Video", "id": "6022809"}, {"kind": "Video", "id": "6022810"}], "children": [{"path": "khan/math/probability/statistics-inferential/hypothesis-testing/hypothesis-testing-and-p-values/", "id": "-FtlH4svqx4", "title": "Hypothesis testing and p-values", "kind": "Video", "description": "Hypothesis Testing and P-values", "slug": "hypothesis-testing-and-p-values"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing/one-tailed-and-two-tailed-tests/", "id": "mvye6X_0upA", "title": "One-tailed and two-tailed tests", "kind": "Video", "description": "One-Tailed and Two-Tailed Tests", "slug": "one-tailed-and-two-tailed-tests"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing/type-1-errors/", "id": "EowIec7Y8HM", "title": "Type 1 errors", "kind": "Video", "description": "Type 1 Errors", "slug": "type-1-errors"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing/z-statistics-vs-t-statistics/", "id": "5ABpqVSx33I", "title": "Z-statistics vs. T-statistics", "kind": "Video", "description": "Z-statistics vs. T-statistics", "slug": "z-statistics-vs-t-statistics"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing/small-sample-hypothesis-test/", "id": "D2sMsmL0ScQ", "title": "Small sample hypothesis test", "kind": "Video", "description": "Small Sample Hypothesis Test", "slug": "small-sample-hypothesis-test"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing/t-statistic-confidence-interval/", "id": "hV4pdjHCKuA", "title": "T-statistic confidence interval", "kind": "Video", "description": "T-Statistic Confidence Interval (for small sample sizes)", "slug": "t-statistic-confidence-interval"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing/large-sample-proportion-hypothesis-testing/", "id": "1JT9oODsClE", "title": "Large sample proportion hypothesis testing", "kind": "Video", "description": "Large Sample Proportion Hypothesis Testing", "slug": "large-sample-proportion-hypothesis-testing"}], "in_knowledge_map": false, "description": "This tutorial helps us answer one of the most important questions not only in statistics, but all of science: how confident are we that a result from a new drug or process is not due to random chance but due to an actual impact.\n\nIf you are familiar with sampling distributions and confidence intervals, you're ready for this adventure!", "node_slug": "hypothesis-testing", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistics-inferential/hypothesis-testing", "extended_slug": "math/probability/statistics-inferential/hypothesis-testing", "kind": "Topic", "slug": "hypothesis-testing"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/", "id": "hypothesis-testing-two-samples", "hide": false, "title": "Hypothesis testing with two samples", "child_data": [{"kind": "Video", "id": "6022811"}, {"kind": "Video", "id": "6022812"}, {"kind": "Video", "id": "6022813"}, {"kind": "Video", "id": "6022814"}, {"kind": "Video", "id": "6022815"}, {"kind": "Video", "id": "6022816"}, {"kind": "Video", "id": "6022817"}, {"kind": "Video", "id": "6022840"}], "children": [{"path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/variance-of-differences-of-random-variables/", "id": "rLdoKZ7w0xI", "title": "Variance of differences of random variables", "kind": "Video", "description": "Variance of Differences of Random Variables", "slug": "variance-of-differences-of-random-variables"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/difference-of-sample-means-distribution/", "id": "TcIDXqmt74A", "title": "Difference of sample means distribution", "kind": "Video", "description": "Difference of Sample Means Distribution", "slug": "difference-of-sample-means-distribution"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/confidence-interval-of-difference-of-means/", "id": "hxZ6uooEJOk", "title": "Confidence interval of difference of means", "kind": "Video", "description": "Confidence Interval of Difference of Means", "slug": "confidence-interval-of-difference-of-means"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/clarification-of-confidence-interval-of-difference-of-means/", "id": "yQsCMnz9wO8", "title": "Clarification of confidence interval of difference of means", "kind": "Video", "description": "Clarification of Confidence Interval of Difference of Means", "slug": "clarification-of-confidence-interval-of-difference-of-means"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/hypothesis-test-for-difference-of-means/", "id": "N984XGLjQfs", "title": "Hypothesis test for difference of means", "kind": "Video", "description": "Hypothesis Test for Difference of Means", "slug": "hypothesis-test-for-difference-of-means"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/comparing-population-proportions-1/", "id": "a1Ye5RcWOqg", "title": "Comparing population proportions 1", "kind": "Video", "description": "Comparing Population Proportions 1", "slug": "comparing-population-proportions-1"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/comparing-population-proportions-2/", "id": "MNbat1lrJW4", "title": "Comparing population proportions 2", "kind": "Video", "description": "Comparing Population Proportions 2", "slug": "comparing-population-proportions-2"}, {"path": "khan/math/probability/statistics-inferential/hypothesis-testing-two-samples/hypothesis-test-comparing-population-proportions/", "id": "dvSa_tx04hw", "title": "Hypothesis test comparing population proportions", "kind": "Video", "description": "Hypothesis Test Comparing Population Proportions", "slug": "hypothesis-test-comparing-population-proportions"}], "in_knowledge_map": false, "description": "You're already familiar with hypothesis testing with one sample. In this tutorial, we'll go further by testing whether the difference between the means of two samples seems to be unlikely purely due to chance.", "node_slug": "hypothesis-testing-two-samples", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistics-inferential/hypothesis-testing-two-samples", "extended_slug": "math/probability/statistics-inferential/hypothesis-testing-two-samples", "kind": "Topic", "slug": "hypothesis-testing-two-samples"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/probability/statistics-inferential/chi-square/", "id": "chi-square", "hide": false, "title": "Chi-square probability distribution", "child_data": [{"kind": "Video", "id": "8187302"}, {"kind": "Video", "id": "8187303"}, {"kind": "Video", "id": "8187304"}], "children": [{"path": "khan/math/probability/statistics-inferential/chi-square/chi-square-distribution-introduction/", "id": "dXB3cUGnaxQ", "title": "Chi-square distribution introduction", "kind": "Video", "description": "Chi-Square Distribution Introduction", "slug": "chi-square-distribution-introduction"}, {"path": "khan/math/probability/statistics-inferential/chi-square/pearson-s-chi-square-test-goodness-of-fit/", "id": "2QeDRsxSF9M", "title": "Pearson's chi square test (goodness of fit)", "kind": "Video", "description": "Pearson's Chi Square Test (Goodness of Fit)", "slug": "pearson-s-chi-square-test-goodness-of-fit"}, {"path": "khan/math/probability/statistics-inferential/chi-square/contingency-table-chi-square-test/", "id": "hpWdDmgsIRE", "title": "Contingency table chi-square test", "kind": "Video", "description": "Contingency Table Chi-Square Test", "slug": "contingency-table-chi-square-test"}], "in_knowledge_map": false, "description": "You've gotten good at hypothesis testing when you can make assumptions about the underlying distributions. In this tutorial, we'll learn about a new distribution (the chi-square one) and how it can help you (yes, you) infer what an underlying distribution even is!", "node_slug": "chi-square", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistics-inferential/chi-square", "extended_slug": "math/probability/statistics-inferential/chi-square", "kind": "Topic", "slug": "chi-square"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/probability/statistics-inferential/anova/", "id": "anova", "hide": false, "title": "Analysis of variance", "child_data": [{"kind": "Video", "id": "8187305"}, {"kind": "Video", "id": "8187306"}, {"kind": "Video", "id": "8187307"}], "children": [{"path": "khan/math/probability/statistics-inferential/anova/anova-1-calculating-sst-total-sum-of-squares/", "id": "EFdlFoHI_0I", "title": "ANOVA 1: Calculating SST (total sum of squares)", "kind": "Video", "description": "Analysis of Variance 1 - Calculating SST (Total Sum of Squares)", "slug": "anova-1-calculating-sst-total-sum-of-squares"}, {"path": "khan/math/probability/statistics-inferential/anova/anova-2-calculating-ssw-and-ssb-total-sum-of-squares-within-and-between-avi/", "id": "j9ZPMlVHJVs", "title": "ANOVA 2: Calculating SSW and SSB (total sum of squares within and between)", "kind": "Video", "description": "Analysis of Variance 2 - Calculating SSW and SSB (Total Sum of Squares Within and Between).avi", "slug": "anova-2-calculating-ssw-and-ssb-total-sum-of-squares-within-and-between-avi"}, {"path": "khan/math/probability/statistics-inferential/anova/anova-3-hypothesis-test-with-f-statistic/", "id": "Xg8_iSkJpAE", "title": "ANOVA 3: Hypothesis test with F-statistic", "kind": "Video", "description": "Analysis of Variance 3 -Hypothesis Test with F-Statistic", "slug": "anova-3-hypothesis-test-with-f-statistic"}], "in_knowledge_map": false, "description": "You already know a good bit about hypothesis testing with one or two samples. Now we take things further by making inferences based on three or more samples. We'll use the very special F-distribution to do it (F stands for \"fabulous\").", "node_slug": "anova", "render_type": "Tutorial", "topic_page_url": "/math/probability/statistics-inferential/anova", "extended_slug": "math/probability/statistics-inferential/anova", "kind": "Topic", "slug": "anova"}], "in_knowledge_map": true, "description": "Making inferences based on sample data. Confidence intervals. Margin of error. Hypothesis testing.", "node_slug": "statistics-inferential", "render_type": "Topic", "topic_page_url": "/math/probability/statistics-inferential", "extended_slug": "math/probability/statistics-inferential", "kind": "Topic", "slug": "statistics-inferential"}, {"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/math/probability/prob-and-stats-miscellaneous/", "id": "prob-and-stats-miscellaneous", "hide": false, "title": "Miscellaneous", "child_data": [{"kind": "Topic", "id": "xfe43e290"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/math/probability/prob-and-stats-miscellaneous/prob-stats-readiness-warmup/", "id": "prob-stats-readiness-warmup", "hide": false, "title": "Probability and statistics readiness warmup", "child_data": [{"kind": "Exercise", "id": "x9757a3bd"}], "children": [{"path": "khan/math/probability/prob-and-stats-miscellaneous/prob-stats-readiness-warmup/probability-and-statistics-warmup/", "id": "probability-and-statistics-warmup", "title": "Probability and statistics warmup", "description": "Are you ready to tackle probability and statistics? Check your understanding of foundational skills with this short quiz.", "slug": "probability-and-statistics-warmup", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "prob-stats-readiness-warmup", "render_type": "Tutorial", "topic_page_url": "/math/probability/prob-and-stats-miscellaneous/prob-stats-readiness-warmup", "extended_slug": "math/probability/prob-and-stats-miscellaneous/prob-stats-readiness-warmup", "kind": "Topic", "slug": "prob-stats-readiness-warmup"}], "in_knowledge_map": false, "description": "", "node_slug": "prob-and-stats-miscellaneous", "render_type": "Topic", "topic_page_url": "/math/probability/prob-and-stats-miscellaneous", "extended_slug": "math/probability/prob-and-stats-miscellaneous", "kind": "Topic", "slug": "prob-and-stats-miscellaneous"}], "in_knowledge_map": false, "description": "We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you're going to be challenged AND love it!", "node_slug": "probability", "render_type": "Subject", "topic_page_url": "/math/probability", "extended_slug": "math/probability", "kind": "Topic", "slug": "probability"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/precalculus/", "id": "precalculus", "hide": false, "title": "Precalculus", "child_data": [{"kind": "Topic", "id": "x8dd62d07"}, {"kind": "Topic", "id": "x6db71967"}, {"kind": "Topic", "id": "x2f0599c0"}, {"kind": "Topic", "id": "x1dd60c20"}, {"kind": "Topic", "id": "x1af1e2a6"}, {"kind": "Topic", "id": "xef1dc391"}, {"kind": "Topic", "id": "x3f5028ed"}, {"kind": "Topic", "id": "x16d5efc0"}, {"kind": "Topic", "id": "xccdba2de"}, {"kind": "Topic", "id": "x73a93038"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/precalculus/vectors-precalc/", "id": "vectors-precalc", "hide": false, "title": "Vectors", "child_data": [{"kind": "Topic", "id": "xadfd6867"}, {"kind": "Topic", "id": "xa04927ad"}, {"kind": "Topic", "id": "x2064b3d8"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/vectors-precalc/vector-basic/", "id": "vector-basic", "hide": false, "title": "Vector basics", "child_data": [{"kind": "Video", "id": "x88dbd3d7"}, {"kind": "Video", "id": "xb61c5618"}, {"kind": "Exercise", "id": "x3555924d"}, {"kind": "Video", "id": "xf85df5ef"}, {"kind": "Exercise", "id": "75894985"}, {"kind": "Video", "id": "x747f8c66"}, {"kind": "Video", "id": "x12b923fb"}, {"kind": "Exercise", "id": "x768b867c"}], "children": [{"path": "khan/math/precalculus/vectors-precalc/vector-basic/vector-representations-example/", "id": "n8Ic2Oj-zvA", "title": "Vector representations exercise example", "kind": "Video", "slug": "vector-representations-example"}, {"path": "khan/math/precalculus/vectors-precalc/vector-basic/classifying-vectors-and-quantities-example/", "id": "Yp0EhcVBxNU", "title": "Classifying vectors and quantities example", "kind": "Video", "slug": "classifying-vectors-and-quantities-example"}, {"path": "khan/math/precalculus/vectors-precalc/vector-basic/recognizing-vector-quantities/", "id": "recognizing-vector-quantities", "title": "Recognizing vector quantities", "slug": "recognizing-vector-quantities", "kind": "Exercise"}, {"path": "khan/math/precalculus/vectors-precalc/vector-basic/multiplying-vector-by-scalar/", "id": "ZN7YaSbY3-w", "title": "Multiplying a vector by a scalar", "kind": "Video", "slug": "multiplying-vector-by-scalar"}, {"path": "khan/math/precalculus/vectors-precalc/vector-basic/scaling_vectors/", "id": "scaling_vectors", "title": "Scaling vectors", "slug": "scaling_vectors", "kind": "Exercise"}, {"path": "khan/math/precalculus/vectors-precalc/vector-basic/visualizing-vector-addition-examples/", "id": "Khzs4k2a-mw", "title": "Visualizing vector addition examples", "kind": "Video", "slug": "visualizing-vector-addition-examples"}, {"path": "khan/math/precalculus/vectors-precalc/vector-basic/subtracting-vectors-exercise-example/", "id": "coDfeoi2zcQ", "title": "Subtracting vectors exercise example", "kind": "Video", "slug": "subtracting-vectors-exercise-example"}, {"path": "khan/math/precalculus/vectors-precalc/vector-basic/graphically-adding-and-subtracting-vectors/", "id": "graphically-adding-and-subtracting-vectors", "title": "Graphically adding and subtracting vectors", "slug": "graphically-adding-and-subtracting-vectors", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "vector-basic", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/vectors-precalc/vector-basic", "extended_slug": "math/precalculus/vectors-precalc/vector-basic", "kind": "Topic", "slug": "vector-basic"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/vectors-precalc/rect-form/", "id": "rect-form", "hide": false, "title": "Vectors in rectangular form", "child_data": [{"kind": "Video", "id": "x6bc2f1ae"}, {"kind": "Video", "id": "xad013660"}, {"kind": "Video", "id": "x3f79555c"}, {"kind": "Exercise", "id": "67078190"}, {"kind": "Video", "id": "x1d40e4d9"}, {"kind": "Video", "id": "xaa7d3e17"}, {"kind": "Exercise", "id": "x8869c9d2"}], "children": [{"path": "khan/math/precalculus/vectors-precalc/rect-form/adding-vectors/", "id": "8QihetGj3pg", "title": "Adding vectors", "kind": "Video", "slug": "adding-vectors"}, {"path": "khan/math/precalculus/vectors-precalc/rect-form/intro-unit-vector-notation/", "id": "9ylUcCOTH8Y", "title": "Unit vector notation", "kind": "Video", "slug": "intro-unit-vector-notation"}, {"path": "khan/math/precalculus/vectors-precalc/rect-form/adding-vectors-exercise-example/", "id": "-2HwisGonfc", "title": "Adding vectors exercise example", "kind": "Video", "slug": "adding-vectors-exercise-example"}, {"path": "khan/math/precalculus/vectors-precalc/rect-form/adding_vectors/", "id": "adding_vectors", "title": "Adding and subtracting vectors in rectangular form", "slug": "adding_vectors", "kind": "Exercise"}, {"path": "khan/math/precalculus/vectors-precalc/rect-form/vector-components-from-initial-and-terminal-points/", "id": "-0qEDcZZS9E", "title": "Vector components from initial and terminal points", "kind": "Video", "slug": "vector-components-from-initial-and-terminal-points"}, {"path": "khan/math/precalculus/vectors-precalc/rect-form/figuring-out-vector-initial-point/", "id": "AXG1OEbqV3Q", "title": "Figuring out vector initial point", "kind": "Video", "slug": "figuring-out-vector-initial-point"}, {"path": "khan/math/precalculus/vectors-precalc/rect-form/components_of_vectors/", "id": "components_of_vectors", "title": "Components of vectors", "slug": "components_of_vectors", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "rect-form", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/vectors-precalc/rect-form", "extended_slug": "math/precalculus/vectors-precalc/rect-form", "kind": "Topic", "slug": "rect-form"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/vectors-precalc/magnitude-direction/", "id": "magnitude-direction", "hide": false, "title": "Vectors in magnitude and direction form", "child_data": [{"kind": "Video", "id": "xb1784845"}, {"kind": "Video", "id": "x95ab94f3"}, {"kind": "Video", "id": "x0c800f6a"}, {"kind": "Exercise", "id": "x875a4b7a"}, {"kind": "Video", "id": "xb581cb7c"}, {"kind": "Video", "id": "x6d0446b8"}, {"kind": "Video", "id": "x5a2e610c"}, {"kind": "Exercise", "id": "x81c1307c"}, {"kind": "Video", "id": "x8e6a40ba"}, {"kind": "Video", "id": "xf3e77364"}, {"kind": "Video", "id": "xff91329c"}, {"kind": "Exercise", "id": "x1fbcf29d"}, {"kind": "Article", "id": "x3edd90ee"}], "children": [{"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/unit-vector-intro/", "id": "jCkhbKFZgLk", "title": "Unit vectors", "kind": "Video", "slug": "unit-vector-intro"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/scaling-unit-vector/", "id": "OFBI_rNDZE0", "title": "Scaling up a unit vector", "kind": "Video", "slug": "scaling-unit-vector"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/unit-vector-same-direction/", "id": "mzQQ9n-eoLs", "title": "Unit vector in same direction", "kind": "Video", "slug": "unit-vector-same-direction"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/unit-vector/", "id": "unit-vector", "title": "Unit vectors", "slug": "unit-vector", "kind": "Exercise"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/mag-dir-vec-sums/", "id": "6Kw2nIwWYL0", "title": "Breaking down vectors into components", "kind": "Video", "slug": "mag-dir-vec-sums"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/mag-dir-vec-sums-2/", "id": "SjY5UytlTTs", "title": "Magnitude and direction of vector sums", "kind": "Video", "slug": "mag-dir-vec-sums-2"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/mag-vec-sums/", "id": "0t8W4JFpP2M", "title": "Magnitude of vector sums", "kind": "Video", "slug": "mag-vec-sums"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/adding-vectors-in-magnitude-and-direction-form/", "id": "adding-vectors-in-magnitude-and-direction-form", "title": "Adding vectors in magnitude and direction form", "slug": "adding-vectors-in-magnitude-and-direction-form", "kind": "Exercise"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/adding-displacement-vectors/", "id": "cf1-CwrDwrA", "title": "Total displacement while hiking", "kind": "Video", "slug": "adding-displacement-vectors"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/adding-three-vectors/", "id": "KNklNvGof8o", "title": "Three way tug of war vectors", "kind": "Video", "slug": "adding-three-vectors"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/vector-component-in-direction/", "id": "9A8wM1UMLyo", "title": "Force contribution while pushing box", "kind": "Video", "slug": "vector-component-in-direction"}, {"path": "khan/math/precalculus/vectors-precalc/magnitude-direction/vector-word-problems/", "id": "vector-word-problems", "title": "Vector word problems", "slug": "vector-word-problems", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "magnitude-direction", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/vectors-precalc/magnitude-direction", "extended_slug": "math/precalculus/vectors-precalc/magnitude-direction", "kind": "Topic", "slug": "magnitude-direction"}], "in_knowledge_map": false, "description": "", "node_slug": "vectors-precalc", "render_type": "Topic", "topic_page_url": "/math/precalculus/vectors-precalc", "extended_slug": "math/precalculus/vectors-precalc", "kind": "Topic", "slug": "vectors-precalc"}, {"icon_src": "/images/power-mode/badges/algebra-matrices-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/precalculus/precalc-matrices/", "id": "precalc-matrices", "hide": false, "title": "Matrices", "child_data": [{"kind": "Topic", "id": "xa532c70e"}, {"kind": "Topic", "id": "x100f02b9"}, {"kind": "Topic", "id": "xa7900889"}, {"kind": "Topic", "id": "xa3054526"}, {"kind": "Topic", "id": "xfef41b4c"}, {"kind": "Topic", "id": "x151883e8"}, {"kind": "Topic", "id": "x48fb767a"}, {"kind": "Topic", "id": "xd93aed07"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/", "id": "Basic_matrix_operations", "hide": false, "title": "Basic matrix operations", "child_data": [{"kind": "Video", "id": "1400915680"}, {"kind": "Exercise", "id": "1106162193"}, {"kind": "Video", "id": "xf6a9994c"}, {"kind": "Exercise", "id": "x6d086361"}, {"kind": "Video", "id": "1400835599"}, {"kind": "Exercise", "id": "1105859514"}, {"kind": "Video", "id": "1401149467"}, {"kind": "Exercise", "id": "1106067541"}, {"kind": "Video", "id": "1401091052"}, {"kind": "Exercise", "id": "1283220979"}], "children": [{"path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/introduction-to-the-matrix/", "id": "0oGJTQCy4cQ", "title": "Introduction to the matrix", "kind": "Video", "slug": "introduction-to-the-matrix"}, {"path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/matrix_dimensions/", "id": "matrix_dimensions", "title": "Matrix dimensions", "description": "Identify the dimensions of a matrix", "slug": "matrix_dimensions", "kind": "Exercise"}, {"path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/data-in-matrices/", "id": "PPOIlLhsT6s", "title": "Representing data with matrices", "kind": "Video", "slug": "data-in-matrices"}, {"path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/representing-relationships-with-matrices/", "id": "representing-relationships-with-matrices", "title": "Representing relationships with matrices", "slug": "representing-relationships-with-matrices", "kind": "Exercise"}, {"path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/scalar-multiplication/", "id": "TbaltFbJ3wE", "title": "Scalar multiplication", "kind": "Video", "slug": "scalar-multiplication"}, {"path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/scalar_matrix_multiplication/", "id": "scalar_matrix_multiplication", "title": "Scalar matrix multiplication", "description": "Multiply a matrix by a scalar", "slug": "scalar_matrix_multiplication", "kind": "Exercise"}, {"path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/matrix-addition-and-subtraction-1/", "id": "WR9qCSXJlyY", "title": "Matrix addition and subtraction", "kind": "Video", "slug": "matrix-addition-and-subtraction-1"}, {"path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/matrix_addition_and_subtraction/", "id": "matrix_addition_and_subtraction", "title": "Matrix addition and subtraction", "description": "Add and subtract matrices", "slug": "matrix_addition_and_subtraction", "kind": "Exercise"}, {"path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/transpose-of-a-matrix/", "id": "TZrKrNVhbjI", "title": "Transpose of a matrix", "kind": "Video", "slug": "transpose-of-a-matrix"}, {"path": "khan/math/precalculus/precalc-matrices/basic_matrix_operations/matrix_transpose/", "id": "matrix_transpose", "title": "Matrix transpose", "description": "Transpose a matrix", "slug": "matrix_transpose", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Keanu Reeves' virtual world in the The Matrix (I guess we can call all three movies \"The Matrices\") have more in common with this tutorial than you might suspect. Matrices are ways of organizing numbers. They are used extensively in computer graphics, simulations and information processing in general. The super-intelligent artificial intelligences that created The Matrix for Keanu must have used many matrices in the process.\n\nThis tutorial introduces you to what a matrix is and how we define some basic operations on them.", "node_slug": "Basic_matrix_operations", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/precalc-matrices/Basic_matrix_operations", "extended_slug": "math/precalculus/precalc-matrices/Basic_matrix_operations", "kind": "Topic", "slug": "basic_matrix_operations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/precalc-matrices/matrix_multiplication/", "id": "matrix_multiplication", "hide": false, "title": "Matrix multiplication", "child_data": [{"kind": "Video", "id": "xe9bce422"}, {"kind": "Video", "id": "x07e01747"}, {"kind": "Exercise", "id": "1106173190"}, {"kind": "Video", "id": "xbb8bac0f"}, {"kind": "Exercise", "id": "1105993679"}, {"kind": "Video", "id": "x044ecd2f"}, {"kind": "Exercise", "id": "1106113431"}], "children": [{"path": "khan/math/precalculus/precalc-matrices/matrix_multiplication/matrix-multiplication-intro/", "id": "kT4Mp9EdVqs", "title": "Matrix multiplication introduction", "kind": "Video", "slug": "matrix-multiplication-intro"}, {"path": "khan/math/precalculus/precalc-matrices/matrix_multiplication/multiplying-a-matrix-by-a-matrix/", "id": "OMA2Mwo0aZg", "title": "Multiplying a matrix by a matrix", "kind": "Video", "slug": "multiplying-a-matrix-by-a-matrix"}, {"path": "khan/math/precalculus/precalc-matrices/matrix_multiplication/multiplying_a_matrix_by_a_matrix/", "id": "multiplying_a_matrix_by_a_matrix", "title": "Multiplying a matrix by a matrix", "description": "Multiply two matrices", "slug": "multiplying_a_matrix_by_a_matrix", "kind": "Exercise"}, {"path": "khan/math/precalculus/precalc-matrices/matrix_multiplication/multiplying-a-matrix-by-a-column-vector/", "id": "Awcj447pYuk", "title": "Multiplying a matrix by a column vector", "kind": "Video", "slug": "multiplying-a-matrix-by-a-column-vector"}, {"path": "khan/math/precalculus/precalc-matrices/matrix_multiplication/multiplying_a_matrix_by_a_vector/", "id": "multiplying_a_matrix_by_a_vector", "title": "Multiplying a matrix by a vector", "description": "Multiply a matrix by a vector", "slug": "multiplying_a_matrix_by_a_vector", "kind": "Exercise"}, {"path": "khan/math/precalculus/precalc-matrices/matrix_multiplication/defined-and-undefined-matrix-operations/", "id": "O1-9f1g0OsI", "title": "Defined and undefined matrix operations", "kind": "Video", "slug": "defined-and-undefined-matrix-operations"}, {"path": "khan/math/precalculus/precalc-matrices/matrix_multiplication/defined_and_undefined_matrix_operations/", "id": "defined_and_undefined_matrix_operations", "title": "Defined and undefined matrix operations", "description": "Determine whether the addition, subtraction, or multiplication of two matrices is defined", "slug": "defined_and_undefined_matrix_operations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You know what a matrix is, how to add them and multiply them by a scalar. Now we'll define multiplying one matrix by another matrix. The process may seem bizarre at first (and maybe even a little longer than that), but there is a certain naturalness to the process. When you study more advanced linear algebra and computer science, it has tons of applications (computer graphics, simulations, etc.)", "node_slug": "matrix_multiplication", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/precalc-matrices/matrix_multiplication", "extended_slug": "math/precalculus/precalc-matrices/matrix_multiplication", "kind": "Topic", "slug": "matrix_multiplication"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/precalc-matrices/properties-matrix-multiplication/", "id": "properties-matrix-multiplication", "hide": false, "title": "Properties of matrix multiplication", "child_data": [{"kind": "Video", "id": "xe5c8c1bb"}, {"kind": "Video", "id": "xa56c25c1"}, {"kind": "Video", "id": "x6ed8fca0"}, {"kind": "Exercise", "id": "xc83f7fcf"}], "children": [{"path": "khan/math/precalculus/precalc-matrices/properties-matrix-multiplication/commutative-property-matrix-multiplication/", "id": "z-SU7P-gIoQ", "title": "Is matrix multiplication commutative", "kind": "Video", "slug": "commutative-property-matrix-multiplication"}, {"path": "khan/math/precalculus/precalc-matrices/properties-matrix-multiplication/associative-property-matrix-multiplication/", "id": "8Ryfe82DTcM", "title": "Associative property of matrix multiplication", "kind": "Video", "slug": "associative-property-matrix-multiplication"}, {"path": "khan/math/precalculus/precalc-matrices/properties-matrix-multiplication/matrix-expressions/", "id": "OjF765iVuF8", "title": "Equivalent matrix expressions", "kind": "Video", "slug": "matrix-expressions"}, {"path": "khan/math/precalculus/precalc-matrices/properties-matrix-multiplication/properties-of-matrix-multiplication/", "id": "properties-of-matrix-multiplication", "title": "Properties of matrix multiplication", "slug": "properties-of-matrix-multiplication", "kind": "Exercise"}], "in_knowledge_map": false, "description": "As we'll see, some of the properties of scalar multiplication (like the distributive and associative properties) have analogs in matrix multiplication while some don't (the commutative property).", "node_slug": "properties-matrix-multiplication", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/precalc-matrices/properties-matrix-multiplication", "extended_slug": "math/precalculus/precalc-matrices/properties-matrix-multiplication", "kind": "Topic", "slug": "properties-matrix-multiplication"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/precalc-matrices/zero-identity-matrix-tutorial/", "id": "zero-identity-matrix-tutorial", "hide": false, "title": "Zero and identity matrices", "child_data": [{"kind": "Video", "id": "x45df6c9a"}, {"kind": "Video", "id": "xcb707bb1"}, {"kind": "Video", "id": "x04b88473"}, {"kind": "Video", "id": "x620f2504"}, {"kind": "Exercise", "id": "x1e3a9547"}], "children": [{"path": "khan/math/precalculus/precalc-matrices/zero-identity-matrix-tutorial/identity-matrix/", "id": "3cnIa0fYJkY", "title": "Identity matrix", "kind": "Video", "slug": "identity-matrix"}, {"path": "khan/math/precalculus/precalc-matrices/zero-identity-matrix-tutorial/identity-matrix-dimensions/", "id": "l7p1X5pdDoc", "title": "Dimensions of identity matrix", "kind": "Video", "slug": "identity-matrix-dimensions"}, {"path": "khan/math/precalculus/precalc-matrices/zero-identity-matrix-tutorial/zero-matrix/", "id": "LOf8bfjiLow", "title": "Zero matrix", "kind": "Video", "slug": "zero-matrix"}, {"path": "khan/math/precalculus/precalc-matrices/zero-identity-matrix-tutorial/identity-zero-matrix-equation/", "id": "ikadoCpDNT8", "title": "Identity and zero matrix equation", "kind": "Video", "slug": "identity-zero-matrix-equation"}, {"path": "khan/math/precalculus/precalc-matrices/zero-identity-matrix-tutorial/zero-and-identity-matrices/", "id": "zero-and-identity-matrices", "title": "Zero and identity matrices", "slug": "zero-and-identity-matrices", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In arithmetic, we learned than a number times 1 is still that number and that anything times 0 is 0. In this tutorial, we attempt to extend these ideas to the world of matrices!", "node_slug": "zero-identity-matrix-tutorial", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/precalc-matrices/zero-identity-matrix-tutorial", "extended_slug": "math/precalculus/precalc-matrices/zero-identity-matrix-tutorial", "kind": "Topic", "slug": "zero-identity-matrix-tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/precalc-matrices/transformation-matrix/", "id": "transformation-matrix", "hide": false, "title": "Geometric transformations with matrices", "child_data": [{"kind": "Video", "id": "x181bbe4e"}, {"kind": "Video", "id": "xe4b9c0d5"}, {"kind": "Video", "id": "x723c8dfd"}, {"kind": "Exercise", "id": "xb4f3994f"}], "children": [{"path": "khan/math/precalculus/precalc-matrices/transformation-matrix/transforming-position-vector/", "id": "Kh8HKAxdEyw", "title": "Transformation matrix for position vector", "kind": "Video", "slug": "transforming-position-vector"}, {"path": "khan/math/precalculus/precalc-matrices/transformation-matrix/matrix-transformation-triangle/", "id": "RKBSX-6pKgY", "title": "Matrix transformation on triangle", "kind": "Video", "slug": "matrix-transformation-triangle"}, {"path": "khan/math/precalculus/precalc-matrices/transformation-matrix/matrix-transformation-quadrilateral/", "id": "3tyM_M3FQNM", "title": "Transforming a quadrilateral", "kind": "Video", "slug": "matrix-transformation-quadrilateral"}, {"path": "khan/math/precalculus/precalc-matrices/transformation-matrix/transformation-matrices-1/", "id": "transformation-matrices-1", "title": "Geometric transformations with matrix multiplication", "slug": "transformation-matrices-1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We'll now see one of the most powerful applications of matrix multiplication--geometric transformations. This is core of what videos games and computer-based animation uses to \"transform\" figures based on movement or perspective. You probably never thought matrices could be so much fun!", "node_slug": "transformation-matrix", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/precalc-matrices/transformation-matrix", "extended_slug": "math/precalculus/precalc-matrices/transformation-matrix", "kind": "Topic", "slug": "transformation-matrix"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/precalc-matrices/inverting_matrices/", "id": "inverting_matrices", "hide": false, "title": "Inverting matrices", "child_data": [{"kind": "Video", "id": "1128184016"}, {"kind": "Exercise", "id": "1197684422"}, {"kind": "Video", "id": "1128298896"}, {"kind": "Video", "id": "25203"}, {"kind": "Exercise", "id": "1283269432"}, {"kind": "Video", "id": "25209"}, {"kind": "Video", "id": "25211"}, {"kind": "Video", "id": "1128416416"}, {"kind": "Video", "id": "1128472045"}, {"kind": "Exercise", "id": "1373894443"}, {"kind": "Video", "id": "1128367509"}, {"kind": "Video", "id": "1128279750"}, {"kind": "Video", "id": "25205"}, {"kind": "Video", "id": "25207"}, {"kind": "Video", "id": "25213"}, {"kind": "Exercise", "id": "1283137991"}], "children": [{"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/finding-the-determinant-of-a-2x2-matrix/", "id": "OU9sWHk_dlw", "title": "Finding the determinant of a 2x2 matrix", "kind": "Video", "description": "Hint for finding the determinant of a 2x2 matrix", "slug": "finding-the-determinant-of-a-2x2-matrix"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/matrix_determinant/", "id": "matrix_determinant", "title": "Determinant of a 2x2 matrix", "description": "Find the determinant of a 2x2 matrix", "slug": "matrix_determinant", "kind": "Exercise"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverse-of-a-2x2-matrix/", "id": "01c12NaUQDw", "title": "Inverse of a 2x2 matrix", "kind": "Video", "description": "Example of calculating the inverse of a 2x2 matrix", "slug": "inverse-of-a-2x2-matrix"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverse-matrix-part-1/", "id": "iUQR0enP7RQ", "title": "Idea behind inverting a 2x2 matrix", "kind": "Video", "description": "What the inverse of a matrix is. Examples of inverting a 2x2 matrix.", "slug": "inverse-matrix-part-1"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/matrix_inverse_2x2/", "id": "matrix_inverse_2x2", "title": "Inverse of a 2x2 matrix", "description": "Find the inverse of a 2x2 matrix", "slug": "matrix_inverse_2x2", "kind": "Exercise"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/matrices-to-solve-a-system-of-equations/", "id": "AUqeb9Z3y3k", "title": "Matrices to solve a system of equations", "kind": "Video", "description": "Using the inverse of a matrix to solve a system of equations.", "slug": "matrices-to-solve-a-system-of-equations"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/matrices-to-solve-a-vector-combination-problem/", "id": "gsNgdVdAT1o", "title": "Matrices to solve a vector combination problem", "kind": "Video", "description": "Using matrices to figure out if some combination of 2 vectors can create a 3rd vector", "slug": "matrices-to-solve-a-vector-combination-problem"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/finding-the-determinant-of-a-3x3-matrix-method-1/", "id": "v4MenooI1J0", "title": "Finding the determinant of a 3x3 matrix method 1", "kind": "Video", "slug": "finding-the-determinant-of-a-3x3-matrix-method-1"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/finding-the-determinant-of-a-3x3-matrix-method-2/", "id": "u00I3MCrspU", "title": "Finding the determinant of a 3x3 matrix method 2", "kind": "Video", "slug": "finding-the-determinant-of-a-3x3-matrix-method-2"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/matrix_determinant_3x3/", "id": "matrix_determinant_3x3", "title": "Determinant of a 3x3 matrix", "description": "Find the determinant of a 3x3 matrix", "slug": "matrix_determinant_3x3", "kind": "Exercise"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverting-3x3-part-1-calculating-matrix-of-minors-and-cofactor-matrix/", "id": "xZBbfLLfVV4", "title": "Inverting 3x3 part 1: Calculating matrix of minors and cofactor matrix", "kind": "Video", "description": "Beginning our quest to invert a 3x3 matrix. We calculate the matrix of minors and the cofactor matrix.", "slug": "inverting-3x3-part-1-calculating-matrix-of-minors-and-cofactor-matrix"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverting-3x3-part-2-determinant-and-adjugate-of-a-matrix/", "id": "ArcrdMkEmKo", "title": "Inverting 3x3 part 2: Determinant and adjugate of a matrix", "kind": "Video", "description": "Finishing up our 3x3 matrix inversion", "slug": "inverting-3x3-part-2-determinant-and-adjugate-of-a-matrix"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverting-matrices-part-2/", "id": "S4n-tQZnU6o", "title": "Classic video on inverting a 3x3 matrix part 1", "kind": "Video", "description": "Inverting a 3x3 matrix", "slug": "inverting-matrices-part-2"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/inverting-matrices-part-3/", "id": "obts_JDS6_Q", "title": "Classic video on inverting a 3x3 matrix part 2", "kind": "Video", "description": "Using Gauss-Jordan elimination to invert a 3x3 matrix.", "slug": "inverting-matrices-part-3"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/singular-matrices/", "id": "UqyN7-tRS00", "title": "Singular matrices", "kind": "Video", "description": "When and why you can't invert a matrix.", "slug": "singular-matrices"}, {"path": "khan/math/precalculus/precalc-matrices/inverting_matrices/matrix_inverse_3x3/", "id": "matrix_inverse_3x3", "title": "Inverse of a 3x3 matrix", "description": "Find the inverse of a 3x3 matrix", "slug": "matrix_inverse_3x3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Multiplying by the inverse of a matrix is the closest thing we have to matrix division. Like multiplying a regular number by its reciprocal to get 1, multiplying a matrix by its inverse gives us the identity matrix (1 could be thought of as the \"identity scalar\").\n\nThis tutorial will walk you through this sometimes involved process which will become bizarrely fun once you get the hang of it.", "node_slug": "inverting_matrices", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/precalc-matrices/inverting_matrices", "extended_slug": "math/precalculus/precalc-matrices/inverting_matrices", "kind": "Topic", "slug": "inverting_matrices"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/precalc-matrices/matrix-equations/", "id": "matrix-equations", "hide": false, "title": "Matrix equations", "child_data": [{"kind": "Video", "id": "x41cbb463"}, {"kind": "Video", "id": "x516a2c36"}, {"kind": "Exercise", "id": "x06699ab3"}, {"kind": "Exercise", "id": "x9adc5036"}], "children": [{"path": "khan/math/precalculus/precalc-matrices/matrix-equations/matrix-equations-systems/", "id": "EC2mgUZyzoA", "title": "Matrix equations and systems", "kind": "Video", "slug": "matrix-equations-systems"}, {"path": "khan/math/precalculus/precalc-matrices/matrix-equations/solving-matrix-equation/", "id": "0_DYEFtlCiM", "title": "Solving the matrix vector equation", "kind": "Video", "slug": "solving-matrix-equation"}, {"path": "khan/math/precalculus/precalc-matrices/matrix-equations/writing-systems-of-equations-as-matrix-equations/", "id": "writing-systems-of-equations-as-matrix-equations", "title": "Writing systems of equations as matrix equations", "slug": "writing-systems-of-equations-as-matrix-equations", "kind": "Exercise"}, {"path": "khan/math/precalculus/precalc-matrices/matrix-equations/solving-matrix-equations/", "id": "solving-matrix-equations", "title": "Solving matrix equations", "slug": "solving-matrix-equations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "matrix-equations", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/precalc-matrices/matrix-equations", "extended_slug": "math/precalculus/precalc-matrices/matrix-equations", "kind": "Topic", "slug": "matrix-equations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/precalculus/precalc-matrices/reduced_row_echelon/", "id": "reduced_row_echelon", "hide": false, "title": "Reduced row echelon form", "child_data": [{"kind": "Video", "id": "25255"}, {"kind": "Video", "id": "25257"}, {"kind": "Video", "id": "25259"}], "children": [{"path": "khan/math/precalculus/precalc-matrices/reduced_row_echelon/matrices-reduced-row-echelon-form-1/", "id": "L0CmbneYETs", "title": "Matrices: Reduced row echelon form 1", "kind": "Video", "description": "Solving a system of linear equations by putting an augmented matrix into reduced row echelon form", "slug": "matrices-reduced-row-echelon-form-1"}, {"path": "khan/math/precalculus/precalc-matrices/reduced_row_echelon/matrices-reduced-row-echelon-form-2/", "id": "lP1DGtZ8Wys", "title": "Matrices: Reduced row echelon form 2", "kind": "Video", "description": "Another example of solving a system of linear equations by putting an augmented matrix into reduced row echelon form", "slug": "matrices-reduced-row-echelon-form-2"}, {"path": "khan/math/precalculus/precalc-matrices/reduced_row_echelon/matrices-reduced-row-echelon-form-3/", "id": "JVDrlTdzxiI", "title": "Matrices: Reduced row echelon form 3", "kind": "Video", "description": "And another example of solving a system of linear equations by putting an augmented matrix into reduced row echelon form", "slug": "matrices-reduced-row-echelon-form-3"}], "in_knowledge_map": false, "description": "You've probably already appreciated that there are many ways to solve a system of equations. Well, we'll introduce you to another one in this tutorial. Reduced row echelon form has us performing operations on matrices to get them in a form that helps us solve the system.", "node_slug": "reduced_row_echelon", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/precalc-matrices/reduced_row_echelon", "extended_slug": "math/precalculus/precalc-matrices/reduced_row_echelon", "kind": "Topic", "slug": "reduced_row_echelon"}], "in_knowledge_map": true, "description": "Understanding and solving matrices.", "node_slug": "precalc-matrices", "render_type": "Topic", "topic_page_url": "/math/precalculus/precalc-matrices", "extended_slug": "math/precalculus/precalc-matrices", "kind": "Topic", "slug": "precalc-matrices"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/precalculus/parametric_equations/", "id": "parametric_equations", "hide": false, "title": "Parametric equations and polar coordinates", "child_data": [{"kind": "Topic", "id": "x7cd36062"}, {"kind": "Topic", "id": "x957b6743"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/precalculus/parametric_equations/parametric/", "id": "parametric", "hide": false, "title": "Parametric equations", "child_data": [{"kind": "Video", "id": "25825"}, {"kind": "Video", "id": "25827"}, {"kind": "Video", "id": "25829"}, {"kind": "Video", "id": "25831"}], "children": [{"path": "khan/math/precalculus/parametric_equations/parametric/parametric-equations-1/", "id": "m6c6dlmUT1c", "title": "Parametric equations 1", "kind": "Video", "description": "Introduction to parametric equations", "slug": "parametric-equations-1"}, {"path": "khan/math/precalculus/parametric_equations/parametric/parametric-equations-2/", "id": "wToSIQJ2o_8", "title": "Parametric equations 2", "kind": "Video", "description": "Eliminating the parameter", "slug": "parametric-equations-2"}, {"path": "khan/math/precalculus/parametric_equations/parametric/parametric-equations-3/", "id": "57BiI_iD3-U", "title": "Parametric equations 3", "kind": "Video", "description": "Removing the parameter from a more interesting example", "slug": "parametric-equations-3"}, {"path": "khan/math/precalculus/parametric_equations/parametric/parametric-equations-4/", "id": "IReD6c_njOY", "title": "Parametric equations 4", "kind": "Video", "description": "Parametric Equations that \"move\" along the same path", "slug": "parametric-equations-4"}], "in_knowledge_map": false, "description": "Here we will explore representing our x's and y's in terms of a third variable or parameter (often 't'). Not only can we describe new things, but it can be super useful for describing things like particle motion in physics.", "node_slug": "parametric", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/parametric_equations/parametric", "extended_slug": "math/precalculus/parametric_equations/parametric", "kind": "Topic", "slug": "parametric"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/precalculus/parametric_equations/polar_coor/", "id": "polar_coor", "hide": false, "title": "Polar coordinates", "child_data": [{"kind": "Video", "id": "25819"}, {"kind": "Video", "id": "25821"}, {"kind": "Video", "id": "25823"}], "children": [{"path": "khan/math/precalculus/parametric_equations/polar_coor/polar-coordinates-1/", "id": "jexMSlSDubM", "title": "Polar coordinates 1", "kind": "Video", "description": "Introduction to polar coordinates", "slug": "polar-coordinates-1"}, {"path": "khan/math/precalculus/parametric_equations/polar_coor/polar-coordinates-2/", "id": "zGpbSGj_vfE", "title": "Polar coordinates 2", "kind": "Video", "description": "Conversion from Cartesian to Polar Coordinates", "slug": "polar-coordinates-2"}, {"path": "khan/math/precalculus/parametric_equations/polar_coor/polar-coordinates-3/", "id": "9iqN12hCn10", "title": "Polar coordinates 3", "kind": "Video", "description": "Converting between Cartesian and Polar functions", "slug": "polar-coordinates-3"}], "in_knowledge_map": false, "description": "Feel that Cartesian coordinates are too \"square\". That they bias us towards lines and away from cool spirally things. Well polar coordinates be just what you need!", "node_slug": "polar_coor", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/parametric_equations/polar_coor", "extended_slug": "math/precalculus/parametric_equations/polar_coor", "kind": "Topic", "slug": "polar_coor"}], "in_knowledge_map": false, "description": "An alternative to Cartesian coordinates.", "node_slug": "parametric_equations", "render_type": "Topic", "topic_page_url": "/math/precalculus/parametric_equations", "extended_slug": "math/precalculus/parametric_equations", "kind": "Topic", "slug": "parametric_equations"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/precalculus/imaginary_complex_precalc/", "id": "imaginary_complex_precalc", "hide": false, "title": "Imaginary and complex numbers", "child_data": [{"kind": "Topic", "id": "x3e480242"}, {"kind": "Topic", "id": "x7bc8cadd"}, {"kind": "Topic", "id": "x9a2c550d"}, {"kind": "Topic", "id": "x45d4a45d"}, {"kind": "Topic", "id": "xadd2ba7f"}, {"kind": "Topic", "id": "x62f80d4d"}, {"kind": "Topic", "id": "x75e0e0fa"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/imaginary_complex_precalc/i_precalc/", "id": "i_precalc", "hide": false, "title": "The imaginary unit i", "child_data": [{"kind": "Video", "id": "145918385"}, {"kind": "Video", "id": "145918384"}, {"kind": "Exercise", "id": "523254889"}, {"kind": "Video", "id": "150088079"}, {"kind": "Video", "id": "148079183"}], "children": [{"path": "khan/math/precalculus/imaginary_complex_precalc/i_precalc/introduction-to-i-and-imaginary-numbers/", "id": "ysVcAYo7UPI", "title": "Introduction to i and imaginary numbers", "kind": "Video", "description": "Introduction to i and imaginary numbers", "slug": "introduction-to-i-and-imaginary-numbers"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/i_precalc/calculating-i-raised-to-arbitrary-exponents/", "id": "QiwfF83NWNA", "title": "Calculating i raised to arbitrary exponents", "kind": "Video", "description": "Calculating i raised to arbitrarily high exponents", "slug": "calculating-i-raised-to-arbitrary-exponents"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/i_precalc/imaginary_unit_powers/", "id": "imaginary_unit_powers", "title": "Imaginary unit powers", "description": "Solve problems with base i (square root of -1) raised to a positive exponent", "slug": "imaginary_unit_powers", "kind": "Exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/i_precalc/imaginary-roots-of-negative-numbers/", "id": "s03qez-6JMA", "title": "Imaginary roots of negative numbers", "kind": "Video", "description": "Imaginary Roots of Negative Numbers", "slug": "imaginary-roots-of-negative-numbers"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/i_precalc/i-as-the-principal-root-of-1-a-little-technical/", "id": "rYG1D5lUE4I", "title": "i as the principal root of -1 (a little technical)", "kind": "Video", "description": "i as the principal square root of -1", "slug": "i-as-the-principal-root-of-1-a-little-technical"}], "in_knowledge_map": false, "description": "This is where math starts to get really cool. It may see strange to define a number whose square is negative one. Why do we do this? Because it fits a nice niche in the math ecosystem and can be used to solve problems in engineering and science (not to mention some of the coolest fractals are based on imaginary and complex numbers). The more you think about it, you might realize that all numbers, not just i, are very abstract.", "node_slug": "i_precalc", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/imaginary_complex_precalc/i_precalc", "extended_slug": "math/precalculus/imaginary_complex_precalc/i_precalc", "kind": "Topic", "slug": "i_precalc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/", "id": "complex_num_precalc", "hide": false, "title": "Complex number introduction", "child_data": [{"kind": "Video", "id": "xe9c076b5"}, {"kind": "Exercise", "id": "xdb649a85"}, {"kind": "Video", "id": "x21268ed3"}, {"kind": "Exercise", "id": "523235921"}, {"kind": "Video", "id": "xe7a630e5"}, {"kind": "Video", "id": "x1b075a9f"}, {"kind": "Exercise", "id": "523319125"}, {"kind": "Exercise", "id": "1383488718"}, {"kind": "Video", "id": "xd622f44d"}, {"kind": "Exercise", "id": "xc2cf2889"}], "children": [{"path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/complex-number-intro/", "id": "SP-YJe7Vldo", "title": "Introduction to complex numbers", "kind": "Video", "slug": "complex-number-intro"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/the-imaginary-unit-and-complex-numbers/", "id": "the-imaginary-unit-and-complex-numbers", "title": "The imaginary unit and complex numbers", "slug": "the-imaginary-unit-and-complex-numbers", "kind": "Exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/plotting-complex-numbers-on-the-complex-plane/", "id": "kGzXIbauGQk", "title": "Plotting complex numbers on the complex plane", "kind": "Video", "slug": "plotting-complex-numbers-on-the-complex-plane"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/the_complex_plane/", "id": "the_complex_plane", "title": "The complex plane", "description": "Plot complex numbers on the complex plane.", "slug": "the_complex_plane", "kind": "Exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/complex-number-addition/", "id": "0QlJrnRRfW8", "title": "Adding complex numbers and Argand Diagrams", "kind": "Video", "slug": "complex-number-addition"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/complex-number-subtraction/", "id": "-T0OKK-R3lA", "title": "Subtracting complex numbers", "kind": "Video", "slug": "complex-number-subtraction"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/adding_and_subtracting_complex_numbers/", "id": "adding_and_subtracting_complex_numbers", "title": "Adding and subtracting complex numbers", "slug": "adding_and_subtracting_complex_numbers", "kind": "Exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/complex_plane_operations/", "id": "complex_plane_operations", "title": "Complex plane operations", "description": "Add or subtract numbers in the complex plane.", "slug": "complex_plane_operations", "kind": "Exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/complex-plane-distance-midpoint/", "id": "Efoeqb6tC88", "title": "Midpoint and distance on complex plane", "kind": "Video", "slug": "complex-plane-distance-midpoint"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_num_precalc/distance-and-midpoint-on-the-complex-plane/", "id": "distance-and-midpoint-on-the-complex-plane", "title": "Distance and midpoint on the complex plane", "slug": "distance-and-midpoint-on-the-complex-plane", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's start constructing numbers that have both a real and imaginary part. We'll call them complex. We can even plot them on the complex plane and use them to find the roots of ANY quadratic equation. The fun must not stop!", "node_slug": "complex_num_precalc", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/imaginary_complex_precalc/complex_num_precalc", "extended_slug": "math/precalculus/imaginary_complex_precalc/complex_num_precalc", "kind": "Topic", "slug": "complex_num_precalc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/imaginary_complex_precalc/factoring-with-complex-numbers/", "id": "factoring-with-complex-numbers", "hide": false, "title": "Factoring using imaginary numbers", "child_data": [{"kind": "Video", "id": "xe59b0d49"}, {"kind": "Video", "id": "xbe367cd0"}, {"kind": "Exercise", "id": "xea1a0b37"}], "children": [{"path": "khan/math/precalculus/imaginary_complex_precalc/factoring-with-complex-numbers/factoring-sums-of-squares/", "id": "8TPofjGXDR4", "title": "Factoring sum of squares", "kind": "Video", "slug": "factoring-sums-of-squares"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/factoring-with-complex-numbers/factoring-sum-of-squares/", "id": "C3QPTCwpIZo", "title": "Example factoring sum of squares", "kind": "Video", "slug": "factoring-sum-of-squares"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/factoring-with-complex-numbers/equivalent-forms-of-expressions-with-complex-numbers/", "id": "equivalent-forms-of-expressions-with-complex-numbers", "title": "Equivalent forms of expressions with complex numbers", "slug": "equivalent-forms-of-expressions-with-complex-numbers", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "factoring-with-complex-numbers", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/imaginary_complex_precalc/factoring-with-complex-numbers", "extended_slug": "math/precalculus/imaginary_complex_precalc/factoring-with-complex-numbers", "kind": "Topic", "slug": "factoring-with-complex-numbers"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex/", "id": "multiplying-dividing-complex", "hide": false, "title": "Multiplying and dividing complex numbers", "child_data": [{"kind": "Video", "id": "150088076"}, {"kind": "Exercise", "id": "523337087"}, {"kind": "Video", "id": "8187550"}, {"kind": "Video", "id": "150088078"}, {"kind": "Video", "id": "150088083"}, {"kind": "Exercise", "id": "523311311"}], "children": [{"path": "khan/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex/multiplying-complex-numbers/", "id": "cWn6g8Qqvs4", "title": "Multiplying complex numbers", "kind": "Video", "description": "Multiplying Complex Numbers", "slug": "multiplying-complex-numbers"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex/multiplying_complex_numbers/", "id": "multiplying_complex_numbers", "title": "Multiplying complex numbers", "slug": "multiplying_complex_numbers", "kind": "Exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex/complex-conjugates/", "id": "BZxZ_eEuJBM", "title": "Complex conjugates", "kind": "Video", "description": "Complex Conjugates", "slug": "complex-conjugates"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex/complex-conjugates-example/", "id": "dbxJ6LD0344", "title": "Complex conjugates example", "kind": "Video", "description": "Complex Conjugates", "slug": "complex-conjugates-example"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex/dividing-complex-numbers/", "id": "Z8j5RDOibV4", "title": "Dividing complex numbers", "kind": "Video", "description": "Dividing Complex Numbers", "slug": "dividing-complex-numbers"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex/dividing_complex_numbers/", "id": "dividing_complex_numbers", "title": "Dividing complex numbers", "slug": "dividing_complex_numbers", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "multiplying-dividing-complex", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex", "extended_slug": "math/precalculus/imaginary_complex_precalc/multiplying-dividing-complex", "kind": "Topic", "slug": "multiplying-dividing-complex"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/imaginary_complex_precalc/complex_analysis/", "id": "complex_analysis", "hide": false, "title": "The complex plane", "child_data": [{"kind": "Video", "id": "8187548"}, {"kind": "Video", "id": "x49eee15a"}, {"kind": "Exercise", "id": "523341553"}, {"kind": "Video", "id": "x1c5a5296"}, {"kind": "Exercise", "id": "1440060790"}, {"kind": "Video", "id": "x5cb8c70a"}, {"kind": "Exercise", "id": "xbf1617a8"}], "children": [{"path": "khan/math/precalculus/imaginary_complex_precalc/complex_analysis/basic-complex-analysis/", "id": "FwuPXchH2rA", "title": "Basic complex analysis", "kind": "Video", "description": "Argand Diagram, magnitude, modulus, argument, exponential form", "slug": "basic-complex-analysis"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_analysis/absolute-value-of-a-complex-number/", "id": "yvzyC4VBpUU", "title": "Absolute value of a complex number", "kind": "Video", "slug": "absolute-value-of-a-complex-number"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_analysis/absolute_value_of_complex_numbers/", "id": "absolute_value_of_complex_numbers", "title": "Absolute value of complex numbers", "description": "Find the absolute value of a complex number.", "slug": "absolute_value_of_complex_numbers", "kind": "Exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_analysis/complex-number-polar-form-intuition-exercise/", "id": "YZRzt_AsuVs", "title": "Complex number polar form intuition exercise", "kind": "Video", "slug": "complex-number-polar-form-intuition-exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_analysis/complex_number_polar_form_intuition/", "id": "complex_number_polar_form_intuition", "title": "Complex number polar form intuition", "description": "Adjust the angle and radius to plot a complex number in polar form.", "slug": "complex_number_polar_form_intuition", "kind": "Exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_analysis/polar-form-complex-number/", "id": "8RasCV_Lggg", "title": "Rectangular to polar form of complex number", "kind": "Video", "slug": "polar-form-complex-number"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_analysis/rectangular-and-polar-forms-of-complex-numbers/", "id": "rectangular-and-polar-forms-of-complex-numbers", "title": "Rectangular and polar forms of complex numbers", "slug": "rectangular-and-polar-forms-of-complex-numbers", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You know what imaginary and complex numbers are, but want to start digging a bit deeper. In this tutorial, we will explore different ways of representing a complex number and mapping them on the complex plane.", "node_slug": "complex_analysis", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/imaginary_complex_precalc/complex_analysis", "extended_slug": "math/precalculus/imaginary_complex_precalc/complex_analysis", "kind": "Topic", "slug": "complex_analysis"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers/", "id": "exponential-form-complex-numbers", "hide": false, "title": "Exponential form of complex numbers", "child_data": [{"kind": "Video", "id": "x7818ca14"}, {"kind": "Exercise", "id": "1439973730"}, {"kind": "Video", "id": "xf6a4f54a"}, {"kind": "Exercise", "id": "1440119505"}, {"kind": "Video", "id": "8187549"}], "children": [{"path": "khan/math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers/complex-number-division/", "id": "xOa-l_tXgWA", "title": "Dividing complex numbers in polar and exponential form", "kind": "Video", "slug": "complex-number-division"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers/multiplying_and_dividing_complex_number_polar_forms/", "id": "multiplying_and_dividing_complex_number_polar_forms", "title": "Multiplying and dividing complex numbers in polar form", "description": "Multiply and divide complex numbers in polar form, and plot the answer by specifying the radius and angle.", "slug": "multiplying_and_dividing_complex_number_polar_forms", "kind": "Exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers/powers-of-complex-numbers/", "id": "dl_9NC_J6yo", "title": "Powers of complex numbers", "kind": "Video", "slug": "powers-of-complex-numbers"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers/powers_of_complex_numbers_1/", "id": "powers_of_complex_numbers_1", "title": "Powers of complex numbers", "description": "Use Euler's formula to determine the value of a complex number raised to an nth power.", "slug": "powers_of_complex_numbers_1", "kind": "Exercise"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers/exponential-form-to-find-complex-roots/", "id": "N0Y8ia57C24", "title": "Exponential form to find complex roots", "kind": "Video", "description": "Using exponential form to find complex roots", "slug": "exponential-form-to-find-complex-roots"}], "in_knowledge_map": false, "description": "", "node_slug": "exponential-form-complex-numbers", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers", "extended_slug": "math/precalculus/imaginary_complex_precalc/exponential-form-complex-numbers", "kind": "Topic", "slug": "exponential-form-complex-numbers"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/precalculus/imaginary_complex_precalc/complex_number_challenge/", "id": "complex_number_challenge", "hide": false, "title": "Challenging complex number problems", "child_data": [{"kind": "Video", "id": "8187445"}, {"kind": "Video", "id": "8187446"}, {"kind": "Video", "id": "8187447"}, {"kind": "Video", "id": "8187468"}], "children": [{"path": "khan/math/precalculus/imaginary_complex_precalc/complex_number_challenge/iit-jee-complex-numbers-part-1/", "id": "_5ei_I02huY", "title": "IIT JEE complex numbers (part 1)", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 1)", "slug": "iit-jee-complex-numbers-part-1"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_number_challenge/iit-jee-complex-numbers-part-2/", "id": "pQwoBOpVoWw", "title": "IIT JEE complex numbers (part 2)", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 2)", "slug": "iit-jee-complex-numbers-part-2"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_number_challenge/iit-jee-complex-numbers-part-3/", "id": "FwA_UZkI-JM", "title": "IIT JEE complex numbers (part 3)", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 3)", "slug": "iit-jee-complex-numbers-part-3"}, {"path": "khan/math/precalculus/imaginary_complex_precalc/complex_number_challenge/complex-determinant-example/", "id": "E7OkUomRq1Q", "title": "Complex determinant example", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 53 Complex Determinant", "slug": "complex-determinant-example"}], "in_knowledge_map": false, "description": "This tutorial goes through a fancy problem from the IIT JEE exam in India (competitive exam for getting into their top engineering schools). Whether or not you live in India, this is a good example to test whether you are a complex number rock star.", "node_slug": "complex_number_challenge", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/imaginary_complex_precalc/complex_number_challenge", "extended_slug": "math/precalculus/imaginary_complex_precalc/complex_number_challenge", "kind": "Topic", "slug": "complex_number_challenge"}], "in_knowledge_map": false, "description": "Understanding i and the complex plane", "node_slug": "imaginary_complex_precalc", "render_type": "Topic", "topic_page_url": "/math/precalculus/imaginary_complex_precalc", "extended_slug": "math/precalculus/imaginary_complex_precalc", "kind": "Topic", "slug": "imaginary_complex_precalc"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/precalculus/prob_comb/", "id": "prob_comb", "hide": false, "title": "Probability and combinatorics", "child_data": [{"kind": "Topic", "id": "x944c39f8"}, {"kind": "Topic", "id": "x11355f2a"}, {"kind": "Topic", "id": "x0c38289e"}, {"kind": "Topic", "id": "x2313d307"}, {"kind": "Topic", "id": "x62b12d7c"}, {"kind": "Topic", "id": "xd379d332"}, {"kind": "Topic", "id": "xc6045a72"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/prob_comb/basic_prob_precalc/", "id": "basic_prob_precalc", "hide": false, "title": "Basic probability", "child_data": [{"kind": "Video", "id": "185786265"}, {"kind": "Video", "id": "380860447"}, {"kind": "Video", "id": "60107867"}, {"kind": "Video", "id": "27091"}, {"kind": "Exercise", "id": "13179429"}], "children": [{"path": "khan/math/precalculus/prob_comb/basic_prob_precalc/basic-probability/", "id": "uzkc-qNVoOk", "title": "Probability explained", "kind": "Video", "description": "We give you an introduction to probability through the example of flipping a quarter and rolling a die.", "slug": "basic-probability"}, {"path": "khan/math/precalculus/prob_comb/basic_prob_precalc/simple-probability/", "id": "yUaI0JriZtY", "title": "Finding probablity example", "kind": "Video", "description": "In order to find the probability of picking a yellow marble from a bag, we have to first determine the number of possible outcomes and how then many of them meet our constraints.", "slug": "simple-probability"}, {"path": "khan/math/precalculus/prob_comb/basic_prob_precalc/probability-1-module-examples/", "id": "mLE-SlOZToc", "title": "Finding probablity example 2", "kind": "Video", "description": "In this example we are figuring out the probability of randomly picking a non-blue marble from a bag. Again, we'll have to think about the possible outcomes first.", "slug": "probability-1-module-examples"}, {"path": "khan/math/precalculus/prob_comb/basic_prob_precalc/events-and-outcomes-1/", "id": "cdRLBOnLTDk", "title": "Finding probablity example 3", "kind": "Video", "description": "Now we're working out the probability of randomly selecting a yellow marble from a bag of multi-colored marbles. Let's practice together.", "slug": "events-and-outcomes-1"}, {"path": "khan/math/precalculus/prob_comb/basic_prob_precalc/probability_1/", "id": "probability_1", "title": "Simple probability", "description": "Practice finding probabilities of events, such as rolling dice, drawing marbles out of a bag, and spinning spinners.", "slug": "probability_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "basic_prob_precalc", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/prob_comb/basic_prob_precalc", "extended_slug": "math/precalculus/prob_comb/basic_prob_precalc", "kind": "Topic", "slug": "basic_prob_precalc"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/precalculus/prob_comb/addition_rule_prob_precalc/", "id": "addition_rule_prob_precalc", "hide": false, "title": "Venn diagrams and the addition rule", "child_data": [{"kind": "Video", "id": "185786264"}, {"kind": "Video", "id": "188066789"}], "children": [{"path": "khan/math/precalculus/prob_comb/addition_rule_prob_precalc/probability-with-playing-cards-and-venn-diagrams/", "id": "obZzOq_wSCg", "title": "Probability with playing cards and Venn diagrams", "kind": "Video", "description": "Probability of compound events. The Addition Rule. Common Core Standard 457 S-CP.7", "slug": "probability-with-playing-cards-and-venn-diagrams"}, {"path": "khan/math/precalculus/prob_comb/addition_rule_prob_precalc/addition-rule-for-probability/", "id": "QE2uR6Z-NcU", "title": "Addition rule for probability", "kind": "Video", "description": "Venn diagrams and the addition rule for probability", "slug": "addition-rule-for-probability"}], "in_knowledge_map": false, "description": "What is the probability of getting a diamond or an ace from a deck of cards? Well I could get a diamond that is not an ace, an ace that is not a diamond, or the ace of diamonds. This tutorial helps us think these types of situations through a bit better (especially with the help of our good friend, the Venn diagram).", "node_slug": "addition_rule_prob_precalc", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/prob_comb/addition_rule_prob_precalc", "extended_slug": "math/precalculus/prob_comb/addition_rule_prob_precalc", "kind": "Topic", "slug": "addition_rule_prob_precalc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/prob_comb/independent_events_precalc/", "id": "independent_events_precalc", "hide": false, "title": "Compound, independent events", "child_data": [{"kind": "Video", "id": "191769945"}, {"kind": "Video", "id": "x3b1c6fb6"}, {"kind": "Video", "id": "x9c048c4d"}, {"kind": "Exercise", "id": "x6ec3cabf"}, {"kind": "Video", "id": "191769946"}, {"kind": "Video", "id": "27092"}, {"kind": "Video", "id": "753767269"}, {"kind": "Video", "id": "1022209423"}, {"kind": "Video", "id": "191769947"}, {"kind": "Video", "id": "27095"}, {"kind": "Video", "id": "27096"}, {"kind": "Exercise", "id": "757444186"}], "children": [{"path": "khan/math/precalculus/prob_comb/independent_events_precalc/compound-probability-of-independent-events/", "id": "xSc4oLA9e8o", "title": "Compound probability of independent events", "kind": "Video", "description": "You'll become familiar with the concept of independent events, or that one event in no way affects what happens in the second event. Keep in mind, too, that the sum of the probabilities of all the possible events should equal 1.", "slug": "compound-probability-of-independent-events"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/compound-events-tree-diagram/", "id": "4fBXIcO0It4", "title": "Compound events example with tree diagram", "kind": "Video", "slug": "compound-events-tree-diagram"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/compound-events-diagram/", "id": "9mU3MVtsqic", "title": "Compound events example using diagram", "kind": "Video", "slug": "compound-events-diagram"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/compound-events/", "id": "compound-events", "title": "Probabilities of compound events", "description": "Practice using sample space diagrams to find probabilities.", "slug": "compound-events", "kind": "Exercise"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/getting-at-least-one-heads/", "id": "mkyZ45KQYi4", "title": "Coin flipping probability", "kind": "Video", "description": "In this video, we 'll explore the probability of getting at least one heads in multiple flips of a fair coin.", "slug": "getting-at-least-one-heads"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/events-and-outcomes-2/", "id": "O4Qnsubo2tg", "title": "Die rolling probability", "kind": "Video", "description": "We're thinking about the probability of rolling doubles on a pair of dice. Let's create a grid of all possible outcomes.", "slug": "events-and-outcomes-2"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/lebron-asks-about-the-chances-of-making-10-free-throws/", "id": "iMqCSgqzmiQ", "title": "Free throwing probability", "kind": "Video", "description": "Our friend and Cleveland Cavalier, LeBron James, asks Sal how to determine the probability of making 10 free throws in a row. Hint: the answer is surprising!", "slug": "lebron-asks-about-the-chances-of-making-10-free-throws"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/lebron-asks-about-free-throws-versus-three-pointers/", "id": "PddbEVNMgTY", "title": "Three pointer vs free throwing probability", "kind": "Video", "description": "Our friend and Cleveland Cavalier, LeBron James, asks Sal if there's a high probability of making three free throws in a row or one three-pointer. Before solving the problem, jot down what you think the answer will be!", "slug": "lebron-asks-about-free-throws-versus-three-pointers"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/frequency-probability-and-unfair-coins/", "id": "RI874OSJp1U", "title": "Probability without equally likely events", "kind": "Video", "description": "Up until now, we've looked at probabilities surrounding only equally likely events. What about probabilities when we don't have equally likely events? Say, we have unfair coins?", "slug": "frequency-probability-and-unfair-coins"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/independent-events-2/", "id": "VWAfEbgf1Po", "title": "Test taking probability and independent events", "kind": "Video", "description": "Have you ever taken a test and discovered you have no choice but to guess on a couple of problems? In this example problem, we are considering the probability of two independent events occurring.", "slug": "independent-events-2"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/independent-events-3/", "id": "2MYA8Ba2PvM", "title": "Die rolling probability with independent events", "kind": "Video", "description": "We hope you're not a gambler, but if you had to bet on whether you can roll even numbers three times in a row, you might want to figure this probability first.", "slug": "independent-events-3"}, {"path": "khan/math/precalculus/prob_comb/independent_events_precalc/independent_probability/", "id": "independent_probability", "title": "Independent probability", "slug": "independent_probability", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What is the probability of making three free throws in a row (LeBron literally asks this in this tutorial).\n\nIn this tutorial, we'll explore compound events happening where the probability of one event is not dependent on the outcome of another (compound, independent, events).", "node_slug": "independent_events_precalc", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/prob_comb/independent_events_precalc", "extended_slug": "math/precalculus/prob_comb/independent_events_precalc", "kind": "Topic", "slug": "independent_events_precalc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/prob_comb/dependent_events_precalc/", "id": "dependent_events_precalc", "hide": false, "title": "Dependent events", "child_data": [{"kind": "Video", "id": "1200026245"}, {"kind": "Video", "id": "94879656"}, {"kind": "Video", "id": "27094"}, {"kind": "Video", "id": "94879657"}, {"kind": "Exercise", "id": "13179407"}, {"kind": "Video", "id": "878209052"}], "children": [{"path": "khan/math/precalculus/prob_comb/dependent_events_precalc/introduction-to-dependent-probability/", "id": "VjLEoo3hIoM", "title": "Dependent probability introduction", "kind": "Video", "description": "Let's get you started with a great explanation of dependent probability using a scenario involving a casino game.", "slug": "introduction-to-dependent-probability"}, {"path": "khan/math/precalculus/prob_comb/dependent_events_precalc/dependent-probability-example-1/", "id": "xPUm5SUVzTE", "title": "Dependent probability example", "kind": "Video", "description": "We're thinking about how the probability of an event can be dependent on another event occuring in this example problem.", "slug": "dependent-probability-example-1"}, {"path": "khan/math/precalculus/prob_comb/dependent_events_precalc/independent-events-1/", "id": "Za7G_eWKiF4", "title": "Independent or dependent probability event?", "kind": "Video", "description": "This time around we're not going to tell you whether we're working on a dependent or independent probability event problem. You tell us!", "slug": "independent-events-1"}, {"path": "khan/math/precalculus/prob_comb/dependent_events_precalc/dependent-probability-example-2/", "id": "7BkcNLOf56w", "title": "Dependent probability example 2", "kind": "Video", "description": "It's important to practice these probability problems as they get more complex eventually. Take a stab on this one...with our help, of course.", "slug": "dependent-probability-example-2"}, {"path": "khan/math/precalculus/prob_comb/dependent_events_precalc/dependent_probability/", "id": "dependent_probability", "title": "Dependent probability", "slug": "dependent_probability", "kind": "Exercise"}, {"path": "khan/math/precalculus/prob_comb/dependent_events_precalc/monty-hall-problem/", "id": "Xp6V_lO1ZKA", "title": "Probability and the Monty Hall problem", "kind": "Video", "description": "Here we have a presentation and analysis of the famous thought experiment: the \"Monty Hall\" problem! This is fun.", "slug": "monty-hall-problem"}], "in_knowledge_map": false, "description": "What's the probability of picking two \"e\" from the bag in scrabble (assuming that I don't replace the tiles). Well, the probability of picking an 'e' on your second try depends on what happened in the first (if you picked an 'e' the first time around, then there is one less 'e' in the bag). This is just one of many, many type of scenarios involving dependent probability.", "node_slug": "dependent_events_precalc", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/prob_comb/dependent_events_precalc", "extended_slug": "math/precalculus/prob_comb/dependent_events_precalc", "kind": "Topic", "slug": "dependent_events_precalc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/prob_comb/combinatorics_precalc/", "id": "combinatorics_precalc", "hide": false, "title": "Permutations", "child_data": [{"kind": "Video", "id": "xc7e724ce"}, {"kind": "Video", "id": "x26c39251"}, {"kind": "Video", "id": "x66bfedb8"}, {"kind": "Video", "id": "xdb036a16"}, {"kind": "Video", "id": "27097"}, {"kind": "Video", "id": "27098"}, {"kind": "Exercise", "id": "917305998"}], "children": [{"path": "khan/math/precalculus/prob_comb/combinatorics_precalc/factorial-and-counting-seat-arrangements/", "id": "Z1zdkcwosD4", "title": "Factorial and counting seat arrangements", "kind": "Video", "slug": "factorial-and-counting-seat-arrangements"}, {"path": "khan/math/precalculus/prob_comb/combinatorics_precalc/permutation-formula/", "id": "DROZVHObeko", "title": "Permutation formula", "kind": "Video", "slug": "permutation-formula"}, {"path": "khan/math/precalculus/prob_comb/combinatorics_precalc/possible-three-letter-words/", "id": "VYbqG2NuOo8", "title": "Possible three letter words", "kind": "Video", "slug": "possible-three-letter-words"}, {"path": "khan/math/precalculus/prob_comb/combinatorics_precalc/zero-factorial-or-0/", "id": "HGoZfzz6dU0", "title": "Zero factorial or 0!", "kind": "Video", "slug": "zero-factorial-or-0"}, {"path": "khan/math/precalculus/prob_comb/combinatorics_precalc/permutations-and-combinations-1/", "id": "oQpKtm5TtxU", "title": "Example: Ways to arrange colors", "kind": "Video", "description": "Thinking about how many ways you can pick four colors from a group of 6", "slug": "permutations-and-combinations-1"}, {"path": "khan/math/precalculus/prob_comb/combinatorics_precalc/permutations-and-combinations-2/", "id": "v9NLtiVt3XY", "title": "Example: Ways to pick officers", "kind": "Video", "description": "How many ways can we pick officers for our organization?", "slug": "permutations-and-combinations-2"}, {"path": "khan/math/precalculus/prob_comb/combinatorics_precalc/permutations_1/", "id": "permutations_1", "title": "Permutations", "description": "Introductory permutation problems.", "slug": "permutations_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You want to display your Chuck Norris dolls on your desk at school and there is only room for five of them. Unfortunately, you own 50. How many ways can you pick the dolls and arrange them on your desk?", "node_slug": "combinatorics_precalc", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/prob_comb/combinatorics_precalc", "extended_slug": "math/precalculus/prob_comb/combinatorics_precalc", "kind": "Topic", "slug": "combinatorics_precalc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/prob_comb/combinations/", "id": "combinations", "hide": false, "title": "Combinations", "child_data": [{"kind": "Video", "id": "xe7fa4091"}, {"kind": "Video", "id": "x4a534332"}, {"kind": "Video", "id": "x70c33285"}, {"kind": "Video", "id": "27099"}, {"kind": "Exercise", "id": "937485754"}, {"kind": "Exercise", "id": "937561152"}], "children": [{"path": "khan/math/precalculus/prob_comb/combinations/introduction-to-combinations/", "id": "iKy-d5_erhI", "title": "Introduction to combinations", "kind": "Video", "slug": "introduction-to-combinations"}, {"path": "khan/math/precalculus/prob_comb/combinations/combination-formula/", "id": "p8vIcmr_Pqo", "title": "Combination formula", "kind": "Video", "slug": "combination-formula"}, {"path": "khan/math/precalculus/prob_comb/combinations/handshaking-combinations/", "id": "boH4l1SgJbM", "title": "Handshaking combinations", "kind": "Video", "slug": "handshaking-combinations"}, {"path": "khan/math/precalculus/prob_comb/combinations/permutations-and-combinations-3/", "id": "SbpoyXTpC84", "title": "Example: 9 card hands", "kind": "Video", "description": "Thinking about how many ways we can construct a hand of 9 cards", "slug": "permutations-and-combinations-3"}, {"path": "khan/math/precalculus/prob_comb/combinations/combinations_1/", "id": "combinations_1", "title": "Combinations", "description": "Introductory combination problems", "slug": "combinations_1", "kind": "Exercise"}, {"path": "khan/math/precalculus/prob_comb/combinations/permutations_and_combinations_2/", "id": "permutations_and_combinations_2", "title": "Permutations and combinations", "description": "Permutations and Combinations with overcounting", "slug": "permutations_and_combinations_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You are already familiar with calculating permutation (\"How many ways could 7 different people sit in 4 different seats?\"). But what if you didn't care about which seat they sat in? What if you just cared about which 4 people were in the car? Or put another way, you want to know how many combinations of 4 people can you stick in the car from a pool of 7 candidates. Or how many ways are there to choose 4 things from a pool of 7? Look no further than this tutorial to answer your questions.", "node_slug": "combinations", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/prob_comb/combinations", "extended_slug": "math/precalculus/prob_comb/combinations", "kind": "Topic", "slug": "combinations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/", "id": "prob_combinatorics_precalc", "hide": false, "title": "Probability using combinatorics", "child_data": [{"kind": "Video", "id": "27093"}, {"kind": "Video", "id": "380860449"}, {"kind": "Video", "id": "193210641"}, {"kind": "Video", "id": "25853"}, {"kind": "Video", "id": "25851"}, {"kind": "Video", "id": "193210640"}, {"kind": "Video", "id": "27101"}, {"kind": "Video", "id": "27102"}, {"kind": "Video", "id": "27100"}, {"kind": "Video", "id": "690344673"}, {"kind": "Video", "id": "193210639"}, {"kind": "Video", "id": "1317894497"}, {"kind": "Video", "id": "25857"}, {"kind": "Exercise", "id": "956845911"}], "children": [{"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/events-and-outcomes-3/", "id": "3_otNr9kRuY", "title": "Example: Probability through counting outcomes", "kind": "Video", "description": "The probability of getting exactly 2 heads when flipping three coins. Thinking about this by visualy depicting all of the outcomes.", "slug": "events-and-outcomes-3"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/coin-flipping-example/", "id": "3UlE8gyKbkU", "title": "Example: All the ways you can flip a coin", "kind": "Video", "description": "Manually going through the combinatorics to determine the probability of an event occuring", "slug": "coin-flipping-example"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/getting-exactly-two-heads-combinatorics/", "id": "8TIben0bJpU", "title": "Getting exactly two heads (combinatorics)", "kind": "Video", "description": "A different way to think about the probability of getting 2 heads in 4 flips", "slug": "getting-exactly-two-heads-combinatorics"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/probability-and-combinations-part-2/", "id": "W7DmsJKLoxc", "title": "Probability and combinations (part 2)", "kind": "Video", "description": "Making at least 3 out of 5 free throws.", "slug": "probability-and-combinations-part-2"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/probability-using-combinations/", "id": "Xqfcy1rqMbI", "title": "Probability using combinations", "kind": "Video", "description": "Probability of getting exactly 3 heads in 8 flips of a fair coin.", "slug": "probability-using-combinations"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/exactly-three-heads-in-five-flips/", "id": "udG9KhNMKJw", "title": "Exactly three heads in five flips", "kind": "Video", "description": "Probability of exactly 3 heads in 5 flips using combinations", "slug": "exactly-three-heads-in-five-flips"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/probability-of-dependent-events/", "id": "l9ft9jpriNA", "title": "Example: Different ways to pick officers", "kind": "Video", "description": "Thinking about the different ways we can pick officers in order to find the probability of one situation in particular.", "slug": "probability-of-dependent-events"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/probability-of-dependent-events-2/", "id": "ccrYD6iX_SY", "title": "Example: Combinatorics and probability", "kind": "Video", "description": "Probability of getting a set of cards", "slug": "probability-of-dependent-events-2"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/permutations-and-combinations-4/", "id": "DIjlllgq3dc", "title": "Example: Lottery probability", "kind": "Video", "description": "What is the probability of winning a 4-number lottery?", "slug": "permutations-and-combinations-4"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/mega-millions-jackpot-probability/", "id": "gyqodNhM3EU", "title": "Mega millions jackpot probability", "kind": "Video", "description": "Probability of winning the Mega Millions jackpot", "slug": "mega-millions-jackpot-probability"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/generalizing-with-binomial-coefficients-bit-advanced/", "id": "AOsWph2FNLw", "title": "Generalizing with binomial coefficients (bit advanced)", "kind": "Video", "description": "Conceptual understanding of where the formula for binomial coefficients come from", "slug": "generalizing-with-binomial-coefficients-bit-advanced"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/bayes-theorem-visualized/", "id": "Zxm4Xxvzohk", "title": "Conditional probability warmup", "kind": "Video", "description": "Conditional probability visualized using trees.", "slug": "bayes-theorem-visualized"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/birthday-probability-problem/", "id": "9G0w61pZPig", "title": "Birthday probability problem", "kind": "Video", "description": "The probability that at least 2 people in a room of 30 share the same birthday.", "slug": "birthday-probability-problem"}, {"path": "khan/math/precalculus/prob_comb/prob_combinatorics_precalc/probability_with_perm_comb/", "id": "probability_with_perm_comb", "title": "Probability with permutations and combinations", "description": "Probability questions using permutations and combinations of objects", "slug": "probability_with_perm_comb", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial will apply the permutation and combination tools you learned in the last tutorial to problems of probability. You'll finally learn that there may be better \"investments\" than poring all your money into the Powerball Lottery.", "node_slug": "prob_combinatorics_precalc", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/prob_comb/prob_combinatorics_precalc", "extended_slug": "math/precalculus/prob_comb/prob_combinatorics_precalc", "kind": "Topic", "slug": "prob_combinatorics_precalc"}], "in_knowledge_map": false, "description": "Basics of probability and combinatorics", "node_slug": "prob_comb", "render_type": "Topic", "topic_page_url": "/math/precalculus/prob_comb", "extended_slug": "math/precalculus/prob_comb", "kind": "Topic", "slug": "prob_comb"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/precalculus/seq_induction/", "id": "seq_induction", "hide": false, "title": "Sequences, series and induction", "child_data": [{"kind": "Topic", "id": "x529d8281"}, {"kind": "Topic", "id": "x68e77953"}, {"kind": "Topic", "id": "xc565a9b0"}, {"kind": "Topic", "id": "x8b070f29"}, {"kind": "Topic", "id": "x8b0efae1"}, {"kind": "Topic", "id": "x75114185"}, {"kind": "Topic", "id": "x23f4a2b2"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/precalculus/seq_induction/proof_by_induction/", "id": "proof_by_induction", "hide": false, "title": "Induction", "child_data": [{"kind": "Video", "id": "193202564"}, {"kind": "Video", "id": "193202563"}], "children": [{"path": "khan/math/precalculus/seq_induction/proof_by_induction/proof-by-induction/", "id": "wblW_M_HVQ8", "title": "Proof by induction", "kind": "Video", "description": "Proving an expression for the sum of all positive integers up to and including n by induction", "slug": "proof-by-induction"}, {"path": "khan/math/precalculus/seq_induction/proof_by_induction/alternate-proof-to-induction-for-integer-sum/", "id": "1wnIsgUivEQ", "title": "Alternate proof to induction for integer sum", "kind": "Video", "description": "Another way to prove the expression for the sum of all positive integers up to and including n", "slug": "alternate-proof-to-induction-for-integer-sum"}], "in_knowledge_map": false, "description": "Proof by induction is a core tool. This tutorial walks you through the general idea that if 1) something is true for a base case (say when n=1) and 2) if it is true for n, then it is also true for n+1, then it must be true for all n! Amazing!", "node_slug": "proof_by_induction", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/seq_induction/proof_by_induction", "extended_slug": "math/precalculus/seq_induction/proof_by_induction", "kind": "Topic", "slug": "proof_by_induction"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/seq_induction/seq-and-series/", "id": "seq-and-series", "hide": false, "title": "Basic sequences and series", "child_data": [{"kind": "Video", "id": "1383721311"}, {"kind": "Video", "id": "1383600767"}, {"kind": "Exercise", "id": "1383501473"}, {"kind": "Video", "id": "26789"}, {"kind": "Video", "id": "26788"}, {"kind": "Exercise", "id": "1383308880"}, {"kind": "Exercise", "id": "xcc6cb393"}, {"kind": "Exercise", "id": "x1a16d98e"}, {"kind": "Video", "id": "1393021992"}, {"kind": "Article", "id": "xffdd2ee6"}, {"kind": "Exercise", "id": "1383472697"}], "children": [{"path": "khan/math/precalculus/seq_induction/seq-and-series/explicit-and-recursive-definitions-of-sequences/", "id": "KRFiAlo7t1E", "title": "Introduction to sequences", "kind": "Video", "description": "Sal explains what sequences are and gives examples of different sequences, defined either explicitly or recursively, and discusses different notations for sequences.", "slug": "explicit-and-recursive-definitions-of-sequences"}, {"path": "khan/math/precalculus/seq_induction/seq-and-series/arithmetic-sequences/", "id": "_cooC3yG_p0", "title": "Introduction to arithmetic sequences", "kind": "Video", "description": "Sal introduces arithmetic sequences and their main features, the initial term and the common difference. He gives various examples of such sequences, defined explicitly and recursively.", "slug": "arithmetic-sequences"}, {"path": "khan/math/precalculus/seq_induction/seq-and-series/arithmetic_sequences_1/", "id": "arithmetic_sequences_1", "title": "Find the next term of an arithmetic sequence, given the first few terms", "description": "Solve problems such as:\u00a0The first four terms of an arithmetic sequence are\u00a0-5, -1, 3, and 7.\u00a0What is the fifth term in the sequence?", "slug": "arithmetic_sequences_1", "kind": "Exercise"}, {"path": "khan/math/precalculus/seq_induction/seq-and-series/finding-the-100th-term-in-a-sequence/", "id": "JtsyP0tnVRY", "title": "How to find the 100th term of a sequence given the first four terms (example)", "kind": "Video", "description": "Sal solves the following problem: What is the value of the 100th term in the sequence 15, 9, 3, -3...", "slug": "finding-the-100th-term-in-a-sequence"}, {"path": "khan/math/precalculus/seq_induction/seq-and-series/equations-of-sequence-patterns/", "id": "_3BnyEr5fG4", "title": "Equations of sequence patterns", "kind": "Video", "description": "Equations of Sequence Patterns", "slug": "equations-of-sequence-patterns"}, {"path": "khan/math/precalculus/seq_induction/seq-and-series/arithmetic_sequences_2/", "id": "arithmetic_sequences_2", "title": "Find any term of an arithmetic sequence, given the formula of the sequence", "description": "Given an arithmetic sequence, ether in explicit form or in recursive form, find a specific term in the sequence.", "slug": "arithmetic_sequences_2", "kind": "Exercise"}, {"path": "khan/math/precalculus/seq_induction/seq-and-series/explicit-formulas-for-arithmetic-sequences/", "id": "explicit-formulas-for-arithmetic-sequences", "title": "Find explicit formulas for arithmetic sequences", "description": "Solve problems such as: The first four terms in an arithmetic sequence are 12, 5, -2, and -9. Find an explicit formula for the sequence.", "slug": "explicit-formulas-for-arithmetic-sequences", "kind": "Exercise"}, {"path": "khan/math/precalculus/seq_induction/seq-and-series/recursive-formulas-for-arithmetic-sequences/", "id": "recursive-formulas-for-arithmetic-sequences", "title": "Find recursive formulas for arithmetic sequences", "description": "Find the recursive formula of an arithmetic sequence given the first few terms or given an explicit formula. Convert a recursive formula to an explicit formula.", "slug": "recursive-formulas-for-arithmetic-sequences", "kind": "Exercise"}, {"path": "khan/math/precalculus/seq_induction/seq-and-series/series-as-sum-of-sequence/", "id": "rcRg_gO7-7E", "title": "Series as sum of sequence", "kind": "Video", "slug": "series-as-sum-of-sequence"}, {"path": "khan/math/precalculus/seq_induction/seq-and-series/arithmetic_series/", "id": "arithmetic_series", "title": "Arithmetic series", "description": "Find the sum of the first n terms of an arithmetic sequence.", "slug": "arithmetic_series", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This sequence (pun intended) of videos and exercises will help us explore ordered lists of objects--even infinite ones--that often have some pattern to them. We will then explore constructing sequences where the nth term is the sum of the first n terms of another sequence (series). This is surprisingly useful in a whole series (pun intended) of applications from finance to drug dosage.", "node_slug": "seq-and-series", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/seq_induction/seq-and-series", "extended_slug": "math/precalculus/seq_induction/seq-and-series", "kind": "Topic", "slug": "seq-and-series"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/", "id": "precalc-geometric-sequences", "hide": false, "title": "Geometric sequences", "child_data": [{"kind": "Video", "id": "23698"}, {"kind": "Video", "id": "1383732207"}, {"kind": "Exercise", "id": "1383425796"}, {"kind": "Exercise", "id": "1383464822"}, {"kind": "Exercise", "id": "x65c67654"}, {"kind": "Video", "id": "x9e46afe9"}, {"kind": "Exercise", "id": "x426bd96c"}, {"kind": "Exercise", "id": "x9eaf696f"}], "children": [{"path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/geometric-sequences-introduction/", "id": "pXo0bG4iAyg", "title": "Introduction to geometric sequences", "kind": "Video", "description": "Sal introduces\u00a0geometric sequences\u00a0and their main features, the\u00a0initial term\u00a0and the\u00a0common ratio.", "slug": "geometric-sequences-introduction"}, {"path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/geometric-sequences/", "id": "dIGLhLMsy2U", "title": "Geometric sequences", "kind": "Video", "slug": "geometric-sequences"}, {"path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/geometric_sequences_1/", "id": "geometric_sequences_1", "title": "Find the next term of a geometric sequence, given the first few terms", "description": "Solve problems such as:\u00a0The first four terms of a geometric sequence are\u00a064. -32. 16, and -8.\u00a0What is the fifth term in the sequence?", "slug": "geometric_sequences_1", "kind": "Exercise"}, {"path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/geometric_sequences_2/", "id": "geometric_sequences_2", "title": "Find any term of a geometric sequence, given the formula of the sequence", "description": "Given a geometric sequence, ether in explicit form or in recursive form, find a specific term in the sequence.", "slug": "geometric_sequences_2", "kind": "Exercise"}, {"path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/sequences-as-functions/", "id": "sequences-as-functions", "title": "Find explicit formulas for geometric sequences", "description": "Solve problems such as: The first four terms in a geometric sequence are 1/3, 1, 3, and 9. Find an explicit formula for the sequence.", "slug": "sequences-as-functions", "kind": "Exercise"}, {"path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/converting-an-explicit-function-to-a-recursive-function/", "id": "Iq7a2vEsT-o", "title": "How to convert an explicit formula of a geometric sequence to a recursive formula (example)", "kind": "Video", "description": "Sal solves the following problem: The explicit formula of a geometric sequence is g(x)=9*8^(x-1). Find the recursive formula of the sequence.", "slug": "converting-an-explicit-function-to-a-recursive-function"}, {"path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/recursive-formulas-for-geometric-sequences/", "id": "recursive-formulas-for-geometric-sequences", "title": "Find recursive formulas for geometric sequences", "description": "Find the recursive formula of a geometric sequence given the first few terms or given an explicit formula. Convert a recursive formula to an explicit formula.", "slug": "recursive-formulas-for-geometric-sequences", "kind": "Exercise"}, {"path": "khan/math/precalculus/seq_induction/precalc-geometric-sequences/recursive_explicit/", "id": "recursive_explicit", "title": "Model real-world situations with arithmetic and geometric sequences", "description": "Given a verbal description of a real-world relationship, determine the sequence that models that relationship.", "slug": "recursive_explicit", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What happens when the ratio between successive terms in a sequence is the same (or it has a \"common ratio\")? Well, then we'd be dealing with a geometric sequence (which comes up extremely frequently in mathematics).", "node_slug": "precalc-geometric-sequences", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/seq_induction/precalc-geometric-sequences", "extended_slug": "math/precalculus/seq_induction/precalc-geometric-sequences", "kind": "Topic", "slug": "precalc-geometric-sequences"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/seq_induction/geometric-sequence-series/", "id": "geometric-sequence-series", "hide": false, "title": "Finite geometric series", "child_data": [{"kind": "Video", "id": "xea358b4a"}, {"kind": "Video", "id": "x8bcd35c6"}, {"kind": "Video", "id": "x363f77ba"}, {"kind": "Video", "id": "x9ba70b9b"}, {"kind": "Video", "id": "23574"}, {"kind": "Exercise", "id": "x71fc8537"}, {"kind": "Exercise", "id": "xde582efe"}], "children": [{"path": "khan/math/precalculus/seq_induction/geometric-sequence-series/sigma-notation-sum/", "id": "5jwXThH6fg4", "title": "Sigma notation for sums", "kind": "Video", "slug": "sigma-notation-sum"}, {"path": "khan/math/precalculus/seq_induction/geometric-sequence-series/geometric-series-introduction/", "id": "CecgFWTg9pQ", "title": "Geometric series", "kind": "Video", "slug": "geometric-series-introduction"}, {"path": "khan/math/precalculus/seq_induction/geometric-sequence-series/geometric-series/", "id": "i8THsl3AYFI", "title": "Formula for a finite geometric series", "kind": "Video", "slug": "geometric-series"}, {"path": "khan/math/precalculus/seq_induction/geometric-sequence-series/geometric-series-word-problem/", "id": "aIjzkiijGnA", "title": "Constructing a geometric series for new users", "kind": "Video", "slug": "geometric-series-word-problem"}, {"path": "khan/math/precalculus/seq_induction/geometric-sequence-series/geometric-series-sum-to-figure-out-mortgage-payments/", "id": "i05-okb1EJg", "title": "Geometric series sum to figure out mortgage payments", "kind": "Video", "description": "Figuring out the formula for fixed mortgage payments using the sum of a geometric series", "slug": "geometric-series-sum-to-figure-out-mortgage-payments"}, {"path": "khan/math/precalculus/seq_induction/geometric-sequence-series/geometric-series-1/", "id": "geometric-series--1", "title": "Calculating finite geometric series", "slug": "geometric-series-1", "kind": "Exercise"}, {"path": "khan/math/precalculus/seq_induction/geometric-sequence-series/geometric-series_1/", "id": "geometric-series", "title": "Finite geometric series word problems", "description": "Understanding and solving problems with the formula for a finite geometric series", "slug": "geometric-series_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Whether you are computing mortgage payments or calculating how many users your website will have after a few years, geometric series show up in life far more than you imagine. This tutorial will review all the important concepts and more!", "node_slug": "geometric-sequence-series", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/seq_induction/geometric-sequence-series", "extended_slug": "math/precalculus/seq_induction/geometric-sequence-series", "kind": "Topic", "slug": "geometric-sequence-series"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/seq_induction/infinite-geometric-series/", "id": "infinite-geometric-series", "hide": false, "title": "Infinite geometric series", "child_data": [{"kind": "Video", "id": "xc809ee47"}, {"kind": "Video", "id": "x16f67abe"}, {"kind": "Video", "id": "x9a18b2d7"}, {"kind": "Video", "id": "x9a32c336"}, {"kind": "Video", "id": "xb23a1b53"}, {"kind": "Exercise", "id": "x1264b701"}, {"kind": "Exercise", "id": "x05d70249"}], "children": [{"path": "khan/math/precalculus/seq_induction/infinite-geometric-series/infinite-geometric-series/", "id": "b-7kCymoUpg", "title": "Sum of an infinite geometric series", "kind": "Video", "slug": "infinite-geometric-series"}, {"path": "khan/math/precalculus/seq_induction/infinite-geometric-series/deriving-geometric-series-sum-formula/", "id": "wqnpSzEzq1w", "title": "Another derivation of the sum of an infinite geometric series", "kind": "Video", "slug": "deriving-geometric-series-sum-formula"}, {"path": "khan/math/precalculus/seq_induction/infinite-geometric-series/geometric-series-convergence-divergence/", "id": "KNrEAJeRIdo", "title": "Geometric series convergence and divergence examples", "kind": "Video", "slug": "geometric-series-convergence-divergence"}, {"path": "khan/math/precalculus/seq_induction/infinite-geometric-series/repeating-decimal-geometric-series/", "id": "2BgWWsypzLA", "title": "Repeating decimal as infinite geometric series", "kind": "Video", "slug": "repeating-decimal-geometric-series"}, {"path": "khan/math/precalculus/seq_induction/infinite-geometric-series/bouncing-ball-distance/", "id": "tqTJZEglrvc", "title": "Vertical distance of bouncing ball", "kind": "Video", "slug": "bouncing-ball-distance"}, {"path": "khan/math/precalculus/seq_induction/infinite-geometric-series/understanding-series/", "id": "understanding-series", "title": "Understanding series", "slug": "understanding-series", "kind": "Exercise"}, {"path": "khan/math/precalculus/seq_induction/infinite-geometric-series/geometric-series-of-constants/", "id": "geometric-series-of-constants", "title": "Infinite geometric series", "description": "Applying the formula for an infinite geometric series", "slug": "geometric-series-of-constants", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You're already familiar with finite geometric series, but you don't want the summation to stop!! What happens if you keep adding? The terms are getting small fast! Can it be that the sum of an infinite number of rapidly shrinking terms can be finite! Yes, often times it can! Mind-blowing! Stupendous!", "node_slug": "infinite-geometric-series", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/seq_induction/infinite-geometric-series", "extended_slug": "math/precalculus/seq_induction/infinite-geometric-series", "kind": "Topic", "slug": "infinite-geometric-series"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/precalculus/seq_induction/advanced-sequences-series/", "id": "advanced-sequences-series", "hide": false, "title": "Advanced sequences and series", "child_data": [{"kind": "Video", "id": "13179258"}, {"kind": "Video", "id": "8187469"}], "children": [{"path": "khan/math/precalculus/seq_induction/advanced-sequences-series/2003-aime-ii-problem-8/", "id": "ZFN63oTeYzc", "title": "2003 AIME II problem 8", "kind": "Video", "description": "Sequence from the product of 2 arithmetic sequences", "slug": "2003-aime-ii-problem-8"}, {"path": "khan/math/precalculus/seq_induction/advanced-sequences-series/series-sum-example/", "id": "A6fbDssPeac", "title": "Series sum example", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 54 Series Sum", "slug": "series-sum-example"}], "in_knowledge_map": false, "description": "You understand what sequences and series are and the mathematical notation for them. This tutorial takes things further by exploring ideas of convergence divergence and other, more challenging topics.", "node_slug": "advanced-sequences-series", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/seq_induction/advanced-sequences-series", "extended_slug": "math/precalculus/seq_induction/advanced-sequences-series", "kind": "Topic", "slug": "advanced-sequences-series"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/", "id": "deductive-and-inductive-reasoning", "hide": false, "title": "Deductive and inductive reasoning", "child_data": [{"kind": "Video", "id": "27088"}, {"kind": "Video", "id": "27089"}, {"kind": "Video", "id": "27090"}, {"kind": "Video", "id": "27085"}, {"kind": "Video", "id": "27086"}, {"kind": "Video", "id": "27087"}, {"kind": "Video", "id": "2600591"}], "children": [{"path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/deductive-reasoning-1/", "id": "GEId0GonOZM", "title": "Difference between inductive and deductive reasoning", "kind": "Video", "description": "Deductive Reasoning 1", "slug": "deductive-reasoning-1"}, {"path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/deductive-reasoning-2/", "id": "VMEV__2wW3E", "title": "Deductive reasoning 2", "kind": "Video", "description": "Deductive Reasoning 2", "slug": "deductive-reasoning-2"}, {"path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/deductive-reasoning-3/", "id": "lYLaaMObgkw", "title": "Deductive reasoning 3", "kind": "Video", "description": "Deductive Reasoning 3", "slug": "deductive-reasoning-3"}, {"path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/u12-l1-t3-we1-inductive-reasoning-1/", "id": "MnQ7Lizkpqk", "title": "Inductive reasoning 1", "kind": "Video", "description": "Inductive Reasoning 1", "slug": "u12-l1-t3-we1-inductive-reasoning-1"}, {"path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/inductive-reasoning-2/", "id": "ZSsBh4Ybbj8", "title": "Inductive reasoning 2", "kind": "Video", "description": "Inductive Reasoning 2", "slug": "inductive-reasoning-2"}, {"path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/inductive-reasoning-3/", "id": "pgfWkaySFGY", "title": "Inductive reasoning 3", "kind": "Video", "description": "Inductive Reasoning 3", "slug": "inductive-reasoning-3"}, {"path": "khan/math/precalculus/seq_induction/deductive-and-inductive-reasoning/u03-l1-t1-we2-inductive-patterns/", "id": "GvbrtnEYRpY", "title": "Inductive patterns", "kind": "Video", "description": "Inductive Patterns", "slug": "u03-l1-t1-we2-inductive-patterns"}], "in_knowledge_map": false, "description": "You will hear the words \"deductive reasoning\" and \"inductive reasoning\" throughout your life. This very optional tutorial will give you context for what these mean.", "node_slug": "deductive-and-inductive-reasoning", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/seq_induction/deductive-and-inductive-reasoning", "extended_slug": "math/precalculus/seq_induction/deductive-and-inductive-reasoning", "kind": "Topic", "slug": "deductive-and-inductive-reasoning"}], "in_knowledge_map": false, "description": "An assortment of concepts in math that help us deal with sequences and proofs.", "node_slug": "seq_induction", "render_type": "Topic", "topic_page_url": "/math/precalculus/seq_induction", "extended_slug": "math/precalculus/seq_induction", "kind": "Topic", "slug": "seq_induction"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/precalculus/hyperbolic_trig_topic/", "id": "hyperbolic_trig_topic", "hide": false, "title": "Hyperbolic functions", "child_data": [{"kind": "Topic", "id": "x1f0c489f"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/hyperbolic_trig_topic/hyperbolic_trig_intro/", "id": "hyperbolic_trig_intro", "hide": false, "title": "Intro to hyperbolic functions", "child_data": [{"kind": "Video", "id": "1254452010"}, {"kind": "Video", "id": "1254712334"}, {"kind": "Exercise", "id": "213250823"}], "children": [{"path": "khan/math/precalculus/hyperbolic_trig_topic/hyperbolic_trig_intro/hyperbolic-trig-function-inspiration/", "id": "zd3RyRk6wYI", "title": "Hyperbolic function inspiration", "kind": "Video", "description": "Exploring a motivation for even defining hyperbolic sine and cosine", "slug": "hyperbolic-trig-function-inspiration"}, {"path": "khan/math/precalculus/hyperbolic_trig_topic/hyperbolic_trig_intro/hyperbolic-trig-functions-and-the-unit-hyperbola/", "id": "Wfpb-fniSSk", "title": "Hyperbolic functions and the unit hyperbola", "kind": "Video", "description": "Why they are called hyperbolic functions", "slug": "hyperbolic-trig-functions-and-the-unit-hyperbola"}, {"path": "khan/math/precalculus/hyperbolic_trig_topic/hyperbolic_trig_intro/equation_of_a_hyperbola/", "id": "equation_of_a_hyperbola", "title": "Asymptotes of a hyperbola", "description": "Find the asymptotes of a hyperbola based on the equation.", "slug": "equation_of_a_hyperbola", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You know your regular trig functions that are defined with the help of the unit circle. We will now define a new class of functions constructed from exponentials that have an eery resemblance to those classic trig functions (but are still quite different).", "node_slug": "hyperbolic_trig_intro", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/hyperbolic_trig_topic/hyperbolic_trig_intro", "extended_slug": "math/precalculus/hyperbolic_trig_topic/hyperbolic_trig_intro", "kind": "Topic", "slug": "hyperbolic_trig_intro"}], "in_knowledge_map": false, "description": "Motivation and understanding of hyperbolic functions.", "node_slug": "hyperbolic_trig_topic", "render_type": "Topic", "topic_page_url": "/math/precalculus/hyperbolic_trig_topic", "extended_slug": "math/precalculus/hyperbolic_trig_topic", "kind": "Topic", "slug": "hyperbolic_trig_topic"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/precalculus/partial-fraction-expans/", "id": "partial-fraction-expans", "hide": false, "title": "Partial fraction expansion", "child_data": [{"kind": "Topic", "id": "xdd3e0c23"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/partial-fraction-expans/partial-fraction/", "id": "partial-fraction", "hide": false, "title": "Partial fraction expansion", "child_data": [{"kind": "Video", "id": "23546"}, {"kind": "Video", "id": "23548"}, {"kind": "Video", "id": "23550"}, {"kind": "Exercise", "id": "1439947130"}], "children": [{"path": "khan/math/precalculus/partial-fraction-expans/partial-fraction/partial-fraction-expansion-1/", "id": "S-XKGBesRzk", "title": "Partial fraction expansion 1", "kind": "Video", "description": "Introduction to partial fraction expansion", "slug": "partial-fraction-expansion-1"}, {"path": "khan/math/precalculus/partial-fraction-expans/partial-fraction/partial-fraction-expansion-2/", "id": "6FrPLJY0rqM", "title": "Partial fraction expansion 2", "kind": "Video", "description": "A more complex problem", "slug": "partial-fraction-expansion-2"}, {"path": "khan/math/precalculus/partial-fraction-expans/partial-fraction/partial-fraction-expansion-3/", "id": "A52fEdPn9lg", "title": "Partial fraction expansion 3", "kind": "Video", "description": "Dealing with repeated factors", "slug": "partial-fraction-expansion-3"}, {"path": "khan/math/precalculus/partial-fraction-expans/partial-fraction/partial_fraction_expansion_1/", "id": "partial_fraction_expansion_1", "title": "Partial fraction expansion", "description": "Represent a complicated rational fraction as a sum of simpler fractions using partial fraction expansion.", "slug": "partial_fraction_expansion_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "partial-fraction", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/partial-fraction-expans/partial-fraction", "extended_slug": "math/precalculus/partial-fraction-expans/partial-fraction", "kind": "Topic", "slug": "partial-fraction"}], "in_knowledge_map": false, "description": "Learn how to rewrite a complex rational expression as the sum of more simple expressions.", "node_slug": "partial-fraction-expans", "render_type": "Topic", "topic_page_url": "/math/precalculus/partial-fraction-expans", "extended_slug": "math/precalculus/partial-fraction-expans", "kind": "Topic", "slug": "partial-fraction-expans"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/precalculus/limit_topic_precalc/", "id": "limit_topic_precalc", "hide": false, "title": "Limits", "child_data": [{"kind": "Topic", "id": "xbdfbdf4b"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/", "id": "limits_precalc", "hide": false, "title": "Limit basics", "child_data": [{"kind": "Video", "id": "91852634"}, {"kind": "Video", "id": "24080"}, {"kind": "Video", "id": "xe625699f"}, {"kind": "Exercise", "id": "x8c286c43"}, {"kind": "Exercise", "id": "x627716d9"}, {"kind": "Exercise", "id": "x20d7af84"}, {"kind": "Video", "id": "24082"}, {"kind": "Video", "id": "24084"}, {"kind": "Video", "id": "24086"}, {"kind": "Video", "id": "24088"}, {"kind": "Video", "id": "24094"}, {"kind": "Exercise", "id": "x497866be"}, {"kind": "Exercise", "id": "4637496"}], "children": [{"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/introduction-to-limits-hd/", "id": "riXcZT2ICjA", "title": "Introduction to limits", "kind": "Video", "description": "Introduction to limits", "slug": "introduction-to-limits-hd"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/introduction-to-limits/", "id": "W0VWO4asgmk", "title": "Introduction to limits", "kind": "Video", "description": "Introduction to the intuition behind limits", "slug": "introduction-to-limits"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/2-sided-limit-from-graph/", "id": "rccqylTloMs", "title": "Two-sided limit from graph", "kind": "Video", "slug": "2-sided-limit-from-graph"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/two-sided-limits-from-graphs/", "id": "two-sided-limits-from-graphs", "title": "Two-sided limits from graphs", "slug": "two-sided-limits-from-graphs", "kind": "Exercise"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/one-sided-limits-from-graphs/", "id": "one-sided-limits-from-graphs", "title": "One-sided limits from graphs", "slug": "one-sided-limits-from-graphs", "kind": "Exercise"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/finding-limits-numerically/", "id": "finding-limits-numerically", "title": "Finding limits numerically", "description": "Find limits numerically by completing a table of values.", "slug": "finding-limits-numerically", "kind": "Exercise"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/limit-examples-part-1/", "id": "GGQngIp0YGI", "title": "Limit examples (part 1)", "kind": "Video", "description": "Some limit exercises", "slug": "limit-examples-part-1"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/limit-examples-part-2/", "id": "YRw8udexH4o", "title": "Limit examples (part 2)", "kind": "Video", "description": "More limit examples", "slug": "limit-examples-part-2"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/limit-examples-part3/", "id": "gWSDDopD9sk", "title": "Limit examples (part 3)", "kind": "Video", "description": "More limit examples", "slug": "limit-examples-part3"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/limit-examples-w-brain-malfunction-on-first-prob-part-4/", "id": "xjkSE9cPqzo", "title": "Limit examples w/ brain malfunction on first prob (part 4)", "kind": "Video", "description": "3 interesting limit examples (correct answer for problem 1 is 3/16 (6/(4*8) NOT 6/(4+8))", "slug": "limit-examples-w-brain-malfunction-on-first-prob-part-4"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/more-limits/", "id": "rkeU8_4nzKo", "title": "More limits", "kind": "Video", "description": "More limit examples", "slug": "more-limits"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/two-sided-limits-using-algebra/", "id": "two-sided-limits-using-algebra", "title": "Two-sided limits using algebra", "slug": "two-sided-limits-using-algebra", "kind": "Exercise"}, {"path": "khan/math/precalculus/limit_topic_precalc/limits_precalc/limits_2/", "id": "limits_2", "title": "Two-sided limits using advanced algebra", "slug": "limits_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Limits are the core tool that we build upon for calculus. Many times, a function can be undefined at a point, but we can think about what the function \"approaches\" as it gets closer and closer to that point (this is the \"limit\"). Other times, the function may be defined at a point, but it may approach a different limit. There are many, many times where the function value is the same as the limit at a point. Either way, this is a powerful tool as we start thinking about slope of a tangent line to a curve.\n\nIf you have a decent background in algebra (graphing and functions in particular), you'll hopefully enjoy this tutorial!", "node_slug": "limits_precalc", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/limit_topic_precalc/limits_precalc", "extended_slug": "math/precalculus/limit_topic_precalc/limits_precalc", "kind": "Topic", "slug": "limits_precalc"}], "in_knowledge_map": false, "description": "Preview of the calculus topic of limits", "node_slug": "limit_topic_precalc", "render_type": "Topic", "topic_page_url": "/math/precalculus/limit_topic_precalc", "extended_slug": "math/precalculus/limit_topic_precalc", "kind": "Topic", "slug": "limit_topic_precalc"}, {"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/math/precalculus/precalc-miscellaneous/", "id": "precalc-miscellaneous", "hide": false, "title": "Miscellaneous", "child_data": [{"kind": "Topic", "id": "x880e1825"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/math/precalculus/precalc-miscellaneous/precalc-readiness-warmup/", "id": "precalc-readiness-warmup", "hide": false, "title": "Precalculus readiness warmup", "child_data": [{"kind": "Exercise", "id": "xc686d33e"}], "children": [{"path": "khan/math/precalculus/precalc-miscellaneous/precalc-readiness-warmup/precalculus-warmup/", "id": "precalculus-warmup", "title": "Precalculus warmup", "description": "Are you ready to tackle precalculus? Check your understanding of foundational skills with this short quiz.", "slug": "precalculus-warmup", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "precalc-readiness-warmup", "render_type": "Tutorial", "topic_page_url": "/math/precalculus/precalc-miscellaneous/precalc-readiness-warmup", "extended_slug": "math/precalculus/precalc-miscellaneous/precalc-readiness-warmup", "kind": "Topic", "slug": "precalc-readiness-warmup"}], "in_knowledge_map": false, "description": "", "node_slug": "precalc-miscellaneous", "render_type": "Topic", "topic_page_url": "/math/precalculus/precalc-miscellaneous", "extended_slug": "math/precalculus/precalc-miscellaneous", "kind": "Topic", "slug": "precalc-miscellaneous"}], "in_knowledge_map": false, "description": "You may think that precalculus is simply the course you take before calculus. You would be right, of course, but that definition doesn't mean anything unless you have some knowledge of what calculus is. Let's keep it simple, shall we? Calculus is a conceptual framework which provides systematic techniques for solving problems. These problems are appropriately applicable to analytic geometry and algebra. Therefore....precalculus gives you the background for the mathematical concepts, problems, issues and techniques that appear in calculus, including trigonometry, functions, complex numbers, vectors, matrices, and others. There you have it ladies and gentlemen....an introduction to precalculus!", "node_slug": "precalculus", "render_type": "Subject", "topic_page_url": "/math/precalculus", "extended_slug": "math/precalculus", "kind": "Topic", "slug": "precalculus"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/differential-calculus/", "id": "differential-calculus", "hide": false, "title": "Differential calculus", "child_data": [{"kind": "Topic", "id": "xb22c9a5f"}, {"kind": "Topic", "id": "x02f26269"}, {"kind": "Topic", "id": "xcc2c1257"}, {"kind": "Topic", "id": "x92c15682"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/differential-calculus/limits_topic/", "id": "limits_topic", "hide": false, "title": "Limits", "child_data": [{"kind": "Topic", "id": "x6c7fdc99"}, {"kind": "Topic", "id": "x6920bb0d"}, {"kind": "Topic", "id": "xbb7119df"}, {"kind": "Topic", "id": "xe5b8105d"}, {"kind": "Topic", "id": "xe9546e09"}, {"kind": "Topic", "id": "x25b2a1e1"}, {"kind": "Topic", "id": "xe68bd0c8"}, {"kind": "Topic", "id": "x30d739bd"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/limits_topic/limits_tutorial/", "id": "limits_tutorial", "hide": false, "title": "Limits", "child_data": [{"kind": "Video", "id": "91852634"}, {"kind": "Video", "id": "x85083764"}, {"kind": "Video", "id": "x0834d703"}, {"kind": "Exercise", "id": "x20d7af84"}], "children": [{"path": "khan/math/differential-calculus/limits_topic/limits_tutorial/introduction-to-limits-hd/", "id": "riXcZT2ICjA", "title": "Introduction to limits", "kind": "Video", "description": "Introduction to limits", "slug": "introduction-to-limits-hd"}, {"path": "khan/math/differential-calculus/limits_topic/limits_tutorial/limit-by-analyzing-numerical-data/", "id": "XIsPC-f2e2c", "title": "Inferring limit from numerical data", "kind": "Video", "slug": "limit-by-analyzing-numerical-data"}, {"path": "khan/math/differential-calculus/limits_topic/limits_tutorial/numerically-estimating-limit/", "id": "t7NvlTgMsO8", "title": "Estimating limit numerically", "kind": "Video", "slug": "numerically-estimating-limit"}, {"path": "khan/math/differential-calculus/limits_topic/limits_tutorial/finding-limits-numerically/", "id": "finding-limits-numerically", "title": "Finding limits numerically", "description": "Find limits numerically by completing a table of values.", "slug": "finding-limits-numerically", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Limits are the core tool that we build upon for calculus. Many times, a function can be undefined at a point, but we can think about what the function \"approaches\" as it gets closer and closer to that point (this is the \"limit\"). Other times, the function may be defined at a point, but it may approach a different limit. There are many, many times where the function value is the same as the limit at a point. Either way, this is a powerful tool as we start thinking about slope of a tangent line to a curve.\n\nIf you have a decent background in algebra (graphing and functions in particular), you'll hopefully enjoy this tutorial!", "node_slug": "limits_tutorial", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/limits_topic/limits_tutorial", "extended_slug": "math/differential-calculus/limits_topic/limits_tutorial", "kind": "Topic", "slug": "limits_tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/limits_topic/calculus-estimating-limits-graph/", "id": "calculus-estimating-limits-graph", "hide": false, "title": "Estimating limits from graphs", "child_data": [{"kind": "Video", "id": "x0aee8ec3"}, {"kind": "Exercise", "id": "x627716d9"}, {"kind": "Video", "id": "1313337273"}, {"kind": "Video", "id": "1313140631"}, {"kind": "Video", "id": "xe625699f"}, {"kind": "Exercise", "id": "x8c286c43"}], "children": [{"path": "khan/math/differential-calculus/limits_topic/calculus-estimating-limits-graph/one-sided-limits-from-graphs/", "id": "nOnd3SiYZqM", "title": "One-sided limits from graphs", "kind": "Video", "slug": "one-sided-limits-from-graphs"}, {"path": "khan/math/differential-calculus/limits_topic/calculus-estimating-limits-graph/one-sided-limits-from-graphs_1/", "id": "one-sided-limits-from-graphs", "title": "One-sided limits from graphs", "slug": "one-sided-limits-from-graphs_1", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/limits_topic/calculus-estimating-limits-graph/limit-at-a-point-of-discontinuity/", "id": "Y7sqB1e4RBI", "title": "Limit at a point of discontinuity", "kind": "Video", "slug": "limit-at-a-point-of-discontinuity"}, {"path": "khan/math/differential-calculus/limits_topic/calculus-estimating-limits-graph/determining-which-limit-statements-are-true/", "id": "_WOr9-_HbAM", "title": "Determining which limit statements are true", "kind": "Video", "slug": "determining-which-limit-statements-are-true"}, {"path": "khan/math/differential-calculus/limits_topic/calculus-estimating-limits-graph/2-sided-limit-from-graph/", "id": "rccqylTloMs", "title": "Two-sided limit from graph", "kind": "Video", "slug": "2-sided-limit-from-graph"}, {"path": "khan/math/differential-calculus/limits_topic/calculus-estimating-limits-graph/two-sided-limits-from-graphs/", "id": "two-sided-limits-from-graphs", "title": "Two-sided limits from graphs", "slug": "two-sided-limits-from-graphs", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we will build our ability to visualize limits by estimating them based on graphs of functions. We will look at both one-sided and two-sided limits.", "node_slug": "calculus-estimating-limits-graph", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/limits_topic/calculus-estimating-limits-graph", "extended_slug": "math/differential-calculus/limits_topic/calculus-estimating-limits-graph", "kind": "Topic", "slug": "calculus-estimating-limits-graph"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/limits_topic/algebraic-limits/", "id": "algebraic-limits", "hide": false, "title": "Finding limits algebraically", "child_data": [{"kind": "Video", "id": "1313161995"}, {"kind": "Video", "id": "1313230441"}, {"kind": "Exercise", "id": "x497866be"}, {"kind": "Video", "id": "x1cc22e7d"}, {"kind": "Exercise", "id": "4637496"}], "children": [{"path": "khan/math/differential-calculus/limits_topic/algebraic-limits/limit-example-1/", "id": "EAa3J_nDkoI", "title": "Limit example 1", "kind": "Video", "slug": "limit-example-1"}, {"path": "khan/math/differential-calculus/limits_topic/algebraic-limits/limit-properties/", "id": "lSwsAFgWqR8", "title": "Limit properties", "kind": "Video", "slug": "limit-properties"}, {"path": "khan/math/differential-calculus/limits_topic/algebraic-limits/two-sided-limits-using-algebra/", "id": "two-sided-limits-using-algebra", "title": "Two-sided limits using algebra", "slug": "two-sided-limits-using-algebra", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/limits_topic/algebraic-limits/limit-factoring-cubic/", "id": "rU222pVq520", "title": "Limit by factoring cubic expression", "kind": "Video", "slug": "limit-factoring-cubic"}, {"path": "khan/math/differential-calculus/limits_topic/algebraic-limits/limits_2/", "id": "limits_2", "title": "Two-sided limits using advanced algebra", "slug": "limits_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We often attempt to find the limit at a point where the function itself is not defined. In this tutorial, we will use algebra to \"simplify\" functions into ones where it is defined. Given that the original function and the simplified one may be identical except for the limit point in question, this is a useful way of finding limits.", "node_slug": "algebraic-limits", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/limits_topic/algebraic-limits", "extended_slug": "math/differential-calculus/limits_topic/algebraic-limits", "kind": "Topic", "slug": "algebraic-limits"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/limits_topic/continuity-limits/", "id": "continuity-limits", "hide": false, "title": "Continuity using limits", "child_data": [{"kind": "Video", "id": "1315931133"}, {"kind": "Video", "id": "xb27b3893"}, {"kind": "Video", "id": "x0f1bf7aa"}, {"kind": "Video", "id": "xf8a1e5c8"}, {"kind": "Exercise", "id": "xcb51aefa"}], "children": [{"path": "khan/math/differential-calculus/limits_topic/continuity-limits/limits-to-define-continuity/", "id": "kdEQGfeC0SE", "title": "Limits to define continuity", "kind": "Video", "slug": "limits-to-define-continuity"}, {"path": "khan/math/differential-calculus/limits_topic/continuity-limits/limit-and-function-defined-at-point-of-discontinuity/", "id": "_bBAiZhfH_4", "title": "Limit and function defined at point of discontinuity", "kind": "Video", "slug": "limit-and-function-defined-at-point-of-discontinuity"}, {"path": "khan/math/differential-calculus/limits_topic/continuity-limits/fancy-algebra-to-find-a-limit-and-make-a-function-continuous/", "id": "P1DJxuG7U9A", "title": "Fancy algebra to find a limit and make a function continuous", "kind": "Video", "slug": "fancy-algebra-to-find-a-limit-and-make-a-function-continuous"}, {"path": "khan/math/differential-calculus/limits_topic/continuity-limits/defining-a-function-at-a-point-to-make-it-continuous/", "id": "oUgDaEwMbiU", "title": "Defining a function at a point to make it continuous", "kind": "Video", "slug": "defining-a-function-at-a-point-to-make-it-continuous"}, {"path": "khan/math/differential-calculus/limits_topic/continuity-limits/continuity/", "id": "continuity", "title": "Continuity", "slug": "continuity", "kind": "Exercise"}], "in_knowledge_map": false, "description": "A function isn't continuous when there is a \"break\" in its graph. This tutorial uses limits to define this idea more formally and gives practice thinking about continuity (and discontinuity) in terms of limits.", "node_slug": "continuity-limits", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/limits_topic/continuity-limits", "extended_slug": "math/differential-calculus/limits_topic/continuity-limits", "kind": "Topic", "slug": "continuity-limits"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/", "id": "old-limits-tutorial", "hide": false, "title": "Old limits tutorial", "child_data": [{"kind": "Video", "id": "24080"}, {"kind": "Video", "id": "24082"}, {"kind": "Video", "id": "24084"}, {"kind": "Video", "id": "24086"}, {"kind": "Video", "id": "24088"}, {"kind": "Video", "id": "24094"}], "children": [{"path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/introduction-to-limits/", "id": "W0VWO4asgmk", "title": "Introduction to limits", "kind": "Video", "description": "Introduction to the intuition behind limits", "slug": "introduction-to-limits"}, {"path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/limit-examples-part-1/", "id": "GGQngIp0YGI", "title": "Limit examples (part 1)", "kind": "Video", "description": "Some limit exercises", "slug": "limit-examples-part-1"}, {"path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/limit-examples-part-2/", "id": "YRw8udexH4o", "title": "Limit examples (part 2)", "kind": "Video", "description": "More limit examples", "slug": "limit-examples-part-2"}, {"path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/limit-examples-part3/", "id": "gWSDDopD9sk", "title": "Limit examples (part 3)", "kind": "Video", "description": "More limit examples", "slug": "limit-examples-part3"}, {"path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/limit-examples-w-brain-malfunction-on-first-prob-part-4/", "id": "xjkSE9cPqzo", "title": "Limit examples w/ brain malfunction on first prob (part 4)", "kind": "Video", "description": "3 interesting limit examples (correct answer for problem 1 is 3/16 (6/(4*8) NOT 6/(4+8))", "slug": "limit-examples-w-brain-malfunction-on-first-prob-part-4"}, {"path": "khan/math/differential-calculus/limits_topic/old-limits-tutorial/more-limits/", "id": "rkeU8_4nzKo", "title": "More limits", "kind": "Video", "description": "More limit examples", "slug": "more-limits"}], "in_knowledge_map": false, "description": "This tutorial covers much of the same material as the \"Limits\" tutorial, but does it with Sal's original \"old school\" videos. The sound, resolution or handwriting isn't as good, but some people find them more charming.", "node_slug": "old-limits-tutorial", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/limits_topic/old-limits-tutorial", "extended_slug": "math/differential-calculus/limits_topic/old-limits-tutorial", "kind": "Topic", "slug": "old-limits-tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/limits_topic/limits-infinity/", "id": "limits-infinity", "hide": false, "title": "Limits and infinity", "child_data": [{"kind": "Video", "id": "1313399619"}, {"kind": "Video", "id": "xbd675271"}, {"kind": "Video", "id": "x3619e094"}, {"kind": "Exercise", "id": "x184d6583"}, {"kind": "Video", "id": "1313454812"}, {"kind": "Video", "id": "1313658038"}, {"kind": "Video", "id": "1315254826"}, {"kind": "Video", "id": "xb85faf80"}, {"kind": "Exercise", "id": "xf5f63aa1"}], "children": [{"path": "khan/math/differential-calculus/limits_topic/limits-infinity/limits-and-infinity/", "id": "a2Ia_ZlUCaQ", "title": "Limits and infinity", "kind": "Video", "slug": "limits-and-infinity"}, {"path": "khan/math/differential-calculus/limits_topic/limits-infinity/vertical-asymptote-natural-log/", "id": "78tnNYNISOc", "title": "Vertical asymptote of natural log", "kind": "Video", "slug": "vertical-asymptote-natural-log"}, {"path": "khan/math/differential-calculus/limits_topic/limits-infinity/visual-vertical-asymptotes/", "id": "SUrlTlI-oxI", "title": "Visually determining vertical asymptotes", "kind": "Video", "slug": "visual-vertical-asymptotes"}, {"path": "khan/math/differential-calculus/limits_topic/limits-infinity/limits-at-infinity-where-f-x-is-unbounded/", "id": "limits-at-infinity-where-f-x--is-unbounded", "title": "Limits at infinity where f(x) is unbounded", "slug": "limits-at-infinity-where-f-x-is-unbounded", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/limits_topic/limits-infinity/limits-at-positive-and-negative-infinity/", "id": "gv9ogppphso", "title": "Limits at positive and negative infinity", "kind": "Video", "slug": "limits-at-positive-and-negative-infinity"}, {"path": "khan/math/differential-calculus/limits_topic/limits-infinity/more-limits-at-infinity/", "id": "KcqO1fX9b_I", "title": "More limits at infinity", "kind": "Video", "slug": "more-limits-at-infinity"}, {"path": "khan/math/differential-calculus/limits_topic/limits-infinity/limits-with-two-horizontal-asymptotes/", "id": "xks4cETlN58", "title": "Limits with two horizontal asymptotes", "kind": "Video", "slug": "limits-with-two-horizontal-asymptotes"}, {"path": "khan/math/differential-calculus/limits_topic/limits-infinity/limits-infinity-algebra/", "id": "nDXFgexOM5c", "title": "Limits at infinity using algebra", "kind": "Video", "slug": "limits-infinity-algebra"}, {"path": "khan/math/differential-calculus/limits_topic/limits-infinity/limits-at-infinity-where-x-is-unbounded/", "id": "limits-at-infinity-where-x-is-unbounded", "title": "Limits at infinity where x is unbounded", "slug": "limits-at-infinity-where-x-is-unbounded", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You have a basic understanding of what a limit is. Now, in this tutorial, we can explore situation where we take the limit as x approaches negative or positive infinity (and situations where the limit itself could be unbounded).", "node_slug": "limits-infinity", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/limits_topic/limits-infinity", "extended_slug": "math/differential-calculus/limits_topic/limits-infinity", "kind": "Topic", "slug": "limits-infinity"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/limits_topic/squeeze_theorem/", "id": "squeeze_theorem", "hide": false, "title": "Squeeze theorem", "child_data": [{"kind": "Video", "id": "x1006b0c1"}, {"kind": "Video", "id": "x5d0b4fb1"}, {"kind": "Exercise", "id": "x1d54affb"}, {"kind": "Video", "id": "24090"}, {"kind": "Video", "id": "24092"}], "children": [{"path": "khan/math/differential-calculus/limits_topic/squeeze_theorem/squeeze-sandwich-theorem/", "id": "WvxKwRcHGHg", "title": "Squeeze theorem or sandwich theorem", "kind": "Video", "slug": "squeeze-sandwich-theorem"}, {"path": "khan/math/differential-calculus/limits_topic/squeeze_theorem/squeeze-theorem-exercise-example/", "id": "2XQH-J5KeHI", "title": "Squeeze theorem exercise example", "kind": "Video", "slug": "squeeze-theorem-exercise-example"}, {"path": "khan/math/differential-calculus/limits_topic/squeeze_theorem/squeeze-theorem_1/", "id": "squeeze-theorem", "title": "Squeeze theorem", "slug": "squeeze-theorem_1", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/limits_topic/squeeze_theorem/squeeze-theorem/", "id": "igJdDN-DPgA", "title": "Squeeze theorem (sandwich theorem)", "kind": "Video", "description": "Intuition (but not a proof) of the Squeeze Theorem.", "slug": "squeeze-theorem"}, {"path": "khan/math/differential-calculus/limits_topic/squeeze_theorem/proof-lim-sin-x-x/", "id": "Ve99biD1KtA", "title": "Proof: lim (sin x)/x", "kind": "Video", "description": "Using the squeeze theorem to prove that the limit as x approaches 0 of (sin x)/x =1", "slug": "proof-lim-sin-x-x"}], "in_knowledge_map": false, "description": "If a function is always smaller than one function and always greater than another (i.e. it is always between them), then if the upper and lower function converge to a limit at a point, then so does the one in between. Not only is this useful for proving certain tricky limits (we use it to prove lim (x \u2192 0) of (sin x)/x, but it is a useful metaphor to use in life (seriously). :)\n\nThis tutorial is useful but optional. It is covered in most calculus courses, but it is not necessary to progress on to the \"Introduction to derivatives\" tutorial.", "node_slug": "squeeze_theorem", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/limits_topic/squeeze_theorem", "extended_slug": "math/differential-calculus/limits_topic/squeeze_theorem", "kind": "Topic", "slug": "squeeze_theorem"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-calculus/limits_topic/epsilon_delta/", "id": "epsilon_delta", "hide": false, "title": "Epsilon delta definition of limits", "child_data": [{"kind": "Video", "id": "1312376615"}, {"kind": "Video", "id": "1312579492"}, {"kind": "Video", "id": "1312571391"}, {"kind": "Video", "id": "1312638166"}, {"kind": "Separator", "id": "_separator"}, {"kind": "Video", "id": "24096"}, {"kind": "Video", "id": "24098"}], "children": [{"path": "khan/math/differential-calculus/limits_topic/epsilon_delta/limit-intuition-review/", "id": "5i8HLmVTcRQ", "title": "Limit intuition review", "kind": "Video", "slug": "limit-intuition-review"}, {"path": "khan/math/differential-calculus/limits_topic/epsilon_delta/building-the-idea-of-epsilon-delta-definition/", "id": "ljzn4SADuZc", "title": "Building the idea of epsilon-delta definition", "kind": "Video", "slug": "building-the-idea-of-epsilon-delta-definition"}, {"path": "khan/math/differential-calculus/limits_topic/epsilon_delta/epsilon-delta-definition-of-limits/", "id": "w70af5Ou70M", "title": "Epsilon-delta definition of limits", "kind": "Video", "slug": "epsilon-delta-definition-of-limits"}, {"path": "khan/math/differential-calculus/limits_topic/epsilon_delta/proving-a-limit-using-epsilon-delta-definition/", "id": "0sCttufU-jQ", "title": "Proving a limit using epsilon-delta definition", "kind": "Video", "slug": "proving-a-limit-using-epsilon-delta-definition"}, {"path": "khan/math/differential-calculus/limits_topic/epsilon_delta/epsilon-delta-limit-definition-1/", "id": "-ejyeII0i5c", "title": "Epsilon-delta limit definition 1", "kind": "Video", "description": "Introduction to the Epsilon Delta Definition of a Limit.", "slug": "epsilon-delta-limit-definition-1"}, {"path": "khan/math/differential-calculus/limits_topic/epsilon_delta/epsilon-delta-limit-definition-2/", "id": "Fdu5-aNJTzU", "title": "Epsilon-delta limit definition 2", "kind": "Video", "description": "Using the epsilon delta definition to prove a limit", "slug": "epsilon-delta-limit-definition-2"}], "in_knowledge_map": false, "description": "This tutorial introduces a \"formal\" definition of limits. So put on your ball gown and/or tuxedo to party with Mr. Epsilon Delta (no, this is not referring to a fraternity).\n\nThis tends to be covered early in a traditional calculus class (right after basic limits), but we have mixed feelings about that. It is cool and rigorous, but also very \"mathy\" (as most rigorous things are). Don't fret if you have trouble with it the first time. If you have a basic conceptual understanding of what limits are (from the \"Limits\" tutorial), you're ready to start thinking about taking derivatives.", "node_slug": "epsilon_delta", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/limits_topic/epsilon_delta", "extended_slug": "math/differential-calculus/limits_topic/epsilon_delta", "kind": "Topic", "slug": "epsilon_delta"}], "in_knowledge_map": false, "description": "Limit introduction, squeeze theorem, and epsilon-delta definition of limits", "node_slug": "limits_topic", "render_type": "Topic", "topic_page_url": "/math/differential-calculus/limits_topic", "extended_slug": "math/differential-calculus/limits_topic", "kind": "Topic", "slug": "limits_topic"}, {"icon_src": "/images/power-mode/badges/differential-calculus-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/differential-calculus/taking-derivatives/", "id": "taking-derivatives", "hide": false, "title": "Taking derivatives", "child_data": [{"kind": "Topic", "id": "x9a08f88a"}, {"kind": "Topic", "id": "x9d8fe7af"}, {"kind": "Topic", "id": "xccc0e764"}, {"kind": "Topic", "id": "x830b81ea"}, {"kind": "Topic", "id": "x7dcf02b9"}, {"kind": "Topic", "id": "x8e56468a"}, {"kind": "Topic", "id": "xbc84f7d2"}, {"kind": "Topic", "id": "xeb7a554e"}, {"kind": "Topic", "id": "xb76e02b5"}, {"kind": "Topic", "id": "xa74bc799"}, {"kind": "Topic", "id": "xdcf7bf81"}, {"kind": "Topic", "id": "x9468e656"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-calculus/taking-derivatives/intro_differential_calc/", "id": "intro_differential_calc", "hide": false, "title": "Introduction to differential calculus", "child_data": [{"kind": "Video", "id": "581541547"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/intro_differential_calc/newton-leibniz-and-usain-bolt/", "id": "EKvHQc3QEow", "title": "Newton, Leibniz, and Usain Bolt", "kind": "Video", "description": "Why we study differential calculus", "slug": "newton-leibniz-and-usain-bolt"}], "in_knowledge_map": false, "description": "The topic that is now known as \"calculus\" was really called \"the calculus of differentials\" when first devised by Newton (and Leibniz) roughly four hundred years ago. To Newton, differentials were infinitely small \"changes\" in numbers that previous mathematics didn't know what to do with. Think this has no relevence to you? Well how would you figure out how fast something is going *right* at this moment (you'd have to figure out the very, very small change in distance over an infinitely small change in time)? This tutorial gives a gentle introduction to the world of Newton and Leibniz.", "node_slug": "intro_differential_calc", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/intro_differential_calc", "extended_slug": "math/differential-calculus/taking-derivatives/intro_differential_calc", "kind": "Topic", "slug": "intro_differential_calc"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/", "id": "secant-line-slope-tangent", "hide": false, "title": "Using secant line slopes to approximate tangent slope", "child_data": [{"kind": "Video", "id": "xed57a1a5"}, {"kind": "Video", "id": "xdb7e3de5"}, {"kind": "Video", "id": "xc6f5c1ed"}, {"kind": "Video", "id": "xec2af377"}, {"kind": "Video", "id": "x49e1b9bd"}, {"kind": "Video", "id": "xd02b4163"}, {"kind": "Exercise", "id": "x8dea5966"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/slope-of-a-line-secant-to-a-curve/", "id": "8r8Vp_1iB4k", "title": "Slope of a line secant to a curve", "kind": "Video", "slug": "slope-of-a-line-secant-to-a-curve"}, {"path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/slope-of-a-secant-line/", "id": "0zExhHh7_Ic", "title": "Slope of a secant line example 1", "kind": "Video", "slug": "slope-of-a-secant-line"}, {"path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/slopes-of-secant-lines/", "id": "XdsifNBa9kk", "title": "Slope of a secant line example 2", "kind": "Video", "slug": "slopes-of-secant-lines"}, {"path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/slope-of-a-secant-line-example-3/", "id": "H6ZNLD1AeM8", "title": "Slope of a secant line example 3", "kind": "Video", "slug": "slope-of-a-secant-line-example-3"}, {"path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/approximating-instantaneous-rate-of-change-word-problem-1/", "id": "fI6w2kL295Y", "title": "Approximating instantaneous rate of change word problem", "kind": "Video", "slug": "approximating-instantaneous-rate-of-change-word-problem-1"}, {"path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/approximating-equation-of-tangent-line-word-problem-1/", "id": "2oHUkHYtQoM", "title": "Approximating equation of tangent line word problem", "kind": "Video", "slug": "approximating-equation-of-tangent-line-word-problem-1"}, {"path": "khan/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/slope-of-secant-lines/", "id": "slope-of-secant-lines", "title": "Slope of secant lines", "slug": "slope-of-secant-lines", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The idea of slope is fairly straightforward-- (change in vertical) over (change in horizontal). But how do we measure this if the (change in horizontal) is zero (which would be the case when finding the slope of the tangent line. In this tutorial, we'll approximate this by finding the slopes of secant lines.", "node_slug": "secant-line-slope-tangent", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/secant-line-slope-tangent", "extended_slug": "math/differential-calculus/taking-derivatives/secant-line-slope-tangent", "kind": "Topic", "slug": "secant-line-slope-tangent"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/", "id": "derivative_intro", "hide": false, "title": "Introduction to derivatives", "child_data": [{"kind": "Video", "id": "24100"}, {"kind": "Video", "id": "xf4f3ffcd"}, {"kind": "Video", "id": "xf9828bdf"}, {"kind": "Video", "id": "x22e79f7d"}, {"kind": "Exercise", "id": "x04bafc1d"}, {"kind": "Video", "id": "24102"}, {"kind": "Video", "id": "24104"}, {"kind": "Video", "id": "x2c6e38f4"}, {"kind": "Video", "id": "x86a51654"}, {"kind": "Video", "id": "x04bbe3f0"}, {"kind": "Exercise", "id": "x6056e694"}, {"kind": "Separator", "id": "_separator"}, {"kind": "Video", "id": "24106"}, {"kind": "Video", "id": "24108"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/calculus-derivatives-1-new-hd-version/", "id": "ANyVpMS3HL4", "title": "Derivative as slope of a tangent line", "kind": "Video", "description": "Understanding that the derivative is just the slope of a curve at a point (or the slope of the tangent line)", "slug": "calculus-derivatives-1-new-hd-version"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/tangent-slope-as-limiting-value-of-secant-slope-example-1/", "id": "nGCW5teACC0", "title": "Tangent slope as limiting value of secant slope example 1", "kind": "Video", "slug": "tangent-slope-as-limiting-value-of-secant-slope-example-1"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/tangent-slope-as-limiting-value-of-secant-slope-example-2/", "id": "H5eIE7zdnvI", "title": "Tangent slope as limiting value of secant slope example 2", "kind": "Video", "slug": "tangent-slope-as-limiting-value-of-secant-slope-example-2"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/tangent-slope-as-limiting-value-of-secant-slope-example-3/", "id": "hoRISaqp1Po", "title": "Tangent slope as limiting value of secant slope example 3", "kind": "Video", "slug": "tangent-slope-as-limiting-value-of-secant-slope-example-3"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/tangent-slope-is-limiting-value-of-secant-slope/", "id": "tangent-slope-is-limiting-value-of-secant-slope", "title": "Tangent slope is limiting value of secant slope", "slug": "tangent-slope-is-limiting-value-of-secant-slope", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/calculus-derivatives-2-new-hd-version/", "id": "IePCHjMeFkE", "title": "Calculating slope of tangent line using derivative definition", "kind": "Video", "description": "Calculus-Derivative: Finding the slope (or derivative) of a curve at a particular point.", "slug": "calculus-derivatives-2-new-hd-version"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/calculus-derivatives-2-5-new-hd-version/", "id": "HEH_oKNLgUU", "title": "The derivative of f(x)=x^2 for any x", "kind": "Video", "description": "Calculus-Derivative: Finding the derivative of y=x^2", "slug": "calculus-derivatives-2-5-new-hd-version"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/alternate-form-of-the-derivative/", "id": "Df2escG-Vu0", "title": "Formal and alternate form of the derivative", "kind": "Video", "slug": "alternate-form-of-the-derivative"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/formal-and-alternate-form-of-the-derivative-for-ln-x/", "id": "m8yC7kR5Fuk", "title": "Formal and alternate form of the derivative for ln x", "kind": "Video", "slug": "formal-and-alternate-form-of-the-derivative-for-ln-x"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/formal-and-alternate-form-of-the-derivative-example-1/", "id": "ePh8iCbcXfA", "title": "Formal and alternate form of the derivative example 1", "kind": "Video", "slug": "formal-and-alternate-form-of-the-derivative-example-1"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/the-formal-and-alternate-form-of-the-derivative/", "id": "the-formal-and-alternate-form-of-the-derivative", "title": "The formal and alternate form of the derivative", "slug": "the-formal-and-alternate-form-of-the-derivative", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/calculus-derivatives-1/", "id": "rAof9Ld5sOg", "title": "Calculus: Derivatives 1", "kind": "Video", "description": "Finding the slope of a tangent line to a curve (the derivative). Introduction to Calculus.", "slug": "calculus-derivatives-1"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative_intro/calculus-derivatives-2/", "id": "ay8838UZ4nM", "title": "Calculus: Derivatives 2", "kind": "Video", "description": "More intuition of what a derivative is. Using the derivative to find the slope at any point along f(x)=x^2", "slug": "calculus-derivatives-2"}], "in_knowledge_map": false, "description": "Discover what magic we can derive when we take a derivative, which is the slope of the tangent line at any point on a curve.", "node_slug": "derivative_intro", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/derivative_intro", "extended_slug": "math/differential-calculus/taking-derivatives/derivative_intro", "kind": "Topic", "slug": "derivative_intro"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/", "id": "visualizing-derivatives-tutorial", "hide": false, "title": "Visualizing graphs of functions and their derivatives", "child_data": [{"kind": "Video", "id": "326399715"}, {"kind": "Exercise", "id": "261804192"}, {"kind": "Video", "id": "x4da008e5"}, {"kind": "Exercise", "id": "1425282221"}, {"kind": "Video", "id": "x31dde586"}, {"kind": "Video", "id": "xf0226494"}, {"kind": "Video", "id": "x3262ea6a"}, {"kind": "Video", "id": "xed8375f0"}, {"kind": "Exercise", "id": "x2dafcbfc"}, {"kind": "Video", "id": "1315214647"}, {"kind": "Video", "id": "1314533852"}, {"kind": "Video", "id": "1312099958"}, {"kind": "Exercise", "id": "1283391050"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/derivative-intuition-module/", "id": "HtvikVD9aa0", "title": "Derivative intuition module", "kind": "Video", "description": "Sal walking through the derivative intuition module made by Ben Eater", "slug": "derivative-intuition-module"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/derivative_intuition/", "id": "derivative_intuition", "title": "Derivative intuition", "slug": "derivative_intuition", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/interpreting-slope-of-a-curve-exercise/", "id": "CpDfay5NeCg", "title": "Interpreting slope of a curve exercise", "kind": "Video", "slug": "interpreting-slope-of-a-curve-exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/recognizing_slope/", "id": "recognizing_slope", "title": "Recognizing slope of curves", "description": "Identify intervals with positive and negative slope on graphs of functions", "slug": "recognizing_slope", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/graphs-of-functions-and-their-derivatives-example-1/", "id": "P3IlneCNm8A", "title": "Graphs of functions and their derivatives example 1", "kind": "Video", "slug": "graphs-of-functions-and-their-derivatives-example-1"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/where-a-function-is-not-differentiable/", "id": "pj1VvscsV0s", "title": "Where a function is not differentiable", "kind": "Video", "slug": "where-a-function-is-not-differentiable"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/identifying-a-function-s-derivative-example/", "id": "NFzma7NsHtI", "title": "Identifying a function's derivative example", "kind": "Video", "slug": "identifying-a-function-s-derivative-example"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/figuring-out-which-function-is-the-the-derivative/", "id": "PF6_y4zYVec", "title": "Figuring out which function is the derivative", "kind": "Video", "slug": "figuring-out-which-function-is-the-the-derivative"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/graphs-of-functions-and-their-derivatives/", "id": "graphs-of-functions-and-their-derivatives", "title": "Graphs of functions and their derivatives", "slug": "graphs-of-functions-and-their-derivatives", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/intuitively-drawing-the-derivative-of-a-function/", "id": "eVme7kuGyuo", "title": "Intuitively drawing the derivative of a function", "kind": "Video", "slug": "intuitively-drawing-the-derivative-of-a-function"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/intuitively-drawing-the-anitderivative-of-a-function/", "id": "61ecnr8m04U", "title": "Intuitively drawing the antiderivative of a function", "kind": "Video", "slug": "intuitively-drawing-the-anitderivative-of-a-function"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/visualizing-derivatives-exercise/", "id": "EeIXVN1zUeM", "title": "Visualizing derivatives exercise", "kind": "Video", "description": "Exercise available at https://www.khanacademy.org/math/calculus/differential-calculus/derivative_intro/e/visualizing_derivatives\n\nExercise made by Stephanie Chang", "slug": "visualizing-derivatives-exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial/visualizing_derivatives/", "id": "visualizing_derivatives", "title": "Visualizing derivatives", "slug": "visualizing_derivatives", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You understand that a derivative can be viewed as the slope of the tangent line at a point or the instantaneous rate of change of a function with respect to x. This tutorial will deepen your ability to visualize and conceptualize derivatives through videos and exercises.\n\nWe think you'll find this tutorial incredibly fun and satisfying (seriously).", "node_slug": "visualizing-derivatives-tutorial", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial", "extended_slug": "math/differential-calculus/taking-derivatives/visualizing-derivatives-tutorial", "kind": "Topic", "slug": "visualizing-derivatives-tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/taking-derivatives/derivative-properties/", "id": "derivative-properties", "hide": false, "title": "Derivative properties and intuition", "child_data": [{"kind": "Video", "id": "x6d547a43"}, {"kind": "Exercise", "id": "x7743c6d5"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/derivative-properties/derivative-properties-example/", "id": "rOftmuhGLjY", "title": "Using derivative properties", "kind": "Video", "slug": "derivative-properties-example"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivative-properties/symbolic-differentiation/", "id": "symbolic-differentiation", "title": "Symbolic differentiation", "slug": "symbolic-differentiation", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's now get a better understanding of the different derivative-related notations and use them to better understand properties of derivatives.", "node_slug": "derivative-properties", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/derivative-properties", "extended_slug": "math/differential-calculus/taking-derivatives/derivative-properties", "kind": "Topic", "slug": "derivative-properties"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/taking-derivatives/power_rule_tutorial/", "id": "power_rule_tutorial", "hide": false, "title": "Power rule", "child_data": [{"kind": "Video", "id": "1280002940"}, {"kind": "Video", "id": "1280226135"}, {"kind": "Video", "id": "1280224216"}, {"kind": "Exercise", "id": "x20325c93"}, {"kind": "Exercise", "id": "4745921"}, {"kind": "Video", "id": "24124"}, {"kind": "Video", "id": "24126"}, {"kind": "Separator", "id": "_separator"}, {"kind": "Video", "id": "24110"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/power_rule_tutorial/power-rule/", "id": "bRZmfc1YFsQ", "title": "Power rule", "kind": "Video", "slug": "power-rule"}, {"path": "khan/math/differential-calculus/taking-derivatives/power_rule_tutorial/is-the-power-rule-reasonable/", "id": "BYTfCnR9Sl0", "title": "Is the power rule reasonable", "kind": "Video", "slug": "is-the-power-rule-reasonable"}, {"path": "khan/math/differential-calculus/taking-derivatives/power_rule_tutorial/derivative-properties-and-polynomial-derivatives/", "id": "mzOBlH32qdk", "title": "Derivative properties and polynomial derivatives", "kind": "Video", "slug": "derivative-properties-and-polynomial-derivatives"}, {"path": "khan/math/differential-calculus/taking-derivatives/power_rule_tutorial/power-rule-basic/", "id": "power-rule-basic", "title": "Power rule (basic)", "description": "Get started using the power rule for derivatives!", "slug": "power-rule-basic", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/power_rule_tutorial/power_rule/", "id": "power_rule", "title": "Power rule (advanced)", "slug": "power_rule", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/power_rule_tutorial/proof-d-dx-x-n/", "id": "dZnc3PtNaN4", "title": "Proof: d/dx(x^n)", "kind": "Video", "description": "Proof that d/dx(x^n) = n*x^(n-1)", "slug": "proof-d-dx-x-n"}, {"path": "khan/math/differential-calculus/taking-derivatives/power_rule_tutorial/proof-d-dx-sqrt-x/", "id": "789aMeepbxI", "title": "Proof: d/dx(sqrt(x))", "kind": "Video", "description": "Proof that d/dx (x^.5) = .5x^(-.5)", "slug": "proof-d-dx-sqrt-x"}, {"path": "khan/math/differential-calculus/taking-derivatives/power_rule_tutorial/calculus-derivatives-3/", "id": "z1lwai-lIzY", "title": "Power rule introduction (old)", "kind": "Video", "description": "Determining the derivatives of simple polynomials.", "slug": "calculus-derivatives-3"}], "in_knowledge_map": false, "description": "Calculus is about to seem strangely straight forward. You've spent some time using the definition of a derivative to find the slope at a point. In this tutorial, we'll derive and apply the derivative for any term in a polynomial.\n\nBy the end of this tutorial, you'll have the power to take the derivative of any polynomial like it's second nature!", "node_slug": "power_rule_tutorial", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/power_rule_tutorial", "extended_slug": "math/differential-calculus/taking-derivatives/power_rule_tutorial", "kind": "Topic", "slug": "power_rule_tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/taking-derivatives/chain_rule/", "id": "chain_rule", "hide": false, "title": "Chain rule", "child_data": [{"kind": "Video", "id": "1326857818"}, {"kind": "Exercise", "id": "x47e64435"}, {"kind": "Exercise", "id": "4732916"}, {"kind": "Video", "id": "1332165556"}, {"kind": "Video", "id": "1331367901"}, {"kind": "Video", "id": "1335652068"}, {"kind": "Video", "id": "1335611225"}, {"kind": "Video", "id": "xa3f6ecdf"}, {"kind": "Video", "id": "x8602b348"}, {"kind": "Exercise", "id": "4736894"}, {"kind": "Video", "id": "1332001812"}, {"kind": "Video", "id": "xd75dff18"}, {"kind": "Exercise", "id": "xba0d50c1"}, {"kind": "Separator", "id": "_separator"}, {"kind": "Video", "id": "24136"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/derivatives-of-sin-x-cos-x-tan-x-e-x-and-ln-x/", "id": "TDHI-aieyfk", "title": "Derivatives of sin x, cos x, tan x, e^x and ln x", "kind": "Video", "slug": "derivatives-of-sin-x-cos-x-tan-x-e-x-and-ln-x"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/special-derivatives-quiz/", "id": "special-derivatives-quiz", "title": "Special derivatives quiz", "description": "See if you remember the five derivatives from the previous video.", "slug": "special-derivatives-quiz", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/special_derivatives/", "id": "special_derivatives", "title": "Special derivatives", "slug": "special_derivatives", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-introduction/", "id": "MKWBx78L7Qg", "title": "Chain rule introduction", "kind": "Video", "slug": "chain-rule-introduction"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-definition-and-example/", "id": "IiBC4ngwH6E", "title": "Chain rule definition and example", "kind": "Video", "slug": "chain-rule-definition-and-example"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-for-derivative-of-2-x/", "id": "Mci8Cuik_Gw", "title": "Chain rule for derivative of 2^x", "kind": "Video", "slug": "chain-rule-for-derivative-of-2-x"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/derivative-of-log-with-arbitrary-base/", "id": "ssz6TElXEOM", "title": "Derivative of log with arbitrary base", "kind": "Video", "slug": "derivative-of-log-with-arbitrary-base"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-on-two-functions-example-1/", "id": "Zr72qWNMk7E", "title": "Chain rule example using visual function definitions", "kind": "Video", "slug": "chain-rule-on-two-functions-example-1"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-on-two-functions-example-2/", "id": "eJxSDYO82c4", "title": "Chain rule example using visual information", "kind": "Video", "slug": "chain-rule-on-two-functions-example-2"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain_rule_1/", "id": "chain_rule_1", "title": "Chain rule on two functions", "slug": "chain_rule_1", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-with-triple-composition/", "id": "1015d63VKh4", "title": "Chain rule with triple composition", "kind": "Video", "slug": "chain-rule-with-triple-composition"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-visual-triple-comp/", "id": "pSSqUF_mmtM", "title": "Derivative of triple composition", "kind": "Video", "slug": "chain-rule-visual-triple-comp"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/chain-rule-on-three-functions/", "id": "chain-rule-on-three-functions", "title": "Chain rule on three functions", "slug": "chain-rule-on-three-functions", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/chain_rule/extreme-derivative-word-problem-advanced/", "id": "viaPc8zDcRI", "title": "Extreme derivative word problem (advanced)", "kind": "Video", "description": "A difficult but interesting derivative word problem", "slug": "extreme-derivative-word-problem-advanced"}], "in_knowledge_map": false, "description": "You can take the derivatives of f(x) and g(x), but what about f(g(x)) or g(f(x))? The chain rule gives us this ability. Because most complex and hairy functions can be thought of the composition of several simpler ones (ones that you can find derivatives of), you'll be able to take the derivative of almost any function after this tutorial. Just imagine.", "node_slug": "chain_rule", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/chain_rule", "extended_slug": "math/differential-calculus/taking-derivatives/chain_rule", "kind": "Topic", "slug": "chain_rule"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-calculus/taking-derivatives/proving-the-chain-rule/", "id": "proving-the-chain-rule", "hide": false, "title": "Proving the chain rule", "child_data": [{"kind": "Video", "id": "x428a8acc"}, {"kind": "Video", "id": "xdadf5f63"}, {"kind": "Video", "id": "xb6e914af"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/proving-the-chain-rule/differentiability-implies-continuity/", "id": "eytyVWA5ZQs", "title": "Differentiability implies continuity", "kind": "Video", "description": "Differentiability implies continuity", "slug": "differentiability-implies-continuity"}, {"path": "khan/math/differential-calculus/taking-derivatives/proving-the-chain-rule/change-in-continuous-function-approaches-0/", "id": "l6T4RhlgkG0", "title": "Change in continuous function approaches 0", "kind": "Video", "description": "Change in continuous function approaches 0", "slug": "change-in-continuous-function-approaches-0"}, {"path": "khan/math/differential-calculus/taking-derivatives/proving-the-chain-rule/chain-rule-proof/", "id": "FKraGDm2fUY", "title": "Chain rule proof", "kind": "Video", "description": "Chain rule proof", "slug": "chain-rule-proof"}], "in_knowledge_map": false, "description": "We've already been using the chain rule, but let's take a moment to really convince ourselves that it'll always work. It's not necessary to watch these videos before moving on, but if you have the time, they'll help to deepen your understanding of derivatives, continuity, and the chain rule.", "node_slug": "proving-the-chain-rule", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/proving-the-chain-rule", "extended_slug": "math/differential-calculus/taking-derivatives/proving-the-chain-rule", "kind": "Topic", "slug": "proving-the-chain-rule"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/taking-derivatives/product_rule/", "id": "product_rule", "hide": false, "title": "Product and quotient rules", "child_data": [{"kind": "Video", "id": "1326857818"}, {"kind": "Exercise", "id": "x47e64435"}, {"kind": "Exercise", "id": "4732916"}, {"kind": "Video", "id": "1332054864"}, {"kind": "Video", "id": "1335339467"}, {"kind": "Exercise", "id": "4997089"}, {"kind": "Video", "id": "1332076874"}, {"kind": "Video", "id": "1332211179"}, {"kind": "Exercise", "id": "47867526"}, {"kind": "Video", "id": "1334798762"}, {"kind": "Exercise", "id": "x01c6d7ae"}, {"kind": "Video", "id": "xd4dbda2d"}, {"kind": "Separator", "id": "_separator"}, {"kind": "Video", "id": "24118"}, {"kind": "Video", "id": "24120"}, {"kind": "Video", "id": "24172"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/product_rule/derivatives-of-sin-x-cos-x-tan-x-e-x-and-ln-x/", "id": "TDHI-aieyfk", "title": "Derivatives of sin x, cos x, tan x, e^x and ln x", "kind": "Video", "slug": "derivatives-of-sin-x-cos-x-tan-x-e-x-and-ln-x"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/special-derivatives-quiz/", "id": "special-derivatives-quiz", "title": "Special derivatives quiz", "description": "See if you remember the five derivatives from the previous video.", "slug": "special-derivatives-quiz", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/special_derivatives/", "id": "special_derivatives", "title": "Special derivatives", "slug": "special_derivatives", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/applying-the-product-rule-for-derivatives/", "id": "79ngr0Bur38", "title": "The product rule for derivatives", "kind": "Video", "slug": "applying-the-product-rule-for-derivatives"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/product-rule-for-more-than-two-functions/", "id": "Bkkk0RLSEy8", "title": "Product rule for more than two functions", "kind": "Video", "slug": "product-rule-for-more-than-two-functions"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/product_rule/", "id": "product_rule", "title": "Product rule", "slug": "product_rule", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/quotient-rule-from-product-rule/", "id": "ho87DN9wO70", "title": "Quotient rule from product rule", "kind": "Video", "slug": "quotient-rule-from-product-rule"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/quotient-rule-for-derivative-of-tan-x/", "id": "eJUGoAtF-7A", "title": "Quotient rule for derivative of tan x", "kind": "Video", "slug": "quotient-rule-for-derivative-of-tan-x"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/quotient_rule/", "id": "quotient_rule", "title": "Quotient rule", "slug": "quotient_rule", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/using-the-product-rule-and-the-chain-rule/", "id": "UXQGzgPf1LE", "title": "Using the product rule and the chain rule", "kind": "Video", "slug": "using-the-product-rule-and-the-chain-rule"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/combining-the-product-rule-and-chain-rule/", "id": "combining-the-product-rule-and-chain-rule", "title": "Combining the product and chain rules", "description": "If you know the product, quotient, and chain rules, try this exercise full of challenging derivatives.", "slug": "combining-the-product-rule-and-chain-rule", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/product-rule-proof/", "id": "L5ErlC0COxI", "title": "Product rule proof", "kind": "Video", "description": "A proof of the product rule", "slug": "product-rule-proof"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/product-rule/", "id": "h78GdGiRmpM", "title": "Product rule", "kind": "Video", "description": "The product rule. Examples using the Product and Chain rules.", "slug": "product-rule"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/quotient-rule/", "id": "E_1gEtiGPNI", "title": "Quotient rule and common derivatives", "kind": "Video", "description": "Why the quotient rule is the same thing as the product rule. Introduction to the derivative of e^x, ln x, sin x, cos x, and tan x", "slug": "quotient-rule"}, {"path": "khan/math/differential-calculus/taking-derivatives/product_rule/equation-of-a-tangent-line/", "id": "1KwW1v__T_0", "title": "Equation of a tangent line", "kind": "Video", "description": "Finding the equation of the line tangent to f(x)=xe^x when x=1", "slug": "equation-of-a-tangent-line"}], "in_knowledge_map": false, "description": "You can figure out the derivative of f(x). You're also good for g(x). But what about f(x) times g(x)? This is what the product rule is all about. \n\nThis tutorial is all about the product rule. It also covers the quotient rule (which really is just a special case of the product rule).", "node_slug": "product_rule", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/product_rule", "extended_slug": "math/differential-calculus/taking-derivatives/product_rule", "kind": "Topic", "slug": "product_rule"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/", "id": "implicit_differentiation", "hide": false, "title": "Implicit differentiation", "child_data": [{"kind": "Video", "id": "1335926801"}, {"kind": "Video", "id": "1336144047"}, {"kind": "Video", "id": "1309724635"}, {"kind": "Video", "id": "1336092146"}, {"kind": "Video", "id": "1335955875"}, {"kind": "Video", "id": "1336152047"}, {"kind": "Video", "id": "1335852020"}, {"kind": "Exercise", "id": "x4f86d9c1"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/implicit-differentiation-1/", "id": "mSVrqKZDRF4", "title": "Implicit differentiation", "kind": "Video", "slug": "implicit-differentiation-1"}, {"path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/showing-explicit-and-implicit-differentiation-give-same-result/", "id": "2CsQ_l1S2_Y", "title": "Showing explicit and implicit differentiation give same result", "kind": "Video", "slug": "showing-explicit-and-implicit-differentiation-give-same-result"}, {"path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/implicit-derivative-of-x-y-2-x-y-1/", "id": "9uxvm-USEYE", "title": "Implicit derivative of (x-y)^2 = x + y - 1", "kind": "Video", "slug": "implicit-derivative-of-x-y-2-x-y-1"}, {"path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/implicit-derivative-of-y-cos-5x-3y/", "id": "-EG10aI0rt0", "title": "Implicit derivative of y = cos(5x - 3y)", "kind": "Video", "slug": "implicit-derivative-of-y-cos-5x-3y"}, {"path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/implicit-derivative-of-x-2-y-2-3-5x-2y-2/", "id": "1DcsREjyoiM", "title": "Implicit derivative of (x^2+y^2)^3 = 5x^2y^2", "kind": "Video", "slug": "implicit-derivative-of-x-2-y-2-3-5x-2y-2"}, {"path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/finding-slope-of-tangent-line-with-implicit-differentiation/", "id": "KyYC8XzKsHU", "title": "Finding slope of tangent line with implicit differentiation", "kind": "Video", "slug": "finding-slope-of-tangent-line-with-implicit-differentiation"}, {"path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/implicit-derivative-of-e-xy-2-x-y/", "id": "ZtI94pI4Uzc", "title": "Implicit derivative of e^(xy^2) = x - y", "kind": "Video", "slug": "implicit-derivative-of-e-xy-2-x-y"}, {"path": "khan/math/differential-calculus/taking-derivatives/implicit_differentiation/implicit-differentiation/", "id": "implicit-differentiation", "title": "Implicit differentiation", "slug": "implicit-differentiation", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Like people, mathematical relations are not always explicit about their intentions. In this tutorial, we'll be able to take the derivative of one variable with respect to another even when they are implicitly defined (like \"x^2 + y^2 = 1\").", "node_slug": "implicit_differentiation", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/implicit_differentiation", "extended_slug": "math/differential-calculus/taking-derivatives/implicit_differentiation", "kind": "Topic", "slug": "implicit_differentiation"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/", "id": "derivatives-inverse-functions", "hide": false, "title": "Derivatives of inverse functions", "child_data": [{"kind": "Video", "id": "x27ff4cd3"}, {"kind": "Video", "id": "xb6e07b84"}, {"kind": "Video", "id": "x44778b77"}, {"kind": "Video", "id": "x03a2d28c"}, {"kind": "Exercise", "id": "x037a7ef8"}, {"kind": "Video", "id": "24134"}, {"kind": "Video", "id": "xf222e989"}, {"kind": "Exercise", "id": "xeee2eeae"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/derivative-inverse-sine/", "id": "yIQUhXa-n-M", "title": "Derivative of inverse sine", "kind": "Video", "slug": "derivative-inverse-sine"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/derivative-inverse-cosine/", "id": "v_OfFmMRvOc", "title": "Derivative of inverse cosine", "kind": "Video", "slug": "derivative-inverse-cosine"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/derivative-inverse-tangent/", "id": "G7WyEp8gHs0", "title": "Derivative of inverse tangent", "kind": "Video", "slug": "derivative-inverse-tangent"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/derivative-natural-logarithm/", "id": "765X_PAxhAw", "title": "Derivative of natural logarithm", "kind": "Video", "slug": "derivative-natural-logarithm"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/derivatives-of-inverse-functions/", "id": "derivatives-of-inverse-functions", "title": "Derivatives of inverse functions", "description": "Derivatives of inverse functions including inverse trig", "slug": "derivatives-of-inverse-functions", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/calculus-derivative-of-x-x-x/", "id": "N5kkwVoAtkc", "title": "Derivative of x^(x^x)", "kind": "Video", "description": "Derivative of x^(x^x)", "slug": "calculus-derivative-of-x-x-x"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/derivative-log-properties/", "id": "R2JsjJyr0ck", "title": "Derivative using log properties", "kind": "Video", "slug": "derivative-log-properties"}, {"path": "khan/math/differential-calculus/taking-derivatives/derivatives-inverse-functions/logarithmic-differentiation/", "id": "logarithmic-differentiation", "title": "Logarithmic differentiation", "description": "Derivatives involving natural log function including logarithmic differentiation", "slug": "logarithmic-differentiation", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial we explore a common method to find the derivatives of inverse tangent (arctangent), inverse sine (arcsine), inverse cosine (arccosine) and the natural logarithm function.", "node_slug": "derivatives-inverse-functions", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/derivatives-inverse-functions", "extended_slug": "math/differential-calculus/taking-derivatives/derivatives-inverse-functions", "kind": "Topic", "slug": "derivatives-inverse-functions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-calculus/taking-derivatives/der_common_functions/", "id": "der_common_functions", "hide": false, "title": "Proofs of derivatives of common functions", "child_data": [{"kind": "Video", "id": "24128"}, {"kind": "Video", "id": "24130"}, {"kind": "Video", "id": "24132"}], "children": [{"path": "khan/math/differential-calculus/taking-derivatives/der_common_functions/proof-d-dx-ln-x-1-x/", "id": "yUpDRpkUhf4", "title": "Proof: d/dx(ln x) = 1/x", "kind": "Video", "description": "Taking the derivative of ln x", "slug": "proof-d-dx-ln-x-1-x"}, {"path": "khan/math/differential-calculus/taking-derivatives/der_common_functions/proof-d-dx-e-x-e-x/", "id": "sSE6_fK3mu0", "title": "Proof: d/dx(e^x) = e^x", "kind": "Video", "description": "Proof that the derivative of e^x is e^x.", "slug": "proof-d-dx-e-x-e-x"}, {"path": "khan/math/differential-calculus/taking-derivatives/der_common_functions/proofs-of-derivatives-of-ln-x-and-e-x/", "id": "3nQejB-XPoY", "title": "Proofs of derivatives of ln(x) and e^x", "kind": "Video", "description": "Doing both proofs in the same video to clarify any misconceptions that the original proof was \"circular\".", "slug": "proofs-of-derivatives-of-ln-x-and-e-x"}], "in_knowledge_map": false, "description": "We told you about the derivatives of many functions, but you might want proof that what we told you is actually true. That's what this tutorial tries to do!", "node_slug": "der_common_functions", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/taking-derivatives/der_common_functions", "extended_slug": "math/differential-calculus/taking-derivatives/der_common_functions", "kind": "Topic", "slug": "der_common_functions"}], "in_knowledge_map": false, "description": "Calculating derivatives. Power rule. Product and quotient rules. Chain Rule. Implicit differentiation. Derivatives of common functions.", "node_slug": "taking-derivatives", "render_type": "Topic", "topic_page_url": "/math/differential-calculus/taking-derivatives", "extended_slug": "math/differential-calculus/taking-derivatives", "kind": "Topic", "slug": "taking-derivatives"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/", "id": "derivative_applications", "hide": false, "title": "Derivative applications", "child_data": [{"kind": "Topic", "id": "x12f23fa2"}, {"kind": "Topic", "id": "x8449974f"}, {"kind": "Topic", "id": "x3bd2e7e0"}, {"kind": "Topic", "id": "x52772446"}, {"kind": "Topic", "id": "x97d29da2"}, {"kind": "Topic", "id": "x27a1754d"}, {"kind": "Topic", "id": "xb48d116a"}, {"kind": "Topic", "id": "x2366d755"}, {"kind": "Topic", "id": "x192b8612"}, {"kind": "Topic", "id": "x0e9d2350"}, {"kind": "Topic", "id": "x10042584"}, {"kind": "Topic", "id": "xab350981"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/normal-tangent-line-eq/", "id": "normal-tangent-line-eq", "hide": false, "title": "Equations of normal and tangent lines", "child_data": [{"kind": "Video", "id": "xb84c35ba"}, {"kind": "Video", "id": "x8626cdc3"}, {"kind": "Video", "id": "x29623156"}, {"kind": "Exercise", "id": "x82766792"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/normal-tangent-line-eq/tangent-line-intercept/", "id": "FJ7AMaR9miI", "title": "y-intercept of tangent line example", "kind": "Video", "slug": "tangent-line-intercept"}, {"path": "khan/math/differential-calculus/derivative_applications/normal-tangent-line-eq/normal-line-equation/", "id": "C5G2Js2_Ep4", "title": "Equation of normal line", "kind": "Video", "slug": "normal-line-equation"}, {"path": "khan/math/differential-calculus/derivative_applications/normal-tangent-line-eq/tangent-line-equation-example-1/", "id": "GH8-URjRQpQ", "title": "Equation of tangent line example 1", "kind": "Video", "slug": "tangent-line-equation-example-1"}, {"path": "khan/math/differential-calculus/derivative_applications/normal-tangent-line-eq/applications-of-derivatives-tangent-and-normal-lines/", "id": "applications-of-derivatives--tangent-and-normal-lines", "title": "Applications of derivatives: Tangent and normal lines", "slug": "applications-of-derivatives-tangent-and-normal-lines", "kind": "Exercise"}], "in_knowledge_map": false, "description": "A derivative at a point in a curve can be viewed as the slope of the line tangent to that curve at that point. Given this, the natural next question is what the equation of that tangent line is. In this tutorial, we'll not only find equations of tangent lines, but normal ones as well!", "node_slug": "normal-tangent-line-eq", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/normal-tangent-line-eq", "extended_slug": "math/differential-calculus/derivative_applications/normal-tangent-line-eq", "kind": "Topic", "slug": "normal-tangent-line-eq"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/motion-along-line-derivatives/", "id": "motion-along-line-derivatives", "hide": false, "title": "Motion along a line", "child_data": [{"kind": "Video", "id": "x6ae031ba"}, {"kind": "Video", "id": "xc4d31415"}, {"kind": "Video", "id": "x3ef8d055"}, {"kind": "Exercise", "id": "xd1f457fe"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/motion-along-line-derivatives/total-distance-traveled-by-a-particle/", "id": "HDntI7zfBNs", "title": "Total distance traveled by a particle", "kind": "Video", "slug": "total-distance-traveled-by-a-particle"}, {"path": "khan/math/differential-calculus/derivative_applications/motion-along-line-derivatives/analyzing-particle-movement-based-on-graphs/", "id": "wKPyzrEVqaQ", "title": "Analyzing particle movement based on graphs", "kind": "Video", "slug": "analyzing-particle-movement-based-on-graphs"}, {"path": "khan/math/differential-calculus/derivative_applications/motion-along-line-derivatives/when-is-a-particle-speeding-up/", "id": "SE1ltVuE5yM", "title": "When is a particle speeding up", "kind": "Video", "slug": "when-is-a-particle-speeding-up"}, {"path": "khan/math/differential-calculus/derivative_applications/motion-along-line-derivatives/applications-of-derivatives-motion-along-a-line/", "id": "applications-of-derivatives--motion-along-a-line", "title": "Applications of derivatives: Motion along a line", "slug": "applications-of-derivatives-motion-along-a-line", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Derivatives can be used to calculate instantaneous rates of change. The rate of change of position with respect to time is velocity and the rate of change of velocity with respect to time is acceleration. Using these ideas, we'll be able to analyze one-dimensional particle movement given position as a function of time.", "node_slug": "motion-along-line-derivatives", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/motion-along-line-derivatives", "extended_slug": "math/differential-calculus/derivative_applications/motion-along-line-derivatives", "kind": "Topic", "slug": "motion-along-line-derivatives"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/critical_points_graphing/", "id": "critical_points_graphing", "hide": false, "title": "Critical points and graphing with calculus", "child_data": [{"kind": "Video", "id": "1337154539"}, {"kind": "Video", "id": "x13fa2a4c"}, {"kind": "Exercise", "id": "x1eecda27"}, {"kind": "Video", "id": "1337206217"}, {"kind": "Video", "id": "1337114573"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/critical_points_graphing/minima-maxima-and-critical-points/", "id": "lDY9JcFaRd4", "title": "Minima, maxima and critical points", "kind": "Video", "slug": "minima-maxima-and-critical-points"}, {"path": "khan/math/differential-calculus/derivative_applications/critical_points_graphing/finding-critical-numbers/", "id": "MUQfl385Yug", "title": "Finding critical numbers", "kind": "Video", "slug": "finding-critical-numbers"}, {"path": "khan/math/differential-calculus/derivative_applications/critical_points_graphing/critical-numbers/", "id": "critical-numbers", "title": "Critical numbers", "description": "Find critical numbers and determine whether they are local minima or local maxima.", "slug": "critical-numbers", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/derivative_applications/critical_points_graphing/testing-critical-points-for-local-extrema/", "id": "lFQ4kMcODzU", "title": "Testing critical points for local extrema", "kind": "Video", "slug": "testing-critical-points-for-local-extrema"}, {"path": "khan/math/differential-calculus/derivative_applications/critical_points_graphing/identifying-minima-and-maxima-for-x-3-12x-5/", "id": "pInFesXIfg8", "title": "Identifying minima and maxima for x^3 - 12x + 2", "kind": "Video", "slug": "identifying-minima-and-maxima-for-x-3-12x-5"}], "in_knowledge_map": false, "description": "Can calculus be used to figure out when a function takes on a local or global maximum value? Absolutely. Not only that, but derivatives and second derivatives can also help us understand the shape of the function (whether they are concave upward or downward).\n\nIf you have a basic conceptual understanding of derivatives, then you can start applying that knowledge here to identify critical points, extrema, inflections points and even to graph functions.", "node_slug": "critical_points_graphing", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/critical_points_graphing", "extended_slug": "math/differential-calculus/derivative_applications/critical_points_graphing", "kind": "Topic", "slug": "critical_points_graphing"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/absolute-relative-maxima-minima/", "id": "absolute-relative-maxima-minima", "hide": false, "title": "Absolute and relative maxima and minima", "child_data": [{"kind": "Video", "id": "xbf69f66b"}, {"kind": "Video", "id": "xfc106389"}, {"kind": "Video", "id": "x18933bd7"}, {"kind": "Exercise", "id": "xb8538925"}, {"kind": "Video", "id": "x1efba280"}, {"kind": "Exercise", "id": "xd8a5d8ca"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/absolute-relative-maxima-minima/extreme-value-theorem/", "id": "bZYTDst1MOo", "title": "Extreme value theorem", "kind": "Video", "slug": "extreme-value-theorem"}, {"path": "khan/math/differential-calculus/derivative_applications/absolute-relative-maxima-minima/relative-minima-maxima/", "id": "Hoyv3-BMAGc", "title": "Introduction to minimum and maximum points", "kind": "Video", "description": "Sal explains all about minimum and maximum points, both absolute and relative.", "slug": "relative-minima-maxima"}, {"path": "khan/math/differential-calculus/derivative_applications/absolute-relative-maxima-minima/identifying-relative-extrema/", "id": "LSIgi9krswU", "title": "Identifying relative minimum and maximum values", "kind": "Video", "slug": "identifying-relative-extrema"}, {"path": "khan/math/differential-calculus/derivative_applications/absolute-relative-maxima-minima/extreme-values-from-graphs/", "id": "extreme-values-from-graphs", "title": "Extreme values from graphs", "slug": "extreme-values-from-graphs", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/derivative_applications/absolute-relative-maxima-minima/using-extreme-value-theorem/", "id": "JXVGPEOQCb8", "title": "Applying extreme value theorem", "kind": "Video", "slug": "using-extreme-value-theorem"}, {"path": "khan/math/differential-calculus/derivative_applications/absolute-relative-maxima-minima/extreme-value-theorem_1/", "id": "extreme-value-theorem", "title": "Extreme value theorem", "description": "Extreme value theorem and the closed interval method.", "slug": "extreme-value-theorem_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "absolute-relative-maxima-minima", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/absolute-relative-maxima-minima", "extended_slug": "math/differential-calculus/derivative_applications/absolute-relative-maxima-minima", "kind": "Topic", "slug": "absolute-relative-maxima-minima"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/", "id": "concavity-inflection-points", "hide": false, "title": "Concavity and inflection points", "child_data": [{"kind": "Video", "id": "1337193144"}, {"kind": "Video", "id": "x22647994"}, {"kind": "Exercise", "id": "1425254403"}, {"kind": "Video", "id": "1336987809"}, {"kind": "Video", "id": "355054"}, {"kind": "Video", "id": "366056"}, {"kind": "Exercise", "id": "x2240397b"}, {"kind": "Exercise", "id": "xe67c8fbc"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/concavity-concave-upwards-and-concave-downwards-intervals/", "id": "LcEqOzNov4E", "title": "Concavity, concave upwards and concave downwards intervals", "kind": "Video", "slug": "concavity-concave-upwards-and-concave-downwards-intervals"}, {"path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/recognizing-concavity-exercise/", "id": "ulyyusmpc9w", "title": "Recognizing concavity exercise", "kind": "Video", "slug": "recognizing-concavity-exercise"}, {"path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/recognizing_concavity/", "id": "recognizing_concavity", "title": "Recognizing concavity", "description": "Identify concave upwards and concave downwards intervals on graphs of functions", "slug": "recognizing_concavity", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/inflection-points/", "id": "UK2shgCXALo", "title": "Inflection points", "kind": "Video", "slug": "inflection-points"}, {"path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/calculus-graphing-using-derivatives/", "id": "hIgnece9ins", "title": "Graphing using derivatives", "kind": "Video", "description": "Graphing functions using derivatives.", "slug": "calculus-graphing-using-derivatives"}, {"path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/calculus-graphing-with-derivatives-example/", "id": "zC_dTaEY2AY", "title": "Another example graphing with derivatives", "kind": "Video", "description": "Using the first and second derivatives to identify critical points and inflection points and to graph the function.", "slug": "calculus-graphing-with-derivatives-example"}, {"path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/concavity-and-the-second-derivative/", "id": "concavity-and-the-second-derivative", "title": "Concavity and the second derivative", "slug": "concavity-and-the-second-derivative", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/derivative_applications/concavity-inflection-points/second-derivative-test/", "id": "second-derivative-test", "title": "Second derivative test", "description": "The second derivative test for extrema", "slug": "second-derivative-test", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "concavity-inflection-points", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/concavity-inflection-points", "extended_slug": "math/differential-calculus/derivative_applications/concavity-inflection-points", "kind": "Topic", "slug": "concavity-inflection-points"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/calc_optimization/", "id": "calc_optimization", "hide": false, "title": "Optimization with calculus", "child_data": [{"kind": "Video", "id": "1339427794"}, {"kind": "Video", "id": "1338874025"}, {"kind": "Video", "id": "1339153034"}, {"kind": "Video", "id": "1339412561"}, {"kind": "Video", "id": "1339500281"}, {"kind": "Video", "id": "1393028914"}, {"kind": "Video", "id": "1392948670"}, {"kind": "Exercise", "id": "x0c0e2e39"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/calc_optimization/minimizing-sum-of-squares/", "id": "1TK8V_qmqrk", "title": "Minimizing sum of squares", "kind": "Video", "slug": "minimizing-sum-of-squares"}, {"path": "khan/math/differential-calculus/derivative_applications/calc_optimization/optimizing-box-volume-graphically/", "id": "MC0tq6fNRwU", "title": "Optimizing box volume graphically", "kind": "Video", "slug": "optimizing-box-volume-graphically"}, {"path": "khan/math/differential-calculus/derivative_applications/calc_optimization/optimizing-box-volume-analytically/", "id": "cRboY08YG8g", "title": "Optimizing box volume analytically", "kind": "Video", "slug": "optimizing-box-volume-analytically"}, {"path": "khan/math/differential-calculus/derivative_applications/calc_optimization/optimizing-profit-at-a-shoe-factory/", "id": "dam16G6cZ8k", "title": "Optimizing profit at a shoe factory", "kind": "Video", "slug": "optimizing-profit-at-a-shoe-factory"}, {"path": "khan/math/differential-calculus/derivative_applications/calc_optimization/minimizing-the-cost-of-a-storage-container/", "id": "tSMuKcN-RKM", "title": "Minimizing the cost of a storage container", "kind": "Video", "slug": "minimizing-the-cost-of-a-storage-container"}, {"path": "khan/math/differential-calculus/derivative_applications/calc_optimization/expression-for-combined-area-of-triangle-and-square/", "id": "IFU7Go6Qg6E", "title": "Expression for combined area of triangle and square", "kind": "Video", "slug": "expression-for-combined-area-of-triangle-and-square"}, {"path": "khan/math/differential-calculus/derivative_applications/calc_optimization/minimizing-combined-area/", "id": "eS-_ZFzHjYA", "title": "Minimizing combined area", "kind": "Video", "slug": "minimizing-combined-area"}, {"path": "khan/math/differential-calculus/derivative_applications/calc_optimization/optimization/", "id": "optimization", "title": "Optimization", "slug": "optimization", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Using calculus to solve optimization problems", "node_slug": "calc_optimization", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/calc_optimization", "extended_slug": "math/differential-calculus/derivative_applications/calc_optimization", "kind": "Topic", "slug": "calc_optimization"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/differentiation-application/", "id": "differentiation-application", "hide": false, "title": "Applying differentiation in different fields", "child_data": [{"kind": "Video", "id": "xa93afa81"}, {"kind": "Video", "id": "xcfc56b46"}, {"kind": "Video", "id": "x1c23041a"}, {"kind": "Exercise", "id": "x9d9aab2b"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/differentiation-application/derivative-and-marginal-cost/", "id": "Wkjz1LlX1CQ", "title": "Derivative and marginal cost", "kind": "Video", "slug": "derivative-and-marginal-cost"}, {"path": "khan/math/differential-calculus/derivative_applications/differentiation-application/approximating-incremental-cost-with-derivative/", "id": "iVAYOeGmNqo", "title": "Approximating incremental cost with derivative", "kind": "Video", "slug": "approximating-incremental-cost-with-derivative"}, {"path": "khan/math/differential-calculus/derivative_applications/differentiation-application/modeling-a-forgetting-curve/", "id": "WbyODj_OiZU", "title": "Modeling a forgetting curve", "kind": "Video", "slug": "modeling-a-forgetting-curve"}, {"path": "khan/math/differential-calculus/derivative_applications/differentiation-application/applications-of-differentiation-in-biology-economics-physics-etc/", "id": "applications-of-differentiation-in-biology--economics--physics--etc", "title": "Applications of differentiation in biology, economics, physics, etc.", "slug": "applications-of-differentiation-in-biology-economics-physics-etc", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The idea of a derivative being the instantaneous rate of change is useful when studying or thinking about phenomena in a whole range of fields. In this tutorial, we begin to just scratch the surface as we apply derivatives in fields as disperse as biology and economics.", "node_slug": "differentiation-application", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/differentiation-application", "extended_slug": "math/differential-calculus/derivative_applications/differentiation-application", "kind": "Topic", "slug": "differentiation-application"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/rates_of_change/", "id": "rates_of_change", "hide": false, "title": "Related rates", "child_data": [{"kind": "Video", "id": "1339382000"}, {"kind": "Video", "id": "1341818796"}, {"kind": "Video", "id": "1339646438"}, {"kind": "Video", "id": "1339617514"}, {"kind": "Video", "id": "1353379359"}, {"kind": "Video", "id": "1353395672"}, {"kind": "Exercise", "id": "x79640cff"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/rates_of_change/rates-of-change-between-radius-and-area-of-circle/", "id": "kQF9pOqmS0U", "title": "Rates of change between radius and area of circle", "kind": "Video", "slug": "rates-of-change-between-radius-and-area-of-circle"}, {"path": "khan/math/differential-calculus/derivative_applications/rates_of_change/rate-of-change-of-balloon-height/", "id": "_kbd6troMgA", "title": "Rate of change of balloon height", "kind": "Video", "slug": "rate-of-change-of-balloon-height"}, {"path": "khan/math/differential-calculus/derivative_applications/rates_of_change/related-rates-of-water-pouring-into-cone/", "id": "Xe6YlrCgkIo", "title": "Related rates of water pouring into cone", "kind": "Video", "slug": "related-rates-of-water-pouring-into-cone"}, {"path": "khan/math/differential-calculus/derivative_applications/rates_of_change/falling-ladder-related-rates/", "id": "kBVDSu7v8os", "title": "Falling ladder related rates", "kind": "Video", "slug": "falling-ladder-related-rates"}, {"path": "khan/math/differential-calculus/derivative_applications/rates_of_change/rate-of-change-of-distance-between-approaching-cars/", "id": "wV59XWLmv0c", "title": "Rate of change of distance between approaching cars", "kind": "Video", "slug": "rate-of-change-of-distance-between-approaching-cars"}, {"path": "khan/math/differential-calculus/derivative_applications/rates_of_change/speed-of-shadow-of-diving-bird/", "id": "cPOjnyjii-4", "title": "Speed of shadow of diving bird", "kind": "Video", "slug": "speed-of-shadow-of-diving-bird"}, {"path": "khan/math/differential-calculus/derivative_applications/rates_of_change/related-rates/", "id": "related-rates", "title": "Related rates", "slug": "related-rates", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Have you ever wondered how fast the area of a ripple of a pond is increasing based on how fast the ripple is? What about how fast a volcano's volume is increasing? This tutorial on related rates will satiate your curiosity and then some!\n\n\nSolving related rates problems using calculus", "node_slug": "rates_of_change", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/rates_of_change", "extended_slug": "math/differential-calculus/derivative_applications/rates_of_change", "kind": "Topic", "slug": "rates_of_change"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/", "id": "mean_value_theorem", "hide": false, "title": "Mean value theorem", "child_data": [{"kind": "Video", "id": "x497fcea6"}, {"kind": "Video", "id": "xb8ad8f0a"}, {"kind": "Video", "id": "xe252a20d"}, {"kind": "Video", "id": "xc2570cca"}, {"kind": "Exercise", "id": "x4b50ba14"}, {"kind": "Video", "id": "24178"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/mean-value-theorem-1/", "id": "6hri9k_2R8o", "title": "Mean value theorem", "kind": "Video", "slug": "mean-value-theorem-1"}, {"path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/finding-where-the-derivative-is-equal-to-the-average-change/", "id": "S_YIUXy-WFM", "title": "Finding where the derivative is equal to the average change", "kind": "Video", "slug": "finding-where-the-derivative-is-equal-to-the-average-change"}, {"path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/getting-a-ticket-because-of-the-mean-value-theorem/", "id": "InrLtU3k3Y8", "title": "Getting a ticket because of the mean value theorem", "kind": "Video", "slug": "getting-a-ticket-because-of-the-mean-value-theorem"}, {"path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/maximizing-function-at-value/", "id": "EXLVMGSDQbI", "title": "Maximizing function at value", "kind": "Video", "slug": "maximizing-function-at-value"}, {"path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/mean-value-theorem_1/", "id": "mean-value-theorem", "title": "Mean value theorem", "slug": "mean-value-theorem_1", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/derivative_applications/mean_value_theorem/mean-value-theorem/", "id": "bGNMXfaNR5Q", "title": "Mean value theorem", "kind": "Video", "description": "Intuition behind the Mean Value Theorem", "slug": "mean-value-theorem"}], "in_knowledge_map": false, "description": "If over the last hour on the highway, you averaged 60 miles per hour, then you must have been going exactly 60 miles per hour at some point. This is the gist of the mean value theorem (which generalizes the idea for any continuous, differentiable function).", "node_slug": "mean_value_theorem", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/mean_value_theorem", "extended_slug": "math/differential-calculus/derivative_applications/mean_value_theorem", "kind": "Topic", "slug": "mean_value_theorem"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/", "id": "lhopital_rule", "hide": false, "title": "L'H\u00f4pital's rule", "child_data": [{"kind": "Video", "id": "27376"}, {"kind": "Video", "id": "27377"}, {"kind": "Video", "id": "27378"}, {"kind": "Video", "id": "27379"}, {"kind": "Video", "id": "x831dfb4a"}, {"kind": "Video", "id": "xdb5ee8fb"}, {"kind": "Exercise", "id": "427782083"}, {"kind": "Video", "id": "1383606650"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/introduction-to-l-hopital-s-rule/", "id": "PdSzruR5OeE", "title": "Introduction to l'H\u00f4pital's rule", "kind": "Video", "description": "Introduction to L'H\u00f4pital's Rule", "slug": "introduction-to-l-hopital-s-rule"}, {"path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/l-hopital-s-rule-example-1/", "id": "BiVOC3WocXs", "title": "L'H\u00f4pital's rule example 1", "kind": "Video", "description": "L'H\u00f4pital's Rule Example 1", "slug": "l-hopital-s-rule-example-1"}, {"path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/l-hopital-s-rule-example-2/", "id": "FJo18AwLfuI", "title": "L'H\u00f4pital's rule example 2", "kind": "Video", "description": "L'H\u00f4pital's Rule Example 2", "slug": "l-hopital-s-rule-example-2"}, {"path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/l-hopital-s-rule-example-3/", "id": "MeVFZjT-ABM", "title": "L'H\u00f4pital's rule example 3", "kind": "Video", "description": "L'H\u00f4pital's Rule Example 3", "slug": "l-hopital-s-rule-example-3"}, {"path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/lhopitals-rule-to-solve-for-variable/", "id": "Ot0FxL8Vl7I", "title": "L'Hopital's Rule to solve for variable", "kind": "Video", "slug": "lhopitals-rule-to-solve-for-variable"}, {"path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/tricky-lhopitals-rule-problem/", "id": "CDf_aE5yg3A", "title": "Tricky L'Hopital's Rule problem", "kind": "Video", "slug": "tricky-lhopitals-rule-problem"}, {"path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/lhopitals_rule/", "id": "lhopitals_rule", "title": "L'H\u00f4pital's rule", "slug": "lhopitals_rule", "kind": "Exercise"}, {"path": "khan/math/differential-calculus/derivative_applications/lhopital_rule/proof-of-special-case-of-l-hopital-s-rule/", "id": "SIB4WDYF5DQ", "title": "Proof of special case of l'H\u00f4pital's rule", "kind": "Video", "slug": "proof-of-special-case-of-l-hopital-s-rule"}], "in_knowledge_map": false, "description": "Limits have done their part helping to find derivatives. Now, under the guidance of l'H\u00f4pital's rule, derivatives are looking to show their gratitude by helping to find limits. Ever try to evaluate a function at a point and get 0/0 or infinity/infinity? Well, that's a big clue that l'Hopital's rule can help you find the limit of the function at that point.", "node_slug": "lhopital_rule", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/lhopital_rule", "extended_slug": "math/differential-calculus/derivative_applications/lhopital_rule", "kind": "Topic", "slug": "lhopital_rule"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-calculus/derivative_applications/local-linearization/", "id": "local-linearization", "hide": false, "title": "Local linearization", "child_data": [{"kind": "Video", "id": "x1822071e"}, {"kind": "Video", "id": "xb92e147d"}, {"kind": "Exercise", "id": "x790152ee"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/local-linearization/local-linearization-intro/", "id": "u7dhn-hBHzQ", "title": "Local linearization", "kind": "Video", "slug": "local-linearization-intro"}, {"path": "khan/math/differential-calculus/derivative_applications/local-linearization/local-linearization-example/", "id": "CDmJL-VNlaM", "title": "Local linearization example", "kind": "Video", "slug": "local-linearization-example"}, {"path": "khan/math/differential-calculus/derivative_applications/local-linearization/local-linearization/", "id": "local-linearization", "title": "Local linearization", "slug": "local-linearization", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's see how we can local linearization can be used to approximate values of functions near values that we know.", "node_slug": "local-linearization", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/local-linearization", "extended_slug": "math/differential-calculus/derivative_applications/local-linearization", "kind": "Topic", "slug": "local-linearization"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/differential-calculus/derivative_applications/tangent-to-polar-curve/", "id": "tangent-to-polar-curve", "hide": false, "title": "Tangents to polar curves", "child_data": [{"kind": "Exercise", "id": "x1fea40f4"}], "children": [{"path": "khan/math/differential-calculus/derivative_applications/tangent-to-polar-curve/tangents-to-polar-curves/", "id": "tangents-to-polar-curves", "title": "Tangents to polar curves", "slug": "tangents-to-polar-curves", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "tangent-to-polar-curve", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/derivative_applications/tangent-to-polar-curve", "extended_slug": "math/differential-calculus/derivative_applications/tangent-to-polar-curve", "kind": "Topic", "slug": "tangent-to-polar-curve"}], "in_knowledge_map": false, "description": "Minima, maxima, and critical points. Rates of change. Optimization. L'Hopital's rule. Mean value theorem.", "node_slug": "derivative_applications", "render_type": "Topic", "topic_page_url": "/math/differential-calculus/derivative_applications", "extended_slug": "math/differential-calculus/derivative_applications", "kind": "Topic", "slug": "derivative_applications"}, {"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/math/differential-calculus/diff-calc-miscellaneous/", "id": "diff-calc-miscellaneous", "hide": false, "title": "Miscellaneous", "child_data": [{"kind": "Topic", "id": "x6898660d"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/math/differential-calculus/diff-calc-miscellaneous/calc-readiness-warmup/", "id": "calc-readiness-warmup", "hide": false, "title": "Calculus readiness warmup", "child_data": [{"kind": "Exercise", "id": "x7dcb65e6"}], "children": [{"path": "khan/math/differential-calculus/diff-calc-miscellaneous/calc-readiness-warmup/differential-calculus-warmup/", "id": "differential-calculus-warmup", "title": "Differential calculus warmup", "description": "Are you ready to tackle calculus? Check your understanding of foundational skills with this short quiz.", "slug": "differential-calculus-warmup", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "calc-readiness-warmup", "render_type": "Tutorial", "topic_page_url": "/math/differential-calculus/diff-calc-miscellaneous/calc-readiness-warmup", "extended_slug": "math/differential-calculus/diff-calc-miscellaneous/calc-readiness-warmup", "kind": "Topic", "slug": "calc-readiness-warmup"}], "in_knowledge_map": false, "description": "", "node_slug": "diff-calc-miscellaneous", "render_type": "Topic", "topic_page_url": "/math/differential-calculus/diff-calc-miscellaneous", "extended_slug": "math/differential-calculus/diff-calc-miscellaneous", "kind": "Topic", "slug": "diff-calc-miscellaneous"}], "in_knowledge_map": false, "description": "How would you like to follow in the footsteps of Euclid and Archimedes? Would you like to be able to determine precisely how fast Usain Bolt is accelerating exactly 2 seconds after the starting gun? Differential calculus deals with the study of the rates at which quantities change. It is one of the two principle areas of calculus. The fathers of modern calculus, Isaac Newton and Gottfried Leibniz, independently formulated the fundamental theorem of calculus relating differentiation and integration. Differential calculus and integral calculus are connected by the fundamental theorem of calculus, which states that differentiation is the reverse process to integration.", "node_slug": "differential-calculus", "render_type": "Subject", "topic_page_url": "/math/differential-calculus", "extended_slug": "math/differential-calculus", "kind": "Topic", "slug": "differential-calculus"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/integral-calculus/", "id": "integral-calculus", "hide": false, "title": "Integral calculus", "child_data": [{"kind": "Topic", "id": "xb640969d"}, {"kind": "Topic", "id": "x07443e9b"}, {"kind": "Topic", "id": "xa7f36ed3"}, {"kind": "Topic", "id": "xd5b0e615"}, {"kind": "Topic", "id": "x4a22631b"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/integral-calculus/indefinite-definite-integrals/", "id": "indefinite-definite-integrals", "hide": false, "title": "Integrals", "child_data": [{"kind": "Topic", "id": "xe894bd39"}, {"kind": "Topic", "id": "x80560cc6"}, {"kind": "Topic", "id": "x7ae76dbb"}, {"kind": "Topic", "id": "x878f76ac"}, {"kind": "Topic", "id": "x34e27d98"}, {"kind": "Topic", "id": "xdaad1380"}, {"kind": "Topic", "id": "xf4069f98"}, {"kind": "Topic", "id": "xbdb962f4"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/", "id": "indefinite_integrals", "hide": false, "title": "Indefinite integral as anti-derivative", "child_data": [{"kind": "Video", "id": "1328880986"}, {"kind": "Video", "id": "1328847625"}, {"kind": "Video", "id": "1328998382"}, {"kind": "Video", "id": "1329132099"}, {"kind": "Video", "id": "1328896635"}, {"kind": "Exercise", "id": "xd4a15831"}, {"kind": "Video", "id": "x5057fce2"}, {"kind": "Video", "id": "x5a81de3b"}, {"kind": "Exercise", "id": "x5211b6cc"}, {"kind": "Video", "id": "xecee68b6"}, {"kind": "Exercise", "id": "xd4b72490"}], "children": [{"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/antiderivatives-and-indefinite-integrals/", "id": "MMv-027KEqU", "title": "Antiderivatives and indefinite integrals", "kind": "Video", "slug": "antiderivatives-and-indefinite-integrals"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/indefinite-integrals-of-x-raised-to-a-power/", "id": "QxbJsg-Vdms", "title": "Indefinite integrals of x raised to a power", "kind": "Video", "slug": "indefinite-integrals-of-x-raised-to-a-power"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/antiderivative-of-x-1/", "id": "sPPjk4aXzmQ", "title": "Antiderivative of x^-1", "kind": "Video", "slug": "antiderivative-of-x-1"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/basic-trig-and-exponential-antiderivatives/", "id": "hXg-6YgAARk", "title": "Basic trig and exponential antiderivatives", "kind": "Video", "slug": "basic-trig-and-exponential-antiderivatives"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/antiderivative-of-hairier-expression/", "id": "cBi4a1iSaPk", "title": "Antiderivative of hairier expression", "kind": "Video", "slug": "antiderivative-of-hairier-expression"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/antiderivatives/", "id": "antiderivatives", "title": "Finding antiderivatives", "slug": "antiderivatives", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/visual-anti-derivative/", "id": "nZrxs-U9d8o", "title": "Visually determining antiderivative", "kind": "Video", "slug": "visual-anti-derivative"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/graphs-of-indefinite-integrals/", "id": "Gn3mJOC1wK8", "title": "Graphs of indefinite integrals", "kind": "Video", "slug": "graphs-of-indefinite-integrals"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/graphs-of-antiderivatives/", "id": "graphs-of-antiderivatives", "title": "Graphs of antiderivatives", "description": "Identify the graphs of antiderivatives", "slug": "graphs-of-antiderivatives", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/antiderivative-acceleration/", "id": "sLw902V40L0", "title": "Velocity and position from acceleration", "kind": "Video", "slug": "antiderivative-acceleration"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals/indefinite-integrals/", "id": "indefinite-integrals", "title": "Finding the constant of integration", "slug": "indefinite-integrals", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You are very familiar with taking the derivative of a function. Now we are going to go the other way around--if I give you a derivative of a function, can you come up with a possible original function. The symbol which we'll use to denote the anti-derivative will see strange at first, but it will all come together in a few tutorials when we see the connection between areas under curves, integrals and anti-derivatives.", "node_slug": "indefinite_integrals", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/indefinite-definite-integrals/indefinite_integrals", "extended_slug": "math/integral-calculus/indefinite-definite-integrals/indefinite_integrals", "kind": "Topic", "slug": "indefinite_integrals"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/indefinite-definite-integrals/area-under-rate-function/", "id": "area-under-rate-function", "hide": false, "title": "Area under a rate function as net change", "child_data": [{"kind": "Video", "id": "x195c42e1"}, {"kind": "Video", "id": "x4d22ba5a"}, {"kind": "Exercise", "id": "x486d32c2"}], "children": [{"path": "khan/math/integral-calculus/indefinite-definite-integrals/area-under-rate-function/area-under-rate-net-change/", "id": "6FTiHeius1c", "title": "Area under rate function", "kind": "Video", "slug": "area-under-rate-net-change"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/area-under-rate-function/area-under-rate-function-example/", "id": "okjt-OZY1JU", "title": "Total water in a tub", "kind": "Video", "slug": "area-under-rate-function-example"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/area-under-rate-function/area-under-a-rate-function-equals-net-change/", "id": "area-under-a-rate-function-equals-net-change", "title": "Area under a rate function equals net change", "description": "Area under the graph of a rate of change function interpreted as net change", "slug": "area-under-a-rate-function-equals-net-change", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Differential calculus was all about rates (that is, after all, what a derivative is). As we'll see, integral calculus is all about the idea of summing or \"integrating\" an infinitely many infinitely small small things to get a finite value (often the area under a curve). Despite not really having any calculus in it, this tutorial foreshadows the connection between rates and areas under curves. As we'll see, this is the foundation of the fundamental connections in all of calculus!", "node_slug": "area-under-rate-function", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/indefinite-definite-integrals/area-under-rate-function", "extended_slug": "math/integral-calculus/indefinite-definite-integrals/area-under-rate-function", "kind": "Topic", "slug": "area-under-rate-function"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/", "id": "riemann-sums", "hide": false, "title": "Riemann sums", "child_data": [{"kind": "Video", "id": "1319674060"}, {"kind": "Video", "id": "1319350944"}, {"kind": "Video", "id": "xde408b5b"}, {"kind": "Video", "id": "xf873a305"}, {"kind": "Exercise", "id": "x2d2f510f"}, {"kind": "Video", "id": "x9cd535ed"}, {"kind": "Exercise", "id": "x51078ac4"}, {"kind": "Video", "id": "1319439886"}, {"kind": "Video", "id": "1319516835"}, {"kind": "Exercise", "id": "x614ed4c1"}, {"kind": "Video", "id": "1319594360"}, {"kind": "Video", "id": "xe8e2492c"}, {"kind": "Exercise", "id": "x24b5b79a"}, {"kind": "Video", "id": "x960af98c"}, {"kind": "Exercise", "id": "xf59ea7ee"}], "children": [{"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/simple-riemann-approximation-using-rectangles/", "id": "dEAk0BHBYCM", "title": "Simple Riemann approximation using rectangles", "kind": "Video", "slug": "simple-riemann-approximation-using-rectangles"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/generalizing-a-left-riemann-sum-with-equally-spaced-rectangles/", "id": "ViqrHGae7FA", "title": "Generalizing a left Riemann sum with equally spaced rectangles", "kind": "Video", "slug": "generalizing-a-left-riemann-sum-with-equally-spaced-rectangles"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/approximating-distance-with-rectangles/", "id": "v13fraCiLEg", "title": "Approximating distance travelled", "kind": "Video", "slug": "approximating-distance-with-rectangles"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/practice-approximating-area-under-curve/", "id": "3ZhUdleD1lQ", "title": "Approximating area under curve and sigma notation", "kind": "Video", "slug": "practice-approximating-area-under-curve"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/using-rectangles-to-approximate-area-under-a-curve/", "id": "using-rectangles-to-approximate-area-under-a-curve", "title": "Using rectangles to approximate area under a curve", "slug": "using-rectangles-to-approximate-area-under-a-curve", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/riemann-sum-negative-function/", "id": "WeVWv_OEJsY", "title": "Riemann sum when function is negative", "kind": "Video", "slug": "riemann-sum-negative-function"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/riemann-sums-and-sigma-notation/", "id": "riemann-sums-and-sigma-notation", "title": "Riemann sums and sigma notation", "slug": "riemann-sums-and-sigma-notation", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/rectangular-and-trapezoidal-riemann-approximations/", "id": "naRUWPvsQbQ", "title": "Rectangular and trapezoidal Riemann approximations", "kind": "Video", "slug": "rectangular-and-trapezoidal-riemann-approximations"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/trapezoidal-approximation-of-area-under-curve/", "id": "1p0NHR5w0Lc", "title": "Trapezoidal approximation of area under curve", "kind": "Video", "slug": "trapezoidal-approximation-of-area-under-curve"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/trapezoid-rule/", "id": "trapezoid-rule", "title": "Trapezoid rule", "slug": "trapezoid-rule", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/riemann-sums-and-integrals/", "id": "CXCtqBlEZ7g", "title": "Riemann sums and integrals", "kind": "Video", "slug": "riemann-sums-and-integrals"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/estimates-of-area/", "id": "gIQgnSfUB6E", "title": "Ranking area estimates", "kind": "Video", "slug": "estimates-of-area"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/the-definite-integral-as-the-limit-of-a-riemann-sum/", "id": "the-definite-integral-as-the-limit-of-a-riemann-sum", "title": "The definite integral as the limit of a Riemann sum", "slug": "the-definite-integral-as-the-limit-of-a-riemann-sum", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/evaluating-definite-integral-from-graph/", "id": "hTTDI49LhjE", "title": "Evaluating definite integral from graph", "kind": "Video", "slug": "evaluating-definite-integral-from-graph"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/riemann-sums/evaluating-a-definite-integral-from-a-graph/", "id": "evaluating-a-definite-integral-from-a-graph", "title": "Evaluating a definite integral from a graph", "slug": "evaluating-a-definite-integral-from-a-graph", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we'll think about how we can find the area under a curve. We'll first approximate this with rectangles (and trapezoids)--generally called Riemann sums. We'll then think about find the exact area by having the number of rectangles approach infinity (they'll have infinitesimal widths) which we'll use the definite integral to denote.", "node_slug": "riemann-sums", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/indefinite-definite-integrals/riemann-sums", "extended_slug": "math/integral-calculus/indefinite-definite-integrals/riemann-sums", "kind": "Topic", "slug": "riemann-sums"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/", "id": "properties-definite-integral", "hide": false, "title": "Properties of the definite integral", "child_data": [{"kind": "Video", "id": "xdfa7ddb8"}, {"kind": "Video", "id": "x78778540"}, {"kind": "Video", "id": "x931cc126"}, {"kind": "Video", "id": "x99ada59b"}, {"kind": "Video", "id": "xc47bb119"}, {"kind": "Video", "id": "x87d0c9ae"}, {"kind": "Video", "id": "xf75f8b7d"}, {"kind": "Exercise", "id": "x5b490f32"}], "children": [{"path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/integrating-scaled-function/", "id": "JyArK4jw3XU", "title": "Integrating scaled version of function", "kind": "Video", "slug": "integrating-scaled-function"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/integrating-function-sums/", "id": "JUouea9XoF8", "title": "Integrating sums of functions", "kind": "Video", "slug": "integrating-function-sums"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/same-integration-bounds/", "id": "q3qvkZxhchE", "title": "Definite integral from and to same point", "kind": "Video", "slug": "same-integration-bounds"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/breaking-integral-interval/", "id": "BE1FK7vDVq0", "title": "Breaking up integral interval", "kind": "Video", "slug": "breaking-integral-interval"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/definite-integral-shifted-function/", "id": "09VLUSkaZU8", "title": "Definite integral of shifted function", "kind": "Video", "slug": "definite-integral-shifted-function"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/switching-integral-bounds/", "id": "L5eBJjx2FP8", "title": "Switching bounds of definite integral", "kind": "Video", "slug": "switching-integral-bounds"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/examples-leveraging-definite-integral/", "id": "dX0JyJRTXm4", "title": "Examples leveraging integration properties", "kind": "Video", "slug": "examples-leveraging-definite-integral"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral/properties-of-integrals/", "id": "properties-of-integrals", "title": "Properties of integrals", "slug": "properties-of-integrals", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You now know that the area under a curve can be denoted by a definite integral. In this tutorial, we'll extend that knowledge by exploring various properties of the definite integral (that will be really useful later on in life)!", "node_slug": "properties-definite-integral", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/indefinite-definite-integrals/properties-definite-integral", "extended_slug": "math/integral-calculus/indefinite-definite-integrals/properties-definite-integral", "kind": "Topic", "slug": "properties-definite-integral"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/indefinite-definite-integrals/functions-defined-by-integrals/", "id": "functions-defined-by-integrals", "hide": false, "title": "Functions defined by integrals", "child_data": [{"kind": "Video", "id": "x1decd87a"}, {"kind": "Video", "id": "x346b5c30"}, {"kind": "Exercise", "id": "x63f9511b"}], "children": [{"path": "khan/math/integral-calculus/indefinite-definite-integrals/functions-defined-by-integrals/evaluating-function-defined-by-integral/", "id": "h6mZLTpTHcU", "title": "Evaluating a function defined by an integral", "kind": "Video", "slug": "evaluating-function-defined-by-integral"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/functions-defined-by-integrals/integral-defined-function-0/", "id": "W20SoZiJOHU", "title": "When an integral defined function is 0", "kind": "Video", "slug": "integral-defined-function-0"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/functions-defined-by-integrals/functions-defined-by-integrals/", "id": "functions-defined-by-integrals", "title": "Functions defined by integrals", "slug": "functions-defined-by-integrals", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's explore functions defined by definite integrals. It will hopefully give you a deeper appreciation of what a definite integral represents.", "node_slug": "functions-defined-by-integrals", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/indefinite-definite-integrals/functions-defined-by-integrals", "extended_slug": "math/integral-calculus/indefinite-definite-integrals/functions-defined-by-integrals", "kind": "Topic", "slug": "functions-defined-by-integrals"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/", "id": "fundamental-theorem-of-calculus", "hide": false, "title": "Fundamental theorem of calculus", "child_data": [{"kind": "Video", "id": "1353533334"}, {"kind": "Video", "id": "1362669934"}, {"kind": "Video", "id": "1363004264"}, {"kind": "Video", "id": "1362611642"}, {"kind": "Video", "id": "1363005217"}, {"kind": "Exercise", "id": "x2a3207e0"}], "children": [{"path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/fundamental-theorem-of-calculus/", "id": "C7ducZoLKgw", "title": "Fundamental theorem of calculus", "kind": "Video", "slug": "fundamental-theorem-of-calculus"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/applying-the-fundamental-theorem-of-calculus/", "id": "FcLeaD3UII4", "title": "Applying the fundamental theorem of calculus", "kind": "Video", "slug": "applying-the-fundamental-theorem-of-calculus"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/swapping-the-bounds-for-definite-integral/", "id": "TqGCNNlx6pU", "title": "Swapping the bounds for definite integral", "kind": "Video", "slug": "swapping-the-bounds-for-definite-integral"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/both-bounds-being-a-function-of-x/", "id": "0z52CLjC2C0", "title": "Both bounds being a function of x", "kind": "Video", "slug": "both-bounds-being-a-function-of-x"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/proof-of-fundamental-theorem-of-calculus/", "id": "pWtt0AvU0KA", "title": "Proof of fundamental theorem of calculus", "kind": "Video", "slug": "proof-of-fundamental-theorem-of-calculus"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus/the-fundamental-theorem-of-calculus/", "id": "the-fundamental-theorem-of-calculus", "title": "The fundamental theorem of calculus", "slug": "the-fundamental-theorem-of-calculus", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You get the general idea that taking a definite integral of a function is related to evaluating the antiderivative, but where did this connection come from. This tutorial focuses on the fundamental theorem of calculus which ties the ideas of integration and differentiation together. We'll explain what it is, give a proof and then show examples of taking derivatives of integrals where the Fundamental Theorem is directly applicable.", "node_slug": "fundamental-theorem-of-calculus", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus", "extended_slug": "math/integral-calculus/indefinite-definite-integrals/fundamental-theorem-of-calculus", "kind": "Topic", "slug": "fundamental-theorem-of-calculus"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/indefinite-definite-integrals/definite_integrals/", "id": "definite_integrals", "hide": false, "title": "Evaluating definite integrals", "child_data": [{"kind": "Video", "id": "1319594360"}, {"kind": "Video", "id": "1362356573"}, {"kind": "Video", "id": "1319534849"}, {"kind": "Video", "id": "1319502914"}, {"kind": "Exercise", "id": "x7a425c8e"}, {"kind": "Video", "id": "1329076337"}, {"kind": "Exercise", "id": "x0ab01753"}], "children": [{"path": "khan/math/integral-calculus/indefinite-definite-integrals/definite_integrals/riemann-sums-and-integrals/", "id": "CXCtqBlEZ7g", "title": "Riemann sums and integrals", "kind": "Video", "slug": "riemann-sums-and-integrals"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/definite_integrals/connecting-the-first-and-second-fundamental-theorems-of-calculus/", "id": "JbfVrwxuPxM", "title": "Connecting the first and second fundamental theorems of calculus", "kind": "Video", "slug": "connecting-the-first-and-second-fundamental-theorems-of-calculus"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/definite_integrals/intuition-for-second-fundamental-theorem-of-calculus/", "id": "Cz_GWNdf_68", "title": "Intuition for second fundamental theorem of calculus", "kind": "Video", "slug": "intuition-for-second-fundamental-theorem-of-calculus"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/definite_integrals/evaluating-simple-definite-integral/", "id": "xR4AnXDBnsw", "title": "Evaluating simple definite integral", "kind": "Video", "slug": "evaluating-simple-definite-integral"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/definite_integrals/area-between-a-curve-and-an-axis/", "id": "area-between-a-curve-and-an-axis", "title": "Area between a curve and an axis", "slug": "area-between-a-curve-and-an-axis", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/definite_integrals/definite-integrals-and-negative-area/", "id": "MM0FTzvedH4", "title": "Definite integrals and negative area", "kind": "Video", "slug": "definite-integrals-and-negative-area"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/definite_integrals/evaluating-definite-integrals/", "id": "evaluating-definite-integrals", "title": "Evaluating definite integrals", "description": "Evaluating definite integrals using the fundamental theorem of calculus", "slug": "evaluating-definite-integrals", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Until now, we have seen definite integrals as the area under a curve. We've approximated this area with reactangles using Riemann sums. We also realized that we could potentially find the exact area if we take the limit as we approach having an infinite, infinitely thin rectangles. But is there an easier way to evaluate an integral? Even more, does this somehow connect to everything we know about the derivative and differential calculus? Hold on to your seats, because everything is about to come together!", "node_slug": "definite_integrals", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/indefinite-definite-integrals/definite_integrals", "extended_slug": "math/integral-calculus/indefinite-definite-integrals/definite_integrals", "kind": "Topic", "slug": "definite_integrals"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/indefinite-definite-integrals/improper-integrals-tutorial/", "id": "improper-integrals-tutorial", "hide": false, "title": "Improper integrals", "child_data": [{"kind": "Video", "id": "1377828561"}, {"kind": "Video", "id": "1378097320"}, {"kind": "Video", "id": "1378156106"}, {"kind": "Exercise", "id": "x702b8c55"}], "children": [{"path": "khan/math/integral-calculus/indefinite-definite-integrals/improper-integrals-tutorial/introduction-to-improper-integrals/", "id": "qv7DM5Ph0vU", "title": "Introduction to improper integrals", "kind": "Video", "slug": "introduction-to-improper-integrals"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/improper-integrals-tutorial/improper-integral-with-two-infinite-bounds/", "id": "9JX2s90_RNQ", "title": "Improper integral with two infinite bounds", "kind": "Video", "slug": "improper-integral-with-two-infinite-bounds"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/improper-integrals-tutorial/divergent-improper-integral/", "id": "9VqL6POWIoc", "title": "Divergent improper integral", "kind": "Video", "slug": "divergent-improper-integral"}, {"path": "khan/math/integral-calculus/indefinite-definite-integrals/improper-integrals-tutorial/improper-integrals/", "id": "improper-integrals", "title": "Improper integrals", "slug": "improper-integrals", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Not everything (or everyone) should or could be proper all the time. Same is true for definite integrals. In this tutorial, we'll look at improper integrals--ones where one or both bounds are at infinity! Mind blowing!", "node_slug": "improper-integrals-tutorial", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/indefinite-definite-integrals/improper-integrals-tutorial", "extended_slug": "math/integral-calculus/indefinite-definite-integrals/improper-integrals-tutorial", "kind": "Topic", "slug": "improper-integrals-tutorial"}], "in_knowledge_map": false, "description": "In this topic, we are going to connect the two big ideas in Calculus: instantaneous rate and area under a curve. We'll see that a definite integral can be thought of as an infinite sum of infinitely small things and how this connects to the derivative of a function!", "node_slug": "indefinite-definite-integrals", "render_type": "Topic", "topic_page_url": "/math/integral-calculus/indefinite-definite-integrals", "extended_slug": "math/integral-calculus/indefinite-definite-integrals", "kind": "Topic", "slug": "indefinite-definite-integrals"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/integral-calculus/integration-techniques/", "id": "integration-techniques", "hide": false, "title": "Integration techniques", "child_data": [{"kind": "Topic", "id": "x0a0b42c7"}, {"kind": "Topic", "id": "xcb8f620d"}, {"kind": "Topic", "id": "xfb4dec92"}, {"kind": "Topic", "id": "x39d629f6"}, {"kind": "Topic", "id": "x7f217d54"}, {"kind": "Topic", "id": "xe6475797"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/", "id": "integration_by_parts", "hide": false, "title": "Integration by parts", "child_data": [{"kind": "Video", "id": "1329232699"}, {"kind": "Video", "id": "1329293927"}, {"kind": "Video", "id": "1377705570"}, {"kind": "Video", "id": "1329248194"}, {"kind": "Video", "id": "1369495388"}, {"kind": "Video", "id": "8187414"}, {"kind": "Exercise", "id": "xa2aa80f3"}], "children": [{"path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/deriving-integration-by-parts-formula/", "id": "dh__n9FVKA0", "title": "Deriving integration by parts formula", "kind": "Video", "slug": "deriving-integration-by-parts-formula"}, {"path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/antiderivative-of-xcosx-using-integration-by-parts/", "id": "bZ8YAHDTFJ8", "title": "Antiderivative of xcosx using integration by parts", "kind": "Video", "slug": "antiderivative-of-xcosx-using-integration-by-parts"}, {"path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/integral-of-ln-x/", "id": "iw5eLJV0Sj4", "title": "Integral of ln x", "kind": "Video", "slug": "integral-of-ln-x"}, {"path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/integration-by-parts-twice-for-antiderivative-of-x-2-e-x/", "id": "n-iEqLhGfd4", "title": "Integration by parts twice for antiderivative of (x^2)(e^x)", "kind": "Video", "slug": "integration-by-parts-twice-for-antiderivative-of-x-2-e-x"}, {"path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/integration-by-parts-of-e-x-cos-x-1/", "id": "LJqNdG6Y2cM", "title": "Integration by parts of (e^x)(cos x)", "kind": "Video", "slug": "integration-by-parts-of-e-x-cos-x-1"}, {"path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/periodic-definite-integral/", "id": "CZdziIlYIfI", "title": "Challenging definite integration", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 52 Periodic Definite Integral. The second term at about minute 14 should have a positive sign. Luckily, it doesn't effect the final answer!", "slug": "periodic-definite-integral"}, {"path": "khan/math/integral-calculus/integration-techniques/integration_by_parts/integration-by-parts/", "id": "integration-by-parts", "title": "Integration by parts", "slug": "integration-by-parts", "kind": "Exercise"}], "in_knowledge_map": false, "description": "When we wanted to take the derivative of f(x)g(x) in differential calculus, we used the product rule. In this tutorial, we use the product rule to derive a powerful way to take the anti-derivative of a class of functions--integration by parts.", "node_slug": "integration_by_parts", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/integration-techniques/integration_by_parts", "extended_slug": "math/integral-calculus/integration-techniques/integration_by_parts", "kind": "Topic", "slug": "integration_by_parts"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/integration-techniques/u_substitution/", "id": "u_substitution", "hide": false, "title": "u-substitution", "child_data": [{"kind": "Video", "id": "1254417751"}, {"kind": "Video", "id": "1254490089"}, {"kind": "Video", "id": "1254165861"}, {"kind": "Video", "id": "1254468209"}, {"kind": "Video", "id": "xadef2972"}, {"kind": "Video", "id": "24306"}, {"kind": "Video", "id": "1254533049"}, {"kind": "Video", "id": "1254393002"}, {"kind": "Video", "id": "1254240553"}, {"kind": "Exercise", "id": "xb61a6762"}], "children": [{"path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution/", "id": "b76wePnIBdU", "title": "u-substitution", "kind": "Video", "description": "Using u-substitution to find the anti-derivative of a function. Seeing that u-substitution is the inverse of the chain rule.", "slug": "u-substitution"}, {"path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-example-2/", "id": "Zp5z0wa0kgo", "title": "u-substitution example 2", "kind": "Video", "description": "Another example of using u-subsitution", "slug": "u-substitution-example-2"}, {"path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-example-3/", "id": "oqCfqIcbE10", "title": "u-substitution example 3", "kind": "Video", "description": "Manipulating the expression to make u-substitution a little more obvious.", "slug": "u-substitution-example-3"}, {"path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-with-ln-x/", "id": "OLO64d4Y1qI", "title": "u-substitution with ln(x)", "kind": "Video", "description": "Doing u-substitution with ln(x)", "slug": "u-substitution-with-ln-x"}, {"path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-exponential/", "id": "1ct7LUx23io", "title": "u-substitution with exponential function", "kind": "Video", "slug": "u-substitution-exponential"}, {"path": "khan/math/integral-calculus/integration-techniques/u_substitution/2-ln-x-x-antiderivative-example/", "id": "C5Lbjbyr1t4", "title": "(2^(ln x))/x antiderivative example", "kind": "Video", "description": "Finding \u00a0\u222b(2^ln x)/x dx", "slug": "2-ln-x-x-antiderivative-example"}, {"path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-and-back-substitution/", "id": "J-NC1M6obKo", "title": "u-substitution and back substitution", "kind": "Video", "description": "Using u-substitution and \"back substituting\" for x to simplify an expression", "slug": "u-substitution-and-back-substitution"}, {"path": "khan/math/integral-calculus/integration-techniques/u_substitution/u-substitution-with-definite-integral/", "id": "7hCsQOKOYS8", "title": "u-substitution with definite integral", "kind": "Video", "description": "Example of using u-substitution to evaluate a definite integral", "slug": "u-substitution-with-definite-integral"}, {"path": "khan/math/integral-calculus/integration-techniques/u_substitution/doing-u-substitution-twice-second-time-with-w/", "id": "ShpI3gPgLBA", "title": "Doing u-substitution twice (second time with w)", "kind": "Video", "description": "Example where we do substitution twice to get the integral into a reasonable form", "slug": "doing-u-substitution-twice-second-time-with-w"}, {"path": "khan/math/integral-calculus/integration-techniques/u_substitution/integration-by-u-substitution/", "id": "integration-by-u-substitution", "title": "Integration by u-substitution", "slug": "integration-by-u-substitution", "kind": "Exercise"}], "in_knowledge_map": false, "description": "U-substitution is a must-have tool for any integrating arsenal (tools aren't normally put in arsenals, but that sounds better than toolkit). It is essentially the reverse chain rule. U-substitution is very useful for any integral where an expression is of the form g(f(x))f'(x)(and a few other cases). Over time, you'll be able to do these in your head without necessarily even explicitly substituting. \n\nWhy the letter \"u\"? Well, it could have been anything, but this is the convention. I guess why not the letter \"u\" :)", "node_slug": "u_substitution", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/integration-techniques/u_substitution", "extended_slug": "math/integral-calculus/integration-techniques/u_substitution", "kind": "Topic", "slug": "u_substitution"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/integration-techniques/reverse-chain-rule/", "id": "reverse-chain-rule", "hide": false, "title": "Reverse chain rule", "child_data": [{"kind": "Video", "id": "x2b69f288"}, {"kind": "Video", "id": "x2388f1d6"}, {"kind": "Video", "id": "x04db429e"}, {"kind": "Exercise", "id": "xb8797277"}], "children": [{"path": "khan/math/integral-calculus/integration-techniques/reverse-chain-rule/reverse-chain-rule-introduction/", "id": "X36GTLhw3Gw", "title": "Reverse chain rule introduction", "kind": "Video", "slug": "reverse-chain-rule-introduction"}, {"path": "khan/math/integral-calculus/integration-techniques/reverse-chain-rule/reverse-chain-rule-example/", "id": "7FQWBCeVIJM", "title": "Reverse chain rule example", "kind": "Video", "slug": "reverse-chain-rule-example"}, {"path": "khan/math/integral-calculus/integration-techniques/reverse-chain-rule/integral-of-tan-x/", "id": "gflKYcGG6hc", "title": "Integral of tan x", "kind": "Video", "slug": "integral-of-tan-x"}, {"path": "khan/math/integral-calculus/integration-techniques/reverse-chain-rule/integration-by-the-reverse-chain-rule/", "id": "integration-by-the-reverse-chain-rule", "title": "Integration by the reverse chain rule", "slug": "integration-by-the-reverse-chain-rule", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The Chain Rule tells us that derivative of g(f(x)) = g'(f(x))f'(x). You already knew this.\nBut what about going the other way around? What happens if you want to integrate g'(f(x))f'(x)? Well, that's what the \"reverse chain rule\" is for. As you can see, a lot of integrals you'll run into can be solved this way. It is also another way of doing u-substitution without having to substitute (so it is faster)!", "node_slug": "reverse-chain-rule", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/integration-techniques/reverse-chain-rule", "extended_slug": "math/integral-calculus/integration-techniques/reverse-chain-rule", "kind": "Topic", "slug": "reverse-chain-rule"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/integration-techniques/integration-using-trig-identities/", "id": "integration-using-trig-identities", "hide": false, "title": "Integration using trigonometric identities", "child_data": [{"kind": "Video", "id": "xc397250c"}, {"kind": "Video", "id": "x6b973043"}, {"kind": "Video", "id": "xc716abcc"}, {"kind": "Exercise", "id": "x79e27c26"}], "children": [{"path": "khan/math/integral-calculus/integration-techniques/integration-using-trig-identities/using-trig-identity-to-use-u-substitution/", "id": "rElAJA9GyL4", "title": "Using trig identity to use u substitution", "kind": "Video", "slug": "using-trig-identity-to-use-u-substitution"}, {"path": "khan/math/integral-calculus/integration-techniques/integration-using-trig-identities/integral-of-odd-powered-trig-function-with-u-substitution/", "id": "xSeYS3V5di8", "title": "Integral of odd powered trig function with u substitution", "kind": "Video", "slug": "integral-of-odd-powered-trig-function-with-u-substitution"}, {"path": "khan/math/integral-calculus/integration-techniques/integration-using-trig-identities/trig-identies-for-trig-integral/", "id": "n34jx1FIN8M", "title": "Trig identities for trig integral", "kind": "Video", "slug": "trig-identies-for-trig-integral"}, {"path": "khan/math/integral-calculus/integration-techniques/integration-using-trig-identities/integration-using-trigonometric-identities/", "id": "integration-using-trigonometric-identities", "title": "Integration using trigonometric identities", "slug": "integration-using-trigonometric-identities", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You will occasionally encounter integrals in life that involve products of exponents of trig functions. In this tutorial, you will see examples of using trigonometric identities to get these types of integrals into a form that you can actually integrate (and you'll get some practice doing it as well)!", "node_slug": "integration-using-trig-identities", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/integration-techniques/integration-using-trig-identities", "extended_slug": "math/integral-calculus/integration-techniques/integration-using-trig-identities", "kind": "Topic", "slug": "integration-using-trig-identities"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/integration-techniques/trig_substitution/", "id": "trig_substitution", "hide": false, "title": "Trigonometric substitution", "child_data": [{"kind": "Video", "id": "x7161c395"}, {"kind": "Video", "id": "1373246393"}, {"kind": "Video", "id": "24208"}, {"kind": "Video", "id": "1373141693"}, {"kind": "Video", "id": "1373336307"}, {"kind": "Video", "id": "1373225524"}, {"kind": "Video", "id": "24210"}, {"kind": "Video", "id": "24212"}, {"kind": "Exercise", "id": "x61853ee9"}], "children": [{"path": "khan/math/integral-calculus/integration-techniques/trig_substitution/introduction-to-trigonometric-substitution/", "id": "EV5dhv0A2wU", "title": "Introduction to trigonometric substitution", "kind": "Video", "description": "Introduction to trigonometric substitution", "slug": "introduction-to-trigonometric-substitution"}, {"path": "khan/math/integral-calculus/integration-techniques/trig_substitution/another-substitution-with-x-sin-theta/", "id": "8Yl_u_Otcjg", "title": "Another substitution with x=sin (theta)", "kind": "Video", "slug": "another-substitution-with-x-sin-theta"}, {"path": "khan/math/integral-calculus/integration-techniques/trig_substitution/integrals-trig-substitution-1/", "id": "n4EK92CSuBE", "title": "Integrals: Trig substitution 1", "kind": "Video", "description": "Example of using trig substitution to solve an indefinite integral", "slug": "integrals-trig-substitution-1"}, {"path": "khan/math/integral-calculus/integration-techniques/trig_substitution/trig-and-u-substitution-together-part-1/", "id": "nMrJ6nbOQhQ", "title": "Trig and u substitution together (part 1)", "kind": "Video", "slug": "trig-and-u-substitution-together-part-1"}, {"path": "khan/math/integral-calculus/integration-techniques/trig_substitution/trig-and-u-substitution-together-part-2/", "id": "WAoaBTWKLoI", "title": "Trig and u substitution together (part 2)", "kind": "Video", "slug": "trig-and-u-substitution-together-part-2"}, {"path": "khan/math/integral-calculus/integration-techniques/trig_substitution/trig-substitution-with-tangent/", "id": "CYjAgOTVfZk", "title": "Trig substitution with tangent", "kind": "Video", "slug": "trig-substitution-with-tangent"}, {"path": "khan/math/integral-calculus/integration-techniques/trig_substitution/integrals-trig-substitution-2/", "id": "fD7MbnXbTls", "title": "Integrals: Trig substitution 2", "kind": "Video", "description": "Another example of finding an anti-derivative using trigonometric substitution", "slug": "integrals-trig-substitution-2"}, {"path": "khan/math/integral-calculus/integration-techniques/trig_substitution/integrals-trig-substitution-3-long-problem/", "id": "sw2p2tUIFpc", "title": "Integrals: Trig substitution 3 (long problem)", "kind": "Video", "description": "Example using trig substitution (and trig identities) to solve an integral.", "slug": "integrals-trig-substitution-3-long-problem"}, {"path": "khan/math/integral-calculus/integration-techniques/trig_substitution/integration-using-trigonometric-substitution/", "id": "integration-using-trigonometric-substitution", "title": "Integration using trigonometric substitution", "description": "Integration using trigonometric identities", "slug": "integration-using-trigonometric-substitution", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We will now do another substitution technique (the other was u-substitution) where we substitute variables with trig functions. This allows us to leverage some trigonometric identities to simplify the expression into one that it is easier to take the anti-derivative of.", "node_slug": "trig_substitution", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/integration-techniques/trig_substitution", "extended_slug": "math/integral-calculus/integration-techniques/trig_substitution", "kind": "Topic", "slug": "trig_substitution"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/integration-techniques/integrate-partial-fraction-expan/", "id": "integrate-partial-fraction-expan", "hide": false, "title": "Division and partial fraction expansion", "child_data": [{"kind": "Video", "id": "xcf1d5a02"}, {"kind": "Video", "id": "xa5f8f98b"}, {"kind": "Exercise", "id": "x43fdb395"}], "children": [{"path": "khan/math/integral-calculus/integration-techniques/integrate-partial-fraction-expan/partial-fraction-expansion-to-integrate/", "id": "7IkufOBIw5g", "title": "Partial fraction expansion to evaluate integral", "kind": "Video", "slug": "partial-fraction-expansion-to-integrate"}, {"path": "khan/math/integral-calculus/integration-techniques/integrate-partial-fraction-expan/integral-partial-fraction/", "id": "5j81gyHn9i0", "title": "Dividing expressions to evaluate integral", "kind": "Video", "slug": "integral-partial-fraction"}, {"path": "khan/math/integral-calculus/integration-techniques/integrate-partial-fraction-expan/integration-of-rational-functions-by-division-and-partial-fractions/", "id": "integration-of-rational-functions-by-division-and-partial-fractions", "title": "Integration of rational functions by division and partial fractions", "slug": "integration-of-rational-functions-by-division-and-partial-fractions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "When you're trying to integrate a rational expression, the techniques of partial fraction expansion and algebraic long division can be *very* useful.", "node_slug": "integrate-partial-fraction-expan", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/integration-techniques/integrate-partial-fraction-expan", "extended_slug": "math/integral-calculus/integration-techniques/integrate-partial-fraction-expan", "kind": "Topic", "slug": "integrate-partial-fraction-expan"}], "in_knowledge_map": false, "description": "We know that a definite integral can represent area and we've seen how this is connected to the idea of an anti-derivative through the Fundamental Theorem of Calculus (which is why we also use the integration symbol for anti-derivatives as well). Now, we'll build out our toolkit for evaluating integrals, both definite and indefinite!", "node_slug": "integration-techniques", "render_type": "Topic", "topic_page_url": "/math/integral-calculus/integration-techniques", "extended_slug": "math/integral-calculus/integration-techniques", "kind": "Topic", "slug": "integration-techniques"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/integral-calculus/solid_revolution_topic/", "id": "solid_revolution_topic", "hide": false, "title": "Integration applications", "child_data": [{"kind": "Topic", "id": "xa07feb89"}, {"kind": "Topic", "id": "x9a5a30fc"}, {"kind": "Topic", "id": "xbdacf26a"}, {"kind": "Topic", "id": "x37fccb6a"}, {"kind": "Topic", "id": "x4e18632e"}, {"kind": "Topic", "id": "x437a1488"}, {"kind": "Topic", "id": "xd628396e"}, {"kind": "Topic", "id": "x4a435e40"}, {"kind": "Topic", "id": "xc5274ca7"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/solid_revolution_topic/area-between-curves/", "id": "area-between-curves", "hide": false, "title": "Area between curves", "child_data": [{"kind": "Video", "id": "1337260457"}, {"kind": "Video", "id": "1337371091"}, {"kind": "Exercise", "id": "xedc65086"}], "children": [{"path": "khan/math/integral-calculus/solid_revolution_topic/area-between-curves/area-between-curves/", "id": "4bZyfvKazzQ", "title": "Area between curves", "kind": "Video", "slug": "area-between-curves"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/area-between-curves/area-between-curves-with-multiple-boundaries/", "id": "LbTH7MGMNjk", "title": "Area between curves with multiple boundaries", "kind": "Video", "slug": "area-between-curves-with-multiple-boundaries"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/area-between-curves/area-between-two-curves/", "id": "area-between-two-curves", "title": "Area between two curves", "slug": "area-between-two-curves", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "area-between-curves", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/solid_revolution_topic/area-between-curves", "extended_slug": "math/integral-calculus/solid_revolution_topic/area-between-curves", "kind": "Topic", "slug": "area-between-curves"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/solid_revolution_topic/function-average-value/", "id": "function-average-value", "hide": false, "title": "Average value of a function", "child_data": [{"kind": "Video", "id": "x32f2123f"}, {"kind": "Video", "id": "x24937653"}, {"kind": "Video", "id": "xeac69708"}, {"kind": "Video", "id": "x5ca5c5c1"}, {"kind": "Exercise", "id": "xc4968752"}], "children": [{"path": "khan/math/integral-calculus/solid_revolution_topic/function-average-value/average-function-value-closed-interval/", "id": "NCF4m8BDs7w", "title": "Average value of a function over a closed interval", "kind": "Video", "slug": "average-function-value-closed-interval"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/function-average-value/calculating-function-average-over-interval/", "id": "0rzL08BHr5c", "title": "Calculating average value of function over interval", "kind": "Video", "slug": "calculating-function-average-over-interval"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/function-average-value/average-acceleration-over-interval/", "id": "wdAgEzdkFZI", "title": "Average acceleration over interval", "kind": "Video", "slug": "average-acceleration-over-interval"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/function-average-value/mean-value-theorem-integrals/", "id": "59UeshgSuEE", "title": "Mean value theorem for integrals", "kind": "Video", "slug": "mean-value-theorem-integrals"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/function-average-value/average-value-of-a-function/", "id": "average-value-of-a-function", "title": "Average value of a function", "slug": "average-value-of-a-function", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We don't need calculus to figure out the average value of a linear function over an interval, but what about non-linear functions? Luckily, integral calculus comes to the rescue here. In this tutorial, we'll understand what \"average value\" of a function over an interval means. We'll also connect that notion to the Mean Value Theorem we first learned in differential calculus.", "node_slug": "function-average-value", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/solid_revolution_topic/function-average-value", "extended_slug": "math/integral-calculus/solid_revolution_topic/function-average-value", "kind": "Topic", "slug": "function-average-value"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/solid_revolution_topic/arc-length/", "id": "arc-length", "hide": false, "title": "Arc length", "child_data": [{"kind": "Video", "id": "x28571cbc"}, {"kind": "Video", "id": "x35f6ea19"}, {"kind": "Video", "id": "x985d984a"}, {"kind": "Exercise", "id": "x4026f132"}], "children": [{"path": "khan/math/integral-calculus/solid_revolution_topic/arc-length/arc-length-formula/", "id": "8Y-snjheI9M", "title": "Non rigorous justification for arc length formula", "kind": "Video", "slug": "arc-length-formula"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/arc-length/arc-length-example/", "id": "OhISsmqv4_8", "title": "Arc length integration example", "kind": "Video", "slug": "arc-length-example"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/arc-length/arc-length-example-2/", "id": "MtRXjXdXDow", "title": "Another arc length integration example", "kind": "Video", "slug": "arc-length-example-2"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/arc-length/arc-length-of-functions-in-one-variable/", "id": "arc-length-of-functions-in-one-variable", "title": "Arc length of functions in one variable", "slug": "arc-length-of-functions-in-one-variable", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We'll now use integration to find the arc length of a curve. As we'll see, it is based on the same idea of summing up an infinite number of infinitely small line segments.", "node_slug": "arc-length", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/solid_revolution_topic/arc-length", "extended_slug": "math/integral-calculus/solid_revolution_topic/arc-length", "kind": "Topic", "slug": "arc-length"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/solid_revolution_topic/volume-solids-known-cross-sectio/", "id": "volume-solids-known-cross-sectio", "hide": false, "title": "Volume of solids with known cross sections", "child_data": [{"kind": "Video", "id": "x50d51a99"}, {"kind": "Video", "id": "x2605e92e"}, {"kind": "Exercise", "id": "x8fdd704c"}], "children": [{"path": "khan/math/integral-calculus/solid_revolution_topic/volume-solids-known-cross-sectio/volume-solid-semicircle-cross-section/", "id": "tf4C8x8e7HQ", "title": "Semi circle cross sections with triangular base", "kind": "Video", "slug": "volume-solid-semicircle-cross-section"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/volume-solids-known-cross-sectio/volume-triangular-cross-section/", "id": "S-agS4YaxxU", "title": "Volume of solid with known cross section", "kind": "Video", "slug": "volume-triangular-cross-section"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/volume-solids-known-cross-sectio/volumes-of-solids-of-known-cross-section/", "id": "volumes-of-solids-of-known-cross-section", "title": "Volumes of solids of known cross-section", "slug": "volumes-of-solids-of-known-cross-section", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We will now leverage the definite integral to find volumes of figures where we know what the cross sections look like. It is surprisingly fun.", "node_slug": "volume-solids-known-cross-sectio", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/solid_revolution_topic/volume-solids-known-cross-sectio", "extended_slug": "math/integral-calculus/solid_revolution_topic/volume-solids-known-cross-sectio", "kind": "Topic", "slug": "volume-solids-known-cross-sectio"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/", "id": "disc-method", "hide": false, "title": "Solids of revolution - disc method", "child_data": [{"kind": "Video", "id": "1276987869"}, {"kind": "Video", "id": "1276878010"}, {"kind": "Video", "id": "1277026678"}, {"kind": "Video", "id": "1277082263"}, {"kind": "Video", "id": "1276911918"}, {"kind": "Video", "id": "1276975478"}, {"kind": "Video", "id": "1277007629"}, {"kind": "Video", "id": "1276843891"}, {"kind": "Video", "id": "1276946626"}, {"kind": "Video", "id": "1277077144"}, {"kind": "Video", "id": "1278890062"}, {"kind": "Video", "id": "1278699793"}, {"kind": "Exercise", "id": "x1c50b047"}], "children": [{"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/disk-method-around-x-axis/", "id": "btGaOTXxXs8", "title": "Disk method around x-axis", "kind": "Video", "description": "Finding the solid of revolution (constructed by revolving around the x-axis) using the disc method.", "slug": "disk-method-around-x-axis"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/generalizing-disc-method-around-x-axis/", "id": "vmS3cTaxKdA", "title": "Generalizing disc method around x-axis", "kind": "Video", "description": "Generalizing what we did in the last video for f(x) to get the \"formula\" for using the disc method around the x-axis", "slug": "generalizing-disc-method-around-x-axis"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/disc-method-around-y-axis/", "id": "43AS7bPUORc", "title": "Disc method around y-axis", "kind": "Video", "description": "Finding the volume of a figure that is rotated around the y-axis using the disc method", "slug": "disc-method-around-y-axis"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/disc-method-washer-method-for-rotation-around-x-axis/", "id": "vhMl755vR5Q", "title": "Disc method (washer method) for rotation around x-axis", "kind": "Video", "description": "Finding the volume of a solid of revolution that is defined between two functions", "slug": "disc-method-washer-method-for-rotation-around-x-axis"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/generalizing-the-washer-method/", "id": "Thvc2s9aUP4", "title": "Generalizing the washer method", "kind": "Video", "description": "Looking at the example from the last video in a more generalized way", "slug": "generalizing-the-washer-method"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/disc-method-rotation-around-horizontal-line/", "id": "XdzcU5JbVcA", "title": "Disc method rotation around horizontal line", "kind": "Video", "description": "Solid of revolution constructing by rotating around line that is not an axis", "slug": "disc-method-rotation-around-horizontal-line"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/washer-method-rotating-around-non-axis/", "id": "OFNGpKGg9IQ", "title": "Washer method rotating around non-axis", "kind": "Video", "description": "Washer method when rotating around a horizontal line that is not the x-axis", "slug": "washer-method-rotating-around-non-axis"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/part-2-of-washer-for-not-axis-rotation/", "id": "LKzpw_HUKNQ", "title": "Part 2 of washer for non axis rotation", "kind": "Video", "description": "Doing some hairy algebra and arithmetic to evaluate the definite integral from the last video", "slug": "part-2-of-washer-for-not-axis-rotation"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/disc-method-rotating-around-vertical-line/", "id": "jxf7XqvZWWg", "title": "Disc method rotating around vertical line", "kind": "Video", "description": "Volume of solid created by rotating around vertical line that is not the y-axis using the disc method.", "slug": "disc-method-rotating-around-vertical-line"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/calculating-integral-disc-method-around-vertical-line/", "id": "eLdhifUUMmk", "title": "Calculating integral disc method around vertical line", "kind": "Video", "description": "Let's calculate the integral from the last video.", "slug": "calculating-integral-disc-method-around-vertical-line"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/washer-or-ring-method-for-vertical-line-rotation/", "id": "WAPZihVUmzE", "title": "Washer or ring method for vertical line rotation", "kind": "Video", "description": "Setting up the definite integral for the volume of a solid of revolution around a vertical line using the \"washer\" or \"ring\" method.", "slug": "washer-or-ring-method-for-vertical-line-rotation"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/evaluating-integral-for-washer-method-around-vertical-line/", "id": "i-Rb4_n929k", "title": "Evaluating integral for washer method around vertical line", "kind": "Video", "description": "Evaluating integral set up in the last video using washer method.", "slug": "evaluating-integral-for-washer-method-around-vertical-line"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/disc-method/volumes-of-solids-of-revolution-discs-and-washers/", "id": "volumes-of-solids-of-revolution--discs-and-washers", "title": "Volumes of solids of revolution, discs, and washers", "slug": "volumes-of-solids-of-revolution-discs-and-washers", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You know how to use definite integrals to find areas under curves. We now take that idea for \"spin\" by thinking about the volumes of things created when you rotate functions around various lines. \n\nThis tutorial focuses on the \"disc method\" and the \"washer method\" for these types of problems.", "node_slug": "disc-method", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/solid_revolution_topic/disc-method", "extended_slug": "math/integral-calculus/solid_revolution_topic/disc-method", "kind": "Topic", "slug": "disc-method"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/", "id": "shell-method", "hide": false, "title": "Solids of revolution - shell method", "child_data": [{"kind": "Video", "id": "1278719875"}, {"kind": "Video", "id": "1278893056"}, {"kind": "Video", "id": "1278618852"}, {"kind": "Video", "id": "1279652914"}, {"kind": "Video", "id": "1279716372"}, {"kind": "Video", "id": "1279685406"}, {"kind": "Video", "id": "1279735749"}, {"kind": "Exercise", "id": "x0768620f"}], "children": [{"path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/shell-method-for-rotating-around-vertical-line/", "id": "6Ozz3J-LRrY", "title": "Shell method for rotating around vertical line", "kind": "Video", "description": "Introducing the shell method for rotation around a vertical line.", "slug": "shell-method-for-rotating-around-vertical-line"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/evaluating-integral-for-shell-method-example/", "id": "5ZGCqKAl_CA", "title": "Evaluating integral for shell method example", "kind": "Video", "description": "Evaluating the definite integral set up using the shell method", "slug": "evaluating-integral-for-shell-method-example"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/shell-method-for-rotating-around-horizontal-line/", "id": "R-Qu3QWOEiA", "title": "Shell method for rotating around horizontal line", "kind": "Video", "description": "Example showing how to find the volume of a solid of revolution (constructed by rotating around the x-axis) using the shell method (this could have been done with the disk method as well).", "slug": "shell-method-for-rotating-around-horizontal-line"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/shell-method-with-two-functions-of-x/", "id": "SfWrVNyP9E8", "title": "Shell method with two functions of x", "kind": "Video", "description": "Using the shell method to rotate around a vertical line.", "slug": "shell-method-with-two-functions-of-x"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/calculating-integral-with-shell-method/", "id": "16aKF_eDGdw", "title": "Calculating integral with shell method", "kind": "Video", "description": "Evaluating integral set up with shell method for two functions.", "slug": "calculating-integral-with-shell-method"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/shell-method-with-two-functions-of-y/", "id": "OelluIKIkCY", "title": "Shell method with two functions of y", "kind": "Video", "slug": "shell-method-with-two-functions-of-y"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/part-2-of-shell-method-with-2-functions-of-y/", "id": "zg3-miF4qeg", "title": "Part 2 of shell method with 2 functions of y", "kind": "Video", "slug": "part-2-of-shell-method-with-2-functions-of-y"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/shell-method/volumes-of-solids-of-revolution-by-shells/", "id": "volumes-of-solids-of-revolution-by-shells", "title": "Volumes of solids of revolution by shells", "description": "Volumes of solids of revolution, shell method", "slug": "volumes-of-solids-of-revolution-by-shells", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You want to rotate a function around a vertical line, but do all your integrating in terms of x and f(x), then the shell method is your new friend. It is similarly fantastic when you want to rotate around a horizontal line but integrate in terms of y.", "node_slug": "shell-method", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/solid_revolution_topic/shell-method", "extended_slug": "math/integral-calculus/solid_revolution_topic/shell-method", "kind": "Topic", "slug": "shell-method"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/", "id": "solid_of_revolution", "hide": false, "title": "Solid of revolution volume", "child_data": [{"kind": "Video", "id": "24216"}, {"kind": "Video", "id": "24218"}, {"kind": "Video", "id": "24220"}, {"kind": "Video", "id": "24222"}, {"kind": "Video", "id": "24224"}, {"kind": "Video", "id": "24226"}, {"kind": "Video", "id": "24228"}, {"kind": "Video", "id": "24230"}], "children": [{"path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-1/", "id": "R_aqSL-q6_8", "title": "Disc method: Function rotated about x-axis", "kind": "Video", "description": "Figuring out the volume of a function rotated about the x-axis.", "slug": "solid-of-revolution-part-1"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-2/", "id": "iUzfsUOl3-A", "title": "Disc method (rotating f(x) about x axis)", "kind": "Video", "description": "The volume of y=sqrt(x) between x=0 and x=1 rotated around x-axis", "slug": "solid-of-revolution-part-2"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-3/", "id": "tqfU9mC2yFU", "title": "Volume of a sphere", "kind": "Video", "description": "Figuring out the equation for the volume of a sphere.", "slug": "solid-of-revolution-part-3"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-4/", "id": "OtmjNuiTHp0", "title": "Disc method with outer and inner function boundaries", "kind": "Video", "description": "More volumes around the x-axis.", "slug": "solid-of-revolution-part-4"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-5/", "id": "NIdqkwocNuE", "title": "Shell method to rotate around y-axis", "kind": "Video", "description": "Use the \"shell method\" to rotate about the y-axis", "slug": "solid-of-revolution-part-5"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-6/", "id": "F2psxMnGdUw", "title": "Disc method: Rotating x = f(y) around the y-axis", "kind": "Video", "description": "Using the disk method around the y-axis.", "slug": "solid-of-revolution-part-6"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-7/", "id": "IZ8W-h764Cc", "title": "Shell method around a non-axis line", "kind": "Video", "description": "Taking the revolution around something other than one of the axes.", "slug": "solid-of-revolution-part-7"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/solid_of_revolution/solid-of-revolution-part-8/", "id": "4Flj9plmKGQ", "title": "Shell method around a non-axis line 2", "kind": "Video", "description": "The last part of the problem in part 7", "slug": "solid-of-revolution-part-8"}], "in_knowledge_map": false, "description": "Using definite integration, we know how to find the area under a curve. But what about the volume of the 3-D shape generated by rotating a section of the curve about one of the axes (or any horizontal or vertical line for that matter). This in an older tutorial that is now covered in other tutorials.\n\nThis tutorial will give you a powerful tool and stretch your powers of 3-D visualization!", "node_slug": "solid_of_revolution", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/solid_revolution_topic/solid_of_revolution", "extended_slug": "math/integral-calculus/solid_revolution_topic/solid_of_revolution", "kind": "Topic", "slug": "solid_of_revolution"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/solid_revolution_topic/area-polar-graphs/", "id": "area-polar-graphs", "hide": false, "title": "Area defined by polar graphs", "child_data": [{"kind": "Video", "id": "xb44c8c08"}, {"kind": "Video", "id": "x8a47b52d"}, {"kind": "Video", "id": "xd198d3cc"}, {"kind": "Video", "id": "xb21bd894"}, {"kind": "Exercise", "id": "x974fecd6"}], "children": [{"path": "khan/math/integral-calculus/solid_revolution_topic/area-polar-graphs/formula-area-polar-graph/", "id": "qVn_Lfec-Ac", "title": "Area enclosed by polar graph formula intuition", "kind": "Video", "slug": "formula-area-polar-graph"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/area-polar-graphs/cardioid-area/", "id": "-cR6FzM1zNE", "title": "Area enclosed by cardioid", "kind": "Video", "slug": "cardioid-area"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/area-polar-graphs/area-defined-by-two-polar-graphs/", "id": "KwR_ysrv3sg", "title": "Area between two polar graphs", "kind": "Video", "slug": "area-defined-by-two-polar-graphs"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/area-polar-graphs/calculator-integral/", "id": "4tWFdI7DkJ4", "title": "Evaluating definite integral with calculator", "kind": "Video", "slug": "calculator-integral"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/area-polar-graphs/area-enclosed-by-polar-graphs/", "id": "area-enclosed-by-polar-graphs", "title": "Area enclosed by polar graphs", "slug": "area-enclosed-by-polar-graphs", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We'll now use the power of the integral to find areas defined by polar graphs!", "node_slug": "area-polar-graphs", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/solid_revolution_topic/area-polar-graphs", "extended_slug": "math/integral-calculus/solid_revolution_topic/area-polar-graphs", "kind": "Topic", "slug": "area-polar-graphs"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/solid_revolution_topic/arc-length-polar-graphs/", "id": "arc-length-polar-graphs", "hide": false, "title": "Arc length of polar graphs", "child_data": [{"kind": "Video", "id": "x307ed42c"}, {"kind": "Video", "id": "x749aa43b"}, {"kind": "Exercise", "id": "x7fccd0c4"}], "children": [{"path": "khan/math/integral-calculus/solid_revolution_topic/arc-length-polar-graphs/polar-arc-length-formula/", "id": "CEPuNmVKnZM", "title": "Justification for polar arc length formula", "kind": "Video", "slug": "polar-arc-length-formula"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/arc-length-polar-graphs/polar-arc-length-example/", "id": "sFlH7V7QDbQ", "title": "Arc length of petal of polar graph", "kind": "Video", "slug": "polar-arc-length-example"}, {"path": "khan/math/integral-calculus/solid_revolution_topic/arc-length-polar-graphs/arc-length-of-polar-curves/", "id": "arc-length-of-polar-curves", "title": "Arc length of polar curves", "slug": "arc-length-of-polar-curves", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You may already be familiar with finding arc length of graphs that are defined in terms of rectangular coordinates. We'll now extend our knowledge of arc length to include polar graphs!", "node_slug": "arc-length-polar-graphs", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/solid_revolution_topic/arc-length-polar-graphs", "extended_slug": "math/integral-calculus/solid_revolution_topic/arc-length-polar-graphs", "kind": "Topic", "slug": "arc-length-polar-graphs"}], "in_knowledge_map": false, "description": "Let's now use our significant arsenal of integration techniques to tackles a wide variety of problems that can be solved through integration!", "node_slug": "solid_revolution_topic", "render_type": "Topic", "topic_page_url": "/math/integral-calculus/solid_revolution_topic", "extended_slug": "math/integral-calculus/solid_revolution_topic", "kind": "Topic", "slug": "solid_revolution_topic"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/", "id": "sequences_series_approx_calc", "hide": false, "title": "Sequences, series, and function approximation", "child_data": [{"kind": "Topic", "id": "x07435c26"}, {"kind": "Topic", "id": "xe8d458e6"}, {"kind": "Topic", "id": "xbbee5e70"}, {"kind": "Topic", "id": "x8c49ced5"}, {"kind": "Topic", "id": "xca2d3b87"}, {"kind": "Topic", "id": "xbfad2acb"}, {"kind": "Topic", "id": "xddd3189f"}, {"kind": "Topic", "id": "x1884cccf"}, {"kind": "Topic", "id": "xae72089f"}, {"kind": "Topic", "id": "xdb9da53e"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/", "id": "calculus-sequences", "hide": false, "title": "Sequences", "child_data": [{"kind": "Video", "id": "1383721311"}, {"kind": "Video", "id": "x49480933"}, {"kind": "Video", "id": "x4ce851ac"}, {"kind": "Exercise", "id": "x44c4dd54"}, {"kind": "Video", "id": "x172ba5d8"}, {"kind": "Exercise", "id": "1383425796"}, {"kind": "Exercise", "id": "1383464822"}], "children": [{"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/explicit-and-recursive-definitions-of-sequences/", "id": "KRFiAlo7t1E", "title": "Introduction to sequences", "kind": "Video", "description": "Sal explains what sequences are and gives examples of different sequences, defined either explicitly or recursively, and discusses different notations for sequences.", "slug": "explicit-and-recursive-definitions-of-sequences"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/terms-explicit-sequence/", "id": "HiY5UElqfhs", "title": "Finding terms of explicitly defined sequence", "kind": "Video", "slug": "terms-explicit-sequence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/term-of-recursive-sequence/", "id": "t96N4zaP-s8", "title": "Finding the 5th term in recursively defined sequence", "kind": "Video", "slug": "term-of-recursive-sequence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/understanding-sequences/", "id": "understanding-sequences", "title": "Understanding sequences", "slug": "understanding-sequences", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/geometric-sequence/", "id": "W2NnNKtquaE", "title": "Geometric sequence or progression", "kind": "Video", "slug": "geometric-sequence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/geometric_sequences_1/", "id": "geometric_sequences_1", "title": "Find the next term of a geometric sequence, given the first few terms", "description": "Solve problems such as:\u00a0The first four terms of a geometric sequence are\u00a064. -32. 16, and -8.\u00a0What is the fifth term in the sequence?", "slug": "geometric_sequences_1", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-sequences/geometric_sequences_2/", "id": "geometric_sequences_2", "title": "Find any term of a geometric sequence, given the formula of the sequence", "description": "Given a geometric sequence, ether in explicit form or in recursive form, find a specific term in the sequence.", "slug": "geometric_sequences_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we'll review what sequences are, associated notation and convergence/divergence of sequences.", "node_slug": "calculus-sequences", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc/calculus-sequences", "extended_slug": "math/integral-calculus/sequences_series_approx_calc/calculus-sequences", "kind": "Topic", "slug": "calculus-sequences"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/seq-conv-diverg/", "id": "seq-conv-diverg", "hide": false, "title": "Sequence convergence and divergence", "child_data": [{"kind": "Video", "id": "1383707269"}, {"kind": "Video", "id": "x1a7b5891"}, {"kind": "Exercise", "id": "x052a02a9"}, {"kind": "Video", "id": "1392656058"}, {"kind": "Video", "id": "1392561319"}], "children": [{"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq-conv-diverg/convergent-and-divergent-sequences/", "id": "lfZGtjSWcQs", "title": "Convergent and divergent sequences", "kind": "Video", "slug": "convergent-and-divergent-sequences"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq-conv-diverg/identifying-sequence-convergence-divergence/", "id": "muqyereWEh4", "title": "Identifying sequence convergence and divergence", "kind": "Video", "slug": "identifying-sequence-convergence-divergence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq-conv-diverg/convergence-and-divergence-of-sequences/", "id": "convergence-and-divergence-of-sequences", "title": "Convergence and divergence of sequences", "slug": "convergence-and-divergence-of-sequences", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq-conv-diverg/definition-of-limit-of-a-sequence-and-sequence-convergence/", "id": "wzw9ll80Zbc", "title": "Definition of limit of a sequence and sequence convergence", "kind": "Video", "slug": "definition-of-limit-of-a-sequence-and-sequence-convergence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq-conv-diverg/proving-a-sequence-converges/", "id": "-XRQovTI04Q", "title": "Proving a sequence converges", "kind": "Video", "slug": "proving-a-sequence-converges"}], "in_knowledge_map": false, "description": "Now that we understand what a sequence is, we're going to think about what happens to the terms of a sequence at infinity (do they approach 0, a finite value, or +- infinity?).", "node_slug": "seq-conv-diverg", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc/seq-conv-diverg", "extended_slug": "math/integral-calculus/sequences_series_approx_calc/seq-conv-diverg", "kind": "Topic", "slug": "seq-conv-diverg"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/", "id": "calculus-series", "hide": false, "title": "Series", "child_data": [{"kind": "Video", "id": "xea358b4a"}, {"kind": "Video", "id": "1393021992"}, {"kind": "Video", "id": "xc5145c94"}, {"kind": "Video", "id": "x1985e33e"}, {"kind": "Video", "id": "1392989924"}, {"kind": "Exercise", "id": "1383472697"}, {"kind": "Video", "id": "xe115b9a9"}, {"kind": "Video", "id": "x4f4861b7"}, {"kind": "Video", "id": "x463bbd8a"}, {"kind": "Video", "id": "x9235e839"}, {"kind": "Video", "id": "x59079628"}, {"kind": "Exercise", "id": "x1264b701"}, {"kind": "Video", "id": "xb8d9548c"}, {"kind": "Video", "id": "xf1ee6394"}, {"kind": "Video", "id": "x6f205945"}, {"kind": "Exercise", "id": "xb5ef4bef"}], "children": [{"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/sigma-notation-sum/", "id": "5jwXThH6fg4", "title": "Sigma notation for sums", "kind": "Video", "slug": "sigma-notation-sum"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/series-as-sum-of-sequence/", "id": "rcRg_gO7-7E", "title": "Series as sum of sequence", "kind": "Video", "slug": "series-as-sum-of-sequence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/writing-series-sigma-notation/", "id": "0DBDuNYsciY", "title": "Writing a series in sigma notation", "kind": "Video", "slug": "writing-series-sigma-notation"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/explicitly-defining-series/", "id": "yvddTWa9ptU", "title": "Explicitly defining a series", "kind": "Video", "slug": "explicitly-defining-series"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/formula-for-arithmetic-series/", "id": "Uy_L8tnihDM", "title": "Formula for arithmetic series", "kind": "Video", "slug": "formula-for-arithmetic-series"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/arithmetic_series/", "id": "arithmetic_series", "title": "Arithmetic series", "description": "Find the sum of the first n terms of an arithmetic sequence.", "slug": "arithmetic_series", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/sum-of-n-squares-1/", "id": "i7iKLZQ-vCk", "title": "Finding the sum of n squares part 1", "kind": "Video", "slug": "sum-of-n-squares-1"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/sum-n-squares-2/", "id": "MkGXR8umLco", "title": "Finding the sum of n squares part 2", "kind": "Video", "slug": "sum-n-squares-2"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/alternate-sum-of-n-squares-formula/", "id": "KvvFTPsZxU4", "title": "Alternate formula for sum of n squares", "kind": "Video", "slug": "alternate-sum-of-n-squares-formula"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/properties-to-find-sum/", "id": "LwhJVURumAA", "title": "Leveraging properties of series to find sum", "kind": "Video", "slug": "properties-to-find-sum"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/partial-sum-notation/", "id": "k9MEOgcc5KY", "title": "Partial sum notation", "kind": "Video", "description": "Partial sum notation", "slug": "partial-sum-notation"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/understanding-series/", "id": "understanding-series", "title": "Understanding series", "slug": "understanding-series", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/infinite-series-as-limit-of-partial-sums/", "id": "bh1UrCGWz1k", "title": "Infinite series as limit of partial sums", "kind": "Video", "description": "Infinite series as limit of partial sums", "slug": "infinite-series-as-limit-of-partial-sums"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/telescoping-series/", "id": "qUNGPqCPzMg", "title": "Partial fraction decomposition to find sum of telescoping series", "kind": "Video", "slug": "telescoping-series"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/divergence-telescoping-series/", "id": "5LMzbgfZ8cA", "title": "Divergence of telescoping series", "kind": "Video", "slug": "divergence-telescoping-series"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/calculus-series/convergence-and-divergence-of-series/", "id": "convergence-and-divergence-of-series", "title": "Convergence and divergence of series", "slug": "convergence-and-divergence-of-series", "kind": "Exercise"}], "in_knowledge_map": false, "description": "You're familiar with sequences and have been eager to sum them up. Well wait no longer! In this tutorial, we'll see that series are just sums of sequences and familiarize ourselves with the notation.", "node_slug": "calculus-series", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc/calculus-series", "extended_slug": "math/integral-calculus/sequences_series_approx_calc/calculus-series", "kind": "Topic", "slug": "calculus-series"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/", "id": "seq_series_review", "hide": false, "title": "Geometric series", "child_data": [{"kind": "Video", "id": "x8bcd35c6"}, {"kind": "Video", "id": "x363f77ba"}, {"kind": "Exercise", "id": "x71fc8537"}, {"kind": "Video", "id": "xc809ee47"}, {"kind": "Video", "id": "x16f67abe"}, {"kind": "Video", "id": "x9a18b2d7"}, {"kind": "Video", "id": "x9a32c336"}, {"kind": "Video", "id": "xb23a1b53"}, {"kind": "Exercise", "id": "x05d70249"}], "children": [{"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/geometric-series-introduction/", "id": "CecgFWTg9pQ", "title": "Geometric series", "kind": "Video", "slug": "geometric-series-introduction"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/geometric-series/", "id": "i8THsl3AYFI", "title": "Formula for a finite geometric series", "kind": "Video", "slug": "geometric-series"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/geometric-series-1/", "id": "geometric-series--1", "title": "Calculating finite geometric series", "slug": "geometric-series-1", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/infinite-geometric-series/", "id": "b-7kCymoUpg", "title": "Sum of an infinite geometric series", "kind": "Video", "slug": "infinite-geometric-series"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/deriving-geometric-series-sum-formula/", "id": "wqnpSzEzq1w", "title": "Another derivation of the sum of an infinite geometric series", "kind": "Video", "slug": "deriving-geometric-series-sum-formula"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/geometric-series-convergence-divergence/", "id": "KNrEAJeRIdo", "title": "Geometric series convergence and divergence examples", "kind": "Video", "slug": "geometric-series-convergence-divergence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/repeating-decimal-geometric-series/", "id": "2BgWWsypzLA", "title": "Repeating decimal as infinite geometric series", "kind": "Video", "slug": "repeating-decimal-geometric-series"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/bouncing-ball-distance/", "id": "tqTJZEglrvc", "title": "Vertical distance of bouncing ball", "kind": "Video", "slug": "bouncing-ball-distance"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/seq_series_review/geometric-series-of-constants/", "id": "geometric-series-of-constants", "title": "Infinite geometric series", "description": "Applying the formula for an infinite geometric series", "slug": "geometric-series-of-constants", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Whether you are computing mortgage payments or calculating the distance traveled by a bouncing ball, geometric series show up in life far more than you imagine. This tutorial will review all the important concepts and more!", "node_slug": "seq_series_review", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc/seq_series_review", "extended_slug": "math/integral-calculus/sequences_series_approx_calc/seq_series_review", "kind": "Topic", "slug": "seq_series_review"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/", "id": "convergence-divergence-tests", "hide": false, "title": "Tests for convergence and divergence", "child_data": [{"kind": "Video", "id": "x1404a71d"}, {"kind": "Exercise", "id": "x8bf46c7d"}, {"kind": "Video", "id": "x18608b0a"}, {"kind": "Video", "id": "x84e53287"}, {"kind": "Exercise", "id": "x774ef9a0"}, {"kind": "Video", "id": "xaf5004b1"}, {"kind": "Video", "id": "x0039c7d4"}, {"kind": "Video", "id": "x8d385a4e"}, {"kind": "Video", "id": "x5b63d7f9"}, {"kind": "Exercise", "id": "x25d284f3"}, {"kind": "Video", "id": "x30ab4c93"}, {"kind": "Video", "id": "xf35d880b"}, {"kind": "Exercise", "id": "xf0318cc3"}, {"kind": "Video", "id": "x05f544f8"}, {"kind": "Video", "id": "xe42fe616"}], "children": [{"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/divergence-test/", "id": "1yInzfzDDKY", "title": "The nth term divergence test", "kind": "Video", "description": "Our first test to see whether a series diverges!", "slug": "divergence-test"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/nth-term-test/", "id": "nth-term-test", "title": "nth term test", "slug": "nth-term-test", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/ratio-test-convergence/", "id": "av947KCWf2U", "title": "Ratio test", "kind": "Video", "slug": "ratio-test-convergence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/radius-convergence-ratio-test/", "id": "4L9dSZN5Nvg", "title": "Radius of convergence using Ratio Test", "kind": "Video", "slug": "radius-convergence-ratio-test"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/ratio-test/", "id": "ratio-test", "title": "Ratio test", "slug": "ratio-test", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/comparison-test/", "id": "0tXxFPHzFFI", "title": "Comparison test", "kind": "Video", "slug": "comparison-test"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/harmonic-series-divergent/", "id": "4yyLfrsSXQQ", "title": "Famous proof that harmonic series diverges", "kind": "Video", "slug": "harmonic-series-divergent"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/comparison-test-convergence/", "id": "XoBlfbrdBpQ", "title": "Comparison test to show convergence", "kind": "Video", "slug": "comparison-test-convergence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/limit-comparison-test-cor/", "id": "AtbZZiSLemQ", "title": "Limit comparison test", "kind": "Video", "slug": "limit-comparison-test-cor"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/direct-and-limit-comparison-tests/", "id": "direct-and-limit-comparison-tests", "title": "Direct and limit comparison tests", "slug": "direct-and-limit-comparison-tests", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/alternating-series-test/", "id": "91qVGeyTl44", "title": "Alternating series test", "kind": "Video", "slug": "alternating-series-test"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/conditional-and-absolute-convergence/", "id": "ORTI4kk1okM", "title": "Conditional and absolute convergence", "kind": "Video", "description": "Conditional and absolute convergence", "slug": "conditional-and-absolute-convergence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/alternating-series/", "id": "alternating-series", "title": "Alternating series", "slug": "alternating-series", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/integral-test-intuition/", "id": "u1UKIljUWuc", "title": "Integral test intuition", "kind": "Video", "slug": "integral-test-intuition"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests/integral-test-divergence/", "id": "xRyXz_UZ14Q", "title": "Integral test to show series divergence", "kind": "Video", "slug": "integral-test-divergence"}], "in_knowledge_map": false, "description": "We will now deepen our convergence and divergence tool kits by exploring a series of \"tests\" we can apply to determine the behavior of some series.", "node_slug": "convergence-divergence-tests", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests", "extended_slug": "math/integral-calculus/sequences_series_approx_calc/convergence-divergence-tests", "kind": "Topic", "slug": "convergence-divergence-tests"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/estimating-infinite-series/", "id": "estimating-infinite-series", "hide": false, "title": "Estimating infinite series", "child_data": [{"kind": "Video", "id": "xf4c972d5"}, {"kind": "Video", "id": "x1880f053"}, {"kind": "Video", "id": "x37b67eba"}, {"kind": "Video", "id": "xef940f21"}, {"kind": "Exercise", "id": "xab2afce2"}], "children": [{"path": "khan/math/integral-calculus/sequences_series_approx_calc/estimating-infinite-series/integrals-estimating-p-series/", "id": "mUfp0KaXSj4", "title": "Using integrals to place bounds on infinite sum", "kind": "Video", "slug": "integrals-estimating-p-series"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/estimating-infinite-series/estimating-infinite-sum-integrals/", "id": "8I_KtODUekU", "title": "Estimating infinite series using integrals", "kind": "Video", "slug": "estimating-infinite-sum-integrals"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/estimating-infinite-series/alternating-series-error-estimation/", "id": "gs9O255gdEY", "title": "Alternating series error estimation", "kind": "Video", "slug": "alternating-series-error-estimation"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/estimating-infinite-series/alternating-series-remainder/", "id": "vTYxY4IpmF8", "title": "Alternating series remainder", "kind": "Video", "slug": "alternating-series-remainder"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/estimating-infinite-series/alternating-series-remainder_1/", "id": "alternating-series-remainder", "title": "Alternating series remainder", "description": "Apply the alternating series error test", "slug": "alternating-series-remainder_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We've spent a lot of time thinking about whether a series converges or diverges. But, even if we can determine that a series converges, how can we figure out what it converges to? This tutorial will show techniques of estimating what a series converges to and also determining how good our estimates are. This is super useful because most series can't be precisely evaluated (like we were able to do with infinite geometric series).", "node_slug": "estimating-infinite-series", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc/estimating-infinite-series", "extended_slug": "math/integral-calculus/sequences_series_approx_calc/estimating-infinite-series", "kind": "Topic", "slug": "estimating-infinite-series"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/power-series-algebra/", "id": "power-series-algebra", "hide": false, "title": "Power series function representation using algebra", "child_data": [{"kind": "Video", "id": "xf2f4de02"}, {"kind": "Video", "id": "x38e71a1b"}, {"kind": "Video", "id": "x4776b79b"}, {"kind": "Exercise", "id": "x421e068d"}, {"kind": "Video", "id": "x420cdc1d"}, {"kind": "Exercise", "id": "x7f6dc042"}], "children": [{"path": "khan/math/integral-calculus/sequences_series_approx_calc/power-series-algebra/power-series-radius-interval-convergence/", "id": "DlBQcj_zQk0", "title": "Power series radius and interval of convergence", "kind": "Video", "slug": "power-series-radius-interval-convergence"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/power-series-algebra/rep-function-with-geometric-series/", "id": "aiwy2fNF_ZQ", "title": "Representing function over interval of convergence", "kind": "Video", "slug": "rep-function-with-geometric-series"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/power-series-algebra/function-as-geometric-series/", "id": "6ynr9N-NQ8E", "title": "Function as geometric series", "kind": "Video", "slug": "function-as-geometric-series"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/power-series-algebra/creating-power-series-from-geometric-series-using-algebra/", "id": "creating-power-series-from-geometric-series-using-algebra", "title": "Creating power series from geometric series using algebra", "slug": "creating-power-series-from-geometric-series-using-algebra", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/power-series-algebra/power-series-using-integration/", "id": "znT4W6n3WkI", "title": "Power series representation using integration", "kind": "Video", "slug": "power-series-using-integration"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/power-series-algebra/creating-power-series-from-geometric-series-using-differentiation-and-integration/", "id": "creating-power-series-from-geometric-series-using-differentiation-and-integration", "title": "Creating power series from geometric series using differentiation and integration", "slug": "creating-power-series-from-geometric-series-using-differentiation-and-integration", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Now that we're familiar with the idea of an infinite series, we can now think about functions that are defined using infinite series. In particular, we'll begin to look at the power series representation of a function (and the special case of a geometric series). In later tutorials, we'll use calculus to find the power series of more types of functions.", "node_slug": "power-series-algebra", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc/power-series-algebra", "extended_slug": "math/integral-calculus/sequences_series_approx_calc/power-series-algebra", "kind": "Topic", "slug": "power-series-algebra"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/", "id": "maclaurin_taylor", "hide": false, "title": "Maclaurin series and Euler's identity", "child_data": [{"kind": "Video", "id": "89857202"}, {"kind": "Video", "id": "89857203"}, {"kind": "Video", "id": "89860962"}, {"kind": "Video", "id": "89858536"}, {"kind": "Video", "id": "90906155"}, {"kind": "Video", "id": "x1aeaa19d"}, {"kind": "Video", "id": "x13b06289"}, {"kind": "Exercise", "id": "xbd28f259"}, {"kind": "Video", "id": "xc5188ec7"}, {"kind": "Exercise", "id": "x69b511bb"}], "children": [{"path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/maclauren-and-taylor-series-intuition/", "id": "epgwuzzDHsQ", "title": "Maclaurin and Taylor series intuition", "kind": "Video", "description": "Approximating a function at 0 using a polynomial", "slug": "maclauren-and-taylor-series-intuition"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/cosine-taylor-series-at-0-maclaurin/", "id": "WWe7pZjc4s8", "title": "Cosine Taylor series at 0 (Maclaurin)", "kind": "Video", "description": "Approximating f(x)=cos x using a Maclauren Series (special case of a Taylor series at x=0)", "slug": "cosine-taylor-series-at-0-maclaurin"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/sine-taylor-series-at-0-maclaurin/", "id": "LlKvubIqHc8", "title": "Sine Taylor series at 0 (Maclaurin)", "kind": "Video", "description": "Sine Taylor Series at 0 (Maclaurin)", "slug": "sine-taylor-series-at-0-maclaurin"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/taylor-series-at-0-maclaurin-for-e-to-the-x/", "id": "JYQqml4-4q4", "title": "Taylor series at 0 (Maclaurin) for e to the x", "kind": "Video", "description": "Taylor Series at 0 (Maclaurin) for e to the x", "slug": "taylor-series-at-0-maclaurin-for-e-to-the-x"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/euler-s-formula-and-euler-s-identity/", "id": "mgNtPOgFje0", "title": "Euler's formula and Euler's identity", "kind": "Video", "description": "Rationale for Euler's Formula and Euler's Identity", "slug": "euler-s-formula-and-euler-s-identity"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/maclaurin-series-based-on-cos-x/", "id": "kXULrUxGzmU", "title": "Maclaurin series based on cos x", "kind": "Video", "slug": "maclaurin-series-based-on-cos-x"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/evaluating-power-series-for-mystery-function/", "id": "BAFOOQxiwkU", "title": "Evaluating power series for mystery function", "kind": "Video", "slug": "evaluating-power-series-for-mystery-function"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/maclaurin-series-for-sin-x-cos-x-and-e-x/", "id": "maclaurin-series-for-sin-x--cos-x--and-e-x", "title": "Maclaurin series for sin x, cos x, and e\u02e3", "slug": "maclaurin-series-for-sin-x-cos-x-and-e-x", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/finding-power-series-through-integration/", "id": "NgYrsqoKXpM", "title": "Finding power series through integration", "kind": "Video", "slug": "finding-power-series-through-integration"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor/integration-and-differentiation-of-power-series/", "id": "integration-and-differentiation-of-power-series", "title": "Integration and differentiation of power series", "description": "Integration and differentiation of power series", "slug": "integration-and-differentiation-of-power-series", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, we will learn to approximate differentiable functions with polynomials. Beyond just being super cool, this can be useful for approximating functions so that they are easier to calculate, differentiate or integrate. So whether you will have to write simulations or become a bond trader (bond traders use polynomial approximation to estimate changes in bond prices given interest rate changes and vice versa), this tutorial could be fun.\n\nIf that isn't motivation enough, we also come up with one of the most epic and powerful conclusions in all of mathematics in this tutorial: Euler's identity.", "node_slug": "maclaurin_taylor", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor", "extended_slug": "math/integral-calculus/sequences_series_approx_calc/maclaurin_taylor", "kind": "Topic", "slug": "maclaurin_taylor"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/", "id": "taylor-series", "hide": false, "title": "Taylor series approximations", "child_data": [{"kind": "Video", "id": "90906156"}, {"kind": "Video", "id": "90906157"}, {"kind": "Video", "id": "90906158"}, {"kind": "Video", "id": "x1aeaa19d"}, {"kind": "Video", "id": "xc5188ec7"}, {"kind": "Video", "id": "xd2005919"}, {"kind": "Exercise", "id": "xd6138712"}, {"kind": "Video", "id": "250668427"}, {"kind": "Video", "id": "250668428"}], "children": [{"path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/visualizing-taylor-series-approximations/", "id": "8dMLK2Wueaw", "title": "Visualizing Taylor series approximations", "kind": "Video", "description": "Using Wolfram Alpha to approximate sin(x)", "slug": "visualizing-taylor-series-approximations"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/generalized-taylor-series-approximation/", "id": "1LxhXqD3_CE", "title": "Generalized Taylor series approximation", "kind": "Video", "description": "Approximating a function around a non-zero x value", "slug": "generalized-taylor-series-approximation"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/visualizing-taylor-series-for-e-x/", "id": "AFMXixBVP-0", "title": "Visualizing Taylor series for e^x", "kind": "Video", "description": "Visualizing Taylor Series for e^x", "slug": "visualizing-taylor-series-for-e-x"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/maclaurin-series-based-on-cos-x/", "id": "kXULrUxGzmU", "title": "Maclaurin series based on cos x", "kind": "Video", "slug": "maclaurin-series-based-on-cos-x"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/finding-power-series-through-integration/", "id": "NgYrsqoKXpM", "title": "Finding power series through integration", "kind": "Video", "slug": "finding-power-series-through-integration"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/evaluating-taylor-polynomial-of-derivative/", "id": "aMIyUsF75Pw", "title": "Evaluating Taylor Polynomial of derivative", "kind": "Video", "slug": "evaluating-taylor-polynomial-of-derivative"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/finding-taylor-series/", "id": "finding-taylor-series", "title": "Finding taylor series", "description": "Finding taylor series using the definition", "slug": "finding-taylor-series", "kind": "Exercise"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/error-or-remainder-of-a-taylor-polynomial-approximation/", "id": "wgkRH5Uoavk", "title": "Error or remainder of a Taylor polynomial approximation", "kind": "Video", "description": "Understanding the properties of the remainder or error function for an Nth degree Taylor approximation of a function", "slug": "error-or-remainder-of-a-taylor-polynomial-approximation"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/taylor-series/proof-bounding-the-error-or-remainder-of-a-taylor-polynomial-approximation/", "id": "yUUPP70Fhpo", "title": "Proof: Bounding the error or remainder of a taylor polynomial approximation", "kind": "Video", "description": "Proof of the Lagrange Error Bound (the bound of the error)", "slug": "proof-bounding-the-error-or-remainder-of-a-taylor-polynomial-approximation"}], "in_knowledge_map": false, "description": "As we've already seen, Maclaurin series are special cases of Taylor series centered at 0. We'll now focus on more generalized Taylor series.", "node_slug": "taylor-series", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc/taylor-series", "extended_slug": "math/integral-calculus/sequences_series_approx_calc/taylor-series", "kind": "Topic", "slug": "taylor-series"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/", "id": "old_maclaurin_series", "hide": false, "title": "Sal's old Maclaurin and Taylor series tutorial", "child_data": [{"kind": "Video", "id": "24236"}, {"kind": "Video", "id": "24238"}, {"kind": "Video", "id": "24240"}, {"kind": "Video", "id": "24242"}, {"kind": "Video", "id": "24244"}, {"kind": "Video", "id": "24246"}, {"kind": "Video", "id": "24248"}, {"kind": "Video", "id": "24250"}], "children": [{"path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/polynomial-approximation-of-functions-part-1/", "id": "sy132cgqaiU", "title": "Polynomial approximation of functions (part 1)", "kind": "Video", "description": "Using a polynomial to approximate a function at f(0).", "slug": "polynomial-approximation-of-functions-part-1"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/polynomial-approximation-of-functions-part-2/", "id": "3JG3qn7-Sac", "title": "Polynomial approximation of functions (part 2)", "kind": "Video", "description": "Approximating a function with a polynomial by making the derivatives equal at f(0) (Maclauren Series)", "slug": "polynomial-approximation-of-functions-part-2"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/approximating-functions-with-polynomials-part-3/", "id": "XZDGrbyz0v0", "title": "Approximating functions with polynomials (part 3)", "kind": "Video", "description": "A glimpse of the mystery of the Universe as we approximate e^x with an infinite series.", "slug": "approximating-functions-with-polynomials-part-3"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/polynomial-approximation-of-functions-part-4/", "id": "gcJeg4SdIpU", "title": "Polynomial approximation of functions (part 4)", "kind": "Video", "description": "Approximating cos x with a Maclaurin series.", "slug": "polynomial-approximation-of-functions-part-4"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/polynomial-approximations-of-functions-part-5/", "id": "9AoDucUmO20", "title": "Polynomial approximations of functions (part 5)", "kind": "Video", "description": "MacLaurin representation of sin x", "slug": "polynomial-approximations-of-functions-part-5"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/polynomial-approximation-of-functions-part-6/", "id": "-gRNRBCG3Ow", "title": "Polynomial approximation of functions (part 6)", "kind": "Video", "description": "A pattern emerges!", "slug": "polynomial-approximation-of-functions-part-6"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/polynomial-approximation-of-functions-part-7/", "id": "bC5Lahh4Aus", "title": "Polynomial approximation of functions (part 7)", "kind": "Video", "description": "The most amazing conclusion in mathematics!", "slug": "polynomial-approximation-of-functions-part-7"}, {"path": "khan/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series/taylor-polynomials/", "id": "8SsC5st4LnI", "title": "Taylor polynomials", "kind": "Video", "description": "Approximating a function with a Taylor Polynomial", "slug": "taylor-polynomials"}], "in_knowledge_map": false, "description": "Everything in this tutorial is covered (with better resolution and handwriting) in the \"other\" Maclaurin and Taylor series tutorial, but this one has a bit of old-school charm so we are keeping it here for historical reasons.", "node_slug": "old_maclaurin_series", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series", "extended_slug": "math/integral-calculus/sequences_series_approx_calc/old_maclaurin_series", "kind": "Topic", "slug": "old_maclaurin_series"}], "in_knowledge_map": false, "description": "Sequences, series and approximating functions. Maclaurin and Taylor series.", "node_slug": "sequences_series_approx_calc", "render_type": "Topic", "topic_page_url": "/math/integral-calculus/sequences_series_approx_calc", "extended_slug": "math/integral-calculus/sequences_series_approx_calc", "kind": "Topic", "slug": "sequences_series_approx_calc"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/integral-calculus/ap_calc_topic/", "id": "ap_calc_topic", "hide": false, "title": "AP Calculus practice questions", "child_data": [{"kind": "Topic", "id": "xfdab3ab6"}, {"kind": "Topic", "id": "x78f9d2a9"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/", "id": "ab_examples", "hide": false, "title": "Calculus AB example questions", "child_data": [{"kind": "Video", "id": "244051678"}, {"kind": "Video", "id": "235193469"}, {"kind": "Video", "id": "235193472"}, {"kind": "Video", "id": "235193471"}, {"kind": "Video", "id": "235193473"}, {"kind": "Video", "id": "237109444"}, {"kind": "Video", "id": "237109441"}, {"kind": "Video", "id": "237109443"}, {"kind": "Video", "id": "238520373"}, {"kind": "Video", "id": "238520370"}, {"kind": "Video", "id": "238520372"}, {"kind": "Video", "id": "238520371"}, {"kind": "Video", "id": "244051677"}, {"kind": "Video", "id": "244051673"}, {"kind": "Video", "id": "244051676"}], "children": [{"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-1a/", "id": "ppBJWf_Wdmc", "title": "2011 Calculus AB free response #1a", "kind": "Video", "description": "Determining whether speed is increasing. Difference between speed and acceleration", "slug": "2011-calculus-ab-free-response-1a"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-2-a-b/", "id": "Z3X6QqezqUg", "title": "2011 Calculus AB free response #2 (a & b)", "kind": "Video", "description": "Approximating rate of change and total area under a curve. Trapezoidal sums to approximate integrals", "slug": "2011-calculus-ab-free-response-2-a-b"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-2-c-d/", "id": "2axaRJQkfVk", "title": "2011 Calculus AB free response #2 (c & d)", "kind": "Video", "description": "Second fundamental theorem of calculus application", "slug": "2011-calculus-ab-free-response-2-c-d"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-3-a-b/", "id": "9UhChwcVWq8", "title": "2011 Calculus AB free response #3 (a & b)", "kind": "Video", "description": "Equation of a tangent line and area between curves", "slug": "2011-calculus-ab-free-response-3-a-b"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-3-c/", "id": "v-H_7o7EMoU", "title": "2011 Calculus AB free response #3 (c)", "kind": "Video", "description": "Disk method to find the volume of a solid generated by rotation of a function", "slug": "2011-calculus-ab-free-response-3-c"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-4a/", "id": "tnoPnyvVjyc", "title": "2011 Calculus AB free response #4a", "kind": "Video", "description": "Taking derivatives and integrals of strangely defined functions", "slug": "2011-calculus-ab-free-response-4a"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-4b/", "id": "OvMBNVi5bLY", "title": "2011 Calculus AB free response #4b", "kind": "Video", "description": "Absolute maximum over an interval. Critical points and differentiability.", "slug": "2011-calculus-ab-free-response-4b"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-4c/", "id": "M_ADc9jkBig", "title": "2011 Calculus AB free response #4c", "kind": "Video", "description": "Finding the points of inflection for a strangely defined function", "slug": "2011-calculus-ab-free-response-4c"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-4d/", "id": "yX3JpmEgNHo", "title": "2011 Calculus AB free response #4d", "kind": "Video", "description": "Mean Value Theorem and differentiability", "slug": "2011-calculus-ab-free-response-4d"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-5a/", "id": "n9UvuzI2fq0", "title": "2011 Calculus AB free response #5a", "kind": "Video", "description": "Using a tangent line to extrapolate a function from a known initial condition", "slug": "2011-calculus-ab-free-response-5a"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-5b/", "id": "hAAIgNzBGg0", "title": "2011 Calculus AB free response #5b", "kind": "Video", "description": "Using the second derivative to judge whether an approximation with the tangent line is an overestimate or underestimate", "slug": "2011-calculus-ab-free-response-5b"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-5c/", "id": "R-2Uw10QgIo", "title": "2011 Calculus AB free response #5c.", "kind": "Video", "description": "Solving a differential equation using separation of variables", "slug": "2011-calculus-ab-free-response-5c"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-6a/", "id": "fr-8tjLoeDw", "title": "2011 Calculus AB free response #6a", "kind": "Video", "description": "Continuity of piecewise-defined functions", "slug": "2011-calculus-ab-free-response-6a"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-6b/", "id": "RuEJzPQ_N10", "title": "2011 Calculus AB free response #6b", "kind": "Video", "description": "Derivative of a piecewise-defined function", "slug": "2011-calculus-ab-free-response-6b"}, {"path": "khan/math/integral-calculus/ap_calc_topic/ab_examples/2011-calculus-ab-free-response-6c/", "id": "ucghWyc2_qs", "title": "2011 Calculus AB free response #6c", "kind": "Video", "description": "Average value of a piecewise-defined function on an interval", "slug": "2011-calculus-ab-free-response-6c"}], "in_knowledge_map": false, "description": "Many of you are planning on taking the Calculus AB advanced placement exam. These are example problems taken directly from previous years' exams. Even if you aren't taking the exam, these are very useful problem for making sure you understand your calculus (as always, best to pause the videos and try them yourself before Sal does).", "node_slug": "ab_examples", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/ap_calc_topic/ab_examples", "extended_slug": "math/integral-calculus/ap_calc_topic/ab_examples", "kind": "Topic", "slug": "ab_examples"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/", "id": "bc_sample_questions", "hide": false, "title": "Calculus BC sample questions", "child_data": [{"kind": "Video", "id": "24254"}, {"kind": "Video", "id": "24256"}, {"kind": "Video", "id": "24258"}, {"kind": "Video", "id": "24260"}, {"kind": "Video", "id": "24262"}, {"kind": "Video", "id": "24264"}, {"kind": "Video", "id": "24266"}, {"kind": "Video", "id": "244051675"}, {"kind": "Video", "id": "244051674"}, {"kind": "Video", "id": "246408189"}, {"kind": "Video", "id": "246408188"}, {"kind": "Video", "id": "246408186"}, {"kind": "Video", "id": "246408187"}, {"kind": "Video", "id": "248599678"}, {"kind": "Video", "id": "248599679"}, {"kind": "Video", "id": "250668426"}], "children": [{"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/ap-calculus-bc-exams-2008-1-a/", "id": "upO6Mh862PI", "title": "AP Calculus BC exams: 2008 1 a", "kind": "Video", "description": "Part 1a of the 2008 BC free response", "slug": "ap-calculus-bc-exams-2008-1-a"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/ap-calculus-bc-exams-2008-1-b-c/", "id": "xPb6HLM3xEQ", "title": "AP Calculus BC exams: 2008 1 b&c", "kind": "Video", "description": "Parts b and c of problem 1 (free response)", "slug": "ap-calculus-bc-exams-2008-1-b-c"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/ap-calculus-bc-exams-2008-1-c-d/", "id": "_l0Mfsu__gU", "title": "AP Calculus BC exams: 2008 1 c&d", "kind": "Video", "description": "parts c and d of problem 1 in the 2008 AP Calculus BC free response", "slug": "ap-calculus-bc-exams-2008-1-c-d"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/ap-calculus-bc-exams-2008-1-d/", "id": "sPTuCE5zd3s", "title": "AP Calculus BC exams: 2008 1 d", "kind": "Video", "description": "Part 1d of the 2008 AP Calculus BC exam (free response)", "slug": "ap-calculus-bc-exams-2008-1-d"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/calculus-bc-2008-2-a/", "id": "xvvI_QRYxBY", "title": "Calculus BC 2008 2 a", "kind": "Video", "description": "2a of 2008 Calculus BC exam (free response)", "slug": "calculus-bc-2008-2-a"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/calculus-bc-2008-2-b-c/", "id": "S4oOSgTj9C8", "title": "Calculus BC 2008 2 b &c", "kind": "Video", "description": "Parts 2b and 2c of the 2008 BC exam (free response)", "slug": "calculus-bc-2008-2-b-c"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/calculus-bc-2008-2d/", "id": "o_vMb655dFk", "title": "Calculus BC 2008 2d", "kind": "Video", "description": "Part 2d of the 2008 Calculus BC exam free-response section", "slug": "calculus-bc-2008-2d"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-1a/", "id": "wtLTb_VaI-k", "title": "2011 Calculus BC free response #1a", "kind": "Video", "description": "Velocity and acceleration vectors for particle", "slug": "2011-calculus-bc-free-response-1a"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-1-b-c/", "id": "73eSiVcg4tQ", "title": "2011 Calculus BC free response #1 (b & c)", "kind": "Video", "description": "Position and slope of particle's path at a given time", "slug": "2011-calculus-bc-free-response-1-b-c"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-1d/", "id": "v-4QScXlN0o", "title": "2011 Calculus BC free response #1d", "kind": "Video", "description": "Arc length for a curve", "slug": "2011-calculus-bc-free-response-1d"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-3a/", "id": "_G9JwTwjulA", "title": "2011 Calculus BC free response #3a", "kind": "Video", "description": "Arc length of a function", "slug": "2011-calculus-bc-free-response-3a"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-3-b-c/", "id": "lpXCvX6ZenM", "title": "2011 Calculus BC free response #3 (b & c)", "kind": "Video", "description": "Volume of a solid of rotation and Chain Rule for rates of change.", "slug": "2011-calculus-bc-free-response-3-b-c"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-6a/", "id": "1BGlbx67B6s", "title": "2011 Calculus BC free response #6a", "kind": "Video", "description": "Taylor Series approximation of sin(x)", "slug": "2011-calculus-bc-free-response-6a"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-6b/", "id": "NQazgcu8c7s", "title": "2011 Calculus BC free response #6b", "kind": "Video", "description": "Taylor Series for cos x at x=0", "slug": "2011-calculus-bc-free-response-6b"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-6c/", "id": "l1hJABkcuYI", "title": "2011 Calculus BC free response #6c", "kind": "Video", "description": "Calculating the 6th derivative at 0 from the Taylor Series approximation", "slug": "2011-calculus-bc-free-response-6c"}, {"path": "khan/math/integral-calculus/ap_calc_topic/bc_sample_questions/2011-calculus-bc-free-response-6d/", "id": "m6oMgtGsAa4", "title": "2011 Calculus BC free response #6d", "kind": "Video", "description": "Lagrange error bound for Taylor Polynomial approximation", "slug": "2011-calculus-bc-free-response-6d"}], "in_knowledge_map": false, "description": "The Calculus BC AP exam is a super set of the AB exam. It covers everything in AB as well as some of the more advanced topics in integration, sequences and function approximation. This tutorial is great practice for anyone looking to test their calculus mettle!", "node_slug": "bc_sample_questions", "render_type": "Tutorial", "topic_page_url": "/math/integral-calculus/ap_calc_topic/bc_sample_questions", "extended_slug": "math/integral-calculus/ap_calc_topic/bc_sample_questions", "kind": "Topic", "slug": "bc_sample_questions"}], "in_knowledge_map": false, "description": "Sample questions from the A.P. Calculus AB and BC exams (both multiple choice and free answer).", "node_slug": "ap_calc_topic", "render_type": "Topic", "topic_page_url": "/math/integral-calculus/ap_calc_topic", "extended_slug": "math/integral-calculus/ap_calc_topic", "kind": "Topic", "slug": "ap_calc_topic"}], "in_knowledge_map": false, "description": "Would you believe me if I told you that if you walked straight at a wall that you would never actually get to the wall? Integral calculus allows you to mathematically prove this crazy idea. When you think of calculus, think tiny as in infinitesimal. By subdividing the space between you and the wall into ever smaller divisions, you can mathematically establish that there is an infinite number of divisions, and you can never actually get to the wall. Do not try this at home kids, not without some help from integrals and derivatives, the basic tools of calculus. The study of integral calculus includes: integrals and their inverse, differentials, derivatives, anti-derivatives, and approximating the area of curvilinear regions.", "node_slug": "integral-calculus", "render_type": "Subject", "topic_page_url": "/math/integral-calculus", "extended_slug": "math/integral-calculus", "kind": "Topic", "slug": "integral-calculus"}, {"icon_src": "/images/power-mode/badges/differential-calculus-40x40.png", "contains": ["Topic", "Video"], "path": "khan/math/multivariable-calculus/", "id": "multivariable-calculus", "hide": false, "title": "Multivariable calculus", "child_data": [{"kind": "Topic", "id": "x8bb6e75b"}, {"kind": "Topic", "id": "xa1e91d2e"}, {"kind": "Topic", "id": "x833b5150"}, {"kind": "Topic", "id": "xa3642b9a"}, {"kind": "Topic", "id": "x4231f1f9"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/multivariable-calculus/double_triple_integrals/", "id": "double_triple_integrals", "hide": false, "title": "Double and triple integrals", "child_data": [{"kind": "Topic", "id": "xcfbd4cc9"}, {"kind": "Topic", "id": "x258f8a2f"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/double_triple_integrals/double_integrals/", "id": "double_integrals", "hide": false, "title": "Double integrals", "child_data": [{"kind": "Video", "id": "24288"}, {"kind": "Video", "id": "24290"}, {"kind": "Video", "id": "24292"}, {"kind": "Video", "id": "24294"}, {"kind": "Video", "id": "24296"}, {"kind": "Video", "id": "24298"}], "children": [{"path": "khan/math/multivariable-calculus/double_triple_integrals/double_integrals/double-integral-1/", "id": "85zGYB-34jQ", "title": "Double integral 1", "kind": "Video", "description": "Introduction to the double integral", "slug": "double-integral-1"}, {"path": "khan/math/multivariable-calculus/double_triple_integrals/double_integrals/double-integrals-2/", "id": "TdLD2Zh-nUQ", "title": "Double integrals 2", "kind": "Video", "description": "Figuring out the volume under z=xy^2", "slug": "double-integrals-2"}, {"path": "khan/math/multivariable-calculus/double_triple_integrals/double_integrals/double-integrals-3/", "id": "z8BM6cHifPA", "title": "Double integrals 3", "kind": "Video", "description": "Let's integrate dy first!", "slug": "double-integrals-3"}, {"path": "khan/math/multivariable-calculus/double_triple_integrals/double_integrals/double-integrals-4/", "id": "twT-WZChfZ8", "title": "Double integrals 4", "kind": "Video", "description": "Another way to conceptualize the double integral.", "slug": "double-integrals-4"}, {"path": "khan/math/multivariable-calculus/double_triple_integrals/double_integrals/double-integrals-5/", "id": "hrIPO8mQqtw", "title": "Double integrals 5", "kind": "Video", "description": "Finding the volume when we have variable boundaries.", "slug": "double-integrals-5"}, {"path": "khan/math/multivariable-calculus/double_triple_integrals/double_integrals/double-integrals-6/", "id": "0pv0QtOi5l8", "title": "Double integrals 6", "kind": "Video", "description": "Let's evaluate the double integrals with y=x^2 as one of the boundaries.", "slug": "double-integrals-6"}], "in_knowledge_map": false, "description": "A single definite integral can be used to find the area under a curve. with double integrals, we can start thinking about the volume under a surface!", "node_slug": "double_integrals", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/double_triple_integrals/double_integrals", "extended_slug": "math/multivariable-calculus/double_triple_integrals/double_integrals", "kind": "Topic", "slug": "double_integrals"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/double_triple_integrals/triple-integrals/", "id": "triple-integrals", "hide": false, "title": "Triple integrals", "child_data": [{"kind": "Video", "id": "24300"}, {"kind": "Video", "id": "24302"}, {"kind": "Video", "id": "24304"}], "children": [{"path": "khan/math/multivariable-calculus/double_triple_integrals/triple-integrals/triple-integrals-1/", "id": "vr0sTKbV7lI", "title": "Triple integrals 1", "kind": "Video", "description": "Introduction to the triple integral", "slug": "triple-integrals-1"}, {"path": "khan/math/multivariable-calculus/double_triple_integrals/triple-integrals/triple-integrals-2/", "id": "vxQvL_WhBGU", "title": "Triple integrals 2", "kind": "Video", "description": "Using a triple integral to find the mass of a volume of variable density.", "slug": "triple-integrals-2"}, {"path": "khan/math/multivariable-calculus/double_triple_integrals/triple-integrals/triple-integrals-3/", "id": "ZN2PfqZ4ihM", "title": "Triple integrals 3", "kind": "Video", "description": "Figuring out the boundaries of integration.", "slug": "triple-integrals-3"}], "in_knowledge_map": false, "description": "This is about as many integrals we can use before our brains explode. Now we can sum variable quantities in three-dimensions (what is the mass of a 3-D wacky object that has variable density)!", "node_slug": "triple-integrals", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/double_triple_integrals/triple-integrals", "extended_slug": "math/multivariable-calculus/double_triple_integrals/triple-integrals", "kind": "Topic", "slug": "triple-integrals"}], "in_knowledge_map": false, "description": "Volume under a surface with double integrals. Triple integrals as well.", "node_slug": "double_triple_integrals", "render_type": "Topic", "topic_page_url": "/math/multivariable-calculus/double_triple_integrals", "extended_slug": "math/multivariable-calculus/double_triple_integrals", "kind": "Topic", "slug": "double_triple_integrals"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/multivariable-calculus/partial_derivatives_topic/", "id": "partial_derivatives_topic", "hide": false, "title": "Partial derivatives, gradient, divergence, curl", "child_data": [{"kind": "Topic", "id": "x0774dfc3"}, {"kind": "Topic", "id": "x7502dbb0"}, {"kind": "Topic", "id": "x9ce4a406"}, {"kind": "Topic", "id": "x5300d17a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/partial_derivatives_topic/partial_derivatives/", "id": "partial_derivatives", "hide": false, "title": "Partial derivatives", "child_data": [{"kind": "Video", "id": "24268"}, {"kind": "Video", "id": "24270"}], "children": [{"path": "khan/math/multivariable-calculus/partial_derivatives_topic/partial_derivatives/partial-derivatives/", "id": "1CMDS4-PKKQ", "title": "Partial derivatives", "kind": "Video", "description": "Introduction to partial derivatives.", "slug": "partial-derivatives"}, {"path": "khan/math/multivariable-calculus/partial_derivatives_topic/partial_derivatives/partial-derivatives-2/", "id": "-u0mqFqpMNY", "title": "Partial derivatives 2", "kind": "Video", "description": "More on partial derivatives", "slug": "partial-derivatives-2"}], "in_knowledge_map": false, "description": "Let's jump out of that boring (okay, it wasn't THAT boring) 2-D world into the exciting 3-D world that we all live and breathe in. Instead of functions of x that can be visualized as lines, we can have functions of x and y that can be visualized as surfaces. But does the idea of a derivative still make sense? Of course it does! As long as you specify what direction you're going in. Welcome to the world of partial derivatives!", "node_slug": "partial_derivatives", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/partial_derivatives_topic/partial_derivatives", "extended_slug": "math/multivariable-calculus/partial_derivatives_topic/partial_derivatives", "kind": "Topic", "slug": "partial_derivatives"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/partial_derivatives_topic/gradient/", "id": "gradient", "hide": false, "title": "Gradient", "child_data": [{"kind": "Video", "id": "24272"}, {"kind": "Video", "id": "24274"}], "children": [{"path": "khan/math/multivariable-calculus/partial_derivatives_topic/gradient/gradient-1/", "id": "U7HQ_G_N6vo", "title": "Gradient 1", "kind": "Video", "description": "Introduction to the gradient", "slug": "gradient-1"}, {"path": "khan/math/multivariable-calculus/partial_derivatives_topic/gradient/gradient-of-a-scalar-field/", "id": "OB8b8aDGLgE", "title": "Gradient of a scalar field", "kind": "Video", "description": "Intuition of the gradient of a scalar field (temperature in a room) in 3 dimensions.", "slug": "gradient-of-a-scalar-field"}], "in_knowledge_map": false, "description": "Ever walk on hill (or any wacky surface) and wonder which way would be the fastest way up (or down). Now you can figure this out exactly with the gradient.", "node_slug": "gradient", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/partial_derivatives_topic/gradient", "extended_slug": "math/multivariable-calculus/partial_derivatives_topic/gradient", "kind": "Topic", "slug": "gradient"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/partial_derivatives_topic/divergence/", "id": "divergence", "hide": false, "title": "Divergence", "child_data": [{"kind": "Video", "id": "24276"}, {"kind": "Video", "id": "24278"}, {"kind": "Video", "id": "24280"}], "children": [{"path": "khan/math/multivariable-calculus/partial_derivatives_topic/divergence/divergence-1/", "id": "JAXyLhvZ-Vg", "title": "Divergence 1", "kind": "Video", "description": "Introduction to the divergence of a vector field.", "slug": "divergence-1"}, {"path": "khan/math/multivariable-calculus/partial_derivatives_topic/divergence/divergence-2/", "id": "tOX3RkH2guE", "title": "Divergence 2", "kind": "Video", "description": "The intuition of what the divergence of a vector field is.", "slug": "divergence-2"}, {"path": "khan/math/multivariable-calculus/partial_derivatives_topic/divergence/divergence-3/", "id": "U6Re4xT0o4w", "title": "Divergence 3", "kind": "Video", "description": "Analyzing a vector field using its divergence.", "slug": "divergence-3"}], "in_knowledge_map": false, "description": "Is a vector field \"coming together\" or \"drawing apart\" at a given point in space. The divergence is a vector operator that gives us a scalar value at any point in a vector field. If it is positive, then we are diverging. Otherwise, we are converging!", "node_slug": "divergence", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/partial_derivatives_topic/divergence", "extended_slug": "math/multivariable-calculus/partial_derivatives_topic/divergence", "kind": "Topic", "slug": "divergence"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/partial_derivatives_topic/curl/", "id": "curl", "hide": false, "title": "Curl", "child_data": [{"kind": "Video", "id": "24282"}, {"kind": "Video", "id": "24284"}, {"kind": "Video", "id": "24286"}], "children": [{"path": "khan/math/multivariable-calculus/partial_derivatives_topic/curl/curl-1/", "id": "Mt4dpGFVsYc", "title": "Curl 1", "kind": "Video", "description": "Introduction to the curl of a vector field", "slug": "curl-1"}, {"path": "khan/math/multivariable-calculus/partial_derivatives_topic/curl/curl-2/", "id": "hTSyVgBa1T0", "title": "Curl 2", "kind": "Video", "description": "The mechanics of calculating curl.", "slug": "curl-2"}, {"path": "khan/math/multivariable-calculus/partial_derivatives_topic/curl/curl-3/", "id": "fYzoiWIBjP8", "title": "Curl 3", "kind": "Video", "description": "More on curl", "slug": "curl-3"}], "in_knowledge_map": false, "description": "Curl measures how much a vector field is \"spinning\". A bit of a pain to calculate, but could come in handy when we work with Stokes' and Greens' theorems later on.", "node_slug": "curl", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/partial_derivatives_topic/curl", "extended_slug": "math/multivariable-calculus/partial_derivatives_topic/curl", "kind": "Topic", "slug": "curl"}], "in_knowledge_map": false, "description": "Thinking about forms of derivatives in multi-dimensions and for vector-valued functions: partial derivatives, gradient, divergence and curl.", "node_slug": "partial_derivatives_topic", "render_type": "Topic", "topic_page_url": "/math/multivariable-calculus/partial_derivatives_topic", "extended_slug": "math/multivariable-calculus/partial_derivatives_topic", "kind": "Topic", "slug": "partial_derivatives_topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/multivariable-calculus/line_integrals_topic/", "id": "line_integrals_topic", "hide": false, "title": "Line integrals and Green's theorem", "child_data": [{"kind": "Topic", "id": "x6a1ef063"}, {"kind": "Topic", "id": "x5dd2c2d3"}, {"kind": "Topic", "id": "x11a3b666"}, {"kind": "Topic", "id": "x17b3536e"}, {"kind": "Topic", "id": "xcc25eb22"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals/", "id": "line_integrals", "hide": false, "title": "Line integrals for scalar functions", "child_data": [{"kind": "Video", "id": "24308"}, {"kind": "Video", "id": "24310"}, {"kind": "Video", "id": "24312"}, {"kind": "Video", "id": "24314"}], "children": [{"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals/introduction-to-the-line-integral/", "id": "_60sKaoRmhU", "title": "Introduction to the line integral", "kind": "Video", "description": "Introduction to the Line Integral", "slug": "introduction-to-the-line-integral"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals/line-integral-example-1/", "id": "uXjQ8yc9Pdg", "title": "Line integral example 1", "kind": "Video", "description": "Concrete example using a line integral", "slug": "line-integral-example-1"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals/line-integral-example-2-part-1/", "id": "wyTjyQMVvc4", "title": "Line integral example 2 (part 1)", "kind": "Video", "description": "Line integral over a closed path (part 1)", "slug": "line-integral-example-2-part-1"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals/line-integral-example-2-part-2/", "id": "Qqanbd3gLhw", "title": "Line integral example 2 (part 2)", "kind": "Video", "description": "Part 2 of an example of taking a line integral over a closed path", "slug": "line-integral-example-2-part-2"}], "in_knowledge_map": false, "description": "With traditional integrals, our \"path\" was straight and linear (most of the time, we traversed the x-axis). Now we can explore taking integrals over any line or curve (called line integrals).", "node_slug": "line_integrals", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/line_integrals_topic/line_integrals", "extended_slug": "math/multivariable-calculus/line_integrals_topic/line_integrals", "kind": "Topic", "slug": "line_integrals"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/line_integrals_topic/position_vector_functions/", "id": "position_vector_functions", "hide": false, "title": "Position vector functions and derivatives", "child_data": [{"kind": "Video", "id": "24316"}, {"kind": "Video", "id": "24318"}, {"kind": "Video", "id": "24320"}, {"kind": "Video", "id": "24322"}], "children": [{"path": "khan/math/multivariable-calculus/line_integrals_topic/position_vector_functions/position-vector-valued-functions/", "id": "sBldw95xMD4", "title": "Position vector valued functions", "kind": "Video", "description": "Using a position vector valued function to describe a curve or path", "slug": "position-vector-valued-functions"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/position_vector_functions/derivative-of-a-position-vector-valued-function/", "id": "E9Q_Lc0g1xE", "title": "Derivative of a position vector valued function", "kind": "Video", "description": "Visualizing the derivative of a position vector valued function", "slug": "derivative-of-a-position-vector-valued-function"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/position_vector_functions/differential-of-a-vector-valued-function/", "id": "FYMn61HLw1k", "title": "Differential of a vector valued function", "kind": "Video", "description": "Understanding the differential of a vector valued function", "slug": "differential-of-a-vector-valued-function"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/position_vector_functions/vector-valued-function-derivative-example/", "id": "vcwvzUVLPw0", "title": "Vector valued function derivative example", "kind": "Video", "description": "Concrete example of the derivative of a vector valued function to better understand what it means", "slug": "vector-valued-function-derivative-example"}], "in_knowledge_map": false, "description": "In this tutorial, we will explore position vector functions and think about what it means to take a derivative of one. Very valuable for thinking about what it means to take a line integral along a path in a vector field (next tutorial).", "node_slug": "position_vector_functions", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/line_integrals_topic/position_vector_functions", "extended_slug": "math/multivariable-calculus/line_integrals_topic/position_vector_functions", "kind": "Topic", "slug": "position_vector_functions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/", "id": "line_integrals_vectors", "hide": false, "title": "Line integrals in vector fields", "child_data": [{"kind": "Video", "id": "24324"}, {"kind": "Video", "id": "24326"}, {"kind": "Video", "id": "24328"}, {"kind": "Video", "id": "24330"}, {"kind": "Video", "id": "24332"}, {"kind": "Video", "id": "24334"}, {"kind": "Video", "id": "24336"}, {"kind": "Video", "id": "24338"}, {"kind": "Video", "id": "24340"}], "children": [{"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/line-integrals-and-vector-fields/", "id": "t3cJYNdQLYg", "title": "Line integrals and vector fields", "kind": "Video", "description": "Using line integrals to find the work done on a particle moving through a vector field", "slug": "line-integrals-and-vector-fields"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/using-a-line-integral-to-find-the-work-done-by-a-vector-field-example/", "id": "AFF8FXxt5os", "title": "Using a line integral to find the work done by a vector field example", "kind": "Video", "description": "Using a line integral to find the work done by a vector field example", "slug": "using-a-line-integral-to-find-the-work-done-by-a-vector-field-example"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/parametrization-of-a-reverse-path/", "id": "eGRZKkmI_fo", "title": "Parametrization of a reverse path", "kind": "Video", "description": "Understanding how to parametrize a reverse path for the same curve.", "slug": "parametrization-of-a-reverse-path"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/scalar-field-line-integral-independent-of-path-direction/", "id": "99pD1-6ZpuM", "title": "Scalar field line integral independent of path direction", "kind": "Video", "description": "Showing that the line integral of a scalar field is independent of path direction", "slug": "scalar-field-line-integral-independent-of-path-direction"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/vector-field-line-integrals-dependent-on-path-direction/", "id": "fuSOY9r1R6w", "title": "Vector field line integrals dependent on path direction", "kind": "Video", "description": "Showing that, unlike line integrals of scalar fields, line integrals over vector fields are path direction dependent", "slug": "vector-field-line-integrals-dependent-on-path-direction"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/path-independence-for-line-integrals/", "id": "K_fgnCJOI8I", "title": "Path independence for line integrals", "kind": "Video", "description": "Showing that if a vector field is the gradient of a scalar field, then its line integral is path independent", "slug": "path-independence-for-line-integrals"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/closed-curve-line-integrals-of-conservative-vector-fields/", "id": "I2dbzp0zHuw", "title": "Closed curve line integrals of conservative vector fields", "kind": "Video", "description": "Showing that the line integral along closed curves of conservative vector fields is zero", "slug": "closed-curve-line-integrals-of-conservative-vector-fields"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/example-of-closed-line-integral-of-conservative-field/", "id": "Q9t1LghwdGc", "title": "Example of closed line integral of conservative field", "kind": "Video", "description": "Example of taking a closed line integral of a conservative field", "slug": "example-of-closed-line-integral-of-conservative-field"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors/second-example-of-line-integral-of-conservative-vector-field/", "id": "LpY8Qa3IP1w", "title": "Second example of line integral of conservative vector field", "kind": "Video", "description": "Using path independence of a conservative vector field to solve a line integral", "slug": "second-example-of-line-integral-of-conservative-vector-field"}], "in_knowledge_map": false, "description": "You've done some work with line integral with scalar functions and you know something about parameterizing position-vector valued functions. In that case, welcome! You are now ready to explore a core tool math and physics: the line integral for vector fields. Need to know the work done as a mass is moved through a gravitational field. No sweat with line integrals.", "node_slug": "line_integrals_vectors", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/line_integrals_topic/line_integrals_vectors", "extended_slug": "math/multivariable-calculus/line_integrals_topic/line_integrals_vectors", "kind": "Topic", "slug": "line_integrals_vectors"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/line_integrals_topic/greens_theorem/", "id": "greens_theorem", "hide": false, "title": "Green's theorem", "child_data": [{"kind": "Video", "id": "24342"}, {"kind": "Video", "id": "24344"}, {"kind": "Video", "id": "24346"}, {"kind": "Video", "id": "24348"}], "children": [{"path": "khan/math/multivariable-calculus/line_integrals_topic/greens_theorem/green-s-theorem-proof-part-1/", "id": "l5zJvZKfMYE", "title": "Green's theorem proof part 1", "kind": "Video", "description": "Part 1 of the proof of Green's Theorem", "slug": "green-s-theorem-proof-part-1"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/greens_theorem/green-s-theorem-proof-part-2/", "id": "qdFD-0OWBRo", "title": "Green's theorem proof (part 2)", "kind": "Video", "description": "Part 2 of the proof of Green's Theorem", "slug": "green-s-theorem-proof-part-2"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/greens_theorem/green-s-theorem-example-1/", "id": "gGXnILbrhsM", "title": "Green's theorem example 1", "kind": "Video", "description": "Using Green's Theorem to solve a line integral of a vector field", "slug": "green-s-theorem-example-1"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/greens_theorem/green-s-theorem-example-2/", "id": "sSyPAAyL8nQ", "title": "Green's theorem example 2", "kind": "Video", "description": "Another example applying Green's Theorem", "slug": "green-s-theorem-example-2"}], "in_knowledge_map": false, "description": "It is sometimes easier to take a double integral (a particular double integral as we'll see) over a region and sometimes easier to take a line integral around the boundary. Green's theorem draws the connection between the two so we can go back and forth. This tutorial proves Green's theorem and then gives a few examples of using it. If you can take line integrals through vector fields, you're ready for Mr. Green.", "node_slug": "greens_theorem", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/line_integrals_topic/greens_theorem", "extended_slug": "math/multivariable-calculus/line_integrals_topic/greens_theorem", "kind": "Topic", "slug": "greens_theorem"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/line_integrals_topic/2d_divergence_theorem/", "id": "2d_divergence_theorem", "hide": false, "title": "2D divergence theorem", "child_data": [{"kind": "Video", "id": "809395096"}, {"kind": "Video", "id": "809321651"}, {"kind": "Video", "id": "809302581"}], "children": [{"path": "khan/math/multivariable-calculus/line_integrals_topic/2d_divergence_theorem/constructing-a-unit-normal-vector-to-a-curve/", "id": "_9x2cqO7-Ig", "title": "Constructing a unit normal vector to a curve", "kind": "Video", "description": "Figuring out a unit normal vector at any point along a curve defined by a position vector function", "slug": "constructing-a-unit-normal-vector-to-a-curve"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/2d_divergence_theorem/2-d-divergence-theorem/", "id": "eoJGBr-tJXo", "title": "2D divergence theorem", "kind": "Video", "description": "Using Green's Theorem to establish a two dimensional version of the Divergence Theorem", "slug": "2-d-divergence-theorem"}, {"path": "khan/math/multivariable-calculus/line_integrals_topic/2d_divergence_theorem/conceptual-clarification-for-2-d-divergence-theorem/", "id": "qs0hRHfnzTQ", "title": "Conceptual clarification for 2D divergence theorem", "kind": "Video", "description": "Understanding the line integral as flux through a boundary", "slug": "conceptual-clarification-for-2-d-divergence-theorem"}], "in_knowledge_map": false, "description": "Using Green's theorem (which you should already be familiar with) to establish that the \"flux\" through the boundary of a region is equal to the double integral of the divergence over the region. We'll also talk about why this makes conceptual sense.", "node_slug": "2d_divergence_theorem", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/line_integrals_topic/2d_divergence_theorem", "extended_slug": "math/multivariable-calculus/line_integrals_topic/2d_divergence_theorem", "kind": "Topic", "slug": "2d_divergence_theorem"}], "in_knowledge_map": false, "description": "Line integral of scalar and vector-valued functions. Green's theorem and 2-D divergence theorem.", "node_slug": "line_integrals_topic", "render_type": "Topic", "topic_page_url": "/math/multivariable-calculus/line_integrals_topic", "extended_slug": "math/multivariable-calculus/line_integrals_topic", "kind": "Topic", "slug": "line_integrals_topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/multivariable-calculus/surface-integrals/", "id": "surface-integrals", "hide": false, "title": "Surface integrals and Stokes' theorem", "child_data": [{"kind": "Topic", "id": "xaaa03698"}, {"kind": "Topic", "id": "xd5892eb4"}, {"kind": "Topic", "id": "x9106372b"}, {"kind": "Topic", "id": "x86156ed3"}, {"kind": "Topic", "id": "x82104bac"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/surface-integrals/surface_parametrization/", "id": "surface_parametrization", "hide": false, "title": "Parameterizing a surface", "child_data": [{"kind": "Video", "id": "2505283"}, {"kind": "Video", "id": "2542218"}], "children": [{"path": "khan/math/multivariable-calculus/surface-integrals/surface_parametrization/introduction-to-parametrizing-a-surface-with-two-parameters/", "id": "owKAHXf1y1A", "title": "Introduction to parametrizing a surface with two parameters", "kind": "Video", "description": "Introduction to Parametrizing a Surface with Two Parameters", "slug": "introduction-to-parametrizing-a-surface-with-two-parameters"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_parametrization/determining-a-position-vector-valued-function-for-a-parametrization-of-two-parameters/", "id": "bJ_09eoCmag", "title": "Determining a position vector-valued function for a parametrization of two parameters", "kind": "Video", "description": "Determining a Position Vector-Valued Function for a Parametrization of Two Parameters", "slug": "determining-a-position-vector-valued-function-for-a-parametrization-of-two-parameters"}], "in_knowledge_map": false, "description": "You can parameterize a line with a position vector valued function and understand what a differential means in that context already. This tutorial will take things further by parametrizing surfaces (2 parameters baby!) and have us thinking about partial differentials.", "node_slug": "surface_parametrization", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/surface-integrals/surface_parametrization", "extended_slug": "math/multivariable-calculus/surface-integrals/surface_parametrization", "kind": "Topic", "slug": "surface_parametrization"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/", "id": "surface_integrals", "hide": false, "title": "Surface integrals", "child_data": [{"kind": "Video", "id": "2565195"}, {"kind": "Video", "id": "24356"}, {"kind": "Video", "id": "24358"}, {"kind": "Video", "id": "24360"}, {"kind": "Video", "id": "24362"}, {"kind": "Video", "id": "809362246"}, {"kind": "Video", "id": "809263849"}, {"kind": "Video", "id": "809327989"}, {"kind": "Video", "id": "815244209"}, {"kind": "Video", "id": "815252175"}, {"kind": "Video", "id": "815198581"}, {"kind": "Video", "id": "815059993"}, {"kind": "Video", "id": "815160761"}, {"kind": "Video", "id": "815201348"}], "children": [{"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/partial-derivatives-of-vector-valued-functions/", "id": "c7ByaI3T7Dc", "title": "Partial derivatives of vector-valued functions", "kind": "Video", "description": "Partial Derivatives of Vector-Valued Functions", "slug": "partial-derivatives-of-vector-valued-functions"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/introduction-to-the-surface-integral/", "id": "9k97m8oWnaY", "title": "Introduction to the surface integral", "kind": "Video", "description": "Introduction to the surface integral", "slug": "introduction-to-the-surface-integral"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/example-of-calculating-a-surface-integral-part-1/", "id": "7sQCcGlK2bY", "title": "Example of calculating a surface integral part 1", "kind": "Video", "description": "Example of calculating a surface integral part 1", "slug": "example-of-calculating-a-surface-integral-part-1"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/example-of-calculating-a-surface-integral-part-2/", "id": "qQAhhithHa8", "title": "Example of calculating a surface integral part 2", "kind": "Video", "description": "Example of calculating a surface integral part 2", "slug": "example-of-calculating-a-surface-integral-part-2"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/example-of-calculating-a-surface-integral-part-3/", "id": "s2_NTiISZl4", "title": "Example of calculating a surface integral part 3", "kind": "Video", "description": "Example of calculating a surface integral part 3", "slug": "example-of-calculating-a-surface-integral-part-3"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-example-part-1-parameterizing-the-unit-sphere/", "id": "E_Hwhp74Rhc", "title": "Surface integral example part 1: Parameterizing the unit sphere", "kind": "Video", "description": "Visualizing a suitable parameterization", "slug": "surface-integral-example-part-1-parameterizing-the-unit-sphere"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-example-part-2-calculating-the-surface-differential/", "id": "tyVCA_8MUV4", "title": "Surface integral example part 2: Calculating the surface differential", "kind": "Video", "description": "Taking the cross product to calculate the surface differential in terms of the parameters", "slug": "surface-integral-example-part-2-calculating-the-surface-differential"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-example-part-3-the-home-stretch/", "id": "uzOXGgAgmPs", "title": "Surface integral example part 3: The home stretch", "kind": "Video", "description": "Using a few trigonometric identities to finally calculate the value of the surface integral", "slug": "surface-integral-example-part-3-the-home-stretch"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex2-part-1-parameterizing-the-surface/", "id": "PpUWpxAb39w", "title": "Surface integral ex2 part 1: Parameterizing the surface", "kind": "Video", "description": "Parametrizing a surface that can be explictly made a function of x and y.", "slug": "surface-integral-ex2-part-1-parameterizing-the-surface"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex2-part-2-evaluating-integral/", "id": "ItW5CxLsLSo", "title": "Surface integral ex2 part 2: Evaluating integral", "kind": "Video", "description": "Evaluating the surface integral", "slug": "surface-integral-ex2-part-2-evaluating-integral"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex3-part-1-parameterizing-the-outside-surface/", "id": "EOpzN8ZHqpU", "title": "Surface integral ex3 part 1: Parameterizing the outside surface", "kind": "Video", "description": "Breaking apart a larger surface into its components", "slug": "surface-integral-ex3-part-1-parameterizing-the-outside-surface"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex3-part-2-evaluating-the-outside-surface/", "id": "xGiILI906C4", "title": "Surface integral ex3 part 2: Evaluating the outside surface", "kind": "Video", "description": "Evaluating the surface integral over the outside of the chopped cylinder", "slug": "surface-integral-ex3-part-2-evaluating-the-outside-surface"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex3-part-3-top-surface/", "id": "wiVWafc3JBM", "title": "Surface integral ex3 part 3: Top surface", "kind": "Video", "description": "Parametrizing the top surface", "slug": "surface-integral-ex3-part-3-top-surface"}, {"path": "khan/math/multivariable-calculus/surface-integrals/surface_integrals/surface-integral-ex3-part-4-home-stretch/", "id": "bhrmEy0wvD0", "title": "Surface integral ex3 part 4: Home stretch", "kind": "Video", "description": "Evaluating the third surface integral and coming to the final answer", "slug": "surface-integral-ex3-part-4-home-stretch"}], "in_knowledge_map": false, "description": "Finding line integrals to be a bit boring? Well, this tutorial will add new dimension to your life by explore what surface integrals are and how we can calculate them.", "node_slug": "surface_integrals", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/surface-integrals/surface_integrals", "extended_slug": "math/multivariable-calculus/surface-integrals/surface_integrals", "kind": "Topic", "slug": "surface_integrals"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/surface-integrals/3d_flux/", "id": "3d_flux", "hide": false, "title": "Flux in 3D and constructing unit normal vectors to surface", "child_data": [{"kind": "Video", "id": "815159721"}, {"kind": "Video", "id": "815232513"}, {"kind": "Video", "id": "815106014"}], "children": [{"path": "khan/math/multivariable-calculus/surface-integrals/3d_flux/conceputal-understanding-of-flux-in-three-dimensions/", "id": "ivg3dLTarbs", "title": "Conceptual understanding of flux in three dimensions", "kind": "Video", "description": "Conceptual understanding of flux across a two-dimensional surface", "slug": "conceputal-understanding-of-flux-in-three-dimensions"}, {"path": "khan/math/multivariable-calculus/surface-integrals/3d_flux/constructing-a-unit-normal-vector-to-a-surface/", "id": "usH9VUi2-Xg", "title": "Constructing a unit normal vector to a surface", "kind": "Video", "description": "Deriving a unit normal vector from the surface parametrization", "slug": "constructing-a-unit-normal-vector-to-a-surface"}, {"path": "khan/math/multivariable-calculus/surface-integrals/3d_flux/vector-representation-of-a-surface-integral/", "id": "NCwwfvPEVn8", "title": "Vector representation of a surface integral", "kind": "Video", "description": "Different ways of representing a flux integral", "slug": "vector-representation-of-a-surface-integral"}], "in_knowledge_map": false, "description": "Flux can be view as the rate at which \"stuff\" passes through a surface. Imagine a net placed in a river and imagine the water that is flowing directly across the net in a unit of time--this is flux (and it would depend on the orientation of the net, the shape of the net, and the speed and direction of the current). It is an important idea throughout physics and is key for understanding Stokes' theorem and the divergence theorem.", "node_slug": "3d_flux", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/surface-integrals/3d_flux", "extended_slug": "math/multivariable-calculus/surface-integrals/3d_flux", "kind": "Topic", "slug": "3d_flux"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/", "id": "stokes_theorem", "hide": false, "title": "Stokes' theorem intuition and application", "child_data": [{"kind": "Video", "id": "873691665"}, {"kind": "Video", "id": "873865593"}, {"kind": "Video", "id": "873764943"}, {"kind": "Video", "id": "874076304"}, {"kind": "Video", "id": "878103964"}, {"kind": "Video", "id": "878112005"}, {"kind": "Video", "id": "878163443"}, {"kind": "Video", "id": "878196180"}, {"kind": "Video", "id": "878133910"}, {"kind": "Video", "id": "1254589677"}, {"kind": "Video", "id": "1254590705"}], "children": [{"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/stokes-theorem-intuition/", "id": "9iaYNaENVH4", "title": "Stokes' theorem intuition", "kind": "Video", "description": "Conceptual understanding of why the curl of a vector field along a surface would relate to the line integral around the surface's boundary", "slug": "stokes-theorem-intuition"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/green-s-and-stokes-theorem-relationship/", "id": "TPov_v9mLWc", "title": "Green's and Stokes' theorem relationship", "kind": "Video", "description": "Seeing that Green's Theorem is just a special case of Stokes' Theorem", "slug": "green-s-and-stokes-theorem-relationship"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/orienting-boundary-with-surface/", "id": "84NkvxfMPtM", "title": "Orienting boundary with surface", "kind": "Video", "description": "Determining the proper orientation of the boundary given the orientation of the surface", "slug": "orienting-boundary-with-surface"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/orientation-and-stokes/", "id": "U6U4HhR3Fqc", "title": "Orientation and stokes", "kind": "Video", "description": "Determining the proper orientation of a boundary given the orientation of the normal vector", "slug": "orientation-and-stokes"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/conditions-for-stokes-theorem/", "id": "yDB-191sa2M", "title": "Conditions for stokes theorem", "kind": "Video", "description": "Understanding when you can use Stokes. Piecewise-smooth lines and surfaces", "slug": "conditions-for-stokes-theorem"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/stokes-example-part-1/", "id": "E2MRMdaPKcc", "title": "Stokes example part 1", "kind": "Video", "description": "Starting to apply Stokes theorem to solve a line integral", "slug": "stokes-example-part-1"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/part-2-parameterizing-the-surface/", "id": "9bwy85M1Zxg", "title": "Stokes example part 2: Parameterizing the surface", "kind": "Video", "slug": "part-2-parameterizing-the-surface"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/stokes-example-part-3-surface-to-double-integral/", "id": "VPz4bCQDGgk", "title": "Stokes example part 3: Surface to double integral", "kind": "Video", "description": "Converting the surface integral to a double integral", "slug": "stokes-example-part-3-surface-to-double-integral"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/stokes-example-part-4-curl-and-final-answer/", "id": "clL2jLXtX4I", "title": "Stokes example part 4: Curl and final answer", "kind": "Video", "description": "Finding the curl of the vector field and then evaluating the double integral in the parameter domain", "slug": "stokes-example-part-4-curl-and-final-answer"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/evaluating-line-integral-directly-part-1/", "id": "A57_63yP1UU", "title": "Evaluating line integral directly - part 1", "kind": "Video", "description": "Showing that we didn't need to use Stokes' Theorem to evaluate this line integral", "slug": "evaluating-line-integral-directly-part-1"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_theorem/evaluating-line-integral-directly-part-2/", "id": "Jhu1M53AF0E", "title": "Evaluating line integral directly - part 2", "kind": "Video", "description": "Finishing up the line integral with a little trigonometric integration", "slug": "evaluating-line-integral-directly-part-2"}], "in_knowledge_map": false, "description": "Stokes' theorem relates the line integral around a surface to the curl on the surface. This tutorial explores the intuition behind Stokes' theorem, how it is an extension of Green's theorem to surfaces (as opposed to just regions) and gives some examples using it. We prove Stokes' theorem in another tutorial. Good to come to this tutorial having experienced the tutorial on \"flux in 3D\".", "node_slug": "stokes_theorem", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/surface-integrals/stokes_theorem", "extended_slug": "math/multivariable-calculus/surface-integrals/stokes_theorem", "kind": "Topic", "slug": "stokes_theorem"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/", "id": "stokes_proof", "hide": false, "title": "Proof of Stokes' theorem", "child_data": [{"kind": "Video", "id": "1254599500"}, {"kind": "Video", "id": "1254626652"}, {"kind": "Video", "id": "1254632405"}, {"kind": "Video", "id": "1254257997"}, {"kind": "Video", "id": "1254588379"}, {"kind": "Video", "id": "1254528847"}, {"kind": "Video", "id": "1254530460"}], "children": [{"path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-1/", "id": "qIBqvr5_QqQ", "title": "Stokes' theorem proof part 1", "kind": "Video", "description": "The beginning of a proof of Stokes' theorem for a special class of surfaces. Finding the curl of our vector field.", "slug": "stokes-theorem-proof-part-1"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-2/", "id": "apWQoMKVmW4", "title": "Stokes' theorem proof part 2", "kind": "Video", "description": "Figuring out a parameterization of our surface and representing dS", "slug": "stokes-theorem-proof-part-2"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-3/", "id": "4o4P7KrkzXg", "title": "Stokes' theorem proof part 3", "kind": "Video", "description": "Writing our surface integral as a double integral over the domain of our parameters", "slug": "stokes-theorem-proof-part-3"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-4/", "id": "1og25U-d3_8", "title": "Stokes' theorem proof part 4", "kind": "Video", "description": "Starting to work on the line integral about the surface", "slug": "stokes-theorem-proof-part-4"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-5/", "id": "a29qZSRDBdE", "title": "Stokes' theorem proof part 5", "kind": "Video", "description": "Working on the integrals...", "slug": "stokes-theorem-proof-part-5"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-6/", "id": "02gVmoObrjM", "title": "Stokes' theorem proof part 6", "kind": "Video", "description": "More manipulating the integrals...", "slug": "stokes-theorem-proof-part-6"}, {"path": "khan/math/multivariable-calculus/surface-integrals/stokes_proof/stokes-theorem-proof-part-7/", "id": "YT6XwkcPcsw", "title": "Stokes' theorem proof part 7", "kind": "Video", "description": "Using Green's Theorem to complete the proof", "slug": "stokes-theorem-proof-part-7"}], "in_knowledge_map": false, "description": "You know what Stokes' theorem is and how to apply it, but are craving for some real proof that it is true. Well, you've found the right tutorial!", "node_slug": "stokes_proof", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/surface-integrals/stokes_proof", "extended_slug": "math/multivariable-calculus/surface-integrals/stokes_proof", "kind": "Topic", "slug": "stokes_proof"}], "in_knowledge_map": false, "description": "Parameterizing a surface. Surface integrals. Stokes' theorem.", "node_slug": "surface-integrals", "render_type": "Topic", "topic_page_url": "/math/multivariable-calculus/surface-integrals", "extended_slug": "math/multivariable-calculus/surface-integrals", "kind": "Topic", "slug": "surface-integrals"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/multivariable-calculus/divergence_theorem_topic/", "id": "divergence_theorem_topic", "hide": false, "title": "Divergence theorem", "child_data": [{"kind": "Topic", "id": "x68dc1d26"}, {"kind": "Topic", "id": "xa32c40bb"}, {"kind": "Topic", "id": "x926d8113"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem/", "id": "divergence_theorem", "hide": false, "title": "Divergence theorem (3D)", "child_data": [{"kind": "Video", "id": "1254611464"}, {"kind": "Video", "id": "1254640190"}, {"kind": "Video", "id": "1254539389"}], "children": [{"path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem/3-d-divergence-theorem-intuition/", "id": "XyiQ2dwJHXE", "title": "3D divergence theorem intuition", "kind": "Video", "description": "Intuition behind the Divergence Theorem in three dimensions", "slug": "3-d-divergence-theorem-intuition"}, {"path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem/divergence-theorem-example-1/", "id": "asyIsn59Lnc", "title": "Divergence theorem example 1", "kind": "Video", "description": "Example of calculating the flux across a surface by using the Divergence Theorem", "slug": "divergence-theorem-example-1"}, {"path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem/why-we-got-zero-flux-in-divergence-theorem-example-1/", "id": "iFpyKTuC7jY", "title": "Why we got zero flux in divergence theorem example 1", "kind": "Video", "description": "Intuition as to why we go no net flux in the last worked example", "slug": "why-we-got-zero-flux-in-divergence-theorem-example-1"}], "in_knowledge_map": false, "description": "An earlier tutorial used Green's theorem to prove the divergence theorem in 2-D, this tutorial gives us the 3-D version (what most people are talking about when they refer to the \"divergence theorem\"). We will get an intuition for it (that the flux through a close surface--like a balloon--should be equal to the divergence across it's volume). We will use it in examples. We will prove it in another tutorial.", "node_slug": "divergence_theorem", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem", "extended_slug": "math/multivariable-calculus/divergence_theorem_topic/divergence_theorem", "kind": "Topic", "slug": "divergence_theorem"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/divergence_theorem_topic/region_types_3d/", "id": "region_types_3d", "hide": false, "title": "Types of regions in three dimensions", "child_data": [{"kind": "Video", "id": "1254699123"}, {"kind": "Video", "id": "1254469905"}, {"kind": "Video", "id": "1254671407"}], "children": [{"path": "khan/math/multivariable-calculus/divergence_theorem_topic/region_types_3d/type-i-regions-in-three-dimensions/", "id": "A11AfJ2-3rE", "title": "Type I regions in three dimensions", "kind": "Video", "description": "Definition of Type 1 regions. Visualizing what is and isn't a Type I region", "slug": "type-i-regions-in-three-dimensions"}, {"path": "khan/math/multivariable-calculus/divergence_theorem_topic/region_types_3d/type-ii-regions-in-three-dimensions/", "id": "pZ_2bATPi2I", "title": "Type II regions in three dimensions", "kind": "Video", "description": "Definition and intuition for Type 2 Regions", "slug": "type-ii-regions-in-three-dimensions"}, {"path": "khan/math/multivariable-calculus/divergence_theorem_topic/region_types_3d/type-iii-regions-in-three-dimensions/", "id": "bxGnbVOtRYo", "title": "Type III regions in three dimensions", "kind": "Video", "description": "Definition and intuition for type 3 regions", "slug": "type-iii-regions-in-three-dimensions"}], "in_knowledge_map": false, "description": "This tutorial classifies regions in three dimensions. Comes in useful for some types of double integrals and we use these ideas to prove the divergence theorem.", "node_slug": "region_types_3d", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/divergence_theorem_topic/region_types_3d", "extended_slug": "math/multivariable-calculus/divergence_theorem_topic/region_types_3d", "kind": "Topic", "slug": "region_types_3d"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof/", "id": "divergence_theorem_proof", "hide": false, "title": "Divergence theorem proof", "child_data": [{"kind": "Video", "id": "1254638405"}, {"kind": "Video", "id": "1254358889"}, {"kind": "Video", "id": "1254688165"}, {"kind": "Video", "id": "1254709098"}, {"kind": "Video", "id": "1254605394"}], "children": [{"path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof/divergence-theorem-proof-part-1/", "id": "vCAFlt4pQSQ", "title": "Divergence theorem proof (part 1)", "kind": "Video", "description": "Setting up the proof for the divergence theorem", "slug": "divergence-theorem-proof-part-1"}, {"path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof/divergence-theorem-proof-part-2/", "id": "OM3e-J3euXo", "title": "Divergence theorem proof (part 2)", "kind": "Video", "description": "Breaking up the surface integral", "slug": "divergence-theorem-proof-part-2"}, {"path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof/divergence-theorem-proof-part-3/", "id": "3_W6bGuTfzU", "title": "Divergence theorem proof (part 3)", "kind": "Video", "description": "Evaluating the surface integral", "slug": "divergence-theorem-proof-part-3"}, {"path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof/divergence-theorem-proof-part-4/", "id": "lUD7ti47IQc", "title": "Divergence theorem proof (part 4)", "kind": "Video", "description": "More evaluation of the surface integral", "slug": "divergence-theorem-proof-part-4"}, {"path": "khan/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof/divergence-theorem-proof-part-5/", "id": "DrRsXhln4S8", "title": "Divergence theorem proof (part 5)", "kind": "Video", "description": "Home stretch. Proving the Type I part", "slug": "divergence-theorem-proof-part-5"}], "in_knowledge_map": false, "description": "You know what the divergence theorem is, you can apply it and you conceptually understand it. This tutorial will actually prove it to you (references types of regions which are covered in the \"types of regions in 3d\" tutorial.", "node_slug": "divergence_theorem_proof", "render_type": "Tutorial", "topic_page_url": "/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof", "extended_slug": "math/multivariable-calculus/divergence_theorem_topic/divergence_theorem_proof", "kind": "Topic", "slug": "divergence_theorem_proof"}], "in_knowledge_map": false, "description": "Divergence theorem intuition. Divergence theorem examples and proofs. Types of regions in 3D.", "node_slug": "divergence_theorem_topic", "render_type": "Topic", "topic_page_url": "/math/multivariable-calculus/divergence_theorem_topic", "extended_slug": "math/multivariable-calculus/divergence_theorem_topic", "kind": "Topic", "slug": "divergence_theorem_topic"}], "in_knowledge_map": false, "description": "Think calculus. Then think algebra II and working with two variables in a single equation. Now generalize and combine these two mathematical concepts, and you begin to see some of what Multivariable calculus entails, only now include multi dimensional thinking. Typical concepts or operations may include: limits and continuity, partial differentiation, multiple integration, scalar functions, and fundamental theorem of calculus in multiple dimensions.", "node_slug": "multivariable-calculus", "render_type": "Subject", "topic_page_url": "/math/multivariable-calculus", "extended_slug": "math/multivariable-calculus", "kind": "Topic", "slug": "multivariable-calculus"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/differential-equations/", "id": "differential-equations", "hide": false, "title": "Differential equations", "child_data": [{"kind": "Topic", "id": "xca838a83"}, {"kind": "Topic", "id": "xdd2c724f"}, {"kind": "Topic", "id": "xc75c5653"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/differential-equations/first-order-differential-equations/", "id": "first-order-differential-equations", "hide": false, "title": "First order differential equations", "child_data": [{"kind": "Topic", "id": "xfa44ca25"}, {"kind": "Topic", "id": "x31e3269f"}, {"kind": "Topic", "id": "xf07cb16e"}, {"kind": "Topic", "id": "x004600bc"}, {"kind": "Topic", "id": "xa2300063"}, {"kind": "Topic", "id": "xf9b0193f"}, {"kind": "Topic", "id": "x60db5247"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-equations/first-order-differential-equations/differential-equations-intro/", "id": "differential-equations-intro", "hide": false, "title": "Intro to differential equations", "child_data": [{"kind": "Video", "id": "x64571eb4"}, {"kind": "Video", "id": "x6f28d28d"}, {"kind": "Exercise", "id": "x2519cb0e"}, {"kind": "Video", "id": "xc8a02f3a"}, {"kind": "Video", "id": "x8ea5d072"}, {"kind": "Video", "id": "xb57e783b"}, {"kind": "Exercise", "id": "x9602e7e0"}], "children": [{"path": "khan/math/differential-equations/first-order-differential-equations/differential-equations-intro/differential-equation-introduction/", "id": "6o7b9yyhH7k", "title": "Differential equation introduction", "kind": "Video", "slug": "differential-equation-introduction"}, {"path": "khan/math/differential-equations/first-order-differential-equations/differential-equations-intro/finding-particular-linear-solution-to-differential-equation/", "id": "zid7J4EhZN8", "title": "Finding particular linear solution to differential equation", "kind": "Video", "slug": "finding-particular-linear-solution-to-differential-equation"}, {"path": "khan/math/differential-equations/first-order-differential-equations/differential-equations-intro/introduction-to-differential-equations-and-initial-value-problems/", "id": "introduction-to-differential-equations-and-initial-value-problems", "title": "Introduction to differential equations and initial value problems", "slug": "introduction-to-differential-equations-and-initial-value-problems", "kind": "Exercise"}, {"path": "khan/math/differential-equations/first-order-differential-equations/differential-equations-intro/creating-a-slope-field/", "id": "8Amgakx5aII", "title": "Creating a slope field", "kind": "Video", "slug": "creating-a-slope-field"}, {"path": "khan/math/differential-equations/first-order-differential-equations/differential-equations-intro/slope-field-to-visualize-solutions/", "id": "LoaagZPWvpM", "title": "Slope field to visualize solutions", "kind": "Video", "slug": "slope-field-to-visualize-solutions"}, {"path": "khan/math/differential-equations/first-order-differential-equations/differential-equations-intro/differential-equation-from-slope-field/", "id": "sU5MCM3npXU", "title": "Differential equation from slope field", "kind": "Video", "slug": "differential-equation-from-slope-field"}, {"path": "khan/math/differential-equations/first-order-differential-equations/differential-equations-intro/slope-fields/", "id": "slope-fields", "title": "Slope fields", "slug": "slope-fields", "kind": "Exercise"}], "in_knowledge_map": false, "description": "How is a differential equation different from a regular one? Well, the solution is a function (or a class of functions), not a number. How do you like me now (that is what the differential equation would say in response to your shock)!", "node_slug": "differential-equations-intro", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/first-order-differential-equations/differential-equations-intro", "extended_slug": "math/differential-equations/first-order-differential-equations/differential-equations-intro", "kind": "Topic", "slug": "differential-equations-intro"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-equations/first-order-differential-equations/separable-equations/", "id": "separable-equations", "hide": false, "title": "Separable equations", "child_data": [{"kind": "Video", "id": "x4bbc820f"}, {"kind": "Video", "id": "xc7b88d99"}, {"kind": "Exercise", "id": "x0c4d8e69"}, {"kind": "Video", "id": "24710"}, {"kind": "Video", "id": "24712"}], "children": [{"path": "khan/math/differential-equations/first-order-differential-equations/separable-equations/separable-differential-equations-introduction/", "id": "DL-ozRGDlkY", "title": "Separable differential equations introduction", "kind": "Video", "slug": "separable-differential-equations-introduction"}, {"path": "khan/math/differential-equations/first-order-differential-equations/separable-equations/particular-solution-to-differential-equation-example/", "id": "E444KhRcWSk", "title": "Particular solution to differential equation example", "kind": "Video", "slug": "particular-solution-to-differential-equation-example"}, {"path": "khan/math/differential-equations/first-order-differential-equations/separable-equations/separable-differential-equations_1/", "id": "separable-differential-equations", "title": "Separable differential equations", "slug": "separable-differential-equations_1", "kind": "Exercise"}, {"path": "khan/math/differential-equations/first-order-differential-equations/separable-equations/separable-differential-equations/", "id": "C5-lz0hcqsE", "title": "Old separable differential equations introduction", "kind": "Video", "description": "Introduction to separable differential equations.", "slug": "separable-differential-equations"}, {"path": "khan/math/differential-equations/first-order-differential-equations/separable-equations/separable-differential-equations-2/", "id": "xVWCfMe97ws", "title": "Old separable differential equations example", "kind": "Video", "description": "Another separable differential equation example.", "slug": "separable-differential-equations-2"}], "in_knowledge_map": false, "description": "Arguably the 'easiest' class of differential equations. Here we use our powers of algebra to \"separate\" the y's from the x's on two different sides of the equation and then we just integrate!", "node_slug": "separable-equations", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/first-order-differential-equations/separable-equations", "extended_slug": "math/differential-equations/first-order-differential-equations/separable-equations", "kind": "Topic", "slug": "separable-equations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/first-order-differential-equations/modeling-with-differential-equations/", "id": "modeling-with-differential-equations", "hide": false, "title": "Modeling with differential equations", "child_data": [{"kind": "Video", "id": "x71b1c9d7"}, {"kind": "Video", "id": "xb0ac5177"}, {"kind": "Video", "id": "xb63a9856"}, {"kind": "Video", "id": "x97e7847e"}], "children": [{"path": "khan/math/differential-equations/first-order-differential-equations/modeling-with-differential-equations/modeling-population-with-simple-differential-equation/", "id": "IYFkXWlgC_w", "title": "Modeling population with simple differential equation", "kind": "Video", "slug": "modeling-population-with-simple-differential-equation"}, {"path": "khan/math/differential-equations/first-order-differential-equations/modeling-with-differential-equations/particular-solution-given-initial-conditions-for-population/", "id": "6jqx5uEBs5U", "title": "Particular solution given initial conditions for population", "kind": "Video", "slug": "particular-solution-given-initial-conditions-for-population"}, {"path": "khan/math/differential-equations/first-order-differential-equations/modeling-with-differential-equations/newtons-law-of-cooling/", "id": "IICR-w1jYcA", "title": "Newton's Law of Cooling", "kind": "Video", "slug": "newtons-law-of-cooling"}, {"path": "khan/math/differential-equations/first-order-differential-equations/modeling-with-differential-equations/applying-newtons-law-of-cooling-to-warm-oatmeal/", "id": "jH5qflAe3C8", "title": "Applying Newton's Law of Cooling to warm oatmeal", "kind": "Video", "slug": "applying-newtons-law-of-cooling-to-warm-oatmeal"}], "in_knowledge_map": false, "description": "Now that you know how to find solutions to separable differential equations, we can use this skill to model some real world phenomena like population growth and how things might cool down.", "node_slug": "modeling-with-differential-equations", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/first-order-differential-equations/modeling-with-differential-equations", "extended_slug": "math/differential-equations/first-order-differential-equations/modeling-with-differential-equations", "kind": "Topic", "slug": "modeling-with-differential-equations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/first-order-differential-equations/logistic-differential-equation/", "id": "logistic-differential-equation", "hide": false, "title": "Logistic differential equation and function", "child_data": [{"kind": "Video", "id": "xff25b528"}, {"kind": "Video", "id": "xb9599623"}, {"kind": "Video", "id": "x152ee0ed"}, {"kind": "Video", "id": "xd9cb2b32"}, {"kind": "Video", "id": "x0c018898"}], "children": [{"path": "khan/math/differential-equations/first-order-differential-equations/logistic-differential-equation/modeling-population-with-differential-equations/", "id": "_JpS8k1a9yE", "title": "Modeling population as an exponential function", "kind": "Video", "slug": "modeling-population-with-differential-equations"}, {"path": "khan/math/differential-equations/first-order-differential-equations/logistic-differential-equation/logistic-differential-equation-intuition/", "id": "oiDvNs15tkE", "title": "Logistic differential equation intuition", "kind": "Video", "slug": "logistic-differential-equation-intuition"}, {"path": "khan/math/differential-equations/first-order-differential-equations/logistic-differential-equation/solving-logistic-differential-equation-part-1/", "id": "j_Taf2Tgggo", "title": "Solving the logistic differential equation part 1", "kind": "Video", "slug": "solving-logistic-differential-equation-part-1"}, {"path": "khan/math/differential-equations/first-order-differential-equations/logistic-differential-equation/solving-logistic-differential-equation-part2/", "id": "NU1v-8VRirU", "title": "Solving the logistic differential equation part 2", "kind": "Video", "slug": "solving-logistic-differential-equation-part2"}, {"path": "khan/math/differential-equations/first-order-differential-equations/logistic-differential-equation/logistic-function-application/", "id": "-fIsaqN-aaQ", "title": "Logistic function application", "kind": "Video", "slug": "logistic-function-application"}], "in_knowledge_map": false, "description": "Can population grow exponentially forever? Malthus would say \"no\". Well how do you model that mathematically. The logistic differential equation and logistic function are there to rescue us!", "node_slug": "logistic-differential-equation", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/first-order-differential-equations/logistic-differential-equation", "extended_slug": "math/differential-equations/first-order-differential-equations/logistic-differential-equation", "kind": "Topic", "slug": "logistic-differential-equation"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/differential-equations/first-order-differential-equations/eulers-method-tutorial/", "id": "eulers-method-tutorial", "hide": false, "title": "Euler's Method", "child_data": [{"kind": "Video", "id": "x5c5705d2"}, {"kind": "Video", "id": "x2d4a1225"}, {"kind": "Scratchpad", "id": "6035057024434176"}, {"kind": "Video", "id": "x7ac26ce4"}, {"kind": "Exercise", "id": "x0b4c0b9b"}], "children": [{"path": "khan/math/differential-equations/first-order-differential-equations/eulers-method-tutorial/eulers-method/", "id": "q87L9R9v274", "title": "Euler's method", "kind": "Video", "slug": "eulers-method"}, {"path": "khan/math/differential-equations/first-order-differential-equations/eulers-method-tutorial/eulers-method-program-code/", "id": "SJVhtIGAkKs", "title": "Euler's method program code", "kind": "Video", "slug": "eulers-method-program-code"}, {"path": "khan/math/differential-equations/first-order-differential-equations/eulers-method-tutorial/example-eulers-method-exercise/", "id": "_-a-yNubpk8", "title": "Example Euler's method exercise", "kind": "Video", "slug": "example-eulers-method-exercise"}, {"path": "khan/math/differential-equations/first-order-differential-equations/eulers-method-tutorial/euler-s-method/", "id": "euler-s-method", "title": "Euler's method", "slug": "euler-s-method", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Most differential equations cannot be solved by \"hand\" (through analytical means). However, this doesn't mean that we have to give up! As we'll see in this tutorial, we can use numerical methods to approximate a solution to a differential equation. In particular, we'll learn about Euler's Method which is a fairly intuitive way to do this!", "node_slug": "eulers-method-tutorial", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/first-order-differential-equations/eulers-method-tutorial", "extended_slug": "math/differential-equations/first-order-differential-equations/eulers-method-tutorial", "kind": "Topic", "slug": "eulers-method-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/", "id": "exact-equations", "hide": false, "title": "Exact equations and integrating factors", "child_data": [{"kind": "Video", "id": "24714"}, {"kind": "Video", "id": "24716"}, {"kind": "Video", "id": "24718"}, {"kind": "Video", "id": "24720"}, {"kind": "Video", "id": "24722"}, {"kind": "Video", "id": "24724"}, {"kind": "Video", "id": "24726"}], "children": [{"path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/exact-equations-intuition-1-proofy/", "id": "iEpqcdaJNTQ", "title": "Exact equations intuition 1 (proofy)", "kind": "Video", "description": "Chain rule using partial derivatives (not a proof; more intuition).", "slug": "exact-equations-intuition-1-proofy"}, {"path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/exact-equations-intuition-2-proofy/", "id": "a7wYAtMjORQ", "title": "Exact equations intuition 2 (proofy)", "kind": "Video", "description": "More intuitive building blocks for exact equations.", "slug": "exact-equations-intuition-2-proofy"}, {"path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/exact-equations-example-1/", "id": "Pb04ntcDJcQ", "title": "Exact equations example 1", "kind": "Video", "description": "First example of solving an exact differential equation.", "slug": "exact-equations-example-1"}, {"path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/exact-equations-example-2/", "id": "utQi1ZhF__Q", "title": "Exact equations example 2", "kind": "Video", "description": "Some more exact equation examples", "slug": "exact-equations-example-2"}, {"path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/exact-equations-example-3/", "id": "eu_GFuU7tLI", "title": "Exact equations example 3", "kind": "Video", "description": "One more exact equation example", "slug": "exact-equations-example-3"}, {"path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/integrating-factors-1/", "id": "j511hg7Hlbg", "title": "Integrating factors 1", "kind": "Video", "description": "Using an integrating factor to make a differential equation exact", "slug": "integrating-factors-1"}, {"path": "khan/math/differential-equations/first-order-differential-equations/exact-equations/integrating-factors-2/", "id": "0NyeDUhKwBE", "title": "Integrating factors 2", "kind": "Video", "description": "Now that we've made the equation exact, let's solve it!", "slug": "integrating-factors-2"}], "in_knowledge_map": false, "description": "A very special class of often non-linear differential equations. If you know a bit about partial derivatives, this tutorial will help you know how to 'exactly' solve these!", "node_slug": "exact-equations", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/first-order-differential-equations/exact-equations", "extended_slug": "math/differential-equations/first-order-differential-equations/exact-equations", "kind": "Topic", "slug": "exact-equations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/first-order-differential-equations/homogeneous-equations/", "id": "homogeneous-equations", "hide": false, "title": "Homogeneous equations", "child_data": [{"kind": "Video", "id": "24728"}, {"kind": "Video", "id": "24730"}], "children": [{"path": "khan/math/differential-equations/first-order-differential-equations/homogeneous-equations/first-order-homegenous-equations/", "id": "9Wfn-WWV1aY", "title": "First order homogenous equations", "kind": "Video", "description": "Introduction to first order homogenous equations.", "slug": "first-order-homegenous-equations"}, {"path": "khan/math/differential-equations/first-order-differential-equations/homogeneous-equations/first-order-homogenous-equations-2/", "id": "6YRGEsQWZzY", "title": "First order homogeneous equations 2", "kind": "Video", "description": "Another example of using substitution to solve a first order homogeneous differential equations.", "slug": "first-order-homogenous-equations-2"}], "in_knowledge_map": false, "description": "In this equations, all of the fat is fully mixed in so it doesn't collect at the top. No (that would be homogenized equations).\n\nActually, the term \"homogeneous\" is way overused in differential equations. In this tutorial, we'll look at equations of the form y'=(F(y/x)).", "node_slug": "homogeneous-equations", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/first-order-differential-equations/homogeneous-equations", "extended_slug": "math/differential-equations/first-order-differential-equations/homogeneous-equations", "kind": "Topic", "slug": "homogeneous-equations"}], "in_knowledge_map": false, "description": "Differential equations with only first derivatives.", "node_slug": "first-order-differential-equations", "render_type": "Topic", "topic_page_url": "/math/differential-equations/first-order-differential-equations", "extended_slug": "math/differential-equations/first-order-differential-equations", "kind": "Topic", "slug": "first-order-differential-equations"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/differential-equations/second-order-differential-equations/", "id": "second-order-differential-equations", "hide": false, "title": "Second order linear equations", "child_data": [{"kind": "Topic", "id": "x4ed17320"}, {"kind": "Topic", "id": "x3286231e"}, {"kind": "Topic", "id": "x42e06477"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order/", "id": "linear-homogeneous-2nd-order", "hide": false, "title": "Linear homogeneous equations", "child_data": [{"kind": "Video", "id": "24732"}, {"kind": "Video", "id": "24734"}, {"kind": "Video", "id": "24736"}, {"kind": "Video", "id": "24738"}], "children": [{"path": "khan/math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order/2nd-order-linear-homogeneous-differential-equations-1/", "id": "UFWAu8Ptth0", "title": "2nd order linear homogeneous differential equations 1", "kind": "Video", "description": "Introduction to 2nd order, linear, homogeneous differential equations with constant coefficients.", "slug": "2nd-order-linear-homogeneous-differential-equations-1"}, {"path": "khan/math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order/2nd-order-linear-homogeneous-differential-equations-2/", "id": "SPVqgkOZMAc", "title": "2nd order linear homogeneous differential equations 2", "kind": "Video", "description": "Let's find the general solution!", "slug": "2nd-order-linear-homogeneous-differential-equations-2"}, {"path": "khan/math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order/2nd-order-linear-homogeneous-differential-equations-3/", "id": "UyCwAFQt4v0", "title": "2nd order linear homogeneous differential equations 3", "kind": "Video", "description": "Let's use some initial conditions to solve for the particular solution", "slug": "2nd-order-linear-homogeneous-differential-equations-3"}, {"path": "khan/math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order/2nd-order-linear-homogeneous-differential-equations-4/", "id": "3uO_uPb9H8w", "title": "2nd order linear homogeneous differential equations 4", "kind": "Video", "description": "Another example with initial conditions!", "slug": "2nd-order-linear-homogeneous-differential-equations-4"}], "in_knowledge_map": false, "description": "To make your life interesting, we'll now use the word \"homogeneous\" in a way that is not connected to the way we used the term when talking about first-order equations. As you'll see, second order linear homogeneous equations can be solved with a little bit of algebra (and a lot of love).", "node_slug": "linear-homogeneous-2nd-order", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order", "extended_slug": "math/differential-equations/second-order-differential-equations/linear-homogeneous-2nd-order", "kind": "Topic", "slug": "linear-homogeneous-2nd-order"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation/", "id": "complex-roots-characteristic-equation", "hide": false, "title": "Complex and repeated roots of characteristic equation", "child_data": [{"kind": "Video", "id": "24740"}, {"kind": "Video", "id": "24742"}, {"kind": "Video", "id": "24744"}, {"kind": "Video", "id": "24746"}, {"kind": "Video", "id": "24748"}], "children": [{"path": "khan/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation/complex-roots-of-the-characteristic-equations-1/", "id": "6xEO4BeawzA", "title": "Complex roots of the characteristic equations 1", "kind": "Video", "description": "What happens when the characteristic equations has complex roots?!", "slug": "complex-roots-of-the-characteristic-equations-1"}, {"path": "khan/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation/complex-roots-of-the-characteristic-equations-2/", "id": "jJyRrIZ595c", "title": "Complex roots of the characteristic equations 2", "kind": "Video", "description": "What happens when the characteristic equation has complex roots?", "slug": "complex-roots-of-the-characteristic-equations-2"}, {"path": "khan/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation/complex-roots-of-the-characteristic-equations-3/", "id": "rGaM6pwqhB0", "title": "Complex roots of the characteristic equations 3", "kind": "Video", "description": "Lets do an example with initial conditions!", "slug": "complex-roots-of-the-characteristic-equations-3"}, {"path": "khan/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation/repeated-roots-of-the-characteristic-equation/", "id": "NW9JfMvIsxw", "title": "Repeated roots of the characteristic equation", "kind": "Video", "description": "What happens when the characteristic equation only has 1 repeated root?", "slug": "repeated-roots-of-the-characteristic-equation"}, {"path": "khan/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation/repeated-roots-of-the-characterisitic-equations-part-2/", "id": "YezsgIlcb68", "title": "Repeated roots of the characteristic equations part 2", "kind": "Video", "description": "An example where we use initial conditions to solve a repeated-roots differential equation.", "slug": "repeated-roots-of-the-characterisitic-equations-part-2"}], "in_knowledge_map": false, "description": "Thinking about what happens when you have complex or repeated roots for your characteristic equation.", "node_slug": "complex-roots-characteristic-equation", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation", "extended_slug": "math/differential-equations/second-order-differential-equations/complex-roots-characteristic-equation", "kind": "Topic", "slug": "complex-roots-characteristic-equation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/second-order-differential-equations/undetermined-coefficients/", "id": "undetermined-coefficients", "hide": false, "title": "Method of undetermined coefficients", "child_data": [{"kind": "Video", "id": "24750"}, {"kind": "Video", "id": "24752"}, {"kind": "Video", "id": "24754"}, {"kind": "Video", "id": "24756"}], "children": [{"path": "khan/math/differential-equations/second-order-differential-equations/undetermined-coefficients/undetermined-coefficients-1/", "id": "znE4Nq9NJCQ", "title": "Undetermined coefficients 1", "kind": "Video", "description": "Using the method of undetermined coefficients to solve nonhomogeneous linear differential equations.", "slug": "undetermined-coefficients-1"}, {"path": "khan/math/differential-equations/second-order-differential-equations/undetermined-coefficients/undetermined-coefficients-2/", "id": "hbJ2o9EUmJ0", "title": "Undetermined coefficients 2", "kind": "Video", "description": "Another example using undetermined coefficients.", "slug": "undetermined-coefficients-2"}, {"path": "khan/math/differential-equations/second-order-differential-equations/undetermined-coefficients/undetermined-coefficients-3/", "id": "I3vIAzMcm4Y", "title": "Undetermined coefficients 3", "kind": "Video", "description": "Another example where the nonhomogeneous part is a polynomial", "slug": "undetermined-coefficients-3"}, {"path": "khan/math/differential-equations/second-order-differential-equations/undetermined-coefficients/undetermined-coefficients-4/", "id": "vAepSNDLZRM", "title": "Undetermined coefficients 4", "kind": "Video", "description": "Putting it all together!", "slug": "undetermined-coefficients-4"}], "in_knowledge_map": false, "description": "Now we can apply some of our second order linear differential equations skills to nonhomogeneous equations. Yay!", "node_slug": "undetermined-coefficients", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/second-order-differential-equations/undetermined-coefficients", "extended_slug": "math/differential-equations/second-order-differential-equations/undetermined-coefficients", "kind": "Topic", "slug": "undetermined-coefficients"}], "in_knowledge_map": false, "description": "Linear differential equations that contain second derivatives", "node_slug": "second-order-differential-equations", "render_type": "Topic", "topic_page_url": "/math/differential-equations/second-order-differential-equations", "extended_slug": "math/differential-equations/second-order-differential-equations", "kind": "Topic", "slug": "second-order-differential-equations"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/differential-equations/laplace-transform/", "id": "laplace-transform", "hide": false, "title": "Laplace transform", "child_data": [{"kind": "Topic", "id": "xe846e7de"}, {"kind": "Topic", "id": "x15ef2c18"}, {"kind": "Topic", "id": "x38bc63ac"}, {"kind": "Topic", "id": "x230ca1cb"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/laplace-transform/laplace-transform-tutorial/", "id": "laplace-transform-tutorial", "hide": false, "title": "Laplace transform", "child_data": [{"kind": "Video", "id": "24758"}, {"kind": "Video", "id": "24760"}, {"kind": "Video", "id": "24762"}, {"kind": "Video", "id": "24764"}], "children": [{"path": "khan/math/differential-equations/laplace-transform/laplace-transform-tutorial/laplace-transform-1/", "id": "OiNh2DswFt4", "title": "Laplace transform 1", "kind": "Video", "description": "Introduction to the Laplace Transform", "slug": "laplace-transform-1"}, {"path": "khan/math/differential-equations/laplace-transform/laplace-transform-tutorial/laplace-transform-2/", "id": "33TYoybjqPg", "title": "Laplace transform 2", "kind": "Video", "description": "Laplace transform of e^at", "slug": "laplace-transform-2"}, {"path": "khan/math/differential-equations/laplace-transform/laplace-transform-tutorial/laplace-transform-3-l-sin-at/", "id": "gMcs6RF_LrQ", "title": "L{sin(at)} - transform of sin(at)", "kind": "Video", "description": "Laplace Transform of sin(at) (part 1)", "slug": "laplace-transform-3-l-sin-at"}, {"path": "khan/math/differential-equations/laplace-transform/laplace-transform-tutorial/laplace-transform-4/", "id": "-cApVwKR1Ps", "title": "Part 2 of the transform of the sin(at)", "kind": "Video", "description": "Part 2 of getting the Laplace transform of sin(at)", "slug": "laplace-transform-4"}], "in_knowledge_map": false, "description": "We now use one of the coolest techniques in mathematics to transform differential equations into algebraic ones. You'll also learn about transforms in general!", "node_slug": "laplace-transform-tutorial", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/laplace-transform/laplace-transform-tutorial", "extended_slug": "math/differential-equations/laplace-transform/laplace-transform-tutorial", "kind": "Topic", "slug": "laplace-transform-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/", "id": "properties-of-laplace-transform", "hide": false, "title": "Properties of the Laplace transform", "child_data": [{"kind": "Video", "id": "24766"}, {"kind": "Video", "id": "24768"}, {"kind": "Video", "id": "24774"}, {"kind": "Video", "id": "24778"}, {"kind": "Video", "id": "24780"}, {"kind": "Video", "id": "24782"}, {"kind": "Video", "id": "24784"}, {"kind": "Video", "id": "24788"}, {"kind": "Video", "id": "24790"}], "children": [{"path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/laplace-transform-5/", "id": "E2VxbufzuWQ", "title": "Laplace as linear operator and Laplace of derivatives", "kind": "Video", "description": "Useful properties of the Laplace Transform", "slug": "laplace-transform-5"}, {"path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/laplace-transform-6/", "id": "fyJkXBvcA2Q", "title": "Laplace transform of cos t and polynomials", "kind": "Video", "description": "Laplace transform of cosine and polynomials!", "slug": "laplace-transform-6"}, {"path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/more-laplace-transform-tools/", "id": "_X_QwpXsdOs", "title": "\"Shifting\" transform by multiplying function by exponential", "kind": "Video", "description": "A grab bag of things to know about the Laplace Transform.", "slug": "more-laplace-transform-tools"}, {"path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/laplace-transform-of-l-t/", "id": "qhKJ1DG9kYY", "title": "Laplace transform of t: L{t}", "kind": "Video", "description": "Determining the Laplace Transform of t", "slug": "laplace-transform-of-l-t"}, {"path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/laplace-transform-of-t-n-l-t-n/", "id": "pZIaUx3UQoA", "title": "Laplace transform of t^n: L{t^n}", "kind": "Video", "description": "Laplace Transform of t^n: L{t^n}", "slug": "laplace-transform-of-t-n-l-t-n"}, {"path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/laplace-transform-of-the-unit-step-function/", "id": "4Mr7aEHQr8E", "title": "Laplace transform of the unit step function", "kind": "Video", "description": "Introduction to the unit step function and its Laplace Transform", "slug": "laplace-transform-of-the-unit-step-function"}, {"path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/inverse-laplace-examples/", "id": "BbqbvSig6Mc", "title": "Inverse Laplace examples", "kind": "Video", "description": "Using our toolkit to take some inverse Laplace Transforms", "slug": "inverse-laplace-examples"}, {"path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/dirac-delta-function/", "id": "4qfdCwys2ew", "title": "Dirac delta function", "kind": "Video", "description": "Introduction to the Dirac Delta Function", "slug": "dirac-delta-function"}, {"path": "khan/math/differential-equations/laplace-transform/properties-of-laplace-transform/laplace-transform-of-the-dirac-delta-function/", "id": "vhfjEpQWWeE", "title": "Laplace transform of the dirac delta function", "kind": "Video", "description": "Figuring out the Laplace Transform of the Dirac Delta Function", "slug": "laplace-transform-of-the-dirac-delta-function"}], "in_knowledge_map": false, "description": "You know how to use the definition of the Laplace transform. In this tutorial, we'll explore some of the properties of the transform that will start to make it clear why they are so useful for differential equations.\n\nThis tutorial is paired well with the tutorial on using the \"Laplace transform to solve differential equations\". In fact you might come back to this tutorial over and over as you solve more and more problems.", "node_slug": "properties-of-laplace-transform", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/laplace-transform/properties-of-laplace-transform", "extended_slug": "math/differential-equations/laplace-transform/properties-of-laplace-transform", "kind": "Topic", "slug": "properties-of-laplace-transform"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/laplace-transform/laplace-transform-to-solve-differential-equation/", "id": "laplace-transform-to-solve-differential-equation", "hide": false, "title": "Laplace transform to solve a differential equation", "child_data": [{"kind": "Video", "id": "24770"}, {"kind": "Video", "id": "24772"}, {"kind": "Video", "id": "24776"}, {"kind": "Video", "id": "24786"}], "children": [{"path": "khan/math/differential-equations/laplace-transform/laplace-transform-to-solve-differential-equation/laplace-transform-to-solve-an-equation/", "id": "3uYb-RhM7lU", "title": "Laplace transform to solve an equation", "kind": "Video", "description": "Using the Laplace Transform to solve an equation we already knew how to solve.", "slug": "laplace-transform-to-solve-an-equation"}, {"path": "khan/math/differential-equations/laplace-transform/laplace-transform-to-solve-differential-equation/laplace-transform-solves-an-equation-2/", "id": "EdQ7Q9VoF44", "title": "Laplace transform solves an equation 2", "kind": "Video", "description": "Second part of using the Laplace Transform to solve a differential equation.", "slug": "laplace-transform-solves-an-equation-2"}, {"path": "khan/math/differential-equations/laplace-transform/laplace-transform-to-solve-differential-equation/using-the-laplace-transform-to-solve-a-nonhomogenous-eq/", "id": "nlUG4OKN1IY", "title": "Using the Laplace transform to solve a nonhomogeneous eq", "kind": "Video", "description": "Solving a non-homogeneous differential equation using the Laplace Transform", "slug": "using-the-laplace-transform-to-solve-a-nonhomogenous-eq"}, {"path": "khan/math/differential-equations/laplace-transform/laplace-transform-to-solve-differential-equation/laplace-step-function-differential-equation/", "id": "R0JY8oWsuOY", "title": "Laplace/step function differential equation", "kind": "Video", "description": "Hairy differential equation involving a step function that we use the Laplace Transform to solve.", "slug": "laplace-step-function-differential-equation"}], "in_knowledge_map": false, "description": "You know a good bit about taking Laplace transform and useful properties of the transform. You are dying to actually apply these skills to an actual differential equation. Wait no longer!", "node_slug": "laplace-transform-to-solve-differential-equation", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/laplace-transform/laplace-transform-to-solve-differential-equation", "extended_slug": "math/differential-equations/laplace-transform/laplace-transform-to-solve-differential-equation", "kind": "Topic", "slug": "laplace-transform-to-solve-differential-equation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/differential-equations/laplace-transform/convolution-integral/", "id": "convolution-integral", "hide": false, "title": "The convolution integral", "child_data": [{"kind": "Video", "id": "24792"}, {"kind": "Video", "id": "24794"}, {"kind": "Video", "id": "24796"}], "children": [{"path": "khan/math/differential-equations/laplace-transform/convolution-integral/introduction-to-the-convolution/", "id": "IW4Reburjpc", "title": "Introduction to the convolution", "kind": "Video", "description": "Introduction to the Convolution", "slug": "introduction-to-the-convolution"}, {"path": "khan/math/differential-equations/laplace-transform/convolution-integral/the-convolution-and-the-laplace-transform/", "id": "TJgBEI3drUc", "title": "The convolution and the laplace transform", "kind": "Video", "description": "Understanding how the product of the Transforms of two functions relates to their convolution.", "slug": "the-convolution-and-the-laplace-transform"}, {"path": "khan/math/differential-equations/laplace-transform/convolution-integral/using-the-convolution-theorem-to-solve-an-initial-value-prob/", "id": "rfyq32mHcYs", "title": "Using the convolution theorem to solve an initial value prob", "kind": "Video", "description": "Using the Convolution Theorem to solve an initial value problem", "slug": "using-the-convolution-theorem-to-solve-an-initial-value-prob"}], "in_knowledge_map": false, "description": "This tutorial won't be as convoluted as you might suspect. We'll see what multiplying transforms in the s-domain give us in the time domain.", "node_slug": "convolution-integral", "render_type": "Tutorial", "topic_page_url": "/math/differential-equations/laplace-transform/convolution-integral", "extended_slug": "math/differential-equations/laplace-transform/convolution-integral", "kind": "Topic", "slug": "convolution-integral"}], "in_knowledge_map": false, "description": "Transforms and the Laplace transform in particular. Convolution integrals.", "node_slug": "laplace-transform", "render_type": "Topic", "topic_page_url": "/math/differential-equations/laplace-transform", "extended_slug": "math/differential-equations/laplace-transform", "kind": "Topic", "slug": "laplace-transform"}], "in_knowledge_map": false, "description": "differential equations, Separable equations, exact equations, integrating factors, Homogeneous equations", "node_slug": "differential-equations", "render_type": "Subject", "topic_page_url": "/math/differential-equations", "extended_slug": "math/differential-equations", "kind": "Topic", "slug": "differential-equations"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/linear-algebra/", "id": "linear-algebra", "hide": false, "title": "Linear algebra", "child_data": [{"kind": "Topic", "id": "x5b1b89e0"}, {"kind": "Topic", "id": "x7a8cfdaa"}, {"kind": "Topic", "id": "xa2a6b742"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/linear-algebra/vectors_and_spaces/", "id": "vectors_and_spaces", "hide": false, "title": "Vectors and spaces", "child_data": [{"kind": "Topic", "id": "x7291eb9f"}, {"kind": "Topic", "id": "x5767834a"}, {"kind": "Topic", "id": "x364bd4b8"}, {"kind": "Topic", "id": "x77d03ae7"}, {"kind": "Topic", "id": "xfa24ce4a"}, {"kind": "Topic", "id": "x1bd580cd"}, {"kind": "Topic", "id": "xb622e18e"}], "children": [{"icon_src": "/images/power-mode/badges/vectors-40x40.png", "contains": ["Video", "Exercise"], "path": "khan/math/linear-algebra/vectors_and_spaces/vectors/", "id": "vectors", "hide": false, "title": "Vectors", "child_data": [{"kind": "Video", "id": "xbb63d308"}, {"kind": "Video", "id": "x184489c0"}, {"kind": "Video", "id": "x6bc2f1ae"}, {"kind": "Video", "id": "xf85df5ef"}, {"kind": "Video", "id": "25221"}, {"kind": "Exercise", "id": "75894985"}, {"kind": "Video", "id": "xad013660"}, {"kind": "Exercise", "id": "x875a4b7a"}, {"kind": "Exercise", "id": "67078190"}, {"kind": "Exercise", "id": "x81c1307c"}, {"kind": "Video", "id": "25223"}], "children": [{"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/vector-introduction-linear-algebra/", "id": "br7tS1t2SFE", "title": "Vector intro for linear algebra", "kind": "Video", "slug": "vector-introduction-linear-algebra"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/real-coordinate-spaces/", "id": "lCsjJbZHhHU", "title": "Real coordinate spaces", "kind": "Video", "slug": "real-coordinate-spaces"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/adding-vectors/", "id": "8QihetGj3pg", "title": "Adding vectors", "kind": "Video", "slug": "adding-vectors"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/multiplying-vector-by-scalar/", "id": "ZN7YaSbY3-w", "title": "Multiplying a vector by a scalar", "kind": "Video", "slug": "multiplying-vector-by-scalar"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/linear-algebra-vector-examples/", "id": "r4bH66vYjss", "title": "Vector examples", "kind": "Video", "description": "Visually understanding basic vector operations", "slug": "linear-algebra-vector-examples"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/scaling_vectors/", "id": "scaling_vectors", "title": "Scaling vectors", "slug": "scaling_vectors", "kind": "Exercise"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/intro-unit-vector-notation/", "id": "9ylUcCOTH8Y", "title": "Unit vector notation", "kind": "Video", "slug": "intro-unit-vector-notation"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/unit-vector/", "id": "unit-vector", "title": "Unit vectors", "slug": "unit-vector", "kind": "Exercise"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/adding_vectors/", "id": "adding_vectors", "title": "Adding and subtracting vectors in rectangular form", "slug": "adding_vectors", "kind": "Exercise"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/adding-vectors-in-magnitude-and-direction-form/", "id": "adding-vectors-in-magnitude-and-direction-form", "title": "Adding vectors in magnitude and direction form", "slug": "adding-vectors-in-magnitude-and-direction-form", "kind": "Exercise"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/vectors/linear-algebra-parametric-representations-of-lines/", "id": "hWhs2cIj7Cw", "title": "Parametric representations of lines", "kind": "Video", "description": "Parametric Representations of Lines in R2 and R3", "slug": "linear-algebra-parametric-representations-of-lines"}], "in_knowledge_map": true, "description": "We will begin our journey through linear algebra by defining and conceptualizing what a vector is (rather than starting with matrices and matrix operations like in a more basic algebra course) and defining some basic operations (like addition, subtraction and scalar multiplication).", "node_slug": "vectors", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/vectors_and_spaces/vectors", "extended_slug": "math/linear-algebra/vectors_and_spaces/vectors", "kind": "Topic", "slug": "vectors"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/vectors_and_spaces/linear_combinations/", "id": "linear_combinations", "hide": false, "title": "Linear combinations and spans", "child_data": [{"kind": "Video", "id": "25225"}], "children": [{"path": "khan/math/linear-algebra/vectors_and_spaces/linear_combinations/linear-combinations-and-span/", "id": "Qm_OS-8COwU", "title": "Linear combinations and span", "kind": "Video", "description": "Understanding linear combinations and spans of vectors", "slug": "linear-combinations-and-span"}], "in_knowledge_map": false, "description": "Given a set of vectors, what other vectors can you create by adding and/or subtracting scalar multiples of those vectors. The set of vectors that you can create through these linear combinations of the original set is called the \"span\" of the set.", "node_slug": "linear_combinations", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/vectors_and_spaces/linear_combinations", "extended_slug": "math/linear-algebra/vectors_and_spaces/linear_combinations", "kind": "Topic", "slug": "linear_combinations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/vectors_and_spaces/linear_independence/", "id": "linear_independence", "hide": false, "title": "Linear dependence and independence", "child_data": [{"kind": "Video", "id": "25227"}, {"kind": "Video", "id": "25229"}, {"kind": "Video", "id": "25231"}], "children": [{"path": "khan/math/linear-algebra/vectors_and_spaces/linear_independence/linear-algebra-introduction-to-linear-independence/", "id": "CrV1xCWdY-g", "title": "Introduction to linear independence", "kind": "Video", "description": "Introduction to linear dependence and independence", "slug": "linear-algebra-introduction-to-linear-independence"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/linear_independence/more-on-linear-independence/", "id": "Alhcv5d_XOs", "title": "More on linear independence", "kind": "Video", "description": "More examples determining linear dependence or independence.", "slug": "more-on-linear-independence"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/linear_independence/span-and-linear-independence-example/", "id": "9kW6zFK5E5c", "title": "Span and linear independence example", "kind": "Video", "description": "Determining whether 3 vectors are linearly independent and/or span R3", "slug": "span-and-linear-independence-example"}], "in_knowledge_map": false, "description": "If no vector in a set can be created from a linear combination of the other vectors in the set, then we say that the set is linearly independent. Linearly independent sets are great because there aren't any extra, unnecessary vectors lying around in the set. :)", "node_slug": "linear_independence", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/vectors_and_spaces/linear_independence", "extended_slug": "math/linear-algebra/vectors_and_spaces/linear_independence", "kind": "Topic", "slug": "linear_independence"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/vectors_and_spaces/subspace_basis/", "id": "subspace_basis", "hide": false, "title": "Subspaces and the basis for a subspace", "child_data": [{"kind": "Video", "id": "25233"}, {"kind": "Video", "id": "25235"}], "children": [{"path": "khan/math/linear-algebra/vectors_and_spaces/subspace_basis/linear-subspaces/", "id": "pMFv6liWK4M", "title": "Linear subspaces", "kind": "Video", "description": "Introduction to linear subspaces of Rn", "slug": "linear-subspaces"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/subspace_basis/linear-algebra-basis-of-a-subspace/", "id": "zntNi3-ybfQ", "title": "Basis of a subspace", "kind": "Video", "description": "Understanding the definition of a basis of a subspace", "slug": "linear-algebra-basis-of-a-subspace"}], "in_knowledge_map": false, "description": "In this tutorial, we'll define what a \"subspace\" is --essentially a subset of vectors that has some special properties. We'll then think of a set of vectors that can most efficiently be use to construct a subspace which we will call a \"basis\".", "node_slug": "subspace_basis", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/vectors_and_spaces/subspace_basis", "extended_slug": "math/linear-algebra/vectors_and_spaces/subspace_basis", "kind": "Topic", "slug": "subspace_basis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/", "id": "dot_cross_products", "hide": false, "title": "Vector dot and cross products", "child_data": [{"kind": "Video", "id": "25237"}, {"kind": "Video", "id": "25239"}, {"kind": "Video", "id": "25241"}, {"kind": "Video", "id": "25243"}, {"kind": "Video", "id": "25245"}, {"kind": "Video", "id": "25247"}, {"kind": "Video", "id": "25249"}, {"kind": "Video", "id": "25251"}, {"kind": "Video", "id": "25253"}, {"kind": "Video", "id": "8187461"}, {"kind": "Video", "id": "8187465"}, {"kind": "Video", "id": "8187466"}, {"kind": "Video", "id": "8187467"}], "children": [{"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/vector-dot-product-and-vector-length/", "id": "WNuIhXo39_k", "title": "Vector dot product and vector length", "kind": "Video", "description": "Definitions of the vector dot product and vector length", "slug": "vector-dot-product-and-vector-length"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/proving-vector-dot-product-properties/", "id": "rVQ3G9epCjw", "title": "Proving vector dot product properties", "kind": "Video", "description": "Proving the \"associative\", \"distributive\" and \"commutative\" properties for vector dot products.", "slug": "proving-vector-dot-product-properties"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/proof-of-the-cauchy-schwarz-inequality/", "id": "r2PogGDl8_U", "title": "Proof of the Cauchy-Schwarz inequality", "kind": "Video", "description": "Proof of the Cauchy-Schwarz Inequality", "slug": "proof-of-the-cauchy-schwarz-inequality"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/linear-algebra-vector-triangle-inequality/", "id": "PsNidCBr5II", "title": "Vector triangle inequality", "kind": "Video", "description": "Proving the triangle inequality for vectors in Rn", "slug": "linear-algebra-vector-triangle-inequality"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/defining-the-angle-between-vectors/", "id": "5AWob_z74Ks", "title": "Defining the angle between vectors", "kind": "Video", "description": "Introducing the idea of an angle between two vectors", "slug": "defining-the-angle-between-vectors"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/defining-a-plane-in-r3-with-a-point-and-normal-vector/", "id": "UJxgcVaNTqY", "title": "Defining a plane in R3 with a point and normal vector", "kind": "Video", "description": "Determining the equation for a plane in R3 using a point on the plane and a normal vector", "slug": "defining-a-plane-in-r3-with-a-point-and-normal-vector"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/linear-algebra-cross-product-introduction/", "id": "pJzmiywagfY", "title": "Cross product introduction", "kind": "Video", "description": "Introduction to the cross product", "slug": "linear-algebra-cross-product-introduction"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/proof-relationship-between-cross-product-and-sin-of-angle/", "id": "7MKA2QlKvHc", "title": "Proof: Relationship between cross product and sin of angle", "kind": "Video", "description": "Proof: Relationship between the cross product and sin of angle between vectors", "slug": "proof-relationship-between-cross-product-and-sin-of-angle"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/dot-and-cross-product-comparison-intuition/", "id": "tdwFdzVqito", "title": "Dot and cross product comparison/intuition", "kind": "Video", "description": "Dot and Cross Product Comparison/Intuition", "slug": "dot-and-cross-product-comparison-intuition"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/vector-triple-product-expansion-very-optional/", "id": "b7JTVLc_aMk", "title": "Vector triple product expansion (very optional)", "kind": "Video", "description": "A shortcut for having to evaluate the cross product of three vectors", "slug": "vector-triple-product-expansion-very-optional"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/normal-vector-from-plane-equation/", "id": "gw-4wltP5tY", "title": "Normal vector from plane equation", "kind": "Video", "description": "Figuring out a normal vector to a plane from its equation", "slug": "normal-vector-from-plane-equation"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/point-distance-to-plane/", "id": "7rIFO8hct9g", "title": "Point distance to plane", "kind": "Video", "description": "Distance between a point and a plane in three dimensions", "slug": "point-distance-to-plane"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/dot_cross_products/distance-between-planes/", "id": "v8plb6V8BQo", "title": "Distance between planes", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 51 Distance Between Planes", "slug": "distance-between-planes"}], "in_knowledge_map": false, "description": "In this tutorial, we define two ways to \"multiply\" vectors-- the dot product and the cross product. As we progress, we'll get an intuitive feel for their meaning, how they can used and how the two vector products relate to each other.", "node_slug": "dot_cross_products", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/vectors_and_spaces/dot_cross_products", "extended_slug": "math/linear-algebra/vectors_and_spaces/dot_cross_products", "kind": "Topic", "slug": "dot_cross_products"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/vectors_and_spaces/matrices_elimination/", "id": "matrices_elimination", "hide": false, "title": "Matrices for solving systems by elimination", "child_data": [{"kind": "Video", "id": "25255"}, {"kind": "Video", "id": "25257"}, {"kind": "Video", "id": "25259"}], "children": [{"path": "khan/math/linear-algebra/vectors_and_spaces/matrices_elimination/matrices-reduced-row-echelon-form-1/", "id": "L0CmbneYETs", "title": "Matrices: Reduced row echelon form 1", "kind": "Video", "description": "Solving a system of linear equations by putting an augmented matrix into reduced row echelon form", "slug": "matrices-reduced-row-echelon-form-1"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/matrices_elimination/matrices-reduced-row-echelon-form-2/", "id": "lP1DGtZ8Wys", "title": "Matrices: Reduced row echelon form 2", "kind": "Video", "description": "Another example of solving a system of linear equations by putting an augmented matrix into reduced row echelon form", "slug": "matrices-reduced-row-echelon-form-2"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/matrices_elimination/matrices-reduced-row-echelon-form-3/", "id": "JVDrlTdzxiI", "title": "Matrices: Reduced row echelon form 3", "kind": "Video", "description": "And another example of solving a system of linear equations by putting an augmented matrix into reduced row echelon form", "slug": "matrices-reduced-row-echelon-form-3"}], "in_knowledge_map": false, "description": "This tutorial is a bit of an excursion back to you Algebra II days when you first solved systems of equations (and possibly used matrices to do so). In this tutorial, we did a bit deeper than you may have then, with emphasis on valid row operations and getting a matrix into reduced row echelon form.", "node_slug": "matrices_elimination", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/vectors_and_spaces/matrices_elimination", "extended_slug": "math/linear-algebra/vectors_and_spaces/matrices_elimination", "kind": "Topic", "slug": "matrices_elimination"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/", "id": "null_column_space", "hide": false, "title": "Null space and column space", "child_data": [{"kind": "Video", "id": "25261"}, {"kind": "Video", "id": "25263"}, {"kind": "Video", "id": "25265"}, {"kind": "Video", "id": "25267"}, {"kind": "Video", "id": "25269"}, {"kind": "Video", "id": "25271"}, {"kind": "Video", "id": "25273"}, {"kind": "Video", "id": "25275"}, {"kind": "Video", "id": "25277"}, {"kind": "Video", "id": "25279"}, {"kind": "Video", "id": "25281"}, {"kind": "Video", "id": "25283"}], "children": [{"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/matrix-vector-products/", "id": "7Mo4S2wyMg4", "title": "Matrix vector products", "kind": "Video", "description": "Defining and understanding what it means to take the product of a matrix and a vector", "slug": "matrix-vector-products"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/introduction-to-the-null-space-of-a-matrix/", "id": "jCwRV1QL_Xs", "title": "Introduction to the null space of a matrix", "kind": "Video", "description": "Showing that the Null Space of a Matrix is a valid Subspace", "slug": "introduction-to-the-null-space-of-a-matrix"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/null-space-2-calculating-the-null-space-of-a-matrix/", "id": "qvyboGryeA8", "title": "Null space 2: Calculating the null space of a matrix", "kind": "Video", "description": "Calculating the null space of a matrix", "slug": "null-space-2-calculating-the-null-space-of-a-matrix"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/null-space-3-relation-to-linear-independence/", "id": "vFctYRhK2M0", "title": "Null space 3: Relation to linear independence", "kind": "Video", "description": "Understanding how the null space of a matrix relates to the linear independence of its column vectors", "slug": "null-space-3-relation-to-linear-independence"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/column-space-of-a-matrix/", "id": "st6D5OdFV9M", "title": "Column space of a matrix", "kind": "Video", "description": "Introduction to the column space of a matrix", "slug": "column-space-of-a-matrix"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/null-space-and-column-space-basis/", "id": "_uTAdf_AsfQ", "title": "Null space and column space basis", "kind": "Video", "description": "Figuring out the null space and a basis of a column space for a matrix", "slug": "null-space-and-column-space-basis"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/visualizing-a-column-space-as-a-plane-in-r3/", "id": "EGNlXtjYABw", "title": "Visualizing a column space as a plane in R3", "kind": "Video", "description": "Determining the planar equation for a column space in R3", "slug": "visualizing-a-column-space-as-a-plane-in-r3"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/proof-any-subspace-basis-has-same-number-of-elements/", "id": "Zn2K8UIT8r4", "title": "Proof: Any subspace basis has same number of elements", "kind": "Video", "description": "Proof: Any subspace basis has same number of elements", "slug": "proof-any-subspace-basis-has-same-number-of-elements"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/dimension-of-the-null-space-or-nullity/", "id": "abYAUqs_n6I", "title": "Dimension of the null space or nullity", "kind": "Video", "description": "Dimension of the Null Space or Nullity", "slug": "dimension-of-the-null-space-or-nullity"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/dimension-of-the-column-space-or-rank/", "id": "JUgrBkPteTg", "title": "Dimension of the column space or rank", "kind": "Video", "description": "Dimension of the Column Space or Rank", "slug": "dimension-of-the-column-space-or-rank"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/showing-relation-between-basis-cols-and-pivot-cols/", "id": "BfVjTOjvI30", "title": "Showing relation between basis cols and pivot cols", "kind": "Video", "description": "Showing that linear independence of pivot columns implies linear independence of the corresponding columns in the original equation", "slug": "showing-relation-between-basis-cols-and-pivot-cols"}, {"path": "khan/math/linear-algebra/vectors_and_spaces/null_column_space/showing-that-the-candidate-basis-does-span-c-a/", "id": "CkQOCnLWPUA", "title": "Showing that the candidate basis does span C(A)", "kind": "Video", "description": "Showing that just the columns of A associated with the pivot columns of rref(A) do indeed span C(A).", "slug": "showing-that-the-candidate-basis-does-span-c-a"}], "in_knowledge_map": false, "description": "We will define matrix-vector multiplication and think about the set of vectors that satisfy Ax=0 for a given matrix A (this is the null space of A). We then proceed to think about the linear combinations of the columns of a matrix (column space). Both of these ideas help us think the possible solutions to the Matrix-vector equation Ax=b.", "node_slug": "null_column_space", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/vectors_and_spaces/null_column_space", "extended_slug": "math/linear-algebra/vectors_and_spaces/null_column_space", "kind": "Topic", "slug": "null_column_space"}], "in_knowledge_map": false, "description": "Let's get our feet wet by thinking in terms of vectors and spaces.", "node_slug": "vectors_and_spaces", "render_type": "Topic", "topic_page_url": "/math/linear-algebra/vectors_and_spaces", "extended_slug": "math/linear-algebra/vectors_and_spaces", "kind": "Topic", "slug": "vectors_and_spaces"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/linear-algebra/matrix_transformations/", "id": "matrix_transformations", "hide": false, "title": "Matrix transformations", "child_data": [{"kind": "Topic", "id": "xc9d8c505"}, {"kind": "Topic", "id": "x89bde35b"}, {"kind": "Topic", "id": "x28b69859"}, {"kind": "Topic", "id": "xbbb5e349"}, {"kind": "Topic", "id": "x87f9bf1b"}, {"kind": "Topic", "id": "x2de3e796"}, {"kind": "Topic", "id": "x7bf0f42f"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/", "id": "linear_transformations", "hide": false, "title": "Functions and linear transformations", "child_data": [{"kind": "Video", "id": "25285"}, {"kind": "Video", "id": "25287"}, {"kind": "Video", "id": "25289"}, {"kind": "Video", "id": "25291"}, {"kind": "Video", "id": "25293"}, {"kind": "Video", "id": "25295"}, {"kind": "Video", "id": "25297"}, {"kind": "Video", "id": "25299"}, {"kind": "Video", "id": "25301"}, {"kind": "Video", "id": "25303"}, {"kind": "Video", "id": "25305"}], "children": [{"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/a-more-formal-understanding-of-functions/", "id": "BQMyeQOLvpg", "title": "A more formal understanding of functions", "kind": "Video", "description": "A more formal understanding of functions", "slug": "a-more-formal-understanding-of-functions"}, {"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/vector-transformations/", "id": "gAbadNuQEjI", "title": "Vector transformations", "kind": "Video", "description": "Introduction to the notion of vector transformations", "slug": "vector-transformations"}, {"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/linear-transformations/", "id": "4PCktDZJH8E", "title": "Linear transformations", "kind": "Video", "description": "Introduction to linear transformations", "slug": "linear-transformations"}, {"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/matrix-vector-products-as-linear-transformations/", "id": "ondmopWLiEg", "title": "Matrix vector products as linear transformations", "kind": "Video", "description": "Matrix Vector Products as Linear Transformations", "slug": "matrix-vector-products-as-linear-transformations"}, {"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/linear-transformations-as-matrix-vector-products/", "id": "PErhLkQcpZ8", "title": "Linear transformations as matrix vector products", "kind": "Video", "description": "Showing how ANY linear transformation can be represented as a matrix vector product", "slug": "linear-transformations-as-matrix-vector-products"}, {"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/image-of-a-subset-under-a-transformation/", "id": "MIAmN5kgp3k", "title": "Image of a subset under a transformation", "kind": "Video", "description": "Exploring what happens to a subset of the domain under a transformation", "slug": "image-of-a-subset-under-a-transformation"}, {"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/im-t-image-of-a-transformation/", "id": "hZ827mfh1Jo", "title": "im(T): Image of a transformation", "kind": "Video", "description": "Showing that the image of a subspace under a transformation is also a subspace. Definition of the image of a Transformation.", "slug": "im-t-image-of-a-transformation"}, {"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/preimage-of-a-set/", "id": "zVsGtU8lIWs", "title": "Preimage of a set", "kind": "Video", "description": "Definition of preimage of a set", "slug": "preimage-of-a-set"}, {"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/preimage-and-kernel-example/", "id": "6yrPU8rYOhs", "title": "Preimage and kernel example", "kind": "Video", "description": "Example involving the preimage of a set under a transformation. Definition of kernel of a transformation.", "slug": "preimage-and-kernel-example"}, {"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/sums-and-scalar-multiples-of-linear-transformations/", "id": "wHuY97vss18", "title": "Sums and scalar multiples of linear transformations", "kind": "Video", "description": "Sums and Scalar Multiples of Linear Transformations. Definitions of matrix addition and scalar multiplication.", "slug": "sums-and-scalar-multiples-of-linear-transformations"}, {"path": "khan/math/linear-algebra/matrix_transformations/linear_transformations/more-on-matrix-addition-and-scalar-multiplication/", "id": "Z19-ObbmHJE", "title": "More on matrix addition and scalar multiplication", "kind": "Video", "description": "More on Matrix Addition and Scalar Multiplication", "slug": "more-on-matrix-addition-and-scalar-multiplication"}], "in_knowledge_map": false, "description": "People have been telling you forever that linear algebra and matrices are useful for modeling, simulations and computer graphics, but it has been a little non-obvious. This tutorial will start to draw the lines by re-introducing you functions (a bit more rigor than you may remember from high school) and linear functions/transformations in particular.", "node_slug": "linear_transformations", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/matrix_transformations/linear_transformations", "extended_slug": "math/linear-algebra/matrix_transformations/linear_transformations", "kind": "Topic", "slug": "linear_transformations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/", "id": "lin_trans_examples", "hide": false, "title": "Linear transformation examples", "child_data": [{"kind": "Video", "id": "25307"}, {"kind": "Video", "id": "25309"}, {"kind": "Video", "id": "25311"}, {"kind": "Video", "id": "25313"}, {"kind": "Video", "id": "25315"}, {"kind": "Video", "id": "25317"}], "children": [{"path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/linear-transformation-examples-scaling-and-reflections/", "id": "qkfODKmZ-x4", "title": "Linear transformation examples: Scaling and reflections", "kind": "Video", "description": "Creating scaling and reflection transformation matrices (which are diagonal)", "slug": "linear-transformation-examples-scaling-and-reflections"}, {"path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/linear-transformation-examples-rotations-in-r2/", "id": "lPWfIq5DzqI", "title": "Linear transformation examples: Rotations in R2", "kind": "Video", "description": "Linear Transformation Examples: Rotations in R2", "slug": "linear-transformation-examples-rotations-in-r2"}, {"path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/rotation-in-r3-around-the-x-axis/", "id": "gkyuLPzfDV0", "title": "Rotation in R3 around the x-axis", "kind": "Video", "description": "Construction a rotation transformation in R3", "slug": "rotation-in-r3-around-the-x-axis"}, {"path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/unit-vectors/", "id": "lQn7fksaDq0", "title": "Unit vectors", "kind": "Video", "description": "What unit vectors are and how to construct them", "slug": "unit-vectors"}, {"path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/introduction-to-projections/", "id": "27vT-NWuw0M", "title": "Introduction to projections", "kind": "Video", "description": "Determining the projection of a vector on s line", "slug": "introduction-to-projections"}, {"path": "khan/math/linear-algebra/matrix_transformations/lin_trans_examples/expressing-a-projection-on-to-a-line-as-a-matrix-vector-prod/", "id": "JK-8XNIoAkI", "title": "Expressing a projection on to a line as a matrix vector prod", "kind": "Video", "description": "Expressing a Projection on to a line as a Matrix Vector prod", "slug": "expressing-a-projection-on-to-a-line-as-a-matrix-vector-prod"}], "in_knowledge_map": false, "description": "In this tutorial, we do several examples of actually constructing transformation matrices. Very useful if you've got some actual transforming to do (especially scaling, rotating and projecting) ;)", "node_slug": "lin_trans_examples", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/matrix_transformations/lin_trans_examples", "extended_slug": "math/linear-algebra/matrix_transformations/lin_trans_examples", "kind": "Topic", "slug": "lin_trans_examples"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/matrix_transformations/composition_of_transformations/", "id": "composition_of_transformations", "hide": false, "title": "Transformations and matrix multiplication", "child_data": [{"kind": "Video", "id": "25319"}, {"kind": "Video", "id": "25321"}, {"kind": "Video", "id": "25323"}, {"kind": "Video", "id": "25325"}, {"kind": "Video", "id": "25327"}], "children": [{"path": "khan/math/linear-algebra/matrix_transformations/composition_of_transformations/compositions-of-linear-transformations-1/", "id": "f_DTiXZpb8M", "title": "Compositions of linear transformations 1", "kind": "Video", "description": "Introduction to compositions of Linear Transformations", "slug": "compositions-of-linear-transformations-1"}, {"path": "khan/math/linear-algebra/matrix_transformations/composition_of_transformations/compositions-of-linear-transformations-2/", "id": "BuqcKpe5ZQs", "title": "Compositions of linear transformations 2", "kind": "Video", "description": "Providing the motivation for definition of matrix products", "slug": "compositions-of-linear-transformations-2"}, {"path": "khan/math/linear-algebra/matrix_transformations/composition_of_transformations/linear-algebra-matrix-product-examples/", "id": "x1z0hOyjapU", "title": "Matrix product examples", "kind": "Video", "description": "Example of taking the product of two matrices", "slug": "linear-algebra-matrix-product-examples"}, {"path": "khan/math/linear-algebra/matrix_transformations/composition_of_transformations/matrix-product-associativity/", "id": "Hhc96U_HvQE", "title": "Matrix product associativity", "kind": "Video", "description": "Showing that matrix products are associative", "slug": "matrix-product-associativity"}, {"path": "khan/math/linear-algebra/matrix_transformations/composition_of_transformations/distributive-property-of-matrix-products/", "id": "oMWTMj78cwc", "title": "Distributive property of matrix products", "kind": "Video", "description": "Showing that matrix products exhibit the distributive property", "slug": "distributive-property-of-matrix-products"}], "in_knowledge_map": false, "description": "You probably remember how to multiply matrices from high school, but didn't know why or what it represented. This tutorial will address this. You'll see that multiplying two matrices can be view as the composition of linear transformations.", "node_slug": "composition_of_transformations", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/matrix_transformations/composition_of_transformations", "extended_slug": "math/linear-algebra/matrix_transformations/composition_of_transformations", "kind": "Topic", "slug": "composition_of_transformations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/", "id": "inverse_transformations", "hide": false, "title": "Inverse functions and transformations", "child_data": [{"kind": "Video", "id": "25329"}, {"kind": "Video", "id": "25331"}, {"kind": "Video", "id": "25333"}, {"kind": "Video", "id": "25335"}, {"kind": "Video", "id": "25337"}, {"kind": "Video", "id": "25339"}, {"kind": "Video", "id": "25341"}, {"kind": "Video", "id": "25343"}, {"kind": "Video", "id": "25345"}], "children": [{"path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/linear-algebra-introduction-to-the-inverse-of-a-function/", "id": "-eAzhBZgq28", "title": "Introduction to the inverse of a function", "kind": "Video", "description": "Introduction to the inverse of a function", "slug": "linear-algebra-introduction-to-the-inverse-of-a-function"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/proof-invertibility-implies-a-unique-solution-to-f-x-y/", "id": "7GEUgRcnfVE", "title": "Proof: Invertibility implies a unique solution to f(x)=y", "kind": "Video", "description": "Proof: Invertibility implies a unique solution to f(x)=y for all y in co-domain of f.", "slug": "proof-invertibility-implies-a-unique-solution-to-f-x-y"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/surjective-onto-and-injective-one-to-one-functions/", "id": "xKNX8BUWR0g", "title": "Surjective (onto) and injective (one-to-one) functions", "kind": "Video", "description": "Introduction to surjective and injective functions", "slug": "surjective-onto-and-injective-one-to-one-functions"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/relating-invertibility-to-being-onto-and-one-to-one/", "id": "QIU1daMN8fw", "title": "Relating invertibility to being onto and one-to-one", "kind": "Video", "description": "Relating invertibility to being onto (surjective) and one-to-one (injective)", "slug": "relating-invertibility-to-being-onto-and-one-to-one"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/determining-whether-a-transformation-is-onto/", "id": "eR8vEdJTvd0", "title": "Determining whether a transformation is onto", "kind": "Video", "description": "Determining whether a transformation is onto", "slug": "determining-whether-a-transformation-is-onto"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/linear-algebra-exploring-the-solution-set-of-ax-b/", "id": "1PsNIzUJPkc", "title": "Exploring the solution set of Ax = b", "kind": "Video", "description": "Exploring the solution set of Ax=b (non homogeneous equations)", "slug": "linear-algebra-exploring-the-solution-set-of-ax-b"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/linear-algebra-matrix-condition-for-one-to-one-trans/", "id": "M3FuL9qKTBs", "title": "Matrix condition for one-to-one trans", "kind": "Video", "description": "Showing that the rank of the of an mxn transformation matrix has to be an for the transformation to be one-to-one (injective)", "slug": "linear-algebra-matrix-condition-for-one-to-one-trans"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/linear-algebra-simplifying-conditions-for-invertibility/", "id": "Yz2OosyMTmY", "title": "Simplifying conditions for invertibility", "kind": "Video", "description": "Showing that a transformation is invertible if and only if rref(A) is equal to the identity matrix", "slug": "linear-algebra-simplifying-conditions-for-invertibility"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_transformations/linear-algebra-showing-that-inverses-are-linear/", "id": "mr9Tow8hpCg", "title": "Showing that inverses are linear", "kind": "Video", "description": "Showing that inverse transformations are also linear", "slug": "linear-algebra-showing-that-inverses-are-linear"}], "in_knowledge_map": false, "description": "You can use a transformation/function to map from one set to another, but can you invert it? In other words, is there a function/transformation that given the output of the original mapping, can output the original input (this is much clearer with diagrams). \n\nThis tutorial addresses this question in a linear algebra context. Since matrices can represent linear transformations, we're going to spend a lot of time thinking about matrices that represent the inverse transformation.", "node_slug": "inverse_transformations", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/matrix_transformations/inverse_transformations", "extended_slug": "math/linear-algebra/matrix_transformations/inverse_transformations", "kind": "Topic", "slug": "inverse_transformations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/", "id": "inverse_of_matrices", "hide": false, "title": "Finding inverses and determinants", "child_data": [{"kind": "Video", "id": "25347"}, {"kind": "Video", "id": "25349"}, {"kind": "Video", "id": "25351"}, {"kind": "Video", "id": "25353"}, {"kind": "Video", "id": "25355"}, {"kind": "Video", "id": "25357"}, {"kind": "Video", "id": "25359"}], "children": [{"path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-deriving-a-method-for-determining-inverses/", "id": "6DpzCKJBsz0", "title": "Deriving a method for determining inverses", "kind": "Video", "description": "Determining a method for constructing inverse transformation matrices", "slug": "linear-algebra-deriving-a-method-for-determining-inverses"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-example-of-finding-matrix-inverse/", "id": "r9aTLTN16V4", "title": "Example of finding matrix inverse", "kind": "Video", "description": "Example of calculating the inverse of a matrix", "slug": "linear-algebra-example-of-finding-matrix-inverse"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-formula-for-2x2-inverse/", "id": "eEUK_ThrHuQ", "title": "Formula for 2x2 inverse", "kind": "Video", "description": "Figuring out the formula for a 2x2 matrix. Defining the determinant.", "slug": "linear-algebra-formula-for-2x2-inverse"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-3x3-determinant/", "id": "0c7dt2SQfLw", "title": "3 x 3 determinant", "kind": "Video", "description": "Determinants: Finding the determinant of a 3x3 matrix", "slug": "linear-algebra-3x3-determinant"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-nxn-determinant/", "id": "H9BWRYJNIv4", "title": "n x n determinant", "kind": "Video", "description": "Defining the determinant for nxn matrices. An exampled of a 4x4 determinant.", "slug": "linear-algebra-nxn-determinant"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-determinants-along-other-rows-cols/", "id": "nu87kfmwNfU", "title": "Determinants along other rows/cols", "kind": "Video", "description": "Finding the determinant by going along other rows or columns", "slug": "linear-algebra-determinants-along-other-rows-cols"}, {"path": "khan/math/linear-algebra/matrix_transformations/inverse_of_matrices/linear-algebra-rule-of-sarrus-of-determinants/", "id": "4xFIi0JF2AM", "title": "Rule of Sarrus of determinants", "kind": "Video", "description": "A alternative \"short cut\" for calculating 3x3 determinants (Rule of Sarrus)", "slug": "linear-algebra-rule-of-sarrus-of-determinants"}], "in_knowledge_map": false, "description": "We've talked a lot about inverse transformations abstractly in the last tutorial. Now, we're ready to actually compute inverses. We start from \"documenting\" the row operations to get a matrix into reduced row echelon form and use this to come up with the formula for the inverse of a 2x2 matrix. After this we define a determinant for 2x2, 3x3 and nxn matrices.", "node_slug": "inverse_of_matrices", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/matrix_transformations/inverse_of_matrices", "extended_slug": "math/linear-algebra/matrix_transformations/inverse_of_matrices", "kind": "Topic", "slug": "inverse_of_matrices"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/", "id": "determinant_depth", "hide": false, "title": "More determinant depth", "child_data": [{"kind": "Video", "id": "25361"}, {"kind": "Video", "id": "25363"}, {"kind": "Video", "id": "25365"}, {"kind": "Video", "id": "25367"}, {"kind": "Video", "id": "25369"}, {"kind": "Video", "id": "25371"}, {"kind": "Video", "id": "25373"}, {"kind": "Video", "id": "25375"}, {"kind": "Video", "id": "25377"}], "children": [{"path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-determinant-when-row-multiplied-by-scalar/", "id": "32rdijPB-rA", "title": "Determinant when row multiplied by scalar", "kind": "Video", "description": "The determinant when a row is multiplied by a scalar", "slug": "linear-algebra-determinant-when-row-multiplied-by-scalar"}, {"path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-correction-scalar-muliplication-of-row/", "id": "WY6QG0mZ7uQ", "title": "(correction) scalar multiplication of row", "kind": "Video", "description": "Correction of last video showing that the determinant when one row is multiplied by a scalar is equal to the scalar times the determinant", "slug": "linear-algebra-correction-scalar-muliplication-of-row"}, {"path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-determinant-when-row-is-added/", "id": "VrB3LaSD_uo", "title": "Determinant when row is added", "kind": "Video", "description": "The determinant when one matrix has a row that is the sum of the rows of other matrices (and every other term is identical in the 3 matrices)", "slug": "linear-algebra-determinant-when-row-is-added"}, {"path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-duplicate-row-determinant/", "id": "gYv8sttBIqs", "title": "Duplicate row determinant", "kind": "Video", "description": "Determinant of a matrix with duplicate rows", "slug": "linear-algebra-duplicate-row-determinant"}, {"path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-determinant-after-row-operations/", "id": "kpG7xySkivg", "title": "Determinant after row operations", "kind": "Video", "description": "What happens to the determinant when we perform a row operation", "slug": "linear-algebra-determinant-after-row-operations"}, {"path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-upper-triangular-determinant/", "id": "VX7K8iqoiRc", "title": "Upper triangular determinant", "kind": "Video", "description": "The determinant of an upper triangular matrix", "slug": "linear-algebra-upper-triangular-determinant"}, {"path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-simpler-4x4-determinant/", "id": "QV0jsTiobU4", "title": "Simpler 4x4 determinant", "kind": "Video", "description": "Calculating a 4x4 determinant by putting in in upper triangular form first.", "slug": "linear-algebra-simpler-4x4-determinant"}, {"path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-determinant-and-area-of-a-parallelogram/", "id": "n-S63_goDFg", "title": "Determinant and area of a parallelogram", "kind": "Video", "description": "Realizing that the determinant of a 2x2 matrix is equal to the area of the parallelogram defined by the column vectors of the matrix", "slug": "linear-algebra-determinant-and-area-of-a-parallelogram"}, {"path": "khan/math/linear-algebra/matrix_transformations/determinant_depth/linear-algebra-determinant-as-scaling-factor/", "id": "g3MqSdO5Ubc", "title": "Determinant as scaling factor", "kind": "Video", "description": "Viewing the determinant of the transformation matrix as a scaling factor of regions", "slug": "linear-algebra-determinant-as-scaling-factor"}], "in_knowledge_map": false, "description": "In the last tutorial on matrix inverses, we first defined what a determinant is and gave several examples of computing them. In this tutorial we go deeper. We will explore what happens to the determinant under several circumstances and conceptualize it in several ways.", "node_slug": "determinant_depth", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/matrix_transformations/determinant_depth", "extended_slug": "math/linear-algebra/matrix_transformations/determinant_depth", "kind": "Topic", "slug": "determinant_depth"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/", "id": "matrix_transpose", "hide": false, "title": "Transpose of a matrix", "child_data": [{"kind": "Video", "id": "25379"}, {"kind": "Video", "id": "25381"}, {"kind": "Video", "id": "178920409"}, {"kind": "Video", "id": "25383"}, {"kind": "Video", "id": "25385"}, {"kind": "Video", "id": "25387"}, {"kind": "Video", "id": "25389"}, {"kind": "Video", "id": "25393"}, {"kind": "Video", "id": "25407"}], "children": [{"path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/linear-algebra-transpose-of-a-matrix/", "id": "2t0003_sxtU", "title": "Transpose of a matrix", "kind": "Video", "description": "Transpose of a matrix", "slug": "linear-algebra-transpose-of-a-matrix"}, {"path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/linear-algebra-determinant-of-transpose/", "id": "x-GV2v0dRNE", "title": "Determinant of transpose", "kind": "Video", "description": "Proof by induction that transposing a matrix does not change its determinant", "slug": "linear-algebra-determinant-of-transpose"}, {"path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/linear-algebra-transpose-of-a-matrix-product/", "id": "UdHgWK13x5I", "title": "Transpose of a matrix product", "kind": "Video", "description": "Taking the transpose of the product of two matrices", "slug": "linear-algebra-transpose-of-a-matrix-product"}, {"path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/linear-algebra-transposes-of-sums-and-inverses/", "id": "Br_8t58mdeI", "title": "Transposes of sums and inverses", "kind": "Video", "description": "Transposes of sums and inverses", "slug": "linear-algebra-transposes-of-sums-and-inverses"}, {"path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/linear-algebra-transpose-of-a-vector/", "id": "lSoaMCNKfAg", "title": "Transpose of a vector", "kind": "Video", "description": "Transpose of a column vector. Matrix-matrix products using vectors", "slug": "linear-algebra-transpose-of-a-vector"}, {"path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/linear-algebra-rowspace-and-left-nullspace/", "id": "qBfc57x_RSg", "title": "Rowspace and left nullspace", "kind": "Video", "description": "Rowspace and Left Nullspace", "slug": "linear-algebra-rowspace-and-left-nullspace"}, {"path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/lin-alg-visualizations-of-left-nullspace-and-rowspace/", "id": "GW8ZPjGlk24", "title": "Visualizations of left nullspace and rowspace", "kind": "Video", "description": "Relationship between left nullspace, rowspace, column space and nullspace.", "slug": "lin-alg-visualizations-of-left-nullspace-and-rowspace"}, {"path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/linear-algebra-rank-a-rank-transpose-of-a/", "id": "tqqVOWm9YsU", "title": "rank(a) = rank(transpose of a)", "kind": "Video", "description": "Rank(A) = Rank(transpose of A)", "slug": "linear-algebra-rank-a-rank-transpose-of-a"}, {"path": "khan/math/linear-algebra/matrix_transformations/matrix_transpose/lin-alg-showing-that-a-transpose-x-a-is-invertible/", "id": "ESSMQH6Y5OA", "title": "Showing that A-transpose x A is invertible", "kind": "Video", "description": "Showing that (transpose of A)(A) is invertible if A has linearly independent columns", "slug": "lin-alg-showing-that-a-transpose-x-a-is-invertible"}], "in_knowledge_map": false, "description": "We now explore what happens when you switch the rows and columns of a matrix!", "node_slug": "matrix_transpose", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/matrix_transformations/matrix_transpose", "extended_slug": "math/linear-algebra/matrix_transformations/matrix_transpose", "kind": "Topic", "slug": "matrix_transpose"}], "in_knowledge_map": false, "description": "Understanding how we can map one set of vectors to another set. Matrices used to define linear transformations.", "node_slug": "matrix_transformations", "render_type": "Topic", "topic_page_url": "/math/linear-algebra/matrix_transformations", "extended_slug": "math/linear-algebra/matrix_transformations", "kind": "Topic", "slug": "matrix_transformations"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/linear-algebra/alternate_bases/", "id": "alternate_bases", "hide": false, "title": "Alternate coordinate systems (bases)", "child_data": [{"kind": "Topic", "id": "x3826be61"}, {"kind": "Topic", "id": "xd6d11862"}, {"kind": "Topic", "id": "x476be17b"}, {"kind": "Topic", "id": "xf34f42a2"}, {"kind": "Topic", "id": "xbbab9c7d"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/", "id": "othogonal_complements", "hide": false, "title": "Orthogonal complements", "child_data": [{"kind": "Video", "id": "25391"}, {"kind": "Video", "id": "25395"}, {"kind": "Video", "id": "25397"}, {"kind": "Video", "id": "25399"}, {"kind": "Video", "id": "25401"}, {"kind": "Video", "id": "25403"}, {"kind": "Video", "id": "25405"}], "children": [{"path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/linear-algebra-orthogonal-complements/", "id": "QOTjdgmNqlg", "title": "Orthogonal complements", "kind": "Video", "description": "Orthogonal Complements as subspaces.", "slug": "linear-algebra-orthogonal-complements"}, {"path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/linear-algebra-dim-v-dim-orthogonal-complement-of-v-n/", "id": "pGhBfkBqok0", "title": "dim(v) + dim(orthogonal complement of v) = n", "kind": "Video", "description": "Showing that if V is a subspace of Rn, then dim(V) + dim(V's orthogonal complement) = n", "slug": "linear-algebra-dim-v-dim-orthogonal-complement-of-v-n"}, {"path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/lin-alg-representing-vectors-in-rn-using-subspace-members/", "id": "M6lFqkqvUgo", "title": "Representing vectors in rn using subspace members", "kind": "Video", "description": "Showing that any member of Rn can be represented as a unique sum of a vector in subspace V and a vector in the orthogonal complement of V.", "slug": "lin-alg-representing-vectors-in-rn-using-subspace-members"}, {"path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/lin-alg-orthogonal-complement-of-the-orthogonal-complement/", "id": "zlI8mx8Hc8o", "title": "Orthogonal complement of the orthogonal complement", "kind": "Video", "description": "Finding that the orthogonal complement of the orthogonal complement of V is V", "slug": "lin-alg-orthogonal-complement-of-the-orthogonal-complement"}, {"path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/lin-alg-orthogonal-complement-of-the-nullspace/", "id": "LE_aQAur7nI", "title": "Orthogonal complement of the nullspace", "kind": "Video", "description": "The orthogonal complement of the nullspace and left nullspace.", "slug": "lin-alg-orthogonal-complement-of-the-nullspace"}, {"path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/lin-alg-unique-rowspace-solution-to-ax-b/", "id": "czIYvs9zj2g", "title": "Unique rowspace solution to Ax = b", "kind": "Video", "description": "Showing that, for any b that is in the column space of A, there is a unique member of the row space that is the \"smallest\" solution to Ax=b", "slug": "lin-alg-unique-rowspace-solution-to-ax-b"}, {"path": "khan/math/linear-algebra/alternate_bases/othogonal_complements/linear-alg-rowspace-solution-to-ax-b-example/", "id": "qdf2CuMGdKs", "title": "Rowspace solution to Ax = b example", "kind": "Video", "description": "Visualizing the rowspace solution to Ax=b", "slug": "linear-alg-rowspace-solution-to-ax-b-example"}], "in_knowledge_map": false, "description": "We will know explore the set of vectors that is orthogonal to every vector in a second set (this is the second set's orthogonal complement).", "node_slug": "othogonal_complements", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/alternate_bases/othogonal_complements", "extended_slug": "math/linear-algebra/alternate_bases/othogonal_complements", "kind": "Topic", "slug": "othogonal_complements"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/", "id": "orthogonal_projections", "hide": false, "title": "Orthogonal projections", "child_data": [{"kind": "Video", "id": "25409"}, {"kind": "Video", "id": "25411"}, {"kind": "Video", "id": "25413"}, {"kind": "Video", "id": "25415"}, {"kind": "Video", "id": "25417"}, {"kind": "Video", "id": "25419"}, {"kind": "Video", "id": "25421"}, {"kind": "Video", "id": "25423"}, {"kind": "Video", "id": "25425"}], "children": [{"path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-algebra-projections-onto-subspaces/", "id": "5B8XluiqdHM", "title": "Projections onto subspaces", "kind": "Video", "description": "Projections onto subspaces", "slug": "linear-algebra-projections-onto-subspaces"}, {"path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-alg-visualizing-a-projection-onto-a-plane/", "id": "uWbZlJURkfA", "title": "Visualizing a projection onto a plane", "kind": "Video", "description": "Visualizing a projection onto a plane. Showing that the old and new definitions of projections aren't that different.", "slug": "linear-alg-visualizing-a-projection-onto-a-plane"}, {"path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/lin-alg-a-projection-onto-a-subspace-is-a-linear-transforma/", "id": "cTyNpXB92bQ", "title": "A projection onto a subspace is a linear transformation", "kind": "Video", "description": "Showing that a projection onto a subspace is a linear transformation", "slug": "lin-alg-a-projection-onto-a-subspace-is-a-linear-transforma"}, {"path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-algebra-subspace-projection-matrix-example/", "id": "QTcSBB3uVP0", "title": "Subspace projection matrix example", "kind": "Video", "description": "Example of a transformation matrix for a projection onto a subspace", "slug": "linear-algebra-subspace-projection-matrix-example"}, {"path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/lin-alg-another-example-of-a-projection-matrix/", "id": "XhCSHu6dHb8", "title": "Another example of a projection matrix", "kind": "Video", "description": "Figuring out the transformation matrix for a projection onto a subspace by figuring out the matrix for the projection onto the subspace's orthogonal complement first", "slug": "lin-alg-another-example-of-a-projection-matrix"}, {"path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-alg-projection-is-closest-vector-in-subspace/", "id": "b269qpILOpk", "title": "Projection is closest vector in subspace", "kind": "Video", "description": "Showing that the projection of x onto a subspace is the closest vector in the subspace to x", "slug": "linear-alg-projection-is-closest-vector-in-subspace"}, {"path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-algebra-least-squares-approximation/", "id": "MC7l96tW8V8", "title": "Least squares approximation", "kind": "Video", "description": "The least squares approximation for otherwise unsolvable equations", "slug": "linear-algebra-least-squares-approximation"}, {"path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-algebra-least-squares-examples/", "id": "8mAZYv5wIcE", "title": "Least squares examples", "kind": "Video", "description": "An example using the least squares solution to an unsolvable system", "slug": "linear-algebra-least-squares-examples"}, {"path": "khan/math/linear-algebra/alternate_bases/orthogonal_projections/linear-algebra-another-least-squares-example/", "id": "QkepM8Vv3kw", "title": "Another least squares example", "kind": "Video", "description": "Using least squares approximation to fit a line to points", "slug": "linear-algebra-another-least-squares-example"}], "in_knowledge_map": false, "description": "This is one of those tutorials that bring many ideas we've been building together into something applicable. Orthogonal projections (which can sometimes be conceptualized as a \"vector's shadow\" on a subspace if the light source is above it) can be used in fields varying from computer graphics and statistics!\n\nIf you're familiar with orthogonal complements, then you're ready for this tutorial!", "node_slug": "orthogonal_projections", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/alternate_bases/orthogonal_projections", "extended_slug": "math/linear-algebra/alternate_bases/orthogonal_projections", "kind": "Topic", "slug": "orthogonal_projections"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/alternate_bases/change_of_basis/", "id": "change_of_basis", "hide": false, "title": "Change of basis", "child_data": [{"kind": "Video", "id": "25427"}, {"kind": "Video", "id": "25429"}, {"kind": "Video", "id": "25431"}, {"kind": "Video", "id": "25433"}, {"kind": "Video", "id": "25435"}, {"kind": "Video", "id": "25437"}, {"kind": "Video", "id": "25439"}], "children": [{"path": "khan/math/linear-algebra/alternate_bases/change_of_basis/linear-algebra-coordinates-with-respect-to-a-basis/", "id": "uvgru6FcyxU", "title": "Coordinates with respect to a basis", "kind": "Video", "description": "Understanding alternate coordinate systems", "slug": "linear-algebra-coordinates-with-respect-to-a-basis"}, {"path": "khan/math/linear-algebra/alternate_bases/change_of_basis/linear-algebra-change-of-basis-matrix/", "id": "1j5WnqwMdCk", "title": "Change of basis matrix", "kind": "Video", "description": "Using a change of basis matrix to get us from one coordinate system to another.", "slug": "linear-algebra-change-of-basis-matrix"}, {"path": "khan/math/linear-algebra/alternate_bases/change_of_basis/lin-alg-invertible-change-of-basis-matrix/", "id": "meibWcbGqt4", "title": "Invertible change of basis matrix", "kind": "Video", "description": "Using an invertible change of basis matrix to go between different coordinate systems", "slug": "lin-alg-invertible-change-of-basis-matrix"}, {"path": "khan/math/linear-algebra/alternate_bases/change_of_basis/lin-alg-transformation-matrix-with-respect-to-a-basis/", "id": "PiuhTj0zCf4", "title": "Transformation matrix with respect to a basis", "kind": "Video", "description": "Finding the transformation matrix with respect to a non-standard basis", "slug": "lin-alg-transformation-matrix-with-respect-to-a-basis"}, {"path": "khan/math/linear-algebra/alternate_bases/change_of_basis/lin-alg-alternate-basis-tranformation-matrix-example/", "id": "lCRGNykWqFI", "title": "Alternate basis transformation matrix example", "kind": "Video", "description": "Example of finding the transformation matrix for an alternate basis", "slug": "lin-alg-alternate-basis-tranformation-matrix-example"}, {"path": "khan/math/linear-algebra/alternate_bases/change_of_basis/lin-alg-alternate-basis-tranformation-matrix-example-part-2/", "id": "EyORbCPUAd4", "title": "Alternate basis transformation matrix example part 2", "kind": "Video", "description": "Showing that the transformation matrix with respect to basis B actually works. Brief point on why someone would want to operate in a different basis to begin with.", "slug": "lin-alg-alternate-basis-tranformation-matrix-example-part-2"}, {"path": "khan/math/linear-algebra/alternate_bases/change_of_basis/lin-alg-changing-coordinate-systems-to-help-find-a-transformation-matrix/", "id": "K_na_j1Msfg", "title": "Changing coordinate systems to help find a transformation matrix", "kind": "Video", "description": "Changing our coordinate system to find the transformation matrix with respect to standard coordinates", "slug": "lin-alg-changing-coordinate-systems-to-help-find-a-transformation-matrix"}], "in_knowledge_map": false, "description": "Finding a coordinate system boring. Even worse, does it make certain transformations difficult (especially transformations that you have to do over and over and over again)? Well, we have the tool for you: change your coordinate system to one that you like more. Sound strange? Watch this tutorial and it will be less so. Have fun!", "node_slug": "change_of_basis", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/alternate_bases/change_of_basis", "extended_slug": "math/linear-algebra/alternate_bases/change_of_basis", "kind": "Topic", "slug": "change_of_basis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/", "id": "orthonormal_basis", "hide": false, "title": "Orthonormal bases and the Gram-Schmidt process", "child_data": [{"kind": "Video", "id": "25441"}, {"kind": "Video", "id": "25443"}, {"kind": "Video", "id": "25445"}, {"kind": "Video", "id": "25447"}, {"kind": "Video", "id": "25449"}, {"kind": "Video", "id": "25451"}, {"kind": "Video", "id": "25453"}, {"kind": "Video", "id": "25455"}, {"kind": "Video", "id": "25457"}], "children": [{"path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/linear-algebra-introduction-to-orthonormal-bases/", "id": "7BFx8pt2aTQ", "title": "Introduction to orthonormal bases", "kind": "Video", "description": "Looking at sets and bases that are orthonormal -- or where all the vectors have length 1 and are orthogonal to each other.", "slug": "linear-algebra-introduction-to-orthonormal-bases"}, {"path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/linear-algebra-coordinates-with-respect-to-orthonormal-bases/", "id": "SWbis2zWIvo", "title": "Coordinates with respect to orthonormal bases", "kind": "Video", "description": "Seeing that orthonormal bases make for good coordinate systems", "slug": "linear-algebra-coordinates-with-respect-to-orthonormal-bases"}, {"path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/lin-alg-projections-onto-subspaces-with-orthonormal-bases/", "id": "we829K4NOq8", "title": "Projections onto subspaces with orthonormal bases", "kind": "Video", "description": "Projections onto subspaces with orthonormal bases", "slug": "lin-alg-projections-onto-subspaces-with-orthonormal-bases"}, {"path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/lin-alg-finding-projection-onto-subspace-with-orthonormal-basis-example/", "id": "SUoqA9srY1Q", "title": "Finding projection onto subspace with orthonormal basis example", "kind": "Video", "description": "Example of finding the transformation matrix for the projection onto a subspace with an orthonormal basis", "slug": "lin-alg-finding-projection-onto-subspace-with-orthonormal-basis-example"}, {"path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/lin-alg-example-using-orthogonal-change-of-basis-matrix-to-find-transformation-matrix/", "id": "gfVY7cW7VLQ", "title": "Example using orthogonal change-of-basis matrix to find transformation matrix", "kind": "Video", "description": "Example using orthogonal change-of-basis matrix to find transformation matrix", "slug": "lin-alg-example-using-orthogonal-change-of-basis-matrix-to-find-transformation-matrix"}, {"path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/lin-alg-orthogonal-matrices-preserve-angles-and-lengths/", "id": "yDwIfYjKEeo", "title": "Orthogonal matrices preserve angles and lengths", "kind": "Video", "description": "Showing that orthogonal matrices preserve angles and lengths", "slug": "lin-alg-orthogonal-matrices-preserve-angles-and-lengths"}, {"path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/linear-algebra-the-gram-schmidt-process/", "id": "rHonltF77zI", "title": "The Gram-Schmidt process", "kind": "Video", "description": "Finding an orthonormal basis for a subspace using the Gram-Schmidt Process", "slug": "linear-algebra-the-gram-schmidt-process"}, {"path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/linear-algebra-gram-schmidt-process-example/", "id": "tu1GPtfsQ7M", "title": "Gram-Schmidt process example", "kind": "Video", "description": "Using Gram-Schmidt to find an orthonormal basis for a plane in R3", "slug": "linear-algebra-gram-schmidt-process-example"}, {"path": "khan/math/linear-algebra/alternate_bases/orthonormal_basis/linear-algebra-gram-schmidt-example-with-3-basis-vectors/", "id": "ZRRG386v6DI", "title": "Gram-Schmidt example with 3 basis vectors", "kind": "Video", "description": "Gram-Schmidt example with 3 basis vectors", "slug": "linear-algebra-gram-schmidt-example-with-3-basis-vectors"}], "in_knowledge_map": false, "description": "As we'll see in this tutorial, it is hard not to love a basis where all the vectors are orthogonal to each other and each have length 1 (hey, this sounds pretty much like some coordinate systems you've known for a long time!). We explore these orthonormal bases in some depth and also give you a great tool for creating them: the Gram-Schmidt Process (which would also be a great name for a band).", "node_slug": "orthonormal_basis", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/alternate_bases/orthonormal_basis", "extended_slug": "math/linear-algebra/alternate_bases/orthonormal_basis", "kind": "Topic", "slug": "orthonormal_basis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/linear-algebra/alternate_bases/eigen_everything/", "id": "eigen_everything", "hide": false, "title": "Eigen-everything", "child_data": [{"kind": "Video", "id": "25459"}, {"kind": "Video", "id": "25461"}, {"kind": "Video", "id": "25463"}, {"kind": "Video", "id": "25465"}, {"kind": "Video", "id": "25467"}, {"kind": "Video", "id": "25469"}, {"kind": "Video", "id": "25471"}], "children": [{"path": "khan/math/linear-algebra/alternate_bases/eigen_everything/linear-algebra-introduction-to-eigenvalues-and-eigenvectors/", "id": "PhfbEr2btGQ", "title": "Introduction to eigenvalues and eigenvectors", "kind": "Video", "description": "What eigenvectors and eigenvalues are and why they are interesting", "slug": "linear-algebra-introduction-to-eigenvalues-and-eigenvectors"}, {"path": "khan/math/linear-algebra/alternate_bases/eigen_everything/linear-algebra-proof-of-formula-for-determining-eigenvalues/", "id": "rfm0wQObxjk", "title": "Proof of formula for determining eigenvalues", "kind": "Video", "description": "Proof of formula for determining Eigenvalues", "slug": "linear-algebra-proof-of-formula-for-determining-eigenvalues"}, {"path": "khan/math/linear-algebra/alternate_bases/eigen_everything/linear-algebra-example-solving-for-the-eigenvalues-of-a-2x2-matrix/", "id": "pZ6mMVEE89g", "title": "Example solving for the eigenvalues of a 2x2 matrix", "kind": "Video", "description": "Example solving for the eigenvalues of a 2x2 matrix", "slug": "linear-algebra-example-solving-for-the-eigenvalues-of-a-2x2-matrix"}, {"path": "khan/math/linear-algebra/alternate_bases/eigen_everything/linear-algebra-finding-eigenvectors-and-eigenspaces-example/", "id": "3-xfmbdzkqc", "title": "Finding eigenvectors and eigenspaces example", "kind": "Video", "description": "Finding the eigenvectors and eigenspaces of a 2x2 matrix", "slug": "linear-algebra-finding-eigenvectors-and-eigenspaces-example"}, {"path": "khan/math/linear-algebra/alternate_bases/eigen_everything/linear-algebra-eigenvalues-of-a-3x3-matrix/", "id": "11dNghWC4HI", "title": "Eigenvalues of a 3x3 matrix", "kind": "Video", "description": "Determining the eigenvalues of a 3x3 matrix", "slug": "linear-algebra-eigenvalues-of-a-3x3-matrix"}, {"path": "khan/math/linear-algebra/alternate_bases/eigen_everything/linear-algebra-eigenvectors-and-eigenspaces-for-a-3x3-matrix/", "id": "3Md5KCCQX-0", "title": "Eigenvectors and eigenspaces for a 3x3 matrix", "kind": "Video", "description": "Eigenvectors and eigenspaces for a 3x3 matrix", "slug": "linear-algebra-eigenvectors-and-eigenspaces-for-a-3x3-matrix"}, {"path": "khan/math/linear-algebra/alternate_bases/eigen_everything/linear-algebra-showing-that-an-eigenbasis-makes-for-good-coordinate-systems/", "id": "C2PC9185gIw", "title": "Showing that an eigenbasis makes for good coordinate systems", "kind": "Video", "description": "Showing that an eigenbasis makes for good coordinate systems", "slug": "linear-algebra-showing-that-an-eigenbasis-makes-for-good-coordinate-systems"}], "in_knowledge_map": false, "description": "Eigenvectors, eigenvalues, eigenspaces! We will not stop with the \"eigens\"! Seriously though, eigen-everythings have many applications including finding \"good\" bases for a transformation (yes, \"good\" is a technical term in this context).", "node_slug": "eigen_everything", "render_type": "Tutorial", "topic_page_url": "/math/linear-algebra/alternate_bases/eigen_everything", "extended_slug": "math/linear-algebra/alternate_bases/eigen_everything", "kind": "Topic", "slug": "eigen_everything"}], "in_knowledge_map": false, "description": "We explore creating and moving between various coordinate systems.", "node_slug": "alternate_bases", "render_type": "Topic", "topic_page_url": "/math/linear-algebra/alternate_bases", "extended_slug": "math/linear-algebra/alternate_bases", "kind": "Topic", "slug": "alternate_bases"}], "in_knowledge_map": false, "description": "Have you ever wondered what the difference is between speed and velocity? Ever try to visualize in four dimensions or six or seven? Linear algebra describes things in two dimensions, but many of the concepts can be extended into three, four or more. Linear algebra implies two dimensional reasoning, however, the concepts covered in linear algebra provide the basis for multi-dimensional representations of mathematical reasoning. Matrices, vectors, vector spaces, transformations, eigenvectors/values all help us to visualize and understand multi dimensional concepts. This is an advanced course normally taken by science or engineering majors after taking at least two semesters of calculus (although calculus really isn't a prereq) so don't confuse this with regular high school algebra.", "node_slug": "linear-algebra", "render_type": "Subject", "topic_page_url": "/math/linear-algebra", "extended_slug": "math/linear-algebra", "kind": "Topic", "slug": "linear-algebra"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/recreational-math/", "id": "recreational-math", "hide": false, "title": "Recreational math", "child_data": [{"kind": "Topic", "id": "xf48ec4ac"}, {"kind": "Topic", "id": "x3eb9a450"}, {"kind": "Topic", "id": "xadc6d3a5"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/recreational-math/vi-hart/", "id": "vi-hart", "hide": false, "title": "Doodling in Math and more", "child_data": [{"kind": "Topic", "id": "x452dbed3"}, {"kind": "Topic", "id": "xc6541a95"}, {"kind": "Topic", "id": "x1b47e16c"}, {"kind": "Topic", "id": "x0fc1ab8d"}, {"kind": "Topic", "id": "xde77a66e"}, {"kind": "Topic", "id": "x98b57e0e"}, {"kind": "Topic", "id": "x27df170e"}, {"kind": "Topic", "id": "x37657e0a"}, {"kind": "Topic", "id": "x373e7082"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/vi-hart/spirals-fibonacci/", "id": "spirals-fibonacci", "hide": false, "title": "Spirals, Fibonacci and being a plant", "child_data": [{"kind": "Video", "id": "537957955"}, {"kind": "Video", "id": "537990401"}, {"kind": "Video", "id": "537974533"}, {"kind": "Video", "id": "728649651"}, {"kind": "Video", "id": "538043431"}], "children": [{"path": "khan/math/recreational-math/vi-hart/spirals-fibonacci/doodling-in-math-spirals-fibonacci-and-being-a-plant-1-of-3/", "id": "ahXIMUkSXX0", "title": "Doodling in math: Spirals, Fibonacci, and being a plant [1 of 3]", "kind": "Video", "description": "Part 2: http://youtu.be/lOIP_Z_-0Hs Part 3: http://youtu.be/14-NdQwKz9w Re: Pineapple under the Sea: http://youtu.be/gBxeju8dMho", "slug": "doodling-in-math-spirals-fibonacci-and-being-a-plant-1-of-3"}, {"path": "khan/math/recreational-math/vi-hart/spirals-fibonacci/doodling-in-math-class-spirals-fibonacci-and-being-a-plant-2-of-3/", "id": "lOIP_Z_-0Hs", "title": "Doodling in math: Spirals, Fibonacci, and being a plant [2 of 3]", "kind": "Video", "description": "Part 1: http://youtu.be/ahXIMUkSXX0Part 3: http://youtu.be/14-NdQwKz9wMore on Angle-a-trons: http://www.youtube.com/watch?v=o6W6P8JZW0oNote: Beautiful spirally non-Fibonacci pinecones are very rare! If you find one, keep it.", "slug": "doodling-in-math-class-spirals-fibonacci-and-being-a-plant-2-of-3"}, {"path": "khan/math/recreational-math/vi-hart/spirals-fibonacci/doodling-in-math-spirals-fibonacci-and-being-a-plant-part-3-of-3/", "id": "14-NdQwKz9w", "title": "Doodling in math: Spirals, Fibonacci, and being a plant [3 of 3]", "kind": "Video", "description": "Part 1: http://youtu.be/ahXIMUkSXX0 Part 2: http://youtu.be/lOIP_Z_-0Hs How to find the Lucas Angle: http://youtu.be/RRNQAaTVa_A References: Only good article I could find on the subject: http://www.sciencenews.org/view/generic/id/8479/title/Math_Trek__The_Mathematical_Lives_of_Plants Book of Numbers: http://books.google.com/books?id=0--3rcO7dMYC&pg=PA113&lpg=PA113&dq=conway+phyllotaxis&source=bl&ots=-bTLzWkMtB&sig=XnbL9nRYQoWOCbvWdZPAlVa3Co0&hl=en&sa=X&ei=2afqTui9L6OUiAKapaC7BA&ved=0CCkQ6AEwAQ#v=onepage&q&f=false Douady and Couder paper with the magnetized droplets: http://www.math.ntnu.no/~jarlet/Douady96.pdf Pretty sane page on phyllotaxis: http://www.math.smith.edu/phyllo/", "slug": "doodling-in-math-spirals-fibonacci-and-being-a-plant-part-3-of-3"}, {"path": "khan/math/recreational-math/vi-hart/spirals-fibonacci/open-letter-to-nickelodeon-re-spongebob-s-pineapple-under-the-sea/", "id": "gBxeju8dMho", "title": "Open letter to Nickelodeon, re: SpongeBob's pineapple under the sea", "kind": "Video", "description": "SpongeBob background designer's response: \"OK, I guess the jig is up... I'm tired of living a lie.\" See his full message and pineapple redesign: http://kennypittenger.blogspot.com/2012/01/called-out.html\n\nP.S. http://youtu.be/sFTwc8kHSu4\nFor more on Fibonacci and Plants: http://youtu.be/ahXIMUkSXX0\nFor more snail: http://youtu.be/xbsAUq_nvxE", "slug": "open-letter-to-nickelodeon-re-spongebob-s-pineapple-under-the-sea"}, {"path": "khan/math/recreational-math/vi-hart/spirals-fibonacci/angle-a-trons/", "id": "o6W6P8JZW0o", "title": "Angle-a-trons", "kind": "Video", "description": "This is a follow-up from Being a Plant part 2 ( http://youtu.be/lOIP_Z_-0Hs )", "slug": "angle-a-trons"}], "in_knowledge_map": false, "description": "You're feeling spirally today, and math class today is taking place in greenhouse #3...", "node_slug": "spirals-fibonacci", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/vi-hart/spirals-fibonacci", "extended_slug": "math/recreational-math/vi-hart/spirals-fibonacci", "kind": "Topic", "slug": "spirals-fibonacci"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/vi-hart/doodling-in-math/", "id": "doodling-in-math", "hide": false, "title": "Doodling in math", "child_data": [{"kind": "Video", "id": "537994428"}, {"kind": "Video", "id": "538012397"}, {"kind": "Video", "id": "538019273"}, {"kind": "Video", "id": "537953973"}, {"kind": "Video", "id": "538039386"}, {"kind": "Video", "id": "994500389"}, {"kind": "Video", "id": "538104060"}, {"kind": "Video", "id": "538034158"}, {"kind": "Video", "id": "x89e93a69"}, {"kind": "Video", "id": "x6493e13b"}, {"kind": "Video", "id": "x52364ea5"}], "children": [{"path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-infinity-elephants/", "id": "DK5Z709J2eo", "title": "Doodling in math: Infinity elephants", "kind": "Video", "description": "More videos/info: http://vihart.com/doodlingDoodling Snakes + Graphs: http://www.youtube.com/watch?v=heKK95DAKmsDoodling Stars: http://www.youtube.com/watch?v=CfJzrmS9UfYDoodling Binary Trees: http://www.youtube.com/watch?v=e4MSN6IImpIhttp://vihart.com", "slug": "doodling-in-math-class-infinity-elephants"}, {"path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-stars/", "id": "CfJzrmS9UfY", "title": "Doodling in math: Stars", "kind": "Video", "description": "More videos/info: http://vihart.com/doodlingCheck out this cool star-making applet Ruurtjan sent me: http://stars.ruurtjan.comDoodling Infinity Elephants: http://www.youtube.com/watch?v=DK5Z709J2eoDoodling Snakes + Graphs: http://www.youtube.com/watch?v=heKK95DAKmsDoodling Binary Trees: http://www.youtube.com/watch?v=e4MSN6IImpIhttp://vihart.com", "slug": "doodling-in-math-class-stars"}, {"path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-binary-trees/", "id": "e4MSN6IImpI", "title": "Doodling in math: Binary trees", "kind": "Video", "description": "Thank you to all the people I know whose math classes do not require such pastimes!More videos/info: http://vihart.com/doodlingDoodling Snakes + Graphs: ttp://www.youtube.com/watch?v=heKK95DAKmsDoodling Stars: http://www.youtube.com/watch?v=CfJzrmS9UfYhttp://vihart.com", "slug": "doodling-in-math-class-binary-trees"}, {"path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-sick-number-games/", "id": "Yhlv5Aeuo_k", "title": "Doodling in math: Sick number games", "kind": "Video", "description": "I don't even know if this makes sense. Boo cold.\n\nhttp://en.wikipedia.org/wiki/Ulam_spiral\n\nDoodling in Math Class videos: http://vihart.com/doodling", "slug": "doodling-in-math-sick-number-games"}, {"path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-squiggle-inception/", "id": "ik2CZqsAw28", "title": "Doodling in math: Squiggle inception", "kind": "Video", "description": "How to draw squiggles like a Hilbert.", "slug": "doodling-in-math-class-squiggle-inception"}, {"path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-connecting-dots/", "id": "v-pyuaThp-c", "title": "Doodling in math: Connecting dots", "kind": "Video", "description": "Anti-parabola propoganda, plus musing on math class, cardioids, connect the dots, envelopes of lines, even a bit of origami.Extra points to a certain Andrea whose line-enveloped Hilbert curve inspired me to finish this video.", "slug": "doodling-in-math-class-connecting-dots"}, {"path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-triangle-party/", "id": "o6KlpIWhbcw", "title": "Doodling in math: Triangle party", "kind": "Video", "description": "Triangles!", "slug": "doodling-in-math-class-triangle-party"}, {"path": "khan/math/recreational-math/vi-hart/doodling-in-math/doodling-in-math-class-snakes-graphs/", "id": "heKK95DAKms", "title": "Doodling in math: Snakes and graphs", "kind": "Video", "description": "More videos/info: http://vihart.com/doodlingDoodling Stars: http://www.youtube.com/watch?v=CfJzrmS9UfYDoodling Binary Trees: http://www.youtube.com/watch?v=e4MSN6IImpIhttp://vihart.com", "slug": "doodling-in-math-class-snakes-graphs"}, {"path": "khan/math/recreational-math/vi-hart/doodling-in-math/dragons/", "id": "EdyociU35u8", "title": "Doodling in math: Dragons", "kind": "Video", "slug": "dragons"}, {"path": "khan/math/recreational-math/vi-hart/doodling-in-math/dragondungeons/", "id": "dsvLLKQCxeA", "title": "Doodling in math: Dragon dungeons", "kind": "Video", "slug": "dragondungeons"}, {"path": "khan/math/recreational-math/vi-hart/doodling-in-math/dragonscales/", "id": "Oc8sWN_jNF4", "title": "Doodling in math: Dragon scales", "kind": "Video", "slug": "dragonscales"}], "in_knowledge_map": false, "description": "Let's say you're me and you're in math class\u2026", "node_slug": "doodling-in-math", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/vi-hart/doodling-in-math", "extended_slug": "math/recreational-math/vi-hart/doodling-in-math", "kind": "Topic", "slug": "doodling-in-math"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/vi-hart/hexaflexagons/", "id": "hexaflexagons", "hide": false, "title": "Hexaflexagons", "child_data": [{"kind": "Video", "id": "1064685143"}, {"kind": "Video", "id": "1076084869"}, {"kind": "Video", "id": "1088148940"}, {"kind": "Video", "id": "1164411134"}], "children": [{"path": "khan/math/recreational-math/vi-hart/hexaflexagons/hexaflexagons/", "id": "VIVIegSt81k", "title": "Hexaflexagons", "kind": "Video", "description": "Hooraaaay flexagons! Next hexaflexagon video in one week. Happy October!More info coming soon.", "slug": "hexaflexagons"}, {"path": "khan/math/recreational-math/vi-hart/hexaflexagons/hexaflexagons-2/", "id": "paQ10POrZh8", "title": "Hexaflexagons 2", "kind": "Video", "description": "This video is based on, and in honor of, Martin Gardner's column from 1956, \"Hexaflexagons,\" which can be found here: http://maa.org/pubs/focus/Gardner_Hexaflexagons12_1956.pdf. For more information, see the top comment below.", "slug": "hexaflexagons-2"}, {"path": "khan/math/recreational-math/vi-hart/hexaflexagons/hexaflexagon-safety-guide/", "id": "AmN0YyaTD60", "title": "Hexaflexagon safety guide", "kind": "Video", "description": "Don't let a flexigatastrophe happen to you! Happy Hexaflexagon Month, in honor of Martin Gardner. Yes, we've been encouraging recreational use of hexaflexagons and even hexaflexagon parties to happen on Oct. 21, but be sure to flex responsibly.This is my third hexaflexagon video this month. The first two are also awesome.Hexaflexagons: http://youtu.be/VIVIegSt81k Hexaflexagons 2: http://youtu.be/paQ10POrZh8To learn more about flexagons, Martin Gardner, or hosting a hexaflexagon party, go here: http://www.puzzles.com/hexaflexagonI stole the \"hexaflexadyslexia\" joke from @matthetube: https://twitter.com/matthetube/status/255446894128529408I'm @vihartvihart. Happy Flexing!", "slug": "hexaflexagon-safety-guide"}, {"path": "khan/math/recreational-math/vi-hart/hexaflexagons/flex-mex/", "id": "GTwrVAbV56o", "title": "Flex Mex", "kind": "Video", "description": "Might as well.", "slug": "flex-mex"}], "in_knowledge_map": false, "description": "Since it's shaped like a hexagon and flex rhymes with hex, hexaflexagon it is!", "node_slug": "hexaflexagons", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/vi-hart/hexaflexagons", "extended_slug": "math/recreational-math/vi-hart/hexaflexagons", "kind": "Topic", "slug": "hexaflexagons"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/vi-hart/pi-tau/", "id": "pi-tau", "hide": false, "title": "About pi and tau", "child_data": [{"kind": "Video", "id": "877506826"}, {"kind": "Video", "id": "538086220"}, {"kind": "Video", "id": "756416991"}, {"kind": "Video", "id": "656321710"}, {"kind": "Video", "id": "xc562d375"}], "children": [{"path": "khan/math/recreational-math/vi-hart/pi-tau/a-song-about-a-circle-constant/", "id": "FtxmFlMLYRI", "title": "A song about a circle constant", "kind": "Video", "description": "Happy Tau Day! This is a song about Tau! Other Tau things you should see:Pi is (still) Wrong: http://youtu.be/jG7vhMMXagQ What Tau Sounds Like: http://youtu.be/3174T-3-59QThe Tau Manifesto: http://tauday.com/", "slug": "a-song-about-a-circle-constant"}, {"path": "khan/math/recreational-math/vi-hart/pi-tau/pi-is-still-wrong/", "id": "jG7vhMMXagQ", "title": "Pi is (still) wrong.", "kind": "Video", "description": "Please excuse the simple math and spelling errors. You shouldn't believe anything I say without double-checking even at the best of times.\n\nGo here: http://tauday.com/\nand here: http://www.math.utah.edu/~palais/pi.html\n\nMe: http://vihart.com", "slug": "pi-is-still-wrong"}, {"path": "khan/math/recreational-math/vi-hart/pi-tau/rhapsody-on-the-proof-of-pi-4/", "id": "D2xYjiL8yyE", "title": "Rhapsody on the proof of pi = 4", "kind": "Video", "description": "Correction: when I mark where pi is on the graph, I meant pi/2!\nNote: If this video were supposed to be teaching you, I'd probably have to make it boring and say that in one sense of limits, spoiler alert, you actually do approach a circle and a line, solving the apparent paradox by saying that the invariant of length does not hold over infinity. Luckily I am an artist, and this is a Rhapsody, and instead of \"learning,\" you get to actually think, if you like.", "slug": "rhapsody-on-the-proof-of-pi-4"}, {"path": "khan/math/recreational-math/vi-hart/pi-tau/are-shakespeare-s-plays-encoded-within-pi/", "id": "uXoh6vi6J5U", "title": "Are Shakespeare's plays encoded within pi?", "kind": "Video", "description": "Special thanks to Toby (or not Toby) for playing Dog Hamlet. This cool website lets you search the first 200,000,000 digits of Pi. See if your phone number or encoded name is in there! http://www.angio.net/pi/piquery Seven Sonnets: Are Shakespeare's plays encoded within Pi? The truth is: we don't know, but we suspect They're somewhere in those digits.", "slug": "are-shakespeare-s-plays-encoded-within-pi"}, {"path": "khan/math/recreational-math/vi-hart/pi-tau/anti-pi-rant-2014/", "id": "5iUh_CSjaSw", "title": "Anti-Pi Rant, 3/14/14", "kind": "Video", "description": "Sorry, Pi lovers! Maybe pick a better favorite number next time?", "slug": "anti-pi-rant-2014"}], "in_knowledge_map": false, "description": "When you want to make a circle, how is it done? Well you probably will start with the radius one.", "node_slug": "pi-tau", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/vi-hart/pi-tau", "extended_slug": "math/recreational-math/vi-hart/pi-tau", "kind": "Topic", "slug": "pi-tau"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/vi-hart/singing/", "id": "singing", "hide": false, "title": "Singing (and noises)", "child_data": [{"kind": "Video", "id": "756692482"}, {"kind": "Video", "id": "538061176"}, {"kind": "Video", "id": "538105060"}, {"kind": "Video", "id": "xf320cb16"}], "children": [{"path": "khan/math/recreational-math/vi-hart/singing/doodle-music/", "id": "Av_Us6xHkUc", "title": "Doodle music", "kind": "Video", "description": "A visual and musical expression of mathematical symmetry groups. The transformations done to the video are equivalent to the transformations done to the notes.\n\nThese type of repeating patterns are called frieze patterns. A couple wallpaper groups are also represented.", "slug": "doodle-music"}, {"path": "khan/math/recreational-math/vi-hart/singing/binary-hand-dance/", "id": "OCYZTg3jahU", "title": "Binary hand dance", "kind": "Video", "description": "Thanks to my bro for the music! He's at christopherhart2010@gmail.com\n\nThanks to my other bro for hand dancin' and throwing money at me, and special thanks to my mamma and grandma for their guest appearances.", "slug": "binary-hand-dance"}, {"path": "khan/math/recreational-math/vi-hart/singing/what-is-up-with-noises-the-science-and-mathematics-of-sound-frequency-and-pitch/", "id": "i_0DXxNeaQ0", "title": "What is up with noises? (The science and mathematics of sound, frequency, and pitch)", "kind": "Video", "description": "Accuracy not guaranteed. Get Audacity and play! http://audacity.sourceforge.net/\n\nCorrection: it is the \"Basilar\" membrane, which is what I say, but somehow between recording the script and actually drawing the stuff I got confused and thought I just pronounced my Vs poorly. Always sad to have such a simple and glaring error in something I put hundreds of hours of work into, but a \"Vasilar\" membrane can be the kind that a Vi draws to explain Viola Vibrations, I guess! Making up new words is just so prolightfully awstastic.\n\nProps to my Bro for excellent and creative swing pushing, and to my Mamma for filming it.\n\nExtra special thanks to my generous donators, without whom I would not have been able to create this video. Because of your support, I have the equipment, time, and take-out Thai food necessary for doing stuff like this.", "slug": "what-is-up-with-noises-the-science-and-mathematics-of-sound-frequency-and-pitch"}, {"path": "khan/math/recreational-math/vi-hart/singing/folding-space-time/", "id": "WkmPDOq2WfA", "title": "Folding space-time", "kind": "Video", "description": "Music box, backwards Bach, orbifolds and wooden bowl.", "slug": "folding-space-time"}], "in_knowledge_map": false, "description": "The title says it all...", "node_slug": "singing", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/vi-hart/singing", "extended_slug": "math/recreational-math/vi-hart/singing", "kind": "Topic", "slug": "singing"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/vi-hart/mobius-strips/", "id": "mobius-strips", "hide": false, "title": "Mobius strips", "child_data": [{"kind": "Video", "id": "728954151"}, {"kind": "Video", "id": "538068078"}], "children": [{"path": "khan/math/recreational-math/vi-hart/mobius-strips/math-improv-fruit-by-the-foot/", "id": "Am-a5x9DGjg", "title": "Math improv: Fruit by the foot", "kind": "Video", "description": "Playing mathematically with fruits by the foot.\nMobius Story, Wind and Mr. Ug: http://www.youtube.com/watch?v=4mdEsouIXGM\nMobius Candy buttons: http://www.youtube.com/watch?v=OOLIB3cjFqw\nMobius Music box: http://www.youtube.com/watch?v=3iMI_uOM_fY\n\nDoodling Snakes + Graphs (Useful for drawing Borromean rings): http://youtu.be/heKK95DAKms", "slug": "math-improv-fruit-by-the-foot"}, {"path": "khan/math/recreational-math/vi-hart/mobius-strips/m-bius-story-wind-and-mr-ug/", "id": "4mdEsouIXGM", "title": "Mobius story: Wind and Mr. Ug", "kind": "Video", "description": "A cautionary tale. Other Mobius videos:Candy Buttons http://www.youtube.com/watch?v=OOLIB3cjFqwM\u00f6bius Music Box http://www.youtube.com/watch?v=3iMI_uOM_fYWikipedia links:http://en.wikipedia.org/wiki/M%C3%B6bius_striphttp://en.wikipedia.org/wiki/FlatlandThis is the book you should get if you want to know all things M\u00f6bius: http://www.amazon.com/dp/1560259523?tag=vihartcom-20This story was inspired by the novel Flatland: http://www.amazon.com/dp/019953750X?tag=vihartcom-20There's a pretty cool movie version: http://www.amazon.com/dp/1604615370?tag=vihartcom-20Me: http://vihart.com", "slug": "m-bius-story-wind-and-mr-ug"}], "in_knowledge_map": false, "description": "Playing mathematically with strips!", "node_slug": "mobius-strips", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/vi-hart/mobius-strips", "extended_slug": "math/recreational-math/vi-hart/mobius-strips", "kind": "Topic", "slug": "mobius-strips"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/vi-hart/thanksgiving-math/", "id": "thanksgiving-math", "hide": false, "title": "Thanksgiving math", "child_data": [{"kind": "Video", "id": "1164366223"}, {"kind": "Video", "id": "1164209971"}, {"kind": "Video", "id": "1164332939"}, {"kind": "Video", "id": "1164444043"}], "children": [{"path": "khan/math/recreational-math/vi-hart/thanksgiving-math/green-bean-matherole/", "id": "XwIs1nlDQ2I", "title": "Green bean matherole", "kind": "Video", "description": "This Thanksgiving, make sure your table isn't missing the all-important green bean matherole. Pick your favorite vector field and have at it!\n\nMathed Potatoes: http://youtu.be/F5RyVWI4Onk\nBorromean Onion Rings: http://youtu.be/4tsjCND2ZfM\nTurduckenen-duckenen: http://youtu.be/pjrI91J6jOw", "slug": "green-bean-matherole"}, {"path": "khan/math/recreational-math/vi-hart/thanksgiving-math/borromean-onion-rings/", "id": "4tsjCND2ZfM", "title": "Borromean onion rings", "kind": "Video", "description": "Borromean Onion Rings, the perfect way to top your Green Bean Matherole! Borromean onion rings were invented by special guest Marc ten Bosch (http://marctenbosch.com). Also shown are gelatinous cranberry cylinder, bread spheres and butter prism, mathed potatoes, apple pie, and pumpkin tau.\n\nMathed Potatoes: http://youtu.be/F5RyVWI4Onk\nGreen Bean Matherole: http://youtu.be/XwIs1nlDQ2I\nTurduckenen-duckenen: http://youtu.be/pjrI91J6jOw", "slug": "borromean-onion-rings"}, {"path": "khan/math/recreational-math/vi-hart/thanksgiving-math/optimal-potatoes/", "id": "F5RyVWI4Onk", "title": "Optimal potatoes", "kind": "Video", "description": "With Thanksgiving just around the corner here in the US, it is important to know how to arrange mathed potatoes on your plate for maximum gravy. Also shown are bread spheres, butter prism, and gelatinous cranberry cylinder. \n\nGreen Bean Matherole: http://youtu.be/XwIs1nlDQ2I\nBorromean Onion Rings: http://youtu.be/4tsjCND2ZfM\nTurduckenen-duckenen: http://youtu.be/pjrI91J6jOw", "slug": "optimal-potatoes"}, {"path": "khan/math/recreational-math/vi-hart/thanksgiving-math/thanksgiving-turduckenen-duckenen/", "id": "pjrI91J6jOw", "title": "Thanksgiving turduckenen-duckenen", "kind": "Video", "description": "Forget turducken... I'm stuffing my turkey with two ducks, stuffed with four hens, stuffed with eight quail eggs. Honestly, I do not recommend trying this yourself.\n\nSo what's your favourite naming scheme: breadth-first, depth-first, or inordered binary tree traversal?\n\nMathed Potatoes: http://youtu.be/F5RyVWI4Onk\nGreen Bean Matherole: http://youtu.be/XwIs1nlDQ2I\nBorromean Onion Rings: http://youtu.be/4tsjCND2ZfM", "slug": "thanksgiving-turduckenen-duckenen"}], "in_knowledge_map": false, "description": "Mathed potatoes, Borromean onion rings, green bean matheroles and Turduckenen-duckenen (yes, you read that right)", "node_slug": "thanksgiving-math", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/vi-hart/thanksgiving-math", "extended_slug": "math/recreational-math/vi-hart/thanksgiving-math", "kind": "Topic", "slug": "thanksgiving-math"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/vi-hart/infinity/", "id": "infinity", "hide": false, "title": "Infinity . . .", "child_data": [{"kind": "Video", "id": "728889535"}, {"kind": "Video", "id": "x9b8791fe"}, {"kind": "Video", "id": "x278d57f2"}], "children": [{"path": "khan/math/recreational-math/vi-hart/infinity/9-999-reasons-that-999-1/", "id": "TINfzxSnnIE", "title": "9.999... reasons that .999... = 1", "kind": "Video", "description": "Point Nine Repeating Equals One! 9.999... reasons in 9.999... minutes. Bonus points if you can name all 9.999... lords a-leaping. Dear YouTube, wouldn't it be nice if I could include the full script with this video? A larger character limit would not be unreasonable.", "slug": "9-999-reasons-that-999-1"}, {"path": "khan/math/recreational-math/vi-hart/infinity/kinds-of-infinity/", "id": "23I5GS4JiDg", "title": "How many kinds of infinity are there?", "kind": "Video", "slug": "kinds-of-infinity"}, {"path": "khan/math/recreational-math/vi-hart/infinity/proof-infinities/", "id": "lA6hE7NFIK0", "title": "Proof some infinities are bigger than other infinities", "kind": "Video", "slug": "proof-infinities"}], "in_knowledge_map": false, "description": "Understanding infinity (all different kinds!). Countable and uncountable infinities. Bigger and smaller infinities.", "node_slug": "infinity", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/vi-hart/infinity", "extended_slug": "math/recreational-math/vi-hart/infinity", "kind": "Topic", "slug": "infinity"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/", "id": "vi-cool-stuff", "hide": false, "title": "Other cool stuff", "child_data": [{"kind": "Video", "id": "840477047"}, {"kind": "Video", "id": "538083240"}, {"kind": "Video", "id": "728958232"}, {"kind": "Video", "id": "994354912"}, {"kind": "Video", "id": "728836846"}, {"kind": "Video", "id": "538041623"}, {"kind": "Video", "id": "538012734"}, {"kind": "Video", "id": "537978634"}, {"kind": "Video", "id": "1226668514"}, {"kind": "Video", "id": "xfe49e654"}, {"kind": "Video", "id": "xb53f2622"}, {"kind": "Video", "id": "x159b5b13"}], "children": [{"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/what-was-up-with-pythagoras/", "id": "X1E7I7_r3Cw", "title": "What was up with Pythagoras?", "kind": "Video", "description": "Pythagoras had a problem with beans and irrationality. What really happened? I don't know! The square root of two is irrational, and beans are delicious.", "slug": "what-was-up-with-pythagoras"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/origami-proof-of-the-pythagorean-theorem/", "id": "z6lL83wl31E", "title": "Origami proof of the Pythagorean theorem", "kind": "Video", "description": "Leave your homework in the comments. Extra points for clarity and conciseness!\n\nSpecial thanks to my peeps at NYU where the idea for this video popped up during discussion.", "slug": "origami-proof-of-the-pythagorean-theorem"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/wau-the-most-amazing-ancient-and-singular-number/", "id": "GFLkou8NvJo", "title": "Wau: The most amazing, ancient, and singular number", "kind": "Video", "description": "What other amazing properties of Wau can you think of? Leave them in the comments.", "slug": "wau-the-most-amazing-ancient-and-singular-number"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/dialogue-for-2/", "id": "dBVoIUASFS0", "title": "Dialogue for 2", "kind": "Video", "description": "A dialogue with the number 2, with special guest Brady Haran of Numberphile and other channels!\nhttp://www.youtube.com/user/numberphile\nhttp://www.youtube.com/user/periodicvideos\nhttp://www.youtube.com/user/sixtysymbols", "slug": "dialogue-for-2"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/fractal-fractions/", "id": "a5z-OEIfw3s", "title": "Fractal fractions", "kind": "Video", "description": "How to make snazzy-lookin' fractal equations using simple algebra. For more abacabadabacaba: http://www.abacaba.org/ and http://books.google.com/books?id=QpPlxwSa8akC&pg=PA60&lpg=PA60&dq=abacabadabacaba+%22martin+gardner%22&source=bl&ots=92eAyvrZGV&sig=J2uvF2DAyn9kY8nSarSy-XIXW74&hl=en&sa=X&ei=Np45T4K9GYixiQK92NG2Bg&ved=0CCEQ6AEwAA#v=onepage&q&f=false", "slug": "fractal-fractions"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/how-to-snakes/", "id": "Gx5D09s5X6U", "title": "How to snakes", "kind": "Video", "description": "Snakes!\n\nSnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakesnakes.\n\nme: vihart.com\n\nYou can get a box here:\nhttp://www.amazon.com/dp/B003I6USDW?tag=vihartcom-20", "slug": "how-to-snakes"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/re-visual-multiplication-and-48-2-9-3/", "id": "a-e8fzqv3CE", "title": "Re: Visual multiplication and 48/2(9+3)", "kind": "Video", "description": "A quick response to some mathy things going around.", "slug": "re-visual-multiplication-and-48-2-9-3"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/the-gauss-christmath-special/", "id": "sxnX5_LbBDU", "title": "The Gauss Christmath Special", "kind": "Video", "description": "Christmas ain't over yet. The 12th day is Jan. 6th!\n\nYou can get just the song here: http://vihart.com/music/gauss12days.mp3\n\nhttp://vihart.com", "slug": "the-gauss-christmath-special"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/snowflakes-starflakes-and-swirlflakes/", "id": "8EmhGOQ-DNQ", "title": "Snowflakes, starflakes, and swirlflakes", "kind": "Video", "description": "Unusual variations on the paper snowflake.", "slug": "snowflakes-starflakes-and-swirlflakes"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/sphereflakes/", "id": "toKu2-qzJeM", "title": "Sphereflakes", "kind": "Video", "description": "Folding and cutting spheres.\n\nAwesome symmetry balls include card constructions by George Hart, which you can learn about here (and others are on georgehart.com): http://youtu.be/YBUEYrzMijA\nand the Gardner Ball by Oskar van Deventer with design by Scott Kim made in honor of Martin Gardner, which you can learn about here: http://youtu.be/rVHXlltXIlI\nand the Wolfram rhombic hexacontahedron thingy, and others!", "slug": "sphereflakes"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/reel/", "id": "WU3AlAOCxN0", "title": "Reel", "kind": "Video", "description": "This isn't the epic video I've been working on for months, I just couldn't sleep last night and had been reading too much Borges so this fell out.", "slug": "reel"}, {"path": "khan/math/recreational-math/vi-hart/vi-cool-stuff/vilog/", "id": "N-7tcTIrers", "title": "How I Feel About Logarithms", "kind": "Video", "slug": "vilog"}], "in_knowledge_map": false, "description": "Pythagoras, snakes, fractals, snowflakes...", "node_slug": "vi-cool-stuff", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/vi-hart/vi-cool-stuff", "extended_slug": "math/recreational-math/vi-hart/vi-cool-stuff", "kind": "Topic", "slug": "vi-cool-stuff"}], "in_knowledge_map": false, "description": "Recreational mathematics and inspirational videos by resident mathemusician Vi Hart", "node_slug": "vi-hart", "render_type": "Topic", "topic_page_url": "/math/recreational-math/vi-hart", "extended_slug": "math/recreational-math/vi-hart", "kind": "Topic", "slug": "vi-hart"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/recreational-math/puzzles/", "id": "puzzles", "hide": false, "title": "Puzzles", "child_data": [{"kind": "Topic", "id": "xffb4773d"}, {"kind": "Topic", "id": "x07e9d37e"}, {"kind": "Topic", "id": "xcfb622f2"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/puzzles/brain-teasers/", "id": "brain-teasers", "hide": false, "title": "Brain teasers", "child_data": [{"kind": "Video", "id": "x2ed6c9cb"}, {"kind": "Video", "id": "x60953191"}, {"kind": "Video", "id": "353049"}, {"kind": "Video", "id": "383058"}, {"kind": "Video", "id": "404032"}, {"kind": "Video", "id": "419004"}, {"kind": "Video", "id": "427002"}, {"kind": "Video", "id": "381049"}, {"kind": "Video", "id": "390056"}, {"kind": "Video", "id": "415005"}, {"kind": "Video", "id": "374053"}], "children": [{"path": "khan/math/recreational-math/puzzles/brain-teasers/cheryls-birthday/", "id": "S5LEdJfCsHM", "title": "Cheryl's birthday", "kind": "Video", "description": "Deductive reasoning problem from Singapore.", "slug": "cheryls-birthday"}, {"path": "khan/math/recreational-math/puzzles/brain-teasers/finding-heavier-ball/", "id": "ZN48Ub3k8uE", "title": "Heavier ball", "kind": "Video", "slug": "finding-heavier-ball"}, {"path": "khan/math/recreational-math/puzzles/brain-teasers/liar-truthteller-brain-teaser/", "id": "69rDtSpshAw", "title": "Liar truth-teller brain teaser", "kind": "Video", "description": "How to get correct advice when you can only ask one question from either a liar or a truth-teller (when you don't know who is what)", "slug": "liar-truthteller-brain-teaser"}, {"path": "khan/math/recreational-math/puzzles/brain-teasers/toggler-brain-teaser/", "id": "l3OkPYhDi9w", "title": "Toggler brain teaser", "kind": "Video", "description": "Separating the truthteller from the togglers!", "slug": "toggler-brain-teaser"}, {"path": "khan/math/recreational-math/puzzles/brain-teasers/alien-abduction-brain-teaser/", "id": "K4pocYXOmTQ", "title": "Alien abduction brain teaser", "kind": "Video", "description": "Saving Earth from becoming a mushroom farm.", "slug": "alien-abduction-brain-teaser"}, {"path": "khan/math/recreational-math/puzzles/brain-teasers/brain-teaser-blue-forehead-room/", "id": "rBaCDC52NOY", "title": "Blue forehead room brain teaser", "kind": "Video", "description": "What happens when 100 perfect logicians have to figure out if they each have a blue forehead?", "slug": "brain-teaser-blue-forehead-room"}, {"path": "khan/math/recreational-math/puzzles/brain-teasers/blue-forehead-room-solution/", "id": "-xYkTJFbuM0", "title": "Blue forehead room solution", "kind": "Video", "description": "Do not watch before Blue Forehead Room. THIS IS THE SOLUTION!", "slug": "blue-forehead-room-solution"}, {"path": "khan/math/recreational-math/puzzles/brain-teasers/forehead-numbers-brain-teaser/", "id": "jqpQPxWj8gE", "title": "Forehead numbers brain teaser", "kind": "Video", "description": "The perfect logicians are at it again.", "slug": "forehead-numbers-brain-teaser"}, {"path": "khan/math/recreational-math/puzzles/brain-teasers/light-bulb-switching-brain-teaser/", "id": "WNhxkpmVQYw", "title": "Light bulb switching brain teaser", "kind": "Video", "description": "Turning light bulbs on and off.", "slug": "light-bulb-switching-brain-teaser"}, {"path": "khan/math/recreational-math/puzzles/brain-teasers/path-counting-brain-teaser/", "id": "9QduzzW10uA", "title": "Path counting brain teaser", "kind": "Video", "description": "Counting paths in a square", "slug": "path-counting-brain-teaser"}, {"path": "khan/math/recreational-math/puzzles/brain-teasers/3-d-path-counting-brain-teaser/", "id": "wRxzDOloS3o", "title": "3D path counting brain teaser", "kind": "Video", "description": "Extending the path counting to three dimensions", "slug": "3-d-path-counting-brain-teaser"}], "in_knowledge_map": false, "description": "Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!", "node_slug": "brain-teasers", "render_type": "UncuratedTutorial", "topic_page_url": "/math/recreational-math/puzzles/brain-teasers", "extended_slug": "math/recreational-math/puzzles/brain-teasers", "kind": "Topic", "slug": "brain-teasers"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/recreational-math/puzzles/transformation-puzzles/", "id": "transformation-puzzles", "hide": false, "title": "Transformation Puzzles", "child_data": [{"kind": "Exercise", "id": "x0a87a772"}, {"kind": "Exercise", "id": "x70dd3d10"}, {"kind": "Exercise", "id": "x4a227117"}], "children": [{"path": "khan/math/recreational-math/puzzles/transformation-puzzles/transformation-puzzles/", "id": "transformation-puzzles", "title": "Transformation puzzles 1", "slug": "transformation-puzzles", "kind": "Exercise"}, {"path": "khan/math/recreational-math/puzzles/transformation-puzzles/transformation-puzzles-1-5/", "id": "transformation-puzzles-1-5", "title": "Transformation puzzles 2", "slug": "transformation-puzzles-1-5", "kind": "Exercise"}, {"path": "khan/math/recreational-math/puzzles/transformation-puzzles/transformation-puzzles-2/", "id": "transformation-puzzles-2", "title": "Transformation puzzles 3", "slug": "transformation-puzzles-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Random puzzles involving rotating, reflecting, and dilating polygons.", "node_slug": "transformation-puzzles", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/puzzles/transformation-puzzles", "extended_slug": "math/recreational-math/puzzles/transformation-puzzles", "kind": "Topic", "slug": "transformation-puzzles"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/recreational-math/puzzles/lights-puzzles/", "id": "lights-puzzles", "hide": false, "title": "Lights Puzzles", "child_data": [{"kind": "Exercise", "id": "x7446ab1d"}, {"kind": "Exercise", "id": "x10090d91"}, {"kind": "Exercise", "id": "x4d74a217"}, {"kind": "Exercise", "id": "xa35bc00c"}, {"kind": "Exercise", "id": "x0c7b1846"}, {"kind": "Exercise", "id": "xc909e4f7"}], "children": [{"path": "khan/math/recreational-math/puzzles/lights-puzzles/lights-puzzles-1/", "id": "lights-puzzles-1", "title": "Lights Puzzles 1", "description": "Intro lights puzzles!", "slug": "lights-puzzles-1", "kind": "Exercise"}, {"path": "khan/math/recreational-math/puzzles/lights-puzzles/lights-puzzles-2/", "id": "lights-puzzles-2", "title": "Lights Puzzles 2", "description": "More lights puzzles!", "slug": "lights-puzzles-2", "kind": "Exercise"}, {"path": "khan/math/recreational-math/puzzles/lights-puzzles/lights-puzzles-3/", "id": "lights-puzzles-3", "title": "Lights Puzzles 3", "description": "Harder lights puzzles!", "slug": "lights-puzzles-3", "kind": "Exercise"}, {"path": "khan/math/recreational-math/puzzles/lights-puzzles/lights-puzzles-x-1/", "id": "lights-puzzles-x-1", "title": "Lights Puzzles X 1", "description": "Lights puzzles with Xs", "slug": "lights-puzzles-x-1", "kind": "Exercise"}, {"path": "khan/math/recreational-math/puzzles/lights-puzzles/lights-puzzles-x-2/", "id": "lights-puzzles-x-2", "title": "Lights Puzzles X 2", "description": "Harder X puzzles", "slug": "lights-puzzles-x-2", "kind": "Exercise"}, {"path": "khan/math/recreational-math/puzzles/lights-puzzles/lights-puzzles-x-3/", "id": "lights-puzzles-x-3", "title": "Lights Puzzles X 3", "description": "5x5 lights puzzles with Xs!", "slug": "lights-puzzles-x-3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Try to light up all the tiles!", "node_slug": "lights-puzzles", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/puzzles/lights-puzzles", "extended_slug": "math/recreational-math/puzzles/lights-puzzles", "kind": "Topic", "slug": "lights-puzzles"}], "in_knowledge_map": false, "description": "", "node_slug": "puzzles", "render_type": "Topic", "topic_page_url": "/math/recreational-math/puzzles", "extended_slug": "math/recreational-math/puzzles", "kind": "Topic", "slug": "puzzles"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/recreational-math/math-warmup/", "id": "math-warmup", "hide": false, "title": "Math warmups", "child_data": [{"kind": "Topic", "id": "xdc4e5195"}, {"kind": "Topic", "id": "x96dc2ffa"}, {"kind": "Topic", "id": "x58ba5892"}, {"kind": "Topic", "id": "x0b3fc298"}, {"kind": "Topic", "id": "x0289a3e9"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/recreational-math/math-warmup/probabilty-warmup/", "id": "probabilty-warmup", "hide": false, "title": "Expectation warmup", "child_data": [{"kind": "Video", "id": "x08aff79c"}, {"kind": "Exercise", "id": "x26523219"}, {"kind": "Video", "id": "xaa972292"}], "children": [{"path": "khan/math/recreational-math/math-warmup/probabilty-warmup/problem-of-points1/", "id": "o3y7CzT-LRk", "title": "Problem of Points", "kind": "Video", "description": "How should two people split the pot when they are interrupted midgame?", "slug": "problem-of-points1"}, {"path": "khan/math/recreational-math/math-warmup/probabilty-warmup/expectation-warmups/", "id": "expectation-warmups", "title": "Expectation warmup", "description": "Select the correct answer to prove your understanding", "slug": "expectation-warmups", "kind": "Exercise"}, {"path": "khan/math/recreational-math/math-warmup/probabilty-warmup/problem-of-points2/", "id": "tDdtAF3WtIY", "title": "Problem of Points 2", "kind": "Video", "slug": "problem-of-points2"}], "in_knowledge_map": false, "description": "The 'problem of points' is a classic problem Fermat and Pascal famously debated in the 17th century. Their solution to this problem formed the basis of modern day probability theory. Now it's your turn to relive this challenge!", "node_slug": "probabilty-warmup", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/math-warmup/probabilty-warmup", "extended_slug": "math/recreational-math/math-warmup/probabilty-warmup", "kind": "Topic", "slug": "probabilty-warmup"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/recreational-math/math-warmup/random-sample-warmup/", "id": "random-sample-warmup", "hide": false, "title": "Random sampling warmup", "child_data": [{"kind": "Video", "id": "x508d1186"}, {"kind": "Exercise", "id": "x0541cb89"}, {"kind": "Video", "id": "x7cd8c62d"}, {"kind": "Scratchpad", "id": "6234315773968384"}], "children": [{"path": "khan/math/recreational-math/math-warmup/random-sample-warmup/random-sample-warmup1/", "id": "NaO01BO8X70", "title": "Introduction to random sampling", "kind": "Video", "description": "Can Sal predict the ratio of white to black balls without looking at all of them?", "slug": "random-sample-warmup1"}, {"path": "khan/math/recreational-math/math-warmup/random-sample-warmup/random-sample-warmup/", "id": "random-sample-warmup", "title": "Random sample warmup", "description": "Test your understanding of random sampling (7.SP.A.2)", "slug": "random-sample-warmup", "kind": "Exercise"}, {"path": "khan/math/recreational-math/math-warmup/random-sample-warmup/random-sample-warmup2/", "id": "8hcanS-j8Ho", "title": "Random sampling intuition", "kind": "Video", "slug": "random-sample-warmup2"}], "in_knowledge_map": false, "description": "Introduction to random sampling (also known as the weak law of large numbers)", "node_slug": "random-sample-warmup", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/math-warmup/random-sample-warmup", "extended_slug": "math/recreational-math/math-warmup/random-sample-warmup", "kind": "Topic", "slug": "random-sample-warmup"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/recreational-math/math-warmup/independent-events-warmup/", "id": "independent-events-warmup", "hide": false, "title": "Independent events warmup", "child_data": [{"kind": "Video", "id": "xb62131eb"}, {"kind": "Exercise", "id": "1425137862"}, {"kind": "Video", "id": "x7691eabf"}], "children": [{"path": "khan/math/recreational-math/math-warmup/independent-events-warmup/frequency-stability-1/", "id": "--ezF4qkjxg", "title": "Frequency stability", "kind": "Video", "description": "Is there a difference between a coinflip and a \"random\" guess?", "slug": "frequency-stability-1"}, {"path": "khan/math/recreational-math/math-warmup/independent-events-warmup/coin_flip_sequences/", "id": "coin_flip_sequences", "title": "Coin flip sequences", "description": "Determine if a sequence of heads and tails was generated with a fair coin, unfair coin, or human guesses.", "slug": "coin_flip_sequences", "kind": "Exercise"}, {"path": "khan/math/recreational-math/math-warmup/independent-events-warmup/frequency-stability-2/", "id": "l_EM39_z7AQ", "title": "Frequency stability solution", "kind": "Video", "description": "How to think about this problem", "slug": "frequency-stability-2"}], "in_knowledge_map": false, "description": "Introduction to independent events and frequency analysis using histograms.", "node_slug": "independent-events-warmup", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/math-warmup/independent-events-warmup", "extended_slug": "math/recreational-math/math-warmup/independent-events-warmup", "kind": "Topic", "slug": "independent-events-warmup"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/recreational-math/math-warmup/distribution-warmup/", "id": "distribution-warmup", "hide": false, "title": "Distribution warmup", "child_data": [{"kind": "Article", "id": "x0f5c1dbb"}, {"kind": "Exercise", "id": "xc99cea55"}], "children": [{"path": "khan/math/recreational-math/math-warmup/distribution-warmup/distribution-warmup/", "id": "distribution-warmup", "title": "Distribution warmup", "description": "Understand that a set of data collected to answer a statistical question has a distribution which can be described by its center, spread, and overall shape.", "slug": "distribution-warmup", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Introduction to probability distributions, center, spread, and overall shape. In this warmup we will discover the binomial distribution!", "node_slug": "distribution-warmup", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/math-warmup/distribution-warmup", "extended_slug": "math/recreational-math/math-warmup/distribution-warmup", "kind": "Topic", "slug": "distribution-warmup"}, {"icon_src": "", "contains": ["Video"], "path": "khan/math/recreational-math/math-warmup/arithmetic-warmups/", "id": "arithmetic-warmups", "hide": false, "title": "Arithmetic warmups", "child_data": [{"kind": "Video", "id": "x2ed287a2"}, {"kind": "Video", "id": "x978a47a3"}, {"kind": "Video", "id": "x49185f64"}], "children": [{"path": "khan/math/recreational-math/math-warmup/arithmetic-warmups/exponents-warmup/", "id": "UCCNoXqCGZQ", "title": "Exponentiation warmup", "kind": "Video", "description": "introduction to exponents and exponential growth", "slug": "exponents-warmup"}, {"path": "khan/math/recreational-math/math-warmup/arithmetic-warmups/baseten-warmup/", "id": "v3gdX07Q6qE", "title": "Place value warmup", "kind": "Video", "description": "Learn about place value using a toy with beads (an abacus).", "slug": "baseten-warmup"}, {"path": "khan/math/recreational-math/math-warmup/arithmetic-warmups/addition-warmup/", "id": "MzY6PTY0Bks", "title": "Addition with carrying warmup", "kind": "Video", "slug": "addition-warmup"}], "in_knowledge_map": false, "description": "Arithmetic warmups", "node_slug": "arithmetic-warmups", "render_type": "Tutorial", "topic_page_url": "/math/recreational-math/math-warmup/arithmetic-warmups", "extended_slug": "math/recreational-math/math-warmup/arithmetic-warmups", "kind": "Topic", "slug": "arithmetic-warmups"}], "in_knowledge_map": false, "description": "Introducing key concepts using physical analogies", "node_slug": "math-warmup", "render_type": "Topic", "topic_page_url": "/math/recreational-math/math-warmup", "extended_slug": "math/recreational-math/math-warmup", "kind": "Topic", "slug": "math-warmup"}], "in_knowledge_map": false, "description": "", "node_slug": "recreational-math", "render_type": "Subject", "topic_page_url": "/math/recreational-math", "extended_slug": "math/recreational-math", "kind": "Topic", "slug": "recreational-math"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/competition-math/", "id": "competition-math", "hide": false, "title": "Math contests", "child_data": [{"kind": "Topic", "id": "x822f1bfb"}, {"kind": "Topic", "id": "x214bc62e"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/competition-math/amc-10/", "id": "amc-10", "hide": false, "title": "AMC 10", "child_data": [{"kind": "Topic", "id": "xcd3d3167"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/competition-math/amc-10/2013-amc-10-a/", "id": "2013-amc-10-a", "hide": false, "title": "2013 AMC 10 A", "child_data": [{"kind": "Video", "id": "xfd00ae39"}, {"kind": "Video", "id": "x3fa96649"}, {"kind": "Video", "id": "x7f2f785d"}, {"kind": "Video", "id": "x00c2c7a3"}, {"kind": "Video", "id": "x23f0eb58"}], "children": [{"path": "khan/math/competition-math/amc-10/2013-amc-10-a/2013-amc-10-a-21-amc-12-a-17/", "id": "-UagBvxCReA", "title": "2013 AMC 10 A #21 / AMC 12 A #17", "kind": "Video", "description": "Video by Art of Problem Solving. \u00a0Problem from the MAA American Mathematics Competitions", "slug": "2013-amc-10-a-21-amc-12-a-17"}, {"path": "khan/math/competition-math/amc-10/2013-amc-10-a/2013-amc-10-a-22-amc-12-a-18/", "id": "rcLw4BlxaRs", "title": "2013 AMC 10 A #22 / AMC 12 A #18", "kind": "Video", "description": "Video by\u00a0Art of Problem Solving. \u00a0Problem from the MAA\u00a0American Mathematics Competitions", "slug": "2013-amc-10-a-22-amc-12-a-18"}, {"path": "khan/math/competition-math/amc-10/2013-amc-10-a/2013-amc-10-a-23-amc-12-a-19/", "id": "MyanDgvTb2g", "title": "2013 AMC 10 A #23 / AMC 12 A #19", "kind": "Video", "description": "Video by\u00a0Art of Problem Solving. \u00a0Problem from the MAA\u00a0American Mathematics Competitions", "slug": "2013-amc-10-a-23-amc-12-a-19"}, {"path": "khan/math/competition-math/amc-10/2013-amc-10-a/2013-amc-10-a-24/", "id": "duomXwMSPv8", "title": "2013 AMC 10 A #24", "kind": "Video", "description": "Video by\u00a0Art of Problem Solving. \u00a0Problem from the MAA\u00a0American Mathematics Competitions", "slug": "2013-amc-10-a-24"}, {"path": "khan/math/competition-math/amc-10/2013-amc-10-a/2013-amc-10-a-25/", "id": "cU9L1bTDePM", "title": "2013 AMC 10 A #25", "kind": "Video", "description": "Video by\u00a0Art of Problem Solving. \u00a0Problem from the MAA\u00a0American Mathematics Competitions", "slug": "2013-amc-10-a-25"}], "in_knowledge_map": false, "description": "Final five questions on the 2013 AMC 10 A. (Three of these problems are shared with the 2013 AMC 12 A.)\n\nVideos produced by Art of Problem Solving (www.aops.com). Problems from the MAA American Mathematics Competitions (amc.maa.org)", "node_slug": "2013-amc-10-a", "render_type": "Tutorial", "topic_page_url": "/math/competition-math/amc-10/2013-amc-10-a", "extended_slug": "math/competition-math/amc-10/2013-amc-10-a", "kind": "Topic", "slug": "2013-amc-10-a"}], "in_knowledge_map": false, "description": "The AMC 10 is part of the series of contests administered by the MAA American Mathematics Competitions that determines the United States team in the International Math Olympiad. The AMC 10 is a 25 question, 75 minute multiple choice test for students in 10th grade or below. Two versions of the AMC 10 are offered each year.\n\nThis content is brought to you by the Art of Problem Solving (www.aops.com)", "node_slug": "amc-10", "render_type": "Topic", "topic_page_url": "/math/competition-math/amc-10", "extended_slug": "math/competition-math/amc-10", "kind": "Topic", "slug": "amc-10"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/math/competition-math/aime/", "id": "aime", "hide": false, "title": "AIME", "child_data": [{"kind": "Topic", "id": "x595e11fb"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/competition-math/aime/2003-aime/", "id": "2003-aime", "hide": false, "title": "2003 AIME", "child_data": [{"kind": "Video", "id": "8187421"}, {"kind": "Video", "id": "8187422"}, {"kind": "Video", "id": "13179252"}, {"kind": "Video", "id": "13179253"}, {"kind": "Video", "id": "8187423"}, {"kind": "Video", "id": "8187424"}, {"kind": "Video", "id": "13179254"}, {"kind": "Video", "id": "13179255"}, {"kind": "Video", "id": "13179257"}, {"kind": "Video", "id": "13179256"}, {"kind": "Video", "id": "13179269"}, {"kind": "Video", "id": "13179258"}, {"kind": "Video", "id": "13179275"}, {"kind": "Video", "id": "13179276"}, {"kind": "Video", "id": "13179277"}, {"kind": "Video", "id": "13179280"}, {"kind": "Video", "id": "13179281"}, {"kind": "Video", "id": "13179278"}, {"kind": "Video", "id": "13179279"}, {"kind": "Video", "id": "13179282"}, {"kind": "Video", "id": "13179283"}, {"kind": "Video", "id": "13179284"}, {"kind": "Video", "id": "13179285"}], "children": [{"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-1/", "id": "JPQ8cfOsYxo", "title": "2003 AIME II problem 1", "kind": "Video", "description": "2003 AIME II Problem 1", "slug": "2003-aime-ii-problem-1"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-3/", "id": "JU67TL2L1CA", "title": "2003 AIME II problem 3", "kind": "Video", "description": "2003 AIME II Problem 3", "slug": "2003-aime-ii-problem-3"}, {"path": "khan/math/competition-math/aime/2003-aime/sum-of-factors-of-27000/", "id": "17st-s5gg10", "title": "Sum of factors of 27000", "kind": "Video", "slug": "sum-of-factors-of-27000"}, {"path": "khan/math/competition-math/aime/2003-aime/sum-of-factors-2/", "id": "tbQ_7zvRoN4", "title": "Sum of factors 2", "kind": "Video", "description": "Seeing the \"formula\" in the last method", "slug": "sum-of-factors-2"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-4-part-1/", "id": "gXnHodHNusg", "title": "2003 AIME II problem 4 (part 1)", "kind": "Video", "slug": "2003-aime-ii-problem-4-part-1"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-4-part-2/", "id": "wQ34EIfd-5A", "title": "2003 AIME II problem 4 (part 2)", "kind": "Video", "slug": "2003-aime-ii-problem-4-part-2"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-5/", "id": "EzE53aPGbrQ", "title": "2003 AIME II problem 5", "kind": "Video", "description": "Volume of a wedge cut from a cylindrical log", "slug": "2003-aime-ii-problem-5"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-5-minor-correction/", "id": "yXg5CYuCcU4", "title": "2003 AIME II problem 5 minor correction", "kind": "Video", "description": "2003 AIME II Problem 5 Minor Correction", "slug": "2003-aime-ii-problem-5-minor-correction"}, {"path": "khan/math/competition-math/aime/2003-aime/area-circumradius-formula-proof/", "id": "x_aax6LSRtE", "title": "Area circumradius formula proof", "kind": "Video", "description": "Proof of the formula relating the area of a triangle to its circumradius", "slug": "area-circumradius-formula-proof"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-6/", "id": "l9j26EOvTYc", "title": "2003 AIME II problem 6", "kind": "Video", "slug": "2003-aime-ii-problem-6"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-7/", "id": "jpKjXtywTlQ", "title": "2003 AIME II problem 7", "kind": "Video", "slug": "2003-aime-ii-problem-7"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-8/", "id": "ZFN63oTeYzc", "title": "2003 AIME II problem 8", "kind": "Video", "description": "Sequence from the product of 2 arithmetic sequences", "slug": "2003-aime-ii-problem-8"}, {"path": "khan/math/competition-math/aime/2003-aime/sum-of-polynomial-roots-proof/", "id": "9eWyvWq9CCs", "title": "Sum of polynomial roots (proof)", "kind": "Video", "description": "Sum of Polynomial Roots", "slug": "sum-of-polynomial-roots-proof"}, {"path": "khan/math/competition-math/aime/2003-aime/sum-of-squares-of-polynomial-roots/", "id": "bbeWLtarzrE", "title": "Sum of squares of polynomial roots", "kind": "Video", "description": "Sum of Squares of Polynomial Roots (Newton Sums)", "slug": "sum-of-squares-of-polynomial-roots"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-9/", "id": "ZSESJ8TeGSI", "title": "2003 AIME II problem 9", "kind": "Video", "description": "Sum of polynomial evaluated at roots of another polynomial", "slug": "2003-aime-ii-problem-9"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-10/", "id": "Hh3iY4tdkGI", "title": "2003 AIME II problem 10", "kind": "Video", "description": "perfect squares integers square root", "slug": "2003-aime-ii-problem-10"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-11-avi/", "id": "smtrrefmC40", "title": "2003 AIME II problem 11", "kind": "Video", "description": "A little trigonometry to figure out the area of a triangle", "slug": "2003-aime-ii-problem-11-avi"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-12/", "id": "KD46pC_KFWk", "title": "2003 AIME II problem 12", "kind": "Video", "description": "Minimum members in a committee", "slug": "2003-aime-ii-problem-12"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-13/", "id": "vKMNRcctwL4", "title": "2003 AIME II problem 13", "kind": "Video", "description": "Probability of moving to a vertex", "slug": "2003-aime-ii-problem-13"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-14/", "id": "Ec-BKdC8vOo", "title": "2003 AIME II problem 14", "kind": "Video", "description": "Trigonometry and geometry to find the area of an equilateral (but not regular) hexagon", "slug": "2003-aime-ii-problem-14"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-15-part-1/", "id": "2eLAEMRrR7Q", "title": "2003 AIME II problem 15 (part 1)", "kind": "Video", "description": "Finding the sum of the absolute value of the imaginary parts of the square of the roots of a crazy polynomial", "slug": "2003-aime-ii-problem-15-part-1"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-15-part-2/", "id": "TljVBB7gxbE", "title": "2003 AIME II problem 15 (part 2)", "kind": "Video", "description": "Finding the sum of the absolute value of the imaginary parts of the square of the roots of a crazy polynomial", "slug": "2003-aime-ii-problem-15-part-2"}, {"path": "khan/math/competition-math/aime/2003-aime/2003-aime-ii-problem-15-part-3/", "id": "JTpXK2mENH4", "title": "2003 AIME II problem 15 (part 3)", "kind": "Video", "description": "Finding the sum of the absolute value of the imaginary parts of the square of the roots of a crazy polynomial", "slug": "2003-aime-ii-problem-15-part-3"}], "in_knowledge_map": false, "description": "", "node_slug": "2003-aime", "render_type": "Tutorial", "topic_page_url": "/math/competition-math/aime/2003-aime", "extended_slug": "math/competition-math/aime/2003-aime", "kind": "Topic", "slug": "2003-aime"}], "in_knowledge_map": false, "description": "", "node_slug": "aime", "render_type": "Topic", "topic_page_url": "/math/competition-math/aime", "extended_slug": "math/competition-math/aime", "kind": "Topic", "slug": "aime"}], "in_knowledge_map": false, "description": "Problems from prestigious American middle and high school competitions.", "node_slug": "competition-math", "render_type": "Subject", "topic_page_url": "/math/competition-math", "extended_slug": "math/competition-math", "kind": "Topic", "slug": "competition-math"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/", "id": "on-sixth-grade-math", "hide": false, "title": "6th grade (Ontario)", "child_data": [{"kind": "Topic", "id": "x9922855d"}, {"kind": "Topic", "id": "xfc3287ad"}, {"kind": "Topic", "id": "x6e0861f7"}, {"kind": "Topic", "id": "x0162c9bd"}, {"kind": "Topic", "id": "x965d0011"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/", "id": "on-number-sense-numeration", "hide": false, "title": "Number Sense and Numeration", "child_data": [{"kind": "Topic", "id": "xe13a649c"}, {"kind": "Topic", "id": "x8606ef54"}, {"kind": "Topic", "id": "xd5ae854e"}, {"kind": "Topic", "id": "x82126946"}, {"kind": "Topic", "id": "x7e43d2e0"}, {"kind": "Topic", "id": "x189a274c"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-ratios-rates-percentages/", "id": "on-ratios-rates-percentages", "hide": false, "title": "Ratios, rates and percentages", "child_data": [{"kind": "Exercise", "id": "243479663"}, {"kind": "Exercise", "id": "245512773"}, {"kind": "Exercise", "id": "245530302"}, {"kind": "Exercise", "id": "xc4532d76"}, {"kind": "Exercise", "id": "3012"}, {"kind": "Exercise", "id": "3020"}, {"kind": "Exercise", "id": "x1face01c"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-ratios-rates-percentages/rate_problems_05/", "id": "rate_problems_0.5", "title": "Basic rate problems", "description": "Practice solving rate problems.", "slug": "rate_problems_05", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-ratios-rates-percentages/converting_decimals_to_percents/", "id": "converting_decimals_to_percents", "title": "Converting decimals to percents", "slug": "converting_decimals_to_percents", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-ratios-rates-percentages/converting_percents_to_decimals/", "id": "converting_percents_to_decimals", "title": "Converting percents to decimals", "slug": "converting_percents_to_decimals", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-ratios-rates-percentages/finding_percents/", "id": "finding_percents", "title": "Finding percents", "description": "Find a percent of a quantity as a rate per 100; solve problems involving finding the whole, given a part and the percent.", "slug": "finding_percents", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-ratios-rates-percentages/percentage_word_problems_1/", "id": "percentage_word_problems_1", "title": "Percent word problems", "description": "Practice solving word problems involving percents.", "slug": "percentage_word_problems_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-ratios-rates-percentages/units/", "id": "units", "title": "Units", "slug": "units", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-ratios-rates-percentages/solving-ratio-problems-with-tables/", "id": "solving-ratio-problems-with-tables", "title": "Ratio tables", "description": "Practice filling out tables of equivalent ratios.", "slug": "solving-ratio-problems-with-tables", "kind": "Exercise"}], "in_knowledge_map": false, "description": "A common application of numbers in real life (what is REAL life anyway, huh?) is through ratios, rates, and percentages. Whether following a recipe, changing the oil in a car, or determining the percentage earned on a test...these are skills you will use over and over. Ratios are simply another way to express fractions. Rates combine units of measurements to help us understand their relationship better. Percentages, like ratios, give us another way to express fractions and decimals. We'll explain each to you and then practice until you've mastered each concept.", "node_slug": "on-ratios-rates-percentages", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-number-sense-numeration/on-ratios-rates-percentages", "extended_slug": "math/on-sixth-grade-math/on-number-sense-numeration/on-ratios-rates-percentages", "kind": "Topic", "slug": "on-ratios-rates-percentages"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions/", "id": "on-fractions", "hide": false, "title": "Fractions", "child_data": [{"kind": "Video", "id": "x09cb1211"}, {"kind": "Exercise", "id": "461002061"}, {"kind": "Exercise", "id": "460972000"}, {"kind": "Exercise", "id": "537154517"}, {"kind": "Exercise", "id": "3015"}, {"kind": "Exercise", "id": "x273a2621"}, {"kind": "Exercise", "id": "x4a42576d"}, {"kind": "Exercise", "id": "x6e88b14f"}, {"kind": "Exercise", "id": "x247cd28c"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions/fractions-on-number-line-widget/", "id": "xeoVPSBP9WI", "title": "Fractions on number line widget", "kind": "Video", "description": "Learn how to use the Khan Academy number line widget.", "slug": "fractions-on-number-line-widget"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions/fractions_on_the_number_line_1/", "id": "fractions_on_the_number_line_1", "title": "Fractions on the number line", "description": "Plot and spot fractions on the number line.", "slug": "fractions_on_the_number_line_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions/fractions_on_the_number_line_2/", "id": "fractions_on_the_number_line_2", "title": "Unit fractions on the number line", "description": "Use unit fractions to think about the location of other fractions on the number line.", "slug": "fractions_on_the_number_line_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions/dividing_fractions_05/", "id": "dividing_fractions_0.5", "title": "Dividing unit fractions by whole numbers", "description": "Divide a unit fraction by a whole number.", "slug": "dividing_fractions_05", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions/dividing_fractions/", "id": "dividing_fractions", "title": "Dividing whole numbers by unit fractions", "description": "Practice dividing a whole number by a unit fraction.", "slug": "dividing_fractions", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions/division-with-fractions-and-whole-numbers/", "id": "division-with-fractions-and-whole-numbers", "title": "Division with fractions and whole numbers word problems", "description": "Solve and interpret division word problems that include whole numbers and fractions.", "slug": "division-with-fractions-and-whole-numbers", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions/understanding-dividing-fractions-by-fractions/", "id": "understanding-dividing-fractions-by-fractions", "title": "Understanding dividing fractions by fractions", "slug": "understanding-dividing-fractions-by-fractions", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions/dividing_fractions_15/", "id": "dividing_fractions_1.5", "title": "Dividing fractions", "description": "Practice dividing fractions by fractions. No negative numbers are used in this exercise.", "slug": "dividing_fractions_15", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions/dividing-fractions-by-fractions-word-problems/", "id": "dividing-fractions-by-fractions-word-problems", "title": "Dividing fractions word problems", "description": "Practice solving word problems by dividing fractions by fractions.", "slug": "dividing-fractions-by-fractions-word-problems", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's help you relate improper fractions to mixed numbers!", "node_slug": "on-fractions", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-number-sense-numeration/on-fractions", "extended_slug": "math/on-sixth-grade-math/on-number-sense-numeration/on-fractions", "kind": "Topic", "slug": "on-fractions"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/", "id": "on-multiplication-division", "hide": false, "title": "Multiplication and division", "child_data": [{"kind": "Exercise", "id": "xe98a7fb8"}, {"kind": "Exercise", "id": "3007"}, {"kind": "Exercise", "id": "xc3ddc4de"}, {"kind": "Exercise", "id": "x984640b4"}, {"kind": "Exercise", "id": "x26a42c4a"}, {"kind": "Exercise", "id": "x5ceeb3df"}, {"kind": "Exercise", "id": "13179402"}, {"kind": "Exercise", "id": "x0c170c28"}, {"kind": "Exercise", "id": "xbf8d6c82"}, {"kind": "Exercise", "id": "3008"}, {"kind": "Exercise", "id": "x9fbba1c4"}, {"kind": "Exercise", "id": "46563848"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/multiplication-with-place-value-understanding/", "id": "multiplication-with-place-value-understanding", "title": "Multiplication using place value understanding", "description": "Multiply a one-digit number by up to a four-digit number by decomposing the larger number.", "slug": "multiplication-with-place-value-understanding", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/multiplication_3/", "id": "multiplication_3", "title": "Multiplying 2 digits by 2 digits", "description": "Multiply 2 digits by 2 digits with carrying.", "slug": "multiplication_3", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/multiplying-by-4-digit-numbers-with-visual-models/", "id": "multiplying-by-4-digit-numbers-with-visual-models", "title": "Multiplying 4 digits by 1 digit with visual models", "description": "Use an area model to decompose the larger factor and multiply.", "slug": "multiplying-by-4-digit-numbers-with-visual-models", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/multiplying-2-digit-numbers-with-area-models/", "id": "multiplying-2-digit-numbers-with-area-models", "title": "Multiplying 2 digits by 2 digits with area models", "description": "Use an area model to decompose factors and multiply.", "slug": "multiplying-2-digit-numbers-with-area-models", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/comparing-with-multiplication/", "id": "comparing-with-multiplication", "title": "Comparing with multiplication", "description": "Rewrite multiplication equations as comparisons and comparisons as equations.", "slug": "comparing-with-multiplication", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/multiplicative-comparison-word-problems/", "id": "multiplicative-comparison-word-problems", "title": "Comparing with multiplication word problems", "description": "Select the equation that can be used to solve a word problem.", "slug": "multiplicative-comparison-word-problems", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/division_15/", "id": "division_1.5", "title": "Dividing by one-digit numbers (no remainders)", "description": "Divide two and three-digit numbers by a one-digit number.", "slug": "division_15", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/division-using-place-value-understanding/", "id": "division-using-place-value-understanding", "title": "Division using place value understanding", "description": "Decompose three and four-digit dividends to divide them by a one-digit divisor.", "slug": "division-using-place-value-understanding", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/multi-digit-division-with-visual-models/", "id": "multi-digit-division-with-visual-models", "title": "Dividing by one-digit numbers (visual models)", "description": "We can break up big division problems into smaller, easier problems.", "slug": "multi-digit-division-with-visual-models", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/division_2/", "id": "division_2", "title": "Division with remainders", "description": "Practice solving division problems where you divide by a one-digit number and the quotient has a remainder.", "slug": "division_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/multi-step-word-problems-with-whole-numbers/", "id": "multi-step-word-problems-with-whole-numbers", "title": "Multi-step word problems with whole numbers", "description": "Solve multi-step word problems, including estimation.\u00a0\u00a0Select the equation that can be used to solve a word problem.", "slug": "multi-step-word-problems-with-whole-numbers", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division/arithmetic_word_problems/", "id": "arithmetic_word_problems", "title": "Multiplication and division word problems", "description": "Word problems with simple multiplication and division. Some problems have remainders.", "slug": "arithmetic_word_problems", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's handle slightly more complicated multiplications and divisions. Now you'll become super good at it with a bit more practice! After these tutorials, you'll be comfortable dividing two digit whole numbers and decimals, whether they are in the divisor or dividend position. Pretty exciting, huh? Let me a hear a \"Yes!\"", "node_slug": "on-multiplication-division", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division", "extended_slug": "math/on-sixth-grade-math/on-number-sense-numeration/on-multiplication-division", "kind": "Topic", "slug": "on-multiplication-division"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/", "id": "on-place-decimal-operations", "hide": false, "title": "Place value and decimal operations", "child_data": [{"kind": "Exercise", "id": "x7adb0385"}, {"kind": "Exercise", "id": "xf8942d6c"}, {"kind": "Exercise", "id": "418343167"}, {"kind": "Exercise", "id": "xec809b3d"}, {"kind": "Exercise", "id": "x1f3cdba0"}, {"kind": "Exercise", "id": "xddf6d40a"}, {"kind": "Exercise", "id": "x74ce5d71"}, {"kind": "Exercise", "id": "66754977"}, {"kind": "Exercise", "id": "xae033bc0"}, {"kind": "Exercise", "id": "460969021"}, {"kind": "Exercise", "id": "460994266"}, {"kind": "Exercise", "id": "720725814"}, {"kind": "Exercise", "id": "xff411123"}, {"kind": "Exercise", "id": "x21f85e96"}, {"kind": "Exercise", "id": "x4376f820"}, {"kind": "Exercise", "id": "x08d6aacb"}, {"kind": "Exercise", "id": "520461717"}, {"kind": "Exercise", "id": "xa299dc79"}, {"kind": "Exercise", "id": "2010"}, {"kind": "Exercise", "id": "3009"}, {"kind": "Exercise", "id": "2008"}, {"kind": "Exercise", "id": "642900605"}, {"kind": "Exercise", "id": "3025"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/writing-and-interpreting-decimals/", "id": "writing-and-interpreting-decimals", "title": "Decimals in expanded form", "description": "Practice converting decimals between standard form and expanded form.", "slug": "writing-and-interpreting-decimals", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/comparing-decimal-place-value/", "id": "comparing-decimal-place-value", "title": "Comparing decimal place value", "description": "Compare two numbers to thousandths based on meanings of the digits in each place.", "slug": "comparing-decimal-place-value", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/understanding_decimals_place_value/", "id": "understanding_decimals_place_value", "title": "Money and decimal place value intuition", "description": "Select how many hundreds, tens, ones, tenths, hundredths, and thousandths make up a number.", "slug": "understanding_decimals_place_value", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/regrouping-whole-numbers/", "id": "regrouping-whole-numbers", "title": "Regrouping whole numbers", "description": "Regroup numbers in each place value (e.g., regroup 1 ten as 10 ones) to express whole numbers in different ways.", "slug": "regrouping-whole-numbers", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/regrouping-decimals/", "id": "regrouping-decimals", "title": "Regrouping decimals", "description": "Regroup numbers in each place value (e.g., regroup 1 ten as 10 ones) to express decimals in different ways.", "slug": "regrouping-decimals", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/comparing_decimals_2/", "id": "comparing_decimals_2", "title": "Comparing decimals (tenths, hundredths, and thousandths)", "description": "Compare two decimals with digits up to the thousandths using >, <, and = symbols.", "slug": "comparing_decimals_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/ordering_decimals/", "id": "ordering_decimals", "title": "Ordering decimals", "description": "Order 5 decimals with digits up to the thousandths from least to greatest.", "slug": "ordering_decimals", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/rounding_numbers/", "id": "rounding_numbers", "title": "Rounding decimals", "description": "Round decimals and whole numbers to the nearest thousand, hundred, ten, one, tenth, or hundredth.", "slug": "rounding_numbers", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/rounding-decimals/", "id": "rounding-decimals", "title": "Rounding decimals 2", "description": "Round decimals using number lines. \u00a0Select numbers that round to a given value.", "slug": "rounding-decimals", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/decimals_on_the_number_line_1/", "id": "decimals_on_the_number_line_1", "title": "Decimals on the number line 1", "description": "Practice finding decimal numbers on the number line. Decimals are limited to tenths in these problems.", "slug": "decimals_on_the_number_line_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/decimals_on_the_number_line_2/", "id": "decimals_on_the_number_line_2", "title": "Decimals on the number line 2", "description": "Practice finding decimal numbers on the number line. Decimals are limited to hundredths in these problems.", "slug": "decimals_on_the_number_line_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/adding_decimals_2/", "id": "adding_decimals_2", "title": "Adding decimals 2", "description": "Practice adding two numbers that are written to the tenths, hundredths, or thousandths place.", "slug": "adding_decimals_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/subtracting_decimals_2/", "id": "subtracting_decimals_2", "title": "Subtracting decimals 2", "description": "Practice adding two numbers that are written to the tenths, hundredths, or thousandths place.", "slug": "subtracting_decimals_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/powers-of-ten/", "id": "powers-of-ten", "title": "Powers of ten", "description": "Practice evaluating powers of ten.", "slug": "powers-of-ten", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/multiplying-and-dividing-whole-numbers-by-powers-of-10/", "id": "multiplying-and-dividing-whole-numbers-by-powers-of-10", "title": "DEPRECATED Multiplying and dividing whole numbers by powers of 10", "description": "Multiply and divide whole numbers by powers of ten", "slug": "multiplying-and-dividing-whole-numbers-by-powers-of-10", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/multiplying-and-dividing-decimals-by-powers-of-10/", "id": "multiplying-and-dividing-decimals-by-powers-of-10", "title": "DEPRECATED Multiplying and dividing decimals by powers of 10", "description": "Multiply and dividing decimals by powers of 10.", "slug": "multiplying-and-dividing-decimals-by-powers-of-10", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/understanding_moving_the_decimal/", "id": "understanding_moving_the_decimal", "title": "Understanding moving the decimal", "description": "Give the number of tens a number is being multiplied or divided by when the decimal is moved to the left or right.", "slug": "understanding_moving_the_decimal", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/converting_fractions_to_decimals_05/", "id": "converting_fractions_to_decimals_0.5", "title": "Rewriting fractions as decimals", "description": "Practice rewriting fractions as decimals. Fractions in these problems have denominators of 10 and 100.", "slug": "converting_fractions_to_decimals_05", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/multiplying_decimals/", "id": "multiplying_decimals", "title": "Multiplying decimals 3", "description": "Practice multiplying two numbers that are written to the tenths, hundredths, or thousandths place.", "slug": "multiplying_decimals", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/division_3/", "id": "division_3", "title": "Division by 2 digits", "description": "Divide 3-digit and 4-digit numbers by a 2-digit number without remainders.", "slug": "division_3", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/division_4/", "id": "division_4", "title": "Multi-digit division", "description": "Practice dividing multi-digit whole numbers. These problems use remainders.", "slug": "division_4", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/dividing_decimals_05/", "id": "dividing_decimals_0.5", "title": "Dividing completely", "description": "Divide two whole numbers to get a quotient with a decimal.", "slug": "dividing_decimals_05", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations/dividing_decimals/", "id": "dividing_decimals", "title": "Dividing decimals 4", "description": "Practice dividing decimal numbers using \"long division\".", "slug": "dividing_decimals", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Here we will explore understanding decimals conceptually, using operations with decimals, rounding and estimating with decimals, and converting decimals. And why not go into the fun concepts of manipulating decimals through addition, subtraction, multiplication and division! It really is a breeze once you are done with these videos!", "node_slug": "on-place-decimal-operations", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations", "extended_slug": "math/on-sixth-grade-math/on-number-sense-numeration/on-place-decimal-operations", "kind": "Topic", "slug": "on-place-decimal-operations"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-factors-multiples/", "id": "on-factors-multiples", "hide": false, "title": "Factors and multiples", "child_data": [{"kind": "Exercise", "id": "3849070"}, {"kind": "Exercise", "id": "702484106"}, {"kind": "Exercise", "id": "4800209"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-factors-multiples/prime_numbers/", "id": "prime_numbers", "title": "Prime numbers", "description": "Identify prime numbers less than 100.", "slug": "prime_numbers", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-factors-multiples/composite_numbers/", "id": "composite_numbers", "title": "Composite numbers", "description": "Identify composite numbers less than 100.", "slug": "composite_numbers", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-factors-multiples/divisibility/", "id": "divisibility", "title": "Divisibility", "slug": "divisibility", "kind": "Exercise"}], "in_knowledge_map": false, "description": "After these videos, understanding the concept of prime numbers and the ones for which you can finding factors and multiples, will be no brainers!", "node_slug": "on-factors-multiples", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-number-sense-numeration/on-factors-multiples", "extended_slug": "math/on-sixth-grade-math/on-number-sense-numeration/on-factors-multiples", "kind": "Topic", "slug": "on-factors-multiples"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-properties-numbers/", "id": "on-properties-numbers", "hide": false, "title": "Properties of numbers", "child_data": [{"kind": "Exercise", "id": "257483380"}, {"kind": "Video", "id": "2600686"}, {"kind": "Video", "id": "2600687"}, {"kind": "Exercise", "id": "2011"}, {"kind": "Exercise", "id": "2019"}, {"kind": "Exercise", "id": "2018"}, {"kind": "Exercise", "id": "x4b33ce9d"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-properties-numbers/distributive_property/", "id": "distributive_property", "title": "Factoring numerical expressions using the distributive property", "description": "Practice applying the distributive property to factor numerical expressions (no variables).", "slug": "distributive_property", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-properties-numbers/commutative-law-of-addition/", "id": "HwSszh3L358", "title": "Commutative law of addition", "kind": "Video", "description": "Commutative Law of Addition", "slug": "commutative-law-of-addition"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-properties-numbers/commutative-law-of-multiplication/", "id": "ENKH97PYssg", "title": "Commutative law of multiplication", "kind": "Video", "description": "Commutative Law of Multiplication", "slug": "commutative-law-of-multiplication"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-properties-numbers/order_of_operations/", "id": "order_of_operations", "title": "Order of operations with negative numbers", "description": "Practice evaluating expressions using the order of operations. Numbers used in these problems may be negative.", "slug": "order_of_operations", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-properties-numbers/least_common_multiple/", "id": "least_common_multiple", "title": "Least common multiple", "description": "Find the lcm (least common multiple) of pairs of integers.", "slug": "least_common_multiple", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-properties-numbers/greatest_common_divisor/", "id": "greatest_common_divisor", "title": "Greatest common factor", "slug": "greatest_common_divisor", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-number-sense-numeration/on-properties-numbers/gcf-and-lcm-word-problems/", "id": "gcf-and-lcm-word-problems", "title": "GCF and LCM word problems", "slug": "gcf-and-lcm-word-problems", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This group of tutorials will introduce us to some of the common properties of numbers, including the least common multiple (LCM), greatest common factor (GCF), and the distributive property. We'll hear really good explanations and practice rewriting expressions so that we can extend our understanding of the properties of numbers and of PEDMAS! All of these will be extremely useful going forward. Really, it's true!", "node_slug": "on-properties-numbers", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-number-sense-numeration/on-properties-numbers", "extended_slug": "math/on-sixth-grade-math/on-number-sense-numeration/on-properties-numbers", "kind": "Topic", "slug": "on-properties-numbers"}], "in_knowledge_map": false, "description": "The most fundamental branch of math is having a clear idea on number sense and numeration. It consists of understanding place values, adding, subtracting, multiplying, and dividing numbers. We're willing to bet that doing these operations on whole numbers is a piece of cake, but now we'll mix those numbers up with decimals and fraction and exciting concepts like ratios and percentages. So sharpen that pencil and relax in your chair, we're going for a ride!", "node_slug": "on-number-sense-numeration", "render_type": "Topic", "topic_page_url": "/math/on-sixth-grade-math/on-number-sense-numeration", "extended_slug": "math/on-sixth-grade-math/on-number-sense-numeration", "kind": "Topic", "slug": "on-number-sense-numeration"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-measurement/", "id": "on-measurement", "hide": false, "title": "Measurement", "child_data": [{"kind": "Topic", "id": "xdba55d6a"}, {"kind": "Topic", "id": "xe7e1dddd"}, {"kind": "Topic", "id": "x9fd02ba5"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-measurement/on-unit-conversion/", "id": "on-unit-conversion", "hide": false, "title": "Unit conversion", "child_data": [{"kind": "Exercise", "id": "x9b384e01"}, {"kind": "Video", "id": "xc6caed89"}, {"kind": "Video", "id": "26"}, {"kind": "Exercise", "id": "xc465f81e"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-measurement/on-unit-conversion/converting-units/", "id": "converting-units", "title": "Converting units (metrics)", "description": "Convert between metric measures of distance, volume, and mass.", "slug": "converting-units", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-unit-conversion/cm-to-meters/", "id": "6bQ6HJsAv4A", "title": "Unit conversion: centimeters to meters", "kind": "Video", "description": "Which are smaller: centimeters or meters? If you know the answer to that question, then solving this problem gets a little easier. Let's convert centimeters to meters.", "slug": "cm-to-meters"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-unit-conversion/converting-gallons-to-quarts-pints-and-cups/", "id": "4uQtJDf7drU", "title": "Unit conversion: gallons to quarts, pints, and cups", "kind": "Video", "description": "What's the difference between gallons, quarts, pints, and cups? Soooo many people go their entire lives without knowing how to convert one unit of measure to another. Take note.", "slug": "converting-gallons-to-quarts-pints-and-cups"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-unit-conversion/converting-measurements-word-problems/", "id": "converting-measurements-word-problems", "title": "Converting units word problems (metric)", "description": "Solve word problems that involve converting between metric measures of distance, volume, and mass, as well as measures of time.", "slug": "converting-measurements-word-problems", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Wait, I'm in Europe and my car only tells my distance traveled in kilometers! But I'm used to a units of distance devised by the Romans to measure the average length of 1000 paces of a soldier (the \"mile\")! How do I operate? These tutorials are about the fundamental skill of unit conversion. Sal's cousin Nadia being a bit confused with this was actually the reason why he started tutoring her (which led to the creation of the Khan Academy).", "node_slug": "on-unit-conversion", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-measurement/on-unit-conversion", "extended_slug": "math/on-sixth-grade-math/on-measurement/on-unit-conversion", "kind": "Topic", "slug": "on-unit-conversion"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-measurement/on-area/", "id": "on-area", "hide": false, "title": "Area", "child_data": [{"kind": "Video", "id": "x29584c60"}, {"kind": "Exercise", "id": "920312137"}, {"kind": "Exercise", "id": "x5df942ac"}, {"kind": "Exercise", "id": "898971113"}, {"kind": "Video", "id": "x74fb422f"}, {"kind": "Exercise", "id": "x7145a29c"}, {"kind": "Exercise", "id": "899013436"}, {"kind": "Exercise", "id": "xfb0c1229"}, {"kind": "Exercise", "id": "xe57344e5"}, {"kind": "Exercise", "id": "xa493d7fe"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-measurement/on-area/understanding-multiplication-through-area-models/", "id": "p0jCw2sqZgs", "title": "Multiplying: understanding by using area models", "kind": "Video", "description": "If you're like us, you're a visual learner. Seeing a multiplication problem visualized using an area model really helps. Check it out!", "slug": "understanding-multiplication-through-area-models"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-area/area_of_triangles_1/", "id": "area_of_triangles_1", "title": "Area of triangles", "description": "Practice finding the area of right, acute, and obtuse triangles from a diagram.", "slug": "area_of_triangles_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-area/area-of-triangles-2/", "id": "area-of-triangles-2", "title": "Areas of shapes on grids", "description": "Practice finding the areas of triangles and quadrilaterals on grids.", "slug": "area-of-triangles-2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-area/area_of_parallelograms/", "id": "area_of_parallelograms", "title": "Area of parallelograms", "description": "Practice finding the area of parallelograms given base and height.", "slug": "area_of_parallelograms", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-area/area-breaking-up-shape/", "id": "loAA3TCNAvU", "title": "Finding area by breaking up the shape", "kind": "Video", "description": "Don't be intimidated by odd looking geometric figures and being asked to find its area. In this example you'll understand that breaking up the figure into smaller geometric shapes that are regular make the task a lot easier.", "slug": "area-breaking-up-shape"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-area/composing-and-decomposing-shapes/", "id": "composing-and-decomposing-shapes", "title": "Area challenge", "description": "Practice solving problems involving triangles, parallelograms, and composite figures. Exercises include decimals, fractions, and word problems. Area of circles is not included.", "slug": "composing-and-decomposing-shapes", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-area/areas_of_trapezoids_rhombi_and_kites/", "id": "areas_of_trapezoids_rhombi_and_kites", "title": "Area of trapezoids", "description": "Practice finding the areas of trapezoids.", "slug": "areas_of_trapezoids_rhombi_and_kites", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-area/area-of-quadrilaterals-and-polygons/", "id": "area-of-quadrilaterals-and-polygons", "title": "Area of composite figures", "description": "Practice finding the areas of complex shapes that are composed of smaller shapes.", "slug": "area-of-quadrilaterals-and-polygons", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-area/nets-of-3d-figures/", "id": "nets-of-3d-figures", "title": "Nets of 3D figures", "description": "Practice matching 2D nets to the 3D shapes the fold up into.", "slug": "nets-of-3d-figures", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-area/surface-areas/", "id": "surface-areas", "title": "Surface area", "description": "Practice finding the surface area of 3D objects.", "slug": "surface-areas", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Area is how we thinking about how much space something takes in two dimensions such as comparing how much land one property takes up versus another. We'll take a conceptual look at how area is actually measured.", "node_slug": "on-area", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-measurement/on-area", "extended_slug": "math/on-sixth-grade-math/on-measurement/on-area", "kind": "Topic", "slug": "on-area"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-measurement/on-volume/", "id": "on-volume", "hide": false, "title": "Volume", "child_data": [{"kind": "Video", "id": "xf932dab5"}, {"kind": "Exercise", "id": "x47cf8468"}, {"kind": "Exercise", "id": "x42be8afc"}, {"kind": "Exercise", "id": "x5c621858"}, {"kind": "Exercise", "id": "x7ac21e11"}, {"kind": "Exercise", "id": "xd94fe24c"}, {"kind": "Video", "id": "60129394"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-measurement/on-volume/measuring-volume-as-area-times-length/", "id": "daCT_24RnIY", "title": "Volume: measuring as area times length", "kind": "Video", "description": "Sometimes, we can't just count the number of cubes to find the volume because there are too many. In those situations, you need another way of measuring volume. This video gives you the solution.", "slug": "measuring-volume-as-area-times-length"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-volume/volume_with_unit_cubes/", "id": "volume_with_unit_cubes", "title": "Volume with unit cubes 1", "description": "Find volume of three-dimensional figures by counting unit cubes.", "slug": "volume_with_unit_cubes", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-volume/volume_1/", "id": "volume_1", "title": "Volume 1", "description": "Find volume of a rectangular prism with labeled sides. \u00a0Find a missing side length on a rectangular prism when given the volume.", "slug": "volume_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-volume/volume_2/", "id": "volume_2", "title": "Volume word problems", "description": "Find volume of rectangular prisms to solve word problems.", "slug": "volume_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-volume/volume_with_fractions/", "id": "volume_with_fractions", "title": "Volume with fractions", "description": "Practice finding the volume of rectangular prisms that have fractional side lengths.", "slug": "volume_with_fractions", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-volume/volume-word-problems-with-fractions/", "id": "volume-word-problems-with-fractions", "title": "Volume word problems with fractions and decimals", "description": "Practice solving volume word problems involving objects like fish tanks, truck beds, and refrigerators.", "slug": "volume-word-problems-with-fractions", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-measurement/on-volume/solid-geometry-volume/", "id": "ZqzAOZ9pP9Q", "title": "Find the volume of a triangular prism and cube", "kind": "Video", "description": "In this tutorial we'll practice finding solid geometry volume. Keep paper and pencil nearby in case you want to remember the formulas.", "slug": "solid-geometry-volume"}], "in_knowledge_map": false, "description": "Volume measures how much 3-dimensional \"space\" an object takes up. We'll see in this tutorial that it is an extension of length (1-D) or area (2-D) to three dimensions!", "node_slug": "on-volume", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-measurement/on-volume", "extended_slug": "math/on-sixth-grade-math/on-measurement/on-volume", "kind": "Topic", "slug": "on-volume"}], "in_knowledge_map": false, "description": "If you think about it, we measure almost everything: time, distance, size, weight, volume, etc. Every THING can be measured. The question is, what unit of measurement is used and how is that unit constructed, compared, and converted? This last part is what we explore in these tutorials.", "node_slug": "on-measurement", "render_type": "Topic", "topic_page_url": "/math/on-sixth-grade-math/on-measurement", "extended_slug": "math/on-sixth-grade-math/on-measurement", "kind": "Topic", "slug": "on-measurement"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/", "id": "on-geometry-spatial-sense", "hide": false, "title": "Geometry and Spatial Sense", "child_data": [{"kind": "Topic", "id": "xe343fc41"}, {"kind": "Topic", "id": "xbfb57e75"}, {"kind": "Topic", "id": "xefca3883"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane/", "id": "on-coordinate-plane", "hide": false, "title": "Coordinate plane", "child_data": [{"kind": "Video", "id": "578962249"}, {"kind": "Video", "id": "23630"}, {"kind": "Video", "id": "396277331"}, {"kind": "Exercise", "id": "2016"}, {"kind": "Exercise", "id": "342773513"}, {"kind": "Exercise", "id": "702001212"}, {"kind": "Exercise", "id": "xcb17d9e9"}, {"kind": "Exercise", "id": "x9f1166e7"}, {"kind": "Exercise", "id": "x1d5815bc"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane/descartes-and-cartesian-coordinates/", "id": "N4nrdf0yYfM", "title": "Introduction to the coordinate plane", "kind": "Video", "description": "Bridging algebra and geometry. What makes linear equations so linear.", "slug": "descartes-and-cartesian-coordinates"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane/the-coordinate-plane/", "id": "VhNkWdLGpmA", "title": "Coordinate plane examples", "kind": "Video", "description": "Let's get familiar with the x/y coordinate plane, both from the perspective of plotting points and interpreting the placement of points on a plane.", "slug": "the-coordinate-plane"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane/plot-ordered-pairs/", "id": "5ctsUsvIp8w", "title": "Coordinate plane: plot ordered pairs", "kind": "Video", "description": "We're plotting an ordered pair on the x (horizontal) axis and y (vertical) axis of the coordinate plane.", "slug": "plot-ordered-pairs"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane/graphing_points/", "id": "graphing_points", "title": "Graphing points", "description": "Plot a given point on the coordinate plane.", "slug": "graphing_points", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane/graphing_points_2/", "id": "graphing_points_2", "title": "Graphing points and naming quadrants", "description": "Practice graphing points and identifying which quadrants they're in.", "slug": "graphing_points_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane/identifying_points_1/", "id": "identifying_points_1", "title": "Points on the coordinate plane", "description": "Practice plotting points using an xy coordinate system. The cooridnates of the points in these problems may be negative.", "slug": "identifying_points_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane/coordinate-plane-word-problems-in-the-first-quadrant/", "id": "coordinate-plane-word-problems-in-the-first-quadrant", "title": "Coordinate plane word problems in the first quadrant", "description": "Find the distance between points, graph points, and interpret data on coordinate planes to solve word problems.", "slug": "coordinate-plane-word-problems-in-the-first-quadrant", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane/coordinate-plane-word-problems/", "id": "coordinate-plane-word-problems", "title": "Coordinate plane problems in all four quadrants", "description": "Practice solving word problems by interpreting the meaning of points plotted on an xy coordinate system.", "slug": "coordinate-plane-word-problems", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane/reflecting-points/", "id": "reflecting-points", "title": "Reflecting points on the coordinate plane", "description": "Practice reflecting points across axes on the xy coordinate plane.", "slug": "reflecting-points", "kind": "Exercise"}], "in_knowledge_map": false, "description": "How can we communicate exactly where something is in two dimensions? Here, we cover the basics of the coordinate plane. We now delve into the world of Euclid. This will be a great tutorial experience if you are just starting to ramp up your understanding of graphing or need some fundamental review.", "node_slug": "on-coordinate-plane", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane", "extended_slug": "math/on-sixth-grade-math/on-geometry-spatial-sense/on-coordinate-plane", "kind": "Topic", "slug": "on-coordinate-plane"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons/", "id": "on-angles-polygons", "hide": false, "title": "Angles and polygons", "child_data": [{"kind": "Exercise", "id": "196064396"}, {"kind": "Exercise", "id": "x6bc79072"}, {"kind": "Exercise", "id": "47757395"}, {"kind": "Exercise", "id": "x3958fbe6"}, {"kind": "Exercise", "id": "x0b7cb620"}, {"kind": "Exercise", "id": "x0dc914cc"}, {"kind": "Exercise", "id": "x6fe7dd73"}, {"kind": "Exercise", "id": "xf0293235"}, {"kind": "Exercise", "id": "xd6d728fb"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons/measuring_angles/", "id": "measuring_angles", "title": "Measuring angles", "description": "Measure angles using a protractor.", "slug": "measuring_angles", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons/drawing-angles/", "id": "drawing-angles", "title": "Drawing angles", "description": "Use a protractor to construct angles.", "slug": "drawing-angles", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons/angle_types/", "id": "angle_types", "title": "Angle types", "description": "Determine if an angle is acute, right, or obtuse. \u00a0A protractor is provided.", "slug": "angle_types", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons/recognizing-angles/", "id": "recognizing-angles", "title": "Recognizing angles", "description": "Determine if angles in shapes and pictures are acute, right, or obtuse.", "slug": "recognizing-angles", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons/drawing-right-acute-and-obtuse-angles/", "id": "drawing-right--acute--and-obtuse-angles", "title": "Drawing right, acute, and obtuse angles", "description": "Create an acute, right, or obtuse angle using a given vertex.", "slug": "drawing-right-acute-and-obtuse-angles", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons/benchmark-angles/", "id": "benchmark-angles", "title": "Benchmark angles", "description": "Estimate the size of angles when given a picture or a situation.", "slug": "benchmark-angles", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons/polygons-in-the-coordinate-plane/", "id": "polygons-in-the-coordinate-plane", "title": "Quadrilateral problems on the coordinate plane", "description": "Challenge problems involving the coordinates of the vertices of the quadrilaterals", "slug": "polygons-in-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons/drawing-polygons/", "id": "drawing-polygons", "title": "Drawing polygons with coordinates", "description": "Practice drawing shapes on the coordinate plane.", "slug": "drawing-polygons", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons/drawing-polygons-2/", "id": "drawing-polygons-2", "title": "Drawing polygons with coordinates 2", "description": "More challenging problems involving drawing shapes on the coordinate plane.", "slug": "drawing-polygons-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "on-angles-polygons", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons", "extended_slug": "math/on-sixth-grade-math/on-geometry-spatial-sense/on-angles-polygons", "kind": "Topic", "slug": "on-angles-polygons"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-transformations/", "id": "on-transformations", "hide": false, "title": "Transformations", "child_data": [{"kind": "Exercise", "id": "310282900"}, {"kind": "Exercise", "id": "x8bd33d7c"}, {"kind": "Exercise", "id": "x73c74d82"}, {"kind": "Exercise", "id": "xc4fb61cc"}, {"kind": "Exercise", "id": "xbdeb6941"}, {"kind": "Exercise", "id": "xcf7c3f5b"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-transformations/axis_of_symmetry/", "id": "axis_of_symmetry", "title": "Axis of symmetry", "description": "Draw and identify lines of symmetry. \u00a0Create and identify symmetrical shapes.", "slug": "axis_of_symmetry", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-transformations/symmetry-of-two-dimensional-shapes/", "id": "symmetry-of-two-dimensional-shapes", "title": "Symmetry of two-dimensional shapes", "description": "Analyze various shapes according to their reflective and rotational symmetries.", "slug": "symmetry-of-two-dimensional-shapes", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-transformations/performing-translations-on-the-coordinate-plane/", "id": "performing-translations-on-the-coordinate-plane", "title": "Perform translations", "description": "Use the interactive transformation tool to perform translations.", "slug": "performing-translations-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-transformations/performing-rotations-on-the-coordinate-plane/", "id": "performing-rotations-on-the-coordinate-plane", "title": "Perform rotations", "description": "Use the interactive transformation tool to perform rotations.", "slug": "performing-rotations-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-transformations/performing-reflections-on-the-coordinate-plane/", "id": "performing-reflections-on-the-coordinate-plane", "title": "Perform reflections", "description": "Use the interactive transformation tool to perform reflections.", "slug": "performing-reflections-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-geometry-spatial-sense/on-transformations/transforming-polygons/", "id": "transforming-polygons", "title": "Transforming polygons", "slug": "transforming-polygons", "kind": "Exercise"}], "in_knowledge_map": false, "description": "It's time to learn about the most useful math concept for creating video game graphics: geometric transformations. We will start with lines of symmetry and the order of rotational symmetry and then move on to reflecting, translating, and/or rotating a shape", "node_slug": "on-transformations", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-geometry-spatial-sense/on-transformations", "extended_slug": "math/on-sixth-grade-math/on-geometry-spatial-sense/on-transformations", "kind": "Topic", "slug": "on-transformations"}], "in_knowledge_map": false, "description": "We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large. Geometry is at the core of everything that exists--including you. Some of the interesting topics we cover in measurements section: triangles, prisms, quadrilaterals etc. are all actually part of geometry too! Having said all that, here we'll delve into angles and coordinate planes and more!", "node_slug": "on-geometry-spatial-sense", "render_type": "Topic", "topic_page_url": "/math/on-sixth-grade-math/on-geometry-spatial-sense", "extended_slug": "math/on-sixth-grade-math/on-geometry-spatial-sense", "kind": "Topic", "slug": "on-geometry-spatial-sense"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-patterning-algebra/", "id": "on-patterning-algebra", "hide": false, "title": "Patterning and Algebra", "child_data": [{"kind": "Topic", "id": "xf3d85fbd"}, {"kind": "Topic", "id": "xe3a9d0f1"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-number-patterns/", "id": "on-number-patterns", "hide": false, "title": "Number patterns", "child_data": [{"kind": "Video", "id": "xee7958b1"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-number-patterns/relationships-between-patterns/", "id": "ayRpoJgph0E", "title": "Number patterns: Seeing relationships", "kind": "Video", "description": "Laying the foundation for algebraic thinking by learning to recognize the relationships between patterns and graphing out those relationships.", "slug": "relationships-between-patterns"}], "in_knowledge_map": false, "description": "One of the fundamentals of algebra is learning to recognize patterns among numbers and being able to visualize those patterns and relationships. So...let's use some mathematical tools to visualize, interpret, and graph patterns involving the coordinate plane.", "node_slug": "on-number-patterns", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-patterning-algebra/on-number-patterns", "extended_slug": "math/on-sixth-grade-math/on-patterning-algebra/on-number-patterns", "kind": "Topic", "slug": "on-number-patterns"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/", "id": "on-variables-expressions", "hide": false, "title": "Variables and expressions", "child_data": [{"kind": "Exercise", "id": "1031282414"}, {"kind": "Video", "id": "1027324864"}, {"kind": "Exercise", "id": "47736350"}, {"kind": "Exercise", "id": "47750479"}, {"kind": "Exercise", "id": "x7ab7710c"}, {"kind": "Exercise", "id": "47765362"}, {"kind": "Exercise", "id": "213307256"}, {"kind": "Exercise", "id": "x6859e543"}, {"kind": "Video", "id": "1254705621"}, {"kind": "Video", "id": "1254690345"}, {"kind": "Exercise", "id": "716798913"}, {"kind": "Exercise", "id": "xc85799e4"}, {"kind": "Exercise", "id": "x148a27a6"}, {"kind": "Exercise", "id": "2012"}, {"kind": "Exercise", "id": "363799134"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/one_step_equation_intuition/", "id": "one_step_equation_intuition", "title": "One-step equation intuition", "description": "Explore why we do the same things to both sides of an equation.", "slug": "one_step_equation_intuition", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/expressions-with-two-variables/", "id": "KdfSUbEFums", "title": "Expressions with two variables", "kind": "Video", "description": "Basics of expression with two variables", "slug": "expressions-with-two-variables"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/writing_expressions_1/", "id": "writing_expressions_1", "title": "Writing expressions with variables", "description": "Practice writing algebraic expressions to match verbal descriptions of mathematical operations.", "slug": "writing_expressions_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/writing_expressions_2/", "id": "writing_expressions_2", "title": "Writing expressions with variables and parentheses", "description": "Practice writing algebraic expressions involving quantities grouped by parentheses.", "slug": "writing_expressions_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/writing-expressions-with-variables-word-problems/", "id": "writing-expressions-with-variables-word-problems", "title": "Writing basic algebraic expressions word problems", "description": "Practice writing basic algebraic expressions to model real-world situations.", "slug": "writing-expressions-with-variables-word-problems", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/evaluating_expressions_1/", "id": "evaluating_expressions_1", "title": "Evaluating expressions with one variable", "description": "Practice plugging in a value for the variable in an equation. These are introductory problems, so the expressions aren't too complicated.", "slug": "evaluating_expressions_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/evaluating_expressions_2/", "id": "evaluating_expressions_2", "title": "Evaluating expressions with two variables", "description": "Practice evaluating expressions in two variables by plugging in values for the variables.", "slug": "evaluating_expressions_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/evaluating-expressions-3/", "id": "evaluating-expressions-3", "title": "Evaluating expressions with variables word problems", "description": "Practice plugging in values to evaluate real-world algebraic expressions. These are introductory problems, so the expressions aren't too complicated.", "slug": "evaluating-expressions-3", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/combining-like-terms-1/", "id": "P6_sK8hRWCA", "title": "How to combine like terms", "kind": "Video", "description": "Another good explanation (minus Chuck Norris) on the how we combine like terms in algebra. This will totally make sense.", "slug": "combining-like-terms-1"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/combining-like-terms-3/", "id": "FNnmseBlvaY", "title": "Combining like terms, but more complicated", "kind": "Video", "description": "This example of combining like terms in an expression get a little hairy. Listen closely.", "slug": "combining-like-terms-3"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/combining_like_terms_1/", "id": "combining_like_terms_1", "title": "Combining like terms with negative coefficients", "description": "Simplify algebraic expressions by combining like terms. Coefficients on some terms are negative.", "slug": "combining_like_terms_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/equivalent-forms-of-expressions-1/", "id": "equivalent-forms-of-expressions-1", "title": "Equivalent expressions with distribution and combining like terms", "description": "Practice determining whether or not two algebraic expressions are equivalent by manipulating the expressions. These problems require you to combine like terms and apply the distributive property.", "slug": "equivalent-forms-of-expressions-1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/equations-in-one-variable-1/", "id": "equations-in-one-variable-1", "title": "Writing one-step equations word problems", "description": "Practice writing basic equations to model real-world situations.", "slug": "equations-in-one-variable-1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/linear_equations_1/", "id": "linear_equations_1", "title": "One-step equations with multiplication and division", "description": "Practice solving equations in one step by multiplying or dividing a value from both sides.", "slug": "linear_equations_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions/one_step_equations/", "id": "one_step_equations", "title": "One-step equations with addition and subtraction", "description": "Practice solving equations in one step by adding or subtracting the same value from both sides.", "slug": "one_step_equations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Wait, why are we using letters in math? How can an 'x' represent a number? What number is it? I must figure this out!!! Yes, you must. This tutorial is great if you're just beginning to delve into the world of algebraic variables and expressions.", "node_slug": "on-variables-expressions", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions", "extended_slug": "math/on-sixth-grade-math/on-patterning-algebra/on-variables-expressions", "kind": "Topic", "slug": "on-variables-expressions"}], "in_knowledge_map": false, "description": "Arithmetic is fun, but algebra is a blast! These tutorials will give you some straightforward explanations and examples to get you started down the road of algebraic thinking. We'll practice writing and evaluating numerical expressions, as well as seeing, interpreting, and graphing patterns and relationships between numbers. We're laying the foundation for lots of good learning ahead!", "node_slug": "on-patterning-algebra", "render_type": "Topic", "topic_page_url": "/math/on-sixth-grade-math/on-patterning-algebra", "extended_slug": "math/on-sixth-grade-math/on-patterning-algebra", "kind": "Topic", "slug": "on-patterning-algebra"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-data-management-probability/", "id": "on-data-management-probability", "hide": false, "title": "Data Management and Probability", "child_data": [{"kind": "Topic", "id": "x60f8e1ca"}, {"kind": "Topic", "id": "x1e380311"}, {"kind": "Topic", "id": "xfaf9ac12"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/", "id": "on-data-management", "hide": false, "title": "Data management", "child_data": [{"kind": "Exercise", "id": "458480641"}, {"kind": "Exercise", "id": "xe7faa189"}, {"kind": "Exercise", "id": "280662526"}, {"kind": "Exercise", "id": "458428444"}, {"kind": "Exercise", "id": "458405550"}, {"kind": "Exercise", "id": "720871331"}, {"kind": "Exercise", "id": "458500039"}, {"kind": "Exercise", "id": "458495355"}, {"kind": "Exercise", "id": "x9def841d"}, {"kind": "Exercise", "id": "x5397b016"}, {"kind": "Exercise", "id": "xcdd538c4"}, {"kind": "Exercise", "id": "520819886"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/creating_box_and_whisker_plots/", "id": "creating_box_and_whisker_plots", "title": "Creating box plots 1", "description": "Practice making box plots to summarize data sets.", "slug": "creating_box_and_whisker_plots", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/analyzing-data-with-box-plots/", "id": "analyzing-data-with-box-plots", "title": "Reading box plots", "description": "Practice reading information presented in box plots.", "slug": "analyzing-data-with-box-plots", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/reading_bar_charts_1/", "id": "reading_bar_charts_1", "title": "Reading bar charts 1", "description": "Read and interpret a bar graph.", "slug": "reading_bar_charts_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/creating_bar_charts_1/", "id": "creating_bar_charts_1", "title": "Creating bar charts", "description": "Create a bar graph with the data given.", "slug": "creating_bar_charts_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/reading_bar_charts_2/", "id": "reading_bar_charts_2", "title": "Reading bar charts 2", "description": "Read and interpret a double bar graphs.", "slug": "reading_bar_charts_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/reading_bar_charts_3/", "id": "reading_bar_charts_3", "title": "Reading bar charts 3", "slug": "reading_bar_charts_3", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/reading_pictographs_1/", "id": "reading_pictographs_1", "title": "Reading pictographs 1", "description": "Read picture graphs to answer questions about a context.", "slug": "reading_pictographs_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/reading_pictographs_2/", "id": "reading_pictographs_2", "title": "Reading pictographs 2", "description": "Interpret picture graphs to answer questions about a context.", "slug": "reading_pictographs_2", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/analyzing-with-dot-plots/", "id": "analyzing-with-dot-plots", "title": "Reading dot plots and frequency tables", "description": "Practice reading basic dot plots and frequency tables.", "slug": "analyzing-with-dot-plots", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/creating-dot-plots/", "id": "creating-dot-plots", "title": "Creating dot plots", "description": "Practice creating dot plots. Dot plots are very similar to frequency tables, but they make it easier to\u00a0see\u00a0the data.", "slug": "creating-dot-plots", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/interpreting-line-plots-with-fraction-multiplication-and-division/", "id": "interpreting-line-plots-with-fraction-multiplication-and-division", "title": "Interpreting dot plots with fraction operations", "description": "Interpret fraction data on dot plots to solve word problems.", "slug": "interpreting-line-plots-with-fraction-multiplication-and-division", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-data-management/reading_stem_and_leaf_plots/", "id": "reading_stem_and_leaf_plots", "title": "Reading stem and leaf plots", "slug": "reading_stem_and_leaf_plots", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial is less about statistics and more about interpreting data. Whether you're looking at scientific data or stock price: a table, pictograph, bar graph or line graph, box-and-whisker plots can show up in your life. This tutorial covers what they are, how to read them and how to construct them.", "node_slug": "on-data-management", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-data-management-probability/on-data-management", "extended_slug": "math/on-sixth-grade-math/on-data-management-probability/on-data-management", "kind": "Topic", "slug": "on-data-management"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-statistics/", "id": "on-statistics", "hide": false, "title": "Statistics", "child_data": [{"kind": "Exercise", "id": "x0ad1a4ef"}, {"kind": "Exercise", "id": "5252991"}, {"kind": "Exercise", "id": "366693151"}, {"kind": "Video", "id": "380854779"}, {"kind": "Video", "id": "x9cff9877"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-statistics/statistical-questions/", "id": "statistical-questions", "title": "Statistical questions", "description": "Practice spotting the difference between statistical and non-statistical questions.", "slug": "statistical-questions", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-statistics/mean_median_and_mode/", "id": "mean_median_and_mode", "title": "Mean, median, and mode", "slug": "mean_median_and_mode", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-statistics/exploring_mean_and_median/", "id": "exploring_mean_and_median", "title": "Exploring mean and median", "description": "Practice manipulating the \"shape\" of data, and observe the impact on mean and median.", "slug": "exploring_mean_and_median", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-statistics/mean-median-and-mode/", "id": "k3aKKasOmIw", "title": "Finding mean, median, and mode", "kind": "Video", "description": "Here we give you a set of numbers and then ask you to find the mean, median, and mode. It's your first opportunity to practice with us!", "slug": "mean-median-and-mode"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-statistics/using-mean-to-find-missing-value/", "id": "qpbaglogObM", "title": "How to find a missing value given the mean", "kind": "Video", "description": "Learn how to find the value of a missing piece of data if you know the mean of the data set.", "slug": "using-mean-to-find-missing-value"}], "in_knowledge_map": false, "description": "This is the foundational tutorial for the rest of statistics. Mean, median and mode are measures of \"central tendency.\" That is, they help us find the center (or middle) of the data.", "node_slug": "on-statistics", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-data-management-probability/on-statistics", "extended_slug": "math/on-sixth-grade-math/on-data-management-probability/on-statistics", "kind": "Topic", "slug": "on-statistics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-probability/", "id": "on-probability", "hide": false, "title": "Probability", "child_data": [{"kind": "Video", "id": "185786265"}, {"kind": "Exercise", "id": "x6e17e818"}, {"kind": "Exercise", "id": "1337007129"}, {"kind": "Exercise", "id": "13179429"}, {"kind": "Exercise", "id": "xfe118dde"}, {"kind": "Exercise", "id": "x718b4591"}], "children": [{"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-probability/basic-probability/", "id": "uzkc-qNVoOk", "title": "Probability explained", "kind": "Video", "description": "We give you an introduction to probability through the example of flipping a quarter and rolling a die.", "slug": "basic-probability"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-probability/understanding-probability/", "id": "understanding-probability", "title": "Comparing probabilities", "description": "Practice expressing probabilities in different forms (fractions, decimals, and percents).", "slug": "understanding-probability", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-probability/dice_probability/", "id": "dice_probability", "title": "Probability of rolling dice", "description": "Practice calculating probabilities in dice rolling scenarios.", "slug": "dice_probability", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-probability/probability_1/", "id": "probability_1", "title": "Simple probability", "description": "Practice finding probabilities of events, such as rolling dice, drawing marbles out of a bag, and spinning spinners.", "slug": "probability_1", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-probability/finding-probability/", "id": "finding-probability", "title": "Experimental probability", "description": "Practice making reasonable estimates of the likelihood of future events based on past experience.", "slug": "finding-probability", "kind": "Exercise"}, {"path": "khan/math/on-sixth-grade-math/on-data-management-probability/on-probability/probability-models/", "id": "probability-models", "title": "Probability models", "description": "Practice creating probability models and understand what makes a valid probability model.", "slug": "probability-models", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Flip a quarter a hundred times. What's the probability that it will turn up heads? Tails? Explores probability models, sample spaces, predict the frequency of an outcome of a simple probability experiment or game and a whole lot more.", "node_slug": "on-probability", "render_type": "Tutorial", "topic_page_url": "/math/on-sixth-grade-math/on-data-management-probability/on-probability", "extended_slug": "math/on-sixth-grade-math/on-data-management-probability/on-probability", "kind": "Topic", "slug": "on-probability"}], "in_knowledge_map": false, "description": "We dare you to go through a day in which you never consider or use probability or statistics. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. We are constantly looking at data and charts to understand a multitude of information out there....so here you go! All made simple for you!", "node_slug": "on-data-management-probability", "render_type": "Topic", "topic_page_url": "/math/on-sixth-grade-math/on-data-management-probability", "extended_slug": "math/on-sixth-grade-math/on-data-management-probability", "kind": "Topic", "slug": "on-data-management-probability"}], "in_knowledge_map": false, "description": "By the 6th grade, you're becoming a sophisticated mathemagician. \nYou'll be able to add, subtract, multiply, and divide any non-negative numbers (including decimals and fractions) that any grumpy ogre throws at you. Mind-blowing ideas like ratios, percents, negative numbers, and variable expressions will start being in your comfort zone. Most importantly, the algebraic side of mathematics is a whole new kind of fun! \n\nAnd if that is not enough, we are going to continue with our understanding of ideas like the coordinate plane and area while beginning to derive meaning from data!", "node_slug": "on-sixth-grade-math", "render_type": "Subject", "topic_page_url": "/math/on-sixth-grade-math", "extended_slug": "math/on-sixth-grade-math", "kind": "Topic", "slug": "on-sixth-grade-math"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/", "id": "al-sixth-grade-math", "hide": false, "title": "6th grade (WNCP)", "child_data": [{"kind": "Topic", "id": "x44bc568c"}, {"kind": "Topic", "id": "xd75f4436"}, {"kind": "Topic", "id": "xf6d9ab62"}, {"kind": "Topic", "id": "x07767340"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-number/", "id": "al-number", "hide": false, "title": "Number", "child_data": [{"kind": "Topic", "id": "x5104ac25"}, {"kind": "Topic", "id": "x2d312fed"}, {"kind": "Topic", "id": "x6d79bc17"}, {"kind": "Topic", "id": "x02059f3a"}, {"kind": "Topic", "id": "x7d8ac3ad"}, {"kind": "Topic", "id": "x65629fad"}, {"kind": "Topic", "id": "x7b436005"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/", "id": "place-value-and-decimals", "hide": false, "title": "Place value and decimals", "child_data": [{"kind": "Video", "id": "xd5b498ba"}, {"kind": "Video", "id": "x40b497d9"}, {"kind": "Exercise", "id": "x7adb0385"}, {"kind": "Exercise", "id": "xf8942d6c"}, {"kind": "Exercise", "id": "418343167"}, {"kind": "Exercise", "id": "xec809b3d"}, {"kind": "Exercise", "id": "x1f3cdba0"}, {"kind": "Exercise", "id": "xddf6d40a"}, {"kind": "Exercise", "id": "x74ce5d71"}, {"kind": "Exercise", "id": "66754977"}, {"kind": "Exercise", "id": "xae033bc0"}, {"kind": "Exercise", "id": "460969021"}, {"kind": "Exercise", "id": "460994266"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/regrouping-numbers-intro-various-place-values/", "id": "a_mzIWvHx_Y", "title": "Regrouping numbers intro various place values", "kind": "Video", "description": "Thinking about numbers as expressions of different place values is really helpful. In this example we'll look at regrouping a number by different place values.", "slug": "regrouping-numbers-intro-various-place-values"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/comparing-whole-number-place-values/", "id": "3Xcae0OGavk", "title": "Comparing whole number place values", "kind": "Video", "description": "Which number is bigger? Which number is smaller? Are they equal? Use your knowledge of place value to find the answer.", "slug": "comparing-whole-number-place-values"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/writing-and-interpreting-decimals/", "id": "writing-and-interpreting-decimals", "title": "Decimals in expanded form", "description": "Practice converting decimals between standard form and expanded form.", "slug": "writing-and-interpreting-decimals", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/comparing-decimal-place-value/", "id": "comparing-decimal-place-value", "title": "Comparing decimal place value", "description": "Compare two numbers to thousandths based on meanings of the digits in each place.", "slug": "comparing-decimal-place-value", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/understanding_decimals_place_value/", "id": "understanding_decimals_place_value", "title": "Money and decimal place value intuition", "description": "Select how many hundreds, tens, ones, tenths, hundredths, and thousandths make up a number.", "slug": "understanding_decimals_place_value", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/regrouping-whole-numbers/", "id": "regrouping-whole-numbers", "title": "Regrouping whole numbers", "description": "Regroup numbers in each place value (e.g., regroup 1 ten as 10 ones) to express whole numbers in different ways.", "slug": "regrouping-whole-numbers", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/regrouping-decimals/", "id": "regrouping-decimals", "title": "Regrouping decimals", "description": "Regroup numbers in each place value (e.g., regroup 1 ten as 10 ones) to express decimals in different ways.", "slug": "regrouping-decimals", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/comparing_decimals_2/", "id": "comparing_decimals_2", "title": "Comparing decimals (tenths, hundredths, and thousandths)", "description": "Compare two decimals with digits up to the thousandths using >, <, and = symbols.", "slug": "comparing_decimals_2", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/ordering_decimals/", "id": "ordering_decimals", "title": "Ordering decimals", "description": "Order 5 decimals with digits up to the thousandths from least to greatest.", "slug": "ordering_decimals", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/rounding_numbers/", "id": "rounding_numbers", "title": "Rounding decimals", "description": "Round decimals and whole numbers to the nearest thousand, hundred, ten, one, tenth, or hundredth.", "slug": "rounding_numbers", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/rounding-decimals/", "id": "rounding-decimals", "title": "Rounding decimals 2", "description": "Round decimals using number lines. \u00a0Select numbers that round to a given value.", "slug": "rounding-decimals", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/decimals_on_the_number_line_1/", "id": "decimals_on_the_number_line_1", "title": "Decimals on the number line 1", "description": "Practice finding decimal numbers on the number line. Decimals are limited to tenths in these problems.", "slug": "decimals_on_the_number_line_1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/place-value-and-decimals/decimals_on_the_number_line_2/", "id": "decimals_on_the_number_line_2", "title": "Decimals on the number line 2", "description": "Practice finding decimal numbers on the number line. Decimals are limited to hundredths in these problems.", "slug": "decimals_on_the_number_line_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Here we will explore understanding decimals conceptually, using operations with decimals, rounding and estimating with decimals, and converting decimals. And why not go into the fun concepts of manipulating decimals through addition, subtraction, multiplication and division! It really is a breeze once you are done with these videos!", "node_slug": "place-value-and-decimals", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-number/place-value-and-decimals", "extended_slug": "math/al-sixth-grade-math/al-number/place-value-and-decimals", "kind": "Topic", "slug": "place-value-and-decimals"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/al-sixth-grade-math/al-number/al-prime-numbers-factors/", "id": "al-prime-numbers-factors", "hide": false, "title": "Prime numbers, factors and multiples", "child_data": [{"kind": "Exercise", "id": "x84edaea8"}, {"kind": "Exercise", "id": "xe84a4d8f"}, {"kind": "Exercise", "id": "805202785"}, {"kind": "Exercise", "id": "3849070"}, {"kind": "Exercise", "id": "702484106"}, {"kind": "Exercise", "id": "4166558"}, {"kind": "Exercise", "id": "4800209"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-number/al-prime-numbers-factors/identifying-factors-and-multiples/", "id": "identifying-factors-and-multiples", "title": "Identifying factors and multiples", "description": "Demonstrate understanding of factors and multiples.", "slug": "identifying-factors-and-multiples", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-prime-numbers-factors/factor-pairs/", "id": "factor-pairs", "title": "Factor pairs", "description": "Practice finding factor pairs for whole numbers.", "slug": "factor-pairs", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-prime-numbers-factors/divisibility_intuition/", "id": "divisibility_intuition", "title": "Divisibility intuition", "description": "Identify all positive factors of a one or two-digit number.", "slug": "divisibility_intuition", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-prime-numbers-factors/prime_numbers/", "id": "prime_numbers", "title": "Prime numbers", "description": "Identify prime numbers less than 100.", "slug": "prime_numbers", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-prime-numbers-factors/composite_numbers/", "id": "composite_numbers", "title": "Composite numbers", "description": "Identify composite numbers less than 100.", "slug": "composite_numbers", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-prime-numbers-factors/prime_factorization/", "id": "prime_factorization", "title": "Prime factorization", "slug": "prime_factorization", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-prime-numbers-factors/divisibility/", "id": "divisibility", "title": "Divisibility", "slug": "divisibility", "kind": "Exercise"}], "in_knowledge_map": false, "description": "After these videos, understanding the concept of prime numbers and the ones for which you can finding factors and multiples, will be no brainers!", "node_slug": "al-prime-numbers-factors", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-number/al-prime-numbers-factors", "extended_slug": "math/al-sixth-grade-math/al-number/al-prime-numbers-factors", "kind": "Topic", "slug": "al-prime-numbers-factors"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/al-sixth-grade-math/al-number/al-mixed-numbers-improper-fractions/", "id": "al-mixed-numbers-improper-fractions", "hide": false, "title": "Mixed numbers and improper fractions", "child_data": [{"kind": "Exercise", "id": "213328056"}, {"kind": "Exercise", "id": "460972000"}, {"kind": "Exercise", "id": "497964681"}, {"kind": "Exercise", "id": "324869626"}, {"kind": "Exercise", "id": "460969351"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-number/al-mixed-numbers-improper-fractions/converting_mixed_numbers_and_improper_fractions/", "id": "converting_mixed_numbers_and_improper_fractions", "title": "Converting mixed numbers and improper fractions", "description": "Practice writing a fraction as a mixed number and vice versa.", "slug": "converting_mixed_numbers_and_improper_fractions", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-mixed-numbers-improper-fractions/fractions_on_the_number_line_2/", "id": "fractions_on_the_number_line_2", "title": "Unit fractions on the number line", "description": "Use unit fractions to think about the location of other fractions on the number line.", "slug": "fractions_on_the_number_line_2", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-mixed-numbers-improper-fractions/comparing_improper_fractions_and_mixed_numbers/", "id": "comparing_improper_fractions_and_mixed_numbers", "title": "Comparing fractions and mixed numbers", "description": "Practice comparing fractions and mixed numbers that have\u00a0unlike denominators.", "slug": "comparing_improper_fractions_and_mixed_numbers", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-mixed-numbers-improper-fractions/fractions_cut_and_copy_2/", "id": "fractions_cut_and_copy_2", "title": "Fractions cut and copy 2", "slug": "fractions_cut_and_copy_2", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-mixed-numbers-improper-fractions/fractions_on_the_number_line_3/", "id": "fractions_on_the_number_line_3", "title": "Rational numbers on the number line", "description": "Practice placing positive and negative fractions and decimals on the number line.", "slug": "fractions_on_the_number_line_3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's help you relate improper fractions to mixed numbers!", "node_slug": "al-mixed-numbers-improper-fractions", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-number/al-mixed-numbers-improper-fractions", "extended_slug": "math/al-sixth-grade-math/al-number/al-mixed-numbers-improper-fractions", "kind": "Topic", "slug": "al-mixed-numbers-improper-fractions"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/al-sixth-grade-math/al-number/al-ratios-percentages/", "id": "al-ratios-percentages", "hide": false, "title": "Ratios and percentages", "child_data": [{"kind": "Exercise", "id": "xf6980739"}, {"kind": "Exercise", "id": "201415654"}, {"kind": "Exercise", "id": "x1face01c"}, {"kind": "Exercise", "id": "xc4532d76"}, {"kind": "Exercise", "id": "3012"}, {"kind": "Exercise", "id": "594289413"}, {"kind": "Exercise", "id": "720778814"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-number/al-ratios-percentages/representing-ratios/", "id": "representing-ratios", "title": "Basic ratios", "description": "Practice writing ratios.", "slug": "representing-ratios", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-ratios-percentages/ratio_word_problems/", "id": "ratio_word_problems", "title": "Ratio word problems", "description": "Practice solving basic ratio word problems.", "slug": "ratio_word_problems", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-ratios-percentages/solving-ratio-problems-with-tables/", "id": "solving-ratio-problems-with-tables", "title": "Ratio tables", "description": "Practice filling out tables of equivalent ratios.", "slug": "solving-ratio-problems-with-tables", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-ratios-percentages/finding_percents/", "id": "finding_percents", "title": "Finding percents", "description": "Find a percent of a quantity as a rate per 100; solve problems involving finding the whole, given a part and the percent.", "slug": "finding_percents", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-ratios-percentages/percentage_word_problems_1/", "id": "percentage_word_problems_1", "title": "Percent word problems", "description": "Practice solving word problems involving percents.", "slug": "percentage_word_problems_1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-ratios-percentages/discount_tax_and_tip_word_problems/", "id": "discount_tax_and_tip_word_problems", "title": "Discount, tax, and tip word problems", "description": "Practice solving word problems involving price discounts, taxes, and tip calculations.", "slug": "discount_tax_and_tip_word_problems", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-ratios-percentages/markup_and_commission_word_problems/", "id": "markup_and_commission_word_problems", "title": "Markup and commission word problems", "description": "Practice solving word problems involving price markups and commission fees.", "slug": "markup_and_commission_word_problems", "kind": "Exercise"}], "in_knowledge_map": false, "description": "A common application of numbers in real life (what is REAL life anyway, huh?) is through ratios, rates, and percentages. Whether following a recipe, changing the oil in a car, or determining the percentage earned on a test...these are skills you will use over and over. Ratios are simply another way to express fractions. Rates combine units of measurements to help us understand their relationship better. Percentages, like ratios, give us another way to express fractions and decimals. We'll explain each to you and then practice until you've mastered each concept.", "node_slug": "al-ratios-percentages", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-number/al-ratios-percentages", "extended_slug": "math/al-sixth-grade-math/al-number/al-ratios-percentages", "kind": "Topic", "slug": "al-ratios-percentages"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/al-sixth-grade-math/al-number/al-integers-negative-numbers/", "id": "al-integers-negative-numbers", "hide": false, "title": "Integers Negative numbers", "child_data": [{"kind": "Exercise", "id": "265365034"}, {"kind": "Exercise", "id": "357396312"}, {"kind": "Exercise", "id": "205304798"}, {"kind": "Exercise", "id": "xf9bcac7c"}, {"kind": "Exercise", "id": "261977487"}, {"kind": "Exercise", "id": "213214088"}, {"kind": "Exercise", "id": "x1f769ced"}, {"kind": "Exercise", "id": "xb5482205"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-number/al-integers-negative-numbers/number_line_2/", "id": "number_line_2", "title": "Negative numbers on the number line", "description": "Identify positive and negative integers on the number line.", "slug": "number_line_2", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-integers-negative-numbers/number_line_3/", "id": "number_line_3", "title": "Negative numbers on the number line without reference to zero", "description": "Practice more challenging problems where you identify positive and negative integers on a number line that doesn't have zero labeled.", "slug": "number_line_3", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-integers-negative-numbers/ordering_negative_numbers/", "id": "ordering_negative_numbers", "title": "Ordering negative numbers", "description": "Practice putting integers in order.", "slug": "ordering_negative_numbers", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-integers-negative-numbers/number-opposites/", "id": "number-opposites", "title": "Number opposites", "description": "Practice finding the opposites of numbers. Numbers are opposites when they're on opposite sides of the number line the same distance from zero.", "slug": "number-opposites", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-integers-negative-numbers/negative_number_word_problems/", "id": "negative_number_word_problems", "title": "Interpreting negative numbers", "description": "Practice explaining the meaning of negative numbers in different scenarios.", "slug": "negative_number_word_problems", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-integers-negative-numbers/inequalities_on_a_number_line/", "id": "inequalities_on_a_number_line", "title": "Inequalities on a number line", "description": "Practice writing equations of inequalities graphed on number lines. Identify number line graphs of inequalities.", "slug": "inequalities_on_a_number_line", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-integers-negative-numbers/understanding-inequalities-and-the-number-line/", "id": "understanding-inequalities-and-the-number-line", "title": "Comparing positive and negative numbers on the number line", "description": "Practice comparing positive and negative numbers by thinking about their positions on the number line. Numbers to the right are greater than numbers to the left.", "slug": "understanding-inequalities-and-the-number-line", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-integers-negative-numbers/writing-numerical-inequalities/", "id": "writing-numerical-inequalities", "title": "Writing numerical inequalities", "description": "Practice writing inequalities to describe real-world situations.", "slug": "writing-numerical-inequalities", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Inetegers can be positive or negative whole numbers. Did you notice any use of negative integers in our day-to-day life? You are right! Canadian winter temperatures, of course! Let's get a visual understanding of positive and negative integers", "node_slug": "al-integers-negative-numbers", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-number/al-integers-negative-numbers", "extended_slug": "math/al-sixth-grade-math/al-number/al-integers-negative-numbers", "kind": "Topic", "slug": "al-integers-negative-numbers"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/", "id": "al-multiplication-division", "hide": false, "title": "Multiplication and division", "child_data": [{"kind": "Video", "id": "153770145"}, {"kind": "Video", "id": "x634fb6a8"}, {"kind": "Exercise", "id": "x073cc944"}, {"kind": "Exercise", "id": "x6f0c6901"}, {"kind": "Exercise", "id": "520461717"}, {"kind": "Video", "id": "1816"}, {"kind": "Exercise", "id": "x08d6aacb"}, {"kind": "Exercise", "id": "xa299dc79"}, {"kind": "Exercise", "id": "642900605"}, {"kind": "Exercise", "id": "292987819"}, {"kind": "Exercise", "id": "293008404"}, {"kind": "Exercise", "id": "x04cea837"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/multiplying-a-decimal-by-a-power-of-10/", "id": "mV0RxDZG05A", "title": "Multiplying a decimal by a power of 10", "kind": "Video", "description": "You will notice in this word problem that moving the decimal to the right the same number of times as the number of zeros you multiplying by gets you the answer you desire. Check this out!", "slug": "multiplying-a-decimal-by-a-power-of-10"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/intro-to-multiplying-decimals/", "id": "STyoP3rCmb0", "title": "Introduction to multiplying decimals", "kind": "Video", "description": "Multiplying decimals can be confusing because there's always the question as to where the decimals goes in the answer. We're about to show you so you'll never have to question it again!", "slug": "intro-to-multiplying-decimals"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/multiplying_decimals_05/", "id": "multiplying_decimals_0.5", "title": "Multiplying decimals 1", "description": "Multiply a whole number times a decimal written to the tenths or hundredths place.", "slug": "multiplying_decimals_05", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/multiplying_decimals_1/", "id": "multiplying_decimals_1", "title": "Multiplying decimals 2", "description": "Multiply two numbers. \u00a0Factors are written to the ones, tenths, or hundredths place.", "slug": "multiplying_decimals_1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/understanding_moving_the_decimal/", "id": "understanding_moving_the_decimal", "title": "Understanding moving the decimal", "description": "Give the number of tens a number is being multiplied or divided by when the decimal is moved to the left or right.", "slug": "understanding_moving_the_decimal", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/dividing-decimals-2-1/", "id": "HLGCq2h4ihY", "title": "Dividing a decimal by a power of 10: shortcut", "kind": "Video", "description": "Holy cow! A shortcut? Yep. For each ten you multiply or divide by, just shift that decimal to the right or left. Watch this and be amazed.", "slug": "dividing-decimals-2-1"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/multiplying-and-dividing-decimals-by-powers-of-10/", "id": "multiplying-and-dividing-decimals-by-powers-of-10", "title": "DEPRECATED Multiplying and dividing decimals by powers of 10", "description": "Multiply and dividing decimals by powers of 10.", "slug": "multiplying-and-dividing-decimals-by-powers-of-10", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/converting_fractions_to_decimals_05/", "id": "converting_fractions_to_decimals_0.5", "title": "Rewriting fractions as decimals", "description": "Practice rewriting fractions as decimals. Fractions in these problems have denominators of 10 and 100.", "slug": "converting_fractions_to_decimals_05", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/dividing_decimals_05/", "id": "dividing_decimals_0.5", "title": "Dividing completely", "description": "Divide two whole numbers to get a quotient with a decimal.", "slug": "dividing_decimals_05", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/dividing_decimals_1/", "id": "dividing_decimals_1", "title": "Dividing decimals 1", "description": "Divide a whole number by a number written to the tenths or hundredths place. \u00a0Quotients are whole numbers.", "slug": "dividing_decimals_1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/dividing_decimals_2/", "id": "dividing_decimals_2", "title": "Dividing decimals 2", "description": "Divide a whole number by a number written to the tenths or hundredths place. \u00a0Quotients may include decimals.", "slug": "dividing_decimals_2", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-multiplication-division/dividing_decimals_3/", "id": "dividing_decimals_3", "title": "Dividing decimals 3", "description": "Divide two numbers. \u00a0Divisors, dividends, and quotients can include decimals written to the tenths or hundredths place.", "slug": "dividing_decimals_3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Let's handle slightly more complicated multiplications and divisions. Now you'll become super good at it with a bit more practice! After these tutorials, you'll be comfortable dividing two digit whole numbers and decimals, whether they are in the divisor or dividend position. Pretty exciting, huh? Let me a hear a \"Yes!\"", "node_slug": "al-multiplication-division", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-number/al-multiplication-division", "extended_slug": "math/al-sixth-grade-math/al-number/al-multiplication-division", "kind": "Topic", "slug": "al-multiplication-division"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-number/al-properties-numbers-orders/", "id": "al-properties-numbers-orders", "hide": false, "title": "Properties of Numbers and Order of Operations", "child_data": [{"kind": "Exercise", "id": "2011"}, {"kind": "Exercise", "id": "257483380"}, {"kind": "Video", "id": "2600686"}, {"kind": "Video", "id": "2600687"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-number/al-properties-numbers-orders/order_of_operations/", "id": "order_of_operations", "title": "Order of operations with negative numbers", "description": "Practice evaluating expressions using the order of operations. Numbers used in these problems may be negative.", "slug": "order_of_operations", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-properties-numbers-orders/distributive_property/", "id": "distributive_property", "title": "Factoring numerical expressions using the distributive property", "description": "Practice applying the distributive property to factor numerical expressions (no variables).", "slug": "distributive_property", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-properties-numbers-orders/commutative-law-of-addition/", "id": "HwSszh3L358", "title": "Commutative law of addition", "kind": "Video", "description": "Commutative Law of Addition", "slug": "commutative-law-of-addition"}, {"path": "khan/math/al-sixth-grade-math/al-number/al-properties-numbers-orders/commutative-law-of-multiplication/", "id": "ENKH97PYssg", "title": "Commutative law of multiplication", "kind": "Video", "description": "Commutative Law of Multiplication", "slug": "commutative-law-of-multiplication"}], "in_knowledge_map": false, "description": "We'll hear really good explanations and practice rewriting expressions so that we can extend our understanding of the properties of numbers and of PEDMAS!", "node_slug": "al-properties-numbers-orders", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-number/al-properties-numbers-orders", "extended_slug": "math/al-sixth-grade-math/al-number/al-properties-numbers-orders", "kind": "Topic", "slug": "al-properties-numbers-orders"}], "in_knowledge_map": false, "description": "The most fundamental branch of math is having a clear idea on number sense and numeration. It consists of understanding place values, adding, subtracting, multiplying, and dividing numbers. We're willing to bet that doing these operations on whole numbers is a piece of cake, but now we'll mix those numbers up with decimals and fraction and exciting concepts like ratios and percentages. So sharpen that pencil and relax in your chair, we're going for a ride!", "node_slug": "al-number", "render_type": "Topic", "topic_page_url": "/math/al-sixth-grade-math/al-number", "extended_slug": "math/al-sixth-grade-math/al-number", "kind": "Topic", "slug": "al-number"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-patterns-relations/", "id": "al-patterns-relations", "hide": false, "title": "Patterns and Relations", "child_data": [{"kind": "Topic", "id": "xb5fc3bbf"}, {"kind": "Topic", "id": "x764af4c9"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns/", "id": "in-number-patterns", "hide": false, "title": "Number patterns", "child_data": [{"kind": "Video", "id": "x429c2c78"}, {"kind": "Video", "id": "xe158b503"}, {"kind": "Exercise", "id": "x64dd96ad"}, {"kind": "Video", "id": "x81be10de"}, {"kind": "Video", "id": "x2d028899"}, {"kind": "Exercise", "id": "xa734b67f"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns/figuring-out-days-of-the-week/", "id": "S7CLLRHe8ik", "title": "Using factors and multiples to figure out days of the week", "kind": "Video", "description": "Can you help us think of a mathematical way to determine what day of the week a certain number day falls on? You may say no....but wait! Watch this.", "slug": "figuring-out-days-of-the-week"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns/math-patterns-example-2/", "id": "mFftY8Y_pyY", "title": "Math patterns example 2", "kind": "Video", "description": "We continue to strengthen our skill in identifying patterns. This time we'll use a table to track the pattern.", "slug": "math-patterns-example-2"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns/math-patterns/", "id": "math-patterns", "title": "Math patterns 2", "description": "Generate terms in a pattern when given a rule. \u00a0Identify features of a pattern that are not explicit to the rule itself.", "slug": "math-patterns", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns/interpreting-and-graphing-relationships-between-patterns/", "id": "Muba9-W2FOQ", "title": "Number patterns:: interpreting and graphing relationships", "kind": "Video", "description": "We're building in complexity as we interpret and graph the relationships between patterns in the given ordered pairs. Don't stress. We're here to help!", "slug": "interpreting-and-graphing-relationships-between-patterns"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns/sequence-relationship-example/", "id": "mqsIJucBn6c", "title": "Number patterns: visualizing sequence relationships", "kind": "Video", "description": "Now we're visually plotting ordered pairs based on sequence relationships. The sequence is based on given rules. You're good at following rules, right? Of course you are!", "slug": "sequence-relationship-example"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns/visualizing-and-interpreting-relationships-between-patterns/", "id": "visualizing-and-interpreting-relationships-between-patterns", "title": "Visualizing and interpreting relationships between patterns", "description": "Generate patterns using given rules. Identify relationships between terms. Graph ordered pairs consisting of corresponding terms from the patterns.", "slug": "visualizing-and-interpreting-relationships-between-patterns", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The tutotrials show how to generate terms in a pattern when given a rule and to identify features of a pattern that are not explicit to the rule itself.", "node_slug": "in-number-patterns", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-patterns-relations/in-number-patterns", "extended_slug": "math/al-sixth-grade-math/al-patterns-relations/in-number-patterns", "kind": "Topic", "slug": "in-number-patterns"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/", "id": "in-variables-and-equations", "hide": false, "title": "Variables and equations", "child_data": [{"kind": "Exercise", "id": "1031282414"}, {"kind": "Video", "id": "1027324864"}, {"kind": "Exercise", "id": "47736350"}, {"kind": "Exercise", "id": "47750479"}, {"kind": "Exercise", "id": "x7ab7710c"}, {"kind": "Exercise", "id": "47765362"}, {"kind": "Exercise", "id": "213307256"}, {"kind": "Exercise", "id": "x6859e543"}, {"kind": "Video", "id": "1254705621"}, {"kind": "Video", "id": "1254690345"}, {"kind": "Exercise", "id": "716798913"}, {"kind": "Exercise", "id": "xc85799e4"}, {"kind": "Exercise", "id": "x148a27a6"}, {"kind": "Exercise", "id": "2012"}, {"kind": "Exercise", "id": "363799134"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/one_step_equation_intuition/", "id": "one_step_equation_intuition", "title": "One-step equation intuition", "description": "Explore why we do the same things to both sides of an equation.", "slug": "one_step_equation_intuition", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/expressions-with-two-variables/", "id": "KdfSUbEFums", "title": "Expressions with two variables", "kind": "Video", "description": "Basics of expression with two variables", "slug": "expressions-with-two-variables"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/writing_expressions_1/", "id": "writing_expressions_1", "title": "Writing expressions with variables", "description": "Practice writing algebraic expressions to match verbal descriptions of mathematical operations.", "slug": "writing_expressions_1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/writing_expressions_2/", "id": "writing_expressions_2", "title": "Writing expressions with variables and parentheses", "description": "Practice writing algebraic expressions involving quantities grouped by parentheses.", "slug": "writing_expressions_2", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/writing-expressions-with-variables-word-problems/", "id": "writing-expressions-with-variables-word-problems", "title": "Writing basic algebraic expressions word problems", "description": "Practice writing basic algebraic expressions to model real-world situations.", "slug": "writing-expressions-with-variables-word-problems", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/evaluating_expressions_1/", "id": "evaluating_expressions_1", "title": "Evaluating expressions with one variable", "description": "Practice plugging in a value for the variable in an equation. These are introductory problems, so the expressions aren't too complicated.", "slug": "evaluating_expressions_1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/evaluating_expressions_2/", "id": "evaluating_expressions_2", "title": "Evaluating expressions with two variables", "description": "Practice evaluating expressions in two variables by plugging in values for the variables.", "slug": "evaluating_expressions_2", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/evaluating-expressions-3/", "id": "evaluating-expressions-3", "title": "Evaluating expressions with variables word problems", "description": "Practice plugging in values to evaluate real-world algebraic expressions. These are introductory problems, so the expressions aren't too complicated.", "slug": "evaluating-expressions-3", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/combining-like-terms-1/", "id": "P6_sK8hRWCA", "title": "How to combine like terms", "kind": "Video", "description": "Another good explanation (minus Chuck Norris) on the how we combine like terms in algebra. This will totally make sense.", "slug": "combining-like-terms-1"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/combining-like-terms-3/", "id": "FNnmseBlvaY", "title": "Combining like terms, but more complicated", "kind": "Video", "description": "This example of combining like terms in an expression get a little hairy. Listen closely.", "slug": "combining-like-terms-3"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/combining_like_terms_1/", "id": "combining_like_terms_1", "title": "Combining like terms with negative coefficients", "description": "Simplify algebraic expressions by combining like terms. Coefficients on some terms are negative.", "slug": "combining_like_terms_1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/equivalent-forms-of-expressions-1/", "id": "equivalent-forms-of-expressions-1", "title": "Equivalent expressions with distribution and combining like terms", "description": "Practice determining whether or not two algebraic expressions are equivalent by manipulating the expressions. These problems require you to combine like terms and apply the distributive property.", "slug": "equivalent-forms-of-expressions-1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/equations-in-one-variable-1/", "id": "equations-in-one-variable-1", "title": "Writing one-step equations word problems", "description": "Practice writing basic equations to model real-world situations.", "slug": "equations-in-one-variable-1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/linear_equations_1/", "id": "linear_equations_1", "title": "One-step equations with multiplication and division", "description": "Practice solving equations in one step by multiplying or dividing a value from both sides.", "slug": "linear_equations_1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations/one_step_equations/", "id": "one_step_equations", "title": "One-step equations with addition and subtraction", "description": "Practice solving equations in one step by adding or subtracting the same value from both sides.", "slug": "one_step_equations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What is \"preservation of equality\"? Wait, why are we using letters in math? How can an 'x' represent a number? What number is it? I must figure this out!!! Yes, you must. This tutorial is great if you're just beginning to delve into the world of algebraic variables and expressions.", "node_slug": "in-variables-and-equations", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations", "extended_slug": "math/al-sixth-grade-math/al-patterns-relations/in-variables-and-equations", "kind": "Topic", "slug": "in-variables-and-equations"}], "in_knowledge_map": false, "description": "One of the fundamentals of algebra is learning to recognize patterns among numbers and being able to visualize those patterns and relationships. So...let's use some mathematical tools to visualize, interpret, and graph patterns involving the coordinate plane. Trust us, this sounds a lot more complicated than it really is. Just follow along and pause the videos as necessary.", "node_slug": "al-patterns-relations", "render_type": "Topic", "topic_page_url": "/math/al-sixth-grade-math/al-patterns-relations", "extended_slug": "math/al-sixth-grade-math/al-patterns-relations", "kind": "Topic", "slug": "al-patterns-relations"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-shape-space/", "id": "al-shape-space", "hide": false, "title": "Shape and Space", "child_data": [{"kind": "Topic", "id": "x074fb9e3"}, {"kind": "Topic", "id": "xcfc23968"}, {"kind": "Topic", "id": "x4f4e4cdc"}, {"kind": "Topic", "id": "xb5314feb"}, {"kind": "Topic", "id": "xfd230152"}, {"kind": "Topic", "id": "xc54bec4f"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/", "id": "al-angles", "hide": false, "title": "Angles", "child_data": [{"kind": "Exercise", "id": "196064396"}, {"kind": "Exercise", "id": "x6bc79072"}, {"kind": "Exercise", "id": "x3958fbe6"}, {"kind": "Exercise", "id": "47757395"}, {"kind": "Exercise", "id": "x0b7cb620"}, {"kind": "Exercise", "id": "x0dc914cc"}, {"kind": "Exercise", "id": "xc23bbfaa"}, {"kind": "Exercise", "id": "x353bd6f4"}, {"kind": "Video", "id": "265540637"}, {"kind": "Exercise", "id": "251616813"}, {"kind": "Exercise", "id": "xa92f72a2"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/measuring_angles/", "id": "measuring_angles", "title": "Measuring angles", "description": "Measure angles using a protractor.", "slug": "measuring_angles", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/drawing-angles/", "id": "drawing-angles", "title": "Drawing angles", "description": "Use a protractor to construct angles.", "slug": "drawing-angles", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/recognizing-angles/", "id": "recognizing-angles", "title": "Recognizing angles", "description": "Determine if angles in shapes and pictures are acute, right, or obtuse.", "slug": "recognizing-angles", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/angle_types/", "id": "angle_types", "title": "Angle types", "description": "Determine if an angle is acute, right, or obtuse. \u00a0A protractor is provided.", "slug": "angle_types", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/drawing-right-acute-and-obtuse-angles/", "id": "drawing-right--acute--and-obtuse-angles", "title": "Drawing right, acute, and obtuse angles", "description": "Create an acute, right, or obtuse angle using a given vertex.", "slug": "drawing-right-acute-and-obtuse-angles", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/benchmark-angles/", "id": "benchmark-angles", "title": "Benchmark angles", "description": "Estimate the size of angles when given a picture or a situation.", "slug": "benchmark-angles", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/recognizing-parallel-and-perpendicular-lines/", "id": "recognizing-parallel-and-perpendicular-lines", "title": "Recognizing parallel and perpendicular lines", "description": "Identify parallel and perpendicular lines in geometric figures and pictures.", "slug": "recognizing-parallel-and-perpendicular-lines", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/decomposing-angles/", "id": "decomposing-angles", "title": "Decomposing angles", "description": "Find an angle's measure when given the measure's of its parts.", "slug": "decomposing-angles", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/proof-sum-of-measures-of-angles-in-a-triangle-are-180/", "id": "6s1CI3uuhko", "title": "Proof: Measures of interior angles of a triangle sum to 180\u00b0", "kind": "Video", "description": "Sal gives a formal proof that the\u00a0measures of interior angles of a triangle sum to 180\u00b0.", "slug": "proof-sum-of-measures-of-angles-in-a-triangle-are-180"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/quadrilateral_types/", "id": "quadrilateral_types", "title": "Quadrilateral types", "description": "Identify quadrilaterals based on pictures or attributes. \u00a0Quadrilaterals included are parallelograms, rhombuses, rectangles, and squares.", "slug": "quadrilateral_types", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-angles/properties-of-shapes/", "id": "properties-of-shapes", "title": "Properties of shapes", "description": "Identify and compare shapes based on their attributes. \u00a0Shapes include triangle types, quadrilateral types, pentagons, and hexagons.", "slug": "properties-of-shapes", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This topic continues our journey by helping us understand angles and polygons and how they can relate to each other.", "node_slug": "al-angles", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-shape-space/al-angles", "extended_slug": "math/al-sixth-grade-math/al-shape-space/al-angles", "kind": "Topic", "slug": "al-angles"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-shape-space/al-perimeter-area/", "id": "al-perimeter-area", "hide": false, "title": "Perimeter and Area", "child_data": [{"kind": "Video", "id": "283213901"}, {"kind": "Exercise", "id": "720553954"}, {"kind": "Exercise", "id": "xe18536f6"}, {"kind": "Exercise", "id": "x575b0001"}, {"kind": "Video", "id": "372432668"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-shape-space/al-perimeter-area/perimeter-and-area-basics/", "id": "LoaBd-sPzkU", "title": "Perimeter and area: the basics", "kind": "Video", "description": "Great geometry primer on perimeter and area. Listen carefully. Sal explains the concepts so you'll understand them.", "slug": "perimeter-and-area-basics"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-perimeter-area/perimeter_of_squares_and_rectangles/", "id": "perimeter_of_squares_and_rectangles", "title": "Finding perimeter", "description": "Find perimeter or a side length of a figure without a visual shown.", "slug": "perimeter_of_squares_and_rectangles", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-perimeter-area/comparing-area-and-perimeter/", "id": "comparing-area-and-perimeter", "title": "Comparing area and perimeter", "description": "Compare the areas and perimeters of rectangles when given a context or picture.", "slug": "comparing-area-and-perimeter", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-perimeter-area/area-and-perimeter-of-rectangles-word-problems/", "id": "area-and-perimeter-of-rectangles-word-problems", "title": "Area and perimeter of rectangles word problems", "description": "Find the missing side length of a rectangle when given its perimeter or area. \u00a0Compare perimeters and areas of rectangles.", "slug": "area-and-perimeter-of-rectangles-word-problems", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-perimeter-area/perimeter-and-area-of-a-non-standard-polygon/", "id": "7S1MLJOG-5A", "title": "Perimeter and area of a non-standard polygon", "kind": "Video", "description": "Perimeter and Area of a Non-Standard Polygon", "slug": "perimeter-and-area-of-a-non-standard-polygon"}], "in_knowledge_map": false, "description": "Area and perimeter help us measure the size of 2D shapes. We'll take a conceptual look at how they are actually measured.", "node_slug": "al-perimeter-area", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-shape-space/al-perimeter-area", "extended_slug": "math/al-sixth-grade-math/al-shape-space/al-perimeter-area", "kind": "Topic", "slug": "al-perimeter-area"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/math/al-sixth-grade-math/al-shape-space/al-volume/", "id": "al-volume", "hide": false, "title": "Volume", "child_data": [{"kind": "Exercise", "id": "x47cf8468"}, {"kind": "Exercise", "id": "x42be8afc"}, {"kind": "Exercise", "id": "x5c621858"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-shape-space/al-volume/volume_with_unit_cubes/", "id": "volume_with_unit_cubes", "title": "Volume with unit cubes 1", "description": "Find volume of three-dimensional figures by counting unit cubes.", "slug": "volume_with_unit_cubes", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-volume/volume_1/", "id": "volume_1", "title": "Volume 1", "description": "Find volume of a rectangular prism with labeled sides. \u00a0Find a missing side length on a rectangular prism when given the volume.", "slug": "volume_1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-volume/volume_2/", "id": "volume_2", "title": "Volume word problems", "description": "Find volume of rectangular prisms to solve word problems.", "slug": "volume_2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Volume measures how much 3-dimensional \"space\" an object takes up. We'll see in this tutorial how we measure the volume of rectangular prisms", "node_slug": "al-volume", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-shape-space/al-volume", "extended_slug": "math/al-sixth-grade-math/al-shape-space/al-volume", "kind": "Topic", "slug": "al-volume"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons/", "id": "al-triangles-polygons", "hide": false, "title": "Triangles and Polygons", "child_data": [{"kind": "Video", "id": "xdb593bbc"}, {"kind": "Video", "id": "x7eb84d3e"}, {"kind": "Exercise", "id": "xe0848d0d"}, {"kind": "Exercise", "id": "xf1dc0080"}, {"kind": "Video", "id": "287107579"}, {"kind": "Exercise", "id": "324859999"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons/scalene-isosceles-equilateral-acute-right-obtuse/", "id": "D5lZ3thuEeA", "title": "Triangles: categorization by angle or equal sides.", "kind": "Video", "description": "Scalene, isosceles, equilateral, acute, right, obtuse. All are types of triangles but what makes them special depends on the method of categorization. Watch this outstanding explanation.", "slug": "scalene-isosceles-equilateral-acute-right-obtuse"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons/scalene-isosceles-equilateral-from-angle/", "id": "sZMezOCZr40", "title": "Triangles: using angles to categorize", "kind": "Video", "description": "You say you can't categorize a triangle because you don't know the length of the sides. Guess what? If you know the size of the angles you can!", "slug": "scalene-isosceles-equilateral-from-angle"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons/recognizing-triangles/", "id": "recognizing-triangles", "title": "Recognizing triangle types", "description": "Identify triangles by their angles as acute, right, or obtuse. \u00a0Identify triangles by their side-lengths as equilateral, isosceles, or scalene.", "slug": "recognizing-triangles", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons/classifying-shapes-by-line-and-angle-types/", "id": "classifying-shapes-by-line-and-angle-types", "title": "Classifying shapes by line and angle types", "description": "Classify shapes based on pictures or attributes, such as angle types and side-lengths.", "slug": "classifying-shapes-by-line-and-angle-types", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons/sum-of-interior-angles-of-a-polygon/", "id": "qG3HnRccrQU", "title": "Sum of interior angles of a polygon", "kind": "Video", "description": "Showing a generalized way to find the sum of the interior angles of any polygon", "slug": "sum-of-interior-angles-of-a-polygon"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons/angles_of_a_polygon/", "id": "angles_of_a_polygon", "title": "Angles of a polygon", "slug": "angles_of_a_polygon", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What do we know about a triangle if two of the sides are congruent (an isosceles triangle) or all three are congruent (an equilateral)? What abut their angles? Let's find out.", "node_slug": "al-triangles-polygons", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-shape-space/al-triangles-polygons", "extended_slug": "math/al-sixth-grade-math/al-shape-space/al-triangles-polygons", "kind": "Topic", "slug": "al-triangles-polygons"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/", "id": "al-coordinate-plane", "hide": false, "title": "Coordinate plane", "child_data": [{"kind": "Video", "id": "xba8b84ab"}, {"kind": "Exercise", "id": "2016"}, {"kind": "Exercise", "id": "xcb17d9e9"}, {"kind": "Exercise", "id": "342773513"}, {"kind": "Video", "id": "396277331"}, {"kind": "Exercise", "id": "x9b3a7f92"}, {"kind": "Exercise", "id": "x6fe7dd73"}, {"kind": "Exercise", "id": "xf0293235"}, {"kind": "Exercise", "id": "xd6d728fb"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/graphing-points-exercise/", "id": "4vNloi-zNjU", "title": "Coordinate plane: graphing points", "kind": "Video", "description": "This exercise asks us to graph a set of points from an ordered pair on the x and y axis of a coordinate plane.", "slug": "graphing-points-exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/graphing_points/", "id": "graphing_points", "title": "Graphing points", "description": "Plot a given point on the coordinate plane.", "slug": "graphing_points", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/coordinate-plane-word-problems-in-the-first-quadrant/", "id": "coordinate-plane-word-problems-in-the-first-quadrant", "title": "Coordinate plane word problems in the first quadrant", "description": "Find the distance between points, graph points, and interpret data on coordinate planes to solve word problems.", "slug": "coordinate-plane-word-problems-in-the-first-quadrant", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/graphing_points_2/", "id": "graphing_points_2", "title": "Graphing points and naming quadrants", "description": "Practice graphing points and identifying which quadrants they're in.", "slug": "graphing_points_2", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/plot-ordered-pairs/", "id": "5ctsUsvIp8w", "title": "Coordinate plane: plot ordered pairs", "kind": "Video", "description": "We're plotting an ordered pair on the x (horizontal) axis and y (vertical) axis of the coordinate plane.", "slug": "plot-ordered-pairs"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/relative-position-on-the-coordinate-plane/", "id": "relative-position-on-the-coordinate-plane", "title": "Distance between points on the coordinate plane", "description": "Practice finding the distance between two points on the coordinate plane that share the same x- or y-coordinate.", "slug": "relative-position-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/polygons-in-the-coordinate-plane/", "id": "polygons-in-the-coordinate-plane", "title": "Quadrilateral problems on the coordinate plane", "description": "Challenge problems involving the coordinates of the vertices of the quadrilaterals", "slug": "polygons-in-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/drawing-polygons/", "id": "drawing-polygons", "title": "Drawing polygons with coordinates", "description": "Practice drawing shapes on the coordinate plane.", "slug": "drawing-polygons", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane/drawing-polygons-2/", "id": "drawing-polygons-2", "title": "Drawing polygons with coordinates 2", "description": "More challenging problems involving drawing shapes on the coordinate plane.", "slug": "drawing-polygons-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We use coordinates to describe where something is. In geometry, coordinates say where points are on a grid we call the \"coordinate plane\".", "node_slug": "al-coordinate-plane", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-shape-space/al-coordinate-plane", "extended_slug": "math/al-sixth-grade-math/al-shape-space/al-coordinate-plane", "kind": "Topic", "slug": "al-coordinate-plane"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/", "id": "al-transformations", "hide": false, "title": "Transformations", "child_data": [{"kind": "Video", "id": "x78b40eae"}, {"kind": "Video", "id": "x7856e9c3"}, {"kind": "Video", "id": "x1e570b55"}, {"kind": "Exercise", "id": "x73c74d82"}, {"kind": "Video", "id": "x2d3daf59"}, {"kind": "Exercise", "id": "xc4fb61cc"}, {"kind": "Video", "id": "xd4398860"}, {"kind": "Exercise", "id": "xbdeb6941"}, {"kind": "Video", "id": "x2bf83c62"}, {"kind": "Video", "id": "x16ace6c3"}, {"kind": "Exercise", "id": "x8bd33d7c"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/axis-of-symmetry/", "id": "LrTn4cvsewk", "title": "Introduction to reflective symmetry", "kind": "Video", "description": "Sal introduces the concept of an \"axis of symmetry.\"", "slug": "axis-of-symmetry"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/introduction-to-transformations/", "id": "XiAoUDfrar0", "title": "Introduction to geometric transformations", "kind": "Video", "description": "Sal introduces geometric transformations! Specifically, he explains what the \"image\" of a transformations is, what are the \"rigid\" transformations, and which transformations are not rigid.", "slug": "introduction-to-transformations"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/translation-example/", "id": "oxSzkIftog8", "title": "How to perform a translation (example)", "kind": "Video", "description": "Sal shows how to perform a translation on a triangle using our interactive widget!", "slug": "translation-example"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/performing-translations-on-the-coordinate-plane/", "id": "performing-translations-on-the-coordinate-plane", "title": "Perform translations", "description": "Use the interactive transformation tool to perform translations.", "slug": "performing-translations-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/using-rotation-widget/", "id": "UKM8BnpZr94", "title": "How to perform a rotation (example)", "kind": "Video", "description": "Sal shows how to perform a rotation on a pentagon using our interactive widget!", "slug": "using-rotation-widget"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/performing-rotations-on-the-coordinate-plane/", "id": "performing-rotations-on-the-coordinate-plane", "title": "Perform rotations", "description": "Use the interactive transformation tool to perform rotations.", "slug": "performing-rotations-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/using-reflection-tool/", "id": "RLyXTj2j_c4", "title": "How to perform a reflection (example)", "kind": "Video", "description": "Sal shows how to perform a reflection on a quadrilateral using our interactive widget!", "slug": "using-reflection-tool"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/performing-reflections-on-the-coordinate-plane/", "id": "performing-reflections-on-the-coordinate-plane", "title": "Perform reflections", "description": "Use the interactive transformation tool to perform reflections.", "slug": "performing-reflections-on-the-coordinate-plane", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/constructing-quad-based-on-symmetry/", "id": "-nufZ41Kg5c", "title": "How to construct a quadrilateral based on its line of symmetry (example)", "kind": "Video", "description": "Sal solves the following problem:\n\nTwo of the points that define a certain quadrilateral are (0,9) and (3,4). The quadrilateral has reflective symmetry over the line y=3-x. Draw and classify the quadrilateral.", "slug": "constructing-quad-based-on-symmetry"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/reflecting-across-two-lines/", "id": "ANnuQZyEKVo", "title": "How to construct a quadrilateral based on its two lines of symmetry (example)", "kind": "Video", "description": "Sal solves the following problem:\n\nTwo of the points that define a certain quadrilateral are (-4,-2) and (0,5). The quadrilateral has a\u00a0reflective symmetry over the lines y=x/2 and\u00a0y=-2x + 5.\u00a0Draw and classify the quadrilateral.", "slug": "reflecting-across-two-lines"}, {"path": "khan/math/al-sixth-grade-math/al-shape-space/al-transformations/symmetry-of-two-dimensional-shapes/", "id": "symmetry-of-two-dimensional-shapes", "title": "Symmetry of two-dimensional shapes", "description": "Analyze various shapes according to their reflective and rotational symmetries.", "slug": "symmetry-of-two-dimensional-shapes", "kind": "Exercise"}], "in_knowledge_map": false, "description": "It's time to learn about the most useful math concept for creating video game graphics: geometric transformations.", "node_slug": "al-transformations", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-shape-space/al-transformations", "extended_slug": "math/al-sixth-grade-math/al-shape-space/al-transformations", "kind": "Topic", "slug": "al-transformations"}], "in_knowledge_map": false, "description": "If you think about it, we are surrounded by shapes! And did you know EVERYTHING can be measured? Whether 3D or 2D! And wait....how about how shapes move? Transformations! Lets explore it all!", "node_slug": "al-shape-space", "render_type": "Topic", "topic_page_url": "/math/al-sixth-grade-math/al-shape-space", "extended_slug": "math/al-sixth-grade-math/al-shape-space", "kind": "Topic", "slug": "al-shape-space"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-statistics-probability/", "id": "al-statistics-probability", "hide": false, "title": "Statistics and Probability", "child_data": [{"kind": "Topic", "id": "x4382bf18"}, {"kind": "Topic", "id": "x18e59a7e"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-data/", "id": "al-data", "hide": false, "title": "Data", "child_data": [{"kind": "Video", "id": "380860452"}, {"kind": "Video", "id": "380855564"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-data/u08-l1-t2-we2-reading-line-graphs/", "id": "36v2EXZRzUE", "title": "Reading line graphs", "kind": "Video", "description": "A line graph is another way to visually represent data, especially data that changes over time. They are extremely useful Let's take a look at this example.", "slug": "u08-l1-t2-we2-reading-line-graphs"}, {"path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-data/misleading-line-graphs/", "id": "gs-OPF3KEGU", "title": "Misleading line graphs", "kind": "Video", "description": "Misleading Line Graphs", "slug": "misleading-line-graphs"}], "in_knowledge_map": false, "description": "These tutorials are good for some basic understanding of how to read line graphs", "node_slug": "al-data", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-statistics-probability/al-data", "extended_slug": "math/al-sixth-grade-math/al-statistics-probability/al-data", "kind": "Topic", "slug": "al-data"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/", "id": "al-probability", "hide": false, "title": "Probability", "child_data": [{"kind": "Video", "id": "185786265"}, {"kind": "Video", "id": "191769946"}, {"kind": "Video", "id": "380860449"}, {"kind": "Video", "id": "27092"}, {"kind": "Exercise", "id": "1337007129"}, {"kind": "Exercise", "id": "13179429"}, {"kind": "Exercise", "id": "xfe118dde"}, {"kind": "Exercise", "id": "x718b4591"}], "children": [{"path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/basic-probability/", "id": "uzkc-qNVoOk", "title": "Probability explained", "kind": "Video", "description": "We give you an introduction to probability through the example of flipping a quarter and rolling a die.", "slug": "basic-probability"}, {"path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/getting-at-least-one-heads/", "id": "mkyZ45KQYi4", "title": "Coin flipping probability", "kind": "Video", "description": "In this video, we 'll explore the probability of getting at least one heads in multiple flips of a fair coin.", "slug": "getting-at-least-one-heads"}, {"path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/coin-flipping-example/", "id": "3UlE8gyKbkU", "title": "Example: All the ways you can flip a coin", "kind": "Video", "description": "Manually going through the combinatorics to determine the probability of an event occuring", "slug": "coin-flipping-example"}, {"path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/events-and-outcomes-2/", "id": "O4Qnsubo2tg", "title": "Die rolling probability", "kind": "Video", "description": "We're thinking about the probability of rolling doubles on a pair of dice. Let's create a grid of all possible outcomes.", "slug": "events-and-outcomes-2"}, {"path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/dice_probability/", "id": "dice_probability", "title": "Probability of rolling dice", "description": "Practice calculating probabilities in dice rolling scenarios.", "slug": "dice_probability", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/probability_1/", "id": "probability_1", "title": "Simple probability", "description": "Practice finding probabilities of events, such as rolling dice, drawing marbles out of a bag, and spinning spinners.", "slug": "probability_1", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/finding-probability/", "id": "finding-probability", "title": "Experimental probability", "description": "Practice making reasonable estimates of the likelihood of future events based on past experience.", "slug": "finding-probability", "kind": "Exercise"}, {"path": "khan/math/al-sixth-grade-math/al-statistics-probability/al-probability/probability-models/", "id": "probability-models", "title": "Probability models", "description": "Practice creating probability models and understand what makes a valid probability model.", "slug": "probability-models", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Flip a quarter a hundred times. What's the probability that it will turn up heads? Tails? Explores probability models, sample spaces, predict the frequency of an outcome of a simple probability experiment or game and a whole lot more.", "node_slug": "al-probability", "render_type": "Tutorial", "topic_page_url": "/math/al-sixth-grade-math/al-statistics-probability/al-probability", "extended_slug": "math/al-sixth-grade-math/al-statistics-probability/al-probability", "kind": "Topic", "slug": "al-probability"}], "in_knowledge_map": false, "description": "We dare you to go through a day in which you never consider or use probability or statistics. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We constantly making predictions and looking at data around us: here's a bit on line graphs and probabilities!", "node_slug": "al-statistics-probability", "render_type": "Topic", "topic_page_url": "/math/al-sixth-grade-math/al-statistics-probability", "extended_slug": "math/al-sixth-grade-math/al-statistics-probability", "kind": "Topic", "slug": "al-statistics-probability"}], "in_knowledge_map": false, "description": "By the 6th grade, you're starting to become a sophisticated mathemagician. You'll be able to add, subtract, multiply, and divide any non-negative numbers (including decimals and fractions) that any grumpy ogre throws at you. Ratios, percents, and variable expressions will start being in your comfort zone. Most importantly, the algebraic side of mathematics is a whole new kind of fun! And if that is not enough, we are going to continue with our understanding of ideas like the coordinate plane and area and much more!", "node_slug": "al-sixth-grade-math", "render_type": "Subject", "topic_page_url": "/math/al-sixth-grade-math", "extended_slug": "math/al-sixth-grade-math", "kind": "Topic", "slug": "al-sixth-grade-math"}], "in_knowledge_map": false, "description": "Watch videos and practice your skills for almost any math subject.", "node_slug": "math", "render_type": "Domain", "topic_page_url": "/math", "extended_slug": "math", "kind": "Topic", "slug": "math"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/", "id": "science", "hide": false, "title": "Science", "child_data": [{"kind": "Topic", "id": "x324d1dcc"}, {"kind": "Topic", "id": "x4122fa5d"}, {"kind": "Topic", "id": "x822131fc"}, {"kind": "Topic", "id": "x1079cbfa"}, {"kind": "Topic", "id": "xcdef9704"}, {"kind": "Topic", "id": "x6e556f83"}, {"kind": "Topic", "id": "xedb305cc"}, {"kind": "Topic", "id": "xae887ec6"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/biology/", "id": "biology", "hide": false, "title": "Biology", "child_data": [{"kind": "Topic", "id": "x676dc616"}, {"kind": "Topic", "id": "xad41fac7"}, {"kind": "Topic", "id": "x3b0a9408"}, {"kind": "Topic", "id": "x378be429"}, {"kind": "Topic", "id": "x165544a8"}, {"kind": "Topic", "id": "xdffb52d5"}, {"kind": "Topic", "id": "x9ad19cd0"}, {"kind": "Topic", "id": "x43050e3d"}, {"kind": "Topic", "id": "xc30c1ada"}, {"kind": "Topic", "id": "x2239497e"}, {"kind": "Topic", "id": "xb67ac68d"}, {"kind": "Topic", "id": "x761836ed"}, {"kind": "Topic", "id": "xd3de1291"}, {"kind": "Topic", "id": "x1d5702b4"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/biology/chemistry-of-life/", "id": "chemistry--of-life", "hide": false, "title": "Chemistry of life", "child_data": [{"kind": "Topic", "id": "xe142d6b7"}, {"kind": "Topic", "id": "xaf0b5f54"}, {"kind": "Topic", "id": "x42097c0b"}, {"kind": "Topic", "id": "xa0d86d92"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/science/biology/chemistry-of-life/skill-check-chemistry-of-life/", "id": "skill-check-chemistry-of-life", "hide": false, "title": "Chemistry of life skill checks", "child_data": [{"kind": "Exercise", "id": "xad48708f"}, {"kind": "Exercise", "id": "xa3063273"}], "children": [{"path": "khan/science/biology/chemistry-of-life/skill-check-chemistry-of-life/skill-check-atoms-and-periodic-table/", "id": "skill-check--atoms-and-periodic-table", "title": "Skill check: Atoms and the periodic table", "description": "Check your understanding of atoms and the periodic table!", "slug": "skill-check-atoms-and-periodic-table", "kind": "Exercise"}, {"path": "khan/science/biology/chemistry-of-life/skill-check-chemistry-of-life/chemical-bonds-and-reactions/", "id": "chemical-bonds-and-reactions", "title": "Skill check: Chemical bonds and reactions", "description": "Check your understanding of chemical bonds and reactions!", "slug": "chemical-bonds-and-reactions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Check your understanding of the basic chemistry that makes life possible!", "node_slug": "skill-check-chemistry-of-life", "render_type": "Tutorial", "topic_page_url": "/science/biology/chemistry--of-life/skill-check-chemistry-of-life", "extended_slug": "science/biology/chemistry--of-life/skill-check-chemistry-of-life", "kind": "Topic", "slug": "skill-check-chemistry-of-life"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/chemistry-of-life/elements-and-atoms/", "id": "elements-and-atoms", "hide": false, "title": "Elements and atoms", "child_data": [{"kind": "Video", "id": "183171788"}, {"kind": "Article", "id": "x08dad143"}, {"kind": "Video", "id": "369058"}, {"kind": "Article", "id": "xf63af190"}], "children": [{"path": "khan/science/biology/chemistry-of-life/elements-and-atoms/elements-and-atoms/", "id": "IFKnq9QM6_A", "title": "Elements and atoms", "kind": "Video", "description": "How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom.", "slug": "elements-and-atoms"}, {"path": "khan/science/biology/chemistry-of-life/elements-and-atoms/introduction-to-the-atom/", "id": "1xSQlwWGT8M", "title": "Introduction to the atom", "kind": "Video", "description": "The atom, proton, neutron and electron", "slug": "introduction-to-the-atom"}], "in_knowledge_map": false, "description": "Learn what matter is made of! We'll cover elements, atoms, and subatomic particles (protons, neutrons, and electrons). We'll also check out isotopes, radioactivity, and carbon dating.", "node_slug": "elements-and-atoms", "render_type": "Tutorial", "topic_page_url": "/science/biology/chemistry--of-life/elements-and-atoms", "extended_slug": "science/biology/chemistry--of-life/elements-and-atoms", "kind": "Topic", "slug": "elements-and-atoms"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/chemistry-of-life/electron-shells-and-orbitals/", "id": "electron-shells-and-orbitals", "hide": false, "title": "Electron shells and orbitals", "child_data": [{"kind": "Video", "id": "425003"}, {"kind": "Video", "id": "364060"}, {"kind": "Video", "id": "xe67b83bf"}, {"kind": "Video", "id": "x68205349"}, {"kind": "Article", "id": "x370ee996"}], "children": [{"path": "khan/science/biology/chemistry-of-life/electron-shells-and-orbitals/orbitals/", "id": "yBrp8uvNAhI", "title": "Orbitals", "kind": "Video", "description": "An introduction to orbitals", "slug": "orbitals"}, {"path": "khan/science/biology/chemistry-of-life/electron-shells-and-orbitals/more-on-orbitals-and-electron-configuration/", "id": "FmQoSenbtnU", "title": "More on orbitals and electron configuration", "kind": "Video", "description": "More intuition on orbitals. Touching on electron configuration.", "slug": "more-on-orbitals-and-electron-configuration"}, {"path": "khan/science/biology/chemistry-of-life/electron-shells-and-orbitals/valence-electrons-lewis/", "id": "NYtPw0WiUCo", "title": "Valence electrons and bonding", "kind": "Video", "description": "How to get Lewis structures from electron configuration, and how valence electrons are involved in forming bonds.", "slug": "valence-electrons-lewis"}, {"path": "khan/science/biology/chemistry-of-life/electron-shells-and-orbitals/periodic-table-groups/", "id": "UXOcWAfBdZg", "title": "Groups of the periodic table", "kind": "Video", "description": "What is a group in the periodic table, and what do elements in a group have in common?", "slug": "periodic-table-groups"}], "in_knowledge_map": false, "description": "Learn how electrons are organized in atoms! We will cover the Bohr model, electron shells, and orbitals, as well as periodic table trends in electron configurations and reactivity.", "node_slug": "electron-shells-and-orbitals", "render_type": "Tutorial", "topic_page_url": "/science/biology/chemistry--of-life/electron-shells-and-orbitals", "extended_slug": "science/biology/chemistry--of-life/electron-shells-and-orbitals", "kind": "Topic", "slug": "electron-shells-and-orbitals"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/chemistry-of-life/chemical-bonds-and-reactions/", "id": "chemical-bonds-and-reactions", "hide": false, "title": "Chemical bonds and reactions", "child_data": [{"kind": "Video", "id": "389051"}, {"kind": "Video", "id": "x8dafd3b7"}, {"kind": "Video", "id": "x57ecb61f"}, {"kind": "Video", "id": "x3d65853e"}, {"kind": "Article", "id": "x1dacd669"}, {"kind": "Video", "id": "xaf8adcff"}, {"kind": "Article", "id": "xc0070c1e"}], "children": [{"path": "khan/science/biology/chemistry-of-life/chemical-bonds-and-reactions/ionic-covalent-and-metallic-bonds/", "id": "CGA8sRwqIFg", "title": "Ionic, covalent, and metallic bonds", "kind": "Video", "description": "Introduction to ionic, covalent, polar covalent and metallic bonds.", "slug": "ionic-covalent-and-metallic-bonds"}, {"path": "khan/science/biology/chemistry-of-life/chemical-bonds-and-reactions/electronegativity-trends/", "id": "Rr7LhdSKMxY", "title": "Electronegativity", "kind": "Video", "description": "Defines electronegativity and compares to electron affinity. Explains group and period trends in electronegativity using atomic radii.", "slug": "electronegativity-trends"}, {"path": "khan/science/biology/chemistry-of-life/chemical-bonds-and-reactions/electronegativity-and-chemical-bonds/", "id": "126N4hox9YA", "title": "Electronegativity and bonding", "kind": "Video", "description": "Electronegativity differences in bonding using Pauling scale. Using differences in electronegativity to classify bonds as covalent, polar covalent, or ionic.", "slug": "electronegativity-and-chemical-bonds"}, {"path": "khan/science/biology/chemistry-of-life/chemical-bonds-and-reactions/intermolecular-forces-and-molecular-bonds/", "id": "pBZ-RiT5nEE", "title": "Intermolecular forces", "kind": "Video", "description": "Identifying the intermolecular forces present between molecules", "slug": "intermolecular-forces-and-molecular-bonds"}, {"path": "khan/science/biology/chemistry-of-life/chemical-bonds-and-reactions/chemical-reactions-introduction/", "id": "TStjgUmL1RQ", "title": "Chemical reactions introduction", "kind": "Video", "description": "Reactants and products in reversible and irreversible chemical reactions.", "slug": "chemical-reactions-introduction"}], "in_knowledge_map": false, "description": "Find out how atoms interact with each other to form bonds! We'll look at the different types of strong bonds, including nonpolar covalent, polar covalent, and ionic bonds, as well as weak bonds such as hydrogen bonds and London dispersion forces.", "node_slug": "chemical-bonds-and-reactions", "render_type": "Tutorial", "topic_page_url": "/science/biology/chemistry--of-life/chemical-bonds-and-reactions", "extended_slug": "science/biology/chemistry--of-life/chemical-bonds-and-reactions", "kind": "Topic", "slug": "chemical-bonds-and-reactions"}], "in_knowledge_map": false, "description": "Learn how chemistry makes life possible! From you, to your dog, to your dinner, to the global ecosystem, all living systems are made out of atoms that obey the basic rules of chemistry. Here, you can learn about the key properties of atoms, including what particles they contain, how they are organized, and how they form chemical bonds with one another.", "node_slug": "chemistry--of-life", "render_type": "Topic", "topic_page_url": "/science/biology/chemistry--of-life", "extended_slug": "science/biology/chemistry--of-life", "kind": "Topic", "slug": "chemistry-of-life"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/biology/water-acids-and-bases/", "id": "water-acids-and-bases", "hide": false, "title": "Water, acids, and bases", "child_data": [{"kind": "Topic", "id": "xededd545"}, {"kind": "Topic", "id": "x6cce909b"}, {"kind": "Topic", "id": "x0dfb6688"}, {"kind": "Topic", "id": "x23e69095"}, {"kind": "Topic", "id": "x3bc58d63"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/science/biology/water-acids-and-bases/properties-of-water-skill-check/", "id": "properties-of-water-skill-check", "hide": false, "title": "Properties of water skill check", "child_data": [{"kind": "Exercise", "id": "x76819a00"}], "children": [{"path": "khan/science/biology/water-acids-and-bases/properties-of-water-skill-check/skill-check-properties-of-water/", "id": "skill-check--properties-of-water", "title": "Skill check: Properties of water", "description": "Test your understanding of the properties of water!", "slug": "skill-check-properties-of-water", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Check your understanding of the life-sustaining properties of water!", "node_slug": "properties-of-water-skill-check", "render_type": "Tutorial", "topic_page_url": "/science/biology/water-acids-and-bases/properties-of-water-skill-check", "extended_slug": "science/biology/water-acids-and-bases/properties-of-water-skill-check", "kind": "Topic", "slug": "properties-of-water-skill-check"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/water-acids-and-bases/hydrogen-bonding-in-water/", "id": "hydrogen-bonding-in-water", "hide": false, "title": "Hydrogen bonding in water", "child_data": [{"kind": "Video", "id": "xc28468ba"}, {"kind": "Article", "id": "x3622f0f4"}, {"kind": "Video", "id": "x139c1eb0"}, {"kind": "Article", "id": "xc4e359bb"}], "children": [{"path": "khan/science/biology/water-acids-and-bases/hydrogen-bonding-in-water/hydrogen-bonding-in-water/", "id": "6G1evL7ELwE", "title": "Hydrogen bonding in water", "kind": "Video", "description": "Hydrogen bonding in water", "slug": "hydrogen-bonding-in-water"}, {"path": "khan/science/biology/water-acids-and-bases/hydrogen-bonding-in-water/water-as-a-solvent/", "id": "lCvBp73ZJ-A", "title": "Water as a solvent", "kind": "Video", "description": "Water as a solvent. Polar solutes. Hydrophilic and hydrophobic substances.", "slug": "water-as-a-solvent"}], "in_knowledge_map": false, "description": "Water is key to life, and hydrogen bonding is key to understanding water! Learn how the structure of water and the properties of O and H atoms allow water molecules to \"stick\" to each other via hydrogen bonds, as well as why water makes a great solvent (why you can dissolve stuff in it so well).", "node_slug": "hydrogen-bonding-in-water", "render_type": "Tutorial", "topic_page_url": "/science/biology/water-acids-and-bases/hydrogen-bonding-in-water", "extended_slug": "science/biology/water-acids-and-bases/hydrogen-bonding-in-water", "kind": "Topic", "slug": "hydrogen-bonding-in-water"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/water-acids-and-bases/cohesion-and-adhesion/", "id": "cohesion-and-adhesion", "hide": false, "title": "Cohesion and adhesion", "child_data": [{"kind": "Video", "id": "x451fa8cc"}, {"kind": "Video", "id": "x097b2cfb"}, {"kind": "Article", "id": "x2061e10b"}], "children": [{"path": "khan/science/biology/water-acids-and-bases/cohesion-and-adhesion/capillary-action-and-why-we-see-a-meniscus/", "id": "eQXGpturk3A", "title": "Capillary action and why we see a meniscus", "kind": "Video", "description": "How capillary action and the meniscus are related to intermolecular forces in water.", "slug": "capillary-action-and-why-we-see-a-meniscus"}, {"path": "khan/science/biology/water-acids-and-bases/cohesion-and-adhesion/surface-tension/", "id": "_RTF0DAHBBM", "title": "Surface tension", "kind": "Video", "description": "Surface tension in water, and how the surface tension is related to hydrogen bonding.", "slug": "surface-tension"}], "in_knowledge_map": false, "description": "Water molecules like to stick together! Learn more about the cohesive (and adhesive) properties of water and why they're important for bugs, trees, and the tear ducts in your eyes!", "node_slug": "cohesion-and-adhesion", "render_type": "Tutorial", "topic_page_url": "/science/biology/water-acids-and-bases/cohesion-and-adhesion", "extended_slug": "science/biology/water-acids-and-bases/cohesion-and-adhesion", "kind": "Topic", "slug": "cohesion-and-adhesion"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas/", "id": "water-as-a-solid-liquid-and-gas", "hide": false, "title": "Temperature and state changes in water", "child_data": [{"kind": "Video", "id": "1022193589"}, {"kind": "Video", "id": "x57ce9014"}, {"kind": "Video", "id": "xac337cc2"}, {"kind": "Video", "id": "xd0570e1e"}, {"kind": "Video", "id": "x79241b59"}, {"kind": "Article", "id": "xce07173a"}], "children": [{"path": "khan/science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas/lebron-asks-why-does-sweating-cool-you-down/", "id": "jgnNhL2jSXY", "title": "LeBron Asks: Why does sweating cool you down?", "kind": "Video", "description": "LeBron asks Sal why sweating helps cool the body down.", "slug": "lebron-asks-why-does-sweating-cool-you-down"}, {"path": "khan/science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas/evaporative-cooling/", "id": "_eEONOJHnEs", "title": "Evaporative cooling", "kind": "Video", "description": "Evaporative cooling. Why sweating cools you down.", "slug": "evaporative-cooling"}, {"path": "khan/science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas/heat-of-vaporization-of-water-and-ethanol/", "id": "bVHuI_QpYIM", "title": "Heat of vaporization of water and ethanol", "kind": "Video", "description": "Heat of vaporization of water and ethanol", "slug": "heat-of-vaporization-of-water-and-ethanol"}, {"path": "khan/science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas/specific-heat-of-water/", "id": "h-31O7CaF2o", "title": "Specific heat of water", "kind": "Video", "description": "Specific heat of water. A calorie as the specific heat of water. How water moderates temperature.", "slug": "specific-heat-of-water"}, {"path": "khan/science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas/liquid-water-denser-than-solid-water-ice/", "id": "Y3ATc9he254", "title": "Liquid water denser than solid water (ice)", "kind": "Video", "description": "Water less dense as ice. Why lakes don't freeze solid.", "slug": "liquid-water-denser-than-solid-water-ice"}], "in_knowledge_map": false, "description": "Ever wonder why sweating cools you off? Or why ice cubes float in a glass? If so, you're in the right place! Learn about what happens to water when it heats up, cools down, and changes state (becoming a solid or a gas). We'll see why water is great at resisting changes in temperature, and why ice is less dense than liquid water.", "node_slug": "water-as-a-solid-liquid-and-gas", "render_type": "Tutorial", "topic_page_url": "/science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas", "extended_slug": "science/biology/water-acids-and-bases/water-as-a-solid-liquid-and-gas", "kind": "Topic", "slug": "water-as-a-solid-liquid-and-gas"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/water-acids-and-bases/acids-bases-and-ph/", "id": "acids-bases-and-ph", "hide": false, "title": "Acids, bases, and pH", "child_data": [{"kind": "Video", "id": "x389f5189"}, {"kind": "Video", "id": "xd9df8b54"}, {"kind": "Video", "id": "x555c28b0"}, {"kind": "Video", "id": "xff203ebc"}, {"kind": "Video", "id": "x39758a10"}, {"kind": "Article", "id": "x5470d9b5"}], "children": [{"path": "khan/science/biology/water-acids-and-bases/acids-bases-and-ph/autoionization-water/", "id": "NUyYlRxMtcs", "title": "Autoionization of water", "kind": "Video", "description": "Autoionization of water into hydronium and hydroxide ions", "slug": "autoionization-water"}, {"path": "khan/science/biology/water-acids-and-bases/acids-bases-and-ph/arrhenius-definition-of-acids-and-bases/", "id": "Y4HzGldIAss", "title": "Arrhenius definition of acids and bases", "kind": "Video", "description": "Arrhenius definition of acids and bases", "slug": "arrhenius-definition-of-acids-and-bases"}, {"path": "khan/science/biology/water-acids-and-bases/acids-bases-and-ph/bronsted-lowry-definition-of-acids-and-bases/", "id": "XVOU9c3crbc", "title": "Bronsted-Lowry definition of acids and bases", "kind": "Video", "description": "Bronsted-Lowry definition of acids and bases. Conjugate acids and bases.", "slug": "bronsted-lowry-definition-of-acids-and-bases"}, {"path": "khan/science/biology/water-acids-and-bases/acids-bases-and-ph/introduction-to-definition-of-ph/", "id": "J7-GewgqWUQ", "title": "Definition of pH", "kind": "Video", "description": "Introduction to pH and the pH scale. Examples of calculating pH of pure water, bleach, and orange juice.", "slug": "introduction-to-definition-of-ph"}, {"path": "khan/science/biology/water-acids-and-bases/acids-bases-and-ph/buffer-system/", "id": "gjKmQ501sAg", "title": "Introduction to buffers", "kind": "Video", "description": "Introduction to buffer systems, which regulate pH in blood", "slug": "buffer-system"}], "in_knowledge_map": false, "description": "You may know that lemon juice is acidic, and that bleach is basic. But did you know that acid-base chemistry is happening all the time in your body? Learn what makes something an acid or base, what the pH scale really measures, and how buffers work in your blood!", "node_slug": "acids-bases-and-ph", "render_type": "Tutorial", "topic_page_url": "/science/biology/water-acids-and-bases/acids-bases-and-ph", "extended_slug": "science/biology/water-acids-and-bases/acids-bases-and-ph", "kind": "Topic", "slug": "acids-bases-and-ph"}], "in_knowledge_map": false, "description": "Where would we be without water? Well, we probably wouldn't exist at all! Learn more about this fascinating molecule: its hydrogen bonds, its properties, and why it's a key ingredient for biological systems of all sizes. Plus, brush up on the acid-base chemistry that takes place in water (and learn how it works in your own bloodstream)!", "node_slug": "water-acids-and-bases", "render_type": "Topic", "topic_page_url": "/science/biology/water-acids-and-bases", "extended_slug": "science/biology/water-acids-and-bases", "kind": "Topic", "slug": "water-acids-and-bases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/biology/properties-of-carbon/", "id": "properties-of-carbon", "hide": false, "title": "Properties of carbon", "child_data": [{"kind": "Topic", "id": "x4f96b2a4"}, {"kind": "Topic", "id": "xb675b324"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/properties-of-carbon/carbon/", "id": "carbon", "hide": false, "title": "Carbon", "child_data": [{"kind": "Video", "id": "x6f46b5d3"}, {"kind": "Video", "id": "x1277076f"}, {"kind": "Article", "id": "xe0c2ee1b"}, {"kind": "Video", "id": "2600599"}], "children": [{"path": "khan/science/biology/properties-of-carbon/carbon/carbon-as-a-building-block-of-life/", "id": "JgYlogdtJDo", "title": "Carbon as a building block of life", "kind": "Video", "description": "Carbon as a building block of life.", "slug": "carbon-as-a-building-block-of-life"}, {"path": "khan/science/biology/properties-of-carbon/carbon/silicon-based-life/", "id": "FbP9nUrtKto", "title": "Silicon-based life", "kind": "Video", "description": "Could silicon play a role similar to carbon's in supporting life?", "slug": "silicon-based-life"}, {"path": "khan/science/biology/properties-of-carbon/carbon/representing-structures-of-organic-molecules/", "id": "pMoA65Dj-zk", "title": "Representing structures of organic molecules", "kind": "Video", "description": "Representing Structures of Organic Molecules", "slug": "representing-structures-of-organic-molecules"}], "in_knowledge_map": false, "description": "Learn why carbon is a fantastic building block for biological molecules! We'll look at carbon's atomic structure and ability to form bonds...and as a special bonus, we'll investigate the possibility of silicon-based life forms.", "node_slug": "carbon", "render_type": "Tutorial", "topic_page_url": "/science/biology/properties-of-carbon/carbon", "extended_slug": "science/biology/properties-of-carbon/carbon", "kind": "Topic", "slug": "carbon"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/properties-of-carbon/hydrocarbon-structures-and-functional-groups/", "id": "hydrocarbon-structures-and-functional-groups", "hide": false, "title": "Hydrocarbon structures and functional groups", "child_data": [{"kind": "Video", "id": "xd0e192da"}, {"kind": "Video", "id": "x0162d06a"}, {"kind": "Article", "id": "x062b9484"}, {"kind": "Video", "id": "x7d3ab1b9"}, {"kind": "Article", "id": "x3f71bd2d"}], "children": [{"path": "khan/science/biology/properties-of-carbon/hydrocarbon-structures-and-functional-groups/hydrocarbon-overview/", "id": "oPqq3Ex6viM", "title": "Hydrocarbon overview", "kind": "Video", "description": "Hydrocarbon overview", "slug": "hydrocarbon-overview"}, {"path": "khan/science/biology/properties-of-carbon/hydrocarbon-structures-and-functional-groups/isomers/", "id": "z8M4EciPpYI", "title": "Isomers", "kind": "Video", "description": "Structural isomers, stereoisomers, geometric isomers, cis-trans isomers, and enantiomers.", "slug": "isomers"}, {"path": "khan/science/biology/properties-of-carbon/hydrocarbon-structures-and-functional-groups/functional-groups/", "id": "iuaYuCreEPk", "title": "Functional groups", "kind": "Video", "description": "Hydroxyl, sulfhydryl, carbonyl, carboxyl, amino and phosphate groups. Alcohols and thiols.", "slug": "functional-groups"}], "in_knowledge_map": false, "description": "Carbon-containing molecules come in many shapes, sizes and types. Here, get an overview of different hydrocarbon structures, learn about isomers (molecules with the same atoms arranged in different ways), and check out some of the key functional groups found in biological molecules.", "node_slug": "hydrocarbon-structures-and-functional-groups", "render_type": "Tutorial", "topic_page_url": "/science/biology/properties-of-carbon/hydrocarbon-structures-and-functional-groups", "extended_slug": "science/biology/properties-of-carbon/hydrocarbon-structures-and-functional-groups", "kind": "Topic", "slug": "hydrocarbon-structures-and-functional-groups"}], "in_knowledge_map": false, "description": "Did you know that your body is approximately 18% carbon? Learn more about carbon and why it makes a great building block for biological molecules. We'll look at the bonding properties of carbon, the structures of hydrocarbons, different types of isomerism, and some functional groups important in biology.", "node_slug": "properties-of-carbon", "render_type": "Topic", "topic_page_url": "/science/biology/properties-of-carbon", "extended_slug": "science/biology/properties-of-carbon", "kind": "Topic", "slug": "properties-of-carbon"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/biology/macromolecules/", "id": "macromolecules", "hide": false, "title": "Macromolecules", "child_data": [{"kind": "Topic", "id": "xc4637d20"}, {"kind": "Topic", "id": "xe196e0e4"}, {"kind": "Topic", "id": "xea21d39f"}, {"kind": "Topic", "id": "xe5736f54"}, {"kind": "Topic", "id": "x79f26fbb"}, {"kind": "Topic", "id": "x19e50097"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/science/biology/macromolecules/macromolecules-skill-checks/", "id": "macromolecules-skill-checks", "hide": false, "title": "Macromolecules skill check", "child_data": [{"kind": "Exercise", "id": "x952c07ec"}], "children": [{"path": "khan/science/biology/macromolecules/macromolecules-skill-checks/macromolecules-skill-assessment/", "id": "macromolecules-skill-assessment", "title": "Skill check: Macromolecules", "description": "Check your understanding of the different types of macromolecules!", "slug": "macromolecules-skill-assessment", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Check your understanding of large biological molecules!", "node_slug": "macromolecules-skill-checks", "render_type": "Tutorial", "topic_page_url": "/science/biology/macromolecules/macromolecules-skill-checks", "extended_slug": "science/biology/macromolecules/macromolecules-skill-checks", "kind": "Topic", "slug": "macromolecules-skill-checks"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/macromolecules/carbohydrates-and-sugars/", "id": "carbohydrates-and-sugars", "hide": false, "title": "Carbohydrates", "child_data": [{"kind": "Video", "id": "x66379952"}, {"kind": "Video", "id": "xc324ac4d"}, {"kind": "Video", "id": "x5ff00476"}, {"kind": "Video", "id": "x6fc25ec1"}, {"kind": "Article", "id": "x821b7449"}], "children": [{"path": "khan/science/biology/macromolecules/carbohydrates-and-sugars/molecular-structure-of-glucose/", "id": "-Aj5BTnz-v0", "title": "Molecular structure of glucose", "kind": "Video", "description": "Molecular structure of glucose. Monosaccharide structure. Linear and ring forms.", "slug": "molecular-structure-of-glucose"}, {"path": "khan/science/biology/macromolecules/carbohydrates-and-sugars/dehydration-synthesis-or-a-condensation-reaction/", "id": "FEAXI5XeJ4M", "title": "Dehydration synthesis or a condensation reaction", "kind": "Video", "description": "Dehydration synthesis (condensation reaction) between sugar molecules. Monosaccharides, disaccharides, and polysaccharides. Formation of maltose from glucose monomers.", "slug": "dehydration-synthesis-or-a-condensation-reaction"}, {"path": "khan/science/biology/macromolecules/carbohydrates-and-sugars/hydrolysis/", "id": "SOQyiM6V3RQ", "title": "Hydrolysis", "kind": "Video", "description": "How hydrolysis can break down polysaccharides (carbohydrates) like starch, cellulose, chitin and glycogen.", "slug": "hydrolysis"}, {"path": "khan/science/biology/macromolecules/carbohydrates-and-sugars/molecular-structure-of-fructose/", "id": "662koqcIXSk", "title": "Molecular structure of fructose", "kind": "Video", "description": "Fructose in comparison with glucose. Pyranose and furanose rings. Sucrose made from glucose and fructose.", "slug": "molecular-structure-of-fructose"}], "in_knowledge_map": false, "description": "Do you have a sweet tooth? Learn more about different types of sugar molecules: their structure, their chemical behavior, and how they can combine to form chains. Starring glucose (blood sugar), sucrose (table sugar), and fructose (fruit sugar).", "node_slug": "carbohydrates-and-sugars", "render_type": "Tutorial", "topic_page_url": "/science/biology/macromolecules/carbohydrates-and-sugars", "extended_slug": "science/biology/macromolecules/carbohydrates-and-sugars", "kind": "Topic", "slug": "carbohydrates-and-sugars"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/macromolecules/lipids/", "id": "lipids", "hide": false, "title": "Lipids", "child_data": [{"kind": "Video", "id": "x989f9684"}, {"kind": "Video", "id": "xc3236192"}, {"kind": "Video", "id": "x3bc71445"}, {"kind": "Article", "id": "x78cd1fc4"}], "children": [{"path": "khan/science/biology/macromolecules/lipids/molecular-structure-of-triglycerides-fats/", "id": "OpyTJbzA7Fk", "title": "Molecular structure of triglycerides (fats)", "kind": "Video", "description": "Understanding how a triglyceride (triacylglycerol) can be formed from a glycerol molecule and three fatty acids.", "slug": "molecular-structure-of-triglycerides-fats"}, {"path": "khan/science/biology/macromolecules/lipids/saturated-fats-unsaturated-fats-and-trans-fats/", "id": "O9lL2KStW9s", "title": "Saturated fats, unsaturated fats, and trans fats", "kind": "Video", "description": "Saturated fats, unsaturated fats, and trans fats", "slug": "saturated-fats-unsaturated-fats-and-trans-fats"}, {"path": "khan/science/biology/macromolecules/lipids/lipid-overview/", "id": "Ezp8F7XJHWE", "title": "Lipid overview", "kind": "Video", "description": "Types of lipids including fats, waxes, steroids and phospholipids.", "slug": "lipid-overview"}], "in_knowledge_map": false, "description": "Did you know that fats are beautiful little molecules with long, trailing hydrocarbon tails? Learn about the structure and function of fats and other lipids, including cholesterol and the phospholipids that make up cell membranes.", "node_slug": "lipids", "render_type": "Tutorial", "topic_page_url": "/science/biology/macromolecules/lipids", "extended_slug": "science/biology/macromolecules/lipids", "kind": "Topic", "slug": "lipids"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/macromolecules/nucleic-acids/", "id": "nucleic-acids", "hide": false, "title": "Nucleic acids", "child_data": [{"kind": "Video", "id": "x983f0c01"}, {"kind": "Video", "id": "x4626c3c0"}, {"kind": "Video", "id": "x5f5151df"}, {"kind": "Video", "id": "xb0f3c430"}, {"kind": "Video", "id": "x44533ed0"}, {"kind": "Article", "id": "xe1ba0d74"}], "children": [{"path": "khan/science/biology/macromolecules/nucleic-acids/dna-deoxyribonucleic-acid/", "id": "AmOO4j0E408", "title": "DNA", "kind": "Video", "slug": "dna-deoxyribonucleic-acid"}, {"path": "khan/science/biology/macromolecules/nucleic-acids/rna-transcription-and-translation/", "id": "6gUY5NoX1Lk", "title": "DNA replication and RNA transcription and translation", "kind": "Video", "slug": "rna-transcription-and-translation"}, {"path": "khan/science/biology/macromolecules/nucleic-acids/molecular-structure-of-dna/", "id": "L677-Fl0joY", "title": "Molecular structure of DNA", "kind": "Video", "description": "Molecular structure of DNA. Nucleotide. Nitrogenous base, phosphate.", "slug": "molecular-structure-of-dna"}, {"path": "khan/science/biology/macromolecules/nucleic-acids/antiparallel-structure-of-dna-strands/", "id": "0CQ5ls3Uc2Q", "title": "Antiparallel structure of DNA strands", "kind": "Video", "description": "Antiparallel structure of DNA strands (5' - 3' directionality)", "slug": "antiparallel-structure-of-dna-strands"}, {"path": "khan/science/biology/macromolecules/nucleic-acids/molecular-structure-of-rna/", "id": "jUUJSOM1ihU", "title": "Molecular structure of RNA", "kind": "Video", "description": "Molecular structure of RNA", "slug": "molecular-structure-of-rna"}], "in_knowledge_map": false, "description": "Maybe you've heard DNA discussed as the \"genetic material.\" But what exactly is DNA, when you get right down to it? Learn more about the structure and properties of DNA and its nucleic acid cousin, RNA.", "node_slug": "nucleic-acids", "render_type": "Tutorial", "topic_page_url": "/science/biology/macromolecules/nucleic-acids", "extended_slug": "science/biology/macromolecules/nucleic-acids", "kind": "Topic", "slug": "nucleic-acids"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/macromolecules/proteins-and-amino-acids/", "id": "proteins-and-amino-acids", "hide": false, "title": "Proteins", "child_data": [{"kind": "Video", "id": "xe81203a5"}, {"kind": "Video", "id": "x5688e56e"}, {"kind": "Article", "id": "x925496e8"}, {"kind": "Video", "id": "x3759e606"}, {"kind": "Video", "id": "x1cc9afc4"}, {"kind": "Article", "id": "xd52398ad"}], "children": [{"path": "khan/science/biology/macromolecules/proteins-and-amino-acids/introduction-to-amino-acids/", "id": "Pk4d9lY48GI", "title": "Introduction to amino acids", "kind": "Video", "description": "Understanding amino acids and their role in the Central Dogma of Molecular Biology (how the information in DNA eventually gets expressed as chains of amino acids). Thinking about the amino and carboxyl groups and how amino acids are typically found as zwitterions at physiological pH. How amino acid side chains can impact protein structure.", "slug": "introduction-to-amino-acids"}, {"path": "khan/science/biology/macromolecules/proteins-and-amino-acids/peptide-bond-formation/", "id": "nv2kfBFkv4s", "title": "Peptide bond formation", "kind": "Video", "description": "How amino acids (including ones in zwitterion form) form peptide bonds (peptide linkages) through a condensation reaction (dehydration synthesis).", "slug": "peptide-bond-formation"}, {"path": "khan/science/biology/macromolecules/proteins-and-amino-acids/overview-of-protein-structure/", "id": "MODnIkQvyz0", "title": "Overview of protein structure", "kind": "Video", "description": "Primary, secondary, tertiary and quaternary protein structure. Thinking about how the different factors impacting a protein's structure. Beta pleated sheets. Alpha helices.", "slug": "overview-of-protein-structure"}, {"path": "khan/science/biology/macromolecules/proteins-and-amino-acids/tertiary-structure-of-proteins/", "id": "7udSVZ7bDb8", "title": "Tertiary structure of proteins", "kind": "Video", "description": "How side chain interactions can impact the tertiary structure of proteins.", "slug": "tertiary-structure-of-proteins"}], "in_knowledge_map": false, "description": "Proteins: the amazing machines of the cell! Learn about the amino acids that proteins are made of and how they are connected by peptide bonds. Special bonus: learn how proteins get their shapes and why this so important for their function.", "node_slug": "proteins-and-amino-acids", "render_type": "Tutorial", "topic_page_url": "/science/biology/macromolecules/proteins-and-amino-acids", "extended_slug": "science/biology/macromolecules/proteins-and-amino-acids", "kind": "Topic", "slug": "proteins-and-amino-acids"}], "in_knowledge_map": false, "description": "There's an old saying, \"You are what you eat.\" In some senses, this is literally true! When we eat food, we take in the large biological molecules found in the food, including carbohydrates, proteins, lipids (such as fats), and nucleic acids (such as DNA). Dive into the different types of macromolecules, what they are made up of, and how they are built up and broken down.", "node_slug": "macromolecules", "render_type": "Topic", "topic_page_url": "/science/biology/macromolecules", "extended_slug": "science/biology/macromolecules", "kind": "Topic", "slug": "macromolecules"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/biology/structure-of-a-cell/", "id": "structure-of-a-cell", "hide": false, "title": "Structure of a cell", "child_data": [{"kind": "Topic", "id": "x398f2a19"}, {"kind": "Topic", "id": "x04712a06"}, {"kind": "Topic", "id": "xffccc54b"}, {"kind": "Topic", "id": "x78131644"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/structure-of-a-cell/introduction-to-cells/", "id": "introduction-to-cells", "hide": false, "title": "Introduction to cells", "child_data": [{"kind": "Video", "id": "x0086be61"}, {"kind": "Video", "id": "x7771d81a"}, {"kind": "Article", "id": "xe048fa79"}, {"kind": "Article", "id": "x84401517"}], "children": [{"path": "khan/science/biology/structure-of-a-cell/introduction-to-cells/scale-of-cells/", "id": "xKJ3txXIuQk", "title": "Scale of cells", "kind": "Video", "description": "Thinking about how large a cell is compared to viruses, proteins and simple molecules.", "slug": "scale-of-cells"}, {"path": "khan/science/biology/structure-of-a-cell/introduction-to-cells/cell-theory/", "id": "zk3vlhz1b6k", "title": "Cell theory", "kind": "Video", "description": "Introduction to cell theory--the idea that 1) all living things are made of one or more cells, 2) cells are the basic unit of life and 3) all cells come from other cells. Explore the roles that Hooke, Leeuwenhoek and others played in developing cell theory.", "slug": "cell-theory"}], "in_knowledge_map": false, "description": "Start your cellular journey the right way: with some history and some microscopy! Here, we'll learn more about how cells were discovered, how they can be observed, and how big they are in comparison to other very small things.", "node_slug": "introduction-to-cells", "render_type": "Tutorial", "topic_page_url": "/science/biology/structure-of-a-cell/introduction-to-cells", "extended_slug": "science/biology/structure-of-a-cell/introduction-to-cells", "kind": "Topic", "slug": "introduction-to-cells"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/structure-of-a-cell/prokaryotic-and-eukaryotic-cells/", "id": "prokaryotic-and-eukaryotic-cells", "hide": false, "title": "Prokaryotic and eukaryotic cells", "child_data": [{"kind": "Video", "id": "xffe5513f"}, {"kind": "Video", "id": "xed3c4701"}, {"kind": "Article", "id": "x11587da4"}, {"kind": "Article", "id": "x90bd2fb1"}, {"kind": "Article", "id": "x89a5201a"}, {"kind": "Article", "id": "x29ca0466"}], "children": [{"path": "khan/science/biology/structure-of-a-cell/prokaryotic-and-eukaryotic-cells/cell-size/", "id": "6xx5v3PKZZM", "title": "Cell size", "kind": "Video", "description": "Thinking about the limiting factors of cell size. Focus on volume to surface area ratio.", "slug": "cell-size"}, {"path": "khan/science/biology/structure-of-a-cell/prokaryotic-and-eukaryotic-cells/prokaryotic-and-eukaryotic-cells/", "id": "xTnNv7YplSo", "title": "Prokaryotic and eukaryotic cells", "kind": "Video", "description": "Prokaryotic and eukaryotic cells. Bacteria and archaea.", "slug": "prokaryotic-and-eukaryotic-cells"}], "in_knowledge_map": false, "description": "Here's a question: what's the difference between you and a bacterium? Probably quite a lot of things! At the cellular level, though, some of the key differences include a cell nucleus and membrane-bound organelles, which you have (and the bacterium lacks). Here, we'll look in detail at the differences between prokaryotes and eukaryotes.", "node_slug": "prokaryotic-and-eukaryotic-cells", "render_type": "Tutorial", "topic_page_url": "/science/biology/structure-of-a-cell/prokaryotic-and-eukaryotic-cells", "extended_slug": "science/biology/structure-of-a-cell/prokaryotic-and-eukaryotic-cells", "kind": "Topic", "slug": "prokaryotic-and-eukaryotic-cells"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/structure-of-a-cell/tour-of-organelles/", "id": "tour-of-organelles", "hide": false, "title": "Tour of a eukaryotic cell", "child_data": [{"kind": "Video", "id": "x3b506ff8"}, {"kind": "Video", "id": "xa41115fb"}, {"kind": "Article", "id": "x89914330"}, {"kind": "Video", "id": "x7d4cfad5"}, {"kind": "Article", "id": "x9edc13c7"}, {"kind": "Video", "id": "xd96ae2b8"}, {"kind": "Article", "id": "x1baa8949"}], "children": [{"path": "khan/science/biology/structure-of-a-cell/tour-of-organelles/endoplasmic-reticulum-and-golgi-bodies/", "id": "6UqtgH_Zy1Y", "title": "Endoplasmic reticulum and Golgi bodies", "kind": "Video", "description": "Structure of the endoplasmic reticulum and Golgi body (Golgi apparatus), and how they function in secretion of proteins from the cell.", "slug": "endoplasmic-reticulum-and-golgi-bodies"}, {"path": "khan/science/biology/structure-of-a-cell/tour-of-organelles/endomembrane-system/", "id": "vC-cEWJxDRY", "title": "Endomembrane system", "kind": "Video", "description": "An overview of how the cellular membrane, nuclear membranes, endoplasmic reticulum, Golgi apparatus and other membrane-bound structures collectively form the endomembrane system in eukaryotic cells.", "slug": "endomembrane-system"}, {"path": "khan/science/biology/structure-of-a-cell/tour-of-organelles/mitochondria-video/", "id": "i1dAnpSFbyI", "title": "Mitochondria", "kind": "Video", "description": "The structure and role of mitochondria (plural for mitochondrion). Discusses the outer membrane, inner membrane, cristae, porins, etc.", "slug": "mitochondria-video"}, {"path": "khan/science/biology/structure-of-a-cell/tour-of-organelles/cytoskeletons/", "id": "4BAGI6LbHeo", "title": "The cytoskeleton", "kind": "Video", "description": "Exploring the cell cytoskeleton, including microfilaments and microtubules (with a brief mention of intermediate filaments).", "slug": "cytoskeletons"}], "in_knowledge_map": false, "description": "Join us on a voyage through some of the specialized compartments and structures of eukaryotic cells. From the rolling folds of the endoplasmic reticulum to the majestic fibers of the microtubule cytoskeleton, it's a trip you won't regret!", "node_slug": "tour-of-organelles", "render_type": "Tutorial", "topic_page_url": "/science/biology/structure-of-a-cell/tour-of-organelles", "extended_slug": "science/biology/structure-of-a-cell/tour-of-organelles", "kind": "Topic", "slug": "tour-of-organelles"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/structure-of-a-cell/cytoskeleton-junctions-and-extracellular-structures/", "id": "cytoskeleton-junctions-and-extracellular-structures", "hide": false, "title": "Extracellular structures and cell-cell junctions", "child_data": [{"kind": "Video", "id": "x5c4ff82c"}, {"kind": "Video", "id": "x927ae556"}, {"kind": "Article", "id": "x52846fcc"}, {"kind": "Article", "id": "x81844c6c"}, {"kind": "Video", "id": "x0e8b1264"}], "children": [{"path": "khan/science/biology/structure-of-a-cell/cytoskeleton-junctions-and-extracellular-structures/extracellular-matrix/", "id": "cMNx17H3dRU", "title": "Extracellular matrix", "kind": "Video", "description": "Overview of how cells interact with the extracellular matrix.", "slug": "extracellular-matrix"}, {"path": "khan/science/biology/structure-of-a-cell/cytoskeleton-junctions-and-extracellular-structures/plant-cell-walls/", "id": "zdvKhaQxvag", "title": "Plant cell walls", "kind": "Video", "description": "Understanding the structure of plant cell walls.", "slug": "plant-cell-walls"}, {"path": "khan/science/biology/structure-of-a-cell/cytoskeleton-junctions-and-extracellular-structures/overview-of-animal-and-plant-cells/", "id": "24YMQ9GvLss", "title": "Overview of animal and plant cells", "kind": "Video", "description": "Overview of animal and plant cells. Topics include cell walls, vacuoles, chloroplasts, peroxisomes, lysosomes, mitochondria, etc.", "slug": "overview-of-animal-and-plant-cells"}], "in_knowledge_map": false, "description": "We've spent a lot of time looking at what's inside a cell. But what about the stuff on the outside? Here, we'll look at the extracellular matrix of animal cells and the cell wall of plant cells, as well as the junctions that hold cells together.", "node_slug": "cytoskeleton-junctions-and-extracellular-structures", "render_type": "Tutorial", "topic_page_url": "/science/biology/structure-of-a-cell/cytoskeleton-junctions-and-extracellular-structures", "extended_slug": "science/biology/structure-of-a-cell/cytoskeleton-junctions-and-extracellular-structures", "kind": "Topic", "slug": "cytoskeleton-junctions-and-extracellular-structures"}], "in_knowledge_map": false, "description": "You, my friend, are made up of cells. Lots and lots of them. Some of them are eukaryotic (human), but many more of them are prokaryotic, thanks to the friendly bacteria of your gut, skin, and other body systems. Jump in to learn more about prokaryotic and eukaryotic cells and the complex and beautiful structures inside of them.", "node_slug": "structure-of-a-cell", "render_type": "Topic", "topic_page_url": "/science/biology/structure-of-a-cell", "extended_slug": "science/biology/structure-of-a-cell", "kind": "Topic", "slug": "structure-of-a-cell"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/biology/membranes-and-transport/", "id": "membranes-and-transport", "hide": false, "title": "Membranes and transport", "child_data": [{"kind": "Topic", "id": "x18a614db"}, {"kind": "Topic", "id": "x3a8a4521"}, {"kind": "Topic", "id": "xc1e8e4f3"}, {"kind": "Topic", "id": "x421aa921"}, {"kind": "Topic", "id": "x3be6cdbd"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/membranes-and-transport/the-plasma-membrane/", "id": "the-plasma-membrane", "hide": false, "title": "The plasma membrane", "child_data": [{"kind": "Video", "id": "x0c4fbd1d"}, {"kind": "Article", "id": "x64ef7c23"}], "children": [{"path": "khan/science/biology/membranes-and-transport/the-plasma-membrane/fluid-mosaic-model-of-cell-membranes/", "id": "cP8iQu57dQo", "title": "Fluid mosaic model of cell membranes", "kind": "Video", "description": "Fluid mosaic model of cell membranes; the role of phospholipids, proteins, glycoproteins, cholesterol, and glycolipids in cell membranes.", "slug": "fluid-mosaic-model-of-cell-membranes"}], "in_knowledge_map": false, "description": "Learn about the amazing and versatile barrier that surrounds all of your cells: the plasma membrane!", "node_slug": "the-plasma-membrane", "render_type": "Tutorial", "topic_page_url": "/science/biology/membranes-and-transport/the-plasma-membrane", "extended_slug": "science/biology/membranes-and-transport/the-plasma-membrane", "kind": "Topic", "slug": "the-plasma-membrane"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/membranes-and-transport/diffusion-and-osmosis/", "id": "diffusion-and-osmosis", "hide": false, "title": "Diffusion and osmosis", "child_data": [{"kind": "Video", "id": "x74ff3c38"}, {"kind": "Video", "id": "x094bd875"}, {"kind": "Video", "id": "xc57249c4"}, {"kind": "Video", "id": "xf9dc3289"}, {"kind": "Article", "id": "x34be2825"}, {"kind": "Video", "id": "23984"}], "children": [{"path": "khan/science/biology/membranes-and-transport/diffusion-and-osmosis/diffusion-video/", "id": "a_Y9wBQ610o", "title": "Diffusion", "kind": "Video", "description": "Understanding how particles passively diffuse down their concentration gradient.", "slug": "diffusion-video"}, {"path": "khan/science/biology/membranes-and-transport/diffusion-and-osmosis/concentration-gradients/", "id": "CNP-dCQ-Cmg", "title": "Concentration gradients", "kind": "Video", "description": "Example showing how two different types of particles can move down their concentration gradients in opposite directions.", "slug": "concentration-gradients"}, {"path": "khan/science/biology/membranes-and-transport/diffusion-and-osmosis/osmosis/", "id": "rCNlG_j_gSM", "title": "Osmosis", "kind": "Video", "description": "Osmosis of water (or any solvent) from area of lower solute concentration to areas of higher solute concentration through a semipermeable membrane.", "slug": "osmosis"}, {"path": "khan/science/biology/membranes-and-transport/diffusion-and-osmosis/hypotonic-isotonic-and-hypertonic-solutions-tonicity/", "id": "afWnU10ZNfg", "title": "Hypotonic, isotonic, and hypertonic solutions (tonicity)", "kind": "Video", "description": "Hypotonic, isotonic and hypertonic solutions (tonicity). Seeing the effect of various types of solution on the direction of osmosis.", "slug": "hypotonic-isotonic-and-hypertonic-solutions-tonicity"}, {"path": "khan/science/biology/membranes-and-transport/diffusion-and-osmosis/diffusion-and-osmosis/", "id": "aubZU0iWtgI", "title": "Diffusion and osmosis", "kind": "Video", "description": "Learn about diffusion, osmosis, and concentration gradients and why these are important to cells.", "slug": "diffusion-and-osmosis"}], "in_knowledge_map": false, "description": "Ever wonder why plants wilt if you don't water them? Find out here, and learn more about the basic principles of probability that underlie movement of water and other molecules in biological systems.", "node_slug": "diffusion-and-osmosis", "render_type": "Tutorial", "topic_page_url": "/science/biology/membranes-and-transport/diffusion-and-osmosis", "extended_slug": "science/biology/membranes-and-transport/diffusion-and-osmosis", "kind": "Topic", "slug": "diffusion-and-osmosis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/membranes-and-transport/passive-transport/", "id": "passive-transport", "hide": false, "title": "Passive transport", "child_data": [{"kind": "Video", "id": "x6525e15d"}, {"kind": "Video", "id": "x32334dc8"}, {"kind": "Article", "id": "x22649e6f"}], "children": [{"path": "khan/science/biology/membranes-and-transport/passive-transport/passive-transport-and-selective-permeability/", "id": "jQN07Hvq6WI", "title": "Passive transport and selective permeability", "kind": "Video", "description": "Passive transport and selective permeability. Passive transport through diffusion.", "slug": "passive-transport-and-selective-permeability"}, {"path": "khan/science/biology/membranes-and-transport/passive-transport/facilitated-diffusion/", "id": "8HlVy__J8XA", "title": "Facilitated diffusion", "kind": "Video", "description": "Understanding how channel proteins and carrier proteins can facilitate diffusion across a cell membrane (passive transport).", "slug": "facilitated-diffusion"}], "in_knowledge_map": false, "description": "Sometimes it pays to go with the flow! Learn about passive transport mechanisms, in which molecules travel across the plasma membrane by moving down their concentration gradients (no energy expenditure required).", "node_slug": "passive-transport", "render_type": "Tutorial", "topic_page_url": "/science/biology/membranes-and-transport/passive-transport", "extended_slug": "science/biology/membranes-and-transport/passive-transport", "kind": "Topic", "slug": "passive-transport"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/membranes-and-transport/active-transport/", "id": "active-transport", "hide": false, "title": "Active transport", "child_data": [{"kind": "Video", "id": "x9c826aa6"}, {"kind": "Video", "id": "xcf4785aa"}, {"kind": "Video", "id": "x94a43831"}, {"kind": "Article", "id": "x3c9e0cee"}], "children": [{"path": "khan/science/biology/membranes-and-transport/active-transport/sodium-potassium-pump-video/", "id": "vh166DKxYiM", "title": "Sodium potassium pump", "kind": "Video", "description": "How the sodium potassium pump pumps sodium ions out while pumping potassium ions in (and the role this plays in establishing resting membrane potentials based on an electrochemical gradient)", "slug": "sodium-potassium-pump-video"}, {"path": "khan/science/biology/membranes-and-transport/active-transport/electrochemical-gradient-and-secondary-active-transport/", "id": "wbWL2wfvsM8", "title": "Electrochemical gradients and secondary active transport", "kind": "Video", "description": "Electrochemical gradient as a combination of chemical gradient (concentration gradient) and electrostatic potential; how a cell can use a molecule's electrochemical gradient to power secondary active transport in a symporter.", "slug": "electrochemical-gradient-and-secondary-active-transport"}, {"path": "khan/science/biology/membranes-and-transport/active-transport/uniporters-symporters-and-antiporters/", "id": "-aGYytZ7K7M", "title": "Uniporters, symporters and antiporters", "kind": "Video", "description": "A review of various forms of passive and active transport including facilitated diffusion (uniporters), symporters, and exchangers; a discussion of primary and secondary active transport.", "slug": "uniporters-symporters-and-antiporters"}], "in_knowledge_map": false, "description": "In active transport, the cell has to pay (often, in the form of ATP) to move molecules against their gradients. Learn more about the amazing protein machines that make this possible.", "node_slug": "active-transport", "render_type": "Tutorial", "topic_page_url": "/science/biology/membranes-and-transport/active-transport", "extended_slug": "science/biology/membranes-and-transport/active-transport", "kind": "Topic", "slug": "active-transport"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/membranes-and-transport/bulk-transport/", "id": "bulk-transport", "hide": false, "title": "Bulk transport", "child_data": [{"kind": "Video", "id": "xf31b726a"}, {"kind": "Video", "id": "xb8a748cc"}, {"kind": "Article", "id": "x53016340"}], "children": [{"path": "khan/science/biology/membranes-and-transport/bulk-transport/endocytosis-phagocytosis-and-pinocytosis/", "id": "QspmZf_yWyU", "title": "Endocytosis, phagocytosis, and pinocytosis", "kind": "Video", "description": "Bulk transport: endocytosis, phagocytosis, and pinocytosis.", "slug": "endocytosis-phagocytosis-and-pinocytosis"}, {"path": "khan/science/biology/membranes-and-transport/bulk-transport/exocytosis/", "id": "VOzV4d0HKis", "title": "Exocytosis", "kind": "Video", "description": "Introduction to exocytosis!", "slug": "exocytosis"}], "in_knowledge_map": false, "description": "Macrophages (specialized immune cells) in your body can \"eat\" bacteria, pulling them into the cell and digesting them. Learn how they accomplish this feat, and how cells transport other large molecules across the plasma membrane.", "node_slug": "bulk-transport", "render_type": "Tutorial", "topic_page_url": "/science/biology/membranes-and-transport/bulk-transport", "extended_slug": "science/biology/membranes-and-transport/bulk-transport", "kind": "Topic", "slug": "bulk-transport"}], "in_knowledge_map": false, "description": "How do the cells in your body define their boundaries (and control what comes in or goes out)? As it turns out, cells have a sophisticated and flexible barrier, the plasma membrane, and a wide array of strategies for transporting molecules in and out. Learn more about what the membrane's made of and how different types of molecules move across it.", "node_slug": "membranes-and-transport", "render_type": "Topic", "topic_page_url": "/science/biology/membranes-and-transport", "extended_slug": "science/biology/membranes-and-transport", "kind": "Topic", "slug": "membranes-and-transport"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/biology/energy-and-enzymes/", "id": "energy-and-enzymes", "hide": false, "title": "Energy and enzymes", "child_data": [{"kind": "Topic", "id": "x6f40b4b6"}, {"kind": "Topic", "id": "x435366d1"}, {"kind": "Topic", "id": "x197acca6"}, {"kind": "Topic", "id": "x744a6b6c"}, {"kind": "Topic", "id": "x716b982d"}, {"kind": "Topic", "id": "x79d15c3b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/energy-and-enzymes/energy-in-metabolism/", "id": "energy-in-metabolism", "hide": false, "title": "Energy in metabolism", "child_data": [{"kind": "Video", "id": "x6f1c22d2"}, {"kind": "Article", "id": "x33b428d0"}, {"kind": "Video", "id": "xad7ec6d2"}, {"kind": "Article", "id": "xd790a844"}], "children": [{"path": "khan/science/biology/energy-and-enzymes/energy-in-metabolism/introduction-to-metabolism-anabolism-and-catabolism/", "id": "KwNe9x0eChs", "title": "Introduction to metabolism: anabolism and catabolism", "kind": "Video", "description": "Introduction to metabolism: anabolism and catabolism", "slug": "introduction-to-metabolism-anabolism-and-catabolism"}, {"path": "khan/science/biology/energy-and-enzymes/energy-in-metabolism/introduction-to-energy/", "id": "qzvatDIDXwo", "title": "Introduction to energy", "kind": "Video", "description": "Introduction to energy: potential and kinetic energy. The law of conservation of energy.", "slug": "introduction-to-energy"}], "in_knowledge_map": false, "description": "Can you feel the energy flowing through your body? The answer may be no (unless you\u2019ve had something caffeinated recently), but it\u2019s true: energy is constantly being transformed in your body. Learn about different types of energy and how they\u2019re interconverted, and discover the metabolic \u201ctraffic\u201d that takes place in each of your cells.", "node_slug": "energy-in-metabolism", "render_type": "Tutorial", "topic_page_url": "/science/biology/energy-and-enzymes/energy-in-metabolism", "extended_slug": "science/biology/energy-and-enzymes/energy-in-metabolism", "kind": "Topic", "slug": "energy-in-metabolism"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/", "id": "the-laws-of-thermodynamics", "hide": false, "title": "Laws of thermodynamics", "child_data": [{"kind": "Video", "id": "x15363e45"}, {"kind": "Video", "id": "x84002b90"}, {"kind": "Video", "id": "x932d408d"}, {"kind": "Video", "id": "x618d2187"}, {"kind": "Video", "id": "x78208c62"}, {"kind": "Article", "id": "xd13d4c86"}], "children": [{"path": "khan/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/first-law-of-thermodynamics-introduction/", "id": "vny1qUaToHw", "title": "First Law of Thermodynamics introduction", "kind": "Video", "description": "The First Law of Thermodynamics: energy cannot be created or destroyed. It can only be transferred or converted from one form to another.", "slug": "first-law-of-thermodynamics-introduction"}, {"path": "khan/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/introduction-to-entropy/", "id": "Svvr5uF_FZ8", "title": "Introduction to entropy", "kind": "Video", "description": "Introduction to entropy, and how entropy relates to the number of possible states for a system.", "slug": "introduction-to-entropy"}, {"path": "khan/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/the-second-law-of-thermodynamics/", "id": "Vc8mmZTrNtI", "title": "Second Law of Thermodynamics", "kind": "Video", "description": "The Second Law of Thermodynamics: there can be no spontaneous transfer of heat from cold to hot.", "slug": "the-second-law-of-thermodynamics"}, {"path": "khan/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/second-law-of-thermodynamics-and-entropy/", "id": "axG9HuqViDY", "title": "Second Law of Thermodynamics and entropy", "kind": "Video", "description": "Second Law of Thermodynamics and entropy: the entropy of the universe constantly increases.", "slug": "second-law-of-thermodynamics-and-entropy"}, {"path": "khan/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/why-heat-increases-entropy/", "id": "cKAF1v5hJoE", "title": "Why heat increases entropy", "kind": "Video", "description": "Why heat increases entropy\u2014even though some of it can do work!", "slug": "why-heat-increases-entropy"}], "in_knowledge_map": false, "description": "Although it might be fun to be exempt from the laws of physics (flying, anyone?), it turns out that cells and organisms are in fact subject to these laws, just like any other type of matter. Learn more about the laws of thermodynamics and how they relate to energy transfers in biological systems.", "node_slug": "the-laws-of-thermodynamics", "render_type": "Tutorial", "topic_page_url": "/science/biology/energy-and-enzymes/the-laws-of-thermodynamics", "extended_slug": "science/biology/energy-and-enzymes/the-laws-of-thermodynamics", "kind": "Topic", "slug": "the-laws-of-thermodynamics"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/energy-and-enzymes/free-energy-tutorial/", "id": "free-energy-tutorial", "hide": false, "title": "Free energy", "child_data": [{"kind": "Video", "id": "xca9e7640"}, {"kind": "Video", "id": "xb760620c"}, {"kind": "Article", "id": "x3a491f69"}], "children": [{"path": "khan/science/biology/energy-and-enzymes/free-energy-tutorial/gibbs-free-energy-and-spontaneous-reactions/", "id": "CHHu-iTwHjg", "title": "Gibbs free energy and spontaneous reactions", "kind": "Video", "description": "Gibbs free energy and spontaneous reactions.", "slug": "gibbs-free-energy-and-spontaneous-reactions"}, {"path": "khan/science/biology/energy-and-enzymes/free-energy-tutorial/endergonic-exergonic-exothermic-and-endothermic-reactions/", "id": "J2L-X2sUigs", "title": "Endergonic, exergonic, exothermic, and endothermic reactions", "kind": "Video", "description": "Endergonic, exergonic, exothermic, and endothermic reactions.", "slug": "endergonic-exergonic-exothermic-and-endothermic-reactions"}], "in_knowledge_map": false, "description": "Unsure whether a chemical reaction will be spontaneous (take place without added energy)? Gibbs free energy to the rescue! Learn about the Gibbs free energy change (\u0394G) and how it can be used to predict reaction spontaneity.", "node_slug": "free-energy-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/biology/energy-and-enzymes/free-energy-tutorial", "extended_slug": "science/biology/energy-and-enzymes/free-energy-tutorial", "kind": "Topic", "slug": "free-energy-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/energy-and-enzymes/atp-reaction-coupling/", "id": "atp-reaction-coupling", "hide": false, "title": "ATP and reaction coupling", "child_data": [{"kind": "Video", "id": "xb7f05d8d"}, {"kind": "Video", "id": "x20655c75"}, {"kind": "Video", "id": "xf7bec56a"}, {"kind": "Article", "id": "x95fef348"}], "children": [{"path": "khan/science/biology/energy-and-enzymes/atp-reaction-coupling/adenosine-triphosphate/", "id": "PK6HmIe2EAg", "title": "ATP: Adenosine triphosphate", "kind": "Video", "description": "Learn more about ATP: how it stores energy, and how that energy is released when it's converted to ATP and phosphate.", "slug": "adenosine-triphosphate"}, {"path": "khan/science/biology/energy-and-enzymes/atp-reaction-coupling/atp-hydrolysis-mechanism/", "id": "-KE7jTXwNYs", "title": "ATP hydrolysis mechanism", "kind": "Video", "description": "ATP hydrolysis mechanism. How energy is released when ATP is converted to ADP and phosphate.", "slug": "atp-hydrolysis-mechanism"}, {"path": "khan/science/biology/energy-and-enzymes/atp-reaction-coupling/reaction-coupling-to-create-glucose-6-phosphate/", "id": "L8ifD4I1o38", "title": "Reaction coupling to create glucose 6 phosphate", "kind": "Video", "description": "Reaction coupling to create glucose 6 phosphate", "slug": "reaction-coupling-to-create-glucose-6-phosphate"}], "in_knowledge_map": false, "description": "You may have heard ATP described as the \u201cenergy currency\u201d of a cell. But what exactly does that mean? Learn more about how ATP stores energy and how its breakdown (hydrolysis) powers energy-requiring reactions in a cell.", "node_slug": "atp-reaction-coupling", "render_type": "Tutorial", "topic_page_url": "/science/biology/energy-and-enzymes/atp-reaction-coupling", "extended_slug": "science/biology/energy-and-enzymes/atp-reaction-coupling", "kind": "Topic", "slug": "atp-reaction-coupling"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/energy-and-enzymes/introduction-to-enzymes/", "id": "introduction-to-enzymes", "hide": false, "title": "Introduction to enzymes", "child_data": [{"kind": "Video", "id": "414004"}, {"kind": "Article", "id": "xd49c8b82"}, {"kind": "Video", "id": "x32f1ee82"}, {"kind": "Article", "id": "xcdc10236"}], "children": [{"path": "khan/science/biology/energy-and-enzymes/introduction-to-enzymes/introduction-to-kinetics/", "id": "__zy-oOLPug", "title": "Introduction to kinetics", "kind": "Video", "description": "Kinetics, activation energy, activated complex and catalysts.", "slug": "introduction-to-kinetics"}, {"path": "khan/science/biology/energy-and-enzymes/introduction-to-enzymes/enzymes/", "id": "A90HKrgUOg0", "title": "Enzymes", "kind": "Video", "description": "Enzymes as catalysts for reactions in biological systems; discussion of substrates, active sites, induced fit, and activation energy.", "slug": "enzymes"}], "in_knowledge_map": false, "description": "Every second of the day, tiny molecular machines called enzymes are working away busily inside your cells, catalyzing and directing the chemical reactions that keep you alive. Learn more about how enzymes speed up reactions and direct metabolic \u201ctraffic\u201d in cells.", "node_slug": "introduction-to-enzymes", "render_type": "Tutorial", "topic_page_url": "/science/biology/energy-and-enzymes/introduction-to-enzymes", "extended_slug": "science/biology/energy-and-enzymes/introduction-to-enzymes", "kind": "Topic", "slug": "introduction-to-enzymes"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/energy-and-enzymes/enzyme-regulation/", "id": "enzyme-regulation", "hide": false, "title": "Enzyme regulation", "child_data": [{"kind": "Video", "id": "xf9e84d4d"}, {"kind": "Video", "id": "x7fa5fd48"}, {"kind": "Video", "id": "xf7618e41"}, {"kind": "Article", "id": "xbb35f574"}, {"kind": "Article", "id": "x9deb6e86"}], "children": [{"path": "khan/science/biology/energy-and-enzymes/enzyme-regulation/enzyme-cofactors-and-coenzymes/", "id": "jYR0RlMft8Y", "title": "Enzyme cofactors and coenzymes", "kind": "Video", "description": "The cofactors and coenzymes (organic cofactors) that help enzymes catalyze reactions", "slug": "enzyme-cofactors-and-coenzymes"}, {"path": "khan/science/biology/energy-and-enzymes/enzyme-regulation/competitive-inhibition/", "id": "O23i38B2EmA", "title": "Competitive inhibition", "kind": "Video", "description": "Seeing how an inhibitor can \"compete\" for an enzyme with the intended substrate. This often happens at the active site, but the inhibitor could also bind at an allosteric site.", "slug": "competitive-inhibition"}, {"path": "khan/science/biology/energy-and-enzymes/enzyme-regulation/noncompetitive-inhibition/", "id": "4xOsAuj0QZg", "title": "Noncompetitive inhibition", "kind": "Video", "description": "Seeing how a noncompetitive inhibitor can bind whether or not the substrate is bound, and vice versa. It will often do this at an allosteric site, but may also bind at or near the active site.", "slug": "noncompetitive-inhibition"}], "in_knowledge_map": false, "description": "Enzymes may control chemical reactions, but what controls enzymes? As it turns out, enzymes can be turned \u201con\u201d or \u201coff\u201d by a wide range of molecules, some found normally in cells and others added from the outside. Learn about different types of enzyme regulators, which include nerve gas, HIV drugs, and the end products of metabolic pathways.", "node_slug": "enzyme-regulation", "render_type": "Tutorial", "topic_page_url": "/science/biology/energy-and-enzymes/enzyme-regulation", "extended_slug": "science/biology/energy-and-enzymes/enzyme-regulation", "kind": "Topic", "slug": "enzyme-regulation"}], "in_knowledge_map": false, "description": "You, like other living systems, are an amazing energy transformer. As you move your eyes to read these words, your body is busily converting chemical energy from your lunch into kinetic energy and thermal energy (heat). Learn more about how biological energy transfers work, as well as how protein machines called enzymes direct metabolic traffic through your cells.", "node_slug": "energy-and-enzymes", "render_type": "Topic", "topic_page_url": "/science/biology/energy-and-enzymes", "extended_slug": "science/biology/energy-and-enzymes", "kind": "Topic", "slug": "energy-and-enzymes"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/biology/cellular-respiration-and-fermentation/", "id": "cellular-respiration-and-fermentation", "hide": false, "title": "Cellular respiration", "child_data": [{"kind": "Topic", "id": "x345d7459"}, {"kind": "Topic", "id": "xf640e85a"}, {"kind": "Topic", "id": "x34b3b95c"}, {"kind": "Topic", "id": "xcc329dbb"}, {"kind": "Topic", "id": "x32339947"}, {"kind": "Topic", "id": "x0d5b94f4"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/", "id": "intro-to-cellular-respiration", "hide": false, "title": "Introduction to cellular respiration", "child_data": [{"kind": "Video", "id": "xb7f05d8d"}, {"kind": "Video", "id": "x20655c75"}, {"kind": "Video", "id": "23954"}, {"kind": "Video", "id": "23956"}, {"kind": "Video", "id": "23958"}, {"kind": "Article", "id": "x041c192c"}], "children": [{"path": "khan/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/adenosine-triphosphate/", "id": "PK6HmIe2EAg", "title": "ATP: Adenosine triphosphate", "kind": "Video", "description": "Learn more about ATP: how it stores energy, and how that energy is released when it's converted to ATP and phosphate.", "slug": "adenosine-triphosphate"}, {"path": "khan/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/atp-hydrolysis-mechanism/", "id": "-KE7jTXwNYs", "title": "ATP hydrolysis mechanism", "kind": "Video", "description": "ATP hydrolysis mechanism. How energy is released when ATP is converted to ADP and phosphate.", "slug": "atp-hydrolysis-mechanism"}, {"path": "khan/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/introduction-to-cellular-respiration/", "id": "2f7YwCtHcgk", "title": "Introduction to cellular respiration", "kind": "Video", "description": "Introduction to cellular respiration, including glycolysis, the Krebs Cycle, and the electron transport chain.", "slug": "introduction-to-cellular-respiration"}, {"path": "khan/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/oxidation-and-reduction-from-biological-view/", "id": "orI2m6IarJg", "title": "Oxidation and reduction review from biological point-of-view", "kind": "Video", "description": "Taking a looking at oxidation and reduction in a biological context.", "slug": "oxidation-and-reduction-from-biological-view"}, {"path": "khan/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/oxidation-and-reduction-in-cellular-respiration/", "id": "_KyyVhlUDNU", "title": "Oxidation and reduction in cellular respiration", "kind": "Video", "description": "Oxidation and reduction in cellular respiration. Reconciling the biology and chemistry definitions of oxidation and reduction.", "slug": "oxidation-and-reduction-in-cellular-respiration"}], "in_knowledge_map": false, "description": "How does your body get usable energy from the snack you just ate? Learn the basics of how cells extract energy from fuel molecules, including what redox reactions are and why they are important in the breakdown of fuels.", "node_slug": "intro-to-cellular-respiration", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration", "extended_slug": "science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration", "kind": "Topic", "slug": "intro-to-cellular-respiration"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/cellular-respiration-and-fermentation/overview-of-cellular-respiration-steps/", "id": "overview-of-cellular-respiration-steps", "hide": false, "title": "Steps of cellular respiration", "child_data": [{"kind": "Video", "id": "x19cf920e"}, {"kind": "Article", "id": "xaa980cbf"}], "children": [{"path": "khan/science/biology/cellular-respiration-and-fermentation/overview-of-cellular-respiration-steps/overview-of-cellular-respiration/", "id": "9zoS5WGsmpc", "title": "Overview of cellular respiration", "kind": "Video", "description": "Overview of cellular respiration. Includes glycolysis, pyruvate oxidation, the citric acid (Krebs) cycle, and oxidative phosphorylation.", "slug": "overview-of-cellular-respiration"}], "in_knowledge_map": false, "description": "Before you jump into the nitty-gritty details, get the big picture of cellular respiration. Learn about the different stages of this process and how they fit together.", "node_slug": "overview-of-cellular-respiration-steps", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-respiration-and-fermentation/overview-of-cellular-respiration-steps", "extended_slug": "science/biology/cellular-respiration-and-fermentation/overview-of-cellular-respiration-steps", "kind": "Topic", "slug": "overview-of-cellular-respiration-steps"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/cellular-respiration-and-fermentation/glycolysis/", "id": "glycolysis", "hide": false, "title": "Glycolysis", "child_data": [{"kind": "Video", "id": "23960"}, {"kind": "Video", "id": "x66a00a38"}, {"kind": "Article", "id": "x8fd3a7f9"}], "children": [{"path": "khan/science/biology/cellular-respiration-and-fermentation/glycolysis/glycolysis/", "id": "FE2jfTXAJHg", "title": "Overview of glycolysis", "kind": "Video", "description": "Overview of the basics of glycolysis.", "slug": "glycolysis"}, {"path": "khan/science/biology/cellular-respiration-and-fermentation/glycolysis/glycolysis-overview/", "id": "ArmlWtDnuys", "title": "Steps of glycolysis", "kind": "Video", "description": "Introduction to glycolysis. Role of glycolysis in producing ATPs and NADHs and converting glucose to pyruvates.", "slug": "glycolysis-overview"}], "in_knowledge_map": false, "description": "The name glycolysis means \"sugar-splitting,\" and sure enough, this metabolic pathway splits glucose into two three-carbon molecules. Learn more about the steps of glycolysis and how it is used in both cellular respiration and fermentation.", "node_slug": "glycolysis", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-respiration-and-fermentation/glycolysis", "extended_slug": "science/biology/cellular-respiration-and-fermentation/glycolysis", "kind": "Topic", "slug": "glycolysis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/cellular-respiration-and-fermentation/pyruvate-oxidation-and-the-citric-acid-cycle/", "id": "pyruvate-oxidation-and-the-citric-acid-cycle", "hide": false, "title": "Pyruvate oxidation and the citric acid cycle", "child_data": [{"kind": "Video", "id": "23962"}, {"kind": "Article", "id": "xcc1fcd22"}, {"kind": "Article", "id": "x4b0d5b00"}], "children": [{"path": "khan/science/biology/cellular-respiration-and-fermentation/pyruvate-oxidation-and-the-citric-acid-cycle/krebs-citric-acid-cycle/", "id": "juM2ROSLWfw", "title": "Krebs / citric acid cycle", "kind": "Video", "description": "Overview of the Krebs or Citric Acid Cycle", "slug": "krebs-citric-acid-cycle"}], "in_knowledge_map": false, "description": "Glycolysis can extract a bit of the energy from a glucose molecule, but the citric acid cycle can squeeze out much more. Learn about the steps of the cycle, how it harvests energy, and how it's fueled by acetyl CoA (produced by oxidation of pyruvate from glycolysis).", "node_slug": "pyruvate-oxidation-and-the-citric-acid-cycle", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-respiration-and-fermentation/pyruvate-oxidation-and-the-citric-acid-cycle", "extended_slug": "science/biology/cellular-respiration-and-fermentation/pyruvate-oxidation-and-the-citric-acid-cycle", "kind": "Topic", "slug": "pyruvate-oxidation-and-the-citric-acid-cycle"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/cellular-respiration-and-fermentation/oxidative-phosphorylation/", "id": "oxidative-phosphorylation", "hide": false, "title": "Oxidative phosphorylation", "child_data": [{"kind": "Video", "id": "x5769d931"}, {"kind": "Article", "id": "x72dc6bb8"}], "children": [{"path": "khan/science/biology/cellular-respiration-and-fermentation/oxidative-phosphorylation/oxidative-phosphorylation-and-the-electon-transport-chain/", "id": "J30zpvbmw7s", "title": "Oxidative phosphorylation and the electron transport chain", "kind": "Video", "description": "Exploring how the oxidation of co-enzymes like NADH to NAD+ can eventually lead to the production of ATP through oxidative phosphorylation and the electron transport chain.", "slug": "oxidative-phosphorylation-and-the-electon-transport-chain"}], "in_knowledge_map": false, "description": "Oxidative phosphorylation produces most of the ATP made in cellular respiration. Learn more about how oxidative phosphorylation uses electron transport to drive ATP synthesis.", "node_slug": "oxidative-phosphorylation", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-respiration-and-fermentation/oxidative-phosphorylation", "extended_slug": "science/biology/cellular-respiration-and-fermentation/oxidative-phosphorylation", "kind": "Topic", "slug": "oxidative-phosphorylation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/cellular-respiration-and-fermentation/variations-on-cellular-respiration/", "id": "variations-on-cellular-respiration", "hide": false, "title": "Variations on cellular respiration", "child_data": [{"kind": "Video", "id": "x5a5ece83"}, {"kind": "Video", "id": "xcc1b90e8"}, {"kind": "Article", "id": "xa2dc9884"}, {"kind": "Article", "id": "x259994ad"}, {"kind": "Article", "id": "x7052daa4"}], "children": [{"path": "khan/science/biology/cellular-respiration-and-fermentation/variations-on-cellular-respiration/lactic-acid-fermentation/", "id": "lfeXuK8pbFw", "title": "Lactic acid fermentation", "kind": "Video", "description": "Lactic acid fermentation. How organisms like lactobacillus convert pyruvic acid to lactic acid and oxidize NADH to NAD+ in the process.", "slug": "lactic-acid-fermentation"}, {"path": "khan/science/biology/cellular-respiration-and-fermentation/variations-on-cellular-respiration/alcohol-or-ethanol-fermentation/", "id": "D6mRPgvAEOc", "title": "Alcohol or ethanol fermentation", "kind": "Video", "description": "Alcohol or ethanol fermentation, including yeast and its role in bread and wine production.", "slug": "alcohol-or-ethanol-fermentation"}], "in_knowledge_map": false, "description": "There's more than one way to extract energy from a fuel molecule! Learn how cells break down fuels without oxygen, how non-glucose molecules can enter cellular respiration, and how cellular respiration is regulated.", "node_slug": "variations-on-cellular-respiration", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-respiration-and-fermentation/variations-on-cellular-respiration", "extended_slug": "science/biology/cellular-respiration-and-fermentation/variations-on-cellular-respiration", "kind": "Topic", "slug": "variations-on-cellular-respiration"}], "in_knowledge_map": false, "description": "How do your cells extract energy from the food that you eat? As it turns out, cells have a network of elegant metabolic pathways dedicated to just this task. Learn more about cellular respiration, fermentation, and other processes that extract energy from fuel molecules like glucose.", "node_slug": "cellular-respiration-and-fermentation", "render_type": "Topic", "topic_page_url": "/science/biology/cellular-respiration-and-fermentation", "extended_slug": "science/biology/cellular-respiration-and-fermentation", "kind": "Topic", "slug": "cellular-respiration-and-fermentation"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/biology/cellular-molecular-biology/", "id": "cellular-molecular-biology", "hide": false, "title": "Cellular and molecular biology", "child_data": [{"kind": "Topic", "id": "x16d45bd9"}, {"kind": "Topic", "id": "xd6fdbf47"}, {"kind": "Topic", "id": "x3ff5f508"}, {"kind": "Topic", "id": "xa2f2c1a6"}, {"kind": "Topic", "id": "xf73fecc9"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/cellular-molecular-biology/intro-to-cell-division/", "id": "intro-to-cell-division", "hide": false, "title": "Introduction to cell division", "child_data": [{"kind": "Video", "id": "x49fa677e"}, {"kind": "Video", "id": "x754b170b"}, {"kind": "Video", "id": "23928"}], "children": [{"path": "khan/science/biology/cellular-molecular-biology/intro-to-cell-division/fertilization-haploid-diploid-gamete-zygote-homologous/", "id": "dNp7vErqlaA", "title": "Fertilization terminology: gametes, zygotes, haploid and diploid", "kind": "Video", "slug": "fertilization-haploid-diploid-gamete-zygote-homologous"}, {"path": "khan/science/biology/cellular-molecular-biology/intro-to-cell-division/somatic-germ-cells/", "id": "PvoigrzODdE", "title": "Zygote differentiating into somatic and germ cells", "kind": "Video", "slug": "somatic-germ-cells"}, {"path": "khan/science/biology/cellular-molecular-biology/intro-to-cell-division/chromosomes-chromatids-chromatin-etc/", "id": "s9HPNwXd9fk", "title": "Chromosomes, chromatids, chromatin, etc.", "kind": "Video", "description": "The vocabulary of DNA: chromosomes, chromatids, chromatin, transcription, translation, and replication", "slug": "chromosomes-chromatids-chromatin-etc"}], "in_knowledge_map": false, "description": "", "node_slug": "intro-to-cell-division", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-molecular-biology/intro-to-cell-division", "extended_slug": "science/biology/cellular-molecular-biology/intro-to-cell-division", "kind": "Topic", "slug": "intro-to-cell-division"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/biology/cellular-molecular-biology/mitosis/", "id": "mitosis", "hide": false, "title": "Mitosis", "child_data": [{"kind": "Video", "id": "x78f186b2"}, {"kind": "Video", "id": "x385762f9"}, {"kind": "Article", "id": "xbdb45c62"}, {"kind": "Exercise", "id": "xf7725422"}, {"kind": "Article", "id": "x93dfd8ae"}], "children": [{"path": "khan/science/biology/cellular-molecular-biology/mitosis/interphase/", "id": "VXLSTd_dlKg", "title": "Interphase", "kind": "Video", "description": "Interphase of a cell's life cycle.", "slug": "interphase"}, {"path": "khan/science/biology/cellular-molecular-biology/mitosis/mitosis/", "id": "TKGcfbyFXsw", "title": "Mitosis", "kind": "Video", "description": "Phases of mitosis: prophase, metaphase, anaphase, telophase", "slug": "mitosis"}, {"path": "khan/science/biology/cellular-molecular-biology/mitosis/mitosis-questions/", "id": "mitosis-questions", "title": "Mitosis Questions", "description": "Use these questions to check your understanding of mitosis!", "slug": "mitosis-questions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "mitosis", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-molecular-biology/mitosis", "extended_slug": "science/biology/cellular-molecular-biology/mitosis", "kind": "Topic", "slug": "mitosis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/cellular-molecular-biology/meiosis/", "id": "meiosis", "hide": false, "title": "Meiosis", "child_data": [{"kind": "Video", "id": "x9d72f94c"}, {"kind": "Video", "id": "x1cc0f1a3"}, {"kind": "Video", "id": "x103b28b6"}, {"kind": "Video", "id": "xcc05c922"}], "children": [{"path": "khan/science/biology/cellular-molecular-biology/meiosis/comparing-mitosis-and-meiosis/", "id": "IQJ4DBkCnco", "title": "Comparing Mitosis and Meiosis", "kind": "Video", "description": "Comparing Mitosis and Meiosis", "slug": "comparing-mitosis-and-meiosis"}, {"path": "khan/science/biology/cellular-molecular-biology/meiosis/chromosomal-crossover-in-meiosis-i/", "id": "04gQ0bQu6xk", "title": "Chromosomal crossover in Meiosis I", "kind": "Video", "description": "Chromosomal crossover in Meiosis I", "slug": "chromosomal-crossover-in-meiosis-i"}, {"path": "khan/science/biology/cellular-molecular-biology/meiosis/phases-of-meiosis-i/", "id": "XGWL9jfPHJ8", "title": "Phases of Meiosis I", "kind": "Video", "description": "Phases of Meiosis I", "slug": "phases-of-meiosis-i"}, {"path": "khan/science/biology/cellular-molecular-biology/meiosis/phases-of-meiosis-ii/", "id": "mMCcBsSAlF4", "title": "Phases of Meiosis II", "kind": "Video", "description": "Phases of Meiosis II", "slug": "phases-of-meiosis-ii"}], "in_knowledge_map": false, "description": "", "node_slug": "meiosis", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-molecular-biology/meiosis", "extended_slug": "science/biology/cellular-molecular-biology/meiosis", "kind": "Topic", "slug": "meiosis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/cellular-molecular-biology/stem-cells-and-cancer/", "id": "stem-cells-and-cancer", "hide": false, "title": "Stem cells and cancer", "child_data": [{"kind": "Video", "id": "23936"}, {"kind": "Video", "id": "23938"}], "children": [{"path": "khan/science/biology/cellular-molecular-biology/stem-cells-and-cancer/embryonic-stem-cells/", "id": "-yCIMk1x0Pk", "title": "Embryonic stem cells", "kind": "Video", "description": "An overview of early development of a zygote to an embryo. Embryonic and somatic stem cells.", "slug": "embryonic-stem-cells"}, {"path": "khan/science/biology/cellular-molecular-biology/stem-cells-and-cancer/cancer/", "id": "RZhL7LDPk8w", "title": "Cancer", "kind": "Video", "description": "An introduction to what cancer is and how it is the by-product of broken DNA replication", "slug": "cancer"}], "in_knowledge_map": false, "description": "", "node_slug": "stem-cells-and-cancer", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-molecular-biology/stem-cells-and-cancer", "extended_slug": "science/biology/cellular-molecular-biology/stem-cells-and-cancer", "kind": "Topic", "slug": "stem-cells-and-cancer"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/cellular-molecular-biology/photosynthesis/", "id": "photosynthesis", "hide": false, "title": "Photosynthesis", "child_data": [{"kind": "Video", "id": "xb7f05d8d"}, {"kind": "Video", "id": "xaa3f87dd"}, {"kind": "Video", "id": "23968"}, {"kind": "Video", "id": "23970"}, {"kind": "Video", "id": "23972"}, {"kind": "Video", "id": "23974"}, {"kind": "Video", "id": "23976"}, {"kind": "Video", "id": "23978"}, {"kind": "Video", "id": "23980"}], "children": [{"path": "khan/science/biology/cellular-molecular-biology/photosynthesis/adenosine-triphosphate/", "id": "PK6HmIe2EAg", "title": "ATP: Adenosine triphosphate", "kind": "Video", "description": "Learn more about ATP: how it stores energy, and how that energy is released when it's converted to ATP and phosphate.", "slug": "adenosine-triphosphate"}, {"path": "khan/science/biology/cellular-molecular-biology/photosynthesis/atp-hydrolysis/", "id": "M-aktLHDZEA", "title": "ATP hydrolysis mechanism", "kind": "Video", "slug": "atp-hydrolysis"}, {"path": "khan/science/biology/cellular-molecular-biology/photosynthesis/photosynthesis/", "id": "-rsYk4eCKnA", "title": "Photosynthesis", "kind": "Video", "description": "Overview of photosynthesis", "slug": "photosynthesis"}, {"path": "khan/science/biology/cellular-molecular-biology/photosynthesis/photosynthesis-light-reactions-1/", "id": "GR2GA7chA_c", "title": "Photosynthesis: Light reactions 1", "kind": "Video", "description": "Details on the light-dependent reactions of photosynthesis", "slug": "photosynthesis-light-reactions-1"}, {"path": "khan/science/biology/cellular-molecular-biology/photosynthesis/photosynthesis-light-reactions-and-photophosphorylation/", "id": "yfR36PMWegg", "title": "Photosynthesis: Light reactions and photophosphorylation", "kind": "Video", "description": "More detail on the light reactions and photophosphorylation", "slug": "photosynthesis-light-reactions-and-photophosphorylation"}, {"path": "khan/science/biology/cellular-molecular-biology/photosynthesis/photosynthesis-calvin-cycle/", "id": "slm6D2VEXYs", "title": "Photosynthesis: Calvin cycle", "kind": "Video", "description": "The Calvin Cycle or the light-independent (dark) reactions of photosythesis", "slug": "photosynthesis-calvin-cycle"}, {"path": "khan/science/biology/cellular-molecular-biology/photosynthesis/photorespiration/", "id": "EQvTEFCANTM", "title": "Photorespiration", "kind": "Video", "description": "More detail on the Calvin Cycle and Photorespiration", "slug": "photorespiration"}, {"path": "khan/science/biology/cellular-molecular-biology/photosynthesis/c-4-photosynthesis/", "id": "7ynX_F-SwNY", "title": "C-4 photosynthesis", "kind": "Video", "description": "C-4 Photosynthesis: How some plants avoid photorespiration", "slug": "c-4-photosynthesis"}, {"path": "khan/science/biology/cellular-molecular-biology/photosynthesis/cam-plants/", "id": "xp6Zj24h8uA", "title": "Cam plants", "kind": "Video", "description": "How CAM Plants are able to fix carbon at night so they don't have to keep their stomata open during the day", "slug": "cam-plants"}], "in_knowledge_map": false, "description": "", "node_slug": "photosynthesis", "render_type": "Tutorial", "topic_page_url": "/science/biology/cellular-molecular-biology/photosynthesis", "extended_slug": "science/biology/cellular-molecular-biology/photosynthesis", "kind": "Topic", "slug": "photosynthesis"}], "in_knowledge_map": false, "description": "All living things, including you, are made up of cells. Find out how cells divide through mitosis and meiosis, as well as how they extract energy from sugars through cellular respiration (and harvest light energy through photosynthesis)!", "node_slug": "cellular-molecular-biology", "render_type": "Topic", "topic_page_url": "/science/biology/cellular-molecular-biology", "extended_slug": "science/biology/cellular-molecular-biology", "kind": "Topic", "slug": "cellular-molecular-biology"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/biology/her/", "id": "her", "hide": false, "title": "Heredity and evolution", "child_data": [{"kind": "Topic", "id": "x434de875"}, {"kind": "Topic", "id": "xd0849fdb"}, {"kind": "Topic", "id": "xef180f38"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/her/evolution-and-natural-selection/", "id": "evolution-and-natural-selection", "hide": false, "title": "Evolution and natural selection", "child_data": [{"kind": "Video", "id": "23916"}, {"kind": "Video", "id": "42120192"}, {"kind": "Video", "id": "23918"}, {"kind": "Video", "id": "23920"}, {"kind": "Video", "id": "23922"}, {"kind": "Video", "id": "23926"}], "children": [{"path": "khan/science/biology/her/evolution-and-natural-selection/introduction-to-evolution-and-natural-selection/", "id": "GcjgWov7mTM", "title": "Introduction to evolution and natural selection", "kind": "Video", "description": "Ape Clarification - that they have no tails", "slug": "introduction-to-evolution-and-natural-selection"}, {"path": "khan/science/biology/her/evolution-and-natural-selection/ape-clarification/", "id": "oFGkYA_diDA", "title": "Ape clarification", "kind": "Video", "description": "Ape Clarification - that they have no tails", "slug": "ape-clarification"}, {"path": "khan/science/biology/her/evolution-and-natural-selection/intelligent-design-and-evolution/", "id": "qxOEz9aPZNY", "title": "Intelligent design and evolution", "kind": "Video", "description": "The argument that evolution speaks to being the most \"intelligent design\"", "slug": "intelligent-design-and-evolution"}, {"path": "khan/science/biology/her/evolution-and-natural-selection/evolution-clarification/", "id": "nh1R-gyY7es", "title": "Evolution clarification", "kind": "Video", "description": "Clarifying some points on evolution and intelligent design", "slug": "evolution-clarification"}, {"path": "khan/science/biology/her/evolution-and-natural-selection/natural-selection-and-the-owl-butterfly/", "id": "dR_BFmDMRaI", "title": "Natural selection and the owl butterfly", "kind": "Video", "description": "How the \"Owl Butterfly\" may have gotten the spot on its wings.", "slug": "natural-selection-and-the-owl-butterfly"}, {"path": "khan/science/biology/her/evolution-and-natural-selection/variation-in-a-species/", "id": "DuArVnT1i-E", "title": "Variation in a species", "kind": "Video", "description": "How variation can be introduced into a species.", "slug": "variation-in-a-species"}], "in_knowledge_map": false, "description": "", "node_slug": "evolution-and-natural-selection", "render_type": "Tutorial", "topic_page_url": "/science/biology/her/evolution-and-natural-selection", "extended_slug": "science/biology/her/evolution-and-natural-selection", "kind": "Topic", "slug": "evolution-and-natural-selection"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/her/heredity-and-genetics/", "id": "heredity-and-genetics", "hide": false, "title": "Heredity and genetics", "child_data": [{"kind": "Video", "id": "23940"}, {"kind": "Video", "id": "23942"}, {"kind": "Video", "id": "xf2057c13"}, {"kind": "Video", "id": "x5628ee19"}, {"kind": "Video", "id": "x15272d4a"}, {"kind": "Video", "id": "23946"}, {"kind": "Video", "id": "x983f0c01"}, {"kind": "Video", "id": "x4626c3c0"}, {"kind": "Video", "id": "x5155c0f0"}], "children": [{"path": "khan/science/biology/her/heredity-and-genetics/introduction-to-heredity/", "id": "eEUvRrhmcxM", "title": "Introduction to heredity", "kind": "Video", "description": "Heredity and Classical Genetics. Dominant and recessive traits. Heterozygous and homozygous genotypes.", "slug": "introduction-to-heredity"}, {"path": "khan/science/biology/her/heredity-and-genetics/punnett-square-fun/", "id": "D5ymMYcLtv0", "title": "Punnett square fun", "kind": "Video", "description": "Dihybrid crosses. Independent assortment. Incomplete dominance. Codominance and multiple alleles.", "slug": "punnett-square-fun"}, {"path": "khan/science/biology/her/heredity-and-genetics/allele-frequency/", "id": "Bc9bhLk_AhI", "title": "Allele frequency", "kind": "Video", "slug": "allele-frequency"}, {"path": "khan/science/biology/her/heredity-and-genetics/hardy-weinberg/", "id": "oc9fJCAIRJs", "title": "Hardy Weinberg equation", "kind": "Video", "slug": "hardy-weinberg"}, {"path": "khan/science/biology/her/heredity-and-genetics/applying-hardy-weinberg/", "id": "D5NVlAaT-OA", "title": "Applying the Hardy Weinberg equation", "kind": "Video", "slug": "applying-hardy-weinberg"}, {"path": "khan/science/biology/her/heredity-and-genetics/sex-linked-traits/", "id": "-ROhfKyxgCo", "title": "Sex-linked traits", "kind": "Video", "description": "Chromosomal basis for gender. Sex-linked traits.", "slug": "sex-linked-traits"}, {"path": "khan/science/biology/her/heredity-and-genetics/dna-deoxyribonucleic-acid/", "id": "AmOO4j0E408", "title": "DNA", "kind": "Video", "slug": "dna-deoxyribonucleic-acid"}, {"path": "khan/science/biology/her/heredity-and-genetics/rna-transcription-and-translation/", "id": "6gUY5NoX1Lk", "title": "DNA replication and RNA transcription and translation", "kind": "Video", "slug": "rna-transcription-and-translation"}, {"path": "khan/science/biology/her/heredity-and-genetics/alleles-and-genes/", "id": "P0nMnPPdW_k", "title": "Alleles and genes", "kind": "Video", "slug": "alleles-and-genes"}], "in_knowledge_map": false, "description": "", "node_slug": "heredity-and-genetics", "render_type": "Tutorial", "topic_page_url": "/science/biology/her/heredity-and-genetics", "extended_slug": "science/biology/her/heredity-and-genetics", "kind": "Topic", "slug": "heredity-and-genetics"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/her/tree-of-life/", "id": "tree-of-life", "hide": false, "title": "Tree of life", "child_data": [{"kind": "Video", "id": "351477593"}, {"kind": "Video", "id": "351477592"}, {"kind": "Video", "id": "23948"}, {"kind": "Video", "id": "23950"}, {"kind": "Video", "id": "731266298"}, {"kind": "Video", "id": "731151623"}, {"kind": "Video", "id": "731161734"}, {"kind": "Video", "id": "731231828"}, {"kind": "Video", "id": "731130609"}], "children": [{"path": "khan/science/biology/her/tree-of-life/taxonomy-and-the-tree-of-life/", "id": "oHvLlS_Sc54", "title": "Taxonomy and the tree of life", "kind": "Video", "description": "The science of taxonomy and where humans fit into the tree of life", "slug": "taxonomy-and-the-tree-of-life"}, {"path": "khan/science/biology/her/tree-of-life/species/", "id": "Tmt4zrDK3dA", "title": "Species", "kind": "Video", "description": "What a species is and isn't. Ligers, tiglons, mule, hinnies, and dogs", "slug": "species"}, {"path": "khan/science/biology/her/tree-of-life/bacteria/", "id": "TDoGrbpJJ14", "title": "Bacteria", "kind": "Video", "description": "Introduction to bacteria", "slug": "bacteria"}, {"path": "khan/science/biology/her/tree-of-life/viruses/", "id": "0h5Jd7sgQWY", "title": "Viruses", "kind": "Video", "description": "Introduction to viruses", "slug": "viruses"}, {"path": "khan/science/biology/her/tree-of-life/human-prehistory-101-prologue/", "id": "Mm-IxK1GrYE", "title": "Human prehistory 101: Prologue", "kind": "Video", "description": "Award winning video introduces human prehistory starting over 200,000 years ago. Who were our first human ancestors? Where did they live?", "slug": "human-prehistory-101-prologue"}, {"path": "khan/science/biology/her/tree-of-life/human-prehistory-101-part-1-out-of-eastern-africa/", "id": "8183HPmA2_I", "title": "Human prehistory 101 part 1: Out of (eastern) Africa", "kind": "Video", "description": "Second in a series of videos that introduces human prehistory, this video describes how our human ancestors spread throughout Africa and then into other regions such as Australia and Europe. How did they reach Australia so early on? What happened when our ancestors encountered Neanderthals?", "slug": "human-prehistory-101-part-1-out-of-eastern-africa"}, {"path": "khan/science/biology/her/tree-of-life/human-prehistory-101-part-2-weathering-the-storm/", "id": "T9Nw66RCMhg", "title": "Human prehistory 101 part 2: Weathering the storm", "kind": "Video", "description": "Third in a series of videos that introduces human prehistory, this video describes how early humans continued to defy the odds and populated the Americas during the last ice age.", "slug": "human-prehistory-101-part-2-weathering-the-storm"}, {"path": "khan/science/biology/her/tree-of-life/human-prehistory-101-part-3-agriculture-rocks-our-world/", "id": "IVHD9wGlbho", "title": "Human prehistory 101 part 3: Agriculture rocks our world", "kind": "Video", "slug": "human-prehistory-101-part-3-agriculture-rocks-our-world"}, {"path": "khan/science/biology/her/tree-of-life/human-prehistory-101-epilogue/", "id": "F-zRXHAo4-U", "title": "Human prehistory 101: Epilogue", "kind": "Video", "slug": "human-prehistory-101-epilogue"}], "in_knowledge_map": false, "description": "", "node_slug": "tree-of-life", "render_type": "Tutorial", "topic_page_url": "/science/biology/her/tree-of-life", "extended_slug": "science/biology/her/tree-of-life", "kind": "Topic", "slug": "tree-of-life"}], "in_knowledge_map": false, "description": "Learn about evolution and genetics! Here, you can dive deeper into evolution, natural selection, and the tree of life, as well as Mendelian genetics and population genetics. Special bonus: explore genetics at the molecular level, learning about DNA, RNA, transcription, and translation.", "node_slug": "her", "render_type": "Topic", "topic_page_url": "/science/biology/her", "extended_slug": "science/biology/her", "kind": "Topic", "slug": "her"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/biology/human-biology/", "id": "human-biology", "hide": false, "title": "Human biology", "child_data": [{"kind": "Topic", "id": "x5623d1f7"}, {"kind": "Topic", "id": "x84972058"}, {"kind": "Topic", "id": "xe45737c8"}, {"kind": "Topic", "id": "xbcee1713"}, {"kind": "Topic", "id": "xc6bf9499"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/human-biology/circulatory-pulmonary/", "id": "circulatory-pulmonary", "hide": false, "title": "Circulatory and pulmonary systems", "child_data": [{"kind": "Video", "id": "23986"}, {"kind": "Video", "id": "23988"}, {"kind": "Video", "id": "23990"}, {"kind": "Video", "id": "23992"}], "children": [{"path": "khan/science/biology/human-biology/circulatory-pulmonary/the-lungs-and-pulmonary-system/", "id": "SPGRkexI_cs", "title": "The lungs and pulmonary system", "kind": "Video", "description": "The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles, alveoli and thoracic diaphragm", "slug": "the-lungs-and-pulmonary-system"}, {"path": "khan/science/biology/human-biology/circulatory-pulmonary/red-blood-cells/", "id": "fLKOBQ6cZHA", "title": "Red blood cells", "kind": "Video", "description": "Oxygen uptake by hemoglobin in red blood cells", "slug": "red-blood-cells"}, {"path": "khan/science/biology/human-biology/circulatory-pulmonary/circulatory-system-and-the-heart/", "id": "QhiVnFvshZg", "title": "Circulatory system and the heart", "kind": "Video", "description": "Introduction to the circulatory system and the heart", "slug": "circulatory-system-and-the-heart"}, {"path": "khan/science/biology/human-biology/circulatory-pulmonary/hemoglobin/", "id": "LWtXthfG9_M", "title": "Hemoglobin", "kind": "Video", "description": "Hemoglobin and its role in the circulatory system", "slug": "hemoglobin"}], "in_knowledge_map": false, "description": "As humans, we really like breathing oxygen. That's because the cells in our body will die if they don't get oxygen to function in a reasonable amount of time. This tutorials describes how we use the lungs to exchange gasses between our blood and the atmosphere and how the oxygen is then pumped through the body by way of blood and the circulatory system.", "node_slug": "circulatory-pulmonary", "render_type": "Tutorial", "topic_page_url": "/science/biology/human-biology/circulatory-pulmonary", "extended_slug": "science/biology/human-biology/circulatory-pulmonary", "kind": "Topic", "slug": "circulatory-pulmonary"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/human-biology/neuron-nervous-system/", "id": "neuron-nervous-system", "hide": false, "title": "The neuron and nervous system", "child_data": [{"kind": "Video", "id": "23994"}, {"kind": "Video", "id": "23996"}, {"kind": "Video", "id": "27192"}, {"kind": "Video", "id": "xbfcf48e2"}, {"kind": "Video", "id": "x45263500"}, {"kind": "Video", "id": "24002"}], "children": [{"path": "khan/science/biology/human-biology/neuron-nervous-system/anatomy-of-a-neuron/", "id": "ob5U8zPbAX4", "title": "Anatomy of a neuron", "kind": "Video", "description": "Introduction to the neuron and its anatomy", "slug": "anatomy-of-a-neuron"}, {"path": "khan/science/biology/human-biology/neuron-nervous-system/sodium-potassium-pump/", "id": "C_H-ONQFjpQ", "title": "Sodium potassium pump", "kind": "Video", "description": "How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane", "slug": "sodium-potassium-pump"}, {"path": "khan/science/biology/human-biology/neuron-nervous-system/correction-to-sodium-and-potassium-pump-video/", "id": "ye3rTjLCvAU", "title": "Correction to sodium and potassium pump video", "kind": "Video", "description": "Correction to Sodium and Potassium Pump Video", "slug": "correction-to-sodium-and-potassium-pump-video"}, {"path": "khan/science/biology/human-biology/neuron-nervous-system/electrotonic-action-potential/", "id": "kY8FEq0teOs", "title": "Electrotonic and action potential", "kind": "Video", "slug": "electrotonic-action-potential"}, {"path": "khan/science/biology/human-biology/neuron-nervous-system/saltatory-conduction-neurons/", "id": "ikFUv-gdNLQ", "title": "Saltatory conduction in neurons", "kind": "Video", "slug": "saltatory-conduction-neurons"}, {"path": "khan/science/biology/human-biology/neuron-nervous-system/neuronal-synapses-chemical/", "id": "Tbq-KZaXiL4", "title": "Neuronal synapses (chemical)", "kind": "Video", "description": "How one neuron can stimulate (or inhibit) another neuron at a chemical synapse", "slug": "neuronal-synapses-chemical"}], "in_knowledge_map": false, "description": "Neurons are the primary way that our bodies transmit signals from one part to another quickly. In this tutorial, we'll explore the anatomy of a neuron and the mechanism by which a signal is actually transmitted through one.", "node_slug": "neuron-nervous-system", "render_type": "Tutorial", "topic_page_url": "/science/biology/human-biology/neuron-nervous-system", "extended_slug": "science/biology/human-biology/neuron-nervous-system", "kind": "Topic", "slug": "neuron-nervous-system"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/human-biology/kidney-nephron/", "id": "kidney-nephron", "hide": false, "title": "The kidney and nephron", "child_data": [{"kind": "Video", "id": "24028"}, {"kind": "Video", "id": "24030"}], "children": [{"path": "khan/science/biology/human-biology/kidney-nephron/the-kidney-and-nephron/", "id": "cc8sUv2SuaY", "title": "The kidney and nephron", "kind": "Video", "description": "Overview of how the nephrons in the kidney filter blood and reabsorb water and other molecules.", "slug": "the-kidney-and-nephron"}, {"path": "khan/science/biology/human-biology/kidney-nephron/secondary-active-transport-in-the-nephron/", "id": "czY5nyvZ7cU", "title": "Secondary active transport in the nephron", "kind": "Video", "description": "Secondary Active Transport in the Nephron", "slug": "secondary-active-transport-in-the-nephron"}], "in_knowledge_map": false, "description": "How do we get unwanted substances out of our blood? Through the kidney. This tutorial goes into some detail to describe just how this happens.", "node_slug": "kidney-nephron", "render_type": "Tutorial", "topic_page_url": "/science/biology/human-biology/kidney-nephron", "extended_slug": "science/biology/human-biology/kidney-nephron", "kind": "Topic", "slug": "kidney-nephron"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/human-biology/muscles/", "id": "muscles", "hide": false, "title": "Muscles", "child_data": [{"kind": "Video", "id": "24004"}, {"kind": "Video", "id": "24006"}, {"kind": "Video", "id": "24008"}, {"kind": "Video", "id": "24010"}], "children": [{"path": "khan/science/biology/human-biology/muscles/myosin-and-actin/", "id": "zopoN2i7ALQ", "title": "Myosin and actin", "kind": "Video", "description": "How myosin and actin interact to produce mechanical force.", "slug": "myosin-and-actin"}, {"path": "khan/science/biology/human-biology/muscles/tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction/", "id": "LiOfeSsjrB8", "title": "Tropomyosin and troponin and their role in regulating muscle contraction", "kind": "Video", "description": "Tropomyosin and troponin and their role in regulating muscle contraction. How calcium ion concentration dictates whether a muscle is contracting or not.", "slug": "tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction"}, {"path": "khan/science/biology/human-biology/muscles/role-of-the-sarcoplasmic-reticulum-in-muscle-cells/", "id": "SauhB2fYQkM", "title": "Role of the sarcoplasmic reticulum in muscle cells", "kind": "Video", "description": "The role of the sarcoplasmic reticulum in controlling calcium ion concentrations within the muscle cell.", "slug": "role-of-the-sarcoplasmic-reticulum-in-muscle-cells"}, {"path": "khan/science/biology/human-biology/muscles/anatomy-of-a-muscle-cell/", "id": "uY2ZOsCnXIA", "title": "Anatomy of a skeletal muscle fiber", "kind": "Video", "description": "Understanding the structure of a muscle fiber", "slug": "anatomy-of-a-muscle-cell"}], "in_knowledge_map": false, "description": "Without muscles, we wouldn't be able to do much of anything. This tutorial begins to explore what muscle cells are and how they contract in order to move our bodies (or do things like breath and pump blood).", "node_slug": "muscles", "render_type": "Tutorial", "topic_page_url": "/science/biology/human-biology/muscles", "extended_slug": "science/biology/human-biology/muscles", "kind": "Topic", "slug": "muscles"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/human-biology/immunology/", "id": "immunology", "hide": false, "title": "Immunology", "child_data": [{"kind": "Video", "id": "24012"}, {"kind": "Video", "id": "24014"}, {"kind": "Video", "id": "24016"}, {"kind": "Video", "id": "24018"}, {"kind": "Video", "id": "24020"}, {"kind": "Video", "id": "xb1e2a45d"}, {"kind": "Video", "id": "24024"}, {"kind": "Video", "id": "24026"}], "children": [{"path": "khan/science/biology/human-biology/immunology/role-of-phagocytes-in-innate-or-nonspecific-immunity/", "id": "O1N2rENXq_Y", "title": "Role of phagocytes in innate or nonspecific immunity", "kind": "Video", "description": "Role of phagocytes in innate or nonspecific immunity. Neutrophils, macrophages, and dendritic cells. MHC II.", "slug": "role-of-phagocytes-in-innate-or-nonspecific-immunity"}, {"path": "khan/science/biology/human-biology/immunology/types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated/", "id": "rp7T4IItbtM", "title": "Types of immune responses: Innate and adaptive. humoral vs. cell-mediated", "kind": "Video", "description": "Overview of types of immune responses. Difference between innate and adaptive immunity. Differences between humoral adaptive immunity and cell-mediated adaptive immunity.", "slug": "types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated"}, {"path": "khan/science/biology/human-biology/immunology/b-lymphocytes-b-cells/", "id": "Z36dUduOk1Y", "title": "B lymphocytes (B cells)", "kind": "Video", "description": "Overview of B cells (B lymphocytes) and how they are activated and produce antibodies", "slug": "b-lymphocytes-b-cells"}, {"path": "khan/science/biology/human-biology/immunology/professional-antigen-presenting-cells-apc-and-mhc-ii-complexes/", "id": "j_kSmmEpvQk", "title": "Professional antigen presenting cells (APC) and MHC II complexes", "kind": "Video", "description": "How professional antigen presenting cells present parts of engulfed pathogens on MHC II complexes (major histocompatibility complexes).", "slug": "professional-antigen-presenting-cells-apc-and-mhc-ii-complexes"}, {"path": "khan/science/biology/human-biology/immunology/helper-t-cells/", "id": "uwMYpTYsNZM", "title": "Helper T cells", "kind": "Video", "description": "Introduction to helper T cells and their role in activating B cells", "slug": "helper-t-cells"}, {"path": "khan/science/biology/human-biology/immunology/cytotoxic-t-cell-mhc-i-complexes/", "id": "YdBXHm3edL8", "title": "Cytotoxic T cells and MHC I complexes", "kind": "Video", "slug": "cytotoxic-t-cell-mhc-i-complexes"}, {"path": "khan/science/biology/human-biology/immunology/review-of-b-cells-cd4-t-cells-and-cd8-t-cells/", "id": "xaz5ftvZCyI", "title": "Review of B cells, CD4+ T cells and CD8+ T cells", "kind": "Video", "description": "Review of B cells, CD4+ T cells and CD8+ T cells", "slug": "review-of-b-cells-cd4-t-cells-and-cd8-t-cells"}, {"path": "khan/science/biology/human-biology/immunology/inflammatory-response/", "id": "FXSuEIMrPQk", "title": "Inflammatory response", "kind": "Video", "description": "Overview of the inflammatory response", "slug": "inflammatory-response"}], "in_knowledge_map": false, "description": "", "node_slug": "immunology", "render_type": "Tutorial", "topic_page_url": "/science/biology/human-biology/immunology", "extended_slug": "science/biology/human-biology/immunology", "kind": "Topic", "slug": "immunology"}], "in_knowledge_map": false, "description": "Your body is an amazing system! The human body is made up of groups of organs, called organ systems, that work together to keep the body in balance. In this section, we'll travel from the circulatory system, to the nervous system, to the immune system and beyond. Learn about the amazing biology that keeps your body ticking!", "node_slug": "human-biology", "render_type": "Topic", "topic_page_url": "/science/biology/human-biology", "extended_slug": "science/biology/human-biology", "kind": "Topic", "slug": "human-biology"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/biology/ask-a-biologist/", "id": "ask-a-biologist", "hide": false, "title": "Ask a biologist (archive)", "child_data": [{"kind": "Topic", "id": "x5886218d"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/biology/ask-a-biologist/ask-a-biologist-tutorial/", "id": "ask-a-biologist-tutorial", "hide": false, "title": "Ask a biologist!", "child_data": [{"kind": "Video", "id": "x9fd95ae6"}], "children": [{"path": "khan/science/biology/ask-a-biologist/ask-a-biologist-tutorial/have-a-question-about-biology/", "id": "FxN1tfd8_lk", "title": "Ask a biologist (archived questions)", "kind": "Video", "description": "This video was open for questions from July 28-August 2, 2015, and is now CLOSED (archived). Look below to browse the questions, or ask your own question in the comments section of another video or article!", "slug": "have-a-question-about-biology"}], "in_knowledge_map": false, "description": "", "node_slug": "ask-a-biologist-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/biology/ask-a-biologist/ask-a-biologist-tutorial", "extended_slug": "science/biology/ask-a-biologist/ask-a-biologist-tutorial", "kind": "Topic", "slug": "ask-a-biologist-tutorial"}], "in_knowledge_map": false, "description": "Archived questions from open question and answer session that ran July 28-August 2, 2015. The session is no longer open for questions, but can still be browsed. Please feel free to ask your own questions in the comments sections below other videos and questions.", "node_slug": "ask-a-biologist", "render_type": "Topic", "topic_page_url": "/science/biology/ask-a-biologist", "extended_slug": "science/biology/ask-a-biologist", "kind": "Topic", "slug": "ask-a-biologist"}], "in_knowledge_map": false, "description": "Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems, biology is the study of the fascinating and intricate systems that make life possible. Dive in to learn more about the many branches of biology and why they are exciting and important.\n\nCovers topics seen in a high school or first-year college biology course.", "node_slug": "biology", "render_type": "Subject", "topic_page_url": "/science/biology", "extended_slug": "science/biology", "kind": "Topic", "slug": "biology"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/physics/", "id": "physics", "hide": false, "title": "Physics", "child_data": [{"kind": "Topic", "id": "x4549128e"}, {"kind": "Topic", "id": "xb32c33a3"}, {"kind": "Topic", "id": "x85860e19"}, {"kind": "Topic", "id": "xbb0e99c9"}, {"kind": "Topic", "id": "xbcbeda4a"}, {"kind": "Topic", "id": "x6e1d9254"}, {"kind": "Topic", "id": "x17c5da0a"}, {"kind": "Topic", "id": "x90a204f6"}, {"kind": "Topic", "id": "x312959d8"}, {"kind": "Topic", "id": "xacf207fb"}, {"kind": "Topic", "id": "xab74609b"}, {"kind": "Topic", "id": "xce59fb3b"}, {"kind": "Topic", "id": "x9e83de9f"}, {"kind": "Topic", "id": "xe70fb08c"}, {"kind": "Topic", "id": "x1e518b33"}, {"kind": "Topic", "id": "xe9d32b4e"}, {"kind": "Topic", "id": "x11b2fc1b"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/physics/one-dimensional-motion/", "id": "one-dimensional-motion", "hide": false, "title": "One-dimensional motion", "child_data": [{"kind": "Topic", "id": "xa4231052"}, {"kind": "Topic", "id": "x9b6bf3d2"}, {"kind": "Topic", "id": "x167c02e5"}, {"kind": "Topic", "id": "xa4bbd186"}, {"kind": "Topic", "id": "x560c5a47"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/science/physics/one-dimensional-motion/skill-check-for-one-dimensional-motion/", "id": "skill-check-for-one-dimensional-motion", "hide": false, "title": "Skill check for one-dimensional motion", "child_data": [{"kind": "Exercise", "id": "x5077d6f5"}], "children": [{"path": "khan/science/physics/one-dimensional-motion/skill-check-for-one-dimensional-motion/one-dimensional-motion-skill-check/", "id": "one-dimensional-motion-skill-check", "title": "Skill check: One-dimensional motion", "description": "This is a skill check that can help you determine what areas to review in one-dimensional motion.", "slug": "one-dimensional-motion-skill-check", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Test your knowledge about one-dimensional motion for the new school year. Try this skill check for a quick review and links to review videos.", "node_slug": "skill-check-for-one-dimensional-motion", "render_type": "Tutorial", "topic_page_url": "/science/physics/one-dimensional-motion/skill-check-for-one-dimensional-motion", "extended_slug": "science/physics/one-dimensional-motion/skill-check-for-one-dimensional-motion", "kind": "Topic", "slug": "skill-check-for-one-dimensional-motion"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/one-dimensional-motion/displacement-velocity-time/", "id": "displacement-velocity-time", "hide": false, "title": "Displacement, velocity, and time", "child_data": [{"kind": "Video", "id": "x27e20ede"}, {"kind": "Article", "id": "xf40319c9"}, {"kind": "Video", "id": "113633126"}, {"kind": "Article", "id": "x0bf8d131"}, {"kind": "Video", "id": "113633127"}, {"kind": "Video", "id": "113633128"}, {"kind": "Video", "id": "113633129"}, {"kind": "Video", "id": "xc7e30831"}, {"kind": "Article", "id": "x1c46a417"}, {"kind": "Video", "id": "x92717942"}, {"kind": "Article", "id": "x10fa0adf"}], "children": [{"path": "khan/science/physics/one-dimensional-motion/displacement-velocity-time/introduction-to-physics/", "id": "uIojjqSm0m4", "title": "Introduction to physics", "kind": "Video", "description": "An overview video of what physics is about as we delve deeper in future videos!", "slug": "introduction-to-physics"}, {"path": "khan/science/physics/one-dimensional-motion/displacement-velocity-time/introduction-to-vectors-and-scalars/", "id": "ihNZlp7iUHE", "title": "Introduction to vectors and scalars", "kind": "Video", "description": "Distance, displacement, speed and velocity. Difference between vectors and scalars", "slug": "introduction-to-vectors-and-scalars"}, {"path": "khan/science/physics/one-dimensional-motion/displacement-velocity-time/calculating-average-velocity-or-speed/", "id": "oRKxmXwLvUU", "title": "Calculating average velocity or speed", "kind": "Video", "description": "Example of calculating speed and velocity", "slug": "calculating-average-velocity-or-speed"}, {"path": "khan/science/physics/one-dimensional-motion/displacement-velocity-time/solving-for-time/", "id": "awzOvyMKeMA", "title": "Solving for time", "kind": "Video", "description": "Simple example of solving for time given distance and rate", "slug": "solving-for-time"}, {"path": "khan/science/physics/one-dimensional-motion/displacement-velocity-time/displacement-from-time-and-velocity-example/", "id": "lQ-dvt3V4yQ", "title": "Displacement from time and velocity example", "kind": "Video", "description": "Worked example of calculating displacement from time and velocity", "slug": "displacement-from-time-and-velocity-example"}, {"path": "khan/science/physics/one-dimensional-motion/displacement-velocity-time/instantaneous-speed-and-velocity/", "id": "pfTTHx9kCHk", "title": "Instantaneous speed and velocity", "kind": "Video", "slug": "instantaneous-speed-and-velocity"}, {"path": "khan/science/physics/one-dimensional-motion/displacement-velocity-time/position-vs-time-graphs/", "id": "wzzvz1hC5jA", "title": "Position vs. time graphs", "kind": "Video", "description": "David explains how to read a position vs. time graph. He then explains how to use the graph to determine the following quantities: displacement, distance, average velocity, average speed, instantaneous velocity, and instantaneous speed.", "slug": "position-vs-time-graphs"}], "in_knowledge_map": false, "description": "This tutorial is the backbone of your understanding of kinematics (i.e., the motion of objects). You might already know that distance = rate x time. This tutorial essentially reviews that idea with a vector lens (we introduce you to vectors here as well). So strap your belts (actually this might not be necessary since we don't plan on decelerating in this tutorial) and prepare for a gentle ride of foundational physics knowledge.", "node_slug": "displacement-velocity-time", "render_type": "Tutorial", "topic_page_url": "/science/physics/one-dimensional-motion/displacement-velocity-time", "extended_slug": "science/physics/one-dimensional-motion/displacement-velocity-time", "kind": "Topic", "slug": "displacement-velocity-time"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/one-dimensional-motion/acceleration-tutorial/", "id": "acceleration-tutorial", "hide": false, "title": "Acceleration", "child_data": [{"kind": "Video", "id": "115608380"}, {"kind": "Article", "id": "xabf775be"}, {"kind": "Video", "id": "115608382"}, {"kind": "Video", "id": "115608385"}, {"kind": "Video", "id": "115608383"}, {"kind": "Article", "id": "x6120940a"}, {"kind": "Video", "id": "x1f587590"}, {"kind": "Article", "id": "x58da39ab"}], "children": [{"path": "khan/science/physics/one-dimensional-motion/acceleration-tutorial/acceleration/", "id": "FOkQszg1-j8", "title": "Acceleration", "kind": "Video", "description": "Calculating the acceleration of a Porsche", "slug": "acceleration"}, {"path": "khan/science/physics/one-dimensional-motion/acceleration-tutorial/airbus-a380-take-off-time/", "id": "p4DTormtEG0", "title": "Airbus A380 take-off time", "kind": "Video", "description": "Figuring how long it takes an a380 to take off given a constant acceleration", "slug": "airbus-a380-take-off-time"}, {"path": "khan/science/physics/one-dimensional-motion/acceleration-tutorial/airbus-a380-take-off-distance/", "id": "fQt69_Q2CTw", "title": "Airbus A380 take-off distance", "kind": "Video", "description": "How long of a runway does an A380 need?", "slug": "airbus-a380-take-off-distance"}, {"path": "khan/science/physics/one-dimensional-motion/acceleration-tutorial/why-distance-is-area-under-velocity-time-line/", "id": "d-_eqgj5-K8", "title": "Why distance is area under velocity-time line", "kind": "Video", "description": "Understanding why distance is area under velocity-time line", "slug": "why-distance-is-area-under-velocity-time-line"}, {"path": "khan/science/physics/one-dimensional-motion/acceleration-tutorial/acceleration-vs-time-graphs/", "id": "SeZk0raNR5U", "title": "Acceleration vs. time graphs", "kind": "Video", "description": "David explains how to read an acceleration vs. time graph. He then shows how the area under the curve gives the change in velocity and does a few examples.", "slug": "acceleration-vs-time-graphs"}], "in_knowledge_map": false, "description": "In a world full of unbalanced forces (which you learn more about when you study Newton's laws), you will have acceleration (which is the rate in change of velocity). Whether you're thinking about how fast a Porsche can get to 60mph or how long it takes for a passenger plane to get to the necessary speed for flight, this tutorial will help.", "node_slug": "acceleration-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/physics/one-dimensional-motion/acceleration-tutorial", "extended_slug": "science/physics/one-dimensional-motion/acceleration-tutorial", "kind": "Topic", "slug": "acceleration-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/", "id": "kinematic-formulas", "hide": false, "title": "Kinematic formulas and projectile motion", "child_data": [{"kind": "Video", "id": "115608384"}, {"kind": "Video", "id": "115608386"}, {"kind": "Video", "id": "117992975"}, {"kind": "Video", "id": "117992973"}, {"kind": "Video", "id": "117992974"}, {"kind": "Video", "id": "117992977"}, {"kind": "Video", "id": "117992976"}, {"kind": "Article", "id": "xfdcfbb61"}, {"kind": "Video", "id": "408498076"}], "children": [{"path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/average-velocity-for-constant-acceleration/", "id": "MAS6mBRZZXA", "title": "Average velocity for constant acceleration", "kind": "Video", "description": "Calculating average velocity when acceleration is constant", "slug": "average-velocity-for-constant-acceleration"}, {"path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/acceleration-of-aircraft-carrier-takeoff/", "id": "VYgSXBjEA8I", "title": "Acceleration of aircraft carrier take-off", "kind": "Video", "description": "Using what we know about take-off velocity and runway length to determine acceleration", "slug": "acceleration-of-aircraft-carrier-takeoff"}, {"path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/deriving-displacement-as-a-function-of-time-acceleration-and-initial-velocity/", "id": "wlB0x9W-qBU", "title": "Deriving displacement as a function of time, acceleration, and initial velocity", "kind": "Video", "description": "Deriving displacement as a function of time, constant acceleration and initial velocity", "slug": "deriving-displacement-as-a-function-of-time-acceleration-and-initial-velocity"}, {"path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/plotting-projectile-displacement-acceleration-and-velocity/", "id": "T0zpF_j7Mvo", "title": "Plotting projectile displacement, acceleration, and velocity", "kind": "Video", "description": "Plotting projectile displacement, acceleration, and velocity as a function to change in time", "slug": "plotting-projectile-displacement-acceleration-and-velocity"}, {"path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/projectile-height-given-time/", "id": "IYS4Bd9F3LA", "title": "Projectile height given time", "kind": "Video", "description": "Figuring out how high a ball gets given how long it spends in the air", "slug": "projectile-height-given-time"}, {"path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/deriving-max-projectile-displacement-given-time/", "id": "P7LKEkcNibo", "title": "Deriving max projectile displacement given time", "kind": "Video", "description": "Deriving a formula for maximum projectile displacement as a function of elapsed time", "slug": "deriving-max-projectile-displacement-given-time"}, {"path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/impact-velocity-from-given-height/", "id": "2ZgBJxT9pbU", "title": "Impact velocity from given height", "kind": "Video", "description": "Determining how fast something will be traveling upon impact when it is released from a given height", "slug": "impact-velocity-from-given-height"}, {"path": "khan/science/physics/one-dimensional-motion/kinematic-formulas/viewing-g-as-the-value-of-earth-s-gravitational-field-near-the-surface/", "id": "1E3Z_R5AHdg", "title": "Viewing g as the value of Earth's gravitational field near the surface", "kind": "Video", "description": "Viewing g as the value of Earth's gravitational field near the surface rather than the acceleration due to gravity near Earth's surface for an object in freefall", "slug": "viewing-g-as-the-value-of-earth-s-gravitational-field-near-the-surface"}], "in_knowledge_map": false, "description": "We don't believe in memorizing formulas and neither should you (unless you want to live your life as a shadow of your true potential). This tutorial builds on what we know about displacement, velocity and acceleration to solve problems in kinematics (including projectile motion problems). Along the way, we derive (and re-derive) some of the classic formulas that you might see in your physics book.", "node_slug": "kinematic-formulas", "render_type": "Tutorial", "topic_page_url": "/science/physics/one-dimensional-motion/kinematic-formulas", "extended_slug": "science/physics/one-dimensional-motion/kinematic-formulas", "kind": "Topic", "slug": "kinematic-formulas"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/", "id": "old-projectile-motion", "hide": false, "title": "Old videos on projectile motion", "child_data": [{"kind": "Video", "id": "25515"}, {"kind": "Video", "id": "25517"}, {"kind": "Video", "id": "25519"}, {"kind": "Video", "id": "25521"}, {"kind": "Video", "id": "25523"}], "children": [{"path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/projectile-motion-part-1/", "id": "15zliAL4llE", "title": "Projectile motion (part 1)", "kind": "Video", "description": "Using the equations of motion to figure out things about falling objects", "slug": "projectile-motion-part-1"}, {"path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/projectile-motion-part-2/", "id": "emdHj6WodLw", "title": "Projectile motion (part 2)", "kind": "Video", "description": "A derivation of a new motion equation", "slug": "projectile-motion-part-2"}, {"path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/projectile-motion-part-3/", "id": "Y5cSGxdDHz4", "title": "Projectile motion (part 3)", "kind": "Video", "description": "An example of solving for the final velocity when you know the change in distance, time, initial velocity, and acceleration", "slug": "projectile-motion-part-3"}, {"path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/projectile-motion-part-4/", "id": "-W3RkgvLrGI", "title": "Projectile motion (part 4)", "kind": "Video", "description": "Solving for time when you are given the change in distance, acceleration, and initial velocity", "slug": "projectile-motion-part-4"}, {"path": "khan/science/physics/one-dimensional-motion/old-projectile-motion/projectile-motion-part-5/", "id": "dlpmllTx5MY", "title": "Projectile motion (part 5)", "kind": "Video", "description": "How fast was the ball that you threw upwards?", "slug": "projectile-motion-part-5"}], "in_knowledge_map": false, "description": "This tutorial has some of the old videos that Sal first did around 2007. This content is covered elsewhere, but some folks like the raw (and masculine) simplicity of these first lessons (Sal added the bit about \"masculine\").", "node_slug": "old-projectile-motion", "render_type": "Tutorial", "topic_page_url": "/science/physics/one-dimensional-motion/old-projectile-motion", "extended_slug": "science/physics/one-dimensional-motion/old-projectile-motion", "kind": "Topic", "slug": "old-projectile-motion"}], "in_knowledge_map": false, "description": "In this tutorial we begin to explore ideas of velocity and acceleration. We do exciting things like throw things off cliffs (far safer on paper than in real life) and see how high a ball will fly in the air.", "node_slug": "one-dimensional-motion", "render_type": "Topic", "topic_page_url": "/science/physics/one-dimensional-motion", "extended_slug": "science/physics/one-dimensional-motion", "kind": "Topic", "slug": "one-dimensional-motion"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/two-dimensional-motion/", "id": "two-dimensional-motion", "hide": false, "title": "Two-dimensional motion", "child_data": [{"kind": "Topic", "id": "xfe544d93"}, {"kind": "Topic", "id": "x4d7416d3"}, {"kind": "Topic", "id": "xac0cb604"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/", "id": "two-dimensional-projectile-mot", "hide": false, "title": "Two-dimensional projectile motion", "child_data": [{"kind": "Video", "id": "119166564"}, {"kind": "Video", "id": "119166555"}, {"kind": "Article", "id": "x5f614a54"}, {"kind": "Video", "id": "119166557"}, {"kind": "Video", "id": "x76b46282"}, {"kind": "Video", "id": "119166560"}, {"kind": "Video", "id": "119166561"}, {"kind": "Video", "id": "119166563"}, {"kind": "Video", "id": "119166556"}, {"kind": "Article", "id": "x31106451"}, {"kind": "Video", "id": "119166558"}, {"kind": "Video", "id": "120330492"}, {"kind": "Video", "id": "25609"}, {"kind": "Video", "id": "25611"}, {"kind": "Video", "id": "25617"}], "children": [{"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/visualizing-vectors-in-2-dimensions/", "id": "xp6ibuI8UuQ", "title": "Visualizing vectors in 2 dimensions", "kind": "Video", "description": "Visualizing, adding and breaking down vectors in 2 dimensions", "slug": "visualizing-vectors-in-2-dimensions"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/projectile-at-an-angle/", "id": "ZZ39o1rAZWY", "title": "Projectile at an angle", "kind": "Video", "description": "Figuring out the horizontal displacement for a projectile launched at an angle", "slug": "projectile-at-an-angle"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/different-way-to-determine-time-in-air/", "id": "_NWc3C3cTNA", "title": "Different way to determine time in air", "kind": "Video", "description": "Another way to determine time in the air given an initial vertical velocity", "slug": "different-way-to-determine-time-in-air"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/horizontally-launched-projectile/", "id": "lpSuBiiDjic", "title": "Horizontally launched projectile", "kind": "Video", "description": "In this video David explains how to solve for the horizontal displacement when the projectile starts with a horizontal initial velocity. He also explains common mistakes people make when doing horizontally launched projectile problems.", "slug": "horizontally-launched-projectile"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/launching-and-landing-on-different-elevations/", "id": "a5QnXi_lZII", "title": "Launching and landing on different elevations", "kind": "Video", "description": "More complicated example involving launching and landing at different elevations", "slug": "launching-and-landing-on-different-elevations"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/total-displacement-for-projectile/", "id": "UXORCpvKYiI", "title": "Total displacement for projectile", "kind": "Video", "description": "Reconstructing the total displacement vector for a projectile", "slug": "total-displacement-for-projectile"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/total-final-velocity-for-projectile/", "id": "sTp4cI9VyCU", "title": "Total final velocity for projectile", "kind": "Video", "description": "Calculating the total final velocity for a projectile landing at a different altitude (mistake near end: I write 29.03 when it should be 26.03 m/s and the final total magnitude should be 26.55 m/s 78.7 degrees below horizontal", "slug": "total-final-velocity-for-projectile"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/correction-to-total-final-velocity-for-projectile/", "id": "DNoDJlB0ygU", "title": "Correction to total final velocity for projectile", "kind": "Video", "description": "Correction to \"Total Final Velocity for Projectile\" Video", "slug": "correction-to-total-final-velocity-for-projectile"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/projectile-on-an-incline/", "id": "jNESnky3RVg", "title": "Projectile on an incline", "kind": "Video", "description": "Challenging problem of a projectile on an inclined plane", "slug": "projectile-on-an-incline"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/unit-vectors-and-engineering-notation/", "id": "2QjdcVTgTTA", "title": "Unit vectors and engineering notation", "kind": "Video", "description": "Using unit vectors to represent the components of a vector", "slug": "unit-vectors-and-engineering-notation"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/unit-vector-notation/", "id": "FaF3v-ezbSk", "title": "Unit vector notation", "kind": "Video", "description": "Expressing a vector as the scaled sum of unit vectors", "slug": "unit-vector-notation"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/unit-vector-notation-part-2/", "id": "595Tiga1gIg", "title": "Unit vector notation (part 2)", "kind": "Video", "description": "More on unit vector notation. Showing that adding the x and y components of two vectors is equivalent to adding the vectors visually using the head-to-tail method", "slug": "unit-vector-notation-part-2"}, {"path": "khan/science/physics/two-dimensional-motion/two-dimensional-projectile-mot/projectile-motion-with-ordered-set-notation/", "id": "jl_gQ-eL3xo", "title": "Projectile motion with ordered set notation", "kind": "Video", "description": "Solving the second part to the projectile motion problem (with wind gust) using ordered set vector notation", "slug": "projectile-motion-with-ordered-set-notation"}], "in_knowledge_map": false, "description": "Let's escape from the binds of one-dimension (where we were forced to launch things straight up) and start launching at angles. With a little bit of trig (might want to review sin and cos) we'll be figuring out just how long and far something can travel.", "node_slug": "two-dimensional-projectile-mot", "render_type": "Tutorial", "topic_page_url": "/science/physics/two-dimensional-motion/two-dimensional-projectile-mot", "extended_slug": "science/physics/two-dimensional-motion/two-dimensional-projectile-mot", "kind": "Topic", "slug": "two-dimensional-projectile-mot"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/two-dimensional-motion/optimal-projectile-angle/", "id": "optimal-projectile-angle", "hide": false, "title": "Optimal angle for a projectile", "child_data": [{"kind": "Video", "id": "2600647"}, {"kind": "Video", "id": "2600648"}, {"kind": "Video", "id": "2600649"}, {"kind": "Video", "id": "2600650"}], "children": [{"path": "khan/science/physics/two-dimensional-motion/optimal-projectile-angle/optimal-angle-for-a-projectile-part-1/", "id": "RhUdv0jjfcE", "title": "Optimal angle for a projectile part 1: Components of initial velocity", "kind": "Video", "slug": "optimal-angle-for-a-projectile-part-1"}, {"path": "khan/science/physics/two-dimensional-motion/optimal-projectile-angle/optimal-angle-for-a-projectile-part-2-hangtime/", "id": "XtAB9GOfLiM", "title": "Optimal angle for a projectile part 2: Hangtime", "kind": "Video", "description": "Optimal angle for a projectile part 2 - Hangtime", "slug": "optimal-angle-for-a-projectile-part-2-hangtime"}, {"path": "khan/science/physics/two-dimensional-motion/optimal-projectile-angle/optimal-angle-for-a-projectile-part-3-horizontal-distance-as-a-function-of-angle-and-speed/", "id": "-h_x8TwC1ik", "title": "Optimal angle for a projectile part 3: Horizontal distance as a function of angle (and speed)", "kind": "Video", "description": "Horizontal distance as a function of angle (and speed)", "slug": "optimal-angle-for-a-projectile-part-3-horizontal-distance-as-a-function-of-angle-and-speed"}, {"path": "khan/science/physics/two-dimensional-motion/optimal-projectile-angle/optimal-angle-for-a-projectile-part-4-finding-the-optimal-angle-and-distance-with-a-bit-of-calculus/", "id": "snw0BrCBQYQ", "title": "Optimal angle for a projectile part 4: Finding the optimal angle and distance with a bit of calculus", "kind": "Video", "slug": "optimal-angle-for-a-projectile-part-4-finding-the-optimal-angle-and-distance-with-a-bit-of-calculus"}], "in_knowledge_map": false, "description": "This tutorial tackles a fundamental question when trying to launch things as far as possible (key if you're looking to capture a fort with anything from water balloons to arrows). With a bit of calculus, we'll get to a fairly intuitive answer.", "node_slug": "optimal-projectile-angle", "render_type": "Tutorial", "topic_page_url": "/science/physics/two-dimensional-motion/optimal-projectile-angle", "extended_slug": "science/physics/two-dimensional-motion/optimal-projectile-angle", "kind": "Topic", "slug": "optimal-projectile-angle"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/", "id": "centripetal-acceleration-tutoria", "hide": false, "title": "Circular motion and centripetal acceleration", "child_data": [{"kind": "Video", "id": "115608381"}, {"kind": "Video", "id": "398471877"}, {"kind": "Video", "id": "398471876"}, {"kind": "Video", "id": "x716a60ef"}, {"kind": "Video", "id": "398485318"}, {"kind": "Video", "id": "400091838"}, {"kind": "Video", "id": "400139075"}, {"kind": "Video", "id": "400091837"}], "children": [{"path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/race-cars-with-constant-speed-around-curve/", "id": "ITA1rW5UraU", "title": "Race cars with constant speed around curve", "kind": "Video", "description": "When acceleration could involve a change in direction and not speed.", "slug": "race-cars-with-constant-speed-around-curve"}, {"path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/centripetal-force-and-acceleration-intuition/", "id": "vZOk8NnjILg", "title": "Centripetal force and acceleration intuition", "kind": "Video", "description": "The direction of the force in cases of circular motion at constant speeds", "slug": "centripetal-force-and-acceleration-intuition"}, {"path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/visual-understanding-of-centripetal-acceleration-formula/", "id": "NH1_sO8QY3o", "title": "Visual understanding of centripetal acceleration formula", "kind": "Video", "description": "Visual understanding of how centripetal acceleration relates to velocity and radius", "slug": "visual-understanding-of-centripetal-acceleration-formula"}, {"path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/jrhildebrand-turning/", "id": "MKnI3425EMI", "title": "Optimal turns at Indianapolis Motor Speedway with JR Hildebrand", "kind": "Video", "slug": "jrhildebrand-turning"}, {"path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/calculus-proof-of-centripetal-acceleration-formula/", "id": "XjCEumlJBno", "title": "Calculus proof of centripetal acceleration formula", "kind": "Video", "description": "Proving that a = v^2/r", "slug": "calculus-proof-of-centripetal-acceleration-formula"}, {"path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/loop-de-loop-question/", "id": "wjZb3zPuoeA", "title": "Loop de loop question", "kind": "Video", "description": "Asks students to find the minimum speed necessary to complete the loop de loop", "slug": "loop-de-loop-question"}, {"path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/loop-de-loop-answer-part-1/", "id": "4SQDybFjhRE", "title": "Loop de loop answer part 1", "kind": "Video", "description": "Figuring out the minimum speed at the top of the loop de loop to stay on the track", "slug": "loop-de-loop-answer-part-1"}, {"path": "khan/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria/loop-de-loop-answer-part-2/", "id": "zcnnZz2pCSg", "title": "Loop de loop answer part 2", "kind": "Video", "description": "Figuring out the car's average speed while completing the loop de loop", "slug": "loop-de-loop-answer-part-2"}], "in_knowledge_map": false, "description": "Why do things move in circles? Seriously. Why does *anything* ever move in a circle (straight lines seem much more natural)? Is something moving in a circle at a constant speed accelerating? If so, in what direction? This tutorial will help you get your mind around this super-fun topic.", "node_slug": "centripetal-acceleration-tutoria", "render_type": "Tutorial", "topic_page_url": "/science/physics/two-dimensional-motion/centripetal-acceleration-tutoria", "extended_slug": "science/physics/two-dimensional-motion/centripetal-acceleration-tutoria", "kind": "Topic", "slug": "centripetal-acceleration-tutoria"}], "in_knowledge_map": false, "description": "You understand velocity and acceleration well in one-dimension. Now we can explore scenarios that are even more fun. With a little bit of trigonometry (you might want to review your basic trig, especially what sin and cos are), we can think about whether a baseball can clear the \"green monster\" at Fenway Park.", "node_slug": "two-dimensional-motion", "render_type": "Topic", "topic_page_url": "/science/physics/two-dimensional-motion", "extended_slug": "science/physics/two-dimensional-motion", "kind": "Topic", "slug": "two-dimensional-motion"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/physics/forces-newtons-laws/", "id": "forces-newtons-laws", "hide": false, "title": "Forces and Newton's laws of motion", "child_data": [{"kind": "Topic", "id": "x282c4fdd"}, {"kind": "Topic", "id": "x680147df"}, {"kind": "Topic", "id": "xda25e021"}, {"kind": "Topic", "id": "x3d2be866"}, {"kind": "Topic", "id": "x5296131a"}, {"kind": "Topic", "id": "x539e2d76"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/", "id": "newtons-laws-of-motion", "hide": false, "title": "Newton's laws of motion", "child_data": [{"kind": "Video", "id": "904264130"}, {"kind": "Video", "id": "904189322"}, {"kind": "Video", "id": "116854909"}, {"kind": "Article", "id": "x36df664b"}, {"kind": "Exercise", "id": "xc323c32d"}, {"kind": "Video", "id": "116854910"}, {"kind": "Video", "id": "xf01df132"}, {"kind": "Article", "id": "x728d52db"}, {"kind": "Video", "id": "116854911"}, {"kind": "Video", "id": "x0d502997"}, {"kind": "Article", "id": "xd384fb9b"}, {"kind": "Exercise", "id": "x34a01c1d"}, {"kind": "Exercise", "id": "x6c2c0ec3"}], "children": [{"path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/newton-s-1st-law-of-motion/", "id": "5-ZFOhHQS68", "title": "Newton's first law of motion", "kind": "Video", "description": "Basic primer on Newton's First Law of Motion", "slug": "newton-s-1st-law-of-motion"}, {"path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/newton-s-first-law-of-motion-concepts/", "id": "D1NubiWCpQg", "title": "Newton's first law of motion concepts", "kind": "Video", "description": "A little quiz on some of the ideas in Newton's first law", "slug": "newton-s-first-law-of-motion-concepts"}, {"path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/newton-s-first-law-of-motion/", "id": "CQYELiTtUs8", "title": "More on Newton's first law of motion", "kind": "Video", "description": "Newton's First Law (Galileo's Law of Inertia).", "slug": "newton-s-first-law-of-motion"}, {"path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/newtonsfirst/", "id": "newtonsfirst", "title": "Newton's first law", "description": "Testing your conceptual knowledge of Newton's First Law of Motion", "slug": "newtonsfirst", "kind": "Exercise"}, {"path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/newton-s-second-law-of-motion/", "id": "ou9YMWlJgkE", "title": "Newton's second law of motion", "kind": "Video", "description": "Newton's Second Law of Motion: F=ma", "slug": "newton-s-second-law-of-motion"}, {"path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/more-on-newtons-second-law/", "id": "IBS-vKDw9BM", "title": "More on Newton's second law", "kind": "Video", "description": "In this video David explains how to use Newton's second law when dealing with multiple forces, forces in two dimensions, and diagonal forces.", "slug": "more-on-newtons-second-law"}, {"path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/newton-s-third-law-of-motion/", "id": "By-ggTfeuJU", "title": "Newton's third law of motion", "kind": "Video", "description": "Every action has an equal and opposite reaction", "slug": "newton-s-third-law-of-motion"}, {"path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/more-on-newtons-third-law/", "id": "8XCugIQXK-s", "title": "More on Newton's third law", "kind": "Video", "description": "In this video David explains some of the common misconceptions in dealing with Newton's Third Law. He also shows how to correctly and reliably identify Third Law force pairs.", "slug": "more-on-newtons-third-law"}, {"path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/newtons-third-law/", "id": "newtons-third-law", "title": "Newton's third law of motion", "description": "Conceptual question testing understanding of Newton's Third Law of Motion", "slug": "newtons-third-law", "kind": "Exercise"}, {"path": "khan/science/physics/forces-newtons-laws/newtons-laws-of-motion/newtons-laws/", "id": "newtons-laws", "title": "All of Newton's laws of motion", "slug": "newtons-laws", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial will expose you to the foundation of classical mechanics--Newton's laws. On one level they are intuitive, on another lever they are completely counter-intuitive. Challenge your take on reality and watch this tutorial. The world will look very different after you're done.", "node_slug": "newtons-laws-of-motion", "render_type": "Tutorial", "topic_page_url": "/science/physics/forces-newtons-laws/newtons-laws-of-motion", "extended_slug": "science/physics/forces-newtons-laws/newtons-laws-of-motion", "kind": "Topic", "slug": "newtons-laws-of-motion"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/forces-newtons-laws/normal-contact-force/", "id": "normal-contact-force", "hide": false, "title": "Normal force and contact force", "child_data": [{"kind": "Video", "id": "121089538"}, {"kind": "Article", "id": "xd09a5dbd"}, {"kind": "Video", "id": "123032799"}, {"kind": "Video", "id": "x0313dcfd"}, {"kind": "Article", "id": "x6e0cff0a"}], "children": [{"path": "khan/science/physics/forces-newtons-laws/normal-contact-force/normal-force-and-contact-force/", "id": "1WOrgrIcQZU", "title": "Normal force and contact force", "kind": "Video", "description": "The force that keeps a block of ice from falling towards the center of the earth", "slug": "normal-force-and-contact-force"}, {"path": "khan/science/physics/forces-newtons-laws/normal-contact-force/normal-force-in-an-elevator/", "id": "hoRsHNSrMpc", "title": "Normal force in an elevator", "kind": "Video", "description": "How the normal force changes when an elevator accelerates", "slug": "normal-force-in-an-elevator"}, {"path": "khan/science/physics/forces-newtons-laws/normal-contact-force/more-on-normal-force/", "id": "__gi413xGC4", "title": "More on Normal force", "kind": "Video", "description": "David explains how to deal with more complicated normal force problems, and the common misconceptions when dealing with the normal force.", "slug": "more-on-normal-force"}], "in_knowledge_map": false, "description": "A dog is balancing on one arm on my head. Is my head applying a force to the dog's hand? If it weren't, wouldn't there be nothing to offset the pull of gravity causing the acrobatic dog to fall? What would we call this force? Can we have a general term from the component of a contact force that acts perpendicular to the plane of contact? These are absolutely normal questions to ask.", "node_slug": "normal-contact-force", "render_type": "Tutorial", "topic_page_url": "/science/physics/forces-newtons-laws/normal-contact-force", "extended_slug": "science/physics/forces-newtons-laws/normal-contact-force", "kind": "Topic", "slug": "normal-contact-force"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/forces-newtons-laws/balanced-unbalanced-forces/", "id": "balanced-unbalanced-forces", "hide": false, "title": "Balanced and unbalanced forces", "child_data": [{"kind": "Video", "id": "897591106"}, {"kind": "Video", "id": "897520017"}], "children": [{"path": "khan/science/physics/forces-newtons-laws/balanced-unbalanced-forces/balanced-and-unbalanced-forces/", "id": "oNgo9bbDi7Q", "title": "Balanced and unbalanced forces", "kind": "Video", "description": "Primer on identifying balanced and unbalanced forces", "slug": "balanced-and-unbalanced-forces"}, {"path": "khan/science/physics/forces-newtons-laws/balanced-unbalanced-forces/unbalanced-forces-and-motion/", "id": "IgYUR7aFY-c", "title": "Unbalanced forces and motion", "kind": "Video", "description": "Thinking about what is true about how unbalanced forces relate to motion and acceleration", "slug": "unbalanced-forces-and-motion"}], "in_knowledge_map": false, "description": "You will often hear physics professors be careful to say \"net force\" or \"unbalanced force\" rather than just \"force\". Why? This tutorial explains why and might give you more intuition about Newton's laws in the process.", "node_slug": "balanced-unbalanced-forces", "render_type": "Tutorial", "topic_page_url": "/science/physics/forces-newtons-laws/balanced-unbalanced-forces", "extended_slug": "science/physics/forces-newtons-laws/balanced-unbalanced-forces", "kind": "Topic", "slug": "balanced-unbalanced-forces"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/forces-newtons-laws/lubricon-vi/", "id": "lubricon-vi", "hide": false, "title": "Slow sock on Lubricon VI", "child_data": [{"kind": "Video", "id": "897500670"}, {"kind": "Video", "id": "897521821"}], "children": [{"path": "khan/science/physics/forces-newtons-laws/lubricon-vi/slow-sock-on-lubricon-vi/", "id": "CEdXvoAv_oM", "title": "Slow sock on Lubricon VI", "kind": "Video", "description": "What would happen to a slowly moving frozen sock on a frictionless planet", "slug": "slow-sock-on-lubricon-vi"}, {"path": "khan/science/physics/forces-newtons-laws/lubricon-vi/normal-forces-on-lubricon-vi/", "id": "hJ18CrKU3Zc", "title": "Normal forces on Lubricon VI", "kind": "Video", "description": "Whether the normal force balances the force of gravity for a frozen sock or banana", "slug": "normal-forces-on-lubricon-vi"}], "in_knowledge_map": false, "description": "This short tutorial will have you dealing with orbiting frozen socks in order to understand whether you understand Newton's Laws. We also quiz you a bit during the videos just to make sure that you aren't daydreaming about what you would do with a frozen sock.", "node_slug": "lubricon-vi", "render_type": "Tutorial", "topic_page_url": "/science/physics/forces-newtons-laws/lubricon-vi", "extended_slug": "science/physics/forces-newtons-laws/lubricon-vi", "kind": "Topic", "slug": "lubricon-vi"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/forces-newtons-laws/inclined-planes-friction/", "id": "inclined-planes-friction", "hide": false, "title": "Inclined planes and friction", "child_data": [{"kind": "Video", "id": "123032796"}, {"kind": "Video", "id": "123032792"}, {"kind": "Video", "id": "123032795"}, {"kind": "Video", "id": "123032797"}, {"kind": "Video", "id": "123032794"}, {"kind": "Video", "id": "123032798"}, {"kind": "Video", "id": "123032793"}], "children": [{"path": "khan/science/physics/forces-newtons-laws/inclined-planes-friction/inclined-plane-force-components/", "id": "TC23wD34C7k", "title": "Inclined plane force components", "kind": "Video", "description": "Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane", "slug": "inclined-plane-force-components"}, {"path": "khan/science/physics/forces-newtons-laws/inclined-planes-friction/ice-accelerating-down-an-incline/", "id": "Mz2nDXElcoM", "title": "Ice accelerating down an incline", "kind": "Video", "description": "Figuring out the acceleration of ice down a plane made of ice", "slug": "ice-accelerating-down-an-incline"}, {"path": "khan/science/physics/forces-newtons-laws/inclined-planes-friction/force-of-friction-keeping-the-block-stationary/", "id": "v8ODIMqbQ44", "title": "Force of friction keeping the block stationary", "kind": "Video", "description": "Block of wood kept stationary by the force of friction (Correction made in next video)", "slug": "force-of-friction-keeping-the-block-stationary"}, {"path": "khan/science/physics/forces-newtons-laws/inclined-planes-friction/correction-of-force-of-friction-keeping-the-block-stationary/", "id": "BukTc4q9BMc", "title": "Correction to force of friction keeping the block stationary", "kind": "Video", "description": "Correction to Force of Friction Keeping the Block Stationary", "slug": "correction-of-force-of-friction-keeping-the-block-stationary"}, {"path": "khan/science/physics/forces-newtons-laws/inclined-planes-friction/force-of-friction-keeping-velocity-constant/", "id": "iA7Thhnzc64", "title": "Force of friction keeping velocity constant", "kind": "Video", "description": "Calculating the coefficient of kinetic friction (correction made in next video)", "slug": "force-of-friction-keeping-velocity-constant"}, {"path": "khan/science/physics/forces-newtons-laws/inclined-planes-friction/intuition-on-static-and-kinetic-friction-comparisons/", "id": "J9BWNiOSGlc", "title": "Intuition on static and kinetic friction comparisons", "kind": "Video", "description": "Why static friction is harder to overcome than kinetic friction", "slug": "intuition-on-static-and-kinetic-friction-comparisons"}, {"path": "khan/science/physics/forces-newtons-laws/inclined-planes-friction/static-and-kinetic-friction-example/", "id": "ZA_D4O6l1lo", "title": "Static and kinetic friction example", "kind": "Video", "description": "Thinking about the coefficients of static and kinetic friction", "slug": "static-and-kinetic-friction-example"}], "in_knowledge_map": false, "description": "We've all slid down slides/snow-or-mud-covered-hills/railings at some point in our life (if not, you haven't really lived) and noticed that the smoother the surface the more we would accelerate (try to slide down a non-snow-or-mud-covered hill). This tutorial looks into this in some depth. We'll look at masses on inclined planes and think about static and kinetic friction.", "node_slug": "inclined-planes-friction", "render_type": "Tutorial", "topic_page_url": "/science/physics/forces-newtons-laws/inclined-planes-friction", "extended_slug": "science/physics/forces-newtons-laws/inclined-planes-friction", "kind": "Topic", "slug": "inclined-planes-friction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/forces-newtons-laws/tension-tutorial/", "id": "tension-tutorial", "hide": false, "title": "Tension", "child_data": [{"kind": "Video", "id": "xaed62b87"}, {"kind": "Video", "id": "x14733d70"}, {"kind": "Video", "id": "x4751379c"}, {"kind": "Video", "id": "25561"}, {"kind": "Video", "id": "25563"}, {"kind": "Video", "id": "25573"}], "children": [{"path": "khan/science/physics/forces-newtons-laws/tension-tutorial/the-force-of-tension/", "id": "3V4Dg6AmI6A", "title": "The force of tension", "kind": "Video", "description": "David explains what the force of tension is, how to solve for it, and some common misconceptions involving the force of tension.", "slug": "the-force-of-tension"}, {"path": "khan/science/physics/forces-newtons-laws/tension-tutorial/mild-and-medium-tension/", "id": "4qWdhOcTmeI", "title": "Mild and medium tension", "kind": "Video", "description": "David explains how to solve tension problems for hanging objects.", "slug": "mild-and-medium-tension"}, {"path": "khan/science/physics/forces-newtons-laws/tension-tutorial/super-hot-tension/", "id": "M_VqY1rf3UA", "title": "Super hot tension", "kind": "Video", "description": "David shows how to solve a super hot tension problem where a can of peppers hangs from two diagonal strings.", "slug": "super-hot-tension"}, {"path": "khan/science/physics/forces-newtons-laws/tension-tutorial/introduction-to-tension/", "id": "_UrfHFEBIpU", "title": "Introduction to tension", "kind": "Video", "description": "An introduction to tension. Solving for the tension(s) in a set of wires when a weight is hanging from them.", "slug": "introduction-to-tension"}, {"path": "khan/science/physics/forces-newtons-laws/tension-tutorial/tension-part-2/", "id": "zwDJ1wVr7Is", "title": "Introduction to tension (part 2)", "kind": "Video", "description": "A slightly more difficult tension problem.", "slug": "tension-part-2"}, {"path": "khan/science/physics/forces-newtons-laws/tension-tutorial/tension-in-an-accelerating-system-and-pie-in-the-face/", "id": "52wxpYnS64U", "title": "Tension in an accelerating system and pie in the face", "kind": "Video", "description": "The second part to the complicated problem. We figure out the tension in the wire connecting the two masses. Then we figure our how much we need to accelerate a pie for it to safely reach a man's face.", "slug": "tension-in-an-accelerating-system-and-pie-in-the-face"}], "in_knowledge_map": false, "description": "Bad commute? Baby crying? Bills to pay? Looking to take a bath with some Calgon (do a search on YouTube for context) to ease your tension? This tutorial has nothing (actually little, not nothing) to do with that.\n\nSo far, most of the forces we've been dealing with are forces of \"pushing\"--contact forces at the macro level because of atoms not wanting to get to close at the micro level. Now we'll deal with \"pulling\" force or tension (at a micro level this is the force of attraction between bonded atoms).", "node_slug": "tension-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/physics/forces-newtons-laws/tension-tutorial", "extended_slug": "science/physics/forces-newtons-laws/tension-tutorial", "kind": "Topic", "slug": "tension-tutorial"}], "in_knowledge_map": false, "description": "This tutorial is the meat of much of classical physics. We think about what a force is and how Newton changed the world's (and possibly your) view of how reality works.", "node_slug": "forces-newtons-laws", "render_type": "Topic", "topic_page_url": "/science/physics/forces-newtons-laws", "extended_slug": "science/physics/forces-newtons-laws", "kind": "Topic", "slug": "forces-newtons-laws"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/work-and-energy/", "id": "work-and-energy", "hide": false, "title": "Work and energy", "child_data": [{"kind": "Topic", "id": "x5db497e8"}, {"kind": "Topic", "id": "x839d14d0"}, {"kind": "Topic", "id": "x13b3934d"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/", "id": "work-and-energy-tutorial", "hide": false, "title": "Work and energy", "child_data": [{"kind": "Video", "id": "25587"}, {"kind": "Video", "id": "25589"}, {"kind": "Video", "id": "x4302d2d1"}, {"kind": "Video", "id": "x19f2d6c4"}, {"kind": "Video", "id": "xe52a1e85"}, {"kind": "Video", "id": "25593"}, {"kind": "Video", "id": "25591"}, {"kind": "Video", "id": "x7ed35f44"}, {"kind": "Video", "id": "x3e147b11"}], "children": [{"path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/introduction-to-work-and-energy/", "id": "2WS1sG9fhOk", "title": "Introduction to work and energy", "kind": "Video", "description": "Introduction to work and energy", "slug": "introduction-to-work-and-energy"}, {"path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/work-and-energy-part-2/", "id": "3mier94pbnU", "title": "Work and energy (part 2)", "kind": "Video", "description": "More on work. Introduction to Kinetic and Potential Energies.", "slug": "work-and-energy-part-2"}, {"path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/work-and-the-work-energy-principle/", "id": "30o4omX5qfo", "title": "Work and the work-energy principle", "kind": "Video", "slug": "work-and-the-work-energy-principle"}, {"path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/work-as-the-transfer-of-energy/", "id": "sZG-zHkGR4U", "title": "Work as the transfer of energy", "kind": "Video", "slug": "work-as-the-transfer-of-energy"}, {"path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/work-example-problems/", "id": "udgMh3Y-dTk", "title": "Work example problems", "kind": "Video", "slug": "work-example-problems"}, {"path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/work-energy-problem-with-friction/", "id": "YvacYWgygaA", "title": "Work/energy problem with friction", "kind": "Video", "description": "A conservation of energy problem where all of the energy is not conserved.", "slug": "work-energy-problem-with-friction"}, {"path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/conservation-of-energy/", "id": "kw_4Loo1HR4", "title": "Conservation of energy", "kind": "Video", "description": "Using the law of conservation of energy to see how potential energy is converted into kinetic energy", "slug": "conservation-of-energy"}, {"path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/conservative-forces/", "id": "qWR7SBsnLwo", "title": "Conservative forces", "kind": "Video", "slug": "conservative-forces"}, {"path": "khan/science/physics/work-and-energy/work-and-energy-tutorial/power/", "id": "RpbxIG5HTf4", "title": "Power", "kind": "Video", "slug": "power"}], "in_knowledge_map": false, "description": "You're doing a lot more work than you realize (most of which goes unpaid). This tutorial will have you seeing the world in terms of potentials and energy and work (which is more fun than you can possibly imagine).", "node_slug": "work-and-energy-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/physics/work-and-energy/work-and-energy-tutorial", "extended_slug": "science/physics/work-and-energy/work-and-energy-tutorial", "kind": "Topic", "slug": "work-and-energy-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/work-and-energy/mechanical-advantage/", "id": "mechanical-advantage", "hide": false, "title": "Mechanical advantage", "child_data": [{"kind": "Video", "id": "25595"}, {"kind": "Video", "id": "25597"}, {"kind": "Video", "id": "25599"}], "children": [{"path": "khan/science/physics/work-and-energy/mechanical-advantage/introduction-to-mechanical-advantage/", "id": "pfzJ-z5Ij48", "title": "Introduction to mechanical advantage", "kind": "Video", "description": "Introduction to simple machines, mechanical advantage and moments.", "slug": "introduction-to-mechanical-advantage"}, {"path": "khan/science/physics/work-and-energy/mechanical-advantage/mechanical-advantage-part-2/", "id": "DiBXxWBrV24", "title": "Mechanical advantage (part 2)", "kind": "Video", "description": "More on mechanical advantage, levers and moments.", "slug": "mechanical-advantage-part-2"}, {"path": "khan/science/physics/work-and-energy/mechanical-advantage/mechanical-advantage-part-3/", "id": "vSsK7Rfa3yA", "title": "Mechanical advantage (part 3)", "kind": "Video", "description": "Introduction to pulleys and wedges", "slug": "mechanical-advantage-part-3"}], "in_knowledge_map": false, "description": "If you have ever used a tool of any kind (including the bones in your body), you have employed mechanical advantage. Whether you used an incline plane to drag something off of a pick-up truck, or the back of a hammer to remove a nail, the world of mechanical advantage surrounds us.", "node_slug": "mechanical-advantage", "render_type": "Tutorial", "topic_page_url": "/science/physics/work-and-energy/mechanical-advantage", "extended_slug": "science/physics/work-and-energy/mechanical-advantage", "kind": "Topic", "slug": "mechanical-advantage"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/work-and-energy/hookes-law/", "id": "hookes-law", "hide": false, "title": "Springs and Hooke's law", "child_data": [{"kind": "Video", "id": "25637"}, {"kind": "Video", "id": "25639"}, {"kind": "Video", "id": "25641"}], "children": [{"path": "khan/science/physics/work-and-energy/hookes-law/intro-to-springs-and-hooke-s-law/", "id": "ZzwuHS9ldbY", "title": "Intro to springs and Hooke's law", "kind": "Video", "description": "Introduction to Hooke's Law", "slug": "intro-to-springs-and-hooke-s-law"}, {"path": "khan/science/physics/work-and-energy/hookes-law/potential-energy-stored-in-a-spring/", "id": "eVl5zs6Lqy0", "title": "Potential energy stored in a spring", "kind": "Video", "description": "Work needed to compress a spring is the same thing as the potential energy stored in the compressed spring.", "slug": "potential-energy-stored-in-a-spring"}, {"path": "khan/science/physics/work-and-energy/hookes-law/spring-potential-energy-example-mistake-in-math/", "id": "P3QV9ktuYlQ", "title": "Spring potential energy example (mistake in math)", "kind": "Video", "description": "A spring, a frozen loop-d-loop and more! (See if you can find the mistake I made and get the right answer!)", "slug": "spring-potential-energy-example-mistake-in-math"}], "in_knowledge_map": false, "description": "Weighing machines of all sorts employ springs that take a certain amount of force to keep compressed or stretched to a certain point. Hooke's law will give us all the tools to weigh in on the subject ourselves and spring into action (yes, the puns are annoying us too)!", "node_slug": "hookes-law", "render_type": "Tutorial", "topic_page_url": "/science/physics/work-and-energy/hookes-law", "extended_slug": "science/physics/work-and-energy/hookes-law", "kind": "Topic", "slug": "hookes-law"}], "in_knowledge_map": false, "description": "Work and energy. Potential energy. Kinetic energy. Mechanical advantage. Springs and Hooke's law.", "node_slug": "work-and-energy", "render_type": "Topic", "topic_page_url": "/science/physics/work-and-energy", "extended_slug": "science/physics/work-and-energy", "kind": "Topic", "slug": "work-and-energy"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/linear-momentum/", "id": "linear-momentum", "hide": false, "title": "Impacts and linear momentum", "child_data": [{"kind": "Topic", "id": "x1393d93d"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/linear-momentum/momentum-tutorial/", "id": "momentum-tutorial", "hide": false, "title": "Momentum", "child_data": [{"kind": "Video", "id": "25579"}, {"kind": "Video", "id": "25581"}, {"kind": "Video", "id": "25583"}, {"kind": "Video", "id": "25585"}], "children": [{"path": "khan/science/physics/linear-momentum/momentum-tutorial/introduction-to-momentum/", "id": "XFhntPxow0U", "title": "Introduction to momentum", "kind": "Video", "description": "What momentum is. A simple problem involving momentum.", "slug": "introduction-to-momentum"}, {"path": "khan/science/physics/linear-momentum/momentum-tutorial/momentum-ice-skater-throws-a-ball/", "id": "vPkkCOlGND4", "title": "Momentum: Ice skater throws a ball", "kind": "Video", "description": "A simple conservation of momentum problem involving an ice skater and a ball", "slug": "momentum-ice-skater-throws-a-ball"}, {"path": "khan/science/physics/linear-momentum/momentum-tutorial/2-dimensional-momentum-problem/", "id": "CFygKiTB-4A", "title": "2-dimensional momentum problem", "kind": "Video", "description": "An example of conservation of momentum in two dimensions.", "slug": "2-dimensional-momentum-problem"}, {"path": "khan/science/physics/linear-momentum/momentum-tutorial/2-dimensional-momentum-problem-part-2/", "id": "leudxqivIJI", "title": "2-dimensional momentum problem (part 2)", "kind": "Video", "description": "We finish the 2-dimensional momentum problem", "slug": "2-dimensional-momentum-problem-part-2"}], "in_knowledge_map": false, "description": "Depending on your view of things, this may be the most violent of our tutorials. Things will crash and collide. We'll learn about momentum and how it is transferred. Whether you're playing pool (or \"billiards\") or deciding whether you want to get tackled by the 300lb. guy, this tutorial is of key importance.", "node_slug": "momentum-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/physics/linear-momentum/momentum-tutorial", "extended_slug": "science/physics/linear-momentum/momentum-tutorial", "kind": "Topic", "slug": "momentum-tutorial"}], "in_knowledge_map": false, "description": "Linear momentum. Conservation of momentum. Elastic collisions.", "node_slug": "linear-momentum", "render_type": "Topic", "topic_page_url": "/science/physics/linear-momentum", "extended_slug": "science/physics/linear-momentum", "kind": "Topic", "slug": "linear-momentum"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/torque-angular-momentum/", "id": "torque-angular-momentum", "hide": false, "title": "Moments, torque, and angular momentum", "child_data": [{"kind": "Topic", "id": "xf06d2087"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/torque-angular-momentum/torque-tutorial/", "id": "torque-tutorial", "hide": false, "title": "Torque, moments, and angular momentum", "child_data": [{"kind": "Video", "id": "25601"}, {"kind": "Video", "id": "25603"}, {"kind": "Video", "id": "25605"}, {"kind": "Video", "id": "25607"}, {"kind": "Video", "id": "398462562"}, {"kind": "Video", "id": "x94d14148"}, {"kind": "Video", "id": "x73bf035c"}, {"kind": "Video", "id": "25711"}], "children": [{"path": "khan/science/physics/torque-angular-momentum/torque-tutorial/center-of-mass/", "id": "VrflZifKIuw", "title": "Center of mass", "kind": "Video", "description": "Introduction to the center of mass", "slug": "center-of-mass"}, {"path": "khan/science/physics/torque-angular-momentum/torque-tutorial/introduction-to-torque/", "id": "QhuJn8YBtmg", "title": "Introduction to torque", "kind": "Video", "description": "An introduction to torque", "slug": "introduction-to-torque"}, {"path": "khan/science/physics/torque-angular-momentum/torque-tutorial/moments/", "id": "ESusD8HRLBI", "title": "Moments", "kind": "Video", "description": "Introduction to moments", "slug": "moments"}, {"path": "khan/science/physics/torque-angular-momentum/torque-tutorial/moments-part-2/", "id": "peXbz0frV74", "title": "Moments (part 2)", "kind": "Video", "description": "2 more moment problems.", "slug": "moments-part-2"}, {"path": "khan/science/physics/torque-angular-momentum/torque-tutorial/relationship-between-angular-velocity-and-speed/", "id": "zAx61CO5mDw", "title": "Relationship between angular velocity and speed", "kind": "Video", "description": "How angular velocity relates to speed", "slug": "relationship-between-angular-velocity-and-speed"}, {"path": "khan/science/physics/torque-angular-momentum/torque-tutorial/angular-momentum/", "id": "nFSMu3bxXVA", "title": "Angular momentum", "kind": "Video", "slug": "angular-momentum"}, {"path": "khan/science/physics/torque-angular-momentum/torque-tutorial/constant-angular-momentum-when-no-net-torque/", "id": "CbeCE1HoGfA", "title": "Constant angular momentum when no net torque", "kind": "Video", "slug": "constant-angular-momentum-when-no-net-torque"}, {"path": "khan/science/physics/torque-angular-momentum/torque-tutorial/cross-product-and-torque/", "id": "s38l6nmTrvM", "title": "Cross product and torque", "kind": "Video", "description": "The cross product and the direction of torque.", "slug": "cross-product-and-torque"}], "in_knowledge_map": false, "description": "Until this tutorial, we have been completely ignoring that things rotate. In this tutorial, we'll explore why they rotate and how they do it. It will leave your head spinning (no, it won't, but seemed like a fun thing to say given the subject matter).", "node_slug": "torque-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/physics/torque-angular-momentum/torque-tutorial", "extended_slug": "science/physics/torque-angular-momentum/torque-tutorial", "kind": "Topic", "slug": "torque-tutorial"}], "in_knowledge_map": false, "description": "Thinking about making things rotate. Center of mass, torque, moments and angular velocity.", "node_slug": "torque-angular-momentum", "render_type": "Topic", "topic_page_url": "/science/physics/torque-angular-momentum", "extended_slug": "science/physics/torque-angular-momentum", "kind": "Topic", "slug": "torque-angular-momentum"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/newton-gravitation/", "id": "newton-gravitation", "hide": false, "title": "Gravitation", "child_data": [{"kind": "Topic", "id": "x8c2c3627"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/newton-gravitation/gravity-newtonian/", "id": "gravity-newtonian", "hide": false, "title": "Newton's law of gravitation", "child_data": [{"kind": "Video", "id": "113633130"}, {"kind": "Video", "id": "116854912"}, {"kind": "Video", "id": "114445217"}, {"kind": "Video", "id": "116862364"}, {"kind": "Video", "id": "400139076"}, {"kind": "Video", "id": "400136157"}, {"kind": "Video", "id": "25633"}, {"kind": "Video", "id": "25635"}], "children": [{"path": "khan/science/physics/newton-gravitation/gravity-newtonian/introduction-to-gravity/", "id": "Xcel427Ezl0", "title": "Introduction to gravity", "kind": "Video", "description": "Basics of gravity and the Law of Universal Gravitation", "slug": "introduction-to-gravity"}, {"path": "khan/science/physics/newton-gravitation/gravity-newtonian/mass-and-weight-clarification/", "id": "IuBoeDihLUc", "title": "Mass and weight clarification", "kind": "Video", "description": "Difference between mass and weight", "slug": "mass-and-weight-clarification"}, {"path": "khan/science/physics/newton-gravitation/gravity-newtonian/gravity-for-astronauts-in-orbit/", "id": "oIZV-ixRTcY", "title": "Gravity for astronauts in orbit", "kind": "Video", "description": "Why do astronauts appear weightless despite being near the Earth?", "slug": "gravity-for-astronauts-in-orbit"}, {"path": "khan/science/physics/newton-gravitation/gravity-newtonian/would-a-brick-or-feather-fall-faster/", "id": "36Rym2q4H94", "title": "Would a brick or feather fall faster?", "kind": "Video", "description": "What would fall faster on the moon?", "slug": "would-a-brick-or-feather-fall-faster"}, {"path": "khan/science/physics/newton-gravitation/gravity-newtonian/acceleration-due-to-gravity-at-the-space-station/", "id": "R5CRZONOHCU", "title": "Acceleration due to gravity at the space station", "kind": "Video", "description": "What is the acceleration due to gravity at the space station", "slug": "acceleration-due-to-gravity-at-the-space-station"}, {"path": "khan/science/physics/newton-gravitation/gravity-newtonian/space-station-speed-in-orbit/", "id": "9BNkmfHYYYI", "title": "Space station speed in orbit", "kind": "Video", "description": "Speed necessary for the space station to stay in orbit", "slug": "space-station-speed-in-orbit"}, {"path": "khan/science/physics/newton-gravitation/gravity-newtonian/introduction-to-newton-s-law-of-gravitation/", "id": "391txUI76gM", "title": "Introduction to Newton's law of gravitation", "kind": "Video", "description": "A little bit on gravity", "slug": "introduction-to-newton-s-law-of-gravitation"}, {"path": "khan/science/physics/newton-gravitation/gravity-newtonian/gravitation-part-2/", "id": "8i0j3j16yFk", "title": "Gravitation (part 2)", "kind": "Video", "description": "A little bit more on gravity", "slug": "gravitation-part-2"}], "in_knowledge_map": false, "description": "Why are you sticking to your chair (ignoring the spilled glue)? Why does the earth orbit the sun (or does it)? How high could I throw my dog on the moon?\n\nGravitation defines our everyday life and the structure of the universe. This tutorial will introduce it to you in the Newtonian sense.", "node_slug": "gravity-newtonian", "render_type": "Tutorial", "topic_page_url": "/science/physics/newton-gravitation/gravity-newtonian", "extended_slug": "science/physics/newton-gravitation/gravity-newtonian", "kind": "Topic", "slug": "gravity-newtonian"}], "in_knowledge_map": false, "description": "Classical gravity. How masses attract each other (according to Newton).", "node_slug": "newton-gravitation", "render_type": "Topic", "topic_page_url": "/science/physics/newton-gravitation", "extended_slug": "science/physics/newton-gravitation", "kind": "Topic", "slug": "newton-gravitation"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/oscillatory-motion/", "id": "oscillatory-motion", "hide": false, "title": "Oscillatory motion", "child_data": [{"kind": "Topic", "id": "xd4d1cd3b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/oscillatory-motion/harmonic-motion/", "id": "harmonic-motion", "hide": false, "title": "Harmonic motion", "child_data": [{"kind": "Video", "id": "25643"}, {"kind": "Video", "id": "25645"}, {"kind": "Video", "id": "25647"}], "children": [{"path": "khan/science/physics/oscillatory-motion/harmonic-motion/introduction-to-harmonic-motion/", "id": "Nk2q-_jkJVs", "title": "Introduction to harmonic motion", "kind": "Video", "description": "Intuition behind the motion of a mass on a spring (some calculus near the end).", "slug": "introduction-to-harmonic-motion"}, {"path": "khan/science/physics/oscillatory-motion/harmonic-motion/harmonic-motion-part-2-calculus/", "id": "xoUppFlif04", "title": "Harmonic motion part 2 (calculus)", "kind": "Video", "description": "We test whether Acos(wt) can describe the motion of the mass on a spring by substituting into the differential equation F=-kx", "slug": "harmonic-motion-part-2-calculus"}, {"path": "khan/science/physics/oscillatory-motion/harmonic-motion/harmonic-motion-part-3-no-calculus/", "id": "oqBHBO8cqLI", "title": "Harmonic motion part 3 (no calculus)", "kind": "Video", "description": "Figuring out the period, frequency, and amplitude of the harmonic motion of a mass attached to a spring.", "slug": "harmonic-motion-part-3-no-calculus"}], "in_knowledge_map": false, "description": "Ever watch a slinky gyrate back and forth. This is harmonic motion (a special class of oscillatory motion). In this tutorial we'll see how we can model and deal with this type of phenomena.", "node_slug": "harmonic-motion", "render_type": "Tutorial", "topic_page_url": "/science/physics/oscillatory-motion/harmonic-motion", "extended_slug": "science/physics/oscillatory-motion/harmonic-motion", "kind": "Topic", "slug": "harmonic-motion"}], "in_knowledge_map": false, "description": "Pendulums. Slinkies. You when you have to use the bathroom but it is occupied. These all go back and forth over and over and over again. This tutorial explores this type of motion.", "node_slug": "oscillatory-motion", "render_type": "Topic", "topic_page_url": "/science/physics/oscillatory-motion", "extended_slug": "science/physics/oscillatory-motion", "kind": "Topic", "slug": "oscillatory-motion"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/physics/fluids/", "id": "fluids", "hide": false, "title": "Fluids", "child_data": [{"kind": "Topic", "id": "xfdad2439"}, {"kind": "Topic", "id": "x274a685b"}, {"kind": "Topic", "id": "xed607a1b"}, {"kind": "Topic", "id": "x6a5fe444"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/science/physics/fluids/skill-check-for-fluids/", "id": "skill-check-for-fluids", "hide": false, "title": "Skill check for fluids", "child_data": [{"kind": "Exercise", "id": "x39bd661b"}], "children": [{"path": "khan/science/physics/fluids/skill-check-for-fluids/fluids-skill-check/", "id": "fluids-skill-check", "title": "Skill check: Fluids", "description": "This is a skill check that can help you determine areas to focus on in fluids.", "slug": "fluids-skill-check", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This is a skill check that can help you determine what areas to review in fluids.", "node_slug": "skill-check-for-fluids", "render_type": "Tutorial", "topic_page_url": "/science/physics/fluids/skill-check-for-fluids", "extended_slug": "science/physics/fluids/skill-check-for-fluids", "kind": "Topic", "slug": "skill-check-for-fluids"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/fluids/density-and-pressure/", "id": "density-and-pressure", "hide": false, "title": "Density and Pressure", "child_data": [{"kind": "Video", "id": "xcdac65f7"}, {"kind": "Video", "id": "25649"}, {"kind": "Video", "id": "25651"}, {"kind": "Video", "id": "25653"}, {"kind": "Article", "id": "xe7397140"}, {"kind": "Video", "id": "25655"}], "children": [{"path": "khan/science/physics/fluids/density-and-pressure/specific-gravity/", "id": "nVPrWz8Jfgo", "title": "Specific gravity", "kind": "Video", "description": "In this video David explains what specific gravity means. He also shows how to calculate the value for specific gravity and use it to determine the percent of an object that will be submerged while floating.", "slug": "specific-gravity"}, {"path": "khan/science/physics/fluids/density-and-pressure/fluids-part-1/", "id": "Pn5YEMwQb4Y", "title": "Pressure and Pascal's principle (part 1)", "kind": "Video", "description": "Sal explains the difference between liquids and gasses (both fluids). He then starts a calculation of the work done on a liquid in a U-shaped container.", "slug": "fluids-part-1"}, {"path": "khan/science/physics/fluids/density-and-pressure/fluids-part-2/", "id": "lWDtFHDVqqk", "title": "Pressure and Pascal's principle (part 2)", "kind": "Video", "description": "Sal finishes the calculation or work to determine the mechanical advantage in a U-shaped tube. He also explains pressure and Pascal's Principal.", "slug": "fluids-part-2"}, {"path": "khan/science/physics/fluids/density-and-pressure/fluids-part-3/", "id": "5EWjlpc0S00", "title": "Pressure at a depth in a fluid", "kind": "Video", "description": "Sal derives the formula to determine the pressure at a specific depth in a fluid.", "slug": "fluids-part-3"}, {"path": "khan/science/physics/fluids/density-and-pressure/fluids-part-4/", "id": "i6gz9VFyYks", "title": "Finding height of fluid in a barometer", "kind": "Video", "description": "Using our understanding of fluid pressure to figure out the height of a column of mercury.", "slug": "fluids-part-4"}], "in_knowledge_map": false, "description": "", "node_slug": "density-and-pressure", "render_type": "Tutorial", "topic_page_url": "/science/physics/fluids/density-and-pressure", "extended_slug": "science/physics/fluids/density-and-pressure", "kind": "Topic", "slug": "density-and-pressure"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/fluids/buoyant-force-and-archimedes-principle/", "id": "buoyant-force-and-archimedes-principle", "hide": false, "title": "Buoyant Force and Archimedes' Principle", "child_data": [{"kind": "Video", "id": "25657"}, {"kind": "Article", "id": "xb9ebb5da"}, {"kind": "Video", "id": "25659"}], "children": [{"path": "khan/science/physics/fluids/buoyant-force-and-archimedes-principle/fluids-part-5/", "id": "vzID7ds600c", "title": "Archimedes principle and buoyant force", "kind": "Video", "description": "Introduction to Archimedes' principle and buoyant force.", "slug": "fluids-part-5"}, {"path": "khan/science/physics/fluids/buoyant-force-and-archimedes-principle/fluids-part-6/", "id": "wwjtuZ5vTvc", "title": "Buoyant force example problems", "kind": "Video", "description": "A couple of problems involving Archimedes' principle and buoyant forces.", "slug": "fluids-part-6"}], "in_knowledge_map": false, "description": "", "node_slug": "buoyant-force-and-archimedes-principle", "render_type": "Tutorial", "topic_page_url": "/science/physics/fluids/buoyant-force-and-archimedes-principle", "extended_slug": "science/physics/fluids/buoyant-force-and-archimedes-principle", "kind": "Topic", "slug": "buoyant-force-and-archimedes-principle"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/fluids/fluid-dynamics/", "id": "fluid-dynamics", "hide": false, "title": "Fluid Dynamics", "child_data": [{"kind": "Video", "id": "25661"}, {"kind": "Article", "id": "xf735671d"}, {"kind": "Video", "id": "25663"}, {"kind": "Video", "id": "25665"}, {"kind": "Video", "id": "25667"}, {"kind": "Video", "id": "25669"}, {"kind": "Video", "id": "25671"}, {"kind": "Article", "id": "x371f6b55"}, {"kind": "Video", "id": "x0934a85a"}, {"kind": "Video", "id": "x8b8f2b8c"}, {"kind": "Video", "id": "xb5f9185e"}, {"kind": "Video", "id": "x1bb34950"}], "children": [{"path": "khan/science/physics/fluids/fluid-dynamics/fluids-part-7/", "id": "G4CgOF4ccXk", "title": "Volume flow rate and equation of continuity", "kind": "Video", "description": "Sal introduces the notion of moving fluids and laminar flow. Then he uses the incompressibility of a liquid to show that the volume flow rate (flux) must remain constant. Sal then derives the equation of continuity in terms of the area and speed.", "slug": "fluids-part-7"}, {"path": "khan/science/physics/fluids/fluid-dynamics/fluids-part-8/", "id": "uqyLOuAzbvo", "title": "Bernoulli's equation (part 1)", "kind": "Video", "description": "This is the first of two videos where Sal derives Bernoulli's equation.", "slug": "fluids-part-8"}, {"path": "khan/science/physics/fluids/fluid-dynamics/fluids-part-9/", "id": "QX2YLR09Q78", "title": "Bernoulli's equation (part 2)", "kind": "Video", "description": "This is the second of two videos where Sal derives Bernoulli's equation. In the second half of the video Sal also begins an example problem where liquid exits a hole in a container.", "slug": "fluids-part-9"}, {"path": "khan/science/physics/fluids/fluid-dynamics/fluids-part-10/", "id": "NGpJPz44JYc", "title": "Bernoulli's equation (part 3)", "kind": "Video", "description": "Sal finishes the example problem where liquid exits a hole in a container.", "slug": "fluids-part-10"}, {"path": "khan/science/physics/fluids/fluid-dynamics/fluids-part-11/", "id": "HnfBFeLunk4", "title": "Bernoulli's equation (part 4)", "kind": "Video", "description": "Clarification of, and more thoughts on, the Bernoulli's equation example problem where liquid exits a hole in a container.", "slug": "fluids-part-11"}, {"path": "khan/science/physics/fluids/fluid-dynamics/fluids-part-12/", "id": "xlJYYM5TWoA", "title": "Bernoulli's example problem", "kind": "Video", "description": "Sal solves a Bernoulli's equation example problem where fluid is moving through a pipe of varying diameter.", "slug": "fluids-part-12"}, {"path": "khan/science/physics/fluids/fluid-dynamics/viscosity-and-poiseuille-flow/", "id": "G3bO8RcRgxQ", "title": "Viscosity and Poiseuille flow", "kind": "Video", "description": "David explains the concept of viscosity, viscous force, and Poiseuille's law.", "slug": "viscosity-and-poiseuille-flow"}, {"path": "khan/science/physics/fluids/fluid-dynamics/turbulence-at-high-velocities-and-reynolds-number/", "id": "ZcaPndok1hc", "title": "Turbulence at high velocities and Reynold's number", "kind": "Video", "description": "In this video David explains how the Reynold's number allows you to determine the speed at which fluid flow becomes turbulent.", "slug": "turbulence-at-high-velocities-and-reynolds-number"}, {"path": "khan/science/physics/fluids/fluid-dynamics/venturi-effect-and-pitot-tubes/", "id": "Qz1g6kqvUG8", "title": "Venturi effect and Pitot tubes", "kind": "Video", "description": "David explains the Venturi effect and the role and function of Pitot tubes.", "slug": "venturi-effect-and-pitot-tubes"}, {"path": "khan/science/physics/fluids/fluid-dynamics/surface-tension-and-adhesion/", "id": "pmagWO-kQ0M", "title": "Surface Tension and Adhesion", "kind": "Video", "description": "David explains the concepts of surface tension, cohesion, and adhesion.", "slug": "surface-tension-and-adhesion"}], "in_knowledge_map": false, "description": "", "node_slug": "fluid-dynamics", "render_type": "Tutorial", "topic_page_url": "/science/physics/fluids/fluid-dynamics", "extended_slug": "science/physics/fluids/fluid-dynamics", "kind": "Topic", "slug": "fluid-dynamics"}], "in_knowledge_map": false, "description": "Atmospheric pressure is like an invisible friend who is always squeezing you with a big hug. Learn more about pressure, buoyant force, and flowing fluid so you can appreciate the sometimes invisible, but crucial, effect they have on us and the world around us.", "node_slug": "fluids", "render_type": "Topic", "topic_page_url": "/science/physics/fluids", "extended_slug": "science/physics/fluids", "kind": "Topic", "slug": "fluids"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/thermodynamics/", "id": "thermodynamics", "hide": false, "title": "Thermodynamics", "child_data": [{"kind": "Topic", "id": "x97f868e4"}, {"kind": "Topic", "id": "x82b8abb3"}, {"kind": "Topic", "id": "x378f7e34"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/", "id": "temp-kinetic-theory-ideal-gas-law", "hide": false, "title": "Temperature, kinetic theory, and the ideal gas law", "child_data": [{"kind": "Video", "id": "25673"}, {"kind": "Video", "id": "25675"}, {"kind": "Video", "id": "25677"}, {"kind": "Video", "id": "25679"}, {"kind": "Video", "id": "25681"}, {"kind": "Video", "id": "x7abce25c"}], "children": [{"path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/thermodynamics-part-1/", "id": "tQcB9BLUoVI", "title": "Thermodynamics part 1: Molecular theory of gases", "kind": "Video", "description": "Intuition of how gases generate pressure in a container and why pressure x volume is proportional to the combined kinetic energy of the molecules in the volume.", "slug": "thermodynamics-part-1"}, {"path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/thermodynamics-part-2/", "id": "x34OTtDE5q8", "title": "Thermodynamics part 2: Ideal gas law", "kind": "Video", "description": "To begin, Sal solves a constant temperature problem using PV=PV. Then he relates temperature to kinetic energy of a gas. In the second half of the video, he derives the ideal gas law.", "slug": "thermodynamics-part-2"}, {"path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/thermodynamics-part-3/", "id": "HvYUKRMT0VI", "title": "Thermodynamics part 3: Kelvin scale and Ideal gas law example", "kind": "Video", "description": "Sal makes the case for the Kelvin scale of temperature and absolute zero by showing that temperature is proportional to kinetic energy. Then he explains that you need to use the Kelvin scale in the ideal gas law. To finish he does a sample ideal gas law problem.", "slug": "thermodynamics-part-3"}, {"path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/thermodynamics-part-4/", "id": "5B1i26dUwME", "title": "Thermodynamics part 4: Moles and the ideal gas law", "kind": "Video", "description": "Sal explains the concept of a mole. Then he derives the molar version of the ideal gas law PV=nRT, where the gas constant R=831 J/molK.", "slug": "thermodynamics-part-4"}, {"path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/thermodynamics-part-5/", "id": "UekR9J31a2o", "title": "Thermodynamics part 5: Molar ideal gas law problem", "kind": "Video", "description": "Sal uses the molar version of the ideal gas law to solve for the number of moles in a gas. He also shows how to convert this answer into number of molecules using Avogadro's number.", "slug": "thermodynamics-part-5"}, {"path": "khan/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law/maxwell-boltzmann-distribution/", "id": "xQ9D4Jz95-A", "title": "Maxwell Boltzmann distribution", "kind": "Video", "description": "Using the Maxwell-Boltzmann distribution to visualize the distribution of speeds of particles at different temperatures.", "slug": "maxwell-boltzmann-distribution"}], "in_knowledge_map": false, "description": "", "node_slug": "temp-kinetic-theory-ideal-gas-law", "render_type": "Tutorial", "topic_page_url": "/science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law", "extended_slug": "science/physics/thermodynamics/temp-kinetic-theory-ideal-gas-law", "kind": "Topic", "slug": "temp-kinetic-theory-ideal-gas-law"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/thermodynamics/specific-heat-and-heat-transfer/", "id": "specific-heat-and-heat-transfer", "hide": false, "title": "Specific heat and heat transfer", "child_data": [{"kind": "Video", "id": "xf8a20837"}, {"kind": "Video", "id": "x0a625c68"}, {"kind": "Video", "id": "xfc126642"}, {"kind": "Video", "id": "x0e78c0c9"}, {"kind": "Video", "id": "x489729f6"}], "children": [{"path": "khan/science/physics/thermodynamics/specific-heat-and-heat-transfer/specific-heat-and-latent-leat-of-fusion-and-vaporization-2/", "id": "WU7TfO-iaK8", "title": "Specific heat and latent leat of fusion and vaporization", "kind": "Video", "description": "Defining specific heat, heat of fusion, and heat of vaporization. How to calculate the amount of heat to change the temperature of water and the energy required to change for a phase change.", "slug": "specific-heat-and-latent-leat-of-fusion-and-vaporization-2"}, {"path": "khan/science/physics/thermodynamics/specific-heat-and-heat-transfer/thermal-conduction-convection-and-radiation/", "id": "8GQvMt-ow4w", "title": "Thermal conduction, convection, and radiation", "kind": "Video", "description": "Fire as thermal conduction, convection, and radiation", "slug": "thermal-conduction-convection-and-radiation"}, {"path": "khan/science/physics/thermodynamics/specific-heat-and-heat-transfer/thermal-conduction/", "id": "PA-T6lMxCBI", "title": "Thermal conduction", "kind": "Video", "description": "Intuition behind how heat gets transferred through thermal conduction.", "slug": "thermal-conduction"}, {"path": "khan/science/physics/thermodynamics/specific-heat-and-heat-transfer/thermal-conductivity-of-metal-and-wood/", "id": "6f553BGaufI", "title": "Thermal conductivity of metal and wood", "kind": "Video", "description": "Why metal at room temperature feels cooler than wood at room temperature.", "slug": "thermal-conductivity-of-metal-and-wood"}, {"path": "khan/science/physics/thermodynamics/specific-heat-and-heat-transfer/intuition-behind-formula-for-thermal-conductivity/", "id": "hDP6egLrsdM", "title": "Intuition behind formula for thermal conductivity", "kind": "Video", "description": "Intuition behind formula for thermal conductivity", "slug": "intuition-behind-formula-for-thermal-conductivity"}], "in_knowledge_map": false, "description": "", "node_slug": "specific-heat-and-heat-transfer", "render_type": "Tutorial", "topic_page_url": "/science/physics/thermodynamics/specific-heat-and-heat-transfer", "extended_slug": "science/physics/thermodynamics/specific-heat-and-heat-transfer", "kind": "Topic", "slug": "specific-heat-and-heat-transfer"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/", "id": "laws-of-thermodynamics", "hide": false, "title": "Laws of thermodynamics", "child_data": [{"kind": "Video", "id": "412024"}, {"kind": "Video", "id": "374055"}, {"kind": "Video", "id": "418015"}, {"kind": "Video", "id": "375068"}, {"kind": "Video", "id": "376041"}, {"kind": "Video", "id": "424005"}, {"kind": "Video", "id": "364065"}, {"kind": "Video", "id": "391045"}, {"kind": "Video", "id": "431006"}, {"kind": "Video", "id": "421008"}, {"kind": "Video", "id": "426007"}, {"kind": "Video", "id": "379050"}, {"kind": "Video", "id": "388058"}, {"kind": "Video", "id": "397057"}, {"kind": "Video", "id": "370051"}, {"kind": "Video", "id": "371060"}, {"kind": "Video", "id": "392046"}, {"kind": "Video", "id": "429006"}, {"kind": "Video", "id": "376042"}], "children": [{"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/macrostates-and-microstates/", "id": "5EU-y1VF7g4", "title": "Macrostates and microstates", "kind": "Video", "description": "The difference between macrostates and microstates. Thermodynamic equilibrium.", "slug": "macrostates-and-microstates"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/quasistatic-and-reversible-processes/", "id": "lKq-10ysDb4", "title": "Quasistatic and reversible processes", "kind": "Video", "description": "Using theoretically quasi-static and/or reversible processes to stay pretty much at equilibrium.", "slug": "quasistatic-and-reversible-processes"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/first-law-of-thermodynamics-internal-energy/", "id": "Xb05CaG7TsQ", "title": "First law of thermodynamics / internal energy", "kind": "Video", "description": "First law of thermodynamic and Internal Energy", "slug": "first-law-of-thermodynamics-internal-energy"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/more-on-internal-energy/", "id": "aOSlXuDO4UU", "title": "More on internal energy", "kind": "Video", "description": "Getting more intuition of internal energy, heat, and work. Examples of using the first law to calculate work.", "slug": "more-on-internal-energy"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/work-from-expansion/", "id": "obeGVTOZyfE", "title": "Work from expansion", "kind": "Video", "description": "How a system can do work by expanding", "slug": "work-from-expansion"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/pv-diagrams-and-expansion-work/", "id": "M5uOIy-JTmo", "title": "PV-diagrams and expansion work", "kind": "Video", "description": "Why work from expansion is the area under the curve of a PV-diagram. Why heat is not a state function and internal energy is a state function.", "slug": "pv-diagrams-and-expansion-work"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/proof-u-3-2-pv-or-u-3-2-nrt/", "id": "qSFY7GKhSRs", "title": "Proof: U = (3/2)PV or U = (3/2)nRT", "kind": "Video", "description": "Conceptual proof that the internal energy of an ideal gas system is 3/2 PV.", "slug": "proof-u-3-2-pv-or-u-3-2-nrt"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/work-done-by-isothermic-process/", "id": "iiFWoXQPOJc", "title": "Work done by isothermic process", "kind": "Video", "description": "Isothermic and adiabatic processes. Calculating the work done by an isothermic process and seeing that it is the same as the heat added.", "slug": "work-done-by-isothermic-process"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/carnot-cycle-and-carnot-engine/", "id": "aAfBSJObd6Y", "title": "Carnot cycle and Carnot engine", "kind": "Video", "description": "Introduction to the Carnot cycle and Carnot heat engine", "slug": "carnot-cycle-and-carnot-engine"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/proof-s-or-entropy-is-a-valid-state-variable/", "id": "sPz5RrFus1Q", "title": "Proof: S (or entropy) is a valid state variable", "kind": "Video", "description": "Proof that S (or entropy) is a valid state variable.", "slug": "proof-s-or-entropy-is-a-valid-state-variable"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/proof-volume-ratios-in-a-carnot-cycle/", "id": "ixRtSV3CXPA", "title": "Proof: Volume ratios in a carnot cycle", "kind": "Video", "description": "Proof of the volume ratios in a Carnot Cycle", "slug": "proof-volume-ratios-in-a-carnot-cycle"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/thermodynamic-entropy-definition-clarification/", "id": "PFcGiMLwjeY", "title": "Thermodynamic entropy definition clarification", "kind": "Video", "description": "Clarifying that the thermodynamic definition of Entropy requires a reversible system.", "slug": "thermodynamic-entropy-definition-clarification"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/reconciling-thermodynamic-and-state-definitions-of-entropy/", "id": "WLKEVfLFau4", "title": "Reconciling thermodynamic and state definitions of entropy", "kind": "Video", "description": "Long video explaining why entropy is a measure of the number of states a system can take on (mathy, but mind-blowing).", "slug": "reconciling-thermodynamic-and-state-definitions-of-entropy"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/entropy-intuition/", "id": "xJf6pHqLzs0", "title": "Entropy intuition", "kind": "Video", "description": "A discussion of what entropy is and what it isn't.", "slug": "entropy-intuition"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/maxwell-s-demon/", "id": "aKRDvSZ-igA", "title": "Maxwell's demon", "kind": "Video", "description": "Maxwell's Demon: A thought experiment that seems to defy the 2nd Law of Thermodynamics", "slug": "maxwell-s-demon"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/more-on-entropy/", "id": "dFFzAP2OZ3E", "title": "More on entropy", "kind": "Video", "description": "More clarification as to what entropy is and what entropy is not.", "slug": "more-on-entropy"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/efficiency-of-a-carnot-engine/", "id": "M_5KYncYNyc", "title": "Efficiency of a Carnot engine", "kind": "Video", "description": "Definition of efficiency for a heat engine. Efficiency of a Carnot Engine.", "slug": "efficiency-of-a-carnot-engine"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/carnot-efficiency-2-reversing-the-cycle/", "id": "pQWwP7YYH6o", "title": "Carnot efficiency 2: Reversing the cycle", "kind": "Video", "description": "Seeing how we can scale and or reverse a Carnot Engine (to make a refrigerator)", "slug": "carnot-efficiency-2-reversing-the-cycle"}, {"path": "khan/science/physics/thermodynamics/laws-of-thermodynamics/carnot-efficiency-3-proving-that-it-is-the-most-efficient/", "id": "LUoUb4hGMH8", "title": "Carnot efficiency 3: Proving that it is the most efficient", "kind": "Video", "description": "Proving that a Carnot Engine is the most efficient engine", "slug": "carnot-efficiency-3-proving-that-it-is-the-most-efficient"}], "in_knowledge_map": false, "description": "", "node_slug": "laws-of-thermodynamics", "render_type": "Tutorial", "topic_page_url": "/science/physics/thermodynamics/laws-of-thermodynamics", "extended_slug": "science/physics/thermodynamics/laws-of-thermodynamics", "kind": "Topic", "slug": "laws-of-thermodynamics"}], "in_knowledge_map": false, "description": "", "node_slug": "thermodynamics", "render_type": "Topic", "topic_page_url": "/science/physics/thermodynamics", "extended_slug": "science/physics/thermodynamics", "kind": "Topic", "slug": "thermodynamics"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/electricity-magnetism/", "id": "electricity-magnetism", "hide": false, "title": "Electricity and magnetism", "child_data": [{"kind": "Topic", "id": "x959dbd8f"}, {"kind": "Topic", "id": "xac224369"}, {"kind": "Topic", "id": "x68a6b806"}, {"kind": "Topic", "id": "x0242d288"}, {"kind": "Topic", "id": "x18832ac8"}, {"kind": "Topic", "id": "x3015377d"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/electricity-magnetism/charge-electric-force/", "id": "charge-electric-force", "hide": false, "title": "Charge and electric force (Coulomb's law)", "child_data": [{"kind": "Video", "id": "x6f14be01"}, {"kind": "Video", "id": "x650c1508"}, {"kind": "Video", "id": "x337984d0"}, {"kind": "Video", "id": "x7abf73f6"}], "children": [{"path": "khan/science/physics/electricity-magnetism/charge-electric-force/triboelectric-effect-and-charge/", "id": "IDQYakHRAG8", "title": "Triboelectric effect and charge", "kind": "Video", "slug": "triboelectric-effect-and-charge"}, {"path": "khan/science/physics/electricity-magnetism/charge-electric-force/coulombs-law/", "id": "2GQTfpDE9DQ", "title": "Coulomb's Law", "kind": "Video", "slug": "coulombs-law"}, {"path": "khan/science/physics/electricity-magnetism/charge-electric-force/conductors-and-insulators/", "id": "ZgDIX2GOaxQ", "title": "Conductors and Insulators", "kind": "Video", "slug": "conductors-and-insulators"}, {"path": "khan/science/physics/electricity-magnetism/charge-electric-force/conservation-of-charge/", "id": "Sn5CwAODVdI", "title": "Conservation of Charge", "kind": "Video", "slug": "conservation-of-charge"}], "in_knowledge_map": false, "description": "", "node_slug": "charge-electric-force", "render_type": "Tutorial", "topic_page_url": "/science/physics/electricity-magnetism/charge-electric-force", "extended_slug": "science/physics/electricity-magnetism/charge-electric-force", "kind": "Topic", "slug": "charge-electric-force"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/electricity-magnetism/electric-field/", "id": "electric-field", "hide": false, "title": "Electric field", "child_data": [{"kind": "Video", "id": "25685"}, {"kind": "Video", "id": "25687"}, {"kind": "Video", "id": "25689"}], "children": [{"path": "khan/science/physics/electricity-magnetism/electric-field/electrostatics-part-2/", "id": "0YOGrTNgGhE", "title": "Electric field", "kind": "Video", "description": "Electric Fields", "slug": "electrostatics-part-2"}, {"path": "khan/science/physics/electricity-magnetism/electric-field/proof-advanced-field-from-infinite-plate-part-1/", "id": "prLfVucoxpw", "title": "Proof (advanced): Field from infinite plate (part 1)", "kind": "Video", "description": "Electric field generated by a uniformly charged, infinite plate", "slug": "proof-advanced-field-from-infinite-plate-part-1"}, {"path": "khan/science/physics/electricity-magnetism/electric-field/proof-advanced-field-from-infinite-plate-part-2/", "id": "TxwE4_dXo8s", "title": "Proof (advanced): Field from infinite plate (part 2)", "kind": "Video", "description": "We see that the infinite, uniformly charged plate generates a constant electric field (independent of the height above the plate)", "slug": "proof-advanced-field-from-infinite-plate-part-2"}], "in_knowledge_map": false, "description": "", "node_slug": "electric-field", "render_type": "Tutorial", "topic_page_url": "/science/physics/electricity-magnetism/electric-field", "extended_slug": "science/physics/electricity-magnetism/electric-field", "kind": "Topic", "slug": "electric-field"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/electricity-magnetism/electric-potential-voltage/", "id": "electric-potential-voltage", "hide": false, "title": "Electric potential energy, electric potential, and voltage", "child_data": [{"kind": "Video", "id": "25691"}, {"kind": "Video", "id": "25693"}, {"kind": "Video", "id": "25695"}, {"kind": "Video", "id": "xac18fc84"}], "children": [{"path": "khan/science/physics/electricity-magnetism/electric-potential-voltage/electric-potential-energy/", "id": "elJUghWSVh4", "title": "Electric potential energy", "kind": "Video", "description": "Introduction to electric potential", "slug": "electric-potential-energy"}, {"path": "khan/science/physics/electricity-magnetism/electric-potential-voltage/electric-potential-energy-part-2-involves-calculus/", "id": "CqsYCIjSm9A", "title": "Electric potential energy (part 2-- involves calculus)", "kind": "Video", "description": "Electric potential energy difference in a varying field", "slug": "electric-potential-energy-part-2-involves-calculus"}, {"path": "khan/science/physics/electricity-magnetism/electric-potential-voltage/voltage/", "id": "zqGvUbvVQXg", "title": "Voltage", "kind": "Video", "description": "Difference between electrical potential (voltage) and electrical potential energy", "slug": "voltage"}, {"path": "khan/science/physics/electricity-magnetism/electric-potential-voltage/electric-potential-at-a-point-in-space/", "id": "ks1B1_umFk8", "title": "Electric potential at a point in space", "kind": "Video", "slug": "electric-potential-at-a-point-in-space"}], "in_knowledge_map": false, "description": "", "node_slug": "electric-potential-voltage", "render_type": "Tutorial", "topic_page_url": "/science/physics/electricity-magnetism/electric-potential-voltage", "extended_slug": "science/physics/electricity-magnetism/electric-potential-voltage", "kind": "Topic", "slug": "electric-potential-voltage"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/electricity-magnetism/magnets-magnetic/", "id": "magnets-magnetic", "hide": false, "title": "Magnets and Magnetic Force", "child_data": [{"kind": "Video", "id": "25713"}, {"kind": "Video", "id": "25715"}, {"kind": "Video", "id": "25707"}, {"kind": "Video", "id": "25709"}, {"kind": "Video", "id": "25717"}, {"kind": "Video", "id": "25719"}, {"kind": "Video", "id": "25721"}], "children": [{"path": "khan/science/physics/electricity-magnetism/magnets-magnetic/introduction-to-magnetism/", "id": "8Y4JSp5U82I", "title": "Introduction to magnetism", "kind": "Video", "description": "An introduction to magnetism", "slug": "introduction-to-magnetism"}, {"path": "khan/science/physics/electricity-magnetism/magnets-magnetic/magnetism-2/", "id": "NnlAI4ZiUrQ", "title": "Magnetic force on a charge", "kind": "Video", "description": "Sal shows how to find the size and direction of the magnetic force using F=qvB and the right hand rule.", "slug": "magnetism-2"}, {"path": "khan/science/physics/electricity-magnetism/magnets-magnetic/cross-product-1/", "id": "zA0fvwtvgvA", "title": "Cross product 1", "kind": "Video", "description": "Introduction to the cross product", "slug": "cross-product-1"}, {"path": "khan/science/physics/electricity-magnetism/magnets-magnetic/cross-product-2/", "id": "o_puKe_lTKk", "title": "Cross product 2", "kind": "Video", "description": "A little more intuition on the cross product.", "slug": "cross-product-2"}, {"path": "khan/science/physics/electricity-magnetism/magnets-magnetic/magnetism-3/", "id": "LTuGQy4rmmo", "title": "Magnetic force on a proton example (part 1)", "kind": "Video", "description": "Sal does an example problem to determine the size and direction of the magnetic force on a proton moving through a magnetic field.", "slug": "magnetism-3"}, {"path": "khan/science/physics/electricity-magnetism/magnets-magnetic/magnetism-4/", "id": "b1QFKLZC11U", "title": "Magnetic force on a proton example (part 2)", "kind": "Video", "description": "Sal determines the radius of the circle traveled by the proton in the previous example by using the formula for centripetal acceleration.", "slug": "magnetism-4"}, {"path": "khan/science/physics/electricity-magnetism/magnets-magnetic/magnetism-5/", "id": "jQ2nD8ZGeEw", "title": "Magnetic force on a current carrying wire", "kind": "Video", "description": "Sal derives the formula F=ILB to determine the force on a current carrying wire.", "slug": "magnetism-5"}], "in_knowledge_map": false, "description": "", "node_slug": "magnets-magnetic", "render_type": "Tutorial", "topic_page_url": "/science/physics/electricity-magnetism/magnets-magnetic", "extended_slug": "science/physics/electricity-magnetism/magnets-magnetic", "kind": "Topic", "slug": "magnets-magnetic"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/electricity-magnetism/magnetic-field-current-carrying-wire/", "id": "magnetic-field-current-carrying-wire", "hide": false, "title": "Magnetic field created by a current", "child_data": [{"kind": "Video", "id": "25723"}, {"kind": "Video", "id": "25725"}, {"kind": "Video", "id": "25727"}, {"kind": "Video", "id": "25735"}], "children": [{"path": "khan/science/physics/electricity-magnetism/magnetic-field-current-carrying-wire/magnetism-6-magnetic-field-due-to-current/", "id": "Ri557hvwhcM", "title": "Magnetic field created by a current carrying wire", "kind": "Video", "description": "See how a wire carrying a current creates a magnetic field.", "slug": "magnetism-6-magnetic-field-due-to-current"}, {"path": "khan/science/physics/electricity-magnetism/magnetic-field-current-carrying-wire/magnetism-7/", "id": "l3hw0twZSCc", "title": "Magnetic force between two currents going in the same direction", "kind": "Video", "description": "Sal shows how to determine the magnetic force between two currents going in the same direction.", "slug": "magnetism-7"}, {"path": "khan/science/physics/electricity-magnetism/magnetic-field-current-carrying-wire/magnetism-8/", "id": "4tctB1wZNiI", "title": "Magnetic force between two currents going in opposite directions", "kind": "Video", "description": "Sal shows how to determine the magnetic force between two currents going in opposite directions.", "slug": "magnetism-8"}, {"path": "khan/science/physics/electricity-magnetism/magnetic-field-current-carrying-wire/magnetism-12-induced-current-in-a-wire/", "id": "KuUMUvwvML8", "title": "Induced current in a wire", "kind": "Video", "description": "Sal determines the current and EMF induced in a wire pulled through a magnetic field.", "slug": "magnetism-12-induced-current-in-a-wire"}], "in_knowledge_map": false, "description": "", "node_slug": "magnetic-field-current-carrying-wire", "render_type": "Tutorial", "topic_page_url": "/science/physics/electricity-magnetism/magnetic-field-current-carrying-wire", "extended_slug": "science/physics/electricity-magnetism/magnetic-field-current-carrying-wire", "kind": "Topic", "slug": "magnetic-field-current-carrying-wire"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/electricity-magnetism/electric-motors/", "id": "electric-motors", "hide": false, "title": "Electric motors", "child_data": [{"kind": "Video", "id": "25729"}, {"kind": "Video", "id": "25731"}, {"kind": "Video", "id": "25733"}, {"kind": "Video", "id": "25737"}, {"kind": "Video", "id": "25739"}, {"kind": "Video", "id": "25741"}], "children": [{"path": "khan/science/physics/electricity-magnetism/electric-motors/magnetism-9-electric-motors/", "id": "pAgPfr7MkkU", "title": "Electric motors (part 1)", "kind": "Video", "description": "Sal shows that there will be a net torque on a loop of current in a wire. Sal shows that this net torque will cause the loop to rotate.", "slug": "magnetism-9-electric-motors"}, {"path": "khan/science/physics/electricity-magnetism/electric-motors/magnetism-10-electric-motors/", "id": "cePkWyXRvIQ", "title": "Electric motors (part 2)", "kind": "Video", "description": "Sal shows that a commutator can be used in order to keep the loop of wire rotating in the magnetic field.", "slug": "magnetism-10-electric-motors"}, {"path": "khan/science/physics/electricity-magnetism/electric-motors/magnetism-11-electric-motors/", "id": "XMkUDyl1ZRo", "title": "Electric motors (part 3)", "kind": "Video", "description": "Sal finishes the explanation of how a commutator will allow a loop of wire to continue spinning in a magnetic field, thereby allowing it to work as an electric motor.", "slug": "magnetism-11-electric-motors"}, {"path": "khan/science/physics/electricity-magnetism/electric-motors/the-dot-product/", "id": "KDHuWxy53uM", "title": "The dot product", "kind": "Video", "description": "Introduction to the vector dot product.", "slug": "the-dot-product"}, {"path": "khan/science/physics/electricity-magnetism/electric-motors/dot-vs-cross-product/", "id": "E34CftP455k", "title": "Dot vs. cross product", "kind": "Video", "description": "Understanding the differences between the dot and cross products", "slug": "dot-vs-cross-product"}, {"path": "khan/science/physics/electricity-magnetism/electric-motors/calculating-dot-and-cross-products-with-unit-vector-notation/", "id": "enr7JqvehJs", "title": "Calculating dot and cross products with unit vector notation", "kind": "Video", "description": "Calculating the dot and cross products when vectors are presented in their x, y, and z (or i,j, and k) components.", "slug": "calculating-dot-and-cross-products-with-unit-vector-notation"}], "in_knowledge_map": false, "description": "", "node_slug": "electric-motors", "render_type": "Tutorial", "topic_page_url": "/science/physics/electricity-magnetism/electric-motors", "extended_slug": "science/physics/electricity-magnetism/electric-motors", "kind": "Topic", "slug": "electric-motors"}], "in_knowledge_map": false, "description": "Electrical circuits are all around us. The computer you're using to read this is full of them! Let's start to study how electrical charges interact.", "node_slug": "electricity-magnetism", "render_type": "Topic", "topic_page_url": "/science/physics/electricity-magnetism", "extended_slug": "science/physics/electricity-magnetism", "kind": "Topic", "slug": "electricity-magnetism"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/circuits-topic/", "id": "circuits-topic", "hide": false, "title": "Circuits", "child_data": [{"kind": "Topic", "id": "xe05ef466"}, {"kind": "Topic", "id": "x935f1ded"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/circuits-topic/circuits-resistance/", "id": "circuits-resistance", "hide": false, "title": "Ohm's law and circuits with resistors", "child_data": [{"kind": "Video", "id": "25699"}, {"kind": "Video", "id": "25701"}, {"kind": "Video", "id": "25703"}, {"kind": "Video", "id": "25705"}, {"kind": "Video", "id": "x2d278559"}, {"kind": "Video", "id": "xa8591b23"}, {"kind": "Video", "id": "x40f10fec"}], "children": [{"path": "khan/science/physics/circuits-topic/circuits-resistance/circuits-part-1/", "id": "3o8_EARoMtg", "title": "Introduction to circuits and Ohm's law", "kind": "Video", "description": "Introduction to electricity, circuits, current and resistance", "slug": "circuits-part-1"}, {"path": "khan/science/physics/circuits-topic/circuits-resistance/circuits-part-2/", "id": "7vHh1sfZ5KE", "title": "Resistors in series", "kind": "Video", "description": "Resistors in series", "slug": "circuits-part-2"}, {"path": "khan/science/physics/circuits-topic/circuits-resistance/circuits-part-3/", "id": "ZrMw7P6P2Gw", "title": "Resistors in parallel", "kind": "Video", "description": "Resistors in parallel", "slug": "circuits-part-3"}, {"path": "khan/science/physics/circuits-topic/circuits-resistance/circuits-part-4/", "id": "3NcIK0s3IwU", "title": "Example: Analyzing a more complex resistor circuit", "kind": "Video", "description": "A hairy resistance problem", "slug": "circuits-part-4"}, {"path": "khan/science/physics/circuits-topic/circuits-resistance/resistivity-and-conductivity/", "id": "4rsswT_Rv1M", "title": "Resistivity and conductivity", "kind": "Video", "slug": "resistivity-and-conductivity"}, {"path": "khan/science/physics/circuits-topic/circuits-resistance/voltmeters-and-ammeters/", "id": "yE3eQ6q39f4", "title": "Voltmeters and Ammeters", "kind": "Video", "slug": "voltmeters-and-ammeters"}, {"path": "khan/science/physics/circuits-topic/circuits-resistance/electrolytic-conductivity/", "id": "uUhBEufepWk", "title": "Electrolytic conductivity", "kind": "Video", "slug": "electrolytic-conductivity"}], "in_knowledge_map": false, "description": "", "node_slug": "circuits-resistance", "render_type": "Tutorial", "topic_page_url": "/science/physics/circuits-topic/circuits-resistance", "extended_slug": "science/physics/circuits-topic/circuits-resistance", "kind": "Topic", "slug": "circuits-resistance"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/circuits-topic/circuits-with-capacitors/", "id": "circuits-with-capacitors", "hide": false, "title": "Circuits with capacitors", "child_data": [{"kind": "Video", "id": "xc64de00d"}, {"kind": "Video", "id": "25697"}, {"kind": "Video", "id": "x28f1d646"}, {"kind": "Video", "id": "x276a1169"}, {"kind": "Video", "id": "x9e833752"}, {"kind": "Video", "id": "xb0101987"}], "children": [{"path": "khan/science/physics/circuits-topic/circuits-with-capacitors/capacitors-and-capacitance/", "id": "u-jigaMJT10", "title": "Capacitors and capacitance", "kind": "Video", "description": "A basic overview of capacitors and capacitance. By David Santo Pietro.", "slug": "capacitors-and-capacitance"}, {"path": "khan/science/physics/circuits-topic/circuits-with-capacitors/capacitance/", "id": "ngOC4eUQl8Y", "title": "Capacitance", "kind": "Video", "description": "Introduction to the capacitance of a two place capacitor.", "slug": "capacitance"}, {"path": "khan/science/physics/circuits-topic/circuits-with-capacitors/energy-capacitor/", "id": "SIU_9SMd5q0", "title": "Energy of a capacitor", "kind": "Video", "description": "This video explains the potential of a capacitor and how they function in a circuit. By David Santo Pietro.", "slug": "energy-capacitor"}, {"path": "khan/science/physics/circuits-topic/circuits-with-capacitors/capacitors-series/", "id": "-MaD9Ycy3a4", "title": "Capacitors in series", "kind": "Video", "description": "The effect on voltage and current when capacitors are constructed in series in a circuit. By David Santo Pietro.", "slug": "capacitors-series"}, {"path": "khan/science/physics/circuits-topic/circuits-with-capacitors/capacitors-parallel/", "id": "P-1mWGeJjmg", "title": "Capacitors in parallel", "kind": "Video", "description": "The effect on voltage and current when capacitors are constructed in parallel in a circuit. By David Santo Pietro.", "slug": "capacitors-parallel"}, {"path": "khan/science/physics/circuits-topic/circuits-with-capacitors/dielectrics-capacitors/", "id": "rkntp3_cZl4", "title": "Dielectrics in capacitors", "kind": "Video", "description": "How dielectrics function in circuits. By David Santo Pietro.", "slug": "dielectrics-capacitors"}], "in_knowledge_map": false, "description": "", "node_slug": "circuits-with-capacitors", "render_type": "Tutorial", "topic_page_url": "/science/physics/circuits-topic/circuits-with-capacitors", "extended_slug": "science/physics/circuits-topic/circuits-with-capacitors", "kind": "Topic", "slug": "circuits-with-capacitors"}], "in_knowledge_map": false, "description": "", "node_slug": "circuits-topic", "render_type": "Topic", "topic_page_url": "/science/physics/circuits-topic", "extended_slug": "science/physics/circuits-topic", "kind": "Topic", "slug": "circuits-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/mechanical-waves-and-sound/", "id": "mechanical-waves-and-sound", "hide": false, "title": "Mechanical waves and sound", "child_data": [{"kind": "Topic", "id": "x63b2a61b"}, {"kind": "Topic", "id": "x1044af3f"}, {"kind": "Topic", "id": "xc17a1206"}, {"kind": "Topic", "id": "xbce5d380"}, {"kind": "Topic", "id": "x222e72c5"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/mechanical-waves-and-sound/mechanical-waves/", "id": "mechanical-waves", "hide": false, "title": "Introduction to mechanical waves", "child_data": [{"kind": "Video", "id": "25743"}, {"kind": "Video", "id": "25745"}], "children": [{"path": "khan/science/physics/mechanical-waves-and-sound/mechanical-waves/introduction-to-waves/", "id": "c38H6UKt3_I", "title": "Introduction to waves", "kind": "Video", "description": "Introduction to transverse and longitudinal waves", "slug": "introduction-to-waves"}, {"path": "khan/science/physics/mechanical-waves-and-sound/mechanical-waves/amplitude-period-frequency-and-wavelength-of-periodic-waves/", "id": "tJW_a6JeXD8", "title": "Amplitude, period, frequency and wavelength of periodic waves", "kind": "Video", "description": "Amplitude, period, frequency and wavelength of periodic waves", "slug": "amplitude-period-frequency-and-wavelength-of-periodic-waves"}], "in_knowledge_map": false, "description": "", "node_slug": "mechanical-waves", "render_type": "Tutorial", "topic_page_url": "/science/physics/mechanical-waves-and-sound/mechanical-waves", "extended_slug": "science/physics/mechanical-waves-and-sound/mechanical-waves", "kind": "Topic", "slug": "mechanical-waves"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/mechanical-waves-and-sound/sound-topic/", "id": "sound-topic", "hide": false, "title": "Sound", "child_data": [{"kind": "Video", "id": "xa4f83089"}, {"kind": "Video", "id": "x3dd64aec"}, {"kind": "Video", "id": "x089b4e4b"}, {"kind": "Video", "id": "x96f7dd45"}, {"kind": "Video", "id": "28124"}, {"kind": "Video", "id": "x86c2a185"}], "children": [{"path": "khan/science/physics/mechanical-waves-and-sound/sound-topic/production-of-sound/", "id": "nGKffdaI4Pg", "title": "Production of sound", "kind": "Video", "slug": "production-of-sound"}, {"path": "khan/science/physics/mechanical-waves-and-sound/sound-topic/sound-properties-amplitude-period-frequency-wavelength/", "id": "-_xZZt99MzY", "title": "Sound Properties (Amplitude, Period, Frequency, Wavelength)", "kind": "Video", "slug": "sound-properties-amplitude-period-frequency-wavelength"}, {"path": "khan/science/physics/mechanical-waves-and-sound/sound-topic/speed-of-sound/", "id": "UgE2GIQwUCw", "title": "Speed of Sound", "kind": "Video", "slug": "speed-of-sound"}, {"path": "khan/science/physics/mechanical-waves-and-sound/sound-topic/relative-speed-of-sound-in-solids-liquids-and-gases/", "id": "yF4cvbAYjwI", "title": "Relative speed of sound in solids, liquids, and gases", "kind": "Video", "slug": "relative-speed-of-sound-in-solids-liquids-and-gases"}, {"path": "khan/science/physics/mechanical-waves-and-sound/sound-topic/mach-numbers/", "id": "VlaGxYjnoPY", "title": "Mach numbers", "kind": "Video", "description": "Mach numbers", "slug": "mach-numbers"}, {"path": "khan/science/physics/mechanical-waves-and-sound/sound-topic/ultrasound-medical-imaging/", "id": "sTcqtljxLOk", "title": "Ultrasound medical imaging", "kind": "Video", "slug": "ultrasound-medical-imaging"}], "in_knowledge_map": false, "description": "", "node_slug": "sound-topic", "render_type": "Tutorial", "topic_page_url": "/science/physics/mechanical-waves-and-sound/sound-topic", "extended_slug": "science/physics/mechanical-waves-and-sound/sound-topic", "kind": "Topic", "slug": "sound-topic"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/mechanical-waves-and-sound/sound-intensity/", "id": "sound-intensity", "hide": false, "title": "Sound intensity", "child_data": [{"kind": "Video", "id": "x9d843e42"}, {"kind": "Video", "id": "xe87dc7c3"}], "children": [{"path": "khan/science/physics/mechanical-waves-and-sound/sound-intensity/decibel-scale/", "id": "_p-WyPg1sbU", "title": "Decibel Scale", "kind": "Video", "slug": "decibel-scale"}, {"path": "khan/science/physics/mechanical-waves-and-sound/sound-intensity/why-do-sounds-get-softer/", "id": "46V8qqVRirk", "title": "Why do sounds get softer?", "kind": "Video", "slug": "why-do-sounds-get-softer"}], "in_knowledge_map": false, "description": "", "node_slug": "sound-intensity", "render_type": "Tutorial", "topic_page_url": "/science/physics/mechanical-waves-and-sound/sound-intensity", "extended_slug": "science/physics/mechanical-waves-and-sound/sound-intensity", "kind": "Topic", "slug": "sound-intensity"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/mechanical-waves-and-sound/standing-waves/", "id": "standing-waves", "hide": false, "title": "Standing waves", "child_data": [{"kind": "Video", "id": "x1cd52325"}, {"kind": "Video", "id": "x255e2941"}], "children": [{"path": "khan/science/physics/mechanical-waves-and-sound/standing-waves/standing-waves-in-tubes-part-1/", "id": "BhQUW9s-R8M", "title": "Standing waves in tubes (part 1)", "kind": "Video", "slug": "standing-waves-in-tubes-part-1"}, {"path": "khan/science/physics/mechanical-waves-and-sound/standing-waves/standing-waves-in-tubes-part-2/", "id": "1S4DtuMY88I", "title": "Standing waves in tubes (part 2)", "kind": "Video", "slug": "standing-waves-in-tubes-part-2"}], "in_knowledge_map": false, "description": "", "node_slug": "standing-waves", "render_type": "Tutorial", "topic_page_url": "/science/physics/mechanical-waves-and-sound/standing-waves", "extended_slug": "science/physics/mechanical-waves-and-sound/standing-waves", "kind": "Topic", "slug": "standing-waves"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/mechanical-waves-and-sound/doppler-effect/", "id": "doppler-effect", "hide": false, "title": "The Doppler effect", "child_data": [{"kind": "Video", "id": "28120"}, {"kind": "Video", "id": "28121"}, {"kind": "Video", "id": "28122"}, {"kind": "Video", "id": "28123"}, {"kind": "Video", "id": "xcadea16e"}, {"kind": "Video", "id": "x9d1cacc7"}], "children": [{"path": "khan/science/physics/mechanical-waves-and-sound/doppler-effect/introduction-to-the-doppler-effect/", "id": "dc7l7Qqa8xk", "title": "Introduction to the doppler effect", "kind": "Video", "description": "Introduction to the Doppler Effect", "slug": "introduction-to-the-doppler-effect"}, {"path": "khan/science/physics/mechanical-waves-and-sound/doppler-effect/doppler-effect-formula-for-observed-frequency/", "id": "kGrk6V8tWDY", "title": "Doppler effect formula for observed frequency", "kind": "Video", "description": "Doppler effect formula for observed frequency", "slug": "doppler-effect-formula-for-observed-frequency"}, {"path": "khan/science/physics/mechanical-waves-and-sound/doppler-effect/doppler-effect-formula-when-source-is-moving-away/", "id": "KkJ0wL9f2VY", "title": "Doppler effect formula when source is moving away", "kind": "Video", "description": "Doppler effect formula when source is moving away", "slug": "doppler-effect-formula-when-source-is-moving-away"}, {"path": "khan/science/physics/mechanical-waves-and-sound/doppler-effect/when-the-source-and-the-wave-move-at-the-same-velocity/", "id": "4Xgk3vusxT8", "title": "When the source and the wave move at the same velocity", "kind": "Video", "description": "When the source and the wave move at the same velocity", "slug": "when-the-source-and-the-wave-move-at-the-same-velocity"}, {"path": "khan/science/physics/mechanical-waves-and-sound/doppler-effect/doppler-effect-for-a-moving-observer/", "id": "2TTu0TvB6N0", "title": "Doppler effect for a moving observer", "kind": "Video", "slug": "doppler-effect-for-a-moving-observer"}, {"path": "khan/science/physics/mechanical-waves-and-sound/doppler-effect/doppler-effect-reflection-off-a-moving-object/", "id": "i4ZiV6NIs98", "title": "Doppler effect: reflection off a moving object", "kind": "Video", "slug": "doppler-effect-reflection-off-a-moving-object"}], "in_knowledge_map": false, "description": "", "node_slug": "doppler-effect", "render_type": "Tutorial", "topic_page_url": "/science/physics/mechanical-waves-and-sound/doppler-effect", "extended_slug": "science/physics/mechanical-waves-and-sound/doppler-effect", "kind": "Topic", "slug": "doppler-effect"}], "in_knowledge_map": false, "description": "", "node_slug": "mechanical-waves-and-sound", "render_type": "Topic", "topic_page_url": "/science/physics/mechanical-waves-and-sound", "extended_slug": "science/physics/mechanical-waves-and-sound", "kind": "Topic", "slug": "mechanical-waves-and-sound"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/geometric-optics/", "id": "geometric-optics", "hide": false, "title": "Geometric optics", "child_data": [{"kind": "Topic", "id": "x113a52df"}, {"kind": "Topic", "id": "xe14cfc75"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/geometric-optics/reflection-refraction/", "id": "reflection-refraction", "hide": false, "title": "Reflection and refraction", "child_data": [{"kind": "Video", "id": "8187516"}, {"kind": "Video", "id": "8187517"}, {"kind": "Video", "id": "8187518"}, {"kind": "Video", "id": "8187519"}, {"kind": "Video", "id": "8187520"}, {"kind": "Video", "id": "8187521"}, {"kind": "Video", "id": "8187522"}, {"kind": "Video", "id": "x8919196d"}], "children": [{"path": "khan/science/physics/geometric-optics/reflection-refraction/specular-and-diffuse-reflection/", "id": "sd0BOnN6aNY", "title": "Specular and diffuse reflection", "kind": "Video", "description": "Specular and Diffuse Reflection", "slug": "specular-and-diffuse-reflection"}, {"path": "khan/science/physics/geometric-optics/reflection-refraction/specular-and-diffuse-reflection-2/", "id": "XR52dXLyz-M", "title": "Specular and diffuse reflection 2", "kind": "Video", "description": "Specular and Diffuse Reflection 2", "slug": "specular-and-diffuse-reflection-2"}, {"path": "khan/science/physics/geometric-optics/reflection-refraction/refraction-and-snell-s-law/", "id": "y55tzg_jW9I", "title": "Refraction and Snell's law", "kind": "Video", "description": "Refraction and Snell's Law", "slug": "refraction-and-snell-s-law"}, {"path": "khan/science/physics/geometric-optics/reflection-refraction/refraction-in-water/", "id": "jxptCXHLxKQ", "title": "Refraction in water", "kind": "Video", "description": "Refraction in Water", "slug": "refraction-in-water"}, {"path": "khan/science/physics/geometric-optics/reflection-refraction/snell-s-law-examples-1/", "id": "HahjsBApxLE", "title": "Snell's law example 1", "kind": "Video", "description": "Snell's Law Example 1", "slug": "snell-s-law-examples-1"}, {"path": "khan/science/physics/geometric-optics/reflection-refraction/snell-s-law-example-2/", "id": "10LuSfZZa3E", "title": "Snell's law example 2", "kind": "Video", "description": "Snell's Law Example 2", "slug": "snell-s-law-example-2"}, {"path": "khan/science/physics/geometric-optics/reflection-refraction/total-internal-reflection/", "id": "WRuatAcd2WY", "title": "Total internal reflection", "kind": "Video", "description": "Critical incident angle and total internal reflection", "slug": "total-internal-reflection"}, {"path": "khan/science/physics/geometric-optics/reflection-refraction/dispersion/", "id": "HRuLhY0NAMI", "title": "Dispersion", "kind": "Video", "slug": "dispersion"}], "in_knowledge_map": false, "description": "", "node_slug": "reflection-refraction", "render_type": "Tutorial", "topic_page_url": "/science/physics/geometric-optics/reflection-refraction", "extended_slug": "science/physics/geometric-optics/reflection-refraction", "kind": "Topic", "slug": "reflection-refraction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/geometric-optics/mirrors-and-lenses/", "id": "mirrors-and-lenses", "hide": false, "title": "Mirrors and lenses", "child_data": [{"kind": "Video", "id": "8187523"}, {"kind": "Video", "id": "8187524"}, {"kind": "Video", "id": "8187525"}, {"kind": "Video", "id": "8187526"}, {"kind": "Video", "id": "8187527"}, {"kind": "Video", "id": "8187528"}, {"kind": "Video", "id": "8187529"}, {"kind": "Video", "id": "8187530"}, {"kind": "Video", "id": "8187531"}, {"kind": "Video", "id": "x39cece9e"}, {"kind": "Video", "id": "x3d81e0e3"}, {"kind": "Video", "id": "xc12d168d"}], "children": [{"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/virtual-image/", "id": "nrOg85VPQgw", "title": "Virtual image", "kind": "Video", "description": "Virtual Image", "slug": "virtual-image"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/parabolic-mirrors-and-real-images/", "id": "8X1AS9qD5AQ", "title": "Parabolic mirrors and real images", "kind": "Video", "description": "Parabolic Mirrors and Real Images", "slug": "parabolic-mirrors-and-real-images"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/parabolic-mirrors-2/", "id": "7m0u6dxA5Xo", "title": "Parabolic mirrors 2", "kind": "Video", "description": "Parabolic Mirrors 2", "slug": "parabolic-mirrors-2"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/convex-parabolic-mirrors/", "id": "dWY25vb1ZB0", "title": "Convex parabolic mirrors", "kind": "Video", "description": "Convex Parabolic Mirrors", "slug": "convex-parabolic-mirrors"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/convex-lenses/", "id": "K0sjZ5nqQ7g", "title": "Convex lenses", "kind": "Video", "description": "Convex Lenses", "slug": "convex-lenses"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/convex-lens-examples/", "id": "xxF_mdoZom0", "title": "Convex lens examples", "kind": "Video", "description": "Convex Lens Examples", "slug": "convex-lens-examples"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/concave-lenses/", "id": "Vh70PyitQzo", "title": "Concave lenses", "kind": "Video", "description": "Concave Lenses", "slug": "concave-lenses"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/object-image-and-focal-distance-relationship-proof-of-formula/", "id": "rse0I7rZ8jM", "title": "Object image and focal distance relationship (proof of formula)", "kind": "Video", "description": "Object Image and Focal Distance Relationship (Proof of Formula)", "slug": "object-image-and-focal-distance-relationship-proof-of-formula"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/object-image-height-and-distance-relationship/", "id": "acQYX4nwhCk", "title": "Object image height and distance relationship", "kind": "Video", "description": "Object Image Height and Distance Relationship", "slug": "object-image-height-and-distance-relationship"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/thin-lens-equation-and-problem-solving/", "id": "7GV1UZSTNJg", "title": "Thin lens equation and problem solving", "kind": "Video", "slug": "thin-lens-equation-and-problem-solving"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/multiple-lens-systems/", "id": "GPomGcZ3_kk", "title": "Multiple lens systems", "kind": "Video", "slug": "multiple-lens-systems"}, {"path": "khan/science/physics/geometric-optics/mirrors-and-lenses/diopters-aberration-and-the-human-eye/", "id": "eji8zKa7H7s", "title": "Diopters, Aberration, and the Human Eye", "kind": "Video", "slug": "diopters-aberration-and-the-human-eye"}], "in_knowledge_map": false, "description": "", "node_slug": "mirrors-and-lenses", "render_type": "Tutorial", "topic_page_url": "/science/physics/geometric-optics/mirrors-and-lenses", "extended_slug": "science/physics/geometric-optics/mirrors-and-lenses", "kind": "Topic", "slug": "mirrors-and-lenses"}], "in_knowledge_map": false, "description": "", "node_slug": "geometric-optics", "render_type": "Topic", "topic_page_url": "/science/physics/geometric-optics", "extended_slug": "science/physics/geometric-optics", "kind": "Topic", "slug": "geometric-optics"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/light-waves/", "id": "light-waves", "hide": false, "title": "Light waves", "child_data": [{"kind": "Topic", "id": "x224fe8b0"}, {"kind": "Topic", "id": "xacd74046"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/light-waves/introduction-to-light-waves/", "id": "introduction-to-light-waves", "hide": false, "title": "Introduction to light waves", "child_data": [{"kind": "Video", "id": "x93657b33"}, {"kind": "Video", "id": "x38701d13"}], "children": [{"path": "khan/science/physics/light-waves/introduction-to-light-waves/electromagnetic-waves-and-the-electromagnetic-spectrum/", "id": "7eutept5h0Q", "title": "Electromagnetic waves and the electromagnetic spectrum", "kind": "Video", "slug": "electromagnetic-waves-and-the-electromagnetic-spectrum"}, {"path": "khan/science/physics/light-waves/introduction-to-light-waves/polarization-of-light-linear-and-circular/", "id": "HH58VmUbOKM", "title": "Polarization of light, linear and circular", "kind": "Video", "slug": "polarization-of-light-linear-and-circular"}], "in_knowledge_map": false, "description": "", "node_slug": "introduction-to-light-waves", "render_type": "Tutorial", "topic_page_url": "/science/physics/light-waves/introduction-to-light-waves", "extended_slug": "science/physics/light-waves/introduction-to-light-waves", "kind": "Topic", "slug": "introduction-to-light-waves"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/light-waves/interference-of-light-waves/", "id": "interference-of-light-waves", "hide": false, "title": "Interference of light waves", "child_data": [{"kind": "Video", "id": "x8a6b85c9"}, {"kind": "Video", "id": "x7aa60791"}, {"kind": "Video", "id": "xd2a6554e"}, {"kind": "Video", "id": "xb810086a"}, {"kind": "Video", "id": "x917c7a7b"}, {"kind": "Video", "id": "xdc1d3db2"}, {"kind": "Video", "id": "x1a496461"}, {"kind": "Video", "id": "x1408ebe1"}, {"kind": "Video", "id": "x6ddace9a"}], "children": [{"path": "khan/science/physics/light-waves/interference-of-light-waves/wave-interference/", "id": "blur0MemUQA", "title": "Wave Interference", "kind": "Video", "slug": "wave-interference"}, {"path": "khan/science/physics/light-waves/interference-of-light-waves/youngs-double-split-part-1/", "id": "Pk6s2OlKzKQ", "title": "Young's Double slit part 1", "kind": "Video", "slug": "youngs-double-split-part-1"}, {"path": "khan/science/physics/light-waves/interference-of-light-waves/youngs-double-slit-part-2/", "id": "1abpdO27KTo", "title": "Young's Double slit part 2", "kind": "Video", "slug": "youngs-double-slit-part-2"}, {"path": "khan/science/physics/light-waves/interference-of-light-waves/youngs-double-slit-problem-solving/", "id": "5-2RZsU8e3U", "title": "Young's Double Slit problem solving", "kind": "Video", "slug": "youngs-double-slit-problem-solving"}, {"path": "khan/science/physics/light-waves/interference-of-light-waves/diffraction-grating/", "id": "F6dZjuw1KUo", "title": "Diffraction grating", "kind": "Video", "slug": "diffraction-grating"}, {"path": "khan/science/physics/light-waves/interference-of-light-waves/single-slit-interference/", "id": "7CmbItRjM-Y", "title": "Single Slit Interference", "kind": "Video", "slug": "single-slit-interference"}, {"path": "khan/science/physics/light-waves/interference-of-light-waves/more-on-single-slit-interference/", "id": "T-kgoxhFSmU", "title": "More on Single Slit Interference", "kind": "Video", "slug": "more-on-single-slit-interference"}, {"path": "khan/science/physics/light-waves/interference-of-light-waves/thin-film-interference-part-1/", "id": "oXowkdgJPO4", "title": "Thin Film Interference part 1", "kind": "Video", "slug": "thin-film-interference-part-1"}, {"path": "khan/science/physics/light-waves/interference-of-light-waves/thin-film-interference-part-2/", "id": "yWkga94iBzU", "title": "Thin Film Interference part 2", "kind": "Video", "slug": "thin-film-interference-part-2"}], "in_knowledge_map": false, "description": "", "node_slug": "interference-of-light-waves", "render_type": "Tutorial", "topic_page_url": "/science/physics/light-waves/interference-of-light-waves", "extended_slug": "science/physics/light-waves/interference-of-light-waves", "kind": "Topic", "slug": "interference-of-light-waves"}], "in_knowledge_map": false, "description": "", "node_slug": "light-waves", "render_type": "Topic", "topic_page_url": "/science/physics/light-waves", "extended_slug": "science/physics/light-waves", "kind": "Topic", "slug": "light-waves"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/physics/ask-a-physicist/", "id": "ask-a-physicist", "hide": false, "title": "Ask a Physicist! (archived)", "child_data": [{"kind": "Topic", "id": "x5c1d3816"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/physics/ask-a-physicist/ask-a-physicist-tutorial/", "id": "ask-a-physicist-tutorial", "hide": false, "title": "Ask a Physicist! (archived)", "child_data": [{"kind": "Video", "id": "x92b4b2c7"}], "children": [{"path": "khan/science/physics/ask-a-physicist/ask-a-physicist-tutorial/ama-physics-khan-video/", "id": "6ElH8dKuAsY", "title": "Ask me anything (archived)", "kind": "Video", "description": "Unfortunately this ask me anything session is now over. Thanks to everyone for participating, whether you asked questions or answered them. There were a ton of amazing and interesting questions. Also, many that I want to think more about. You do the same and hopefully we can have another one of these in the future. Well done everyone!\n\nHi everyone, I'm David and I love physics. Have a physics question/comment? I'll be checking the comments section every couple hours until Sunday August 2nd at 12:00 PM PST and replying as often as possible.\u00a0Also, please feel free to answer other people's questions if you know the answer.", "slug": "ama-physics-khan-video"}], "in_knowledge_map": false, "description": "Hi everyone, I'm David and I love physics. Have a physics question/comment? I'll be checking the comments section every couple hours until Sunday August 2nd at 12:00 PM PST and replying as often as possible. \n\nAlso, please feel free to answer other people's questions if you know the answer.", "node_slug": "ask-a-physicist-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/physics/ask-a-physicist/ask-a-physicist-tutorial", "extended_slug": "science/physics/ask-a-physicist/ask-a-physicist-tutorial", "kind": "Topic", "slug": "ask-a-physicist-tutorial"}], "in_knowledge_map": false, "description": "Hi everyone, I'm David, and I love physics. Have a physics question/comment? Ask me anything. I'll be checking the comments section every couple hours until Sunday August 2nd at 12:00 PM PST and replying as often as possible. \n\nAlso, please feel free to answer other people's questions if you know the answer.", "node_slug": "ask-a-physicist", "render_type": "Topic", "topic_page_url": "/science/physics/ask-a-physicist", "extended_slug": "science/physics/ask-a-physicist", "kind": "Topic", "slug": "ask-a-physicist"}], "in_knowledge_map": false, "description": "Learn about the basic principles that govern the physical world around us. Solid understanding of algebra and a basic understanding of trigonometry necessary.", "node_slug": "physics", "render_type": "Subject", "topic_page_url": "/science/physics", "extended_slug": "science/physics", "kind": "Topic", "slug": "physics"}, {"icon_src": "/images/power-mode/badges/chemistry-40x40.png", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/chemistry/", "id": "chemistry", "hide": false, "title": "Chemistry", "child_data": [{"kind": "Topic", "id": "x8f7c17d6"}, {"kind": "Topic", "id": "x6a3dc8bb"}, {"kind": "Topic", "id": "x56c1bf8b"}, {"kind": "Topic", "id": "xf8f83f04"}, {"kind": "Topic", "id": "xb9f08207"}, {"kind": "Topic", "id": "x1733c331"}, {"kind": "Topic", "id": "xc0edb053"}, {"kind": "Topic", "id": "x2992119b"}, {"kind": "Topic", "id": "x9185c116"}, {"kind": "Topic", "id": "xde176b3a"}, {"kind": "Topic", "id": "x3e6dac86"}, {"kind": "Topic", "id": "x7013457b"}, {"kind": "Topic", "id": "xda541d1f"}, {"kind": "Topic", "id": "x176cca88"}, {"kind": "Topic", "id": "x0f84d799"}, {"kind": "Topic", "id": "x2993c387"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/chemistry/atomic-structure-and-properties/", "id": "atomic-structure-and-properties", "hide": false, "title": "Atoms, molecules, and ions", "child_data": [{"kind": "Topic", "id": "x4d460122"}, {"kind": "Topic", "id": "x7e37e2ee"}, {"kind": "Topic", "id": "x094a68a9"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/science/chemistry/atomic-structure-and-properties/skill-check-for-atoms-molecules-and-ions/", "id": "skill-check-for-atoms-molecules-and-ions", "hide": false, "title": "Skill check for atoms, molecules, and ions", "child_data": [{"kind": "Exercise", "id": "x22efc2ae"}], "children": [{"path": "khan/science/chemistry/atomic-structure-and-properties/skill-check-for-atoms-molecules-and-ions/atomic-structure-skill-check/", "id": "atomic-structure-skill-check", "title": "Skill check: Atoms and molecules", "description": "A skill check for atomic structure, isotopes, and moles", "slug": "atomic-structure-skill-check", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Want to check your knowledge of atoms and molecules for the new school year? Try a skill check for some quick review and links to related videos!", "node_slug": "skill-check-for-atoms-molecules-and-ions", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/atomic-structure-and-properties/skill-check-for-atoms-molecules-and-ions", "extended_slug": "science/chemistry/atomic-structure-and-properties/skill-check-for-atoms-molecules-and-ions", "kind": "Topic", "slug": "skill-check-for-atoms-molecules-and-ions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/", "id": "introduction-to-the-atom", "hide": false, "title": "Introduction to the atom", "child_data": [{"kind": "Video", "id": "183171788"}, {"kind": "Video", "id": "x3e2d8899"}, {"kind": "Video", "id": "xdb36bd49"}, {"kind": "Video", "id": "x389dbbdb"}, {"kind": "Video", "id": "364061"}], "children": [{"path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/elements-and-atoms/", "id": "IFKnq9QM6_A", "title": "Elements and atoms", "kind": "Video", "description": "How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom.", "slug": "elements-and-atoms"}, {"path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/atomic-number-mass-number-and-isotopes/", "id": "I-Or4bUAIfo", "title": "Atomic number, mass number, and isotopes", "kind": "Video", "description": "How to use the atomic number and the mass number to represent different isotopes", "slug": "atomic-number-mass-number-and-isotopes"}, {"path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/atomic-weight-and-atomic-mass/", "id": "NG-rrorZcM8", "title": "Atomic weight and atomic mass", "kind": "Video", "description": "The difference between atomic weight and atomic mass in chemistry, and how it compares to the physics definitions of weight and mass.", "slug": "atomic-weight-and-atomic-mass"}, {"path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/atomic-mass/", "id": "l5n6zIn4NzI", "title": "Atomic weight", "kind": "Video", "description": "An example of calculating atomic weight using the atomic masses of the isotopes.", "slug": "atomic-mass"}, {"path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/the-mole-and-avogadro-s-number/", "id": "AsqEkF7hcII", "title": "The mole and Avogadro's number", "kind": "Video", "description": "Introduction to the idea of a mole as a number (vs. an animal).", "slug": "the-mole-and-avogadro-s-number"}], "in_knowledge_map": false, "description": "In chemistry, we will often be thinking about the world on a much smaller scale than you can see with the naked eye. Here we will learn about atoms and elements, tiny particles that make up the world around us. What are atoms, and what kind of properties do they have? How do we weigh and count atoms? We will answer those questions in this section!", "node_slug": "introduction-to-the-atom", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom", "extended_slug": "science/chemistry/atomic-structure-and-properties/introduction-to-the-atom", "kind": "Topic", "slug": "introduction-to-the-atom"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-compounds/", "id": "introduction-to-compounds", "hide": false, "title": "Introduction to compounds", "child_data": [{"kind": "Article", "id": "x3a8119f9"}, {"kind": "Video", "id": "xc17276be"}, {"kind": "Video", "id": "x84ad601e"}], "children": [{"path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-compounds/empirical-molecular-and-structural-formulas/", "id": "bmjg7lq4m4o", "title": "Empirical, molecular, and structural formulas", "kind": "Video", "description": "Examples to demonstrate the difference between empirical, structural, and molecular formulas.", "slug": "empirical-molecular-and-structural-formulas"}, {"path": "khan/science/chemistry/atomic-structure-and-properties/introduction-to-compounds/molecular-mass-and-molecular-weight/", "id": "_WXndBGQnyI", "title": "Molecular mass and molecular weight", "kind": "Video", "description": "Calculating the molecular mass and molecular weight of water.", "slug": "molecular-mass-and-molecular-weight"}], "in_knowledge_map": false, "description": "There are 118 elements on the periodic table, and often you will see them combine in specific ratios to form compounds. In this tutorial we will learn about the different ways that chemists represent, count, and categorize compounds.", "node_slug": "introduction-to-compounds", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/atomic-structure-and-properties/introduction-to-compounds", "extended_slug": "science/chemistry/atomic-structure-and-properties/introduction-to-compounds", "kind": "Topic", "slug": "introduction-to-compounds"}], "in_knowledge_map": false, "description": "Chemistry is the study of matter, and all matter is made up of atoms. We will learn about elements, atomic number and mass, isotopes, moles (chemistry moles, not the animal), and compounds.", "node_slug": "atomic-structure-and-properties", "render_type": "Topic", "topic_page_url": "/science/chemistry/atomic-structure-and-properties", "extended_slug": "science/chemistry/atomic-structure-and-properties", "kind": "Topic", "slug": "atomic-structure-and-properties"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/chemistry/chemical-reactions-stoichiome/", "id": "chemical-reactions-stoichiome", "hide": false, "title": "Chemical reactions and stoichiometry", "child_data": [{"kind": "Topic", "id": "xf44f4898"}, {"kind": "Topic", "id": "x3ce93b98"}, {"kind": "Topic", "id": "x2857f979"}, {"kind": "Topic", "id": "xcaa2a5b4"}, {"kind": "Topic", "id": "x0018895b"}, {"kind": "Topic", "id": "xb0f24fe5"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/science/chemistry/chemical-reactions-stoichiome/skill-check-for-chemical-reactions-and-stoichiometry/", "id": "skill-check-for-chemical-reactions-and-stoichiometry", "hide": false, "title": "Skill check for chemical reactions and stoichiometry", "child_data": [{"kind": "Exercise", "id": "x6d92c7a2"}], "children": [{"path": "khan/science/chemistry/chemical-reactions-stoichiome/skill-check-for-chemical-reactions-and-stoichiometry/stoichiometry-skill-check/", "id": "stoichiometry-skill-check", "title": "Skill check: Stoichiometry", "description": "A skill check for stoichiometry, limiting reagents, and balancing equations", "slug": "stoichiometry-skill-check", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Want to check your knowledge of chemical reactions and stoichiometry for the new school year? Try a skill check for some quick review and links to related videos!", "node_slug": "skill-check-for-chemical-reactions-and-stoichiometry", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-reactions-stoichiome/skill-check-for-chemical-reactions-and-stoichiometry", "extended_slug": "science/chemistry/chemical-reactions-stoichiome/skill-check-for-chemical-reactions-and-stoichiometry", "kind": "Topic", "slug": "skill-check-for-chemical-reactions-and-stoichiometry"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/", "id": "balancing-chemical-equations", "hide": false, "title": "Balancing chemical equations", "child_data": [{"kind": "Video", "id": "xaf8adcff"}, {"kind": "Video", "id": "xc8ecefc8"}, {"kind": "Video", "id": "x068874ad"}, {"kind": "Video", "id": "x58fe4869"}, {"kind": "Video", "id": "xf98cead0"}, {"kind": "Video", "id": "xf8a51a8a"}, {"kind": "Scratchpad", "id": "1406253871"}, {"kind": "Exercise", "id": "1280176961"}, {"kind": "Article", "id": "x25b36ed0"}], "children": [{"path": "khan/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/chemical-reactions-introduction/", "id": "TStjgUmL1RQ", "title": "Chemical reactions introduction", "kind": "Video", "description": "Reactants and products in reversible and irreversible chemical reactions.", "slug": "chemical-reactions-introduction"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/balancing-chemical-equations-introduction/", "id": "TUuABq95BBM", "title": "Balancing chemical equations", "kind": "Video", "description": "How to balance a chemical reaction by making sure you have the same number of atoms of each element on both sides.", "slug": "balancing-chemical-equations-introduction"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/balancing-more-complex-chemical-equation/", "id": "xqpYeiefZl8", "title": "Balancing more complex chemical equations", "kind": "Video", "description": "Example of balancing the combustion reaction of ethylene. Some tips on how to balance more complicated reactions.", "slug": "balancing-more-complex-chemical-equation"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/visually-understanding-balancing-chemical-equations/", "id": "HbIdp5DURJA", "title": "Visually understanding balancing chemical equations", "kind": "Video", "description": "Relating the balanced chemical equation to the structural formulas of the reactants and product.s.", "slug": "visually-understanding-balancing-chemical-equations"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/balancing-another-combustion-reaction/", "id": "cmi8EnJQA84", "title": "Balancing another combustion reaction", "kind": "Video", "description": "Balancing the combustion reaction of ethane.", "slug": "balancing-another-combustion-reaction"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/balancing-chemical-equation-with-substitution/", "id": "8KXWJCmshEE", "title": "Balancing chemical equation with substitution", "kind": "Video", "description": "Using the substitution method to balance a reaction where a reactant and product have a polyatomic ion in common.", "slug": "balancing-chemical-equation-with-substitution"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/balancing_chemical_equations/", "id": "balancing_chemical_equations", "title": "Balancing chemical equations 1", "description": "Practice balancing chemical equations", "slug": "balancing_chemical_equations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We are now going to look at chemical reactions. But as we do, we need to make sure that atoms aren't magically appearing or disappearing. Put another way, we need to sure that we have the same number of each constituent atom in the product of the reaction as we do in the reactants (the molecules that react)!", "node_slug": "balancing-chemical-equations", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations", "extended_slug": "science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations", "kind": "Topic", "slug": "balancing-chemical-equations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/", "id": "stoichiometry-ideal", "hide": false, "title": "Stoichiometry", "child_data": [{"kind": "Article", "id": "x76f68f1b"}, {"kind": "Video", "id": "379047"}, {"kind": "Video", "id": "24648"}, {"kind": "Video", "id": "24650"}, {"kind": "Exercise", "id": "1280262369"}], "children": [{"path": "khan/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/stoichiometry/", "id": "SjQG3rKSZUQ", "title": "Stoichiometry", "kind": "Video", "description": "Introduction to stoichiometry. Using the balanced reaction to find molar ratios.", "slug": "stoichiometry"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/stoichiometry-example-problem-1/", "id": "jFv6k2OV7IU", "title": "Stoichiometry example problem 1", "kind": "Video", "description": "Figuring out grams of reactants and product produced from reaction of phosphorous and chlorine.", "slug": "stoichiometry-example-problem-1"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/stoichiometry-example-problem-2/", "id": "eQf_EAYGo-k", "title": "Stoichiometry example problem 2", "kind": "Video", "description": "Calculating mass of oxygen needed and grams of product formed from the combustion of 25.0 g of glucose.", "slug": "stoichiometry-example-problem-2"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/ideal_stoichiometry/", "id": "ideal_stoichiometry", "title": "Ideal stoichiometry", "description": "Determine the amount (in moles) of a product from a given amount of one reactant.", "slug": "ideal_stoichiometry", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Now we are going to draw the connections between balancing equations and what happens in the lab (where you actually have a certain mass of a compound).", "node_slug": "stoichiometry-ideal", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal", "extended_slug": "science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal", "kind": "Topic", "slug": "stoichiometry-ideal"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry/", "id": "limiting-reagent-stoichiometry", "hide": false, "title": "Limiting reagent stoichiometry", "child_data": [{"kind": "Video", "id": "389052"}, {"kind": "Video", "id": "24652"}, {"kind": "Exercise", "id": "1280388060"}, {"kind": "Article", "id": "xea779847"}], "children": [{"path": "khan/science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry/stoichiometry-limiting-reagent/", "id": "rESzyhPOJ7I", "title": "Stoichiometry: Limiting reagent", "kind": "Video", "description": "Stoichiometry problem where we have a limiting reagent!", "slug": "stoichiometry-limiting-reagent"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry/limiting-reactant-example-problem-1/", "id": "YNriRslOk9A", "title": "Limiting reactant example problem 1", "kind": "Video", "description": "Limiting Reactant Example Problem 1", "slug": "limiting-reactant-example-problem-1"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry/limiting_reagent_stoichiometry/", "id": "limiting_reagent_stoichiometry", "title": "Limiting reagent stoichiometry", "description": "Determine the amount (in grams) of a product from given amounts of two reactants, one of which is limiting.", "slug": "limiting_reagent_stoichiometry", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In a reaction, you often have extra of one molecule (or too little of the other) so all the reactant doesn't react. We'll explore how to identify which reactant is limiting which is helpful in a whole series of scenarios.", "node_slug": "limiting-reagent-stoichiometry", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry", "extended_slug": "science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry", "kind": "Topic", "slug": "limiting-reagent-stoichiometry"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula/", "id": "empirical-molecular-formula", "hide": false, "title": "Molecular composition", "child_data": [{"kind": "Video", "id": "xc17276be"}, {"kind": "Video", "id": "xeba943ec"}, {"kind": "Video", "id": "xe8c122ba"}, {"kind": "Video", "id": "xd574b1c7"}, {"kind": "Video", "id": "378044"}], "children": [{"path": "khan/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula/empirical-molecular-and-structural-formulas/", "id": "bmjg7lq4m4o", "title": "Empirical, molecular, and structural formulas", "kind": "Video", "description": "Examples to demonstrate the difference between empirical, structural, and molecular formulas.", "slug": "empirical-molecular-and-structural-formulas"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula/molecular-mass-percentage/", "id": "4Y2cY5YGxI4", "title": "Molecular mass percentage", "kind": "Video", "description": "Calculating the mass percentages of the elements C, H, and O in glucose after calculating the molecular mass of glucose.", "slug": "molecular-mass-percentage"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula/molecular-weight-percentages/", "id": "UPoXG1Z3sI8", "title": "Molecular weight percentages", "kind": "Video", "description": "Calculating the mass percentages of the elements in benzene after calculating the molecular weight of benzene.", "slug": "molecular-weight-percentages"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula/formula-mass-composition/", "id": "NM0WycKCCDU", "title": "Empirical formula from mass composition", "kind": "Video", "description": "Calculating the empirical formula from the mass percent composition.", "slug": "formula-mass-composition"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula/another-mass-composition-problem/", "id": "sXOIIEZh6qg", "title": "Another mass composition problem", "kind": "Video", "description": "Another exercise converting a mass composition to an empirical formula.", "slug": "another-mass-composition-problem"}], "in_knowledge_map": false, "description": "We'll now explore two different ways of representing what elements are in a molecule: molecular and empirical formulas. Then we'll actually Molecular formulas actually represent the number of atoms in a molecule while empirical formulas show us the ratio of the constituents based on experiments. In order to help us connect these ideas, we'll also explore a quantity called the \"mole\". Just as a \"dozen\" represents 12 of something, a \"mole\" represents roughly 602,200,000,000,000,000,000,000 of something. This will help us think about mass composition of molecules.", "node_slug": "empirical-molecular-formula", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula", "extended_slug": "science/chemistry/chemical-reactions-stoichiome/empirical-molecular-formula", "kind": "Topic", "slug": "empirical-molecular-formula"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chemical-reactions-stoichiome/types-of-chemical-reactions/", "id": "types-of-chemical-reactions", "hide": false, "title": "Types of chemical reactions", "child_data": [{"kind": "Video", "id": "x607996cf"}, {"kind": "Article", "id": "x0454c293"}, {"kind": "Article", "id": "xcdcee868"}, {"kind": "Video", "id": "xf784347d"}, {"kind": "Article", "id": "x0fdddf41"}], "children": [{"path": "khan/science/chemistry/chemical-reactions-stoichiome/types-of-chemical-reactions/oxidation-reduction-or-redox-reactions/", "id": "OE0MMIyMTNU", "title": "Introduction to redox reactions", "kind": "Video", "description": "Finding the half reactions in a combustion reaction, and identifying what is getting oxidized and reduced.", "slug": "oxidation-reduction-or-redox-reactions"}, {"path": "khan/science/chemistry/chemical-reactions-stoichiome/types-of-chemical-reactions/dissolution-and-precipitation/", "id": "g_snytB7iQ0", "title": "Dissolution and precipitation", "kind": "Video", "description": "Defining solute, solvent, hydration, dissolution, precipitation, net ionic equation, and spectator ions. Looking at the molecular level interactions between water and ions in NaCl.", "slug": "dissolution-and-precipitation"}], "in_knowledge_map": false, "description": "", "node_slug": "types-of-chemical-reactions", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-reactions-stoichiome/types-of-chemical-reactions", "extended_slug": "science/chemistry/chemical-reactions-stoichiome/types-of-chemical-reactions", "kind": "Topic", "slug": "types-of-chemical-reactions"}], "in_knowledge_map": false, "description": "We are now going to delve into the heart of chemistry. We learn ways of representing molecules and how molecules react. To do this, we'll even think about \"how many\" of a molecule we have using a quantity called a \"mole\".", "node_slug": "chemical-reactions-stoichiome", "render_type": "Topic", "topic_page_url": "/science/chemistry/chemical-reactions-stoichiome", "extended_slug": "science/chemistry/chemical-reactions-stoichiome", "kind": "Topic", "slug": "chemical-reactions-stoichiome"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/electronic-structure-of-atoms/", "id": "electronic-structure-of-atoms", "hide": false, "title": "Electronic structure of atoms", "child_data": [{"kind": "Topic", "id": "x5bd383e5"}, {"kind": "Topic", "id": "x5247460c"}, {"kind": "Topic", "id": "x54eba031"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen/", "id": "bohr-model-hydrogen", "hide": false, "title": "Bohr's model of the hydrogen atom", "child_data": [{"kind": "Video", "id": "148049940"}, {"kind": "Video", "id": "xc8910b5d"}, {"kind": "Video", "id": "xf312fc13"}, {"kind": "Video", "id": "x209bd4dc"}, {"kind": "Video", "id": "xdb4337d3"}, {"kind": "Video", "id": "xb74206bb"}, {"kind": "Video", "id": "xd763131b"}, {"kind": "Video", "id": "x6ab04571"}], "children": [{"path": "khan/science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen/introduction-to-light/", "id": "rLNM8zI4Q_M", "title": "Introduction to light", "kind": "Video", "description": "Light and electromagnetic radiation", "slug": "introduction-to-light"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen/photoelectric-effect/", "id": "vuGpUFjLaYE", "title": "Photoelectric effect", "kind": "Video", "slug": "photoelectric-effect"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen/bohr-model-radii-derivation-using-physics/", "id": "Qcd0IhW_85I", "title": "Bohr model radii (derivation using physics)", "kind": "Video", "slug": "bohr-model-radii-derivation-using-physics"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen/bohr-model-radii/", "id": "Hbuh5m3p0x0", "title": "Bohr model radii", "kind": "Video", "slug": "bohr-model-radii"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen/bohr-model-energy-levels-derivation-using-physics/", "id": "7Zin8hG9Nhw", "title": "Bohr model energy levels (derivation using physics)", "kind": "Video", "slug": "bohr-model-energy-levels-derivation-using-physics"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen/bohr-model-energy-levels/", "id": "nJ-PtF14EFw", "title": "Bohr model energy levels", "kind": "Video", "slug": "bohr-model-energy-levels"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen/absorption-and-emission/", "id": "AznXSVx2xX0", "title": "Absorption and emission", "kind": "Video", "slug": "absorption-and-emission"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen/emission-spectrum-of-hydrogen/", "id": "Kv-hRvEOjuA", "title": "Emission spectrum of hydrogen", "kind": "Video", "slug": "emission-spectrum-of-hydrogen"}], "in_knowledge_map": false, "description": "Atomic theory is not Bohr-ing! While it doesn't work for atoms with more than one electron, the Bohr model successfully predicts the emission spectrum of hydrogen.", "node_slug": "bohr-model-hydrogen", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen", "extended_slug": "science/chemistry/electronic-structure-of-atoms/bohr-model-hydrogen", "kind": "Topic", "slug": "bohr-model-hydrogen"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/electronic-structure-of-atoms/orbitals-and-electrons/", "id": "orbitals-and-electrons", "hide": false, "title": "Quantum numbers and orbitals", "child_data": [{"kind": "Video", "id": "x5a9c24f5"}, {"kind": "Video", "id": "x7448f8b7"}, {"kind": "Video", "id": "xfe7eabb6"}], "children": [{"path": "khan/science/chemistry/electronic-structure-of-atoms/orbitals-and-electrons/heisenberg-uncertainty-principle/", "id": "PZIoFD_Z73M", "title": "Heisenberg uncertainty principle", "kind": "Video", "slug": "heisenberg-uncertainty-principle"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/orbitals-and-electrons/quantum-numbers/", "id": "KrXE_SzRoqw", "title": "Quantum numbers", "kind": "Video", "slug": "quantum-numbers"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/orbitals-and-electrons/quantum-numbers-for-the-first-four-shells/", "id": "qLU0X154wlE", "title": "Quantum numbers for the first four shells", "kind": "Video", "slug": "quantum-numbers-for-the-first-four-shells"}], "in_knowledge_map": false, "description": "In this tutorial, we will see how the quantum numbers predict the orbitals available in different energy levels.", "node_slug": "orbitals-and-electrons", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/electronic-structure-of-atoms/orbitals-and-electrons", "extended_slug": "science/chemistry/electronic-structure-of-atoms/orbitals-and-electrons", "kind": "Topic", "slug": "orbitals-and-electrons"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/", "id": "electron-configurations-jay-sal", "hide": false, "title": "Electron configurations", "child_data": [{"kind": "Video", "id": "425003"}, {"kind": "Video", "id": "364060"}, {"kind": "Video", "id": "x6f7862d5"}, {"kind": "Video", "id": "355057"}, {"kind": "Video", "id": "xa2187644"}, {"kind": "Video", "id": "xf39357d2"}, {"kind": "Video", "id": "x50988bfb"}, {"kind": "Video", "id": "xf22e57ff"}, {"kind": "Video", "id": "x4d6604e9"}, {"kind": "Video", "id": "xb73055ce"}], "children": [{"path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/orbitals/", "id": "yBrp8uvNAhI", "title": "Orbitals", "kind": "Video", "description": "An introduction to orbitals", "slug": "orbitals"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/more-on-orbitals-and-electron-configuration/", "id": "FmQoSenbtnU", "title": "More on orbitals and electron configuration", "kind": "Video", "description": "More intuition on orbitals. Touching on electron configuration.", "slug": "more-on-orbitals-and-electron-configuration"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/electron-configuration-d-block/", "id": "qkLzAXUP_K0", "title": "Electron configuration for d block element", "kind": "Video", "slug": "electron-configuration-d-block"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/electron-configurations-2/", "id": "YURReI6OJsg", "title": "Electron configurations 2", "kind": "Video", "description": "Figuring out configurations for the d-block elements", "slug": "electron-configurations-2"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/electron-configuration-f-block/", "id": "L-0FkEPPdXE", "title": "Electron configuration for f block element Nd", "kind": "Video", "slug": "electron-configuration-f-block"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/electron-configurations-for-the-first-period/", "id": "0MKsFD03Ukc", "title": "Electron configurations for the first period", "kind": "Video", "slug": "electron-configurations-for-the-first-period"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/electron-configurations-for-the-second-period/", "id": "UEPs-GA2s40", "title": "Electron configurations for the second period", "kind": "Video", "slug": "electron-configurations-for-the-second-period"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/electron-configurations-for-the-third-and-fourth-periods/", "id": "3tyrkxruz88", "title": "Electron configurations for the third and fourth periods", "kind": "Video", "slug": "electron-configurations-for-the-third-and-fourth-periods"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/electron-configurations-in-the-3d-orbitals/", "id": "ddNsfv8iaps", "title": "Electron configurations in the 3d orbitals", "kind": "Video", "slug": "electron-configurations-in-the-3d-orbitals"}, {"path": "khan/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal/paramagnetism-and-diamagnetism/", "id": "-lIc5z3XjXQ", "title": "Paramagnetism and diamagnetism", "kind": "Video", "slug": "paramagnetism-and-diamagnetism"}], "in_knowledge_map": false, "description": "In this tutorial, Sal and Jay show how to write electron configurations.", "node_slug": "electron-configurations-jay-sal", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal", "extended_slug": "science/chemistry/electronic-structure-of-atoms/electron-configurations-jay-sal", "kind": "Topic", "slug": "electron-configurations-jay-sal"}], "in_knowledge_map": false, "description": "So we know that all matter is made up of atoms, but what is an atom made out of? Chemists describe the structure of atoms using models. This section will cover the Bohr model, photoelectric effect, absorption and emission spectra, quantum numbers, and electron configurations.", "node_slug": "electronic-structure-of-atoms", "render_type": "Topic", "topic_page_url": "/science/chemistry/electronic-structure-of-atoms", "extended_slug": "science/chemistry/electronic-structure-of-atoms", "kind": "Topic", "slug": "electronic-structure-of-atoms"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/periodic-table/", "id": "periodic-table", "hide": false, "title": "Periodic table", "child_data": [{"kind": "Topic", "id": "xc2d9df6f"}, {"kind": "Topic", "id": "x01c14bf5"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/periodic-table/copy-of-periodic-table-of-elements/", "id": "copy-of-periodic-table-of-elements", "hide": false, "title": "Introduction to the periodic table", "child_data": [{"kind": "Video", "id": "xf064b16d"}, {"kind": "Video", "id": "x68205349"}, {"kind": "Video", "id": "xf654ebd5"}, {"kind": "Video", "id": "x545922ca"}, {"kind": "Video", "id": "xe67b83bf"}], "children": [{"path": "khan/science/chemistry/periodic-table/copy-of-periodic-table-of-elements/periodic-table-introduction/", "id": "t_f8bB1kf6M", "title": "The periodic table - classification of elements", "kind": "Video", "description": "Common terms describing the ways elements are classified in the periodic table.", "slug": "periodic-table-introduction"}, {"path": "khan/science/chemistry/periodic-table/copy-of-periodic-table-of-elements/periodic-table-groups/", "id": "UXOcWAfBdZg", "title": "Groups of the periodic table", "kind": "Video", "description": "What is a group in the periodic table, and what do elements in a group have in common?", "slug": "periodic-table-groups"}, {"path": "khan/science/chemistry/periodic-table/copy-of-periodic-table-of-elements/periodic-table-valence-electrons/", "id": "akm5H2JsccI", "title": "The periodic table - valence electrons for main group", "kind": "Video", "description": "How to determine the number of valence electrons and draw Lewis structures for main group elements starting from the electron configuration.", "slug": "periodic-table-valence-electrons"}, {"path": "khan/science/chemistry/periodic-table/copy-of-periodic-table-of-elements/periodic-table-transition-metals/", "id": "kCM2mSb4qIU", "title": "The periodic table - transition metals", "kind": "Video", "description": "The definition of a transition metal, and how to write the electron configuration including examples for Fe and Zn.", "slug": "periodic-table-transition-metals"}, {"path": "khan/science/chemistry/periodic-table/copy-of-periodic-table-of-elements/valence-electrons-lewis/", "id": "NYtPw0WiUCo", "title": "Valence electrons and bonding", "kind": "Video", "description": "How to get Lewis structures from electron configuration, and how valence electrons are involved in forming bonds.", "slug": "valence-electrons-lewis"}], "in_knowledge_map": false, "description": "How are the elements organized in the periodic table? This tutorial will cover the classification of elements including groups, transition metals, and valence electrons.", "node_slug": "copy-of-periodic-table-of-elements", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/periodic-table/copy-of-periodic-table-of-elements", "extended_slug": "science/chemistry/periodic-table/copy-of-periodic-table-of-elements", "kind": "Topic", "slug": "copy-of-periodic-table-of-elements"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/", "id": "periodic-table-trends-bonding", "hide": false, "title": "Periodic table trends", "child_data": [{"kind": "Video", "id": "x2875bdf8"}, {"kind": "Video", "id": "xdfc0221e"}, {"kind": "Video", "id": "426005"}, {"kind": "Video", "id": "xaed272e3"}, {"kind": "Video", "id": "xe2b4547d"}, {"kind": "Video", "id": "xdb3555d5"}, {"kind": "Video", "id": "x4562bba6"}, {"kind": "Video", "id": "xb9779c70"}, {"kind": "Video", "id": "x109b2662"}, {"kind": "Video", "id": "x8dafd3b7"}, {"kind": "Video", "id": "xb1497461"}], "children": [{"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/atomic-radius-trend/", "id": "q--2WP8wXtk", "title": "Atomic radius trends on periodic table", "kind": "Video", "description": "How atomic radius is defined, and trends across a period and down a group.", "slug": "atomic-radius-trend"}, {"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/atomic-and-ionic-radii/", "id": "rKoIcgBM4Vg", "title": "Atomic and ionic radii", "kind": "Video", "description": "Explaining group and period trends in atomic and ionic radii.", "slug": "atomic-and-ionic-radii"}, {"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/mini-video-on-ion-size/", "id": "HBi8xjMchZc", "title": "Mini-video on ion size", "kind": "Video", "description": "Correcting a mistake and learning a bit about ion size", "slug": "mini-video-on-ion-size"}, {"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/ionization-energy-trends/", "id": "5CBs36jtZxY", "title": "Ionization energy trends", "kind": "Video", "description": "Definition of ion and ionization energy, and trends in ionization energy across a period and down a group.", "slug": "ionization-energy-trends"}, {"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/group-trend-for-ionization-energy/", "id": "vQLcxlvK7Ik", "title": "Group trend for ionization energy", "kind": "Video", "description": "Explaining trend in ionization energy down a group using concepts of nuclear charge, electron shielding, and distance of electrons from nucleus", "slug": "group-trend-for-ionization-energy"}, {"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/period-trend-for-ionization-energy/", "id": "DMDcn2j-8ig", "title": "Period trend for ionization energy", "kind": "Video", "description": "Explaining trends in ionization energy across a period using nuclear charge, shielding, and distance of electrons from nucleus", "slug": "period-trend-for-ionization-energy"}, {"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/first-and-second-ionization-energy/", "id": "uVWquWFjnCw", "title": "First and second ionization energy", "kind": "Video", "description": "Comparing first and second ionization energy of Li using nuclear charge, shielding, and distance of electrons from nucleus", "slug": "first-and-second-ionization-energy"}, {"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/electron-affinity/", "id": "j0xQmCPXTvY", "title": "Electron affinity", "kind": "Video", "description": "Definition of electron affinity, and comparing electron affinities of LI, Be, and B", "slug": "electron-affinity"}, {"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/period-trend-for-electron-affinity/", "id": "M7eAyjGZd-4", "title": "Period trend for electron affinity", "kind": "Video", "description": "Explaining general trends in electron affinity across the second period, including the exceptions N and Ne", "slug": "period-trend-for-electron-affinity"}, {"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/electronegativity-trends/", "id": "Rr7LhdSKMxY", "title": "Electronegativity", "kind": "Video", "description": "Defines electronegativity and compares to electron affinity. Explains group and period trends in electronegativity using atomic radii.", "slug": "electronegativity-trends"}, {"path": "khan/science/chemistry/periodic-table/periodic-table-trends-bonding/metallic-nature-trends/", "id": "pAjluTxSYgY", "title": "Metallic nature", "kind": "Video", "description": "Properties of metals and how we can explain their properties using electron \"sea\" model.", "slug": "metallic-nature-trends"}], "in_knowledge_map": false, "description": "Have you ever wondered why it is called the \"periodic\" table? The elements are organized based on their electronic structure, which results in some interesting trends in atomic properties as you move down a group or across a period. This tutorial will try to explain some of those trends!", "node_slug": "periodic-table-trends-bonding", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/periodic-table/periodic-table-trends-bonding", "extended_slug": "science/chemistry/periodic-table/periodic-table-trends-bonding", "kind": "Topic", "slug": "periodic-table-trends-bonding"}], "in_knowledge_map": false, "description": "A little more than a century ago, the chemist Dmitri Mendeleev published an early form of the periodic table, which organizes the known elements of our world. His method of classifying the elements was so useful that we still use it even today. We will learn to apply this elegant table to an understanding of atomic structure and properties, including periodic table trends.", "node_slug": "periodic-table", "render_type": "Topic", "topic_page_url": "/science/chemistry/periodic-table", "extended_slug": "science/chemistry/periodic-table", "kind": "Topic", "slug": "periodic-table"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/chemical-bonds/", "id": "chemical-bonds", "hide": false, "title": "Chemical bonds", "child_data": [{"kind": "Topic", "id": "x1335c76f"}, {"kind": "Topic", "id": "x790005be"}, {"kind": "Topic", "id": "x3a1aab63"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chemical-bonds/types-chemical-bonds/", "id": "types-chemical-bonds", "hide": false, "title": "Types of chemical bonds", "child_data": [{"kind": "Video", "id": "389051"}, {"kind": "Video", "id": "x8dafd3b7"}, {"kind": "Video", "id": "x57ecb61f"}, {"kind": "Video", "id": "xb1497461"}, {"kind": "Video", "id": "413005"}], "children": [{"path": "khan/science/chemistry/chemical-bonds/types-chemical-bonds/ionic-covalent-and-metallic-bonds/", "id": "CGA8sRwqIFg", "title": "Ionic, covalent, and metallic bonds", "kind": "Video", "description": "Introduction to ionic, covalent, polar covalent and metallic bonds.", "slug": "ionic-covalent-and-metallic-bonds"}, {"path": "khan/science/chemistry/chemical-bonds/types-chemical-bonds/electronegativity-trends/", "id": "Rr7LhdSKMxY", "title": "Electronegativity", "kind": "Video", "description": "Defines electronegativity and compares to electron affinity. Explains group and period trends in electronegativity using atomic radii.", "slug": "electronegativity-trends"}, {"path": "khan/science/chemistry/chemical-bonds/types-chemical-bonds/electronegativity-and-chemical-bonds/", "id": "126N4hox9YA", "title": "Electronegativity and bonding", "kind": "Video", "description": "Electronegativity differences in bonding using Pauling scale. Using differences in electronegativity to classify bonds as covalent, polar covalent, or ionic.", "slug": "electronegativity-and-chemical-bonds"}, {"path": "khan/science/chemistry/chemical-bonds/types-chemical-bonds/metallic-nature-trends/", "id": "pAjluTxSYgY", "title": "Metallic nature", "kind": "Video", "description": "Properties of metals and how we can explain their properties using electron \"sea\" model.", "slug": "metallic-nature-trends"}, {"path": "khan/science/chemistry/chemical-bonds/types-chemical-bonds/covalent-networks-metallic-and-ionic-crystals/", "id": "Rw_pDVbnfQk", "title": "Covalent networks, metallic crystals, and ionic crystals", "kind": "Video", "description": "Covalent networks, metallic crystals, and ionic crystals: Some of the strongest molecular structures.", "slug": "covalent-networks-metallic-and-ionic-crystals"}], "in_knowledge_map": false, "description": "In this tutorial, we will learn about electronegativity and the different types of chemical bonds.", "node_slug": "types-chemical-bonds", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-bonds/types-chemical-bonds", "extended_slug": "science/chemistry/chemical-bonds/types-chemical-bonds", "kind": "Topic", "slug": "types-chemical-bonds"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/", "id": "copy-of-dot-structures", "hide": false, "title": "Dot structures", "child_data": [{"kind": "Video", "id": "x4b64d771"}, {"kind": "Video", "id": "x999bc93d"}, {"kind": "Video", "id": "xc17639e8"}, {"kind": "Video", "id": "x072a19ee"}, {"kind": "Video", "id": "xdf5e267d"}, {"kind": "Video", "id": "xdc597ee2"}, {"kind": "Video", "id": "x13e2fe6f"}, {"kind": "Video", "id": "x6968389f"}, {"kind": "Video", "id": "x14b19da7"}, {"kind": "Video", "id": "x0795dd14"}], "children": [{"path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/drawing-dot-structures/", "id": "p7Fsb21B2Xg", "title": "Drawing dot structures", "kind": "Video", "description": "Guidelines for drawing Lewis dot structures.", "slug": "drawing-dot-structures"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/formal-charge-and-dot-structures/", "id": "dNPs-cr_6Bk", "title": "Formal charge and dot structures", "kind": "Video", "description": "Definition of formal charge, and how minimization of formal charge can help choose the more stable dot structure.", "slug": "formal-charge-and-dot-structures"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/resonance-and-dot-structures/", "id": "bUCu7bPkZeI", "title": "Resonance and dot structures", "kind": "Video", "description": "Drawing resonance structures and resonance hybrid using example of nitrate anion.", "slug": "resonance-and-dot-structures"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/vsepr-for-2-electron-clouds/", "id": "97POZGcfoY8", "title": "VSEPR for 2 electron clouds", "kind": "Video", "description": "Definition of VSEPR and examples of molecules with two electron clouds.", "slug": "vsepr-for-2-electron-clouds"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/vsepr-for-3-electron-clouds/", "id": "3RDytvJYehY", "title": "VSEPR for 3 electron clouds", "kind": "Video", "description": "VSEPR for three electron clouds including examples for trigonal planar and bent molecules.", "slug": "vsepr-for-3-electron-clouds"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/more-on-the-dot-structure-for-sulfur-dioxide/", "id": "Fr_La6MrAfM", "title": "More on the dot structure for sulfur dioxide", "kind": "Video", "description": "How to analyze different ways to draw the dot structure for sulfur dioxide", "slug": "more-on-the-dot-structure-for-sulfur-dioxide"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/vsepr-for-4-electron-clouds/", "id": "ka8Yt4bTODs", "title": "VSEPR for 4 electron clouds", "kind": "Video", "description": "VSEPR for molecules with four electron clouds including examples for tetrahedral, trigonal pyramidal, and bent molecules.", "slug": "vsepr-for-4-electron-clouds"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/vsepr-for-5-electron-clouds/", "id": "0na0xtIHkXA", "title": "VSEPR for 5 electron clouds", "kind": "Video", "description": "VSEPR for molecules with five electron clouds including examples for trigonal bipyramidal and seesaw-shaped molecules.", "slug": "vsepr-for-5-electron-clouds"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/vsepr-for-5-electron-clouds-continued/", "id": "ufzlgOyWBHE", "title": "VSEPR for 5 electron clouds (continued)", "kind": "Video", "description": "Part II of using VSEPR for five electron clouds including examples for T-shaped and linear molecules.", "slug": "vsepr-for-5-electron-clouds-continued"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-dot-structures/vsepr-for-6-electron-clouds/", "id": "WEoml1Fs26I", "title": "VSEPR for 6 electron clouds", "kind": "Video", "description": "VSEPR for six electron clouds including examples for octahedral, square pyramidal, and planar molecules.", "slug": "vsepr-for-6-electron-clouds"}], "in_knowledge_map": false, "description": "We can\u2019t always see molecules, but we can always simplify and draw depictions of them with pen and paper. It is the language of chemistry that we want you to get acquainted with. You will learn to draw Lewis dot structures and resonance structures, assign formal charges, and analyze the geometry of molecules and ions.", "node_slug": "copy-of-dot-structures", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-bonds/copy-of-dot-structures", "extended_slug": "science/chemistry/chemical-bonds/copy-of-dot-structures", "kind": "Topic", "slug": "copy-of-dot-structures"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chemical-bonds/copy-of-covalent-bonds/", "id": "copy-of-covalent-bonds", "hide": false, "title": "Hybridization and hybrid orbitals", "child_data": [{"kind": "Video", "id": "x67a13ebc"}, {"kind": "Video", "id": "x0213e20b"}, {"kind": "Video", "id": "x3f29bc33"}, {"kind": "Video", "id": "x3fb4948a"}, {"kind": "Video", "id": "xafb6fb15"}], "children": [{"path": "khan/science/chemistry/chemical-bonds/copy-of-covalent-bonds/sp3-hybrid-orbital-jay-final/", "id": "JHgTNNX01r4", "title": "Sp3 hybridization", "kind": "Video", "description": "Sp3 hybrid orbitals and properties of sigma bonds.", "slug": "sp3-hybrid-orbital-jay-final"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-covalent-bonds/steric-number-sp3-hybridization/", "id": "BM-My1AheLw", "title": "Steric number and sp3 hybridization", "kind": "Video", "description": "Using steric number to calculate number of hybrid orbitals.", "slug": "steric-number-sp3-hybridization"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-covalent-bonds/sp2-hybridization-jay-final/", "id": "ROzkyTgscGg", "title": "Sp2 hybridization", "kind": "Video", "description": "Sp2 hybrid orbitals and properties of pi bonds.", "slug": "sp2-hybridization-jay-final"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-covalent-bonds/sp-hybridization-jay-final/", "id": "BRHfy7envyQ", "title": "Sp hybridization", "kind": "Video", "description": "Sp hybrid orbitals and properties of triple bonds.", "slug": "sp-hybridization-jay-final"}, {"path": "khan/science/chemistry/chemical-bonds/copy-of-covalent-bonds/organic-hybridization-practice/", "id": "GuaozMpFS3w", "title": "Organic hybridization practice", "kind": "Video", "description": "Examples of identifying hybridization and geometry for atoms in organic molecules.", "slug": "organic-hybridization-practice"}], "in_knowledge_map": false, "description": "In this tutorial, we will learn about sp3, sp2, and sp hybridization.", "node_slug": "copy-of-covalent-bonds", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-bonds/copy-of-covalent-bonds", "extended_slug": "science/chemistry/chemical-bonds/copy-of-covalent-bonds", "kind": "Topic", "slug": "copy-of-covalent-bonds"}], "in_knowledge_map": false, "description": "Chemical bonds are the glue that hold molecules together. We will learn about the different kinds of bonds, ways chemists draw bonds and molecules, and how the type of chemical bonding affects the bulk properties of a material. We will cover electronegativity, Lewis dot structures, VSEPR, bond hybridization, and ionic, covalent, and metallic bonds.", "node_slug": "chemical-bonds", "render_type": "Topic", "topic_page_url": "/science/chemistry/chemical-bonds", "extended_slug": "science/chemistry/chemical-bonds", "kind": "Topic", "slug": "chemical-bonds"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/", "id": "gases-and-kinetic-molecular-theory", "hide": false, "title": "Gases and kinetic molecular theory", "child_data": [{"kind": "Topic", "id": "x88901cc3"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/", "id": "ideal-gas-laws", "hide": false, "title": "Ideal gas equation", "child_data": [{"kind": "Video", "id": "408019"}, {"kind": "Video", "id": "x74086dc7"}, {"kind": "Video", "id": "417005"}, {"kind": "Video", "id": "418011"}, {"kind": "Video", "id": "351060"}, {"kind": "Video", "id": "423006"}, {"kind": "Video", "id": "428007"}, {"kind": "Video", "id": "6022729"}, {"kind": "Video", "id": "x7abce25c"}, {"kind": "Article", "id": "x9f4c384a"}], "children": [{"path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/ideal-gas-equation-pv-nrt/", "id": "WScwPIPqZa0", "title": "Ideal gas equation: PV = nRT", "kind": "Video", "description": "Intuition behind the ideal gas equation: PV=nRT.", "slug": "ideal-gas-equation-pv-nrt"}, {"path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/deflategate-ideal-gas-law/", "id": "G2JdRB3bdFM", "title": "Deflate gate", "kind": "Video", "description": "Using the ideal gas equation to calculate the change in air pressure in a football at different temperatures.", "slug": "deflategate-ideal-gas-law"}, {"path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/ideal-gas-equation-example-1/", "id": "erjMiErRgSQ", "title": "Ideal gas equation example 1", "kind": "Video", "description": "Figuring out the number of moles of gas we have using the ideal gas equation: PV=nRT.", "slug": "ideal-gas-equation-example-1"}, {"path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/ideal-gas-equation-example-2/", "id": "GwoX_BemwHs", "title": "Ideal gas equation example 2", "kind": "Video", "description": "PV/T is a constant. Figuring out the volume of an ideal gas at standard temperature and pressure (STP).", "slug": "ideal-gas-equation-example-2"}, {"path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/ideal-gas-equation-example-3/", "id": "69V-60sga3M", "title": "Ideal gas equation example 3", "kind": "Video", "description": "Figuring out the mass of Oxygen we have at a given P, V, and T, and why we need to check the units of R.", "slug": "ideal-gas-equation-example-3"}, {"path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/ideal-gas-example-4/", "id": "Osl6HEDZZ-E", "title": "Ideal gas equation example 4", "kind": "Video", "description": "Figuring out the molar mass of a mystery molecule at STP.", "slug": "ideal-gas-example-4"}, {"path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/partial-pressure/", "id": "d4bqNf37mBY", "title": "Partial pressure example", "kind": "Video", "description": "Figuring out the partial pressures of various gases in a container given the mass percent composition.", "slug": "partial-pressure"}, {"path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/vapor-pressure-example/", "id": "-QpkmwIoMaY", "title": "Vapor pressure example", "kind": "Video", "description": "Vapor pressure example using the ideal gas law.", "slug": "vapor-pressure-example"}, {"path": "khan/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws/maxwell-boltzmann-distribution/", "id": "xQ9D4Jz95-A", "title": "Maxwell Boltzmann distribution", "kind": "Video", "description": "Using the Maxwell-Boltzmann distribution to visualize the distribution of speeds of particles at different temperatures.", "slug": "maxwell-boltzmann-distribution"}], "in_knowledge_map": false, "description": "In this tutorial, Sal shows you how to use the ideal gas equation in calculations.", "node_slug": "ideal-gas-laws", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws", "extended_slug": "science/chemistry/gases-and-kinetic-molecular-theory/ideal-gas-laws", "kind": "Topic", "slug": "ideal-gas-laws"}], "in_knowledge_map": false, "description": "Properties of gases can be modeled using some relatively simple equations, which we can relate to the behavior of individual gas molecules. We will learn about the ideal gas law, vapor pressure, partial pressure, and the Maxwell Boltzmann distribution.", "node_slug": "gases-and-kinetic-molecular-theory", "render_type": "Topic", "topic_page_url": "/science/chemistry/gases-and-kinetic-molecular-theory", "extended_slug": "science/chemistry/gases-and-kinetic-molecular-theory", "kind": "Topic", "slug": "gases-and-kinetic-molecular-theory"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/", "id": "states-of-matter-and-intermolecular-forces", "hide": false, "title": "States of matter and intermolecular forces", "child_data": [{"kind": "Topic", "id": "x33b4144d"}, {"kind": "Topic", "id": "x48c4dde9"}, {"kind": "Topic", "id": "xd5bc082a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/", "id": "states-of-matter", "hide": false, "title": "States of matter", "child_data": [{"kind": "Video", "id": "360055"}, {"kind": "Video", "id": "366059"}, {"kind": "Video", "id": "xf8a20837"}, {"kind": "Video", "id": "418012"}, {"kind": "Video", "id": "432003"}, {"kind": "Video", "id": "6022730"}, {"kind": "Video", "id": "417006"}, {"kind": "Video", "id": "373049"}], "children": [{"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/states-of-matter/", "id": "pKvo0XWZtjo", "title": "States of matter", "kind": "Video", "description": "Introduction to the states or phases of matter.", "slug": "states-of-matter"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/states-of-matter-follow-up/", "id": "WenwtcuqOj8", "title": "States of matter follow-up", "kind": "Video", "description": "More on plasma and hydrogen bonds.", "slug": "states-of-matter-follow-up"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/specific-heat-and-latent-leat-of-fusion-and-vaporization-2/", "id": "WU7TfO-iaK8", "title": "Specific heat and latent leat of fusion and vaporization", "kind": "Video", "description": "Defining specific heat, heat of fusion, and heat of vaporization. How to calculate the amount of heat to change the temperature of water and the energy required to change for a phase change.", "slug": "specific-heat-and-latent-leat-of-fusion-and-vaporization-2"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/specific-heat-heat-of-fusion-and-vaporization/", "id": "zz4KbvF_X-0", "title": "Specific heat, heat of fusion and vaporization example", "kind": "Video", "description": "Specific heat and phase changes: Calculating how much heat is needed to convert 200 g of ice at -10 degrees C to 110 degree steam.", "slug": "specific-heat-heat-of-fusion-and-vaporization"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/chilling-water-problem/", "id": "lsXcKgjg8Hs", "title": "Chilling water problem", "kind": "Video", "description": "How much ice at -10 degrees C is necessary to get 500 g of water down to 0 degrees C?", "slug": "chilling-water-problem"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/change-of-state-example/", "id": "tvO0358YUYM", "title": "Change of state example", "kind": "Video", "description": "Specific heat capacity and enthalpy of vaporization example: calculating how much energy it takes to vaporize 1.00 kg of ethanol starting from 20 degrees C.", "slug": "change-of-state-example"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/vapor-pressure/", "id": "hA5jddDYcyg", "title": "Vapor pressure", "kind": "Video", "description": "Vapor pressure, volatility, and evaporation.", "slug": "vapor-pressure"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/phase-diagrams/", "id": "Qp87Z4m8R-w", "title": "Phase diagrams", "kind": "Video", "description": "Understanding and interpreting phase diagrams", "slug": "phase-diagrams"}], "in_knowledge_map": false, "description": "", "node_slug": "states-of-matter", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter", "extended_slug": "science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter", "kind": "Topic", "slug": "states-of-matter"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/introduction-to-intermolecular-forces/", "id": "introduction-to-intermolecular-forces", "hide": false, "title": "Introduction to intermolecular forces", "child_data": [{"kind": "Video", "id": "371058"}, {"kind": "Video", "id": "410034"}, {"kind": "Video", "id": "x097b2cfb"}, {"kind": "Video", "id": "x451fa8cc"}], "children": [{"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/introduction-to-intermolecular-forces/van-der-waals-forces/", "id": "8qfzpJvsp04", "title": "Van der Waals forces", "kind": "Video", "description": "Van der Waals forces: London dispersion forces, dipole-dipole forces, \u00a0and hydrogen bonding.", "slug": "van-der-waals-forces"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/introduction-to-intermolecular-forces/solubility/", "id": "zjIVJh4JLNo", "title": "Solubility and intermolecular forces", "kind": "Video", "description": "Solubility of salt and gas solutes in liquid solvent.", "slug": "solubility"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/introduction-to-intermolecular-forces/surface-tension/", "id": "_RTF0DAHBBM", "title": "Surface tension", "kind": "Video", "description": "Surface tension in water, and how the surface tension is related to hydrogen bonding.", "slug": "surface-tension"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/introduction-to-intermolecular-forces/capillary-action-and-why-we-see-a-meniscus/", "id": "eQXGpturk3A", "title": "Capillary action and why we see a meniscus", "kind": "Video", "description": "How capillary action and the meniscus are related to intermolecular forces in water.", "slug": "capillary-action-and-why-we-see-a-meniscus"}], "in_knowledge_map": false, "description": "", "node_slug": "introduction-to-intermolecular-forces", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/states-of-matter-and-intermolecular-forces/introduction-to-intermolecular-forces", "extended_slug": "science/chemistry/states-of-matter-and-intermolecular-forces/introduction-to-intermolecular-forces", "kind": "Topic", "slug": "introduction-to-intermolecular-forces"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/mixtures-and-solutions/", "id": "mixtures-and-solutions", "hide": false, "title": "Mixtures and solutions", "child_data": [{"kind": "Video", "id": "364063"}, {"kind": "Video", "id": "421007"}], "children": [{"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/mixtures-and-solutions/suspensions-colloids-and-solutions/", "id": "3ROWXs3jtQU", "title": "Suspensions, colloids and solutions", "kind": "Video", "description": "Suspensions, colloids and solutions. The difference between molarity and molality.", "slug": "suspensions-colloids-and-solutions"}, {"path": "khan/science/chemistry/states-of-matter-and-intermolecular-forces/mixtures-and-solutions/boiling-point-elevation-and-freezing-point-supression/", "id": "z9LxdqYntlU", "title": "Boiling point elevation and freezing point depression", "kind": "Video", "description": "Raising or lowering the boiling or freezing point of a solution by adding solute.", "slug": "boiling-point-elevation-and-freezing-point-supression"}], "in_knowledge_map": false, "description": "", "node_slug": "mixtures-and-solutions", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/states-of-matter-and-intermolecular-forces/mixtures-and-solutions", "extended_slug": "science/chemistry/states-of-matter-and-intermolecular-forces/mixtures-and-solutions", "kind": "Topic", "slug": "mixtures-and-solutions"}], "in_knowledge_map": false, "description": "Have you ever wondered how some insects are able to \"skate\" on the surface of water? We will learn about how intermolecular forces make this possible. We will also cover liquids, solids, mixtures, and phase changes.", "node_slug": "states-of-matter-and-intermolecular-forces", "render_type": "Topic", "topic_page_url": "/science/chemistry/states-of-matter-and-intermolecular-forces", "extended_slug": "science/chemistry/states-of-matter-and-intermolecular-forces", "kind": "Topic", "slug": "states-of-matter-and-intermolecular-forces"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/chemical-equilibrium/", "id": "chemical-equilibrium", "hide": false, "title": "Chemical equilibrium", "child_data": [{"kind": "Topic", "id": "xeb38d12b"}, {"kind": "Topic", "id": "x612afbe0"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chemical-equilibrium/equilibrium-constant/", "id": "equilibrium-constant", "hide": false, "title": "Equilibrium constant", "child_data": [{"kind": "Video", "id": "429004"}, {"kind": "Video", "id": "385052"}, {"kind": "Video", "id": "403030"}, {"kind": "Video", "id": "419007"}], "children": [{"path": "khan/science/chemistry/chemical-equilibrium/equilibrium-constant/reactions-in-equilibrium/", "id": "CGJjjm7-DJ4", "title": "Reactions in equilibrium", "kind": "Video", "description": "Equilibrium reactions and constants.", "slug": "reactions-in-equilibrium"}, {"path": "khan/science/chemistry/chemical-equilibrium/equilibrium-constant/keq-intuition-mathy-and-not-necessary-to-progress/", "id": "ONBJo7dXJm8", "title": "Keq intuition (mathy and not necessary to progress)", "kind": "Video", "description": "A probabilistic look at how molecules react to develop the intuition behind the equilibrium constant formula.", "slug": "keq-intuition-mathy-and-not-necessary-to-progress"}, {"path": "khan/science/chemistry/chemical-equilibrium/equilibrium-constant/keq-derivation-intuition-can-skip-bit-mathy/", "id": "psLX080RQR8", "title": "Keq derivation intuition (can skip; bit mathy)", "kind": "Video", "description": "A more concrete attempt at showing how the probabilities of molecules reacting is related to their concentration.", "slug": "keq-derivation-intuition-can-skip-bit-mathy"}, {"path": "khan/science/chemistry/chemical-equilibrium/equilibrium-constant/heterogenous-equilibrium/", "id": "TsXlTWgyItw", "title": "Heterogeneous equilibrium", "kind": "Video", "description": "Ignoring the solvent or the solid state molecules when calculating the equilibrium constant.", "slug": "heterogenous-equilibrium"}], "in_knowledge_map": false, "description": "In this tutorial, we will examine the equilibrium state and learn how to write the expression for the equilibrium constant.", "node_slug": "equilibrium-constant", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-equilibrium/equilibrium-constant", "extended_slug": "science/chemistry/chemical-equilibrium/equilibrium-constant", "kind": "Topic", "slug": "equilibrium-constant"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chemical-equilibrium/factors-that-affect-chemical-equilibrium/", "id": "factors-that-affect-chemical-equilibrium", "hide": false, "title": "Factors that affect chemical equilibrium", "child_data": [{"kind": "Video", "id": "388057"}, {"kind": "Article", "id": "x028450c6"}], "children": [{"path": "khan/science/chemistry/chemical-equilibrium/factors-that-affect-chemical-equilibrium/le-chatelier-s-principle/", "id": "4-fEvpVNTlE", "title": "Le Chatelier's principle", "kind": "Video", "description": "Le Chatelier's Principle regarding the \"stressing\" of reactions in equilibrium", "slug": "le-chatelier-s-principle"}], "in_knowledge_map": false, "description": "In this tutorial, we will learn about the different factors that affect a reaction mixture at equilibrium.", "node_slug": "factors-that-affect-chemical-equilibrium", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chemical-equilibrium/factors-that-affect-chemical-equilibrium", "extended_slug": "science/chemistry/chemical-equilibrium/factors-that-affect-chemical-equilibrium", "kind": "Topic", "slug": "factors-that-affect-chemical-equilibrium"}], "in_knowledge_map": false, "description": "Many chemical reactions are reversible, and the forward and backward reactions can occur at the same time. When the rate of the forward reaction is equal to the rate of the backward reaction, we call that a dynamic equilibrium. We will learn how equilibrium can be described by the equilibrium constant K, and how different factors than can affect the chemical equilibrium.", "node_slug": "chemical-equilibrium", "render_type": "Topic", "topic_page_url": "/science/chemistry/chemical-equilibrium", "extended_slug": "science/chemistry/chemical-equilibrium", "kind": "Topic", "slug": "chemical-equilibrium"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/acids-and-bases-topic/", "id": "acids-and-bases-topic", "hide": false, "title": "Acids and bases", "child_data": [{"kind": "Topic", "id": "xb79ef290"}, {"kind": "Topic", "id": "x54d1e4b5"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/", "id": "acids-and-bases", "hide": false, "title": "Acids, bases, and pH", "child_data": [{"kind": "Video", "id": "xd9df8b54"}, {"kind": "Video", "id": "x555c28b0"}, {"kind": "Video", "id": "x389f5189"}, {"kind": "Video", "id": "xff203ebc"}, {"kind": "Video", "id": "373050"}], "children": [{"path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/arrhenius-definition-of-acids-and-bases/", "id": "Y4HzGldIAss", "title": "Arrhenius definition of acids and bases", "kind": "Video", "description": "Arrhenius definition of acids and bases", "slug": "arrhenius-definition-of-acids-and-bases"}, {"path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/bronsted-lowry-definition-of-acids-and-bases/", "id": "XVOU9c3crbc", "title": "Bronsted-Lowry definition of acids and bases", "kind": "Video", "description": "Bronsted-Lowry definition of acids and bases. Conjugate acids and bases.", "slug": "bronsted-lowry-definition-of-acids-and-bases"}, {"path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/autoionization-water/", "id": "NUyYlRxMtcs", "title": "Autoionization of water", "kind": "Video", "description": "Autoionization of water into hydronium and hydroxide ions", "slug": "autoionization-water"}, {"path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/introduction-to-definition-of-ph/", "id": "J7-GewgqWUQ", "title": "Definition of pH", "kind": "Video", "description": "Introduction to pH and the pH scale. Examples of calculating pH of pure water, bleach, and orange juice.", "slug": "introduction-to-definition-of-ph"}, {"path": "khan/science/chemistry/acids-and-bases-topic/acids-and-bases/ph-poh-of-strong-acids-and-bases/", "id": "tS2YJPmKOFQ", "title": "pH, pOH of strong acids and bases", "kind": "Video", "description": "Deriving the relationship between pKw, pH, and pOH. Calculating the pH or pOH of strong acids and bases.", "slug": "ph-poh-of-strong-acids-and-bases"}], "in_knowledge_map": false, "description": "What makes a compound acidic or basic? We will learn about the different definitions for acids and bases, and how we measure how acidic or basic a substance is. We will be putting our chemical equilibrium knowledge to good use when we look at the reactivity of weak acids and bases.", "node_slug": "acids-and-bases", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/acids-and-bases-topic/acids-and-bases", "extended_slug": "science/chemistry/acids-and-bases-topic/acids-and-bases", "kind": "Topic", "slug": "acids-and-bases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria/", "id": "copy-of-acid-base-equilibria", "hide": false, "title": "Acid-base equilibria", "child_data": [{"kind": "Video", "id": "417007"}, {"kind": "Video", "id": "362063"}, {"kind": "Video", "id": "xe0b51228"}, {"kind": "Video", "id": "xe962fbd5"}, {"kind": "Video", "id": "x1676f258"}, {"kind": "Video", "id": "xcb0e59e6"}, {"kind": "Video", "id": "x3029a604"}], "children": [{"path": "khan/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria/conjugate-acids-and-bases/", "id": "0LM6wPpypxM", "title": "Conjugate acids and bases", "kind": "Video", "description": "Introduction to conjugate acids and bases", "slug": "conjugate-acids-and-bases"}, {"path": "khan/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria/pka-and-pkb-relationship/", "id": "3Gm4nAAc3zc", "title": "pKa and pKb relationship", "kind": "Video", "description": "The Ka and Kb relationship and pKa and pKb relationship between conjugate acids and bases.", "slug": "pka-and-pkb-relationship"}, {"path": "khan/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria/relationship-between-ka-and-kb/", "id": "DGMs81-Rp1o", "title": "Relationship between Ka and Kb", "kind": "Video", "description": "The relationship between Ka and Kb, and pKa and pKb. Examples of finding Ka of a weak acid given Kb of the conjugate base.", "slug": "relationship-between-ka-and-kb"}, {"path": "khan/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria/weak-acid-equilibrium/", "id": "icNOBmKjDLo", "title": "Weak acid equilibrium", "kind": "Video", "description": "Quick overview of Ka and pKa. Example of calculating the pH of a weak acid solution.", "slug": "weak-acid-equilibrium"}, {"path": "khan/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria/weak-base-equilibrium/", "id": "xGE3sEz6U9Y", "title": "Weak base equilibrium", "kind": "Video", "description": "Quick overview of Kb and pKb. Examples of calculating the pH of a weak base solution.", "slug": "weak-base-equilibrium"}, {"path": "khan/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria/acid-base-properties-of-salts/", "id": "HwkEQfsJenk", "title": "Acid-base properties of salts", "kind": "Video", "description": "Examples of different kinds of neutralization reactions, and analyzing the pH of the resulting salt solution.", "slug": "acid-base-properties-of-salts"}, {"path": "khan/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria/ph-of-salt-solutions/", "id": "XZWoMXVANww", "title": "pH of salt solutions", "kind": "Video", "description": "Examples of calculating pH of 0.25 M solution of sodium acetate, and calculating the pH of 0.050 M solution of ammonium chloride.", "slug": "ph-of-salt-solutions"}], "in_knowledge_map": false, "description": "In this tutorial, we will learn how the strength of an acid or base is related to the equilibrium reaction that is happening in our solution. We will also see what happens when we mix solutions of acids and bases in neutralization reactions.", "node_slug": "copy-of-acid-base-equilibria", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria", "extended_slug": "science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria", "kind": "Topic", "slug": "copy-of-acid-base-equilibria"}], "in_knowledge_map": false, "description": "In this section we will be talking about the basics of acids and bases and how acid-base chemistry is related to equilibria. We will cover acid and base definitions, pH, acid-base equilibria, acid-base properties of salts, and the pH of salt solutions.", "node_slug": "acids-and-bases-topic", "render_type": "Topic", "topic_page_url": "/science/chemistry/acids-and-bases-topic", "extended_slug": "science/chemistry/acids-and-bases-topic", "kind": "Topic", "slug": "acids-and-bases-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/acid-base-equilibrium/", "id": "acid-base-equilibrium", "hide": false, "title": "Buffers, titrations, and solubility equilibria", "child_data": [{"kind": "Topic", "id": "x175ee23b"}, {"kind": "Topic", "id": "x0944f998"}, {"kind": "Topic", "id": "x7e4d1539"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/acid-base-equilibrium/buffer-solutions/", "id": "buffer-solutions", "hide": false, "title": "Buffer solutions", "child_data": [{"kind": "Video", "id": "x39758a10"}, {"kind": "Video", "id": "x177cf25c"}, {"kind": "Video", "id": "6022720"}, {"kind": "Video", "id": "x81deb5b6"}], "children": [{"path": "khan/science/chemistry/acid-base-equilibrium/buffer-solutions/buffer-system/", "id": "gjKmQ501sAg", "title": "Introduction to buffers", "kind": "Video", "description": "Introduction to buffer systems, which regulate pH in blood", "slug": "buffer-system"}, {"path": "khan/science/chemistry/acid-base-equilibrium/buffer-solutions/common-ion-effect/", "id": "223KLPnJCBI", "title": "Common ion effect and buffers", "kind": "Video", "description": "Example of calculating the pH of solution that is 1.00 M acetic acid and 1.00 M sodium acetate using ICE table. Another example of calculating pH of a solution that is 0.15 M ammonia and 0.35 M ammonium nitrate.", "slug": "common-ion-effect"}, {"path": "khan/science/chemistry/acid-base-equilibrium/buffer-solutions/buffers-and-hendersen-hasselbalch/", "id": "LJmFbcaxDPE", "title": "Buffers and Henderson-Hasselbalch", "kind": "Video", "description": "Getting an intuitive understanding of buffers using le Chatelier's principle. Derivation of the Henderson-Hasselbalch equation.", "slug": "buffers-and-hendersen-hasselbalch"}, {"path": "khan/science/chemistry/acid-base-equilibrium/buffer-solutions/buffer-solution-calculations/", "id": "lsHq5aqz4uQ", "title": "Buffer solution pH calculations", "kind": "Video", "description": "Example of calculating the pH of a buffer solution using the Henderson-Hasselbalch equation, including the pH of the buffer solution after adding some NaOH.", "slug": "buffer-solution-calculations"}], "in_knowledge_map": false, "description": "Buffer solutions play an important role in many chemical and biological processes. In this tutorial we will learn how buffers resist changes in pH, and how to calculate the pH of a buffer solution.", "node_slug": "buffer-solutions", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/acid-base-equilibrium/buffer-solutions", "extended_slug": "science/chemistry/acid-base-equilibrium/buffer-solutions", "kind": "Topic", "slug": "buffer-solutions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/acid-base-equilibrium/titrations/", "id": "titrations", "hide": false, "title": "Titrations", "child_data": [{"kind": "Video", "id": "xf41044f4"}, {"kind": "Video", "id": "xc827ff46"}, {"kind": "Video", "id": "x884a1838"}, {"kind": "Video", "id": "x0f5bb35f"}, {"kind": "Video", "id": "xe3933619"}, {"kind": "Video", "id": "xcf6e8167"}, {"kind": "Video", "id": "xa23021eb"}, {"kind": "Video", "id": "xf9342364"}, {"kind": "Video", "id": "x394a1fa6"}, {"kind": "Video", "id": "382069"}, {"kind": "Video", "id": "6022722"}, {"kind": "Video", "id": "xcb59f5e7"}], "children": [{"path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-introduction/", "id": "d1XTOsnNlgg", "title": "Titration introduction", "kind": "Video", "description": "Introduction to acid-base titrations using example of titrating 20.0 mL of HCl of unknown concentration with 0.100 M NaOH. Covers indicators, endpoint, equivalence point, and calculating the unknown concentration.", "slug": "titration-introduction"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-calculation-example/", "id": "aj34f2Bg9Vw", "title": "Titration calculation example", "kind": "Video", "description": "Example of titrating strong acid, hydrochloric acid, with strong base barium hydroxide. How to calculate the unknown concentration when you don't have a 1:1 molar ratio of H+ to OH-.", "slug": "titration-calculation-example"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-of-a-strong-acid-with-a-strong-base/", "id": "JoGQYSTlOKo", "title": "Titration of a strong acid with a strong base", "kind": "Video", "description": "Calculating the pH before the equivalence point for titration of strong acid, hydrochloric acid, with strong base, NaOH.", "slug": "titration-of-a-strong-acid-with-a-strong-base"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-of-a-strong-acid-with-a-strong-base-continued/", "id": "HO1dsNrzE58", "title": "Titration of a strong acid with a strong base (continued)", "kind": "Video", "description": "Calculating the pH at and after the equivalence point for titration of strong acid, hydrochloric acid, with strong base, NaOH.", "slug": "titration-of-a-strong-acid-with-a-strong-base-continued"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-of-a-weak-acid-with-a-strong-base/", "id": "x3CbfUr449Y", "title": "Titration of a weak acid with a strong base", "kind": "Video", "description": "Calculating the pH for titration of acetic acid with strong base NaOH before adding any base and at half-equivalence point.", "slug": "titration-of-a-weak-acid-with-a-strong-base"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-of-a-weak-acid-with-a-strong-base-continued/", "id": "WbDL7xN-Pn0", "title": "Titration of a weak acid with a strong base (continued)", "kind": "Video", "description": "Calculating the pH for titration of acetic acid with strong base NaOH at equivalence point and past the equivalence point.", "slug": "titration-of-a-weak-acid-with-a-strong-base-continued"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-of-a-weak-base-with-a-strong-acid/", "id": "pmHlKhv7C0E", "title": "Titration of a weak base with a strong acid", "kind": "Video", "description": "Calculating the pH for titration of weak base, ammonia, with strong acid, HCl, before any HCl is added and at half-equivalence point.", "slug": "titration-of-a-weak-base-with-a-strong-acid"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-of-a-weak-base-with-a-strong-acid-continued/", "id": "kWucfgOkCIQ", "title": "Titration of a weak base with a strong acid (continued)", "kind": "Video", "description": "Calculating the pH for titration of weak base, ammonia, with strong acid, HCl, at the equivalence point and past the equivalence point.", "slug": "titration-of-a-weak-base-with-a-strong-acid-continued"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-curves-and-acid-base-indicators/", "id": "1YlXtpF-19A", "title": "Titration curves and acid-base indicators", "kind": "Video", "description": "Choosing the best indicator for different titrations depending on the pH at the equivalence point.", "slug": "titration-curves-and-acid-base-indicators"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/titration-roundup/", "id": "BBIGR0RAMtY", "title": "Titration roundup", "kind": "Video", "description": "Making sure you fully understand titration curves by comparing the initial pH and pH at equivalence point for different types.", "slug": "titration-roundup"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/acid-base-titration/", "id": "XjFNmfLv9_Q", "title": "Acid base titration example", "kind": "Video", "description": "Using acid-base titration to find mass of oxalic acid, a weak acid.", "slug": "acid-base-titration"}, {"path": "khan/science/chemistry/acid-base-equilibrium/titrations/redox-titration/", "id": "EQJf8Gb8pg4", "title": "Redox titration", "kind": "Video", "description": "A redox titration example: titrating an Fe(II) solution with potassium permanganate.", "slug": "redox-titration"}], "in_knowledge_map": false, "description": "Chemists use titrations to determine the concentration of an acid, base, or other substance in solution. We will cover the different types (strong acid/strong base, strong acid/weak base, weak acid/strong base, and redox), calculating the pH at different points of the titration, and choosing indicators.", "node_slug": "titrations", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/acid-base-equilibrium/titrations", "extended_slug": "science/chemistry/acid-base-equilibrium/titrations", "kind": "Topic", "slug": "titrations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/acid-base-equilibrium/copy-of-solubility-equilibria-mcat/", "id": "copy-of-solubility-equilibria-mcat", "hide": false, "title": "Solubility equilibria", "child_data": [{"kind": "Video", "id": "xf784347d"}, {"kind": "Video", "id": "x39678e49"}, {"kind": "Video", "id": "x17fb6c6c"}, {"kind": "Video", "id": "x9dbdb3a5"}, {"kind": "Video", "id": "x33617989"}, {"kind": "Video", "id": "x7212c366"}, {"kind": "Video", "id": "xd322f5e7"}], "children": [{"path": "khan/science/chemistry/acid-base-equilibrium/copy-of-solubility-equilibria-mcat/dissolution-and-precipitation/", "id": "g_snytB7iQ0", "title": "Dissolution and precipitation", "kind": "Video", "description": "Defining solute, solvent, hydration, dissolution, precipitation, net ionic equation, and spectator ions. Looking at the molecular level interactions between water and ions in NaCl.", "slug": "dissolution-and-precipitation"}, {"path": "khan/science/chemistry/acid-base-equilibrium/copy-of-solubility-equilibria-mcat/common-polyatomic-ions/", "id": "DpnUrVXSLaQ", "title": "Common polyatomic ions", "kind": "Video", "description": "Reviewing the common polyatomic ions, and explaining common suffixes and prefixes to help remember the formulas.", "slug": "common-polyatomic-ions"}, {"path": "khan/science/chemistry/acid-base-equilibrium/copy-of-solubility-equilibria-mcat/solubility-product-constant-from-the-solubility/", "id": "p4559dZIFco", "title": "Solubility product constant from the solubility", "kind": "Video", "description": "Introduction to solubility, molar solubility, and solubility product constant Ksp. Example of calculating the solubility of lead(II) chloride and Ksp.", "slug": "solubility-product-constant-from-the-solubility"}, {"path": "khan/science/chemistry/acid-base-equilibrium/copy-of-solubility-equilibria-mcat/solubility-from-the-solubility-product-constant/", "id": "3rkDpqp-mw0", "title": "Solubility from the solubility product constant", "kind": "Video", "description": "Calculating the solubility of copper(II) hydroxide from Ksp using an ICE table.", "slug": "solubility-from-the-solubility-product-constant"}, {"path": "khan/science/chemistry/acid-base-equilibrium/copy-of-solubility-equilibria-mcat/solubility-and-the-common-ion-effect/", "id": "pb-wsUpPuI8", "title": "Solubility and the common-ion effect", "kind": "Video", "description": "Calculating the molar solubility of lead(II) chloride in a 0.100 M solution of KCl using an ICE table.", "slug": "solubility-and-the-common-ion-effect"}, {"path": "khan/science/chemistry/acid-base-equilibrium/copy-of-solubility-equilibria-mcat/solubility-and-the-ph-of-the-solution/", "id": "RrJY9dSbRtI", "title": "Solubility and the pH of the solution", "kind": "Video", "description": "Using le Chatelier's principle to see what happens to the solubility of calcium fluoride when pH is decreased. Also looks at effect of pH on solubility equilibrium for silver chloride.", "slug": "solubility-and-the-ph-of-the-solution"}, {"path": "khan/science/chemistry/acid-base-equilibrium/copy-of-solubility-equilibria-mcat/solubility-and-complex-ion-formation/", "id": "r7gTH_5XfOI", "title": "Solubility and complex ion formation", "kind": "Video", "description": "Calculating the solubility of silver chloride in pure water and 3.0 M ammonia. Calculating new equilibrium constant to account for formation of complex ion.", "slug": "solubility-and-complex-ion-formation"}], "in_knowledge_map": false, "description": "In this tutorial we will learn how to think about the solubility and precipitation of ionic compounds in the context of chemical equilibrium. We will also look at different factors that can affect the solubility such as pH and the formation of complex ions.", "node_slug": "copy-of-solubility-equilibria-mcat", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/acid-base-equilibrium/copy-of-solubility-equilibria-mcat", "extended_slug": "science/chemistry/acid-base-equilibrium/copy-of-solubility-equilibria-mcat", "kind": "Topic", "slug": "copy-of-solubility-equilibria-mcat"}], "in_knowledge_map": false, "description": "We can combine our knowledge of acids and bases, equilibrium, and neutralization reactions to understand buffers and titrations. Solubility equilibria will build on concepts from solubility, precipitation, and equilibrium.", "node_slug": "acid-base-equilibrium", "render_type": "Topic", "topic_page_url": "/science/chemistry/acid-base-equilibrium", "extended_slug": "science/chemistry/acid-base-equilibrium", "kind": "Topic", "slug": "acid-base-equilibrium"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/thermodynamics-chemistry/", "id": "thermodynamics-chemistry", "hide": false, "title": "Thermodynamics", "child_data": [{"kind": "Topic", "id": "xad5dab12"}, {"kind": "Topic", "id": "x5b012e0a"}, {"kind": "Topic", "id": "x2c92ef2f"}, {"kind": "Topic", "id": "x653c15b3"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/thermodynamics-chemistry/internal-energy-sal/", "id": "internal-energy-sal", "hide": false, "title": "Internal energy", "child_data": [{"kind": "Video", "id": "412024"}, {"kind": "Video", "id": "374055"}, {"kind": "Video", "id": "418015"}, {"kind": "Video", "id": "375068"}, {"kind": "Video", "id": "376041"}, {"kind": "Video", "id": "424005"}], "children": [{"path": "khan/science/chemistry/thermodynamics-chemistry/internal-energy-sal/macrostates-and-microstates/", "id": "5EU-y1VF7g4", "title": "Macrostates and microstates", "kind": "Video", "description": "The difference between macrostates and microstates. Thermodynamic equilibrium.", "slug": "macrostates-and-microstates"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/internal-energy-sal/quasistatic-and-reversible-processes/", "id": "lKq-10ysDb4", "title": "Quasistatic and reversible processes", "kind": "Video", "description": "Using theoretically quasi-static and/or reversible processes to stay pretty much at equilibrium.", "slug": "quasistatic-and-reversible-processes"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/internal-energy-sal/first-law-of-thermodynamics-internal-energy/", "id": "Xb05CaG7TsQ", "title": "First law of thermodynamics / internal energy", "kind": "Video", "description": "First law of thermodynamic and Internal Energy", "slug": "first-law-of-thermodynamics-internal-energy"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/internal-energy-sal/more-on-internal-energy/", "id": "aOSlXuDO4UU", "title": "More on internal energy", "kind": "Video", "description": "Getting more intuition of internal energy, heat, and work. Examples of using the first law to calculate work.", "slug": "more-on-internal-energy"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/internal-energy-sal/work-from-expansion/", "id": "obeGVTOZyfE", "title": "Work from expansion", "kind": "Video", "description": "How a system can do work by expanding", "slug": "work-from-expansion"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/internal-energy-sal/pv-diagrams-and-expansion-work/", "id": "M5uOIy-JTmo", "title": "PV-diagrams and expansion work", "kind": "Video", "description": "Why work from expansion is the area under the curve of a PV-diagram. Why heat is not a state function and internal energy is a state function.", "slug": "pv-diagrams-and-expansion-work"}], "in_knowledge_map": false, "description": "An introduction to the first law of thermodynamics, internal energy, heat, work, and PV diagrams", "node_slug": "internal-energy-sal", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/thermodynamics-chemistry/internal-energy-sal", "extended_slug": "science/chemistry/thermodynamics-chemistry/internal-energy-sal", "kind": "Topic", "slug": "internal-energy-sal"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/thermodynamics-chemistry/enthalpy-chemistry-sal/", "id": "enthalpy-chemistry-sal", "hide": false, "title": "Enthalpy", "child_data": [{"kind": "Video", "id": "403032"}, {"kind": "Video", "id": "414006"}, {"kind": "Video", "id": "412026"}, {"kind": "Video", "id": "6022728"}], "children": [{"path": "khan/science/chemistry/thermodynamics-chemistry/enthalpy-chemistry-sal/enthalpy/", "id": "fucyI7Ouj2c", "title": "Enthalpy", "kind": "Video", "description": "Understanding why enthalpy can be viewed as \"heat content\" in a constant pressure system.", "slug": "enthalpy"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/enthalpy-chemistry-sal/heat-of-formation/", "id": "PK_JXzYcme0", "title": "Heat of formation", "kind": "Video", "description": "Standard heat of formation or standard enthalpy change of formation.", "slug": "heat-of-formation"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/enthalpy-chemistry-sal/hess-s-law-and-reaction-enthalpy-change/", "id": "chXMpDwjBDk", "title": "Hess's law and reaction enthalpy change", "kind": "Video", "description": "Using Hess's Law and standard heats of formation to determine the enthalpy change for reactions", "slug": "hess-s-law-and-reaction-enthalpy-change"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/enthalpy-chemistry-sal/hess-s-law-example/", "id": "8bCL8TQZFKo", "title": "Hess's law example", "kind": "Video", "description": "Hess's law example", "slug": "hess-s-law-example"}], "in_knowledge_map": false, "description": "An introduction to enthalpy and Hess's law", "node_slug": "enthalpy-chemistry-sal", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/thermodynamics-chemistry/enthalpy-chemistry-sal", "extended_slug": "science/chemistry/thermodynamics-chemistry/enthalpy-chemistry-sal", "kind": "Topic", "slug": "enthalpy-chemistry-sal"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/", "id": "entropy-chemistry-sal", "hide": false, "title": "Entropy", "child_data": [{"kind": "Video", "id": "391045"}, {"kind": "Video", "id": "431006"}, {"kind": "Video", "id": "426007"}, {"kind": "Video", "id": "421008"}, {"kind": "Video", "id": "379050"}, {"kind": "Video", "id": "388058"}, {"kind": "Video", "id": "397057"}, {"kind": "Video", "id": "370051"}, {"kind": "Video", "id": "371060"}], "children": [{"path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/work-done-by-isothermic-process/", "id": "iiFWoXQPOJc", "title": "Work done by isothermic process", "kind": "Video", "description": "Isothermic and adiabatic processes. Calculating the work done by an isothermic process and seeing that it is the same as the heat added.", "slug": "work-done-by-isothermic-process"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/carnot-cycle-and-carnot-engine/", "id": "aAfBSJObd6Y", "title": "Carnot cycle and Carnot engine", "kind": "Video", "description": "Introduction to the Carnot cycle and Carnot heat engine", "slug": "carnot-cycle-and-carnot-engine"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/proof-volume-ratios-in-a-carnot-cycle/", "id": "ixRtSV3CXPA", "title": "Proof: Volume ratios in a carnot cycle", "kind": "Video", "description": "Proof of the volume ratios in a Carnot Cycle", "slug": "proof-volume-ratios-in-a-carnot-cycle"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/proof-s-or-entropy-is-a-valid-state-variable/", "id": "sPz5RrFus1Q", "title": "Proof: S (or entropy) is a valid state variable", "kind": "Video", "description": "Proof that S (or entropy) is a valid state variable.", "slug": "proof-s-or-entropy-is-a-valid-state-variable"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/thermodynamic-entropy-definition-clarification/", "id": "PFcGiMLwjeY", "title": "Thermodynamic entropy definition clarification", "kind": "Video", "description": "Clarifying that the thermodynamic definition of Entropy requires a reversible system.", "slug": "thermodynamic-entropy-definition-clarification"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/reconciling-thermodynamic-and-state-definitions-of-entropy/", "id": "WLKEVfLFau4", "title": "Reconciling thermodynamic and state definitions of entropy", "kind": "Video", "description": "Long video explaining why entropy is a measure of the number of states a system can take on (mathy, but mind-blowing).", "slug": "reconciling-thermodynamic-and-state-definitions-of-entropy"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/entropy-intuition/", "id": "xJf6pHqLzs0", "title": "Entropy intuition", "kind": "Video", "description": "A discussion of what entropy is and what it isn't.", "slug": "entropy-intuition"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/maxwell-s-demon/", "id": "aKRDvSZ-igA", "title": "Maxwell's demon", "kind": "Video", "description": "Maxwell's Demon: A thought experiment that seems to defy the 2nd Law of Thermodynamics", "slug": "maxwell-s-demon"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal/more-on-entropy/", "id": "dFFzAP2OZ3E", "title": "More on entropy", "kind": "Video", "description": "More clarification as to what entropy is and what entropy is not.", "slug": "more-on-entropy"}], "in_knowledge_map": false, "description": "An introduction to the Carnot cycle and entropy", "node_slug": "entropy-chemistry-sal", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal", "extended_slug": "science/chemistry/thermodynamics-chemistry/entropy-chemistry-sal", "kind": "Topic", "slug": "entropy-chemistry-sal"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/thermodynamics-chemistry/gibbs-free-energy/", "id": "gibbs-free-energy", "hide": false, "title": "Gibbs free energy", "child_data": [{"kind": "Video", "id": "410037"}, {"kind": "Video", "id": "368056"}, {"kind": "Video", "id": "389055"}, {"kind": "Video", "id": "427003"}, {"kind": "Video", "id": "xbd98aaa4"}, {"kind": "Video", "id": "x7345ecd1"}], "children": [{"path": "khan/science/chemistry/thermodynamics-chemistry/gibbs-free-energy/gibbs-free-energy-and-spontaneity/", "id": "ViAmQivKif0", "title": "Gibbs free energy and spontaneity", "kind": "Video", "description": "Intuition behind why spontaneity is driven by enthalpy, entropy and temperature. Introduction to Gibbs free energy.", "slug": "gibbs-free-energy-and-spontaneity"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/gibbs-free-energy/gibbs-free-energy-example/", "id": "sG1ZAdYi13A", "title": "Gibbs free energy example", "kind": "Video", "description": "Determining if a reaction is spontaneous by calculating the change in Gibbs free energy. Also calculates the change in entropy using table of standard entropies.", "slug": "gibbs-free-energy-example"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/gibbs-free-energy/more-rigorous-gibbs-free-energy-spontaneity-relationship/", "id": "7aur5h44pV4", "title": "More rigorous Gibbs free energy / spontaneity relationship", "kind": "Video", "description": "More formal understanding of why a negative change in Gibbs Free Energy implies a spontaneous, irreversible reaction.", "slug": "more-rigorous-gibbs-free-energy-spontaneity-relationship"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/gibbs-free-energy/a-look-at-a-seductive-but-wrong-gibbs-spontaneity-proof/", "id": "yYbzJs6vgv8", "title": "A look at a seductive but wrong Gibbs/spontaneity proof", "kind": "Video", "description": "A look at why the \"proof\" of the relation between changes in Gibbs Free Energy and Spontaneity is wrong in many textbooks.", "slug": "a-look-at-a-seductive-but-wrong-gibbs-spontaneity-proof"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/gibbs-free-energy/changes-in-free-energy-and-the-reaction-quotient/", "id": "tB4lr5Qh3DI", "title": "Changes in free energy and the reaction quotient", "kind": "Video", "description": "The relationship between Gibbs free energy, standard Gibbs free energy, and the reaction quotient Q. Predicting the direction of the reaction when we don't have standard conditions.", "slug": "changes-in-free-energy-and-the-reaction-quotient"}, {"path": "khan/science/chemistry/thermodynamics-chemistry/gibbs-free-energy/standard-change-in-free-energy-and-the-equilibrium-constant/", "id": "U5-3wnY04gU", "title": "Standard change in free energy and the equilibrium constant", "kind": "Video", "description": "The relationship between standard Gibbs free energy change and the equilibrium constant K. Calculating K when you know the standard free energy of reaction.", "slug": "standard-change-in-free-energy-and-the-equilibrium-constant"}], "in_knowledge_map": false, "description": "An introduction to Gibbs free energy and how free energy relates to spontaneity and the equilibrium constant", "node_slug": "gibbs-free-energy", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/thermodynamics-chemistry/gibbs-free-energy", "extended_slug": "science/chemistry/thermodynamics-chemistry/gibbs-free-energy", "kind": "Topic", "slug": "gibbs-free-energy"}], "in_knowledge_map": false, "description": "Thermodynamics is the study of heat, \"thermo,\" and work, \"dynamics.\" We will be learning about energy transfer during chemical and physical changes, and how we can predict what kind of changes will occur. Concepts covered in this tutorial include the laws of thermodynamics, internal energy, heat, work, PV diagrams, enthalpy, Hess's law, entropy, and Gibbs free energy.", "node_slug": "thermodynamics-chemistry", "render_type": "Topic", "topic_page_url": "/science/chemistry/thermodynamics-chemistry", "extended_slug": "science/chemistry/thermodynamics-chemistry", "kind": "Topic", "slug": "thermodynamics-chemistry"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/oxidation-reduction/", "id": "oxidation-reduction", "hide": false, "title": "Redox reactions and electrochemistry", "child_data": [{"kind": "Topic", "id": "xea572ee7"}, {"kind": "Topic", "id": "xdc4b287b"}, {"kind": "Topic", "id": "x21041fa1"}, {"kind": "Topic", "id": "x619430eb"}, {"kind": "Topic", "id": "x896d2b16"}, {"kind": "Topic", "id": "xfefabaa8"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/", "id": "redox-oxidation-reduction", "hide": false, "title": "Oxidation-reduction reactions", "child_data": [{"kind": "Video", "id": "xab426f28"}, {"kind": "Video", "id": "xaa3058b4"}, {"kind": "Video", "id": "xb1e95617"}, {"kind": "Video", "id": "x16367aa8"}, {"kind": "Video", "id": "x607996cf"}, {"kind": "Video", "id": "x9917db3a"}, {"kind": "Video", "id": "xce6506c6"}, {"kind": "Video", "id": "x528f68ef"}, {"kind": "Video", "id": "x7e2a500f"}, {"kind": "Video", "id": "x1cd3b06b"}, {"kind": "Video", "id": "xcb59f5e7"}], "children": [{"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/introduction-to-oxidation-and-reduction/", "id": "DvYs1HILq1g", "title": "Oxidation and reduction", "kind": "Video", "description": "Introducing oxidation states, oxidation, and reduction. Some tips for remembering oxidation and reduction.", "slug": "introduction-to-oxidation-and-reduction"}, {"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/oxidation-state-trends-in-periodic-table/", "id": "CCsNJFsYSGs", "title": "Oxidation state trends in periodic table", "kind": "Video", "description": "Trends in common oxidation states for main group elements.", "slug": "oxidation-state-trends-in-periodic-table"}, {"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/practice-determining-oxidation-states/", "id": "M7PnxSQedkM", "title": "Practice determining oxidation states", "kind": "Video", "description": "Determining oxidation numbers in magnesium oxide and magnesium hydroxide.", "slug": "practice-determining-oxidation-states"}, {"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/unusual-oxygen-oxidation-states/", "id": "R2EtXOoIU-E", "title": "Unusual oxygen oxidation states", "kind": "Video", "description": "Determining oxidation numbers in hydrogen peroxide and oxygen difluoride.", "slug": "unusual-oxygen-oxidation-states"}, {"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/oxidation-reduction-or-redox-reactions/", "id": "OE0MMIyMTNU", "title": "Introduction to redox reactions", "kind": "Video", "description": "Finding the half reactions in a combustion reaction, and identifying what is getting oxidized and reduced.", "slug": "oxidation-reduction-or-redox-reactions"}, {"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/redox-reaction-with-iron/", "id": "n30yILpUitw", "title": "Redox reaction with iron", "kind": "Video", "description": "For the reaction between Fe and HCl, identifying the half reactions and what is getting oxidized and reduced.", "slug": "redox-reaction-with-iron"}, {"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/oxidizing-and-reducing-agents-1/", "id": "TOdHMORp4is", "title": "Oxidizing and reducing agents", "kind": "Video", "description": "How to identify the oxidizing and reducing agents.", "slug": "oxidizing-and-reducing-agents-1"}, {"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/disproportionation/", "id": "PXlvKtpvUEk", "title": "Disproportionation", "kind": "Video", "description": "Assigning oxidation states for the decomposition of hydrogen peroxide, a disproportionation reaction.", "slug": "disproportionation"}, {"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/balance-and-redox-reactions1/", "id": "4tLrbMstfm8", "title": "Balancing redox reactions in acid", "kind": "Video", "description": "How to balance a redox reaction in acid.", "slug": "balance-and-redox-reactions1"}, {"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/balancing-redox-reactions1/", "id": "Vjs8uK2ovQE", "title": "Balancing redox reactions in base", "kind": "Video", "description": "How to balance a redox reaction in base.", "slug": "balancing-redox-reactions1"}, {"path": "khan/science/chemistry/oxidation-reduction/redox-oxidation-reduction/redox-titration/", "id": "EQJf8Gb8pg4", "title": "Redox titration", "kind": "Video", "description": "A redox titration example: titrating an Fe(II) solution with potassium permanganate.", "slug": "redox-titration"}], "in_knowledge_map": false, "description": "Oxidation and reduction are powerful ideas for thinking about how charge is transferred within a reaction. As we'll see, it is something of a hypothetical, but it is, nonetheless, very useful.", "node_slug": "redox-oxidation-reduction", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/oxidation-reduction/redox-oxidation-reduction", "extended_slug": "science/chemistry/oxidation-reduction/redox-oxidation-reduction", "kind": "Topic", "slug": "redox-oxidation-reduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell/", "id": "batter-galvanic-voltaic-cell", "hide": false, "title": "Galvanic cells", "child_data": [{"kind": "Video", "id": "xfc2d5f2d"}, {"kind": "Video", "id": "xe7416dc9"}, {"kind": "Video", "id": "x1773beb6"}, {"kind": "Video", "id": "x13a28207"}, {"kind": "Video", "id": "x51f5d849"}, {"kind": "Video", "id": "xc191ac11"}], "children": [{"path": "khan/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell/redox-reaction-from-dissolving-zinc-in-copper-sulfate/", "id": "wVMe8ZmCZo0", "title": "Redox reaction from dissolving zinc in copper sulfate", "kind": "Video", "description": "What happens when you add zinc to a solution of copper sulfate? Identifying the half reactions to see what got oxidized and reduced.", "slug": "redox-reaction-from-dissolving-zinc-in-copper-sulfate"}, {"path": "khan/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell/galvanic-cell-voltaic-cell/", "id": "9Xncz_mMc5g", "title": "Introduction to galvanic/voltaic cells", "kind": "Video", "description": "How to use a redox reaction to construct a galvanic/voltaic cell to produce a flow of current.. Shows the flow of electrons and ions, and explains the role of the salt bridge.", "slug": "galvanic-cell-voltaic-cell"}, {"path": "khan/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell/electrodes-and-voltage-of-galvanic-cell/", "id": "m0SFJt_0v28", "title": "Electrodes and voltage of Galvanic cell", "kind": "Video", "description": "Identifying the anode and cathode in a galvanic cell, and calculating the voltage using standard electrode potentials.", "slug": "electrodes-and-voltage-of-galvanic-cell"}, {"path": "khan/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell/shorthand-notation-for-galvanicvoltaic-cells/", "id": "xHuLZHasldg", "title": "Shorthand notation for galvanic/voltaic cells", "kind": "Video", "description": "How to describe cell using shorthand notation.", "slug": "shorthand-notation-for-galvanicvoltaic-cells"}, {"path": "khan/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell/lead-storage-battery/", "id": "PQ48N5jaG2w", "title": "Lead storage battery", "kind": "Video", "description": "Balancing the redox reaction (in acid) that occurs in a lead storage battery.", "slug": "lead-storage-battery"}, {"path": "khan/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell/nickel-cadmium-battery/", "id": "tUvpwdqdLlI", "title": "Nickel-cadmium battery", "kind": "Video", "description": "Balancing the redox reaction (in base) that occurs in a nickel-cadmium battery.", "slug": "nickel-cadmium-battery"}], "in_knowledge_map": false, "description": "Batteries power much of our lives (literally). In this tutorial, we'll use our knowledge of oxidation and reduction to understand how Galvanic/Voltaic cells actually work.", "node_slug": "batter-galvanic-voltaic-cell", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell", "extended_slug": "science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell", "kind": "Topic", "slug": "batter-galvanic-voltaic-cell"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/oxidation-reduction/cell-potential/", "id": "cell-potential", "hide": false, "title": "Standard cell potentials", "child_data": [{"kind": "Video", "id": "x9f0707ce"}, {"kind": "Video", "id": "xa118949b"}, {"kind": "Video", "id": "xda15e076"}, {"kind": "Video", "id": "x1c447583"}], "children": [{"path": "khan/science/chemistry/oxidation-reduction/cell-potential/standard-reduction-potentials/", "id": "oAOq55MPJpM", "title": "Standard reduction potentials", "kind": "Video", "description": "How to use a table of standard reduction potentials to calculate standard cell potential. Identifying trends in oxidizing and reducing agent strength.", "slug": "standard-reduction-potentials"}, {"path": "khan/science/chemistry/oxidation-reduction/cell-potential/using-reduction-potentials/", "id": "79OmpES_9OE", "title": "Using reduction potentials", "kind": "Video", "description": "Example of using table of standard reduction potentials to calculate standard cell potential.", "slug": "using-reduction-potentials"}, {"path": "khan/science/chemistry/oxidation-reduction/cell-potential/voltage-as-an-intensive-property/", "id": "xsSLvlonxs4", "title": "Voltage as an intensive property", "kind": "Video", "slug": "voltage-as-an-intensive-property"}, {"path": "khan/science/chemistry/oxidation-reduction/cell-potential/spontaneity-and-redox-reactions/", "id": "sorB6XFJ8Jc", "title": "Spontaneity and redox reactions", "kind": "Video", "description": "Using standard cell potential to predict whether a redox reaction will be spontaneous under standard conditions.", "slug": "spontaneity-and-redox-reactions"}], "in_knowledge_map": false, "description": "An introduction to calculating cell potentials at standard state.", "node_slug": "cell-potential", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/oxidation-reduction/cell-potential", "extended_slug": "science/chemistry/oxidation-reduction/cell-potential", "kind": "Topic", "slug": "cell-potential"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/oxidation-reduction/electrochemistry-thermodynamics-and-equilibrium/", "id": "electrochemistry-thermodynamics-and-equilibrium", "hide": false, "title": "Electrochemistry, thermodynamics, and equilibrium", "child_data": [{"kind": "Video", "id": "xf918ece2"}, {"kind": "Video", "id": "x4f2f97b8"}, {"kind": "Video", "id": "x0a77eceb"}], "children": [{"path": "khan/science/chemistry/oxidation-reduction/electrochemistry-thermodynamics-and-equilibrium/free-energy-and-cell-potential/", "id": "4tcLzVJdxZs", "title": "Free energy and cell potential", "kind": "Video", "description": "Relationship between Gibbs free energy and standard cell potential.", "slug": "free-energy-and-cell-potential"}, {"path": "khan/science/chemistry/oxidation-reduction/electrochemistry-thermodynamics-and-equilibrium/standard-cell-potential-and-the-equilibrium-constant/", "id": "CdE1Sa18gIo", "title": "Standard cell potential and the equilibrium constant", "kind": "Video", "description": "Finding the relationship between standard cell potential and equilibrium constant K.", "slug": "standard-cell-potential-and-the-equilibrium-constant"}, {"path": "khan/science/chemistry/oxidation-reduction/electrochemistry-thermodynamics-and-equilibrium/calculating-the-equilibrium-constant-from-the-standard-cell-potential/", "id": "kxNaVzQ07yc", "title": "Calculating the equilibrium constant from the standard cell potential", "kind": "Video", "description": "Example problem for calculating the equilibrium constant K using the standard cell potential.", "slug": "calculating-the-equilibrium-constant-from-the-standard-cell-potential"}], "in_knowledge_map": false, "description": "Relating the cell potential to the equilibrium constant K and Gibbs free energy.", "node_slug": "electrochemistry-thermodynamics-and-equilibrium", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/oxidation-reduction/electrochemistry-thermodynamics-and-equilibrium", "extended_slug": "science/chemistry/oxidation-reduction/electrochemistry-thermodynamics-and-equilibrium", "kind": "Topic", "slug": "electrochemistry-thermodynamics-and-equilibrium"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/oxidation-reduction/cell-potentials-under-nonstandard-conditions/", "id": "cell-potentials-under-nonstandard-conditions", "hide": false, "title": "Cell potentials under nonstandard conditions", "child_data": [{"kind": "Video", "id": "x0c9df053"}, {"kind": "Video", "id": "xac7a2c03"}, {"kind": "Video", "id": "x0442f790"}, {"kind": "Video", "id": "x2c135e90"}], "children": [{"path": "khan/science/chemistry/oxidation-reduction/cell-potentials-under-nonstandard-conditions/galvanic-cells-and-changes-in-free-energy/", "id": "TYFAJHx5LFA", "title": "Galvanic cells and changes in free energy", "kind": "Video", "description": "Relationship between Gibbs free energy, reaction quotient Q, and cell voltage.", "slug": "galvanic-cells-and-changes-in-free-energy"}, {"path": "khan/science/chemistry/oxidation-reduction/cell-potentials-under-nonstandard-conditions/nernst-equation/", "id": "QaOtsYouet0", "title": "Nernst equation", "kind": "Video", "description": "Deriving a few different forms of the Nernst equation, the relationship between Gibbs free energy and reaction quotient Q.", "slug": "nernst-equation"}, {"path": "khan/science/chemistry/oxidation-reduction/cell-potentials-under-nonstandard-conditions/using-the-nernst-equation/", "id": "WqsJNtBEKtg", "title": "Using the Nernst equation", "kind": "Video", "description": "Using the Nernst equation to calculate the cell potential when concentrations are not standard conditions.", "slug": "using-the-nernst-equation"}, {"path": "khan/science/chemistry/oxidation-reduction/cell-potentials-under-nonstandard-conditions/concentration-cell/", "id": "mMzbr5rm4j8", "title": "Concentration cell", "kind": "Video", "description": "Using the Nernst equation to calculate cell potential for a concentration cell.", "slug": "concentration-cell"}], "in_knowledge_map": false, "description": "Calculating the cell potential when operating at nonstandard conditions.", "node_slug": "cell-potentials-under-nonstandard-conditions", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/oxidation-reduction/cell-potentials-under-nonstandard-conditions", "extended_slug": "science/chemistry/oxidation-reduction/cell-potentials-under-nonstandard-conditions", "kind": "Topic", "slug": "cell-potentials-under-nonstandard-conditions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/oxidation-reduction/electrolytic-cell/", "id": "electrolytic-cell", "hide": false, "title": "Electrolytic cells and electrolysis", "child_data": [{"kind": "Video", "id": "x35034377"}, {"kind": "Video", "id": "x37e22dab"}, {"kind": "Video", "id": "xdf4ac844"}], "children": [{"path": "khan/science/chemistry/oxidation-reduction/electrolytic-cell/introduction-to-electrolysis/", "id": "1tvvSUySfls", "title": "Introduction to electrolysis", "kind": "Video", "description": "Comparing a voltaic cell to an electrolytic cell.", "slug": "introduction-to-electrolysis"}, {"path": "khan/science/chemistry/oxidation-reduction/electrolytic-cell/quantitative-electrolysis/", "id": "QEUsZeKYsgo", "title": "Quantitative electrolysis", "kind": "Video", "description": "Calculating how much zinc deposits on the zinc electrode after 1.0 h when a current of 5.0 A is applied to the battery.", "slug": "quantitative-electrolysis"}, {"path": "khan/science/chemistry/oxidation-reduction/electrolytic-cell/electrolysis-of-molten-sodium-chloride/", "id": "Q9BtOLDr0vg", "title": "Electrolysis of molten sodium chloride", "kind": "Video", "description": "Example quantitative electrolysis problem using molten sodium chloride.", "slug": "electrolysis-of-molten-sodium-chloride"}], "in_knowledge_map": false, "description": "An introduction to electrolytic cells and electrolysis", "node_slug": "electrolytic-cell", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/oxidation-reduction/electrolytic-cell", "extended_slug": "science/chemistry/oxidation-reduction/electrolytic-cell", "kind": "Topic", "slug": "electrolytic-cell"}], "in_knowledge_map": false, "description": "Oxidation and reduction reactions power your phone and make it possible for your body to use the oxygen you inhale. We will learn about oxidation states (numbers), oxidation-reduction (redox) reactions, galvanic/voltaic cells, electrolytic cells, cell potentials, and how electrochemistry is related to thermodynamics and equilibrium.", "node_slug": "oxidation-reduction", "render_type": "Topic", "topic_page_url": "/science/chemistry/oxidation-reduction", "extended_slug": "science/chemistry/oxidation-reduction", "kind": "Topic", "slug": "oxidation-reduction"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/chem-kinetics/", "id": "chem-kinetics", "hide": false, "title": "Kinetics", "child_data": [{"kind": "Topic", "id": "xd62c9e8c"}, {"kind": "Topic", "id": "x38f1c5b2"}, {"kind": "Topic", "id": "xf00e3da7"}, {"kind": "Topic", "id": "x4b489de0"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chem-kinetics/reaction-rates/", "id": "reaction-rates", "hide": false, "title": "Reaction rates and rate laws", "child_data": [{"kind": "Video", "id": "414004"}, {"kind": "Video", "id": "x3d400008"}, {"kind": "Video", "id": "xba36c390"}, {"kind": "Video", "id": "xa3c0f3cf"}], "children": [{"path": "khan/science/chemistry/chem-kinetics/reaction-rates/introduction-to-kinetics/", "id": "__zy-oOLPug", "title": "Introduction to kinetics", "kind": "Video", "description": "Kinetics, activation energy, activated complex and catalysts.", "slug": "introduction-to-kinetics"}, {"path": "khan/science/chemistry/chem-kinetics/reaction-rates/rate-of-reaction/", "id": "8wIodo1HD4Y", "title": "Rate of reaction", "kind": "Video", "description": "Definition of reaction rate, and examples of calculating the average rate of reaction.", "slug": "rate-of-reaction"}, {"path": "khan/science/chemistry/chem-kinetics/reaction-rates/rate-law-and-reaction-order/", "id": "6Ng8ayarWHw", "title": "Rate law and reaction order", "kind": "Video", "description": "Using method of initial rates to determine the order of a reaction.", "slug": "rate-law-and-reaction-order"}, {"path": "khan/science/chemistry/chem-kinetics/reaction-rates/experimental-determination-of-rate-laws/", "id": "Ad0aaYixFJg", "title": "Experimental determination of rate laws", "kind": "Video", "description": "Example using initial rates to find the order in each reactant, the overall order, and the rate constant k.", "slug": "experimental-determination-of-rate-laws"}], "in_knowledge_map": false, "description": "In this tutorial, we will examine the rates of chemical reactions and learn how to write rate laws.", "node_slug": "reaction-rates", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chem-kinetics/reaction-rates", "extended_slug": "science/chemistry/chem-kinetics/reaction-rates", "kind": "Topic", "slug": "reaction-rates"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/", "id": "copy-of-kinetics", "hide": false, "title": "Relationship between reaction concentrations and time", "child_data": [{"kind": "Video", "id": "x6e4aa8e2"}, {"kind": "Video", "id": "x2fe55283"}, {"kind": "Video", "id": "xfce7e24d"}, {"kind": "Video", "id": "423007"}, {"kind": "Video", "id": "xf66a9476"}, {"kind": "Video", "id": "xde3bccae"}, {"kind": "Video", "id": "xc6f74be3"}, {"kind": "Video", "id": "x1d7ae02d"}, {"kind": "Video", "id": "x2a1eac00"}, {"kind": "Video", "id": "xa0344f0e"}], "children": [{"path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/first-order-reaction-with-calculus/", "id": "Bt0mz4mGddk", "title": "First-order reaction (with calculus)", "kind": "Video", "description": "Deriving the integrated rate law for first-order reactions using calculus. How you can graph first-order rate data to see a linear relationship.", "slug": "first-order-reaction-with-calculus"}, {"path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/plotting-data-for-a-first-order-reaction/", "id": "vN7O7zsRKb8", "title": "Plotting data for a first-order reaction", "kind": "Video", "description": "Example of graphing first-order rate data to see a linear relationship, and calculating rate constant k from the slope.", "slug": "plotting-data-for-a-first-order-reaction"}, {"path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/half-life-of-a-first-order-reaction/", "id": "e4qci9b2d3U", "title": "Half-life of a first-order reaction", "kind": "Video", "description": "Deriving half-life equation of a first-order reaction starting from the integrated rate law.", "slug": "half-life-of-a-first-order-reaction"}, {"path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/half-life/", "id": "9REPnibO4IQ", "title": "Half-life and carbon dating", "kind": "Video", "description": "Carbon dating is a real-life example of a first-order reaction. This video explains\u00a0half-life in the context of radioactive decay.", "slug": "half-life"}, {"path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/first-order-reaction-example/", "id": "fCdT2z0JcU8", "title": "First-order reaction example", "kind": "Video", "description": "Example of using the integrated rate law to solve for time and concentration, and calculating the half life for a first-order reaction.", "slug": "first-order-reaction-example"}, {"path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/second-order-reaction-with-calculus/", "id": "BRVPlDCMgMg", "title": "Second-order reaction (with calculus)", "kind": "Video", "description": "Deriving the integrated rate law for second order reactions using calculus. How you can graph second order rate data to see a linear relationship.", "slug": "second-order-reaction-with-calculus"}, {"path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/plotting-data-for-a-second-order-reaction/", "id": "eajQ4ZY2r-U", "title": "Plotting data for a second-order reaction", "kind": "Video", "description": "Example of graphing second order rate data to see a linear relationship, and calculating rate constant k from the slope.", "slug": "plotting-data-for-a-second-order-reaction"}, {"path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/half-life-of-a-second-order-reaction/", "id": "XUmB0reCB-U", "title": "Half-life of a second-order reaction", "kind": "Video", "description": "Deriving half-life equation of a second-order reaction starting from the integrated rate law.", "slug": "half-life-of-a-second-order-reaction"}, {"path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/second-order-reaction-example/", "id": "OmWyMLucEbE", "title": "Second-order reaction example", "kind": "Video", "description": "Example of using integrated rate law to solve for concentration, and calculating the half life for a second-order reaction.", "slug": "second-order-reaction-example"}, {"path": "khan/science/chemistry/chem-kinetics/copy-of-kinetics/zero-order-reaction-with-calculus/", "id": "49LcF9Zf9TI", "title": "Zero-order reaction (with calculus)", "kind": "Video", "description": "Deriving the integrated rate law for zeroth order reactions using calculus. How you can graph zero order rate data to see a linear relationship.", "slug": "zero-order-reaction-with-calculus"}], "in_knowledge_map": false, "description": "In this tutorial, we will convert rate laws into equations that allow us to determine the concentrations of reactants at any time during the course of a reaction.", "node_slug": "copy-of-kinetics", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chem-kinetics/copy-of-kinetics", "extended_slug": "science/chemistry/chem-kinetics/copy-of-kinetics", "kind": "Topic", "slug": "copy-of-kinetics"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chem-kinetics/arrhenius-equation/", "id": "arrhenius-equation", "hide": false, "title": "Arrhenius equation and reaction mechanisms", "child_data": [{"kind": "Video", "id": "x192cb86f"}, {"kind": "Video", "id": "x81933fd6"}, {"kind": "Video", "id": "x71322e6f"}, {"kind": "Video", "id": "x260a2638"}, {"kind": "Video", "id": "x7abce25c"}, {"kind": "Video", "id": "xde3ff69d"}, {"kind": "Video", "id": "x3f370583"}, {"kind": "Video", "id": "x3d4766d5"}], "children": [{"path": "khan/science/chemistry/chem-kinetics/arrhenius-equation/collision-theory/", "id": "1iAxhc6EflI", "title": "Collision theory", "kind": "Video", "description": "An introduction to collision theory and activation energy.", "slug": "collision-theory"}, {"path": "khan/science/chemistry/chem-kinetics/arrhenius-equation/arrhenius-equation/", "id": "zjhepBLtqug", "title": "Arrhenius equation", "kind": "Video", "slug": "arrhenius-equation"}, {"path": "khan/science/chemistry/chem-kinetics/arrhenius-equation/forms-of-the-arrhenius-equation/", "id": "J0ndBMMQW20", "title": "Forms of the Arrhenius equation", "kind": "Video", "description": "How to write different forms of the Arrhenius equation. Using the Arrhenius equation to look at how changing temperature and activation energy affects collisions.", "slug": "forms-of-the-arrhenius-equation"}, {"path": "khan/science/chemistry/chem-kinetics/arrhenius-equation/using-the-arrhenius-equation/", "id": "aIvYdSzLGoI", "title": "Using the Arrhenius equation", "kind": "Video", "description": "How to use the Arrhenius equation to calculate the activation energy.", "slug": "using-the-arrhenius-equation"}, {"path": "khan/science/chemistry/chem-kinetics/arrhenius-equation/maxwell-boltzmann-distribution/", "id": "xQ9D4Jz95-A", "title": "Maxwell Boltzmann distribution", "kind": "Video", "description": "Using the Maxwell-Boltzmann distribution to visualize the distribution of speeds of particles at different temperatures.", "slug": "maxwell-boltzmann-distribution"}, {"path": "khan/science/chemistry/chem-kinetics/arrhenius-equation/elementary-rate-laws/", "id": "vIZ0LnLo3jE", "title": "Elementary rate laws", "kind": "Video", "description": "How to write rate laws for elementary reactions.", "slug": "elementary-rate-laws"}, {"path": "khan/science/chemistry/chem-kinetics/arrhenius-equation/mechanisms-and-the-rate-determining-step/", "id": "ShzW1LoQgoc", "title": "Mechanisms and the rate-determining step", "kind": "Video", "description": "An introduction to mechanisms and the rate determining step. Example of finding rate law of multistep reaction with initial slow step.", "slug": "mechanisms-and-the-rate-determining-step"}, {"path": "khan/science/chemistry/chem-kinetics/arrhenius-equation/catalysts/", "id": "if5JGssffm8", "title": "Catalysts", "kind": "Video", "description": "How a catalyst speeds up a reaction by lowering the activation energy.", "slug": "catalysts"}], "in_knowledge_map": false, "description": "In this tutorial, we will learn about reaction mechanisms and how temperature and the activation energy affect the rate of a reaction.", "node_slug": "arrhenius-equation", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chem-kinetics/arrhenius-equation", "extended_slug": "science/chemistry/chem-kinetics/arrhenius-equation", "kind": "Topic", "slug": "arrhenius-equation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/chem-kinetics/spectrophotometry-tutorial/", "id": "spectrophotometry-tutorial", "hide": false, "title": "Spectrophotometry", "child_data": [{"kind": "Video", "id": "6022723"}, {"kind": "Video", "id": "6022724"}], "children": [{"path": "khan/science/chemistry/chem-kinetics/spectrophotometry-tutorial/spectrophotometry-introduction/", "id": "qbCZbP6_j48", "title": "Spectrophotometry introduction", "kind": "Video", "description": "Spectrophotometry, transmittance, absorbance and the Beer-Lambert Law", "slug": "spectrophotometry-introduction"}, {"path": "khan/science/chemistry/chem-kinetics/spectrophotometry-tutorial/spectrophotometry-example/", "id": "VqAa_cmZ7OY", "title": "Spectrophotometry example", "kind": "Video", "description": "Spectrophotometry Example - determining concentration based on absorbance", "slug": "spectrophotometry-example"}], "in_knowledge_map": false, "description": "In the lab, it is useful to know how much of something you have or the concentration of a solute. In this tutorial, we'll light to do that!", "node_slug": "spectrophotometry-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/chem-kinetics/spectrophotometry-tutorial", "extended_slug": "science/chemistry/chem-kinetics/spectrophotometry-tutorial", "kind": "Topic", "slug": "spectrophotometry-tutorial"}], "in_knowledge_map": false, "description": "Chemists are often interested in how fast a reaction will occur, and what we can do to control the rate. The study of reaction rates is called kinetics, and we will learn about average reaction rate, rate laws, the Arrhenius equation, reaction mechanisms, catalysts, and spectrophotometry.", "node_slug": "chem-kinetics", "render_type": "Topic", "topic_page_url": "/science/chemistry/chem-kinetics", "extended_slug": "science/chemistry/chem-kinetics", "kind": "Topic", "slug": "chem-kinetics"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/chemistry/nuclear-chemistry/", "id": "nuclear-chemistry", "hide": false, "title": "Nuclear chemistry", "child_data": [{"kind": "Topic", "id": "xf2aa6ecc"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/", "id": "radioactive-decay", "hide": false, "title": "Radioactive decay", "child_data": [{"kind": "Video", "id": "x045926af"}, {"kind": "Video", "id": "x9722cb54"}, {"kind": "Video", "id": "406026"}, {"kind": "Video", "id": "x8f704f5f"}, {"kind": "Video", "id": "423007"}, {"kind": "Video", "id": "xb514d30c"}, {"kind": "Video", "id": "375067"}, {"kind": "Video", "id": "391044"}, {"kind": "Video", "id": "368055"}, {"kind": "Video", "id": "x9cb7fbc5"}], "children": [{"path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/mass-defect-and-binding-energy/", "id": "9b8qZ6OHZ5s", "title": "Mass defect and binding energy", "kind": "Video", "description": "Using the mass defect to calculate the energy released when a helium nucleus formed. Introduction to the nuclear strong force.", "slug": "mass-defect-and-binding-energy"}, {"path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/nuclear-stability-and-nuclear-equasions/", "id": "gqrh8wbPXVE", "title": "Nuclear stability and nuclear equations", "kind": "Video", "description": "Using the ratio of neutrons to protons to figure out of a nucleus will be stable or radioactive.", "slug": "nuclear-stability-and-nuclear-equasions"}, {"path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/types-of-decay/", "id": "3koOwozY4oc", "title": "Types of decay", "kind": "Video", "description": "Alpha, Beta, Gamma Decay and Positron Emission", "slug": "types-of-decay"}, {"path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/alpha-beta-and-gamma-decay/", "id": "mzLOT6uOfO4", "title": "Writing nuclear equations for alpha, beta, and gamma decay", "kind": "Video", "description": "Writing nuclear equations for alpha, beta, and gamma decay.", "slug": "alpha-beta-and-gamma-decay"}, {"path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/half-life/", "id": "9REPnibO4IQ", "title": "Half-life and carbon dating", "kind": "Video", "description": "Carbon dating is a real-life example of a first-order reaction. This video explains\u00a0half-life in the context of radioactive decay.", "slug": "half-life"}, {"path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/half-life-of-radioactive-isotopes/", "id": "dnYyMHSSb8M", "title": "Half-life plot", "kind": "Video", "description": "Definition of half-life and graphing the decay of phosphorus-32. Calculating how much phosphorus-32 remains after 57.2 days.", "slug": "half-life-of-radioactive-isotopes"}, {"path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/exponential-decay-formula-proof-can-skip-involves-calculus/", "id": "H7nrVDV8ahc", "title": "Exponential decay formula proof (can skip, involves calculus)", "kind": "Video", "description": "Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class.", "slug": "exponential-decay-formula-proof-can-skip-involves-calculus"}, {"path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/introduction-to-exponential-decay/", "id": "HTDop6eEsaA", "title": "Introduction to exponential decay", "kind": "Video", "description": "Introduction to Exponential Decay. Using the exponential decay formula to calculate k, calculating the mass of carbon-14 remaining after a given time, and calculating the time it takes to have a specific mass remaining .", "slug": "introduction-to-exponential-decay"}, {"path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/more-exponential-decay-examples/", "id": "Hqzakjo_dYg", "title": "More exponential decay examples", "kind": "Video", "description": "A few more examples of exponential decay. Practice calculating k from half-life, and calculating initial mass.", "slug": "more-exponential-decay-examples"}, {"path": "khan/science/chemistry/nuclear-chemistry/radioactive-decay/exponential-decay-and-semi-log-plots/", "id": "vnNlvnnBX0I", "title": "Exponential decay and semi-log plots", "kind": "Video", "description": "Using exponential decay equation to solve for relationship between k and half-life. Using semi-log plot to get graph of a straight line with slope of -k.", "slug": "exponential-decay-and-semi-log-plots"}], "in_knowledge_map": false, "description": "", "node_slug": "radioactive-decay", "render_type": "Tutorial", "topic_page_url": "/science/chemistry/nuclear-chemistry/radioactive-decay", "extended_slug": "science/chemistry/nuclear-chemistry/radioactive-decay", "kind": "Topic", "slug": "radioactive-decay"}], "in_knowledge_map": false, "description": "Nuclear chemistry and radioactivity can treat cancer and make your watch glow in the dark. We will learn about radioactive decay, nuclear stability, carbon dating, half-life, and what is happening on a subatomic level during a nuclear reaction.", "node_slug": "nuclear-chemistry", "render_type": "Topic", "topic_page_url": "/science/chemistry/nuclear-chemistry", "extended_slug": "science/chemistry/nuclear-chemistry", "kind": "Topic", "slug": "nuclear-chemistry"}], "in_knowledge_map": false, "description": "Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.", "node_slug": "chemistry", "render_type": "Subject", "topic_page_url": "/science/chemistry", "extended_slug": "science/chemistry", "kind": "Topic", "slug": "chemistry"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/", "id": "organic-chemistry", "hide": false, "title": "Organic chemistry", "child_data": [{"kind": "Topic", "id": "x05fcddcb"}, {"kind": "Topic", "id": "xb32d9a90"}, {"kind": "Topic", "id": "x84cadce3"}, {"kind": "Topic", "id": "xf2909c8a"}, {"kind": "Topic", "id": "x00b805dc"}, {"kind": "Topic", "id": "x53149848"}, {"kind": "Topic", "id": "xa3d20bbd"}, {"kind": "Topic", "id": "x6b80168b"}, {"kind": "Topic", "id": "xa5a6b96a"}, {"kind": "Topic", "id": "x550a9280"}, {"kind": "Topic", "id": "xc8b79fc3"}, {"kind": "Topic", "id": "xc048e3d5"}, {"kind": "Topic", "id": "x56be16f4"}, {"kind": "Topic", "id": "x8adbb6ac"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/gen-chem-review/", "id": "gen-chem-review", "hide": false, "title": "Structure and bonding", "child_data": [{"kind": "Topic", "id": "xcef4894d"}, {"kind": "Topic", "id": "x889db602"}, {"kind": "Topic", "id": "xdca2f3a5"}, {"kind": "Topic", "id": "x4ed56196"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/gen-chem-review/dot-strcutures-jay/", "id": "dot-strcutures-jay", "hide": false, "title": "Dot structures", "child_data": [{"kind": "Video", "id": "1288848684"}, {"kind": "Video", "id": "1288839972"}], "children": [{"path": "khan/science/organic-chemistry/gen-chem-review/dot-strcutures-jay/dot-structures-i-single-bonds-1/", "id": "BIZNBfBuu1w", "title": "Dot structures I: Single bonds", "kind": "Video", "slug": "dot-structures-i-single-bonds-1"}, {"path": "khan/science/organic-chemistry/gen-chem-review/dot-strcutures-jay/dot-structures-ii-multiple-bonds-1/", "id": "WLGTx6sSIOc", "title": "Dot structures II: Multiple bonds", "kind": "Video", "slug": "dot-structures-ii-multiple-bonds-1"}], "in_knowledge_map": false, "description": "Going dotty trying to review? Don't worry about a single thing - or multiples for that matter! Get some points on simple organic dot structures in this tutorial.", "node_slug": "dot-strcutures-jay", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/gen-chem-review/dot-strcutures-jay", "extended_slug": "science/organic-chemistry/gen-chem-review/dot-strcutures-jay", "kind": "Topic", "slug": "dot-strcutures-jay"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/", "id": "hybrid-orbitals-jay", "hide": false, "title": "Hybridization", "child_data": [{"kind": "Video", "id": "2600611"}, {"kind": "Video", "id": "2600612"}, {"kind": "Video", "id": "x67a13ebc"}, {"kind": "Video", "id": "x0213e20b"}, {"kind": "Video", "id": "x3f29bc33"}, {"kind": "Video", "id": "x3fb4948a"}, {"kind": "Video", "id": "xafb6fb15"}, {"kind": "Video", "id": "1262226504"}], "children": [{"path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/sp3-hybridized-orbitals-and-sigma-bonds/", "id": "u1eGSL6J6Fo", "title": "sp3 hybridized orbitals and sigma bonds", "kind": "Video", "description": "sp3 Hybridized Orbitals and Sigma Bonds", "slug": "sp3-hybridized-orbitals-and-sigma-bonds"}, {"path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/pi-bonds-and-sp2-hybridized-orbitals/", "id": "lJX8DxoPRfk", "title": "Pi bonds and sp2 hybridized orbitals", "kind": "Video", "description": "Pi bonds and sp2 Hybridized Orbitals", "slug": "pi-bonds-and-sp2-hybridized-orbitals"}, {"path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/sp3-hybrid-orbital-jay-final/", "id": "JHgTNNX01r4", "title": "Sp3 hybridization", "kind": "Video", "description": "Sp3 hybrid orbitals and properties of sigma bonds.", "slug": "sp3-hybrid-orbital-jay-final"}, {"path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/steric-number-sp3-hybridization/", "id": "BM-My1AheLw", "title": "Steric number and sp3 hybridization", "kind": "Video", "description": "Using steric number to calculate number of hybrid orbitals.", "slug": "steric-number-sp3-hybridization"}, {"path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/sp2-hybridization-jay-final/", "id": "ROzkyTgscGg", "title": "Sp2 hybridization", "kind": "Video", "description": "Sp2 hybrid orbitals and properties of pi bonds.", "slug": "sp2-hybridization-jay-final"}, {"path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/sp-hybridization-jay-final/", "id": "BRHfy7envyQ", "title": "Sp hybridization", "kind": "Video", "description": "Sp hybrid orbitals and properties of triple bonds.", "slug": "sp-hybridization-jay-final"}, {"path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/organic-hybridization-practice/", "id": "GuaozMpFS3w", "title": "Organic hybridization practice", "kind": "Video", "description": "Examples of identifying hybridization and geometry for atoms in organic molecules.", "slug": "organic-hybridization-practice"}, {"path": "khan/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/tetrahedral-bond-angle-proof/", "id": "2UTr46btzaY", "title": "Tetrahedral bond angle proof", "kind": "Video", "slug": "tetrahedral-bond-angle-proof"}], "in_knowledge_map": false, "description": "How closely bonded are you to your idea of orbitals? In this tutorial, we will learn about hybridized orbitals, the ligers of organic chemistry.", "node_slug": "hybrid-orbitals-jay", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay", "extended_slug": "science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay", "kind": "Topic", "slug": "hybrid-orbitals-jay"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/gen-chem-review/bond-line-structures/", "id": "bond-line-structures", "hide": false, "title": "Bond-line structures", "child_data": [{"kind": "Video", "id": "xd71b1802"}, {"kind": "Video", "id": "xb6adcc2c"}, {"kind": "Video", "id": "x9743c887"}, {"kind": "Video", "id": "x76d2d9c0"}], "children": [{"path": "khan/science/organic-chemistry/gen-chem-review/bond-line-structures/condensed-structures/", "id": "XEPdMvZqCHQ", "title": "Condensed structures", "kind": "Video", "description": "How to go from Lewis dot structures to partially condensed structures to condensed structures", "slug": "condensed-structures"}, {"path": "khan/science/organic-chemistry/gen-chem-review/bond-line-structures/bond-line-structures-new/", "id": "8AwKNC1texM", "title": "Bond-line structures", "kind": "Video", "description": "How to draw bond-line structures", "slug": "bond-line-structures-new"}, {"path": "khan/science/organic-chemistry/gen-chem-review/bond-line-structures/three-dimensional-bond-line-structures-new/", "id": "ZAgQH2azx3w", "title": "Three-dimensional bond-line structures", "kind": "Video", "description": "How to represent three-dimensional molecules using bond-line structures", "slug": "three-dimensional-bond-line-structures-new"}, {"path": "khan/science/organic-chemistry/gen-chem-review/bond-line-structures/structural-constitutional-isomers-new/", "id": "RBbJKOOZ6FY", "title": "Structural (constitutional) isomers", "kind": "Video", "description": "How to draw structural isomers using bond-line structures", "slug": "structural-constitutional-isomers-new"}], "in_knowledge_map": false, "description": "Call them Bonds. Covalent Bonds. Smart chemists need time to stir (and shake) their solutions. In this tutorial, we will explain how chemists use bond-line structures as a form of organic shorthand to skip time-consuming carbon and hydrogen atoms labeling. Watch this tutorial so you too can be in the Dr. Know.", "node_slug": "bond-line-structures", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/gen-chem-review/bond-line-structures", "extended_slug": "science/organic-chemistry/gen-chem-review/bond-line-structures", "kind": "Topic", "slug": "bond-line-structures"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/gen-chem-review/electronegativity-polarity/", "id": "electronegativity-polarity", "hide": false, "title": "Electronegativity", "child_data": [{"kind": "Video", "id": "x57ecb61f"}, {"kind": "Video", "id": "x03aa879e"}, {"kind": "Video", "id": "x3d65853e"}, {"kind": "Video", "id": "xe50d545d"}, {"kind": "Video", "id": "xd9a60692"}], "children": [{"path": "khan/science/organic-chemistry/gen-chem-review/electronegativity-polarity/electronegativity-and-chemical-bonds/", "id": "126N4hox9YA", "title": "Electronegativity and bonding", "kind": "Video", "description": "Electronegativity differences in bonding using Pauling scale. Using differences in electronegativity to classify bonds as covalent, polar covalent, or ionic.", "slug": "electronegativity-and-chemical-bonds"}, {"path": "khan/science/organic-chemistry/gen-chem-review/electronegativity-polarity/dipole-moment/", "id": "q3g3jsmCOEQ", "title": "Dipole moment", "kind": "Video", "slug": "dipole-moment"}, {"path": "khan/science/organic-chemistry/gen-chem-review/electronegativity-polarity/intermolecular-forces-and-molecular-bonds/", "id": "pBZ-RiT5nEE", "title": "Intermolecular forces", "kind": "Video", "description": "Identifying the intermolecular forces present between molecules", "slug": "intermolecular-forces-and-molecular-bonds"}, {"path": "khan/science/organic-chemistry/gen-chem-review/electronegativity-polarity/boiling-points-of-organic-compounds/", "id": "pILGRZ0nT4o", "title": "Boiling points of organic compounds", "kind": "Video", "description": "How to analyze the different boiling points of organic compounds using intermolecular forces", "slug": "boiling-points-of-organic-compounds"}, {"path": "khan/science/organic-chemistry/gen-chem-review/electronegativity-polarity/solubility-of-organic-compounds-redo/", "id": "_mWHWJiMKXU", "title": "Solubility of organic compounds", "kind": "Video", "description": "How to determine whether or not an organic compound dissolves in water", "slug": "solubility-of-organic-compounds-redo"}], "in_knowledge_map": false, "description": "What is the most attractive concept in undergraduate organic chemistry? Currently most are polarized on the topic, but the pull of electronegativity is hard to resist. Within this tutorial, we will learn about electronegativity and see how it applies to polarity, intermolecular forces, and physical properties.", "node_slug": "electronegativity-polarity", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/gen-chem-review/electronegativity-polarity", "extended_slug": "science/organic-chemistry/gen-chem-review/electronegativity-polarity", "kind": "Topic", "slug": "electronegativity-polarity"}], "in_knowledge_map": false, "description": "Dot structures, hybridization, bond-line structures, electronegativity, polarity, physical properties", "node_slug": "gen-chem-review", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/gen-chem-review", "extended_slug": "science/organic-chemistry/gen-chem-review", "kind": "Topic", "slug": "gen-chem-review"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/organic-structures/", "id": "organic-structures", "hide": false, "title": "Resonance and acid-base chemistry", "child_data": [{"kind": "Topic", "id": "x4c0f04b6"}, {"kind": "Topic", "id": "x5e377598"}, {"kind": "Topic", "id": "xf3fbf21d"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/", "id": "oxidation-reduction-review", "hide": false, "title": "Counting electrons", "child_data": [{"kind": "Video", "id": "xc634cc0f"}, {"kind": "Video", "id": "xf1ada09f"}, {"kind": "Video", "id": "xb4f70eab"}, {"kind": "Video", "id": "x101275b0"}, {"kind": "Video", "id": "x2d55cdfd"}, {"kind": "Video", "id": "xd17bb400"}], "children": [{"path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/comparing-formal-charges-to-oxidation-states/", "id": "CuGg-Tf8lPI", "title": "Comparing formal charges to oxidation states", "kind": "Video", "description": "How formal charges and oxidation states are both ways of counting electrons", "slug": "comparing-formal-charges-to-oxidation-states"}, {"path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/formal-charge-on-carbon/", "id": "7p2qfyqiXHc", "title": "Formal charge on carbon", "kind": "Video", "description": "How to calculate the formal charge on carbon", "slug": "formal-charge-on-carbon"}, {"path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/formal-charge-on-nitrogen/", "id": "5-MM39VCwc0", "title": "Formal charge on nitrogen", "kind": "Video", "description": "How to calculate the formal charge on nitrogen", "slug": "formal-charge-on-nitrogen"}, {"path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/formal-charge-on-oxygen/", "id": "8x8tA4YPhJw", "title": "Formal charge on oxygen", "kind": "Video", "description": "How to calculate the formal charge on oxygen", "slug": "formal-charge-on-oxygen"}, {"path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/oxidation-states-of-carbon/", "id": "rhuYuerbhIE", "title": "Oxidation states of carbon", "kind": "Video", "description": "How to assign oxidation states to carbon in different compounds", "slug": "oxidation-states-of-carbon"}, {"path": "khan/science/organic-chemistry/organic-structures/oxidation-reduction-review/organic-oxidation-reduction-reactions/", "id": "bJMUKNbAsTY", "title": "Organic oxidation-reduction reactions", "kind": "Video", "description": "How to determine if a starting compound is oxidized, reduced, or neither", "slug": "organic-oxidation-reduction-reactions"}], "in_knowledge_map": false, "description": "Aspiring chemists need to be able to count electrons. Without this ability, your days as a chemist would be numbered. In this tutorial, you will learn how to count electrons to assign formal charges and oxidation states. Both forms of \"electron bookkeeping\" are important concepts to understand for organic reactions.", "node_slug": "oxidation-reduction-review", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/organic-structures/oxidation-reduction-review", "extended_slug": "science/organic-chemistry/organic-structures/oxidation-reduction-review", "kind": "Topic", "slug": "oxidation-reduction-review"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/organic-structures/formal-charge-resonance/", "id": "formal-charge-resonance", "hide": false, "title": "Resonance structures", "child_data": [{"kind": "Video", "id": "xc4146fe1"}, {"kind": "Video", "id": "xa446b68b"}, {"kind": "Video", "id": "x2f70b03b"}, {"kind": "Video", "id": "xfe91c63d"}, {"kind": "Video", "id": "x4019f7cd"}], "children": [{"path": "khan/science/organic-chemistry/organic-structures/formal-charge-resonance/resonance-intro-jay/", "id": "7BgiKyvviyU", "title": "Resonance structures", "kind": "Video", "slug": "resonance-intro-jay"}, {"path": "khan/science/organic-chemistry/organic-structures/formal-charge-resonance/resonance-pattern-jay/", "id": "UHZHkZ6_H5o", "title": "Resonance structure patterns", "kind": "Video", "slug": "resonance-pattern-jay"}, {"path": "khan/science/organic-chemistry/organic-structures/formal-charge-resonance/resonance-benzene-phenoxide/", "id": "oxf0LMJTklg", "title": "Resonance structures for benzene and the phenoxide anion", "kind": "Video", "slug": "resonance-benzene-phenoxide"}, {"path": "khan/science/organic-chemistry/organic-structures/formal-charge-resonance/common-mistakes-when-drawing-resonance-structures/", "id": "qpP8D7yQV50", "title": "Common mistakes when drawing resonance structures", "kind": "Video", "description": "How to avoid common mistakes when drawing resonance structures", "slug": "common-mistakes-when-drawing-resonance-structures"}, {"path": "khan/science/organic-chemistry/organic-structures/formal-charge-resonance/resonance-localized-delocalized/", "id": "kQCS1AhAnMI", "title": "Resonance structures and hybridization", "kind": "Video", "slug": "resonance-localized-delocalized"}], "in_knowledge_map": false, "description": "Are bond-line drawings not resonating with you? Sometimes one drawing is not enough to accurately describe the distribution of electron density. In this tutorial, we will learn how two or more resonance structures are merged to give us a single representation (a resonance hybrid).", "node_slug": "formal-charge-resonance", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/organic-structures/formal-charge-resonance", "extended_slug": "science/organic-chemistry/organic-structures/formal-charge-resonance", "kind": "Topic", "slug": "formal-charge-resonance"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/organic-structures/acid-base-review/", "id": "acid-base-review", "hide": false, "title": "Organic acid-base chemistry", "child_data": [{"kind": "Video", "id": "x820e415b"}, {"kind": "Video", "id": "xc8145b95"}, {"kind": "Video", "id": "x4c27d237"}, {"kind": "Video", "id": "x776a8f4f"}, {"kind": "Video", "id": "x286cdec9"}, {"kind": "Video", "id": "xb3c10af1"}, {"kind": "Video", "id": "x9917ce51"}, {"kind": "Video", "id": "x13d9aabd"}, {"kind": "Video", "id": "x399b07b9"}, {"kind": "Video", "id": "x626859b2"}, {"kind": "Video", "id": "x9106ae10"}, {"kind": "Video", "id": "x0c85563e"}], "children": [{"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/acid-base-lewis-bronsted-lowry/", "id": "diCb6JkLlQE", "title": "Acid-base definitions", "kind": "Video", "slug": "acid-base-lewis-bronsted-lowry"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/organic-acid-base-mechanisms/", "id": "jIL333CKE9A", "title": "Organic acid-base mechanisms", "kind": "Video", "description": "How to use curved arrows to draw mechanisms for organic acid-base reactions", "slug": "organic-acid-base-mechanisms"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/ka-and-acid-strength/", "id": "BeHOvYchtBg", "title": "Ka and acid strength", "kind": "Video", "description": "How to write an equilibrium expression for an acid-base reaction and how to evaluate the strength of an acid using Ka", "slug": "ka-and-acid-strength"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/ka-and-pka-review/", "id": "YEUQXx0fx_I", "title": "Ka and pKa review", "kind": "Video", "description": "A short review of Ka and pKa for students taking organic chemistry", "slug": "ka-and-pka-review"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/using-a-pka-table/", "id": "OhAAi3DZ984", "title": "Using a pKa table", "kind": "Video", "description": "How to use a pKa table to determine relative acid strengths", "slug": "using-a-pka-table"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/using-pka-values-to-predict-the-position-of-equilibrium-new/", "id": "ve5hfX3ywk0", "title": "Using pKa values to predict the position of equilibrium", "kind": "Video", "description": "How to use pKa values to predict the position of equilibrium for organic acid-base reactions", "slug": "using-pka-values-to-predict-the-position-of-equilibrium-new"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/stabilization-of-a-conjugate-base-electronegativity-new/", "id": "VkrOYs2LFNk", "title": "Stabilization of a conjugate base: electronegativity", "kind": "Video", "description": "How electronegativity affects the stabilization of a conjugate base (when comparing elements in the same period)", "slug": "stabilization-of-a-conjugate-base-electronegativity-new"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/acid-strength-anion-size-and-bond-energy/", "id": "Ce4BGV1DVVg", "title": "Acid strength, anion size, and bond energy", "kind": "Video", "description": "How anion size and bond dissociation energies affect acidity", "slug": "acid-strength-anion-size-and-bond-energy"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/stabilization-of-a-conjugate-base-resonance-new/", "id": "COZqJb-HT-k", "title": "Stabilization of a conjugate base: resonance", "kind": "Video", "description": "How resonance affects the stability of a conjugate base", "slug": "stabilization-of-a-conjugate-base-resonance-new"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/stabilization-of-a-conjugate-base-induction-new/", "id": "znlvsmuROwI", "title": "Stabilization of a conjugate base: induction", "kind": "Video", "description": "How a conjugate base is stabilized by the inductive effect", "slug": "stabilization-of-a-conjugate-base-induction-new"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/stabilization-of-a-conjugate-base-hybridization/", "id": "kl8nvKKGvOg", "title": "Stabilization of a conjugate base: hybridization", "kind": "Video", "description": "How increased s character in a hybrid orbital stabilizes the conjugate base", "slug": "stabilization-of-a-conjugate-base-hybridization"}, {"path": "khan/science/organic-chemistry/organic-structures/acid-base-review/stabilization-of-a-conjugate-base-solvation/", "id": "vAYoAH98Gag", "title": "Stabilization of a conjugate base: solvation", "kind": "Video", "description": "How the solvent affects the stability of a conjugate base", "slug": "stabilization-of-a-conjugate-base-solvation"}], "in_knowledge_map": false, "description": "Do you remember the basics of acid-base chemistry? If your answer is neutral, then you might want to watch this tutorial and review these important concepts from general chemistry.", "node_slug": "acid-base-review", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/organic-structures/acid-base-review", "extended_slug": "science/organic-chemistry/organic-structures/acid-base-review", "kind": "Topic", "slug": "acid-base-review"}], "in_knowledge_map": false, "description": "Formal charges, oxidation states, oxidation-reduction reactions, resonance structures, acid-base chemistry", "node_slug": "organic-structures", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/organic-structures", "extended_slug": "science/organic-chemistry/organic-structures", "kind": "Topic", "slug": "organic-structures"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/", "id": "bond-line-structures-alkanes-cycloalkanes", "hide": false, "title": "Alkanes, cycloalkanes, and functional groups", "child_data": [{"kind": "Topic", "id": "x69d8363e"}, {"kind": "Topic", "id": "x5ba816e4"}, {"kind": "Topic", "id": "x31eded36"}, {"kind": "Topic", "id": "xde2fbe5d"}, {"kind": "Topic", "id": "xe0f45711"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/", "id": "naming-alkanes", "hide": false, "title": "Naming alkanes", "child_data": [{"kind": "Video", "id": "2600599"}, {"kind": "Video", "id": "2600600"}, {"kind": "Video", "id": "2600601"}, {"kind": "Video", "id": "2600602"}, {"kind": "Video", "id": "2600603"}, {"kind": "Video", "id": "x78da269e"}, {"kind": "Video", "id": "xb440ca7f"}, {"kind": "Video", "id": "2600605"}, {"kind": "Video", "id": "2600606"}, {"kind": "Video", "id": "x1e724a5d"}, {"kind": "Video", "id": "x2779ce12"}, {"kind": "Video", "id": "2600608"}], "children": [{"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/representing-structures-of-organic-molecules/", "id": "pMoA65Dj-zk", "title": "Representing structures of organic molecules", "kind": "Video", "description": "Representing Structures of Organic Molecules", "slug": "representing-structures-of-organic-molecules"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/naming-simple-alkanes/", "id": "NRFPvLp3r3g", "title": "Naming simple alkanes", "kind": "Video", "description": "Naming Simple Alkanes", "slug": "naming-simple-alkanes"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/naming-alkanes-with-alkyl-groups/", "id": "KKAD-OOOHxg", "title": "Naming alkanes with alkyl groups", "kind": "Video", "description": "Naming Alkanes with Alkyl Groups", "slug": "naming-alkanes-with-alkyl-groups"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/correction-2-propylheptane-should-never-be-the-name/", "id": "CFBKfgGTP98", "title": "Correction - 2-propylheptane should never be the name!", "kind": "Video", "description": "Correction - 2-Propylheptane should never be the name!", "slug": "correction-2-propylheptane-should-never-be-the-name"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/common-and-systematic-naming-iso-sec-and-tert-prefixes/", "id": "TJUm860AjNw", "title": "Common and systematic naming: iso-, sec-, and tert- prefixes", "kind": "Video", "description": "Common and Systematic Naming-Iso, Sec and Tert Prefixes", "slug": "common-and-systematic-naming-iso-sec-and-tert-prefixes"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/alkane-with-ethyl-groups/", "id": "q_Q9C1Ooofc", "title": "Naming alkanes with ethyl groups", "kind": "Video", "slug": "alkane-with-ethyl-groups"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/alkane-with-isopropyl-group/", "id": "O9RPGJcAfJk", "title": "Alkane with isopropyl group", "kind": "Video", "slug": "alkane-with-isopropyl-group"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/organic-chemistry-naming-examples-2/", "id": "CJRQ8gOjq4E", "title": "Organic chemistry naming examples 2", "kind": "Video", "description": "Organic Chemistry Naming Examples 2", "slug": "organic-chemistry-naming-examples-2"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/organic-chemistry-naming-examples-3/", "id": "Se-ekDNhCDk", "title": "Organic chemistry naming examples 3", "kind": "Video", "description": "Organic Chemistry Naming Examples 3", "slug": "organic-chemistry-naming-examples-3"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/naming-cycloalkane/", "id": "ygXkdSKXQoA", "title": "Naming a cycloalkane", "kind": "Video", "slug": "naming-cycloalkane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/systematic-naming-of-isobutyl-groups/", "id": "Xw1CMTXQGPY", "title": "Naming two isobutlyl groups systematically", "kind": "Video", "slug": "systematic-naming-of-isobutyl-groups"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/organic-chemistry-naming-examples-5/", "id": "6BR0Q5e74bs", "title": "Organic chemistry naming examples 5", "kind": "Video", "description": "Organic Chemistry Naming Examples 5", "slug": "organic-chemistry-naming-examples-5"}], "in_knowledge_map": false, "description": "Methane, ethane, propane, butane . . . by the time you get to five carbons you might have some pent up frustration. By six carbons you might even believe that you are hexed! Don\u2019t worry though, you\u2019ll feel sane again once Sal shows you how to name alkanes in this tutorial.", "node_slug": "naming-alkanes", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes", "extended_slug": "science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes", "kind": "Topic", "slug": "naming-alkanes"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic/", "id": "naming-alkanes-cycloalkanes-bicyclic", "hide": false, "title": "Naming alkanes, cycloalkanes, and bicyclic compounds", "child_data": [{"kind": "Video", "id": "1258931482"}, {"kind": "Video", "id": "1258818691"}, {"kind": "Video", "id": "1258294932"}, {"kind": "Video", "id": "1258870500"}, {"kind": "Video", "id": "1259064484"}, {"kind": "Video", "id": "x4510a483"}], "children": [{"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic/alkane-and-cycloalkane-nomenclature-i/", "id": "F8RCR_1jIAk", "title": "Alkane and cycloalkane nomenclature I", "kind": "Video", "slug": "alkane-and-cycloalkane-nomenclature-i"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic/alkane-and-cycloalkane-nomenclature-ii/", "id": "9tEnXUuHkp4", "title": "Alkane and cycloalkane nomenclature II", "kind": "Video", "description": "Correction: 2,2,6,6,7-pentamethyloctane is the correct name. I put a dash instead of a comma between the 6 and the 7 on the video.", "slug": "alkane-and-cycloalkane-nomenclature-ii"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic/alkane-and-cycloalkane-nomenclature-iii/", "id": "joQd0qVnX4M", "title": "Alkane and cycloalkane nomenclature III", "kind": "Video", "slug": "alkane-and-cycloalkane-nomenclature-iii"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic/bicyclic-compounds/", "id": "cM-SFbffb7k", "title": "Bicyclic compounds", "kind": "Video", "slug": "bicyclic-compounds"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic/naming-cubane/", "id": "ayKHmN90ncc", "title": "Naming cubane", "kind": "Video", "slug": "naming-cubane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic/heats-of-combustion-of-alkanes/", "id": "8QYiN--_4-c", "title": "Heats of combustion of alkanes", "kind": "Video", "description": "How to use heats of combustion to compare the stability of isomeric alkanes", "slug": "heats-of-combustion-of-alkanes"}], "in_knowledge_map": false, "description": "Do you speak the language of organic chemistry? Nomenclature running rings around you? Feel like the victim of a vicious cycle? In this tutorial, we will learn how to be fluent in naming alkanes, cycloalkanes, and bicyclic compounds.", "node_slug": "naming-alkanes-cycloalkanes-bicyclic", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic", "extended_slug": "science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes-cycloalkanes-bicyclic", "kind": "Topic", "slug": "naming-alkanes-cycloalkanes-bicyclic"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/", "id": "conformations-alkanes-cycloalkanes", "hide": false, "title": "Conformations of alkanes", "child_data": [{"kind": "Video", "id": "2600613"}, {"kind": "Video", "id": "2600614"}, {"kind": "Video", "id": "x247e5a2f"}, {"kind": "Video", "id": "xbfb3d161"}, {"kind": "Video", "id": "x7a5516aa"}, {"kind": "Video", "id": "xe69c6a56"}, {"kind": "Video", "id": "x156c864b"}, {"kind": "Video", "id": "xa2212bc9"}], "children": [{"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/newman-projections/", "id": "IkmM4CPnqF0", "title": "Newman projections", "kind": "Video", "description": "Newman Projections", "slug": "newman-projections"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/newman-projections-2/", "id": "ryJvNEHcuDg", "title": "Newman projections 2", "kind": "Video", "description": "Newman Projections 2", "slug": "newman-projections-2"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/conformations-of-ethane/", "id": "E52oU-pwDxY", "title": "Conformations of ethane", "kind": "Video", "description": "How to represent the staggered and eclipsed conformations of ethane", "slug": "conformations-of-ethane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/conformational-analysis-of-ethane/", "id": "vOq6cwT-l2U", "title": "Conformational analysis of ethane", "kind": "Video", "description": "How to analyze the staggered and eclipsed conformations of ethane", "slug": "conformational-analysis-of-ethane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/conformational-analysis-of-propane/", "id": "lIJ45KYQOLM", "title": "Conformational analysis of propane", "kind": "Video", "description": "How to analyze the staggered and eclipsed conformations of propane", "slug": "conformational-analysis-of-propane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/conformational-analysis-of-butane/", "id": "dTst62XXJ8g", "title": "Conformational analysis of butane", "kind": "Video", "description": "How to analyze the staggered and eclipsed conformations of butane", "slug": "conformational-analysis-of-butane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/newman-projection-practice-1/", "id": "MOHzzgQLkk8", "title": "Newman projection practice 1", "kind": "Video", "description": "How to use Newman projections to determine the most and least stable conformations of a compound", "slug": "newman-projection-practice-1"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes/newman-projection-practice-2/", "id": "iUrleWSqok4", "title": "Newman projection practice 2", "kind": "Video", "description": "How to determine the most and least stable conformations using Newman projections", "slug": "newman-projection-practice-2"}], "in_knowledge_map": false, "description": "Feeling unsure about conformations? If you need a little more perspective on alkanes, try looking at them from Newman\u2019s point of view. The result might leave you feeling more stable.", "node_slug": "conformations-alkanes-cycloalkanes", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes", "extended_slug": "science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations-alkanes-cycloalkanes", "kind": "Topic", "slug": "conformations-alkanes-cycloalkanes"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/", "id": "conformations", "hide": false, "title": "Conformations of cycloalkanes", "child_data": [{"kind": "Video", "id": "2600615"}, {"kind": "Video", "id": "2600616"}, {"kind": "Video", "id": "x0446fbe1"}, {"kind": "Video", "id": "xcbb6b14e"}, {"kind": "Video", "id": "x15858c1d"}, {"kind": "Video", "id": "x697ddcea"}, {"kind": "Video", "id": "x219ba23b"}, {"kind": "Video", "id": "x3b2b712d"}], "children": [{"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/chair-and-boat-shapes-for-cyclohexane/", "id": "YUEkOBvJSNg", "title": "Chair and boat shapes for cyclohexane", "kind": "Video", "description": "Chair and Boat Shapes for Cyclohexane", "slug": "chair-and-boat-shapes-for-cyclohexane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/double-newman-diagram-for-methcyclohexane/", "id": "I6LsWSXx8fg", "title": "Double Newman diagram for methylcyclohexane", "kind": "Video", "description": "Double Newman diagram for methylcyclohexane", "slug": "double-newman-diagram-for-methcyclohexane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/stability-of-cycloalkanes/", "id": "DXc4pa9lIaA", "title": "Stability of cycloalkanes", "kind": "Video", "description": "How to analyze the stability of cyclopropane, cyclobutane, cyclopentane, and cyclohexane", "slug": "stability-of-cycloalkanes"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/conformations-of-cyclohexane/", "id": "p9NzhA3E-70", "title": "Conformations of cyclohexane", "kind": "Video", "description": "How to analyze the chair and boat conformations of cyclohexane", "slug": "conformations-of-cyclohexane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/drawing-chair-conformations/", "id": "AtK0QQYHKCk", "title": "Drawing chair conformations", "kind": "Video", "description": "How to draw both chair conformations of cyclohexane", "slug": "drawing-chair-conformations"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/monosubstituted-cyclohexane/", "id": "kNQnnshdNuo", "title": "Monosubstituted cyclohexane", "kind": "Video", "description": "How to draw and analyze the two chair conformations for a monosubstituted cyclohexane", "slug": "monosubstituted-cyclohexane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/disubstituted-cyclohexane/", "id": "TI27-ZN2Glg", "title": "Disubstituted cyclohexane", "kind": "Video", "description": "How to draw chair conformations for disubstituted cyclohexane", "slug": "disubstituted-cyclohexane"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations/polysubstituted-cyclohexane/", "id": "BwPjtAe1gvE", "title": "Polysubstituted cyclohexane", "kind": "Video", "description": "How to draw the chair conformations for menthol", "slug": "polysubstituted-cyclohexane"}], "in_knowledge_map": false, "description": "Do conformations float your boat? If so, pull up a chair and learn about the different conformations of cyclohexane.", "node_slug": "conformations", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations", "extended_slug": "science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/conformations", "kind": "Topic", "slug": "conformations"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/functional-groups/", "id": "functional-groups", "hide": false, "title": "Functional groups", "child_data": [{"kind": "Video", "id": "x37d2751b"}, {"kind": "Video", "id": "x3eb08868"}, {"kind": "Video", "id": "x6b3069a7"}], "children": [{"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/functional-groups/functional-groups-first/", "id": "FYTfo4y91TI", "title": "Functional groups", "kind": "Video", "description": "An overview of some common functional groups", "slug": "functional-groups-first"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/functional-groups/more-functional-groups/", "id": "Z9IWg0pcpqo", "title": "More functional groups", "kind": "Video", "description": "An overview of the carbonyl-containing functional groups", "slug": "more-functional-groups"}, {"path": "khan/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/functional-groups/identifying-functional-groups/", "id": "esJ5MbAHswc", "title": "Identifying functional groups", "kind": "Video", "description": "How to identify functional groups present in organic compounds", "slug": "identifying-functional-groups"}], "in_knowledge_map": false, "description": "The chemistry of every organic compound is determined by the functional groups it contains. In this tutorial, we put the fun back into identifying functional groups!", "node_slug": "functional-groups", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/functional-groups", "extended_slug": "science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/functional-groups", "kind": "Topic", "slug": "functional-groups"}], "in_knowledge_map": false, "description": "Naming alkanes and cycloalkanes, conformations of alkanes and cycloalkanes, functional groups", "node_slug": "bond-line-structures-alkanes-cycloalkanes", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes", "extended_slug": "science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes", "kind": "Topic", "slug": "bond-line-structures-alkanes-cycloalkanes"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/stereochemistry-topic/", "id": "stereochemistry-topic", "hide": false, "title": "Stereochemistry", "child_data": [{"kind": "Topic", "id": "x4bf8c782"}, {"kind": "Topic", "id": "x65cd8a43"}, {"kind": "Topic", "id": "x4f5d2bbd"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/", "id": "chirality-r-s-system", "hide": false, "title": "Chirality", "child_data": [{"kind": "Video", "id": "2600617"}, {"kind": "Video", "id": "2600618"}, {"kind": "Video", "id": "2600619"}, {"kind": "Video", "id": "x8d536852"}, {"kind": "Video", "id": "x2e2a085c"}, {"kind": "Video", "id": "xf93f34c5"}], "children": [{"path": "khan/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/introduction-to-chirality/", "id": "tk-SNvCPLCE", "title": "Introduction to chirality", "kind": "Video", "description": "Introduction to Chirality", "slug": "introduction-to-chirality"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/chiral-examples-1/", "id": "0XSSPow5oAc", "title": "Chiral examples 1", "kind": "Video", "description": "Chiral Examples 1", "slug": "chiral-examples-1"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/chiral-examples-2/", "id": "QQMZ1ljepWg", "title": "Chiral examples 2", "kind": "Video", "description": "Chiral Examples 2", "slug": "chiral-examples-2"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/chiral-achiral-jay/", "id": "yChPRfm4yvg", "title": "Chiral vs achiral", "kind": "Video", "slug": "chiral-achiral-jay"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/stereoisomer-enantiomer-jay/", "id": "3Ya7I-oDGU0", "title": "Stereoisomers, enantiomers, and chirality centers", "kind": "Video", "slug": "stereoisomer-enantiomer-jay"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/chirality-center-jay/", "id": "ij1TfRMODhA", "title": "Identifying chirality centers", "kind": "Video", "slug": "chirality-center-jay"}], "in_knowledge_map": false, "description": "Are you right handed or sinister-handed? Have you ever thought that you might not be as attractive as you look in the mirror? Welcome to the world of chirality!", "node_slug": "chirality-r-s-system", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system", "extended_slug": "science/organic-chemistry/stereochemistry-topic/chirality-r-s-system", "kind": "Topic", "slug": "chirality-r-s-system"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/stereochemistry-topic/optical-activity/", "id": "optical-activity", "hide": false, "title": "Enantiomers", "child_data": [{"kind": "Video", "id": "x747f9bc8"}, {"kind": "Video", "id": "2600620"}, {"kind": "Video", "id": "x782cfec3"}, {"kind": "Video", "id": "2600621"}, {"kind": "Video", "id": "xb8129286"}, {"kind": "Video", "id": "x8029dc9d"}, {"kind": "Video", "id": "x19608fd7"}, {"kind": "Video", "id": "x1133e268"}, {"kind": "Video", "id": "x394e2501"}, {"kind": "Video", "id": "x920ec23a"}], "children": [{"path": "khan/science/organic-chemistry/stereochemistry-topic/optical-activity/drawing-enantiomers/", "id": "HOMn523JBok", "title": "Drawing enantiomers", "kind": "Video", "description": "How to draw enantiomers", "slug": "drawing-enantiomers"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/optical-activity/cahn-ingold-prelog-system-for-naming-enantiomers/", "id": "DfO27juYly8", "title": "Cahn-Ingold-Prelog system for naming enantiomers", "kind": "Video", "description": "Cahn-Ingold-Prelog System for Naming Enantiomers", "slug": "cahn-ingold-prelog-system-for-naming-enantiomers"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/optical-activity/rs-system-new/", "id": "kFD6hzLseVs", "title": "R,S system", "kind": "Video", "description": "How to assign the configuration of a chirality center using the R,S system", "slug": "rs-system-new"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/optical-activity/r-s-cahn-ingold-prelog-naming-system-example-2/", "id": "peQsBg9P4ms", "title": "R,S (Cahn-Ingold-Prelog) naming system example 2", "kind": "Video", "description": "R,S (Cahn-Ingold-Prelog) Naming System Example 2", "slug": "r-s-cahn-ingold-prelog-naming-system-example-2"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/optical-activity/rs-system-practice-new/", "id": "rzXRZFMcZyU", "title": "R,S system practice", "kind": "Video", "description": "How to assign a configuration to a chirality center using the R,S system", "slug": "rs-system-practice-new"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/optical-activity/optical-activity-new/", "id": "1LdFePZHAyY", "title": "Optical activity", "kind": "Video", "description": "How optically active compounds rotate plane polarized light", "slug": "optical-activity-new"}], "in_knowledge_map": false, "description": "In this tutorial, we will explore enantiomers, compounds that have the same composition and bonding but are fundamentally different because they are mirror images of each other (kind of like Tomax and Xamot--the Crimson Guard Commanders from GI Joe).", "node_slug": "optical-activity", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/stereochemistry-topic/optical-activity", "extended_slug": "science/organic-chemistry/stereochemistry-topic/optical-activity", "kind": "Topic", "slug": "optical-activity"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/stereochemistry-topic/diastereomers-meso-compounds/", "id": "diastereomers-meso-compounds", "hide": false, "title": "Stereoisomeric relationships", "child_data": [{"kind": "Video", "id": "2600622"}, {"kind": "Video", "id": "xba150dc2"}, {"kind": "Video", "id": "xc5102e1d"}], "children": [{"path": "khan/science/organic-chemistry/stereochemistry-topic/diastereomers-meso-compounds/stereoisomers-enantiomers-diastereomers-constitutional-isomers-and-meso-compounds/", "id": "457xnJv80O0", "title": "Stereoisomers, enantiomers, diastereomers, constitutional isomers and meso compounds", "kind": "Video", "description": "Stereoisomers, Enantiomers, Diastereomers, Constitutional Isomers and Meso Compounds", "slug": "stereoisomers-enantiomers-diastereomers-constitutional-isomers-and-meso-compounds"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/diastereomers-meso-compounds/enantiomers-and-diastereomers/", "id": "aYp39AaZqvI", "title": "Enantiomers and diastereomers", "kind": "Video", "description": "How to tell the difference between enantiomers and diastereomers", "slug": "enantiomers-and-diastereomers"}, {"path": "khan/science/organic-chemistry/stereochemistry-topic/diastereomers-meso-compounds/meso-compounds-new-july/", "id": "zNAL1R-hZr0", "title": "Meso compounds", "kind": "Video", "description": "How to identify meso compounds", "slug": "meso-compounds-new-july"}], "in_knowledge_map": false, "description": "Mirror, mirror on the wall . . . who is the fairest stereoisomer of all? In this tutorial, we will examine the relationships between different stereoisomers.", "node_slug": "diastereomers-meso-compounds", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/stereochemistry-topic/diastereomers-meso-compounds", "extended_slug": "science/organic-chemistry/stereochemistry-topic/diastereomers-meso-compounds", "kind": "Topic", "slug": "diastereomers-meso-compounds"}], "in_knowledge_map": false, "description": "Chirality, stereoisomers, assigning configurations using the R,S system, optical activity, Fischer projections, diastereomers, meso compounds", "node_slug": "stereochemistry-topic", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/stereochemistry-topic", "extended_slug": "science/organic-chemistry/stereochemistry-topic", "kind": "Topic", "slug": "stereochemistry-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/substitution-elimination-reactions/", "id": "substitution-elimination-reactions", "hide": false, "title": "Substitution and elimination reactions", "child_data": [{"kind": "Topic", "id": "x09c75f63"}, {"kind": "Topic", "id": "xe4e2ca9a"}, {"kind": "Topic", "id": "x5c937415"}, {"kind": "Topic", "id": "x6724bc30"}, {"kind": "Topic", "id": "xfc5290e2"}, {"kind": "Topic", "id": "x1ab71ea9"}, {"kind": "Topic", "id": "x9e5c7240"}, {"kind": "Topic", "id": "x8a19f4ad"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/substitution-elimination-reactions/free-radical-reaction-alkanes/", "id": "free-radical-reaction-alkanes", "hide": false, "title": "Free radical reaction", "child_data": [{"kind": "Video", "id": "62"}], "children": [{"path": "khan/science/organic-chemistry/substitution-elimination-reactions/free-radical-reaction-alkanes/free-radical-reactions/", "id": "5HgzsltWwK8", "title": "Free radical reactions", "kind": "Video", "description": "Free Radical Reactions", "slug": "free-radical-reactions"}], "in_knowledge_map": false, "description": "In this tutorial, Sal introduces free radical reactions by showing the reaction of methane with chlorine.", "node_slug": "free-radical-reaction-alkanes", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/substitution-elimination-reactions/free-radical-reaction-alkanes", "extended_slug": "science/organic-chemistry/substitution-elimination-reactions/free-radical-reaction-alkanes", "kind": "Topic", "slug": "free-radical-reaction-alkanes"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/", "id": "sn1-sn2-sal", "hide": false, "title": "Sn1 vs Sn2", "child_data": [{"kind": "Video", "id": "2600610"}, {"kind": "Video", "id": "xf9b7de55"}, {"kind": "Video", "id": "4802248"}, {"kind": "Video", "id": "x7b6850b9"}, {"kind": "Video", "id": "1377090052"}, {"kind": "Video", "id": "4802252"}, {"kind": "Video", "id": "x422b414a"}], "children": [{"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/naming-alkyl-halides/", "id": "jiJdNWzETSk", "title": "Naming alkyl halides", "kind": "Video", "description": "Naming Alkyl Halides", "slug": "naming-alkyl-halides"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/curly-arrow-conventions/", "id": "-z2yk8yxv08", "title": "Curly arrow conventions in organic chemistry", "kind": "Video", "slug": "curly-arrow-conventions"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/sn2-reactions/", "id": "iiGYwCGNrl8", "title": "Sn2 reactions", "kind": "Video", "description": "Sn2 Reactions", "slug": "sn2-reactions"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/sn1-reactions-introduction/", "id": "eB5NVPzBCzM", "title": "Sn1 reactions introduction", "kind": "Video", "slug": "sn1-reactions-introduction"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/steric-hindrance-1/", "id": "kiaU0jX-kk0", "title": "Steric hindrance", "kind": "Video", "slug": "steric-hindrance-1"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/sn2-stereochemistry/", "id": "WrsROtPSeuA", "title": "Sn2 stereochemistry", "kind": "Video", "description": "Sn2 Stereochemistry", "slug": "sn2-stereochemistry"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal/sn1-sn2-solvent-effects/", "id": "2jH_z9ra9L0", "title": "Sn1 and Sn2 solvents effects", "kind": "Video", "slug": "sn1-sn2-solvent-effects"}], "in_knowledge_map": false, "description": "In this tutorial, Sal analyzes the differences between SN1 and SN2 reactions.", "node_slug": "sn1-sn2-sal", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal", "extended_slug": "science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-sal", "kind": "Topic", "slug": "sn1-sn2-sal"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/substitution-elimination-reactions/nucleophilicity-basicity-sal/", "id": "nucleophilicity-basicity-sal", "hide": false, "title": "Nucleophilicity and basicity", "child_data": [{"kind": "Video", "id": "54"}, {"kind": "Video", "id": "55"}], "children": [{"path": "khan/science/organic-chemistry/substitution-elimination-reactions/nucleophilicity-basicity-sal/nucleophilicity-nucleophile-strength/", "id": "Z9Jh-Q59xso", "title": "Nucleophilicity (nucleophile strength)", "kind": "Video", "description": "Nucleophilicity (Nucleophile Strength)", "slug": "nucleophilicity-nucleophile-strength"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/nucleophilicity-basicity-sal/nucleophilicity-vs-basicity/", "id": "Mx7KM-k2MMo", "title": "Nucleophilicity vs. basicity", "kind": "Video", "description": "Nucleophilicity vs. Basicity . The difference between what it means to be a nucleophile and a base", "slug": "nucleophilicity-vs-basicity"}], "in_knowledge_map": false, "description": "In this tutorial, Sal discusses the difference between nucleophilicity and basicity.", "node_slug": "nucleophilicity-basicity-sal", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/substitution-elimination-reactions/nucleophilicity-basicity-sal", "extended_slug": "science/organic-chemistry/substitution-elimination-reactions/nucleophilicity-basicity-sal", "kind": "Topic", "slug": "nucleophilicity-basicity-sal"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/substitution-elimination-reactions/elimination-reactions-tutorial/", "id": "elimination-reactions-tutorial", "hide": false, "title": "Elimination reactions", "child_data": [{"kind": "Video", "id": "56"}, {"kind": "Video", "id": "57"}, {"kind": "Video", "id": "58"}], "children": [{"path": "khan/science/organic-chemistry/substitution-elimination-reactions/elimination-reactions-tutorial/e2-reactions/", "id": "J0gXdEAaSiA", "title": "E2 reactions", "kind": "Video", "description": "E2 Elimination Reactions", "slug": "e2-reactions"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/elimination-reactions-tutorial/e1-reactions/", "id": "U9dGHwsewNk", "title": "E1 reactions", "kind": "Video", "description": "E1 Elimination Reactions", "slug": "e1-reactions"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/elimination-reactions-tutorial/zaitsev-s-rule/", "id": "2jO--kC3aqk", "title": "Zaitsev's rule", "kind": "Video", "description": "Zaitsev's Rule for E2 and E1 reactions", "slug": "zaitsev-s-rule"}], "in_knowledge_map": false, "description": "In this tutorial, Sal explains the difference between an E1 and an E2 elimination reaction.", "node_slug": "elimination-reactions-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/substitution-elimination-reactions/elimination-reactions-tutorial", "extended_slug": "science/organic-chemistry/substitution-elimination-reactions/elimination-reactions-tutorial", "kind": "Topic", "slug": "elimination-reactions-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-sal/", "id": "sn1-sn2-e1-e2-sal", "hide": false, "title": "Sn1/Sn2/E1/E2", "child_data": [{"kind": "Video", "id": "59"}, {"kind": "Video", "id": "60"}, {"kind": "Video", "id": "61"}], "children": [{"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-sal/comparing-e2-e1-sn2-sn1-reactions/", "id": "12Rvts2NR7M", "title": "Comparing E2, E1, Sn2, Sn1 reactions", "kind": "Video", "description": "Comparing E2 E1 Sn2 Sn1 Reactions", "slug": "comparing-e2-e1-sn2-sn1-reactions"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-sal/e2-e1-sn2-sn1-reactions-example-2/", "id": "vinEPfrqfiU", "title": "E2 E1 Sn2 Sn1 reactions example 2", "kind": "Video", "description": "E2 E1 Sn2 Sn1 Reactions Example 2", "slug": "e2-e1-sn2-sn1-reactions-example-2"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-sal/e2-e1-sn2-sn1-reactions-example-3/", "id": "MtwvLru62Qw", "title": "E2 E1 Sn2 Sn1 reactions example 3", "kind": "Video", "description": "E2 E1 Sn2 Sn1 Reactions Example 3", "slug": "e2-e1-sn2-sn1-reactions-example-3"}], "in_knowledge_map": false, "description": "In this tutorial, Sal compares the differences between SN1, SN2, E1, and E2 reactions.", "node_slug": "sn1-sn2-e1-e2-sal", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-sal", "extended_slug": "science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-sal", "kind": "Topic", "slug": "sn1-sn2-e1-e2-sal"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/", "id": "sn1-sn2-tutorial", "hide": false, "title": "Sn1 and Sn2", "child_data": [{"kind": "Video", "id": "1258743999"}, {"kind": "Video", "id": "1258976400"}, {"kind": "Video", "id": "1259020264"}, {"kind": "Video", "id": "1259045152"}, {"kind": "Video", "id": "1258960831"}, {"kind": "Video", "id": "1258881838"}, {"kind": "Video", "id": "1258965234"}], "children": [{"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/nucleophile-electrophile-and-the-schwartz-rules/", "id": "O33b6B12YxI", "title": "Nucleophile/electrophile and the schwartz rules", "kind": "Video", "slug": "nucleophile-electrophile-and-the-schwartz-rules"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/alkyl-halide-nomenclature/", "id": "VPYDW1_FsyM", "title": "Alkyl halide nomenclature", "kind": "Video", "slug": "alkyl-halide-nomenclature"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/sn1-reaction-mechanism/", "id": "nwULacjb78c", "title": "Sn1 reaction: Mechanism", "kind": "Video", "slug": "sn1-reaction-mechanism"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/sn1-reaction-stereochemistry/", "id": "jUEzjS0IFxs", "title": "Sn1 reaction: Stereochemistry", "kind": "Video", "slug": "sn1-reaction-stereochemistry"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/sn2-mechanism-and-stereochemistry/", "id": "OiBnhcEA8M4", "title": "Sn2 mechanism and stereochemistry", "kind": "Video", "slug": "sn2-mechanism-and-stereochemistry"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/sn1-vs-sn2-solvent-effects/", "id": "ZRMSHG18aMY", "title": "Sn1 vs Sn2: Solvent effects", "kind": "Video", "slug": "sn1-vs-sn2-solvent-effects"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial/sn1-vs-sn2-summary/", "id": "cyZUgH4yoCo", "title": "Sn1 vs Sn2: Summary", "kind": "Video", "slug": "sn1-vs-sn2-summary"}], "in_knowledge_map": false, "description": "In this tutorial, Jay covers the definitions of nucleophile/electrophile, The Schwartz Rules (may the Schwartz be with you!), and the differences between SN1 and SN2 reactions.", "node_slug": "sn1-sn2-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial", "extended_slug": "science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-tutorial", "kind": "Topic", "slug": "sn1-sn2-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/", "id": "e1-e2-tutorial", "hide": false, "title": "E1 and E2 reactions", "child_data": [{"kind": "Video", "id": "1258882694"}, {"kind": "Video", "id": "1258786014"}, {"kind": "Video", "id": "1258999260"}, {"kind": "Video", "id": "1258149637"}, {"kind": "Video", "id": "1258298350"}, {"kind": "Video", "id": "1258921468"}, {"kind": "Video", "id": "1258933606"}, {"kind": "Video", "id": "1258925815"}], "children": [{"path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e1-elimination-mechanism/", "id": "28N_IRo9g4Y", "title": "E1 elimination: Mechanism", "kind": "Video", "slug": "e1-elimination-mechanism"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e1-elimination-regioselectivity-and-stereoselectivity/", "id": "qjZnIpZ-EcY", "title": "E1 elimination: Regioselectivity and stereoselectivity", "kind": "Video", "slug": "e1-elimination-regioselectivity-and-stereoselectivity"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/carbocations-and-rearrangements/", "id": "fv9h29ZChfI", "title": "Carbocations and rearrangements", "kind": "Video", "slug": "carbocations-and-rearrangements"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e2-elimination-mechanism/", "id": "YEEbMd2AGag", "title": "E2 elimination: Mechanism", "kind": "Video", "slug": "e2-elimination-mechanism"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e2-elimination-regioselectivity/", "id": "WLIwMlIdIxQ", "title": "E2 elimination: Regioselectivity", "kind": "Video", "slug": "e2-elimination-regioselectivity"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e2-elimination-stereoselectivity/", "id": "_oodhLhuD5U", "title": "E2 elimination: Stereoselectivity", "kind": "Video", "slug": "e2-elimination-stereoselectivity"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e2-elimination-stereospecificity/", "id": "ihXlnX3gJTU", "title": "E2 elimination: Stereospecificity", "kind": "Video", "slug": "e2-elimination-stereospecificity"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial/e2-elimination-substituted-cyclohexanes/", "id": "PP7T8vpT2KI", "title": "E2 elimination: Substituted cyclohexanes", "kind": "Video", "slug": "e2-elimination-substituted-cyclohexanes"}], "in_knowledge_map": false, "description": "In this tutorial, Jay covers the E1 elimination mechanism, carbocation rearrangements, and the details of the E2 elimination reaction.", "node_slug": "e1-e2-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial", "extended_slug": "science/organic-chemistry/substitution-elimination-reactions/e1-e2-tutorial", "kind": "Topic", "slug": "e1-e2-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-jay/", "id": "sn1-sn2-e1-e2-jay", "hide": false, "title": "Sn1/Sn2/E1/E2", "child_data": [{"kind": "Video", "id": "1258682830"}, {"kind": "Video", "id": "1258945673"}, {"kind": "Video", "id": "1259026446"}], "children": [{"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-jay/nucleophilicity-and-basicity/", "id": "Iit8p6xzfr8", "title": "Nucleophilicity and basicity", "kind": "Video", "description": "Correction: I forgot to draw a negative charge next to the first iodide anion.", "slug": "nucleophilicity-and-basicity"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-jay/sn1-sn2-e1-e2-reactions-primary-and-tertiary-alkyl-halides/", "id": "pzHEtjAUVtY", "title": "Sn1 Sn2 E1 E2 reactions: Primary and tertiary alkyl halides", "kind": "Video", "slug": "sn1-sn2-e1-e2-reactions-primary-and-tertiary-alkyl-halides"}, {"path": "khan/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-jay/sn1-sn2-e1-e2-reactions-secondary-alkyl-halides/", "id": "fwSGKbmuHFI", "title": "Sn1 Sn2 E1 E2 reactions: Secondary alkyl halides", "kind": "Video", "slug": "sn1-sn2-e1-e2-reactions-secondary-alkyl-halides"}], "in_knowledge_map": false, "description": "In this tutorial, Jay discusses the strength of a nucleophile and the differences between SN1, SN2, E1, and E2 reactions.", "node_slug": "sn1-sn2-e1-e2-jay", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-jay", "extended_slug": "science/organic-chemistry/substitution-elimination-reactions/sn1-sn2-e1-e2-jay", "kind": "Topic", "slug": "sn1-sn2-e1-e2-jay"}], "in_knowledge_map": false, "description": "SN1, SN2, E1, E2, nucleophiles, nucleophilicity, basicity", "node_slug": "substitution-elimination-reactions", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/substitution-elimination-reactions", "extended_slug": "science/organic-chemistry/substitution-elimination-reactions", "kind": "Topic", "slug": "substitution-elimination-reactions"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/alkenes-alkynes/", "id": "alkenes-alkynes", "hide": false, "title": "Alkenes and alkynes", "child_data": [{"kind": "Topic", "id": "xfe1ed955"}, {"kind": "Topic", "id": "x5d728e0b"}, {"kind": "Topic", "id": "x546d0737"}, {"kind": "Topic", "id": "x1a498bff"}, {"kind": "Topic", "id": "x81bb8c3d"}, {"kind": "Topic", "id": "x711e0019"}, {"kind": "Topic", "id": "x557231e4"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes/", "id": "naming-alkenes", "hide": false, "title": "Naming alkenes", "child_data": [{"kind": "Video", "id": "2600609"}, {"kind": "Video", "id": "2729"}, {"kind": "Video", "id": "2730"}], "children": [{"path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes/naming-alkenes-examples/", "id": "KWv5PaoHwPA", "title": "Naming alkenes examples", "kind": "Video", "description": "Naming Alkenes Examples", "slug": "naming-alkenes-examples"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes/cis-trans-and-e-z-naming-scheme-for-alkenes/", "id": "oYoQpDtBLac", "title": "cis-trans and E-Z naming scheme for alkenes", "kind": "Video", "description": "Cis-Trans and E-Z Naming Scheme for Alkenes", "slug": "cis-trans-and-e-z-naming-scheme-for-alkenes"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes/entgegen-zusammen-naming-scheme-for-alkenes-examples/", "id": "GFiizJ-jGVw", "title": "Entgegen-Zusammen naming scheme for alkenes examples", "kind": "Video", "description": "Entgegen-Zusammen Naming Scheme for Alkenes Examples", "slug": "entgegen-zusammen-naming-scheme-for-alkenes-examples"}], "in_knowledge_map": false, "description": "In this tutorial, Sal names alkenes and discusses the E-Z system.", "node_slug": "naming-alkenes", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alkenes-alkynes/naming-alkenes", "extended_slug": "science/organic-chemistry/alkenes-alkynes/naming-alkenes", "kind": "Topic", "slug": "naming-alkenes"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions/", "id": "alkene-reactions", "hide": false, "title": "Alkene reactions", "child_data": [{"kind": "Video", "id": "4802246"}, {"kind": "Video", "id": "4802247"}, {"kind": "Video", "id": "4481798"}, {"kind": "Video", "id": "4481799"}], "children": [{"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions/introduction-to-reaction-mechanisms/", "id": "Z_GWBW_GVGA", "title": "Introduction to reaction mechanisms", "kind": "Video", "description": "Introduction to Reaction Mechanisms . Addition reaction to an alkene", "slug": "introduction-to-reaction-mechanisms"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions/markovnikov-s-rule-and-carbocations/", "id": "X-VCk3WrGlM", "title": "Markovnikov's rule and carbocations", "kind": "Video", "description": "Markovnikov's Rule and Carbocations. Figuring out which addition reaction is more likely.", "slug": "markovnikov-s-rule-and-carbocations"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions/addition-of-water-acid-catalyzed-mechanism/", "id": "sEiQm7IzUg8", "title": "Addition of water (acid-catalyzed) mechanism", "kind": "Video", "description": "Addition of Water (Acid-Catalyzed) Mechanism", "slug": "addition-of-water-acid-catalyzed-mechanism"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions/polymerization-of-alkenes-with-acid/", "id": "tR-hzV5Tkxo", "title": "Polymerization of alkenes with acid", "kind": "Video", "description": "Polymerization of Alkenes with Acid", "slug": "polymerization-of-alkenes-with-acid"}], "in_knowledge_map": false, "description": "In this tutorial, Sal shows several reactions of alkenes.", "node_slug": "alkene-reactions", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alkenes-alkynes/alkene-reactions", "extended_slug": "science/organic-chemistry/alkenes-alkynes/alkene-reactions", "kind": "Topic", "slug": "alkene-reactions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes-jay/", "id": "naming-alkenes-jay", "hide": false, "title": "Alkene nomenclature", "child_data": [{"kind": "Video", "id": "1258861593"}, {"kind": "Video", "id": "1258968516"}, {"kind": "Video", "id": "x667d585d"}, {"kind": "Video", "id": "xb602b5af"}], "children": [{"path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes-jay/alkene-intro-and-stability/", "id": "kDOepUPGhFs", "title": "Alkene intro and stability", "kind": "Video", "slug": "alkene-intro-and-stability"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes-jay/alkene-nomenclature/", "id": "g1ZZIee9zk0", "title": "Alkene nomenclature", "kind": "Video", "slug": "alkene-nomenclature"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes-jay/cis-trans-isomerism/", "id": "JjtzMQDdyuM", "title": "Cis-trans isomerism", "kind": "Video", "description": "How to assign cis-trans terminology to double bonds", "slug": "cis-trans-isomerism"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/naming-alkenes-jay/e-z-system-new/", "id": "7He7goTp6BY", "title": "E-Z system", "kind": "Video", "description": "How to use the E-Z system to assign configurations to double bonds", "slug": "e-z-system-new"}], "in_knowledge_map": false, "description": "In this tutorial, Jay names alkenes, discusses the stability of alkenes, and introduces the E/Z system.", "node_slug": "naming-alkenes-jay", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alkenes-alkynes/naming-alkenes-jay", "extended_slug": "science/organic-chemistry/alkenes-alkynes/naming-alkenes-jay", "kind": "Topic", "slug": "naming-alkenes-jay"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/", "id": "alkene-reactions-tutorial", "hide": false, "title": "Alkene reactions", "child_data": [{"kind": "Video", "id": "1258433841"}, {"kind": "Video", "id": "1259066051"}, {"kind": "Video", "id": "1258968655"}, {"kind": "Video", "id": "xfe915027"}, {"kind": "Video", "id": "x1750b898"}, {"kind": "Video", "id": "1259000494"}, {"kind": "Video", "id": "1259028558"}, {"kind": "Video", "id": "1259063070"}, {"kind": "Video", "id": "1258968713"}, {"kind": "Video", "id": "xd84d8622"}], "children": [{"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/hydrogenation/", "id": "fSk1Crn3R2E", "title": "Hydrogenation", "kind": "Video", "slug": "hydrogenation"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/hydrohalogenation/", "id": "iEKA0jUstPs", "title": "Hydrohalogenation", "kind": "Video", "slug": "hydrohalogenation"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/hydration/", "id": "dJhxphep_gY", "title": "Hydration", "kind": "Video", "slug": "hydration"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/hydroboration-oxidation-regio-stereo/", "id": "b_qDLacdkFg", "title": "Hydroboration-oxidation", "kind": "Video", "slug": "hydroboration-oxidation-regio-stereo"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/hydroboration-oxidation-mechanism/", "id": "00qYQahwuSQ", "title": "Hydroboration-oxidation: mechanism", "kind": "Video", "slug": "hydroboration-oxidation-mechanism"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/halogenation/", "id": "Yiy84xYQ3es", "title": "Halogenation", "kind": "Video", "slug": "halogenation"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/halohydrin-formation/", "id": "FaOOx6IZxV8", "title": "Halohydrin formation", "kind": "Video", "slug": "halohydrin-formation"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/epoxide-formation-and-anti-dihydroxylation/", "id": "KfTosrMs5W0", "title": "Epoxide formation and anti dihydroxylation", "kind": "Video", "slug": "epoxide-formation-and-anti-dihydroxylation"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/syn-dihydroxylation/", "id": "76KtDSfWnkw", "title": "Syn dihydroxylation", "kind": "Video", "slug": "syn-dihydroxylation"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/ozonolysis-1/", "id": "bFj3HpdC4Uk", "title": "Ozonolysis", "kind": "Video", "description": "Alkene cleavage using ozone", "slug": "ozonolysis-1"}], "in_knowledge_map": false, "description": "In this tutorial, Jay explains the addition reactions of alkenes.", "node_slug": "alkene-reactions-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial", "extended_slug": "science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial", "kind": "Topic", "slug": "alkene-reactions-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alkenes-alkynes/naming-preparation-alkynes/", "id": "naming-preparation-alkynes", "hide": false, "title": "Naming and preparing alkynes", "child_data": [{"kind": "Video", "id": "1259049525"}, {"kind": "Video", "id": "1258994895"}, {"kind": "Video", "id": "1258920438"}], "children": [{"path": "khan/science/organic-chemistry/alkenes-alkynes/naming-preparation-alkynes/alkyne-nomenclature/", "id": "qZTeyhR1akA", "title": "Alkyne nomenclature", "kind": "Video", "slug": "alkyne-nomenclature"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/naming-preparation-alkynes/alkyne-acidity-and-alkylation/", "id": "_-I3HdmyYfE", "title": "Alkyne acidity and alkylation", "kind": "Video", "slug": "alkyne-acidity-and-alkylation"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/naming-preparation-alkynes/preparation-of-alkynes/", "id": "HbDWBeRJboE", "title": "Preparation of alkynes", "kind": "Video", "description": "Note that if a terminal alkyne is produced, the strong base will deprotonate the alkyne to form an alkynide anion. A proton source (like H2O) must be added to regenerate the terminal alkyne.", "slug": "preparation-of-alkynes"}], "in_knowledge_map": false, "description": "In this tutorial, Jay covers the nomenclature and preparation of alkynes, the acidity of terminal alkynes, and the alkylation of alkynes.", "node_slug": "naming-preparation-alkynes", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alkenes-alkynes/naming-preparation-alkynes", "extended_slug": "science/organic-chemistry/alkenes-alkynes/naming-preparation-alkynes", "kind": "Topic", "slug": "naming-preparation-alkynes"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/", "id": "alkyne-reactions", "hide": false, "title": "Alkyne reactions", "child_data": [{"kind": "Video", "id": "1259109290"}, {"kind": "Video", "id": "1259095280"}, {"kind": "Video", "id": "1258994911"}, {"kind": "Video", "id": "1259003454"}, {"kind": "Video", "id": "1259118223"}], "children": [{"path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/reduction-of-alkynes/", "id": "RdFfIEDxo18", "title": "Reduction of alkynes", "kind": "Video", "slug": "reduction-of-alkynes"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/hydrohalogenation-of-alkynes/", "id": "EbRxaBShveI", "title": "Hydrohalogenation of alkynes", "kind": "Video", "slug": "hydrohalogenation-of-alkynes"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/hydration-of-alkynes/", "id": "AE1pkp-_cKE", "title": "Hydration of alkynes", "kind": "Video", "slug": "hydration-of-alkynes"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/hydroboration-oxidation-of-alkynes/", "id": "3KrqQXsWP1M", "title": "Hydroboration-oxidation of alkynes", "kind": "Video", "slug": "hydroboration-oxidation-of-alkynes"}, {"path": "khan/science/organic-chemistry/alkenes-alkynes/alkyne-reactions/halogenation-and-ozonolysis-of-alkynes/", "id": "bEJxFs0f35o", "title": "Halogenation and ozonolysis of alkynes", "kind": "Video", "slug": "halogenation-and-ozonolysis-of-alkynes"}], "in_knowledge_map": false, "description": "In this tutorial, Jay shows the reactions of alkynes.", "node_slug": "alkyne-reactions", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alkenes-alkynes/alkyne-reactions", "extended_slug": "science/organic-chemistry/alkenes-alkynes/alkyne-reactions", "kind": "Topic", "slug": "alkyne-reactions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alkenes-alkynes/synthesis-alkynes/", "id": "synthesis-alkynes", "hide": false, "title": "Synthesis using alkynes", "child_data": [{"kind": "Video", "id": "1259119274"}], "children": [{"path": "khan/science/organic-chemistry/alkenes-alkynes/synthesis-alkynes/synthesis-using-alkynes/", "id": "Rc1CezZgggM", "title": "Synthesis using alkynes", "kind": "Video", "slug": "synthesis-using-alkynes"}], "in_knowledge_map": false, "description": "In this tutorial, Jay demonstrates how to use Dr. Schwartz's organic flowsheet to solve synthesis problems involving alkynes. Always remember, pain is temporary, orgo is forever!", "node_slug": "synthesis-alkynes", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alkenes-alkynes/synthesis-alkynes", "extended_slug": "science/organic-chemistry/alkenes-alkynes/synthesis-alkynes", "kind": "Topic", "slug": "synthesis-alkynes"}], "in_knowledge_map": false, "description": "naming alkenes and alkynes, reactions of alkenes and alkynes, synthesis", "node_slug": "alkenes-alkynes", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/alkenes-alkynes", "extended_slug": "science/organic-chemistry/alkenes-alkynes", "kind": "Topic", "slug": "alkenes-alkynes"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/", "id": "alcohols-ethers-epoxides-sulfides", "hide": false, "title": "Alcohols, ethers, epoxides, sulfides", "child_data": [{"kind": "Topic", "id": "x3693a07c"}, {"kind": "Topic", "id": "x01a90d78"}, {"kind": "Topic", "id": "xcea47819"}, {"kind": "Topic", "id": "x9099059d"}, {"kind": "Topic", "id": "xac961822"}, {"kind": "Topic", "id": "xae89457e"}, {"kind": "Topic", "id": "xe7251b21"}, {"kind": "Topic", "id": "xc5be8d3b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties/", "id": "alcohol-nomenclature-properties", "hide": false, "title": "Alcohol nomenclature and properties", "child_data": [{"kind": "Video", "id": "63"}, {"kind": "Video", "id": "x4184407a"}, {"kind": "Video", "id": "64"}, {"kind": "Video", "id": "1259122216"}, {"kind": "Video", "id": "1259103436"}], "children": [{"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties/alcohols/", "id": "nQ7QSV4JRSs", "title": "Alcohols", "kind": "Video", "description": "Naming alcohols", "slug": "alcohols"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties/triple-bond-linear/", "id": "LIFHYUGrYqw", "title": "Triple bonds cause linear configurations", "kind": "Video", "slug": "triple-bond-linear"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties/alcohol-properties/", "id": "Aa1CMokCch4", "title": "Alcohol properties", "kind": "Video", "description": "Alcohol Properties", "slug": "alcohol-properties"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties/alcohol-nomenclature/", "id": "kFpLDQfEg1E", "title": "Alcohol nomenclature", "kind": "Video", "slug": "alcohol-nomenclature"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties/physical-properties-of-alcohols-and-preparation-of-alkoxides/", "id": "t6qlbcdn_6k", "title": "Physical properties of alcohols and preparation of alkoxides", "kind": "Video", "slug": "physical-properties-of-alcohols-and-preparation-of-alkoxides"}], "in_knowledge_map": false, "description": "It can clean a wound or kill your liver. Some religions ban it, others use it in their sacred rites. Some of the most stupid acts humanity every committed were done under its influence. It is even responsible for some of our births. \n\nIn this tutorial, Sal and Jay name alcohols and discuss their properties.", "node_slug": "alcohol-nomenclature-properties", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties", "extended_slug": "science/organic-chemistry/alcohols-ethers-epoxides-sulfides/alcohol-nomenclature-properties", "kind": "Topic", "slug": "alcohol-nomenclature-properties"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-alcohols-tutorial/", "id": "synthesis-alcohols-tutorial", "hide": false, "title": "Synthesis of alcohols", "child_data": [{"kind": "Video", "id": "1259015283"}, {"kind": "Video", "id": "1258994969"}, {"kind": "Video", "id": "1259140328"}, {"kind": "Video", "id": "1259118288"}], "children": [{"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-alcohols-tutorial/preparation-of-alcohols-using-nabh4/", "id": "ad5e-jy-eqs", "title": "Preparation of alcohols using NaBH4", "kind": "Video", "slug": "preparation-of-alcohols-using-nabh4"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-alcohols-tutorial/preparation-of-alcohols-using-lialh4/", "id": "rNJPNlgmhbk", "title": "Preparation of alcohols using LiAlH4", "kind": "Video", "slug": "preparation-of-alcohols-using-lialh4"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-alcohols-tutorial/synthesis-of-alcohols-using-grignard-reagents-i/", "id": "itnwiwRpw4w", "title": "Synthesis of alcohols using Grignard reagents I", "kind": "Video", "slug": "synthesis-of-alcohols-using-grignard-reagents-i"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-alcohols-tutorial/synthesis-of-alcohols-using-grignard-reagents-ii/", "id": "DhwgNaRwscQ", "title": "Synthesis of alcohols using Grignard reagents II", "kind": "Video", "slug": "synthesis-of-alcohols-using-grignard-reagents-ii"}], "in_knowledge_map": false, "description": "In this tutorial, Jay shows how to synthesize alcohols using sodium borohydride, lithium aluminum hydride, and grignard reagents.", "node_slug": "synthesis-alcohols-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-alcohols-tutorial", "extended_slug": "science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-alcohols-tutorial", "kind": "Topic", "slug": "synthesis-alcohols-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/", "id": "reactions-alcohols-tutorial", "hide": false, "title": "Reactions of alcohols", "child_data": [{"kind": "Video", "id": "1259111574"}, {"kind": "Video", "id": "1258832576"}, {"kind": "Video", "id": "1426103770"}, {"kind": "Video", "id": "xec775fab"}, {"kind": "Video", "id": "xd69060c0"}, {"kind": "Video", "id": "xdd8cee30"}, {"kind": "Video", "id": "1259152103"}, {"kind": "Video", "id": "1323985482"}], "children": [{"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/oxidation-of-alcohols-i-mechanism-and-oxidation-states/", "id": "j-rBgs_p-bg", "title": "Oxidation of alcohols I: Mechanism and oxidation states", "kind": "Video", "slug": "oxidation-of-alcohols-i-mechanism-and-oxidation-states"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/oxidation-of-alcohols-ii-examples/", "id": "wvwLy9ifmX0", "title": "Oxidation of alcohols II: Examples", "kind": "Video", "slug": "oxidation-of-alcohols-ii-examples"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/biological-redox-reactions/", "id": "SJ3TKg_3PD8", "title": "Biological redox reactions", "kind": "Video", "slug": "biological-redox-reactions"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/protection-of-alcohols/", "id": "KsdZsWOsB84", "title": "Protection of alcohols", "kind": "Video", "description": "Questions pertaining to alcohols and phenols", "slug": "protection-of-alcohols"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/preparation-of-mesylates-and-tosylates/", "id": "rR0LdZ-PfBk", "title": "Preparation of mesylates and tosylates", "kind": "Video", "slug": "preparation-of-mesylates-and-tosylates"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/sn1-sn2-alcohols/", "id": "KPh60w6McPI", "title": "SN1 and SN2 reactions of alcohols", "kind": "Video", "slug": "sn1-sn2-alcohols"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/formation-of-nitrate-esters/", "id": "_yvdb_0NGT8", "title": "Formation of nitrate esters", "kind": "Video", "slug": "formation-of-nitrate-esters"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial/preparation-of-alkyl-halides-from-alcohols/", "id": "LccmkSz-Y-w", "title": "Preparation of alkyl halides from alcohols", "kind": "Video", "slug": "preparation-of-alkyl-halides-from-alcohols"}], "in_knowledge_map": false, "description": "In this tutorial, Jay assigns oxidation states to alcohols, shows an oxidation mechanism using the Jones reagent, shows the formation of nitrate esters from alcohols, and demonstrates how to make alkyl halides from alcohols. Biochemical redox reactions are also discussed.", "node_slug": "reactions-alcohols-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial", "extended_slug": "science/organic-chemistry/alcohols-ethers-epoxides-sulfides/reactions-alcohols-tutorial", "kind": "Topic", "slug": "reactions-alcohols-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-properties-ethers/", "id": "nomenclature-properties-ethers", "hide": false, "title": "Nomenclature and properties of ethers", "child_data": [{"kind": "Video", "id": "6022703"}, {"kind": "Video", "id": "1258962744"}, {"kind": "Video", "id": "1259101394"}], "children": [{"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-properties-ethers/ether-naming-and-introduction/", "id": "roUGDG1rhPI", "title": "Ether naming and introduction", "kind": "Video", "description": "Ether Naming and Introduction", "slug": "ether-naming-and-introduction"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-properties-ethers/ether-nomenclature/", "id": "gW8za1t2nFg", "title": "Ether nomenclature", "kind": "Video", "slug": "ether-nomenclature"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-properties-ethers/properties-of-ethers-and-crown-ethers/", "id": "UlJmX9SLGRw", "title": "Properties of ethers and crown ethers", "kind": "Video", "slug": "properties-of-ethers-and-crown-ethers"}], "in_knowledge_map": false, "description": "In this tutorial, Sal and Jay name ethers and discuss the physical properties of ethers.", "node_slug": "nomenclature-properties-ethers", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-properties-ethers", "extended_slug": "science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-properties-ethers", "kind": "Topic", "slug": "nomenclature-properties-ethers"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-cleavage-ethers/", "id": "synthesis-cleavage-ethers", "hide": false, "title": "Synthesis and cleavage of ethers", "child_data": [{"kind": "Video", "id": "1258839947"}, {"kind": "Video", "id": "1259076678"}], "children": [{"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-cleavage-ethers/williamson-ether-synthesis/", "id": "X9ypryY7hrQ", "title": "Williamson ether synthesis", "kind": "Video", "slug": "williamson-ether-synthesis"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-cleavage-ethers/acidic-cleavage-of-ethers/", "id": "1k6MUeM-pEo", "title": "Acidic cleavage of ethers", "kind": "Video", "slug": "acidic-cleavage-of-ethers"}], "in_knowledge_map": false, "description": "In this tutorial, Jay shows how to synthesize ethers using the Williamson ether synthesis and how to cleave an ether linkage using acid.", "node_slug": "synthesis-cleavage-ethers", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-cleavage-ethers", "extended_slug": "science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-cleavage-ethers", "kind": "Topic", "slug": "synthesis-cleavage-ethers"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-preparation-epoxides/", "id": "nomenclature-preparation-epoxides", "hide": false, "title": "Nomenclature and preparation of epoxides", "child_data": [{"kind": "Video", "id": "6022704"}, {"kind": "Video", "id": "1259001927"}, {"kind": "Video", "id": "1259155226"}], "children": [{"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-preparation-epoxides/cyclic-ethers-and-epoxide-naming/", "id": "5d63YMUxcS4", "title": "Cyclic ethers and epoxide naming", "kind": "Video", "description": "Cyclic ethers and epoxide naming", "slug": "cyclic-ethers-and-epoxide-naming"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-preparation-epoxides/nomenclature-and-preparation-of-epoxides/", "id": "zGO-MlsdmgU", "title": "Nomenclature and preparation of epoxides", "kind": "Video", "slug": "nomenclature-and-preparation-of-epoxides"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-preparation-epoxides/preparation-of-epoxides-stereochemistry/", "id": "E9fw0EU4wpA", "title": "Preparation of epoxides: Stereochemistry", "kind": "Video", "slug": "preparation-of-epoxides-stereochemistry"}], "in_knowledge_map": false, "description": "In this tutorial, Sal and Jay name epoxides. Jay also shows the preparation of epoxides and includes the stereochemistry of the reaction.", "node_slug": "nomenclature-preparation-epoxides", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-preparation-epoxides", "extended_slug": "science/organic-chemistry/alcohols-ethers-epoxides-sulfides/nomenclature-preparation-epoxides", "kind": "Topic", "slug": "nomenclature-preparation-epoxides"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/ring-opening-reactions-epoxides/", "id": "ring-opening-reactions-epoxides", "hide": false, "title": "Ring-opening reactions of epoxides", "child_data": [{"kind": "Video", "id": "1259130390"}, {"kind": "Video", "id": "1259152148"}], "children": [{"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/ring-opening-reactions-epoxides/ring-opening-reactions-of-epoxides-strong-nucleophiles/", "id": "rWfs1hyguaM", "title": "Ring-opening reactions of epoxides: Strong nucleophiles", "kind": "Video", "slug": "ring-opening-reactions-of-epoxides-strong-nucleophiles"}, {"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/ring-opening-reactions-epoxides/ring-opening-reactions-of-epoxides-acid-catalyzed/", "id": "NRsM8kXtT5s", "title": "Ring opening reactions of epoxides: Acid-catalyzed", "kind": "Video", "slug": "ring-opening-reactions-of-epoxides-acid-catalyzed"}], "in_knowledge_map": false, "description": "In this tutorial, Sal and Jay show the SN1 and SN2 ring opening reactions of epoxides.", "node_slug": "ring-opening-reactions-epoxides", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/ring-opening-reactions-epoxides", "extended_slug": "science/organic-chemistry/alcohols-ethers-epoxides-sulfides/ring-opening-reactions-epoxides", "kind": "Topic", "slug": "ring-opening-reactions-epoxides"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/thiols-sulfides/", "id": "thiols-sulfides", "hide": false, "title": "Thiols and sulfides", "child_data": [{"kind": "Video", "id": "1258832595"}], "children": [{"path": "khan/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/thiols-sulfides/preparation-of-sulfides/", "id": "MC8Mc6tSjYI", "title": "Preparation of sulfides", "kind": "Video", "slug": "preparation-of-sulfides"}], "in_knowledge_map": false, "description": "In this tutorial, Jay shows how to prepare sulfides from thiols.", "node_slug": "thiols-sulfides", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/thiols-sulfides", "extended_slug": "science/organic-chemistry/alcohols-ethers-epoxides-sulfides/thiols-sulfides", "kind": "Topic", "slug": "thiols-sulfides"}], "in_knowledge_map": false, "description": "alcohols, ethers, epoxides, thiols, sulfides", "node_slug": "alcohols-ethers-epoxides-sulfides", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/alcohols-ethers-epoxides-sulfides", "extended_slug": "science/organic-chemistry/alcohols-ethers-epoxides-sulfides", "kind": "Topic", "slug": "alcohols-ethers-epoxides-sulfides"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/", "id": "conjugation-diels-alder-mo-theory", "hide": false, "title": "Conjugated systems and pericyclic reactions", "child_data": [{"kind": "Topic", "id": "x0548dd1a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/", "id": "diels-alder-reaction", "hide": false, "title": "Diels-Alder reaction", "child_data": [{"kind": "Video", "id": "x23276354"}, {"kind": "Video", "id": "x84b7ae39"}, {"kind": "Video", "id": "x9ce36256"}, {"kind": "Video", "id": "xbd52ef09"}, {"kind": "Video", "id": "x449f1a42"}, {"kind": "Video", "id": "x210a461f"}], "children": [{"path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-reaction-new/", "id": "9Ng6Zv9oLzk", "title": "Diels-Alder reaction", "kind": "Video", "description": "How to draw the products for a Diels-Alder reaction", "slug": "diels-alder-reaction-new"}, {"path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-stereochemistry-of-dienophile/", "id": "vXESvgGbSiw", "title": "Diels-Alder: stereochemistry of dienophile", "kind": "Video", "description": "How to analyze the stereochemistry of the dienophile in a Diels-Alder reaction", "slug": "diels-alder-stereochemistry-of-dienophile"}, {"path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-stereochemistry-of-diene-new/", "id": "CbgWfnqLJI0", "title": "Diels-Alder: stereochemistry of diene", "kind": "Video", "description": "How to analyze the stereochemistry of the diene in a Diels-Alder reaction", "slug": "diels-alder-stereochemistry-of-diene-new"}, {"path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-endo-rule-new/", "id": "jXanAqj_BVA", "title": "Diels-Alder: endo rule", "kind": "Video", "description": "How to draw the endo product for a Diels-Alder reaction", "slug": "diels-alder-endo-rule-new"}, {"path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-intramolecular-new/", "id": "SrrcBWllLbI", "title": "Diels-Alder: intramolecular", "kind": "Video", "description": "How to analyze the product of an intramolecular Diels-Alder reaction", "slug": "diels-alder-intramolecular-new"}, {"path": "khan/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction/diels-alder-regiochemistry-new/", "id": "aP-IPzDzasM", "title": "Diels-Alder: regiochemistry", "kind": "Video", "description": "How to determine the regiochemical product of a Diels-Alder reaction", "slug": "diels-alder-regiochemistry-new"}], "in_knowledge_map": false, "description": "What\u2019s the big deal? Actually, the Diels-Alder reaction is a very big \u201cdiel\u201d because it is commonly used in organic synthesis. Learn how to \u201cdiel\u201d with this classic reaction in this tutorial.", "node_slug": "diels-alder-reaction", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction", "extended_slug": "science/organic-chemistry/conjugation-diels-alder-mo-theory/diels-alder-reaction", "kind": "Topic", "slug": "diels-alder-reaction"}], "in_knowledge_map": false, "description": "Conjugation (eventually), addition reactions of conjugated dienes (eventually), Diels-Alder reaction, electrocyclic reactions (eventually)", "node_slug": "conjugation-diels-alder-mo-theory", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/conjugation-diels-alder-mo-theory", "extended_slug": "science/organic-chemistry/conjugation-diels-alder-mo-theory", "kind": "Topic", "slug": "conjugation-diels-alder-mo-theory"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/aromatic-compounds/", "id": "aromatic-compounds", "hide": false, "title": "Aromatic compounds", "child_data": [{"kind": "Topic", "id": "x27847dce"}, {"kind": "Topic", "id": "x120875e1"}, {"kind": "Topic", "id": "xd6b60133"}, {"kind": "Topic", "id": "xbe0dda5a"}, {"kind": "Topic", "id": "xd6798616"}, {"kind": "Topic", "id": "x0cc3ca29"}, {"kind": "Topic", "id": "x5f03e23e"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/aromatic-compounds/naming-aromatic/", "id": "naming-aromatic", "hide": false, "title": "Naming benzene derivatives", "child_data": [{"kind": "Video", "id": "6022712"}, {"kind": "Video", "id": "1366475654"}], "children": [{"path": "khan/science/organic-chemistry/aromatic-compounds/naming-aromatic/naming-benzene-derivatives-introduction/", "id": "A5r7wkwDID4", "title": "Naming benzene derivatives introduction", "kind": "Video", "description": "Naming Benzene Derivatives Introduction", "slug": "naming-benzene-derivatives-introduction"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/naming-aromatic/naming-benzene-derivatives/", "id": "8iwauKeqm2w", "title": "Naming benzene derivatives", "kind": "Video", "slug": "naming-benzene-derivatives"}], "in_knowledge_map": false, "description": "Would a cyclohexatriene by any other name smell as sweet? In this tutorial, Sal and Jay explain how to name benzene derivatives, the sometimes sweet-smelling cyclic molecules that can be used in the synthesis of explosives and plastics.", "node_slug": "naming-aromatic", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/aromatic-compounds/naming-aromatic", "extended_slug": "science/organic-chemistry/aromatic-compounds/naming-aromatic", "kind": "Topic", "slug": "naming-aromatic"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/aromatic-compounds/reactions-benzene/", "id": "reactions-benzene", "hide": false, "title": "Reactions of benzene", "child_data": [{"kind": "Video", "id": "6022702"}, {"kind": "Video", "id": "6022713"}, {"kind": "Video", "id": "6022714"}, {"kind": "Video", "id": "6022767"}, {"kind": "Video", "id": "6022768"}], "children": [{"path": "khan/science/organic-chemistry/aromatic-compounds/reactions-benzene/resonance/", "id": "6XOm3Km7r30", "title": "Resonance", "kind": "Video", "description": "Resonance in benzene and the carbonate ion", "slug": "resonance"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/reactions-benzene/electrophilic-aromatic-substitution/", "id": "fpq0eICjuSI", "title": "Electrophilic aromatic substitution", "kind": "Video", "description": "Electrophilic Aromatic Substitution", "slug": "electrophilic-aromatic-substitution"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/reactions-benzene/bromination-of-benzene/", "id": "K2tIixiXGOM", "title": "Bromination of benzene", "kind": "Video", "description": "Bromination of benzene catalyzed by iron bromide", "slug": "bromination-of-benzene"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/reactions-benzene/friedel-crafts-acylation/", "id": "vFfriC55fFw", "title": "Friedel crafts acylation", "kind": "Video", "description": "Friedel Crafts Acylation", "slug": "friedel-crafts-acylation"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/reactions-benzene/friedel-crafts-acylation-addendum/", "id": "0YD5xSvseIw", "title": "Friedel crafts acylation addendum", "kind": "Video", "description": "Friedel Crafts Acylation Addendum", "slug": "friedel-crafts-acylation-addendum"}], "in_knowledge_map": false, "description": "In this tutorial, Sal shows the mechanism of Electrophilic Aromatic Substitution and the reactions of bromination and Friedel-Crafts Acylation.", "node_slug": "reactions-benzene", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/aromatic-compounds/reactions-benzene", "extended_slug": "science/organic-chemistry/aromatic-compounds/reactions-benzene", "kind": "Topic", "slug": "reactions-benzene"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/", "id": "aromatic-stability", "hide": false, "title": "Aromatic stability", "child_data": [{"kind": "Video", "id": "x8ab13dd8"}, {"kind": "Video", "id": "1384499538"}, {"kind": "Video", "id": "1404889056"}, {"kind": "Video", "id": "1404562000"}, {"kind": "Video", "id": "1425619777"}, {"kind": "Video", "id": "xdddee18a"}, {"kind": "Video", "id": "xc08355a0"}], "children": [{"path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-stability-i/", "id": "oDigu9YxXUg", "title": "Aromatic stability I", "kind": "Video", "description": "The aromaticity of benzene", "slug": "aromatic-stability-i"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-stability-ii/", "id": "I6wzan4hNc4", "title": "Aromatic stability II", "kind": "Video", "slug": "aromatic-stability-ii"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-stability-iii/", "id": "yg0XJWHPqOA", "title": "Aromatic stability III", "kind": "Video", "slug": "aromatic-stability-iii"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-stability-iv/", "id": "BNmOZO9hbb0", "title": "Aromatic stability IV", "kind": "Video", "slug": "aromatic-stability-iv"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-stability-v/", "id": "sMrm4g6Aj4Y", "title": "Aromatic stability V", "kind": "Video", "slug": "aromatic-stability-v"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-heterocycles-i/", "id": "vAW9t5uBr08", "title": "Aromatic heterocycles I", "kind": "Video", "description": "The aromaticity of pyridine and pyrimidine.", "slug": "aromatic-heterocycles-i"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/aromatic-stability/aromatic-heterocycles-ii/", "id": "wvVdgGTrh-o", "title": "Aromatic heterocycles II", "kind": "Video", "description": "The aromaticity of pyrrole, imidazole, and thiophene.", "slug": "aromatic-heterocycles-ii"}], "in_knowledge_map": false, "description": "In this tutorial, Sal and Jay explain the concept of aromatic stabilization and show how to determine if a compound or an ion exhibits aromaticity. Knowledge of MO theory is assumed.", "node_slug": "aromatic-stability", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/aromatic-compounds/aromatic-stability", "extended_slug": "science/organic-chemistry/aromatic-compounds/aromatic-stability", "kind": "Topic", "slug": "aromatic-stability"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/", "id": "electrophilic-aromatic-substitution", "hide": false, "title": "Electrophilic aromatic substitution", "child_data": [{"kind": "Video", "id": "xe5146e69"}, {"kind": "Video", "id": "x6d328f7c"}, {"kind": "Video", "id": "x4eb7624c"}, {"kind": "Video", "id": "xcc11fbe4"}, {"kind": "Video", "id": "xf23a2385"}, {"kind": "Video", "id": "x50801d9e"}], "children": [{"path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/electrophilic-aromatic-substitution-mechanism/", "id": "eQzbpL0uWVA", "title": "Electrophilic aromatic substitution mechanism", "kind": "Video", "description": "The general reaction and mechanism of Electrophilic Aromatic Substitution", "slug": "electrophilic-aromatic-substitution-mechanism"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/halogenation-of-benzene-1/", "id": "3cVSSiuiwsQ", "title": "Halogenation", "kind": "Video", "description": "The halogenation of benzene", "slug": "halogenation-of-benzene-1"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/nitration/", "id": "rC165FcI4Yg", "title": "Nitration", "kind": "Video", "description": "Nitration of Benzene to form Nitrobenzene", "slug": "nitration"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/sulfonation-benzene/", "id": "aKeDUvpfOfI", "title": "Sulfonation", "kind": "Video", "description": "Sulfonation of benzene", "slug": "sulfonation-benzene"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/friedel-crafts-alkylation/", "id": "FHptu3tcJnM", "title": "Friedel-Crafts alkylation", "kind": "Video", "description": "The mechanism of alkylation", "slug": "friedel-crafts-alkylation"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution/friedel-crafts-acylation-1/", "id": "xUFwzPmqt0Y", "title": "Friedel-Crafts acylation", "kind": "Video", "description": "The mechanism of acylation", "slug": "friedel-crafts-acylation-1"}], "in_knowledge_map": false, "description": "In this tutorial, Jay shows several electrophilic aromatic substitution reactions.", "node_slug": "electrophilic-aromatic-substitution", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution", "extended_slug": "science/organic-chemistry/aromatic-compounds/electrophilic-aromatic-substitution", "kind": "Topic", "slug": "electrophilic-aromatic-substitution"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/", "id": "deffect-2013-07-03T14:44:54.851Z", "hide": false, "title": "Directing effects", "child_data": [{"kind": "Video", "id": "xf77ea11d"}, {"kind": "Video", "id": "x3b0b9f0c"}, {"kind": "Video", "id": "x7903db86"}, {"kind": "Video", "id": "x096c0436"}, {"kind": "Video", "id": "x45932a90"}, {"kind": "Video", "id": "xef0a18eb"}], "children": [{"path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/ortho-para-directors-i/", "id": "i9rfWOAEplk", "title": "Ortho-para directors I", "kind": "Video", "description": "Regiochemistry", "slug": "ortho-para-directors-i"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/ortho-para-directors-ii/", "id": "KM_maukQebY", "title": "Ortho-para directors II", "kind": "Video", "description": "Strong Activators", "slug": "ortho-para-directors-ii"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/ortho-para-directors-iii/", "id": "SFd8mcpP3TU", "title": "Ortho-para directors III", "kind": "Video", "description": "Moderate and weak activation, weak deactivation", "slug": "ortho-para-directors-iii"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/meta-directors-i/", "id": "c547u94QRFU", "title": "Meta directors I", "kind": "Video", "description": "Regiochemistry", "slug": "meta-directors-i"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/meta-directors-ii/", "id": "XUT7zEffaTY", "title": "Meta directors II", "kind": "Video", "description": "Inductive and Resonance effects", "slug": "meta-directors-ii"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03t144454851z/multiple-substituents/", "id": "iF-f2-KSw6E", "title": "Multiple substituents", "kind": "Video", "description": "The directing effects of substituents on a benzene ring", "slug": "multiple-substituents"}], "in_knowledge_map": false, "description": "In this tutorial, Jay shows you the directing effects of substituents on a benzene ring. Knowledge of Electrophilic Aromatic Substitution reactions is assumed.", "node_slug": "deffect-2013-07-03T14:44:54.851Z", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/aromatic-compounds/deffect-2013-07-03T14:44:54.851Z", "extended_slug": "science/organic-chemistry/aromatic-compounds/deffect-2013-07-03T14:44:54.851Z", "kind": "Topic", "slug": "deffect-2013-07-03t144454851z"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis/", "id": "other-reactions-and-synthesis", "hide": false, "title": "Other reactions and synthesis", "child_data": [{"kind": "Video", "id": "x4e04fccf"}, {"kind": "Video", "id": "x33a50c3d"}, {"kind": "Video", "id": "x739b5ccc"}, {"kind": "Video", "id": "x91dfd8db"}, {"kind": "Video", "id": "xf49d2591"}], "children": [{"path": "khan/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis/birch-reduction-i/", "id": "p4M2q1t_Up8", "title": "Birch reduction I", "kind": "Video", "description": "The mechanism of the Birch Reduction", "slug": "birch-reduction-i"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis/birch-reduction-ii/", "id": "dzjkh9K5Y8o", "title": "Birch reduction II", "kind": "Video", "description": "The effect of electron-withdrawing and electron-donating groups", "slug": "birch-reduction-ii"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis/reactions-at-the-benzylic-position/", "id": "GonTjrX5PjA", "title": "Reactions at the benzylic position", "kind": "Video", "description": "Free radical bromination, nucleophilic substitution, oxidation", "slug": "reactions-at-the-benzylic-position"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis/synthesis-of-substituted-benzene-rings-i/", "id": "K4RE-6AolEw", "title": "Synthesis of substituted benzene rings I", "kind": "Video", "description": "Synthesis practice problems", "slug": "synthesis-of-substituted-benzene-rings-i"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis/synthesis-of-substituted-benzene-rings-ii/", "id": "b9NZvAhvIwQ", "title": "Synthesis of substituted benzene rings II", "kind": "Video", "description": "Synthesis practice problems", "slug": "synthesis-of-substituted-benzene-rings-ii"}], "in_knowledge_map": false, "description": "In this tutorial, Jay covers a few more reactions of benzene derivatives and also shows how to approach the synthesis of substituted benzene rings.", "node_slug": "other-reactions-and-synthesis", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis", "extended_slug": "science/organic-chemistry/aromatic-compounds/other-reactions-and-synthesis", "kind": "Topic", "slug": "other-reactions-and-synthesis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/aromatic-compounds/nucleophilic-aromatic-substitution/", "id": "nucleophilic-aromatic-substitution", "hide": false, "title": "Nucleophilic aromatic substitution", "child_data": [{"kind": "Video", "id": "xae46f3e4"}, {"kind": "Video", "id": "xe0a21ce8"}], "children": [{"path": "khan/science/organic-chemistry/aromatic-compounds/nucleophilic-aromatic-substitution/nucleophilic-aromatic-substitution-i/", "id": "6xy02bQS2Zg", "title": "Nucleophilic aromatic substitution I", "kind": "Video", "description": "The addition-elimination mechanism", "slug": "nucleophilic-aromatic-substitution-i"}, {"path": "khan/science/organic-chemistry/aromatic-compounds/nucleophilic-aromatic-substitution/nucleophilic-aromatic-substitution-ii/", "id": "mMHOM2qaRaE", "title": "Nucleophilic aromatic substitution II", "kind": "Video", "description": "The elimination-addition mechanism", "slug": "nucleophilic-aromatic-substitution-ii"}], "in_knowledge_map": false, "description": "In this tutorial, Jay shows the addition-elimination mechanism and the elimination-addition mechanism.", "node_slug": "nucleophilic-aromatic-substitution", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/aromatic-compounds/nucleophilic-aromatic-substitution", "extended_slug": "science/organic-chemistry/aromatic-compounds/nucleophilic-aromatic-substitution", "kind": "Topic", "slug": "nucleophilic-aromatic-substitution"}], "in_knowledge_map": false, "description": "aromatic compounds, naming derivatives of benzene, electrophilic aromatic substitution reactions", "node_slug": "aromatic-compounds", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/aromatic-compounds", "extended_slug": "science/organic-chemistry/aromatic-compounds", "kind": "Topic", "slug": "aromatic-compounds"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/aldehydes-ketones/", "id": "aldehydes-ketones", "hide": false, "title": "Aldehydes and ketones", "child_data": [{"kind": "Topic", "id": "x39e355dc"}, {"kind": "Topic", "id": "xe295d4d7"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/aldehydes-ketones/nomenclature-aldehyde-ketone/", "id": "nomenclature-aldehyde-ketone", "hide": false, "title": "Introduction to aldehydes and ketones", "child_data": [{"kind": "Video", "id": "6022765"}, {"kind": "Video", "id": "6022766"}, {"kind": "Video", "id": "xe80d8a0e"}, {"kind": "Video", "id": "x9e2c8f29"}, {"kind": "Video", "id": "x9ddc232e"}], "children": [{"path": "khan/science/organic-chemistry/aldehydes-ketones/nomenclature-aldehyde-ketone/aldehyde-introduction/", "id": "oeyBfrx5RJY", "title": "Aldehyde introduction", "kind": "Video", "description": "Aldehyde introduction", "slug": "aldehyde-introduction"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/nomenclature-aldehyde-ketone/ketone-naming/", "id": "wD15pD5pCt4", "title": "Ketone naming", "kind": "Video", "description": "Ketone Naming", "slug": "ketone-naming"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/nomenclature-aldehyde-ketone/nomenclature-of-aldehydes-and-ketones/", "id": "JMsqu236bZo", "title": "Nomenclature of aldehydes and ketones", "kind": "Video", "slug": "nomenclature-of-aldehydes-and-ketones"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/nomenclature-aldehyde-ketone/physical-properties-of-aldehydes-and-ketones/", "id": "4lbVBMLZ1jQ", "title": "Physical properties of aldehydes and ketones", "kind": "Video", "slug": "physical-properties-of-aldehydes-and-ketones"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/nomenclature-aldehyde-ketone/reactivity-of-aldehydes-and-ketones/", "id": "BlBQBOb0OQ4", "title": "Reactivity of aldehydes and ketones", "kind": "Video", "slug": "reactivity-of-aldehydes-and-ketones"}], "in_knowledge_map": false, "description": "In this tutorial, Sal and Jay show you the nomenclature, physical properties, and reactivity of aldehydes and ketones.", "node_slug": "nomenclature-aldehyde-ketone", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/aldehydes-ketones/nomenclature-aldehyde-ketone", "extended_slug": "science/organic-chemistry/aldehydes-ketones/nomenclature-aldehyde-ketone", "kind": "Topic", "slug": "nomenclature-aldehyde-ketone"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/", "id": "reactions-aldehydes-ketones-jay", "hide": false, "title": "Reactions of aldehydes and ketones", "child_data": [{"kind": "Video", "id": "xbc22ce4f"}, {"kind": "Video", "id": "x9477eb73"}, {"kind": "Video", "id": "x5f7d086c"}, {"kind": "Video", "id": "x7327d20a"}, {"kind": "Video", "id": "x49f0789d"}, {"kind": "Video", "id": "xcac5c01c"}, {"kind": "Video", "id": "xb3f287ad"}, {"kind": "Video", "id": "x18386c36"}, {"kind": "Video", "id": "xb08f7f0a"}, {"kind": "Video", "id": "xd9c3a4be"}], "children": [{"path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/formation-of-hydrates/", "id": "632MAqIB14E", "title": "Formation of hydrates", "kind": "Video", "slug": "formation-of-hydrates"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/formation-of-hemiacetals/", "id": "FGq9-R6Yw18", "title": "Formation of hemiacetals", "kind": "Video", "slug": "formation-of-hemiacetals"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/acid-and-base-catalyzed-formation-of-hydrates-and-hemiacetals/", "id": "rL0lDESwwv8", "title": "Acid and base catalyzed formation of hydrates and hemiacetals", "kind": "Video", "slug": "acid-and-base-catalyzed-formation-of-hydrates-and-hemiacetals"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/formation-of-acetals/", "id": "8-ccnvn9DxI", "title": "Formation of acetals", "kind": "Video", "slug": "formation-of-acetals"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/acetals-as-protecting-groups-and-thioacetals/", "id": "fY_ejjMRYg0", "title": "Acetals as protecting groups and thioacetals", "kind": "Video", "slug": "acetals-as-protecting-groups-and-thioacetals"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/formation-of-imines-and-enamines/", "id": "Gl7bQNm92fE", "title": "Formation of imines and enamines", "kind": "Video", "slug": "formation-of-imines-and-enamines"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/formation-of-oximes-and-hydrazones/", "id": "gSzxeL64Cn0", "title": "Formation of oximes and hydrazones", "kind": "Video", "slug": "formation-of-oximes-and-hydrazones"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/addition-of-carbon-nucleophiles-to-aldehydes-and-ketones/", "id": "D5-1qEKtfQ4", "title": "Addition of carbon nucleophiles to aldehydes and ketones", "kind": "Video", "slug": "addition-of-carbon-nucleophiles-to-aldehydes-and-ketones"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/formation-of-alcohols-using-hydride-reducing-agents/", "id": "uWJRx-5n1yw", "title": "Formation of alcohols using hydride reducing agents", "kind": "Video", "slug": "formation-of-alcohols-using-hydride-reducing-agents"}, {"path": "khan/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay/oxidation-of-aldehydes-using-tollens-reagent/", "id": "_0TqG8-N8DI", "title": "Oxidation of aldehydes using Tollens' reagent", "kind": "Video", "slug": "oxidation-of-aldehydes-using-tollens-reagent"}], "in_knowledge_map": false, "description": "In this tutorial, Jay shows you how to predict the products of the reactions of aldehydes and ketones.", "node_slug": "reactions-aldehydes-ketones-jay", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay", "extended_slug": "science/organic-chemistry/aldehydes-ketones/reactions-aldehydes-ketones-jay", "kind": "Topic", "slug": "reactions-aldehydes-ketones-jay"}], "in_knowledge_map": false, "description": "nomenclature and reactions of aldehydes and ketones", "node_slug": "aldehydes-ketones", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/aldehydes-ketones", "extended_slug": "science/organic-chemistry/aldehydes-ketones", "kind": "Topic", "slug": "aldehydes-ketones"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/", "id": "carboxylic-acids-derivatives", "hide": false, "title": "Carboxylic acids and derivatives", "child_data": [{"kind": "Topic", "id": "x1e9a4477"}, {"kind": "Topic", "id": "xf50b3adf"}, {"kind": "Topic", "id": "xa090d3d1"}, {"kind": "Topic", "id": "x19740462"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/naming-carboxylic-acids-sal/", "id": "naming-carboxylic-acids-sal", "hide": false, "title": "Naming carboxylic acids", "child_data": [{"kind": "Video", "id": "6022770"}, {"kind": "Video", "id": "6022771"}], "children": [{"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/naming-carboxylic-acids-sal/carboxlic-acid-introduction/", "id": "xheOq0XZ-so", "title": "Carboxylic acid introduction", "kind": "Video", "description": "Carboxylic Acid Introduction", "slug": "carboxlic-acid-introduction"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/naming-carboxylic-acids-sal/carboxylic-acid-naming/", "id": "z8h7QgevqjM", "title": "Carboxylic acid naming", "kind": "Video", "description": "Carboxylic Acid Naming", "slug": "carboxylic-acid-naming"}], "in_knowledge_map": false, "description": "In this tutorial, Sal shows how to name carboxylic acids.", "node_slug": "naming-carboxylic-acids-sal", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/carboxylic-acids-derivatives/naming-carboxylic-acids-sal", "extended_slug": "science/organic-chemistry/carboxylic-acids-derivatives/naming-carboxylic-acids-sal", "kind": "Topic", "slug": "naming-carboxylic-acids-sal"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/formation-carboxylic-acid-derivatives-sal/", "id": "formation-carboxylic-acid-derivatives-sal", "hide": false, "title": "Formation of carboxylic acid derivatives", "child_data": [{"kind": "Video", "id": "6022772"}, {"kind": "Video", "id": "6022773"}, {"kind": "Video", "id": "6022774"}, {"kind": "Video", "id": "6022775"}, {"kind": "Video", "id": "6022776"}], "children": [{"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/formation-carboxylic-acid-derivatives-sal/fisher-esterification/", "id": "dbdVMThH1n8", "title": "Fischer esterification", "kind": "Video", "description": "Fischer Esterification of Carboxylic Acids", "slug": "fisher-esterification"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/formation-carboxylic-acid-derivatives-sal/acid-chloride-formation/", "id": "XKk9K5xTgDA", "title": "Acid chloride formation", "kind": "Video", "description": "Acetic Acid to Acetyl Chloride mechanism. Can be generalized to forming any acid halide from a carboxylic acid", "slug": "acid-chloride-formation"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/formation-carboxylic-acid-derivatives-sal/amides-anhydrides-esters-and-acyl-chlorides/", "id": "SRPQ62dR6b4", "title": "Amides, anhydrides, esters, and acyl chlorides", "kind": "Video", "description": "Carboxylic Acid Derivatives - Amides, Anhydrides, Esters and Acyl Chlorides", "slug": "amides-anhydrides-esters-and-acyl-chlorides"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/formation-carboxylic-acid-derivatives-sal/relative-stability-of-amides-esters-anhydrides-and-acyl-chlorides/", "id": "NYI0bJK64MY", "title": "Relative stability of amides, esters, anhydrides, and acyl chlorides", "kind": "Video", "description": "Relative Stability of Amides Esters Anhydrides and Acyl Chlorides", "slug": "relative-stability-of-amides-esters-anhydrides-and-acyl-chlorides"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/formation-carboxylic-acid-derivatives-sal/amide-formation-from-acyl-chloride/", "id": "gMKtGulgGH8", "title": "Amide formation from acyl chloride", "kind": "Video", "description": "Amide Formation from Acyl Chloride", "slug": "amide-formation-from-acyl-chloride"}], "in_knowledge_map": false, "description": "In this tutorial, Sal shows the formation of carboxylic acid derivatives including esters, acyl chlorides, and amides.", "node_slug": "formation-carboxylic-acid-derivatives-sal", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/carboxylic-acids-derivatives/formation-carboxylic-acid-derivatives-sal", "extended_slug": "science/organic-chemistry/carboxylic-acids-derivatives/formation-carboxylic-acid-derivatives-sal", "kind": "Topic", "slug": "formation-carboxylic-acid-derivatives-sal"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/reactions-carboxylic-jay/", "id": "reactions-carboxylic-jay", "hide": false, "title": "Nomenclature and reactions of carboxylic acids", "child_data": [{"kind": "Video", "id": "x88ae23a9"}, {"kind": "Video", "id": "x7c382d2e"}, {"kind": "Video", "id": "x63b9f13f"}, {"kind": "Video", "id": "x88af37b3"}, {"kind": "Video", "id": "x06fa08f9"}, {"kind": "Video", "id": "x04b07e8a"}, {"kind": "Video", "id": "x20b158db"}], "children": [{"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/reactions-carboxylic-jay/carboxylic-acid-nomenclature-and-properties/", "id": "xgDuzj51tAc", "title": "Carboxylic acid nomenclature and properties", "kind": "Video", "description": "Naming carboxylic acids and analyzing their physical properties", "slug": "carboxylic-acid-nomenclature-and-properties"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/reactions-carboxylic-jay/reduction-of-carboxylic-acids/", "id": "zR4OaoiNkA0", "title": "Reduction of carboxylic acids", "kind": "Video", "description": "How to reduce carboxylic acids using lithium aluminum hydride (and borane)", "slug": "reduction-of-carboxylic-acids"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/reactions-carboxylic-jay/preparation-of-acyl-acid-chlorides/", "id": "5_4xmCLmtb8", "title": "Preparation of acyl (acid) chlorides", "kind": "Video", "description": "How to prepare acyl (acid) chlorides using thionyl chloride", "slug": "preparation-of-acyl-acid-chlorides"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/reactions-carboxylic-jay/preparation-of-acid-anhydrides/", "id": "9K3R6xtO6SU", "title": "Preparation of acid anhydrides", "kind": "Video", "description": "How to prepare acid anhydrides from carboxylic acids", "slug": "preparation-of-acid-anhydrides"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/reactions-carboxylic-jay/preparation-of-esters-via-fischer-esterification/", "id": "ynBuPEmcjp4", "title": "Preparation of esters via Fischer esterification", "kind": "Video", "description": "How to draw the mechanism for a Fischer esterification", "slug": "preparation-of-esters-via-fischer-esterification"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/reactions-carboxylic-jay/preparation-of-amides-using-dcc/", "id": "CafRuKs7EfE", "title": "Preparation of amides using DCC", "kind": "Video", "description": "The mechanism for the formation of amides from carboxylic acids and amines using dicyclohexylcarbodiimide (DCC)", "slug": "preparation-of-amides-using-dcc"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/reactions-carboxylic-jay/decarboxylation/", "id": "8G0RkfeKfBg", "title": "Decarboxylation", "kind": "Video", "description": "The decarboxylation (loss of carbon dioxide) of malonic acid and a beta-keto acid", "slug": "decarboxylation"}], "in_knowledge_map": false, "description": "In this tutorial, Jay shows you how to name carboxylic acids and the products of different reactions of carboxylic acids.", "node_slug": "reactions-carboxylic-jay", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/carboxylic-acids-derivatives/reactions-carboxylic-jay", "extended_slug": "science/organic-chemistry/carboxylic-acids-derivatives/reactions-carboxylic-jay", "kind": "Topic", "slug": "reactions-carboxylic-jay"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay/", "id": "acid-derivatives-jay", "hide": false, "title": "Nomenclature and reactions of carboxylic acid derivatives", "child_data": [{"kind": "Video", "id": "x82838180"}, {"kind": "Video", "id": "xa43e7ac2"}, {"kind": "Video", "id": "x17a27dc5"}, {"kind": "Video", "id": "x7b77a874"}, {"kind": "Video", "id": "xca8961e4"}, {"kind": "Video", "id": "xef274335"}, {"kind": "Video", "id": "xc8267955"}, {"kind": "Video", "id": "x510b73fe"}], "children": [{"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay/nomenclature-and-properties-of-acyl-acid-halides-and-acid-anhydrides/", "id": "uaXgGL1dGfU", "title": "Nomenclature and properties of acyl (acid) halides and acid anhydrides", "kind": "Video", "description": "How to name acyl (acid) chlorides and acid anhydrides and how to analyze their physical properties", "slug": "nomenclature-and-properties-of-acyl-acid-halides-and-acid-anhydrides"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay/nomenclature-and-properties-of-esters/", "id": "R9PjfG1e7-w", "title": "Nomenclature and properties of esters", "kind": "Video", "description": "How to name esters and how to analyze their physical properties", "slug": "nomenclature-and-properties-of-esters"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay/nomenclature-and-properties-of-amides/", "id": "EgTd7OSTO1I", "title": "Nomenclature and properties of amides", "kind": "Video", "description": "How to name amides and the physical properties of acetamide", "slug": "nomenclature-and-properties-of-amides"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay/reactivity-of-carboxylic-acid-derivatives/", "id": "MWii7tL0T84", "title": "Reactivity of carboxylic acid derivatives", "kind": "Video", "description": "How to analyze the reactivity of the carboxylic acid derivatives using induction and resonance effects", "slug": "reactivity-of-carboxylic-acid-derivatives"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay/nucleophilic-acyl-substitution/", "id": "3QWJrPq_HB0", "title": "Nucleophilic acyl substitution", "kind": "Video", "description": "The general mechanism of nucleophilic acyl substitution (and leaving group stability)", "slug": "nucleophilic-acyl-substitution"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay/acid-catalyzed-ester-hydrolysis/", "id": "K7XAk7EvLSc", "title": "Acid-catalyzed ester hydrolysis", "kind": "Video", "description": "The mechanism for the acid-catalyzed hydrolysis of esters (and transesterification)", "slug": "acid-catalyzed-ester-hydrolysis"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay/acid-and-base-catalyzed-hydrolysis-of-amides/", "id": "MGF0jSP3Txo", "title": "Acid and base-catalyzed hydrolysis of amides", "kind": "Video", "description": "The mechanisms for acid and base catalyzed hydrolysis of amides", "slug": "acid-and-base-catalyzed-hydrolysis-of-amides"}, {"path": "khan/science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay/beta-lactam-antibiotics/", "id": "I-uzVCJCRpE", "title": "Beta-lactam antibiotics", "kind": "Video", "description": "The mechanism of action of beta-lactam antibiotics", "slug": "beta-lactam-antibiotics"}], "in_knowledge_map": false, "description": "In this tutorial, Jay shows you the nomenclature, properties, and reactions of carboxylic acid derivatives.", "node_slug": "acid-derivatives-jay", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay", "extended_slug": "science/organic-chemistry/carboxylic-acids-derivatives/acid-derivatives-jay", "kind": "Topic", "slug": "acid-derivatives-jay"}], "in_knowledge_map": false, "description": "naming carboxylic acids, formation of carboxylic acid derivatives", "node_slug": "carboxylic-acids-derivatives", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/carboxylic-acids-derivatives", "extended_slug": "science/organic-chemistry/carboxylic-acids-derivatives", "kind": "Topic", "slug": "carboxylic-acids-derivatives"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/", "id": "ochem-alpha-carbon-chemistry", "hide": false, "title": "Alpha carbon chemistry", "child_data": [{"kind": "Topic", "id": "xe7ae0eb0"}, {"kind": "Topic", "id": "x186b8b8e"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/formation-of-enolate-anions/", "id": "formation-of-enolate-anions", "hide": false, "title": "Formation of enolate anions", "child_data": [{"kind": "Video", "id": "6022769"}, {"kind": "Video", "id": "xe885dfb1"}, {"kind": "Video", "id": "x098c1f45"}, {"kind": "Video", "id": "xaea0840a"}, {"kind": "Video", "id": "xaf94b7bc"}], "children": [{"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/formation-of-enolate-anions/keto-enol-tautomerization/", "id": "SXbc4J1qWjE", "title": "Keto-enol tautomerization (by Sal)", "kind": "Video", "description": "Keto Enol Tautomerization", "slug": "keto-enol-tautomerization"}, {"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/formation-of-enolate-anions/keto-enol-tautomerization-2/", "id": "NdRl1C6Jr5o", "title": "Keto-enol tautomerization (by Jay)", "kind": "Video", "description": "Mechanisms for acid and base catalyzed keto-enol tautomerization. By Jay.", "slug": "keto-enol-tautomerization-2"}, {"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/formation-of-enolate-anions/enolate-formation-from-aldehydes/", "id": "bhxo9Wwr4mA", "title": "Enolate formation from aldehydes", "kind": "Video", "description": "How to form enolates from aldehydes using sodium ethoxide and sodium hydride", "slug": "enolate-formation-from-aldehydes"}, {"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/formation-of-enolate-anions/enolate-formation-from-ketones/", "id": "lhRfE13mM70", "title": "Enolate formation from ketones", "kind": "Video", "description": "Forming enolates from ketones using LDA and sodium ethoxide", "slug": "enolate-formation-from-ketones"}, {"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/formation-of-enolate-anions/kinetic-and-thermodynamic-enolates/", "id": "sBuM8hTGlag", "title": "Kinetic and thermodynamic enolates", "kind": "Video", "description": "How to form different enolates from ketones", "slug": "kinetic-and-thermodynamic-enolates"}], "in_knowledge_map": false, "description": "In this tutorial, Sal and Jay show you how to form enolate anions from aldehydes and ketones.", "node_slug": "formation-of-enolate-anions", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/ochem-alpha-carbon-chemistry/formation-of-enolate-anions", "extended_slug": "science/organic-chemistry/ochem-alpha-carbon-chemistry/formation-of-enolate-anions", "kind": "Topic", "slug": "formation-of-enolate-anions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/aldol-condensation-jay/", "id": "aldol-condensation-jay", "hide": false, "title": "Aldol condensations", "child_data": [{"kind": "Video", "id": "6022777"}, {"kind": "Video", "id": "x96be1299"}, {"kind": "Video", "id": "xd46c67f7"}, {"kind": "Video", "id": "x690d8530"}, {"kind": "Video", "id": "xb71ae0d8"}, {"kind": "Video", "id": "x246923bf"}], "children": [{"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/aldol-condensation-jay/aldol-reaction/", "id": "3XiHrsZNZko", "title": "Aldol reaction", "kind": "Video", "description": "Aldol Reaction", "slug": "aldol-reaction"}, {"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/aldol-condensation-jay/aldol-condensation/", "id": "sjMsyk-rP8I", "title": "Aldol condensation", "kind": "Video", "description": "Base-catalyzed mechanism for aldol addition and aldol condensation", "slug": "aldol-condensation"}, {"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/aldol-condensation-jay/mixed-crossed-aldol-condensation/", "id": "NAW1pqHs2_c", "title": "Mixed (crossed) aldol condensation", "kind": "Video", "description": "How to find the product of a mixed (crossed) aldol condensation", "slug": "mixed-crossed-aldol-condensation"}, {"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/aldol-condensation-jay/mixed-crossed-aldol-condensation-using-a-lithium-enolate/", "id": "g0_bWq24Np0", "title": "Mixed (crossed) aldol condensation using a lithium enolate", "kind": "Video", "description": "How to direct a mixed aldol condensation using a lithium enolate", "slug": "mixed-crossed-aldol-condensation-using-a-lithium-enolate"}, {"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/aldol-condensation-jay/retro-aldol-and-retrosynthesis/", "id": "dKFE0uJayM8", "title": "Retro-aldol and retrosynthesis", "kind": "Video", "description": "How to think about the aldol condensation using retrosynthesis", "slug": "retro-aldol-and-retrosynthesis"}, {"path": "khan/science/organic-chemistry/ochem-alpha-carbon-chemistry/aldol-condensation-jay/intramolecular-aldol-condensation/", "id": "NSPrIjA6T-c", "title": "Intramolecular aldol condensation", "kind": "Video", "description": "How to determine the product of an intramolecular aldol condensation", "slug": "intramolecular-aldol-condensation"}], "in_knowledge_map": false, "description": "In this tutorial, Sal and Jay show you the mechanism of the aldol condensation and how to predict the products of aldol reactions.", "node_slug": "aldol-condensation-jay", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/ochem-alpha-carbon-chemistry/aldol-condensation-jay", "extended_slug": "science/organic-chemistry/ochem-alpha-carbon-chemistry/aldol-condensation-jay", "kind": "Topic", "slug": "aldol-condensation-jay"}], "in_knowledge_map": false, "description": "formation of enolate anions, aldol condensations", "node_slug": "ochem-alpha-carbon-chemistry", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/ochem-alpha-carbon-chemistry", "extended_slug": "science/organic-chemistry/ochem-alpha-carbon-chemistry", "kind": "Topic", "slug": "ochem-alpha-carbon-chemistry"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/amines-topic/", "id": "amines-topic", "hide": false, "title": "Amines", "child_data": [{"kind": "Topic", "id": "x49e1a7af"}, {"kind": "Topic", "id": "x5454382e"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/amines-topic/naming-amines/", "id": "naming-amines", "hide": false, "title": "Naming amines", "child_data": [{"kind": "Video", "id": "6022760"}, {"kind": "Video", "id": "6022761"}], "children": [{"path": "khan/science/organic-chemistry/amines-topic/naming-amines/amine-naming-introduction/", "id": "Kpov3GS6tjM", "title": "Amine naming introduction", "kind": "Video", "description": "Amine Naming Introduction", "slug": "amine-naming-introduction"}, {"path": "khan/science/organic-chemistry/amines-topic/naming-amines/amine-naming-2/", "id": "CJzuu_k9Nv0", "title": "Amine naming 2", "kind": "Video", "description": "Amine Naming 2", "slug": "amine-naming-2"}], "in_knowledge_map": false, "description": "In this tutorial, Sal shows how to name amines.", "node_slug": "naming-amines", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/amines-topic/naming-amines", "extended_slug": "science/organic-chemistry/amines-topic/naming-amines", "kind": "Topic", "slug": "naming-amines"}], "in_knowledge_map": false, "description": "nomenclature and reactions of amines", "node_slug": "amines-topic", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/amines-topic", "extended_slug": "science/organic-chemistry/amines-topic", "kind": "Topic", "slug": "amines-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/organic-chemistry/spectroscopy-jay/", "id": "spectroscopy-jay", "hide": false, "title": "Spectroscopy", "child_data": [{"kind": "Topic", "id": "x893fed9a"}, {"kind": "Topic", "id": "xf4bd2eaa"}, {"kind": "Topic", "id": "x8f3d8f37"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory/", "id": "infrared-spectroscopy-theory", "hide": false, "title": "Infrared Spectroscopy", "child_data": [{"kind": "Video", "id": "x94a9caf3"}, {"kind": "Video", "id": "xe8699a3e"}, {"kind": "Video", "id": "x255ee57a"}, {"kind": "Video", "id": "x275db936"}, {"kind": "Video", "id": "xeb267644"}, {"kind": "Video", "id": "xe9ecdd63"}, {"kind": "Video", "id": "x9d5db2e5"}, {"kind": "Video", "id": "xf925efaa"}, {"kind": "Video", "id": "xb621cf29"}], "children": [{"path": "khan/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory/introduction-to-infrared-spectroscopy/", "id": "mZ-U7Qpkz8Y", "title": "Introduction to infrared spectroscopy", "kind": "Video", "slug": "introduction-to-infrared-spectroscopy"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory/bonds-as-springs/", "id": "ETdNsO7mKXM", "title": "Bonds as springs", "kind": "Video", "slug": "bonds-as-springs"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory/signal-characteristics-wave-number/", "id": "MlMwMqM_Wsg", "title": "Signal characteristics - wavenumber", "kind": "Video", "slug": "signal-characteristics-wave-number"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory/ir-spectra-for-hydrocarbons/", "id": "_nzaMQKpPLM", "title": "IR spectra for hydrocarbons", "kind": "Video", "slug": "ir-spectra-for-hydrocarbons"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory/signal-characteristics-intensity/", "id": "xFNeN9rONKY", "title": "Signal characteristics - intensity", "kind": "Video", "slug": "signal-characteristics-intensity"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory/signal-characteristics-shape/", "id": "ALLSsIDhFdU", "title": "Signal characteristics - shape", "kind": "Video", "slug": "signal-characteristics-shape"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory/symmetric-and-asymmetric-stretching/", "id": "9GPuoukU8fM", "title": "Symmetric and asymmetric stretching", "kind": "Video", "slug": "symmetric-and-asymmetric-stretching"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory/ir-signals-for-carbonyl-compounds/", "id": "VymVIXcyErI", "title": "IR signals for carbonyl compounds", "kind": "Video", "slug": "ir-signals-for-carbonyl-compounds"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory/ir-spectra-practice/", "id": "mJt1QI-yDG4", "title": "IR spectra practice", "kind": "Video", "slug": "ir-spectra-practice"}], "in_knowledge_map": false, "description": "In this tutorial, Jay introduces the theory of IR spectroscopy and shows how to analyze simple IR spectra.", "node_slug": "infrared-spectroscopy-theory", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory", "extended_slug": "science/organic-chemistry/spectroscopy-jay/infrared-spectroscopy-theory", "kind": "Topic", "slug": "infrared-spectroscopy-theory"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/spectroscopy-jay/uv-vis-spectroscopy/", "id": "uv-vis-spectroscopy", "hide": false, "title": "UV/Vis Spectroscopy", "child_data": [{"kind": "Video", "id": "xb2a1d125"}, {"kind": "Video", "id": "x12e82317"}, {"kind": "Video", "id": "x876e0e36"}], "children": [{"path": "khan/science/organic-chemistry/spectroscopy-jay/uv-vis-spectroscopy/uv-vis-spectroscopy/", "id": "1FQPXtN7MeI", "title": "UV-Vis spectroscopy", "kind": "Video", "slug": "uv-vis-spectroscopy"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/uv-vis-spectroscopy/absorption-in-the-visible-region/", "id": "5HMMfiyszjo", "title": "Absorption in the visible region", "kind": "Video", "slug": "absorption-in-the-visible-region"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/uv-vis-spectroscopy/conjugation-and-color-1/", "id": "zAQz5J3Tpgs", "title": "Conjugation and color", "kind": "Video", "slug": "conjugation-and-color-1"}], "in_knowledge_map": false, "description": "In this tutorial, Jay introduces UV/Vis spectroscopy and color in organic compounds.", "node_slug": "uv-vis-spectroscopy", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/spectroscopy-jay/uv-vis-spectroscopy", "extended_slug": "science/organic-chemistry/spectroscopy-jay/uv-vis-spectroscopy", "kind": "Topic", "slug": "uv-vis-spectroscopy"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/", "id": "proton-nmr", "hide": false, "title": "proton NMR", "child_data": [{"kind": "Video", "id": "xdd5a22f0"}, {"kind": "Video", "id": "x2609584c"}, {"kind": "Video", "id": "x29d65872"}, {"kind": "Video", "id": "x63a51409"}, {"kind": "Video", "id": "xb1fbb528"}, {"kind": "Video", "id": "x5517454d"}, {"kind": "Video", "id": "xceda29a2"}, {"kind": "Video", "id": "x0e327bb2"}, {"kind": "Video", "id": "xb383ffaa"}, {"kind": "Video", "id": "xd6c0a443"}, {"kind": "Video", "id": "x73955b89"}, {"kind": "Video", "id": "x29a93415"}, {"kind": "Video", "id": "x26961ec2"}, {"kind": "Video", "id": "x008fb1a1"}, {"kind": "Video", "id": "x09b6f1e8"}], "children": [{"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/introduction-to-proton-nmr/", "id": "jjcHZuTGWXk", "title": "Introduction to proton NMR", "kind": "Video", "slug": "introduction-to-proton-nmr"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/nuclear-shielding/", "id": "rFmAWQSiqRo", "title": "Nuclear shielding", "kind": "Video", "slug": "nuclear-shielding"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/chemical-equivalence/", "id": "p9B4s0N5yk8", "title": "Chemical equivalence", "kind": "Video", "slug": "chemical-equivalence"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/chemical-shift/", "id": "y_sR3OyZUGo", "title": "Chemical shift", "kind": "Video", "slug": "chemical-shift"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/electronegativity-and-chemical-shift/", "id": "CI84wFXN_Vg", "title": "Electronegativity and chemical shift", "kind": "Video", "slug": "electronegativity-and-chemical-shift"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/diamagnetic-anisotropy/", "id": "ZxNd67TbMLA", "title": "Diamagnetic anisotropy", "kind": "Video", "slug": "diamagnetic-anisotropy"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/integration/", "id": "6dP-mNDnU-A", "title": "Integration", "kind": "Video", "slug": "integration"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/spin-spin-splitting-coupling/", "id": "QlM21sl-TDg", "title": "Spin-spin splitting (coupling)", "kind": "Video", "slug": "spin-spin-splitting-coupling"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/multiplicity-n-1-rule/", "id": "86iNZaZ0S84", "title": "Multiplicity: n + 1 rule", "kind": "Video", "slug": "multiplicity-n-1-rule"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/coupling-constant/", "id": "wZJ_iAxvHGU", "title": "Coupling constant", "kind": "Video", "slug": "coupling-constant"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/complex-splitting/", "id": "intPEdg4Yyc", "title": "Complex splitting", "kind": "Video", "slug": "complex-splitting"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/hydrogen-deficiency-index/", "id": "5bWxTfRZx70", "title": "Hydrogen deficiency index", "kind": "Video", "slug": "hydrogen-deficiency-index"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/proton-nmr-practice-1/", "id": "YrHx2R72hFk", "title": "Proton NMR practice 1", "kind": "Video", "slug": "proton-nmr-practice-1"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/proton-nmr-practice-2/", "id": "gZu9Hhz23EY", "title": "Proton NMR practice 2", "kind": "Video", "slug": "proton-nmr-practice-2"}, {"path": "khan/science/organic-chemistry/spectroscopy-jay/proton-nmr/proton-nmr-practice-3/", "id": "15fz6Wo84IA", "title": "Proton NMR practice 3", "kind": "Video", "slug": "proton-nmr-practice-3"}], "in_knowledge_map": false, "description": "In this tutorial, Jay introduces the theory of proton NMR and shows how to analyze NMR spectra.", "node_slug": "proton-nmr", "render_type": "Tutorial", "topic_page_url": "/science/organic-chemistry/spectroscopy-jay/proton-nmr", "extended_slug": "science/organic-chemistry/spectroscopy-jay/proton-nmr", "kind": "Topic", "slug": "proton-nmr"}], "in_knowledge_map": false, "description": "IR, UV/Vis, and NMR Spectroscopy", "node_slug": "spectroscopy-jay", "render_type": "Topic", "topic_page_url": "/science/organic-chemistry/spectroscopy-jay", "extended_slug": "science/organic-chemistry/spectroscopy-jay", "kind": "Topic", "slug": "spectroscopy-jay"}], "in_knowledge_map": false, "description": "Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of basic high school or college chemistry assumed (although there is some review).", "node_slug": "organic-chemistry", "render_type": "Subject", "topic_page_url": "/science/organic-chemistry", "extended_slug": "science/organic-chemistry", "kind": "Topic", "slug": "organic-chemistry"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/cosmology-and-astronomy/", "id": "cosmology-and-astronomy", "hide": false, "title": "Cosmology and astronomy", "child_data": [{"kind": "Topic", "id": "xf5991d77"}, {"kind": "Topic", "id": "x0ba2bf5b"}, {"kind": "Topic", "id": "x860f890e"}, {"kind": "Topic", "id": "xc2dac31d"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/", "id": "universe-scale-topic", "hide": false, "title": "Scale of the universe", "child_data": [{"kind": "Topic", "id": "xecd1a811"}, {"kind": "Topic", "id": "x5f4b7f40"}, {"kind": "Topic", "id": "x00e9a5dc"}, {"kind": "Topic", "id": "x5711b7ae"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/", "id": "scale-earth-galaxy-tutorial", "hide": false, "title": "Scale of earth, sun, galaxy and universe", "child_data": [{"kind": "Video", "id": "89868304"}, {"kind": "Video", "id": "91063693"}, {"kind": "Video", "id": "8187268"}, {"kind": "Video", "id": "8187269"}, {"kind": "Video", "id": "8187270"}, {"kind": "Video", "id": "8187271"}, {"kind": "Video", "id": "8187272"}, {"kind": "Video", "id": "8187273"}], "children": [{"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/scale-of-the-large/", "id": "5FEjrStgcF8", "title": "Scale of the large", "kind": "Video", "description": "Attempting to comprehend the scale of the large", "slug": "scale-of-the-large"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/scale-of-the-small/", "id": "ERKx3Oa2omo", "title": "Scale of the small", "kind": "Video", "description": "From honey bees to cells, viruses, and atoms -- understanding the scale of the very small", "slug": "scale-of-the-small"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/scale-of-earth-and-sun/", "id": "GZx3U0dbASg", "title": "Scale of earth and sun", "kind": "Video", "description": "Scale of Earth and Sun", "slug": "scale-of-earth-and-sun"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/scale-of-solar-system/", "id": "GP53b__h4ew", "title": "Scale of solar system", "kind": "Video", "description": "Sal Khan describes the scale of our Solar System.", "slug": "scale-of-solar-system"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/scale-of-distance-to-closest-stars/", "id": "jEeJkkMXt6c", "title": "Scale of distance to closest stars", "kind": "Video", "description": "Scale of Distance to Closest Stars", "slug": "scale-of-distance-to-closest-stars"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/scale-of-the-galaxy/", "id": "rcLnMe1ELPA", "title": "Scale of the galaxy", "kind": "Video", "description": "Scale of the Galaxy", "slug": "scale-of-the-galaxy"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/intergalactic-scale/", "id": "JiE_kNk3ucI", "title": "Intergalactic scale", "kind": "Video", "description": "Intergalactic Scale", "slug": "intergalactic-scale"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/hubble-image-of-galaxies/", "id": "Wl4re38deh0", "title": "Hubble image of galaxies", "kind": "Video", "description": "Hubble Image of Galaxies", "slug": "hubble-image-of-galaxies"}], "in_knowledge_map": false, "description": "The Earth is huge, but it is tiny compared to the Sun (which is super huge). But the Sun is tiny compared to the solar system which is tiny compared to the distance to the next star. Oh, did we mention that there are over 100 billion stars in our galaxy (which is about 100,000 light years in diameter) which is one of hundreds of billions of galaxies in just the observable universe (which might be infinite for all we know). Don't feel small. We find it liberating. Your everyday human stresses are nothing compared to this enormity that we are a part of. Enjoy the fact that we get to be part of this vastness!", "node_slug": "scale-earth-galaxy-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial", "extended_slug": "science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial", "kind": "Topic", "slug": "scale-earth-galaxy-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/cosmos-time-scale-tutorial/", "id": "cosmos-time-scale-tutorial", "hide": false, "title": "Time scale of the cosmos", "child_data": [{"kind": "Video", "id": "8187354"}, {"kind": "Video", "id": "8187355"}], "children": [{"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/cosmos-time-scale-tutorial/cosmological-time-scale-1/", "id": "DRtLXagrMHw", "title": "Cosmological time scale 1", "kind": "Video", "description": "Cosmological Time Scale 1", "slug": "cosmological-time-scale-1"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/cosmos-time-scale-tutorial/cosmological-time-scale-2/", "id": "LO7-3MpWijU", "title": "Cosmological time scale 2", "kind": "Video", "description": "Cosmological Time Scale 2", "slug": "cosmological-time-scale-2"}], "in_knowledge_map": false, "description": "Not only is the universe unimaginable large (possibly infinite), but it is also unimaginably old. If you were feeling small in space, wait until you realize that all of human history is but a tiny blip in the history of the universe.", "node_slug": "cosmos-time-scale-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/universe-scale-topic/cosmos-time-scale-tutorial", "extended_slug": "science/cosmology-and-astronomy/universe-scale-topic/cosmos-time-scale-tutorial", "kind": "Topic", "slug": "cosmos-time-scale-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/light-fundamental-forces/", "id": "light-fundamental-forces", "hide": false, "title": "Light and fundamental forces", "child_data": [{"kind": "Video", "id": "148049940"}, {"kind": "Video", "id": "8187356"}], "children": [{"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/light-fundamental-forces/introduction-to-light/", "id": "rLNM8zI4Q_M", "title": "Introduction to light", "kind": "Video", "description": "Light and electromagnetic radiation", "slug": "introduction-to-light"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/light-fundamental-forces/four-fundamental-forces/", "id": "FEF6PxWOvsk", "title": "Four fundamental forces", "kind": "Video", "description": "Gravity, Weak, Electromagnetic and Strong", "slug": "four-fundamental-forces"}], "in_knowledge_map": false, "description": "This tutorial gives an overview of light and the fundamental four forces. You won't have a degree in physics after this, but it'll give you some good context for understanding cosmology and the universe we are experiencing. It should be pretty understandable by someone with a very basic background in science.", "node_slug": "light-fundamental-forces", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/universe-scale-topic/light-fundamental-forces", "extended_slug": "science/cosmology-and-astronomy/universe-scale-topic/light-fundamental-forces", "kind": "Topic", "slug": "light-fundamental-forces"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/", "id": "big-bang-expansion-topic", "hide": false, "title": "Big bang and expansion of the universe", "child_data": [{"kind": "Video", "id": "8187274"}, {"kind": "Video", "id": "8187275"}, {"kind": "Video", "id": "8187276"}, {"kind": "Video", "id": "8187351"}, {"kind": "Video", "id": "8187352"}, {"kind": "Video", "id": "8187353"}, {"kind": "Video", "id": "8187365"}, {"kind": "Video", "id": "8187279"}], "children": [{"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/big-bang-introduction/", "id": "eUF59jCFcyQ", "title": "Big bang introduction", "kind": "Video", "slug": "big-bang-introduction"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/radius-of-observable-universe/", "id": "6nVysrZQnOQ", "title": "Radius of observable universe", "kind": "Video", "description": "Radius of Observable Universe", "slug": "radius-of-observable-universe"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/correction-radius-of-observable-universe/", "id": "b6VQv76BQDs", "title": "Radius of observable universe (correction)", "kind": "Video", "description": "(Correction) Radius of Observable Universe", "slug": "correction-radius-of-observable-universe"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/red-shift/", "id": "mx2M_ZKXM_c", "title": "Red shift", "kind": "Video", "slug": "red-shift"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/cosmic-background-radiation/", "id": "sxbPwl_KRuA", "title": "Cosmic background radiation", "kind": "Video", "description": "Cosmic Background Radiation", "slug": "cosmic-background-radiation"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/cosmic-background-radiation-2/", "id": "06z7Q8TWPyU", "title": "Cosmic background radiation 2", "kind": "Video", "description": "Cosmic Background Radiation 2 - Redshift of the Cosmic Background Radiation", "slug": "cosmic-background-radiation-2"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/hubble-s-law/", "id": "1V9wVmO0Tfg", "title": "Hubble's law", "kind": "Video", "description": "Hubble's Law", "slug": "hubble-s-law"}, {"path": "khan/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic/a-universe-smaller-than-the-observable/", "id": "0w9R_foNLrg", "title": "A universe smaller than the observable", "kind": "Video", "description": "A Universe Smaller than the Observable", "slug": "a-universe-smaller-than-the-observable"}], "in_knowledge_map": false, "description": "What does it mean for the universe to expand? Was the \"big bang\" an explosion of some sort or a rapid expansion of space-time (it was the latter)? If the universe was/is expanding, what is \"outside\" it? How do we know how far/old things are?\n\nThis tutorial addresses some of the oldest questions known to man.", "node_slug": "big-bang-expansion-topic", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic", "extended_slug": "science/cosmology-and-astronomy/universe-scale-topic/big-bang-expansion-topic", "kind": "Topic", "slug": "big-bang-expansion-topic"}], "in_knowledge_map": false, "description": "Things in our universe can be unimaginably large and small. In this topic, we'll try to imagine the unimaginable!", "node_slug": "universe-scale-topic", "render_type": "Topic", "topic_page_url": "/science/cosmology-and-astronomy/universe-scale-topic", "extended_slug": "science/cosmology-and-astronomy/universe-scale-topic", "kind": "Topic", "slug": "universe-scale-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/", "id": "stellar-life-topic", "hide": false, "title": "Stars, black holes and galaxies", "child_data": [{"kind": "Topic", "id": "x797135d1"}, {"kind": "Topic", "id": "xe6a7ce95"}, {"kind": "Topic", "id": "x0b998516"}, {"kind": "Topic", "id": "xe2c51a1f"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/", "id": "stellar-life-death-tutorial", "hide": false, "title": "Life and death of stars", "child_data": [{"kind": "Video", "id": "8187357"}, {"kind": "Video", "id": "1272530969"}, {"kind": "Scratchpad", "id": "1176457365"}, {"kind": "Video", "id": "8187358"}, {"kind": "Video", "id": "8187359"}, {"kind": "Video", "id": "8187360"}, {"kind": "Video", "id": "8187386"}, {"kind": "Video", "id": "8187387"}, {"kind": "Video", "id": "8187388"}, {"kind": "Video", "id": "8187389"}, {"kind": "Video", "id": "8187393"}], "children": [{"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/birth-of-stars/", "id": "i-NNWI8Ccas", "title": "Birth of stars", "kind": "Video", "description": "Birth of Stars", "slug": "birth-of-stars"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/accreting-mass-due-to-gravity-simulation/", "id": "hD4ySbQYYyA", "title": "Accreting mass due to gravity simulation", "kind": "Video", "slug": "accreting-mass-due-to-gravity-simulation"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/becoming-a-red-giant/", "id": "kJSOqlcFpJw", "title": "Becoming a red giant", "kind": "Video", "description": "Becoming a Red Giant", "slug": "becoming-a-red-giant"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/white-and-black-dwarfs/", "id": "EdYyuUUY-nc", "title": "White and black dwarfs", "kind": "Video", "description": "White and Black Dwarfs", "slug": "white-and-black-dwarfs"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/star-field-and-nebula-images/", "id": "w3IKEa_GOYs", "title": "Star field and nebula images", "kind": "Video", "description": "Star Field and Nebula Images", "slug": "star-field-and-nebula-images"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/lifecycle-of-massive-stars/", "id": "UhIwMAhZpCo", "title": "Lifecycle of massive stars", "kind": "Video", "description": "Lifecycle of Massive Stars", "slug": "lifecycle-of-massive-stars"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/supernova-supernovae/", "id": "qOwCpnQsDLM", "title": "Supernova (supernovae)", "kind": "Video", "description": "Supernova (Supernovae)", "slug": "supernova-supernovae"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/supernova-clarification/", "id": "QMv4kxATfzs", "title": "Supernova clarification", "kind": "Video", "description": "Supernova clarification", "slug": "supernova-clarification"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/black-holes/", "id": "JoL2pO3O0rg", "title": "Black holes", "kind": "Video", "description": "Black Holes", "slug": "black-holes"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/supermassive-black-holes/", "id": "DxkkAHnqlpY", "title": "Supermassive black holes", "kind": "Video", "description": "Supermassive Black Holes", "slug": "supermassive-black-holes"}], "in_knowledge_map": false, "description": "Stars begin when material drifting in space condenses due to gravity to be dense enough for fusion to occur. Depending on the volume and make-up of this material, the star could then develop into very different things--from supernovae, to neutron stars, to black holes. \n\nThis tutorial explores the life of stars and will have you appreciating the grand weirdness of our reality.", "node_slug": "stellar-life-death-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial", "extended_slug": "science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial", "kind": "Topic", "slug": "stellar-life-death-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/quasars/", "id": "quasars", "hide": false, "title": "Quasars and galactive collisions", "child_data": [{"kind": "Video", "id": "8187394"}, {"kind": "Video", "id": "8187395"}, {"kind": "Video", "id": "8187396"}], "children": [{"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/quasars/quasars/", "id": "4LmIyMyAuN0", "title": "Quasars", "kind": "Video", "description": "Quasars", "slug": "quasars"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/quasars/quasar-correction/", "id": "PX_XSnVWlNc", "title": "Quasar correction", "kind": "Video", "description": "Quasar Correction", "slug": "quasar-correction"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/quasars/galactic-collisions/", "id": "QXYbGZ3T3_k", "title": "Galactic collisions", "kind": "Video", "description": "Collision of the Milky Way Galaxy with Andromeda (forming \"Milkomeda\")", "slug": "galactic-collisions"}], "in_knowledge_map": false, "description": "Quasars are the brightest objects in the universe. The gamma rays from them could sterilize a solar system (i.e. obliterate life). What do we think these objects are? Why don't we see any close by (which we should be thankful for)? Could they tell us what our own galaxy may have been like 1 billion or so years ago?", "node_slug": "quasars", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/stellar-life-topic/quasars", "extended_slug": "science/cosmology-and-astronomy/stellar-life-topic/quasars", "kind": "Topic", "slug": "quasars"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial/", "id": "stellar-parallax-tutorial", "hide": false, "title": "Stellar parallax", "child_data": [{"kind": "Video", "id": "8187361"}, {"kind": "Video", "id": "145846956"}, {"kind": "Video", "id": "8187362"}, {"kind": "Video", "id": "8187363"}, {"kind": "Video", "id": "8187364"}], "children": [{"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial/parallax-in-observing-stars/", "id": "ETzUpoqZIHY", "title": "Parallax in observing stars", "kind": "Video", "description": "Parallax in Observing Stars", "slug": "parallax-in-observing-stars"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial/stellar-parallax/", "id": "omvNINaRdxg", "title": "Stellar parallax", "kind": "Video", "description": "Another version of the stellar parallax introduction", "slug": "stellar-parallax"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial/stellar-distance-using-parallax/", "id": "lVadjWOjvV8", "title": "Stellar distance using parallax", "kind": "Video", "description": "Stellar Distance Using Parallax", "slug": "stellar-distance-using-parallax"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial/stellar-parallax-clarification/", "id": "6FP-hLuAlr4", "title": "Stellar parallax clarification", "kind": "Video", "description": "Stellar Parallax Clarification", "slug": "stellar-parallax-clarification"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial/parsec-definition/", "id": "6zV3JEjLoyE", "title": "Parsec definition", "kind": "Video", "description": "Parsec Definition", "slug": "parsec-definition"}], "in_knowledge_map": false, "description": "We've talked a lot about distances to stars, but how do we know? Stellar parallax--which looks at how much a star shifts in the sky when Earth is at various points in its orbit--is the oldest technique we have for measuring how far stars are.\n\nIt is great for \"nearby\" stars even with precise instruments (i.e, in our part of our galaxy). To measure distance further, we have to start thinking about Cepheid variables (other tutorial).", "node_slug": "stellar-parallax-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial", "extended_slug": "science/cosmology-and-astronomy/stellar-life-topic/stellar-parallax-tutorial", "kind": "Topic", "slug": "stellar-parallax-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables/", "id": "cepheid-variables", "hide": false, "title": "Cepheid variables", "child_data": [{"kind": "Video", "id": "8187390"}, {"kind": "Video", "id": "8187391"}, {"kind": "Video", "id": "8187392"}], "children": [{"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables/cepheid-variables-1/", "id": "BWs-ONRDDG4", "title": "Cepheid variables 1", "kind": "Video", "description": "Cepheid Variables 1", "slug": "cepheid-variables-1"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables/why-cepheids-pulsate/", "id": "X_3QAB3o4Vw", "title": "Why cepheids pulsate", "kind": "Video", "description": "Why Cepheids Pulsate", "slug": "why-cepheids-pulsate"}, {"path": "khan/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables/why-gravity-gets-so-strong-near-dense-objects/", "id": "RpOHZc6cDIw", "title": "Why gravity gets so strong near dense objects", "kind": "Video", "description": "Why Gravity Gets So Strong Near Dense Objects", "slug": "why-gravity-gets-so-strong-near-dense-objects"}], "in_knowledge_map": false, "description": "Stellar parallax can be used for \"nearby\" stars, but what if we want to measure further out? Well this tutorial will expose you to a class of stars that helps us do this. Cepheids are large, bright, variable stars that are visible in other galaxies. We know how bright they should be and can gauge how far they are by how bright they look to us.", "node_slug": "cepheid-variables", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables", "extended_slug": "science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables", "kind": "Topic", "slug": "cepheid-variables"}], "in_knowledge_map": false, "description": "Our universe is defined by stars. This topic explores how they came to be and where they end up. This includes a discussion of black holes and galaxies.", "node_slug": "stellar-life-topic", "render_type": "Topic", "topic_page_url": "/science/cosmology-and-astronomy/stellar-life-topic", "extended_slug": "science/cosmology-and-astronomy/stellar-life-topic", "kind": "Topic", "slug": "stellar-life-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/cosmology-and-astronomy/earth-history-topic/", "id": "earth-history-topic", "hide": false, "title": "Earth geological and climatic history", "child_data": [{"kind": "Topic", "id": "xebbd27ba"}, {"kind": "Topic", "id": "x86341b65"}, {"kind": "Topic", "id": "xd0074f33"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/", "id": "plate-techtonics", "hide": false, "title": "Plate tectonics", "child_data": [{"kind": "Video", "id": "13179436"}, {"kind": "Video", "id": "13179437"}, {"kind": "Video", "id": "13179438"}, {"kind": "Video", "id": "13179439"}, {"kind": "Video", "id": "13179440"}, {"kind": "Video", "id": "13179441"}, {"kind": "Video", "id": "13179442"}, {"kind": "Video", "id": "13179459"}, {"kind": "Video", "id": "13179443"}, {"kind": "Video", "id": "13179458"}], "children": [{"path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/plate-tectonics-difference-between-crust-and-lithosphere/", "id": "f2BWsPVN7c4", "title": "Plate tectonics: Difference between crust and lithosphere", "kind": "Video", "description": "Plate Tectonics Introduction and Difference between crust and lithosphere", "slug": "plate-tectonics-difference-between-crust-and-lithosphere"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/structure-of-the-earth/", "id": "4AxZ-6MOznY", "title": "Structure of the earth", "kind": "Video", "description": "Structure of the Earth - crust, mantle, core", "slug": "structure-of-the-earth"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/plate-tectonics-evidence-of-plate-movement/", "id": "6EdsBabSZ4g", "title": "Plate tectonics: Evidence of plate movement", "kind": "Video", "description": "Plate Tectonics -- Evidence of plate movement", "slug": "plate-tectonics-evidence-of-plate-movement"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/plate-tectonics-geological-features-of-divergent-plate-boundaries/", "id": "FK1s1-OJ5BE", "title": "Plate tectonics: Geological features of divergent plate boundaries", "kind": "Video", "description": "Plate Tectonics -- Geological Features of Divergent Plate Boundaries", "slug": "plate-tectonics-geological-features-of-divergent-plate-boundaries"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/plate-tectonics-geological-features-of-convergent-plate-boundaries/", "id": "Y0eWnOZpSpQ", "title": "Plate tectonics: Geological features of convergent plate boundaries", "kind": "Video", "description": "Geological features of Convergent Plate Boundaries", "slug": "plate-tectonics-geological-features-of-convergent-plate-boundaries"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/plates-moving-due-to-convection-in-mantle/", "id": "f8GK2oEN-uI", "title": "Plates moving due to convection in mantle", "kind": "Video", "description": "Plates Moving Due to Convection in Mantle", "slug": "plates-moving-due-to-convection-in-mantle"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/hawaiian-islands-formation/", "id": "D1eibbfAEVk", "title": "Hawaiian islands formation", "kind": "Video", "description": "Hawaiian Islands formed by stationary hot spot under Pacific plate", "slug": "hawaiian-islands-formation"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/pangaea/", "id": "axB6uhEx628", "title": "Pangaea", "kind": "Video", "description": "Pangaea - the idea of Pangaea and some of the evidence behind it", "slug": "pangaea"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/compositional-and-mechanical-layers-of-the-earth/", "id": "hHteUIS0OFY", "title": "Compositional and mechanical layers of the earth", "kind": "Video", "description": "Crust, mantle, core, lithosphere, asthenosphere, mesosphere, outer core, inner core", "slug": "compositional-and-mechanical-layers-of-the-earth"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/how-we-know-about-the-earth-s-core/", "id": "KL0i1RSnpfI", "title": "How we know about the earth's core", "kind": "Video", "description": "S-wave shadow and P-wave detection patterns give us information about the core", "slug": "how-we-know-about-the-earth-s-core"}], "in_knowledge_map": false, "description": "Is it a coincidence that Africa and South America could fit like puzzle pieces? Why do earthquakes happen where they do? What about volcanoes and mountains? Are all of these ideas linked? Yes, they are.\n\nThis tutorial on plate-tectonics explains how and why the continents have shifted over time. In the process, we also explore the structure of the Earth, all the way down to the core.", "node_slug": "plate-techtonics", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics", "extended_slug": "science/cosmology-and-astronomy/earth-history-topic/plate-techtonics", "kind": "Topic", "slug": "plate-techtonics"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/earth-history-topic/seismic-waves-tutorial/", "id": "seismic-waves-tutorial", "hide": false, "title": "Seismic waves and how we know earth's structure", "child_data": [{"kind": "Video", "id": "13179444"}, {"kind": "Video", "id": "13179455"}, {"kind": "Video", "id": "13179456"}, {"kind": "Video", "id": "13179457"}], "children": [{"path": "khan/science/cosmology-and-astronomy/earth-history-topic/seismic-waves-tutorial/seismic-waves/", "id": "NhioAAdYDJM", "title": "Seismic waves", "kind": "Video", "description": "S-waves and P-waves", "slug": "seismic-waves"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/seismic-waves-tutorial/why-s-waves-only-travel-in-solids/", "id": "BTWLwoaNeBA", "title": "Why S-waves only travel in solids", "kind": "Video", "description": "Why S-Waves Only Travel in Solids", "slug": "why-s-waves-only-travel-in-solids"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/seismic-waves-tutorial/refraction-of-seismic-waves/", "id": "UNZ171fDja4", "title": "Refraction of seismic waves", "kind": "Video", "description": "Refraction of Seismic Waves", "slug": "refraction-of-seismic-waves"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/seismic-waves-tutorial/the-mohorovicic-seismic-discontinuity/", "id": "yAQSucmHrAk", "title": "The mohorovicic seismic discontinuity", "kind": "Video", "description": "The Mohorovicic Seismic Discontinuity- boundary between crust and mantle (or Moho)", "slug": "the-mohorovicic-seismic-discontinuity"}], "in_knowledge_map": false, "description": "How do we know what the Earth is made up of? Has someone dug to the core? No, but we humans have been able to see how earthquake (seismic) waves have been bent and reflected through our planet to get a reasonable idea of what is down there.", "node_slug": "seismic-waves-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/earth-history-topic/seismic-waves-tutorial", "extended_slug": "science/cosmology-and-astronomy/earth-history-topic/seismic-waves-tutorial", "kind": "Topic", "slug": "seismic-waves-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/", "id": "earth-title-topic", "hide": false, "title": "Earth's rotation and tilt", "child_data": [{"kind": "Video", "id": "150055884"}, {"kind": "Scratchpad", "id": "2131015999"}, {"kind": "Video", "id": "150055883"}, {"kind": "Video", "id": "152085900"}, {"kind": "Video", "id": "150055882"}, {"kind": "Video", "id": "152085903"}, {"kind": "Video", "id": "152085901"}, {"kind": "Video", "id": "152085902"}], "children": [{"path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/seasons-aren-t-dictated-by-closeness-to-sun/", "id": "SJUd5du0T08", "title": "Seasons aren't dictated by closeness to sun", "kind": "Video", "description": "Why our closeness to the sun does not dictate the seasons", "slug": "seasons-aren-t-dictated-by-closeness-to-sun"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/how-earth-s-tilt-causes-seasons/", "id": "05qDIjKevJo", "title": "How earth's tilt causes seasons", "kind": "Video", "description": "How being Earth's tilt causes seasons", "slug": "how-earth-s-tilt-causes-seasons"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/are-southern-hemisphere-seasons-more-severe/", "id": "umvNQj-zmq4", "title": "Are southern hemisphere seasons more severe?", "kind": "Video", "description": "Are Southern Hemisphere seasons more severe because of the eccentricity in Earth's orbit?", "slug": "are-southern-hemisphere-seasons-more-severe"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/milankovitch-cycles-precession-and-obliquity/", "id": "ZD8THEz18gc", "title": "Milankovitch cycles precession and obliquity", "kind": "Video", "description": "How changes in Earth's rotation can effect Earth's seasons and climate", "slug": "milankovitch-cycles-precession-and-obliquity"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/precession-causing-perihelion-to-happen-later/", "id": "2o-Sef6wllg", "title": "Precession causing perihelion to happen later", "kind": "Video", "description": "Clarifying the effect of axial precession on the calendar and the date of perihelion and aphelion", "slug": "precession-causing-perihelion-to-happen-later"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/what-causes-precession-and-other-orbital-changes/", "id": "nL6LMX8-bPY", "title": "What causes precession and other orbital changes", "kind": "Video", "description": "What causes precession and other orbital changes", "slug": "what-causes-precession-and-other-orbital-changes"}, {"path": "khan/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/apsidal-precession-perihelion-precession-and-milankovitch-cycles/", "id": "m6lMGoZTJnc", "title": "Apsidal precession (perihelion precession) and Milankovitch cycles", "kind": "Video", "description": "Apsidal Precession (Perihelion Precession)", "slug": "apsidal-precession-perihelion-precession-and-milankovitch-cycles"}], "in_knowledge_map": false, "description": "What causes the seasons? Even more, can Earth's climate change over long period just to \"wobbles\" in its orbit? This tutorial explains it all. You'll know more about orbits (and precession and Milankovitch cycles) than you ever thought possible. Have fun!", "node_slug": "earth-title-topic", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic", "extended_slug": "science/cosmology-and-astronomy/earth-history-topic/earth-title-topic", "kind": "Topic", "slug": "earth-title-topic"}], "in_knowledge_map": false, "description": "What is the Earth made up of and how do we know? What causes the seasons? Are there longer-ranging cycles in Earth's climate?", "node_slug": "earth-history-topic", "render_type": "Topic", "topic_page_url": "/science/cosmology-and-astronomy/earth-history-topic", "extended_slug": "science/cosmology-and-astronomy/earth-history-topic", "kind": "Topic", "slug": "earth-history-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/cosmology-and-astronomy/life-earth-universe/", "id": "life-earth-universe", "hide": false, "title": "Life on earth and in the universe", "child_data": [{"kind": "Topic", "id": "xe8d3be24"}, {"kind": "Topic", "id": "x3dfb58f1"}, {"kind": "Topic", "id": "xe6c86721"}, {"kind": "Topic", "id": "xd02bb28b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/", "id": "history-life-earth-tutorial", "hide": false, "title": "History of life on earth", "child_data": [{"kind": "Video", "id": "13179297"}, {"kind": "Video", "id": "13179298"}, {"kind": "Video", "id": "13179299"}, {"kind": "Video", "id": "13179300"}, {"kind": "Video", "id": "13179435"}], "children": [{"path": "khan/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/earth-formation/", "id": "VbNXh0GaLYo", "title": "Earth formation", "kind": "Video", "description": "How the Earth is a the byproduct of a local supernova", "slug": "earth-formation"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/beginnings-of-life/", "id": "nYFuxTXDj90", "title": "Beginnings of life", "kind": "Video", "description": "Life and photosynthesis start to thrive in the Archean Eon", "slug": "beginnings-of-life"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/ozone-layer-and-eukaryotes-show-up-in-the-proterozoic-eon/", "id": "E1P79uFLCMc", "title": "Ozone layer and eukaryotes show up in the Proterozoic eon", "kind": "Video", "description": "Ozone Layer and Eukaryotes Show Up in the Proterozoic Eon. Great Oxygenation Event (Oxygen Catastrophe)", "slug": "ozone-layer-and-eukaryotes-show-up-in-the-proterozoic-eon"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/biodiversity-flourishes-in-phanerozoic-eon/", "id": "MS7x2hDEhrw", "title": "Biodiversity flourishes in Phanerozoic eon", "kind": "Video", "description": "Cambrian explosion and biodiversity in the Phanerozoic Eon", "slug": "biodiversity-flourishes-in-phanerozoic-eon"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/first-living-things-on-land-clarification/", "id": "3gUE_P9T-Wk", "title": "First living things on land clarification", "kind": "Video", "description": "First living things on land clarification (This video copyrighted under Create Commons Attribution and Share-Alike CC-BY-SA license)", "slug": "first-living-things-on-land-clarification"}], "in_knowledge_map": false, "description": "Earth is over 4.5 billion years old. How do we know this? When did life first emerge? \n\nFrom the dawn of Earth as a planet to the first primitive life forms to our \"modern\" species, this tutorial is an epic journey of the history of life on Earth.", "node_slug": "history-life-earth-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial", "extended_slug": "science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial", "kind": "Topic", "slug": "history-life-earth-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/", "id": "humanity-on-earth-tutorial", "hide": false, "title": "Humanity on earth", "child_data": [{"kind": "Video", "id": "99682014"}, {"kind": "Video", "id": "101104459"}, {"kind": "Video", "id": "105033394"}, {"kind": "Video", "id": "112894148"}, {"kind": "Video", "id": "214248036"}, {"kind": "Video", "id": "400119682"}, {"kind": "Video", "id": "467947556"}, {"kind": "Video", "id": "464587015"}, {"kind": "Video", "id": "465986949"}, {"kind": "Video", "id": "466052144"}], "children": [{"path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/human-evolution-overview/", "id": "frE1rjhH77Y", "title": "Human evolution overview", "kind": "Video", "description": "From the extinction of the dinosaurs to humanity", "slug": "human-evolution-overview"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/understanding-calendar-notation/", "id": "EKKe7DBZVhI", "title": "Understanding calendar notation", "kind": "Video", "description": "Difference between BC, BCE, AD and CE. A little bit about the birth of Jesus as well.", "slug": "understanding-calendar-notation"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/correction-calendar-notation/", "id": "N06Jy-gQog8", "title": "Correction calendar notation", "kind": "Video", "description": "Correcting the time difference calculation by taking into account that there is no year 0", "slug": "correction-calendar-notation"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/development-of-agriculture-and-writing/", "id": "iU58AIjh3YA", "title": "Development of agriculture and writing", "kind": "Video", "description": "The Paleolithic and Neolithic eras of the Stone Age.", "slug": "development-of-agriculture-and-writing"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/firestick-farming/", "id": "mwUyaeWxJhA", "title": "Firestick farming", "kind": "Video", "description": "How the indigenous Australians used fire to change their environment", "slug": "firestick-farming"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/collective-learning/", "id": "NqR_dtZu4Mo", "title": "Collective learning", "kind": "Video", "description": "How symbolic language drives collective learning and how this is one of the truly differentiating aspects of human beings relative to the rest of the animal kingdom", "slug": "collective-learning"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/thomas-malthus-and-population-growth/", "id": "r1ywppAJ1xs", "title": "Thomas malthus and population growth", "kind": "Video", "description": "Thomas Malthus's views on population. Malthusian limits.", "slug": "thomas-malthus-and-population-growth"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/land-productivity-limiting-human-population/", "id": "xM8szz4VB28", "title": "Land productivity limiting human population", "kind": "Video", "description": "Thinking about how we get Calories from the land limits human population densities", "slug": "land-productivity-limiting-human-population"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/energy-inputs-for-tilling-a-hectare-of-land/", "id": "5I9dH5im24U", "title": "Energy inputs for tilling a hectare of land", "kind": "Video", "description": "Thinking about energy consumption for tilling land", "slug": "energy-inputs-for-tilling-a-hectare-of-land"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial/random-predictions-for-2060/", "id": "E4rbS0oxg30", "title": "Random predictions for 2060", "kind": "Video", "description": "Sal's random predictions for the year 2060", "slug": "random-predictions-for-2060"}], "in_knowledge_map": false, "description": "Where do we think humans come from? How and why have we developed as a species. This tutorial attempts to give an overview of these truly fundamental questions.\n\nFrom human evolution (which is covered in more depth in the biology playlist) to the development of agriculture, this tutorial will give you an appreciation of where we've been (and maybe where we're going).", "node_slug": "humanity-on-earth-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial", "extended_slug": "science/cosmology-and-astronomy/life-earth-universe/humanity-on-earth-tutorial", "kind": "Topic", "slug": "humanity-on-earth-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial/", "id": "measuring-age-tutorial", "hide": false, "title": "Measuring age on earth", "child_data": [{"kind": "Video", "id": "334540860"}, {"kind": "Video", "id": "8187416"}, {"kind": "Video", "id": "8187417"}, {"kind": "Video", "id": "328018950"}, {"kind": "Video", "id": "328024200"}], "children": [{"path": "khan/science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial/chronometric-revolution/", "id": "5mNTvtjDnP8", "title": "Chronometric revolution", "kind": "Video", "description": "Discussion of the relatively recent changes in our ability as a species to shine light on our deep past", "slug": "chronometric-revolution"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial/carbon-14-dating-1/", "id": "8wYvKeSK1IY", "title": "Carbon 14 dating 1", "kind": "Video", "description": "Carbon 14 Dating 1", "slug": "carbon-14-dating-1"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial/carbon-14-dating-2/", "id": "4YUtnod-YuE", "title": "Carbon 14 dating 2", "kind": "Video", "description": "Carbon 14 Dating 2", "slug": "carbon-14-dating-2"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial/potassium-argon-k-ar-dating/", "id": "NMZ5kJEviD0", "title": "Potassium-argon (K-Ar) dating", "kind": "Video", "description": "How K-Ar dating can be used to date very old volcanic rock and the things that might be buried in between", "slug": "potassium-argon-k-ar-dating"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial/k-ar-dating-calculation/", "id": "iLFcSfzrlMk", "title": "K-Ar dating calculation", "kind": "Video", "description": "Working through a calculation for K-Ar dating (good to have some prior experience with e and logarithms)", "slug": "k-ar-dating-calculation"}], "in_knowledge_map": false, "description": "Geologists and archaeologists will tell you how old things are or when they happened, but how do they know? This tutorial answers this question by covering some of the primary techniques of \"dating\" (not in the romantic sense).", "node_slug": "measuring-age-tutorial", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial", "extended_slug": "science/cosmology-and-astronomy/life-earth-universe/measuring-age-tutorial", "kind": "Topic", "slug": "measuring-age-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic/", "id": "life-in-universe-topic", "hide": false, "title": "Life in the universe", "child_data": [{"kind": "Video", "id": "91824745"}, {"kind": "Video", "id": "92633418"}, {"kind": "Video", "id": "92633419"}, {"kind": "Video", "id": "92633420"}, {"kind": "Video", "id": "94896541"}], "children": [{"path": "khan/science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic/detectable-civilizations-in-our-galaxy-1/", "id": "YYEgq1bweN4", "title": "Detectable civilizations in our galaxy 1", "kind": "Video", "description": "A framework for thinking about how many detectable civilizations are out there.", "slug": "detectable-civilizations-in-our-galaxy-1"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic/detectable-civilizations-in-our-galaxy-2/", "id": "jN03g05TSWM", "title": "Detectable civilizations in our galaxy 2", "kind": "Video", "description": "Why do we even care about the Drake Equation. Thinking about the fraction of a planet's life when a civilization might be detectable.", "slug": "detectable-civilizations-in-our-galaxy-2"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic/detectable-civilizations-in-our-galaxy-3/", "id": "LRmwUsxNSL0", "title": "Detectable civilizations in our galaxy 3", "kind": "Video", "description": "Reconciling with the traditional Drake Equation", "slug": "detectable-civilizations-in-our-galaxy-3"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic/detectable-civilizations-in-our-galaxy-4/", "id": "T5DGZIsfK-0", "title": "Detectable civilizations in our galaxy 4", "kind": "Video", "description": "Taking a shot at estimating the number of detectable civilizations", "slug": "detectable-civilizations-in-our-galaxy-4"}, {"path": "khan/science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic/detectable-civilizations-in-our-galaxy-5/", "id": "xL9ejqb53ms", "title": "Detectable civilizations in our galaxy 5", "kind": "Video", "description": "More reasons why we haven't detected anything yet.", "slug": "detectable-civilizations-in-our-galaxy-5"}], "in_knowledge_map": false, "description": "Are dolphins the only intelligent life in the universe? We don't know for sure, but this tutorial gives a framework for thinking about the problem.", "node_slug": "life-in-universe-topic", "render_type": "Tutorial", "topic_page_url": "/science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic", "extended_slug": "science/cosmology-and-astronomy/life-earth-universe/life-in-universe-topic", "kind": "Topic", "slug": "life-in-universe-topic"}], "in_knowledge_map": false, "description": "When and how did life emerge on Earth? How did humanity develop a civilization? Is there other intelligent life out there?", "node_slug": "life-earth-universe", "render_type": "Topic", "topic_page_url": "/science/cosmology-and-astronomy/life-earth-universe", "extended_slug": "science/cosmology-and-astronomy/life-earth-universe", "kind": "Topic", "slug": "life-earth-universe"}], "in_knowledge_map": false, "description": "Videos attempting to grasp a little bit about our Universe (many of the topics associated with \"Big History\")", "node_slug": "cosmology-and-astronomy", "render_type": "Subject", "topic_page_url": "/science/cosmology-and-astronomy", "extended_slug": "science/cosmology-and-astronomy", "kind": "Topic", "slug": "cosmology-and-astronomy"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/health-and-medicine/", "id": "health-and-medicine", "hide": false, "title": "Health and medicine", "child_data": [{"kind": "Topic", "id": "xd26f1052"}, {"kind": "Topic", "id": "x4a2e781b"}, {"kind": "Topic", "id": "x7e1f1da3"}, {"kind": "Topic", "id": "x3ab6bf15"}, {"kind": "Topic", "id": "xc0eb445e"}, {"kind": "Topic", "id": "xd590f813"}, {"kind": "Topic", "id": "x087fd35e"}, {"kind": "Topic", "id": "xc2c4a896"}, {"kind": "Topic", "id": "x5dca0fcf"}, {"kind": "Topic", "id": "xe6b41d69"}, {"kind": "Topic", "id": "x9a21c60d"}, {"kind": "Topic", "id": "xb5ddd610"}, {"kind": "Topic", "id": "x942fead4"}, {"kind": "Topic", "id": "xeed58500"}, {"kind": "Topic", "id": "xba4fce84"}, {"kind": "Topic", "id": "xbc12d55f"}, {"kind": "Topic", "id": "xcb978a6e"}, {"kind": "Topic", "id": "x25966750"}, {"kind": "Topic", "id": "x1f8c66c8"}, {"kind": "Topic", "id": "xca183e7b"}, {"kind": "Topic", "id": "x07fc128c"}, {"kind": "Topic", "id": "x069a1823"}, {"kind": "Topic", "id": "x44cdf003"}, {"kind": "Topic", "id": "x0a1e9875"}, {"kind": "Topic", "id": "xf84c16ab"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/", "id": "human-anatomy-and-physiology", "hide": false, "title": "Human anatomy and physiology", "child_data": [{"kind": "Topic", "id": "xd01a851d"}, {"kind": "Topic", "id": "xd544173e"}, {"kind": "Topic", "id": "x0830ab8f"}, {"kind": "Topic", "id": "x02ff2d24"}, {"kind": "Topic", "id": "xb76f16d5"}, {"kind": "Topic", "id": "x2e800973"}, {"kind": "Topic", "id": "x66e60f7a"}, {"kind": "Topic", "id": "x7d2cd2d4"}, {"kind": "Topic", "id": "xa1005862"}, {"kind": "Topic", "id": "x3b3d678e"}, {"kind": "Topic", "id": "xadc5b119"}, {"kind": "Topic", "id": "xf0c62ead"}, {"kind": "Topic", "id": "x718b86a0"}, {"kind": "Topic", "id": "xa024b3f7"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/", "id": "heart-introduction", "hide": false, "title": "Circulatory system introduction", "child_data": [{"kind": "Video", "id": "1081136975"}, {"kind": "Video", "id": "1081230475"}, {"kind": "Scratchpad", "id": "5537242157678592"}, {"kind": "Video", "id": "1192377802"}, {"kind": "Article", "id": "x21bb0cee"}, {"kind": "Video", "id": "1081112668"}, {"kind": "Video", "id": "1081260395"}, {"kind": "Video", "id": "x0c625f6c"}, {"kind": "Video", "id": "1036157588"}, {"kind": "Video", "id": "x7ac317cf"}, {"kind": "Video", "id": "23990"}, {"kind": "Exercise", "id": "x884b831c"}, {"kind": "Exercise", "id": "x56804c27"}, {"kind": "Exercise", "id": "xd5d0fcc3"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/meet-the-heart/", "id": "Vi1JK6IYVt8", "title": "Meet the heart!", "kind": "Video", "description": "Find out exactly where the heart rests in your body and what it does. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-heart"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/flow-through-the-heart/", "id": "7XaftdE_h60", "title": "Flow through the heart", "kind": "Video", "description": "Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "flow-through-the-heart"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/two-circulations-in-the-body/", "id": "K57qjYYjgIY", "title": "Two circulations in the body", "kind": "Video", "description": "Learn the difference between the pulmonary and systemic circulatory systems in the body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "two-circulations-in-the-body"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/lub-dub/", "id": "-4kGMI-qQ3I", "title": "Lub dub", "kind": "Video", "description": "Ever wonder why the heart sounds the way that it does? Opening and closing of heart valves makes the heart rhythm come alive with its lub dub beats... Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "lub-dub"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/layers-of-the-heart/", "id": "bm65xCS5ivo", "title": "Layers of the heart", "kind": "Video", "description": "Take a closer look at the heart, explore some of its interesting features and get to know the three layers that make up the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "layers-of-the-heart"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/thermoregulation-in-the-circulatory-system/", "id": "C_LiAEjuIIc", "title": "Thermoregulation in the circulatory system", "kind": "Video", "slug": "thermoregulation-in-the-circulatory-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/arteries-vs-veins-what-s-the-difference/", "id": "7b6LRebCgb4", "title": "Arteries vs. veins - what's the difference?", "kind": "Video", "description": "Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arteries-vs-veins-what-s-the-difference"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/arteries-arterioles-venules-and-veins/", "id": "iqRTd1NY-pU", "title": "Arteries, arterioles, venules, and veins", "kind": "Video", "description": "Learn the differences between these blood vessels! Rishi is a pediatric infectious disease physician and works at Khan Academy. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "arteries-arterioles-venules-and-veins"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/circulatory-system-and-the-heart/", "id": "QhiVnFvshZg", "title": "Circulatory system and the heart", "kind": "Video", "description": "Introduction to the circulatory system and the heart", "slug": "circulatory-system-and-the-heart"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/heart-quiz/", "id": "heart-quiz", "title": "Introductory circulatory system quiz", "slug": "heart-quiz", "kind": "Exercise"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/intermediate-circulatory-system-quiz/", "id": "intermediate-circulatory-system-quiz", "title": "Intermediate Circulatory System Quiz", "description": "Intermediate Circulatory System Quiz", "slug": "intermediate-circulatory-system-quiz", "kind": "Exercise"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction/advanced-heart-quiz/", "id": "advanced-heart-quiz", "title": "Advanced circulatory system quiz", "description": "Advanced heart quiz", "slug": "advanced-heart-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "No organ quite symbolizes love like the heart. One reason may be that your heart helps you live, by moving ~5 liters (1.3 gallons) of blood through almost 100,000 kilometers (62,000 miles) of blood vessels every single minute! It has to do this all day, everyday, without ever taking a vacation! Now that is true love. Learn about how the heart works, how blood flows through the heart, where the blood goes after it leaves the heart, and what your heart is doing when it makes the sound \u201cLub Dub.\u201d", "node_slug": "heart-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/heart-introduction", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/heart-introduction", "kind": "Topic", "slug": "heart-introduction"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/", "id": "lung_introduction", "hide": false, "title": "Respiratory system introduction", "child_data": [{"kind": "Video", "id": "1150539313"}, {"kind": "Video", "id": "1150475491"}, {"kind": "Video", "id": "1159072701"}, {"kind": "Video", "id": "1179650621"}, {"kind": "Video", "id": "1179655597"}, {"kind": "Video", "id": "xc69180a5"}, {"kind": "Video", "id": "23986"}, {"kind": "Exercise", "id": "x4e2cf098"}, {"kind": "Exercise", "id": "x41bbd5a7"}, {"kind": "Exercise", "id": "x5309e65f"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/meet-the-lungs/", "id": "qGiPZf7njqY", "title": "Meet the lungs", "kind": "Video", "description": "Every time you take a breath, oxygen makes it way into your lungs. Follow along on that journey! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-lungs"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/people-and-plants/", "id": "lzWUG4H5QBo", "title": "People and plants", "kind": "Video", "description": "Learn more about photosynthesis and cellular respiration through a classic story: Jack and the Beanstalk. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "people-and-plants"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/the-bronchial-tree/", "id": "Z-yv3Yq4Aw4", "title": "The bronchial tree", "kind": "Video", "description": "Follow the path of an oxygen molecule as it makes its way from your mouth down to an alveolus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "the-bronchial-tree"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/inhaling-and-exhaling/", "id": "mykrnTh1tz8", "title": "Inhaling and exhaling", "kind": "Video", "description": "Find out exactly why air goes in and out of the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "inhaling-and-exhaling"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/how-does-lung-volume-change/", "id": "dTsUyXXudvA", "title": "How does lung volume change?", "kind": "Video", "description": "Learn about how muscle contraction and lung recoil actually help the lungs change their volume with every breath! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "how-does-lung-volume-change"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/thermoregulation-in-the-lungs/", "id": "Iya-2bS14ho", "title": "Thermoregulation in the lungs", "kind": "Video", "slug": "thermoregulation-in-the-lungs"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/the-lungs-and-pulmonary-system/", "id": "SPGRkexI_cs", "title": "The lungs and pulmonary system", "kind": "Video", "description": "The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles, alveoli and thoracic diaphragm", "slug": "the-lungs-and-pulmonary-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/lung-quiz/", "id": "lung-quiz", "title": "Introductory respiratory system quiz", "description": "Questions", "slug": "lung-quiz", "kind": "Exercise"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/intermediate-lung-quiz/", "id": "intermediate-lung-quiz", "title": "Intermediate respiratory system quiz", "description": "Intermediate Lung Quiz", "slug": "intermediate-lung-quiz", "kind": "Exercise"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction/advanced-lung-quiz/", "id": "advanced-lung-quiz", "title": "Advanced respiratory system quiz", "description": "Advanced Lung Quiz", "slug": "advanced-lung-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Did you know that your right lung is larger than your left? That\u2019s because the majority of your heart is on the left side of your body, and your left lung is slightly smaller to accommodate it. The lungs take in oxygen and help you breathe out carbon dioxide. Humans have an intricate respiratory system, with hundreds of millions of tiny air sacs called alveoli, where all of the magic happens. These videos will introduce you to the lungs, and show how they help you survive.", "node_slug": "lung_introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/lung_introduction", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/lung_introduction", "kind": "Topic", "slug": "lung_introduction"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/", "id": "Introduction-to-the-kidneys", "hide": false, "title": "Urinary system introduction", "child_data": [{"kind": "Video", "id": "xa816dcfa"}, {"kind": "Video", "id": "xebe4fd0a"}, {"kind": "Video", "id": "xbf40106d"}, {"kind": "Video", "id": "xcba65aa4"}, {"kind": "Video", "id": "xbdffddb5"}, {"kind": "Video", "id": "x7815c894"}, {"kind": "Video", "id": "24028"}, {"kind": "Video", "id": "24030"}, {"kind": "Exercise", "id": "x608bacc2"}, {"kind": "Exercise", "id": "xdb065348"}, {"kind": "Exercise", "id": "xec8a6280"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/meet-the-kidneys/", "id": "mcQQGGShmLs", "title": "Meet the kidneys!", "kind": "Video", "slug": "meet-the-kidneys"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/how-do-our-kidneys-work/", "id": "ctGkLYuUCvU", "title": "Kidney function and anatomy", "kind": "Video", "slug": "how-do-our-kidneys-work"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/glomerular-filtration-in-the-nephron/", "id": "wWsdcfGta4k", "title": "Glomerular filtration in the nephron", "kind": "Video", "slug": "glomerular-filtration-in-the-nephron"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/changing-glomerular-filtration-rate/", "id": "x0pFo1RxTzM", "title": "Changing glomerular filtration rate", "kind": "Video", "slug": "changing-glomerular-filtration-rate"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/countercurrent-multiplication-in-the-kidney/", "id": "Vqce2dtg45U", "title": "Countercurrent multiplication in the kidney", "kind": "Video", "slug": "countercurrent-multiplication-in-the-kidney"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/urination/", "id": "rheO1tVyB0U", "title": "Urination", "kind": "Video", "slug": "urination"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/the-kidney-and-nephron/", "id": "cc8sUv2SuaY", "title": "The kidney and nephron", "kind": "Video", "description": "Overview of how the nephrons in the kidney filter blood and reabsorb water and other molecules.", "slug": "the-kidney-and-nephron"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/secondary-active-transport-in-the-nephron/", "id": "czY5nyvZ7cU", "title": "Secondary active transport in the nephron", "kind": "Video", "description": "Secondary Active Transport in the Nephron", "slug": "secondary-active-transport-in-the-nephron"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-the-kidneys/introductory-renal-quiz/", "id": "introductory-renal-quiz", "title": "Introductory urinary system quiz", "description": "Introductory renal quiz", "slug": "introductory-renal-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "If you want to learn more about the renal system, then urine the right place! (Pun aside, the kidneys are about more than just making urine). Every thirty minutes, your kidneys filter the entire blood supply in your body. Imagine a dirty pool filled with algae. Placing a filter in this pool will cause the algae to be flushed out, and after a time you\u2019ll have a clean, crisp blue pool to enjoy. Just like the filter for a pool, our kidneys filter the blood and remove toxic wastes. These paired organs are key to maintaining electrolyte and water homeostasis in your body.", "node_slug": "Introduction-to-the-kidneys", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/Introduction-to-the-kidneys", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/Introduction-to-the-kidneys", "kind": "Topic", "slug": "introduction-to-the-kidneys"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/", "id": "introduction-to-hematologic", "hide": false, "title": "Hematologic system introduction", "child_data": [{"kind": "Video", "id": "1228258123"}, {"kind": "Video", "id": "23988"}, {"kind": "Video", "id": "x20edc5f4"}, {"kind": "Video", "id": "xa549333a"}, {"kind": "Video", "id": "xf7e04c5d"}, {"kind": "Video", "id": "23992"}, {"kind": "Video", "id": "1228218407"}, {"kind": "Video", "id": "1228367762"}, {"kind": "Video", "id": "1228242255"}, {"kind": "Video", "id": "x5780b274"}, {"kind": "Video", "id": "x6000b8a4"}, {"kind": "Video", "id": "1228432957"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/what-s-inside-of-blood/", "id": "5MOn8X-tyFw", "title": "What's inside of blood?", "kind": "Video", "description": "Spin down your blood and find out what it's made up of. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-s-inside-of-blood"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/red-blood-cells/", "id": "fLKOBQ6cZHA", "title": "Red blood cells", "kind": "Video", "description": "Oxygen uptake by hemoglobin in red blood cells", "slug": "red-blood-cells"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/blood-types/", "id": "Nnqp_3HMlDU", "title": "Blood types", "kind": "Video", "slug": "blood-types"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/blood-cell-lineages/", "id": "ddifthdMNVc", "title": "Blood cell lineages", "kind": "Video", "slug": "blood-cell-lineages"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/the-life-and-times-of-rbcs-and-platelets/", "id": "UBlem4dGLGU", "title": "Life and times of RBCs and platelets", "kind": "Video", "slug": "the-life-and-times-of-rbcs-and-platelets"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/hemoglobin/", "id": "LWtXthfG9_M", "title": "Hemoglobin", "kind": "Video", "description": "Hemoglobin and its role in the circulatory system", "slug": "hemoglobin"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/hemoglobin-moves-o2-and-co2/", "id": "QP8ImP6NCk8", "title": "Hemoglobin moves O2 and CO2", "kind": "Video", "description": "Learn the two ways that oxygen moves from the lungs to the tissues, and the three ways that carbon dioxide returns from the tissues to the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "hemoglobin-moves-o2-and-co2"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/fetal-hemoglobin-and-hematocrit/", "id": "SqE5S1qS7ZU", "title": "Fetal hemoglobin and hematocrit", "kind": "Video", "description": "Although mom controls the oxygen source, the fetus has a couple of clever tricks to get the most oxygen possible! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "fetal-hemoglobin-and-hematocrit"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/oxygen-content/", "id": "a19T5CX2b-g", "title": "Oxygen content", "kind": "Video", "description": "Learn how oxygen content (CaO2) is related to Hemoglobin concentration (Hb), oxygen saturation (SaO2), and the partial pressure of oxygen (PaO2). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "oxygen-content"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/how-do-we-make-blood-clots/", "id": "RQpBj8ebbNY", "title": "How do we make blood clots?", "kind": "Video", "slug": "how-do-we-make-blood-clots"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/coagulation-cascade/", "id": "FNVvQ788wzk", "title": "Coagulation cascade", "kind": "Video", "slug": "coagulation-cascade"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/bohr-effect-vs-haldane-effect/", "id": "dHi9ctwDUnc", "title": "Bohr effect vs. Haldane effect", "kind": "Video", "description": "Take a close look at how some friendly competition for Hemoglobin allows the body to more efficiently move oxygen and carbon Dioxide around. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "bohr-effect-vs-haldane-effect"}], "in_knowledge_map": false, "description": "Roughly 5 L of blood fill your arteries, veins, capillaries, and venules. What\u2019s it good for you ask? It carries oxygen to help your cells carry out respiration in addition to a number of other substances like lipids and hormones throughout the body. In cases of blood loss, such as trauma situations, the physician must be wary of the different blood types. We will explore the intricacies of the hematologic system here.", "node_slug": "introduction-to-hematologic", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic", "kind": "Topic", "slug": "introduction-to-hematologic"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/", "id": "introduction-to-immunology", "hide": false, "title": "Immunologic system introduction", "child_data": [{"kind": "Video", "id": "24012"}, {"kind": "Video", "id": "24014"}, {"kind": "Video", "id": "24016"}, {"kind": "Video", "id": "24018"}, {"kind": "Video", "id": "24020"}, {"kind": "Video", "id": "24022"}, {"kind": "Video", "id": "24024"}, {"kind": "Video", "id": "xa3c5171b"}, {"kind": "Video", "id": "x71bee542"}, {"kind": "Video", "id": "xe563beb3"}, {"kind": "Video", "id": "24026"}, {"kind": "Video", "id": "xcf8c6f8f"}, {"kind": "Exercise", "id": "x0f84951e"}, {"kind": "Exercise", "id": "x5c873eb0"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/role-of-phagocytes-in-innate-or-nonspecific-immunity/", "id": "O1N2rENXq_Y", "title": "Role of phagocytes in innate or nonspecific immunity", "kind": "Video", "description": "Role of phagocytes in innate or nonspecific immunity. Neutrophils, macrophages, and dendritic cells. MHC II.", "slug": "role-of-phagocytes-in-innate-or-nonspecific-immunity"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated/", "id": "rp7T4IItbtM", "title": "Types of immune responses: Innate and adaptive. humoral vs. cell-mediated", "kind": "Video", "description": "Overview of types of immune responses. Difference between innate and adaptive immunity. Differences between humoral adaptive immunity and cell-mediated adaptive immunity.", "slug": "types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/b-lymphocytes-b-cells/", "id": "Z36dUduOk1Y", "title": "B lymphocytes (B cells)", "kind": "Video", "description": "Overview of B cells (B lymphocytes) and how they are activated and produce antibodies", "slug": "b-lymphocytes-b-cells"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/professional-antigen-presenting-cells-apc-and-mhc-ii-complexes/", "id": "j_kSmmEpvQk", "title": "Professional antigen presenting cells (APC) and MHC II complexes", "kind": "Video", "description": "How professional antigen presenting cells present parts of engulfed pathogens on MHC II complexes (major histocompatibility complexes).", "slug": "professional-antigen-presenting-cells-apc-and-mhc-ii-complexes"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/helper-t-cells/", "id": "uwMYpTYsNZM", "title": "Helper T cells", "kind": "Video", "description": "Introduction to helper T cells and their role in activating B cells", "slug": "helper-t-cells"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/cytotoxic-t-cells/", "id": "oqI4skjr6lQ", "title": "Cytotoxic T cells", "kind": "Video", "description": "How cytotoxic T cells get activated by MHC-I/antigen complexes and then proceed to kill infected cells", "slug": "cytotoxic-t-cells"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/review-of-b-cells-cd4-t-cells-and-cd8-t-cells/", "id": "xaz5ftvZCyI", "title": "Review of B cells, CD4+ T cells and CD8+ T cells", "kind": "Video", "description": "Review of B cells, CD4+ T cells and CD8+ T cells", "slug": "review-of-b-cells-cd4-t-cells-and-cd8-t-cells"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/clonal-selection/", "id": "EsQyCHs4IBY", "title": "Clonal selection", "kind": "Video", "slug": "clonal-selection"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/self-versus-non-self/", "id": "afM6_VFaIss", "title": "Self vs. non-self immunity", "kind": "Video", "slug": "self-versus-non-self"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/how-white-blood-cells-move-around/", "id": "LXFQG4Ugreo", "title": "How white blood cells move around", "kind": "Video", "slug": "how-white-blood-cells-move-around"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/inflammatory-response/", "id": "FXSuEIMrPQk", "title": "Inflammatory response", "kind": "Video", "description": "Overview of the inflammatory response", "slug": "inflammatory-response"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology/rn-blood-cell-lineages/", "id": "97nFwkRiNCc", "title": "Blood cell lineages", "kind": "Video", "slug": "rn-blood-cell-lineages"}], "in_knowledge_map": false, "description": "Chances are, you\u2019ve had a fever or a cough at least once in your life (unless you live in a bubble, in which case you should probably go out more!) Have you ever wondered why your body reacts this way? Your body has a deadly arsenal of weapons against microbial invaders, ranging from bacteria and viruses to protozoans and fungi. We have specialized cells that destroy foreign bodies through mechanisms such as consumption, expulsion, and degradation. You will become acquainted with the interplay of the numerous soldiers in your body\u2019s army and how they keep you healthy!", "node_slug": "introduction-to-immunology", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/introduction-to-immunology", "kind": "Topic", "slug": "introduction-to-immunology"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/", "id": "Gastrointestinal-system-introduction", "hide": false, "title": "Gastrointestinal system introduction", "child_data": [{"kind": "Video", "id": "x9884099f"}, {"kind": "Video", "id": "x6ec16651"}, {"kind": "Video", "id": "x2aae6128"}, {"kind": "Video", "id": "xbb2d8ab9"}, {"kind": "Video", "id": "x854eb5a2"}, {"kind": "Video", "id": "x0370d7c8"}, {"kind": "Video", "id": "x2192aa78"}, {"kind": "Video", "id": "xafe158bf"}, {"kind": "Video", "id": "xb50aa618"}, {"kind": "Video", "id": "xd8f3feca"}, {"kind": "Video", "id": "x890d5926"}, {"kind": "Video", "id": "x947fab36"}, {"kind": "Video", "id": "x595c4214"}, {"kind": "Video", "id": "xa85063cd"}, {"kind": "Video", "id": "x64e79811"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/meet-the-gastrointestinal-tract/", "id": "Oh_Pt_UrtEE", "title": "Meet the gastrointestinal tract!", "kind": "Video", "slug": "meet-the-gastrointestinal-tract"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/mouth/", "id": "KyEk35-Uwh0", "title": "Mouth", "kind": "Video", "slug": "mouth"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/teeth/", "id": "9wYbsSrDwbA", "title": "Teeth", "kind": "Video", "slug": "teeth"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/esophagus/", "id": "wU9_daCwr_w", "title": "Esophagus", "kind": "Video", "slug": "esophagus"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/stomach/", "id": "OzLoUCCASwM", "title": "Stomach", "kind": "Video", "slug": "stomach"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/small-intestine-part-1/", "id": "UgnF1w-H8vw", "title": "Small intestine 1: Structure", "kind": "Video", "slug": "small-intestine-part-1"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/small-intestine-part-2-digestion/", "id": "nLCNoT79_-o", "title": "Small intestine 2: Digestion", "kind": "Video", "slug": "small-intestine-part-2-digestion"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/small-intestine-part-3-absorption/", "id": "7zq3s3F5Do8", "title": "Small intestine 3: Absorption", "kind": "Video", "slug": "small-intestine-part-3-absorption"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/liver/", "id": "rDjWrNRKfvg", "title": "Liver", "kind": "Video", "slug": "liver"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/hepatic-lobule/", "id": "nJfB32MtqBA", "title": "Hepatic lobule", "kind": "Video", "slug": "hepatic-lobule"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/biliary-tree/", "id": "jmfcACEGW-0", "title": "Biliary tree", "kind": "Video", "slug": "biliary-tree"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/exocrine-pancreas/", "id": "BtqlMr1rUT8", "title": "Exocrine pancreas", "kind": "Video", "slug": "exocrine-pancreas"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/endocrine-pancreas/", "id": "xNf--q0YMq8", "title": "Endocrine pancreas", "kind": "Video", "slug": "endocrine-pancreas"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/colon-rectum-anus/", "id": "Lzr9GGjh6YQ", "title": "Colon, rectum, and anus", "kind": "Video", "slug": "colon-rectum-anus"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/gastrointestinal-system-introduction/control-of-the-gi-tract/", "id": "_kfB2qKjdgM", "title": "Control of the GI tract", "kind": "Video", "slug": "control-of-the-gi-tract"}], "in_knowledge_map": false, "description": "Do you live to eat, or eat to live? Folks fall on both sides of this question, but who deny the powerful role that food and water play in our everyday lives. If we were cars, food and water would be the gasoline. Eating keeps us moving, laughing, playing, and learning. The energy from food is carefully extracted through a process of ingestion, digestion, and absorption, and requires one long (very long!) tube with a couple of key organs (liver, pancreas) sprouting off of it. Go ahead and grab a bite to eat before we get started\u2026", "node_slug": "Gastrointestinal-system-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/Gastrointestinal-system-introduction", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/Gastrointestinal-system-introduction", "kind": "Topic", "slug": "gastrointestinal-system-introduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/", "id": "nervous-system-introduction", "hide": false, "title": "Nervous system introduction", "child_data": [{"kind": "Video", "id": "xcbff8238"}, {"kind": "Video", "id": "23994"}, {"kind": "Video", "id": "x34e8d04e"}, {"kind": "Video", "id": "x7a518014"}, {"kind": "Video", "id": "23996"}, {"kind": "Video", "id": "27192"}, {"kind": "Video", "id": "xbfcf48e2"}, {"kind": "Video", "id": "x45263500"}, {"kind": "Video", "id": "x078b055b"}, {"kind": "Video", "id": "24002"}, {"kind": "Video", "id": "x0adae408"}, {"kind": "Video", "id": "x87ddf0ff"}, {"kind": "Video", "id": "xc550a5c4"}, {"kind": "Video", "id": "x5b1e791e"}, {"kind": "Video", "id": "xa9b71784"}, {"kind": "Video", "id": "xa82be47f"}, {"kind": "Video", "id": "xedf571fd"}, {"kind": "Video", "id": "xb67fb1c0"}, {"kind": "Video", "id": "x4125f8d9"}, {"kind": "Video", "id": "xfef2f16a"}, {"kind": "Video", "id": "xff5c3e85"}, {"kind": "Exercise", "id": "x8429d6ad"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/introduction-to-neural-cell-types/", "id": "L82bDTBMGUU", "title": "Introduction to neural cell types", "kind": "Video", "description": "This video provides an introduction to the cell types of the nervous system. By Matt Jensen.", "slug": "introduction-to-neural-cell-types"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/anatomy-of-a-neuron/", "id": "ob5U8zPbAX4", "title": "Anatomy of a neuron", "kind": "Video", "description": "Introduction to the neuron and its anatomy", "slug": "anatomy-of-a-neuron"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/overview-of-neuron-structure/", "id": "1h4kW8RX-6k", "title": "Overview of neuron structure", "kind": "Video", "description": "This video introduces the structure and structural types of neurons.\u00a0 By Matt Jensen.", "slug": "overview-of-neuron-structure"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/overview-of-neuron-function/", "id": "BY8DJeX_tGc", "title": "Overview of neuron function", "kind": "Video", "description": "This video introduces the function and functional types of neurons.\u00a0 By Matt Jensen.", "slug": "overview-of-neuron-function"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/sodium-potassium-pump/", "id": "C_H-ONQFjpQ", "title": "Sodium potassium pump", "kind": "Video", "description": "How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane", "slug": "sodium-potassium-pump"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/correction-to-sodium-and-potassium-pump-video/", "id": "ye3rTjLCvAU", "title": "Correction to sodium and potassium pump video", "kind": "Video", "description": "Correction to Sodium and Potassium Pump Video", "slug": "correction-to-sodium-and-potassium-pump-video"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/electrotonic-action-potential/", "id": "kY8FEq0teOs", "title": "Electrotonic and action potential", "kind": "Video", "slug": "electrotonic-action-potential"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/saltatory-conduction-neurons/", "id": "ikFUv-gdNLQ", "title": "Saltatory conduction in neurons", "kind": "Video", "slug": "saltatory-conduction-neurons"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/synapse-structure/", "id": "iqf3ft0mh1M", "title": "Synapse structure", "kind": "Video", "slug": "synapse-structure"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/neuronal-synapses-chemical/", "id": "Tbq-KZaXiL4", "title": "Neuronal synapses (chemical)", "kind": "Video", "description": "How one neuron can stimulate (or inhibit) another neuron at a chemical synapse", "slug": "neuronal-synapses-chemical"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/types-of-neurotransmitters/", "id": "FXYX_ksRwIk", "title": "Types of neurotransmitters", "kind": "Video", "slug": "types-of-neurotransmitters"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/types-of-neurotransmitter-receptors/", "id": "yg44T2HcA2o", "title": "Types of neurotransmitter receptors", "kind": "Video", "slug": "types-of-neurotransmitter-receptors"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/structure-of-the-nervous-system/", "id": "jmD0LBdAvlE", "title": "Structure of the nervous system", "kind": "Video", "slug": "structure-of-the-nervous-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/functions-of-the-nervous-system/", "id": "qrK-FBdjGk4", "title": "Functions of the nervous system", "kind": "Video", "slug": "functions-of-the-nervous-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/motor-unit/", "id": "vXb0ZvkFkS8", "title": "Motor unit", "kind": "Video", "slug": "motor-unit"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/peripheral-somatosensation/", "id": "oOIqk5hXBt4", "title": "Peripheral somatosensation", "kind": "Video", "slug": "peripheral-somatosensation"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/muscle-stretch-reflex/", "id": "Ya-3XHBWDqs", "title": "Muscle stretch reflex", "kind": "Video", "slug": "muscle-stretch-reflex"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/autonomic-nervous-system/", "id": "jA1NyCE4M2g", "title": "Autonomic nervous system", "kind": "Video", "slug": "autonomic-nervous-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/upper-motor-neurons/", "id": "aASSUcUSBro", "title": "Upper motor neurons", "kind": "Video", "slug": "upper-motor-neurons"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/somatosensory-tracts/", "id": "vrmKqH8d1RM", "title": "Somatosensory tracts", "kind": "Video", "slug": "somatosensory-tracts"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction/cerebral-cortex/", "id": "mGxomKWfJXs", "title": "Cerebral cortex", "kind": "Video", "slug": "cerebral-cortex"}], "in_knowledge_map": false, "description": "Neurons transmit information to one another through electrochemical signals. They make up the motor nerves that allow you to type an essay, the sensory nerves that let you feel a fluffy dog, and your brain, allowing to remember the content of this module. They have a number of helper cells, ranging from astrocytes, to microglia, to ependymal cells as well. You will come to appreciate the structure and function of neurons and the comrade cells which help to maintain the optimal function of the nervous system.", "node_slug": "nervous-system-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/nervous-system-introduction", "kind": "Topic", "slug": "nervous-system-introduction"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/", "id": "introduction-to-muscles", "hide": false, "title": "Muscular system introduction", "child_data": [{"kind": "Video", "id": "24004"}, {"kind": "Video", "id": "24006"}, {"kind": "Video", "id": "24008"}, {"kind": "Video", "id": "xc5597198"}, {"kind": "Video", "id": "1097595603"}, {"kind": "Video", "id": "xe87d0c16"}, {"kind": "Video", "id": "x71e0e24c"}, {"kind": "Video", "id": "xbb0cbe62"}, {"kind": "Video", "id": "1101443158"}, {"kind": "Video", "id": "x2ef4988a"}, {"kind": "Video", "id": "x794c36ac"}, {"kind": "Video", "id": "x7926b1ce"}, {"kind": "Exercise", "id": "xa5357b78"}, {"kind": "Exercise", "id": "x6adcd8f1"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/myosin-and-actin/", "id": "zopoN2i7ALQ", "title": "Myosin and actin", "kind": "Video", "description": "How myosin and actin interact to produce mechanical force.", "slug": "myosin-and-actin"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction/", "id": "LiOfeSsjrB8", "title": "Tropomyosin and troponin and their role in regulating muscle contraction", "kind": "Video", "description": "Tropomyosin and troponin and their role in regulating muscle contraction. How calcium ion concentration dictates whether a muscle is contracting or not.", "slug": "tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/role-of-the-sarcoplasmic-reticulum-in-muscle-cells/", "id": "SauhB2fYQkM", "title": "Role of the sarcoplasmic reticulum in muscle cells", "kind": "Video", "description": "The role of the sarcoplasmic reticulum in controlling calcium ion concentrations within the muscle cell.", "slug": "role-of-the-sarcoplasmic-reticulum-in-muscle-cells"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/anatomy-of-a-muscle-cell-1/", "id": "L-_MvjcH0xk", "title": "Anatomy of a muscle cell", "kind": "Video", "description": "Understanding the structure of a muscle cell. By Raja Narayan.", "slug": "anatomy-of-a-muscle-cell-1"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/three-types-of-muscle/", "id": "bwOE1MEginA", "title": "Three types of muscle", "kind": "Video", "description": "Understanding the structure of a muscle cell.", "slug": "three-types-of-muscle"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/motor-neurons/", "id": "LwA00uqniiU", "title": "Motor neurons", "kind": "Video", "description": "How do neurons help us move? Learn about how motor neurons send signals to muscle cells and what happens when we damage this precious neurons. By Raja Narayan.", "slug": "motor-neurons"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/neuromuscular-junction/", "id": "lRJd56BCidg", "title": "Neuromuscular junction, motor end-plate", "kind": "Video", "description": "How do neurons talk directly to muscle cells? Learn about how a neuronal message is translated into a muscular action at the neuromuscular junction. By Raja Narayan.", "slug": "neuromuscular-junction"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/type-1-and-2-muscle-fibers/", "id": "l5yMz2lFgx0", "title": "Type 1 and type 2 muscle fibers", "kind": "Video", "description": "What's the difference between type 1 and type 2 muscle fibers? Learn one golden rule that will help you easily distinguish between them. By Raja Narayan.", "slug": "type-1-and-2-muscle-fibers"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/calcium-puts-myosin-to-work/", "id": "vv6WBeqw2Nc", "title": "Calcium puts myosin to work", "kind": "Video", "description": "See exactly how Calcium binds Troponin-C and allows Myosin to do some work.", "slug": "calcium-puts-myosin-to-work"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/muscle-innervation/", "id": "NqasGo5q5yQ", "title": "Muscle innervation", "kind": "Video", "description": "Which muscles do we voluntarily control? Which muscles do we have NO control over? What's the difference between sympathetic and parasympathetic innervation? Learn about how our brain splits its control over the body into autonomic and somatic nervous systems.\u00a0 By Raja Narayan.", "slug": "muscle-innervation"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/autonomic-somatic-nervous-system/", "id": "ye28W_OygOw", "title": "Autonomic vs somatic nervous system", "kind": "Video", "description": "Understand the different divisions of the brain that control our muscles.\u00a0 By Raja Narayan.", "slug": "autonomic-somatic-nervous-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/thermoregulation-by-muscles/", "id": "HfXqyPS5bRo", "title": "Thermoregulation by muscles", "kind": "Video", "description": "Why do we shiver when it's cold? How do our muscles make sure we don't freeze or have a heat stroke? Learn how the skin, brain, blood vessels, and muscles work together to maintain our core body temperature.\u00a0 By Raja Narayan.", "slug": "thermoregulation-by-muscles"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/introductory-muscular-quiz/", "id": "introductory-muscular-quiz", "title": "Introductory musculatory system quiz", "description": "Introductory muscle quiz", "slug": "introductory-muscular-quiz", "kind": "Exercise"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles/advanced-muscular-quiz/", "id": "advanced-muscular-quiz", "title": "Advanced musculatory system quiz", "description": "Advanced muscular quiz", "slug": "advanced-muscular-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Muscles never sleep (literally). If you have ever taken a breath, you have benefited from the work of the diaphragm, which contracts to create an area of low pressure within your thoracic cavity, allowing air in. How exactly are some weightlifters able to support 717 lbs without breaking anything more than a little sweat? Fun fact: the largest muscle in your body is the gluteus maximus (that\u2019s your butt) while the smallest skeletal muscle is the stapedius (it stabilizes the smallest bone, the stapes, which is in your middle ear).", "node_slug": "introduction-to-muscles", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/introduction-to-muscles", "kind": "Topic", "slug": "introduction-to-muscles"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/skeletal-system/", "id": "skeletal-system", "hide": false, "title": "Skeletal system introduction", "child_data": [{"kind": "Video", "id": "x5e2ec71a"}, {"kind": "Video", "id": "x2354d3d6"}, {"kind": "Video", "id": "xf10511b3"}, {"kind": "Video", "id": "x3b4aac33"}, {"kind": "Video", "id": "xcfe8f34b"}, {"kind": "Video", "id": "xd846e40a"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/skeletal-system/skeletal-structure-and-function/", "id": "muiNDpURT9M", "title": "Skeletal structure and function", "kind": "Video", "slug": "skeletal-structure-and-function"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/skeletal-system/microscopic-structure-of-bone-haversian-system/", "id": "6_PP49FuyTM", "title": "Microscopic structure of bone - the Haversian system", "kind": "Video", "slug": "microscopic-structure-of-bone-haversian-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/skeletal-system/cellular-structure-of-bone/", "id": "um6_5re9XU0", "title": "Cellular structure of bone", "kind": "Video", "slug": "cellular-structure-of-bone"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/skeletal-system/skeletal-endocrine-control/", "id": "j3oBvc3lKsY", "title": "Skeletal endocrine control", "kind": "Video", "slug": "skeletal-endocrine-control"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/skeletal-system/cartilage/", "id": "5kpVQqV7EV8", "title": "Cartilage", "kind": "Video", "slug": "cartilage"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/skeletal-system/ligaments-tendons-and-joints/", "id": "nxfWL0TR5H4", "title": "Ligaments, tendons, and joints", "kind": "Video", "slug": "ligaments-tendons-and-joints"}], "in_knowledge_map": false, "description": "Were it not for your skeleton, you and I would be a mere sack of flesh. You will come to appreciate that the bones, together with muscles, are a scaffolding for your body. We will also explore their endocrine function, especially with regards to calcium and phosphate homeostasis. Fun fact: the bone most broken is the clavicle (AKA collar bone).", "node_slug": "skeletal-system", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/skeletal-system", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/skeletal-system", "kind": "Topic", "slug": "skeletal-system"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hormones/", "id": "introduction to hormones", "hide": false, "title": "Endocrine system introduction", "child_data": [{"kind": "Video", "id": "xaf2ad25b"}, {"kind": "Video", "id": "x26e9c294"}, {"kind": "Video", "id": "xcdd0a401"}, {"kind": "Video", "id": "x9ff1d77e"}, {"kind": "Video", "id": "xd4489fab"}, {"kind": "Exercise", "id": "x42b274c6"}, {"kind": "Exercise", "id": "xfea09233"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hormones/endocrine-gland-hormone-review/", "id": "ER49EweKwW8", "title": "Endocrine gland hormone review", "kind": "Video", "description": "Welcome to the Endocrine System. Get ready to learn about one of the most important ways that our body parts communicate! By Ryan Patton.", "slug": "endocrine-gland-hormone-review"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hormones/hypothalamus-and-pituitary-gland/", "id": "9dS7bc_2bUE", "title": "The hypothalamus and pituitary gland", "kind": "Video", "description": "What makes the endocrine organs tick? Find out in this video about the hypothalamus and pituitary glands! \u00a0By Ryan Patton.", "slug": "hypothalamus-and-pituitary-gland"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hormones/hormone-concentration-metabolism-negative-feedback/", "id": "RycF0ub2Al0", "title": "Hormone concentration metabolism and negative feedback", "kind": "Video", "description": "In this video we're going to learn about how the concentration of hormones in our blood is regulated. By Ryan Patton.", "slug": "hormone-concentration-metabolism-negative-feedback"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hormones/types-of-hormones/", "id": "KSclrkk_Ako", "title": "Types of hormones", "kind": "Video", "description": "There are three major types of hormones, based on structure, in our body. Lets find out a little more about them. By Ryan Patton.", "slug": "types-of-hormones"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hormones/cellular-mechanism-hormone-action/", "id": "TNGSzt2v4xY", "title": "Cellular mechanism of hormone action", "kind": "Video", "description": "Learn about the interaction between chemical messages and their target cells in this video about hormone action. By Ryan Patton.", "slug": "cellular-mechanism-hormone-action"}], "in_knowledge_map": false, "description": "Glands are special organs that secrete chemical messages called hormones, which seep into the blood - it\u2019s like putting a tea bag in hot water. As the heart pumps, this blood carries these chemical messages throughout the body, allowing the hormones to interact with specific target cells and organs. Endocrine glands help us to maintain our appetites, grow up, metabolize molecules, concentrate urine,- and oh, so much more! We will examine how these variegated hormones play a role in homeostasis as the body responds to a changing environment.", "node_slug": "introduction to hormones", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/introduction to hormones", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/introduction to hormones", "kind": "Topic", "slug": "introduction-to-hormones"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/", "id": "integumentary-system-introduction", "hide": false, "title": "Integumentary system introduction", "child_data": [{"kind": "Video", "id": "xbcdaefeb"}, {"kind": "Video", "id": "x23a3b3fe"}, {"kind": "Video", "id": "x19e6aeea"}, {"kind": "Video", "id": "xb8babf76"}, {"kind": "Video", "id": "xf641d7d7"}, {"kind": "Video", "id": "1022193589"}, {"kind": "Video", "id": "x98d6edc4"}, {"kind": "Video", "id": "x1e0f9664"}, {"kind": "Video", "id": "x3c61aa8e"}, {"kind": "Video", "id": "x7f17449b"}, {"kind": "Video", "id": "x7926b1ce"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/meet-the-skin/", "id": "4zKjzl0futI", "title": "Meet the skin! (Overview)", "kind": "Video", "slug": "meet-the-skin"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/what-is-skin/", "id": "TjYbFdSY0LA", "title": "What is skin? (Epidermis)", "kind": "Video", "slug": "what-is-skin"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/what-lies-beneath-the-epidermis-dermis-and-hypodermis/", "id": "Vn-tOBUvnD8", "title": "What lies beneath the epidermis? (Dermis and Hypodermis)", "kind": "Video", "slug": "what-lies-beneath-the-epidermis-dermis-and-hypodermis"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/where-do-our-nails-and-hair-come-from/", "id": "RD0waXH62AI", "title": "Where do our nails and hair come from?", "kind": "Video", "slug": "where-do-our-nails-and-hair-come-from"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/whats-in-sweat-holocrine-apocrine-and-merocrine-glands/", "id": "A44_Sqifi0U", "title": "What's in sweat? (Holocrine, Apocrine, Merocrine Glands)", "kind": "Video", "slug": "whats-in-sweat-holocrine-apocrine-and-merocrine-glands"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/lebron-asks-why-does-sweating-cool-you-down/", "id": "jgnNhL2jSXY", "title": "LeBron Asks: Why does sweating cool you down?", "kind": "Video", "description": "LeBron asks Sal why sweating helps cool the body down.", "slug": "lebron-asks-why-does-sweating-cool-you-down"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/overview-of-sensation-and-meissners-corpuscles/", "id": "0-pHx5rKKqI", "title": "Overview of Sensation and Meissner's Corpuscle", "kind": "Video", "slug": "overview-of-sensation-and-meissners-corpuscles"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/pacinians-corpuscle-and-merkels-disk/", "id": "IW8OnV8J2Qw", "title": "Pacinian's Corpuscle and Merkel's Disk", "kind": "Video", "slug": "pacinians-corpuscle-and-merkels-disk"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/ruffinis-ending-and-hair-follicle-receptor-2/", "id": "k9cj_rZO448", "title": "Ruffini's Ending and Hair Follicle Receptor", "kind": "Video", "slug": "ruffinis-ending-and-hair-follicle-receptor-2"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/pain-and-temperature-1/", "id": "D-oAsFIHqbY", "title": "Pain and temperature", "kind": "Video", "description": "Explore our senses of pain & temperature. \u00a0By Ron.", "slug": "pain-and-temperature-1"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/thermoregulation-by-muscles/", "id": "HfXqyPS5bRo", "title": "Thermoregulation by muscles", "kind": "Video", "description": "Why do we shiver when it's cold? How do our muscles make sure we don't freeze or have a heat stroke? Learn how the skin, brain, blood vessels, and muscles work together to maintain our core body temperature.\u00a0 By Raja Narayan.", "slug": "thermoregulation-by-muscles"}], "in_knowledge_map": false, "description": "There is really more than meets the eye with skin. Yes, it does make us look nicer than a bag of bones, muscles, and organs. But it also serves other important purposes which range from guarding the body against infection to sensation to allowing for metabolism of vitamin D. We will explore the structure and function of skin from the macroscopic to the microscopic level in this tutorial.", "node_slug": "integumentary-system-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction", "kind": "Topic", "slug": "integumentary-system-introduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lymphatics/", "id": "lymphatics", "hide": false, "title": "Lymphatic system introduction", "child_data": [{"kind": "Video", "id": "xd0841695"}, {"kind": "Video", "id": "xb6494b98"}, {"kind": "Video", "id": "x6b3d6ec8"}, {"kind": "Video", "id": "xefd7202b"}, {"kind": "Video", "id": "xcefa425b"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lymphatics/why-do-we-need-a-lymphatic-system/", "id": "_GinTV94hUk", "title": "Why we need a lymphatic system", "kind": "Video", "description": "Welcome to the lymphatic system! Find out why we need it, and how it interacts with our blood vessels. By Patrick van Nieuwenhuizen.", "slug": "why-do-we-need-a-lymphatic-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lymphatics/lymphatic-vessels-move-fluid/", "id": "CLneY6SoPi0", "title": "How lymphatic vessels move fluid", "kind": "Video", "description": "Find out how the body's mysterious second circulatory system works. Learn how it can move fluid even when it has no heart of its own. By Patrick van Nieuwenhuizen.", "slug": "lymphatic-vessels-move-fluid"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lymphatics/lymphatic-system-immunity/", "id": "kjLwVqxwaIM", "title": "The lymphatic system's role in immunity", "kind": "Video", "description": "Learn about how B and T cells reside in lymph nodes. Find out how that enables them to get a preview of what they need to be prepared to fight. By Patrick van Nieuwenhuizen.", "slug": "lymphatic-system-immunity"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lymphatics/lipid-and-protein-transport-lymphatic-system/", "id": "EHUlWm0kFTA", "title": "Lipid and protein transport in the lymphatic system", "kind": "Video", "description": "Learn about a third function of the lymphatic system. See how it finds a sneaky way to get fats and proteins into your bloodstream. By Patrick van Nieuwenhuizen.", "slug": "lipid-and-protein-transport-lymphatic-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/lymphatics/what-is-lymph/", "id": "2Bq2xopLew8", "title": "What is actually in lymph", "kind": "Video", "description": "Learn about the differences between lymph and blood. Find out what is actually in lymph, and how it might be different across your body. By Patrick van Nieuwenhuizen.", "slug": "what-is-lymph"}], "in_knowledge_map": false, "description": "Your heart pumps roughly 20 L of blood throughout the day to your tissues. The plasma component of blood (not containing blood cells) leaks out through capillaries (the tiniest of blood vessels) and is mostly reabsorbed. However, about 3L of the plasma is left behind in fluid surrounding tissues, and it is the job of the hard-working lymphatic system to bring back this fluid to the circulatory system. The lymphatic system moves fluid in one direction, but without the force of a pump like the heart.", "node_slug": "lymphatics", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/lymphatics", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/lymphatics", "kind": "Topic", "slug": "lymphatics"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/", "id": "reproductive-system-introduction", "hide": false, "title": "Reproductive system introduction", "child_data": [{"kind": "Video", "id": "x765c2a69"}, {"kind": "Video", "id": "x6d80ffca"}, {"kind": "Video", "id": "x5701261a"}, {"kind": "Video", "id": "xc50a9018"}, {"kind": "Video", "id": "xb4562311"}, {"kind": "Video", "id": "x692b7bba"}, {"kind": "Video", "id": "xf4dafb4e"}, {"kind": "Video", "id": "1192840523"}, {"kind": "Video", "id": "x2accaf63"}, {"kind": "Video", "id": "xdcc4fd4d"}, {"kind": "Video", "id": "x2cd75462"}, {"kind": "Video", "id": "x1e317267"}, {"kind": "Video", "id": "x7b808228"}, {"kind": "Video", "id": "x2ba850e1"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/welcome-to-the-reproductive-system/", "id": "jRYEqOOrjH8", "title": "Welcome to the reproductive system", "kind": "Video", "slug": "welcome-to-the-reproductive-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/anatomy-of-the-male-reproductive-system/", "id": "_ce-IVjQYws", "title": "Anatomy of the male reproductive system", "kind": "Video", "slug": "anatomy-of-the-male-reproductive-system"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/transport-of-sperm-via-erection-and-ejaculation/", "id": "XLoLvz0r550", "title": "Transport of sperm via erection and ejaculation", "kind": "Video", "slug": "transport-of-sperm-via-erection-and-ejaculation"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/spermatogenesis/", "id": "QUJ-xnv53UM", "title": "Spermatogenesis", "kind": "Video", "slug": "spermatogenesis"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/testosterone/", "id": "k4e70nG3T8U", "title": "Testosterone", "kind": "Video", "slug": "testosterone"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/basics-of-egg-development/", "id": "Msrym4oGVSk", "title": "Basics of egg development", "kind": "Video", "slug": "basics-of-egg-development"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/the-ovarian-cycle/", "id": "VYSFNwTUkG0", "title": "The ovarian cycle", "kind": "Video", "slug": "the-ovarian-cycle"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/meet-the-placenta/", "id": "bQioHx12JuY", "title": "Meet the placenta!", "kind": "Video", "description": "Learn how the needs of the fetus are met by the placenta, which is a special organ that belongs to both the mother and the fetus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-placenta"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/reproductive-cycle-graph-follicular-phase/", "id": "gmKAuceSf-s", "title": "Reproductive cycle graph - Follicular phase", "kind": "Video", "slug": "reproductive-cycle-graph-follicular-phase"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/reproductive-cycle-graph-luteal-phase/", "id": "uA7Xny276sk", "title": "Reproductive cycle graph - Luteal phase", "kind": "Video", "slug": "reproductive-cycle-graph-luteal-phase"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/estrogen/", "id": "eK7Gp6AWnuY", "title": "Estrogen", "kind": "Video", "slug": "estrogen"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/maternal-changes-in-pregnancy/", "id": "A0sp7I9rlz8", "title": "Maternal changes in pregnancy", "kind": "Video", "slug": "maternal-changes-in-pregnancy"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/labor-parturition/", "id": "GxQAAqRzwNw", "title": "Labor (parturition)", "kind": "Video", "slug": "labor-parturition"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction/breast-anatomy-and-lactation/", "id": "bflHwVKgRNE", "title": "Breast anatomy and lactation", "kind": "Video", "slug": "breast-anatomy-and-lactation"}], "in_knowledge_map": false, "description": "Our genes are survivors. Even though a person might die, his or her genes will go on to the next generation and then the next generation\u2026 Some genes are exactly the same as the ones in your great-great-great-grandmother! Yet, with the exception of identical twins, we are all genetically distinct from our family members. Starting with sexual reproduction and then the development of a baby, we\u2019re going to take a journey that starts with our own microscopic beginning, and ends with a fully formed baby entering the world.", "node_slug": "reproductive-system-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/reproductive-system-introduction", "kind": "Topic", "slug": "reproductive-system-introduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/", "id": "pregnancy", "hide": false, "title": "Pregnancy and pregnancy complications", "child_data": [{"kind": "Video", "id": "x380dab05"}, {"kind": "Video", "id": "x77eb3f28"}, {"kind": "Video", "id": "x31a4d3bc"}, {"kind": "Video", "id": "x0ad026e6"}, {"kind": "Video", "id": "xaf91f593"}, {"kind": "Video", "id": "x787d0f51"}, {"kind": "Video", "id": "xec8bbf07"}, {"kind": "Video", "id": "xe22de1f5"}, {"kind": "Video", "id": "xbf2a59a1"}, {"kind": "Video", "id": "x5b734914"}, {"kind": "Video", "id": "x6b79265f"}, {"kind": "Video", "id": "x022fd0b9"}, {"kind": "Video", "id": "x4da554f5"}, {"kind": "Video", "id": "x40f0d8b1"}, {"kind": "Video", "id": "xfcdccc9d"}, {"kind": "Video", "id": "x9de2a6ca"}], "children": [{"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/diagnosis-of-pregnancy/", "id": "OnlHXSBv0M4", "title": "Diagnosis of pregnancy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-of-pregnancy"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/pregnancy-physiology-i/", "id": "IKRT-boQTr0", "title": "Pregnancy physiology I", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pregnancy-physiology-i"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/labor/", "id": "Bf04LcSBpDw", "title": "Labor", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "labor"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/postpartum-physiology/", "id": "wfnefFAmYjg", "title": "Postpartum physiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "postpartum-physiology"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/preeclampsia/", "id": "70tpqg58Oug", "title": "Preeclampsia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preeclampsia"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/placenta-previa/", "id": "DMCowipIXgE", "title": "Placenta previa", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "placenta-previa"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/placental-abruption/", "id": "79NnsYrAXz4", "title": "Placental abruption", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "placental-abruption"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/placenta-accreta/", "id": "x3EMTQQjoA0", "title": "Placenta accreta", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "placenta-accreta"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/utis-in-pregnancy/", "id": "YEQNnO64wLc", "title": "UTIs in pregnancy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "utis-in-pregnancy"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/blood-conditions-in-pregnancy/", "id": "e4baNHUxP8I", "title": "Blood conditions in pregnancy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "blood-conditions-in-pregnancy"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/sheehan-syndrome/", "id": "1exN1kFX2wI", "title": "Sheehan syndrome", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "sheehan-syndrome"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/postpartum-hemorrhage/", "id": "ZSLMm5KNGEc", "title": "Postpartum hemorrhage", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "postpartum-hemorrhage"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/uterine-inversion/", "id": "OW0Yq2nWyuY", "title": "Uterine inversion", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "uterine-inversion"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/diabetes-in-pregnancy/", "id": "N3jnRuzseoM", "title": "Diabetes in pregnancy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diabetes-in-pregnancy"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/preterm-labor/", "id": "lt3nPxVTC5M", "title": "Preterm labor", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preterm-labor"}, {"path": "khan/science/health-and-medicine/human-anatomy-and-physiology/pregnancy/c-section/", "id": "NQFiGK0M69s", "title": "C-section", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "c-section"}], "in_knowledge_map": false, "description": "", "node_slug": "pregnancy", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology/pregnancy", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology/pregnancy", "kind": "Topic", "slug": "pregnancy"}], "in_knowledge_map": false, "description": "Get introduced to all of the major organ systems of the body. You'll learn some general anatomy (roadmap for your body), and how the organs work to keep you alive! Watch some videos, read some articles, try some flashcards, and then quiz yourself!", "node_slug": "human-anatomy-and-physiology", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/human-anatomy-and-physiology", "extended_slug": "science/health-and-medicine/human-anatomy-and-physiology", "kind": "Topic", "slug": "human-anatomy-and-physiology"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/health-and-medicine/circulatory-system/", "id": "circulatory-system", "hide": false, "title": "Advanced circulatory system physiology", "child_data": [{"kind": "Topic", "id": "xbbe431ea"}, {"kind": "Topic", "id": "x27b3f6ab"}, {"kind": "Topic", "id": "x9c98f570"}, {"kind": "Topic", "id": "x3e8aeab7"}, {"kind": "Topic", "id": "xb9efce3a"}, {"kind": "Topic", "id": "x243835e6"}, {"kind": "Topic", "id": "xe1a3ead8"}, {"kind": "Topic", "id": "xb0d8cc8f"}, {"kind": "Topic", "id": "x4d0eb449"}, {"kind": "Topic", "id": "x8c6b9867"}, {"kind": "Topic", "id": "xbc61f732"}, {"kind": "Topic", "id": "xda292f80"}, {"kind": "Topic", "id": "x2c626a6e"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/", "id": "circulatory-system-introduction", "hide": false, "title": "Circulatory system introduction", "child_data": [{"kind": "Video", "id": "1081136975"}, {"kind": "Video", "id": "1081230475"}, {"kind": "Video", "id": "1192377802"}, {"kind": "Article", "id": "x21bb0cee"}, {"kind": "Video", "id": "1081112668"}, {"kind": "Video", "id": "1081260395"}, {"kind": "Video", "id": "x0c625f6c"}, {"kind": "Video", "id": "1036157588"}, {"kind": "Video", "id": "x7ac317cf"}, {"kind": "Video", "id": "23990"}, {"kind": "Exercise", "id": "x884b831c"}, {"kind": "Exercise", "id": "x56804c27"}, {"kind": "Exercise", "id": "xd5d0fcc3"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/meet-the-heart/", "id": "Vi1JK6IYVt8", "title": "Meet the heart!", "kind": "Video", "description": "Find out exactly where the heart rests in your body and what it does. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-heart"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/flow-through-the-heart/", "id": "7XaftdE_h60", "title": "Flow through the heart", "kind": "Video", "description": "Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "flow-through-the-heart"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/two-circulations-in-the-body/", "id": "K57qjYYjgIY", "title": "Two circulations in the body", "kind": "Video", "description": "Learn the difference between the pulmonary and systemic circulatory systems in the body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "two-circulations-in-the-body"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/lub-dub/", "id": "-4kGMI-qQ3I", "title": "Lub dub", "kind": "Video", "description": "Ever wonder why the heart sounds the way that it does? Opening and closing of heart valves makes the heart rhythm come alive with its lub dub beats... Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "lub-dub"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/layers-of-the-heart/", "id": "bm65xCS5ivo", "title": "Layers of the heart", "kind": "Video", "description": "Take a closer look at the heart, explore some of its interesting features and get to know the three layers that make up the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "layers-of-the-heart"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/thermoregulation-in-the-circulatory-system/", "id": "C_LiAEjuIIc", "title": "Thermoregulation in the circulatory system", "kind": "Video", "slug": "thermoregulation-in-the-circulatory-system"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/arteries-vs-veins-what-s-the-difference/", "id": "7b6LRebCgb4", "title": "Arteries vs. veins - what's the difference?", "kind": "Video", "description": "Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arteries-vs-veins-what-s-the-difference"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/arteries-arterioles-venules-and-veins/", "id": "iqRTd1NY-pU", "title": "Arteries, arterioles, venules, and veins", "kind": "Video", "description": "Learn the differences between these blood vessels! Rishi is a pediatric infectious disease physician and works at Khan Academy. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "arteries-arterioles-venules-and-veins"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/circulatory-system-and-the-heart/", "id": "QhiVnFvshZg", "title": "Circulatory system and the heart", "kind": "Video", "description": "Introduction to the circulatory system and the heart", "slug": "circulatory-system-and-the-heart"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/heart-quiz/", "id": "heart-quiz", "title": "Introductory circulatory system quiz", "slug": "heart-quiz", "kind": "Exercise"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/intermediate-circulatory-system-quiz/", "id": "intermediate-circulatory-system-quiz", "title": "Intermediate Circulatory System Quiz", "description": "Intermediate Circulatory System Quiz", "slug": "intermediate-circulatory-system-quiz", "kind": "Exercise"}, {"path": "khan/science/health-and-medicine/circulatory-system/circulatory-system-introduction/advanced-heart-quiz/", "id": "advanced-heart-quiz", "title": "Advanced circulatory system quiz", "description": "Advanced heart quiz", "slug": "advanced-heart-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "No organ quite symbolizes love like the heart. One reason may be that your heart helps you live, by moving ~5 liters (1.3 gallons) of blood through almost 100,000 kilometers (62,000 miles) of blood vessels every single minute! It has to do this all day, everyday, without ever taking a vacation! Now that is true love. Learn about how the heart works, how blood flows through the heart, where the blood goes after it leaves the heart, and what your heart is doing when it makes the sound \u201cLub Dub.\u201d", "node_slug": "circulatory-system-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/circulatory-system-introduction", "extended_slug": "science/health-and-medicine/circulatory-system/circulatory-system-introduction", "kind": "Topic", "slug": "circulatory-system-introduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/blood_pressure/", "id": "blood_pressure", "hide": false, "title": "Blood pressure", "child_data": [{"kind": "Video", "id": "1035877811"}, {"kind": "Video", "id": "1036248186"}, {"kind": "Video", "id": "1036250178"}, {"kind": "Video", "id": "1036040971"}, {"kind": "Video", "id": "1036034566"}, {"kind": "Video", "id": "1192925086"}, {"kind": "Video", "id": "1036166642"}, {"kind": "Video", "id": "1036127574"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure/what-is-blood-pressure-1/", "id": "J97G6BeYW0I", "title": "What is blood pressure?", "kind": "Video", "description": "Find out what a systolic and diastolic blood pressure mean. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-blood-pressure-1"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure/learn-how-a-stethoscope-can-help-determine-blood-pressure/", "id": "A8xO92u0VFs", "title": "Learn how a stethoscope can help determine blood pressure", "kind": "Video", "description": "Learn how Dr. Korotkoff cleverly used a stethoscope to determine blood pressure, and that we still use his trick today! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "learn-how-a-stethoscope-can-help-determine-blood-pressure"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure/resistance-in-a-tube/", "id": "8X7yEzgurP8", "title": "Resistance in a tube", "kind": "Video", "description": "Learn how the size of a tube (it's radius) is related to its resistance to something flowing through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "resistance-in-a-tube"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure/adding-up-resistance-in-series-and-in-parallel/", "id": "E-q9JpkGc-8", "title": "Adding up resistance in series and in parallel", "kind": "Video", "description": "Learn about how resistance can be added up in series and in parallel (similar to electrical circuits!). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adding-up-resistance-in-series-and-in-parallel"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure/adding-up-resistance-problem/", "id": "5lXw5_4R2B4", "title": "Adding up resistance problem", "kind": "Video", "description": "Here's a chance to see if you can combine what you know to add up resistance in series AND in parallel. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adding-up-resistance-problem"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure/flow-and-perfusion/", "id": "ePwN6rHhNyU", "title": "Flow and perfusion", "kind": "Video", "description": "Learn the difference between blood flow (Volume/time) and perfusion (Volume/time/amount of tissue). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "flow-and-perfusion"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure/putting-it-all-together-pressure-flow-and-resistance/", "id": "F2uzWHppVrk", "title": "Putting it all together: Pressure, flow, and resistance", "kind": "Video", "description": "See how pressure, flow, and resistance relate to one another and how they each affect the human body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "putting-it-all-together-pressure-flow-and-resistance"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure/blood-pressure-changes-over-time/", "id": "fy_muPF0390", "title": "Blood pressure changes over time", "kind": "Video", "description": "See how increasing resistance in the blood vessels can cause blood pressure to rise over time. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "blood-pressure-changes-over-time"}], "in_knowledge_map": false, "description": "Using the stethoscope to check blood pressure is a technique that\u2019s been used for >100 years! Blood pressure is one of the major vital signs frequently measured by health care workers, and it tells us a lot about our blood circulation. Learn what blood pressure is, how it relates to resistance in a tube, why it is necessary to get oxygen to your cells, and how it can change as you age. We\u2019ll finally put it all together by relating pressure, flow, and resistance in one awesome equation!", "node_slug": "blood_pressure", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/blood_pressure", "extended_slug": "science/health-and-medicine/circulatory-system/blood_pressure", "kind": "Topic", "slug": "blood_pressure"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/", "id": "blood_pressure_control", "hide": false, "title": "Blood pressure control", "child_data": [{"kind": "Video", "id": "1036230273"}, {"kind": "Video", "id": "1036126972"}, {"kind": "Video", "id": "1047183569"}, {"kind": "Video", "id": "1047335429"}, {"kind": "Video", "id": "1047465049"}, {"kind": "Video", "id": "1047330622"}, {"kind": "Video", "id": "1047114997"}, {"kind": "Video", "id": "1047406243"}, {"kind": "Video", "id": "1047456036"}, {"kind": "Video", "id": "1047327652"}, {"kind": "Video", "id": "1058371798"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/regulation-of-blood-pressure-with-baroreceptors/", "id": "ajLgwCygHsc", "title": "Regulation of blood pressure with baroreceptors", "kind": "Video", "description": "Learn about how the arteries use nerve impulses to help regulate blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "regulation-of-blood-pressure-with-baroreceptors"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/parts-of-a-nephron/", "id": "_vBJkK4eocA", "title": "Parts of a nephron", "kind": "Video", "description": "Learn about the 5 major parts of the kidney's nephron. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "parts-of-a-nephron"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/general-overview-of-the-raas-system-cells-and-hormones/", "id": "BVUeCLt68Ik", "title": "General overview of the RAAS system: Cells and hormones", "kind": "Video", "description": "Learn the important cells and hormones that are working together to control your blood pressure! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "general-overview-of-the-raas-system-cells-and-hormones"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/renin-production-in-the-kidneys/", "id": "AtlhAhONHyM", "title": "Renin production in the kidneys", "kind": "Video", "description": "Learn the three major triggers for Renin production by the Juxtaglomerular cells. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "renin-production-in-the-kidneys"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/activating-angiotensin-2/", "id": "cUVS0AlRyw8", "title": "Activating angiotensin 2", "kind": "Video", "description": "See how Renin and ACE work to cut Angiotensinogen down to size! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "activating-angiotensin-2"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/angiotensin-2-raises-blood-pressure/", "id": "Oges5YqDLHY", "title": "Angiotensin 2 raises blood pressure", "kind": "Video", "description": "See how Angiotensin 2 effects 4 target \"organs\" to increase blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "angiotensin-2-raises-blood-pressure"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/aldosterone-raises-blood-pressure-and-lowers-potassium/", "id": "64_ZfIemRGM", "title": "Aldosterone raises blood pressure and lowers potassium", "kind": "Video", "description": "See how Aldosterone effects the principal cells of the kidney to raise BP and lower potassium. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-raises-blood-pressure-and-lowers-potassium"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/aldosterone-removes-acid-from-the-blood/", "id": "7HTy-6NLWGM", "title": "Aldosterone removes acid from the blood", "kind": "Video", "description": "See how Aldosterone acts on the alpha-intercalated cell to remove protons (acid) from the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-removes-acid-from-the-blood"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/adh-secretion/", "id": "8dQdfbE8kFU", "title": "ADH secretion", "kind": "Video", "description": "Learn the key triggers for ADH secretion. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adh-secretion"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/adh-effects-on-blood-pressure/", "id": "Ot1We4_EfRE", "title": "ADH effects on blood pressure", "kind": "Video", "description": "See how ADH acts on blood vessels and the kidney to raise blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adh-effects-on-blood-pressure"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood_pressure_control/aldosterone-and-adh/", "id": "Z0XPMFL45oo", "title": "Aldosterone and ADH", "kind": "Video", "description": "Find out how Aldosterone and ADH cause changes in volume and osmolarity. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-and-adh"}], "in_knowledge_map": false, "description": "The human body enjoys stability. For example, if your blood pressure changes, the body puts a couple of brilliant systems into motion in order to respond and bring your blood pressure back to normal. There are some quick responses using nerves and some slower responses using hormones. The system using hormones is sometimes called the renin-angiotensin-aldosterone-system (RAAS), which is the main system in the body for controlling blood pressure. When your blood pressure drops too low or gets too high, your kidneys, liver, and pituitary gland (part of your brain) talk to each other to solve the problem. They do this without you even noticing! Learn how the body knows when the blood pressure has changed, and how hormones like angiotensin 2, aldosterone, and ADH help return blood pressure to back to normal.", "node_slug": "blood_pressure_control", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/blood_pressure_control", "extended_slug": "science/health-and-medicine/circulatory-system/blood_pressure_control", "kind": "Topic", "slug": "blood_pressure_control"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/", "id": "fetal-circulation", "hide": false, "title": "Fetal circulation", "child_data": [{"kind": "Video", "id": "1192840523"}, {"kind": "Video", "id": "1192637761"}, {"kind": "Video", "id": "1081230475"}, {"kind": "Video", "id": "1192980081"}, {"kind": "Video", "id": "1228485319"}, {"kind": "Video", "id": "1228367762"}, {"kind": "Video", "id": "1228525134"}, {"kind": "Video", "id": "1228306858"}, {"kind": "Video", "id": "1228326727"}, {"kind": "Video", "id": "1228408237"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/meet-the-placenta/", "id": "bQioHx12JuY", "title": "Meet the placenta!", "kind": "Video", "description": "Learn how the needs of the fetus are met by the placenta, which is a special organ that belongs to both the mother and the fetus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-placenta"}, {"path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/umbilical-vessels-and-the-ductus-venosus/", "id": "XDF2QyQtd_Q", "title": "Umbilical vessels and the ductus venosus", "kind": "Video", "description": "Watch as fetal blood goes through umbilical vessels and takes a shortcut through the Ductus Venosus to make it back to the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "umbilical-vessels-and-the-ductus-venosus"}, {"path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/flow-through-the-heart/", "id": "7XaftdE_h60", "title": "Flow through the heart", "kind": "Video", "description": "Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "flow-through-the-heart"}, {"path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/hypoxic-pulmonary-vasoconstriction/", "id": "SJ1gu_WRx5o", "title": "Hypoxic pulmonary vasoconstriction", "kind": "Video", "description": "Watch how blood gets diverted away from alveoli with low oxygen levels. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "hypoxic-pulmonary-vasoconstriction"}, {"path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/foramen-ovale-and-ductus-arteriosus/", "id": "cgccQVcFLi4", "title": "Foramen ovale and ductus arteriosus", "kind": "Video", "description": "Watch how the fetal heart allows blood to simply bypass the lungs altogether using the Foramen Ovale and the Ductus Arteriosus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "foramen-ovale-and-ductus-arteriosus"}, {"path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/fetal-hemoglobin-and-hematocrit/", "id": "SqE5S1qS7ZU", "title": "Fetal hemoglobin and hematocrit", "kind": "Video", "description": "Although mom controls the oxygen source, the fetus has a couple of clever tricks to get the most oxygen possible! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "fetal-hemoglobin-and-hematocrit"}, {"path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/double-bohr-effect/", "id": "SL3I_RYjyZo", "title": "Double Bohr effect", "kind": "Video", "description": "Learn how there are two distinct Bohr effects happening at the same time in the placenta. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "double-bohr-effect"}, {"path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/fetal-circulation-right-before-birth/", "id": "-IRkisEtzsk", "title": "Fetal circulation right before birth", "kind": "Video", "description": "Watch how the blood flows through the fetal circulation and compare it to what happens in the baby's body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "fetal-circulation-right-before-birth"}, {"path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/baby-circulation-right-after-birth/", "id": "jFn0dyU5wUw", "title": "Baby circulation right after birth", "kind": "Video", "description": "Watch how the blood flows through the baby's circulation and compare it to what happens in the fetus. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "baby-circulation-right-after-birth"}, {"path": "khan/science/health-and-medicine/circulatory-system/fetal-circulation/fetal-structures-in-an-adult/", "id": "Oga0K4reWoY", "title": "Fetal structures in an adult", "kind": "Video", "description": "Find out what happens to those nifty fetal structures once we get older. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "fetal-structures-in-an-adult"}], "in_knowledge_map": false, "description": "At one stage or another in development, every friend you know had gill slits and a tail. Pretty crazy thought, huh? Fetal development is incredible, and it\u2019s important to understand exactly how it happens. The structure and function of the circulatory system is incredibly complex, and fetuses are no exception. Find out how the heart and circulatory system work in the fetus!", "node_slug": "fetal-circulation", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/fetal-circulation", "extended_slug": "science/health-and-medicine/circulatory-system/fetal-circulation", "kind": "Topic", "slug": "fetal-circulation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/blood-vessels/", "id": "blood-vessels", "hide": false, "title": "Blood vessels", "child_data": [{"kind": "Video", "id": "1036278079"}, {"kind": "Video", "id": "x6451892a"}, {"kind": "Video", "id": "x02c66e8b"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/blood-vessels/layers-of-a-blood-vessel/", "id": "VMwa6yC3r-s", "title": "Layers of a blood vessel", "kind": "Video", "description": "Remember the 3 key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are all different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "layers-of-a-blood-vessel"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood-vessels/three-types-of-capillaries/", "id": "hSkIG4MdKqU", "title": "Three types of capillaries", "kind": "Video", "description": "Learn the differences between continuous, fenestrated, and discontinuous capillaries, and how they affect the movement of molecules. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "three-types-of-capillaries"}, {"path": "khan/science/health-and-medicine/circulatory-system/blood-vessels/pre-capillary-sphincters/", "id": "yeX0uDpPBj4", "title": "Pre-capillary sphincters", "kind": "Video", "description": "Find out how the body controls how much blood flows through a capillary bed. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pre-capillary-sphincters"}], "in_knowledge_map": false, "description": "Where does your blood go after it leaves the heart? Your body has a fantastic pipeline system that moves your blood around to drop off oxygen and food to those hungry cells, and removes cell waste. Learn how arteries carry blood away from the heart, how veins bring blood back to the heart, and about the different layers of cells that make up these blood vessels.", "node_slug": "blood-vessels", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/blood-vessels", "extended_slug": "science/health-and-medicine/circulatory-system/blood-vessels", "kind": "Topic", "slug": "blood-vessels"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/arterial-stiffness/", "id": "arterial-stiffness", "hide": false, "title": "Arterial stiffness", "child_data": [{"kind": "Video", "id": "1036209223"}, {"kind": "Video", "id": "1036241270"}, {"kind": "Video", "id": "1036286076"}, {"kind": "Video", "id": "1036183638"}, {"kind": "Video", "id": "1036051470"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/arterial-stiffness/compliance-and-elastance/", "id": "cGhKJYfXW-c", "title": "Compliance and elastance", "kind": "Video", "description": "Learn about compliance (and elastance) of arteries, veins, and lead pipes! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "compliance-and-elastance"}, {"path": "khan/science/health-and-medicine/circulatory-system/arterial-stiffness/bernoulli-s-equation-of-total-energy/", "id": "gYpokkRFvO8", "title": "Bernoulli's equation of total energy", "kind": "Video", "description": "Learn how total energy of a fluid helps explain why fluids can move from low pressure to high pressure! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "bernoulli-s-equation-of-total-energy"}, {"path": "khan/science/health-and-medicine/circulatory-system/arterial-stiffness/stored-elastic-energy-in-large-and-middle-sized-arteries/", "id": "QcK7n-EqnQU", "title": "Stored elastic energy in large and middle sized arteries", "kind": "Video", "description": "See how arteries behave like sling shots, shooting blood (not rocks) onwards! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "stored-elastic-energy-in-large-and-middle-sized-arteries"}, {"path": "khan/science/health-and-medicine/circulatory-system/arterial-stiffness/compliance-decreased-blood-pressure/", "id": "RsYgjO5BiHU", "title": "Compliance - decreased blood pressure", "kind": "Video", "description": "Find out how compliance allows arteries to store elastic energy (and lower pressure). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "compliance-decreased-blood-pressure"}, {"path": "khan/science/health-and-medicine/circulatory-system/arterial-stiffness/compliance-increased-blood-flow/", "id": "LcyEXlCIkmA", "title": "Compliance - increased blood flow", "kind": "Video", "description": "Learn how compliant arteries allows for a \"Constant Pressure System\" like a modern water gun! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "compliance-increased-blood-flow"}], "in_knowledge_map": false, "description": "Believe it or not, the arteries are elastic and when they recoil they actually push blood along when the heart is relaxing (diastole). This is known as the windkessel effect and is the same basic principle used by some water guns. Unfortunately, with all the work that the circulatory system has to do, our arteries can become rigid with age. When the arteries get stiff like lead pipes, the problem is quite different then when the arteries actually get clogged up, but just as important.", "node_slug": "arterial-stiffness", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/arterial-stiffness", "extended_slug": "science/health-and-medicine/circulatory-system/arterial-stiffness", "kind": "Topic", "slug": "arterial-stiffness"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/heart-muscle-contraction/", "id": "heart-muscle-contraction", "hide": false, "title": "Heart muscle contraction", "child_data": [{"kind": "Video", "id": "1097595603"}, {"kind": "Video", "id": "1097394824"}, {"kind": "Video", "id": "24004"}, {"kind": "Video", "id": "24006"}, {"kind": "Video", "id": "1101443158"}, {"kind": "Video", "id": "1101414195"}, {"kind": "Video", "id": "1117437512"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/heart-muscle-contraction/three-types-of-muscle/", "id": "bwOE1MEginA", "title": "Three types of muscle", "kind": "Video", "description": "Understanding the structure of a muscle cell.", "slug": "three-types-of-muscle"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-muscle-contraction/heart-cells-up-close/", "id": "__afuK1CMpQ", "title": "Heart cells up close!", "kind": "Video", "description": "Get a close-up view of the cardiac cells and see what makes them different from the other (skeletal and smooth) muscle cells. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "heart-cells-up-close"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-muscle-contraction/myosin-and-actin/", "id": "zopoN2i7ALQ", "title": "Myosin and actin", "kind": "Video", "description": "How myosin and actin interact to produce mechanical force.", "slug": "myosin-and-actin"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-muscle-contraction/tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction/", "id": "LiOfeSsjrB8", "title": "Tropomyosin and troponin and their role in regulating muscle contraction", "kind": "Video", "description": "Tropomyosin and troponin and their role in regulating muscle contraction. How calcium ion concentration dictates whether a muscle is contracting or not.", "slug": "tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-muscle-contraction/calcium-puts-myosin-to-work/", "id": "vv6WBeqw2Nc", "title": "Calcium puts myosin to work", "kind": "Video", "description": "See exactly how Calcium binds Troponin-C and allows Myosin to do some work.", "slug": "calcium-puts-myosin-to-work"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-muscle-contraction/sympathetic-nerves-affect-myosin-activity/", "id": "xAL0tbYU8QU", "title": "Sympathetic nerves affect myosin activity", "kind": "Video", "description": "Check out how the amount of Myosin that is tugging on your heart can change depending on your activity level! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "sympathetic-nerves-affect-myosin-activity"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-muscle-contraction/why-doesn-t-the-heart-rip/", "id": "cuwMrVoG2V8", "title": "Why doesn't the heart rip?", "kind": "Video", "description": "Understand LaPlace's law to see the effect that pressure, radius, and wall thickness each have on the \"wall stress\" in the left ventricle. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "why-doesn-t-the-heart-rip"}], "in_knowledge_map": false, "description": "Your heart is made of a special type of muscle, found nowhere else in the body! This unique muscle is specialized to perform the repetitive task of pumping your blood throughout your body, from the day you\u2019re born to the day you die. We\u2019ll take an in-depth look of how the heart accomplishes this on a cellular level, and learn about the proteins actin and myosin that are the workhorses that tug and pull on one another to create every single muscle contraction. You\u2019ll appreciate the fact that your heart beat is a fairly sophisticated process!", "node_slug": "heart-muscle-contraction", "render_type": "UncuratedTutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/heart-muscle-contraction", "extended_slug": "science/health-and-medicine/circulatory-system/heart-muscle-contraction", "kind": "Topic", "slug": "heart-muscle-contraction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/", "id": "heart-depolarization", "hide": false, "title": "Heart depolarization", "child_data": [{"kind": "Video", "id": "1077809718"}, {"kind": "Video", "id": "1077988383"}, {"kind": "Video", "id": "1078024276"}, {"kind": "Video", "id": "1077916714"}, {"kind": "Video", "id": "1078059064"}, {"kind": "Video", "id": "1089536367"}, {"kind": "Video", "id": "1078012364"}, {"kind": "Video", "id": "1077956571"}, {"kind": "Video", "id": "1084652257"}, {"kind": "Video", "id": "1089349882"}, {"kind": "Video", "id": "1084416478"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/membrane-potentials-part-1/", "id": "PtKAeihnbv0", "title": "Membrane potentials - part 1", "kind": "Video", "description": "Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "membrane-potentials-part-1"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/membrane-potentials-part-2/", "id": "eROhIFBGKuU", "title": "Membrane potentials - part 2", "kind": "Video", "description": "Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "membrane-potentials-part-2"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/permeability-and-membrane-potentials/", "id": "920PtNX-WCE", "title": "Permeability and membrane potentials", "kind": "Video", "description": "Find out why a cell that is permeable to multiple ions has a membrane potential that is influenced by the ion with the highest permeability. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "permeability-and-membrane-potentials"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/action-potentials-in-pacemaker-cells/", "id": "OQpFFiLdE0E", "title": "Action potentials in pacemaker cells", "kind": "Video", "description": "Find out how the pacemaker cells use the movement of sodium, calcium, and potassium to get your heart beating! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "action-potentials-in-pacemaker-cells"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/action-potentials-in-cardiac-myocytes/", "id": "rIVCuC-Etc0", "title": "Action potentials in cardiac myocytes", "kind": "Video", "description": "See how muscle cells in the heart contract by allowing Calcium to flow inside and bringing along some positive charge with it! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "action-potentials-in-cardiac-myocytes"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/reseting-cardiac-concentration-gradients/", "id": "j2iY1cT2gEE", "title": "Resetting cardiac concentration gradients", "kind": "Video", "description": "Watch as the heart cells use energy to reset the concentration gradients for all of the ions after the action potential has gone through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "reseting-cardiac-concentration-gradients"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/electrical-system-of-the-heart/", "id": "7K2icszdxQc", "title": "Electrical system of the heart", "kind": "Video", "description": "See where the pacemaker cells start the electrical wave of depolarization, and how it gets all the way to the ventricles of the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "electrical-system-of-the-heart"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/depolarization-waves-flowing-through-the-heart/", "id": "s5smas8uum4", "title": "Depolarization waves flowing through the heart", "kind": "Video", "description": "Get a clearer idea of what a \"Depolarization Wave\" means and how it goes from cell to cell through the entire heart! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "depolarization-waves-flowing-through-the-heart"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/a-race-to-keep-pace/", "id": "_yR9DBHMFXE", "title": "A race to keep pace!", "kind": "Video", "description": "Find out how the various pacemaker cells in the heart actually race against the clock to try to keep pace for the heart, and how the heart has not one but two back up systems! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "a-race-to-keep-pace"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/thinking-about-heartbeats/", "id": "7TafYJLjhY4", "title": "Thinking about heartbeats", "kind": "Video", "description": "Find out what happens when things move very slowly through the AV Node! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "thinking-about-heartbeats"}, {"path": "khan/science/health-and-medicine/circulatory-system/heart-depolarization/new-perspective-on-the-heart/", "id": "8zrJxuVW3u4", "title": "New perspective on the heart", "kind": "Video", "description": "Take a look at the heart in cross section, looking down at it from the top! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "new-perspective-on-the-heart"}], "in_knowledge_map": false, "description": "Your heart relies on the flow of electricity to maintain a steady, consistent beat - like an automatic pump that maintains a regular rate and rhythm throughout your life! There are specialized heart cells that allow positive current to travel quickly throughout the heart muscle. In these videos, we\u2019ll check out the flow of this positive charge on a macroscopic and microscopic level.", "node_slug": "heart-depolarization", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/heart-depolarization", "extended_slug": "science/health-and-medicine/circulatory-system/heart-depolarization", "kind": "Topic", "slug": "heart-depolarization"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/nerve-regulation-of-the-heart/", "id": "nerve-regulation-of-the-heart", "hide": false, "title": "Nerve regulation of the heart", "child_data": [{"kind": "Video", "id": "1087764117"}, {"kind": "Video", "id": "1087636641"}, {"kind": "Video", "id": "1089555286"}, {"kind": "Video", "id": "1097662116"}, {"kind": "Video", "id": "1097434701"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/nerve-regulation-of-the-heart/changing-the-av-node-delay-chronotropic-effect/", "id": "cmQtbpYihAI", "title": "Changing the AV node delay - chronotropic effect", "kind": "Video", "description": "Find out exactly how your autonomic nervous system has a chronotropic effect (i.e. timing) that changes the delay between the contraction of the atria and the ventricles! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "changing-the-av-node-delay-chronotropic-effect"}, {"path": "khan/science/health-and-medicine/circulatory-system/nerve-regulation-of-the-heart/changing-the-heart-rate-chronotropic-effect/", "id": "3HvIKsQb6es", "title": "Changing the heart rate - chronotropic effect", "kind": "Video", "description": "Find out exactly how your autonomic nervous system has a chronotropic effect (i.e. timing) that changes speed of your heartbeat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "changing-the-heart-rate-chronotropic-effect"}, {"path": "khan/science/health-and-medicine/circulatory-system/nerve-regulation-of-the-heart/increasing-ventricular-contractility-inotropic-effect/", "id": "0eu-3FIRRz8", "title": "Increasing ventricular contractility - inotropic effect", "kind": "Video", "description": "Find out how the sympathetic nerves increase the heart's force of contraction and speed of relaxation! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "increasing-ventricular-contractility-inotropic-effect"}, {"path": "khan/science/health-and-medicine/circulatory-system/nerve-regulation-of-the-heart/autonomic-nervous-system-effects-on-the-heart/", "id": "KiouveG278Y", "title": "Autonomic nervous system effects on the heart", "kind": "Video", "description": "Carefully go through each of the four major effects that the sympathetic and parasympathetic system has on your heart: Chronotropy, Dromotropy, Inotropy, and Lusitropy. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "autonomic-nervous-system-effects-on-the-heart"}, {"path": "khan/science/health-and-medicine/circulatory-system/nerve-regulation-of-the-heart/getting-a-new-heart/", "id": "dqmaxkxInZ4", "title": "Getting a new heart", "kind": "Video", "description": "Think through the result of getting a new heart, and how the heart can still maintain homeostasis when the nerves are no longer around. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "getting-a-new-heart"}], "in_knowledge_map": false, "description": "Although your heart can beat independently, your nervous system is important as an external regulator. Your brain can tell your heart to speed up or slow down, depending on the scenario. For example, when you\u2019re falling asleep, your nervous system will cause your heart to slow down, and 8 hours later when your phone alarm goes off, your nervous system will speed up your heartbeat! So even though your heart muscle beats by itself, the nerves can ramp up or down the speed. Check out the videos to learn more about how the nerves help to regulate the heart.", "node_slug": "nerve-regulation-of-the-heart", "render_type": "UncuratedTutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/nerve-regulation-of-the-heart", "extended_slug": "science/health-and-medicine/circulatory-system/nerve-regulation-of-the-heart", "kind": "Topic", "slug": "nerve-regulation-of-the-heart"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/preload-and-afterload/", "id": "preload-and-afterload", "hide": false, "title": "Preload and afterload", "child_data": [{"kind": "Video", "id": "1117437512"}, {"kind": "Video", "id": "1133168259"}, {"kind": "Video", "id": "1150515528"}, {"kind": "Video", "id": "1150565196"}, {"kind": "Video", "id": "1150572205"}, {"kind": "Video", "id": "1150353015"}, {"kind": "Video", "id": "1150546387"}, {"kind": "Video", "id": "1150537387"}, {"kind": "Video", "id": "1159114411"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/preload-and-afterload/why-doesn-t-the-heart-rip/", "id": "cuwMrVoG2V8", "title": "Why doesn't the heart rip?", "kind": "Video", "description": "Understand LaPlace's law to see the effect that pressure, radius, and wall thickness each have on the \"wall stress\" in the left ventricle. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "why-doesn-t-the-heart-rip"}, {"path": "khan/science/health-and-medicine/circulatory-system/preload-and-afterload/what-is-preload/", "id": "DLD23lPv8eo", "title": "What is preload?", "kind": "Video", "description": "Some say Preload = End-Diastolic Pressure, others say Preload = End-Diastolic Volume, so which one is it? Watch and find out! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-preload"}, {"path": "khan/science/health-and-medicine/circulatory-system/preload-and-afterload/preload-and-pressure/", "id": "S-4pFl3mjr8", "title": "Preload and pressure", "kind": "Video", "description": "Find out how left ventricular end-diastolic pressure helps you make an educated guess about preload. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "preload-and-pressure"}, {"path": "khan/science/health-and-medicine/circulatory-system/preload-and-afterload/preload-stretches-out-the-heart-cells/", "id": "SCo1m7OEqac", "title": "Preload stretches out the heart cells", "kind": "Video", "description": "Find out why stretching a heart cell in diastole affects how forcefully it contracts in systole. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "preload-stretches-out-the-heart-cells"}, {"path": "khan/science/health-and-medicine/circulatory-system/preload-and-afterload/frank-starling-mechanism/", "id": "5SO58NndlPI", "title": "Frank-Starling mechanism", "kind": "Video", "description": "Carefully follow 5 different preload scenarios to see how each one will have a different effect on how actin and myosin line up. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "frank-starling-mechanism"}, {"path": "khan/science/health-and-medicine/circulatory-system/preload-and-afterload/sarcomere-length-tension-relationship/", "id": "uVFqEi5j1v0", "title": "Sarcomere length-tension relationship", "kind": "Video", "description": "Find out why the length of a sarcomere (in diastole) affects the amount of force that it can generate (in systole), and how that would look on a graph. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "sarcomere-length-tension-relationship"}, {"path": "khan/science/health-and-medicine/circulatory-system/preload-and-afterload/active-contraction-vs-passive-recoil/", "id": "Ijret8P3kWM", "title": "Active contraction vs. passive recoil", "kind": "Video", "description": "Go through the similarities and differences between the sarcomere and a slingshot! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "active-contraction-vs-passive-recoil"}, {"path": "khan/science/health-and-medicine/circulatory-system/preload-and-afterload/what-is-afterload/", "id": "yOf3kDD3WIA", "title": "What is afterload?", "kind": "Video", "description": "Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-afterload"}, {"path": "khan/science/health-and-medicine/circulatory-system/preload-and-afterload/increasing-the-heart-s-force-of-contraction/", "id": "FttqXKdw_Xk", "title": "Increasing the heart's force of contraction", "kind": "Video", "description": "Find out exactly how stretch increases force of contraction in end-diastole, whereas more calcium increased force of contraction in end-systole. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "increasing-the-heart-s-force-of-contraction"}], "in_knowledge_map": false, "description": "After using your jeans for a while, you\u2019ll begin to notice small tears and rips developing in the fabric. Why doesn\u2019t this happen to your heart as well? Well, your heart manages to stay healthy despite all of the \u201cwall stress\u201d that pulls on the heart walls. During different parts of the heart cycle (afterload vs. preload) the mechanics of \u201cwall stress\u201d change dramatically. Learn exactly what preload and afterload mean, and how we can use pressure-volume loops to estimate their values.", "node_slug": "preload-and-afterload", "render_type": "UncuratedTutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/preload-and-afterload", "extended_slug": "science/health-and-medicine/circulatory-system/preload-and-afterload", "kind": "Topic", "slug": "preload-and-afterload"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/", "id": "pressure-volume-loops", "hide": false, "title": "Pressure volume loops", "child_data": [{"kind": "Video", "id": "1117408699"}, {"kind": "Video", "id": "1117388594"}, {"kind": "Video", "id": "1117447604"}, {"kind": "Video", "id": "1133156250"}, {"kind": "Video", "id": "1133212041"}, {"kind": "Video", "id": "1133106461"}, {"kind": "Video", "id": "1133142260"}, {"kind": "Video", "id": "1133137366"}, {"kind": "Video", "id": "1132944890"}, {"kind": "Video", "id": "1159115460"}, {"kind": "Video", "id": "1133168259"}, {"kind": "Video", "id": "1117437512"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/pressure-in-the-left-heart-part-1/", "id": "XTF0-54yJMk", "title": "Pressure in the left heart - part 1", "kind": "Video", "description": "Watch the pressure in the left heart go up and down with every heart beat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "pressure-in-the-left-heart-part-1"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/pressure-in-the-left-heart-part-2/", "id": "QM4f1vos6Vk", "title": "Pressure in the left heart - part 2", "kind": "Video", "description": "Watch the pressure in the left heart go up and down with every heart beat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "pressure-in-the-left-heart-part-2"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/pressure-in-the-left-heart-part-3/", "id": "E5PndKebh70", "title": "Pressure in the left heart - part 3", "kind": "Video", "description": "Watch the pressure in the left heart go up and down with every heart beat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "pressure-in-the-left-heart-part-3"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/left-ventricular-pressure-vs-time/", "id": "SrL6TQbWKJE", "title": "Left ventricular pressure vs. time", "kind": "Video", "description": "Ever wonder exactly how the left ventricle's pressure changes over time? Find out in this color-coded video! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "left-ventricular-pressure-vs-time"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/left-ventricular-volume-vs-time/", "id": "cJLbnWBU09E", "title": "Left ventricular volume vs. time", "kind": "Video", "description": "Left ventricular volume changes over time in a way that makes a curious looking graph. Learn more in this video! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "left-ventricular-volume-vs-time"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/drawing-a-pressure-volume-loop/", "id": "R7_irilQ_-A", "title": "Drawing a pressure-volume loop", "kind": "Video", "description": "Use the left ventricular pressure and volume information to put together a cool new graph. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "drawing-a-pressure-volume-loop"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/understanding-the-pressure-volume-loop/", "id": "AnwPH5yU8rY", "title": "Understanding the pressure-volume loop", "kind": "Video", "description": "Figure out how all of those physiology terms: end-systolic, end-diastolic, pulse pressure, stroke volume, and ejection fraction, can be easily figured out using the pressure-volume loop. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "understanding-the-pressure-volume-loop"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/end-diastolic-pressure-volume-relationship-edpvr/", "id": "h72iwhmB6zc", "title": "End diastolic pressure-volume relationship (EDPVR)", "kind": "Video", "description": "Find out what happens when the left ventricle is not allowed to contract, and instead you simply add and take away blood from it. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "end-diastolic-pressure-volume-relationship-edpvr"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/end-systolic-pressure-volume-relationship-espvr/", "id": "byj5VLuLS6c", "title": "End systolic pressure-volume relationship (ESPVR)", "kind": "Video", "description": "Find out what happens when the left ventricle is not allowed to relax, and instead you simply add and take away blood from it. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "end-systolic-pressure-volume-relationship-espvr"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/reimagine-the-pressure-volume-relationship/", "id": "BdlkhDHbN98", "title": "Reimagine the pressure volume relationship", "kind": "Video", "description": "Understand what is happening at the cellular level to cause two identical left ventricular volumes to have such different pressures! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "reimagine-the-pressure-volume-relationship"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/what-is-preload/", "id": "DLD23lPv8eo", "title": "What is preload?", "kind": "Video", "description": "Some say Preload = End-Diastolic Pressure, others say Preload = End-Diastolic Volume, so which one is it? Watch and find out! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-preload"}, {"path": "khan/science/health-and-medicine/circulatory-system/pressure-volume-loops/why-doesn-t-the-heart-rip/", "id": "cuwMrVoG2V8", "title": "Why doesn't the heart rip?", "kind": "Video", "description": "Understand LaPlace's law to see the effect that pressure, radius, and wall thickness each have on the \"wall stress\" in the left ventricle. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "why-doesn-t-the-heart-rip"}], "in_knowledge_map": false, "description": "The pressure volume loop is one of the classic figures that helps us to conceptualize and understand the mechanics of the left ventricle of the heart. In addition to a filling up with blood and squeezing out blood there is a (very short) period of time when the heart muscle is contracting and relaxing with no volume change! As the left ventricle moves around the PV loop with each lub dub you get a sense for the amazing amount of work it does as pressures and volumes go up and down, all day, every day. This is a fascinating area where physics and biology meet to produce something miraculous.", "node_slug": "pressure-volume-loops", "render_type": "UncuratedTutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/pressure-volume-loops", "extended_slug": "science/health-and-medicine/circulatory-system/pressure-volume-loops", "kind": "Topic", "slug": "pressure-volume-loops"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/", "id": "changing-the-PV-loop", "hide": false, "title": "Changing the PV loop", "child_data": [{"kind": "Video", "id": "1133168259"}, {"kind": "Video", "id": "1150537387"}, {"kind": "Video", "id": "1159114411"}, {"kind": "Video", "id": "1159115460"}, {"kind": "Video", "id": "1179431919"}, {"kind": "Video", "id": "1179656720"}, {"kind": "Video", "id": "1179661500"}, {"kind": "Video", "id": "1179525912"}, {"kind": "Video", "id": "1179692608"}, {"kind": "Video", "id": "1179760355"}, {"kind": "Scratchpad", "id": "1224182071"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/what-is-preload/", "id": "DLD23lPv8eo", "title": "What is preload?", "kind": "Video", "description": "Some say Preload = End-Diastolic Pressure, others say Preload = End-Diastolic Volume, so which one is it? Watch and find out! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-preload"}, {"path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/what-is-afterload/", "id": "yOf3kDD3WIA", "title": "What is afterload?", "kind": "Video", "description": "Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-afterload"}, {"path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/increasing-the-heart-s-force-of-contraction/", "id": "FttqXKdw_Xk", "title": "Increasing the heart's force of contraction", "kind": "Video", "description": "Find out exactly how stretch increases force of contraction in end-diastole, whereas more calcium increased force of contraction in end-systole. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "increasing-the-heart-s-force-of-contraction"}, {"path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/reimagine-the-pressure-volume-relationship/", "id": "BdlkhDHbN98", "title": "Reimagine the pressure volume relationship", "kind": "Video", "description": "Understand what is happening at the cellular level to cause two identical left ventricular volumes to have such different pressures! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "reimagine-the-pressure-volume-relationship"}, {"path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/what-is-contractility/", "id": "gmHH0wIXsog", "title": "What is contractility?", "kind": "Video", "description": "Contractility tells us how many myosin heads are working at the end of systole; a number that goes up or down with the level of sympathetic nerve stimulation. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-contractility"}, {"path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/getting-ea-arterial-elastance-from-the-pv-loop/", "id": "NG7nbAcAFNc", "title": "Getting Ea (arterial elastance) from the PV loop", "kind": "Video", "description": "Find out how to use the PV loop to draw the Ea (Arterial Elastance) line, and what it represents. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "getting-ea-arterial-elastance-from-the-pv-loop"}, {"path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/arterial-elastance-ea-and-afterload/", "id": "BGIkU1yzBNM", "title": "Arterial elastance (Ea) and afterload", "kind": "Video", "description": "First, learn the difference between arterial elastance (Ea) and afterload. Then, understand how Ea is affected by changes in afterload, and in turn, how the PV loop can shift. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arterial-elastance-ea-and-afterload"}, {"path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/arterial-elastance-ea-and-preload/", "id": "At8jOJ_rpzA", "title": "Arterial elastance (Ea) and preload", "kind": "Video", "description": "Understand how Ea is affected by changes in preload, and in turn, how the PV loop can shift. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arterial-elastance-ea-and-preload"}, {"path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/stroke-work-in-pv-loops-and-boxes/", "id": "aFV9dk5PsPA", "title": "Stroke work in PV loops and boxes", "kind": "Video", "description": "Watch how PV loops can be \"morphed\" into PV boxes to make drawing them and thinking about them much simpler. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "stroke-work-in-pv-loops-and-boxes"}, {"path": "khan/science/health-and-medicine/circulatory-system/changing-the-pv-loop/contractility-ea-and-preload-effects-on-pv-boxes/", "id": "JRrm8TfBj1c", "title": "Contractility, Ea, and preload effects on PV boxes", "kind": "Video", "description": "See how contractility, Ea (arterial elastance), and preload each have an effect on PV Boxes. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "contractility-ea-and-preload-effects-on-pv-boxes"}], "in_knowledge_map": false, "description": "Once you\u2019ve learned about the PV loop, a natural question arises - Does it ever change shape? It turns out that there are precisely three things that can change the shape of the loop: 1. Preload, 2. Afterload, and 3. Contractility. That\u2019s it! The tricky part comes when you try to change one and you realize that the body begins to change the other two as well as a natural consequence. In order to simplify, you\u2019ll find that PV loops are sometimes even described as PV boxes. You\u2019ll get to learn about PV loops, PV boxes, and even play around with them yourself in this tutorial!", "node_slug": "changing-the-PV-loop", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system/changing-the-PV-loop", "extended_slug": "science/health-and-medicine/circulatory-system/changing-the-PV-loop", "kind": "Topic", "slug": "changing-the-pv-loop"}], "in_knowledge_map": false, "description": "Your heart sits in the middle of your chest and pumps blood from about 4 weeks after conception until the day that you die. It never stops, and over your lifetime it will pump ~175 million liters of blood. To visualize that, imagine the amount of water that falls over Niagara falls in a few minutes. Remarkable! This little pump is the size of your clenched fist and in an adult can weigh about 300 grams. Watch these videos to learn more about how the heart works, blood flow in arteries and veins, blood pressure, and lymphatics.", "node_slug": "circulatory-system", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/circulatory-system", "extended_slug": "science/health-and-medicine/circulatory-system", "kind": "Topic", "slug": "circulatory-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/", "id": "circulatory-system-diseases", "hide": false, "title": "Circulatory system diseases", "child_data": [{"kind": "Topic", "id": "x1f8e3716"}, {"kind": "Topic", "id": "xf562c87e"}, {"kind": "Topic", "id": "xab5cac69"}, {"kind": "Topic", "id": "xef0055aa"}, {"kind": "Topic", "id": "x5ec08c0e"}, {"kind": "Topic", "id": "xe7af2dfc"}, {"kind": "Topic", "id": "xe6414fe5"}, {"kind": "Topic", "id": "xbf52341e"}, {"kind": "Topic", "id": "xbd85ea99"}, {"kind": "Topic", "id": "xe580562e"}, {"kind": "Topic", "id": "xf9ddcc28"}, {"kind": "Topic", "id": "x0aa45e36"}, {"kind": "Topic", "id": "x8e58a2cd"}, {"kind": "Topic", "id": "xdbd5ed02"}, {"kind": "Topic", "id": "x94b23857"}, {"kind": "Topic", "id": "xc93c707d"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease/", "id": "coronary-artery-disease", "hide": false, "title": "Coronary artery disease", "child_data": [{"kind": "Video", "id": "x221265d4"}, {"kind": "Video", "id": "x8e8e24e8"}, {"kind": "Video", "id": "xc3abc709"}, {"kind": "Video", "id": "x56611428"}, {"kind": "Video", "id": "xc6edda86"}, {"kind": "Video", "id": "x5b27bfe4"}, {"kind": "Video", "id": "xe17fbbdf"}, {"kind": "Video", "id": "x3e29b0ff"}, {"kind": "Video", "id": "x4e523752"}, {"kind": "Exercise", "id": "x987fc691"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease/what-is-coronary-artery-disease/", "id": "EATkbpqlxvc", "title": "What is coronary artery disease?", "kind": "Video", "slug": "what-is-coronary-artery-disease"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease/risk-factors-for-coronary-artery-disease/", "id": "RrXJsf9x_sY", "title": "Risk factors for coronary artery disease", "kind": "Video", "slug": "risk-factors-for-coronary-artery-disease"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease/atherosclerosis/", "id": "g3kDdg8r6NY", "title": "Atherosclerosis", "kind": "Video", "slug": "atherosclerosis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease/heart-attack-myocardial-infarction-pathophysiology/", "id": "T_b9U5gn_Zk", "title": "Heart attack (myocardial infarction) pathophysiology", "kind": "Video", "slug": "heart-attack-myocardial-infarction-pathophysiology"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease/heart-attack-myocardial-infarct-diagnosis/", "id": "kO8-RPIkuLE", "title": "Heart attack (myocardial infarct) diagnosis", "kind": "Video", "slug": "heart-attack-myocardial-infarct-diagnosis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease/heart-attack-myocardial-infarct-medications/", "id": "Pfg9FY1Fguc", "title": "Heart attack (myocardial infarct) medications", "kind": "Video", "slug": "heart-attack-myocardial-infarct-medications"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease/heart-attack-myocardial-infarction-interventions-and-treatment/", "id": "dLtFP6t99yo", "title": "Heart attack (myocardial infarction) interventions and treatment", "kind": "Video", "slug": "heart-attack-myocardial-infarction-interventions-and-treatment"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease/healing-after-a-heart-attack-myocardial-infarction/", "id": "9lIxelNVmNU", "title": "Healing after a heart attack (myocardial infarction)", "kind": "Video", "slug": "healing-after-a-heart-attack-myocardial-infarction"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease/complications-after-a-heart-attack-myocardial-infarction/", "id": "m1DOnLhVuX4", "title": "Complications after a heart attack (myocardial infarction)", "kind": "Video", "slug": "complications-after-a-heart-attack-myocardial-infarction"}], "in_knowledge_map": false, "description": "Coronary artery disease - clogging of the arteries supplying the heart- is the cause of about 30% of all deaths globally, making it the leading cause of death. Stroke is a similarly debilitating condition that results from lack of perfusion to the brain. Unfortunately, patients with heart disease are more likely to suffer from heart disease and vice versa. You will come to an understanding of the pathophysiology behind these common diseases and how they relate to one another.", "node_slug": "coronary-artery-disease", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/coronary-artery-disease", "kind": "Topic", "slug": "coronary-artery-disease"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases/", "id": "blood-vessel-diseases", "hide": false, "title": "Atherosclerosis, arteriosclerosis, and arteriolosclerosis", "child_data": [{"kind": "Video", "id": "1036157588"}, {"kind": "Video", "id": "1035851899"}, {"kind": "Video", "id": "1036107435"}, {"kind": "Video", "id": "1036111765"}, {"kind": "Video", "id": "1036118431"}, {"kind": "Video", "id": "1036220302"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases/arteries-vs-veins-what-s-the-difference/", "id": "7b6LRebCgb4", "title": "Arteries vs. veins - what's the difference?", "kind": "Video", "description": "Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arteries-vs-veins-what-s-the-difference"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases/arteriosclerosis-arteriolosclerosis-and-atherosclerosis/", "id": "_T60pBGcoQU", "title": "Arteriosclerosis, arteriolosclerosis, and atherosclerosis", "kind": "Video", "description": "Learn the difference between Arteriosclerosis, Arteriolosclerosis, and Atherosclerosis! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arteriosclerosis-arteriolosclerosis-and-atherosclerosis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases/atherosclerosis-part-1/", "id": "1qifvZnpKjU", "title": "Atherosclerosis - part 1", "kind": "Video", "description": "See how Atherosclerosis (Fat in the blood vessel wall) hardens the arterial wall and makes it harder for blood to flow through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "atherosclerosis-part-1"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases/atherosclerosis-part-2/", "id": "N-mAEwzCwMM", "title": "Atherosclerosis - part 2", "kind": "Video", "description": "See how Atherosclerosis (Fat in the blood vessel wall) hardens the arterial wall and makes it harder for blood to flow through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "atherosclerosis-part-2"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases/arteriolosclerosis-part-1/", "id": "1JudNLK1-Ck", "title": "Arteriolosclerosis - part 1", "kind": "Video", "description": "See how hyaline arteriolosclerosis (Protein in the arterial wall) causes hardening of the blood vessels. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arteriolosclerosis-part-1"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases/arteriolosclerosis-part-2/", "id": "EOnlvbWjFOE", "title": "Arteriolosclerosis - part 2", "kind": "Video", "description": "See how hyperplastic arteriolosclerosis (Protein in the arterial wall) makes it difficult for blood to go through blood vessels. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arteriolosclerosis-part-2"}], "in_knowledge_map": false, "description": "The ancient Greeks thought blood vessels actually carried air throughout the body. Although we know better today, many people are still often confused with the specifics! We now know that the vessels carry blood instead, and we are able to distinguish between two different types: arteries and veins. Learn about how arteries differ from veins and how vessels can get damaged over time.", "node_slug": "blood-vessel-diseases", "render_type": "UncuratedTutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/blood-vessel-diseases", "kind": "Topic", "slug": "blood-vessel-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/", "id": "stroke", "hide": false, "title": "Stroke", "child_data": [{"kind": "Article", "id": "x10c3de57"}, {"kind": "Video", "id": "xac42ab4d"}, {"kind": "Video", "id": "xf3f001d8"}, {"kind": "Video", "id": "x66f0de58"}, {"kind": "Video", "id": "x19793179"}, {"kind": "Video", "id": "xf171afc3"}, {"kind": "Video", "id": "x890fc9db"}, {"kind": "Video", "id": "x705027ed"}, {"kind": "Video", "id": "x9baa9fdd"}, {"kind": "Video", "id": "x4b8a13bb"}, {"kind": "Video", "id": "xd1b2182f"}, {"kind": "Video", "id": "x1f8d3007"}, {"kind": "Video", "id": "x99ebf60a"}, {"kind": "Video", "id": "x867d1836"}, {"kind": "Video", "id": "xcb64b77e"}, {"kind": "Video", "id": "xef708355"}, {"kind": "Video", "id": "x2a2f4afd"}, {"kind": "Video", "id": "x368e7861"}, {"kind": "Video", "id": "xe6b2f95a"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/cerebral-blood-supply-part-1/", "id": "hfG8J_X1D5Q", "title": "Cerebral blood supply: Part 1", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "cerebral-blood-supply-part-1"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/cerebral-blood-supply-part-2/", "id": "kVulo3qDcUo", "title": "Cerebral blood supply: Part 2", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "cerebral-blood-supply-part-2"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/what-is-a-stroke/", "id": "QIAI6KOwKII", "title": "What is a stroke?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-a-stroke"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/risk-factors-for-stroke/", "id": "QskZ-o0egF8", "title": "Risk factors for stroke", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "risk-factors-for-stroke"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/ischemic-stroke/", "id": "qCvV11R2lgg", "title": "Ischemic stroke", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "ischemic-stroke"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/hemorrhagic-strokes/", "id": "TJeUOPc9pgs", "title": "Hemorrhagic strokes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hemorrhagic-strokes"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/ischemic-core-and-penumbra/", "id": "lmiXf-jilGE", "title": "Ischemic core and penumbra", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "ischemic-core-and-penumbra"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/the-ischemic-cascade-in-stroke/", "id": "57pvSMQ0E5M", "title": "The ischemic cascade in stroke", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-ischemic-cascade-in-stroke"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/blood-brain-barrier-and-vasogenic-edema/", "id": "QjJT87nY1WI", "title": "Blood brain barrier and vasogenic edema", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "blood-brain-barrier-and-vasogenic-edema"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/post-stroke-inflammation/", "id": "GdfP-loRfm0", "title": "Post stroke inflammation", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "post-stroke-inflammation"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/how-do-you-know-if-someone-is-having-a-stroke-think-fast/", "id": "bL7yQRbYJCo", "title": "How do you know if someone is having a stroke: Think FAST!", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "how-do-you-know-if-someone-is-having-a-stroke-think-fast"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/common-stroke-signs-and-symptoms/", "id": "kVGb778WcMU", "title": "Common stroke signs and symptoms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "common-stroke-signs-and-symptoms"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/diagnosing-strokes-by-history-and-physical-exam/", "id": "yTMZsxSBv_0", "title": "Diagnosing strokes by history and physical exam", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-strokes-by-history-and-physical-exam"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/diagnosing-strokes-with-imaging-ct-mri-and-angiography/", "id": "xC55TgPmfZ0", "title": "Diagnosing strokes with imaging CT, MRI, and Angiography", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-strokes-with-imaging-ct-mri-and-angiography"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/diagnosing-strokes-with-lab-tests/", "id": "AgPpM4jqkxU", "title": "Diagnosing strokes with lab tests", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-strokes-with-lab-tests"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/acute-treatment-of-stroke-with-medications/", "id": "LvoONWiXJ5I", "title": "Acute treatment of stroke with medications", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "acute-treatment-of-stroke-with-medications"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/treatment-of-stroke-with-interventions/", "id": "BYE5lxTzNVM", "title": "Treatment of stroke with interventions", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatment-of-stroke-with-interventions"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/stroke/preventing-further-strokes/", "id": "FVedgkn0o70", "title": "Preventing further strokes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preventing-further-strokes"}], "in_knowledge_map": false, "description": "", "node_slug": "stroke", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/stroke", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/stroke", "kind": "Topic", "slug": "stroke"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/", "id": "hypertension", "hide": false, "title": "Hypertension", "child_data": [{"kind": "Article", "id": "x52c25afc"}, {"kind": "Video", "id": "1036138448"}, {"kind": "Video", "id": "1036249138"}, {"kind": "Video", "id": "1036124747"}, {"kind": "Video", "id": "1036215201"}, {"kind": "Video", "id": "1036191424"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/what-is-hypertension/", "id": "FBoYigdnLKQ", "title": "What is hypertension?", "kind": "Video", "description": "Learn the categories of hypertension for systolic and diastolic blood pressures. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-hypertension"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/hypertension-symptoms-and-categories/", "id": "8aeivxR1GDc", "title": "Hypertension symptoms and categories", "kind": "Video", "description": "Learn the most common symptoms (or lack thereof!) and the two major categories of hypertension. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "hypertension-symptoms-and-categories"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/hypertension-effects-on-the-blood-vessels/", "id": "PYkaoQc-fLU", "title": "Hypertension effects on the blood vessels", "kind": "Video", "description": "Learn about how hypertension can cause damage to the large/middle sized arteries as well as the small arteries and arterioles. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "hypertension-effects-on-the-blood-vessels"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/hypertension-effects-on-the-heart/", "id": "0fWuPR1AsJ4", "title": "Hypertension effects on the heart", "kind": "Video", "description": "Learn 2 major heart problems that hypertension can cause. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "hypertension-effects-on-the-heart"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension/4-lifestyle-changes-to-help-manage-hypertension/", "id": "Y2B6j7poiKI", "title": "4 lifestyle changes to help manage hypertension", "kind": "Video", "description": "Remember that a good diet, exercise, losing weight, and quitting smoking can lower blood pressure! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "4-lifestyle-changes-to-help-manage-hypertension"}], "in_knowledge_map": false, "description": "Nearly one billion people in the world have high blood pressure. That\u2019s 1 in every 7 people! With the amount of unhealthy foods becoming increasingly available to everyone, it makes sense that this number is climbing. This set of videos will explore high blood pressure, also known as hypertension. Learn more about it, what it does to different parts of the body, symptoms of hypertension, and what you can do with your everyday life to manage it!", "node_slug": "hypertension", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/hypertension", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/hypertension", "kind": "Topic", "slug": "hypertension"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/", "id": "heart-failure", "hide": false, "title": "Heart failure", "child_data": [{"kind": "Article", "id": "x35330429"}, {"kind": "Video", "id": "xe3ef82e5"}, {"kind": "Video", "id": "xca053ff7"}, {"kind": "Video", "id": "x7576b6a6"}, {"kind": "Video", "id": "x37ba0114"}, {"kind": "Video", "id": "xd58bf313"}, {"kind": "Video", "id": "x91adf38c"}, {"kind": "Video", "id": "x98208158"}, {"kind": "Video", "id": "xdbb6de08"}, {"kind": "Video", "id": "x41aabd1a"}, {"kind": "Video", "id": "xf5b79426"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/what-is-heart-failure/", "id": "2aiRpr5UCZs", "title": "What is heart failure?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-heart-failure"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/systolic-heart-failure-pathophysiology/", "id": "FL3Q5Q6IdAY", "title": "Systolic heart failure pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "systolic-heart-failure-pathophysiology"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/diastolic-heart-failure-pathophysiology/", "id": "rGAIHFB9FL0", "title": "Diastolic heart failure pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diastolic-heart-failure-pathophysiology"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/compensation-and-decompensation-in-heart-failure/", "id": "x8aBKMYqGPY", "title": "Compensation and decompensation in heart failure", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "compensation-and-decompensation-in-heart-failure"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/symptoms-of-left-sided-heart-failure/", "id": "CYr4n5KJ-yw", "title": "Symptoms of left sided heart failure", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "symptoms-of-left-sided-heart-failure"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/symptoms-of-right-sided-heart-failure/", "id": "pLba3OzsfDU", "title": "Symptoms of right sided heart failure", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "symptoms-of-right-sided-heart-failure"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/heart-failure-diagnosis/", "id": "AScf1Z40lng", "title": "Heart failure diagnosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "heart-failure-diagnosis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/heart-failure-treatment-early-stages/", "id": "PJgRZA5mE0s", "title": "Heart failure treatment - Early stages", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "heart-failure-treatment-early-stages"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/heart-failure-treatment-late-stages/", "id": "JDo9LNMOLtE", "title": "Heart failure treatment - Late stages", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "heart-failure-treatment-late-stages"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-failure/heart-failure-treatment-devices-and-surgery/", "id": "1q06qHX1K-I", "title": "Heart failure treatment - Devices and surgery", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "heart-failure-treatment-devices-and-surgery"}], "in_knowledge_map": false, "description": "", "node_slug": "heart-failure", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/heart-failure", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/heart-failure", "kind": "Topic", "slug": "heart-failure"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/aortic-dissection-and-aneurysm/", "id": "aortic-dissection-and-aneurysm", "hide": false, "title": "Aortic dissection and aneurysm", "child_data": [{"kind": "Video", "id": "x86c2425a"}, {"kind": "Video", "id": "xfb3b518b"}, {"kind": "Video", "id": "xc4f95b99"}, {"kind": "Video", "id": "x35318c31"}, {"kind": "Video", "id": "x91f8fd5d"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/aortic-dissection-and-aneurysm/what-is-aortic-dissection/", "id": "PRl8TLUleZg", "title": "What is an aortic dissection?", "kind": "Video", "slug": "what-is-aortic-dissection"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/aortic-dissection-and-aneurysm/thoracic-aortic-aneurysms/", "id": "xHUsdE880so", "title": "Thoracic aortic aneurysms", "kind": "Video", "slug": "thoracic-aortic-aneurysms"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/aortic-dissection-and-aneurysm/abdominal-aortic-aneurysms/", "id": "P1paaFPcdak", "title": "Abdominal aortic aneurysms", "kind": "Video", "slug": "abdominal-aortic-aneurysms"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/aortic-dissection-and-aneurysm/aortic-dissection-treatment/", "id": "JfZ38uHaTEk", "title": "Aortic dissection treatment", "kind": "Video", "slug": "aortic-dissection-treatment"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/aortic-dissection-and-aneurysm/aneurysm-treatment/", "id": "VdQ6lAhKGTc", "title": "Aneurysm treatment", "kind": "Video", "slug": "aneurysm-treatment"}], "in_knowledge_map": false, "description": "When a patient with hypertension and chest pain radiating to the back presents to the hospital, one should suspect aortic dissection, which is a tear of the inner lining (tunica intima) of the aorta, with dissection of blood through its middle layer (tunica media). And when an elderly male presents with a pulsatile abdominal mass, one should suspect a rupturing abdominal aortic aneurysm. An aneurysm is simply a balloon-like dilation of a vessel wall. You will come to an understanding of the pathophysiology of these life-threatening diseases in addition to their surgical and medical management.", "node_slug": "aortic-dissection-and-aneurysm", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/aortic-dissection-and-aneurysm", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/aortic-dissection-and-aneurysm", "kind": "Topic", "slug": "aortic-dissection-and-aneurysm"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/myocarditis-and-pericarditis/", "id": "myocarditis-and-pericarditis", "hide": false, "title": "Myocarditis and pericarditis", "child_data": [{"kind": "Video", "id": "xa70d6eb8"}, {"kind": "Video", "id": "x48ea3e50"}, {"kind": "Video", "id": "x39727935"}, {"kind": "Video", "id": "x3d99d06f"}, {"kind": "Video", "id": "xf79296dd"}, {"kind": "Video", "id": "x1634be12"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/myocarditis-and-pericarditis/what-is-myocarditis-and-pericarditis/", "id": "xL98lBuAn1A", "title": "What is myocarditis and pericarditis?", "kind": "Video", "slug": "what-is-myocarditis-and-pericarditis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/myocarditis-and-pericarditis/causes-of-myocarditis/", "id": "Ewif2XGL2a8", "title": "Causes of myocarditis", "kind": "Video", "slug": "causes-of-myocarditis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/myocarditis-and-pericarditis/causes-of-pericarditis/", "id": "Ij_ERo1Ashc", "title": "Causes of pericarditis", "kind": "Video", "slug": "causes-of-pericarditis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/myocarditis-and-pericarditis/diagnosis-of-myocarditis-and-pericarditis-part-1/", "id": "OwDXViQn6tw", "title": "Diagnosis of myocarditis and pericarditis (part 1)", "kind": "Video", "slug": "diagnosis-of-myocarditis-and-pericarditis-part-1"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/myocarditis-and-pericarditis/diagnosis-of-myocarditis-and-pericarditis-part-2/", "id": "R1y2m2OB1x0", "title": "Diagnosis of myocarditis and pericarditis (part 2)", "kind": "Video", "slug": "diagnosis-of-myocarditis-and-pericarditis-part-2"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/myocarditis-and-pericarditis/treatment-of-myocarditis-and-pericarditis/", "id": "NpuvcuzXn9w", "title": "Myocarditis and pericarditis treatment", "kind": "Video", "slug": "treatment-of-myocarditis-and-pericarditis"}], "in_knowledge_map": false, "description": "Inflammation of the heart muscle and the fibrous sac surrounding the heart are called myocarditis and pericarditis, respectively. Each of these disorders present with specific signs and symptoms. For instance, pericarditis sometimes presents with a subtle finding when listening to the heart with the stethoscope, termed the friction rub. You will come to appreciate the clinical differences between these diseases as well as their therapeutic management.Hell", "node_slug": "myocarditis-and-pericarditis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/myocarditis-and-pericarditis", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/myocarditis-and-pericarditis", "kind": "Topic", "slug": "myocarditis-and-pericarditis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/cardiomyopathy/", "id": "cardiomyopathy", "hide": false, "title": "Cardiomyopathy", "child_data": [{"kind": "Video", "id": "xb595eb1f"}, {"kind": "Video", "id": "x4d3d3ac5"}, {"kind": "Video", "id": "x5a7a03c4"}, {"kind": "Video", "id": "xa9eadb1b"}, {"kind": "Video", "id": "x3094b9da"}, {"kind": "Video", "id": "x10f7ae29"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/cardiomyopathy/what-is-cardiomyopathy/", "id": "SXYeQDrH36Y", "title": "What is cardiomyopathy?", "kind": "Video", "slug": "what-is-cardiomyopathy"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cardiomyopathy/cardiomyopathy-signs-and-symptoms/", "id": "iL6aM2xFixU", "title": "Cardiomyopathy signs and symptoms", "kind": "Video", "slug": "cardiomyopathy-signs-and-symptoms"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cardiomyopathy/dilated-cardiomyopathy-pathophysiology-and-diagnosis/", "id": "ou3a7Htbrvw", "title": "Dilated cardiomyopathy: Pathophysiology and diagnosis", "kind": "Video", "slug": "dilated-cardiomyopathy-pathophysiology-and-diagnosis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cardiomyopathy/hypertrophic-cardiomyopathy-pathophysiology-and-diagnosis/", "id": "VtqrKxJmBn4", "title": "Hypertrophic cardiomyopathy: Pathophysiology and diagnosis", "kind": "Video", "slug": "hypertrophic-cardiomyopathy-pathophysiology-and-diagnosis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cardiomyopathy/restrictive-cardiomyopathy-pathophysiology-and-diagnosis/", "id": "CRfgLoV25tA", "title": "Restrictive cardiomyopathy: Pathophysiology and diagnosis", "kind": "Video", "slug": "restrictive-cardiomyopathy-pathophysiology-and-diagnosis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cardiomyopathy/cardiomyopathy-treatment/", "id": "ithdrJuSj3A", "title": "Cardiomyopathy treatment", "kind": "Video", "slug": "cardiomyopathy-treatment"}], "in_knowledge_map": false, "description": "Cardiomyopathy encompasses a group of diseases in which the myocardium (heart muscle) is unable to contract, leading to cardiac dysfunction. These flavors come in three flavors - dilated, restrictive, and hypertrophic. Patients unfortunately are at risk for heart failure, arrhythmias, and sudden cardiac death. We will discuss the signs and symptoms of the cardiomyopathies as well as what clinicians can do to treat these conditions.", "node_slug": "cardiomyopathy", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/cardiomyopathy", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/cardiomyopathy", "kind": "Topic", "slug": "cardiomyopathy"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/", "id": "dysrhythmias-and-tachycardias", "hide": false, "title": "Cardiac dysrhythmias and tachycardias", "child_data": [{"kind": "Video", "id": "x9cae2691"}, {"kind": "Video", "id": "xaba776f0"}, {"kind": "Video", "id": "x9a40aecd"}, {"kind": "Video", "id": "xb9718cdc"}, {"kind": "Video", "id": "x8cd4127f"}, {"kind": "Video", "id": "xd501900f"}, {"kind": "Video", "id": "xb14601d0"}, {"kind": "Video", "id": "x450b243f"}, {"kind": "Video", "id": "x6fcf483c"}, {"kind": "Video", "id": "xf42958f2"}, {"kind": "Video", "id": "x2bc11ae9"}, {"kind": "Video", "id": "xec67ec4f"}, {"kind": "Video", "id": "x8ba1d867"}, {"kind": "Video", "id": "xd53a96f0"}, {"kind": "Video", "id": "x39a0c7dd"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/electrical-conduction-in-heart-cells/", "id": "TQwe0Y4Ynjs", "title": "Electrical conduction in heart cells", "kind": "Video", "slug": "electrical-conduction-in-heart-cells"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/normal-sinus-rhythm-on-ecg/", "id": "lRHq7sMRWpU", "title": "Normal sinus rhythm on an EKG", "kind": "Video", "slug": "normal-sinus-rhythm-on-ecg"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/supraventricular-tachycardia/", "id": "eCrQDI1OAeU", "title": "Supraventricular tachycardia (SVT)", "kind": "Video", "slug": "supraventricular-tachycardia"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/atrial-fibrillation/", "id": "0FufW_MZMa4", "title": "Atrial fibrillation (Afib)", "kind": "Video", "slug": "atrial-fibrillation"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/atrial-flutter/", "id": "0URl8p39wQo", "title": "Atrial flutter (AFL)", "kind": "Video", "slug": "atrial-flutter"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/multifocal-atrial-tachycardia/", "id": "5brsc8IbWSk", "title": "Multifocal atrial tachycardia (MAT)", "kind": "Video", "slug": "multifocal-atrial-tachycardia"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/avrt-avnrt/", "id": "tRuvXP-H164", "title": "Atrioventricular reentrant tachycardia (AVRT) & AV nodal reentrant tachycardia (AVNRT)", "kind": "Video", "slug": "avrt-avnrt"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/ventricular-tachycardias/", "id": "C1smdOKd4Ds", "title": "Ventricular tachycardia (Vtach)", "kind": "Video", "slug": "ventricular-tachycardias"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/torsades-de-pointes/", "id": "niTxSf60wDs", "title": "Torsades de pointes", "kind": "Video", "slug": "torsades-de-pointes"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/ventricular-fibrillation/", "id": "BSf_YIyZzi8", "title": "What is ventricle fibrillation (Vfib)?", "kind": "Video", "slug": "ventricular-fibrillation"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/pulseless-electrical-activity-asystole/", "id": "_HXl3mu1IoM", "title": "Pulseless electrical activity (PEA) and asystole", "kind": "Video", "slug": "pulseless-electrical-activity-asystole"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/electrocardioversion/", "id": "el6nuUsff84", "title": "Electrocardioversion", "kind": "Video", "slug": "electrocardioversion"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/pacemakers/", "id": "b3xMC6zdrvM", "title": "Pacemakers", "kind": "Video", "slug": "pacemakers"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/antiarrhythmics/", "id": "5xSEZszGDtI", "title": "Antiarrhythmics", "kind": "Video", "slug": "antiarrhythmics"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias/ablation/", "id": "vbslqfcBpnU", "title": "Ablation", "kind": "Video", "slug": "ablation"}], "in_knowledge_map": false, "description": "Your heart is an electrical organ, and it produces a rather rhythmic music - lub-dub, lub-dub. We are able to measure its music through the electrocardiogram (EKG), which is able to pick up pathological rhythms - supraventricular tachycardias, atrial fibrillation, and ventricular tachyardia for instance- through electrical leads placed on the chest. We will discover how to identify these dysrthymias as well as how these conditions are treated, such as through the use of anti-arrhythmic drugs and pacemakers.", "node_slug": "dysrhythmias-and-tachycardias", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/dysrhythmias-and-tachycardias", "kind": "Topic", "slug": "dysrhythmias-and-tachycardias"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases/", "id": "heart-valve-diseases", "hide": false, "title": "Heart valve diseases", "child_data": [{"kind": "Video", "id": "xead4cc55"}, {"kind": "Video", "id": "x3932133b"}, {"kind": "Video", "id": "xcf2aa2d0"}, {"kind": "Video", "id": "x8106743a"}, {"kind": "Video", "id": "x6a5247b5"}, {"kind": "Video", "id": "x0693030b"}, {"kind": "Video", "id": "x3ea51c9d"}, {"kind": "Video", "id": "x0957c542"}, {"kind": "Video", "id": "x665cc3fc"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases/what-is-valvular-heart-disease/", "id": "Wyxz0fgp6-A", "title": "What is valvular heart disease?", "kind": "Video", "slug": "what-is-valvular-heart-disease"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases/valvular-heart-disease-causes/", "id": "R4qy9beFpHw", "title": "Valvular heart disease causes", "kind": "Video", "slug": "valvular-heart-disease-causes"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases/how-to-identify-murmurs/", "id": "sGHV5_ieDP4", "title": "How to identify murmurs", "kind": "Video", "slug": "how-to-identify-murmurs"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases/systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-1/", "id": "6YY3OOPmUDA", "title": "Systolic murmurs, diastolic murmurs, and extra heart sounds - Part 1", "kind": "Video", "slug": "systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-1"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases/systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-2/", "id": "ZUHpAaVpiY8", "title": "Systolic murmurs, diastolic murmurs, and extra heart sounds - Part 2", "kind": "Video", "slug": "systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-2"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases/aortic-stenosis-and-aortic-regurgitation/", "id": "3t1n5szXriQ", "title": "Aortic stenosis and aortic regurgitation", "kind": "Video", "slug": "aortic-stenosis-and-aortic-regurgitation"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases/mitral-valve-regurgitation-and-mitral-valve-prolapse/", "id": "Bjnw_jwDt1Q", "title": "Mitral valve regurgitation and mitral valve prolapse", "kind": "Video", "slug": "mitral-valve-regurgitation-and-mitral-valve-prolapse"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases/mitral-stenosis/", "id": "0k0iKKF2-Do", "title": "Mitral stenosis", "kind": "Video", "slug": "mitral-stenosis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases/valvular-heart-disease-diagnosis-and-treatment/", "id": "8HSeHRGihkY", "title": "Valvular heart disease diagnosis and treatment", "kind": "Video", "slug": "valvular-heart-disease-diagnosis-and-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "heart-valve-diseases", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/heart-valve-diseases", "kind": "Topic", "slug": "heart-valve-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/acyanotic-heart-diseases/", "id": "acyanotic-heart-diseases", "hide": false, "title": "Acyanotic heart diseases", "child_data": [{"kind": "Video", "id": "x84f351ba"}, {"kind": "Video", "id": "xd97d69be"}, {"kind": "Video", "id": "x0cf228a7"}, {"kind": "Video", "id": "x6a510446"}, {"kind": "Video", "id": "x22bf1bc9"}, {"kind": "Video", "id": "x947323ac"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/acyanotic-heart-diseases/what-is-acyanotic-heart-disease/", "id": "rbWaiXa9A1k", "title": "What is acyanotic heart disease?", "kind": "Video", "description": "Acyanotic heart disease is a group of heart conditions where blood with oxygen mixes with blood with little oxygen in the heart. This mixing is not enough to cause cyanosis, a symptom of not enough oxygen being delivered to tissues of the body, hence the name acyanotic heart disease.", "slug": "what-is-acyanotic-heart-disease"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/acyanotic-heart-diseases/acyanotic-heart-disasee-diagnosis/", "id": "tOUys6vlTvE", "title": "Acyanotic heart disease diagnosis", "kind": "Video", "description": "How do we know a patient has an acyanotic heart disease? Learn how health care professionals use a variety of tools to diagnosis these conditions, such as stethoscopes, chest x-rays, echocardiogram, and electrocardiograms (ECG or EKG).", "slug": "acyanotic-heart-disasee-diagnosis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/acyanotic-heart-diseases/what-is-eisenmenger-syndrome/", "id": "qJCoXVdPowo", "title": "What is Eisenmenger syndrome?", "kind": "Video", "description": "Eisenmenger's syndrome is when blood in the heart shunts from right-to-left due to increased pressure in the right ventricle. This increased pressure is usually caused by extra blood flowing through the blood vessels of the lungs, originally caused by left-to-right shunting of blood from a hole in the heart wall.", "slug": "what-is-eisenmenger-syndrome"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/acyanotic-heart-diseases/atrial-septal-defect/", "id": "UNWxKDvBFik", "title": "Atrial septal defect", "kind": "Video", "description": "An atrial septal defect is a hole between the two atriums of the heart. Normally this hole is present at birth but closes within a few days of life. Failure of this hole to close is called an atrial septal defect, and usually is asymptomatic (no obvious symptoms are present).", "slug": "atrial-septal-defect"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/acyanotic-heart-diseases/rn-ventricular-septal-defect/", "id": "lZSi0xifXwc", "title": "Ventricular septal defect", "kind": "Video", "description": "An ventricular septal defect is a hole between the two ventricles of the heart. Normally this hole is present at birth but closes within a few days of life. Failure of this hole to close is called a ventricular septal defect, and usually is asymptomatic (no obvious symptoms are present).", "slug": "rn-ventricular-septal-defect"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/acyanotic-heart-diseases/patent-ductus-arteriosus/", "id": "U2fGKvbir24", "title": "Patent ductus arteriosus", "kind": "Video", "description": "Patent ductus arteriosus is a medical condition where a blood vessel called the ductus arteriosus does not permanently close after birth. Learn why the ductus arteriosus does not close, why patients with this condition have a wide pulse pressure, and how the disease is treated with surgery and nonsteroidal anti-inflammatory drugs (NSAIDs).", "slug": "patent-ductus-arteriosus"}], "in_knowledge_map": false, "description": "Acyanotic means, quite simply \u201cnot blue.\u201d When deoxygenated blood is pumped out by our heart into our vessels. Fortunately, not all congenital heart diseases result in cyanosis. In this module, we will discuss these acyanotic heart diseases, from atrial septal defect to patent ductus arteriosus as well as the embryological defects that lead to them.", "node_slug": "acyanotic-heart-diseases", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/acyanotic-heart-diseases", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/acyanotic-heart-diseases", "kind": "Topic", "slug": "acyanotic-heart-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/", "id": "cyanotic-heart-diseases", "hide": false, "title": "Cyanotic heart diseases", "child_data": [{"kind": "Video", "id": "x8ef614e6"}, {"kind": "Video", "id": "xf2b62153"}, {"kind": "Video", "id": "xe947035a"}, {"kind": "Video", "id": "x20f0b6aa"}, {"kind": "Video", "id": "x5f5a0485"}, {"kind": "Video", "id": "xf512ab3d"}, {"kind": "Video", "id": "x36b7249d"}, {"kind": "Video", "id": "x9d677e74"}, {"kind": "Video", "id": "x3749b01f"}, {"kind": "Video", "id": "xc7df254e"}, {"kind": "Video", "id": "x0a98ab7a"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/what-is-cyanotic-heart-disease/", "id": "E2qP4TsHGGQ", "title": "What is cyanotic heart disease", "kind": "Video", "slug": "what-is-cyanotic-heart-disease"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/shunting-in-the-heart/", "id": "gm7lIcBkXFc", "title": "Shunting in the heart", "kind": "Video", "slug": "shunting-in-the-heart"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/einsenmenger-coarctation-of-aorta/", "id": "R0OM94TaZOo", "title": "Einsenmenger coarctation of aorta", "kind": "Video", "slug": "einsenmenger-coarctation-of-aorta"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/tetralogy-of-fallot/", "id": "Be3tuYMgA9I", "title": "Tetralogy of fallot", "kind": "Video", "slug": "tetralogy-of-fallot"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/truncus-arteriosus/", "id": "HrMgmnZ_4gs", "title": "Truncus arteriosus", "kind": "Video", "slug": "truncus-arteriosus"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/total-anomalous-pulmonary-venous-return/", "id": "607Buvyc0VI", "title": "Total anomalous pulmonary venous return", "kind": "Video", "slug": "total-anomalous-pulmonary-venous-return"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/tricuspid-atresia/", "id": "BE0nxWUAg-A", "title": "Tricuspid atresia", "kind": "Video", "slug": "tricuspid-atresia"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/transposition-of-great-arteries/", "id": "ons-gYLeNjU", "title": "Transposition of great arteries", "kind": "Video", "slug": "transposition-of-great-arteries"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/ebsteins-anomoly/", "id": "rQSclv1Ah5s", "title": "Ebstein's anomoly", "kind": "Video", "slug": "ebsteins-anomoly"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/hypoplastic-left-heart-syndrome-and-norwood-glenn-fontan/", "id": "4GUm8ybncWY", "title": "Hypoplastic left heart syndrome and norwood glenn fontan", "kind": "Video", "slug": "hypoplastic-left-heart-syndrome-and-norwood-glenn-fontan"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases/cyanotic-heart-diseases-diagnosis-and-treatment/", "id": "oeyCaB_sj-0", "title": "Cyanotic heart diseases - Diagnosis and treatment", "kind": "Video", "slug": "cyanotic-heart-diseases-diagnosis-and-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "cyanotic-heart-diseases", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/cyanotic-heart-diseases", "kind": "Topic", "slug": "cyanotic-heart-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/", "id": "shock", "hide": false, "title": "Shock", "child_data": [{"kind": "Video", "id": "x5eb6c03b"}, {"kind": "Video", "id": "xd1ddf33e"}, {"kind": "Video", "id": "x7e3f12ec"}, {"kind": "Video", "id": "x6aaf4c04"}, {"kind": "Video", "id": "xdf9dea7e"}, {"kind": "Video", "id": "xea18a85a"}, {"kind": "Video", "id": "x5578b14a"}, {"kind": "Video", "id": "x4e45e31c"}, {"kind": "Video", "id": "x57602ead"}, {"kind": "Video", "id": "x3c240739"}, {"kind": "Video", "id": "x726728d4"}, {"kind": "Video", "id": "xff9b0304"}, {"kind": "Video", "id": "x1883374a"}, {"kind": "Video", "id": "x2835caa2"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/what-is-shock/", "id": "AvtS_IrlbYk", "title": "What is shock?", "kind": "Video", "slug": "what-is-shock"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/shock-hemodynamics/", "id": "j_s5p0mLZ7s", "title": "Shock - hemodynamics", "kind": "Video", "slug": "shock-hemodynamics"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/shock-oxygen-delivery-and-metabolism/", "id": "iRjCDGpjJ3I", "title": "Shock - oxygen delivery and metabolism", "kind": "Video", "slug": "shock-oxygen-delivery-and-metabolism"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/shock-diagnosis-and-treatment/", "id": "_eBq2hRETmA", "title": "Shock - diagnosis and treatment", "kind": "Video", "slug": "shock-diagnosis-and-treatment"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/cardiogenic-shock/", "id": "-0zm323sehQ", "title": "Cardiogenic shock", "kind": "Video", "slug": "cardiogenic-shock"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/sepsis-sirs-mods/", "id": "emOgJCoUy6Q", "title": "Sepsis: Systemic inflammatory response syndrome (SIRS) to multiple organ dysfunction syndrome (MODS)", "kind": "Video", "slug": "sepsis-sirs-mods"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/septic-shock-pathophysiology-and-symptoms/", "id": "-bt-H5VQl5E", "title": "Septic shock - pathophysiology and symptoms", "kind": "Video", "slug": "septic-shock-pathophysiology-and-symptoms"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/septic-shock-diagnosis-and-treatment/", "id": "ExJC8AoAczE", "title": "Septic shock: Diagnosis and treatment", "kind": "Video", "slug": "septic-shock-diagnosis-and-treatment"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/hypovolemic-shock/", "id": "wbfDqHk-ryM", "title": "Hypovolemic shock", "kind": "Video", "slug": "hypovolemic-shock"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/neurogenic-shock/", "id": "-Y3CbsxhlQE", "title": "Neurogenic shock", "kind": "Video", "slug": "neurogenic-shock"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/obstructive-shock/", "id": "iEVciE2j6ZA", "title": "Obstructive shock", "kind": "Video", "slug": "obstructive-shock"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/anaphylactic-shock/", "id": "sX97LcDpgzo", "title": "Anaphylactic shock", "kind": "Video", "slug": "anaphylactic-shock"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/dissociative-shock/", "id": "Phu1yteO-HU", "title": "Dissociative shock", "kind": "Video", "slug": "dissociative-shock"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/shock/differentiating-shock/", "id": "CYoxfm0kcsQ", "title": "Differentiating shock", "kind": "Video", "slug": "differentiating-shock"}], "in_knowledge_map": false, "description": "Shock is a rather common clinical situation, especially in the emergency room. Quite simply, circulatory shock refers to poor perfusion of organs with blood. For example, shock may result from loss of blood (hemorrhage), a poorly functioning heart (heart failure), or dilated blood vessels (sepsis and anaphylactic shock). We will explore how to differentiate the many different causes of shock here.", "node_slug": "shock", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/shock", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/shock", "kind": "Topic", "slug": "shock"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/", "id": "vasculitis", "hide": false, "title": "Vasculitis", "child_data": [{"kind": "Video", "id": "x38860951"}, {"kind": "Video", "id": "xb0b35346"}, {"kind": "Video", "id": "x49b30160"}, {"kind": "Video", "id": "x6c67f968"}, {"kind": "Video", "id": "x9d92e453"}, {"kind": "Video", "id": "xbef79b5c"}, {"kind": "Video", "id": "x271e8772"}, {"kind": "Video", "id": "x71621334"}, {"kind": "Video", "id": "xae3c8fc9"}, {"kind": "Video", "id": "xb29e0e12"}, {"kind": "Video", "id": "x2302bda2"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/what-is-vasculitis/", "id": "qMaVLzWnS80", "title": "What is vasculitis?", "kind": "Video", "description": "Vasculitis is a group of medical conditions which cause damage to the blood vessels through inflammation. Depending on which blood vessels are affected, vasculitis can be classified as large vessel, medium vessel, or small vessel vasculitis. Learn about the signs and symptoms of vasculitis such as purpura, bloody stool and urine, and bruits.", "slug": "what-is-vasculitis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/vasculitis-pathophysiology/", "id": "cf_i8LicBEY", "title": "Vasculitis pathophysiology", "kind": "Video", "description": "Vasculitis occurs when antibodies (part of the immune system of the body) accidentally mistake the proteins on blood vessels to be foreign (don\u2019t belong in the body). The immune system attacks the blood vessel cells and damages them. Learn how fibrinoid necrosis occurs to the blood vessels, and how the build up of fibrin impairs blood flow.", "slug": "vasculitis-pathophysiology"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/temporal-arteritis/", "id": "UtIFoMuyh_4", "title": "Temporal arteritis", "kind": "Video", "description": "Temporal arteritis (otherwise known as giant-cell arteritis) is a type of vasculitis that affects medium to large arteries in the head. Patients with temporal arteritis can have symptoms like migraines and sudden vision problems. Learn how health care professionals diagnosis temporal arteritis by examining blood work (such as erythrocyte sedimentation rate, granulomas) and taking samples (biopsies) of vascular tissue.", "slug": "temporal-arteritis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/takayasu-arteritis/", "id": "VdaTuNbyDHg", "title": "Takayasu arteritis", "kind": "Video", "description": "Takayasu arteritis (also known as the pulseless disease) is a type of vasculitis that affects large arteries and leads to significant narrowing of the vasculature. Patients with takayasu arteritis can have symptoms like weak or absent pulses in extremities, widely varying blood pressures, and dizziness. Learn how health care professionals diagnosis takayasu arteritis by examining blood work (such as erythrocyte sedimentation rate, granulomas), and taking samples (biopsies) of vascular tissue,", "slug": "takayasu-arteritis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/polyarteritis-nodosa/", "id": "4bilImPrYE0", "title": "Polyarteritis nodosa", "kind": "Video", "description": "Polyarteritis nodosa is a type of vasculitis that affects small to medium arteries and leads to significant narrowing of the vasculature. Patients with polyarteritis nodosa can have symptoms like bloody diarrhea, skin lesions, and impaired motor function caused by neuropathy. Learn how health care professionals diagnose and treat polyarteritis nodosa by examining arteriograms and prescribing steroids.", "slug": "polyarteritis-nodosa"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/kawasaki-disease/", "id": "MK-dN5WVVrk", "title": "What is Kawasaki disease?", "kind": "Video", "description": "Kawasaki disease (also known as mucocutaneous lymph node syndrome) is a type of vasculitis that affects medium arteries. Patients with Kawasaki disease can have symptoms like rashes on the palms of hands, soles of feet, in the eyes, and on the tongue (called strawberry tongue).", "slug": "kawasaki-disease"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/kawasaki-disease-diagnosis-and-treatment/", "id": "6RpVjF4N8nY", "title": "Kawasaki disease: diagnosis and treatment", "kind": "Video", "description": "Kawasaki disease is diagnosed off the presence of symptoms rather than the results of tests. Symptoms include: conjunctivitis, rash, adenopathy, strawberry tongue, and rash on palms and soles of hands and feet. Four of these symptoms must be present, in addition to a fever which has lasted more than 5 days to confirm a diagnosis. Learn about atypical Kawasaki disease, and how health professional treat the disease using intravenous immunoglobulins (IVIG) and acetylsalicylic acid.", "slug": "kawasaki-disease-diagnosis-and-treatment"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/buerger-disease/", "id": "i9z6x1LbdW8", "title": "Buerger disease", "kind": "Video", "description": "Buerger disease (also known as the thromboangiitis obliterans) is a type of vasculitis that affects small and medium blood vessels and has been linked strongly to smoking. Buerger disease is characterised by poor blood flow through blood vessels due to inflammation and blood clotting. Symptoms typically include pain (claudication), increased sensitivity to cold, diminished pulses, and cyanosis. Gangrene is often a complication which may require amputation of the affected area. Learn how health care professionals diagnose Buerger disease using ultrasound and angiography.", "slug": "buerger-disease"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/wegeners-granulomatosis-and-microscopic-polyangiitis/", "id": "Ax98k35h_jk", "title": "Wegener\u2019s granulomatosis and microscopic polyangiitis", "kind": "Video", "description": "Wegener\u2019s granulomatosis (also known as granulomatosis with polyangiitis) is a type of vasculitis that affects small and medium blood vessels. Symptoms can include saddle nose deformity, chronic sinusitis, and collapsed trachea. Microscopic polyangiitis is similar to wegener\u2019s granulomatosis except it only affects small blood vessels in the lungs or kidneys. Learn how the presence of granulomas and antibodies (cANCA and pANCA) differentiate these two conditions.", "slug": "wegeners-granulomatosis-and-microscopic-polyangiitis"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/churg-strauss-syndrome/", "id": "dE7aS-HPwKo", "title": "Churg-Strauss syndrome", "kind": "Video", "description": "Churg-Strauss syndrome (also known as eosinophilic granulomatosis with polyangiitis) is a type of vasculitis that affects small and medium blood vessels. Symptoms of this disease are similar to seasonal allergies, such as runny nose, cough, sneezing. Health professionals diagnosis Churg-Strauss syndrome by examining eosinophil levels and pANCA antibody levels, in addition to the presence of granulomas from a tissue sample (biopsy).", "slug": "churg-strauss-syndrome"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/vasculitis/henoch-schonlein-purpura/", "id": "pZcNmGtp5SA", "title": "Henoch-Schonlein purpura", "kind": "Video", "description": "Henoch-Schonlein purpura (also known as anaphylactoid purpura) is a type of vasculitis that affects small blood vessels and characterized by elevated immunoglobulin A (IgA). Symptoms of this disease include skin lesions, joint pain, blood in urine (hematuria), and abdominal pain. Health professionals diagnosis Henoch-Schonlein purpura through blood tests (elevated IgA). This disease is often treated with steroids.", "slug": "henoch-schonlein-purpura"}], "in_knowledge_map": false, "description": "Inflammation of the blood vessel wall is termed \u201cvasculitis,\u201d though the etiology of these diseases are rather nebulous. They present with nonspecific symptoms like fever, fatigue, weight loss. Large, medium, and small vessels can all be involved. We will explore the specific differences between the various vasculitides, which range from Takayasu arteritis to microscopic polyangitis.", "node_slug": "vasculitis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/vasculitis", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/vasculitis", "kind": "Topic", "slug": "vasculitis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/", "id": "hypertension-2", "hide": false, "title": "Hypertension", "child_data": [{"kind": "Video", "id": "x52bdc6d3"}, {"kind": "Video", "id": "x53ee6e80"}, {"kind": "Video", "id": "x4a5bef03"}, {"kind": "Video", "id": "x0be78424"}, {"kind": "Video", "id": "xe17e1b75"}, {"kind": "Video", "id": "x23e5e79d"}, {"kind": "Video", "id": "x73c3b5c8"}, {"kind": "Video", "id": "xa24c87b8"}, {"kind": "Video", "id": "x0bd0746e"}, {"kind": "Video", "id": "xf939a492"}], "children": [{"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/what-is-hypertension-2/", "id": "l5TsKWd-fO8", "title": "What is hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-hypertension-2"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/stages-of-hypertension/", "id": "SYcsZ6J3xZ4", "title": "Stages of hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "stages-of-hypertension"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/primary-hypertension/", "id": "qyUHnh73Sng", "title": "Primary hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "primary-hypertension"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/hypertension-and-heart-damage/", "id": "SHjxi0bRiLA", "title": "Hypertension and heart damage", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hypertension-and-heart-damage"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/hypertension-and-blood-vessel-damage/", "id": "a3XcYsXQYaM", "title": "Hypertension and blood vessel damage", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hypertension-and-blood-vessel-damage"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/complications-of-hypertension/", "id": "fMG6a6c6Jd4", "title": "Complications of hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "complications-of-hypertension"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/secondary-hypertension/", "id": "zTb4TklMVcY", "title": "Secondary hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "secondary-hypertension"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/diagnosis-of-hypertension/", "id": "_7Jmj6MriKg", "title": "Diagnosis of hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-of-hypertension"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/treatment-of-hypertension/", "id": "913Pj5AxmHQ", "title": "Treatment of hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatment-of-hypertension"}, {"path": "khan/science/health-and-medicine/circulatory-system-diseases/hypertension-2/hypertensive-crisis/", "id": "ePWrbBJgssw", "title": "Hypertensive crisis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hypertensive-crisis"}], "in_knowledge_map": false, "description": "", "node_slug": "hypertension-2", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases/hypertension-2", "extended_slug": "science/health-and-medicine/circulatory-system-diseases/hypertension-2", "kind": "Topic", "slug": "hypertension-2"}], "in_knowledge_map": false, "description": "With the heart pumping 24 hours a day, 7 days a week, it\u2019s absolutely vital to make sure things are flowing smoothly (pun intended!). Unfortunately, this isn\u2019t always the case, and different parts of the circulatory system can cause problems: your heart, your blood vessels, and even the fluid in your tissues and blood itself can be the issue. To further complicate things, the underlying reasons for circulatory system problems vary from your genes (nature) to your lifestyle habits (nurture). An understanding of how different diseases can affect your circulatory system is important to combat this growing problem in the world.", "node_slug": "circulatory-system-diseases", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/circulatory-system-diseases", "extended_slug": "science/health-and-medicine/circulatory-system-diseases", "kind": "Topic", "slug": "circulatory-system-diseases"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/health-and-medicine/respiratory-system/", "id": "respiratory-system", "hide": false, "title": "Advanced respiratory system physiology", "child_data": [{"kind": "Topic", "id": "x934c3541"}, {"kind": "Topic", "id": "x3f397449"}, {"kind": "Topic", "id": "x23de9609"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/", "id": "Respiratory-system-introduction", "hide": false, "title": "Respiratory system introduction", "child_data": [{"kind": "Video", "id": "1150539313"}, {"kind": "Video", "id": "1150475491"}, {"kind": "Video", "id": "1159072701"}, {"kind": "Video", "id": "1179650621"}, {"kind": "Video", "id": "1179655597"}, {"kind": "Video", "id": "xc69180a5"}, {"kind": "Video", "id": "23986"}, {"kind": "Exercise", "id": "x4e2cf098"}, {"kind": "Exercise", "id": "x41bbd5a7"}, {"kind": "Exercise", "id": "x5309e65f"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/meet-the-lungs/", "id": "qGiPZf7njqY", "title": "Meet the lungs", "kind": "Video", "description": "Every time you take a breath, oxygen makes it way into your lungs. Follow along on that journey! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-lungs"}, {"path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/people-and-plants/", "id": "lzWUG4H5QBo", "title": "People and plants", "kind": "Video", "description": "Learn more about photosynthesis and cellular respiration through a classic story: Jack and the Beanstalk. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "people-and-plants"}, {"path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/the-bronchial-tree/", "id": "Z-yv3Yq4Aw4", "title": "The bronchial tree", "kind": "Video", "description": "Follow the path of an oxygen molecule as it makes its way from your mouth down to an alveolus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "the-bronchial-tree"}, {"path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/inhaling-and-exhaling/", "id": "mykrnTh1tz8", "title": "Inhaling and exhaling", "kind": "Video", "description": "Find out exactly why air goes in and out of the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "inhaling-and-exhaling"}, {"path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/how-does-lung-volume-change/", "id": "dTsUyXXudvA", "title": "How does lung volume change?", "kind": "Video", "description": "Learn about how muscle contraction and lung recoil actually help the lungs change their volume with every breath! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "how-does-lung-volume-change"}, {"path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/thermoregulation-in-the-lungs/", "id": "Iya-2bS14ho", "title": "Thermoregulation in the lungs", "kind": "Video", "slug": "thermoregulation-in-the-lungs"}, {"path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/the-lungs-and-pulmonary-system/", "id": "SPGRkexI_cs", "title": "The lungs and pulmonary system", "kind": "Video", "description": "The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles, alveoli and thoracic diaphragm", "slug": "the-lungs-and-pulmonary-system"}, {"path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/lung-quiz/", "id": "lung-quiz", "title": "Introductory respiratory system quiz", "description": "Questions", "slug": "lung-quiz", "kind": "Exercise"}, {"path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/intermediate-lung-quiz/", "id": "intermediate-lung-quiz", "title": "Intermediate respiratory system quiz", "description": "Intermediate Lung Quiz", "slug": "intermediate-lung-quiz", "kind": "Exercise"}, {"path": "khan/science/health-and-medicine/respiratory-system/respiratory-system-introduction/advanced-lung-quiz/", "id": "advanced-lung-quiz", "title": "Advanced respiratory system quiz", "description": "Advanced Lung Quiz", "slug": "advanced-lung-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Did you know that your right lung is larger than your left? That\u2019s because the majority of your heart is on the left side of your body, and your left lung is slightly smaller to accommodate it. The lungs take in oxygen and help you breathe out carbon dioxide. Humans have an intricate respiratory system, with hundreds of millions of tiny air sacs called alveoli, where all of the magic happens. These videos will introduce you to the lungs, and show how they help you survive.", "node_slug": "Respiratory-system-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system/Respiratory-system-introduction", "extended_slug": "science/health-and-medicine/respiratory-system/Respiratory-system-introduction", "kind": "Topic", "slug": "respiratory-system-introduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system/gas_exchange/", "id": "gas_exchange", "hide": false, "title": "Gas exchange", "child_data": [{"kind": "Video", "id": "x8fbef923"}, {"kind": "Video", "id": "x074ad05b"}, {"kind": "Video", "id": "x33409079"}, {"kind": "Video", "id": "xeab45ce1"}, {"kind": "Video", "id": "x934cb9f8"}, {"kind": "Video", "id": "x0f010548"}, {"kind": "Video", "id": "x536c7d31"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system/gas_exchange/alveolar-gas-equation-part-1/", "id": "zZX9jJqSlQs", "title": "Alveolar gas equation - part 1", "kind": "Video", "description": "Find out how to calculate exactly how much oxygen is deep down inside your lungs! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "alveolar-gas-equation-part-1"}, {"path": "khan/science/health-and-medicine/respiratory-system/gas_exchange/alveolar-gas-equation-part-2/", "id": "xH5Y3Kmx82w", "title": "Alveolar gas equation - part 2", "kind": "Video", "description": "Find out how to calculate exactly how much oxygen is deep down inside your lungs! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "alveolar-gas-equation-part-2"}, {"path": "khan/science/health-and-medicine/respiratory-system/gas_exchange/henry-s-law/", "id": "Wiuat7KdMmA", "title": "Henry's law", "kind": "Video", "description": "Explore the relationship between partial pressure of a gas and the concentration of the gas molecule within a liquid. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "henry-s-law"}, {"path": "khan/science/health-and-medicine/respiratory-system/gas_exchange/o2-and-co2-solubility/", "id": "OCD4Dr3kmmA", "title": "O2 and CO2 solubility", "kind": "Video", "description": "Get an intuition for why carbon dioxide is so much more soluble than oxygen when it goes into water. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "o2-and-co2-solubility"}, {"path": "khan/science/health-and-medicine/respiratory-system/gas_exchange/graham-s-law-of-diffusion/", "id": "g6QuuoTs2Oo", "title": "Graham's law of diffusion", "kind": "Video", "description": "Find out whether oxygen or carbon dioxide has a higher rate of diffusion (Hint: It pays to be small!). Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "graham-s-law-of-diffusion"}, {"path": "khan/science/health-and-medicine/respiratory-system/gas_exchange/fick-s-law-of-diffusion/", "id": "Cg4KlmI_acs", "title": "Fick's law of diffusion", "kind": "Video", "description": "Learn all of the different ways to maximize the amount of particles that diffuse over a short distance over time. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "fick-s-law-of-diffusion"}, {"path": "khan/science/health-and-medicine/respiratory-system/gas_exchange/oxygen-movement-from-alveoli-to-capillaries/", "id": "nRpwdwm06Ic", "title": "Oxygen movement from alveoli to capillaries", "kind": "Video", "description": "Watch as a molecule of oxygen makes its way from the alveoli (gas layer) through various liquid layers in order to end up in the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "oxygen-movement-from-alveoli-to-capillaries"}], "in_knowledge_map": false, "description": "If you think of your lungs as a mini factory, you can think of the gases as goods that your body trades. Humans need oxygen for important metabolic activities. For example, when you exercise, your breathe more because your body needs more oxygen! These metabolic activities produce carbon dioxide, which is something your body needs to get rid of to avoid blood acidity. So, keeping with the example of your lungs as a factory, oxygen is an import good, and carbon dioxide is an export good! Learn more about the specific mechanisms of this \u201cgoods exchange\u201d in the tiny air sacs of the lungs: the alveoli.", "node_slug": "gas_exchange", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system/gas_exchange", "extended_slug": "science/health-and-medicine/respiratory-system/gas_exchange", "kind": "Topic", "slug": "gas_exchange"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system/breathing_control/", "id": "breathing_control", "hide": false, "title": "Breathing control", "child_data": [{"kind": "Video", "id": "x8b9eb0eb"}, {"kind": "Video", "id": "x03a3321c"}, {"kind": "Video", "id": "x775cfe3b"}, {"kind": "Video", "id": "xb6078c7d"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system/breathing_control/peripheral-chemoreceptors/", "id": "cJXY3Cywrnc", "title": "Peripheral chemoreceptors", "kind": "Video", "description": "Find out how the your body uses special cells that are peripheral to the brain (outside the brain) to sense levels of O2, CO2, and pH. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "peripheral-chemoreceptors"}, {"path": "khan/science/health-and-medicine/respiratory-system/breathing_control/central-chemoreceptors/", "id": "lVacrVMmJX8", "title": "Central chemoreceptors", "kind": "Video", "description": "Find out how the your body uses special cells that are central to the brain (inside the brain) to sense levels of CO2 and pH. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "central-chemoreceptors"}, {"path": "khan/science/health-and-medicine/respiratory-system/breathing_control/the-respiratory-center/", "id": "_BFDgTci0ck", "title": "The respiratory center", "kind": "Video", "description": "Find out how the respiratory center collects information from all over the body and then helps regulate your breathing. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-respiratory-center"}, {"path": "khan/science/health-and-medicine/respiratory-system/breathing_control/sneeze-cough-and-hiccup/", "id": "V2vR5_B6C5I", "title": "Sneeze, cough, and hiccup", "kind": "Video", "description": "Learn how our brain receives information from mechanoreceptors and then responds by controlling muscles in a well-coordinated system, and how all of this can lead to a sneeze, a cough, or even a hiccup! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "sneeze-cough-and-hiccup"}], "in_knowledge_map": false, "description": "Luckily, we can breathe without thinking which means that we have autonomic control of breathing. If we couldn\u2019t, we would risk dying if we went to sleep (look up Ondine\u2019s curse)! There are times when the body wants more oxygen (like during heavy exercise), and when the body wants less (like when we\u2019re resting). How does our body automatically seem to know when to inhale more, and when to inhale less? Also, if we do have autonomic control of breathing, how is it possible to also have conscious control of our breathing? These questions get to the fundamentals of breathing control.", "node_slug": "breathing_control", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system/breathing_control", "extended_slug": "science/health-and-medicine/respiratory-system/breathing_control", "kind": "Topic", "slug": "breathing_control"}], "in_knowledge_map": false, "description": "Place your hand on your ribs and inhale deeply. You\u2019ll notice that your chest expands and your back straightens. As this occurs, air is rushing through your windpipe and branches off to either your left or right lung. After 20 to 30 more branch points, oxygen in the air ends up in the alveoli where it diffuses into the liquid that surrounds the alveoli, and slips into the blood. This microscopic gas exchange occurs rapidly, oxygen is taken into the body and carbon dioxide is removed from the body, and then you exhale. Learn more about the intricate and fascinating respiratory system in these videos!", "node_slug": "respiratory-system", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/respiratory-system", "extended_slug": "science/health-and-medicine/respiratory-system", "kind": "Topic", "slug": "respiratory-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/", "id": "respiratory-system-diseases", "hide": false, "title": "Respiratory system diseases", "child_data": [{"kind": "Topic", "id": "x4c4583cf"}, {"kind": "Topic", "id": "xdcb1d586"}, {"kind": "Topic", "id": "x09fdbe75"}, {"kind": "Topic", "id": "xf7a4c72c"}, {"kind": "Topic", "id": "x186f76a4"}, {"kind": "Topic", "id": "x7c78ee31"}, {"kind": "Topic", "id": "x295dd66a"}, {"kind": "Topic", "id": "xd1ba5b78"}, {"kind": "Topic", "id": "xbf2935cf"}, {"kind": "Topic", "id": "x524e01bd"}, {"kind": "Topic", "id": "x80b83fce"}, {"kind": "Topic", "id": "x9821ae2d"}, {"kind": "Topic", "id": "xe43fe4f3"}, {"kind": "Topic", "id": "xe9a98b93"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/intro-to-pulmonary-diseases/", "id": "intro-to-pulmonary-diseases", "hide": false, "title": "Introduction to pulmonary diseases", "child_data": [{"kind": "Video", "id": "xa1ed35d5"}, {"kind": "Video", "id": "x6acd3776"}, {"kind": "Article", "id": "x207e925e"}, {"kind": "Video", "id": "x65173286"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/intro-to-pulmonary-diseases/types-of-pulmonary-diseases/", "id": "-oHlcuS7AeU", "title": "Types of pulmonary diseases", "kind": "Video", "description": "Learn what the main classifications of lung diseases are: obstructive, restrictive, ventilation, and perfusion. Discover the classification of common diseases like asthma, emphysema, and pneumonia.", "slug": "types-of-pulmonary-diseases"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/intro-to-pulmonary-diseases/respiratory-distress/", "id": "vO63j9m5grE", "title": "Respiratory distress", "kind": "Video", "description": "How can you tell someone is having troubles breathing? Increased work of breathing, the feeling of shortness of breath, and cyanosis are all common symptoms of respiratory distress. Learn what these symptoms look like and why they occur.", "slug": "respiratory-distress"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/intro-to-pulmonary-diseases/streptococcus-pneumoniae-and-flu-vaccines/", "id": "CNqYNgSYnKM", "title": "Streptococcus pneumoniae and flu vaccines", "kind": "Video", "description": "Why do we need a new flu vaccine every year? Learn about the pneumonia and flu vaccines and how they help your body fight off infection.", "slug": "streptococcus-pneumoniae-and-flu-vaccines"}], "in_knowledge_map": false, "description": "", "node_slug": "intro-to-pulmonary-diseases", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/intro-to-pulmonary-diseases", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/intro-to-pulmonary-diseases", "kind": "Topic", "slug": "intro-to-pulmonary-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/asthma2/", "id": "asthma2", "hide": false, "title": "Asthma", "child_data": [{"kind": "Video", "id": "xd1b3a606"}, {"kind": "Video", "id": "x2585cbb7"}, {"kind": "Video", "id": "x5805eb61"}, {"kind": "Video", "id": "x1bfa7631"}, {"kind": "Video", "id": "x110c3789"}, {"kind": "Video", "id": "xe4b7fb20"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/asthma2/what-is-asthma/", "id": "uX1RzoE_9BI", "title": "What is asthma?", "kind": "Video", "slug": "what-is-asthma"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/asthma2/asthma-pathophysiology/", "id": "ZKvatbn4a_I", "title": "Asthma pathophysiology", "kind": "Video", "slug": "asthma-pathophysiology"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/asthma2/asthma-diagnosis/", "id": "QsqnJHggDaY", "title": "Asthma diagnosis", "kind": "Video", "slug": "asthma-diagnosis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/asthma2/asthma-severity/", "id": "FckjcoZDxbE", "title": "Asthma severity", "kind": "Video", "slug": "asthma-severity"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/asthma2/asthma-shortterm-treatment/", "id": "aUUi1DrghQc", "title": "Asthma shortterm treatments", "kind": "Video", "slug": "asthma-shortterm-treatment"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/asthma2/asthma-longterm-treatment/", "id": "lEXuBpu8jys", "title": "Asthma longterm treatment", "kind": "Video", "slug": "asthma-longterm-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "asthma2", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/asthma2", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/asthma2", "kind": "Topic", "slug": "asthma2"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/emphysema/", "id": "emphysema", "hide": false, "title": "Emphysema (COPD)", "child_data": [{"kind": "Video", "id": "x2ef42ceb"}, {"kind": "Video", "id": "xd834c716"}, {"kind": "Video", "id": "xebf788f4"}, {"kind": "Video", "id": "x79f98264"}, {"kind": "Video", "id": "x5edcd88c"}, {"kind": "Video", "id": "x900a1024"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/emphysema/what-is-emphysema/", "id": "laBUtu_QEEE", "title": "What is emphysema?", "kind": "Video", "description": "Emphysema is a chronic medical condition (most often caused by smoking and air pollution) where lung tissue is damaged and traps air inside the lung. Learn how shortness of breath, persistent cough, and wheezing are common symptoms of this condition and why they occur in emphysema.", "slug": "what-is-emphysema"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/emphysema/emphysema-pathophysiology/", "id": "OiSTT4z4zJI", "title": "Emphysema pathophysiology", "kind": "Video", "description": "Smoking and air pollution cause the alveoli in the lungs stiff and less stretchy, making it difficult for air to escape during exhalation. Learn how the destruction of the protein elastin is key to the progression of emphysema, and how the over production of elastase occurs.", "slug": "emphysema-pathophysiology"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/emphysema/emphysema-diagnosis/", "id": "prL5WuhGPLI", "title": "Emphysema diagnosis", "kind": "Video", "description": "How do we know a patient has emphysema? Learn how the lungs in chest x-rays look hyperinflated, how spirometry can reveal decreased lung function, and what all those blood tests mean.", "slug": "emphysema-diagnosis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/emphysema/dlco/", "id": "oOkNS-vvnhQ", "title": "Diffusing capacity of the lung for carbon monoxide (DLCO)", "kind": "Video", "description": "Diffusing capacity of the lungs for carbon monoxide (DLCO) is a medical test that determines how much oxygen travels from the alveoli of the lungs to the blood stream. Learn what DLCO is, how DLCO a good measure of lung disease severity, and why we use carbon monoxide instead of oxygen or carbon dioxide.", "slug": "dlco"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/emphysema/centriacinar-panacinar-emphysema/", "id": "36dg_h4gwNk", "title": "Centriacinar emphysema vs panacinar emphysema", "kind": "Video", "description": "Centriacinar and panacinar are different classifications of disease emphysema based on the location of the damaged lung tissue. Learn how inflammation can give rise to centriacinar emphysema, and how a deficiency in alpha-1-antitrypsin can lead to panacinar emphysema.", "slug": "centriacinar-panacinar-emphysema"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/emphysema/emphysema-treatment/", "id": "EIm1BSVCpno", "title": "Emphysema treatment", "kind": "Video", "description": "The best way to prevent and manage emphysema is to stop smoking. Learn how drugs such as bronchodilators, antibiotics, and steroids can be used to manage the symptoms of emphysema.", "slug": "emphysema-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "emphysema", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/emphysema", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/emphysema", "kind": "Topic", "slug": "emphysema"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/chronic-bronchitis/", "id": "chronic-bronchitis", "hide": false, "title": "Chronic Bronchitis (COPD)", "child_data": [{"kind": "Video", "id": "x6c8172ca"}, {"kind": "Video", "id": "x842ae588"}, {"kind": "Video", "id": "xb2de5e82"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/chronic-bronchitis/rn-what-is-chronic-bronchitis/", "id": "B5e7RMaz4IQ", "title": "What is chronic bronchitis?", "kind": "Video", "slug": "rn-what-is-chronic-bronchitis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/chronic-bronchitis/rn-chronic-bronchitis-pathophysiology/", "id": "A1XyF5clLbI", "title": "Chronic bronchitis pathophysiology", "kind": "Video", "slug": "rn-chronic-bronchitis-pathophysiology"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/chronic-bronchitis/chronic-bronchitis-treatment/", "id": "iG7dJTInT7E", "title": "Chronic bronchitis treatment", "kind": "Video", "slug": "chronic-bronchitis-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "chronic-bronchitis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/chronic-bronchitis", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/chronic-bronchitis", "kind": "Topic", "slug": "chronic-bronchitis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/cystic-fibrosis/", "id": "cystic-fibrosis", "hide": false, "title": "Cystic fibrosis", "child_data": [{"kind": "Video", "id": "x0b6640c4"}, {"kind": "Video", "id": "x6d185d1c"}, {"kind": "Video", "id": "x2a009823"}, {"kind": "Video", "id": "x043ac475"}, {"kind": "Video", "id": "x2e959b1c"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/cystic-fibrosis/what-is-cystic-fibrosis/", "id": "ucbxYIVztz8", "title": "What is cystic fibrosis?", "kind": "Video", "slug": "what-is-cystic-fibrosis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/cystic-fibrosis/cystic-fibrosis-pathophysiology/", "id": "cu6rfyEMFiQ", "title": "Cystic fibrosis pathophysiology", "kind": "Video", "slug": "cystic-fibrosis-pathophysiology"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/cystic-fibrosis/cystic-fibrosis-diagnosis/", "id": "J0tYHmuig-U", "title": "Cystic fibrosis diagnosis", "kind": "Video", "slug": "cystic-fibrosis-diagnosis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/cystic-fibrosis/cystic-fibrosis-treatment/", "id": "Icakt3gQDtE", "title": "Cystic fibrosis treatments", "kind": "Video", "slug": "cystic-fibrosis-treatment"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/cystic-fibrosis/cystic-fibrosis-complications/", "id": "0mdS4GH7Lkw", "title": "Cystic fibrosis complications", "kind": "Video", "slug": "cystic-fibrosis-complications"}], "in_knowledge_map": false, "description": "", "node_slug": "cystic-fibrosis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/cystic-fibrosis", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/cystic-fibrosis", "kind": "Topic", "slug": "cystic-fibrosis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/occupational-lung-diseases/", "id": "occupational-lung-diseases", "hide": false, "title": "Occupational lung diseases", "child_data": [{"kind": "Video", "id": "x5e4e6c48"}, {"kind": "Video", "id": "x651585fa"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/occupational-lung-diseases/occupational-asthma-and-mesothelioma/", "id": "AgQMgxkYk44", "title": "Occupational asthma and mesothelioma", "kind": "Video", "slug": "occupational-asthma-and-mesothelioma"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/occupational-lung-diseases/asbestosis-silicosis-sick-building-syndrome/", "id": "w1_EEi8-EaI", "title": "Asbestosis, silicosis, sick building syndrome", "kind": "Video", "slug": "asbestosis-silicosis-sick-building-syndrome"}], "in_knowledge_map": false, "description": "", "node_slug": "occupational-lung-diseases", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/occupational-lung-diseases", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/occupational-lung-diseases", "kind": "Topic", "slug": "occupational-lung-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/pulmonary-hypertension/", "id": "pulmonary-hypertension", "hide": false, "title": "Pulmonary hypertension", "child_data": [{"kind": "Video", "id": "xb238d715"}, {"kind": "Video", "id": "x4c13a486"}, {"kind": "Video", "id": "x19726bc9"}, {"kind": "Video", "id": "xe82523a9"}, {"kind": "Video", "id": "x3fb3eca3"}, {"kind": "Video", "id": "xc9c2a5e7"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/pulmonary-hypertension/what-is-pulmonary-hypertension/", "id": "KtkR_NTte4M", "title": "What is pulmonary hypertension?", "kind": "Video", "slug": "what-is-pulmonary-hypertension"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pulmonary-hypertension/pulmonary-hypertension-symptoms-and-causes/", "id": "ZVl1M3D2B80", "title": "Pulmonary hypertension symptoms and causes", "kind": "Video", "slug": "pulmonary-hypertension-symptoms-and-causes"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pulmonary-hypertension/hypoxic-vasoconstriction/", "id": "vZ9vwiGHXgY", "title": "Hypoxic vasoconstriction", "kind": "Video", "slug": "hypoxic-vasoconstriction"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pulmonary-hypertension/pulmonary-hypertension-diagnosis-swan-ganz-catheterization/", "id": "NZlJJ4a40Ww", "title": "Pulmonary hypertension diagnosis Swan Ganz catheterization", "kind": "Video", "slug": "pulmonary-hypertension-diagnosis-swan-ganz-catheterization"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pulmonary-hypertension/pulmonary-hypertension-diagnosis/", "id": "U7fKAYqfpC8", "title": "Pulmonary hypertension diagnosis", "kind": "Video", "slug": "pulmonary-hypertension-diagnosis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pulmonary-hypertension/pulmonary-hypertension-treatment/", "id": "RSMtgI8yyfg", "title": "Pulmonary hypertension treatment", "kind": "Video", "slug": "pulmonary-hypertension-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "pulmonary-hypertension", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/pulmonary-hypertension", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/pulmonary-hypertension", "kind": "Topic", "slug": "pulmonary-hypertension"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/pneumonia/", "id": "pneumonia", "hide": false, "title": "Pneumonia", "child_data": [{"kind": "Video", "id": "x5f142e16"}, {"kind": "Video", "id": "x65173286"}, {"kind": "Video", "id": "x15d69db0"}, {"kind": "Video", "id": "xa3e99595"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/pneumonia/what-is-pneumonia/", "id": "dzJNabJAPaE", "title": "What is pneumonia?", "kind": "Video", "description": "Pneumonia is a medical condition where lung tissue becomes inflamed, usually caused by a virus or bacteria. Learn how shortness of breath, cough, and fever are common symptoms of this condition and why they occur in pneumonia.", "slug": "what-is-pneumonia"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pneumonia/streptococcus-pneumoniae-and-flu-vaccines/", "id": "CNqYNgSYnKM", "title": "Streptococcus pneumoniae and flu vaccines", "kind": "Video", "description": "Why do we need a new flu vaccine every year? Learn about the pneumonia and flu vaccines and how they help your body fight off infection.", "slug": "streptococcus-pneumoniae-and-flu-vaccines"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pneumonia/lung-abscess/", "id": "X1h5kr55SZg", "title": "Pulmonary abscess", "kind": "Video", "description": "Pulmonary abscesses occur when part of the lung tissue dies (caused by damage or infection) and gets trapped in a layer of hard tissue in the lung. Learn what causes abscesses, how they are diagnosed, and how health professionals treat them.", "slug": "lung-abscess"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pneumonia/pneumonia-vs-pneumonitis/", "id": "q2SYtugUdpI", "title": "Pneumonia vs. pneumonitis", "kind": "Video", "description": "Pneumonitis is a term used to describe inflammation of the lung tissues without the presence of an infection, whereas pneumonia is inflammation caused by an infection. Learn what the symptoms of pneumonitis are, and why pneumonitis is more common with bird handlers, farmers, and people who regularly use humidifiers.", "slug": "pneumonia-vs-pneumonitis"}], "in_knowledge_map": false, "description": "", "node_slug": "pneumonia", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/pneumonia", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/pneumonia", "kind": "Topic", "slug": "pneumonia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/pleural-effusion-2/", "id": "pleural-effusion-2", "hide": false, "title": "Pleural Effusion", "child_data": [{"kind": "Video", "id": "x38620935"}, {"kind": "Video", "id": "x749dedfd"}, {"kind": "Video", "id": "x73951981"}, {"kind": "Video", "id": "xfea39199"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/pleural-effusion-2/what-is-pleural-effusion/", "id": "IDLCwhijNG4", "title": "What is a pleural effusion?", "kind": "Video", "description": "Pleural effusions are when excess fluid get caught between two layers of tissue (the visceral and parietal pleurae) surrounding the lungs. This fluid can build up over time, taking up space in the lung and impairing a person\u2019s ability to breath. Learn about the signs and symptoms of pleural effusions such as chest pain, shortness of breath, and dry coughing.", "slug": "what-is-pleural-effusion"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pleural-effusion-2/pleural-effusion-diagnosis-and-treatment/", "id": "XaqsqtWiJMw", "title": "Pleural effusion diagnosis and treatment", "kind": "Video", "description": "How do we know a patient has a pleural effusion? Health professionals use x-rays, and computed tomography (CT scans) to look for extra fluid inside the body. Learn how pleural effusions are treated using techniques such as a thoracentesis, pleurodesis, and pleuroperitoneal shunts.", "slug": "pleural-effusion-diagnosis-and-treatment"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pleural-effusion-2/transudate-vs-exudate/", "id": "qCdNab2WLiw", "title": "Transudate vs exudate", "kind": "Video", "description": "In a pleural effusion, different fluids can enter the pleural cavity. Transudate is fluid pushed through the capillary due to high pressure within the capillary. Exudate is fluid that leaks around the cells of the capillaries caused by inflammation. Learn why transudative fluid does not contain proteins, why exudate does contain proteins, and how health professionals can differentiate between the two using Light\u2019s criteria.", "slug": "transudate-vs-exudate"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/pleural-effusion-2/vein-artery-nerve-bundle/", "id": "9Y-7wohhcSU", "title": "Neurovascular bundle", "kind": "Video", "description": "The neurovascular bundles located underneath the ribs are small collections of blood vessels (veins and arteries) and nerves which supply the tissues of the chest wall. When procedures such as a thoracentesis are performed, health professionals must avoid hitting this bundle. If they do, the patient may have significant bleeding, hypotension, shock, and decreased respiratory function.", "slug": "vein-artery-nerve-bundle"}], "in_knowledge_map": false, "description": "", "node_slug": "pleural-effusion-2", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/pleural-effusion-2", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/pleural-effusion-2", "kind": "Topic", "slug": "pleural-effusion-2"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/lung-cancer/", "id": "lung-cancer", "hide": false, "title": "Lung cancer", "child_data": [{"kind": "Video", "id": "x920189c6"}, {"kind": "Video", "id": "xaacacdbf"}, {"kind": "Video", "id": "xd3bc0185"}, {"kind": "Video", "id": "x72f2595e"}, {"kind": "Video", "id": "x2debdc5f"}, {"kind": "Video", "id": "xc2622da8"}, {"kind": "Video", "id": "x95d53ece"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/lung-cancer/what-is-lung-cancer/", "id": "MhavOq8O0Ho", "title": "What is lung cancer?", "kind": "Video", "description": "Lung cancer is a disease where cells in the lungs multiply uncontrollably. The extra cells take up space in the lungs and impair gas exchange and the lung\u2019s ability to expel dirt. Learn how smoking, radon gas, and air pollution increase the risk of lung cancer.", "slug": "what-is-lung-cancer"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/lung-cancer/lung-cancer-diagnosis/", "id": "JS3wsNY17LY", "title": "Lung cancer diagnosis", "kind": "Video", "description": "How do we know a patient has lung cancer? Learn how health professionals use x-rays, computed tomography (CT scans), positron emission tomography (PET scans), and blood results to confirm lung cancer in patients.", "slug": "lung-cancer-diagnosis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/lung-cancer/lung-cancer-types/", "id": "QKUOYpsbROk", "title": "Lung cancer types", "kind": "Video", "description": "There are several different types of lung cancer, such as small cell lung cancer, non-small cell lung cancer, adenocarcinoma, squamous cell carcinoma, large cell carcinoma, and carcinoid . Learn how each type of lung cancer occurs, and how common they are amongst other lung cancers.", "slug": "lung-cancer-types"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/lung-cancer/lung-cancer-complications/", "id": "TkZ5IywDBnQ", "title": "Lung cancer complications", "kind": "Video", "description": "Learn how the mass of a tumor, the spread of cancer cells, the immune system\u2019s response, and the hormones released from cancer cells contribute to the complications of lung cancer.", "slug": "lung-cancer-complications"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/lung-cancer/lung-cancer-metastasis/", "id": "1jLifFl9HLA", "title": "Lung cancer metastasis", "kind": "Video", "description": "Metastasis is the spread of cancer cells from one area of the body (such as an organ) to another. As cancerous cells multiply, some cells may find their way into the circulating blood or lymphatic systems, where they\u2019re transported around the rest of the body. They may eventually land in another organ where they continue to multiply and spread.", "slug": "lung-cancer-metastasis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/lung-cancer/lung-cancer-stages/", "id": "rAxbnfKXcoE", "title": "Lung cancer staging", "kind": "Video", "description": "Health professionals use special terminology referred to as stages to concisely communicate the progression of cancer disease. Learn how cancer is classified based off the size of the tumor, the involvement of lymph nodes, and whether metastasis has occurred.", "slug": "lung-cancer-stages"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/lung-cancer/lung-cancer-treatment/", "id": "trRl8QXtdMI", "title": "Lung cancer treatment", "kind": "Video", "description": "Lung cancer is treated using a combination of treatments such as chemotherapy, radiation, and a variety of surgical procedures (such as wedge resections, pneumonectomies, and segmental resections). Learn about the complications and side effects of treatment options and why they occur.", "slug": "lung-cancer-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "lung-cancer", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/lung-cancer", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/lung-cancer", "kind": "Topic", "slug": "lung-cancer"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/nose-sinus-upper-respiratory/", "id": "nose-sinus-upper-respiratory", "hide": false, "title": "Nose, sinus, and upper respiratory conditions", "child_data": [{"kind": "Video", "id": "x6c0e0dd2"}, {"kind": "Video", "id": "xedfc9f96"}, {"kind": "Video", "id": "x3aa4a901"}, {"kind": "Video", "id": "xd906e722"}, {"kind": "Video", "id": "x6aae64b2"}, {"kind": "Video", "id": "xa2243b1a"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/nose-sinus-upper-respiratory/what-is-a-uri/", "id": "GoRhRJXp0j8", "title": "What is an upper respiratory infection (URI)?", "kind": "Video", "slug": "what-is-a-uri"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/nose-sinus-upper-respiratory/what-is-allergic-rhinitis/", "id": "RFC3RP2jvxE", "title": "What is allergic rhinitis?", "kind": "Video", "slug": "what-is-allergic-rhinitis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/nose-sinus-upper-respiratory/allergic-rhinitis-diagnosis-and-treatment/", "id": "Sh9uYq05zPk", "title": "Allergic rhinitis diagnosis and treatment", "kind": "Video", "slug": "allergic-rhinitis-diagnosis-and-treatment"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/nose-sinus-upper-respiratory/nasal-polyps/", "id": "QmEwoBLCqZY", "title": "Nasal polyps", "kind": "Video", "slug": "nasal-polyps"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/nose-sinus-upper-respiratory/what-is-sinusitis/", "id": "RywHs4kKxjA", "title": "What is sinusitis?", "kind": "Video", "slug": "what-is-sinusitis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/nose-sinus-upper-respiratory/sinusitis-diagnosis-and-treatment/", "id": "DGRnSnPSOqg", "title": "Sinusitis diagnosis and treatment", "kind": "Video", "slug": "sinusitis-diagnosis-and-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "nose-sinus-upper-respiratory", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/nose-sinus-upper-respiratory", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/nose-sinus-upper-respiratory", "kind": "Topic", "slug": "nose-sinus-upper-respiratory"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/throat-conditions/", "id": "throat-conditions", "hide": false, "title": "Throat conditions", "child_data": [{"kind": "Video", "id": "x37fc9527"}, {"kind": "Video", "id": "x6816e15a"}, {"kind": "Video", "id": "xcc3f4633"}, {"kind": "Video", "id": "x4f9280df"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/throat-conditions/tonsillitis/", "id": "_DNM039pUXE", "title": "Tonsillitis", "kind": "Video", "slug": "tonsillitis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/throat-conditions/pharyngitis/", "id": "v6-Ijv3wOAM", "title": "Pharyngitis", "kind": "Video", "slug": "pharyngitis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/throat-conditions/tonsillopharyngitis-complications-diagnosis-and-treatment/", "id": "EHEecXYsJ9w", "title": "Tonsillopharyngitis - Complications, diagnosis, and treatment", "kind": "Video", "slug": "tonsillopharyngitis-complications-diagnosis-and-treatment"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/throat-conditions/what-is-a-tonsillectomy/", "id": "fzF2AgL35qE", "title": "What is a tonsillectomy?", "kind": "Video", "slug": "what-is-a-tonsillectomy"}], "in_knowledge_map": false, "description": "", "node_slug": "throat-conditions", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/throat-conditions", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/throat-conditions", "kind": "Topic", "slug": "throat-conditions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/laryngeal-conditions/", "id": "laryngeal-conditions", "hide": false, "title": "Laryngeal conditions", "child_data": [{"kind": "Video", "id": "xbeec702c"}, {"kind": "Video", "id": "xc7637767"}, {"kind": "Video", "id": "xad6b576a"}, {"kind": "Video", "id": "x00e7bc89"}, {"kind": "Video", "id": "x4365a3b3"}, {"kind": "Video", "id": "x17410a65"}, {"kind": "Video", "id": "xa49e36fa"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/laryngeal-conditions/what-is-epiglottitis/", "id": "Tz-9z064euU", "title": "What is epiglottitis?", "kind": "Video", "slug": "what-is-epiglottitis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/laryngeal-conditions/epiglottitis-diagnosis-and-treatment/", "id": "_Md5nli5OII", "title": "Epiglottitis diagnosis and treatment", "kind": "Video", "slug": "epiglottitis-diagnosis-and-treatment"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/laryngeal-conditions/hib-vaccine/", "id": "TDQAd2N2Cls", "title": "Hib vaccine", "kind": "Video", "slug": "hib-vaccine"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/laryngeal-conditions/what-is-laryngitis/", "id": "puqe3_HkDZA", "title": "What is laryngitis ?", "kind": "Video", "slug": "what-is-laryngitis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/laryngeal-conditions/laryngitis-diagnosis-treatment-and-prevention/", "id": "M-9t4RrhKJE", "title": "Laryngitis diagnosis, treatment, and prevention", "kind": "Video", "slug": "laryngitis-diagnosis-treatment-and-prevention"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/laryngeal-conditions/laryngomalacia/", "id": "kOTdVMM9Lwg", "title": "Laryngomalacia", "kind": "Video", "slug": "laryngomalacia"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/laryngeal-conditions/vocal-cord-growths/", "id": "t1-VVUmP0rY", "title": "Vocal cord growths", "kind": "Video", "slug": "vocal-cord-growths"}], "in_knowledge_map": false, "description": "", "node_slug": "laryngeal-conditions", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/laryngeal-conditions", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/laryngeal-conditions", "kind": "Topic", "slug": "laryngeal-conditions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/respiratory-system-diseases/bronchiolitis/", "id": "bronchiolitis", "hide": false, "title": "Bronchiolitis", "child_data": [{"kind": "Video", "id": "x4db9007c"}, {"kind": "Video", "id": "x9bb435b9"}, {"kind": "Video", "id": "xbdc2d0e0"}, {"kind": "Video", "id": "x05186a89"}], "children": [{"path": "khan/science/health-and-medicine/respiratory-system-diseases/bronchiolitis/what-is-bronchiolitis/", "id": "65y1SKgRtOc", "title": "What is bronchiolitis?", "kind": "Video", "slug": "what-is-bronchiolitis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/bronchiolitis/bronchiolitis-pathophysiology/", "id": "9EZuhlSNUv0", "title": "Bronchiolitis pathophysiology", "kind": "Video", "slug": "bronchiolitis-pathophysiology"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/bronchiolitis/bronchiolitis-diagnosis/", "id": "mObmS7E75t8", "title": "Bronchiolitis diagnosis", "kind": "Video", "slug": "bronchiolitis-diagnosis"}, {"path": "khan/science/health-and-medicine/respiratory-system-diseases/bronchiolitis/bronchiolitis-treatment/", "id": "qjhlt6G-Azo", "title": "Bronchiolitis treatment", "kind": "Video", "slug": "bronchiolitis-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "bronchiolitis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases/bronchiolitis", "extended_slug": "science/health-and-medicine/respiratory-system-diseases/bronchiolitis", "kind": "Topic", "slug": "bronchiolitis"}], "in_knowledge_map": false, "description": "Our lungs are composed of a bronchial tree (think of an upside down tree with millions of leaves), blood vessels bringing blood in and out, and a protein-rich fluid that forms a matrix holding everything together! If any part of this well-balanced organ isn\u2019t working properly, a person can be left feeling short of breath. The lungs are also exposed to the outside environment, making them prone to infections. To counter infections, the lungs are lined with cells that have tiny protein bristles which wave back and forth and can literally sweep away dangerous bacteria. Learn more about diseases of the lungs and how modern medicine helps to keep them healthy!", "node_slug": "respiratory-system-diseases", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/respiratory-system-diseases", "extended_slug": "science/health-and-medicine/respiratory-system-diseases", "kind": "Topic", "slug": "respiratory-system-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/hematologic-system/", "id": "hematologic system", "hide": false, "title": "Advanced hematologic system physiology", "child_data": [{"kind": "Topic", "id": "xa3b63994"}, {"kind": "Topic", "id": "x3b7175fd"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/", "id": "Hematologic-system-introduction", "hide": false, "title": "Hematologic system introduction", "child_data": [{"kind": "Video", "id": "1228258123"}, {"kind": "Video", "id": "23988"}, {"kind": "Video", "id": "x20edc5f4"}, {"kind": "Video", "id": "xcf8c6f8f"}, {"kind": "Video", "id": "xf7e04c5d"}, {"kind": "Video", "id": "23992"}, {"kind": "Video", "id": "1228218407"}, {"kind": "Video", "id": "1228367762"}, {"kind": "Video", "id": "1228242255"}, {"kind": "Video", "id": "x5780b274"}, {"kind": "Video", "id": "x6000b8a4"}, {"kind": "Video", "id": "1228432957"}], "children": [{"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/what-s-inside-of-blood/", "id": "5MOn8X-tyFw", "title": "What's inside of blood?", "kind": "Video", "description": "Spin down your blood and find out what it's made up of. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-s-inside-of-blood"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/red-blood-cells/", "id": "fLKOBQ6cZHA", "title": "Red blood cells", "kind": "Video", "description": "Oxygen uptake by hemoglobin in red blood cells", "slug": "red-blood-cells"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/blood-types/", "id": "Nnqp_3HMlDU", "title": "Blood types", "kind": "Video", "slug": "blood-types"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/rn-blood-cell-lineages/", "id": "97nFwkRiNCc", "title": "Blood cell lineages", "kind": "Video", "slug": "rn-blood-cell-lineages"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/the-life-and-times-of-rbcs-and-platelets/", "id": "UBlem4dGLGU", "title": "Life and times of RBCs and platelets", "kind": "Video", "slug": "the-life-and-times-of-rbcs-and-platelets"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/hemoglobin/", "id": "LWtXthfG9_M", "title": "Hemoglobin", "kind": "Video", "description": "Hemoglobin and its role in the circulatory system", "slug": "hemoglobin"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/hemoglobin-moves-o2-and-co2/", "id": "QP8ImP6NCk8", "title": "Hemoglobin moves O2 and CO2", "kind": "Video", "description": "Learn the two ways that oxygen moves from the lungs to the tissues, and the three ways that carbon dioxide returns from the tissues to the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "hemoglobin-moves-o2-and-co2"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/fetal-hemoglobin-and-hematocrit/", "id": "SqE5S1qS7ZU", "title": "Fetal hemoglobin and hematocrit", "kind": "Video", "description": "Although mom controls the oxygen source, the fetus has a couple of clever tricks to get the most oxygen possible! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "fetal-hemoglobin-and-hematocrit"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/oxygen-content/", "id": "a19T5CX2b-g", "title": "Oxygen content", "kind": "Video", "description": "Learn how oxygen content (CaO2) is related to Hemoglobin concentration (Hb), oxygen saturation (SaO2), and the partial pressure of oxygen (PaO2). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "oxygen-content"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/how-do-we-make-blood-clots/", "id": "RQpBj8ebbNY", "title": "How do we make blood clots?", "kind": "Video", "slug": "how-do-we-make-blood-clots"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/coagulation-cascade/", "id": "FNVvQ788wzk", "title": "Coagulation cascade", "kind": "Video", "slug": "coagulation-cascade"}, {"path": "khan/science/health-and-medicine/hematologic-system/hematologic-system-introduction/bohr-effect-vs-haldane-effect/", "id": "dHi9ctwDUnc", "title": "Bohr effect vs. Haldane effect", "kind": "Video", "description": "Take a close look at how some friendly competition for Hemoglobin allows the body to more efficiently move oxygen and carbon Dioxide around. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "bohr-effect-vs-haldane-effect"}], "in_knowledge_map": false, "description": "Roughly 5 L of blood fill your arteries, veins, capillaries, and venules. What\u2019s it good for you ask? It carries oxygen to help your cells carry out respiration in addition to a number of other substances like lipids and hormones throughout the body. In cases of blood loss, such as trauma situations, the physician must be wary of the different blood types. We will explore the intricacies of the hematologic system here.", "node_slug": "Hematologic-system-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/hematologic system/Hematologic-system-introduction", "extended_slug": "science/health-and-medicine/hematologic system/Hematologic-system-introduction", "kind": "Topic", "slug": "hematologic-system-introduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/hematologic-system/bleeding-and-impaired-hemostasis/", "id": "bleeding-and-impaired-hemostasis", "hide": false, "title": "Bleeding and impaired hemostasis", "child_data": [{"kind": "Video", "id": "x8e7d1133"}, {"kind": "Video", "id": "x558fa32f"}, {"kind": "Video", "id": "x2d1ae7b8"}, {"kind": "Video", "id": "xcb4849fe"}], "children": [{"path": "khan/science/health-and-medicine/hematologic-system/bleeding-and-impaired-hemostasis/introduction-to-hemostasis/", "id": "rLIEeUP_e-Y", "title": "Hemostasis", "kind": "Video", "description": "Hemostasis is the process which stops bleeding after an injury. Blood vessels are repaired by the creation of a platelet plug during primary hemostasis, and the platelet plug is further reinforced by the conversion of fibrin to fibrinogen during secondary hemostasis.", "slug": "introduction-to-hemostasis"}, {"path": "khan/science/health-and-medicine/hematologic-system/bleeding-and-impaired-hemostasis/primary-hemostasis/", "id": "SffnpNxGWb8", "title": "Primary hemostasis", "kind": "Video", "description": "During primary hemostasis, a platelet plug is formed to rapidly stop the initial bleeding after injury. Learn about the different steps involved in primary hemostasis: vasoconstriction, platelet adhesion, activation and degranulation, platelet aggregation.", "slug": "primary-hemostasis"}, {"path": "khan/science/health-and-medicine/hematologic-system/bleeding-and-impaired-hemostasis/secondary-hemostasis/", "id": "y0sk8LG4mWQ", "title": "Secondary hemostasis", "kind": "Video", "description": "Secondary hemostasis is the process where the platelet plug initially created in primary hemostasis is reinforced by the conversion of fibrinogen to fibrin.", "slug": "secondary-hemostasis"}, {"path": "khan/science/health-and-medicine/hematologic-system/bleeding-and-impaired-hemostasis/anticoagulation/", "id": "VxEIsPOdOLw", "title": "Anticoagulation and thrombolysis", "kind": "Video", "description": "Anticoagulation is the process that prevents clots from forming. Thrombolysis is the process of breaking down clots after they\u2019ve been formed. Learn how the antithrombin III interacts with heparin-like molecules and how plasmin breaks down fibrin.", "slug": "anticoagulation"}], "in_knowledge_map": false, "description": "", "node_slug": "bleeding-and-impaired-hemostasis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/hematologic system/bleeding-and-impaired-hemostasis", "extended_slug": "science/health-and-medicine/hematologic system/bleeding-and-impaired-hemostasis", "kind": "Topic", "slug": "bleeding-and-impaired-hemostasis"}], "in_knowledge_map": false, "description": "It takes between 30 seconds to a minute for your blood to travel from your heart, to your body, and back to the heart again - perhaps a bit longer if the trip is out to your big toe! Our blood is incredibly important for transporting oxygen throughout the body. Hemoglobin, the protein that fills our blood cells, has wonderful mechanisms to allow it to bind to both oxygen and carbon dioxide. This is important for effective and quick transport of the gases around our body. Our blood is about 45% cells and 55% plasma, so the old adage \u201cblood is thicker than water\u201d quite literally holds true in scientific terms! Learn more about how this amazing system works in the following videos.", "node_slug": "hematologic system", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/hematologic system", "extended_slug": "science/health-and-medicine/hematologic system", "kind": "Topic", "slug": "hematologic-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/hematologic-system-diseases/", "id": "hematologic system diseases", "hide": false, "title": "Hematologic system diseases", "child_data": [{"kind": "Topic", "id": "xcd5283d5"}, {"kind": "Topic", "id": "xf8553230"}, {"kind": "Topic", "id": "x39d21749"}, {"kind": "Topic", "id": "xd18645fe"}, {"kind": "Topic", "id": "xeda6e20a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/hematologic-system-diseases/anemia/", "id": "anemia", "hide": false, "title": "Anemia", "child_data": [{"kind": "Article", "id": "x4a357b80"}, {"kind": "Video", "id": "xc4fcb753"}, {"kind": "Video", "id": "x2d20386e"}, {"kind": "Video", "id": "xe5403c9d"}], "children": [{"path": "khan/science/health-and-medicine/hematologic-system-diseases/anemia/rn-anemia/", "id": "Ty6TfxCYPQI", "title": "What is anemia?", "kind": "Video", "slug": "rn-anemia"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/anemia/rn-anemia-pathophysiology/", "id": "LtlodYLm8fc", "title": "Anemia pathophysiology", "kind": "Video", "slug": "rn-anemia-pathophysiology"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/anemia/rn-microcytic-normocytic-macrocytic-anemias/", "id": "3AMENlm4pOw", "title": "Microcytic, normocytic, and macrocytic anemias", "kind": "Video", "slug": "rn-microcytic-normocytic-macrocytic-anemias"}], "in_knowledge_map": false, "description": "", "node_slug": "anemia", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/hematologic system diseases/anemia", "extended_slug": "science/health-and-medicine/hematologic system diseases/anemia", "kind": "Topic", "slug": "anemia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/hematologic-system-diseases/leukemia/", "id": "leukemia", "hide": false, "title": "Leukemia", "child_data": [{"kind": "Video", "id": "xb7a9aa5b"}, {"kind": "Video", "id": "x301360c2"}, {"kind": "Video", "id": "x3ea29b42"}, {"kind": "Video", "id": "xaff601c9"}, {"kind": "Video", "id": "x6817687e"}, {"kind": "Video", "id": "x18ac2227"}, {"kind": "Video", "id": "x82136b61"}, {"kind": "Video", "id": "xa78c8eb4"}, {"kind": "Video", "id": "x200f6c35"}], "children": [{"path": "khan/science/health-and-medicine/hematologic-system-diseases/leukemia/hematopoiesis/", "id": "XVWOlKdpF_I", "title": "Hematopoiesis", "kind": "Video", "description": "Hematopoiesis is the process of creating new blood cells in the body. All blood cells start off as hematopoietic stem cells, and then specialize (differentiate) into myeloid cells (erythrocytes, megakaryocytes, monocytes, neutrophils, basophils, or eosinophils) or lymphoid cells (T-lymphocytes and B-lymphocytes).", "slug": "hematopoiesis"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/leukemia/what-is-leukemia/", "id": "IB3iJUuxt1c", "title": "What is leukemia?", "kind": "Video", "description": "Leukemia is a collection of cancers which create a large amount of immature blood cells. These immature blood cells take up space in the bone marrow, preventing the bone marrow from making healthy blood cells such as platelets, red blood cells, and white blood cells. Learn about the symptoms of this disease which include prolonged bleeding, frequent infections, and bone pain.", "slug": "what-is-leukemia"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/leukemia/leukemia-pathophysiology/", "id": "e1XCEJUqOQE", "title": "Leukemia pathophysiology", "kind": "Video", "description": "Sometimes an immature blast cell have two gene mutations which prevent it from maturing into a specialized blood cell and cause it to multiply out of control. These immature blast cells crowd the bone marrow and impair the ability of the bones to make healthy blood cells. This leads to a decrease in platelets, red blood cells (RBCs) and white blood cells (WBCs).", "slug": "leukemia-pathophysiology"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/leukemia/leukemia-diagnosis/", "id": "hTzI6x4fmGI", "title": "Leukemia diagnosis", "kind": "Video", "description": "Often health care professionals conduct a variety of blood tests to determine if someone has leukemia. Leukemia patients often have decreased levels of platelets, white blood cells (WBCs), red blood cells (RBCs), hematocrit, and hemoglobin. Other tests such as bone marrow aspirations can reveal an increase in immature blast cells. Learn how health professionals classify leukemia by staining sample tissue with a dye and by looking for chromosome translocation.", "slug": "leukemia-diagnosis"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/leukemia/leukemia-classifications/", "id": "frUCL0snbPk", "title": "Leukemia classifications", "kind": "Video", "description": "Learn how leukemia can be classified as an acute or chronic and myeloid or lymphoid disease.", "slug": "leukemia-classifications"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/leukemia/acute-leukemias/", "id": "lCRePFf4zNs", "title": "Acute leukemia", "kind": "Video", "description": "Acute leukemias affect specialized blood cells at the most immature stage in their growth. Acute lymphoblastic leukemias (ALL) are the most common cancer in children and is often associated with people who have down syndrome. Learn about B-cell ALL and T-cell ALL, as well as the different acute myeloid leukemias.", "slug": "acute-leukemias"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/leukemia/chronic-leukemia/", "id": "5u2pDR634Fw", "title": "Chronic leukemia", "kind": "Video", "description": "Chronic leukemias affect specialized blood cells that are partially through the process of maturation. Chronic lymphoblastic leukemias (CLL) often cause an enlargement of the liver and spleen. Involvement of the lymph nodes in CLL is often called small lymphocytic lymphoma. Learn how small lymphocytic lymphoma can transition to diffuse B cell lymphoma.", "slug": "chronic-leukemia"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/leukemia/myelodysplastic-syndrome/", "id": "7j6HcztlLdw", "title": "Myelodysplastic syndrome", "kind": "Video", "description": "Myelodysplastic syndrome is sometimes referred to as \u201cpre-leukemia\u201d or a condition that occurs before leukemia (although most patients will never develop leukemia). In myelodysplastic syndrome, the gene mutation preventing the maturation of the blast cell is present, however the second gene mutation leading to uncontrolled cell replication is absent. Learn how health professionals look at blood test results and bone marrow aspirates to diagnosis this disease.", "slug": "myelodysplastic-syndrome"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/leukemia/treatment-of-leukemia/", "id": "hH9AETxy6QI", "title": "Leukemia treatment", "kind": "Video", "description": "There are three main solutions to treat leukemia. Chemotherapy is a collection of drugs which target cells that rapidly multiply (a key characteristic in cancer). Radiation is often used on patients who are at a high risk of the leukemia entering the brain. For resistant leukemias, bone marrow transplantation is considered.", "slug": "treatment-of-leukemia"}], "in_knowledge_map": false, "description": "", "node_slug": "leukemia", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/hematologic system diseases/leukemia", "extended_slug": "science/health-and-medicine/hematologic system diseases/leukemia", "kind": "Topic", "slug": "leukemia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/hematologic-system-diseases/iron-deficiency-anemia-and-anemia-of-chronic-disease/", "id": "iron-deficiency-anemia-and-anemia-of-chronic-disease", "hide": false, "title": "Iron deficiency anemia and anemia of chronic disease", "child_data": [{"kind": "Video", "id": "x16e2a2c6"}, {"kind": "Video", "id": "xad6df5ea"}, {"kind": "Video", "id": "x492c99e0"}, {"kind": "Video", "id": "x97673226"}, {"kind": "Video", "id": "xc1bce465"}, {"kind": "Video", "id": "x395f8547"}], "children": [{"path": "khan/science/health-and-medicine/hematologic-system-diseases/iron-deficiency-anemia-and-anemia-of-chronic-disease/what-is-iron-deficiency/", "id": "U1Ls9Vh-3m8", "title": "What is iron deficiency?", "kind": "Video", "slug": "what-is-iron-deficiency"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/iron-deficiency-anemia-and-anemia-of-chronic-disease/microcytic-anemia/", "id": "4_410pxikS0", "title": "Microcytic anemia", "kind": "Video", "slug": "microcytic-anemia"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/iron-deficiency-anemia-and-anemia-of-chronic-disease/iron-deficency-anemia-diagnosis/", "id": "2duGAcN0nqw", "title": "Iron deficency anemia diagnosis", "kind": "Video", "slug": "iron-deficency-anemia-diagnosis"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/iron-deficiency-anemia-and-anemia-of-chronic-disease/anemia-of-chronic-disease/", "id": "EkFUb3L040E", "title": "Anemia of chronic disease", "kind": "Video", "slug": "anemia-of-chronic-disease"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/iron-deficiency-anemia-and-anemia-of-chronic-disease/chronic-disease-vs-iron-deficiency-anemia/", "id": "tVNRn4srPUI", "title": "Chronic disease vs iron deficiency anemia", "kind": "Video", "slug": "chronic-disease-vs-iron-deficiency-anemia"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/iron-deficiency-anemia-and-anemia-of-chronic-disease/iron-deficiency-and-anemia-of-chronic-disease-treatment/", "id": "X3QUqRd18jc", "title": "Iron deficiency and anemia of chronic disease treatment", "kind": "Video", "slug": "iron-deficiency-and-anemia-of-chronic-disease-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "iron-deficiency-anemia-and-anemia-of-chronic-disease", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/hematologic system diseases/iron-deficiency-anemia-and-anemia-of-chronic-disease", "extended_slug": "science/health-and-medicine/hematologic system diseases/iron-deficiency-anemia-and-anemia-of-chronic-disease", "kind": "Topic", "slug": "iron-deficiency-anemia-and-anemia-of-chronic-disease"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/hematologic-system-diseases/plasma-cell-dyscrasias/", "id": "plasma-cell-dyscrasias", "hide": false, "title": "Plasma cell dyscrasias", "child_data": [{"kind": "Video", "id": "x2a45f7ca"}, {"kind": "Video", "id": "x04ad24c2"}, {"kind": "Video", "id": "xbdb0c7ab"}, {"kind": "Video", "id": "xce97ca61"}], "children": [{"path": "khan/science/health-and-medicine/hematologic-system-diseases/plasma-cell-dyscrasias/what-are-plasma-cell-dyscrasias/", "id": "t3MxJEbJN3k", "title": "What are plasma cell dyscrasias?", "kind": "Video", "slug": "what-are-plasma-cell-dyscrasias"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/plasma-cell-dyscrasias/what-is-monoclonal-gammopathy-of-undetermined-significance-mgus/", "id": "K25N7ZfSaO0", "title": "What is Monoclonal gammopathy of undetermined significance (MGUS)?", "kind": "Video", "slug": "what-is-monoclonal-gammopathy-of-undetermined-significance-mgus"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/plasma-cell-dyscrasias/what-is-multiple-myeloma/", "id": "jdytgW5wKa4", "title": "What is multiple myeloma?", "kind": "Video", "slug": "what-is-multiple-myeloma"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/plasma-cell-dyscrasias/what-is-waldenstrom-macroglobulinemia/", "id": "Hod_JfGJPj4", "title": "What is waldenstrom macroglobulinemia?", "kind": "Video", "slug": "what-is-waldenstrom-macroglobulinemia"}], "in_knowledge_map": false, "description": "", "node_slug": "plasma-cell-dyscrasias", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/hematologic system diseases/plasma-cell-dyscrasias", "extended_slug": "science/health-and-medicine/hematologic system diseases/plasma-cell-dyscrasias", "kind": "Topic", "slug": "plasma-cell-dyscrasias"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/hematologic-system-diseases/myeloproliferative-disorders/", "id": "myeloproliferative-disorders", "hide": false, "title": "Myeloproliferative disorders", "child_data": [{"kind": "Video", "id": "x5aa31ada"}, {"kind": "Video", "id": "xc27514f7"}, {"kind": "Video", "id": "xa5808cfb"}, {"kind": "Video", "id": "x93f538b1"}, {"kind": "Video", "id": "x5ac104fb"}], "children": [{"path": "khan/science/health-and-medicine/hematologic-system-diseases/myeloproliferative-disorders/what-are-myeloproliferative-disorders/", "id": "eLsegxXzaiE", "title": "What are myeloproliferative disorders?", "kind": "Video", "description": "Learn about 4 different cancers that involve the bone marrow and produce a large number of cells in the blood stream. By Raja Narayan.\n\nVisit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-are-myeloproliferative-disorders"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/myeloproliferative-disorders/what-is-polycythemia-vera/", "id": "vOPuAPCioE4", "title": "What is polycythemia vera?", "kind": "Video", "description": "Learn to recognize the symptoms of polycythemia vera as well as how to diagnosis and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-polycythemia-vera"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/myeloproliferative-disorders/what-is-essential-thrombocythemia/", "id": "1POB_czE16k", "title": "What is essential thrombocythemia?", "kind": "Video", "description": "Learn what is essential thrombocythemia as well as how to identify its signs and symptoms, diagnose it, and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-essential-thrombocythemia"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/myeloproliferative-disorders/what-is-chronic-myelogenous-leukemia/", "id": "ST6mSB-RvE0", "title": "What is chronic myelogenous leukemia?", "kind": "Video", "description": "Learn what is chronic myelogenous leukemia as well as how to identify its signs and symptoms, diagnose it, and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-chronic-myelogenous-leukemia"}, {"path": "khan/science/health-and-medicine/hematologic-system-diseases/myeloproliferative-disorders/what-is-primary-myelofibrosis/", "id": "-YEtWOxweRg", "title": "What is primary myelofibrosis?", "kind": "Video", "description": "Learn what is primary myelofibrosis as well as how to identify its signs and symptoms, diagnose it, and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-primary-myelofibrosis"}], "in_knowledge_map": false, "description": "", "node_slug": "myeloproliferative-disorders", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/hematologic system diseases/myeloproliferative-disorders", "extended_slug": "science/health-and-medicine/hematologic system diseases/myeloproliferative-disorders", "kind": "Topic", "slug": "myeloproliferative-disorders"}], "in_knowledge_map": false, "description": "Blood is incredibly important in combating disease and the healing process after an injury. It acts as a highway for medicine, stops bleeding, fights infections, controls cells from multiplying too fast, and so much more. But things can go wrong with blood too! What if your blood couldn\u2019t clot and stop you from bleeding, or started to clot uncontrollably? What if your red blood cells or white blood cells suddenly disappeared? Blood contains many different types of tissues doing very different jobs, making diseases of the blood produce a variety of symptoms, including continuously feeling tired and bone pain. Learn about the different blood diseases, how they are diagnosed, and the cool ways health professionals treat these conditions.", "node_slug": "hematologic system diseases", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/hematologic system diseases", "extended_slug": "science/health-and-medicine/hematologic system diseases", "kind": "Topic", "slug": "hematologic-system-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/endocrine-system/", "id": "endocrine system", "hide": false, "title": "Advanced endocrine system physiology", "child_data": [{"kind": "Topic", "id": "x4afc6b1f"}, {"kind": "Topic", "id": "xd97b6348"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/endocrine-system/endocrine-system-introduction/", "id": "Endocrine-system-introduction ", "hide": false, "title": "Endocrine system introduction", "child_data": [{"kind": "Video", "id": "xaf2ad25b"}, {"kind": "Video", "id": "x26e9c294"}, {"kind": "Video", "id": "xcdd0a401"}, {"kind": "Video", "id": "x9ff1d77e"}, {"kind": "Video", "id": "xd4489fab"}], "children": [{"path": "khan/science/health-and-medicine/endocrine-system/endocrine-system-introduction/endocrine-gland-hormone-review/", "id": "ER49EweKwW8", "title": "Endocrine gland hormone review", "kind": "Video", "description": "Welcome to the Endocrine System. Get ready to learn about one of the most important ways that our body parts communicate! By Ryan Patton.", "slug": "endocrine-gland-hormone-review"}, {"path": "khan/science/health-and-medicine/endocrine-system/endocrine-system-introduction/hypothalamus-and-pituitary-gland/", "id": "9dS7bc_2bUE", "title": "The hypothalamus and pituitary gland", "kind": "Video", "description": "What makes the endocrine organs tick? Find out in this video about the hypothalamus and pituitary glands! \u00a0By Ryan Patton.", "slug": "hypothalamus-and-pituitary-gland"}, {"path": "khan/science/health-and-medicine/endocrine-system/endocrine-system-introduction/hormone-concentration-metabolism-negative-feedback/", "id": "RycF0ub2Al0", "title": "Hormone concentration metabolism and negative feedback", "kind": "Video", "description": "In this video we're going to learn about how the concentration of hormones in our blood is regulated. By Ryan Patton.", "slug": "hormone-concentration-metabolism-negative-feedback"}, {"path": "khan/science/health-and-medicine/endocrine-system/endocrine-system-introduction/types-of-hormones/", "id": "KSclrkk_Ako", "title": "Types of hormones", "kind": "Video", "description": "There are three major types of hormones, based on structure, in our body. Lets find out a little more about them. By Ryan Patton.", "slug": "types-of-hormones"}, {"path": "khan/science/health-and-medicine/endocrine-system/endocrine-system-introduction/cellular-mechanism-hormone-action/", "id": "TNGSzt2v4xY", "title": "Cellular mechanism of hormone action", "kind": "Video", "description": "Learn about the interaction between chemical messages and their target cells in this video about hormone action. By Ryan Patton.", "slug": "cellular-mechanism-hormone-action"}], "in_knowledge_map": false, "description": "Glands are special organs that secrete chemical messages called hormones, which seep into the blood - it\u2019s like putting a tea bag in hot water. As the heart pumps, this blood carries these chemical messages throughout the body, allowing the hormones to interact with specific target cells and organs. Endocrine glands help us to maintain our appetites, grow up, metabolize molecules, concentrate urine,- and oh, so much more! We will examine how these variegated hormones play a role in homeostasis as the body responds to a changing environment.", "node_slug": "Endocrine-system-introduction ", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/endocrine system/Endocrine-system-introduction ", "extended_slug": "science/health-and-medicine/endocrine system/Endocrine-system-introduction ", "kind": "Topic", "slug": "endocrine-system-introduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/endocrine-system/biological-basis-of-behavior-endocrine-system-2014-03-27t180655890z/", "id": "biological-basis-of-behavior-endocrine-system-2014-03-27T18:06:55.890Z", "hide": false, "title": "Biological basis of behavior: Endocrine system", "child_data": [{"kind": "Video", "id": "x9f41189c"}, {"kind": "Video", "id": "xada599e1"}, {"kind": "Video", "id": "x6f7ced67"}, {"kind": "Video", "id": "xbb5f4355"}], "children": [{"path": "khan/science/health-and-medicine/endocrine-system/biological-basis-of-behavior-endocrine-system-2014-03-27t180655890z/terpenes-to-steroids1/", "id": "ywfxY9UDRo4", "title": "From terpenes to steroids part 1: Terpenes", "kind": "Video", "description": "Steroids have to come from somewhere, right? Let's learn about the carbon building blocks with which steroids are made. By Ryan Patton.", "slug": "terpenes-to-steroids1"}, {"path": "khan/science/health-and-medicine/endocrine-system/biological-basis-of-behavior-endocrine-system-2014-03-27t180655890z/terpenes-to-steroids2/", "id": "x9wyOYnot7E", "title": "From terpenes to steroids part 2: Squalene, cholesterol, and steroids", "kind": "Video", "description": "After learning about terpenes, lets see how are body uses them to eventually make all the steroid hormones of our body. By Ryan Patton.", "slug": "terpenes-to-steroids2"}, {"path": "khan/science/health-and-medicine/endocrine-system/biological-basis-of-behavior-endocrine-system-2014-03-27t180655890z/endocrine-system-and-influence-on-behavior-part-1/", "id": "cQKPvT-aEqk", "title": "Endocrine system and influence on behavior - Part 1", "kind": "Video", "slug": "endocrine-system-and-influence-on-behavior-part-1"}, {"path": "khan/science/health-and-medicine/endocrine-system/biological-basis-of-behavior-endocrine-system-2014-03-27t180655890z/endocrine-system-and-influence-on-behavior-part-2/", "id": "2dZpQJSSSAs", "title": "Endocrine system and influence on behavior - Part 2", "kind": "Video", "slug": "endocrine-system-and-influence-on-behavior-part-2"}], "in_knowledge_map": false, "description": "Consider any behavior, sleeping for instance, and think about all of the organs that have to work together to have it go smoothly. The heart and lungs need to slow down, the brain needs to stop taking in the cues from the environment, and the bladder needs to wait until morning to empty. This coordinated effort is achieved by a number of unique hormones acting on different tissues. Learn more about how this process works and why it\u2019s so critical to our everyday lives!", "node_slug": "biological-basis-of-behavior-endocrine-system-2014-03-27T18:06:55.890Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/endocrine system/biological-basis-of-behavior-endocrine-system-2014-03-27T18:06:55.890Z", "extended_slug": "science/health-and-medicine/endocrine system/biological-basis-of-behavior-endocrine-system-2014-03-27T18:06:55.890Z", "kind": "Topic", "slug": "biological-basis-of-behavior-endocrine-system-2014-03-27t180655890z"}], "in_knowledge_map": false, "description": "When you\u2019re nervous before an important speech, or asking someone out on a date, you might feel butterflies in your stomach. This is actually the result of your endocrine system releasing hormones! You can\u2019t really point to any single organ as \u201cthe endocrine system\u201d, because it\u2019s actually a family of glands that secrete hormones into the body. Hormones seep into the blood (imagine putting a tea bag into hot water), and as the blood flows around the body, it carries with it these important hormone molecules that interact with specific target cells and organs. This signaling system helps to keep the entire body well-balanced and on the same page.", "node_slug": "endocrine system", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/endocrine system", "extended_slug": "science/health-and-medicine/endocrine system", "kind": "Topic", "slug": "endocrine-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/endocrine-system-diseases/", "id": "endocrine-system-diseases", "hide": false, "title": "Endocrine system diseases", "child_data": [{"kind": "Topic", "id": "xdbe6b6b2"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/", "id": "diabetes", "hide": false, "title": "Diabetes", "child_data": [{"kind": "Article", "id": "xa0d71884"}, {"kind": "Video", "id": "x35df36cb"}, {"kind": "Video", "id": "x38e3fb6b"}, {"kind": "Video", "id": "xdea85e83"}, {"kind": "Video", "id": "x902f4eb6"}, {"kind": "Video", "id": "xb81fa1e3"}, {"kind": "Video", "id": "x5d757900"}, {"kind": "Video", "id": "x073cc344"}, {"kind": "Video", "id": "x0926aef3"}, {"kind": "Video", "id": "x428415f6"}, {"kind": "Video", "id": "xa97d83af"}, {"kind": "Video", "id": "xbb889919"}, {"kind": "Video", "id": "xd2e6c5c3"}, {"kind": "Video", "id": "xf7677f8c"}, {"kind": "Video", "id": "x2230b549"}], "children": [{"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/what-is-diabetes-mellitus/", "id": "ulxyWZf7BWc", "title": "What is diabetes mellitus?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-diabetes-mellitus"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/breaking-down-diabetes/", "id": "dpBA1lH39L8", "title": "Breaking down diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "breaking-down-diabetes"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/types-of-diabetes/", "id": "c9LwwQK5588", "title": "Types of diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "types-of-diabetes"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/pathophysiology-type-i-diabetes/", "id": "3B73j1tKkpI", "title": "Pathophysiology - Type I diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pathophysiology-type-i-diabetes"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/pathophysiology-type-ii-diabetes/", "id": "RlLrvnnTDDU", "title": "Pathophysiology - Type II diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pathophysiology-type-ii-diabetes"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/diagnosing-diabetes/", "id": "iUlYRyvQAIE", "title": "Diagnosing diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-diabetes"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/treating-type-i-diabetes/", "id": "ImZO2ytl9P4", "title": "Treating type I diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treating-type-i-diabetes"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/treating-type-ii-diabetes-pharmacology/", "id": "IMLVbEzM0DI", "title": "Treating type II diabetes - Pharmacology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treating-type-ii-diabetes-pharmacology"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/treating-type-ii-diabetes-a-practical-approach/", "id": "hFZPl_t2GLU", "title": "Treating type II diabetes - A practical approach", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treating-type-ii-diabetes-a-practical-approach"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/acute-complications-of-diabetes-diabetic-ketoacidosis/", "id": "tpjVmLIUWCo", "title": "Acute complications of diabetes - Diabetic ketoacidosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "acute-complications-of-diabetes-diabetic-ketoacidosis"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/acute-complications-of-diabetes-hyperosmolar-hyperglycemic-nonketotic-state/", "id": "iKKF5yuxvg8", "title": "Acute complications of diabetes - Hyperosmolar hyperglycemic nonketotic state", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "acute-complications-of-diabetes-hyperosmolar-hyperglycemic-nonketotic-state"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/diabetic-nephropathy-mechanisms/", "id": "F4Lt0AjMxEY", "title": "Diabetic nephropathy - Mechanisms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diabetic-nephropathy-mechanisms"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/diabetic-nephropathy-clinical-presentation-treatment/", "id": "Pr_-cUA_PY8", "title": "Diabetic nephropathy - Clinical presentation & treatment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diabetic-nephropathy-clinical-presentation-treatment"}, {"path": "khan/science/health-and-medicine/endocrine-system-diseases/diabetes/diabetic-retinopathy/", "id": "VIrkurR446s", "title": "Diabetic retinopathy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diabetic-retinopathy"}], "in_knowledge_map": false, "description": "", "node_slug": "diabetes", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/endocrine-system-diseases/diabetes", "extended_slug": "science/health-and-medicine/endocrine-system-diseases/diabetes", "kind": "Topic", "slug": "diabetes"}], "in_knowledge_map": false, "description": "", "node_slug": "endocrine-system-diseases", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/endocrine-system-diseases", "extended_slug": "science/health-and-medicine/endocrine-system-diseases", "kind": "Topic", "slug": "endocrine-system-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/", "id": "nervous-system-and-sensory-infor", "hide": false, "title": "Advanced nervous system physiology", "child_data": [{"kind": "Topic", "id": "x5403a9da"}, {"kind": "Topic", "id": "x88bdbbdd"}, {"kind": "Topic", "id": "xb00358b6"}, {"kind": "Topic", "id": "x0cef7c58"}, {"kind": "Topic", "id": "x5d2f742d"}, {"kind": "Topic", "id": "xc586e297"}, {"kind": "Topic", "id": "xa3569ca0"}, {"kind": "Topic", "id": "x8098f84a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/", "id": "Nervous-system-introduction", "hide": false, "title": "Nervous system introduction", "child_data": [{"kind": "Video", "id": "xcbff8238"}, {"kind": "Video", "id": "23994"}, {"kind": "Video", "id": "x34e8d04e"}, {"kind": "Video", "id": "x7a518014"}, {"kind": "Video", "id": "23996"}, {"kind": "Video", "id": "27192"}, {"kind": "Video", "id": "xbfcf48e2"}, {"kind": "Video", "id": "x45263500"}, {"kind": "Video", "id": "x078b055b"}, {"kind": "Video", "id": "24002"}, {"kind": "Video", "id": "x0adae408"}, {"kind": "Video", "id": "x87ddf0ff"}, {"kind": "Video", "id": "xc550a5c4"}, {"kind": "Video", "id": "x5b1e791e"}, {"kind": "Video", "id": "xa9b71784"}, {"kind": "Video", "id": "xa82be47f"}, {"kind": "Video", "id": "xedf571fd"}, {"kind": "Video", "id": "xb67fb1c0"}, {"kind": "Video", "id": "x4125f8d9"}, {"kind": "Video", "id": "xfef2f16a"}, {"kind": "Video", "id": "xff5c3e85"}], "children": [{"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/introduction-to-neural-cell-types/", "id": "L82bDTBMGUU", "title": "Introduction to neural cell types", "kind": "Video", "description": "This video provides an introduction to the cell types of the nervous system. By Matt Jensen.", "slug": "introduction-to-neural-cell-types"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/anatomy-of-a-neuron/", "id": "ob5U8zPbAX4", "title": "Anatomy of a neuron", "kind": "Video", "description": "Introduction to the neuron and its anatomy", "slug": "anatomy-of-a-neuron"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/overview-of-neuron-structure/", "id": "1h4kW8RX-6k", "title": "Overview of neuron structure", "kind": "Video", "description": "This video introduces the structure and structural types of neurons.\u00a0 By Matt Jensen.", "slug": "overview-of-neuron-structure"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/overview-of-neuron-function/", "id": "BY8DJeX_tGc", "title": "Overview of neuron function", "kind": "Video", "description": "This video introduces the function and functional types of neurons.\u00a0 By Matt Jensen.", "slug": "overview-of-neuron-function"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/sodium-potassium-pump/", "id": "C_H-ONQFjpQ", "title": "Sodium potassium pump", "kind": "Video", "description": "How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane", "slug": "sodium-potassium-pump"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/correction-to-sodium-and-potassium-pump-video/", "id": "ye3rTjLCvAU", "title": "Correction to sodium and potassium pump video", "kind": "Video", "description": "Correction to Sodium and Potassium Pump Video", "slug": "correction-to-sodium-and-potassium-pump-video"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/electrotonic-action-potential/", "id": "kY8FEq0teOs", "title": "Electrotonic and action potential", "kind": "Video", "slug": "electrotonic-action-potential"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/saltatory-conduction-neurons/", "id": "ikFUv-gdNLQ", "title": "Saltatory conduction in neurons", "kind": "Video", "slug": "saltatory-conduction-neurons"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/synapse-structure/", "id": "iqf3ft0mh1M", "title": "Synapse structure", "kind": "Video", "slug": "synapse-structure"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/neuronal-synapses-chemical/", "id": "Tbq-KZaXiL4", "title": "Neuronal synapses (chemical)", "kind": "Video", "description": "How one neuron can stimulate (or inhibit) another neuron at a chemical synapse", "slug": "neuronal-synapses-chemical"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/types-of-neurotransmitters/", "id": "FXYX_ksRwIk", "title": "Types of neurotransmitters", "kind": "Video", "slug": "types-of-neurotransmitters"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/types-of-neurotransmitter-receptors/", "id": "yg44T2HcA2o", "title": "Types of neurotransmitter receptors", "kind": "Video", "slug": "types-of-neurotransmitter-receptors"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/structure-of-the-nervous-system/", "id": "jmD0LBdAvlE", "title": "Structure of the nervous system", "kind": "Video", "slug": "structure-of-the-nervous-system"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/functions-of-the-nervous-system/", "id": "qrK-FBdjGk4", "title": "Functions of the nervous system", "kind": "Video", "slug": "functions-of-the-nervous-system"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/motor-unit/", "id": "vXb0ZvkFkS8", "title": "Motor unit", "kind": "Video", "slug": "motor-unit"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/peripheral-somatosensation/", "id": "oOIqk5hXBt4", "title": "Peripheral somatosensation", "kind": "Video", "slug": "peripheral-somatosensation"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/muscle-stretch-reflex/", "id": "Ya-3XHBWDqs", "title": "Muscle stretch reflex", "kind": "Video", "slug": "muscle-stretch-reflex"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/autonomic-nervous-system/", "id": "jA1NyCE4M2g", "title": "Autonomic nervous system", "kind": "Video", "slug": "autonomic-nervous-system"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/upper-motor-neurons/", "id": "aASSUcUSBro", "title": "Upper motor neurons", "kind": "Video", "slug": "upper-motor-neurons"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/somatosensory-tracts/", "id": "vrmKqH8d1RM", "title": "Somatosensory tracts", "kind": "Video", "slug": "somatosensory-tracts"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-system-introduction/cerebral-cortex/", "id": "mGxomKWfJXs", "title": "Cerebral cortex", "kind": "Video", "slug": "cerebral-cortex"}], "in_knowledge_map": false, "description": "", "node_slug": "Nervous-system-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/nervous-system-and-sensory-infor/Nervous-system-introduction", "extended_slug": "science/health-and-medicine/nervous-system-and-sensory-infor/Nervous-system-introduction", "kind": "Topic", "slug": "nervous-system-introduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters/", "id": "neural-cells-and-neurotransmitters", "hide": false, "title": "Neural cells and neurotransmitters", "child_data": [{"kind": "Video", "id": "xf45480de"}, {"kind": "Video", "id": "x305db132"}, {"kind": "Video", "id": "x3d2e6106"}, {"kind": "Video", "id": "x8c4fa549"}, {"kind": "Video", "id": "x5fc44899"}, {"kind": "Video", "id": "x57d1f66b"}, {"kind": "Video", "id": "x0d5e3691"}, {"kind": "Video", "id": "xbe97865f"}], "children": [{"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters/neurotransmitter-release/", "id": "Ac-Npt3vgCE", "title": "Neurotransmitter release", "kind": "Video", "slug": "neurotransmitter-release"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters/neurotransmitter-removal/", "id": "FO10z7FX13c", "title": "Neurotransmitter removal", "kind": "Video", "slug": "neurotransmitter-removal"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters/neuroplasticity/", "id": "J8wW1t1JqUc", "title": "Neuroplasticity", "kind": "Video", "slug": "neuroplasticity"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters/astrocytes/", "id": "rfepM3L7Pqc", "title": "Astrocytes", "kind": "Video", "description": "This video describes the structure and function of astrocytes. By Matt Jensen.", "slug": "astrocytes"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters/microglia/", "id": "mw-rwhpAQe4", "title": "Microglia", "kind": "Video", "description": "This video describes the structure and function of microglia.\u00a0 By Matt Jensen.", "slug": "microglia"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters/ependymal-cells/", "id": "PpvexFbd8e8", "title": "Ependymal cells", "kind": "Video", "description": "This video describes the structure and function of ependymal cells.\u00a0 By Matt Jensen.", "slug": "ependymal-cells"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters/oligodendrocytes/", "id": "jMXf2lgddOg", "title": "Oligodendrocytes", "kind": "Video", "description": "This video describes the structure and function of oligodendrocytes.\u00a0 By Matt Jensen.", "slug": "oligodendrocytes"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters/schwann-cells/", "id": "XmL7RHouyUo", "title": "Schwann cells", "kind": "Video", "description": "This video describes the structure and function of Schwann cells.\u00a0 By Matt Jensen.", "slug": "schwann-cells"}], "in_knowledge_map": false, "description": "Get an overview of the structure and function of neurons, and learn about the many other important cells needed to help our nervous system function optimally! By Matt Jensen.", "node_slug": "neural-cells-and-neurotransmitters", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters", "extended_slug": "science/health-and-medicine/nervous-system-and-sensory-infor/neural-cells-and-neurotransmitters", "kind": "Topic", "slug": "neural-cells-and-neurotransmitters"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27t175817207z/", "id": "neuron-membrane-potentials-2014-03-27T17:58:17.207Z", "hide": false, "title": "Neuron membrane potentials", "child_data": [{"kind": "Video", "id": "x1066c8b0"}, {"kind": "Video", "id": "x4bfcc978"}, {"kind": "Video", "id": "x5358cfa6"}, {"kind": "Video", "id": "x8404c066"}, {"kind": "Video", "id": "xf5a47394"}, {"kind": "Video", "id": "x62bebb4e"}, {"kind": "Video", "id": "x810b045c"}, {"kind": "Video", "id": "x2db717e3"}], "children": [{"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27t175817207z/neuron-resting-potential-description/", "id": "4htSVI5E9AQ", "title": "Neuron resting potential description", "kind": "Video", "slug": "neuron-resting-potential-description"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27t175817207z/neuron-resting-potential-mechanism/", "id": "l3ngsl7FhTc", "title": "Neuron resting potential mechanism", "kind": "Video", "slug": "neuron-resting-potential-mechanism"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27t175817207z/neuron-graded-potential-description/", "id": "AQr0rNyUnFM", "title": "Neuron graded potential description", "kind": "Video", "slug": "neuron-graded-potential-description"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27t175817207z/neuron-graded-potential-mechanism/", "id": "NaAwVrOEyss", "title": "Neuron graded potential mechanism", "kind": "Video", "slug": "neuron-graded-potential-mechanism"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27t175817207z/neuron-action-potential-description/", "id": "h2H6POZowiU", "title": "Neuron action potential description", "kind": "Video", "slug": "neuron-action-potential-description"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27t175817207z/neuron-action-potential-mechanism/", "id": "MZz4OUOyFvg", "title": "Neuron action potential mechanism", "kind": "Video", "slug": "neuron-action-potential-mechanism"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27t175817207z/effects-of-axon-diameter-and-myelination/", "id": "_Lj_F9GADa4", "title": "Effects of axon diameter and myelination", "kind": "Video", "slug": "effects-of-axon-diameter-and-myelination"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27t175817207z/action-potential-patterns/", "id": "jM-gvSqsP5A", "title": "Action potential patterns", "kind": "Video", "slug": "action-potential-patterns"}], "in_knowledge_map": false, "description": "Learn the causes and functions of neuron membrane potentials, including resting, graded, and action potentials.", "node_slug": "neuron-membrane-potentials-2014-03-27T17:58:17.207Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27T17:58:17.207Z", "extended_slug": "science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-2014-03-27T17:58:17.207Z", "kind": "Topic", "slug": "neuron-membrane-potentials-2014-03-27t175817207z"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27t184520451z/", "id": "sensory-perception-2014-03-27T18:45:20.451Z", "hide": false, "title": "Sensory perception", "child_data": [{"kind": "Video", "id": "x5a99dfd1"}, {"kind": "Video", "id": "x6e5730e4"}, {"kind": "Video", "id": "x514724cb"}, {"kind": "Video", "id": "xe595adb5"}, {"kind": "Video", "id": "x7dcb9bac"}, {"kind": "Video", "id": "x5029ccec"}, {"kind": "Video", "id": "x69d7084f"}, {"kind": "Video", "id": "x1d7a1b97"}], "children": [{"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27t184520451z/perceptual-organization/", "id": "PQyQadCqLAI", "title": "Visual cues", "kind": "Video", "slug": "perceptual-organization"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27t184520451z/sensory-adapting/", "id": "8shz0KfqkMo", "title": "Sensory adaptation", "kind": "Video", "slug": "sensory-adapting"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27t184520451z/webers-law-and-thresholds/", "id": "O_nY1TM2RZM", "title": "Weber's law and thresholds", "kind": "Video", "slug": "webers-law-and-thresholds"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27t184520451z/somatosensation-1/", "id": "FssCS9RhFt0", "title": "Somatosensation", "kind": "Video", "description": "Explore our ability to sense the environment through our body. \u00a0By Ron.", "slug": "somatosensation-1"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27t184520451z/signal-detection-theory-part-1/", "id": "BHkw9_GWPJA", "title": "Signal detection theory - part 1", "kind": "Video", "slug": "signal-detection-theory-part-1"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27t184520451z/signal-detection-theory-part-2/", "id": "UHEiWws8t-g", "title": "Signal detection theory - part 2", "kind": "Video", "slug": "signal-detection-theory-part-2"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27t184520451z/bottom-up-versus-top-down-processing/", "id": "aJy5_p_LAhQ", "title": "Bottom-up vs. top-down processing", "kind": "Video", "slug": "bottom-up-versus-top-down-processing"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27t184520451z/gestalt-principles/", "id": "20N53khArXA", "title": "Gestalt principles", "kind": "Video", "slug": "gestalt-principles"}], "in_knowledge_map": false, "description": "Learn about how we perceive our various senses, including the theories, laws, and organizational principles that underly our ability to make sense of the world around us.", "node_slug": "sensory-perception-2014-03-27T18:45:20.451Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27T18:45:20.451Z", "extended_slug": "science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27T18:45:20.451Z", "kind": "Topic", "slug": "sensory-perception-2014-03-27t184520451z"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sight-2014-03-27t184534237z/", "id": "sight-2014-03-27T18:45:34.237Z", "hide": false, "title": "Sight (vision)", "child_data": [{"kind": "Video", "id": "x59ee3a84"}, {"kind": "Video", "id": "x9ad8d29e"}, {"kind": "Video", "id": "x37026cd3"}, {"kind": "Video", "id": "x0e9ec663"}, {"kind": "Video", "id": "x198511a9"}, {"kind": "Video", "id": "x9cf82bf8"}, {"kind": "Video", "id": "xf27124b4"}], "children": [{"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sight-2014-03-27t184534237z/vision-structure-of-the-eye/", "id": "nXgL7C7emDQ", "title": "The structure of the eye", "kind": "Video", "description": "In this video, I review the structure of the eye. By Ronald Sahyouni.", "slug": "vision-structure-of-the-eye"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sight-2014-03-27t184534237z/vision-summary/", "id": "3m-464MqBJY", "title": "Visual sensory information", "kind": "Video", "description": "In this video, I explore our sense of vision. By Ronald Sahyouni.", "slug": "vision-summary"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sight-2014-03-27t184534237z/phototransduction-cascade/", "id": "CqN-XIPhMpo", "title": "The phototransduction cascade", "kind": "Video", "description": "This explains phototransduction cascade which is critical to our sense of vision. By Ronald Sahyouni.", "slug": "phototransduction-cascade"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sight-2014-03-27t184534237z/photoreceptors-rods-cones/", "id": "_ElAuQyw4uA", "title": "Photoreceptors (rods vs cones)", "kind": "Video", "description": "In this video, I explore the similarities and differences between rods and cones. By Ronald Sahyouni.", "slug": "photoreceptors-rods-cones"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sight-2014-03-27t184534237z/photoreceptor-distribution-fovea/", "id": "UXIfzc1UH-g", "title": "Photoreceptor distribution in the fovea", "kind": "Video", "description": "In this video, I explore how photoreceptors (rods and cones) are distributed in the fovea. By Ronald Sahyouni.", "slug": "photoreceptor-distribution-fovea"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sight-2014-03-27t184534237z/visual-field-processing/", "id": "aobWzlXIooQ", "title": "Visual field processing", "kind": "Video", "description": "In this video, I review how we process our visual field, and how information from the right and left visual field is broken down and sent to the brain. By Ronald Sahyouni.", "slug": "visual-field-processing"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sight-2014-03-27t184534237z/feature-detection-and-parallel-processing/", "id": "0ugcw7wOZBg", "title": "Feature detection and parallel processing", "kind": "Video", "description": "In this video, I review our ability to break down an image into its component \"features\" such as color, form, and motion. This is known as feature detection, and since the detection of various features happens simultaneously, or in parallel, it is referred to as parallel processing.\u00a0 By Ronald Sahyouni.", "slug": "feature-detection-and-parallel-processing"}], "in_knowledge_map": false, "description": "Photons are hitting your eye as you read this! Learn about our sense of sight, including the cells responsible for converting light into a neural impulse, the structure of the eye, and how we break down images to make sense of them.", "node_slug": "sight-2014-03-27T18:45:34.237Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/nervous-system-and-sensory-infor/sight-2014-03-27T18:45:34.237Z", "extended_slug": "science/health-and-medicine/nervous-system-and-sensory-infor/sight-2014-03-27T18:45:34.237Z", "kind": "Topic", "slug": "sight-2014-03-27t184534237z"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sound-audition-2014-03-27t184545806z/", "id": "sound-audition-2014-03-27T18:45:45.806Z", "hide": false, "title": "Sound (Audition)", "child_data": [{"kind": "Video", "id": "xbb654a81"}, {"kind": "Video", "id": "x15ccf217"}, {"kind": "Video", "id": "xb6768f51"}, {"kind": "Video", "id": "x86e1d006"}], "children": [{"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sound-audition-2014-03-27t184545806z/auditory-structure-part-1/", "id": "6GB_kcdVMQo", "title": "Auditory structure - part 1", "kind": "Video", "slug": "auditory-structure-part-1"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sound-audition-2014-03-27t184545806z/auditory-structure-part-2/", "id": "B2vtvtqZwwQ", "title": "Auditory structure - part 2", "kind": "Video", "slug": "auditory-structure-part-2"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sound-audition-2014-03-27t184545806z/auditory-processing-video/", "id": "peSLM4XObBE", "title": "Auditory processing", "kind": "Video", "slug": "auditory-processing-video"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/sound-audition-2014-03-27t184545806z/cochlear-implant/", "id": "jhjoGx6eGXs", "title": "Cochlear implants", "kind": "Video", "slug": "cochlear-implant"}], "in_knowledge_map": false, "description": "Learn about how we hear, including the structure of the outer, middle, and inner ear, as well as the basics of auditory processing & cochlear implants.", "node_slug": "sound-audition-2014-03-27T18:45:45.806Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/nervous-system-and-sensory-infor/sound-audition-2014-03-27T18:45:45.806Z", "extended_slug": "science/health-and-medicine/nervous-system-and-sensory-infor/sound-audition-2014-03-27T18:45:45.806Z", "kind": "Topic", "slug": "sound-audition-2014-03-27t184545806z"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/somatosensation-2014-03-27t184557777z/", "id": "somatosensation-2014-03-27T18:45:57.777Z", "hide": false, "title": "Somatosensation", "child_data": [{"kind": "Video", "id": "xe595adb5"}, {"kind": "Video", "id": "x74c4a46e"}, {"kind": "Video", "id": "x7aa5781a"}, {"kind": "Video", "id": "x450f7a79"}, {"kind": "Video", "id": "x7f17449b"}], "children": [{"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/somatosensation-2014-03-27t184557777z/somatosensation-1/", "id": "FssCS9RhFt0", "title": "Somatosensation", "kind": "Video", "description": "Explore our ability to sense the environment through our body. \u00a0By Ron.", "slug": "somatosensation-1"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/somatosensation-2014-03-27t184557777z/sensory-adaptation-and-amplification/", "id": "JC_TVyAMYE0", "title": "Sensory adaptation and amplification", "kind": "Video", "description": "Sensory adaptation and amplification are discussed in this video to differentiate the two.\u00a0 By Ronald Sahyouni.", "slug": "sensory-adaptation-and-amplification"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/somatosensation-2014-03-27t184557777z/somatosensory-homunculus/", "id": "3jf2l9ma6SM", "title": "Somatosensory homunculus", "kind": "Video", "description": "In this video, I review the somatosensory homunculus, which is basically a \"topological\" representation of the body in the brain.\u00a0 By Ronald Sahyouni.", "slug": "somatosensory-homunculus"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/somatosensation-2014-03-27t184557777z/proprioception-kinesthesia/", "id": "yKfpBGicqNQ", "title": "Proprioception and kinesthesia", "kind": "Video", "description": "The differences between propioception (sense of body position) and kinesthesia (sense of body movement) are discussed.\u00a0 By Ronald Sahyouni.", "slug": "proprioception-kinesthesia"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/somatosensation-2014-03-27t184557777z/pain-and-temperature-1/", "id": "D-oAsFIHqbY", "title": "Pain and temperature", "kind": "Video", "description": "Explore our senses of pain & temperature. \u00a0By Ron.", "slug": "pain-and-temperature-1"}], "in_knowledge_map": false, "description": "We perceive the environment through our bodily senses, including our sensation of pain, temperature, pressure, balance, and movement. Discover how our body gathers this information and processes it so that we can make sense of the world.", "node_slug": "somatosensation-2014-03-27T18:45:57.777Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/nervous-system-and-sensory-infor/somatosensation-2014-03-27T18:45:57.777Z", "extended_slug": "science/health-and-medicine/nervous-system-and-sensory-infor/somatosensation-2014-03-27T18:45:57.777Z", "kind": "Topic", "slug": "somatosensation-2014-03-27t184557777z"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/taste-gustation-and-smell-olfaction-2014-03-27t184612074z/", "id": "taste (gustation) and smell (olfaction)-2014-03-27T18:46:12.074Z", "hide": false, "title": "Taste (gustation) and smell (olfaction)", "child_data": [{"kind": "Video", "id": "xf043d41e"}, {"kind": "Video", "id": "xc9ce0355"}, {"kind": "Video", "id": "xe6c1796a"}], "children": [{"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/taste-gustation-and-smell-olfaction-2014-03-27t184612074z/olfaction-structure-and-function/", "id": "5-McqAO8_Qw", "title": "Olfaction - structure and function", "kind": "Video", "slug": "olfaction-structure-and-function"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/taste-gustation-and-smell-olfaction-2014-03-27t184612074z/pheromones/", "id": "EO4_vu9IuNk", "title": "Pheromones", "kind": "Video", "slug": "pheromones"}, {"path": "khan/science/health-and-medicine/nervous-system-and-sensory-infor/taste-gustation-and-smell-olfaction-2014-03-27t184612074z/gustation-structure-and-function/", "id": "-vp1X7_u3KU", "title": "Gustation - structure and function", "kind": "Video", "slug": "gustation-structure-and-function"}], "in_knowledge_map": false, "description": "Learn about our senses of smell (olfaction) and taste (gustation), including the anatomy and underlying molecular basis behind these important senses.", "node_slug": "taste (gustation) and smell (olfaction)-2014-03-27T18:46:12.074Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/nervous-system-and-sensory-infor/taste (gustation) and smell (olfaction)-2014-03-27T18:46:12.074Z", "extended_slug": "science/health-and-medicine/nervous-system-and-sensory-infor/taste (gustation) and smell (olfaction)-2014-03-27T18:46:12.074Z", "kind": "Topic", "slug": "taste-gustation-and-smell-olfaction-2014-03-27t184612074z"}], "in_knowledge_map": false, "description": "There are billions and billions of neurons in your brain (about 85 billion), and they\u2019re all sending electrical signals throughout your body right now! They tell your eyes to move across this page, how to interpret the words that you read, how to maintain your posture, your heart rate, and your breathing...all of it in a fraction of a second. In this section, we\u2019ll explore the nature of this vast, complex system, from the cellular level to how it operates at a sensory level. A common misconception is that we only have 5 senses (see, smell, taste, hear, and feel), but we have many more that are nuanced but equally important. Learn more about how our bodies are designed to interact with the world.", "node_slug": "nervous-system-and-sensory-infor", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/nervous-system-and-sensory-infor", "extended_slug": "science/health-and-medicine/nervous-system-and-sensory-infor", "kind": "Topic", "slug": "nervous-system-and-sensory-infor"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/nervous-system-diseases/", "id": "nervous-system-diseases", "hide": false, "title": "Nervous system diseases", "child_data": [{"kind": "Topic", "id": "x0a80441e"}, {"kind": "Topic", "id": "x39296865"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/", "id": "parkinsons-disease", "hide": false, "title": "Parkinson's disease", "child_data": [{"kind": "Article", "id": "x2ed372cb"}, {"kind": "Video", "id": "x0510cb8d"}, {"kind": "Video", "id": "x526dd53f"}, {"kind": "Video", "id": "x2ede8a12"}, {"kind": "Video", "id": "xdf7a6891"}, {"kind": "Video", "id": "xe54cadaf"}, {"kind": "Video", "id": "x5713f158"}, {"kind": "Video", "id": "x9e8c5fb9"}, {"kind": "Video", "id": "x1f7fee7d"}, {"kind": "Video", "id": "xe35676e0"}, {"kind": "Video", "id": "x2d7a17c4"}, {"kind": "Video", "id": "xc76fc064"}], "children": [{"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/what-is-parkinsons-disease/", "id": "3n8UjH9h_8I", "title": "What is Parkinson's disease?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-parkinsons-disease"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/movement-signs-and-symptoms-of-parkinsons-disease/", "id": "4qdD4Ny34cc", "title": "Movement signs and symptoms of Parkinson's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "movement-signs-and-symptoms-of-parkinsons-disease"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/non-movement-symptoms-of-parkinsons-disease/", "id": "ZqWB25yUWnc", "title": "Non-movement symptoms of Parkinson's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "non-movement-symptoms-of-parkinsons-disease"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/the-basal-ganglia-the-direct-pathway/", "id": "Mmev06nabvk", "title": "The basal ganglia - The direct pathway", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-basal-ganglia-the-direct-pathway"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/the-basal-ganglia-concepts-of-the-indirect-pathway/", "id": "wLOEXEi7Uos", "title": "The basal ganglia - Concepts of the indirect pathway", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-basal-ganglia-concepts-of-the-indirect-pathway"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/putting-it-all-together-pathophysiology-of-parkinsons-disease/", "id": "8mvUDiBQbjg", "title": "Putting it all together - Pathophysiology of Parkinson's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "putting-it-all-together-pathophysiology-of-parkinsons-disease"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/the-basal-ganglia-details-of-the-indirect-pathway/", "id": "VZer0w7foLg", "title": "The basal ganglia - Details of the indirect pathway", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-basal-ganglia-details-of-the-indirect-pathway"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/genetics-and-parkinsons-disease/", "id": "FsE3QvWqeqs", "title": "Genetics and Parkinson's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "genetics-and-parkinsons-disease"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/diagnosing-parkinsons-disease/", "id": "Ny8a3eNG68M", "title": "Diagnosing Parkinson's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-parkinsons-disease"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/managing-parkinsons-disease-with-medications/", "id": "5hM8xUB07Y0", "title": "Managing Parkinson's disease with medications", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "managing-parkinsons-disease-with-medications"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/parkinsons-disease/managing-parkinsons-disease-with-surgery/", "id": "HFecdPI_-dg", "title": "Managing Parkinson's disease with surgery", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "managing-parkinsons-disease-with-surgery"}], "in_knowledge_map": false, "description": "", "node_slug": "parkinsons-disease", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/nervous-system-diseases/parkinsons-disease", "extended_slug": "science/health-and-medicine/nervous-system-diseases/parkinsons-disease", "kind": "Topic", "slug": "parkinsons-disease"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/nervous-system-diseases/multiple-sclerosis/", "id": "multiple-sclerosis", "hide": false, "title": "Multiple sclerosis", "child_data": [{"kind": "Video", "id": "xb47532ad"}, {"kind": "Video", "id": "x27c3c6b9"}, {"kind": "Video", "id": "x13ddfc5f"}, {"kind": "Video", "id": "xf887cf62"}, {"kind": "Video", "id": "x6dc21d00"}, {"kind": "Video", "id": "x5f347c5a"}, {"kind": "Video", "id": "xdddc6f64"}], "children": [{"path": "khan/science/health-and-medicine/nervous-system-diseases/multiple-sclerosis/what-is-multiple-sclerosis/", "id": "P_HHvi7Kwzk", "title": "What is multiple sclerosis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-multiple-sclerosis"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/multiple-sclerosis/multiple-sclerosis-signs-and-symptoms/", "id": "A8ZK4VWmbGc", "title": "Multiple sclerosis signs and symptoms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "multiple-sclerosis-signs-and-symptoms"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/multiple-sclerosis/clinical-progression-of-multiple-sclerosis/", "id": "qCs7HPSDL8A", "title": "Clinical progression of multiple sclerosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "clinical-progression-of-multiple-sclerosis"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/multiple-sclerosis/multiple-sclerosis-pathophysiology/", "id": "aERRyWMwyvk", "title": "Multiple sclerosis pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "multiple-sclerosis-pathophysiology"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/multiple-sclerosis/multiple-sclerosis-risk-factors/", "id": "yby2zx6q_yQ", "title": "Multiple sclerosis risk factors", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "multiple-sclerosis-risk-factors"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/multiple-sclerosis/multiple-sclerosis-diagnosis/", "id": "y1PCYctq3yo", "title": "Multiple sclerosis diagnosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "multiple-sclerosis-diagnosis"}, {"path": "khan/science/health-and-medicine/nervous-system-diseases/multiple-sclerosis/multiple-sclerosis-treatment/", "id": "8exiUQAiw3w", "title": "Multiple sclerosis treatment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "multiple-sclerosis-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "multiple-sclerosis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/nervous-system-diseases/multiple-sclerosis", "extended_slug": "science/health-and-medicine/nervous-system-diseases/multiple-sclerosis", "kind": "Topic", "slug": "multiple-sclerosis"}], "in_knowledge_map": false, "description": "", "node_slug": "nervous-system-diseases", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/nervous-system-diseases", "extended_slug": "science/health-and-medicine/nervous-system-diseases", "kind": "Topic", "slug": "nervous-system-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/gastro-intestinal-system/", "id": "gastro-intestinal-system", "hide": false, "title": "Advanced gastrointestinal physiology", "child_data": [{"kind": "Topic", "id": "x456b911c"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/gastro-intestinal-system/gastrointestinal-intro/", "id": "gastrointestinal-intro", "hide": false, "title": "Gastrointestinal system introduction", "child_data": [{"kind": "Video", "id": "x9884099f"}], "children": [{"path": "khan/science/health-and-medicine/gastro-intestinal-system/gastrointestinal-intro/meet-the-gastrointestinal-tract/", "id": "Oh_Pt_UrtEE", "title": "Meet the gastrointestinal tract!", "kind": "Video", "slug": "meet-the-gastrointestinal-tract"}], "in_knowledge_map": false, "description": "Do you live to eat, or eat to live? Folks fall on both sides of this question, but who deny the powerful role that food and water play in our everyday lives. If we were cars, food and water would be the gasoline. Eating keeps us moving, laughing, playing, and learning. The energy from food is carefully extracted through a process of ingestion, digestion, and absorption, and requires one long (very long!) tube with a couple of key organs (liver, pancreas) sprouting off of it. Go ahead and grab a bite to eat before we get started\u2026", "node_slug": "gastrointestinal-intro", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/gastro-intestinal-system/gastrointestinal-intro", "extended_slug": "science/health-and-medicine/gastro-intestinal-system/gastrointestinal-intro", "kind": "Topic", "slug": "gastrointestinal-intro"}], "in_knowledge_map": false, "description": "", "node_slug": "gastro-intestinal-system", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/gastro-intestinal-system", "extended_slug": "science/health-and-medicine/gastro-intestinal-system", "kind": "Topic", "slug": "gastro-intestinal-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/advanced-muscular-system/", "id": "advanced-muscular-system", "hide": false, "title": "Advanced muscular-skeletal system physiology", "child_data": [{"kind": "Topic", "id": "x1e3f62fb"}, {"kind": "Topic", "id": "xc8aac933"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/advanced-muscular-system/muscular-system-introduction/", "id": "Muscular-system-introduction", "hide": false, "title": "Muscular system introduction", "child_data": [{"kind": "Video", "id": "24004"}], "children": [{"path": "khan/science/health-and-medicine/advanced-muscular-system/muscular-system-introduction/myosin-and-actin/", "id": "zopoN2i7ALQ", "title": "Myosin and actin", "kind": "Video", "description": "How myosin and actin interact to produce mechanical force.", "slug": "myosin-and-actin"}], "in_knowledge_map": false, "description": "Muscles never sleep (literally). If you have ever taken a breath, you have benefited from the work of the diaphragm, which contracts to create an area of low pressure within your thoracic cavity, allowing air in. How exactly are some weightlifters able to support 717 lbs without breaking anything more than a little sweat? Fun fact: the largest muscle in your body is the gluteus maximus (that\u2019s your butt) while the smallest skeletal muscle is the stapedius (it stabilizes the smallest bone, the stapes, which is in your middle ear).", "node_slug": "Muscular-system-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/advanced-muscular-system/Muscular-system-introduction", "extended_slug": "science/health-and-medicine/advanced-muscular-system/Muscular-system-introduction", "kind": "Topic", "slug": "muscular-system-introduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/advanced-muscular-system/skeletal-system-introduction/", "id": "skeletal-system-introduction", "hide": false, "title": "Skeletal system introduction", "child_data": [{"kind": "Video", "id": "x5e2ec71a"}, {"kind": "Video", "id": "x2354d3d6"}], "children": [{"path": "khan/science/health-and-medicine/advanced-muscular-system/skeletal-system-introduction/skeletal-structure-and-function/", "id": "muiNDpURT9M", "title": "Skeletal structure and function", "kind": "Video", "slug": "skeletal-structure-and-function"}, {"path": "khan/science/health-and-medicine/advanced-muscular-system/skeletal-system-introduction/microscopic-structure-of-bone-haversian-system/", "id": "6_PP49FuyTM", "title": "Microscopic structure of bone - the Haversian system", "kind": "Video", "slug": "microscopic-structure-of-bone-haversian-system"}], "in_knowledge_map": false, "description": "", "node_slug": "skeletal-system-introduction", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/advanced-muscular-system/skeletal-system-introduction", "extended_slug": "science/health-and-medicine/advanced-muscular-system/skeletal-system-introduction", "kind": "Topic", "slug": "skeletal-system-introduction"}], "in_knowledge_map": false, "description": "", "node_slug": "advanced-muscular-system", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/advanced-muscular-system", "extended_slug": "science/health-and-medicine/advanced-muscular-system", "kind": "Topic", "slug": "advanced-muscular-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/muscular-skeletal-diseases/", "id": "muscular-skeletal-diseases", "hide": false, "title": "Muscular-skeletal diseases", "child_data": [{"kind": "Topic", "id": "x89cab9d5"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/muscular-skeletal-diseases/arthritis/", "id": "arthritis", "hide": false, "title": "Arthritis and rheumatoid arthritis", "child_data": [{"kind": "Article", "id": "x06735807"}, {"kind": "Video", "id": "x61613b8e"}, {"kind": "Video", "id": "x0483a918"}, {"kind": "Video", "id": "x25735026"}, {"kind": "Video", "id": "xd41f51e5"}, {"kind": "Video", "id": "xa4221e0e"}, {"kind": "Video", "id": "x91eb757c"}, {"kind": "Video", "id": "x80f1982b"}, {"kind": "Video", "id": "xd7cfa0a8"}, {"kind": "Video", "id": "x760cdb46"}], "children": [{"path": "khan/science/health-and-medicine/muscular-skeletal-diseases/arthritis/what-is-arthritis/", "id": "3X5UEYD94-M", "title": "What is arthritis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-arthritis"}, {"path": "khan/science/health-and-medicine/muscular-skeletal-diseases/arthritis/osteoarthritis-vs-rheumatoid-arthritis-symptoms/", "id": "H-OoyU8Gb_Q", "title": "Osteoarthritis vs rheumatoid arthritis symptoms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "osteoarthritis-vs-rheumatoid-arthritis-symptoms"}, {"path": "khan/science/health-and-medicine/muscular-skeletal-diseases/arthritis/osteoarthritis-vs-rheumatoid-arthritis-pathophysiology/", "id": "VIfQh71XwMM", "title": "Osteoarthritis vs rheumatoid arthritis pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "osteoarthritis-vs-rheumatoid-arthritis-pathophysiology"}, {"path": "khan/science/health-and-medicine/muscular-skeletal-diseases/arthritis/osteoarthritis-vs-rheumatoid-arthritis-treatments/", "id": "2xFXOEa-xCk", "title": "Osteoarthritis vs rheumatoid arthritis treatments", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "osteoarthritis-vs-rheumatoid-arthritis-treatments"}, {"path": "khan/science/health-and-medicine/muscular-skeletal-diseases/arthritis/ankylosing-spondylitis/", "id": "7Fxt6E7m7bM", "title": "Ankylosing spondylitis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "ankylosing-spondylitis"}, {"path": "khan/science/health-and-medicine/muscular-skeletal-diseases/arthritis/reiters-syndrome/", "id": "dzQwIqc6dQE", "title": "Reiter's syndrome", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "reiters-syndrome"}, {"path": "khan/science/health-and-medicine/muscular-skeletal-diseases/arthritis/infectious-arthritis/", "id": "CsrUfTljLJ8", "title": "Infectious arthritis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "infectious-arthritis"}, {"path": "khan/science/health-and-medicine/muscular-skeletal-diseases/arthritis/gout-and-pseudogout/", "id": "1O3F-b8FfDY", "title": "Gout and pseudogout", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "gout-and-pseudogout"}, {"path": "khan/science/health-and-medicine/muscular-skeletal-diseases/arthritis/gout-pathophysiology/", "id": "2r95ZVqAysQ", "title": "Gout pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "gout-pathophysiology"}], "in_knowledge_map": false, "description": "", "node_slug": "arthritis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/muscular-skeletal-diseases/arthritis", "extended_slug": "science/health-and-medicine/muscular-skeletal-diseases/arthritis", "kind": "Topic", "slug": "arthritis"}], "in_knowledge_map": false, "description": "", "node_slug": "muscular-skeletal-diseases", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/muscular-skeletal-diseases", "extended_slug": "science/health-and-medicine/muscular-skeletal-diseases", "kind": "Topic", "slug": "muscular-skeletal-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/executive-systems-of-the-brain/", "id": "executive systems of the brain", "hide": false, "title": "Executive systems of the brain", "child_data": [{"kind": "Topic", "id": "x6590a52f"}, {"kind": "Topic", "id": "xcdb211ac"}, {"kind": "Topic", "id": "x0e0d6702"}, {"kind": "Topic", "id": "xb8eaee04"}, {"kind": "Topic", "id": "x69000daa"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/executive-systems-of-the-brain/cognition-2014-03-27t184004738z/", "id": "cognition-2014-03-27T18:40:04.738Z", "hide": false, "title": "Cognition", "child_data": [{"kind": "Video", "id": "x2b063cea"}, {"kind": "Video", "id": "x22fb46e3"}, {"kind": "Video", "id": "x4720caf5"}, {"kind": "Video", "id": "x9db82d8c"}, {"kind": "Video", "id": "x34bf905a"}, {"kind": "Video", "id": "xc787dfb9"}], "children": [{"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/cognition-2014-03-27t184004738z/piagets-stages-of-cognitive-development/", "id": "Czwrqu5czFU", "title": "Piaget's stages of cognitive development", "kind": "Video", "description": "\u200bLearn about the stages and developmental milestones in Piaget's theory of cognitive development.", "slug": "piagets-stages-of-cognitive-development"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/cognition-2014-03-27t184004738z/problem-solving/", "id": "W5QExA4er6w", "title": "Problem solving", "kind": "Video", "description": "Learn about types of problems and common approaches to solving them.", "slug": "problem-solving"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/cognition-2014-03-27t184004738z/decision-making/", "id": "aNDnU3udYBg", "title": "Decision making", "kind": "Video", "description": "Learn about common heuristics, biases, and other factors that affect our decisions.", "slug": "decision-making"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/cognition-2014-03-27t184004738z/semantic-networks-and-spreading-activation/", "id": "0RSMKyRVuV8", "title": "Semantic networks and spreading activation", "kind": "Video", "description": "\u200bLearn about how knowledge is organized in the mind.", "slug": "semantic-networks-and-spreading-activation"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/cognition-2014-03-27t184004738z/intelligence/", "id": "C0KEPCFZ3so", "title": "Intelligence", "kind": "Video", "description": "Learn about different definitions of intelligence and the nature/nurture debate in the context of intelligence.", "slug": "intelligence"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/cognition-2014-03-27t184004738z/aging-and-cognitive/", "id": "pADnoU7FWLg", "title": "Aging and cognitive abilities", "kind": "Video", "description": "\u200bLearn about how cognitive abilities change as we age.", "slug": "aging-and-cognitive"}], "in_knowledge_map": false, "description": "Explore cognitive development and intelligence, as well as how our minds solve problems, make decisions, and represent knowledge.", "node_slug": "cognition-2014-03-27T18:40:04.738Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/executive systems of the brain/cognition-2014-03-27T18:40:04.738Z", "extended_slug": "science/health-and-medicine/executive systems of the brain/cognition-2014-03-27T18:40:04.738Z", "kind": "Topic", "slug": "cognition-2014-03-27t184004738z"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/executive-systems-of-the-brain/attention-language-2014-03-27t184012306z/", "id": "attention-language-2014-03-27T18:40:12.306Z", "hide": false, "title": "Attention and language", "child_data": [{"kind": "Video", "id": "x1d7ed338"}, {"kind": "Video", "id": "xa5af5a83"}, {"kind": "Video", "id": "xb62bacac"}, {"kind": "Video", "id": "xf3411dc4"}, {"kind": "Video", "id": "x1a9c4ab5"}], "children": [{"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/attention-language-2014-03-27t184012306z/divided-selective-attention-inattentional-change-blindness/", "id": "s4JBqLoY3tY", "title": "Divided attention, selective attention, inattentional blindness, & change blindness", "kind": "Video", "description": "Learn about divided attention, selective attention, inattentional blindness, & change blindness. By Carole Yue.", "slug": "divided-selective-attention-inattentional-change-blindness"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/attention-language-2014-03-27t184012306z/selective-attention/", "id": "qpsaHE_uZic", "title": "Theories of selective attention", "kind": "Video", "description": "Learn about the three major theories of selective attention. By Carole Yue.", "slug": "selective-attention"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/attention-language-2014-03-27t184012306z/language-and-cognition/", "id": "RgvmKfvCwps", "title": "Theories of language and cognition", "kind": "Video", "description": "Learn about theories of the relationship between language and cognition. By Carole Yue.", "slug": "language-and-cognition"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/attention-language-2014-03-27t184012306z/theories-of-language-development/", "id": "RRGwdfQV8kU", "title": "Theories of language development: Nativist, learning, interactionist", "kind": "Video", "description": "Learn about the nativist, learning, and interactionist theories of human language development. By Carole Yue.", "slug": "theories-of-language-development"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/attention-language-2014-03-27t184012306z/language-and-the-brain/", "id": "lBqShvm4QRA", "title": "Language and the brain: Aphasia and split-brain patients", "kind": "Video", "description": "Learn about language areas of the brain and the effects of damage to those parts of the brain. By Carole Yue.", "slug": "language-and-the-brain"}], "in_knowledge_map": false, "description": "Have you ever tried to multi-task? Explore the concept of selective and divided attention, as well as the role of language in cognition and development.", "node_slug": "attention-language-2014-03-27T18:40:12.306Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/executive systems of the brain/attention-language-2014-03-27T18:40:12.306Z", "extended_slug": "science/health-and-medicine/executive systems of the brain/attention-language-2014-03-27T18:40:12.306Z", "kind": "Topic", "slug": "attention-language-2014-03-27t184012306z"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/executive-systems-of-the-brain/sleep-and-consciousness-2014-03-27t184021036z/", "id": "sleep-and-consciousness-2014-03-27T18:40:21.036Z", "hide": false, "title": "Sleep and consciousness", "child_data": [{"kind": "Video", "id": "xcc9a7a57"}, {"kind": "Video", "id": "x24b32aa0"}, {"kind": "Video", "id": "x4ad34281"}, {"kind": "Video", "id": "xd109a8fb"}, {"kind": "Video", "id": "x2ddfbb8a"}], "children": [{"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/sleep-and-consciousness-2014-03-27t184021036z/sleep-and-consciousness/", "id": "WFnyLmL9t2I", "title": "States of consciousness", "kind": "Video", "slug": "sleep-and-consciousness"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/sleep-and-consciousness-2014-03-27t184021036z/sleep-stages-and-circadian-rhythms/", "id": "fNlp0UMqUtM", "title": "Sleep stages and circadian rhythms", "kind": "Video", "slug": "sleep-stages-and-circadian-rhythms"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/sleep-and-consciousness-2014-03-27t184021036z/dreaming/", "id": "TGwXMpWvcYU", "title": "Dreaming", "kind": "Video", "slug": "dreaming"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/sleep-and-consciousness-2014-03-27t184021036z/sleep-disorders/", "id": "VBcEz8bVbL0", "title": "Sleep disorders", "kind": "Video", "slug": "sleep-disorders"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/sleep-and-consciousness-2014-03-27t184021036z/hypnosis-and-meditation/", "id": "Gv_1viYhEoU", "title": "Hypnosis and meditation", "kind": "Video", "slug": "hypnosis-and-meditation"}], "in_knowledge_map": false, "description": "Explore states of consciousness, circadian rhythms, sleep stages, and sleep disorders.", "node_slug": "sleep-and-consciousness-2014-03-27T18:40:21.036Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/executive systems of the brain/sleep-and-consciousness-2014-03-27T18:40:21.036Z", "extended_slug": "science/health-and-medicine/executive systems of the brain/sleep-and-consciousness-2014-03-27T18:40:21.036Z", "kind": "Topic", "slug": "sleep-and-consciousness-2014-03-27t184021036z"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/executive-systems-of-the-brain/memory-2014-03-27t184029837z/", "id": "memory-2014-03-27T18:40:29.837Z", "hide": false, "title": "Memory", "child_data": [{"kind": "Video", "id": "x52d1966e"}, {"kind": "Video", "id": "x2f413e05"}, {"kind": "Video", "id": "xf38bb3ef"}, {"kind": "Video", "id": "x3d533add"}, {"kind": "Video", "id": "xffdb9be4"}, {"kind": "Video", "id": "x3a871e46"}, {"kind": "Video", "id": "x38b33f79"}, {"kind": "Video", "id": "x6fb13071"}, {"kind": "Video", "id": "x3dac9945"}], "children": [{"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/memory-2014-03-27t184029837z/information-processing-model-sensory-working-and-long-term-memory/", "id": "pMMRE4Q2FGk", "title": "Information processing model: Sensory, working, and long term memory", "kind": "Video", "description": "Learn about the information processing model of human memory.", "slug": "information-processing-model-sensory-working-and-long-term-memory"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/memory-2014-03-27t184029837z/encoding-strategies/", "id": "mlrOJgyPySw", "title": "Encoding strategies", "kind": "Video", "description": "Learn about rote rehearsal, chunking, mnemonic devices, self-referencing, and spacing.", "slug": "encoding-strategies"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/memory-2014-03-27t184029837z/retrieval-cues/", "id": "aUmApJMfUTc", "title": "Retrieval cues", "kind": "Video", "description": "Learn about how priming, environmental context, and internal state affect memory.", "slug": "retrieval-cues"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/memory-2014-03-27t184029837z/retrieval-free-recall-cued-recall-and-recognition/", "id": "i6LY9q9UIas", "title": "Retrieval: Free recall, cued recall, and recognition", "kind": "Video", "description": "Learn about three types of retrieval: free recall, cued recall, and recognition.", "slug": "retrieval-free-recall-cued-recall-and-recognition"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/memory-2014-03-27t184029837z/memory-reconstruction-source-monitoring-and-emotional-memories/", "id": "xv-UAPbcbNU", "title": "Memory reconstruction, source monitoring, and emotional memories", "kind": "Video", "description": "Learn about memory reconstruction, source monitoring, and flashbulb memories.", "slug": "memory-reconstruction-source-monitoring-and-emotional-memories"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/memory-2014-03-27t184029837z/long-term-potentiation-and-synaptic-plasticity/", "id": "uVQXZudZd5s", "title": "Long term potentiation and synaptic plasticity", "kind": "Video", "description": "Learn about synaptic plasticity and long-term potentiation, the physiological mechanism behind learning.", "slug": "long-term-potentiation-and-synaptic-plasticity"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/memory-2014-03-27t184029837z/decay-and-interference/", "id": "47JRs6hF_ic", "title": "Decay and interference", "kind": "Video", "description": "Learn about decay and interference in human memory.", "slug": "decay-and-interference"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/memory-2014-03-27t184029837z/aging-and-cognitive-abilities/", "id": "45qlm6cfHgg", "title": "Aging and cognitive abilities", "kind": "Video", "description": "Learn about how cognitive abilities change as we age.", "slug": "aging-and-cognitive-abilities"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/memory-2014-03-27t184029837z/alzheimer-s-disease-and-korsakoff-s-syndrome/", "id": "qWfwRbSrQMU", "title": "Alzheimer's disease and Korsakoff's syndrome", "kind": "Video", "description": "Learn about how Alzheimer's Disease and Korsakoff's Syndrome affect memory.", "slug": "alzheimer-s-disease-and-korsakoff-s-syndrome"}], "in_knowledge_map": false, "description": "Explore the structure of human memory; processes involved in normal encoding, retrieval, forgetting, and aging; and diseases affecting memory.", "node_slug": "memory-2014-03-27T18:40:29.837Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/executive systems of the brain/memory-2014-03-27T18:40:29.837Z", "extended_slug": "science/health-and-medicine/executive systems of the brain/memory-2014-03-27T18:40:29.837Z", "kind": "Topic", "slug": "memory-2014-03-27t184029837z"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/executive-systems-of-the-brain/emotion-2014-03-27t184038294z/", "id": "emotion-2014-03-27T18:40:38.294Z", "hide": false, "title": "Emotion", "child_data": [{"kind": "Video", "id": "x639b76fd"}, {"kind": "Video", "id": "x7e6e34b8"}, {"kind": "Video", "id": "x8fc432d5"}, {"kind": "Video", "id": "x3ac472a8"}, {"kind": "Video", "id": "x46a0c767"}], "children": [{"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/emotion-2014-03-27t184038294z/emotions-limbic-system/", "id": "GDlDirzOSI8", "title": "Emotions: limbic system", "kind": "Video", "slug": "emotions-limbic-system"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/emotion-2014-03-27t184038294z/emotions-cerebral-hemispheres-and-prefrontal-cortex/", "id": "TQ51Gsb98ec", "title": "Emotions: cerebral hemispheres and prefrontal cortex", "kind": "Video", "slug": "emotions-cerebral-hemispheres-and-prefrontal-cortex"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/emotion-2014-03-27t184038294z/autonomic-nervous-system-ans-and-physiologic-markers-of-emotion/", "id": "yIWKrQTznXc", "title": "Autonomic nervous system (ANS) and physiologic markers of emotion", "kind": "Video", "slug": "autonomic-nervous-system-ans-and-physiologic-markers-of-emotion"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/emotion-2014-03-27t184038294z/three-components-of-emotion-and-the-universal-emotions/", "id": "qOYCeAlukMk", "title": "Three components of emotion and the universal emotions", "kind": "Video", "slug": "three-components-of-emotion-and-the-universal-emotions"}, {"path": "khan/science/health-and-medicine/executive-systems-of-the-brain/emotion-2014-03-27t184038294z/theories-of-emotion/", "id": "FkDVucEoJpU", "title": "Theories of Emotion", "kind": "Video", "slug": "theories-of-emotion"}], "in_knowledge_map": false, "description": "Learn about the physiological, behavioral, and cognitive components of emotion. Appreciate how different areas of our brain play a role in emotion. Understand the basic theories of emotion.", "node_slug": "emotion-2014-03-27T18:40:38.294Z", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/executive systems of the brain/emotion-2014-03-27T18:40:38.294Z", "extended_slug": "science/health-and-medicine/executive systems of the brain/emotion-2014-03-27T18:40:38.294Z", "kind": "Topic", "slug": "emotion-2014-03-27t184038294z"}], "in_knowledge_map": false, "description": "Aristotle asserted that what separates humankind from non-human animals is our ability to engage in high reasoning. This reasoning includes solving problems, making decisions, recalling and recording memories, and expressing complex emotions. We\u2019ll explore different states of consciousness, and how our brain adapts and responds to stimuli. Learn all about the higher-order executive functions of the brain, which help you remember your friend\u2019s name, learn a new language, and even fall asleep at night.", "node_slug": "executive systems of the brain", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/executive systems of the brain", "extended_slug": "science/health-and-medicine/executive systems of the brain", "kind": "Topic", "slug": "executive-systems-of-the-brain"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/infectious-diseases/", "id": "infectious-diseases", "hide": false, "title": "Infectious diseases", "child_data": [{"kind": "Topic", "id": "x367aad97"}, {"kind": "Topic", "id": "xc859785b"}, {"kind": "Topic", "id": "x0b35bcd7"}, {"kind": "Topic", "id": "x3d8943cb"}, {"kind": "Topic", "id": "x45118de6"}, {"kind": "Topic", "id": "xef27cba5"}, {"kind": "Topic", "id": "x8343d468"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/", "id": "tuberculosis", "hide": false, "title": "Tuberculosis", "child_data": [{"kind": "Article", "id": "x888832f4"}, {"kind": "Video", "id": "x29195b3b"}, {"kind": "Video", "id": "x8a44aa61"}, {"kind": "Video", "id": "x78ad6189"}, {"kind": "Video", "id": "x21432e85"}, {"kind": "Video", "id": "x01adc883"}, {"kind": "Video", "id": "x83ba10b3"}, {"kind": "Video", "id": "xbe2b5861"}, {"kind": "Video", "id": "x1ad461d7"}, {"kind": "Video", "id": "xc014a915"}, {"kind": "Video", "id": "xe2f122ee"}, {"kind": "Video", "id": "xcbaac90c"}, {"kind": "Video", "id": "x8a772643"}, {"kind": "Video", "id": "xae1e013d"}, {"kind": "Video", "id": "xc348c3fa"}, {"kind": "Video", "id": "x4ee1362f"}], "children": [{"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/what-is-tb/", "id": "wV1pllyOaj8", "title": "What is TB?", "kind": "Video", "description": "Find out the basics of TB, where it comes from and where it goes. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-tb"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/tb-epidemiology/", "id": "56tSt0TpnAk", "title": "TB epidemiology", "kind": "Video", "description": "Find out how many lives are affected by TB around the world. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "tb-epidemiology"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/tb-pathogenesis/", "id": "S0Kak0qQFgM", "title": "TB pathogenesis", "kind": "Video", "description": "Find out exactly how TB causes damage to the lungs. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "tb-pathogenesis"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/primary-and-secondary-tb/", "id": "3Em2Zzn796Q", "title": "Primary and Secondary TB", "kind": "Video", "description": "Learn some key features of primary TB and how it differs from secondary TB. Rishi is a pediatric infectious disease physician and works at Khan Academy.These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "primary-and-secondary-tb"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/pulmonary-tb/", "id": "tp_qdvgXtVc", "title": "Pulmonary TB", "kind": "Video", "description": "Learn the effects that TB has on the lungs and some important clinical clues.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pulmonary-tb"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/extrapulmonary-tb-part-1/", "id": "Oa6dezr0JkE", "title": "Extrapulmonary TB (part 1)", "kind": "Video", "description": "Learn about how TB can spread beyond your lungs.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "extrapulmonary-tb-part-1"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/extrapulmonary-tb-part-2/", "id": "C4nfSAr2eWI", "title": "Extrapulmonary TB (Part 2)", "kind": "Video", "description": "Learn about how TB can spread beyond your lungs.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "extrapulmonary-tb-part-2"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/mantoux-test-aka-ppd-or-tst/", "id": "qbXKrR9BQmg", "title": "Mantoux test (aka. PPD or TST)", "kind": "Video", "description": "Learn how the Mantoux test is done and how it works. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "mantoux-test-aka-ppd-or-tst"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/interpreting-the-ppd/", "id": "m9b_h7TiRR8", "title": "Interpreting the PPD", "kind": "Video", "description": "Find out how the cutoff for a \"positive PPD\" depends on clinical clues. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "interpreting-the-ppd"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/diagnosing-active-tb/", "id": "faqhDcrWfHQ", "title": "Diagnosing active TB", "kind": "Video", "description": "Find out how we can use clinical clues to help figure out if someone has active TB infection.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-active-tb"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/preventing-tb-transmission/", "id": "hAXnQgU4bsg", "title": "Preventing TB transmission", "kind": "Video", "description": "There are a number of ways that we can help to prevent TB from spreading, learn some of the most common ones. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preventing-tb-transmission"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/preventing-tb-using-the-4-i-s/", "id": "_20mkyAB7tY", "title": "Preventing TB using the \"4 I's\"", "kind": "Video", "description": "Learn how to help prevent TB disease using Intensive case finding, Isoniazid, Isolation, and Immunization.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preventing-tb-using-the-4-i-s"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/treatment-of-active-tb/", "id": "2K1ekrZ6ej4", "title": "Treatment of Active TB", "kind": "Video", "description": "Learn which medications help prevent active TB disease.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatment-of-active-tb"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/drug-resistant-tb/", "id": "vce3BZFo27Y", "title": "Drug-resistant TB", "kind": "Video", "description": "Learn the different types of drug-resistant TB \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "drug-resistant-tb"}, {"path": "khan/science/health-and-medicine/infectious-diseases/tuberculosis/tb-and-hiv/", "id": "S8s-g7KZR50", "title": "TB and HIV", "kind": "Video", "description": "Two deadly diseases, HIV and TB, can often co-exist in the same patient.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "tb-and-hiv"}], "in_knowledge_map": false, "description": "Almost one third of the entire world\u2019s population is infected with Mycobacterium tuberculosis, the type of bacteria that causes TB. Although only a fraction of these people will actually become sick with the disease, in 2012, the World Health Organization reported 1.3 million TB related deaths. The good news is that health care workers and public health officials around the world have done a great job of helping to detect and treat the disease early. The bad news is that TB is developing drug resistance. Learn more about this ancient disease, that still plagues us in the modern-day.", "node_slug": "tuberculosis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/infectious-diseases/tuberculosis", "extended_slug": "science/health-and-medicine/infectious-diseases/tuberculosis", "kind": "Topic", "slug": "tuberculosis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/infectious-diseases/pertussis/", "id": "pertussis", "hide": false, "title": "Pertussis", "child_data": [{"kind": "Video", "id": "xb8c0da6c"}, {"kind": "Video", "id": "xff4fb435"}, {"kind": "Video", "id": "xa516afdb"}, {"kind": "Video", "id": "x01e6835e"}, {"kind": "Video", "id": "x6440e097"}], "children": [{"path": "khan/science/health-and-medicine/infectious-diseases/pertussis/what-is-pertussis/", "id": "5tXV-8-6tw0", "title": "What is pertussis?", "kind": "Video", "slug": "what-is-pertussis"}, {"path": "khan/science/health-and-medicine/infectious-diseases/pertussis/complications-of-pertussis/", "id": "qkVX03qMzb4", "title": "Pertussis complications", "kind": "Video", "slug": "complications-of-pertussis"}, {"path": "khan/science/health-and-medicine/infectious-diseases/pertussis/pathophysiology-of-pertussis/", "id": "XLcyqs5vQHQ", "title": "Pathophysiology of pertussis", "kind": "Video", "slug": "pathophysiology-of-pertussis"}, {"path": "khan/science/health-and-medicine/infectious-diseases/pertussis/diagnosing-and-treating-pertussis/", "id": "UgXZFel0H8Q", "title": "Pertussis diagnosis and treatment", "kind": "Video", "slug": "diagnosing-and-treating-pertussis"}, {"path": "khan/science/health-and-medicine/infectious-diseases/pertussis/pertussis-vaccine/", "id": "swQgTqphZzE", "title": "Pertussis vaccine", "kind": "Video", "slug": "pertussis-vaccine"}], "in_knowledge_map": false, "description": "", "node_slug": "pertussis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/infectious-diseases/pertussis", "extended_slug": "science/health-and-medicine/infectious-diseases/pertussis", "kind": "Topic", "slug": "pertussis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/infectious-diseases/influenza/", "id": "influenza", "hide": false, "title": "Influenza", "child_data": [{"kind": "Video", "id": "1297441428"}, {"kind": "Video", "id": "1297348689"}, {"kind": "Video", "id": "1297459474"}, {"kind": "Video", "id": "1297563079"}, {"kind": "Video", "id": "1296964565"}, {"kind": "Video", "id": "1303681758"}, {"kind": "Video", "id": "1403730177"}, {"kind": "Video", "id": "1297589033"}, {"kind": "Video", "id": "1303800013"}, {"kind": "Video", "id": "1297443575"}, {"kind": "Video", "id": "1304013333"}, {"kind": "Video", "id": "1303958606"}, {"kind": "Video", "id": "1403719429"}, {"kind": "Video", "id": "1303688729"}, {"kind": "Video", "id": "1403742072"}, {"kind": "Video", "id": "1403321001"}, {"kind": "Video", "id": "1297502187"}], "children": [{"path": "khan/science/health-and-medicine/infectious-diseases/influenza/what-is-the-flu/", "id": "wiWRUuRDXvc", "title": "What is the flu?", "kind": "Video", "description": "Learn the difference between the cold and the flu, and how we sometimes can get fooled by viruses! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-the-flu"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/catching-and-spreading-the-flu/", "id": "6vy5CX6vK0I", "title": "Catching and spreading the flu", "kind": "Video", "description": "Find out how the flu spreads from person to person, and who is at the greatest risk of getting complications of the flu. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "catching-and-spreading-the-flu"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/when-flu-viruses-attack/", "id": "MNKXq7c3eQU", "title": "When flu viruses attack!", "kind": "Video", "description": "Learn how flu viruses get into and out of your cells using Hemagglutinin and Neuraminidase proteins on their surface. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "when-flu-viruses-attack"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/three-types-of-flu/", "id": "XCdvo5fv-W0", "title": "Three types of flu", "kind": "Video", "description": "Learn about the three types of influenza virus (Type A, Type B, and Type C) and what makes them differ from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "three-types-of-flu"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/naming-the-flu-h-something-n-something/", "id": "nVbgByJNLOo", "title": "Naming the flu: H-something, N-something", "kind": "Video", "description": "We've all heard of H1N1 or H3N2; now you can understand what all of those names mean and find out why they are helpful in keeping track of the different flu virueses! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "naming-the-flu-h-something-n-something"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/testing-for-the-flu/", "id": "f93KCgI4DGM", "title": "Testing for the flu", "kind": "Video", "description": "Learn when testing for influenza makes sense, and the most common test that is used. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "testing-for-the-flu"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/antiviral-drugs-for-the-flu/", "id": "NaZTlnDlnOA", "title": "Antiviral drugs for the flu", "kind": "Video", "description": "Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "antiviral-drugs-for-the-flu"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/genetic-shift-in-flu/", "id": "-J--4Jc5FB0", "title": "Genetic shift in flu", "kind": "Video", "description": "Find out how the genetic material in the Type A flu virus can get shuffled around to create brand new types of viruses! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "genetic-shift-in-flu"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/flu-vaccine-efficacy/", "id": "Ma9YxZiBiRU", "title": "Flu vaccine efficacy", "kind": "Video", "description": "Find out just how useful the flu vaccine actually is at preventing the flu! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "flu-vaccine-efficacy"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/flu-shift-and-drift/", "id": "tjGGxA7AF9E", "title": "Flu shift and drift", "kind": "Video", "description": "Learn how Type B Influenza virus has genetic drift, whereas Type A Influenza virus has genetic drift AND shift. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "flu-shift-and-drift"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/two-flu-vaccines-tiv-and-laiv/", "id": "4mXv-Pa4CMM", "title": "Two flu vaccines (TIV and LAIV)", "kind": "Video", "description": "Understand the differences between TIV (dead virus) and LAIV (alive, but weakened virus) and who should get which one. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "two-flu-vaccines-tiv-and-laiv"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/flu-vaccine-risks-and-benefits/", "id": "2h09oj26_H0", "title": "Flu vaccine risks and benefits", "kind": "Video", "description": "Learn about some of the common and uncommon risks and benefits associated with the flu vaccine! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "flu-vaccine-risks-and-benefits"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/making-flu-vaccine-each-year/", "id": "Xn29pt5159k", "title": "Making flu vaccine each year", "kind": "Video", "description": "Learn about how the flu vaccine is made every year and how they name the strains that they put inside. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "making-flu-vaccine-each-year"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/5-common-flu-vaccine-excuses/", "id": "wDghWK_Rr_E", "title": "5 common flu vaccine excuses", "kind": "Video", "description": "Many people choose to avoid the flu vaccine each year. Review five popular excuses, and how they relate to common misunderstandings about the flu. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "5-common-flu-vaccine-excuses"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/vaccines-and-the-autism-myth-part-1/", "id": "u6gpw_Deth8", "title": "Vaccines and the autism myth - part 1", "kind": "Video", "description": "The infamous Wakefield study kickstarted the Autism Myth, but many studies have since shown that there is no link between the MMR Vaccine and autism. Find out how it all got started. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "vaccines-and-the-autism-myth-part-1"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/vaccines-and-the-autism-myth-part-2/", "id": "HGb9m1dbNdM", "title": "Vaccines and the autism myth - part 2", "kind": "Video", "description": "The infamous Wakefield study kickstarted the Autism Myth, but many studies have since shown that there is no link between the MMR Vaccine and autism. Find out how it all got started. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "vaccines-and-the-autism-myth-part-2"}, {"path": "khan/science/health-and-medicine/infectious-diseases/influenza/flu-surveillance/", "id": "5ui43_O0RVQ", "title": "Flu surveillance", "kind": "Video", "description": "Find out how many people get hospitalized and die from the flu each year, and learn how we can use the internet to keep tabs on the flu! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "flu-surveillance"}], "in_knowledge_map": false, "description": "Most people have had the flu virus at least once in their lives, and it\u2019s usually not a pleasant experience\u2026 Fight back with some good information! Learn about typical flu symptoms (and how tell it apart from the cold), and how the flu virus invades your cells to cause disease. Finally, learn how flu vaccines may help prevent you from getting sick, and how we can test and treat the flu just in case you get really ill. Stay healthy, my friends!", "node_slug": "influenza", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/infectious-diseases/influenza", "extended_slug": "science/health-and-medicine/infectious-diseases/influenza", "kind": "Topic", "slug": "influenza"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/infectious-diseases/polio/", "id": "polio", "hide": false, "title": "Polio", "child_data": [{"kind": "Article", "id": "x0f394085"}, {"kind": "Video", "id": "x16765d40"}, {"kind": "Video", "id": "xe1621b13"}, {"kind": "Video", "id": "x03a87b98"}, {"kind": "Video", "id": "x460001b1"}, {"kind": "Video", "id": "x886a2ecd"}], "children": [{"path": "khan/science/health-and-medicine/infectious-diseases/polio/what-is-polio/", "id": "K9eZTm4TL2c", "title": "What is polio?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-polio"}, {"path": "khan/science/health-and-medicine/infectious-diseases/polio/poliomyelitis-pathophysiology/", "id": "aBBTiPsYUVA", "title": "Poliomyelitis pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "poliomyelitis-pathophysiology"}, {"path": "khan/science/health-and-medicine/infectious-diseases/polio/polio-epidemiology/", "id": "qGNqyXIQaqQ", "title": "Polio epidemiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "polio-epidemiology"}, {"path": "khan/science/health-and-medicine/infectious-diseases/polio/poliomyelitis-diagnosis-and-treatment/", "id": "Y6ENEA7FzvU", "title": "Poliomyelitis diagnosis and treatment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "poliomyelitis-diagnosis-and-treatment"}, {"path": "khan/science/health-and-medicine/infectious-diseases/polio/polio-vaccinations/", "id": "Ovype5DUI04", "title": "Polio vaccinations", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "polio-vaccinations"}], "in_knowledge_map": false, "description": "", "node_slug": "polio", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/infectious-diseases/polio", "extended_slug": "science/health-and-medicine/infectious-diseases/polio", "kind": "Topic", "slug": "polio"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/", "id": "sexually-transmitted-diseases", "hide": false, "title": "Sexually transmitted diseases", "child_data": [{"kind": "Article", "id": "x4c5154f0"}, {"kind": "Video", "id": "x9255c7d0"}, {"kind": "Video", "id": "xfaab0d9a"}, {"kind": "Video", "id": "x7548632f"}, {"kind": "Video", "id": "x3137e568"}, {"kind": "Video", "id": "x0d776d10"}, {"kind": "Video", "id": "x8505c46b"}, {"kind": "Video", "id": "x6a71a329"}, {"kind": "Video", "id": "xca817718"}, {"kind": "Video", "id": "x9e98e97f"}, {"kind": "Video", "id": "x671b2f60"}, {"kind": "Video", "id": "x7d92d25e"}, {"kind": "Video", "id": "x76c8aa44"}, {"kind": "Video", "id": "x8b6a8061"}, {"kind": "Video", "id": "x460f8b7c"}, {"kind": "Video", "id": "xe8777d89"}, {"kind": "Video", "id": "x9c840f5e"}, {"kind": "Video", "id": "x77477619"}], "children": [{"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-is-gonorrhea/", "id": "AYeVIV-TxRk", "title": "What is gonorrhea?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-gonorrhea"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/pathophysiology-diagnosis-treatment-and-prevention-of-gonorrhea/", "id": "6gV_k7ACbY8", "title": "Pathophysiology, diagnosis, treatment, and prevention of gonorrhea", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pathophysiology-diagnosis-treatment-and-prevention-of-gonorrhea"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-is-chlamydia/", "id": "NDXHVKOg8BQ", "title": "What is chlamydia?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-chlamydia"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/pathophysiology-of-chlamydia/", "id": "qKe9sZQPV-Y", "title": "Pathophysiology of chlamydia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pathophysiology-of-chlamydia"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/diagnosis-treatment-and-prevention-of-chlamydia/", "id": "dfd0l10gPPY", "title": "Diagnosis, treatment, and prevention of chlamydia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-treatment-and-prevention-of-chlamydia"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-is-syphilis/", "id": "IE9hAzVAGeY", "title": "What is syphilis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-syphilis"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-is-tertiary-syphilis/", "id": "CvO0a7suxmY", "title": "What is tertiary syphilis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-tertiary-syphilis"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-is-congenital-syphilis/", "id": "h7-OynSK2x0", "title": "What is congenital syphilis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-congenital-syphilis"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/diagnosis-treatment-and-prevention-of-syphilis/", "id": "T_c343e0msA", "title": "Diagnosis, treatment, and prevention of syphilis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-treatment-and-prevention-of-syphilis"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-is-chancroid/", "id": "I1rULaaHZ6M", "title": "What is chancroid?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-chancroid"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-is-trichomoniasis/", "id": "yk0P7IpSiIg", "title": "What is trichomoniasis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-trichomoniasis"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-is-herpes/", "id": "qtbb4YBJbJM", "title": "What is herpes?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-herpes"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/pathophysiology-of-herpes/", "id": "RGMEhaeXlUw", "title": "Pathophysiology of herpes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pathophysiology-of-herpes"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-is-neonatal-herpes/", "id": "-8cCBEFlOyw", "title": "What is neonatal herpes?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-neonatal-herpes"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/diagnosis-treatment-and-prevention-of-herpes/", "id": "MFMutlhgfzI", "title": "Diagnosis, treatment, and prevention of herpes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-treatment-and-prevention-of-herpes"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-are-warts/", "id": "QN231qRvkr0", "title": "What are warts?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-are-warts"}, {"path": "khan/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases/what-is-bacterial-vaginosis/", "id": "RGLGy6r423s", "title": "What is bacterial vaginosis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-bacterial-vaginosis"}], "in_knowledge_map": false, "description": "", "node_slug": "sexually-transmitted-diseases", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases", "extended_slug": "science/health-and-medicine/infectious-diseases/sexually-transmitted-diseases", "kind": "Topic", "slug": "sexually-transmitted-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/", "id": "hiv-and-aids", "hide": false, "title": "HIV and AIDS", "child_data": [{"kind": "Article", "id": "x0de74aaf"}, {"kind": "Video", "id": "x5fbeb2c4"}, {"kind": "Video", "id": "x63a339c7"}, {"kind": "Video", "id": "xd70d0f46"}, {"kind": "Video", "id": "xd59cbaec"}, {"kind": "Video", "id": "x1d3d8473"}, {"kind": "Video", "id": "xcb85bfad"}, {"kind": "Video", "id": "xe5ffe7f4"}, {"kind": "Video", "id": "x3c60e7dc"}, {"kind": "Video", "id": "xc6f21981"}, {"kind": "Video", "id": "x25e18323"}, {"kind": "Video", "id": "xcf5b610e"}], "children": [{"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/what-is-hiv-and-aids/", "id": "17pfZUlAqow", "title": "What is HIV and AIDS?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-hiv-and-aids"}, {"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/transmission-of-hiv/", "id": "WJUcZPqgEXU", "title": "Transmission of HIV", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "transmission-of-hiv"}, {"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/how-hiv-infects-us-mucous-membranes-dendritic-cells-and-lymph-nodes/", "id": "ZroXIBg8keA", "title": "How HIV infects us: Mucous membranes, dendritic cells, and lymph nodes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "how-hiv-infects-us-mucous-membranes-dendritic-cells-and-lymph-nodes"}, {"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/how-hiv-infects-us-cd4-t-helper-lymphocyte-infection/", "id": "Zi4Fqc8Fkws", "title": "How HIV infects us: CD4 (T-helper) lymphocyte infection", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "how-hiv-infects-us-cd4-t-helper-lymphocyte-infection"}, {"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/how-hiv-kills-so-many-cd4-t-cells/", "id": "8gnpnUFNloo", "title": "How HIV kills so many CD4 T cells", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "how-hiv-kills-so-many-cd4-t-cells"}, {"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/diagnosing-hiv-concepts-and-tests/", "id": "3CjCAeGhtHA", "title": "Diagnosing HIV - Concepts and tests", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-hiv-concepts-and-tests"}, {"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/treating-hiv-antiretroviral-drugs/", "id": "GR9d9wrOl5E", "title": "Treating HIV: Antiretroviral drugs", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treating-hiv-antiretroviral-drugs"}, {"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/haart-treatment-for-hiv-who-what-why-when-and-how/", "id": "e85nerRGfWw", "title": "HAART treatment for HIV - Who, what, why, when, and how", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "haart-treatment-for-hiv-who-what-why-when-and-how"}, {"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/defining-aids-and-aids-defining-illnesses-bumper/", "id": "OZ9IP0xeQho", "title": "Defining AIDS and AIDS defining illnesses", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "defining-aids-and-aids-defining-illnesses-bumper"}, {"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/immune-reconstitution-inflammatory-syndrome-iris-in-aids/", "id": "p5RIcbLBTQQ", "title": "Immune reconstitution inflammatory syndrome (IRIS) in AIDS", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "immune-reconstitution-inflammatory-syndrome-iris-in-aids"}, {"path": "khan/science/health-and-medicine/infectious-diseases/hiv-and-aids/preventing-an-hiv-infection/", "id": "WDdF9ArqklA", "title": "Preventing an HIV infection", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preventing-an-hiv-infection"}], "in_knowledge_map": false, "description": "", "node_slug": "hiv-and-aids", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/infectious-diseases/hiv-and-aids", "extended_slug": "science/health-and-medicine/infectious-diseases/hiv-and-aids", "kind": "Topic", "slug": "hiv-and-aids"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/infectious-diseases/malaria/", "id": "malaria", "hide": false, "title": "Malaria", "child_data": [{"kind": "Article", "id": "xaa52961d"}, {"kind": "Video", "id": "xa29728d0"}, {"kind": "Video", "id": "xec1ca366"}, {"kind": "Video", "id": "x317931f6"}, {"kind": "Video", "id": "xe6b792ee"}], "children": [{"path": "khan/science/health-and-medicine/infectious-diseases/malaria/the-basics-of-malaria/", "id": "NtvJirrHhZM", "title": "The basics of malaria", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-basics-of-malaria"}, {"path": "khan/science/health-and-medicine/infectious-diseases/malaria/diagnosing-malaria/", "id": "gezAvbjMiBU", "title": "Diagnosing malaria", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-malaria"}, {"path": "khan/science/health-and-medicine/infectious-diseases/malaria/treatment-of-malaria/", "id": "6vDwG_rz_PU", "title": "Treatment of malaria", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatment-of-malaria"}, {"path": "khan/science/health-and-medicine/infectious-diseases/malaria/preventing-malaria/", "id": "INmIcOPKo_M", "title": "Preventing malaria", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preventing-malaria"}], "in_knowledge_map": false, "description": "", "node_slug": "malaria", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/infectious-diseases/malaria", "extended_slug": "science/health-and-medicine/infectious-diseases/malaria", "kind": "Topic", "slug": "malaria"}], "in_knowledge_map": false, "description": "There's an intricate dance between humans and viruses, bacteria, molds, and even tiny worms! They want to survive and replicate just like humans do... and this is why they cause infections.", "node_slug": "infectious-diseases", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/infectious-diseases", "extended_slug": "science/health-and-medicine/infectious-diseases", "kind": "Topic", "slug": "infectious-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/lab-values/", "id": "lab-values", "hide": false, "title": "Lab values and concentrations", "child_data": [{"kind": "Video", "id": "1058493149"}, {"kind": "Video", "id": "1228258123"}, {"kind": "Video", "id": "1058438251"}, {"kind": "Video", "id": "1058207911"}, {"kind": "Video", "id": "364061"}, {"kind": "Video", "id": "1058257462"}, {"kind": "Video", "id": "1058477253"}, {"kind": "Video", "id": "1058451242"}, {"kind": "Video", "id": "1057946910"}, {"kind": "Video", "id": "1058446306"}], "children": [{"path": "khan/science/health-and-medicine/lab-values/introduction-to-lab-values-and-normal-ranges/", "id": "_mGszRbve9s", "title": "Introduction to lab values and normal ranges", "kind": "Video", "description": "Find out how health professionals use short-hand for labs and the meaning of normal ranges. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "introduction-to-lab-values-and-normal-ranges"}, {"path": "khan/science/health-and-medicine/lab-values/what-s-inside-of-blood/", "id": "5MOn8X-tyFw", "title": "What's inside of blood?", "kind": "Video", "description": "Spin down your blood and find out what it's made up of. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-s-inside-of-blood"}, {"path": "khan/science/health-and-medicine/lab-values/units-for-common-medical-lab-values/", "id": "OLWvKdV4PHg", "title": "Units for common medical lab values", "kind": "Video", "description": "Figure out how to interpret the units in common medical labs including the CBC, Chem 10, and LFTs. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "units-for-common-medical-lab-values"}, {"path": "khan/science/health-and-medicine/lab-values/what-is-an-equivalent/", "id": "If4Ar9lnB_4", "title": "What is an equivalent?", "kind": "Video", "description": "Figure out how to calculate an equivalent and how it relates to a mole. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-an-equivalent"}, {"path": "khan/science/health-and-medicine/lab-values/the-mole-and-avogadro-s-number/", "id": "AsqEkF7hcII", "title": "The mole and Avogadro's number", "kind": "Video", "description": "Introduction to the idea of a mole as a number (vs. an animal).", "slug": "the-mole-and-avogadro-s-number"}, {"path": "khan/science/health-and-medicine/lab-values/molarity-vs-molality/", "id": "4VltXjR64SU", "title": "Molarity vs. molality", "kind": "Video", "description": "Learn how molarity and molality differ! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "molarity-vs-molality"}, {"path": "khan/science/health-and-medicine/lab-values/molarity-vs-osmolarity/", "id": "_saunfB-wCQ", "title": "Molarity vs. osmolarity", "kind": "Video", "description": "Learn about osmoles and figure out how to calculate osmolarity really easily. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "molarity-vs-osmolarity"}, {"path": "khan/science/health-and-medicine/lab-values/calculate-your-own-osmolarity/", "id": "H-qREcJqUhY", "title": "Calculate your own osmolarity", "kind": "Video", "description": "Learn how to use three lab values (Sodium, glucose, and BUN) to approximate your plasma osmolarity. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "calculate-your-own-osmolarity"}, {"path": "khan/science/health-and-medicine/lab-values/molarity-molality-osmolarity-osmolality-and-tonicity-what-s-the-difference/", "id": "o_Bb43LApog", "title": "Molarity, molality, osmolarity, osmolality, and tonicity - what's the difference?", "kind": "Video", "description": "See how each of these terms tells us something different about a solution. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "molarity-molality-osmolarity-osmolality-and-tonicity-what-s-the-difference"}, {"path": "khan/science/health-and-medicine/lab-values/tonicity-comparing-2-solutions/", "id": "VsW6NXZIUCQ", "title": "Tonicity - comparing 2 solutions", "kind": "Video", "description": "Find out how tonicity is determined by ions that don't move across membranes and how it affects the movement of water. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "tonicity-comparing-2-solutions"}], "in_knowledge_map": false, "description": "Ever wonder about your lab values and what they mean? Lab values measure amounts of electrolytes or cells in your blood and occasionally tell you about how hormones and enzymes are working! Dive deeper and get a good understanding of concentrations as well!", "node_slug": "lab-values", "render_type": "UncuratedTutorial", "topic_page_url": "/science/health-and-medicine/lab-values", "extended_slug": "science/health-and-medicine/lab-values", "kind": "Topic", "slug": "lab-values"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/health-and-medicine/current-issues-in-health-and-medicine/", "id": "current-issues-in-health-and-medicine", "hide": false, "title": "Current events in health and medicine", "child_data": [{"kind": "Topic", "id": "x11ec1443"}, {"kind": "Topic", "id": "x5c04b9a6"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/health-and-medicine/current-issues-in-health-and-medicine/ebola-outbreak/", "id": "ebola-outbreak", "hide": false, "title": "Ebola outbreak", "child_data": [{"kind": "Article", "id": "xf164ec56"}, {"kind": "Video", "id": "x9589d8a3"}, {"kind": "Video", "id": "x616250fb"}, {"kind": "Video", "id": "x075a8065"}, {"kind": "Scratchpad", "id": "6131690633428992"}, {"kind": "Exercise", "id": "x7366fa25"}], "children": [{"path": "khan/science/health-and-medicine/current-issues-in-health-and-medicine/ebola-outbreak/understanding-the-ebola-virus-outbreak/", "id": "xYoQQCO15GE", "title": "Understanding the Ebola virus outbreak", "kind": "Video", "description": "Dr. Rishi Desai is a pediatric infectious disease physician and former epidemiologist with the Centers for Disease Control and Prevention (CDC)", "slug": "understanding-the-ebola-virus-outbreak"}, {"path": "khan/science/health-and-medicine/current-issues-in-health-and-medicine/ebola-outbreak/understanding-r-nought/", "id": "jKUGZvW99os", "title": "Understanding R nought", "kind": "Video", "description": "Dr. Rishi Desai is a pediatric infectious disease physician and former epidemiologist with the Centers for Disease Control and Prevention (CDC)", "slug": "understanding-r-nought"}, {"path": "khan/science/health-and-medicine/current-issues-in-health-and-medicine/ebola-outbreak/r-nought-and-vaccine-coverage/", "id": "sMA116kzyK4", "title": "R nought and vaccine coverage", "kind": "Video", "description": "Dr. Rishi Desai is a pediatric infectious disease physician and former epidemiologist with the Centers for Disease Control and Prevention (CDC)", "slug": "r-nought-and-vaccine-coverage"}, {"path": "khan/science/health-and-medicine/current-issues-in-health-and-medicine/ebola-outbreak/ebola-quiz/", "id": "ebola-quiz", "title": "Ebola quiz", "description": "Test how much you know about Ebola!", "slug": "ebola-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn all about the Ebola outbreak occurring in Western Africa. Dr. Rishi Desai is a pediatric infectious disease physician and former epidemiologist with the Centers for Disease Control and Prevention (CDC)", "node_slug": "ebola-outbreak", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/current-issues-in-health-and-medicine/ebola-outbreak", "extended_slug": "science/health-and-medicine/current-issues-in-health-and-medicine/ebola-outbreak", "kind": "Topic", "slug": "ebola-outbreak"}], "in_knowledge_map": false, "description": "Learn more about some of the current issues in health and medicine. Dr. Rishi Desai is a pediatric infectious disease physician and former epidemiologist with the Centers for Disease Control and Prevention (CDC)", "node_slug": "current-issues-in-health-and-medicine", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/current-issues-in-health-and-medicine", "extended_slug": "science/health-and-medicine/current-issues-in-health-and-medicine", "kind": "Topic", "slug": "current-issues-in-health-and-medicine"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/health-care-system/", "id": "health-care-system", "hide": false, "title": "Health care system", "child_data": [{"kind": "Video", "id": "289594304"}, {"kind": "Video", "id": "289594306"}, {"kind": "Video", "id": "289594301"}, {"kind": "Video", "id": "348994349"}, {"kind": "Video", "id": "348974630"}, {"kind": "Video", "id": "348973599"}], "children": [{"path": "khan/science/health-and-medicine/health-care-system/blue-cross-and-blue-shield/", "id": "S9xdJgPWO-w", "title": "Blue Cross and Blue Shield", "kind": "Video", "description": "Sal and Dr. Baker talk a bit about Blue Cross and Blue Shield", "slug": "blue-cross-and-blue-shield"}, {"path": "khan/science/health-and-medicine/health-care-system/conversation-about-drug-pricing/", "id": "8t-Un7yH99g", "title": "Conversation about drug pricing", "kind": "Video", "description": "Dr. Laurence Baker talks to Sal about how drug prices are set", "slug": "conversation-about-drug-pricing"}, {"path": "khan/science/health-and-medicine/health-care-system/health-care-costs-in-us-vs-europe/", "id": "6YU9HVS2GT0", "title": "Health care costs in US vs Europe", "kind": "Video", "description": "A discussion about US health care costs", "slug": "health-care-costs-in-us-vs-europe"}, {"path": "khan/science/health-and-medicine/health-care-system/healthcare-system-overview/", "id": "LMHxxvbzFqc", "title": "Healthcare system overview", "kind": "Video", "description": "The different roles in the healthcare system", "slug": "healthcare-system-overview"}, {"path": "khan/science/health-and-medicine/health-care-system/paying-doctors/", "id": "4J-dRA3MGc8", "title": "Paying doctors", "kind": "Video", "description": "Basics of how doctors get paid", "slug": "paying-doctors"}, {"path": "khan/science/health-and-medicine/health-care-system/medicare-overview/", "id": "VpLKdKkpg68", "title": "Medicare overview", "kind": "Video", "description": "Sal talks with Professor Laurence Baker of Stanford Medical School", "slug": "medicare-overview"}], "in_knowledge_map": false, "description": "The health care system in the United States is rapidly changing. To better understand these changes, we review the health care insurance, drug pricing, physician compensation, and much more! join us as we explore the basics about the Health Care system in the US, including a comparison with European healthcare.", "node_slug": "health-care-system", "render_type": "UncuratedTutorial", "topic_page_url": "/science/health-and-medicine/health-care-system", "extended_slug": "science/health-and-medicine/health-care-system", "kind": "Topic", "slug": "health-care-system"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/healthcare-misc/", "id": "healthcare-misc", "hide": false, "title": "Miscellaneous", "child_data": [{"kind": "Video", "id": "184533578"}, {"kind": "Video", "id": "53625899"}, {"kind": "Video", "id": "53625898"}, {"kind": "Video", "id": "56245182"}, {"kind": "Video", "id": "206047808"}, {"kind": "Video", "id": "206047807"}, {"kind": "Video", "id": "206047806"}, {"kind": "Video", "id": "206047805"}, {"kind": "Video", "id": "x2d026b9c"}, {"kind": "Video", "id": "1036301051"}, {"kind": "Video", "id": "1036124812"}, {"kind": "Video", "id": "1036256248"}, {"kind": "Video", "id": "209595589"}, {"kind": "Video", "id": "209595591"}, {"kind": "Video", "id": "209595590"}, {"kind": "Video", "id": "244040667"}, {"kind": "Video", "id": "244040666"}, {"kind": "Video", "id": "221376883"}, {"kind": "Video", "id": "244040668"}, {"kind": "Video", "id": "244040665"}, {"kind": "Video", "id": "289609350"}, {"kind": "Video", "id": "289594305"}], "children": [{"path": "khan/science/health-and-medicine/healthcare-misc/heart-disease-and-heart-attacks/", "id": "vYnreB1duro", "title": "Heart disease and heart attacks", "kind": "Video", "description": "Basics of heart disease, heart attacks, heart failure, angina, cardiac arrest. Special thanks to Edward J Perper, MD for help in clarifying certain aspects of this video. Licensed under CC-BY-SA", "slug": "heart-disease-and-heart-attacks"}, {"path": "khan/science/health-and-medicine/healthcare-misc/stenosis-ischemia-and-heart-failure/", "id": "3858MaULDdI", "title": "Stenosis, ischemia and heart failure", "kind": "Video", "description": "Clarifying a bunch of medical terms around heart disease", "slug": "stenosis-ischemia-and-heart-failure"}, {"path": "khan/science/health-and-medicine/healthcare-misc/thrombo-emboli-and-thromboembolisms/", "id": "h0207xMD6b8", "title": "Thrombo-emboli and thromboembolisms", "kind": "Video", "description": "Clarifying difference between a thrombus and an embolus (and between thrombosis and embolism)", "slug": "thrombo-emboli-and-thromboembolisms"}, {"path": "khan/science/health-and-medicine/healthcare-misc/strokes/", "id": "xbyfeEW56Nc", "title": "Strokes", "kind": "Video", "description": "Basics of strokes", "slug": "strokes"}, {"path": "khan/science/health-and-medicine/healthcare-misc/hyperplasia-in-colon-tissue/", "id": "C0frzmxc5KU", "title": "Hyperplasia in colon tissue", "kind": "Video", "description": "Dr. Andy Connolly from Stanford Medical School shows Sal what hyperplasia in colon tissue looks like", "slug": "hyperplasia-in-colon-tissue"}, {"path": "khan/science/health-and-medicine/healthcare-misc/normal-colon-tissue/", "id": "fif5ghe8JM0", "title": "Normal colon tissue", "kind": "Video", "description": "Dr. Andy Connolly from Stanford Medical School introduces Sal to what normal colon tissue looks like", "slug": "normal-colon-tissue"}, {"path": "khan/science/health-and-medicine/healthcare-misc/colon-dysplasia/", "id": "CGrbnripinU", "title": "Colon dysplasia", "kind": "Video", "description": "Dr. Andy Connolly shows Sal what cancerous colon tissue looks like", "slug": "colon-dysplasia"}, {"path": "khan/science/health-and-medicine/healthcare-misc/cancerous-colon-tissue/", "id": "KyJs9H0vzTM", "title": "Cancerous colon tissue", "kind": "Video", "description": "Dr. Andy Connolly of Stanford Medical School shows us what cancerous colon tissue looks like", "slug": "cancerous-colon-tissue"}, {"path": "khan/science/health-and-medicine/healthcare-misc/als-ice-bucket-challenge/", "id": "tKDET9t8VTI", "title": "ALS - Amyotrophic lateral sclerosis", "kind": "Video", "description": "Sal explains the disease ALS, amyotrophic lateral sclerosis, and takes the \"ice bucket challenge.\"", "slug": "als-ice-bucket-challenge"}, {"path": "khan/science/health-and-medicine/healthcare-misc/low-salt-diet/", "id": "54c_oPpTTP8", "title": "Low salt diet", "kind": "Video", "description": "Figure out the difference between \"salt\" and \"sodium\" and how much salt is recommended on a low sodium diet. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "low-salt-diet"}, {"path": "khan/science/health-and-medicine/healthcare-misc/calculate-your-own-body-mass-index/", "id": "5RXRr8PKunk", "title": "Calculate your own body mass index", "kind": "Video", "description": "Find out how simple it is to calculate your BMI and the common BMI categories. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "calculate-your-own-body-mass-index"}, {"path": "khan/science/health-and-medicine/healthcare-misc/spotting-salty-foods/", "id": "O3A47Il5h1A", "title": "Spotting salty foods", "kind": "Video", "description": "Find out how much sodium is in some common foods and how you can maintain a low sodium diet. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "spotting-salty-foods"}, {"path": "khan/science/health-and-medicine/healthcare-misc/adequacy-of-the-lateral-cervical-spine-x-ray/", "id": "cbkTTluHaTw", "title": "Adequacy of the lateral cervical spine X-ray", "kind": "Video", "description": "Dr. Mahadevan from Stanford School of Medicine explains adequacy for lateral cervical (neck) x-rays", "slug": "adequacy-of-the-lateral-cervical-spine-x-ray"}, {"path": "khan/science/health-and-medicine/healthcare-misc/assessing-alignment-of-the-lateral-cervical-spine-neck-x-ray/", "id": "PV5u5xskBKM", "title": "Assessing alignment of the lateral cervical spine (neck) X-ray", "kind": "Video", "description": "Dr. Mahadevan of Stanford Medical School shows Sal what misalignment in the neck could look like in an X-ray", "slug": "assessing-alignment-of-the-lateral-cervical-spine-neck-x-ray"}, {"path": "khan/science/health-and-medicine/healthcare-misc/cervical-spine-protection-in-airway-management-not-a-substitute-for-formal-training/", "id": "DJY89_jC_ZY", "title": "Cervical spine protection in airway management (not a substitute for formal training)", "kind": "Video", "description": "Cervical Spine Protection in Airway Management. This is for education only. It is not a substitute for formal training or licensure. Every effort has been made in preparing this video to provide accurate and up-to-date information which is in accord accepted standards and practice at the time of production. We make no warranties on the information contained in the video because clinical standards are constantly changing through research and regulation. We disclaim all liability for direct or consequential damages resulting from the use of material contained in this video.", "slug": "cervical-spine-protection-in-airway-management-not-a-substitute-for-formal-training"}, {"path": "khan/science/health-and-medicine/healthcare-misc/precocious-puberty/", "id": "XhYQYVQq6K0", "title": "Precocious puberty", "kind": "Video", "description": "At Stanford Medical School with Morgan Theis talking to Dr. Laura Bachrach talking about precocious puberty", "slug": "precocious-puberty"}, {"path": "khan/science/health-and-medicine/healthcare-misc/childhood-growth/", "id": "gF0aA-si89Y", "title": "Childhood growth", "kind": "Video", "description": "Sal talks with Dr. Laura Bachrach about childhood growth", "slug": "childhood-growth"}, {"path": "khan/science/health-and-medicine/healthcare-misc/intro-to-the-endocrine-system/", "id": "f_Z1zsR9lFM", "title": "Intro to the endocrine system", "kind": "Video", "description": "Basic overview of hormones and the endocrine system", "slug": "intro-to-the-endocrine-system"}, {"path": "khan/science/health-and-medicine/healthcare-misc/bacterial-meningitis/", "id": "CnXuSCaCNBo", "title": "Bacterial meningitis", "kind": "Video", "description": "Dr. Charles Prober discusses prudent prescribing of antibiotics in the context of bacterial meningitis with 4th year medical student Morgan Theis", "slug": "bacterial-meningitis"}, {"path": "khan/science/health-and-medicine/healthcare-misc/ritual-of-the-bedside-exam/", "id": "w2QVg9mezcY", "title": "Ritual of the bedside exam", "kind": "Video", "description": "Dr. Abraham Verghese explains the ritual of the bedside exam", "slug": "ritual-of-the-bedside-exam"}, {"path": "khan/science/health-and-medicine/healthcare-misc/systemic-thinking-about-cancer/", "id": "7zk0ubr_lzo", "title": "Systemic thinking about cancer", "kind": "Video", "description": "Dr. David Agus discusses thinking systemically about cancer and other things", "slug": "systemic-thinking-about-cancer"}, {"path": "khan/science/health-and-medicine/healthcare-misc/inflammation/", "id": "GZ6I3T1RAnQ", "title": "Inflammation", "kind": "Video", "description": "Dr. David Agus talks about inflammation (while Sal repeatedly misspells it with one \"m\")", "slug": "inflammation"}], "in_knowledge_map": false, "description": "Enjoy!", "node_slug": "healthcare-misc", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/healthcare-misc", "extended_slug": "science/health-and-medicine/healthcare-misc", "kind": "Topic", "slug": "healthcare-misc"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/", "id": "gastrointestinal-system-diseases", "hide": false, "title": "Gastrointestinal system diseases", "child_data": [{"kind": "Topic", "id": "xe04371ad"}, {"kind": "Topic", "id": "x9c22e34d"}, {"kind": "Topic", "id": "x9e9a1f0c"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis/", "id": "gastroenteritis", "hide": false, "title": "Gastroenteritis", "child_data": [{"kind": "Article", "id": "x01190d77"}, {"kind": "Video", "id": "xc1be470d"}, {"kind": "Video", "id": "x7a28537c"}, {"kind": "Video", "id": "x98f9880a"}, {"kind": "Video", "id": "x5e88475d"}, {"kind": "Video", "id": "x86390a13"}, {"kind": "Video", "id": "x20e01dd7"}, {"kind": "Video", "id": "xc63bcf0b"}, {"kind": "Video", "id": "x3b5bab57"}], "children": [{"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis/what-is-gastroenteritis/", "id": "pIDmePznLBo", "title": "What is gastroenteritis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-gastroenteritis"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis/what-is-staphylococcal-enteritis/", "id": "9bfDEsz7eSM", "title": "What is staphylococcal enteritis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-staphylococcal-enteritis"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis/what-is-viral-gastroenteritis/", "id": "2Xq2fZCs2oU", "title": "What is viral gastroenteritis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-viral-gastroenteritis"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis/what-is-cholera/", "id": "kXf8MkpALrc", "title": "What is cholera?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-cholera"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis/what-is-campylobacteriosis/", "id": "HsyrOicubso", "title": "What is campylobacteriosis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-campylobacteriosis"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis/what-is-shigellosis/", "id": "Ny0b9xO2sgY", "title": "What is shigellosis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-shigellosis"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis/what-is-salmonella-poisoning/", "id": "3UAJS9jzyV4", "title": "What is salmonella poisoning?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-salmonella-poisoning"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis/what-is-travelers-diarrhea/", "id": "rTKdqvOZcQ4", "title": "What is traveler's diarrhea?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-travelers-diarrhea"}], "in_knowledge_map": false, "description": "", "node_slug": "gastroenteritis", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis", "extended_slug": "science/health-and-medicine/gastrointestinal-system-diseases/gastroenteritis", "kind": "Topic", "slug": "gastroenteritis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/inflammatory-bowel-disease/", "id": "inflammatory-bowel-disease", "hide": false, "title": "Inflammatory bowel disease", "child_data": [{"kind": "Video", "id": "xd3bea895"}, {"kind": "Video", "id": "xe10e889c"}, {"kind": "Video", "id": "x3e477ee8"}, {"kind": "Video", "id": "x77832db1"}], "children": [{"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/inflammatory-bowel-disease/inflammatory-bowel-disease-vs-irritable-bowel-disease/", "id": "FaKB7Y2gL9Y", "title": "Inflammatory bowel disease vs irritable bowel disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "inflammatory-bowel-disease-vs-irritable-bowel-disease"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/inflammatory-bowel-disease/inflammatory-bowel-disease-epidemiology-pathology/", "id": "Ueqs7pl5OAY", "title": "Inflammatory bowel disease: Epidemiology & pathology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "inflammatory-bowel-disease-epidemiology-pathology"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/inflammatory-bowel-disease/inflammatory-bowel-disease-diagnosis/", "id": "QH1g-pVS0ZY", "title": "Inflammatory bowel disease: Diagnosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "inflammatory-bowel-disease-diagnosis"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/inflammatory-bowel-disease/inflammatory-bowel-disease-treatment/", "id": "a67MCzUjUXA", "title": "Inflammatory bowel disease: Treatment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "inflammatory-bowel-disease-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "inflammatory-bowel-disease", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/gastrointestinal-system-diseases/inflammatory-bowel-disease", "extended_slug": "science/health-and-medicine/gastrointestinal-system-diseases/inflammatory-bowel-disease", "kind": "Topic", "slug": "inflammatory-bowel-disease"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/celiac-disease/", "id": "celiac-disease", "hide": false, "title": "Celiac disease", "child_data": [{"kind": "Video", "id": "x2e00069c"}, {"kind": "Video", "id": "x5521b979"}], "children": [{"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/celiac-disease/what-is-gluten/", "id": "25mxf_xUqDQ", "title": "What is gluten?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-gluten"}, {"path": "khan/science/health-and-medicine/gastrointestinal-system-diseases/celiac-disease/what-is-celiac-disease/", "id": "gZeliSjhkpg", "title": "What is celiac disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-celiac-disease"}], "in_knowledge_map": false, "description": "", "node_slug": "celiac-disease", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/gastrointestinal-system-diseases/celiac-disease", "extended_slug": "science/health-and-medicine/gastrointestinal-system-diseases/celiac-disease", "kind": "Topic", "slug": "celiac-disease"}], "in_knowledge_map": false, "description": "", "node_slug": "gastrointestinal-system-diseases", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/gastrointestinal-system-diseases", "extended_slug": "science/health-and-medicine/gastrointestinal-system-diseases", "kind": "Topic", "slug": "gastrointestinal-system-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/health-and-medicine/mental-health/", "id": "mental-health", "hide": false, "title": "Mental health", "child_data": [{"kind": "Topic", "id": "xd92aee87"}, {"kind": "Topic", "id": "xf1b830fc"}, {"kind": "Topic", "id": "x0514a9f3"}, {"kind": "Topic", "id": "x02e601bc"}, {"kind": "Topic", "id": "x54130f4f"}, {"kind": "Topic", "id": "x4c0b5c31"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/", "id": "drug-abuse-and-drug-addictions", "hide": false, "title": "Drug abuse and drug addictions", "child_data": [{"kind": "Article", "id": "x670c0ec1"}, {"kind": "Video", "id": "x208ae23e"}, {"kind": "Video", "id": "x02913912"}, {"kind": "Video", "id": "x9fcc3ef2"}, {"kind": "Video", "id": "x6118b7f7"}, {"kind": "Video", "id": "xba154a49"}, {"kind": "Video", "id": "xeae6721c"}, {"kind": "Video", "id": "xe7444058"}, {"kind": "Video", "id": "x412842f8"}, {"kind": "Video", "id": "xc55ff290"}, {"kind": "Video", "id": "xbf60eaaa"}, {"kind": "Video", "id": "x8f1aad59"}, {"kind": "Video", "id": "xf9d9325a"}, {"kind": "Video", "id": "x103fbff6"}, {"kind": "Video", "id": "x94a2a9c2"}, {"kind": "Video", "id": "x98131611"}], "children": [{"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/overview-of-psychoactive-drugs/", "id": "icD3l5bhhKY", "title": "Overview of psychoactive drugs", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "overview-of-psychoactive-drugs"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/psychoactive-drugs-depressants-and-opiates/", "id": "dOlkogaWF3M", "title": "Psychoactive drugs: Depressants and opiates", "kind": "Video", "slug": "psychoactive-drugs-depressants-and-opiates"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/psychoactive-drugs-stimulants/", "id": "1Smz0zwAELQ", "title": "Psychoactive drugs: Stimulants", "kind": "Video", "slug": "psychoactive-drugs-stimulants"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/psychoactive-drugs-hallucinogens/", "id": "GUwV0gibLx8", "title": "Psychoactive drugs: Hallucinogens", "kind": "Video", "slug": "psychoactive-drugs-hallucinogens"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/routes-of-drug-entry/", "id": "dPmkIEkxXwc", "title": "Routes of drug entry", "kind": "Video", "slug": "routes-of-drug-entry"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/drug-dependence-and-homeostasis/", "id": "X4W44wJbJgk", "title": "Drug dependence and homeostasis", "kind": "Video", "slug": "drug-dependence-and-homeostasis"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/reward-pathway-in-the-brain/", "id": "YzCYuKX6zp8", "title": "Reward pathway in the brain", "kind": "Video", "slug": "reward-pathway-in-the-brain"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/tolerance-and-withdrawal/", "id": "3vKLU5_Hgco", "title": "Tolerance and withdrawal", "kind": "Video", "slug": "tolerance-and-withdrawal"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/risk-factors-for-drug-use-and-drug-abuse/", "id": "R23KUZvjg4A", "title": "Risk factors for drug use and drug abuse", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "risk-factors-for-drug-use-and-drug-abuse"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/substance-use-disorders/", "id": "LhFXw1xmaSM", "title": "Substance use disorders", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "substance-use-disorders"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/the-development-of-substance-use-why-do-people-use-legal-and-illegal-substances/", "id": "0nKP1FdSzEg", "title": "The development of substance use - Why do people use legal and illegal substances?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-development-of-substance-use-why-do-people-use-legal-and-illegal-substances"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/why-do-some-people-but-not-others-develop-substance-use-problems/", "id": "2cz2tH5vE1Q", "title": "Why do some people but not others develop substance use problems?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "why-do-some-people-but-not-others-develop-substance-use-problems"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/treatments-and-triggers-for-drug-dependence/", "id": "TK7NnXGrWfA", "title": "Treatments and triggers for drug dependence", "kind": "Video", "slug": "treatments-and-triggers-for-drug-dependence"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/how-does-substance-use-develop-into-substance-abuse/", "id": "Qw37BqzvEvw", "title": "How does substance use develop into substance abuse", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "how-does-substance-use-develop-into-substance-abuse"}, {"path": "khan/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions/drug-use-prevention-school-programming-and-protective-factors/", "id": "LunoLU3XFKc", "title": "Drug use prevention - school programming and protective factors", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "drug-use-prevention-school-programming-and-protective-factors"}], "in_knowledge_map": false, "description": "", "node_slug": "drug-abuse-and-drug-addictions", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions", "extended_slug": "science/health-and-medicine/mental-health/drug-abuse-and-drug-addictions", "kind": "Topic", "slug": "drug-abuse-and-drug-addictions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/", "id": "depression-and-related-disorders", "hide": false, "title": "Depression and related disorders", "child_data": [{"kind": "Article", "id": "x144e8037"}, {"kind": "Video", "id": "x915207a0"}, {"kind": "Video", "id": "xee5a1ef6"}, {"kind": "Video", "id": "x25a6fe6f"}, {"kind": "Video", "id": "xe2b79837"}, {"kind": "Video", "id": "xdb42e3a0"}, {"kind": "Video", "id": "xeb1f7f74"}, {"kind": "Video", "id": "xd897460e"}, {"kind": "Video", "id": "x559054e5"}, {"kind": "Video", "id": "x81ba7507"}, {"kind": "Video", "id": "xcda96635"}], "children": [{"path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/introduction-to-psychology-depression-and-major-depressive-disorder/", "id": "diVGZxXh-dg", "title": "Introduction to psychology - Depression and major depressive disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "introduction-to-psychology-depression-and-major-depressive-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/diagnosing-depression-2/", "id": "IHgoDWM9hAc", "title": "Diagnosing depression", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-depression-2"}, {"path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/introduction-to-psychology-depression-and-bipolar-disorder/", "id": "rhxsZnrA46s", "title": "Introduction to psychology - Depression and bipolar disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "introduction-to-psychology-depression-and-bipolar-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/diagnosing-bipolar-disorder/", "id": "PCOevYD9cb4", "title": "Diagnosing bipolar disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-bipolar-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/types-of-depression-and-bipolar-disorder-in-the-dsm5/", "id": "eSXZwk8axmI", "title": "Types of depression and bipolar disorder in the DSM5", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "types-of-depression-and-bipolar-disorder-in-the-dsm5"}, {"path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/biological-basis-of-depression/", "id": "QEjWLj5wAFM", "title": "Biological basis of depression", "kind": "Video", "slug": "biological-basis-of-depression"}, {"path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/risk-factors-for-bipolar-disorder/", "id": "JAg8IrTs5K0", "title": "Risk factors for bipolar disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "risk-factors-for-bipolar-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/treating-depression-with-antidepressants/", "id": "xgsbxmiPOrg", "title": "Treating depression with antidepressants", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treating-depression-with-antidepressants"}, {"path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/treatments-for-depression-psychological-therapies/", "id": "DKXAHh9PZJQ", "title": "Treatments for depression - Psychological therapies", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatments-for-depression-psychological-therapies"}, {"path": "khan/science/health-and-medicine/mental-health/depression-and-related-disorders/treatments-for-bipolar-disorder/", "id": "zJ5w4YhOyN8", "title": "Treatments for bipolar disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatments-for-bipolar-disorder"}], "in_knowledge_map": false, "description": "", "node_slug": "depression-and-related-disorders", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/mental-health/depression-and-related-disorders", "extended_slug": "science/health-and-medicine/mental-health/depression-and-related-disorders", "kind": "Topic", "slug": "depression-and-related-disorders"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/mental-health/anxiety/", "id": "anxiety", "hide": false, "title": "Anxiety", "child_data": [{"kind": "Article", "id": "xdca594af"}, {"kind": "Video", "id": "xaddea933"}, {"kind": "Video", "id": "xc6a52454"}, {"kind": "Video", "id": "xc5245b7d"}, {"kind": "Article", "id": "x431ad70f"}, {"kind": "Video", "id": "x35b6d305"}, {"kind": "Article", "id": "xc5e5e364"}, {"kind": "Video", "id": "x04a55f2e"}], "children": [{"path": "khan/science/health-and-medicine/mental-health/anxiety/generalized-anxiety-disorder/", "id": "eSM1p2vN7vg", "title": "Generalized anxiety disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "generalized-anxiety-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/anxiety/phobias/", "id": "_AuTtAkRN3w", "title": "Phobias", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "phobias"}, {"path": "khan/science/health-and-medicine/mental-health/anxiety/panic-disorder/", "id": "VmV6RlsUwO8", "title": "Panic disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "panic-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/anxiety/obsessive-compulsive-disorder/", "id": "8gX_LBv4ZD0", "title": "Obsessive compulsive disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "obsessive-compulsive-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/anxiety/post-traumatic-stress-disorder/", "id": "Q0meIMQJ73I", "title": "Post traumatic stress disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "post-traumatic-stress-disorder"}], "in_knowledge_map": false, "description": "", "node_slug": "anxiety", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/mental-health/anxiety", "extended_slug": "science/health-and-medicine/mental-health/anxiety", "kind": "Topic", "slug": "anxiety"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/mental-health/psychotic-disorders/", "id": "psychotic-disorders", "hide": false, "title": "Psychotic disorders", "child_data": [{"kind": "Article", "id": "x0246bbe8"}, {"kind": "Video", "id": "xab72c94b"}, {"kind": "Video", "id": "xbf57aaca"}, {"kind": "Video", "id": "x6299afcb"}, {"kind": "Video", "id": "x2432e6b7"}, {"kind": "Video", "id": "x20c95e2b"}, {"kind": "Video", "id": "x8d6cfc8b"}, {"kind": "Video", "id": "x51a5290e"}], "children": [{"path": "khan/science/health-and-medicine/mental-health/psychotic-disorders/psychosis/", "id": "g0LPpW6Iqzo", "title": "Psychosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "psychosis"}, {"path": "khan/science/health-and-medicine/mental-health/psychotic-disorders/schizophrenia-symptoms/", "id": "dU_rYyPGYiE", "title": "Schizophrenia symptoms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizophrenia-symptoms"}, {"path": "khan/science/health-and-medicine/mental-health/psychotic-disorders/schizophrenia-diagnosis/", "id": "te4AkzFprbI", "title": "Schizophrenia diagnosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizophrenia-diagnosis"}, {"path": "khan/science/health-and-medicine/mental-health/psychotic-disorders/schizophrenia-treatment/", "id": "stSvcwY0RWI", "title": "Schizophrenia treatment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizophrenia-treatment"}, {"path": "khan/science/health-and-medicine/mental-health/psychotic-disorders/schizoaffective-disorder/", "id": "hBBCp9RvmoQ", "title": "Schizoaffective disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizoaffective-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/psychotic-disorders/schizotypal-personality-disorder/", "id": "jBu5M0gXGos", "title": "Schizotypal personality disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizotypal-personality-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/psychotic-disorders/delusional-disorder/", "id": "YbSEybahiVA", "title": "Delusional disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "delusional-disorder"}], "in_knowledge_map": false, "description": "", "node_slug": "psychotic-disorders", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/mental-health/psychotic-disorders", "extended_slug": "science/health-and-medicine/mental-health/psychotic-disorders", "kind": "Topic", "slug": "psychotic-disorders"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/mental-health/dementia-delirium-alzheimers/", "id": "dementia-delirium-alzheimers", "hide": false, "title": "Dementia, delirium, and Alzheimer's", "child_data": [{"kind": "Article", "id": "xdc2f0f4f"}, {"kind": "Video", "id": "x9cf6de8f"}, {"kind": "Video", "id": "x413bb94d"}, {"kind": "Video", "id": "xb2c3cfd3"}, {"kind": "Video", "id": "x502e58b3"}, {"kind": "Video", "id": "x29f311e5"}, {"kind": "Video", "id": "xf9261ddc"}, {"kind": "Video", "id": "x4d822894"}, {"kind": "Video", "id": "xf1b45195"}], "children": [{"path": "khan/science/health-and-medicine/mental-health/dementia-delirium-alzheimers/what-are-dementia-and-alzheimers/", "id": "xUSpHmvW14c", "title": "What are dementia and Alzheimer's", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-are-dementia-and-alzheimers"}, {"path": "khan/science/health-and-medicine/mental-health/dementia-delirium-alzheimers/alzheimers-disease-plaques-and-tangles/", "id": "kx5LBj6P-0E", "title": "Alzheimer's disease: Plaques and tangles", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "alzheimers-disease-plaques-and-tangles"}, {"path": "khan/science/health-and-medicine/mental-health/dementia-delirium-alzheimers/other-types-of-dementia/", "id": "-DDSEQlZKsE", "title": "Other types of dementia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "other-types-of-dementia"}, {"path": "khan/science/health-and-medicine/mental-health/dementia-delirium-alzheimers/risk-factors-for-dementia/", "id": "9CzYnHVFsuk", "title": "Risk factors for dementia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "risk-factors-for-dementia"}, {"path": "khan/science/health-and-medicine/mental-health/dementia-delirium-alzheimers/stages-of-dementia-and-alzheimers-disease/", "id": "K7dP25_Sebo", "title": "Stages of dementia and Alzheimer's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "stages-of-dementia-and-alzheimers-disease"}, {"path": "khan/science/health-and-medicine/mental-health/dementia-delirium-alzheimers/diagnosis-of-dementia-and-alzheimers-disease/", "id": "LieVEfI4luw", "title": "Diagnosis of dementia and Alzheimer's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-of-dementia-and-alzheimers-disease"}, {"path": "khan/science/health-and-medicine/mental-health/dementia-delirium-alzheimers/treatment-of-dementia-and-alzheimers-disease/", "id": "durV0mnzPo4", "title": "Treatment of dementia and Alzheimer's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatment-of-dementia-and-alzheimers-disease"}, {"path": "khan/science/health-and-medicine/mental-health/dementia-delirium-alzheimers/what-is-delirium/", "id": "dhlkyIiD_RA", "title": "What is delirium?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-delirium"}], "in_knowledge_map": false, "description": "", "node_slug": "dementia-delirium-alzheimers", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/mental-health/dementia-delirium-alzheimers", "extended_slug": "science/health-and-medicine/mental-health/dementia-delirium-alzheimers", "kind": "Topic", "slug": "dementia-delirium-alzheimers"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/", "id": "neurodevelopmental-disorders", "hide": false, "title": "Neurodevelopmental disorders", "child_data": [{"kind": "Article", "id": "x1074ddfd"}, {"kind": "Article", "id": "x5d07a036"}, {"kind": "Video", "id": "xf2a497f3"}, {"kind": "Video", "id": "x03ad1eee"}, {"kind": "Video", "id": "x13e35161"}, {"kind": "Video", "id": "x471f0674"}, {"kind": "Video", "id": "x84893776"}, {"kind": "Video", "id": "x021a2f65"}, {"kind": "Video", "id": "x9e2fafc9"}, {"kind": "Article", "id": "xfc4d9630"}, {"kind": "Video", "id": "xe69f1f1e"}, {"kind": "Video", "id": "xfa8263b2"}, {"kind": "Video", "id": "xdc0ff370"}, {"kind": "Video", "id": "xfb0f98ec"}, {"kind": "Video", "id": "x7602394c"}], "children": [{"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/intro-to-neurodevelopment-milestones/", "id": "4qbb4f1I67k", "title": "Intro to neurodevelopment milestones", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "intro-to-neurodevelopment-milestones"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/neurodevelopmental-disorders-sufficient-and-necessary-causes/", "id": "lc5XDJIgz1s", "title": "Neurodevelopmental disorders: Sufficient and necessary causes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "neurodevelopmental-disorders-sufficient-and-necessary-causes"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/what-is-cerebral-palsy-and-what-causes-it/", "id": "ii1MBfj7-Sk", "title": "What is cerebral palsy and what causes it?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-cerebral-palsy-and-what-causes-it"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/types-of-cerebral-palsy-part-1-spastic/", "id": "26Rq8an37Q8", "title": "Types of cerebral palsy part 1 - Spastic", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "types-of-cerebral-palsy-part-1-spastic"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/types-of-cerebral-palsy-part-2-dyskinetic-and-ataxic/", "id": "3s-n4eFypPc", "title": "Types of cerebral palsy part 2 - Dyskinetic and ataxic", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "types-of-cerebral-palsy-part-2-dyskinetic-and-ataxic"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/diagnosing-cerebral-palsy/", "id": "DoNiKvnYW_A", "title": "Diagnosing cerebral palsy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-cerebral-palsy"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/managing-cerebral-palsy/", "id": "uD7nKhiLB40", "title": "Managing cerebral palsy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "managing-cerebral-palsy"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/what-is-autism-spectrum-disorder/", "id": "WuSuIgiOPqM", "title": "What is autism spectrum disorder?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-autism-spectrum-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/what-is-tourettes/", "id": "cNaonU-UFcY", "title": "What is Tourette's?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-tourettes"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/diagnosing-autism-spectrum-disorder/", "id": "XmDfHU0hS18", "title": "Diagnosing autism spectrum disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-autism-spectrum-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/managing-autism-spectrum-disorder/", "id": "2oKVTTHA5u0", "title": "Managing autism spectrum disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "managing-autism-spectrum-disorder"}, {"path": "khan/science/health-and-medicine/mental-health/neurodevelopmental-disorders/what-is-asperger-syndrome/", "id": "CNSd1HufEcM", "title": "What is asperger syndrome?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-asperger-syndrome"}], "in_knowledge_map": false, "description": "", "node_slug": "neurodevelopmental-disorders", "render_type": "Tutorial", "topic_page_url": "/science/health-and-medicine/mental-health/neurodevelopmental-disorders", "extended_slug": "science/health-and-medicine/mental-health/neurodevelopmental-disorders", "kind": "Topic", "slug": "neurodevelopmental-disorders"}], "in_knowledge_map": false, "description": "", "node_slug": "mental-health", "render_type": "Topic", "topic_page_url": "/science/health-and-medicine/mental-health", "extended_slug": "science/health-and-medicine/mental-health", "kind": "Topic", "slug": "mental-health"}], "in_knowledge_map": false, "description": "The medical world can be a confusing place. Patients and their families might feel overwhelmed by the large vocabularies and complicated explanations they get from their health care providers. Students entering health care also struggle to grasp the complexity of health sciences, and are forced to memorize huge amounts of information. We hope to make understanding the medical world a bit easier. Look around!\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have\nregarding a medical condition. Never disregard professional medical advice or delay seeking it because of something you have read or seen in any Khan Academy video.", "node_slug": "health-and-medicine", "render_type": "Subject", "topic_page_url": "/science/health-and-medicine", "extended_slug": "science/health-and-medicine", "kind": "Topic", "slug": "health-and-medicine"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/discoveries-projects/", "id": "discoveries-projects", "hide": false, "title": "Discoveries and projects", "child_data": [{"kind": "Topic", "id": "x7f8a9b2b"}, {"kind": "Topic", "id": "x6714e769"}, {"kind": "Topic", "id": "xf830622e"}, {"kind": "Topic", "id": "xeb4f050d"}, {"kind": "Topic", "id": "xa34a0a49"}, {"kind": "Topic", "id": "x61d0199b"}, {"kind": "Topic", "id": "x3083cbfa"}, {"kind": "Topic", "id": "x3319f34f"}, {"kind": "Topic", "id": "x1ae73254"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/discoveries-projects/robots/", "id": "robots", "hide": false, "title": "Robots", "child_data": [{"kind": "Topic", "id": "x7f348877"}, {"kind": "Topic", "id": "xd833b494"}, {"kind": "Topic", "id": "x92a8ccbc"}, {"kind": "Topic", "id": "x989edfd5"}, {"kind": "Topic", "id": "x4767a89b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/robots/all-about-spout/", "id": "all-about-spout", "hide": false, "title": "All about Spout", "child_data": [{"kind": "Video", "id": "1390111555"}, {"kind": "Video", "id": "x4f8f0cdc"}, {"kind": "Video", "id": "xea48aeaa"}, {"kind": "Video", "id": "x625134bb"}, {"kind": "Video", "id": "xad1dfde5"}, {"kind": "Video", "id": "x6dd4615f"}, {"kind": "Video", "id": "x820027cc"}, {"kind": "Scratchpad", "id": "2380038500"}, {"kind": "Scratchpad", "id": "2396242478"}], "children": [{"path": "khan/science/discoveries-projects/robots/all-about-spout/spout-bot-at-santa-rita-elementary-school/", "id": "OlYwHNKN-qw", "title": "3rd graders build robots at Santa Rita Elementary School", "kind": "Video", "description": "Mrs. Rowhani's third graders learn about matter and energy by building a Spout bot with Khan Academy. \n\nSpecial thanks to: Santa Rita's volunteer parents, Kami Thordarson, Karen Wilson and of course Laleh Rowhani the class teacher.", "slug": "spout-bot-at-santa-rita-elementary-school"}, {"path": "khan/science/discoveries-projects/robots/all-about-spout/spdt-lever-switch/", "id": "1_OieLuWGyw", "title": "SPDT switch", "kind": "Video", "slug": "spdt-lever-switch"}, {"path": "khan/science/discoveries-projects/robots/all-about-spout/sliding-spdt-switch/", "id": "u5NCRHcel_g", "title": "Spout's sliding SPDT switch", "kind": "Video", "slug": "sliding-spdt-switch"}, {"path": "khan/science/discoveries-projects/robots/all-about-spout/spout_light_circuit/", "id": "FfN8uQqLa_c", "title": "Spout lights", "kind": "Video", "slug": "spout_light_circuit"}, {"path": "khan/science/discoveries-projects/robots/all-about-spout/spout_motor/", "id": "LXi5FUMNTjE", "title": "Spout motor", "kind": "Video", "slug": "spout_motor"}, {"path": "khan/science/discoveries-projects/robots/all-about-spout/spout_battery/", "id": "KWf5kSNPbz0", "title": "Spout battery configuration and polarization", "kind": "Video", "slug": "spout_battery"}, {"path": "khan/science/discoveries-projects/robots/all-about-spout/spout-current-reversing-switch/", "id": "5dlE_wobLoM", "title": "Spout's reversing circuit and final assembly", "kind": "Video", "slug": "spout-current-reversing-switch"}], "in_knowledge_map": false, "description": "This topic explains how Spout works! It was created by Karl R. C. Wendt.", "node_slug": "all-about-spout", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/robots/all-about-spout", "extended_slug": "science/discoveries-projects/robots/all-about-spout", "kind": "Topic", "slug": "all-about-spout"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/", "id": "Spout-Bot-with-Solder", "hide": false, "title": "Spout Bot with Solder", "child_data": [{"kind": "Video", "id": "x7a463592"}, {"kind": "Article", "id": "x8fff4cf4"}, {"kind": "Video", "id": "x722ce87b"}, {"kind": "Video", "id": "x2537b483"}, {"kind": "Video", "id": "x28303800"}, {"kind": "Video", "id": "x561e658f"}, {"kind": "Video", "id": "xec4f22cb"}, {"kind": "Video", "id": "x7b8ff83e"}, {"kind": "Video", "id": "x4a9ed442"}], "children": [{"path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/parts-for-spout/", "id": "5ZXB-gCs1oM", "title": "Parts for Spout", "kind": "Video", "slug": "parts-for-spout"}, {"path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/spout-tools/", "id": "OmVBfdmWItk", "title": "Spout tools", "kind": "Video", "slug": "spout-tools"}, {"path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/soldering-saftey/", "id": "gW-7yeUW7-k", "title": "Soldering Saftey", "kind": "Video", "slug": "soldering-saftey"}, {"path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/spout-switches/", "id": "fEkK5MbG7PU", "title": "Spout switches", "kind": "Video", "slug": "spout-switches"}, {"path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/spout-motor-mount/", "id": "W9AVRhqEkek", "title": "Spout motor mount", "kind": "Video", "slug": "spout-motor-mount"}, {"path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/spout-motor-wiring/", "id": "zsdek-uH0NU", "title": "Spout motor wiring", "kind": "Video", "slug": "spout-motor-wiring"}, {"path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/spout-led-eye-wiring/", "id": "cyCad5HaHaE", "title": "Spout wiring for LED eyes", "kind": "Video", "slug": "spout-led-eye-wiring"}, {"path": "khan/science/discoveries-projects/robots/spout-bot-with-solder/spout-tail/", "id": "6F32MMvcDNs", "title": "Spout antennae and tail", "kind": "Video", "slug": "spout-tail"}], "in_knowledge_map": false, "description": "This project is based on a MAKE Beetle bot. The tutorial was created by Karl R.C. Wendt.", "node_slug": "Spout-Bot-with-Solder", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/robots/Spout-Bot-with-Solder", "extended_slug": "science/discoveries-projects/robots/Spout-Bot-with-Solder", "kind": "Topic", "slug": "spout-bot-with-solder"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/robots/solderless-spout-bot/", "id": "Solderless-Spout-Bot", "hide": false, "title": "Spout Bot without Solder", "child_data": [{"kind": "Article", "id": "x2bc8c6cb"}, {"kind": "Article", "id": "x8a4d9686"}, {"kind": "Article", "id": "x08e5da01"}, {"kind": "Video", "id": "x7b3deff4"}, {"kind": "Video", "id": "x9ed4e36c"}, {"kind": "Video", "id": "xa2ac9619"}, {"kind": "Video", "id": "x5099d33c"}, {"kind": "Video", "id": "x17213762"}, {"kind": "Video", "id": "x67dd754d"}, {"kind": "Video", "id": "x7f36aa8f"}, {"kind": "Video", "id": "x6d4761cf"}, {"kind": "Video", "id": "x631d9462"}, {"kind": "Video", "id": "xa39f8044"}, {"kind": "Video", "id": "x0b05c85e"}, {"kind": "Scratchpad", "id": "5223613313581056"}], "children": [{"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-1/", "id": "bqcVNzObJec", "title": "Tools and parts to build a Spout", "kind": "Video", "description": "Make Spout a low cost beetle bot that can avoid obstacles. Spout is low cost and can be made without solder.", "slug": "solderless-spout-1"}, {"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-2/", "id": "xRw0CLvQkjo", "title": "Connect the SPDT switches", "kind": "Video", "slug": "solderless-spout-2"}, {"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-3/", "id": "8XKFcz7zP5E", "title": "Attach the LED eyes", "kind": "Video", "slug": "solderless-spout-3"}, {"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-4/", "id": "PI5WiM98S8U", "title": "Wire the SPDT switches", "kind": "Video", "slug": "solderless-spout-4"}, {"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-5/", "id": "Q1XPg-2KB_A", "title": "Create the motor mounts", "kind": "Video", "slug": "solderless-spout-5"}, {"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-6/", "id": "gyXzJ3as26k", "title": "Secure and wire the motors", "kind": "Video", "slug": "solderless-spout-6"}, {"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-7/", "id": "_QdS8xjYL48", "title": "Install on/off switches", "kind": "Video", "slug": "solderless-spout-7"}, {"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-8/", "id": "ZbN_ispEm3A", "title": "Connect the LEDs to an on/off switch", "kind": "Video", "slug": "solderless-spout-8"}, {"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-9/", "id": "VIdvlSFDl2c", "title": "Attach Spout's antennae", "kind": "Video", "slug": "solderless-spout-9"}, {"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-10/", "id": "mDttV5UmJ1Q", "title": "Add Spout's tail", "kind": "Video", "slug": "solderless-spout-10"}, {"path": "khan/science/discoveries-projects/robots/solderless-spout-bot/solderless-spout-11/", "id": "AwX4O87g1qk", "title": "Give Spout some grippy feet", "kind": "Video", "slug": "solderless-spout-11"}], "in_knowledge_map": false, "description": "This project is based on a MAKE Beetle bot. The tutorial was created by Karl R. C. Wendt.", "node_slug": "Solderless-Spout-Bot", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/robots/Solderless-Spout-Bot", "extended_slug": "science/discoveries-projects/robots/Solderless-Spout-Bot", "kind": "Topic", "slug": "solderless-spout-bot"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/robots/spider_bot/", "id": "Spider_bot", "hide": false, "title": "Spider Bot", "child_data": [{"kind": "Video", "id": "xaab40dee"}, {"kind": "Video", "id": "xa2217895"}, {"kind": "Article", "id": "x8e775cc5"}, {"kind": "Article", "id": "x7365be54"}, {"kind": "Video", "id": "1378551671"}, {"kind": "Video", "id": "1378412420"}, {"kind": "Video", "id": "1379095162"}, {"kind": "Video", "id": "1379116151"}, {"kind": "Video", "id": "1378993508"}, {"kind": "Video", "id": "1378992591"}, {"kind": "Video", "id": "1378994700"}, {"kind": "Video", "id": "1379093212"}, {"kind": "Video", "id": "1379138063"}, {"kind": "Video", "id": "1397303333"}, {"kind": "Video", "id": "1379081289"}, {"kind": "Video", "id": "1378982910"}, {"kind": "Video", "id": "1379797015"}, {"kind": "Article", "id": "1380614342"}, {"kind": "Video", "id": "1401998447"}], "children": [{"path": "khan/science/discoveries-projects/robots/spider_bot/santa_rita_spider_bots/", "id": "WfMfs6naKkE", "title": "6th graders learn to build a Spider robot", "kind": "Video", "description": "Vicki Lombardi's 6th grade students at Santa Rita Elementary in Los Altos School district learn how to build a Spider robot.\n\nRead more at: http://lasdilearn.blogspot.com/2013/02/third-graders-building-robots-mission.html", "slug": "santa_rita_spider_bots"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/fun-with-a-spider-bot/", "id": "6DE6PNg58tM", "title": "Fun with Spider Bot", "kind": "Video", "slug": "fun-with-a-spider-bot"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/1-spider-parts-and-tools/", "id": "Hp46Y6j_Qdc", "title": "Spider parts and tools", "kind": "Video", "description": "In this video we review some of the parts and tools you will need to build a spider bot.", "slug": "1-spider-parts-and-tools"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/2-hacking-spiders-click-n-stick/", "id": "7PgYb0c_3KE", "title": "Spider's click n' stick", "kind": "Video", "description": "In this video we show you how to hack a click n' stick tap light to make a body for Spider", "slug": "2-hacking-spiders-click-n-stick"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/3-creating-the-battery-and-motor-mounts-for-spider/", "id": "6crKuLMj_b4", "title": "Battery and motor mounts for Spider", "kind": "Video", "description": "In this video we show you how to connect Spider's motors and batteries", "slug": "3-creating-the-battery-and-motor-mounts-for-spider"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/4-attach-spider-s-click-n-stick-base-to-the-batteries/", "id": "TDpQ5xL1EEE", "title": "Click n' stick base & batteries", "kind": "Video", "description": "In this video we show you how to connect Spider's motors to his tap light base.", "slug": "4-attach-spider-s-click-n-stick-base-to-the-batteries"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/5-attach-spider-s-motor-controller-and-wire-his-motors/", "id": "gW54YZzQsHE", "title": "Spider's motor controller", "kind": "Video", "description": "In this video we show you how to connect and wire Spider's motor controller.", "slug": "5-attach-spider-s-motor-controller-and-wire-his-motors"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/6-connect-spider-s-power-switch-and-run-the-power-wires-to-the-motor-controller/", "id": "k2_PdizIgN4", "title": "Spider's power switch", "kind": "Video", "slug": "6-connect-spider-s-power-switch-and-run-the-power-wires-to-the-motor-controller"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/7-attach-and-adjust-the-spider-s-bezel/", "id": "xg2OHgS0ijk", "title": "Spider's bezel", "kind": "Video", "slug": "7-attach-and-adjust-the-spider-s-bezel"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/8-attach-spider-s-wheels/", "id": "kPrv93a5L0I", "title": "Spider's wheels", "kind": "Video", "slug": "8-attach-spider-s-wheels"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/9-make-the-connnectors-for-spider-s-arduino-nano/", "id": "FfyNtrmmGEI", "title": "Spider's Arduino Nano", "kind": "Video", "slug": "9-make-the-connnectors-for-spider-s-arduino-nano"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/10-spider-connect-the-power-and-signal-wires-from-the-motor-controller-to-the-arduino/", "id": "qGbRrM5hWq4", "title": "Motor controller connections", "kind": "Video", "slug": "10-spider-connect-the-power-and-signal-wires-from-the-motor-controller-to-the-arduino"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/10-attach-spider-s-led-eyes/", "id": "nW0CVmMHovM", "title": "Spider's LED eyes", "kind": "Video", "slug": "10-attach-spider-s-led-eyes"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/11-connect-spider-s-stablizer-bar/", "id": "l3BoIj9_oRs", "title": "Spider's stablizer bar", "kind": "Video", "slug": "11-connect-spider-s-stablizer-bar"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/12-spiders-romance/", "id": "ubXjr_dQ-y0", "title": "Spider's romance", "kind": "Video", "description": "Happy Valentines Day from Khan Academy Projects", "slug": "12-spiders-romance"}, {"path": "khan/science/discoveries-projects/robots/spider_bot/15-ben-eater-s-spider-bot/", "id": "yBCB9CvVdpg", "title": "Ben Eater's Spider", "kind": "Video", "description": "In this video Karl talks to Ben Eater about his improvements to the Spider bot platform.", "slug": "15-ben-eater-s-spider-bot"}], "in_knowledge_map": false, "description": "Spider Bot is a low cost robot made of recycled components and designed by Karl R. C. Wendt", "node_slug": "Spider_bot", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/robots/Spider_bot", "extended_slug": "science/discoveries-projects/robots/Spider_bot", "kind": "Topic", "slug": "spider_bot"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/robots/bit-zee/", "id": "Bit-zee", "hide": false, "title": "Bit-zee Bot", "child_data": [{"kind": "Video", "id": "1077533640"}, {"kind": "Video", "id": "1084192062"}, {"kind": "Article", "id": "x2191f4d6"}, {"kind": "Article", "id": "xa9d930f8"}, {"kind": "Video", "id": "1079212624"}, {"kind": "Video", "id": "1118389351"}, {"kind": "Video", "id": "1118650171"}, {"kind": "Video", "id": "1124617722"}, {"kind": "Video", "id": "1125966706"}, {"kind": "Video", "id": "1126273384"}, {"kind": "Video", "id": "1126680590"}, {"kind": "Video", "id": "1131963985"}, {"kind": "Video", "id": "1132083657"}, {"kind": "Video", "id": "1126997117"}, {"kind": "Video", "id": "1115746507"}, {"kind": "Video", "id": "1115230216"}, {"kind": "Video", "id": "1132107561"}, {"kind": "Video", "id": "1128334291"}, {"kind": "Video", "id": "1128609901"}, {"kind": "Video", "id": "1131599025"}, {"kind": "Video", "id": "1132629473"}, {"kind": "Video", "id": "1134600769"}, {"kind": "Video", "id": "1135006386"}, {"kind": "Video", "id": "1220108304"}, {"kind": "Video", "id": "1178339328"}, {"kind": "Video", "id": "1220162268"}, {"kind": "Video", "id": "1220192283"}, {"kind": "Video", "id": "1220997323"}, {"kind": "Video", "id": "1220977278"}, {"kind": "Video", "id": "1220940750"}, {"kind": "Video", "id": "1220722985"}, {"kind": "Article", "id": "1396323351"}], "children": [{"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-classroom/", "id": "CcziDRr5Myc", "title": "Bit-zeeeeeeeeeee", "kind": "Video", "description": "Bit-zee is a project designed to inspire students to explore math and science. It was created from everyday items (a hair dryer, tap light, alarm clock, digital camera, and a universal remote). See the following link for help with the code https://sites.google.com/site/khanacademyprojects/home", "slug": "bit-zee-classroom"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-long-version/", "id": "KmmFBC0gNSg", "title": "Bit-zeeeeeeeeeee (long version)", "kind": "Video", "description": "Bit-zee goes to school", "slug": "bit-zee-long-version"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-intro/", "id": "mwP5OHJe1ak", "title": "Introduction", "kind": "Video", "description": "In this video we discuss some of the key parts of Bit-zee", "slug": "bit-zee-intro"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-planning-and-propulsion/", "id": "Kq0Er6JBMmc", "title": "Planning and propulsion", "kind": "Video", "description": "The video covers the first stages of idea generation for Bit-zee and how to make Bit-zee move.", "slug": "bit-zee-planning-and-propulsion"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-bits/", "id": "VnfpSf6YxuU", "title": "Parts", "kind": "Video", "description": "In this video we take a quick a look at some of the parts we used to make Bit-zee. Although we highly recommend you create your own Bit-zee using parts from products that people would otherwise throw away.", "slug": "bit-zee-s-bits"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-chassis-timelapse-mov/", "id": "jo1bjsBbcc8", "title": "Chassis/frame", "kind": "Video", "description": "In this video we show you how to craft the chassis for the Bit-zee using a $3 piece of Lexan and tap light housing", "slug": "bit-zee-s-chassis-timelapse-mov"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-wheel-mounts-and-fenders/", "id": "bP__iEY9yTs", "title": "Wheel mounts and fenders", "kind": "Video", "description": "In this video we show you how to create Bit-zee's fenders out of hair dryer motor mounts and we also take you through how to mount the hair dryer motors in Bit-zee's frame.", "slug": "bit-zee-s-wheel-mounts-and-fenders"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-component-mounting-holes/", "id": "YvUWkJcfp1w", "title": "Component mounting holes", "kind": "Video", "description": "In this video we show you how and where to create the mounting holes in BIt-zee's Lexan base for the arduino, batteries, camera, on/off switch and wire routing.", "slug": "bit-zee-s-component-mounting-holes"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-batteries/", "id": "L8NrBjd1aNo", "title": "Batteries/power", "kind": "Video", "description": "In this video we install 8 AA batteries in Bit-zee's frame using zip ties.", "slug": "bit-zee-s-batteries"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/improving-the-battery-wires/", "id": "h8S-dOQe1-0", "title": "Battery wires", "kind": "Video", "description": "In this video we upgrade Bit-zee' battery wires from 32 gage to 18 gauge.", "slug": "improving-the-battery-wires"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/connecting-bit-zee-s-power-wires-and-on-off-switch/", "id": "ebGzJabI3mw", "title": "Power wires and on/off switch", "kind": "Video", "description": "In this video we show you how to switch on and off Bit-zee's electrical power.", "slug": "connecting-bit-zee-s-power-wires-and-on-off-switch"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/wiring-installing-bit-zee-s-motors/", "id": "iU1oIFPM1-I", "title": "Motors/propulsion", "kind": "Video", "description": "In this video we re-wire Bit-zee's motors to include longer wires and then we re-attach them to his frame. This video shows more detail than the previous motor video and it is shot in real time. This video also shows how to route the wires.", "slug": "wiring-installing-bit-zee-s-motors"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/why-does-bit-zee-need-a-motor-controller/", "id": "7CqigPmXyv8", "title": "Motor controller functions", "kind": "Video", "description": "This video outlines in simple terms why a motor controller is needed and what it does", "slug": "why-does-bit-zee-need-a-motor-controller"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zees-motor-controller/", "id": "T4iRq8_ZmAA", "title": "Motor controller", "kind": "Video", "description": "In this video we take you step by step through building the L298 Motor driver. This controller allows you to use your Arduino to control the hair dryer motors used to move the Bit-zee bot.", "slug": "bit-zees-motor-controller"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/attach-and-wire-bit-zee-s-motor-controller/", "id": "CSXP02Cl3zM", "title": "Motor controller connections", "kind": "Video", "description": "In this video we show you how to attach and wire the L-298 motor controller board to Bit-zee's frame.", "slug": "attach-and-wire-bit-zee-s-motor-controller"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/attaching-bit-zee-s-arduino/", "id": "o0XKRK3a3cs", "title": "Arduino connections", "kind": "Video", "description": "In this video we show you how to connect Bit-zee's Arduino micro-controller to his frame.", "slug": "attaching-bit-zee-s-arduino"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/how-to-hotwire-a-digital-camera/", "id": "bhMQYdoh8EQ", "title": "Digital camera connections", "kind": "Video", "description": "This video shows you how to \"hotwire\" a digital camera. This video outlines the first step in making our digital camera work in the Bit-zee robot. The required voltage for the camera was determined by adding the1.5 volt AAA batteries (there are three of them) together to get 4.5 volts (because the batteries are wired in series). Since new batteries usually have a voltage that exceeds their marked rating the camera can easily run on the 5 volts that the center terminal of our L298 motor controller provides.", "slug": "how-to-hotwire-a-digital-camera"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/attach-bit-zee-s-digital-camera/", "id": "8GhjZn2W8ns", "title": "Digital camera connections II", "kind": "Video", "description": "In this video we show you how to attach Bit-zee's camera and route the wires", "slug": "attach-bit-zee-s-digital-camera"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-5-volt-power-distribution-board/", "id": "iqHZp79FhO8", "title": "5 volt power distribution board", "kind": "Video", "description": "In this video we hack apart a bread board to create a 5 volt power distribution strip. The 5 volts comes from the center pin in the motor controller and the negative or ground comes from the ground pin on the motor controller.", "slug": "bit-zee-s-5-volt-power-distribution-board"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/hacking-and-attaching-a-digital-recorder-player/", "id": "efQjBTPhS_0", "title": "Digital recorder/player connections", "kind": "Video", "description": "In this video we attach and wire a digital voice recorder to Bit-zee.", "slug": "hacking-and-attaching-a-digital-recorder-player"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/making-a-power-connector-for-the-arduino/", "id": "4HkbFUoX0iI", "title": "Power connector for the Arduino", "kind": "Video", "description": "In this video we show you how to create a power connector for your arduino.", "slug": "making-a-power-connector-for-the-arduino"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/attaching-bit-zee-s-prototype-board/", "id": "DRz9B6SHWQ4", "title": "Prototype board", "kind": "Video", "description": "In this video we attach Bit-zee's bread board", "slug": "attaching-bit-zee-s-prototype-board"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/connecting-the-motor-controller-to-the-arduino/", "id": "C9ITaG1_XoA", "title": "Motor controller connection to Arduino", "kind": "Video", "description": "In this video we show you how to determine which wire is which and how to connect them to your Arduino.", "slug": "connecting-the-motor-controller-to-the-arduino"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/connecting-bit-zee-s-camera-to-the-arduino/", "id": "T2ZnxsBWU3E", "title": "Camera connection to the Arduino", "kind": "Video", "description": "In this video we wire Bit-zee's camera's shutter and power functions to some transistors on the bread board and then we connect the transistors to the Arduino.", "slug": "connecting-bit-zee-s-camera-to-the-arduino"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-bumper-switches/", "id": "JEXhbd0JOWk", "title": "Bumper switches", "kind": "Video", "description": "In this video we create and wire Bit-zee's bumper switches", "slug": "bit-zee-s-bumper-switches"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-eyes/", "id": "lrIUaN_UKYs", "title": "LED eyes", "kind": "Video", "description": "In this video we create and wire Bit-zee's tri-color LED eyes", "slug": "bit-zee-s-eyes"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-ir-sensor/", "id": "KNtVlP9Htnk", "title": "IR sensor", "kind": "Video", "description": "In this video we connect, bend and wire Bit-zee's IR sensor. This sensor will allow Bit-zee to receive commands from a universal remote control.", "slug": "bit-zee-s-ir-sensor"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/bit-zee-s-shell/", "id": "87-DnbQatO8", "title": "Chassis modifications", "kind": "Video", "description": "This video shows how Bit-zee's shell was modified to allow space for the bumper switches.", "slug": "bit-zee-s-shell"}, {"path": "khan/science/discoveries-projects/robots/bit-zee/camera-wiring-update/", "id": "KhyDlw99aSY", "title": "Camera wiring update", "kind": "Video", "description": "This video shows you how to reduce the complexity of your Bit-zee while improving the speed of your Bit-zee digital camera.", "slug": "camera-wiring-update"}], "in_knowledge_map": false, "description": "This project is a low cost robot made from every day items that are taken apart and described in the reverse engineering section. This project was created by Karl R. C. Wendt.", "node_slug": "Bit-zee", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/robots/Bit-zee", "extended_slug": "science/discoveries-projects/robots/Bit-zee", "kind": "Topic", "slug": "bit-zee"}], "in_knowledge_map": false, "description": "Start your own robotics project with Spout, Spider, and Bit-zee!", "node_slug": "robots", "render_type": "Topic", "topic_page_url": "/science/discoveries-projects/robots", "extended_slug": "science/discoveries-projects/robots", "kind": "Topic", "slug": "robots"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/discoveries-projects/lego-robotics/", "id": "lego robotics", "hide": false, "title": "Lego robotics", "child_data": [{"kind": "Topic", "id": "xedba4611"}, {"kind": "Topic", "id": "xd1baa994"}, {"kind": "Topic", "id": "x613aad30"}, {"kind": "Topic", "id": "xf80b2eaa"}, {"kind": "Topic", "id": "xd3d5b959"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/lego-robotics/lego-intro/", "id": "lego-intro", "hide": false, "title": "Introduction", "child_data": [{"kind": "Video", "id": "x9a7c4bb6"}, {"kind": "Video", "id": "x2a5f0982"}, {"kind": "Video", "id": "x1a9de490"}, {"kind": "Article", "id": "x6df16bab"}, {"kind": "Article", "id": "xf22b6d9e"}, {"kind": "Article", "id": "xe0eca833"}], "children": [{"path": "khan/science/discoveries-projects/lego-robotics/lego-intro/lego-robots-anything-is-possible/", "id": "McH0dsTOg2E", "title": "Anything is possible!", "kind": "Video", "description": "Anything robots can do, lego robots can do!", "slug": "lego-robots-anything-is-possible"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-intro/discovery-lab-design-building-lego-robots/", "id": "odpzXKZDTt0", "title": "DLab: Inspired by sumo robots", "kind": "Video", "description": "Inspiration from Khan Academy's Discovery Lab", "slug": "discovery-lab-design-building-lego-robots"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-intro/introduction-to-environment/", "id": "3quWEMobksw", "title": "Introduction to programming", "kind": "Video", "description": "Get to know the NXT-G environment", "slug": "introduction-to-environment"}], "in_knowledge_map": false, "description": "Introduction to the Lego NXT environment and what it is capable of. We begin with a few mini projects.", "node_slug": "lego-intro", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/lego robotics/lego-intro", "extended_slug": "science/discoveries-projects/lego robotics/lego-intro", "kind": "Topic", "slug": "lego-intro"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/lego-robotics/lego-sensors/", "id": "lego-sensors", "hide": false, "title": "Light guitar", "child_data": [{"kind": "Video", "id": "x8cfdcf83"}, {"kind": "Video", "id": "x91ac81ad"}, {"kind": "Video", "id": "xcc38753d"}, {"kind": "Article", "id": "x995c7987"}], "children": [{"path": "khan/science/discoveries-projects/lego-robotics/lego-sensors/lego-nxt-light-guitar/", "id": "43j2gGEP4JI", "title": "Demo: light guitar", "kind": "Video", "description": "Light guitar in action!", "slug": "lego-nxt-light-guitar"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-sensors/lego-datawires/", "id": "-1w9RXhCmsE", "title": "Data wires", "kind": "Video", "description": "data wires allow you to send values directly from input sensors to output devices", "slug": "lego-datawires"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-sensors/lego-mathblock/", "id": "fJHFM2dOmiY", "title": "Math block", "kind": "Video", "description": "Math blocks allow you to scale values (and much more!)", "slug": "lego-mathblock"}], "in_knowledge_map": false, "description": "Get to know your light sensor while building musical instruments", "node_slug": "lego-sensors", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/lego robotics/lego-sensors", "extended_slug": "science/discoveries-projects/lego robotics/lego-sensors", "kind": "Topic", "slug": "lego-sensors"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/lego-robotics/lego-coin-detector/", "id": "lego-coin-detector", "hide": false, "title": "Coin detector", "child_data": [{"kind": "Video", "id": "x6c336042"}, {"kind": "Video", "id": "x504fba13"}, {"kind": "Video", "id": "xf198b676"}, {"kind": "Video", "id": "x8e4bf02c"}, {"kind": "Video", "id": "xc16acf70"}, {"kind": "Video", "id": "x8ac891f1"}, {"kind": "Article", "id": "xc8933a13"}], "children": [{"path": "khan/science/discoveries-projects/lego-robotics/lego-coin-detector/lego-nxt-coin-detector/", "id": "OxaG0VxaVXw", "title": "Demo: coin detector", "kind": "Video", "description": "demonstration of a simple coin detector", "slug": "lego-nxt-coin-detector"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-coin-detector/lego-coin-detector/", "id": "uR5ZWegnTvA", "title": "Construction", "kind": "Video", "description": "You can get started with this simple design, then add your own complexity after!", "slug": "lego-coin-detector"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-coin-detector/lego-rotationsensor/", "id": "GcLSWBjp6UM", "title": "Rotation sensor", "kind": "Video", "description": "Familiarize yourself with rotation sensor. Build a volume knob", "slug": "lego-rotationsensor"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-coin-detector/lego-switchlogic/", "id": "ixKzDofqMrU", "title": "Switch statements & logic", "kind": "Video", "description": "Control switch statments using logic", "slug": "lego-switchlogic"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-coin-detector/lego-coinchallenge/", "id": "Qz0n0ZwdCpQ", "title": "Design review (calibration)", "kind": "Video", "description": "Final step in the coin detector challenge", "slug": "lego-coinchallenge"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-coin-detector/lego-sensorpolling/", "id": "jSWLolne0Oc", "title": "Polling sensors", "kind": "Video", "description": "Check the real-time values of your\u00a0sensors", "slug": "lego-sensorpolling"}], "in_knowledge_map": false, "description": "Get to know your rotation sensor while building a 5 cent machine", "node_slug": "lego-coin-detector", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/lego robotics/lego-coin-detector", "extended_slug": "science/discoveries-projects/lego robotics/lego-coin-detector", "kind": "Topic", "slug": "lego-coin-detector"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/lego-robotics/lego-antbot/", "id": "lego-antbot", "hide": false, "title": "Ant bot", "child_data": [{"kind": "Video", "id": "xfd58fb0a"}, {"kind": "Article", "id": "x5b354d9a"}, {"kind": "Video", "id": "xd839a468"}, {"kind": "Video", "id": "x86fbb9d4"}, {"kind": "Video", "id": "x414f8ca0"}, {"kind": "Article", "id": "x7a554499"}], "children": [{"path": "khan/science/discoveries-projects/lego-robotics/lego-antbot/lego-ant-bot/", "id": "ksMisCPSs5g", "title": "Demo: ant bot", "kind": "Video", "description": "demonstration of a basic ant bot", "slug": "lego-ant-bot"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-antbot/lego-antbot-build/", "id": "EOiCa4i3oKo", "title": "Robot construction", "kind": "Video", "description": "Basic construction to get started", "slug": "lego-antbot-build"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-antbot/lego-moveblock/", "id": "_2pGxgq2D3s", "title": "Move block", "kind": "Video", "description": "Ready, set... start your engines!", "slug": "lego-moveblock"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-antbot/lego-switchstatements/", "id": "MALIJQ3Q_zs", "title": "Switch block (nested)", "kind": "Video", "description": "We can combine switch blocks for more advanced behavior", "slug": "lego-switchstatements"}], "in_knowledge_map": false, "description": "Build an ant colony with simple behaviours", "node_slug": "lego-antbot", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/lego robotics/lego-antbot", "extended_slug": "science/discoveries-projects/lego robotics/lego-antbot", "kind": "Topic", "slug": "lego-antbot"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/", "id": "lego-programming-basics", "hide": false, "title": "Programming basics", "child_data": [{"kind": "Video", "id": "x86fbb9d4"}, {"kind": "Video", "id": "x0d4560e8"}, {"kind": "Video", "id": "xf87cacc9"}, {"kind": "Video", "id": "x414f8ca0"}, {"kind": "Video", "id": "x8e4bf02c"}, {"kind": "Video", "id": "xcc38753d"}, {"kind": "Video", "id": "x0685d40a"}, {"kind": "Video", "id": "x91ac81ad"}, {"kind": "Video", "id": "x8ac891f1"}], "children": [{"path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-moveblock/", "id": "_2pGxgq2D3s", "title": "Move block", "kind": "Video", "description": "Ready, set... start your engines!", "slug": "lego-moveblock"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-loopblock/", "id": "Gwjlw3K2OrQ", "title": "Loop block", "kind": "Video", "description": "Loop block allows us to repeat\u00a0behaviours", "slug": "lego-loopblock"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-switchblock/", "id": "8uLzMKrO1FU", "title": "Switch block", "kind": "Video", "description": "Control robot behavior based on some condition", "slug": "lego-switchblock"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-switchstatements/", "id": "MALIJQ3Q_zs", "title": "Switch block (nested)", "kind": "Video", "description": "We can combine switch blocks for more advanced behavior", "slug": "lego-switchstatements"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-switchlogic/", "id": "ixKzDofqMrU", "title": "Switch statements & logic", "kind": "Video", "description": "Control switch statments using logic", "slug": "lego-switchlogic"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-mathblock/", "id": "fJHFM2dOmiY", "title": "Math block", "kind": "Video", "description": "Math blocks allow you to scale values (and much more!)", "slug": "lego-mathblock"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-variable-block/", "id": "YUQXdnZPdxE", "title": "Variable block (counter)", "kind": "Video", "description": "Store values using the variable block (build a counter)", "slug": "lego-variable-block"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-datawires/", "id": "-1w9RXhCmsE", "title": "Data wires", "kind": "Video", "description": "data wires allow you to send values directly from input sensors to output devices", "slug": "lego-datawires"}, {"path": "khan/science/discoveries-projects/lego-robotics/lego-programming-basics/lego-sensorpolling/", "id": "jSWLolne0Oc", "title": "Polling sensors", "kind": "Video", "description": "Check the real-time values of your\u00a0sensors", "slug": "lego-sensorpolling"}], "in_knowledge_map": false, "description": "Collection of programming basics using NXT-G", "node_slug": "lego-programming-basics", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/lego robotics/lego-programming-basics", "extended_slug": "science/discoveries-projects/lego robotics/lego-programming-basics", "kind": "Topic", "slug": "lego-programming-basics"}], "in_knowledge_map": false, "description": "Introduction to the Lego NXT robotics platform", "node_slug": "lego robotics", "render_type": "Topic", "topic_page_url": "/science/discoveries-projects/lego robotics", "extended_slug": "science/discoveries-projects/lego robotics", "kind": "Topic", "slug": "lego-robotics"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/science/discoveries-projects/discoveries/", "id": "discoveries", "hide": false, "title": "Discoveries", "child_data": [{"kind": "Topic", "id": "xcf68efd5"}, {"kind": "Topic", "id": "xb185bc17"}, {"kind": "Topic", "id": "x4742f4bf"}, {"kind": "Topic", "id": "x0e9c6822"}, {"kind": "Topic", "id": "xef5bd47f"}, {"kind": "Topic", "id": "x181efea9"}, {"kind": "Topic", "id": "xb001207f"}, {"kind": "Topic", "id": "x3d4fdccc"}, {"kind": "Topic", "id": "x1065b901"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/science/discoveries-projects/discoveries/magnetism/", "id": "magnetism", "hide": false, "title": "Discovery of magnetism", "child_data": [{"kind": "Video", "id": "1358451554"}, {"kind": "Video", "id": "x0c01a357"}, {"kind": "Video", "id": "x4af1a708"}, {"kind": "Exercise", "id": "xc55c5fc2"}, {"kind": "Video", "id": "x10a9773b"}, {"kind": "Video", "id": "x298aa554"}, {"kind": "Video", "id": "x11ec76fc"}, {"kind": "Video", "id": "x6398a10b"}, {"kind": "Scratchpad", "id": "1549121998"}], "children": [{"path": "khan/science/discoveries-projects/discoveries/magnetism/discovery-of-magnetism/", "id": "IzyheHIPBXU", "title": "Discovery of magnetism", "kind": "Video", "description": "Our ancestors noticed that certain rocks were attracted to each other. They also noticed that this force could be transferred onto certain metallic objects!", "slug": "discovery-of-magnetism"}, {"path": "khan/science/discoveries-projects/discoveries/magnetism/which-way-is-north/", "id": "vzCVnLwaRKc", "title": "Compass: Which way is north?", "kind": "Video", "description": "how would you know which way is north if you had no reference? Can the direction of stroke alone tell you this? Are you sure?", "slug": "which-way-is-north"}, {"path": "khan/science/discoveries-projects/discoveries/magnetism/making-a-compass-stroke/", "id": "2hRIKH-Dca0", "title": "Compass build (stroke direction)", "kind": "Video", "description": "Does the direction which we stroke the needle determine the final orientation?", "slug": "making-a-compass-stroke"}, {"path": "khan/science/discoveries-projects/discoveries/magnetism/compass-challenge/", "id": "compass-challenge", "title": "Compass challenge", "slug": "compass-challenge", "kind": "Exercise"}, {"path": "khan/science/discoveries-projects/discoveries/magnetism/floating-magnet-poles/", "id": "JQ_Wojqtn7c", "title": "Floating magnet", "kind": "Video", "description": "Can you use a magnet as a compass? How can you find North vs. South pole?", "slug": "floating-magnet-poles"}, {"path": "khan/science/discoveries-projects/discoveries/magnetism/making-a-compass-orientation/", "id": "WII2kc2QYdU", "title": "Compass build (magnet orientation)", "kind": "Video", "description": "Making a Compass: does it matter if we stroke the needle with the North vs. South pole of the magnet? Why?", "slug": "making-a-compass-orientation"}, {"path": "khan/science/discoveries-projects/discoveries/magnetism/how-to-neutralize-compass/", "id": "D8NVS7itIOo", "title": "Neutralize a compass", "kind": "Video", "description": "How to neutralize a compass using two needles. How could this help us later? Why does this work?", "slug": "how-to-neutralize-compass"}, {"path": "khan/science/discoveries-projects/discoveries/magnetism/discovery-of-magnetic-poles-two-compass-needles/", "id": "LjC-H-RAclc", "title": "Compass interactions", "kind": "Video", "description": "If we float two identically magnetized needles they will always orient themselves in the same way. Why?", "slug": "discovery-of-magnetic-poles-two-compass-needles"}], "in_knowledge_map": false, "description": "The discovery of magnetism. What can we do with this invisible force?", "node_slug": "magnetism", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/discoveries/magnetism", "extended_slug": "science/discoveries-projects/discoveries/magnetism", "kind": "Topic", "slug": "magnetism"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/discoveries/magnetic-fields/", "id": "magnetic-fields", "hide": false, "title": "Discovery of magnetic fields", "child_data": [{"kind": "Video", "id": "xff3c4c1d"}, {"kind": "Video", "id": "x9e70b5b4"}, {"kind": "Scratchpad", "id": "1587803214"}, {"kind": "Video", "id": "1358966554"}, {"kind": "Scratchpad", "id": "1523498705"}, {"kind": "Scratchpad", "id": "1518316573"}, {"kind": "Scratchpad", "id": "1595281509"}, {"kind": "Video", "id": "x11cae0c8"}, {"kind": "Video", "id": "xab2c2419"}], "children": [{"path": "khan/science/discoveries-projects/discoveries/magnetic-fields/magnet-near-compass/", "id": "SysHZ6-yai0", "title": "Magnet near compass", "kind": "Video", "description": "Exploring the effect of a permanent magnet on compass. What is going on?", "slug": "magnet-near-compass"}, {"path": "khan/science/discoveries-projects/discoveries/magnetic-fields/tracing-magnetic-field/", "id": "x2V_Lz6AWEk", "title": "Tracing a magnetic field", "kind": "Video", "description": "A compass will align with the lines of force around a magnet. How could you do this in 3 dimensions?", "slug": "tracing-magnetic-field"}, {"path": "khan/science/discoveries-projects/discoveries/magnetic-fields/discovery-of-magnetic-fields/", "id": "EHLRl2D6zyE", "title": "Discovery of magnetic fields", "kind": "Video", "description": "magnetic materials seem to have two sides (we could call them poles). Depending on orientation they can be attractive or repulsive. What is the shape of the force between fields?", "slug": "discovery-of-magnetic-fields"}, {"path": "khan/science/discoveries-projects/discoveries/magnetic-fields/magnetic-permeability/", "id": "WxgNAsiOXY4", "title": "Magnetic permeability", "kind": "Video", "description": "What happens to the magnetic field of a magnet in the presence of a another material which is attracted to it. Why does this happen?", "slug": "magnetic-permeability"}, {"path": "khan/science/discoveries-projects/discoveries/magnetic-fields/increase-strength-of-magnet/", "id": "mi5cWPjhJ2c", "title": "Increase strength of magnet", "kind": "Video", "description": "How can we increase the strength of a bar magnet using a piece of steel? Why is it stronger?", "slug": "increase-strength-of-magnet"}], "in_knowledge_map": false, "description": "Let's find out more about this invisible force which guides the compass. How strong is it? What shape is it?", "node_slug": "magnetic-fields", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/discoveries/magnetic-fields", "extended_slug": "science/discoveries-projects/discoveries/magnetic-fields", "kind": "Topic", "slug": "magnetic-fields"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/discoveries/measure-magnets/", "id": "measure-magnets", "hide": false, "title": "Measuring magnetic fields", "child_data": [{"kind": "Video", "id": "x9714c12d"}, {"kind": "Article", "id": "x1d905590"}, {"kind": "Video", "id": "x30ddcb03"}, {"kind": "Article", "id": "xb7bc606f"}, {"kind": "Video", "id": "x745d92d5"}, {"kind": "Scratchpad", "id": "1602393745"}, {"kind": "Video", "id": "x71cf0746"}], "children": [{"path": "khan/science/discoveries-projects/discoveries/measure-magnets/are-two-magnets-stronger-than-one/", "id": "A_ToB9T-de8", "title": "Are 2 magnets stronger than 1?", "kind": "Video", "description": "Will the power of two magnets stuck together increase the overall force? Why?", "slug": "are-two-magnets-stronger-than-one"}, {"path": "khan/science/discoveries-projects/discoveries/measure-magnets/earth-s-magnetic-field-/", "id": "5K8U9QOj_TE", "title": "Earth's magnetic field (how to measure)", "kind": "Video", "description": "How can we describe the strength of the Earth's magnetic field using a magnet and a compass? What does this tell us?", "slug": "earth-s-magnetic-field-"}, {"path": "khan/science/discoveries-projects/discoveries/measure-magnets/inverse-square-law-deflection-method/", "id": "1NjuXzHByN8", "title": "Inverse cube law (deflection method)", "kind": "Video", "description": "Attempt to measure the change in force of a magnet over a distance using the deflection of a compass. What is wrong with this approach?", "slug": "inverse-square-law-deflection-method"}, {"path": "khan/science/discoveries-projects/discoveries/measure-magnets/inverse-square-law-method-of-oscillation/", "id": "2uzDuGp0HQ0", "title": "Inverse cube law (method of oscillation)", "kind": "Video", "description": "Here we compare the speed of compass oscillation vs. distance from a magnet. What kind of relationship do we observe. Is it linear?", "slug": "inverse-square-law-method-of-oscillation"}], "in_knowledge_map": false, "description": "How can we quantify the strength of magnetic fields? How strong is the Earth's field?", "node_slug": "measure-magnets", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/discoveries/measure-magnets", "extended_slug": "science/discoveries-projects/discoveries/measure-magnets", "kind": "Topic", "slug": "measure-magnets"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/discoveries/batteries/", "id": "batteries", "hide": false, "title": "Discovery of batteries", "child_data": [{"kind": "Video", "id": "1391800125"}, {"kind": "Article", "id": "x68e2e317"}, {"kind": "Video", "id": "xe4893edf"}, {"kind": "Scratchpad", "id": "1615491611"}, {"kind": "Video", "id": "x27a6f4f3"}, {"kind": "Video", "id": "xa8e7dc8b"}, {"kind": "Video", "id": "xf8b42f93"}, {"kind": "Video", "id": "xe57d9753"}, {"kind": "Video", "id": "x84c1fb3d"}, {"kind": "Video", "id": "xca214ba1"}, {"kind": "Video", "id": "xdc76588c"}, {"kind": "Video", "id": "x6189e926"}, {"kind": "Video", "id": "xb94b6e87"}, {"kind": "Video", "id": "1395994610"}], "children": [{"path": "khan/science/discoveries-projects/discoveries/batteries/zinc-copper-cell-reduction-oxidation/", "id": "7rkx7B990HI", "title": "Zinc copper cell (reduction-oxidation)", "kind": "Video", "description": "Zinc Copper cell - example of reduction-oxidation reaction", "slug": "zinc-copper-cell-reduction-oxidation"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/battery-meter-galvanometer/", "id": "S6_7zk_Ht_g", "title": "Battery meter (galvanometer)", "kind": "Video", "description": "Simple device which we can use to measure our homemade batteries. You can test it with any household battery first. What does this deflection represent? What forces are involved?", "slug": "battery-meter-galvanometer"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/electrolyte-test-pure-water-vs-vinegr/", "id": "E4WYJC85UQk", "title": "Electrolyte test (pure water vs. vinegar)", "kind": "Video", "description": "First we attach our galvanometer to a piece of copper and zinc. Then we submerge the metals in pure water and vinegar. What is the difference? Why?", "slug": "electrolyte-test-pure-water-vs-vinegr"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/reverse-polarity/", "id": "3iNCb7P_bdY", "title": "Reverse electrodes (polarity)", "kind": "Video", "description": "What happens to the deflection when we attach the penny and zinc in the opposite direction?", "slug": "reverse-polarity"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/electrolyte-strong-acid-test/", "id": "GKohvH75Mqg", "title": "Electrolyte (strong acid test)", "kind": "Video", "description": "Experimenting with a strong acid as electrolyte and observing the change in deflection compared to weak acid (vinegar)", "slug": "electrolyte-strong-acid-test"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/electrolyte-salt-test/", "id": "6U9f8Q3Y_SY", "title": "Electrolyte (salt test)", "kind": "Video", "description": "What happens to the deflection when we add salt to an electrolyte? Why?", "slug": "electrolyte-salt-test"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/electrode-distance-test/", "id": "e3XNXl_6NSg", "title": "Electrode (distance test)", "kind": "Video", "description": "Does the distance between the copper and zinc electrodes matter? What happens to the deflection when we hold them close vs. far apart? Why is there a difference?", "slug": "electrode-distance-test"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/electrolye-temperature-test/", "id": "6bsu9w9iIQY", "title": "Electrolyte (temperature test)", "kind": "Video", "description": "Here we experiment with hot vs. cold vinegar as our electrolyte. Does the deflection in our galvanometer depend on temperature? Why?", "slug": "electrolye-temperature-test"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/electrode-surface-area/", "id": "w6AWQb3r9o8", "title": "Electrode (surface area test)", "kind": "Video", "description": "What's the difference between one piece of metal and three pieces of metal in our cell. Does deflection change? Why?", "slug": "electrode-surface-area"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/standard-cell/", "id": "Nue0DINMRPM", "title": "Standard cell", "kind": "Video", "description": "Testing out a cell which holds the metals at a constant distance. We add it to salt water and then check the deflection. Can this be used as a standard unit?", "slug": "standard-cell"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/how-much-electrolyte-does-a-single-cell-need/", "id": "PI01CwKmiZE", "title": "How much electrolyte does a single cell need?", "kind": "Video", "description": "Observation: when we pull our cell out of the electrolyte it still causes a deflection, which increases when pressure is applied. How could this lead to more efficient batteries?", "slug": "how-much-electrolyte-does-a-single-cell-need"}, {"path": "khan/science/discoveries-projects/discoveries/batteries/the-battery-electromagnetism/", "id": "oxpr5dhqqyw", "title": "The battery and electromagnetism", "kind": "Video", "description": "The key technologies in our story.", "slug": "the-battery-electromagnetism"}], "in_knowledge_map": false, "description": "Basic observations leading to homemade batteries", "node_slug": "batteries", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/discoveries/batteries", "extended_slug": "science/discoveries-projects/discoveries/batteries", "kind": "Topic", "slug": "batteries"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/discoveries/electromagnet/", "id": "electromagnet", "hide": false, "title": "Discovery of electromagnetism", "child_data": [{"kind": "Video", "id": "1360256658"}, {"kind": "Article", "id": "1397130943"}, {"kind": "Video", "id": "x03a17a1c"}, {"kind": "Video", "id": "x8a55734d"}, {"kind": "Video", "id": "1360457116"}, {"kind": "Article", "id": "1397331287"}, {"kind": "Video", "id": "xe4893edf"}], "children": [{"path": "khan/science/discoveries-projects/discoveries/electromagnet/discovery-of-electromagnetism/", "id": "Cz7V7QoD1LA", "title": "Discovery of electromagnetism", "kind": "Video", "description": "Hans Christian \u00d8rsted made this famous observation in 1819.", "slug": "discovery-of-electromagnetism"}, {"path": "khan/science/discoveries-projects/discoveries/electromagnet/electromagnetic-field-above-vs-below/", "id": "POrFhETplGs", "title": "Electromagnetic field (above vs. below)", "kind": "Video", "description": "Testing the direction of force when the current carrying wire is above vs. below a compass. What does this tell us?", "slug": "electromagnetic-field-above-vs-below"}, {"path": "khan/science/discoveries-projects/discoveries/electromagnet/electromagnetic-field-forward-vs-reverse/", "id": "x-6yMjpsqJU", "title": "Electromagnetic field (forward vs. reverse)", "kind": "Video", "description": "Apply current in both directions and notice the response is different.", "slug": "electromagnetic-field-forward-vs-reverse"}, {"path": "khan/science/discoveries-projects/discoveries/electromagnet/primitive-electric-motor/", "id": "d22BeBhk1nY", "title": "Electromagnetic field (loop)", "kind": "Video", "description": "Applying current in various directions to a single loop of wire. Primitive electric motor?", "slug": "primitive-electric-motor"}, {"path": "khan/science/discoveries-projects/discoveries/electromagnet/battery-meter-galvanometer/", "id": "S6_7zk_Ht_g", "title": "Battery meter (galvanometer)", "kind": "Video", "description": "Simple device which we can use to measure our homemade batteries. You can test it with any household battery first. What does this deflection represent? What forces are involved?", "slug": "battery-meter-galvanometer"}], "in_knowledge_map": false, "description": "Discoveries leading to the Right Hand rule", "node_slug": "electromagnet", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/discoveries/electromagnet", "extended_slug": "science/discoveries-projects/discoveries/electromagnet", "kind": "Topic", "slug": "electromagnet"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/discoveries/resistance/", "id": "resistance", "hide": false, "title": "Discovery of resistors", "child_data": [{"kind": "Video", "id": "x9996cd00"}, {"kind": "Video", "id": "x65642d70"}, {"kind": "Video", "id": "x90a40960"}, {"kind": "Video", "id": "x68c0a6e6"}], "children": [{"path": "khan/science/discoveries-projects/discoveries/resistance/current-change-due-to-electromagnet-load/", "id": "ZjTS8dBsF4w", "title": "Series load", "kind": "Video", "description": "Why does the deflection change when an electromagnet is attached to the circuit? Does it matter what side of the electromagnet we test?", "slug": "current-change-due-to-electromagnet-load"}, {"path": "khan/science/discoveries-projects/discoveries/resistance/pencil-resistor/", "id": "Y8yga-UzFBY", "title": "Pencil resistor", "kind": "Video", "description": "A pencil causes a change in the deflection, similar to the effect of adding an electromagnet. Why?", "slug": "pencil-resistor"}, {"path": "khan/science/discoveries-projects/discoveries/resistance/variable-resistor-pencil/", "id": "EYlT-9KYPO0", "title": "Variable resistor (pencil)", "kind": "Video", "description": "We use the inside of a pencil (graphite) to apply different \"lengths of pencil\" to the circuit. What relationship do you observe between length of graphite and deflection angle?", "slug": "variable-resistor-pencil"}, {"path": "khan/science/discoveries-projects/discoveries/resistance/listen-to-variable-resistance/", "id": "LsvqEN3XVX4", "title": "Listen to variable resistance", "kind": "Video", "description": "Here we draw a line on a page and use it as a variable resistor in series with a speaker. What relationship do we hear? Does it sound linear?", "slug": "listen-to-variable-resistance"}], "in_knowledge_map": false, "description": "Exploring materials which cause a decrease in deflection when added in series with our meter.", "node_slug": "resistance", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/discoveries/resistance", "extended_slug": "science/discoveries-projects/discoveries/resistance", "kind": "Topic", "slug": "resistance"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/discoveries/electric_motor/", "id": "electric_motor", "hide": false, "title": "Electric motor", "child_data": [{"kind": "Video", "id": "x291987f1"}, {"kind": "Video", "id": "1116719782"}, {"kind": "Article", "id": "1432567466"}], "children": [{"path": "khan/science/discoveries-projects/discoveries/electric_motor/motor-hd-youtube/", "id": "BMvR86gG0Ew", "title": "Spinning compass", "kind": "Video", "description": "By pulsing the connection to the battery we can cause a compass to spin. How is this working?", "slug": "motor-hd-youtube"}, {"path": "khan/science/discoveries-projects/discoveries/electric_motor/build-your-own-motor/", "id": "jabo8iTesqQ", "title": "Build your own motor", "kind": "Video", "description": "In this video we show you how to build a simple motor", "slug": "build-your-own-motor"}], "in_knowledge_map": false, "description": "How can we turn electric current into rotary motion?", "node_slug": "electric_motor", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/discoveries/electric_motor", "extended_slug": "science/discoveries-projects/discoveries/electric_motor", "kind": "Topic", "slug": "electric_motor"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/discoveries/electrostatics/", "id": "electrostatics", "hide": false, "title": "Electrostatics", "child_data": [{"kind": "Video", "id": "1369811787"}, {"kind": "Video", "id": "1391394258"}, {"kind": "Video", "id": "1391264814"}, {"kind": "Video", "id": "1384491099"}], "children": [{"path": "khan/science/discoveries-projects/discoveries/electrostatics/discovery-of-electrostatics/", "id": "Qc9VsH11nzk", "title": "Discovery of triboelectric effect", "kind": "Video", "description": "Our ancestors noticed that when amber was rubbed against fur it attracted small objects...why is this?", "slug": "discovery-of-electrostatics"}, {"path": "khan/science/discoveries-projects/discoveries/electrostatics/pith-ball-electroscope/", "id": "WmTjwOtPibc", "title": "Pith ball electroscope", "kind": "Video", "description": "Primitive device for measuring electrostatic force", "slug": "pith-ball-electroscope"}, {"path": "khan/science/discoveries-projects/discoveries/electrostatics/foil-leaf-electroscope/", "id": "ZfMl8oAL2Rs", "title": "Foil leaf electroscope", "kind": "Video", "description": "Foil Leaf Electroscope. Aluminum leaves repel in the presence of a charged object", "slug": "foil-leaf-electroscope"}, {"path": "khan/science/discoveries-projects/discoveries/electrostatics/history-of-static-electricity-language-of-coins-6-12/", "id": "AurTtzpAr4c", "title": "Electrostatic telegraphs (case study)", "kind": "Video", "description": "Long before the internet people thought about sending information along wires using static electricity.", "slug": "history-of-static-electricity-language-of-coins-6-12"}], "in_knowledge_map": false, "description": "Discovering static electricity & electrostatic force. What is it? How can it be created, detected, and measured?", "node_slug": "electrostatics", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/discoveries/electrostatics", "extended_slug": "science/discoveries-projects/discoveries/electrostatics", "kind": "Topic", "slug": "electrostatics"}], "in_knowledge_map": false, "description": "Rediscover the most important Scientific observations in a historical progression", "node_slug": "discoveries", "render_type": "Topic", "topic_page_url": "/science/discoveries-projects/discoveries", "extended_slug": "science/discoveries-projects/discoveries", "kind": "Topic", "slug": "discoveries"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/science/discoveries-projects/reverse-engin/", "id": "reverse-engin", "hide": false, "title": "Reverse engineering", "child_data": [{"kind": "Topic", "id": "x6b1028eb"}, {"kind": "Topic", "id": "xe3a0d1e9"}, {"kind": "Topic", "id": "x11d48aea"}, {"kind": "Topic", "id": "x69dbdab1"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/reverse-engin/reverse-engineering/", "id": "reverse-engineering", "hide": false, "title": "Household", "child_data": [{"kind": "Video", "id": "1037743580"}, {"kind": "Video", "id": "1037911217"}, {"kind": "Video", "id": "1081270708"}], "children": [{"path": "khan/science/discoveries-projects/reverse-engin/reverse-engineering/what-is-inside-an-alarm-clock-radio-1/", "id": "xuQcB-oo-4U", "title": "What is inside an alarm clock radio?", "kind": "Video", "description": "In this video we explore what is inside an alarm clock, how it is made, and how it works.", "slug": "what-is-inside-an-alarm-clock-radio-1"}, {"path": "khan/science/discoveries-projects/reverse-engin/reverse-engineering/what-is-inside-a-coffee-maker/", "id": "XQTIKNXDAao", "title": "What is inside a coffee maker?", "kind": "Video", "description": "In this video we explore what is inside a coffee maker, how it is made, and how it works.", "slug": "what-is-inside-a-coffee-maker"}, {"path": "khan/science/discoveries-projects/reverse-engin/reverse-engineering/what-is-inside-a-tap-light/", "id": "qLMsZKx_a8s", "title": "What is inside a tap light?", "kind": "Video", "description": "In this video we go inside a tap light to discover what is inside and how it works.", "slug": "what-is-inside-a-tap-light"}], "in_knowledge_map": false, "description": "Other household items you know", "node_slug": "reverse-engineering", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/reverse-engin/reverse-engineering", "extended_slug": "science/discoveries-projects/reverse-engin/reverse-engineering", "kind": "Topic", "slug": "reverse-engineering"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/reverse-engin/hair_dryer/", "id": "hair_dryer", "hide": false, "title": "Hair dryer", "child_data": [{"kind": "Video", "id": "1037778447"}, {"kind": "Video", "id": "1037887285"}, {"kind": "Video", "id": "1115489610"}], "children": [{"path": "khan/science/discoveries-projects/reverse-engin/hair_dryer/what-is-inside-a-hairdryer-1-of-2/", "id": "gFFvaLzhYew", "title": "What is inside a hair dryer? (1 of 2)", "kind": "Video", "description": "In this video we explore ground fault interrupt circuits and how they keep us safe.", "slug": "what-is-inside-a-hairdryer-1-of-2"}, {"path": "khan/science/discoveries-projects/reverse-engin/hair_dryer/what-is-inside-of-a-hair-dryer-2-of-2/", "id": "Vq7EOmvU1eQ", "title": "What is inside a hair dryer? (2 of 2)", "kind": "Video", "description": "In this video we explore what is inside a hairdryer, how it is made, and how it works.", "slug": "what-is-inside-of-a-hair-dryer-2-of-2"}, {"path": "khan/science/discoveries-projects/reverse-engin/hair_dryer/compare-motors/", "id": "V7P2dnrWDeQ", "title": "Compare the hair dryer motor to the one you can build", "kind": "Video", "description": "In this video we compare our hair dryer motor to the motor we built.", "slug": "compare-motors"}], "in_knowledge_map": false, "description": "Hair Dryer", "node_slug": "hair_dryer", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/reverse-engin/hair_dryer", "extended_slug": "science/discoveries-projects/reverse-engin/hair_dryer", "kind": "Topic", "slug": "hair_dryer"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/reverse-engin/dvd_player/", "id": "dvd_player", "hide": false, "title": "DVD player", "child_data": [{"kind": "Video", "id": "1037870720"}, {"kind": "Video", "id": "1037746947"}, {"kind": "Video", "id": "1037719891"}, {"kind": "Video", "id": "1037852423"}, {"kind": "Video", "id": "1037950087"}, {"kind": "Video", "id": "1037941201"}], "children": [{"path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-a-dvd-player-1-of-5/", "id": "9R9vPcPyUwo", "title": "What is inside a DVD player? (1 of 5)", "kind": "Video", "description": "In this video we explore the housing and functions of a DVD player.", "slug": "what-is-inside-a-dvd-player-1-of-5"}, {"path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-a-dvd-player-2-of-5/", "id": "a16uKH2K7gM", "title": "What is inside a DVD player? (2 of 5)", "kind": "Video", "description": "In this video we explore the power supply inside a DVD player.", "slug": "what-is-inside-a-dvd-player-2-of-5"}, {"path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-a-dvd-player-3-of-5/", "id": "8VOcnNekTjw", "title": "What is inside a DVD player? (3 of 5)", "kind": "Video", "description": "In this video we explore the control board inside a DVD player.", "slug": "what-is-inside-a-dvd-player-3-of-5"}, {"path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-of-a-dvd-player-4-of-5/", "id": "axP8LfkPvF0", "title": "What is inside a DVD player? (4 of 5)", "kind": "Video", "description": "In this video we explore the DVD ROM components inside a DVD player.", "slug": "what-is-inside-of-a-dvd-player-4-of-5"}, {"path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-a-dvd-player-5-of-5/", "id": "uQTG0x4qaYs", "title": "What is inside a DVD player? (5 of 5)", "kind": "Video", "description": "In this video we explore the laser assembly inside a DVD player.", "slug": "what-is-inside-a-dvd-player-5-of-5"}, {"path": "khan/science/discoveries-projects/reverse-engin/dvd_player/what-is-inside-of-a-universal-remote-control-1/", "id": "FH1L5NnuDXM", "title": "What is inside a universal remote control?", "kind": "Video", "description": "In this video we explore what is inside a universal remote control, how it is made, and how it works.", "slug": "what-is-inside-of-a-universal-remote-control-1"}], "in_knowledge_map": false, "description": "DVD Player", "node_slug": "dvd_player", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/reverse-engin/dvd_player", "extended_slug": "science/discoveries-projects/reverse-engin/dvd_player", "kind": "Topic", "slug": "dvd_player"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/reverse-engin/digital_camera/", "id": "digital_camera", "hide": false, "title": "Digital camera", "child_data": [{"kind": "Video", "id": "1037927081"}, {"kind": "Video", "id": "1037746795"}], "children": [{"path": "khan/science/discoveries-projects/reverse-engin/digital_camera/what-is-inside-a-digital-camera-1-of-2-1/", "id": "PSy6zQsk8z0", "title": "What is inside a digital camera? (1 of 2)", "kind": "Video", "description": "In this video we go inside the digital camera to discover what is inside and how it works.", "slug": "what-is-inside-a-digital-camera-1-of-2-1"}, {"path": "khan/science/discoveries-projects/reverse-engin/digital_camera/what-is-inside-a-digital-camera-2-of-2/", "id": "DAvEI0rLrAw", "title": "What is inside a digital camera? (2 of 2)", "kind": "Video", "description": "In this video we compare different revisions of the same digital camera.", "slug": "what-is-inside-a-digital-camera-2-of-2"}], "in_knowledge_map": false, "description": "Digital Camera", "node_slug": "digital_camera", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/reverse-engin/digital_camera", "extended_slug": "science/discoveries-projects/reverse-engin/digital_camera", "kind": "Topic", "slug": "digital_camera"}], "in_knowledge_map": false, "description": "Videos exploring the way things work.", "node_slug": "reverse-engin", "render_type": "Topic", "topic_page_url": "/science/discoveries-projects/reverse-engin", "extended_slug": "science/discoveries-projects/reverse-engin", "kind": "Topic", "slug": "reverse-engin"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/projectile_launcher/", "id": "Projectile_launcher", "hide": false, "title": "Projectile launcher", "child_data": [{"kind": "Video", "id": "1065807725"}, {"kind": "Video", "id": "1061773886"}, {"kind": "Video", "id": "1061855678"}], "children": [{"path": "khan/science/discoveries-projects/projectile_launcher/ping-pong-ball-launcher-introduction/", "id": "rrAKZWfhzrE", "title": "Ping pong ball launcher introduction", "kind": "Video", "description": "This video highlights the projectile (ping pong ball) launcher", "slug": "ping-pong-ball-launcher-introduction"}, {"path": "khan/science/discoveries-projects/projectile_launcher/build-a-ping-pong-ball-launcher/", "id": "SlQDuTS6FR4", "title": "Build a ping pong ball launcher", "kind": "Video", "description": "This project shows you how to build a ping pong and test an adjustable ping pong ball launcher.", "slug": "build-a-ping-pong-ball-launcher"}, {"path": "khan/science/discoveries-projects/projectile_launcher/update-and-modify-your-ping-pong-ball-launcher/", "id": "Bdd1Lu5jN08", "title": "Update and modify your ping pong ball launcher", "kind": "Video", "description": "We upgrade our ping pong ball launcher to make it safer, more accurate and more reliable.", "slug": "update-and-modify-your-ping-pong-ball-launcher"}], "in_knowledge_map": false, "description": "", "node_slug": "Projectile_launcher", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/Projectile_launcher", "extended_slug": "science/discoveries-projects/Projectile_launcher", "kind": "Topic", "slug": "projectile_launcher"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/thermo-can/", "id": "thermo-can", "hide": false, "title": "Thermo can", "child_data": [{"kind": "Video", "id": "1079514170"}], "children": [{"path": "khan/science/discoveries-projects/thermo-can/thermo-can/", "id": "UQK7EAgRBpE", "title": "Thermo can", "kind": "Video", "description": "This project shows how to power a boat with a candle.", "slug": "thermo-can"}], "in_knowledge_map": false, "description": "", "node_slug": "thermo-can", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/thermo-can", "extended_slug": "science/discoveries-projects/thermo-can", "kind": "Topic", "slug": "thermo-can"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/discovery-lab-2013/", "id": "discovery-lab-2013", "hide": false, "title": "Discovery Lab 2013", "child_data": [{"kind": "Video", "id": "x314127d3"}, {"kind": "Video", "id": "xa6bd480f"}, {"kind": "Video", "id": "x81ac4903"}, {"kind": "Video", "id": "xd1ac408c"}, {"kind": "Video", "id": "x7f5e95ca"}, {"kind": "Video", "id": "xfe943e48"}, {"kind": "Video", "id": "xffa2786d"}, {"kind": "Video", "id": "xcf2316b4"}, {"kind": "Video", "id": "x2a5f0982"}, {"kind": "Video", "id": "xc4b99373"}, {"kind": "Video", "id": "xa81b682d"}, {"kind": "Video", "id": "xbba4bf3d"}, {"kind": "Video", "id": "xae01ddff"}, {"kind": "Video", "id": "xaff4ad14"}, {"kind": "Video", "id": "xca85182c"}], "children": [{"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-overview/", "id": "evdORkjbVMw", "title": "Khan Academy's Discovery Lab - Summer 2013", "kind": "Video", "description": "Khan Academy ran a hands-on, project-based learning summer program in 2013. We (and the students) had a lot of fun!", "slug": "discovery-lab-overview"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-monty-hall/", "id": "eaHzeFUxSYc", "title": "DLab: Monty Hall simulation", "kind": "Video", "slug": "discovery-lab-monty-hall"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-isocahedron/", "id": "MpiM4C26sbY", "title": "DLab: Building a stellated icosahedron", "kind": "Video", "slug": "discovery-lab-isocahedron"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/lemonade-stand-competitive-markets/", "id": "03fkmtPDhcE", "title": "DLab: Lemonade stand simulation", "kind": "Video", "slug": "lemonade-stand-competitive-markets"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-magician-s-guess/", "id": "Weymq89kwAw", "title": "DLab: Magician's guess simulation", "kind": "Video", "slug": "discovery-lab-magician-s-guess"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-explore-bridge-building/", "id": "LeZsfzlbje4", "title": "DLab: Bridge building project", "kind": "Video", "slug": "discovery-lab-explore-bridge-building"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-2013-build-up-to-bridge-testing/", "id": "T-pMxaKnFx8", "title": "DLab: Build up to bridge testing", "kind": "Video", "slug": "discovery-lab-2013-build-up-to-bridge-testing"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-explore-instructor-reflections/", "id": "XLMs9jqMYOY", "title": "DLab: Instructor reflections on the Explore program", "kind": "Video", "slug": "discovery-lab-explore-instructor-reflections"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-design-building-lego-robots/", "id": "odpzXKZDTt0", "title": "DLab: Inspired by sumo robots", "kind": "Video", "description": "Inspiration from Khan Academy's Discovery Lab", "slug": "discovery-lab-design-building-lego-robots"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-rube-goldberg-the-design-process/", "id": "2WEKGlvcVEw", "title": "DLab: Building a Rube Goldberg machine", "kind": "Video", "slug": "discovery-lab-rube-goldberg-the-design-process"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-spout-bot-builds/", "id": "xV5gCoDUDjY", "title": "DLab: Spout Bot project", "kind": "Video", "slug": "discovery-lab-spout-bot-builds"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-spout-bot-innovation/", "id": "a5uvg9PSJcY", "title": "DLab: Student perspective on the Spout Bot project (1)", "kind": "Video", "slug": "discovery-lab-spout-bot-innovation"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-spout-comes-alive/", "id": "02-uWdzs7o8", "title": "DLab: Student perspective on the Spout Bot project (2)", "kind": "Video", "slug": "discovery-lab-spout-comes-alive"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/spout-instructor-reflections/", "id": "By11dtc-IEo", "title": "DLab: Instructor reflections on the Spout Bot", "kind": "Video", "slug": "spout-instructor-reflections"}, {"path": "khan/science/discoveries-projects/discovery-lab-2013/discovery-lab-exhibition-day/", "id": "n7dI4n-0xGw", "title": "DLab: Exhibition day", "kind": "Video", "slug": "discovery-lab-exhibition-day"}], "in_knowledge_map": false, "description": "", "node_slug": "discovery-lab-2013", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/discovery-lab-2013", "extended_slug": "science/discoveries-projects/discovery-lab-2013", "kind": "Topic", "slug": "discovery-lab-2013"}, {"icon_src": "", "contains": ["Video"], "path": "khan/science/discoveries-projects/discovery-lab-2012/", "id": "Discovery-Lab-2012", "hide": false, "title": "Discovery Lab 2012", "child_data": [{"kind": "Video", "id": "1240687212"}, {"kind": "Video", "id": "x542a201e"}, {"kind": "Video", "id": "x8cbf4715"}, {"kind": "Video", "id": "x13e3c6bf"}, {"kind": "Video", "id": "x2dc81619"}], "children": [{"path": "khan/science/discoveries-projects/discovery-lab-2012/khan-academy-s-discovery-lab-offers-hands-on-learning/", "id": "C6anMRFCt4s", "title": "Khan Academy's Discovery Lab - Summer 2012", "kind": "Video", "description": "We ran a hands-on, project-based learning summer program in 2012. Check out the highlights!", "slug": "khan-academy-s-discovery-lab-offers-hands-on-learning"}, {"path": "khan/science/discoveries-projects/discovery-lab-2012/khan-dl-week-3-vannesa-melvin-greta/", "id": "G8lI6niHjKU", "title": "DLab: Students present their reverse engineering project", "kind": "Video", "slug": "khan-dl-week-3-vannesa-melvin-greta"}, {"path": "khan/science/discoveries-projects/discovery-lab-2012/khan-dl-week-2-philip-and-miles/", "id": "Z-gq3nV2mmM", "title": "DLab: Students present their computer science project", "kind": "Video", "slug": "khan-dl-week-2-philip-and-miles"}, {"path": "khan/science/discoveries-projects/discovery-lab-2012/khan-dl-week-2-arshia/", "id": "HGsg7OZiHhE", "title": "DLab: A student presents her Lego robot", "kind": "Video", "slug": "khan-dl-week-2-arshia"}, {"path": "khan/science/discoveries-projects/discovery-lab-2012/antbots-in-action/", "id": "aQE5PcQQ2b4", "title": "DLab: Students pit their robots against one another", "kind": "Video", "slug": "antbots-in-action"}], "in_knowledge_map": false, "description": "", "node_slug": "Discovery-Lab-2012", "render_type": "Tutorial", "topic_page_url": "/science/discoveries-projects/Discovery-Lab-2012", "extended_slug": "science/discoveries-projects/Discovery-Lab-2012", "kind": "Topic", "slug": "discovery-lab-2012"}], "in_knowledge_map": false, "description": "A collection of hands-on engineering and robotics projects.", "node_slug": "discoveries-projects", "render_type": "Subject", "topic_page_url": "/science/discoveries-projects", "extended_slug": "science/discoveries-projects", "kind": "Topic", "slug": "discoveries-projects"}], "in_knowledge_map": false, "description": "", "node_slug": "science", "render_type": "Domain", "topic_page_url": "/science", "extended_slug": "science", "kind": "Topic", "slug": "science"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/economics-finance-domain/", "id": "economics-finance-domain", "hide": false, "title": "Economics and finance", "child_data": [{"kind": "Topic", "id": "xaacaf77b"}, {"kind": "Topic", "id": "xb796673d"}, {"kind": "Topic", "id": "x7b572fe4"}, {"kind": "Topic", "id": "xae2cab8b"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/microeconomics/", "id": "microeconomics", "hide": false, "title": "Microeconomics", "child_data": [{"kind": "Topic", "id": "x65e6dce0"}, {"kind": "Topic", "id": "x5ff8038a"}, {"kind": "Topic", "id": "x9446d66b"}, {"kind": "Topic", "id": "x7d52cd8b"}, {"kind": "Topic", "id": "x6eb7f0af"}, {"kind": "Topic", "id": "x4e921a04"}, {"kind": "Topic", "id": "x98f0ee09"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/", "id": "supply-demand-equilibrium", "hide": false, "title": "Supply, demand and market equilibrium", "child_data": [{"kind": "Topic", "id": "xd0b6fffd"}, {"kind": "Topic", "id": "xadd5aac6"}, {"kind": "Topic", "id": "x395efef9"}, {"kind": "Topic", "id": "xca0dbed8"}, {"kind": "Topic", "id": "xc434a8f8"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/economics-introduction/", "id": "economics-introduction", "hide": false, "title": "Introduction to economics", "child_data": [{"kind": "Video", "id": "878129397"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/economics-introduction/introduction-to-economics/", "id": "8JYP_wU1JTU", "title": "Introduction to economics", "kind": "Video", "description": "Basic introduction to what microeconomics and macroeconomics study. A bit on Adam Smith.", "slug": "introduction-to-economics"}], "in_knowledge_map": false, "description": "This tutorial (that only has one video) is an overview of what economics is. In particular it will tell you the difference between microeconomics (the subject you're in right now) and macroeconomics. Really good first watch to give you some context on the world of economics.", "node_slug": "economics-introduction", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/supply-demand-equilibrium/economics-introduction", "extended_slug": "economics-finance-domain/microeconomics/supply-demand-equilibrium/economics-introduction", "kind": "Topic", "slug": "economics-introduction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/", "id": "demand-curve-tutorial", "hide": false, "title": "The demand curve", "child_data": [{"kind": "Video", "id": "471262127"}, {"kind": "Video", "id": "471258160"}, {"kind": "Video", "id": "1266634647"}, {"kind": "Video", "id": "471262128"}, {"kind": "Video", "id": "471262131"}, {"kind": "Video", "id": "476379114"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/law-of-demand/", "id": "ShzPtU7IOXs", "title": "Law of demand", "kind": "Video", "description": "Example of the law of demand", "slug": "law-of-demand"}, {"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/price-of-related-products-and-demand/", "id": "-oClpRv7msg", "title": "Price of related products and demand", "kind": "Video", "description": "How changes in the price of related goods can shift demand", "slug": "price-of-related-products-and-demand"}, {"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/change-in-expected-future-prices-and-demand/", "id": "7siSvYs84fg", "title": "Change in expected future prices and demand", "kind": "Video", "slug": "change-in-expected-future-prices-and-demand"}, {"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/changes-in-income-population-or-preferences/", "id": "do1HDIdfQkU", "title": "Changes in income, population, or preferences", "kind": "Video", "description": "How demand can be affected by changes in income, population or preferences", "slug": "changes-in-income-population-or-preferences"}, {"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/normal-and-inferior-goods/", "id": "wYuAwm-5-Bk", "title": "Normal and inferior goods", "kind": "Video", "description": "How the demand for some goods could actually go down if incomes go up", "slug": "normal-and-inferior-goods"}, {"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/inferior-goods-clarification/", "id": "TAhRoJB34nw", "title": "Inferior goods clarification", "kind": "Video", "description": "More clarification on inferior and normal goods", "slug": "inferior-goods-clarification"}], "in_knowledge_map": false, "description": "You've probably heard of supply and demand. Well, this tutorial focuses on the demand part. All else equal, do people want more or less of something if the price goes down (what would you do)? Not only will you get an intuition for the way we typically depict a demand curve, you'll get an understanding for what might shift it.", "node_slug": "demand-curve-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial", "extended_slug": "economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial", "kind": "Topic", "slug": "demand-curve-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/supply-curve-tutorial/", "id": "supply-curve-tutorial", "hide": false, "title": "The supply curve", "child_data": [{"kind": "Video", "id": "476379112"}, {"kind": "Video", "id": "476379111"}, {"kind": "Video", "id": "1266684353"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/supply-curve-tutorial/law-of-supply/", "id": "3xCzhdVtdMI", "title": "Law of supply", "kind": "Video", "description": "Introduction to the Law of Supply", "slug": "law-of-supply"}, {"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/supply-curve-tutorial/factors-affecting-supply/", "id": "0isM0GF-rMI", "title": "Factors affecting supply", "kind": "Video", "description": "How the price of inputs, price of related goods, number of suppliers technology, and expected future prices affects the supply curve", "slug": "factors-affecting-supply"}, {"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/supply-curve-tutorial/long-term-supply-curve-1/", "id": "ahaHgqwt_LA", "title": "Long term supply curve", "kind": "Video", "slug": "long-term-supply-curve-1"}], "in_knowledge_map": false, "description": "Now we'll focus on the \"supply\" part of supply and demand. Supply curves (as we typically depict them) come out of the idea that producers will make more if they get paid more.", "node_slug": "supply-curve-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/supply-demand-equilibrium/supply-curve-tutorial", "extended_slug": "economics-finance-domain/microeconomics/supply-demand-equilibrium/supply-curve-tutorial", "kind": "Topic", "slug": "supply-curve-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/market-equilibrium-tutorial/", "id": "market-equilibrium-tutorial", "hide": false, "title": "Market equilibrium", "child_data": [{"kind": "Video", "id": "476379115"}, {"kind": "Video", "id": "476379113"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/market-equilibrium-tutorial/market-equilibrium/", "id": "PEMkfgrifDw", "title": "Market equilibrium", "kind": "Video", "description": "Equilibrium price and quantity for supply and demand", "slug": "market-equilibrium"}, {"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/market-equilibrium-tutorial/changes-in-market-equilibrium/", "id": "NgPqyM3I_8o", "title": "Changes in market equilibrium", "kind": "Video", "description": "How the equilibrium price or quantity might change due to changes in supply or demand", "slug": "changes-in-market-equilibrium"}], "in_knowledge_map": false, "description": "You understand demand and supply. This tutorial puts it all together by thinking about where the two curves intersect. This point represents the equilibrium price and quantity which is, in an ideal world, where the market would transact.", "node_slug": "market-equilibrium-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/supply-demand-equilibrium/market-equilibrium-tutorial", "extended_slug": "economics-finance-domain/microeconomics/supply-demand-equilibrium/market-equilibrium-tutorial", "kind": "Topic", "slug": "market-equilibrium-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/oil-prices-tutorial/", "id": "oil-prices-tutorial", "hide": false, "title": "What drives oil prices", "child_data": [{"kind": "Video", "id": "679737951"}, {"kind": "Video", "id": "679626793"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/oil-prices-tutorial/breakdown-of-gas-prices/", "id": "1YYy0DEOpoU", "title": "Breakdown of gas prices", "kind": "Video", "description": "Where the dollars at the pump go", "slug": "breakdown-of-gas-prices"}, {"path": "khan/economics-finance-domain/microeconomics/supply-demand-equilibrium/oil-prices-tutorial/short-run-oil-prices/", "id": "ZxtlcZ-d90o", "title": "Short-run oil prices", "kind": "Video", "description": "Thinking about what moves oil prices", "slug": "short-run-oil-prices"}], "in_knowledge_map": false, "description": "This tutorial tries to address a very important question in the real world--what drives oil prices? And we will do it using the tools of the supply and demand curves.", "node_slug": "oil-prices-tutorial", "render_type": "UncuratedTutorial", "topic_page_url": "/economics-finance-domain/microeconomics/supply-demand-equilibrium/oil-prices-tutorial", "extended_slug": "economics-finance-domain/microeconomics/supply-demand-equilibrium/oil-prices-tutorial", "kind": "Topic", "slug": "oil-prices-tutorial"}], "in_knowledge_map": false, "description": "The core ideas in microeconomics. Supply, demand and equilibrium.", "node_slug": "supply-demand-equilibrium", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/microeconomics/supply-demand-equilibrium", "extended_slug": "economics-finance-domain/microeconomics/supply-demand-equilibrium", "kind": "Topic", "slug": "supply-demand-equilibrium"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/", "id": "elasticity-tutorial", "hide": false, "title": "Elasticity", "child_data": [{"kind": "Topic", "id": "x72f1231a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/", "id": "price-elasticity-tutorial", "hide": false, "title": "Price elasticity", "child_data": [{"kind": "Video", "id": "478016839"}, {"kind": "Video", "id": "478016837"}, {"kind": "Video", "id": "478016838"}, {"kind": "Video", "id": "480683235"}, {"kind": "Video", "id": "480690086"}, {"kind": "Video", "id": "480687060"}, {"kind": "Video", "id": "480687059"}, {"kind": "Video", "id": "480687058"}, {"kind": "Video", "id": "482853358"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/price-elasticity-of-demand/", "id": "slP8XZ6Nq40", "title": "Price elasticity of demand", "kind": "Video", "description": "Introduction to price elasticity of demand", "slug": "price-elasticity-of-demand"}, {"path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/more-on-elasticity-of-demand/", "id": "YOT8ryWzwbY", "title": "More on elasticity of demand", "kind": "Video", "description": "Looking a bit deeper at why elasticity changes despite having a linear demand curve", "slug": "more-on-elasticity-of-demand"}, {"path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/perfect-inelasticity-and-perfect-elasticity-of-demand/", "id": "6udRtn5jSWk", "title": "Perfect inelasticity and perfect elasticity of demand", "kind": "Video", "description": "Extreme examples of price elasticity of demand", "slug": "perfect-inelasticity-and-perfect-elasticity-of-demand"}, {"path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/constant-unit-elasticity/", "id": "m7qXvQvWlY4", "title": "Constant unit elasticity", "kind": "Video", "description": "What a demand curve with constant unit elasticity would look like", "slug": "constant-unit-elasticity"}, {"path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/total-revenue-and-elasticity/", "id": "Udltkvm9HLc", "title": "Total revenue and elasticity", "kind": "Video", "description": "Thinking about how total revenue and elasticity are related", "slug": "total-revenue-and-elasticity"}, {"path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/more-on-total-revenue-and-elasticity/", "id": "KgrLUQYgIJE", "title": "More on total revenue and elasticity", "kind": "Video", "description": "Clarification on the relationship between total revenue and elasticity", "slug": "more-on-total-revenue-and-elasticity"}, {"path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/cross-elasticity-of-demand/", "id": "Ngv0Be9NxAw", "title": "Cross elasticity of demand", "kind": "Video", "description": "Price of one good impacting quantity demanded of another", "slug": "cross-elasticity-of-demand"}, {"path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/elasticity-of-supply/", "id": "AAWsuFXojgo", "title": "Elasticity of supply", "kind": "Video", "description": "Thinking about elasticity of supply", "slug": "elasticity-of-supply"}, {"path": "khan/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial/elasticity-and-strange-percent-changes/", "id": "fUxSB3yYIbs", "title": "Elasticity and strange percent changes", "kind": "Video", "description": "Why we calculate percent changes in a strange way when calculating elasticities", "slug": "elasticity-and-strange-percent-changes"}], "in_knowledge_map": false, "description": "You're familiar with supply and demand curves already. In this tutorial we'll explore what implications their steepness (or lack of) implies. Price elasticity is a measure of how sensitive something is to price.", "node_slug": "price-elasticity-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial", "extended_slug": "economics-finance-domain/microeconomics/elasticity-tutorial/price-elasticity-tutorial", "kind": "Topic", "slug": "price-elasticity-tutorial"}], "in_knowledge_map": false, "description": "Price elasticity of demand and supply. How sensitive are things to change in price.", "node_slug": "elasticity-tutorial", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/microeconomics/elasticity-tutorial", "extended_slug": "economics-finance-domain/microeconomics/elasticity-tutorial", "kind": "Topic", "slug": "elasticity-tutorial"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/", "id": "consumer-producer-surplus", "hide": false, "title": "Consumer and producer surplus", "child_data": [{"kind": "Topic", "id": "x4cd4645a"}, {"kind": "Topic", "id": "x1ea2b9b7"}, {"kind": "Topic", "id": "xb4ee7a24"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/consumer-producer-surplus-tut/", "id": "consumer-producer-surplus-tut", "hide": false, "title": "Consumer and producer surplus", "child_data": [{"kind": "Video", "id": "482857607"}, {"kind": "Video", "id": "482869244"}, {"kind": "Video", "id": "491075659"}, {"kind": "Video", "id": "491082769"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/consumer-producer-surplus-tut/demand-curve-as-marginal-benefit-curve/", "id": "KrkbbRxdDZ8", "title": "Demand curve as marginal benefit curve", "kind": "Video", "description": "Thinking about a demand curve in terms of quantity driving price", "slug": "demand-curve-as-marginal-benefit-curve"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/consumer-producer-surplus-tut/consumer-surplus-introduction/", "id": "_6kwhF6hoqQ", "title": "Consumer surplus introduction", "kind": "Video", "description": "Consumer surplus as difference between marginal benefit and price paid", "slug": "consumer-surplus-introduction"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/consumer-producer-surplus-tut/total-consumer-surplus-as-area/", "id": "RBUBIRtn0xQ", "title": "Total consumer surplus as area", "kind": "Video", "description": "Looking at consumer surplus as area between the demand curve and the market price", "slug": "total-consumer-surplus-as-area"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/consumer-producer-surplus-tut/producer-surplus/", "id": "-V-Y5klejSg", "title": "Producer surplus", "kind": "Video", "description": "Looking at the supply curve as an opportunity cost curve. Understanding the producer surplus as the area between the supply curve and the market price", "slug": "producer-surplus"}], "in_knowledge_map": false, "description": "Many times, the equilibrium price is lower than the highest price some folks are willing to pay. For all consumers, this is called consumer surplus. Similarly, the price might be higher than the minimum price at which some are willing to produce. For all the producers, this is called producer surplus. This tutorial covers them both with an emphasis on the visual.", "node_slug": "consumer-producer-surplus-tut", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/consumer-producer-surplus/consumer-producer-surplus-tut", "extended_slug": "economics-finance-domain/microeconomics/consumer-producer-surplus/consumer-producer-surplus-tut", "kind": "Topic", "slug": "consumer-producer-surplus-tut"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/", "id": "deadweight-loss-tutorial", "hide": false, "title": "Deadweight loss", "child_data": [{"kind": "Video", "id": "xf9b67f8e"}, {"kind": "Video", "id": "493579772"}, {"kind": "Video", "id": "498143705"}, {"kind": "Video", "id": "498087754"}, {"kind": "Video", "id": "499815367"}, {"kind": "Video", "id": "499850170"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/rent-control-dead-weight-cost/", "id": "8U8egQjcPaI", "title": "Rent control and deadweight loss", "kind": "Video", "slug": "rent-control-dead-weight-cost"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/minimum-wage-and-price-floors/", "id": "j0c2vmFGbtk", "title": "Minimum wage and price floors", "kind": "Video", "description": "How a minimum wage might effect the labor market", "slug": "minimum-wage-and-price-floors"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/taxation-and-dead-weight-loss/", "id": "NuLlNAdrom4", "title": "Taxation and dead weight loss", "kind": "Video", "description": "The effect of taxation on the equilibrium price and quantity", "slug": "taxation-and-dead-weight-loss"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/percentage-tax-on-hamburgers/", "id": "xwOTlMaerEQ", "title": "Percentage tax on hamburgers", "kind": "Video", "description": "What would happen if we have a percentage tax instead of a fixed dollar amount", "slug": "percentage-tax-on-hamburgers"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/taxes-and-perfectly-inelastic-demand/", "id": "lsn16U5DWD4", "title": "Taxes and perfectly inelastic demand", "kind": "Video", "description": "Who bears the burden for the taxes when demand is inelastic", "slug": "taxes-and-perfectly-inelastic-demand"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial/taxes-and-perfectly-elastic-demand/", "id": "z1yJPpGC3-o", "title": "Taxes and perfectly elastic demand", "kind": "Video", "description": "Who bears the burden for a tax on a good with perfectly elastic demand", "slug": "taxes-and-perfectly-elastic-demand"}], "in_knowledge_map": false, "description": "We can often lose economic efficiency because of things like price floors, ceilings and taxes. This loss in surplus (people who have more marginal benefit than marginal cost are not buying or people who have more marginal cost than benefit are buying) is called deadweight loss.", "node_slug": "deadweight-loss-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial", "extended_slug": "economics-finance-domain/microeconomics/consumer-producer-surplus/deadweight-loss-tutorial", "kind": "Topic", "slug": "deadweight-loss-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/externalities-topic/", "id": "externalities-topic", "hide": false, "title": "Public goods and externalities", "child_data": [{"kind": "Video", "id": "541028298"}, {"kind": "Video", "id": "541028300"}, {"kind": "Video", "id": "541022388"}, {"kind": "Video", "id": "541028296"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/externalities-topic/negative-externalities/", "id": "nBw6KvU51BE", "title": "Negative externalities", "kind": "Video", "description": "Taking negative externalities into account when thinking about the optimal equilibrium price and quantity", "slug": "negative-externalities"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/externalities-topic/taxes-for-factoring-in-negative-externalities/", "id": "UYShebe44Xs", "title": "Taxes for factoring in negative externalities", "kind": "Video", "description": "How to factor in negative externalities through taxation", "slug": "taxes-for-factoring-in-negative-externalities"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/externalities-topic/positive-externalities/", "id": "TSTLLFJbaA4", "title": "Positive externalities", "kind": "Video", "description": "Factoring in external benefits", "slug": "positive-externalities"}, {"path": "khan/economics-finance-domain/microeconomics/consumer-producer-surplus/externalities-topic/tragedy-of-the-commons/", "id": "0b2Tl0x-niw", "title": "Tragedy of the commons", "kind": "Video", "description": "How public resources can be abused", "slug": "tragedy-of-the-commons"}], "in_knowledge_map": false, "description": "In many scenarios thinking only about producers' marginal cost or consumers' marginal benefit does not fully capture *all* of the costs or benefits from the production/use of a product. In this tutorial, we explore these externalities (negative and positive ones) to think a bit deeper about ways to maximize total surplus not just for producers and consumers, but for society as a whole.", "node_slug": "externalities-topic", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/consumer-producer-surplus/externalities-topic", "extended_slug": "economics-finance-domain/microeconomics/consumer-producer-surplus/externalities-topic", "kind": "Topic", "slug": "externalities-topic"}], "in_knowledge_map": false, "description": "", "node_slug": "consumer-producer-surplus", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/microeconomics/consumer-producer-surplus", "extended_slug": "economics-finance-domain/microeconomics/consumer-producer-surplus", "kind": "Topic", "slug": "consumer-producer-surplus"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/", "id": "choices-opp-cost-tutorial", "hide": false, "title": "Scarcity, possibilities, preferences and opportunity cost", "child_data": [{"kind": "Topic", "id": "xc0e82588"}, {"kind": "Topic", "id": "x5c32e1de"}, {"kind": "Topic", "id": "xb24195de"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/", "id": "production-possibilities", "hide": false, "title": "Production possibilities frontier", "child_data": [{"kind": "Video", "id": "469721687"}, {"kind": "Video", "id": "469721684"}, {"kind": "Video", "id": "469721688"}, {"kind": "Video", "id": "469721686"}, {"kind": "Video", "id": "469721683"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/production-possibilities-frontier/", "id": "_7VHfuWV-Qg", "title": "Production possibilities frontier", "kind": "Video", "description": "Tradeoffs for a hunter gatherer and the production possibilities frontier. Ceteris Paribus", "slug": "production-possibilities-frontier"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/opportunity-cost/", "id": "pkEiHZAtoro", "title": "Opportunity cost", "kind": "Video", "description": "Opportunity cost (and marginal cost) based on the PPF", "slug": "opportunity-cost"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/increasing-opportunity-cost/", "id": "00fgAG6VrRQ", "title": "Increasing opportunity cost", "kind": "Video", "description": "Why the opportunity cost may increase as you pursue more rabbits", "slug": "increasing-opportunity-cost"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/allocative-efficiency-and-marginal-benefit/", "id": "MT4akJsAmb0", "title": "Allocative efficiency and marginal benefit", "kind": "Video", "description": "Marginal Utility and maximization", "slug": "allocative-efficiency-and-marginal-benefit"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities/economic-growth-through-investment/", "id": "a9aUMpGs6c8", "title": "Economic growth through investment", "kind": "Video", "description": "How investing for capital formation can expand the production possibilities frontier (PPF)", "slug": "economic-growth-through-investment"}], "in_knowledge_map": false, "description": "This tutorial goes back to the basics. You are a hunter-gatherer with only so much time to hunt or gather. How do you allocate your time and energy to maximize your happiness? This is what we try to understand through our study of the production possibilities frontier and opportunity cost.", "node_slug": "production-possibilities", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities", "extended_slug": "economics-finance-domain/microeconomics/choices-opp-cost-tutorial/production-possibilities", "kind": "Topic", "slug": "production-possibilities"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/gains-from-trade-tutorial/", "id": "gains-from-trade-tutorial", "hide": false, "title": "Comparative advantage and gains from trade", "child_data": [{"kind": "Video", "id": "471262130"}, {"kind": "Video", "id": "471262129"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/gains-from-trade-tutorial/comparative-advantage-specialization-and-gains-from-trade/", "id": "xx9xNJlPOJo", "title": "Comparative advantage specialization and gains from trade", "kind": "Video", "description": "How two parties can get better outcomes by specializing in their comparative advantage and trading", "slug": "comparative-advantage-specialization-and-gains-from-trade"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/gains-from-trade-tutorial/comparative-advantage-and-absolute-advantage/", "id": "xN3UV5FsBkU", "title": "Comparative advantage and absolute advantage", "kind": "Video", "description": "Showing that a party benefits from trade as long as there is a comparative advantage (and not necessarily an absolute advantage)", "slug": "comparative-advantage-and-absolute-advantage"}], "in_knowledge_map": false, "description": "Should you try to produce everything yourself or only what you are best at and trade for everything else? What if you're better than your trading partners at everything? \n\nThis tutorial focuses on comparative advantage, specialization and gains from trade with a microeconomic lens.", "node_slug": "gains-from-trade-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/gains-from-trade-tutorial", "extended_slug": "economics-finance-domain/microeconomics/choices-opp-cost-tutorial/gains-from-trade-tutorial", "kind": "Topic", "slug": "gains-from-trade-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/", "id": "marginal-utility-tutorial", "hide": false, "title": "Marginal utility and budget lines", "child_data": [{"kind": "Video", "id": "505817315"}, {"kind": "Video", "id": "505817316"}, {"kind": "Video", "id": "505808557"}, {"kind": "Video", "id": "508001597"}, {"kind": "Video", "id": "1266170528"}, {"kind": "Video", "id": "508001596"}, {"kind": "Video", "id": "508018310"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/marginal-utility/", "id": "Kf9KhwryQNE", "title": "Marginal utility", "kind": "Video", "description": "Marginal utility and marginal benefit. How you would spend $5 on chocolate and fruit", "slug": "marginal-utility"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/equalizing-marginal-utility-per-dollar-spent/", "id": "KbW6OiuRa1Y", "title": "Equalizing marginal utility per dollar spent", "kind": "Video", "description": "Why the marginal utility for dollar spent should be theoritically equal for the last increment of either good purchased", "slug": "equalizing-marginal-utility-per-dollar-spent"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/deriving-demand-curve-from-tweaking-marginal-utility-per-dollar/", "id": "4-_-wQc3EGE", "title": "Deriving demand curve from tweaking marginal utility per dollar", "kind": "Video", "description": "Seeing what happens to quantity demanded when price changes", "slug": "deriving-demand-curve-from-tweaking-marginal-utility-per-dollar"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/budget-line/", "id": "Uq5Wzs96tiw", "title": "Budget line", "kind": "Video", "description": "What I can buy with my income", "slug": "budget-line"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/indifference-curves-and-marginal-rate-of-substitution/", "id": "7G4BUm7M6MY", "title": "Indifference curves and marginal rate of substitution", "kind": "Video", "slug": "indifference-curves-and-marginal-rate-of-substitution"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/optimal-point-on-budget-line/", "id": "nhSSu0Nzs30", "title": "Optimal point on budget line", "kind": "Video", "description": "Using indifference curves to think about the point on the budget line that maximizes total utility", "slug": "optimal-point-on-budget-line"}, {"path": "khan/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial/types-of-indifference-curves/", "id": "kJ43GdU5Uzc", "title": "Types of indifference curves", "kind": "Video", "description": "Indifference curves for normal goods, substitutes and perfect complements", "slug": "types-of-indifference-curves"}], "in_knowledge_map": false, "description": "In this tutorial we look at the utility of getting one more of something and put numbers to it. We then use this to construct a budget line and think about indifference curves.", "node_slug": "marginal-utility-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial", "extended_slug": "economics-finance-domain/microeconomics/choices-opp-cost-tutorial/marginal-utility-tutorial", "kind": "Topic", "slug": "marginal-utility-tutorial"}], "in_knowledge_map": false, "description": "How do you decide what to produce or trade? How can you maximize happiness in a world of scarcity. What are you giving up when you choose something (i.e., opportunity cost)?", "node_slug": "choices-opp-cost-tutorial", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/microeconomics/choices-opp-cost-tutorial", "extended_slug": "economics-finance-domain/microeconomics/choices-opp-cost-tutorial", "kind": "Topic", "slug": "choices-opp-cost-tutorial"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/", "id": "firm-economic-profit", "hide": false, "title": "Production decisions and economic profit", "child_data": [{"kind": "Topic", "id": "xa79df62a"}, {"kind": "Topic", "id": "xdb1ec44f"}, {"kind": "Topic", "id": "x11d8123f"}, {"kind": "Topic", "id": "xda2c5181"}, {"kind": "Topic", "id": "xd32ce9ca"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/economic-profit-tutorial/", "id": "economic-profit-tutorial", "hide": false, "title": "Economic profit and opportunity cost", "child_data": [{"kind": "Video", "id": "510581042"}, {"kind": "Video", "id": "512959991"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/economic-profit-tutorial/economic-profit-vs-accounting-profit/", "id": "06j_zPdPWOY", "title": "Economic profit vs accounting profit", "kind": "Video", "description": "Difference between a firm's accounting and economic profit", "slug": "economic-profit-vs-accounting-profit"}, {"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/economic-profit-tutorial/depreciation-and-opportunity-cost-of-capital/", "id": "ckBKDrKVIMU", "title": "Depreciation and opportunity cost of capital", "kind": "Video", "description": "How to account for things when you own the building instead of renting it", "slug": "depreciation-and-opportunity-cost-of-capital"}], "in_knowledge_map": false, "description": "Economic profit and accounting profit are two different things (the difference being that economic profit takes into account opportunity cost). Confused? This tutorial lays it all out with the example of a restaurant.", "node_slug": "economic-profit-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/firm-economic-profit/economic-profit-tutorial", "extended_slug": "economics-finance-domain/microeconomics/firm-economic-profit/economic-profit-tutorial", "kind": "Topic", "slug": "economic-profit-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-margin-rev/", "id": "average-costs-margin-rev", "hide": false, "title": "Average costs (ATC, MC) and marginal revenue (MR)", "child_data": [{"kind": "Video", "id": "521284922"}, {"kind": "Video", "id": "521284923"}, {"kind": "Video", "id": "521326286"}, {"kind": "Video", "id": "523817786"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-margin-rev/marginal-cost-and-average-total-cost/", "id": "7t8gdc3YogM", "title": "Marginal cost and average total cost", "kind": "Video", "description": "Looking at marginal and average total cost in the context of a juice business", "slug": "marginal-cost-and-average-total-cost"}, {"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-margin-rev/marginal-revenue-and-marginal-cost/", "id": "xGkE0oHyNhk", "title": "Marginal revenue and marginal cost", "kind": "Video", "description": "Thinking about a rational quantity of juice to produce", "slug": "marginal-revenue-and-marginal-cost"}, {"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-margin-rev/marginal-revenue-below-average-total-cost/", "id": "ni0TL4pXG5w", "title": "Marginal revenue below average total cost", "kind": "Video", "description": "Why it is rational to produce at a loss", "slug": "marginal-revenue-below-average-total-cost"}, {"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-margin-rev/long-term-supply-curve-and-economic-profit/", "id": "CWiHA5XtqgU", "title": "Long term supply curve and economic profit", "kind": "Video", "description": "Understanding the long term supply curve in terms of economic profit", "slug": "long-term-supply-curve-and-economic-profit"}], "in_knowledge_map": false, "description": "In this tutorial, Sal uses the example of an orange juice business to help us understand the ideas of average total cost (ATC), marginal cost (MC) and marginal revenue (MR). We then use this understanding to answer the age-old question, \"how much orange juice should I produce?\" Finally, we use these ideas to construct a long-run supply curve. A must watch if you're interested in making juice!", "node_slug": "average-costs-margin-rev", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-margin-rev", "extended_slug": "economics-finance-domain/microeconomics/firm-economic-profit/average-costs-margin-rev", "kind": "Topic", "slug": "average-costs-margin-rev"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-tutorial/", "id": "average-costs-tutorial", "hide": false, "title": "Average fixed, variable and marginal costs", "child_data": [{"kind": "Video", "id": "514726534"}, {"kind": "Video", "id": "521326287"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-tutorial/fixed-variable-and-marginal-cost/", "id": "bBQVaRnHqLs", "title": "Fixed, variable, and marginal cost", "kind": "Video", "description": "Thinking about average fixed, variable and marginal cost", "slug": "fixed-variable-and-marginal-cost"}, {"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-tutorial/visualizing-average-costs-and-marginal-costs-as-slope/", "id": "k1iHDu9GrJE", "title": "Visualizing average costs and marginal costs as slope", "kind": "Video", "description": "Graphing variable cost, fixed cost and total cost", "slug": "visualizing-average-costs-and-marginal-costs-as-slope"}], "in_knowledge_map": false, "description": "Using a spreadsheet, Sal walks through an example of average costs per line of code as a firm hires more engineers. Really good primer to understand what average fixed costs, average variable costs, average total costs (ATC) and average marginal costs (MC) are (and how they are calculated).", "node_slug": "average-costs-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-tutorial", "extended_slug": "economics-finance-domain/microeconomics/firm-economic-profit/average-costs-tutorial", "kind": "Topic", "slug": "average-costs-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/labor-marginal-product-rev/", "id": "labor-marginal-product-rev", "hide": false, "title": "Labor and marginal product revenue", "child_data": [{"kind": "Video", "id": "544764167"}, {"kind": "Video", "id": "544732566"}, {"kind": "Video", "id": "544749484"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/labor-marginal-product-rev/a-firm-s-marginal-product-revenue-curve/", "id": "cwClnv9Y1Y0", "title": "A firm's marginal product revenue curve", "kind": "Video", "description": "Thinking about how much incremental benefit a firm gets from hiring one more person", "slug": "a-firm-s-marginal-product-revenue-curve"}, {"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/labor-marginal-product-rev/how-many-people-to-hire-given-the-mpr-curve/", "id": "p8PSIpMkEvA", "title": "How many people to hire given the MPR curve", "kind": "Video", "description": "Thinking about how many people it makes sense to hire. Brief discussion of a monopsony.", "slug": "how-many-people-to-hire-given-the-mpr-curve"}, {"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/labor-marginal-product-rev/adding-demand-curves/", "id": "gHs3zuRek7o", "title": "Adding demand curves", "kind": "Video", "description": "How to add demand curves", "slug": "adding-demand-curves"}], "in_knowledge_map": false, "description": "Constructing a demand curve for an individual firm by thinking about how much increment benefit they get from an incremental employee (marginal product of labor (MPL) and marginal product revenue (MPR). We later think about how we can add these \"demand\" curves to construct a \"demand\" curve for the market for labor in this industry.", "node_slug": "labor-marginal-product-rev", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/firm-economic-profit/labor-marginal-product-rev", "extended_slug": "economics-finance-domain/microeconomics/firm-economic-profit/labor-marginal-product-rev", "kind": "Topic", "slug": "labor-marginal-product-rev"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/price-discrimination-tutorial/", "id": "price-discrimination-tutorial", "hide": false, "title": "Price discrimination", "child_data": [{"kind": "Video", "id": "541028301"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/firm-economic-profit/price-discrimination-tutorial/first-degree-price-discrimination/", "id": "z0wg9ZPyL38", "title": "First degree price discrimination", "kind": "Video", "description": "Charging different consumers different amounts in an attempt to optimize economic profit", "slug": "first-degree-price-discrimination"}], "in_knowledge_map": false, "description": "This short tutorial explores how a wine business can utilize first-degree price discrimination to maximize economic profit (it uses many of the ideas we've explored in the rest of this tutorial).", "node_slug": "price-discrimination-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/firm-economic-profit/price-discrimination-tutorial", "extended_slug": "economics-finance-domain/microeconomics/firm-economic-profit/price-discrimination-tutorial", "kind": "Topic", "slug": "price-discrimination-tutorial"}], "in_knowledge_map": false, "description": "Economic profit vs. accounting profit. Average total cost (ATC) and marginal cost (MC). Marginal product of labor (MPL). Price discrimination.", "node_slug": "firm-economic-profit", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/microeconomics/firm-economic-profit", "extended_slug": "economics-finance-domain/microeconomics/firm-economic-profit", "kind": "Topic", "slug": "firm-economic-profit"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/", "id": "perfect-competition-topic", "hide": false, "title": "Forms of competition", "child_data": [{"kind": "Topic", "id": "x64a13d33"}, {"kind": "Topic", "id": "x1ea3627a"}, {"kind": "Topic", "id": "x9e434ffa"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/perfect-competition/", "id": "perfect-competition", "hide": false, "title": "Perfect competition", "child_data": [{"kind": "Video", "id": "523902405"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/perfect-competition/perfect-competition/", "id": "_NznT4Cn8As", "title": "Perfect competition", "kind": "Video", "description": "Conditions for perfect competition. Looking at the airline industry", "slug": "perfect-competition"}], "in_knowledge_map": false, "description": "This tutorial looks at markets that are deemed to have \"perfect competition.\" This means that there are many players with identical products, no barriers to entry, no advantage for existing players and good pricing information. Few to no real market completely matches this theoretical ideal, but many are close. Even the example we use in this tutorial (the airline industry) isn't quite perfect (you should think about why).", "node_slug": "perfect-competition", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/perfect-competition-topic/perfect-competition", "extended_slug": "economics-finance-domain/microeconomics/perfect-competition-topic/perfect-competition", "kind": "Topic", "slug": "perfect-competition"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/", "id": "monopolies-tutorial", "hide": false, "title": "Monopoly", "child_data": [{"kind": "Video", "id": "523878000"}, {"kind": "Video", "id": "526475273"}, {"kind": "Video", "id": "526475275"}, {"kind": "Video", "id": "526475274"}, {"kind": "Video", "id": "526475276"}, {"kind": "Video", "id": "1266250654"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/monopoly-basics/", "id": "77CApfQlTuE", "title": "Monopoly basics", "kind": "Video", "description": "Thinking about what would happen with one airline. The opposite of perfect competition", "slug": "monopoly-basics"}, {"path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/monopolist-optimizing-price-part-1-total-revenue/", "id": "cczABrLd_uA", "title": "Monopolist optimizing price: Total revenue.", "kind": "Video", "description": "Starting to think about how a monopolist would rationally optimize profits", "slug": "monopolist-optimizing-price-part-1-total-revenue"}, {"path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/monopolist-optimizing-price-part-2-marginal-revenue/", "id": "s1UQQELPyrc", "title": "Monopolist optimizing price: Marginal revenue", "kind": "Video", "description": "Plotting the marginal revenue curve for a monopolist", "slug": "monopolist-optimizing-price-part-2-marginal-revenue"}, {"path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/monopolist-optimizing-price-part-3-dead-weight-loss-avi/", "id": "daxL1ZLrUzg", "title": "Monopolist optimizing price: Dead weight loss", "kind": "Video", "description": "Showing that what is optimal for the monopolist is not optimal for society", "slug": "monopolist-optimizing-price-part-3-dead-weight-loss-avi"}, {"path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/optional-calculus-proof-to-show-that-mr-has-twice-slope-of-demand/", "id": "atI4QH2acuw", "title": "Optional calculus proof to show that MR has twice slope of demand", "kind": "Video", "description": "Using some basic calculus to show that marginal revenue has twice the slope of the demand curve for a monopolist", "slug": "optional-calculus-proof-to-show-that-mr-has-twice-slope-of-demand"}, {"path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial/review-of-revenue-and-cost-graphs-for-a-monopoly-1/", "id": "A_lV-XArVeE", "title": "Review of revenue and cost graphs for a monopoly", "kind": "Video", "slug": "review-of-revenue-and-cost-graphs-for-a-monopoly-1"}], "in_knowledge_map": false, "description": "No, we aren't talking about the board game although the game does try to approximate what this tutorial is about--notice that you can charge more rent at either Boardwalk or Park Place if you own both (you have a \"monopoly\" in the navy blue market).\n\nThe opposite of perfect competition is when you have only one firm operating. This tutorial explores what this firm would do to maximize economic profit.", "node_slug": "monopolies-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial", "extended_slug": "economics-finance-domain/microeconomics/perfect-competition-topic/monopolies-tutorial", "kind": "Topic", "slug": "monopolies-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolistic-competition-oligop/", "id": "monopolistic-competition-oligop", "hide": false, "title": "Between perfect competition and monopoly", "child_data": [{"kind": "Video", "id": "529106152"}, {"kind": "Video", "id": "541028299"}, {"kind": "Video", "id": "531245092"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolistic-competition-oligop/oligopolies-and-monopolisitc-competition/", "id": "PzDthFTzEa0", "title": "Oligopolies and monopolistic competition", "kind": "Video", "description": "Thinking about different markets that are in-between monopolies and perfect competition", "slug": "oligopolies-and-monopolisitc-competition"}, {"path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolistic-competition-oligop/monopolistic-competition-and-economic-profit/", "id": "RUVsEovktGU", "title": "Monopolistic competition and economic profit", "kind": "Video", "description": "Why it is hard for a monopolisitc competitor to make economic profit in the long run", "slug": "monopolistic-competition-and-economic-profit"}, {"path": "khan/economics-finance-domain/microeconomics/perfect-competition-topic/monopolistic-competition-oligop/oligopolies-duopolies-collusion-and-cartels/", "id": "N0L00FZnhtg", "title": "Oligopolies, duopolies, collusion, and cartels", "kind": "Video", "description": "Thinking about when oligopolies behave more like monopolies or perfect competitors", "slug": "oligopolies-duopolies-collusion-and-cartels"}], "in_knowledge_map": false, "description": "Most markets sit somewhere in-between perfect competition and monopolies. This tutorial explores some of those scenarios--from monopolistic competition to oligopolies and duopolies.", "node_slug": "monopolistic-competition-oligop", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/perfect-competition-topic/monopolistic-competition-oligop", "extended_slug": "economics-finance-domain/microeconomics/perfect-competition-topic/monopolistic-competition-oligop", "kind": "Topic", "slug": "monopolistic-competition-oligop"}], "in_knowledge_map": false, "description": "", "node_slug": "perfect-competition-topic", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/microeconomics/perfect-competition-topic", "extended_slug": "economics-finance-domain/microeconomics/perfect-competition-topic", "kind": "Topic", "slug": "perfect-competition-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/", "id": "nash-equilibrium-tutorial", "hide": false, "title": "Game theory and Nash equilibrium", "child_data": [{"kind": "Topic", "id": "x7ddeb5da"}, {"kind": "Topic", "id": "xdd95203a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/nash-eq-tutorial/", "id": "nash-eq-tutorial", "hide": false, "title": "Nash equilibrium", "child_data": [{"kind": "Video", "id": "531245090"}, {"kind": "Video", "id": "531245089"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/nash-eq-tutorial/prisoners-dilemma-and-nash-equilibrium/", "id": "UkXI-zPcDIM", "title": "Prisoners' dilemma and Nash equilibrium", "kind": "Video", "description": "Why two not-so-loyal criminals would want to snitch each other out", "slug": "prisoners-dilemma-and-nash-equilibrium"}, {"path": "khan/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/nash-eq-tutorial/more-on-nash-equilibrium/", "id": "ewu_7Dmj_18", "title": "More on Nash equilibrium", "kind": "Video", "description": "Looking more closely at the definition of Nash Equilibrium", "slug": "more-on-nash-equilibrium"}], "in_knowledge_map": false, "description": "If you haven't watched the movie \"A Beautiful Mind\", you should. It is about John Nash (played by Russell Crowe) who won the Nobel Prize in economics for his foundational contributions to game theory. This is what this tutorial is about.\n\nNash put some structure around how players in a \"game\" can optimize their outcomes (if the movie is to be fully believed, this insight struck him when he realized that if all his friends hit on the most pretty girl, he should hit on the second-most pretty one). In this tutorial, we use the classic \"prisoner's dilemma\" to highlight this concept.", "node_slug": "nash-eq-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/nash-eq-tutorial", "extended_slug": "economics-finance-domain/microeconomics/nash-equilibrium-tutorial/nash-eq-tutorial", "kind": "Topic", "slug": "nash-eq-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/cartels-cheat-tutorial/", "id": "cartels-cheat-tutorial", "hide": false, "title": "Why parties in a cartel will cheat", "child_data": [{"kind": "Video", "id": "541028297"}, {"kind": "Video", "id": "541022390"}], "children": [{"path": "khan/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/cartels-cheat-tutorial/why-parties-to-cartels-cheat/", "id": "S6TvRDwgQag", "title": "Why parties to cartels cheat", "kind": "Video", "description": "Why duopolists would benefit to form a cartel and why it makes sense for them to cheat", "slug": "why-parties-to-cartels-cheat"}, {"path": "khan/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/cartels-cheat-tutorial/game-theory-of-cheating-firms/", "id": "XTMbRDRaviM", "title": "Game theory of cheating firms", "kind": "Video", "description": "Pareto Optimality and more on Nash Equilibrium. Seeing how cheating duopolists parallels the prisoners dilemma", "slug": "game-theory-of-cheating-firms"}], "in_knowledge_map": false, "description": "You know what Nash equilibrium is (from the other tutorial). Now we apply it to a scenario that is fairly realistic--parties to a cartel cheating.\n\nA cartel is a group of actors that agree (sometimes illegally) to coordinate their production/pricing to maximize their collective economic profit. What we will see, however, is that this is not a \"Pareto optimal\" state and they will soon start producing more than agreed on.", "node_slug": "cartels-cheat-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/cartels-cheat-tutorial", "extended_slug": "economics-finance-domain/microeconomics/nash-equilibrium-tutorial/cartels-cheat-tutorial", "kind": "Topic", "slug": "cartels-cheat-tutorial"}], "in_knowledge_map": false, "description": "", "node_slug": "nash-equilibrium-tutorial", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/microeconomics/nash-equilibrium-tutorial", "extended_slug": "economics-finance-domain/microeconomics/nash-equilibrium-tutorial", "kind": "Topic", "slug": "nash-equilibrium-tutorial"}], "in_knowledge_map": false, "description": "Topics covered in a traditional college level introductory microeconomics course", "node_slug": "microeconomics", "render_type": "Subject", "topic_page_url": "/economics-finance-domain/microeconomics", "extended_slug": "economics-finance-domain/microeconomics", "kind": "Topic", "slug": "microeconomics"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/macroeconomics/", "id": "macroeconomics", "hide": false, "title": "Macroeconomics", "child_data": [{"kind": "Topic", "id": "x9609cd6e"}, {"kind": "Topic", "id": "xde55f2b6"}, {"kind": "Topic", "id": "x5a26f530"}, {"kind": "Topic", "id": "xba092826"}, {"kind": "Topic", "id": "x9bf02cd2"}, {"kind": "Topic", "id": "xc30c12c0"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/", "id": "gdp-topic", "hide": false, "title": "GDP: Measuring national income", "child_data": [{"kind": "Topic", "id": "x4d68fee2"}, {"kind": "Topic", "id": "xf77c6d98"}, {"kind": "Topic", "id": "x103b8fc5"}, {"kind": "Topic", "id": "xd70d7b87"}, {"kind": "Topic", "id": "x4afc1cf2"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/econ-intro-in-macro-tutorial/", "id": "econ-intro-in-macro-tutorial", "hide": false, "title": "Introduction to economics", "child_data": [{"kind": "Video", "id": "878129397"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/econ-intro-in-macro-tutorial/introduction-to-economics/", "id": "8JYP_wU1JTU", "title": "Introduction to economics", "kind": "Video", "description": "Basic introduction to what microeconomics and macroeconomics study. A bit on Adam Smith.", "slug": "introduction-to-economics"}], "in_knowledge_map": false, "description": "This very short tutorial gives us the big picture of what economics is all about and, in particular, compares macroeconomics (where you are now) to microeconomics.", "node_slug": "econ-intro-in-macro-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/gdp-topic/econ-intro-in-macro-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/gdp-topic/econ-intro-in-macro-tutorial", "kind": "Topic", "slug": "econ-intro-in-macro-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/circular-econ-gdp-tutorial/", "id": "circular-econ-gdp-tutorial", "hide": false, "title": "GDP and the circular flow of income and expenditures", "child_data": [{"kind": "Video", "id": "544749483"}, {"kind": "Video", "id": "544764168"}, {"kind": "Video", "id": "544749482"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/circular-econ-gdp-tutorial/circular-flow-of-income-and-expenditures/", "id": "Hfz1bwK5C4o", "title": "Circular flow of income and expenditures", "kind": "Video", "description": "Understanding the flow of resources in the simplest possible economy", "slug": "circular-flow-of-income-and-expenditures"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/circular-econ-gdp-tutorial/parsing-gross-domestic-product/", "id": "zh8XASZxo1Q", "title": "Parsing gross domestic product", "kind": "Video", "description": "Understanding what GDP does and doesn't measure.", "slug": "parsing-gross-domestic-product"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/circular-econ-gdp-tutorial/more-on-final-and-intermediate-gdp-contributions/", "id": "C1pHvEAKmLA", "title": "More on final and intermediate GDP contributions", "kind": "Video", "description": "What happens when a good is not finished in a period", "slug": "more-on-final-and-intermediate-gdp-contributions"}], "in_knowledge_map": false, "description": "Economics can some times get confusing because one person's expenditure is another person's income which can then be used for expenditure and on and on and on. Seems very circular. It is.\n\nThis tutorial helps us grapple with this and introduces us to the primary tool economists use to measure a nations productivity/income/expenditure--GDP (gross domestic product).", "node_slug": "circular-econ-gdp-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/gdp-topic/circular-econ-gdp-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/gdp-topic/circular-econ-gdp-tutorial", "kind": "Topic", "slug": "circular-econ-gdp-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/gdp-components-tutorial/", "id": "GDP-components-tutorial", "hide": false, "title": "Components of GDP", "child_data": [{"kind": "Video", "id": "575644951"}, {"kind": "Video", "id": "575652928"}, {"kind": "Video", "id": "575808122"}, {"kind": "Video", "id": "575644967"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/gdp-components-tutorial/investment-and-consumption/", "id": "N9VIsauE0RA", "title": "Investment and consumption", "kind": "Video", "description": "Difference between every day and economic notions of investment and consumption", "slug": "investment-and-consumption"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/gdp-components-tutorial/income-and-expenditure-views-of-gdp/", "id": "Z9b8nnvpim0", "title": "Income and expenditure views of GDP", "kind": "Video", "description": "Looking at a simple model of an economy", "slug": "income-and-expenditure-views-of-gdp"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/gdp-components-tutorial/components-of-gdp/", "id": "Rgr1vRjxzFg", "title": "Components of GDP", "kind": "Video", "description": "Understanding the components of the expenditure view of GDP. Consumption, investment, government spending and net exports", "slug": "components-of-gdp"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/gdp-components-tutorial/examples-of-accounting-for-gdp/", "id": "BMNj7-Okclk", "title": "Examples of accounting for GDP", "kind": "Video", "description": "Thinking about how different types of expenditures would be accounted for in GDP", "slug": "examples-of-accounting-for-gdp"}], "in_knowledge_map": false, "description": "You already understand the circular nature of the economy and how GDP is defined from the last tutorial. Now let's think about how economists define the composition of GDP. In particular, we'll focus on consumption (C), investment (I), government spending (G) and net exports.", "node_slug": "GDP-components-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/gdp-topic/GDP-components-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/gdp-topic/GDP-components-tutorial", "kind": "Topic", "slug": "gdp-components-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/real-nominal-gdp-tutorial/", "id": "real-nominal-gdp-tutorial", "hide": false, "title": "Real and nominal GDP", "child_data": [{"kind": "Video", "id": "575686801"}, {"kind": "Video", "id": "575750454"}, {"kind": "Video", "id": "575654968"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/real-nominal-gdp-tutorial/real-gdp-and-nominal-gdp/", "id": "lBDT2w5Wl84", "title": "Real GDP and nominal GDP", "kind": "Video", "description": "Using real GDP as a measure of actual productivity growth", "slug": "real-gdp-and-nominal-gdp"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/real-nominal-gdp-tutorial/gdp-deflator/", "id": "L-0LuSw2bTM", "title": "GDP deflator", "kind": "Video", "description": "Relationship between the GDP deflator, nominal GDP and real GDP", "slug": "gdp-deflator"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/real-nominal-gdp-tutorial/example-calculating-real-gdp-with-a-deflator/", "id": "v5YT8GlSxoU", "title": "Example calculating real GDP with a deflator", "kind": "Video", "description": "Simple example of calculating Real GDP from Nominal GDP", "slug": "example-calculating-real-gdp-with-a-deflator"}], "in_knowledge_map": false, "description": "The value of a currency is constantly changing (usually going down in terms of what you can buy). Given this, how can we compare GDP measured in dollars in one year to another year? This tutorial answers that question by introducing you to real GDP and GDP deflators.", "node_slug": "real-nominal-gdp-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/gdp-topic/real-nominal-gdp-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/gdp-topic/real-nominal-gdp-tutorial", "kind": "Topic", "slug": "real-nominal-gdp-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/", "id": "piketty-capital", "hide": false, "title": "National income and inequality", "child_data": [{"kind": "Video", "id": "x2414826f"}, {"kind": "Video", "id": "x0bc50ea1"}, {"kind": "Video", "id": "xbfdbec54"}, {"kind": "Video", "id": "x1ad310a6"}, {"kind": "Video", "id": "x8bab2ad5"}, {"kind": "Video", "id": "x4dae3a1c"}, {"kind": "Video", "id": "x69735d08"}, {"kind": "Video", "id": "x87f87300"}, {"kind": "Video", "id": "x3377d260"}, {"kind": "Video", "id": "x7002b102"}, {"kind": "Video", "id": "x11572ad8"}, {"kind": "Video", "id": "xb07adf0f"}, {"kind": "Video", "id": "x153bfa38"}, {"kind": "Video", "id": "x225f691c"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/piketty-capital/", "id": "i78cyClvaeg", "title": "Capital by Thomas Piketty", "kind": "Video", "slug": "piketty-capital"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/wealth-vs-income/", "id": "o5-T52bh-eQ", "title": "Difference between wealth and income", "kind": "Video", "slug": "wealth-vs-income"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/what-is-capital/", "id": "-epr8lPIZYE", "title": "What is capital?", "kind": "Video", "slug": "what-is-capital"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/two-forces-divergence/", "id": "ZmqK0X1psDA", "title": "Piketty's two drivers of divergence", "kind": "Video", "slug": "two-forces-divergence"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/inequality-good-or-bad/", "id": "r5L-riaIJjI", "title": "Is rising inequality necessarily bad?", "kind": "Video", "slug": "inequality-good-or-bad"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/convergence-macro/", "id": "scgd0gh6BFs", "title": "Convergence on macro scale", "kind": "Video", "slug": "convergence-macro"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/education-equality/", "id": "Qu7aVEUc-2w", "title": "Education as a force of convergence", "kind": "Video", "slug": "education-equality"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/gilded-age-silicon-valley/", "id": "GQBRWjHdir0", "title": "Gilded Age versus Silicon Valley", "kind": "Video", "slug": "gilded-age-silicon-valley"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/price-return-relationship/", "id": "gplD1LV-lAA", "title": "Inverse relationship between capital price and returns", "kind": "Video", "slug": "price-return-relationship"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/income-inequality/", "id": "iPROoc_o0p8", "title": "Connecting income to capital growth and potential inequality", "kind": "Video", "slug": "income-inequality"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/r-greater-than-g/", "id": "w6O2Rxub6VE", "title": "r greater than g but less inequality", "kind": "Video", "slug": "r-greater-than-g"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/r-greater-but-less-inequality/", "id": "ir-ISPDjGno", "title": "Return on capital and economic growth", "kind": "Video", "slug": "r-greater-but-less-inequality"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/roc-and-economic-growth/", "id": "mkyPZjkdU2Q", "title": "Critically looking at data on ROC and economic growth over millenia", "kind": "Video", "slug": "roc-and-economic-growth"}, {"path": "khan/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital/piketty-spreadsheet-1/", "id": "--VYlmbkzNY", "title": "Simple model to understand r and g relationship", "kind": "Video", "slug": "piketty-spreadsheet-1"}], "in_knowledge_map": false, "description": "In this tutorial we will dig a bit into Thomas Piketty's popular \"Capital in the 21st Century\" that attempts to analyze the relationship(s) between economic growth, returns on capital and inequality. Our intent is to neither argue for nor against the ideas in the book, but rather use it as a tool for critical reasoning and discourse.", "node_slug": "piketty-capital", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/gdp-topic/piketty-capital", "extended_slug": "economics-finance-domain/macroeconomics/gdp-topic/piketty-capital", "kind": "Topic", "slug": "piketty-capital"}], "in_knowledge_map": false, "description": "Circular flow of income and expenditure. Gross domestic product.", "node_slug": "gdp-topic", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/macroeconomics/gdp-topic", "extended_slug": "economics-finance-domain/macroeconomics/gdp-topic", "kind": "Topic", "slug": "gdp-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/macroeconomics/inflation-topic/", "id": "inflation-topic", "hide": false, "title": "Inflation - measuring the cost of living", "child_data": [{"kind": "Topic", "id": "x24ca4b8b"}, {"kind": "Topic", "id": "x4dbedff0"}, {"kind": "Topic", "id": "xf379f77d"}, {"kind": "Topic", "id": "x9955e0d0"}, {"kind": "Topic", "id": "x56be3c9a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/inflation-topic/cost-of-living-tutorial/", "id": "cost-of-living-tutorial", "hide": false, "title": "Measuring cost of living --inflation and the consumer price index", "child_data": [{"kind": "Video", "id": "575703733"}, {"kind": "Video", "id": "575694762"}, {"kind": "Video", "id": "167407349"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/cost-of-living-tutorial/introduction-to-inflation/", "id": "AaR1mPrdbTc", "title": "Introduction to inflation", "kind": "Video", "description": "Basics of price inflation and the CPI (consumer price index)", "slug": "introduction-to-inflation"}, {"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/cost-of-living-tutorial/actual-cpi-u-basket-of-goods/", "id": "-JTw7gNwT6Y", "title": "Actual CPI-U basket of goods", "kind": "Video", "description": "Exploring the actual weightings for the CPI-U basket of goods", "slug": "actual-cpi-u-basket-of-goods"}, {"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/cost-of-living-tutorial/inflation-data/", "id": "DK1lCc9b7bg", "title": "Inflation data", "kind": "Video", "description": "Looking at actual sequential and year-over-year inflation data", "slug": "inflation-data"}], "in_knowledge_map": false, "description": "We might generally sense that our cost of living is going up (inflation), but how can we measure it? This tutorial shows how it is done in the United States with the consumer price index (CPI).", "node_slug": "cost-of-living-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/inflation-topic/cost-of-living-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/inflation-topic/cost-of-living-tutorial", "kind": "Topic", "slug": "cost-of-living-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/inflation-topic/real-nominal-return-tutorial/", "id": "real-nominal-return-tutorial", "hide": false, "title": "Real and nominal return", "child_data": [{"kind": "Video", "id": "167407357"}, {"kind": "Video", "id": "167407353"}, {"kind": "Video", "id": "167407352"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/real-nominal-return-tutorial/real-and-nominal-return/", "id": "cNm196bVE5A", "title": "Real and nominal return", "kind": "Video", "description": "Inflation and real and nominal return", "slug": "real-and-nominal-return"}, {"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/real-nominal-return-tutorial/calculating-real-return-in-last-year-dollars/", "id": "GiB9Mkgkrek", "title": "Calculating real return in last year dollars", "kind": "Video", "description": "Calculating real return in last year dollars", "slug": "calculating-real-return-in-last-year-dollars"}, {"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/real-nominal-return-tutorial/relation-between-nominal-and-real-returns-and-inflation/", "id": "6ycEasF48zI", "title": "Relation between nominal and real returns and inflation", "kind": "Video", "description": "Relation between nominal and real returns and inflation", "slug": "relation-between-nominal-and-real-returns-and-inflation"}], "in_knowledge_map": false, "description": "We think we're getting a certain return on our investments, but can we put it in terms of real purchasing power since the value of money is constantly changing? The answer is yes and this tutorial shows you how.", "node_slug": "real-nominal-return-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/inflation-topic/real-nominal-return-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/inflation-topic/real-nominal-return-tutorial", "kind": "Topic", "slug": "real-nominal-return-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/inflation-topic/macroecon-deflation-tutorial/", "id": "macroecon-deflation-tutorial", "hide": false, "title": "Deflation", "child_data": [{"kind": "Video", "id": "167407358"}, {"kind": "Video", "id": "167407355"}, {"kind": "Video", "id": "167407350"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/macroecon-deflation-tutorial/deflation/", "id": "FPh6EDv0Eew", "title": "Deflation", "kind": "Video", "description": "Basics of deflation", "slug": "deflation"}, {"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/macroecon-deflation-tutorial/velocity-of-money-rather-than-quantity-driving-prices/", "id": "stfSnPaaK04", "title": "Velocity of money rather than quantity driving prices", "kind": "Video", "description": "How velocity of money can drive price increases", "slug": "velocity-of-money-rather-than-quantity-driving-prices"}, {"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/macroecon-deflation-tutorial/deflation-despite-increases-in-money-supply/", "id": "t2AeULH_Ijw", "title": "Deflation despite increases in money supply", "kind": "Video", "description": "How you can have deflation even if the money supply increases", "slug": "deflation-despite-increases-in-money-supply"}], "in_knowledge_map": false, "description": "Prices don't always go up. Sometimes they go down (we call this deflation). This tutorial explains how this happens.", "node_slug": "macroecon-deflation-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/inflation-topic/macroecon-deflation-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/inflation-topic/macroecon-deflation-tutorial", "kind": "Topic", "slug": "macroecon-deflation-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/inflation-topic/deflation-inflation-scenarios-tutorial/", "id": "deflation-inflation-scenarios-tutorial", "hide": false, "title": "Inflationary and deflationary scenarios", "child_data": [{"kind": "Video", "id": "167407356"}, {"kind": "Video", "id": "167407351"}, {"kind": "Video", "id": "172846852"}, {"kind": "Video", "id": "172846853"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/deflation-inflation-scenarios-tutorial/moderate-inflation-in-a-good-economy/", "id": "Z_DcXewHHA8", "title": "Moderate inflation in a good economy", "kind": "Video", "description": "Why there tends to be moderate inflation during good economies", "slug": "moderate-inflation-in-a-good-economy"}, {"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/deflation-inflation-scenarios-tutorial/stagflation/", "id": "bTz_tx460EY", "title": "Stagflation", "kind": "Video", "description": "How a supply shock can cause prices to rise and the economy to stagnate", "slug": "stagflation"}, {"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/deflation-inflation-scenarios-tutorial/deflationary-spiral/", "id": "snX4Wf7PGts", "title": "Deflationary spiral", "kind": "Video", "description": "Basics of a deflationary spiral", "slug": "deflationary-spiral"}, {"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/deflation-inflation-scenarios-tutorial/hyperinflation/", "id": "AC_kjcuHpZw", "title": "Hyperinflation", "kind": "Video", "description": "Basic of hyperinflation. Weimar Germany, Hungarian Pengo and Zibabwean Dollar", "slug": "hyperinflation"}], "in_knowledge_map": false, "description": "This tutorial walks through various scenarios of moderate and extreme price changes. Very good way to understand how activity in the economy may impact price (and vice versa).", "node_slug": "deflation-inflation-scenarios-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/inflation-topic/deflation-inflation-scenarios-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/inflation-topic/deflation-inflation-scenarios-tutorial", "kind": "Topic", "slug": "deflation-inflation-scenarios-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/inflation-topic/phillips-curve-tutorial/", "id": "phillips-curve-tutorial", "hide": false, "title": "The Phillips curve: Inflation and unemployment", "child_data": [{"kind": "Video", "id": "421005"}, {"kind": "Video", "id": "578936836"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/phillips-curve-tutorial/unemployment-rate-primer/", "id": "9DGbDx5xQNo", "title": "Unemployment rate primer", "kind": "Video", "description": "Understanding how the headline unemployment rate (U-3) is calculated", "slug": "unemployment-rate-primer"}, {"path": "khan/economics-finance-domain/macroeconomics/inflation-topic/phillips-curve-tutorial/phillips-curve/", "id": "v7ZWTZ9NgU4", "title": "Phillips curve", "kind": "Video", "description": "The observation that inflation and unemployment tend to be inversely correlated", "slug": "phillips-curve"}], "in_knowledge_map": false, "description": "Economists have notices a correlation between unemployment and correlation (you may wan to guess what type of correlation). On some level, this tutorial is common sense, but it will give you fancy labels for this relation so that you can sound fancy at fancy parties.", "node_slug": "phillips-curve-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/inflation-topic/phillips-curve-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/inflation-topic/phillips-curve-tutorial", "kind": "Topic", "slug": "phillips-curve-tutorial"}], "in_knowledge_map": false, "description": "Inflation and deflation. CPI-U. Real and nominal return. Phillips Curve.", "node_slug": "inflation-topic", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/macroeconomics/inflation-topic", "extended_slug": "economics-finance-domain/macroeconomics/inflation-topic", "kind": "Topic", "slug": "inflation-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/", "id": "aggregate-supply-demand-topic", "hide": false, "title": "Aggregate demand and aggregate supply", "child_data": [{"kind": "Topic", "id": "x649f0644"}, {"kind": "Topic", "id": "xb07698a2"}, {"kind": "Topic", "id": "xd92fbb2a"}, {"kind": "Topic", "id": "x6dc33ce4"}, {"kind": "Topic", "id": "xe8757078"}, {"kind": "Topic", "id": "x11f08d7f"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/aggregate-supply-demand-tut/", "id": "aggregate-supply-demand-tut", "hide": false, "title": "Aggregate demand and aggregate supply", "child_data": [{"kind": "Video", "id": "679691018"}, {"kind": "Video", "id": "679779124"}, {"kind": "Video", "id": "679666700"}, {"kind": "Video", "id": "679796042"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/aggregate-supply-demand-tut/aggregate-demand/", "id": "oLhohwfwf_U", "title": "Aggregate demand", "kind": "Video", "description": "Understanding how aggregate demand is different from demand for a specific good or service. Justifications for the aggregate demand curve being downward sloping", "slug": "aggregate-demand"}, {"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/aggregate-supply-demand-tut/shifts-in-aggregate-demand/", "id": "scN-1B6plos", "title": "Shifts in aggregate demand", "kind": "Video", "description": "Factors that might shift aggregate demand", "slug": "shifts-in-aggregate-demand"}, {"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/aggregate-supply-demand-tut/long-run-aggregate-supply/", "id": "8W0iZk8Yxhs", "title": "Long-run aggregate supply", "kind": "Video", "description": "Thinking about why aggregate supply may not be influenced by prices in the long-run", "slug": "long-run-aggregate-supply"}, {"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/aggregate-supply-demand-tut/short-run-aggregate-supply/", "id": "3nbalsyibKU", "title": "Short run aggregate supply", "kind": "Video", "description": "Justifications for the aggregate supply curve to be upward sloping in the short-run", "slug": "short-run-aggregate-supply"}], "in_knowledge_map": false, "description": "This tutorial looks at supply and demand in aggregate-from the perspective of the entire economy (not just the market for one good or service). Instead of thinking of quantity of one good, we think of total output (GDP). Very useful model for thinking through macroeconomic events.", "node_slug": "aggregate-supply-demand-tut", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/aggregate-supply-demand-tut", "extended_slug": "economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/aggregate-supply-demand-tut", "kind": "Topic", "slug": "aggregate-supply-demand-tut"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/historic-ad-as-scenarios/", "id": "historic-ad-as-scenarios", "hide": false, "title": "Historical circumstances explained by AD/AS", "child_data": [{"kind": "Video", "id": "679630384"}, {"kind": "Video", "id": "679751475"}, {"kind": "Video", "id": "679785139"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/historic-ad-as-scenarios/demand-pull-inflation-under-johnson/", "id": "HdqbCvqTb20", "title": "Demand-pull inflation under Johnson", "kind": "Video", "description": "Thinking about whether inflation in the late 1960s is consistent with the AD-AS model", "slug": "demand-pull-inflation-under-johnson"}, {"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/historic-ad-as-scenarios/real-gdp-driving-price/", "id": "XsD7mqFDJs0", "title": "Real GDP driving price", "kind": "Video", "description": "Thinking about how high utilization could drive price as another justification for an upward sloping short-run aggregate supply curve", "slug": "real-gdp-driving-price"}, {"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/historic-ad-as-scenarios/cost-push-inflation/", "id": "3A-nAw2tY_4", "title": "Cost-push inflation", "kind": "Video", "description": "How an oil shock can slow the economy while causing inflation", "slug": "cost-push-inflation"}], "in_knowledge_map": false, "description": "In the last tutorial, we claimed that the aggregate demand and aggregate supply model (AD-AS) would be useful for analyzing macroeconomic events. Well, in this tutorial, we'll do exactly that.", "node_slug": "historic-ad-as-scenarios", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/historic-ad-as-scenarios", "extended_slug": "economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/historic-ad-as-scenarios", "kind": "Topic", "slug": "historic-ad-as-scenarios"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/business-cycle-tutorial/", "id": "business-cycle-tutorial", "hide": false, "title": "The business cycle", "child_data": [{"kind": "Video", "id": "679751416"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/business-cycle-tutorial/the-business-cycle/", "id": "TXrOpjG4dUs", "title": "The business cycle", "kind": "Video", "description": "The business cycle and how it may be driven by emotion", "slug": "the-business-cycle"}], "in_knowledge_map": false, "description": "Economies never have a long steady march upwards. They constantly oscillate between growth and recession. This tutorial gives a little intuition for why that is.", "node_slug": "business-cycle-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/business-cycle-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/business-cycle-tutorial", "kind": "Topic", "slug": "business-cycle-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/monetary-fiscal-policy/", "id": "monetary-fiscal-policy", "hide": false, "title": "Monetary and fiscal policy", "child_data": [{"kind": "Video", "id": "679609741"}, {"kind": "Video", "id": "679514331"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/monetary-fiscal-policy/monetary-and-fiscal-policy/", "id": "ntxMOKXHlfo", "title": "Monetary and fiscal policy", "kind": "Video", "description": "Basic mechanics of monetary and fiscal policy", "slug": "monetary-and-fiscal-policy"}, {"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/monetary-fiscal-policy/tax-lever-of-fiscal-policy/", "id": "BRXBCxKjiK8", "title": "Tax lever of fiscal policy", "kind": "Video", "description": "How government can effect aggregate demand through tax policy", "slug": "tax-lever-of-fiscal-policy"}], "in_knowledge_map": false, "description": "Governments (and pseudo government entities like central banks) have two tools at their disposal to try to impact the business cycle --monetary and fiscal policy. This will help you understand what they are.", "node_slug": "monetary-fiscal-policy", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/monetary-fiscal-policy", "extended_slug": "economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/monetary-fiscal-policy", "kind": "Topic", "slug": "monetary-fiscal-policy"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/keynesian-thinking/", "id": "keynesian-thinking", "hide": false, "title": "Keynesian thinking", "child_data": [{"kind": "Video", "id": "679637766"}, {"kind": "Video", "id": "679668417"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/keynesian-thinking/keynesian-economics/", "id": "hPkh8kOldU4", "title": "Keynesian economics", "kind": "Video", "description": "Contrasting Keynesian and Classical Thinking", "slug": "keynesian-economics"}, {"path": "khan/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/keynesian-thinking/risks-of-keynesian-thinking/", "id": "EVSkf7l7EuI", "title": "Risks of Keynesian thinking", "kind": "Video", "description": "Why Keynesian thinking might not be ideal sometimes", "slug": "risks-of-keynesian-thinking"}], "in_knowledge_map": false, "description": "Whether you love him or hate him (or just consider him a friend that you respect but disagree with every-now-and-then), Keynes has helped define how many modern governments think about their economies. This tutorial explains how his thinking was a fundamental departure from classical economics.", "node_slug": "keynesian-thinking", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/keynesian-thinking", "extended_slug": "economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/keynesian-thinking", "kind": "Topic", "slug": "keynesian-thinking"}], "in_knowledge_map": false, "description": "Aggregate demand and aggregate supply. Keynesian thinking. Demand-pull and cost-push inflation. Fiscal and monetary policy.", "node_slug": "aggregate-supply-demand-topic", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic", "extended_slug": "economics-finance-domain/macroeconomics/aggregate-supply-demand-topic", "kind": "Topic", "slug": "aggregate-supply-demand-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/", "id": "monetary-system-topic", "hide": false, "title": "The monetary system", "child_data": [{"kind": "Topic", "id": "x783f70d5"}, {"kind": "Topic", "id": "x63aa3c08"}, {"kind": "Topic", "id": "xccbd05eb"}, {"kind": "Topic", "id": "x965e5eeb"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/fractional-reserve-banking-tut/", "id": "fractional-reserve-banking-tut", "hide": false, "title": "Fractional reserve banking", "child_data": [{"kind": "Video", "id": "679742842"}, {"kind": "Video", "id": "679608861"}, {"kind": "Video", "id": "679571901"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/fractional-reserve-banking-tut/overview-of-fractional-reserve-banking/", "id": "3mUi9IZb4T4", "title": "Overview of fractional reserve banking", "kind": "Video", "description": "Big picture of how money enters circulation and how lending can increase the money supply", "slug": "overview-of-fractional-reserve-banking"}, {"path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/fractional-reserve-banking-tut/weaknesses-of-fractional-reserve-lending/", "id": "1HYSMxu-Dns", "title": "Weaknesses of fractional reserve lending", "kind": "Video", "description": "Weaknesses of Fractional Reserve Lending", "slug": "weaknesses-of-fractional-reserve-lending"}, {"path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/fractional-reserve-banking-tut/full-reserve-banking/", "id": "RGMcswR8DnY", "title": "Full reserve banking", "kind": "Video", "description": "Overview of full reserve banking in comparison to fractional reserve banking", "slug": "full-reserve-banking"}], "in_knowledge_map": false, "description": "Most modern economies use a counter-intuitive model of banking called \"fractional reserve banking.\" It is counter-intuitive (and some people would say wrong) because it allows banks to lend out money that it tells depositors is available at any time and essentially involves private banks in money creation. It also creates the possibility of mass instability through bank runs that tend to be mitigated through government regulation and insurance (some would say government subsidy of banks).\n\nThis tutorial explains how fractional reserve lending works and outlines the good and bad. It also talks about the alternative of full reserve banking.", "node_slug": "fractional-reserve-banking-tut", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/monetary-system-topic/fractional-reserve-banking-tut", "extended_slug": "economics-finance-domain/macroeconomics/monetary-system-topic/fractional-reserve-banking-tut", "kind": "Topic", "slug": "fractional-reserve-banking-tut"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/money-supply-tutorial/", "id": "money-supply-tutorial", "hide": false, "title": "Money supply", "child_data": [{"kind": "Video", "id": "679746715"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/money-supply-tutorial/money-supply-m0-m1-and-m2/", "id": "_LPh72gx6GE", "title": "Money supply: M0, M1, and M2", "kind": "Video", "description": "Different ways of measuring the money supply", "slug": "money-supply-m0-m1-and-m2"}], "in_knowledge_map": false, "description": "This short tutorial explains how we measure how much \"money\" there is out there. As we'll see, this isn't as straightforward as counting dollars in people's pockets, especially because there are multiple types of money.", "node_slug": "money-supply-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/monetary-system-topic/money-supply-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/monetary-system-topic/money-supply-tutorial", "kind": "Topic", "slug": "money-supply-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/factional-reserve-accounting/", "id": "factional-reserve-accounting", "hide": false, "title": "Fractional reserve accounting", "child_data": [{"kind": "Video", "id": "688005556"}, {"kind": "Video", "id": "688126598"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/factional-reserve-accounting/simple-fractional-reserve-accounting-part-1/", "id": "VJgVdzicv_I", "title": "Simple fractional reserve accounting (part 1)", "kind": "Video", "slug": "simple-fractional-reserve-accounting-part-1"}, {"path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/factional-reserve-accounting/simple-fractional-reserve-accounting-part-2/", "id": "PASajlCGBTw", "title": "Simple fractional reserve accounting (part 2)", "kind": "Video", "description": "How banks can actually create checking accounts under a fractional reserve system", "slug": "simple-fractional-reserve-accounting-part-2"}], "in_knowledge_map": false, "description": "If you already know a bit of what fractional reserve banking involves, this tutorial will take you deeper by looking at the actual accounting of central banks and banks.", "node_slug": "factional-reserve-accounting", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/monetary-system-topic/factional-reserve-accounting", "extended_slug": "economics-finance-domain/macroeconomics/monetary-system-topic/factional-reserve-accounting", "kind": "Topic", "slug": "factional-reserve-accounting"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/interest-price-of-money-tutorial/", "id": "interest-price-of-money-tutorial", "hide": false, "title": "Interest as the price of money", "child_data": [{"kind": "Video", "id": "614432604"}, {"kind": "Video", "id": "614455553"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/interest-price-of-money-tutorial/interest-as-rent-for-money/", "id": "Lru0vKmkzR8", "title": "Interest as rent for money", "kind": "Video", "description": "Thinking about interest as the price of money. Looking at money from a supply and demand perspective", "slug": "interest-as-rent-for-money"}, {"path": "khan/economics-finance-domain/macroeconomics/monetary-system-topic/interest-price-of-money-tutorial/money-supply-and-demand-impacting-interest-rates/", "id": "vItRHYu-A88", "title": "Money supply and demand impacting interest rates", "kind": "Video", "description": "Examples showing how various factors can affect interest rates", "slug": "money-supply-and-demand-impacting-interest-rates"}], "in_knowledge_map": false, "description": "", "node_slug": "interest-price-of-money-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/monetary-system-topic/interest-price-of-money-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/monetary-system-topic/interest-price-of-money-tutorial", "kind": "Topic", "slug": "interest-price-of-money-tutorial"}], "in_knowledge_map": false, "description": "Fractional reserve banking and the money supply.", "node_slug": "monetary-system-topic", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/macroeconomics/monetary-system-topic", "extended_slug": "economics-finance-domain/macroeconomics/monetary-system-topic", "kind": "Topic", "slug": "monetary-system-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/", "id": "income-and-expenditure-topic", "hide": false, "title": "Income and expenditure: Keynesian cross and IS-LM model", "child_data": [{"kind": "Topic", "id": "xee0ae163"}, {"kind": "Topic", "id": "x70ab0640"}, {"kind": "Topic", "id": "x7c39fbcf"}, {"kind": "Topic", "id": "xfcd5e93b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/mpc-tutorial/", "id": "MPC-tutorial", "hide": false, "title": "Marginal propensity to consume (MPC)", "child_data": [{"kind": "Video", "id": "769875615"}, {"kind": "Video", "id": "769839507"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/mpc-tutorial/mpc-and-multiplier/", "id": "O_Oozju3RRI", "title": "MPC and multiplier", "kind": "Video", "description": "Introduction to the marginal propensity to consume and the multiplier", "slug": "mpc-and-multiplier"}, {"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/mpc-tutorial/mathy-version-of-mpc-and-multiplier-optional/", "id": "czfJKPN-HEo", "title": "Mathy version of MPC and multiplier (optional)", "kind": "Video", "description": "Generalizing what we did in the last video with more math", "slug": "mathy-version-of-mpc-and-multiplier-optional"}], "in_knowledge_map": false, "description": "If you earn a $1, you might spend some fraction of it. This can then be income for someone else. This can keep going. \n\nIn this tutorial, we'll explore how the incremental spend per incremental earnings (marginal propensity to consume) and the multiplier effect based on it can drive economic activity.", "node_slug": "MPC-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/income-and-expenditure-topic/MPC-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/income-and-expenditure-topic/MPC-tutorial", "kind": "Topic", "slug": "mpc-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/consumption-function/", "id": "consumption-function", "hide": false, "title": "Consumption function", "child_data": [{"kind": "Video", "id": "769899172"}, {"kind": "Video", "id": "769859532"}, {"kind": "Video", "id": "769819567"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/consumption-function/consumption-function-basics/", "id": "o5iot_ZsoV0", "title": "Consumption function basics", "kind": "Video", "description": "The basic idea of a consumption function", "slug": "consumption-function-basics"}, {"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/consumption-function/generalized-linear-consumption-function/", "id": "N44RZtJ4jj4", "title": "Generalized linear consumption function", "kind": "Video", "description": "Generalizing a linear consumption function as a function of aggregate income", "slug": "generalized-linear-consumption-function"}, {"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/consumption-function/consumption-function-with-income-dependent-taxes/", "id": "wHPGFPIcILM", "title": "Consumption function with income dependent taxes", "kind": "Video", "description": "Thinking about a consumption function where taxes are also a function of income (which is more realistic than constant taxes)", "slug": "consumption-function-with-income-dependent-taxes"}], "in_knowledge_map": false, "description": "We are steadily building up the tools to understand the Keynesian Cross and the IS-LM model. In this tutorial, we begin to model consumption as a linear function of disposable income. Seems reasonable to me.", "node_slug": "consumption-function", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/income-and-expenditure-topic/consumption-function", "extended_slug": "economics-finance-domain/macroeconomics/income-and-expenditure-topic/consumption-function", "kind": "Topic", "slug": "consumption-function"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/keynesian-cross-tutorial/", "id": "keynesian-cross-tutorial", "hide": false, "title": "Keynesian cross", "child_data": [{"kind": "Video", "id": "769896421"}, {"kind": "Video", "id": "769845685"}, {"kind": "Video", "id": "769801637"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/keynesian-cross-tutorial/keynesian-cross/", "id": "sTw0e-hwYAQ", "title": "Keynesian cross", "kind": "Video", "description": "Analyzing planned expenditures versus actual output using the Keynesian Cross", "slug": "keynesian-cross"}, {"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/keynesian-cross-tutorial/details-on-shifting-aggregate-planned-expenditures/", "id": "xF_Z4QK0tsA", "title": "Details on shifting aggregate planned expenditures", "kind": "Video", "description": "Showing how a change in government spending can lead to a new equilibrium", "slug": "details-on-shifting-aggregate-planned-expenditures"}, {"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/keynesian-cross-tutorial/keynesian-cross-and-the-multiplier/", "id": "aSY8XPGChAU", "title": "Keynesian cross and the multiplier", "kind": "Video", "description": "More on shifting aggregate planned expenditures. Connecting to the multiplier", "slug": "keynesian-cross-and-the-multiplier"}], "in_knowledge_map": false, "description": "We now build on our consumption function models and start to explore ideas of planned expenditures as a function of output. When plotted with the actual output line, we get our Keynesian Cross which helps us think about whether the economy is operating at its potential.", "node_slug": "keynesian-cross-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/income-and-expenditure-topic/keynesian-cross-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/income-and-expenditure-topic/keynesian-cross-tutorial", "kind": "Topic", "slug": "keynesian-cross-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/is-lm-model-tutorial/", "id": "is-lm-model-tutorial", "hide": false, "title": "IS-LM model", "child_data": [{"kind": "Video", "id": "769862738"}, {"kind": "Video", "id": "769890241"}, {"kind": "Video", "id": "769891485"}, {"kind": "Video", "id": "769746025"}, {"kind": "Video", "id": "769894517"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/is-lm-model-tutorial/investment-and-real-interest-rates/", "id": "72p6uw5y-Rw", "title": "Investment and real interest rates", "kind": "Video", "description": "Intuition as to why high real interest rates lead to low investment and why low rates lead to high investment", "slug": "investment-and-real-interest-rates"}, {"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/is-lm-model-tutorial/connecting-the-keynesian-cross-to-the-is-curve/", "id": "AW3bPaErUWU", "title": "Connecting the keynesian cross to the IS curve", "kind": "Video", "description": "Introduction to the Investment/Savings curve", "slug": "connecting-the-keynesian-cross-to-the-is-curve"}, {"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/is-lm-model-tutorial/loanable-funds-interpretation-of-is-curve/", "id": "blbR5f2dq_g", "title": "Loanable funds interpretation of IS curve", "kind": "Video", "description": "Thinking about how real GDP can drive real interest rates", "slug": "loanable-funds-interpretation-of-is-curve"}, {"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/is-lm-model-tutorial/lm-part-of-the-is-lm-model/", "id": "yro2jLBfyDQ", "title": "LM part of the IS-LM model", "kind": "Video", "description": "How the theory of liquidity preference drives demand for money and the LM (liquidity preference-money supply) curve", "slug": "lm-part-of-the-is-lm-model"}, {"path": "khan/economics-finance-domain/macroeconomics/income-and-expenditure-topic/is-lm-model-tutorial/government-spending-and-the-is-lm-model/", "id": "pzQnc_0eZA8", "title": "Government spending and the IS-LM model", "kind": "Video", "description": "How a change in fiscal policy shifts the IS curve", "slug": "government-spending-and-the-is-lm-model"}], "in_knowledge_map": false, "description": "In this tutorial, we begin thinking about the impact of real interest rates on planned investment and output. We then use this to help us plot the IS curve. We then think about how, assuming a fixed money supply, as there is more economic activity, people are willing to pay more for money (helps us plot the LM curve). Finally, we use the IS-LM model to think about how fiscal policy can impact both GDP and real interest rates.\n\nYou should watch the Keynesian Cross tutorial before this one.", "node_slug": "is-lm-model-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/income-and-expenditure-topic/is-lm-model-tutorial", "extended_slug": "economics-finance-domain/macroeconomics/income-and-expenditure-topic/is-lm-model-tutorial", "kind": "Topic", "slug": "is-lm-model-tutorial"}], "in_knowledge_map": false, "description": "Consumption function. Marginal propensity to consume and multiplier. Keynesian Cross and IS-LM model.", "node_slug": "income-and-expenditure-topic", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/macroeconomics/income-and-expenditure-topic", "extended_slug": "economics-finance-domain/macroeconomics/income-and-expenditure-topic", "kind": "Topic", "slug": "income-and-expenditure-topic"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/", "id": "forex-trade-topic", "hide": false, "title": "Foreign exchange and trade", "child_data": [{"kind": "Topic", "id": "x4528f3fc"}, {"kind": "Topic", "id": "xe9378e39"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/current-capital-account/", "id": "current-capital-account", "hide": false, "title": "Balance of payments- current account and capital account", "child_data": [{"kind": "Video", "id": "769859645"}, {"kind": "Video", "id": "769953090"}, {"kind": "Video", "id": "769915388"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/current-capital-account/balance-of-payments-current-account/", "id": "dirBYVjDk7A", "title": "Balance of payments: Current account", "kind": "Video", "description": "Understanding the United States Current Account in 2011", "slug": "balance-of-payments-current-account"}, {"path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/current-capital-account/balance-of-payments-capital-account/", "id": "AimYG1jYD0A", "title": "Balance of payments: Capital account", "kind": "Video", "description": "Understanding how changes in foreign ownership of assets effects balance of payments", "slug": "balance-of-payments-capital-account"}, {"path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/current-capital-account/why-current-and-capital-accounts-net-out/", "id": "tYmMEqro8D4", "title": "Why current and capital accounts net out", "kind": "Video", "description": "Intuition behind why the current account and capital account should balance", "slug": "why-current-and-capital-accounts-net-out"}], "in_knowledge_map": false, "description": "In this tutorial we will see how trade and assets (including money) changing hands are fundamentally intertwined. Not only that, but we will see how this can be accounted for through the capital account (assets changing hands) and current account (trade).", "node_slug": "current-capital-account", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/forex-trade-topic/current-capital-account", "extended_slug": "economics-finance-domain/macroeconomics/forex-trade-topic/current-capital-account", "kind": "Topic", "slug": "current-capital-account"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/", "id": "currency-reserves", "hide": false, "title": "Currency reserves", "child_data": [{"kind": "Video", "id": "796511718"}, {"kind": "Video", "id": "796550439"}, {"kind": "Video", "id": "796575432"}, {"kind": "Video", "id": "796388970"}, {"kind": "Video", "id": "796509722"}], "children": [{"path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/accumulating-foreign-currency-reserves/", "id": "HiphWQfB6J0", "title": "Accumulating foreign currency reserves", "kind": "Video", "description": "How and why a central bank would build foreign currency reserves", "slug": "accumulating-foreign-currency-reserves"}, {"path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/using-reserves-to-stablize-currency/", "id": "TZ7d5kjAlQw", "title": "Using reserves to stabilize currency", "kind": "Video", "description": "How a central bank could use foreign currency reserves to keep its own currency from devaluing", "slug": "using-reserves-to-stablize-currency"}, {"path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/speculative-attack-on-a-currency/", "id": "P2IWGlR1SHs", "title": "Speculative attack on a currency", "kind": "Video", "slug": "speculative-attack-on-a-currency"}, {"path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/financial-crisis-in-thailand-caused-by-speculative-attack/", "id": "lA3sjWwu5-s", "title": "Financial crisis in Thailand caused by speculative attack", "kind": "Video", "description": "How a currency crisis in Thailand led to a banking crisis in the 1990s", "slug": "financial-crisis-in-thailand-caused-by-speculative-attack"}, {"path": "khan/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves/math-mechanics-of-thai-banking-crisis/", "id": "9p3HNMe-oAI", "title": "Math mechanics of Thai banking crisis", "kind": "Video", "description": "Going through the mechanics of how a Thai financial institution can lose their shirt when their currency devalues.", "slug": "math-mechanics-of-thai-banking-crisis"}], "in_knowledge_map": false, "description": "This tutorial delves into how and why countries (usually their central banks) would want to keep other countries' currency in reserve. It then goes into why this sometime leaves the reserve-holding country open to a speculative attack (this is seriously high drama).", "node_slug": "currency-reserves", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves", "extended_slug": "economics-finance-domain/macroeconomics/forex-trade-topic/currency-reserves", "kind": "Topic", "slug": "currency-reserves"}], "in_knowledge_map": false, "description": "Balance of payments. Current account. Capital account. Currency reserves and speculative attacks.", "node_slug": "forex-trade-topic", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/macroeconomics/forex-trade-topic", "extended_slug": "economics-finance-domain/macroeconomics/forex-trade-topic", "kind": "Topic", "slug": "forex-trade-topic"}], "in_knowledge_map": false, "description": "Topics covered in a traditional college level introductory macroeconomics course", "node_slug": "macroeconomics", "render_type": "Subject", "topic_page_url": "/economics-finance-domain/macroeconomics", "extended_slug": "economics-finance-domain/macroeconomics", "kind": "Topic", "slug": "macroeconomics"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/economics-finance-domain/core-finance/", "id": "core-finance", "hide": false, "title": "Finance and capital markets", "child_data": [{"kind": "Topic", "id": "xb9498306"}, {"kind": "Topic", "id": "x1f4c64fb"}, {"kind": "Topic", "id": "xc29ba30c"}, {"kind": "Topic", "id": "x3fcefa26"}, {"kind": "Topic", "id": "xc788cc9a"}, {"kind": "Topic", "id": "xf81b84d6"}, {"kind": "Topic", "id": "x7568a183"}, {"kind": "Topic", "id": "xc1e8c32f"}, {"kind": "Topic", "id": "xcbcda7d7"}, {"kind": "Topic", "id": "x8c96df53"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/core-finance/interest-tutorial/", "id": "interest-tutorial", "hide": false, "title": "Interest and debt", "child_data": [{"kind": "Topic", "id": "x5d65de66"}, {"kind": "Topic", "id": "x5c26dce6"}, {"kind": "Topic", "id": "xd694d20d"}, {"kind": "Topic", "id": "x942af81b"}, {"kind": "Topic", "id": "xa1e123c1"}, {"kind": "Topic", "id": "x4fc0528c"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/interest-tutorial/compound-interest-tutorial/", "id": "compound-interest-tutorial", "hide": false, "title": "Compound interest basics", "child_data": [{"kind": "Video", "id": "1587287"}, {"kind": "Video", "id": "1591277"}], "children": [{"path": "khan/economics-finance-domain/core-finance/interest-tutorial/compound-interest-tutorial/introduction-to-compound-interest/", "id": "Rm6UdfRs3gw", "title": "Introduction to compound interest", "kind": "Video", "description": "Introduction to compound interest", "slug": "introduction-to-compound-interest"}, {"path": "khan/economics-finance-domain/core-finance/interest-tutorial/compound-interest-tutorial/the-rule-of-72-for-compound-interest/", "id": "mec-QpjQMXY", "title": "The rule of 72 for compound interest", "kind": "Video", "description": "Using the Rule of 72 to approximate how long it will take for an investment to double at a given interest rate", "slug": "the-rule-of-72-for-compound-interest"}], "in_knowledge_map": false, "description": "Interest is the basis of modern capital markets. Depending on whether you are lending or borrowing, it can be viewed as a return on an asset (lending) or the cost of capital (borrowing).\n\nThis tutorial gives an introduction to this fundamental concept, including what it means to compound. It also gives a rule of thumb that might make it easy to do some rough interest calculations in your head.", "node_slug": "compound-interest-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/interest-tutorial/compound-interest-tutorial", "extended_slug": "economics-finance-domain/core-finance/interest-tutorial/compound-interest-tutorial", "kind": "Topic", "slug": "compound-interest-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/interest-tutorial/interest-basics-tutorial/", "id": "interest-basics-tutorial", "hide": false, "title": "Interest basics", "child_data": [{"kind": "Video", "id": "24798"}, {"kind": "Video", "id": "24800"}], "children": [{"path": "khan/economics-finance-domain/core-finance/interest-tutorial/interest-basics-tutorial/introduction-to-interest/", "id": "GtaoP0skPWc", "title": "Introduction to interest", "kind": "Video", "description": "What interest is. Simple versus compound interest.", "slug": "introduction-to-interest"}, {"path": "khan/economics-finance-domain/core-finance/interest-tutorial/interest-basics-tutorial/interest-part-2/", "id": "t4zfiBw0hwM", "title": "Interest (part 2)", "kind": "Video", "description": "More on simple and compound interest", "slug": "interest-part-2"}], "in_knowledge_map": false, "description": "This is a good introduction to the basic concept of interest. We will warn you that it is an older video so Sal's sound and handwriting weren't quite up to snuff then.", "node_slug": "interest-basics-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/interest-tutorial/interest-basics-tutorial", "extended_slug": "economics-finance-domain/core-finance/interest-tutorial/interest-basics-tutorial", "kind": "Topic", "slug": "interest-basics-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/interest-tutorial/credit-card-interest/", "id": "credit-card-interest", "hide": false, "title": "Credit cards and loans", "child_data": [{"kind": "Video", "id": "1578306"}, {"kind": "Video", "id": "24923"}, {"kind": "Video", "id": "1663225"}], "children": [{"path": "khan/economics-finance-domain/core-finance/interest-tutorial/credit-card-interest/annual-percentage-rate-apr-and-effective-apr/", "id": "RuPMsK0mQC8", "title": "Annual percentage rate (APR) and effective APR", "kind": "Video", "description": "The difference between APR and effective APR", "slug": "annual-percentage-rate-apr-and-effective-apr"}, {"path": "khan/economics-finance-domain/core-finance/interest-tutorial/credit-card-interest/institutional-roles-in-issuing-and-processing-credit-cards/", "id": "IPxQQNyCxas", "title": "Institutional roles in issuing and processing credit cards", "kind": "Video", "description": "The institutions involved in processing your credit credit and how they relate to each other", "slug": "institutional-roles-in-issuing-and-processing-credit-cards"}, {"path": "khan/economics-finance-domain/core-finance/interest-tutorial/credit-card-interest/payday-loans/", "id": "BHTMuHvmarU", "title": "Payday loans", "kind": "Video", "description": "How Payday lending works", "slug": "payday-loans"}], "in_knowledge_map": false, "description": "Most of us have borrowed to buy something. Credit cards, in particular, can be quite convenient (but dangerous if not used in moderation).\n\nThis tutorial explains credit card interest, how credit card companies make money and a far more silly way of borrowing money called \"payday\" loans.", "node_slug": "credit-card-interest", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/interest-tutorial/credit-card-interest", "extended_slug": "economics-finance-domain/core-finance/interest-tutorial/credit-card-interest", "kind": "Topic", "slug": "credit-card-interest"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/interest-tutorial/cont-comp-int-and-e/", "id": "cont-comp-int-and-e", "hide": false, "title": "Continuous compound interest and e", "child_data": [{"kind": "Video", "id": "xadd2e89f"}, {"kind": "Video", "id": "x3de9db0c"}, {"kind": "Video", "id": "x4169ef62"}], "children": [{"path": "khan/economics-finance-domain/core-finance/interest-tutorial/cont-comp-int-and-e/e-through-compound-interest/", "id": "BKGx8GMVu88", "title": "e and compound interest", "kind": "Video", "slug": "e-through-compound-interest"}, {"path": "khan/economics-finance-domain/core-finance/interest-tutorial/cont-comp-int-and-e/e-as-limit/", "id": "oQhp3ndj28Y", "title": "e as a limit", "kind": "Video", "slug": "e-as-limit"}, {"path": "khan/economics-finance-domain/core-finance/interest-tutorial/cont-comp-int-and-e/continuously-compounding-interest-formula-e/", "id": "o5QRdHH8aeQ", "title": "Formula for continuously compounding interest", "kind": "Video", "slug": "continuously-compounding-interest-formula-e"}], "in_knowledge_map": false, "description": "This is an older tutorial (notice the low-res, bad handwriting) about one of the coolest numbers in reality and how it falls out of our innate desire to compound interest continuously.", "node_slug": "cont-comp-int-and-e", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/interest-tutorial/cont-comp-int-and-e", "extended_slug": "economics-finance-domain/core-finance/interest-tutorial/cont-comp-int-and-e", "kind": "Topic", "slug": "cont-comp-int-and-e"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/interest-tutorial/present-value/", "id": "present-value", "hide": false, "title": "Present value", "child_data": [{"kind": "Video", "id": "195783499"}, {"kind": "Video", "id": "24802"}, {"kind": "Video", "id": "24804"}, {"kind": "Video", "id": "24806"}, {"kind": "Video", "id": "24808"}], "children": [{"path": "khan/economics-finance-domain/core-finance/interest-tutorial/present-value/introduction-to-present-value/", "id": "ks33lMoxst0", "title": "Introduction to present value", "kind": "Video", "description": "A choice between money now and money later.", "slug": "introduction-to-present-value"}, {"path": "khan/economics-finance-domain/core-finance/interest-tutorial/present-value/present-value-2/", "id": "4LSktB7Pk_c", "title": "Present value 2", "kind": "Video", "description": "More choices as to when you get your money.", "slug": "present-value-2"}, {"path": "khan/economics-finance-domain/core-finance/interest-tutorial/present-value/present-value-3/", "id": "3SgVUlEcOBU", "title": "Present value 3", "kind": "Video", "description": "What happens when we change the discount rate?", "slug": "present-value-3"}, {"path": "khan/economics-finance-domain/core-finance/interest-tutorial/present-value/present-value-4-and-discounted-cash-flow/", "id": "6WCfVjUTTEY", "title": "Present value 4 (and discounted cash flow)", "kind": "Video", "description": "Lets change the discount rates depending on how far out the payments are.", "slug": "present-value-4-and-discounted-cash-flow"}], "in_knowledge_map": false, "description": "If you gladly pay for a hamburger on Tuesday for a hamburger today, is it equivalent to paying for it today?\n\nA reasonable argument can be made that most everything in finance really boils down to \"present value\". So pay attention to this tutorial.", "node_slug": "present-value", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/interest-tutorial/present-value", "extended_slug": "economics-finance-domain/core-finance/interest-tutorial/present-value", "kind": "Topic", "slug": "present-value"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/interest-tutorial/personal-bankruptcy-tut/", "id": "personal-bankruptcy-tut", "hide": false, "title": "Personal bankruptcy", "child_data": [{"kind": "Video", "id": "24899"}], "children": [{"path": "khan/economics-finance-domain/core-finance/interest-tutorial/personal-bankruptcy-tut/personal-bankruptcy-chapters-7-and-13/", "id": "H3tg4bH5JuY", "title": "Personal bankruptcy: Chapters 7 and 13", "kind": "Video", "description": "Chapter 7 and Chapter 13 personal bankruptcy.", "slug": "personal-bankruptcy-chapters-7-and-13"}], "in_knowledge_map": false, "description": "Back in the day (like medieval Europe), you would actually be thrown in jail if you couldn't pay your debts (debtor's prison). That seemed like a pretty awful thing to do (not to mention that lenders are much less likely to be paid by someone rotting in prison), so governments created an \"out\" called bankruptcy (which, as you'll see, is a pseudo-painful \"reset\" button on your finances).", "node_slug": "personal-bankruptcy-tut", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/interest-tutorial/personal-bankruptcy-tut", "extended_slug": "economics-finance-domain/core-finance/interest-tutorial/personal-bankruptcy-tut", "kind": "Topic", "slug": "personal-bankruptcy-tut"}], "in_knowledge_map": false, "description": "", "node_slug": "interest-tutorial", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/core-finance/interest-tutorial", "extended_slug": "economics-finance-domain/core-finance/interest-tutorial", "kind": "Topic", "slug": "interest-tutorial"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/core-finance/housing/", "id": "housing", "hide": false, "title": "Housing", "child_data": [{"kind": "Topic", "id": "x1fc333b8"}, {"kind": "Topic", "id": "x18c0f207"}, {"kind": "Topic", "id": "x1562aa84"}, {"kind": "Topic", "id": "xfb7a4e97"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/housing/home-equity-tutorial/", "id": "home-equity-tutorial", "hide": false, "title": "Home equity and personal balance sheets", "child_data": [{"kind": "Video", "id": "24810"}, {"kind": "Video", "id": "24812"}, {"kind": "Video", "id": "24814"}], "children": [{"path": "khan/economics-finance-domain/core-finance/housing/home-equity-tutorial/introduction-to-balance-sheets/", "id": "mxsYHiDVNlk", "title": "Introduction to balance sheets", "kind": "Video", "description": "Using a home purchase to illustrate assets, liabilities and owner's equity.", "slug": "introduction-to-balance-sheets"}, {"path": "khan/economics-finance-domain/core-finance/housing/home-equity-tutorial/more-on-balance-sheets-and-equity/", "id": "U2Nw5T44zvY", "title": "More on balance sheets and equity", "kind": "Video", "description": "What happens to equity when the value of the assets increase or decrease?", "slug": "more-on-balance-sheets-and-equity"}, {"path": "khan/economics-finance-domain/core-finance/housing/home-equity-tutorial/home-equity-loans/", "id": "7rrSuhFC7I0", "title": "Home equity loans", "kind": "Video", "description": "Simple example of borrowing from equity to fuel consumption", "slug": "home-equity-loans"}], "in_knowledge_map": false, "description": "This old and badly drawn tutorial covers a topic essential to anyone planning to not live in the woods -- your personal balance sheet. Since homes are usually the biggest part of these personal balance sheets, we cover that too.", "node_slug": "home-equity-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/housing/home-equity-tutorial", "extended_slug": "economics-finance-domain/core-finance/housing/home-equity-tutorial", "kind": "Topic", "slug": "home-equity-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/housing/renting-v-buying/", "id": "renting-v-buying", "hide": false, "title": "Renting vs. buying a home", "child_data": [{"kind": "Video", "id": "xbf427a83"}, {"kind": "Video", "id": "24816"}, {"kind": "Video", "id": "24818"}, {"kind": "Video", "id": "24820"}], "children": [{"path": "khan/economics-finance-domain/core-finance/housing/renting-v-buying/renting-versus-buying-a-home/", "id": "JNL6f1xkie4", "title": "Renting versus buying a home", "kind": "Video", "slug": "renting-versus-buying-a-home"}, {"path": "khan/economics-finance-domain/core-finance/housing/renting-v-buying/renting-vs-buying-a-home/", "id": "YL10H_EcB-E", "title": "Renting vs. buying a home", "kind": "Video", "description": "The math of renting vs. buying a home. Challenging the notion that it is always better to buy.", "slug": "renting-vs-buying-a-home"}, {"path": "khan/economics-finance-domain/core-finance/housing/renting-v-buying/renting-vs-buying-a-home-part-2/", "id": "QA2TBiIsdT0", "title": "Renting vs. buying a home (part 2)", "kind": "Video", "description": "Factoring in appreciation and depreciation into the rent vs. buy decision.", "slug": "renting-vs-buying-a-home-part-2"}, {"path": "khan/economics-finance-domain/core-finance/housing/renting-v-buying/renting-vs-buying-detailed-analysis/", "id": "mtL_plJXv3c", "title": "Renting vs. buying (detailed analysis)", "kind": "Video", "description": "Detailed analysis of the rent vs. buy decision.", "slug": "renting-vs-buying-detailed-analysis"}], "in_knowledge_map": false, "description": "Is it always better to buy than rent? What if home prices go up dramatically and rents don't? How can we compare home prices to rents to figure out what to do.\n\nThis older tutorial (low-res, bad handwriting) walks us through this. It is about housing but similar thinking can be applied to any rent-vs-buy decision (spoiler alert, Sal did eventually buy a home).", "node_slug": "renting-v-buying", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/housing/renting-v-buying", "extended_slug": "economics-finance-domain/core-finance/housing/renting-v-buying", "kind": "Topic", "slug": "renting-v-buying"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/", "id": "mortgages-tutorial", "hide": false, "title": "Mortgages", "child_data": [{"kind": "Video", "id": "1674026"}, {"kind": "Video", "id": "195783501"}, {"kind": "Video", "id": "xfe311e0f"}, {"kind": "Video", "id": "x2fc357e3"}, {"kind": "Video", "id": "xef8f60c8"}, {"kind": "Video", "id": "x67720a03"}, {"kind": "Video", "id": "23574"}], "children": [{"path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/introduction-to-mortgage-loans/", "id": "y-1Gh4ewklY", "title": "Introduction to mortgage loans", "kind": "Video", "description": "Introduction to mortgage loans", "slug": "introduction-to-mortgage-loans"}, {"path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/short-sale-basics/", "id": "5YfO4CshL7Y", "title": "Short sale basics", "kind": "Video", "slug": "short-sale-basics"}, {"path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/adjustable-rate-mortgages-arms/", "id": "S-mTwg73jCY", "title": "Adjustable rate mortgages ARMs", "kind": "Video", "slug": "adjustable-rate-mortgages-arms"}, {"path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/hybrid-arm/", "id": "wluZFFkJ2io", "title": "Hybrid ARM", "kind": "Video", "slug": "hybrid-arm"}, {"path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/balloon-payment-mortgage/", "id": "Qt-CWv6HEII", "title": "Balloon payment mortgage", "kind": "Video", "slug": "balloon-payment-mortgage"}, {"path": "khan/economics-finance-domain/core-finance/housing/mortgages-tutorial/geometric-series-sum-to-figure-out-mortgage-payments/", "id": "i05-okb1EJg", "title": "Geometric series sum to figure out mortgage payments", "kind": "Video", "description": "Figuring out the formula for fixed mortgage payments using the sum of a geometric series", "slug": "geometric-series-sum-to-figure-out-mortgage-payments"}], "in_knowledge_map": false, "description": "Most people buying a home need a mortgage to do so. This tutorial explains what a mortgage is and then actually does some math to figure out what your payments are (the last video is quite mathy so consider it optional).", "node_slug": "mortgages-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/housing/mortgages-tutorial", "extended_slug": "economics-finance-domain/core-finance/housing/mortgages-tutorial", "kind": "Topic", "slug": "mortgages-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/", "id": "home-buying-process", "hide": false, "title": "Home buying process", "child_data": [{"kind": "Video", "id": "x16084b5c"}, {"kind": "Video", "id": "x599b77cb"}, {"kind": "Video", "id": "x4a893396"}, {"kind": "Video", "id": "x55353ec2"}, {"kind": "Video", "id": "xd264ac61"}], "children": [{"path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/titles-and-deeds-in-real-estate/", "id": "ZGIPntpFCOc", "title": "Titles and deeds in real estate", "kind": "Video", "slug": "titles-and-deeds-in-real-estate"}, {"path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/title-insurance/", "id": "ji4ilvfmTEw", "title": "Title insurance", "kind": "Video", "slug": "title-insurance"}, {"path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/making-an-offer-on-a-home/", "id": "JVcbDb3e-6w", "title": "Making an offer on a home", "kind": "Video", "slug": "making-an-offer-on-a-home"}, {"path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/escrow/", "id": "FDJ4D78pcbg", "title": "Escrow", "kind": "Video", "slug": "escrow"}, {"path": "khan/economics-finance-domain/core-finance/housing/home-buying-process/types-of-escrow-in-real-estate/", "id": "haS083Zbib4", "title": "Types of escrow in real estate", "kind": "Video", "slug": "types-of-escrow-in-real-estate"}], "in_knowledge_map": false, "description": "Buying a home involves a lot more than writing a check and getting keys. It could very well be the largest transaction that either the buyer or seller does in their life. Because that, it is an involved process that can sometimes be confusing. Whether we're talking title insurance, escrow, or contingencies, the goal of this tutorial is to demystify the process.", "node_slug": "home-buying-process", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/housing/home-buying-process", "extended_slug": "economics-finance-domain/core-finance/housing/home-buying-process", "kind": "Topic", "slug": "home-buying-process"}], "in_knowledge_map": false, "description": "", "node_slug": "housing", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/core-finance/housing", "extended_slug": "economics-finance-domain/core-finance/housing", "kind": "Topic", "slug": "housing"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/", "id": "inflation-tutorial", "hide": false, "title": "Inflation", "child_data": [{"kind": "Topic", "id": "xfa1a252a"}, {"kind": "Topic", "id": "xcebd70b9"}, {"kind": "Topic", "id": "x62c80274"}, {"kind": "Topic", "id": "xc9551e11"}, {"kind": "Topic", "id": "x64ee47f7"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-basics-tutorial/", "id": "inflation-basics-tutorial", "hide": false, "title": "Inflation basics", "child_data": [{"kind": "Video", "id": "195783500"}, {"kind": "Video", "id": "167407354"}, {"kind": "Video", "id": "167407349"}, {"kind": "Video", "id": "364059"}], "children": [{"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-basics-tutorial/what-is-inflation/", "id": "yahEP620480", "title": "What is inflation", "kind": "Video", "description": "The basics of what price inflation is and how the CPI-U is calculated", "slug": "what-is-inflation"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-basics-tutorial/inflation-data/", "id": "DK1lCc9b7bg", "title": "Inflation data", "kind": "Video", "description": "Looking at actual sequential and year-over-year inflation data", "slug": "inflation-data"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-basics-tutorial/cpi-index/", "id": "pRIELoITIHI", "title": "CPI index", "kind": "Video", "description": "Discussion of inflation, the CPI index and owners' equivalent rent.", "slug": "cpi-index"}], "in_knowledge_map": false, "description": "$1 went a lot further in 1900 than today (you could probably buy a good meal for the family for $1 back then). Why? And how do we measure how much more expensive things have gotten (i.e., inflation)?", "node_slug": "inflation-basics-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/inflation-tutorial/inflation-basics-tutorial", "extended_slug": "economics-finance-domain/core-finance/inflation-tutorial/inflation-basics-tutorial", "kind": "Topic", "slug": "inflation-basics-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-scenarios-tutorial/", "id": "inflation-scenarios-tutorial", "hide": false, "title": "Inflation scenarios", "child_data": [{"kind": "Video", "id": "167407356"}, {"kind": "Video", "id": "167407351"}, {"kind": "Video", "id": "172846853"}], "children": [{"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-scenarios-tutorial/moderate-inflation-in-a-good-economy/", "id": "Z_DcXewHHA8", "title": "Moderate inflation in a good economy", "kind": "Video", "description": "Why there tends to be moderate inflation during good economies", "slug": "moderate-inflation-in-a-good-economy"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-scenarios-tutorial/stagflation/", "id": "bTz_tx460EY", "title": "Stagflation", "kind": "Video", "description": "How a supply shock can cause prices to rise and the economy to stagnate", "slug": "stagflation"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/inflation-scenarios-tutorial/hyperinflation/", "id": "AC_kjcuHpZw", "title": "Hyperinflation", "kind": "Video", "description": "Basic of hyperinflation. Weimar Germany, Hungarian Pengo and Zibabwean Dollar", "slug": "hyperinflation"}], "in_knowledge_map": false, "description": "You know about inflation, but now want to look at how thing might play out in different scenarios. This tutorial focuses on when inflation is \"acceptable\" and when it isn't (and the causes and repercussions).", "node_slug": "inflation-scenarios-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/inflation-tutorial/inflation-scenarios-tutorial", "extended_slug": "economics-finance-domain/core-finance/inflation-tutorial/inflation-scenarios-tutorial", "kind": "Topic", "slug": "inflation-scenarios-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/real-nominal-return-tut/", "id": "real-nominal-return-tut", "hide": false, "title": "Real and nominal return", "child_data": [{"kind": "Video", "id": "167407357"}, {"kind": "Video", "id": "167407353"}, {"kind": "Video", "id": "167407352"}], "children": [{"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/real-nominal-return-tut/real-and-nominal-return/", "id": "cNm196bVE5A", "title": "Real and nominal return", "kind": "Video", "description": "Inflation and real and nominal return", "slug": "real-and-nominal-return"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/real-nominal-return-tut/calculating-real-return-in-last-year-dollars/", "id": "GiB9Mkgkrek", "title": "Calculating real return in last year dollars", "kind": "Video", "description": "Calculating real return in last year dollars", "slug": "calculating-real-return-in-last-year-dollars"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/real-nominal-return-tut/relation-between-nominal-and-real-returns-and-inflation/", "id": "6ycEasF48zI", "title": "Relation between nominal and real returns and inflation", "kind": "Video", "description": "Relation between nominal and real returns and inflation", "slug": "relation-between-nominal-and-real-returns-and-inflation"}], "in_knowledge_map": false, "description": "If the value of money is constantly changing, can we compare investment return in the future or past to that earned in the present? This tutorial focuses on how to do this (another good tutorial to watch is the one on \"present value\").", "node_slug": "real-nominal-return-tut", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/inflation-tutorial/real-nominal-return-tut", "extended_slug": "economics-finance-domain/core-finance/inflation-tutorial/real-nominal-return-tut", "kind": "Topic", "slug": "real-nominal-return-tut"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/", "id": "cap-util-inflation", "hide": false, "title": "Capacity utilization and inflation", "child_data": [{"kind": "Video", "id": "410033"}, {"kind": "Video", "id": "397053"}, {"kind": "Video", "id": "431001"}, {"kind": "Video", "id": "359054"}, {"kind": "Video", "id": "397054"}, {"kind": "Video", "id": "406025"}], "children": [{"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/economics-of-a-cupcake-factory/", "id": "XDIBJyNnLOU", "title": "Economics of a cupcake factory", "kind": "Video", "description": "Economics of a simple business leading up to a discussion on inflation/deflation. Touching on income statements.", "slug": "economics-of-a-cupcake-factory"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/cupcake-economics-2/", "id": "-LTXzYXaAuk", "title": "Cupcake economics 2", "kind": "Video", "description": "More analysis of the cupcake business.", "slug": "cupcake-economics-2"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/cupcake-economics-3/", "id": "8x1-TeDxblU", "title": "Cupcake economics 3", "kind": "Video", "description": "Using our spreadsheet to show why prices decrease when utilization is low and prices increase when utilization is high.", "slug": "cupcake-economics-3"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/inflation-deflation-capacity-utilization/", "id": "LXrPdFn7Gn4", "title": "Inflation, deflation, and capacity utilization", "kind": "Video", "description": "A discussion of inflation and deflation", "slug": "inflation-deflation-capacity-utilization"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/inflation-deflation-capacity-utilization-2/", "id": "cugQ4z4cJF8", "title": "Inflation, deflation, and capacity utilization 2", "kind": "Video", "description": "More on inflation and capacity utilization", "slug": "inflation-deflation-capacity-utilization-2"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation/inflation-deflation-3-obama-stimulus-plan/", "id": "sZRkERfzzn4", "title": "Inflation and deflation 3: Obama stimulus plan", "kind": "Video", "description": "Is the stimulus large enough to offset the demand shock caused by the contraction in credit? Will it lead to inflation?", "slug": "inflation-deflation-3-obama-stimulus-plan"}], "in_knowledge_map": false, "description": "This tutorial starts with a very \"micro\" view of when firms decide to raise (or lower prices). It then jumps back to the macro view to discuss how capacity utilization can impact prices.", "node_slug": "cap-util-inflation", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation", "extended_slug": "economics-finance-domain/core-finance/inflation-tutorial/cap-util-inflation", "kind": "Topic", "slug": "cap-util-inflation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/inflation-tutorial/deflation-tutorial/", "id": "deflation-tutorial", "hide": false, "title": "Deflation", "child_data": [{"kind": "Video", "id": "167407358"}, {"kind": "Video", "id": "167407355"}, {"kind": "Video", "id": "167407350"}, {"kind": "Video", "id": "172846852"}], "children": [{"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/deflation-tutorial/deflation/", "id": "FPh6EDv0Eew", "title": "Deflation", "kind": "Video", "description": "Basics of deflation", "slug": "deflation"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/deflation-tutorial/velocity-of-money-rather-than-quantity-driving-prices/", "id": "stfSnPaaK04", "title": "Velocity of money rather than quantity driving prices", "kind": "Video", "description": "How velocity of money can drive price increases", "slug": "velocity-of-money-rather-than-quantity-driving-prices"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/deflation-tutorial/deflation-despite-increases-in-money-supply/", "id": "t2AeULH_Ijw", "title": "Deflation despite increases in money supply", "kind": "Video", "description": "How you can have deflation even if the money supply increases", "slug": "deflation-despite-increases-in-money-supply"}, {"path": "khan/economics-finance-domain/core-finance/inflation-tutorial/deflation-tutorial/deflationary-spiral/", "id": "snX4Wf7PGts", "title": "Deflationary spiral", "kind": "Video", "description": "Basics of a deflationary spiral", "slug": "deflationary-spiral"}], "in_knowledge_map": false, "description": "Prices don't always go up. They often go down. This might seem like a good thing, but it could be disastrous for a modern economy is it goes too far. This tutorial explains what deflation is, how it happens and what the effects of it might be.", "node_slug": "deflation-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/inflation-tutorial/deflation-tutorial", "extended_slug": "economics-finance-domain/core-finance/inflation-tutorial/deflation-tutorial", "kind": "Topic", "slug": "deflation-tutorial"}], "in_knowledge_map": false, "description": "", "node_slug": "inflation-tutorial", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/core-finance/inflation-tutorial", "extended_slug": "economics-finance-domain/core-finance/inflation-tutorial", "kind": "Topic", "slug": "inflation-tutorial"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/core-finance/taxes-topic/", "id": "taxes-topic", "hide": false, "title": "Taxes", "child_data": [{"kind": "Topic", "id": "x4ef9e935"}, {"kind": "Topic", "id": "x73a45a6f"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/", "id": "taxes", "hide": false, "title": "Personal taxes", "child_data": [{"kind": "Video", "id": "195783498"}, {"kind": "Video", "id": "60049935"}, {"kind": "Video", "id": "95907354"}, {"kind": "Video", "id": "60049936"}, {"kind": "Video", "id": "109588140"}, {"kind": "Video", "id": "1340481131"}, {"kind": "Video", "id": "xa4dc2c7e"}, {"kind": "Video", "id": "x54474fe6"}, {"kind": "Video", "id": "x169b2cd0"}, {"kind": "Video", "id": "x32174f36"}], "children": [{"path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/basics-of-us-income-tax-rate-schedule/", "id": "OGVJfcSckUs", "title": "Basics of US income tax rate schedule", "kind": "Video", "description": "Understanding that a marginal tax rate does not apply to all of income", "slug": "basics-of-us-income-tax-rate-schedule"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/tax-deductions-introduction/", "id": "GypHy3gnG5E", "title": "Tax deductions introduction", "kind": "Video", "description": "Understanding what a tax deduction is", "slug": "tax-deductions-introduction"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/amt-overview/", "id": "T0CwhLHrE2k", "title": "AMT overview", "kind": "Video", "description": "Overview of what the Alternative Minimum Tax is and its purpose", "slug": "amt-overview"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/alternative-minimum-tax/", "id": "yrlLKwmb5dY", "title": "Alternative minimum tax", "kind": "Video", "description": "The basics of the alternative minimum tax", "slug": "alternative-minimum-tax"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/estate-tax-introduction/", "id": "eElHlE4j-vw", "title": "Estate tax introduction", "kind": "Video", "description": "Overview of the estate tax", "slug": "estate-tax-introduction"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/tax-brackets-and-progressive-taxation/", "id": "AhgR3X--bbY", "title": "Tax brackets and progressive taxation", "kind": "Video", "slug": "tax-brackets-and-progressive-taxation"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/calculating-federal-taxes-and-take-home-pay/", "id": "DtCfOMl3qo0", "title": "Calculating federal taxes and take home pay", "kind": "Video", "slug": "calculating-federal-taxes-and-take-home-pay"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/calculating-state-taxes-and-take-home-pay/", "id": "iIBQm3me8cs", "title": "Calculating state taxes and take home pay", "kind": "Video", "slug": "calculating-state-taxes-and-take-home-pay"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/marriage-penalty/", "id": "SX_DzTb95mM", "title": "Marriage penalty", "kind": "Video", "slug": "marriage-penalty"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/taxes/married-taxes-clarification/", "id": "MR9CrsF3D00", "title": "Married taxes clarification", "kind": "Video", "slug": "married-taxes-clarification"}], "in_knowledge_map": false, "description": "Benjamin Franklin (and several other writers/philosophers) tells us that \"In this world nothing can be said to be certain, except death and taxes.\" He's right. \n\nThis tutorial focus on personal income tax. Very important to watch if you ever plan on earning money (some of which the government will take for itself).", "node_slug": "taxes", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/taxes-topic/taxes", "extended_slug": "economics-finance-domain/core-finance/taxes-topic/taxes", "kind": "Topic", "slug": "taxes"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/taxes-topic/corporate-taxation/", "id": "corporate-taxation", "hide": false, "title": "Corporate taxation", "child_data": [{"kind": "Video", "id": "65171991"}, {"kind": "Video", "id": "65171992"}, {"kind": "Video", "id": "1090948774"}], "children": [{"path": "khan/economics-finance-domain/core-finance/taxes-topic/corporate-taxation/corporations-and-limited-liability/", "id": "VnTlKcIigyY", "title": "Corporations and limited liability", "kind": "Video", "description": "Why people set up corporations", "slug": "corporations-and-limited-liability"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/corporate-taxation/is-limited-liability-or-double-taxation-fair/", "id": "IiKKAw38ss0", "title": "Is limited liability or double taxation fair?", "kind": "Video", "description": "Thinking about whether limited liability or double taxation is fair", "slug": "is-limited-liability-or-double-taxation-fair"}, {"path": "khan/economics-finance-domain/core-finance/taxes-topic/corporate-taxation/transfer-pricing-and-tax-havens/", "id": "TLSYwkWCIzA", "title": "Transfer pricing and tax havens", "kind": "Video", "description": "How a corporation can set up a tax haven and use it through transfer pricing.", "slug": "transfer-pricing-and-tax-havens"}], "in_knowledge_map": false, "description": "In exchange for being treated as a person-like-legal entity (and the limited liability this gives for its owners), most corporations pay taxes. This tutorial focuses on what corporations are, \"double taxation\" and a few ways that multinationals might try to get out of paying taxes.", "node_slug": "corporate-taxation", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/taxes-topic/corporate-taxation", "extended_slug": "economics-finance-domain/core-finance/taxes-topic/corporate-taxation", "kind": "Topic", "slug": "corporate-taxation"}], "in_knowledge_map": false, "description": "", "node_slug": "taxes-topic", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/core-finance/taxes-topic", "extended_slug": "economics-finance-domain/core-finance/taxes-topic", "kind": "Topic", "slug": "taxes-topic"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/", "id": "accounting-and-financial-stateme", "hide": false, "title": "Accounting and financial statements", "child_data": [{"kind": "Topic", "id": "x1b08d01e"}, {"kind": "Topic", "id": "x539171a1"}, {"kind": "Topic", "id": "x2804ca12"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/cash-accrual-accounting/", "id": "cash-accrual-accounting", "hide": false, "title": "Cash versus accrual accounting", "child_data": [{"kind": "Video", "id": "47066539"}, {"kind": "Video", "id": "47066540"}, {"kind": "Video", "id": "47066541"}], "children": [{"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/cash-accrual-accounting/cash-accounting/", "id": "FfdpupKByiU", "title": "Cash accounting", "kind": "Video", "description": "Simple example of cash accounting", "slug": "cash-accounting"}, {"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/cash-accrual-accounting/accrual-basis-of-accounting/", "id": "NNhyZFHAzaA", "title": "Accrual basis of accounting", "kind": "Video", "description": "Simple example of accrual accounting", "slug": "accrual-basis-of-accounting"}, {"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/cash-accrual-accounting/comparing-accrual-and-cash-accounting/", "id": "LU_6amWC6H8", "title": "Comparing accrual and cash accounting", "kind": "Video", "description": "Comparing Accrual and Cash Accounting", "slug": "comparing-accrual-and-cash-accounting"}], "in_knowledge_map": false, "description": "Just keeping track of cash that goes in and out of a business doesn't always reflect what's going on. This tutorial compares cash and accrual accounting. Very valuable if you ever plan on starting or investing in any type of business (you might also discover a nascent passion for accounting)!", "node_slug": "cash-accrual-accounting", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/accounting-and-financial-stateme/cash-accrual-accounting", "extended_slug": "economics-finance-domain/core-finance/accounting-and-financial-stateme/cash-accrual-accounting", "kind": "Topic", "slug": "cash-accrual-accounting"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/", "id": "financial-statements-tutorial", "hide": false, "title": "Three core financial statements", "child_data": [{"kind": "Video", "id": "47066542"}, {"kind": "Exercise", "id": "x4207f179"}, {"kind": "Exercise", "id": "x94fda4fc"}, {"kind": "Video", "id": "47066543"}, {"kind": "Video", "id": "47066544"}, {"kind": "Video", "id": "60049933"}], "children": [{"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/balance-sheet-and-income-statement-relationship/", "id": "hZvjH3Az87A", "title": "Balance sheet and income statement relationship", "kind": "Video", "description": "Balance Sheet and Income Statement Relationship", "slug": "balance-sheet-and-income-statement-relationship"}, {"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/interpreting-the-balance-sheet/", "id": "interpreting-the-balance-sheet", "title": "Interpreting the Balance Sheet", "description": "Learn the differences between Assets and Liabilities, and how to calculate Total Equity. Understand Balance Sheet items like Cash, Accounts Receivable, and Deferred Revenue.", "slug": "interpreting-the-balance-sheet", "kind": "Exercise"}, {"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/interpreting-the-income-statement-2/", "id": "interpreting-the-income-statement-2", "title": "Interpreting the Income Statement", "description": "Interpreting the Income Statement", "slug": "interpreting-the-income-statement-2", "kind": "Exercise"}, {"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/basic-cash-flow-statement/", "id": "Mioqyv_IW3E", "title": "Basic cash flow statement", "kind": "Video", "description": "Using a cash flow statement to reconcile net income with change in cash", "slug": "basic-cash-flow-statement"}, {"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/doing-the-example-with-accounts-payable-growing/", "id": "57gz50uTPqM", "title": "Doing the example with accounts payable growing", "kind": "Video", "description": "Introduction to Accounts Payable", "slug": "doing-the-example-with-accounts-payable-growing"}, {"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial/fair-value-accounting/", "id": "s-5_H3z-Cv0", "title": "Fair value accounting", "kind": "Video", "description": "Difference between Historical Cost and Fair Value Accounting", "slug": "fair-value-accounting"}], "in_knowledge_map": false, "description": "Corporations use three financial statements to report what's going on: balance sheets, cash flow statements and income statements. They can be derived from each other and each give a valuable lens on the operations and condition of a business. \n\nAfter you know the basics of accrual accounting (available in another tutorial), this tutorial will give you tools you need to responsibly understand any business.", "node_slug": "financial-statements-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial", "extended_slug": "economics-finance-domain/core-finance/accounting-and-financial-stateme/financial-statements-tutorial", "kind": "Topic", "slug": "financial-statements-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/depreciation-amortization-tut/", "id": "depreciation-amortization-tut", "hide": false, "title": "Depreciation and amortization", "child_data": [{"kind": "Video", "id": "49718014"}, {"kind": "Video", "id": "49718015"}, {"kind": "Video", "id": "49718016"}, {"kind": "Video", "id": "49718017"}], "children": [{"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/depreciation-amortization-tut/expensing-a-truck-leads-to-inconsistent-performance/", "id": "0E3PuHiDU9U", "title": "Expensing a truck leads to inconsistent performance", "kind": "Video", "description": "Expensing a truck leads to strange looking income statement", "slug": "expensing-a-truck-leads-to-inconsistent-performance"}, {"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/depreciation-amortization-tut/depreciating-the-truck/", "id": "iewvEGWARBY", "title": "Depreciating the truck", "kind": "Video", "description": "Depreciation the truck spreads out the expense", "slug": "depreciating-the-truck"}, {"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/depreciation-amortization-tut/depreciation-in-cash-flow/", "id": "uX2w0b8Qlss", "title": "Depreciation in cash flow", "kind": "Video", "description": "Depreciation in Cash Flow", "slug": "depreciation-in-cash-flow"}, {"path": "khan/economics-finance-domain/core-finance/accounting-and-financial-stateme/depreciation-amortization-tut/amortization-and-depreciation/", "id": "eKw3Aq0vvbo", "title": "Amortization and depreciation", "kind": "Video", "description": "Comparing depreciation and amortization", "slug": "amortization-and-depreciation"}], "in_knowledge_map": false, "description": "How do you account for things that get \"used up\" or a cost that should be spread over time. This tutorial has your answer. Depreciation and amortization might sound fancy, but you'll hopefully find them to be quite understandable.", "node_slug": "depreciation-amortization-tut", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/accounting-and-financial-stateme/depreciation-amortization-tut", "extended_slug": "economics-finance-domain/core-finance/accounting-and-financial-stateme/depreciation-amortization-tut", "kind": "Topic", "slug": "depreciation-amortization-tut"}], "in_knowledge_map": false, "description": "", "node_slug": "accounting-and-financial-stateme", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/core-finance/accounting-and-financial-stateme", "extended_slug": "economics-finance-domain/core-finance/accounting-and-financial-stateme", "kind": "Topic", "slug": "accounting-and-financial-stateme"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/", "id": "stock-and-bonds", "hide": false, "title": "Stocks and bonds", "child_data": [{"kind": "Topic", "id": "x333fd427"}, {"kind": "Topic", "id": "x6b721b34"}, {"kind": "Topic", "id": "x055d3c26"}, {"kind": "Topic", "id": "x0876d86e"}, {"kind": "Topic", "id": "x6ceac502"}, {"kind": "Topic", "id": "x90b4722a"}, {"kind": "Topic", "id": "x979e76ac"}, {"kind": "Topic", "id": "x71c2d102"}, {"kind": "Topic", "id": "xb414631e"}, {"kind": "Topic", "id": "x3ad0a080"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/stocks-intro-tutorial/", "id": "stocks-intro-tutorial", "hide": false, "title": "Introduction to stocks", "child_data": [{"kind": "Video", "id": "1536320"}, {"kind": "Video", "id": "24836"}], "children": [{"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/stocks-intro-tutorial/what-it-means-to-buy-a-company-s-stock/", "id": "98qfFzqDKR8", "title": "What it means to buy a company's stock", "kind": "Video", "description": "What it means to buy a company's stock", "slug": "what-it-means-to-buy-a-company-s-stock"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/stocks-intro-tutorial/bonds-vs-stocks/", "id": "rs1md3e4aYU", "title": "Bonds vs. stocks", "kind": "Video", "description": "The difference between a bond and a stock.", "slug": "bonds-vs-stocks"}], "in_knowledge_map": false, "description": "Many people own stocks, but, unfortunately, most of them don't really understand what they own. This tutorial will keep you from being one of those people (not keep you from owning stock, but keep you from being ignorant about your investments).", "node_slug": "stocks-intro-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds/stocks-intro-tutorial", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds/stocks-intro-tutorial", "kind": "Topic", "slug": "stocks-intro-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/shorting-stock/", "id": "shorting-stock", "hide": false, "title": "Shorting stock", "child_data": [{"kind": "Video", "id": "33794225"}, {"kind": "Video", "id": "4802239"}, {"kind": "Video", "id": "4802240"}, {"kind": "Video", "id": "4802241"}], "children": [{"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/shorting-stock/basic-shorting/", "id": "jAOtWm_WZiE", "title": "Basic shorting", "kind": "Video", "description": "Basic Shorting", "slug": "basic-shorting"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/shorting-stock/shorting-stock/", "id": "-IDmLERenrU", "title": "Shorting stock", "kind": "Video", "description": "What does it mean to short a stock?", "slug": "shorting-stock"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/shorting-stock/shorting-stock-2/", "id": "ucAUriWEFo8", "title": "Shorting stock 2", "kind": "Video", "description": "More on the mechanics of shorting stock.", "slug": "shorting-stock-2"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/shorting-stock/is-short-selling-bad/", "id": "zAkMhEqWFF0", "title": "Is short selling bad?", "kind": "Video", "description": "A discussion of the virtues and/or vices of short selling.", "slug": "is-short-selling-bad"}], "in_knowledge_map": false, "description": "Can you sell something that you borrowed from someone else? Why, yes, you can and it is called \"shorting\". Why would you do this? Well, you can now make money if the price goes down. Is this bad? This tutorial has your answers.", "node_slug": "shorting-stock", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds/shorting-stock", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds/shorting-stock", "kind": "Topic", "slug": "shorting-stock"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/company-statements-capital-struc/", "id": "company-statements-capital-struc", "hide": false, "title": "Understanding company statements and capital structure", "child_data": [{"kind": "Video", "id": "1263904077"}, {"kind": "Video", "id": "49718018"}, {"kind": "Video", "id": "49718019"}, {"kind": "Video", "id": "49718020"}], "children": [{"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/company-statements-capital-struc/gross-and-operating-profit/", "id": "7MjHWw3p710", "title": "Gross and operating profit", "kind": "Video", "description": "Difference between gross profit, operating profit, and net income.", "slug": "gross-and-operating-profit"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/company-statements-capital-struc/basic-capital-structure-differences/", "id": "YEZMReBbkP0", "title": "Basic capital structure differences", "kind": "Video", "description": "Understanding basic capital structure differences", "slug": "basic-capital-structure-differences"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/company-statements-capital-struc/market-capitalization/", "id": "5lmHzAHbtzg", "title": "Market capitalization", "kind": "Video", "description": "Market versus book value of equity", "slug": "market-capitalization"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/company-statements-capital-struc/market-value-of-assets/", "id": "nhW3Ri4b_V8", "title": "Market value of assets", "kind": "Video", "description": "Market value of assets.", "slug": "market-value-of-assets"}], "in_knowledge_map": false, "description": "If you understand what a stock is (also a good idea to look at the topic on accounting and financial statements), then you're ready to dig in a bit on a company's actual financials.\n\nThis tutorial does this to help you understand what the price of a company really is.", "node_slug": "company-statements-capital-struc", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds/company-statements-capital-struc", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds/company-statements-capital-struc", "kind": "Topic", "slug": "company-statements-capital-struc"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/", "id": "valuation-and-investing", "hide": false, "title": "Corporate metrics and valuation", "child_data": [{"kind": "Video", "id": "369056"}, {"kind": "Video", "id": "414003"}, {"kind": "Video", "id": "369057"}, {"kind": "Video", "id": "418008"}, {"kind": "Video", "id": "430003"}, {"kind": "Video", "id": "378043"}, {"kind": "Video", "id": "431002"}, {"kind": "Video", "id": "368054"}, {"kind": "Video", "id": "415006"}, {"kind": "Video", "id": "412023"}, {"kind": "Video", "id": "420004"}, {"kind": "Video", "id": "426004"}], "children": [{"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/price-and-market-capitalization/", "id": "fa-VZ-SDxgY", "title": "Price and market capitalization", "kind": "Video", "description": "Introduction to price and market capitalization", "slug": "price-and-market-capitalization"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/introduction-to-the-income-statement/", "id": "Z7C4cz2HkeY", "title": "Introduction to the income statement", "kind": "Video", "description": "The income statement, revenue, gross profit, operating profit, net income, ROA and ROE.", "slug": "introduction-to-the-income-statement"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/earnings-and-eps/", "id": "RouNXdkC0do", "title": "Earnings and EPS", "kind": "Video", "description": "Earnings, EPS (earnings per share) and how they relate to the income statement and balance sheet", "slug": "earnings-and-eps"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/introduction-to-the-price-to-earnings-ratio/", "id": "cppxO67e6eo", "title": "Introduction to the price-to-earnings ratio", "kind": "Video", "description": "Price to Earnings Ration (or P/E ratio).", "slug": "introduction-to-the-price-to-earnings-ratio"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/p-e-discussion/", "id": "V-rko8jgJ9o", "title": "P/E discussion", "kind": "Video", "description": "Discussion of the price-to-earnings ratio", "slug": "p-e-discussion"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/roa-discussion-1/", "id": "Oh4H3BJX1ZI", "title": "ROA discussion 1", "kind": "Video", "description": "A discussion of the various ways to measure return on assets", "slug": "roa-discussion-1"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/roa-discussion-2/", "id": "R_5slDeVCQk", "title": "ROA discussion 2", "kind": "Video", "description": "More on the return on asset discussion.", "slug": "roa-discussion-2"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/depreciation/", "id": "a5sFUXkxyGc", "title": "Depreciation", "kind": "Video", "description": "Depreciation a capital asset", "slug": "depreciation"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/amortization/", "id": "XfR3JSkSkJM", "title": "Amortization", "kind": "Video", "description": "Introduction to amortization", "slug": "amortization"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/p-e-conundrum/", "id": "VrFbXxkl9JU", "title": "P/E conundrum", "kind": "Video", "description": "A situation where the price to earnings ratio seems to not fairly price an asset", "slug": "p-e-conundrum"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/enterprise-value/", "id": "pa92UdJCaos", "title": "Enterprise value", "kind": "Video", "description": "Solving the P/E conundrum by looking at a different valuation metric (enterprise value)", "slug": "enterprise-value"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing/ebitda/", "id": "v4Fq9LEspzw", "title": "EBITDA", "kind": "Video", "description": "Review of Enterprise Value and comparing it to EBITDA", "slug": "ebitda"}], "in_knowledge_map": false, "description": "Life is full of people who will try to convince you that something is a good or bad idea by spouting technical jargon. Most of them have no idea what they are talking about. Don't be one of those people or their victims when it comes to stocks.\n\nFrom P/E rations to EV/EBITDA, we've got your back!", "node_slug": "valuation-and-investing", "render_type": "UncuratedTutorial", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds/valuation-and-investing", "kind": "Topic", "slug": "valuation-and-investing"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/", "id": "venture-capital-and-capital-markets", "hide": false, "title": "Life of a company--from birth to death", "child_data": [{"kind": "Video", "id": "24826"}, {"kind": "Video", "id": "24828"}, {"kind": "Video", "id": "24830"}, {"kind": "Video", "id": "24832"}, {"kind": "Video", "id": "24834"}, {"kind": "Video", "id": "26306"}, {"kind": "Video", "id": "24836"}, {"kind": "Video", "id": "24838"}, {"kind": "Video", "id": "24840"}], "children": [{"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/raising-money-for-a-startup/", "id": "8OCjwBkMJ_E", "title": "Raising money for a startup", "kind": "Video", "description": "Raising money from an angel investor. Pre-money and post-money valuation.", "slug": "raising-money-for-a-startup"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/getting-a-seed-round-from-a-vc/", "id": "-hJj5NpWUXQ", "title": "Getting a seed round from a VC", "kind": "Video", "description": "Series A funding from a seed venture capitalist.", "slug": "getting-a-seed-round-from-a-vc"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/going-back-to-the-till-series-b/", "id": "m28RAgUySGQ", "title": "Going back to the till: Series B", "kind": "Video", "description": "More on the series A financing. Going back for another round with a series B financing.", "slug": "going-back-to-the-till-series-b"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/an-ipo/", "id": "ywOr4OYqXOs", "title": "An IPO", "kind": "Video", "description": "The initial public offering of our online sock company.", "slug": "an-ipo"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/more-on-ipos/", "id": "opEy6iN9kqc", "title": "More on IPOs", "kind": "Video", "description": "Public vs. Private Equity. Why people buy equity to begin with.", "slug": "more-on-ipos"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/equity-vs-debt/", "id": "yQtUyBrRBx4", "title": "Equity vs. debt", "kind": "Video", "description": "Debt vs. Equity. Market Capitalization, Asset Value, and Enterprise Value.", "slug": "equity-vs-debt"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/bonds-vs-stocks/", "id": "rs1md3e4aYU", "title": "Bonds vs. stocks", "kind": "Video", "description": "The difference between a bond and a stock.", "slug": "bonds-vs-stocks"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/chapter-7-bankruptcy-liquidation/", "id": "-oW4M3vpuRM", "title": "Chapter 7: Bankruptcy liquidation", "kind": "Video", "description": "Introduction to bankruptcy liquidation (Chapter 7)", "slug": "chapter-7-bankruptcy-liquidation"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets/chapter-11-bankruptcy-restructuring/", "id": "mxVWyzzMOXM", "title": "Chapter 11: Bankruptcy restructuring", "kind": "Video", "description": "Chapter 11: Restructuring through a bankruptcy", "slug": "chapter-11-bankruptcy-restructuring"}], "in_knowledge_map": false, "description": "This is an old set of videos, but if you put up with Sal's messy handwriting (it has since improved) and spotty sound, there is a lot to be learned here. In particular, this tutorial walks through starting, financing and taking public a company (and even talks about what happens if it has trouble paying its debts).", "node_slug": "venture-capital-and-capital-markets", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds/venture-capital-and-capital-markets", "kind": "Topic", "slug": "venture-capital-and-capital-markets"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/dilution-tutorial/", "id": "dilution-tutorial", "hide": false, "title": "Dilution", "child_data": [{"kind": "Video", "id": "85588688"}], "children": [{"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/dilution-tutorial/stock-dilution/", "id": "tjQzJ7GY0GY", "title": "Stock dilution", "kind": "Video", "description": "Why the value per share does not really get diluted when more shares are issued in a secondary offering", "slug": "stock-dilution"}], "in_knowledge_map": false, "description": "When companies issue new shares, many people consider this a share \"dilution\"--implying that the value of each share has been \"watered down\" a bit. This tutorial walks through the mechanics and why--assuming management isn't doing something stupid--the shares might not be diluted at all.", "node_slug": "dilution-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds/dilution-tutorial", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds/dilution-tutorial", "kind": "Topic", "slug": "dilution-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/mergers-acquisitions/", "id": "mergers-acquisitions", "hide": false, "title": "Mergers and acquisitions", "child_data": [{"kind": "Video", "id": "85588689"}, {"kind": "Video", "id": "85588690"}, {"kind": "Video", "id": "85588691"}], "children": [{"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/mergers-acquisitions/acquisitions-with-shares/", "id": "DMd9mTyzj6k", "title": "Acquisitions with shares", "kind": "Video", "description": "Mechanics of a share-based acquisition", "slug": "acquisitions-with-shares"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/mergers-acquisitions/price-behavior-after-announced-acquisition/", "id": "7zBqVOuEKYE", "title": "Price behavior after announced acquisition", "kind": "Video", "description": "Stock Price Behavior After Announced Acquisition with Shares", "slug": "price-behavior-after-announced-acquisition"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/mergers-acquisitions/simple-merger-arb-with-share-acquisition/", "id": "CzDA0WCdWHQ", "title": "Simple merger arbitrage with share acquisition", "kind": "Video", "description": "Showing how a merger arbitrage player might act if they were sure that a transaction would go through", "slug": "simple-merger-arb-with-share-acquisition"}], "in_knowledge_map": false, "description": "Companies often buy or merge with other companies using shares (which is sometimes less intuitive than when they use cash). This tutorial walks through the mechanics of how this happens and details what is likely to happen in the public markets because of the transaction (including opportunities for arbitrage).", "node_slug": "mergers-acquisitions", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds/mergers-acquisitions", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds/mergers-acquisitions", "kind": "Topic", "slug": "mergers-acquisitions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/leveraged-buy-outs/", "id": "leveraged-buy-outs", "hide": false, "title": "Leveraged buy-outs", "child_data": [{"kind": "Video", "id": "85588692"}], "children": [{"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/leveraged-buy-outs/basic-leveraged-buyout-lbo/", "id": "LVMLs2z1JYg", "title": "Basic leveraged buyout (LBO)", "kind": "Video", "description": "The mechanics of a simple leveraged buy-out", "slug": "basic-leveraged-buyout-lbo"}], "in_knowledge_map": false, "description": "Private equity firms often borrow money (use leverage) to buy companies. This tutorial explains how they do it and pay the debt.", "node_slug": "leveraged-buy-outs", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds/leveraged-buy-outs", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds/leveraged-buy-outs", "kind": "Topic", "slug": "leveraged-buy-outs"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/", "id": "bonds-tutorial", "hide": false, "title": "Bonds", "child_data": [{"kind": "Video", "id": "87122224"}, {"kind": "Video", "id": "1559307"}, {"kind": "Video", "id": "24848"}, {"kind": "Video", "id": "1595282"}, {"kind": "Video", "id": "84536768"}, {"kind": "Video", "id": "84536769"}, {"kind": "Video", "id": "84536770"}], "children": [{"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/corporate-debt-versus-traditional-mortgages/", "id": "rD25slnTqAE", "title": "Corporate debt versus traditional mortgages", "kind": "Video", "description": "Understanding how most corporate debt is different than most personal mortgages", "slug": "corporate-debt-versus-traditional-mortgages"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/introduction-to-bonds/", "id": "Qh-M3_L4xYk", "title": "Introduction to bonds", "kind": "Video", "description": "What it means to buy a bond", "slug": "introduction-to-bonds"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/introduction-to-the-yield-curve/", "id": "b_cAxh44aNQ", "title": "Introduction to the yield curve", "kind": "Video", "description": "Introduction to the treasury yield curve.", "slug": "introduction-to-the-yield-curve"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/relationship-between-bond-prices-and-interest-rates/", "id": "I7FDx4DPapw", "title": "Relationship between bond prices and interest rates", "kind": "Video", "description": "Why bond prices move inversely to changes in interest rate", "slug": "relationship-between-bond-prices-and-interest-rates"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/treasury-bond-prices-and-yields/", "id": "mS7t91U9Qqg", "title": "Treasury bond prices and yields", "kind": "Video", "description": "Why yields go down when prices go up", "slug": "treasury-bond-prices-and-yields"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/annual-interest-varying-with-debt-maturity/", "id": "YdGZaqJZbGc", "title": "Annual interest varying with debt maturity", "kind": "Video", "description": "Annual Interest Varying with Debt Maturity", "slug": "annual-interest-varying-with-debt-maturity"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial/the-yield-curve/", "id": "SwB9Fq5VRZY", "title": "The yield curve", "kind": "Video", "description": "The Yield Curve", "slug": "the-yield-curve"}], "in_knowledge_map": false, "description": "Both corporations and governments can borrow money by selling bonds. This tutorial explains how this works and how bond prices relate to interest rates. In general, understanding this not only helps you with your own investing, but gives you a lens on the entire global economy.", "node_slug": "bonds-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds/bonds-tutorial", "kind": "Topic", "slug": "bonds-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/stock-and-bonds/corp-bankruptcy-tutorial/", "id": "corp-bankruptcy-tutorial", "hide": false, "title": "Corporate bankruptcy", "child_data": [{"kind": "Video", "id": "24838"}, {"kind": "Video", "id": "24840"}], "children": [{"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/corp-bankruptcy-tutorial/chapter-7-bankruptcy-liquidation/", "id": "-oW4M3vpuRM", "title": "Chapter 7: Bankruptcy liquidation", "kind": "Video", "description": "Introduction to bankruptcy liquidation (Chapter 7)", "slug": "chapter-7-bankruptcy-liquidation"}, {"path": "khan/economics-finance-domain/core-finance/stock-and-bonds/corp-bankruptcy-tutorial/chapter-11-bankruptcy-restructuring/", "id": "mxVWyzzMOXM", "title": "Chapter 11: Bankruptcy restructuring", "kind": "Video", "description": "Chapter 11: Restructuring through a bankruptcy", "slug": "chapter-11-bankruptcy-restructuring"}], "in_knowledge_map": false, "description": "Anybody or anything (you can decide if a corporation is a person) can have trouble paying its debts. This tutorial walks through what happens to a corporation in these circumstances.", "node_slug": "corp-bankruptcy-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds/corp-bankruptcy-tutorial", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds/corp-bankruptcy-tutorial", "kind": "Topic", "slug": "corp-bankruptcy-tutorial"}], "in_knowledge_map": false, "description": "", "node_slug": "stock-and-bonds", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/core-finance/stock-and-bonds", "extended_slug": "economics-finance-domain/core-finance/stock-and-bonds", "kind": "Topic", "slug": "stock-and-bonds"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/", "id": "investment-vehicles-tutorial", "hide": false, "title": "Investment vehicles, insurance and retirement", "child_data": [{"kind": "Topic", "id": "x9b359511"}, {"kind": "Topic", "id": "x41950189"}, {"kind": "Topic", "id": "x7473dee3"}, {"kind": "Topic", "id": "x02a1339d"}, {"kind": "Topic", "id": "x2334e4f7"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds/", "id": "mutual-funds", "hide": false, "title": "Mutual funds and ETFs", "child_data": [{"kind": "Video", "id": "65171993"}, {"kind": "Video", "id": "65171994"}, {"kind": "Video", "id": "65171995"}, {"kind": "Video", "id": "65171996"}, {"kind": "Video", "id": "24925"}], "children": [{"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds/open-ended-mutual-fund-part-1/", "id": "DzYwB3uSU-c", "title": "Open-ended mutual fund (part 1)", "kind": "Video", "description": "Introduction to Open-Ended Mutual Funds", "slug": "open-ended-mutual-fund-part-1"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds/open-end-mutual-fund-redemptions/", "id": "nW1rxuQft1o", "title": "Open-end mutual fund redemptions (part 2)", "kind": "Video", "description": "Understanding the mechanics of an open end mutual fund a bit better", "slug": "open-end-mutual-fund-redemptions"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds/closed-end-mutual-funds/", "id": "VpVu25KhozQ", "title": "Closed-end mutual funds", "kind": "Video", "description": "Comparing closed-end and open-ended mutual funds", "slug": "closed-end-mutual-funds"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds/exchange-traded-funds-etfs/", "id": "SFdsY9Rdh6w", "title": "Exchange traded funds (ETFs)", "kind": "Video", "description": "Comparing ETF's, open-end, and closed-end funds", "slug": "exchange-traded-funds-etfs"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds/ponzi-schemes/", "id": "5UVpLPtgdF4", "title": "Ponzi schemes", "kind": "Video", "description": "Ponzi Schemes", "slug": "ponzi-schemes"}], "in_knowledge_map": false, "description": "If we're not in the mood to research and pick our own stocks, mutual funds and/or ETFs might be a good option. This tutorial explains what they are and how they are different.", "node_slug": "mutual-funds", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds", "extended_slug": "economics-finance-domain/core-finance/investment-vehicles-tutorial/mutual-funds", "kind": "Topic", "slug": "mutual-funds"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/ira-401ks/", "id": "ira-401ks", "hide": false, "title": "Retirement accounts: IRAs and 401ks", "child_data": [{"kind": "Video", "id": "1644551"}, {"kind": "Video", "id": "1626784"}, {"kind": "Video", "id": "8187381"}], "children": [{"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/ira-401ks/traditional-iras/", "id": "UV8kgqk_DAY", "title": "Traditional IRAs", "kind": "Video", "description": "Introduction to traditional IRA's (Individual Retirement Accounts)", "slug": "traditional-iras"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/ira-401ks/roth-iras/", "id": "th06SCNNZ60", "title": "Roth IRAs", "kind": "Video", "description": "Introduction to Roth IRA's", "slug": "roth-iras"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/ira-401ks/401-k-s/", "id": "2zfdtmlMNDs", "title": "401(k)s", "kind": "Video", "description": "401(k)s (and how they compare to IRAs)", "slug": "401-k-s"}], "in_knowledge_map": false, "description": "The government apparently wants us to save for retirement (not always obvious because it also wants us to spend as much as possible to pump the economy going into the next election cycle). To encourage this, it has created some ways to save that avoid or defer taxes: IRAs and 401ks.", "node_slug": "ira-401ks", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/investment-vehicles-tutorial/ira-401ks", "extended_slug": "economics-finance-domain/core-finance/investment-vehicles-tutorial/ira-401ks", "kind": "Topic", "slug": "ira-401ks"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/life-insurance/", "id": "life-insurance", "hide": false, "title": "Life insurance", "child_data": [{"kind": "Video", "id": "109588139"}, {"kind": "Video", "id": "109588138"}, {"kind": "Video", "id": "65229378"}], "children": [{"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/life-insurance/term-and-whole-life-insurance-policies/", "id": "uGpLS_pr7oc", "title": "Term and whole life insurance policies", "kind": "Video", "description": "Overview of the difference between term and whole life insurance policies", "slug": "term-and-whole-life-insurance-policies"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/life-insurance/term-and-whole-life-insurance-policies-2/", "id": "MYkR32QOdg0", "title": "Term and whole life insurance policies 2", "kind": "Video", "description": "What happens to the cash payout in a whole life policy when someone dies?", "slug": "term-and-whole-life-insurance-policies-2"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/life-insurance/term-life-insurance-and-death-probability/", "id": "NSSoMafbBqQ", "title": "Term life insurance and death probability", "kind": "Video", "description": "Understanding an insurance company's sense of my chances of dying.", "slug": "term-life-insurance-and-death-probability"}], "in_knowledge_map": false, "description": "It is a bit of a downer to think about, but we are all going to die. Do we care what happens to our loved ones (if they really are \"loved\" than the answer is obvious). This tutorial walks us through the options to insure our families against losing us. The reason why we stuck it in the \"investment vehicles\" topic is because it can also be an investment that we can use before we die.", "node_slug": "life-insurance", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/investment-vehicles-tutorial/life-insurance", "extended_slug": "economics-finance-domain/core-finance/investment-vehicles-tutorial/life-insurance", "kind": "Topic", "slug": "life-insurance"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/", "id": "hedge-funds", "hide": false, "title": "Hedge funds", "child_data": [{"kind": "Video", "id": "65171997"}, {"kind": "Video", "id": "65171998"}, {"kind": "Video", "id": "65171999"}, {"kind": "Video", "id": "65172000"}, {"kind": "Video", "id": "84546654"}, {"kind": "Video", "id": "84546655"}, {"kind": "Video", "id": "84546656"}], "children": [{"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/hedge-funds-intro/", "id": "Qb7tbWuDc2U", "title": "Hedge funds intro", "kind": "Video", "description": "Overview of how hedge funds are different than mutual funds", "slug": "hedge-funds-intro"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/hedge-fund-structure-and-fees/", "id": "EX1eFeaTiYM", "title": "Hedge fund structure and fees", "kind": "Video", "description": "Understanding how hedge funds are structured and how the managers get paid", "slug": "hedge-fund-structure-and-fees"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/are-hedge-funds-bad/", "id": "vD2WJTIEVv0", "title": "Are hedge funds bad?", "kind": "Video", "description": "Thinking about how hedge funds are different from other institutions", "slug": "are-hedge-funds-bad"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/hedge-funds-venture-capital-and-private-equity/", "id": "bLQBbA8yh7c", "title": "Hedge funds, venture capital, and private equity", "kind": "Video", "description": "Similarities in compensation structure for hedge funds, venture capital firms, and private equity investors", "slug": "hedge-funds-venture-capital-and-private-equity"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/hedge-fund-strategies-long-short-1/", "id": "nTco9qQ2elM", "title": "Hedge fund strategies: Long short 1", "kind": "Video", "description": "Setting up a simple long-short hedge (assuming the companies have similar beta or correlation with market)", "slug": "hedge-fund-strategies-long-short-1"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/hedge-fund-strategies-long-short-2/", "id": "5UUa0V-MAqI", "title": "Hedge fund strategies: Long short 2", "kind": "Video", "description": "Seeing how the long-short portfolio might do in different market conditions (assuming that the underlying thesis is right)", "slug": "hedge-fund-strategies-long-short-2"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds/hedge-fund-strategies-merger-arbitrage-1/", "id": "3qP8OOr7pfI", "title": "Hedge fund strategies: Merger arbitrage 1", "kind": "Video", "description": "Simple case of merger arbitrage when there is an all cash acquisition", "slug": "hedge-fund-strategies-merger-arbitrage-1"}], "in_knowledge_map": false, "description": "Hedge funds have absolutely nothing to do with shrubbery. Their name comes from the fact that early hedge funds (and some current ones) tried to \"hedge\" their exposure to the market (so they could, in theory, do well in an \"up\" or \"down\" market as long as they were good at picking the good companies). Today, hedge funds represent a huge class investment funds. \n\nThey are far less regulated than, say, mutual funds. In exchange for this, they aren't allowed to market or take investments from \"unsophisticated\" investors. Some use their flexibility to mitigate risk, other use it to amplify it.", "node_slug": "hedge-funds", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds", "extended_slug": "economics-finance-domain/core-finance/investment-vehicles-tutorial/hedge-funds", "kind": "Topic", "slug": "hedge-funds"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/", "id": "investment-consumption", "hide": false, "title": "Investment and consumption", "child_data": [{"kind": "Video", "id": "109588142"}, {"kind": "Video", "id": "109588141"}, {"kind": "Video", "id": "24842"}, {"kind": "Video", "id": "24880"}, {"kind": "Video", "id": "24882"}, {"kind": "Video", "id": "24684"}, {"kind": "Video", "id": "24686"}, {"kind": "Video", "id": "65171990"}], "children": [{"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/risk-and-reward-introduction/", "id": "mv5zucjq60k", "title": "Risk and reward introduction", "kind": "Video", "description": "Basic introduction to risk and reward", "slug": "risk-and-reward-introduction"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/human-capital/", "id": "ivy1QmWUtQI", "title": "Human capital", "kind": "Video", "description": "Basic overview of capital and human capital", "slug": "human-capital"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/return-on-capital/", "id": "9T6ZPYYu_Dk", "title": "Return on capital", "kind": "Video", "description": "Introduction to return on capital and cost of capital. Using these concepts to decide where to invest.", "slug": "return-on-capital"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/investment-vs-consumption-1/", "id": "rEiLOB4FulY", "title": "Investment vs. consumption 1", "kind": "Video", "description": "The difference between investment and consumption.", "slug": "investment-vs-consumption-1"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/investment-vs-comsumption-2/", "id": "xRjfRVXXFxU", "title": "Investment vs. consumption 2", "kind": "Video", "description": "More investment vs. consumption examples.", "slug": "investment-vs-comsumption-2"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/wealth-destruction-1/", "id": "Q7HbtnOyKMg", "title": "Wealth destruction 1", "kind": "Video", "description": "How bubbles destroy wealth.", "slug": "wealth-destruction-1"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/wealth-destruction-2/", "id": "eRImmzuExyg", "title": "Wealth destruction 2", "kind": "Video", "description": "How bubbles destroy wealth.", "slug": "wealth-destruction-2"}, {"path": "khan/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption/back-of-envelope-office-space-conundrum/", "id": "bAU1MLRwh7c", "title": "Back-of-envelope office space conundrum", "kind": "Video", "description": "Back of the envelope calculation of which office space to rent", "slug": "back-of-envelope-office-space-conundrum"}], "in_knowledge_map": false, "description": "When are you using capital to create more things (investment) vs. for consumption (we all need to consume a bit to be happy). When you do invest, how do you compare risk to return? Can capital include human abilities?\n\nThis tutorial hodge-podge covers it all.", "node_slug": "investment-consumption", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption", "extended_slug": "economics-finance-domain/core-finance/investment-vehicles-tutorial/investment-consumption", "kind": "Topic", "slug": "investment-consumption"}], "in_knowledge_map": false, "description": "", "node_slug": "investment-vehicles-tutorial", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/core-finance/investment-vehicles-tutorial", "extended_slug": "economics-finance-domain/core-finance/investment-vehicles-tutorial", "kind": "Topic", "slug": "investment-vehicles-tutorial"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/core-finance/money-and-banking/", "id": "money-and-banking", "hide": false, "title": "Money, banking and central banks", "child_data": [{"kind": "Topic", "id": "xb83f15d3"}, {"kind": "Topic", "id": "x19673812"}, {"kind": "Topic", "id": "x0b27fe22"}, {"kind": "Topic", "id": "x06ee4311"}, {"kind": "Topic", "id": "xa59693c5"}, {"kind": "Topic", "id": "xdd28c02b"}, {"kind": "Topic", "id": "x0a1428a7"}, {"kind": "Topic", "id": "xa753311c"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/", "id": "banking-and-money", "hide": false, "title": "Banking and money", "child_data": [{"kind": "Video", "id": "23868"}, {"kind": "Video", "id": "23870"}, {"kind": "Video", "id": "23872"}, {"kind": "Video", "id": "23874"}, {"kind": "Video", "id": "23876"}, {"kind": "Video", "id": "23878"}, {"kind": "Video", "id": "23880"}, {"kind": "Video", "id": "23882"}, {"kind": "Video", "id": "23884"}, {"kind": "Video", "id": "23886"}, {"kind": "Video", "id": "23888"}, {"kind": "Video", "id": "23890"}, {"kind": "Video", "id": "23892"}, {"kind": "Video", "id": "23894"}, {"kind": "Video", "id": "23896"}, {"kind": "Video", "id": "23898"}, {"kind": "Video", "id": "23900"}, {"kind": "Video", "id": "23902"}, {"kind": "Video", "id": "23904"}, {"kind": "Video", "id": "23906"}, {"kind": "Video", "id": "23908"}, {"kind": "Video", "id": "23910"}, {"kind": "Video", "id": "23912"}, {"kind": "Video", "id": "23914"}, {"kind": "Video", "id": "60049932"}], "children": [{"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-1/", "id": "E-HOz8T6tAo", "title": "Banking 1", "kind": "Video", "description": "Introduction to how banks make money and the value they (potentially) add to society.", "slug": "banking-1"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-2-a-bank-s-income-statement/", "id": "h3lMANILkw0", "title": "Banking 2: A bank's income statement", "kind": "Video", "description": "Introduction to the income statement of a bank (and to income statements in general).", "slug": "banking-2-a-bank-s-income-statement"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-3-fractional-reserve-banking/", "id": "nH2-37rTA8U", "title": "Banking 3: Fractional reserve banking", "kind": "Video", "description": "Fractional reserve banking and the multiplier effect. Introduction to the money supply.", "slug": "banking-3-fractional-reserve-banking"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-4-multiplier-effect-and-the-money-supply/", "id": "F7r7l1VG-Tw", "title": "Banking 4: Multiplier effect and the money supply", "kind": "Video", "description": "How \"money\" is created in a fractional reserve banking system. M0 and M1 definitions of the money suppy. The multiplier effect.", "slug": "banking-4-multiplier-effect-and-the-money-supply"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-5-introduction-to-bank-notes/", "id": "cNFLqhU4MN0", "title": "Banking 5: Introduction to bank notes", "kind": "Video", "description": "Introduction to bank notes (which you are more familiar with than you realize).", "slug": "banking-5-introduction-to-bank-notes"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-6-bank-notes-and-checks/", "id": "IOzZVmgK3IM", "title": "Banking 6: Bank notes and checks", "kind": "Video", "description": "More on how bank notes and checks can be used.", "slug": "banking-6-bank-notes-and-checks"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-7-giving-out-loans-without-giving-out-gold/", "id": "On3c86V5A_E", "title": "Banking 7: Giving out loans without giving out gold", "kind": "Video", "description": "How banks can give out loans without ever giving out gold.", "slug": "banking-7-giving-out-loans-without-giving-out-gold"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-8-reserve-ratios/", "id": "VP3nKDUw1jA", "title": "Banking 8: Reserve ratios", "kind": "Video", "description": "How reserve requirements limit how much lending a bank can do.", "slug": "banking-8-reserve-ratios"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-9-more-on-reserve-ratios-bad-sound/", "id": "DFPBdbx0vFc", "title": "Banking 9: More on reserve ratios (bad sound)", "kind": "Video", "description": "Seeing how reserve ratios limit how much lending I can do.", "slug": "banking-9-more-on-reserve-ratios-bad-sound"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-10-introduction-to-leverage-bad-sound/", "id": "8fxilNdEQTo", "title": "Banking 10: Introduction to leverage (bad sound)", "kind": "Video", "description": "What leverage is. Why it is is good or bad. Leverage and insolvency.", "slug": "banking-10-introduction-to-leverage-bad-sound"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-11-a-reserve-bank/", "id": "M-4GWomLbpc", "title": "Banking 11: A reserve bank", "kind": "Video", "description": "Introduction to the idea of a reserve bank.", "slug": "banking-11-a-reserve-bank"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-12-treasuries-government-debt/", "id": "JBWdbzzYbtU", "title": "Banking 12: Treasuries (government debt)", "kind": "Video", "description": "Introduction to government debt and treasuries. What it means when we say that Federal Reserve Notes are issued by the Reserve bank but are an obligation of the Government.", "slug": "banking-12-treasuries-government-debt"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-13-open-market-operations/", "id": "BTNarhvGX88", "title": "Banking 13: Open market operations", "kind": "Video", "description": "Tools of the Central Bank to increase the money supply.", "slug": "banking-13-open-market-operations"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-14-fed-funds-rate/", "id": "IniG1KkPS2c", "title": "Banking 14: Fed funds rate", "kind": "Video", "description": "How open market operations effect the rate at which banks lend to each other overnight.", "slug": "banking-14-fed-funds-rate"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-15-more-on-the-fed-funds-rate/", "id": "rgqFXkLAc-4", "title": "Banking 15: More on the Fed funds rate", "kind": "Video", "description": "More on the mechanics of the Federal Funds rate and how it increases the money supply.", "slug": "banking-15-more-on-the-fed-funds-rate"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-16-why-target-rates-vs-money-supply/", "id": "yOgGhPIHnlA", "title": "Banking 16: Why target rates vs. money supply", "kind": "Video", "description": "The rationale for targeting interest rates instead of directly having a money supply target.", "slug": "banking-16-why-target-rates-vs-money-supply"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-17-what-happened-to-the-gold/", "id": "NFDMXwwzyIM", "title": "Banking 17: What happened to the gold?", "kind": "Video", "description": "Getting off the gold standard. A short discussion of the meaning of wealth.", "slug": "banking-17-what-happened-to-the-gold"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/banking-18-big-picture-discussion/", "id": "T9byZBGtGuw", "title": "Banking 18: Big picture discussion", "kind": "Video", "description": "Pros and Cons of various banking systems. More on gold.", "slug": "banking-18-big-picture-discussion"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/the-discount-rate/", "id": "FxkTSjctXdk", "title": "The discount rate", "kind": "Video", "description": "The discount rate and window. Lender of last resort.", "slug": "the-discount-rate"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/repurchase-agreements-repo-transactions/", "id": "QWninXOAMXE", "title": "Repurchase agreements (repo transactions)", "kind": "Video", "description": "Mechanics of repurchase agreements (repo transactions/loans)", "slug": "repurchase-agreements-repo-transactions"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/federal-reserve-balance-sheet/", "id": "MILF-9GeMDQ", "title": "Federal Reserve balance sheet", "kind": "Video", "description": "Analysis of the federal reserve balance sheet as of Feb 2007.", "slug": "federal-reserve-balance-sheet"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/fractional-reserve-banking-commentary-1/", "id": "ZyyaE3DIxhc", "title": "Fractional Reserve banking commentary 1", "kind": "Video", "description": "Understanding the weak points of Fractional Reserve Banking", "slug": "fractional-reserve-banking-commentary-1"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/frb-commentary-2-deposit-insurance/", "id": "otstXFxMkl4", "title": "FRB commentary 2: Deposit insurance", "kind": "Video", "description": "More on the weaknesses of fractional reserve banking. The FDIC and deposit insurance and its side effects.", "slug": "frb-commentary-2-deposit-insurance"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/frb-commentary-3-big-picture/", "id": "8SAMey9Gl5I", "title": "FRB commentary 3: Big picture", "kind": "Video", "description": "Summary of thoughts in last two videos. Discussion of why Fractional Reserve Banking is a subsidy to banks and allows them to arbitrage the yield curve.", "slug": "frb-commentary-3-big-picture"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/banking-and-money/libor/", "id": "wBCowBiXV7A", "title": "LIBOR", "kind": "Video", "description": "London InterBank Offer Rate", "slug": "libor"}], "in_knowledge_map": false, "description": "We all use money and most of us use banks. Despite this, the actual working of the banking system is a bit of a mystery to most (especially fractional reserve banking).\n\nThis older tutorial (bad handwriting and resolution) starts from a basic society looking to do more than barter and incrementally builds to a modern society with fraction reserve banking. Through this process, you will hopefully gain a deep understanding of how money and banking works in our modern world.", "node_slug": "banking-and-money", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/money-and-banking/banking-and-money", "extended_slug": "economics-finance-domain/core-finance/money-and-banking/banking-and-money", "kind": "Topic", "slug": "banking-and-money"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/", "id": "federal-reserve", "hide": false, "title": "Quantitative easing", "child_data": [{"kind": "Video", "id": "84536771"}, {"kind": "Video", "id": "84536772"}, {"kind": "Video", "id": "84546653"}, {"kind": "Video", "id": "95907355"}, {"kind": "Video", "id": "95907356"}, {"kind": "Video", "id": "95907357"}], "children": [{"path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/fed-open-market-operations/", "id": "wDuCOxDxMzY", "title": "Fed open market operations", "kind": "Video", "description": "Fed Open Market Operations", "slug": "fed-open-market-operations"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/quantitative-easing/", "id": "kc_HjPT4NKo", "title": "Quantitative easing", "kind": "Video", "description": "Overview of quantitative easing", "slug": "quantitative-easing"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/more-on-quantitative-easing-and-credit-easing/", "id": "ZrKw-SLzNrw", "title": "More on quantitative easing (and credit easing)", "kind": "Video", "description": "Understanding the difference between quantitative easing in Japan and the United States", "slug": "more-on-quantitative-easing-and-credit-easing"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/open-market-operations-and-quantitative-easing-overview/", "id": "TpLlJ8-AnQM", "title": "Open market operations and quantitative easing overview", "kind": "Video", "description": "Basic difference between traditional open market operations and quantitative easing.", "slug": "open-market-operations-and-quantitative-easing-overview"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/another-quantitative-easing-video/", "id": "Lmd_CDwBXFs", "title": "Another quantitative easing video", "kind": "Video", "description": "More on quantitative easing", "slug": "another-quantitative-easing-video"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/federal-reserve/us-and-japanese-quantitative-easing/", "id": "a-R8qpea6lc", "title": "US and Japanese quantitative easing", "kind": "Video", "description": "Comparing quantitative easing in Japan to \"credit easing\" in the United States", "slug": "us-and-japanese-quantitative-easing"}], "in_knowledge_map": false, "description": "You know that the Federal Reserve (or central banks in general) controls the money supply and short-term interest rates. But how exactly do they do this. Even more, how is \"quantitative easing\" different than regular open market operations.\n\nThis tutorial explains it all in the context of the Federal Reserves attempts to stave off deflation during the 2008-2012 recession.", "node_slug": "federal-reserve", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/money-and-banking/federal-reserve", "extended_slug": "economics-finance-domain/core-finance/money-and-banking/federal-reserve", "kind": "Topic", "slug": "federal-reserve"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/", "id": "bank-bailout", "hide": false, "title": "2008 bank bailout", "child_data": [{"kind": "Video", "id": "24858"}, {"kind": "Video", "id": "24860"}, {"kind": "Video", "id": "24862"}, {"kind": "Video", "id": "24864"}, {"kind": "Video", "id": "24866"}, {"kind": "Video", "id": "24868"}, {"kind": "Video", "id": "24870"}, {"kind": "Video", "id": "24872"}, {"kind": "Video", "id": "24874"}, {"kind": "Video", "id": "24876"}, {"kind": "Video", "id": "24884"}, {"kind": "Video", "id": "24886"}, {"kind": "Video", "id": "24678"}, {"kind": "Video", "id": "24891"}, {"kind": "Video", "id": "24893"}, {"kind": "Video", "id": "6022692"}], "children": [{"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-1-liquidity-vs-solvency/", "id": "ZUEjRYe7MRk", "title": "Bailout 1: Liquidity vs. solvency", "kind": "Video", "description": "Review of balance sheets. Difference between illiquidity and insolvency.", "slug": "bailout-1-liquidity-vs-solvency"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-2-book-value/", "id": "YJBqGM29_64", "title": "Bailout 2: Book value", "kind": "Video", "description": "Hypothetical bank balance sheet. What book value means.", "slug": "bailout-2-book-value"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-3-book-value-vs-market-value/", "id": "TUOQZjotyAQ", "title": "Bailout 3: Book value vs. market value", "kind": "Video", "description": "What it means when the market value of a stock is different from its book value.", "slug": "bailout-3-book-value-vs-market-value"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-4-mark-to-model-vs-mark-to-market/", "id": "w_GZqhAR0I4", "title": "Bailout 4: Mark-to-model vs. mark-to-market", "kind": "Video", "description": "Different ways of accounting for an asset. Mark-to-model vs. mark-to-market.", "slug": "bailout-4-mark-to-model-vs-mark-to-market"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-5-paying-off-the-debt/", "id": "I8BLj7cRM7c", "title": "Bailout 5: Paying off the debt", "kind": "Video", "description": "How the bank can liquidate assets to pay off debt that comes due.", "slug": "bailout-5-paying-off-the-debt"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-6-getting-an-equity-infusion/", "id": "jDNalKBb3aA", "title": "Bailout 6: Getting an equity infusion", "kind": "Video", "description": "The bank gets bailed out by an equity infusion from a sovereign wealth fund.", "slug": "bailout-6-getting-an-equity-infusion"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-7-bank-goes-into-bankruptcy/", "id": "MdIfefLcdoU", "title": "Bailout 7: Bank goes into bankruptcy", "kind": "Video", "description": "What happens when there is no equity infusion and the bank goes in to bankruptcy.", "slug": "bailout-7-bank-goes-into-bankruptcy"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-8-systemic-risk/", "id": "gX9aKDeAOz4", "title": "Bailout 8: Systemic risk", "kind": "Video", "description": "How the banks are connected. What happens when one bank fails.", "slug": "bailout-8-systemic-risk"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-9-paulson-s-plan/", "id": "eBYbnYNl0rw", "title": "Bailout 9: Paulson's plan", "kind": "Video", "description": "What Paulson wants to do and why I don't like it.", "slug": "bailout-9-paulson-s-plan"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-10-moral-hazard/", "id": "roap32sTgPk", "title": "Bailout 10: Moral hazard", "kind": "Video", "description": "Alternate plans and moral hazard.", "slug": "bailout-10-moral-hazard"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-11-why-these-cdos-could-be-worth-nothing/", "id": "RkIM0Mbc8YQ", "title": "Bailout 11: Why these CDOs could be worth nothing", "kind": "Video", "description": "Why a CDO could be worth nothing even though they are \"collateralized\".", "slug": "bailout-11-why-these-cdos-could-be-worth-nothing"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-12-lone-star-transaction/", "id": "eZZkhSl8lMA", "title": "Bailout 12: Lone Star transaction", "kind": "Video", "description": "A real life example of a transaction involving CDOs.", "slug": "bailout-12-lone-star-transaction"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-13-does-the-bailout-have-a-chance-of-working/", "id": "R528WbVdC0I", "title": "Bailout 13: Does the bailout have a chance of working?", "kind": "Video", "description": "Can the bailout work?", "slug": "bailout-13-does-the-bailout-have-a-chance-of-working"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-14-possible-solution/", "id": "BdmI14oSe4g", "title": "Bailout 14: Possible solution", "kind": "Video", "description": "A solution that is MUCH fairer that has a MUCH better chance of working!", "slug": "bailout-14-possible-solution"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/bailout-15-more-on-the-solution/", "id": "-KrSxA9NCf0", "title": "Bailout 15: More on the solution", "kind": "Video", "description": "More on the \"Plutsky Plan\".", "slug": "bailout-15-more-on-the-solution"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/bank-bailout/cnn-understanding-the-crisis/", "id": "_ZAlj2gu0eM", "title": "CNN: Understanding the crisis", "kind": "Video", "description": "Video of Sal on CNN on October 10th discussing the credit crisis and a potential solution to it.", "slug": "cnn-understanding-the-crisis"}], "in_knowledge_map": false, "description": "In 2008, the entire financial system was at a potential breaking point because of a popping housing bubble. This tutorial breaks down how the government attempted to address this (historical note: Sal made these videos as the crisis was unfolding).", "node_slug": "bank-bailout", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/money-and-banking/bank-bailout", "extended_slug": "economics-finance-domain/core-finance/money-and-banking/bank-bailout", "kind": "Topic", "slug": "bank-bailout"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/", "id": "geithner-plan", "hide": false, "title": "Geithner plan", "child_data": [{"kind": "Video", "id": "424002"}, {"kind": "Video", "id": "421004"}, {"kind": "Video", "id": "392045"}, {"kind": "Video", "id": "423003"}, {"kind": "Video", "id": "410032"}, {"kind": "Video", "id": "417003"}], "children": [{"path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/geithner-plan-i/", "id": "ervHbKa7R5g", "title": "Geithner plan 1", "kind": "Video", "description": "Overview of the Geithner Plan and the problem it is supposed to solve.", "slug": "geithner-plan-i"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/geithner-plan-ii/", "id": "n-arbfLTCtI", "title": "Geithner plan 2", "kind": "Video", "description": "More on the Geithner Plan. The problem of banks buying the assets from themselves.", "slug": "geithner-plan-ii"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/geithner-plan-2-5/", "id": "0FxRYePmogU", "title": "Geithner plan 3", "kind": "Video", "description": "More exotic ways that a bank could buy transfer exposure to the taxpayer.", "slug": "geithner-plan-2-5"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/geithner-plan-iii/", "id": "_ka1HZS-Egc", "title": "Geithner plan 4", "kind": "Video", "description": "Constructing an investment where an investor gets the same upside while the program limits the downside.", "slug": "geithner-plan-iii"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/geithner-plan-iv/", "id": "ajl1UdtYUCA", "title": "Geithner plan 5", "kind": "Video", "description": "Quantifying the value of the put option", "slug": "geithner-plan-iv"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/geithner-plan/geithner-5-a-better-solution/", "id": "kpqSeXpiM6k", "title": "Geithner plan 6: A better solution", "kind": "Video", "description": "A better way to solve the \"liquidity\" and \"price discovery\" problem.", "slug": "geithner-5-a-better-solution"}], "in_knowledge_map": false, "description": "The poop really started to hit the fan in the fall of 2008. When the new administration took office in early 2009, the poop was still there. This is tutorial explains an attempt--probably not a well thought out one--to clean the poop and slow the fan.\n\nVideos on the Geithner Plan to solve the continuing banking crisis in early 2009.", "node_slug": "geithner-plan", "render_type": "UncuratedTutorial", "topic_page_url": "/economics-finance-domain/core-finance/money-and-banking/geithner-plan", "extended_slug": "economics-finance-domain/core-finance/money-and-banking/geithner-plan", "kind": "Topic", "slug": "geithner-plan"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/", "id": "currency-tutorial", "hide": false, "title": "Foreign exchange and trade", "child_data": [{"kind": "Video", "id": "6022735"}, {"kind": "Video", "id": "6022736"}, {"kind": "Video", "id": "6022737"}, {"kind": "Video", "id": "6022738"}, {"kind": "Video", "id": "6022739"}, {"kind": "Video", "id": "6022740"}, {"kind": "Video", "id": "6022741"}, {"kind": "Video", "id": "42120198"}, {"kind": "Video", "id": "215390220"}], "children": [{"path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/currency-exchange-introduction/", "id": "itoNb1lb5hY", "title": "Currency exchange introduction", "kind": "Video", "description": "Introduction to how exchange rates can fluctuate", "slug": "currency-exchange-introduction"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/currency-effect-on-trade/", "id": "5HVCFrXQ9pw", "title": "Currency effect on trade", "kind": "Video", "description": "Currency Effect on Trade", "slug": "currency-effect-on-trade"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/currency-effect-on-trade-review/", "id": "Ysk1ySejuCQ", "title": "Currency effect on trade review", "kind": "Video", "description": "Currency Effect on Trade Review", "slug": "currency-effect-on-trade-review"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/pegging-the-yuan/", "id": "S-9iY1OgbDE", "title": "Pegging the yuan", "kind": "Video", "description": "How the Chinese Central Bank could peg the Yuan to the dollar by printing Yuan and buying dollars (building up a dollar reserve)", "slug": "pegging-the-yuan"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/chinese-central-bank-buying-treasuries/", "id": "MN4SWiEEqKo", "title": "Chinese Central Bank buying treasuries", "kind": "Video", "description": "Chinese Central Bank Buying Treasuries", "slug": "chinese-central-bank-buying-treasuries"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/american-chinese-debt-loop/", "id": "m5xu4r0szaA", "title": "American-Chinese debt loop", "kind": "Video", "description": "How the Chinese buying of American debt leads to lower interest rates", "slug": "american-chinese-debt-loop"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/debt-loops-rationale-and-effects/", "id": "XBI7DqttyOQ", "title": "Debt loops rationale and effects", "kind": "Video", "description": "Positive and negative effects of China's devaluing of their currency", "slug": "debt-loops-rationale-and-effects"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/china-keeps-peg-but-diversifies-holdings/", "id": "4aNoZjAhSr8", "title": "China keeps peg but diversifies holdings", "kind": "Video", "description": "China keeps peg but diversifies holdings", "slug": "china-keeps-peg-but-diversifies-holdings"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/currency-tutorial/carry-trade-basics/", "id": "8In5PK1yUAA", "title": "Carry trade basics", "kind": "Video", "description": "The mechanics of the carry trade", "slug": "carry-trade-basics"}], "in_knowledge_map": false, "description": "This tutorial walks through how China's undervaluing of its currency impacts trade and prices (which also fuels cheap borrowing for the U.S.).", "node_slug": "currency-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/money-and-banking/currency-tutorial", "extended_slug": "economics-finance-domain/core-finance/money-and-banking/currency-tutorial", "kind": "Topic", "slug": "currency-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/", "id": "china-us-debt-situation", "hide": false, "title": "Chinese currency and U.S. debt", "child_data": [{"kind": "Video", "id": "42110725"}, {"kind": "Video", "id": "42110726"}, {"kind": "Video", "id": "42110727"}, {"kind": "Video", "id": "42110728"}, {"kind": "Video", "id": "42110729"}, {"kind": "Video", "id": "42110730"}, {"kind": "Video", "id": "42110731"}, {"kind": "Video", "id": "42110732"}, {"kind": "Video", "id": "42110733"}, {"kind": "Video", "id": "42110734"}], "children": [{"path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/floating-exchange-resolving-trade-imbalance/", "id": "wNYFJsC8TZE", "title": "Floating exchange resolving trade imbalance", "kind": "Video", "description": "Floating Exchange Resolving Trade Imbalance", "slug": "floating-exchange-resolving-trade-imbalance"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/china-pegs-to-dollar-to-keep-trade-imbalance/", "id": "uTlh861MtYk", "title": "China pegs to dollar to keep trade imbalance", "kind": "Video", "description": "China Pegs to Dollar to Keep Trade Imbalance", "slug": "china-pegs-to-dollar-to-keep-trade-imbalance"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/china-buys-us-bonds/", "id": "Dfkq9SOWxY8", "title": "China buys US bonds", "kind": "Video", "description": "China buys US Bonds", "slug": "china-buys-us-bonds"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/review-of-china-us-currency-situation/", "id": "DtlFQ_nNaQM", "title": "Review of China US currency situation", "kind": "Video", "description": "Review of China US currency situation", "slug": "review-of-china-us-currency-situation"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/data-on-chinese-m1-increase-in-2010/", "id": "4Azskeheo_g", "title": "Data on Chinese M1 increase in 2010", "kind": "Video", "description": "Data on Chinese M1 Increase in 2010", "slug": "data-on-chinese-m1-increase-in-2010"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/data-on-chinese-foreign-assets-increase-in-2010/", "id": "a3NFAnHxpKw", "title": "Data on Chinese foreign assets increase in 2010", "kind": "Video", "description": "Data on Chinese Foreign Assets Increase in 2010", "slug": "data-on-chinese-foreign-assets-increase-in-2010"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/data-on-chinese-us-balance-of-payments/", "id": "iNemmT1hnzA", "title": "Data on Chinese US balance of payments", "kind": "Video", "description": "Data on Chinese US Balance of Payments", "slug": "data-on-chinese-us-balance-of-payments"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/chinese-inflation/", "id": "R_-V6usZJsc", "title": "Chinese inflation", "kind": "Video", "description": "Chinese inflation", "slug": "chinese-inflation"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/floating-exchange-effect-on-china/", "id": "vrGNXAGmfCM", "title": "Floating exchange effect on China", "kind": "Video", "description": "Floating Exchange Effect on China", "slug": "floating-exchange-effect-on-china"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation/floating-exchange-effect-on-us/", "id": "K0GF4FT51qY", "title": "Floating exchange effect on US", "kind": "Video", "description": "Floating Exchange Effect on US", "slug": "floating-exchange-effect-on-us"}], "in_knowledge_map": false, "description": "This tutorial contains short videos that explain how China and the United States are intertwined through currency and debt. This is key for understanding the current global macro picture.", "node_slug": "china-us-debt-situation", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation", "extended_slug": "economics-finance-domain/core-finance/money-and-banking/china-us-debt-situation", "kind": "Topic", "slug": "china-us-debt-situation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/money-and-banking/greek-debt-crisis/", "id": "greek-debt-crisis", "hide": false, "title": "2011-2012 Greek debt crisis", "child_data": [{"kind": "Video", "id": "796502981"}, {"kind": "Video", "id": "796434657"}, {"kind": "Video", "id": "796307891"}, {"kind": "Video", "id": "796535894"}], "children": [{"path": "khan/economics-finance-domain/core-finance/money-and-banking/greek-debt-crisis/greek-debt-recession-and-austerity-part-1/", "id": "9p10aMu1Glo", "title": "Greek debt recession and austerity (part 1)", "kind": "Video", "description": "A primer of why Greece is in a tough situation (more in future videos)", "slug": "greek-debt-recession-and-austerity-part-1"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/greek-debt-crisis/greek-financial-crisis-part-2/", "id": "CkNArgNPI2Y", "title": "Greek financial crisis (part 2)", "kind": "Video", "description": "What Greece could have done if it had its own currency", "slug": "greek-financial-crisis-part-2"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/greek-debt-crisis/how-and-why-greece-would-leave-the-euro-part-3/", "id": "jkmwAJMERrY", "title": "How and why Greece would leave the Euro (part 3)", "kind": "Video", "description": "The pain and mechanics of leaving the Euro", "slug": "how-and-why-greece-would-leave-the-euro-part-3"}, {"path": "khan/economics-finance-domain/core-finance/money-and-banking/greek-debt-crisis/why-europe-is-worried-about-greece/", "id": "xc-TSAQkqJ0", "title": "Why Europe is worried about Greece", "kind": "Video", "description": "Why the Greek situation is scary for Europe as a whole", "slug": "why-europe-is-worried-about-greece"}], "in_knowledge_map": false, "description": "The Greek government incurred debt beyond its means but didn't have control over its own currency to inflate away its obligations. From austerity, to a bailout, to leaving the Eurozone, none of the options looked great.\n\nIn this tutorial, Sal walks through the situation Greece was in and its options (these videos were made as the crisis was unfolding).", "node_slug": "greek-debt-crisis", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/money-and-banking/greek-debt-crisis", "extended_slug": "economics-finance-domain/core-finance/money-and-banking/greek-debt-crisis", "kind": "Topic", "slug": "greek-debt-crisis"}], "in_knowledge_map": false, "description": "", "node_slug": "money-and-banking", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/core-finance/money-and-banking", "extended_slug": "economics-finance-domain/core-finance/money-and-banking", "kind": "Topic", "slug": "money-and-banking"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/core-finance/derivative-securities/", "id": "derivative-securities", "hide": false, "title": "Options, swaps, futures, MBSs, CDOs, and other derivatives", "child_data": [{"kind": "Topic", "id": "x4b8bece8"}, {"kind": "Topic", "id": "x46adaf10"}, {"kind": "Topic", "id": "x73ebd180"}, {"kind": "Topic", "id": "x5ae115fd"}, {"kind": "Topic", "id": "xd4469d9c"}, {"kind": "Topic", "id": "x1c4a4d06"}, {"kind": "Topic", "id": "x4ab674dd"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/", "id": "put-call-options", "hide": false, "title": "Put and call options", "child_data": [{"kind": "Video", "id": "33794224"}, {"kind": "Video", "id": "33794225"}, {"kind": "Video", "id": "33794226"}, {"kind": "Video", "id": "33794227"}, {"kind": "Video", "id": "33794228"}, {"kind": "Video", "id": "33794229"}, {"kind": "Video", "id": "33794230"}, {"kind": "Video", "id": "33794232"}, {"kind": "Video", "id": "33794233"}, {"kind": "Video", "id": "33794231"}, {"kind": "Video", "id": "33794234"}, {"kind": "Video", "id": "33794235"}, {"kind": "Video", "id": "42120202"}, {"kind": "Video", "id": "33794236"}, {"kind": "Video", "id": "33794237"}, {"kind": "Video", "id": "42120203"}, {"kind": "Video", "id": "42120204"}, {"kind": "Video", "id": "42127149"}], "children": [{"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/american-call-options/", "id": "nnl3x1wo25g", "title": "American call options", "kind": "Video", "description": "American Call Options", "slug": "american-call-options"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/basic-shorting/", "id": "jAOtWm_WZiE", "title": "Basic shorting", "kind": "Video", "description": "Basic Shorting", "slug": "basic-shorting"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/american-put-options/", "id": "6CUcgUeQS-w", "title": "American put options", "kind": "Video", "description": "American Put Options", "slug": "american-put-options"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/call-option-as-leverage/", "id": "N8h45mDI80s", "title": "Call option as leverage", "kind": "Video", "description": "Call Option as Leverage", "slug": "call-option-as-leverage"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-vs-short-and-leverage/", "id": "_q25hz5xLdk", "title": "Put vs. short and leverage", "kind": "Video", "description": "Put vs. Short and Leverage", "slug": "put-vs-short-and-leverage"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/call-payoff-diagram/", "id": "MZQxeQYQCUg", "title": "Call payoff diagram", "kind": "Video", "description": "Call Payoff Diagram", "slug": "call-payoff-diagram"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-payoff-diagram/", "id": "VST_U297pH0", "title": "Put payoff diagram", "kind": "Video", "description": "Put Payoff Diagram", "slug": "put-payoff-diagram"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-as-insurance/", "id": "i65NIcnHS9Y", "title": "Put as insurance", "kind": "Video", "description": "Put as Insurance", "slug": "put-as-insurance"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-call-parity/", "id": "m4mrd7sHCPM", "title": "Put-call parity", "kind": "Video", "description": "Put-Call Parity", "slug": "put-call-parity"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/long-straddle/", "id": "2HIRaOQDRho", "title": "Long straddle", "kind": "Video", "description": "Long Straddle", "slug": "long-straddle"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-writer-payoff-diagrams/", "id": "WFuLVSz6n8M", "title": "Put writer payoff diagrams", "kind": "Video", "description": "Put Writer Payoff Diagrams", "slug": "put-writer-payoff-diagrams"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/call-writer-payoff-diagram/", "id": "TdW3LdN5SJw", "title": "Call writer payoff diagram", "kind": "Video", "description": "Call Writer Payoff Diagram", "slug": "call-writer-payoff-diagram"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/arbitrage-basics/", "id": "AuCH7fHZsZ4", "title": "Arbitrage basics", "kind": "Video", "description": "Arbitrage Basics", "slug": "arbitrage-basics"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-call-parity-arbitrage-i/", "id": "SCM4A0rBeOQ", "title": "Put-call parity arbitrage I", "kind": "Video", "description": "Put-Call Parity Arbitrage I", "slug": "put-call-parity-arbitrage-i"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-call-parity-arbitrage-ii/", "id": "MHWmBggmIU0", "title": "Put-call parity arbitrage II", "kind": "Video", "description": "Put-Call Parity Arbitrage II", "slug": "put-call-parity-arbitrage-ii"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/put-call-parity-clarification/", "id": "Sc6zc8KR_NU", "title": "Put-call parity clarification", "kind": "Video", "description": "Put-Call Parity Clarification", "slug": "put-call-parity-clarification"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/actual-option-quotes/", "id": "3o82OwR78wU", "title": "Actual option quotes", "kind": "Video", "description": "Actual Option Quotes", "slug": "actual-option-quotes"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/put-call-options/option-expiration-and-price/", "id": "OrRDNKNHtlg", "title": "Option expiration and price", "kind": "Video", "description": "Option Expiration and Price", "slug": "option-expiration-and-price"}], "in_knowledge_map": false, "description": "Options allow investors and speculators to hedge downside (or upside). It allows them to trade on a belief that prices will change a lot--just not clear about direction. It allows them to benefit in any market (with leverage) if they speculate correctly.\n\nThis tutorial walks through option basics and even goes into some fairly sophisticated option mechanics.", "node_slug": "put-call-options", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/derivative-securities/put-call-options", "extended_slug": "economics-finance-domain/core-finance/derivative-securities/put-call-options", "kind": "Topic", "slug": "put-call-options"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/", "id": "forward-futures-contracts", "hide": false, "title": "Forward and futures contracts", "child_data": [{"kind": "Video", "id": "42127150"}, {"kind": "Video", "id": "42127151"}, {"kind": "Video", "id": "42127152"}, {"kind": "Video", "id": "42127153"}, {"kind": "Video", "id": "42127156"}, {"kind": "Video", "id": "47066532"}, {"kind": "Video", "id": "109588135"}, {"kind": "Video", "id": "109588136"}, {"kind": "Video", "id": "108263160"}, {"kind": "Video", "id": "47066533"}, {"kind": "Video", "id": "47066534"}, {"kind": "Video", "id": "47066535"}, {"kind": "Video", "id": "47066536"}, {"kind": "Video", "id": "47066537"}, {"kind": "Video", "id": "47066538"}, {"kind": "Video", "id": "42127154"}, {"kind": "Video", "id": "42127155"}, {"kind": "Video", "id": "163511020"}, {"kind": "Video", "id": "252117773"}], "children": [{"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/forward-contract-introduction/", "id": "H9UEZdAnnt8", "title": "Forward contract introduction", "kind": "Video", "description": "Forward Contract Introduction", "slug": "forward-contract-introduction"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/futures-introduction/", "id": "3g6P0lRXotI", "title": "Futures introduction", "kind": "Video", "description": "Futures Introduction", "slug": "futures-introduction"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/motivation-for-the-futures-exchange/", "id": "iyrOGvbSS2U", "title": "Motivation for the futures exchange", "kind": "Video", "description": "How an exchange can benefit from trading futures and how it can use margin to mitigate its risk", "slug": "motivation-for-the-futures-exchange"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/futures-margin-mechanics/", "id": "1t42z5U2uoc", "title": "Futures margin mechanics", "kind": "Video", "description": "Understanding the mechanics of margin for futures. Initial and maintenance margin", "slug": "futures-margin-mechanics"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/verifying-hedge-with-futures-margin-mechanics/", "id": "1mnKCkmeaYs", "title": "Verifying hedge with futures margin mechanics", "kind": "Video", "description": "Verifying Hedge with Futures Margin Mechanics", "slug": "verifying-hedge-with-futures-margin-mechanics"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/futures-and-forward-curves/", "id": "AnATlMVA12E", "title": "Futures and forward curves", "kind": "Video", "description": "Normal and Inverted Futures Curves", "slug": "futures-and-forward-curves"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/contango-from-trader-perspective/", "id": "C3KlN5kTWAs", "title": "Contango from trader perspective", "kind": "Video", "description": "What a trader means when they say that a market is in contango", "slug": "contango-from-trader-perspective"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/severe-contango-generally-bearish/", "id": "hYzN0w8FatU", "title": "Severe contango generally bearish", "kind": "Video", "description": "Thinking about why a severe contango could be bearish", "slug": "severe-contango-generally-bearish"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/backwardation-bullish-or-bearish/", "id": "1CxRVVGGNJU", "title": "Backwardation bullish or bearish", "kind": "Video", "description": "Thinking about why backwardation in commodities markets is bullish", "slug": "backwardation-bullish-or-bearish"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/futures-curves-ii/", "id": "UDe6zeabyQM", "title": "Futures curves II", "kind": "Video", "description": "Futures Curves II", "slug": "futures-curves-ii"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/contango/", "id": "wSqkieBUuo8", "title": "Contango", "kind": "Video", "slug": "contango"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/backwardation/", "id": "LDuJ1AD7n54", "title": "Backwardation", "kind": "Video", "description": "Backwardation and the theory of Normal Backwardation", "slug": "backwardation"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/contango-and-backwardation-review/", "id": "5YaSL-y46Hk", "title": "Contango and backwardation review", "kind": "Video", "description": "Review of the difference uses of the words contango, backwardation, contango theory and theory of normal backwardation", "slug": "contango-and-backwardation-review"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/upper-bound-on-forward-settlement-price/", "id": "FcRxdq7KGOQ", "title": "Upper bound on forward settlement price", "kind": "Video", "description": "Upper Bound on Forward Settlement Price", "slug": "upper-bound-on-forward-settlement-price"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/lower-bound-on-forward-settlement-price/", "id": "_uDb0ZdGb8w", "title": "Lower bound on forward settlement price", "kind": "Video", "description": "Lower Bound on Forward Settlement Price", "slug": "lower-bound-on-forward-settlement-price"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/arbitraging-futures-contract/", "id": "0jk6uLZ1Tdc", "title": "Arbitraging futures contract", "kind": "Video", "slug": "arbitraging-futures-contract"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/arbitraging-futures-contracts-ii/", "id": "5kFnAmmGXM4", "title": "Arbitraging futures contracts II", "kind": "Video", "description": "Arbitraging Futures Contracts II", "slug": "arbitraging-futures-contracts-ii"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/futures-fair-value-in-the-pre-market/", "id": "QiluvhVryI0", "title": "Futures fair value in the pre-market", "kind": "Video", "description": "What is the Futures Fair Value and how to traders use it as an indicator for stock price direction at market opening", "slug": "futures-fair-value-in-the-pre-market"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/interpretting-futures-fair-value-in-the-premarket/", "id": "owcmu4XxrHM", "title": "Interpreting futures fair value in the premarket", "kind": "Video", "description": "How to interpret the market price of a futures contract relative to the fair value in the premarket", "slug": "interpretting-futures-fair-value-in-the-premarket"}], "in_knowledge_map": false, "description": "In many commodities markets, it is very helpful for buyers or sellers to lock-in future prices. This is what both forwards and futures allow for. This tutorial explains how they work and what the difference is between the two.", "node_slug": "forward-futures-contracts", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts", "extended_slug": "economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts", "kind": "Topic", "slug": "forward-futures-contracts"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/derivative-securities/mort-backed-secs-tut/", "id": "mort-backed-secs-tut", "hide": false, "title": "Mortgage-backed securities", "child_data": [{"kind": "Video", "id": "163483626"}, {"kind": "Video", "id": "24670"}, {"kind": "Video", "id": "24672"}, {"kind": "Video", "id": "24674"}], "children": [{"path": "khan/economics-finance-domain/core-finance/derivative-securities/mort-backed-secs-tut/mortgage-back-security-overview/", "id": "dwleadLC2Dw", "title": "Mortgage-backed security overview", "kind": "Video", "description": "Basics of how a mortgage back security works", "slug": "mortgage-back-security-overview"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/mort-backed-secs-tut/mortgage-backed-securities-i/", "id": "oosYQHq2hwE", "title": "Mortgage-backed securities I", "kind": "Video", "description": "Part I of the introduction to mortgage-backed securities", "slug": "mortgage-backed-securities-i"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/mort-backed-secs-tut/mortgage-backed-securities-ii/", "id": "eYBlfxGIk28", "title": "Mortgage-backed securities II", "kind": "Video", "description": "Part II of the introduction to mortgage-backed securities", "slug": "mortgage-backed-securities-ii"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/mort-backed-secs-tut/mortgage-backed-securities-iii/", "id": "q0oSKmC3Mfc", "title": "Mortgage-backed securities III", "kind": "Video", "description": "More on mortgage-backed securities", "slug": "mortgage-backed-securities-iii"}], "in_knowledge_map": false, "description": "What started out as a creative way to spread risk ended up fueling a monster housing bubble. This tutorial explains what mortgage-backed securities are and how they work.", "node_slug": "mort-backed-secs-tut", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/derivative-securities/mort-backed-secs-tut", "extended_slug": "economics-finance-domain/core-finance/derivative-securities/mort-backed-secs-tut", "kind": "Topic", "slug": "mort-backed-secs-tut"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/derivative-securities/cdo-tutorial/", "id": "CDO-tutorial", "hide": false, "title": "Collateralized debt obligations", "child_data": [{"kind": "Video", "id": "163483625"}, {"kind": "Video", "id": "24676"}], "children": [{"path": "khan/economics-finance-domain/core-finance/derivative-securities/cdo-tutorial/collateralized-debt-obligation-overview/", "id": "TEfyIsDRGCk", "title": "Collateralized debt obligation overview", "kind": "Video", "description": "How CDOs can give different investors different levels of risk and returns with the same underlying assets", "slug": "collateralized-debt-obligation-overview"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/cdo-tutorial/collateralized-debt-obligation-cdo/", "id": "XjoJ9UF2hqg", "title": "Collateralized debt obligation (CDO)", "kind": "Video", "description": "Introduction to collateralized debt obligations (to be listen to after series on mortgage-backed securities.", "slug": "collateralized-debt-obligation-cdo"}], "in_knowledge_map": false, "description": "", "node_slug": "CDO-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/derivative-securities/CDO-tutorial", "extended_slug": "economics-finance-domain/core-finance/derivative-securities/CDO-tutorial", "kind": "Topic", "slug": "cdo-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/derivative-securities/credit-default-swaps-tut/", "id": "credit-default-swaps-tut", "hide": false, "title": "Credit default swaps", "child_data": [{"kind": "Video", "id": "163483627"}, {"kind": "Video", "id": "24680"}, {"kind": "Video", "id": "24682"}, {"kind": "Video", "id": "167407348"}, {"kind": "Video", "id": "167407359"}], "children": [{"path": "khan/economics-finance-domain/core-finance/derivative-securities/credit-default-swaps-tut/credit-default-swaps-cds-intro/", "id": "ccaCl1GKdJ0", "title": "Credit default swaps (CDS) intro", "kind": "Video", "description": "Introduction to credit default swaps and why they can be dangerous", "slug": "credit-default-swaps-cds-intro"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/credit-default-swaps-tut/credit-default-swaps/", "id": "a1lVOO9Y080", "title": "Credit default swaps", "kind": "Video", "description": "Introduction to credit default swaps", "slug": "credit-default-swaps"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/credit-default-swaps-tut/credit-default-swaps-2/", "id": "neAFEvNsiqw", "title": "Credit default swaps 2", "kind": "Video", "description": "Systemic risks of credit default swaps. Financial weapons of mass destruction.", "slug": "credit-default-swaps-2"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/credit-default-swaps-tut/use-cases-for-credit-default-swaps/", "id": "ewSw9tF9Z0E", "title": "Use cases for credit default swaps", "kind": "Video", "description": "How credit default swaps can be used as hedges, insurance or side-bets", "slug": "use-cases-for-credit-default-swaps"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/credit-default-swaps-tut/financial-weapons-of-mass-destruction/", "id": "MNUVuZu6heA", "title": "Financial weapons of mass destruction", "kind": "Video", "description": "Why Warren Buffett called Credit Default Swaps financial weapons of mass destruction", "slug": "financial-weapons-of-mass-destruction"}], "in_knowledge_map": false, "description": "", "node_slug": "credit-default-swaps-tut", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/derivative-securities/credit-default-swaps-tut", "extended_slug": "economics-finance-domain/core-finance/derivative-securities/credit-default-swaps-tut", "kind": "Topic", "slug": "credit-default-swaps-tut"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/derivative-securities/interest-rate-swaps-tut/", "id": "interest-rate-swaps-tut", "hide": false, "title": "Interest rate swaps", "child_data": [{"kind": "Video", "id": "252117772"}, {"kind": "Video", "id": "252117774"}], "children": [{"path": "khan/economics-finance-domain/core-finance/derivative-securities/interest-rate-swaps-tut/interest-rate-swap-1/", "id": "PLjyj1FJqig", "title": "Interest rate swap 1", "kind": "Video", "description": "The basic dynamic of an interest rate swap", "slug": "interest-rate-swap-1"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/interest-rate-swaps-tut/interest-rate-swap-2/", "id": "xE43JrjCpjE", "title": "Interest rate swap 2", "kind": "Video", "slug": "interest-rate-swap-2"}], "in_knowledge_map": false, "description": "", "node_slug": "interest-rate-swaps-tut", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/derivative-securities/interest-rate-swaps-tut", "extended_slug": "economics-finance-domain/core-finance/derivative-securities/interest-rate-swaps-tut", "kind": "Topic", "slug": "interest-rate-swaps-tut"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/derivative-securities/black-scholes/", "id": "Black-Scholes", "hide": false, "title": "Black-Scholes formula", "child_data": [{"kind": "Video", "id": "x0a8d6036"}, {"kind": "Video", "id": "xdf41071e"}], "children": [{"path": "khan/economics-finance-domain/core-finance/derivative-securities/black-scholes/introduction-to-the-black-scholes-formula/", "id": "pr-u4LCFYEY", "title": "Introduction to the Black-Scholes formula", "kind": "Video", "slug": "introduction-to-the-black-scholes-formula"}, {"path": "khan/economics-finance-domain/core-finance/derivative-securities/black-scholes/implied-volatility/", "id": "VIHldsSmASU", "title": "Implied volatility", "kind": "Video", "slug": "implied-volatility"}], "in_knowledge_map": false, "description": "Options have been bought and sold for ages, but finding a rational way to price them seemed beyond our mathematical know-how... until 1973 when Fischer Black and Myron Scholes showed up and gave us the Black-Scholes model. This work was later extended by Robert Merton and now underpins much of modern finance.", "node_slug": "Black-Scholes", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/derivative-securities/Black-Scholes", "extended_slug": "economics-finance-domain/core-finance/derivative-securities/Black-Scholes", "kind": "Topic", "slug": "black-scholes"}], "in_knowledge_map": false, "description": "", "node_slug": "derivative-securities", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/core-finance/derivative-securities", "extended_slug": "economics-finance-domain/core-finance/derivative-securities", "kind": "Topic", "slug": "derivative-securities"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/core-finance/current-economics/", "id": "current-economics", "hide": false, "title": "Current economics", "child_data": [{"kind": "Topic", "id": "x883327c1"}, {"kind": "Topic", "id": "x6782aa14"}, {"kind": "Topic", "id": "x12c2263b"}, {"kind": "Topic", "id": "xb0762ad5"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/current-economics/unemployment-tutorial/", "id": "unemployment-tutorial", "hide": false, "title": "Unemployment", "child_data": [{"kind": "Video", "id": "359055"}, {"kind": "Video", "id": "184517738"}, {"kind": "Video", "id": "421005"}, {"kind": "Video", "id": "375064"}], "children": [{"path": "khan/economics-finance-domain/core-finance/current-economics/unemployment-tutorial/unemployment/", "id": "vUOiOi-XaoQ", "title": "Unemployment", "kind": "Video", "description": "Analyzing unemployment data to show that \"real\" unemployment is worse than the headline numbers show.", "slug": "unemployment"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/unemployment-tutorial/unemployment-rate-primer-v2/", "id": "C9onjpQGpSg", "title": "Unemployment rate primer (v2)", "kind": "Video", "description": "How the unemployment rate is calculated", "slug": "unemployment-rate-primer-v2"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/unemployment-tutorial/unemployment-rate-primer/", "id": "9DGbDx5xQNo", "title": "Unemployment rate primer", "kind": "Video", "description": "Understanding how the headline unemployment rate (U-3) is calculated", "slug": "unemployment-rate-primer"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/unemployment-tutorial/simple-analysis-of-cost-per-job-saved-from-stimulus/", "id": "sSqxVMbml_k", "title": "Simple analysis of cost per job saved from stimulus", "kind": "Video", "description": "Simple analysis of cost per job saved from stimulus", "slug": "simple-analysis-of-cost-per-job-saved-from-stimulus"}], "in_knowledge_map": false, "description": "Unemployment is a key metric for judging the health of an economy (and even political stability). This tutorial is a primer on what it is and how it's measured (which you might find surprising).", "node_slug": "unemployment-tutorial", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/current-economics/unemployment-tutorial", "extended_slug": "economics-finance-domain/core-finance/current-economics/unemployment-tutorial", "kind": "Topic", "slug": "unemployment-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/current-economics/housing-price-conundrum/", "id": "housing-price-conundrum", "hide": false, "title": "Housing price conundrum", "child_data": [{"kind": "Video", "id": "24662"}, {"kind": "Video", "id": "24664"}, {"kind": "Video", "id": "24666"}, {"kind": "Video", "id": "24668"}], "children": [{"path": "khan/economics-finance-domain/core-finance/current-economics/housing-price-conundrum/the-housing-price-conundrum/", "id": "8IR5LefXVPY", "title": "The housing price conundrum", "kind": "Video", "description": "Why did housing prices go up so much from 2000-2006 even though classical supply/demand would not have called for it", "slug": "the-housing-price-conundrum"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/housing-price-conundrum/housing-price-conundrum-part-2/", "id": "wYAhlTHIBT4", "title": "Housing price conundrum (part 2)", "kind": "Video", "description": "How lower lending standards led to housing price inflation.", "slug": "housing-price-conundrum-part-2"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/housing-price-conundrum/housing-price-conundrum-part-3/", "id": "aAfMps_VyOY", "title": "Housing price conundrum (part 3)", "kind": "Video", "description": "Why did lending standards become more and more lax from 2000 to 2006?", "slug": "housing-price-conundrum-part-3"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/housing-price-conundrum/housing-conundrum-part-4/", "id": "s6UYa2nwaDw", "title": "Housing conundrum (part 4)", "kind": "Video", "description": "The virtuous circle of housing price appreciation making defaults go down making lending lax making housing appreciate even more", "slug": "housing-conundrum-part-4"}], "in_knowledge_map": false, "description": "Back before the 2008 credit crisis, Sal was perplexed by why housing prices were going up so fast and theorized that it was a bubble forming (he was right). \n\nThese pre-2008 videos are fun from a historical point-of-view since they were made before all the poo poo hit the fan.", "node_slug": "housing-price-conundrum", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/core-finance/current-economics/housing-price-conundrum", "extended_slug": "economics-finance-domain/core-finance/current-economics/housing-price-conundrum", "kind": "Topic", "slug": "housing-price-conundrum"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/", "id": "credit-crisis", "hide": false, "title": "Credit crisis", "child_data": [{"kind": "Video", "id": "24662"}, {"kind": "Video", "id": "24664"}, {"kind": "Video", "id": "24666"}, {"kind": "Video", "id": "24668"}, {"kind": "Video", "id": "24670"}, {"kind": "Video", "id": "24672"}, {"kind": "Video", "id": "24674"}, {"kind": "Video", "id": "24676"}, {"kind": "Video", "id": "24680"}, {"kind": "Video", "id": "24682"}, {"kind": "Video", "id": "24684"}, {"kind": "Video", "id": "24686"}], "children": [{"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/the-housing-price-conundrum/", "id": "8IR5LefXVPY", "title": "The housing price conundrum", "kind": "Video", "description": "Why did housing prices go up so much from 2000-2006 even though classical supply/demand would not have called for it", "slug": "the-housing-price-conundrum"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/housing-price-conundrum-part-2/", "id": "wYAhlTHIBT4", "title": "Housing price conundrum (part 2)", "kind": "Video", "description": "How lower lending standards led to housing price inflation.", "slug": "housing-price-conundrum-part-2"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/housing-price-conundrum-part-3/", "id": "aAfMps_VyOY", "title": "Housing price conundrum (part 3)", "kind": "Video", "description": "Why did lending standards become more and more lax from 2000 to 2006?", "slug": "housing-price-conundrum-part-3"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/housing-conundrum-part-4/", "id": "s6UYa2nwaDw", "title": "Housing conundrum (part 4)", "kind": "Video", "description": "The virtuous circle of housing price appreciation making defaults go down making lending lax making housing appreciate even more", "slug": "housing-conundrum-part-4"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/mortgage-backed-securities-i/", "id": "oosYQHq2hwE", "title": "Mortgage-backed securities I", "kind": "Video", "description": "Part I of the introduction to mortgage-backed securities", "slug": "mortgage-backed-securities-i"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/mortgage-backed-securities-ii/", "id": "eYBlfxGIk28", "title": "Mortgage-backed securities II", "kind": "Video", "description": "Part II of the introduction to mortgage-backed securities", "slug": "mortgage-backed-securities-ii"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/mortgage-backed-securities-iii/", "id": "q0oSKmC3Mfc", "title": "Mortgage-backed securities III", "kind": "Video", "description": "More on mortgage-backed securities", "slug": "mortgage-backed-securities-iii"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/collateralized-debt-obligation-cdo/", "id": "XjoJ9UF2hqg", "title": "Collateralized debt obligation (CDO)", "kind": "Video", "description": "Introduction to collateralized debt obligations (to be listen to after series on mortgage-backed securities.", "slug": "collateralized-debt-obligation-cdo"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/credit-default-swaps/", "id": "a1lVOO9Y080", "title": "Credit default swaps", "kind": "Video", "description": "Introduction to credit default swaps", "slug": "credit-default-swaps"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/credit-default-swaps-2/", "id": "neAFEvNsiqw", "title": "Credit default swaps 2", "kind": "Video", "description": "Systemic risks of credit default swaps. Financial weapons of mass destruction.", "slug": "credit-default-swaps-2"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/wealth-destruction-1/", "id": "Q7HbtnOyKMg", "title": "Wealth destruction 1", "kind": "Video", "description": "How bubbles destroy wealth.", "slug": "wealth-destruction-1"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/credit-crisis/wealth-destruction-2/", "id": "eRImmzuExyg", "title": "Wealth destruction 2", "kind": "Video", "description": "How bubbles destroy wealth.", "slug": "wealth-destruction-2"}], "in_knowledge_map": false, "description": "This tutorial talks about how the housing-bubble-induced credit crisis unfolded with a focus on the derivative securities that helped pump the bubble.", "node_slug": "credit-crisis", "render_type": "UncuratedTutorial", "topic_page_url": "/economics-finance-domain/core-finance/current-economics/credit-crisis", "extended_slug": "economics-finance-domain/core-finance/current-economics/credit-crisis", "kind": "Topic", "slug": "credit-crisis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/", "id": "paulson-bailout", "hide": false, "title": "Paulson bailout", "child_data": [{"kind": "Video", "id": "6022692"}, {"kind": "Video", "id": "24858"}, {"kind": "Video", "id": "24860"}, {"kind": "Video", "id": "24862"}, {"kind": "Video", "id": "24864"}, {"kind": "Video", "id": "24866"}, {"kind": "Video", "id": "24868"}, {"kind": "Video", "id": "24870"}, {"kind": "Video", "id": "24872"}, {"kind": "Video", "id": "24874"}, {"kind": "Video", "id": "24876"}, {"kind": "Video", "id": "24884"}, {"kind": "Video", "id": "24886"}, {"kind": "Video", "id": "24678"}, {"kind": "Video", "id": "24891"}, {"kind": "Video", "id": "24893"}], "children": [{"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/cnn-understanding-the-crisis/", "id": "_ZAlj2gu0eM", "title": "CNN: Understanding the crisis", "kind": "Video", "description": "Video of Sal on CNN on October 10th discussing the credit crisis and a potential solution to it.", "slug": "cnn-understanding-the-crisis"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-1-liquidity-vs-solvency/", "id": "ZUEjRYe7MRk", "title": "Bailout 1: Liquidity vs. solvency", "kind": "Video", "description": "Review of balance sheets. Difference between illiquidity and insolvency.", "slug": "bailout-1-liquidity-vs-solvency"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-2-book-value/", "id": "YJBqGM29_64", "title": "Bailout 2: Book value", "kind": "Video", "description": "Hypothetical bank balance sheet. What book value means.", "slug": "bailout-2-book-value"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-3-book-value-vs-market-value/", "id": "TUOQZjotyAQ", "title": "Bailout 3: Book value vs. market value", "kind": "Video", "description": "What it means when the market value of a stock is different from its book value.", "slug": "bailout-3-book-value-vs-market-value"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-4-mark-to-model-vs-mark-to-market/", "id": "w_GZqhAR0I4", "title": "Bailout 4: Mark-to-model vs. mark-to-market", "kind": "Video", "description": "Different ways of accounting for an asset. Mark-to-model vs. mark-to-market.", "slug": "bailout-4-mark-to-model-vs-mark-to-market"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-5-paying-off-the-debt/", "id": "I8BLj7cRM7c", "title": "Bailout 5: Paying off the debt", "kind": "Video", "description": "How the bank can liquidate assets to pay off debt that comes due.", "slug": "bailout-5-paying-off-the-debt"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-6-getting-an-equity-infusion/", "id": "jDNalKBb3aA", "title": "Bailout 6: Getting an equity infusion", "kind": "Video", "description": "The bank gets bailed out by an equity infusion from a sovereign wealth fund.", "slug": "bailout-6-getting-an-equity-infusion"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-7-bank-goes-into-bankruptcy/", "id": "MdIfefLcdoU", "title": "Bailout 7: Bank goes into bankruptcy", "kind": "Video", "description": "What happens when there is no equity infusion and the bank goes in to bankruptcy.", "slug": "bailout-7-bank-goes-into-bankruptcy"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-8-systemic-risk/", "id": "gX9aKDeAOz4", "title": "Bailout 8: Systemic risk", "kind": "Video", "description": "How the banks are connected. What happens when one bank fails.", "slug": "bailout-8-systemic-risk"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-9-paulson-s-plan/", "id": "eBYbnYNl0rw", "title": "Bailout 9: Paulson's plan", "kind": "Video", "description": "What Paulson wants to do and why I don't like it.", "slug": "bailout-9-paulson-s-plan"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-10-moral-hazard/", "id": "roap32sTgPk", "title": "Bailout 10: Moral hazard", "kind": "Video", "description": "Alternate plans and moral hazard.", "slug": "bailout-10-moral-hazard"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-11-why-these-cdos-could-be-worth-nothing/", "id": "RkIM0Mbc8YQ", "title": "Bailout 11: Why these CDOs could be worth nothing", "kind": "Video", "description": "Why a CDO could be worth nothing even though they are \"collateralized\".", "slug": "bailout-11-why-these-cdos-could-be-worth-nothing"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-12-lone-star-transaction/", "id": "eZZkhSl8lMA", "title": "Bailout 12: Lone Star transaction", "kind": "Video", "description": "A real life example of a transaction involving CDOs.", "slug": "bailout-12-lone-star-transaction"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-13-does-the-bailout-have-a-chance-of-working/", "id": "R528WbVdC0I", "title": "Bailout 13: Does the bailout have a chance of working?", "kind": "Video", "description": "Can the bailout work?", "slug": "bailout-13-does-the-bailout-have-a-chance-of-working"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-14-possible-solution/", "id": "BdmI14oSe4g", "title": "Bailout 14: Possible solution", "kind": "Video", "description": "A solution that is MUCH fairer that has a MUCH better chance of working!", "slug": "bailout-14-possible-solution"}, {"path": "khan/economics-finance-domain/core-finance/current-economics/paulson-bailout/bailout-15-more-on-the-solution/", "id": "-KrSxA9NCf0", "title": "Bailout 15: More on the solution", "kind": "Video", "description": "More on the \"Plutsky Plan\".", "slug": "bailout-15-more-on-the-solution"}], "in_knowledge_map": false, "description": "In the fall of 2008, it became clear that a cascade of bank failures was happening because of shoddy loans and exotic securities (both which fueled a now popping housing bubble). In an attempt to avoid a depression, the Treasury Secretary (Hank Paulson) wanted to pour $1 Trillion into the same banks that had created the mess.\n\nThis tutorial walks us through the beginnings of the mess and possible solutions. Historical note: it was created as the crisis was unfolding.", "node_slug": "paulson-bailout", "render_type": "UncuratedTutorial", "topic_page_url": "/economics-finance-domain/core-finance/current-economics/paulson-bailout", "extended_slug": "economics-finance-domain/core-finance/current-economics/paulson-bailout", "kind": "Topic", "slug": "paulson-bailout"}], "in_knowledge_map": false, "description": "Discussions of economic topics and how they relate to current events.", "node_slug": "current-economics", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/core-finance/current-economics", "extended_slug": "economics-finance-domain/core-finance/current-economics", "kind": "Topic", "slug": "current-economics"}], "in_knowledge_map": false, "description": "Videos on finance and macroeconomics", "node_slug": "core-finance", "render_type": "Subject", "topic_page_url": "/economics-finance-domain/core-finance", "extended_slug": "economics-finance-domain/core-finance", "kind": "Topic", "slug": "core-finance"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/entrepreneurship2/", "id": "entrepreneurship2", "hide": false, "title": "Entrepreneurship", "child_data": [{"kind": "Topic", "id": "x4fc8c4e3"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/", "id": "interviews-entrepreneurs", "hide": false, "title": "Interviews with entrepreneurs", "child_data": [{"kind": "Topic", "id": "x243e2ea4"}, {"kind": "Topic", "id": "xed179099"}, {"kind": "Topic", "id": "x3eacb06e"}, {"kind": "Topic", "id": "xd041ab40"}, {"kind": "Topic", "id": "x17626d21"}, {"kind": "Topic", "id": "xe27a1c73"}, {"kind": "Topic", "id": "x0949cedf"}, {"kind": "Topic", "id": "xa612ee73"}, {"kind": "Topic", "id": "xdb66ae54"}, {"kind": "Topic", "id": "x4f2bcd52"}, {"kind": "Topic", "id": "xf178d787"}, {"kind": "Topic", "id": "x2af88919"}, {"kind": "Topic", "id": "x0c8ba79f"}, {"kind": "Topic", "id": "x63e3b4c3"}, {"kind": "Topic", "id": "xae598f48"}, {"kind": "Topic", "id": "xe6767e2b"}, {"kind": "Topic", "id": "x7beb224b"}, {"kind": "Topic", "id": "x6f3659fd"}, {"kind": "Topic", "id": "x76d6f628"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/", "id": "copy-of-khan-academy-living-room-chats", "hide": false, "title": "Sal chats with entrepreneurs", "child_data": [{"kind": "Video", "id": "x6a16bad3"}, {"kind": "Video", "id": "x128cb567"}, {"kind": "Video", "id": "xfb9b39be"}, {"kind": "Video", "id": "xd76ab7e8"}, {"kind": "Video", "id": "x46cd5007"}, {"kind": "Video", "id": "x6f1cf81f"}, {"kind": "Video", "id": "xea95d959"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/elon-musk/", "id": "vDwzmJpI4io", "title": "Elon Musk - CEO of Tesla Motors and SpaceX", "kind": "Video", "slug": "elon-musk"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/reid-hoffman-founder-of-linkedin/", "id": "JULBDJx42DY", "title": "Reid Hoffman - Founder of LinkedIn", "kind": "Video", "slug": "reid-hoffman-founder-of-linkedin"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/scott-cook/", "id": "yKrp0sO3PJg", "title": "Scott Cook - Founder and Chairman of the Executive Committee, Intuit", "kind": "Video", "slug": "scott-cook"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/angela-ahrendts/", "id": "HNP0USRtkIw", "title": "Angela Ahrendts - Former CEO of Burberry", "kind": "Video", "description": "Angela Ahrendts visits\u00a0the Khan Academy office in Mountain View, CA on\u00a0April 30, 2013.", "slug": "angela-ahrendts"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/sean-osullivan/", "id": "kkpVr5eoyVE", "title": "Sean O'Sullivan - Founder of SOSventures", "kind": "Video", "slug": "sean-osullivan"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/a-conversation-with-drew-houston/", "id": "NZINmtuTSu0", "title": "Drew Houston - CEO and Founder of Dropbox", "kind": "Video", "slug": "a-conversation-with-drew-houston"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats/a-conversation-with-eric-schmidt-and-jonathan-rosenberg/", "id": "VFBXT9D00kM", "title": "A conversation with Eric Schmidt and Jonathan Rosenberg", "kind": "Video", "slug": "a-conversation-with-eric-schmidt-and-jonathan-rosenberg"}], "in_knowledge_map": false, "description": "", "node_slug": "copy-of-khan-academy-living-room-chats", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/copy-of-khan-academy-living-room-chats", "kind": "Topic", "slug": "copy-of-khan-academy-living-room-chats"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/richard-branson/", "id": "richard-branson", "hide": false, "title": "Richard Branson - Chairman of the Virgin Group", "child_data": [{"kind": "Video", "id": "xa910c963"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/richard-branson/kauffman-richard-branson/", "id": "wDdIwv7H3Sg", "title": "Richard Branson - Chairman of the Virgin Group", "kind": "Video", "description": "Richard Branson, Chairman of the Virgin Group, shares his story as a successful entrepreneur with a diverse portfolio.", "slug": "kauffman-richard-branson"}], "in_knowledge_map": false, "description": "Richard Branson, Chairman of the Virgin Group, shares his story as a successful entrepreneur with a diverse portfolio.", "node_slug": "richard-branson", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/richard-branson", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/richard-branson", "kind": "Topic", "slug": "richard-branson"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/marc-ecko/", "id": "marc-ecko", "hide": false, "title": "Marc Ecko - Founder of Ecko Unlimited", "child_data": [{"kind": "Video", "id": "xc2418d9f"}, {"kind": "Video", "id": "xa92dc9bf"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/marc-ecko/kauffman-marc-ecko1/", "id": "7uFbPec0tR4", "title": "Marc Ecko - Founder of Ecko Unlimited", "kind": "Video", "description": "Marc Ecko, Founder of Ecko Unlimited, discusses his origins as an entrepreneur and the entrepreneurial culture of Hip Hop. Describing graffiti as the extreme sport of art, Marc talks about how this form of artistic expression was his gateway to entrepreneurship and offers advice to young people.", "slug": "kauffman-marc-ecko1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/marc-ecko/kauffman-marc-ecko-2/", "id": "QNB9hnRfgdk", "title": "Marc Ecko - Failures are lessons for future success", "kind": "Video", "description": "Marc Ecko, Founder of Ecko Unlimited, tells a story about how being an entrepreneur is always a learning opportunity, and how understanding your ? failure can lead to success.", "slug": "kauffman-marc-ecko-2"}], "in_knowledge_map": false, "description": "Marc Ecko, Founder of Ecko Unlimited, discusses his origins as an entrepreneur and the entrepreneurial culture of Hip Hop. Describing graffiti as the extreme sport of art, Marc talks about how this form of artistic expression was his gateway to entrepreneurship and offers advice to young people.", "node_slug": "marc-ecko", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/marc-ecko", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/marc-ecko", "kind": "Topic", "slug": "marc-ecko"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/philip-rosedale/", "id": "philip-rosedale", "hide": false, "title": "Philip Rosedale - Founder and Chairman of Second Life", "child_data": [{"kind": "Video", "id": "x4e2b3cdc"}, {"kind": "Video", "id": "x9b5d5aea"}, {"kind": "Video", "id": "x9ccde711"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/philip-rosedale/kauffman-philip-rosedale1/", "id": "nONjtiCnbI0", "title": "Philip Rosedale - Founder of Coffee and Power", "kind": "Video", "description": "Philip Rosedale, Founder of Coffee and Power, discusses his recent venture and how a student\u2019s education today can lead to a career tomorrow.", "slug": "kauffman-philip-rosedale1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/philip-rosedale/kauffman-philip-rosedale2/", "id": "-9gl_HlsatI", "title": "Philip Rosedale - Founder and Chairman of Second Life", "kind": "Video", "description": "Philip Rosedale, Founder and Chairman of Second Life, talks about the origins of his groundbreaking virtual world, and how patience was the key to making the company profitable.", "slug": "kauffman-philip-rosedale2"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/philip-rosedale/kauffman-philip-rosedale3/", "id": "wjCRcXQ3EHg", "title": "Philip Rosedale - Evolving ideas vs. new ideas", "kind": "Video", "description": "Philip Rosedale, Founder of Coffee and Power, draws the distinction between companies that offer products distinguished by differentiation versus those that offer something fundamentally new. Philip goes on to discuss what drives him as an entrepreneur.", "slug": "kauffman-philip-rosedale3"}], "in_knowledge_map": false, "description": "Philip Rosedale, Founder of Coffee and Power, discusses his recent venture and how a student\u2019s education today can lead to a career tomorrow.", "node_slug": "philip-rosedale", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/philip-rosedale", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/philip-rosedale", "kind": "Topic", "slug": "philip-rosedale"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/zach-kaplan/", "id": "zach-kaplan", "hide": false, "title": "Zach Kaplan - CEO of Inventables", "child_data": [{"kind": "Video", "id": "x0e7cd541"}, {"kind": "Video", "id": "x107dd5dd"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/zach-kaplan/kauffman-zach-kaplan2/", "id": "jOw5_m54Bxg", "title": "Zach Kaplan - CEO of Inventables", "kind": "Video", "description": "Zach Kaplan, CEO of Inventables, talks about how his early education helped shape his entrepreneurial roots and describes how a popular movie taught him an important lesson in entrepreneurship. He then recalls the moment when he had to decide between starting a company and taking a job.", "slug": "kauffman-zach-kaplan2"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/zach-kaplan/kauffman-zach-kaplan1/", "id": "WreIjcz4X_k", "title": "Zach Kaplan - Digital manufacturing revolution", "kind": "Video", "description": "Zach Kaplan, CEO of Inventables, discusses how the revolution of digital manufacturing and desktop publishing can impact a new generation of entrepreneurs.", "slug": "kauffman-zach-kaplan1"}], "in_knowledge_map": false, "description": "Zach Kaplan, CEO of Inventables, discusses how the revolution of digital manufacturing and desktop publishing can impact a new generation of entrepreneurs.", "node_slug": "zach-kaplan", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/zach-kaplan", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/zach-kaplan", "kind": "Topic", "slug": "zach-kaplan"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ta-mccann/", "id": "ta-mccann", "hide": false, "title": "T.A. McCann - Founder and CEO of Gist", "child_data": [{"kind": "Video", "id": "x514c957c"}, {"kind": "Video", "id": "x76981c0e"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ta-mccann/kauffman-ta-mccann1/", "id": "fakiCFD41TI", "title": "T.A. McCann - Founder and CEO of Gist", "kind": "Video", "description": "T.A. McCann, Founder and CEO of Gist, talks about his entrepreneurial journey, including how he joined the America\u2019s Cup sailing team. T.A. discusses how entrepreneurs need to show initiative and chart their own course, advising other founders to always ask questions and make progress.", "slug": "kauffman-ta-mccann1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ta-mccann/kauffman-ta-mccann2/", "id": "b9XDyXiJD7U", "title": "T.A. McCann - Translating from ideas to execution", "kind": "Video", "description": "T.A. McCann, Founder and CEO of Gist, gives an overview of the company he founded and advocates planning ahead and deciding what you want to achieve. T.A. also describes the construct he uses to scrutinize his ideas.", "slug": "kauffman-ta-mccann2"}], "in_knowledge_map": false, "description": "T.A. McCann, Founder and CEO of Gist, talks about his entrepreneurial journey, including how he joined the America\u2019s Cup sailing team. T.A. discusses how entrepreneurs need to show initiative and chart their own course, advising other founders to always ask questions and make progress.", "node_slug": "ta-mccann", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ta-mccann", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ta-mccann", "kind": "Topic", "slug": "ta-mccann"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ben-milne/", "id": "ben-milne", "hide": false, "title": "Ben Milne - CEO of Dwolla", "child_data": [{"kind": "Video", "id": "x9d1dbdd8"}, {"kind": "Video", "id": "xc313d5ee"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ben-milne/kauffman-ben-milne1/", "id": "-ij_dFJvMYk", "title": "Ben Milne - CEO of Dwolla", "kind": "Video", "description": "Ben Milne, CEO of Dwolla, discusses his motivation in founding his company and the excitement of starting something new. Ben advocates for the idea that failure, which can happen in big and small ways, does not have to be your legacy.", "slug": "kauffman-ben-milne1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ben-milne/kauffman-ben-milne2/", "id": "ZJm57F8NGEc", "title": "Ben Milne - Importance of Curiosity", "kind": "Video", "description": "Ben Milne, CEO of Dwolla, discusses how tinkering and trying to figure out how the world works can lead to being a successful producer rather than just a consumer. Ben also addresses the importance of surrounding yourself with the right people to work on a problem that\u2019s meaningful to you.", "slug": "kauffman-ben-milne2"}], "in_knowledge_map": false, "description": "Ben Milne, CEO of Dwolla, discusses his motivation in founding his company and the excitement of starting something new. Ben advocates for the idea that failure, which can happen in big and small ways, does not have to be your legacy.", "node_slug": "ben-milne", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ben-milne", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/ben-milne", "kind": "Topic", "slug": "ben-milne"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/giles-shih/", "id": "giles-shih", "hide": false, "title": "Giles Shih - President and CEO of BioResource International", "child_data": [{"kind": "Video", "id": "x2a389e5f"}, {"kind": "Video", "id": "xf9bbab38"}, {"kind": "Video", "id": "xa462da7c"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/giles-shih/kauffman-giles-shih1/", "id": "yqCGsOfKdRM", "title": "Giles Shih - President and CEO of BioResource International", "kind": "Video", "description": "Giles Shih, President and CEO of BioResource International, describes his company and explains how producing \"big green chickens\" will help feed the world.", "slug": "kauffman-giles-shih1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/giles-shih/kauffman-giles-shih-2/", "id": "taTxFgtb1_Q", "title": "Giles Shih - The importance of education", "kind": "Video", "description": "Giles Shih, President and CEO of BioResource International, talks about how his education contributed to the growth of his business. Giles also discusses three key elements of starting your business as well as the significance to problem solving and being motivated by a cause important to you.", "slug": "kauffman-giles-shih-2"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/giles-shih/kauffman-giles-shih3/", "id": "p-cZzHxVoG8", "title": "Giles Shih - Making an idea into a business", "kind": "Video", "description": "Giles Shih, President and CEO of BioResource International, talks about his company\u2019s origins including founding along with his father. Giles also advises entrepreneurs to get out there and learn as you go.", "slug": "kauffman-giles-shih3"}], "in_knowledge_map": false, "description": "Giles Shih, President and CEO of BioResource International, describes his company and explains how producing \"big green chickens\" will help feed the world.", "node_slug": "giles-shih", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/giles-shih", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/giles-shih", "kind": "Topic", "slug": "giles-shih"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/danny-oneill/", "id": "danny-oneill", "hide": false, "title": "Danny O'Neill - President of The Roasterie", "child_data": [{"kind": "Video", "id": "xb62e74a7"}, {"kind": "Video", "id": "xa49fb089"}, {"kind": "Video", "id": "x891edd3f"}, {"kind": "Video", "id": "x44f4c318"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/danny-oneill/kauffman-danny-oneill1/", "id": "gtlaJuBuQvE", "title": "Danny O'Neill - President of The Roasterie", "kind": "Video", "description": "Danny O\u2019Neill, President of The Roasterie, describes the journey that led him to starting his own company as well as some of the key attributes of an entrepreneur.", "slug": "kauffman-danny-oneill1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/danny-oneill/kauffman-danny-oneill2/", "id": "hBES75bsh64", "title": "Danny O'Neill - Getting started", "kind": "Video", "description": "Danny O\u2019Neill, President of The Roasterie, describes the early days of his business, including how he fit a coffee roaster in his basement. Danny also tells the story of his first sale and how he figured out his early financials.", "slug": "kauffman-danny-oneill2"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/danny-oneill/kauffman-danny-oneill3/", "id": "q3d7488qjgs", "title": "Danny O'Neill - Finding the perfect customer", "kind": "Video", "description": "Danny O\u2019Neill, President of The Roasterie, discusses the importance of finding your perfect customer.", "slug": "kauffman-danny-oneill3"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/danny-oneill/kauffman-danny-oneill4/", "id": "23GcWeVJMTQ", "title": "Danny O'Neill - Differentiation in your market", "kind": "Video", "description": "Danny O\u2019Neill, President of The Roasterie, talks about differentiation in your market. Danny goes on to describe how changing your strategy can have its trade-offs, including influencing your company\u2019s value and mission.", "slug": "kauffman-danny-oneill4"}], "in_knowledge_map": false, "description": "Danny O\u2019Neill, President of The Roasterie, describes the journey that led him to starting his own company as well as some of the key attributes of an entrepreneur.", "node_slug": "danny-oneill", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/danny-oneill", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/danny-oneill", "kind": "Topic", "slug": "danny-oneill"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lara-morgan/", "id": "lara-morgan", "hide": false, "title": "Lara Morgan - Founder of Pacific Direct", "child_data": [{"kind": "Video", "id": "x36e13fa7"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lara-morgan/kauffman-lara-morgan/", "id": "JBOFe2nwob4", "title": "Lara Morgan - Founder of Pacific Direct", "kind": "Video", "description": "Lara Morgan, Founder of Pacific Direct, shares her entrepreneurial story and describes her motivations in founding companies. Lara describes how understanding the mechanisms of money, along with a fearlessness of asking questionshelped her company grow.", "slug": "kauffman-lara-morgan"}], "in_knowledge_map": false, "description": "Lara Morgan, Founder of Pacific Direct, shares her entrepreneurial story and describes her motivations in founding companies. Lara describes how understanding the mechanisms of money, along with a fearlessness of asking questionshelped her company grow.", "node_slug": "lara-morgan", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lara-morgan", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lara-morgan", "kind": "Topic", "slug": "lara-morgan"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/dave-smith/", "id": "dave-smith", "hide": false, "title": "Dave Smith - CEO & Founder of TekScape IT", "child_data": [{"kind": "Video", "id": "xc6587a0a"}, {"kind": "Video", "id": "xeae1df67"}, {"kind": "Video", "id": "xb5cef5ce"}, {"kind": "Video", "id": "x05bb4621"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/dave-smith/kauffman-dave-smith-1/", "id": "MAV3ZT9Byew", "title": "Developing Value for the Product", "kind": "Video", "description": "When Dave Smith came to the harsh realization and he alone was in charge of his future, he took a resourceful route to become an expert in his field. Mixing the desire to make it with the imagination to fake it, he went to great lengths to connect with TekScape IT customers and make them believe that his tiny organization was big enough to solve their trickiest problems.", "slug": "kauffman-dave-smith-1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/dave-smith/kauffman-dave-smith-2/", "id": "ixE3APFcFdA", "title": "Engineering a Solution to Every Problem", "kind": "Video", "description": "When Dave Smith came to the harsh realization and he alone was in charge of his future, he took a resourceful route to become an expert in his field. Mixing the desire to make it with the imagination to fake it, he went to great lengths to connect with TekScape IT customers and make them believe that his tiny organization was big enough to solve their trickiest problems.", "slug": "kauffman-dave-smith-2"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/dave-smith/kauffman-dave-smith-3/", "id": "AfaFiSLM2hw", "title": "Shifting from Loyalty to Accountability", "kind": "Video", "description": "When Dave Smith came to the harsh realization and he alone was in charge of his future, he took a resourceful route to become an expert in his field. Mixing the desire to make it with the imagination to fake it, he went to great lengths to connect with TekScape IT customers and make them believe that his tiny organization was big enough to solve their trickiest problems.", "slug": "kauffman-dave-smith-3"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/dave-smith/kauffman-dave-smith-4/", "id": "5MA0NQObHUk", "title": "Top of the World, Ma", "kind": "Video", "description": "When Dave Smith came to the harsh realization and he alone was in charge of his future, he took a resourceful route to become an expert in his field. Mixing the desire to make it with the imagination to fake it, he went to great lengths to connect with TekScape IT customers and make them believe that his tiny organization was big enough to solve their trickiest problems.", "slug": "kauffman-dave-smith-4"}], "in_knowledge_map": false, "description": "When Dave Smith came to the harsh realization and he alone was in charge of his future, he took a resourceful route to become an expert in his field. Mixing the desire to make it with the imagination to fake it, he went to great lengths to connect with TekScape IT customers and make them believe that his tiny organization was big enough to solve their trickiest problems.", "node_slug": "dave-smith", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/dave-smith", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/dave-smith", "kind": "Topic", "slug": "dave-smith"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/renaud-laplance/", "id": "renaud-laplance", "hide": false, "title": "Renaud Laplanche - Founder of Lending Club", "child_data": [{"kind": "Video", "id": "x5d82f6aa"}, {"kind": "Video", "id": "x761e4ce4"}, {"kind": "Video", "id": "x368db711"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/renaud-laplance/kauffman-renaud-laplanche-1/", "id": "GWsVTu1rgUo", "title": "Finding an Idea in the Mail", "kind": "Video", "description": "Renaud Laplanche was opening his mail when the idea for Lending Club came to him. He tells the story of seeing\nthe opportunity and creating the online Lending Club to fill the gap in the financial industries market. Laplache\u2019s\u00a0\ncompetitive nature extends to one-man sailboat racing and he compares the risks and rewards of racing with setting\u00a0\nthe pace as an entrepreneur.", "slug": "kauffman-renaud-laplanche-1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/renaud-laplance/kauffman-renaud-laplanche-2/", "id": "5SHOKpT2bwg", "title": "Building Trust and Confidence", "kind": "Video", "description": "Renaud Laplanche was opening his mail when the idea for Lending Club came to him. He tells the story of seeing\nthe opportunity and creating the online Lending Club to fill the gap in the financial industries market. Laplache\u2019s\u00a0\ncompetitive nature extends to one-man sailboat racing and he compares the risks and rewards of racing with setting\u00a0\nthe pace as an entrepreneur.", "slug": "kauffman-renaud-laplanche-2"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/renaud-laplance/kauffman-renaud-laplanche-3/", "id": "STB4pbEJxc8", "title": "Sailing the Seas of Entrepreneurship", "kind": "Video", "description": "Renaud Laplanche was opening his mail when the idea for Lending Club came to him. He tells the story of seeing\u00a0\nthe opportunity and creating the online Lending Club to fill the gap in the financial industries market. Laplache\u2019s\ncompetitive nature extends to one-man sailboat racing and he compares the risks and rewards of racing with setting\nthe pace as an entrepreneur.", "slug": "kauffman-renaud-laplanche-3"}], "in_knowledge_map": false, "description": "Renaud Laplanche was opening his mail when the idea for Lending Club came to him. He tells the story of seeing \n\nthe opportunity and creating the online Lending Club to fill the gap in the financial industries market. Laplache\u2019s\n\ncompetitive nature extends to one-man sailboat racing and he compares the risks and rewards of racing with setting\n\nthe pace as an entrepreneur.", "node_slug": "renaud-laplance", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/renaud-laplance", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/renaud-laplance", "kind": "Topic", "slug": "renaud-laplance"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/jason-christiansen/", "id": "jason-christiansen", "hide": false, "title": "Jason Christiansen - President & CEO of Rigid Industries", "child_data": [{"kind": "Video", "id": "x7c284534"}, {"kind": "Video", "id": "x572a7923"}, {"kind": "Video", "id": "x22804f04"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/jason-christiansen/jason-christiansen-3/", "id": "3ckdqEsQJaw", "title": "Turning a Hobby into a Bright Business", "kind": "Video", "description": "Jason Christiansen has heard all the familiar comparisons between running a business and being a team player, but as a former major league baseball player, he steps to the plate with a unique perspective. Christiansen talks about building Rigid Industries and how the company deals with imitation product lines and compares the pressure of standing on the mound to standing before his team of employees.", "slug": "jason-christiansen-3"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/jason-christiansen/jason-christiansen-2/", "id": "fXF6vm-6TBE", "title": "The World of Copy Cat Companies", "kind": "Video", "description": "Jason Christiansen has heard all the familiar comparisons between running a business and being a team player, but\u00a0as a former major league baseball player, he steps to the plate with a unique perspective. Christiansen talks about\u00a0building Rigid Industries and how the company deals with imitation product lines and compares the pressure of\u00a0\nstanding on the mound to standing before his team of employees.", "slug": "jason-christiansen-2"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/jason-christiansen/jason-christiansen-1/", "id": "NVSFyfli12I", "title": "Baseball is Just a Game", "kind": "Video", "description": "Jason Christiansen has heard all the familiar comparisons between running a business and being a team player, but as a former major league baseball player, he steps to the plate with a unique perspective. Christiansen talks about building Rigid Industries and how the company deals with imitation product lines and compares the pressure of standing on the mound to standing before his team of employees.", "slug": "jason-christiansen-1"}], "in_knowledge_map": false, "description": "Jason Christiansen has heard all the familiar comparisons between running a business and being a team player, but as a former major league baseball player, he steps to the plate with a unique perspective. Christiansen talks about building Rigid Industries and how the company deals with imitation product lines and compares the pressure of standing on the mound to standing before his team of employees.", "node_slug": "jason-christiansen", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/jason-christiansen", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/jason-christiansen", "kind": "Topic", "slug": "jason-christiansen"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/linda-jeschofnig/", "id": "Linda-Jeschofnig", "hide": false, "title": "Linda Jeschofnig - Co-founder of Hands-On Labs", "child_data": [{"kind": "Video", "id": "x9f5dff91"}, {"kind": "Video", "id": "x88efb37b"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/linda-jeschofnig/kauffman-linda-jeschofnig-1/", "id": "Y0ibXbKwN4w", "title": "Creating a Poof and Not a Giant Kaboom", "kind": "Video", "description": "A passion for science education led Linda Jeschognig from her life in accounting to a second act as an entrepreneur. She talks about the inspiration behind Hands-on Labs and overcoming the obstacles with a company created to send kits containing hydrochloric acid, cobalt nitrate and other hazardous elements to college chemistry students. Along the way, Jeschofnig has gained support and reached out to guide other women on the entrepreneurial path.", "slug": "kauffman-linda-jeschofnig-1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/linda-jeschofnig/kauffman-linda-jeschofnig-2/", "id": "62ZlRO8BCUw", "title": "A Passion for Science Education", "kind": "Video", "description": "A passion for science education led Linda Jeschognig from her life in accounting to a second act as an entrepreneur. She talks about the inspiration behind Hands-on Labs and overcoming the obstacles with a company created to send kits containing hydrochloric acid, cobalt nitrate and other hazardous elements to college chemistry students. Along the way, Jeschofnig has gained support and reached out to guide other women on the entrepreneurial path.", "slug": "kauffman-linda-jeschofnig-2"}], "in_knowledge_map": false, "description": "A passion for science education led Linda Jeschognig from her life in accounting to a second act as an entrepreneur. She talks about the inspiration behind Hands-on Labs and overcoming the obstacles with a company created to send kits containing hydrochloric acid, cobalt nitrate and other hazardous elements to college chemistry students. Along the way, Jeschofnig has gained support and reached out to guide other women on the entrepreneurial path.", "node_slug": "Linda-Jeschofnig", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/Linda-Jeschofnig", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/Linda-Jeschofnig", "kind": "Topic", "slug": "linda-jeschofnig"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lakeshia-grant/", "id": "lakeshia-grant", "hide": false, "title": "LaKeshia Grant - CEO & Founder of Virtual Enterprise Architects", "child_data": [{"kind": "Video", "id": "xcc589d09"}, {"kind": "Video", "id": "x313ab1f1"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lakeshia-grant/lakeshia-grant-0/", "id": "S4iQ46ISqRQ", "title": "Being Heard and Giving Others a Voice", "kind": "Video", "description": "LaKeshia Grant founded Virtual Enterprise Architects as a place where she would have a voice and create an environment where others could be heard. She discusses her industry and encourages would-be entrepreneurs to incorporate their core values in their business. Grant\u2019s mother may not know exactly what the information technology business does, but she instilled a strong work ethic and the spirit of entrepreneurship in her daughter.", "slug": "lakeshia-grant-0"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lakeshia-grant/lakeshia-grant-1/", "id": "yC3vsJJIcE0", "title": "Business and Family", "kind": "Video", "description": "LaKeshia Grant founded Virtual Enterprise Architects as a place where she would have a voice and create an environment where others could be heard. She discusses her industry and encourages would-be entrepreneurs to incorporate their core values in their business. Grant\u2019s mother may not know exactly what the information technology business does, but she instilled a strong work ethic and the spirit of entrepreneurship in her daughter.", "slug": "lakeshia-grant-1"}], "in_knowledge_map": false, "description": "LaKeshia Grant founded Virtual Enterprise Architects as a place where she would have a voice and create an environment where others could be heard. She discusses her industry and encourages would-be entrepreneurs to incorporate their core values in their business. Grant\u2019s mother may not know exactly what the information technology business does, but she instilled a strong work ethic and the spirit of entrepreneurship in her daughter.", "node_slug": "lakeshia-grant", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lakeshia-grant", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/lakeshia-grant", "kind": "Topic", "slug": "lakeshia-grant"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/warby-parker/", "id": "warby-parker", "hide": false, "title": "Dave Gilboa & Neil Blumenthal - Co-founders & Co-CEOs of Warby Parker", "child_data": [{"kind": "Video", "id": "xe54f6d28"}, {"kind": "Video", "id": "xd5e981df"}, {"kind": "Video", "id": "x77943a33"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/warby-parker/warby-parker-1/", "id": "K9RPyi0klYo", "title": "A fix for a broken industry", "kind": "Video", "slug": "warby-parker-1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/warby-parker/warby-parker-2/", "id": "Q94h1W5H1Nk", "title": "It was just mayhem", "kind": "Video", "slug": "warby-parker-2"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/warby-parker/warby-parker-3/", "id": "wfY2vx3P0cE", "title": "Starting and staying in business with friends", "kind": "Video", "slug": "warby-parker-3"}], "in_knowledge_map": false, "description": "The visionaries who founded Warby Parker were friends and classmates at the Wharton School at the University of Pennsylvania who challenged convention, disrupted an industry and created an organization that did something good in the world. Dave Gilboa and Neil Blumenthal, along with Andrew Hunt and Jeffrey Raider, set ambitious targets for themselves and committed to have fun along the way.", "node_slug": "warby-parker", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/warby-parker", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/warby-parker", "kind": "Topic", "slug": "warby-parker"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/bottle-rocket-apps/", "id": "bottle-rocket-apps", "hide": false, "title": "Calvin Carter - Founder of Bottle Rocket Apps", "child_data": [{"kind": "Video", "id": "x2e4739f4"}, {"kind": "Video", "id": "x60ea3ec7"}, {"kind": "Video", "id": "x6d5f9b86"}, {"kind": "Video", "id": "xfe96817e"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/bottle-rocket-apps/calvin-carter-1/", "id": "YoHhP6a_3GY", "title": "A 2 a.m. wake up call", "kind": "Video", "slug": "calvin-carter-1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/bottle-rocket-apps/calvin-carter-2/", "id": "qnKxHDBok4A", "title": "Living the company\u2019s values", "kind": "Video", "slug": "calvin-carter-2"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/bottle-rocket-apps/calvin-carter-3/", "id": "TLU9Hdt14Kc", "title": "The excitement of making something", "kind": "Video", "slug": "calvin-carter-3"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/bottle-rocket-apps/calvin-carter-4/", "id": "3NYhESueUfE", "title": "Making money making apps", "kind": "Video", "slug": "calvin-carter-4"}], "in_knowledge_map": false, "description": "The day after Steve Jobs announced that Apple was opening its platform to third party developers Calvin Carter bought pencils and a pad of paper and began sketching applications. Today developers at Bottle Rocket Apps still use pencil and paper as they begin the process of producing custom, high-end mobil apps for some the world\u2019s leading brands. Along the way they hold on to their passion and stay focused on their mission.", "node_slug": "bottle-rocket-apps", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/bottle-rocket-apps", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/bottle-rocket-apps", "kind": "Topic", "slug": "bottle-rocket-apps"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/beth-schmidt-wishbone/", "id": "beth-schmidt-wishbone", "hide": false, "title": "Beth Schmidt - Founder of Wishbone.org", "child_data": [{"kind": "Video", "id": "xbb1c9a7d"}, {"kind": "Video", "id": "x136fcb87"}, {"kind": "Video", "id": "x21bdf7f3"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/beth-schmidt-wishbone/beth-schmidt-1/", "id": "ghE1UnbIP4M", "title": "Students wishes come true", "kind": "Video", "slug": "beth-schmidt-1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/beth-schmidt-wishbone/beth-schmidt-2/", "id": "YjGE-sZhxHQ", "title": "There better be an authentic need", "kind": "Video", "slug": "beth-schmidt-2"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/beth-schmidt-wishbone/beth-schmidt-3/", "id": "waqE7cI1LxE", "title": "An invitation for innovation", "kind": "Video", "slug": "beth-schmidt-3"}], "in_knowledge_map": false, "description": "Beth Schmidt was a Teach for America Corps Member teaching 10th Grade English at Locke High School in South Central, Los Angeles, when she asked her class to write about their passion and an after-school and summer program they wanted to attend. Their essays prompted her to find a way to make these life-changing opportunities available to her students. She started Wishbone to send students to programs that they otherwise wouldn\u2019t be able to afford.", "node_slug": "beth-schmidt-wishbone", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/beth-schmidt-wishbone", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/beth-schmidt-wishbone", "kind": "Topic", "slug": "beth-schmidt-wishbone"}, {"icon_src": "", "contains": ["Video"], "path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/toby-rush-eyeverify/", "id": "toby-rush-eyeverify", "hide": false, "title": "Toby Rush - CEO & Founder of EyeVerify", "child_data": [{"kind": "Video", "id": "x02b95503"}, {"kind": "Video", "id": "xeb8b76d6"}], "children": [{"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/toby-rush-eyeverify/toby-rush-1/", "id": "Ro5tCQtfrZU", "title": "University scientist meets entrepreneur", "kind": "Video", "slug": "toby-rush-1"}, {"path": "khan/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/toby-rush-eyeverify/toby-rush-2/", "id": "Etx366BN34g", "title": "Staying grounded", "kind": "Video", "slug": "toby-rush-2"}], "in_knowledge_map": false, "description": "Toby Rush looks for hard problems to solve and ways to apply simple solutions for bringing products to market. He teamed with university scientist to develop EyeVerify Inc., which uses EyePrint ID, a highly accurate biometric technology that uses existing cameras on mobile devices to image and pattern match the blood vessels in the whites of the eye.", "node_slug": "toby-rush-eyeverify", "render_type": "Tutorial", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/toby-rush-eyeverify", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs/toby-rush-eyeverify", "kind": "Topic", "slug": "toby-rush-eyeverify"}], "in_knowledge_map": false, "description": "Personal lessons and insights from accomplished entrepreneurs are the basis of this interview series produced by the Ewing Marion Kauffman Foundation and Khan Academy.", "node_slug": "interviews-entrepreneurs", "render_type": "Topic", "topic_page_url": "/economics-finance-domain/entrepreneurship2/interviews-entrepreneurs", "extended_slug": "economics-finance-domain/entrepreneurship2/interviews-entrepreneurs", "kind": "Topic", "slug": "interviews-entrepreneurs"}], "in_knowledge_map": false, "description": "", "node_slug": "entrepreneurship2", "render_type": "Subject", "topic_page_url": "/economics-finance-domain/entrepreneurship2", "extended_slug": "economics-finance-domain/entrepreneurship2", "kind": "Topic", "slug": "entrepreneurship2"}], "in_knowledge_map": false, "description": "Microeconomics, macroeconomics, finance, accounting and capital markets.", "node_slug": "economics-finance-domain", "render_type": "Domain", "topic_page_url": "/economics-finance-domain", "extended_slug": "economics-finance-domain", "kind": "Topic", "slug": "economics-finance-domain"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/", "id": "humanities", "hide": false, "title": "Arts and humanities", "child_data": [{"kind": "Topic", "id": "x66f79d8a"}, {"kind": "Topic", "id": "x15c3149c"}, {"kind": "Topic", "id": "x5dad6980"}, {"kind": "Topic", "id": "x23dc2cae"}, {"kind": "Topic", "id": "x082c798e"}, {"kind": "Topic", "id": "x7e1ef7a0"}, {"kind": "Topic", "id": "x7e914f5b"}, {"kind": "Topic", "id": "x4b0eb531"}, {"kind": "Topic", "id": "x9020ac79"}, {"kind": "Topic", "id": "xa6688040"}, {"kind": "Topic", "id": "xbcdaeeee"}, {"kind": "Topic", "id": "xf20f462f"}, {"kind": "Topic", "id": "x4910f52e"}, {"kind": "Topic", "id": "xdc974a79"}, {"kind": "Topic", "id": "x247213a3"}, {"kind": "Topic", "id": "x97ec695a"}, {"kind": "Topic", "id": "x1f9f8bff"}, {"kind": "Topic", "id": "xa3626015"}, {"kind": "Topic", "id": "xeaa3470a"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/history/", "id": "history", "hide": false, "title": "History", "child_data": [{"kind": "Topic", "id": "xf121c1dc"}, {"kind": "Topic", "id": "xbb820063"}, {"kind": "Topic", "id": "xeb4863fd"}, {"kind": "Topic", "id": "x5b63dd0b"}, {"kind": "Topic", "id": "x8d361957"}, {"kind": "Topic", "id": "x7105f0f2"}, {"kind": "Topic", "id": "x0880bce4"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/history/euro-hist/", "id": "euro-hist", "hide": false, "title": "1900 - present: The recent past", "child_data": [{"kind": "Topic", "id": "x6b56a225"}, {"kind": "Topic", "id": "x3a5e93c6"}, {"kind": "Topic", "id": "xada17092"}, {"kind": "Topic", "id": "xf9b473a5"}, {"kind": "Topic", "id": "x297c9471"}, {"kind": "Topic", "id": "x2d3f2fbe"}, {"kind": "Topic", "id": "xe4f72825"}, {"kind": "Topic", "id": "xb2537127"}, {"kind": "Topic", "id": "x3f361c7b"}, {"kind": "Topic", "id": "xbf3fa3d6"}, {"kind": "Topic", "id": "x2a14c9d6"}, {"kind": "Topic", "id": "x9d3622a8"}, {"kind": "Topic", "id": "x428310fd"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/euro-hist/world-war-i-tutorial/", "id": "world-war-I-tutorial", "hide": false, "title": "Beginning of World War I", "child_data": [{"kind": "Video", "id": "xcfd27578"}, {"kind": "Video", "id": "x5593b29e"}, {"kind": "Video", "id": "xb639994b"}, {"kind": "Video", "id": "x0691b50e"}, {"kind": "Video", "id": "x465b5bff"}, {"kind": "Video", "id": "x816d6038"}, {"kind": "Exercise", "id": "xbe7b594f"}], "children": [{"path": "khan/humanities/history/euro-hist/world-war-i-tutorial/empires-before-world-war-i/", "id": "IyoUWRAharQ", "title": "Empires before World War I", "kind": "Video", "description": "Austria-Hungary. Ottoman empire. British, German, French and Russian empires.", "slug": "empires-before-world-war-i"}, {"path": "khan/humanities/history/euro-hist/world-war-i-tutorial/german-and-italian-empires-in-1914/", "id": "UNgx_YSygyU", "title": "German and Italian Empires in 1914", "kind": "Video", "description": "Italian and German Empires in 1914. Tsingtao beer.", "slug": "german-and-italian-empires-in-1914"}, {"path": "khan/humanities/history/euro-hist/world-war-i-tutorial/alliances-leading-to-world-war-i/", "id": "KMMAL3v0lA0", "title": "Alliances leading to World War I", "kind": "Video", "slug": "alliances-leading-to-world-war-i"}, {"path": "khan/humanities/history/euro-hist/world-war-i-tutorial/language-and-religion-of-the-former-yugoslavia/", "id": "6RKMRBxDm20", "title": "Language and religion of the former Yugoslavia", "kind": "Video", "slug": "language-and-religion-of-the-former-yugoslavia"}, {"path": "khan/humanities/history/euro-hist/world-war-i-tutorial/assassination-of-franz-ferdinand-by-gavrilo-princip/", "id": "heKuwogLwnk", "title": "Assassination of Franz Ferdinand by Gavrilo Princip", "kind": "Video", "slug": "assassination-of-franz-ferdinand-by-gavrilo-princip"}, {"path": "khan/humanities/history/euro-hist/world-war-i-tutorial/the-great-war-begins/", "id": "huOnuYAyv6w", "title": "The Great War begins", "kind": "Video", "slug": "the-great-war-begins"}, {"path": "khan/humanities/history/euro-hist/world-war-i-tutorial/world-war-i-causes/", "id": "world-war-I-causes", "title": "Causes of World War I", "slug": "world-war-i-causes", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Called the Great War (before World War II came about), World War I was the bloody wake-up call that humanity was entering into a new stage of civilization. Really the defining conflict that took Europe from 19th Century Imperial states that saw heroism in war into a modern shape. Unfortunately, it had to go through World War II as well (that some would argue was due to imbalances created by World War I).", "node_slug": "world-war-I-tutorial", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/world-war-I-tutorial", "extended_slug": "humanities/history/euro-hist/world-war-I-tutorial", "kind": "Topic", "slug": "world-war-i-tutorial"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/euro-hist/american-entry-world-war-i/", "id": "american-entry-world-war-I", "hide": false, "title": "Blockades and American entry", "child_data": [{"kind": "Video", "id": "x9cd8bc4f"}, {"kind": "Video", "id": "xeb59706d"}, {"kind": "Video", "id": "xa235069b"}, {"kind": "Article", "id": "xb500ddbc"}, {"kind": "Article", "id": "xe57963e3"}, {"kind": "Exercise", "id": "xaa4df83f"}], "children": [{"path": "khan/humanities/history/euro-hist/american-entry-world-war-i/blockades-u-boats-and-sinking-of-the-lusitania/", "id": "B_P48TakY3Y", "title": "Blockades, u-boats and sinking of the Lusitania", "kind": "Video", "slug": "blockades-u-boats-and-sinking-of-the-lusitania"}, {"path": "khan/humanities/history/euro-hist/american-entry-world-war-i/zimmermann-telegram/", "id": "Gedy8LwQTaw", "title": "Zimmermann Telegram", "kind": "Video", "slug": "zimmermann-telegram"}, {"path": "khan/humanities/history/euro-hist/american-entry-world-war-i/united-states-enters-world-war-i/", "id": "dHXzusNSF60", "title": "United States enters World War I", "kind": "Video", "slug": "united-states-enters-world-war-i"}, {"path": "khan/humanities/history/euro-hist/american-entry-world-war-i/ww1blockades/", "id": "ww1blockades", "title": "WWI Blockades and America", "slug": "ww1blockades", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Naval blockades in World War I to starve enemy nation of trade.\n\nContrary to what many think, American entry into WWI was not due purely to the sinking of the Lusitania. Learn more about what caused the United States to play its first major direct role in a European conflict.", "node_slug": "american-entry-world-war-I", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/american-entry-world-war-I", "extended_slug": "humanities/history/euro-hist/american-entry-world-war-I", "kind": "Topic", "slug": "american-entry-world-war-i"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/euro-hist/world-war-i-fighting/", "id": "world-war-I-fighting", "hide": false, "title": "Western and Eastern fronts of World War I", "child_data": [{"kind": "Video", "id": "x6141ef88"}, {"kind": "Video", "id": "xfa09eab1"}, {"kind": "Video", "id": "xb27db865"}, {"kind": "Video", "id": "x3e4cf0de"}, {"kind": "Video", "id": "xd73dff5e"}, {"kind": "Video", "id": "x619d8678"}, {"kind": "Exercise", "id": "x7082f7fe"}], "children": [{"path": "khan/humanities/history/euro-hist/world-war-i-fighting/schlieffen-plan-and-the-first-battle-of-the-marne/", "id": "7AOOlxbZN3E", "title": "Schlieffen Plan and the First Battle of the Marne", "kind": "Video", "slug": "schlieffen-plan-and-the-first-battle-of-the-marne"}, {"path": "khan/humanities/history/euro-hist/world-war-i-fighting/comparing-the-eastern-and-western-fronts-in-wwi/", "id": "qPoLL0E2W8A", "title": "Comparing the Eastern and Western fronts in WWI", "kind": "Video", "slug": "comparing-the-eastern-and-western-fronts-in-wwi"}, {"path": "khan/humanities/history/euro-hist/world-war-i-fighting/world-war-i-eastern-front/", "id": "ATuMxyoVh_8", "title": "World War I Eastern front", "kind": "Video", "slug": "world-war-i-eastern-front"}, {"path": "khan/humanities/history/euro-hist/world-war-i-fighting/battles-of-verdun-somme-and-the-hindenburg-line/", "id": "jR_XZyhLSA8", "title": "Battles of Verdun, Somme and the Hindenburg Line", "kind": "Video", "slug": "battles-of-verdun-somme-and-the-hindenburg-line"}, {"path": "khan/humanities/history/euro-hist/world-war-i-fighting/closing-stages-of-world-war-i/", "id": "xFBK9534NI8", "title": "Closing stages of World War I", "kind": "Video", "slug": "closing-stages-of-world-war-i"}, {"path": "khan/humanities/history/euro-hist/world-war-i-fighting/technology-in-world-war-i/", "id": "4bmPvB15aYU", "title": "Technology in World War I", "kind": "Video", "slug": "technology-in-world-war-i"}, {"path": "khan/humanities/history/euro-hist/world-war-i-fighting/easter-western-fronts-ww1/", "id": "easter-western-fronts-ww1", "title": "Eastern and Western fronts of World War I", "slug": "easter-western-fronts-ww1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial goes into some detail to describe the tactics and battles of the two major fronts of World War I--the Western Front and the Eastern Front.", "node_slug": "world-war-I-fighting", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/world-war-I-fighting", "extended_slug": "humanities/history/euro-hist/world-war-I-fighting", "kind": "Topic", "slug": "world-war-i-fighting"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/euro-hist/other-fronts-ww1/", "id": "other-fronts-ww1", "hide": false, "title": "Other fronts of World War I", "child_data": [{"kind": "Video", "id": "x735db001"}, {"kind": "Video", "id": "xaa55a9cc"}, {"kind": "Video", "id": "x46fae636"}, {"kind": "Video", "id": "x710def83"}, {"kind": "Video", "id": "xbe15f842"}, {"kind": "Exercise", "id": "x0796b7bc"}], "children": [{"path": "khan/humanities/history/euro-hist/other-fronts-ww1/serbian-and-macedonian-fronts/", "id": "WX4T9NjYG94", "title": "Serbian and Macedonian fronts", "kind": "Video", "slug": "serbian-and-macedonian-fronts"}, {"path": "khan/humanities/history/euro-hist/other-fronts-ww1/serbian-losses-in-world-war-i/", "id": "dpnFYrz2fCE", "title": "Serbian losses in World War I", "kind": "Video", "slug": "serbian-losses-in-world-war-i"}, {"path": "khan/humanities/history/euro-hist/other-fronts-ww1/italy-backs-out-of-triple-alliance/", "id": "ay1QGPg2R98", "title": "Italy backs out of Triple Alliance", "kind": "Video", "slug": "italy-backs-out-of-triple-alliance"}, {"path": "khan/humanities/history/euro-hist/other-fronts-ww1/italian-front-in-world-war-i/", "id": "mQyM-4YqHMM", "title": "Italian front in World War I", "kind": "Video", "slug": "italian-front-in-world-war-i"}, {"path": "khan/humanities/history/euro-hist/other-fronts-ww1/japan-in-world-war-i/", "id": "NTUjMpfYWwE", "title": "Japan in World War I", "kind": "Video", "slug": "japan-in-world-war-i"}, {"path": "khan/humanities/history/euro-hist/other-fronts-ww1/ww1-secondary-fronts/", "id": "ww1-secondary-fronts", "title": "Secondary fronts of WWI", "slug": "ww1-secondary-fronts", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Contrary to what some history books and movies would have you believe, World War I was not just fought on the Western and/or Eastern fronts. Because of the empires involved, it was a truly global conflict. This tutorial will cover some of the campaigns that your history book might not (but are important to understanding the War).", "node_slug": "other-fronts-ww1", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/other-fronts-ww1", "extended_slug": "humanities/history/euro-hist/other-fronts-ww1", "kind": "Topic", "slug": "other-fronts-ww1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/euro-hist/middle-east-20th-century/", "id": "middle-east-20th-century", "hide": false, "title": "World War I shapes the Middle East", "child_data": [{"kind": "Video", "id": "x51b2ecd5"}, {"kind": "Video", "id": "x30d4f0ae"}, {"kind": "Video", "id": "x291864f5"}, {"kind": "Video", "id": "x09cfed08"}, {"kind": "Exercise", "id": "x5b239a9d"}], "children": [{"path": "khan/humanities/history/euro-hist/middle-east-20th-century/theodor-herzl-and-the-birth-of-political-zionism/", "id": "g8sxNa-E-H0", "title": "Theodor Herzl and the birth of political Zionism", "kind": "Video", "slug": "theodor-herzl-and-the-birth-of-political-zionism"}, {"path": "khan/humanities/history/euro-hist/middle-east-20th-century/sinai-palestine-and-mesopotamia-campaigns/", "id": "L3Ka3oRD8G8", "title": "Sinai, Palestine and Mesopotamia campaigns", "kind": "Video", "slug": "sinai-palestine-and-mesopotamia-campaigns"}, {"path": "khan/humanities/history/euro-hist/middle-east-20th-century/sykes-picot-agreement-and-the-balfour-declaration/", "id": "eIfQ4GfSz3U", "title": "Sykes-Picot Agreement and the Balfour Declaration", "kind": "Video", "slug": "sykes-picot-agreement-and-the-balfour-declaration"}, {"path": "khan/humanities/history/euro-hist/middle-east-20th-century/arabia-after-world-war-i/", "id": "zbQFQ_nzbhI", "title": "Arabia after World War I", "kind": "Video", "slug": "arabia-after-world-war-i"}, {"path": "khan/humanities/history/euro-hist/middle-east-20th-century/mideast-ww1/", "id": "mideast-ww1", "title": "The Middle East during and after WWI", "slug": "mideast-ww1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The Middle East is a center of cultures, religions, and, unfortunately, conflict in our modern world. This tutorial takes us from a declining Ottoman Empire to the modern Middle East which is still the center of many religions, cultures and conflicts.", "node_slug": "middle-east-20th-century", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/middle-east-20th-century", "extended_slug": "humanities/history/euro-hist/middle-east-20th-century", "kind": "Topic", "slug": "middle-east-20th-century"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/euro-hist/ww1-aftermath/", "id": "ww1-aftermath", "hide": false, "title": "Aftermath of World War I", "child_data": [{"kind": "Video", "id": "xc7179262"}, {"kind": "Video", "id": "xf067c7c4"}, {"kind": "Video", "id": "xf813f0ff"}, {"kind": "Video", "id": "x902f1193"}, {"kind": "Video", "id": "x09cfed08"}, {"kind": "Exercise", "id": "xd80aa170"}], "children": [{"path": "khan/humanities/history/euro-hist/ww1-aftermath/deaths-in-world-war-i/", "id": "kOf8fU9iduA", "title": "Deaths in World War I", "kind": "Video", "slug": "deaths-in-world-war-i"}, {"path": "khan/humanities/history/euro-hist/ww1-aftermath/woodrow-wilson-s-fourteen-points/", "id": "XMElagkUBmY", "title": "Woodrow Wilson's Fourteen Points", "kind": "Video", "slug": "woodrow-wilson-s-fourteen-points"}, {"path": "khan/humanities/history/euro-hist/ww1-aftermath/paris-peace-conference-and-treaty-of-versailles/", "id": "o1IFePaNENQ", "title": "Paris Peace Conference and Treaty of Versailles", "kind": "Video", "slug": "paris-peace-conference-and-treaty-of-versailles"}, {"path": "khan/humanities/history/euro-hist/ww1-aftermath/more-detail-on-the-treaty-of-versailles-and-germany/", "id": "TmFET3F64pE", "title": "More detail on the Treaty of Versailles and Germany", "kind": "Video", "slug": "more-detail-on-the-treaty-of-versailles-and-germany"}, {"path": "khan/humanities/history/euro-hist/ww1-aftermath/arabia-after-world-war-i/", "id": "zbQFQ_nzbhI", "title": "Arabia after World War I", "kind": "Video", "slug": "arabia-after-world-war-i"}, {"path": "khan/humanities/history/euro-hist/ww1-aftermath/ww1-aftermath/", "id": "ww1-aftermath", "title": "WWI Aftermath", "slug": "ww1-aftermath", "kind": "Exercise"}], "in_knowledge_map": false, "description": "World war I (or the Great War) was a defining event for the 20th Century. It marked the end (or beginning of the end) of centuries-old empires and the dawn-of newly independent states based on ethnic and linguistic commonality. It didn't just change the face of Europe, it changed the face of the world.\n\nFrom the Paris Peace Conference and Treaty of Versailles, we'll see how the end of World War I may have been just the set up for even more conflict in Europe and the world.", "node_slug": "ww1-aftermath", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/ww1-aftermath", "extended_slug": "humanities/history/euro-hist/ww1-aftermath", "kind": "Topic", "slug": "ww1-aftermath"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/history/euro-hist/world-war-i-quiz/", "id": "world-war-i-quiz", "hide": false, "title": "World War I Quiz", "child_data": [{"kind": "Exercise", "id": "xf1c4e05a"}], "children": [{"path": "khan/humanities/history/euro-hist/world-war-i-quiz/world_war_i/", "id": "world_war_i", "title": "World War I", "slug": "world_war_i", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Test your comprehension of the causes, dynamics and aftermath of World War I (as covered in the tutorials in this topic) by taking this quiz.", "node_slug": "world-war-i-quiz", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/world-war-i-quiz", "extended_slug": "humanities/history/euro-hist/world-war-i-quiz", "kind": "Topic", "slug": "world-war-i-quiz"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/euro-hist/hitler-nazis/", "id": "hitler-nazis", "hide": false, "title": "Rise of Hitler and the Nazis", "child_data": [{"kind": "Video", "id": "xee428366"}, {"kind": "Video", "id": "x30ffec6e"}, {"kind": "Video", "id": "xb7ca1478"}, {"kind": "Video", "id": "xf5ec1089"}, {"kind": "Video", "id": "xc65a725e"}, {"kind": "Exercise", "id": "xefc1e7aa"}], "children": [{"path": "khan/humanities/history/euro-hist/hitler-nazis/initial-rise-of-hitler-and-the-nazis/", "id": "QCkn5bu8GgM", "title": "Initial rise of Hitler and the Nazis", "kind": "Video", "slug": "initial-rise-of-hitler-and-the-nazis"}, {"path": "khan/humanities/history/euro-hist/hitler-nazis/hitler-s-beer-hall-putsch/", "id": "5qWI2pEv0wg", "title": "Hitler's Beer Hall Putsch", "kind": "Video", "slug": "hitler-s-beer-hall-putsch"}, {"path": "khan/humanities/history/euro-hist/hitler-nazis/hitler-and-the-nazis-come-to-power/", "id": "EtZnPoYbRyA", "title": "Hitler and the Nazis come to power", "kind": "Video", "slug": "hitler-and-the-nazis-come-to-power"}, {"path": "khan/humanities/history/euro-hist/hitler-nazis/night-of-the-long-knives/", "id": "ZrbbKMnPDUk", "title": "Night of the Long Knives", "kind": "Video", "slug": "night-of-the-long-knives"}, {"path": "khan/humanities/history/euro-hist/hitler-nazis/nazi-aggression-and-appeasement/", "id": "VTdV9JaHiIA", "title": "Nazi aggression and appeasement", "kind": "Video", "slug": "nazi-aggression-and-appeasement"}, {"path": "khan/humanities/history/euro-hist/hitler-nazis/adolf-hitler/", "id": "adolf-hitler", "title": "Rise of Hitler", "slug": "adolf-hitler", "kind": "Exercise"}], "in_knowledge_map": false, "description": "How did the National Socialists (Nazis) go from being a tiny, marginal party in the early 1920s to having full control of Germany and catalyzing World War II? Who was Hitler and what was his philosophy and how did he come to power?", "node_slug": "hitler-nazis", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/hitler-nazis", "extended_slug": "humanities/history/euro-hist/hitler-nazis", "kind": "Topic", "slug": "hitler-nazis"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/euro-hist/mussolini-fascism/", "id": "mussolini-fascism", "hide": false, "title": "Rise of Mussolini and Fascism", "child_data": [{"kind": "Video", "id": "xb1f745df"}, {"kind": "Video", "id": "x31d57c06"}, {"kind": "Video", "id": "xbb705332"}, {"kind": "Video", "id": "xe30684fe"}, {"kind": "Exercise", "id": "xe6cf0358"}], "children": [{"path": "khan/humanities/history/euro-hist/mussolini-fascism/fascism-and-mussolini/", "id": "AoRpWU6hHJ8", "title": "Fascism and Mussolini", "kind": "Video", "slug": "fascism-and-mussolini"}, {"path": "khan/humanities/history/euro-hist/mussolini-fascism/mussolini-becomes-prime-minister/", "id": "wxtltXz4zs0", "title": "Mussolini becomes Prime Minister", "kind": "Video", "slug": "mussolini-becomes-prime-minister"}, {"path": "khan/humanities/history/euro-hist/mussolini-fascism/mussolini-becomes-absolute-dictator-il-duce/", "id": "pT6tFia8eaY", "title": "Mussolini becomes absolute dictator (Il Duce)", "kind": "Video", "slug": "mussolini-becomes-absolute-dictator-il-duce"}, {"path": "khan/humanities/history/euro-hist/mussolini-fascism/mussolini-aligns-with-hitler/", "id": "6uNYe9UB3K4", "title": "Mussolini aligns with Hitler", "kind": "Video", "slug": "mussolini-aligns-with-hitler"}, {"path": "khan/humanities/history/euro-hist/mussolini-fascism/fascism-and-mussolini-exercise/", "id": "fascism-and-mussolini-exercise", "title": "Fascism and Mussolini", "description": "Questions about Mussolini and Fascism during the 1920s and 1930s", "slug": "fascism-and-mussolini-exercise", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The word \"Fascist\" is now a pejorative term (\"pejorative\" means \"negative\" or \"derogatory\") to describe leaders or states that have absolute control and are aggressively nationalistic.\n\nThe terms \"fascism\" and \"fascist\", however, were first embraced by Benito Mussolini in Italy in the 1920s and 1930s to describe their party and policies (that were absolutist and aggressively nationalistic). \n\nThis tutorial described Mussolini and the Fascists' rapid rise to power and the influence it had on the rest of the world (including providing a model for Hitler in Germany).", "node_slug": "mussolini-fascism", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/mussolini-fascism", "extended_slug": "humanities/history/euro-hist/mussolini-fascism", "kind": "Topic", "slug": "mussolini-fascism"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/euro-hist/china-early-1900s/", "id": "China-early-1900s", "hide": false, "title": "Overview of Chinese history 1911-1949", "child_data": [{"kind": "Video", "id": "xb94720e7"}], "children": [{"path": "khan/humanities/history/euro-hist/china-early-1900s/overview-of-chinese-history-1911-1949/", "id": "a9QtIfPIQl4", "title": "Overview of Chinese history 1911 - 1949", "kind": "Video", "slug": "overview-of-chinese-history-1911-1949"}], "in_knowledge_map": false, "description": "The early 1900s marked the end of thousands of years of dynastic imperial rule in China. It also marked the beginning of a complex period of fragmentation, civil war and fending off Japanese imperial ambitions. This tutorial covers everything from the establishment of the Republic of China by Sun Yat-sen to the Warlord Era to the Chinese Civil War between the Chiang Kai-Shek led Kuomintang and the Communists led by Mao Zedong.", "node_slug": "China-early-1900s", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/China-early-1900s", "extended_slug": "humanities/history/euro-hist/China-early-1900s", "kind": "Topic", "slug": "china-early-1900s"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/euro-hist/wo/", "id": "wo", "hide": false, "title": "Overview of World War II", "child_data": [{"kind": "Video", "id": "x6b978107"}, {"kind": "Video", "id": "x087d0a32"}, {"kind": "Video", "id": "xed749317"}, {"kind": "Video", "id": "xfffcb200"}, {"kind": "Video", "id": "x0a99a143"}, {"kind": "Video", "id": "xaf59e707"}, {"kind": "Video", "id": "x1e13ed43"}, {"kind": "Video", "id": "xec54485d"}, {"kind": "Video", "id": "xe3bfdc42"}], "children": [{"path": "khan/humanities/history/euro-hist/wo/beginning-of-world-war-ii/", "id": "-kKCjwNvNkQ", "title": "Beginning of World War II", "kind": "Video", "description": "An overview of the run up to and very beginnings of World War II.", "slug": "beginning-of-world-war-ii"}, {"path": "khan/humanities/history/euro-hist/wo/1940-axis-gains-momentum-in-world-war-ii/", "id": "Toss6Hzf5n0", "title": "1940 - Axis gains momentum in World War II", "kind": "Video", "description": "In this second video giving an overview of World War II, we see Germany and the Axis powers only continue to gain momentum in 1940.", "slug": "1940-axis-gains-momentum-in-world-war-ii"}, {"path": "khan/humanities/history/euro-hist/wo/1941-axis-momentum-accelerates-in-ww2/", "id": "X3bqQI7-sCg", "title": "1941 Axis momentum accelerates in WW2", "kind": "Video", "description": "In 1941, the Axis gains further momentum with control of most of Continential Europe. Hitler decides to break pact and invade Stalin's Soviet Union. United States enters World War II after Japanese attack on Pearl Harbor.", "slug": "1941-axis-momentum-accelerates-in-ww2"}, {"path": "khan/humanities/history/euro-hist/wo/world-war-ii-in-the-pacific-in-1942/", "id": "CBHfoQsF2Y4", "title": "World War II in the Pacific in 1942", "kind": "Video", "description": "In 1942, the United States begins to fully engage against the Japanese and go on the offensive.", "slug": "world-war-ii-in-the-pacific-in-1942"}, {"path": "khan/humanities/history/euro-hist/wo/1942-tide-turning-in-world-war-ii-in-europe/", "id": "FqGLqdk9Sr0", "title": "1942 Tide turning in World War II in Europe", "kind": "Video", "description": "In 1942 we see the Axis get pushed back in North Africa and get bogged down in the Soviet Union. The tide of war turns in favor of the Allies.", "slug": "1942-tide-turning-in-world-war-ii-in-europe"}, {"path": "khan/humanities/history/euro-hist/wo/1943-axis-losing-in-europe/", "id": "x9g82IA-IEU", "title": "1943 Axis losing in Europe", "kind": "Video", "description": "In 1943, the tide really turns in favor of the Allies in World War II. They are able to push the Axis out of N.Africa and force a surrender from Italy (along with Mussolini being deposed). The Soviets are able to start pushing the Axis out of the Soviet Union.", "slug": "1943-axis-losing-in-europe"}, {"path": "khan/humanities/history/euro-hist/wo/american-progress-in-the-pacific-in-1944/", "id": "-6XBnjFrWBg", "title": "American progress in the Pacific in 1944", "kind": "Video", "description": "In 1944, the Americans (and Allies) make even more progress in the Pacific. By the end of the year, they have taken positions that put them within bombing range of Japan.", "slug": "american-progress-in-the-pacific-in-1944"}, {"path": "khan/humanities/history/euro-hist/wo/1944-allies-advance-further-in-europe/", "id": "0UgQ0B_0hAg", "title": "1944 - Allies advance further in Europe", "kind": "Video", "description": "As we go into 1944, we see the allies land at Normandy, liberate France and face Germany in their last major counteroffensive at the Battle of the Bulge. On the Eastern Front, the Soviets end Siege of Leningrad and begin to push through Poland and Romania. In the south, Allies land in southern France and take Rome.", "slug": "1944-allies-advance-further-in-europe"}, {"path": "khan/humanities/history/euro-hist/wo/1945-end-of-world-war-ii/", "id": "U6RFAUmYU5o", "title": "1945 - End of World War II", "kind": "Video", "description": "1945 marks the end of World War II. V-E Day (Victory in Europe Day) is May 8th 1945. War doesn't end in the Pacific until August of 1945 with the atomic bombing of Hiroshima and Nagasaki.", "slug": "1945-end-of-world-war-ii"}], "in_knowledge_map": false, "description": "World War II was the bloodiest conflict in human history. Starting with the Second Sino-Japanese War (1937) and the Nazi invasion of Poland (1939) through the eventual Axis power surrenders, this tutorial walks through the major events, year by year, in both the European and Pacific Arenas.", "node_slug": "wo", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/wo", "extended_slug": "humanities/history/euro-hist/wo", "kind": "Topic", "slug": "wo"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/euro-hist/cold-war/", "id": "cold-war", "hide": false, "title": "The Cold War", "child_data": [{"kind": "Video", "id": "80071249"}, {"kind": "Video", "id": "80071250"}, {"kind": "Video", "id": "72691931"}, {"kind": "Video", "id": "72691932"}, {"kind": "Video", "id": "71742706"}, {"kind": "Video", "id": "82398329"}, {"kind": "Video", "id": "80735998"}], "children": [{"path": "khan/humanities/history/euro-hist/cold-war/communism/", "id": "MmRgMAZyYN0", "title": "Communism", "kind": "Video", "description": "Overview of Communism and Marxist-Leninist States", "slug": "communism"}, {"path": "khan/humanities/history/euro-hist/cold-war/korean-war-overview/", "id": "MEGyRgYJKEY", "title": "Korean War overview", "kind": "Video", "description": "Korean War Overview", "slug": "korean-war-overview"}, {"path": "khan/humanities/history/euro-hist/cold-war/bay-of-pigs-invasion/", "id": "XmkbAduMD_E", "title": "Bay of Pigs Invasion", "kind": "Video", "description": "Bay of Pigs Invasion", "slug": "bay-of-pigs-invasion"}, {"path": "khan/humanities/history/euro-hist/cold-war/cuban-missile-crisis/", "id": "VO40SpSBjbc", "title": "Cuban Missile Crisis", "kind": "Video", "description": "Overview of the Cuban Missile Crisis", "slug": "cuban-missile-crisis"}, {"path": "khan/humanities/history/euro-hist/cold-war/vietnam-war/", "id": "9e9GWdT2pEQ", "title": "Vietnam War", "kind": "Video", "description": "Overview of the Vietnam War", "slug": "vietnam-war"}, {"path": "khan/humanities/history/euro-hist/cold-war/allende-and-pinochet-in-chile/", "id": "Um92GZLCQ_Q", "title": "Allende and Pinochet in Chile", "kind": "Video", "description": "Outline of the 1973 Allende Coup in Chile and Pinochet's Junta (this video under CC-BY-SA)", "slug": "allende-and-pinochet-in-chile"}, {"path": "khan/humanities/history/euro-hist/cold-war/pattern-of-us-cold-war-interventions/", "id": "aNkrawaaiZQ", "title": "Pattern of US Cold War interventions", "kind": "Video", "description": "Comparing the patterns of Korea, Cuba and Vietnam", "slug": "pattern-of-us-cold-war-interventions"}], "in_knowledge_map": false, "description": "The cold war between the United States and the Soviet and their respective allies never involved direct conflict (which might have ended the world). Instead, it involved posturing, brinksmanship and proxy wars in far-flung regions of the world.", "node_slug": "cold-war", "render_type": "Tutorial", "topic_page_url": "/humanities/history/euro-hist/cold-war", "extended_slug": "humanities/history/euro-hist/cold-war", "kind": "Topic", "slug": "cold-war"}], "in_knowledge_map": false, "description": "You cannot properly understand current world events without understanding the history of the 20th Century. This topic takes us on a journey from the end of Imperialism through two world wars and the Cold War and brings us to our modern world.", "node_slug": "euro-hist", "render_type": "Topic", "topic_page_url": "/humanities/history/euro-hist", "extended_slug": "humanities/history/euro-hist", "kind": "Topic", "slug": "euro-hist"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/history/1600s-1800s/", "id": "1600s-1800s", "hide": false, "title": "1700-1900: Enlightenment and Revolution", "child_data": [{"kind": "Topic", "id": "x9ef98283"}, {"kind": "Topic", "id": "xfcff90a6"}, {"kind": "Topic", "id": "x3ec6f02d"}, {"kind": "Topic", "id": "x5e87cf09"}, {"kind": "Topic", "id": "x1edbf39e"}, {"kind": "Topic", "id": "xf4f66331"}, {"kind": "Topic", "id": "x2450fdc0"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/1600s-1800s/declaration-of-independence/", "id": "declaration-of-independence", "hide": false, "title": "US Declaration of Independence", "child_data": [{"kind": "Video", "id": "xd05daf08"}, {"kind": "Video", "id": "xfc9658aa"}, {"kind": "Video", "id": "x4e15c22e"}, {"kind": "Video", "id": "x1f965988"}, {"kind": "Video", "id": "x8dab990d"}, {"kind": "Video", "id": "x297fc323"}, {"kind": "Exercise", "id": "x7594341a"}], "children": [{"path": "khan/humanities/history/1600s-1800s/declaration-of-independence/background-and-introduction-to-the-united-states-declaration-of-independence/", "id": "er1L9BB6UoE", "title": "Background and introduction to the United States Declaration of Independence", "kind": "Video", "description": "In this video, Aspen Institute President and CEO Walter Isaacson talks to Sal about the background to the Declaration of Independence.", "slug": "background-and-introduction-to-the-united-states-declaration-of-independence"}, {"path": "khan/humanities/history/1600s-1800s/declaration-of-independence/all-men-are-created-equal/", "id": "uhXLW4bU-pI", "title": "All men are created equal", "kind": "Video", "description": "In this video, Aspen Institute President and CEO Walter Isaacson\u00a0talks to Sal about \u00a0the Declaration of Independence.", "slug": "all-men-are-created-equal"}, {"path": "khan/humanities/history/1600s-1800s/declaration-of-independence/life-liberty-and-the-pursuit-of-happiness/", "id": "S7SnU8ujfwM", "title": "Life, liberty and the pursuit of happiness", "kind": "Video", "description": "In this video, Aspen Institute President and CEO Walter Isaacson\u00a0talks to Sal about \u00a0the Declaration of Independence.", "slug": "life-liberty-and-the-pursuit-of-happiness"}, {"path": "khan/humanities/history/1600s-1800s/declaration-of-independence/tyranny-and-despotism/", "id": "-7kSDHFXwZ4", "title": "Tyranny and despotism", "kind": "Video", "description": "In this video, Aspen Institute President and CEO Walter Isaacson\u00a0talks to Sal about \u00a0the Declaration of Independence.", "slug": "tyranny-and-despotism"}, {"path": "khan/humanities/history/1600s-1800s/declaration-of-independence/first-draft-of-the-declaration-of-independence/", "id": "_NB5-Z0pOyc", "title": "First draft of the Declaration of Independence", "kind": "Video", "description": "In this video, Aspen Institute President and CEO Walter Isaacson\u00a0talks to Sal about \u00a0the Declaration of Independence.", "slug": "first-draft-of-the-declaration-of-independence"}, {"path": "khan/humanities/history/1600s-1800s/declaration-of-independence/birth-of-the-us-constitution/", "id": "Rk8dCnKIfP4", "title": "Birth of the US Constitution", "kind": "Video", "description": "In this video, Aspen Institute President and CEO Walter Isaacson\u00a0talks to Sal about \u00a0the Declaration of Independence.", "slug": "birth-of-the-us-constitution"}, {"path": "khan/humanities/history/1600s-1800s/declaration-of-independence/aspen-us-declaration-of-independence-quiz/", "id": "aspen-us-declaration-of-independence-quiz", "title": "US Declaration of Independence Quiz", "description": "Questions on the US Declaration of Independence", "slug": "aspen-us-declaration-of-independence-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial Walter Isaacson walks Sal through the United States Declaration of Independence. In doing so, they discuss the philosophical underpinnings of the American Revolution and the United States in general.\n\nWalter Isaacson is the President and CEO of the Aspen Institute. He is the former CEO and Chairman of CNN and Managing Editor of Time Magazine. He has written best-selling biographies of Steve Jobs, Benjamin Franklin, Albert Einstein and Henry Kissinger.", "node_slug": "declaration-of-independence", "render_type": "Tutorial", "topic_page_url": "/humanities/history/1600s-1800s/declaration-of-independence", "extended_slug": "humanities/history/1600s-1800s/declaration-of-independence", "kind": "Topic", "slug": "declaration-of-independence"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/1600s-1800s/french-revolution-tutorial/", "id": "french-revolution-tutorial", "hide": false, "title": "French Revolution", "child_data": [{"kind": "Video", "id": "25175"}, {"kind": "Video", "id": "25177"}, {"kind": "Video", "id": "25179"}, {"kind": "Video", "id": "25181"}], "children": [{"path": "khan/humanities/history/1600s-1800s/french-revolution-tutorial/french-revolution-part-1/", "id": "BDWqwcTtZa0", "title": "French Revolution (part 1)", "kind": "Video", "description": "Part 1 of the French Revolution. From the Convocation of the Estates General to the storming of the Bastille", "slug": "french-revolution-part-1"}, {"path": "khan/humanities/history/1600s-1800s/french-revolution-tutorial/french-revolution-part-2/", "id": "0t4MF9ZoppM", "title": "French Revolution (part 2)", "kind": "Video", "description": "Royals try to escape. Champ De Mars Massacre. Declaration of Pillnitz. Movement towards becoming a Republic.", "slug": "french-revolution-part-2"}, {"path": "khan/humanities/history/1600s-1800s/french-revolution-tutorial/french-revolution-part-3-reign-of-terror/", "id": "BZmtnCqTWik", "title": "French Revolution (part 3) - Reign of Terror", "kind": "Video", "description": "The Reign of Terror", "slug": "french-revolution-part-3-reign-of-terror"}, {"path": "khan/humanities/history/1600s-1800s/french-revolution-tutorial/french-revolution-part-4-the-rise-of-napoleon-bonaparte/", "id": "KYoB2mjNdr0", "title": "French Revolution (part 4) - The Rise of Napoleon Bonaparte", "kind": "Video", "description": "The rise of Napoleon Bonaparte", "slug": "french-revolution-part-4-the-rise-of-napoleon-bonaparte"}], "in_knowledge_map": false, "description": "\"Let them eat cake!\" \"No, how about we cut your head off instead!\" \n\nThe French Revolution was ugly, bloody and idealistic. This tutorial covers the beginning of the end of the Bourbon rule (actually doesn't really go away for 60 years) and birth of France as a Republic (which will really take about 80 years).", "node_slug": "french-revolution-tutorial", "render_type": "Tutorial", "topic_page_url": "/humanities/history/1600s-1800s/french-revolution-tutorial", "extended_slug": "humanities/history/1600s-1800s/french-revolution-tutorial", "kind": "Topic", "slug": "french-revolution-tutorial"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/", "id": "napoleon-bonaparte", "hide": false, "title": "Napoleon Bonaparte", "child_data": [{"kind": "Video", "id": "25181"}, {"kind": "Video", "id": "25187"}, {"kind": "Video", "id": "25189"}, {"kind": "Video", "id": "25191"}, {"kind": "Video", "id": "25193"}, {"kind": "Video", "id": "27843"}, {"kind": "Video", "id": "25195"}, {"kind": "Video", "id": "1081957510"}], "children": [{"path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/french-revolution-part-4-the-rise-of-napoleon-bonaparte/", "id": "KYoB2mjNdr0", "title": "French Revolution (part 4) - The Rise of Napoleon Bonaparte", "kind": "Video", "description": "The rise of Napoleon Bonaparte", "slug": "french-revolution-part-4-the-rise-of-napoleon-bonaparte"}, {"path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/napoleon-and-the-wars-of-the-first-and-second-coalitions/", "id": "OzyH-1p9nAg", "title": "Napoleon and the Wars of the First and Second Coalitions", "kind": "Video", "description": "Overview of the first two coalitions against France and Napoleon's roles in them.", "slug": "napoleon-and-the-wars-of-the-first-and-second-coalitions"}, {"path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/napoleon-and-the-war-of-the-third-coalition/", "id": "yogD_-Op4Wc", "title": "Napoleon and the War of the Third Coalition", "kind": "Video", "description": "Napoleon leads France to become the dominant power in Europe. Napoleon I becomes Emperor of France.", "slug": "napoleon-and-the-war-of-the-third-coalition"}, {"path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/napoleon-and-the-war-of-the-fourth-coalition/", "id": "O3HxPDH-s7w", "title": "Napoleon and the War of the Fourth Coalition", "kind": "Video", "description": "Napoleon takes on Prussia and Russia and wins again", "slug": "napoleon-and-the-war-of-the-fourth-coalition"}, {"path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/napoleon-s-peninsular-campaigns/", "id": "ALJGz4r_VF0", "title": "Napoleon's Peninsular Campaigns", "kind": "Video", "description": "French forces get embroiled in the Iberian Peninsula", "slug": "napoleon-s-peninsular-campaigns"}, {"path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/french-invasion-of-russia/", "id": "F_ySQvjtAxQ", "title": "French invasion of Russia", "kind": "Video", "description": "Napoleon's disastrous invasion of Russia", "slug": "french-invasion-of-russia"}, {"path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/napoleon-forced-to-abdicate/", "id": "CH6FQhlZn6k", "title": "Napoleon forced to abdicate", "kind": "Video", "description": "The Sixth Coalition forces Napoleon into exile on Elba", "slug": "napoleon-forced-to-abdicate"}, {"path": "khan/humanities/history/1600s-1800s/napoleon-bonaparte/hundred-days-and-waterloo/", "id": "ufymsKi9S3U", "title": "Hundred days and Waterloo", "kind": "Video", "description": "Napoleon's escapes from Elba and retakes control only to be defeated at Waterloo", "slug": "hundred-days-and-waterloo"}], "in_knowledge_map": false, "description": "A man with such a huge \"Napoleonic complex\", that they named it after him. A military genius with a ginormous ego, some people consider him a hero or a tyrant or both.\n\nFrance has successfully overthrown Louis XVI in 1789. It has gone through a many-year period of bloodshed and instability. The monarch's of Europe are not happy about this \"overthrow-your-king\" business. A 5'6'' Corsican establishes himself as a strong military tactician during the wars with other European powers and soon comes to power in France.\n\nThis tutorial covers the rise and fall of one of the most famous men in all of history: Napoleon Bonaparte (Napoleon I).", "node_slug": "napoleon-bonaparte", "render_type": "Tutorial", "topic_page_url": "/humanities/history/1600s-1800s/napoleon-bonaparte", "extended_slug": "humanities/history/1600s-1800s/napoleon-bonaparte", "kind": "Topic", "slug": "napoleon-bonaparte"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/1600s-1800s/many-french-revolutions/", "id": "many-french-revolutions", "hide": false, "title": "France's many revolutions and republics", "child_data": [{"kind": "Video", "id": "1272067996"}], "children": [{"path": "khan/humanities/history/1600s-1800s/many-french-revolutions/les-miserables-and-france-s-many-revolutions/", "id": "I4iwhvDhvKE", "title": "Les Miserables and France's many revolutions", "kind": "Video", "description": "Overview of early 19th century French history and context for Les Miserables", "slug": "les-miserables-and-france-s-many-revolutions"}], "in_knowledge_map": false, "description": "Unlike the American Revolution which fairly cleanly transitioned the United States from British rule to a republic, France's process of democratization was much longer and more painful. This tutorial gives a scaffold of that (and gives some context for the book/musical/movie \"Les Miserables\").", "node_slug": "many-french-revolutions", "render_type": "Tutorial", "topic_page_url": "/humanities/history/1600s-1800s/many-french-revolutions", "extended_slug": "humanities/history/1600s-1800s/many-french-revolutions", "kind": "Topic", "slug": "many-french-revolutions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/1600s-1800s/haitian-revolution/", "id": "haitian-revolution", "hide": false, "title": "Haitian Revolution", "child_data": [{"kind": "Video", "id": "25183"}, {"kind": "Video", "id": "25185"}], "children": [{"path": "khan/humanities/history/1600s-1800s/haitian-revolution/haitian-revolution-part-1/", "id": "Qz5zFzvbib4", "title": "Haitian Revolution (Part 1)", "kind": "Video", "description": "Slaves rebel in Saint-Domingue (Haiti). Rise of Toussaint L'Ouverture.", "slug": "haitian-revolution-part-1"}, {"path": "khan/humanities/history/1600s-1800s/haitian-revolution/haitian-revolution-part-2/", "id": "gU-5bjpAPmA", "title": "Haitian Revolution (Part 2)", "kind": "Video", "description": "Dessalines takes on Leclerc and Rochambeau", "slug": "haitian-revolution-part-2"}], "in_knowledge_map": false, "description": "Yes, you are right. Haiti is not in Europe. We put the tutorial here because it was a French colony and its own revolution is closely linked to that of France's.\n\nPossibly one of the saddest histories that a nation can have, this tutorial tries to give as much context as possible for the birth of Haiti.", "node_slug": "haitian-revolution", "render_type": "Tutorial", "topic_page_url": "/humanities/history/1600s-1800s/haitian-revolution", "extended_slug": "humanities/history/1600s-1800s/haitian-revolution", "kind": "Topic", "slug": "haitian-revolution"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/1600s-1800s/benjamin-franklin/", "id": "benjamin-franklin", "hide": false, "title": "Life of Benjamin Franklin", "child_data": [{"kind": "Video", "id": "xd428285e"}, {"kind": "Video", "id": "x3e0e79e1"}, {"kind": "Video", "id": "x85370778"}, {"kind": "Video", "id": "xcf902a35"}, {"kind": "Video", "id": "x159aff59"}, {"kind": "Video", "id": "x66f6745d"}, {"kind": "Video", "id": "x0e5d769a"}, {"kind": "Exercise", "id": "x00f37d21"}], "children": [{"path": "khan/humanities/history/1600s-1800s/benjamin-franklin/franklin-overview/", "id": "e23FYcmAG5k", "title": "An introduction to Benjamin Franklin", "kind": "Video", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson present an overview of Benjamin Franklin's life.", "slug": "franklin-overview"}, {"path": "khan/humanities/history/1600s-1800s/benjamin-franklin/benjamin-franklin-writer/", "id": "yA-NYmO8dDk", "title": "Benjamin Franklin becomes a writer", "kind": "Video", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson discuss Benjamin Franklin the writer.", "slug": "benjamin-franklin-writer"}, {"path": "khan/humanities/history/1600s-1800s/benjamin-franklin/poor-richard/", "id": "8jV1SwpZ-W4", "title": "Benjamin Franklin and Poor Richard's Almanac", "kind": "Video", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson discuss Benjamin Franklin's\u00a0Poor Richard's Almanac.", "slug": "poor-richard"}, {"path": "khan/humanities/history/1600s-1800s/benjamin-franklin/franklin-civic-leader/", "id": "h05d7Mbd3UI", "title": "Benjamin Franklin the civic leader", "kind": "Video", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson discuss Benjamin Franklin as a civic leader.", "slug": "franklin-civic-leader"}, {"path": "khan/humanities/history/1600s-1800s/benjamin-franklin/benjamin-franklin-inventor/", "id": "uGjR338bHPs", "title": "Benjamin Franklin the inventor", "kind": "Video", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson discuss Benjamin Franklin as an inventor.", "slug": "benjamin-franklin-inventor"}, {"path": "khan/humanities/history/1600s-1800s/benjamin-franklin/franklin-diplomat/", "id": "Ewithks6nD4", "title": "Benjamin Franklin as diplomat", "kind": "Video", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson discuss Benjamin Franklin as a diplomat.", "slug": "franklin-diplomat"}, {"path": "khan/humanities/history/1600s-1800s/benjamin-franklin/franklin-takeaways/", "id": "vbAbCp9elFU", "title": "Takeaways from Benjamin Franklin's life", "kind": "Video", "description": "In this video, Sal and Aspen Institute President and CEO Walter Isaacson discuss takeaways from Benjamin Franklin's life.", "slug": "franklin-takeaways"}, {"path": "khan/humanities/history/1600s-1800s/benjamin-franklin/benjamin-franklin-quiz/", "id": "benjamin-franklin-quiz", "title": "Benjamin Franklin Quiz", "description": "Students can test their knowledge of Benjamin Franklin's life with this quiz.", "slug": "benjamin-franklin-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In many ways, Benjamin Franklin is the \"Founding Father\" of the United States of America that best represent many ideals of the country. In this series with Walter Isaacson, we go into the life and philosophy of Franklin.", "node_slug": "benjamin-franklin", "render_type": "Tutorial", "topic_page_url": "/humanities/history/1600s-1800s/benjamin-franklin", "extended_slug": "humanities/history/1600s-1800s/benjamin-franklin", "kind": "Topic", "slug": "benjamin-franklin"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/1600s-1800s/slavery-and-the-civil-war/", "id": "slavery-and-the-civil-war", "hide": false, "title": "Slavery and the Civil War in the United States", "child_data": [{"kind": "Video", "id": "x39c5b919"}, {"kind": "Video", "id": "x0e93ac27"}, {"kind": "Video", "id": "x8fa427b5"}, {"kind": "Video", "id": "xf65d52d9"}, {"kind": "Video", "id": "x640405b2"}, {"kind": "Video", "id": "xd5b36262"}, {"kind": "Article", "id": "x0776c43b"}], "children": [{"path": "khan/humanities/history/1600s-1800s/slavery-and-the-civil-war/slavery-and-missouri-compromise-in-early-1800s/", "id": "d9hQk2Mmpcw", "title": "Slavery and Missouri Compromise in early 1800s", "kind": "Video", "description": "Kim Kutz explains how slavery was an issue at the birth of the United States and how the issue became more and more central as the country expanded.", "slug": "slavery-and-missouri-compromise-in-early-1800s"}, {"path": "khan/humanities/history/1600s-1800s/slavery-and-the-civil-war/increasing-political-battles-over-slavery-in-mid-1800s/", "id": "09YsW2U-7kw", "title": "Increasing political battles over slavery in mid 1800s", "kind": "Video", "description": "Kim and Sal talk about increased tensions between slave and free states as new territory is added after Mexican-American War and from Compromise of 1850 (especially Fugitive Slave Act).", "slug": "increasing-political-battles-over-slavery-in-mid-1800s"}, {"path": "khan/humanities/history/1600s-1800s/slavery-and-the-civil-war/start-of-the-civil-war/", "id": "Dl0RRDiG6O8", "title": "Start of the Civil War", "kind": "Video", "description": "From Lincoln's election to the formation of the Confederacy and Fort Sumter.", "slug": "start-of-the-civil-war"}, {"path": "khan/humanities/history/1600s-1800s/slavery-and-the-civil-war/strategy-of-the-civil-war/", "id": "L87VpmRLAPg", "title": "Strategy of the Civil War", "kind": "Video", "description": "Strategy of the Civil War. The advantages and disadvantages of the North and South in the American Civil War.", "slug": "strategy-of-the-civil-war"}, {"path": "khan/humanities/history/1600s-1800s/slavery-and-the-civil-war/early-phases-of-civil-war-and-antietam/", "id": "01crUV4VSkk", "title": "Early phases of Civil War and Antietam", "kind": "Video", "description": "Early phases of Civil War and Antietam", "slug": "early-phases-of-civil-war-and-antietam"}, {"path": "khan/humanities/history/1600s-1800s/slavery-and-the-civil-war/emancipation-proclamation/", "id": "fYXqj_UPsXg", "title": "Emancipation Proclamation", "kind": "Video", "description": "Emancipation Proclamation", "slug": "emancipation-proclamation"}], "in_knowledge_map": false, "description": "The end of slavery. The beginning of a new era. The biggest conflict ever to happen on American soil. What caused the Civil War and how did it change the United States?", "node_slug": "slavery-and-the-civil-war", "render_type": "Tutorial", "topic_page_url": "/humanities/history/1600s-1800s/slavery-and-the-civil-war", "extended_slug": "humanities/history/1600s-1800s/slavery-and-the-civil-war", "kind": "Topic", "slug": "slavery-and-the-civil-war"}], "in_knowledge_map": false, "description": "Do we need kings? Can people govern themselves? What rights do we all have? Can science and understanding uplift all of humanity?\n\nThis topic lays the foundation for our modern thinking about the world. From democratic revolutions to the establishment of empires backed by industrial power.", "node_slug": "1600s-1800s", "render_type": "Topic", "topic_page_url": "/humanities/history/1600s-1800s", "extended_slug": "humanities/history/1600s-1800s", "kind": "Topic", "slug": "1600s-1800s"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/history/1500-1600-renaissance-reformation/", "id": "1500-1600-Renaissance-Reformation", "hide": false, "title": "1500-1600: Renaissance and Reformation", "child_data": [{"kind": "Topic", "id": "x976876a8"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/history/1500-1600-renaissance-reformation/protestant-reformation/", "id": "protestant-reformation", "hide": false, "title": "The Protestant Reformation", "child_data": [{"kind": "Article", "id": "xbdcfe503"}, {"kind": "Video", "id": "xb1a832b2"}, {"kind": "Video", "id": "x20184df0"}, {"kind": "Video", "id": "xf4983822"}, {"kind": "Video", "id": "x66fe4fa1"}, {"kind": "Article", "id": "xd7adc116"}, {"kind": "Exercise", "id": "x452d04e4"}, {"kind": "Article", "id": "x892579e3"}, {"kind": "Exercise", "id": "x7829049c"}], "children": [{"path": "khan/humanities/history/1500-1600-renaissance-reformation/protestant-reformation/protestant-reformation-1/", "id": "qTGJMnTWrrw", "title": "Introduction to the Protestant Reformation: Setting the stage (part 1)", "kind": "Video", "description": "Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "protestant-reformation-1"}, {"path": "khan/humanities/history/1500-1600-renaissance-reformation/protestant-reformation/introduction-to-the-protestant-reformation-luther-2-of-4/", "id": "dSOnLt3YVl0", "title": "Introduction to the Protestant Reformation: Martin Luther (part 2)", "kind": "Video", "description": "An Introduction to the Protestant Reformation: Martin Luther (2 of 4) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "introduction-to-the-protestant-reformation-luther-2-of-4"}, {"path": "khan/humanities/history/1500-1600-renaissance-reformation/protestant-reformation/introduction-to-the-protestant-reformation-3-of-4/", "id": "F6ZsIyKHTNI", "title": "Introduction to the Protestant Reformation: Varieties of Protestantism (part 3)", "kind": "Video", "description": "An Introduction to the Protestant Reformation: Varieties of Protestantism (3 of 4)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "introduction-to-the-protestant-reformation-3-of-4"}, {"path": "khan/humanities/history/1500-1600-renaissance-reformation/protestant-reformation/introduction-to-the-protestant-reformation-the-counter-reformation-4-of-4/", "id": "C6PUlTYnxLY", "title": "Introduction to the Protestant Reformation: The Counter-Reformation (part 4)", "kind": "Video", "description": "Introduction to the Protestant Reformation: The Counter-Reformation (4 of 4) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "introduction-to-the-protestant-reformation-the-counter-reformation-4-of-4"}, {"path": "khan/humanities/history/1500-1600-renaissance-reformation/protestant-reformation/protestant-reformation-quiz/", "id": "protestant-reformation-quiz", "title": "Protestant Reformation quiz", "description": "Test your comprehension of the political and religious issues of the Reformation and Counter-Reformation.", "slug": "protestant-reformation-quiz", "kind": "Exercise"}, {"path": "khan/humanities/history/1500-1600-renaissance-reformation/protestant-reformation/cranach-s-law-and-gospel-quiz/", "id": "cranach-s-law-and-gospel-quiz", "title": "Cranach, Law and Gospel (quiz)", "description": "Test your knowledge.", "slug": "cranach-s-law-and-gospel-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In 1517 a German theologian and monk, Martin Luther, challenged the authority of the Pope and sparked the Protestant Reformation. His ideas spread quickly, thanks in part to the printing press. By challenging the power of the Church, and asserting the authority of individual conscience (it was increasingly possible for people to read the bible in the language that they spoke), the Reformation laid the foundation for the value that modern culture places on the individual.", "node_slug": "protestant-reformation", "render_type": "Tutorial", "topic_page_url": "/humanities/history/1500-1600-Renaissance-Reformation/protestant-reformation", "extended_slug": "humanities/history/1500-1600-Renaissance-Reformation/protestant-reformation", "kind": "Topic", "slug": "protestant-reformation"}], "in_knowledge_map": false, "description": "A tutorial about the Protestant Reformation", "node_slug": "1500-1600-Renaissance-Reformation", "render_type": "Topic", "topic_page_url": "/humanities/history/1500-1600-Renaissance-Reformation", "extended_slug": "humanities/history/1500-1600-Renaissance-Reformation", "kind": "Topic", "slug": "1500-1600-renaissance-reformation"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/history/ancient-medieval/", "id": "ancient-medieval", "hide": false, "title": "Before 1300: Ancient and Medieval history", "child_data": [{"kind": "Topic", "id": "xdd90c467"}, {"kind": "Topic", "id": "x514b7b52"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/ancient-medieval/ancient/", "id": "Ancient", "hide": false, "title": "Ancient", "child_data": [{"kind": "Video", "id": "820630129"}, {"kind": "Video", "id": "671459930"}, {"kind": "Video", "id": "785318223"}, {"kind": "Video", "id": "1064657948"}], "children": [{"path": "khan/humanities/history/ancient-medieval/ancient/standard-of-ur-c-2600-2400-b-c-e/", "id": "Nok4cBt0V6w", "title": "Standard of Ur from the Royal Tombs at Ur", "kind": "Video", "description": "Standard of Ur, c. 2600-2400 B.C.E., 21.59 x 49.5 x 12 cm (British Museum) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "standard-of-ur-c-2600-2400-b-c-e"}, {"path": "khan/humanities/history/ancient-medieval/ancient/rosetta-stone-196-b-c-e/", "id": "OFXY9-pec1I", "title": "Ptolemaic: Rosetta Stone", "kind": "Video", "description": "Rosetta Stone, 196 B.C.E., granite, 114.4 cm x 72.3 x 27.9 cm or 45 x 28.5 x 11 inches, Ptolemaic Period (British Museum, London). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "rosetta-stone-196-b-c-e"}, {"path": "khan/humanities/history/ancient-medieval/ancient/a-tour-through-ancient-rome-in-320-c-e/", "id": "e_phjB19ZEg", "title": "Ancient Rome", "kind": "Video", "description": "A project between Khan Academy and Rome Reborn - with Dr. Bernard Frischer", "slug": "a-tour-through-ancient-rome-in-320-c-e"}, {"path": "khan/humanities/history/ancient-medieval/ancient/ara-pacis-augustae-altar-of-augustan-peace-13-9-b-c-e-rome/", "id": "kiMNT18c4Ko", "title": "Ara Pacis", "kind": "Video", "description": "Ara Pacis Augustae (Altar of Augustan Peace), 13-9 B.C.E.Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "ara-pacis-augustae-altar-of-augustan-peace-13-9-b-c-e-rome"}], "in_knowledge_map": false, "description": "This tutorial includes the Ancient Near East, and Ancient Greece and Rome.", "node_slug": "Ancient", "render_type": "Tutorial", "topic_page_url": "/humanities/history/ancient-medieval/Ancient", "extended_slug": "humanities/history/ancient-medieval/Ancient", "kind": "Topic", "slug": "ancient"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/ancient-medieval/medieval/", "id": "medieval", "hide": false, "title": "Medieval", "child_data": [{"kind": "Video", "id": "669432578"}, {"kind": "Video", "id": "x60cdbb94"}, {"kind": "Video", "id": "x5c43baef"}, {"kind": "Article", "id": "xfb599972"}, {"kind": "Article", "id": "x8b475e3a"}, {"kind": "Article", "id": "x7b5047d2"}, {"kind": "Article", "id": "x086bdd4e"}], "children": [{"path": "khan/humanities/history/ancient-medieval/medieval/sutton-hoo-ship-burial-c-700/", "id": "dWxcQZBM3eQ", "title": "Sutton Hoo ship burial", "kind": "Video", "description": "Sutton Hoo Ship Burial, c. 700 (British Museum, London)\n\nMultiple bronze, gold and silver objects of Anglo Saxon origin, found in Suffolk, England, including: a helmet, sceptre, sword, hanging bowl, bowls and spoons, shoulder clasps, a belt buckle, and purse lid.\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "sutton-hoo-ship-burial-c-700"}, {"path": "khan/humanities/history/ancient-medieval/medieval/charlemagne-an-introduction/", "id": "j4PI8dEWTGE", "title": "Charlemagne: An introduction (1 of 2)", "kind": "Video", "description": "Brief overview of Charlemagne and his coronation in 800.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "charlemagne-an-introduction"}, {"path": "khan/humanities/history/ancient-medieval/medieval/charlemagne-and-the-carolingian-revival/", "id": "pyDPJENZOs0", "title": "Charlemagne and the Carolingian revival (2 of 2)", "kind": "Video", "description": "A brief introduction to Charlemagne's military campaigns and the cultural revival that he supported. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "charlemagne-and-the-carolingian-revival"}], "in_knowledge_map": false, "description": "", "node_slug": "medieval", "render_type": "Tutorial", "topic_page_url": "/humanities/history/ancient-medieval/medieval", "extended_slug": "humanities/history/ancient-medieval/medieval", "kind": "Topic", "slug": "medieval"}], "in_knowledge_map": false, "description": "", "node_slug": "ancient-medieval", "render_type": "Topic", "topic_page_url": "/humanities/history/ancient-medieval", "extended_slug": "humanities/history/ancient-medieval", "kind": "Topic", "slug": "ancient-medieval"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/history/history-survey/", "id": "history-survey", "hide": false, "title": "Surveys of history", "child_data": [{"kind": "Topic", "id": "xc6da62b5"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/history-survey/us-history/", "id": "us-history", "hide": false, "title": "United States history overview", "child_data": [{"kind": "Video", "id": "68328865"}, {"kind": "Video", "id": "69753333"}, {"kind": "Video", "id": "69753334"}, {"kind": "Video", "id": "109569203"}, {"kind": "Video", "id": "80071251"}, {"kind": "Video", "id": "80071252"}], "children": [{"path": "khan/humanities/history/history-survey/us-history/us-history-overview-1-jamestown-to-the-civil-war/", "id": "ghgPq2wjQUQ", "title": "US History Overview 1: Jamestown to the Civil War", "kind": "Video", "description": "Jamestown to the Civil War", "slug": "us-history-overview-1-jamestown-to-the-civil-war"}, {"path": "khan/humanities/history/history-survey/us-history/us-history-overview-2-reconstruction-to-the-great-depression/", "id": "zmBV87XA52Q", "title": "US History overview 2: Reconstruction to the Great Depression", "kind": "Video", "description": "Reconstruction to the Great Depression", "slug": "us-history-overview-2-reconstruction-to-the-great-depression"}, {"path": "khan/humanities/history/history-survey/us-history/us-history-overview-3-wwii-to-vietnam/", "id": "j2eKaxU-8kA", "title": "US History overview 3: WWII to Vietnam", "kind": "Video", "description": "World War II, Hitler, Cold War, Bay of Pigs, Cuban Missile Crisis and the Space Race", "slug": "us-history-overview-3-wwii-to-vietnam"}, {"path": "khan/humanities/history/history-survey/us-history/appomattox-court-house-and-lincoln-s-assassination/", "id": "Frpq_A7Ky_Q", "title": "Appomattox court house and Lincoln's assassination", "kind": "Video", "description": "From Lee's Surrender to Grant to Lincoln's Assassination", "slug": "appomattox-court-house-and-lincoln-s-assassination"}, {"path": "khan/humanities/history/history-survey/us-history/when-capitalism-is-great-and-not-so-great/", "id": "8NJEeEUUhaI", "title": "When Capitalism is great and not-so-great", "kind": "Video", "description": "Understanding when capitalism can potentially undermine innovation, competition and merit", "slug": "when-capitalism-is-great-and-not-so-great"}, {"path": "khan/humanities/history/history-survey/us-history/20th-century-capitalism-and-regulation-in-the-united-states/", "id": "J33nVRyTeyU", "title": "20th Century capitalism and regulation in the United States", "kind": "Video", "description": "Overview of cycles of regulation, de-regulation and government in 20th century US capitalism", "slug": "20th-century-capitalism-and-regulation-in-the-united-states"}], "in_knowledge_map": false, "description": "", "node_slug": "us-history", "render_type": "Tutorial", "topic_page_url": "/humanities/history/history-survey/us-history", "extended_slug": "humanities/history/history-survey/us-history", "kind": "Topic", "slug": "us-history"}], "in_knowledge_map": false, "description": "The tutorials in this topic will take you on sweeping journeys through time so that you can get the really BIG picture for how things fit together.", "node_slug": "history-survey", "render_type": "Topic", "topic_page_url": "/humanities/history/history-survey", "extended_slug": "humanities/history/history-survey", "kind": "Topic", "slug": "history-survey"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/history/american-civics/", "id": "American civics", "hide": false, "title": "American civics", "child_data": [{"kind": "Topic", "id": "xd23db0ab"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/american-civics/american-civics/", "id": "american-civics", "hide": false, "title": "American civics", "child_data": [{"kind": "Video", "id": "887553535"}, {"kind": "Video", "id": "1184640213"}, {"kind": "Video", "id": "1184595421"}, {"kind": "Video", "id": "225139729"}, {"kind": "Video", "id": "225139731"}, {"kind": "Video", "id": "225139727"}, {"kind": "Video", "id": "225139728"}, {"kind": "Video", "id": "225139732"}, {"kind": "Video", "id": "225139733"}, {"kind": "Video", "id": "225139730"}, {"kind": "Video", "id": "508919772"}, {"kind": "Video", "id": "1163976627"}, {"kind": "Video", "id": "1163627770"}, {"kind": "Video", "id": "xccc7fc57"}], "children": [{"path": "khan/humanities/history/american-civics/american-civics/ppaca-or-obamacare/", "id": "8nW9L7cSop4", "title": "PPACA or \"Obamacare\"", "kind": "Video", "description": "Basic overview of what is sometimes referred to as \"Obamacare\"", "slug": "ppaca-or-obamacare"}, {"path": "khan/humanities/history/american-civics/american-civics/the-fiscal-cliff/", "id": "lV3LBiivTxw", "title": "The fiscal cliff", "kind": "Video", "description": "Sal compares the possible outcomes of the federal budget negotiations around the \"fiscal cliff.\"", "slug": "the-fiscal-cliff"}, {"path": "khan/humanities/history/american-civics/american-civics/more-fiscal-cliff-analysis/", "id": "QwvJ6z49m-c", "title": "More fiscal cliff analysis", "kind": "Video", "description": "A bit more in-depth analysis when thinking about the fiscal cliff.", "slug": "more-fiscal-cliff-analysis"}, {"path": "khan/humanities/history/american-civics/american-civics/electoral-college/", "id": "oTbvYGH_Hiw", "title": "Electoral college", "kind": "Video", "description": "How we elect our President in the United States", "slug": "electoral-college"}, {"path": "khan/humanities/history/american-civics/american-civics/primaries-and-caucuses/", "id": "z_QeYCg4yJ8", "title": "Primaries and caucuses", "kind": "Video", "description": "How states choose their delegates for the national party conventions (video content under CC-BY-SA license)", "slug": "primaries-and-caucuses"}, {"path": "khan/humanities/history/american-civics/american-civics/deficit-and-debt-ceiling/", "id": "-05OfTp6ZEE", "title": "Deficit and debt ceiling", "kind": "Video", "description": "Basic of the deficit, debt and debt ceiling", "slug": "deficit-and-debt-ceiling"}, {"path": "khan/humanities/history/american-civics/american-civics/government-s-financial-condition/", "id": "LOiw5aBrm4Y", "title": "Government's financial condition", "kind": "Video", "description": "Difference between debt and operating costs. Seeing how large obligations are for social security and medicare", "slug": "government-s-financial-condition"}, {"path": "khan/humanities/history/american-civics/american-civics/social-security-intro/", "id": "gLHUCUv1e5Y", "title": "Social security intro", "kind": "Video", "description": "Basics on how social security works", "slug": "social-security-intro"}, {"path": "khan/humanities/history/american-civics/american-civics/fica-tax/", "id": "UP9xy2eVj7s", "title": "FICA tax", "kind": "Video", "description": "How the FICA tax is calculated and what it stands for", "slug": "fica-tax"}, {"path": "khan/humanities/history/american-civics/american-civics/medicare-sustainability/", "id": "o1Y0G8Z67iU", "title": "Medicare sustainability", "kind": "Video", "description": "How medicare is funded and why it is even less sustainable than social security", "slug": "medicare-sustainability"}, {"path": "khan/humanities/history/american-civics/american-civics/sopa-and-pipa/", "id": "tzqMoOk9NWc", "title": "SOPA and PIPA", "kind": "Video", "description": "What SOPA and PIPA are at face value and what they could end up enabling", "slug": "sopa-and-pipa"}, {"path": "khan/humanities/history/american-civics/american-civics/pension-obligations/", "id": "qBYa_QOWuaE", "title": "Pension obligations", "kind": "Video", "description": "Thinking about pensions, defined benefit plans, defined contribution plans and how pensions tend to get underfunded", "slug": "pension-obligations"}, {"path": "khan/humanities/history/american-civics/american-civics/illinois-pension-obligations/", "id": "Tczu_dvVuuk", "title": "Illinois pension obligations", "kind": "Video", "description": "Using Illinois as an example of what happens when pension obligations are underfunded.", "slug": "illinois-pension-obligations"}, {"path": "khan/humanities/history/american-civics/american-civics/fafsa_intro/", "id": "7nKXXKn6jL8", "title": "Introduction to the FAFSA", "kind": "Video", "slug": "fafsa_intro"}], "in_knowledge_map": false, "description": "Videos about how government works in the United States.", "node_slug": "american-civics", "render_type": "Tutorial", "topic_page_url": "/humanities/history/American civics/american-civics", "extended_slug": "humanities/history/American civics/american-civics", "kind": "Topic", "slug": "american-civics"}], "in_knowledge_map": false, "description": "", "node_slug": "American civics", "render_type": "Topic", "topic_page_url": "/humanities/history/American civics", "extended_slug": "humanities/history/American civics", "kind": "Topic", "slug": "american-civics"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/history/crashcourse-worldhistory/", "id": "CrashCourse-WorldHistory", "hide": false, "title": "Crash Course: World History", "child_data": [{"kind": "Topic", "id": "xc1d84f7e"}, {"kind": "Topic", "id": "x64a72e9d"}, {"kind": "Topic", "id": "x107130d1"}, {"kind": "Topic", "id": "x128866aa"}, {"kind": "Topic", "id": "xedab9ebe"}, {"kind": "Topic", "id": "x5f9475d8"}, {"kind": "Topic", "id": "x4e9283f5"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/crashcourse-worldhistory/what-happens-when-you-stay-put-2/", "id": "what-happens-when-you-stay-put-2", "hide": false, "title": "What happens when you stay put (the Neolithic revolution & early River Valley civilizations)", "child_data": [{"kind": "Video", "id": "x4afbbfe3"}, {"kind": "Video", "id": "x854a17b9"}, {"kind": "Video", "id": "x3ee659df"}, {"kind": "Video", "id": "x707b2692"}], "children": [{"path": "khan/humanities/history/crashcourse-worldhistory/what-happens-when-you-stay-put-2/crash-course-world-history-01/", "id": "Z_P5rqxeBVA", "title": "The Agricultural Revolution", "kind": "Video", "description": "In which John Green investigates the dawn of human civilization. John looks into how people gave up hunting and gathering to become agriculturalists, and how that change has influenced the world we live in today. Also, there are some jokes about cheeseburgers.", "slug": "crash-course-world-history-01"}, {"path": "khan/humanities/history/crashcourse-worldhistory/what-happens-when-you-stay-put-2/crash-course-world-history-02/", "id": "73yFDlgqPio", "title": "Indus Valley civilization", "kind": "Video", "description": "In which John Green teaches you about the Indus Valley Civilization, one of the largest of the ancient civilizations. John teaches you the who, how, when, where and why of the Indus Valley Civilization, and dispenses advice on how to be more successful in your romantic relationships.", "slug": "crash-course-world-history-02"}, {"path": "khan/humanities/history/crashcourse-worldhistory/what-happens-when-you-stay-put-2/crash-course-world-history-03/", "id": "EUGCai8y2Uw", "title": "Ancient Mesopotamia", "kind": "Video", "description": "In which John presents Mesopotamia, and the early civilizations that arose around the Fertile Crescent. Topics covered include the birth of territorial kingdoms, empires, Neo-Assyrian torture tactics, sacred marriages, ancient labor practices, the world's first law code, and the great failed romance of John's undergrad years.", "slug": "crash-course-world-history-03"}, {"path": "khan/humanities/history/crashcourse-worldhistory/what-happens-when-you-stay-put-2/crash-course-world-history-04/", "id": "Hpfs8uEo9WA", "title": "Ancient Egypt", "kind": "Video", "description": "In which John covers the long, long history of ancient Egypt, including the Old, Middle and New Kingdoms, and even a couple of intermediate periods. Learn about mummies, pharaohs, pyramids and the Nile with John Green.", "slug": "crash-course-world-history-04"}], "in_knowledge_map": false, "description": "", "node_slug": "what-happens-when-you-stay-put-2", "render_type": "Tutorial", "topic_page_url": "/humanities/history/CrashCourse-WorldHistory/what-happens-when-you-stay-put-2", "extended_slug": "humanities/history/CrashCourse-WorldHistory/what-happens-when-you-stay-put-2", "kind": "Topic", "slug": "what-happens-when-you-stay-put-2"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/crashcourse-worldhistory/so-thats-where-that-comes-from-2/", "id": "so-thats-where-that-comes-from-2", "hide": false, "title": "Oh, so that\u2019s where that comes from! (the ancient Greeks, Persians, Indians, Chinese & the trade between them. Oh, and also the Romans)", "child_data": [{"kind": "Video", "id": "x43c3ee35"}, {"kind": "Video", "id": "x064507fe"}, {"kind": "Video", "id": "x2c4b94d4"}, {"kind": "Video", "id": "xbc4b5b4c"}, {"kind": "Video", "id": "x2dea5317"}], "children": [{"path": "khan/humanities/history/crashcourse-worldhistory/so-thats-where-that-comes-from-2/crash-course-world-history-05/", "id": "7HUYGoJ2bD0", "title": "Greeks and Persians", "kind": "Video", "description": "In which John compares and contrasts Greek civilization and the Persian Empire. Of course we're glad that Greek civilization spawned modern western civilization, right? Maybe not. From Socrates and Plato to Darius and Xerxes, John explains two of the great powers of the ancient world, all WITHOUT the use of footage from 300.", "slug": "crash-course-world-history-05"}, {"path": "khan/humanities/history/crashcourse-worldhistory/so-thats-where-that-comes-from-2/crash-course-world-history-06/", "id": "OZbM1h3S-aA", "title": "Buddha and Ashoka", "kind": "Video", "description": "In which John relates a condensed history of India, post-Indus Valley Civilization. John explores Hinduism and the origins of Buddhism. He also gets into the reign of Ashoka, the Buddhist emperor who, in spite of Buddhism's structural disapproval of violence, managed to win a bunch of battles.", "slug": "crash-course-world-history-06"}, {"path": "khan/humanities/history/crashcourse-worldhistory/so-thats-where-that-comes-from-2/crash-course-world-history-07/", "id": "W74G5sNJMuA", "title": "2000 Years of Chinese History! The Mandate of Heaven and Confucius", "kind": "Video", "description": "In which John introduces you to quite a lot of Chinese history by discussing the complicated relationship between the Confucian scholars who wrote Chinese history and the emperors (and empress) who made it. Included is a brief introduction to all the dynasties in Chinese history and an introduction to Confucius and the Confucian emphasis on filial piety, the role the mandate of heaven played in organizing China, and how China became the first modern state.", "slug": "crash-course-world-history-07"}, {"path": "khan/humanities/history/crashcourse-worldhistory/so-thats-where-that-comes-from-2/crash-course-world-history-09/", "id": "hiRGC4lS9k8", "title": "The Silk Road and ancient trade", "kind": "Video", "description": "In which John Green teaches you about the so-called Silk Road, a network of trade routes where goods such as ivory, silver, iron, wine, and yes, silk were exchanged across the ancient world, from China to the West. Along with all these consumer goods, things like disease and ideas made the trip as well. As is his custom, John ties the Silk Road to modern life, and the ways that we get our stuff today.", "slug": "crash-course-world-history-09"}, {"path": "khan/humanities/history/crashcourse-worldhistory/so-thats-where-that-comes-from-2/crash-course-world-history-10/", "id": "eOp-GTRP-to", "title": "The Roman Empire. Or Republic. Or... which was it?", "kind": "Video", "description": "In which John Green explores exactly when Rome went from being the Roman Republic to the Roman Empire. Here's a hint: it had something to do with Julius Caesar, but maybe less than you think. Find out how Caesar came to rule the empire, what led to him getting stabbed 23 times on the floor of the senate, and what happened in the scramble for power after his assassination. John covers Rome's transition from city-state to dominant force in the Mediterranean in less than 12 minutes. Well, Rome's expansion took hundreds of years, he just explains it in under 12 minutes. The senate, the people, Rome, the Cesarean section, the Julian calendar and our old friend Pompey all make appearances, but NOT the Caesar Salad, as Julius had nothing to do with it.", "slug": "crash-course-world-history-10"}], "in_knowledge_map": false, "description": "", "node_slug": "so-thats-where-that-comes-from-2", "render_type": "Tutorial", "topic_page_url": "/humanities/history/CrashCourse-WorldHistory/so-thats-where-that-comes-from-2", "extended_slug": "humanities/history/CrashCourse-WorldHistory/so-thats-where-that-comes-from-2", "kind": "Topic", "slug": "so-thats-where-that-comes-from-2"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/", "id": "whats-God-got-to-do-with-It-2", "hide": false, "title": "What\u2019s God got to do with it? - a lot (Early Christianity, Byzantium, Islam, and Medieval Europe)", "child_data": [{"kind": "Video", "id": "x3cb8a81e"}, {"kind": "Video", "id": "xae001fdd"}, {"kind": "Video", "id": "xd75b261b"}, {"kind": "Video", "id": "x23754e27"}, {"kind": "Video", "id": "x95547179"}, {"kind": "Video", "id": "x074275a2"}], "children": [{"path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/crash-course-world-history-11/", "id": "zfJqkiNXShI", "title": "Christianity from Judaism to Constantine", "kind": "Video", "description": "In which John Green teaches you the history of Christianity, from the beginnings of Judaism and the development of monotheism, right up to Paul and how Christianity stormed the Roman Empire in just a few hundred years. Along the way, John will cover Abram/Abraham, the Covenant, the Roman Occupation of Judea, and the birth, life, death and legacy of Jesus of Nazareth. No flame wars! Let's keep the commentary civil.", "slug": "crash-course-world-history-11"}, {"path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/crash-course-world-history-12/", "id": "nLi5-KKcmY0", "title": "Fall of Rome the Roman Empire... in the 15th Century", "kind": "Video", "description": "In which John Green teaches you about the fall of the Roman Empire, which happened considerably later than you may have been told. While the Western Roman Empire fell to barbarians in 476 CE, the Byzantines in Constantinople continued the Eastern Empire nicely, calling themselves Romans for a further 1000 years. Find out what Justinian and the rest of the Byzantine emperors were up to over there, and how the Roman Empire dragged out its famous Decline well into medieval times. In addition to all this, you'll learn about ancient sports riots and hipster barbarians, too.", "slug": "crash-course-world-history-12"}, {"path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/crash-course-world-history-13/", "id": "3M8bwwafMxY", "title": "Islam, the Quran, and the Five Pillars all without a flamewar", "kind": "Video", "description": "In which John Green teaches you the history of Islam, including the revelation of the Qu'ran to Muhammad, the five pillars of Islam, how the Islamic empire got its start, the Rightly Guided Caliphs, and more. Learn about hadiths, Abu Bakr, and whether the Umma has anything to do with Uma Thurman (spoiler alert: it doesn't). Also, learn a little about the split between Sunni and Shia Muslims, and how to tell if this year's Ramadan is going to be difficult for your Muslim friends. Let's try to keep the flame wars out of this reasoned discussion.", "slug": "crash-course-world-history-13"}, {"path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/crash-course-world-history-14/", "id": "Qs0J-O0HCbA", "title": "The Dark Ages...how dark were they, really?", "kind": "Video", "description": "John Green teaches you about the so-called Dark Ages, which it turns out weren't as uniformly dark as you may have been led to believe. While Europe was indeed having some issues, many other parts of the world were thriving and relatively enlightened. John covers European Feudalism, the cultural blossoming of the Islamic world, and the scientific and artistic advances in China, all during these \"Dark Ages.\" Along the way, John will raise questions about the validity of Europe's status as a continent, reveal the best and worst years of his life, and frankly state that science and religion were once able to coexist.", "slug": "crash-course-world-history-14"}, {"path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/crash-course-world-history-15/", "id": "p13IEJ_V_U0", "title": "The Crusades - Pilgrimage or Holy War?", "kind": "Video", "description": "In which John Green teaches you about the Crusades embarked upon by European Christians in the 12th and 13th centuries. Our traditional perception of the Crusades as European Colonization thinly veiled in religion isn't quite right. John covers the First through the Fourth Crusades, telling you which were successful, which were well-intentioned yet ultimately destructive, and which were just plain crazy. Before you ask, no, he doesn't cover the Children's Crusade, in which children were provoked to gather for a Crusade, and then promptly sold into slavery by the organizers of said Crusade. While this story is charming, it turns out to be complete and utter hooey.", "slug": "crash-course-world-history-15"}, {"path": "khan/humanities/history/crashcourse-worldhistory/whats-god-got-to-do-with-it-2/crash-course-world-history-16/", "id": "Hz0neklvbX8", "title": "Mansa Musa and Islam in Africa", "kind": "Video", "description": "In which John Green teaches you about Sub-Saharan Africa! So, what exactly was going on there? It turns out, it was a lot of trade, converting to Islam, visits from Ibn Battuta, trade, beautiful women, trade, some impressive architecture, and several empires. John not only covers the West African Malian Empire, which is the one Mansa Musa ruled, but he discusses the Ghana Empire, and even gets over to East Africa as well to discuss the trade-based city-states of Mogadishu, Mombasa, and Zanzibar. In addition to all this, John considers emigrating to Canada.", "slug": "crash-course-world-history-16"}], "in_knowledge_map": false, "description": "", "node_slug": "whats-God-got-to-do-with-It-2", "render_type": "Tutorial", "topic_page_url": "/humanities/history/CrashCourse-WorldHistory/whats-God-got-to-do-with-It-2", "extended_slug": "humanities/history/CrashCourse-WorldHistory/whats-God-got-to-do-with-It-2", "kind": "Topic", "slug": "whats-god-got-to-do-with-it-2"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/crashcourse-worldhistory/road-trip-conquest-trade-2/", "id": "road-trip-conquest-trade-2", "hide": false, "title": "Road trip! (conquest, trade, & more conquest)", "child_data": [{"kind": "Video", "id": "x731ddc65"}, {"kind": "Video", "id": "xb08b2f39"}, {"kind": "Video", "id": "xfbbf5021"}, {"kind": "Video", "id": "x704ec3c0"}, {"kind": "Video", "id": "x9d3c5e68"}], "children": [{"path": "khan/humanities/history/crashcourse-worldhistory/road-trip-conquest-trade-2/crash-course-world-history-17/", "id": "TiXusw8aPMk", "title": "Wait for it... the Mongols!", "kind": "Video", "description": "In which John Green teaches you, at long last, about the most exceptional bunch of empire-building nomads in the history of the world, the Mongols! How did the Mongols go from being a relatively small band of herders who occasionally engaged in some light hunting-gathering to being one of the most formidable fighting forces in the world? It turns out Genghis Khan was a pretty big part of it, but you probably already knew that. The more interesting questions might be, what kind of rulers were they, and what effect did their empire have on the world we know today? Find out, as John FINALLY teaches you about the Mongols.", "slug": "crash-course-world-history-17"}, {"path": "khan/humanities/history/crashcourse-worldhistory/road-trip-conquest-trade-2/crash-course-world-history-18/", "id": "KZibsVxUOrw", "title": "International commerce, snorkeling camels, and the Indian Ocean Trade", "kind": "Video", "description": "In which John Green teaches you the history of the Indian Ocean Trade. John weaves a tale of swashbuckling adventure, replete with trade in books, ivory, and timber. Along the way, John manages to cover advances in seafaring technology, just how the monsoons work, and there's even a disembowelment for you Fangoria fans.", "slug": "crash-course-world-history-18"}, {"path": "khan/humanities/history/crashcourse-worldhistory/road-trip-conquest-trade-2/crash-course-world-history-19/", "id": "5OEZTU8FdVA", "title": "Venice and the Ottoman Empire", "kind": "Video", "description": "In which John Green discusses the strange and mutually beneficial relationship between a republic, the citystate of Venice, and an Empire, the Ottomans--and how studying history can help you to be a better boyfriend and/or girlfriend. Together, the Ottoman Empire and Venice grew wealthy by facilitating trade: The Venetians had ships and nautical expertise; the Ottomans had access to many of the most valuable goods in the world, especially pepper and grain. Working together across cultural and religious divides, they both become very rich, and the Ottomans became one of the most powerful political entities in the world. We also discuss how economic realities can overcome religious and political differences (in this case between Muslims and Christians), the doges of Venice, the sultans of the Ottoman empire, the janissaries and so-called slave aristocracy of the Ottoman Empire, and how money and knowledge from the Islamic world helped fuel and fund the European Renaissance. Also, there's a They Might Be Giants joke.", "slug": "crash-course-world-history-19"}, {"path": "khan/humanities/history/crashcourse-worldhistory/road-trip-conquest-trade-2/crash-course-world-history-20/", "id": "etmRI2_9Q_A", "title": "Russia, the Kievan Rus, and the Mongols", "kind": "Video", "description": "In which John Green teaches you how Russia evolved from a loose amalgamation of medieval principalities known as the Kievan Rus into the thriving democracy we know today. As you can imagine, there were a few bumps along the road. It turns out, our old friends the Mongols had quite a lot to do with unifying Russia. In yet another example of how surprisingly organized nomadic raiders can be, the Mongols brought the Kievan Rus together under a single leadership, and concentrated power in Moscow. This set the stage for the various Ivans (the Great and the Terrible) to throw off the yoke and form a pan-Russian nation ruled by an autocratic leader. More than 500 years later, we still have autocratic leadership in Russia. All this, plus a rundown of some of our favorite atrocities of Ivan the Terrible, and a visit from Putin!", "slug": "crash-course-world-history-20"}, {"path": "khan/humanities/history/crashcourse-worldhistory/road-trip-conquest-trade-2/crash-course-world-history-21/", "id": "LSnZ0ZX60hI", "title": "Columbus, de Gama, and Zheng He! 15th Century Mariners", "kind": "Video", "description": "In which John Green teaches you about the beginning of the so-called Age of Discovery. You've probably heard of Christopher Columbus, who \"discovered\" America in 1492, but what about Vasco da Gama? How about Zheng He? Columbus gets a bad rap from many modern historians, but it turns out he was pretty important as far as the history of the world goes. That said, he wasn't the only pioneer plying the seas in the 1400s. In Portugal, Vasco da Gama was busy integrating Europe into the Indian Ocean Trade by sailing around Africa. Chinese admiral Zheng He was also traveling far and wide in the largest wooden ships ever built. Columbus, whether portrayed as hero or villain, is usually credited as the great sailor of the 15th century, but he definitely wasn't the only contender. What better way to settle this question than with a knock-down, drag-out, no holds barred, old-fashioned battle royal? We were going to make it a cage match, but welding is EXPENSIVE.", "slug": "crash-course-world-history-21"}], "in_knowledge_map": false, "description": "", "node_slug": "road-trip-conquest-trade-2", "render_type": "Tutorial", "topic_page_url": "/humanities/history/CrashCourse-WorldHistory/road-trip-conquest-trade-2", "extended_slug": "humanities/history/CrashCourse-WorldHistory/road-trip-conquest-trade-2", "kind": "Topic", "slug": "road-trip-conquest-trade-2"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/", "id": "when-people-do-great-and-really-terrible-things-2", "hide": false, "title": "When people do great and really terrible things (The Renaissance, Colonialism, & the Slave Trade)", "child_data": [{"kind": "Video", "id": "x2251ad33"}, {"kind": "Video", "id": "x9408a114"}, {"kind": "Video", "id": "x9d165ed6"}, {"kind": "Video", "id": "x83be2b67"}, {"kind": "Video", "id": "xdd1ddd1b"}, {"kind": "Video", "id": "x3fe2c121"}], "children": [{"path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-22/", "id": "VMtXfhvQRTo", "title": "The Renaissance: Was it a Thing?", "kind": "Video", "description": "In which John Green teaches you about the European Renaissance. European learning changed the world in the 15th and 16th century, but was it a cultural revolution, or an evolution? We'd argue that any cultural shift that occurs over a couple of hundred years isn't too overwhelming to the people who live through it. In retrospect though, the cultural bloom in Europe during this time was pretty impressive. In addition to investigating what caused the Renaissance and who benefitted from the changes that occurred, John will tell you just how the Ninja Turtles got mixed up in all this.", "slug": "crash-course-world-history-22"}, {"path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-23/", "id": "a4nfbZYZ3SI", "title": "The Columbian Exchange", "kind": "Video", "description": "In which John Green teaches you about the changes wrought by contact between the Old World and the New. John does this by exploring the totally awesome history book \"The Columbian Exchange\" by Alfred Cosby, Jr. After Columbus \"discovered\" the Americas, European conquerors, traders, and settlers brought all manner of changes to the formerly isolated continents. Disease and invasive plant and animal species remade the New World, usually in negative ways. While native people, plants, and animals were being displaced in the Americas, the rest of the world was benefitting from American imports, especially foods like maize, tomatoes, potatoes, pineapple, blueberries, sweet potatoes, and manioc. Was the Columbian Exchange a net positive? It's debatable. So debate.", "slug": "crash-course-world-history-23"}, {"path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-24/", "id": "3X5JMS9_EK8", "title": "The Atlantic Slave Trade", "kind": "Video", "description": "In which John Green teaches you about one of the least funny subjects in history: slavery. John investigates when and where slavery originated, how it changed over the centuries, and how Europeans and colonists in the Americas arrived at the idea that people could own other people based on skin color.\u00a0\n\nSlavery has existed as long as humans have had civilization, but the Atlantic Slave Trade was the height, or depth, of dehumanizing, brutal, chattel slavery. American slavery ended less than 150 years ago. In some parts of the world, it is still going on. So how do we reconcile that with modern life? In a desperate attempt at comic relief, Boba Fett makes an appearance.", "slug": "crash-course-world-history-24"}, {"path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-25/", "id": "ybOKAzIVp70", "title": "The Spanish Empire, silver, & runaway inflation", "kind": "Video", "description": "In which John Green explores how Spain went from being a middling European power to one of the most powerful empires on Earth, thanks to their plunder of the New World in the 16th and 17th centuries. Learn how Spain managed to destroy the two biggest pre-Columbian civilizations, mine a mountain made of silver, mishandle their economy, and lose it all by the mid-1700s. Come along for the roller coaster ride with Charles I (he was also Charles V), Philip II, Atahualpa, Moctezuma, Hern\u00e1n Cort\u00e9s, and Francisco Pizarro as Spain rises and falls, and takes two empires and China down with them.", "slug": "crash-course-world-history-25"}, {"path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-26/", "id": "ICI0gpCS_Pc", "title": "The Seven Years War", "kind": "Video", "description": "In which John teaches you about the Seven Years War, which may have lasted nine years. Or as many as 23. It was a very confusing war. The Seven Years War was a global war, fought on five continents, which is kind of a lot. John focuses on the war as it happened in the Americas, Asia, and Africa. the \"great\" European powers were the primary combatants, but they fought just about everywhere. Of course, this being a history course, the outcomes of this war still resonate in our lives today. The Seven Years war determined the direction of the British Empire, and led pretty directly to the subject of Episode 28, the American Revolution.", "slug": "crash-course-world-history-26"}, {"path": "khan/humanities/history/crashcourse-worldhistory/when-people-do-great-and-really-terrible-things-2/crash-course-world-history-027/", "id": "3281cSAuk2g", "title": "The amazing life and strange death of Captain Cook", "kind": "Video", "description": "In which John Green teaches you about the life and death of one of history's great explorers, Captain James Cook of the British Navy. He charted large swaths of the Pacific ocean, laid claim to Australia and New Zealand, and died a bizarre death in the Sandwich Islands, which are now called the Hawaiian Islands. Exactly how and why Captain Cook was killed in Hawaii is a long-running historical debate. John presents two interpretations of the event, and talks about what the differing interpretations say about history. It turns out how the story is told depends on who is doing the storytelling, and people from different backgrounds can interpret events in very different ways. Also, there is a celebration and a moustache involved in this episode, so you definitely don't want to miss it.", "slug": "crash-course-world-history-027"}], "in_knowledge_map": false, "description": "", "node_slug": "when-people-do-great-and-really-terrible-things-2", "render_type": "Tutorial", "topic_page_url": "/humanities/history/CrashCourse-WorldHistory/when-people-do-great-and-really-terrible-things-2", "extended_slug": "humanities/history/CrashCourse-WorldHistory/when-people-do-great-and-really-terrible-things-2", "kind": "Topic", "slug": "when-people-do-great-and-really-terrible-things-2"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/", "id": "you-aint-the-boss-of-me-2", "hide": false, "title": "You ain\u2019t the boss of me! Oh, maybe you are (Revolution and Modern Society)", "child_data": [{"kind": "Video", "id": "x0266d343"}, {"kind": "Video", "id": "xe95d87b8"}, {"kind": "Video", "id": "x9da82478"}, {"kind": "Video", "id": "xc6077777"}, {"kind": "Video", "id": "xca10f1d5"}, {"kind": "Video", "id": "x57d39ed9"}], "children": [{"path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/crash-course-world-history-28/", "id": "dkxnUlg-bUY", "title": "Tea, Taxes, and the American Revolution", "kind": "Video", "description": "In which John Green teaches you about the American Revolution and the American Revolutionary War, which it turns out were two different things. John goes over the issues and events that precipitated rebellion in Britain's American colonies, and he also explores the ideas that laid the groundwork for the new American democracy. Find out how the tax bill from the Seven Years War fomented an uprising, how the Enlightenment influenced the Founding Fathers, and who were the winners and losers in this conflict.(hint: many of the people living in the Colonies ended up losers) The Revolution purportedly brought freedom and equality to the Thirteen Colonies, but they weren't equally distributed. Also, you'll learn about America's love affair with commemorative ceramics and what happens when rich white guys take the reins from reins white guys, and put together a society of, by, and for rich white guys.", "slug": "crash-course-world-history-28"}, {"path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/crash-course-world-history-29/", "id": "_Vxg6bsNgYU", "title": "The French Revolution", "kind": "Video", "description": "In which John Green examines the French Revolution, and gets into how and why it differed from the American Revolution. Was it the serial authoritarian regimes? The guillotine? The Reign of Terror? All of this and more contributed to the French Revolution not being quite as revolutionary as it could have been. France endured multiple constitutions, the heads of heads of state literally rolled, and then they ended up with a megalomaniacal little emperor by the name of Napoleon. But how did all of this change the world, and how did it lead to other, more successful revolutions around the world? Watch this video and find out. Spoiler alert: Marie Antoinette never said, \"Let them eat cake.\" Sorry.", "slug": "crash-course-world-history-29"}, {"path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/crash-course-world-history-30/", "id": "YYGb1Fmz6TY", "title": "The Haitian Revolutions", "kind": "Video", "description": "Ideas like liberty, freedom, and self-determination were hot stuff in the late 18th century, as evidenced by our recent revolutionary videos. Although freedom was breaking out all over, many of the societies that were touting these ideas relied on slave labor. Few places in the world relied so heavily on slave labor as Saint-Domingue, France's most profitable colony. Slaves made up nearly 90% of Saint-Domingue's population, and in 1789 they couldn't help but hear about the revolution underway in France. All the talk of liberty, equality, and fraternity sounds pretty good to a person in bondage, and so the slaves rebelled. This led to not one but two revolutions, and ended up with France, the rebels, Britain, and Spain all fighting in the territory. Spoiler alert: the slaves won. So how did the slaves of what would become Haiti throw off the yoke of one of the world's great empires? John Green tells how they did it, and what it has meant in Haiti and in the rest of the world.", "slug": "crash-course-world-history-30"}, {"path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/crash-course-world-history-31/", "id": "kjAjlkzkvBU", "title": "Latin American Revolutions", "kind": "Video", "description": "In which John Green talks about the many revolutions of Latin America in the 19th century. At the beginning of the 1800s, Latin America was firmly under the control of Spain and Portugal. The revolutionary zeal that had recently created the United States and had taken off Louis XVI's head in France arrived in South America, and a racially diverse group of people who felt more South American than European took over. John covers the soft revolution of Brazil, in which Prince Pedro boldly seized power from his father, but promised to give it back if King Jo\u00e3o ever returned to Brazil. He also covers the decidedly more violent revolutions in Mexico, Venezuela, and Argentina. Watch the video to see Sim\u00f3n Bol\u00edvar's dream of a United South America crushed, even as he manages to liberate a bunch of countries and get two currencies and about a thousand schools and parks named after him.", "slug": "crash-course-world-history-31"}, {"path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/crash-course-world-history-32/", "id": "tEHF3JB2ZqE", "title": "Coal, steam, and the Industrial Revolution", "kind": "Video", "description": "In which John Green wraps up revolutions month with what is arguably the most revolutionary of modern revolutions, the Industrial Revolution. While very few leaders were beheaded in the course of this one, it changed the lives of more people more dramatically than any of the political revolutions we've discussed. So, why did the Industrial Revolution happen around 1750 in the United Kingdom? Coal. Easily accessible coal, it turns out. All this, plus you'll finally learn the difference between James Watt and Thomas Newcomen, and will never again be caught telling people that your blender has a 900 Newcomen motor.", "slug": "crash-course-world-history-32"}, {"path": "khan/humanities/history/crashcourse-worldhistory/you-aint-the-boss-of-me-2/crash-course-world-history-33/", "id": "Uu-5ofhxOX8", "title": "Capitalism and Socialism", "kind": "Video", "description": "In which John Green teaches you about capitalism and socialism in a way that is sure to please commenters from both sides of the debate. Learn how capitalism arose from the industrial revolution, and then gave rise to socialism. Learn about how we got from the British East India Company to iPhones and consumer culture in just a couple of hundred years. Stops along the way include the rise of industrial capitalism, mass production, disgruntled workers, Karl Marx, and the Socialist Beard. The socialist reactions to the ills of capitalism are covered as well, and John discusses some of the ideas of Karl Marx, and how they've been implemented or ignored in various socialist states. Plus, there are robots!", "slug": "crash-course-world-history-33"}], "in_knowledge_map": false, "description": "", "node_slug": "you-aint-the-boss-of-me-2", "render_type": "Tutorial", "topic_page_url": "/humanities/history/CrashCourse-WorldHistory/you-aint-the-boss-of-me-2", "extended_slug": "humanities/history/CrashCourse-WorldHistory/you-aint-the-boss-of-me-2", "kind": "Topic", "slug": "you-aint-the-boss-of-me-2"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/", "id": "nationalism-imperialism-globalization-2", "hide": false, "title": "Nationalism, Imperialism & Globalization: the good, the bad and the really, really ugly", "child_data": [{"kind": "Video", "id": "x4b9386c0"}, {"kind": "Video", "id": "x93355517"}, {"kind": "Video", "id": "x960b648c"}, {"kind": "Video", "id": "xd9e4a8f3"}, {"kind": "Video", "id": "xc7a3fc40"}, {"kind": "Video", "id": "x109df4d2"}, {"kind": "Video", "id": "xb88a2eb5"}, {"kind": "Video", "id": "x1d6a85cc"}, {"kind": "Video", "id": "x27dc9e1e"}], "children": [{"path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-34/", "id": "hk_21n8ITqg", "title": "Samurai, Daimyo, Matthew Perry, and Nationalism", "kind": "Video", "description": "In which John Green teaches you about Nationalism. Nationalism was everywhere in the 19th century, as people all over the world carved new nation-states out of old empires. Nationalist leaders changed the way people thought of themselves and the places they lived by reinventing education, military service, and the relationship between government and governed. In Japan, the traditional feudal society underwent a long transformation over the course of about 300 years to become a modern nation-state. John follows the course of Japanese history from the emergence of the Tokugawa Shogunate to the Meiji Restoration, and covers Nationalism in many other countries along the way. All this, plus a special guest appearance, plus the return of an old friend on a extra-special episode of Crash Course.", "slug": "crash-course-world-history-34"}, {"path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-35/", "id": "cFbMqzDSVVg", "title": "Imperialism", "kind": "Video", "description": "In which John Green teaches you about European Imperialism in the 19th century. European powers started to create colonial empires way back in the 16th century, but businesses really took off in the 19th century, especially in Asia and Africa. During the 1800s, European powers carved out spheres of influence in China, India, and pretty much all of Africa. While all of the major (and some minor) powers in Europe participated in this new imperialism, England was by far the most dominant, once able to claim that the \"sun never set on the British Empire.\" Also, they went to war for the right to continue to sell opium to the people of China. Twice. John will teach you how these empires managed to leverage the advances of the Industrial Revolution to build vast, wealth-generating empires. As it turns out, improved medicine, steam engines, and better guns were crucial in the 19th century conquests. Also, the willingness to exploit and abuse the people and resources of so-called \"primitive\" nations was very helpful in the whole enterprise.", "slug": "crash-course-world-history-35"}, {"path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-36/", "id": "ntUjJENYiLw", "title": "Archdukes, Cynicism, and World War I", "kind": "Video", "description": "In which John Green teaches you about the war that was supposed to end all wars. Instead, it solved nothing and set the stage for the world to be back at war just a couple of decades later. As an added bonus, World War I changed the way people look at the world, and normalized cynicism and irony. John will teach you how the assassination of an Austrian Archduke kicked off a new kind of war that involved more nations and more people than any war that came before. New technology like machine guns, airplanes, tanks, and poison gas made the killing more efficient than ever. Trench warfare and modern weapons led to battles in which tens of thousands of soldiers were killed in a day, with no ground gained for either side. World War I washed away the last vestiges of 19th century Romanticism and paved the way for the 20th century modernism that we all know and find to be cold and off-putting. While there may not be much upside to WWI, at least it inspired George M. Cohan to write the awesome song, \"Over There.\"", "slug": "crash-course-world-history-36"}, {"path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-37/", "id": "a1AhZoWTLUI", "title": "Communists, Nationalists, and China's Revolutions", "kind": "Video", "description": "In which John Green teaches you about China's Revolutions. While the rest of the world was off having a couple of World Wars, China was busily uprooting the dynastic system that had ruled there for millennia. Most revolutions have some degree of tumult associated with them, but China's 20th century revolutions were REALLY disruptive. In 1911 and 1912, Chinese nationalists brought 3000 years of dynastic rule to an end. China plunged into chaos as warlords staked out regions of the country for themselves. The nationalists and communists joined forces briefly to bring the nation back together under the Chinese Republic, and then they quickly split and started fighting the Chinese Civil War. The fight between nationalists and communists went on for decades, and was interrupted by an alliance to fight the invading Japanese during World War II. After the World War II ended, the Chinese Civil War was back on. Mao and the communists were ultimately victorious, and Chiang Kai-Shek ended up in Taiwan. And then it got weird. Mao spent years repeatedly trying to purify the Communist Party and build up the new People's Republic of China with Rectifications, Anti Campaigns, Five Year Plans. the Great Leap Forward, and the Cultural Revolution. These had mixed results, to say the least. John will cover all this and more in this week's Crash Course World History.", "slug": "crash-course-world-history-37"}, {"path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-38/", "id": "dllD-6loBK4", "title": "World War II", "kind": "Video", "description": "In which John Green teaches you about World War II, aka The Great Patriotic War, aka The Big One. So how did this war happen? And what does it mean? We've all learned the facts about World War II many times over, thanks to repeated classroom coverage, the History channel, and your grandfather (or maybe great-grandfather) showing you that Nazi bayonet he used to keep in his sock drawer and telling you a bunch of age-inappropriate stories about his harrowing war experiences. So, why did the Axis powers think forceful expansion was a good idea? (they were hungry). So why did this thing shake out in favor of the Allies? HInt: it has to do with the fact that it was a world war. Germany and Japan made some pretty serious strategic errors, such as invading Russia and attacking the United States, and those errors meant that pretty much the whole world was against them. So, find out how this worldwide alliance came together to stop the Axis expansion. All this, plus Canada finally gets the respectful treatment it deserves. Oh, and a warning: there are a few graphic images in this episode. Sensitive viewers may want to use caution, especially around the 9:15 mark.", "slug": "crash-course-world-history-38"}, {"path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-39/", "id": "2-oQA64myZQ", "title": "USA vs USSR Fight! The Cold War", "kind": "Video", "description": "In which John Green teaches you about the Cold War, which was occasionally hot, but on average, it was cool. In the sense of its temperature. It was by no means cool, man. After World War II, there were basically two big geopolitical powers left to divide up the world. And divide they did. The United States and the Soviet Union divvied up Europe in the aftermath of the war, and then proceeded to spend the next 45 years fighting over the rest of the world. It was the great ideological struggle, with the US on the side of capitalism and profit, and the USSR pushing Communism, so-called. While both sides presented themselves as the good guy in this situation, the reality is that there are no good guys. Both parties to the Cold War engaged in forcible regime changes, built up vast nuclear arsenals, and basically got up to dirty tricks. If you had to pick a bad guy though, I would point out that the USSR had no intention of bringing Laika the Cosmonaut Dog home alive. That poor dog never had a shot.", "slug": "crash-course-world-history-39"}, {"path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/decolonization-world-history-40/", "id": "podbMDjFNAY", "title": "Decolonization and Nationalism Triumphant", "kind": "Video", "description": "In which John Green teaches you about the post-World War II breakup of most of the European empires. As you'll remember from previous installments of Crash Course, Europeans spent several centuries sailing around the world creating empires, despite the fact that most of the places they conquered were perfectly happy to carry on alone. After World War II, most of these empires collapsed. This is the story of those collapses. In most places, the end of empire was not orderly, and violence often ensued. While India was a (sort of) shining example of non-violent change, in places like The Congo, Egypt, Rwanda, Vietnam, Cambodia, and Laos, things didn't go smoothly at all. John brings you all this, plus pictures of Sea Monkeys. Sadly, they don't look anything like those awesome commercials in the comic books.", "slug": "decolonization-world-history-40"}, {"path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-41/", "id": "xFHh89QTRSE", "title": "Globalization I - The upside", "kind": "Video", "description": "In which John Green teaches you about globalization, a subject so epic, so, um, global, it requires two videos. In this video, John follows the surprisingly complex path of t-shirt as it criss-crosses the world before coming to rest on your doorstep, and eventually in your dresser. (Unless you're one of those people who never puts their laundry away and lives out of a laundry basket. If that's the case, shame on you.) Anyway, the story of the t-shirt and its manufacture in far-flung places like China, Guatemala, and India is a microcosm of what's going on in the global economy. Globalization is a bit of a mixed bag, and there have definitely been winners and losers along the way. In this episode John will talk about some of the benefits that have come along with it. Next week, he'll get into some of the less-positive side effects of globalization.", "slug": "crash-course-world-history-41"}, {"path": "khan/humanities/history/crashcourse-worldhistory/nationalism-imperialism-globalization-2/crash-course-world-history-42/", "id": "ySDcYZEcxcQ", "title": "Globalization II - good or bad?", "kind": "Video", "description": "In which John asks whether globalization is a net positive for humanity. While the new global economy has created a lot of wealth, and lifted a lot of people out of poverty, it also has some effects that aren't so hot. Wealth disparity, rising divorce rates, environmental damage, and new paths for the spread of disease. So does all this outweigh the economic benefits, the innovation, and the relative peace that come with interconnected economies? As usual, the answer is not simple. In this case, we're living in the middle of the events we're discussing, so it's hard to know how it's going to turn out.", "slug": "crash-course-world-history-42"}], "in_knowledge_map": false, "description": "", "node_slug": "nationalism-imperialism-globalization-2", "render_type": "Tutorial", "topic_page_url": "/humanities/history/CrashCourse-WorldHistory/nationalism-imperialism-globalization-2", "extended_slug": "humanities/history/CrashCourse-WorldHistory/nationalism-imperialism-globalization-2", "kind": "Topic", "slug": "nationalism-imperialism-globalization-2"}], "in_knowledge_map": false, "description": "John Green teaches you the history of the world in 42 episodes of Crash Course. Learn, study and understand all the important civilizations, empires, wars, and revolutions the world has seen so far.", "node_slug": "CrashCourse-WorldHistory", "render_type": "Topic", "topic_page_url": "/humanities/history/CrashCourse-WorldHistory", "extended_slug": "humanities/history/CrashCourse-WorldHistory", "kind": "Topic", "slug": "crashcourse-worldhistory"}], "in_knowledge_map": false, "description": "The history of the world (eventually)!", "node_slug": "history", "render_type": "Subject", "topic_page_url": "/humanities/history", "extended_slug": "humanities/history", "kind": "Topic", "slug": "history"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/music/", "id": "music", "hide": false, "title": "Music", "child_data": [{"kind": "Topic", "id": "x64497fc7"}, {"kind": "Topic", "id": "xed0efcdc"}, {"kind": "Topic", "id": "x508b6924"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-basics-notes-rhythm-music/", "id": "music-basics-notes-rhythm-music", "hide": false, "title": "Music basics: Notes and rhythm", "child_data": [{"kind": "Video", "id": "x66f0775f"}, {"kind": "Video", "id": "x2e654f1e"}, {"kind": "Video", "id": "x8401bfc8"}, {"kind": "Video", "id": "xd988a512"}, {"kind": "Video", "id": "x26a800b0"}, {"kind": "Video", "id": "x859f88b9"}, {"kind": "Article", "id": "x9cfdeacb"}], "children": [{"path": "khan/humanities/music/music-basics-notes-rhythm-music/lesson-1-note-values-duration-and-time-signatures/", "id": "wQHcz7U01M4", "title": "Lesson 1: Note values, duration, and time signatures", "kind": "Video", "description": "Definitions and basic concepts", "slug": "lesson-1-note-values-duration-and-time-signatures"}, {"path": "khan/humanities/music/music-basics-notes-rhythm-music/lesson-2-rhythm-dotted-notes-ties-and-rests/", "id": "ZPRMFBN8p4Q", "title": "Lesson 2: Rhythm, dotted notes, ties, and rests", "kind": "Video", "slug": "lesson-2-rhythm-dotted-notes-ties-and-rests"}, {"path": "khan/humanities/music/music-basics-notes-rhythm-music/lesson-3-meters-in-double-and-triple-time-upbeats/", "id": "GFnucXG0K1I", "title": "Lesson 3: Meters in double and triple time, upbeats", "kind": "Video", "slug": "lesson-3-meters-in-double-and-triple-time-upbeats"}, {"path": "khan/humanities/music/music-basics-notes-rhythm-music/lesson-4-meters-in-6-9-and-12/", "id": "mVFbGjnysP0", "title": "Lesson 4: Meters in 6, 9, and 12", "kind": "Video", "slug": "lesson-4-meters-in-6-9-and-12"}, {"path": "khan/humanities/music/music-basics-notes-rhythm-music/lesson-5-review-of-time-signatures-simple-compound-and-complex/", "id": "w89mmoD0O4c", "title": "Lesson 5: Review of time signatures \u2013 Simple, compound, and complex", "kind": "Video", "slug": "lesson-5-review-of-time-signatures-simple-compound-and-complex"}, {"path": "khan/humanities/music/music-basics-notes-rhythm-music/lesson-6-constant-versus-changing-time-adding-triplets-and-duplets/", "id": "esbqpgAD-EM", "title": "Lesson 6: Constant versus changing time, adding triplets, and duplets", "kind": "Video", "slug": "lesson-6-constant-versus-changing-time-adding-triplets-and-duplets"}], "in_knowledge_map": false, "description": "The basic principles of music are explained in plain language with helpful graphics and live video demonstrations. If you have ever wondered \"how does music work?\" then you'll find answers here. Presented by the All-Star Orchestra music director Gerard Schwarz.", "node_slug": "music-basics-notes-rhythm-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-basics-notes-rhythm-music", "extended_slug": "humanities/music/music-basics-notes-rhythm-music", "kind": "Topic", "slug": "music-basics-notes-rhythm-music"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/music/music-masterpieces-old-new/", "id": "music-masterpieces-old-new", "hide": false, "title": "Masterpieces old and new", "child_data": [{"kind": "Topic", "id": "x5af18a2f"}, {"kind": "Topic", "id": "x45c30872"}, {"kind": "Topic", "id": "xc177e161"}, {"kind": "Topic", "id": "x34078112"}, {"kind": "Topic", "id": "x15b91bcb"}, {"kind": "Topic", "id": "xfbf70318"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-masterpieces-old-new/ludwig-van-beethoven-music/", "id": "ludwig-van-beethoven-music", "hide": false, "title": "Ludwig van Beethoven: Symphony No. 5", "child_data": [{"kind": "Video", "id": "x1aa715a0"}, {"kind": "Video", "id": "xa965e726"}, {"kind": "Video", "id": "x8c3b92d4"}, {"kind": "Video", "id": "x17f7b93e"}, {"kind": "Video", "id": "x1b205730"}], "children": [{"path": "khan/humanities/music/music-masterpieces-old-new/ludwig-van-beethoven-music/ludwig-van-beethoven-part-1/", "id": "-rGXAfc643A", "title": "Ludwig van Beethoven: Symphony No. 5, analysis by Gerard Schwarz (part 1)", "kind": "Video", "description": "Watch the full performance here", "slug": "ludwig-van-beethoven-part-1"}, {"path": "khan/humanities/music/music-masterpieces-old-new/ludwig-van-beethoven-music/ludwig-van-beethoven-symphony-no-5-analysis-by-gerard-schwarz-mov-2/", "id": "iFCIgn3Q9XE", "title": "Ludwig van Beethoven: Symphony No. 5 Analysis by Gerard Schwarz (part 2)", "kind": "Video", "description": "Watch the full performance here", "slug": "ludwig-van-beethoven-symphony-no-5-analysis-by-gerard-schwarz-mov-2"}, {"path": "khan/humanities/music/music-masterpieces-old-new/ludwig-van-beethoven-music/beethoven-fifth-movements-3-4/", "id": "ksK2mbPgiLI", "title": "Ludwig van Beethoven: Symphony No. 5, analysis by Gerard Schwarz (part 3 & 4)", "kind": "Video", "description": "\u200bWatch the complete performance at here starting at 10:40.", "slug": "beethoven-fifth-movements-3-4"}, {"path": "khan/humanities/music/music-masterpieces-old-new/ludwig-van-beethoven-music/gerard-schwarz-gives-a-conducting-lesson-beethoven-5th-part-1/", "id": "m9h7Vt8ZjqE", "title": "Ludwig van Beethoven: Symphony No. 5, a conducting lesson by Gerard Schwarz (1st Movement)", "kind": "Video", "description": "Watch the full performance here (starting at 10:40)", "slug": "gerard-schwarz-gives-a-conducting-lesson-beethoven-5th-part-1"}, {"path": "khan/humanities/music/music-masterpieces-old-new/ludwig-van-beethoven-music/ludwig-van-beethoven-symphony-no-5-an-appreciation-by-leon-botstein/", "id": "DGBYyf08nWM", "title": "Ludwig van Beethoven: Symphony No. 5, an appreciation by Leon Botstein", "kind": "Video", "slug": "ludwig-van-beethoven-symphony-no-5-an-appreciation-by-leon-botstein"}], "in_knowledge_map": false, "description": "Possibly the most iconic of all symphonies, \"Beethoven's 5th\" is instantly recognizable by its dramatic opening motive. Learn how this rhythmic and melodic idea permeates the entire work, holding the listener in thrall through all four movements to the blazing finale. Music Director Gerard Schwarz and noted expert Leon Botstein explore the many facets of Beethoven's masterpiece, including a demonstration by Maestro Schwarz of how to conduct the first movement.", "node_slug": "ludwig-van-beethoven-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-masterpieces-old-new/ludwig-van-beethoven-music", "extended_slug": "humanities/music/music-masterpieces-old-new/ludwig-van-beethoven-music", "kind": "Topic", "slug": "ludwig-van-beethoven-music"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-masterpieces-old-new/antonin-dvorak-music/", "id": "antonin-dvorak-music", "hide": false, "title": "Anton\u00edn Dvo\u0159\u00e1k: Symphony No. 9 \"From the New World\"", "child_data": [{"kind": "Video", "id": "xabf25d1f"}, {"kind": "Video", "id": "x0247474a"}, {"kind": "Video", "id": "xf5c5407b"}, {"kind": "Video", "id": "xe4424a1e"}, {"kind": "Video", "id": "x3f8ef954"}], "children": [{"path": "khan/humanities/music/music-masterpieces-old-new/antonin-dvorak-music/dvorak-one/", "id": "4vuybxJvRuA", "title": "Anton\u00edn Dvo\u0159\u00e1k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 1)", "kind": "Video", "description": "Watch the full performance here", "slug": "dvorak-one"}, {"path": "khan/humanities/music/music-masterpieces-old-new/antonin-dvorak-music/dvorak-two/", "id": "Egzqu5DWwbA", "title": "Antoni\u0301n Dvor\u030ca\u0301k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 2)", "kind": "Video", "description": "Watch the full performance here", "slug": "dvorak-two"}, {"path": "khan/humanities/music/music-masterpieces-old-new/antonin-dvorak-music/dvorak-three/", "id": "umoSO56Nwa8", "title": "Antoni\u0301n Dvor\u030ca\u0301k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 3)", "kind": "Video", "description": "Watch the full performance here", "slug": "dvorak-three"}, {"path": "khan/humanities/music/music-masterpieces-old-new/antonin-dvorak-music/dvorak-four/", "id": "9x1vnGfIE8k", "title": "Antoni\u0301n Dvor\u030ca\u0301k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 4)", "kind": "Video", "description": "Watch the full performance here", "slug": "dvorak-four"}, {"path": "khan/humanities/music/music-masterpieces-old-new/antonin-dvorak-music/joseph-horowitz-on-dvorak-minilecture/", "id": "AqvaQfbAC64", "title": "Anton\u00edn Dvo\u0159\u00e1k: Symphony No. 9 \"From the New World\" From the New World,\" a commentary by Joseph Horowitz", "kind": "Video", "slug": "joseph-horowitz-on-dvorak-minilecture"}], "in_knowledge_map": false, "description": "", "node_slug": "antonin-dvorak-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-masterpieces-old-new/antonin-dvorak-music", "extended_slug": "humanities/music/music-masterpieces-old-new/antonin-dvorak-music", "kind": "Topic", "slug": "antonin-dvorak-music"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-masterpieces-old-new/igor-stravinsky-music/", "id": "igor-stravinsky-music", "hide": false, "title": "Igor Stravinsky: Suite from The Firebird", "child_data": [{"kind": "Video", "id": "x0643e82f"}], "children": [{"path": "khan/humanities/music/music-masterpieces-old-new/igor-stravinsky-music/discover-stravinsky-firebird/", "id": "Im_XjHgQfW0", "title": "Discovering Stravinsky's Firebird: The story and the music", "kind": "Video", "description": "Watch the full performance here", "slug": "discover-stravinsky-firebird"}], "in_knowledge_map": false, "description": "", "node_slug": "igor-stravinsky-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-masterpieces-old-new/igor-stravinsky-music", "extended_slug": "humanities/music/music-masterpieces-old-new/igor-stravinsky-music", "kind": "Topic", "slug": "igor-stravinsky-music"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-masterpieces-old-new/maurice-ravel-music/", "id": "maurice-ravel-music", "hide": false, "title": "Maurice Ravel: Suite No. 2 from Daphnis et Chloe", "child_data": [{"kind": "Video", "id": "xd68d629e"}], "children": [{"path": "khan/humanities/music/music-masterpieces-old-new/maurice-ravel-music/ravel-suite2/", "id": "qfqbomqKZqY", "title": "Maurice Ravel: Daphnis et Chloe\u0301, analysis by Gerard Schwarz", "kind": "Video", "description": "Watch full performance here", "slug": "ravel-suite2"}], "in_knowledge_map": false, "description": "Analysis by Gerard Schwarz. A love story from ancient Greek mythology inspired the creation of an epic ballet in 1912. French composer Maurice Ravel expanded the possibilities of orchestral color and texture in his remarkable score. Music Director Gerard Schwarz explores the history and musical structure of this landmark work of musical Impressionism.", "node_slug": "maurice-ravel-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-masterpieces-old-new/maurice-ravel-music", "extended_slug": "humanities/music/music-masterpieces-old-new/maurice-ravel-music", "kind": "Topic", "slug": "maurice-ravel-music"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-masterpieces-old-new/augusta-read-thomas-music/", "id": "augusta-read-thomas-music", "hide": false, "title": "Augusta Read Thomas: Of Paradise and Light", "child_data": [{"kind": "Video", "id": "xf4ebba14"}], "children": [{"path": "khan/humanities/music/music-masterpieces-old-new/augusta-read-thomas-music/of-paradise-and-light-composer-and-her-work/", "id": "7BEbEZstN_k", "title": "Of Paradise and Light: The composer and her work", "kind": "Video", "description": "Watch the full performance here.", "slug": "of-paradise-and-light-composer-and-her-work"}], "in_knowledge_map": false, "description": "A leading composer of her generation, Augusta Read Thomas' works have been performed by major orchestras around the world. Here she discusses the compositional process that led to Of Paradise and Light. Music Director Gerard Schwarz joins in the discussion of this transcendent new work.", "node_slug": "augusta-read-thomas-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-masterpieces-old-new/augusta-read-thomas-music", "extended_slug": "humanities/music/music-masterpieces-old-new/augusta-read-thomas-music", "kind": "Topic", "slug": "augusta-read-thomas-music"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-masterpieces-old-new/bernard-rands-music/", "id": "bernard-rands-music", "hide": false, "title": "Bernard Rands: Adieu", "child_data": [{"kind": "Video", "id": "xdc3fa245"}], "children": [{"path": "khan/humanities/music/music-masterpieces-old-new/bernard-rands-music/adieu-composer-and-his-work/", "id": "WYI4u3beRdM", "title": "Adieu: The composer and his work", "kind": "Video", "description": "Watch the full performance here", "slug": "adieu-composer-and-his-work"}], "in_knowledge_map": false, "description": "Pulitzer-prize-winning composer and Harvard Professor of Music Bernard Rands discusses the art of composition. He and Music Director Gerard Schwarz look into the score of Rands' recent work \"Adieu\" (\"Goodbye\") as recorded by the All-Star Orchestra.", "node_slug": "bernard-rands-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-masterpieces-old-new/bernard-rands-music", "extended_slug": "humanities/music/music-masterpieces-old-new/bernard-rands-music", "kind": "Topic", "slug": "bernard-rands-music"}], "in_knowledge_map": false, "description": "Discover what makes a masterpiece by learning how classical works are composed. Music Director Gerard Schwarz explains the history, context and compositional techniques behind famous orchestral works, from Beethoven to leading composers of the present day.", "node_slug": "music-masterpieces-old-new", "render_type": "Topic", "topic_page_url": "/humanities/music/music-masterpieces-old-new", "extended_slug": "humanities/music/music-masterpieces-old-new", "kind": "Topic", "slug": "music-masterpieces-old-new"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/music/music-instruments-orchestra/", "id": "music-instruments-orchestra", "hide": false, "title": "Instruments of the orchestra", "child_data": [{"kind": "Topic", "id": "xeb630037"}, {"kind": "Topic", "id": "x3a44b68b"}, {"kind": "Topic", "id": "x1221cb4a"}, {"kind": "Topic", "id": "x111c2394"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-instruments-orchestra/strings-music/", "id": "strings-music", "hide": false, "title": "Strings", "child_data": [{"kind": "Video", "id": "x575a074b"}, {"kind": "Video", "id": "x0ffdfe13"}, {"kind": "Video", "id": "x64989e72"}, {"kind": "Video", "id": "xffd0d2fe"}, {"kind": "Video", "id": "x4bb1e8af"}], "children": [{"path": "khan/humanities/music/music-instruments-orchestra/strings-music/harp-interview-demo/", "id": "m2DBfaL7Zo4", "title": "Harp: Interview and demonstration with principal Nancy Allen", "kind": "Video", "slug": "harp-interview-demo"}, {"path": "khan/humanities/music/music-instruments-orchestra/strings-music/violin-interview-and-demonstration-with-concertmaster-david-kim/", "id": "gvjFMvLVnG0", "title": "Violin: Interview and demonstration with concertmaster David Kim", "kind": "Video", "slug": "violin-interview-and-demonstration-with-concertmaster-david-kim"}, {"path": "khan/humanities/music/music-instruments-orchestra/strings-music/viola-interview-and-demonstration-with-principal-rebecca-young/", "id": "ivbT-wvzK58", "title": "Viola: Interview and demonstration with principal Rebecca Young", "kind": "Video", "slug": "viola-interview-and-demonstration-with-principal-rebecca-young"}, {"path": "khan/humanities/music/music-instruments-orchestra/strings-music/cello-interview-and-demonstration-with-principal-jerry-grossman/", "id": "fJiCHUimtpc", "title": "Cello: Interview and demonstration with principal Jerry Grossman", "kind": "Video", "slug": "cello-interview-and-demonstration-with-principal-jerry-grossman"}, {"path": "khan/humanities/music/music-instruments-orchestra/strings-music/bass-interview-and-demonstration-with-principal-alexander-hanna/", "id": "35sOcVflhE0", "title": "Bass: Interview and demonstration with principal Alexander Hanna", "kind": "Video", "slug": "bass-interview-and-demonstration-with-principal-alexander-hanna"}], "in_knowledge_map": false, "description": "The largest group within the orchestra is comprised of instruments that produce sound from vibrating strings. The vibrations \u2013 resulting from the strings being played by a bow, or being plucked with the fingers \u2013 resonate within the body of each instrument. The violin, viola, cello and contrabass are all primary played with a bow. The harp is plucked and stroked with the hands. Principals from the All-Star Orchestra introduce the special qualities and histories of each instrument.", "node_slug": "strings-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-instruments-orchestra/strings-music", "extended_slug": "humanities/music/music-instruments-orchestra/strings-music", "kind": "Topic", "slug": "strings-music"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-instruments-orchestra/woodwinds-music/", "id": "woodwinds-music", "hide": false, "title": "Woodwinds", "child_data": [{"kind": "Video", "id": "x99c6eddf"}, {"kind": "Video", "id": "xb7c2aa6a"}, {"kind": "Video", "id": "x77e1f586"}, {"kind": "Video", "id": "xaf9a29e3"}, {"kind": "Video", "id": "x2003d66b"}, {"kind": "Video", "id": "xf031a295"}, {"kind": "Video", "id": "xd734f150"}, {"kind": "Video", "id": "x3032e315"}], "children": [{"path": "khan/humanities/music/music-instruments-orchestra/woodwinds-music/piccolo-interview-and-demonstration-with-nadine-asin/", "id": "h7dD-8eD5oA", "title": "Piccolo: Interview and demonstration with Nadine Asin", "kind": "Video", "slug": "piccolo-interview-and-demonstration-with-nadine-asin"}, {"path": "khan/humanities/music/music-instruments-orchestra/woodwinds-music/flute-interview-demo/", "id": "MJIagUN4Lhw", "title": "Flute: Interview and demonstration with principal Jeffrey Khaner", "kind": "Video", "slug": "flute-interview-demo"}, {"path": "khan/humanities/music/music-instruments-orchestra/woodwinds-music/e-flat-clarinet-interview-and-demonstration-with-jessica-phillips-rieske/", "id": "_Ub-jKHFEQg", "title": "E-Flat Clarinet: Interview and demonstration with Jessica Phillips Rieske", "kind": "Video", "slug": "e-flat-clarinet-interview-and-demonstration-with-jessica-phillips-rieske"}, {"path": "khan/humanities/music/music-instruments-orchestra/woodwinds-music/clarinet-interview-and-demonstration-with-principal-jon-manasse/", "id": "0lX34MHTs8E", "title": "Clarinet: Interview and demonstration with principal Jon Manasse", "kind": "Video", "slug": "clarinet-interview-and-demonstration-with-principal-jon-manasse"}, {"path": "khan/humanities/music/music-instruments-orchestra/woodwinds-music/bass-clarinet-interview-and-demonstration-with-james-ognibene/", "id": "oG7C7U3FhhQ", "title": "Bass Clarinet: Interview and demonstration with James Ognibene", "kind": "Video", "slug": "bass-clarinet-interview-and-demonstration-with-james-ognibene"}, {"path": "khan/humanities/music/music-instruments-orchestra/woodwinds-music/oboe-interview/", "id": "HALbfdYE3hM", "title": "Oboe: Interview and demonstration with principal John Ferrillo", "kind": "Video", "slug": "oboe-interview"}, {"path": "khan/humanities/music/music-instruments-orchestra/woodwinds-music/maurice-ravel-daphnis/", "id": "xWvhFIh8AaI", "title": "Bassoon: Interview and demonstration with principal Nancy Goeres", "kind": "Video", "description": "Watch the full performance here (starting at 29:10)", "slug": "maurice-ravel-daphnis"}, {"path": "khan/humanities/music/music-instruments-orchestra/woodwinds-music/english-horn-pedro/", "id": "5flvVD_tnRw", "title": "English Horn: Interview and demonstration with Pedro Diaz", "kind": "Video", "slug": "english-horn-pedro"}], "in_knowledge_map": false, "description": "This family of instruments is situated in the middle of the orchestra, and is comprised of three groups: the flutes (flutes, piccolo), single reeds (clarinets, bass-clarinet), and double reeds (oboe, English horn, bassoons, contra-bassoon) Watch and listen as principal players of the All-Star Orchestra demonstrate their instruments and tell about their musical lives.", "node_slug": "woodwinds-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-instruments-orchestra/woodwinds-music", "extended_slug": "humanities/music/music-instruments-orchestra/woodwinds-music", "kind": "Topic", "slug": "woodwinds-music"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-instruments-orchestra/brass-music/", "id": "brass-music", "hide": false, "title": "Brass", "child_data": [{"kind": "Video", "id": "xbe6c8290"}, {"kind": "Video", "id": "x46207839"}, {"kind": "Video", "id": "xab3dc128"}, {"kind": "Video", "id": "x2d76f265"}, {"kind": "Video", "id": "x1fc09651"}], "children": [{"path": "khan/humanities/music/music-instruments-orchestra/brass-music/french-horn-interview-demo/", "id": "PoHKNFGbwjM", "title": "French Horn: Interview and demonstration with principal John Cerminaro", "kind": "Video", "slug": "french-horn-interview-demo"}, {"path": "khan/humanities/music/music-instruments-orchestra/brass-music/trumpet-interview-and-demonstration-with-principal-david-bilger/", "id": "N1GWZbwh2jQ", "title": "Trumpet: Interview and demonstration with principal David Bilger", "kind": "Video", "slug": "trumpet-interview-and-demonstration-with-principal-david-bilger"}, {"path": "khan/humanities/music/music-instruments-orchestra/brass-music/trombone-interview-and-demonstration-with-principal-joseph-alessi/", "id": "9onC3FwiQeg", "title": "Trombone: Interview and demonstration with principal Joseph Alessi", "kind": "Video", "slug": "trombone-interview-and-demonstration-with-principal-joseph-alessi"}, {"path": "khan/humanities/music/music-instruments-orchestra/brass-music/bass-trombone-interview-and-demonstration-with-denson-paul-pollard/", "id": "p6Ovm_jaeKg", "title": "Bass Trombone: Interview and demonstration with Denson Paul Pollard", "kind": "Video", "slug": "bass-trombone-interview-and-demonstration-with-denson-paul-pollard"}, {"path": "khan/humanities/music/music-instruments-orchestra/brass-music/tuba-interview-and-demonstration-with-chris-olka/", "id": "IOIx0T4vx8c", "title": "Tuba: Interview and demonstration with Chris Olka", "kind": "Video", "slug": "tuba-interview-and-demonstration-with-chris-olka"}], "in_knowledge_map": false, "description": "Each of the instruments in this family are made to sound by the vibrations of the player's lips combined with a steady stream of breath. Learn from the All-Star Orchestra players themselves about the special attributes of the trumpet, French horn, trombone, bass trombone and tuba.", "node_slug": "brass-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-instruments-orchestra/brass-music", "extended_slug": "humanities/music/music-instruments-orchestra/brass-music", "kind": "Topic", "slug": "brass-music"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/music/music-instruments-orchestra/percussion-music/", "id": "percussion-music", "hide": false, "title": "Percussion", "child_data": [{"kind": "Video", "id": "x32b8d131"}, {"kind": "Video", "id": "x218c8d49"}, {"kind": "Video", "id": "x89fe951b"}], "children": [{"path": "khan/humanities/music/music-instruments-orchestra/percussion-music/timpani-interview-and-demonstration-with-principal-jauvon-gilliam/", "id": "-kn_8vUT0eI", "title": "Timpani: Interview and demonstration with principal Jauvon Gilliam", "kind": "Video", "slug": "timpani-interview-and-demonstration-with-principal-jauvon-gilliam"}, {"path": "khan/humanities/music/music-instruments-orchestra/percussion-music/piano-as-orchestral-instrument-interview-and-demonstration-with-kimberly-russ/", "id": "r2syXj4Eb6w", "title": "Piano (as orchestral instrument): Interview and demonstration with Kimberly Russ", "kind": "Video", "slug": "piano-as-orchestral-instrument-interview-and-demonstration-with-kimberly-russ"}, {"path": "khan/humanities/music/music-instruments-orchestra/percussion-music/percussion-interview-and-demonstration-with-principal-chris-devine/", "id": "H235paj_4PE", "title": "Percussion: Interview and demonstration with principal Chris Devine and members of the percussion section", "kind": "Video", "slug": "percussion-interview-and-demonstration-with-principal-chris-devine"}], "in_knowledge_map": false, "description": "This large family, including timpani, drums, cymbals, xylophones, gongs, bells, and rattles, is comprised of musical instruments played by striking with the hand or with a stick or beater, or by shaking or rubbing. The All-Star Orchestra percussion section demonstrates the remarkable variety of sounds that can be produced. Also included in this group are orchestral keyboard instruments like the piano and celesta.", "node_slug": "percussion-music", "render_type": "Tutorial", "topic_page_url": "/humanities/music/music-instruments-orchestra/percussion-music", "extended_slug": "humanities/music/music-instruments-orchestra/percussion-music", "kind": "Topic", "slug": "percussion-music"}], "in_knowledge_map": false, "description": "Learn about the different instruments of the orchestra as they are presented and demonstrated by principal players from famous symphony orchestras.", "node_slug": "music-instruments-orchestra", "render_type": "Topic", "topic_page_url": "/humanities/music/music-instruments-orchestra", "extended_slug": "humanities/music/music-instruments-orchestra", "kind": "Topic", "slug": "music-instruments-orchestra"}], "in_knowledge_map": false, "description": "An exploration of classical music as a living tradition. Top orchestral players from across the United States meet once-a-year in New York as the All-Star Orchestra to record masterpieces and new works with Music Director Gerard Schwarz. Come behind the scenes, meet the musicians, attend an open rehearsal, gain a conductor's perspective, and have a first-person encounter with the music.", "node_slug": "music", "render_type": "Subject", "topic_page_url": "/humanities/music", "extended_slug": "humanities/music", "kind": "Topic", "slug": "music"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-history-basics/", "id": "art-history-basics", "hide": false, "title": "Art history basics", "child_data": [{"kind": "Topic", "id": "x20488a2b"}, {"kind": "Topic", "id": "xb8647689"}, {"kind": "Topic", "id": "x03920bde"}, {"kind": "Topic", "id": "xa1598fb7"}, {"kind": "Topic", "id": "x310cbf1e"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-history-basics/beginners-art-history/", "id": "beginners-art-history", "hide": false, "title": "First things first", "child_data": [{"kind": "Article", "id": "x07dae481"}, {"kind": "Video", "id": "1043985977"}, {"kind": "Article", "id": "1314267931"}, {"kind": "Article", "id": "1314851510"}, {"kind": "Video", "id": "x60e40401"}, {"kind": "Article", "id": "xf4bb6854"}, {"kind": "Article", "id": "xf979ae27"}, {"kind": "Video", "id": "x8684dedb"}, {"kind": "Article", "id": "x3d0bb45f"}], "children": [{"path": "khan/humanities/art-history-basics/beginners-art-history/why-look-at-art/", "id": "0OloYD_kSbU", "title": "Why look at art?", "kind": "Video", "description": "Why look at art? This was the question we posed to several of our colleagues at a conference for museum professionals. Special thanks to Laura Mann, Anna Velez, an anonymous professional, and David Torgersen whose voices and insights are included here.", "slug": "why-look-at-art"}, {"path": "khan/humanities/art-history-basics/beginners-art-history/a-brief-history-of-religion-in-art-ted-ed/", "id": "qfITRYcnP84", "title": "A brief history of religion in art", "kind": "Video", "description": "Before we began putting art into museums, art mostly served as the visual counterpart to religious stories. Are these theological paintings, sculptures, textiles and illuminations from centuries ago still relevant to us? Jeremiah Dickey describes the evolution of art in the public eye and explains how the modern viewer can see the history of art as an ongoing global conversation.", "slug": "a-brief-history-of-religion-in-art-ted-ed"}, {"path": "khan/humanities/art-history-basics/beginners-art-history/is-there-a-difference-between-art-and-craft-laura-morelli/", "id": "tVdw60eCnJI", "title": "Is there a difference between art and craft?", "kind": "Video", "description": "Was da Vinci an artistic genius? Sure, but he was also born in the right place at the right time -- pre-Renaissance, Western artists got little individual credit for their work. And in many non-Western cultures, traditional forms have always been prized over innovation. So, where do we get our notions of art vs. craft? Laura Morelli traces the history of how we assign value to the visual arts. Lesson by Laura Morelli, animation by Sandro Katamashvili.", "slug": "is-there-a-difference-between-art-and-craft-laura-morelli"}], "in_knowledge_map": false, "description": "New to art? This is a good place to start. Art gives us access to the way people at different moments in history have understood the world. Jump in and explore!", "node_slug": "beginners-art-history", "render_type": "Tutorial", "topic_page_url": "/humanities/art-history-basics/beginners-art-history", "extended_slug": "humanities/art-history-basics/beginners-art-history", "kind": "Topic", "slug": "beginners-art-history"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-history-basics/tools-understanding-art/", "id": "tools-understanding-art", "hide": false, "title": "Tools for understanding art", "child_data": [{"kind": "Video", "id": "xcabfc38e"}, {"kind": "Video", "id": "x33974b7c"}, {"kind": "Video", "id": "x3e864d56"}, {"kind": "Video", "id": "xf38d8448"}, {"kind": "Video", "id": "x3b871577"}, {"kind": "Article", "id": "xa12cce53"}, {"kind": "Article", "id": "x73215021"}, {"kind": "Scratchpad", "id": "6647238611828736"}], "children": [{"path": "khan/humanities/art-history-basics/tools-understanding-art/how-art-can-help-you-analyze-amy-e-herman/", "id": "ubEadhXWwV4", "title": "How art can help you analyze", "kind": "Video", "description": "Can art save lives? Not exactly, but our most prized professionals (doctors, nurses, police officers) can learn real world skills through art analysis. Studying art like Ren\u00e9 Magritte's Time Transfixed can enhance communication and analytical skills, with an emphasis on both the seen and unseen. Amy E. Herman explains why art historical training can prepare you for real world investigation. Lesson by Amy E. Herman, animation by Flaming Medusa Studios Inc.", "slug": "how-art-can-help-you-analyze-amy-e-herman"}, {"path": "khan/humanities/art-history-basics/tools-understanding-art/goya-third-may/", "id": "_QM-DfhrNv8", "title": "Art historical analysis (painting), a basic introduction using Goya's Third of May, 1808", "kind": "Video", "description": "Francisco de Goya, Third of May, 1808, 1814, oil on canvas, 266 x 345.1 cm (Museo del Prado. Madrid)", "slug": "goya-third-may"}, {"path": "khan/humanities/art-history-basics/tools-understanding-art/the-body-in-western-sculpture/", "id": "4eNX_xFt-sU", "title": "A brief history of representing of the body in Western sculpture", "kind": "Video", "description": "Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "the-body-in-western-sculpture"}, {"path": "khan/humanities/art-history-basics/tools-understanding-art/the-body-in-western-painting/", "id": "0WxPx3_ZSBI", "title": "A brief history of representing the body in Western painting", "kind": "Video", "description": "Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "the-body-in-western-painting"}, {"path": "khan/humanities/art-history-basics/tools-understanding-art/looking-at-paintings/", "id": "jm8Sva2hnvY", "title": "Looking at paintings", "kind": "Video", "description": "Discover the elements of art seen in such masterpieces as The Dream of Pope Sergius by van der Weyden, La Promenade by Renoir, River Landscape by Koninck, Still Life with Apples by C\u00e9zanne, The Entombment by Rubens, Christ Crowned with Thorns by von Honthorst, Vase of Flowers by van Huysum, and Irises by van Gogh. Love art? Follow us on Google+", "slug": "looking-at-paintings"}], "in_knowledge_map": false, "description": "", "node_slug": "tools-understanding-art", "render_type": "Tutorial", "topic_page_url": "/humanities/art-history-basics/tools-understanding-art", "extended_slug": "humanities/art-history-basics/tools-understanding-art", "kind": "Topic", "slug": "tools-understanding-art"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-history-basics/ah-glossary/", "id": "ah-glossary", "hide": false, "title": "Glossary", "child_data": [{"kind": "Article", "id": "x44e54ac0"}, {"kind": "Video", "id": "x2ce5df17"}, {"kind": "Video", "id": "xbd813a40"}, {"kind": "Article", "id": "xccace7f0"}, {"kind": "Video", "id": "x7375afe4"}, {"kind": "Exercise", "id": "x2ff9041d"}], "children": [{"path": "khan/humanities/art-history-basics/ah-glossary/contrapposto/", "id": "1iTC9cBk6Ac", "title": "Contrapposto", "kind": "Video", "description": "A brief explanation of the term \"contrapposto\" comparing two ancient Greek sculptures: the New York Kouros and an ancient Roman copy of the Doryphoros (or Spear Bearer) by Polykleitos. Although these particular objects may not have been known in the Renaissance, the ideas and form of contrapposto were revived in the Italian Renaissance.\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "contrapposto"}, {"path": "khan/humanities/art-history-basics/ah-glossary/how-one-point-linear-perspective-works/", "id": "eOksHhQ8TLM", "title": "How one-point linear perspective works", "kind": "Video", "description": "Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "how-one-point-linear-perspective-works"}, {"path": "khan/humanities/art-history-basics/ah-glossary/the-classical-orders/", "id": "nrRJkzXl4a4", "title": "The classical orders", "kind": "Video", "description": "A conversation with Dr. Steven Zucker & Dr. Beth Harris\n\nIn classical architecture, the Orders consist of variations of an assembly of parts made up of a column (usually with a base), a capital, and an entablature. These structural units may be repeated and combined to form the elevation of a building and its architectural vocabulary.\n\nThere are eight Orders in total: Doric (Greek and Roman versions), Tuscan, Ionic (Greek and Roman), Corinthian (Greek and Roman), and Composite. The simplest is the Tuscan, supposedly derived from the Etruscan-type temple. It has a base and capital and a plain column. The Doric is probably earlier, however, its Greek version having no base, as on the Parthenon. The Ionic Order, with its twin volute capitals, originated in Asia Minor in the mid-6th century B.C.E. The Corinthian Order was an Athenian invention of the 5th century B.C.E. and was later developed by the Romans. The Composite Order is a late Roman combination of elements from the Ionic and Corinthian Orders.\n\nThe Concise Oxford Dictionary of Art Terms, Michael Clarke, Deborah Clarke. \u00a9 2012 Oxford University Press. Available at Oxford Art OnlineAncient Greece", "slug": "the-classical-orders"}], "in_knowledge_map": false, "description": "", "node_slug": "ah-glossary", "render_type": "Tutorial", "topic_page_url": "/humanities/art-history-basics/ah-glossary", "extended_slug": "humanities/art-history-basics/ah-glossary", "kind": "Topic", "slug": "ah-glossary"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-history-basics/artists-materials-techniques/", "id": "artists-materials-techniques", "hide": false, "title": "The materials and techniques artists use", "child_data": [{"kind": "Topic", "id": "x8ba7406e"}, {"kind": "Topic", "id": "xc087782d"}, {"kind": "Topic", "id": "xcd204ab4"}, {"kind": "Topic", "id": "xfe9deabf"}, {"kind": "Topic", "id": "xfd755bc2"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-history-basics/artists-materials-techniques/ceramics-glass/", "id": "ceramics-glass", "hide": false, "title": "Ceramics, glass and mosaics", "child_data": [{"kind": "Video", "id": "x9f0eb6d5"}, {"kind": "Video", "id": "x5fe9ca9d"}, {"kind": "Video", "id": "xde1d1c5c"}], "children": [{"path": "khan/humanities/art-history-basics/artists-materials-techniques/ceramics-glass/glassmaking-technique-free-blown-glass/", "id": "sqnrJMTp9dc", "title": "Glassmaking technique: free-blown glass", "kind": "Video", "description": "Ancient glass makers near Jerusalem discovered they could inflate hot glass to make vessels quickly and more cheaply. Watch this ancient technique (footage from the Corning Museum of Glass). Love art? Follow us on Google+", "slug": "glassmaking-technique-free-blown-glass"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/ceramics-glass/making-greek-vases/", "id": "WhPW50r07L8", "title": "Making Greek vases", "kind": "Video", "description": "In ancient Greece, the phrase \"to make pottery\" meant to work hard.\u00a0This video from the Getty Museum reveals how the typical Athenian potter prepared clay, threw vases, oversaw firing, and added decoration or employed vase-painters. Love art? Follow us on Google+", "slug": "making-greek-vases"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/ceramics-glass/ancient-and-byzantine-mosaic-materials/", "id": "zPjbiP66-6M", "title": "Ancient and Byzantine mosaic materials", "kind": "Video", "description": "A video from The Art Institute of Chicago", "slug": "ancient-and-byzantine-mosaic-materials"}], "in_knowledge_map": false, "description": "", "node_slug": "ceramics-glass", "render_type": "Tutorial", "topic_page_url": "/humanities/art-history-basics/artists-materials-techniques/ceramics-glass", "extended_slug": "humanities/art-history-basics/artists-materials-techniques/ceramics-glass", "kind": "Topic", "slug": "ceramics-glass"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-history-basics/artists-materials-techniques/sculpture/", "id": "sculpture", "hide": false, "title": "Sculpture", "child_data": [{"kind": "Video", "id": "x01531b07"}, {"kind": "Video", "id": "1044185674"}, {"kind": "Video", "id": "x81fc9897"}, {"kind": "Video", "id": "xed065984"}], "children": [{"path": "khan/humanities/art-history-basics/artists-materials-techniques/sculpture/working-jade/", "id": "d1oO1kbtt4s", "title": "Working jade", "kind": "Video", "description": "This video explores the significance and working of jade in China. Learn more about jade on the Asian Art Museum's education website.", "slug": "working-jade"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/sculpture/quarrying-and-carving-marble/", "id": "MvMI2r1RS78", "title": "Quarrying and carving marble", "kind": "Video", "description": "Quarrying and Carving Marble Speakers: Dr. Beth Harris, Dr. David Drogin", "slug": "quarrying-and-carving-marble"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/sculpture/carving-marble-with-traditional-tools/", "id": "PWUuGDovHEI", "title": "Carving marble with traditional tools", "kind": "Video", "description": "Watch a sculptor demonstrate the use of traditional tools\u2014such as the tooth chisel, the point chisel, the drill, and the rasp\u2014as he creates a finished figure \u00a0from a block of marble. Love art? Follow us on Google+", "slug": "carving-marble-with-traditional-tools"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/sculpture/de-vries-bronze-casting/", "id": "JiofOv18o2M", "title": "Adriaen de Vries's bronze casting technique: direct lost-wax method", "kind": "Video", "description": "Adriaen de Vries, a 17th century Dutch sculptor, often used \"direct lost-wax casting.\" Because the wax is \"lost,\" each bronze cast is unique. If the casting fails, the sculptor begins again. Love art? Follow us on Google+", "slug": "de-vries-bronze-casting"}], "in_knowledge_map": false, "description": "", "node_slug": "sculpture", "render_type": "Tutorial", "topic_page_url": "/humanities/art-history-basics/artists-materials-techniques/sculpture", "extended_slug": "humanities/art-history-basics/artists-materials-techniques/sculpture", "kind": "Topic", "slug": "sculpture"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/", "id": "painting-materials-techniques", "hide": false, "title": "Painting", "child_data": [{"kind": "Video", "id": "1044166966"}, {"kind": "Video", "id": "x88eba800"}, {"kind": "Video", "id": "1044040894"}, {"kind": "Video", "id": "xaa9ddfd6"}, {"kind": "Video", "id": "x12a22158"}, {"kind": "Video", "id": "x84dd2381"}, {"kind": "Video", "id": "xf83b866e"}, {"kind": "Video", "id": "x4b47940f"}, {"kind": "Video", "id": "xda2d5d30"}, {"kind": "Video", "id": "x30d479f1"}, {"kind": "Video", "id": "xba8b678d"}, {"kind": "Video", "id": "xdc39a0f1"}, {"kind": "Video", "id": "xb4a16b8e"}], "children": [{"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/tempera-paint/", "id": "YqTbqKCiYJw", "title": "Tempera paint", "kind": "Video", "description": "Speakers: Dr. David Drogin and Dr. Steven Zucker", "slug": "tempera-paint"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/gold-ground-panel-painting/", "id": "WVyusmjiTXI", "title": "Gold-ground panel painting", "kind": "Video", "description": "Wood panel was the support most often used for painting before canvas replaced it at the end of the 1500s. Artists applied gold ground and expensive pigments to the most splendid panel paintings. Love art? Follow us on Google+", "slug": "gold-ground-panel-painting"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/oil-paint/", "id": "9dbb6oITDa0", "title": "Oil paint", "kind": "Video", "description": "Speakers: Dr. Steven Zucker, Isaac Peterson, Dr. Beth Harris", "slug": "oil-paint"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/oil-paint-in-venice/", "id": "lG6NWLxDbNo", "title": "Oil paint in Venice", "kind": "Video", "description": "A review of fresco and tempera and the development of the use of\u00a0oil paint by artists in Venice.", "slug": "oil-paint-in-venice"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-paint/", "id": "R2cCoswXvZA", "title": "Art Terms in Action: Paint", "kind": "Video", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-art-term-paint"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-viscosity/", "id": "N8GQQJZQrUc", "title": "Art Terms in Action: Viscosity", "kind": "Video", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-art-term-viscosity"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-tint-shade-tone/", "id": "q7STpNRwzzc", "title": "Art Terms in Action: Tint, Shade, and Tone", "kind": "Video", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-art-term-tint-shade-tone"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-enamel/", "id": "koL4adsku1g", "title": "Art Terms in Action: Enamel", "kind": "Video", "description": "Learn the properties of enamel paint and why artists use it. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-art-term-enamel"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-emulsion/", "id": "GpBD_1pT_mw", "title": "Art Terms in Action: Emulsion", "kind": "Video", "description": "Learn why Willem de Kooning added raw egg to his paint. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-art-term-emulsion"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-stain/", "id": "0OrF-ls7wmM", "title": "Art Terms in Action: Stain", "kind": "Video", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-art-term-stain"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-palette-knife/", "id": "ajeETSrukxY", "title": "Art Terms in Action: Palette Knife", "kind": "Video", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-art-term-palette-knife"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-art-term-turpentine-burn/", "id": "fsaRisPpzjU", "title": "Art Terms in Action: Turpentine Burn", "kind": "Video", "description": "Abstract Expressionist New York - To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-art-term-turpentine-burn"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques/moma-framing-christinas-world/", "id": "S6d5oAS-jUc", "title": "Framing \"Christina's World\" by Andrew Wyeth", "kind": "Video", "description": "Though we might not notice it, frames affect how we see a painting. To learn about how art changes over time, enroll in one of MoMA's courses online.", "slug": "moma-framing-christinas-world"}], "in_knowledge_map": false, "description": "", "node_slug": "painting-materials-techniques", "render_type": "Tutorial", "topic_page_url": "/humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques", "extended_slug": "humanities/art-history-basics/artists-materials-techniques/painting-materials-techniques", "kind": "Topic", "slug": "painting-materials-techniques"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-history-basics/artists-materials-techniques/printmaking/", "id": "printmaking", "hide": false, "title": "Printmaking", "child_data": [{"kind": "Video", "id": "x1bec64c9"}, {"kind": "Video", "id": "xc00f8154"}, {"kind": "Video", "id": "x7b3f8943"}, {"kind": "Video", "id": "x82aec1aa"}, {"kind": "Video", "id": "x5ece2d25"}, {"kind": "Video", "id": "xcecc0a45"}, {"kind": "Video", "id": "xee2d1bbb"}], "children": [{"path": "khan/humanities/art-history-basics/artists-materials-techniques/printmaking/moma-printmaking-01/", "id": "-BYHn5Vum_A", "title": "Introduction to printmaking", "kind": "Video", "description": "Learn about the main types of printmaking: relief, intaglio and lithography. Did you know that MoMA offers studio courses online? Check out the list of offerings including online courses on collage and painting techniques.", "slug": "moma-printmaking-01"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/printmaking/moma-relief-printmaking/", "id": "lR8yK_aKb2Q", "title": "Introduction to relief printmaking", "kind": "Video", "description": "Discover how artists create different effects with linocuts and woodcuts. Did you know that MoMA offers studio courses online? Check out the list of offerings including online courses on collage and painting techniques.", "slug": "moma-relief-printmaking"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/printmaking/moma-relief-process/", "id": "Bjymxow3TVQ", "title": "Relief process", "kind": "Video", "description": "Discover how artists create different effects with linocuts and woodcuts. Did you know that MoMA offers studio courses online? Check out the\u00a0list\u00a0of offerings including online courses on collage and painting techniques.", "slug": "moma-relief-process"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/printmaking/moma-intro-to-intaglio/", "id": "4Q2oqG6S4Mk", "title": "Introduction to intaglio", "kind": "Video", "description": "What's the difference between etching and drypoint?\u00a0Did you know that MoMA offers studio courses online?\u00a0Check out the\u00a0list\u00a0of offerings including online courses on collage and painting techniques.", "slug": "moma-intro-to-intaglio"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/printmaking/moma-intaglio-process/", "id": "VRwWJyy24So", "title": "Intaglio process", "kind": "Video", "description": "Learn how artists scratch and etch metal plates to create fine surface detail. Did you know that MoMA offers studio courses online? Check out the list of offerings including online courses on collage and painting techniques.", "slug": "moma-intaglio-process"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/printmaking/moma-intro-to-lithography/", "id": "G-PFEbQ5UGc", "title": "Introduction to lithography", "kind": "Video", "description": "Find out how artists use the resistance of grease and water to create lithographs. Did you know that MoMA offers studio courses online? To learn more, check out the list of online course offerings.", "slug": "moma-intro-to-lithography"}, {"path": "khan/humanities/art-history-basics/artists-materials-techniques/printmaking/moma-lithography-process/", "id": "nUXDltQfqSA", "title": "Lithography process", "kind": "Video", "description": "Learn how the lithographic process maintains the subtle hand of the artist. Did you know that MoMA offers studio courses online? To learn more, check out the list of online course offerings.", "slug": "moma-lithography-process"}], "in_knowledge_map": false, "description": "", "node_slug": "printmaking", "render_type": "Tutorial", "topic_page_url": "/humanities/art-history-basics/artists-materials-techniques/printmaking", "extended_slug": "humanities/art-history-basics/artists-materials-techniques/printmaking", "kind": "Topic", "slug": "printmaking"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/art-history-basics/artists-materials-techniques/materials-techniques-quiz/", "id": "materials-techniques-quiz", "hide": false, "title": "Quiz: materials and techniques", "child_data": [{"kind": "Exercise", "id": "x82d2c982"}], "children": [{"path": "khan/humanities/art-history-basics/artists-materials-techniques/materials-techniques-quiz/art-history-media/", "id": "art-history-media", "title": "Materials and techniques (quiz)", "description": "Test your comprehension of the different mediums that artists use.", "slug": "art-history-media", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "materials-techniques-quiz", "render_type": "Tutorial", "topic_page_url": "/humanities/art-history-basics/artists-materials-techniques/materials-techniques-quiz", "extended_slug": "humanities/art-history-basics/artists-materials-techniques/materials-techniques-quiz", "kind": "Topic", "slug": "materials-techniques-quiz"}], "in_knowledge_map": false, "description": "Learn how the ancient Greeks fired their ceramics, how renaissance artists created luminous oil paintings and the techniques developed by modern masters.", "node_slug": "artists-materials-techniques", "render_type": "Topic", "topic_page_url": "/humanities/art-history-basics/artists-materials-techniques", "extended_slug": "humanities/art-history-basics/artists-materials-techniques", "kind": "Topic", "slug": "artists-materials-techniques"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-history-basics/art-1010/", "id": "Art-1010", "hide": false, "title": "Art 1010", "child_data": [{"kind": "Video", "id": "1360981775"}, {"kind": "Video", "id": "x23435cb1"}, {"kind": "Video", "id": "1362677138"}, {"kind": "Video", "id": "xfaba2331"}, {"kind": "Video", "id": "x6f6c1dc9"}, {"kind": "Video", "id": "xa1056327"}, {"kind": "Video", "id": "xe8e77917"}, {"kind": "Video", "id": "xd6e989bc"}], "children": [{"path": "khan/humanities/art-history-basics/art-1010/ancient-near-eastern-and-ancient-egyptian-art/", "id": "A_8yPgC9zQc", "title": "Ancient Near Eastern and ancient Egyptian art", "kind": "Video", "description": "From the Utah System of Higher Education (with special thanks to Dr. Nancy Ross). Video by Ydraw.", "slug": "ancient-near-eastern-and-ancient-egyptian-art"}, {"path": "khan/humanities/art-history-basics/art-1010/greek-and-roman-art/", "id": "XdXXK_PTkUU", "title": "Ancient Greek and Roman art", "kind": "Video", "description": "From the Utah System of Higher Education (with special thanks to Dr. Nancy Ross). Video by Ydraw.", "slug": "greek-and-roman-art"}, {"path": "khan/humanities/art-history-basics/art-1010/tice-art-1010-medieval-and-byzantine-art-mp4/", "id": "UpGsouOnxOU", "title": "Medieval and Byzantine art", "kind": "Video", "description": "A video from the Utah System of Higher Education (with special thanks to Dr. Nancy Ross). Video by Ydraw.", "slug": "tice-art-1010-medieval-and-byzantine-art-mp4"}, {"path": "khan/humanities/art-history-basics/art-1010/renaissance-art-introduction/", "id": "kzhuZmzoX5o", "title": "Renaissance art", "kind": "Video", "description": "This is the Renaissance Art overview video for TICE ART 1010, a video from the Utah System of Higher Education", "slug": "renaissance-art-introduction"}, {"path": "khan/humanities/art-history-basics/art-1010/baroque-rococo-introduction/", "id": "lfRt0Y7e5Ow", "title": "Baroque and Rococo", "kind": "Video", "description": "A video from the Utah System of Higher Education (with special thanks to Dr. Nancy Ross)", "slug": "baroque-rococo-introduction"}, {"path": "khan/humanities/art-history-basics/art-1010/19-century-art/", "id": "XdYgyO0RmFI", "title": "Nineteenth-century art", "kind": "Video", "description": "A video from the Utah System of Higher Education (with special thanks to Dr. Nancy Ross)", "slug": "19-century-art"}, {"path": "khan/humanities/art-history-basics/art-1010/20-century-art/", "id": "DPIAVBv5iH4", "title": "Introduction to Twentieth-Century Art", "kind": "Video", "description": "A video from the Utah System of Higher Education (with special thanks to Dr. Nancy Ross)", "slug": "20-century-art"}, {"path": "khan/humanities/art-history-basics/art-1010/contemporary-art-intro/", "id": "SgKCGwSdCMo", "title": "Introduction to Contemporary Art", "kind": "Video", "description": "A video from the Utah System of Higher Education (with special thanks to Dr. Nancy Ross)", "slug": "contemporary-art-intro"}], "in_knowledge_map": false, "description": "Art 1010 is a short series of fun (and funny) animations created for the Utah System of Higher Education that introduce the history of Western art.", "node_slug": "Art-1010", "render_type": "Tutorial", "topic_page_url": "/humanities/art-history-basics/Art-1010", "extended_slug": "humanities/art-history-basics/Art-1010", "kind": "Topic", "slug": "art-1010"}], "in_knowledge_map": false, "description": "We understand the history of humanity through art. From prehistoric depictions of woolly mammoths to contemporary abstraction, artists have addressed their time and place in history and have expressed universal human truths for tens of thousands of years. Learn what made Rome great, how Islamic tile work evolved, why the Renaissance happened, and about the brilliant art being produced today around the globe. Dr. Beth Harris and Dr. Steven Zucker of Smarthistory together with leading art historians, and our museum partners have created hundreds of short engaging conversational videos and articles, making Khan Academy one of the most accessible and extensive resources for the study of the history of art.", "node_slug": "art-history-basics", "render_type": "Subject", "topic_page_url": "/humanities/art-history-basics", "extended_slug": "humanities/art-history-basics", "kind": "Topic", "slug": "art-history-basics"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/prehistoric-art/", "id": "prehistoric-art", "hide": false, "title": "Prehistoric art in Europe and West Asia", "child_data": [{"kind": "Topic", "id": "x2f99ebba"}, {"kind": "Topic", "id": "x87739bef"}, {"kind": "Topic", "id": "xd631e3e3"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/prehistoric-art/paleolithic-art/", "id": "paleolithic-art", "hide": false, "title": "Paleolithic art", "child_data": [{"kind": "Article", "id": "xc130048e"}, {"kind": "Article", "id": "x178f631a"}, {"kind": "Article", "id": "x0d194220"}, {"kind": "Video", "id": "808489127"}, {"kind": "Article", "id": "x51523b8c"}, {"kind": "Exercise", "id": "xe4d9479e"}, {"kind": "Article", "id": "x93de4621"}], "children": [{"path": "khan/humanities/prehistoric-art/paleolithic-art/nude-woman-venus-of-willendorf-c-28-000-25-000-b-c-e/", "id": "ENAZqOoOVaI", "title": "Nude woman (Venus of Willendorf)", "kind": "Video", "description": "Nude Woman (Venus of Willendorf), c. 28,000-25,000 B.C.E., Limestone, 4 1/4\" high (Naturhistorisches Museum, Vienna)", "slug": "nude-woman-venus-of-willendorf-c-28-000-25-000-b-c-e"}, {"path": "khan/humanities/prehistoric-art/paleolithic-art/nude-woman-venus-of-willendorf-quiz/", "id": "nude-woman--venus-of-willendorf--quiz", "title": "Nude woman (Venus of Willendorf) (quiz)", "description": "Test your knowledge.", "slug": "nude-woman-venus-of-willendorf-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Humans make art. We do this for many reasons and with whatever technologies are available to us. But can we really know what such ancient images originally meant?", "node_slug": "paleolithic-art", "render_type": "Tutorial", "topic_page_url": "/humanities/prehistoric-art/paleolithic-art", "extended_slug": "humanities/prehistoric-art/paleolithic-art", "kind": "Topic", "slug": "paleolithic-art"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/prehistoric-art/neolithic-art/", "id": "neolithic-art", "hide": false, "title": "Neolithic art", "child_data": [{"kind": "Article", "id": "xe7f5ca0a"}, {"kind": "Article", "id": "xfbfa2316"}, {"kind": "Article", "id": "x200ac5b3"}, {"kind": "Video", "id": "xc5cb3173"}, {"kind": "Article", "id": "x654c7a36"}, {"kind": "Video", "id": "xe9345924"}], "children": [{"path": "khan/humanities/prehistoric-art/neolithic-art/susa-ibex/", "id": "eeNfDr4ojZg", "title": "Bushel with ibex motifs", "kind": "Video", "description": "Bushel with ibex motifs, 4200--3500 B.C.E., Susa I period, necropolis, acropolis mound, Susa, Iran, painted terra-cotta, 28.90 x 16.40 cm, excavations led by Jacques de Morgan, 1906-08 (Mus\u00e9e du Louvre, Paris)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "susa-ibex"}, {"path": "khan/humanities/prehistoric-art/neolithic-art/stonehenge-unesconhk/", "id": "h0J_RnRILJ0", "title": "Stonehenge, Avebury and Associated Sites (UNESCO/NHK)", "kind": "Video", "description": "Stonehenge and Avebury, in Wiltshire, are among the most famous groups of megaliths in the world. The two sanctuaries consist of circles of menhirs arranged in a pattern whose astronomical significance is still being explored. These holy places and the nearby Neolithic sites are an incomparable testimony to prehistoric times. Source: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai URL: http://whc.unesco.org/en/list/373/", "slug": "stonehenge-unesconhk"}], "in_knowledge_map": false, "description": "The Neolithic Revolution was the most important development in human history. The way we live today\u2014settled in cities, protected by laws, eating food from farms\u2014dates from approximately 10,000 years ago.", "node_slug": "neolithic-art", "render_type": "Tutorial", "topic_page_url": "/humanities/prehistoric-art/neolithic-art", "extended_slug": "humanities/prehistoric-art/neolithic-art", "kind": "Topic", "slug": "neolithic-art"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/prehistoric-art/quiz-prehistoric/", "id": "quiz-prehistoric", "hide": false, "title": "Quiz: prehistoric art", "child_data": [{"kind": "Exercise", "id": "x2ebba62e"}], "children": [{"path": "khan/humanities/prehistoric-art/quiz-prehistoric/prehistoric-art-quiz/", "id": "prehistoric-art-quiz", "title": "Quiz: Prehistoric art", "description": "Test your knowledge!", "slug": "prehistoric-art-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "quiz-prehistoric", "render_type": "Tutorial", "topic_page_url": "/humanities/prehistoric-art/quiz-prehistoric", "extended_slug": "humanities/prehistoric-art/quiz-prehistoric", "kind": "Topic", "slug": "quiz-prehistoric"}], "in_knowledge_map": false, "description": "Cave paintings, the Venus of Willendorf, Stonehenge, and more.", "node_slug": "prehistoric-art", "render_type": "Subject", "topic_page_url": "/humanities/prehistoric-art", "extended_slug": "humanities/prehistoric-art", "kind": "Topic", "slug": "prehistoric-art"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/", "id": "ancient-art-civilizations", "hide": false, "title": "Art of the ancient Mediterranean", "child_data": [{"kind": "Topic", "id": "xd3501f68"}, {"kind": "Topic", "id": "x31787f7b"}, {"kind": "Topic", "id": "x36bc4536"}, {"kind": "Topic", "id": "x259210e3"}, {"kind": "Topic", "id": "x080dcdf9"}, {"kind": "Topic", "id": "x9b53486d"}, {"kind": "Topic", "id": "x40d9b61f"}, {"kind": "Topic", "id": "x62132e56"}, {"kind": "Topic", "id": "x10169e6f"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/", "id": "ancient-near-east1", "hide": false, "title": "Ancient Near East", "child_data": [{"kind": "Topic", "id": "x3637bc7f"}, {"kind": "Topic", "id": "xbbbd50ba"}, {"kind": "Topic", "id": "xae9d57f8"}, {"kind": "Topic", "id": "x024a6bfd"}, {"kind": "Topic", "id": "xf20f7126"}, {"kind": "Topic", "id": "xad8471f1"}, {"kind": "Topic", "id": "x16517f7d"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/sumerian/", "id": "sumerian", "hide": false, "title": "Sumerian", "child_data": [{"kind": "Article", "id": "x6099d872"}, {"kind": "Article", "id": "x7fafe941"}, {"kind": "Article", "id": "x018da978"}, {"kind": "Article", "id": "x96233607"}, {"kind": "Video", "id": "xf15c4776"}, {"kind": "Article", "id": "xee37fed9"}, {"kind": "Video", "id": "x78ed8a4b"}, {"kind": "Article", "id": "xc1f9428c"}, {"kind": "Video", "id": "820630129"}, {"kind": "Exercise", "id": "x16c290f6"}, {"kind": "Article", "id": "xe1b53d52"}, {"kind": "Article", "id": "x7aa1b162"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/sumerian/cuneiform/", "id": "HbZ2asfyHcA", "title": "Writing Cuneiform", "kind": "Video", "description": "Excerpt from the film The Cyrus Cylinder", "slug": "cuneiform"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/sumerian/standing-male-worshipper/", "id": "DKMWS9qJ_1U", "title": "Standing Male Worshipper from Tell Asmar", "kind": "Video", "description": "Standing Male Worshipper (votive figure), c. 2900-2600 B.C.E., from the Square Temple at Eshnunna (modern Tell Asmar, Iraq), Sumerian, Early Dynastic I-II, gypsum alabaster, shell, black limestone, bitumen, 11 5/8 x 5 1/8 x 3 7/8 inches / 29.5 x 10 cm (The Metropolitan Museum of Art). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "standing-male-worshipper"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/sumerian/standard-of-ur-c-2600-2400-b-c-e/", "id": "Nok4cBt0V6w", "title": "Standard of Ur from the Royal Tombs at Ur", "kind": "Video", "description": "Standard of Ur, c. 2600-2400 B.C.E., 21.59 x 49.5 x 12 cm (British Museum) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "standard-of-ur-c-2600-2400-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/sumerian/standard-of-ur-quiz/", "id": "standard-of-ur-quiz", "title": "Standard of Ur (quiz)", "description": "Test your knowledge!", "slug": "standard-of-ur-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We sometimes use the word \"Ur\" to speak of the origin of something (for example, \"Adam spoke the ur-language\"). In fact, Ur was an actual Sumerian city and we can go back there to learn about the origin of writing, cities, and even civilization. Ur really was the ur-Ur.", "node_slug": "sumerian", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/ancient-near-east1/sumerian", "extended_slug": "humanities/ancient-art-civilizations/ancient-near-east1/sumerian", "kind": "Topic", "slug": "sumerian"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/akkadian/", "id": "akkadian", "hide": false, "title": "Akkadian", "child_data": [{"kind": "Article", "id": "x87a6ff3f"}, {"kind": "Video", "id": "671422820"}, {"kind": "Exercise", "id": "x0b543ef7"}, {"kind": "Video", "id": "x09131e64"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/akkadian/victory-stele-of-naram-sin-2254-2218-b-c-e/", "id": "OY79AuGZDNI", "title": "Victory Stele of Naram-Sin", "kind": "Video", "description": "Victory Stele of Naram-Sin, Akkadian, pink limestone, 2254-2218 B.C.E. (Louvre, Paris) This monument depicts the Akkadian victory over the Lullubi Mountain people. In the 12th century B.C.E., 1,000 years after it was originally made, the Elamite king, Shutruk-Nahhunte, attacked Babylon and, according to his later inscription, the stele was taken to Susa in what is now Iran. A stele is a vertical stone monument or marker often inscribed with text or relief carving. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "victory-stele-of-naram-sin-2254-2218-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/akkadian/victory-stele-of-naram-sin-quiz/", "id": "victory-stele-of-naram-sin-quiz", "title": "Victory Stele of Naram Sin (quiz)", "description": "Test your knowledge.", "slug": "victory-stele-of-naram-sin-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/akkadian/sealed/", "id": "GpZYCOFAI_4", "title": "Cylinder seal and modern impression: nude bearded hero wrestling with a water buffalo; bull-man wrestling with lion", "kind": "Video", "description": "Met curator Yelena Rakic on reading into Cylinder seal and modern impression: nude bearded hero wrestling with a water buffalo; bull-man wrestling with lion from Mesopotamia, \u00a0c. 2250\u20132150 B.C.E.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, try this and also visit\u00a0Find an Educator Resource.", "slug": "sealed"}], "in_knowledge_map": false, "description": "Think Sargon and Narim-sin, the Akkadians ruled most of Mesopotamia for centuries a really long time ago.", "node_slug": "akkadian", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/ancient-near-east1/akkadian", "extended_slug": "humanities/ancient-art-civilizations/ancient-near-east1/akkadian", "kind": "Topic", "slug": "akkadian"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/babylonian/", "id": "babylonian", "hide": false, "title": "Babylonian", "child_data": [{"kind": "Article", "id": "x069f86ac"}, {"kind": "Video", "id": "x18feab9a"}, {"kind": "Article", "id": "xee95d52f"}, {"kind": "Article", "id": "x398e7b17"}, {"kind": "Video", "id": "671260980"}, {"kind": "Exercise", "id": "x6ce600f9"}, {"kind": "Article", "id": "xa797c47b"}, {"kind": "Article", "id": "x9750abf5"}, {"kind": "Video", "id": "719474980"}, {"kind": "Exercise", "id": "x65e86418"}, {"kind": "Video", "id": "x6ab99001"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/babylonian/babylonian-mind/", "id": "G37qpVUzB1g", "title": "The Babylonian mind", "kind": "Video", "description": "Trace the legacy of Babylonian discoveries and ideas, including their mathematical system based on 60 and their desire to predict the future. With British Museum curator Irving Finkel. \u00a9 Trustees of the British Museum", "slug": "babylonian-mind"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/babylonian/law-code-stele-of-king-hammurabi-792-1750-b-c-e/", "id": "_w5NGOHbgTw", "title": "Law code of Hammurabi", "kind": "Video", "description": "Law Code Stele of King Hammurabi, basalt, Babylonian, 1792-1750 B.C.E. (Mus\u00e9e du Louvre, Paris) A stele is a vertical stone monument or marker often inscribed with text or with relief carving. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "law-code-stele-of-king-hammurabi-792-1750-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/babylonian/law-code-of-hammurabi-quiz/", "id": "law-code-of-hammurabi-quiz", "title": "Law Code of Hammurabi (quiz)", "description": "Test your knowledge.", "slug": "law-code-of-hammurabi-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/babylonian/ishtar-gate-and-processional-way-reconstruction-babylon-c-575-b-c-e/", "id": "U2iZ83oIZH0", "title": "Ishtar gate and Processional Way", "kind": "Video", "description": "Reconstruction of the Ishtar Gate and Processional Way, Babylon, c. 575 B.C.E., glazed mud brick (Pergamon Museum, Berlin)", "slug": "ishtar-gate-and-processional-way-reconstruction-babylon-c-575-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/babylonian/ishtar-gate-quiz/", "id": "ishtar-gate-quiz", "title": "Ishtar Gate (quiz)", "description": "Test your knowledge.", "slug": "ishtar-gate-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/babylonian/towers-of-babel/", "id": "iUotrPxq2pU", "title": "Towers of Babel", "kind": "Video", "description": "British Museum curator Irving Finkel \u00a9 Trustees of the British Museum", "slug": "towers-of-babel"}], "in_knowledge_map": false, "description": "For two thousand years the myth of Babylon has haunted the European imagination. The Tower of Babel and the Hanging Gardens, Belshazzar\u2019s Feast and the Fall of Babylon have inspired artists, writers, poets, philosophers and film makers. Learn here about the source of these myths, Babylonia itself.", "node_slug": "babylonian", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/ancient-near-east1/babylonian", "extended_slug": "humanities/ancient-art-civilizations/ancient-near-east1/babylonian", "kind": "Topic", "slug": "babylonian"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/assyrian/", "id": "assyrian", "hide": false, "title": "Assyrian", "child_data": [{"kind": "Article", "id": "x94925688"}, {"kind": "Article", "id": "xf76b02bf"}, {"kind": "Video", "id": "xe58aac02"}, {"kind": "Video", "id": "x9e2c3f9f"}, {"kind": "Exercise", "id": "x613462c4"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/assyrian/lamassu/", "id": "2GrvBLKaRSI", "title": "Lamassu from the citadel of Sargon II", "kind": "Video", "description": "Lamassu (winged human-headed bulls possibly lamassu or shedu) from the citadel of Sargon II, Dur Sharrukin (now Khorsabad, Iraq), Neo-Assyrian, c. 720-705 B.C.E., gypseous alabaster, 4.20 x 4.36 x 0.97 m, excavated by P.-E. Botta 1843-44 (Mus\u00e9e du Louvre)\u00a0Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nIN THE NEWS: Irreplaceable Lamassu sculpture, Assyrian\u00a0architecture and whole archaeological sites have recently been destroyed by militants that control large areas of\u00a0Iraq and Syria. This tragedy cannot be undone and is an attack on our shared\u00a0history and cultural heritage. To learn more: February 27, 2015 New York Times article", "slug": "lamassu"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/assyrian/ashurbanipal-hunting-lions-assyrian/", "id": "J5iEY4hapMQ", "title": "Ashurbanipal hunting lions", "kind": "Video", "description": "Ashurbanipal Hunting Lions, gypsum hall relief from the North Palace, Ninevah, c. 645-635 B.C.E., excavated by H. Rassam beginning in 1853 (British Museum)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "ashurbanipal-hunting-lions-assyrian"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/assyrian/ashurbanipal-hunting-lions-quiz/", "id": "ashurbanipal-hunting-lions-quiz", "title": "Ashurbanipal hunting lions (quiz)", "description": "Test your knowledge!", "slug": "ashurbanipal-hunting-lions-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The Assyrian empire dominated Mesopotamia and all of the Near East for the first half of the first millennium, led by a series of highly ambitious and aggressive warrior kings. The culture of the Assyrians was brutal, the army seldom marching on the battlefield but rather terrorizing opponents into submission who, once conquered, were tortured, raped, beheaded, and flayed with their corpses publicly displayed. The Assyrians torched enemies' houses, salted their fields, and cut down their orchards.", "node_slug": "assyrian", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/ancient-near-east1/assyrian", "extended_slug": "humanities/ancient-art-civilizations/ancient-near-east1/assyrian", "kind": "Topic", "slug": "assyrian"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/persian/", "id": "persian", "hide": false, "title": "Persian", "child_data": [{"kind": "Article", "id": "x999b1c15"}, {"kind": "Video", "id": "x5d4ec510"}, {"kind": "Video", "id": "xe610702a"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/persian/cyrus-cylinder/", "id": "iokGgmrOj4Q", "title": "The Cyrus Cylinder and Ancient Persia", "kind": "Video", "description": "The Cyrus Cylinder is one of the most famous objects to have survived from the ancient world. It was inscribed in Babylonian cuneiform on the orders of Persian King Cyrus the Great (559-530 B.C.E.) after he captured Babylon in 539 B.C.E.\u00a0It was found in Babylon in modern Iraq in 1879 during a British Museum excavation.\nCyrus claims to have achieved this with the aid of Marduk, the god of Babylon. He then describes measures of relief he brought to the inhabitants of the city, and tells how he returned a number of images of gods, which Nabonidus had collected in Babylon, to their proper temples throughout Mesopotamia and western Iran. At the same time he arranged for the restoration of these temples, and organized the return to their homelands of a number of people who had been held in Babylonia by the Babylonian kings. Although the Jews are not mentioned in this document, their return to Palestine following their deportation by Nebuchadnezzar II, was part of this policy.\n\nThe cylinder is often referred to as the first bill of human rights as it appears to encourage freedom of worship throughout the Persian Empire and to allow deported people to return to their homelands, but it in fact reflects a long tradition in Mesopotamia where, from as early as the third millennium B.C.E., kings began their reigns with declarations of reforms.", "slug": "cyrus-cylinder"}, {"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/persian/bull-capital-susa/", "id": "mjxCTApdX3Q", "title": "Capital of a column from the audience hall of the palace of Darius I, Susa", "kind": "Video", "description": "Capital of a column from the audience hall of the palace of Darius I, Susa, c. 510 B.C.E., \u00a0Achaemenid, \u00a0Tell of the Apadana, Susa, Iran (Louvre)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "bull-capital-susa"}], "in_knowledge_map": false, "description": "Western histories often looked at the Persians only in relation to their confrontations with the ancient Greeks, but the Persian empire was long-lived, complex and sophisticated. The heart of ancient Persia is in what is now southwest Iran. In the second half of the 6th century B.C.E., the Persians created an enormous empire reaching from the Indus Valley to Northern Greece and from Central Asia to Egypt.", "node_slug": "persian", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/ancient-near-east1/persian", "extended_slug": "humanities/ancient-art-civilizations/ancient-near-east1/persian", "kind": "Topic", "slug": "persian"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/quiz-ancient-near-eastern-art/", "id": "quiz-ancient-near-eastern-art", "hide": false, "title": "Quiz: Ancient Near Eastern art", "child_data": [{"kind": "Exercise", "id": "x909abe64"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/ancient-near-east1/quiz-ancient-near-eastern-art/ancient-near-eastern-art/", "id": "ancient-near-eastern-art", "title": "Ancient Near Eastern art (quiz)", "description": "Test your knowledge!", "slug": "ancient-near-eastern-art", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "quiz-ancient-near-eastern-art", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/ancient-near-east1/quiz-ancient-near-eastern-art", "extended_slug": "humanities/ancient-art-civilizations/ancient-near-east1/quiz-ancient-near-eastern-art", "kind": "Topic", "slug": "quiz-ancient-near-eastern-art"}], "in_knowledge_map": false, "description": "Ancient Near Eastern cultures established the first cities, the earliest code of laws, and the oldest known writing which was used, not for poetry, but for bookkeeping.", "node_slug": "ancient-near-east1", "render_type": "Topic", "topic_page_url": "/humanities/ancient-art-civilizations/ancient-near-east1", "extended_slug": "humanities/ancient-art-civilizations/ancient-near-east1", "kind": "Topic", "slug": "ancient-near-east1"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/egypt-art/", "id": "egypt-art", "hide": false, "title": "Egyptian art and culture", "child_data": [{"kind": "Topic", "id": "x787458e2"}, {"kind": "Topic", "id": "xf96c736b"}, {"kind": "Topic", "id": "x4330eb8e"}, {"kind": "Topic", "id": "xae3663b8"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/egypt-art/predynastic-old-kingdom/", "id": "predynastic-old-kingdom", "hide": false, "title": "Predynastic and Old Kingdom", "child_data": [{"kind": "Article", "id": "xde82521a"}, {"kind": "Exercise", "id": "x11d31749"}, {"kind": "Article", "id": "x9706e999"}, {"kind": "Article", "id": "xfc56f636"}, {"kind": "Article", "id": "xb1878887"}, {"kind": "Article", "id": "x7bf2d89a"}, {"kind": "Article", "id": "x62f7a62c"}, {"kind": "Exercise", "id": "x9a7bdbf4"}, {"kind": "Video", "id": "671563196"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/egypt-art/predynastic-old-kingdom/palette-of-narmer-quiz/", "id": "palette-of-narmer-quiz", "title": "Palette of Narmer (quiz)", "description": "Test your knowledge.", "slug": "palette-of-narmer-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/predynastic-old-kingdom/the-great-pyramids-at-giza-quiz/", "id": "the-great-pyramids-at-giza-quiz", "title": "The Great Pyramids at Giza (quiz)", "description": "Test your knowledge.", "slug": "the-great-pyramids-at-giza-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/predynastic-old-kingdom/the-seated-scribe-c-2620-2500-b-c-e/", "id": "cxs1d3N60UI", "title": "Old Kingdom: Seated Scribe", "kind": "Video", "description": "The Seated Scribe\u200b, c. 2620-2500 B.C.E., c. 4th Dynasty, Old Kingdom, painted limestone with rock crystal, magnesite, and copper/arsenic inlay for the eyes and wood for the nipples, found in Saqqara (Mus\u00e9e du Louvre, Paris). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "the-seated-scribe-c-2620-2500-b-c-e"}], "in_knowledge_map": false, "description": "While today we consider the Greco-Roman period to be in the distant past, it should be noted that Cleopatra VII's reign (which ended in 30 B.C.E.) is closer to our own time than it was to that of the construction of the pyramids of Giza. It took humans nearly 4000 years to build something--anything--taller than the Great Pyramids. Contrast that span to the modern era; we get excited when a sports record lasts longer than a decade.", "node_slug": "predynastic-old-kingdom", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/egypt-art/predynastic-old-kingdom", "extended_slug": "humanities/ancient-art-civilizations/egypt-art/predynastic-old-kingdom", "kind": "Topic", "slug": "predynastic-old-kingdom"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/", "id": "new-kingdom", "hide": false, "title": "Middle Kingdom and New Kingdom", "child_data": [{"kind": "Video", "id": "xabdfbde8"}, {"kind": "Video", "id": "x7fa91f0b"}, {"kind": "Article", "id": "x815306bf"}, {"kind": "Video", "id": "xa26fbccd"}, {"kind": "Article", "id": "x8ac544e8"}, {"kind": "Article", "id": "x38457cd0"}, {"kind": "Article", "id": "x99246888"}, {"kind": "Video", "id": "952857531"}, {"kind": "Exercise", "id": "x7421150f"}, {"kind": "Video", "id": "1359146969"}, {"kind": "Video", "id": "952915293"}, {"kind": "Exercise", "id": "xa372fbd2"}, {"kind": "Article", "id": "xc8c71e82"}, {"kind": "Video", "id": "xdc298bc0"}, {"kind": "Video", "id": "x9992358e"}, {"kind": "Video", "id": "x7c772e9a"}, {"kind": "Exercise", "id": "x7ad63ade"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/mortuary-temple-of-hatshepsut-and-large-kneeling-statue-new-kingdom-egypt/", "id": "pZOUV_rTyj0", "title": "Mortuary Temple of Hatshepsut and Large Kneeling Statue, New Kingdom, Egypt", "kind": "Video", "description": "Mortuary Temple and Large Kneeling Statue of Hatshepsut, c. 1479-58 B.C.E., New Kingdom, Egypt. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "mortuary-temple-of-hatshepsut-and-large-kneeling-statue-new-kingdom-egypt"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/precaution/", "id": "uLjvEsHi_qU", "title": "Hippopotamus", "kind": "Video", "description": "Met curator Isabel St\u00fcnkel on precaution in Hippopotamus dating from Egypt\u2019s Middle Kingdom,\u00a0c. 1961\u20131878 B.C.E.\n\nThis well-formed statuette of a hippopotamus (popularly called \"William\") demonstrates the Egyptian artist's appreciation for the natural world. It was molded in faience, a ceramic material made of ground quartz. Beneath the blue-green glaze, the body was painted with the outlines of river plants, symbolizing the marshes in which the animal lived.\n\nThe seemingly benign appearance that this figurine presents is deceptive. To the ancient Egyptians, the hippopotamus was one of the most dangerous animals in their world. The huge creatures were a hazard for small fishing boats and other rivercraft. The beast might also be encountered on the waterways in the journey to the afterlife. As such, the hippopotamus was a force of nature that needed to be propitiated and controlled, both in this life and the next. This example was one of a pair found in a shaft associated with the tomb chapel of the steward Senbi II at Meir, an Upper Egyptian site about thirty miles south of modern Asyut. Three of its legs have been restored because they were purposely broken to prevent the creature from harming the deceased. The hippo was part of Senbi's burial equipment, which included a canopic box (also in the Metropolitan Museum), a coffin, and numerous models of boats and food production.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit\u00a0Find an Educator Resource.", "slug": "precaution"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/ancient-thebes-unescotbs/", "id": "KV0hmkuS5ec", "title": "Ancient Thebes with its Necropolis (UNESCO/TBS)", "kind": "Video", "description": "Thebes, the city of the god Amon, was the capital of Egypt during the period of the Middle and New Kingdoms. With the temples and palaces at Karnak and Luxor, and the necropolises of the Valley of the Kings and the Valley of the Queens, Thebes is a striking testimony to Egyptian civilization at its height.", "slug": "ancient-thebes-unescotbs"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/house-altar-depicting-akhenaten-nefertiti-and-three-daughters/", "id": "ryycDVWXDvc", "title": "Akhenaten, Nefertiti, and Three Daughters", "kind": "Video", "description": "House Altar depicting Akhenaten, Nefertiti and Three of their Daughters, limestone, New Kingdom, Amarna period, 18th dynasty, c.1350 BCE (\u00c4gyptisches Museum/Neues Museum, Staatliche Museen zu Berlin)", "slug": "house-altar-depicting-akhenaten-nefertiti-and-three-daughters"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/house-altar-with-akhenaten-nefertiti-and-three-daughters-quiz/", "id": "house-altar-with-akhenaten--nefertiti--and-three-daughters-quiz", "title": "Akhenaten, Nefertiti, and Three Daughters (quiz)", "description": "Test your knowledge.", "slug": "house-altar-with-akhenaten-nefertiti-and-three-daughters-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/portrait-head-of-queen-tiye-with-a-crown-of-two-feathers/", "id": "j55j1NZoAKk", "title": "Portrait head of Queen Tiye with a crown of two feathers", "kind": "Video", "description": "A conversation between Dr. Beth Harris and Dr. Steven Zucker in front of Portrait Head of Queen Tiye with a Crown of Two Feathers, c. 1355 B.C.E., Amarna Period, Dynasty 18, New Kingdom, Egypt, yew wood, lapis lazuli, silver, gold, faience, 22.5 cm high (Egyptian Museum and Papyrus Collection at the Neues Museum, Berlin)", "slug": "portrait-head-of-queen-tiye-with-a-crown-of-two-feathers"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/thutmose-bust-of-nefertiti-c-1340-bce/", "id": "cZuYdIRAIAs", "title": "Thutmose, Bust of Nefertiti", "kind": "Video", "description": "Thutmose, Model Bust of Queen Nefertiti, c. 1340 BCE, limestone and plaster, New Kingdom, 18th dynasty, Amarna Period (Egyptian Museum and Papyrus Collection/Neues Museum, Berlin)", "slug": "thutmose-bust-of-nefertiti-c-1340-bce"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/thutmose-bust-of-nefertiti-quiz/", "id": "thutmose-bust-of-nefertiti-quiz", "title": "Thutmose Bust of Nefertiti (quiz)", "description": "Test your knowledge.", "slug": "thutmose-bust-of-nefertiti-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/fragment/", "id": "aW0blf6lWQc", "title": "Head of Tutankhamun from the Amarna Period of Egypt\u2019s New Kingdom", "kind": "Video", "description": "Met curator Nicholas Reeves on fragmented history in Head of Tutankhamun from the Amarna Period of Egypt\u2019s New Kingdom, c. 1336\u20131327 B.C.E.\n\nThis head is a fragment from a statue group that represented the god Amun seated on a throne with the young king Tutankhamun standing or kneeling in front of him. The king's figure was considerably smaller than that of the god, indicating his subordinate status in the presence of the deity. All that remains of Amun is his right hand, which touches the back of the king's crown in a gesture that signifies Tutankhamun's investiture as king. During coronation rituals, various types of crowns were put on the king's head. The type represented here\u2014probably a leather helmet with metal disks sewn onto it\u2014was generally painted blue, and is commonly called the \"blue crown.\" The ancient name was khepresh.\n\nStatue groups showing a king together with gods had been created since the Old Kingdom, and formal groups relating to the pharaoh's coronation were dedicated at Karnak by Hatshepsut and other rulers of Dynasty 18. The Metropolitan's head of Tutankhamun with the hand of Amun is special because of the intimacy with which the subject is treated. The face of the king expresses a touching youthful earnestness, and the hand of the god is raised toward his crown with gentle care.\n\nView this work on metmuseum.org.\u00a0\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit\u00a0Find an Educator Resource.", "slug": "fragment"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/judgement-in-the-presence-of-osiris-hunefer-s-book-of-the-dead/", "id": "WceVwMdN0eE", "title": "Last Judgement of Hunefer, from his tomb", "kind": "Video", "description": "Hunefer's Judgement in the presence of Osiris, Book of the Dead, 19th Dynasty, New Kingdom, c. 1275 B.C.E., papyrus, Thebes, Egypt (British Museum).", "slug": "judgement-in-the-presence-of-osiris-hunefer-s-book-of-the-dead"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/papyrus-preserved-british-museum/", "id": "q0zlBUbcWWQ", "title": "Ancient Egyptian papyrus in the Book of the Dead Exhibition", "kind": "Video", "description": "Preparing pieces of papyrus ready for display in the exhibition Journey through the afterlife: ancient Egyptian Book of the Dead. \u00a9 Trustees of the British Museum", "slug": "papyrus-preserved-british-museum"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/new-kingdom/last-judgement-of-hu-nefer-quiz/", "id": "last-judgement-of-hu-nefer-quiz", "title": "Last Judgement of Hunefer (quiz)", "description": "Test your knowledge.", "slug": "last-judgement-of-hu-nefer-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn about the ruler Akhenaten, Nefertiti, and Queen Tiye as well as some of the most extraordinary paintings from all of Egyptian culture found in the tomb-chapel of Nebamun.", "node_slug": "new-kingdom", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/egypt-art/new-kingdom", "extended_slug": "humanities/ancient-art-civilizations/egypt-art/new-kingdom", "kind": "Topic", "slug": "new-kingdom"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/ancient-art-civilizations/egypt-art/ptolemaic/", "id": "ptolemaic", "hide": false, "title": "Ptolemaic", "child_data": [{"kind": "Article", "id": "xeaf0a1ef"}, {"kind": "Article", "id": "x3d20e1ef"}, {"kind": "Article", "id": "xbb36ed1b"}, {"kind": "Video", "id": "xd1512e30"}, {"kind": "Video", "id": "xf82795ed"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/egypt-art/ptolemaic/the-mummification-process/", "id": "-MQ5dL9cQX0", "title": "The mummification process", "kind": "Video", "description": "Ancient Egyptian mummification preserved the body for the afterlife by removing internal organs and moisture and by wrapping the body with linen. This animation uses the Getty's mummy Herakleides. Love art? Follow us on Google+", "slug": "the-mummification-process"}, {"path": "khan/humanities/ancient-art-civilizations/egypt-art/ptolemaic/ancient-egyptian-coffin/", "id": "Jqgpq8vn_oU", "title": "Ancient Egyptian coffin prepared for the Book of the Dead exhibition at the British Museum", "kind": "Video", "description": "Conservators at the British Museum preparing an ancient Egyptian coffin for display in the exhibition Journey through the afterlife: ancient Egyptian Book of the Dead. \u00a9 Trustees of the British Museum.", "slug": "ancient-egyptian-coffin"}], "in_knowledge_map": false, "description": "Read the Rosetta stone, discover how mummies were prepared for the afterlife and how we care for them now.", "node_slug": "ptolemaic", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/egypt-art/ptolemaic", "extended_slug": "humanities/ancient-art-civilizations/egypt-art/ptolemaic", "kind": "Topic", "slug": "ptolemaic"}], "in_knowledge_map": false, "description": "The art of the ancient Egyptians was (for the most part) never meant to be seen by the living\u2014it was meant to benefit the dead in the afterlife.", "node_slug": "egypt-art", "render_type": "Topic", "topic_page_url": "/humanities/ancient-art-civilizations/egypt-art", "extended_slug": "humanities/ancient-art-civilizations/egypt-art", "kind": "Topic", "slug": "egypt-art"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/aegean-art1/", "id": "aegean-art1", "hide": false, "title": "Aegean art", "child_data": [{"kind": "Topic", "id": "x357214ce"}, {"kind": "Topic", "id": "x5e90fa20"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/ancient-art-civilizations/aegean-art1/cycladic/", "id": "cycladic", "hide": false, "title": "Cycladic", "child_data": [{"kind": "Video", "id": "x01aced7d"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/aegean-art1/cycladic/cycladic-harpist/", "id": "7C7do85sfXA", "title": "Harp Player, Early Cycladic period", "kind": "Video", "description": "Male harp player from Keros, c. 2600--2300 B.C.E., Early Cycladic period, marble, 22.5 cm high (National Archaeological Museum, Athens)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "cycladic-harpist"}], "in_knowledge_map": false, "description": "The art of the Cycladic Islands is best known for beautiful and enigmatic figures of varying sizes. Marbles once painted and with a strong abstract quality that attracted the attention of some of the leading artists of the 20th century.", "node_slug": "cycladic", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/aegean-art1/cycladic", "extended_slug": "humanities/ancient-art-civilizations/aegean-art1/cycladic", "kind": "Topic", "slug": "cycladic"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/aegean-art1/mycenaean/", "id": "mycenaean", "hide": false, "title": "Mycenaean", "child_data": [{"kind": "Video", "id": "x6869f68f"}, {"kind": "Video", "id": "x8a763f7d"}, {"kind": "Exercise", "id": "xdefe2f3a"}, {"kind": "Video", "id": "xb45c9226"}, {"kind": "Exercise", "id": "xbf6b2ae5"}, {"kind": "Video", "id": "xa1214f38"}, {"kind": "Exercise", "id": "x5366c04f"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/aegean-art1/mycenaean/mycenae-palace/", "id": "S7HJB0PtiW0", "title": "The \"Palace\" and Grave Circle A, Mycenae, c. 1600-1100 B.C.E.", "kind": "Video", "description": "Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "mycenae-palace"}, {"path": "khan/humanities/ancient-art-civilizations/aegean-art1/mycenaean/agamemnon-mask/", "id": "1PKOiYY9SPA", "title": "Mask of Agamemnon, Mycenae, c. 1550-1500 B.C.E.", "kind": "Video", "description": "Mask of Agamemnon, from shaft grave V, grave circle A, c.1550-1500 B.C.E., gold, 12 inches / 35 cm (National Archaeological Museum, Athens)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "agamemnon-mask"}, {"path": "khan/humanities/ancient-art-civilizations/aegean-art1/mycenaean/mask-of-agamemnon-quiz/", "id": "mask-of-agamemnon-quiz", "title": "Mask of Agamemnon (quiz)", "description": "Test your knowledge.", "slug": "mask-of-agamemnon-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/aegean-art1/mycenaean/mycenae-lion-gate/", "id": "tu5mKn3_h7Y", "title": "Lion Gate, Mycenae, c. 1300-1250 B.C.E.", "kind": "Video", "description": "limestone, relief panel 9' 6\" highSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "mycenae-lion-gate"}, {"path": "khan/humanities/ancient-art-civilizations/aegean-art1/mycenaean/lion-gate-mycenae/", "id": "lion-gate--mycenae", "title": "Lion Gate, Mycenae (quiz)", "description": "Test your knowledge on this object", "slug": "lion-gate-mycenae", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/aegean-art1/mycenaean/treasury-of-atreus/", "id": "Cc9cLmgXp_A", "title": "The Treasury of Atreus, c. 1300-1250 B.C.E., Mycenae, Greece", "kind": "Video", "description": "Speakers: Dr. Steven Zucker and Beth Harris", "slug": "treasury-of-atreus"}], "in_knowledge_map": false, "description": "The Mycenaean citadel on Mainland Greece stands high above the Aegean Sea surrounded by walls of stone so large they are called Cyclopean, as if only the mythic giant Cyclops could have moved them into place. The Bronze Age Mycenaeans were also renowned smiths, who's expertise evident in the gold masks and jewelry found in the shafts below their grave circles.", "node_slug": "mycenaean", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/aegean-art1/mycenaean", "extended_slug": "humanities/ancient-art-civilizations/aegean-art1/mycenaean", "kind": "Topic", "slug": "mycenaean"}], "in_knowledge_map": false, "description": "19th century archaeologists sought evidence for Homer's epic poems. Instead they uncovered bronze-age art of the Cyclades, the Minoans, and the Mycenaeans.", "node_slug": "aegean-art1", "render_type": "Topic", "topic_page_url": "/humanities/ancient-art-civilizations/aegean-art1", "extended_slug": "humanities/ancient-art-civilizations/aegean-art1", "kind": "Topic", "slug": "aegean-art1"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/greek-art/", "id": "greek-art", "hide": false, "title": "Greek art", "child_data": [{"kind": "Topic", "id": "x5e50256c"}, {"kind": "Topic", "id": "x342adde4"}, {"kind": "Topic", "id": "x3d495ed1"}, {"kind": "Topic", "id": "xa728cc1b"}, {"kind": "Topic", "id": "xa72ff57b"}, {"kind": "Topic", "id": "x18e1dad7"}, {"kind": "Topic", "id": "x18ff309e"}, {"kind": "Topic", "id": "x82d9181a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/ancient-art-civilizations/greek-art/beginners-guide-greece/", "id": "beginners-guide-greece", "hide": false, "title": "A beginner's guide to ancient Greece", "child_data": [{"kind": "Article", "id": "xc4d8c438"}, {"kind": "Video", "id": "x7375afe4"}, {"kind": "Article", "id": "xccace7f0"}, {"kind": "Exercise", "id": "x2ff9041d"}, {"kind": "Article", "id": "xa3431551"}, {"kind": "Article", "id": "x8c7b6c9a"}, {"kind": "Video", "id": "x2095ee2d"}, {"kind": "Video", "id": "xf2e4c942"}, {"kind": "Video", "id": "x7869e158"}, {"kind": "Video", "id": "x4d8cb1c0"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/greek-art/beginners-guide-greece/the-classical-orders/", "id": "nrRJkzXl4a4", "title": "The classical orders", "kind": "Video", "description": "A conversation with Dr. Steven Zucker & Dr. Beth Harris\n\nIn classical architecture, the Orders consist of variations of an assembly of parts made up of a column (usually with a base), a capital, and an entablature. These structural units may be repeated and combined to form the elevation of a building and its architectural vocabulary.\n\nThere are eight Orders in total: Doric (Greek and Roman versions), Tuscan, Ionic (Greek and Roman), Corinthian (Greek and Roman), and Composite. The simplest is the Tuscan, supposedly derived from the Etruscan-type temple. It has a base and capital and a plain column. The Doric is probably earlier, however, its Greek version having no base, as on the Parthenon. The Ionic Order, with its twin volute capitals, originated in Asia Minor in the mid-6th century B.C.E. The Corinthian Order was an Athenian invention of the 5th century B.C.E. and was later developed by the Romans. The Composite Order is a late Roman combination of elements from the Ionic and Corinthian Orders.\n\nThe Concise Oxford Dictionary of Art Terms, Michael Clarke, Deborah Clarke. \u00a9 2012 Oxford University Press. Available at Oxford Art OnlineAncient Greece", "slug": "the-classical-orders"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/beginners-guide-greece/diadoumenos/", "id": "Ruc8u1UyL7s", "title": "Victorious athlete: The Vaison Daidoumenos", "kind": "Video", "description": "Roman version of a Greek bronze original of about 440\u2013430 BC, found at Vaison, France.\nKnown as the Daidoumenos (ribbon wearer) this statue shows a triumphant athlete tying a ribbon round his head immediately after a victory. \u00a0Winners in the ancient Olympics were allowed to set up statues of themselves at Olympia. If they won three times they could set up specially commissioned portrait statues which could cost up to ten times the average yearly wage.\n\n\u00a9 Trustees of the British Museum", "slug": "diadoumenos"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/beginners-guide-greece/prize-amphora/", "id": "YTRctTr7MyA", "title": "Prize amphora showing a chariot race", "kind": "Video", "description": "Chariot-racing was the only Olympic sport in which women could take part, as owners of teams of horses. Kyniska, a princess of Sparta, was the first woman to win the Olympic crown in this sport.\nBritish Museum curator Judith Swaddling describes the amphora.\n\u00a9 Trustees of the British Museum", "slug": "prize-amphora"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/beginners-guide-greece/long-jump/", "id": "NeujZgfq7hA", "title": "A competitor in the long jump", "kind": "Video", "description": "The long jump was the only type of jumping contest in the ancient Olympics. It differed vitally from our long jump in that athletes used pairs of weights or halteres, swung forward on take-off and back just before landing, probably as a handicap.\n\u00a9 Trustees of the British Museum", "slug": "long-jump"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/beginners-guide-greece/sprinters/", "id": "5coSaLCWzhA", "title": "Sprinter on a vase from Rhodes and a bronze running girl", "kind": "Video", "description": "The greatest Olympic runner of all was Leonidas of Rhodes who won all three running events at each of the four successive Olympiads between 164 and 152 BC. Women competed in foot races at Olympia, but these were not part of the Olympic Games.\u00a0\u00a9 Trustees of the British Museum", "slug": "sprinters"}], "in_knowledge_map": false, "description": "Rio 2016, London 2012, Beijing 2008, Olympia 776 B.C.E. find out how the ancient pan-Hellenic games inspired our modern Olympiad. Then learn to identify the classical orders and you will never look at your city or town the same way.", "node_slug": "beginners-guide-greece", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/greek-art/beginners-guide-greece", "extended_slug": "humanities/ancient-art-civilizations/greek-art/beginners-guide-greece", "kind": "Topic", "slug": "beginners-guide-greece"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/", "id": "greek-pottery", "hide": false, "title": "Pottery", "child_data": [{"kind": "Video", "id": "xa709b028"}, {"kind": "Article", "id": "xfc56ffea"}, {"kind": "Video", "id": "xadf884ee"}, {"kind": "Exercise", "id": "x8414848f"}, {"kind": "Video", "id": "1064692619"}, {"kind": "Exercise", "id": "xa03b78c2"}, {"kind": "Video", "id": "1397435864"}, {"kind": "Article", "id": "xab328f25"}, {"kind": "Video", "id": "x071426f8"}, {"kind": "Exercise", "id": "x58446d60"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/ancient-greek-vase-black-figure-technique/", "id": "FpLPx_Akl7Y", "title": "Ancient Greek vase production and the black-figure technique", "kind": "Video", "description": "Used for the storage and shipment of grains, wine, and other goods, as well as in the all-male Greek drinking party, known as the symposium, ancient Greek vases were decorated with a variety of subjects ranging from scenes of everyday life to the tales of heroes and gods. The two most popular techniques of vase decoration were the black-figure technique, so-named because the figures were painted black, and the red-figure technique, in which the figures were left the red color of the clay. The black-figure technique developed around 700 B.C. and remained the most popular Greek pottery style until about 530 B.C., when the red-figure technique was developed, eventually surpassing it in popularity. This video illustrates the techniques used in the making and decorating of a black-figure amphora (storage jar) in the Art Institute of Chicago's collection.\nThis video was produced with the generous support of a Long Range Fund grant provided by the Community Associates of the Art Institute of Chicago. It was created for LaunchPad, a program of digital interpretive materials that supplement the viewing of works of art on display in the Art Institute of Chicago's galleries.", "slug": "ancient-greek-vase-black-figure-technique"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/dipylon-vase/", "id": "Uwpdiq9mYME", "title": "Geometric: Dipylon Amphora", "kind": "Video", "description": "Dipylon Amphora, c. 755-750 B.C.E., ceramic, 160 cm (National Archaeological Museum, Athens)\u00a0Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "dipylon-vase"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/dipylon-amphora-quiz/", "id": "dipylon-amphora-quiz", "title": "Dipylon Amphora (quiz)", "description": "Test your knowledge.", "slug": "dipylon-amphora-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/exekias-attic-black-figure-amphora-with-ajax-and-achilles-playing-a-game/", "id": "k2fdtepbkz8", "title": "Attic Black-Figure: Exekias, amphora with Ajax and Achilles playing a game", "kind": "Video", "description": "A conversation between Dr. Beth Harris and Dr. Steven Zucker in front of an Attic black figure amphora by Exekias (potter and painter), archaic period, c. 540-530 B.C.E., 61.1 cm high, found Vulci (Gregorian Etruscan Museum, Vatican)", "slug": "exekias-attic-black-figure-amphora-with-ajax-and-achilles-playing-a-game"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/exekias-amphora-with-ajax-and-achilles-playing-a-game-quiz/", "id": "exekias--amphora-with-ajax-and-achilles-playing-a-game-quiz", "title": "Exekias, Amphora with Ajax and Achilles Playing a Game (quiz)", "description": "Test your knowledge.", "slug": "exekias-amphora-with-ajax-and-achilles-playing-a-game-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/exekias-dionysos-kylix/", "id": "tTF5ZY6aitg", "title": "Attic Black-Figure: Exekias, Dionysos Kylix", "kind": "Video", "description": "Exekias, Dionysos Kylix, c. 530 B.C.E. (Antikensammlungen, Munich)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "exekias-dionysos-kylix"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/niobid-krater/", "id": "S3TlDyT2lyg", "title": "Attic Red-Figure: Niobid Painter, \"Niobid Krater\"", "kind": "Video", "description": "Niobid Painter, \"Niobid Krater,\" Attic red-figure calyx-krater, c. 460-50 B.C.E., 54 x 56 cm\u00a0(Mus\u00e9e du Louvre)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "niobid-krater"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/greek-pottery/niobid-krater-quiz/", "id": "niobid-krater-quiz", "title": "Niobid Krater (quiz)", "description": "Test your knowledge.", "slug": "niobid-krater-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Almost no ancient Greek wall painting survives, fortunately, their magnificent painted vases can tell us a great deal about lost wall painting as well as Greek culture and technology. This tutorial traces Greek pottery from the Geometric through to the Attic red figure style.", "node_slug": "greek-pottery", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/greek-art/greek-pottery", "extended_slug": "humanities/ancient-art-civilizations/greek-art/greek-pottery", "kind": "Topic", "slug": "greek-pottery"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/", "id": "daedalic-archaic", "hide": false, "title": "Daedalic and Archaic", "child_data": [{"kind": "Video", "id": "xd8239fd7"}, {"kind": "Video", "id": "671260982"}, {"kind": "Exercise", "id": "xe9c79e1a"}, {"kind": "Video", "id": "x5b7b2bbe"}, {"kind": "Video", "id": "x27e4a84a"}, {"kind": "Exercise", "id": "x53011126"}, {"kind": "Video", "id": "x3ab0b12d"}, {"kind": "Exercise", "id": "xa8b80256"}, {"kind": "Video", "id": "1064657947"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/lady-auxerre/", "id": "9s9pkVZD-Iw", "title": "Lady of Auxerre", "kind": "Video", "description": "Statue of a woman, known as the \"Lady of Auxerre,\" Eleutherna, Crete(?), Greece, c. 650-625 B.C.E., Daedalic style, limestone, 75 cm high (Mus\u00e9e du Louvre)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "lady-auxerre"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/kouros-youth-archaic-greek-c-590-580-b-c-e/", "id": "Ax8vcxRtmHY", "title": "New York Kouros", "kind": "Video", "description": "Marble Statue of a Kouros (New York Kouros), c. 590\u2013580 B.C.E. (Attic, archaic), Naxian marble, 194.6 x 51.6 cm (The Metropolitan Museum of Art)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "kouros-youth-archaic-greek-c-590-580-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/new-york-kouros-quiz/", "id": "new-york-kouros-quiz", "title": "New York Kouros (quiz)", "description": "Test your knowledge.", "slug": "new-york-kouros-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/naked-authority/", "id": "ZbZ-t1FmnKY", "title": "Marble Statue of a kouros (youth)", "kind": "Video", "description": "Met curator Joan R. Mertens on self-reliance in Marble Statue of a kouros (youth),\u00a0c. 590\u2013580 B.C.E.\u00a0from the Attic culture\u00a0of ancient Greece.\n\nThis kouros is one of the earliest marble statues of a human figure carved in Attica. The rigid stance, with the left leg forward and arms at the side, was derived from Egyptian art. The pose provided a clear, simple formula that was used by Greek sculptors throughout the sixth century B.C.E. In this early figure, geometric, almost abstract forms predominate, and anatomical details are rendered in beautiful analogous patterns. The statue marked the grave of a young Athenian aristocrat.\n\nView this work on\u00a0metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "naked-authority"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/anavysos-kouros/", "id": "v1_pCZBVWuY", "title": "Anavysos Kouros", "kind": "Video", "description": "Anavysos Kouros, c. 530 B.C.E., marble, 6' 4\" (National Archaeological Museum, Athens)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "anavysos-kouros"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/arachaic-anavysos-kouros-quiz/", "id": "arachaic--anavysos-kouros-quiz", "title": "Anavysos Kouros (quiz)", "description": "Test your knowledge.", "slug": "arachaic-anavysos-kouros-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/peplos-kore/", "id": "RjpT4Apgda8", "title": "Peplos Kore from the Acropolis", "kind": "Video", "description": "Peplos Kore, c. 530 B.C.E., from the Acropolis, Athens, Greece (Acropolis Museum, Athens)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "peplos-kore"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/peplos-kore-quiz/", "id": "peplos-kore-quiz", "title": "Peplos Kore (quiz)", "description": "Test your knowledge.", "slug": "peplos-kore-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/daedalic-archaic/ancient-greek-temples-at-paestum/", "id": "_tNnI_w6TTQ", "title": "Ancient Greek temples at Paestum, Italy", "kind": "Video", "description": "Ancient Greek Temples at Paestum: Hera I, c. 560-530 B.C.E., Archaic Period; Hera II, c. 460 B.C.E., Classical Period; Temple of Minerva, c. 500 B.C.E. Archaic Period. A conversation with Dr. Beth Harris and Dr. Steven Zucker", "slug": "ancient-greek-temples-at-paestum"}], "in_knowledge_map": false, "description": "This tutorial traces the representation of the human body in monumental Greek sculpture from the earliest Egyptian influence to the increasing naturalism that lays the foundation for the Classical style.", "node_slug": "daedalic-archaic", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/greek-art/daedalic-archaic", "extended_slug": "humanities/ancient-art-civilizations/greek-art/daedalic-archaic", "kind": "Topic", "slug": "daedalic-archaic"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/greek-art/early-classical/", "id": "early-classical", "hide": false, "title": "Early classical", "child_data": [{"kind": "Video", "id": "xc279f188"}, {"kind": "Exercise", "id": "xf23efa4a"}, {"kind": "Video", "id": "xc4183883"}, {"kind": "Video", "id": "xecb32edd"}, {"kind": "Article", "id": "x7785af3f"}, {"kind": "Video", "id": "1159533851"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/greek-art/early-classical/kritios-boy/", "id": "Q5IWDhXtsmE", "title": "Kritios Boy", "kind": "Video", "description": "Kritios Boy, from the Acropolis, Athens, c. 480 B.C.E., 3' 10\" high (Acropolis Museum, Athens),\u00a0Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "kritios-boy"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/early-classical/kritios-boy-quiz/", "id": "kritios-boy-quiz", "title": "Kritios Boy Quiz", "description": "Test your knowledge about this object.", "slug": "kritios-boy-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/early-classical/charioteer-delphi/", "id": "A-Q79HlORtM", "title": "Charioteer of Delphi", "kind": "Video", "description": "Charioteer of Delphi, c. 478-474 B.C.E., bronze (lost wax cast) with silver, glass and copper inlay, 1.8 m high (Delphi Archaeological Museum)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nInscription on base:\n\"Dedicated by Polyzalus, younger brother of Gelon, tyrant of Gela and later of Syracuse, and of Hieron\"\n\nUncovered in 1896 near the Temple of Apollo at Delphi", "slug": "charioteer-delphi"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/early-classical/artemision-zeus/", "id": "zqb4Zvb5PNA", "title": "Artemision Zeus or Poseidon", "kind": "Video", "description": "Artemision Zeus or Poseidon, c. 460 B.C.E., bronze, 2.09 m high, Early Classical (Severe Style), recovered from a shipwreck off Cape Artemision, Greece in 1928 (National Archaeological Museum, Athens)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "artemision-zeus"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/early-classical/east-and-west-pediments-from-the-temple-of-aphaia-aegina-c-490-480-b-c-e/", "id": "pdqOIg_QYSc", "title": "East and West Pediments, Temple of Aphaia, Aegina", "kind": "Video", "description": "East and West Pediments from the Temple of Aphaia, Aegina, Archaic/Early Classical Periods, c. 490-480 B.C.E. (Glyptothek, Munich)\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "east-and-west-pediments-from-the-temple-of-aphaia-aegina-c-490-480-b-c-e"}], "in_knowledge_map": false, "description": "The Early Classical style describes the trends in Greek sculpture between c. 490 and 450 B.C.E. Artistically this stylistic phase represents a transition from the rather austere and static Archaic style of the sixth century B.C.E. to the more idealized Classical style.", "node_slug": "early-classical", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/greek-art/early-classical", "extended_slug": "humanities/ancient-art-civilizations/greek-art/early-classical", "kind": "Topic", "slug": "early-classical"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/greek-art/classical/", "id": "classical", "hide": false, "title": "Classical", "child_data": [{"kind": "Video", "id": "988889228"}, {"kind": "Article", "id": "x3beb371c"}, {"kind": "Exercise", "id": "x789ea490"}, {"kind": "Video", "id": "1168512577"}, {"kind": "Video", "id": "xa917e560"}, {"kind": "Video", "id": "x6d14ffc4"}, {"kind": "Video", "id": "671422819"}, {"kind": "Video", "id": "671563199"}, {"kind": "Video", "id": "xfb1c4b07"}, {"kind": "Video", "id": "669432577"}, {"kind": "Video", "id": "x45e93247"}, {"kind": "Exercise", "id": "x1472345f"}, {"kind": "Video", "id": "x6e2e7625"}, {"kind": "Video", "id": "671422822"}, {"kind": "Video", "id": "x6f8830f4"}, {"kind": "Exercise", "id": "x58887abb"}, {"kind": "Video", "id": "x048af0e0"}, {"kind": "Exercise", "id": "x6a9e2b19"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/polykleitos-doryphoros-spear-bearer/", "id": "EAR9RAMg9NY", "title": "Polykleitos, Doryphoros (Spear Bearer)", "kind": "Video", "description": "Polykleitos, Doryphoros (Spear-Bearer), Early Classical Period, Roman marble copy after a Greek bronze original from c. 450-440 B.C.E. (Museo Archaeologico Nazionale, Naples). Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "polykleitos-doryphoros-spear-bearer"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/doryphoros-quiz/", "id": "doryphoros-quiz", "title": "Polykleitos, Doryphoros (quiz)", "description": "Test your knowledge.", "slug": "doryphoros-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/myron-discobolus-discus-thrower-roman-copy-of-an-ancient-greek-bronze-from-c-450-b-c-e/", "id": "OhJKDqZgNXg", "title": "Myron, Discobolus (Discus Thrower), Roman copy of an ancient Greek bronze", "kind": "Video", "description": "Myron, Discobolus (Discus Thrower), Roman copy of an ancient Greek bronze from c. 450 B.C.E., Classical Period (Palazzo Massimo alle Terme). \n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "myron-discobolus-discus-thrower-roman-copy-of-an-ancient-greek-bronze-from-c-450-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/athenian-agora/", "id": "TYXCcTchLnI", "title": "The Athenian Agora and the experiment in democracy", "kind": "Video", "description": "Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "athenian-agora"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/parthenon/", "id": "tWDflkBZC6U", "title": "Parthenon (Acropolis)", "kind": "Video", "description": "Iktinos and Kallikrates (Phidias directed the sculptural program), Parthenon, Athens, 447 - 432 B.C.E.\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "parthenon"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/phidias-sculpture-from-the-east-pediment-of-the-parthenon-c-448-432-b-c-e/", "id": "Ip6hmC2KIug", "title": "East Pediment sculptures, Parthenon, including Helios, Horses and Dionysus (Heracles?)", "kind": "Video", "description": "Phidias (?), Sculpture from the East Pediment of the Parthenon, marble, c. 448-432 B.C.E., Classical Period (British Museum, London). Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "phidias-sculpture-from-the-east-pediment-of-the-parthenon-c-448-432-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/phidias-parthenon-frieze-c-438-32-b-c-e/", "id": "KzZF1lP4Rbk", "title": "Parthenon frieze", "kind": "Video", "description": "Phidias(?), Parthenon Frieze, c. 438-32 B.C.E., pentelic marble, Classical Period (420 linear feet of the 525 that complete the frieze are in the British Museum). \n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "phidias-parthenon-frieze-c-438-32-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/parthenon-ergastines/", "id": "zU9qSQi1E68", "title": "\"Plaque of the Ergastines\" fragment from the frieze on the east side of the Parthenon", "kind": "Video", "description": "Phidias (?), \"Plaque of the Ergastines,\" 445 - 438 B.C.E., Pentelic marble (Attica), 0.96 x 2.07 m, fragment from the frieze on the east side of the Parthenon (Mus\u00e9e du Louvre, Paris)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "parthenon-ergastines"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/battle-of-the-lapiths-and-centaurs-parthenon-metope-c-440-b-c-e/", "id": "XXl5h257iBA", "title": "Parthenon Metopes", "kind": "Video", "description": "Battle of the Lapiths and Centaurs, Parthenon Metopes,\nsouth flank, marble, c. 440 B.C.E., Classical Period (British Museum, London). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "battle-of-the-lapiths-and-centaurs-parthenon-metope-c-440-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/egyptian-blue-parthenon/", "id": "uwDHi2KNM4s", "title": "Egyptian blue on the Parthenon sculptures", "kind": "Video", "description": "A new technique unveils ancient colour at the British Museum. \u00a9 Trustees of the British Museum.", "slug": "egyptian-blue-parthenon"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/parthenon-quiz/", "id": "parthenon-quiz", "title": "Parthenon (quiz)", "description": "Test your knowledge.", "slug": "parthenon-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/erechtheion/", "id": "3ebYvMC12HI", "title": "The Erechtheion", "kind": "Video", "description": "The Erechtheion, 421-405 B.C.E. (Classical Greek), Acropolis, Athens\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "erechtheion"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/caryatid-ionic-column-erechtheion-421-407-b-c-e/", "id": "X872rmThCF8", "title": "Caryatid and column from the Erechtheion", "kind": "Video", "description": "Caryatid (South Porch) and Ionic Column (North Porch), Erechtheion on the Acropolis, Athens, marble, 421-407 B.C.E., Classical Period (British Museum, London); Mnesicles may have been the architect. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "caryatid-ionic-column-erechtheion-421-407-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/sandal-nike/", "id": "B4HXrb8cPQI", "title": "Victory (Nike) Adjusting Her Sandal, Temple of Athena Nike (Acropolis)", "kind": "Video", "description": "Nike Adjusting Her Sandal, from the south side of the parapet of the Temple of Athena Nike, Acropolis, Athens, Greece, c. 410 B.C.E., marble, 3' 6\" high (Acropolis Museum, Athens)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "sandal-nike"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/victory-nike-adjusting-her-sandal-quiz/", "id": "victory--nike--adjusting-her-sandal-quiz", "title": "Victory (Nike) Adjusting her Sandal (quiz)", "description": "Test your knowledge.", "slug": "victory-nike-adjusting-her-sandal-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/hegeso-stele/", "id": "YUzsxLi43gE", "title": "Grave Stele of Hegeso", "kind": "Video", "description": "Grave stele of Hegeso, c. 410 B.C.E., marble and paint, from the Dipylon Cemetary, Athens, 5' 2\" (National Archaeological Museum, Athens)\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "hegeso-stele"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/classical/grave-stele-of-hegeso/", "id": "grave-stele-of-hegeso", "title": "Grave Stele of Hegeso (quiz)", "description": "Test your knowledge.", "slug": "grave-stele-of-hegeso", "kind": "Exercise"}], "in_knowledge_map": false, "description": "By around 500 B.C.E. \u2018rule by the people,\u2019 or democracy, had emerged in the city of Athens. Following the defeat of a Persian invasion in 480-479 B.C.E., mainland Greece and Athens in particular entered into a golden age. In drama and philosophy, literature, art and architecture Athens was second to none. The city\u2019s empire stretched from the western Mediterranean to the Black Sea, creating enormous wealth. This paid for one of the biggest public building projects ever seen in Greece, which included the Parthenon.", "node_slug": "classical", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/greek-art/classical", "extended_slug": "humanities/ancient-art-civilizations/greek-art/classical", "kind": "Topic", "slug": "classical"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/ancient-art-civilizations/greek-art/late-classical/", "id": "late-classical", "hide": false, "title": "Late classical (4th century)", "child_data": [{"kind": "Video", "id": "1385508282"}, {"kind": "Video", "id": "x9a648f06"}, {"kind": "Video", "id": "xd2fb31ae"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/greek-art/late-classical/lysippos-farnese-hercules/", "id": "T-Yv4mp5yp8", "title": "Lysippos, Farnese Hercules", "kind": "Video", "description": "Lysippos, Farnese Hercules, 4th century B.C.E. (later Roman copy by Glycon)(Archaeological Museum, Naples). Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "lysippos-farnese-hercules"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/late-classical/lysippos-apoxyomenos-scraper-c-330-b-c-e-roman-copy/", "id": "REeBUSYRzRo", "title": "Lysippos, Apoxyomenos (Scraper)", "kind": "Video", "description": "Lysippos,\u00a0Apoxyomenos (Scraper, Roman copy after a bronze statue from c. 330 B.C.E., 6' 9\" high (Vatican Museums).", "slug": "lysippos-apoxyomenos-scraper-c-330-b-c-e-roman-copy"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/late-classical/alexander-sarcophagus/", "id": "kxiaae0HIBs", "title": "Alexander Sarcophagus", "kind": "Video", "description": "The Alexander Sarcophagus,\u00a0c. 312 B.C.E., Pentelic marble and polychromy, found in Sidon, 195 x 318 x 167 cm (\u0130stanbul Archaeological Museums).\u00a0Speakers: Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker", "slug": "alexander-sarcophagus"}], "in_knowledge_map": false, "description": "The late Classical style during the early 4th century was a time of experimentation and transition away from the strict canonical ideals of the high Classical moment.", "node_slug": "late-classical", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/greek-art/late-classical", "extended_slug": "humanities/ancient-art-civilizations/greek-art/late-classical", "kind": "Topic", "slug": "late-classical"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/", "id": "hellenistic", "hide": false, "title": "Hellenistic", "child_data": [{"kind": "Video", "id": "1159755289"}, {"kind": "Video", "id": "671711102"}, {"kind": "Exercise", "id": "xa68ad356"}, {"kind": "Video", "id": "x53081eaa"}, {"kind": "Video", "id": "671563200"}, {"kind": "Exercise", "id": "x71b688cd"}, {"kind": "Video", "id": "719474979"}, {"kind": "Exercise", "id": "x538dd8e2"}, {"kind": "Video", "id": "988721865"}, {"kind": "Exercise", "id": "xf4499ca3"}, {"kind": "Video", "id": "1165113617"}, {"kind": "Exercise", "id": "x15cc7e13"}, {"kind": "Video", "id": "1359574073"}, {"kind": "Exercise", "id": "x2dbfdfb4"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/barberini-faun-c-220-b-c-e/", "id": "KQ63wu7lsXo", "title": "Barberini Faun", "kind": "Video", "description": "Barberini Faun, c. 220 B.C.E., Hellenistic Period (Glyptothek, Munich). Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "barberini-faun-c-220-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/dying-gaul-c-220-b-c-e/", "id": "3M4pu6YtzJU", "title": "Dying Gaul", "kind": "Video", "description": "Dying Gaul, ancient Roman marble copy of a lost bronze Greek sculpture, c. 220 B.C.E., Hellenistic Period (Capitoline Museum). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "dying-gaul-c-220-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/hellenistic-dying-gaul-quiz/", "id": "hellenistic--dying-gaul-quiz", "title": "Dying Gaul (quiz)", "description": "Test your knowledge.", "slug": "hellenistic-dying-gaul-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/enamored/", "id": "_rdhFaROsVA", "title": "Bronze statue of Eros sleeping", "kind": "Video", "description": "Met curator Se\u00e1n Hemingway on the purity of love in Bronze statue of Eros sleeping from Greece\u2019s Hellenistic Period, 3rd\u20132nd century B.C.E.\n\nThe Hellenistic period introduced the accurate characterization of age. Young children enjoyed great favor, whether in mythological form, as baby Herakles or Eros, or in genre scenes, playing with each other or with pets. This Eros, god of love, has been brought down to earth and disarmed, a conception considerably different from that of the powerful, often cruel, and capricious being so often addressed in Archaic poetry. One of the few bronze statues to have survived from antiquity, this figure of a plump baby in relaxed pose conveys a sense of the immediacy and naturalistic detail that the medium of bronze made possible. He is clearly based on firsthand observation. The support on which the god rests is a modern addition, but the work originally would have had a separate base, most likely of stone.\u00a0\n\nThis statue is the finest example of its kind. Judging from the large number of extant replicas, the type was popular in Hellenistic and, especially, Roman times. In the Roman period, Sleeping Eros statues decorated villa gardens and fountains. Their function in the Hellenistic period is less clear. They may have been used as dedications within a sanctuary of Aphrodite or possibly may have been erected in a public park or private, even royal, garden.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "enamored"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/nike-winged-victory-of-samothrace-c-190-b-c-e/", "id": "TPM1LuW3Y5w", "title": "Winged Victory (Nike) of Samothrace", "kind": "Video", "description": "Nike (Winged Victory) of Samothrace, Lartos marble (ship) and Parian marble (figure), c. 190 B.C.E. 3.28m high, Hellenistic Period (Mus\u00e9e du Louvre, Paris). The sculpture was unearthed in 1863 after its discovery under the direction of Charles Champoiseau\u200b, the French Vice-Consul to Turkey. Please note that the theoretical reconstruction of the Nike as a trumpeter mentioned in the video has been largely abandoned; the monument is now thought to have been part of a fountain possibly commemorating a naval victory. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "nike-winged-victory-of-samothrace-c-190-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/the-pergamon-altar-c-200-150-b-c-e/", "id": "L3SIooVHV8E", "title": "Great Altar of Zeus and Athena at Pergamon", "kind": "Video", "description": "The Pergamon Altar, c. 200-150 B.C.E., 35.64 x 33.4 meters, Hellenistic Period (Pergamon Museum, Berlin). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "the-pergamon-altar-c-200-150-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/altar-at-pergamon-quiz/", "id": "altar-at-pergamon-quiz", "title": "Altar at Pergamon (quiz)", "description": "Test your knowledge.", "slug": "altar-at-pergamon-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/apollonius-boxer-at-rest-c-100-b-c-e/", "id": "FvsSPJoJB3k", "title": "Apollonius, Seated Boxer", "kind": "Video", "description": "Apollonius, Boxer at Rest, c. 100 B.C.E., bronze, Hellenistic Period (Palazzo Massimo, Museo Nazionale Romano, Rome). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "apollonius-boxer-at-rest-c-100-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/seated-boxer-quiz/", "id": "seated-boxer-quiz", "title": "Seated Boxer (quiz)", "description": "Test your knowledge.", "slug": "seated-boxer-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/alexander-mosaic-c-100-b-c-e/", "id": "51UA1T89MzU", "title": "Alexander Mosaic from the House of the Faun, Pompeii", "kind": "Video", "description": "Alexander Mosaic, c. 100 B.C.E., Roman copy (Pompeii) of a lost Greek painting, c. 315 B.C.E., Hellenistic Period (Archaeological Museum, Naples). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "alexander-mosaic-c-100-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/alexander-mosaic-quiz/", "id": "alexander-mosaic-quiz", "title": "Alexander Mosaic (quiz)", "description": "Test your knowledge.", "slug": "alexander-mosaic-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/laoco-n-and-his-sons-early-first-century-c-e/", "id": "C3cwGCezgSQ", "title": "Laoco\u00f6n and his sons", "kind": "Video", "description": "Athanadoros, Hagesandros, and Polydoros of Rhodes, Laoco\u00f6n and his Sons, early first century C.E., marble, 7'10 1/2\" high (Vatican Museums)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "laoco-n-and-his-sons-early-first-century-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/greek-art/hellenistic/-laoco-n-quiz/", "id": "-laoco-n-quiz", "title": "Laoco\u00f6n (quiz)", "description": "Test your knowledge.", "slug": "-laoco-n-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Alexander the Great died in 323 B.C.E. leaving a vast empire to his generals, the Diadochi (successors). The Diadochi divided Alexander's empire amongst themselves\u2014the Hellenistic dynasties of the Seleucids in the Near East, the Ptolemies in Egypt, the Antigonids in Macedonia, and the wealthy Attalid kings of Pergamon who ruled most of western Asia Minor. Greek culture flourished across an enormous area, but at the same time, these \"Hellenized\" peoples infused Greek art with a drama and breadth beyond anything the Greeks had previously produced.", "node_slug": "hellenistic", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/greek-art/hellenistic", "extended_slug": "humanities/ancient-art-civilizations/greek-art/hellenistic", "kind": "Topic", "slug": "hellenistic"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/ancient-art-civilizations/greek-art/greek-art-quiz/", "id": "greek-art-quiz", "hide": false, "title": "Greek art (quiz)", "child_data": [{"kind": "Exercise", "id": "x484b1754"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/greek-art/greek-art-quiz/ancient-greece/", "id": "ancient-greece", "title": "Ancient Greece (quiz)", "description": "Test your knowledge.", "slug": "ancient-greece", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "greek-art-quiz", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/greek-art/greek-art-quiz", "extended_slug": "humanities/ancient-art-civilizations/greek-art/greek-art-quiz", "kind": "Topic", "slug": "greek-art-quiz"}], "in_knowledge_map": false, "description": "Ancient Greek art was collected in ancient Rome, studied during the Renaissance and formalized in the 19th century. It is the most influential art ever made.", "node_slug": "greek-art", "render_type": "Topic", "topic_page_url": "/humanities/ancient-art-civilizations/greek-art", "extended_slug": "humanities/ancient-art-civilizations/greek-art", "kind": "Topic", "slug": "greek-art"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/ancient-art-civilizations/nabataean/", "id": "nabataean", "hide": false, "title": "Nabataean", "child_data": [{"kind": "Article", "id": "x631908ca"}, {"kind": "Article", "id": "xd416c031"}, {"kind": "Article", "id": "x7294f55b"}, {"kind": "Video", "id": "x0e0923d6"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/nabataean/unesco-siq-project/", "id": "WZgYhVgWR8g", "title": "Petra: UNESCO Siq Project", "kind": "Video", "description": "The Siq is one of Petra\u2019s most endangered areas, in which natural environmental risks pose a major threat to the cultural heritage and the visitors. Thus, systematic identification and monitoring of its potentially unstable areas is needed. The Jordanian government made a request in 2011 for assistance in this regard, and subsequently a rapid assessment of the Siq was carried out by UNESCO to identify the unstable blocks and map risk zones in the Siq. Read more here.", "slug": "unesco-siq-project"}], "in_knowledge_map": false, "description": "The Siq is a canyon leading to Petra, the greatest city of the Nabataeans, a people who occupied the area from Sinai to northern Arabia and southern Syria.", "node_slug": "nabataean", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/nabataean", "extended_slug": "humanities/ancient-art-civilizations/nabataean", "kind": "Topic", "slug": "nabataean"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/etruscan/", "id": "etruscan", "hide": false, "title": "Etruscan", "child_data": [{"kind": "Article", "id": "x77d56b38"}, {"kind": "Article", "id": "xd4c7ec58"}, {"kind": "Article", "id": "x9b381c3a"}, {"kind": "Video", "id": "xd9ea6e7a"}, {"kind": "Video", "id": "x27119979"}, {"kind": "Article", "id": "xd15f581f"}, {"kind": "Article", "id": "x4093b128"}, {"kind": "Article", "id": "x0474f941"}, {"kind": "Article", "id": "xd5716aa3"}, {"kind": "Article", "id": "xa49c4857"}, {"kind": "Article", "id": "xda8415e7"}, {"kind": "Article", "id": "x2cfe3767"}, {"kind": "Video", "id": "x45a302b4"}, {"kind": "Exercise", "id": "x667c0450"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/etruscan/apollo-of-veil/", "id": "GLgrt_4WnMY", "title": "Apulu (Apollo of Veil)", "kind": "Video", "description": "Apulu (Apollo of Veil), from the roof of the Portonaccio temple, Italy, c. 510-500 B.C.E., painted terracotta, 5 feet, 11 inches high (Museo Nazionale di Villa Giulia, Rome). \u00a0Speakers: Dr Steven Zucker and Dr. Beth Harris", "slug": "apollo-of-veil"}, {"path": "khan/humanities/ancient-art-civilizations/etruscan/sarcophagus-of-the-spouses-rome/", "id": "XmirNCA_Lj4", "title": "Sarcophagus of the Spouses (Rome)", "kind": "Video", "description": "Sarcophagus of the Spouses (or Sarcophagus with Reclining Couple), from the Banditaccia necropolis, Cerveteri, Italy, c. 520 B.C.E., painted terracotta, 3 feet 9 1/2 inches x 6 feet 7 inches (Museo Nazionale di Villa Giulia, Rome). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "sarcophagus-of-the-spouses-rome"}, {"path": "khan/humanities/ancient-art-civilizations/etruscan/etruscan-necropolises-unesconhk/", "id": "YheIckLuV7c", "title": "Etruscan Necropolises of Cerveteri and Tarquinia (from UNESCO/NHK)", "kind": "Video", "description": "These two large Etruscan cemeteries reflect different types of burial practices from the 9th to the 1st century BC, and bear witness to the achievements of Etruscan culture. Which over nine centuries developed the earliest urban civilization in the northern Mediterranean. Some of the tombs are monumental, cut in rock and topped by impressive tumuli (burial mounds). Many feature carvings on their walls, others have wall paintings of\u00a0outstanding quality. The necropolis near Cerveteri, known as Banditaccia, contains thousands of tombs organized in a city-like plan, with streets, small squares and neighbourhoods. The site contains very different types of tombs: trenches cut in rock; tumuli; and some, also carved in rock, in the shape of huts or houses with a wealth of structural details. These provide the only surviving evidence of Etruscan residential architecture. The necropolis of Tarquinia, also known as Monterozzi, contains 6,000 graves cut in the rock. It is famous for its 200 painted tombs, the earliest of which date from the 7th century BC.\nSource: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai (URL)", "slug": "etruscan-necropolises-unesconhk"}, {"path": "khan/humanities/ancient-art-civilizations/etruscan/etruscan-art/", "id": "etruscan-art", "title": "Etruscan art (quiz)", "description": "Test your knowledge!", "slug": "etruscan-art", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Before Rome, the Etruscan civilization ruled much what is now Italy. The Etruscans left fine metalwork, elaborate tombs and a deep mark on ancient Roman culture.", "node_slug": "etruscan", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/etruscan", "extended_slug": "humanities/ancient-art-civilizations/etruscan", "kind": "Topic", "slug": "etruscan"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/roman/", "id": "roman", "hide": false, "title": "Roman", "child_data": [{"kind": "Topic", "id": "x6c8c2cdb"}, {"kind": "Topic", "id": "x25dda5cc"}, {"kind": "Topic", "id": "x846670b8"}, {"kind": "Topic", "id": "x12980ca5"}, {"kind": "Topic", "id": "xcf324c83"}, {"kind": "Topic", "id": "x3c70feb6"}, {"kind": "Topic", "id": "x42d3864b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/ancient-art-civilizations/roman/beginners-guide-rome/", "id": "beginners-guide-rome", "hide": false, "title": "A beginner's guide to ancient Rome", "child_data": [{"kind": "Video", "id": "785318223"}, {"kind": "Article", "id": "x213df5e6"}, {"kind": "Article", "id": "x0a058384"}, {"kind": "Article", "id": "x8282f2bb"}, {"kind": "Article", "id": "x3023f1e6"}, {"kind": "Article", "id": "xbc5ee710"}, {"kind": "Article", "id": "x221ed686"}, {"kind": "Video", "id": "1159741561"}, {"kind": "Article", "id": "x2784dcd4"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/roman/beginners-guide-rome/a-tour-through-ancient-rome-in-320-c-e/", "id": "e_phjB19ZEg", "title": "Ancient Rome", "kind": "Video", "description": "A project between Khan Academy and Rome Reborn - with Dr. Bernard Frischer", "slug": "a-tour-through-ancient-rome-in-320-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/roman/beginners-guide-rome/digging-through-time/", "id": "Z1RpVPbHgzU", "title": "Digging through time", "kind": "Video", "description": "A conversation with Dr. Darius Arya and Dr. Beth Harris.", "slug": "digging-through-time"}], "in_knowledge_map": false, "description": "Roman art spans almost 1,000 years and three continents. The first Roman art can be dated back to 509 B.C.E., with the legendary founding of the Roman Republic, and lasted until 330 C.E. (or much longer, if you include Byzantine art). The city of Rome was a melting pot, and the Romans had no qualms about adapting artistic influences from the other Mediterranean cultures that surrounded and preceded them.", "node_slug": "beginners-guide-rome", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/roman/beginners-guide-rome", "extended_slug": "humanities/ancient-art-civilizations/roman/beginners-guide-rome", "kind": "Topic", "slug": "beginners-guide-rome"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/ancient-art-civilizations/roman/wall-painting/", "id": "wall-painting", "hide": false, "title": "Wall painting", "child_data": [{"kind": "Article", "id": "x2a1c2429"}, {"kind": "Video", "id": "952728914"}, {"kind": "Article", "id": "x57c677d8"}, {"kind": "Video", "id": "1159741559"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/roman/wall-painting/painted-garden-villa-of-livia/", "id": "PPyqEsyVmIQ", "title": "Empire: Painted Garden, Villa of Livia", "kind": "Video", "description": "Painted Garden, Villa of Livia, fresco, 30-20 B.C.E. (Museo Nazionale Romano, Palazzo Massimo, Rome) Plant species include: umbrella pine, oak, red fir, quince, pomegranate, myrtle, oleander, date palm, strawberry, laurel, viburnum, holm oak, boxwood, cypress, ivy, acanthus, rose, poppy, chrysanthemum, chamomile, fern, violet, and iris.", "slug": "painted-garden-villa-of-livia"}, {"path": "khan/humanities/ancient-art-civilizations/roman/wall-painting/villa-of-mysteries/", "id": "SEzDiejb1a0", "title": "Dionysiac frieze, Villa of Mysteries, Pompeii", "kind": "Video", "description": "Dionysian Cult Cycle (?), Villa of Mysteries, before 79 C.E., fresco, Pompeii, Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "villa-of-mysteries"}], "in_knowledge_map": false, "description": "Paintings from antiquity rarely survive\u2014paint, after all, is a much less durable medium than stone or bronze sculpture. But thanks to the ancient Roman city of Pompeii we can trace the history of Roman wall painting. The entire city was buried in volcanic ash in 79 C.E. when the volcano at Mount Vesuvius erupted\u2014preserving the rich colors in the paintings in the houses and monuments there for thousands of years until their rediscovery.", "node_slug": "wall-painting", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/roman/wall-painting", "extended_slug": "humanities/ancient-art-civilizations/roman/wall-painting", "kind": "Topic", "slug": "wall-painting"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/roman/roman-republic/", "id": "roman-republic", "hide": false, "title": "Republic", "child_data": [{"kind": "Video", "id": "671260985"}, {"kind": "Article", "id": "x11bd10fc"}, {"kind": "Video", "id": "x88227945"}, {"kind": "Video", "id": "1315102373"}, {"kind": "Exercise", "id": "xad295dec"}, {"kind": "Article", "id": "x0a8e60e4"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/roman/roman-republic/temple-of-portunus-rome-c-120-80-b-c-e/", "id": "5u1Nrmdyd-A", "title": "Temple of Portunus", "kind": "Video", "description": "Temple of Portunus (formerly known as, Fortuna Virilis), travertine, tufa, and stucco, c. 120-80 B.C.E., Rome. Speakers: Beth Harris and Steven Zucker.", "slug": "temple-of-portunus-rome-c-120-80-b-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/roman/roman-republic/capitoline-brutus/", "id": "h-qUlzA70nY", "title": "Capitoline Brutus", "kind": "Video", "description": "4th-3rd century B.C.E.\u00a0bronze, 69 cm (Capitoline Museums, Rome)\n\nSpeakers; Dr. Steven Zucker and Dr. Beth Harris", "slug": "capitoline-brutus"}, {"path": "khan/humanities/ancient-art-civilizations/roman/roman-republic/veristic-male-portrait/", "id": "T0fq3XFfxrY", "title": "Veristic Male Portrait", "kind": "Video", "description": "Veristic male portrait (similar to Head of a Roman Patrician), early 1st Century B.C.E., marble life size (Vatican Museums, Rome) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "veristic-male-portrait"}, {"path": "khan/humanities/ancient-art-civilizations/roman/roman-republic/veristic-male-portrait-quiz/", "id": "veristic-male-portrait-quiz", "title": "Veristic Male Portrait (quiz)", "description": "Test your knowledge.", "slug": "veristic-male-portrait-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In legend Rome was founded in 753 B.C.E. by Romulus, its first king. In 509 B.C.E. Rome became a republic ruled by the Senate (wealthy landowners and elders) and the Roman people. During the 450 years of the republic Rome conquered the rest of Italy and then expanded into France, Spain, Turkey, North Africa and Greece. Rome became very Greek influenced or \u201cHellenized,\u201d filled with Greek architecture, literature, statues, wall-paintings, mosaics, pottery and glass. But with Greek culture came Greek gold, and generals and senators fought over this new wealth. The Republic collapsed in civil war and the Roman empire began.", "node_slug": "roman-republic", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/roman/roman-republic", "extended_slug": "humanities/ancient-art-civilizations/roman/roman-republic", "kind": "Topic", "slug": "roman-republic"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/roman/early-empire/", "id": "early-empire", "hide": false, "title": "Early empire", "child_data": [{"kind": "Video", "id": "903658510"}, {"kind": "Article", "id": "x526a4643"}, {"kind": "Exercise", "id": "x34801412"}, {"kind": "Video", "id": "1064657948"}, {"kind": "Article", "id": "x019b1aa9"}, {"kind": "Exercise", "id": "x7c84d7b3"}, {"kind": "Article", "id": "x3f4109c7"}, {"kind": "Video", "id": "x9c2a9215"}, {"kind": "Video", "id": "671422821"}, {"kind": "Exercise", "id": "xd105e2d9"}, {"kind": "Article", "id": "xda6d1688"}, {"kind": "Video", "id": "xeab5671f"}, {"kind": "Article", "id": "xb9eeefe2"}, {"kind": "Article", "id": "xa57450b8"}, {"kind": "Video", "id": "xf4c8d271"}, {"kind": "Video", "id": "671397702"}, {"kind": "Article", "id": "xc8d1ab94"}, {"kind": "Video", "id": "x71f3f592"}, {"kind": "Exercise", "id": "x1287e694"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/augustus-of-primaporta-1st-century-c-e-vatican-museums/", "id": "3i8iou6tXqY", "title": "Augustus of Primaporta", "kind": "Video", "description": "Augustus of Primaporta, 1st century C.E. (Vatican Museums). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "augustus-of-primaporta-1st-century-c-e-vatican-museums"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/augustus-of-prima-porta-quiz/", "id": "augustus-of-prima-porta-quiz", "title": "Augustus of Primaporta (quiz)", "description": "Test your knowledge.", "slug": "augustus-of-prima-porta-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/ara-pacis-augustae-altar-of-augustan-peace-13-9-b-c-e-rome/", "id": "kiMNT18c4Ko", "title": "Ara Pacis", "kind": "Video", "description": "Ara Pacis Augustae (Altar of Augustan Peace), 13-9 B.C.E.Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "ara-pacis-augustae-altar-of-augustan-peace-13-9-b-c-e-rome"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/ara-pacis-quiz/", "id": "ara-pacis-quiz", "title": "Ara Pacis (quiz)", "description": "Test your knowledge.", "slug": "ara-pacis-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/the-art-of-gem-carving/", "id": "xgTpGASqrKY", "title": "The art of gem carving", "kind": "Video", "description": "Since antiquity, gemstones have been engraved using the same methods. Watch the process from start to finish as a gem carver recreates an ancient image. Love art? Follow us on Google+", "slug": "the-art-of-gem-carving"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/colosseum-amphitheatrum-flavium-c-70-80-c-e-rome/", "id": "9wguQaBYKec", "title": "Colosseum (Flavian Amphitheater)", "kind": "Video", "description": "Colosseum (Amphitheatrum Flavium), c. 70-80 C.E., Rome Speakers: Valentina Follo (courtesy of Context Travel), Dr. Beth Harris, Dr. Steven Zucker Cover photo by Julia Avra Ugoretz Views of the Colosseum were taken from the Rome Reborn model of ancient Rome with the permission of The Rome Reborn Project (www.romereborn.virginia.edu). The model is copyright 2004 by The Regents of the University of California. All rights reserved. Speakers: Valentina Follo (courtesy of Context Travel), Dr. Beth Harris, Dr. Steven Zucker Cover photo by Julia Avra Ugoretz. Views of the Colosseum were taken from the Rome Reborn model of ancient Rome with the permission of The Rome Reborn Project (www.romereborn.virginia.edu). The model is copyright 2004 by The Regents of the University of California. All rights reserved. This video illustrates the latest version of the model (2.1), which was created from January to May, 2010.", "slug": "colosseum-amphitheatrum-flavium-c-70-80-c-e-rome"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/colosseum-quiz/", "id": "colosseum-quiz", "title": "Colosseum (quiz)", "description": "Test your knowledge.", "slug": "colosseum-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/arch-of-titus-relief/", "id": "2Pz_p8Tf24g", "title": "Relief from the Arch of Titus, showing The Spoils of Jerusalem being brought into Rome", "kind": "Video", "description": "Relief panel showing The Spoils of Jerusalem being brought into Rome, Arch of Titus, Rome, after 81 C.E., marble, 7 feet,10 inches high. Speakers: Dr. Steven Fine and Dr. Beth Harris", "slug": "arch-of-titus-relief"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/trajans-forum/", "id": "y-IAOPxkNWo", "title": "The Forum of Trajan", "kind": "Video", "description": "Apollodorus of Damascus, The Forum of Trajan, dedicated 112 C.E.., Rome. \u00a0A conversation with Dr. Beth Harris and Dr. Steven Zucker.", "slug": "trajans-forum"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/column-of-trajan-completed-113-c-e/", "id": "MFt3tHNevJg", "title": "Column of Trajan", "kind": "Video", "description": "Column of Trajan, Carrara marble, completed 113 C.E., Rome Dedicated to Emperor Trajan (Marcus Ulpius Nerva Traianus b. 53 , d. 117 C.E.) in honor of his victory over Dacia (now Romania) 101-02 and 105-06 C.E.\n\nDedicated to Emperor Trajan (Marcus Ulpius Nerva Traianus b. 53 , d. 117 C.E.) in honor of his victory over Dacia (now Romania) 101-02 and 105-06 C.E.\nThe inscription on the base is the source of the typeface Trajan and reads (with abbreviations spelled out):\n\nSENATUS POPULUSQUE ROMANUS\nIMPERATORI CAESARI DIVI NERVAE FILIO NERVAE\nTRAIANO AUGUSTO GERMANICO DACICO PONTIFICI\nMAXIMO TRIBUNICIA POTESTATE XVII IMPERATORI VI CONSULI VI PATRI PATRIAE\nAD DECLARANDUM QUANTAE ALTITUDINIS\nMONS ET LOCUS TAN[TIS OPER]IBUS SIT EGESTUS\n\nThe Senate and the People of Rome\nTo Emperor Caesar Nerva Trajan Augustus, son of the divine Nerva\nConqueror of Germany and Dacia, high priest, with the office of the tribune 17 times\nProclaimed Imperator 6 times, elected consul 6 times, father of the Empire\nHere shows the height which this hill once stood\nNow removed for such great works as these\n\nSpeakers:\u00a0Valentina Follo (courtesy of\u00a0Context Travel),\u00a0Dr. Beth Harris,\u00a0Dr. Steven Zucker", "slug": "column-of-trajan-completed-113-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/markets-of-trajan/", "id": "z83guai4S68", "title": "Markets of Trajan", "kind": "Video", "description": "Apollodorus of Damascus, The Markets of Trajan, 112 C.E., Rome Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "markets-of-trajan"}, {"path": "khan/humanities/ancient-art-civilizations/roman/early-empire/column-of-trajan-quiz/", "id": "column-of-trajan-quiz", "title": "Column of Trajan (quiz)", "description": "Test your knowledge.", "slug": "column-of-trajan-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In 31 B.C.E. Octavian, the adopted son of Julius Caesar, defeated Cleopatra and Mark Anthony at Actium. This brought the last civil war of the republic to an end. Although it was hoped by many that the republic could be restored, it soon became clear that a new political system was forming: the emperor became the focus of the empire and its people. Although, in theory, Augustus (as Octavian became known) was only the first citizen and ruled by consent of the Senate, he was in fact the empire's supreme authority. As emperor he could pass his powers to the heir he decreed and was a king in all but name.", "node_slug": "early-empire", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/roman/early-empire", "extended_slug": "humanities/ancient-art-civilizations/roman/early-empire", "kind": "Topic", "slug": "early-empire"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/", "id": "middle-empire", "hide": false, "title": "Middle empire", "child_data": [{"kind": "Article", "id": "x4195279e"}, {"kind": "Video", "id": "671563202"}, {"kind": "Exercise", "id": "xbbac9235"}, {"kind": "Video", "id": "888761224"}, {"kind": "Video", "id": "x4da6e65d"}, {"kind": "Video", "id": "1261276479"}, {"kind": "Video", "id": "1064651977"}, {"kind": "Video", "id": "x479ff0f3"}, {"kind": "Video", "id": "719842160"}, {"kind": "Article", "id": "x2d1dc5d1"}, {"kind": "Video", "id": "671539946"}, {"kind": "Exercise", "id": "xbb61c81e"}, {"kind": "Video", "id": "1250456711"}, {"kind": "Exercise", "id": "x83a37e50"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/the-pantheon-rome-c-125/", "id": "KaY8zqYfQI0", "title": "The Pantheon", "kind": "Video", "description": "The Pantheon, Rome, c. 125 Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "the-pantheon-rome-c-125"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/pantheon-quiz/", "id": "pantheon-quiz", "title": "Pantheon (quiz)", "description": "Test your knowledge.", "slug": "pantheon-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/a-tour-of-hadrian-s-villa-with-dr-bernard-frischer/", "id": "Nu_6X04EGHk", "title": "Hadrian's Villa, Tivoli: A virtual tour", "kind": "Video", "description": "A virtual tour of Hadrian's Villa using a 3D digital model of the villa created under the direction of Dr. Bernard Frischer. The ruins of Hadrian's Villa, in the town of Tivoli, near Rome, is spread over an area of approximately 250 acres. Many of the structures were designed by the Emperor Hadrian who ruled from 117 until his death in 138 C.E. This virtual rendering is based on current archeological research and has been created in consultation with art historians, archaeologists, and museum curators with expertise in this area. Please note, a few features are necessarily assumptions based on the best available evidence. Speakers: Dr. Bernard Frischer and Dr. Beth Harris", "slug": "a-tour-of-hadrian-s-villa-with-dr-bernard-frischer"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/hadrian-imperial-palace/", "id": "t6npEWNrHGM", "title": "Hadrian, The imperial palace, Tivoli", "kind": "Video", "description": "Hadrian built himself a vast palace in the countryside, the villa Adriana in Tivoli about 30 kilometres east of Rome. It was a huge complex, designed to accommodate thousands of people. It was his administrative capital and represents his empire in miniature. British Museum Director Neil MacGregor visits. \u00a9 Trustees of the British Museum", "slug": "hadrian-imperial-palace"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/emperor-hadrian-s-private-retreat-the-maritime-theatre-at-hadrian-s-villa-tivoli/", "id": "hGMwMlksZlM", "title": "Maritime Theatre at Hadrian's Villa, Tivoli", "kind": "Video", "description": "Maritime Theatre at Hadrian's Villa, Tivoli, Villa begun in 117 C.E. \n\nA conversation with Dr. Bernard Frischer and Dr. Beth Harris", "slug": "emperor-hadrian-s-private-retreat-the-maritime-theatre-at-hadrian-s-villa-tivoli"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/pair-of-centaurs-fighting-cats-of-prey-from-hadrian-s-villa-c-130-b-c-e-1/", "id": "L5OkFR8GScU", "title": "Pair of Centaurs Fighting Cats of Prey from Hadrian's Villa, Tivoli", "kind": "Video", "description": "Pair of Centaurs Fighting Cats of Prey from Hadrian's Villa, mosaic, c. 130 C.E. (Altes Museum, Berlin) Speakers: Dr. Beth Harris, Dr. Steven Zucker See this on Smarthistory: http://smarthistory.khanacademy.org/pair-of-centaurs-fighting-cats-of-prey-from-hadrians-villa.html View this mosaic up close in the Google Art Project", "slug": "pair-of-centaurs-fighting-cats-of-prey-from-hadrian-s-villa-c-130-b-c-e-1"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/hadrian-building-the-wall/", "id": "dCSH7ok7ejI", "title": "Hadrian, Building the wall", "kind": "Video", "description": "In 122 C.E. Hadrian ordered a mighty frontier system to be built across the north of Britain. The result was Hadrian's Wall, a 73 mile barrier stretching from the Solway Firth on the west coast of Britain to the River Tyne on the east coast.\u00a0\u00a9 Trustees of the British Museum", "slug": "hadrian-building-the-wall"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/medea-sarcophagus-140-150-c-e/", "id": "wE7_9Xce6LM", "title": "Empire: Medea Sarcophagus", "kind": "Video", "description": "Medea Sarcophagus, 140 - 150 C.E., marble, 65 x 227 cm (Altes Museum, Berlin)", "slug": "medea-sarcophagus-140-150-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/equestrian-sculpture-of-marcus-aurelius-c-173-76-c-e/", "id": "D4nK5uXuPXM", "title": "Equestrian Sculpture of Marcus Aurelius", "kind": "Video", "description": "Empire: Equestrian Sculpture of Marcus Aurelius, bronze, c. 173-76 C.E., (Capitoline Museums, Rome). The original location of the sculpture is unknown though it had been housed in the Lateran Palace since the 8th century until it was placed in the center of the Piazza del Campidoglio by Michelangelo in 1538. The original is now indoors for purposes of conservation. Marcus Aurelius ruled 161-180 C.E.", "slug": "equestrian-sculpture-of-marcus-aurelius-c-173-76-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/equestrian-sculpture-of-marcus-aurelius-quiz/", "id": "equestrian-sculpture-of-marcus-aurelius-quiz", "title": "Equestrian Sculpture of Marcus Aurelius (quiz)", "description": "Test your knowledge.", "slug": "equestrian-sculpture-of-marcus-aurelius-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/battle-of-the-romans-and-barbarians-ludovisi-battle-sarcophagus-c-250-260-c-e/", "id": "m4raOIxsbaU", "title": "Ludovisi Battle Sarcophagus", "kind": "Video", "description": "Battle of the Romans and Barbarians (Ludovisi Battle Sarcophagus), c. 250-260 C.E. (Museo Nazionale Romano-Palazzo Altemps, Rome)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "battle-of-the-romans-and-barbarians-ludovisi-battle-sarcophagus-c-250-260-c-e"}, {"path": "khan/humanities/ancient-art-civilizations/roman/middle-empire/ludovisi-battle-sarcophagus-quiz/", "id": "ludovisi-battle-sarcophagus-quiz", "title": "Ludovisi Battle Sarcophagus (quiz)", "description": "Test your knowledge.", "slug": "ludovisi-battle-sarcophagus-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The imperial system of the Roman Empire depended heavily on the personality and standing of the emperor himself. The reigns of weak or unpopular emperors often ended in bloodshed at Rome and chaos throughout the empire as a whole. In the third century C.E. the very existence of the empire was threatened by a combination of economic crisis, weak and short-lived emperors and usurpers (and the violent civil wars between their rival supporting armies), and massive barbarian penetration into Roman territory.", "node_slug": "middle-empire", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/roman/middle-empire", "extended_slug": "humanities/ancient-art-civilizations/roman/middle-empire", "kind": "Topic", "slug": "middle-empire"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/ancient-art-civilizations/roman/late-empire/", "id": "late-empire", "hide": false, "title": "Late empire", "child_data": [{"kind": "Video", "id": "x0b7253d3"}, {"kind": "Video", "id": "x6c6287fc"}, {"kind": "Video", "id": "1159804193"}, {"kind": "Exercise", "id": "x1f38aa2b"}, {"kind": "Video", "id": "671260984"}, {"kind": "Exercise", "id": "x9484c684"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/roman/late-empire/tetrarchs/", "id": "Dui5V8TZYbE", "title": "Portraits of the Four Tetrarchs", "kind": "Video", "description": "Portraits of the Four Tetrarchs, from Constantinople, c. 305, porphyry, 4' 3\" high (St. Marks, Venice). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "tetrarchs"}, {"path": "khan/humanities/ancient-art-civilizations/roman/late-empire/basilica-constantine/", "id": "tZQJgqBcyw4", "title": "Basilica of Maxentius and Constantine", "kind": "Video", "description": "Basilica of Maxentius and Constantine (Basilica Nova), Roman Forum, c. 306-312\nSpeakers: Dr. Darius Arya and Dr. Beth Harris", "slug": "basilica-constantine"}, {"path": "khan/humanities/ancient-art-civilizations/roman/late-empire/colossus-of-constantine/", "id": "MuD06cnjtAM", "title": "The Colossus of Constantine", "kind": "Video", "description": "The Colossus of Constantine, c. 312-15, Palazzo dei Conservatori, Musei Capitolini, Rome\n\nA conversation between Dr. Beth Harris and Dr. Steven Zucker in front of the Colossus of Constantine.", "slug": "colossus-of-constantine"}, {"path": "khan/humanities/ancient-art-civilizations/roman/late-empire/colossus-of-constantine-quiz/", "id": "colossus-of-constantine-quiz", "title": "Colossus of Constantine (quiz)", "description": "Test your knowledge.", "slug": "colossus-of-constantine-quiz", "kind": "Exercise"}, {"path": "khan/humanities/ancient-art-civilizations/roman/late-empire/arch-of-constantine-315-c-e/", "id": "mK9y-sPn_AY", "title": "Empire: Arch of Constantine", "kind": "Video", "description": "Arch of Constantine, 315 C.E., Rome Speakers: Valentina Follo, Dr. Beth Harris, Dr. Steven Zucker", "slug": "arch-of-constantine-315-c-e"}], "in_knowledge_map": false, "description": "Financial pressures, urban decline, underpaid troops and consequently overstretched frontiers - all of these finally caused the collapse of the western empire under waves of barbarian incursions in the early fifth century C.E. The last western emperor, Romulus Augustus, was deposed in 476 C.E., though the empire in the east, centered on Byzantium (Constantinople), continued until the fifteenth century.", "node_slug": "late-empire", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/roman/late-empire", "extended_slug": "humanities/ancient-art-civilizations/roman/late-empire", "kind": "Topic", "slug": "late-empire"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/ancient-art-civilizations/roman/rome-quiz/", "id": "rome-quiz", "hide": false, "title": "Ancient Rome (quiz)", "child_data": [{"kind": "Exercise", "id": "x58b2e20f"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/roman/rome-quiz/ancient-rome/", "id": "ancient-rome", "title": "Ancient Rome (quiz)", "slug": "ancient-rome", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "rome-quiz", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/roman/rome-quiz", "extended_slug": "humanities/ancient-art-civilizations/roman/rome-quiz", "kind": "Topic", "slug": "rome-quiz"}], "in_knowledge_map": false, "description": "The brilliance of ancient Roman art can be seen in the wall paintings of Pompeii, the massive ambition of the Colosseum, and the daring engineering of the Pantheon.", "node_slug": "roman", "render_type": "Topic", "topic_page_url": "/humanities/ancient-art-civilizations/roman", "extended_slug": "humanities/ancient-art-civilizations/roman", "kind": "Topic", "slug": "roman"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/ancient-art-civilizations/judaism-art/", "id": "judaism-art", "hide": false, "title": "Judaism and art", "child_data": [{"kind": "Article", "id": "x3764d4d5"}, {"kind": "Article", "id": "xb12b5598"}, {"kind": "Article", "id": "x6873464c"}, {"kind": "Article", "id": "xe1b02e6b"}, {"kind": "Article", "id": "x2a75ebe9"}, {"kind": "Video", "id": "xeab5671f"}, {"kind": "Article", "id": "x0f6cf52d"}, {"kind": "Article", "id": "x87352589"}], "children": [{"path": "khan/humanities/ancient-art-civilizations/judaism-art/arch-of-titus-relief/", "id": "2Pz_p8Tf24g", "title": "Relief from the Arch of Titus, showing The Spoils of Jerusalem being brought into Rome", "kind": "Video", "description": "Relief panel showing The Spoils of Jerusalem being brought into Rome, Arch of Titus, Rome, after 81 C.E., marble, 7 feet,10 inches high. Speakers: Dr. Steven Fine and Dr. Beth Harris", "slug": "arch-of-titus-relief"}], "in_knowledge_map": false, "description": "Judaism is an ancient monotheistic religion with a focus on sacred texts rather than sacred images, making its art an especially interesting area of study.", "node_slug": "judaism-art", "render_type": "Tutorial", "topic_page_url": "/humanities/ancient-art-civilizations/judaism-art", "extended_slug": "humanities/ancient-art-civilizations/judaism-art", "kind": "Topic", "slug": "judaism-art"}], "in_knowledge_map": false, "description": "3000 B.C.E. - 400 C.E.: The Great Pyramids at Giza, the Parthenon, the Colosseum, and more.", "node_slug": "ancient-art-civilizations", "render_type": "Subject", "topic_page_url": "/humanities/ancient-art-civilizations", "extended_slug": "humanities/ancient-art-civilizations", "kind": "Topic", "slug": "ancient-art-civilizations"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/medieval-world/", "id": "medieval-world", "hide": false, "title": "Art of Medieval Europe", "child_data": [{"kind": "Topic", "id": "x1a0b281c"}, {"kind": "Topic", "id": "x35d0aeea"}, {"kind": "Topic", "id": "xebb9870d"}, {"kind": "Topic", "id": "xf8d33f1e"}, {"kind": "Topic", "id": "xefbfc4e0"}, {"kind": "Topic", "id": "x7d52d09a"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/medieval-europe/", "id": "medieval-europe", "hide": false, "title": "A beginner's guide to medieval Europe", "child_data": [{"kind": "Article", "id": "1364114303"}, {"kind": "Article", "id": "x3a5c3e8a"}, {"kind": "Article", "id": "x11ccc801"}, {"kind": "Article", "id": "x1bd538d7"}, {"kind": "Article", "id": "x9d5930d9"}, {"kind": "Article", "id": "x823afbf3"}, {"kind": "Video", "id": "x0677cedc"}, {"kind": "Video", "id": "xef680044"}, {"kind": "Video", "id": "xb59f5972"}, {"kind": "Video", "id": "x42923f86"}, {"kind": "Article", "id": "x4b25440f"}, {"kind": "Video", "id": "xc785e5d0"}, {"kind": "Exercise", "id": "x5a602b2d"}], "children": [{"path": "khan/humanities/medieval-world/medieval-europe/making-manuscripts/", "id": "nuNfdHNTv9o", "title": "Making manuscripts", "kind": "Video", "description": "An illuminated manuscript is a book written and decorated completely by hand. Such manuscripts were among the most precious objects in medieval and early Renaissance monasteries and courts. Discover how skilled artists and craftspeople created these beautiful illuminated masterpieces. Love art? Follow us on Google+", "slug": "making-manuscripts"}, {"path": "khan/humanities/medieval-world/medieval-europe/manuscripts/", "id": "e_Us5TGPFe0", "title": "Manuscripts: major works of art", "kind": "Video", "description": "Illuminated manuscripts are books from early medieval times through the Renaissance. Considered major works of art, they were written and decorated by hand with gold, silver, lapis, and other precious materials. Explore several exemplars, including the finest German illuminated manuscript of the 12th century, the Stammheim Missal, as well as other religious and secular works. Love art? Follow us on Google+", "slug": "manuscripts"}, {"path": "khan/humanities/medieval-world/medieval-europe/medieval-calendar/", "id": "h2CcewghKoo", "title": "The medieval calendar", "kind": "Video", "description": "The medieval calendar served as a map of the Church year and featured illustrations of saints, feasts, monthly labors, leisure activities, and signs of the zodiac. Learn how to read one, and discover the meanings of the illustrations. Love art? Follow us on Google+", "slug": "medieval-calendar"}, {"path": "khan/humanities/medieval-world/medieval-europe/medieval-goldsmiths/", "id": "6Og8EvH_2mY", "title": "Medieval goldsmiths - Treasures of Heaven at the British Museum", "kind": "Video", "description": "Medieval goldsmiths were some of the most important craftsmen because they worked with precious metals.\u00a0\u00a9 Trustees of the British Museum", "slug": "medieval-goldsmiths"}, {"path": "khan/humanities/medieval-world/medieval-europe/chivalry-middle-ages/", "id": "T7j0V1AHvBU", "title": "Chivalry in the Middle Ages", "kind": "Video", "description": "Chivalric customs arose from the medieval knight's code of conduct, and were gradually adopted by aristocrats and society as a whole. Learn about the elements of the code and some surprising early applications, as depicted in illuminated manuscripts. Love art? Follow us on Google+", "slug": "chivalry-middle-ages"}, {"path": "khan/humanities/medieval-world/medieval-europe/beginners-guide-to-medieval-art/", "id": "beginners-guide-to-medieval-art", "title": "Beginner's guide to medieval art (quiz)", "description": "Test your knowledge.", "slug": "beginners-guide-to-medieval-art", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The Middle Ages lasted 1000 years. Learn how manuscripts were made, how medieval calendars worked, and how Christ's life was represented.", "node_slug": "medieval-europe", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/medieval-europe", "extended_slug": "humanities/medieval-world/medieval-europe", "kind": "Topic", "slug": "medieval-europe"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/medieval-world/medieval-book/", "id": "medieval-book", "hide": false, "title": "Books and the dissemination of knowledge in medieval Europe", "child_data": [{"kind": "Topic", "id": "xd86de4c8"}, {"kind": "Topic", "id": "x5e713f7b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/medieval-world/medieval-book/making-medieval-book/", "id": "making-medieval-book", "hide": false, "title": "Making the medieval book", "child_data": [{"kind": "Video", "id": "x35fc3d0d"}, {"kind": "Article", "id": "x07f7d56c"}, {"kind": "Article", "id": "x15993e5d"}, {"kind": "Video", "id": "x7fcefddb"}, {"kind": "Article", "id": "x9d2c34f0"}, {"kind": "Article", "id": "xb1008cfc"}, {"kind": "Video", "id": "x74f94928"}, {"kind": "Article", "id": "x37c97a4a"}, {"kind": "Article", "id": "xd922c94a"}, {"kind": "Article", "id": "xc3e05e1d"}, {"kind": "Article", "id": "xc4e826aa"}, {"kind": "Article", "id": "x28299db2"}, {"kind": "Article", "id": "x788d3239"}, {"kind": "Video", "id": "x0677cedc"}], "children": [{"path": "khan/humanities/medieval-world/medieval-book/making-medieval-book/listening-to-the-medieval-book/", "id": "lJvXorny8xw", "title": "Listening to the Medieval book", "kind": "Video", "description": "Dr. Erik Kwakkel and Dr. Beth Harris look at two manuscripts: 1) Boethius, De institutione arithmetica, c. 1100, \u00a0The Hague), Royal Library, MS 78 E 59 and 2) Paris Bible, mid 13th century, The Hague, Royal Library, \u00a0MS 132 F 21 . With special thanks to Ed van der Vlist, Curator of Medieval Manuscripts, Koninklijke Bibliotheek, National Library of the Netherlands", "slug": "listening-to-the-medieval-book"}, {"path": "khan/humanities/medieval-world/medieval-book/making-medieval-book/an-introduction-to-medieval-scripts/", "id": "NnjN9GGfV6E", "title": "An introduction to Medieval scripts", "kind": "Video", "description": "Can you tell the difference between Carolingian Minuscule and Gothic script? Watch this video and you'll learn how. A conversation with Dr. Erik Kwakkel and Dr. Beth Harris about medieval scripts at the National Library of the Netherlands, in The Hague.", "slug": "an-introduction-to-medieval-scripts"}, {"path": "khan/humanities/medieval-world/medieval-book/making-medieval-book/medieval-textbook/", "id": "okxU0GB2eCM", "title": "A Medieval textbook", "kind": "Video", "description": "Dr. Erik Kwakkel and Dr. Beth Harris look at a medieval textbook: Boethius, De institutione arithmetica, c. 1100 (National Library of the Netherlands, The Hague, \u00a0MS 78 E 59). With special thanks to Ed van der Vlist, Curator of Medieval Manuscripts, Koninklijke Bibliotheek, National Library of the Netherlands", "slug": "medieval-textbook"}, {"path": "khan/humanities/medieval-world/medieval-book/making-medieval-book/making-manuscripts/", "id": "nuNfdHNTv9o", "title": "Making manuscripts", "kind": "Video", "description": "An illuminated manuscript is a book written and decorated completely by hand. Such manuscripts were among the most precious objects in medieval and early Renaissance monasteries and courts. Discover how skilled artists and craftspeople created these beautiful illuminated masterpieces. Love art? Follow us on Google+", "slug": "making-manuscripts"}], "in_knowledge_map": false, "description": "The production of a manuscript was a long, complex and expensive process. It involved making parchment from animal skin, pricking and ruling hundreds of pages, and writing down long texts by hand, one letter at the time. When the binding was finally added, an object was born that weighed several kilos and could cost as much as a car today.", "node_slug": "making-medieval-book", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/medieval-book/making-medieval-book", "extended_slug": "humanities/medieval-world/medieval-book/making-medieval-book", "kind": "Topic", "slug": "making-medieval-book"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/medieval-world/medieval-book/using-medieval-book/", "id": "using-medieval-book", "hide": false, "title": "Using the medieval book", "child_data": [{"kind": "Article", "id": "x8f169efc"}, {"kind": "Article", "id": "xae8787d0"}, {"kind": "Article", "id": "x61bdea02"}, {"kind": "Article", "id": "x1d538595"}, {"kind": "Article", "id": "xda1f32f9"}, {"kind": "Article", "id": "x1f671a13"}, {"kind": "Article", "id": "x2b8ea683"}, {"kind": "Video", "id": "xb59f5972"}, {"kind": "Article", "id": "x0e2b5f8d"}], "children": [{"path": "khan/humanities/medieval-world/medieval-book/using-medieval-book/medieval-calendar/", "id": "h2CcewghKoo", "title": "The medieval calendar", "kind": "Video", "description": "The medieval calendar served as a map of the Church year and featured illustrations of saints, feasts, monthly labors, leisure activities, and signs of the zodiac. Learn how to read one, and discover the meanings of the illustrations. Love art? Follow us on Google+", "slug": "medieval-calendar"}], "in_knowledge_map": false, "description": "This tutorial discusses how books were used in medieval times. After a manuscript was produced it came into circulation in a monastery, became part of a private library, or ended up in the hands of a student. Readers\u2019 interactions with books left physical traces, such as wear-and-tear, bookmarks, corrections and marginal notes. They reflect how the book was handled, what was deemed important information, and how that information was used.", "node_slug": "using-medieval-book", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/medieval-book/using-medieval-book", "extended_slug": "humanities/medieval-world/medieval-book/using-medieval-book", "kind": "Topic", "slug": "using-medieval-book"}], "in_knowledge_map": false, "description": "Before the invention of print, books were written by hand and made at the request of a reader. Because each book was unique, they can tell us about how people consumed knowledge and interacted with it.", "node_slug": "medieval-book", "render_type": "Topic", "topic_page_url": "/humanities/medieval-world/medieval-book", "extended_slug": "humanities/medieval-world/medieval-book", "kind": "Topic", "slug": "medieval-book"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/early-christian1/", "id": "early-christian1", "hide": false, "title": "Early Christian", "child_data": [{"kind": "Article", "id": "x34afd775"}, {"kind": "Article", "id": "x679d2c18"}, {"kind": "Video", "id": "x5b2ac6da"}, {"kind": "Article", "id": "x30e459d3"}, {"kind": "Article", "id": "xf0dde873"}, {"kind": "Article", "id": "xc2a237bf"}, {"kind": "Video", "id": "671563205"}, {"kind": "Article", "id": "x418cc42c"}, {"kind": "Exercise", "id": "xe33392bd"}, {"kind": "Video", "id": "xfe518fe3"}, {"kind": "Article", "id": "x3a20af53"}, {"kind": "Exercise", "id": "x876e4e1c"}, {"kind": "Video", "id": "671260987"}, {"kind": "Video", "id": "xa07bc038"}, {"kind": "Article", "id": "xd3bf6779"}, {"kind": "Video", "id": "x457c9163"}, {"kind": "Exercise", "id": "x448d4e6e"}, {"kind": "Exercise", "id": "x17c19b86"}], "children": [{"path": "khan/humanities/medieval-world/early-christian1/catacomb-priscilla/", "id": "z_5AAk1jABI", "title": "Catacomb of Priscilla, Rome", "kind": "Video", "description": "Catacomb of Priscilla, Rome, late 2nd century through the 4th century C.E.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "catacomb-priscilla"}, {"path": "khan/humanities/medieval-world/early-christian1/sarcophagus-of-junius-bassus-marble-359-c-e/", "id": "UjX4ExCixWY", "title": "Sarcophagus of Junius Bassus", "kind": "Video", "description": "Sarcophagus of Junius Bassus, marble, 359 C.E. (Treasury of Saint Peter's Basilica)\n\nPlease note that due to photography restrictions, the images used in the video above\nshow the plaster cast on display in the Vatican Museum. Nevertheless, the audio conversation\nwas recorded in the treasury in Saint Peter's Basilica, in front of the original sarcophagus.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker \n\nhttp://www.smarthistory.org/sarcophagus-of-junius-bassus.html", "slug": "sarcophagus-of-junius-bassus-marble-359-c-e"}, {"path": "khan/humanities/medieval-world/early-christian1/sarcophagus-of-junius-bassus-quiz/", "id": "sarcophagus-of-junius-bassus-quiz", "title": "Sarcophagus of Junius Bassus (quiz)", "description": "Test your knowledge.", "slug": "sarcophagus-of-junius-bassus-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/early-christian1/santa-sabina-rome/", "id": "HjBfBB9r2QM", "title": "Basilica of Santa Sabina, Rome", "kind": "Video", "description": "Basilica of Santa Sabina, 422-432, Rome Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "santa-sabina-rome"}, {"path": "khan/humanities/medieval-world/early-christian1/santa-sabina-quiz/", "id": "santa-sabina-quiz", "title": "Santa Sabina (quiz)", "description": "Test your knowledge.", "slug": "santa-sabina-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/early-christian1/basilica-of-santa-maria-maggiore-rome-5th-century-a-d/", "id": "S2P4I_hFnFI", "title": "Santa Maria Maggiore", "kind": "Video", "description": "Basilica of Santa Maria Maggiore, Rome, 5th century A.D. \n\nA Smarthistory video with partner Context Travel. Speakers: Dr. Steven Zucker and Richard Bowen.", "slug": "basilica-of-santa-maria-maggiore-rome-5th-century-a-d"}, {"path": "khan/humanities/medieval-world/early-christian1/vienna-genesis/", "id": "ogrRKL30iJ8", "title": "Jacob wresting the angel, Vienna Genesis", "kind": "Video", "description": "The Story of Jacob, Vienna Genesis, \u00a0folio 12v, early 6th century, \u00a0tempera, gold and silver on purple vellum, \u00a0cod. theol. gr. 31 (\u00d6sterreichische Nationalbibliothek, Vienna). Speakers: Dr. Nancy Ross and Dr. Steven Zucker", "slug": "vienna-genesis"}, {"path": "khan/humanities/medieval-world/early-christian1/the-mausoleum-of-galla-placidia-ravenna/", "id": "yvnr0wnmoGY", "title": "The Mausoleum of Galla Placidia, Ravenna", "kind": "Video", "description": "The Mausoleum of Galla Placidia, 425 C.E., Ravenna, Italy\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "the-mausoleum-of-galla-placidia-ravenna"}, {"path": "khan/humanities/medieval-world/early-christian1/mausoleum-of-galla-placidia-quiz/", "id": "mausoleum-of-galla-placidia-quiz", "title": "Mausoleum of Galla Placidia (quiz)", "description": "Test your knowledge.", "slug": "mausoleum-of-galla-placidia-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/early-christian1/early-christian/", "id": "early-christian", "title": "Early Christian art (quiz)", "description": "Test your knowledge!", "slug": "early-christian", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Persecutions of Christians ended in Rome with Emperor Constantine. 4th century churches, tombs and catacombs decorated with Christian imagery can still be visited.", "node_slug": "early-christian1", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/early-christian1", "extended_slug": "humanities/medieval-world/early-christian1", "kind": "Topic", "slug": "early-christian1"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/medieval-world/byzantine1/", "id": "byzantine1", "hide": false, "title": "Byzantine (late Roman Empire)", "child_data": [{"kind": "Topic", "id": "xc01d442e"}, {"kind": "Topic", "id": "x675b8854"}, {"kind": "Topic", "id": "x0ca82f5c"}, {"kind": "Topic", "id": "x5b0c68b7"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/byzantine1/constantinople-east/", "id": "constantinople-east", "hide": false, "title": "Constantinople and the East", "child_data": [{"kind": "Video", "id": "xd2e254f8"}, {"kind": "Article", "id": "x94b961c7"}, {"kind": "Video", "id": "xcc644d79"}, {"kind": "Video", "id": "x4790f2c8"}, {"kind": "Exercise", "id": "x24bcc967"}, {"kind": "Video", "id": "xa8c8ced4"}, {"kind": "Article", "id": "x30b44672"}, {"kind": "Video", "id": "671711106"}, {"kind": "Article", "id": "x08d662a7"}, {"kind": "Video", "id": "671539955"}], "children": [{"path": "khan/humanities/medieval-world/byzantine1/constantinople-east/hagia-sophia-istanbul/", "id": "XfpusWEd2jE", "title": "Hagia Sophia, Istanbul", "kind": "Video", "description": "Hagia Sophia, Istanbul, 532-37 (architects: Isidore of Miletus and Anthemius of Tralles)\nA conversation with Dr. Steven Zucker and Dr. Beth Harris", "slug": "hagia-sophia-istanbul"}, {"path": "khan/humanities/medieval-world/byzantine1/constantinople-east/hagia-sophia-apse/", "id": "EmQ1TdoT-zE", "title": "Theotokos mosaic, apse, Hagia Sophia, Istanbul", "kind": "Video", "description": "Theotokos mosaic, 867, apse, Hagia Sophia, Istanbul\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "hagia-sophia-apse"}, {"path": "khan/humanities/medieval-world/byzantine1/constantinople-east/deesis-mosaic/", "id": "2JxIjfqKTLs", "title": "De\u00ebsis mosaic, Hagia Sophia, Istanbul", "kind": "Video", "description": "De\u00ebsis (Christ with the Virgin Mary and John the Baptist), c. 1261, mosaic, imperial enclosure, south gallery, Hagia Sophia, Istanbul\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "deesis-mosaic"}, {"path": "khan/humanities/medieval-world/byzantine1/constantinople-east/hagia-sophia-quiz/", "id": "hagia-sophia-quiz", "title": "Hagia Sophia (quiz)", "description": "Test your knowledge.", "slug": "hagia-sophia-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/byzantine1/constantinople-east/hagia-sophia-mosque/", "id": "r6383ZDXB0Q", "title": "Hagia Sophia as a mosque", "kind": "Video", "description": "This video focuses on Hagia Sophia after the conquest of Constantinople by the Ottomans in 1453.\u00a0Speakers: Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker", "slug": "hagia-sophia-mosque"}, {"path": "khan/humanities/medieval-world/byzantine1/constantinople-east/byzantine-panel-with-archangel-c-525-50/", "id": "f7J0WQsajX8", "title": "Ivory panel with Archangel", "kind": "Video", "description": "Byzantine panel with archangel, Ivory leaf from diptych, c. 525-50, 16.8 x 5.6 x 0.35 in. (42.8 x 14.3 x 0.9 cm), probably from Constantinople (modern Istanbul, Turkey), (British Museum, London) The British Museum translates the text at the top of the panel as: \"Receive the suppliant before you, despite his sinfulness.\" Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "byzantine-panel-with-archangel-c-525-50"}, {"path": "khan/humanities/medieval-world/byzantine1/constantinople-east/icon-of-the-triumph-of-orthodoxy-byzantine-c-1400/", "id": "ZH0P0uBY3PY", "title": "Icon of the Triumph of Orthodoxy", "kind": "Video", "description": "Icon of the Triumph of Orthodoxy (Byzantine), c. 1400, tempera and gold on wood, 39 cm x 31 cm (British Museum, London) Speakers: Pippa Couch and Rachel Ropeik", "slug": "icon-of-the-triumph-of-orthodoxy-byzantine-c-1400"}], "in_knowledge_map": false, "description": "This tutorial focuses on Byzantine art made in the east, what is today Greece, Turkey, and the Middle East.", "node_slug": "constantinople-east", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/byzantine1/constantinople-east", "extended_slug": "humanities/medieval-world/byzantine1/constantinople-east", "kind": "Topic", "slug": "constantinople-east"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/byzantine1/venice-ravenna/", "id": "venice-ravenna", "hide": false, "title": "Venice and Ravenna", "child_data": [{"kind": "Video", "id": "671539948"}, {"kind": "Article", "id": "x48ed6868"}, {"kind": "Exercise", "id": "x876de780"}, {"kind": "Video", "id": "x12d7a2f1"}, {"kind": "Video", "id": "x12c78a8b"}], "children": [{"path": "khan/humanities/medieval-world/byzantine1/venice-ravenna/justinian-and-his-attendants-6th-century-ravenna/", "id": "It3i-dKusIM", "title": "San Vitale, Ravenna", "kind": "Video", "description": "San Vitale is one of the most important surviving examples of Byzantine architecture and mosaic work. It was begun in 526 or 527 under Ostrogothic rule. It was consecrated in 547 and completed soon after. Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "justinian-and-his-attendants-6th-century-ravenna"}, {"path": "khan/humanities/medieval-world/byzantine1/venice-ravenna/san-vitale-quiz/", "id": "san-vitale-quiz", "title": "San Vitale (quiz)", "description": "Test your knowledge.", "slug": "san-vitale-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/byzantine1/venice-ravenna/sant-apollinare-in-classe/", "id": "HjwELgIh_qc", "title": "Sant'Apollinare in Classe, Ravenna", "kind": "Video", "description": "Sant'Apollinare in Classe, Ravenna, Italy, c. 533-49 (apse mosaic, 6th century, triumphal arch mosaics, likely c. 7th-12th centuries) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "sant-apollinare-in-classe"}, {"path": "khan/humanities/medieval-world/byzantine1/venice-ravenna/saint-marks/", "id": "_fAgls5bGXs", "title": "Saint Mark's Basilica, Venice", "kind": "Video", "description": "Saint Mark's Basilica, Venice, begun 1063 and Anastasis (The Harrowing of Hell) mosaic, c. 1180-1200, Middle Byzantine. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "saint-marks"}], "in_knowledge_map": false, "description": "Learn here about the impact of the Byzantine Empire on the Italian cities of Venice and Ravenna and discover some of the most glorious mosaics ever made.", "node_slug": "venice-ravenna", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/byzantine1/venice-ravenna", "extended_slug": "humanities/medieval-world/byzantine1/venice-ravenna", "kind": "Topic", "slug": "venice-ravenna"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/medieval-world/byzantine1/quiz-byzantine/", "id": "quiz-byzantine", "hide": false, "title": "Quiz: Byzantine art", "child_data": [{"kind": "Exercise", "id": "x3176e26c"}], "children": [{"path": "khan/humanities/medieval-world/byzantine1/quiz-byzantine/byzantine-art/", "id": "byzantine-art", "title": "Byzantine art (quiz)", "description": "Test your knowledge!", "slug": "byzantine-art", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "quiz-byzantine", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/byzantine1/quiz-byzantine", "extended_slug": "humanities/medieval-world/byzantine1/quiz-byzantine", "kind": "Topic", "slug": "quiz-byzantine"}], "in_knowledge_map": false, "description": "Constantinople (now Istanbul) was the capital of the late Roman empire, but its ethereal mosaics, ivories, and metalwork often depart from classical naturalism.", "node_slug": "byzantine1", "render_type": "Topic", "topic_page_url": "/humanities/medieval-world/byzantine1", "extended_slug": "humanities/medieval-world/byzantine1", "kind": "Topic", "slug": "byzantine1"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/medieval-world/latin-western-europe/", "id": "latin-western-europe", "hide": false, "title": "Latin (Western) Europe", "child_data": [{"kind": "Topic", "id": "x8149f596"}, {"kind": "Topic", "id": "x6df69271"}, {"kind": "Topic", "id": "xb399242d"}, {"kind": "Topic", "id": "x4ad16f1d"}, {"kind": "Topic", "id": "xce8f6cb8"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/latin-western-europe/early-medieval/", "id": "early-medieval", "hide": false, "title": "Early medieval", "child_data": [{"kind": "Article", "id": "x1b10b412"}, {"kind": "Exercise", "id": "xcca649ed"}, {"kind": "Article", "id": "xe8c92241"}, {"kind": "Article", "id": "x709fec84"}, {"kind": "Video", "id": "669432578"}, {"kind": "Article", "id": "x09b62efb"}, {"kind": "Article", "id": "x4757d183"}, {"kind": "Exercise", "id": "xe535f13a"}, {"kind": "Article", "id": "xf5165538"}, {"kind": "Article", "id": "xbb4b8d8e"}, {"kind": "Article", "id": "xe6ea88b3"}, {"kind": "Article", "id": "x059e1de3"}, {"kind": "Article", "id": "x74ec8905"}, {"kind": "Exercise", "id": "xc0c68ea1"}, {"kind": "Exercise", "id": "x9959456c"}], "children": [{"path": "khan/humanities/medieval-world/latin-western-europe/early-medieval/fibulae-quiz/", "id": "fibulae-quiz", "title": "Fibulae (quiz)", "description": "Test your knowledge.", "slug": "fibulae-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/latin-western-europe/early-medieval/sutton-hoo-ship-burial-c-700/", "id": "dWxcQZBM3eQ", "title": "Sutton Hoo ship burial", "kind": "Video", "description": "Sutton Hoo Ship Burial, c. 700 (British Museum, London)\n\nMultiple bronze, gold and silver objects of Anglo Saxon origin, found in Suffolk, England, including: a helmet, sceptre, sword, hanging bowl, bowls and spoons, shoulder clasps, a belt buckle, and purse lid.\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "sutton-hoo-ship-burial-c-700"}, {"path": "khan/humanities/medieval-world/latin-western-europe/early-medieval/sutton-hoo-ship-burial-quiz/", "id": "sutton-hoo-ship-burial-quiz", "title": "Sutton Hoo ship burial (quiz)", "description": "Test your knowledge.", "slug": "sutton-hoo-ship-burial-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/latin-western-europe/early-medieval/lindisfarne-gospels-quiz/", "id": "lindisfarne-gospels-quiz", "title": "Lindisfarne Gospels (quiz)", "description": "Test your knowledge", "slug": "lindisfarne-gospels-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/latin-western-europe/early-medieval/early-medieval-art/", "id": "early-medieval-art", "title": "Early Medieval art (quiz)", "description": "Test your knowledge!", "slug": "early-medieval-art", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In the fifth century C.E., people from tribes called Angles, Saxons and Jutes left their homelands in northern Europe to look for a new home. They knew that the Romans had recently left the green land of Britain unguarded, so they sailed across the channel in small wooden boats. The Britons did not give in without a fight, but after many years the invaders managed to overcome them and were to rule for over 500 years.", "node_slug": "early-medieval", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/latin-western-europe/early-medieval", "extended_slug": "humanities/medieval-world/latin-western-europe/early-medieval", "kind": "Topic", "slug": "early-medieval"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/", "id": "carolingian1", "hide": false, "title": "Carolingian", "child_data": [{"kind": "Video", "id": "x60cdbb94"}, {"kind": "Video", "id": "x5c43baef"}, {"kind": "Article", "id": "x2f7141f9"}, {"kind": "Video", "id": "xa1a749eb"}, {"kind": "Video", "id": "x26478043"}, {"kind": "Exercise", "id": "x94842601"}, {"kind": "Video", "id": "671563206"}, {"kind": "Exercise", "id": "xec1a9267"}], "children": [{"path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/charlemagne-an-introduction/", "id": "j4PI8dEWTGE", "title": "Charlemagne: An introduction (1 of 2)", "kind": "Video", "description": "Brief overview of Charlemagne and his coronation in 800.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "charlemagne-an-introduction"}, {"path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/charlemagne-and-the-carolingian-revival/", "id": "pyDPJENZOs0", "title": "Charlemagne and the Carolingian revival (2 of 2)", "kind": "Video", "description": "A brief introduction to Charlemagne's military campaigns and the cultural revival that he supported. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "charlemagne-and-the-carolingian-revival"}, {"path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/saint-matthew-from-the-ebbo-gospel/", "id": "eqC8gVxxB-s", "title": "Saint Matthew from the Ebbo Gospel", "kind": "Video", "description": "Saint Matthew, folio 18 verso of the Ebbo Gospels (Gospel Book of the Archbishop of Reims) from Hautvillers, France, c. 816-35, ink and tempera on vellum, 10 1/4 x 8 1/4 (Biblioth\u00e8que Municipale, \u00c9pernay) Speakers: Dr. Nancy Ross and Jennifer Freeman", "slug": "saint-matthew-from-the-ebbo-gospel"}, {"path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/lindau-gospels-cover/", "id": "u5vM4rtUSQg", "title": "Lindau Gospels cover", "kind": "Video", "description": "Jeweled upper cover of the Lindau Gospels, c. 880, Court School of Charles the Bald, 350 x 275 mm, cover may have been made in the Royal Abbey of St. Denis (Morgan Library and Museum, New York)\n\nSpeakers: Dr. Nancy Ross and Dr. Steven Zucker", "slug": "lindau-gospels-cover"}, {"path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/lindau-gospels-cover-quiz/", "id": "lindau-gospels-cover-quiz", "title": "Lindau Gospels Cover Quiz", "description": "Test your knowledge.", "slug": "lindau-gospels-cover-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/mosaics-santa-prassede-rome-early-9th-century/", "id": "6FL81EVJTUE", "title": "Santa Prassede (Praxedes)", "kind": "Video", "description": "Mosaics, Santa Prassede, Rome, early 9th century \n\nMosaics from the early 9th century, under Pope Paschal. The church is dedicated to Saint Praxedes and her sister Saint Pudentiana, daughters of Saint Pudens. The sisters were martyred because they provided Christian burials for martyrs, against Roman law. \n\nA Smarthistory video with Richard Bowen (courtesy of Context Travel, and Drs. Beth Harris and Steven Zucker)", "slug": "mosaics-santa-prassede-rome-early-9th-century"}, {"path": "khan/humanities/medieval-world/latin-western-europe/carolingian1/carolingian/", "id": "carolingian", "title": "Carolingian art", "description": "Test your knowledge.", "slug": "carolingian", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Charlemagne, King of the Franks and later Holy Roman Emperor, instigated a cultural revival known as the Carolingian Renaissance that continues to impact the way European languages are written, the structure of modern law and the very notion of Europe itself.", "node_slug": "carolingian1", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/latin-western-europe/carolingian1", "extended_slug": "humanities/medieval-world/latin-western-europe/carolingian1", "kind": "Topic", "slug": "carolingian1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/latin-western-europe/ottonian1/", "id": "ottonian1", "hide": false, "title": "Ottonian", "child_data": [{"kind": "Article", "id": "x4dff68de"}, {"kind": "Video", "id": "x425e42d1"}, {"kind": "Exercise", "id": "x357b3a63"}, {"kind": "Article", "id": "x5f060690"}, {"kind": "Article", "id": "x317255b6"}, {"kind": "Exercise", "id": "x19c8cd14"}], "children": [{"path": "khan/humanities/medieval-world/latin-western-europe/ottonian1/saint-michaels-hildesheim/", "id": "__pl88NO9Jw", "title": "Bronze doors, Saint Michael's, Hildesheim, commissioned by Bishop Bernward, 1015", "kind": "Video", "description": "Bronze doors, 1015, commissioned by Bishop Bernward for Saint Michael's, Hildesheim (Germany).\n\nA conversation with Dr. Nancy Ross and Jennifer Freeman.", "slug": "saint-michaels-hildesheim"}, {"path": "khan/humanities/medieval-world/latin-western-europe/ottonian1/hildesheim-doors-quiz/", "id": "hildesheim-doors-quiz", "title": "Hildesheim Doors (quiz)", "description": "Test your knowledge.", "slug": "hildesheim-doors-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/latin-western-europe/ottonian1/ottonian-art/", "id": "ottonian-art", "title": "Ottonian art (quiz)", "description": "Test your knowledge!", "slug": "ottonian-art", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Otto I (who became emperor in 962) lends his name to the \u201cOttonian\u201d period. He forged an important alliance with the Pope, which allowed him to be crowned the first official Holy Roman Emperor since 924.", "node_slug": "ottonian1", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/latin-western-europe/ottonian1", "extended_slug": "humanities/medieval-world/latin-western-europe/ottonian1", "kind": "Topic", "slug": "ottonian1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/", "id": "romanesque1", "hide": false, "title": "Romanesque", "child_data": [{"kind": "Article", "id": "x938a3af4"}, {"kind": "Article", "id": "xb3afa956"}, {"kind": "Article", "id": "x76cf0222"}, {"kind": "Article", "id": "xf5b8dfe1"}, {"kind": "Video", "id": "xd496ad30"}, {"kind": "Article", "id": "xfb599972"}, {"kind": "Article", "id": "x8b475e3a"}, {"kind": "Article", "id": "x7b5047d2"}, {"kind": "Article", "id": "x086bdd4e"}, {"kind": "Article", "id": "xa68e4089"}, {"kind": "Video", "id": "x9b729ccf"}, {"kind": "Video", "id": "1283572605"}, {"kind": "Article", "id": "x3271a39a"}, {"kind": "Video", "id": "785173745"}, {"kind": "Exercise", "id": "x8df1bfb5"}, {"kind": "Article", "id": "xfae26a36"}, {"kind": "Video", "id": "xe0420f8b"}, {"kind": "Article", "id": "x46ebf931"}, {"kind": "Video", "id": "x19cf0bb4"}, {"kind": "Article", "id": "x2d187534"}, {"kind": "Video", "id": "671422823"}, {"kind": "Video", "id": "671711105"}, {"kind": "Video", "id": "686563916"}, {"kind": "Exercise", "id": "x4410ddc2"}], "children": [{"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/modern-veneration/", "id": "VtSjcxdmboM", "title": "A look at modern veneration from the British Museum", "kind": "Video", "description": "An exploration of how veneration is still very much in evidence today -- and not always in expected places. Celebrity bodies, for instance, are revered in the global cultures of the 21st century, similar in many ways to the veneration of holy individuals in medieval Europe.", "slug": "modern-veneration"}, {"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/bayeux-tapestry/", "id": "F8OPQ_28mdo", "title": "The Bayeux Tapestry - Seven Ages of Britain - BBC One", "kind": "Video", "description": "The Bayeux Tapestry. The BBC's David Dimbleby describes the historical significance of the Bayeux Tapestry for his forthcoming BBC One Series, Seven Ages of Britain.", "slug": "bayeux-tapestry"}, {"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/the-animated-bayeux-tapestry/", "id": "LtGoBZ4D4_E", "title": "Bayeux Tapestry", "kind": "Video", "description": "Animation by David Newton, Sound Design by Marc Sylvan.\u00a0Copyright Potion Pictures Limited\n\nThe title \"Bayeux Tapestry\" (1066-82) is a bit of a misnomer\u2014the textile is embroidered wool on linen, and not actually a woven tapestry. The wool was dyed using the plants Woad, Madder, and Rocket. The linen canvas measures 20 inches in height by 230 feet\u00a0 in length (50 cm x 70 m), and supports the narrative embroidery that tells of the Norman invasion of England\u2014though very much from the Norman perspective.\n\nThe tapestry depicts Duke William of Normandy's conquest of Harold Godwinson\u2014England's new and ill-fated King. The conquest is portrayed as fully justified, and Harold is represented as an opportunist who broke his oaths to Edward the Confessor, former King of England, and to William himself. Although first known as William the \"Bastard\" (he was the illegitimate son of Robert the Magnificent and Herleva of Falaise), a name change accompanied his military success: he became known as William the \u201cConqueror.\" The Norman conquest is a key turning point in Western history, and the English language still reflects this dominance of French over Saxon culture.", "slug": "the-animated-bayeux-tapestry"}, {"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/tympanum-of-the-last-judgment-autun/", "id": "PATkTJhAUhM", "title": "Last Judgment Tympanum, Cathedral of St. Lazare, Autun", "kind": "Video", "description": "Last Judgment Tympanum, Central Portal on West facade of the Cathedral of St. Lazare, Autun, c. 1130-46", "slug": "tympanum-of-the-last-judgment-autun"}, {"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/last-judgment-tympanum-autun-quiz/", "id": "last-judgment-tympanum--autun--quiz", "title": "Last Judgment Tympanum (Autun) Quiz", "description": "Test your knowledge.", "slug": "last-judgment-tympanum-autun-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/pentecost-and-mission-to-the-apostles-tympanum-v-zelay/", "id": "Dnxm4UQPDTo", "title": "Pentecost and Mission to the Apostles Tympanum, V\u00e9zelay", "kind": "Video", "description": "Pentecost and Mission to the Apostles Tympanum, central portal of the narthex, Basilica Ste-Madeleine, V\u00e9zelay, France, 1120-32 Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "pentecost-and-mission-to-the-apostles-tympanum-v-zelay"}, {"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/cistercian-abbey-of-fontenay-unesconhk/", "id": "BBFUTbKx3qY", "title": "Cistercian Abbey of Fontenay (UNESCO/NHK)", "kind": "Video", "description": "This stark Burgundian monastery was founded by St Bernard in 1119. With its church, cloister, refectory, sleeping quarters, bakery and ironworks, it is an excellent illustration of the ideal of self-sufficiency as practised by the earliest communities of Cistercian monks. Source: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai URL", "slug": "cistercian-abbey-of-fontenay-unesconhk"}, {"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/capitals-church-of-sant-miquel-early-13th-century/", "id": "hPYOMKQlU1g", "title": "Historiated capitals, Church of Sant Miquel, Camarasa (Noguera)", "kind": "Video", "description": "Historiated capitals from the crossing of the Church of Sant Miquel of the castle of Camarasa (Noguera), early 13th century, stone, 77 x 1.65 x 77.5 cm (Museu Nacional d'Art de Catalunya, Palau Nacional, Barcelona).", "slug": "capitals-church-of-sant-miquel-early-13th-century"}, {"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/virgin-from-ger-second-half-of-the-12th-century/", "id": "KwYhMXjMlvc", "title": "Virgin from Ger", "kind": "Video", "description": "Virgin from Ger, second half of the 12th century, wood, tempera, and stucco,\n51.8 x 20.5 x 15.5 cm, From the parish church of Santa Coloma de Ger,\nBaixa Cerdanya (Museu Nacional d'Art de Cataunya Palau Nacional, Barcelona)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "virgin-from-ger-second-half-of-the-12th-century"}, {"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/the-wise-and-foolish-virgins-late-11th-century-early-12th-century/", "id": "ZXJMwIDx29Q", "title": "Wise and Foolish Virgins, Sant Quirze de Pedret", "kind": "Video", "description": "Circle of the Master of Pedret, The Wise and Foolish Virgins, south apse of the Epistle, Sant Quirze de Pedret, late 11th century to the beginning of 12th century, fresco transferred to canvas\n325 x 315 x 320 cm (Museu Nacional d'Art de Catalunya, Barcelona)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "the-wise-and-foolish-virgins-late-11th-century-early-12th-century"}, {"path": "khan/humanities/medieval-world/latin-western-europe/romanesque1/romanesque-art/", "id": "romanesque-art", "title": "Romanesque art (quiz)", "description": "Test your knowledge.", "slug": "romanesque-art", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Visogoths, Ostrogoths, and Vikings, oh my! Western Europe was not a peaceful place during the 600 years after the fall of the Roman Empire. Western Europe (what is now Italy, France, Spain, England, etc.) had been repeatedly invaded. The result was a fractured feudal society with little stability and less economic growth. It was only in the 11th century that everything began to change. Peace and prosperity allow for travel and for the widespread construction of large buildings. The faithful set out on pilgrimages in great numbers to visit holy relics in churches across Europe. This meant that ideas and styles also traveled, towns grew and churches were built and enlarged. These were, with rare exceptions, the first large structures to be built in the west since the fall of the Romans so many centuries before. We call the period Romanesque (Roman-like) because the masons of this period looked back to the architecture of ancient Rome.", "node_slug": "romanesque1", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/latin-western-europe/romanesque1", "extended_slug": "humanities/medieval-world/latin-western-europe/romanesque1", "kind": "Topic", "slug": "romanesque1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/latin-western-europe/gothic1/", "id": "gothic1", "hide": false, "title": "Gothic", "child_data": [{"kind": "Article", "id": "x820abf8b"}, {"kind": "Video", "id": "795750001"}, {"kind": "Exercise", "id": "xd25ccfe7"}, {"kind": "Article", "id": "xbce3cd76"}, {"kind": "Article", "id": "x7aadc46b"}, {"kind": "Video", "id": "671422824"}, {"kind": "Video", "id": "1159766199"}, {"kind": "Video", "id": "1159615005"}, {"kind": "Exercise", "id": "x9c742cef"}, {"kind": "Article", "id": "xecffad25"}, {"kind": "Article", "id": "x22a9cc97"}, {"kind": "Video", "id": "xb926d183"}, {"kind": "Exercise", "id": "x880f0fe0"}, {"kind": "Article", "id": "x2af4fa2e"}, {"kind": "Article", "id": "x87352589"}, {"kind": "Video", "id": "671397703"}, {"kind": "Exercise", "id": "x8983c2ad"}, {"kind": "Video", "id": "xc95c2474"}, {"kind": "Article", "id": "x774973ea"}, {"kind": "Exercise", "id": "xd9880c4c"}], "children": [{"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/birth-of-the-gothic-abbot-suger-and-the-ambulatory-in-the-basilica-of-st-denis-1140-44/", "id": "2EciWH-1ya4", "title": "Birth of the Gothic: Abbot Suger and the ambulatory at St. Denis", "kind": "Video", "description": "Ambulatory, Basilica of Saint Denis, Paris, 1140-44.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "birth-of-the-gothic-abbot-suger-and-the-ambulatory-in-the-basilica-of-st-denis-1140-44"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/st-denis-ambulatory-quiz/", "id": "st--denis-ambulatory-quiz", "title": "St. Denis Ambulatory (quiz)", "description": "Test your knowledge.", "slug": "st-denis-ambulatory-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/part-1-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220/", "id": "w8QRG-Xc6oU", "title": "Cathedral of Notre Dame de Chartres (part 1)", "kind": "Video", "description": "Part 1: Cathedral of Notre Dame de Chartres, c.1145 and 1194-c.1220 This video (1 of 3), focuses on the cathedral's pre-Gothic history, its sacred relic, and the westwerk's royal portal and jamb figures Speakers: Dr. Beth Harris and Dr. Steven Zucker For more: http://smarthistory.org/Gothic.html", "slug": "part-1-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/part-2-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220/", "id": "dN5XRW7T0cc", "title": "Cathedral of Notre Dame de Chartres (part 2)", "kind": "Video", "description": "Part 2: Cathedral of Notre Dame de Chartres, c.1145 and 1194-c.1220 This video (2 of 3), focuses on the cathedral's interior, its stained glass, nave, aisles, elevation, and choir Speakers: Dr. Beth Harris and Dr. Steven Zucker For more: http://smarthistory.org/Gothic.html", "slug": "part-2-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/part-3-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220/", "id": "vAtQB9wLkUA", "title": "Cathedral of Notre Dame de Chartres (part 3)", "kind": "Video", "description": "Part 3: Cathedral of Notre Dame de Chartres, c.1145 and 1194-c.1220\n\nThis video (3 of 3), focuses on the symbolism of light, the cathedral's flying buttresses, transept, the iconography of the north rose window, and the north porch and its sculptural program\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nFor more: http://smarthistory.org/Gothic.html", "slug": "part-3-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/cathedral-of-notre-dame-de-chartres-quiz/", "id": "cathedral-of-notre-dame-de-chartres-quiz", "title": "Cathedral of Notre Dame de Chartres (quiz)", "description": "Test your knowledge.", "slug": "cathedral-of-notre-dame-de-chartres-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/wilton-diptych/", "id": "Z2Zmmx0u-gE", "title": "Wilton Diptych", "kind": "Video", "description": "Unknown artist,\u00a0The Wilton Diptych, c. 1395-99, tempera on oak panel, 53 x 37 cm\u00a0\n(The National Gallery, London)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "wilton-diptych"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/wilton-diptych-quiz/", "id": "wilton-diptych-quiz", "title": "Wilton Diptych (quiz)", "description": "Test your knowledge.", "slug": "wilton-diptych-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/bonaventura-berlinghieri-altarpiece-of-st-francis-c-1235/", "id": "BPAsaeCbFZQ", "title": "Berlinghieri, St. Francis altarpiece", "kind": "Video", "description": "Bonaventura Berlinghieri, \u00a0St. Francis Altarpiece, 1235 (Church of San Francesco, Pescia, Italy). Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "bonaventura-berlinghieri-altarpiece-of-st-francis-c-1235"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/berlinghieri-s-st-francis-altarpiece-quiz/", "id": "berlinghieri-s-st--francis-altarpiece-quiz", "title": "Berlinghieri, St. Francis Altarpiece (quiz)", "description": "Test your knowledge.", "slug": "berlinghieri-s-st-francis-altarpiece-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/roettgen-pieta/", "id": "vsjl4aE2VkA", "title": "R\u00f6ttgen Piet\u00e0", "kind": "Video", "description": "R\u00f6ttgen Piet\u00e0, c. 1300-25, painted wood, 34 1/2 inches high (Rheinisches Landesmuseum, Bonn). \u00a0Speakers: Dr. Nancy Ross and Dr. Beth Harris", "slug": "roettgen-pieta"}, {"path": "khan/humanities/medieval-world/latin-western-europe/gothic1/gothic-art/", "id": "gothic-art", "title": "Gothic art (quiz)", "description": "Test your knowledge.", "slug": "gothic-art", "kind": "Exercise"}], "in_knowledge_map": false, "description": "No, we\u2019re not talking about the dark subculture we know as Goth! We\u2019re talking about the style of art and architecture In Europe from the 1100s to the beginnings of the Renaissance at about 1400. Hopefully by the end of this tutorial when someone says Gothic, you\u2019ll think of enormous stained-glass windows in churches whose vaulted ceilings reach toward heaven and not black clothing and dark eyeliner!", "node_slug": "gothic1", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/latin-western-europe/gothic1", "extended_slug": "humanities/medieval-world/latin-western-europe/gothic1", "kind": "Topic", "slug": "gothic1"}], "in_knowledge_map": false, "description": "Learn about the Anglo-Saxons, Charlemagne, the crusades, and dazzling stained glass in soaring Gothic cathedrals.", "node_slug": "latin-western-europe", "render_type": "Topic", "topic_page_url": "/humanities/medieval-world/latin-western-europe", "extended_slug": "humanities/medieval-world/latin-western-europe", "kind": "Topic", "slug": "latin-western-europe"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/medieval-world/late-gothic-italy/", "id": "late-gothic-italy", "hide": false, "title": "Late Gothic art in Italy", "child_data": [{"kind": "Topic", "id": "xac0d48e8"}, {"kind": "Topic", "id": "x06b83994"}, {"kind": "Topic", "id": "x9b23052c"}, {"kind": "Topic", "id": "x9bd71cc5"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/medieval-world/late-gothic-italy/beginners-guide-late-gothic/", "id": "beginners-guide-late-gothic", "hide": false, "title": "A beginner's guide to the Late Gothic", "child_data": [{"kind": "Article", "id": "xfbca348c"}, {"kind": "Article", "id": "xce9189a3"}, {"kind": "Video", "id": "x88eba800"}], "children": [{"path": "khan/humanities/medieval-world/late-gothic-italy/beginners-guide-late-gothic/gold-ground-panel-painting/", "id": "WVyusmjiTXI", "title": "Gold-ground panel painting", "kind": "Video", "description": "Wood panel was the support most often used for painting before canvas replaced it at the end of the 1500s. Artists applied gold ground and expensive pigments to the most splendid panel paintings. Love art? Follow us on Google+", "slug": "gold-ground-panel-painting"}], "in_knowledge_map": false, "description": "Italian art from the late 13th and 14th centuries was once known as primitive because it was seen largely as a transition from Medieval abstraction to the naturalism of the Renaissance (with a dose of Byzantine influence thrown in for good measure). Despite the Black Death, we now study the brilliant artist's of Florence and Siena in their own right.", "node_slug": "beginners-guide-late-gothic", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/late-gothic-italy/beginners-guide-late-gothic", "extended_slug": "humanities/medieval-world/late-gothic-italy/beginners-guide-late-gothic", "kind": "Topic", "slug": "beginners-guide-late-gothic"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/", "id": "florence-late-gothic", "hide": false, "title": "Florence, the Late Gothic", "child_data": [{"kind": "Article", "id": "xb800485d"}, {"kind": "Article", "id": "x122da3a4"}, {"kind": "Video", "id": "671422826"}, {"kind": "Video", "id": "671632337"}, {"kind": "Exercise", "id": "x5f63331b"}, {"kind": "Video", "id": "xe35118f4"}, {"kind": "Video", "id": "671686556"}, {"kind": "Article", "id": "x546de4de"}, {"kind": "Video", "id": "x03bfdd48"}, {"kind": "Video", "id": "x39fc0169"}, {"kind": "Video", "id": "x625f0c99"}, {"kind": "Video", "id": "xde3729f5"}, {"kind": "Exercise", "id": "xe99af329"}, {"kind": "Video", "id": "708126669"}, {"kind": "Video", "id": "671707162"}, {"kind": "Exercise", "id": "x2bef76c2"}], "children": [{"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/cimabue-maesta-of-santa-trinita-1280-900-1290/", "id": "_alU-o_qDt8", "title": "Cimabue, Santa Trinita Madonna", "kind": "Video", "description": "Cimabue, Maesta of Santa Trinita, 1280-1290, tempera on panel, 151 1/2 x 87 3/4\" (385 x 223 cm), Uffizi, Florence Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "cimabue-maesta-of-santa-trinita-1280-900-1290"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/giotto-the-ognissanti-madonna-1306-10/", "id": "P9s3YA-glNk", "title": "Giotto, The Ognissanti Madonna", "kind": "Video", "description": "Giotto, The Ognissanti Madonna, 1306-10, tempera on panel, 128 x 80 1/4\" (325 x 204 cm). Painted for the Church of Ognissanti, Florence Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "giotto-the-ognissanti-madonna-1306-10"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/giotto-s-ognissanti-madonna-quiz/", "id": "giotto-s-ognissanti-madonna-quiz", "title": "Giotto, Ognissanti Madonna (quiz)", "description": "Test your knowledge.", "slug": "giotto-s-ognissanti-madonna-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/cimabue-s-santa-trinita-madonna-giotto-s-ognissanti-madonna/", "id": "DKnFvXmUlOI", "title": "Cimabue, Santa Trinita Madonna & Giotto's Ognissanti Madonna", "kind": "Video", "slug": "cimabue-s-santa-trinita-madonna-giotto-s-ognissanti-madonna"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/giotto-st-francis-receiving-the-stigmata-c-1295-1300/", "id": "MQct5EFQ9x8", "title": "Giotto, St. Francis Receiving the Stigmata", "kind": "Video", "description": "Giotto di Bondone, St. Francis of Assisi Receiving the Stigmata with predella scenes of the Dream of Innocent III, The Pope Approving the Rule of the Order, and St. Francis Preaching to the Birds, c. 1295-1300 (originally, Church of San Francesco, Pisa), tempera and gold on panel, 3.13 x 1.63 m, original frame inscribed: \"OPUS IOCTI FIORETINI. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "giotto-st-francis-receiving-the-stigmata-c-1295-1300"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/giotto-arena-scrovegni-chapel-padua-c-1305-part-1-of-4/", "id": "47QgqdeSi0U", "title": "Giotto, Arena (Scrovegni) Chapel (part 1)", "kind": "Video", "description": "Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305, Part 1\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "giotto-arena-scrovegni-chapel-padua-c-1305-part-1-of-4"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/giotto-arena-scrovegni-chapel-part-2-of-4/", "id": "I356lV1v8Bc", "title": "Giotto, Arena (Scrovegni) Chapel (part 2)", "kind": "Video", "description": "Part 2: The Narrative Cycle from Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "giotto-arena-scrovegni-chapel-part-2-of-4"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/giotto-arena-scrovegni-chapel-part-3-of-4/", "id": "RbBQN0Wt_wY", "title": "Giotto, Arena (Scrovegni) Chapel (part 3)", "kind": "Video", "description": "Part 3: The Lamentation from Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "giotto-arena-scrovegni-chapel-part-3-of-4"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/giotto-arena-scrovegni-chapel-part-4-of-4/", "id": "6z_Kjsn8VLI", "title": "Giotto, Arena (Scrovegni) Chapel (part 4)", "kind": "Video", "description": "Part 4: The Last Judgment from Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "giotto-arena-scrovegni-chapel-part-4-of-4"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/arena-chapel-quiz/", "id": "arena-chapel-quiz", "title": "Giotto, Arena Chapel (quiz)", "description": "Test your knowledge.", "slug": "arena-chapel-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/giotto-the-entombment-of-mary-1310/", "id": "be9rz_HOnXI", "title": "Giotto, The Entombment of Mary", "kind": "Video", "description": "Giotto, The Entombment of Mary, 1310, tempera on poplar, 75 x 179 cm (Gem\u00e4ldegalerie, Kaiser Friedrich-Museums-Verein, Berlin)", "slug": "giotto-the-entombment-of-mary-1310"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/andrea-pisano-reliefs-for-the-florence-campanile-c-1336/", "id": "ncgAfzRSJrI", "title": "Andrea Pisano's reliefs on the Campanile in Florence", "kind": "Video", "description": "Andrea Pisano, Reliefs for the Campanile in Florence, c. 1336\n\n\nSpeakers: David Drogin and Beth Harris", "slug": "andrea-pisano-reliefs-for-the-florence-campanile-c-1336"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/florence-late-gothic/florence-in-the-1300s/", "id": "florence-in-the-1300s", "title": "Florence in the 1300s (quiz)", "description": "Test your knowledge.", "slug": "florence-in-the-1300s", "kind": "Exercise"}], "in_knowledge_map": false, "description": "When Vasari wrote his enormously influential book, Lives of the Artists, in the 16th century, he credited Giotto, the 14th century Florentine artist with beginning \"the great art of painting as we know it today, introducing the technique of drawing accurately from life, which had been neglected for more than two hundred years.\" For Vasari, Giotto was the first artist to leave behind the medieval practice of painting what one knows and believes, for what one sees. This tutorial looks at painting and sculpture in Florence to highlight some of the most influential art of the 14th century.", "node_slug": "florence-late-gothic", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/late-gothic-italy/florence-late-gothic", "extended_slug": "humanities/medieval-world/late-gothic-italy/florence-late-gothic", "kind": "Topic", "slug": "florence-late-gothic"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/", "id": "siena-late-gothic", "hide": false, "title": "Siena, the Late Gothic", "child_data": [{"kind": "Article", "id": "xb5df7436"}, {"kind": "Video", "id": "952862569"}, {"kind": "Video", "id": "952728915"}, {"kind": "Exercise", "id": "x854e8007"}, {"kind": "Video", "id": "575708250"}, {"kind": "Exercise", "id": "xd6532eeb"}, {"kind": "Video", "id": "671702322"}, {"kind": "Video", "id": "1261328967"}, {"kind": "Exercise", "id": "x9ea93601"}, {"kind": "Video", "id": "719804656"}, {"kind": "Video", "id": "xcb22ac20"}, {"kind": "Video", "id": "671702323"}, {"kind": "Exercise", "id": "x95d280b3"}, {"kind": "Exercise", "id": "xde56ea50"}], "children": [{"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/duccio-maesta-front-1308-11/", "id": "2fijnNzktDI", "title": "Duccio, Maesta (front)", "kind": "Video", "description": "Duccio, Maesta (front), 1308-11 (Museo dell'Opera Metropolitana del Duomo, Siena) Speakers: Dr. Beth Harris and Dr. Steven Zucker.\n\nDuring this period, and for hundreds of years, Italy was not a unified country, but rather was divided into many small countries we call city-states.\u00a0Florence, Siena, Milan, Venice\u2014these were essentially independent nations with their own governments\u2014and they were at war with each other.\u00a0These city-states also had independent cultures with their own distinct styles in painting and sculpture. Siena had a unique style that emphasized decorative surfaces, sinuous lines, elongated figures and the heavy use of gold.\u00a0Duccio was the founder of the Sienese style and his work was quite different from the Florentine painter Giotto. Giotto emphasized a greater naturalism\u2014creating figures who are more monumental (large, heavy and with a greater sense of accurate proportion) and a greater illusion of three-dimensional space.\u00a0\n\nContemporaneous description of the procession that brought this painting to Siena Cathedral (or Duomo):\n\nAt this time the altarpiece for the high altar was finished and the picture which was called the \"Madonna with the large eyes\" or Our Lady of Grace, that now hangs over the altar of St. Boniface, was taken down. Now this Our Lady was she who had hearkened to the people of Siena when the Florentines were routed at Monte Aperto, and her place was changed because the new one was made, which is far more beautiful and devout and larger, and is painted on the back with the stories of the Old and New Testaments. And on the day that it was carried to the Duomo the shops were shut, and the bishop conducted a great and devout company of priests and friars in solemn procession, accompanied by the nine signiors, and all the officers of the commune, and all the people, and one after another the worthiest with lighted candles in their hands took places near the picture, and behind came the women and children with great devotion. And they accompanied the said picture up to the Duomo, making the procession around the Campo, as is the custom, all the bells ringing joyously, out of reverence for so noble a picture as this. And this picture Duccio di Niccol\u00f2 the painter made, and it was made in the house of the Muciatti outside the gate aStalloreggi. And all that day persons, praying God and His Mother, who is our advocate, to defend us by their infinite mercy from every adversity and all evil, and keep us from the hands of traitors and of the enemies of Siena. (English translation: Charles Eliot Norton,\u00a0Historical Studies of Church-Buildings in the Middle Ages: Venice, Siena, Florence\u00a0(New York: Harper & Brothers, 1880), 144-45;\u00a0Italian text:\u00a0G. Milanesi,\u00a0Documenti per la storia dell'arte senese\u00a0(Siena: 1854, I), 169)", "slug": "duccio-maesta-front-1308-11"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/duccio-maesta-back-1308-11/", "id": "w6Tgu14VSLY", "title": "Duccio, Maesta (back)", "kind": "Video", "description": "Duccio, Maesta (back), 1308-11 (Museo dell'Opera Metropolitana del Duomo, Siena) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "duccio-maesta-back-1308-11"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/duccio-s-maesta-quiz/", "id": "duccio-s-maesta-quiz", "title": "Duccio, Maesta (quiz)", "description": "Test your knowledge.", "slug": "duccio-s-maesta-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/duccio-the-rucellai-madonna-1285-86/", "id": "1JL5ZR-ocOs", "title": "Duccio, The Rucellai Madonna", "kind": "Video", "description": "Duccio, The Rucellai Madonna, 1285-86, tempera on panel, 177 x 114\" or 450 x 290 cm (Uffizi, Florence) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "duccio-the-rucellai-madonna-1285-86"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/duccio-s-rucellai-madonna-quiz/", "id": "duccio-s-rucellai-madonna-quiz", "title": "Duccio, Rucellai Madonna (quiz)", "description": "Test your knowledge.", "slug": "duccio-s-rucellai-madonna-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/duccio-the-virgin-and-child-c-1315/", "id": "Pu1WCHsYfKQ", "title": "Duccio, The Virgin and Child with Saints Dominic and Aurea", "kind": "Video", "description": "Duccio di Buoninsegna, The Virgin and Child with Saints Dominic and Aurea, c. 1315, tempera on wood, 42.5 x 34.5 cm (National Gallery, London). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "duccio-the-virgin-and-child-c-1315"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/ambrogio-lorenzetti-s-palazzo-pubblico-frescos-allegory-and-effect-of-good-and-bad-government/", "id": "jk3wNadYA7k", "title": "Ambrogio Lorenzetti, Palazzo Pubblico frescos: Allegory and effect of good and bad government", "kind": "Video", "description": "Ambrogio Lorenzetti, Allegory of Good Government, Effects of Good Government in the City and the Country, and Allegory and Effects of Bad Government in the City and the Country, Siena c. 1337-40, fresco, Sala della Pace (Hall of Peace) also know as the Sala dei Nove (the Hall of the Nine), 7.7 x 14.4 meters (room), Palazzo Pubblico, Siena\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nFor more information visit: http://smarthistory.khanacademy.org/the-allegories-and-effects-of-good-and-bad-government.html", "slug": "ambrogio-lorenzetti-s-palazzo-pubblico-frescos-allegory-and-effect-of-good-and-bad-government"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/allegory-and-effect-of-good-and-bad-government-quiz/", "id": "allegory-and-effect-of-good-and-bad-government-quiz", "title": "Lorenzetti, Allegory and Effect of Good and Bad Government (quiz)", "description": "Test your knowledge.", "slug": "allegory-and-effect-of-good-and-bad-government-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/ambrogio-lorenzetti-presentation-of-jesus-in-the-temple-1342/", "id": "_lzdhIHLwcQ", "title": "Lorenzetti, Presentation of Jesus in the Temple", "kind": "Video", "description": "Ambrogio Lorenzetti, Presentation of Jesus in the Temple, 1342, tempera on panel, 257 x 168 cm (Galleria degli Uffizi, Florence)", "slug": "ambrogio-lorenzetti-presentation-of-jesus-in-the-temple-1342"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/pietro-lorenzetti-birth-of-the-virgin-c-1342/", "id": "Z29bpAW1AUM", "title": "Pietro Lorenzetti, Birth of the Virgin", "kind": "Video", "description": "Pietro Lorenzetti, Birth of the Virgin, c. 1342, tempera on panel, 6 feet, 1 inch x 5 feet, 11 inches, for the altar of St. Savinus, Siena Cathedral (now in Museo dell'Opera del Duomo, Siena) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "pietro-lorenzetti-birth-of-the-virgin-c-1342"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/martini-annunciation-1333/", "id": "7PsgPJoGWig", "title": "Simone Martini, Annunciation", "kind": "Video", "description": "Simone Martini, Annunciation, 1333, tempera on panel, 72 1/2 x 82 5/8\" or 184 x 210 cm. (Uffizi, Florence) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "martini-annunciation-1333"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/simone-martini-s-annunciation-quiz/", "id": "simone-martini-s-annunciation-quiz", "title": "Simone Martini's Annunciation (quiz)", "description": "Test your knowledge.", "slug": "simone-martini-s-annunciation-quiz", "kind": "Exercise"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/siena-late-gothic/siena-in-the-1300s/", "id": "siena-in-the-1300s", "title": "Siena in the 1300s", "description": "Test your knowledge!", "slug": "siena-in-the-1300s", "kind": "Exercise"}], "in_knowledge_map": false, "description": "When we think of the Renaissance, we tend to think of Florence (and Rome). But the city of Siena also deserves our attention. Today, the lovely walled city of Siena is one of the best preserved Medieval cities in Europe and it was chosen by the United Nations as a World Heritage Site. In the 14th century, Siena was a wealthy independent nation and often at war with its neighbor, Florence. Some of the most important art of the 14th century was commissioned for Siena\u2019s Cathedral and town hall. Duccio and his students, the Lorenzetti brothers and Simone Martini produced large-scale painting with an intricacy and subtle coloration that is unique in the Renaissance.", "node_slug": "siena-late-gothic", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/late-gothic-italy/siena-late-gothic", "extended_slug": "humanities/medieval-world/late-gothic-italy/siena-late-gothic", "kind": "Topic", "slug": "siena-late-gothic"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/medieval-world/late-gothic-italy/pisa-rome/", "id": "pisa-rome", "hide": false, "title": "Pisa and Rome, the Late Gothic", "child_data": [{"kind": "Video", "id": "671632335"}, {"kind": "Video", "id": "xea87afd3"}], "children": [{"path": "khan/humanities/medieval-world/late-gothic-italy/pisa-rome/nicola-and-giovanni-pisano-1260-1301/", "id": "DXEG8l1FRRk", "title": "Nicola, Pulpit, Pisa Baptistery; and Giovanni Pisano, Slaughter of the Innocents, Pulpit, Sant'Andrea church, Pistoia", "kind": "Video", "description": "Nicola Pisano, Pulpit, Pisa Baptistery, 1260 Giovanni Pisano, Slaughter of the Innocents, Marble, 1301, Pulpit, Sant'Andrea church, Pistoia Speakers: Dr. David Drogin, Dr. Beth Harris", "slug": "nicola-and-giovanni-pisano-1260-1301"}, {"path": "khan/humanities/medieval-world/late-gothic-italy/pisa-rome/pietro-cavallini-the-last-judgement/", "id": "pwHzN9aV1WY", "title": "Pietro Cavallini, The Last Judgment", "kind": "Video", "description": "Pietro Cavallini, The Last Judgment, c.1293, fresco, Santa Cecilia, Rome This fresco was discovered in 1900 and represents one of the few works by Cavallini to survive.", "slug": "pietro-cavallini-the-last-judgement"}], "in_knowledge_map": false, "description": "", "node_slug": "pisa-rome", "render_type": "Tutorial", "topic_page_url": "/humanities/medieval-world/late-gothic-italy/pisa-rome", "extended_slug": "humanities/medieval-world/late-gothic-italy/pisa-rome", "kind": "Topic", "slug": "pisa-rome"}], "in_knowledge_map": false, "description": "The art of Giotto and Duccio was once known as primitive, and useful only as a prelude to the Renaissance. However, recent scholarship allows us to study the brilliant artist's of Florence and Siena in their own right.", "node_slug": "late-gothic-italy", "render_type": "Topic", "topic_page_url": "/humanities/medieval-world/late-gothic-italy", "extended_slug": "humanities/medieval-world/late-gothic-italy", "kind": "Topic", "slug": "late-gothic-italy"}], "in_knowledge_map": false, "description": "400-1400: Catacombs, cathedrals, Giotto, and more.", "node_slug": "medieval-world", "render_type": "Subject", "topic_page_url": "/humanities/medieval-world", "extended_slug": "humanities/medieval-world", "kind": "Topic", "slug": "medieval-world"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-islam/", "id": "art-islam", "hide": false, "title": "Art of the Islamic world", "child_data": [{"kind": "Topic", "id": "x1bb7590d"}, {"kind": "Topic", "id": "xee0c2ae8"}, {"kind": "Topic", "id": "x680acc84"}, {"kind": "Topic", "id": "xfa2d5fe7"}, {"kind": "Topic", "id": "x14edcb99"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-islam/beginners-guide-islamic/", "id": "beginners-guide-islamic", "hide": false, "title": "A beginner's guide to the art of Islam", "child_data": [{"kind": "Article", "id": "xb77dee43"}, {"kind": "Article", "id": "x7f25971c"}, {"kind": "Article", "id": "x6515a5af"}, {"kind": "Video", "id": "xaf6ef088"}, {"kind": "Article", "id": "x6fd21700"}, {"kind": "Article", "id": "x7d7fd450"}, {"kind": "Article", "id": "xb914513a"}, {"kind": "Article", "id": "x9056efc9"}], "children": [{"path": "khan/humanities/art-islam/beginners-guide-islamic/modern-pilgrimage-stories/", "id": "r5l5Cwge7yk", "title": "Stories of the modern pilgrimage", "kind": "Video", "description": "Every year, 25,000 British Muslims make the pilgrimage to Mecca. As part of the exhibition, Hajj: journey to the heart of Islam, the British Museum asked what this journey is like... \u00a9Trustees of the British Museum. More Hajj stories from the Asian Art Museum", "slug": "modern-pilgrimage-stories"}], "in_knowledge_map": false, "description": "The Taj Mahal, a silk carpet, a Qur\u2018an; all of these are examples of Islamic art. But what exactly is Islamic art and architecture?", "node_slug": "beginners-guide-islamic", "render_type": "Tutorial", "topic_page_url": "/humanities/art-islam/beginners-guide-islamic", "extended_slug": "humanities/art-islam/beginners-guide-islamic", "kind": "Topic", "slug": "beginners-guide-islamic"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-islam/islamic-art-early/", "id": "islamic-art-early", "hide": false, "title": "Early period", "child_data": [{"kind": "Article", "id": "x884ddc6f"}, {"kind": "Article", "id": "x93af2435"}, {"kind": "Exercise", "id": "xbf552746"}, {"kind": "Article", "id": "x4c1fae04"}, {"kind": "Exercise", "id": "x5f773be3"}, {"kind": "Article", "id": "xc0065d98"}, {"kind": "Video", "id": "x319c7cea"}], "children": [{"path": "khan/humanities/art-islam/islamic-art-early/dome-of-the-rock-quiz/", "id": "dome-of-the-rock-quiz", "title": "Dome of the Rock Quiz", "description": "This quiz is for the essay Early period: The Dome of the Rock (Qubbat al-Sakhra).", "slug": "dome-of-the-rock-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-islam/islamic-art-early/great-mosque-of-cordoba-quiz/", "id": "great-mosque-of-cordoba-quiz", "title": "Great Mosque of Cordoba Quiz", "description": "This quiz is for the essay Early period: The Great Mosque of Cordoba.", "slug": "great-mosque-of-cordoba-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-islam/islamic-art-early/kairouan-unesco/", "id": "kuTKfmgzGYI", "title": "Kairouan (from UNESCO)", "kind": "Video", "description": "Founded in 670, Kairouan flourished under the Aghlabid dynasty in the 9th century. Despite the transfer of the political capital to Tunis in the 12th century, Kairouan remained the Maghreb's principal holy city. Its rich architectural heritage includes the Great Mosque, with its marble and porphyry columns, and the 9th-century Mosque of the Three Gates.\nSource: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai (URL)", "slug": "kairouan-unesco"}], "in_knowledge_map": false, "description": "Early Period (c. 640-900 C.E.)\nFrom the rightfully guided caliphs who succeeded Muhammad, through the Umayyads' Dome of the Rock and Great Mosque of Damascus, to the decline of Abbasids rule.", "node_slug": "islamic-art-early", "render_type": "Tutorial", "topic_page_url": "/humanities/art-islam/islamic-art-early", "extended_slug": "humanities/art-islam/islamic-art-early", "kind": "Topic", "slug": "islamic-art-early"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-islam/islamic-art-medieval/", "id": "islamic-art-medieval", "hide": false, "title": "Medieval period", "child_data": [{"kind": "Article", "id": "xff07fa3c"}, {"kind": "Article", "id": "x34d6af78"}, {"kind": "Exercise", "id": "x5cd80a1d"}, {"kind": "Article", "id": "xb8e8fe69"}, {"kind": "Article", "id": "x32fdad41"}, {"kind": "Exercise", "id": "x383f510e"}, {"kind": "Article", "id": "x56ecd70b"}, {"kind": "Video", "id": "873031521"}, {"kind": "Video", "id": "824564443"}, {"kind": "Article", "id": "xd21e8f03"}, {"kind": "Exercise", "id": "xa4035421"}, {"kind": "Video", "id": "x53070816"}, {"kind": "Video", "id": "916778089"}, {"kind": "Article", "id": "xec2aef97"}, {"kind": "Article", "id": "x260c80c3"}], "children": [{"path": "khan/humanities/art-islam/islamic-art-medieval/the-great-mosque-of-isfahan-quiz/", "id": "the-great-mosque-of-isfahan-quiz", "title": "The Great Mosque of Isfahan (quiz)", "description": "Test your knowledge", "slug": "the-great-mosque-of-isfahan-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-islam/islamic-art-medieval/pyxis-of-al-mughira-quiz/", "id": "pyxis-of-al-mughira-quiz", "title": "Pyxis of al-Mughira (quiz)", "description": "Test your knowledge.", "slug": "pyxis-of-al-mughira-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-islam/islamic-art-medieval/royal-figures-iran-saljuq-period/", "id": "4S9Bqo_LX7k", "title": "Two royal figures (Saljuq Period)", "kind": "Video", "description": "A conversation between Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker in front of \"Two Royal Figures,\" Iran (Saljuq period), mid 11th - mid 12th c., painted and gilded stucco (Metropolitan Museum of Art).", "slug": "royal-figures-iran-saljuq-period"}, {"path": "khan/humanities/art-islam/islamic-art-medieval/coronation-mantle-new/", "id": "JOkEfbaaK-o", "title": "Coronation mantle", "kind": "Video", "description": "Coronation Mantle, 1133/34, fabric from Byzantium or Thebes, samite, silk, gold, pearls, filigree, sapphires, garnets, glass, and cloisonn\u00e9 enamel, 146 x 345 cm (Neue Hofburg, Vienna).\u00a0Likely made for the Norman ruler Roger II in 1133/34 in the royal workshop in Palermo of fabric from Byzantium or Thebes, Samite, silk, gold, pearls, filigree, sapphires, garnets, glass, and cloisonn\u00e9 enamel. The Kufic script reads: \"This mantle was worked in the most magnificent clothing workshop and is connected with the desire and hopes, felicitous days and nights without cease or change, with authority, with honor and felicity, assurances of trust, reverent care, protection, good destiny, freedom from harm, triumph and livelihood in the capital city of Sicily in the year 528\" (or 1133/34 in the Gregorian calendar). Neue Hofburg, Vienna. \u00a0Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "coronation-mantle-new"}, {"path": "khan/humanities/art-islam/islamic-art-medieval/the-alhambra-quiz/", "id": "the-alhambra-quiz", "title": "The Alhambra (quiz)", "description": "Test your knowledge.", "slug": "the-alhambra-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-islam/islamic-art-medieval/ibn-al-zain-basin/", "id": "2IT6FcvBp_w", "title": "Basin (Baptist\u00e8re de Saint Louis)", "kind": "Video", "description": "Mohammed ibn al-Zain, Basin (Baptist\u00e8re de Saint Louis), c. 1320-40, brass inlaid with silver and gold, 22.2 x 50.2 cm, Egypt or Syria (Mus\u00e9e du Louvre, Paris)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "ibn-al-zain-basin"}, {"path": "khan/humanities/art-islam/islamic-art-medieval/ilkhanid-mihrab-1354-55-isfahan-iran-metropolitan-museum-of-art-new-york/", "id": "hXNFjOhrihI", "title": "Ilkhanid Mihrab", "kind": "Video", "description": "Mihrab (prayer niche), 1354--55 (A.H. 755), just after the Ilkhanid period, Isfahan, Iran, polychrome glazed tiles, 135-1/16 x 113-11/16 inches / 343.1 x 288.7 cm (Metropolitan Museum of Art, New York). Speakers: Dr. Elizabeth Macaulay Lewis and Dr. Steven Zucker", "slug": "ilkhanid-mihrab-1354-55-isfahan-iran-metropolitan-museum-of-art-new-york"}], "in_knowledge_map": false, "description": "Medieval Period (c. 900-1517 C.E.)\nThe Fatimids (909-1171) ruled north Africa, and parts of Syria and the Seljuqs contolled eastern Islamic lands and eventually Iran, Iraq and much of Anatolia.", "node_slug": "islamic-art-medieval", "render_type": "Tutorial", "topic_page_url": "/humanities/art-islam/islamic-art-medieval", "extended_slug": "humanities/art-islam/islamic-art-medieval", "kind": "Topic", "slug": "islamic-art-medieval"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-islam/islamic-art-late-period/", "id": "islamic-art-late-period", "hide": false, "title": "Late period", "child_data": [{"kind": "Article", "id": "x7313775f"}, {"kind": "Video", "id": "xa8c8ced4"}, {"kind": "Video", "id": "x8f895fbe"}, {"kind": "Video", "id": "x00afaad3"}, {"kind": "Article", "id": "x27124904"}, {"kind": "Video", "id": "xb61a6043"}, {"kind": "Article", "id": "xabe3dc16"}, {"kind": "Article", "id": "x46650bea"}, {"kind": "Article", "id": "x4c5ce64d"}, {"kind": "Exercise", "id": "x0c7f1bcf"}, {"kind": "Article", "id": "xfd8aec8d"}, {"kind": "Article", "id": "x6bca903f"}, {"kind": "Article", "id": "x38b4da62"}, {"kind": "Article", "id": "x13fa1b60"}, {"kind": "Article", "id": "xd50992bb"}, {"kind": "Article", "id": "xaaf9431a"}, {"kind": "Video", "id": "x0358e330"}, {"kind": "Video", "id": "x6e5bc2a4"}, {"kind": "Video", "id": "x4f1614d0"}, {"kind": "Article", "id": "xf39cf939"}, {"kind": "Video", "id": "1272001346"}, {"kind": "Video", "id": "xce7e4efe"}, {"kind": "Article", "id": "x3ed6d92d"}], "children": [{"path": "khan/humanities/art-islam/islamic-art-late-period/hagia-sophia-mosque/", "id": "r6383ZDXB0Q", "title": "Hagia Sophia as a mosque", "kind": "Video", "description": "This video focuses on Hagia Sophia after the conquest of Constantinople by the Ottomans in 1453.\u00a0Speakers: Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker", "slug": "hagia-sophia-mosque"}, {"path": "khan/humanities/art-islam/islamic-art-late-period/sinan-sleymaniye-mosque/", "id": "Q48ddBmCjQA", "title": "Sinan, S\u00fcleymaniye Mosque", "kind": "Video", "description": "Sinan, S\u00fcleymaniye Mosque, Istanbul, completed 1558\nSpeakers: Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker", "slug": "sinan-sleymaniye-mosque"}, {"path": "khan/humanities/art-islam/islamic-art-late-period/getting-lost/", "id": "Anab9vKI7i8", "title": "Tughra (Official Signature) of Sultan S\u00fcleiman the Magnificent from Istanbul", "kind": "Video", "description": "Met curator Deniz Beyazit on the art of control in Tughra (Official Signature) of Sultan S\u00fcleiman the Magnificent from Istanbul, c. 1555\u201360.\n\nRaised to a high art form within the Ottoman chancery, the tughra served as the official seal of the sultan. Affixed to every royal edict, this stylized signature is an intricate calligraphic composition comprising the name of the reigning sultan, his father\u2019s name, his title, and the phrase \"the eternally victorious.\" Its bold, gestural line contrasts with the delicate swirling vine-scroll illumination used to ornament the seal.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit Find an Educator Resource.", "slug": "getting-lost"}, {"path": "khan/humanities/art-islam/islamic-art-late-period/rustem-pasha/", "id": "v8WMx_TmEyQ", "title": "Sinan, R\u00fcstem Pasha Mosque", "kind": "Video", "description": "Mimar Sinan, R\u00fcstem Pasha Mosque, Istanbul, 1561-63.\u00a0Speakers: Dr. Elizabeth Macaulay-Lewis and Dr. Beth Harris", "slug": "rustem-pasha"}, {"path": "khan/humanities/art-islam/islamic-art-late-period/ardabil-carpet-quiz/", "id": "ardabil-carpet-quiz", "title": "Ardabil Carpet (quiz)", "description": "Test your knowledge.", "slug": "ardabil-carpet-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-islam/islamic-art-late-period/coins-faith-power/", "id": "jWFcI44eRN8", "title": "Coins of faith and power at the British Museum", "kind": "Video", "description": "Vesta Sarkhosh Curtis, British Museum curator of Islamic and Iranian coins, talks through the messaging on some Persian coins. \u00a9 Trustees of the British Museum", "slug": "coins-faith-power"}, {"path": "khan/humanities/art-islam/islamic-art-late-period/english-ambassador/", "id": "cVXfChxmAlQ", "title": "An English ambassador", "kind": "Video", "description": "Christopher de Bellaigue, writer, describes the portraits of Sir Robert Sherley and his wife in the exhibition Shah Abbas, the remaking of Iran.\u00a0\u00a9 Trustees of the British Museum", "slug": "english-ambassador"}, {"path": "khan/humanities/art-islam/islamic-art-late-period/two-portraits/", "id": "5YEGpb7tXOo", "title": "Two portraits, two views", "kind": "Video", "description": "Sheila Canby, curator of the exhibition Shah Abbas the remaking of Iran, discusses two very different portraits of Shah 'Abbas giving an insight into his character.\u00a0\u00a9 Trustees of the British Museum", "slug": "two-portraits"}, {"path": "khan/humanities/art-islam/islamic-art-late-period/damascus-room/", "id": "n9C7sMb7MmI", "title": "Qa'a: The Damascus room", "kind": "Video", "description": "Reception Room (Qa'a), Ottoman period, 1119 a.h. / 1707 a.d., Damascus, Syria, poplar, gesso relief with gold and tin leaf, glazes and paint; cypress, poplar, walnut, black mulberry, mother-of pearl, marble and other stones, stucco with glass, plaster, ceramic tiles, iron, brass, 22 feet and a 1/2 inch high x 16 feet, 8-1/2 inches deep x 26 feet, 4-3/4 inches long, Metropolitan Museum of Art.\nA conversation between Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker by the Damascus Room.", "slug": "damascus-room"}, {"path": "khan/humanities/art-islam/islamic-art-late-period/damascusroom/", "id": "L155lNA9Y0Y", "title": "Conserving the Damascus Room at The Metropolitan Museum of Art", "kind": "Video", "description": "The Damascus Room (1707) served as the reception area within a Syrian home of the Ottoman period. Extensive conservation and historical research were carried out by the Metropolitan Museum in preparation for the opening of the new galleries on November 1, 2011.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an Educator Resource.", "slug": "damascusroom"}], "in_knowledge_map": false, "description": "Later Period (c. 1517 \u20131924 C.E.)\nThe Ottomans, a small Turkic state in Anatolia, emerged as a major military and political force and conquered Constantinople, the Balkans, the Near East, and North Africa.", "node_slug": "islamic-art-late-period", "render_type": "Tutorial", "topic_page_url": "/humanities/art-islam/islamic-art-late-period", "extended_slug": "humanities/art-islam/islamic-art-late-period", "kind": "Topic", "slug": "islamic-art-late-period"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/art-islam/arts-islamic-quiz/", "id": "arts-islamic-quiz", "hide": false, "title": "Arts of the Islamic world (quiz)", "child_data": [{"kind": "Exercise", "id": "xa371ec9c"}], "children": [{"path": "khan/humanities/art-islam/arts-islamic-quiz/arts-of-the-islamic-world/", "id": "arts-of-the-islamic-world", "title": "Arts of the Islamic World", "description": "Test your knowledge of the arts of the Islamic world!", "slug": "arts-of-the-islamic-world", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Test your knowledge of the arts of the Islamic world!", "node_slug": "arts-islamic-quiz", "render_type": "Tutorial", "topic_page_url": "/humanities/art-islam/arts-islamic-quiz", "extended_slug": "humanities/art-islam/arts-islamic-quiz", "kind": "Topic", "slug": "arts-islamic-quiz"}], "in_knowledge_map": false, "description": "Discover fourteen centuries of Islamic art and culture.", "node_slug": "art-islam", "render_type": "Subject", "topic_page_url": "/humanities/art-islam", "extended_slug": "humanities/art-islam", "kind": "Topic", "slug": "art-islam"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/", "id": "renaissance-reformation", "hide": false, "title": "Renaissance and Reformation in Europe", "child_data": [{"kind": "Topic", "id": "x5a42d605"}, {"kind": "Topic", "id": "x7dad4bed"}, {"kind": "Topic", "id": "xd77c8847"}, {"kind": "Topic", "id": "xa12f6723"}, {"kind": "Topic", "id": "xa2c8a483"}, {"kind": "Topic", "id": "x27a90daf"}, {"kind": "Topic", "id": "xe9acac90"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/northern-renaissance1/", "id": "northern-renaissance1", "hide": false, "title": "Northern Renaissance: the fifteenth century", "child_data": [{"kind": "Topic", "id": "xb6f4c3f1"}, {"kind": "Topic", "id": "xe682ca75"}, {"kind": "Topic", "id": "xf8825353"}, {"kind": "Topic", "id": "xfd35dfd5"}, {"kind": "Topic", "id": "x28f5c5af"}, {"kind": "Topic", "id": "xff8112bd"}, {"kind": "Topic", "id": "x337a1452"}, {"kind": "Topic", "id": "xac487032"}, {"kind": "Topic", "id": "xfe382e02"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/renaissance-reformation/northern-renaissance1/beginners-guide-northern-renaissance/", "id": "beginners-guide-northern-renaissance", "hide": false, "title": "A beginner's guide to the Northern Renaissance", "child_data": [{"kind": "Article", "id": "x9c0c3f21"}, {"kind": "Article", "id": "x126e35bd"}, {"kind": "Article", "id": "x7629585f"}, {"kind": "Exercise", "id": "xb15ff89d"}, {"kind": "Exercise", "id": "x4aa22b98"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern-renaissance1/beginners-guide-northern-renaissance/art-in-burgundy-1400-1500/", "id": "art-in-burgundy--1400-1500", "title": "Northern Renaissance in the fifteenth century (quiz\u2014part 1)", "description": "Test your knowledge!", "slug": "art-in-burgundy-1400-1500", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/beginners-guide-northern-renaissance/burgundy-quiz/", "id": "burgundy-quiz", "title": "Northern Renaissance in the fifteenth century (quiz\u2014part 2)", "description": "Test your knowledge!", "slug": "burgundy-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In the 15th century, the northern European countries we know today as Belgium, the Netherlands and Luxembourg were controlled by the enormously wealthy Dukes of Burgundy (Burgundy is a region in France). Today the 15th century in this region is often referred to today as the Burgundian Netherlands. The court of the Dukes of Burgundy were the most important patrons of the early Northern Renaissance, but newly wealthy private citizens also commissioned art as part of a growing interest in private meditation and prayer. Portraits were also commissioned in growing numbers.", "node_slug": "beginners-guide-northern-renaissance", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern-renaissance1/beginners-guide-northern-renaissance", "extended_slug": "humanities/renaissance-reformation/northern-renaissance1/beginners-guide-northern-renaissance", "kind": "Topic", "slug": "beginners-guide-northern-renaissance"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/northern-renaissance1/sluter/", "id": "sluter", "hide": false, "title": "Claus Sluter and Claus de Werve", "child_data": [{"kind": "Video", "id": "726969943"}, {"kind": "Exercise", "id": "x192c28e6"}, {"kind": "Video", "id": "1271972302"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern-renaissance1/sluter/claus-sluter-well-of-moses/", "id": "xdIVZrr_8tI", "title": "Sluter, Well of Moses", "kind": "Video", "description": "Claus Sluter (with Claus de Werve), The Well of Moses, 1395-1405 (calvary finished 1399, prophets 1402-05, painted by Jean Malouel c. 1402), Asni\u00e8res stone with gilding and polychromy, slightly less than 7 meters high, originally close to 13 meters with cross. Located on the grounds of the former Chartreuse de Champmol, a Carthusian monastery in Dijon, France established by Philip the Bold, Duke of Burgundy. The prophets depicted include: Moses, David, Jeremiah, Zachariah, Daniel, and Isaiah. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "claus-sluter-well-of-moses"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/sluter/sluter-s-well-of-moses-quiz/", "id": "sluter-s-well-of-moses-quiz", "title": "Sluter, Well of Moses (quiz)", "description": "Test your knowledge.", "slug": "sluter-s-well-of-moses-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/sluter/claus-sluter-with-claus-de-werve-mourners-tomb-of-philip-the-installed-1410/", "id": "WdAFrBpP1Bw", "title": "Claus Sluter and Claus de Werve, Mourners, from the Tomb of Philip the Bold", "kind": "Video", "description": "Claus Sluter (with Claus de Werve), Mourners, Tomb of Philip the Bold, Duke of Burgundy, 1410 (Museum of Fine Arts, Dijon) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "claus-sluter-with-claus-de-werve-mourners-tomb-of-philip-the-installed-1410"}], "in_knowledge_map": false, "description": "", "node_slug": "sluter", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern-renaissance1/sluter", "extended_slug": "humanities/renaissance-reformation/northern-renaissance1/sluter", "kind": "Topic", "slug": "sluter"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/northern-renaissance1/campin/", "id": "campin", "hide": false, "title": "Campin", "child_data": [{"kind": "Video", "id": "719474982"}, {"kind": "Video", "id": "671422828"}, {"kind": "Exercise", "id": "x234ee426"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern-renaissance1/campin/robert-campin-christ-and-the-virgin-c-1430-35/", "id": "Axox0C6aoTo", "title": "Campin, Christ and the Virgin", "kind": "Video", "description": "Robert Campin (also called the Master of Fl\u00e9malle), Christ and the Virgin, c. 1430-35, oil and gold on panel, 11-1/4 x 17-15/16 inches / 28.6 x 45.6 cm (Philadelphia Museum of Art)", "slug": "robert-campin-christ-and-the-virgin-c-1430-35"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/campin/campin-merode-altarpiece-1425-28/", "id": "WdDzs70Txjs", "title": "Workshop of Campin, Annunciation Triptych (Merode Altarpiece)", "kind": "Video", "description": "Robert Campin, Merode Altarpiece, tempera and oil on panel, 1425-28 (Metropolitan Museum of Art) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "campin-merode-altarpiece-1425-28"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/campin/campin-s-merode-altarpiece/", "id": "campin-s-merode-altarpiece", "title": "Workshop of Campin, Annunciation Triptych (Merode Altarpiece) (quiz)", "description": "Test your knowledge.", "slug": "campin-s-merode-altarpiece", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "campin", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern-renaissance1/campin", "extended_slug": "humanities/renaissance-reformation/northern-renaissance1/campin", "kind": "Topic", "slug": "campin"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/", "id": "burgundy-netherlands", "hide": false, "title": "Van Eyck", "child_data": [{"kind": "Video", "id": "xc52a136f"}, {"kind": "Video", "id": "x4657d73e"}, {"kind": "Article", "id": "x5143ba0e"}, {"kind": "Exercise", "id": "x7bf74145"}, {"kind": "Video", "id": "xd648f685"}, {"kind": "Video", "id": "708157436"}, {"kind": "Video", "id": "669432581"}, {"kind": "Exercise", "id": "x3f4133e0"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/ghent-altarpiece-closed/", "id": "udgNvPpDb2I", "title": "Van Eyck, Ghent Altarpiece (1 of 2)", "kind": "Video", "description": "Jan van Eyck, Ghent Altarpiece (closed), completed 1432, oil on wood, 11\u2019 5\u201d x 7\u2019 6\u201d (Saint Bavo Cathedral, Ghent, Belgium).\u00a0Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "ghent-altarpiece-closed"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/ghent-altar-open/", "id": "JVhwinCiELI", "title": "Jan van Eyck, The Ghent Altarpiece (2 of 2)", "kind": "Video", "description": "Jan van Eyck, Ghent Altarpiece (open), completed 1432, oil on wood, 11\u2019 5\u201d x 7\u2019 6\u201d (Saint Bavo Cathedral, Ghent, Belgium).\u00a0Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "ghent-altar-open"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/ghent-altarpiece-quiz/", "id": "ghent-altarpiece-quiz", "title": "Van Eyck, Ghent Altarpiece (quiz)", "description": "This quiz covers two videos: Jan van Eyck, The Ghent Altarpiece (open), 1432 and Jan can Eyck, The Ghent Altarpeice (open), 1432.", "slug": "ghent-altarpiece-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/jan-van-eyck-portrait-of-a-man-self-portrait/", "id": "B9vXathZikM", "title": "Jan van Eyck, Portrait of a Man in a Red Turban (Self-Portrait?), 1433", "kind": "Video", "description": "Jan van Eyck, Portrait of a Man in a Red Turban (Self-Portrait?),\u00a01433, oil on oak panel, 26 x 19 cm (The National Gallery, London)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "jan-van-eyck-portrait-of-a-man-self-portrait"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/jan-van-eyck-the-madonna-in-the-church-c-1438/", "id": "RkUdm-GiSVc", "title": "Jan van Eyck, The Madonna in the Church", "kind": "Video", "description": "Jan van Eyck, The Madonna in the Church, c. 1438, oil on oak, 31 x 14 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin). In the Google Art Project: http://www.googleartproject.com/collection/gemaldegalerie/artwork/the-madonna-in-the-church-jan-van-eyck/330338/", "slug": "jan-van-eyck-the-madonna-in-the-church-c-1438"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/van-eyck-portrait-of-giovanni-arnolfini-and-his-wife-1434/", "id": "9ODhKqFaugQ", "title": "Van Eyck, The Arnolfini Portrait", "kind": "Video", "description": "Jan Van Eyck, The Arnolfini Portrait, tempera and oil on wood, 1434 (National Gallery, London). Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "van-eyck-portrait-of-giovanni-arnolfini-and-his-wife-1434"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands/portrait-of-giovanni-arnolfini-and-his-wife-quiz/", "id": "portrait-of-giovanni-arnolfini-and-his-wife-quiz", "title": "Van Eyck, The Arnolfini Portrait (quiz)", "description": "Test your knowledge.", "slug": "portrait-of-giovanni-arnolfini-and-his-wife-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "burgundy-netherlands", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands", "extended_slug": "humanities/renaissance-reformation/northern-renaissance1/burgundy-netherlands", "kind": "Topic", "slug": "burgundy-netherlands"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/renaissance-reformation/northern-renaissance1/christus/", "id": "christus", "hide": false, "title": "Christus", "child_data": [{"kind": "Video", "id": "671711112"}, {"kind": "Video", "id": "708157435"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern-renaissance1/christus/christus-portrait-of-a-carthusian-1446/", "id": "2b7Qv5dtdf8", "title": "Christus, Portrait of a Carthusian", "kind": "Video", "description": "Petrus Christus, Portrait of a Carthusian, 1446 (Metropolitan Museum of Art). Speakers: Dr. David Drogin, Dr. Beth Harris", "slug": "christus-portrait-of-a-carthusian-1446"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/christus/petrus-christus-portrait-of-a-young-woman-c-1470/", "id": "bcrsyGxUbkA", "title": "Christus, Portrait of a Young Girl", "kind": "Video", "description": "Petrus Christus, Portrait of a Young Woman, c. 1470, oil on oak, 29 x 22.50 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin). In the Google Art Project: http://www.googleartproject.com/collection/gemaldegalerie/artwork/portrait-of-a-young-woman-petrus-christus/324332/", "slug": "petrus-christus-portrait-of-a-young-woman-c-1470"}], "in_knowledge_map": false, "description": "", "node_slug": "christus", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern-renaissance1/christus", "extended_slug": "humanities/renaissance-reformation/northern-renaissance1/christus", "kind": "Topic", "slug": "christus"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/northern-renaissance1/weyden/", "id": "weyden", "hide": false, "title": "Van der Weyden", "child_data": [{"kind": "Video", "id": "671711114"}, {"kind": "Exercise", "id": "x65506b53"}, {"kind": "Video", "id": "719836277"}, {"kind": "Video", "id": "671397707"}, {"kind": "Video", "id": "719746434"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern-renaissance1/weyden/rogier-van-der-weyden-deposition-c-1435/", "id": "SLf_oAkngP4", "title": "Van der Weyden, Deposition", "kind": "Video", "description": "Rogier van der Weyden, Deposition, c. 1435 (Prado, Madrid)\n\nSpeakers: David Drogin and Beth Harris", "slug": "rogier-van-der-weyden-deposition-c-1435"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/weyden/van-der-weyden-s-deposition-quiz/", "id": "van-der-weyden-s-deposition-quiz", "title": "Van der Weyden's Deposition Quiz", "description": "This quiz is for the video Van der Weyden, Deposition.", "slug": "van-der-weyden-s-deposition-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/weyden/rogier-van-der-weyden-crucifixion-triptych-c-1445/", "id": "HhN5Zkbpt_k", "title": "Van der Weyden, Crucifixion Triptych", "kind": "Video", "description": "Rogier van der Weyden, Crucifixion Triptych, c. 1445, oil on oak, center panel: 101 x 70 cm, each wing: 101 x 35 cm (Kunsthistorisches Museum, Vienna)", "slug": "rogier-van-der-weyden-crucifixion-triptych-c-1445"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/weyden/rogier-van-der-weyden-the-last-judgment-1446-52/", "id": "uFiyXC_x2U0", "title": "Van der Weyden, The Last Judgment Polyptych", "kind": "Video", "description": "Rogier van der Weyden, The Last Judgment Polyptych, oil on panel partially transferred on canvas, 1446-52 (Mus\u00e9e de l'H\u00f4tel Dieu, Beaune)", "slug": "rogier-van-der-weyden-the-last-judgment-1446-52"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/weyden/rogier-van-der-weyden-the-crucifixion-with-the-virgin-and-st-john-the-evangelist-c-1460/", "id": "ULgGEXBmNlw", "title": "Van der Weyden, Crucifixion, with the Virgin and Saint John", "kind": "Video", "description": "Rogier van der Weyden, The Crucifixion, with the Virgin and Saint John the Evangelist Mourning, c. 1460, oil on panel, 71 x 73-3/8 inches / 180.3 x 186.4 cm (Philadelphia Museum of Art)", "slug": "rogier-van-der-weyden-the-crucifixion-with-the-virgin-and-st-john-the-evangelist-c-1460"}], "in_knowledge_map": false, "description": "", "node_slug": "weyden", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern-renaissance1/weyden", "extended_slug": "humanities/renaissance-reformation/northern-renaissance1/weyden", "kind": "Topic", "slug": "weyden"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/renaissance-reformation/northern-renaissance1/vandergoes/", "id": "vandergoes", "hide": false, "title": "Van der Goes", "child_data": [{"kind": "Video", "id": "708141469"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern-renaissance1/vandergoes/hugo-van-der-goes-the-adoration-of-the-kings-monforte-altar-c-1470/", "id": "B0eHEo-f6fc", "title": "Van der Goes, The Adoration of the Kings", "kind": "Video", "description": "Hugo van der Goes, The Adoration of the Kings (Monforte Altar), c. 1470, oil on oak, 147 x 242 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)", "slug": "hugo-van-der-goes-the-adoration-of-the-kings-monforte-altar-c-1470"}], "in_knowledge_map": false, "description": "", "node_slug": "vandergoes", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern-renaissance1/vandergoes", "extended_slug": "humanities/renaissance-reformation/northern-renaissance1/vandergoes", "kind": "Topic", "slug": "vandergoes"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/renaissance-reformation/northern-renaissance1/quarton/", "id": "quarton", "hide": false, "title": "Quarton (?)", "child_data": [{"kind": "Video", "id": "xe7469616"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern-renaissance1/quarton/pieta-villeneuve/", "id": "_0YdFG17fQc", "title": "Enguerrand Quarton(?), Piet\u00e0 of Villeneuve-l\u00e8s-Avignon", "kind": "Video", "description": "Enguerrand Quarton(?), Piet\u00e0 of Villeneuve-l\u00e8s-Avignon, c. 1455, oil on wood, 163 x 219 cm (Mus\u00e9e du Louvre)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "pieta-villeneuve"}], "in_knowledge_map": false, "description": "", "node_slug": "quarton", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern-renaissance1/quarton", "extended_slug": "humanities/renaissance-reformation/northern-renaissance1/quarton", "kind": "Topic", "slug": "quarton"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/renaissance-reformation/northern-renaissance1/reliquaries-manuscripts-tapestries/", "id": "reliquaries-manuscripts-tapestries", "hide": false, "title": "Reliquaries, manuscripts and tapestries", "child_data": [{"kind": "Video", "id": "xf9038a71"}, {"kind": "Article", "id": "x660c5501"}, {"kind": "Video", "id": "x1efe30a2"}, {"kind": "Video", "id": "671397705"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern-renaissance1/reliquaries-manuscripts-tapestries/holy-thorn-reliquary/", "id": "0Xxm2SGuGTk", "title": "The Holy Thorn Reliquary of Jean, duc de Berry", "kind": "Video", "description": "The Holy Thorn Reliquary houses one of the most important relics of all time - a thorn from the Crown of Thorns that was put on Christ's head during the Crucifixion. \u00a9 Trustees of the British Museum", "slug": "holy-thorn-reliquary"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/reliquaries-manuscripts-tapestries/boy-genius/", "id": "1_ZAunahU7c", "title": "Herman, Paul, and Jean de Limbourg, The Belles Heures of Jean de France, Duc de Berry", "kind": "Video", "description": "Met curator Timothy B. Husband on prodigy in Herman, Paul, and Jean de Limbourg\u2019s The Belles Heures of Jean de France, Duc de Berry,\u00a01405\u20131408/1409.\n\nCompleted by late 1408 or early 1409, probably in Paris, \"The Belles Heures,\" a private devotional book, was the first of two sumptuous manuscripts commissioned by the duke of Berry from the Limbourg brothers, Pol, Jean, and Herman. It is the only manuscript that they completed in its entirety. The other manuscript, \"The Tr\u00e8s Riches Heures,\" was left incomplete at the brothers' deaths in 1416. The richly illustrated text is amplified by unusual cycles reflecting the duke's personal interests. Using a luminous palette, the artists blended an intimate Northern vision of nature with Italianate modes of figural articulation. The keen interest in the natural world and the naturalistic means of representing it, so striking in ninety-four full-page and fifty-four column illuminations, foreshadow the work of Jan van Eyck and the ensuing generations of outstanding fifteenth-century painters in the South Netherlands.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "boy-genius"}, {"path": "khan/humanities/renaissance-reformation/northern-renaissance1/reliquaries-manuscripts-tapestries/the-unicorn-in-captivity-1495-1505/", "id": "26WASJHF46A", "title": "The Unicorn in Captivity", "kind": "Video", "description": "The Unicorn in Captivity (one of seven woven hangings popularly known as the Unicorn Tapestries or the Hunt of the Unicorn), 1495-1505, South Netherlandish, wool, silk, silver, and gilt (The Cloisters, The Metropolitan Museum of Art)", "slug": "the-unicorn-in-captivity-1495-1505"}], "in_knowledge_map": false, "description": "", "node_slug": "reliquaries-manuscripts-tapestries", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern-renaissance1/reliquaries-manuscripts-tapestries", "extended_slug": "humanities/renaissance-reformation/northern-renaissance1/reliquaries-manuscripts-tapestries", "kind": "Topic", "slug": "reliquaries-manuscripts-tapestries"}], "in_knowledge_map": false, "description": "Northern Europe\u2019s wealthy merchants and nobles supported the art of van Eyck, Bosch, D\u00fcrer, Bruegel, and Holbein; art that invites us back to their world.", "node_slug": "northern-renaissance1", "render_type": "Topic", "topic_page_url": "/humanities/renaissance-reformation/northern-renaissance1", "extended_slug": "humanities/renaissance-reformation/northern-renaissance1", "kind": "Topic", "slug": "northern-renaissance1"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/early-renaissance1/", "id": "early-renaissance1", "hide": false, "title": "Early Renaissance in Italy: the fifteenth century", "child_data": [{"kind": "Topic", "id": "xb4f38115"}, {"kind": "Topic", "id": "xc3023d8d"}, {"kind": "Topic", "id": "xde07fefe"}, {"kind": "Topic", "id": "xfb542d80"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/renaissance-reformation/early-renaissance1/beginners-renaissance-florence/", "id": "beginners-renaissance-florence", "hide": false, "title": "A beginner's guide to Renaissance Florence", "child_data": [{"kind": "Article", "id": "xb6d685d6"}, {"kind": "Article", "id": "x5060f51d"}, {"kind": "Video", "id": "x2ce5df17"}, {"kind": "Video", "id": "671563209"}, {"kind": "Video", "id": "xbd813a40"}, {"kind": "Article", "id": "x4450e1fa"}, {"kind": "Article", "id": "xa722700b"}, {"kind": "Video", "id": "671539951"}], "children": [{"path": "khan/humanities/renaissance-reformation/early-renaissance1/beginners-renaissance-florence/contrapposto/", "id": "1iTC9cBk6Ac", "title": "Contrapposto", "kind": "Video", "description": "A brief explanation of the term \"contrapposto\" comparing two ancient Greek sculptures: the New York Kouros and an ancient Roman copy of the Doryphoros (or Spear Bearer) by Polykleitos. Although these particular objects may not have been known in the Renaissance, the ideas and form of contrapposto were revived in the Italian Renaissance.\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "contrapposto"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/beginners-renaissance-florence/linear-perspective-brunelleschi-s-experiement/", "id": "bkNMM8uiMww", "title": "Linear Perspective: Brunelleschi's Experiment", "kind": "Video", "description": "An introduction to Filippo Brunelleschi's experiment regarding linear perspective, c. 1420, in front of the Baptistry in Florence", "slug": "linear-perspective-brunelleschi-s-experiement"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/beginners-renaissance-florence/how-one-point-linear-perspective-works/", "id": "eOksHhQ8TLM", "title": "How one-point linear perspective works", "kind": "Video", "description": "Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "how-one-point-linear-perspective-works"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/beginners-renaissance-florence/orsanmichele-florence-1349-loggia-1380-1404-upper-stories/", "id": "-V51ZjxFeH4", "title": "Orsanmichele", "kind": "Video", "description": "Orsanmichele, Florence, 1349 loggia (1380-1404 upper stories)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "orsanmichele-florence-1349-loggia-1380-1404-upper-stories"}], "in_knowledge_map": false, "description": "The Renaissance really gets going in the early years of 15th century in Florence. In this period, which we call the Early Renaissance, Florence is not a city in the unified country of Italy, as it is now. Instead, Italy was divided into many city-states (Florence, Milan, Venice etc.), each with their own government (some were ruled by despots, and others were republics).", "node_slug": "beginners-renaissance-florence", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/early-renaissance1/beginners-renaissance-florence", "extended_slug": "humanities/renaissance-reformation/early-renaissance1/beginners-renaissance-florence", "kind": "Topic", "slug": "beginners-renaissance-florence"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/", "id": "sculpture-architecture-florence", "hide": false, "title": "Sculpture and architecture in Florence", "child_data": [{"kind": "Video", "id": "956894708"}, {"kind": "Exercise", "id": "x380da7e6"}, {"kind": "Video", "id": "x5a9c3264"}, {"kind": "Video", "id": "952814014"}, {"kind": "Video", "id": "671539956"}, {"kind": "Exercise", "id": "xdcb9e276"}, {"kind": "Video", "id": "956896601"}, {"kind": "Exercise", "id": "x85519528"}, {"kind": "Video", "id": "952814015"}, {"kind": "Video", "id": "x47604f6d"}, {"kind": "Video", "id": "671260994"}, {"kind": "Exercise", "id": "xad67baf3"}, {"kind": "Video", "id": "808366548"}, {"kind": "Video", "id": "719513883"}, {"kind": "Video", "id": "671563210"}, {"kind": "Article", "id": "xd17a8a37"}, {"kind": "Exercise", "id": "x2698fc84"}, {"kind": "Video", "id": "xedb3d0fb"}, {"kind": "Video", "id": "x7d306d02"}, {"kind": "Video", "id": "xe9f10a71"}, {"kind": "Article", "id": "xe836b598"}, {"kind": "Exercise", "id": "x2887a315"}, {"kind": "Article", "id": "xc37d0d8d"}], "children": [{"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/brunelleschi-ghiberti-sacrifice-of-isaac-competition-panels-1401-2/", "id": "uvgBSJPiQ8Y", "title": "Brunelleschi & Ghiberti, the Sacrifice of Isaac", "kind": "Video", "description": "Brunelleschi & Ghiberti, Sacrifice of Isaac, competition panels for the second set of bronze doors for the Florence Baptistery, 1401-2 Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "brunelleschi-ghiberti-sacrifice-of-isaac-competition-panels-1401-2"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/brunelleschi-and-ghiberti-s-sacrifice-of-isaac-quiz/", "id": "brunelleschi-and-ghiberti-s-sacrifice-of-isaac-quiz", "title": "Brunelleschi and Ghiberti, Sacrifice of Isaac (quiz)", "description": "Test your knowledge.", "slug": "brunelleschi-and-ghiberti-s-sacrifice-of-isaac-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/ghiberti-gates-paradise/", "id": "fWkewBPMKEk", "title": "Ghiberti, \"Gates of Paradise,\" east doors of the Florence Baptistery", "kind": "Video", "description": "Lorenzo Ghiberti, \"Gates of Paradise,\" East Doors of the Florence Baptistery, bronze, 1425-52. Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "ghiberti-gates-paradise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/brunelleschi-old-sacristy-san-lorenzo-florence-begun-c-1421/", "id": "jYZ71Zma9Gc", "title": "Brunelleschi, Old Sacristy", "kind": "Video", "description": "Brunelleschi, Old Sacristy, San Lorenzo, Florence, begun c. 1421 Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "brunelleschi-old-sacristy-san-lorenzo-florence-begun-c-1421"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/brunelleschi-dome-of-the-cathedral-of-florence-1420-36/", "id": "TQ8F_yPwqzA", "title": "Brunelleschi, Dome of the Cathedral of Florence.", "kind": "Video", "description": "Brunelleschi, Dome of the Cathedral of Florence, 1420-36. \u00a0Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "brunelleschi-dome-of-the-cathedral-of-florence-1420-36"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/brunelleschi-s-dome-quiz/", "id": "brunelleschi-s-dome-quiz", "title": "Brunelleschi, Dome (quiz)", "description": "Test your knowledge.", "slug": "brunelleschi-s-dome-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/brunelleschi-pazzi-chapel-santa-croce-florence-completed-1460s/", "id": "LKv0hRyiGCY", "title": "Brunelleschi, Pazzi Chapel", "kind": "Video", "description": "Filippo Brunelleschi, Pazzi Chapel, Santa Croce, Florence, begun 1420s, completed 1460s Speakers: Dr. Beth Harris and Dt. Steven Zucker", "slug": "brunelleschi-pazzi-chapel-santa-croce-florence-completed-1460s"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/pazzi-chapel-quiz/", "id": "pazzi-chapel-quiz", "title": "Brunelleschi, Pazzi Chapel (quiz)", "description": "Test your knowledge.", "slug": "pazzi-chapel-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/brunelleschi-s-santo-spirito-florence-1428-81/", "id": "ggpKKlsaeac", "title": "Brunelleschi, Santo Spirito", "kind": "Video", "description": "Filippo Brunelleschi's Santo Spirito, Florence, 1428-81\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "brunelleschi-s-santo-spirito-florence-1428-81"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/nanni-di-banco-four-crowned-saints/", "id": "LPZ5C3CgavE", "title": "Nanni di Banco, Four Crowned Saints", "kind": "Video", "description": "Nanni Di Banco,\u00a0Four Crowned Saints, Or San Michele, Florence, Italy, c. 1410-16, marble, figures 6' high", "slug": "nanni-di-banco-four-crowned-saints"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-st-mark-1411-13/", "id": "A8GQfq3U96M", "title": "Donatello, Saint Mark", "kind": "Video", "description": "Donatello, St. Mark, 1411-13, marble, 93\" (236 cm), Orsanmichele, Florence\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "donatello-st-mark-1411-13"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-s-st-mark-quiz/", "id": "donatello-s-st--mark-quiz", "title": "Donatello, St. Mark (quiz)", "description": "Test your knowledge.", "slug": "donatello-s-st-mark-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-feast-of-herod-1423-27/", "id": "J9_ouZpBknM", "title": "Donatello, Feast of Herod", "kind": "Video", "description": "Donatello, Feast of Herod, panel on the baptismal font of Siena Cathedral, Siena, Italy, Gilded bronze,1423--1427.", "slug": "donatello-feast-of-herod-1423-27"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-madonna-of-the-clouds-c-1425-35/", "id": "q3N1IqBoKSo", "title": "Donatello, Madonna of the Clouds", "kind": "Video", "description": "Donatello, Madonna of the Clouds, c. 1425--35, marble, 33.1 x 32 cm / 13 1/16 x 12 5/8 inches (Museum of Fine Arts, Boston)", "slug": "donatello-madonna-of-the-clouds-c-1425-35"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-david-bronze-c-1440s/", "id": "6kUUJJV_MNA", "title": "Donatello, David", "kind": "Video", "description": "Donatello, David, bronze, late 1420s to the 1460s, likely the 1440s (Museo Nazionale del Bargello, Florence)", "slug": "donatello-david-bronze-c-1440s"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-s-david-quiz/", "id": "donatello-s-david-quiz", "title": "Donatello, David (quiz)", "description": "Test your knowledge.", "slug": "donatello-s-david-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-equestrian-monument-of-gattamelata/", "id": "6dWHPHELCKU", "title": "Donatello, Equestrian Monument of Gattamelata", "kind": "Video", "description": "Donatello, Equestrian Monument of Gattamelata (Erasmo da Narni), 1445-53, bronze, 12 feet, 2 inches high, Piazza del Santo, Padua Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "donatello-equestrian-monument-of-gattamelata"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/donatello-mary-magdalene/", "id": "-UZuG3XpAd0", "title": "Donatello, Mary Magdalene", "kind": "Video", "description": "Donatello, Mary Magdalene, c. 1455, wood, 188 cm (Museo dell'Opera del Duomo, Florence)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "donatello-mary-magdalene"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/alberti-palazzo-rucellai/", "id": "MHuUBkyF8KI", "title": "Alberti, Palazzo Rucellai", "kind": "Video", "slug": "alberti-palazzo-rucellai"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/palazzo-rucellai-quiz/", "id": "palazzo-rucellai-quiz", "title": "Alberti, Palazzo Rucellai (quiz)", "description": "Test your knowledge.", "slug": "palazzo-rucellai-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Sculpture and architecture are central to the cultural development of Renaissance Florence. Like chapels, palaces, and cathedrals, sculpture was used to express the wealth, power and piety of the city's leading patrons and guilds. Learn about the brilliant innovations of Brunelleschi, his friend Donatello and other leading artists that helped define the Renaissance.", "node_slug": "sculpture-architecture-florence", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence", "extended_slug": "humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence", "kind": "Topic", "slug": "sculpture-architecture-florence"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/", "id": "painting-in-florence", "hide": false, "title": "Painting in Florence and Rome", "child_data": [{"kind": "Video", "id": "xc2196a70"}, {"kind": "Article", "id": "x02384fc3"}, {"kind": "Video", "id": "669432585"}, {"kind": "Video", "id": "835852229"}, {"kind": "Article", "id": "x4d0ed9fc"}, {"kind": "Exercise", "id": "x532a67df"}, {"kind": "Video", "id": "820638040"}, {"kind": "Article", "id": "x85157cb8"}, {"kind": "Exercise", "id": "x93be4d46"}, {"kind": "Video", "id": "952814013"}, {"kind": "Video", "id": "671563212"}, {"kind": "Video", "id": "671260991"}, {"kind": "Exercise", "id": "x0b83c0ca"}, {"kind": "Video", "id": "1239055966"}, {"kind": "Video", "id": "719660620"}, {"kind": "Article", "id": "x18c47408"}, {"kind": "Exercise", "id": "xc707482c"}, {"kind": "Video", "id": "671711108"}, {"kind": "Video", "id": "671711110"}, {"kind": "Video", "id": "671397706"}, {"kind": "Article", "id": "xc79d945f"}, {"kind": "Article", "id": "xe72d7b0a"}, {"kind": "Article", "id": "x3b97172b"}, {"kind": "Article", "id": "xcba4104a"}, {"kind": "Video", "id": "671397708"}, {"kind": "Video", "id": "816126260"}, {"kind": "Exercise", "id": "xc60ff1ae"}, {"kind": "Exercise", "id": "x4188b034"}], "children": [{"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/gentile-adoration/", "id": "4kbv2Gaw-9U", "title": "Gentile da Fabriano, Adoration of the Magi", "kind": "Video", "description": "Gentile da Fabriano, Adoration of the Magi, 1423, tempera on panel, 283 x 300 cm (Uffizi Gallery, Florence)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "gentile-adoration"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/masaccio-madonna-enthroned-1426/", "id": "6LurHwFfrIA", "title": "Masaccio, Virgin and Child Enthroned", "kind": "Video", "description": "Masaccio (Tommaso di Ser Giovanni di Simone), Virgin and Child Enthroned, 1426, tempera on panel (National Gallery, London). Ser Giuliano degli Scarsi, a notary from Pisa commissioned this altarpiece for the chapel of Saint Julian in Santa Maria del Carmine, Pisa Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "masaccio-madonna-enthroned-1426"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/masaccio-holy-trinity-c-1427/", "id": "Kl4Dcj9o570", "title": "Masaccio, Holy Trinity", "kind": "Video", "description": "Masaccio, Holy Trinity, c. 1427, Fresco, 667 x 317 cm, Santa Maria Novella, Florence", "slug": "masaccio-holy-trinity-c-1427"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/masaccio-s-holy-trinity-quiz/", "id": "masaccio-s-holy-trinity-quiz", "title": "Masaccio, Holy Trinity (quiz)", "description": "Test your knowledge.", "slug": "masaccio-s-holy-trinity-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/masaccio-the-tribute-money-1427/", "id": "oDPNSPbjzQ8", "title": "Masaccio, The Tribute Money in the Brancacci Chapel", "kind": "Video", "description": "Masaccio, The Tribute Money, 1427, fresco (Brancacci Chapel, Santa Maria del Carmine, Florence) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "masaccio-the-tribute-money-1427"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/masaccio-s-tribute-money-quiz/", "id": "masaccio-s-tribute-money-quiz", "title": "Masaccio, Tribute Money (quiz)", "description": "Test your knowledge.", "slug": "masaccio-s-tribute-money-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/masaccio-expulsion-of-adam-and-eve-from-eden-brancacci-chapel-c-1424-1427/", "id": "hMzFbORRiss", "title": "Masaccio, Expulsion of Adam and Eve from Eden", "kind": "Video", "description": "Masaccio, Expulsion of Adam and Eve from Eden, Brancacci Chapel, Santa Maria del Carmine, Florence, Italy, ca. 1424--1427. Fresco, 7' x 2' 11\"", "slug": "masaccio-expulsion-of-adam-and-eve-from-eden-brancacci-chapel-c-1424-1427"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/fra-angelico-the-annunciation-and-life-of-the-virgin-in-the-predella-c-1426/", "id": "6lH7zWK_SAg", "title": "Fra Angelico, The Annunciation (Prado)", "kind": "Video", "description": "Fra Angelico, The Annunciation and Life of the Virgin (in the predella), c. 1426, tempera on wood, 194 x 194 cm (Museo del Prado, Madrid) Speakers: Dr. Beth Harris and Dr. Steven Zucker\nThe Annunciation is described in the Gospel According to Luke 1:26 - 38.\u00a0\nBelow is the King James translation:\n\n26\u00a0And in the sixth month the angel Gabriel was sent from God unto a city of Galilee, named Nazareth,\u00a027\u00a0To a virgin espoused to a man whose name was Joseph, of the house of David; and the virgin's name [was] Mary.\u00a028\u00a0And the angel came in unto her, and said, Hail, [thou that art] highly favoured, the Lord [is] with thee: blessed [art] thou among women.\u00a029\u00a0And when she saw [him], she was troubled at his saying, and cast in her mind what manner of salutation this should be.\u00a030\u00a0And the angel said unto her, Fear not, Mary: for thou hast found favour with God.\u00a031\u00a0And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS.\u00a032\u00a0He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David:\u00a033\u00a0And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.\u00a034\u00a0Then said Mary unto the angel, How shall this be, seeing I know not a man?\u00a035\u00a0And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.\u00a036\u00a0And, behold, thy cousin Elisabeth, she hath also conceived a son in her old age: and this is the sixth month with her, who was called barren.\u00a037\u00a0For with God nothing shall be impossible.\u00a038\u00a0And Mary said, Behold the handmaid of the Lord; be it unto me according to thy word. And the angel departed from her.", "slug": "fra-angelico-the-annunciation-and-life-of-the-virgin-in-the-predella-c-1426"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/fra-angelico-the-annunciation-c-1438-47/", "id": "3B-V_pG3HPQ", "title": "Fra Angelico, The Annunciation", "kind": "Video", "description": "Fra Angelico, The Annunciation, c. 1438-47, fresco, 230 x 321 cm (Convent of San Marco, Florence). \u00a0Speakers: Dr Beth Harris and Dr. Steven Zucker", "slug": "fra-angelico-the-annunciation-c-1438-47"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/fra-angelico-s-annunciation-quiz/", "id": "fra-angelico-s-annunciation-quiz", "title": "Fra Angelico's Annunciation (quiz)", "description": "Test your knowledge.", "slug": "fra-angelico-s-annunciation-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/paolo-uccello-battle-of-san-romano-c-1538-40/", "id": "p8Vasl3L5p8", "title": "Uccello, The Battle of San Romano", "kind": "Video", "description": "Paolo Uccello's Battle of San Romano, probably c. 1438-40 in the National Gallery, London Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "paolo-uccello-battle-of-san-romano-c-1538-40"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/fra-filippo-lippi-madonna-and-child-with-two-angels-c-1460-1465/", "id": "Ly2-n1KqNko", "title": "Fra Filippo Lippi, Madonna and Child with two Angels", "kind": "Video", "description": "Fra Filippo Lippi, Madonna and Child with two Angels, c. 1460-1465, tempera on panel, 95 x 63.5 cm (Galleria degli Uffizi, Florence)", "slug": "fra-filippo-lippi-madonna-and-child-with-two-angels-c-1460-1465"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/lippi-s-madonna-and-child-with-two-angels-quiz/", "id": "lippi-s-madonna-and-child-with-two-angels-quiz", "title": "Lippi, Madonna and Child with two Angels (quiz)", "description": "Test your knowledge.", "slug": "lippi-s-madonna-and-child-with-two-angels-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/fra-filippo-lippi-madonna-and-child-c-1440/", "id": "049sSl4lEuk", "title": "Fra Filippo Lippi, Madonna and Child", "kind": "Video", "description": "Fra Filippo Lippi, Madonna and Child, c. 1440, tempera on panel, 79 x 51.1 cm / 31-1/8 x 20-1/8 inches (National Gallery of Art, Washington) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "fra-filippo-lippi-madonna-and-child-c-1440"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/fra-fillippo-lippi-portrait-of-a-man-and-woman-at-a-casement-c-1440/", "id": "wf8L9AZa2H4", "title": "Lippi, Portrait of a Man and Woman at a Casement", "kind": "Video", "description": "Fra Fillippo Lippi, Portrait of a Man and Woman at a Casement, tempera on wood, c. 1440 (Metropolitan Museum of Art) Speakers: Dr. David Drogin, Dr. Beth Harris", "slug": "fra-fillippo-lippi-portrait-of-a-man-and-woman-at-a-casement-c-1440"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/veneziano-saint-lucy-altarpiece-1445-47/", "id": "-yfjQGg-aMA", "title": "Veneziano, St. Lucy Altarpiece", "kind": "Video", "description": "Domenico Veneziano, Saint Lucy Altarpiece, 1445-47, tempera on wood panel, 82 1/4 x 85\" or 209 x 216 cm (Galleria degli Uffizi, Florence) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "veneziano-saint-lucy-altarpiece-1445-47"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/botticelli-la-primavera-spring-1481-1482/", "id": "qwZn852brII", "title": "Botticelli, Primavera", "kind": "Video", "description": "Botticelli, La Primavera (Spring), 1481-1482, tempera on panel, 80 x 123 1/2\" (203 x 314), Uffizi, Florence Speakers: Dr. Beth Harris and Dr. Steven Zucker http://khan.smarthistory.org/botticelli-primavera.html", "slug": "botticelli-la-primavera-spring-1481-1482"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/botticelli-the-birth-of-venus-1483-85/", "id": "tdp22elrY7s", "title": "Botticelli, Birth of Venus", "kind": "Video", "description": "Sandro Botticelli, The Birth of Venus, 1483-85, tempera on panel, 68 x 109 5/8\" (172.5 x 278.5 cm), Galeria degli Uffizi, Florence Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "botticelli-the-birth-of-venus-1483-85"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/botticelli-s-birth-of-venus-quiz/", "id": "botticelli-s-birth-of-venus-quiz", "title": "Botticelli, Birth of Venus (quiz)", "description": "Test your knowledge.", "slug": "botticelli-s-birth-of-venus-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/painting-in-florence/the-early-renaissance-in-florence/", "id": "the-early-renaissance-in-florence", "title": "The Early Renaissance in Florence (including painting, sculpture and architecture) (quiz)", "description": "Test your knowledge.", "slug": "the-early-renaissance-in-florence", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In the 15th century, Florence was a proud republic where political power resided in the hands of wealthy merchant families (such as the Medici who would later seize control of Florence) and powerful guilds (organizations of merchants and craftsmen). Importantly for art history, all of these groups commissioned poetry, painting, sculpture and architecture\u2014often as an expression of civic pride\u2014making Florence the leading city-state in Italy during the cultural epoch we call the Renaissance. In the last half of the fifteenth century, Florentine artists were invited to Rome, to work for patrons like Pope Sixtus IV who had artists like Perugino, Ghirlandaio and Botticelli fresco the walls of the Sistine Chapel, in the Vatican.", "node_slug": "painting-in-florence", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/early-renaissance1/painting-in-florence", "extended_slug": "humanities/renaissance-reformation/early-renaissance1/painting-in-florence", "kind": "Topic", "slug": "painting-in-florence"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/early-renaissance1/central-italy1/", "id": "central-italy1", "hide": false, "title": "Central Italy", "child_data": [{"kind": "Video", "id": "671711115"}, {"kind": "Exercise", "id": "x565b2aa9"}, {"kind": "Article", "id": "x62c86976"}, {"kind": "Article", "id": "xe4f2f9c3"}, {"kind": "Video", "id": "719474981"}, {"kind": "Exercise", "id": "xcd39d14a"}, {"kind": "Article", "id": "x55986394"}, {"kind": "Video", "id": "708141470"}], "children": [{"path": "khan/humanities/renaissance-reformation/early-renaissance1/central-italy1/piero-della-francesca-the-baptism-of-christ-1450s/", "id": "qv2K1yk0LCE", "title": "Piero della Francesca, The Baptism of Christ", "kind": "Video", "description": "Piero della Francesca, The Baptism of Christ, 1450s, tempera on wood, 167 x 116 cm (National Gallery, London). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "piero-della-francesca-the-baptism-of-christ-1450s"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/central-italy1/piero-della-francesca-s-baptism-of-christ-quiz/", "id": "piero-della-francesca-s-baptism-of-christ-quiz", "title": "Piero della Francesca, Baptism of Christ (quiz)", "description": "Test your knowledge.", "slug": "piero-della-francesca-s-baptism-of-christ-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/central-italy1/piero-della-francesca-portraits-of-the-duke-and-duchess-of-urbino-1467-72/", "id": "XIkryXkz8a4", "title": "Piero della Francesca, Portraits of the Duke and Duchess of Urbino", "kind": "Video", "description": "Piero della Francesca, Portraits of the Duke and Duchess of Urbino, Federico da Montefeltro and Battista Sforza, 1467-72, tempera on panel, 47 x 33 cm (Galleria degli Uffizi, Florence)", "slug": "piero-della-francesca-portraits-of-the-duke-and-duchess-of-urbino-1467-72"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/central-italy1/portraits-of-the-duke-and-duchess-of-urbino-quiz/", "id": "portraits-of-the-duke-and-duchess-of-urbino-quiz", "title": "Piero della Francesca, Portraits of the Duke and Duchess of Urbino (quiz)", "description": "Test your knowledge.", "slug": "portraits-of-the-duke-and-duchess-of-urbino-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/early-renaissance1/central-italy1/francesco-di-giorgio-martini-attributed-architectural-veduta-c-1490/", "id": "5wptm7lPZyE", "title": "Martini, Architectural Veduta", "kind": "Video", "description": "Francesco di Giorgio Martini (attributed), Architectural Veduta, c. 1490, oil on poplar, 131 x 233 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)", "slug": "francesco-di-giorgio-martini-attributed-architectural-veduta-c-1490"}], "in_knowledge_map": false, "description": "Beyond the city-states of Florence, Siena and Venice, artists like Piero della Francesca were busy creating among the most celebrated art of the Renaissance.", "node_slug": "central-italy1", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/early-renaissance1/central-italy1", "extended_slug": "humanities/renaissance-reformation/early-renaissance1/central-italy1", "kind": "Topic", "slug": "central-italy1"}], "in_knowledge_map": false, "description": "The engineering of Brunelleschi's dome, the naturalism of Donatello\u2019s David, and the humanism of Botticelli\u2019s Birth of Venus each help define the Early Renaissance in Italy.", "node_slug": "early-renaissance1", "render_type": "Topic", "topic_page_url": "/humanities/renaissance-reformation/early-renaissance1", "extended_slug": "humanities/renaissance-reformation/early-renaissance1", "kind": "Topic", "slug": "early-renaissance1"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/", "id": "high-ren-florence-rome", "hide": false, "title": "High Renaissance in Florence and Rome", "child_data": [{"kind": "Topic", "id": "x17c4bd68"}, {"kind": "Topic", "id": "xb4a4f5c6"}, {"kind": "Topic", "id": "xe336a017"}, {"kind": "Topic", "id": "x5f47c6eb"}, {"kind": "Topic", "id": "xff1b46b5"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/beginners-guide-high-ren/", "id": "beginners-guide-high-ren", "hide": false, "title": "A beginner's guide to the High Renaissance", "child_data": [{"kind": "Article", "id": "x2a483317"}, {"kind": "Video", "id": "671622659"}, {"kind": "Article", "id": "x0447d2cb"}, {"kind": "Article", "id": "xee57ac58"}], "children": [{"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/beginners-guide-high-ren/verrocchio-with-leonardo-baptism-of-christ-1470-75/", "id": "3YMEIjHl9og", "title": "Toward the high Renaissance: Verrocchio and Leonardo", "kind": "Video", "description": "Verrocchio (with Leonardo), Baptism of Christ, 1470-75 Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "verrocchio-with-leonardo-baptism-of-christ-1470-75"}], "in_knowledge_map": false, "description": "As the Humanism of the Early Renaissance develops, a problem arises. How can an artist create figures that are at once an accurate naturalistic rendering of the human body in space while also describing the ideal beauty of the spiritual realm?", "node_slug": "beginners-guide-high-ren", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/high-ren-florence-rome/beginners-guide-high-ren", "extended_slug": "humanities/renaissance-reformation/high-ren-florence-rome/beginners-guide-high-ren", "kind": "Topic", "slug": "beginners-guide-high-ren"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/", "id": "leonardo-da-vinci", "hide": false, "title": "Leonardo da Vinci", "child_data": [{"kind": "Article", "id": "xcf6eb1ca"}, {"kind": "Video", "id": "989036567"}, {"kind": "Video", "id": "x1973472d"}, {"kind": "Article", "id": "x67e6e7c2"}, {"kind": "Video", "id": "686594267"}, {"kind": "Article", "id": "x94547015"}, {"kind": "Video", "id": "671536486"}, {"kind": "Video", "id": "671691297"}, {"kind": "Video", "id": "671610551"}, {"kind": "Article", "id": "x12b7e672"}, {"kind": "Exercise", "id": "x80247907"}, {"kind": "Video", "id": "1229076967"}, {"kind": "Article", "id": "xb16db9b0"}], "children": [{"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/leonarda-da-vinci-s-letter-to-the-duke-of-milan/", "id": "URcpchlTNBY", "title": "Leonardo da Vinci, Letter to the Duke of Milan", "kind": "Video", "description": "Leonardo da Vinci's Letter to the Duke of Milan Speaker: Dr. David Drogin", "slug": "leonarda-da-vinci-s-letter-to-the-duke-of-milan"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/leonardo-anatomist/", "id": "J9xUL5Yi_8M", "title": "Leonardo: Anatomist - by Nature Video", "kind": "Video", "description": "Nature Video was invited to Windsor Castle to see some of Leonardo da Vinci's anatomical drawings. The drawings show that Leonardo did more than dabble in the sciences; he carried out experiments and made staggering medical discoveries which could have transformed the study of anatomy in Europe -- had they not languished unpublished for centuries. In this video, Senior Curator Martin Clayton shows us three of Leonardo's most intriguing anatomical studies.", "slug": "leonardo-anatomist"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/leonardo-da-vinci-the-virgin-of-the-rocks-c-1491-1508/", "id": "94xKRkCHlv0", "title": "Leonardo, Virgin of the Rocks", "kind": "Video", "description": "Leonardo da Vinci, The Virgin of the Rocks, c. 1491-1508, oil on panel, 189.5 x 120 cm\u00a0(The National Gallery, London)", "slug": "leonardo-da-vinci-the-virgin-of-the-rocks-c-1491-1508"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/leonardo-da-vinci-adoration-of-the-magi-1481-mov/", "id": "QxNqWZPzsGw", "title": "Leonardo, Adoration of the Magi", "kind": "Video", "description": "Leonardo da Vinci, Adoration of the Magi, 1481, oil on panel (Galleria degli Uffizi, Florence) http://smarthistory.khanacademy.org/leonardo-adoration-of-the-magi.html", "slug": "leonardo-da-vinci-adoration-of-the-magi-1481-mov"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/leonardo-the-virgin-and-child-with-st-anne-and-st-john-the-baptist-1499-1500/", "id": "L4F2lgyi7FA", "title": "Leonardo, Virgin and Child with St Anne and St John the Baptist (Burlington House Cartoon)", "kind": "Video", "description": "Leonardo da Vinci, The Virgin and Child with St Anne and St John the Baptist (Burlington House Cartoon), 1499-1500, charcoal and chalk on paper, 55.7 \u00d7 41.2 inches \nc. 1499-1500 (National Gallery, London)\n\nhttp://www.smarthistory.org/the-virgin-and-child-with-st-anne-and-st-john-the-baptist.html", "slug": "leonardo-the-virgin-and-child-with-st-anne-and-st-john-the-baptist-1499-1500"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/leonardo-da-vinci-last-supper-1495-98/", "id": "iV6_wTrkd70", "title": "Leonardo, Last Supper", "kind": "Video", "description": "Leonardo da Vinci, Last Supper, oil, tempera, fresco, 1495-98 (Santa Maria delle Grazie, Milan) Speakers: Dr. Beth Harris, Dr. Steven Zucker http://smarthistory.org/leonardo-last-supper.html", "slug": "leonardo-da-vinci-last-supper-1495-98"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/leonardo-s/", "id": "leonardo-s", "title": "Leonardo, Last Supper (quiz)", "description": "Test your knowledge.", "slug": "leonardo-s", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci/celebrity-art-leonardo-s-mona-lisa/", "id": "3kQ_p2EZX4Q", "title": "Leonardo, Mona Lisa", "kind": "Video", "description": "Salman Khan and Beth Harris discuss Leonardo da Vinci's painting, \"Mona Lisa,\" as a symbol of Western culture and as a renaissance portrait.", "slug": "celebrity-art-leonardo-s-mona-lisa"}], "in_knowledge_map": false, "description": "", "node_slug": "leonardo-da-vinci", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci", "extended_slug": "humanities/renaissance-reformation/high-ren-florence-rome/leonardo-da-vinci", "kind": "Topic", "slug": "leonardo-da-vinci"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/", "id": "michelangelo", "hide": false, "title": "Michelangelo", "child_data": [{"kind": "Article", "id": "x6034154b"}, {"kind": "Article", "id": "x88428b42"}, {"kind": "Video", "id": "671459940"}, {"kind": "Video", "id": "671610552"}, {"kind": "Article", "id": "x78aa4e4c"}, {"kind": "Video", "id": "873097408"}, {"kind": "Video", "id": "x81fc9897"}, {"kind": "Video", "id": "671632339"}, {"kind": "Article", "id": "xd339fb46"}, {"kind": "Video", "id": "671691295"}, {"kind": "Article", "id": "xf6841137"}, {"kind": "Video", "id": "x22e21ebf"}, {"kind": "Exercise", "id": "xe3c87f2b"}, {"kind": "Article", "id": "x2ede2a42"}, {"kind": "Video", "id": "671536493"}, {"kind": "Video", "id": "671702329"}, {"kind": "Article", "id": "xd1f2d739"}], "children": [{"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/michelangelo-piet-1498-1500/", "id": "JbWGusfynCw", "title": "Michelangelo, Piet\u00e0", "kind": "Video", "description": "Michelangelo, Piet\u00e0, marble, 1498-1500 (Saint Peter's Basilica, Rome) Speakers: Dr. Beth Harris and Dr. Steven Zucker.\n\nThe\u00a0Piet\u00e0\u00a0was a popular subject among northern european artists. It means Pity or Compassion, and represents Mary sorrowfully contemplating the dead body of her son which she holds on her lap. This sculpture was commissioned by a French Cardinal living in Rome.\nLook closely and see how Michelangelo made marble seem like flesh, and look at those complicated folds of drapery. It is important here to remember how sculpture is made. It was a messy, rather loud process (which is one of the reasons that Leonardo claimed that painting was superior to sculpture!). Just like painters often mixed their own paint, Michelangelo forged many of his own tools, and often participated in the quarrying of his marble -- a dangerous job.\n\nWhen we look at the extraordinary representation of the human body here we remember that Michelangelo, like Leonardo before him, had dissected cadavers to understand how the body worked.", "slug": "michelangelo-piet-1498-1500"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/michelangelo-moses-ca-1513-15/", "id": "pnBbFIxCIGw", "title": "Michelangelo, Moses", "kind": "Video", "description": "Michelangelo, Moses, marble, ca. 1513-15 (San Pietro in Vincoli, Rome) Speakers: Dr. Beth Harris, Dr. Steven Zucker. \u00a0\n\nUsually considered unfinished, these sculptures were originally intended for\u00a0\nthe tomb of Pope Julius II. According to the Louvre, the artist gave the marbles\u00a0\n\nto Roberto Strozzi who presented them to the King of France.", "slug": "michelangelo-moses-ca-1513-15"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/michelangelo-david-marble-1501-04-galleria-dell-accademia-florence/", "id": "-oXAekrYytA", "title": "Michelangelo, David", "kind": "Video", "description": "Michelangelo, David, marble, 1501-04 (Galleria dell'Accademia, Florence) A conversation with Khan Academy's Dr. Steven Zucker and Dr. Beth Harris.\n\nHis perfect beauty reminds me of Pico della Mirandola, who imagines God saying to man at the creation, \u201cThou shalt have the power out of thy soul\u2019s judgment to be reborn into the higher forms which are divine.\u201d\nHere is Vasari\u2019s description of David,\n\n\u2026nor has there ever been seen a pose so easy, or any grace to equal that in this work, or feet, hands and head so well in accord, one member with another, in harmony, design, and excellence of artistry. (Translated by Gaston du C. de Vere)\n\nMichelangelo\u2019s David stands nearly 17 feet tall. \u00a0Remember that the biblical figure of David was special to the citizens of Florence\u2014he symbolized the liberty and freedom of their republican ideals, which were threatened at various points in the fifteenth century by the Medici family and others. Watch a video about the importance of the figure of David for Florence.", "slug": "michelangelo-david-marble-1501-04-galleria-dell-accademia-florence"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/carving-marble-with-traditional-tools/", "id": "PWUuGDovHEI", "title": "Carving marble with traditional tools", "kind": "Video", "description": "Watch a sculptor demonstrate the use of traditional tools\u2014such as the tooth chisel, the point chisel, the drill, and the rasp\u2014as he creates a finished figure \u00a0from a block of marble. Love art? Follow us on Google+", "slug": "carving-marble-with-traditional-tools"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/michelangelo-the-dying-slave-and-the-rebellious-slave-1513-15/", "id": "h44bnIGogu8", "title": "Michelangelo, Slaves", "kind": "Video", "description": "Michelangelo, The Slaves (commonly referred to as the Dying Slave and the Rebellious Slave), marble, 2.09 m high, 1513-15 (Mus\u00e9e du Louvre, Paris)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nUsually considered unfinished, these sculptures were originally intended for the tomb of Pope Julius II. According to the Louvre, the artist gave the marbles to Roberto Strozzi who presented them to the King of France.", "slug": "michelangelo-the-dying-slave-and-the-rebellious-slave-1513-15"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/michelangelo-ceiling-of-the-sistine-chapel-1508-12/", "id": "PEE3B8Fsuc0", "title": "Michelangelo, Ceiling of the Sistine Chapel", "kind": "Video", "description": "Michelangelo, Ceiling of the Sistine Chapel, 1508-12, fresco (Vatican, Rome) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "michelangelo-ceiling-of-the-sistine-chapel-1508-12"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/thinking-aloud/", "id": "ICQCUTiC0mI", "title": "Michelangelo, Studies for the Libyan Sibyl (recto); Studies for the Libyan Sibyl and a small Sketch for a Seated Figure (verso)", "kind": "Video", "description": "Met curator Carmen Bambach on the presence of genius in Michelangelo Buonarroti\u2019s Studies for the Libyan Sibyl (recto); Studies for the Libyan Sibyl and a small Sketch for a Seated Figure (verso),\u00a0\u00a0c.\u00a01510\u201311.\n\nThis is the most magnificent drawing by Michelangelo in the United States. A male studio assistant posed for the anatomical study, which was preparatory for the Libyan Sibyl, one of the female seers frescoed on the ceiling of the Sistine Chapel (Vatican Palace) in 1508-12. In the fresco, the figure is clothed except for her powerful shoulders and arms, and has an elaborately braided coiffure. Michelangelo used the present sheet to explore the elements that were crucial in the elegant resolution of the figure's pose, especially the counterpoint twist of shoulders and hips and the manner of weight-bearing on her toe. Recent research shows that this sheet of studies was owned by the Buonarroti family soon after Michelangelo's death. The \"no. 21\" inscribed on the verso of the sheet (at lower center) fits precisely into a numerical sequence found on many other drawings by the artist that have this early Buonarroti family provenance.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "thinking-aloud"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/michelangelo-s-ceiling-of-the-sistine-chapel-quiz/", "id": "michelangelo-s-ceiling-of-the-sistine-chapel-quiz", "title": "Michelangelo, Ceiling of the Sistine Chapel Quiz", "description": "This quiz is for the video Michelangelo, ceiling of the Sistine Chapel.", "slug": "michelangelo-s-ceiling-of-the-sistine-chapel-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/michelangelo-last-judgment-sistine-chapel-ceiling-1628-1629/", "id": "c2MuTvQM61Y", "title": "Michelangelo, Last Judgment (altar wall, Sistine Chapel)", "kind": "Video", "description": "Michelangelo, Last Judgment, Sistine Chapel Ceiling, fresco, 1534-1541 (Vatican City, Rome) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "michelangelo-last-judgment-sistine-chapel-ceiling-1628-1629"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo/michelangelo-laurentian-library-1524-71/", "id": "tUOKkeEOkXk", "title": "Michelangelo, Laurentian Library", "kind": "Video", "description": "Michelangelo, Laurentian Library (vestibule and reading room), begun 1524, opened 1571, \nSan Lorenzo, Florence", "slug": "michelangelo-laurentian-library-1524-71"}], "in_knowledge_map": false, "description": "", "node_slug": "michelangelo", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/high-ren-florence-rome/michelangelo", "extended_slug": "humanities/renaissance-reformation/high-ren-florence-rome/michelangelo", "kind": "Topic", "slug": "michelangelo"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/", "id": "high-renaissance1", "hide": false, "title": "Raphael", "child_data": [{"kind": "Article", "id": "xe7492c4a"}, {"kind": "Video", "id": "xe3596d97"}, {"kind": "Video", "id": "671260996"}, {"kind": "Video", "id": "671539959"}, {"kind": "Video", "id": "671610553"}, {"kind": "Exercise", "id": "x58140ac9"}, {"kind": "Video", "id": "671622660"}, {"kind": "Video", "id": "671536492"}, {"kind": "Video", "id": "988781648"}, {"kind": "Article", "id": "xe84143ac"}], "children": [{"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-marriage-of-the-virgin-1504/", "id": "H_Guv2Mk1E0", "title": "Raphael, Marriage of the Virgin, 1504", "kind": "Video", "description": "Raphael's Marriage of the Virgin, 1504, oil on panel, 174 cm \u00d7 121 cm / 69 in \u00d7 48 in (Pinacoteca di Brera, Milan) \n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "raphael-marriage-of-the-virgin-1504"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-madonna-of-the-goldfinch-1505-6/", "id": "jHN0BfowL7s", "title": "Raphael, Madonna of the Goldfinch", "kind": "Video", "description": "Raphael, Madonna of the Goldfinch, 1505-6, oil on panel, 42\" x 30\" (107 x 77 cm), Uffizi, Florence\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "raphael-madonna-of-the-goldfinch-1505-6"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-italian-la-belle-jardini-re-also-madonna-and-child-with-saint-john-the-baptist-1507/", "id": "sv9CHsd546Q", "title": "Raphael, La belle jardini\u00e8re", "kind": "Video", "description": "Raphael (Italian), La belle jardini\u00e8re (also, Madonna and Child with Saint John the Baptist), 1507, oil on panel, 48 \u00d7 31\u00bd in (122 \u00d7 80 cm, Mus\u00e9e du Louvre, Paris)\n\nSpeakers: Drs. Beth Harris and Steven Zucker", "slug": "raphael-italian-la-belle-jardini-re-also-madonna-and-child-with-saint-john-the-baptist-1507"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-school-of-athens/", "id": "Smd-q44ysoM", "title": "Raphael, School of Athens", "kind": "Video", "description": "Raphael, School of Athens, fresco, 1509-1511 (Stanza della Segnatura, Papal Palace, Vatican)\n\nSpeakers: Dr. Steven Zucker, Dr. Beth Harris", "slug": "raphael-school-of-athens"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-s-school-of-athens-quiz/", "id": "raphael-s-school-of-athens-quiz", "title": "Raphael, School of Athens (quiz)", "description": "Test your knowledge.", "slug": "raphael-s-school-of-athens-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-alba-madonna-c-1510/", "id": "ln9VIRiocps", "title": "Raphael, Alba Madonna", "kind": "Video", "description": "Raphael, Alba Madonna, oil on panel transferred to canvas, c. 1510 (National Gallery of Art, Washington D.C.)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "raphael-alba-madonna-c-1510"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-portrait-of-pope-julius-ii-1511/", "id": "w6DDMwsyQaA", "title": "Raphael, Portrait of Pope Julius II", "kind": "Video", "description": "Raphael, Portrait of Pope Julius II, 1511, oil on poplar, 108.7 x 81 cm \n(National Gallery, London)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "raphael-portrait-of-pope-julius-ii-1511"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1/raphael-galatea-c-1513/", "id": "QEA30X4ysvg", "title": "Raphael, Galatea", "kind": "Video", "description": "Raphael, Galatea, c. 1513, fresco, Villa Farnesina, Rome, 9' 8\" x 7' 5\"", "slug": "raphael-galatea-c-1513"}], "in_knowledge_map": false, "description": "Leonardo, Michelangelo, Raphael, and Bramante. The High Renaissance was short lived but it changed the way we see ourselves.", "node_slug": "high-renaissance1", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1", "extended_slug": "humanities/renaissance-reformation/high-ren-florence-rome/high-renaissance1", "kind": "Topic", "slug": "high-renaissance1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/bramante/", "id": "bramante", "hide": false, "title": "Bramante", "child_data": [{"kind": "Video", "id": "916484864"}, {"kind": "Video", "id": "671632340"}, {"kind": "Article", "id": "xaff37dda"}, {"kind": "Exercise", "id": "xc04a7ae2"}], "children": [{"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/bramante/donato-bramante-tempietto-rome/", "id": "QXIXA4_5ehw", "title": "Bramante, Tempietto", "kind": "Video", "description": "Donato Bramante, Tempietto, c. 1502, San Pietro in Montorio, Rome", "slug": "donato-bramante-tempietto-rome"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/bramante/saint-peter-s-basilica-vatican-city-begun-1506-completed-1626/", "id": "R5UK0dEFSoM", "title": "Bramante, et.al., Saint Peter's Basilica", "kind": "Video", "description": "Numerous architects (see below), Saint Peter's Basilica (Basilica Sancti Petri in Latin)\nbegun 1506 completed 1626, Vatican City.\n\nArchitectural contributors include:\nDonato Bramante who's design won Julius II's competition\nAntonio da Sangallo, a student of Bramante, designed the Pauline Chapel\nFra Giocondo strengthened the foundation\nRaphael worked with Fra Giocondo, his redesigned building plan was not executed\nMichelangelo designed the dome, crossing, and exterior excluding the nave and facade\nGiacomo della Porta, designed the cupola\nCarlo Maderno, extended Michelangelo's plan adding a nave and grand facade\nGian Lorenzo Bernini added the piazza, the Cathedra Petri, and the Baldacchino\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "saint-peter-s-basilica-vatican-city-begun-1506-completed-1626"}, {"path": "khan/humanities/renaissance-reformation/high-ren-florence-rome/bramante/the-high-renaissance-in-florence-and-rome/", "id": "the-high-renaissance-in-florence-and-rome", "title": "The High Renaissance in Florence and Rome", "description": "Test your knowledge of the High Renaissance in Florence and Rome.", "slug": "the-high-renaissance-in-florence-and-rome", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "bramante", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/high-ren-florence-rome/bramante", "extended_slug": "humanities/renaissance-reformation/high-ren-florence-rome/bramante", "kind": "Topic", "slug": "bramante"}], "in_knowledge_map": false, "description": "Michelangelo's Sistine Ceiling, Leonardo\u2019s Last Supper, and Raphael's Stanza frescos shape our understanding of Western culture even today.", "node_slug": "high-ren-florence-rome", "render_type": "Topic", "topic_page_url": "/humanities/renaissance-reformation/high-ren-florence-rome", "extended_slug": "humanities/renaissance-reformation/high-ren-florence-rome", "kind": "Topic", "slug": "high-ren-florence-rome"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/renaissance-venice/", "id": "renaissance-venice", "hide": false, "title": "The Renaissance in Venice", "child_data": [{"kind": "Topic", "id": "x666e159c"}, {"kind": "Topic", "id": "xf5804d4a"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/", "id": "venice-early-ren", "hide": false, "title": "Early Renaissance in Venice", "child_data": [{"kind": "Article", "id": "1333371404"}, {"kind": "Video", "id": "xaa9ddfd6"}, {"kind": "Article", "id": "xfd7f8fb0"}, {"kind": "Article", "id": "xda4eaf86"}, {"kind": "Video", "id": "841519696"}, {"kind": "Video", "id": "xff5039fb"}, {"kind": "Video", "id": "x5c8c8962"}, {"kind": "Video", "id": "x18e4cee5"}, {"kind": "Video", "id": "671563214"}, {"kind": "Video", "id": "671539947"}, {"kind": "Video", "id": "671422831"}, {"kind": "Video", "id": "669432580"}, {"kind": "Exercise", "id": "xbfb417b9"}], "children": [{"path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/oil-paint-in-venice/", "id": "lG6NWLxDbNo", "title": "Oil paint in Venice", "kind": "Video", "description": "A review of fresco and tempera and the development of the use of\u00a0oil paint by artists in Venice.", "slug": "oil-paint-in-venice"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/giovanni-bellini-saint-francis-in-the-desert-circa-1480/", "id": "STs6h1qUSGs", "title": "Bellini, St. Francis", "kind": "Video", "description": "Giovanni Bellini, Saint Francis in the Desert, c. 1480, oil and tempera on poplar, 124.5 x 141.9 cm (The Frick Collection, New York) . View this work up close on the Google Art Project", "slug": "giovanni-bellini-saint-francis-in-the-desert-circa-1480"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/bellini-san-giobbe-altarpiece/", "id": "PxCTyVQMVbs", "title": "Bellini, San Giobbe Altarpiece", "kind": "Video", "description": "Giovanni Bellini, San Giobbe Altarpiece, c. 1485, oil on panel, 471 cm \u00d7 258 cm / 185 in \u00d7 102 in (Accademia, Venice) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "bellini-san-giobbe-altarpiece"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/giovanni-bellini-san-zaccaria-altarpiece-1505/", "id": "NCu83PcEQ1U", "title": "Giovanni Bellini, San Zaccaria Altarpiece", "kind": "Video", "description": "Giovanni Bellini, San Zaccaria Altarpiece, 1505, oil on wood transferred to canvas, 16 feet 5-1/2 inches x 7 feet 9 inches (San Zaccaria, Venice). Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "giovanni-bellini-san-zaccaria-altarpiece-1505"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/andrea-mantegna-san-zeno-altarpiece/", "id": "rTey6h4BQhc", "title": "Andrea Mantegna, San Zeno Altarpiece", "kind": "Video", "description": "Andrea Mantegna, San Zeno Altarpiece, 1456-59, oil on panel, 212 x 460 cm / 83 x 180 inches, comissioned by the Benedictine Abbot, Gregorio Correr (Basilica of San Zeno, Verona)", "slug": "andrea-mantegna-san-zeno-altarpiece"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/andrea-mantegna-saint-sebastian-c-1456-59/", "id": "y1_N1GAsS5I", "title": "Mantegna, Saint Sebastian", "kind": "Video", "description": "Andrea Mantegna, Saint Sebastian, oil on wood panel, ca. 1456-59 (Kunsthistorisches Museum, Vienna) Speakers: Dr. Beth Harris, Dr. Steven Zucker For more art history videos, visit Smarthistory.org", "slug": "andrea-mantegna-saint-sebastian-c-1456-59"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/mantegna-dormition-or-death-of-the-virgin-c-1462/", "id": "Du-0kAn4u6w", "title": "Mantegna, Dormition of the Virgin", "kind": "Video", "description": "Andrea Mantegna, Dormition (or Death) of the Virgin, c. 1462, tempera on panel, 54 \u00d7 42 cm, 21.26 \u00d7 16.54 in (Museo del Prado, Madrid)Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "mantegna-dormition-or-death-of-the-virgin-c-1462"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/andrea-mantegna-camera-degli-sposi-frescos-in-the-ducal-palace-mantua-1465-74/", "id": "GN0P5RkQAow", "title": "Mantegna, Camera degli Sposi", "kind": "Video", "description": "Andrea Mantegna, Camera degli Sposi (Frescos in the ducal palace, Mantua), 1465-74 Speakers: Beth Harris and David Drogin", "slug": "andrea-mantegna-camera-degli-sposi-frescos-in-the-ducal-palace-mantua-1465-74"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/mantegna-dead-christ-c-1490/", "id": "XGZvvQ8BmjY", "title": "Mantegna, Dead Christ", "kind": "Video", "description": "Andrea Mantegna, Dead Christ, tempera on canvas, c. 1480 - 1500 (Pinacoteca di Brera, Milan) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "mantegna-dead-christ-c-1490"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/venice-early-ren/renaissance-venice-in-the-1400s/", "id": "renaissance-venice-in-the-1400s", "title": "Renaissance Venice in the 1400s (quiz)", "description": "Test your knowledge.", "slug": "renaissance-venice-in-the-1400s", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "venice-early-ren", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/renaissance-venice/venice-early-ren", "extended_slug": "humanities/renaissance-reformation/renaissance-venice/venice-early-ren", "kind": "Topic", "slug": "venice-early-ren"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/", "id": "late-renaissance-venice", "hide": false, "title": "Late Renaissance in Venice", "child_data": [{"kind": "Video", "id": "x518e582a"}, {"kind": "Video", "id": "1327610976"}, {"kind": "Video", "id": "1064641631"}, {"kind": "Video", "id": "671536488"}, {"kind": "Article", "id": "x9f4869b5"}, {"kind": "Video", "id": "719842161"}, {"kind": "Video", "id": "xa4813afb"}, {"kind": "Video", "id": "x00089ddd"}, {"kind": "Video", "id": "671610555"}, {"kind": "Video", "id": "719832193"}, {"kind": "Exercise", "id": "x2eb612b5"}, {"kind": "Video", "id": "1245418600"}, {"kind": "Video", "id": "x9c82857e"}, {"kind": "Video", "id": "956722642"}, {"kind": "Article", "id": "x73e22794"}, {"kind": "Video", "id": "719832192"}, {"kind": "Video", "id": "719682567"}, {"kind": "Video", "id": "xdb9318cf"}, {"kind": "Article", "id": "x236bc733"}, {"kind": "Video", "id": "xdf23e21a"}, {"kind": "Video", "id": "xb7940ccb"}, {"kind": "Video", "id": "719682568"}, {"kind": "Video", "id": "xa7b50cd2"}, {"kind": "Article", "id": "x8975e6f0"}, {"kind": "Exercise", "id": "x93453447"}], "children": [{"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/giorgione-the-tempest/", "id": "LFA_qmGuY2A", "title": "Giorgione, The Tempest", "kind": "Video", "description": "Giorgione, The Tempest, c. 1506-8 (Accademia, Venice) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "giorgione-the-tempest"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/giorgione-three-philosophers/", "id": "RD_Mh_SDz3s", "title": "Giorgione, Three Philosophers", "kind": "Video", "description": "Giorgione, Three Philosophers, c. 1506 (Kunsthistorisches Museum, Vienna) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "giorgione-three-philosophers"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/giorgione-the-adoration-of-the-shepherds-1505-10/", "id": "M0Nf2Osgwkc", "title": "Giorgione, the Adoration of the Shepherds", "kind": "Video", "description": "Giorgione, The Adoration of the Shepherds, 1505/1, oil on panel, 90.8 x 110.5 cm / 35 3/4 x 43 1/2 in. (National Gallery of Art, Washington D.C.) Speakers: Dr. Heather Horton and Dr. Mark Trowbridge", "slug": "giorgione-the-adoration-of-the-shepherds-1505-10"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/bellini-titian-feast-of-the-gods-1514-and-1529/", "id": "Mx59hYSFCeA", "title": "Bellini and Titian, the Feast of the Gods", "kind": "Video", "description": "Giovanni Bellini and Titian, The Feast of the Gods, 1514 and 1529, oil on canvas (National Gallery of Art) Speakers: Dr. Beth Harris, Dr. Steven Zucker\n\nPart of a mythological cycle painted by Titian and Giovanni Bellini and commissioned\u00a0by Alfonso d'Este, Duke of Ferrara that includes\u00a0Bacchus and Ariadne\u00a0and the\u00a0Andrians.\u00a0Originally hung in the\u00a0studiolo\u00a0or Camerini d'Alabastro of the Duke's Ferranese castle.", "slug": "bellini-titian-feast-of-the-gods-1514-and-1529"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-noli-me-tangere-c-1514/", "id": "Rw8XE6hvHBo", "title": "Titian, Noli me Tangere", "kind": "Video", "description": "Titian, Noli me Tangere, c. 1514, oil on canvas, 110.5 x 91.9 cm (The National Gallery, London)", "slug": "titian-noli-me-tangere-c-1514"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-assumption-of-the-virgin/", "id": "2MzPOrcsWB0", "title": "Titian, Assumption of the Virgin", "kind": "Video", "description": "Titian, Assumption of the Virgin, c. 1516-18, oil on wood, 22' 6\" x 11' 10\" (Santa Maria Gloriosa dei Frari, Venice) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "titian-assumption-of-the-virgin"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-madonna-of-the-pesaro-family/", "id": "-ngmZo-dvy4", "title": "Titian, Madonna of the Pesaro Family", "kind": "Video", "description": "Titian, Madonna of the Pesaro Family, 1519-26, oil on canvas, 16' x 9' (Santa Maria Gloriosa die Frari, Venice). Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "titian-madonna-of-the-pesaro-family"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-bacchus-and-ariadne-1523-24/", "id": "bYyxwxEqTQo", "title": "Titian, Bacchus and Ariadne", "kind": "Video", "description": "Titian, Bacchus and Ariadne, 1523-24, oil on canvas now atop board, 69-1/2 x 75 inches (National Gallery, London). Speakers: Dr. Beth Harris and Dr. Steven Zucker\u00a0\n\nPart of a mythological cycle painted by Titian and Giovanni Bellini and commissioned by Alfonso d'Este, Duke of Ferrara that includes The Feast of the Gods and the Andrians. Originally hung in the studiolo or Camerini d'Alabastro of the Duke's Ferranese castle.", "slug": "titian-bacchus-and-ariadne-1523-24"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-venus-of-urbino-1538/", "id": "qD6ct0VS15c", "title": "Titian, Venus of Urbino", "kind": "Video", "description": "Titian, Venus of Urbino, 1538, oil on canvas, 119.20 x 165.50 cm (Galleria degli Uffizi, Florence)", "slug": "titian-venus-of-urbino-1538"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-s-venus-of-urbino-quiz/", "id": "titian-s-venus-of-urbino-quiz", "title": "Titian's Venus of Urbino Quiz", "description": "Test your knowledge.", "slug": "titian-s-venus-of-urbino-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-christ-crowned-with-thorns-c-1570-76/", "id": "ZVUH4-Wsdwg", "title": "Titian, Christ Crowned with Thorns", "kind": "Video", "description": "Titian, Christ Crowned with Thorns, ca. 1570--76, oil on canvas, 280 \u00d7 182 cm. (Alte Pinakothek, Munich) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "titian-christ-crowned-with-thorns-c-1570-76"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/titian-pieta/", "id": "iNW6SYDmkDI", "title": "Titian, Pieta", "kind": "Video", "description": "Titian and Palma il Giovane, Piet\u00e0, c. 1570-76, oil on canvas, 11'6\" x 12'9\" (Galleria Dell'Accademia, Venice)", "slug": "titian-pieta"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/correggio-jupiter-and-io/", "id": "hrBMFNvvOBI", "title": "Correggio, Jupiter and Io", "kind": "Video", "description": "Correggio, Jupiter and Io, 1532-33, oil on canvas 163.5 x 70.5 cm (Kunsthistorisches Museum, Vienna)\u00a0Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\u00a0\n\nJupiter and Io\u00a0and the other canvases by Correggio discussed in the video,\u00a0The Rape\u00a0(Abduction)of Ganymede,\u00a0Dan\u00e4e, and\u00a0Leda and the Swan\u00a0illustrate stories from the poem\u00a0Metamorphoses\u00a0by the Roman poet Ovid. Metamorphoses is, of course about transformation, such as Jupiter becoming a swan, but it is also about love and is one of the most influential texts ever written. Below is a translated excerpt:\n\nOvid's Metamorphoses: Book I, lines 587-600\u00a0\n\nJupiter first saw her returning from her father\u2019s stream, and said \u2018Virgin, worthy of Jupiter himself, who will make some unknown man happy when you share his bed, while it is hot and the sun is at the highest point of its arc, find shade in the deep woods! (and he showed her the woods\u2019 shade). But if you are afraid to enter the wild beasts\u2019 lairs, you can go into the remote woods in safety, protected by a god, and not by any lesser god, but by the one who holds the sceptre of heaven in his mighty hand, and who hurls the flickering bolts of lightning. Do not fly from me!\u2019 She was already in flight. She had left behind Lerna\u2019s pastures, and the Lyrcean plain\u2019s wooded fields, when the god hid the wide earth in a covering of fog, caught the fleeing girl, and raped her.\u00a0\n\nUniversity of Virginia etext, translation from the Latin by Anthony S. Kline, CC BY-NC\n\nPlease note, while the video relates the most broadly accepted understanding of the provenance of the painting\u00a0Jupiter and Io, little is certain, and competing theories do exist.", "slug": "correggio-jupiter-and-io"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/paolo-veronese-the-family-of-darius-before-alexander-1565-67/", "id": "YnYknwUqaCM", "title": "Veronese, The Family of Darius Before Alexander", "kind": "Video", "description": "Paolo Veronese, The Family of Darius before Alexander, 1565-67, oil on canvas, 236.2 x 474.9 cm (The National Gallery, London)", "slug": "paolo-veronese-the-family-of-darius-before-alexander-1565-67"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/paolo-veronese-the-dream-of-saint-helena-c-1570/", "id": "PI9DjVjeV2A", "title": "Veronese, the Dream of Saint Helena", "kind": "Video", "description": "Paolo Veronese, The Dream of Saint Helena, c. 1570, oil on canvas, 197.5 x 115.6 cm (The National Gallery, London)", "slug": "paolo-veronese-the-dream-of-saint-helena-c-1570"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/paolo-veronese-feast-in-the-house-of-levi-1573/", "id": "9g-r2007Y8c", "title": "Paolo Veronese. Feast in the House of Levi", "kind": "Video", "description": "Paolo Veronese, Feast in the House of Levi, 1573, oil on canvas, 18 feet 3 inches x 42 feet, Accademia, Venice Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "paolo-veronese-feast-in-the-house-of-levi-1573"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/jacopo-tintoretto-the-miracle-of-the-slave/", "id": "e41Wh7jhoxc", "title": "Tintoretto, the Miracle of the Slave", "kind": "Video", "description": "Jacopo Tintoretto, The Miracle of the Slave, 1548, oil on canvas, 415 x 541 cm (Accademia, Venice)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "jacopo-tintoretto-the-miracle-of-the-slave"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/tintoretto-finding-mark/", "id": "x3GFqNYaVRE", "title": "Tintoretto, The Finding of the Body of Saint Mark", "kind": "Video", "description": "Jacopo Tintoretto, The Finding of the Body of Saint Mark, c. 1562-66, oil on canvas, 396 x 400 cm (Pinacoteca di Brera, Milan)\u00a0Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "tintoretto-finding-mark"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/jacopo-tintoretto-the-origin-of-the-milky-way-c-1575/", "id": "Bgrwohxf9Ws", "title": "Tintoretto, the Origin of the Milky Way", "kind": "Video", "description": "Jacopo Tintoretto, The Origin of the Milky Way, c. 1575, oil on canvas, 149.4 x 168 cm (The National Gallery, London)", "slug": "jacopo-tintoretto-the-origin-of-the-milky-way-c-1575"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/jacopo-tintoretto-last-supper/", "id": "YhsjS5CtCTE", "title": "Tintoretto, Last Supper", "kind": "Video", "description": "Jacopo Tintoretto, Last Supper, 1594, oil on canvas, 12 x 18 feet, 8 inches (San Giorgio Maggiore, Venice) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "jacopo-tintoretto-last-supper"}, {"path": "khan/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice/the-renaissance-in-venice-in-the-1500s/", "id": "the-renaissance-in-venice-in-the-1500s", "title": "The Renaissance in Venice in the 1500s", "description": "Test your knowledge!", "slug": "the-renaissance-in-venice-in-the-1500s", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Venetian painters pursued innovative compositional approaches and introduced new subjects, such as landscape and the female nude. In the Late Renaissance, Titian\u2019s mastery was rivaled by Tintoretto and Veronese. Each attempted to out-paint the other with increasingly dynamic and sensual subjects for local churches and international patrons.", "node_slug": "late-renaissance-venice", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice", "extended_slug": "humanities/renaissance-reformation/renaissance-venice/late-renaissance-venice", "kind": "Topic", "slug": "late-renaissance-venice"}], "in_knowledge_map": false, "description": "Petrarch called Venice a \"mundus alter\u201d\u2014another world. Here Bellini, Giorgione, and Titian made art as brilliant as the light that plays off the city's canals.", "node_slug": "renaissance-venice", "render_type": "Topic", "topic_page_url": "/humanities/renaissance-reformation/renaissance-venice", "extended_slug": "humanities/renaissance-reformation/renaissance-venice", "kind": "Topic", "slug": "renaissance-venice"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/protestant-reformation1/", "id": "protestant-reformation1", "hide": false, "title": "Reformation and Counter-Reformation", "child_data": [{"kind": "Article", "id": "xf26aa3cd"}, {"kind": "Video", "id": "xb1a832b2"}, {"kind": "Video", "id": "x20184df0"}, {"kind": "Video", "id": "xf4983822"}, {"kind": "Video", "id": "x66fe4fa1"}, {"kind": "Article", "id": "x892579e3"}, {"kind": "Exercise", "id": "x7829049c"}, {"kind": "Exercise", "id": "xcd5a925c"}], "children": [{"path": "khan/humanities/renaissance-reformation/protestant-reformation1/protestant-reformation-1/", "id": "qTGJMnTWrrw", "title": "Introduction to the Protestant Reformation: Setting the stage (part 1)", "kind": "Video", "description": "Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "protestant-reformation-1"}, {"path": "khan/humanities/renaissance-reformation/protestant-reformation1/introduction-to-the-protestant-reformation-luther-2-of-4/", "id": "dSOnLt3YVl0", "title": "Introduction to the Protestant Reformation: Martin Luther (part 2)", "kind": "Video", "description": "An Introduction to the Protestant Reformation: Martin Luther (2 of 4) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "introduction-to-the-protestant-reformation-luther-2-of-4"}, {"path": "khan/humanities/renaissance-reformation/protestant-reformation1/introduction-to-the-protestant-reformation-3-of-4/", "id": "F6ZsIyKHTNI", "title": "Introduction to the Protestant Reformation: Varieties of Protestantism (part 3)", "kind": "Video", "description": "An Introduction to the Protestant Reformation: Varieties of Protestantism (3 of 4)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "introduction-to-the-protestant-reformation-3-of-4"}, {"path": "khan/humanities/renaissance-reformation/protestant-reformation1/introduction-to-the-protestant-reformation-the-counter-reformation-4-of-4/", "id": "C6PUlTYnxLY", "title": "Introduction to the Protestant Reformation: The Counter-Reformation (part 4)", "kind": "Video", "description": "Introduction to the Protestant Reformation: The Counter-Reformation (4 of 4) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "introduction-to-the-protestant-reformation-the-counter-reformation-4-of-4"}, {"path": "khan/humanities/renaissance-reformation/protestant-reformation1/cranach-s-law-and-gospel-quiz/", "id": "cranach-s-law-and-gospel-quiz", "title": "Cranach, Law and Gospel (quiz)", "description": "Test your knowledge.", "slug": "cranach-s-law-and-gospel-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/protestant-reformation1/protestant-reformation/", "id": "protestant-reformation", "title": "Protestant Reformation", "description": "Test your knowledge!", "slug": "protestant-reformation", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Why are there so many Protestant denominations (Baptist, Presbyterian, Pentecostal, etc.)? The early 16th century, a time when the Roman Catholicism was largely unchallenged in Western Europe, holds the answer.", "node_slug": "protestant-reformation1", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/protestant-reformation1", "extended_slug": "humanities/renaissance-reformation/protestant-reformation1", "kind": "Topic", "slug": "protestant-reformation1"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/northern/", "id": "northern", "hide": false, "title": "Northern Renaissance: the sixteenth century", "child_data": [{"kind": "Topic", "id": "x6c194952"}, {"kind": "Topic", "id": "x7deeb411"}, {"kind": "Topic", "id": "xce929b6d"}, {"kind": "Topic", "id": "x1106e292"}, {"kind": "Topic", "id": "xe06f4711"}, {"kind": "Topic", "id": "xe6c76205"}, {"kind": "Topic", "id": "xbe3a4c35"}, {"kind": "Topic", "id": "x847403d7"}, {"kind": "Topic", "id": "xc4d0c490"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/northern/england-france-tyrol/", "id": "england-france-tyrol", "hide": false, "title": "Pacher and Gr\u00fcnewald", "child_data": [{"kind": "Video", "id": "1258345468"}, {"kind": "Article", "id": "x012e0e44"}, {"kind": "Exercise", "id": "xd90d5593"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern/england-france-tyrol/pacher-st-wolfgang-altarpiece-c-1479-8/", "id": "KdDIIYqXmjw", "title": "Pacher, St. Wolfgang Altarpiece", "kind": "Video", "description": "Michael Pacher, St. Wolfgang Altarpiece, c. 1479-81 (Church of St. Wolfgang, St. Wolfgang, Austria) Speakers: Dr. Steven Zucker & Dr. Beth Harris. Find related images here.", "slug": "pacher-st-wolfgang-altarpiece-c-1479-8"}, {"path": "khan/humanities/renaissance-reformation/northern/england-france-tyrol/isenheim-altarpiece-quiz/", "id": "isenheim-altarpiece-quiz", "title": "Gr\u00fcnewald, Isenheim Altarpiece (quiz)", "description": "Test your knowledge.", "slug": "isenheim-altarpiece-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "england-france-tyrol", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern/england-france-tyrol", "extended_slug": "humanities/renaissance-reformation/northern/england-france-tyrol", "kind": "Topic", "slug": "england-france-tyrol"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/renaissance-reformation/northern/hieronymus-bosch/", "id": "hieronymus-bosch", "hide": false, "title": "Hieronymus Bosch", "child_data": [{"kind": "Article", "id": "x6725768a"}, {"kind": "Video", "id": "882352990"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern/hieronymus-bosch/bosch-last-judgment-triptych-1504-08/", "id": "Ea6qS3nuvng", "title": "Bosch, the Last Judgment", "kind": "Video", "description": "Hieronymus Bosch, Last Judgment Triptych, 1504-08, Akademie f\u00fcr bildenden K\u00fcnste, Vienna, overall dimensions 163 x 250 cm, central panel 163 x 128 cm, wings 163 x 60 cm. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "bosch-last-judgment-triptych-1504-08"}], "in_knowledge_map": false, "description": "", "node_slug": "hieronymus-bosch", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern/hieronymus-bosch", "extended_slug": "humanities/renaissance-reformation/northern/hieronymus-bosch", "kind": "Topic", "slug": "hieronymus-bosch"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/northern/durer/", "id": "durer", "hide": false, "title": "Albrecht D\u00fcrer", "child_data": [{"kind": "Article", "id": "xc2af97a1"}, {"kind": "Video", "id": "x790e27b8"}, {"kind": "Video", "id": "671536491"}, {"kind": "Video", "id": "1168548600"}, {"kind": "Exercise", "id": "xc2e33ff3"}, {"kind": "Article", "id": "xf2426a19"}, {"kind": "Video", "id": "708175161"}, {"kind": "Video", "id": "xd7b79398"}, {"kind": "Article", "id": "x9d60c205"}, {"kind": "Article", "id": "xefd9fe90"}, {"kind": "Video", "id": "1159799179"}, {"kind": "Exercise", "id": "xe8c6f5e0"}, {"kind": "Video", "id": "671536487"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern/durer/tipping-point/", "id": "_6uAjslPNuU", "title": "D\u00fcrer, Self-portrait, Study of a Hand and a Pillow", "kind": "Video", "description": "Met curator Stijn Alsteens on observation in Albrecht D\u00fcrer\u2019s Self-portrait, Study of a Hand and a Pillow (recto); Six Studies of Pillows (verso), 1493.\n\nView this work on metmuseum.org.", "slug": "tipping-point"}, {"path": "khan/humanities/renaissance-reformation/northern/durer/d-rer-self-portrait-1498/", "id": "OQEWArXaCeg", "title": "D\u00fcrer, Self-portrait (1498)", "kind": "Video", "description": "Albrecht D\u00fcrer, Self-portrait, 1498, oil on panel, 52 x 41 cm \n(Museo Nacional del Prado, Madrid)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nhttp://www.smarthistory.org/durer-self-portrait.html", "slug": "d-rer-self-portrait-1498"}, {"path": "khan/humanities/renaissance-reformation/northern/durer/albrecht-d-rer-self-portrait-1500/", "id": "ZoiY6ZLEKaY", "title": "D\u00fcrer, Self-portrait (1500)", "kind": "Video", "description": "Albrecht D\u00fcrer, Self-Portrait, 1500 (Alte Pinakothek, Munich) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "albrecht-d-rer-self-portrait-1500"}, {"path": "khan/humanities/renaissance-reformation/northern/durer/d-rer-s-self-portrait-quiz/", "id": "d-rer-s-self-portrait-quiz", "title": "D\u00fcrer, Self-portrait (quiz)", "description": "Test your knowledge.", "slug": "d-rer-s-self-portrait-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/northern/durer/albrecht-d-rer-the-large-piece-of-turf-1503/", "id": "znVEFfIdo1o", "title": "D\u00fcrer, the Large Piece of Turf", "kind": "Video", "description": "Albrecht D\u00fcrer, The Large Piece of Turf, 1503, watercolor and gouache on paper, 16-1/8 x 12-5/8 inches / 41 x 32 cm (Graphische Sammlung Albertina, Vienna)", "slug": "albrecht-d-rer-the-large-piece-of-turf-1503"}, {"path": "khan/humanities/renaissance-reformation/northern/durer/exposure/", "id": "12JdSg4pXIs", "title": "Albrecht D\u00fcrer, Adam and Eve", "kind": "Video", "description": "Met curator Freyda Spira on advertising in Albrecht D\u00fcrer\u2019s Adam and Eve, 1504.\n\nThroughout his life, D\u00fcrer was in thrall to the idea that the perfect human form corresponded to a system of proportion and measurements and could be generated by using such a system. Near the end of his life, he wrote several books codifying his theories, including the Underweysung der Messung (Manual of measurement), published in 1525, and Vier B\u00fccher von menschlichen Proportion (Four books of human proportion), published in 1528 just after his death. D\u00fcrer's fascination with ideal form is manifest in Adam and Eve. The first man and woman are shown in nearly symmetrical idealized poses: each with the weight on one leg, the other leg bent, and each with one arm angled slightly upward from the elbow and somewhat away from the body. The figure of Adam is reminiscent of the Hellenistic Apollo Belvedere, excavated in Italy late in the fifteenth century. The first engravings of the sculpture were not made until well after 1504, but D\u00fcrer must have seen a drawing of it. D\u00fcrer was a complete master of engraving by 1504: human and snake skin, animal fur, and tree bark and leaves are rendered distinctively. The branch Adam holds is of the mountain ash, the Tree of Life, while the fig, of which Eve has broken off a branch, is from the forbidden Tree of Knowledge. Four of the animals represent the medieval idea of the four temperaments: the cat is choleric, the rabbit sanguine, the ox phlegmatic, and the elk melancholic.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "exposure"}, {"path": "khan/humanities/renaissance-reformation/northern/durer/d-rer-the-four-apostles-1526/", "id": "WyNqLrb0LRE", "title": "D\u00fcrer, Four Apostles", "kind": "Video", "description": "Albrecht D\u00fcrer, The Four Apostles, 1526, oil on wood, 7' 1\" x 2' 6\" (Alte Pinakothek, Munich) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "d-rer-the-four-apostles-1526"}, {"path": "khan/humanities/renaissance-reformation/northern/durer/printmaking-woodcuts-and-engravings/", "id": "C3DmiEsvs6U", "title": "D\u00fcrer's woodcuts and engravings", "kind": "Video", "description": "Speakers: David Drogin and Beth Harris", "slug": "printmaking-woodcuts-and-engravings"}], "in_knowledge_map": false, "description": "", "node_slug": "durer", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern/durer", "extended_slug": "humanities/renaissance-reformation/northern/durer", "kind": "Topic", "slug": "durer"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/", "id": "antwerp-bruges", "hide": false, "title": "Antwerp, Bruges and Brussels", "child_data": [{"kind": "Video", "id": "719513884"}, {"kind": "Video", "id": "1317184181"}, {"kind": "Video", "id": "x69497a4e"}, {"kind": "Article", "id": "x0e861b8b"}, {"kind": "Video", "id": "708172142"}, {"kind": "Video", "id": "708141471"}, {"kind": "Video", "id": "xf48878fd"}, {"kind": "Exercise", "id": "x438ce575"}, {"kind": "Video", "id": "x6e23d7cb"}, {"kind": "Video", "id": "x8bab422b"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/gerard-david-the-virgin-and-child-with-saints-and-donor-c-1510/", "id": "9fiJ7mSzamw", "title": "David, the Virgin and Child with Saints and Donor", "kind": "Video", "description": "Gerard David, The Virgin and Child with Saints and Donor, c. 1510, oil on oak, 105.80 x 144.40 cm (The National Gallery, London)", "slug": "gerard-david-the-virgin-and-child-with-saints-and-donor-c-1510"}, {"path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/gossaert-saint-luke-painting-the-madonna/", "id": "q8cYGh-K6Ok", "title": "Gossaert, Saint Luke Painting the Madonna", "kind": "Video", "description": "Jan Gossaert, Saint Luke Painting the Madonna, c. 1515-25 (Kunsthistorisches Museum, Vienna) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "gossaert-saint-luke-painting-the-madonna"}, {"path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/breakthrough/", "id": "tdEF5cQzWms", "title": "Van Orley and de Pannemaker, The Last Supper", "kind": "Video", "description": "Met director Thomas P. Campbell on game changers in Bernard van Orley and Pieter de Pannemaker\u2019s The Last Supper,\u00a0c. 1524\u201346 (design), c. 1525\u201328 (woven).\n\nThis splendid Last Supper is part of a series of four tapestries illustrating the Passion of Christ. They were designed by Bernard van Orley, a leading artist in sixteenth-century Brussels, the preeminent center for tapestry manufacture in this period. The work exemplifies van Orley\u2019s integration of Northern traditions and Italian models to develop a new tapestry style. He combined the expressive emotion and penchant for detail found in Albrecht D\u00fcrer\u2019s Last Supper woodcut, which inspired the tapestry\u2019s compositional arrangement, with Raphael\u2019s monumental figures and spatial construction. Raphael\u2019s cartoons for the tapestry series Acts of the Apostles, commissioned for the Sistine Chapel and sent to Brussels to be woven, were significant models for van Orley and other Flemish artists, providing a paradigm of the grand, heroic narrative style of contemporary Roman art. In the Last Supper, populated by muscular, rhetorically gesturing figures engaged in a moment of high drama, van Orley fully realized tapestry's potential for emulating monumental painting.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, try this and also visit\u00a0Find an Educator Resource.", "slug": "breakthrough"}, {"path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/pieter-bruegel-the-elder-the-dutch-proverbs-1559/", "id": "mSPumIx85l8", "title": "Bruegel, the Dutch Proverbs", "kind": "Video", "description": "Pieter Bruegel the Elder,\u00a0The Dutch Proverbs, 1559, oil on oak, 117 x 163 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)\n\nSpeakers:\u00a0Dr. Beth Harris,\u00a0Dr. Steven Zucker", "slug": "pieter-bruegel-the-elder-the-dutch-proverbs-1559"}, {"path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/pieter-bruegel-the-elder-the-tower-of-babel-1563/", "id": "K6BKDveCd9w", "title": "Bruegel, Tower of Babel", "kind": "Video", "description": "Pieter Bruegel the Elder, The Tower of Babel, 1563, oil on panel, 114 \u00d7 155 cm (Kunsthistorisches Museum, Vienna). In the Google Art Project: http://www.googleartproject.com/collection/kunsthistorisches-museum-vienna-museum-of-fine-arts/artwork/the-tower-of-babel-pieter-bruegel-the-elder/807533/", "slug": "pieter-bruegel-the-elder-the-tower-of-babel-1563"}, {"path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/bruegel-hunters/", "id": "Pj3HdzOR2pY", "title": "Bruegel, Hunters in the Snow (Winter)", "kind": "Video", "description": "Pieter Bruegel the Elder, Hunters in the Snow (Winter), 1565, oil on wood, 118 x 161 cm (Kunsthistorisches Museum, Vienna),\u00a0Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "bruegel-hunters"}, {"path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/bruegel-s-hunters-in-the-snow-quiz/", "id": "bruegel-s-hunters-in-the-snow-quiz", "title": "Bruegel, Hunters in the Snow (quiz)", "description": "This is a quiz for the video Pieter Bruegel the Elder, Hunters in the Snow (Winter).", "slug": "bruegel-s-hunters-in-the-snow-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/bruegel-peasant-wedding/", "id": "G1Hs2GZKOhw", "title": "Pieter Bruegel the Elder's Peasant Wedding", "kind": "Video", "description": "oil on canvas, 114 x 164 cm (Kunsthistorisches Museum, Vienna)Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "bruegel-peasant-wedding"}, {"path": "khan/humanities/renaissance-reformation/northern/antwerp-bruges/st-ursula/", "id": "VEv7Mmx1V4w", "title": "Reliquary bust of a companion of Saint Ursula", "kind": "Video", "description": "Exhibition curator, James Robinson (video\u00a0from the British Museum), bust from the Metropolitan Museum of Art), c. 1520-30.\n\nThis beautiful woman is most likely intended to represent one of the companions of St Ursula. According to legend St Ursula was an English princess who decided to go on a holy pilgrimage before her marriage. The legend also states that she took with her 11,000 virgin companions as company for the journey.\n\nThe troop of 11,000 virgins travelled to Cologne, Basle and Rome and made their way home back through Cologne. It was here that they met with a group of pagan Huns, whose leader wanted to marry Ursula. Ursula being already engaged and a virgin refused! This made the Huns so angry that they murdered all 11,000 of the girls by arrow fire.\n\n11,000 virgins is certainly a large party \u2013 the legend of there being 11,000 virgins became fixed in the 10th century, but this was probably through a misunderstanding of a Latin numerical inscription which read 11 rather than 11,000! Once the legend took off it became incredibly popular and indeed provided much inspiration for medieval craftsmen to create objects such as this.\n\nThe \u2018door\u2019 in the centre of the head of this reliquary opens to reveal a cavity which once held a skull relic of this unknown female saint. \u00a9 Trustees of the British Museum", "slug": "st-ursula"}], "in_knowledge_map": false, "description": "", "node_slug": "antwerp-bruges", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern/antwerp-bruges", "extended_slug": "humanities/renaissance-reformation/northern/antwerp-bruges", "kind": "Topic", "slug": "antwerp-bruges"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/northern/cranach-altdorfer/", "id": "cranach-altdorfer", "hide": false, "title": "Cranach and Altdorfer", "child_data": [{"kind": "Video", "id": "1159627874"}, {"kind": "Video", "id": "671686562"}, {"kind": "Exercise", "id": "x34f59595"}, {"kind": "Video", "id": "719781802"}, {"kind": "Video", "id": "719624692"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern/cranach-altdorfer/altdorfer-the-battle-of-issus-1529/", "id": "K0qH8EwiH2g", "title": "Altdorfer, the Battle of Issus", "kind": "Video", "description": "Albrecht Altdorfer, The Battle of Issus, 1529, oil on panel, 158.4 \u00d7\u00a0120.3\u00a0cm, Alte Pinakothek, Munich. Speakers: Dr.Steven Zucker and Dr. Beth Harris", "slug": "altdorfer-the-battle-of-issus-1529"}, {"path": "khan/humanities/renaissance-reformation/northern/cranach-altdorfer/cranach-the-elder-adam-and-eve-1526/", "id": "g4XZGhnFOwM", "title": "Cranach, Adam and Eve", "kind": "Video", "description": "Lucus Cranach the Elder, Adam and Eve, 1526, oil on panel\u00a0(Courtauld Gallery, London).\u00a0\n\nSpeakers: Rachel Ropeik and Steven Zucker", "slug": "cranach-the-elder-adam-and-eve-1526"}, {"path": "khan/humanities/renaissance-reformation/northern/cranach-altdorfer/cranach-s-adam-and-eve-quiz/", "id": "cranach-s-adam-and-eve-quiz", "title": "Cranach's Adam and Eve (quiz)", "description": "Test your knowledge.", "slug": "cranach-s-adam-and-eve-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/northern/cranach-altdorfer/lucas-cranach-the-elder-cupid-complaining-to-venus-c-1525/", "id": "baifq1b1-i4", "title": "Cranach the Elder, Cupid complaining to Venus", "kind": "Video", "description": "Lucas Cranach the Elder, Cupid complaining to Venus, c. 1525, oil on wood, 81.3 x 54.6 cm (The National Gallery, London)", "slug": "lucas-cranach-the-elder-cupid-complaining-to-venus-c-1525"}, {"path": "khan/humanities/renaissance-reformation/northern/cranach-altdorfer/lucas-cranach-the-elder-judith-with-the-head-of-holofernes-c-1530/", "id": "jnxA293u8cs", "title": "Cranach the Elder, Judith with the Head of Holofernes", "kind": "Video", "description": "Lucas Cranach the Elder, Judith with the Head of Holofernes, c. 1530 (Kunsthistorisches Museum, Vienna)", "slug": "lucas-cranach-the-elder-judith-with-the-head-of-holofernes-c-1530"}], "in_knowledge_map": false, "description": "", "node_slug": "cranach-altdorfer", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern/cranach-altdorfer", "extended_slug": "humanities/renaissance-reformation/northern/cranach-altdorfer", "kind": "Topic", "slug": "cranach-altdorfer"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/renaissance-reformation/northern/holbein/", "id": "holbein", "hide": false, "title": "Hans Holbein", "child_data": [{"kind": "Video", "id": "719682566"}, {"kind": "Video", "id": "708126671"}, {"kind": "Video", "id": "719611779"}, {"kind": "Video", "id": "671686563"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern/holbein/hans-holbein-the-younger-the-ambassadors-1533/", "id": "PQZUIGzinZA", "title": "Holbein the Younger, the Ambassadors", "kind": "Video", "description": "Hans Holbein the Younger, The Ambassadors, 1533, oil on oak, 207 x 209.5 cm (The National Gallery, London). View this work up close on the Google Art Project.", "slug": "hans-holbein-the-younger-the-ambassadors-1533"}, {"path": "khan/humanities/renaissance-reformation/northern/holbein/hans-holbein-the-younger-the-merchant-georg-gisze-1532/", "id": "kK38qqvLQ2I", "title": "Holbein the Younger, the Merchant Georg Gisze", "kind": "Video", "description": "Hans Holbein the Younger, The Merchant Georg Gisze, 1532, oil on oak, 97.5 x 86.2 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)", "slug": "hans-holbein-the-younger-the-merchant-georg-gisze-1532"}, {"path": "khan/humanities/renaissance-reformation/northern/holbein/hans-holbein-the-younger-christina-of-denmark-duchess-of-milan-1538/", "id": "hJOU3EK085M", "title": "Holbein the Younger, Christina of Denmark", "kind": "Video", "description": "Hans Holbein the Younger, Christina of Denmark, Duchess of Milan, 1538, oil on oak, 179.1 x 82.6 cm (The National Gallery, London)", "slug": "hans-holbein-the-younger-christina-of-denmark-duchess-of-milan-1538"}, {"path": "khan/humanities/renaissance-reformation/northern/holbein/hans-holbein-the-younger-portrait-of-henry-viii-1540/", "id": "-wTI7EC-i30", "title": "Holbein the Younger, Henry VIII", "kind": "Video", "description": "Hans Holbein the Younger, Portrait of Henry VIII, 1540, oil on panel (Palazzo Barberini, Rome). Please note: there have been questions raised as to whether this painting is by Holbein or his workshop, or perhaps a later copy; recent research suggests that it is an original Holbein.", "slug": "hans-holbein-the-younger-portrait-of-henry-viii-1540"}], "in_knowledge_map": false, "description": "", "node_slug": "holbein", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern/holbein", "extended_slug": "humanities/renaissance-reformation/northern/holbein", "kind": "Topic", "slug": "holbein"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/renaissance-reformation/northern/england/", "id": "england", "hide": false, "title": "England", "child_data": [{"kind": "Video", "id": "x14c3bd4b"}, {"kind": "Video", "id": "xb04fe494"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern/england/the-harrowing-of-hell-c-1440-70/", "id": "katx69CGBwo", "title": "The Harrowing of Hell", "kind": "Video", "description": "The Harrowing of Hell, c. 1440-70, carved painted and gilt alabaster, 58.3 x 31.5 cm (Victoria and Albert Museum) Speakers: Dr. Nancy Ross and Dr. Paul Binski", "slug": "the-harrowing-of-hell-c-1440-70"}, {"path": "khan/humanities/renaissance-reformation/northern/england/room-1540-1650/", "id": "wLpOw8M7ucE", "title": "Room: 1540-1650", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Tim Batchelor explores the period 1540-1650.\n\nLearn more about the art featured in this video:\n- Marcus Gheeraerts II, Portrait of Captain Thomas Lee, 1594\n- Sir Nathaniel Bacon, Cookmaid with Still Life of Vegetables and Fruit, 1620\u20135\n- David Des Granges, The Saltonstall Family, 1636\u20137", "slug": "room-1540-1650"}], "in_knowledge_map": false, "description": "", "node_slug": "england", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern/england", "extended_slug": "humanities/renaissance-reformation/northern/england", "kind": "Topic", "slug": "england"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/renaissance-reformation/northern/northern-renaissance-1500s/", "id": "northern-renaissance-1500s", "hide": false, "title": "Quiz: The Northern Renaissance in the 16th century", "child_data": [{"kind": "Exercise", "id": "x2e894608"}], "children": [{"path": "khan/humanities/renaissance-reformation/northern/northern-renaissance-1500s/northern-renaissance-in-the-16th-century/", "id": "northern-renaissance-in-the-16th-century", "title": "Northern Renaissance in the 16th Century", "description": "Test your knowledge!", "slug": "northern-renaissance-in-the-16th-century", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "northern-renaissance-1500s", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/northern/northern-renaissance-1500s", "extended_slug": "humanities/renaissance-reformation/northern/northern-renaissance-1500s", "kind": "Topic", "slug": "northern-renaissance-1500s"}], "in_knowledge_map": false, "description": "Discover Gr\u00fcnewald, Bosch, D\u00fcrer, Bruegel, Holbein and other extraordinary artists from the Renaissance in England, German, Flanders, etc.", "node_slug": "northern", "render_type": "Topic", "topic_page_url": "/humanities/renaissance-reformation/northern", "extended_slug": "humanities/renaissance-reformation/northern", "kind": "Topic", "slug": "northern"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/renaissance-reformation/mannerism1/", "id": "mannerism1", "hide": false, "title": "Mannerism", "child_data": [{"kind": "Article", "id": "x698889a4"}, {"kind": "Video", "id": "671397709"}, {"kind": "Exercise", "id": "x5c4002f7"}, {"kind": "Video", "id": "671711116"}, {"kind": "Video", "id": "1159819095"}, {"kind": "Video", "id": "719746435"}, {"kind": "Video", "id": "x98f2557c"}, {"kind": "Video", "id": "719786820"}, {"kind": "Article", "id": "x57da1daa"}, {"kind": "Video", "id": "671702327"}, {"kind": "Video", "id": "671691294"}, {"kind": "Article", "id": "x24752a48"}, {"kind": "Article", "id": "x4acd53bc"}, {"kind": "Video", "id": "671707167"}, {"kind": "Exercise", "id": "x57cfff12"}], "children": [{"path": "khan/humanities/renaissance-reformation/mannerism1/pontormo-entombment-or-deposition-from-the-cross-1525-28/", "id": "ABhqENOxSrU", "title": "Pontormo, The Entombment of Christ", "kind": "Video", "description": "Pontormo, Entombment (or Deposition from the Cross), oil on panel, 1525-28 (Capponi Chapel, Santa Felicita, Florence) Speakers: Dr. Steven Zucker, Dr. Beth Harris", "slug": "pontormo-entombment-or-deposition-from-the-cross-1525-28"}, {"path": "khan/humanities/renaissance-reformation/mannerism1/pontormo-s-entombment-quiz/", "id": "pontormo-s-entombment-quiz", "title": "Pontormo, The Entombment of Christ (quiz)", "description": "This quiz is for the video Pontormo, The Entombment of Christ.", "slug": "pontormo-s-entombment-quiz", "kind": "Exercise"}, {"path": "khan/humanities/renaissance-reformation/mannerism1/parmigianino-madonna-of-the-long-neck-1530-33/", "id": "suIUUGdNyWk", "title": "Parmigianino, Madonna of the Long Neck", "kind": "Video", "description": "Parmigianino, Madonna of the Long Neck, 1530-33, 28 3/4 x 23 1/2\" (73 x 60), Uffizi, Florence Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "parmigianino-madonna-of-the-long-neck-1530-33"}, {"path": "khan/humanities/renaissance-reformation/mannerism1/parmigianino-self-portrait-in-a-convex-mirror-1523-24/", "id": "pfnX-zgXHBM", "title": "Parmigianino, Self-Portrait in a Convex Mirror", "kind": "Video", "description": "Francesco Mazzola, called Parmigianino, Self-Portrait in a Convex Mirror, 1523-24 (Kunsthistorisches Museum, Vienna) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "parmigianino-self-portrait-in-a-convex-mirror-1523-24"}, {"path": "khan/humanities/renaissance-reformation/mannerism1/rosso-fiorentino-the-dead-christ-with-angels-c-1524-7/", "id": "2lXL4HscWGI", "title": "Rosso Fiorentino, the Dead Christ with Angels", "kind": "Video", "description": "Rosso Fiorentino, The Dead Christ with Angels, c. 1524-7, oil on panel, 133.4 x 104.1 cm / 52-1/2 x 41 inches (Museum of Fine Arts, Boston)", "slug": "rosso-fiorentino-the-dead-christ-with-angels-c-1524-7"}, {"path": "khan/humanities/renaissance-reformation/mannerism1/bronzino-an-allegory-with-venus-and-cupid/", "id": "6w2E8G0sEPc", "title": "Bronzino, An Allegory with Venus and Cupid", "kind": "Video", "description": "Agnolo di Cosimo Bronzino, An Allegory with Venus and Cupid, c. 1545, oil on panel, 146.1 x 116.2 cm (National Gallery, London) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nThis passage by Vasari is most likely related to this canvas:\n\n\"And he painted a picture of singular beauty that was sent to King Francis in France, wherein was a nude Venus, with a Cupid who was kissing her, and Pleasure on one side with Play and other Loves, and on the other side Fraud and Jealousy and other passions of love.\" Giorgio Vasari,\u00a0Lives of the most Eminent Painters Sculptors and Architects,\u00a0volume 10, trans: Gaston du C. De Vere (London: Medici Society, 1912-15)", "slug": "bronzino-an-allegory-with-venus-and-cupid"}, {"path": "khan/humanities/renaissance-reformation/mannerism1/bronzino-portrait-of-eleonora-di-toledo-with-her-son-giovanni-1544-1545/", "id": "fpgvjMKCyAA", "title": "Bronzino, Portrait of Eleonora of Toledo with her son Giovanni", "kind": "Video", "description": "Bronzino, Portrait of Eleonora di Toledo with her son Giovanni, 1544-1545, oil on panel, 115 x 96 cm (Galleria degli Uffizi)", "slug": "bronzino-portrait-of-eleonora-di-toledo-with-her-son-giovanni-1544-1545"}, {"path": "khan/humanities/renaissance-reformation/mannerism1/bronzino-the-mannerist-portrait/", "id": "4mpFcaeElCs", "title": "Bronzino and the Mannerist Portrait", "kind": "Video", "description": "Bronzino\u00a0Portrait of a Young Man, oil on panel, 1530s (Metropolitan Museum of Art) and Bronzino, Lodovico Capponi, Oil on panel, 1550-55 (Frick Collection) Speakers: David Drogin and Beth Harris", "slug": "bronzino-the-mannerist-portrait"}, {"path": "khan/humanities/renaissance-reformation/mannerism1/benvenuto-cellini-perseus-with-the-head-of-medusa-c-1554/", "id": "Q1j-gPKAcDA", "title": "Cellini, Perseus", "kind": "Video", "description": "Benvenuto Cellini, Perseus with the Head of Medusa, c. 1554, bronze (Loggia dei Lanzi, Piazza della Signoria, Florence)", "slug": "benvenuto-cellini-perseus-with-the-head-of-medusa-c-1554"}, {"path": "khan/humanities/renaissance-reformation/mannerism1/el-greco-adoration-of-the-shepherds-c-1612-14/", "id": "3_-hYeuJTzQ", "title": "El Greco, Adoration of the Shepherds", "kind": "Video", "description": "El Greco (Domenikos Theotokopoulos), Adoration of the Shepherds, ca. 1612 - 1614, oil on canvas, 126 x 71 in. (319 x 180 cm), (Museo Nacional del Prado, Madrid) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "el-greco-adoration-of-the-shepherds-c-1612-14"}, {"path": "khan/humanities/renaissance-reformation/mannerism1/mannerism/", "id": "mannerism", "title": "Mannerism", "description": "Test your knowledge!", "slug": "mannerism", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The Mannerist style developed in the courts of the Italian elite. It built on Renaissance naturalism but distorts and deceives to delight its highly educated audience.", "node_slug": "mannerism1", "render_type": "Tutorial", "topic_page_url": "/humanities/renaissance-reformation/mannerism1", "extended_slug": "humanities/renaissance-reformation/mannerism1", "kind": "Topic", "slug": "mannerism1"}], "in_knowledge_map": false, "description": "1400-1600: Van Eyck, Michelangelo, Titian and more.", "node_slug": "renaissance-reformation", "render_type": "Subject", "topic_page_url": "/humanities/renaissance-reformation", "extended_slug": "humanities/renaissance-reformation", "kind": "Topic", "slug": "renaissance-reformation"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/", "id": "monarchy-enlightenment", "hide": false, "title": "Baroque, Rococo and Neoclassical art in Europe", "child_data": [{"kind": "Topic", "id": "x20767ed8"}, {"kind": "Topic", "id": "xd08c262e"}, {"kind": "Topic", "id": "xf9813705"}, {"kind": "Topic", "id": "xef336b54"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/baroque-art1/", "id": "baroque-art1", "hide": false, "title": "Baroque art", "child_data": [{"kind": "Topic", "id": "x2410872f"}, {"kind": "Topic", "id": "x1f7023a6"}, {"kind": "Topic", "id": "xea43dd8d"}, {"kind": "Topic", "id": "x0665628b"}, {"kind": "Topic", "id": "x51288d14"}, {"kind": "Topic", "id": "x23e591e8"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/monarchy-enlightenment/baroque-art1/beginners-guide-baroque1/", "id": "beginners-guide-baroque1", "hide": false, "title": "A beginner's guide to Baroque art", "child_data": [{"kind": "Article", "id": "xf2306eba"}, {"kind": "Article", "id": "x12499209"}, {"kind": "Exercise", "id": "x125cf259"}], "children": [{"path": "khan/humanities/monarchy-enlightenment/baroque-art1/beginners-guide-baroque1/a-beginner-s-guide-to-the-baroque/", "id": "a-beginner-s-guide-to-the-baroque", "title": "A beginner's guide to the Baroque (quiz)", "description": "Test your knowledge!", "slug": "a-beginner-s-guide-to-the-baroque", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Get a head start on the historical developments that shape Baroque art in the Catholic Italy, Spain, Flanders, France and in the Protestant north.", "node_slug": "beginners-guide-baroque1", "render_type": "Tutorial", "topic_page_url": "/humanities/monarchy-enlightenment/baroque-art1/beginners-guide-baroque1", "extended_slug": "humanities/monarchy-enlightenment/baroque-art1/beginners-guide-baroque1", "kind": "Topic", "slug": "beginners-guide-baroque1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/", "id": "baroque-italy", "hide": false, "title": "Italy", "child_data": [{"kind": "Video", "id": "671686564"}, {"kind": "Video", "id": "671610557"}, {"kind": "Article", "id": "x850d501e"}, {"kind": "Exercise", "id": "xdeba0495"}, {"kind": "Video", "id": "671686571"}, {"kind": "Video", "id": "xbb130795"}, {"kind": "Video", "id": "671632342"}, {"kind": "Video", "id": "671536496"}, {"kind": "Article", "id": "xc9460386"}, {"kind": "Exercise", "id": "xc26e7f9c"}, {"kind": "Video", "id": "671422833"}, {"kind": "Video", "id": "671610561"}, {"kind": "Video", "id": "762996397"}, {"kind": "Video", "id": "671686565"}, {"kind": "Video", "id": "671707168"}, {"kind": "Video", "id": "671686566"}, {"kind": "Video", "id": "671632341"}, {"kind": "Exercise", "id": "x06588fc4"}, {"kind": "Video", "id": "671610559"}, {"kind": "Video", "id": "671539969"}, {"kind": "Article", "id": "x917fd5e9"}, {"kind": "Video", "id": "671459943"}, {"kind": "Article", "id": "x11a9e141"}, {"kind": "Article", "id": "xc55598cf"}, {"kind": "Article", "id": "x7efa5548"}, {"kind": "Video", "id": "xddc4180c"}, {"kind": "Video", "id": "671707170"}, {"kind": "Video", "id": "671536495"}, {"kind": "Video", "id": "671702331"}, {"kind": "Video", "id": "1175994508"}, {"kind": "Video", "id": "671610558"}, {"kind": "Exercise", "id": "xb2523284"}], "children": [{"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/gian-lorenzo-bernini-pluto-and-proserpina-1621-22/", "id": "3motcx0GRck", "title": "Bernini, Pluto and Proserpina", "kind": "Video", "description": "Gian Lorenzo Bernini, Pluto and Proserpina (also know as the Rape of Proserpina), 1621-22, marble (Galleria Borghese, Rome). Proserpina is the Latin varient of the mythic Greek Persephone.", "slug": "gian-lorenzo-bernini-pluto-and-proserpina-1621-22"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-david-1623-24/", "id": "YKzHdQKX9RA", "title": "Bernini, David", "kind": "Video", "description": "Gian Lorenzo Bernini, David, 1623-24, marble (Galleria Borghese, Rome)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "bernini-david-1623-24"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-s-david-quiz/", "id": "bernini-s-david-quiz", "title": "Bernini, David (quiz)", "description": "Test your knowledge.", "slug": "bernini-s-david-quiz", "kind": "Exercise"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-apollo-and-daphne-1622-25/", "id": "e3RSRrUL1Os", "title": "Bernini, Apollo and Daphne", "kind": "Video", "description": "Bernini, Apollo and Daphne, 1622-25 (Galleria Borghese, Rome)\n\nVoices: Dr. Beth Harris and Dr. Steven Zucker", "slug": "bernini-apollo-and-daphne-1622-25"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-baldacchino/", "id": "EFsaaK1w2Ao", "title": "Gian Lorenzo Bernini, Baldacchino", "kind": "Video", "description": "Bernini, Baldacchino, 1624-33, 100 feet high, gilded bronze (Saint Peter's Basilica, Vatican City, Rome)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "bernini-baldacchino"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-bust-of-medusa-c-1644-48/", "id": "W3a2QIm3cXM", "title": "Bernini, Bust of Medusa", "kind": "Video", "description": "Gian Lorenzo Bernini, Bust of Medusa, marble, c. 1644-48 (Capitoline Museum)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\n\u00a0\n\nMedusa, one of the three Gorgons, daughter of Phorcys and Ceto. She was the only one of the Gorgons who was subject to mortality. She is celebrated for her personal charms and the beauty of her locks. Neptune became enamoured of her, and obtained her favours in the temple of Minerva. This violation of the sanctity of the temple provoked Minerva, and she changed the beautiful locks of Medusa, which had inspired Neptune\u2019s love to serpents.\n\nAccording to Apollodorus, Medusa and her sisters came into the world with snakes on their heads, instead of hair, with yellow wings and brazen hands. Their bodies were also covered with impenetrable scales, and their very looks had the power of killing or turning to stones. Perseus rendered his name immortal by his conquest of Medusa. He cut off her head, and the blood that dropped from the wound produced the innumerable serpents that infest Africa. The conqueror placed Medusa's head on the shield of Minerva, which he had used in his expedition. The head still retained the same petrifying power as before, as it was fatally known in the court of Cepheus. . . . Some suppose that the Gorgons were a nation of women, whom Perseus conquered.(From\u00a0Lempri\u00e9re\u2019s Classical Dictionary of Proper names mentioned in Ancient Authors Writ Large. Ed. J. Lempri\u00e9re and F.A. Wright. London: Routledge & Kegan Paul. As quoted by\u00a0Modern American Poetry site, Department of English, University of Illinois)", "slug": "bernini-bust-of-medusa-c-1644-48"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-ecstasy-of-st-theresa/", "id": "RKcJvjP9zgY", "title": "Bernini, Ecstasy of Saint Teresa", "kind": "Video", "description": "Gian Lorenzo Bernini, Ecstasy of Saint Teresa, 1647-52 (Cornaro Chapel, Santa Maria della Vittoria, Rome). Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nThis is Saint Teresa's\u00a0description of the event that Bernini depicts:\u00a0\"Beside me, on the left, appeared an angel in bodily form.... He was not tall but short, and very beautiful; and his face was so aflame that he appeared to be one of the highest rank of angels, who seem to be all on fire.... In his hands I saw a great golden spear, and at the iron tip there appeared to be a point of fire. This he plunged into my heart several times so that it penetrated to my entrails. When he pulled it out I felt that he took them with it, and left me utterly consumed by the great love of God. The pain was so severe that it made me utter several moans. The sweetness caused by this intense pain is so extreme that one cannot possibly wish it to cease, nor is one's soul content with anything but God. This is not a physical but a spiritual pain, though the body has some share in it\u2014even a considerable share.\"", "slug": "bernini-ecstasy-of-st-theresa"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-s-ecstasy-of-saint-teresa-quiz/", "id": "bernini-s-ecstasy-of-saint-teresa-quiz", "title": "Bernini, Ecstasy of Saint Teresa (quiz)", "description": "Test your knowledge.", "slug": "bernini-s-ecstasy-of-saint-teresa-quiz", "kind": "Exercise"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/gian-lorenzo-bernini-cathedra-petri-chair-of-st-peter-c-120-80-b-c-e/", "id": "z-yC6Owcg7g", "title": "Bernini, Cathedra Petri (Chair of St. Peter)", "kind": "Video", "description": "Gian Lorenzo Bernini, Cathedra Petri (or Chair of St. Peter), gilded bronze, gold, wood, stained glass, 1647-53 (apse of Saint Peter's Basilica, Vatican City, Rome).\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker \n\nAccording to tradition, St. Peter himself, the founder of the institution of the Church and considered the first pope, sat on the ancient wooden chair that is encased within this larger bronze and gold chair.", "slug": "gian-lorenzo-bernini-cathedra-petri-chair-of-st-peter-c-120-80-b-c-e"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-st-peter-s-piazza-1656-67/", "id": "ljmwlMTH5Tk", "title": "Bernini, Saint Peter's Square", "kind": "Video", "description": "Gianlorenzo Bernini, Saint Peter's Square (Piazza San Pietro), Vatican City, Rome, 1656-67\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "bernini-st-peter-s-piazza-1656-67"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/bernini-sant-andrea-al-quirinale/", "id": "EhEg8Wx_NA8", "title": "Bernini, Sant'Andrea al Quirinale", "kind": "Video", "description": "Gian Lorenzo Bernini, Sant'Andrea al Quirinale, 1658-70, Rome; commissioned by Cardinal Camillo Francesco Maria Pamphili for the nearby Jesuit seminary", "slug": "bernini-sant-andrea-al-quirinale"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/francesco-borromini-san-carlo-1638-1646/", "id": "Wm-akMcsHEc", "title": "Borromini, San Carlo alle Quattro Fontane", "kind": "Video", "description": "Francesco Borromini, San Carlo alle Quattro Fontane (\"Carlino\"), Rome. Commissioned by Cardinal Francesco Barberini in 1634 for the Holy Order of the Trinity; construction began in 1638 and the church was consecrated in 1646.\n\nSpeakers: Frank Dabell, Dr. Beth Harris, and Dr. Steven Zucker", "slug": "francesco-borromini-san-carlo-1638-1646"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-narcissus-at-the-source-1597-99/", "id": "JrTsNuUQXzU", "title": "Caravaggio, Narcissus at the Source", "kind": "Video", "description": "Michelangelo Merisi da Caravaggio, Narcissus at the Source, oil on canvas, 1597-99 (Palazzo Barbarini) \n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "caravaggio-narcissus-at-the-source-1597-99"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-contarelli-chapel-san-luigi-dei-francesi-rome/", "id": "OcUMAHfo9MA", "title": "Caravaggio, Contarelli Chapel, San Luigi dei Francesi", "kind": "Video", "description": "Caravaggio, Calling of St. Matthew, c. 1599-1600, oil on canvas (Contarelli Chapel, San Luigi dei Francesi, Rome). A Smarthistory video by Beth Harris and Steven Zucker", "slug": "caravaggio-contarelli-chapel-san-luigi-dei-francesi-rome"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-s-calling-of-st-matthew-c-1599-1600/", "id": "SZF5K8epWko", "title": "Caravaggio, Calling of Saint Matthew", "kind": "Video", "description": "Caravaggio's Calling of St. Matthew, oil on canvas, c. 1599-1600 (Contarelli Chapel, San Luigi dei Francesi, Rome)", "slug": "caravaggio-s-calling-of-st-matthew-c-1599-1600"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-calling-of-st-matthew-quiz/", "id": "caravaggio--calling-of-st--matthew-quiz", "title": "Caravaggio, Calling of St. Matthew (quiz)", "description": "Test your knowledge.", "slug": "caravaggio-calling-of-st-matthew-quiz", "kind": "Exercise"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-crucifixion-of-st-peter-1601/", "id": "cLICU2cDHrs", "title": "Caravaggio, Crucifixion of Saint Peter", "kind": "Video", "description": "Caravaggio, Crucifixion of St. Peter, oil on canvas, 1601 (Santa Maria del Popolo, Rome) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "caravaggio-crucifixion-of-st-peter-1601"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-the-supper-at-emmaus-1601/", "id": "asLQmxK7ExY", "title": "Caravaggio, Supper at Emmaus", "kind": "Video", "description": "Michelangelo Merisi da Caravaggio, The Supper at Emmaus, 1601, oil on canvas, 55 x 77 inches, 141 x 196.2 cm (National Gallery, London) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "caravaggio-the-supper-at-emmaus-1601"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/caravaggio-death-of-the-virgin-1605-06/", "id": "TkH-yjJ35vU", "title": "Caravaggio, Death of the Virgin", "kind": "Video", "description": "Caravaggio, Death of the Virgin, 1605-06, Oil on canvas, 12 feet, 10 inches x 8 feet (369 x 245 cm) (Mus\u00e9e du Louvre, Paris) Painted for the altar of a family chapel in the church of Santa Maria della Scala del Trastevere, Rome. Speakers: Drs. Beth Harris and Steven Zucker http://www.smarthistory.org/caravaggios-death-of-the-virgin.html", "slug": "caravaggio-death-of-the-virgin-1605-06"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/gentileschi-judith/", "id": "BHFuLS9NW6s", "title": "Gentileschi, Judith and Holofernes", "kind": "Video", "description": "Artemisia Gentileschi, Judith and Holofernes, 1620-21, oil on canvas, 162.5 x 199 cm (Uffizi Gallery, Florence)\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "gentileschi-judith"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/guercino-st-luke-displaying-a-painting-of-the-virgin-1652-53/", "id": "EczhLjFtyio", "title": "Guercino, Saint Luke Displaying a Painting of the Virgin", "kind": "Video", "description": "Guercino, St. Luke Displaying a Painting of the Virgin, oil on canvas, 1652-53\n(Nelson-Atkins Museum of Art, Kansas City)", "slug": "guercino-st-luke-displaying-a-painting-of-the-virgin-1652-53"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/il-gesu-rome-consecrated-1584/", "id": "aj2el_owSg4", "title": "Il Ges\u00f9, including Triumph of the Name of Jesus ceiling fresco", "kind": "Video", "description": "Giacomo Barozzi da Vignola and Giacomo Barozzi da Vignola, Church of Il Gesu, Rome (consecrated 1584, ceiling fresco, The Triumph of the Name of Jesus, by il Baciccio, also known as Giovanni Battista Gaulli, 1672-1685). Speakers: Frank Dabell, Beth Harris, and Steven Zucker Made with our partners, contexttravel.org", "slug": "il-gesu-rome-consecrated-1584"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/pozzo-st-ignatius-chapel-il-gesu-rome-commissioned-in-1695/", "id": "A3vkqYgJ93c", "title": "Pozzo, Saint Ignatius Chapel, Il Ges\u00f9", "kind": "Video", "description": "Andrea Pozzo, Saint Ignatius Chapel in the left transept of the church, Il Ges\u00f9, Rome (commissioned in 1695). \n\nMany artists contributed including Alessandro Algardi, Pierre Legros, Bernardino Ludovisi, Il Lorenzone and Jean-Baptiste Th\u00e9odon. \nMaterials include bronze, gold, silver, and many semiprecious stones most notably lapis lazuli. \n\nhttp://smarthistory.org/andrea-pozzos-saint-ignatius-chapel-in-church-il-gesu.html\nSpeakers: Frank Dabell, Dr. Beth Harris and Dr. Steven Zucker", "slug": "pozzo-st-ignatius-chapel-il-gesu-rome-commissioned-in-1695"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/pozzo-glorification-of-saint-ignatius-ceiling-fresco-in-the-nave-of-sant-ignazio-rome-1691-94/", "id": "7ym7FWyCzKI", "title": "Pozzo, Glorification of Saint Ignatius, Sant'Ignazio", "kind": "Video", "description": "Fra Andrea Pozzo, Glorification of Saint Ignatius, ceiling fresco in the nave of Sant'Ignazio, Rome, 1691-94\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "pozzo-glorification-of-saint-ignatius-ceiling-fresco-in-the-nave-of-sant-ignazio-rome-1691-94"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/pierre-le-gros-the-younger-stanislas-kostka-on-his-deathbed-1703/", "id": "FgVkgR1bXvY", "title": "Pierre Le Gros the Younger, Stanislas Kostka on his Deathbed", "kind": "Video", "description": "Pierre Le Gros the Younger, Stanislas Kostka on His Deathbed, 1703, upstairs at Bernini's Sant'Andrea al Quirinale\n\nSpeakers: Frank Dabbell, Beth Harris and Steven Zucker \n\nA Smarthistory.org video", "slug": "pierre-le-gros-the-younger-stanislas-kostka-on-his-deathbed-1703"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/baroque-italy/baroque-art-in-italy/", "id": "baroque-art-in-italy", "title": "Baroque art in Italy (quiz)", "description": "Test your knowledge.", "slug": "baroque-art-in-italy", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial is about magic. Bernini turns stone into flesh and Caravaggio makes the distant stories of the Bible into immediate experiences that take place before our eyes. Here are glorious frescos that dissolve the ceilings of cathedrals and reach up to the infinity of heaven.", "node_slug": "baroque-italy", "render_type": "Tutorial", "topic_page_url": "/humanities/monarchy-enlightenment/baroque-art1/baroque-italy", "extended_slug": "humanities/monarchy-enlightenment/baroque-art1/baroque-italy", "kind": "Topic", "slug": "baroque-italy"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/", "id": "flanders-1", "hide": false, "title": "Flanders", "child_data": [{"kind": "Video", "id": "xeb53c8df"}, {"kind": "Article", "id": "xf46f8099"}, {"kind": "Video", "id": "1159741563"}, {"kind": "Video", "id": "x2bd17f66"}, {"kind": "Article", "id": "x2a3da48e"}, {"kind": "Video", "id": "671691300"}, {"kind": "Video", "id": "671622665"}, {"kind": "Video", "id": "x5126b6bf"}, {"kind": "Exercise", "id": "x26420a2a"}], "children": [{"path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/rubens-elevation/", "id": "qyQGBJIYC5s", "title": "Peter Paul Rubens, Elevation of the Cross", "kind": "Video", "description": "Peter Paul Rubens, Elevation of the Cross, 1610, oil on wood, 15 feet 1-7/8 inches x 11 feet 1-1/2 inches (originally for Saint Walpurgis (destroyed),\u00a0now in Antwerp Cathedral)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "rubens-elevation"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/peter-paul-rubens-the-rape-of-the-daughters-of-leucippus/", "id": "t9_lemSlr1o", "title": "Rubens, The Rape of the Daughters of Leucippus", "kind": "Video", "description": "Sir Peter Paul Rubens, The Rape of the Daughters of Leucippus, 1617-18, oil on canvas, 224 x 210.5 cm, Alte Pinakothek, Munich Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "peter-paul-rubens-the-rape-of-the-daughters-of-leucippus"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/rubens-marie/", "id": "jWQ4V43TJ6o", "title": "Rubens, The Presentation of the Portrait of Marie de' Medici", "kind": "Video", "description": "Peter Paul Rubens, The Presentation of the Portrait of Marie de' Medici, c. 1622-1625, oil on canvas, 394 x 295 cm (Mus\u00e9e du Louvre)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "rubens-marie"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/rubens-arrival-or-disembarkation-of-marie-de-medici-at-marseilles-1621-25/", "id": "fbwW9mHFcgk", "title": "Rubens, Arrival (or Disembarkation) of Marie de Medici at Marseilles, Medici Cycle", "kind": "Video", "description": "Peter Paul Rubens, Arrival (or Disembarkation) of Marie de Medici at Marseilles,1621-25, oil on canvas, 394 x 295 cm (Mus\u00e9e du Louvre, Paris) Speakers: Drs. Beth Harris and Steven Zucker", "slug": "rubens-arrival-or-disembarkation-of-marie-de-medici-at-marseilles-1621-25"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/peter-paul-rubens-the-consequences-of-war-1638-39/", "id": "K9iMsmhBOjk", "title": "Rubens, the Consequences of War", "kind": "Video", "description": "Peter Paul Rubens, The Consequences of War, 1638-39, oil on canvas (Palatine Gallery, Palazzo Pitti, Florence), speakers: Dr. Steven Zucker and Dr. Beth Harris\n\nRubens, explaining his painting, The Consequences of War:\n\nThe principal figure is Mars, who has left open the temple of Janus (which in time of peace, according to Roman custom, remained closed) and rushes forth with shield and blood-stained sword, threatening the people with great disaster. He pays little heed to Venus, his mistress, who, accompanied by Amors and Cupids, strives with caresses and emraces to hold him. From the other side, Mars is dragged forward by the Fury Alekto, with a torch in her hand. Near by are monsters personifying Pestilence and Famine, those inseparable partners of War. On the ground, turning her back, lies a woman with a broken lute, representing Harmony, which is incompatible with the discord of War. There is also a mother with her child in her arms, indicating that fecundity, procreation and charity are thwarted by War, which corrupts and destroys everything. In addition, one sees an architect thrown on his back, with his instruments in his hand, to show that which in time of peace is constructed for the use and ornamentation of the City, is hurled to the ground by the force of arms and falls to ruin. I believe, if I remember rightly, that you will find on the ground, under the feet of Mars, a book and a drawing on paper, to imply that he treads underfoot all the arts and letters. There ought also to be a bundle of darts or arrows, with the band which held them together undone; these when bound form the symbol of Concord. Beside them is the caduceus and an olive branch, attribute of Peace; these are also cast aside. That grief-stricken woman clothed in black, with torn veil, robbed of all her jewles and other ornaments, is the unfortunate Europe who, for so many years now, has suffered plunder, outrage, and misery, which are so injurious to everyone, that it is unnecessary to go into detail. Europe's attribute is the globe, borne by a small angel or genius, and surmounted by the cross, to symbolize the Christian world. (from a letter to Justus Sustermans, translated by Kristin Lohse Belin, in Rubens, Phaidon, 1998).", "slug": "peter-paul-rubens-the-consequences-of-war-1638-39"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/van-dyck-charles-i/", "id": "SHZojeuDLjM", "title": "Anthony van Dyck, Charles I at the Hunt", "kind": "Video", "description": "Anthony van Dyck, Charles I at the Hunt, c. 1635, oil on canvas, 2.66 x 2.07 m (Mus\u00e9e du Louvre), inscribed: \"Carolus.I.REX Magnae Britanniae\" - Charles I rules Great Britain\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "van-dyck-charles-i"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/flanders-1/baroque-art-in-flanders/", "id": "baroque-art-in-flanders", "title": "Baroque art in Flanders (quiz)", "description": "Test your knowledge.", "slug": "baroque-art-in-flanders", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial focuses on the art of Peter Paul Rubens, whose work was in high demand by nearly every King, Queen and aristocrat in Catholic Europe (good thing he had a huge workshop!). Rubens was a master of color, dramatic compositions, and movement. Although he was from Northern Europe, he traveled to Italy and absorbed the art of the Renaissance, of classical antiquity, and of Caravaggio. He painted nearly every type of subject\u2014landscapes, portraits, mythology, and history paintings.", "node_slug": "flanders-1", "render_type": "Tutorial", "topic_page_url": "/humanities/monarchy-enlightenment/baroque-art1/flanders-1", "extended_slug": "humanities/monarchy-enlightenment/baroque-art1/flanders-1", "kind": "Topic", "slug": "flanders-1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/", "id": "holland", "hide": false, "title": "Dutch Republic", "child_data": [{"kind": "Video", "id": "708138867"}, {"kind": "Video", "id": "719786822"}, {"kind": "Video", "id": "xe82c5b32"}, {"kind": "Article", "id": "xdc69f7fe"}, {"kind": "Video", "id": "xcebf0456"}, {"kind": "Article", "id": "x7664e21a"}, {"kind": "Article", "id": "xb7c3dad4"}, {"kind": "Video", "id": "671622663"}, {"kind": "Video", "id": "xcfe1b3de"}, {"kind": "Video", "id": "x6737a4c4"}, {"kind": "Video", "id": "671622662"}, {"kind": "Video", "id": "xca57f334"}, {"kind": "Article", "id": "xb323cbe4"}, {"kind": "Video", "id": "xb3c48a24"}, {"kind": "Video", "id": "708138866"}, {"kind": "Video", "id": "671686569"}, {"kind": "Video", "id": "x7f6822bf"}, {"kind": "Exercise", "id": "x6ecb93b4"}, {"kind": "Video", "id": "xd8dc58b1"}, {"kind": "Video", "id": "x67786c28"}, {"kind": "Article", "id": "xc21701f4"}, {"kind": "Video", "id": "xb604e352"}, {"kind": "Video", "id": "xaa8592e4"}, {"kind": "Article", "id": "x4bd30db4"}, {"kind": "Video", "id": "671686574"}, {"kind": "Exercise", "id": "xd95f6f47"}], "children": [{"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/frans-hals-singing-boy-with-flute-c-1623/", "id": "iQ5uG6ryCa4", "title": "Hals, Singing Boy with Flute", "kind": "Video", "description": "Frans Hals, Singing Boy with Flute, c. 1623, oil on canvas, 68.8 x 55.2 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)", "slug": "frans-hals-singing-boy-with-flute-c-1623"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/frans-hals-malle-babbe-c-1633/", "id": "9fEublFSTOg", "title": "Hals, Malle Babbe", "kind": "Video", "description": "Frans Hals, Malle Babbe, c. 1633, oil on canvas, 78.50 x 66.20 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)", "slug": "frans-hals-malle-babbe-c-1633"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/rembrandt-tulp/", "id": "DhefUahS55o", "title": "Rembrandt, The Anatomy Lesson of Dr. Tulp", "kind": "Video", "description": "Rembrandt van Rijn, The Anatomy Lesson of Dr. Nicolaes Tulp, 1632, oil on canvas, 169.5 x 216.5 cm, (Mauritshuis, Den Haag). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "rembrandt-tulp"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/rembrandt-nightwatch/", "id": "0D_rc92g27w", "title": "Rembrandt, The Night Watch", "kind": "Video", "description": "Rembrandt van Rijn, The Night Watch (Militia Company of District II under the Command of Captain Frans Banninck Cocq), 1642, oil on canvas, 379.5 x 453.5 cm (Rijksmuseum, Amsterdam)\n\nSpeakers: Dr Beth Harris and Dr. Steven Zucker", "slug": "rembrandt-nightwatch"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/rembrandt-a-girl-at-a-window-1645/", "id": "xSixUm1cXSw", "title": "Rembrandt, Girl at a Window", "kind": "Video", "description": "Rembrandt Harmensz van Rijn, Girl at a Window, 1645, oil on canvas, 32 x 24 in. (81.6 x 61 cm), (Dulwich Picture Gallery, London) Speakers: Pippa Couch, Rachel Ropeik", "slug": "rembrandt-a-girl-at-a-window-1645"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/the-choice/", "id": "B2dCeTPDEKY", "title": "Rembrandt, Aristotle with a Bust of Homer", "kind": "Video", "description": "Met curator Walter Liedtke on reflection in Rembrandt van Rijn\u2019s Aristotle with a Bust of Homer, 1653\n\nAristotle (384\u2013322 B.C.E.) rests his hand reflectively on a bust of Homer, the blind epic poet of the Iliad and the Odyssey. A medallion representing Alexander the Great, whom Aristotle tutored, hangs from the heavy gold chain. The philosopher contemplates material rewards as opposed to spiritual values, with the play of light and shadow on his features suggesting the motions of his mind. Painted for the great Sicilian collector Antonio Ruffo, the picture also refers to Aristotle's comparison of touch and sight as a means of acquiring knowledge.\u00a0\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "the-choice"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/altered-states/", "id": "lF-7leHMUbw", "title": "Rembrandt, Christ Crucified between the Two Thieves: The Three Crosses.", "kind": "Video", "description": "Met curator Nadine Orenstein on universal emotion in Rembrandt van Rijn\u2019s Christ Crucified between the Two Thieves: The Three Crosses, 1653.\n\nThe Three Crosses, Rembrandt's finest works in any medium, represents the culmination of his virtuosity as a printmaker. He drew on the copperplate entirely in drypoint which allowed him to fully exploit the velvety areas of burr raised by the drypoint tool as it cut into the copper. When Rembrandt created this impression, he deliberately left ink on the printing plate; it lightly veils the figures standing at the foot of the cross on the right; a thicker layer almost completely covers the bushes along the right edge. By creatively inking the copperplate, Rembrandt in a certain sense painted each impression. Each time he printed the copperplate he created a unique work. He further varied impressions by printing them on different supports; this impression is printed on vellum, which infuses the composition with a warm light. Vellum, less absorbent than paper, holds ink on the surface, softening lines and enhancing the richness of entire effect.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a\u00a0related lesson plan. For additional educator resources from The Metropolitan Museum of Art, try this and also visit Find an Educator Resource.", "slug": "altered-states"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/rembrandt-van-rijn-bathsheba-at-her-bath-1654/", "id": "wsL4Uh0BrQw", "title": "Rembrandt, Bathsheba at her Bath", "kind": "Video", "description": "Rembrandt van Rijn, Bathsheba at Her Bath, 1654, oil on canvas, 56 x 56 in (142 x 142 cm) , Mus\u00e9e du Louvre, Paris Speakers: Drs. Beth Harris and Steven Zucker", "slug": "rembrandt-van-rijn-bathsheba-at-her-bath-1654"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/rembrandt-nga-self-portrait/", "id": "rFMFH8Nf0Zw", "title": "Rembrandt, Self-Portrait", "kind": "Video", "description": "Rembrandt van Rijn, Self-Portrait, 1659, oil on canvas, 84.5 x 66 cm (National Gallery of Art)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "rembrandt-nga-self-portrait"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/leyster-self/", "id": "xt2M4HTw29A", "title": "Judith Leyster, Self-Portrait", "kind": "Video", "description": "Judith Leyster, Self-Portrait, c. 1633, oil on canvas, 74.6 x 65.1 cm / 29-3/8 x 25-5/8 inches (National Gallery of Art)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "leyster-self"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/jan-vermeer-the-glass-of-wine-c-1661/", "id": "uvA6YY4yHtM", "title": "Vermeer, The Glass of Wine", "kind": "Video", "description": "Jan Vermeer, The Glass of Wine, c. 1661, oil on canvas, 67.7 x 79.6 cm (Gem\u00e4ldegalerie, Staatliche Museen zu Berlin)", "slug": "jan-vermeer-the-glass-of-wine-c-1661"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/vermeer-young-woman-with-a-water-pitcher-c-1662/", "id": "_38xl7p4VaM", "title": "Vermeer, Young Woman with a Water Pitcher", "kind": "Video", "description": "Johannes Vermeer, Young Woman with a Water Pitcher, oil on canvas, c. 1662 (Metropolitan Museum of Art) Speakers: Dr. Steven Zucker, Dr. Beth Harris http://smarthistory.org/baroque-holland.html http://smarthistory.org/baroque-holland.html", "slug": "vermeer-young-woman-with-a-water-pitcher-c-1662"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/vermeer-woman-with-balance/", "id": "WO1I1dN0DaA", "title": "Johannes Vermeer, Woman Holding a Balance", "kind": "Video", "description": "Johannes Vermeer, Woman Holding a Balance, 1664, oil on canvas, 42.5 cm \u00d7 38 cm / 16.7 in \u00d7 15 in (National Gallery of Art)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "vermeer-woman-with-balance"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/vermeer-s-woman-holding-a-balance-quiz/", "id": "vermeer-s-woman-holding-a-balance-quiz", "title": "Vermeer, Woman Holding a Balance (quiz)", "description": "Test your knowledge.", "slug": "vermeer-s-woman-holding-a-balance-quiz", "kind": "Exercise"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/vermeer-pearl-earring/", "id": "M-jLsoA1i_o", "title": "Johannes Vermeer, Girl with a Pearl Earring", "kind": "Video", "description": "Johannes Vermeer, Girl with a Pearl Earring, c. 1665, oil on canvas, 44.5 x 39 inches (Mauritshuis, The Hague). \u00a0A conversation with Dr. Steven Zucker and Dr. Beth Harris.", "slug": "vermeer-pearl-earring"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/vermeer-the-art-of-painting/", "id": "mVkAvYhgW8c", "title": "Johannes Vermeer, The Art of Painting", "kind": "Video", "description": "Johannes Vermeer, The Art of Painting, 1666-69, oil on canvas, 130\u00a0x 110\u00a0cm (Kunsthistorisches Museum, Vienna).\u00a0Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "vermeer-the-art-of-painting"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/ruisdael-haarlem/", "id": "L7P3kBJ3scg", "title": "Ruisdael, View of Haarlem with Bleaching Grounds", "kind": "Video", "description": "Jacob van Ruisdael, View of Haarlem with Bleaching Grounds, c. 1670\u201375, oil on canvas, 55.5 x 62 cm (Mauritshuis, The Hague)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "ruisdael-haarlem"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/ruysch-flowers-insects/", "id": "EK-h6cZCXrs", "title": "Rachel Ruysch, Fruit and Insects", "kind": "Video", "description": "Rachel Ruysch, Fruit and Insects, 1711, oil on wood, 44 x 60 cm (Galleria degli Uffizi, Florence); speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "ruysch-flowers-insects"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/jan-van-huysum-vase-with-flowers-c-1718-20/", "id": "WOnOq9YIrWI", "title": "Van Huysum, Vase with Flowers", "kind": "Video", "description": "Jan van Huysum, Vase with Flowers, c. 1718-20, oil on canvas, 24 x 31 in. (61 x 79 cm), (Dulwich Picture Gallery, London)\n\nSpeakers: Pippa Couch, Rachel S. Ropeik", "slug": "jan-van-huysum-vase-with-flowers-c-1718-20"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/holland/baroque-art-in-holland/", "id": "baroque-art-in-holland", "title": "Baroque art in Holland (quiz)", "description": "Test your knowledge!", "slug": "baroque-art-in-holland", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In the Protestant Dutch Republic of the 17th century there was an enormous demand for art from a wide cross-section of the public. This was a very good thing, since the institution that had been the main patron for art\u2014the Church\u2014was no longer in the business of commissioning art due to the Protestant Reformation. Dutch artists sought out new subjects of interest to their new clientele, scenes of everyday life (genre paintings), landscapes and still-lifes. There was also an enormous market for portraits. One of the greatest artist of this period, Rembrandt, made his name as a portrait painter, but was also a printmaker, and his work also includes moving interpretations of biblical subjects (though from a Protestant perspective).", "node_slug": "holland", "render_type": "Tutorial", "topic_page_url": "/humanities/monarchy-enlightenment/baroque-art1/holland", "extended_slug": "humanities/monarchy-enlightenment/baroque-art1/holland", "kind": "Topic", "slug": "holland"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/", "id": "spain", "hide": false, "title": "Spain", "child_data": [{"kind": "Article", "id": "x8ec68f55"}, {"kind": "Article", "id": "x48832a1e"}, {"kind": "Video", "id": "671622664"}, {"kind": "Video", "id": "671632343"}, {"kind": "Article", "id": "x37fa3b15"}, {"kind": "Video", "id": "671702330"}, {"kind": "Exercise", "id": "x04ab86b2"}, {"kind": "Article", "id": "x71b53e7d"}, {"kind": "Video", "id": "671563218"}, {"kind": "Video", "id": "x05723c67"}, {"kind": "Exercise", "id": "x6e0a511f"}], "children": [{"path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/vel-zquez-los-borrachos-the-drunks-1628-1629/", "id": "dNoeLF6I52s", "title": "Vel\u00e1zquez Los Borrachos or the Triumph of Bacchus", "kind": "Video", "description": "Diego Rodr\u00edguez de Silva y Vel\u00e1zquez, Los Borrachos (The Drunks) or The Triumph of Bacchus, 1628-1629, 165 x 225 cm (Museo Nacional del Prado, Madrid). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "vel-zquez-los-borrachos-the-drunks-1628-1629"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/vel-zquez-vulcan-s-forge-c-1630/", "id": "qoHva5i85Qo", "title": "Vel\u00e1zquez, Vulcan's Forge", "kind": "Video", "description": "Diego Vel\u00e1zquez, Vulcan's Forge, c. 1630, oil on canvas, 223 cm x 290 cm (Museo del Prado, Madrid) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "vel-zquez-vulcan-s-forge-c-1630"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/vel-zquez-las-meninas-c-1656/", "id": "IiTtGENiVOA", "title": "Vel\u00e1zquez, Las Meninas", "kind": "Video", "description": "Diego Rodr\u00edguez de Silva y Vel\u00e1zquez, Las Meninas, c. 1656, oil on canvas, 125 1/4 x 108 5/8 in. (318 x 276 cm), (Museo Nacional del Prado, Madrid)", "slug": "vel-zquez-las-meninas-c-1656"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/vel-zquez-s-las-meninas-quiz/", "id": "vel-zquez-s-las-meninas-quiz", "title": "Vel\u00e1zquez, Las Meninas (quiz)", "description": "Test your knowledge.", "slug": "vel-zquez-s-las-meninas-quiz", "kind": "Exercise"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/ribera-the-martyrdom-of-saint-philip-1639/", "id": "xz5DhwMsS1A", "title": "Ribera, Martyrdom of Saint Philip", "kind": "Video", "description": "Jusepe (Jos\u00e9) de Ribera, The Martyrdom of Saint Philip, 1639, oil on canvas, 92 x 92 in. (234 x 234 cm), (Museo Nacional del Prado, Madrid) Speakers: Dr. Beth Harris, Dr. Steven Zucker The English Romantic poet, Lord Byron, wrote that the artist, \"Spagnoletto [the little Spaniard] tainted/His brush with all the blood of all the sainted\" (Don Juan , xiii. 71).", "slug": "ribera-the-martyrdom-of-saint-philip-1639"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/making-spanish-polychrome-sculpture/", "id": "9Wb-T1F033Q", "title": "Making a Spanish polychrome sculpture", "kind": "Video", "description": "17th Century Spanish polychrome sculpture can achieve remarkable realism. Learn about the techniques estofado\u2014painting and incising to portray silk fabrics, and encarnaciones\u2014for the hair and skin. Love art? Follow us on Google+", "slug": "making-spanish-polychrome-sculpture"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/spain/baroque-art-in-spain/", "id": "baroque-art-in-spain", "title": "Baroque art in Spain (quiz)", "description": "Test your knowledge!", "slug": "baroque-art-in-spain", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The main focus of this tutorial, and a leading artist at this time is the great Diego Velazquez, who spent most of his career as the court painter to the King of Spain painting official portraits. But in the hands of Velazquez, even mundane portraits became masterpieces of brushwork and color. His early work was influenced by the realism of Caravaggio. Get up close to the princess in his later masterpiece, Las Meninas (The Maids of Honor), and you\u2019ll see broad brushstrokes of red, pink, black and white, but step back and they magically resolve to create a perfect illusion of the silk of her dress and the light moving across her face and hair. No other artist, except perhaps Titian and Rubens, revealed so honestly the alchemy of painting\u2014how paint can be turned into reality.", "node_slug": "spain", "render_type": "Tutorial", "topic_page_url": "/humanities/monarchy-enlightenment/baroque-art1/spain", "extended_slug": "humanities/monarchy-enlightenment/baroque-art1/spain", "kind": "Topic", "slug": "spain"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/baroque-art1/france/", "id": "france", "hide": false, "title": "France", "child_data": [{"kind": "Video", "id": "xe0b728b7"}, {"kind": "Video", "id": "719786821"}, {"kind": "Video", "id": "671711122"}, {"kind": "Article", "id": "xdcc863cc"}, {"kind": "Article", "id": "xd50ea57d"}, {"kind": "Exercise", "id": "xe7a39e2b"}, {"kind": "Exercise", "id": "xf3585b7d"}], "children": [{"path": "khan/humanities/monarchy-enlightenment/baroque-art1/france/poussin-et-in-arcadia/", "id": "dgsogHXtwyA", "title": "Nicolas Poussin, Et in Arcadia Ego", "kind": "Video", "description": "Nicolas Poussin,\u00a0Et in Arcadia Ego, 1637-38, oil on canvas, 87 x 120 cm (Mus\u00e9e du Louvre). Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "poussin-et-in-arcadia"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/france/nicolas-poussin-landscape-with-saint-john-on-patmos-1640/", "id": "H3uBAVI4xC4", "title": "Poussin, Landscape with St. John", "kind": "Video", "description": "Nicolas Poussin,\u00a0Landscape with Saint John on PatmosSpeakp, 1640, oil on canvas, 100.3 x 136.4 cm / 39-1/2 x 53-5/8 inches (Art Institute of Chicago).", "slug": "nicolas-poussin-landscape-with-saint-john-on-patmos-1640"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/france/antoine-or-louis-le-nain-peasant-family-in-an-interior-2nd-quarter-of-the-17th-century/", "id": "ZSh1ksh1iO4", "title": "Antoine or Louis Le Nain, Peasant Family in an Interior", "kind": "Video", "description": "Antoine or Louis Le Nain, Peasant Family in an Interior, 2nd quarter of the 17th century, oil on canvas, 1.13 x 1.59 m (Mus\u00e9e du Louvre, Paris) http://www.smarthistory.org/peasant-family-in-an-interior.html Speakers: Drs. Beth Harris and Steven Zucker", "slug": "antoine-or-louis-le-nain-peasant-family-in-an-interior-2nd-quarter-of-the-17th-century"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/france/versailles-quiz/", "id": "versailles-quiz", "title": "Versailles (quiz)", "description": "Test your knowledge.", "slug": "versailles-quiz", "kind": "Exercise"}, {"path": "khan/humanities/monarchy-enlightenment/baroque-art1/france/baroque-art-in-france/", "id": "baroque-art-in-france", "title": "Baroque art in France (quiz)", "description": "Test your knowledge.", "slug": "baroque-art-in-france", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In France, the LeNain Brothers painted scenes of every-day life (genre paintings), often depicting peasants. There was a renewal of interest in their art in the mid-Nineteenth Century, when the art critic, Champfluery wrote that the brothers \u201cconsidered men in tatters more interesting than courtiers in embroidered garments.\u201d At the same time, Poussin created a very different style\u2014one that was highly intellectual and looked back to Renaissance, and ancient Greek and Roman art.", "node_slug": "france", "render_type": "Tutorial", "topic_page_url": "/humanities/monarchy-enlightenment/baroque-art1/france", "extended_slug": "humanities/monarchy-enlightenment/baroque-art1/france", "kind": "Topic", "slug": "france"}], "in_knowledge_map": false, "description": "Stone becomes flesh and ceilings dissolve into the infinity of heaven\u2014artists such as Bernini, Caravaggio, Rubens, Velazquez and Rembrandt were masters of drama and illusion.", "node_slug": "baroque-art1", "render_type": "Topic", "topic_page_url": "/humanities/monarchy-enlightenment/baroque-art1", "extended_slug": "humanities/monarchy-enlightenment/baroque-art1", "kind": "Topic", "slug": "baroque-art1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/rococo/", "id": "rococo", "hide": false, "title": "Rococo", "child_data": [{"kind": "Article", "id": "x06c8f930"}, {"kind": "Article", "id": "x87961111"}, {"kind": "Video", "id": "xba6ffdec"}, {"kind": "Exercise", "id": "xbf526e3a"}, {"kind": "Video", "id": "669432588"}, {"kind": "Article", "id": "x252e47d8"}, {"kind": "Article", "id": "xe5d837f9"}, {"kind": "Video", "id": "671260998"}, {"kind": "Article", "id": "xe281b878"}, {"kind": "Video", "id": "xd50f0896"}, {"kind": "Video", "id": "x7383cb71"}, {"kind": "Video", "id": "x8c488fdf"}, {"kind": "Video", "id": "671539972"}, {"kind": "Exercise", "id": "xecd157fd"}, {"kind": "Video", "id": "708141472"}, {"kind": "Article", "id": "x30d0ae33"}, {"kind": "Exercise", "id": "x2f9a2533"}], "children": [{"path": "khan/humanities/monarchy-enlightenment/rococo/watteau-cythera/", "id": "8ZlH2JswO3Q", "title": "Antoine Watteau, Pilgrimage to Cythera", "kind": "Video", "description": "\u200bAntoine Watteau, Pilgrimage to Cythera, 1717, oil on canvas, 4' 3\" x 6' 4 1/2\" (Louvre, Paris).\n\u00a0oil on canvas, 4' 3\" x 6' 4 1/2\" (Louvre, Paris).\u00a0\u200bSpeakers: \u00a0Dr. Steven Zucker & Dr. Beth Harris", "slug": "watteau-cythera"}, {"path": "khan/humanities/monarchy-enlightenment/rococo/watteau-pilgrimage-to-cythera/", "id": "watteau--pilgrimage-to-cythera", "title": "Watteau, Pilgrimage to Cythera", "description": "Test your knowledge on this object.", "slug": "watteau-pilgrimage-to-cythera", "kind": "Exercise"}, {"path": "khan/humanities/monarchy-enlightenment/rococo/boucher-madame-de-pompadour-1750/", "id": "lnJRkY0mZh4", "title": "Boucher, Madame de Pompadour", "kind": "Video", "description": "Fran\u00e7ois Boucher, Madame de Pompadour, oil on canvas, 1750 (extention of canvas and additional painting likely added by Boucher later, Fogg Museum", "slug": "boucher-madame-de-pompadour-1750"}, {"path": "khan/humanities/monarchy-enlightenment/rococo/lisabeth-louise-vigee-le-brun-madame-perregaux-1789/", "id": "6V9x0d5wRpI", "title": "Vig\u00e9e Le Brun, Madame Perregaux", "kind": "Video", "description": "\u00c9lisabeth-Louise Vig\u00e9e Le Brun, Madame Perregaux, 1789, oil on oak panel,\n99.6 x 78.5 cm (Wallace Collection, London)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "lisabeth-louise-vigee-le-brun-madame-perregaux-1789"}, {"path": "khan/humanities/monarchy-enlightenment/rococo/unlocking-18th-c-french-mechanical-table/", "id": "EblnaLMjdNg", "title": "Unlocking an 18th-century French mechanical table", "kind": "Video", "description": "Discover how an affluent lady of 18th-century France may have used this ornate mechanical table for leisure and work. With a turn of a key, this table transforms into a desk with compartments. Learn about how it operates and its many features. Love art? Follow us on Google+", "slug": "unlocking-18th-c-french-mechanical-table"}, {"path": "khan/humanities/monarchy-enlightenment/rococo/18th-c-french-mechanical-table/", "id": "m5OxVgH-T1I", "title": "Construction of an 18th-century French mechanical table", "kind": "Video", "description": "The innovative mechanics and artistry of Jean-Fran\u00e7ois Oeben's table continue to amaze.\u00a0Love art? Follow us on Google+", "slug": "18th-c-french-mechanical-table"}, {"path": "khan/humanities/monarchy-enlightenment/rococo/inlay-technique-marquetry/", "id": "9JcpyE01Yzc", "title": "The inlay technique of marquetry", "kind": "Video", "description": "During the 1700s, French furniture makers perfected the art of \"painting in wood,\" creating complex designs using natural and dyed veneers selected for color and grain. Watch marquetry being made. Love art? Follow us on Google+", "slug": "inlay-technique-marquetry"}, {"path": "khan/humanities/monarchy-enlightenment/rococo/fragonard-the-swing-1767/", "id": "rVI5Sjm0xKI", "title": "Fragonard, The Swing", "kind": "Video", "description": "Jean-Honor\u00e9 Fragonard, The Swing, oil on canvas, 1767 (Wallace Collection, London) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "fragonard-the-swing-1767"}, {"path": "khan/humanities/monarchy-enlightenment/rococo/fragonard-s-the-swing-quiz/", "id": "fragonard-s-the-swing-quiz", "title": "Fragonard's The Swing Quiz", "description": "This quiz is for the video Fragonard, The Swing.", "slug": "fragonard-s-the-swing-quiz", "kind": "Exercise"}, {"path": "khan/humanities/monarchy-enlightenment/rococo/jean-honor-fragonard-the-progress-of-love-the-meeting-1771-1773/", "id": "w1dqzlTTm0E", "title": "Fragonard, The Meeting", "kind": "Video", "description": "Jean-Honor\u00e9 Fragonard, The Progress of Love: The Meeting, 1771-1773, oil on canvas, 317.5 x 243.8 cm (The Frick Collection, New York)", "slug": "jean-honor-fragonard-the-progress-of-love-the-meeting-1771-1773"}, {"path": "khan/humanities/monarchy-enlightenment/rococo/rococo-art/", "id": "rococo-art", "title": "Rococo Art", "description": "Test your knowledge!", "slug": "rococo-art", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Overgrown gardens heavy with the scent of roses, palaces and luxury; the artists Watteau, Boucher, and Fragonard typify the aristocratic style known as Rococo.", "node_slug": "rococo", "render_type": "Tutorial", "topic_page_url": "/humanities/monarchy-enlightenment/rococo", "extended_slug": "humanities/monarchy-enlightenment/rococo", "kind": "Topic", "slug": "rococo"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/neo-classicism/", "id": "neo-classicism", "hide": false, "title": "Neo-Classicism", "child_data": [{"kind": "Article", "id": "xb1087284"}, {"kind": "Video", "id": "671539970"}, {"kind": "Article", "id": "x936ec236"}, {"kind": "Exercise", "id": "x30c89309"}, {"kind": "Video", "id": "671711125"}, {"kind": "Video", "id": "x76bd6c20"}, {"kind": "Video", "id": "x92d1fa7a"}, {"kind": "Article", "id": "xde791cca"}, {"kind": "Video", "id": "671563221"}, {"kind": "Article", "id": "xc965e334"}, {"kind": "Video", "id": "671539973"}, {"kind": "Article", "id": "x8a4184ac"}, {"kind": "Video", "id": "671563220"}, {"kind": "Article", "id": "xeff1f265"}, {"kind": "Article", "id": "x5efe5ea7"}, {"kind": "Article", "id": "x6b876dca"}, {"kind": "Article", "id": "x93a739d7"}, {"kind": "Exercise", "id": "x45c3b18b"}], "children": [{"path": "khan/humanities/monarchy-enlightenment/neo-classicism/david-oath-of-the-horatii-1784/", "id": "Mawq5PKRB6k", "title": "David, Oath of the Horatii", "kind": "Video", "description": "Jacques-Louis David, Oath of the Horatii, oil on canvas, 1784 (Mus\u00e9e du Louvre)", "slug": "david-oath-of-the-horatii-1784"}, {"path": "khan/humanities/monarchy-enlightenment/neo-classicism/david-s-oath-of-the-horatii-quiz/", "id": "david-s-oath-of-the-horatii-quiz", "title": "David's Oath of the Horatii Quiz", "description": "This quiz is for the video David, Oath of the Horatii.", "slug": "david-s-oath-of-the-horatii-quiz", "kind": "Exercise"}, {"path": "khan/humanities/monarchy-enlightenment/neo-classicism/david-the-lictors-returning-to-brutus-the-bodies-of-his-sons-1789/", "id": "UQiNvDOJi0c", "title": "David, The Lictors Returning to Brutus the Bodies of His Sons", "kind": "Video", "description": "Jacques-Louis David, The Lictors Returning to Brutus the Bodies of His Sons, 1789, oil on canvas, 10' 7-1/8\" x 13' 10-1/8\" or 3.23 x 4.22m (Mus\u00e9e du Louvre, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "david-the-lictors-returning-to-brutus-the-bodies-of-his-sons-1789"}, {"path": "khan/humanities/monarchy-enlightenment/neo-classicism/family/", "id": "n_4UNkeqk8s", "title": "David, Study for The Lictors Bringing Brutus the Bodies of his Sons", "kind": "Video", "description": "Met curator Perrin Stein on subjectivity in Jacques-Louis David\u2019s Study for The Lictors Bringing Brutus the Bodies of his Sons, 1787.\n\nThis sheet is a compositional study for The Lictors Bringing Brutus the Bodies of his Sons (Mus\u00e9e du Louvre, Paris), painted by David on the eve of the French Revolution and exhibited shortly after the Fall of the Bastille. As with many of his iconic Neoclassical canvases, the subject was drawn from Roman history but found great resonance in the context of contemporary events. The canvas depicts an episode from the life of Lucius Junius Brutus, who put to an end the brutal r\u00e9gime of Tarquin, Rome\u2019s last king, and established the first Roman Empire, only to later find his two sons embroiled in a royalist conspiracy. True to his political convictions, Brutus condemned his sons to death. The novelty of David\u2019s painting is its focus, not on the executions, but on the wrenching domestic aftermath.\u00a0David\u2019s Neoclassical style is fully formed here and can be seen in the clean geometry of the architectural setting, the arrangement of the figures in a relief-like plane, the linear treatment of the forms, and the cool monochrome palette. The poses of the main figures, from the brooding Brutus cast in shadow at the left, to his anguished wife and daughters to the right, as well as the furniture and accessories, are all based on antiquities copied by the artist while he was a student in Rome.\n\nView this work on metmuseum.org.\u00a0\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "family"}, {"path": "khan/humanities/monarchy-enlightenment/neo-classicism/david-marat/", "id": "Hw2_hv439Fg", "title": "Jacques-Louis David, The Death of Marat", "kind": "Video", "description": "Jacques-Louis David, The Death of Marat, 1793, oil on canvas, 65 x 50-1/2 inches (Royal Museums of Fine Arts of Belgium, Brussels)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "david-marat"}, {"path": "khan/humanities/monarchy-enlightenment/neo-classicism/david-the-intervention-of-the-sabine-women-1799/", "id": "ovOKjwLE4qA", "title": "David, The Intervention of the Sabine Women", "kind": "Video", "description": "Jacques-Louis David, The Intervention of the Sabine Women, 1799, Oil on canvas, 12 feet, 8 inches x 17 feet and 3/4 of an inch or 3.85 x 5.22 m (Mus\u00e9e du Louvre, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\n\u00a0\n\nAt this juncture the Sabine women, from the outrage on whom the war originated,\u00a0\n\nwith hair dishevelled and garments rent, the timidity of their sex being overcome\u00a0\n\nby such dreadful scenes, had the courage to throw themselves amid the flying\u00a0\n\nweapons, and making a rush across, to part the incensed armies, and assuage their\u00a0\n\nfury; imploring their fathers on the one side, their husbands on the other, \"that as\u00a0\n\nfathers-in-law and sons-in-law they would not contaminate each other with impious\u00a0\n\nblood, nor stain their offspring with parricide, the one their grandchildren, the other\u00a0\n\ntheir children. If you are dissatisfied with the affinity between you, if with our\u00a0\n\nmarriages, turn your resentment against us; we are the cause of war, we of wounds\u00a0\n\nand of bloodshed to our husbands and parents. It were better that we perish than\u00a0\n\nlive widowed or fatherless without one or other of you.\" The silence affects both the multitudes and the leaders. Silence and sudden suspension ensue. Upon this the leaders come forward in order to concert a treaty, and they not only conclude a peace, but form one state out of two.\u00a0\n\nLivy,\u00a0The History of Rome\u00a0tranlated by D. Spillan, London: Bohn, 1849: book 1, section 13,\u00a0\n\npage 19", "slug": "david-the-intervention-of-the-sabine-women-1799"}, {"path": "khan/humanities/monarchy-enlightenment/neo-classicism/jacques-louis-david-the-emperor-napoleon-in-his-study-at-the-tuileries-1812/", "id": "Go5nAAwQnpA", "title": "David, The Emperor Napoleon in His Study at the Tuileries", "kind": "Video", "description": "Jacques-Louis David, The Emperor Napoleon in His Study at the Tuileries, 1812, oil on canvas 80-1/4 x 49-1/4 inches (National Gallery of Art) For more videos see http://www.smarthistory.org", "slug": "jacques-louis-david-the-emperor-napoleon-in-his-study-at-the-tuileries-1812"}, {"path": "khan/humanities/monarchy-enlightenment/neo-classicism/girodet-the-sleep-of-endymion-1791/", "id": "2B68DWcOLj0", "title": "Girodet, The Sleep of Endymion", "kind": "Video", "description": "Anne-Louis Girodet de Roussy-Trioson, The Sleep of Endymion, 1791, oil on canvas, 1.98 x 2.61m (6 feet 5-\u00be inches x 8 feet 6-\u00be inches), exhibited in the salons of 1793 and 1814 (Mus\u00e9e du Louvre, Paris) Speakers: Drs. Beth Harris and Steven Zucker", "slug": "girodet-the-sleep-of-endymion-1791"}, {"path": "khan/humanities/monarchy-enlightenment/neo-classicism/neoclassicism/", "id": "neoclassicism", "title": "Neoclassicism", "description": "Test your knowledge!", "slug": "neoclassicism", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Jacques Louis David invented a style reflecting Enlightenment ideas by looking back to ancient art. He became a revolutionary and 1st painter to Napoleon.", "node_slug": "neo-classicism", "render_type": "Tutorial", "topic_page_url": "/humanities/monarchy-enlightenment/neo-classicism", "extended_slug": "humanities/monarchy-enlightenment/neo-classicism", "kind": "Topic", "slug": "neo-classicism"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/britain-18c/", "id": "britain-18c", "hide": false, "title": "British art in the 18th century", "child_data": [{"kind": "Topic", "id": "x0228f4cc"}, {"kind": "Topic", "id": "xb7574aa2"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/", "id": "britain-ageof-revolution", "hide": false, "title": "British art in the eighteenth century", "child_data": [{"kind": "Article", "id": "x1817af21"}, {"kind": "Video", "id": "x46f1afe6"}, {"kind": "Exercise", "id": "x952d5394"}, {"kind": "Article", "id": "xb68565d7"}, {"kind": "Exercise", "id": "x9e9b212a"}, {"kind": "Article", "id": "xbee59f1a"}, {"kind": "Video", "id": "671563222"}, {"kind": "Video", "id": "x7f41aff0"}, {"kind": "Video", "id": "x1d86102f"}, {"kind": "Video", "id": "xe56461be"}, {"kind": "Video", "id": "x9891e497"}], "children": [{"path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/william-hogarth-s-marriage-a-la-mode-c-1743/", "id": "mFJ9tHJA2Sw", "title": "William Hogarth, Marriage A-la-Mode (including T\u00eate \u00e0 T\u00eate)", "kind": "Video", "description": "William Hogarth, Marriage A-la-Mode, c. 1743, oil on canvas, 69.9 x 90.8 cm (The National Gallery, London)\n1. The Marriage Settlement\n2. The T\u00eate \u00e0 T\u00eate\n3, The Inspection\n4. The Toilette\n5. The Bagnio\n6. The Lady's Death\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "william-hogarth-s-marriage-a-la-mode-c-1743"}, {"path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/marriage-a-la-mode-quiz/", "id": "marriage-a-la-mode-quiz", "title": "Marriage a la Mode Quiz", "description": "Test your knowledge on this object.", "slug": "marriage-a-la-mode-quiz", "kind": "Exercise"}, {"path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/reynolds-lady-cockburn-and-her-three-eldest-sons-1773/", "id": "NX3M0NTYTYg", "title": "Reynolds, Lady Cockburn and Her Three Eldest Sons", "kind": "Video", "description": "Sir Joshua Reynolds, Lady Cockburn and Her Three Eldest Sons, 1773, oil on canvas, 55-3/4 x 44-1/2 inches (141.5 x 113 cm) (National Gallery, London) Speakers: Pippa Couch and Rachel Ropeik", "slug": "reynolds-lady-cockburn-and-her-three-eldest-sons-1773"}, {"path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/room-1650-1730/", "id": "SRg_XB83-tw", "title": "Room: 1650-1730", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Tim Batchelor explores the period 1650-1730.\n\nLearn more about the art featured in this video:\n- Jan Siberechts, View of a House and its Estate in Belsize, Middlesex, 1696\n-\u00a0Mary Beale, Portrait of a Young Girl, 1681\n- Mary Beale, Sketch of the Artist's Son, Bartholomew Beale, in Profile, 1660", "slug": "room-1650-1730"}, {"path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/room-1730-1765/", "id": "g0iKG-ieZ2s", "title": "Room: 1730-1765", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Tim Batchelor explores the period 1730-1765.\n\nLearn more about the art featured in this video:\n-\u00a0William Hogarth, The Painter and his Pug, 1745\n-\u00a0Thomas Gainsborough, Wooded Landscape with a Peasant Resting, 1747", "slug": "room-1730-1765"}, {"path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/room-1760-1780/", "id": "Rb7NsHUw384", "title": "Room: 1760-1780", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Greg Sullivan explores the period 1760-1780.\n\nLearn more about the art featured in this video:\n-\u00a0Sir Joshua Reynolds, Colonel Acland and Lord Sydney: The Archers, 1769\n-\u00a0Benjamin West, Pylades and Orestes Brought as Victims before Iphigenia, 1766\n-\u00a0Nathaniel Hone, Sketch for \u2018The Conjuror\u2019. 1775", "slug": "room-1760-1780"}, {"path": "khan/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution/room-1780-1810/", "id": "LkjyVZMyMaY", "title": "Room: 1780-1810", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Greg Sullivan explores the period 1780-1810.\n\nLearn more about the art featured in this video:\n- Philip James De Loutherbourg, The Battle of Camperdown, 1799\n-\u00a0Thomas Daniell, Sir Charles Warre Malet, Concluding a Treaty in 1790 in Durbar with the Peshwa of the Maratha Empire,\u00a01805\n-\u00a0Johan Zoffany, Colonel Mordaunt\u2019s Cock Match, 1784\u20136", "slug": "room-1780-1810"}], "in_knowledge_map": false, "description": "", "node_slug": "britain-ageof-revolution", "render_type": "Tutorial", "topic_page_url": "/humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution", "extended_slug": "humanities/monarchy-enlightenment/britain-18c/britain-ageof-revolution", "kind": "Topic", "slug": "britain-ageof-revolution"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/humanities/monarchy-enlightenment/britain-18c/age-revolution-quiz/", "id": "age-revolution-quiz", "hide": false, "title": "Age of revolution (quiz)", "child_data": [{"kind": "Exercise", "id": "x9309a878"}], "children": [{"path": "khan/humanities/monarchy-enlightenment/britain-18c/age-revolution-quiz/art-in-britain-and-america-in-the-age-of-revolution/", "id": "art-in-britain-and-america-in-the-age-of-revolution", "title": "Art in Britain and America in the age of revolution", "description": "Test your knowledge", "slug": "art-in-britain-and-america-in-the-age-of-revolution", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "age-revolution-quiz", "render_type": "Tutorial", "topic_page_url": "/humanities/monarchy-enlightenment/britain-18c/age-revolution-quiz", "extended_slug": "humanities/monarchy-enlightenment/britain-18c/age-revolution-quiz", "kind": "Topic", "slug": "age-revolution-quiz"}], "in_knowledge_map": false, "description": "Britain and America were at war but shared a common artistic tradition. From Hogarth\u2019s biting satire to Jefferson\u2019s Monticello\u2014here is invention, wit, nobility.", "node_slug": "britain-18c", "render_type": "Topic", "topic_page_url": "/humanities/monarchy-enlightenment/britain-18c", "extended_slug": "humanities/monarchy-enlightenment/britain-18c", "kind": "Topic", "slug": "britain-18c"}], "in_knowledge_map": false, "description": "1600-1800: Bernini, Rembrandt, Velazquez and more.", "node_slug": "monarchy-enlightenment", "render_type": "Subject", "topic_page_url": "/humanities/monarchy-enlightenment", "extended_slug": "humanities/monarchy-enlightenment", "kind": "Topic", "slug": "monarchy-enlightenment"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-americas/", "id": "art-americas", "hide": false, "title": "Art of the Americas to World War I", "child_data": [{"kind": "Topic", "id": "x547a0861"}, {"kind": "Topic", "id": "x3a9cd273"}, {"kind": "Topic", "id": "x6c8f3ba6"}, {"kind": "Topic", "id": "xebec7068"}, {"kind": "Topic", "id": "x8e66f4bc"}, {"kind": "Topic", "id": "xfa64698d"}, {"kind": "Topic", "id": "x8a0bf09a"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-americas/early-cultures/", "id": "early-cultures", "hide": false, "title": "North America before European colonization", "child_data": [{"kind": "Topic", "id": "xb2789a4d"}, {"kind": "Topic", "id": "x6308c0b1"}, {"kind": "Topic", "id": "xd5ad7deb"}, {"kind": "Topic", "id": "xa3fca747"}, {"kind": "Topic", "id": "x0d7841ad"}, {"kind": "Topic", "id": "x5a84f140"}, {"kind": "Topic", "id": "x98f19775"}, {"kind": "Topic", "id": "xf82cd15b"}, {"kind": "Topic", "id": "xe5a23230"}, {"kind": "Topic", "id": "x16af6fd9"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/early-cultures/olmec/", "id": "olmec", "hide": false, "title": "Olmec", "child_data": [{"kind": "Video", "id": "xf301545c"}, {"kind": "Article", "id": "xf46b9e0f"}, {"kind": "Video", "id": "x8a3a575c"}, {"kind": "Video", "id": "x66cf2351"}, {"kind": "Article", "id": "x02900cc4"}, {"kind": "Article", "id": "xd2e74d3c"}], "children": [{"path": "khan/humanities/art-americas/early-cultures/olmec/olmec-mask/", "id": "D9uJxXnDTU8", "title": "Olmec mask (Olmec-style mask)", "kind": "Video", "description": "Olmec mask (Olmec-style mask), c. 1200 - 400 B.C.E., jadeite, 4 x 3-3/8 x 1-1/4 inches found in offering 20 buried c. 1470 C.E. at the Aztec Templo Mayor (Museo del Templo Mayor, Mexico City)\nSpeakers: Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker\n\nItems buried in offerings included ceramic vessels, stone sculptures, obsidian blades, seashells, greenstone, and objects gathered from earlier locales (like Olmec sites and the city of Teotihuacan).\u00a0The Olmecs are known as \u201crubber people,\u201d a name given to the peoples of the Gulf Coast after the Spanish Conquest. We don\u2019t know what they called themselves.\u00a0Jadeite was quarried in the Sierra de las Minas in Guatemala, and was imported to the Gulf Coast of Mexico.\u00a0Items acquired via trade or tribute [by the Aztecs] included feathers, obsidian, jadeite, cotton, cacao, and turquoise.", "slug": "olmec-mask"}, {"path": "khan/humanities/art-americas/early-cultures/olmec/face/", "id": "A00qfA9bE84", "title": "Mask", "kind": "Video", "description": "Met curator Joanne Pillsbury on immortality in Mask,\u00a010th\u20136th century B.C.E.,\u00a0by the Olmec peoples of ancient Mexico.\n\nDepicting a typical Olmec face with slanted, almond-shaped eyes and a toothless, slightly downturned mouth, this mask is rendered with simplicity and elegance. Its harmonious proportions are indicative of the sophistication attained by Olmec sculptors. The smooth, highly polished planes of cheek, forehead, and chin plus the almost fleshy quality of the nose and parted lips belie the incredible hardness of the jadeite cobble from which the mask was made. The face itself is neither human nor supernatural but, rather, an idealized type that incorporates otherworldly aspects\u2014such as the mouth, with its reference to the so-called were-jaguar, a powerful mythic being with human and jaguar traits.\n\nMasks of this size in stone have not been excavated in archaeological sites and it is difficult to determine their function. Lacking holes for eyes and nose, it could not have been worn over a living face, but there are attachment holes along the edges by means of which it might have been used as a costume element or adhered as a face to a mummy or a sacred bundle. There is a polished, circular depression on the back of the mask.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "face"}, {"path": "khan/humanities/art-americas/early-cultures/olmec/kunz-axe/", "id": "qfz1k_yU3d4", "title": "Kunz Axe", "kind": "Video", "description": "Votive Adze \"Kunz Axe,\" (Olmec Formative Period), c. 1200-500 B.C.E., jadeite, 31 x 16 x 11 cm (American Museum of Natural History) Speakers: Dr. Rex Koonz and Dr. Steven Zucker", "slug": "kunz-axe"}], "in_knowledge_map": false, "description": "The Olmecs lived in the low-lying Gulf Coast of what is now Mexico about 1200-400 B.C.E. at sites such as San Lorenzo and La Venta. These and the other Olmec centers included many of the features that would be associated with later civilizations in Central America including the Mexica (Aztecs) and Maya. Alongside impressive architecture, there is evidence of a ceremonial ball game and complex astrological calendars.", "node_slug": "olmec", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/early-cultures/olmec", "extended_slug": "humanities/art-americas/early-cultures/olmec", "kind": "Topic", "slug": "olmec"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/early-cultures/tlatilco/", "id": "tlatilco", "hide": false, "title": "Tlatilco", "child_data": [{"kind": "Video", "id": "x470cce5d"}, {"kind": "Article", "id": "x9d4921f7"}], "children": [{"path": "khan/humanities/art-americas/early-cultures/tlatilco/tlatilco-figurines/", "id": "Q3DpCMAyWyw", "title": "Tlatilco figurines", "kind": "Video", "description": "Tlatilco figurines (from the National Museum of Anthropology, but also including the Female Figure at the Princeton University Art Museum), ceramic, Tlatilco, Mesoamerica (present-day Mexico), c. 1200\u2013600 B.C.E. \u00a0Speakers: Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker.\n\nTlatilco is a Nahuatl word, given to this \u201cculture\u201d later. It means \u201cplace of hidden things.\u201d We don\u2019t know what the people here called themselves. Around 2000 B.C.E., maize, squash and other crops were domesticated, which allowed people to settle in villages. The settlement of Tlatilco was located close to a lake, and fishing and the hunting of birds became important food sources.\n\nArchaeologists have found more than 340 burials at Tlatilco, with many more destroyed in the first half of the 20th century.", "slug": "tlatilco-figurines"}], "in_knowledge_map": false, "description": "Tlatilco was one village of several spread around the great lake that once formed the center of what is today Mexico City. Tlatilco figurines are wonderful small ceramic figures, often of women, found in Central Mexico from 1500-1200 B.C.E. Some of the motifs found on other Tlatilco ceramics, such as ducks and fish, would have come directly from their lakeside surroundings.", "node_slug": "tlatilco", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/early-cultures/tlatilco", "extended_slug": "humanities/art-americas/early-cultures/tlatilco", "kind": "Topic", "slug": "tlatilco"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/early-cultures/classic-veracruz/", "id": "Classic-Veracruz", "hide": false, "title": "Classic Veracruz culture", "child_data": [{"kind": "Video", "id": "xdcb813bf"}], "children": [{"path": "khan/humanities/art-americas/early-cultures/classic-veracruz/the-mesoamerican-ballgame-and-a-classic-veracruz-yoke/", "id": "4dpE80AU-oI", "title": "The Mesoamerican Ballgame and a Classic Veracruz yoke", "kind": "Video", "description": "Yoke, c. 1 - 900 C.E., Classic Veracruz culture, greenstone, 11.5 x 38 x 41.5 cm (American Museum of Natural History)\n\nSpeakers: Dr. Rex Koontz and Dr. Steven Zucker", "slug": "the-mesoamerican-ballgame-and-a-classic-veracruz-yoke"}], "in_knowledge_map": false, "description": "Learn about Classic Veracruz culture along what is now the gulf coast of Mexico", "node_slug": "Classic-Veracruz", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/early-cultures/Classic-Veracruz", "extended_slug": "humanities/art-americas/early-cultures/Classic-Veracruz", "kind": "Topic", "slug": "classic-veracruz"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/early-cultures/aztec-mexica/", "id": "aztec-mexica", "hide": false, "title": "Aztec (Mexica)", "child_data": [{"kind": "Article", "id": "xa678a96d"}, {"kind": "Video", "id": "x438cb50e"}, {"kind": "Article", "id": "xe7dd591b"}, {"kind": "Article", "id": "xf5ed4352"}, {"kind": "Video", "id": "xdfd0ab08"}, {"kind": "Video", "id": "x8af81224"}, {"kind": "Article", "id": "x5c1d4ed9"}, {"kind": "Article", "id": "x0c8f2e24"}, {"kind": "Article", "id": "x4e90410e"}, {"kind": "Article", "id": "xac3a4069"}, {"kind": "Article", "id": "x43719946"}, {"kind": "Video", "id": "x90ee2a94"}], "children": [{"path": "khan/humanities/art-americas/early-cultures/aztec-mexica/coatlicue/", "id": "DRlE85xYqzE", "title": "Coatlicue", "kind": "Video", "description": "Coatlicue, c. 1500, Mexica (Aztec), found on the SE edge of the Plaza mayor/Zocalo in Mexico City, basalt, \u00a0257 cm high (National Museum of Anthropology, Mexico City)\nA conversation with Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker", "slug": "coatlicue"}, {"path": "khan/humanities/art-americas/early-cultures/aztec-mexica/sun-stone/", "id": "Zn03u3-U1fk", "title": "The Sun Stone (The Calendar Stone)", "kind": "Video", "description": "The Sun Stone (or The Calendar Stone), Aztec, reign of Moctezuma II (1502-20), discovered in 1790 at the southeastern edge of the Plaza Mayor (Zocalo) in Mexico City, stone (unfinished), 358 cm diameter x 98 cm depth (Museo Nacional de Antropolog\u00eda)\n\nSpeakers: Dr. Lauren Kilroy-Ewbank and Dr. Beth Harris", "slug": "sun-stone"}, {"path": "khan/humanities/art-americas/early-cultures/aztec-mexica/coyolxauhqui-monolith/", "id": "Z1rqLNz8Zo0", "title": "Coyolxauhqui Stone", "kind": "Video", "description": "Coyolxauhqui Monolith (Aztec), c. 1500, volcanic stone, found Templo Mayor, Tenochtitlan, excavated 1978 (Museo del Templo Mayor, Mexico City)\nSpeakers: Dr. Beth Harris and Dr. Lauren Kilroy-Ewbank", "slug": "coyolxauhqui-monolith"}, {"path": "khan/humanities/art-americas/early-cultures/aztec-mexica/feathered-headdress-aztec/", "id": "Q_Lp76ZkDE0", "title": "Feathered headdress", "kind": "Video", "description": "Feathered headdress, Aztec, reproduction (National Anthropology Museum, Mexico City) Original: Feathered headdress, Mexico, Aztec, early 16th century, quetzal, cotinga, roseate spoonbill, piaya feathers; wood, fibers, amate paper, cotton, gold, gilded brass (World Museum, Vienna)\n\nThe headdress is also called the \u201cPenacho of Moctezuma II.\u201d\n\n\u201cMoctezuma II\u2019s Headdress\u201d was first mentioned in a European inventory in 1596, when it was acquired by Austrian Archduke Ferdinand II von Tyrol. It was listed there as \u201ca Moorish hat.\u201d\u00a0It was likely an object sent from Mesoamerica\u00a0to Europe by Hernan Cortes, but it is unknown whether it actually belonged to Moctezuma II himself.\n\nA conversation with Dr. Lauren Kilroy-Ewbank and Dr. Beth Harris", "slug": "feathered-headdress-aztec"}], "in_knowledge_map": false, "description": "The Aztec (or Mexica as they called themselves) were a small and obscure tribe when they settled in the Valley of Mexico and founded their capital, Tenochtitlan, in 1345. At the beginning of the sixteenth century Tenochtitlan (now Mexico City) was one of the largest cities in the world and the Mexica empire stretched from the Atlantic to the Pacific and into Guatemala and Nicaragua. Hern\u00e1n Cort\u00e9s and his small Spanish army arrived in 1519 and overthrew the Mexica ruler Moctezuma Xocoyotzin.", "node_slug": "aztec-mexica", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/early-cultures/aztec-mexica", "extended_slug": "humanities/art-americas/early-cultures/aztec-mexica", "kind": "Topic", "slug": "aztec-mexica"}], "in_knowledge_map": false, "description": "Learn about the the early peoples and places in the Americas from Alaska to Panama", "node_slug": "early-cultures", "render_type": "Topic", "topic_page_url": "/humanities/art-americas/early-cultures", "extended_slug": "humanities/art-americas/early-cultures", "kind": "Topic", "slug": "early-cultures"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-americas/south-america-early/", "id": "south-america-early", "hide": false, "title": "South America before European colonization", "child_data": [{"kind": "Topic", "id": "xce82699b"}, {"kind": "Topic", "id": "x59fe7700"}, {"kind": "Topic", "id": "x7b91f6b0"}, {"kind": "Topic", "id": "xe7390d61"}, {"kind": "Topic", "id": "x3db352de"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/south-america-early/inca-art/", "id": "inca-art", "hide": false, "title": "Inka", "child_data": [{"kind": "Article", "id": "x90fabe83"}, {"kind": "Article", "id": "xee6c73af"}, {"kind": "Article", "id": "x3ab73dc7"}, {"kind": "Article", "id": "x39740fc8"}, {"kind": "Article", "id": "x86610993"}, {"kind": "Article", "id": "xcb59fdf4"}, {"kind": "Video", "id": "xd0f9f50a"}], "children": [{"path": "khan/humanities/art-americas/south-america-early/inca-art/inca-ushnus/", "id": "oT9NdKpUwdU", "title": "Inka ushnus: landscape, site and symbol in the Andes", "kind": "Video", "description": "For three years, a research team from the British Museum, the University of Reading, Royal Holloway University of London and the Universidad Nacional de San Cristobal de Huamanga set out to discover how the Inca Empire used a stone platform known as an ushnu as a symbol of political power.\nBy enhancing our knowledge of how ushnus were built, their symbolism, what activities took place on them and what artifacts might be found around them, the project has increased our understanding of Inca culture and how they conquered the Andes to become one of the world\u2019s most successful civilisations. \u00a9 Trustees of the British Museum", "slug": "inca-ushnus"}], "in_knowledge_map": false, "description": "From their capital, Cuzco, in the central Peruvian Andes, the Inca created a huge empire reaching over 2,400 miles along the length of the Andes. The supreme head of state was the king, considered a living god ruling by divine right and the royal family controlled important areas of government such as the army.", "node_slug": "inca-art", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/south-america-early/inca-art", "extended_slug": "humanities/art-americas/south-america-early/inca-art", "kind": "Topic", "slug": "inca-art"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/south-america-early/ancient-colombia/", "id": "ancient-colombia", "hide": false, "title": "Ancient Colombian chiefdoms", "child_data": [{"kind": "Article", "id": "x6285309d"}, {"kind": "Article", "id": "x9f25029c"}, {"kind": "Article", "id": "x45cb1b4c"}, {"kind": "Video", "id": "x6d736388"}, {"kind": "Video", "id": "xdaa1bffe"}, {"kind": "Video", "id": "x84d2683b"}], "children": [{"path": "khan/humanities/art-americas/south-america-early/ancient-colombia/hammer-and-fire/", "id": "LSG6w2Np_rk", "title": "By hammer and fire: Goldmaking techniques of the ancient Colombians", "kind": "Video", "description": "By hammer and fire (a martillo y fuego), Goldmaking techniques of the ancient Colombians \u00a9 Trustees of the British Museum", "slug": "hammer-and-fire"}, {"path": "khan/humanities/art-americas/south-america-early/ancient-colombia/depletion-gilding/", "id": "5M0vOHFm3Ww", "title": "Depletion gilding: Goldmaking techniques of the ancient Colombians", "kind": "Video", "description": "Depletion gilding (dorado por oxidaci\u00f3n). The gold-making techniques of the ancient Colombians. \u00a9 Trustees of the British Museum", "slug": "depletion-gilding"}, {"path": "khan/humanities/art-americas/south-america-early/ancient-colombia/wax-to-metal/", "id": "v2Tz76UkTkY", "title": "From wax to metal: Goldmaking techniques of the ancient Colombians", "kind": "Video", "description": "From wax to metal (de la cera al metal), Goldmaking techniques of the ancient Colombians \u00a9 Trustees of the British Museum", "slug": "wax-to-metal"}], "in_knowledge_map": false, "description": "For centuries Europeans were dazzled by the legend of El Dorado, a lost city of gold in South America. El Dorado\u2013literally \u201cthe golden one\u201d\u2013actually refers to the ritual that took place at Lake Guatavita, near modern Bogot\u00e1. The newly elected leader, covered in powdered gold, dived into the lake and emerged as the new chief of the Muisca people who lived in the central highlands of present-day Colombia's Eastern Range.", "node_slug": "ancient-colombia", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/south-america-early/ancient-colombia", "extended_slug": "humanities/art-americas/south-america-early/ancient-colombia", "kind": "Topic", "slug": "ancient-colombia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/south-america-early/amazonian-people/", "id": "amazonian-people", "hide": false, "title": "Amazonian peoples", "child_data": [{"kind": "Article", "id": "x5d7748ca"}, {"kind": "Video", "id": "x6a094116"}, {"kind": "Video", "id": "x31622f8f"}], "children": [{"path": "khan/humanities/art-americas/south-america-early/amazonian-people/kayap-headdress-a-glimpse-of-life-in-the-amazon-rainforest/", "id": "irYfbY_jryY", "title": "Kayap\u00f3 Headdress: a glimpse of life in the Amazon rainforest", "kind": "Video", "description": "Headdress, 20th century, feathers (Anodorhynchus hyacinthinus and Psarocolius decumanus) and plant materials, approximately 1 m x 60 cm, Kayap\u00f3 (Cayapo) people, Para, Brazil (The British Museum)\nSpeakers: Dr. Jago Cooper (Curator, Head of the Americas, \u00a0The British Museum) and Dr. Steven Zucker\n\nSpecial thanks to Dr. Jago Cooper, Matthew Cock, Kate Jarvis and The British Museum", "slug": "kayap-headdress-a-glimpse-of-life-in-the-amazon-rainforest"}, {"path": "khan/humanities/art-americas/south-america-early/amazonian-people/munduruku-headdress-a-glimpse-of-life-in-the-amazon-rainforest/", "id": "d7b38SLI6nc", "title": "Munduruku\u0301 Headdress: a glimpse of life in the Amazon rainforest", "kind": "Video", "description": "A conversation between Dr. Jago Cooper (Curator, Head of the Americas, The British Museum) and Dr. Steven Zucker in front of: Headdress (coifa), before 1869, Arara, Mutum and Macaw(?) feathers, cord, 40 x 24 cm, Munduruk\u00fa people, Para, Brazil (The British Museum)\nSpecial thanks to Dr. Jago Cooper, Kate Jarvis, Matthew Cock, and The British Museum", "slug": "munduruku-headdress-a-glimpse-of-life-in-the-amazon-rainforest"}], "in_knowledge_map": false, "description": "The vast reaches of the Amazonian rainforest have been shaped by human hands for thousands of years. Long before Europeans arrived in the Americas this deep history of human interaction with river and forest gave rise to enduring cultural traditions and sophisticated art styles.", "node_slug": "amazonian-people", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/south-america-early/amazonian-people", "extended_slug": "humanities/art-americas/south-america-early/amazonian-people", "kind": "Topic", "slug": "amazonian-people"}], "in_knowledge_map": false, "description": "", "node_slug": "south-america-early", "render_type": "Topic", "topic_page_url": "/humanities/art-americas/south-america-early", "extended_slug": "humanities/art-americas/south-america-early", "kind": "Topic", "slug": "south-america-early"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-americas/new-spain/", "id": "new-spain", "hide": false, "title": "Spanish colonies in the Americas", "child_data": [{"kind": "Topic", "id": "x8d475f48"}, {"kind": "Topic", "id": "xfdf95184"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/new-spain/viceroyalty-new-spain/", "id": "viceroyalty-new-spain", "hide": false, "title": "Viceroyalty of New Spain", "child_data": [{"kind": "Video", "id": "xf1f01e94"}, {"kind": "Article", "id": "x127691ba"}, {"kind": "Article", "id": "x7a32bfce"}, {"kind": "Article", "id": "x0df8d6f8"}, {"kind": "Article", "id": "x45aa4398"}, {"kind": "Article", "id": "x8d9eea00"}, {"kind": "Article", "id": "x36367ba7"}, {"kind": "Video", "id": "x0ce01d2d"}, {"kind": "Article", "id": "xb9f8df53"}, {"kind": "Article", "id": "xfb27759c"}], "children": [{"path": "khan/humanities/art-americas/new-spain/viceroyalty-new-spain/virgin-of-guadalupe/", "id": "imkOrmHtSJ0", "title": "Virgin of Guadalupe", "kind": "Video", "description": "Virgin of Guadalupe, late 17th century, 190 cm high, oil paint, gilding, and mother of pearl on panel (Franz Mayer Museum, Mexico City). Speakers: Dr. Lauren Kilroy-Ewbank and Dr. Beth Harris", "slug": "virgin-of-guadalupe"}, {"path": "khan/humanities/art-americas/new-spain/viceroyalty-new-spain/brooklyn-biombo/", "id": "jT0hslicvFc", "title": "Screen with the Siege of Belgrade and Hunting Scene (Brooklyn Biombo)", "kind": "Video", "description": "Circle of the Gonzales family (artist), c. 1697-1701, Mexico, oil on wood, inlaid with mother-of-pearl, 229.9 x 275.8 cm (Brooklyn Museum and Museo Nacional del Virreinato - INAH, Tepotzotl\u00e1n)\nSpeakers: Dr. Lauren G. Kilroy-Ewbank and Dr. Steven Zucker", "slug": "brooklyn-biombo"}], "in_knowledge_map": false, "description": "", "node_slug": "viceroyalty-new-spain", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/new-spain/viceroyalty-new-spain", "extended_slug": "humanities/art-americas/new-spain/viceroyalty-new-spain", "kind": "Topic", "slug": "viceroyalty-new-spain"}], "in_knowledge_map": false, "description": "Art and culture from the European invasion of the Americas to the end of the colonial era with a focus on one of the most remarkable examples of cross cultural influence ever made.", "node_slug": "new-spain", "render_type": "Topic", "topic_page_url": "/humanities/art-americas/new-spain", "extended_slug": "humanities/art-americas/new-spain", "kind": "Topic", "slug": "new-spain"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-americas/british-colonies/", "id": "british-colonies", "hide": false, "title": "British Colonies to the Early Republic", "child_data": [{"kind": "Topic", "id": "x998f2931"}, {"kind": "Topic", "id": "x89399f7b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/british-colonies/colonial-period/", "id": "colonial-period", "hide": false, "title": "Colonial period", "child_data": [{"kind": "Article", "id": "x29e7a877"}, {"kind": "Article", "id": "x9dd229df"}, {"kind": "Article", "id": "x38a6e9d7"}, {"kind": "Video", "id": "719842162"}, {"kind": "Article", "id": "x7bb6be40"}, {"kind": "Article", "id": "xee010eaf"}], "children": [{"path": "khan/humanities/art-americas/british-colonies/colonial-period/john-singleton-copley-a-boy-with-a-flying-squirrel-henry-pelham-1765/", "id": "60u_ctp6UIw", "title": "Copley, Boy with a Squirrel", "kind": "Video", "description": "John Singleton Copley, A Boy with a Flying Squirrel (Henry Pelham), 1765, 77.15 x 63.82 cm / 30-3/8 x 25-1/8 inches (Museum of Fine Arts, Boston)", "slug": "john-singleton-copley-a-boy-with-a-flying-squirrel-henry-pelham-1765"}], "in_knowledge_map": false, "description": "", "node_slug": "colonial-period", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/british-colonies/colonial-period", "extended_slug": "humanities/art-americas/british-colonies/colonial-period", "kind": "Topic", "slug": "colonial-period"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-americas/british-colonies/early-republic/", "id": "early-republic", "hide": false, "title": "Early Republic", "child_data": [{"kind": "Article", "id": "xba124e24"}, {"kind": "Article", "id": "x618f7ca3"}, {"kind": "Article", "id": "xe7e5c1f0"}, {"kind": "Article", "id": "x5d1fadb0"}, {"kind": "Exercise", "id": "xde418c83"}, {"kind": "Video", "id": "719842163"}, {"kind": "Article", "id": "x28cfd2a0"}], "children": [{"path": "khan/humanities/art-americas/british-colonies/early-republic/monticello-quiz/", "id": "monticello-quiz", "title": "Monticello Quiz", "description": "This quiz is for the essay Jefferson, Monticello.", "slug": "monticello-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-americas/british-colonies/early-republic/charles-willson-peale-staircase-group-portrait-of-raphaelle-peale-and-titian-ramsay-peale-1795/", "id": "Vm1_vSny4BY", "title": "Peale, Staircase Group (Portrait of Raphaelle Peale and Titian Ramsay Peale)", "kind": "Video", "description": "Charles Willson Peale, Staircase Group (Portrait of Raphaelle Peale and Titian Ramsay Peale), 1795, oil on canvas, 89-1/2 x 39-3/8 inches / 227.3 x 100 cm (Philadelphia Museum of Art). View this work up close in the Google Art Project.", "slug": "charles-willson-peale-staircase-group-portrait-of-raphaelle-peale-and-titian-ramsay-peale-1795"}], "in_knowledge_map": false, "description": "", "node_slug": "early-republic", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/british-colonies/early-republic", "extended_slug": "humanities/art-americas/british-colonies/early-republic", "kind": "Topic", "slug": "early-republic"}], "in_knowledge_map": false, "description": "", "node_slug": "british-colonies", "render_type": "Topic", "topic_page_url": "/humanities/art-americas/british-colonies", "extended_slug": "humanities/art-americas/british-colonies", "kind": "Topic", "slug": "british-colonies"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-americas/us-art-19c/", "id": "us-art-19c", "hide": false, "title": "Art of the United States in the 19th century", "child_data": [{"kind": "Topic", "id": "x6ee42f87"}, {"kind": "Topic", "id": "x77d377e4"}, {"kind": "Topic", "id": "xb4051a3d"}, {"kind": "Topic", "id": "xafc19c42"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-americas/us-art-19c/romanticism-us/", "id": "romanticism-us", "hide": false, "title": "Romanticism in the United States", "child_data": [{"kind": "Video", "id": "719781803"}, {"kind": "Video", "id": "719624693"}, {"kind": "Video", "id": "x5cceda7d"}, {"kind": "Article", "id": "xcd1e5a83"}, {"kind": "Exercise", "id": "xbdc995a3"}, {"kind": "Article", "id": "x8f20d390"}, {"kind": "Article", "id": "x44a25d66"}, {"kind": "Article", "id": "x57272a72"}, {"kind": "Video", "id": "719842164"}, {"kind": "Exercise", "id": "x7f3d1ed2"}], "children": [{"path": "khan/humanities/art-americas/us-art-19c/romanticism-us/washington-allston-elijah-in-the-desert-1818/", "id": "H95wT4wT95w", "title": "Allston, Elijah in the Desert", "kind": "Video", "description": "Washington Allston, Elijah in the Desert, 1818, oil on canvas, 125.09 x 184.78 cm / 49 1/4 x 72 3/4 inches (Museum of Fine Arts, Boston)", "slug": "washington-allston-elijah-in-the-desert-1818"}, {"path": "khan/humanities/art-americas/us-art-19c/romanticism-us/thomas-cole-expulsion-from-the-garden-of-eden-1828/", "id": "dBrKCtx4TfA", "title": "Cole, Expulsion from the Garden of Eden", "kind": "Video", "description": "Thomas Cole, Expulsion from the Garden of Eden, 1828, oil on canvas, 100.96 x 138.43 cm / 39-3/4 x 54-1/2 inches (Museum of Fine Arts, Boston)", "slug": "thomas-cole-expulsion-from-the-garden-of-eden-1828"}, {"path": "khan/humanities/art-americas/us-art-19c/romanticism-us/cole-oxbow/", "id": "RQ0855yB2ZM", "title": "Thomas Cole, The Oxbow", "kind": "Video", "description": "Thomas Cole, View from Mount Holyoke, Northampton, Massachusetts, after a Thunderstorm\u2014The Oxbow, 1836, oil on canvas, 51 1/2 x 76 inches / 130.8 x 193 cm (The Metropolitan Museum of Art) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "cole-oxbow"}, {"path": "khan/humanities/art-americas/us-art-19c/romanticism-us/cole-s-the-oxbow-quiz/", "id": "cole-s-the-oxbow-quiz", "title": "Cole's The Oxbow (quiz)", "description": "Test your knowledge.", "slug": "cole-s-the-oxbow-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-americas/us-art-19c/romanticism-us/fitz-henry-lane-owl-s-head-penobscot-bay-maine-1862/", "id": "ascpn9AjCIk", "title": "Lane, Owl's Head, Penobscot Bay, Maine", "kind": "Video", "description": "Fitz Henry Lane, Owl's Head, Penobscot Bay, Maine, 1862, oil on canvas, 40 x 66.36 cm / 15-3/4 x 26-1/8 inches (Museum of Fine Arts, Boston)", "slug": "fitz-henry-lane-owl-s-head-penobscot-bay-maine-1862"}, {"path": "khan/humanities/art-americas/us-art-19c/romanticism-us/romanticism-in-the-united-states/", "id": "romanticism-in-the-united-states", "title": "Romanticism in the United States", "description": "Test your knowledge!", "slug": "romanticism-in-the-united-states", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "romanticism-us", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/us-art-19c/romanticism-us", "extended_slug": "humanities/art-americas/us-art-19c/romanticism-us", "kind": "Topic", "slug": "romanticism-us"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/us-art-19c/realism-us/", "id": "realism-us", "hide": false, "title": "Realism in the United States", "child_data": [{"kind": "Article", "id": "x940759fb"}, {"kind": "Article", "id": "xb1feff3e"}, {"kind": "Article", "id": "x26609998"}, {"kind": "Video", "id": "708153520"}, {"kind": "Video", "id": "719781806"}, {"kind": "Video", "id": "x71036834"}, {"kind": "Article", "id": "x34135bf6"}], "children": [{"path": "khan/humanities/art-americas/us-art-19c/realism-us/winslow-homer-the-life-line-1884/", "id": "WV3MXLAfIi4", "title": "Homer, The Life Line", "kind": "Video", "description": "Winslow Homer, The Life Line, 1884, oil on canvas, 28-5/8 x 44-3/4 inches / 72.7 x 113.7 cm (Philadelphia Museum of Art). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "winslow-homer-the-life-line-1884"}, {"path": "khan/humanities/art-americas/us-art-19c/realism-us/winslow-homer-the-fog-warning-halibut-fishing-1885/", "id": "z9s_uJlG3b8", "title": "Homer, The Fog Warning (Halibut Fishing)", "kind": "Video", "description": "Winslow Homer, The Fog Warning (Halibut Fishing), 1885, oil on canvas, 30-1/4 x 48-1/2 inches / 76.83 x 123.19 cm (Museum of Fine Arts, Boston)", "slug": "winslow-homer-the-fog-warning-halibut-fishing-1885"}, {"path": "khan/humanities/art-americas/us-art-19c/realism-us/sea-change/", "id": "xGTTT6nG3Ns", "title": "Homer, Northeaster", "kind": "Video", "description": "Met curator H. Barbara Weinberg on the power of nature in Winslow Homer\u2019s Northeaster,\u00a01895; reworked by 1901.\n\nView this work on the metmuseum.org.\u00a0\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit\u00a0Find an Educator Resource.", "slug": "sea-change"}], "in_knowledge_map": false, "description": "", "node_slug": "realism-us", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/us-art-19c/realism-us", "extended_slug": "humanities/art-americas/us-art-19c/realism-us", "kind": "Topic", "slug": "realism-us"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/us-art-19c/civil-war-gilded-age/", "id": "civil-war-gilded-age", "hide": false, "title": "American Aestheticism and the Gilded Age", "child_data": [{"kind": "Article", "id": "xd330f947"}, {"kind": "Article", "id": "xfc829ebe"}, {"kind": "Video", "id": "719842165"}, {"kind": "Article", "id": "xc66df200"}, {"kind": "Article", "id": "x7a71ed13"}, {"kind": "Article", "id": "x09436346"}], "children": [{"path": "khan/humanities/art-americas/us-art-19c/civil-war-gilded-age/john-singer-sargent-carnation-lily-lily-rose-1885-86/", "id": "-bnCHws9qmw", "title": "Sargent, Carnation, Lily, Lily, Rose", "kind": "Video", "description": "John Singer Sargent, Carnation, Lily, Lily, Rose, 1885-86, oil on canvas, 1740 x 1537 mm (Tate Britain, London)", "slug": "john-singer-sargent-carnation-lily-lily-rose-1885-86"}], "in_knowledge_map": false, "description": "Find here the art of Winslow Homer, the expat Mary Cassatt, and work by other American artists in the 2nd half of the 19th century.", "node_slug": "civil-war-gilded-age", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/us-art-19c/civil-war-gilded-age", "extended_slug": "humanities/art-americas/us-art-19c/civil-war-gilded-age", "kind": "Topic", "slug": "civil-war-gilded-age"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/us-art-19c/us-19c-arch-sculp-photo/", "id": "us-19c-arch-sculp-photo", "hide": false, "title": "19th century American sculpture, architecture and photography", "child_data": [{"kind": "Article", "id": "x0f2b6897"}, {"kind": "Article", "id": "xc91bab9c"}, {"kind": "Article", "id": "x7aa97a6b"}, {"kind": "Article", "id": "x8d3f4d04"}, {"kind": "Video", "id": "x4921753a"}, {"kind": "Article", "id": "x960bf037"}, {"kind": "Article", "id": "x09923c51"}], "children": [{"path": "khan/humanities/art-americas/us-art-19c/us-19c-arch-sculp-photo/hopkins-chair/", "id": "cgZHD9We0mY", "title": "Mark Hopkins House Side Chair (Herter Brothers)", "kind": "Video", "description": "Mark Hopkins House Side Chair, c. 1878-80, designed and made by Herter Brothers (New York), rosewood, inlaid and veneered with various woods, silk (of the period, but not original) (Cooper Hewitt, Smithsonian Design Museum, Museum purchase from General Acquisitions Endowment Fund, 2010-5-1) A conversation with Emily Orr (Assistant Curator of Modern and Contemporary American Design, Cooper Hewitt, Smithsonian Design Museum) and Dr. Beth Harris (Smarthistory)", "slug": "hopkins-chair"}], "in_knowledge_map": false, "description": "", "node_slug": "us-19c-arch-sculp-photo", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/us-art-19c/us-19c-arch-sculp-photo", "extended_slug": "humanities/art-americas/us-art-19c/us-19c-arch-sculp-photo", "kind": "Topic", "slug": "us-19c-arch-sculp-photo"}], "in_knowledge_map": false, "description": "", "node_slug": "us-art-19c", "render_type": "Topic", "topic_page_url": "/humanities/art-americas/us-art-19c", "extended_slug": "humanities/art-americas/us-art-19c", "kind": "Topic", "slug": "us-art-19c"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-americas/painting-mexico/", "id": "painting-mexico", "hide": false, "title": "Art of Mexico in the 19th century", "child_data": [{"kind": "Video", "id": "x287fb460"}, {"kind": "Article", "id": "x3678f46f"}], "children": [{"path": "khan/humanities/art-americas/painting-mexico/jos-mara-velasco-the-valley-of-mexico-from-the-santa-isabel-mountain-range-1875/", "id": "abc1Y4X-id8", "title": "Velasco, The Valley of Mexico", "kind": "Video", "description": "Jos\u00e9 Mar\u00eda Velasco, The Valley of Mexico from the Santa Isabel Mountain Range (Valle de M\u00e9xico desde el cerro de Santa Isabel),1875, oil on canvas, 137.5 x 226 cm (Museo Nacional de Arte, INBA, Mexico City)\n\nSpeakers: Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker", "slug": "jos-mara-velasco-the-valley-of-mexico-from-the-santa-isabel-mountain-range-1875"}], "in_knowledge_map": false, "description": "The landscapes of Jos\u00e9 Mar\u00eda Velasco and the first art school in the Americas, the Real Academia de San Carlos", "node_slug": "painting-mexico", "render_type": "Tutorial", "topic_page_url": "/humanities/art-americas/painting-mexico", "extended_slug": "humanities/art-americas/painting-mexico", "kind": "Topic", "slug": "painting-mexico"}], "in_knowledge_map": false, "description": "", "node_slug": "art-americas", "render_type": "Subject", "topic_page_url": "/humanities/art-americas", "extended_slug": "humanities/art-americas", "kind": "Topic", "slug": "art-americas"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/becoming-modern/", "id": "becoming-modern", "hide": false, "title": "Art in 19th century Europe", "child_data": [{"kind": "Topic", "id": "x2b736673"}, {"kind": "Topic", "id": "x1c87ca3f"}, {"kind": "Topic", "id": "xd7a97249"}, {"kind": "Topic", "id": "xbbfcbdef"}, {"kind": "Topic", "id": "x9d6d984e"}, {"kind": "Topic", "id": "xa5f779e9"}, {"kind": "Topic", "id": "x027bf931"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/becoming-modern/intro-becoming-modern/", "id": "intro-becoming-modern", "hide": false, "title": "Introduction\u2014Becoming Modern", "child_data": [{"kind": "Article", "id": "x15ce2717"}, {"kind": "Video", "id": "x082f493e"}, {"kind": "Article", "id": "xcf1b62b7"}], "children": [{"path": "khan/humanities/becoming-modern/intro-becoming-modern/where-are-the-women/", "id": "AbUkraQIYv8", "title": "Unlock Art: Where are the Women?", "kind": "Video", "description": "This video brought to you by Tate.org.uk\n\nBy calling attention to identity, sexuality, politics, and history, women artists have dominated the art debates for the last several decades. Despite this, only a small percentage of gallery collections and displays belong to women artists, even today. So how do we go about talking about women in art history? Learn more about the changing role of female artists in a male dominated art world over the centuries. Join Jemima Kirke as she guides us through a history of women in art, exploring the ways in which they have been represented, underrepresented, and sometimes misrepresented.\nShould there exist a separate Women\u2019s Art History to tell this story, or is it simply a matter of inserting women into existing narratives? What about removing the label altogether, and referring to women artists as just artists? Would this ignore an important component of identity or recognise that women and men can be artists in equal measure?\u00a0How can women artists be sufficiently recognised without distancing them from art history as we know it?", "slug": "where-are-the-women"}], "in_knowledge_map": false, "description": "", "node_slug": "intro-becoming-modern", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/intro-becoming-modern", "extended_slug": "humanities/becoming-modern/intro-becoming-modern", "kind": "Topic", "slug": "intro-becoming-modern"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/becoming-modern/romanticism/", "id": "romanticism", "hide": false, "title": "Romanticism", "child_data": [{"kind": "Topic", "id": "x1a886c0f"}, {"kind": "Topic", "id": "xd8fe62cd"}, {"kind": "Topic", "id": "xdfe479bc"}, {"kind": "Topic", "id": "x8220c628"}, {"kind": "Topic", "id": "x2b937ee7"}, {"kind": "Topic", "id": "xfe4c2595"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/", "id": "romanticism-in-france", "hide": false, "title": "France", "child_data": [{"kind": "Article", "id": "x89cc8015"}, {"kind": "Video", "id": "671385801"}, {"kind": "Exercise", "id": "xb73ad205"}, {"kind": "Article", "id": "xc49ea050"}, {"kind": "Article", "id": "x8ea3a4e9"}, {"kind": "Video", "id": "671656221"}, {"kind": "Article", "id": "xd0fcd5b6"}, {"kind": "Article", "id": "xc1acaff6"}, {"kind": "Exercise", "id": "xde42b76a"}, {"kind": "Video", "id": "671656224"}, {"kind": "Video", "id": "671593301"}, {"kind": "Video", "id": "671656223"}, {"kind": "Exercise", "id": "x0127ec70"}, {"kind": "Article", "id": "x851a24eb"}, {"kind": "Video", "id": "671422835"}, {"kind": "Video", "id": "671260999"}, {"kind": "Video", "id": "671539974"}, {"kind": "Article", "id": "x507c4478"}, {"kind": "Exercise", "id": "x6786fe7f"}, {"kind": "Article", "id": "x6a3c2bee"}, {"kind": "Exercise", "id": "x2c996bfb"}], "children": [{"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/gros-napoleon-bonaparte-visiting-the-pest-house-in-jaffa-1804/", "id": "Rx1HtFtc1cM", "title": "Gros, Napoleon Bonaparte Visiting the Plague-Stricken in Jaffa", "kind": "Video", "description": "Baron Antoine-Jean Gros, Napoleon Bonaparte Visiting the Pest House in Jaffa, 1804, oil on canvas, 209 x 280 inches (Mus\u00e9e du Louvre, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nNote: Gros was a student of the Neo-Classical painter David, however, this painting, sometimes also titled, \u00a0Napoleon Visiting the Pest House in Jaffa, is a proto-Romantic painting that points to the later style of Gericault and Delacroix.\u00a0Gros was trained in David's studio between 1785-1792, and is most well known for recording Napoleon's military campaigns, which proved to be ideal subjects for exploring the exotic, violent, and heroic. In this painting, which measures more than 17 feet high and 23 feet wide, Gros depicted a legendary episode from Napoleon's campaigns in Egypt (1798-1801). On March 21, 1799, \u00a0in a make-shift hospital in Jaffa, Napoleon visited his troops who were stricken with the Bubonic Plague. Gros depicts Napoleon attempting to calm the growing panic about contagion by fearlessly \u00a0touching the sores of one of the plague victims. Like earlier neoclassical paintings such as David's Death of Marat, Gros combines Christian iconography, in this case Christ healing the sick, with a contemporary subject. He also draws on the art of classical antiquity, by depicting Napoleon in the same position as the ancient Greek sculpture, the Apollo Belvedere. In this way, he imbues Napoleon with divine qualities while simultaneously showing him as a military hero. But in contrast to David, Gros uses warm, sensual colors and focuses on the dead and dying who occupy the foreground of the painting. We see the same approach later in Delacroix's painting ofLiberty Leading the People (1830). Napoleon was a master at using art to manipulate his public image. In reality he had ordered the death of the prisoners who he could not afford to house or feed, and poisoned his troops who were dying from the plague as he retreated from Jaffa.", "slug": "gros-napoleon-bonaparte-visiting-the-pest-house-in-jaffa-1804"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/ingres-la-grande-odalisque-1814/", "id": "lSV-J1JHDFY", "title": "Ingres, La Grande Odalisque", "kind": "Video", "description": "Jean-Auguste-Dominique Ingres, La Grande Odalisque, 1814, Oil on canvas, 36\" x 63\" (91 x 162 cm), (Mus\u00e9e du Louvre, Paris)", "slug": "ingres-la-grande-odalisque-1814"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/ingres-la-grande-odalisque-quiz/", "id": "ingres--la-grande-odalisque-quiz", "title": "Ingres, La Grande Odalisque (quiz)", "description": "Test your knowledge.", "slug": "ingres-la-grande-odalisque-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/ingres-princess-de-broglie-1851-53/", "id": "sQpAYcxSVEg", "title": "Ingres, Princesse de Broglie", "kind": "Video", "description": "Jean-Auguste-Dominique Ingres,\u00a0Princesse de Broglie, oil on canvas,\u00a01851\u201353\u00a0(The Metropolitan Museum of Art).\u00a0Speakers:\u00a0Dr. Beth Harris,\u00a0Dr. Steven Zucker", "slug": "ingres-princess-de-broglie-1851-53"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/ingres-raphael-and-the-fornarina-1814/", "id": "CXsstWSXh68", "title": "Ingres, Raphael and the Fornarina", "kind": "Video", "description": "Jean-Auguste-Dominique Ingres, Raphael and the Fornarina, 1814, Oil on canvas, 64.77 x 53.34 cm (25 1/2 x 21 in.) (Fogg Art Museum) http://www.smarthistory.org/raphael-and-the-fornarina.html", "slug": "ingres-raphael-and-the-fornarina-1814"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/g-ricault-raft-of-the-medusa-1818-19/", "id": "XympPG5iD-Y", "title": "G\u00e9ricault, Raft of the Medusa", "kind": "Video", "description": "Th\u00e9odore G\u00e9ricault, Raft of the Medusa, oil on canvas, 193 x 282 inches, 1818-19 (Mus\u00e9e du Louvre, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "g-ricault-raft-of-the-medusa-1818-19"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/gericault-raft-of-the-medusa-quiz/", "id": "gericault--raft-of-the-medusa-quiz", "title": "Gericault, Raft of the Medusa (quiz)", "description": "Test your knowledge.", "slug": "gericault-raft-of-the-medusa-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/delacroix-scene-of-the-massacre-at-chios-greek-families-awaiting-death-or-slavery-1824/", "id": "CyNjK7dv-IM", "title": "Delacroix, Scene of the massacre at Chios", "kind": "Video", "description": "Eug\u00e8ne Delacroix, Scene of the massacre at Chios; Greek families awaiting death or slavery, 1824 Salon, oil on canvas, 164\" \u00d7 139\" (419 cm \u00d7 354 cm) (Mus\u00e9e du Louvre, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker http://www.smarthistory.org/delacroix-scene-massacre-chios.html", "slug": "delacroix-scene-of-the-massacre-at-chios-greek-families-awaiting-death-or-slavery-1824"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/delacroix-the-death-of-sardanapalus-1827/", "id": "iDBJK0y8vb0", "title": "Delacroix, The Death of Sardanapalus", "kind": "Video", "description": "Eug\u00e8ne Delacroix, The Death of Sardanapalus, 1827, oil on canvas, 12 ft 10 in x 16 ft 3 in. (3.92 x 4.96m) (Mus\u00e9e du Louvre, Paris) Speakers: Drs. Beth Harris and Steven Zucker", "slug": "delacroix-the-death-of-sardanapalus-1827"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/delacroix-liberty-leading-the-people-1830/", "id": "BP5mCFyBCq8", "title": "Delacroix, Liberty Leading the People", "kind": "Video", "description": "Eug\u00e8ne Delacroix, Liberty Leading the People, oil on canvas, 2.6 x 3.25m, 1830 (Mus\u00e9e du Louvre, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "delacroix-liberty-leading-the-people-1830"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/delacroix-s-liberty-leading-the-people-quiz/", "id": "delacroix-s-liberty-leading-the-people-quiz", "title": "Delacroix, Liberty Leading the People (quiz)", "description": "Test your knowledge.", "slug": "delacroix-s-liberty-leading-the-people-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-france/romanticism-in-france/", "id": "romanticism-in-france", "title": "Romanticism in France (quiz)", "description": "Test your knowledge.", "slug": "romanticism-in-france", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Romanticism begins in France with the violent and exotic battle scenes of Gros and the famous shipwreck, the Raft of the Medusa, painted by Gericault. Soon after, two distinct trends emerge in French painting, one\u2014represented by the artist Delacroix\u2014was rebellious, and emphasized emotion, color and loose brushwork. The other\u2014which can be seen in the art of Ingres\u2014upheld tradition, and emphasized line and a highly finished surface. Of course, things were more complicated\u2014but those were battle lines!", "node_slug": "romanticism-in-france", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/romanticism/romanticism-in-france", "extended_slug": "humanities/becoming-modern/romanticism/romanticism-in-france", "kind": "Topic", "slug": "romanticism-in-france"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-spain/", "id": "romanticism-in-spain", "hide": false, "title": "Spain", "child_data": [{"kind": "Article", "id": "x5d4d090a"}, {"kind": "Exercise", "id": "xa77ccdde"}, {"kind": "Video", "id": "671656220"}, {"kind": "Article", "id": "x675d8f3f"}, {"kind": "Video", "id": "x33974b7c"}, {"kind": "Article", "id": "x31d83c53"}, {"kind": "Exercise", "id": "xf6c49ffc"}, {"kind": "Video", "id": "671718096"}], "children": [{"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-spain/goya-the-sleep-of-reason-produces-monsters-quiz/", "id": "goya--the-sleep-of-reason-produces-monsters-quiz", "title": "Goya, The Sleep of Reason Produces Monsters (quiz)", "description": "Test your knowledge.", "slug": "goya-the-sleep-of-reason-produces-monsters-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-spain/goya-the-family-of-charles-iv-c-1800/", "id": "TlvXGblFsv8", "title": "Goya, The Family of Charles IV", "kind": "Video", "description": "Francisco Goya, The Family of Charles IV, c. 1800, Prado Museum, 280 cm x 336 cm (Museo Nacional del Prado, Madrid) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "goya-the-family-of-charles-iv-c-1800"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-spain/goya-third-may/", "id": "_QM-DfhrNv8", "title": "Art historical analysis (painting), a basic introduction using Goya's Third of May, 1808", "kind": "Video", "description": "Francisco de Goya, Third of May, 1808, 1814, oil on canvas, 266 x 345.1 cm (Museo del Prado. Madrid)", "slug": "goya-third-may"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-spain/goya-the-third-of-may-quiz/", "id": "goya--the-third-of-may-quiz", "title": "Goya, The Third of May (quiz)", "description": "Test your knowledge.", "slug": "goya-the-third-of-may-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-spain/goya-saturn-devouring-one-of-his-sons/", "id": "3Lawz8TcPig", "title": "Goya, Saturn Devouring His Son", "kind": "Video", "description": "Francisco de Goya y Lucientes, Saturn Devouring One Of His Sons, 1821-1823, 143.5 x 81.4 cm (Prado, Madrid) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\n\u00a0\n\nOne of the\"Black Paintings\" that Goya painted on the walls of his house outside Madrid. This image was originally located on the lower floor of the house known as \"la Quinta del Sordo.\" Goya painted on the walls using several materials including oil paint. The \"Black Paintings\" had suffered significant damage and loss in their original location and when they were removed from the walls and transferred to canvas by Baron \u00c9mile d'Erlanger shortly after he aquired the house in 1873. Please note that Saturn is also known as Cronus or Kronus.", "slug": "goya-saturn-devouring-one-of-his-sons"}], "in_knowledge_map": false, "description": "The great artist Francisco Goya is the focus of this tutorial. Goya began his career designing tapestries for the royal residences, and eventually became court painter to the King of Spain. But after Napoleon\u2019s army occupied Spain and deposed the King, Goya documented the horrors he witnessed. His work following the occupation, including the Third of May 1808, remains some of the most powerful anti-war images ever created. His later years were spent largely in a house outside Madrid which he painted with haunting scenes. Saturn Devouring his sons belongs to this late series, known as the \u201cBlack Paintings.\u201d", "node_slug": "romanticism-in-spain", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/romanticism/romanticism-in-spain", "extended_slug": "humanities/becoming-modern/romanticism/romanticism-in-spain", "kind": "Topic", "slug": "romanticism-in-spain"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-england/", "id": "romanticism-in-england", "hide": false, "title": "England (Blake and Fuseli)", "child_data": [{"kind": "Article", "id": "x485a3eb0"}, {"kind": "Article", "id": "xde55086f"}, {"kind": "Exercise", "id": "x4efbc2c6"}, {"kind": "Video", "id": "719832194"}, {"kind": "Video", "id": "x585e08ad"}, {"kind": "Article", "id": "x6142b160"}, {"kind": "Video", "id": "xe0038df8"}], "children": [{"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-england/fuselli-the-nighmare-quiz/", "id": "fuselli--the-nighmare-quiz", "title": "Fuseli, The Nighmare (quiz)", "description": "Test your knowledge.", "slug": "fuselli-the-nighmare-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-england/henry-fuseli-titania-and-bottom-c-1790/", "id": "DMxaK0xjIdE", "title": "Fuseli, Titania and Bottom", "kind": "Video", "description": "Henry Fuseli, Titania and Bottom, c. 1790, oil on canvas, 2172 x 2756 mm (Tate Britain, London)", "slug": "henry-fuseli-titania-and-bottom-c-1790"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-england/be-prepared/", "id": "8pSBIydZULc", "title": "Blake, The Parable of the Wise and Foolish Virgins", "kind": "Video", "description": "Met curator Constance McPhee on outsiders in William Blake\u2019s The Parable of the Wise and Foolish Virgins, c. 1799\u20131800.\n\nBlake painted four versions of this subject for his patron Thomas Butts and this lucid watercolor is the earliest. The wise virgins at left are elegant, palely luminous, and composed within a single plane, recalling classical low-relief sculpture. In contrast, their foolish companions at right are agitated and characterized by dark tones. The drawing illustrates\u00a0a parable in Matthew 25:1-13 used by Jesus to warn listeners to be spiritually prepared:\u00a0\n\nThen shall the kingdom of heaven be likened unto ten virgins, which took their lamps, and went forth to meet the bridegroom. And five of them were wise, and five were foolish. They that were foolish took their lamps, and took no oil with them. But the wise took oil in their vessels with their lamps.\u00a0A trumpeting angel flying overhead signifies that the moment of judgment has arrived.\n\nView this work on the metmuseum.org.\u00a0\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit Find an Educator Resource.", "slug": "be-prepared"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-england/room-blake/", "id": "31_7PcU9YFc", "title": "Room: William Blake", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Martin Myrone explores the work of William Blake. To learn more about Blake's life and work, check out our resource here.\n\nLearn more about the art featured in this video:\n- William Blake, Newton, 1795\n-\u00a0William Blake, The Ghost of a Flea, 1819-20\n-\u00a0William Blake, The Spiritual Form of Pitt Guiding Behemoth, 1805\n- William Blake, The Spiritual Form of Nelson Guiding Leviathan, 1805", "slug": "room-blake"}], "in_knowledge_map": false, "description": "As the industrial revolution transformed the British countryside, replacing fields with factories, painters turned to landscape. Constable painted his native suffolk, where he spent his childhood, and imbued it with a sense of affection for rural life. Turner, on the other hand, created dramatic and sublime landscapes with a sense of the heroic or even the tragic. What both of these artists have in common is a desire to make landscape painting\u2014understood as a low subject by the Academy which dictated official views on art\u2014carry serious meaning.", "node_slug": "romanticism-in-england", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/romanticism/romanticism-in-england", "extended_slug": "humanities/becoming-modern/romanticism/romanticism-in-england", "kind": "Topic", "slug": "romanticism-in-england"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/", "id": "england-constable-turner", "hide": false, "title": "England (Constable, Turner, Martin and Nash)", "child_data": [{"kind": "Article", "id": "x8459cc19"}, {"kind": "Video", "id": "xd545c5c8"}, {"kind": "Exercise", "id": "xf307fe6e"}, {"kind": "Article", "id": "x1d610f61"}, {"kind": "Article", "id": "x9fd0c3cf"}, {"kind": "Article", "id": "xf861bd30"}, {"kind": "Article", "id": "x9bd6ef96"}, {"kind": "Video", "id": "1239028451"}, {"kind": "Exercise", "id": "x0af2ae1d"}, {"kind": "Video", "id": "671563224"}, {"kind": "Article", "id": "x53f2241b"}, {"kind": "Article", "id": "x9f4a4b8a"}, {"kind": "Article", "id": "x28691d12"}, {"kind": "Article", "id": "x614837e3"}, {"kind": "Video", "id": "x7c21288c"}, {"kind": "Article", "id": "xed208e49"}, {"kind": "Article", "id": "x77377144"}, {"kind": "Exercise", "id": "x3b82f2c4"}], "children": [{"path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/john-constable-view-on-the-stour-near-dedham/", "id": "MxyQgpgc7Ds", "title": "Constable, View on the Stour near Dedham", "kind": "Video", "description": "John Constable, View on the Stour near Dedham, 1822, oil on canvas, 51 x 74 inches (The Huntington Library, Art Collections, and Botanical Gardens, San Marino, CA) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "john-constable-view-on-the-stour-near-dedham"}, {"path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/constable-view-on-the-stour-near-dedham/", "id": "constable--view-on-the-stour-near-dedham", "title": "Constable, View on the Stour near Dedham (quiz)", "description": "Test your knowledge.", "slug": "constable-view-on-the-stour-near-dedham", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/turner-slave-ship-slavers-throwing-overboard-the-dead-and-dying-typhoon-coming-on-1840/", "id": "NoCW80MEGXY", "title": "Turner, Slave Ship", "kind": "Video", "description": "Joseph Mallord William Turner, Slave Ship (Slavers Throwing Overboard the Dead and Dying, Typhoon Coming On), 1840 (Museum of Fine Arts, Boston) Speakers: Lori Landay & Beth Harris", "slug": "turner-slave-ship-slavers-throwing-overboard-the-dead-and-dying-typhoon-coming-on-1840"}, {"path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/turner-s-slave-ship-quiz/", "id": "turner-s-slave-ship-quiz", "title": "Turner's Slave Ship (quiz)", "description": "Test your knowledge.", "slug": "turner-s-slave-ship-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/turner-rain-steam-and-speed-the-great-western-railway-1844/", "id": "pPsqUFuysbU", "title": "Turner, Rain, steam, and speed \u2013 the great western railway", "kind": "Video", "description": "Joseph Mallord William Turner, Rain, Steam, and Speed -- The Great Western Railway, oil on canvas, 1844 (National Gallery, London) Speakers: Dr. Beth Harris, Dr. Steven Zucker\n\nRain, Steam, and Speed -- The Great Western Railway was exhibited at the Royal Academy in 1844. It depicts the Maidenhead Railway Bridge (completed (1838) looking east, across the River Thames\u200b between Taplow and Maidenhead.", "slug": "turner-rain-steam-and-speed-the-great-western-railway-1844"}, {"path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/room-turner/", "id": "0C2Ucb69eOM", "title": "Room: JMW Turner", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator David Brown explores the work of JMW Turner. Check out\u00a0Turner Online for an in-depth look at the artist's life and work.\n\nLearn more about the art featured in this video:\n- JMW Turner, The Shipwreck, exhibited 1805\n- JMW Turner,\u00a0Ancient Rome; Agrippina Landing with the Ashes of Germanicus, exhibited 1839", "slug": "room-turner"}, {"path": "khan/humanities/becoming-modern/romanticism/england-constable-turner/romanticism-in-england/", "id": "romanticism-in-england", "title": "Romanticism in England (quiz)", "description": "Test your knowledge!", "slug": "romanticism-in-england", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "england-constable-turner", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/romanticism/england-constable-turner", "extended_slug": "humanities/becoming-modern/romanticism/england-constable-turner", "kind": "Topic", "slug": "england-constable-turner"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/", "id": "romanticism-in-germany", "hide": false, "title": "Germany", "child_data": [{"kind": "Video", "id": "708138868"}, {"kind": "Article", "id": "x9afeb807"}, {"kind": "Exercise", "id": "x7c98d55a"}, {"kind": "Video", "id": "719746436"}, {"kind": "Exercise", "id": "x9df2f470"}, {"kind": "Video", "id": "708126672"}, {"kind": "Video", "id": "719804657"}, {"kind": "Exercise", "id": "x73854239"}], "children": [{"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/caspar-david-friedrich-monk-by-the-sea-1808-or-1810/", "id": "XkcHktjqI1s", "title": "Friedrich, Monk by the Sea", "kind": "Video", "description": "Caspar David Friedrich, Monk by the Sea, 1808 or 1810, oil on canvas, 110 x 171.5 cm (Alte Nationalgalerie, Staatliche Museen zu Berlin)", "slug": "caspar-david-friedrich-monk-by-the-sea-1808-or-1810"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/friedrich-monk-by-the-sea/", "id": "friedrich--monk-by-the-sea", "title": "Friedrich, Monk By the Sea (quiz)", "description": "Test your knowledge.", "slug": "friedrich-monk-by-the-sea", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/caspar-david-friedrich-abbey-among-oak-trees-1809-or-1810/", "id": "_DgeQ7rpIHI", "title": "Friedrich, Abbey among Oak Trees", "kind": "Video", "description": "Caspar David Friedrich, Abbey among Oak Trees, 1809 or 1810, oil on canvas, 110.4 x 171 cm (Alte Nationalgalerie, Berlin)", "slug": "caspar-david-friedrich-abbey-among-oak-trees-1809-or-1810"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/friedrich-abbey-among-the-oak-trees-quiz/", "id": "friedrich--abbey-among-the-oak-trees-quiz", "title": "Friedrich, Abbey among Oak Trees (quiz)", "description": "Test your knowledge.", "slug": "friedrich-abbey-among-the-oak-trees-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/caspar-david-friedrich-solitary-tree-or-lone-tree-1822/", "id": "YlhDUSntCI4", "title": "Friedrich, The Lone Tree", "kind": "Video", "description": "Caspar David Friedrich, Solitary Tree (or Lone Tree), 1822, oil on canvas, 55 x 71 cm (Alte Nationalgalerie, Berlin)", "slug": "caspar-david-friedrich-solitary-tree-or-lone-tree-1822"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/caspar-david-friedrich-woman-at-a-window-1822/", "id": "eE7BR9HCffk", "title": "Friedrich, Woman at a Window", "kind": "Video", "description": "Caspar David Friedrich, Woman at a Window, 1822, oil on canvas, 44 x 73 cm (Alte Nationalgalerie, Berlin). In the Google Art Project: http://www.googleartproject.com/collection/alte-nationalgalerie/artwork/woman-at-a-window-caspar-david-friedrich/328396/", "slug": "caspar-david-friedrich-woman-at-a-window-1822"}, {"path": "khan/humanities/becoming-modern/romanticism/romanticism-in-germany/german-romanticism/", "id": "german-romanticism", "title": "German Romanticism", "description": "Test your knowledge.", "slug": "german-romanticism", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial focuses exclusively on the art of Caspar David Friedrich, whose work best exemplifies Romanticism\u2019s interest in the big questions of man\u2019s mortality and place in the universe. The world had changed dramatically since the time of Michelangelo, Bernini and Rembrandt, and as a result, Friedrich approached these big questions without the Christian narratives that dominated the art of the past. And like his English counterparts during this period, he imbues nature and the landscape with symbolic and often spiritual meaning.", "node_slug": "romanticism-in-germany", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/romanticism/romanticism-in-germany", "extended_slug": "humanities/becoming-modern/romanticism/romanticism-in-germany", "kind": "Topic", "slug": "romanticism-in-germany"}], "in_knowledge_map": false, "description": "Artists such as Delacroix, Goya, Turner, and Friedrich responded to a newly modern world by creating some of the most emotionally expressive art ever made.", "node_slug": "romanticism", "render_type": "Topic", "topic_page_url": "/humanities/becoming-modern/romanticism", "extended_slug": "humanities/becoming-modern/romanticism", "kind": "Topic", "slug": "romanticism"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/becoming-modern/early-photography/", "id": "early-photography", "hide": false, "title": "Early photography", "child_data": [{"kind": "Article", "id": "x980bccee"}, {"kind": "Article", "id": "x1c9b4da6"}, {"kind": "Video", "id": "x0e92121e"}, {"kind": "Video", "id": "x06898c45"}, {"kind": "Article", "id": "x6a11c54a"}, {"kind": "Article", "id": "x45c74613"}, {"kind": "Video", "id": "x3ace4c00"}], "children": [{"path": "khan/humanities/becoming-modern/early-photography/early-photography-daguerreotypes/", "id": "N0Ambe4FwQk", "title": "Early photography: making daguerreotypes", "kind": "Video", "description": "The daguerreotype is a one-of-a-kind, highly detailed photographic image on a polished copper plate coated with silver. It was introduced in 1839 and became the first popular photographic medium. Love art? Follow us on Google+", "slug": "early-photography-daguerreotypes"}, {"path": "khan/humanities/becoming-modern/early-photography/wet-collodion-process/", "id": "MiAhPIUno1o", "title": "The wet collodion process", "kind": "Video", "description": "The wet collodion photographic process produced a glass negative and a beautifully detailed print that was preferred over earlier techniques. This method thrived from the 1850s until about 1880. Love art? Follow us on Google+", "slug": "wet-collodion-process"}, {"path": "khan/humanities/becoming-modern/early-photography/emerson-naturalistic-photography/", "id": "z_guKLKwjgY", "title": "P.H. Emerson's naturalistic photography", "kind": "Video", "description": "P.H. Emerson (1856-1936) believed that \"nothing in nature has a hard outline\" and attempted to emulate natural eyesight wherein the subject is sharp and everything else gradually falls out of focus. Love art? Follow us on Google+", "slug": "emerson-naturalistic-photography"}], "in_knowledge_map": false, "description": "The early photography of Ni\u00e9pce, Daguerre, Cameron posed questions about art, aesthetics, and technology we still try to answer today.", "node_slug": "early-photography", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/early-photography", "extended_slug": "humanities/becoming-modern/early-photography", "kind": "Topic", "slug": "early-photography"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/becoming-modern/victorian-art-architecture/", "id": "Victorian-art-architecture", "hide": false, "title": "Victorian art and architecture", "child_data": [{"kind": "Topic", "id": "x4c2c7c05"}, {"kind": "Topic", "id": "xe6a81777"}, {"kind": "Topic", "id": "x1bbb9ad1"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/victorian-art-architecture/early-victorian/", "id": "early-victorian", "hide": false, "title": "Early Victorian", "child_data": [{"kind": "Article", "id": "xafbbe09e"}, {"kind": "Video", "id": "xe988b1a9"}, {"kind": "Exercise", "id": "x3b5ab74e"}, {"kind": "Article", "id": "x4429a8f7"}], "children": [{"path": "khan/humanities/becoming-modern/victorian-art-architecture/early-victorian/palace-westminster/", "id": "7oBUIo5R5qg", "title": "Charles Barry and A.W.N. Pugin, Palace of Westminster (Houses of Parliament)", "kind": "Video", "description": "Charles Barry and A.W.N. Pugin, Palace of Westminster (Houses of Parliament), 1840-70, London\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "palace-westminster"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/early-victorian/houses-of-parliament-quiz/", "id": "houses-of-parliament-quiz", "title": "Houses of Parliament Quiz", "description": "This quiz is for the video Charles Barry and A.W.N. Pugin, Palace of Westminster.", "slug": "houses-of-parliament-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Modernity in the guise of history", "node_slug": "early-victorian", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/Victorian-art-architecture/early-victorian", "extended_slug": "humanities/becoming-modern/Victorian-art-architecture/early-victorian", "kind": "Topic", "slug": "early-victorian"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/", "id": "pre-raphaelites", "hide": false, "title": "The Pre-Raphaelites and mid-Victorian art", "child_data": [{"kind": "Article", "id": "x8792c7bf"}, {"kind": "Video", "id": "x9430b2c4"}, {"kind": "Video", "id": "719842166"}, {"kind": "Article", "id": "x8162c935"}, {"kind": "Video", "id": "719624694"}, {"kind": "Article", "id": "x5fa319bf"}, {"kind": "Exercise", "id": "x044ea75f"}, {"kind": "Video", "id": "719474986"}, {"kind": "Article", "id": "xd23e51ba"}, {"kind": "Article", "id": "x14ee4e7c"}, {"kind": "Video", "id": "669368681"}, {"kind": "Article", "id": "xab09ccc3"}, {"kind": "Video", "id": "671385806"}, {"kind": "Article", "id": "xe3f5bc87"}, {"kind": "Video", "id": "719746437"}, {"kind": "Article", "id": "x19a68f31"}, {"kind": "Exercise", "id": "x4c97ffad"}, {"kind": "Video", "id": "708157438"}, {"kind": "Article", "id": "x08f30bf1"}, {"kind": "Article", "id": "xc0667254"}, {"kind": "Video", "id": "x44b44df2"}, {"kind": "Article", "id": "x41084043"}, {"kind": "Article", "id": "x312811e9"}, {"kind": "Video", "id": "719804659"}, {"kind": "Article", "id": "xb59f22d8"}, {"kind": "Video", "id": "669368689"}, {"kind": "Article", "id": "xe10fa19a"}, {"kind": "Article", "id": "xdae89d41"}, {"kind": "Video", "id": "719832195"}, {"kind": "Article", "id": "x45dd7b8f"}, {"kind": "Video", "id": "719824439"}, {"kind": "Article", "id": "xb029adb4"}, {"kind": "Video", "id": "671593307"}, {"kind": "Article", "id": "x34eef448"}, {"kind": "Article", "id": "x37290c26"}, {"kind": "Video", "id": "719824440"}, {"kind": "Article", "id": "xf12d6036"}, {"kind": "Article", "id": "x14dc6cc9"}, {"kind": "Video", "id": "879734537"}, {"kind": "Article", "id": "x4cb3ec42"}, {"kind": "Exercise", "id": "xba36be1b"}], "children": [{"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/pre-raphaelites-curators-choice-millaiss-isabella/", "id": "-LgtilBrA4g", "title": "Pre-Raphaelites: Curator's choice - Millais's Isabella", "kind": "Video", "description": "Curator Jason Rosenfeld reveals the story behind John Everett Millais's painting Isabella and explains why this historical work is inherently modern. Millais's Isabella is one of over 150 works currently on show at Tate Britain in the exhibition Pre-Raphaelites: Victorian Avant-Garde. Pre-Raphaelites: Victorian Avant-Garde is at Tate Britain (2013)", "slug": "pre-raphaelites-curators-choice-millaiss-isabella"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/sir-john-everett-millais-christ-in-the-house-of-his-parents-1849-50/", "id": "nRPLiTZAry4", "title": "Sir John Everett Millais, Christ in the House of His Parents", "kind": "Video", "description": "Sir John Everett Millais, Christ in the House of His Parents, 1849-50, oil on canvas, 864 x 1397 mm (Tate Britain, London)", "slug": "sir-john-everett-millais-christ-in-the-house-of-his-parents-1849-50"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/sir-john-everett-millais-ophelia-1851-52/", "id": "I2M7U8eCeHA", "title": "Sir John Everett Millais, Ophelia", "kind": "Video", "description": "Sir John Everett Millais, Ophelia, 1851-52, oil on canvas, 762 x 1118 mm (Tate Britain, London)", "slug": "sir-john-everett-millais-ophelia-1851-52"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/millais-ophelia-quiz/", "id": "millais--ophelia-quiz", "title": "Millais, Ophelia Quiz", "description": "Test your knowledge on this object.", "slug": "millais-ophelia-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/sir-john-everett-millais-mariana-1851/", "id": "DjNMJpdFPGA", "title": "Millais, Mariana", "kind": "Video", "description": "Sir John Everett Millais, Mariana, 1851, oil on wood, 597 x 495 mm (Tate Britain)", "slug": "sir-john-everett-millais-mariana-1851"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/millais-the-vale-of-rest-where-the-weary-find-repose-1858/", "id": "20n0i2KQRCs", "title": "Millais, The Vale of Rest", "kind": "Video", "description": "Sir John Everett Millais, The Vale of Rest: where the weary find repose, 1858 (partially repainted 1862), oil on canvas, 40 1/2 x 68 inches (Tate Britain, London) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "millais-the-vale-of-rest-where-the-weary-find-repose-1858"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/william-holman-hunt-claudio-and-isabella-1850/", "id": "4j13InegUPk", "title": "Hunt, Claudio and Isabella", "kind": "Video", "description": "William Holman Hunt, Claudio and Isabella, 1850, oil on mahogany, 758 x 426 x 10 mm (Tate Britain) From William Shakespeare's Measure for Measure, Act III, scene 1 (a room in a prison): ISABELLA What says my brother? CLAUDIO Death is a fearful thing. ISABELLA And shamed life a hateful. CLAUDIO Ay, but to die, and go we know not where; To lie in cold obstruction and to rot; This sensible warm motion to become A kneaded clod; and the delighted spirit To bathe in fiery floods, or to reside In thrilling region of thick-ribbed ice; To be imprison'd in the viewless winds, And blown with restless violence round about The pendent world; or to be worse than worst Of those that lawless and incertain thought Imagine howling: 'tis too horrible! The weariest and most loathed worldly life That age, ache, penury and imprisonment Can lay on nature is a paradise To what we fear of death. ISABELLA Alas, alas!", "slug": "william-holman-hunt-claudio-and-isabella-1850"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/william-holman-hunt-our-english-coasts-strayed-sheep-1852/", "id": "tIqO2GS8O64", "title": "Hunt, Our English Coasts (\"Strayed Sheep\")", "kind": "Video", "description": "William Holman Hunt, Our English Coasts ('Strayed Sheep'), 1852, oil on canvas, 432 x 584 mm (Tate Britain, London)", "slug": "william-holman-hunt-our-english-coasts-strayed-sheep-1852"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/hunt-our-english-coast-quiz/", "id": "hunt--our-english-coast-quiz", "title": "Hunt, Our English Coast Quiz", "description": "Test your knowledge of this object.", "slug": "hunt-our-english-coast-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/william-holman-hunt-the-awakening-conscience-1853/", "id": "9gnM72T4DTE", "title": "Hunt, the Awakening Conscience", "kind": "Video", "description": "William Holman Hunt, The Awakening Conscience, 1853, oil on canvas, 762 x 559 mm (Tate Britain, London)", "slug": "william-holman-hunt-the-awakening-conscience-1853"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/curators-choice-browns-work/", "id": "uc2xgyjxKHg", "title": "Pre-Raphaelites: Curator's choice - Ford Madox Brown's 'Work'", "kind": "Video", "description": "One of the most radical paintings of the Pre-Raphaelite movement is Work by Ford Madox Brown, which attempts to capture the entire social fabric of Victorian London in a single scene. Curator Tim Barringer explores its multiple stories. Ford Madox Brown's Work is one of over 150 works currently on show at Tate Britain in the exhibition Pre-Raphaelites: Victorian Avant-Garde (2013).", "slug": "curators-choice-browns-work"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/henry-wallis-chatterton-1856/", "id": "HNoyVb1hr7g", "title": "Wallis, Chatterton", "kind": "Video", "description": "Henry Wallis, Chatterton, 1856, oil on canvas, 622 x 933 cm (Tate Britain, London)", "slug": "henry-wallis-chatterton-1856"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/dyce-pegwell-bay-kent-1858-60/", "id": "GlkqvEOYicA", "title": "Dyce's Pegwell Bay, Kent - a Recollection of October 5th, 1858", "kind": "Video", "description": "William Dyce, Pegwell Bay, Kent - a Recollection of October 5th 1858-60, oil on canvas,\n25 x 35 inches (Tate Britain, London)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "dyce-pegwell-bay-kent-1858-60"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/john-roddam-spencer-stanhope-thoughts-of-the-past-exhibited-1859/", "id": "zA2KSx5OYog", "title": "John Roddam Spencer Stanhope, Thoughts of the Past", "kind": "Video", "description": "John Roddam Spencer Stanhope, Thoughts of the Past, exhibited 1859, oil on canvas, 864 x 508 mm (Tate Britain, London)", "slug": "john-roddam-spencer-stanhope-thoughts-of-the-past-exhibited-1859"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/sir-edward-coley-burne-jones-the-golden-stairs-1880/", "id": "VQniy8iq9EQ", "title": "Burne-Jones, The Golden Stairs", "kind": "Video", "description": "Sir Edward Coley Burne-Jones, The Golden Stairs, 1880, oil on canvas\n2692 x 1168 mm (Tate Britain, London)", "slug": "sir-edward-coley-burne-jones-the-golden-stairs-1880"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/burne-jones-king-cophetua-and-the-beggar-maid-1884/", "id": "iPb5zeXTsSE", "title": "Burne-Jones, King Cophetua and the Beggar Maid", "kind": "Video", "description": "Edward Burne-Jones, King Cophetua and the Beggar Maid, oil on canvas, 1884\n(Tate Britain, London)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "burne-jones-king-cophetua-and-the-beggar-maid-1884"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/sir-edward-burne-jones-hope-1896/", "id": "F00vnE37pIE", "title": "Burne-Jones, Hope", "kind": "Video", "description": "Sir Edward Coley Burne-Jones, Hope, 1896, 179 x 63.5 cm, oil on canvas (Museum of Fine Arts, Boston)", "slug": "sir-edward-burne-jones-hope-1896"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/william-butterfield-all-saints-church-margaret-street/", "id": "OMEDRrGpybY", "title": "William Butterfield, All Saints, Margaret Street", "kind": "Video", "description": "All Saints Church, 7 Margaret Street, London\nArchitect: William Butterfield\n\nPrimary patrons: Alexander Beresford Hope and Henry Tritton\n\nDesigned 1849\n\nCornerstone laid by Edward Bouverie Pusey, 1850\n\nConsecrated 1859\n\nSpeakers: Dr. Ayla Lepine and Dr. Steven Zucker\n\nWilliam Butterfield had little more than 100 square feet of real estate, but designed perhaps the greatest example of High Victorian Gothic architecture. The spire soars 227 feet above London and its interior is a kaleidoscope of color and pattern that expresses the vision of the Oxford Movement and the Ecclesiological Society. In 1841, the Society announced its intentions for their model church:\n\nIt must be in a Gothic Style.\n\nIt must be built of solid materials.\n\nIts ornament should decorate its construction.\n\nIts artist should be 'a single pious and laborious artist alone, pondering deeply over his duty to do his best for the service of God's Holy Religion'.\n\nAbove all the church must be built so that the 'Rubricks and Canons of the Church of England may be Consistently observed, and the Sacraments rubrically and decently administered\u2019.", "slug": "william-butterfield-all-saints-church-margaret-street"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/pre-raphaelites/pre-raphaelites/", "id": "pre-raphaelites", "title": "Pre-Raphaelites", "description": "Test your knowledge of Pre-Raphaelite Art!", "slug": "pre-raphaelites", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In 1848, a small group of young artists banded together and formed \u201cThe Pre-Raphaelite Brotherhood,\u201d a name which sounds intentionally backward-looking and medieval. The Pre-Raphaelites looked back to art before the time of Raphael (before about 1500 that is)\u2014before the art of the Renaissance was reduced to formulas followed for centuries by artists associated with the art academies of Europe. Their idea was that the art before Raphael was more sincere, more true to nature and how we see, and therefore less formulaic. These artists also embraced a wide range of subjects, including modern life, biblical and literary subjects, and even history. By looking backwards, the Pre-Raphaelites led British art into the modern era.", "node_slug": "pre-raphaelites", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/Victorian-art-architecture/pre-raphaelites", "extended_slug": "humanities/becoming-modern/Victorian-art-architecture/pre-raphaelites", "kind": "Topic", "slug": "pre-raphaelites"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/victorian-art-architecture/victorian-late/", "id": "victorian-late", "hide": false, "title": "Late Victorian", "child_data": [{"kind": "Video", "id": "719728954"}, {"kind": "Article", "id": "xb8b7b675"}, {"kind": "Video", "id": "708175162"}, {"kind": "Article", "id": "x349f9831"}, {"kind": "Article", "id": "xe4573ecf"}, {"kind": "Video", "id": "xd13d747e"}, {"kind": "Exercise", "id": "xa85512d2"}], "children": [{"path": "khan/humanities/becoming-modern/victorian-art-architecture/victorian-late/sir-frederic-leighton-an-athlete-wrestling-with-a-python-1877/", "id": "99hAYY4usME", "title": "Leighton, an Athlete Wrestling with a Python", "kind": "Video", "description": "Sir Frederic Leighton, An Athlete Wrestling with a Python, 1877, bronze, 1746 x 984 x 1099 mm (Tate Britain, London)", "slug": "sir-frederic-leighton-an-athlete-wrestling-with-a-python-1877"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/victorian-late/sir-lawrence-alma-tadema-a-reading-from-homer-1885/", "id": "YDYxQMBm50k", "title": "Alma-Tadema, Listening to Homer", "kind": "Video", "description": "Sir Lawrence Alma-Tadema, A Reading from Homer, 1885, oil on canvas, 36-1/8 x 72-1/4 inches / 91.8 x 183.5 cm (Philadelphia Museum of Art)", "slug": "sir-lawrence-alma-tadema-a-reading-from-homer-1885"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/victorian-late/room-1890-1910/", "id": "W_YeBq1vgAs", "title": "Room: 1890-1910", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Carol Jacobi explores the period 1890-1910.\n\nLearn more about the art featured in this video:\n-\u00a0Sir William Goscombe John, A Boy at Play, 1895\n-\u00a0Sir Alfred Gilbert, Model for \u2018Eros\u2019 on the Shaftesbury Memorial, Piccadilly Circus, 1891, cast 1925\n- Sir Thomas Brock, Eve, 1900", "slug": "room-1890-1910"}, {"path": "khan/humanities/becoming-modern/victorian-art-architecture/victorian-late/late-victorian/", "id": "late-victorian", "title": "Late Victorian (quiz)", "description": "Test your knowledge!", "slug": "late-victorian", "kind": "Exercise"}], "in_knowledge_map": false, "description": "British art saw a return to the classical after the 1860s, not just in terms of style, but also subject matter. Alma Tadema created sensual Victorian visions of the ancient Greeks and Romans, and Leighton too rendered classicizing figures and subjects. Both of these artists, together with Sargent, were influenced by the Aesthetic Movement, where the subject or narrative of a work of art was minimized in favor of a focus on issues of form (color harmonies, line, composition).", "node_slug": "victorian-late", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/Victorian-art-architecture/victorian-late", "extended_slug": "humanities/becoming-modern/Victorian-art-architecture/victorian-late", "kind": "Topic", "slug": "victorian-late"}], "in_knowledge_map": false, "description": "Pugin, Burne-Jones and other 19th-century British artists responded to the industrialized present by looking to an idealized past.", "node_slug": "Victorian-art-architecture", "render_type": "Topic", "topic_page_url": "/humanities/becoming-modern/Victorian-art-architecture", "extended_slug": "humanities/becoming-modern/Victorian-art-architecture", "kind": "Topic", "slug": "victorian-art-architecture"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/becoming-modern/avant-garde-france/", "id": "avant-garde-france", "hide": false, "title": "The avant-garde: Realism, Impressionism and Post-Impressionism", "child_data": [{"kind": "Topic", "id": "x79e94e3a"}, {"kind": "Topic", "id": "xdfbfdcce"}, {"kind": "Topic", "id": "x68aeab5d"}, {"kind": "Topic", "id": "x5f5e7272"}, {"kind": "Topic", "id": "x1a93f342"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/avant-garde-france/second-empire/", "id": "second-empire", "hide": false, "title": "Art and the French state", "child_data": [{"kind": "Article", "id": "x2149fa33"}, {"kind": "Video", "id": "670111812"}, {"kind": "Article", "id": "x92ca9d7b"}, {"kind": "Video", "id": "1168530971"}, {"kind": "Exercise", "id": "x7fe95070"}, {"kind": "Exercise", "id": "x1b7a9b3d"}], "children": [{"path": "khan/humanities/becoming-modern/avant-garde-france/second-empire/charles-garnier-the-paris-op-ra-1860-75/", "id": "EtTGyLsR7lk", "title": "Garnier, Paris Op\u00e9ra", "kind": "Video", "description": "Charles Garnier, The Paris Op\u00e9ra, 1860-75", "slug": "charles-garnier-the-paris-op-ra-1860-75"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/second-empire/thomas-couture-romans-of-the-decadence-1847/", "id": "pQJrTf_x7Wk", "title": "Couture, Romans of the Decadence", "kind": "Video", "description": "Thomas Couture, Romans of the Decadence, 1847 (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Beth Harris & Dr. Steven Zucker For more art history videos visit smarthistory.org", "slug": "thomas-couture-romans-of-the-decadence-1847"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/second-empire/couture-romans-of-the-decadence/", "id": "couture--romans-of-the-decadence", "title": "Couture, Romans of the Decadence", "description": "Test your knowledge on this painting.", "slug": "couture-romans-of-the-decadence", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/second-empire/art-and-the-french-state/", "id": "art-and-the-french-state", "title": "Art and the French State", "description": "Test your knowledge!", "slug": "art-and-the-french-state", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Despite the brief dismantling of the Royal Academy during the French Revolution, art remained an extension of the power of the French State which regularly purchased art that it favored (often art that supported its political objectives). Through the Royal Academy (originally been founded by Louis XIV), the state extended its reach to the official exhibitions (salons) and to matters of style and subject matter through the \u00c9cole des Beaux Arts (School of Fine Arts). These were not just the official institutions of art, they were, in essence, the only institutions available for living artists to train and to make their work known. This tutorial looks at a crucial moment for painting, on the eve of the Revolution of 1848. We also examine one of the great State commissions of the Second Empire, the Opera House.", "node_slug": "second-empire", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/avant-garde-france/second-empire", "extended_slug": "humanities/becoming-modern/avant-garde-france/second-empire", "kind": "Topic", "slug": "second-empire"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/avant-garde-france/realism/", "id": "realism", "hide": false, "title": "Realism", "child_data": [{"kind": "Article", "id": "xf1bb0ecb"}, {"kind": "Video", "id": "671385804"}, {"kind": "Article", "id": "x867c8291"}, {"kind": "Video", "id": "669368683"}, {"kind": "Article", "id": "xc89abd34"}, {"kind": "Article", "id": "xf2a651b5"}, {"kind": "Video", "id": "671385805"}, {"kind": "Video", "id": "671718098"}, {"kind": "Video", "id": "671593303"}, {"kind": "Video", "id": "671656228"}, {"kind": "Article", "id": "x92225e8b"}, {"kind": "Video", "id": "1239463263"}, {"kind": "Exercise", "id": "xae462546"}, {"kind": "Video", "id": "671634396"}, {"kind": "Video", "id": "669368684"}, {"kind": "Article", "id": "x65dae5ff"}, {"kind": "Video", "id": "670111809"}, {"kind": "Video", "id": "671718099"}, {"kind": "Video", "id": "669368687"}, {"kind": "Video", "id": "708126673"}, {"kind": "Video", "id": "671385816"}, {"kind": "Video", "id": "671718101"}, {"kind": "Article", "id": "x663fc5e7"}, {"kind": "Exercise", "id": "x7fb90be3"}], "children": [{"path": "khan/humanities/becoming-modern/avant-garde-france/realism/courbet-a-burial-at-ornans-1850/", "id": "zRuLkyLx3No", "title": "Courbet, Burial at Ornans", "kind": "Video", "description": "Gustave Courbet, A Burial at Ornans, begun late summer 1849, completed 1850, exhibited at the Salon of 1850-51, 124 x 260 inches, oil on canvas (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "courbet-a-burial-at-ornans-1850"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/courbet-the-artist-s-studio-1854-55/", "id": "SvFtmPhbNRw", "title": "Courbet, The Artist's Studio, a real allegory summing up seven years of my artistic and moral life", "kind": "Video", "description": "Gustave Courbet, The Artist's Studio; A real allegory summing up seven years of my artistic and moral life, oil on canvas, 1854-55 (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "courbet-the-artist-s-studio-1854-55"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/rosa-bonheur-plowing-in-the-nivernais-1849/", "id": "kOnzZHJYzb4", "title": "Bonheur, Plowing in the Nivernais", "kind": "Video", "description": "Rosa Bonheur, Plowing in the Nivernais (or The First Dressing), oil on canvas, 1849 (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "rosa-bonheur-plowing-in-the-nivernais-1849"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/bonheur-sheep-in-the-highlands-1857/", "id": "76gw8PA12ag", "title": "Bonheur, Sheep in the Highlands", "kind": "Video", "description": "Rosa Bonheur, Sheep in the Highlands, 1857, oil on canvas, 46 x 65 cm (Wallace Collection, London) Speakers: Dr. Beth Harris, Dr. Steven Zucker The Wallace Collection suggests that this painting is likely the result of a trip that the artist made to Scotland the previous year.", "slug": "bonheur-sheep-in-the-highlands-1857"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/millet-l-ang-lus-ca-1857-1859/", "id": "3KjZ3w5MtBo", "title": "Millet, L'Angelus", "kind": "Video", "description": "Jean-Fran\u00e7ois Millet (French), L'Ang\u00e9lus, c. 1857-1859, oil on canvas, 21 x 26 (53.3 \u00d7 66.0 cm) (Mus\u00e9e d'Orsay, Paris) Speakers: Drs. Beth Harris and Steven Zucker For more art history videos, visit Smarthistory.org", "slug": "millet-l-ang-lus-ca-1857-1859"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/millet-gleaners-1857/", "id": "Dk1nuM5JKqQ", "title": "Millet, The Gleaners", "kind": "Video", "description": "Jean-Fran\u00e7ois Millet (French), The Gleaners, 1857, oil on canvas, 33 x 43 in (83.5 x 110 cm) (Mus\u00e9e d'Orsay, Paris) Speakers: Drs. Beth Harris and Steven Zucker http://www.smarthistory.org/jean-francois-millet-french-the-gleaners-1857.html http://www.smarthistory.org/jean-francois-millet-french-the-gleaners-1857.html", "slug": "millet-gleaners-1857"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/manet-olympia-1863-exhibited-1865/", "id": "bihBbqzL96Y", "title": "Manet, Olympia", "kind": "Video", "description": "\u00c9douard Manet, Olympia, oil on canvas, 1863 (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\n\u00a0\n\n\u00c9douard Manet brought to Realism his curiosity about social mores. However, he was not interested in mirroring polite parlor conversations and middle class promenades in the Bois de \u00a0Boulogne (Paris\u2019 Central Park). Rather, Manet invented subjects that set the Parisians\u2019 teeth on edge.\u00a0\n\nIn 1865, Manet submitted his risqu\u00e9 painting of a courtesan greeting her client (in this case, you), Olympia, of 1863, to the French Salon. The jury for the 1865 Salon accepted this painting despite their disapproval of the subject matter, because two years earlier, Manet\u2019s Luncheon on the Grass created such a stir when it was rejected from the Salon. (It was instead exhibited in Emperor Napoleon III\u2019s conciliatory exhibition\u2014the Salon des R\u00e9fus\u00e9s, or the Exhibition of the Refused. Crowds came to the Salon des R\u00e9fus\u00e9s specifically to laugh and jeer at what they considered Manet\u2019s folly.)\n\nSomehow they were afraid another rejection would seem like a personal attack on Manet himself. The reasoning was odd, but the result was the same\u2014Olympia became infamous and the painting had to be hung very high to protect it from physical attacks.\u00a0\n\nManet was a Realist, but sometimes his \u201creal\u201d situations shocked and rocked the Parisian art world to its foundations. His later work was much tamer.\n\n(Text by Dr. Beth Gersh-Nesic)", "slug": "manet-olympia-1863-exhibited-1865"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/manet-s-olympia-quiz/", "id": "manet-s-olympia-quiz", "title": "Manet's Olympia Quiz", "description": "This quiz is for the video Manet, Olympia.", "slug": "manet-s-olympia-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/manet-le-d-jeuner-sur-l-herbe-luncheon-on-the-grass-1863/", "id": "Nb_4nEFyeGk", "title": "Manet, Le d\u00e9jeuner sur l'herbe", "kind": "Video", "description": "\u00c9douard Manet, Le d\u00e9jeuner sur l'herbe (Luncheon on the Grass), oil on canvas, 1863 (Mus\u00e9e d'Orsay, Paris)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "manet-le-d-jeuner-sur-l-herbe-luncheon-on-the-grass-1863"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/douard-manet-the-railway-1872-73/", "id": "2GD1Oz0sPzY", "title": "Manet, The Railway", "kind": "Video", "description": "\u00c9douard Manet, The Railway,1872-73, oil on canvas (National Gallery of Art)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "douard-manet-the-railway-1872-73"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/manet-mile-zola-1868/", "id": "znKX9WcowfY", "title": "Manet, \u00c9mile Zola", "kind": "Video", "description": "\u00c9douard Manet, \u00c9mile Zola, 1868, oil on canvas, 57 x 45 inches or 146.5 x 114 cm\n(Mus\u00e9e d'Orsay, Paris)\n\nThis portrait was painted in appreciation for the support Zola gave to Manet in his\n1866 essay in La Revue du XXe si\u00e8cle and during Manet's independent exhibition \nheld along side the Universal Exposition in 1867.", "slug": "manet-mile-zola-1868"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/manet-the-balcony-1868-69/", "id": "XS8OhYdc-20", "title": "Manet, The Balcony", "kind": "Video", "description": "\u00c9douard Manet, The Balcony, 1868-69, oil on canvas, 66-1/2 x 44-1/4 inches (Mus\u00e9e d'Orsay, Paris)\n\nSpeakers: Drs. Beth Harris and Steven Zucker\n\nhttp://www.smarthistory.org/manets-the-balcony.html\n\nThe three principal figures depicted are each a friend of the artist. From left to right they are: the painters Berthe Morisot and Jean Baptiste Antoine Guillemet, and Fanny Claus, a violinist. Some have suggested that the fourth figure, barely visible in the shadows, is the young Leon Leenhoff, the son of Manet's wife.", "slug": "manet-the-balcony-1868-69"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/douard-manet-plum-brandy-c-1877/", "id": "K3XTsNlcDS8", "title": "Manet, Plum Brandy", "kind": "Video", "description": "\u00c9douard Manet, Plum Brandy, c. 1877, oil on canvas (National Gallery of Art)\n\nSpeakers: Dr. Steven Zucker, Dr. Beth Harris", "slug": "douard-manet-plum-brandy-c-1877"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/edouard-manet-in-the-conservatory-1878-1879/", "id": "eNhrYgYV0MA", "title": "Manet, In the Conservatory", "kind": "Video", "description": "Edouard Manet, In the Conservatory, 1878-1879, oil on canvas, 115 x 150 cm (Alte Nationalgalerie, Staatliche Museen zu Berlin)", "slug": "edouard-manet-in-the-conservatory-1878-1879"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/douard-manet-a-bar-at-the-folies-berg-re-1882/", "id": "kMACjCg9r4E", "title": "Manet, A Bar at the Folies-Berg\u00e8re", "kind": "Video", "description": "\u00c9douard Manet, A Bar at the Folies-Berg\u00e8re, 1882 (Courtauld Gallery, London) \n\nSpeakers: Beth Harris and Steven Zucker\n\nFor more videos see www.smarthistory.org", "slug": "douard-manet-a-bar-at-the-folies-berg-re-1882"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/manet-corner-of-a-caf-concert-1878-80/", "id": "BXzR-hdSFUY", "title": "Manet, Corner of a Caf\u00e9-Concert", "kind": "Video", "description": "Edouard Manet, Corner of a Caf\u00e9-Concert, 1878-80, 97.1 x 77.5 cm (National Gallery, London)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "manet-corner-of-a-caf-concert-1878-80"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/realism/realism/", "id": "realism", "title": "Realism", "description": "Test your knowledge!", "slug": "realism", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In the mid-Nineteenth Century, great art was still defined as art that took it\u2019s subjects from religion, history or mythology and its style from ancient Greece and Rome. Hardly what we would consider modern and appropriate for an industrial, commercial, urban culture! Courbet agreed, and so did his friend, the writer Charles Baudelaire who called for an art that would depict, as he called it, the beauty of modern life. Courbet painted the reality of life in the countryside\u2014not the idealized peasants that were the usual fare at the exhibits in Paris. The revolution of 1848, in which both the working class and the middle class played a significant role, set the stage for Realism. Later, Manet and then Degas painted modern life in Paris, a city which was undergoing rapid modernization in the period after 1855 (the Second Empire).", "node_slug": "realism", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/avant-garde-france/realism", "extended_slug": "humanities/becoming-modern/avant-garde-france/realism", "kind": "Topic", "slug": "realism"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/", "id": "impressionism", "hide": false, "title": "Impressionism", "child_data": [{"kind": "Article", "id": "xacd1a31d"}, {"kind": "Article", "id": "x532f79fd"}, {"kind": "Video", "id": "671385812"}, {"kind": "Video", "id": "719842167"}, {"kind": "Video", "id": "671593304"}, {"kind": "Video", "id": "719474985"}, {"kind": "Video", "id": "669368685"}, {"kind": "Video", "id": "816157054"}, {"kind": "Video", "id": "671738041"}, {"kind": "Video", "id": "719728953"}, {"kind": "Article", "id": "xfb844287"}, {"kind": "Video", "id": "719786825"}, {"kind": "Video", "id": "669368686"}, {"kind": "Video", "id": "719786828"}, {"kind": "Article", "id": "xf5b3b7e3"}, {"kind": "Video", "id": "671718104"}, {"kind": "Video", "id": "671385814"}, {"kind": "Video", "id": "671656226"}, {"kind": "Exercise", "id": "xa11fad80"}, {"kind": "Video", "id": "719513885"}, {"kind": "Video", "id": "719786826"}, {"kind": "Video", "id": "671718103"}, {"kind": "Video", "id": "671738042"}, {"kind": "Video", "id": "671385809"}, {"kind": "Video", "id": "719781805"}, {"kind": "Video", "id": "669368688"}, {"kind": "Video", "id": "719842169"}, {"kind": "Video", "id": "670111813"}, {"kind": "Exercise", "id": "xee69130b"}], "children": [{"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/degas-the-bellelli-family-1858-67/", "id": "irLOxG7SpUk", "title": "Degas, The Bellelli Family", "kind": "Video", "description": "Edgar Degas, The Bellelli Family, 1858-67, oil on canvas, 78-3/4 x 98-1/2 inches, 200 x 250 cm (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker.\nDegas was in his mid-twenties when he painted this canvas. It depicts from left to right, the ten-year-old Giovanna, her mother, the artist's paternal aunt Laura, her younger daughter, Giula age 7, and the Baron Gennaro Bellelli. Preperatory sketches for the painting may have been made in Florence where the family was living\u2014the Baron had been exiled from Naples. The picture may have been completed in Paris.", "slug": "degas-the-bellelli-family-1858-67"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/edgar-degas-at-the-races-in-the-countryside-1869/", "id": "6HTBjvqn9uw", "title": "Degas, At the Races in the Countryside", "kind": "Video", "description": "Edgar Degas, At the Races in the Countryside, 1869, oil on canvas, 36.5 x 55.9 cm / 14-3/8 x 22 inches (Museum of Fine Arts, Boston)", "slug": "edgar-degas-at-the-races-in-the-countryside-1869"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/degas-the-dance-class-1874/", "id": "NigP3DjV3NY", "title": "Degas, The Dance Class", "kind": "Video", "description": "Edgar Degas, The Dance Class, oil on canvas, 1874 (Metropolitan Museum of Art) Speakers: Dr. Steven Zucker, Dr. Beth Harris", "slug": "degas-the-dance-class-1874"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/edgar-degas-visit-to-a-museum-c-1879-90/", "id": "wvtPCKwGZCU", "title": "Degas, Visit to a Museum", "kind": "Video", "description": "Edgar Degas, Visit to a Museum, c. 1879--90, oil on canvas, 91.8 x 68 cm / 36-1/8 x 26-3/4 inches (Museum of Fine Arts, Boston)", "slug": "edgar-degas-visit-to-a-museum-c-1879-90"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/caillebotte-the-floor-scrapers-1875/", "id": "eKj12_KS8m0", "title": "Caillebotte, The Floor Scrapers", "kind": "Video", "description": "Gustave Caillebotte, The Floor Scrapers (Les raboteurs de parquet), 1875, oil on canvas, 102 x 146.5 cm (Mus\u00e9e d'Orsay, Paris). Speakers: Dr. Parmi Giuntini, Director of Art History, Otis College of Art and Design and Dr. Robert Summers, lecturer, Otis College of Art and Design", "slug": "caillebotte-the-floor-scrapers-1875"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/gustave-caillebotte-paris-street-rainy-day-1877/", "id": "U8d45ETt78o", "title": "Gustave Caillebotte, Paris Street; Rainy Day", "kind": "Video", "description": "Gustave Caillebotte, Paris Street; Rainy Day, 1877, oil on canvas 83-1/2 x 108-3/4 inches / 212.2 x 276.2 cm (The Art Institute of Chicago). In the Google Art Project: http://www.googleartproject.com/collection/the-art-institute-of-chicago/artwork/paris-street-rainy-day-gustave-caillebotte/425239/ View this work up close on the Google Art Project: http://www.googleartproject.com/collection/the-art-institute-of-chicago/artwork/paris-street-rainy-day-gustave-caillebotte/425239/", "slug": "gustave-caillebotte-paris-street-rainy-day-1877"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/caillebotte-man-at-his-bath-1884/", "id": "cYUVtdpTlEo", "title": "Caillebotte, Man at his Bath", "kind": "Video", "description": "Gustave Caillebotte, Man at his Bath, 1884, oil on canvas, 57 x 45 in. (144.8 x 114.3 cm), (Private Collection, on loan to the National Gallery, London) Speakers: Dr. Parme Giuntini, Director of Art History, Otis College of Art and Design Dr. Robert Summers, Lecturer, Otis College of Art and Design", "slug": "caillebotte-man-at-his-bath-1884"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/mary-cassatt-in-the-loge-1878/", "id": "HVuyK_vIMfc", "title": "Cassatt, In the Loge", "kind": "Video", "description": "Mary Cassatt, In the Loge, 1878, oil on canvas, 81.28 x 66.04 cm / 32 x 26 inches (Museum of Fine Arts, Boston), speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nIn nineteenth century France, the gaze of the observer\u2014whether on Napoleon's grand new boulevards or in the opera\u2014was very much structured by issues of economic status. Mary Cassatt's remarkable painting In the Loge (c. 1878-79) clearly shows the complex relationship between the gaze, public spectacle, gender, and class privilege.\n\nCassatt was a wealthy American artist who had adopted the style of the Impressionists while living in Paris. Here she depicts a fashionable upper-class woman in a box seat at the Paris opera (as it happens, the sitter is Cassatt's sister, Lydia). Lydia is shown holding opera glasses up to her eyes; but instead of tilting them down, as she would if she were watching the performance below, her gaze is level. She peers straight across the chamber perhaps at another member of the audience. Look closely and you will notice that, in turn, and in one of the boxes across the room, a gentleman is gazing at her. Lydia is then, in a sense, caught between his gaze and ours even as she spies another.", "slug": "mary-cassatt-in-the-loge-1878"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/mary-cassatt-woman-with-a-pearl-necklace-in-a-loge-1879/", "id": "guxLpVICBjg", "title": "Cassatt, Woman with a Pearl Necklace in a Loge", "kind": "Video", "description": "Mary Cassatt, Woman with a Pearl Necklace in a Loge, 1879, oil on canvas, 32 x 23-1/2 inches or 81.3 x 59.7 cm (Philadelphia Museum of Art)", "slug": "mary-cassatt-woman-with-a-pearl-necklace-in-a-loge-1879"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/cassatt-the-loge-1882/", "id": "zOZiuAOuOkA", "title": "Cassatt, The Loge", "kind": "Video", "description": "Mary Cassatt, The Loge, oil on canvas, 1882. 31-7/16 x 25-1/8 inches (National Gallery of Art)\n\nSpeakers: Beth Harris and Steven Zucker", "slug": "cassatt-the-loge-1882"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/mary-cassatt-the-child-s-bath-1893/", "id": "O4St29B7cmU", "title": "Cassatt, The Child's Bath", "kind": "Video", "description": "Mary Cassatt, The Child's Bath, 1893, oil on canvas, 100.3 x 66.1 cm / 39-1/2 x 26 inches (Art Institute of Chicago)", "slug": "mary-cassatt-the-child-s-bath-1893"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/mary-cassatt-breakfast-in-bed-1897/", "id": "gDbpcwwUgjI", "title": "Cassatt, Breakfast in Bed", "kind": "Video", "description": "Mary Cassatt, Breakfast In Bed, 1897 (Huntington Library) \n\nSpeakers: Beth Harris and Steven Zucker", "slug": "mary-cassatt-breakfast-in-bed-1897"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/monet-the-argenteuil-bridge-1874/", "id": "Iics7KH_rLE", "title": "Monet, The Argenteuil Bridge", "kind": "Video", "description": "Claude Monet, The Argenteuil Bridge, 1874, oil on canvas, 60.5 x 80 cm (Mus\u00e9e d'Orsay, Paris) Speakers: Drs. Beth Harris and Steven Zucker Please note that there is significant background chatter in this video, the Mus\u00e9e d'Orsay is happily a very busy museum and this painting is hung in a relatively small room. http://www.smarthistory.org/monet-the-argenteuil-bridge.html", "slug": "monet-the-argenteuil-bridge-1874"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/claude-monet-gare-st-lazare-1877/", "id": "sYQ5CSyACpc", "title": "Monet, Gare St. Lazare", "kind": "Video", "description": "Claude Monet, Gare St. Lazare, 1877 (Musee d'Orsay)", "slug": "claude-monet-gare-st-lazare-1877"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/monet-s-gare-st-lazare-quiz/", "id": "monet-s-gare-st--lazare-quiz", "title": "Monet's Gare St. Lazare Quiz", "description": "This quiz is for the video Monet, Gare St. Lazare.", "slug": "monet-s-gare-st-lazare-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/claude-monet-cliff-walk-at-pourville-1882/", "id": "D8cHdto-G-I", "title": "Monet, Cliff Walk at Pourville", "kind": "Video", "description": "Claude Monet, Cliff Walk at Pourville, 1882, oil on canvas, 26-1/8 x 32-7/16 inches / 66.5 x 82.3 cm (Art Institute of Chicago)", "slug": "claude-monet-cliff-walk-at-pourville-1882"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/claude-monet-poplars-1891/", "id": "JCKshDyxjuw", "title": "Monet, Poplars", "kind": "Video", "description": "Claude Monet, Poplars, 1891, oil on canvas, 36-5/8 x 29-3/16 inches / 93 x 74.1 cm (Philadelphia Museum of Art)", "slug": "claude-monet-poplars-1891"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/monet-rouen-cathedral-series-1892-4/", "id": "LnPKrSVMLnQ", "title": "Monet, Rouen Cathedral Series", "kind": "Video", "description": "Claude Monet\u200b painted more than 30 canvases depicting Rouen cathedral between 1892 and 1894. This video discusses the following four paintings in the collection of the Mus\u00e9e d'Orsay in Paris: Rouen Cathedral (The Portal, Grey Weather), 1894, oil on canvas, 100 x 65 cm Rouen Cathedral (The Portal and the Tour d'Albane, Morning Effect), 1894, oil on canvas, 106 x 73 cm Rouen Cathedral (The Portal, Harmony in Blue), 1894, oil on canvas, 91 x 63 cm Claude Monet, Rouen Cathedral (The Portal and the Tour d'Albane in the Sunlight), 1894, oil on canvas, 107 x 73 cm Speakers: Drs. Beth Harris and Steven Zucker", "slug": "monet-rouen-cathedral-series-1892-4"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/monet-les-nymph-as-the-water-lilies-1918-26/", "id": "6fHorNn2zqQ", "title": "Monet, Water Lilies", "kind": "Video", "description": "Claude Monet, Les Nymph\u00e9as (The Water Lilies), suite of paintings on permanent exhibition at the Mus\u00e9e de l'Orangerie in Paris: Room 1: Morning, oil on two canvas panels, 200 x 425 cm, c. 1918-26 Clouds, oil on three canvas panels, 200 x 1275 cm, c. 1918-26 Green Highlights, oil on two canvas panels, 200 x 850 cm, c. 1918-26 Sunset, oil on canvas, 200 x 600 cm, c. 1918-26 Room 2: Reflection of Trees, oil on two canvas panels, 200 x 850 cm, c. 1918-26 The Morning Light, the willows, oil on three canvas panels, 200 x 1275 cm, c. 1918-26 The Morning Willows, oil on three canvas panels, 200 x 1275 cm, c. 1918-26 The Two Willows, oil on four canvas panels, 200 x 1700 cm, c. 1918-26 Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "monet-les-nymph-as-the-water-lilies-1918-26"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/pierre-auguste-renoir-la-loge-1874/", "id": "_uUD1ZP79tE", "title": "Renoir, La Loge", "kind": "Video", "description": "Pierre Auguste Renoir, La Loge, 1874, oil on canvas, 31 1/2 x 24 5/8 in. (80 x 63.5 cm) (Courtauld Gallery, London) Speakers: Dr. Beth Harris, Rachel S. Ropeik This painting was exhibited by Renoir at the first Impressionist exhibition in Paris (1874).", "slug": "pierre-auguste-renoir-la-loge-1874"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/pierre-auguste-renoir-the-grands-boulevards-1875/", "id": "3SmyaLwpSaI", "title": "Renoir, The Grands Boulevards", "kind": "Video", "description": "Pierre-Auguste Renoir, The Grands Boulevards, 1875, oil on canvas, 20-1/2 x 25 inches / 52.1 x 63.5 cm (Philadelphia Museum of Art)", "slug": "pierre-auguste-renoir-the-grands-boulevards-1875"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/renoir-moulin-de-la-galette-1876/", "id": "x6rAFt5FW_Q", "title": "Renoir, Moulin de la Galette", "kind": "Video", "description": "Pierre-Auguste Renoir, Moulin de la Galette, 1876, oil on canvas, 51 1/2 x 68 7/8 in. (131 x 175 cm), (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "renoir-moulin-de-la-galette-1876"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/pierre-auguste-renoir-the-large-bathers-1884-87/", "id": "7qaxUhbiQUc", "title": "Renoir, The Large Bathers", "kind": "Video", "description": "Pierre-Auguste Renoir, The Large Bathers, 1884-87, oil on canvas, 46-3/8 x 67-1/4 inches / 117.8 x 170.8 cm (Philadelphia Museum of Art)", "slug": "pierre-auguste-renoir-the-large-bathers-1884-87"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/morisot-the-mother-and-sister-of-the-artist-c-1869-1870/", "id": "BSQr7Ii_vbY", "title": "Morisot, The Mother and Sister of the Artist", "kind": "Video", "description": "Berthe Morisot, The Mother and Sister of the Artist, c. 1869/1870, oil on canvas\n39 3/4 x 32 3/16 in. (101 x 81.8 cm), (National Gallery of Art)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker\n\nhttp://smarthistory.org/morisots-mother-and-sister-of-the-artist.html", "slug": "morisot-the-mother-and-sister-of-the-artist-c-1869-1870"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/impressionism/impressionism/", "id": "impressionism", "title": "Impressionism", "description": "Test your knowledge.", "slug": "impressionism", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Impressionism is both a style, and the name of a group of artists who did something radical\u2014in 1874 they banded together and held their own independent exhibition. These artists described, in fleeting sensations of light, the new leisure pastimes of the city and its suburbs It\u2019s hard to imagine, but at this time in France, the only place of consequence that artists could exhibit their work was the official government-sanctioned exhibitions (called salons), held just once a year, and controlled by a conservative jury. The Impressionists painted modern Paris and landscapes with a loose open brushstrokes, bright colors, and unconventional compositions\u2014none of which was appreciated by the salon jury!", "node_slug": "impressionism", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/avant-garde-france/impressionism", "extended_slug": "humanities/becoming-modern/avant-garde-france/impressionism", "kind": "Topic", "slug": "impressionism"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/", "id": "post-impressionism", "hide": false, "title": "Post-Impressionism", "child_data": [{"kind": "Video", "id": "671634393"}, {"kind": "Video", "id": "719842168"}, {"kind": "Video", "id": "671656229"}, {"kind": "Article", "id": "xf9c89506"}, {"kind": "Article", "id": "x96f21f25"}, {"kind": "Video", "id": "719804658"}, {"kind": "Article", "id": "xc83252f7"}, {"kind": "Video", "id": "xe131f51e"}, {"kind": "Video", "id": "671656227"}, {"kind": "Video", "id": "671385811"}, {"kind": "Article", "id": "x4a3aee6e"}, {"kind": "Article", "id": "x752ce975"}, {"kind": "Article", "id": "x2e449e47"}, {"kind": "Article", "id": "x03ccb62f"}, {"kind": "Article", "id": "xe70384b1"}, {"kind": "Article", "id": "x230cb19e"}, {"kind": "Video", "id": "671738038"}, {"kind": "Article", "id": "x5fbcfa70"}, {"kind": "Video", "id": "719786823"}, {"kind": "Video", "id": "669368682"}, {"kind": "Article", "id": "x6d8b4c4c"}, {"kind": "Article", "id": "x0407cafe"}, {"kind": "Article", "id": "xb52a0c48"}, {"kind": "Video", "id": "719474984"}, {"kind": "Video", "id": "719786827"}, {"kind": "Video", "id": "xda0a751e"}, {"kind": "Video", "id": "719836280"}, {"kind": "Exercise", "id": "xbb93707a"}], "children": [{"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/seurat-bathers-at-asni-res-1884/", "id": "9bs1iQ14LJY", "title": "Seurat, Bathers at Asni\u00e8res", "kind": "Video", "description": "Georges Seurat, Bathers at Asni\u00e8res, 1884, oil on canvas, 6.6 x 9.8 ft (National Gallery, London) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "seurat-bathers-at-asni-res-1884"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/georges-seurat-a-sunday-on-la-grande-jatte-1884-1884-86/", "id": "wNB9Vm6MoDQ", "title": "Seurat, A Sunday on La Grande Jatte", "kind": "Video", "description": "Georges Seurat, A Sunday on La Grande Jatte - 1884, 1884-86, oil on canvas, 81-3/4 x 121-1/4 inches / 207.5 x 308.1 cm (The Art Institute of Chicago). In the Google Art project: http://www.googleartproject.com/collection/the-art-institute-of-chicago/artwork/a-sunday-on-la-grande-jatte-1884-georges-seurat/609033/", "slug": "georges-seurat-a-sunday-on-la-grande-jatte-1884-1884-86"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/vincent-van-gogh-self-portrait-dedicated-to-paul-gauguin-1888/", "id": "gqSpWPONekE", "title": "Van Gogh, Self-Portrait Dedicated to Paul Gauguin", "kind": "Video", "description": "Vincent van Gogh, Self-Portrait Dedicated to Paul Gauguin, 1888, oil on canvas, 24 x 19-11/16 inches (Fogg, Harvard Art Museums) Speakers: Dr. Beth Harris and Dr. Steven Zucker http://smarthistory.org/van-gogh-self-portrait-dedicated-to-paul-gauguin.html", "slug": "vincent-van-gogh-self-portrait-dedicated-to-paul-gauguin-1888"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/vincent-van-gogh-the-bedroom-1889/", "id": "E1tA9-ypx0g", "title": "Van Gogh, The Bedroom", "kind": "Video", "description": "Vincent van Gogh, The Bedroom, 1889, oil on canvas, 29 x 36-5/8 inches / 73.6 x 92.3 cm (Art Institute of Chicago)", "slug": "vincent-van-gogh-the-bedroom-1889"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/gauguin-vision-after-the-sermon/", "id": "y5lhKvKvWPg", "title": "Paul Gauguin, Vision after the Sermon, or Jacob Wrestling with the Angel", "kind": "Video", "description": "Paul Gauguin, Vision after the Sermon, or Jacob Wrestling with the Angel, 1888, oil on canvas, 2' 4 3/4\" x 3' 1/2\" (National Gallery of Scotland, Edinburgh)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "gauguin-vision-after-the-sermon"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/paul-gauguin-nevermore-1897/", "id": "pQu1RMIkg3c", "title": "Gauguin, Nevermore", "kind": "Video", "description": "Paul Gauguin, Nevermore, 1897, oil on canvas (Courtauld Gallery, London) Speakers: Dr. Beth Harris, Rachel Ropeik, Dr. Steven Zucker", "slug": "paul-gauguin-nevermore-1897"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/paul-gauguin-the-red-cow-1889/", "id": "ofJS_K0Fj2Q", "title": "Gauguin, The Red Cow", "kind": "Video", "description": "Paul Gauguin, The Red Cow, 1889, oil on canvas (LACMA) Note: Despite my saying that the cypress trees suggest this canvas may have been painted in the south, it was painted in Le Pouldu near Pont-Aven in Brittany (SZ).", "slug": "paul-gauguin-the-red-cow-1889"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/c-zanne-still-life-with-plaster-cupid-c-1895/", "id": "XBPgPEo0Xx4", "title": "C\u00e9zanne, Still Life with Plaster Cupid", "kind": "Video", "description": "Paul C\u00e9zanne, Still Life with Plaster Cupid, oil on canvas, c.1895 (Courtauld Gallery, London) Speakers: Beth Harris, Rachel Ropeik, and Steven Zucker For more: http://smarthistory.org/Cezannes-Still-Life-with-Apples.html", "slug": "c-zanne-still-life-with-plaster-cupid-c-1895"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/paul-c-zanne-the-red-rock-c-1895/", "id": "2Vv9BhnE0SQ", "title": "C\u00e9zanne, The Red Rock", "kind": "Video", "description": "Paul C\u00e9zanne, The Red Rock, c. 1895, oil on canvas, 91 x 66 cm (Mus\u00e9e de l'Orangerie, Paris)", "slug": "paul-c-zanne-the-red-rock-c-1895"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/c-zanne-still-life-with-apples-1895-98-moma/", "id": "hH1a1v1JNAk", "title": "C\u00e9zanne, Still Life with Apples", "kind": "Video", "description": "C\u00e9zanne, Still Life with Apples,\u00a01895-98 (MoMA). Speakers:\u00a0Beth Harris and Steven Zucker.", "slug": "c-zanne-still-life-with-apples-1895-98-moma"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/paul-c-zanne-bathers-les-grandes-baigneuses-c-1894-1905/", "id": "iQY3SdZeZ6g", "title": "C\u00e9zanne, Bathers", "kind": "Video", "description": "Paul C\u00e9zanne, Bathers (Les Grandes Baigneuses), c. 1894-1905, oil on canvas, 127.2 x 196.1 cm (The National Gallery, London)", "slug": "paul-c-zanne-bathers-les-grandes-baigneuses-c-1894-1905"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/paul-c-zanne-the-large-bathers-1906/", "id": "YFtf-xA7_oM", "title": "Cezanne, The Large Bathers", "kind": "Video", "description": "Paul C\u00e9zanne, The Large Bathers, 1906, oil on canvas, 82-7/8 x 98-3/4 inches / 210.5 x 250.8 cm (Philadelphia Museum of Art). In the Google Art Project: http://www.googleartproject.com/collection/philadelphia-museum-of-art/artwork/the-large-bathers-paul-cezanne-french-1839-1906/808050/", "slug": "paul-c-zanne-the-large-bathers-1906"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/paul-cezanne-approach-watercolor/", "id": "-Bykx5cBKMI", "title": "Paul C\u00e9zanne's approach to watercolor", "kind": "Video", "description": "Learn how watercolors are created and how Paul C\u00e9zanne applied his unique approach to the medium by using pencil lines as an active part of composition, as exemplified by his Still Life. Love art? Follow us on Google+\u00a0at http://bit.ly/gettygoogleplus", "slug": "paul-cezanne-approach-watercolor"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/henri-de-toulouse-lautrec-at-the-moulin-rouge-1893-95/", "id": "XLcbGHNFcpM", "title": "Toulouse-Lautrec, At the Moulin Rouge", "kind": "Video", "description": "Henri de Toulouse-Lautrec, At the Moulin Rouge, 1893-95, oil on canvas, 48-1/2 x 55-1/2 inches / 123 x 141 cm (Art Institute of Chicago)", "slug": "henri-de-toulouse-lautrec-at-the-moulin-rouge-1893-95"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/post-impressionism/post-impressionism/", "id": "post-impressionism", "title": "Post-Impressionism", "description": "Test your knowledge.", "slug": "post-impressionism", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The work of van Gogh, Gauguin, C\u00e9zanne and Seurat together constitute Post-Impressionism and yet their work is so varied and unrelated, we might never otherwise think of these four artists as a group. Certainly van Gogh and Gauguin were friends and they briefly painted together, but each of these artists was concerned with solving particular issues that had to do with their own individual sensibility. Ironically, if anything ties these artists together it is this focus on subjectivity. This tutorial explores the sketchy multiperspectival views of C\u00e9zanne, Seurat\u2019s systematized critiques of upper middle-class Paris, Gauguin\u2019s fascination with the primitive and exotic, and van Gogh\u2019s unerring ability to convey deeply human experiences.", "node_slug": "post-impressionism", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/avant-garde-france/post-impressionism", "extended_slug": "humanities/becoming-modern/avant-garde-france/post-impressionism", "kind": "Topic", "slug": "post-impressionism"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/becoming-modern/avant-garde-france/avant-garde-sculpture/", "id": "avant-garde-sculpture", "hide": false, "title": "Sculpture", "child_data": [{"kind": "Video", "id": "671738039"}, {"kind": "Article", "id": "x71c05f34"}, {"kind": "Video", "id": "671656230"}, {"kind": "Article", "id": "xe481294b"}], "children": [{"path": "khan/humanities/becoming-modern/avant-garde-france/avant-garde-sculpture/jean-baptiste-carpeaux-dance-1865-69/", "id": "3ZGmMTNyW0k", "title": "Carpeaux, Dance", "kind": "Video", "description": "Jean-Baptiste Carpeaux\u200b, Dance, 1865-69, marble, 420 x 298 cm.\n(Mus\u00e9e d'Orsay, Paris).\n\nCommissioned by Charles Garnier for the facade of L'Op\u00e9ra. In 1964 it was replaced by a copy executed by Paul Belmondo.", "slug": "jean-baptiste-carpeaux-dance-1865-69"}, {"path": "khan/humanities/becoming-modern/avant-garde-france/avant-garde-sculpture/rodin-the-gates-of-hell-1880-1917/", "id": "TgLTzYXg530", "title": "Rodin, The Gates of Hell", "kind": "Video", "description": "Auguste Rodin, The Gates of Hell\u200b, 1880-1917, plaster (Mus\u00e9e d'Orsay, Paris)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nWhen the building, earlier on the site of the Mus\u00e9e d'Orsay in Paris, was destroyed by fire during the Commune in 1871, plans were drawn up to replace it with a museum of decorative arts. Rodin won the competition to design a great set of doors for its entry way. Although the museum was never built, Rodin continued to work on the doors. They became an ongoing project; a grand stage for his sculptural ideas. It's fitting that the plaster of this great unfinished sculpture, The Gates of Hell, is now on display at the d'Orsay, the former railway terminal that was built on this site instead of the museum of decorative arts and that, by lovely coincidence, was converted into one of the world's great art museums.", "slug": "rodin-the-gates-of-hell-1880-1917"}], "in_knowledge_map": false, "description": "Sculpture, like painting, had its avant-garde though because marble statues of the human body were seen in direct comparison to the classical tradition, experimentation was often seen as even more radical.", "node_slug": "avant-garde-sculpture", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/avant-garde-france/avant-garde-sculpture", "extended_slug": "humanities/becoming-modern/avant-garde-france/avant-garde-sculpture", "kind": "Topic", "slug": "avant-garde-sculpture"}], "in_knowledge_map": false, "description": "Courbet, Manet, Degas, and van Gogh used subjective experience to invent new ways to see.", "node_slug": "avant-garde-france", "render_type": "Topic", "topic_page_url": "/humanities/becoming-modern/avant-garde-france", "extended_slug": "humanities/becoming-modern/avant-garde-france", "kind": "Topic", "slug": "avant-garde-france"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/becoming-modern/symbolism/", "id": "symbolism", "hide": false, "title": "Symbolism & Art Nouveau", "child_data": [{"kind": "Video", "id": "708138869"}, {"kind": "Video", "id": "670111814"}, {"kind": "Article", "id": "x1f605743"}, {"kind": "Video", "id": "670111810"}, {"kind": "Video", "id": "1159664939"}, {"kind": "Article", "id": "x2e0329da"}, {"kind": "Video", "id": "1159664940"}, {"kind": "Video", "id": "x51fcf74f"}, {"kind": "Video", "id": "867037959"}, {"kind": "Video", "id": "868390389"}, {"kind": "Exercise", "id": "xd2dab45c"}, {"kind": "Video", "id": "708175163"}, {"kind": "Video", "id": "670111815"}, {"kind": "Article", "id": "xbd76ba50"}, {"kind": "Video", "id": "x305a7f04"}, {"kind": "Video", "id": "x2596ee43"}, {"kind": "Video", "id": "x00b1846c"}, {"kind": "Exercise", "id": "x248facc9"}], "children": [{"path": "khan/humanities/becoming-modern/symbolism/arnold-b-cklin-self-portrait-with-death-playing-the-fiddle-1872/", "id": "3oeLGKeNPj0", "title": "B\u00f6cklin, Self-Portrait with Death Playing the Fiddle", "kind": "Video", "description": "Arnold B\u00f6cklin, Self-Portrait with Death Playing the Fiddle, 1872, oil on canvas, 75 x 61 cm (Alte Nationalgalerie, Berlin)", "slug": "arnold-b-cklin-self-portrait-with-death-playing-the-fiddle-1872"}, {"path": "khan/humanities/becoming-modern/symbolism/gaud-church-of-the-sagrada-fam-lia-1882-consecrated-2010-still-under-construction/", "id": "SMqERP-J2tQ", "title": "Gaud\u00ed, Sagrada Fam\u00edlia", "kind": "Video", "description": "Antoni Gaud\u00ed, Church of the Sagrada Fam\u00edlia or Bas\u00edlica i Temple Expiatori de la Sagrada Fam\u00edlia Basilica, 1882- (consecrated 2010, but still under construction), Barcelona, Spain", "slug": "gaud-church-of-the-sagrada-fam-lia-1882-consecrated-2010-still-under-construction"}, {"path": "khan/humanities/becoming-modern/symbolism/khnopff-jeanne-k-fer-1885/", "id": "cIpEZXOAn0I", "title": "Khnopff, Jeanne K\u00e9fer", "kind": "Video", "description": "Fernand Khnopff, Jeanne K\u00e9fer, oil on canvas, 1885 (The Getty Center, Los Angeles) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "khnopff-jeanne-k-fer-1885"}, {"path": "khan/humanities/becoming-modern/symbolism/fernand-khnopff-i-lock-my-door-upon-myself-1891/", "id": "Nk4DmlnoLxw", "title": "Khnopff, I Lock My Door Upon Myself", "kind": "Video", "description": "Fernand Khnopff, I Lock My Door Upon Myself, 1891 (Neue Pinakothek, Munich) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "fernand-khnopff-i-lock-my-door-upon-myself-1891"}, {"path": "khan/humanities/becoming-modern/symbolism/franz-von-stuck-the-sin-1893/", "id": "muJatqh6wRM", "title": "Stuck, The Sin", "kind": "Video", "description": "Franz von Stuck, The Sin, 1893 (Neue Pinakothek, Munich) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "franz-von-stuck-the-sin-1893"}, {"path": "khan/humanities/becoming-modern/symbolism/hector-guimard-cit-entrance-paris-m-tropolitain-c-1900/", "id": "sazsDYOXVis", "title": "Hector Guimard, Cit\u00e9 entrance, Paris M\u00e9tropolitain", "kind": "Video", "description": "Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "hector-guimard-cit-entrance-paris-m-tropolitain-c-1900"}, {"path": "khan/humanities/becoming-modern/symbolism/gustav-klimt-beethoven-frieze-vienna-secession-1902/", "id": "983Tu9rlP54", "title": "Gustav Klimt, Beethoven Frieze", "kind": "Video", "description": "Gustav Klimt, Beethoven Frieze, Vienna Secession, 1902 A conversation with Khan Academy's Dr. Steven Zucker and Dr. Beth Harris\n\nIn the News: The heirs of the Austrian Jewish collector who owned this work before World War II recently lost their case to recover it.\u00a0 Learn more:\u00a0March 7, 2015 New York Times article", "slug": "gustav-klimt-beethoven-frieze-vienna-secession-1902"}, {"path": "khan/humanities/becoming-modern/symbolism/gustav-klimt-the-kiss-1907-8/", "id": "BRUOACBkFRg", "title": "Gustav Klimt, The Kiss", "kind": "Video", "description": "Gustav Klimt, The Kiss, 1907-8, oil and gold leaf on canvas, 180 x 180 cm (\u00d6sterreichische Galerie Belvedere, Vienna)", "slug": "gustav-klimt-the-kiss-1907-8"}, {"path": "khan/humanities/becoming-modern/symbolism/klimt-s-the-kiss-quiz/", "id": "klimt-s-the-kiss-quiz", "title": "Klimt's The Kiss Quiz", "description": "This quiz is for the video Gustav Klimt, The Kiss", "slug": "klimt-s-the-kiss-quiz", "kind": "Exercise"}, {"path": "khan/humanities/becoming-modern/symbolism/gustav-klimt-death-and-life-1910/", "id": "P1Lw1NVcI8o", "title": "Klimt, Death and Life", "kind": "Video", "description": "Gustav Klimt, Death and Life, 1910, reworked 1915, oil on canvas, 178 x 198 cm (Leopold Museum, Vienna)", "slug": "gustav-klimt-death-and-life-1910"}, {"path": "khan/humanities/becoming-modern/symbolism/munch-the-storm-1893/", "id": "653ZKHd_PYo", "title": "Munch, The Storm", "kind": "Video", "description": "Edvard Munch, The Storm, 1893, oil on canvas, 36 1/8 x 51 1/2\" (91.8 x 130.8 cm), (MoMA)\n\nSpeakers: Dr. Juliana Kreinik, Dr. Amy Hamlin", "slug": "munch-the-storm-1893"}, {"path": "khan/humanities/becoming-modern/symbolism/moma-costume-design-ballet-the-firebird/", "id": "hqynp3DH9NU", "title": "L\u00e9on Bakst, \"Costume design for the ballet The Firebird\"", "kind": "Video", "description": "To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945 or Pigment to Pixel: Color in Modern and Contemporary Art.", "slug": "moma-costume-design-ballet-the-firebird"}, {"path": "khan/humanities/becoming-modern/symbolism/ephemeral/", "id": "ltdN7LnWJPY", "title": "Tiffany, Hair Ornament", "kind": "Video", "description": "Met curator Alice Cooney Frelinghuysen on transience in Louis Comfort Tiffany\u2019s Hair Ornament, c. 1904.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit\u00a0Find an Educator Resource.", "slug": "ephemeral"}, {"path": "khan/humanities/becoming-modern/symbolism/moma-tiffany-vase/", "id": "RaeSwi80g3Q", "title": "Louis Comfort Tiffany, Vase", "kind": "Video", "description": "For more information please visit\u00a0http://www.moma.org/1913", "slug": "moma-tiffany-vase"}, {"path": "khan/humanities/becoming-modern/symbolism/symbolism-art-nouveau/", "id": "symbolism-art-nouveau", "title": "Symbolism and Art Nouveau", "slug": "symbolism-art-nouveau", "kind": "Exercise"}], "in_knowledge_map": false, "description": "By the 1880s artists such as Klimt, Khnopff, and Stuck turned from the academies and focused on the interior self by exploring dreams, myth and death.", "node_slug": "symbolism", "render_type": "Tutorial", "topic_page_url": "/humanities/becoming-modern/symbolism", "extended_slug": "humanities/becoming-modern/symbolism", "kind": "Topic", "slug": "symbolism"}], "in_knowledge_map": false, "description": "1800-1900: Delacroix, Van Gogh, Klimt, and more.", "node_slug": "becoming-modern", "render_type": "Subject", "topic_page_url": "/humanities/becoming-modern", "extended_slug": "humanities/becoming-modern", "kind": "Topic", "slug": "becoming-modern"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-1010/", "id": "art-1010", "hide": false, "title": "Expressionism to Pop Art", "child_data": [{"kind": "Topic", "id": "x9aee03fc"}, {"kind": "Topic", "id": "x541c2504"}, {"kind": "Topic", "id": "x967b0ee4"}, {"kind": "Topic", "id": "x834bc2e2"}, {"kind": "Topic", "id": "x40379106"}, {"kind": "Topic", "id": "x4f0429b0"}, {"kind": "Topic", "id": "x8af0c4f8"}, {"kind": "Topic", "id": "x2529666a"}, {"kind": "Topic", "id": "xa0dc95b3"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-1010/beginners-guide-20-21/", "id": "beginners-guide-20-21", "hide": false, "title": "A beginner's guide to 20th century art", "child_data": [{"kind": "Video", "id": "1020984445"}, {"kind": "Video", "id": "1032809887"}, {"kind": "Article", "id": "x8b59f8a4"}], "children": [{"path": "khan/humanities/art-1010/beginners-guide-20-21/representation-abstraction-looking-at-millais-and-newman/", "id": "8-5DTsl1V5k", "title": "Representation and abstraction: Millais's Ophelia and Newman's Vir Heroicus Sublimis", "kind": "Video", "description": "Representation & Abstraction: Looking at Millais and Newman\nJohn Everett Millais, Ophelia, 1851-2 (Tate Britain) and Barnett Newman, Vir Heroicus Sublimus, 1950-51 (MoMA)\n\nA conversation with Sal Khan, Beth Harris & Steven Zucker", "slug": "representation-abstraction-looking-at-millais-and-newman"}, {"path": "khan/humanities/art-1010/beginners-guide-20-21/art-context/", "id": "2aUFB9hQncQ", "title": "Art and context: Monet's Cliff Walk at Pourville and Malevich's White on White", "kind": "Video", "description": "Art & Context: Monet's Cliff Walk at Pourville & Malevich's Suprematist Composition: White on White A conversation with Sal Khan, Steven Zucker & Beth Harris", "slug": "art-context"}], "in_knowledge_map": false, "description": "If abstract art puzzles you, this is a great place to start.", "node_slug": "beginners-guide-20-21", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/beginners-guide-20-21", "extended_slug": "humanities/art-1010/beginners-guide-20-21", "kind": "Topic", "slug": "beginners-guide-20-21"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-1010/early-abstraction/", "id": "early-abstraction", "hide": false, "title": "Early abstraction: Fauvism, Expressionism, and Cubism", "child_data": [{"kind": "Topic", "id": "x9aeaea39"}, {"kind": "Topic", "id": "x30f94448"}, {"kind": "Topic", "id": "x98409839"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/", "id": "fauvism-matisse", "hide": false, "title": "Fauvism and Matisse", "child_data": [{"kind": "Article", "id": "xa5578a8e"}, {"kind": "Video", "id": "670111816"}, {"kind": "Article", "id": "xdeea1558"}, {"kind": "Article", "id": "xbd04bc7a"}, {"kind": "Video", "id": "671718106"}, {"kind": "Article", "id": "x1db38bf1"}, {"kind": "Article", "id": "x9fa2a410"}, {"kind": "Video", "id": "xd268a07a"}, {"kind": "Video", "id": "671593310"}, {"kind": "Article", "id": "x9e123025"}, {"kind": "Video", "id": "xca22cd8f"}, {"kind": "Video", "id": "xc71c850f"}, {"kind": "Exercise", "id": "x1c64254f"}], "children": [{"path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/matisse-luxe-calme-et-volupt-1904/", "id": "7d6S8y2kYSg", "title": "Matisse, Luxe, calme et volupt\u00e9", "kind": "Video", "description": "Henri Matisse, Luxe, calme et volupt\u00e9, 1904, oil on canvas, 37 x 46 inches (Muse\u00e9 d'Orsay, Paris)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nPainted while the artist stayed with the pointillist painter, Signac, at his home in Saint-Tropez on the C\u00f4te d'Azur. Matisse's title comes from Charles Baudelaire's\npoem, L'invitation au voyage (Invitation To A Voyage) from his collection, The Flowers of Evil. Luxe, calme et volupt\u00e9 translates just as it sounds in English, Luxury, calm, and voluptuous(ness)", "slug": "matisse-luxe-calme-et-volupt-1904"}, {"path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/henri-matisse-the-red-studio-1911/", "id": "W-huWpNU-9w", "title": "Matisse, The Red Studio", "kind": "Video", "description": "Henri Matisse, The Red Studio, oil on canvas, 1911 (MoMA)", "slug": "henri-matisse-the-red-studio-1911"}, {"path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/matisse-blue-window/", "id": "jCByVqB4iJQ", "title": "Matisse, \"The Blue Window\"", "kind": "Video", "description": "Learn about Matisse\u2019s search for essential form in The Blue Window.\u00a0To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945.", "slug": "matisse-blue-window"}, {"path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/henri-matisse-the-piano-lesson-1916/", "id": "9vI1kP-9zpw", "title": "Matisse, Piano Lesson", "kind": "Video", "description": "Henri Matisse, The Piano Lesson, 1916 (The Museum of Modern Art) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "henri-matisse-the-piano-lesson-1916"}, {"path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/reading-matisse/", "id": "nA5niH5e31Q", "title": "Matisse, The illustrated book, \u201cJazz\u201d", "kind": "Video", "description": "Met curator Rebecca Rabinow on disquiet in Henri Matisse\u2019s The illustrated book, \u201cJazz,\"\u00a01947.\n\nView this work on metmuseum.org", "slug": "reading-matisse"}, {"path": "khan/humanities/art-1010/early-abstraction/fauvism-matisse/conserving-henri-matisses-the-swimming-pool/", "id": "-rke7RmxwfY", "title": "Conserving Henri Matisse's \"The Swimming Pool\"", "kind": "Video", "description": "Explore the process of conserving Matisse's The Swimming Pool, one of the artist's most beloved cut-out masterpieces and a centerpiece of the Henri Matisse: The Cut-Outs exhibition at MoMA.\u00a0Create your own cut-outs and collages and learn about Matisse's life in the online courses Modern Art: 1880-1945 and Experimenting with Collage.", "slug": "conserving-henri-matisses-the-swimming-pool"}], "in_knowledge_map": false, "description": "Les Fauves (the wild beasts) used color the way most artists use line, to define form in space. From these brilliant early experiments, Henri Matisse went on to create some of the most daring and satisfying art of the early 20th century avant-garde.", "node_slug": "fauvism-matisse", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/early-abstraction/fauvism-matisse", "extended_slug": "humanities/art-1010/early-abstraction/fauvism-matisse", "kind": "Topic", "slug": "fauvism-matisse"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-1010/early-abstraction/expressionism1/", "id": "expressionism1", "hide": false, "title": "Expressionism", "child_data": [{"kind": "Video", "id": "671656231"}, {"kind": "Article", "id": "xeb97fcf8"}, {"kind": "Video", "id": "x01250367"}, {"kind": "Video", "id": "x1a0d575a"}, {"kind": "Video", "id": "708153521"}, {"kind": "Video", "id": "708161242"}, {"kind": "Video", "id": "708153522"}, {"kind": "Video", "id": "xd558ad8f"}, {"kind": "Video", "id": "x3cccb7fa"}], "children": [{"path": "khan/humanities/art-1010/early-abstraction/expressionism1/ernst-ludwig-kirchner-street-dresden-1908/", "id": "zfZu--psur8", "title": "Kirchner, Street, Dresden", "kind": "Video", "description": "Ernst Ludwig Kirchner, Street, Dresden, oil on canvas, 1908 (MoMA)\n\nSpeakers: Dr. Juliana Kreinik, Dr. Steven Zucker, Dr. Beth Harris", "slug": "ernst-ludwig-kirchner-street-dresden-1908"}, {"path": "khan/humanities/art-1010/early-abstraction/expressionism1/kirchner-street-berlin/", "id": "HWivDUWFaX0", "title": "Ernst Ludwig Kirchner, \"Street, Berlin\"", "kind": "Video", "description": "Walk the streets of 1913 Berlin with the Expressionist painter Ernst Ludwig Kirchner.\u00a0To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945.", "slug": "kirchner-street-berlin"}, {"path": "khan/humanities/art-1010/early-abstraction/expressionism1/moma-nolde-youngcouple/", "id": "MCL1qhlSq1Y", "title": "Emil Nolde, \"Young Couple,\" 1913", "kind": "Video", "description": "To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945 or Pigment to Pixel: Color in Modern and Contemporary Art.", "slug": "moma-nolde-youngcouple"}, {"path": "khan/humanities/art-1010/early-abstraction/expressionism1/alexej-von-jawlensky-young-girl-in-a-flowered-hat-1910/", "id": "vUxYPrznFLw", "title": "Jawlensky, Young Girl in a Flowered Hat", "kind": "Video", "description": "Alexej von Jawlensky, Young Girl in a Flowered Hat, 1910, oil on cardboard (Albertina, Vienna)", "slug": "alexej-von-jawlensky-young-girl-in-a-flowered-hat-1910"}, {"path": "khan/humanities/art-1010/early-abstraction/expressionism1/egon-schiele-seated-male-nude-self-portrait-1910/", "id": "croM4PvOdbM", "title": "Schiele, Seated Male Nude (Self-Portrait)", "kind": "Video", "description": "Egon Schiele, Seated Male Nude (Self-Portrait), 1910, oil and gouache on canvas, 152.5 \u00d7 150 cm (Leopold Museum, Vienna)", "slug": "egon-schiele-seated-male-nude-self-portrait-1910"}, {"path": "khan/humanities/art-1010/early-abstraction/expressionism1/egon-schiele-hermits-1912/", "id": "PqRx4OV5jhM", "title": "Schiele, Hermits", "kind": "Video", "description": "Egon Schiele, Hermits, 1912, oil on canvas, 71-1/4 x 71-1/4 inches (Leopold Museum, Vienna)", "slug": "egon-schiele-hermits-1912"}, {"path": "khan/humanities/art-1010/early-abstraction/expressionism1/kandinsky-improv28/", "id": "Sa3FyvaKYVw", "title": "Kandinsky, Improvisation 28 (second version), 1912", "kind": "Video", "description": "Vasily Kandinsky, Improvisation 28 (second version), 1912, oil on canvas, 111.4 x 162.1 cm (Solomon R. Guggenheim Museum, New York) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "kandinsky-improv28"}, {"path": "khan/humanities/art-1010/early-abstraction/expressionism1/kandinsky-sounds/", "id": "WdPMdGUeYGk", "title": "Vasily Kandinsky, \"Kl\u00e4nge (Sounds)\"", "kind": "Video", "description": "To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945 or Pigment to Pixel: Color in Modern and Contemporary Art.", "slug": "kandinsky-sounds"}], "in_knowledge_map": false, "description": "Expressionism experiments in Germany were dominated by two groups of artists, Die Br\u00fccke (the Bridge) and Der Blaue Reiter. Here find Ernst Ludwig Kirchner, Emil Nolde, and the Russians, Wassily Kandinsky and Alexei von Jawlensky. Meanwhile in Vienna, Egon Schiele was exploring representations of the body with wild, restless energy.", "node_slug": "expressionism1", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/early-abstraction/expressionism1", "extended_slug": "humanities/art-1010/early-abstraction/expressionism1", "kind": "Topic", "slug": "expressionism1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-1010/early-abstraction/cubism/", "id": "cubism", "hide": false, "title": "Cubism and its impact", "child_data": [{"kind": "Article", "id": "x8e4ff292"}, {"kind": "Article", "id": "x6309c760"}, {"kind": "Article", "id": "xce855fae"}, {"kind": "Video", "id": "671385817"}, {"kind": "Article", "id": "xc545282b"}, {"kind": "Video", "id": "671634401"}, {"kind": "Video", "id": "671593315"}, {"kind": "Article", "id": "x0e484104"}, {"kind": "Exercise", "id": "x29b7bc36"}, {"kind": "Video", "id": "670111817"}, {"kind": "Article", "id": "x2451fa3c"}, {"kind": "Video", "id": "x0cddd7f0"}, {"kind": "Video", "id": "1175994509"}, {"kind": "Video", "id": "x7219d5b5"}, {"kind": "Article", "id": "xe5d96922"}, {"kind": "Video", "id": "xd3466b44"}, {"kind": "Video", "id": "xa5cfd029"}, {"kind": "Exercise", "id": "x21bf1551"}], "children": [{"path": "khan/humanities/art-1010/early-abstraction/cubism/picasso-les-demoiselles-d-avignon-1907/", "id": "fy2TlYnYIzA", "title": "Picasso, Les Demoiselles d'Avignon", "kind": "Video", "description": "Pablo Picasso, Les Demoiselles d'Avignon, 1907 (Museum of Modern Art)", "slug": "picasso-les-demoiselles-d-avignon-1907"}, {"path": "khan/humanities/art-1010/early-abstraction/cubism/braque-le-viaduc-l-estaque-the-viaduct-at-l-estaque-1908/", "id": "j2-95i4pq9g", "title": "Braque, The Viaduct at L'Estaque", "kind": "Video", "description": "Georges Braque, Le Viaduc \u00e0 L'Estaque, (The Viaduct at L'Estaque), 1908, oil on canvas, 28-5/8 x 23-1/4 inches or 72.5 x 59 cm (Mus\u00e9e national d'art moderne, Centre Pompidou, Paris). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "braque-le-viaduc-l-estaque-the-viaduct-at-l-estaque-1908"}, {"path": "khan/humanities/art-1010/early-abstraction/cubism/picasso-the-reservoir-horta-de-ebro-1909/", "id": "IXtreNuEC-Q", "title": "Picasso, The Reservoir, Horta de Ebro", "kind": "Video", "description": "Pablo Picasso, The Reservoir, Horta de Ebro, oil on canvas, summer 1909, 24-1/8 x 20-1/8\" (MoMA, fractional and promised gift)", "slug": "picasso-the-reservoir-horta-de-ebro-1909"}, {"path": "khan/humanities/art-1010/early-abstraction/cubism/braque-s-the-portuguese-quiz/", "id": "braque-s-the-portuguese-quiz", "title": "Braque, The Portuguese (quiz)", "description": "Test your knowledge.", "slug": "braque-s-the-portuguese-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/early-abstraction/cubism/picasso-still-life-with-chair-caning-1912/", "id": "286FiUvOeFs", "title": "Picasso, Still Life with Chair Caning", "kind": "Video", "description": "Picasso, Still-Life with Chair Caning, 1912 (Mus\u00e9e Picasso)", "slug": "picasso-still-life-with-chair-caning-1912"}, {"path": "khan/humanities/art-1010/early-abstraction/cubism/moma-picasso-glassguitarbottle/", "id": "-jXFckR2yoY", "title": "Pablo Picasso, \"Guitar, Glass, and Bottle\"", "kind": "Video", "description": "To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945.", "slug": "moma-picasso-glassguitarbottle"}, {"path": "khan/humanities/art-1010/early-abstraction/cubism/the-language-of-representation-pablo-picasso-s-guitar-1912-14/", "id": "bfy6IxsN_lg", "title": "Picasso, Guitar", "kind": "Video", "description": "A conversation between Salman Khan and Steven Zucker about Pablo Picasso's sculpture, Guitar and related work, 1912-14 at The Museum of Modern Art\n\n\"I have seen what no man has seen before. When Pablo Picasso, leaving aside painting for a moment, was constructing this immense guitar out of sheet metal whose plans could be dispatched to any ignoramus in the universe who could put it together as well as him, I saw Picasso's studio, and this studio, more incredible than Faust's laboratory, this studio which, according to some, contained no works of art, in the old sense, was furnished with the newest of objects... Some witnesses, already shocked by the things that they saw covering the walls, and that they refused to call paintings because they were made of oilcloth, wrapping paper, and newspaper, said, pointing a haughty finger at the object of Picasso's clever pains: \"What is it? Does it rest on a pedestal? Does it hang on a wall? What is it, painting or sculpture?'\u00a0Picasso, dressed in the blue of Parisian artisans, responded in his finest Andalusian voice: 'It's nothing, it's el guitare!';\u00a0And there you are! The watertight compartments are demolished. We are delivered from painting and sculpture, which already have been liberated from the idiotic tyranny of genres. It is neither this nor that. It is nothing. It's el guitare!\" (Andr\u00e9 Salmon, New French Painting, August 9, 1919)", "slug": "the-language-of-representation-pablo-picasso-s-guitar-1912-14"}, {"path": "khan/humanities/art-1010/early-abstraction/cubism/moma-picasso-guitars-1912-1914/", "id": "YwnfVj5qeo4", "title": "Conservation | Picasso's Guitars", "kind": "Video", "description": "Photography helps MoMA conservators determine how to treat Picasso's 1913 Cubist sculpture, Still-Life with Guitar. To learn about how art changes over time, enroll in one of MoMA's courses online.", "slug": "moma-picasso-guitars-1912-1914"}, {"path": "khan/humanities/art-1010/early-abstraction/cubism/moma-contrast-of-forms/", "id": "iKGCnjBi2sQ", "title": "Fernand L\u00e9ger, \"Contrast of Forms\"", "kind": "Video", "description": "To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945 or Pigment to Pixel: Color in Modern and Contemporary Art.", "slug": "moma-contrast-of-forms"}, {"path": "khan/humanities/art-1010/early-abstraction/cubism/moma-simultaneous-contrasts-sun-moon/", "id": "PkzACPGZcVk", "title": "Robert Delaunay, \"Simultaneous Contrasts: Sun and Moon\"", "kind": "Video", "description": "To learn more about how abstract artists became the radical thinkers of their time, take our online course, Modern Art, 1880-1945 or Pigment to Pixel: Color in Modern and Contemporary Art.", "slug": "moma-simultaneous-contrasts-sun-moon"}, {"path": "khan/humanities/art-1010/early-abstraction/cubism/cubism-and-its-impact/", "id": "cubism-and-its-impact", "title": "Cubism and its impact (quiz)", "description": "Test your knowledge!", "slug": "cubism-and-its-impact", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The Spaniard Picasso changed the way we see the world. He could draw with academic perfection at a very young age but he gave it up in order to create a language of representation suited to the modern world. Together with the French artist George Braque, Picasso undertook an analysis of form and vision that would inspire radical new visual forms across Europe and in America. This tutorial explains the underlying principles of Cubism and the abstract experiments that followed including Italian Futurism, Russian Suprematism, and the Dutch movement, de Stijl.", "node_slug": "cubism", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/early-abstraction/cubism", "extended_slug": "humanities/art-1010/early-abstraction/cubism", "kind": "Topic", "slug": "cubism"}], "in_knowledge_map": false, "description": "Matisse, Kandinsky, Picasso all used abstraction to invent new systems of representation.", "node_slug": "early-abstraction", "render_type": "Topic", "topic_page_url": "/humanities/art-1010/early-abstraction", "extended_slug": "humanities/art-1010/early-abstraction", "kind": "Topic", "slug": "early-abstraction"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-1010/wwi-dada/", "id": "wwI-dada", "hide": false, "title": "World War I, Futurism and Dada", "child_data": [{"kind": "Topic", "id": "x740e6234"}, {"kind": "Topic", "id": "xf68d4051"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-1010/wwi-dada/art-great-war/", "id": "art-great-war", "hide": false, "title": "Futurism and the Great War", "child_data": [{"kind": "Article", "id": "xe2128dff"}, {"kind": "Article", "id": "x084160b1"}, {"kind": "Article", "id": "xed9a3310"}, {"kind": "Video", "id": "x9b526c4a"}, {"kind": "Article", "id": "xd50086b1"}, {"kind": "Video", "id": "x14b3e978"}, {"kind": "Article", "id": "xc5bb3187"}, {"kind": "Video", "id": "719804660"}, {"kind": "Video", "id": "x43b302d2"}], "children": [{"path": "khan/humanities/art-1010/wwi-dada/art-great-war/dynamism-soccer-player-boccioni/", "id": "GLEJgVSL0Ac", "title": "Umberto Boccioni, \"Dynamism of a Soccer Player\"", "kind": "Video", "description": "To learn more about how abstract artists became the radical thinkers of their time, take our online course, Modern Art, 1880-1945 or Pigment to Pixel: Color in Modern and Contemporary Art.", "slug": "dynamism-soccer-player-boccioni"}, {"path": "khan/humanities/art-1010/wwi-dada/art-great-war/ludwig-hohlwein/", "id": "BSeQPlYD6S8", "title": "1913 | Schiess-Dusseldorf by Ludwig Hohlwein", "kind": "Video", "description": "Discover how advertising, machinery and U-boats intersect on the eve of WWI. \u00a0To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945.", "slug": "ludwig-hohlwein"}, {"path": "khan/humanities/art-1010/wwi-dada/art-great-war/raymond-duchamp-villon-horse-1914/", "id": "JAe14gwSvIU", "title": "Duchamp-Villon, Horse", "kind": "Video", "description": "Raymond Duchamp-Villon, Horse, 1914, bronze, 39-3/8 x 24 x 36 inches / 99 x 61 x 91.4 cm (Art Institute of Chicago)", "slug": "raymond-duchamp-villon-horse-1914"}, {"path": "khan/humanities/art-1010/wwi-dada/art-great-war/room-1914-1915/", "id": "iCYSKCJNbwM", "title": "Room: 1914 & 1915", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Chris Stephens explores the years 1914 & 1915.\n\nLearn more about the art featured in this video:\n-\u00a0Sir Jacob Epstein, Torso in Metal from \u2018The Rock Drill\u2019, 1913\u201314\n- David Bomberg, The Mud Bath, 1914\n-\u00a0Walter Richard Sickert, Brighton Pierrots, 1915", "slug": "room-1914-1915"}], "in_knowledge_map": false, "description": "Here are several examples that show artists interpreting the rise of the machine immediately before and during WWI.", "node_slug": "art-great-war", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/wwI-dada/art-great-war", "extended_slug": "humanities/art-1010/wwI-dada/art-great-war", "kind": "Topic", "slug": "art-great-war"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-1010/wwi-dada/dada1/", "id": "dada1", "hide": false, "title": "Dada", "child_data": [{"kind": "Video", "id": "1021049728"}, {"kind": "Video", "id": "1233757970"}, {"kind": "Exercise", "id": "xbdd8f04b"}, {"kind": "Video", "id": "x5a724e7d"}, {"kind": "Video", "id": "671593308"}, {"kind": "Video", "id": "669368692"}, {"kind": "Exercise", "id": "x51824268"}], "children": [{"path": "khan/humanities/art-1010/wwi-dada/dada1/duchamp-s-shovel-art-as-concept/", "id": "MRv20I13vqM", "title": "Art as concept: Duchamp, In Advance of the Broken Arm", "kind": "Video", "description": "Marcel Duchamp, In Advance of the Broken Arm, 1964 (fourth version, after lost original of November 1915) (MoMA). A conversation with Sal Khan & Steven Zucker.", "slug": "duchamp-s-shovel-art-as-concept"}, {"path": "khan/humanities/art-1010/wwi-dada/dada1/marcel-duchamp-fountain-1917/", "id": "FmjSUyyc-3M", "title": "Duchamp, Fountain", "kind": "Video", "description": "Marcel Duchamp, Fountain, 1917/1964, porcelain urinal, paint, San Francisco Museum of Modern Art. Speakers:\u00a0\u00a0Dr. Beth Harris and Dr. Steven Zucker", "slug": "marcel-duchamp-fountain-1917"}, {"path": "khan/humanities/art-1010/wwi-dada/dada1/duchamp-s-fountain/", "id": "duchamp-s-fountain", "title": "Duchamp, Fountain", "description": "Test your knowledge!", "slug": "duchamp-s-fountain", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/wwi-dada/dada1/duchamp-3-standard-stoppages/", "id": "ulHnX0DG8_U", "title": "\"3 Standard Stoppages,\" Marcel Duchamp", "kind": "Video", "description": "Learn how Marcel Duchamp reconceived a standard unit of measure.\u00a0To learn about other great moments in modern art, take our online course, Modern Art, 1880-1945.", "slug": "duchamp-3-standard-stoppages"}, {"path": "khan/humanities/art-1010/wwi-dada/dada1/marcel-duchamp-boite-en-valise-the-red-box-series-f-1960/", "id": "yOAlbFVKGfk", "title": "Duchamp, Boite-en-valise (the red box), series F", "kind": "Video", "description": "Marcel Duchamp, Boite-en-valise (the red box), series F, 1960 (Portland Art Museum) Speakers: Bruce Guenther, Dr. Beth Harris", "slug": "marcel-duchamp-boite-en-valise-the-red-box-series-f-1960"}, {"path": "khan/humanities/art-1010/wwi-dada/dada1/hannah-h-ch-cut-with-the-kitchen-knife-1919-20/", "id": "9E1cA3j_xY8", "title": "H\u00f6ch, Cut with the Kitchen Knife Dada Through the Last Weimar Beer-Belly Cultural Epoch of Germany", "kind": "Video", "description": "Hannah H\u00f6ch, Cut with the Kitchen Knife Dada Through the Last Weimar Beer-Belly Cultural Epoch of Germany, collage, mixed media, 1919-1920", "slug": "hannah-h-ch-cut-with-the-kitchen-knife-1919-20"}, {"path": "khan/humanities/art-1010/wwi-dada/dada1/dada-quiz/", "id": "dada--quiz", "title": "Dada (quiz)", "description": "Test your knowledge.", "slug": "dada-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Dada was an anti-art movement that sought to subvert the function of the arts in an increasingly commercial and militaristic society. Dada develops in numerous cities including Zurich, Berlin, Paris, and New York in the context WWI.", "node_slug": "dada1", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/wwI-dada/dada1", "extended_slug": "humanities/art-1010/wwI-dada/dada1", "kind": "Topic", "slug": "dada1"}], "in_knowledge_map": false, "description": "Boccioni and the Futurists responded very differently than did Duchamp and the Dada artists to the violence of the Great War.", "node_slug": "wwI-dada", "render_type": "Topic", "topic_page_url": "/humanities/art-1010/wwI-dada", "extended_slug": "humanities/art-1010/wwI-dada", "kind": "Topic", "slug": "wwi-dada"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-1010/art-between-wars/", "id": "art-between-wars", "hide": false, "title": "Art between the wars: the avant-garde and the rise of totalitarianism", "child_data": [{"kind": "Topic", "id": "x5ec8d2a8"}, {"kind": "Topic", "id": "x04ec35bd"}, {"kind": "Topic", "id": "x18ec4deb"}, {"kind": "Topic", "id": "x6aba341c"}, {"kind": "Topic", "id": "xd3f80362"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/", "id": "neue-sachlichkeit", "hide": false, "title": "German art between the wars", "child_data": [{"kind": "Article", "id": "x842c92d7"}, {"kind": "Video", "id": "671634402"}, {"kind": "Video", "id": "669368695"}, {"kind": "Video", "id": "671718111"}, {"kind": "Video", "id": "1283943191"}, {"kind": "Video", "id": "669368690"}, {"kind": "Video", "id": "669368693"}, {"kind": "Video", "id": "671738050"}, {"kind": "Video", "id": "671593316"}, {"kind": "Video", "id": "1159755291"}, {"kind": "Article", "id": "x55a4e533"}, {"kind": "Exercise", "id": "xa090a76b"}], "children": [{"path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/feininger-cathedral-for-program-of-the-state-bauhaus-in-weimar-woodcut-1919/", "id": "hip59oIFSMQ", "title": "Feininger, Cathedral for the Bauhaus", "kind": "Video", "description": "Lyonel Feininger, Cathedral for Program of the State Bauhaus in Weimar, woodcut, 1919 (MoMA)\n\nSpeakers: Dr. Steven Zucker, Dr. Juliana Kreinik\n\nFor more: http://www.smarthistory.org/feiningers-cathedral.html", "slug": "feininger-cathedral-for-program-of-the-state-bauhaus-in-weimar-woodcut-1919"}, {"path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/paul-klee-twittering-machine-1922/", "id": "M7yd8F3eay4", "title": "Klee, Twittering Machine", "kind": "Video", "description": "Paul Klee, Twittering Machine (Die Zwitscher-Maschine), 1922, 25 1/4 x 19\" watercolor,\nink, and gouache on paper (MoMA)\n\nSpeakers: Dr. Juliana Kreinik and Dr. Steven Zucker", "slug": "paul-klee-twittering-machine-1922"}, {"path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/moholy-nagy-composition-a-xx-1924/", "id": "YeBe-yDGVnU", "title": "Moholy-Nagy, Composition A.XX", "kind": "Video", "description": "L\u00e1szl\u00f3 Moholy-Nagy, Composition A.XX, 1924, oil on canvas, 135.5 x 115cm (Mus\u00e9e national d'art moderne, Centre Georges Pompidou, Paris)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "moholy-nagy-composition-a-xx-1924"}, {"path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/moholy-nagy-climbing-the-mast-1928/", "id": "QlQjCQ5SXco", "title": "Moholy-Nagy, Climbing the Mast", "kind": "Video", "description": "L\u00e1szl\u00f3 Moholy-Nagy, Climbing the Mast, 1928, gelatin silver print, 5.4 x 28 cm or 13 15/16 x 11 inches (Metropolitan Museum of Art)\n\nSpeakers: Dr. Juliana Kreinik and Dr. Vanessa Rocco\n\nView this on Smarthistory.org: http://smarthistory.khanacademy.org/laszlo-moholy-nagy-climbing-the-mast.html", "slug": "moholy-nagy-climbing-the-mast-1928"}, {"path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/umbo-otto-umbehr-the-roving-reporter-1926/", "id": "ukjw0Doy65Q", "title": "Umbo, The Roving Reporter", "kind": "Video", "description": "Umbo (Otto Umbehr), The Roving Reporter, photomontage (rephotographed), 1926\n\nSpeakers: Dr. Juliana Kreinik, Dr. Steven Zucker, Dr. Beth Harris", "slug": "umbo-otto-umbehr-the-roving-reporter-1926"}, {"path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/august-sander-portraits/", "id": "qZ1ofSJBxBU", "title": "Sander, Portraits", "kind": "Video", "description": "Portraits by August Sander discussed:\nPastry Cook, gelatin silver print, 1928\nSecretary at a Radio Station, Cologne, gelatin silver print, c. 1931\nDisabled Man, gelatin silver print, 1926\n\nSpeakers: Dr. Juliana Kreinik, Dr. Beth Harris, Dr. Steven Zucker", "slug": "august-sander-portraits"}, {"path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/dix-portrait-of-sylvia-von-harden-1926/", "id": "sHkZWu9tgpw", "title": "Dix, Portrait of the Journalist Sylvia von Harden", "kind": "Video", "description": "Otto Dix, Portrait of the Journalist Sylvia von Harden, 1926 (Mus\u00e9e National d'Art Moderne, Centre Georges Pompidou, Paris)\n\n\nSpeakers: Dr. Juliana Kreinik, Chad Laird\n\nFor more videos, visit www.smarthistory.org", "slug": "dix-portrait-of-sylvia-von-harden-1926"}, {"path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/christian-schad-self-portrait-1927/", "id": "jEVfDSfO9Gw", "title": "Schad, Self-Portrait", "kind": "Video", "description": "Christian Schad, Self-Portrait, 1927, oil on wood, 29 x 24-3/8 inches, 76 x 62 cm\n(Tate Modern, London)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "christian-schad-self-portrait-1927"}, {"path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/paul-troost-house-of-german-art-1933-37/", "id": "hpY22uSAPAA", "title": "Troost, House of German Art and the Entartete Kunst exhibition", "kind": "Video", "description": "Paul Troost's the House of (German) Art, 1933-37 is discussed in relation to the Great Exhibition of German Art and the Entartete Kunst Exhibitions of 1937 in Munich. The House of German Art now exhibits international contemporary art in direct opposition to the original National Socialist intent.", "slug": "paul-troost-house-of-german-art-1933-37"}, {"path": "khan/humanities/art-1010/art-between-wars/neue-sachlichkeit/german-art-between-the-wars/", "id": "german-art-between-the-wars", "title": "German art between the wars (quiz)", "description": "Test your knowledge!", "slug": "german-art-between-the-wars", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Germany was defeated and exhausted in 1918 at the end of WWI. The equally exhausted victors imposed harsh terms on Germany. It was forced to forfeit its overseas colonial possessions, to cede land to its neighbors, and to pay reparations. As demobilized troops returned, German cities filled with unemployed, often maimed veterans. The Socialists briefly seized power and by the early 1920s hyperinflation further destabilized the nation. Neue Sachlichkeit or the New Objectivity cast a cold sharp eye on Modern Germany\u2019s hypocrisy, aggression, and destitution even as extremists on the political right consolidated power. The National Socialists or Nazi Party won the chancellorship in 1933 and quickly used art and architecture as a means build the myth of a pure German people shaped by the land and unsullied by modern industrial culture. This tutorial looks at the ways that competing political ideologies each used art for its own purposes.", "node_slug": "neue-sachlichkeit", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/art-between-wars/neue-sachlichkeit", "extended_slug": "humanities/art-1010/art-between-wars/neue-sachlichkeit", "kind": "Topic", "slug": "neue-sachlichkeit"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/", "id": "intl-avant-garde", "hide": false, "title": "The international avant-garde", "child_data": [{"kind": "Video", "id": "xf8f04cb4"}, {"kind": "Video", "id": "708138870"}, {"kind": "Video", "id": "x4b8acb29"}, {"kind": "Video", "id": "x56cc9e0e"}, {"kind": "Video", "id": "671738052"}, {"kind": "Video", "id": "x6fdc5935"}, {"kind": "Video", "id": "671593317"}, {"kind": "Video", "id": "671718110"}, {"kind": "Article", "id": "x9c0ec41a"}, {"kind": "Video", "id": "x37af7a99"}, {"kind": "Video", "id": "xf9b4c2fe"}, {"kind": "Exercise", "id": "x6f274b9c"}], "children": [{"path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/moma-dechirico-anxiousjourney/", "id": "NhllG85qiwg", "title": "Giorgio de Chirico, \"The Anxious Journey\"", "kind": "Video", "description": "To learn more about how abstract artists became the radical thinkers of their time, take our online course, Modern Art, 1880-1945 or Pigment to Pixel: Color in Modern and Contemporary Art.", "slug": "moma-dechirico-anxiousjourney"}, {"path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/amedeo-modigliani-young-woman-in-a-shirt-1918/", "id": "3sCB3udmu1Y", "title": "Modigliani, Young Woman in a Shirt", "kind": "Video", "description": "Amedeo Modigliani, Young Woman in a Shirt, 1918, oil on canvas (Albertina, Vienna)", "slug": "amedeo-modigliani-young-woman-in-a-shirt-1918"}, {"path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/btheki/", "id": "r3ttwvNvors", "title": "Constantin Brancusi, The Kiss", "kind": "Video", "description": "Constantin Brancusi, The Kiss, 1916, limestone, 58.4 x 33.7 x 25.4 cm (Philadelphia Museum of Art)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "btheki"}, {"path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/moma-brancusi-pogany/", "id": "T6G0ewxKkCQ", "title": "Constantin Brancusi, \"Mlle Pogany\"", "kind": "Video", "description": "To learn more about how abstract artists became the radical thinkers of their time, take our online course, Modern Art, 1880-1945.", "slug": "moma-brancusi-pogany"}, {"path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/brancusi-bird-in-space-1928/", "id": "xWTzH7RV80g", "title": "Brancusi, Bird in Space", "kind": "Video", "description": "Constantin Brancusi, Bird in Space, bronze, limestone, wood, 1928 (MoMA) Speakers: Dr. Steven Zucker, Dr. Beth Harris", "slug": "brancusi-bird-in-space-1928"}, {"path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/mondrian-composition/", "id": "Pz_ZICqJuc8", "title": "\"Composition in Brown and Gray,\" Piet Mondrian", "kind": "Video", "description": "Discover how Mondrian explored center and periphery in his pioneering abstraction.\u00a0\nTo learn about other great moments in modern art, take our online course, Modern Art, 1880-1945.", "slug": "mondrian-composition"}, {"path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/mondrian-composition-no-ii-with-red-and-blue-1929/", "id": "NpWxl4C0OWU", "title": "Mondrian, Composition No. II, with Red and Blue", "kind": "Video", "description": "Piet Mondrian, Composition No. II, with Red and Blue, oil on canvas, 1929 (original date partly obliterated; mistakenly repainted 1925 by Mondrian). Oil on canvas, 15 7/8 x 12 5/8\" (40.3 x 32.1 cm) (The Museum of Modern Art) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "mondrian-composition-no-ii-with-red-and-blue-1929"}, {"path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/cartier-bresson-behind-the-gare-saint-lazare-paris-1932/", "id": "YxMBp4Ef3ek", "title": "Cartier-Bresson, Behind the Gare St. Lazare", "kind": "Video", "description": "Henri Cartier-Bresson, Behind the Gare Saint-Lazare, Paris, 1932 Speakers: Dr. Shana Gallagher-Lindsay, Dr. Beth Harris", "slug": "cartier-bresson-behind-the-gare-saint-lazare-paris-1932"}, {"path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/room-1930/", "id": "iBge6zxqWv8", "title": "Room: 1930s", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Chris Stephens explores the 1930s.\n\nLearn more about the art featured in this video:\n-\u00a0Leon Underwood, Totem to the Artist,\u00a01925\u201330\n- Christopher Wood, Zebra and Parachute, 1930\n-\u00a0Julian Trevelyan, The Potteries,\u00a01938", "slug": "room-1930"}, {"path": "khan/humanities/art-1010/art-between-wars/intl-avant-garde/room-1940/", "id": "TzSMvEiEuo0", "title": "Room: 1940s", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Chris Stephens explores the 1940s.\n\nLearn more about the art featured in this video:\n-\u00a0Francis Bacon, Three Studies for Figures at the Base of a Crucifixion,\u00a01944\n-\u00a0Sir Jacob Epstein, Jacob and the Angel.\u00a01940\u20131", "slug": "room-1940"}], "in_knowledge_map": false, "description": "This tutorial could be called the \"the School of Paris\" Here find the impact of Cubism and pre-war abstraction in de Chirico's Metaphysical painting, Brancusi's biomorphic sculpture, Mondrian's de Stijl grids and other leading members of the avant-garde.", "node_slug": "intl-avant-garde", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/art-between-wars/intl-avant-garde", "extended_slug": "humanities/art-1010/art-between-wars/intl-avant-garde", "kind": "Topic", "slug": "intl-avant-garde"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-1010/art-between-wars/surrealism1/", "id": "surrealism1", "hide": false, "title": "Surrealism", "child_data": [{"kind": "Article", "id": "x61a8fbe5"}, {"kind": "Article", "id": "xd0a4e62b"}, {"kind": "Video", "id": "671718109"}, {"kind": "Video", "id": "x9f14f629"}, {"kind": "Video", "id": "1226959825"}, {"kind": "Video", "id": "669368694"}, {"kind": "Video", "id": "669368691"}, {"kind": "Article", "id": "xb1a7fac8"}, {"kind": "Exercise", "id": "xcafbb7b5"}, {"kind": "Exercise", "id": "x4c5440c6"}], "children": [{"path": "khan/humanities/art-1010/art-between-wars/surrealism1/magritte-the-treachery-of-images-ceci-n-est-pas-une-pipe-1929/", "id": "w702yvnip_w", "title": "Magritte, The Treachery of Images (Ceci n\u2019est pas une pipe)", "kind": "Video", "description": "Ren\u00e9 Magritte, The Treachery of Images (Ceci n'est pas une pipe), 1929 (LACMA) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "magritte-the-treachery-of-images-ceci-n-est-pas-une-pipe-1929"}, {"path": "khan/humanities/art-1010/art-between-wars/surrealism1/magritte-the-portrait/", "id": "RcPI6Mb9J6k", "title": "Conservation | Ren\u00e9 Magritte, \"The Portrait,\" 1935", "kind": "Video", "description": "For more information please visit http://www.moma.org/magritte", "slug": "magritte-the-portrait"}, {"path": "khan/humanities/art-1010/art-between-wars/surrealism1/salvador-dal-the-persistence-of-memory-1931/", "id": "6mp-fBJNQmU", "title": "Dali, The Persistence of Memory", "kind": "Video", "description": "Salvador Dal\u00ed, The Persistence of Memory, 1931 (The Museum of Modern Art)\n\nSpeakers: Sal Khan & Steven Zucker", "slug": "salvador-dal-the-persistence-of-memory-1931"}, {"path": "khan/humanities/art-1010/art-between-wars/surrealism1/dal-metamorphosis-of-narcissus-1937/", "id": "HUZDPWLTZ0g", "title": "Dali, Metamorphosis of Narcissus", "kind": "Video", "description": "Salvador Dal\u00ed, Metamorphosis of Narcissus, 1937, oil on canvas, 51.1 x 78.1 cm (Tate Modern, London) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\n\u00a0\n\nThe ancient source of this subject is Ovid's Metamorphosis (Book 3, lines 339-507) tells of Narcissus who upon seeing his own image reflected in a pool so falls in love that he could not look away, eventually he vanishes and in his place is a \"sweet flower, gold and white, the white around the gold.\"\n\nDal\u00ed's poem, below, accompanied the painting when it was initially exhibited:\n\nNarcissus,\n\nin his immobility,\n\nabsorbed by his reflection with the digestive slowness of carnivorous plants,\n\nbecomes invisible.\n\nThere remains of him only the hallucinatingly white oval of his head,\n\nhis head again more tender,\n\nhis head, chrysalis of hidden biological designs,\n\nhis head held up by the tips of the water's fingers,\n\nat the tips of the fingers\n\nof the insensate hand,\n\nof the terrible hand,\n\nof the mortal hand\n\nof his own reflection.\n\nWhen that head slits\n\nwhen that head splits\n\nwhen that head bursts,\n\nit will be the flower,\n\nthe new Narcissus,\n\nGala - my Narcissus", "slug": "dal-metamorphosis-of-narcissus-1937"}, {"path": "khan/humanities/art-1010/art-between-wars/surrealism1/giacometti-palace-at-4am-1932/", "id": "3zU90x0OZ0Y", "title": "Giacometti, The Palace at 4am", "kind": "Video", "description": "Alberto Giacometti, Palace at 4am, wood, glass, wire and string, 1932 (MoMA)\n\nSpeakers: Dr. Steven Zucker, Dr. Beth Harris \n\nhttp://www.smarthistory.org/surrealism-giacometti.html", "slug": "giacometti-palace-at-4am-1932"}, {"path": "khan/humanities/art-1010/art-between-wars/surrealism1/oppenheim-s-object-quiz/", "id": "oppenheim-s-object-quiz", "title": "Oppenheim's Object Quiz", "description": "Test your knowledge!", "slug": "oppenheim-s-object-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/art-between-wars/surrealism1/surrealism-quiz/", "id": "surrealism--quiz", "title": "Surrealism (quiz)", "description": "Test your knowledge.", "slug": "surrealism-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Do we too readily accept the concrete rational world before us as all that is real? Could there be more? Could the dream be a doorway to a more primal creative experience no less real than our waking world? Influenced by ideas of psychoanalysis such as the unconscious artists built on the irrational art of Dada to explore the dark world of desire freed from rules created to protect us from inner ourselves.", "node_slug": "surrealism1", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/art-between-wars/surrealism1", "extended_slug": "humanities/art-1010/art-between-wars/surrealism1", "kind": "Topic", "slug": "surrealism1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-1010/art-between-wars/latin-american-modernism1/", "id": "latin-american-modernism1", "hide": false, "title": "Latin American Modernism", "child_data": [{"kind": "Video", "id": "669368697"}, {"kind": "Article", "id": "xb544eca1"}, {"kind": "Exercise", "id": "xa5e8f07a"}, {"kind": "Article", "id": "xa786b2fc"}, {"kind": "Article", "id": "xa2f04d7e"}, {"kind": "Article", "id": "x409d05db"}, {"kind": "Article", "id": "x2291b261"}, {"kind": "Exercise", "id": "xcfb412e9"}, {"kind": "Article", "id": "x075f3560"}, {"kind": "Article", "id": "x9f81f264"}, {"kind": "Exercise", "id": "x860c884f"}, {"kind": "Exercise", "id": "xde07d2a9"}], "children": [{"path": "khan/humanities/art-1010/art-between-wars/latin-american-modernism1/frida-kahlo-frieda-and-diego-rivera-1931/", "id": "n2HWkDrorRg", "title": "Frida Kahlo, Frieda and Diego Rivera", "kind": "Video", "description": "Frida Kahlo, Frieda and Diego Rivera\u200b, 1931, oil on canvas, 39-3/8 x 31 inches or 100.01 x 78.74 cm (San Francisco Museum of Modern Art) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nPainted in San Francisco during the artist's first trip outside of Mexico. She accompanied her husband Diego Rivera who was painting in the United States and would, at the end of the year, be the subject of a retrospecive at The Museum of Modern Art in New York. The banderole carried by the bird above the artist states: Here you see us, me, Frieda Kahlo\u200b, with my beloved husband Diego Rivera, I painted these portraits in the beautiful city of San Francisco, California, for our friend Mr. Albert Bender, and it was the month of April of the year 1931. Note: Kahlo changed her German name, Frieda, to Frida.", "slug": "frida-kahlo-frieda-and-diego-rivera-1931"}, {"path": "khan/humanities/art-1010/art-between-wars/latin-american-modernism1/kahlo-the-two-fridas-quiz/", "id": "kahlo--the-two-fridas-quiz", "title": "Kahlo, The Two Fridas (quiz)", "description": "Test your knowledge.", "slug": "kahlo-the-two-fridas-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/art-between-wars/latin-american-modernism1/dream-of-a-sunday-afternoon-in-alameda-central-park-quiz/", "id": "dream-of-a-sunday-afternoon-in-alameda-central-park-quiz", "title": "Rivera, Dream of a Sunday Afternoon in Alameda Central Park (quiz)", "description": "Test your knowledge.", "slug": "dream-of-a-sunday-afternoon-in-alameda-central-park-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/art-between-wars/latin-american-modernism1/lam-the-jungle-quiz/", "id": "lam--the-jungle-quiz", "title": "Lam, The Jungle (quiz)", "description": "Test your knowledge.", "slug": "lam-the-jungle-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/art-between-wars/latin-american-modernism1/latin-american-modernism/", "id": "latin-american-modernism", "title": "Latin American Modernism (quiz)", "description": "Test your knowledge.", "slug": "latin-american-modernism", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Latin America produced many of the most important modernists of the 20th century. Here were artist who drew on their region's colonial and indigenous past and its political present to create entirely new forms of public and private art.", "node_slug": "latin-american-modernism1", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/art-between-wars/latin-american-modernism1", "extended_slug": "humanities/art-1010/art-between-wars/latin-american-modernism1", "kind": "Topic", "slug": "latin-american-modernism1"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/", "id": "american-art-wwii", "hide": false, "title": "American art to World War II", "child_data": [{"kind": "Article", "id": "x2e8a615e"}, {"kind": "Video", "id": "671738047"}, {"kind": "Article", "id": "x620a044f"}, {"kind": "Article", "id": "x64ef5293"}, {"kind": "Article", "id": "xded7a14b"}, {"kind": "Article", "id": "xd198d3e1"}, {"kind": "Video", "id": "670111818"}, {"kind": "Video", "id": "719611780"}, {"kind": "Video", "id": "xd91ea22f"}, {"kind": "Video", "id": "x22ce4959"}, {"kind": "Video", "id": "x404f636f"}, {"kind": "Video", "id": "x33a3e7fd"}, {"kind": "Video", "id": "719611781"}, {"kind": "Article", "id": "x108380d9"}, {"kind": "Video", "id": "xd56af2fa"}], "children": [{"path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/bellows-pennsylvania-station-c-1907-8/", "id": "CIH3VBBL69k", "title": "Bellows, Pennsylvania Station Excavation", "kind": "Video", "description": "George Bellows, Pennsylvania Station Excavation, oil on canvas, c. 1907-08 (Brooklyn Museum)\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "bellows-pennsylvania-station-c-1907-8"}, {"path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/georgia-o-keeffe-the-lawrence-tree-1929/", "id": "wQq2xOs2BYU", "title": "O'Keeffe, The Lawrence Tree", "kind": "Video", "description": "Georgia O'Keeffe, The Lawrence Tree, 1929, oil on canvas, 31 x 40 inches (Wadsworth Atheneum, Hartford)\n\nPainted in the summer of 1929 while visiting D.H. Lawrence at his Kiowa Ranch during O'Keeffe's first trip to New Mexico, the tree stands in front of the house.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "georgia-o-keeffe-the-lawrence-tree-1929"}, {"path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/grant-wood-american-gothic-1930/", "id": "vk2GvyNmYD0", "title": "Wood, American Gothic", "kind": "Video", "description": "Grant Wood, American Gothic, 1930, oil on beaver board, 78 x 65.3 cm / 30-3/4 x 25-3/4 inches (The Art Institute of Chicago) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "grant-wood-american-gothic-1930"}, {"path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/stare/", "id": "7unYHC6YrMs", "title": "Evans, Subway Passengers, New York City", "kind": "Video", "description": "Met curator Jeff Rosenheim on the art of seeing in Walker Evans\u2019s [Subway Passengers, New York City], 1938.\n\nView this work on\u00a0metmuseum.org.", "slug": "stare"}, {"path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/adams-visualizing/", "id": "n-ZCEXWdIMg", "title": "Ansel Adams: Visualizing a Photograph", "kind": "Video", "description": "Ansel Adams talks about seeing and feeling photography.\u00a0Love art?\u00a0Follow us on Google+", "slug": "adams-visualizing"}, {"path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/lawrence-migration-series/", "id": "ZLC8xRNcJvE", "title": "Jacob Lawrence, The Migration Series (*short version*)", "kind": "Video", "description": "Jacob Lawrence, The Migration Series, 1940-41, 60 panels, tempera on hardboard (even numbers at The Museum of Modern Art, odd numbers at the Phillips Collection) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "lawrence-migration-series"}, {"path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/lawrence-migration-long/", "id": "t4lgvB5cV5E", "title": "Jacob Lawrence, The Migration Series (*long version*)", "kind": "Video", "description": "Jacob Lawrence, The Migration Series, 1940-41, 60 panels, tempera on hardboard (even numbers at The Museum of Modern Art, odd numbers at the Phillips Collection) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "lawrence-migration-long"}, {"path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/edward-hopper-nighthawks-1942/", "id": "j24uh8cZ3wA", "title": "Hopper, Nighthawks", "kind": "Video", "description": "Edward Hopper, Nighthawks, 1942, oil on canvas, 84.1 x 152.4 cm / 33-1/8 x 60 inches (The Art Institut of Chicago) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "edward-hopper-nighthawks-1942"}, {"path": "khan/humanities/art-1010/art-between-wars/american-art-wwii/motion/", "id": "j3OqfduWdhc", "title": "Calder, Mobile", "kind": "Video", "description": "Met curator Marla Prather on motion in Alexander Calder\u2019s Mobile, 1941.\n\nAlexander Calder was born to a family of sculptors. His grandfather, Alexander Milne Calder (1846-1923), studied with Thomas Eakins and is famous for the elaborate sculptural decorations of Philadelphia's City Hall. Calder himself had studied to be an engineer at the Stevens Institute of Technology before attending the Art Students League in New York. Like many aspiring artists of his generation, Calder then spent time in Paris where he was inspired by Joan Mir\u00f3's work and absorbed the playfulness of Dada. Indeed, it was the French artist Marcel Duchamp who christened Calder's hanging sculptures \"mobiles.\" For works such as this one, Calder cut sheet metal into various shapes and assembled these elements in a chain-linked system so that the flat metal pieces move in response to currents of air.\n\nThis particular mobile was included in the 1942 exhibition \"Artists for Victory\" at the Metropolitan where the sculpture committee awarded it a prize and recommended it be added to the collection.\n\nView this work on\u00a0metmuseum.org.", "slug": "motion"}], "in_knowledge_map": false, "description": "This tutorial includes many of the most iconic American images, American Gothic and Nighthawks for example. But also find here photographers that documented American poverty during the depression, the gritty cityscape, and the magic of looking up to a night sky through the canopy of a tree.", "node_slug": "american-art-wwii", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/art-between-wars/american-art-wwii", "extended_slug": "humanities/art-1010/art-between-wars/american-art-wwii", "kind": "Topic", "slug": "american-art-wwii"}], "in_knowledge_map": false, "description": "Utopia and the dream preoccupied artists during the depression and the rise of dictators like Hitler.", "node_slug": "art-between-wars", "render_type": "Topic", "topic_page_url": "/humanities/art-1010/art-between-wars", "extended_slug": "humanities/art-1010/art-between-wars", "kind": "Topic", "slug": "art-between-wars"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-1010/art-post-war-britain/", "id": "art-post-war-britain", "hide": false, "title": "Figuration and abstraction in post-war Britain", "child_data": [{"kind": "Article", "id": "x765f0c32"}, {"kind": "Video", "id": "xc2c14210"}, {"kind": "Video", "id": "x7379ebd3"}, {"kind": "Video", "id": "xb749adba"}, {"kind": "Video", "id": "xe05b3add"}, {"kind": "Video", "id": "xe4589369"}], "children": [{"path": "khan/humanities/art-1010/art-post-war-britain/henry-moore/", "id": "1xioYgUWsHg", "title": "Room: Henry Moore", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nChris Stephens takes a look an iconic character in British art, the artist's relationship to Tate, and the work he crafted for a post-war society.\n\nLearn more about the art featured in this video:\n-\u00a0Henry Moore, Reclining Figure,\u00a01951\n- Henry Moore, Family Group, 1949", "slug": "henry-moore"}, {"path": "khan/humanities/art-1010/art-post-war-britain/barbara-hepworth/", "id": "8PPM8foaH_k", "title": "Barbara Hepworth: Pioneering modern sculpture", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nEnglish sculptor Barbara Hepworth (1903-1975) was one of the most outstanding female artists of the 20th century. Her smooth, massive sculptures invite their audiences to engage with and even touch them, and they stand as icons of the modern movement. But although a figure of international standing, Hepworth never achieved the same degree of recognition in her lifetime as male contemporaries Henry Moore or Ben Nicholson (her husband of nearly 20 years).\nTravel to the coastal English town of St Ives, where Hepworth lived and worked until her death in 1975, where many of her sculptures were created and where they continue to stand in the environment they were intended for. If you could see one, how would you interact with a Hepworth sculpture?\n\nExplore the work and archives of Barbara Hepworth, and learn more about the artist here.", "slug": "barbara-hepworth"}, {"path": "khan/humanities/art-1010/art-post-war-britain/room-1950/", "id": "ifv0KWw4pns", "title": "Room: 1950s", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Chris Stephens explores the 1950s.\n\nLearn more about the art featured in this video:\n-\u00a0Lucian Freud, Girl with a White Dog,\u00a01950\u20131\n-\u00a0Patrick Heron, Azalea Garden: May 1956, 1956", "slug": "room-1950"}, {"path": "khan/humanities/art-1010/art-post-war-britain/don-mccullins-photographs/", "id": "2x8QgGgUTBM", "title": "The Berlin Wall and industrial England: Don McCullin's conflict photography", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nDespite having photographed everything from the Vietnam War to the construction of the Berlin Wall, Don McCullin doesn\u2019t like to be referred to as a war photographer. McCullin has been covering events of global importance since the 1960s by placing himself in the heart of the action armed with nothing but a camera. In this video, he speaks about a series of his photographs in which there are no explicit images of war or violence, but traces of more subtle and insidious instances of conflict, such as the ravaging effect of industrialisation on the English countryside or poverty in major cities. His photographs also illuminate an idea that is central not only to photography, but to art in general: the relationship between text and image. If you had seen any of McCullin's photographs without titles, would you know where they took place, who they depicted, or what message they were intended to convey?\n\nFor McCullin, the camera can reveal the untold truths of a society. It also serves as a tool for healing, allowing the photographer to not only capture an image through its lens but to engage with its subjects in a unique way. Would you agree? Do you think a camera can change the way you see things?", "slug": "don-mccullins-photographs"}, {"path": "khan/humanities/art-1010/art-post-war-britain/room-1960/", "id": "gHlcOCP-Cxg", "title": "Room: 1960s", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Chris Stephens explores the 1960s.\n\nLearn more about the art featured in this video:\n- Sir Anthony Caro, Early One Morning, 1962\n-\u00a0Peter Blake, Portrait of David Hockney in a Hollywood Spanish Interior, 1965\n- Frank Bowling, Mirror, 1966", "slug": "room-1960"}], "in_knowledge_map": false, "description": "In the years of recovery after WWII, British artists explored both abstraction and figural representation as we see with Henry Moore and Anthony Caro.", "node_slug": "art-post-war-britain", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/art-post-war-britain", "extended_slug": "humanities/art-1010/art-post-war-britain", "kind": "Topic", "slug": "art-post-war-britain"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-1010/abstract-exp-nyschool/", "id": "abstract-exp-nyschool", "hide": false, "title": "Abstract Expressionism and the New York School", "child_data": [{"kind": "Topic", "id": "x09678f65"}, {"kind": "Topic", "id": "x1bb15e60"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/", "id": "abstract-expressionism", "hide": false, "title": "Abstract Expressionism", "child_data": [{"kind": "Article", "id": "1361660119"}, {"kind": "Video", "id": "671634398"}, {"kind": "Video", "id": "x5e5044f6"}, {"kind": "Video", "id": "1023621312"}, {"kind": "Video", "id": "671718107"}, {"kind": "Video", "id": "x56b411c6"}, {"kind": "Video", "id": "1023434959"}, {"kind": "Video", "id": "x2fb08e9a"}, {"kind": "Video", "id": "1283799953"}, {"kind": "Video", "id": "xcfef1a5b"}, {"kind": "Article", "id": "x45c999b1"}, {"kind": "Video", "id": "xa59aa75b"}, {"kind": "Video", "id": "1023636462"}, {"kind": "Video", "id": "x62dcc98f"}, {"kind": "Video", "id": "xaab5948f"}, {"kind": "Article", "id": "x8c368030"}, {"kind": "Video", "id": "x840f7734"}, {"kind": "Video", "id": "1023636463"}, {"kind": "Exercise", "id": "xac767de1"}], "children": [{"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/barnett-newman-onement-i-1948/", "id": "4qgOSBHptLM", "title": "Newman's Onement I, 1948", "kind": "Video", "description": "Barnett Newman, Onement I, 1948, oil on canvas ,27 1/4 x 16 1/4\" (69.2 x 41.2 cm), The Museum of Modern Art\n\nSpeakers: Dr. Steven Zucker, Dr. Beth Harris \n\nhttp://smarthistory.org/barnett-newman.html", "slug": "barnett-newman-onement-i-1948"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-barnett-newman/", "id": "wyT4IvTGSwk", "title": "Barnett Newman", "kind": "Video", "description": "Set aside the everyday and enter the profound, even spiritual space of Barnett Newman's paintings. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-barnett-newman"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-painting-technique-newman/", "id": "GacKM9yxiw4", "title": "The Painting Techniques of Barnett Newman", "kind": "Video", "description": "Learn Barnett Newman's techniques and how he reinvented the traditional figure-ground relationship. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-painting-technique-newman"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/mark-rothko-no-3-no-13-1949/", "id": "FnkATpF4O2Q", "title": "Mark Rothko's No. 3/No. 13, 1949", "kind": "Video", "description": "Mark Rothko, No. 3/No. 13, 1949, oil on canvas (MoMA)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "mark-rothko-no-3-no-13-1949"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-mark-rothko/", "id": "JPoQeuWybIo", "title": "Mark Rothko", "kind": "Video", "description": "Explore the power of abstraction through Mark Rothko's luminous and introspective paintings. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-mark-rothko"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-painting-technique-rothko/", "id": "vSiu8qzHV6c", "title": "The Painting Techniques of Mark Rothko", "kind": "Video", "description": "Explore the complex veils of color that form Mark Rothko's abstract paintings. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-painting-technique-rothko"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/restoring-rothko/", "id": "AGqAggmwyMU", "title": "Restoring Rothko", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nWhat happens when a priceless work of art is vandalised? Filmed over 18 months, this video tells the story behind the restoration of Mark Rothko\u2019s 1958 painting Black on Maroon after it was unexpectedly graffitied in October 2012. Since being damaged, the painting has undergone over a year of intensive restoration work by the Conservation team and colleagues across the gallery. Nine months of research on how to remove ink from the delicate and aged layers of paint, using special solvents and cleaning methods, were followed by nine months of painstaking work on the painting itself.\n\nWould the painting ever look the same again? Is it possible to restore a painting without leaving a trace? Find out on this journey through art, science, and conservation.\n\nLearn more about Mark Rothko and his work in the Tate Collection here.", "slug": "restoring-rothko"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/why-is-that-important-looking-at-jackson-pollock/", "id": "NT0SHjOowLA", "title": "Why is that important? Looking at Jackson Pollock", "kind": "Video", "description": "Why is that Important?: Looking at Jackson Pollock\n\nA conversation with Sal Khan, Steven Zucker and Beth Harris", "slug": "why-is-that-important-looking-at-jackson-pollock"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-jackson-pollock/", "id": "oG45EoRh3Fo", "title": "Jackson Pollock", "kind": "Video", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting or enroll in the online course Modern and Contemporary\u00a0Art:\u00a01945-1989.", "slug": "moma-jackson-pollock"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/pollock-paint/", "id": "ECdR_W3Fk4Q", "title": "Paint Application Studies of Jackson Pollock's Mural", "kind": "Video", "description": "Scientists from the Getty Conservation Institute attempt to recreate the method and materials used by Jackson Pollock to create his monumental painting, Mural.\u00a0Love art? Follow us on Google+", "slug": "pollock-paint"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-painting-technique-pollock/", "id": "EncR_T0faKM", "title": "The Painting Techniques of Jackson Pollock", "kind": "Video", "description": "Learn about the drip-style painting techniques of one of America's most iconic and influential painters. To learn more and create your own works, take our online course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-painting-technique-pollock"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-pollock-one-number-31-1950/", "id": "7beFNpp4FxY", "title": "Conservation | Pollock, \"One: Number 31, 1950\"", "kind": "Video", "description": "You can experiment with Pollock's famous painting technique and those of other Abstract Expressionist artists by enrolling in our online course: Materials and Techniques of Postwar Painting.", "slug": "moma-pollock-one-number-31-1950"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/robert-motherwell-elegy-to-the-spanish-republic-no-57-1957-60/", "id": "C89z5GncK88", "title": "Robert Motherwell, Elegy to the Spanish Republic No. 57", "kind": "Video", "description": "Robert Motherwell, Elegy to the Spanish Republic No. 57, 1957-60, oil on canvas, 84 x 109-1/8 inches (San Francisco Museum of Modern Art)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "robert-motherwell-elegy-to-the-spanish-republic-no-57-1957-60"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-franz-kline/", "id": "xyTxrbsfLpg", "title": "Franz Kline", "kind": "Video", "description": "To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting or learn more about the art of this time in the online history course Modern and Contemporary Art: 1945-1989.", "slug": "moma-franz-kline"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/moma-painting-technique-kline/", "id": "1xQTlp0hscs", "title": "The Painting Techniques of Franz Kline", "kind": "Video", "description": "Learn how Franz Kline turned small sketches done on the pages of a phone book into large, gestural abstractions. To experiment on your own, take our online studio course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-painting-technique-kline"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism/abex-quiz/", "id": "abex-quiz", "title": "Abstract Expressionism (quiz)", "description": "Test your knowledge.", "slug": "abex-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Action painting, drip painting, luminous fields of color so large that they envelop the viewer while exposing the process of their creation. Abstract Expressionism is not a single style and isn't even consistently abstract. Rather, it is intensely personal painting often on a very large scale that is more concerned with exposing the act of creative invention than in traditions of representation.", "node_slug": "abstract-expressionism", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/abstract-exp-nyschool/abstract-expressionism", "extended_slug": "humanities/art-1010/abstract-exp-nyschool/abstract-expressionism", "kind": "Topic", "slug": "abstract-expressionism"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/", "id": "ny-school", "hide": false, "title": "New York School", "child_data": [{"kind": "Article", "id": "x0a3325ae"}, {"kind": "Video", "id": "1385500124"}, {"kind": "Video", "id": "x876db2db"}, {"kind": "Article", "id": "x70ddc64f"}, {"kind": "Video", "id": "1390714408"}, {"kind": "Video", "id": "669368699"}, {"kind": "Video", "id": "1397630213"}, {"kind": "Video", "id": "x2afbf1d7"}, {"kind": "Video", "id": "x9d581911"}, {"kind": "Article", "id": "xb036feb0"}, {"kind": "Exercise", "id": "xb98e2177"}, {"kind": "Article", "id": "xe56309b2"}], "children": [{"path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/jasper-johns-flag/", "id": "9bWJt2hjBH0", "title": "Jasper Johns, Flag", "kind": "Video", "description": "A conversation between Salman Khan and Steven Zucker about Jasper Johns, Flag, 1954-55 (dated on reverse 1954), encaustic, oil, and collage on fabric mounted on plywood, three panels, 42-1/4 x 60-5/8 inches /107.3 x 153.8 cm (The Museum of Modern Art)\n\n\"One night I dreamed I painted a large American flag, and the next morning I got up and I went out and bought the materials to begin it. And I did. I worked on that painting a long time. It's a very rotten painting\u2014physically rotten\u2014because I began it in house enamel paint, which you paint furniture with, and it wouldn't dry quickly enough. Then I had in my head this idea of something I had read or heard about: wax encaustic. \"\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 --Jasper Johns", "slug": "jasper-johns-flag"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/below-the-surface/", "id": "VLNxk83TIOU", "title": "Johns, White Flag", "kind": "Video", "description": "Met curator Ian Alteveer on reticence in Jasper Johns\u2019s White Flag, 1955.\n\nBorn in Augusta, Georgia, in 1930 and raised in South Carolina, Jasper Johns moved in 1949 to New York City, where he enrolled in a commercial art school for two semesters. Back in New York, following his service in the army (ca. 1950\u201351), Johns became acquainted with artist Robert Rauschenberg, composer John Cage, and dancer Merce Cunningham. By the mid- to late 1950s Johns had already achieved fame with his paintings of targets, numerals, and American flags, and his work was exhibited in prominent museums and galleries in New York. \"White Flag\" of 1955, recently acquired by the Metropolitan from the artist's own collection, exemplifies Johns's early style, which engendered a wide range of subsequent art movements, among them Pop Art, Minimal Art, and Conceptual Art. During the 1950s and 1960s Johns frequently appropriated well-known images (such as targets, flags, and beer cans), elevating them to cultural icons. Throughout his oeuvre \u2014 which includes painting, prints, drawings, and sculpture \u2014 images are constantly recycled and combined in extensive series. In his later compositions of the 1970s, Johns filled the surface of his pictures with colorful cross-hatchings (suggested by the passing cars on an expressway); and since the 1980s he has incorporated images that have more autobiographical significance.\n\n\"White Flag\" is the largest of his flag paintings and the first in which the flag is presented in monochrome. By draining most of the color from the flag but leaving subtle gradations in tone, the artist shifts our attention from the familiarity of the image to the way in which it is made. \"White Flag\" is painted on three separate panels: the stars, the seven upper stripes to the right of the stars, and the longer stripes below. Johns worked on each panel separately. After applying a ground of unbleached beeswax, he built up the stars, the negative areas around them, and the stripes with applications of collage\u2014cut or torn pieces of newsprint, other papers, and bits of fabric. He dipped these into molten beeswax and adhered them to the surface. He then joined the three panels and overpainted them with more beeswax mixed with pigments, adding touches of white oil.\n\nThe fast-setting medium of encaustic enabled Johns to make each brushstroke distinct, while the forty-eight-star flag design\u2014contiguous with the perimeters of the canvas\u2014 provided a structure for the richly varied surface, which ranges from translucent to opaque.\n\nView this work on metmuseum.org.", "slug": "below-the-surface"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/robert-rauschenberg-bed-1955/", "id": "tvpp2lAD9iY", "title": "Robert Rauschenberg, Bed", "kind": "Video", "description": "Robert Rauschenberg, Bed, 1955, oil and pencil on pillow, quilt, and sheet on wood supports, 191.1 x 80 x 20.3 cm (The Museum of Modern Art) \u00a9 2013 Robert Rauschenberg Foundation\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "robert-rauschenberg-bed-1955"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/ed-kienholz-and-nancy-reddin-kienholz-useful-art-5-the-western-hotel-1992/", "id": "WhGOmAwuQTE", "title": "Ed Kienholz and Nancy Reddin Kienholz Useful Art #5: The Western Hotel, 1992", "kind": "Video", "description": "Ed Kienholz and Nancy Reddin Kienholz, Useful Art #5: The Western Hotel, 1992\n(Portland Art Museum)\n\nSpeakers: Tina Olsen, Bruce Guenther", "slug": "ed-kienholz-and-nancy-reddin-kienholz-useful-art-5-the-western-hotel-1992"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/ad-reinhardt-abstract-painting-1963/", "id": "PywR3Pn7ZlU", "title": "Ad Reinhardt, Abstract Painting", "kind": "Video", "description": "Ad Reinhardt, Abstract Painting, 1963, oil on canvas, 60 x 60 inches (The Museum of Modern Art) Speakers: Salman Khan & Steven Zucker", "slug": "ad-reinhardt-abstract-painting-1963"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/moma-ad-reinhardt/", "id": "p5nej7Gy7kQ", "title": "Ad Reinhardt", "kind": "Video", "description": "Take time with Ad Reinhardt's black canvases and discover the rewards of contemplation. To learn more and create your own works, take our online course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-ad-reinhardt"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/moma-painting-technique-reinhardt/", "id": "jSGGHmTXA3o", "title": "The Painting Techniques of Ad Reinhardt", "kind": "Video", "description": "Take time with Ad Reinhardt's black canvases and discover the rewards of contemplation. To learn more and create your own works, take our online course Materials and Techniques of Postwar Abstract Painting.", "slug": "moma-painting-technique-reinhardt"}, {"path": "khan/humanities/art-1010/abstract-exp-nyschool/ny-school/frankenthaler-s-the-bay-quiz/", "id": "frankenthaler-s-the-bay-quiz", "title": "Frankenthaler's The Bay (quiz)", "description": "Test your knowledge.", "slug": "frankenthaler-s-the-bay-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The term New York School usually refers to both the younger Abstract Expressionists sometimes also known as 2nd generation Abstract Expressionists and artists directly influenced by this movement. The includes both the color field paintings championed by the critic Clement Greenberg who sought to advance formal aspects of AbEx and artists like Jasper Johns and Robert Rauschenberg who looked at the heroic nature of Abstract Expressionism with both irony and respect.", "node_slug": "ny-school", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/abstract-exp-nyschool/ny-school", "extended_slug": "humanities/art-1010/abstract-exp-nyschool/ny-school", "kind": "Topic", "slug": "ny-school"}], "in_knowledge_map": false, "description": "After WWII, Pollock, de Kooning, Rothko and other abstract artists reinvented painting.", "node_slug": "abstract-exp-nyschool", "render_type": "Topic", "topic_page_url": "/humanities/art-1010/abstract-exp-nyschool", "extended_slug": "humanities/art-1010/abstract-exp-nyschool", "kind": "Topic", "slug": "abstract-exp-nyschool"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-1010/pop/", "id": "pop", "hide": false, "title": "Pop", "child_data": [{"kind": "Article", "id": "xbe70145c"}, {"kind": "Article", "id": "x795b1b14"}, {"kind": "Video", "id": "1014910268"}, {"kind": "Video", "id": "671385821"}, {"kind": "Article", "id": "xb9f62fa8"}, {"kind": "Video", "id": "671656235"}, {"kind": "Article", "id": "xa8289a49"}, {"kind": "Video", "id": "x629a04ea"}, {"kind": "Video", "id": "671738057"}, {"kind": "Exercise", "id": "x80cb13ce"}], "children": [{"path": "khan/humanities/art-1010/pop/andy-warhol-campbell-s-soup-cans-why-is-this-art/", "id": "SdbOrNLcC0I", "title": "Why is this art? Andy Warhol, Campbell's Soup Cans", "kind": "Video", "description": "Steven Zucker and Sal Khan discuss Andy Warhol's Campbell's Soup Cans", "slug": "andy-warhol-campbell-s-soup-cans-why-is-this-art"}, {"path": "khan/humanities/art-1010/pop/warhol-gold-marilyn-monroe-1962/", "id": "lXfzq27fGvU", "title": "Warhol, Gold Marilyn Monroe", "kind": "Video", "description": "Andy Warhol, Gold Marilyn Monroe, Silkscreen ink, Silkscreen ink on synthetic polymer paint on canvas, 71.25 x 57 in. (211.4 x 144.7 cm), 1962 (MoMA)", "slug": "warhol-gold-marilyn-monroe-1962"}, {"path": "khan/humanities/art-1010/pop/oldenburg-floor-cake-1962/", "id": "N-mt2tiRJ7U", "title": "Oldenburg, Floor Cake", "kind": "Video", "description": "Claes Oldenburg, Floor Cake, 1962, synthetic polymer paint and latex on canvas filled with foam rubber and cardboard boxes, 58.375 x 114.25 x 58.375 in. (148.2 x 290.2 x 148.2 cm) (MoMA) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "oldenburg-floor-cake-1962"}, {"path": "khan/humanities/art-1010/pop/moma-rosenquist-f111/", "id": "txHg9ItLH3Y", "title": "James Rosenquist, \"F-111,\" 1964-65", "kind": "Video", "description": "\u200bJames Rosenquist said about his 1964 painting, F111, \"a multiplicity of ideas caused its existence.\" To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "slug": "moma-rosenquist-f111"}, {"path": "khan/humanities/art-1010/pop/lichtenstein-rouen-cathedral-set-v-1969/", "id": "GpwAsXrBJ-Q", "title": "Lichtenstein, Rouen Cathedral Set V", "kind": "Video", "description": "Roy Lichtenstein, Rouen Cathedral Set V, 1969, oil and magna on canvas, 3 canvases: 63-5/8 x 141-7/8 x 1-3/4 inches or 161.61 x 360.36 x 4.45 cm (SFMOMA). Speakers: Dr,. Beth Harris and Dr. Steven Zucker", "slug": "lichtenstein-rouen-cathedral-set-v-1969"}, {"path": "khan/humanities/art-1010/pop/pop-and-after/", "id": "pop-and-after", "title": "Pop and after (quiz)", "description": "Test your knowledge!", "slug": "pop-and-after", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Wham! Warhol, Lichtenstein and Oldenburg crashed the gates of high culture asking what authentic art looks like in a society filled with tawdry commercial images.", "node_slug": "pop", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/pop", "extended_slug": "humanities/art-1010/pop", "kind": "Topic", "slug": "pop"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-1010/minimalism-earthworks/", "id": "minimalism-earthworks", "hide": false, "title": "Minimalism and Earthworks", "child_data": [{"kind": "Article", "id": "xb45fea36"}, {"kind": "Video", "id": "671656237"}, {"kind": "Video", "id": "671385822"}, {"kind": "Article", "id": "x425c0076"}, {"kind": "Video", "id": "xd302b696"}, {"kind": "Article", "id": "x309a7bfc"}, {"kind": "Exercise", "id": "xa836f4bd"}, {"kind": "Video", "id": "x4ff11b89"}, {"kind": "Article", "id": "xe6c5fcd2"}, {"kind": "Video", "id": "x75d1ad6c"}, {"kind": "Video", "id": "xde0a5d87"}, {"kind": "Video", "id": "x42ab23e9"}, {"kind": "Video", "id": "x255f97b9"}, {"kind": "Exercise", "id": "x8752ab7d"}, {"kind": "Article", "id": "x55dc6545"}, {"kind": "Exercise", "id": "x2dbe915c"}, {"kind": "Exercise", "id": "x1ff53f7e"}], "children": [{"path": "khan/humanities/art-1010/minimalism-earthworks/donald-judd-untitled-1969/", "id": "G37C5vKCwH4", "title": "Donald Judd, Untitled", "kind": "Video", "description": "Donald Judd, Untitled\u00a0, 1969, ten copper units, each 9 x 40 x 31 inches with 9 inch intervals (Guggenheim Museum, New York).Speakers: Dr. Shana Gallagher-Lindsay, Dr. Beth Harris", "slug": "donald-judd-untitled-1969"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/smithson-spiral-jetty-1970/", "id": "NUu0_Zn55yM", "title": "Smithson, Spiral Jetty", "kind": "Video", "description": "Robert Smithson, Spiral Jetty, 1970 (Great Salt Lake, Utah) Speakers: Dr. Beth Harris and Dr. Shana Gallagher-Lindsay http://www.smarthistory.org/earth-artsmithsons-spiral-jetty.html", "slug": "smithson-spiral-jetty-1970"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/robert-morris-bodyspacemotionthings/", "id": "IeUiL5vzSzA", "title": "Robert Morris: Bodyspacemotionthings at Tate Modern", "kind": "Video", "description": "This video brought to you by Tate.org.uk\n\nParticipatory art was a new concept when the exhibition Bodyspacemotionthings first went on show at the Tate in 1971. Created by the American artist Robert Morris, it consists of a series of beams, weights, platforms, rollers, tunnels and ramps that people can clamber all over. It closed just four days after opening, due to safety concerns over the wildly enthusiastic reaction of the audience. Take a look at this 2009 recreation of the piece and listen as curators Catherine Wood and Kathy Noble talk about Morris's vision of art and participation.", "slug": "robert-morris-bodyspacemotionthings"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/spiral-jetty-quiz/", "id": "spiral-jetty-quiz", "title": "Smithson, Spiral Jetty (quiz)", "description": "Test your knowledge.", "slug": "spiral-jetty-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/rockburne-drawing/", "id": "AN2DJxMLFOw", "title": "Dorothea Rockburne: Drawing Which Makes Itself", "kind": "Video", "description": "Contemporary artist Dorothea Rockburne talks about mathematics, magic, and materials. To learn about how art changes over time, enroll in one of MoMA's courses online.", "slug": "rockburne-drawing"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/moma-serra-intersection-ii/", "id": "C_OmWlMjsxQ", "title": "Richard Serra, \"Intersection II\"", "kind": "Video", "description": "Richard Serra talks about how this sculpture made of 4 identical plates, allows us to explore 3 very different spaces. To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "slug": "moma-serra-intersection-ii"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/moma-serra-torqued-ellipse-iv/", "id": "ilWo7eWY73M", "title": "Richard Serra, \"Torqued Ellipse IV\"", "kind": "Video", "description": "Richard Serra talks about discovering \"the potential for what steel could be.\" To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "slug": "moma-serra-torqued-ellipse-iv"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/moma-serra-band/", "id": "GAQ9KyxDYUY", "title": "Richard Serra, \"Band,\" 2006", "kind": "Video", "description": "Richard Serra on his sculpture, Band: \"you can walk inside and outside continuously and never stop\u201d for more than 70 feet. Learn more about what artists have to say in our online course, Modern and Contemporary Art, 1945-1989.", "slug": "moma-serra-band"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/mayalin-vietnamvetmem/", "id": "wuxjTxxQUTs", "title": "Maya Lin, Vietnam Veterans Memorial", "kind": "Video", "description": "Maya Lin, Vietnam Veterans Memorial, 1982, granite, 2 acres\u00a0within\u00a0Constitution Gardens, (National Mall, Washington, D.C.),\u00a0speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "mayalin-vietnamvetmem"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/vietnam-veterans-memorial-quiz/", "id": "vietnam-veterans-memorial-quiz", "title": "Lin, Vietnam Veterans Memorial (quiz)", "description": "Test your knowledge.", "slug": "vietnam-veterans-memorial-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/the-gates-quiz/", "id": "the-gates-quiz", "title": "Christo and Jeanne-Claude, The Gates (quiz)", "description": "Test your knowledge.", "slug": "the-gates-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/minimalism-earthworks/minimalism-and-the-land/", "id": "minimalism-and-the-land", "title": "Minimalism and Earthworks (quiz)", "description": "Test your knowledge.", "slug": "minimalism-and-the-land", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Minimalism isn\u2019t simple, although Judd, Smithson, Christo and others did use simple forms to convey complex issues about the nature of art.", "node_slug": "minimalism-earthworks", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/minimalism-earthworks", "extended_slug": "humanities/art-1010/minimalism-earthworks", "kind": "Topic", "slug": "minimalism-earthworks"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-1010/architecture-20c/", "id": "architecture-20c", "hide": false, "title": "Architecture and design", "child_data": [{"kind": "Article", "id": "x2833b4ad"}, {"kind": "Article", "id": "x36119ed2"}, {"kind": "Article", "id": "x1bad98ae"}, {"kind": "Article", "id": "xa1a37764"}, {"kind": "Article", "id": "xd1761ba2"}, {"kind": "Exercise", "id": "x488f660c"}, {"kind": "Article", "id": "x09327c81"}, {"kind": "Video", "id": "x3102f1db"}, {"kind": "Video", "id": "671656233"}, {"kind": "Video", "id": "671738049"}, {"kind": "Video", "id": "671738053"}, {"kind": "Exercise", "id": "x43e95443"}, {"kind": "Exercise", "id": "x3feb6523"}, {"kind": "Article", "id": "x385f0c10"}], "children": [{"path": "khan/humanities/art-1010/architecture-20c/wright-s-fallingwater-quiz/", "id": "wright-s-fallingwater-quiz", "title": "Wright, Fallingwater (quiz)", "description": "Test your knowledge.", "slug": "wright-s-fallingwater-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/architecture-20c/glass-chair/", "id": "a8g6ma0MBaA", "title": "Glass Chair at the 1939 New York World's Fair", "kind": "Video", "description": "Chair; ca. 1948; Attributed to Henry Turchin, \u00a0design direction by Louis Dierra (American, active c. 1939); Manufactured by the Pittsburgh Plate Glass Company, \u00a0slumped plate glass, metal, woven textile; Museum purchase through gift of George R. Kravis II and from General Acquisitions Endowment Fund; 2013-1-1, Cooper Hewitt, Smithsonian Design Museum Speakers: Emily Orr, Assistant Curator of Modern and Contemporary American Design, Cooper Hewitt, Smithsonian Design Museum and Dr. Steven Zucker, Smarthistory", "slug": "glass-chair"}, {"path": "khan/humanities/art-1010/architecture-20c/frank-lloyd-wright-solomon-r-guggenheim-museum-new-york-city-1942-1959/", "id": "JVm-ePTIKR4", "title": "Frank Lloyd Wright, Solomon R. Guggenheim Museum", "kind": "Video", "description": "Frank Lloyd Wright, Solomon R. Guggenheim Museum, New York City, 1942-1959. Speakers: Dr. Matthew Postal and Dr. Steven Zucker", "slug": "frank-lloyd-wright-solomon-r-guggenheim-museum-new-york-city-1942-1959"}, {"path": "khan/humanities/art-1010/architecture-20c/gordon-bunshaft-for-skidmore-owings-and-merrill-lever-house-1951-52/", "id": "ujYRgDi3Lz8", "title": "Gordon Bunshaft, Lever House", "kind": "Video", "description": "Gordon Bunshaft for Skidmore Owings and Merrill, Lever House, 1951-52 (390 Park Avenue, NYC) Speakers: Dr. Matthew A. Postal and Dr. Steven Zucker", "slug": "gordon-bunshaft-for-skidmore-owings-and-merrill-lever-house-1951-52"}, {"path": "khan/humanities/art-1010/architecture-20c/mies-van-der-rohe-seagram-building-new-york-city-1958/", "id": "ZyyuflY5k2k", "title": "Mies van der Rohe, Seagram Building", "kind": "Video", "description": "Ludwig Mies van der Rohe, Seagram Building, 375 Park Avenue, New York City (1958) Speakers: Dr. Matthew Postal, Dr. Steven Zucker. Note: In the video we call Le Corbusier a French architect, but he was born in Swizerland and became a French citizen in 1930.", "slug": "mies-van-der-rohe-seagram-building-new-york-city-1958"}, {"path": "khan/humanities/art-1010/architecture-20c/seagram-building-quiz/", "id": "seagram-building-quiz", "title": "Mies van der Rohe, Seagram Building (quiz)", "description": "Test your knowledge.", "slug": "seagram-building-quiz", "kind": "Exercise"}, {"path": "khan/humanities/art-1010/architecture-20c/international-style-architecture/", "id": "international-style-architecture", "title": "International Style architecture (quiz)", "description": "Test your knowledge!", "slug": "international-style-architecture", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What about architecture? F.L. Wright\u2019s Guggenheim and Mies\u2019 Seagram Building each drew on classical precedents to create beauty in the modern city.", "node_slug": "architecture-20c", "render_type": "Tutorial", "topic_page_url": "/humanities/art-1010/architecture-20c", "extended_slug": "humanities/art-1010/architecture-20c", "kind": "Topic", "slug": "architecture-20c"}], "in_knowledge_map": false, "description": "1900-1970: Kollwitz, Picasso, Warhol, and more.", "node_slug": "art-1010", "render_type": "Subject", "topic_page_url": "/humanities/art-1010", "extended_slug": "humanities/art-1010", "kind": "Topic", "slug": "art-1010"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/global-culture/", "id": "global-culture", "hide": false, "title": "Toward a global culture", "child_data": [{"kind": "Topic", "id": "x6149e5bf"}, {"kind": "Topic", "id": "x209da924"}, {"kind": "Topic", "id": "xe38a033d"}, {"kind": "Topic", "id": "xec717cd7"}, {"kind": "Topic", "id": "xaae4b580"}, {"kind": "Topic", "id": "x184ced41"}, {"kind": "Topic", "id": "x30d84dd0"}, {"kind": "Topic", "id": "x161337da"}, {"kind": "Topic", "id": "xebacd435"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/global-culture/beginners-guide-contemporary-art1/", "id": "beginners-guide-contemporary-art1", "hide": false, "title": "A beginner's guide to contemporary art", "child_data": [{"kind": "Article", "id": "x62398992"}, {"kind": "Video", "id": "1020926923"}, {"kind": "Article", "id": "xc5d02627"}, {"kind": "Article", "id": "x807d435a"}, {"kind": "Article", "id": "x51f3ec40"}, {"kind": "Article", "id": "x62371024"}], "children": [{"path": "khan/humanities/global-culture/beginners-guide-contemporary-art1/hirst-s-shark-interpreting-contemporary-art/", "id": "uDuzy-t7GDA", "title": "Damien Hirst, The Physical Impossibility of Death in the Mind of Someone Living", "kind": "Video", "description": "Beth Harris, Sal Khan and Steven Zucker discuss the Damien Hirst sculpture, The Physical Impossibility of Death in the Mind of Someone Living, and issues of interpretation.", "slug": "hirst-s-shark-interpreting-contemporary-art"}], "in_knowledge_map": false, "description": "", "node_slug": "beginners-guide-contemporary-art1", "render_type": "Tutorial", "topic_page_url": "/humanities/global-culture/beginners-guide-contemporary-art1", "extended_slug": "humanities/global-culture/beginners-guide-contemporary-art1", "kind": "Topic", "slug": "beginners-guide-contemporary-art1"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/global-culture/identity-body/", "id": "identity-body", "hide": false, "title": "Identity, the body and the subversion of Modernism", "child_data": [{"kind": "Topic", "id": "xa89b47ab"}, {"kind": "Topic", "id": "x59f1c8c7"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/global-culture/identity-body/identity-body-united-states/", "id": "identity-body-united-states", "hide": false, "title": "United States", "child_data": [{"kind": "Article", "id": "xf278f4df"}, {"kind": "Video", "id": "669368700"}, {"kind": "Video", "id": "671656236"}, {"kind": "Article", "id": "x5c0eae85"}, {"kind": "Video", "id": "671634407"}, {"kind": "Article", "id": "xd2717b85"}, {"kind": "Video", "id": "671634404"}, {"kind": "Video", "id": "x4ff11b89"}, {"kind": "Article", "id": "xf81c26c5"}, {"kind": "Article", "id": "xedfe5fc6"}, {"kind": "Video", "id": "671718113"}, {"kind": "Article", "id": "x6725d02e"}, {"kind": "Article", "id": "xaa064a82"}, {"kind": "Video", "id": "x9e109595"}, {"kind": "Article", "id": "x59249327"}, {"kind": "Video", "id": "1159673415"}, {"kind": "Article", "id": "xffa1232e"}, {"kind": "Article", "id": "x4173aafa"}, {"kind": "Video", "id": "xe1a3df59"}, {"kind": "Video", "id": "xa9a62375"}, {"kind": "Article", "id": "xc16438dd"}, {"kind": "Article", "id": "xbeb51f01"}, {"kind": "Article", "id": "x21d17fa2"}, {"kind": "Article", "id": "x9e3f0e96"}, {"kind": "Exercise", "id": "x68a931d8"}, {"kind": "Exercise", "id": "x5c97a01d"}], "children": [{"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/hesse-untitled-1966/", "id": "jO1wp-Bx-WE", "title": "Hesse, Untitled", "kind": "Video", "description": "Eva Hesse, Untitled, enamel paint, string, papier-m\u00e2ch\u00e9, elastic cord, 1966 (MoMA) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "hesse-untitled-1966"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/hesse-untitled-rope-piece-1970/", "id": "-nrSCokEUXg", "title": "Hesse, Untitled (Rope Piece)", "kind": "Video", "description": "Eva Hesse, Untitled (Rope Piece), 1970, rope, latex, string, wire, variable dimensions (Whitney Museum of American Art) Speakers: Dr. Beth Harris and Dr. Steven Zucker For more: http://smarthistory.org/untitled-rope-piece.html", "slug": "hesse-untitled-rope-piece-1970"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/lynda-benglis-omega-1973/", "id": "_dLpDljQWis", "title": "Chicago, Pasadena Lifesaver, Blue Series, No. 4 & Benglis, Omega", "kind": "Video", "description": "Lynda Benglis, Omega, 1973 (Portland Art Museum) Judy Chicago, Pasadena Lifesaver, Blue Series, Number 4, 1969-70 (Portland Art Museum) Speakers: Bruce Guenther, Dr. Beth Harris For more: http://smarthistory.org/judy-chicagos-pasadena-lifesaver-4-and-lynda-bengliss-omega.html", "slug": "lynda-benglis-omega-1973"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/jackie-winsor-1-rope-1976/", "id": "Mn4D4eQxeMU", "title": "Winsor, #1 Rope", "kind": "Video", "description": "Jackie Winsor, #1 Rope, 1976, wood and hemp, 40-1/4 x 40 x 40 inches (SFMOMA, San Francisco) http://smarthistory.org/jackie-winsors-1-rope.html", "slug": "jackie-winsor-1-rope-1976"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/rockburne-drawing/", "id": "AN2DJxMLFOw", "title": "Dorothea Rockburne: Drawing Which Makes Itself", "kind": "Video", "description": "Contemporary artist Dorothea Rockburne talks about mathematics, magic, and materials. To learn about how art changes over time, enroll in one of MoMA's courses online.", "slug": "rockburne-drawing"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/cindy-sherman-untitled-film-still-21-1978/", "id": "0fPwsLeH8fA", "title": "Sherman, Untitled Film Still #21", "kind": "Video", "description": "Cindy Sherman, Untitled Film Still #21, 1978, gelatin silver print, 7.5 x 9.5 inches or 19.1 x 24.1 cm (MoMA) Speakers: Dr. Shana Gallagher-Lindsay, Dr. Beth Harris", "slug": "cindy-sherman-untitled-film-still-21-1978"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/nan-goldin/", "id": "r_rVyt-ojpY", "title": "Nan Goldin's snapshots of innocence and childhood", "kind": "Video", "description": "This video brought to you by Tate.org.uk\n\nNan Goldin began taking photographs as a teenager in Boston, Massachusetts. Her earliest works, black-and-white images of drag queens, were celebrations of the subcultural lifestyle of the community to which she belonged and which she continued to document throughout the 1990s. During this period Goldin also began making images of friends who were dying of AIDS and recorded her experiences of travelling. Her latest work is an intimate investigation into the narrative of childhood, from birth to young adulthood and everything in between.\nGoldin\u2019s photographs can be tender and shocking at the same time. What do you think she is trying to say about the human condition in her work?\n\nRead more about Nan Goldin and explore her work in the Tate Collection here.", "slug": "nan-goldin"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/sherrie-levine-untitled-after-edward-weston/", "id": "9IZhzUDSBTY", "title": "Sherrie Levine, Untitled (After Edward Weston, ca. 1925)", "kind": "Video", "description": "Sherrie Levine, Untitled (After Edward Weston, ca. 1925), Type C color print, 19.5 x 14.625 in. (49.2 x 36.89 cm), 1981 Speakers: Dr. Shana Gallagher-Lindsay, Dr. Beth Harris", "slug": "sherrie-levine-untitled-after-edward-weston"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/weems-from-here-i-saw-what-happened/", "id": "l2VrAsu0KeE", "title": "Carrie Mae Weems on her series \"From Here I Saw What Happened and I Cried\"", "kind": "Video", "description": "Combining text and photography, contemporary artist Carrie Mae Weems explores the notion of a narrative within her work. Love art? Follow us on Google+", "slug": "weems-from-here-i-saw-what-happened"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/lorna-simpson/", "id": "dNk098ffjLM", "title": "Art and identity in the work of Lorna Simpson", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nEverything from old sports photographs to hair commercials provide inspiration for American artist Lorna Simpson.\u00a0She uses combinations of\u00a0image and text to examine the processes through which meaning and understanding take place. References from popular culture, music, sports, entertainment, and the art world all find their way into her pieces, often speaking of her experience as a black woman artist. In this video, Simpson shows us how she arrived at this methodology and why the things that surround here are so important to her work.\nWhat kind of influence does identity have on an artist? In what ways do you think her gender, race, social class, or sexual orientation would have an effect on her work?", "slug": "lorna-simpson"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/walker-darkytown-rebellion-quiz/", "id": "walker--darkytown-rebellion--quiz", "title": "Walker, Darkytown Rebellion (quiz)", "description": "Test your knowledge.", "slug": "walker-darkytown-rebellion-quiz", "kind": "Exercise"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-united-states/us-identity-the-body-quiz/", "id": "us-identity--the-body-quiz", "title": "US: Identity, the body and the subversion of Modernism (quiz)", "description": "Test your knowledge.", "slug": "us-identity-the-body-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Here is a broad range of art from the United States including the Process art of Hesse, Benglis, and Windsor, the appropriation of Sherman, Colescott, and Levine and Carrie Mae Weems' confrontation with the brutality of slavery and racism.", "node_slug": "identity-body-united-states", "render_type": "Tutorial", "topic_page_url": "/humanities/global-culture/identity-body/identity-body-united-states", "extended_slug": "humanities/global-culture/identity-body/identity-body-united-states", "kind": "Topic", "slug": "identity-body-united-states"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/global-culture/identity-body/identity-body-europe/", "id": "identity-body-europe", "hide": false, "title": "Asia, Africa, Europe, Latin America and the Middle East", "child_data": [{"kind": "Article", "id": "x22b9e2b9"}, {"kind": "Video", "id": "x81916770"}, {"kind": "Video", "id": "xca338c11"}, {"kind": "Article", "id": "x4ea7bd9e"}, {"kind": "Article", "id": "x2995a6d2"}, {"kind": "Video", "id": "1383485038"}, {"kind": "Video", "id": "671634403"}, {"kind": "Video", "id": "956911846"}, {"kind": "Article", "id": "x64490a50"}, {"kind": "Article", "id": "xbc629eb6"}, {"kind": "Article", "id": "x4c13a977"}, {"kind": "Article", "id": "xf9620834"}, {"kind": "Video", "id": "671718112"}, {"kind": "Article", "id": "x2438338a"}, {"kind": "Article", "id": "x3614510f"}, {"kind": "Video", "id": "670111819"}, {"kind": "Video", "id": "xf8fbce90"}, {"kind": "Article", "id": "xb9e7a97b"}, {"kind": "Video", "id": "x3c70ec48"}, {"kind": "Video", "id": "x2e85afeb"}, {"kind": "Video", "id": "xb9292b99"}, {"kind": "Video", "id": "x686cf571"}, {"kind": "Article", "id": "x6db98225"}, {"kind": "Video", "id": "x36c9988c"}, {"kind": "Article", "id": "x2bcc6730"}, {"kind": "Article", "id": "xf1d3bab4"}, {"kind": "Article", "id": "x13924614"}, {"kind": "Video", "id": "x380e5cd1"}, {"kind": "Exercise", "id": "x4c9a5c5e"}], "children": [{"path": "khan/humanities/global-culture/identity-body/identity-body-europe/saloua-raouda-choucair/", "id": "bB1K4H0vx0g", "title": "Saloua Raouda Choucair: From Beirut to Tate Modern", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nLebanese artist Saloua Raouda Choucair is famous in the Middle East for bringing abstraction to the region. A rare female voice in the Beirut art scene from the 1940s onwards, she has spent her career combining Western abstraction with the traditions of Islamic design. But working through civil war and ongoing unrest in Lebanon, she remains virtually unknown outside her own country. At the age of 97, this pioneer of art was belatedly recognised with her first major museum show. Here we travel to Beirut to meet the artist's daughter at the apartment where Choucair's work started its journey.", "slug": "saloua-raouda-choucair"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/el-salahi/", "id": "yenSUBmGrdU", "title": "Ibrahim El-Salahi", "kind": "Video", "description": "This video brought to you by Tate.org.uk\n\nA major figure in Arab and African modernism, artist Ibrahim El-Salahi discusses his work Reborn Sounds of Childhood Dreams I\u00a0(1962-3), a large-scale oil painting at Tate. In 2013, Tate Modern presented the UK's first major exhibition of El-Salahi's work, bringing together 100 pieces from across more than five decades of his international career. Take a look at some highlights from one of the most significant figures in African art and learn more about how he belongs to a broader, global art history as well.", "slug": "el-salahi"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/richter-betty/", "id": "4GW-PORTvfo", "title": "Gerhard Richter, Betty", "kind": "Video", "description": "Salman Khan and Steven Zucker discuss Gerhard Richter's Betty, 1988, oil on canvas, 102 x 72 cm. (Saint Louis Art Museum)", "slug": "richter-betty"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/robert-storr-gerhard-richter-the-cage-paintings/", "id": "aOeKj-w-3fY", "title": "Gerhard Richter, The Cage Paintings (1-6)", "kind": "Video", "description": "Robert Storr talks about Gerhard Richter's Cage paintings.", "slug": "robert-storr-gerhard-richter-the-cage-paintings"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/robert-storr-gerhard-richter-september-2009/", "id": "_s_-J1DFXnQ", "title": "Gerhard Richter, September", "kind": "Video", "description": "Robert Storr talks about Gerhard Richter's painting \"September\". http://www.gerhard-richter.com/art/search/detail.php?13954 F\u00fcr deutsche Untertitel bitte cc anklicken.", "slug": "robert-storr-gerhard-richter-september-2009"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/francis-bacon-triptych-august-1972-1972/", "id": "JZRY6Eco7BM", "title": "Bacon, Triptych - August 1972", "kind": "Video", "description": "Francis Bacon, Triptych - August 1972, 1972, oil on canvas, 72 x 61 x 22 in. (183 x 155 x 64 cm), (Tate Modern, London)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker\n\nFor more: http://smarthistory.org/francis-bacon-triptych-august-1972.html", "slug": "francis-bacon-triptych-august-1972-1972"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/lucian-freud-standing-by-the-rags-1988-89/", "id": "Nb6EQUS8hDo", "title": "Freud, Standing by the Rags", "kind": "Video", "description": "Lucian Freud, Standing by the Rags, 1988-89, oil on canvas, 66.5 x 54.5 in. (168.9 x 138.4 cm), (Tate Britain, London) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "lucian-freud-standing-by-the-rags-1988-89"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/yayoi-kusama/", "id": "rRZR3nsiIeA", "title": "Yayoi Kusama", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nThe nine decades of Yayoi Kusama's life have taken her from rural Japan to the New York art scene to contemporary Tokyo, in a career in which she has continuously innovated and re-invented her style. Learn more about how the artist strove to establish herself both in and beyond Japan, and how she harnessed those struggles to forge a remarkable artistic legacy.", "slug": "yayoi-kusama"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/fiona-rae/", "id": "4gwbyfERDrA", "title": "Fiona Rae on paint and passion", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nYBA (Young British Artist) Fiona Rae\u2019s paintings are clever, lively, and full of restless energy. Her abstract canvases are an exuberant collision of painting styles: encrusted surfaces, brushy swathes and watery pools, along with kitsch cartoon elements, which somehow coalesce despite their differences. Similarly exuberant is Rae\u2019s method of painting, using an eight-foot-long palette, an array of vivid colours, and a cart full of brushes she uses to craft her canvases.\nMany years into her artistic career,\u00a0Rae admits she is still amazed by the possibilities of painting, and her passion for paint is evident in the way she speaks about it. Do you think that passion for a particular material can change the way an artist uses it?\n\nRead more about Fiona Rae and explore her work in the Tate Collection here.", "slug": "fiona-rae"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/graciela-iturbide/", "id": "CyDtzMQbDfQ", "title": "Graciela Iturbide", "kind": "Video", "description": "This video brought to you by Tate.org.uk\n\nWhether capturing images of Frida Kahlo's house, wild dogs in India, or the Seri people in Mexico's Sonoran desert, Mexican photographer Graciela Iturbide presents the world in black in white, or as she describes it, as \"an abstraction of the mind.\" Travelling with her camera every day and often living with her subjects for months, Iturbide says that her process is similar to that of a travel photographer, except that she only shoots \"what surprises and provokes an emotion that I want to capture.\"", "slug": "graciela-iturbide"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/dia-al-azzawi/", "id": "f8LDv2kthzw", "title": "Dia Al-Azzawi", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nHaving moved to the UK in 1976, artist Dia\u00a0Al-Azzawi found that by viewing Iraq from afar, he could understand more about Iraqi and Arabic culture than if he had remained there. Al-Azzawi's vast drawing Sabra and Shatila Massacre 1982-3\u00a0is an example of work that arose from this process of\u00a0observation. Here\u00a0Al-Azzawi explains how working from imagination, he depicted the painting's scenes of chaos\u00a0in a semi-abstract style to create a work that is not a propaganda piece, but which documents a\u00a0tragedy.", "slug": "dia-al-azzawi"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/room-1970-1980/", "id": "EC4wJhOEUz8", "title": "Room: 1970s & 1980s", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Helen Little explores the 1970s & 1980s.\n\nLearn more about the art featured in this video:\n-\u00a0Tony Cragg, Stack, 1975\n- Mark Wallinger, Where There's Muck, 1985", "slug": "room-1970-1980"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/room-1990/", "id": "SadSIPGOeIE", "title": "Room: 1990s", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nCurator Helen Little explores the 1990s.\n\nLearn more about the art featured in this video:\n-\u00a0Leon Kossoff, Christ Church, Spitalfields, Morning, 1990\n-\u00a0Keith Coventry, East Street Estate, 1994\n- Chris Ofili, No Woman, No Cry, 1998", "slug": "room-1990"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/conserving-chris-ofili/", "id": "2T6-eVRui1I", "title": "Conserving Chris Ofili", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nTate\u2019s Conservation Department works hard behind the scenes to ensure that future generations can enjoy the paintings, sculptures, and other works in the collection. But it\u2019s not just the old masters that get their attention\u2013because contemporary artists work in a diverse and sometimes unusual range of materials, the team often undertakes extensive research to help them and see how their works will hold up in the future. Join paintings conservator Natasha Walker as she explains how the team goes about conserving Chris Ofili\u2019s paintings by creating replicas of his works and subjecting them to drops, falls, cracks, and accelerated aging processes. With the help of the artist, his assistants, and even an elephant, the team\u2019s \u201cChris Ofilis\u201d might not be as good as the real thing, but they will help protect the originals well into the future.", "slug": "conserving-chris-ofili"}, {"path": "khan/humanities/global-culture/identity-body/identity-body-europe/europe-identity-body-quiz/", "id": "europe-identity-body-quiz", "title": "Identity, the body and the subversion of Modernism (quiz)", "description": "Test your knowledge.", "slug": "europe-identity-body-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Meanwhile, European artists were also busy exploring issues of identity and the body. Gerhard Richter for example rejected the way artists branded by a particular style and creates a spectrum of work from the hyper realist to the purely abstract. In Britain, Bacon, Freud and Ofili find new power in representations of the human body far removed for the classical tradition.", "node_slug": "identity-body-europe", "render_type": "Tutorial", "topic_page_url": "/humanities/global-culture/identity-body/identity-body-europe", "extended_slug": "humanities/global-culture/identity-body/identity-body-europe", "kind": "Topic", "slug": "identity-body-europe"}], "in_knowledge_map": false, "description": "Artists deconstruct social identity and examine the body as a cultural subject.", "node_slug": "identity-body", "render_type": "Topic", "topic_page_url": "/humanities/global-culture/identity-body", "extended_slug": "humanities/global-culture/identity-body", "kind": "Topic", "slug": "identity-body"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/global-culture/conceptual-performance/", "id": "conceptual-performance", "hide": false, "title": "Conceptual and Performance art", "child_data": [{"kind": "Article", "id": "xe9567ce6"}, {"kind": "Video", "id": "x0e1c4eaa"}, {"kind": "Article", "id": "x0d78f6c6"}, {"kind": "Article", "id": "xd4dc3b83"}, {"kind": "Article", "id": "x5c863854"}, {"kind": "Video", "id": "671593320"}, {"kind": "Article", "id": "x974f76d2"}, {"kind": "Video", "id": "xbcd3d2a0"}, {"kind": "Article", "id": "x47fce848"}, {"kind": "Video", "id": "x789d006a"}, {"kind": "Video", "id": "x8ff17f28"}, {"kind": "Video", "id": "xf80770b9"}, {"kind": "Video", "id": "x89e33d8c"}, {"kind": "Video", "id": "1064586560"}, {"kind": "Video", "id": "x4365cd34"}, {"kind": "Video", "id": "x26f5f629"}, {"kind": "Exercise", "id": "xa4ba64ca"}, {"kind": "Video", "id": "xd3cb75d9"}, {"kind": "Article", "id": "x671572f8"}, {"kind": "Article", "id": "x80062651"}, {"kind": "Video", "id": "x0e6b03f7"}, {"kind": "Video", "id": "x2c8e53d6"}, {"kind": "Video", "id": "xa0482a0d"}], "children": [{"path": "khan/humanities/global-culture/conceptual-performance/unlock-art-frank-skinner-on-performance-art/", "id": "CAz6a5FwZJQ", "title": "Unlock Art: Frank Skinner on Performance Art", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nArtist Joseph Beuys argued that every human activity counts as art so long as it is a conscious act. What do you think? In this video, comedian and art enthusiast Frank Skinner takes us on a journey through performance art and its origins, from movements like Dada and Surrealism through to challenging oppressive regimes and making a social critique.", "slug": "unlock-art-frank-skinner-on-performance-art"}, {"path": "khan/humanities/global-culture/conceptual-performance/beuys-table-with-accumulator-tisch-mit-aggregat-1958-85/", "id": "4QwfrTNuwE4", "title": "Joseph Beuys, Table with Accumulator", "kind": "Video", "description": "Joseph Beuys, Table with Accumulator (Tisch mit Aggregat), 1958-85, Tate Modern, London. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "beuys-table-with-accumulator-tisch-mit-aggregat-1958-85"}, {"path": "khan/humanities/global-culture/conceptual-performance/baldessari-i-will-not-make-any-more-boring-art/", "id": "gO49s8WlUis", "title": "John Baldessari, I Will Not Make Any More Boring Art", "kind": "Video", "description": "John Baldessari, I Will Not Make Any More Boring Art, 1971, lithograph, 22-7/16 x 30-1/16 inches (The Museum of Modern Art), images \u00a9 John Baldessari, courtesy of the artist Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "baldessari-i-will-not-make-any-more-boring-art"}, {"path": "khan/humanities/global-culture/conceptual-performance/jannis-kounellis/", "id": "beU3xkhwgs4", "title": "Jannis Kounellis, \"Da inventare sul posto (To invent on the spot)\"", "kind": "Video", "description": "Watch Jannis Kounellis combine painting music and dance.\u00a0To learn more about what artists have to say, take our online course,\u00a0Modern and Contemporary Art, 1945-1989.", "slug": "jannis-kounellis"}, {"path": "khan/humanities/global-culture/conceptual-performance/tateshots-vito-acconci/", "id": "j_dqT-XeIjA", "title": "Vito Acconci", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nPioneer of performance art Vito Acconci talks about three ground-breaking actions he staged at the Sonnabend Gallery, New York in January 1972. In Seedbed, Transference Zone, and Supply Room, the artist explores the interplay between the psychological and the social, and the overlapping boundaries of interior and exterior. Listen as Acconci, who still lives and works in New York, shares his thoughts on these three performances.", "slug": "tateshots-vito-acconci"}, {"path": "khan/humanities/global-culture/conceptual-performance/the-tanks-juan-downey/", "id": "Aa4RIyDatO8", "title": "Juan Downey: Plato Now", "kind": "Video", "description": "This video brought to you by Tate.org.uk\n\nJuan Downey (1940-1993) was a Chilean artist whose innovations in video, sculpture and interactive performance encouraged reflection on perception and the self. Drawing together advances in technology with an interest in the rituals of his native Latin America, Downey asks big questions about society, history, information and the environment. In this video, his groundbreaking 1973 performance Plato Now is restaged and invites the audience members to consider their role in the piece.", "slug": "the-tanks-juan-downey"}, {"path": "khan/humanities/global-culture/conceptual-performance/hans-haacke/", "id": "oKRly5xc0_g", "title": "Hans Haacke: \"A Breed Apart\" in South Africa", "kind": "Video", "description": "This video brought to you by Tate.org.uk\n\nSince the early 1960s, German-American artist Hans Haacke has been producing controversial work, often seeking to expose systems of power and influence. While some artists might work to engage with local concerns, Haacke brings his art and its topics to a global scale. In this video, he explains his 1978 photographic series A Breed Apart, a group of montages which targets former car manufacturer British Leyland and for its insidious campaigns and actions in apartheid\u2014or racially segregated\u2014South Africa. By juxtaposing slick advertising shots with images of Leyland vehicles \u201cin action,\u201d as he puts it, against the black indigenous population of South Africa, Haacke highlighted the incongruities of the company\u2019s stance.\n\n\n\n\n\n\u201cI believe it is necessary for the public... the voters... to become aware of these interdependencies, and come up with, hopefully, an alternative,\u201d says Haacke. Do you think art and artists have a responsibility to inform and activate the public?\n\nLearn more about Hans Haacke and his politically engaged works of art here.", "slug": "hans-haacke"}, {"path": "khan/humanities/global-culture/conceptual-performance/institutional-critique-hans-haacke-s-seurat-s-les-poseuses-small-version-1884-1975-1975/", "id": "sdM6aGhKdTI", "title": "Hans Haacke, Seurat's 'Les Poseuses' (small version)", "kind": "Video", "description": "Beth Harris, Sal Khan and Steven Zucker discuss art and institutional critique in relation to Hans Haacke's Seurat's 'Les Poseuses' (small version), 1884-1975 from 1975.", "slug": "institutional-critique-hans-haacke-s-seurat-s-les-poseuses-small-version-1884-1975-1975"}, {"path": "khan/humanities/global-culture/conceptual-performance/cildo-meireles/", "id": "yNz3ybrEe3I", "title": "Cildo Meireles", "kind": "Video", "description": "This video brought to you by Tate.org.uk\n\nBrazilian artist Cildo Meireles joins us at Tate Modern for the artist's first UK retrospective. His work is characterised by a high degree of interactivity, as well as recurring motifs of barriers, fencing and mesh. For a special event at the gallery, Meireles invited members of the public to help create the latest version of his work Meshes of Freedom. Listen as he shares his thoughts on the significance of the work, and why art is not just for the eyes.", "slug": "cildo-meireles"}, {"path": "khan/humanities/global-culture/conceptual-performance/xubing-book/", "id": "DseIYQdjzgE", "title": "Xu Bing, Book from the Sky", "kind": "Video", "description": "Xu Bing, Book from the Sky, c. 1987-91, hand-printed books and ceiling and wall scrolls printed from wood letterpress type; ink on paper, each book, open: 18 1/8 \u00d7 20 inches / 46 \u00d7 51 cm; each of three ceiling scrolls 38 inches \u00d7 c. 114 feet 9-7/8 inches / 96.5 \u00d7 3500 cm; each wall scroll 9 feet 2-1/4 inches \u00d7 39-3/8 inches / 280 \u00d7 100 cm (installation at the Metropolitan Museum of Art, 2014), collection of the artist, \u00a9 Xu Bing\nSpeakers: Allison Young and Steven Zucker", "slug": "xubing-book"}, {"path": "khan/humanities/global-culture/conceptual-performance/xu-bing-book-from-the-sky-quiz/", "id": "xu-bing--book-from-the-sky-quiz", "title": "Xu Bing, Book from the Sky (quiz)", "description": "Test your knowledge.", "slug": "xu-bing-book-from-the-sky-quiz", "kind": "Exercise"}, {"path": "khan/humanities/global-culture/conceptual-performance/xu-bing/", "id": "lD7BHl5W86Q", "title": "An installation by Xu Bing at the British Museum", "kind": "Video", "description": "Discover the secrets behind this shadow-and-light box installation by contemporary artist Xu Bing, inspired by a Chinese painting in the Museum's collection. Xu Bing's installation at the British Museum is 5 meters tall and is made using materials such as hemp fibers, dry plants, corn husks, crumpled paper and debris sourced from sites across London.\u00a0\u00a9 Trustees of the British Museum", "slug": "xu-bing"}, {"path": "khan/humanities/global-culture/conceptual-performance/moma-abramovic-live/", "id": "2GD5PBK_Bto", "title": "Marina Abramovi\u0107", "kind": "Video", "description": "Can performance art be re-performed? How can it be collected by the museum? To explore what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "slug": "moma-abramovic-live"}, {"path": "khan/humanities/global-culture/conceptual-performance/moma-abramovic-what-is-performance-art/", "id": "FcyYynulogY", "title": "Marina Abramovi\u0107: What is performance art?", "kind": "Video", "description": "Marina Abramovi\u0107 talks about the difference between theatre and performance art, \"performance is real.\" To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "slug": "moma-abramovic-what-is-performance-art"}, {"path": "khan/humanities/global-culture/conceptual-performance/moma-abramovic-body-as-a-medium/", "id": "OUrwdqwzqMU", "title": "Marina Abramovi\u0107: The Body as medium", "kind": "Video", "description": "Marina Abramovi\u0107 talks about how she shifted from painting to performance art. To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "slug": "moma-abramovic-body-as-a-medium"}], "in_knowledge_map": false, "description": "Does art need to be a physical thing, an object made of stone or canvas? Could art be an idea enacted, a process, or an environment inhabited and transformed?", "node_slug": "conceptual-performance", "render_type": "Tutorial", "topic_page_url": "/humanities/global-culture/conceptual-performance", "extended_slug": "humanities/global-culture/conceptual-performance", "kind": "Topic", "slug": "conceptual-performance"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/global-culture/global-art-architecture/", "id": "global-art-architecture", "hide": false, "title": "Global modernisms in the 21st century", "child_data": [{"kind": "Article", "id": "x5b52dac5"}, {"kind": "Article", "id": "xda1b2b95"}, {"kind": "Article", "id": "x867a0c31"}, {"kind": "Video", "id": "x0568490b"}, {"kind": "Article", "id": "x9b46a4d8"}, {"kind": "Exercise", "id": "x6c0ebc5d"}, {"kind": "Article", "id": "xce910c92"}, {"kind": "Video", "id": "x1b0eee64"}, {"kind": "Article", "id": "xdd69df3d"}, {"kind": "Exercise", "id": "x570a562a"}, {"kind": "Exercise", "id": "x466875a2"}, {"kind": "Article", "id": "x5cf8dd86"}, {"kind": "Video", "id": "xbac5f316"}, {"kind": "Video", "id": "xc6001dfe"}, {"kind": "Article", "id": "x29a01587"}, {"kind": "Article", "id": "x90b8bc45"}, {"kind": "Video", "id": "x4ff79b24"}, {"kind": "Article", "id": "x489bbdd2"}, {"kind": "Video", "id": "x6b2394e5"}, {"kind": "Video", "id": "x8c069795"}, {"kind": "Exercise", "id": "x3192d8e4"}, {"kind": "Video", "id": "xf8cabd80"}, {"kind": "Exercise", "id": "x08d2c817"}, {"kind": "Video", "id": "x6c41d32a"}, {"kind": "Video", "id": "x0d31b36e"}, {"kind": "Video", "id": "xda037b79"}, {"kind": "Article", "id": "xda1ed7d3"}, {"kind": "Article", "id": "x381a8b5b"}, {"kind": "Video", "id": "x50190afe"}, {"kind": "Video", "id": "xaaa5fe7d"}, {"kind": "Video", "id": "x07ef6158"}, {"kind": "Video", "id": "x1a9bb492"}, {"kind": "Video", "id": "x321416de"}, {"kind": "Video", "id": "xc91ee09e"}, {"kind": "Video", "id": "x8fc8b4c4"}], "children": [{"path": "khan/humanities/global-culture/global-art-architecture/shirazeh-houshiary/", "id": "GwTehaUOkhg", "title": "Shirazeh Houshiary", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nBorn in Iran, Shirazeh Houshiary has lived and worked in England since 1973, consistently drawing on modern sensibilities as well as Islamic traditions, particularly Sufi mysticism. Here she discusses works like Veil\u00a0(1999), returning to themes of light and darkness, visual perception and judgement, explaining: \"I'm trying to explore how we see the world.\"", "slug": "shirazeh-houshiary"}, {"path": "khan/humanities/global-culture/global-art-architecture/shonibare-the-swing-quiz/", "id": "shonibare--the-swing-quiz", "title": "Shonibare, The Swing Quiz", "description": "Test your knowledge.", "slug": "shonibare-the-swing-quiz", "kind": "Exercise"}, {"path": "khan/humanities/global-culture/global-art-architecture/mona-hatoum/", "id": "Xs3DzydSKu8", "title": "Mona Hatoum's self-contradictory objects", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nPalestinian, London-based artist Mona Hatoum creates art that challenging our perceptions of everyday objects. \"Often my work is about conflict and contradiction, and that contradiction can be within the actual object,\" she explains. One of her sculptures is a simple wheelchair, an unremarkable object apart from the fact that its handles have been replaced with knives. Another is a baby\u2019s cot, but one with the bottom taken out and replaced with taut, menacing wires. Sometimes the materials she works with are unexpected, like the soap she used to draw a map of a peace agreement between Israel and Palestine.\nThere are many internal contradictions at work in Hatoum\u2019s art. What purpose do they serve? Do they get you thinking about commonplace objects in uncommon ways?\n\nClick here to learn more about Mona Hatoum and her work.", "slug": "mona-hatoum"}, {"path": "khan/humanities/global-culture/global-art-architecture/el-anatsui-quiz/", "id": "el-anatsui-quiz", "title": "El Anatsui, Old Man's Cloth (quiz)", "description": "Test your knowledge.", "slug": "el-anatsui-quiz", "kind": "Exercise"}, {"path": "khan/humanities/global-culture/global-art-architecture/mehretu-stadia-ii-quiz/", "id": "mehretu--stadia-ii-quiz", "title": "Mehretu, Stadia II (quiz)", "description": "Test your knowledge.", "slug": "mehretu-stadia-ii-quiz", "kind": "Exercise"}, {"path": "khan/humanities/global-culture/global-art-architecture/doris-salcedo/", "id": "NIJDn2MAn9I", "title": "Doris Salcedo's \"Shibboleth\"", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\n\"Every work of art is political because every work of art is breaking new ground,\" says Colombian artist Doris Salcedo. In this video, Salcedo explains why she decided to literally break new ground in Tate Modern\u2019s Turbine Hall by splitting the floor open with a long snaking crack in her piece Shibboleth. The word \u201cshibboleth\u201d refers to a word or custom that can be used to differentiate one group from another, and is therefore a token of power: the power to judge and reject with violence.\n\nWhat might it mean to refer to such violence in an art museum? For Salcedo, the crack represents a history of racism, running parallel to the history of modernity. As Salcedo comes from a country riven by war, she has always seen conflict and the world from the perspective of the oppressed. The piece is not an attack, but rather a reminder, a question mark and a disruption of the status quo: she invites us to look down into it, and to confront discomforting truths about our world.\n\nIf you could create some kind of artistic distruption, what would it be? Would it be in a gallery, or on the street? Would it be confrontational or subtle?\n\nTo learn more about Doris Salcedo,\u00a0Shibboleth, and other thought-provoking sculptures by the artist, click here.", "slug": "doris-salcedo"}, {"path": "khan/humanities/global-culture/global-art-architecture/zarina-hashmi/", "id": "jXJpbpvcMDU", "title": "Zarina Hashmi", "kind": "Video", "description": "This video brought to you by Tate.org.uk\n\nZarina Hashmi left India in 1958. Around the same time, her family were subject to relocation from Delhi to Karachi following the partition of India and Pakistan. As a result, exile and the loss of the family home are embedded in her work, which often evokes physical and psychological spaces relating to memories of childhood and later life. Hear the artist speak about her piece Letters from Home\u00a0(2004), a set of woodcuts in which handwritten letters from her sister Rani are overlaid by maps and floorplans that represent the artist's travels and places where she has lived, exploring the relationship with her native language and origins.", "slug": "zarina-hashmi"}, {"path": "khan/humanities/global-culture/global-art-architecture/mark-ruwedel/", "id": "AbecBgtWehE", "title": "Traces of illegal migration in Mexico: Mark Ruwedel", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nIn photographer Mark Ruwedel\u2019s Crossing (2005), we come across a landscape littered with strange and incongruous objects: inner tubes, water bottles, passports, and single shoes are scattered across the desert that stretches over the border between Mexico and Southern California. While we don\u2019t see the players in the drama Ruwedel has documented, his photographs reveal the traces they have left behind, both banal and poignant, as the attempt to cross an invisible line in the desert while escaping detection. Ruwedel walked miles along the US-Mexico border and photographed every object he came across in order to tell the story of undocumented migrants attempting to cross the border in secret.\n\nAs Ruwedel puts it, his photographs deal with \u201cforensic evidence as it is embedded in a landscape that speaks of human histories.\" What purpose do you think Ruwedel\u2019s photographs serve? Are they merely documenting evidence, or telling more complex stories?", "slug": "mark-ruwedel"}, {"path": "khan/humanities/global-culture/global-art-architecture/shai-kremer/", "id": "44ZkTayk2hk", "title": "Shai Kremer in an Israeli military training stage", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nIsraeli photographer and former solider Shai Kremer invites us into an expansive military training ground. Kremer snuck into an Israeli training compound\u2014or \u201cstage\u201d\u2014for urban military manoeuvres and took photographs of the exercises taking place within. Hiding from an hourly patrol, Kremer secretly took photos of this fake city in hopes of raising discussion about what he see as the militarisation of society. Although it seems empty from afar, looking more closely at Kremer\u2019s photograph reveals even more details.\nWhat message do you think Kremer is trying to convey in this photograph? Is he supportive or against what he sees\u2014or neither?", "slug": "shai-kremer"}, {"path": "khan/humanities/global-culture/global-art-architecture/gabriel-orozco/", "id": "LwF9nTEB84k", "title": "Gabriel Orozco", "kind": "Video", "description": "This video brought to you by Tate.org.uk\n\nCreative, playful and inventive, Gabriel Orozco creates art in the streets, his apartment or wherever he is inspired. Born in Mexico but working across the globe, Orozco is renowned for his endless experimentation with found objects, which he subtly alters. Join him as he shares his work, throws a boomerang, and marvels at what art can do.", "slug": "gabriel-orozco"}, {"path": "khan/humanities/global-culture/global-art-architecture/doris-salcedo-shibbo/", "id": "doris-salcedo--shibbo", "title": "Doris Salcedo, Shibboleth (quiz)", "description": "Test your knowledge.", "slug": "doris-salcedo-shibbo", "kind": "Exercise"}, {"path": "khan/humanities/global-culture/global-art-architecture/hadid-maxxi/", "id": "Kv3feYibIUk", "title": "Zaha Hadid, MAXXI National Museum of XXI Century Arts, Rome", "kind": "Video", "description": "Zaha Hadid, MAXXI National Museum of XXI Century Arts,\u00a01998 -- 2009 (opened 2010), Via Guido Reni, Rome.\u00a0A conversation between Dr. Beth Harris and Dr. Steven Zucker", "slug": "hadid-maxxi"}, {"path": "khan/humanities/global-culture/global-art-architecture/zaha-hadid-maxii-national-museum-quiz/", "id": "zaha-hadid--maxii-national-museum-quiz", "title": "Zaha Hadid, MAXII National Museum (quiz)", "description": "Test your knowledge.", "slug": "zaha-hadid-maxii-national-museum-quiz", "kind": "Exercise"}, {"path": "khan/humanities/global-culture/global-art-architecture/east-west-divan/", "id": "GzTr-OnMI-E", "title": "East-West Divan at the Venice Biennale", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nThe Venice Biennale art fair is home to a number of national exhibitions as well as smaller shows, often representing people and places that wouldn't normally get a look in. Former Tate curator Jemima Montagu presents an exhibition of work by artists from Iran, Afghanistan, and Pakistan. She talks about the thriving visual culture of the region and misconceptions surrounding it.", "slug": "east-west-divan"}, {"path": "khan/humanities/global-culture/global-art-architecture/doug-fishbone/", "id": "YtibtTFpF6U", "title": "Doug Fishbone: Elmina", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nNew Yorker Doug Fishbone talks about his film Elmina, in which he joins the cast of an entirely Ghanaian-written and produced film melodrama as the lead character. There is no explanation for Fishbone's difference, leading us as viewers to question our preconceptions of fiction, narrative, cinema, and race.\u00a0Take a look at the artist's unique project as he guides us through big questions about roles and representations in film.", "slug": "doug-fishbone"}, {"path": "khan/humanities/global-culture/global-art-architecture/hrair-sarkissian/", "id": "dqn5CgMFfDY", "title": "Hrair Sarkissian: Syria's \"Execution Squares\"", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nSyrian artist Hrair Sarkissian was profoundly marked after witnessing a public execution as a child. Having grown up around photographs, Sarkissian decided to use his craft to engage with and document the places that have haunted him the most. Taken in the Syrian cities of Damascus, Aleppo, and Lattakia, Execution Squares takes us to the major public squares in which executions have taken place for civil rather than political crimes. Sarkissian photographed the squares in the early morning when the streets were quiet, around the time when executions are typically carried out.\nDoes seeing these empty squares encourage you to imagine that these peaceful places, and that no such acts of violence could have occurred there? Or does knowing Sarkissian\u2019s stories of what really happened give these photographs new meaning?", "slug": "hrair-sarkissian"}, {"path": "khan/humanities/global-culture/global-art-architecture/ai-weiwei/", "id": "PueYywpkJW8", "title": "Ai Weiwei: Sunflower Seeds", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nIn the process of crafting millions of porcelain sunflower seeds, Chinese artist Ai WeiWei creates a work of art as well as a positive social project for the village in rural China he employed to make the seeds.\u00a0Follow Sunflower Seeds\u00a0on its remarkable journey from conception to delivery, and hear the artist talk about his unique socio-political approach to making art.", "slug": "ai-weiwei"}, {"path": "khan/humanities/global-culture/global-art-architecture/isaac-julien/", "id": "lM32TL7VnOw", "title": "Isaac Julien, Ten Thousand Waves | MoMA", "kind": "Video", "description": "Artist Isaac Julien discusses his work, Ten Thousand Waves, and its installation.\u00a0To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "slug": "isaac-julien"}, {"path": "khan/humanities/global-culture/global-art-architecture/startled/", "id": "z-DvmxflJgA", "title": "Nawa, PixCell-Deer#24", "kind": "Video", "description": "Met curator John Carpenter on perception in Kohei Nawa\u2019s PixCell-Deer#24, 2011.\n\nThis taxidermied deer has been completely transformed through the artist\u2019s use of variably sized \u201cPixCell\u201d beads, a term he invented. PixCell is a portmanteau word combining the idea of a \u201ccell\u201d with that of a \u201cpixel,\u201d the smallest unit of a digital image. Whether intentionally or unintentionally on the artist\u2019s part, PixCell-Deer#24 resonates with a type of religious painting known as a Kasuga Deer Mandala, which features a deer\u2014the messenger animal of Shinto deities\u2014posed similarly with its head turned to the side, and with a round sacred mirror on its back. For Japanese artists the deer was depicted often as a companion of ancient sages and had auspicious or poetic associations.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit Find an Educator Resource.", "slug": "startled"}, {"path": "khan/humanities/global-culture/global-art-architecture/wang-peng/", "id": "LinNW-GIlP0", "title": "Wang Peng: Performance as politics in China and beyond", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nChinese artist Wang Peng started out as an abstract painter before turning to installations\u2014at a time when installation and performance art was banned in China. And yet the artist flourished in what could be considered a hostile environment, using the restrictions imposed upon him to play with how far his art could go instead of simply giving in to the ban. In one piece, the artist and his fellow performers blocked the entrance to a gallery by building a wall of bricks in front of it. The next day, police tore down the wall in an ironic subversion, unwittingly taking part in the performance and symbolically opening the gallery back up.\nUnderpinning Wang Peng\u2019s work is a steadfast resolve to challenge the conventions and boundaries of art. \"Your love of art should never be affected by politics,\u201d he says. Do you think that an artist can be unaffected by politics but still engage with political and social issues?\n\nLearn more about Wang Peng's performance and politics here.", "slug": "wang-peng"}, {"path": "khan/humanities/global-culture/global-art-architecture/michael-rakowitz/", "id": "iCmtnhPs7TI", "title": "Michael Rakowitz on Star Wars and Saddam Hussein", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nIn this video, artist Michael Rakowitz explores seemingly implausible connections and contradictions between objects and events. In his 2010 exhibition The worst condition is to pass under a sword which is not one\u2019s own, Rakowitz explores the unexpected links between Western science fiction and fantasy and the design of weapons, uniforms, and monuments under the regime of Saddam Hussein in Iraq.\n\nThe project explores how images and idea from popular culture have become powerful contemporary mythologies, creating a world in which fictional characters coexist with and inform even the most radical historical figures. What kind of effect do these strange juxtapositions have? Could they make an extreme figure more relatable?", "slug": "michael-rakowitz"}, {"path": "khan/humanities/global-culture/global-art-architecture/moma-laib-pollen-from-hazelnut/", "id": "e-_92MYcANk", "title": "Wolfgang Laib, \"Pollen from Hazelnut\"", "kind": "Video", "description": "Wolfgang Laib describes the pollen he collected over 27 years \"as the beginning of life.\" \u00a0To learn more about what artists have to say, take our online course, Modern and Contemporary Art, 1945-1989.", "slug": "moma-laib-pollen-from-hazelnut"}, {"path": "khan/humanities/global-culture/global-art-architecture/meschac-gaba/", "id": "e523Snw21Hk", "title": "Meschac Gaba", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nDrawing his greatest inspiration from his hometown of Cotonou, Benin, artist Meschac Gaba uses the city as his workspace and presentation site. Take a look as Gaba parades his work through the street, encouraging passersby to engage with his art, questioning what contemporary African art is and where it dwells. Find out what the artist means when he says, \"The Africa I come from, a lot of people don't know this Africa.\"", "slug": "meschac-gaba"}], "in_knowledge_map": false, "description": "Culture, like capitalism, is increasingly global. Artists work internationally and no single city is now the center of the art world. Istanbul, Beijing, Bogot\u00e1, Beirut, Lagos, and S\u00e3o Paulo all support thriving communities of artists.", "node_slug": "global-art-architecture", "render_type": "Tutorial", "topic_page_url": "/humanities/global-culture/global-art-architecture", "extended_slug": "humanities/global-culture/global-art-architecture", "kind": "Topic", "slug": "global-art-architecture"}], "in_knowledge_map": false, "description": "1970-the present: Beuys, Hirst, Hadid and more.", "node_slug": "global-culture", "render_type": "Subject", "topic_page_url": "/humanities/global-culture", "extended_slug": "humanities/global-culture", "kind": "Topic", "slug": "global-culture"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-asia/", "id": "art-asia", "hide": false, "title": "Art of Asia", "child_data": [{"kind": "Topic", "id": "xac82bc0e"}, {"kind": "Topic", "id": "x18af94a5"}, {"kind": "Topic", "id": "xe04f3365"}, {"kind": "Topic", "id": "xbde52eb5"}, {"kind": "Topic", "id": "x7260fba4"}, {"kind": "Topic", "id": "x77e41fc0"}, {"kind": "Topic", "id": "x7f61ab3c"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-asia/beginners-guide-asian-culture/", "id": "beginners-guide-asian-culture", "hide": false, "title": "A beginner's guide to Asian art and culture", "child_data": [{"kind": "Topic", "id": "x88e6c296"}, {"kind": "Topic", "id": "x463d4dea"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture/", "id": "hindu-art-culture", "hide": false, "title": "Hindu art and culture, an introduction", "child_data": [{"kind": "Article", "id": "xe6c8ced9"}, {"kind": "Article", "id": "x5d9c24e4"}, {"kind": "Article", "id": "x7c0265b6"}, {"kind": "Video", "id": "xee76b2c3"}, {"kind": "Article", "id": "xd4394c4d"}, {"kind": "Article", "id": "xeb0b8eb6"}, {"kind": "Video", "id": "x9d0ddff2"}, {"kind": "Article", "id": "xdd0969d8"}, {"kind": "Video", "id": "xa5ff69d5"}, {"kind": "Video", "id": "xcb609627"}, {"kind": "Article", "id": "x7d079e71"}, {"kind": "Video", "id": "x5c1b5cde"}, {"kind": "Article", "id": "xc1fa95b2"}], "children": [{"path": "khan/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture/hindu-temples/", "id": "o7-i6KLoEkc", "title": "Hindu temples", "kind": "Video", "description": "Explore the Hindu temples of India in this short documentary. Learn more about Hindu temples on education.asianart.org.", "slug": "hindu-temples"}, {"path": "khan/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture/shiva/", "id": "gYcwNXHrtlQ", "title": "The Hindu deity Shiva", "kind": "Video", "description": "Learn how to identify the Hindu deity Shiva and hear a story related to a depiction of Shiva in the Asian Art Museum's collection. Learn more about Shiva on education.asianart.org.", "slug": "shiva"}, {"path": "khan/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture/vishnu-and-krishna/", "id": "ZRGczIT9Cfc", "title": "The Hindu deities Vishnu and Krishna", "kind": "Video", "description": "Learn about the Hindu deity Vishnu and his avatar Krishna, and hear a story about Krishna defeating the serpent Kaliya. Learn more about Hindu deities on education.asianart.org.", "slug": "vishnu-and-krishna"}, {"path": "khan/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture/ganesha-deity/", "id": "sTLsPHluQdM", "title": "The Hindu deity Ganesha", "kind": "Video", "description": "Hear the origin story of the Hindu deity Ganesha and learn how to identify depictions of Ganesha with the use of artworks in the Asian Art Museum's collection. Learn more about Ganesha on\u00a0education.asianart.org.", "slug": "ganesha-deity"}, {"path": "khan/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture/festival-of-durga/", "id": "hk6rA-iY1c0", "title": "Festival of the Goddess Durga", "kind": "Video", "description": "Learn about a vibrant festival in India for the Hindu deity Durga, and discover related artworks in the Asian Art Museum's collection. For more information on Durga visit\u00a0education.asianart.org.", "slug": "festival-of-durga"}], "in_knowledge_map": false, "description": "Hinduism is one of the world\u2019s oldest religions. It has complex roots, and involves a vast array of practices and a host of deities. Its plethora of forms and beliefs reflects the tremendous diversity of India, where most of its one billion followers reside. Hinduism is more than a religion. It is a culture, a way of life, and a code of behavior.", "node_slug": "hindu-art-culture", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture", "extended_slug": "humanities/art-asia/beginners-guide-asian-culture/hindu-art-culture", "kind": "Topic", "slug": "hindu-art-culture"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/beginners-guide-asian-culture/buddhist-art-culture/", "id": "buddhist-art-culture", "hide": false, "title": "Buddhist art and culture, an introduction", "child_data": [{"kind": "Article", "id": "x0db8606f"}, {"kind": "Article", "id": "xfc194f4d"}, {"kind": "Video", "id": "x3c6f83fd"}, {"kind": "Video", "id": "xeead428c"}, {"kind": "Article", "id": "x36063beb"}, {"kind": "Article", "id": "xe8ef7bd2"}, {"kind": "Article", "id": "1330586045"}, {"kind": "Article", "id": "x53e1a18f"}, {"kind": "Article", "id": "xccdabac3"}, {"kind": "Video", "id": "x0c838595"}, {"kind": "Video", "id": "xe13bacd3"}, {"kind": "Article", "id": "x9c265a22"}, {"kind": "Article", "id": "x665cf0a5"}, {"kind": "Video", "id": "xe47510dc"}, {"kind": "Video", "id": "x4a08dd66"}, {"kind": "Article", "id": "xb6541cbe"}, {"kind": "Article", "id": "x6aefd753"}, {"kind": "Article", "id": "x0640a539"}], "children": [{"path": "khan/humanities/art-asia/beginners-guide-asian-culture/buddhist-art-culture/zen-buddhism/", "id": "_WAi2fwUqN4", "title": "Zen Buddhism", "kind": "Video", "description": "An introduction to Zen, a form of Buddhism that emphasizes seeking one's own Buddha nature through meditation.\u00a0 Learn more about Buddhism in Japan on the education.asianart.org.", "slug": "zen-buddhism"}, {"path": "khan/humanities/art-asia/beginners-guide-asian-culture/buddhist-art-culture/aam-stupa/", "id": "NJsLHcL3Bvs", "title": "The stupa", "kind": "Video", "description": "A short documentary on the stupa, a hemispherical mound that represents the burial mound of the Buddha. Learn more about the stupa on\u00a0education.asianart.org.", "slug": "aam-stupa"}, {"path": "khan/humanities/art-asia/beginners-guide-asian-culture/buddhist-art-culture/bodh-gaya/", "id": "qk-9Ez3xICY", "title": "Bodh Gaya: center of the Buddhist world", "kind": "Video", "description": "Discover Bodh Gaya, one of several sights in India associated with the birth of Buddhism. Learn more about Bodh Gaya on the education.asianart.org.", "slug": "bodh-gaya"}, {"path": "khan/humanities/art-asia/beginners-guide-asian-culture/buddhist-art-culture/varanasi/", "id": "JoC_x3Hzkkc", "title": "Varanasi: sacred city", "kind": "Video", "description": "A short documentary about one of India's most sacred cities, Varanasi. Learn more about Varanasi on education.asianart.org.", "slug": "varanasi"}, {"path": "khan/humanities/art-asia/beginners-guide-asian-culture/buddhist-art-culture/four-buddhas-at-the-american-museum-of-natural-history/", "id": "kHt6BgHxa8o", "title": "Four Buddhas at the American Museum of Natural History", "kind": "Video", "description": "A conversation at the American Museum of Natural History between Dr. Laurel Kendall, Curator, Asian Ethnographic Collections and Dr. Monique Scott, Assistant Director of Cultural Education in front of four Buddhist sculptures: Seated Gautama Buddha, 18th Century, cast brass, gilt (Thailand) Gandharan Seated Buddha with Double Halo, attributed to the 3rd Century, green-gray schist (Pakistan) Jizo, Kshitigarbha, Dhyani-Bodhisattao, 19th Century, wood, gold (Japan) Budai (Ho t'ai)/Maitreya, The Laughing Buddha, c. 1900, metal (China). \u00a0Produced by Dr. Beth Harris and Dr. Steven Zucker for Smarthistory at Khan Academy", "slug": "four-buddhas-at-the-american-museum-of-natural-history"}, {"path": "khan/humanities/art-asia/beginners-guide-asian-culture/buddhist-art-culture/buddha-and-mara/", "id": "lA8pSpp-FS4", "title": "The Buddha triumphing over Mara", "kind": "Video", "description": "The main figure in this stone sculpture from the 900s shows many characteristic features of images of the Buddha. Here we see elements that tell us we're in the presence of the Buddha as he was on the threshold of achieving enlightenment. Above his head are branches of heart-shaped leaves. They indicate the sacred bodhi tree, under which he is said to have attained enlightenment some 2,500 years ago. Learn more about this artwork on the education.asianart.org.", "slug": "buddha-and-mara"}], "in_knowledge_map": false, "description": "Among the founders of the world's major religions, the Buddha was the only teacher who did not claim to be other than an ordinary human being. The Buddha was simply a human being and he claimed no inspiration from any god or external power.", "node_slug": "buddhist-art-culture", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/beginners-guide-asian-culture/buddhist-art-culture", "extended_slug": "humanities/art-asia/beginners-guide-asian-culture/buddhist-art-culture", "kind": "Topic", "slug": "buddhist-art-culture"}], "in_knowledge_map": false, "description": "", "node_slug": "beginners-guide-asian-culture", "render_type": "Topic", "topic_page_url": "/humanities/art-asia/beginners-guide-asian-culture", "extended_slug": "humanities/art-asia/beginners-guide-asian-culture", "kind": "Topic", "slug": "beginners-guide-asian-culture"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/humanities/art-asia/imperial-china/", "id": "imperial-china", "hide": false, "title": "China", "child_data": [{"kind": "Topic", "id": "xac0665d7"}, {"kind": "Topic", "id": "xcb8d6c4b"}, {"kind": "Topic", "id": "xa554c907"}, {"kind": "Topic", "id": "x0c0633ae"}, {"kind": "Topic", "id": "xb62874f2"}, {"kind": "Topic", "id": "xcacb11b2"}, {"kind": "Topic", "id": "x4d6a02bc"}, {"kind": "Topic", "id": "xcc3efc78"}, {"kind": "Topic", "id": "xea4baa04"}, {"kind": "Topic", "id": "x34e86544"}, {"kind": "Topic", "id": "x30024960"}, {"kind": "Topic", "id": "xa1f7e57e"}, {"kind": "Topic", "id": "x64103eb2"}, {"kind": "Topic", "id": "x2bf93b29"}, {"kind": "Topic", "id": "x223a9150"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/humanities/art-asia/imperial-china/neolithic-art-china/", "id": "neolithic-art-china", "hide": false, "title": "Neolithic art in China", "child_data": [{"kind": "Article", "id": "x20446401"}, {"kind": "Article", "id": "xd7bd39f6"}, {"kind": "Article", "id": "x4defa30f"}, {"kind": "Video", "id": "x01531b07"}, {"kind": "Article", "id": "x1b6ee5eb"}, {"kind": "Article", "id": "x7177d6a6"}, {"kind": "Video", "id": "x18c3d480"}, {"kind": "Exercise", "id": "x48a34b1e"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/neolithic-art-china/working-jade/", "id": "d1oO1kbtt4s", "title": "Working jade", "kind": "Video", "description": "This video explores the significance and working of jade in China. Learn more about jade on the Asian Art Museum's education website.", "slug": "working-jade"}, {"path": "khan/humanities/art-asia/imperial-china/neolithic-art-china/jade-cong/", "id": "ld8kHvz1yN4", "title": "Jade Cong", "kind": "Video", "description": "Jade Cong, c. 2500 B.C.E., Liangzhu culture, Neolithic period, China (British Museum)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "jade-cong"}, {"path": "khan/humanities/art-asia/imperial-china/neolithic-art-china/jade-cong_1/", "id": "jade-cong", "title": "Jade Cong (quiz)", "description": "Test your knowledge of the Jade Cong.", "slug": "jade-cong_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "neolithic-art-china", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/neolithic-art-china", "extended_slug": "humanities/art-asia/imperial-china/neolithic-art-china", "kind": "Topic", "slug": "neolithic-art-china"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/imperial-china/beginners-guide-imperial-china/", "id": "beginners-guide-imperial-china", "hide": false, "title": "A beginner's guide to Imperial China", "child_data": [{"kind": "Article", "id": "x768daf1b"}, {"kind": "Article", "id": "xee20fff1"}, {"kind": "Article", "id": "x2549ad6e"}, {"kind": "Video", "id": "xda780e84"}, {"kind": "Video", "id": "xc45011fd"}, {"kind": "Video", "id": "xf5a14948"}, {"kind": "Video", "id": "x521dbd91"}, {"kind": "Video", "id": "x51fa7e3a"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/beginners-guide-imperial-china/chinese-archaeology/", "id": "-Po57YmaW3w", "title": "Discoveries in Chinese archaeology", "kind": "Video", "description": "Learn about some of the most prolific archeological sites in China, including the burial complex of the First Emperor of China and Sanxingdui. Learn more about archaeology and the study of ancient China on the Asian Art Museum's education website.", "slug": "chinese-archaeology"}, {"path": "khan/humanities/art-asia/imperial-china/beginners-guide-imperial-china/buddhist-temples-wutaishan/", "id": "wT4tXGcoyWw", "title": "Buddhist Temples at Wutaishan", "kind": "Video", "description": "The Chinese Buddhist figures seen in the galleries at the Asian Art Museum were originally placed in temples and monastic buildings. This video explores Wutaishan, an area with one of the heaviest concentration of Buddhist temples in China. Learn more about Buddhism on the Asian Art Museum's education website.", "slug": "buddhist-temples-wutaishan"}, {"path": "khan/humanities/art-asia/imperial-china/beginners-guide-imperial-china/decoding-chinese-calligraphy/", "id": "oRRiTo8sUwk", "title": "Decoding Chinese calligraphy", "kind": "Video", "description": "Master Chinese calligrapher Cai Xingyi demonstrates five major scripts. Try your hand at brushpainting in this digital interactive.", "slug": "decoding-chinese-calligraphy"}, {"path": "khan/humanities/art-asia/imperial-china/beginners-guide-imperial-china/appreciating-chinese-calligraphy/", "id": "MEN0CzGv5-Y", "title": "Appreciating Chinese calligraphy", "kind": "Video", "description": "Discover the art of Chinese calligraphy. Try your hand at brushpainting in this digital interactive.", "slug": "appreciating-chinese-calligraphy"}, {"path": "khan/humanities/art-asia/imperial-china/beginners-guide-imperial-china/heron-tower/", "id": "YFvgM8r7Uvc", "title": "Ascending the Heron Tower written in cursive script", "kind": "Video", "description": "Master Chinese calligrapher Cai Xingyi writes the poem Ascending the Heron Tower by Poet Wang Zhihuan (688\u2013742) in cursive script.", "slug": "heron-tower"}], "in_knowledge_map": false, "description": "China was a highly literate society that greatly valued poetry and brush-written calligraphy, which along with painting, were called the Three Perfections, reflecting the esteemed position of the arts in Chinese life.", "node_slug": "beginners-guide-imperial-china", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/beginners-guide-imperial-china", "extended_slug": "humanities/art-asia/imperial-china/beginners-guide-imperial-china", "kind": "Topic", "slug": "beginners-guide-imperial-china"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/imperial-china/shang-dynasty/", "id": "shang-dynasty", "hide": false, "title": "Shang dynasty (c. 1600-1050 B.C.E.)", "child_data": [{"kind": "Article", "id": "x817a2cc0"}, {"kind": "Article", "id": "x57b87d9f"}, {"kind": "Video", "id": "xd5cea3ac"}, {"kind": "Article", "id": "x87d1fc61"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/shang-dynasty/rhinoceros-vessel/", "id": "rdaxI6ekLLQ", "title": "Ritual vessel in the shape of a rhinoceros", "kind": "Video", "description": "Few Chinese vessels made during the Bronze Age (approx. 1500\u2013221 B.C.E.) were in the form of animals, and most of those featured surface decorations of other animals, like tigers or dragons. Listen to Jay Xu, Director of the Asian Art Museum, discuss one of the museum's masterpieces, a ritual vessel in the shape of a rhinoceros, as you view the object in 3D. Learn more about this ritual vessel on the Asian Art Museum's education website.", "slug": "rhinoceros-vessel"}], "in_knowledge_map": false, "description": "", "node_slug": "shang-dynasty", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/shang-dynasty", "extended_slug": "humanities/art-asia/imperial-china/shang-dynasty", "kind": "Topic", "slug": "shang-dynasty"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/imperial-china/later-zhao/", "id": "later-zhao", "hide": false, "title": "Later Zhao (319-351)", "child_data": [{"kind": "Video", "id": "x6bb6e3f8"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/later-zhao/buddha-338/", "id": "iKjVbO2R4_w", "title": "Seated Buddha dated 338", "kind": "Video", "description": "This Buddha has a unique status among Buddhas in China. It bears an inscription on the back that is equivalent to the year 338. This is the earliest date inscribed on any Buddha sculpture from China, anywhere in the world. Listen to Michael Knight, Curator Emeritus of Chinese Art at the Asian Art Museum, discuss one of the museum's masterpieces, a seated Buddha from 338, as you view images of the object and a rendering in 3D. Learn more about this seated Buddha on the Asian Art Museum's education website.", "slug": "buddha-338"}], "in_knowledge_map": false, "description": "", "node_slug": "later-zhao", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/later-zhao", "extended_slug": "humanities/art-asia/imperial-china/later-zhao", "kind": "Topic", "slug": "later-zhao"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/imperial-china/northern-wei/", "id": "northern-wei", "hide": false, "title": "Northern Wei dynasty (386 - 534)", "child_data": [{"kind": "Article", "id": "x62877ea0"}, {"kind": "Video", "id": "xf2ed2c9b"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/northern-wei/longmen-grottoes-unesconhk/", "id": "kFp7D0UxNxU", "title": "Longmen Grottoes (UNESCO/NHK)", "kind": "Video", "description": "The grottoes and niches of Longmen contain the largest and most impressive collection of Chinese art of the late Northern Wei and Tang Dynasties (316-907). These works, entirely devoted to the Buddhist religion, represent the high point of Chinese stone carving.", "slug": "longmen-grottoes-unesconhk"}], "in_knowledge_map": false, "description": "", "node_slug": "northern-wei", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/northern-wei", "extended_slug": "humanities/art-asia/imperial-china/northern-wei", "kind": "Topic", "slug": "northern-wei"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/imperial-china/northern-qi/", "id": "northern-qi", "hide": false, "title": "Northern Qi dynasty (550 - 577)", "child_data": [{"kind": "Video", "id": "719781801"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/northern-qi/bodhisattva-probably-avalokiteshvara-guanyin-northern-qi-dynasty-c-550-60/", "id": "8jFxkEQacVA", "title": "Bodhisattva", "kind": "Video", "description": "Bodhisattva, probably Avalokiteshvara (Guanyin), Northern Qi dynasty, c. 550-60, Shanxi Province, China, sandstone with pigments, 13-3/4 feet / 419.1 cm high (Metropolitan Museum of Art, New York)", "slug": "bodhisattva-probably-avalokiteshvara-guanyin-northern-qi-dynasty-c-550-60"}], "in_knowledge_map": false, "description": "The Northern Qi dynasty existed during a period of instability known as the \"Southern and Northern dynasties\" and was one of several dynasties that ruled different regions of China simultaneously. The Northern Qi dynasty lasted from 550 until 577.", "node_slug": "northern-qi", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/northern-qi", "extended_slug": "humanities/art-asia/imperial-china/northern-qi", "kind": "Topic", "slug": "northern-qi"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/imperial-china/tang-dynasty/", "id": "tang-dynasty", "hide": false, "title": "Tang dynasty (618-907)", "child_data": [{"kind": "Article", "id": "x26ffa772"}, {"kind": "Article", "id": "x9bd81007"}, {"kind": "Article", "id": "x771782c9"}, {"kind": "Article", "id": "x14228248"}, {"kind": "Article", "id": "x166913d4"}, {"kind": "Video", "id": "x08e8875a"}, {"kind": "Article", "id": "x0dde67e6"}, {"kind": "Article", "id": "xef4dd776"}, {"kind": "Article", "id": "x8415b928"}, {"kind": "Article", "id": "xd37c550c"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/tang-dynasty/chinese-buddhist-cave-shrines/", "id": "9bE-n0n2BBA", "title": "Chinese Buddhist cave shrines", "kind": "Video", "description": "This video explores ancient Buddhist cave shrines in China, including why the sites were created and the major sponsors and patrons. Learn more about Chinese Buddhist cave shrines on the Asian Art Museum's education website.", "slug": "chinese-buddhist-cave-shrines"}], "in_knowledge_map": false, "description": "The Tang dynasty was long and prosperous and is known as China's golden age. It was a period when China was powerful and engaged in long distance trade across networks that reached western Asia and Europe. This was also a period of improved education, a strong civil bureaucracy, and some of the most revered poetry, painting and ceramics ever made. The Tang dynasty existed from 618 until 907.", "node_slug": "tang-dynasty", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/tang-dynasty", "extended_slug": "humanities/art-asia/imperial-china/tang-dynasty", "kind": "Topic", "slug": "tang-dynasty"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/imperial-china/liao-dynasty/", "id": "liao-dynasty", "hide": false, "title": "Liao Dynasty (907\u20131125)", "child_data": [{"kind": "Video", "id": "x235c9195"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/liao-dynasty/divinity/", "id": "PZQTxPbvO64", "title": "Arhat (Luohan)", "kind": "Video", "description": "Met curator Denise Leidy on ugliness and divinity in Arhat (Luohan) dating from China\u2019s Liao dynasty, \u00a0c. 1000.\u00a0\n\nThis nearly life-size sculpture and its companion piece\u00a0are part of a group of about sixteen works that have been known in the West since 1913. They are thought to have come from a cave in Yixian, in Hebei province, and they represent arhats (or luohans, as they are known in China). Arhats were thought to have achieved an advanced (although not perfected) state of spiritual development, and they eventually became recognized as protectors of Buddhism. Both works are justifiably acclaimed as masterpieces of ceramic sculpture, both for their size and for the quality of their glaze, a three-toned or colored glaze known as sancai. The discovery of an ancient kiln in a village near Beijing in 1983 and its subsequent excavation in 1985 yielded much information that could be used to date these extraordinary sculptures. It seems reasonable, therefore, to date the more technically challenging, life-size works slightly later, probably to the late tenth or eleventh century.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, try this and also visit Find and educator resource.", "slug": "divinity"}], "in_knowledge_map": false, "description": "", "node_slug": "liao-dynasty", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/liao-dynasty", "extended_slug": "humanities/art-asia/imperial-china/liao-dynasty", "kind": "Topic", "slug": "liao-dynasty"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/imperial-china/song-dynasty/", "id": "song-dynasty", "hide": false, "title": "Song dynasty (960-1279)", "child_data": [{"kind": "Article", "id": "x0865c66e"}, {"kind": "Article", "id": "xd8dba019"}, {"kind": "Article", "id": "xede283d0"}, {"kind": "Article", "id": "x253dfee8"}, {"kind": "Video", "id": "xc50a3afa"}, {"kind": "Article", "id": "x16b3f0f7"}, {"kind": "Article", "id": "x77b24a8c"}, {"kind": "Article", "id": "x96ac9cc7"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/song-dynasty/metaphorical/", "id": "QvdMC_wY_K4", "title": "Liang Kai, Poet Strolling by a Marshy Bank", "kind": "Video", "description": "Met curator Shi-yee Liu on illusory nature in Liang Kai\u2019s Poet Strolling by a Marshy Bank,\u00a0first half of the 13th century.\n\nLiang Kai served as a painter-in-attendance at the Song Imperial Painting Academy in Hangzhou from about 1201 to 1204; he relinquished that prestigious position to live and paint at a Chan (Zen in Japanese) Buddhist temple. Like his best-known paintings, preserved mostly in Japanese collections, this small landscape conveys a spiritual intensity. Under the great cliff, in the stillness of the landscape, a solitary figure meditates on the illusory world before him.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, try this and also visit Find an educator resource.", "slug": "metaphorical"}], "in_knowledge_map": false, "description": "The Song dynasty which is divided between the Northern Song and the later Southern Song when land north of the Yangtze River was lost to the Jin Dynasty. The Song Dynasty witnessed important historical developments such as the first use of gunpowder, paper currency, and the identification of true north. This was also a period that saw creative production at the highest level including monumental landscape painting. The Song dynasty existed from 960 until 1279.", "node_slug": "song-dynasty", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/song-dynasty", "extended_slug": "humanities/art-asia/imperial-china/song-dynasty", "kind": "Topic", "slug": "song-dynasty"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/imperial-china/yuan-dynasty/", "id": "yuan-dynasty", "hide": false, "title": "Yuan dynasty (1271-1368)", "child_data": [{"kind": "Video", "id": "719786816"}, {"kind": "Article", "id": "x0592bf39"}, {"kind": "Article", "id": "x8375da91"}, {"kind": "Video", "id": "xabb669a1"}, {"kind": "Article", "id": "x8ae12421"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/yuan-dynasty/buddha-of-medicine-bhaishajyaguru-yaoshi-fo-c-1319/", "id": "CHfU9EDwOwU", "title": "Buddha of Medicine Bhaishajyaguru (Yaoshi fo)", "kind": "Video", "description": "Buddha of Medicine Bhaishajyaguru (Yaoshi fo), c. 1319, Yuan dynasty, water-based pigments on clay mixed with straw, 24 feet, 8 inches x 49 feet 7 inches / 751.8 cm x 1511.3 cm (Metropolitan Museum of Art, New York)", "slug": "buddha-of-medicine-bhaishajyaguru-yaoshi-fo-c-1319"}, {"path": "khan/humanities/art-asia/imperial-china/yuan-dynasty/david-vases/", "id": "lfIHzumEghQ", "title": "The David Vases", "kind": "Video", "description": "The David Vases, 1351 (Yuan dynasty), porcelain, cobalt and clear glaze, 63.6 x 20.7 cm each, Jingdezhen, Jiangxi province, China (British Museum)\n\n\u00a0\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "david-vases"}], "in_knowledge_map": false, "description": "The Yuan dynasty was established by the Mongol invader Kublai Khan and was a period of unified rule, trade and important developments in ceramics, painting, poetry, and theater. The Yuan dynasty lasted from 1271 until 1368.", "node_slug": "yuan-dynasty", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/yuan-dynasty", "extended_slug": "humanities/art-asia/imperial-china/yuan-dynasty", "kind": "Topic", "slug": "yuan-dynasty"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/imperial-china/ming-dynasty/", "id": "ming-dynasty", "hide": false, "title": "Ming dynasty (1368\u20131644)", "child_data": [{"kind": "Article", "id": "xec3bbd70"}, {"kind": "Article", "id": "xb7950c48"}, {"kind": "Article", "id": "x0dac1ca0"}, {"kind": "Video", "id": "x2dad7db1"}, {"kind": "Article", "id": "xf4e6c0a6"}, {"kind": "Video", "id": "x4f27a18c"}, {"kind": "Article", "id": "x7c19482a"}, {"kind": "Article", "id": "xe40b56e6"}, {"kind": "Video", "id": "xb4d0b237"}], "children": [{"path": "khan/humanities/art-asia/imperial-china/ming-dynasty/forbidden-city/", "id": "tPfYrmcfvYE", "title": "The Forbidden City", "kind": "Video", "description": "In 1420, in an effort to consolidate his control over the throne, the emperor of the Ming dynasty (1368\u20131644)\u00a0moved China's capital to a site in the North, now known as Bejing. There, he built a vast complex of palaces and administrative buildings now covering 178 acres. Because access was restricted to the imperial family and to those who had business with them, it came to be known as the Forbidden City. Learn more about the Ming dynasty (1368\u20131644) on the Asian Art Museum's education website.", "slug": "forbidden-city"}, {"path": "khan/humanities/art-asia/imperial-china/ming-dynasty/gardens-suzhou/", "id": "87QlGDfXh54", "title": "Classical gardens of Suzhou", "kind": "Video", "description": "This video explores the classical gardens of Suzhou, which are considered to be some of the most beautiful gardens in China. Learn more about China on the Asian Art Museum's education website.", "slug": "gardens-suzhou"}, {"path": "khan/humanities/art-asia/imperial-china/ming-dynasty/eternity/", "id": "F9SMvVtKxXM", "title": "Congyi, Cloudy Mountains", "kind": "Video", "description": "Met curator Maxwell K. Hearn on emptiness in Fang Congyi\u2019s Cloudy Mountains,\u00a0second half of 14th century.\n\nFang Congyi, a Daoist priest from Jiangxi, traveled extensively in the north before settling down at the seat of the Orthodox Unity Daoist church, the Shangqing Temple on Mount Longhu (Dragon Tiger Mountain), Jiangxi province. Imbued with Daoist mysticism, he painted landscapes that \"turned the shapeless into shapes and returned things that have shapes to the shapeless.\"\n\nAccording to Daoist geomantic beliefs, a powerful life energy pulsates through mountain ranges and watercourses in patterns known as longmo (dragon veins). In Cloudy Mountains, the painter's kinetic brushwork, wound up as if in a whirlwind, charges the mountains with an expressive liveliness that defies their physical structure. The great mountain range, weightless and dematerialized, resembles a dragon ascending into the clouds.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit \"Find an Educator Resource.\u201d", "slug": "eternity"}], "in_knowledge_map": false, "description": "", "node_slug": "ming-dynasty", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/imperial-china/ming-dynasty", "extended_slug": "humanities/art-asia/imperial-china/ming-dynasty", "kind": "Topic", "slug": "ming-dynasty"}], "in_knowledge_map": false, "description": "Imperial Chinese history begins in the 3rd century B.C.E. with Qin Shihuang, the first Emperor of China and ends with the fall of the Qing Dynasty in 1911.", "node_slug": "imperial-china", "render_type": "Topic", "topic_page_url": "/humanities/art-asia/imperial-china", "extended_slug": "humanities/art-asia/imperial-china", "kind": "Topic", "slug": "imperial-china"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-asia/korea-japan/", "id": "korea-japan", "hide": false, "title": "Korea", "child_data": [{"kind": "Topic", "id": "x3d85d517"}, {"kind": "Topic", "id": "x38ebbc2a"}, {"kind": "Topic", "id": "x2a13cde4"}, {"kind": "Topic", "id": "xedbd5e79"}, {"kind": "Topic", "id": "x35023131"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/korea-japan/korean-art/", "id": "korean-art", "hide": false, "title": "A beginner's guide to Korean art", "child_data": [{"kind": "Article", "id": "xb6ddd045"}, {"kind": "Article", "id": "xd4f87520"}, {"kind": "Video", "id": "x53df834f"}, {"kind": "Article", "id": "x7a887c86"}, {"kind": "Video", "id": "x4a5557f0"}], "children": [{"path": "khan/humanities/art-asia/korea-japan/korean-art/korean-buddhist-art/", "id": "thvh5PdR6yM", "title": "Korean Buddhist art", "kind": "Video", "description": "This video documents the creation of a Buddhist painting by the monk artist, Seol-min (formerly known as Jae-u), who has dedicated her life to keeping the tradition of Buddhist painting alive. Learn more about Korean Buddhism on education.asianart.org.", "slug": "korean-buddhist-art"}, {"path": "khan/humanities/art-asia/korea-japan/korean-art/guardian-king-of-west/", "id": "3UiffIzCNPQ", "title": "Guardian King of the West", "kind": "Video", "description": "In this video, Buddhist monk artists, Seol-min (formerly known as Jae-u) and Myung Chun discuss Korean Buddhist art and paint the Guardian King of the West, which is now in the Asian Art Museum's collection. This video also includes footage from a symbolic eye-opening ceremony, which took place at the museum on December 20, 2003. Learn more about Korean Buddhism.", "slug": "guardian-king-of-west"}], "in_knowledge_map": false, "description": "Discover the Royal Palaces of Seoul, monastic practices that keep traditional painting alive, a Confucian scholar's house and the tradition of Korean ceramics.", "node_slug": "korean-art", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/korea-japan/korean-art", "extended_slug": "humanities/art-asia/korea-japan/korean-art", "kind": "Topic", "slug": "korean-art"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/korea-japan/goryeo-dynasty/", "id": "goryeo-dynasty", "hide": false, "title": "Goryeo dynasty (918-1392)", "child_data": [{"kind": "Article", "id": "x36ed4259"}, {"kind": "Video", "id": "x68dd669c"}, {"kind": "Video", "id": "x63efd0fa"}], "children": [{"path": "khan/humanities/art-asia/korea-japan/goryeo-dynasty/korean-celadons/", "id": "2vSpWt7qC_M", "title": "Reviving traditional Korean celadons", "kind": "Video", "description": "Discover Goryeo dynasty (918\u20131392) celadons, among the most renowned of Asian ceramics.\u00a0 Learn more about the Goryeo dynasty (918\u20131392).", "slug": "korean-celadons"}, {"path": "khan/humanities/art-asia/korea-japan/goryeo-dynasty/ewer-with-lid/", "id": "gKhw23Tfn1U", "title": "Ewer with lid", "kind": "Video", "description": "This lustrous stoneware vessel is a ewer, or pitcher, dating to the early 1100s, during Korea's Goryeo dynasty (918\u20131392). It was probably used for wine, which may have been warmed by placing the ewer in a matching bowl of heated water. The ewer's color is called celadon, which is created by a glaze that includes iron oxide. Today, connoisseurs around the world continue to treasure Goryeo celadon as among the most precious items created by Korean artisans. Learn more about Korean art.", "slug": "ewer-with-lid"}], "in_knowledge_map": false, "description": "", "node_slug": "goryeo-dynasty", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/korea-japan/goryeo-dynasty", "extended_slug": "humanities/art-asia/korea-japan/goryeo-dynasty", "kind": "Topic", "slug": "goryeo-dynasty"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/korea-japan/joseon-dynasty/", "id": "joseon-dynasty", "hide": false, "title": "Joseon dynasty (1392\u20131910)", "child_data": [{"kind": "Article", "id": "x300d69d2"}, {"kind": "Article", "id": "x248734ee"}, {"kind": "Article", "id": "x1a081dcc"}, {"kind": "Article", "id": "xe04aee49"}, {"kind": "Video", "id": "xe3ca3778"}, {"kind": "Video", "id": "x31ee2cee"}, {"kind": "Video", "id": "xb646ca21"}], "children": [{"path": "khan/humanities/art-asia/korea-japan/joseon-dynasty/royal-palaces-seoul/", "id": "Lo-ajwD953o", "title": "Royal palaces of Seoul", "kind": "Video", "description": "In the heart of Seoul there are several historic palaces that were the residences of Korea's royal family from the 1400's to the mid-1900's. This documentary explores the art and architecture of these royal palaces of Seoul. Learn more about Korean art and culture on the education.asianart.org.", "slug": "royal-palaces-seoul"}, {"path": "khan/humanities/art-asia/korea-japan/joseon-dynasty/confucian-house/", "id": "8TqFGD9tZto", "title": "Confucian scholar's house", "kind": "Video", "description": "An introduction to Korean Confucianism and related architecture.\u00a0Learn more about Korean art and culture on education.asianart.org", "slug": "confucian-house"}, {"path": "khan/humanities/art-asia/korea-japan/joseon-dynasty/nine-cloud-dream/", "id": "DSvLJZnH2KQ", "title": "Nine Cloud Dream", "kind": "Video", "description": "This video re-tells a popular Korean folktale using a Korean folding screen from the collection of the Asian Art Museum. Learn more about Asian art and culture at education.asianart.org.", "slug": "nine-cloud-dream"}], "in_knowledge_map": false, "description": "", "node_slug": "joseon-dynasty", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/korea-japan/joseon-dynasty", "extended_slug": "humanities/art-asia/korea-japan/joseon-dynasty", "kind": "Topic", "slug": "joseon-dynasty"}], "in_knowledge_map": false, "description": "Explore the Royal Palaces of Seoul, monastic practices that keep traditional painting alive, the ancient temples of Nara, and the conservation of the Gan Ku Tiger Scroll in the British Museum.", "node_slug": "korea-japan", "render_type": "Topic", "topic_page_url": "/humanities/art-asia/korea-japan", "extended_slug": "humanities/art-asia/korea-japan", "kind": "Topic", "slug": "korea-japan"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-asia/art-japan/", "id": "art-japan", "hide": false, "title": "Japan", "child_data": [{"kind": "Topic", "id": "xae1e130c"}, {"kind": "Topic", "id": "xb7859158"}, {"kind": "Topic", "id": "x4dd966a4"}, {"kind": "Topic", "id": "x1875231b"}, {"kind": "Topic", "id": "x1e1fce17"}, {"kind": "Topic", "id": "xd9359831"}, {"kind": "Topic", "id": "xee08f562"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/art-japan/japanese-art/", "id": "japanese-art", "hide": false, "title": "Beginner\u2019s guide to Japanese Art", "child_data": [{"kind": "Article", "id": "xa3bbe741"}, {"kind": "Article", "id": "xe7cf7d96"}, {"kind": "Video", "id": "x3c6f83fd"}, {"kind": "Video", "id": "xdd48a302"}, {"kind": "Article", "id": "xacda8401"}], "children": [{"path": "khan/humanities/art-asia/art-japan/japanese-art/zen-buddhism/", "id": "_WAi2fwUqN4", "title": "Zen Buddhism", "kind": "Video", "description": "An introduction to Zen, a form of Buddhism that emphasizes seeking one's own Buddha nature through meditation.\u00a0 Learn more about Buddhism in Japan on the education.asianart.org.", "slug": "zen-buddhism"}, {"path": "khan/humanities/art-asia/art-japan/japanese-art/shinto/", "id": "RgQ4eCc38dM", "title": "Shinto", "kind": "Video", "description": "An introduction to Shinto, one of Japan's earliest belief systems.", "slug": "shinto"}], "in_knowledge_map": false, "description": "Discover the ancient temples of Nara, the process for making lacquer, the formats of Japanese painting, and the conservation of the Gan Ku Tiger Scroll in the British Museum.", "node_slug": "japanese-art", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/art-japan/japanese-art", "extended_slug": "humanities/art-asia/art-japan/japanese-art", "kind": "Topic", "slug": "japanese-art"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/art-japan/nara-period/", "id": "nara-period", "hide": false, "title": "Nara period (710\u2013794)", "child_data": [{"kind": "Article", "id": "xdba80ce8"}, {"kind": "Video", "id": "x24bfc5e9"}], "children": [{"path": "khan/humanities/art-asia/art-japan/nara-period/brahma-and-indra/", "id": "gibe5vJfq5w", "title": "Standing Brahma and standing Indra", "kind": "Video", "description": "Brahma and Indra, or Bonten and Taishakuten as they are known in Japanese, were Hindu deities brought into Buddhism as attendants of the Buddha or of bodhisattvas. The Asian Art Museum's Bonten and Taishakuten are the only large-scale, matched Japanese hollow dry lacquer sculptures from the Nara period in a U.S. collection. Even in Japan, sculptures like these are extremely rare and most have been designated as National Treasures or Important Cultural Properties. Learn more about the Hindu deity Brahma.", "slug": "brahma-and-indra"}], "in_knowledge_map": false, "description": "", "node_slug": "nara-period", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/art-japan/nara-period", "extended_slug": "humanities/art-asia/art-japan/nara-period", "kind": "Topic", "slug": "nara-period"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/art-japan/heian-period/", "id": "heian-period", "hide": false, "title": "Heian period (794\u20131185)", "child_data": [{"kind": "Article", "id": "xd09528f1"}, {"kind": "Article", "id": "x65089859"}, {"kind": "Video", "id": "x8d6fa1ef"}, {"kind": "Video", "id": "xa5e15649"}, {"kind": "Article", "id": "xa470d875"}], "children": [{"path": "khan/humanities/art-asia/art-japan/heian-period/fudo-myoo/", "id": "PjLQrZRg-WI", "title": "The Buddhist guardian deity: Fudo Myoo", "kind": "Video", "description": "Fudo Myoo (the Immovable One) is one of the powerful deities known as the Five Bright Kings in Japanese Buddhism and folk religion. As a manifestation of the central cosmic Buddha Mahavairochana (Japanese: Dainichi), Fudo is believed to protect Buddhism and its true adherents. Like all Bright Kings, Fudo assumes a frightening form, with a sword in his right hand and a rope in his left. He sits in front of a swiring flame of fire, with which he purifies evil. Learn more about Fudo Myoo.", "slug": "fudo-myoo"}, {"path": "khan/humanities/art-asia/art-japan/heian-period/stubborn/", "id": "etiD38iuYZk", "title": "Fud\u014d My\u014d\u014d (Achala-vidyaraja)", "kind": "Video", "description": "Met curator Sin\u00e9ad Vilbar on inner conflict in Fud\u014d My\u014d\u014d (Achala-vidyaraja) dating from Japan\u2019s Heian period, 12th century.\n\nFud\u014d My\u014d\u014d is the most widely represented of the Buddhist deities known as My\u014d\u014d, or Kings of Brightness. A fierce protector of the Buddhist Law, he is a direct emanation of the Buddha Dainichi Nyorai, the principal Buddha of Esoteric Buddhism. The first sculptures of Fud\u014d made in Japan were seated, but standing sculptures like this one were carved beginning in the eleventh century. Fud\u014d uses his sword to cut through ignorance and his lasso to reign in those who would block the path to enlightenment. The heavy weight of the shoulders and back is planted firmly on the stiffened legs, appropriate for a deity whose name means the \u201cImmovable.\u201d\n\nImages of Fud\u014d are often housed in temple halls called Gomad\u014d where a fire-burning ritual called the goma-e is performed. The ritual involves the burning of incense and other possessions to symbolically destroy defilements. This statue, originally composed of six hollowed-out pieces of wood, was formerly the central icon of the Kuhonji Gomad\u014d in Funasaka, twenty miles northwest of Kyoto. The hall has not survived. Fud\u014d would once have had a mandorla carved in the shape of wild flames and inserted behind him into the rock upon which he stands.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a\u00a0related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "stubborn"}], "in_knowledge_map": false, "description": "", "node_slug": "heian-period", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/art-japan/heian-period", "extended_slug": "humanities/art-asia/art-japan/heian-period", "kind": "Topic", "slug": "heian-period"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/art-japan/kamakura-period/", "id": "kamakura-period", "hide": false, "title": "Kamakura period (1185-1333)", "child_data": [{"kind": "Article", "id": "x4c6f2c8c"}, {"kind": "Video", "id": "x7edc7613"}, {"kind": "Video", "id": "xc2345ab8"}, {"kind": "Video", "id": "x14867198"}], "children": [{"path": "khan/humanities/art-asia/art-japan/kamakura-period/samurai-armor/", "id": "91x5bPf2Eag", "title": "A brief history of samurai armor", "kind": "Video", "description": "Learn about samurai armor by exploring artworks in the Asian Art Museum's collection. Learn more about samurai armor on the Asian Art Museum's education website.", "slug": "samurai-armor"}, {"path": "khan/humanities/art-asia/art-japan/kamakura-period/samurai-architecture/", "id": "fYbLyOrl8gs", "title": "From castle to palace: samurai architecture", "kind": "Video", "description": "Japan's warlords built fortresses during the constant civil warfare from 1300 to 1600. These castles housed the local government, had many defensive devices, and impressed rivals with their scale and their lord's ability to have them built and maintained. Learn more about the samurai.", "slug": "samurai-architecture"}, {"path": "khan/humanities/art-asia/art-japan/kamakura-period/tale-of-the-heike/", "id": "YE1MwI69ooU", "title": "Tale of the Heike", "kind": "Video", "description": "Learn about the famous samurai story, the Tale of the Heike and hear an excerpt from the tale. This video include artworks from the Asian Art Museum's collection. Learn more about the Tale of the Heike.", "slug": "tale-of-the-heike"}], "in_knowledge_map": false, "description": "", "node_slug": "kamakura-period", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/art-japan/kamakura-period", "extended_slug": "humanities/art-asia/art-japan/kamakura-period", "kind": "Topic", "slug": "kamakura-period"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/art-japan/muromachi-period/", "id": "muromachi-period", "hide": false, "title": "Muromachi period (1392\u20131573)", "child_data": [{"kind": "Article", "id": "xf65399f8"}, {"kind": "Article", "id": "xf1938cec"}, {"kind": "Video", "id": "x3422450a"}, {"kind": "Video", "id": "xa99ac88c"}, {"kind": "Article", "id": "x48b25ee5"}, {"kind": "Article", "id": "x7d83dc8f"}, {"kind": "Video", "id": "671702328"}, {"kind": "Article", "id": "x902c1ad5"}], "children": [{"path": "khan/humanities/art-asia/art-japan/muromachi-period/way-of-tea/", "id": "-z9xnAdR2y4", "title": "The Way of Tea", "kind": "Video", "description": "Discover the rich history of the Japanese tea gathering.\u00a0Learn more about Chanoyu: The Japanese Art of Tea.", "slug": "way-of-tea"}, {"path": "khan/humanities/art-asia/art-japan/muromachi-period/tearoom-at-the-asian/", "id": "4roG0EhmyDw", "title": "Teahouse at the Asian Art Museum", "kind": "Video", "description": "The Asian Art Museum\u2019s teahouse was designed by architect Osamu Sato as a functioning teahouse, as well as a display case. It is a three and three-quarters (sanjo daime) mat room. It is complete with an alcove for the display of a scroll and flowers, an electric-powered sunken hearth used in winter for the hot water kettle, and a functioning preparation area (mizuya) with fresh running water and drain. Its three interior ceiling levels display three different ceiling treatments.\u00a0 The teahouse has a sliding glass front that opens fully when in use for live tea demonstrations, but secures the space as a display case when not in use. It was constructed in Kyoto by the distinguished firm Nakamura Sotoji Komuten, long famous for refined traditional Japanese architecture built by specially trained, artisan carpenters and craftsmen. In September 2002, the teahouse was installed in the museum\u2019s second-floor collections gallery devoted to Japanese art. Four carpenters came from Kyoto to construct the teahouse and apply the final wall finishes. Learn more about this teahouse on the Asian Art Museum's education website.", "slug": "tearoom-at-the-asian"}, {"path": "khan/humanities/art-asia/art-japan/muromachi-period/negoro-ware-ewer/", "id": "_M_zc7DDZbU", "title": "Muromachi to Momoyama period Negoro ware ewer", "kind": "Video", "description": "Negoro ware ewer, Negoro workshop, Muromachi period (1392-1573) to Momoyama period (1573-1615) second half of 16th century, lacquered wood, Wakayama prefecture, Japan (Portland Art Museum)", "slug": "negoro-ware-ewer"}], "in_knowledge_map": false, "description": "", "node_slug": "muromachi-period", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/art-japan/muromachi-period", "extended_slug": "humanities/art-asia/art-japan/muromachi-period", "kind": "Topic", "slug": "muromachi-period"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/art-japan/edo-period/", "id": "edo-period", "hide": false, "title": "Edo period (1615\u20131868)", "child_data": [{"kind": "Article", "id": "x47664bd3"}, {"kind": "Article", "id": "x83f410d0"}, {"kind": "Video", "id": "xde8556f7"}, {"kind": "Article", "id": "x9740e3bc"}, {"kind": "Article", "id": "xbee0a4b6"}, {"kind": "Article", "id": "xa7b0c10e"}, {"kind": "Article", "id": "xa5e9a3d5"}, {"kind": "Article", "id": "x7c912ab7"}, {"kind": "Video", "id": "x1b60cf89"}, {"kind": "Video", "id": "x06d3d0a1"}, {"kind": "Video", "id": "x2eab605d"}, {"kind": "Video", "id": "x7e2c198e"}, {"kind": "Article", "id": "xd4ea5802"}, {"kind": "Video", "id": "xf83d9dcf"}, {"kind": "Article", "id": "x921d9859"}, {"kind": "Article", "id": "x4c22eef4"}, {"kind": "Article", "id": "x82cf9a1f"}, {"kind": "Article", "id": "x887064de"}, {"kind": "Article", "id": "x8c494bed"}, {"kind": "Article", "id": "x8a88e23a"}, {"kind": "Article", "id": "x15defcfb"}, {"kind": "Video", "id": "xe5b4002a"}], "children": [{"path": "khan/humanities/art-asia/art-japan/edo-period/genji-ukifune/", "id": "EWobKZYmPik", "title": "Genji Ukifune", "kind": "Video", "description": "Kabuki scholar Laurence Kominz discusses a woodblock print of a Kabuki actor and courtesan depicted in a scene from the famous Japanese epic The Tale of Genji.", "slug": "genji-ukifune"}, {"path": "khan/humanities/art-asia/art-japan/edo-period/hunting-for-fireflies/", "id": "ql8wVEetJkQ", "title": "Hunting for fireflies", "kind": "Video", "description": "Melinda Takeuchi, Professor in the Department of East Asian Languages and Cultures and the Department of Art History at Stanford University, discusses the coded meanings behind a woodblock print in the Asian Art Museum's collection.", "slug": "hunting-for-fireflies"}, {"path": "khan/humanities/art-asia/art-japan/edo-period/pleasure-quarter/", "id": "2tyEjbFaXdA", "title": "Street scene in the pleasure quarter of Edo Japan", "kind": "Video", "description": "Discover the cast of characters in a woodblock print of the Yoshiwara pleasure quarter in Edo Japan (present-day Tokyo).", "slug": "pleasure-quarter"}, {"path": "khan/humanities/art-asia/art-japan/edo-period/courtesan-cat/", "id": "WQBBbAhjxq0", "title": "Courtesan playing with a cat", "kind": "Video", "description": "Laura Allen, Curator of Japanese Art at the Asian Art Museum discusses a monochrome woodblock print of a courtesan playing with a cat from the Grabhorn collection.", "slug": "courtesan-cat"}, {"path": "khan/humanities/art-asia/art-japan/edo-period/courtesans-of-south-station/", "id": "idAmFwZ9BqY", "title": "Courtesans of the South Station", "kind": "Video", "description": "Scholars Melinda Takeuchi and Timon Screech discuss a woodblock print of courtesans in an unlicensed pleasure quarter during the Edo period (1615\u20131868) in Japan.", "slug": "courtesans-of-south-station"}, {"path": "khan/humanities/art-asia/art-japan/edo-period/ichikawa-danzo-iv/", "id": "are5VmVfK7Q", "title": "The actor Ichikawa Danzo IV in a Shibaraku role", "kind": "Video", "description": "Kabuki scholar Laurence Kominz and Melinda Takeuchi, Professor in the Department of East Asian Languages and Cultures and the Department of Art History at Stanford University, discuss a woodblock print of the Kabuki actor Ichikawa Danzo IV.", "slug": "ichikawa-danzo-iv"}, {"path": "khan/humanities/art-asia/art-japan/edo-period/conserving-gan-ku-tiger-scroll/", "id": "FsO3A07Abak", "title": "Conserving the Gan Ku Tiger scroll painting at the British Museum", "kind": "Video", "description": "\u00a9 Trustees of the British Museum", "slug": "conserving-gan-ku-tiger-scroll"}], "in_knowledge_map": false, "description": "", "node_slug": "edo-period", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/art-japan/edo-period", "extended_slug": "humanities/art-asia/art-japan/edo-period", "kind": "Topic", "slug": "edo-period"}], "in_knowledge_map": false, "description": "", "node_slug": "art-japan", "render_type": "Topic", "topic_page_url": "/humanities/art-asia/art-japan", "extended_slug": "humanities/art-asia/art-japan", "kind": "Topic", "slug": "art-japan"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-asia/south-asia/", "id": "south-asia", "hide": false, "title": "South Asia", "child_data": [{"kind": "Topic", "id": "x6537e0b7"}, {"kind": "Topic", "id": "xad92e98e"}, {"kind": "Topic", "id": "x03cfab2c"}, {"kind": "Topic", "id": "x87d78aac"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/south-asia/hindu-art/", "id": "hindu-art", "hide": false, "title": "Hindu art in South Asia", "child_data": [{"kind": "Video", "id": "x777743f6"}, {"kind": "Article", "id": "x7d67e3a8"}, {"kind": "Article", "id": "x7eacd04d"}, {"kind": "Article", "id": "x9b829fc0"}, {"kind": "Video", "id": "x4186b82f"}], "children": [{"path": "khan/humanities/art-asia/south-asia/hindu-art/beliefs-made-visible-i/", "id": "IX85uiG86RA", "title": "Beliefs made visible: Hindu art in South Asia", "kind": "Video", "description": "Explore Hinduism through clips of significant sites in South Asia and interviews with members of the Bay Area South Asian community. Learn more about Hinduism on the Asian Art Museum's education website.", "slug": "beliefs-made-visible-i"}, {"path": "khan/humanities/art-asia/south-asia/hindu-art/ganesha/", "id": "wkP1TF16z1M", "title": "The making and worship of Ganesha statues in Maharashtra", "kind": "Video", "description": "The elephant-headed Ganesha is one of the most popular Hindu gods -- the creator and remover of obstacles. The main stone sculpture in the display was carved from schist around 800 years ago and was originally positioned on the outside of a temple in the eastern state of Orissa (recently renamed Odisha). The display brings this sculpture together with other more recent depictions of Ganesha created for different purposes. Among these are the temporary statues created every year for the Ganeshchaturthi festival in Mumbai, which are placed in public or domestic shrines before being immersed in water at the end of the celebrations.\u00a0\u00a9 Trustees of the British Museum", "slug": "ganesha"}], "in_knowledge_map": false, "description": "Hinduism has very ancient roots but began to assume its mature form only in the fourth century C.E. The most characteristic features of mature Hinduism are the worship of divine images and the construction of temples to house these images. Hinduism has a vast pantheon of male and female deities but pre-eminent among them are Shiva and Vishnu.", "node_slug": "hindu-art", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/south-asia/hindu-art", "extended_slug": "humanities/art-asia/south-asia/hindu-art", "kind": "Topic", "slug": "hindu-art"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/south-asia/buddhist-art2/", "id": "buddhist-art2", "hide": false, "title": "Buddhist art in South Asia", "child_data": [{"kind": "Video", "id": "x64539d32"}, {"kind": "Video", "id": "x0c838595"}, {"kind": "Video", "id": "xe13bacd3"}, {"kind": "Article", "id": "x665cf0a5"}, {"kind": "Article", "id": "x2652b0e8"}, {"kind": "Article", "id": "xc04d1655"}, {"kind": "Article", "id": "x363d21ba"}, {"kind": "Article", "id": "xb6541cbe"}, {"kind": "Article", "id": "x6aefd753"}, {"kind": "Video", "id": "xcdbad937"}, {"kind": "Article", "id": "x0640a539"}], "children": [{"path": "khan/humanities/art-asia/south-asia/buddhist-art2/beliefs-made-visible-ii/", "id": "jl6S0wdeWk4", "title": "Beliefs made visible: Buddhist art in South Asia", "kind": "Video", "description": "Explore Buddhism through clips of significant sites in South Asia and interviews with members of the Bay Area South Asian community. Learn more about Buddhism on the Asian Art Museum's education website.", "slug": "beliefs-made-visible-ii"}, {"path": "khan/humanities/art-asia/south-asia/buddhist-art2/bodh-gaya/", "id": "qk-9Ez3xICY", "title": "Bodh Gaya: center of the Buddhist world", "kind": "Video", "description": "Discover Bodh Gaya, one of several sights in India associated with the birth of Buddhism. Learn more about Bodh Gaya on the education.asianart.org.", "slug": "bodh-gaya"}, {"path": "khan/humanities/art-asia/south-asia/buddhist-art2/varanasi/", "id": "JoC_x3Hzkkc", "title": "Varanasi: sacred city", "kind": "Video", "description": "A short documentary about one of India's most sacred cities, Varanasi. Learn more about Varanasi on education.asianart.org.", "slug": "varanasi"}, {"path": "khan/humanities/art-asia/south-asia/buddhist-art2/dark-lord/", "id": "9gPTOKcwp3c", "title": "Mahakala, Protector of the Tent", "kind": "Video", "description": "Met curator Kurt Behrendt on darkness in Mahakala, Protector of the Tent by the Sakya Order of Central Tibet, c. 1500.\n\nMahakala, the fierce emanation of the bodhisattva Avalokiteshvara, is one of the most popular guardians in the Tibetan Buddhist pantheon. He is especially revered by the Sakya Order, and the presence of Mahasiddhas and Sakyapa teachers framing the deity makes clear that this protector was commissioned for a Sakya monastery.\n\nMahakala tramples a corpse and holds a flaying knife and blood-filled skull cup, signifying the defeat of all impediments to enlightenment. He wears a profusion of gold and bone ornaments, and coiled around his belly is his Brahmin cord of a live green snake. Beneath it hangs a garland of severed heads. In the crooks of his elbows he supports a gandi gong, used to summon monks to assemblies and a symbol of his vow to protect the Buddhist university of Nalanda. His principal companions, Palden Remati and Palden Lhamo, appear to his left, and Legden Nagpo and Bhutadamara appear to his right. To the lower left is Brahmarupa, blowing a thighbone trumpet.\n\nThis tangka is one of the earliest and grandest of this subject, and marks the beginning of a transfer from what was largely a mural tradition to large-scale cloth paintings. Although commissioned for a Tibetan monastery, the work is strongly Nepali in style and composition, and can be related to paintings in the fifteenth-century Kumbum at Gyantse monastery, believed to have been painted under Newari direction.\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, try this and also visit Find an Educator Resource.\n\nView this work on metmuseum.org.", "slug": "dark-lord"}], "in_knowledge_map": false, "description": "Buddhism was established in the fifth century B.C.E. by the Buddha or \"enlightened one.\" However it was not until the third century B.C.E. that Buddhism enjoyed royal patronage under the Mauryan kings\u2014notably Ashoka\u2014and spread to all parts of the subcontinent. Buddhism continued to flourish in subsequent centuries, reaching South East Asia in the fifth century C.E. and Tibet in the seventh.", "node_slug": "buddhist-art2", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/south-asia/buddhist-art2", "extended_slug": "humanities/art-asia/south-asia/buddhist-art2", "kind": "Topic", "slug": "buddhist-art2"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/south-asia/afghanistan/", "id": "afghanistan", "hide": false, "title": "Art in Afghanistan", "child_data": [{"kind": "Video", "id": "xf671db05"}, {"kind": "Video", "id": "x59760512"}, {"kind": "Video", "id": "xb21ba5c7"}, {"kind": "Article", "id": "x42a1661e"}], "children": [{"path": "khan/humanities/art-asia/south-asia/afghanistan/afghanistan-crossroads-ancient-world/", "id": "gATXnxAE8sI", "title": "Crossroads of the Ancient World", "kind": "Video", "description": "Discover the remarkable story of the survival, discovery and display of these ancient treasures.\u00a0\u00a9 Trustees of the British Museum", "slug": "afghanistan-crossroads-ancient-world"}, {"path": "khan/humanities/art-asia/south-asia/afghanistan/lasting-legacy-alexander-great/", "id": "b9mBLNOr8rw", "title": "Afghanistan: The lasting legacy of Alexander the Great", "kind": "Video", "description": "Alexander became king of Macedonia in 336 BC. He immediately set about conquering neighbouring lands. By the time he died in 323 BC, aged 31, he ruled most of the then known world from Greece to the borders of India.\u00a0\u00a9 Trustees of the British Museum", "slug": "lasting-legacy-alexander-great"}, {"path": "khan/humanities/art-asia/south-asia/afghanistan/hidden-treasures-afghanistan/", "id": "aHx3k9NhIEM", "title": "Hidden treasures revealed", "kind": "Video", "description": "A story of daring and intrigue - archaeologists discovered the treasures of Afghanistan's nomadic ancestors but then had to hide them to keep them safe.\u00a0\u00a9 Trustees of the British Museum", "slug": "hidden-treasures-afghanistan"}], "in_knowledge_map": false, "description": "Archaeologists discovered treasures from Afghanistan's nomadic ancestors but then had to hide them to keep them safe. Learn more about this remarkable story of the survival and discovery of treasures from this ancient land.", "node_slug": "afghanistan", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/south-asia/afghanistan", "extended_slug": "humanities/art-asia/south-asia/afghanistan", "kind": "Topic", "slug": "afghanistan"}], "in_knowledge_map": false, "description": "This section includes both Hindu and Buddhist art.", "node_slug": "south-asia", "render_type": "Topic", "topic_page_url": "/humanities/art-asia/south-asia", "extended_slug": "humanities/art-asia/south-asia", "kind": "Topic", "slug": "south-asia"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-asia/southeast-asia/", "id": "southeast-asia", "hide": false, "title": "Southeast Asia", "child_data": [{"kind": "Topic", "id": "xefe6bf38"}, {"kind": "Topic", "id": "x3ec991cc"}, {"kind": "Topic", "id": "x58b516c4"}, {"kind": "Topic", "id": "x472e5ac1"}, {"kind": "Topic", "id": "x25d63c94"}, {"kind": "Topic", "id": "x124e1bb4"}, {"kind": "Topic", "id": "xf11dea8c"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/southeast-asia/mainland-se-asia/", "id": "mainland-se-asia", "hide": false, "title": "Cambodia", "child_data": [{"kind": "Article", "id": "x6f91791e"}, {"kind": "Video", "id": "xc97f50b9"}, {"kind": "Video", "id": "xf1c3ae2f"}, {"kind": "Video", "id": "xdc74eaa2"}], "children": [{"path": "khan/humanities/art-asia/southeast-asia/mainland-se-asia/angkor-unescotbs/", "id": "KKEW_etByJo", "title": "Angkor (UNESCO/TBS)", "kind": "Video", "description": "Angkor is one of the most important archaeological sites in South-East Asia. Stretching over some 400 km2, including forested area, Angkor Archaeological Park contains the magnificent remains of the different capitals of the Khmer Empire, from the 9th to the 15th century. They include the famous Temple of Angkor Wat and, at Angkor Thom, the Bayon Temple with its countless sculptural decorations. UNESCO has set up a wide-ranging programme to ... Source: UNESCO TV / \u00a9 TBS Produced by TBS Supported by Sony URL: http://whc.unesco.org/en/list/668/", "slug": "angkor-unescotbs"}, {"path": "khan/humanities/art-asia/southeast-asia/mainland-se-asia/angkor-temple-mountains/", "id": "fPc20_vtlaM", "title": "Angkor temple mountains", "kind": "Video", "description": "This video explores the ancient kingdom of Angkor , which was one of the most powerful states in Southeast Asia from the 800s to the 1300s. A succession of kings built huge temples that remain in Cambodia today as some of the world's greatest religious monuments. Learn more about artworks from Southeast Asia on education.asianart.org.", "slug": "angkor-temple-mountains"}, {"path": "khan/humanities/art-asia/southeast-asia/mainland-se-asia/shiva-and-parvati/", "id": "gndFqgEPNOs", "title": "The Hindu deities Shiva and Parvati", "kind": "Video", "description": "Apart from their damaged limbs, these 1,000-year-old Cambodian sculptures survive in excellent condition, and the fact that they have remained together makes them rare. These statues would have been in the inner sanctuary of a Hindu temple, a huge stone complex built up like a step pyramid, with the sanctuary at the top. Images of Shiva acting out his power in the world might be found on the outside of an ancient Cambodian temple, but inside the temple the deity would be shown standing upright and still, conveying a sense of resolute calm to all who gazed upon him. Learn more about the deities Shiva and Parvati.\n\nThe third eye in the middle of the forehead of the male figure identifies him as the Hindu deity Shiva. His wife is Parvati. Both these deities can be represented in supernatural forms with multiple arms, and both have violent and frightening forms as well. Here, however, they are shown in the guise of a graceful young man and woman. Before and after the period of these sculptures, Angkorian art usually emphasized the power and remoteness of the gods. In the late 900s, however, and continuing for several generations, gentleness and sensitivity were sometimes emphasized. Notice here the carefully calculated contrast of minutely textured clothing and jewelry with the expanses of smooth, soft skin. The sculptor has also taken advantage of the different color tonalities of the two pieces of stone. Scientific study has shown that they came from different parts of a single quarry.", "slug": "shiva-and-parvati"}], "in_knowledge_map": false, "description": "", "node_slug": "mainland-se-asia", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/southeast-asia/mainland-se-asia", "extended_slug": "humanities/art-asia/southeast-asia/mainland-se-asia", "kind": "Topic", "slug": "mainland-se-asia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/southeast-asia/maritime-se-asia/", "id": "maritime-se-asia", "hide": false, "title": "Indonesia", "child_data": [{"kind": "Article", "id": "xe883434a"}, {"kind": "Article", "id": "xeb147edc"}, {"kind": "Article", "id": "xd202ecc2"}, {"kind": "Article", "id": "x51271a5b"}, {"kind": "Article", "id": "x31fabf90"}, {"kind": "Video", "id": "xdea76f34"}, {"kind": "Article", "id": "x82b36ac4"}], "children": [{"path": "khan/humanities/art-asia/southeast-asia/maritime-se-asia/wayang-golek/", "id": "Wph0cBNi7Yo", "title": "Indonesian rod puppets (wayang golek)", "kind": "Video", "description": "Indonesian rod puppet (wayang golek) performances are a kind of blessing bestowed on special events such as circumcisions, weddings, celebrations\u00a0of the ancestors, and other rites of passage and public events. The performers may be hired by an individual or a\u00a0family holding a life cycle ceremony, or by an entire village. A performance is meant to engage all members of the\u00a0community.\u00a0 Puppet Master Kathey Foley discusses the charcter types associated with Indonesian rod puppets. \u00a0Learn more about the puppet theater of Indonesia.", "slug": "wayang-golek"}], "in_knowledge_map": false, "description": "", "node_slug": "maritime-se-asia", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/southeast-asia/maritime-se-asia", "extended_slug": "humanities/art-asia/southeast-asia/maritime-se-asia", "kind": "Topic", "slug": "maritime-se-asia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/southeast-asia/cambodia/", "id": "cambodia", "hide": false, "title": "Cambodia", "child_data": [{"kind": "Video", "id": "xf1c3ae2f"}], "children": [{"path": "khan/humanities/art-asia/southeast-asia/cambodia/angkor-temple-mountains/", "id": "fPc20_vtlaM", "title": "Angkor temple mountains", "kind": "Video", "description": "This video explores the ancient kingdom of Angkor , which was one of the most powerful states in Southeast Asia from the 800s to the 1300s. A succession of kings built huge temples that remain in Cambodia today as some of the world's greatest religious monuments. Learn more about artworks from Southeast Asia on education.asianart.org.", "slug": "angkor-temple-mountains"}], "in_knowledge_map": false, "description": "", "node_slug": "cambodia", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/southeast-asia/cambodia", "extended_slug": "humanities/art-asia/southeast-asia/cambodia", "kind": "Topic", "slug": "cambodia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/southeast-asia/bali/", "id": "bali", "hide": false, "title": "Bali", "child_data": [{"kind": "Article", "id": "x449a8607"}, {"kind": "Article", "id": "xd39a7a76"}, {"kind": "Article", "id": "x36b49afa"}, {"kind": "Video", "id": "xafb0973d"}, {"kind": "Video", "id": "x59d2bb3f"}, {"kind": "Video", "id": "xa47604ec"}, {"kind": "Video", "id": "xb6be25cd"}, {"kind": "Video", "id": "x460cc64d"}, {"kind": "Video", "id": "xa3edc77a"}], "children": [{"path": "khan/humanities/art-asia/southeast-asia/bali/balinese-shadow-theater/", "id": "Z9KoBRGc3_s", "title": "Balinese shadow theater", "kind": "Video", "description": "Watch an excerpt from the Hindu epic, the\u00a0Mahabharata. Performed Shadowmaster I Wayan Nartha.", "slug": "balinese-shadow-theater"}, {"path": "khan/humanities/art-asia/southeast-asia/bali/balinese-dance/", "id": "71L7-dyQsoQ", "title": "Balinese dance, costumes, music", "kind": "Video", "description": "This video features examples of different types of Balinese dance, costumes, and music.", "slug": "balinese-dance"}, {"path": "khan/humanities/art-asia/southeast-asia/bali/balinese-dance-costumes/", "id": "i76VT8Ctkb8", "title": "Symbolism in Balinese dance costumes", "kind": "Video", "description": "This video features Balinese dancer, Kompiang Metri Davies, discussing the symbolism of Balinese dance costumes.", "slug": "balinese-dance-costumes"}, {"path": "khan/humanities/art-asia/southeast-asia/bali/boar-barong/", "id": "VpVwgQjjaO4", "title": "Balinese boar Barong dance performance", "kind": "Video", "description": "The Barong is a protective deity that can take on a variety of animal forms\u2014lions, tigers, and boars are some of the more common images\u2014and each one is addressed using a respectful title such as Great God or Great Lord. Many villages, especially in southern Bali, have their own Barong figure. The Barong mask is kept in a shrine within a temple and brought out for use. The Barong is one of the most prominent images seen in the performing arts of Bali. This video features the Calonarang, a dance drama intended to chase away evil and purify a village.", "slug": "boar-barong"}, {"path": "khan/humanities/art-asia/southeast-asia/bali/balinese-masks/", "id": "6HMYQfI76fQ", "title": "Repairing sacred Balinese masks", "kind": "Video", "description": "Barong masks are often sold as souvenirs, but true ritual Barong are created using a particular type of wood with special ceremonies marking key points in the process. In this video, scholar I Wayan Dibia is at the home of mask carver I Wayan Tanguhh and describes the process of repairing a Barong mask. The Barong is a protective deity that can take on a variety of animal forms--lions, tigers, and boars are some of the more common images\u2014and each one is addressed using a respectful title such as Great God or Great Lord. Many villages, especially in southern Bali, have their own Barong figure. The Barong mask is kept in a shrine within a temple and brought out for use.", "slug": "balinese-masks"}, {"path": "khan/humanities/art-asia/southeast-asia/bali/balinese-mask-carver/", "id": "VVlmNg8Udq8", "title": "Balinese mask carver", "kind": "Video", "description": "Artist Wayan Sira carves a mask at his home in Gianyar, Bali.", "slug": "balinese-mask-carver"}], "in_knowledge_map": false, "description": "", "node_slug": "bali", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/southeast-asia/bali", "extended_slug": "humanities/art-asia/southeast-asia/bali", "kind": "Topic", "slug": "bali"}], "in_knowledge_map": false, "description": "Discover the extraordinary art and architecture of this vast region which includes palaces, temples and mosques inspired by the Hindu, Buddhist and Islamic religions.", "node_slug": "southeast-asia", "render_type": "Topic", "topic_page_url": "/humanities/art-asia/southeast-asia", "extended_slug": "humanities/art-asia/southeast-asia", "kind": "Topic", "slug": "southeast-asia"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-asia/himalayas/", "id": "himalayas", "hide": false, "title": "The Himalayas", "child_data": [{"kind": "Topic", "id": "xce0b2768"}, {"kind": "Topic", "id": "x14d51a2c"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/himalayas/nepal/", "id": "nepal", "hide": false, "title": "Nepal", "child_data": [{"kind": "Video", "id": "x53ed502f"}], "children": [{"path": "khan/humanities/art-asia/himalayas/nepal/secrets-of-the-stupa/", "id": "gs3fWMI3nFA", "title": "Secrets of the stupa", "kind": "Video", "description": "Jeffrey Durham, Assistant Curator of Himalayan Art at the Asian Art Museum, discusses the secrets of the Svayambhu stupa in the Asian Art Museum's collection. For more information on the Svayambhu stupa: education.asianart.org", "slug": "secrets-of-the-stupa"}], "in_knowledge_map": false, "description": "", "node_slug": "nepal", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/himalayas/nepal", "extended_slug": "humanities/art-asia/himalayas/nepal", "kind": "Topic", "slug": "nepal"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-asia/himalayas/tibet/", "id": "tibet", "hide": false, "title": "Tibet", "child_data": [{"kind": "Video", "id": "x6b9dcd84"}, {"kind": "Article", "id": "xd853adef"}, {"kind": "Video", "id": "x815824c6"}, {"kind": "Article", "id": "xe958f455"}, {"kind": "Article", "id": "xe7adb224"}, {"kind": "Article", "id": "x50321504"}, {"kind": "Article", "id": "xd5d395eb"}, {"kind": "Article", "id": "xb6a4762d"}, {"kind": "Article", "id": "xf2e4b3e9"}, {"kind": "Video", "id": "x61a17697"}, {"kind": "Article", "id": "x1ea77436"}, {"kind": "Article", "id": "x010ba962"}, {"kind": "Article", "id": "x9feb5c72"}, {"kind": "Article", "id": "xed8390dc"}, {"kind": "Article", "id": "xac823e27"}, {"kind": "Article", "id": "x28ab9600"}], "children": [{"path": "khan/humanities/art-asia/himalayas/tibet/sacred-arts-of-tibet/", "id": "omy9xziXIEI", "title": "Sacred arts of Tibet", "kind": "Video", "description": "Discover the sacred arts of Tibet. Learn more about Tibet on the\u00a0Asian Art Museum's education website.", "slug": "sacred-arts-of-tibet"}, {"path": "khan/humanities/art-asia/himalayas/tibet/views-of-tibet/", "id": "DP4-S716q4E", "title": "Views of Tibet", "kind": "Video", "description": "View important Buddhist sites and rituals in Tibet. Note: This video does not include narration.", "slug": "views-of-tibet"}, {"path": "khan/humanities/art-asia/himalayas/tibet/simhavaktra-dakini/", "id": "0TRjw-Ot9Pc", "title": "The Buddhist deity Simhavaktra Dakini", "kind": "Video", "description": "Simhavaktra Dakini, the ferocious lion-faced guardian of Vajrayana Buddhism, is a female \u201csky-walker\u201d\u00a0who guides human beings along the right path. This powerful spirit can remove physical hindrances and\u00a0spiritual obstacles such as pride and ego. When she is portrayed alone, like here, she dances gracefully; her\u00a0right leg is raised and bent, and her left leg would usually be planted on a prostrate demonic figure, which\u00a0in this case is missing. Originally she would have held a chopper (a curved, chopping knife) in her right\u00a0hand and a bowl made from a human skull in her left. These are also missing. She is naked except for\u00a0jewelry (originally inset with semiprecious stones), a tiger skin is wrapped around her waist, and human\u00a0skin is knotted around her shoulders.\nTogether with Makaravaktra Dakini (a crocodile-headed dakini), Simhavaktra attends Penden Lhamo, the only female goddess among the Eight Guardians of the Dharma who protect the teachings\u00a0of the Buddha. She is a special inner protectress of various lineages including the Gelukpa Order and its\u00a0two leaders, the Dalai and Panchen Lamas.\u00a0\n\nThe size and quality of this piece indicate it was an imperial object made for the Qing dynasty\u00a0(1644\u20131911) court in China. Learn more on the\u00a0Asian Art Museum's education website.", "slug": "simhavaktra-dakini"}], "in_knowledge_map": false, "description": "", "node_slug": "tibet", "render_type": "Tutorial", "topic_page_url": "/humanities/art-asia/himalayas/tibet", "extended_slug": "humanities/art-asia/himalayas/tibet", "kind": "Topic", "slug": "tibet"}], "in_knowledge_map": false, "description": "", "node_slug": "himalayas", "render_type": "Topic", "topic_page_url": "/humanities/art-asia/himalayas", "extended_slug": "humanities/art-asia/himalayas", "kind": "Topic", "slug": "himalayas"}], "in_knowledge_map": false, "description": "This section looks at the art and cultures of Imperial China (for ancient China please see the section, \"Ancient Art and Civilizations\" above), Hindu and Buddhist from South Asia, the great temple and palace complexes of Southeast Asia, and the art and architecture of Korea and Japan. Dr. Beth Harris and Dr. Steven Zucker of Smarthistory together with leading art historians, and our museum partners have created hundreds of short engaging conversational videos and articles, making Khan Academy one of the most accessible and extensive resources for the study of the history of art.", "node_slug": "art-asia", "render_type": "Subject", "topic_page_url": "/humanities/art-asia", "extended_slug": "humanities/art-asia", "kind": "Topic", "slug": "art-asia"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-africa/", "id": "art-africa", "hide": false, "title": "Art of Africa", "child_data": [{"kind": "Topic", "id": "x9be500e2"}, {"kind": "Topic", "id": "xd739fb31"}, {"kind": "Topic", "id": "x7a5567df"}, {"kind": "Topic", "id": "xfbc0941a"}, {"kind": "Topic", "id": "x05e51a4b"}, {"kind": "Topic", "id": "x1d8ba84d"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-africa/west-africa/", "id": "west-africa", "hide": false, "title": "West Africa", "child_data": [{"kind": "Topic", "id": "x22f4f783"}, {"kind": "Topic", "id": "xd2a8288a"}, {"kind": "Topic", "id": "x56f02c84"}, {"kind": "Topic", "id": "x04bcbe17"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-africa/west-africa/ghana/", "id": "ghana", "hide": false, "title": "Ghana", "child_data": [{"kind": "Video", "id": "x9661c25a"}], "children": [{"path": "khan/humanities/art-africa/west-africa/ghana/sika-dwa-kofi-golden-stool/", "id": "6bsWW4Ke_Hs", "title": "Sika dwa kofi (Golden Stool), Asante people", "kind": "Video", "description": "Sika dwa kofi (Golden Stool), Asante people (Ghana), c. 1700 and Asante gold weights (University of Pennsylvania Museum of Archaeology and Anthropology)\nSpeakers: Dr. Peri Klemm and Dr. Beth Harris", "slug": "sika-dwa-kofi-golden-stool"}], "in_knowledge_map": false, "description": "Republic of Ghana is a country in West Africa that is home to numerous peoples including the Asante", "node_slug": "ghana", "render_type": "Tutorial", "topic_page_url": "/humanities/art-africa/west-africa/ghana", "extended_slug": "humanities/art-africa/west-africa/ghana", "kind": "Topic", "slug": "ghana"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-africa/west-africa/mali1/", "id": "mali1", "hide": false, "title": "Mali", "child_data": [{"kind": "Article", "id": "x3d0499b8"}, {"kind": "Video", "id": "x5e8e651a"}], "children": [{"path": "khan/humanities/art-africa/west-africa/mali1/bundle-of-emotions/", "id": "H-aDABqFY6s", "title": "Seated Figure", "kind": "Video", "description": "Met curator Ya\u00eblle Biro on humanity in Seated Figure by the Djenn\u00e9 peoples of Mali and the Inland Niger Delta region.\n\nThis haunting figure huddles with its leg hugged to its chest and its head dropped on its knee. It simultaneously suggests the knotted tension of anxiety and the sublime absorption of deep prayer. Created over 700 years ago, in the Inland Niger Delta region of present-day Mali, this elegant work's intense emotional immediacy blurs the boundaries of time and place.\u00a0This terracotta sculpture comes from a site called Jenne-jeno, the oldest known city in sub-Saharan Africa. Jenne-jeno flourished in the ninth century C.E., but declined and was abandoned by 1400. Items of cast brass and forged iron, clay vessels, and figures like this one survive. They testify to what scholars contend was a richly varied and highly sophisticated urban society.\n\nA few controlled archaeological digs provide only the vaguest outlines of the original significance of the art of this time and region. Recovered terracotta figures are frequently quite detailed. They include jewelry, clothing, and body ornaments such as the parallel columns of bumps and circles on the back of this work. Sometimes they cover the entire body and seem to represent the pustules of some dreadful illness. Sculptures like this one may represent ancestors or mythic characters, or might have served as guardians. Here, the figure's shaved head and attitude of introspection resemble mourning customs still practiced by many cultures in sub-Saharan Africa. It is possible that the earlier peoples of the Inland Niger Delta had similar ritual methods to express grief over the death of loved ones.\n\nView this work on\u00a0metmuseum.org.\n\nAre you an educator? Here's a related lesson plan.\u00a0For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "bundle-of-emotions"}], "in_knowledge_map": false, "description": "The Republic of Mali is part of West Africa and has a varied geography. In the south and west are verdant river valleys while the north and east jut into the Sahara Desert. It is a French speaking nation though dozens of languages are spoken there. Islam was introduced in the 11th century and is the dominant religion.", "node_slug": "mali1", "render_type": "Tutorial", "topic_page_url": "/humanities/art-africa/west-africa/mali1", "extended_slug": "humanities/art-africa/west-africa/mali1", "kind": "Topic", "slug": "mali1"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-africa/west-africa/nigeria/", "id": "nigeria", "hide": false, "title": "Nigeria", "child_data": [{"kind": "Article", "id": "xd1b6fb76"}, {"kind": "Article", "id": "xffb2b836"}, {"kind": "Article", "id": "x3372fcb9"}, {"kind": "Article", "id": "xfe06e783"}, {"kind": "Article", "id": "x8644d000"}, {"kind": "Article", "id": "x0d1b2a9e"}, {"kind": "Article", "id": "xc3ffa95e"}, {"kind": "Video", "id": "x9381799e"}, {"kind": "Video", "id": "x5bdf86f7"}, {"kind": "Video", "id": "xa909c637"}, {"kind": "Video", "id": "x45e69fda"}], "children": [{"path": "khan/humanities/art-africa/west-africa/nigeria/ife-uncovered/", "id": "JNmCg3nNi1U", "title": "Ife uncovered", "kind": "Video", "description": "Professor John Picton and metallurgist Paul Craddock discuss the meaning and the making of the sculptures in the exhibition Kingdom of Ife sculptures from West Africa. \u00a9 Trustees of the British Museum", "slug": "ife-uncovered"}, {"path": "khan/humanities/art-africa/west-africa/nigeria/ife-remembered-godfrey/", "id": "gmYPum38T00", "title": "Ife remembered", "kind": "Video", "description": "Godfrey Abeshin, in conversation with curator Hassan Arero, remembers the Ife of his childhood. \u00a9 Trustees of the British Museum", "slug": "ife-remembered-godfrey"}, {"path": "khan/humanities/art-africa/west-africa/nigeria/ikenga/", "id": "kRikHc8U8zI", "title": "Ikenga (Igbo Peoples)", "kind": "Video", "description": "Ikenga, Igbo Peoples, Nigeria, wood (University of Pennsylvania Museum of Archaeology and Anthropology) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "slug": "ikenga"}, {"path": "khan/humanities/art-africa/west-africa/nigeria/olowe-veranda/", "id": "Yc9NJnx58Wg", "title": "Olowe of Ise, Veranda Post (Yoruba people)", "kind": "Video", "description": "Olowe of Ise, Veranda Post, before 1938 (Yoruba people, Nigeria), wood, pigment, 180.3 x 28.6 x 35.6 cm (The Metropolitan Museum of Art) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "slug": "olowe-veranda"}], "in_knowledge_map": false, "description": "The Federal Republic of Nigeria is the most populous nation in Africa and is home to some 500 ethnic groups (and languages) including the Yoruba people. Nigeria has a large Christian population concentrated in the central and southern regions and an equally large Muslim population predominantly in the north and southwest.", "node_slug": "nigeria", "render_type": "Tutorial", "topic_page_url": "/humanities/art-africa/west-africa/nigeria", "extended_slug": "humanities/art-africa/west-africa/nigeria", "kind": "Topic", "slug": "nigeria"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-africa/west-africa/sierra-leone/", "id": "sierra-leone", "hide": false, "title": "Sierra Leone", "child_data": [{"kind": "Article", "id": "xa509f62c"}, {"kind": "Video", "id": "x9370d62b"}, {"kind": "Article", "id": "xa38c462d"}, {"kind": "Video", "id": "x7c908b2a"}, {"kind": "Article", "id": "x9c32fa08"}], "children": [{"path": "khan/humanities/art-africa/west-africa/sierra-leone/sande-bundu/", "id": "FN1qz8tp89g", "title": "Bundu or Sowei Helmet Mask", "kind": "Video", "description": "Bundu\u00a0or Sowei Helmet Mask (Ndoli Jowei), Mende, Nguabu Master (Moyamba district, Sierra Leone), late 19th-early 20th century, wood and pigment, 39.4 x 23.5 x 26 cm (Brooklyn Museum) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "slug": "sande-bundu"}, {"path": "khan/humanities/art-africa/west-africa/sierra-leone/sowei-mask/", "id": "jW8-Ni-MeN4", "title": "Sowei mask: Spirit of Sierra Leone", "kind": "Video", "description": "Unique to the region around Sierra Leone, sowei masks are worn by senior members of the all-female Sande Society during rite-of-passage ceremonies that signify a girl's transition to adulthood.\u00a0\n\nEach mask has an individual personality and is given a name which is revealed in a dream. For many years the name of this mask was lost. However, in a special ceremony in January 2013 members of the Sierra Leonean diaspora community in London gave the mask a new name:\u00a0Gbavo, meaning \u2018crowd-puller\u2019 or \u2018to attract people\u2019s attention\u2019. The newly-named mask was then formally re-presented to the British Museum. \u00a9 Trustees of the British Museum", "slug": "sowei-mask"}], "in_knowledge_map": false, "description": "This tutorial explores the Sowei masks of the female Sande society and the art of the Qisi and Vai peoples.", "node_slug": "sierra-leone", "render_type": "Tutorial", "topic_page_url": "/humanities/art-africa/west-africa/sierra-leone", "extended_slug": "humanities/art-africa/west-africa/sierra-leone", "kind": "Topic", "slug": "sierra-leone"}], "in_knowledge_map": false, "description": "West Africa includes the Cape Verde Islands, Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Mauritania, Niger, Nigeria, the island of Saint Helena, Senegal, Sierra Leone, Sao Tome/Principe and Togo", "node_slug": "west-africa", "render_type": "Topic", "topic_page_url": "/humanities/art-africa/west-africa", "extended_slug": "humanities/art-africa/west-africa", "kind": "Topic", "slug": "west-africa"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-africa/north-a/", "id": "north-a", "hide": false, "title": "North Africa", "child_data": [{"kind": "Topic", "id": "x6118af35"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-africa/north-a/algeria-and-libya/", "id": "algeria-and-libya", "hide": false, "title": "Algeria and Libya", "child_data": [{"kind": "Article", "id": "x4915d874"}, {"kind": "Article", "id": "x657b6741"}, {"kind": "Video", "id": "xfc3f8847"}], "children": [{"path": "khan/humanities/art-africa/north-a/algeria-and-libya/rock-art-tadrart-acacus-unesconhk/", "id": "C_OxZpaOShg", "title": "Rock-Art Sites of Tadrart Acacus (UNESCO/NHK)", "kind": "Video", "description": "On the borders of Tassili N'Ajjer in Algeria, also a World Heritage site, this rocky massif has thousands of cave paintings in very different styles, dating from 12,000 B.C. to A.D. 100. They reflect marked changes in the fauna and flora, and also the different ways of life of the populations that succeeded one another in this region of the Sahara.\n\nSource: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai\nURL: http://whc.unesco.org/en/list/287/", "slug": "rock-art-tadrart-acacus-unesconhk"}], "in_knowledge_map": false, "description": "Algeria is vast nation on the southern coast of the Mediterranean. It is largely desert and is known for its brilliant prehistoric, ancient and Islamic cultures.", "node_slug": "algeria-and-libya", "render_type": "Tutorial", "topic_page_url": "/humanities/art-africa/north-a/algeria-and-libya", "extended_slug": "humanities/art-africa/north-a/algeria-and-libya", "kind": "Topic", "slug": "algeria-and-libya"}], "in_knowledge_map": false, "description": "This region includes Algeria, Chad, Egypt, Libya, Morocco, Sudan, Tunisia, and the Canary and Madeira Islands.", "node_slug": "north-a", "render_type": "Topic", "topic_page_url": "/humanities/art-africa/north-a", "extended_slug": "humanities/art-africa/north-a", "kind": "Topic", "slug": "north-a"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-africa/central-africa/", "id": "central-africa", "hide": false, "title": "Central Africa", "child_data": [{"kind": "Topic", "id": "xf71b2cb6"}, {"kind": "Topic", "id": "x35b36e65"}, {"kind": "Topic", "id": "x06248c64"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-africa/central-africa/cameroon1/", "id": "cameroon1", "hide": false, "title": "Cameroon", "child_data": [{"kind": "Video", "id": "xabed2520"}], "children": [{"path": "khan/humanities/art-africa/central-africa/cameroon1/elephant-mask/", "id": "t-4O17cw9cw", "title": "Elephant Mask, Kuosi Society, Bamileke Peoples, Cameroon", "kind": "Video", "description": "Elephant (Aka) Mask, Kuosi Society, Bamileke Peoples, Grassfields region of Cameroon, 20th century, cloth, beads, raffia, fiber, 146.7 x 52.1 x 29.2 cm (Brooklyn Museum) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "slug": "elephant-mask"}], "in_knowledge_map": false, "description": "Cameroon is home to some 200 languages and numerous ethnic groups. It has a varied landscape of mountains, grasslands and coastline.", "node_slug": "cameroon1", "render_type": "Tutorial", "topic_page_url": "/humanities/art-africa/central-africa/cameroon1", "extended_slug": "humanities/art-africa/central-africa/cameroon1", "kind": "Topic", "slug": "cameroon1"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-africa/central-africa/democratic-republic-of-the-congo/", "id": "democratic-republic-of-the-congo", "hide": false, "title": "Democratic Republic of the Congo", "child_data": [{"kind": "Video", "id": "xdaa92c6d"}, {"kind": "Article", "id": "xbeac45d4"}, {"kind": "Article", "id": "xa5df54bf"}, {"kind": "Article", "id": "xf9515391"}], "children": [{"path": "khan/humanities/art-africa/central-africa/democratic-republic-of-the-congo/female-pwo-mask/", "id": "AVNuN89x090", "title": "Female (pwo) mask, Chokwe people", "kind": "Video", "description": "Female (pwo) mask, Chokwe people, Democratic Republic of Congo, early 20th century, wood, plant fiber, pigment, copper alloy, 39.1 cm high (Smithsonian National Museum of African Art) Speakers: Dr. Peri Klemm and Dr. Beth Harris", "slug": "female-pwo-mask"}], "in_knowledge_map": false, "description": "This large and populous nation is located in the center of the continent. It's climate is tropical and contains dense jungle, mountains, grasslands and the Congo River. More than 200 ethnic groups make the DRC their home including the Chokwe, Kongo, and Kuba peoples.", "node_slug": "democratic-republic-of-the-congo", "render_type": "Tutorial", "topic_page_url": "/humanities/art-africa/central-africa/democratic-republic-of-the-congo", "extended_slug": "humanities/art-africa/central-africa/democratic-republic-of-the-congo", "kind": "Topic", "slug": "democratic-republic-of-the-congo"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-africa/central-africa/gabon-art/", "id": "gabon-art", "hide": false, "title": "Gabon", "child_data": [{"kind": "Video", "id": "xba26ef6d"}], "children": [{"path": "khan/humanities/art-africa/central-africa/gabon-art/fang-reliquary/", "id": "OS4Q5TN8oJU", "title": "Fang Reliquary Figure", "kind": "Video", "description": "Reliquary Guardian Figure (Eyema-o-Byeri), Gabon, Fang peoples, mid 18th to mid 19th century, wood and iron, 58.4 cm high (Brooklyn Museum) Speakers: Dr. Peri Klemm and Dr. Beth Harris", "slug": "fang-reliquary"}], "in_knowledge_map": false, "description": "Gabon is an equatorial nation largely covered by rain forest. National parks comprise some 10 percent of the nation's territory. The Fang are likely the largest ethnic group.", "node_slug": "gabon-art", "render_type": "Tutorial", "topic_page_url": "/humanities/art-africa/central-africa/gabon-art", "extended_slug": "humanities/art-africa/central-africa/gabon-art", "kind": "Topic", "slug": "gabon-art"}], "in_knowledge_map": false, "description": "Central Africa includes Angola, Cameroon, Central African Republic, Chad, Republic of the Congo, Democratic Republic of the Congo, Equatorial Guinea, Gabon, and the island groups S\u00e3o Tom\u00e9 and Pr\u00edncipe.", "node_slug": "central-africa", "render_type": "Topic", "topic_page_url": "/humanities/art-africa/central-africa", "extended_slug": "humanities/art-africa/central-africa", "kind": "Topic", "slug": "central-africa"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-africa/southern-africa/", "id": "southern-africa", "hide": false, "title": "Southern Africa", "child_data": [{"kind": "Topic", "id": "x4e6ac809"}, {"kind": "Topic", "id": "x701e135e"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-africa/southern-africa/zimbabwe/", "id": "Zimbabwe", "hide": false, "title": "Zimbabwe", "child_data": [{"kind": "Video", "id": "xe0f4168a"}], "children": [{"path": "khan/humanities/art-africa/southern-africa/zimbabwe/great-zimbabwe-unesconhk/", "id": "I1KRjQmFEIc", "title": "Great Zimbabwe National Monument (UNESCO/NHK)", "kind": "Video", "description": "The ruins of Great Zimbabwe, the capital of the Queen of Sheba, according to an age-old legend are a unique testimony to the Bantu civilization of the Shona between the 11th and 15th centuries. The city, which covers an area of nearly 80 ha, was an important trading centre and was renowned from the Middle Ages onwards. Source: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai URL: http://whc.unesco.org/en/list/364/", "slug": "great-zimbabwe-unesconhk"}], "in_knowledge_map": false, "description": "Zimbabwe", "node_slug": "Zimbabwe", "render_type": "Tutorial", "topic_page_url": "/humanities/art-africa/southern-africa/Zimbabwe", "extended_slug": "humanities/art-africa/southern-africa/Zimbabwe", "kind": "Topic", "slug": "zimbabwe"}], "in_knowledge_map": false, "description": "Southern Africa includes Angola, Botswana, Lesotho, Madagascar, Malawi, Mauritius, Mozambique, Namibia, South Africa, Swaziland, Tanzania, Zambia and Zimbabwe.", "node_slug": "southern-africa", "render_type": "Topic", "topic_page_url": "/humanities/art-africa/southern-africa", "extended_slug": "humanities/art-africa/southern-africa", "kind": "Topic", "slug": "southern-africa"}], "in_knowledge_map": false, "description": "Discover the diverse arts of Africa from select cultures and time periods on the world\u2019s second largest continent.", "node_slug": "art-africa", "render_type": "Subject", "topic_page_url": "/humanities/art-africa", "extended_slug": "humanities/art-africa", "kind": "Topic", "slug": "art-africa"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-oceania/", "id": "art-oceania", "hide": false, "title": "Art of Oceania", "child_data": [{"kind": "Topic", "id": "x27ff2e91"}, {"kind": "Topic", "id": "xd4633196"}, {"kind": "Topic", "id": "x1cd92b2f"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-oceania/polynesia/", "id": "polynesia", "hide": false, "title": "Polynesia", "child_data": [{"kind": "Article", "id": "x0b46658f"}, {"kind": "Article", "id": "xc5775f5a"}, {"kind": "Article", "id": "x9eb73ff2"}, {"kind": "Article", "id": "x81f92fa8"}, {"kind": "Video", "id": "x3f71b3e1"}, {"kind": "Article", "id": "xb807ed28"}, {"kind": "Article", "id": "xcd29ced8"}, {"kind": "Article", "id": "xcf3edb5f"}, {"kind": "Article", "id": "x7fe89dcc"}], "children": [{"path": "khan/humanities/art-oceania/polynesia/maori-meeting-house/", "id": "hHBaf7PfvaY", "title": "A welcome to a Maori meeting house", "kind": "Video", "description": "Ceremony of blessing for a display of a Maori meeting house in Living and Dying, the Wellcome Trust Gallery, at the British Museum.\nVideo features Natasha McKinney, curator, George Nuku, artist, and Kateia Burrows, Ngati Porou, Aitutaki.\n\nSpeakers in the ceremony: Karl Burrows, Ngati Maru, Te Ati Awa, Whanganui.\n\n\u00a9Trustees of the British Museum", "slug": "maori-meeting-house"}], "in_knowledge_map": false, "description": "The islands of the eastern Pacific are known as Polynesia, from the Greek for \"many islands.\" Set within a triangle formed by Aotearoa (New Zealand) in the south, Hawaii to the north and Rapa Nui (Easter Island) in the east, the Polynesian islands are dotted across the vast eastern Pacific Ocean. Though small and separated by thousands of miles, they share similar environments and were settled by people with a common cultural heritage. The western Polynesian islands of Fiji and Tonga were settled approximately 3,000 years ago, whilst New Zealand was settled as recently as 1200 C.E.", "node_slug": "polynesia", "render_type": "Tutorial", "topic_page_url": "/humanities/art-oceania/polynesia", "extended_slug": "humanities/art-oceania/polynesia", "kind": "Topic", "slug": "polynesia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-oceania/melanesia/", "id": "melanesia", "hide": false, "title": "Melanesia", "child_data": [{"kind": "Article", "id": "x132a1850"}, {"kind": "Article", "id": "xe90b20c6"}, {"kind": "Article", "id": "xaeb6d097"}, {"kind": "Video", "id": "x63ee813a"}, {"kind": "Video", "id": "x969e685a"}, {"kind": "Article", "id": "x29a35416"}], "children": [{"path": "khan/humanities/art-oceania/melanesia/playing-from-memory/", "id": "sz_HYdpOuhY", "title": "Slit Gong (Atingting kon)", "kind": "Video", "description": "Met curator Eric Kjellgren on communication in Slit Gong (Atingting kon) by the Tin Mweleun peoples of Ambrym Island in Vanuatu,\u00a0mid to late 1960s.\n\nThe towering slit gongs of northern Vanuatu are among the largest musical instruments in the world. Found primarily on Ambrym, Malekula, and neighboring islands, they are carved from the trunks of breadfruit trees, which are also an important food source. In each village, a number of gongs, comprising a sort of informal orchestra, stand on the village dancing ground. Gong orchestras are played at major social and religious events such as initiations, funerals, and dances. When playing, the musician stands in front of the gong and strikes the lip of the slit with a clublike wooden beater. As the gong ensemble is played, rhythms of immense variety and complexity can be produced by the carefully coordinated actions of multiple drummers.\n\nView this work on metmuseum.org.\u00a0\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "playing-from-memory"}, {"path": "khan/humanities/art-oceania/melanesia/buk-torres/", "id": "3ntQz5vxFec", "title": "Mask (Buk), Torres Strait, Mabuiag Island", "kind": "Video", "description": "Mask (Buk), Torres Strait, Mabuiag Island, mid to late 19th century,turtle shell, wood, cassowary feathers, fiber, resin, shell, paint, 21 1/2 inches high (The Metropolitan Museum of Art) Speakers: Dr. Peri Klemm and Dr. Beth Harris", "slug": "buk-torres"}], "in_knowledge_map": false, "description": "To the north and east of Australia lie the islands known as Melanesia. These islands form one of the most culturally complex regions of the entire world, with 1,293 languages spoken across the Solomon Islands, Vanuatu, New Caledonia and the island of New Guinea (politically divided into Indonesia\u2019s West Papua Province and the nation of Papua New Guinea). It is also a region of great antiquity. New Guinea has been settled for around 45,000 years, the Solomon Islands for 35,000 years, and Vanuatu and New Caledonia for about 4,000.", "node_slug": "melanesia", "render_type": "Tutorial", "topic_page_url": "/humanities/art-oceania/melanesia", "extended_slug": "humanities/art-oceania/melanesia", "kind": "Topic", "slug": "melanesia"}], "in_knowledge_map": false, "description": "Oceania is a vast area of the Pacific Ocean that includes the island regions of Melanesia, Micronesia, and Polynesia.", "node_slug": "art-oceania", "render_type": "Subject", "topic_page_url": "/humanities/art-oceania", "extended_slug": "humanities/art-oceania", "kind": "Topic", "slug": "art-oceania"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/humanities/art-history-for-teachers/", "id": "art-history-for-teachers", "hide": false, "title": "For teachers", "child_data": [{"kind": "Topic", "id": "xd8a550cd"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/humanities/art-history-for-teachers/course-materials/", "id": "course-materials", "hide": false, "title": "Course materials", "child_data": [{"kind": "Article", "id": "x40a48f80"}, {"kind": "Article", "id": "xd85f2b46"}, {"kind": "Article", "id": "x6d8292e0"}, {"kind": "Article", "id": "xfcf6f68c"}, {"kind": "Article", "id": "xb02dab7e"}, {"kind": "Video", "id": "x13ae0bde"}], "children": [{"path": "khan/humanities/art-history-for-teachers/course-materials/using-smarthistory/", "id": "-y90WYn8nzk", "title": "Art history (Smarthistory) on Khanacademy.org", "kind": "Video", "slug": "using-smarthistory"}], "in_knowledge_map": false, "description": "These syllabi and sample discussion questions are for the use of instructors who are encouraged to build on and adapt them for their own classes. They can also be used by individual learners seeking a pathway through the art history content on Khan Academy akin to an introductory college-level survey course.", "node_slug": "course-materials", "render_type": "Tutorial", "topic_page_url": "/humanities/art-history-for-teachers/course-materials", "extended_slug": "humanities/art-history-for-teachers/course-materials", "kind": "Topic", "slug": "course-materials"}], "in_knowledge_map": false, "description": "Look here for syllabi, sample discussion questions, and other useful resources for teachers.", "node_slug": "art-history-for-teachers", "render_type": "Subject", "topic_page_url": "/humanities/art-history-for-teachers", "extended_slug": "humanities/art-history-for-teachers", "kind": "Topic", "slug": "art-history-for-teachers"}], "in_knowledge_map": false, "description": "", "node_slug": "humanities", "render_type": "Domain", "topic_page_url": "/humanities", "extended_slug": "humanities", "kind": "Topic", "slug": "humanities"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/computing/", "id": "computing", "hide": false, "title": "Computing", "child_data": [{"kind": "Topic", "id": "xffde7c31"}, {"kind": "Topic", "id": "x301707a0"}, {"kind": "Topic", "id": "x54f76d4b"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/computing/computer-programming/", "id": "computer-programming", "hide": false, "title": "Computer programming", "child_data": [{"kind": "Topic", "id": "x05187c3c"}, {"kind": "Topic", "id": "x7441c73b"}, {"kind": "Topic", "id": "xcffdaa1f"}, {"kind": "Topic", "id": "x89af0e82"}, {"kind": "Topic", "id": "xc9115e5d"}, {"kind": "Topic", "id": "xb254f8dc"}, {"kind": "Topic", "id": "x0a7e5897"}, {"kind": "Topic", "id": "x7d10e7ab"}, {"kind": "Topic", "id": "xc7cc38f7"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/computing/computer-programming/programming/", "id": "programming", "hide": false, "title": "Intro to JS: Drawing & Animation", "child_data": [{"kind": "Topic", "id": "x8edeb601"}, {"kind": "Topic", "id": "xf53d7aa7"}, {"kind": "Topic", "id": "x2d4b3800"}, {"kind": "Topic", "id": "x8686923b"}, {"kind": "Topic", "id": "x3312fbc8"}, {"kind": "Topic", "id": "x42259a14"}, {"kind": "Topic", "id": "xb0180d93"}, {"kind": "Topic", "id": "xc4ab8747"}, {"kind": "Topic", "id": "x7323ca45"}, {"kind": "Topic", "id": "xbdc5ca9e"}, {"kind": "Topic", "id": "x2f8e35eb"}, {"kind": "Topic", "id": "x2087c5d4"}, {"kind": "Topic", "id": "x54f8c602"}, {"kind": "Topic", "id": "x611e8e74"}, {"kind": "Topic", "id": "x9a11a504"}, {"kind": "Topic", "id": "x8d3377f2"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/programming/intro-to-programming/", "id": "intro-to-programming", "hide": false, "title": "Intro to programming", "child_data": [{"kind": "Video", "id": "x7aa228af"}, {"kind": "Article", "id": "x39a46841"}], "children": [{"path": "khan/computing/computer-programming/programming/intro-to-programming/programming-intro/", "id": "FCMxA3m_Imc", "title": "What is Programming?", "kind": "Video", "slug": "programming-intro"}], "in_knowledge_map": false, "description": "If you've never been here before, check out this introductory video first. Then get coding!", "node_slug": "intro-to-programming", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/programming/intro-to-programming", "extended_slug": "computing/computer-programming/programming/intro-to-programming", "kind": "Topic", "slug": "intro-to-programming"}, {"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/programming/coloring/", "id": "coloring", "hide": false, "title": "Coloring", "child_data": [{"kind": "Scratchpad", "id": "844038377"}, {"kind": "Scratchpad", "id": "1931511584"}, {"kind": "Scratchpad", "id": "1931295721"}, {"kind": "Video", "id": "xa84559de"}, {"kind": "Scratchpad", "id": "2510603406"}], "children": [{"path": "khan/computing/computer-programming/programming/coloring/the-power-of-the-docs/", "id": "If3KlMxbtcc", "title": "The Power of the Docs", "kind": "Video", "slug": "the-power-of-the-docs"}], "in_knowledge_map": false, "description": "We'll show you how to color and outline your shapes!", "node_slug": "coloring", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/programming/coloring", "extended_slug": "computing/computer-programming/programming/coloring", "kind": "Topic", "slug": "coloring"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-programming/programming/variables/", "id": "variables", "hide": false, "title": "Variables", "child_data": [{"kind": "Scratchpad", "id": "825241936"}, {"kind": "Exercise", "id": "xaa1aa46a"}, {"kind": "Scratchpad", "id": "1912068525"}, {"kind": "Scratchpad", "id": "848607462"}, {"kind": "Scratchpad", "id": "2039979798"}, {"kind": "Article", "id": "x7b411616"}], "children": [{"path": "khan/computing/computer-programming/programming/variables/exercise-intro-to-variables/", "id": "exercise--intro-to-variables", "title": "Quiz: Variables", "slug": "exercise-intro-to-variables", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We'll cover how to use variables to hold values, animate your drawings, and more.", "node_slug": "variables", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/programming/variables", "extended_slug": "computing/computer-programming/programming/variables", "kind": "Topic", "slug": "variables"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-programming/programming/resizing-with-variables/", "id": "resizing-with-variables", "hide": false, "title": "Bonus: Resizing with variables", "child_data": [{"kind": "Article", "id": "xe92b9d1d"}, {"kind": "Scratchpad", "id": "6658231843815424"}, {"kind": "Exercise", "id": "xaae103de"}, {"kind": "Scratchpad", "id": "5470148512972800"}, {"kind": "Scratchpad", "id": "5069965890945024"}], "children": [{"path": "khan/computing/computer-programming/programming/resizing-with-variables/quiz-use-variable-expressions/", "id": "quiz--use-variable-expressions", "title": "Quiz: Variable Expressions", "slug": "quiz-use-variable-expressions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to use variable expressions to resize parts of your drawing relative to other parts. (This requires a bit more math, so if you don't feel you have a good grasp of fractions yet, you can skip over this.)", "node_slug": "resizing-with-variables", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/programming/resizing-with-variables", "extended_slug": "computing/computer-programming/programming/resizing-with-variables", "kind": "Topic", "slug": "resizing-with-variables"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-programming/programming/looping/", "id": "looping", "hide": false, "title": "Looping", "child_data": [{"kind": "Scratchpad", "id": "2081388243"}, {"kind": "Exercise", "id": "x7cde8e67"}, {"kind": "Scratchpad", "id": "2145303404"}, {"kind": "Scratchpad", "id": "2785233642"}, {"kind": "Scratchpad", "id": "6106069621276672"}, {"kind": "Scratchpad", "id": "6684386237874176"}, {"kind": "Scratchpad", "id": "5047809057226752"}, {"kind": "Scratchpad", "id": "4838213478776832"}, {"kind": "Article", "id": "xcf1d241d"}, {"kind": "Scratchpad", "id": "5322961523310592"}], "children": [{"path": "khan/computing/computer-programming/programming/looping/review-loops/", "id": "review-loops", "title": "Quiz: While Loops", "slug": "review-loops", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Repeating something over-and-over? Loops are here to help!", "node_slug": "looping", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/programming/looping", "extended_slug": "computing/computer-programming/programming/looping", "kind": "Topic", "slug": "looping"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-programming/programming/writing-clean-code/", "id": "writing-clean-code", "hide": false, "title": "Writing clean code", "child_data": [{"kind": "Scratchpad", "id": "2048804437"}, {"kind": "Scratchpad", "id": "1981573965"}, {"kind": "Exercise", "id": "x516854e9"}], "children": [{"path": "khan/computing/computer-programming/programming/writing-clean-code/quiz-clean-code/", "id": "quiz--clean-code", "title": "Quiz: Clean code", "description": "Check if you have a good idea of what makes JavaScript code readable and understandable.", "slug": "quiz-clean-code", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to write JavaScript code that is easy to read and understand, with good use of indentation, spacing, naming, and comments.", "node_slug": "writing-clean-code", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/programming/writing-clean-code", "extended_slug": "computing/computer-programming/programming/writing-clean-code", "kind": "Topic", "slug": "writing-clean-code"}, {"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/programming/good-practices/", "id": "good-practices", "hide": false, "title": "Becoming a better programmer", "child_data": [{"kind": "Article", "id": "xcfdf6381"}, {"kind": "Scratchpad", "id": "6392019672891392"}, {"kind": "Article", "id": "xec13d425"}, {"kind": "Video", "id": "x6eef6a3f"}], "children": [{"path": "khan/computing/computer-programming/programming/good-practices/help-others-learn-programming/", "id": "RamzvjMF3rc", "title": "Help others learn!", "kind": "Video", "slug": "help-others-learn-programming"}], "in_knowledge_map": false, "description": "Now that you understand the basics of programming, learn techniques that will help you be more productive and write more beautiful code.", "node_slug": "good-practices", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/programming/good-practices", "extended_slug": "computing/computer-programming/programming/good-practices", "kind": "Topic", "slug": "good-practices"}], "in_knowledge_map": false, "description": "Learn how to use the JavaScript language and the ProcessingJS library to create fun drawings and animations.", "node_slug": "programming", "render_type": "Topic", "topic_page_url": "/computing/computer-programming/programming", "extended_slug": "computing/computer-programming/programming", "kind": "Topic", "slug": "programming"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/computing/computer-programming/html-css/", "id": "html-css", "hide": false, "title": "Intro to HTML/CSS: Making webpages", "child_data": [{"kind": "Topic", "id": "xefc0e88a"}, {"kind": "Topic", "id": "xae5108e8"}, {"kind": "Topic", "id": "x93850788"}, {"kind": "Topic", "id": "x10c7b82a"}, {"kind": "Topic", "id": "x6787034c"}, {"kind": "Topic", "id": "x2e46f213"}, {"kind": "Topic", "id": "x3c59ea3c"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/html-css/intro-to-html/", "id": "intro-to-html", "hide": false, "title": "Intro to HTML", "child_data": [{"kind": "Video", "id": "x9b5f739f"}, {"kind": "Scratchpad", "id": "5012727132323840"}, {"kind": "Scratchpad", "id": "6198615379017728"}, {"kind": "Scratchpad", "id": "5955076083679232"}, {"kind": "Scratchpad", "id": "5688482121121792"}, {"kind": "Scratchpad", "id": "5811221262761984"}, {"kind": "Scratchpad", "id": "6244086130671616"}, {"kind": "Scratchpad", "id": "6091331232595968"}, {"kind": "Scratchpad", "id": "6630427901296640"}], "children": [{"path": "khan/computing/computer-programming/html-css/intro-to-html/making-webpages-intro/", "id": "jHPr-CuvHhs", "title": "Welcome to the web!", "kind": "Video", "slug": "making-webpages-intro"}], "in_knowledge_map": false, "description": "Learn what HTML is and how to make a webpage with marked up text and images.", "node_slug": "intro-to-html", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-css/intro-to-html", "extended_slug": "computing/computer-programming/html-css/intro-to-html", "kind": "Topic", "slug": "intro-to-html"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-programming/html-css/intro-to-css/", "id": "intro-to-css", "hide": false, "title": "Intro to CSS", "child_data": [{"kind": "Scratchpad", "id": "4918766136983552"}, {"kind": "Scratchpad", "id": "4909130071670784"}, {"kind": "Scratchpad", "id": "5361460026015744"}, {"kind": "Scratchpad", "id": "6081336571068416"}, {"kind": "Scratchpad", "id": "5025944629936128"}, {"kind": "Scratchpad", "id": "4670903452696576"}, {"kind": "Exercise", "id": "x23a2cc94"}, {"kind": "Scratchpad", "id": "5255589914738688"}], "children": [{"path": "khan/computing/computer-programming/html-css/intro-to-css/quiz-simple-css-selectors/", "id": "quiz--simple-css-selectors", "title": "Quiz: Simple CSS selectors", "description": "How well do you know element, class, and id selectors? Find out!", "slug": "quiz-simple-css-selectors", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to write simple CSS rules, to select based on element, class, or ID, and change the colors of your page.", "node_slug": "intro-to-css", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-css/intro-to-css", "extended_slug": "computing/computer-programming/html-css/intro-to-css", "kind": "Topic", "slug": "intro-to-css"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/computing/computer-programming/html-css/css-text-properties/", "id": "css-text-properties", "hide": false, "title": "CSS text properties", "child_data": [{"kind": "Video", "id": "x20d5d0eb"}, {"kind": "Scratchpad", "id": "6314802575310848"}, {"kind": "Scratchpad", "id": "5492488954707968"}, {"kind": "Scratchpad", "id": "6408073213378560"}, {"kind": "Scratchpad", "id": "6362220301910016"}, {"kind": "Scratchpad", "id": "4875084255985664"}, {"kind": "Scratchpad", "id": "5568645130616832"}, {"kind": "Scratchpad", "id": "5525522508677120"}, {"kind": "Exercise", "id": "xeb00c49b"}, {"kind": "Scratchpad", "id": "6486573584744448"}, {"kind": "Scratchpad", "id": "4863952709484544"}], "children": [{"path": "khan/computing/computer-programming/html-css/css-text-properties/css-zen-garden/", "id": "yTOS61GFq0g", "title": "CSS Zen Garden", "kind": "Video", "slug": "css-zen-garden"}, {"path": "khan/computing/computer-programming/html-css/css-text-properties/quiz-text-properties/", "id": "quiz--text-properties", "title": "Quiz: text properties", "description": "Practice your knowledge of CSS text properties.", "slug": "quiz-text-properties", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to style your text, like font families, size, spacing, and alignment.", "node_slug": "css-text-properties", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-css/css-text-properties", "extended_slug": "computing/computer-programming/html-css/css-text-properties", "kind": "Topic", "slug": "css-text-properties"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/computing/computer-programming/html-css/css-layout-properties/", "id": "css-layout-properties", "hide": false, "title": "CSS Layout", "child_data": [{"kind": "Scratchpad", "id": "5699382839345152"}, {"kind": "Scratchpad", "id": "5987626911006720"}, {"kind": "Scratchpad", "id": "5631904855621632"}, {"kind": "Scratchpad", "id": "5422392135647232"}, {"kind": "Scratchpad", "id": "6200339767492608"}, {"kind": "Scratchpad", "id": "4676223608553472"}, {"kind": "Scratchpad", "id": "4615703178248192"}, {"kind": "Scratchpad", "id": "5153121644052480"}, {"kind": "Video", "id": "x3f1a907e"}, {"kind": "Scratchpad", "id": "4635563442569216"}, {"kind": "Scratchpad", "id": "5435078412075008"}, {"kind": "Exercise", "id": "x46958c79"}, {"kind": "Scratchpad", "id": "6750832828350464"}], "children": [{"path": "khan/computing/computer-programming/html-css/css-layout-properties/css-in-the-wild-google-maps/", "id": "7f-LsuAnLMA", "title": "CSS in the wild: Google Maps", "kind": "Video", "slug": "css-in-the-wild-google-maps"}, {"path": "khan/computing/computer-programming/html-css/css-layout-properties/quiz-css-layout/", "id": "quiz--css-layout", "title": "Quiz: CSS Layout", "description": "Practice CSS layout concepts and properties.", "slug": "quiz-css-layout", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to use the HTML span and div elements with CSS properties like position and float to change the layout of your webpages.", "node_slug": "css-layout-properties", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-css/css-layout-properties", "extended_slug": "computing/computer-programming/html-css/css-layout-properties", "kind": "Topic", "slug": "css-layout-properties"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-programming/html-css/more-css-selectors/", "id": "more-css-selectors", "hide": false, "title": "More CSS selectors", "child_data": [{"kind": "Scratchpad", "id": "4939299519987712"}, {"kind": "Scratchpad", "id": "4574192365469696"}, {"kind": "Scratchpad", "id": "5418858455498752"}, {"kind": "Scratchpad", "id": "6401534587043840"}, {"kind": "Scratchpad", "id": "6374633634004992"}, {"kind": "Scratchpad", "id": "4757342446157824"}, {"kind": "Scratchpad", "id": "6211781778472960"}, {"kind": "Scratchpad", "id": "5180385597325312"}, {"kind": "Scratchpad", "id": "4526038917054464"}, {"kind": "Scratchpad", "id": "4750409140011008"}, {"kind": "Exercise", "id": "x31250993"}], "children": [{"path": "khan/computing/computer-programming/html-css/more-css-selectors/quiz-css-specificity-rules/", "id": "quiz--css-specificity-rules", "title": "Quiz: CSS specificity", "description": "Test your knowledge of CSS specificity rules.", "slug": "quiz-css-specificity-rules", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn more complex selectors- using multiple classes, combing elements with classes, descendant selectors, grouped selectors, and dynamic pseudo-classes.", "node_slug": "more-css-selectors", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-css/more-css-selectors", "extended_slug": "computing/computer-programming/html-css/more-css-selectors", "kind": "Topic", "slug": "more-css-selectors"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/computing/computer-programming/html-css/html-css-further-learning/", "id": "html-css-further-learning", "hide": false, "title": "Further learning", "child_data": [{"kind": "Video", "id": "x375b2a8b"}, {"kind": "Exercise", "id": "x488fb047"}, {"kind": "Article", "id": "xd2d98915"}], "children": [{"path": "khan/computing/computer-programming/html-css/html-css-further-learning/html-validation/", "id": "qrU3ghYJjEw", "title": "HTML validation", "kind": "Video", "description": "Learn how to validate your webpages with the W3C validator service.", "slug": "html-validation"}, {"path": "khan/computing/computer-programming/html-css/html-css-further-learning/quiz-validate-this-html/", "id": "quiz--validate-this-html", "title": "Quiz: Validate this HTML", "description": "Try validating small HTML pages and figure out what's wrong.", "slug": "quiz-validate-this-html", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What can you do to keep learning HTML and CSS?", "node_slug": "html-css-further-learning", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-css/html-css-further-learning", "extended_slug": "computing/computer-programming/html-css/html-css-further-learning", "kind": "Topic", "slug": "html-css-further-learning"}], "in_knowledge_map": false, "description": "Learn how to use HTML and CSS to make webpages. HTML is the markup language that you surround content with, to tell browsers about headings, lists, tables, etc. CSS is the stylesheet language that you style the page with, to tell browsers to change the color, font, layout, and more.", "node_slug": "html-css", "render_type": "Topic", "topic_page_url": "/computing/computer-programming/html-css", "extended_slug": "computing/computer-programming/html-css", "kind": "Topic", "slug": "html-css"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/computing/computer-programming/sql/", "id": "sql", "hide": false, "title": "Intro to SQL: Querying and managing data", "child_data": [{"kind": "Topic", "id": "x8c9afe49"}, {"kind": "Topic", "id": "x65157cda"}, {"kind": "Topic", "id": "x09cfa153"}, {"kind": "Topic", "id": "xa052ff48"}, {"kind": "Topic", "id": "x587ded53"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/sql/sql-basics/", "id": "sql-basics", "hide": false, "title": "SQL basics", "child_data": [{"kind": "Video", "id": "xe44b888f"}, {"kind": "Scratchpad", "id": "6503853165117440"}, {"kind": "Scratchpad", "id": "4845950473601024"}, {"kind": "Scratchpad", "id": "6003599625945088"}, {"kind": "Scratchpad", "id": "6304653454344192"}, {"kind": "Scratchpad", "id": "6288707168763904"}, {"kind": "Scratchpad", "id": "5826099759284224"}, {"kind": "Video", "id": "xab93c62d"}, {"kind": "Scratchpad", "id": "5327101046816768"}], "children": [{"path": "khan/computing/computer-programming/sql/sql-basics/welcome-to-sql/", "id": "IXycPq7MnwE", "title": "Welcome to SQL", "kind": "Video", "slug": "welcome-to-sql"}, {"path": "khan/computing/computer-programming/sql/sql-basics/s-q-l-or-sequel/", "id": "mclGRkSprJY", "title": "S-Q-L or SEQUEL?", "kind": "Video", "description": "How is it pronounced? Why? Let's discuss...", "slug": "s-q-l-or-sequel"}], "in_knowledge_map": false, "description": "We'll show you the basics of creating tables and selecting data in various different ways.", "node_slug": "sql-basics", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/sql/sql-basics", "extended_slug": "computing/computer-programming/sql/sql-basics", "kind": "Topic", "slug": "sql-basics"}], "in_knowledge_map": false, "description": "Learn how to use SQL to store, query, and manipulate data. SQL is a special-purpose programming language designed for managing data in a relational database, and is used by a huge number of apps and organizations.", "node_slug": "sql", "render_type": "Topic", "topic_page_url": "/computing/computer-programming/sql", "extended_slug": "computing/computer-programming/sql", "kind": "Topic", "slug": "sql"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/computing/computer-programming/programming-games-visualizations/", "id": "programming-games-visualizations", "hide": false, "title": "Advanced JS: Games & Visualizations", "child_data": [{"kind": "Topic", "id": "x1dd579f7"}, {"kind": "Topic", "id": "x7d37566a"}, {"kind": "Topic", "id": "x11e9f299"}, {"kind": "Topic", "id": "x896e6e88"}, {"kind": "Topic", "id": "xfd60fa97"}, {"kind": "Topic", "id": "xb5ef4c84"}, {"kind": "Topic", "id": "xbf6ce853"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/programming-games-visualizations/intro-games-visualizations/", "id": "intro-games-visualizations", "hide": false, "title": "Intro to Games & Visualizations", "child_data": [{"kind": "Video", "id": "x25e24ff2"}], "children": [{"path": "khan/computing/computer-programming/programming-games-visualizations/intro-games-visualizations/welcome-games-visualizations/", "id": "4VqHGULLA4o", "title": "Intro to Games and Visualizations", "kind": "Video", "slug": "welcome-games-visualizations"}], "in_knowledge_map": false, "description": "A quick tour of the many components of games and visualizations, demonstrated by some of our favorite programs.", "node_slug": "intro-games-visualizations", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/programming-games-visualizations/intro-games-visualizations", "extended_slug": "computing/computer-programming/programming-games-visualizations/intro-games-visualizations", "kind": "Topic", "slug": "intro-games-visualizations"}], "in_knowledge_map": false, "description": "Once you've taken Intro to JS, go here to learn techniques to help you make multi-scene programs, 3d graphics, button menus, and scored games.", "node_slug": "programming-games-visualizations", "render_type": "Topic", "topic_page_url": "/computing/computer-programming/programming-games-visualizations", "extended_slug": "computing/computer-programming/programming-games-visualizations", "kind": "Topic", "slug": "programming-games-visualizations"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/computing/computer-programming/programming-natural-simulations/", "id": "programming-natural-simulations", "hide": false, "title": "Advanced JS: Natural Simulations", "child_data": [{"kind": "Topic", "id": "xa88044a5"}, {"kind": "Topic", "id": "x06b80b68"}, {"kind": "Topic", "id": "xad887cfc"}, {"kind": "Topic", "id": "x8679955c"}, {"kind": "Topic", "id": "xddaab832"}, {"kind": "Topic", "id": "x3be54d3a"}, {"kind": "Topic", "id": "x68193720"}, {"kind": "Topic", "id": "xee1dab0c"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/programming-natural-simulations/intro-natural-simulations/", "id": "intro-natural-simulations", "hide": false, "title": "Intro to Natural Simulations", "child_data": [{"kind": "Video", "id": "xc284b302"}], "children": [{"path": "khan/computing/computer-programming/programming-natural-simulations/intro-natural-simulations/welcome-natural-simulations/", "id": "LMfPceMzLWg", "title": "Welcome to Natural Simulations", "kind": "Video", "slug": "welcome-natural-simulations"}], "in_knowledge_map": false, "description": "", "node_slug": "intro-natural-simulations", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/programming-natural-simulations/intro-natural-simulations", "extended_slug": "computing/computer-programming/programming-natural-simulations/intro-natural-simulations", "kind": "Topic", "slug": "intro-natural-simulations"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-programming/programming-natural-simulations/programming-angular-movement/", "id": "programming-angular-movement", "hide": false, "title": "Angular Movement", "child_data": [{"kind": "Article", "id": "x026c6d2e"}, {"kind": "Scratchpad", "id": "5047570245091328"}, {"kind": "Article", "id": "xbbba5b5f"}, {"kind": "Scratchpad", "id": "4724656551493632"}, {"kind": "Article", "id": "x408a37dc"}, {"kind": "Exercise", "id": "592471461"}, {"kind": "Article", "id": "x70ac0811"}, {"kind": "Scratchpad", "id": "5105550961410048"}, {"kind": "Article", "id": "xf02483ce"}, {"kind": "Scratchpad", "id": "5773335093837824"}, {"kind": "Scratchpad", "id": "4731110142509056"}], "children": [{"path": "khan/computing/computer-programming/programming-natural-simulations/programming-angular-movement/trigonometry_05/", "id": "trigonometry_0.5", "title": "Trigonometry 0.5", "slug": "trigonometry_05", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "programming-angular-movement", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/programming-natural-simulations/programming-angular-movement", "extended_slug": "computing/computer-programming/programming-natural-simulations/programming-angular-movement", "kind": "Topic", "slug": "programming-angular-movement"}], "in_knowledge_map": false, "description": "Once you've taken Intro to JS, you can go through this course to learn how to combine JS, ProcessingJS, and mathematical concepts to simulate nature in your programs. This course is a derivative of \"The Nature of Code\" book by Daniel Shiffman (natureofcode.com), used under CC BY-NC.", "node_slug": "programming-natural-simulations", "render_type": "Topic", "topic_page_url": "/computing/computer-programming/programming-natural-simulations", "extended_slug": "computing/computer-programming/programming-natural-simulations", "kind": "Topic", "slug": "programming-natural-simulations"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/computing/computer-programming/html-css-js/", "id": "html-css-js", "hide": false, "title": "HTML/JS: Making webpages interactive", "child_data": [{"kind": "Topic", "id": "x44a77658"}, {"kind": "Topic", "id": "xbf6a822c"}, {"kind": "Topic", "id": "x073b9367"}, {"kind": "Topic", "id": "xc9580951"}, {"kind": "Topic", "id": "xb5e420c6"}, {"kind": "Topic", "id": "xc81e0411"}, {"kind": "Topic", "id": "xda5f830f"}, {"kind": "Topic", "id": "x5c00331a"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/computing/computer-programming/html-css-js/html-css-js-intro/", "id": "html-css-js-intro", "hide": false, "title": "Get ready to make your webpages interactive", "child_data": [{"kind": "Video", "id": "x103d3952"}, {"kind": "Article", "id": "x5ab7a345"}, {"kind": "Exercise", "id": "xcfabb252"}, {"kind": "Article", "id": "x97251297"}, {"kind": "Exercise", "id": "xc67a93dc"}], "children": [{"path": "khan/computing/computer-programming/html-css-js/html-css-js-intro/welcome-to-making-webpages-interactive/", "id": "c-szOdzJiWM", "title": "Welcome to making webpages interactive", "kind": "Video", "slug": "welcome-to-making-webpages-interactive"}, {"path": "khan/computing/computer-programming/html-css-js/html-css-js-intro/quiz-html-css-recap/", "id": "quiz--html-css-recap", "title": "Quiz: HTML/CSS recap", "description": "Make sure you remember enough about HTML/CSS before you keep going.", "slug": "quiz-html-css-recap", "kind": "Exercise"}, {"path": "khan/computing/computer-programming/html-css-js/html-css-js-intro/quiz-javascript-recap/", "id": "quiz--javascript-recap", "title": "Quiz: JavaScript recap", "description": "Make sure you remember enough JavaScript before you keep going.", "slug": "quiz-javascript-recap", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Are you ready to learn how to make your webpages interactive with HTML, JavaScript, and the DOM API? You'll find out with our review quizzes in this tutorial. Get pumped!", "node_slug": "html-css-js-intro", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-css-js/html-css-js-intro", "extended_slug": "computing/computer-programming/html-css-js/html-css-js-intro", "kind": "Topic", "slug": "html-css-js-intro"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-programming/html-css-js/js-and-the-dom/", "id": "js-and-the-dom", "hide": false, "title": "JS and the DOM", "child_data": [{"kind": "Scratchpad", "id": "5594212406657024"}, {"kind": "Scratchpad", "id": "5583460839456768"}, {"kind": "Scratchpad", "id": "6517936014229504"}, {"kind": "Exercise", "id": "x2085083e"}], "children": [{"path": "khan/computing/computer-programming/html-css-js/js-and-the-dom/quiz-what-is-dom/", "id": "quiz--what-is-dom", "title": "Quiz: What is DOM?", "description": "Check if you understood our quick intro to the DOM.", "slug": "quiz-what-is-dom", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to use JavaScript to control the \"DOM\" (Document Object Model) of a webpage.", "node_slug": "js-and-the-dom", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-css-js/js-and-the-dom", "extended_slug": "computing/computer-programming/html-css-js/js-and-the-dom", "kind": "Topic", "slug": "js-and-the-dom"}, {"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/html-css-js/html-js-dom-events/", "id": "html-js-dom-events", "hide": false, "title": "DOM events", "child_data": [{"kind": "Video", "id": "xcbe81634"}, {"kind": "Scratchpad", "id": "5260742883016704"}, {"kind": "Scratchpad", "id": "5373438613782528"}, {"kind": "Article", "id": "x2a280300"}, {"kind": "Scratchpad", "id": "6513034332471296"}, {"kind": "Scratchpad", "id": "6338557130833920"}, {"kind": "Scratchpad", "id": "4517908223623168"}, {"kind": "Scratchpad", "id": "4564884149501952"}, {"kind": "Scratchpad", "id": "4516862382309376"}, {"kind": "Article", "id": "x7bf86932"}], "children": [{"path": "khan/computing/computer-programming/html-css-js/html-js-dom-events/making-webpages-interactive-with-events/", "id": "2pE7GUzW6-4", "title": "Making webpages interactive with events", "kind": "Video", "slug": "making-webpages-interactive-with-events"}], "in_knowledge_map": false, "description": "Learn how to use the DOM API from JavaScript to make your webpage react to user events, like clicking, scrolling, and entering fields in forms.", "node_slug": "html-js-dom-events", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-css-js/html-js-dom-events", "extended_slug": "computing/computer-programming/html-css-js/html-js-dom-events", "kind": "Topic", "slug": "html-js-dom-events"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-programming/html-css-js/using-js-libraries-in-your-webpage/", "id": "using-js-libraries-in-your-webpage", "hide": false, "title": "Using JS libraries in your webpage", "child_data": [{"kind": "Article", "id": "xcd601ed3"}, {"kind": "Scratchpad", "id": "6211680532037632"}, {"kind": "Article", "id": "x59601445"}, {"kind": "Exercise", "id": "x40785e86"}, {"kind": "Article", "id": "x4e6daf99"}, {"kind": "Article", "id": "x6f3c4947"}], "children": [{"path": "khan/computing/computer-programming/html-css-js/using-js-libraries-in-your-webpage/quiz-js-libraries/", "id": "quiz--js-libraries", "title": "Quiz: JS libraries", "description": "Check your knowledge of JS libraries.", "slug": "quiz-js-libraries", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to include JS libraries on your webpage, so that you can use functionality built by other web developers.", "node_slug": "using-js-libraries-in-your-webpage", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-css-js/using-js-libraries-in-your-webpage", "extended_slug": "computing/computer-programming/html-css-js/using-js-libraries-in-your-webpage", "kind": "Topic", "slug": "using-js-libraries-in-your-webpage"}], "in_knowledge_map": false, "description": "Once you've taken both Intro to JS and Intro to HTML/CSS, take this course to learn how use HTML/CSS with the JavaScript DOM API to make your webpages interactive.", "node_slug": "html-css-js", "render_type": "Topic", "topic_page_url": "/computing/computer-programming/html-css-js", "extended_slug": "computing/computer-programming/html-css-js", "kind": "Topic", "slug": "html-css-js"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/computing/computer-programming/html-js-jquery/", "id": "html-js-jquery", "hide": false, "title": "HTML/JS: Making webpages interactive with jQuery", "child_data": [{"kind": "Topic", "id": "x5565c421"}, {"kind": "Topic", "id": "x9e1ce33d"}, {"kind": "Topic", "id": "xc3c269b0"}, {"kind": "Topic", "id": "xf4b40035"}, {"kind": "Topic", "id": "x3ebb01eb"}, {"kind": "Topic", "id": "x74d9f5a2"}, {"kind": "Topic", "id": "x3e694126"}, {"kind": "Topic", "id": "x14b5a3a3"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/html-js-jquery/jquery-intro/", "id": "jquery-intro", "hide": false, "title": "Welcome to jQuery", "child_data": [{"kind": "Video", "id": "xfaa52c00"}, {"kind": "Video", "id": "x03ad2b72"}, {"kind": "Article", "id": "xe3aba850"}, {"kind": "Scratchpad", "id": "5135118780989440"}, {"kind": "Scratchpad", "id": "4889578159865856"}], "children": [{"path": "khan/computing/computer-programming/html-js-jquery/jquery-intro/jquery-meet-the-inventor/", "id": "4NYF_Y3rTbk", "title": "From the inventor: Welcome!", "kind": "Video", "description": "Meet John Resig, the developer that invented jQuery and now works as an engineer at Khan Academy.", "slug": "jquery-meet-the-inventor"}, {"path": "khan/computing/computer-programming/html-js-jquery/jquery-intro/what-is-jquery/", "id": "T2mFyPxL-fU", "title": "What is jQuery?", "kind": "Video", "description": "Want to keep learning? Keep going with our course on Khan Academy!", "slug": "what-is-jquery"}], "in_knowledge_map": false, "description": "Get an overview of the jQuery library, meet the inventor, and try using jQuery in a webpage.", "node_slug": "jquery-intro", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-js-jquery/jquery-intro", "extended_slug": "computing/computer-programming/html-js-jquery/jquery-intro", "kind": "Topic", "slug": "jquery-intro"}, {"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/html-js-jquery/jquery-dom-access/", "id": "jquery-dom-access", "hide": false, "title": "DOM access with jQuery", "child_data": [{"kind": "Scratchpad", "id": "6302453579513856"}, {"kind": "Scratchpad", "id": "5835171531194368"}, {"kind": "Video", "id": "x66bdd711"}, {"kind": "Scratchpad", "id": "5502497297924096"}, {"kind": "Scratchpad", "id": "5126855188414464"}, {"kind": "Article", "id": "x42d58c53"}, {"kind": "Article", "id": "x6cd5453a"}, {"kind": "Article", "id": "xa1258967"}], "children": [{"path": "khan/computing/computer-programming/html-js-jquery/jquery-dom-access/debugging-webpages-with-the-browser-console/", "id": "JuVOwU0RcdA", "title": "Debugging webpages with the browser console", "kind": "Video", "description": "Learn how to debug in your webpages on Khan Academy using console.log() and the Chrome Developer Tools.", "slug": "debugging-webpages-with-the-browser-console"}], "in_knowledge_map": false, "description": "Learn how to access the DOM using jQuery and CSS selectors.", "node_slug": "jquery-dom-access", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-js-jquery/jquery-dom-access", "extended_slug": "computing/computer-programming/html-js-jquery/jquery-dom-access", "kind": "Topic", "slug": "jquery-dom-access"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-programming/html-js-jquery/jquery-tools-techniques/", "id": "jquery-tools-techniques", "hide": false, "title": "jQuery techniques", "child_data": [{"kind": "Scratchpad", "id": "4581645521911808"}, {"kind": "Exercise", "id": "x61b2063e"}, {"kind": "Scratchpad", "id": "6320962449571840"}, {"kind": "Scratchpad", "id": "4768146943770624"}, {"kind": "Article", "id": "x7717704d"}, {"kind": "Scratchpad", "id": "6465457497440256"}, {"kind": "Scratchpad", "id": "4828233402023936"}, {"kind": "Article", "id": "x70d3f378"}], "children": [{"path": "khan/computing/computer-programming/html-js-jquery/jquery-tools-techniques/quiz-jquery-variables/", "id": "quiz--jquery-variables", "title": "Quiz: jQuery variables", "description": "Check your knowledge of how well you understand jQuery collection variables.", "slug": "quiz-jquery-variables", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn a few common techniques used by jQuery developers, like chaining function calls and looping through collections.", "node_slug": "jquery-tools-techniques", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/html-js-jquery/jquery-tools-techniques", "extended_slug": "computing/computer-programming/html-js-jquery/jquery-tools-techniques", "kind": "Topic", "slug": "jquery-tools-techniques"}], "in_knowledge_map": false, "description": "Learn how to use jQuery, the world's most popular JS browser library, to add interactivity to your webpages.", "node_slug": "html-js-jquery", "render_type": "Topic", "topic_page_url": "/computing/computer-programming/html-js-jquery", "extended_slug": "computing/computer-programming/html-js-jquery", "kind": "Topic", "slug": "html-js-jquery"}, {"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-programming/meet-the-computing-professional/", "id": "meet-the-computing-professional", "hide": false, "title": "Meet the Professional", "child_data": [{"kind": "Video", "id": "x2c143ebd"}, {"kind": "Article", "id": "x8779e691"}, {"kind": "Article", "id": "xa4a9c3e1"}, {"kind": "Article", "id": "x2ac03fb5"}, {"kind": "Article", "id": "xb3f98376"}, {"kind": "Article", "id": "xf998ca27"}, {"kind": "Article", "id": "x68a12851"}, {"kind": "Article", "id": "x5034795e"}, {"kind": "Article", "id": "x7adc2d94"}, {"kind": "Article", "id": "x0392d42c"}, {"kind": "Article", "id": "x9bad50cc"}, {"kind": "Article", "id": "x2f29cfb0"}], "children": [{"path": "khan/computing/computer-programming/meet-the-computing-professional/welcome-meet-the-computing-professional/", "id": "Psl3LWRAysQ", "title": "Welcome to \"Meet the Professional\"!", "kind": "Video", "description": "Pamela welcomes you to our new series about computing professionals.", "slug": "welcome-meet-the-computing-professional"}], "in_knowledge_map": false, "description": "What can you do with computer science and programming skills once you've learned them? We've invited people from all around the world and the industry to introduce themselves to you. Find out how diverse our field can be!", "node_slug": "meet-the-computing-professional", "render_type": "Tutorial", "topic_page_url": "/computing/computer-programming/meet-the-computing-professional", "extended_slug": "computing/computer-programming/meet-the-computing-professional", "kind": "Topic", "slug": "meet-the-computing-professional"}], "in_knowledge_map": false, "description": "Learn how to program drawings, animations, and games using JavaScript & ProcessingJS, or learn how to create webpages with HTML & CSS. You can share whatever you create, explore what others have created and learn from each other!", "node_slug": "computer-programming", "render_type": "Subject", "topic_page_url": "/computing/computer-programming", "extended_slug": "computing/computer-programming", "kind": "Topic", "slug": "computer-programming"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/computing/computer-science/", "id": "computer-science", "hide": false, "title": "Computer science", "child_data": [{"kind": "Topic", "id": "x4cd91b0c"}, {"kind": "Topic", "id": "x48c910b6"}, {"kind": "Topic", "id": "x4dca6357"}, {"kind": "Topic", "id": "xce43d9be"}, {"kind": "Topic", "id": "x3b93f104"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/computing/computer-science/algorithms/", "id": "algorithms", "hide": false, "title": "Algorithms", "child_data": [{"kind": "Topic", "id": "x06d329d9"}, {"kind": "Topic", "id": "x7f9cce89"}, {"kind": "Topic", "id": "xf15e54c8"}, {"kind": "Topic", "id": "x163318ed"}, {"kind": "Topic", "id": "xe2b236d2"}, {"kind": "Topic", "id": "xdb0785c4"}, {"kind": "Topic", "id": "x8da3f78d"}, {"kind": "Topic", "id": "x5e770c96"}, {"kind": "Topic", "id": "xa9f8138d"}, {"kind": "Topic", "id": "x595556b1"}, {"kind": "Topic", "id": "xeb6a1ac8"}, {"kind": "Topic", "id": "xa5b358af"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-science/algorithms/intro-to-algorithms/", "id": "intro-to-algorithms", "hide": false, "title": "Intro to algorithms", "child_data": [{"kind": "Video", "id": "x0d0c2a5b"}, {"kind": "Article", "id": "x77830370"}, {"kind": "Article", "id": "x418d391e"}, {"kind": "Article", "id": "x9f86af69"}], "children": [{"path": "khan/computing/computer-science/algorithms/intro-to-algorithms/what-are-algorithms/", "id": "CvSOaYi89B4", "title": "What is an algorithm and why should you care?", "kind": "Video", "slug": "what-are-algorithms"}], "in_knowledge_map": false, "description": "What are algorithms and why should you care? We'll start with an overview of algorithms and then discuss two games that you could use an algorithm to solve more efficiently - the number guessing game and a route-finding game.", "node_slug": "intro-to-algorithms", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/algorithms/intro-to-algorithms", "extended_slug": "computing/computer-science/algorithms/intro-to-algorithms", "kind": "Topic", "slug": "intro-to-algorithms"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-science/algorithms/binary-search/", "id": "binary-search", "hide": false, "title": "Binary search", "child_data": [{"kind": "Article", "id": "xdaa637b0"}, {"kind": "Article", "id": "xe207b3f1"}, {"kind": "Scratchpad", "id": "5182806794698752"}, {"kind": "Article", "id": "x0788117a"}, {"kind": "Exercise", "id": "xa98590db"}], "children": [{"path": "khan/computing/computer-science/algorithms/binary-search/running-time-of-binary-search/", "id": "running-time-of-binary-search", "title": "Quiz: Running time of binary search", "description": "Compute how many steps binary search would take to find an item in arrays of various sizes.", "slug": "running-time-of-binary-search", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn about binary search, a way to efficiently search an array of items by halving the search space each time.", "node_slug": "binary-search", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/algorithms/binary-search", "extended_slug": "computing/computer-science/algorithms/binary-search", "kind": "Topic", "slug": "binary-search"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-science/algorithms/asymptotic-notation/", "id": "asymptotic-notation", "hide": false, "title": "Asymptotic notation", "child_data": [{"kind": "Article", "id": "x956cf7fd"}, {"kind": "Article", "id": "x689441a1"}, {"kind": "Article", "id": "x7491c5e8"}, {"kind": "Exercise", "id": "x414e9dd0"}, {"kind": "Article", "id": "xe10180d4"}, {"kind": "Article", "id": "xdf626fb3"}, {"kind": "Exercise", "id": "xee78cb12"}], "children": [{"path": "khan/computing/computer-science/algorithms/asymptotic-notation/quiz-comparing-function-growth/", "id": "quiz--comparing-function-growth", "title": "Quiz: Comparing function growth", "description": "Rank functions according to how fast they grow.", "slug": "quiz-comparing-function-growth", "kind": "Exercise"}, {"path": "khan/computing/computer-science/algorithms/asymptotic-notation/quiz-asymptotic-notation/", "id": "quiz--asymptotic-notation", "title": "Quiz: Asymptotic notation", "description": "Compare the various notations for algorithm runtime.", "slug": "quiz-asymptotic-notation", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to use asymptotic analysis to describe the efficiency of an algorithm, and how to use asymptotic notation (Big O, Big-Theta, and Big-Omega) to more precisely describe the efficiency.", "node_slug": "asymptotic-notation", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/algorithms/asymptotic-notation", "extended_slug": "computing/computer-science/algorithms/asymptotic-notation", "kind": "Topic", "slug": "asymptotic-notation"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-science/algorithms/graph-representation/", "id": "graph-representation", "hide": false, "title": "Graph representation", "child_data": [{"kind": "Article", "id": "xcb8fd18d"}, {"kind": "Exercise", "id": "xc1ea5aa4"}, {"kind": "Article", "id": "x2950734a"}, {"kind": "Exercise", "id": "xd980bd32"}, {"kind": "Scratchpad", "id": "4720668895870976"}], "children": [{"path": "khan/computing/computer-science/algorithms/graph-representation/quiz-describing-graphs/", "id": "quiz--describing-graphs", "title": "Quiz: Describing graphs", "description": "Tests terminology.", "slug": "quiz-describing-graphs", "kind": "Exercise"}, {"path": "khan/computing/computer-science/algorithms/graph-representation/quiz-representing-graphs/", "id": "quiz--representing-graphs", "title": "Quiz: Representing graphs", "description": "Test edge lists, adjacency lists, adjacency matrices.", "slug": "quiz-representing-graphs", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Learn how to describe graphs, with their edges, vertices, and weights, and see different ways to store graph data, with edge lists, adjacency matrices, and adjacency lists.", "node_slug": "graph-representation", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/algorithms/graph-representation", "extended_slug": "computing/computer-science/algorithms/graph-representation", "kind": "Topic", "slug": "graph-representation"}], "in_knowledge_map": false, "description": "We've partnered with Dartmouth college professors Tom Cormen and Devin Balkcom to teach introductory computer science algorithms, including searching, sorting, recursion, and graph theory. Learn with a combination of articles, visualizations, quizzes, and coding challenges.", "node_slug": "algorithms", "render_type": "Topic", "topic_page_url": "/computing/computer-science/algorithms", "extended_slug": "computing/computer-science/algorithms", "kind": "Topic", "slug": "algorithms"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/computing/computer-science/cryptography/", "id": "cryptography", "hide": false, "title": "Journey into cryptography", "child_data": [{"kind": "Topic", "id": "x8bfe6551"}, {"kind": "Topic", "id": "xa6df0145"}, {"kind": "Topic", "id": "xefc31a1b"}, {"kind": "Topic", "id": "x355061c5"}, {"kind": "Topic", "id": "xab7b8cc1"}, {"kind": "Topic", "id": "xab669f88"}, {"kind": "Topic", "id": "x032b91e2"}, {"kind": "Topic", "id": "x1578fd87"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/computing/computer-science/cryptography/crypt/", "id": "crypt", "hide": false, "title": "Ancient cryptography", "child_data": [{"kind": "Video", "id": "687973969"}, {"kind": "Video", "id": "688226223"}, {"kind": "Scratchpad", "id": "1484692368"}, {"kind": "Scratchpad", "id": "1332517109"}, {"kind": "Video", "id": "716246883"}, {"kind": "Scratchpad", "id": "1474576472"}, {"kind": "Video", "id": "716378217"}, {"kind": "Scratchpad", "id": "1332655677"}, {"kind": "Video", "id": "545983015"}, {"kind": "Scratchpad", "id": "5289513533440000"}, {"kind": "Exercise", "id": "1425137862"}, {"kind": "Video", "id": "743582610"}, {"kind": "Video", "id": "743684078"}, {"kind": "Video", "id": "769897425"}, {"kind": "Scratchpad", "id": "1357742061"}], "children": [{"path": "khan/computing/computer-science/cryptography/crypt/intro-to-cryptography/", "id": "Kf9KjCKmDcU", "title": "What is cryptography?", "kind": "Video", "description": "What is Cryptography? A story which takes us from Caesar to Claude Shannon.", "slug": "intro-to-cryptography"}, {"path": "khan/computing/computer-science/cryptography/crypt/caesar-cipher/", "id": "sMOZf4GN3oc", "title": "The Caesar cipher", "kind": "Video", "description": "Brit explains the Caesar cipher, the first popular substitution cipher, and shows how it was broken with \"frequency analysis\"", "slug": "caesar-cipher"}, {"path": "khan/computing/computer-science/cryptography/crypt/polyalphabetic-cipher/", "id": "BgFJD7oCmDE", "title": "Polyalphabetic cipher", "kind": "Video", "description": "Brit introduces the polyalphabetic cipher, which creates a lighter fingerprint than the Caesar cipher.", "slug": "polyalphabetic-cipher"}, {"path": "khan/computing/computer-science/cryptography/crypt/one-time-pad/", "id": "FlIG3TvQCBQ", "title": "The one-time pad", "kind": "Video", "description": "The perfect cipher", "slug": "one-time-pad"}, {"path": "khan/computing/computer-science/cryptography/crypt/frequency-stability/", "id": "vVXbgbMp0oY", "title": "Frequency stability property short film", "kind": "Video", "description": "Can you tell the difference between actions based upon flipping a coin and those based upon blind guessing or simulating randomness? This short video examines the frequency stability property.", "slug": "frequency-stability"}, {"path": "khan/computing/computer-science/cryptography/crypt/coin_flip_sequences/", "id": "coin_flip_sequences", "title": "Coin flip sequences", "description": "Determine if a sequence of heads and tails was generated with a fair coin, unfair coin, or human guesses.", "slug": "coin_flip_sequences", "kind": "Exercise"}, {"path": "khan/computing/computer-science/cryptography/crypt/case-study-ww2-encryption-machines/", "id": "-1ZFVwMXSXY", "title": "The Enigma encryption machine", "kind": "Video", "description": "WW2 Encryption is explored with a focus on the Enigma. Read more here.", "slug": "case-study-ww2-encryption-machines"}, {"path": "khan/computing/computer-science/cryptography/crypt/perfect-secrecy/", "id": "vKRMWewGE9A", "title": "Perfect secrecy", "kind": "Video", "description": "Claude Shannon's idea of perfect secrecy: no amount of computational power can help improve your ability to break the one-time pad", "slug": "perfect-secrecy"}, {"path": "khan/computing/computer-science/cryptography/crypt/random-vs-pseudorandom-number-generators/", "id": "GtOt7EBNEwQ", "title": "Pseudorandom number generators", "kind": "Video", "description": "Random vs. Pseudorandom Number Generators", "slug": "random-vs-pseudorandom-number-generators"}], "in_knowledge_map": false, "description": "Explore how we have hidden secret messages through history.", "node_slug": "crypt", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/cryptography/crypt", "extended_slug": "computing/computer-science/cryptography/crypt", "kind": "Topic", "slug": "crypt"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-science/cryptography/ciphers/", "id": "ciphers", "hide": false, "title": "Ciphers", "child_data": [{"kind": "Article", "id": "xeaa71f01"}, {"kind": "Article", "id": "xce66587a"}, {"kind": "Exercise", "id": "x1c3c96cd"}, {"kind": "Exercise", "id": "x28a9b2e6"}, {"kind": "Exercise", "id": "xa39efedf"}, {"kind": "Exercise", "id": "x3f3a232a"}, {"kind": "Article", "id": "xf6dc668a"}, {"kind": "Article", "id": "x42cede74"}, {"kind": "Scratchpad", "id": "1855618703"}, {"kind": "Exercise", "id": "x18ff55e1"}, {"kind": "Article", "id": "x5dd3af77"}], "children": [{"path": "khan/computing/computer-science/cryptography/ciphers/caesar_cipher_encryption/", "id": "caesar_cipher_encryption", "title": "Caesar cipher encryption", "slug": "caesar_cipher_encryption", "kind": "Exercise"}, {"path": "khan/computing/computer-science/cryptography/ciphers/caesar_cipher_decryption/", "id": "caesar_cipher_decryption", "title": "Caesar cipher decryption", "slug": "caesar_cipher_decryption", "kind": "Exercise"}, {"path": "khan/computing/computer-science/cryptography/ciphers/caesar_cipher_frequency_analysis/", "id": "caesar_cipher_frequency_analysis", "title": "Caesar cipher frequency analysis", "slug": "caesar_cipher_frequency_analysis", "kind": "Exercise"}, {"path": "khan/computing/computer-science/cryptography/ciphers/vigenere_cipher_encryption/", "id": "vigenere_cipher_encryption", "title": "Vigenere cipher encryption", "slug": "vigenere_cipher_encryption", "kind": "Exercise"}, {"path": "khan/computing/computer-science/cryptography/ciphers/bitwise-operators/", "id": "bitwise-operators", "title": "Bitwise operators", "slug": "bitwise-operators", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Assess your understanding of the code breaking presented in the ancient cryptography lesson. This series of articles and exercises will prepare you for the upcoming challenge!", "node_slug": "ciphers", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/cryptography/ciphers", "extended_slug": "computing/computer-science/cryptography/ciphers", "kind": "Topic", "slug": "ciphers"}, {"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-science/cryptography/modern-crypt/", "id": "modern-crypt", "hide": false, "title": "Modern cryptography", "child_data": [{"kind": "Video", "id": "688165658"}, {"kind": "Video", "id": "1174169184"}, {"kind": "Video", "id": "1174224696"}, {"kind": "Video", "id": "1174406364"}, {"kind": "Video", "id": "1174223673"}, {"kind": "Video", "id": "1174378584"}, {"kind": "Video", "id": "1174307926"}, {"kind": "Scratchpad", "id": "1466763719"}, {"kind": "Video", "id": "1174381381"}, {"kind": "Scratchpad", "id": "1319449803"}, {"kind": "Video", "id": "1174496039"}, {"kind": "Video", "id": "951674691"}], "children": [{"path": "khan/computing/computer-science/cryptography/modern-crypt/the-fundamental-theorem-of-arithmetic-1/", "id": "8CluknrLeys", "title": "The fundamental theorem of arithmetic", "kind": "Video", "description": "Independent realization from an ancestor's perspective", "slug": "the-fundamental-theorem-of-arithmetic-1"}, {"path": "khan/computing/computer-science/cryptography/modern-crypt/diffie-hellman-key-exchange-part-1/", "id": "MsqqpO9R5Hc", "title": "Public key cryptography: What is it?", "kind": "Video", "description": "Why do we need public key cryptography?", "slug": "diffie-hellman-key-exchange-part-1"}, {"path": "khan/computing/computer-science/cryptography/modern-crypt/discrete-logarithm-problem/", "id": "SL7J8hPKEWY", "title": "The discrete logarithm problem", "kind": "Video", "description": "A mathematical lock using modular arithmetic", "slug": "discrete-logarithm-problem"}, {"path": "khan/computing/computer-science/cryptography/modern-crypt/diffie-hellman-key-exchange-part-2/", "id": "M-0qt6tdHzk", "title": "Diffie-hellman key exchange", "kind": "Video", "description": "Walkthrough of Diffie-Hellman Key Exchange", "slug": "diffie-hellman-key-exchange-part-2"}, {"path": "khan/computing/computer-science/cryptography/modern-crypt/intro-to-rsa-encryption/", "id": "EPXilYOa71c", "title": "RSA encryption: Step 1", "kind": "Video", "description": "Introduction to why we would need RSA", "slug": "intro-to-rsa-encryption"}, {"path": "khan/computing/computer-science/cryptography/modern-crypt/rsa-encryption-step-2/", "id": "IY8BXNFgnyI", "title": "RSA encryption: Step 2", "kind": "Video", "description": "Setting up a trapdoor one-way function", "slug": "rsa-encryption-step-2"}, {"path": "khan/computing/computer-science/cryptography/modern-crypt/rsa-encryption-step-3/", "id": "cJvoi0LuutQ", "title": "RSA encryption: Step 3", "kind": "Video", "description": "RSA Encryption (step 3)", "slug": "rsa-encryption-step-3"}, {"path": "khan/computing/computer-science/cryptography/modern-crypt/euler-s-totient-function-phi-function/", "id": "qa_hksAzpSg", "title": "Euler's totient function", "kind": "Video", "description": "Measuring the divisibility of a number", "slug": "euler-s-totient-function-phi-function"}, {"path": "khan/computing/computer-science/cryptography/modern-crypt/rsa-encryption-part-4/", "id": "UjIPMJd6Xks", "title": "RSA encryption: Step 4", "kind": "Video", "description": "RSA worked example", "slug": "rsa-encryption-part-4"}, {"path": "khan/computing/computer-science/cryptography/modern-crypt/checkpoint-advanced-lessons/", "id": "A9Km337z15k", "title": "What should we learn next?", "kind": "Video", "description": "Help decide what's next! What do you want to learn?", "slug": "checkpoint-advanced-lessons"}], "in_knowledge_map": false, "description": "A new problem emerges in the 20th century. What happens if Alice and Bob can never meet to share a key in the first place?", "node_slug": "modern-crypt", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/cryptography/modern-crypt", "extended_slug": "computing/computer-science/cryptography/modern-crypt", "kind": "Topic", "slug": "modern-crypt"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-science/cryptography/cryptochallenge/", "id": "cryptochallenge", "hide": false, "title": "Cryptography challenge 101", "child_data": [{"kind": "Article", "id": "xa7ef6897"}, {"kind": "Article", "id": "x9114c20a"}, {"kind": "Article", "id": "x41c0cb9f"}, {"kind": "Article", "id": "x17f1ba1b"}, {"kind": "Article", "id": "xd644ca6a"}, {"kind": "Exercise", "id": "xb4666e49"}, {"kind": "Article", "id": "x758eea38"}, {"kind": "Article", "id": "x7bb92a83"}, {"kind": "Exercise", "id": "x1f7158d0"}, {"kind": "Exercise", "id": "x61c09142"}, {"kind": "Article", "id": "xb8304341"}], "children": [{"path": "khan/computing/computer-science/cryptography/cryptochallenge/clue-1-test/", "id": "clue-1-test", "title": "Crypto checkpoint 1", "description": "Test if you successfully decrypted clue 1, 2 & 3", "slug": "clue-1-test", "kind": "Exercise"}, {"path": "khan/computing/computer-science/cryptography/cryptochallenge/crypto-checkpoint-2/", "id": "crypto-checkpoint-2", "title": "Crypto checkpoint 2", "description": "Test if you decrypted the secret code", "slug": "crypto-checkpoint-2", "kind": "Exercise"}, {"path": "khan/computing/computer-science/cryptography/cryptochallenge/crypto-checkpoint-3/", "id": "crypto-checkpoint-3", "title": "Crypto checkpoint 3", "slug": "crypto-checkpoint-3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Ready to try your hand at real-world code breaking? This adventure contains a beginner, intermediate and super-advanced level. See how far you can go!", "node_slug": "cryptochallenge", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/cryptography/cryptochallenge", "extended_slug": "computing/computer-science/cryptography/cryptochallenge", "kind": "Topic", "slug": "cryptochallenge"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/computing/computer-science/cryptography/modarithmetic/", "id": "modarithmetic", "hide": false, "title": "Modular arithmetic", "child_data": [{"kind": "Article", "id": "x1343778b"}, {"kind": "Exercise", "id": "xcd0a6b16"}, {"kind": "Scratchpad", "id": "1624285196"}, {"kind": "Article", "id": "x2ea56a42"}, {"kind": "Exercise", "id": "x35d5de07"}, {"kind": "Article", "id": "x00da2b92"}, {"kind": "Article", "id": "x0b96127d"}, {"kind": "Article", "id": "x6e4e9757"}, {"kind": "Exercise", "id": "x0fb00c34"}, {"kind": "Scratchpad", "id": "1662781984"}, {"kind": "Article", "id": "xf15c7b9b"}, {"kind": "Exercise", "id": "x4f1b0de8"}, {"kind": "Article", "id": "x2ba82f52"}, {"kind": "Article", "id": "xfe886d6a"}, {"kind": "Scratchpad", "id": "1570960917"}, {"kind": "Article", "id": "xf75855db"}, {"kind": "Article", "id": "xe7fecd26"}], "children": [{"path": "khan/computing/computer-science/cryptography/modarithmetic/modulo-operator/", "id": "modulo-operator", "title": "Modulo operator", "description": "Practice using the modulo operator", "slug": "modulo-operator", "kind": "Exercise"}, {"path": "khan/computing/computer-science/cryptography/modarithmetic/congruence-relation/", "id": "congruence-relation", "title": "Congruence relation", "slug": "congruence-relation", "kind": "Exercise"}, {"path": "khan/computing/computer-science/cryptography/modarithmetic/modular-addition/", "id": "modular-addition", "title": "Modular addition", "slug": "modular-addition", "kind": "Exercise"}, {"path": "khan/computing/computer-science/cryptography/modarithmetic/modular-multiplication/", "id": "modular-multiplication", "title": "Modular multiplication", "slug": "modular-multiplication", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This is a system of arithmetic for integers. These lessons provide a foundation for the mathematics presented in the Modern Cryptography tutorial.", "node_slug": "modarithmetic", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/cryptography/modarithmetic", "extended_slug": "computing/computer-science/cryptography/modarithmetic", "kind": "Topic", "slug": "modarithmetic"}, {"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-science/cryptography/comp-number-theory/", "id": "comp-number-theory", "hide": false, "title": "Primality test", "child_data": [{"kind": "Article", "id": "x6138911e"}, {"kind": "Video", "id": "xa9ad2ac7"}, {"kind": "Article", "id": "xdcef66b7"}, {"kind": "Video", "id": "1184361314"}, {"kind": "Video", "id": "1057328491"}, {"kind": "Scratchpad", "id": "1054863863"}, {"kind": "Video", "id": "1098965286"}, {"kind": "Scratchpad", "id": "1096543070"}, {"kind": "Video", "id": "1098805994"}, {"kind": "Scratchpad", "id": "1097515635"}, {"kind": "Video", "id": "1119980008"}, {"kind": "Scratchpad", "id": "1125572884"}, {"kind": "Scratchpad", "id": "1132985154"}, {"kind": "Video", "id": "1243559297"}, {"kind": "Video", "id": "1339534424"}], "children": [{"path": "khan/computing/computer-science/cryptography/comp-number-theory/primality-test-challenge/", "id": "HIu1S2Wsso8", "title": "Primality test challenge", "kind": "Video", "description": "How can a machine tell us if a number is prime?", "slug": "primality-test-challenge"}, {"path": "khan/computing/computer-science/cryptography/comp-number-theory/what-is-computer-memory-prime-adventure-part-7/", "id": "h6YWCuuJVj4", "title": "What is computer memory?", "kind": "Video", "description": "What is the limit of computer memory?", "slug": "what-is-computer-memory-prime-adventure-part-7"}, {"path": "khan/computing/computer-science/cryptography/comp-number-theory/algorithmic-efficiency/", "id": "oYUzKAfrx0w", "title": "Algorithmic efficiency", "kind": "Video", "description": "How can we improve the speed of a (deterministic) primality test?", "slug": "algorithmic-efficiency"}, {"path": "khan/computing/computer-science/cryptography/comp-number-theory/sieve-of-eratosthenes-prime-adventure-part-4/", "id": "klcIklsWzrY", "title": "Sieve of Eratosthenes", "kind": "Video", "description": "Sieve of Eratosthenes allows us to generate a list of primes.", "slug": "sieve-of-eratosthenes-prime-adventure-part-4"}, {"path": "khan/computing/computer-science/cryptography/comp-number-theory/trial-division-primality-test-using-a-sieve-prime-adventure-part-5/", "id": "XspzfNSSqyk", "title": "Primality test with sieve", "kind": "Video", "description": "An attempt at an optimal trial division primality test using the Sieve of Eratosthenes.", "slug": "trial-division-primality-test-using-a-sieve-prime-adventure-part-5"}, {"path": "khan/computing/computer-science/cryptography/comp-number-theory/prime-number-theorem-the-density-of-primes/", "id": "7jzCJJIc59E", "title": "The prime number theorem", "kind": "Video", "description": "How can we estimate the number of primes up to x?", "slug": "prime-number-theorem-the-density-of-primes"}, {"path": "khan/computing/computer-science/cryptography/comp-number-theory/time-space-tradeoff/", "id": "9YRw0Yk7N8c", "title": "Time space tradeoff", "kind": "Video", "description": "what is our memory limit? How can save time at the expense of space?", "slug": "time-space-tradeoff"}, {"path": "khan/computing/computer-science/cryptography/comp-number-theory/rsa-encryption-checkpoint/", "id": "kFkUSizmR3k", "title": "Summary (what's next?)", "kind": "Video", "description": "Why is factorization hard, yet generating primes easy? Where do we go from here?", "slug": "rsa-encryption-checkpoint"}], "in_knowledge_map": false, "description": "Why do primes make some problems fundamentally hard? To find out we need to explore primality tests in more detail.", "node_slug": "comp-number-theory", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/cryptography/comp-number-theory", "extended_slug": "computing/computer-science/cryptography/comp-number-theory", "kind": "Topic", "slug": "comp-number-theory"}, {"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-science/cryptography/random-algorithms-probability/", "id": "random-algorithms-probability", "hide": false, "title": "Randomized algorithms", "child_data": [{"kind": "Video", "id": "1308593756"}, {"kind": "Video", "id": "1317894497"}, {"kind": "Scratchpad", "id": "1329634761"}, {"kind": "Video", "id": "x5b614fc1"}, {"kind": "Scratchpad", "id": "1456100613"}, {"kind": "Video", "id": "x77e83a17"}, {"kind": "Video", "id": "x65b844aa"}, {"kind": "Scratchpad", "id": "1663470288"}], "children": [{"path": "khan/computing/computer-science/cryptography/random-algorithms-probability/randomized-algorithms-prime-adventure-part-8/", "id": "WGMn16TDTjE", "title": "Randomized algorithms (intro)", "kind": "Video", "description": "How could random numbers speed up a decision algorithm?", "slug": "randomized-algorithms-prime-adventure-part-8"}, {"path": "khan/computing/computer-science/cryptography/random-algorithms-probability/bayes-theorem-visualized/", "id": "Zxm4Xxvzohk", "title": "Conditional probability warmup", "kind": "Video", "description": "Conditional probability visualized using trees.", "slug": "bayes-theorem-visualized"}, {"path": "khan/computing/computer-science/cryptography/random-algorithms-probability/random-primality-test-prime-adventure-part-9/", "id": "1mjyq51ppT8", "title": "Random primality test (warm up)", "kind": "Video", "description": "Introduction to random primality tests & how they will work (warm up).", "slug": "random-primality-test-prime-adventure-part-9"}, {"path": "khan/computing/computer-science/cryptography/random-algorithms-probability/fermat-s-little-theorem-visualization/", "id": "OoQ16YCYksw", "title": "Fermat's little theorem", "kind": "Video", "description": "Introduction to a key result in elementary number theory using a visualization with beads", "slug": "fermat-s-little-theorem-visualization"}, {"path": "khan/computing/computer-science/cryptography/random-algorithms-probability/fermat-primality-test-prime-adventure-part-10/", "id": "xMj3jzFDZ38", "title": "Fermat primality test", "kind": "Video", "description": "A quick outline of how & why it works.", "slug": "fermat-primality-test-prime-adventure-part-10"}], "in_knowledge_map": false, "description": "Would access to coin flips speed up a primality test? How would this work?", "node_slug": "random-algorithms-probability", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/cryptography/random-algorithms-probability", "extended_slug": "computing/computer-science/cryptography/random-algorithms-probability", "kind": "Topic", "slug": "random-algorithms-probability"}], "in_knowledge_map": false, "description": "How have humans protected their secret messages through history? What has changed today?", "node_slug": "cryptography", "render_type": "Topic", "topic_page_url": "/computing/computer-science/cryptography", "extended_slug": "computing/computer-science/cryptography", "kind": "Topic", "slug": "cryptography"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/computing/computer-science/informationtheory/", "id": "informationtheory", "hide": false, "title": "Journey into information theory", "child_data": [{"kind": "Topic", "id": "x7a50e3ab"}, {"kind": "Topic", "id": "x6a21eb18"}, {"kind": "Topic", "id": "xa6e1de9c"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-science/informationtheory/info-theory/", "id": "info-theory", "hide": false, "title": "Ancient information theory", "child_data": [{"kind": "Video", "id": "1038441165"}, {"kind": "Video", "id": "1087251094"}, {"kind": "Video", "id": "1166670884"}, {"kind": "Video", "id": "671459930"}, {"kind": "Video", "id": "1200813627"}, {"kind": "Video", "id": "1292595017"}, {"kind": "Scratchpad", "id": "1309746332"}, {"kind": "Video", "id": "1384491099"}, {"kind": "Video", "id": "1395994610"}, {"kind": "Video", "id": "1425695127"}, {"kind": "Scratchpad", "id": "1425715036"}], "children": [{"path": "khan/computing/computer-science/informationtheory/info-theory/intro-information-theory/", "id": "d9alWZRzBWk", "title": "What is information theory?", "kind": "Video", "description": "A broad introduction to this field of study", "slug": "intro-information-theory"}, {"path": "khan/computing/computer-science/informationtheory/info-theory/language-of-coins-2-8-proto-writing/", "id": "lkeXaqoXDYQ", "title": "Origins of written language", "kind": "Video", "slug": "language-of-coins-2-8-proto-writing"}, {"path": "khan/computing/computer-science/informationtheory/info-theory/history-of-the-alphabet-language-of-coins-3-9/", "id": "6NrTrBzC6dk", "title": "History of the alphabet", "kind": "Video", "description": "The origin of letters", "slug": "history-of-the-alphabet-language-of-coins-3-9"}, {"path": "khan/computing/computer-science/informationtheory/info-theory/rosetta-stone-196-b-c-e/", "id": "OFXY9-pec1I", "title": "Ptolemaic: Rosetta Stone", "kind": "Video", "description": "Rosetta Stone, 196 B.C.E., granite, 114.4 cm x 72.3 x 27.9 cm or 45 x 28.5 x 11 inches, Ptolemaic Period (British Museum, London). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "rosetta-stone-196-b-c-e"}, {"path": "khan/computing/computer-science/informationtheory/info-theory/source-encoding-language-of-coins-4-9/", "id": "gBKBKfikLbo", "title": "Source encoding", "kind": "Video", "description": "Introduction to coding theory!", "slug": "source-encoding-language-of-coins-4-9"}, {"path": "khan/computing/computer-science/informationtheory/info-theory/history-of-optical-telegraphs-language-of-coins-5-9/", "id": "cKkacTkCjjs", "title": "Visual telegraphs (case study)", "kind": "Video", "description": "The history of visual telegraphs", "slug": "history-of-optical-telegraphs-language-of-coins-5-9"}, {"path": "khan/computing/computer-science/informationtheory/info-theory/history-of-static-electricity-language-of-coins-6-12/", "id": "AurTtzpAr4c", "title": "Electrostatic telegraphs (case study)", "kind": "Video", "description": "Long before the internet people thought about sending information along wires using static electricity.", "slug": "history-of-static-electricity-language-of-coins-6-12"}, {"path": "khan/computing/computer-science/informationtheory/info-theory/the-battery-electromagnetism/", "id": "oxpr5dhqqyw", "title": "The battery and electromagnetism", "kind": "Video", "description": "The key technologies in our story.", "slug": "the-battery-electromagnetism"}, {"path": "khan/computing/computer-science/informationtheory/info-theory/morse-code-the-information-age-language-of-coins-8-12/", "id": "abq95BTwOGo", "title": "Morse code and the information age", "kind": "Video", "description": "Electric Telegraphs and developments leading to Morse Code.", "slug": "morse-code-the-information-age-language-of-coins-8-12"}], "in_knowledge_map": false, "description": "Explore the history of communication from signal fires to the Information Age", "node_slug": "info-theory", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/informationtheory/info-theory", "extended_slug": "computing/computer-science/informationtheory/info-theory", "kind": "Topic", "slug": "info-theory"}, {"icon_src": "", "contains": ["Video"], "path": "khan/computing/computer-science/informationtheory/moderninfotheory/", "id": "moderninfotheory", "hide": false, "title": "Modern information theory", "child_data": [{"kind": "Video", "id": "x855fe87a"}, {"kind": "Video", "id": "xcbdaedb9"}, {"kind": "Scratchpad", "id": "1528848089"}, {"kind": "Video", "id": "xf28c646b"}, {"kind": "Video", "id": "xc8498f37"}, {"kind": "Scratchpad", "id": "1746683168"}, {"kind": "Video", "id": "xd6d19bb3"}, {"kind": "Scratchpad", "id": "1826822737"}, {"kind": "Video", "id": "xae366661"}, {"kind": "Video", "id": "xf32e3442"}, {"kind": "Video", "id": "x27942df3"}, {"kind": "Video", "id": "xf7515a5b"}], "children": [{"path": "khan/computing/computer-science/informationtheory/moderninfotheory/symbol-rate-information-theory/", "id": "nuUkcbAId6o", "title": "Symbol rate", "kind": "Video", "description": "Introduction to Symbol Rate (Baud)", "slug": "symbol-rate-information-theory"}, {"path": "khan/computing/computer-science/informationtheory/moderninfotheory/intro-to-channel-capacity-information-theory/", "id": "W-OskAegz5o", "title": "Introduction to channel capacity", "kind": "Video", "description": "Introduction to Channel Capacity & Message Space", "slug": "intro-to-channel-capacity-information-theory"}, {"path": "khan/computing/computer-science/informationtheory/moderninfotheory/how-do-we-measure-information-language-of-coins-10-12/", "id": "PtmzfpV6CDE", "title": "Measuring information", "kind": "Video", "description": "How can we quantify/measure an information source?", "slug": "how-do-we-measure-information-language-of-coins-10-12"}, {"path": "khan/computing/computer-science/informationtheory/moderninfotheory/markov_chains/", "id": "Ws63I3F7Moc", "title": "Origin of Markov chains", "kind": "Video", "description": "Introduction to Markov chains", "slug": "markov_chains"}, {"path": "khan/computing/computer-science/informationtheory/moderninfotheory/a-mathematical-theory-of-communication/", "id": "WyAtOqfCiBw", "title": "A mathematical theory of communication", "kind": "Video", "description": "Claude Shannon demonstrated how to generate \"english looking\" text using Markov chains.", "slug": "a-mathematical-theory-of-communication"}, {"path": "khan/computing/computer-science/informationtheory/moderninfotheory/information-entropy/", "id": "2s3aJfRr9gE", "title": "Information entropy", "kind": "Video", "description": "Finally we arrive at our quantitative measure of entropy", "slug": "information-entropy"}, {"path": "khan/computing/computer-science/informationtheory/moderninfotheory/compressioncodes/", "id": "TxkA5UX4kis", "title": "Compression codes", "kind": "Video", "description": "What is the limit of compression?", "slug": "compressioncodes"}, {"path": "khan/computing/computer-science/informationtheory/moderninfotheory/testtest/", "id": "q-3BctoUpHE", "title": "Error correction", "kind": "Video", "description": "How can we communicate in the presence of noise?", "slug": "testtest"}, {"path": "khan/computing/computer-science/informationtheory/moderninfotheory/seti/", "id": "UFNsjLUN1g8", "title": "The search for extraterrestrial intelligence", "kind": "Video", "description": "Can information theory help us talk to aliens?", "slug": "seti"}], "in_knowledge_map": false, "description": "Information Theory in the 20th Century", "node_slug": "moderninfotheory", "render_type": "Tutorial", "topic_page_url": "/computing/computer-science/informationtheory/moderninfotheory", "extended_slug": "computing/computer-science/informationtheory/moderninfotheory", "kind": "Topic", "slug": "moderninfotheory"}], "in_knowledge_map": false, "description": "We've always been communicating.... as we moved from signal fires, to alphabets & electricity the problems remained the same.", "node_slug": "informationtheory", "render_type": "Topic", "topic_page_url": "/computing/computer-science/informationtheory", "extended_slug": "computing/computer-science/informationtheory", "kind": "Topic", "slug": "informationtheory"}], "in_knowledge_map": false, "description": "Learn select topics from computer science - algorithms (how we solve common problems in computer science and measure the efficiency of our solutions), cryptography (how we protect secret information), and information theory (how we encode and compress information).", "node_slug": "computer-science", "render_type": "Subject", "topic_page_url": "/computing/computer-science", "extended_slug": "computing/computer-science", "kind": "Topic", "slug": "computer-science"}], "in_knowledge_map": false, "description": "Learn how to code computer programs, how to design algorithms that make computers more efficient, and discover what a career in computing could look like.", "node_slug": "computing", "render_type": "Domain", "topic_page_url": "/computing", "extended_slug": "computing", "kind": "Topic", "slug": "computing"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/", "id": "test-prep", "hide": false, "title": "Test prep", "child_data": [{"kind": "Topic", "id": "x0a8c2e5f"}, {"kind": "Topic", "id": "x5f660a8e"}, {"kind": "Topic", "id": "x04f6bc56"}, {"kind": "Topic", "id": "xaa2aeda9"}, {"kind": "Topic", "id": "xa0e62ca2"}, {"kind": "Topic", "id": "x1a6b3c6f"}, {"kind": "Topic", "id": "x638449e3"}, {"kind": "Topic", "id": "x2b82c5c4"}, {"kind": "Topic", "id": "x580c28a8"}, {"kind": "Topic", "id": "x5be34230"}, {"kind": "Topic", "id": "xe415517b"}, {"kind": "Topic", "id": "x86b33cbd"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/sat/", "id": "sat", "hide": false, "title": "Current SAT (through January 2016)", "child_data": [{"kind": "Topic", "id": "x8b830bff"}, {"kind": "Topic", "id": "x0d517473"}, {"kind": "Topic", "id": "xc5726ef1"}, {"kind": "Topic", "id": "xbe39d41a"}, {"kind": "Topic", "id": "x6f141efa"}, {"kind": "Topic", "id": "x9cc35cb0"}, {"kind": "Topic", "id": "x8874e3c0"}, {"kind": "Topic", "id": "xf3ff453b"}, {"kind": "Topic", "id": "xef8f6749"}, {"kind": "Topic", "id": "xc8aa1bad"}, {"kind": "Topic", "id": "xcaf631a9"}, {"kind": "Topic", "id": "xb656a123"}, {"kind": "Topic", "id": "x2cc75188"}, {"kind": "Topic", "id": "x8cb799e4"}, {"kind": "Topic", "id": "xa142ef20"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/sat/full-length-sat-1/", "id": "full-length-SAT-1", "hide": false, "title": "Full-length SAT", "child_data": [{"kind": "Topic", "id": "x9b9fef2c"}, {"kind": "Topic", "id": "x405067a9"}, {"kind": "Topic", "id": "x99128af8"}, {"kind": "Topic", "id": "xe90db33c"}, {"kind": "Topic", "id": "x87956dfd"}, {"kind": "Topic", "id": "x10fa08f9"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/", "id": "SAT-test1-section2", "hide": false, "title": "Section 2", "child_data": [{"kind": "Video", "id": "xcc217f03"}, {"kind": "Video", "id": "xcf71266b"}, {"kind": "Video", "id": "x39a25f56"}, {"kind": "Video", "id": "x688f5b04"}, {"kind": "Video", "id": "xb1a575e4"}, {"kind": "Video", "id": "x5003fe72"}, {"kind": "Video", "id": "xedc4450c"}, {"kind": "Video", "id": "x4c3d1533"}, {"kind": "Video", "id": "xefb1c27a"}, {"kind": "Video", "id": "x52eb7018"}, {"kind": "Video", "id": "x8509e557"}, {"kind": "Video", "id": "x4390e0ac"}, {"kind": "Video", "id": "x2cb8b3e5"}, {"kind": "Video", "id": "xdc4dab81"}, {"kind": "Video", "id": "xf96cc87a"}, {"kind": "Video", "id": "x70de8aa1"}, {"kind": "Video", "id": "xe9343679"}, {"kind": "Video", "id": "xf4169248"}], "children": [{"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-1/", "id": "k-f5VectwnE", "title": "1 Solving for 2x", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-1"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-2/", "id": "v62741EasZs", "title": "2 Dividing same number by 2 and 4", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-2"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-3/", "id": "0mWq45973ok", "title": "3 Letter symmetry", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-3"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-4/", "id": "-qP2831i9Rc", "title": "4 Solving for an angle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-4"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-5/", "id": "YF2JdYpsFcQ", "title": "5 Equation that describes number pairs", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-5"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-6/", "id": "xE2HVxOPuMM", "title": "6 Percent expenditure to actual expenditure", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-6"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-7/", "id": "ZFt_v7Asy1s", "title": "7 Exponential equation with different bases", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-7"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-8/", "id": "A2fB3JOH9rQ", "title": "8 Comparing percent discounts", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-8"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-9/", "id": "Xrh3cInCFFc", "title": "9 Substituting function definition", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-9"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-10/", "id": "PX7EZPcamk8", "title": "10 Maximum triangle area given side lengths", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-10"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-11/", "id": "aietYaTqBss", "title": "11 Proportion of total votes", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-11"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-12/", "id": "M8Cbv0yptNE", "title": "12 Probability satisfying inequality", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-12"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-13/", "id": "afgbUjRYt3A", "title": "13 Difference between number and square", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-13"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-14/", "id": "MfOoWkH2NUA", "title": "14 Distance within cylinder", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-14"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-15/", "id": "0Z63Mv8hGnU", "title": "15 Possible values for expression", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-15"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-16-18/", "id": "zM4cHiV3kF4", "title": "16-18 Shortest paths on grid", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-16-18"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-19/", "id": "nu13yQDo4Go", "title": "19 Exponent properties to factor expression", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-19"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section2/sat-getting-ready-2-20/", "id": "BD2avz0161k", "title": "20 Units digits of products", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-getting-ready-2-20"}], "in_knowledge_map": false, "description": "In section 2, you'll zero in on math practice with a bunch of math problems from a real SAT. \nWant even more math practice? Check out sections 6 and 8 and the SAT Math practice topic.", "node_slug": "SAT-test1-section2", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/full-length-SAT-1/SAT-test1-section2", "extended_slug": "test-prep/sat/full-length-SAT-1/SAT-test1-section2", "kind": "Topic", "slug": "sat-test1-section2"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section3/", "id": "SAT-test1-section3", "hide": false, "title": "Section 3", "child_data": [{"kind": "Video", "id": "x6b7a42ed"}, {"kind": "Video", "id": "x5b4f193c"}, {"kind": "Video", "id": "xd7e9b12c"}, {"kind": "Video", "id": "x08e004e5"}, {"kind": "Video", "id": "x8e6ad9ac"}], "children": [{"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section3/sat-1-private-universities/", "id": "Jts_mdQmbUg", "title": "1 Private universities", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-1-private-universities"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section3/sat-2-defying-oppression/", "id": "rai9hJOGJLE", "title": "2 Defying oppression", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2-defying-oppression"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section3/sat-3-camouflage/", "id": "FBn1RlGfdzg", "title": "3 Camouflage", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-3-camouflage"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section3/sat-4-economists/", "id": "arWBWBfNMB8", "title": "4 Economists", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-4-economists"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section3/sat-5-home-colors/", "id": "MOoGlIpNLkM", "title": "5 Home colors", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-5-home-colors"}], "in_knowledge_map": false, "description": "In Section 3, let's switch gears and focus on Reading questions, starting on pg. 48 of the downloadable SAT.\nWant even more reading practice? Check out the SAT Reading and Writing practice topic.", "node_slug": "SAT-test1-section3", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/full-length-SAT-1/SAT-test1-section3", "extended_slug": "test-prep/sat/full-length-SAT-1/SAT-test1-section3", "kind": "Topic", "slug": "sat-test1-section3"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/", "id": "SAT-test1-section5", "hide": false, "title": "Section 5", "child_data": [{"kind": "Video", "id": "x06685418"}, {"kind": "Video", "id": "xf265dd7d"}, {"kind": "Video", "id": "xa114da01"}, {"kind": "Video", "id": "x67047a96"}, {"kind": "Video", "id": "x1fc9a79b"}, {"kind": "Video", "id": "xe1c3192e"}, {"kind": "Video", "id": "x511508ce"}, {"kind": "Video", "id": "xaeae2fe4"}, {"kind": "Video", "id": "xc915ca3c"}, {"kind": "Video", "id": "xb7f3cf6e"}, {"kind": "Video", "id": "x1f7c57eb"}, {"kind": "Video", "id": "xb63073d9"}, {"kind": "Video", "id": "x94c8aea0"}, {"kind": "Video", "id": "xe37d43e2"}, {"kind": "Video", "id": "xed62a2a3"}, {"kind": "Video", "id": "x10c1a46e"}, {"kind": "Video", "id": "x07536c9f"}, {"kind": "Video", "id": "x157c34c5"}, {"kind": "Video", "id": "x5e642749"}, {"kind": "Video", "id": "x233987bd"}, {"kind": "Video", "id": "x0eaf6572"}, {"kind": "Video", "id": "xbac354f0"}, {"kind": "Video", "id": "xc62ceda9"}, {"kind": "Video", "id": "xe4a219a6"}, {"kind": "Video", "id": "x8863d21b"}, {"kind": "Video", "id": "x6b4c2c93"}, {"kind": "Video", "id": "x30a5a234"}, {"kind": "Video", "id": "xbbe8bc69"}, {"kind": "Video", "id": "x35d0db68"}], "children": [{"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-1-working-at-convenience-store/", "id": "5OYIXxNz6Xk", "title": "1 Working at convenience store", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-1-working-at-convenience-store"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-2-course-reviews/", "id": "DTF2qg2McwY", "title": "2 Course reviews", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2-course-reviews"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-3-central-park/", "id": "Bv_3hBUTOk4", "title": "3 Central Park", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-3-central-park"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-4-roaming-deer/", "id": "sCHiJVnyo4g", "title": "4 Roaming deer", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-4-roaming-deer"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-5-book-costs/", "id": "1_ymCFwbGGY", "title": "5 Book costs", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-5-book-costs"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/6-sea-islands/", "id": "IHEPNJJlGT4", "title": "6 Sea Islands", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "6-sea-islands"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-7-dramatic-monologue/", "id": "Aa0l_P0K5fs", "title": "7 Dramatic monologue", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-7-dramatic-monologue"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-8-romantic-poets/", "id": "l5xbFna_j0Q", "title": "8 Romantic poets", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-8-romantic-poets"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-9-constitutional-convention/", "id": "gh_3hch2YNM", "title": "9 Constitutional Convention", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-9-constitutional-convention"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-10-oil-imports/", "id": "oapNz_NNGh4", "title": "10 Oil imports", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-10-oil-imports"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-11-love-and-marriage/", "id": "pWSq7CGh9tg", "title": "11 Love and marriage", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-11-love-and-marriage"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-12-roller-coaster/", "id": "Kwk62Xw6YHU", "title": "12 Roller coaster", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-12-roller-coaster"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-13-inflation-rate/", "id": "wgnJevkTEdw", "title": "13 Inflation rate", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-13-inflation-rate"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/14-apparel-manufacturers/", "id": "QnWQezGy1Tc", "title": "14 Apparel manufacturers", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "14-apparel-manufacturers"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-15-storing-bread/", "id": "iRMLQC_4pqw", "title": "15 Storing bread", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-15-storing-bread"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-16-legislators/", "id": "awGM1UAok_8", "title": "16 Legislators", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-16-legislators"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-17-nobel-prize/", "id": "p3fdeXgErns", "title": "17 Nobel prize", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-17-nobel-prize"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-18-sound-of-sap/", "id": "UV6mzD2Yc98", "title": "18 Sound of sap", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-18-sound-of-sap"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-19-selling-stock/", "id": "CGOIJdBXQno", "title": "19 Selling stock", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-19-selling-stock"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-20-mississippi-river/", "id": "KURufM070oI", "title": "20 Mississippi River", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-20-mississippi-river"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-21-air-pollutants/", "id": "Sbgha6LQLlY", "title": "21 Air pollutants", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-21-air-pollutants"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-22-car-headlights/", "id": "PpJMTpTukzE", "title": "22 Car headlights", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-22-car-headlights"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-23-greek-mythology/", "id": "TNACKWquyys", "title": "23 Greek mythology", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-23-greek-mythology"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-24-museum-funding/", "id": "v5Oz9kVptCY", "title": "24 Museum funding", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-24-museum-funding"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-25-shakespearean-character/", "id": "-ZS6FI24roY", "title": "25 Shakespearean character", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-25-shakespearean-character"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-26-inconsistent-science/", "id": "RDgF0F_9PwM", "title": "26 Inconsistent science", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-26-inconsistent-science"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-27-theories-of-evolution/", "id": "quBogKF8atM", "title": "27 Theories of evolution", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-27-theories-of-evolution"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-28-tall-structures/", "id": "1K5uvvz9c3M", "title": "28 Tall structures", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-28-tall-structures"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section5/sat-29-toxic-chemicals/", "id": "xljS9fFv3EU", "title": "29 Toxic chemicals", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-29-toxic-chemicals"}], "in_knowledge_map": false, "description": "Have you ever seen a sentence in a newspaper or on a restaurant menu that just wasn't quite right? In this section, you'll have lots of opportunities to find errors and fix 'em. \nSection 5 starts on pg. 54 of the downloadable test.\n\nWant even more writing practice? Check out the SAT Reading and Writing practice topic.", "node_slug": "SAT-test1-section5", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/full-length-SAT-1/SAT-test1-section5", "extended_slug": "test-prep/sat/full-length-SAT-1/SAT-test1-section5", "kind": "Topic", "slug": "sat-test1-section5"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/", "id": "SAT-test1-section6", "hide": false, "title": "Section 6", "child_data": [{"kind": "Video", "id": "x68bf4912"}, {"kind": "Video", "id": "x7a737e46"}, {"kind": "Video", "id": "x250af526"}, {"kind": "Video", "id": "x445b42bc"}, {"kind": "Video", "id": "x47a5c53c"}, {"kind": "Video", "id": "x89c615a5"}, {"kind": "Video", "id": "x2cc24a31"}, {"kind": "Video", "id": "x14e42de3"}, {"kind": "Video", "id": "x160aeb1c"}, {"kind": "Video", "id": "xb48d6bf3"}, {"kind": "Video", "id": "xf44da976"}, {"kind": "Video", "id": "x4ce34265"}, {"kind": "Video", "id": "xe5b93cd0"}, {"kind": "Video", "id": "x41cc7669"}, {"kind": "Video", "id": "x3075b300"}, {"kind": "Video", "id": "xbf77bf23"}, {"kind": "Video", "id": "x528d8a89"}, {"kind": "Video", "id": "x0f3e94a7"}], "children": [{"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-1/", "id": "H6RXlL7keGw", "title": "1 12th term in sequence", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-1"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-2/", "id": "nj3l2PbD8Cw", "title": "2 Possible values of x", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-2"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-3/", "id": "kZk3prERLec", "title": "3 Average of 4 numbers", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-3"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-4/", "id": "GvmZQXbWP3g", "title": "4 Kay's swimming brothers", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-4"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-5/", "id": "0boZOi9-U-k", "title": "5 Triangle angle measure", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-5"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-6/", "id": "g_agha5-Lhc", "title": "6 Equivalent expressions", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-6"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-7/", "id": "tbL-SRTtgq0", "title": "7 Figuring out angles", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-7"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-8/", "id": "Yo_zEyEBMmE", "title": "8 Comparing functions", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-8"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-9/", "id": "vIE8aYYsw8M", "title": "9 Magazine subscriptions", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-9"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-10/", "id": "LAUJuLEZ9HA", "title": "10 Setting up an equation", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-10"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-11/", "id": "3cccLMqZlcI", "title": "11 Book sales", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-11"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-12/", "id": "1rXISOamWNw", "title": "12 Solving for half of j", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-12"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-13/", "id": "wTy2EZZWDUo", "title": "13 Solving system for x+y", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-13"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-14/", "id": "_YxzwkCv0Ik", "title": "14 Trays with cups and plates", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-14"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-15/", "id": "3cHxWUnde6E", "title": "15 Slope of perpendicular line", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-15"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-16/", "id": "Gst4ys6eusM", "title": "16 Compound inequality with absolute value", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-16"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-17/", "id": "EKLGgTwyNfU", "title": "17 Product of primes near 50", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-17"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section6/2013-sat-practice-6-18/", "id": "tNZrKDq9Iqc", "title": "18 Area of rectangle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "2013-sat-practice-6-18"}], "in_knowledge_map": false, "description": "There are some really fun math problems in this section. Seriously. It all begins on pg. 60 in the downloadable SAT.\n\nWant even more math practice? Check out sections 2 and 8 and the SAT Math practice topic.", "node_slug": "SAT-test1-section6", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/full-length-SAT-1/SAT-test1-section6", "extended_slug": "test-prep/sat/full-length-SAT-1/SAT-test1-section6", "kind": "Topic", "slug": "sat-test1-section6"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/", "id": "SAT-test1-section8", "hide": false, "title": "Section 8", "child_data": [{"kind": "Video", "id": "x573c868d"}, {"kind": "Video", "id": "x6c15f55d"}, {"kind": "Video", "id": "xc34212fc"}, {"kind": "Video", "id": "xe352e37a"}, {"kind": "Video", "id": "x0968c501"}, {"kind": "Video", "id": "x13b40abc"}, {"kind": "Video", "id": "x6fd4df28"}, {"kind": "Video", "id": "x08aa195d"}, {"kind": "Video", "id": "x8010d9ea"}, {"kind": "Video", "id": "x929d4012"}, {"kind": "Video", "id": "x8d3b225a"}, {"kind": "Video", "id": "x8eaab8e4"}, {"kind": "Video", "id": "x58e7fd08"}, {"kind": "Video", "id": "x0a91fc42"}, {"kind": "Video", "id": "xa5f71fe9"}, {"kind": "Video", "id": "x433bd766"}, {"kind": "Video", "id": "xa3e14dca"}], "children": [{"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-1-running-distance/", "id": "fd1eLcFCxlE", "title": "1 Running distance", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-1-running-distance"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-2-solving-for-mk/", "id": "HSWheVsykiA", "title": "2 Solving for mk", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2-solving-for-mk"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-3-problem-solving/", "id": "AOOKe2ODlWM", "title": "3 Solving simple equation", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-3-problem-solving"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-4-polygon-perimeter/", "id": "pMZSDCm9tko", "title": "4 Polygon perimeter", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-4-polygon-perimeter"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-5-values-on-number-line/", "id": "EgtB1aF3MIU", "title": "5 Values on number line", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-5-values-on-number-line"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-6-possible-median-value/", "id": "KcFpkpHouPw", "title": "6 Possible median value", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-6-possible-median-value"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/maximum-distance-on-two-spheres/", "id": "PK4mJ2F9lvA", "title": "7 Maximum distance on two spheres", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "maximum-distance-on-two-spheres"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/total-videos-rented/", "id": "1h-EUy0Bybg", "title": "8 Total videos rented", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "total-videos-rented"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-9-similar-triangles/", "id": "kgsiYzcosDY", "title": "9 Similar triangles", "kind": "Video", "slug": "sat-9-similar-triangles"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/rope-cutting/", "id": "nFmH5iiPuDY", "title": "10 Rope cutting", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "rope-cutting"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-11-function-equaling-zero/", "id": "mx_JUo_s-Ok", "title": "11 Function equaling zero", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-11-function-equaling-zero"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-12-missing-angle/", "id": "SyFpQbnkg_c", "title": "12 Missing angle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-12-missing-angle"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-12-missing-angle-alt-solution/", "id": "7pqZj-83BuI", "title": "12 Missing angle alternate solution", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-12-missing-angle-alt-solution"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-13-possible-values-for-x/", "id": "rrUW4z5IVcQ", "title": "13 Possible values for x", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-13-possible-values-for-x"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-14-small-arc-length/", "id": "o8fYEZdTpEE", "title": "14 Small arc length", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-14-small-arc-length"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-15-equation-of-the-line/", "id": "Nwh4MUie74E", "title": "15 Equation of line", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-15-equation-of-the-line"}, {"path": "khan/test-prep/sat/full-length-sat-1/sat-test1-section8/sat-16-possible-values-for-t/", "id": "zOrkcZ1dlHk", "title": "16 Possible values for t", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-16-possible-values-for-t"}], "in_knowledge_map": false, "description": "More math practice coming your way in Section 8, starting on pg. 69 in the downloadable SAT.\n\nWant even more math practice? Check out sections 2 and 6 and the SAT Math practice topic.", "node_slug": "SAT-test1-section8", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/full-length-SAT-1/SAT-test1-section8", "extended_slug": "test-prep/sat/full-length-SAT-1/SAT-test1-section8", "kind": "Topic", "slug": "sat-test1-section8"}], "in_knowledge_map": false, "description": "Download and take a real, full-length practice test. Watch videos showing step-by-step solutions to problems you missed or found challenging, and get even more practice with unreleased questions from real SATs provided by College Board. \n\nAfter all that practice, it wouldn't hurt to take the full-length test again so you can get used to the feeling of answering all of the questions correctly. Rock on!", "node_slug": "full-length-SAT-1", "render_type": "Topic", "topic_page_url": "/test-prep/sat/full-length-SAT-1", "extended_slug": "test-prep/sat/full-length-SAT-1", "kind": "Topic", "slug": "full-length-sat-1"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/sat/sat-math-practice/", "id": "sat-math-practice", "hide": false, "title": "SAT Math practice", "child_data": [{"kind": "Topic", "id": "xaa28c84a"}, {"kind": "Topic", "id": "x1ed73f91"}, {"kind": "Topic", "id": "xfd068d26"}, {"kind": "Topic", "id": "xa73db713"}, {"kind": "Topic", "id": "x83f19347"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/", "id": "sat-math-level-1", "hide": false, "title": "SAT Math: Level 1", "child_data": [{"kind": "Exercise", "id": "xad8363a4"}, {"kind": "Video", "id": "x5a600897"}, {"kind": "Video", "id": "x8f528738"}, {"kind": "Video", "id": "x65ba59cb"}, {"kind": "Video", "id": "x2dcbfc75"}, {"kind": "Video", "id": "x349b6733"}, {"kind": "Video", "id": "xda59c297"}, {"kind": "Video", "id": "xfa05dc35"}, {"kind": "Video", "id": "xe598b334"}, {"kind": "Video", "id": "xa730561e"}, {"kind": "Video", "id": "xefc79b9d"}, {"kind": "Exercise", "id": "x9a2cd0ed"}, {"kind": "Video", "id": "xc9b39b56"}, {"kind": "Video", "id": "xca927f63"}, {"kind": "Video", "id": "xe6240a1a"}, {"kind": "Video", "id": "x3551c4d2"}, {"kind": "Video", "id": "x5e5c18f3"}, {"kind": "Video", "id": "x5ebf45c1"}, {"kind": "Video", "id": "xf62240f6"}, {"kind": "Video", "id": "x5a304ed4"}, {"kind": "Exercise", "id": "x34178dd0"}], "children": [{"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-math-level-1/", "id": "sat-math--level-1", "title": "SAT Math: Level 1 - Quiz 1", "slug": "sat-math-level-1", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-6-4/", "id": "OSrvGMacWD0", "title": "4 Rate of change in water tank", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-4"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-4-3/", "id": "uUxOGQ4VFWQ", "title": "3 Segment length PQ", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-3"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-6-5/", "id": "-ScrE9jd4Do", "title": "5 Equations that match constraints", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-5"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-4-1/", "id": "qyu2ubVNJNA", "title": "1 Square coordinates", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-1"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-may-4-2/", "id": "rhxDfbIjRNk", "title": "2 Distance from origin", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-may-4-2"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-may-2010-4-1/", "id": "lMfJSBsng3Y", "title": "1 Constructing and solving simple equation", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-may-2010-4-1"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-6-2/", "id": "ECcD0rR9Gws", "title": "2 Contradicting statement", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-2"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-9-4/", "id": "IMf5BbjpT1I", "title": "4 Weekly cookie inventory", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-4"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-4-6/", "id": "KKJ6FVCHalA", "title": "6 Divisibility of unknown number", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-6"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-6-1/", "id": "PLPNQMPDoNo", "title": "1 Missing angle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-1"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-math-level-1-part-2/", "id": "sat-math-level-1-part-2", "title": "SAT Math: Level 1 - Quiz 2", "slug": "sat-math-level-1-part-2", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-8-1/", "id": "UY5S4xntyRk", "title": "1 Rounding", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-1"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-4-4/", "id": "7Bxp98ChqT0", "title": "4 Negative numbers and absolute value", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-4"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-4-2/", "id": "vJyvTChDzeg", "title": "2 Sequence of numbers", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-2"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-9-01/", "id": "LJTJN1sqCHM", "title": "1 Unknown variable and operation", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-01"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2009-may-3-2/", "id": "sGYBfCVfl44", "title": "2 Solving for angle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-2"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2008-may-8-2/", "id": "Q_IXQZkMEAU", "title": "2 Solving for a", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-2"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2010-may-9-2/", "id": "VB_1AsmtFds", "title": "2 Coupon probability", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-2"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-2009-may-3-01/", "id": "XmswXY1IoMk", "title": "1 Student spending", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-01"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-1/sat-math-level-1-quiz-3/", "id": "sat-math-level-1-quiz-3", "title": "SAT Math: Level 1 - Quiz 3", "slug": "sat-math-level-1-quiz-3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, you'll find the SAT Math Practice: Level 1 exercise, featuring lots of previously-unreleased SAT math questions provided by College Board. Stuck on a problem? Check out videos where Sal solves each problem step by step. Let's do this!", "node_slug": "sat-math-level-1", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/sat-math-practice/sat-math-level-1", "extended_slug": "test-prep/sat/sat-math-practice/sat-math-level-1", "kind": "Topic", "slug": "sat-math-level-1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/", "id": "sat-math-level-2", "hide": false, "title": "SAT Math: Level 2", "child_data": [{"kind": "Exercise", "id": "x7f952e65"}, {"kind": "Video", "id": "x38ffe982"}, {"kind": "Video", "id": "x71d32ffc"}, {"kind": "Video", "id": "xf659f678"}, {"kind": "Video", "id": "x2158cab5"}, {"kind": "Video", "id": "x41eb724f"}, {"kind": "Video", "id": "xd2b80ce5"}, {"kind": "Video", "id": "x0c0f5037"}, {"kind": "Video", "id": "xc3ae385d"}, {"kind": "Video", "id": "xd650f0cd"}, {"kind": "Video", "id": "x8b14b739"}, {"kind": "Video", "id": "x39a01328"}, {"kind": "Exercise", "id": "x4b6d01c1"}, {"kind": "Video", "id": "x4458fffe"}, {"kind": "Video", "id": "x25ad87de"}, {"kind": "Video", "id": "xa0f7a457"}, {"kind": "Video", "id": "xb2e2e548"}, {"kind": "Video", "id": "x2e7c6ce4"}, {"kind": "Video", "id": "xc6c4ce6d"}, {"kind": "Video", "id": "xc4813201"}, {"kind": "Video", "id": "xe5d13ea5"}, {"kind": "Video", "id": "x8f142ddb"}, {"kind": "Video", "id": "xa7277501"}, {"kind": "Video", "id": "xae32cc6f"}, {"kind": "Video", "id": "xd5bf821a"}, {"kind": "Exercise", "id": "x271a2921"}], "children": [{"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-math-level-2/", "id": "sat-math--level-2", "title": "SAT Math: Level 2 - Quiz 1", "slug": "sat-math-level-2", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-4-5/", "id": "FyiwPshXyE8", "title": "5 Not a solution to an equation", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-5"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2009-may-3-4/", "id": "wPLKm-ho1Bw", "title": "4 Thinking about sets", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-4"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2008-may-8-6/", "id": "iqpIspc38TA", "title": "6 Carton quantity", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-6"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2009-may-3-9/", "id": "ZhFPZA35e3U", "title": "9 Angles between intersecting lines", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-9"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2008-may-4-5/", "id": "Wd7wQG9D-CE", "title": "5 Selling tickets", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-5"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2009-may-3-12/", "id": "uXZ_P_LOKPQ", "title": "12 Percent of toy sales", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-12"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-may-4-3/", "id": "eQjpTvM4lR0", "title": "3 Letter in pattern", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-may-4-3"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2008-may-4-8/", "id": "Kox-FerE8AY", "title": "8 Area of inscribed circle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-8"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2008-may-4-7/", "id": "ZvLo4bGRJQE", "title": "7 Solution to simultaneous equations", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-7"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-9-5/", "id": "wXhkMvUXskE", "title": "5 Angle in triangle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-5"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2008-may-4-9/", "id": "HXy34-mIPuI", "title": "9 Evaluating expression in 2 variables", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-9"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-math-level-2-part-2/", "id": "sat-math-level-2-part-2", "title": "SAT math: Level 2 - Quiz 2", "slug": "sat-math-level-2-part-2", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-4-3/", "id": "tLQURiMoLcA", "title": "4 Equivalent rental costs", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-3"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-9-6/", "id": "YhxVBHKB-oY", "title": "6 y intercept", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-6"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-6-3/", "id": "Mboz5JIIwSU", "title": "3 Value of 2 variable expression", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-3"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-4-11/", "id": "884SpJ-22Bc", "title": "11 Survey results", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-11"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-9-3/", "id": "Zny3nM8V-D4", "title": "3 Distance to reflected point", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-3"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-9-7/", "id": "tkJZCP-FMPE", "title": "7 Circumference of circle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-7"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2009-may-3-10/", "id": "WdSxjy-KkZY", "title": "10 Maximizing game tokens", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-10"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2008-may-8-3/", "id": "E3vXfrKaoCY", "title": "3 Triangle angles", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-3"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-6-6/", "id": "CFZv-UnbHLA", "title": "6 Area of shaded region", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-6"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-4-9/", "id": "CPIS3JBcE2s", "title": "9 Calculating hourly rate", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-9"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-5-distance-between-points/", "id": "EMyHmzVOgbM", "title": "5 Distance between points", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-5-distance-between-points"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-2010-may-6-8/", "id": "IjiHwNLYLcM", "title": "8 Solving for proportionality constant", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-8"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-2/sat-math-level-2-quiz-3/", "id": "sat-math-level-2-quiz-3", "title": "SAT Math: Level 2 - Quiz 3", "slug": "sat-math-level-2-quiz-3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, you'll find the SAT Math Practice: Level 2 exercise, featuring lots of previously-unreleased SAT math questions provided by College Board. Stuck on a problem? Check out videos where Sal solves each problem step by step. Here we go!", "node_slug": "sat-math-level-2", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/sat-math-practice/sat-math-level-2", "extended_slug": "test-prep/sat/sat-math-practice/sat-math-level-2", "kind": "Topic", "slug": "sat-math-level-2"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/", "id": "sat-math-level-3", "hide": false, "title": "SAT Math: Level 3", "child_data": [{"kind": "Exercise", "id": "xb6537ed1"}, {"kind": "Video", "id": "x88fe2eda"}, {"kind": "Video", "id": "x24215e2e"}, {"kind": "Video", "id": "x78b7877e"}, {"kind": "Video", "id": "x1d3381e1"}, {"kind": "Video", "id": "x0d41c975"}, {"kind": "Video", "id": "x8126dae7"}, {"kind": "Video", "id": "x5b31b5be"}, {"kind": "Video", "id": "x254096b0"}, {"kind": "Video", "id": "x04e3f3ec"}, {"kind": "Video", "id": "xd208fc07"}, {"kind": "Video", "id": "x85221c6e"}, {"kind": "Exercise", "id": "x56151508"}, {"kind": "Video", "id": "xbe8427d9"}, {"kind": "Video", "id": "x0ec0d208"}, {"kind": "Video", "id": "x0326b9db"}, {"kind": "Video", "id": "xa37f4a0a"}, {"kind": "Video", "id": "x8842bca0"}, {"kind": "Video", "id": "x44d3fa75"}, {"kind": "Video", "id": "xe7f3c736"}, {"kind": "Video", "id": "xac50fb7d"}, {"kind": "Video", "id": "x7237b81b"}, {"kind": "Video", "id": "xad736a2b"}, {"kind": "Video", "id": "x5d13a66d"}, {"kind": "Exercise", "id": "xf3b55bd0"}, {"kind": "Video", "id": "x92b0eb12"}, {"kind": "Video", "id": "xeb4d8fb1"}, {"kind": "Video", "id": "x64ed4c99"}, {"kind": "Video", "id": "x468e7c96"}, {"kind": "Video", "id": "x262efc0c"}, {"kind": "Video", "id": "xbc6e5a79"}, {"kind": "Video", "id": "xe7dd4ceb"}, {"kind": "Video", "id": "x7162b8c1"}, {"kind": "Video", "id": "xfadb30e4"}, {"kind": "Video", "id": "x864bcdc2"}, {"kind": "Video", "id": "x17271447"}, {"kind": "Exercise", "id": "xd31515cb"}, {"kind": "Video", "id": "x91becda5"}, {"kind": "Exercise", "id": "x6ebf5b15"}], "children": [{"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-math-level-3/", "id": "sat-math--level-3", "title": "SAT Math: Level 3 - Quiz 1", "slug": "sat-math-level-3", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-9/", "id": "WjfWCyEt07M", "title": "9 Perfect squares in set", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-9"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-4-10/", "id": "ZHkO4p8Ec0o", "title": "10 Trucks in parking lot", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-10"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-14/", "id": "1Y39f7MAL5I", "title": "14 Running distance ratio", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-14"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-11/", "id": "eSXvvUmu7II", "title": "11 Allowance savings", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-11"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-4-14/", "id": "kio82CqAEMw", "title": "14 Least possible value for variable", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-14"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-6/", "id": "J0u_MugpslU", "title": "6 Solving for 2x", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-6"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-7/", "id": "6e0LyXQJoW4", "title": "7 Perimeter", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-7"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-4-12/", "id": "EYyYjwp10cM", "title": "12 Composite functions", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-12"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-3/", "id": "ISGFo8t0a4c", "title": "3 Solving inequality", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-3"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-14/", "id": "pXWPtZVFk9k", "title": "14 Substituting variables", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-14"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-10/", "id": "1jWJQkxZiiU", "title": "10 Adding numbers in different representations", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-10"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-math-level-3-part-2/", "id": "sat-math-level-3-part-2", "title": "SAT math: Level 3 - Quiz 2", "slug": "sat-math-level-3-part-2", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-8-10-11/", "id": "cjYHo2tS9sQ", "title": "10 11 Calling plan", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-10-11"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-12/", "id": "a-LoetNvu0U", "title": "11 Bacteria in a dish", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-12"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-8/", "id": "74XxAsDmUaM", "title": "8 More unknowns than equations", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-8"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-10/", "id": "KIFdiufU8lc", "title": "10 Finding angle measure", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-10"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-4-16/", "id": "I1KmEWmmozc", "title": "16 Shortest path", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-16"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-7/", "id": "QCTKPkemffw", "title": "7 Fraction as percent", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-7"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-12/", "id": "9YyLwzJunGw", "title": "12 Corresponding side lengths", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-12"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-9/", "id": "d4FklnPgjv8", "title": "9 quadrilateral area", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-9"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-8-9/", "id": "U8GzssRfVMc", "title": "9 Painting red cubes blue", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-9"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-5/", "id": "E2bu4bG9yw8", "title": "5 Missing information", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-5"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-4-11/", "id": "1hihcoJPzz0", "title": "11 Computing with set members", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-11"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-math-level-3-part-3/", "id": "sat-math-level-3-part-3", "title": "SAT Math: Level 3 - Quiz 3", "slug": "sat-math-level-3-part-3", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-15/", "id": "pNBxj5ad8G4", "title": "15 Right triangle side lengths", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-15"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-9-13/", "id": "XHd7Ng45Vxk", "title": "13 Exponent properties to simplify expression", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-13"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-11/", "id": "6JQNEww5DF8", "title": "12 Equivalent expressions", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-11"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-4-15/", "id": "Iarv4xiYFA4", "title": "15 Area of tilted square", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-15"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-4-12/", "id": "NYEVx5QFavU", "title": "12 Triangle angles", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-12"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-6-13/", "id": "Wnz0vrmsRfk", "title": "13 Least possible value of z", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-13"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2010-may-4-13/", "id": "kpxe-xbVyK8", "title": "13 Triangle angles", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-13"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2009-may-3-11/", "id": "K8wwaXkT29Y", "title": "11 Solving for parabola constant", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-11"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-8-7/", "id": "PixZzV4Iz1M", "title": "7 Area of the shaded region", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-7"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-8-13/", "id": "fGwSr7AolMI", "title": "13 Strange function definition", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-13"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-8-4/", "id": "k-y6Hu6TUwA", "title": "4 y exceeding x", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-4"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-math-level-3-part-4/", "id": "sat-math-level-3-part-4", "title": "SAT Math: Level 3 - Quiz 4", "slug": "sat-math-level-3-part-4", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-2008-may-8-8/", "id": "EFB9JrBW4ro", "title": "8 Mathematical expression from words", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-8"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-3/sat-math-level-3-quiz-5/", "id": "sat-math-level-3-quiz-5", "title": "SAT Math: Level 3 - Quiz 5", "slug": "sat-math-level-3-quiz-5", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, you'll find the SAT Math Practice: Level 3 exercise, featuring lots of previously-unreleased SAT math questions provided by College Board. Stuck on a problem? Check out videos where Sal solves each problem step by step. Congrats on venturing into level 3 territory. You've got this!", "node_slug": "sat-math-level-3", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/sat-math-practice/sat-math-level-3", "extended_slug": "test-prep/sat/sat-math-practice/sat-math-level-3", "kind": "Topic", "slug": "sat-math-level-3"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/", "id": "sat-math-level-4", "hide": false, "title": "SAT Math: Level 4", "child_data": [{"kind": "Exercise", "id": "x310cc859"}, {"kind": "Video", "id": "xb0177bf4"}, {"kind": "Video", "id": "x8476e63b"}, {"kind": "Video", "id": "x5c22286b"}, {"kind": "Video", "id": "x7c0da17a"}, {"kind": "Video", "id": "x4c0b74b9"}, {"kind": "Video", "id": "x3ca0482d"}, {"kind": "Video", "id": "xe1fd44d4"}, {"kind": "Video", "id": "x2ce2a894"}, {"kind": "Video", "id": "x83d64dfc"}, {"kind": "Video", "id": "x0cde7594"}, {"kind": "Video", "id": "xa479e17b"}, {"kind": "Exercise", "id": "x7897014a"}, {"kind": "Video", "id": "xbbf4b83e"}, {"kind": "Video", "id": "xdaabfe85"}, {"kind": "Video", "id": "xf5235f9e"}, {"kind": "Video", "id": "xd6c7db03"}, {"kind": "Video", "id": "x4904011b"}, {"kind": "Video", "id": "x83c4890e"}, {"kind": "Video", "id": "xda3a4de0"}, {"kind": "Video", "id": "x1455bc7e"}, {"kind": "Video", "id": "x7b6e585c"}, {"kind": "Exercise", "id": "x695f3c45"}], "children": [{"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-math-level-4/", "id": "sat-math--level-4", "title": "SAT Math: Level 4 - Quiz 1", "slug": "sat-math-level-4", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-4-14/", "id": "utdhIMzR6XM", "title": "14 Bread combinations", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-14"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-4-8/", "id": "h6Bprry-E20", "title": "8 Least possible value for variable", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-8"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-6-16/", "id": "xy3DfucAxdQ", "title": "16 Satisfying constraints", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-16"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-6-19/", "id": "8AkQvv-uceg", "title": "19 True statements based on constraints", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-19"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-4-7/", "id": "mvoE6HYzBdY", "title": "7 Coordinate on number line", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-7"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-9-14/", "id": "CMj-_-IUJQU", "title": "14 Graph of function absolute value", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-14"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-4-17/", "id": "VNfASWRrTYY", "title": "17 Number of rectangular solids to make cubic meter", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-17"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-6-20/", "id": "X2Z63GnMNDw", "title": "20 Slope between points", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-20"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-4-6/", "id": "1-AaLq7VS0s", "title": "6 Area of small circles", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-6"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-4-16/", "id": "TvP1ydWhDjk", "title": "16 Finding function constant", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-16"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2010-may-9-15/", "id": "FERlpfxuS6o", "title": "15 Linear model", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-15"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-math-level-4-quiz-2/", "id": "sat-math-level-4-quiz-2", "title": "SAT Math: Level 4 - Quiz 2", "slug": "sat-math-level-4-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2008-may-4-13/", "id": "dAMNo4u6Ogc", "title": "13 Exponential growth", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-13"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2008-may-8-14/", "id": "zmQrI4786cc", "title": "14 Equation of diameter of circle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-14"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2008-may-4-17/", "id": "AwulrWkLy3Q", "title": "17 Intersection of perpendicular lines", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-17"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2009-may-3-17/", "id": "dJAc0mc9VYo", "title": "17 Fraction of circumference", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-17"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2008-may-4-15/", "id": "hu067I_BcGc", "title": "15 Median of 5 consecutive integers", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-15"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2008-may-8-15/", "id": "-MYh3s__qlA", "title": "15 Sums of terms in a sequence", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-15"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2009-may-3-15/", "id": "xIg420bVAcc", "title": "15 Embedded square dimensions", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-15"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2008-may-8-12/", "id": "ZeHRxcAS2Gc", "title": "12 Estimating number products", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-12"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-2009-may-3-16/", "id": "A5lggKwX4Zw", "title": "16 Seating assignments", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-16"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-4/sat-math-level-4-quiz-3/", "id": "sat-math-level-4-quiz-3", "title": "SAT Math: Level 4 - Quiz 3", "slug": "sat-math-level-4-quiz-3", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this tutorial, you'll find the SAT Math Practice: Level 4 exercise, featuring lots of previously-unreleased SAT math questions provided by College Board. Stuck on a problem? Check out videos where Sal solves each problem step by step. You're tackling some of the harder SAT Math problems now. Rock it out!", "node_slug": "sat-math-level-4", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/sat-math-practice/sat-math-level-4", "extended_slug": "test-prep/sat/sat-math-practice/sat-math-level-4", "kind": "Topic", "slug": "sat-math-level-4"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/", "id": "sat-math-level-5", "hide": false, "title": "SAT Math: Level 5", "child_data": [{"kind": "Exercise", "id": "xdf7ec53c"}, {"kind": "Video", "id": "x4f0d384d"}, {"kind": "Video", "id": "x7b8322ef"}, {"kind": "Video", "id": "x28849dc8"}, {"kind": "Video", "id": "x6bf423d5"}, {"kind": "Video", "id": "xc30cdfa5"}, {"kind": "Video", "id": "xda0eb705"}, {"kind": "Video", "id": "xf79932ad"}, {"kind": "Video", "id": "xee23175e"}, {"kind": "Exercise", "id": "x272f9817"}, {"kind": "Video", "id": "xfc050032"}, {"kind": "Video", "id": "xbe8427d9"}, {"kind": "Video", "id": "x4f3fefc6"}], "children": [{"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-math-level-5/", "id": "sat-math--level-5", "title": "SAT Math: Level 5 - Quiz 1", "slug": "sat-math-level-5", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2010-may-4-18/", "id": "ZuUWp0-gBMU", "title": "18 Greatest number meeting constraints", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-4-18"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2010-may-6-17/", "id": "3w_5eYUB6zY", "title": "17 Sum of terms in sequence", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-17"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2010-may-6-18/", "id": "GfUKL30pG08", "title": "18 Median mileage", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-6-18"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2010-may-9-1/", "id": "xrAalIDOBoY", "title": "16 Writing compound inequality", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2010-may-9-1"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2009-may-3-8/", "id": "RbLcxozAfeY", "title": "8 Pounds of muscle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-8"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2009-may-3-1/", "id": "fslMG-pmCeU", "title": "18 Functions", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2009-may-3-1"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2008-may-4-18/", "id": "V6bs91KND8E", "title": "18 Average tree height", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-18"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2008-may-4-19/", "id": "-dADFDGte6g", "title": "19 Function truth", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-19"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-math-level-5-quiz-2/", "id": "sat-math-level-5-quiz-2", "title": "SAT Math: Level 5 - Quiz 2", "slug": "sat-math-level-5-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2008-may-4-20/", "id": "YlZYarC598c", "title": "20 Solving for variable", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-4-20"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2008-may-8-10-11/", "id": "cjYHo2tS9sQ", "title": "10 11 Calling plan", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-10-11"}, {"path": "khan/test-prep/sat/sat-math-practice/sat-math-level-5/sat-2008-may-8-16/", "id": "J-o63pl0QWg", "title": "16 Perimeter of inscribed triangle", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2008-may-8-16"}], "in_knowledge_map": false, "description": "In this tutorial, you'll find the SAT Math Practice: Level 5 exercise, featuring lots of previously-unreleased SAT math questions provided by College Board. Stuck on a problem? Check out videos where Sal solves each problem step by step. These are the hardest math problems on the SAT. Eye of the tiger!", "node_slug": "sat-math-level-5", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/sat-math-practice/sat-math-level-5", "extended_slug": "test-prep/sat/sat-math-practice/sat-math-level-5", "kind": "Topic", "slug": "sat-math-level-5"}], "in_knowledge_map": false, "description": "In these tutorials, you'll get the chance to practice solving tons of real, previously-unreleased SAT Math problems provided by College Board.\n\nThe exercises are split by difficulty level on the SAT and accompanied by short videos showing one way to solve each problem. \n\nOnward!", "node_slug": "sat-math-practice", "render_type": "Topic", "topic_page_url": "/test-prep/sat/sat-math-practice", "extended_slug": "test-prep/sat/sat-math-practice", "kind": "Topic", "slug": "sat-math-practice"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/sat/sat-reading-writing-practice/", "id": "sat-reading-writing-practice", "hide": false, "title": "SAT Reading and Writing practice", "child_data": [{"kind": "Topic", "id": "x25d500d0"}, {"kind": "Topic", "id": "xa796fd28"}, {"kind": "Topic", "id": "x13251e27"}, {"kind": "Topic", "id": "xe613878c"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/test-prep/sat/sat-reading-writing-practice/sat-writing-id-sentence-errors/", "id": "SAT-writing-id-sentence-errors", "hide": false, "title": "SAT Writing: Identifying sentence errors", "child_data": [{"kind": "Exercise", "id": "x9bed6401"}, {"kind": "Exercise", "id": "x30c26adb"}], "children": [{"path": "khan/test-prep/sat/sat-reading-writing-practice/sat-writing-id-sentence-errors/sat-writing-identifying-sentence-errors/", "id": "sat-writing--identifying-sentence-errors", "title": "SAT Writing: Identifying sentence errors", "slug": "sat-writing-identifying-sentence-errors", "kind": "Exercise"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/sat-writing-id-sentence-errors/sat-writing-improving-sentences/", "id": "sat-writing--improving-sentences", "title": "SAT Writing: Improving sentences", "slug": "sat-writing-improving-sentences", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "SAT-writing-id-sentence-errors", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/sat-reading-writing-practice/SAT-writing-id-sentence-errors", "extended_slug": "test-prep/sat/sat-reading-writing-practice/SAT-writing-id-sentence-errors", "kind": "Topic", "slug": "sat-writing-id-sentence-errors"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/test-prep/sat/sat-reading-writing-practice/sat-reading-sentence-completion/", "id": "SAT-reading-sentence-completion", "hide": false, "title": "SAT Reading: Sentence completion", "child_data": [{"kind": "Exercise", "id": "x54709a30"}], "children": [{"path": "khan/test-prep/sat/sat-reading-writing-practice/sat-reading-sentence-completion/sat-reading-sentence-completion/", "id": "sat-reading--sentence-completion", "title": "SAT Reading: Sentence completion", "slug": "sat-reading-sentence-completion", "kind": "Exercise"}], "in_knowledge_map": false, "description": "", "node_slug": "SAT-reading-sentence-completion", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/sat-reading-writing-practice/SAT-reading-sentence-completion", "extended_slug": "test-prep/sat/sat-reading-writing-practice/SAT-reading-sentence-completion", "kind": "Topic", "slug": "sat-reading-sentence-completion"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/", "id": "full-length-SAT-test1-section3", "hide": false, "title": "Full-length SAT: Section 3", "child_data": [{"kind": "Video", "id": "x6b7a42ed"}, {"kind": "Video", "id": "x5b4f193c"}, {"kind": "Video", "id": "xd7e9b12c"}, {"kind": "Video", "id": "x08e004e5"}, {"kind": "Video", "id": "x8e6ad9ac"}], "children": [{"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/sat-1-private-universities/", "id": "Jts_mdQmbUg", "title": "1 Private universities", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-1-private-universities"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/sat-2-defying-oppression/", "id": "rai9hJOGJLE", "title": "2 Defying oppression", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2-defying-oppression"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/sat-3-camouflage/", "id": "FBn1RlGfdzg", "title": "3 Camouflage", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-3-camouflage"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/sat-4-economists/", "id": "arWBWBfNMB8", "title": "4 Economists", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-4-economists"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section3/sat-5-home-colors/", "id": "MOoGlIpNLkM", "title": "5 Home colors", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-5-home-colors"}], "in_knowledge_map": false, "description": "For more Reading practice, download a full-length SAT and do the questions in section 3. Then watch Sal think through the sentence completion questions from section 3, starting on pg. 48 of the downloadable SAT.\n\nLooking for the downloadable full-length SAT? Check out the Full-length SAT topic.", "node_slug": "full-length-SAT-test1-section3", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/sat-reading-writing-practice/full-length-SAT-test1-section3", "extended_slug": "test-prep/sat/sat-reading-writing-practice/full-length-SAT-test1-section3", "kind": "Topic", "slug": "full-length-sat-test1-section3"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/", "id": "full-length-SAT-test1-section5", "hide": false, "title": "Full-length SAT: Section 5", "child_data": [{"kind": "Video", "id": "x06685418"}, {"kind": "Video", "id": "xf265dd7d"}, {"kind": "Video", "id": "xa114da01"}, {"kind": "Video", "id": "x67047a96"}, {"kind": "Video", "id": "x1fc9a79b"}, {"kind": "Video", "id": "xe1c3192e"}, {"kind": "Video", "id": "x511508ce"}, {"kind": "Video", "id": "xaeae2fe4"}, {"kind": "Video", "id": "xc915ca3c"}, {"kind": "Video", "id": "xb7f3cf6e"}, {"kind": "Video", "id": "x1f7c57eb"}, {"kind": "Video", "id": "xb63073d9"}, {"kind": "Video", "id": "x94c8aea0"}, {"kind": "Video", "id": "xe37d43e2"}, {"kind": "Video", "id": "xed62a2a3"}, {"kind": "Video", "id": "x10c1a46e"}, {"kind": "Video", "id": "x07536c9f"}, {"kind": "Video", "id": "x157c34c5"}, {"kind": "Video", "id": "x5e642749"}, {"kind": "Video", "id": "x233987bd"}, {"kind": "Video", "id": "x0eaf6572"}, {"kind": "Video", "id": "xbac354f0"}, {"kind": "Video", "id": "xc62ceda9"}, {"kind": "Video", "id": "xe4a219a6"}, {"kind": "Video", "id": "x8863d21b"}, {"kind": "Video", "id": "x6b4c2c93"}, {"kind": "Video", "id": "x30a5a234"}, {"kind": "Video", "id": "xbbe8bc69"}, {"kind": "Video", "id": "x35d0db68"}], "children": [{"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-1-working-at-convenience-store/", "id": "5OYIXxNz6Xk", "title": "1 Working at convenience store", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-1-working-at-convenience-store"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-2-course-reviews/", "id": "DTF2qg2McwY", "title": "2 Course reviews", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-2-course-reviews"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-3-central-park/", "id": "Bv_3hBUTOk4", "title": "3 Central Park", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-3-central-park"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-4-roaming-deer/", "id": "sCHiJVnyo4g", "title": "4 Roaming deer", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-4-roaming-deer"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-5-book-costs/", "id": "1_ymCFwbGGY", "title": "5 Book costs", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-5-book-costs"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/6-sea-islands/", "id": "IHEPNJJlGT4", "title": "6 Sea Islands", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "6-sea-islands"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-7-dramatic-monologue/", "id": "Aa0l_P0K5fs", "title": "7 Dramatic monologue", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-7-dramatic-monologue"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-8-romantic-poets/", "id": "l5xbFna_j0Q", "title": "8 Romantic poets", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-8-romantic-poets"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-9-constitutional-convention/", "id": "gh_3hch2YNM", "title": "9 Constitutional Convention", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-9-constitutional-convention"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-10-oil-imports/", "id": "oapNz_NNGh4", "title": "10 Oil imports", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-10-oil-imports"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-11-love-and-marriage/", "id": "pWSq7CGh9tg", "title": "11 Love and marriage", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-11-love-and-marriage"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-12-roller-coaster/", "id": "Kwk62Xw6YHU", "title": "12 Roller coaster", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-12-roller-coaster"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-13-inflation-rate/", "id": "wgnJevkTEdw", "title": "13 Inflation rate", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-13-inflation-rate"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/14-apparel-manufacturers/", "id": "QnWQezGy1Tc", "title": "14 Apparel manufacturers", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "14-apparel-manufacturers"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-15-storing-bread/", "id": "iRMLQC_4pqw", "title": "15 Storing bread", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-15-storing-bread"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-16-legislators/", "id": "awGM1UAok_8", "title": "16 Legislators", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-16-legislators"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-17-nobel-prize/", "id": "p3fdeXgErns", "title": "17 Nobel prize", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-17-nobel-prize"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-18-sound-of-sap/", "id": "UV6mzD2Yc98", "title": "18 Sound of sap", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-18-sound-of-sap"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-19-selling-stock/", "id": "CGOIJdBXQno", "title": "19 Selling stock", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-19-selling-stock"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-20-mississippi-river/", "id": "KURufM070oI", "title": "20 Mississippi River", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-20-mississippi-river"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-21-air-pollutants/", "id": "Sbgha6LQLlY", "title": "21 Air pollutants", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-21-air-pollutants"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-22-car-headlights/", "id": "PpJMTpTukzE", "title": "22 Car headlights", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-22-car-headlights"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-23-greek-mythology/", "id": "TNACKWquyys", "title": "23 Greek mythology", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-23-greek-mythology"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-24-museum-funding/", "id": "v5Oz9kVptCY", "title": "24 Museum funding", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-24-museum-funding"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-25-shakespearean-character/", "id": "-ZS6FI24roY", "title": "25 Shakespearean character", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-25-shakespearean-character"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-26-inconsistent-science/", "id": "RDgF0F_9PwM", "title": "26 Inconsistent science", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-26-inconsistent-science"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-27-theories-of-evolution/", "id": "quBogKF8atM", "title": "27 Theories of evolution", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-27-theories-of-evolution"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-28-tall-structures/", "id": "1K5uvvz9c3M", "title": "28 Tall structures", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-28-tall-structures"}, {"path": "khan/test-prep/sat/sat-reading-writing-practice/full-length-sat-test1-section5/sat-29-toxic-chemicals/", "id": "xljS9fFv3EU", "title": "29 Toxic chemicals", "kind": "Video", "description": "This video features an official SAT practice question provided by the College Board.", "slug": "sat-29-toxic-chemicals"}], "in_knowledge_map": false, "description": "For more Writing practice, download a full-length SAT and do the questions in section 5. Then watch Sal think through the identifying sentence errors and improving sentences questions from section 5, starting on pg. 54 of the downloadable SAT.\n\nLooking for the downloadable full-length SAT? Check out the Full-length SAT topic.", "node_slug": "full-length-SAT-test1-section5", "render_type": "Tutorial", "topic_page_url": "/test-prep/sat/sat-reading-writing-practice/full-length-SAT-test1-section5", "extended_slug": "test-prep/sat/sat-reading-writing-practice/full-length-SAT-test1-section5", "kind": "Topic", "slug": "full-length-sat-test1-section5"}], "in_knowledge_map": false, "description": "In these tutorials, you'll get the chance to practice with tons of real, previously-unreleased SAT Reading and Writing problems provided by College Board.\n\nYou'll find exercises on three of the SAT Reading and Writing question types: sentence completion, identifying sentence errors, and improving sentences.\n\nOnward!", "node_slug": "sat-reading-writing-practice", "render_type": "Topic", "topic_page_url": "/test-prep/sat/sat-reading-writing-practice", "extended_slug": "test-prep/sat/sat-reading-writing-practice", "kind": "Topic", "slug": "sat-reading-writing-practice"}], "in_knowledge_map": false, "description": "Download a real, full-length SAT practice test, watch Sal work through real SAT problems, and get even more practice using our interactive questions.", "node_slug": "sat", "render_type": "Subject", "topic_page_url": "/test-prep/sat", "extended_slug": "test-prep/sat", "kind": "Topic", "slug": "sat"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/new-sat/", "id": "new-sat", "hide": false, "title": "New SAT (starting March 2016)", "child_data": [{"kind": "Topic", "id": "xc713bf7e"}, {"kind": "Topic", "id": "x8503110a"}, {"kind": "Topic", "id": "xe5c03d8f"}, {"kind": "Topic", "id": "x0e08d2c0"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/new-sat/new-sat-reading-writing/", "id": "new-sat-reading-writing", "hide": false, "title": "Reading & Writing", "child_data": [{"kind": "Topic", "id": "xf1fc0665"}, {"kind": "Topic", "id": "x8bab2759"}, {"kind": "Topic", "id": "xda8dfc0f"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/", "id": "new-sat-reading", "hide": false, "title": "Reading", "child_data": [{"kind": "Video", "id": "xd84ed515"}, {"kind": "Video", "id": "x994a68f7"}, {"kind": "Video", "id": "x9e76d2ed"}, {"kind": "Video", "id": "x5a9f9d74"}, {"kind": "Video", "id": "xbb0443be"}, {"kind": "Video", "id": "x33baa46d"}, {"kind": "Video", "id": "xc53c27d4"}, {"kind": "Video", "id": "x72f18439"}], "children": [{"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-science-passage/", "id": "HJg_7bjGbX0", "title": "Reading: Science \u2014 How-to Part 1", "kind": "Video", "description": "Watch Sal work through Part 1 of an SAT Reading: Science passage.", "slug": "reading-science-passage"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-science-questions/", "id": "KXwYPD090Tg", "title": "Reading: Science \u2014 How-to Part 2", "kind": "Video", "description": "Watch Sal work through Part 2 of an SAT Reading: Science passage.", "slug": "reading-science-questions"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-literature-passage/", "id": "1jLELrXiIxA", "title": "Reading: Literature \u2014 How-to Part 1", "kind": "Video", "description": "Watch Sal work through Part 1 of an SAT Reading: Literature passage.", "slug": "reading-literature-passage"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-literature-questions/", "id": "LxnX9-xUMvs", "title": "Reading: Literature \u2014 How-to Part 2", "kind": "Video", "description": "Watch Sal work through Part 2 of an SAT Reading: Literature passage.", "slug": "reading-literature-questions"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-history-passage/", "id": "ELgQQjRhkic", "title": "Reading: History and social studies \u2014 How-to Part 1", "kind": "Video", "description": "Watch Sal work through Part 1 of an SAT Reading: History and social studies passage.", "slug": "reading-history-passage"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-history-questions/", "id": "duyYnXIhg4w", "title": "Reading: History and social studies \u2014 How-to Part 2", "kind": "Video", "description": "Watch Sal work through Part 2 of an SAT Reading: History and social studies passage.", "slug": "reading-history-questions"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-social-science-passage/", "id": "ibcyx9vaYFk", "title": "Reading: Social science \u2014 How-to Part 1", "kind": "Video", "description": "Watch Sal work through Part 1 of an SAT Reading: Social science passage.", "slug": "reading-social-science-passage"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-reading/reading-social-science-questions/", "id": "yKgp0BYKXlo", "title": "Reading: Social science \u2014 How-to Part 2", "kind": "Video", "description": "Watch Sal work through Part 2 of an SAT Reading: Social science passage.", "slug": "reading-social-science-questions"}], "in_knowledge_map": false, "description": "", "node_slug": "new-sat-reading", "render_type": "Tutorial", "topic_page_url": "/test-prep/new-sat/new-sat-reading-writing/new-sat-reading", "extended_slug": "test-prep/new-sat/new-sat-reading-writing/new-sat-reading", "kind": "Topic", "slug": "new-sat-reading"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-passages/", "id": "new-sat-writing-passages", "hide": false, "title": "Writing: Passages", "child_data": [{"kind": "Video", "id": "x9f5ef2c0"}, {"kind": "Video", "id": "x5ee3d74f"}, {"kind": "Video", "id": "x99cfe25b"}], "children": [{"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-passages/sat-writing-argument-passage/", "id": "9slylqZ1MOk", "title": "Writing: Argument \u2014 How-to example", "kind": "Video", "description": "Watch Sal work through an SAT Writing: Argument passage.", "slug": "sat-writing-argument-passage"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-passages/sat-writing-informational-passage/", "id": "PP61GER5vno", "title": "Writing: Informative \u2014 How-to example", "kind": "Video", "description": "Watch Sal work through an SAT Writing: Informative passage.", "slug": "sat-writing-informational-passage"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-passages/sat-writing-narrative/", "id": "cnhSTcjanLc", "title": "Writing: Narrative \u2014 How-to example", "kind": "Video", "description": "Watch Sal work through an SAT Writing: Narrative passage.", "slug": "sat-writing-narrative"}], "in_knowledge_map": false, "description": "", "node_slug": "new-sat-writing-passages", "render_type": "Tutorial", "topic_page_url": "/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-passages", "extended_slug": "test-prep/new-sat/new-sat-reading-writing/new-sat-writing-passages", "kind": "Topic", "slug": "new-sat-writing-passages"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/", "id": "new-sat-writing-grammar", "hide": false, "title": "Writing: Grammar", "child_data": [{"kind": "Video", "id": "xd20176f2"}, {"kind": "Video", "id": "x7c44cd31"}, {"kind": "Video", "id": "x352f4a4c"}, {"kind": "Video", "id": "x97f38767"}, {"kind": "Video", "id": "xd2d5c2a5"}, {"kind": "Video", "id": "x32b46b61"}, {"kind": "Video", "id": "xf6c202cf"}, {"kind": "Video", "id": "x14c1bd9e"}, {"kind": "Video", "id": "x38d2058c"}, {"kind": "Video", "id": "xe660734c"}, {"kind": "Video", "id": "x6370cd5a"}, {"kind": "Video", "id": "x241a7306"}, {"kind": "Video", "id": "xc8cd7a38"}, {"kind": "Video", "id": "xb75e8517"}, {"kind": "Video", "id": "x7001c6f1"}, {"kind": "Video", "id": "x1951eb2d"}, {"kind": "Video", "id": "x8760b517"}, {"kind": "Video", "id": "x2b0a4433"}, {"kind": "Video", "id": "x4a3dcb65"}, {"kind": "Video", "id": "x10df9b27"}, {"kind": "Video", "id": "x758092a8"}, {"kind": "Video", "id": "xc4ee0503"}, {"kind": "Video", "id": "xcd4a1e56"}, {"kind": "Video", "id": "x38eeee09"}, {"kind": "Video", "id": "x2d12e02f"}, {"kind": "Video", "id": "xd393c2dc"}, {"kind": "Video", "id": "x38b84489"}, {"kind": "Video", "id": "xc77735c2"}, {"kind": "Video", "id": "xb19ffe8a"}, {"kind": "Video", "id": "xe76af8eb"}, {"kind": "Video", "id": "x8bf7f48d"}, {"kind": "Video", "id": "xac110fe5"}, {"kind": "Video", "id": "x3f05b799"}, {"kind": "Video", "id": "xac856172"}, {"kind": "Video", "id": "x540dee13"}, {"kind": "Video", "id": "x52ea8dfa"}, {"kind": "Video", "id": "x85bd9614"}, {"kind": "Video", "id": "xebe458a9"}, {"kind": "Video", "id": "xc3088eef"}, {"kind": "Video", "id": "x5db90122"}], "children": [{"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/precision-basic/", "id": "hhbWHP44StA", "title": "Writing: Precision \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing precision.", "slug": "precision-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/precision-advanced/", "id": "PJHbPlC2Qfc", "title": "Writing: Precision \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing precision.", "slug": "precision-advanced"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/concision-basic/", "id": "ZZdLl8v2VVY", "title": "Writing: Concision, style, and tone \u2014 Basic example 1", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing concision.", "slug": "concision-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/concision-harder/", "id": "mLOj11nMxDk", "title": "Writing: Concision, style, and tone \u2014 Harder example 1", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing concision.", "slug": "concision-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/style-tone-basic/", "id": "-hQiIxfoPP0", "title": "Writing: Concision, style, and tone \u2014 Basic example 2", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing style and tone.", "slug": "style-tone-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/style-tone-harder/", "id": "drUJH-qN-as", "title": "Writing: Concision, style, and tone \u2014 Harder example 2", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing style and tone.", "slug": "style-tone-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/syntax-basic/", "id": "x3nTl9-xf58", "title": "Writing: Syntax \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing syntax.", "slug": "syntax-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/sentence-boundries-harder/", "id": "fpt4WW3EUxY", "title": "Writing: Sentence boundaries \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing sentence boundaries.", "slug": "sentence-boundries-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/subordination-coordination-basic/", "id": "Wv-yAXU_azM", "title": "Writing: Subordination and coordination \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing subordination and coordination.", "slug": "subordination-coordination-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/subordination-coordination-harder/", "id": "ERRR8cY7iQ4", "title": "Writing: Subordination and coordination \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing subordination and coordination.", "slug": "subordination-coordination-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/parallel-structure-basic/", "id": "eUQPJB07btE", "title": "Writing: Parallel structure \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing parallel structure.", "slug": "parallel-structure-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/parallel-structure-harder/", "id": "ldqb2Snn-6s", "title": "Writing: Parallel structure \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing parallel structure.", "slug": "parallel-structure-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/modifier-placement-basic/", "id": "smh3WblMpeY", "title": "Writing: Modifier placement \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing modifier placement.", "slug": "modifier-placement-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/modifier-placement-harder/", "id": "1XnYL5xKk2M", "title": "Writing: Modifier placement \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing modifier placement.", "slug": "modifier-placement-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/shift-verb-tense/", "id": "yl02C7dii7s", "title": "Writing: Shift in verb, tense, and mood \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing shifts in verb, tense, and mood.", "slug": "shift-verb-tense"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/shift-tense-mood-harder/", "id": "qKHw6Sc0XHY", "title": "Writing: Shift in verb, tense, and mood \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing shifts in verb, tense, and mood.", "slug": "shift-tense-mood-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/pronoun-number-basic/", "id": "0uGPdsF4ZmE", "title": "Writing: Pronoun person and number \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing pronouns.", "slug": "pronoun-number-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/pronoun-clarity-basic/", "id": "VRNDGeq_hlE", "title": "Writing: Pronoun clarity \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0pronoun clarity.", "slug": "pronoun-clarity-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/pronoun-antecedent-basic/", "id": "FEKVfWuNOYY", "title": "Writing: Pronoun-antecedent agreement \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0pronoun-antecedent agreement.", "slug": "pronoun-antecedent-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/pronoun-antecedent-harder/", "id": "XLuXNYV8s68", "title": "Writing: Pronoun-antecedent agreement \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing\u00a0pronoun-antecedent agreement.", "slug": "pronoun-antecedent-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/possessive-determiners-basic/", "id": "mYUE-gH9IyQ", "title": "Writing: Possessive determiners \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0possessive determiners.", "slug": "possessive-determiners-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/possessive-determiners-harder/", "id": "-zNVjW42cyk", "title": "Writing: Possessive determiners \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing\u00a0possessive determiners.\u200b", "slug": "possessive-determiners-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/subject-verb-agreement-basic/", "id": "CQxPpe17qyw", "title": "Writing: Subject-verb agreement \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0subject-verb agreement.", "slug": "subject-verb-agreement-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/subject-verb-agreement-harder/", "id": "MfWGyjU32Xs", "title": "Writing: Subject-verb agreement \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing\u00a0subject-verb agreement.", "slug": "subject-verb-agreement-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/noun-agreement-basic/", "id": "bPi1aurgNZg", "title": "Writing: Noun agreement \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0noun agreement.", "slug": "noun-agreement-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/noun-agreement-harder/", "id": "QWJprYEoIFE", "title": "Writing: Noun agreement \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing\u00a0noun agreement.", "slug": "noun-agreement-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/freq-confused-words-basic/", "id": "XlipVSubHms", "title": "Writing: Frequently confused words \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0\u200bfrequently confused words.", "slug": "freq-confused-words-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/freq-confused-words-harder/", "id": "KLnlPpVWi8Q", "title": "Writing: Frequently confused words \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing\u00a0frequently confused\u00a0words.", "slug": "freq-confused-words-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/conventional-expression-basic/", "id": "9TXArCzLTuc", "title": "Writing: Conventional expression \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0\u200bfrequently confused\u00a0words.", "slug": "conventional-expression-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/conventional-expression-harder/", "id": "7HBDLYdyJnc", "title": "Writing: Conventional expression \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing conventional expression.", "slug": "conventional-expression-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/logical-comparison-basic/", "id": "WDcqGygKH44", "title": "Writing: Logical comparison \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing logical comparison.", "slug": "logical-comparison-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/end-sentence-punctuation-basic/", "id": "3xpZprWSn_0", "title": "Writing: End-of-sentence punctuation \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0\u200bend-of-sentence punctuation.", "slug": "end-sentence-punctuation-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/within-sentence-punctuation-harder/", "id": "TPa8nt2RrHU", "title": "Writing: Within-sentence punctuation \u2014 Harder example 1", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing within-sentence punctuation.", "slug": "within-sentence-punctuation-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/unnecessary-punctuation-basic/", "id": "Voj0uzomNPQ", "title": "Writing: Within-sentence punctuation \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0within-sentence punctuation.", "slug": "unnecessary-punctuation-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/unnecessary-punctuation/", "id": "GSy4XwV67iM", "title": "Writing: Within-sentence punctuation \u2014 Harder example 2", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0another harder grammar item testing within-sentence punctuation.\u200b", "slug": "unnecessary-punctuation"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/possessives-harder/", "id": "lxSRKg5ytZo", "title": "Writing: Possessive pronouns \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing possessive pronouns.", "slug": "possessives-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/items-series-basic/", "id": "B5wT4_JJMAI", "title": "Writing: Items in a series \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0items in a series.", "slug": "items-series-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/items-series-harder/", "id": "yqoljfiOYKY", "title": "Writing: Items in a series \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing\u00a0items in a series.\u200b", "slug": "items-series-harder"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/nonrestrictive-parenthetical-basic/", "id": "yRmpV35y5HY", "title": "Writing: Nonrestrictive and parenthetical elements \u2014 Basic example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a basic grammar item testing\u00a0nonrestrictive and parenthetical elements.", "slug": "nonrestrictive-parenthetical-basic"}, {"path": "khan/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar/nonrestrictive-parethetical-elements-harder/", "id": "YqsATg2r4MI", "title": "Writing: Nonrestrictive and parenthetical elements \u2014 Harder example", "kind": "Video", "description": "Watch Sal work\u00a0through\u00a0a harder grammar item testing nonrestrictive and parenthetical elements.", "slug": "nonrestrictive-parethetical-elements-harder"}], "in_knowledge_map": false, "description": "", "node_slug": "new-sat-writing-grammar", "render_type": "Tutorial", "topic_page_url": "/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar", "extended_slug": "test-prep/new-sat/new-sat-reading-writing/new-sat-writing-grammar", "kind": "Topic", "slug": "new-sat-writing-grammar"}], "in_knowledge_map": false, "description": "Worked examples covering the different kinds of Reading and Writing passages found on the new SAT.", "node_slug": "new-sat-reading-writing", "render_type": "Topic", "topic_page_url": "/test-prep/new-sat/new-sat-reading-writing", "extended_slug": "test-prep/new-sat/new-sat-reading-writing", "kind": "Topic", "slug": "new-sat-reading-writing"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/new-sat/new-sat-math/", "id": "new-sat-math", "hide": false, "title": "Math", "child_data": [{"kind": "Topic", "id": "x72e6b4f7"}, {"kind": "Topic", "id": "xfdfcd8eb"}, {"kind": "Topic", "id": "x4edb0ef8"}, {"kind": "Topic", "id": "x15cdfd75"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/", "id": "new-sat-heart-of-algebra", "hide": false, "title": "Heart of algebra", "child_data": [{"kind": "Video", "id": "x92ffef9d"}, {"kind": "Video", "id": "x1537f467"}, {"kind": "Video", "id": "x8da7375c"}, {"kind": "Video", "id": "x5b3ce9fe"}, {"kind": "Video", "id": "xe9d43297"}, {"kind": "Video", "id": "x451b91ba"}, {"kind": "Video", "id": "x627062b3"}, {"kind": "Video", "id": "x4dbd6ae4"}, {"kind": "Video", "id": "xa13768ad"}, {"kind": "Video", "id": "xf752f9f7"}, {"kind": "Video", "id": "x19f1f73a"}, {"kind": "Video", "id": "xdbb208bd"}, {"kind": "Video", "id": "x21285852"}, {"kind": "Video", "id": "x7e73dc7c"}, {"kind": "Video", "id": "x4a57dfb1"}, {"kind": "Video", "id": "x1f0116d1"}], "children": [{"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h6-easier/", "id": "EkBUTZe_SiM", "title": "Solving linear equations and linear inequalities \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Solving linear equations problem.", "slug": "sat-math-h6-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h6-harder/", "id": "WcpvoJAT_as", "title": "Solving linear equations and linear inequalities \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Solving linear equations problem.", "slug": "sat-math-h6-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h8-easier/", "id": "J6-w7njIpgA", "title": "Interpreting linear functions \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Interpreting linear functions problem.", "slug": "sat-math-h8-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h8-harder/", "id": "AqzpkyiL4s4", "title": "Interpreting linear functions \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Interpreting linear functions problem.", "slug": "sat-math-h8-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-linear-equation-easier/", "id": "DhqHyHhibJw", "title": "Linear equation word problems \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Linear equations word problem.", "slug": "sat-linear-equation-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h2-easier/", "id": "VTcPBF9dtKc", "title": "Linear inequality word problems \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Linear inequality word problem.", "slug": "sat-math-h2-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h2-harder/", "id": "XexVwvfOkrQ", "title": "Linear inequality word problems \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Linear inequality word problem.", "slug": "sat-math-h2-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h9-easier/", "id": "DataCxJ5qcM", "title": "Graphing linear equations \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Graphing linear equations problem.", "slug": "sat-math-h9-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h9-harder/", "id": "CAnqu40RSbs", "title": "Graphing linear equations \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Graphing linear equations problem.", "slug": "sat-math-h9-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h3-easier/", "id": "Tk2bxgNI8LY", "title": "Linear function word problems \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Linear functions word problem.", "slug": "sat-math-h3-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h3-harder/", "id": "rLIM8iRmsOI", "title": "Linear function word problems \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Linear functions word problem.", "slug": "sat-math-h3-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h4-easier/", "id": "FjRyBJME0Qw", "title": "Systems of linear inequalities word problems \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Systems of linear inequalities word problem.", "slug": "sat-math-h4-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h4-harder/", "id": "l4265qSL914", "title": "Systems of linear inequalities word problems \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Systems of linear inequalities word problem.", "slug": "sat-math-h4-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h7-easier/", "id": "1q3axPjwLrE", "title": "Solving systems of linear equations \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Solving systems of linear equations problem.", "slug": "sat-math-h7-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h7-harder/", "id": "stYBg9zqgLs", "title": "Solving systems of linear equations \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Solving systems of linear equations problem.", "slug": "sat-math-h7-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/sat-math-h5-harder/", "id": "M_1WJIzLb8k", "title": "Systems of linear equations word problems \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Systems of linear equations word problem.", "slug": "sat-math-h5-harder"}], "in_knowledge_map": false, "description": "", "node_slug": "new-sat-heart-of-algebra", "render_type": "Tutorial", "topic_page_url": "/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra", "extended_slug": "test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra", "kind": "Topic", "slug": "new-sat-heart-of-algebra"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/", "id": "new-sat-passport-advanced-mathematics", "hide": false, "title": "Passport to advanced mathematics", "child_data": [{"kind": "Video", "id": "x9627369a"}, {"kind": "Video", "id": "x9af77085"}, {"kind": "Video", "id": "x2708bc6f"}, {"kind": "Video", "id": "x61986f03"}, {"kind": "Video", "id": "x6aab1e94"}, {"kind": "Video", "id": "x71abfb0a"}, {"kind": "Video", "id": "x6e95db81"}, {"kind": "Video", "id": "x1ae44b13"}, {"kind": "Video", "id": "x01e0086a"}, {"kind": "Video", "id": "xc763c844"}, {"kind": "Video", "id": "xc56818c3"}, {"kind": "Video", "id": "xcf6bf674"}, {"kind": "Video", "id": "x16aba6c7"}, {"kind": "Video", "id": "xced9bb1d"}, {"kind": "Video", "id": "x57c34dd1"}, {"kind": "Video", "id": "x646394c2"}, {"kind": "Video", "id": "x68aa94e8"}, {"kind": "Video", "id": "xb7a143e4"}, {"kind": "Video", "id": "xafb4eff8"}, {"kind": "Video", "id": "xacba2d5e"}, {"kind": "Video", "id": "xb049a70f"}, {"kind": "Video", "id": "x0c79f02f"}, {"kind": "Video", "id": "x85027200"}, {"kind": "Video", "id": "xe782919d"}, {"kind": "Video", "id": "xe83911ac"}, {"kind": "Video", "id": "x5fcd9172"}, {"kind": "Video", "id": "x25eaeca5"}, {"kind": "Video", "id": "x7f75a9f4"}], "children": [{"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p5-easier/", "id": "a_0Sav-Ue90", "title": "Solving quadratic equations \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Solving quadratic equations problem.", "slug": "sat-math-p5-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p5-harder/", "id": "w9TmwjUZA6Q", "title": "Solving quadratic equations \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Solving quadratic equations problem.", "slug": "sat-math-p5-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p10-easier/", "id": "ajZzavtog9I", "title": "Interpreting nonlinear expressions \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Interpreting nonlinear expressions problem.", "slug": "sat-math-p10-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p10-harder/", "id": "ST-KdV7aVrE", "title": "Interpreting nonlinear expressions \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Interpreting nonlinear expressions problem.", "slug": "sat-math-p10-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p1-easier/", "id": "LqNogu68JQQ", "title": "Quadratic and exponential word problems \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Quadratic and exponential word problem.", "slug": "sat-math-p1-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p1-harder/", "id": "sg7drNK_vZ0", "title": "Quadratic and exponential word problems \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Quadratic and exponential word problem.", "slug": "sat-math-p1-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p2-easier/", "id": "nGjXhxjnlDQ", "title": "Manipulating quadratic and exponential expressions \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Manipulating quadratic and exponential expressions problem.", "slug": "sat-math-p2-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p2-harder/", "id": "vJdqX2EQML4", "title": "Manipulating quadratic and exponential expressions \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Manipulating quadratic and exponential expressions problem.", "slug": "sat-math-p2-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p3-easier/", "id": "DDkn5AMXoAU", "title": "Radicals and rational exponents \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Radicals and rational exponents problem.", "slug": "sat-math-p3-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p3-harder/", "id": "bhSnU9zmai4", "title": "Radicals and rational exponents \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Radicals and rational exponents problem.", "slug": "sat-math-p3-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p7-easier/", "id": "utmUAjvl4kc", "title": "Radical and rational equations \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Radical and rational equations problem.", "slug": "sat-math-p7-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p7-harder/", "id": "DXpZth7iBaQ", "title": "Radical and rational equations \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Radical and rational equations problem.", "slug": "sat-math-p7-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p9-easier/", "id": "9-PYxR59H_g", "title": "Operations with rational expressions \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Operations with rational expressions problem.", "slug": "sat-math-p9-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p9-harder/", "id": "heYyUTL5jiM", "title": "Operations with rational expressions \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Operations with rational expressions problem.", "slug": "sat-math-p9-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p6-easier/", "id": "7SnmUoVhYqw", "title": "Operations with polynomials \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Operations with polynomials problem.", "slug": "sat-math-p6-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p6-harder/", "id": "a1EbpU4oQCg", "title": "Operations with polynomials \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Operations with polynomials problem.", "slug": "sat-math-p6-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p11-easier/", "id": "cdMF0cyuWfw", "title": "Polynomial factors and graphs \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Polynomial factors and graphs problem.", "slug": "sat-math-p11-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p11-harder/", "id": "fdGNOb3T2_8", "title": "Polynomial factors and graphs \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Polynomial factors and graphs problem.", "slug": "sat-math-p11-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p12-easier/", "id": "SZ6WuRkummY", "title": "Nonlinear equation graphs \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Nonlinear equation graphs problem.", "slug": "sat-math-p12-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p12-harder/", "id": "VouATo5Cg04", "title": "Nonlinear equation graphs \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Nonlinear equation graphs problem.", "slug": "sat-math-p12-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p8-easier/", "id": "68MakfeY8z8", "title": "Linear and quadratic systems \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Linear and quadratic systems problem.", "slug": "sat-math-p8-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p8-harder/", "id": "-B-i-g6cjic", "title": "Linear and quadratic systems \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Linear and quadratic systems problem.", "slug": "sat-math-p8-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p4-easier/", "id": "b_dDoAbqp1M", "title": "Structure in expressions \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Structure in expressions problem.", "slug": "sat-math-p4-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p4-harder/", "id": "Qd2wJCrFsT8", "title": "Structure in expressions \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Structure in expressions problem.", "slug": "sat-math-p4-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p14-easier/", "id": "MpZEjEO_Sbg", "title": "Isolating quantities \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Isolating quantities problem.", "slug": "sat-math-p14-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p14-harder/", "id": "5WEX0J8hEHM", "title": "Isolating quantities \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Isolating quantities problem.", "slug": "sat-math-p14-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p13-easier/", "id": "RXKr2fOYfLM", "title": "Function notation \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Function notation problem.", "slug": "sat-math-p13-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/sat-math-p13-harder/", "id": "kZZGwa7ITt0", "title": "Function notation \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Function notation problem.", "slug": "sat-math-p13-harder"}], "in_knowledge_map": false, "description": "", "node_slug": "new-sat-passport-advanced-mathematics", "render_type": "Tutorial", "topic_page_url": "/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics", "extended_slug": "test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics", "kind": "Topic", "slug": "new-sat-passport-advanced-mathematics"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/", "id": "new-sat-problem-solving-data-analysis", "hide": false, "title": "Problem solving and data analysis", "child_data": [{"kind": "Video", "id": "x1442a903"}, {"kind": "Video", "id": "x10b43faf"}, {"kind": "Video", "id": "xc3471e0a"}, {"kind": "Video", "id": "xe66330bd"}, {"kind": "Video", "id": "xb5302cda"}, {"kind": "Video", "id": "xacf1ac6d"}, {"kind": "Video", "id": "x3a05c9cb"}, {"kind": "Video", "id": "xb2e70c3b"}, {"kind": "Video", "id": "x47e4e40b"}, {"kind": "Video", "id": "x01f90117"}, {"kind": "Video", "id": "x78fb7975"}, {"kind": "Video", "id": "x16c42951"}, {"kind": "Video", "id": "x4d1c89d9"}, {"kind": "Video", "id": "x73174aef"}, {"kind": "Video", "id": "x522bd183"}, {"kind": "Video", "id": "x4af54852"}, {"kind": "Video", "id": "xc3df4bc8"}, {"kind": "Video", "id": "xf00f38fa"}, {"kind": "Video", "id": "xefbe4194"}], "children": [{"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q1-easier/", "id": "bXxkxJnqt3s", "title": "Ratios, rates, and proportions \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Ratios, rates, and proportions problem.", "slug": "sat-math-q1-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q1-harder/", "id": "skAptImhx1Y", "title": "Ratios, rates, and proportions \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Ratios, rates, and proportions problem.", "slug": "sat-math-q1-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q2-easier/", "id": "aZl9csOSvQU", "title": "Percents \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Percents problem.", "slug": "sat-math-q2-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q2-harder/", "id": "TpQln9_i5t4", "title": "Percents \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Percents problem.", "slug": "sat-math-q2-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q3-easier/", "id": "f_yKNFyUZMs", "title": "Units \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Units problem.", "slug": "sat-math-q3-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q3-harder/", "id": "p34OOHjoyH4", "title": "Units \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Units problem.", "slug": "sat-math-q3-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q7-easier/", "id": "GAaQ9O-NCoc", "title": "Table data \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Table data problem.", "slug": "sat-math-q7-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q7-harder/", "id": "2CrXoLt74iI", "title": "Table data \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Table data problem.", "slug": "sat-math-q7-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q4-easier/", "id": "5JuDBwB28_w", "title": "Scatterplots \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Scatterplots problem.", "slug": "sat-math-q4-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q4-harder/", "id": "cbZEsg56mdo", "title": "Scatterplots \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Scatterplots problem.", "slug": "sat-math-q4-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q5-easier/", "id": "w3NwqsQuWZE", "title": "Key features of graphs \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Key features of graphs problem.", "slug": "sat-math-q5-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q6-easier/", "id": "wbO4sKeyXYI", "title": "Linear and exponential growth \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Linear and exponential growth problem.", "slug": "sat-math-q6-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q6-harder/", "id": "mduivIHoS7Q", "title": "Linear and exponential growth \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Linear and exponential growth problem.", "slug": "sat-math-q6-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q8-easier/", "id": "2-yaOVXG6rQ", "title": "Data inferences \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Data inferences problem.", "slug": "sat-math-q8-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q8-harder/", "id": "Dg9zqpBUcZ4", "title": "Data inferences \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Data inferences problem.", "slug": "sat-math-q8-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q9-easier/", "id": "sz4DpNzB5Wo", "title": "Center, spread, and shape of distributions \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Center, spread, and shape of distributions problem.", "slug": "sat-math-q9-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q9-harder/", "id": "Z_Cjg3Gla_0", "title": "Center, spread, and shape of distributions \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Center, spread, and shape of distributions problem.", "slug": "sat-math-q9-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q10-easier/", "id": "BqXS0liFvDc", "title": "Data collection and conclusions \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Data collections and conclusions problem.", "slug": "sat-math-q10-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/sat-math-q10-harder/", "id": "ocINfFUHQT0", "title": "Data collection and conclusions \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Data collections and conclusions problem.", "slug": "sat-math-q10-harder"}], "in_knowledge_map": false, "description": "", "node_slug": "new-sat-problem-solving-data-analysis", "render_type": "Tutorial", "topic_page_url": "/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis", "extended_slug": "test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis", "kind": "Topic", "slug": "new-sat-problem-solving-data-analysis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/", "id": "new-sat-additional-topics-math", "hide": false, "title": "Additional topics in math", "child_data": [{"kind": "Video", "id": "xda8ac971"}, {"kind": "Video", "id": "xfbe55501"}, {"kind": "Video", "id": "xb259c239"}, {"kind": "Video", "id": "x960b1e80"}, {"kind": "Video", "id": "x8e8c18af"}, {"kind": "Video", "id": "x1adedf5e"}, {"kind": "Video", "id": "x683a5e9b"}, {"kind": "Video", "id": "x9bfafa26"}, {"kind": "Video", "id": "x7f274931"}, {"kind": "Video", "id": "x46d7398f"}, {"kind": "Video", "id": "x4d90a9bc"}, {"kind": "Video", "id": "x0036ce50"}, {"kind": "Video", "id": "x1af6f265"}, {"kind": "Video", "id": "x88fea2fc"}, {"kind": "Video", "id": "x75ec98fb"}, {"kind": "Video", "id": "x7583dbca"}], "children": [{"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s1-easier/", "id": "Vb_XE2mtE1Y", "title": "Volume word problems \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Volume word problem.", "slug": "sat-math-s1-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s1-harder/", "id": "sy3_PGIuiXs", "title": "Volume word problems \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Volume word problem.", "slug": "sat-math-s1-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s2-easier/", "id": "14kScZR2iI4", "title": "Right triangle word problems \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Right triangle word problem.", "slug": "sat-math-s2-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s2-harder/", "id": "RTAHBQ6fuHA", "title": "Right triangle word problems \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Right triangle word problem.", "slug": "sat-math-s2-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s6-easier/", "id": "rgvwd6iFni0", "title": "Congruence and similarity \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Congruence and similarity problem.", "slug": "sat-math-s6-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s6-harder/", "id": "zIfQFH79Kkg", "title": "Congruence and similarity \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Congruence and similarity problem.", "slug": "sat-math-s6-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s7-easier/", "id": "WOU_jV8d5VU", "title": "Right triangle geometry \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Right triangle geometry problem.", "slug": "sat-math-s7-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s7-harder/", "id": "hJrJJQ6myYA", "title": "Right triangle geometry \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Right triangle geometry problem.", "slug": "sat-math-s7-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s4-easier/", "id": "7CXN56zbqBM", "title": "Angles, arc lengths, and trig functions \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Angles, arc lengths, and trig functions problem.", "slug": "sat-math-s4-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s4-harder/", "id": "1irO3YeZcU4", "title": "Angles, arc lengths, and trig functions \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Angles, arc lengths, and trig functions problem.", "slug": "sat-math-s4-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s5-easier/", "id": "UgWxvqIZLU4", "title": "Circle theorems \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Circle theorems problem.", "slug": "sat-math-s5-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s5-harder/", "id": "6fQipZcvNFg", "title": "Circle theorems \u2014 Harder example", "kind": "Video", "description": "Watch Sal work through a harder Circle theorems problem.", "slug": "sat-math-s5-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s8-easier/", "id": "fwBqEfjCyL8", "title": "Circle equations \u2014 Basic example", "kind": "Video", "description": "Watch Sal work through a basic Circle equations problem.", "slug": "sat-math-s8-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s8-harder/", "id": "Jo94CnblKcA", "title": "Circle equations \u2014 Harder example", "kind": "Video", "description": "\u200bWatch Sal work through a harder Circle equations problem.", "slug": "sat-math-s8-harder"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s3-easier/", "id": "JEZaUvH2Eq8", "title": "Complex numbers \u2014 Basic example", "kind": "Video", "description": "\u200bWatch Sal work through a basic Complex numbers problem.", "slug": "sat-math-s3-easier"}, {"path": "khan/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/sat-math-s3-harder/", "id": "CIRZaJ4Vboo", "title": "Complex numbers \u2014 Harder example", "kind": "Video", "description": "\u200bWatch Sal work through a harder Complex numbers problem.", "slug": "sat-math-s3-harder"}], "in_knowledge_map": false, "description": "", "node_slug": "new-sat-additional-topics-math", "render_type": "Tutorial", "topic_page_url": "/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math", "extended_slug": "test-prep/new-sat/new-sat-math/new-sat-additional-topics-math", "kind": "Topic", "slug": "new-sat-additional-topics-math"}], "in_knowledge_map": false, "description": "Worked examples covering all of the different Math skills on the new SAT.", "node_slug": "new-sat-math", "render_type": "Topic", "topic_page_url": "/test-prep/new-sat/new-sat-math", "extended_slug": "test-prep/new-sat/new-sat-math", "kind": "Topic", "slug": "new-sat-math"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/new-sat/new-sat-tips-planning/", "id": "new-sat-tips-planning", "hide": false, "title": "Tips & Planning", "child_data": [{"kind": "Topic", "id": "xef54d59a"}, {"kind": "Topic", "id": "x6e4295a2"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/", "id": "new-sat-about-sat", "hide": false, "title": "About the SAT", "child_data": [{"kind": "Video", "id": "x8f184a4a"}, {"kind": "Video", "id": "x5eae70f9"}, {"kind": "Video", "id": "x79aa9a15"}, {"kind": "Video", "id": "x105dfec9"}, {"kind": "Video", "id": "x3c14b24a"}, {"kind": "Video", "id": "x4b68296e"}, {"kind": "Article", "id": "x3876dced"}, {"kind": "Article", "id": "x61624f79"}], "children": [{"path": "khan/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/walk-through-sat-practice-platform/", "id": "QvLS9pP65sA", "title": "Overview of the Official SAT Practice", "kind": "Video", "description": "Sal walks through using Official SAT Practice on KhanAcademy.org, which we built in partnership with College Board (the creators of the SAT).", "slug": "walk-through-sat-practice-platform"}, {"path": "khan/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/sat-overview-of-new-sat/", "id": "qYD5iwhLzm8", "title": "Format changes to the new SAT", "kind": "Video", "description": "In March 2016, the SAT is switching to a new format. Sal covers how the exam is changing.", "slug": "sat-overview-of-new-sat"}, {"path": "khan/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/sat-differences-of-new-sat/", "id": "rxJRhbS_21c", "title": "Content changes to the new SAT", "kind": "Video", "description": "Sal covers the major content changes to the new SAT.", "slug": "sat-differences-of-new-sat"}, {"path": "khan/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/sat-math-test-intro/", "id": "sqG9r4rSwFA", "title": "Introduction to the SAT Math test", "kind": "Video", "slug": "sat-math-test-intro"}, {"path": "khan/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/sat-reading-test-intro/", "id": "pB9HZsAFXpw", "title": "Introduction to the SAT Reading test", "kind": "Video", "slug": "sat-reading-test-intro"}, {"path": "khan/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/sat-writing-test-intro/", "id": "V-_H-6bXw8E", "title": "Introduction to the SAT Writing & Language test", "kind": "Video", "slug": "sat-writing-test-intro"}], "in_knowledge_map": false, "description": "", "node_slug": "new-sat-about-sat", "render_type": "Tutorial", "topic_page_url": "/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat", "extended_slug": "test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat", "kind": "Topic", "slug": "new-sat-about-sat"}], "in_knowledge_map": false, "description": "Learn about the new SAT and get tips for preparing for the test.", "node_slug": "new-sat-tips-planning", "render_type": "Topic", "topic_page_url": "/test-prep/new-sat/new-sat-tips-planning", "extended_slug": "test-prep/new-sat/new-sat-tips-planning", "kind": "Topic", "slug": "new-sat-tips-planning"}], "in_knowledge_map": false, "description": "Practice all of the skills you\u2019ll need for the new SAT. We also have four official practice exams from College Board. The October 2015 PSAT is in the style of the new SAT.", "node_slug": "new-sat", "render_type": "Subject", "topic_page_url": "/test-prep/new-sat", "extended_slug": "test-prep/new-sat", "kind": "Topic", "slug": "new-sat"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/", "id": "mcat", "hide": false, "title": "MCAT", "child_data": [{"kind": "Topic", "id": "x64cd6a63"}, {"kind": "Topic", "id": "x5e1059d5"}, {"kind": "Topic", "id": "x6ceb02de"}, {"kind": "Topic", "id": "xe32cf3b7"}, {"kind": "Topic", "id": "xf75fcd0c"}, {"kind": "Topic", "id": "xed868407"}, {"kind": "Topic", "id": "xffad9795"}, {"kind": "Topic", "id": "xab69e2b0"}, {"kind": "Topic", "id": "xa7e68c2d"}, {"kind": "Topic", "id": "x0054fc82"}, {"kind": "Topic", "id": "x0ec6ab0d"}, {"kind": "Topic", "id": "x6a06eaee"}, {"kind": "Topic", "id": "x967db583"}, {"kind": "Topic", "id": "xfee83fcc"}, {"kind": "Topic", "id": "xcf805794"}], "children": [{"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/", "id": "critical-analysis-and-reasoning-skills-practice-questions", "hide": false, "title": "Critical analysis and reasoning skills practice questions", "child_data": [{"kind": "Topic", "id": "x7d667b5a"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/", "id": "critical-analysis-and-reasoning-skills-tutorial", "hide": false, "title": "Critical analysis and reasoning skills (CARS) practice questions", "child_data": [{"kind": "Exercise", "id": "xf32b9b40"}, {"kind": "Exercise", "id": "x7b580ec1"}, {"kind": "Exercise", "id": "xc45b8c7e"}, {"kind": "Exercise", "id": "xc10f3e0b"}, {"kind": "Exercise", "id": "x423fc017"}, {"kind": "Exercise", "id": "x1fd6b189"}, {"kind": "Exercise", "id": "xb291dc9d"}, {"kind": "Exercise", "id": "xefffbc24"}, {"kind": "Exercise", "id": "x2e74fbe5"}, {"kind": "Exercise", "id": "xd3176437"}, {"kind": "Exercise", "id": "xaf6ecc60"}], "children": [{"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/the-ultimatum-game/", "id": "the-ultimatum-game", "title": "The ultimatum game", "description": "The ultimatum game", "slug": "the-ultimatum-game", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/living-in-a-rational-society/", "id": "living-in-a-rational-society", "title": "Living in a rational society", "description": "Living in a rational society", "slug": "living-in-a-rational-society", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/deconstructionism-and-literature/", "id": "deconstructionism-and-literature", "title": "Deconstructionism and literature", "description": "Deconstructionism and literature", "slug": "deconstructionism-and-literature", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/tools-for-thought/", "id": "tools-for-thought", "title": "Tools for thought", "description": "Tools for thought", "slug": "tools-for-thought", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/does-free-will-exist-/", "id": "does-free-will-exist-", "title": "Does free will exist?", "description": "Does free will exist?", "slug": "does-free-will-exist-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/the-honest-truth-about-dishonesty-/", "id": "the-honest-truth-about-dishonesty-", "title": "The honest truth about dishonesty", "description": "The honest truth about dishonesty", "slug": "the-honest-truth-about-dishonesty-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/the-happy-american/", "id": "the-happy-american", "title": "The happy american", "description": "The happy american", "slug": "the-happy-american", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/designing-courthouses/", "id": "designing-courthouses", "title": "Designing courthouses", "description": "Designing courthouses", "slug": "designing-courthouses", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/seeing-color-through-homer-s-eyes/", "id": "seeing-color-through-homer-s-eyes", "title": "Seeing color through homer's eyes", "description": "Seeing color through homer's eyes", "slug": "seeing-color-through-homer-s-eyes", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/physical-education-in-the-uk/", "id": "physical-education-in-the-uk", "title": "Physical education in the UK", "description": "Physical education in the UK", "slug": "physical-education-in-the-uk", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial/censorship-an-unnecessary-evil/", "id": "censorship--an-unnecessary-evil", "title": "Censorship: An unnecessary evil", "description": "Censorship: An unnecessary evil", "slug": "censorship-an-unnecessary-evil", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Go ahead and practice some passage-based questions!", "node_slug": "critical-analysis-and-reasoning-skills-tutorial", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial", "extended_slug": "test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions/critical-analysis-and-reasoning-skills-tutorial", "kind": "Topic", "slug": "critical-analysis-and-reasoning-skills-tutorial"}], "in_knowledge_map": false, "description": "", "node_slug": "critical-analysis-and-reasoning-skills-practice-questions", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions", "extended_slug": "test-prep/mcat/critical-analysis-and-reasoning-skills-practice-questions", "kind": "Topic", "slug": "critical-analysis-and-reasoning-skills-practice-questions"}, {"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/test-prep/mcat/biological-sciences-practice/", "id": "biological-sciences-practice", "hide": false, "title": "Biological and Biochemical Foundations of Living Systems Passages", "child_data": [{"kind": "Topic", "id": "x2e37a410"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/", "id": "biological-sciences-practice-tut", "hide": false, "title": "Biological sciences practice passage questions", "child_data": [{"kind": "Exercise", "id": "x8d6fb7b4"}, {"kind": "Exercise", "id": "xb60ceff5"}, {"kind": "Exercise", "id": "x5eaad034"}, {"kind": "Exercise", "id": "xb78506dd"}, {"kind": "Exercise", "id": "x4352bec9"}, {"kind": "Exercise", "id": "xcf2ffc66"}, {"kind": "Exercise", "id": "xa3f607eb"}, {"kind": "Exercise", "id": "xdcee764a"}, {"kind": "Exercise", "id": "xc8bb2f39"}, {"kind": "Exercise", "id": "xa9ce15e1"}, {"kind": "Exercise", "id": "x4d60ad0d"}, {"kind": "Exercise", "id": "xce0bab4f"}, {"kind": "Exercise", "id": "xc5fb72d9"}, {"kind": "Exercise", "id": "xe9de394e"}, {"kind": "Exercise", "id": "xdb29d531"}, {"kind": "Exercise", "id": "xfef9c8be"}, {"kind": "Exercise", "id": "x4a080f50"}, {"kind": "Exercise", "id": "x8e1acc60"}, {"kind": "Exercise", "id": "x4fee30e6"}, {"kind": "Exercise", "id": "xd36f507e"}, {"kind": "Exercise", "id": "xbe6ea293"}, {"kind": "Exercise", "id": "xa461b2aa"}, {"kind": "Exercise", "id": "x27b83c79"}, {"kind": "Exercise", "id": "x35ca5fd1"}, {"kind": "Exercise", "id": "xf25b566c"}, {"kind": "Exercise", "id": "x0d48a02a"}, {"kind": "Exercise", "id": "x29a74f59"}, {"kind": "Exercise", "id": "x12e78879"}, {"kind": "Exercise", "id": "x7c64441f"}, {"kind": "Exercise", "id": "xc0cc615b"}, {"kind": "Exercise", "id": "x0cb8c5ff"}, {"kind": "Exercise", "id": "x749f587e"}, {"kind": "Exercise", "id": "x8adb1321"}, {"kind": "Exercise", "id": "x663b7dd1"}, {"kind": "Exercise", "id": "xfcfe93e7"}, {"kind": "Exercise", "id": "xdd675af8"}, {"kind": "Exercise", "id": "x18d914c9"}, {"kind": "Exercise", "id": "x1139cd9e"}, {"kind": "Exercise", "id": "xebbb8fb3"}, {"kind": "Exercise", "id": "x1c2e1e82"}, {"kind": "Exercise", "id": "x90d03904"}, {"kind": "Exercise", "id": "x9673a924"}, {"kind": "Exercise", "id": "xef0d7aa2"}, {"kind": "Exercise", "id": "x82d9ce18"}, {"kind": "Exercise", "id": "xca0b7d9a"}, {"kind": "Exercise", "id": "xc3386e6c"}, {"kind": "Exercise", "id": "x8da38de8"}, {"kind": "Exercise", "id": "x33e67b34"}, {"kind": "Exercise", "id": "x232aadf8"}, {"kind": "Exercise", "id": "xef4d0c4b"}, {"kind": "Exercise", "id": "x7fe5411e"}, {"kind": "Exercise", "id": "x39e0adeb"}, {"kind": "Exercise", "id": "xa4ffcac0"}, {"kind": "Exercise", "id": "x9d6ba4f4"}, {"kind": "Exercise", "id": "x2ec857d8"}, {"kind": "Exercise", "id": "x936b5994"}, {"kind": "Exercise", "id": "xe66e4dcd"}, {"kind": "Exercise", "id": "x172318ef"}, {"kind": "Exercise", "id": "x786439c9"}, {"kind": "Exercise", "id": "xda30f9f4"}, {"kind": "Exercise", "id": "x239e8e86"}, {"kind": "Exercise", "id": "xb534afce"}, {"kind": "Exercise", "id": "x0f1b8d6b"}, {"kind": "Exercise", "id": "x762f99f4"}, {"kind": "Exercise", "id": "xc96a87da"}, {"kind": "Exercise", "id": "x76beb655"}, {"kind": "Exercise", "id": "xb0ea79a7"}, {"kind": "Exercise", "id": "xe65901f3"}, {"kind": "Exercise", "id": "x700e6c3b"}, {"kind": "Exercise", "id": "x7e3f8563"}, {"kind": "Exercise", "id": "x67f8b5f4"}, {"kind": "Exercise", "id": "x8c626394"}, {"kind": "Exercise", "id": "x73a77b50"}, {"kind": "Exercise", "id": "xecf15f12"}, {"kind": "Exercise", "id": "x2d8abe48"}, {"kind": "Exercise", "id": "xe1cb5041"}, {"kind": "Exercise", "id": "x25310924"}, {"kind": "Exercise", "id": "xd230995f"}, {"kind": "Exercise", "id": "x06f000da"}, {"kind": "Exercise", "id": "x8c8edfdd"}, {"kind": "Exercise", "id": "x5c713e78"}, {"kind": "Exercise", "id": "xbe8083f4"}, {"kind": "Exercise", "id": "x2bb76f99"}, {"kind": "Exercise", "id": "x8cb16074"}, {"kind": "Exercise", "id": "x6efbe7c1"}, {"kind": "Exercise", "id": "x6d22ca5f"}, {"kind": "Exercise", "id": "x798e4d96"}, {"kind": "Exercise", "id": "x41f54761"}, {"kind": "Exercise", "id": "x0b427e60"}, {"kind": "Exercise", "id": "x268a34e4"}, {"kind": "Exercise", "id": "x43a83e44"}, {"kind": "Exercise", "id": "x4ca96b53"}, {"kind": "Exercise", "id": "x0970fb0a"}, {"kind": "Exercise", "id": "x15d4e1f5"}, {"kind": "Exercise", "id": "x088ffade"}, {"kind": "Exercise", "id": "x3f72269e"}, {"kind": "Exercise", "id": "x852a29f2"}, {"kind": "Exercise", "id": "x91ea978d"}, {"kind": "Exercise", "id": "xd891dbb4"}, {"kind": "Exercise", "id": "x4d9bcc20"}, {"kind": "Exercise", "id": "x869ea153"}, {"kind": "Exercise", "id": "x574c0c67"}, {"kind": "Exercise", "id": "xf3bd5298"}, {"kind": "Exercise", "id": "x0bffb532"}, {"kind": "Exercise", "id": "x39efd055"}, {"kind": "Exercise", "id": "x3332b61f"}, {"kind": "Exercise", "id": "x232c0301"}, {"kind": "Exercise", "id": "x3c431dc6"}, {"kind": "Exercise", "id": "x0f4b88db"}, {"kind": "Exercise", "id": "x16ce6cc6"}, {"kind": "Exercise", "id": "xfa90b6df"}, {"kind": "Exercise", "id": "x9ca2ca68"}, {"kind": "Exercise", "id": "x6031d7a9"}, {"kind": "Exercise", "id": "xcb84f5f3"}, {"kind": "Exercise", "id": "xd2628297"}, {"kind": "Exercise", "id": "xd85974be"}, {"kind": "Exercise", "id": "x2516e640"}, {"kind": "Exercise", "id": "x2901339e"}, {"kind": "Exercise", "id": "x17828392"}, {"kind": "Exercise", "id": "x06e7cb3e"}, {"kind": "Exercise", "id": "x5c9267f9"}, {"kind": "Exercise", "id": "xefa7754c"}, {"kind": "Exercise", "id": "x965a7799"}, {"kind": "Exercise", "id": "xfbf66210"}, {"kind": "Exercise", "id": "x02b09e66"}, {"kind": "Exercise", "id": "xb4dc13ad"}, {"kind": "Exercise", "id": "xaeee17ce"}, {"kind": "Exercise", "id": "xb6e4e631"}, {"kind": "Exercise", "id": "xaeb87708"}, {"kind": "Exercise", "id": "x16220a4c"}, {"kind": "Exercise", "id": "xade5d95b"}, {"kind": "Exercise", "id": "x2f6e957c"}, {"kind": "Exercise", "id": "xe7fe3bf6"}, {"kind": "Exercise", "id": "x43a0f6b4"}, {"kind": "Exercise", "id": "xf8e17858"}, {"kind": "Exercise", "id": "xc4e59af1"}, {"kind": "Exercise", "id": "xd630dd99"}, {"kind": "Exercise", "id": "x97eb521e"}, {"kind": "Exercise", "id": "x0293af46"}, {"kind": "Exercise", "id": "x0397cf1a"}, {"kind": "Exercise", "id": "x8ba1f82d"}, {"kind": "Exercise", "id": "xda9e282a"}], "children": [{"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/mendelian-genetics-passage-2/", "id": "mendelian-genetics---passage-2", "title": "Mendelian inheritance of immunodeficiency disorders", "slug": "mendelian-genetics-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/helicobacter-pylori-and-the-gastrointestinal-system/", "id": "helicobacter-pylori-and-the-gastrointestinal-system", "title": "Helicobacter pylori and the gastrointestinal system", "description": "Questions related to the gastrointestinal system", "slug": "helicobacter-pylori-and-the-gastrointestinal-system", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/amino-acids-and-proteins/", "id": "amino-acids-and-proteins", "title": "Collagen mutations result in Osteogenesis imperfecta", "slug": "amino-acids-and-proteins", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/amino-acids-and-proteins-passage-2/", "id": "amino-acids-and-proteins---passage-2", "title": "Dietary supplements for building up muscles", "slug": "amino-acids-and-proteins-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/enzyme-structure-and-function-passage-1/", "id": "enzyme-structure-and-function---passage-1", "title": "Fighting the flu with Oseltamivir", "slug": "enzyme-structure-and-function-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/ace-inhibitors-and-the-renal-regulation-of-blood-pressure-/", "id": "ace-inhibitors-and-the-renal-regulation-of-blood-pressure-", "title": "ACE inhibitors and the renal regulation of blood pressure", "description": "Questions about kidney physiology", "slug": "ace-inhibitors-and-the-renal-regulation-of-blood-pressure-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-discovery-of-leptin/", "id": "the-discovery-of-leptin", "title": "The discovery of leptin", "description": "Questions related to the structure and function of the endocrine system", "slug": "the-discovery-of-leptin", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/disorders-of-the-skeletal-system-and-bone-remodeling-/", "id": "disorders-of-the-skeletal-system-and-bone-remodeling-", "title": "Disorders of the skeletal system and bone remodeling", "description": "Questions related to the human skeletal system", "slug": "disorders-of-the-skeletal-system-and-bone-remodeling-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-only-known-case-of-an-hiv-cure/", "id": "the-only-known-case-of-an-hiv-cure", "title": "The only known case of an HIV cure", "description": "Questions related to viral life cycle", "slug": "the-only-known-case-of-an-hiv-cure", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/type-2-diabetes-mellitus/", "id": "type-2-diabetes-mellitus", "title": "Type 2 diabetes mellitus", "description": "Questions related to the endocrine system", "slug": "type-2-diabetes-mellitus", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/enzyme-structure-and-function-passage-2/", "id": "enzyme-structure-and-function---passage-2", "title": "Muscles rely on lactate dehydrogenase", "slug": "enzyme-structure-and-function-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-role-of-alcohol-abuse-in-pancreatitis/", "id": "the-role-of-alcohol-abuse-in-pancreatitis", "title": "The role of alcohol abuse in pancreatitis", "description": "Questions related to pancreatitis", "slug": "the-role-of-alcohol-abuse-in-pancreatitis", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/a-genetic-mutation-with-prognostic-value-for-glioblastoma-patients/", "id": "a-genetic-mutation-with-prognostic-value-for-glioblastoma-patients", "title": "A genetic mutation with prognostic value for glioblastoma patients", "description": "Questions related to processes of cell division, differentiation, and specialization.", "slug": "a-genetic-mutation-with-prognostic-value-for-glioblastoma-patients", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/myelogenous-leukemia-and-two-chemotherapeutic-agents/", "id": "myelogenous-leukemia-and-two-chemotherapeutic-agents", "title": "Myelogenous leukemia and two chemotherapeutic agents", "description": "Questions related to genetics and control of enzyme activity", "slug": "myelogenous-leukemia-and-two-chemotherapeutic-agents", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/-biochemistry-of-a-newly-discovered-pretend-neurotransmitter/", "id": "-biochemistry-of-a-newly-discovered--pretend--neurotransmitter", "title": "Biochemistry of a newly discovered (pretend) neurotransmitter", "description": "Questions Related to Controlling Enzyme Activity", "slug": "-biochemistry-of-a-newly-discovered-pretend-neurotransmitter", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/mechanisms-of-antibody-variability-during-b-cell-development/", "id": "mechanisms-of-antibody-variability-during-b-cell-development", "title": "Mechanisms of antibody variability during B-cell development", "description": "Questions related to DNA and the immune system", "slug": "mechanisms-of-antibody-variability-during-b-cell-development", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/reverse-transcriptase-polymerase-chain-reaction-rt-pcr-of-a-uv-dependent-gene/", "id": "reverse-transcriptase-polymerase-chain-reaction--rt-pcr--of-a-uv-dependent-gene", "title": "Reverse transcriptase polymerase chain reaction (RT-PCR) of a UV-dependent gene", "description": "Questions related to recombinant DNA and biotechnology", "slug": "reverse-transcriptase-polymerase-chain-reaction-rt-pcr-of-a-uv-dependent-gene", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/translocations-in-the-germline/", "id": "translocations-in-the-germline", "title": "Translocations in the germline", "description": "Questions related to translocation", "slug": "translocations-in-the-germline", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/a-family-history-of-marfan-syndrome/", "id": "a-family-history-of-marfan-syndrome", "title": "A family history of Marfan syndrome", "description": "Questions related to heredity", "slug": "a-family-history-of-marfan-syndrome", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/blood-oxygen-levels-may-determine-cardiac-muscle-regeneration/", "id": "blood-oxygen-levels-may-determine-cardiac-muscle-regeneration", "title": "Blood oxygen levels may determine cardiac muscle regeneration", "description": "questions on cell cycle of cardia muscle", "slug": "blood-oxygen-levels-may-determine-cardiac-muscle-regeneration", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/cushing-s-syndrome-and-the-hypothalamic-pituitary-axis/", "id": "cushing-s-syndrome-and-the-hypothalamic-pituitary-axis", "title": "Cushing's syndrome and the hypothalamic-pituitary axis", "description": "Questions related to the functions of the endocrine systems and ways in which hormones coordinate the organ systems.", "slug": "cushing-s-syndrome-and-the-hypothalamic-pituitary-axis", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-electrophoretic-separation-of-proteins/", "id": "the-electrophoretic-separation-of-proteins", "title": "The electrophoretic separation of proteins", "slug": "the-electrophoretic-separation-of-proteins", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/virulence-factors-of-listeria-monocytogenes/", "id": "virulence-factors-of-listeria-monocytogenes", "title": "Virulence factors of Listeria monocytogenes", "description": "Questions related to the growth and genetics of bacteria.", "slug": "virulence-factors-of-listeria-monocytogenes", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/enzyme-kinetics-passage-1/", "id": "enzyme-kinetics---passage-1", "title": "Sarin gas and its potent effects on the body", "slug": "enzyme-kinetics-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/enzyme-kinetics-passage-2/", "id": "enzyme-kinetics---passage-2", "title": "The genetic basis of Phenylketonuria", "slug": "enzyme-kinetics-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/dna-passage-1/", "id": "dna---passage-1", "title": "Early experiments on the genetic code", "slug": "dna-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/dna-passage-2/", "id": "dna---passage-2", "title": "Understanding the cause of Duchenne Muscular Dystrophy (DMD)", "slug": "dna-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/gene-control-passage-1/", "id": "gene-control---passage-1", "title": "Gene therapy using retroviruses", "slug": "gene-control-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/gene-control-passage-2/", "id": "gene-control---passage-2", "title": "Regulation of the lac operon", "slug": "gene-control-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/genetic-mutations-passage-1/", "id": "genetic-mutations---passage-1", "title": "Mutations that cause Crohn\u2019s Disease", "description": "Genetic mutations - Passage 1", "slug": "genetic-mutations-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/genetic-mutations-passage-2/", "id": "genetic-mutations---passage-2", "title": "Genetics of Myotonic dystrophy", "description": "Genetic mutations - Passage 2", "slug": "genetic-mutations-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/inheritance-patterns-in-flowering-plants/", "id": "inheritance-patterns-in-flowering-plants", "title": "Inheritance patterns in flowering plants", "description": "Questions related to Mendelian inhertiance", "slug": "inheritance-patterns-in-flowering-plants", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/evolution-and-population-dynamics-passage-1/", "id": "evolution-and-population-dynamics---passage-1", "title": "Selective pressures on cacti needle length", "slug": "evolution-and-population-dynamics-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/evolution-and-population-dynamics-passage-2/", "id": "evolution-and-population-dynamics----passage-2", "title": "Human impact on animal populations", "description": "Evolution and population dynamics - Passage 2", "slug": "evolution-and-population-dynamics-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/principle-s-of-bioenergetics/", "id": "principle-s-of-bioenergetics", "title": "Heat generation in brown fat", "slug": "principle-s-of-bioenergetics", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/principles-of-bioenergetics-passage-2/", "id": "principles-of-bioenergetics---passage-2", "title": "Control of glucose levels", "slug": "principles-of-bioenergetics-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/overview-of-metabolism-passage-1/", "id": "overview-of-metabolism---passage-1", "title": "Regulating electron carrier molecules", "slug": "overview-of-metabolism-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/overview-of-metabolism-passage-2/", "id": "overview-of-metabolism---passage-2", "title": "Studying metabolism with galvanic cells", "slug": "overview-of-metabolism-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/carbohydrates-quiz-passage-1/", "id": "carbohydrates-quiz-passage-1", "title": "The structure of monosaccharides", "description": "Carbohydrates quiz passage 1", "slug": "carbohydrates-quiz-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/carbohydrates-quiz-passage-2/", "id": "carbohydrates-quiz-passage-2", "title": "Hemiacetal formation of carbohydrates", "description": "Carbohydrates quiz passage 2", "slug": "carbohydrates-quiz-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/carbohydrate-metabolism-passage-1/", "id": "carbohydrate-metabolism---passage-1", "title": "Hypoglycemia and carbohydrate metabolism", "slug": "carbohydrate-metabolism-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/carbohydrate-metabolism-passage-2/", "id": "carbohydrate-metabolism---passage-2", "title": "Glucose-6-Phosphate Dehydrogenase deficiency", "slug": "carbohydrate-metabolism-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/krebs-cycle-and-oxidative-phosphorylation-passage-1/", "id": "krebs-cycle-and-oxidative-phosphorylation---passage-1", "title": "Inhibiting the electron transport chain", "slug": "krebs-cycle-and-oxidative-phosphorylation-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/krebs-cycle-and-oxidative-phosphorylation-passage-2/", "id": "krebs-cycle-and-oxidative-phosphorylation---passage-2", "title": "Glucogenic and ketogenic amino acids", "slug": "krebs-cycle-and-oxidative-phosphorylation-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/fat-and-protein-metabolism-passage-1/", "id": "fat-and-protein-metabolism---passage-1", "title": "Diabetes and hyperglycemia", "description": "Fat and Protein Metabolism - Passage 1", "slug": "fat-and-protein-metabolism-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/fat-and-protein-metabolism-passage-2/", "id": "fat-and-protein-metabolism---passage-2", "title": "Fat metabolism deficiences", "description": "Fat and Protein Metabolism - Passage 2", "slug": "fat-and-protein-metabolism-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/cell-membrane-overview-passage-1/", "id": "cell-membrane-overview---passage-1", "title": "Cell membranes and trafficking disorders", "slug": "cell-membrane-overview-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/cell-membrane-overview-passage-2/", "id": "cell-membrane-overview---passage-2", "title": "Ion transport defects cause cystic fibrosis", "slug": "cell-membrane-overview-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/cell-cell-interactions-passage-1/", "id": "cell-cell-interactions---passage-1", "title": "Reducing pain with morphine", "description": "Cell-cell Interactions - Passage 1", "slug": "cell-cell-interactions-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/cell-cell-interactions-passage-2/", "id": "cell-cell-interactions---passage-2", "title": "The role of tyrosine-kinase inhibitors in preventing cancer", "description": "Cell-cell Interactions - Passage 2", "slug": "cell-cell-interactions-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/neural-cells-passage-1/", "id": "neural-cells---passage-1", "title": "Effects of stroke on the brain", "slug": "neural-cells-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/neural-cells-passage-2/", "id": "neural-cells---passage-2", "title": "Multiple sclerosis and viruses", "slug": "neural-cells-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/neuron-membrane-potentials-passage-1/", "id": "neuron-membrane-potentials---passage-1", "title": "Ion channel effects on neuron membrane potentials", "slug": "neuron-membrane-potentials-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/neuron-membrane-potentials-passage-2/", "id": "neuron-membrane-potentials---passage-2", "title": "Demyelinating disease and aging", "slug": "neuron-membrane-potentials-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-synapse-passage-1/", "id": "the-synapse---passage-1", "title": "Neurotransmitter removal from the synapse", "slug": "the-synapse-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-synapse-passage-2/", "id": "the-synapse---passage-2", "title": "Synaptic transmission between neurons", "slug": "the-synapse-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/endocrine-system-passage-1/", "id": "endocrine-system---passage-1", "title": "Regulation of growth hormone", "slug": "endocrine-system-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/endocrine-system-passage-2/", "id": "endocrine-system---passage-2", "title": "Measuring hormone levels", "slug": "endocrine-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/circulatory-system-passage-1/", "id": "circulatory-system---passage-1", "title": "The effects of high blood pressure on the heart", "description": "Circulatory system questions", "slug": "circulatory-system-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/circulatory-system-passage-2/", "id": "circulatory-system---passage-2", "title": "Blood oxygen levels during exercise", "description": "Circulatory system questions", "slug": "circulatory-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/hematologic-system-quiz/", "id": "hematologic-system-quiz", "title": "Symptoms of low platelet counts", "slug": "hematologic-system-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/hematologic-system-passage-2/", "id": "hematologic-system--passage-2", "title": "The oxygen affinity of hemoglobin", "description": "Hematologic System- Passage 2", "slug": "hematologic-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/respiratory-system-passage-1/", "id": "respiratory-system---passage-1", "title": "Inspiration, respiratory rate, and respiratory therapy", "description": "This passage will test your knowledge on the respiratory system", "slug": "respiratory-system-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/respiratory-system-passage-2/", "id": "respiratory-system---passage-2", "title": "Residual lung volume in a patient", "description": "This passage will test your knowledge on the respiratory system", "slug": "respiratory-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/lymphatic-system-passage-1/", "id": "lymphatic-system---passage-1", "title": "Lymph system function during cirrhosis", "slug": "lymphatic-system-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/lymphatic-system-passage-2/", "id": "lymphatic-system---passage-2", "title": "Studying lymph in a model system", "slug": "lymphatic-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/immune-system-passage-1/", "id": "immune-system---passage-1", "title": "Fighting infection with adaptive immunity", "description": "Immune System - Passage 1", "slug": "immune-system-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/immune-system-passage-2/", "id": "immune-system---passage-2", "title": "Neutrophil proliferation and disease", "description": "Immune System - Passage 2", "slug": "immune-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/renal-system-passage-1/", "id": "renal-system---passage-1", "title": "Hair dye chemicals and cancer", "description": "Renal system - Passage 1", "slug": "renal-system-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/renal-system-passage-2/", "id": "renal-system---passage-2", "title": "Measuring kidney function", "description": "Renal system - Passage 2", "slug": "renal-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/renal-regulation-of-blood-pressure-passage-1/", "id": "renal-regulation-of-blood-pressure---passage-1", "title": "Blood pressure regulation in the kidney", "description": "questions", "slug": "renal-regulation-of-blood-pressure-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/renal-regulation-of-blood-pressure-passage-2/", "id": "renal-regulation-of-blood-pressure---passage-2", "title": "Syndrome of Inappropriate Antidiuretic Hormone", "description": "questions", "slug": "renal-regulation-of-blood-pressure-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/gastrointestinal-system-passage-1/", "id": "gastrointestinal-system---passage-1", "title": "Hormonal control of weight loss", "description": "Gastrointestinal system - Passage 1", "slug": "gastrointestinal-system-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/gastrointestinal-system-passage-2/", "id": "gastrointestinal-system---passage-2", "title": "Why rabbits can digest cellulose", "description": "Gastrointestinal system - Passage 2", "slug": "gastrointestinal-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/muscular-system-passage-1/", "id": "muscular-system---passage-1", "title": "Autoimmune disorders of the muscle", "slug": "muscular-system-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/muscular-system-passage-2/", "id": "muscular-system---passage-2", "title": "The detection of myocardial infarction", "slug": "muscular-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/skeletal-system-passage-1/", "id": "skeletal-system---passage-1", "title": "Osteoporosis and bone density", "description": "Skeletal System - Passage 1", "slug": "skeletal-system-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/skeletal-system-passage-2/", "id": "skeletal-system---passage-2", "title": "Bone development", "description": "Skeletal System - Passage 2", "slug": "skeletal-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/integumentary-quiz-passage-1/", "id": "integumentary-quiz-passage-1", "title": "How to remove a tattoo", "description": "Integumentary Quiz Passage 1", "slug": "integumentary-quiz-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/integumentary-quiz-passage-2/", "id": "integumentary-quiz-passage-2", "title": "Skin cancer prevention", "description": "Integumentary Quiz Passage 2", "slug": "integumentary-quiz-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/control-of-gene-expression-in-eukaryotes-stat3-and-hyper-ige-syndrome/", "id": "control-of-gene-expression-in-eukaryotes--stat3-and-hyper-ige-syndrome", "title": "Control of gene expression in eukaryotes: STAT3 and hyper IgE syndrome", "description": "Questions related to the transmission of genetic information from the gene to the protein", "slug": "control-of-gene-expression-in-eukaryotes-stat3-and-hyper-ige-syndrome", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/control-of-gene-expression-in-prokaryotes-the-lac-operon-model-/", "id": "control-of-gene-expression-in-prokaryotes--the-lac-operon-model-", "title": "Control of gene expression in prokaryotes: the lac operon model", "description": "Questions related to the transmission of genetic information from the gene to the protein", "slug": "control-of-gene-expression-in-prokaryotes-the-lac-operon-model-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/cd40-receptor-expression-in-hyper-igm-syndrome/", "id": "cd40-receptor-expression-in-hyper-igm-syndrome", "title": "CD40 receptor expression in hyper IgM syndrome", "description": "Questions related to nonenzymatic protein function.", "slug": "cd40-receptor-expression-in-hyper-igm-syndrome", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/clindamycin-resistance-in-staphylococcus-aureus/", "id": "clindamycin-resistance-in-staphylococcus-aureus", "title": "Clindamycin resistance in Staphylococcus aureus", "description": "Questions related to the structure, growth, physiology and genetics of prokaryotes and viruses.", "slug": "clindamycin-resistance-in-staphylococcus-aureus", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/basic-concepts-in-bioenergetics-phosphoryl-group-transfers-and-atp-hydrolysis/", "id": "basic-concepts-in-bioenergetics--phosphoryl-group-transfers-and-atp-hydrolysis", "title": "Basic concepts in bioenergetics: phosphoryl group transfers and ATP hydrolysis", "description": "Questions related to the principles of bioenergetics and fuel molecule metabolism", "slug": "basic-concepts-in-bioenergetics-phosphoryl-group-transfers-and-atp-hydrolysis", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/virulence-factors-in-outbreak-strain-cholera/", "id": "virulence-factors-in-outbreak-strain-cholera", "title": "Virulence factors in outbreak-strain cholera", "description": "Questions related to the structure, growth, physiology and genetics of prokaryotes and viruses.", "slug": "virulence-factors-in-outbreak-strain-cholera", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-evolution-of-gecko-toepads/", "id": "the-evolution-of-gecko-toepads", "title": "The evolution of gecko toepads", "description": "Questions related to evolution", "slug": "the-evolution-of-gecko-toepads", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-thermodynamics-of-atp-hydrolysis-in-living-cells/", "id": "the-thermodynamics-of-atp-hydrolysis-in-living-cells", "title": "The thermodynamics of ATP hydrolysis in living cells", "description": "Questions related to the principles of bioenergetics and fuel molecule metabolism", "slug": "the-thermodynamics-of-atp-hydrolysis-in-living-cells", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/molecular-genetics-and-microbiology-of-zaire-ebolavirus/", "id": "molecular-genetics-and-microbiology-of-zaire-ebolavirus", "title": "Molecular genetics and microbiology of Zaire Ebolavirus", "description": "Questions related to the viral life cycle", "slug": "molecular-genetics-and-microbiology-of-zaire-ebolavirus", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/molecular-targets-of-antiretroviral-therapies/", "id": "molecular-targets-of-antiretroviral-therapies", "title": "Molecular targets of antiretroviral therapies", "description": "Questions related to the viral life cycle", "slug": "molecular-targets-of-antiretroviral-therapies", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/chronic-myelogenous-leukemia-and-the-philadelphia-chromosome-/", "id": "chronic-myelogenous-leukemia-and-the-philadelphia-chromosome-", "title": "Chronic myelogenous leukemia and the Philadelphia chromosome", "description": "Questions related to the circulatory system", "slug": "chronic-myelogenous-leukemia-and-the-philadelphia-chromosome-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/a-clinical-approach-to-anemia-solve-the-case/", "id": "a-clinical-approach-to-anemia--solve-the-case", "title": "A clinical approach to anemia: solve the case", "description": "Questions related to the hematologic system", "slug": "a-clinical-approach-to-anemia-solve-the-case", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/nervous-system-disorders-i-als/", "id": "nervous-system-disorders-i--als", "title": "Nervous system disorders I: ALS", "description": "Questions related to the nervous system", "slug": "nervous-system-disorders-i-als", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/nervous-system-disorders-ii-ms/", "id": "nervous-system-disorders-ii--ms", "title": "Nervous system disorders II: MS", "description": "Questions related to the nervous system", "slug": "nervous-system-disorders-ii-ms", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/sn-passage-1/", "id": "sn-passage-1", "title": "Hyper-IgM syndrome", "slug": "sn-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/dna-technology-passage-1/", "id": "dna-technology--passage-1", "title": "Recombinant DNA technology", "description": "DNA Technology passage 1", "slug": "dna-technology-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/sn-passage-2/", "id": "sn-passage-2", "title": "Antibiotic resistance in Staphyloccus aureus", "slug": "sn-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/neurofibromin-mutations-in-mice-populations/", "id": "neurofibromin-mutations-in-mice-populations", "title": "Neurofibromin mutations in mice populations", "description": "This passage will test your knowledge in foundational concept 1C", "slug": "neurofibromin-mutations-in-mice-populations", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/stoichiometry-i-passage-properties-of-acetic-acid/", "id": "stoichiometry-i-passage--properties-of-acetic-acid", "title": "Stoichiometry and the properties of acetic acid", "description": "Stoichiometry I Passage: Properties of acetic acid", "slug": "stoichiometry-i-passage-properties-of-acetic-acid", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-speed-limit-of-dna-polymerase-/", "id": "the--speed-limit--of-dna-polymerase-", "title": "The \u201cSpeed Limit\u201d of DNA polymerase", "description": "The \u201cSpeed Limit\u201d of DNA Polymerase", "slug": "the-speed-limit-of-dna-polymerase-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/dna-motion-in-gel-electrophoresis-/", "id": "dna-motion-in-gel-electrophoresis-", "title": "DNA motion in gel electrophoresis", "description": "DNA Motion in Gel Electrophoresis", "slug": "dna-motion-in-gel-electrophoresis-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/cancer-and-hexokinase/", "id": "cancer-and-hexokinase", "title": "Cancer and hexokinase", "description": "Cancer and Hexokinase", "slug": "cancer-and-hexokinase", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-structure-growth-physiology-and-genetics-of-prokaryotes-and-viruses/", "id": "the-structure--growth--physiology--and-genetics-of-prokaryotes-and-viruses", "title": "Cefoxitin disk diffusion versus mecA PCR for MRSA detection", "description": "Cefoxitin disk diffusion versus mecA PCR for MRSA detection", "slug": "the-structure-growth-physiology-and-genetics-of-prokaryotes-and-viruses", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-structure-growth-physiology-and-genetics-of-prokaryotes-and-viruses-2/", "id": "the-structure--growth--physiology--and-genetics-of-prokaryotes-and-viruses-2", "title": "Signaling in staphylococcal toxic shock syndrome", "description": "Signaling in staphylococcal Toxic Shock Syndrome", "slug": "the-structure-growth-physiology-and-genetics-of-prokaryotes-and-viruses-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/assemblies-of-molecules-cells-and-groups-of-cells-within-single-cellular-and-multicellular-organisms/", "id": "assemblies-of-molecules--cells-and-groups-of-cells-within-single-cellular-and-multicellular-organisms", "title": "Immunology of acute vs. chronic inflammation", "description": "Immunology of Acute vs. Chronic Inflammation", "slug": "assemblies-of-molecules-cells-and-groups-of-cells-within-single-cellular-and-multicellular-organisms", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/antibody-class-differences/", "id": "antibody-class-differences", "title": "Antibody class differences", "description": "Antibody Class Differences", "slug": "antibody-class-differences", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/innate-vs-adaptive-immunity/", "id": "innate-vs-adaptive-immunity", "title": "Innate vs adaptive immunity", "description": "Innate vs Adaptive Immunity", "slug": "innate-vs-adaptive-immunity", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/dna-polymerase-kinetics-and-dna-replication/", "id": "dna-polymerase--kinetics-and-dna-replication", "title": "DNA polymerase: Kinetics and DNA replication", "description": "DNA Polymerase: Kinetics and DNA Replication", "slug": "dna-polymerase-kinetics-and-dna-replication", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/do-artificial-sweeteners-increase-diabetes-risk-/", "id": "do-artificial-sweeteners-increase-diabetes-risk-", "title": "Do artificial sweeteners increase diabetes risk?", "description": "Do artificial sweeteners increase diabetes risk?", "slug": "do-artificial-sweeteners-increase-diabetes-risk-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-underlying-mechanism-of-milk-allergies-/", "id": "the-underlying-mechanism-of-milk-allergies-", "title": "The underlying mechanism of milk allergies", "description": "The underlying mechanism of milk allergies", "slug": "the-underlying-mechanism-of-milk-allergies-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/a-potential-cure-for-ebola-hemorrhagic-fever/", "id": "a-potential-cure-for-ebola-hemorrhagic-fever", "title": "A potential cure for ebola hemorrhagic fever", "description": "A potential cure for ebola hemorrhagic fever", "slug": "a-potential-cure-for-ebola-hemorrhagic-fever", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/neurofibromin-mutations-in-mice-populations-passage-2/", "id": "neurofibromin-mutations-in-mice-populations---passage-2", "title": "Repetitive nerve stimulation in Myasthenia gravis patients", "description": "Repetitive nerve stimulation in Myasthenia gravis patients", "slug": "neurofibromin-mutations-in-mice-populations-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/follicular-lymphoma-bcl-2-and-cell-growth/", "id": "follicular-lymphoma--bcl-2--and-cell-growth", "title": "Follicular lymphoma, Bcl-2, and cell growth", "description": "Follicular Lymphoma, Bcl-2, and Cell Growth", "slug": "follicular-lymphoma-bcl-2-and-cell-growth", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/-age-related-memory-loss-rbap48-/", "id": "-age-related-memory-loss----rbap48-", "title": "Age-related memory loss -- RbAp48", "description": "Age-Related Memory Loss -- RbAp48", "slug": "-age-related-memory-loss-rbap48-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/holoprosencephaly-a-medical-condition-with-devastating-consequences/", "id": "holoprosencephaly--a-medical-condition-with-devastating-consequences", "title": "Holoprosencephaly: A medical condition with devastating consequences", "description": "Holoprosencephaly: a medical condition with devastating consequences", "slug": "holoprosencephaly-a-medical-condition-with-devastating-consequences", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/carbohydrates-the-structure-and-function-of-glycogen/", "id": "carbohydrates--the-structure-and-function-of-glycogen", "title": "Carbohydrates: The structure and function of glycogen", "description": "The structure and function of glycogen.", "slug": "carbohydrates-the-structure-and-function-of-glycogen", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/inherited-disorders-marfan-syndrome/", "id": "inherited-disorders--marfan-syndrome", "title": "Inherited disorders: Marfan syndrome", "description": "Inherited disorders: Marfan syndrome", "slug": "inherited-disorders-marfan-syndrome", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/genetic-recombination-and-conditional-knockouts/", "id": "genetic-recombination-and-conditional-knockouts", "title": "Genetic recombination and conditional knockouts", "description": "Genetic Recombination and Conditional Knockouts", "slug": "genetic-recombination-and-conditional-knockouts", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/inherited-disorders-duchenne-muscular-dystrophy/", "id": "inherited-disorders--duchenne-muscular-dystrophy", "title": "Inherited disorders: Duchenne muscular dystrophy", "description": "Inherited disorders: Duchenne muscular dystrophy", "slug": "inherited-disorders-duchenne-muscular-dystrophy", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/brown-adipose-tissue-and-metabolism-1/", "id": "brown-adipose-tissue-and-metabolism-1", "title": "Brown adipose tissue and metabolism", "description": "Questions pertaining to adipose tissue and metabolism", "slug": "brown-adipose-tissue-and-metabolism-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/the-role-of-glycolysis-and-the-pentose-phosphate-pathway-in-fatty-acid-synthesis-1/", "id": "the-role-of-glycolysis-and-the-pentose-phosphate-pathway-in-fatty-acid-synthesis-1", "title": "The role of glycolysis and the pentose-phosphate pathway in fatty acid synthesis", "description": "The role of glycolysis and the pentose-phosphate pathway in fatty acid synthesis", "slug": "the-role-of-glycolysis-and-the-pentose-phosphate-pathway-in-fatty-acid-synthesis-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/glucose-6-phosphate-dehydrogenase-and-the-most-important-function-of-the-pentose-phosphate-pathway/", "id": "glucose-6-phosphate-dehydrogenase-and-the-most-important-function-of-the-pentose-phosphate-pathway", "title": "Glucose-6-phosphate dehydrogenase and the most important function of the pentose phosphate pathway", "description": "Glucose-6-phosphate dehydrogenase and the most important function of the pentose phosphate pathway", "slug": "glucose-6-phosphate-dehydrogenase-and-the-most-important-function-of-the-pentose-phosphate-pathway", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/brown-adipose-tissue-and-metabolism-passage-2/", "id": "brown-adipose-tissue-and-metabolism-passage-2", "title": "Pancreatitis and pancreatic cells", "description": "Brown adipose tissue and metabolism passage 1", "slug": "brown-adipose-tissue-and-metabolism-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/cs-passage-1/", "id": "cs-passage-1", "title": "Recombinant DNA and cloning", "slug": "cs-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/a-young-patient-with-type-1-diabetes/", "id": "a-young-patient-with-type-1-diabetes", "title": "A young patient with Type 1 diabetes", "description": "A young patient with Type 1 diabetes", "slug": "a-young-patient-with-type-1-diabetes", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/free-energy-photosynthesis-and-cellular-respiration-/", "id": "free-energy--photosynthesis--and-cellular-respiration-", "title": "Free energy, photosynthesis, and cellular respiration", "slug": "free-energy-photosynthesis-and-cellular-respiration-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/induced-stem-cells-from-healthy-adults/", "id": "induced-stem-cells-from-healthy-adults", "title": "Induced stem cells from healthy adults", "description": "Induced stem cells from healthy adults", "slug": "induced-stem-cells-from-healthy-adults", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/cs-passage-3/", "id": "cs-passage-3", "title": "Spherical erythrocytes and hemolysis", "slug": "cs-passage-3", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/rh-passage-1/", "id": "rh-passage-1", "title": "The vagus nerve and mice", "slug": "rh-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/rh-passage-2/", "id": "rh-passage-2", "title": "Neurodegeneration and genome mutations", "slug": "rh-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/rh-passage-3/", "id": "rh-passage-3", "title": "HIV and drug therapy", "slug": "rh-passage-3", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/rh-passage-4/", "id": "rh-passage-4", "title": "Swine flu and laser treatment", "description": "The structure, growth, physiology, and genetics of prokaryotes and viruses", "slug": "rh-passage-4", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/initial-steps-in-the-metabolism-of-dietary-monosaccharides/", "id": "initial-steps-in-the-metabolism-of-dietary-monosaccharides", "title": "Initial steps in the metabolism of dietary monosaccharides", "description": "Initial steps in the metabolism of dietary monosaccharides", "slug": "initial-steps-in-the-metabolism-of-dietary-monosaccharides", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/pancreatitis-and-pancreatic-cells/", "id": "pancreatitis-and-pancreatic-cells", "title": "Pancreatitis and pancreatic Cells", "description": "Pancreatitis and Pancreatic Cells", "slug": "pancreatitis-and-pancreatic-cells", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/congestive-heart-failure-and-diuretics/", "id": "congestive-heart-failure-and-diuretics", "title": "Congestive heart failure and diuretics", "description": "Congestive Heart Failure and Diuretics", "slug": "congestive-heart-failure-and-diuretics", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/typhoid-toxin/", "id": "typhoid-toxin", "title": "Typhoid toxin", "description": "Typhoid Toxin", "slug": "typhoid-toxin", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/preventing-lipopolysaccharide-formation-in-cystic-fibrosis-patients/", "id": "preventing-lipopolysaccharide-formation-in-cystic-fibrosis-patients", "title": "Preventing lipopolysaccharide formation in cystic fibrosis patients", "description": "Preventing Lipopolysaccharide Formation in Cystic Fibrosis Patients", "slug": "preventing-lipopolysaccharide-formation-in-cystic-fibrosis-patients", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/cellular-effects-of-metformin-a-drug-for-diabetes-mellitus/", "id": "cellular-effects-of-metformin--a-drug-for-diabetes-mellitus", "title": "Cellular effects of metformin, a drug for diabetes mellitus", "description": "Cellular Effects of Metformin, a drug for Diabetes Mellitus", "slug": "cellular-effects-of-metformin-a-drug-for-diabetes-mellitus", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/measuring-glomerular-filtration-rate-of-the-kidneys-with-inulin/", "id": "measuring-glomerular-filtration-rate-of-the-kidneys-with-inulin", "title": "Measuring glomerular filtration rate of the kidneys with insulin", "description": "Measuring Glomerular Filtration Rate of the Kidneys with Inulin", "slug": "measuring-glomerular-filtration-rate-of-the-kidneys-with-inulin", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/patient-with-a-missing-cerebellum/", "id": "patient-with-a-missing-cerebellum", "title": "Patient with a missing cerebellum", "slug": "patient-with-a-missing-cerebellum", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/could-complete-darkness-be-the-cure-for-amblyopia-/", "id": "could-complete-darkness-be-the-cure-for-amblyopia-", "title": "Could complete darkness be the cure for amblyopia?", "slug": "could-complete-darkness-be-the-cure-for-amblyopia-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/activation-of-t-lymphocytes/", "id": "activation-of-t-lymphocytes", "title": "Activation of T lymphocytes", "description": "Questions pertaining to activation of T lymphocytes", "slug": "activation-of-t-lymphocytes", "kind": "Exercise"}], "in_knowledge_map": false, "description": "These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/by-nc-sa/3.0/us/).", "node_slug": "biological-sciences-practice-tut", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut", "extended_slug": "test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut", "kind": "Topic", "slug": "biological-sciences-practice-tut"}], "in_knowledge_map": false, "description": "Go ahead and practice some passage-based questions!", "node_slug": "biological-sciences-practice", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/biological-sciences-practice", "extended_slug": "test-prep/mcat/biological-sciences-practice", "kind": "Topic", "slug": "biological-sciences-practice"}, {"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/test-prep/mcat/physical-sciences-practice/", "id": "physical-sciences-practice", "hide": false, "title": "Chemical and Physical Foundations of Biological Systems Passages", "child_data": [{"kind": "Topic", "id": "xf3630cde"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/", "id": "physical-sciences-practice-tut", "hide": false, "title": "Chemical and physical sciences practice passage questions", "child_data": [{"kind": "Exercise", "id": "x5d9af6c4"}, {"kind": "Exercise", "id": "x9507a431"}, {"kind": "Exercise", "id": "x5125d333"}, {"kind": "Exercise", "id": "x20dd0062"}, {"kind": "Exercise", "id": "xb71379dd"}, {"kind": "Exercise", "id": "xb191bb92"}, {"kind": "Exercise", "id": "x768e3c68"}, {"kind": "Exercise", "id": "x64f7362a"}, {"kind": "Exercise", "id": "x3fcd5049"}, {"kind": "Exercise", "id": "x463a8cf1"}, {"kind": "Exercise", "id": "x6edf5f11"}, {"kind": "Exercise", "id": "x09459e10"}, {"kind": "Exercise", "id": "x70132e0d"}, {"kind": "Exercise", "id": "x080e8829"}, {"kind": "Exercise", "id": "xefd88f21"}, {"kind": "Exercise", "id": "x7ae139cc"}, {"kind": "Exercise", "id": "xa21a8ced"}, {"kind": "Exercise", "id": "x049b9d18"}, {"kind": "Exercise", "id": "x6d22c4a9"}, {"kind": "Exercise", "id": "xea82a629"}, {"kind": "Exercise", "id": "x0dad984e"}, {"kind": "Exercise", "id": "xfbe7a1c0"}, {"kind": "Exercise", "id": "x61c84dd2"}, {"kind": "Exercise", "id": "x120ce4cf"}, {"kind": "Exercise", "id": "x8427de18"}, {"kind": "Exercise", "id": "x915d4794"}, {"kind": "Exercise", "id": "x990d271a"}, {"kind": "Exercise", "id": "x88e7282e"}, {"kind": "Exercise", "id": "x31fa91b0"}, {"kind": "Exercise", "id": "xa5e3b587"}, {"kind": "Exercise", "id": "x4ff6972e"}, {"kind": "Exercise", "id": "x06734bf3"}, {"kind": "Exercise", "id": "xd451c9cb"}, {"kind": "Exercise", "id": "x22d08525"}, {"kind": "Exercise", "id": "x517fe003"}, {"kind": "Exercise", "id": "x65a1fe72"}, {"kind": "Exercise", "id": "xf2d8c9da"}, {"kind": "Exercise", "id": "x5fe2102d"}, {"kind": "Exercise", "id": "x431a6f04"}, {"kind": "Exercise", "id": "x0cbdd6de"}, {"kind": "Exercise", "id": "x67872f71"}, {"kind": "Exercise", "id": "xa9b29510"}, {"kind": "Exercise", "id": "x0d41be91"}, {"kind": "Exercise", "id": "x96f23587"}, {"kind": "Exercise", "id": "x452d6a9b"}, {"kind": "Exercise", "id": "xefad2c52"}, {"kind": "Exercise", "id": "x760077d6"}, {"kind": "Exercise", "id": "xd17cb568"}, {"kind": "Exercise", "id": "x43445287"}, {"kind": "Exercise", "id": "xe19d505e"}, {"kind": "Exercise", "id": "x345b55e0"}, {"kind": "Exercise", "id": "x269fe1a8"}, {"kind": "Exercise", "id": "xb7d4e99b"}, {"kind": "Exercise", "id": "xeb70281d"}, {"kind": "Exercise", "id": "x26d35df6"}, {"kind": "Exercise", "id": "xc9fd0ffe"}, {"kind": "Exercise", "id": "x4e410dff"}, {"kind": "Exercise", "id": "x34097cba"}, {"kind": "Exercise", "id": "x4443a44c"}, {"kind": "Exercise", "id": "x4dcb0622"}, {"kind": "Exercise", "id": "xb7247f6e"}, {"kind": "Exercise", "id": "xabd6239d"}, {"kind": "Exercise", "id": "xe63823d9"}, {"kind": "Exercise", "id": "x74c14c39"}, {"kind": "Exercise", "id": "x7b299991"}, {"kind": "Exercise", "id": "x8c939eab"}, {"kind": "Exercise", "id": "x5375f35a"}, {"kind": "Exercise", "id": "xf6345441"}, {"kind": "Exercise", "id": "x65784370"}, {"kind": "Exercise", "id": "xa6a41c59"}, {"kind": "Exercise", "id": "xfca0d3e6"}, {"kind": "Exercise", "id": "xddec9221"}, {"kind": "Exercise", "id": "x15d94f2f"}, {"kind": "Exercise", "id": "x5bb53d8c"}, {"kind": "Exercise", "id": "x6d054387"}, {"kind": "Exercise", "id": "xdf499d62"}, {"kind": "Exercise", "id": "x352c8295"}, {"kind": "Exercise", "id": "x07df5079"}, {"kind": "Exercise", "id": "xff02f289"}, {"kind": "Exercise", "id": "x7680098d"}, {"kind": "Exercise", "id": "x4767bbc2"}, {"kind": "Exercise", "id": "x1bde8ac3"}, {"kind": "Exercise", "id": "x7de6f51a"}, {"kind": "Exercise", "id": "x0cfaa835"}, {"kind": "Exercise", "id": "x79ac9391"}, {"kind": "Exercise", "id": "xafe13e82"}, {"kind": "Exercise", "id": "x24a1f4d4"}, {"kind": "Exercise", "id": "x0619ad07"}, {"kind": "Exercise", "id": "x614c8b5a"}, {"kind": "Exercise", "id": "xa5e245d1"}, {"kind": "Exercise", "id": "xc6eadb71"}, {"kind": "Exercise", "id": "x18c10ec3"}, {"kind": "Exercise", "id": "x35e8947e"}, {"kind": "Exercise", "id": "x92722559"}, {"kind": "Exercise", "id": "xb0c221c5"}, {"kind": "Exercise", "id": "x4dd4fcf6"}, {"kind": "Exercise", "id": "x3f400997"}, {"kind": "Exercise", "id": "x89fea239"}, {"kind": "Exercise", "id": "xd7e819c8"}, {"kind": "Exercise", "id": "x3652444f"}, {"kind": "Exercise", "id": "xc14e295f"}, {"kind": "Exercise", "id": "xe6d1be8b"}, {"kind": "Exercise", "id": "x91c65dfd"}, {"kind": "Exercise", "id": "x0a0d90db"}, {"kind": "Exercise", "id": "xd3795489"}, {"kind": "Exercise", "id": "xa6fea7ca"}, {"kind": "Exercise", "id": "xc60599d6"}, {"kind": "Exercise", "id": "xe0826d75"}, {"kind": "Exercise", "id": "x7835aea5"}, {"kind": "Exercise", "id": "xa2e631c6"}], "children": [{"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/understanding-cardiac-pressure-volume-curves/", "id": "understanding-cardiac-pressure-volume-curves", "title": "Understanding cardiac pressure-volume curves", "slug": "understanding-cardiac-pressure-volume-curves", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/imaging-tissue-structures-using-muon-tomography/", "id": "imaging-tissue-structures-using-muon-tomography", "title": "Imaging tissue structures using muon tomography", "description": "Questions related to particle scattering and microscopy.", "slug": "imaging-tissue-structures-using-muon-tomography", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-effect-of-contrast-agents-on-mri-signals/", "id": "the-effect-of-contrast-agents-on-mri-signals", "title": "The effect of contrast agents on MRI signals", "description": "Questions related to magnetism.", "slug": "the-effect-of-contrast-agents-on-mri-signals", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/analyzing-electrocardiogram-voltage-signals/", "id": "analyzing-electrocardiogram-voltage-signals", "title": "Analyzing electrocardiogram voltage signals", "description": "Questions related to periodic motion and waves.", "slug": "analyzing-electrocardiogram-voltage-signals", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-mechanics-of-standing-balance/", "id": "the-mechanics-of-standing-balance", "title": "The mechanics of standing balance", "description": "Questions related to phase changes", "slug": "the-mechanics-of-standing-balance", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/what-conditions-influence-lyophilisation-/", "id": "what-conditions-influence-lyophilisation-", "title": "What conditions influence lyophilisation?", "description": "Questions related to phase changes", "slug": "what-conditions-influence-lyophilisation-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/your-heart-does-work-a-relationship-of-pressure-and-volume/", "id": "your-heart-does-work--a-relationship-of-pressure-and-volume", "title": "Your heart does work: A relationship of pressure and volume", "description": "Questions related to PV diagrams", "slug": "your-heart-does-work-a-relationship-of-pressure-and-volume", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/gas-in-a-canister-with-a-piston/", "id": "gas-in-a-canister-with-a-piston", "title": "Heat engines and work", "description": "This passage tests your knowledge on the kinetic molecular theory of gases", "slug": "gas-in-a-canister-with-a-piston", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/tension-in-the-muscles/", "id": "tension-in-the-muscles", "title": "Tension in the muscles", "description": "This passage will test your knowledge on the force of tension", "slug": "tension-in-the-muscles", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/patients-in-a-wheelchair-on-a-ramp/", "id": "patients-in-a-wheelchair-on-a-ramp", "title": "Patients in a wheelchair", "description": "This passage will test your knowledge on forces on an inclined plane", "slug": "patients-in-a-wheelchair-on-a-ramp", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/biological-adaptations-in-response-to-physical-constraints-the-case-of-atlantic-salmon/", "id": "biological-adaptations-in-response-to-physical-constraints--the-case-of-atlantic-salmon", "title": "Biological adaptations in response to physical constraints: the case of Atlantic salmon", "description": "Questions related to the importance of fluids for the circulation of blood, gas movement, and gas exchange", "slug": "biological-adaptations-in-response-to-physical-constraints-the-case-of-atlantic-salmon", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/purification-of-caffeine/", "id": "purification-of-caffeine", "title": "Purification of caffeine", "description": "Questions related to purification techniques and chemical reactivity.", "slug": "purification-of-caffeine", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-kinetic-properties-of-ideal-gases/", "id": "the-kinetic-properties-of-ideal-gases", "title": "Ideal gases in medicine", "description": "This passage tests your knowledge on the kinetic molecular theory of gases", "slug": "the-kinetic-properties-of-ideal-gases", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/what-causes-red-blood-cells-to-sickle-/", "id": "what-causes-red-blood-cells-to-sickle-", "title": "What causes red blood cells to sickle?", "description": "Questions related to the structure and characteristics of hemoglobin proteins", "slug": "what-causes-red-blood-cells-to-sickle-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/fluids-in-motion-passage-1_1/", "id": "fluids-in-motion---passage-1", "title": "A fluid flowing through a tube", "description": "Passages that test your knowledge on fluids in motion", "slug": "fluids-in-motion-passage-1_1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/qualitative-analysis-of-contaminated-water-supply/", "id": "qualitative-analysis-of-contaminated-water-supply", "title": "Qualitative analysis of contaminated water supply", "description": "Questions related to qualitative analysis", "slug": "qualitative-analysis-of-contaminated-water-supply", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/fluids-in-morion-passage-2/", "id": "fluids-in-morion---passage-2", "title": "Water flowing out of a tank", "description": "Passages that test your knowledge on fluids in motion", "slug": "fluids-in-morion-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/applications-of-hard-soft-acid-base-theory/", "id": "applications-of-hard-soft-acid-base-theory", "title": "Applications of Hard-Soft Acid-Base theory", "description": "Questions related to the electronic structure and atomic chemical behavior of acid and bases", "slug": "applications-of-hard-soft-acid-base-theory", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/synthesis-of-anti-tumor-drug-combretastatin-and-its-derivatives/", "id": "synthesis-of-anti-tumor-drug-combretastatin-and-its-derivatives", "title": "Synthesis of anti-tumor drug Combretastatin and its derivatives", "description": "Questions related to organic synthesis of Combretastatin", "slug": "synthesis-of-anti-tumor-drug-combretastatin-and-its-derivatives", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/testing-new-suture-material/", "id": "testing-new-suture-material", "title": "Testing new suture material", "description": "This passage will test your knowledge on the force of tension", "slug": "testing-new-suture-material", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/vectors-and-scalers-passage-1/", "id": "vectors-and-scalers---passage-1", "title": "Swine flu in Finland", "description": "This passage will test your knowledge on vectors and scalars", "slug": "vectors-and-scalers-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/vectors-and-scalers-passage-2/", "id": "vectors-and-scalers---passage-2", "title": "Ancient Greek catapults and medical packs", "description": "This passage will test your knowledge on vectors and scalars", "slug": "vectors-and-scalers-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/newton-s-laws-and-equilibrium-passage-1/", "id": "newton-s-laws-and-equilibrium---passage-1", "title": "Forces on a kidney stone", "description": "This passage will test your knowledge on Newton's laws and equilibrium", "slug": "newton-s-laws-and-equilibrium-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/newton-s-laws-and-equilibrium-passage-2/", "id": "newton-s-laws-and-equilibrium---passage-2", "title": "Knee injuries in athletes", "description": "This passage will test your knowledge on Newton's laws and equilibrium", "slug": "newton-s-laws-and-equilibrium-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/speed-and-velocity-passage-1/", "id": "speed-and-velocity---passage-1", "title": "The speed of a neural impulse", "description": "This passage will test your knowledge on speed and velocity", "slug": "speed-and-velocity-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/speed-and-velocity-passage-2/", "id": "speed-and-velocity---passage-2", "title": "Blood flow in the arteries", "description": "This passage will test your knowledge on speed and velocity", "slug": "speed-and-velocity-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/acceleration-passage-1/", "id": "acceleration---passage-1", "title": "Concussions in professional athletes", "description": "This passage will test your knowledge on acceleration", "slug": "acceleration-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/acceleration-passage-2/", "id": "acceleration---passage-2", "title": "The world's fastest mammal", "description": "This passage will test your knowledge on acceleration", "slug": "acceleration-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/force-of-tension-passage-1/", "id": "force-of-tension---passage-1", "title": "Force of tension - Passage 1", "slug": "force-of-tension-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/normal-forces-passage-1/", "id": "normal-forces---passage-1", "title": "Frictional forces on mobility walkers", "description": "This passage will test your knowlege on normal forces", "slug": "normal-forces-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/normal-forces-passage-2/", "id": "normal-forces---passage-2", "title": "An elevator in a hospital", "description": "This passage will test your knowledge on normal forces", "slug": "normal-forces-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/forces-on-inclined-planes/", "id": "forces-on-inclined-planes", "title": "A ramp in an administrative office", "description": "This passage will test your knowledge on forces on inclined planes", "slug": "forces-on-inclined-planes", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/forces-on-inclined-planes-passage-2/", "id": "forces-on-inclined-planes---passage-2", "title": "Hills, inclement weather, and cars", "description": "This passage will test your knowledge on forces on inclined planes", "slug": "forces-on-inclined-planes-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/work-and-energy-passage-1/", "id": "work-and-energy---passage-1", "title": "Basal metabolic rate and energy expenditure", "description": "This passage will test your knowledge on work and energy", "slug": "work-and-energy-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/work-and-energy-passage-2/", "id": "work-and-energy---passage-2", "title": "Rollercoasters are energy at work!", "description": "This passage will test your knowledge on work and energy", "slug": "work-and-energy-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/fluids-at-rest-passage-1/", "id": "fluids-at-rest---passage-1", "title": "A scale under water", "description": "This passage will test your knowledge on fluids at rest", "slug": "fluids-at-rest-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/fluids-at-rest-passage-2/", "id": "fluids-at-rest---passage-2", "title": "Coronary heart disease and blood pressure", "description": "This passage will test your knowledge on fluids at rest", "slug": "fluids-at-rest-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/fluids-in-motion-passage-1_2/", "id": "fluids-in-motion--passage-1", "title": "The tubular system in an aquarium", "description": "This passage will test your knowledge on fluids in motion", "slug": "fluids-in-motion-passage-1_2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/fluids-in-motion-passage-2/", "id": "fluids-in-motion--passage-2", "title": "Hydrotherapy and full body immersion", "description": "This passage will test your knowledge on fluids in motion", "slug": "fluids-in-motion-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/gas-phase-passage-1/", "id": "gas-phase---passage-1", "title": "Chlorofluorocarbons and the environment", "description": "This passage will test your knowledge on the gas phase of molecules", "slug": "gas-phase-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/gas-phase-passage-2/", "id": "gas-phase---passage-2", "title": "Charles' law and gas in a piston", "description": "This passage will test your knowledge on the gas phase", "slug": "gas-phase-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/capacitors-passage-1/", "id": "capacitors---passage-1", "title": "Capacitors in electrocardiography monitors", "description": "This passage will test your knowledge on capacitors", "slug": "capacitors-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/capacitors-passage-2/", "id": "capacitors---passage-2", "title": "Cardiac dysrhythmia and defibrillators", "description": "This passage will test your knowledge on capacitors", "slug": "capacitors-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/electrostatics-passage-1/", "id": "electrostatics--passage-1", "title": "Electrostatics, medicine, and metal spheres", "description": "This passage will test your knowledge on electrostatics", "slug": "electrostatics-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/electrostatics-passage-2/", "id": "electrostatics--passage-2", "title": "Electric Field Treatments and electroporation", "description": "This passage will test your knowledge on electrostatics", "slug": "electrostatics-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/thin-lens-quiz-passage-1/", "id": "thin-lens-quiz-passage-1", "title": "Hyperopia and convex lenses", "description": "This passage will test your knowledge on lenses", "slug": "thin-lens-quiz-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/thin-lens-quiz-passage-2/", "id": "thin-lens-quiz-passage-2", "title": "Converging and diverging lenses in a lab", "description": "This passage will test your knowledge on lenses", "slug": "thin-lens-quiz-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/spherical-mirrors-passage-1/", "id": "spherical-mirrors---passage-1", "title": "A mirror in an operating room", "description": "This passage will test your knowledge on spherical mirrors", "slug": "spherical-mirrors-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/spherical-mirrors-passage-2/", "id": "spherical-mirrors---passage-2", "title": "Using scallops to correct vision", "description": "This passage will test your knowledge on spherical mirrors", "slug": "spherical-mirrors-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/reflection-and-refraction-passage-1/", "id": "reflection-and-refraction---passage-1", "title": "Eye disease and contact lenses", "description": "This passage will test your knowledge on eflection and refraction", "slug": "reflection-and-refraction-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/reflection-and-refraction-passage-2/", "id": "reflection-and-refraction---passage-2", "title": "An experiment with light rays and a prism", "description": "This passage will test your knowledge on reflection and Refraction - Passage 2", "slug": "reflection-and-refraction-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/sound-quiz-passage-1/", "id": "sound-quiz-passage-1", "title": "How movements influence an ultrasound", "description": "This passage will test your knowledge on sound and audition", "slug": "sound-quiz-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/sound-passage-2/", "id": "sound--passage-2", "title": "Resonance in a tube", "description": "This passage will test your knowledge on sound.", "slug": "sound-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/separations-and-purifications-passage-1/", "id": "separations-and-purifications---passage-1", "title": "Creating and separating acetone", "slug": "separations-and-purifications-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/separations-and-purifications-passage-2/", "id": "separations-and-purifications---passage-2", "title": "Separations and purifications - Passage 2", "slug": "separations-and-purifications-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/proteins-passage-1/", "id": "proteins---passage-1", "title": "Homocystinuria and its associate treatments", "description": "This passage will test your knowledge on proteins", "slug": "proteins-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/proteins-passage-2/", "id": "proteins---passage-2", "title": "Investigating families with hormone deficiencies", "slug": "proteins-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/enzymes-passage-1/", "id": "enzymes---passage-1", "title": "The influence of histones on genetic inheritance", "description": "This passage will test your knowledge on enzymes", "slug": "enzymes-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/enzymes-passage-2/", "id": "enzymes---passage-2", "title": "Lactate dehydrogenase and exhausted athletes", "description": "MCAT style passage and questions", "slug": "enzymes-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-circuit-elements-of-a-simple-defibrillator/", "id": "the-circuit-elements-of-a-simple-defibrillator", "title": "The circuit elements of a simple defibrillator", "description": "Questions related to circuit elements", "slug": "the-circuit-elements-of-a-simple-defibrillator", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/how-do-geckoes-stick-to-surfaces-/", "id": "how-do-geckoes-stick-to-surfaces-", "title": "How do geckoes stick to surfaces?", "description": "Questions related to forces", "slug": "how-do-geckoes-stick-to-surfaces-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/biochemistry-changes-that-occur-after-death/", "id": "biochemistry-changes-that-occur-after-death", "title": "Biochemistry changes that occur after death", "description": "Questions related to acid-base chemistry", "slug": "biochemistry-changes-that-occur-after-death", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/-using-a-freezing-point-depression-osmometer-to-measure-serum-osmolality/", "id": "-using-a-freezing-point-depression-osmometer-to-measure-serum-osmolality", "title": "Using a freezing point depression osmometer to measure serum osmolality", "description": "Questions related to osmolality and colligative properties", "slug": "-using-a-freezing-point-depression-osmometer-to-measure-serum-osmolality", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-refraction-of-light-through-the-human-eye/", "id": "the-refraction-of-light-through-the-human-eye", "title": "The refraction of light through the human eye", "description": "Questions reflated to refractions of light", "slug": "the-refraction-of-light-through-the-human-eye", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-effects-of-ultrasound-on-different-tissue-types/", "id": "the-effects-of-ultrasound-on-different-tissue-types", "title": "The effects of ultrasound on different tissue types", "description": "Questions related to ultrasound and acoustics", "slug": "the-effects-of-ultrasound-on-different-tissue-types", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/leukocytes-roll-on-blood-vessel-walls/", "id": "leukocytes-roll-on-blood-vessel-walls", "title": "Leukocytes roll on blood vessel walls", "description": "Questions related to the circulatory system", "slug": "leukocytes-roll-on-blood-vessel-walls", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/creating-fuel-from-algae/", "id": "creating-fuel-from-algae", "title": "Creating Fuel from Algae", "description": "Questions related to organic chemistry", "slug": "creating-fuel-from-algae", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/how-do-organisms-maintain-a-constant-ph-range-/", "id": "how-do-organisms-maintain-a-constant-ph-range-", "title": "How do organisms maintain a constant pH range?", "description": "Questions related to acids and bases", "slug": "how-do-organisms-maintain-a-constant-ph-range-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-bicarbonate-buffering-system-and-titration-curves/", "id": "the-bicarbonate-buffering-system-and-titration-curves", "title": "The bicarbonate buffering system and titration curves", "description": "Questions related to the unique nature of water and its solutions", "slug": "the-bicarbonate-buffering-system-and-titration-curves", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/neuronal-membranes-nature-s-capacitors/", "id": "neuronal-membranes--nature-s-capacitors", "title": "Neuronal membranes: Nature's capacitors", "description": "Questions related to Circuits and capacitors", "slug": "neuronal-membranes-nature-s-capacitors", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/doppler-effect-in-living-tissue/", "id": "doppler-effect-in-living-tissue", "title": "Doppler effect in living tissue", "description": "questions related to sound", "slug": "doppler-effect-in-living-tissue", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-effects-of-ear-canal-acoustics-on-hearing-ability/", "id": "the-effects-of-ear-canal-acoustics-on-hearing-ability", "title": "The effects of ear canal acoustics on hearing ability", "description": "Questions related to the acoustics of human hearing.", "slug": "the-effects-of-ear-canal-acoustics-on-hearing-ability", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-forearm-as-an-example-of-a-third-class-lever/", "id": "the-forearm-as-an-example-of-a-third-class-lever", "title": "The forearm as an example of a third-class lever", "description": "The Forearm as an Example of a Third-class Lever", "slug": "the-forearm-as-an-example-of-a-third-class-lever", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-forces-and-torques-acting-on-the-hip-joint/", "id": "the-forces-and-torques-acting-on-the-hip-joint", "title": "The forces and torques acting on the hip joint", "description": "The Forces and Torques Acting on the Hip Joint", "slug": "the-forces-and-torques-acting-on-the-hip-joint", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-chemical-structure-consequences-of-beta-lactams/", "id": "the-chemical-structure-consequences-of-beta-lactams", "title": "The chemical structure consequences of beta-lactams", "description": "The Chemical Structure Consequences of Beta-lactams", "slug": "the-chemical-structure-consequences-of-beta-lactams", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/aldehydes-and-ketones/", "id": "aldehydes-and-ketones", "title": "Aldehydes and ketones", "description": "Aldehydes and ketones", "slug": "aldehydes-and-ketones", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-effects-of-microgravity-on-muscle-tissues/", "id": "the-effects-of-microgravity-on-muscle-tissues", "title": "The effects of microgravity on muscle tissues", "description": "The effects of microgravity on muscle tissues", "slug": "the-effects-of-microgravity-on-muscle-tissues", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/comparing-the-stress-exerted-on-the-body-by-different-running-shoes/", "id": "comparing-the-stress-exerted-on-the-body-by-different-running-shoes", "title": "Comparing the stress exerted on the body by different running shoes", "description": "Comparing the stress exerted on the body by different running shoes", "slug": "comparing-the-stress-exerted-on-the-body-by-different-running-shoes", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/understanding-the-ballistics-of-gene-bombardment/", "id": "understanding-the-ballistics-of-gene-bombardment", "title": "Understanding the ballistics of gene bombardment", "description": "Understanding the ballistics of gene bombardment", "slug": "understanding-the-ballistics-of-gene-bombardment", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/analysis-of-image-production-by-the-human-eye/", "id": "analysis-of-image-production-by-the-human-eye", "title": "Analysis of image production by the human eye", "description": "Analysis of Image Production by the Human Eye", "slug": "analysis-of-image-production-by-the-human-eye", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/atoms-nuclear-decay-electronic-structure-and-atomic-chemical-behavior/", "id": "atoms--nuclear-decay--electronic-structure--and-atomic-chemical-behavior", "title": "Alcohol production and absorption", "description": "Alcohol production and absorption", "slug": "atoms-nuclear-decay-electronic-structure-and-atomic-chemical-behavior", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-structure-and-function-of-glycogen-/", "id": "the-structure-and-function-of-glycogen-", "title": "The structure and function of glycogen.", "description": "The structure and function of glycogen.", "slug": "the-structure-and-function-of-glycogen-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/elasticity-and-kinetics-of-vulcanized-rubber/", "id": "elasticity-and-kinetics-of-vulcanized-rubber", "title": "Elasticity and kinetics of vulcanized rubber", "description": "Elasticity and Kinetics of Vulcanized Rubber", "slug": "elasticity-and-kinetics-of-vulcanized-rubber", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/preventing-barotrauma-in-deep-sea-divers/", "id": "preventing-barotrauma-in-deep-sea-divers", "title": "Preventing barotrauma in deep-sea divers", "description": "Preventing barotrauma in deep-sea divers", "slug": "preventing-barotrauma-in-deep-sea-divers", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/pressure-regulation-and-fluid-dynamics-of-the-respiratory-system/", "id": "pressure-regulation-and-fluid-dynamics-of-the-respiratory-system", "title": "Pressure regulation and fluid dynamics of the respiratory system", "description": "Pressure regulation and fluid dynamics of the respiratory system", "slug": "pressure-regulation-and-fluid-dynamics-of-the-respiratory-system", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/principles-of-chemical-thermodynamics-and-kinetics/", "id": "principles-of-chemical-thermodynamics-and-kinetics", "title": "Thermodynamics of gallium arsenide formation", "description": "Thermodynamics of Gallium Arsenide Formation", "slug": "principles-of-chemical-thermodynamics-and-kinetics", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/using-ultrasounds-to-measure-blood-flow-velocity-1/", "id": "using-ultrasounds-to-measure-blood-flow-velocity-1", "title": "Using ultrasounds to measure blood flow velocity", "description": "Questions related to ultrasound and blood flow velocity", "slug": "using-ultrasounds-to-measure-blood-flow-velocity-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-radioactivity-of-iodine-131/", "id": "the-radioactivity-of-iodine-131", "title": "The radioactivity of iodine-131", "description": "The Radioactivity of Iodine-131", "slug": "the-radioactivity-of-iodine-131", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/characteristics-of-various-therapeutic-radioisotopes-/", "id": "characteristics-of-various-therapeutic-radioisotopes-", "title": "Characteristics of various therapeutic radioisotopes", "description": "Characteristics of Various Therapeutic Radioisotopes", "slug": "characteristics-of-various-therapeutic-radioisotopes-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/understanding-the-properties-of-radioactive-tracers/", "id": "understanding-the-properties-of-radioactive-tracers", "title": "Understanding the properties of radioactive tracers", "description": "Understanding the properties of radioactive tracers", "slug": "understanding-the-properties-of-radioactive-tracers", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/melting-point-and-thermodynamics-of-double-stranded-dna-1/", "id": "melting-point-and-thermodynamics-of-double-stranded-dna-1", "title": "Melting point and thermodynamics of double-stranded DNA", "description": "Melting Point and Thermodynamics of Double-Stranded DNA", "slug": "melting-point-and-thermodynamics-of-double-stranded-dna-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/pure-tone-audiometry-in-diagnosing-hearing-loss/", "id": "pure-tone-audiometry-in-diagnosing-hearing-loss", "title": "Pure tone audiometry in diagnosing hearing loss", "description": "Questions related to how light and sound interact with matter", "slug": "pure-tone-audiometry-in-diagnosing-hearing-loss", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/isothermal-titration-calorimetry-in-drug-development/", "id": "isothermal-titration-calorimetry-in-drug-development", "title": "Isothermal titration calorimetry in drug development", "description": "Isothermal Titration Calorimetry in Drug Development", "slug": "isothermal-titration-calorimetry-in-drug-development", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/-mass-spectrometry-in-the-operating-room/", "id": "-mass-spectrometry-in-the-operating-room", "title": "Mass spectrometry in the operating room", "description": "Mass spectrometry in the operating room", "slug": "-mass-spectrometry-in-the-operating-room", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/cs-passage-2/", "id": "cs-passage-2", "title": "Separating enantiomers in a prescription drug", "slug": "cs-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/cs-passage-4/", "id": "cs-passage-4", "title": "Technetium decay and its cardiac application", "slug": "cs-passage-4", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-physics-of-eyesight-correction/", "id": "the-physics-of-eyesight-correction", "title": "The physics of eyesight correction", "description": "Questions pertaining to the physics of eyesight correction", "slug": "the-physics-of-eyesight-correction", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/flow-and-poiseuille-s-law-in-operation/", "id": "flow-and-poiseuille-s-law-in-operation", "title": "Flow and poiseuille's law in operation", "slug": "flow-and-poiseuille-s-law-in-operation", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/the-role-of-the-bicarbonate-buffer-system-in-regulating-blood-ph/", "id": "the-role-of-the-bicarbonate-buffer-system-in-regulating-blood-ph", "title": "The role of the bicarbonate buffer system in regulating blood pH", "slug": "the-role-of-the-bicarbonate-buffer-system-in-regulating-blood-ph", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/using-optical-traps-to-manipulate-single-dna-strands/", "id": "using-optical-traps-to-manipulate-single-dna-strands", "title": "Using optical traps to manipulate single DNA strands", "slug": "using-optical-traps-to-manipulate-single-dna-strands", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/clinical-applications-of-tuning-forks/", "id": "clinical-applications-of-tuning-forks", "title": "Clinical applications of tuning forks", "description": "Questions pertaining to clinical applications of tuning forks", "slug": "clinical-applications-of-tuning-forks", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/physics-of-walking-and-running/", "id": "physics-of-walking-and-running", "title": "Physics of walking and running", "description": "Questions pertaining to the physics of walking and running", "slug": "physics-of-walking-and-running", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/selection-of-radionuclides-for-radiopharmaceuticals/", "id": "selection-of-radionuclides-for-radiopharmaceuticals", "title": "Selection of radionuclides for radiopharmaceuticals", "description": "Questions pertaining to the selection of radionuclides for radiopharmaceuticals", "slug": "selection-of-radionuclides-for-radiopharmaceuticals", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/shortwave-diathermy-in-rehabilitative-medicine/", "id": "shortwave-diathermy-in-rehabilitative-medicine", "title": "Shortwave diathermy in rehabilitative medicine", "slug": "shortwave-diathermy-in-rehabilitative-medicine", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/electromyography-and-passive-filters-circuitry-in-action/", "id": "electromyography-and-passive-filters--circuitry-in-action", "title": "Electromyography and passive filters: Circuitry in action", "description": "Questions pertaining to electromyography and passive filters", "slug": "electromyography-and-passive-filters-circuitry-in-action", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/dermoscopy/", "id": "dermoscopy", "title": "Dermoscopy: Looking skin deep", "description": "Questions pertaining to\u00a0light and electromagnetic radiation", "slug": "dermoscopy", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/gamma-knife-radiosurgery/", "id": "gamma-knife-radiosurgery", "title": "Gamma knife radiosurgery", "description": "Questions pertaining to gamma knife radiosurgery", "slug": "gamma-knife-radiosurgery", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/axons-physics-and-chemistry-at-work-in-the-body/", "id": "axons--physics-and-chemistry-at-work-in-the-body", "title": "Axons: Physics and chemistry at work in the body", "description": "Questions pertaining to action potentials and myelin sheaths", "slug": "axons-physics-and-chemistry-at-work-in-the-body", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/proton-beam-therapy-particle-accelerators-in-medicine/", "id": "proton-beam-therapy--particle-accelerators-in-medicine", "title": "Proton beam therapy: Particle accelerators in medicine", "description": "Questions pertaining to proton beam therapy", "slug": "proton-beam-therapy-particle-accelerators-in-medicine", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut/a-physical-model-of-human-sitting/", "id": "a-physical-model-of-human-sitting", "title": "A physical model of human sitting", "description": "Questions pertaining to equilibrium and translational motion", "slug": "a-physical-model-of-human-sitting", "kind": "Exercise"}], "in_knowledge_map": false, "description": "These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/by-nc-sa/3.0/us/).", "node_slug": "physical-sciences-practice-tut", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut", "extended_slug": "test-prep/mcat/physical-sciences-practice/physical-sciences-practice-tut", "kind": "Topic", "slug": "physical-sciences-practice-tut"}], "in_knowledge_map": false, "description": "Go ahead and practice some passage-based questions!", "node_slug": "physical-sciences-practice", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/physical-sciences-practice", "extended_slug": "test-prep/mcat/physical-sciences-practice", "kind": "Topic", "slug": "physical-sciences-practice"}, {"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/test-prep/mcat/social-sciences-practice/", "id": "social-sciences-practice", "hide": false, "title": "Psychological, Social, and Biological Foundations of Behaviors Passages", "child_data": [{"kind": "Topic", "id": "x76558c11"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/", "id": "social-science-practice-tut", "hide": false, "title": "Social sciences practice passage questions", "child_data": [{"kind": "Exercise", "id": "xd44a8687"}, {"kind": "Exercise", "id": "xb452036c"}, {"kind": "Exercise", "id": "x028efd0d"}, {"kind": "Exercise", "id": "xcc0f99ef"}, {"kind": "Exercise", "id": "x3740b605"}, {"kind": "Exercise", "id": "x68f89305"}, {"kind": "Exercise", "id": "x7acdd5d7"}, {"kind": "Exercise", "id": "x4d52a1f2"}, {"kind": "Exercise", "id": "x3802bf6e"}, {"kind": "Exercise", "id": "xe2a6f461"}, {"kind": "Exercise", "id": "x6eb8054d"}, {"kind": "Exercise", "id": "x1b6a10dc"}, {"kind": "Exercise", "id": "xadf14012"}, {"kind": "Exercise", "id": "x50f1f825"}, {"kind": "Exercise", "id": "x8e195116"}, {"kind": "Exercise", "id": "xf53cacf2"}, {"kind": "Exercise", "id": "x6d56cd02"}, {"kind": "Exercise", "id": "xa8731860"}, {"kind": "Exercise", "id": "xe900c36a"}, {"kind": "Exercise", "id": "x0ad18054"}, {"kind": "Exercise", "id": "x523ff72c"}, {"kind": "Exercise", "id": "x1e6ae437"}, {"kind": "Exercise", "id": "xd175589e"}, {"kind": "Exercise", "id": "x1c6ef715"}, {"kind": "Exercise", "id": "x70df3d16"}, {"kind": "Exercise", "id": "xfa0cec1f"}, {"kind": "Exercise", "id": "xcb03ccde"}, {"kind": "Exercise", "id": "xdcf23b80"}, {"kind": "Exercise", "id": "xbc1b454a"}, {"kind": "Exercise", "id": "x0f0a4fbf"}, {"kind": "Exercise", "id": "xe47a3693"}, {"kind": "Exercise", "id": "xc4328f04"}, {"kind": "Exercise", "id": "x5219de59"}, {"kind": "Exercise", "id": "x6f6c333e"}, {"kind": "Exercise", "id": "x5d75dc57"}, {"kind": "Exercise", "id": "x73f30167"}, {"kind": "Exercise", "id": "x7d5c1ebf"}, {"kind": "Exercise", "id": "xfbb75a1c"}, {"kind": "Exercise", "id": "xc4b38381"}, {"kind": "Exercise", "id": "x43e672d7"}, {"kind": "Exercise", "id": "xc270f8d3"}, {"kind": "Exercise", "id": "x2b4d76ff"}, {"kind": "Exercise", "id": "xe08c9677"}, {"kind": "Exercise", "id": "x434aa25f"}, {"kind": "Exercise", "id": "x8d22a3f2"}, {"kind": "Exercise", "id": "x34cba46a"}, {"kind": "Exercise", "id": "xb4a5b171"}, {"kind": "Exercise", "id": "x5aaa1cbf"}, {"kind": "Exercise", "id": "xa067c91b"}, {"kind": "Exercise", "id": "xc5126ffd"}, {"kind": "Exercise", "id": "x8b85ca5a"}, {"kind": "Exercise", "id": "xb9e544e4"}, {"kind": "Exercise", "id": "x594c5520"}, {"kind": "Exercise", "id": "x6d46bba3"}, {"kind": "Exercise", "id": "x921a5db9"}, {"kind": "Exercise", "id": "xda08fdfc"}, {"kind": "Exercise", "id": "x1ed700e5"}, {"kind": "Exercise", "id": "x62d41255"}, {"kind": "Exercise", "id": "xaf53ebfe"}, {"kind": "Exercise", "id": "xa0d2342d"}, {"kind": "Exercise", "id": "xf1f41d49"}, {"kind": "Exercise", "id": "x10335537"}, {"kind": "Exercise", "id": "x8abc2290"}, {"kind": "Exercise", "id": "x73a6b672"}, {"kind": "Exercise", "id": "xd53ad0de"}, {"kind": "Exercise", "id": "xf52a6bc0"}, {"kind": "Exercise", "id": "xc449805e"}, {"kind": "Exercise", "id": "x1723b51d"}, {"kind": "Exercise", "id": "x57ab2232"}, {"kind": "Exercise", "id": "x615b03d6"}, {"kind": "Exercise", "id": "xb60443ea"}, {"kind": "Exercise", "id": "x157051d5"}, {"kind": "Exercise", "id": "xb7862fc5"}, {"kind": "Exercise", "id": "xbd417859"}, {"kind": "Exercise", "id": "x596c4c95"}, {"kind": "Exercise", "id": "xd749cf9f"}, {"kind": "Exercise", "id": "xc0d21dab"}, {"kind": "Exercise", "id": "x3034bcb7"}, {"kind": "Exercise", "id": "x00d77845"}, {"kind": "Exercise", "id": "x05812683"}, {"kind": "Exercise", "id": "xf2834c2a"}, {"kind": "Exercise", "id": "xb25b8a53"}, {"kind": "Exercise", "id": "x7ed06f06"}, {"kind": "Exercise", "id": "xb62a1f33"}, {"kind": "Exercise", "id": "x94c93ca7"}, {"kind": "Exercise", "id": "xb04063d9"}, {"kind": "Exercise", "id": "xfd135917"}, {"kind": "Exercise", "id": "x3235165f"}, {"kind": "Exercise", "id": "x170cb687"}, {"kind": "Exercise", "id": "xa68c305d"}, {"kind": "Exercise", "id": "x11d62e5c"}, {"kind": "Exercise", "id": "xe9ac79ca"}, {"kind": "Exercise", "id": "x88f6f904"}, {"kind": "Exercise", "id": "x56da6c30"}, {"kind": "Exercise", "id": "x898341ea"}, {"kind": "Exercise", "id": "xb0d379c8"}], "children": [{"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/is-obesity-contagious-/", "id": "is-obesity-contagious-", "title": "Is obesity contagious?", "description": "Questions related to social interactions and health outcomes.", "slug": "is-obesity-contagious-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/race-socioeconomic-status-and-nutrition/", "id": "race--socioeconomic-status--and-nutrition", "title": "Race, socioeconomic status, and nutrition", "slug": "race-socioeconomic-status-and-nutrition", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/romantic-and-sexual-networks-of-adolescents/", "id": "romantic-and-sexual-networks-of-adolescents", "title": "Romantic and sexual networks of adolescents", "description": "Questions related to social networks and disease diffusion", "slug": "romantic-and-sexual-networks-of-adolescents", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/marijuana-usage-as-social-behavior/", "id": "marijuana-usage-as-social-behavior", "title": "Marijuana usage as social behavior", "description": "Questions related to social aspects of drug usage.", "slug": "marijuana-usage-as-social-behavior", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/why-do-we-believe-that-there-are-universal-emotions-/", "id": "why-do-we-believe-that-there-are-universal-emotions-", "title": "Why do we believe that there are universal emotions?", "description": "Questions related to the universal emotions.", "slug": "why-do-we-believe-that-there-are-universal-emotions-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/applications-of-operant-conditioning-in-daily-life/", "id": "applications-of-operant-conditioning-in-daily-life", "title": "Applications of operant conditioning in daily life", "description": "Questions related to operant conditioning", "slug": "applications-of-operant-conditioning-in-daily-life", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/miller-s-law-chunking-and-the-capacity-of-working-memory/", "id": "miller-s-law--chunking--and-the-capacity-of-working-memory", "title": "Miller\u2019s law, chunking, and the capacity of working memory", "description": "Questions related to memory", "slug": "miller-s-law-chunking-and-the-capacity-of-working-memory", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/prosopagnosia-you-seem-familiar-but-i-can-t-place-your-face-/", "id": "prosopagnosia----you-seem-familiar--but-i-can-t-place-your-face--", "title": "Prosopagnosia - \u201cYou seem familiar, but I can\u2019t place your face\u201d", "description": "Questions relating to vision", "slug": "prosopagnosia-you-seem-familiar-but-i-can-t-place-your-face-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/somatosensory-effects-of-temple-grandin-s-squeeze-box-on-hypersensitivity-/", "id": "somatosensory-effects-of-temple-grandin-s-squeeze-box-on-hypersensitivity-", "title": "Somatosensory effects of Temple Grandin\u2019s squeeze box on hypersensitivity.", "description": "Questions relating to somatosensation", "slug": "somatosensory-effects-of-temple-grandin-s-squeeze-box-on-hypersensitivity-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/exploring-clinical-applications-of-classical-conditioning/", "id": "exploring-clinical-applications-of-classical-conditioning", "title": "Exploring clinical applications of classical conditioning", "description": "Questions related to classical conditioning", "slug": "exploring-clinical-applications-of-classical-conditioning", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/social-conflict-theory-in-an-historical-context/", "id": "social-conflict-theory-in-an-historical-context", "title": "Social conflict theory in an historical context", "description": "Questions related to social theories", "slug": "social-conflict-theory-in-an-historical-context", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/visual-pathways-in-the-brain-and-what-happens-when-they-break/", "id": "visual-pathways-in-the-brain--and-what-happens-when-they-break", "title": "Visual pathways in the brain, and what happens when they break", "description": "Questions related to sensory processing and vision", "slug": "visual-pathways-in-the-brain-and-what-happens-when-they-break", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/challenging-beliefs-to-prevent-eating-disorders-/", "id": "challenging-beliefs-to-prevent-eating-disorders-", "title": "Challenging beliefs to prevent eating disorders", "description": "Questions related to attitudes.", "slug": "challenging-beliefs-to-prevent-eating-disorders-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/do-beliefs-about-healthy-food-inform-consumer-choices-/", "id": "do-beliefs-about-healthy-food-inform-consumer-choices--", "title": "Do beliefs about healthy food inform consumer choices?", "description": "Questions related to attitudes", "slug": "do-beliefs-about-healthy-food-inform-consumer-choices-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/coping-with-cancer-novel-methods-of-stress-management/", "id": "coping-with-cancer--novel-methods-of-stress-management", "title": "Coping with cancer: novel methods of stress management", "description": "Questions related to stress", "slug": "coping-with-cancer-novel-methods-of-stress-management", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/clinical-vignette-of-an-adult-psychiatric-patient-/", "id": "clinical-vignette-of-an-adult-psychiatric-patient-", "title": "Clinical vignette of an adult psychiatric patient", "description": "Questions related to psychological disorders", "slug": "clinical-vignette-of-an-adult-psychiatric-patient-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/efficacy-of-cognitive-behavioral-therapy-for-social-anxiety-disorder/", "id": "efficacy-of-cognitive-behavioral-therapy-for-social-anxiety-disorder", "title": "Efficacy of cognitive behavioral therapy for social anxiety disorder", "description": "Questions related to psychological disorders", "slug": "efficacy-of-cognitive-behavioral-therapy-for-social-anxiety-disorder", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/case-study-of-panic-disorder-in-an-adult-female/", "id": "case-study-of-panic-disorder-in-an-adult-female", "title": "Case study of panic disorder in an adult female", "description": "Questions related to psychological disorders", "slug": "case-study-of-panic-disorder-in-an-adult-female", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/drug-addiction-treatments/", "id": "drug-addiction-treatments", "title": "Drug addiction treatment and relapse in incarcerated populations", "description": "Questions related to addiction and motivation", "slug": "drug-addiction-treatments", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/navigating-the-stages-of-sleep/", "id": "navigating-the-stages-of-sleep", "title": "Navigating the stages of sleep", "description": "Questions related to sleep stages", "slug": "navigating-the-stages-of-sleep", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/cocaine-addiction-in-mice/", "id": "cocaine-addiction-in-mice", "title": "Cocaine addiction in mice", "description": "This passage tests your knowledge on drug addiction treatments", "slug": "cocaine-addiction-in-mice", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/changes-in-empathy-throughout-medical-school-and-residency/", "id": "changes-in-empathy-throughout-medical-school-and-residency", "title": "Changes in empathy throughout medical school and residency", "description": "Questions related to personality.", "slug": "changes-in-empathy-throughout-medical-school-and-residency", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/big-five-personality-traits-and-health-behaviors/", "id": "big-five-personality-traits-and-health-behaviors", "title": "Big five personality traits and health behaviors", "description": "Questions related to personality", "slug": "big-five-personality-traits-and-health-behaviors", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/information-processing-and-the-discovery-of-iconic-memory/", "id": "information-processing-and-the-discovery-of-iconic-memory", "title": "Information processing and the discovery of iconic memory", "description": "Questions related to iconic memory", "slug": "information-processing-and-the-discovery-of-iconic-memory", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/sensory-perception-passage-1/", "id": "sensory-perception---passage-1", "title": "Gestalt principles and ratings of physical attractiveness", "description": "Questions related to perception", "slug": "sensory-perception-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/sensory-perception-passage-2/", "id": "sensory-perception---passage-2", "title": "Sensory adaptation and Weber's Law", "description": "Questions related to perception", "slug": "sensory-perception-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/sight-vision-passage-1/", "id": "sight--vision----passage-1", "title": "Feline night vision", "description": "Questions related to vision", "slug": "sight-vision-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/sight-vision-passage-2/", "id": "sight--vision----passage-2", "title": "Sight (vision) - Passage 2", "description": "Questions related to vision", "slug": "sight-vision-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/sound-audition-passage-1/", "id": "sound--audition----passage-1", "title": "Differential effectiveness of cochlear implants", "description": "Questions related to hearing", "slug": "sound-audition-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/sound-audition-passage-2/", "id": "sound--audition----passage-2", "title": "Functions of the basilar membrane", "description": "Questions related to audition", "slug": "sound-audition-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/somatosensation-passage-1/", "id": "somatosensation---passage-1", "title": "Phantom limb pain among veterans", "description": "Questions related to somatosensation", "slug": "somatosensation-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/somatosensation-passage-2/", "id": "somatosensation---passage-2", "title": "Congenital analgesia", "description": "Questions related to somatosensation", "slug": "somatosensation-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/taste-gustation-and-smell-olfaction-passage-1/", "id": "taste--gustation--and-smell--olfaction----passage-1", "title": "Diminished sensory input and the enjoyment of food", "slug": "taste-gustation-and-smell-olfaction-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/taste-gustation-and-smell-olfaction-passage-2/", "id": "taste--gustation--and-smell--olfaction----passage-2", "title": "Taste disorders and their causes", "description": "Questions related to gustation and olfaction", "slug": "taste-gustation-and-smell-olfaction-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/cognition-passage-1/", "id": "cognition---passage-1", "title": "Matchboxes and problem solving", "slug": "cognition-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/cognition-passage-2/", "id": "cognition---passage-2", "title": "Identifying intelligence types to increase student success", "slug": "cognition-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/attention-and-language-passage-1/", "id": "attention-and-language---passage-1", "title": "Linguistic patterns of English and Navajo speakers", "slug": "attention-and-language-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/attention-and-language-passage-2/", "id": "attention-and-language---passage-2", "title": "Language deficits and traumatic brain injury", "slug": "attention-and-language-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/sleep-and-consciousness-passage-1/", "id": "sleep-and-consciousness---passage-1", "title": "Effects of sleep deprivation on memory", "slug": "sleep-and-consciousness-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/sleep-and-consciousness-passage-2/", "id": "sleep-and-consciousness---passage-2", "title": "Observing patients in a sleep clinic", "slug": "sleep-and-consciousness-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/memory-passage-1/", "id": "memory---passage-1", "title": "Differential memory loss and Alzheimer's Disease", "slug": "memory-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/memory-passage-2/", "id": "memory---passage-2", "title": "Remembering folk tales over time", "slug": "memory-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/emotion-passage-1/", "id": "emotion---passage-1", "title": "Responses to emotion induction", "slug": "emotion-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/emotion-passage-2/", "id": "emotion---passage-2", "title": "Positive emotion and emotional eating", "slug": "emotion-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/stress-passage-1/", "id": "stress---passage-1", "title": "Stress, coping, and surgical error", "description": "Stress - Passage 1", "slug": "stress-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/stress-passage-2/", "id": "stress---passage-2", "title": "PTSD and apoptosis", "description": "Stress - Passage 2", "slug": "stress-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/behavior-and-genetics-passage-1/", "id": "behavior-and-genetics---passage-1", "title": "How similar are the personalities of twins?", "slug": "behavior-and-genetics-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/behavior-and-genetics-passage-2/", "id": "behavior-and-genetics---passage-2", "title": "Exploring an individual's temperament", "slug": "behavior-and-genetics-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/biological-basis-of-behavior-nervous-system-passage-1/", "id": "biological-basis-of-behavior--nervous-system-passage---1", "title": "A virus which affects mouse muscles", "description": "Biological basis of behavior: nervous system Passage - 1", "slug": "biological-basis-of-behavior-nervous-system-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/biological-basis-of-behavior-nervous-system-passage-2/", "id": "biological-basis-of-behavior--nervous-system-passage---2", "title": "Diabetic peripheral neuropathy, pain, and acupuncture", "description": "Questions related to the biological basis of behavior", "slug": "biological-basis-of-behavior-nervous-system-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/biological-basis-of-behavior-endocrine-system/", "id": "biological-basis-of-behavior---endocrine-system", "title": "Stress responses and the endocrine system", "slug": "biological-basis-of-behavior-endocrine-system", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/biological-basis-of-behavior-passage-2/", "id": "biological-basis-of-behavior---passage-2", "title": "Effects of insulin deficiency", "slug": "biological-basis-of-behavior-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/theories-of-personality-passage-1/", "id": "theories-of-personality---passage-1", "title": "Antisocial personality disorder and inkblot tests", "slug": "theories-of-personality-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/theories-of-personality/", "id": "theories-of-personality", "title": "Freudian psychotherapy", "slug": "theories-of-personality", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/motivations-and-attitudes-passage-1/", "id": "motivations-and-attitudes---passage-1", "title": "Physiological needs and pregnancy", "slug": "motivations-and-attitudes-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/motivations-and-attitudes-passage-2/", "id": "motivations-and-attitudes---passage-2", "title": "Smoking cessation and behavioral change", "slug": "motivations-and-attitudes-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/social-psychology-passage-1/", "id": "social-psychology---passage-1", "title": "Group dynamics in a graduate school classroom", "slug": "social-psychology-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/social-psychology-passage-2/", "id": "social-psychology---passage-2", "title": "Dietary restriction and sorority dynamics", "slug": "social-psychology-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/normative-and-non-normative-behavior-passage-1/", "id": "normative-and-non-normative-behavior---passage-1", "title": "Marriage and family preferences", "description": "Questions related to marriage and family preferences", "slug": "normative-and-non-normative-behavior-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/normative-and-non-normative-behavior-passage-2/", "id": "normative-and-non-normative-behavior---passage-2", "title": "Marriage and family", "description": "Questions related to marriage and family", "slug": "normative-and-non-normative-behavior-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/learning-passage-1/", "id": "learning---passage-1", "title": "Cigarette use in teen populations", "slug": "learning-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/learning-passage-2/", "id": "learning---passage-2", "title": "Video game usage and aggressive behavior", "slug": "learning-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/self-identity-passage-1/", "id": "self-identity---passage-1", "title": "Alternative education models and child development", "slug": "self-identity-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/self-identity-passage-2/", "id": "self-identity---passage-2", "title": "Increasing Sarah's self-efficacy: A case study", "slug": "self-identity-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/social-structures-passage-1/", "id": "social-structures---passage-1", "title": "Urban growth models", "description": "Questions related to urbanization and urban growth", "slug": "social-structures-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/social-structures-passage-2/", "id": "social-structures---passage-2", "title": "Social norms and deviant behavior", "description": "Questions related to social norms and deviant behavior.", "slug": "social-structures-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/demographics-passage-1/", "id": "demographics---passage-1", "title": "Population growth and immigration", "description": "Questions related to population growth and immigration", "slug": "demographics-passage-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/demographics-passage-2/", "id": "demographics---passage-2", "title": "The J-curve hypothesis", "slug": "demographics-passage-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/fertility-rates-and-demographic-change/", "id": "fertility-rates-and-demographic-change", "title": "Fertility rates and demographic change", "description": "Questions related to fertility rates and demographic change.", "slug": "fertility-rates-and-demographic-change", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/socioeconomic-status-and-mental-illnesses/", "id": "socioeconomic-status-and-mental-illnesses", "title": "Socioeconomic status and mental illnesses", "description": "Questions related to socioeconomic status and mental illnesses.", "slug": "socioeconomic-status-and-mental-illnesses", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/are-suicidal-behaviors-contagious-in-adolescence-/", "id": "are-suicidal-behaviors--contagious--in-adolescence-", "title": "Are suicidal behaviors \"contagious\" in adolescence?", "description": "Questions related to teens and suicidal behavior.", "slug": "are-suicidal-behaviors-contagious-in-adolescence-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/what-are-your-chances-of-getting-divorced-/", "id": "what-are-your-chances-of-getting-divorced-", "title": "What are your chances of getting divorced?", "description": "Questions related to marital disruption.", "slug": "what-are-your-chances-of-getting-divorced-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/malthusian-population-growth-and-population-pyramids/", "id": "malthusian-population-growth-and-population-pyramids", "title": "Malthusian population growth and population pyramids", "description": "Questions related to population growth", "slug": "malthusian-population-growth-and-population-pyramids", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/disparities-in-healthcare-access/", "id": "disparities-in-healthcare-access", "title": "Disparities in healthcare access", "description": "Questions related to healthcare disparities.", "slug": "disparities-in-healthcare-access", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/ocd-and-hoarding-disorder/", "id": "ocd-and-hoarding-disorder", "title": "OCD and hoarding disorder", "description": "Questions related to psychological disorders", "slug": "ocd-and-hoarding-disorder", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/clinical-vignette-of-persistent-depressive-disorder/", "id": "clinical-vignette-of-persistent-depressive-disorder", "title": "Clinical vignette of persistent depressive disorder", "description": "Questions related to psychological disorders", "slug": "clinical-vignette-of-persistent-depressive-disorder", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/gender-differences-in-symptoms-of-major-depressive-disorder-/", "id": "gender-differences-in-symptoms-of-major-depressive-disorder-", "title": "Gender differences in symptoms of major depressive disorder", "description": "Questions related to psychological disorders", "slug": "gender-differences-in-symptoms-of-major-depressive-disorder-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/health-after-trauma-correlates-of-ptsd/", "id": "health-after-trauma--correlates-of-ptsd", "title": "Health after trauma- correlates of PTSD", "description": "Questions related to psychological disorders", "slug": "health-after-trauma-correlates-of-ptsd", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/demographic-disparities-in-food-resources/", "id": "demographic-disparities-in-food-resources", "title": "Demographic disparities in food resources", "description": "Demographic disparities in food resources", "slug": "demographic-disparities-in-food-resources", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/socioeconomic-gradients-in-health/", "id": "socioeconomic-gradients-in-health", "title": "Socioeconomic gradients in health", "description": "Socioeconomic gradients in health", "slug": "socioeconomic-gradients-in-health", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/to-cohabit-or-not-to-cohabit-/", "id": "to-cohabit-or-not-to-cohabit-", "title": "To cohabit or not to cohabit?", "description": "To cohabit or not to cohabit?", "slug": "to-cohabit-or-not-to-cohabit-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/educational-attainment-income-and-psychiatric-disorders/", "id": "educational-attainment--income--and-psychiatric-disorders", "title": "Educational attainment, income, and psychiatric disorders", "description": "Educational attainment, income, and psychiatric disorders", "slug": "educational-attainment-income-and-psychiatric-disorders", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/theories-of-language-acquisition/", "id": "theories-of-language-acquisition", "title": "Theories of language acquisition", "description": "Theories of Language Acquisition", "slug": "theories-of-language-acquisition", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/physiological-stress-response-to-cuss-words-/", "id": "physiological-stress-response-to-cuss-words-", "title": "Physiological stress response to cuss words?", "description": "Physiological stress response to cuss words?", "slug": "physiological-stress-response-to-cuss-words-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/tickle-me-nim-do-primates-speak-language-/", "id": "tickle-me-nim--do-primates-speak-language-", "title": "Tickle me Nim. Do primates speak language?", "description": "Tickle me Nim. Do primates speak language?", "slug": "tickle-me-nim-do-primates-speak-language-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/classical-and-operant-conditioning/", "id": "classical-and-operant-conditioning", "title": "Cats and dogs and conditioning", "description": "Cats and Dogs and Conditioning", "slug": "classical-and-operant-conditioning", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/can-tickling-help-us-understand-some-symptoms-of-schizophrenia-/", "id": "can-tickling-help-us-understand-some-symptoms-of-schizophrenia-", "title": "Can tickling help us understand some symptoms of schizophrenia?", "description": "Can tickling help us understand some symptoms of schizophrenia?", "slug": "can-tickling-help-us-understand-some-symptoms-of-schizophrenia-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/reciprocal-altruism-vampire-bats-and-relatedness/", "id": "reciprocal-altruism--vampire-bats--and-relatedness", "title": "Reciprocal altruism, vampire bats, and relatedness", "description": "Reciprocal altruism, vampire bats, and relatedness", "slug": "reciprocal-altruism-vampire-bats-and-relatedness", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/structure-of-the-central-nervous-system/", "id": "structure-of-the-central-nervous-system", "title": "Structure of the central nervous system", "description": "Structure of the Central Nervous System", "slug": "structure-of-the-central-nervous-system", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/spinal-nerves-and-guillain-barre-syndrome/", "id": "spinal-nerves-and-guillain-barre-syndrome", "title": "Spinal nerves and Guillain-Barre syndrome", "description": "Spinal nerves and Guillain-Barre syndrome", "slug": "spinal-nerves-and-guillain-barre-syndrome", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/simultaneous-hermaphroditism-egg-trading-and-the-prisoner-s-dilemma/", "id": "simultaneous-hermaphroditism--egg-trading--and-the-prisoner-s-dilemma", "title": "Simultaneous hermaphroditism, egg trading, and the Prisoner\u2019s Dilemma", "description": "Simultaneous hermaphroditism, egg trading, and the Prisoner\u2019s Dilemma", "slug": "simultaneous-hermaphroditism-egg-trading-and-the-prisoner-s-dilemma", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/language-location-in-the-brain-asl/", "id": "language-location-in-the-brain---asl", "title": "Language location in the brain - ASL", "description": "Language location in the brain - ASL", "slug": "language-location-in-the-brain-asl", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/embodied-cognition-hockey-does-expertise-impact-text-understanding-/", "id": "embodied-cognition--hockey--does-expertise-impact-text-understanding-", "title": "Embodied cognition, hockey, does expertise impact text understanding?", "description": "Questions pertaining to cognition", "slug": "embodied-cognition-hockey-does-expertise-impact-text-understanding-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/driving-and-talking-on-a-cell-phone/", "id": "driving-and-talking-on-a-cell-phone", "title": "Driving and talking on a cell phone", "slug": "driving-and-talking-on-a-cell-phone", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/counting-systems-and-the-piraha-tribe-/", "id": "counting-systems-and-the-piraha-tribe-", "title": "Counting systems and the Pirah\u00e3 tribe", "slug": "counting-systems-and-the-piraha-tribe-", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-sciences-practice/social-science-practice-tut/perky-effect/", "id": "perky-effect", "title": "Perky effect", "description": "Questions pertaining to sensing the environment", "slug": "perky-effect", "kind": "Exercise"}], "in_knowledge_map": false, "description": "These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/by-nc-sa/3.0/us/).", "node_slug": "social-science-practice-tut", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/social-sciences-practice/social-science-practice-tut", "extended_slug": "test-prep/mcat/social-sciences-practice/social-science-practice-tut", "kind": "Topic", "slug": "social-science-practice-tut"}], "in_knowledge_map": false, "description": "Go ahead and practice some passage-based questions!", "node_slug": "social-sciences-practice", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/social-sciences-practice", "extended_slug": "test-prep/mcat/social-sciences-practice", "kind": "Topic", "slug": "social-sciences-practice"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/", "id": "biomolecules", "hide": false, "title": "Biomolecules", "child_data": [{"kind": "Topic", "id": "x47a34eeb"}, {"kind": "Topic", "id": "x7329c2c4"}, {"kind": "Topic", "id": "x0951f061"}, {"kind": "Topic", "id": "x51e920cd"}, {"kind": "Topic", "id": "x5a58e875"}, {"kind": "Topic", "id": "x5f5a3cc0"}, {"kind": "Topic", "id": "x1455c62c"}, {"kind": "Topic", "id": "xcae3cc4c"}, {"kind": "Topic", "id": "x7115ab3d"}, {"kind": "Topic", "id": "xba69ad9f"}, {"kind": "Topic", "id": "x89a1d0ed"}, {"kind": "Topic", "id": "x861d6464"}, {"kind": "Topic", "id": "xd2b14135"}, {"kind": "Topic", "id": "x2701e1e7"}, {"kind": "Topic", "id": "xb0c4c545"}, {"kind": "Topic", "id": "x20d41ec0"}, {"kind": "Topic", "id": "xe230a065"}, {"kind": "Topic", "id": "x86028831"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/", "id": "amino-acids-and-proteins1", "hide": false, "title": "Amino acids and proteins", "child_data": [{"kind": "Exercise", "id": "xb443b8a3"}, {"kind": "Video", "id": "x26d6c1bf"}, {"kind": "Video", "id": "x2958f130"}, {"kind": "Article", "id": "x538a73df"}, {"kind": "Video", "id": "xcabbce1c"}, {"kind": "Video", "id": "xd30895ea"}, {"kind": "Video", "id": "x65a0c725"}, {"kind": "Video", "id": "x3639c4fb"}, {"kind": "Video", "id": "xa5d86a39"}, {"kind": "Video", "id": "xebba8bf7"}, {"kind": "Video", "id": "xaff1b54c"}, {"kind": "Article", "id": "x8766a11e"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/amino-acids-and-proteins-questions/", "id": "amino-acids-and-proteins-questions", "title": "Amino acids and proteins questions", "description": "Amino acids and proteins questions", "slug": "amino-acids-and-proteins-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/central-dogma-of-molecular-biology-2/", "id": "KIvBn6gfRgY", "title": "Central dogma of molecular biology", "kind": "Video", "slug": "central-dogma-of-molecular-biology-2"}, {"path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/central-dogma-revisited/", "id": "Yv94eGD7cUU", "title": "Central dogma - revisited", "kind": "Video", "description": "New discoveries have expanded on or even contradicted the original Central dogma of molecular biology as proposed by Watson and Crick. These discoveries include multiple alternate pathways of the molecules as well as different types of RNA that you'll need to know. By Tracy Kovach.", "slug": "central-dogma-revisited"}, {"path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/peptide-bond-formation-and-cleavage/", "id": "pmQuNRHJMw4", "title": "Peptide bonds: Formation and cleavage", "kind": "Video", "description": "Peptide bonds are formed when the amine group of one amino acid binds with the carbonyl carbon of another amino acid. We will learn more about peptide bonds and how the cleaving process occurs. \u00a0By Tracy Kovach.", "slug": "peptide-bond-formation-and-cleavage"}, {"path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/special-cases-histidine-proline-glycine-cysteine/", "id": "2_IJz1ivopQ", "title": "Special cases: Histidine, proline, glycine, cysteine", "kind": "Video", "description": "Certain amino acids stand out for their unique properties. In this video, you'll learn more about what makes histidine, proline, glycine, and cysteine unique.\u00a0 By Tracy Kovach.", "slug": "special-cases-histidine-proline-glycine-cysteine"}, {"path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/amino-acid-structure/", "id": "BbZB-WBVFSk", "title": "Amino acid structure", "kind": "Video", "description": "In this video, you'll learn about the general structure of amino acids, which include an amine group, a carboxylic acid group, and a unique side chain (R-group) attached to the alpha carbon. In addition, we'll explore where amino acids fit in terms of biological metabolism. By Tracy Kovach.", "slug": "amino-acid-structure"}, {"path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/isoelectric-point-and-zwitterions/", "id": "42llTiRn-b8", "title": "Isoelectric point and zwitterions", "kind": "Video", "description": "The isoelectric point of an amino acid is the pH at which the amino acid has a neutral charge. You will learn how to calculate the isoelectric point, and the effects of pH on the amino acid's overall charge. We will also discuss zwitterions, or the forms of amino acids that dominate at the isoelectric point. By Tracy Kovach.", "slug": "isoelectric-point-and-zwitterions"}, {"path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/classification-amino-acids/", "id": "OPAvXQsPCqQ", "title": "Classification of amino acids", "kind": "Video", "description": "Amino acids can be classified according to their side chain's chemical properties (the R-group). This video will show you how! By Tracy Kovach.", "slug": "classification-amino-acids"}, {"path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/four-levels-of-protein-structure/", "id": "O5gN-IK6uKs", "title": "Four levels of protein structure", "kind": "Video", "description": "The four levels of protein structure are primary, secondary, tertiary, and quaternary. It is helpful to understand the nature and function of each level of protein structure in order to fully understand how a protein works. \u00a0By Tracy Kovach.", "slug": "four-levels-of-protein-structure"}, {"path": "khan/test-prep/mcat/biomolecules/amino-acids-and-proteins1/conformational-stability-protein-folding-and-denaturation/", "id": "dNHtdiVjQbM", "title": "Conformational stability: Protein folding and denaturation", "kind": "Video", "description": "Different bonds/interactions contribute to the stability of each level of protein structure. Let's explore some common ones such as peptide bonds, hydrogen bonds, and disulfide bonds. By Tracy Kovach.", "slug": "conformational-stability-protein-folding-and-denaturation"}], "in_knowledge_map": false, "description": "1A: We will come to an understanding of the central dogma of molecular biology: DNA makes RNA, and RNA makes protein. You will learn about how we classify the different amino acids and how they come together to form the building blocks of complex proteins.", "node_slug": "amino-acids-and-proteins1", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/amino-acids-and-proteins1", "extended_slug": "test-prep/mcat/biomolecules/amino-acids-and-proteins1", "kind": "Topic", "slug": "amino-acids-and-proteins1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/enzyme-structure-and-function/", "id": "enzyme-structure-and-function", "hide": false, "title": "Enzyme structure and function", "child_data": [{"kind": "Exercise", "id": "x7bd7bac5"}, {"kind": "Article", "id": "xfed803ca"}, {"kind": "Video", "id": "xcf1aa38a"}, {"kind": "Video", "id": "x7af3f4fb"}, {"kind": "Video", "id": "x8b5ec2a3"}, {"kind": "Video", "id": "x22f8074c"}, {"kind": "Video", "id": "x24388d68"}, {"kind": "Video", "id": "x4da6e810"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/enzyme-structure-and-function/enzyme-structure-and-function-questions/", "id": "enzyme-structure-and-function-questions", "title": "Enzyme structure and function questions", "description": "Questions pertaining to enzyme structure and function", "slug": "enzyme-structure-and-function-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-structure-and-function/an-introduction-to-enzymes-and-catalysis/", "id": "G7ZAwUdBNFE", "title": "Introduction to enzymes and catalysis", "kind": "Video", "description": "Let's explore what enzymes are, and how they can affect a reaction. The most important affect you need to know is its ability to \"catalyze\" the reaction.\u00a0By Ross Firestone.", "slug": "an-introduction-to-enzymes-and-catalysis"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-structure-and-function/enzymes-and-activation-energy/", "id": "j00Ep0Byu0Y", "title": "Enzymes and activation energy", "kind": "Video", "description": "Explore the role of enzymes in making a reaction more likely to happen quickly. By Ross Firestone.", "slug": "enzymes-and-activation-energy"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-structure-and-function/the-induced-fit-model-of-enzyme-catalysis/", "id": "8lUB2sAQkzw", "title": "Induced fit model of enzyme catalysis", "kind": "Video", "description": "Get a better appreciation for how enzymes and substrates bind together. By Ross Firestone.", "slug": "the-induced-fit-model-of-enzyme-catalysis"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-structure-and-function/the-six-types-of-enzymes/", "id": "AD3-v1oKjSk", "title": "Six types of enzymes", "kind": "Video", "description": "Enzymes are often named for their reactions, and you can often discern the function of an enzyme from its name. We will learn about six types of enzymes based on the type of reaction they catalyze.\u00a0By Ross Firestone.", "slug": "the-six-types-of-enzymes"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-structure-and-function/cofactors-coenzymes-and-vitamins/", "id": "OJhdag89Pq4", "title": "Co-factors, co-enzymes, and vitamins", "kind": "Video", "description": "Co-factors and co-enzymes assist enzymes in their function. We will learn what both co-enzymes and co-factors are, and how they might affect the catalysis of a reaction.\u00a0By Ross Firestone.", "slug": "cofactors-coenzymes-and-vitamins"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-structure-and-function/enzymes-and-their-local-environment/", "id": "LC5I8BsO18I", "title": "Enzymes and their local environment", "kind": "Video", "description": "In this video, we'll learn how different environments might affect an enzyme's function. Important environmental factors include pH and temperature.\u00a0By Ross Firestone.", "slug": "enzymes-and-their-local-environment"}], "in_knowledge_map": false, "description": "1A: The multitude of reactions within our cells are sped up by enzymes. Without these biomolecules, these biochemical pathways would be as slow as a turtle. For instance, without enzymes, your body may never be able to break down and absorb the hamburger you just had for lunch. The hamburger would simply sit there, a lump in your stomach, until reactions slowly started to happen on their own - enzymes speed that up!", "node_slug": "enzyme-structure-and-function", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/enzyme-structure-and-function", "extended_slug": "test-prep/mcat/biomolecules/enzyme-structure-and-function", "kind": "Topic", "slug": "enzyme-structure-and-function"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/", "id": "enzyme-kinetics", "hide": false, "title": "Enzyme kinetics", "child_data": [{"kind": "Exercise", "id": "x48834e4d"}, {"kind": "Video", "id": "x463bb2f6"}, {"kind": "Video", "id": "x0fa2bed6"}, {"kind": "Video", "id": "x62c3f19d"}, {"kind": "Video", "id": "x694f3983"}, {"kind": "Video", "id": "xd3a7e1dc"}, {"kind": "Video", "id": "xe819d5b4"}, {"kind": "Video", "id": "xfa409d6b"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/enzyme-kinetics-questions/", "id": "enzyme-kinetics-questions", "title": "Enzyme kinetics questions", "description": "Enzyme kinetics questions", "slug": "enzyme-kinetics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/an-introduction-to-enzyme-kinetics/", "id": "X_YXTWU2maY", "title": "An introduction to enzyme kinetics", "kind": "Video", "slug": "an-introduction-to-enzyme-kinetics"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/steady-states-and-the-michaelis-menten-equation/", "id": "7u2MkbsE_dw", "title": "Steady states and the Michaelis Menten equation", "kind": "Video", "slug": "steady-states-and-the-michaelis-menten-equation"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/enzymatic-inhibition-and-lineweaver-burke-plots/", "id": "ALU24yhKJZw", "title": "Enzymatic inhibition and Lineweaver Burke plots", "kind": "Video", "slug": "enzymatic-inhibition-and-lineweaver-burke-plots"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/cooperativity/", "id": "5xp9lI_fXDo", "title": "Cooperativity", "kind": "Video", "slug": "cooperativity"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/allosteric-regulation-and-feedback-loops/", "id": "UWrJssS76XE", "title": "Allosteric regulation and feedback loops", "kind": "Video", "slug": "allosteric-regulation-and-feedback-loops"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/non-enzymatic-protein-function/", "id": "eVmLvbB6L18", "title": "Non-enzymatic protein function", "kind": "Video", "slug": "non-enzymatic-protein-function"}, {"path": "khan/test-prep/mcat/biomolecules/enzyme-kinetics/covalent-modifications-to-enzymes/", "id": "yqwnRekNLg4", "title": "Covalent modifications to enzymes", "kind": "Video", "slug": "covalent-modifications-to-enzymes"}], "in_knowledge_map": false, "description": "1A: You\u2019ll come to understand how enzymes, biomolecular catalysts, speed up reactions in cells as well as interact with one another. With just a little algebra, we\u2019ll come to a mathematical understanding of this fundamental process.", "node_slug": "enzyme-kinetics", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/enzyme-kinetics", "extended_slug": "test-prep/mcat/biomolecules/enzyme-kinetics", "kind": "Topic", "slug": "enzyme-kinetics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/dna/", "id": "dna", "hide": false, "title": "DNA", "child_data": [{"kind": "Exercise", "id": "x5477c0b3"}, {"kind": "Article", "id": "x97f0540d"}, {"kind": "Video", "id": "x2fb5e8b8"}, {"kind": "Video", "id": "x01e0c840"}, {"kind": "Video", "id": "xaf847fc3"}, {"kind": "Video", "id": "xcdf631f4"}, {"kind": "Video", "id": "xfdccdb45"}, {"kind": "Video", "id": "x22ba215e"}, {"kind": "Video", "id": "xcdf04adf"}, {"kind": "Video", "id": "x30083057"}, {"kind": "Video", "id": "xc9358f89"}, {"kind": "Video", "id": "x71aaee42"}, {"kind": "Video", "id": "x43ca37f1"}, {"kind": "Video", "id": "xfee29e2b"}, {"kind": "Video", "id": "x28d92c9b"}, {"kind": "Video", "id": "x61ed11c4"}, {"kind": "Video", "id": "x0b4ccf48"}, {"kind": "Video", "id": "x62a965e4"}, {"kind": "Article", "id": "x1a946bc0"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/dna/dna-questions/", "id": "dna-questions", "title": "DNA questions", "description": "DNA questions", "slug": "dna-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/dna/nucleic-acid-structure-1/", "id": "NX0ZPtB_QFY", "title": "Nucleic acid structure 1", "kind": "Video", "slug": "nucleic-acid-structure-1"}, {"path": "khan/test-prep/mcat/biomolecules/dna/nucleic-acid-structure-2/", "id": "2-nCSLMGwhI", "title": "Nucleic acid structure 2", "kind": "Video", "slug": "nucleic-acid-structure-2"}, {"path": "khan/test-prep/mcat/biomolecules/dna/telomeres-and-single-copy-dna-vs-repetitive-dna/", "id": "cGrqnKiOUio", "title": "Telomeres and single copy DNA vs repetitive DNA", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "telomeres-and-single-copy-dna-vs-repetitive-dna"}, {"path": "khan/test-prep/mcat/biomolecules/dna/semi-conservative-replication/", "id": "jaJ3NlqK5dA", "title": "Semi conservative replication", "kind": "Video", "slug": "semi-conservative-replication"}, {"path": "khan/test-prep/mcat/biomolecules/dna/how-dna-is-replicated-1/", "id": "qIQmB5mkUgg", "title": "How DNA is replicated 1", "kind": "Video", "slug": "how-dna-is-replicated-1"}, {"path": "khan/test-prep/mcat/biomolecules/dna/how-dna-is-replicated-2/", "id": "trgXI-RCFJk", "title": "How DNA is replicated 2", "kind": "Video", "slug": "how-dna-is-replicated-2"}, {"path": "khan/test-prep/mcat/biomolecules/dna/transcription-1/", "id": "mQh5ku9dyJQ", "title": "Transcription 1", "kind": "Video", "slug": "transcription-1"}, {"path": "khan/test-prep/mcat/biomolecules/dna/transcription-2/", "id": "icUBgcwp8QE", "title": "Transcription 2", "kind": "Video", "slug": "transcription-2"}, {"path": "khan/test-prep/mcat/biomolecules/dna/the-genetic-code/", "id": "dijqYyFY1GM", "title": "The genetic code", "kind": "Video", "description": "How do nucleotides in RNA get translated into amino acids in a protein? The key is the genetic code, which shows the corresponding amino acid for each possible combination of three nucleotides (codon).", "slug": "the-genetic-code"}, {"path": "khan/test-prep/mcat/biomolecules/dna/protein-translation-1/", "id": "H6gtCQUhNGk", "title": "Protein translation 1", "kind": "Video", "slug": "protein-translation-1"}, {"path": "khan/test-prep/mcat/biomolecules/dna/protein-translation-2/", "id": "IQiv4uQNaFQ", "title": "Protein translation 2", "kind": "Video", "slug": "protein-translation-2"}, {"path": "khan/test-prep/mcat/biomolecules/dna/differences-in-translation-between-prokaryotes-and-eukaryotes/", "id": "WNZf4ip_R9s", "title": "Differences in translation between prokaryotes and eukaryotes", "kind": "Video", "slug": "differences-in-translation-between-prokaryotes-and-eukaryotes"}, {"path": "khan/test-prep/mcat/biomolecules/dna/dna-repair-1/", "id": "o4yJF90OR9M", "title": "DNA repair 1", "kind": "Video", "slug": "dna-repair-1"}, {"path": "khan/test-prep/mcat/biomolecules/dna/dna-repair-2/", "id": "PySVsEUnrng", "title": "DNA repair 2", "kind": "Video", "slug": "dna-repair-2"}, {"path": "khan/test-prep/mcat/biomolecules/dna/protein-modifications/", "id": "K2bGjTaNsnM", "title": "Protein modifications", "kind": "Video", "slug": "protein-modifications"}, {"path": "khan/test-prep/mcat/biomolecules/dna/jacob-monod-lac-operon/", "id": "H3i-OUb5z1k", "title": "Jacob Monod lac operon", "kind": "Video", "slug": "jacob-monod-lac-operon"}], "in_knowledge_map": false, "description": "1B: DNA makes RNA, and RNA makes protein - in a nutshell, this is the central dogma of molecular biology. Let\u2019s delve into that simple notion here so we can come to a better understand of the flow of genetic information.", "node_slug": "dna", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/dna", "extended_slug": "test-prep/mcat/biomolecules/dna", "kind": "Topic", "slug": "dna"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/gene-control/", "id": "gene-control", "hide": false, "title": "Gene control", "child_data": [{"kind": "Exercise", "id": "x4f99dc07"}, {"kind": "Video", "id": "xae77a655"}, {"kind": "Video", "id": "x4f8acd81"}, {"kind": "Video", "id": "x9fd7ee93"}, {"kind": "Video", "id": "x11cb2084"}, {"kind": "Video", "id": "xcd2b2b61"}, {"kind": "Video", "id": "x6b4f4ba8"}, {"kind": "Video", "id": "x4708fb6d"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/gene-control/gene-expression-questions/", "id": "gene-expression-questions", "title": "Gene control questions", "description": "Gene Expression questions", "slug": "gene-expression-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/gene-control/jacob-monod-the-lac-operon/", "id": "jRCdXNfngLc", "title": "Jacob-Monod: The Lac operon", "kind": "Video", "slug": "jacob-monod-the-lac-operon"}, {"path": "khan/test-prep/mcat/biomolecules/gene-control/dna-and-chromatin-regulation/", "id": "OqRt723t33o", "title": "DNA and chromatin regulation", "kind": "Video", "slug": "dna-and-chromatin-regulation"}, {"path": "khan/test-prep/mcat/biomolecules/gene-control/regulation-of-transcription/", "id": "ypH-hDKpCY0", "title": "Regulation of transcription", "kind": "Video", "slug": "regulation-of-transcription"}, {"path": "khan/test-prep/mcat/biomolecules/gene-control/post-translational-regulation/", "id": "nz5rbvt64kE", "title": "Post-transcriptional regulation", "kind": "Video", "slug": "post-translational-regulation"}, {"path": "khan/test-prep/mcat/biomolecules/gene-control/non-coding-rna-ncrna/", "id": "9YrS35wxE7o", "title": "Non-coding RNA (ncRNA)", "kind": "Video", "slug": "non-coding-rna-ncrna"}, {"path": "khan/test-prep/mcat/biomolecules/gene-control/oncogenes/", "id": "QRPRmRAOCog", "title": "Oncogenes", "kind": "Video", "slug": "oncogenes"}, {"path": "khan/test-prep/mcat/biomolecules/gene-control/tumor-suppressors/", "id": "XhSsMjuzt9Y", "title": "Tumor suppressors", "kind": "Video", "slug": "tumor-suppressors"}], "in_knowledge_map": false, "description": "1B: Cells have many intricate mechanisms which regulate expression of genetic material - from transcription of RNA to translation of protein. At every point in this process, enzymes in your body can step in to modulate how much or how little RNA, or protein is produced from the genome. Sometimes, these genetic controls go awry, and so cells grow without inhibition - this is often how tumors develop, a pathogenic process we will also explore.", "node_slug": "gene-control", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/gene-control", "extended_slug": "test-prep/mcat/biomolecules/gene-control", "kind": "Topic", "slug": "gene-control"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/genetic-mutations/", "id": "genetic-mutations", "hide": false, "title": "Genetic mutations", "child_data": [{"kind": "Exercise", "id": "xf61caf1b"}, {"kind": "Video", "id": "xa20533ca"}, {"kind": "Video", "id": "x160dd9bd"}, {"kind": "Video", "id": "xc5b66ac4"}, {"kind": "Video", "id": "x149a9fec"}, {"kind": "Video", "id": "x735334d0"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/genetic-mutations/genetic-mutations-questions/", "id": "genetic-mutations-questions", "title": "Genetic mutations questions", "description": "Genetic mutations questions", "slug": "genetic-mutations-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/genetic-mutations/an-introduction-to-genetic-mutations/", "id": "g02RnGXCXrQ", "title": "An introduction to genetic mutations", "kind": "Video", "slug": "an-introduction-to-genetic-mutations"}, {"path": "khan/test-prep/mcat/biomolecules/genetic-mutations/the-different-types-of-mutations/", "id": "xYOK-yzUWSI", "title": "The different types of mutations", "kind": "Video", "slug": "the-different-types-of-mutations"}, {"path": "khan/test-prep/mcat/biomolecules/genetic-mutations/the-causes-of-genetic-mutations/", "id": "rtUoWyIE1FM", "title": "The causes of genetic mutations", "kind": "Video", "slug": "the-causes-of-genetic-mutations"}, {"path": "khan/test-prep/mcat/biomolecules/genetic-mutations/mutagens-and-carcinogens/", "id": "4mrp5uI9anE", "title": "Mutagens and carcinogens", "kind": "Video", "slug": "mutagens-and-carcinogens"}, {"path": "khan/test-prep/mcat/biomolecules/genetic-mutations/the-effects-of-mutations/", "id": "JxC2phkdY8Y", "title": "The effects of mutations", "kind": "Video", "slug": "the-effects-of-mutations"}], "in_knowledge_map": false, "description": "1C: Mutations are not always a bad thing - they give rise to much of the spice and flavor of life. But sometimes they are a result of environmental injury and can give rise to malignant disease processes like cancer. We will look at the causes and types of genetics mutations in this series as we also examine their effect on biological systems.", "node_slug": "genetic-mutations", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/genetic-mutations", "extended_slug": "test-prep/mcat/biomolecules/genetic-mutations", "kind": "Topic", "slug": "genetic-mutations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/", "id": "mendelian-genetics", "hide": false, "title": "Mendelian genetics", "child_data": [{"kind": "Exercise", "id": "xb2ccf227"}, {"kind": "Video", "id": "x26977c57"}, {"kind": "Video", "id": "x3c7567eb"}, {"kind": "Video", "id": "23942"}, {"kind": "Video", "id": "x5628ee19"}, {"kind": "Video", "id": "x15272d4a"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/mendelian-genetics-questions/", "id": "mendelian-genetics-questions", "title": "Mendelian genetics questions", "description": "Mendelian genetics questions", "slug": "mendelian-genetics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/an-introduction-to-mendelian-genetics/", "id": "NR3779ef9yQ", "title": "An Introduction to Mendelian Genetics", "kind": "Video", "description": "An introduction to Mendelian Genetics and inheritance. By Ross Firestone.\nAn introduction to Mendelian Genetics and inheritance.", "slug": "an-introduction-to-mendelian-genetics"}, {"path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/co-dominance-and-incomplete-dominance/", "id": "OVM68-0YVWI", "title": "Co-dominance and Incomplete Dominance", "kind": "Video", "description": "Come learn about Co-dominance and incomplete dominance and\u00a0\nhow they differ from complete dominance. By Ross Firestone.", "slug": "co-dominance-and-incomplete-dominance"}, {"path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/punnett-square-fun/", "id": "D5ymMYcLtv0", "title": "Punnett square fun", "kind": "Video", "description": "Dihybrid crosses. Independent assortment. Incomplete dominance. Codominance and multiple alleles.", "slug": "punnett-square-fun"}, {"path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/hardy-weinberg/", "id": "oc9fJCAIRJs", "title": "Hardy Weinberg equation", "kind": "Video", "slug": "hardy-weinberg"}, {"path": "khan/test-prep/mcat/biomolecules/mendelian-genetics/applying-hardy-weinberg/", "id": "D5NVlAaT-OA", "title": "Applying the Hardy Weinberg equation", "kind": "Video", "slug": "applying-hardy-weinberg"}], "in_knowledge_map": false, "description": "1C: Why do some people have blue eyes and others brown? What determines your blood type? You will be able to answer questions like these as you have some fun with Punnett squares and discover the mechanisms of inheritance (and what all this has to do with a 19th-century German monk).", "node_slug": "mendelian-genetics", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/mendelian-genetics", "extended_slug": "test-prep/mcat/biomolecules/mendelian-genetics", "kind": "Topic", "slug": "mendelian-genetics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/dna-technology/", "id": "dna-technology", "hide": false, "title": "DNA technology", "child_data": [{"kind": "Exercise", "id": "x878487c3"}, {"kind": "Video", "id": "x182964ae"}, {"kind": "Video", "id": "x840edeaa"}, {"kind": "Video", "id": "x18d18fff"}, {"kind": "Video", "id": "x21623e6b"}, {"kind": "Video", "id": "x2a325246"}, {"kind": "Video", "id": "x568e9ce4"}, {"kind": "Video", "id": "xd79432d0"}, {"kind": "Video", "id": "x1baa728e"}, {"kind": "Video", "id": "x94c27abc"}, {"kind": "Video", "id": "x37c99fd7"}, {"kind": "Video", "id": "xda6f743f"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/dna-technology/dna-technology-questions/", "id": "dna-technology-questions", "title": "DNA technology questions", "description": "Questions pertaining to DNA technology", "slug": "dna-technology-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/restriction-enzymes/", "id": "U2cKywEn6KY", "title": "Restriction enzymes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "restriction-enzymes"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/dna-libraries-generating-cdna/", "id": "aQxyXfIfa9A", "title": "DNA libraries & generating cDNA", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "dna-libraries-generating-cdna"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/hybridization-microarray/", "id": "xoxUWGl8WFs", "title": "Hybridization (microarray)", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hybridization-microarray"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/expressing-cloned-genes/", "id": "bCcxJlPHSmc", "title": "Expressing cloned genes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "expressing-cloned-genes"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/polymerase-chain-reaction-pcr/", "id": "aUBJtHwHASA", "title": "Polymerase chain reaction (PCR)", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "polymerase-chain-reaction-pcr"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/gel-electrophoresis-2/", "id": "u_WqMXmCi7c", "title": "Gel electrophoresis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "gel-electrophoresis-2"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/southern-blot/", "id": "Zps2uH8aWVU", "title": "Southern blot", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "southern-blot"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/dna-sequencing/", "id": "Jnk_4Maf5Fk", "title": "DNA sequencing", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "dna-sequencing"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/gene-expression-and-function/", "id": "vP23dkY0mPo", "title": "Gene expression and function", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "gene-expression-and-function"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/applications-of-dna-technologies/", "id": "gqMqYYcJgz4", "title": "Applications of DNA technologies", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "applications-of-dna-technologies"}, {"path": "khan/test-prep/mcat/biomolecules/dna-technology/safety-and-ethics-of-dna-technologies/", "id": "7fztCjCfhZQ", "title": "Safety and ethics of DNA technologies", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "safety-and-ethics-of-dna-technologies"}], "in_knowledge_map": false, "description": "Thanks to advances in DNA technology, we can now clone genes, control gene expression, and sequence entire genomes. How is this possible? These videos will cover the techniques that revolutionized molecular biology and continue to be used almost daily in research labs around the world.", "node_slug": "dna-technology", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/dna-technology", "extended_slug": "test-prep/mcat/biomolecules/dna-technology", "kind": "Topic", "slug": "dna-technology"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/", "id": "chromosomal-inheritance", "hide": false, "title": "Chromosomal inheritance", "child_data": [{"kind": "Exercise", "id": "xf7b63e29"}, {"kind": "Video", "id": "x3d699a3c"}, {"kind": "Video", "id": "x95c0a545"}, {"kind": "Video", "id": "23946"}, {"kind": "Video", "id": "23942"}, {"kind": "Video", "id": "x6e2290ad"}, {"kind": "Video", "id": "x18b8c30a"}, {"kind": "Video", "id": "x2e49d122"}, {"kind": "Video", "id": "x3ce4eef4"}, {"kind": "Video", "id": "x51994d7d"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/chromosomal-inheritance-questions/", "id": "chromosomal-inheritance-questions", "title": "Chromosomal inheritance questions", "description": "Questions pertaining to chromosomal inheritance", "slug": "chromosomal-inheritance-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/evidence-that-dna-is-genetic-material-1/", "id": "IMvBKaeaxco", "title": "Evidence that DNA is genetic material 1", "kind": "Video", "slug": "evidence-that-dna-is-genetic-material-1"}, {"path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/evidence-that-dna-is-genetic-material-2/", "id": "oC_-oUOEaVM", "title": "Evidence that DNA is genetic material 2", "kind": "Video", "slug": "evidence-that-dna-is-genetic-material-2"}, {"path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/sex-linked-traits/", "id": "-ROhfKyxgCo", "title": "Sex-linked traits", "kind": "Video", "description": "Chromosomal basis for gender. Sex-linked traits.", "slug": "sex-linked-traits"}, {"path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/punnett-square-fun/", "id": "D5ymMYcLtv0", "title": "Punnett square fun", "kind": "Video", "description": "Dihybrid crosses. Independent assortment. Incomplete dominance. Codominance and multiple alleles.", "slug": "punnett-square-fun"}, {"path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/genetic-recombination-1/", "id": "BlnUNmfGn7I", "title": "Genetic recombination 1", "kind": "Video", "slug": "genetic-recombination-1"}, {"path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/genetic-recombination-2/", "id": "jrGpD13LLf8", "title": "Genetic recombination 2", "kind": "Video", "slug": "genetic-recombination-2"}, {"path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/gene-mapping/", "id": "ZeATszO-6e0", "title": "Gene mapping", "kind": "Video", "slug": "gene-mapping"}, {"path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/extranuclear-inheritance-1/", "id": "yyM0yIOJ2yE", "title": "Extranuclear inheritance 1", "kind": "Video", "slug": "extranuclear-inheritance-1"}, {"path": "khan/test-prep/mcat/biomolecules/chromosomal-inheritance/extranuclear-inheritance-2/", "id": "RjzzgiUpaQY", "title": "Extranuclear inheritance 2", "kind": "Video", "slug": "extranuclear-inheritance-2"}], "in_knowledge_map": false, "description": "Between 1856 and 1863, Gregor Mendel did a series of experiments with pea plants that established much of our fundamental understanding of heredity. In this section you will learn how traits are passed down from parents to their offspring and how genetic recombination can produce organisms with new gene combinations.", "node_slug": "chromosomal-inheritance", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/chromosomal-inheritance", "extended_slug": "test-prep/mcat/biomolecules/chromosomal-inheritance", "kind": "Topic", "slug": "chromosomal-inheritance"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/", "id": "evolution-population-dynmaics", "hide": false, "title": "Evolution and population dynamics", "child_data": [{"kind": "Exercise", "id": "x8922de36"}, {"kind": "Video", "id": "xb358a3c7"}, {"kind": "Video", "id": "x2d066b76"}, {"kind": "Video", "id": "xfbcf3fec"}, {"kind": "Video", "id": "xd13f37bc"}, {"kind": "Video", "id": "x918eb2d9"}, {"kind": "Video", "id": "x2c49b090"}, {"kind": "Article", "id": "xab3fa29b"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/evolution-and-population-dynamics-questions/", "id": "evolution-and-population-dynamics-questions", "title": "Evolution and population dynamics questions", "description": "Evolution and population dynamics questions", "slug": "evolution-and-population-dynamics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/evolution-natural-selection/", "id": "Me_041nrRZk", "title": "Evolution and natural selection", "kind": "Video", "description": "Learn the fundamental principles about how natural selection can drive the process of evolution.\u00a0 By Ross Firestone.", "slug": "evolution-natural-selection"}, {"path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/fitness-and-fecundity/", "id": "l5aJ1Y1CiEs", "title": "Fitness and fecundity", "kind": "Video", "description": "Learn about the concept of fecundity and how it contributes to an organism's overall biological fitness. By Ross Firestone.", "slug": "fitness-and-fecundity"}, {"path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/alternative-selection/", "id": "RB7H7paHXd0", "title": "Alternative selection", "kind": "Video", "description": "Learn about driving forces of evolution other than natural selection. Group selection and artificial selection are just a few of these forms of \"Alternative Selection.\"\u00a0 By Ross Firestone.", "slug": "alternative-selection"}, {"path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/bottlenecks-the-environment/", "id": "YWE9HuV0lo8", "title": "Bottlenecks and the environment", "kind": "Video", "description": "Learn about how changes in the environment can change the way natural selection behaves. What happens when a population's environment changes drastically?\u00a0 By Ross Firestone.", "slug": "bottlenecks-the-environment"}, {"path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/inbreeding/", "id": "eg7ltl5vll0", "title": "Inbreeding", "kind": "Video", "description": "Learn about inbreeding and how it can hurt a population's genetic diversity. By Ross Firestone.", "slug": "inbreeding"}, {"path": "khan/test-prep/mcat/biomolecules/evolution-population-dynmaics/reproductive-isolation/", "id": "vmgKC2IJjOI", "title": "Reproductive isolation", "kind": "Video", "description": "What makes two organisms members of different species? Learn about the forces behind reproductive isolation. By Ross Firestone.", "slug": "reproductive-isolation"}], "in_knowledge_map": false, "description": "1C: Charles Darwin inaugurated the field of evolutionary biology 150 years ago with the publication of \u201cOn the Origin of Species.\u201d You will learn about the driving forces of evolution beyond natural selection and the relationship between populations and their environments. The story of Darwin\u2019s finches will make a lot more sense.", "node_slug": "evolution-population-dynmaics", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/evolution-population-dynmaics", "extended_slug": "test-prep/mcat/biomolecules/evolution-population-dynmaics", "kind": "Topic", "slug": "evolution-population-dynmaics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/principles-of-bioenergetics/", "id": "principles-of-bioenergetics", "hide": false, "title": "Principles of bioenergetics", "child_data": [{"kind": "Exercise", "id": "xaeb783a3"}, {"kind": "Exercise", "id": "x7a46fb33"}, {"kind": "Video", "id": "xd9cd47f4"}, {"kind": "Video", "id": "x34d1968c"}, {"kind": "Video", "id": "x0c3b1a42"}, {"kind": "Video", "id": "xcfac46de"}, {"kind": "Video", "id": "388057"}, {"kind": "Video", "id": "xe46d55e0"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/principles-of-bioenergetics/principles-of-bioenergetics-questions/", "id": "principles-of-bioenergetics-questions", "title": "Bioenergetics questions", "description": "Questions related to bioenergetics", "slug": "principles-of-bioenergetics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/principles-of-bioenergetics/bioenergetics-questions/", "id": "bioenergetics-questions", "title": "Bioenergetics questions (2)", "description": "Bioenergetics questions", "slug": "bioenergetics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/principles-of-bioenergetics/gibbs-free-energy-introduction/", "id": "ZBLoUQAMWP8", "title": "Gibbs free energy introduction", "kind": "Video", "slug": "gibbs-free-energy-introduction"}, {"path": "khan/test-prep/mcat/biomolecules/principles-of-bioenergetics/gibbs-free-energy-an-analogy/", "id": "qTXZ6UrO54U", "title": "An analogy for Gibbs free energy", "kind": "Video", "slug": "gibbs-free-energy-an-analogy"}, {"path": "khan/test-prep/mcat/biomolecules/principles-of-bioenergetics/heat-transfer-1/", "id": "JoFSRuJDp5o", "title": "Heat transfer", "kind": "Video", "slug": "heat-transfer-1"}, {"path": "khan/test-prep/mcat/biomolecules/principles-of-bioenergetics/enthalpy-1/", "id": "AfjH7Xn8VB8", "title": "Enthalpy", "kind": "Video", "slug": "enthalpy-1"}, {"path": "khan/test-prep/mcat/biomolecules/principles-of-bioenergetics/le-chatelier-s-principle/", "id": "4-fEvpVNTlE", "title": "Le Chatelier's principle", "kind": "Video", "description": "Le Chatelier's Principle regarding the \"stressing\" of reactions in equilibrium", "slug": "le-chatelier-s-principle"}, {"path": "khan/test-prep/mcat/biomolecules/principles-of-bioenergetics/thermodynamics-vs-kinetics/", "id": "l-l_8cSQdEw", "title": "Thermodynamics vs kinetics", "kind": "Video", "slug": "thermodynamics-vs-kinetics"}], "in_knowledge_map": false, "description": "1D: When you light a candle, energy in the form of heat is dissipated into the surroundings. Without energy transfer, frogs wouldn\u2019t jump, and cheetahs wouldn\u2019t run. We will discuss Gibbs free energy, enthalpy, and Le Chatelier\u2019s principles, thermodynamic concepts governing energy transfer as we examine their relationship to metabolism. After this tutorial, you will understand what it really means to \u201cburn calories\u201d during exercise.", "node_slug": "principles-of-bioenergetics", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/principles-of-bioenergetics", "extended_slug": "test-prep/mcat/biomolecules/principles-of-bioenergetics", "kind": "Topic", "slug": "principles-of-bioenergetics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/overview-metabolism/", "id": "overview-metabolism", "hide": false, "title": "Overview of metabolism", "child_data": [{"kind": "Exercise", "id": "x34893208"}, {"kind": "Video", "id": "xb2f307f7"}, {"kind": "Article", "id": "x61971e2c"}, {"kind": "Video", "id": "xb7f05d8d"}, {"kind": "Video", "id": "xb219c635"}, {"kind": "Video", "id": "x8f9c2be6"}, {"kind": "Video", "id": "23956"}, {"kind": "Video", "id": "xc553bc46"}, {"kind": "Video", "id": "x654477f1"}, {"kind": "Video", "id": "xaa3f87dd"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/overview-metabolism/overview-of-metabolism-questions/", "id": "overview-of-metabolism-questions", "title": "Overview of metabolism questions", "description": "Questions pertaining to overview of metabolism", "slug": "overview-of-metabolism-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/overview-metabolism/overview-of-metabolism-anabolism-and-catabolism/", "id": "ST1UWnenOo0", "title": "Overview of metabolism: Anabolism and catabolism", "kind": "Video", "description": "What is the purpose of metabolism? Learn about the two major divisions in metabolism: anabolism (building up) and catabolism (breaking down).\u00a0 By Jasmine Rana.", "slug": "overview-of-metabolism-anabolism-and-catabolism"}, {"path": "khan/test-prep/mcat/biomolecules/overview-metabolism/adenosine-triphosphate/", "id": "PK6HmIe2EAg", "title": "ATP: Adenosine triphosphate", "kind": "Video", "description": "Learn more about ATP: how it stores energy, and how that energy is released when it's converted to ATP and phosphate.", "slug": "adenosine-triphosphate"}, {"path": "khan/test-prep/mcat/biomolecules/overview-metabolism/atp-hydrolysis-gibbs-free-energy/", "id": "76O8KpO_4Zw", "title": "ATP hydrolysis: Gibbs free energy", "kind": "Video", "description": "How does ATP provide energy for biosynthesis reactions? Use an understanding of Gibbs Free Energy to understand how ATP is coupled to energy-requiring processes. By Jasmine Rana.", "slug": "atp-hydrolysis-gibbs-free-energy"}, {"path": "khan/test-prep/mcat/biomolecules/overview-metabolism/atp-hydrolysis-transfer-of-a-phosphate-group/", "id": "AcNDiCzz3do", "title": "ATP hydrolysis: Transfer of a phosphate group", "kind": "Video", "description": "How is ATP coupled to energy-requiring processes? How does the transfer of a phosphate group \"fuel\" chemical reactions?", "slug": "atp-hydrolysis-transfer-of-a-phosphate-group"}, {"path": "khan/test-prep/mcat/biomolecules/overview-metabolism/oxidation-and-reduction-from-biological-view/", "id": "orI2m6IarJg", "title": "Oxidation and reduction review from biological point-of-view", "kind": "Video", "description": "Taking a looking at oxidation and reduction in a biological context.", "slug": "oxidation-and-reduction-from-biological-view"}, {"path": "khan/test-prep/mcat/biomolecules/overview-metabolism/oxidation-and-reduction-in-metabolism/", "id": "g7GXj5QTnJw", "title": "Oxidation and reduction in metabolism", "kind": "Video", "description": "How is metabolism similar to a galvanic cell? Apply fundamental principles of electrochemistry to understand the energy harnessed from the oxidation-reduction processes of metabolism.", "slug": "oxidation-and-reduction-in-metabolism"}, {"path": "khan/test-prep/mcat/biomolecules/overview-metabolism/electron-carrier-molecules/", "id": "yDCeMg0krRM", "title": "Electron carrier molecules", "kind": "Video", "description": "What are electron carrier molecules? What role do they play in metabolism? Learn how electron carrier molecules capture the flow of electrons from the breakdown of a fuel (e.g. glucose) to produce ATP.", "slug": "electron-carrier-molecules"}, {"path": "khan/test-prep/mcat/biomolecules/overview-metabolism/atp-hydrolysis/", "id": "M-aktLHDZEA", "title": "ATP hydrolysis mechanism", "kind": "Video", "slug": "atp-hydrolysis"}], "in_knowledge_map": false, "description": "1D: You are breathing, your heart is beating, and you are reading this sentence. All these processes would be impossible were it not for the chemical energy produce within our cells. In this tutorial, we will integrate the biology and chemistry of metabolism as we walk you through the electron transport chain and the production of ATP, the ultimate energy currency in our bodies.", "node_slug": "overview-metabolism", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/overview-metabolism", "extended_slug": "test-prep/mcat/biomolecules/overview-metabolism", "kind": "Topic", "slug": "overview-metabolism"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/carbohydrates/", "id": "carbohydrates", "hide": false, "title": "Carbohydrates", "child_data": [{"kind": "Exercise", "id": "xcd71fba2"}, {"kind": "Video", "id": "x1761796b"}, {"kind": "Video", "id": "xadddf3af"}, {"kind": "Video", "id": "xb4a4cc38"}, {"kind": "Video", "id": "x2a49b048"}, {"kind": "Video", "id": "xe885dfb1"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/carbohydrates/carbohydrate-questions/", "id": "carbohydrate-questions", "title": "Carbohydrate questions", "description": "Questions pertaining to carbohydrates", "slug": "carbohydrate-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrates/carbohydrates-naming-and-classification/", "id": "doe_zZDjU5c", "title": "Carbohydrates - naming and classification", "kind": "Video", "slug": "carbohydrates-naming-and-classification"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrates/carbohydrates-absolute-configuration-epimers-common-names/", "id": "U5xnGyw2llY", "title": "Carbohydrates - absolute configuration, epimers, common names", "kind": "Video", "slug": "carbohydrates-absolute-configuration-epimers-common-names"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrates/carbohydrates-cyclic-structures-and-anomers-1/", "id": "4ztQjBGbecw", "title": "Carbohydrates - Cyclic structures and anomers", "kind": "Video", "slug": "carbohydrates-cyclic-structures-and-anomers-1"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrates/carbohydrates-di-and-polysaccharides/", "id": "e_WWO2O5Nb8", "title": "Carbohydrates- di and polysaccharides", "kind": "Video", "slug": "carbohydrates-di-and-polysaccharides"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrates/keto-enol-tautomerization-2/", "id": "NdRl1C6Jr5o", "title": "Keto-enol tautomerization (by Jay)", "kind": "Video", "description": "Mechanisms for acid and base catalyzed keto-enol tautomerization. By Jay.", "slug": "keto-enol-tautomerization-2"}], "in_knowledge_map": false, "description": "1D: Sugars are more than a prelude to a trip to the dentist - they makes life itself possible. This tutorial will describe the structure of these vital biomolecules.", "node_slug": "carbohydrates", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/carbohydrates", "extended_slug": "test-prep/mcat/biomolecules/carbohydrates", "kind": "Topic", "slug": "carbohydrates"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/", "id": "carbohydrate-metabolism", "hide": false, "title": "Carbohydrate Metabolism", "child_data": [{"kind": "Exercise", "id": "xf2ac672e"}, {"kind": "Article", "id": "x39723a5e"}, {"kind": "Article", "id": "x270497fb"}, {"kind": "Video", "id": "23954"}, {"kind": "Video", "id": "23960"}, {"kind": "Video", "id": "x4162ad15"}, {"kind": "Video", "id": "xe52e787e"}, {"kind": "Video", "id": "x6a6c4fa2"}, {"kind": "Video", "id": "x7027a9d4"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/carbohydrate-metabolism-questions/", "id": "carbohydrate-metabolism-questions", "title": "Carbohydrate metabolism questions", "description": "Carbohydrate metabolism questions", "slug": "carbohydrate-metabolism-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/introduction-to-cellular-respiration/", "id": "2f7YwCtHcgk", "title": "Introduction to cellular respiration", "kind": "Video", "description": "Introduction to cellular respiration, including glycolysis, the Krebs Cycle, and the electron transport chain.", "slug": "introduction-to-cellular-respiration"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/glycolysis/", "id": "FE2jfTXAJHg", "title": "Overview of glycolysis", "kind": "Video", "description": "Overview of the basics of glycolysis.", "slug": "glycolysis"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/gluconeogenesis/", "id": "RHQH16HjcPs", "title": "Gluconeogenesis: the big picture", "kind": "Video", "description": "What are the reactions that are unique to gluconeogenesis (vs. glycolysis)?Where does gluconeogenesis fit into carbohydrate metabolism? What is the big picture?", "slug": "gluconeogenesis"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/gluconeogenesis-unique-reactions/", "id": "RY66P59MTCA", "title": "Gluconeogenesis: unique reactions", "kind": "Video", "slug": "gluconeogenesis-unique-reactions"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/regulation-of-glycolysis-and-gluconeogenesis/", "id": "5TtB1_Zfatc", "title": "Regulation of glycolysis and gluconeogenesis", "kind": "Video", "description": "What are the major forms of regulation in metabolism? How do these apply to glycolysis and gluconeogenesis?", "slug": "regulation-of-glycolysis-and-gluconeogenesis"}, {"path": "khan/test-prep/mcat/biomolecules/carbohydrate-metabolism/pentose-phosphate-pathway/", "id": "oIz6VyZew6w", "title": "Pentose phosphate pathway", "kind": "Video", "description": "What is the Pentose Phosphate Pathway? Why is it important?", "slug": "pentose-phosphate-pathway"}], "in_knowledge_map": false, "description": "1D: The glucose in the bread of the ham and cheese sandwich you just had for lunch goes on a productive journey within your cells after it is absorbed - the glucose in the bread is involved in several interlinked pathways. Your body has a decision to make - it can either break down the glucose for energy or store it for later. We will delve into the metabolic pathways of glucose - glycolysis, gluconeogenesis, and the pentose phosphate shunt.", "node_slug": "carbohydrate-metabolism", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/carbohydrate-metabolism", "extended_slug": "test-prep/mcat/biomolecules/carbohydrate-metabolism", "kind": "Topic", "slug": "carbohydrate-metabolism"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/", "id": "krebs-citric-acid-cycle-and-oxidative-phosphorylation", "hide": false, "title": "Krebs (citric acid) cycle and oxidative phosphorylation", "child_data": [{"kind": "Exercise", "id": "xc1dab717"}, {"kind": "Exercise", "id": "x060db3ec"}, {"kind": "Article", "id": "x3e9294f2"}, {"kind": "Video", "id": "23962"}, {"kind": "Video", "id": "x41c430a6"}, {"kind": "Video", "id": "x8f03dc77"}, {"kind": "Video", "id": "23964"}, {"kind": "Article", "id": "x8807027f"}, {"kind": "Video", "id": "23966"}, {"kind": "Video", "id": "x898b1905"}, {"kind": "Video", "id": "x1f1c19ca"}, {"kind": "Video", "id": "x41c900ac"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/krebs-citric-acid-cycle-and-oxidative-phosphorylation-questions/", "id": "krebs--citric-acid--cycle-and-oxidative-phosphorylation-questions", "title": "Krebs (citric acid) cycle and oxidative phosphorylation questions", "description": "Krebs (citric acid) cycle and oxidative phosphorylation questions", "slug": "krebs-citric-acid-cycle-and-oxidative-phosphorylation-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/oxidative-phosphorylation-questions/", "id": "oxidative-phosphorylation-questions", "title": "Oxidative phosphorylation questions", "description": "Oxidative phosphorylation questions", "slug": "oxidative-phosphorylation-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/krebs-citric-acid-cycle/", "id": "juM2ROSLWfw", "title": "Krebs / citric acid cycle", "kind": "Video", "description": "Overview of the Krebs or Citric Acid Cycle", "slug": "krebs-citric-acid-cycle"}, {"path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/regulation-of-pyruvate-dehydrogenase/", "id": "_5lmQ_dQOU4", "title": "Regulation of pyruvate dehydrogenase", "kind": "Video", "slug": "regulation-of-pyruvate-dehydrogenase"}, {"path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/regulation-of-krebs-tca-cycle/", "id": "sy9GogcnnwY", "title": "Regulation of Krebs-TCA cycle", "kind": "Video", "slug": "regulation-of-krebs-tca-cycle"}, {"path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/electron-transport-chain/", "id": "mfgCcFXUZRk", "title": "Electron transport chain", "kind": "Video", "description": "Overview of the Electron Transport Chain", "slug": "electron-transport-chain"}, {"path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/oxidative-phosphorylation-and-chemiosmosis/", "id": "W_Q17tqw_7A", "title": "Oxidative phosphorylation and chemiosmosis", "kind": "Video", "description": "Oxidative Phosphorylation and Chemiosmosis (along with slight correction of previous video)", "slug": "oxidative-phosphorylation-and-chemiosmosis"}, {"path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/regulation-of-oxidative-phosphorylation/", "id": "iwi2aLgnqO8", "title": "Regulation of oxidative phosphorylation", "kind": "Video", "slug": "regulation-of-oxidative-phosphorylation"}, {"path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/mitochondria-apoptosis-oxidative-stress/", "id": "3eL_6VWexuk", "title": "Mitochondria, apoptosis, and oxidative stress", "kind": "Video", "slug": "mitochondria-apoptosis-oxidative-stress"}, {"path": "khan/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation/calculating-atp-produced-in-cellular-respiration/", "id": "GKlUFww2g7U", "title": "Calculating ATP produced in cellular respiration", "kind": "Video", "slug": "calculating-atp-produced-in-cellular-respiration"}], "in_knowledge_map": false, "description": "1D: You will learn about the latter steps in cellular respiration - the citric acid cycle and oxidative phosphorylation. It is through these elegant processes that your cells produce energy from sugars, fats, and proteins.", "node_slug": "krebs-citric-acid-cycle-and-oxidative-phosphorylation", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation", "extended_slug": "test-prep/mcat/biomolecules/krebs-citric-acid-cycle-and-oxidative-phosphorylation", "kind": "Topic", "slug": "krebs-citric-acid-cycle-and-oxidative-phosphorylation"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/", "id": "fat-and-protein-metabolism", "hide": false, "title": "Fat and protein metabolism", "child_data": [{"kind": "Exercise", "id": "xe0959d85"}, {"kind": "Video", "id": "x99119a39"}, {"kind": "Video", "id": "xb68b3dd1"}, {"kind": "Video", "id": "xc21e9df0"}, {"kind": "Video", "id": "xffc2dc5e"}, {"kind": "Video", "id": "xd91b1bca"}, {"kind": "Video", "id": "x7c36e80f"}, {"kind": "Video", "id": "xd318a3e5"}, {"kind": "Video", "id": "xc4a5fd0b"}, {"kind": "Video", "id": "x856f12f7"}, {"kind": "Video", "id": "x89ac1728"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/fat-and-protein-metabolism-questions/", "id": "fat-and-protein-metabolism-questions", "title": "Fat and protein metabolism questions", "description": "Fat and protein metabolism questions", "slug": "fat-and-protein-metabolism-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/introduction-to-energy-storage/", "id": "m3t3mfahh_4", "title": "Introduction to energy storage", "kind": "Video", "slug": "introduction-to-energy-storage"}, {"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/digestion-mobilization-and-transport-of-fats-part-i/", "id": "yqJB8XMXzE4", "title": "Digestion, Mobilization, and Transport of Fats - Part I", "kind": "Video", "description": "1D: How are fats digested, mobilized, and transported inside the body in the fed and fasted states?", "slug": "digestion-mobilization-and-transport-of-fats-part-i"}, {"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/fatty-acid-synthesis-part-i/", "id": "d0Sk5trLUbU", "title": "Fatty Acid Synthesis - Part I", "kind": "Video", "description": "1D: What are the sources of fatty acids in the blood stream? Where are fatty acids synthesized? How are the synthesized?", "slug": "fatty-acid-synthesis-part-i"}, {"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/digestion-mobilization-and-transport-of-fats-part-ii/", "id": "hZLcV_wIqus", "title": "Digestion, Mobilization, and Transport of Fats - Part II", "kind": "Video", "description": "1D: How are fats digested, mobilized, and transported inside the body in the fed and fasted states?", "slug": "digestion-mobilization-and-transport-of-fats-part-ii"}, {"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/fatty-acid-synthesis-part-ii/", "id": "tLBLn6taNI4", "title": "Fatty Acid Synthesis - Part II", "kind": "Video", "description": "1D: What are the sources of fatty acids in the blood stream? Where are fatty acids synthesized? How are the synthesized?", "slug": "fatty-acid-synthesis-part-ii"}, {"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/overview-of-fatty-acid-oxidation/", "id": "z-N9IzR9fAY", "title": "Overview of Fatty Acid Oxidation", "kind": "Video", "description": "1D: How do we extract ATP from fat? How much ATP do we produce?", "slug": "overview-of-fatty-acid-oxidation"}, {"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/fatty-acid-oxidation-part-i/", "id": "uKu566g3j7g", "title": "Fatty Acid Oxidation - Part I", "kind": "Video", "description": "1D: What are the three phases required for fatty acid oxidation? Where in the cell do these reactions take place? How is this process regulated?", "slug": "fatty-acid-oxidation-part-i"}, {"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/fatty-acid-oxidation-part-ii/", "id": "WFk7nT51q4U", "title": "Fatty Acid Oxidation - Part II", "kind": "Video", "description": "1D: What are the three phases required for fatty acid oxidation? Where in the cell do these reactions take place? How is this process regulated?", "slug": "fatty-acid-oxidation-part-ii"}, {"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/how-does-the-body-adapt-to-starvation/", "id": "2DI_X16I4-s", "title": "How does the body adapt to starvation?", "kind": "Video", "description": "1D: How does the body utilize the major energy storage fuels? What are ketones? Why can't fatty acids be converted to glucose?", "slug": "how-does-the-body-adapt-to-starvation"}, {"path": "khan/test-prep/mcat/biomolecules/fat-and-protein-metabolism/overview-of-amino-acid-metabolism/", "id": "r1tggaFV0yo", "title": "Overview of Amino Acid Metabolism", "kind": "Video", "description": "1D: What is unique about the catabolism of amino acids (vs. glucose and fatty acids)?", "slug": "overview-of-amino-acid-metabolism"}], "in_knowledge_map": false, "description": "1D: The ham and cheese sandwich you just enjoyed need to be processed by the cells of your body. In addition to the sweet glucose we happily consume, we also take in fat (great for storing energy compactly) and proteins (which can be metabolized to produce energy or used as building blocks for innumerable parts of your body). These tutorials will shed light on the key metabolic pathways governing the metabolism of fats and proteins.", "node_slug": "fat-and-protein-metabolism", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/fat-and-protein-metabolism", "extended_slug": "test-prep/mcat/biomolecules/fat-and-protein-metabolism", "kind": "Topic", "slug": "fat-and-protein-metabolism"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/endocrine-system-fc1/", "id": "endocrine-system-fc1", "hide": false, "title": "Endocrine system", "child_data": [{"kind": "Video", "id": "xaf2ad25b"}, {"kind": "Exercise", "id": "x993cf2da"}, {"kind": "Video", "id": "x26e9c294"}, {"kind": "Video", "id": "xcdd0a401"}, {"kind": "Video", "id": "x9ff1d77e"}, {"kind": "Video", "id": "xd4489fab"}, {"kind": "Video", "id": "x9f41189c"}, {"kind": "Video", "id": "xada599e1"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/endocrine-system-fc1/endocrine-gland-hormone-review/", "id": "ER49EweKwW8", "title": "Endocrine gland hormone review", "kind": "Video", "description": "Welcome to the Endocrine System. Get ready to learn about one of the most important ways that our body parts communicate! By Ryan Patton.", "slug": "endocrine-gland-hormone-review"}, {"path": "khan/test-prep/mcat/biomolecules/endocrine-system-fc1/endocrine-system-questions-2/", "id": "endocrine-system-questions-2", "title": "Endocrine system questions 2", "description": "Endocrine system questions 2", "slug": "endocrine-system-questions-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/endocrine-system-fc1/hypothalamus-and-pituitary-gland/", "id": "9dS7bc_2bUE", "title": "The hypothalamus and pituitary gland", "kind": "Video", "description": "What makes the endocrine organs tick? Find out in this video about the hypothalamus and pituitary glands! \u00a0By Ryan Patton.", "slug": "hypothalamus-and-pituitary-gland"}, {"path": "khan/test-prep/mcat/biomolecules/endocrine-system-fc1/hormone-concentration-metabolism-negative-feedback/", "id": "RycF0ub2Al0", "title": "Hormone concentration metabolism and negative feedback", "kind": "Video", "description": "In this video we're going to learn about how the concentration of hormones in our blood is regulated. By Ryan Patton.", "slug": "hormone-concentration-metabolism-negative-feedback"}, {"path": "khan/test-prep/mcat/biomolecules/endocrine-system-fc1/types-of-hormones/", "id": "KSclrkk_Ako", "title": "Types of hormones", "kind": "Video", "description": "There are three major types of hormones, based on structure, in our body. Lets find out a little more about them. By Ryan Patton.", "slug": "types-of-hormones"}, {"path": "khan/test-prep/mcat/biomolecules/endocrine-system-fc1/cellular-mechanism-hormone-action/", "id": "TNGSzt2v4xY", "title": "Cellular mechanism of hormone action", "kind": "Video", "description": "Learn about the interaction between chemical messages and their target cells in this video about hormone action. By Ryan Patton.", "slug": "cellular-mechanism-hormone-action"}, {"path": "khan/test-prep/mcat/biomolecules/endocrine-system-fc1/terpenes-to-steroids1/", "id": "ywfxY9UDRo4", "title": "From terpenes to steroids part 1: Terpenes", "kind": "Video", "description": "Steroids have to come from somewhere, right? Let's learn about the carbon building blocks with which steroids are made. By Ryan Patton.", "slug": "terpenes-to-steroids1"}, {"path": "khan/test-prep/mcat/biomolecules/endocrine-system-fc1/terpenes-to-steroids2/", "id": "x9wyOYnot7E", "title": "From terpenes to steroids part 2: Squalene, cholesterol, and steroids", "kind": "Video", "description": "After learning about terpenes, lets see how are body uses them to eventually make all the steroid hormones of our body. By Ryan Patton.", "slug": "terpenes-to-steroids2"}], "in_knowledge_map": false, "description": "1D: Glands are special organs that secrete chemical messages called hormones, which seep into the blood - it\u2019s like putting a tea bag in hot water. As the heart pumps, this blood carries these chemical messages throughout the body, allowing the hormones to interact with specific target cells and organs. Endocrine glands help us to maintain our appetites, grow up, metabolize molecules, concentrate urine,- and oh, so much more! We will examine how these variegated hormones play a role in homeostasis as the body responds to a changing environment.", "node_slug": "endocrine-system-fc1", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/endocrine-system-fc1", "extended_slug": "test-prep/mcat/biomolecules/endocrine-system-fc1", "kind": "Topic", "slug": "endocrine-system-fc1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/", "id": "hormonal-regulation", "hide": false, "title": "Hormonal regulation", "child_data": [{"kind": "Exercise", "id": "x870bc637"}, {"kind": "Video", "id": "xaf2ad25b"}, {"kind": "Video", "id": "xcdd0a401"}, {"kind": "Video", "id": "x9ff1d77e"}, {"kind": "Video", "id": "xb2f307f7"}, {"kind": "Video", "id": "x856f12f7"}, {"kind": "Video", "id": "x7eb846b2"}, {"kind": "Video", "id": "x0d3463ae"}, {"kind": "Video", "id": "51012921"}, {"kind": "Video", "id": "x59043895"}, {"kind": "Video", "id": "x974d9f00"}, {"kind": "Video", "id": "x5bc05694"}], "children": [{"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/hormonal-regulation-questions/", "id": "hormonal-regulation-questions", "title": "Hormonal regulation questions", "description": "Questions pertaining to Hormonal Regulation", "slug": "hormonal-regulation-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/endocrine-gland-hormone-review/", "id": "ER49EweKwW8", "title": "Endocrine gland hormone review", "kind": "Video", "description": "Welcome to the Endocrine System. Get ready to learn about one of the most important ways that our body parts communicate! By Ryan Patton.", "slug": "endocrine-gland-hormone-review"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/hormone-concentration-metabolism-negative-feedback/", "id": "RycF0ub2Al0", "title": "Hormone concentration metabolism and negative feedback", "kind": "Video", "description": "In this video we're going to learn about how the concentration of hormones in our blood is regulated. By Ryan Patton.", "slug": "hormone-concentration-metabolism-negative-feedback"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/types-of-hormones/", "id": "KSclrkk_Ako", "title": "Types of hormones", "kind": "Video", "description": "There are three major types of hormones, based on structure, in our body. Lets find out a little more about them. By Ryan Patton.", "slug": "types-of-hormones"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/overview-of-metabolism-anabolism-and-catabolism/", "id": "ST1UWnenOo0", "title": "Overview of metabolism: Anabolism and catabolism", "kind": "Video", "description": "What is the purpose of metabolism? Learn about the two major divisions in metabolism: anabolism (building up) and catabolism (breaking down).\u00a0 By Jasmine Rana.", "slug": "overview-of-metabolism-anabolism-and-catabolism"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/how-does-the-body-adapt-to-starvation/", "id": "2DI_X16I4-s", "title": "How does the body adapt to starvation?", "kind": "Video", "description": "1D: How does the body utilize the major energy storage fuels? What are ketones? Why can't fatty acids be converted to glucose?", "slug": "how-does-the-body-adapt-to-starvation"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/tissue-specific-metabolism-and-the-metabolic-states/", "id": "l_e1jq_I3sY", "title": "Tissue specific metabolism and the metabolic states", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "tissue-specific-metabolism-and-the-metabolic-states"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/insulin-and-glucagon/", "id": "Id2E72P8Fe0", "title": "Insulin and glucagon", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "insulin-and-glucagon"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/glucose-insulin-and-diabetes/", "id": "rPLjSY00JlE", "title": "Glucose insulin and diabetes", "kind": "Video", "description": "The basics of Type I and Type II diabetes", "slug": "glucose-insulin-and-diabetes"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/production-of-insulin-and-glucagon/", "id": "PwH4oEz94qE", "title": "Production of insulin and glucagon", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "production-of-insulin-and-glucagon"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/hormone-control-of-hunger/", "id": "EVkFPeP5sFI", "title": "Hormone control of hunger", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hormone-control-of-hunger"}, {"path": "khan/test-prep/mcat/biomolecules/hormonal-regulation/hormones-body-mass-and-obesity/", "id": "Mb9TudBudWk", "title": "Hormones, body mass, and obesity", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hormones-body-mass-and-obesity"}], "in_knowledge_map": false, "description": "", "node_slug": "hormonal-regulation", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/biomolecules/hormonal-regulation", "extended_slug": "test-prep/mcat/biomolecules/hormonal-regulation", "kind": "Topic", "slug": "hormonal-regulation"}], "in_knowledge_map": false, "description": "Foundational Concept 1: Biomolecules have unique properties that determine how they contribute to the structure and function of cells, and how they participate in the processes necessary to maintain life.", "node_slug": "biomolecules", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/biomolecules", "extended_slug": "test-prep/mcat/biomolecules", "kind": "Topic", "slug": "biomolecules"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/cells/", "id": "cells", "hide": false, "title": "Cells", "child_data": [{"kind": "Topic", "id": "x04e8e3bd"}, {"kind": "Topic", "id": "xa7045bac"}, {"kind": "Topic", "id": "x46ad3f31"}, {"kind": "Topic", "id": "x5b84caa0"}, {"kind": "Topic", "id": "x62b72c8e"}, {"kind": "Topic", "id": "xd8376254"}, {"kind": "Topic", "id": "xe41fbb27"}, {"kind": "Topic", "id": "xdc83b9bc"}, {"kind": "Topic", "id": "x702e0754"}, {"kind": "Topic", "id": "x83f4d1ff"}, {"kind": "Topic", "id": "xd7fe5b87"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/cell-membrane-overview/", "id": "cell-membrane-overview", "hide": false, "title": "Cell membrane overview", "child_data": [{"kind": "Exercise", "id": "x69579d91"}, {"kind": "Video", "id": "x3af34ed1"}, {"kind": "Video", "id": "x05715c46"}, {"kind": "Video", "id": "xb7ad5d15"}, {"kind": "Video", "id": "xe53e7da2"}, {"kind": "Video", "id": "x9267dcbc"}, {"kind": "Video", "id": "xf01a1e18"}, {"kind": "Article", "id": "x84ec34cd"}], "children": [{"path": "khan/test-prep/mcat/cells/cell-membrane-overview/cell-membrane-questions/", "id": "cell-membrane-questions", "title": "Cell membrane questions", "description": "Cell membrane questions", "slug": "cell-membrane-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/cell-membrane-overview/cell-membrane-introduction/", "id": "QpcACa39YtA", "title": "Cell membrane introduction", "kind": "Video", "description": "Learn about how phospholipids form the cell membrane, and what types of molecules can passively diffuse thorugh the membrane. By William Tsai.", "slug": "cell-membrane-introduction"}, {"path": "khan/test-prep/mcat/cells/cell-membrane-overview/phospholipid-structure/", "id": "CBEys2CTkgE", "title": "Phospholipid structure", "kind": "Video", "description": "Learn about the detailed structure of phospholipids in the cell membrane. By Willaim Tsai.", "slug": "phospholipid-structure"}, {"path": "khan/test-prep/mcat/cells/cell-membrane-overview/cell-membrane-overview-fluid-mosaic-model/", "id": "LXaPt9i9hqk", "title": "Cell membrane overview and fluid mosaic model", "kind": "Video", "description": "Learn about the major components that make up our cell membrane and the fluid mosaic model. By William Tsai.", "slug": "cell-membrane-overview-fluid-mosaic-model"}, {"path": "khan/test-prep/mcat/cells/cell-membrane-overview/cell-membrane-proteins/", "id": "0emD1AmfdjY", "title": "Cell membrane proteins", "kind": "Video", "description": "Learn about the different types of proteins that exist on the cell membrane. By William Tsai.", "slug": "cell-membrane-proteins"}, {"path": "khan/test-prep/mcat/cells/cell-membrane-overview/cell-membrane-fluidity/", "id": "BWQCAsM-CF4", "title": "Cell membrane fluidity", "kind": "Video", "description": "Learn how the phospholipids in the cell membrane maintain membrane fluidity. By William Tsai.", "slug": "cell-membrane-fluidity"}, {"path": "khan/test-prep/mcat/cells/cell-membrane-overview/membrane-dynamics/", "id": "twhqVIokAQc", "title": "Membrane dynamics", "kind": "Video", "description": "Learn about how the phospholipids move around in our cell membrane in the fluid mosaic model. By William Tsai.", "slug": "membrane-dynamics"}], "in_knowledge_map": false, "description": "2A: Not all shall pass! Yards have fences, and cells have membranes. You don\u2019t want just anybody waltzing into your backyard. Similarly, a healthy cell doesn\u2019t just let in any random molecule - this is the concept of selective permeability. Some molecules (e.g. steroids) more easily cross the barrier whereas others (e.g. charged ions) have a more difficult time getting inside the cell without a little help from transporters in the membrane.", "node_slug": "cell-membrane-overview", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/cell-membrane-overview", "extended_slug": "test-prep/mcat/cells/cell-membrane-overview", "kind": "Topic", "slug": "cell-membrane-overview"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/cell-cell-interactions/", "id": "cell-cell-interactions", "hide": false, "title": "Cell-cell interactions", "child_data": [{"kind": "Exercise", "id": "x1823baeb"}, {"kind": "Article", "id": "xf6ecf515"}, {"kind": "Video", "id": "x904a9870"}, {"kind": "Video", "id": "x6589e16e"}, {"kind": "Video", "id": "xbc73c884"}, {"kind": "Video", "id": "x7e31c319"}, {"kind": "Video", "id": "xd63ac3ee"}], "children": [{"path": "khan/test-prep/mcat/cells/cell-cell-interactions/cell-cell-interactions-questions/", "id": "cell-cell-interactions-questions", "title": "Cell-cell interactions questions", "description": "Cell-cell interactions questions", "slug": "cell-cell-interactions-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/cell-cell-interactions/cell-junctions/", "id": "pVWQm-GYK_Y", "title": "Cell Junctions", "kind": "Video", "description": "Learn about the three major types of cell junctions and their functions.", "slug": "cell-junctions"}, {"path": "khan/test-prep/mcat/cells/cell-cell-interactions/membrane-receptors/", "id": "8Otn9DVkm-g", "title": "Membrane Receptors", "kind": "Video", "description": "Learn about how membrane receptors work in our body.", "slug": "membrane-receptors"}, {"path": "khan/test-prep/mcat/cells/cell-cell-interactions/ligand-gated-ion-channels/", "id": "Pl7nzXaVqak", "title": "Ligand Gated Ion Channels", "kind": "Video", "description": "Learn about how ligand gated ion channels work in the cell membrane.", "slug": "ligand-gated-ion-channels"}, {"path": "khan/test-prep/mcat/cells/cell-cell-interactions/g-protein-coupled-receptors/", "id": "ZBSo_GFN3qI", "title": "G Protein Coupled Receptors", "kind": "Video", "description": "Learn about how g protein coupled receptors work in the cell membrane.", "slug": "g-protein-coupled-receptors"}, {"path": "khan/test-prep/mcat/cells/cell-cell-interactions/enzyme-linked-receptors/", "id": "kaoRrzakjGE", "title": "Enzyme Linked Receptors", "kind": "Video", "description": "Learn about how enzyme linked receptors, particularly Receptor Tyrosine Kinases, work in the body.", "slug": "enzyme-linked-receptors"}], "in_knowledge_map": false, "description": "2A: The human body is composed of about 100 trillion cells (this is not counting your bacterial buddies, who actually outnumber your cells 10 to 1!) Your cells must speak to each other to coordinate this massive symphony of life. In this tutorial, you will learn about the molecular basis of cellular signaling that makes this vast network speedy and efficient.", "node_slug": "cell-cell-interactions", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/cell-cell-interactions", "extended_slug": "test-prep/mcat/cells/cell-cell-interactions", "kind": "Topic", "slug": "cell-cell-interactions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/", "id": "transport-across-a-cell-membrane", "hide": false, "title": "Transport across a cell membrane", "child_data": [{"kind": "Exercise", "id": "x33ba6783"}, {"kind": "Article", "id": "xfc317395"}, {"kind": "Video", "id": "x8e48b09e"}, {"kind": "Video", "id": "xa05fa4cf"}, {"kind": "Video", "id": "23984"}, {"kind": "Video", "id": "xbf40106d"}, {"kind": "Video", "id": "23996"}, {"kind": "Video", "id": "24030"}, {"kind": "Video", "id": "x095221e8"}, {"kind": "Article", "id": "x1e28002c"}, {"kind": "Video", "id": "1077988383"}, {"kind": "Video", "id": "1077809718"}, {"kind": "Video", "id": "1078024276"}], "children": [{"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/transport-across-a-cell-membrane-questions/", "id": "transport-across-a-cell-membrane-questions", "title": "Transport across a cell membrane questions", "description": "Transport across a cell membrane questions", "slug": "transport-across-a-cell-membrane-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/how-do-things-move-across-a-cell-membrane/", "id": "knv4fNNoEG8", "title": "How do things move across a cell membrane?", "kind": "Video", "slug": "how-do-things-move-across-a-cell-membrane"}, {"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/passive-transport-by-facilitated-diffusion/", "id": "ZAbrCJxk8fs", "title": "Passive Transport by Facilitated Diffusion", "kind": "Video", "slug": "passive-transport-by-facilitated-diffusion"}, {"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/diffusion-and-osmosis/", "id": "aubZU0iWtgI", "title": "Diffusion and osmosis", "kind": "Video", "description": "Learn about diffusion, osmosis, and concentration gradients and why these are important to cells.", "slug": "diffusion-and-osmosis"}, {"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/glomerular-filtration-in-the-nephron/", "id": "wWsdcfGta4k", "title": "Glomerular filtration in the nephron", "kind": "Video", "slug": "glomerular-filtration-in-the-nephron"}, {"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/sodium-potassium-pump/", "id": "C_H-ONQFjpQ", "title": "Sodium potassium pump", "kind": "Video", "description": "How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane", "slug": "sodium-potassium-pump"}, {"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/secondary-active-transport-in-the-nephron/", "id": "czY5nyvZ7cU", "title": "Secondary active transport in the nephron", "kind": "Video", "description": "Secondary Active Transport in the Nephron", "slug": "secondary-active-transport-in-the-nephron"}, {"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/endocytosis-and-exocytosis/", "id": "qasm7Mj7CYg", "title": "Endocytosis and Exocytosis", "kind": "Video", "slug": "endocytosis-and-exocytosis"}, {"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/membrane-potentials-part-2/", "id": "eROhIFBGKuU", "title": "Membrane potentials - part 2", "kind": "Video", "description": "Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "membrane-potentials-part-2"}, {"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/membrane-potentials-part-1/", "id": "PtKAeihnbv0", "title": "Membrane potentials - part 1", "kind": "Video", "description": "Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "membrane-potentials-part-1"}, {"path": "khan/test-prep/mcat/cells/transport-across-a-cell-membrane/permeability-and-membrane-potentials/", "id": "920PtNX-WCE", "title": "Permeability and membrane potentials", "kind": "Video", "description": "Find out why a cell that is permeable to multiple ions has a membrane potential that is influenced by the ion with the highest permeability. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "permeability-and-membrane-potentials"}], "in_knowledge_map": false, "description": "2A: Each cell in your body has a \u201cmembrane potential.\u201d Think of it like rolling a ball to the top of a hill - once the ball is at the top, it is smooth sailing down. Similarly, this electric membrane potential allows ions to flow down a gradient of electrical energy (the inside of the cell is negative relative to the outside). We will discuss this concept as well as other mechanisms for movement of ions, water, and other molecules across cellular membranes.", "node_slug": "transport-across-a-cell-membrane", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/transport-across-a-cell-membrane", "extended_slug": "test-prep/mcat/cells/transport-across-a-cell-membrane", "kind": "Topic", "slug": "transport-across-a-cell-membrane"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/cell-theory/", "id": "cell-theory", "hide": false, "title": "Cell theory", "child_data": [{"kind": "Exercise", "id": "xaffd2be5"}, {"kind": "Video", "id": "xf69d6cb8"}], "children": [{"path": "khan/test-prep/mcat/cells/cell-theory/cell-theory-questions/", "id": "cell-theory-questions", "title": "Cell theory questions", "description": "Cell theory questions", "slug": "cell-theory-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/cell-theory/history-and-development-of-cell-theory/", "id": "L3nH3KTNS3E", "title": "History and development of cell theory", "kind": "Video", "slug": "history-and-development-of-cell-theory"}], "in_knowledge_map": false, "description": "Let\u2019s go on a journey that starts with Robert Hooke and Anton van Leeuwenhoek hunched over their microscopes looking at cork and bacteria, respectively. These videos will guide you through the events that led us to the knowledge we have today about cells.", "node_slug": "cell-theory", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/cell-theory", "extended_slug": "test-prep/mcat/cells/cell-theory", "kind": "Topic", "slug": "cell-theory"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/eukaryotic-cells/", "id": "eukaryotic-cells", "hide": false, "title": "Eukaryotic cells", "child_data": [{"kind": "Exercise", "id": "x70a50c20"}, {"kind": "Article", "id": "x02cf8fa9"}, {"kind": "Video", "id": "xdef80168"}, {"kind": "Video", "id": "xce265a8a"}, {"kind": "Video", "id": "x90c8c801"}, {"kind": "Video", "id": "x0411ee0e"}, {"kind": "Video", "id": "x6dba09d9"}, {"kind": "Video", "id": "x194ffe84"}], "children": [{"path": "khan/test-prep/mcat/cells/eukaryotic-cells/eukaryotic-cell-questions/", "id": "eukaryotic-cell-questions", "title": "Eukaryotic cell questions", "description": "Eukaryotic cell questions", "slug": "eukaryotic-cell-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/eukaryotic-cells/characteristics-of-eukaryotic-cells/", "id": "7FN1NBoV2u0", "title": "Characteristics of eukaryotic cells", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "characteristics-of-eukaryotic-cells"}, {"path": "khan/test-prep/mcat/cells/eukaryotic-cells/the-nucleus/", "id": "gGeC0ntvxR8", "title": "The nucleus", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-nucleus"}, {"path": "khan/test-prep/mcat/cells/eukaryotic-cells/mitochondria/", "id": "K7IxN3EDqm4", "title": "Mitochondria", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "mitochondria"}, {"path": "khan/test-prep/mcat/cells/eukaryotic-cells/endoplasmic-reticulum-and-golgi-apparatus/", "id": "jDadorSbhi4", "title": "Endoplasmic reticulum and golgi apparatus", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "endoplasmic-reticulum-and-golgi-apparatus"}, {"path": "khan/test-prep/mcat/cells/eukaryotic-cells/lysosomes-and-peroxisomes/", "id": "OZdmaf2R9ys", "title": "Lysosomes and peroxisomes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "lysosomes-and-peroxisomes"}, {"path": "khan/test-prep/mcat/cells/eukaryotic-cells/epithelial-and-connective-tissue/", "id": "sKins25SEVk", "title": "Epithelial and connective tissue", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "epithelial-and-connective-tissue"}], "in_knowledge_map": false, "description": "Unlike prokaryotes, eukaryotic cells have a nucleus and other membrane-bound organelles that allow the cell to compartmentalize different functions. These videos will provide an overview of eukaryotic cells and will take you through the structures and functions of the various organelles found within the plasma membrane.", "node_slug": "eukaryotic-cells", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/eukaryotic-cells", "extended_slug": "test-prep/mcat/cells/eukaryotic-cells", "kind": "Topic", "slug": "eukaryotic-cells"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/cytoskeleton/", "id": "cytoskeleton", "hide": false, "title": "Cytoskeleton", "child_data": [{"kind": "Exercise", "id": "x2144a296"}, {"kind": "Video", "id": "xf047dc12"}, {"kind": "Video", "id": "x99e95f87"}, {"kind": "Video", "id": "xb644781e"}], "children": [{"path": "khan/test-prep/mcat/cells/cytoskeleton/cytoskeleton-questions/", "id": "cytoskeleton-questions", "title": "Cytoskeleton Questions", "description": "Questions pertaining to Cytoskeleton", "slug": "cytoskeleton-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/cytoskeleton/introduction-to-cytoskeleton/", "id": "oIrnecBfHzg", "title": "Introduction to cytoskeleton", "kind": "Video", "slug": "introduction-to-cytoskeleton"}, {"path": "khan/test-prep/mcat/cells/cytoskeleton/microfilaments-and-intermediate-filaments-2/", "id": "pyEVmWLOePw", "title": "Microfilaments and intermediate filaments", "kind": "Video", "slug": "microfilaments-and-intermediate-filaments-2"}, {"path": "khan/test-prep/mcat/cells/cytoskeleton/microtubules-2/", "id": "-qV__tYb4c4", "title": "Microtubules", "kind": "Video", "slug": "microtubules-2"}], "in_knowledge_map": false, "description": "The cytoskeleton provides an internal framework for the cell, much like our skeleton helps support our body. In these videos, you will learn about the different filaments that comprise the cytoskeleton, and how these filaments provide structural support, create roadways for intracellular transport, and generate cellular motion.", "node_slug": "cytoskeleton", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/cytoskeleton", "extended_slug": "test-prep/mcat/cells/cytoskeleton", "kind": "Topic", "slug": "cytoskeleton"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/prokaryotes-bacteria/", "id": "prokaryotes-bacteria", "hide": false, "title": "Prokaryotes/bacteria", "child_data": [{"kind": "Exercise", "id": "xfe393894"}, {"kind": "Video", "id": "x607444b6"}, {"kind": "Video", "id": "x70e3516f"}, {"kind": "Video", "id": "x16becc6b"}, {"kind": "Video", "id": "x60fd4919"}], "children": [{"path": "khan/test-prep/mcat/cells/prokaryotes-bacteria/prokaryotes-questions/", "id": "prokaryotes-questions", "title": "Prokaryotes Questions", "description": "Questions pertaining to Prokaryotes", "slug": "prokaryotes-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/prokaryotes-bacteria/overview-of-archaea-protista-and-bacteria/", "id": "cN5jQ7sQMn0", "title": "Overview of Archaea, Protista, and Bacteria", "kind": "Video", "slug": "overview-of-archaea-protista-and-bacteria"}, {"path": "khan/test-prep/mcat/cells/prokaryotes-bacteria/bacterial-characteristics-gram-staining/", "id": "FgsgpoFhleA", "title": "Bacterial characteristics - Gram staining", "kind": "Video", "slug": "bacterial-characteristics-gram-staining"}, {"path": "khan/test-prep/mcat/cells/prokaryotes-bacteria/bacterial-reproduction-bacterial-growth-curve/", "id": "1lvyCZsP_Sw", "title": "Bacterial reproduction - Bacterial growth curve", "kind": "Video", "slug": "bacterial-reproduction-bacterial-growth-curve"}, {"path": "khan/test-prep/mcat/cells/prokaryotes-bacteria/bacterial-genetic-recombination/", "id": "VBf3plXRonw", "title": "Bacterial genetic recombination", "kind": "Video", "slug": "bacterial-genetic-recombination"}], "in_knowledge_map": false, "description": "When you think about prokaryotes, disease-causing bacteria might come to mind. However, most prokaryotes are not harmful. Prokaryotes live symbiotically with many plants and animals and are key players in the global ecosystem. They are incredibly diverse and are found in the most extreme of environments. These videos will take you through a general overview of these amazing organisms.", "node_slug": "prokaryotes-bacteria", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/prokaryotes-bacteria", "extended_slug": "test-prep/mcat/cells/prokaryotes-bacteria", "kind": "Topic", "slug": "prokaryotes-bacteria"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/viruses/", "id": "viruses", "hide": false, "title": "Viruses", "child_data": [{"kind": "Exercise", "id": "x6a58ff1e"}, {"kind": "Article", "id": "x5e3e46e4"}, {"kind": "Video", "id": "x413f8189"}, {"kind": "Video", "id": "xa24e8e74"}, {"kind": "Video", "id": "xa3a3b196"}, {"kind": "Video", "id": "x3bbe9fa1"}], "children": [{"path": "khan/test-prep/mcat/cells/viruses/virus-structure-and-reproductive-cycle-questions/", "id": "virus-structure-and-reproductive-cycle-questions", "title": "Virus structure and reproductive cycle questions", "description": "Questions pertaining to virus structure and reproductive cycle", "slug": "virus-structure-and-reproductive-cycle-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/viruses/virus-structure-and-classification/", "id": "4kIKySxUYuk", "title": "Virus structure and classification", "kind": "Video", "slug": "virus-structure-and-classification"}, {"path": "khan/test-prep/mcat/cells/viruses/viral-replicaiton-lytic-vs-lysogenic/", "id": "J4BN4dARpio", "title": "Viral replication: lytic vs lysogenic", "kind": "Video", "slug": "viral-replicaiton-lytic-vs-lysogenic"}, {"path": "khan/test-prep/mcat/cells/viruses/retroviruses/", "id": "KhdX5eX4dMM", "title": "Retroviruses", "kind": "Video", "slug": "retroviruses"}, {"path": "khan/test-prep/mcat/cells/viruses/subviral-particles-viroids-and-prions/", "id": "qmsWOrQtj4w", "title": "Subviral particles: viroids and prions", "kind": "Video", "slug": "subviral-particles-viroids-and-prions"}], "in_knowledge_map": false, "description": "Viruses can cause sickness and disease, however they are not living entities. If they are not alive, then what are they? In this section, you will learn about the different types of viruses and how they survive, replicate, and spread inside a host organism.", "node_slug": "viruses", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/viruses", "extended_slug": "test-prep/mcat/cells/viruses", "kind": "Topic", "slug": "viruses"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/cellular-division/", "id": "cellular-division", "hide": false, "title": "Cellular division", "child_data": [{"kind": "Exercise", "id": "xd76f1093"}, {"kind": "Video", "id": "x6d2116ce"}, {"kind": "Video", "id": "x4662267b"}, {"kind": "Video", "id": "x49a016da"}, {"kind": "Video", "id": "x49fa677e"}, {"kind": "Video", "id": "x754b170b"}, {"kind": "Article", "id": "x47511ffa"}, {"kind": "Video", "id": "23932"}, {"kind": "Video", "id": "23934"}, {"kind": "Video", "id": "23936"}, {"kind": "Video", "id": "23938"}], "children": [{"path": "khan/test-prep/mcat/cells/cellular-division/cellular-division-questions/", "id": "cellular-division-questions", "title": "Cellular division questions", "description": "Cellular division questions", "slug": "cellular-division-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/cellular-division/cell-cycle-phases/", "id": "U5vAO_f2LDQ", "title": "Cell cycle phases", "kind": "Video", "description": "Learn about the different \"seasons\" of a cell's life and how it grows with time. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "cell-cycle-phases"}, {"path": "khan/test-prep/mcat/cells/cellular-division/cell-cycle-control/", "id": "542CMooowNY", "title": "Cell cycle control", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "cell-cycle-control"}, {"path": "khan/test-prep/mcat/cells/cellular-division/loss-of-cell-cycle-control-in-cancer/", "id": "UgZIULiNRoo", "title": "Loss of cell cycle control in cancer", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "loss-of-cell-cycle-control-in-cancer"}, {"path": "khan/test-prep/mcat/cells/cellular-division/fertilization-haploid-diploid-gamete-zygote-homologous/", "id": "dNp7vErqlaA", "title": "Fertilization terminology: gametes, zygotes, haploid and diploid", "kind": "Video", "slug": "fertilization-haploid-diploid-gamete-zygote-homologous"}, {"path": "khan/test-prep/mcat/cells/cellular-division/somatic-germ-cells/", "id": "PvoigrzODdE", "title": "Zygote differentiating into somatic and germ cells", "kind": "Video", "slug": "somatic-germ-cells"}, {"path": "khan/test-prep/mcat/cells/cellular-division/phases-of-mitosis/", "id": "LLKX_4DHE3I", "title": "Phases of mitosis", "kind": "Video", "description": "Explanation of the phases of mitosis.", "slug": "phases-of-mitosis"}, {"path": "khan/test-prep/mcat/cells/cellular-division/phases-of-meiosis/", "id": "ijLc52LmFQg", "title": "Phases of meiosis", "kind": "Video", "description": "The phases of Meiosis.", "slug": "phases-of-meiosis"}, {"path": "khan/test-prep/mcat/cells/cellular-division/embryonic-stem-cells/", "id": "-yCIMk1x0Pk", "title": "Embryonic stem cells", "kind": "Video", "description": "An overview of early development of a zygote to an embryo. Embryonic and somatic stem cells.", "slug": "embryonic-stem-cells"}, {"path": "khan/test-prep/mcat/cells/cellular-division/cancer/", "id": "RZhL7LDPk8w", "title": "Cancer", "kind": "Video", "description": "An introduction to what cancer is and how it is the by-product of broken DNA replication", "slug": "cancer"}], "in_knowledge_map": false, "description": "", "node_slug": "cellular-division", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/cellular-division", "extended_slug": "test-prep/mcat/cells/cellular-division", "kind": "Topic", "slug": "cellular-division"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/cellular-development/", "id": "cellular-development", "hide": false, "title": "Cellular development", "child_data": [{"kind": "Exercise", "id": "x43d574ca"}, {"kind": "Video", "id": "x2a7ce386"}, {"kind": "Video", "id": "x0f31c982"}, {"kind": "Video", "id": "x08a677c2"}, {"kind": "Video", "id": "xb0aae61c"}, {"kind": "Video", "id": "x721dc3db"}, {"kind": "Video", "id": "x33fd3fc5"}], "children": [{"path": "khan/test-prep/mcat/cells/cellular-development/cellular-development-questions/", "id": "cellular-development-questions", "title": "Cellular development questions", "description": "Questions pertaining to cellular development", "slug": "cellular-development-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/cellular-development/stem-cells/", "id": "uUH5YI5dTOg", "title": "Stem cells", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "stem-cells"}, {"path": "khan/test-prep/mcat/cells/cellular-development/cellular-communication/", "id": "5MoIg5lWLXA", "title": "Cellular communication", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "cellular-communication"}, {"path": "khan/test-prep/mcat/cells/cellular-development/mitochondria-apoptosis-and-oxidative-stress/", "id": "0v1C5x1ALI8", "title": "Mitochondria, apoptosis, and oxidative stress", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "mitochondria-apoptosis-and-oxidative-stress"}, {"path": "khan/test-prep/mcat/cells/cellular-development/cellular-specialization-differentiation/", "id": "YtvL-LQlPrU", "title": "Cellular specialization (differentiation)", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "cellular-specialization-differentiation"}, {"path": "khan/test-prep/mcat/cells/cellular-development/telomeres-and-cell-senescence/", "id": "R5YiO6rKr-w", "title": "Telomeres and cell senescence", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "telomeres-and-cell-senescence"}, {"path": "khan/test-prep/mcat/cells/cellular-development/cellular-movement/", "id": "FD-A0MhYc7Y", "title": "Cellular movement", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "cellular-movement"}], "in_knowledge_map": false, "description": "What is the difference between a heart cell and a liver cell? Not only do they look different, but they obviously have different roles in our bodies. Yet, both of these cells have the same 23 chromosomes in their nuclei, so shouldn\u2019t they be similar? These videos explain why a heart cell becomes a heart cell and not a liver cell.", "node_slug": "cellular-development", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/cellular-development", "extended_slug": "test-prep/mcat/cells/cellular-development", "kind": "Topic", "slug": "cellular-development"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/cells/embryology/", "id": "embryology", "hide": false, "title": "Embryology", "child_data": [{"kind": "Exercise", "id": "x483b5487"}, {"kind": "Exercise", "id": "xa507ee07"}, {"kind": "Article", "id": "x4df235b2"}, {"kind": "Video", "id": "x775087f6"}, {"kind": "Article", "id": "x4fdf0b7b"}, {"kind": "Video", "id": "x64e1d5b5"}, {"kind": "Video", "id": "x99609191"}, {"kind": "Video", "id": "xbbba6969"}, {"kind": "Video", "id": "x6e7f0f8f"}], "children": [{"path": "khan/test-prep/mcat/cells/embryology/embryology-questions/", "id": "embryology-questions", "title": "Embryology questions", "description": "Questions pertaining to Embryology", "slug": "embryology-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/embryology/embryology-question/", "id": "embryology-question", "title": "Embryology questions 2", "description": "Questions pertaining to embryology", "slug": "embryology-question", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/cells/embryology/egg-sperm-and-fertilization/", "id": "7ww5T7hCdn4", "title": "Egg, sperm, and fertilization", "kind": "Video", "slug": "egg-sperm-and-fertilization"}, {"path": "khan/test-prep/mcat/cells/embryology/early-embryogenesis-cleavage-blastulation-gastrulation-and-neurulation/", "id": "dAOWQC-OBv0", "title": "Early embryogenesis - Cleavage, blastulation, gastrulation, and neurulation", "kind": "Video", "slug": "early-embryogenesis-cleavage-blastulation-gastrulation-and-neurulation"}, {"path": "khan/test-prep/mcat/cells/embryology/implantation/", "id": "1KL8HAm3uSY", "title": "Implantation", "kind": "Video", "slug": "implantation"}, {"path": "khan/test-prep/mcat/cells/embryology/gestation/", "id": "_-1m1GsuH1M", "title": "Gestation", "kind": "Video", "slug": "gestation"}, {"path": "khan/test-prep/mcat/cells/embryology/germ-layer-derivatives/", "id": "QPvhl66QCqo", "title": "Germ layer derivatives", "kind": "Video", "slug": "germ-layer-derivatives"}], "in_knowledge_map": false, "description": "Do you remember when you were just a sperm and an egg, or when you were just made up of 32 cells, or when you were a blastocyst attaching to your mom\u2019s uterus? These videos should help jog your memory about the nine months before you came into this world as an human being.", "node_slug": "embryology", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/cells/embryology", "extended_slug": "test-prep/mcat/cells/embryology", "kind": "Topic", "slug": "embryology"}], "in_knowledge_map": false, "description": "Foundational Concept 2: Highly-organized assemblies of molecules, cells, and organs interact to carry out the functions of living organisms", "node_slug": "cells", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/cells", "extended_slug": "test-prep/mcat/cells", "kind": "Topic", "slug": "cells"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/", "id": "organ-systems", "hide": false, "title": "Organ systems", "child_data": [{"kind": "Topic", "id": "x0c3e8dc7"}, {"kind": "Topic", "id": "x31422879"}, {"kind": "Topic", "id": "x7c95d8f9"}, {"kind": "Topic", "id": "xd4dd3ca0"}, {"kind": "Topic", "id": "x4bc53d4c"}, {"kind": "Topic", "id": "x45af1f03"}, {"kind": "Topic", "id": "xdc49b351"}, {"kind": "Topic", "id": "x874c4adb"}, {"kind": "Topic", "id": "x387a1e80"}, {"kind": "Topic", "id": "xe2dc4d2f"}, {"kind": "Topic", "id": "xaf8f6e5c"}, {"kind": "Topic", "id": "x6fa55de4"}, {"kind": "Topic", "id": "x3adf8b8b"}, {"kind": "Topic", "id": "x91e58a11"}, {"kind": "Topic", "id": "xf089c70c"}, {"kind": "Topic", "id": "x9bca6ee7"}, {"kind": "Topic", "id": "xbfecb499"}, {"kind": "Topic", "id": "x98456b18"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/", "id": "biological basis of behavior the nervous system", "hide": false, "title": "Biological basis of behavior: The nervous system", "child_data": [{"kind": "Exercise", "id": "x97c4d924"}, {"kind": "Video", "id": "xc550a5c4"}, {"kind": "Video", "id": "x5b1e791e"}, {"kind": "Video", "id": "xa9b71784"}, {"kind": "Video", "id": "xa82be47f"}, {"kind": "Video", "id": "xedf571fd"}, {"kind": "Video", "id": "xb67fb1c0"}, {"kind": "Video", "id": "xcf330c2e"}, {"kind": "Video", "id": "x4125f8d9"}, {"kind": "Video", "id": "xfef2f16a"}, {"kind": "Video", "id": "xef6206dc"}, {"kind": "Video", "id": "x6fa54c20"}, {"kind": "Video", "id": "x484d10c3"}, {"kind": "Video", "id": "xff5c3e85"}, {"kind": "Video", "id": "x68d2cd26"}, {"kind": "Video", "id": "x36b61007"}, {"kind": "Video", "id": "x7840b478"}, {"kind": "Video", "id": "x12aba748"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/nervous-system-questions/", "id": "nervous-system-questions", "title": "Nervous system questions", "description": "Nervous system questions", "slug": "nervous-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/structure-of-the-nervous-system/", "id": "jmD0LBdAvlE", "title": "Structure of the nervous system", "kind": "Video", "slug": "structure-of-the-nervous-system"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/functions-of-the-nervous-system/", "id": "qrK-FBdjGk4", "title": "Functions of the nervous system", "kind": "Video", "slug": "functions-of-the-nervous-system"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/motor-unit/", "id": "vXb0ZvkFkS8", "title": "Motor unit", "kind": "Video", "slug": "motor-unit"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/peripheral-somatosensation/", "id": "oOIqk5hXBt4", "title": "Peripheral somatosensation", "kind": "Video", "slug": "peripheral-somatosensation"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/muscle-stretch-reflex/", "id": "Ya-3XHBWDqs", "title": "Muscle stretch reflex", "kind": "Video", "slug": "muscle-stretch-reflex"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/autonomic-nervous-system/", "id": "jA1NyCE4M2g", "title": "Autonomic nervous system", "kind": "Video", "slug": "autonomic-nervous-system"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/gray-and-white-matter/", "id": "ZZQzMeFoZY0", "title": "Gray and white matter", "kind": "Video", "slug": "gray-and-white-matter"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/upper-motor-neurons/", "id": "aASSUcUSBro", "title": "Upper motor neurons", "kind": "Video", "slug": "upper-motor-neurons"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/somatosensory-tracts/", "id": "vrmKqH8d1RM", "title": "Somatosensory tracts", "kind": "Video", "slug": "somatosensory-tracts"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/cerebellum/", "id": "xf1okjCwdOg", "title": "Cerebellum", "kind": "Video", "slug": "cerebellum"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/brainstem/", "id": "MxDP1B5mKWA", "title": "Brainstem", "kind": "Video", "slug": "brainstem"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/subcortical-cerebrum/", "id": "A_2f3onF3S8", "title": "Subcortical cerebrum", "kind": "Video", "slug": "subcortical-cerebrum"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/cerebral-cortex/", "id": "mGxomKWfJXs", "title": "Cerebral cortex", "kind": "Video", "slug": "cerebral-cortex"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/neurotransmitter-anatomy/", "id": "fYUpLvM5X7A", "title": "Neurotransmitter anatomy", "kind": "Video", "slug": "neurotransmitter-anatomy"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/early-methods-of-studying-the-brain/", "id": "vMTe6qXUHVs", "title": "Early methods of studying the brain", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "early-methods-of-studying-the-brain"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/lesion-studies-and-experimental-ablation/", "id": "haidlj3cTAA", "title": "Lesion studies and experimental ablation", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "lesion-studies-and-experimental-ablation"}, {"path": "khan/test-prep/mcat/organ-systems/biological-basis-of-behavior-the-nervous-system/modern-ways-of-studying-the-brain/", "id": "hCFtl4npukU", "title": "Modern ways of studying the brain", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "modern-ways-of-studying-the-brain"}], "in_knowledge_map": false, "description": "3A: The very fact that you are able to understand this sentence means that neurons in your brain (85 billion in total) are talking to each other. Neurons are the living substance of the nervous system, which extends beyond the brain to the spinal cord and peripherally, allows you to think and process, make decisions, stand up straight, maintain your heart rate, rest and digest. You will come to appreciate the structure and function of the nervous system as we delve into its anatomy and physiology, from the gray and white matter to the cerebellum to the neurons.", "node_slug": "biological basis of behavior the nervous system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/biological basis of behavior the nervous system", "extended_slug": "test-prep/mcat/organ-systems/biological basis of behavior the nervous system", "kind": "Topic", "slug": "biological-basis-of-behavior-the-nervous-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/neural-cells/", "id": "neural-cells", "hide": false, "title": "Neural cells", "child_data": [{"kind": "Exercise", "id": "xe8808ebd"}, {"kind": "Video", "id": "xcbff8238"}, {"kind": "Video", "id": "x34e8d04e"}, {"kind": "Video", "id": "x7a518014"}, {"kind": "Video", "id": "x8c4fa549"}, {"kind": "Video", "id": "x5fc44899"}, {"kind": "Video", "id": "x57d1f66b"}, {"kind": "Video", "id": "x0d5e3691"}, {"kind": "Video", "id": "xbe97865f"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/neural-cells/neural-cells-questions/", "id": "neural-cells-questions", "title": "Neural cells questions", "description": "Neural cells questions", "slug": "neural-cells-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/neural-cells/introduction-to-neural-cell-types/", "id": "L82bDTBMGUU", "title": "Introduction to neural cell types", "kind": "Video", "description": "This video provides an introduction to the cell types of the nervous system. By Matt Jensen.", "slug": "introduction-to-neural-cell-types"}, {"path": "khan/test-prep/mcat/organ-systems/neural-cells/overview-of-neuron-structure/", "id": "1h4kW8RX-6k", "title": "Overview of neuron structure", "kind": "Video", "description": "This video introduces the structure and structural types of neurons.\u00a0 By Matt Jensen.", "slug": "overview-of-neuron-structure"}, {"path": "khan/test-prep/mcat/organ-systems/neural-cells/overview-of-neuron-function/", "id": "BY8DJeX_tGc", "title": "Overview of neuron function", "kind": "Video", "description": "This video introduces the function and functional types of neurons.\u00a0 By Matt Jensen.", "slug": "overview-of-neuron-function"}, {"path": "khan/test-prep/mcat/organ-systems/neural-cells/astrocytes/", "id": "rfepM3L7Pqc", "title": "Astrocytes", "kind": "Video", "description": "This video describes the structure and function of astrocytes. By Matt Jensen.", "slug": "astrocytes"}, {"path": "khan/test-prep/mcat/organ-systems/neural-cells/microglia/", "id": "mw-rwhpAQe4", "title": "Microglia", "kind": "Video", "description": "This video describes the structure and function of microglia.\u00a0 By Matt Jensen.", "slug": "microglia"}, {"path": "khan/test-prep/mcat/organ-systems/neural-cells/ependymal-cells/", "id": "PpvexFbd8e8", "title": "Ependymal cells", "kind": "Video", "description": "This video describes the structure and function of ependymal cells.\u00a0 By Matt Jensen.", "slug": "ependymal-cells"}, {"path": "khan/test-prep/mcat/organ-systems/neural-cells/oligodendrocytes/", "id": "jMXf2lgddOg", "title": "Oligodendrocytes", "kind": "Video", "description": "This video describes the structure and function of oligodendrocytes.\u00a0 By Matt Jensen.", "slug": "oligodendrocytes"}, {"path": "khan/test-prep/mcat/organ-systems/neural-cells/schwann-cells/", "id": "XmL7RHouyUo", "title": "Schwann cells", "kind": "Video", "description": "This video describes the structure and function of Schwann cells.\u00a0 By Matt Jensen.", "slug": "schwann-cells"}], "in_knowledge_map": false, "description": "3A: Neurons transmit information to one another through electrochemical signals. They make up the motor nerves that allow you to type an essay, the sensory nerves that let you feel a fluffy dog, and your brain, allowing to remember the content of this module. They have a number of helper cells, ranging from astrocytes, to microglia, to ependymal cells as well. You will come to appreciate the structure and function of neurons and the comrade cells which help to maintain the optimal function of the nervous system.", "node_slug": "neural-cells", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/neural-cells", "extended_slug": "test-prep/mcat/organ-systems/neural-cells", "kind": "Topic", "slug": "neural-cells"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/", "id": "neuron-membrane-potentials", "hide": false, "title": "Neuron membrane potentials", "child_data": [{"kind": "Exercise", "id": "xfb030a0c"}, {"kind": "Exercise", "id": "x54b13650"}, {"kind": "Article", "id": "x84565b80"}, {"kind": "Article", "id": "xda71f258"}, {"kind": "Video", "id": "x5358cfa6"}, {"kind": "Video", "id": "x1066c8b0"}, {"kind": "Video", "id": "x4bfcc978"}, {"kind": "Video", "id": "x8404c066"}, {"kind": "Video", "id": "xf5a47394"}, {"kind": "Video", "id": "x62bebb4e"}, {"kind": "Video", "id": "x810b045c"}, {"kind": "Video", "id": "x2db717e3"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/neuron-membrane-potentials-questions/", "id": "neuron-membrane-potentials-questions", "title": "Neuron membrane potentials questions", "description": "Neuron membrane potentials questions", "slug": "neuron-membrane-potentials-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/neuron-membrane-potentials-questions-2/", "id": "neuron-membrane-potentials-questions-2", "title": "Neuron membrane potentials questions 2", "description": "Questions pertaining to neuron membrane potentials", "slug": "neuron-membrane-potentials-questions-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/neuron-graded-potential-description/", "id": "AQr0rNyUnFM", "title": "Neuron graded potential description", "kind": "Video", "slug": "neuron-graded-potential-description"}, {"path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/neuron-resting-potential-description/", "id": "4htSVI5E9AQ", "title": "Neuron resting potential description", "kind": "Video", "slug": "neuron-resting-potential-description"}, {"path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/neuron-resting-potential-mechanism/", "id": "l3ngsl7FhTc", "title": "Neuron resting potential mechanism", "kind": "Video", "slug": "neuron-resting-potential-mechanism"}, {"path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/neuron-graded-potential-mechanism/", "id": "NaAwVrOEyss", "title": "Neuron graded potential mechanism", "kind": "Video", "slug": "neuron-graded-potential-mechanism"}, {"path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/neuron-action-potential-description/", "id": "h2H6POZowiU", "title": "Neuron action potential description", "kind": "Video", "slug": "neuron-action-potential-description"}, {"path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/neuron-action-potential-mechanism/", "id": "MZz4OUOyFvg", "title": "Neuron action potential mechanism", "kind": "Video", "slug": "neuron-action-potential-mechanism"}, {"path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/effects-of-axon-diameter-and-myelination/", "id": "_Lj_F9GADa4", "title": "Effects of axon diameter and myelination", "kind": "Video", "slug": "effects-of-axon-diameter-and-myelination"}, {"path": "khan/test-prep/mcat/organ-systems/neuron-membrane-potentials/action-potential-patterns/", "id": "jM-gvSqsP5A", "title": "Action potential patterns", "kind": "Video", "slug": "action-potential-patterns"}], "in_knowledge_map": false, "description": "3A: As you visually process this webpage, countless action potentials are taking place across the neurons in the occipital lobe of your brain. An action potential is an extremely quick change in the membrane potential of the neuron that can propagate toward other neurons. It\u2019s like one neuron is telling another neuron \u201cHey, wake up! We have work to do!\u201d You will soon gain an appreciation for the mechanism of the action potential, which allows for communication between neurons of all flavors in your body- from those responsible for the maintenance of memory to those functioning in sensation.", "node_slug": "neuron-membrane-potentials", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/neuron-membrane-potentials", "extended_slug": "test-prep/mcat/organ-systems/neuron-membrane-potentials", "kind": "Topic", "slug": "neuron-membrane-potentials"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/neural-synapses/", "id": "neural-synapses", "hide": false, "title": "Neuronal synapses", "child_data": [{"kind": "Exercise", "id": "x2ca0a07d"}, {"kind": "Article", "id": "x33dc4ce5"}, {"kind": "Video", "id": "x078b055b"}, {"kind": "Video", "id": "xf45480de"}, {"kind": "Video", "id": "x0adae408"}, {"kind": "Video", "id": "x87ddf0ff"}, {"kind": "Video", "id": "x305db132"}, {"kind": "Video", "id": "x3d2e6106"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/neural-synapses/neuronal-synapses-questions/", "id": "neuronal-synapses-questions", "title": "Neuronal synapses questions", "description": "Neuronal synapses questions", "slug": "neuronal-synapses-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/neural-synapses/synapse-structure/", "id": "iqf3ft0mh1M", "title": "Synapse structure", "kind": "Video", "slug": "synapse-structure"}, {"path": "khan/test-prep/mcat/organ-systems/neural-synapses/neurotransmitter-release/", "id": "Ac-Npt3vgCE", "title": "Neurotransmitter release", "kind": "Video", "slug": "neurotransmitter-release"}, {"path": "khan/test-prep/mcat/organ-systems/neural-synapses/types-of-neurotransmitters/", "id": "FXYX_ksRwIk", "title": "Types of neurotransmitters", "kind": "Video", "slug": "types-of-neurotransmitters"}, {"path": "khan/test-prep/mcat/organ-systems/neural-synapses/types-of-neurotransmitter-receptors/", "id": "yg44T2HcA2o", "title": "Types of neurotransmitter receptors", "kind": "Video", "slug": "types-of-neurotransmitter-receptors"}, {"path": "khan/test-prep/mcat/organ-systems/neural-synapses/neurotransmitter-removal/", "id": "FO10z7FX13c", "title": "Neurotransmitter removal", "kind": "Video", "slug": "neurotransmitter-removal"}, {"path": "khan/test-prep/mcat/organ-systems/neural-synapses/neuroplasticity/", "id": "J8wW1t1JqUc", "title": "Neuroplasticity", "kind": "Video", "slug": "neuroplasticity"}], "in_knowledge_map": false, "description": "3A: Synapses are the means by which neurons, just like other cells of the body, communicate with each other as well as other cells, like muscles and glands. They are the equivalent of neural telephone lines allowing for the transmission of a neurotransmitter, that is, the message. Thus, you are able to tell a dog from a cat. and a ball from a rock. Without all this cross-talk, you might look at an object without truly seeing or hear a sound without actually listening.", "node_slug": "neural-synapses", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/neural-synapses", "extended_slug": "test-prep/mcat/organ-systems/neural-synapses", "kind": "Topic", "slug": "neural-synapses"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/biosignaling/", "id": "biosignaling", "hide": false, "title": "Biosignaling", "child_data": [{"kind": "Exercise", "id": "xdec1d13d"}, {"kind": "Video", "id": "x6589e16e"}, {"kind": "Video", "id": "xbc73c884"}, {"kind": "Video", "id": "x7e31c319"}, {"kind": "Video", "id": "xd63ac3ee"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/biosignaling/biosignaling-questions/", "id": "biosignaling-questions", "title": "Biosignaling questions", "description": "Biosignaling questions", "slug": "biosignaling-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/biosignaling/membrane-receptors/", "id": "8Otn9DVkm-g", "title": "Membrane Receptors", "kind": "Video", "description": "Learn about how membrane receptors work in our body.", "slug": "membrane-receptors"}, {"path": "khan/test-prep/mcat/organ-systems/biosignaling/ligand-gated-ion-channels/", "id": "Pl7nzXaVqak", "title": "Ligand Gated Ion Channels", "kind": "Video", "description": "Learn about how ligand gated ion channels work in the cell membrane.", "slug": "ligand-gated-ion-channels"}, {"path": "khan/test-prep/mcat/organ-systems/biosignaling/g-protein-coupled-receptors/", "id": "ZBSo_GFN3qI", "title": "G Protein Coupled Receptors", "kind": "Video", "description": "Learn about how g protein coupled receptors work in the cell membrane.", "slug": "g-protein-coupled-receptors"}, {"path": "khan/test-prep/mcat/organ-systems/biosignaling/enzyme-linked-receptors/", "id": "kaoRrzakjGE", "title": "Enzyme Linked Receptors", "kind": "Video", "description": "Learn about how enzyme linked receptors, particularly Receptor Tyrosine Kinases, work in the body.", "slug": "enzyme-linked-receptors"}], "in_knowledge_map": false, "description": "3A: The human body is composed of about 100 trillion cells (this is not counting your bacterial buddies, who actually outnumber your cells 10 to 1!) Your cells must speak to each other to coordinate this massive symphony of life. In this tutorial, you will learn about the molecular basis of cellular signaling that makes this vast network speedy and efficient.", "node_slug": "biosignaling", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/biosignaling", "extended_slug": "test-prep/mcat/organ-systems/biosignaling", "kind": "Topic", "slug": "biosignaling"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/endocrine-system/", "id": "endocrine-system", "hide": false, "title": "Endocrine system", "child_data": [{"kind": "Exercise", "id": "xe1598fd3"}, {"kind": "Exercise", "id": "x993cf2da"}, {"kind": "Video", "id": "xaf2ad25b"}, {"kind": "Video", "id": "x26e9c294"}, {"kind": "Video", "id": "xcdd0a401"}, {"kind": "Video", "id": "x9ff1d77e"}, {"kind": "Video", "id": "xd4489fab"}, {"kind": "Video", "id": "x9f41189c"}, {"kind": "Video", "id": "xada599e1"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/endocrine-system/endocrine-system-questions-1/", "id": "endocrine-system-questions-1", "title": "Endocrine system questions 1", "description": "Endocrine system questions 1", "slug": "endocrine-system-questions-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/endocrine-system/endocrine-system-questions-2/", "id": "endocrine-system-questions-2", "title": "Endocrine system questions 2", "description": "Endocrine system questions 2", "slug": "endocrine-system-questions-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/endocrine-system/endocrine-gland-hormone-review/", "id": "ER49EweKwW8", "title": "Endocrine gland hormone review", "kind": "Video", "description": "Welcome to the Endocrine System. Get ready to learn about one of the most important ways that our body parts communicate! By Ryan Patton.", "slug": "endocrine-gland-hormone-review"}, {"path": "khan/test-prep/mcat/organ-systems/endocrine-system/hypothalamus-and-pituitary-gland/", "id": "9dS7bc_2bUE", "title": "The hypothalamus and pituitary gland", "kind": "Video", "description": "What makes the endocrine organs tick? Find out in this video about the hypothalamus and pituitary glands! \u00a0By Ryan Patton.", "slug": "hypothalamus-and-pituitary-gland"}, {"path": "khan/test-prep/mcat/organ-systems/endocrine-system/hormone-concentration-metabolism-negative-feedback/", "id": "RycF0ub2Al0", "title": "Hormone concentration metabolism and negative feedback", "kind": "Video", "description": "In this video we're going to learn about how the concentration of hormones in our blood is regulated. By Ryan Patton.", "slug": "hormone-concentration-metabolism-negative-feedback"}, {"path": "khan/test-prep/mcat/organ-systems/endocrine-system/types-of-hormones/", "id": "KSclrkk_Ako", "title": "Types of hormones", "kind": "Video", "description": "There are three major types of hormones, based on structure, in our body. Lets find out a little more about them. By Ryan Patton.", "slug": "types-of-hormones"}, {"path": "khan/test-prep/mcat/organ-systems/endocrine-system/cellular-mechanism-hormone-action/", "id": "TNGSzt2v4xY", "title": "Cellular mechanism of hormone action", "kind": "Video", "description": "Learn about the interaction between chemical messages and their target cells in this video about hormone action. By Ryan Patton.", "slug": "cellular-mechanism-hormone-action"}, {"path": "khan/test-prep/mcat/organ-systems/endocrine-system/terpenes-to-steroids1/", "id": "ywfxY9UDRo4", "title": "From terpenes to steroids part 1: Terpenes", "kind": "Video", "description": "Steroids have to come from somewhere, right? Let's learn about the carbon building blocks with which steroids are made. By Ryan Patton.", "slug": "terpenes-to-steroids1"}, {"path": "khan/test-prep/mcat/organ-systems/endocrine-system/terpenes-to-steroids2/", "id": "x9wyOYnot7E", "title": "From terpenes to steroids part 2: Squalene, cholesterol, and steroids", "kind": "Video", "description": "After learning about terpenes, lets see how are body uses them to eventually make all the steroid hormones of our body. By Ryan Patton.", "slug": "terpenes-to-steroids2"}], "in_knowledge_map": false, "description": "3A: Glands are special organs that secrete chemical messages called hormones, which seep into the blood - it\u2019s like putting a tea bag in hot water. As the heart pumps, this blood carries these chemical messages throughout the body, allowing the hormones to interact with specific target cells and organs. Endocrine glands help us to maintain our appetites, grow up, metabolize molecules, concentrate urine,- and oh, so much more! We will examine how these variegated hormones play a role in homeostasis as the body responds to a changing environment.", "node_slug": "endocrine-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/endocrine-system", "extended_slug": "test-prep/mcat/organ-systems/endocrine-system", "kind": "Topic", "slug": "endocrine-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/", "id": "the-circulatory-system", "hide": false, "title": "Circulatory system", "child_data": [{"kind": "Exercise", "id": "xf9141e2f"}, {"kind": "Video", "id": "1081136975"}, {"kind": "Video", "id": "1081260395"}, {"kind": "Video", "id": "1081230475"}, {"kind": "Video", "id": "1192377802"}, {"kind": "Video", "id": "1081112668"}, {"kind": "Video", "id": "1036278079"}, {"kind": "Video", "id": "1036157588"}, {"kind": "Video", "id": "1036250178"}, {"kind": "Video", "id": "1036166642"}, {"kind": "Video", "id": "x0c625f6c"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/circulatory-system-questions/", "id": "circulatory-system-questions", "title": "Circulatory system questions", "description": "Circulatory system questions", "slug": "circulatory-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/meet-the-heart/", "id": "Vi1JK6IYVt8", "title": "Meet the heart!", "kind": "Video", "description": "Find out exactly where the heart rests in your body and what it does. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-heart"}, {"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/layers-of-the-heart/", "id": "bm65xCS5ivo", "title": "Layers of the heart", "kind": "Video", "description": "Take a closer look at the heart, explore some of its interesting features and get to know the three layers that make up the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "layers-of-the-heart"}, {"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/flow-through-the-heart/", "id": "7XaftdE_h60", "title": "Flow through the heart", "kind": "Video", "description": "Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "flow-through-the-heart"}, {"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/two-circulations-in-the-body/", "id": "K57qjYYjgIY", "title": "Two circulations in the body", "kind": "Video", "description": "Learn the difference between the pulmonary and systemic circulatory systems in the body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "two-circulations-in-the-body"}, {"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/lub-dub/", "id": "-4kGMI-qQ3I", "title": "Lub dub", "kind": "Video", "description": "Ever wonder why the heart sounds the way that it does? Opening and closing of heart valves makes the heart rhythm come alive with its lub dub beats... Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "lub-dub"}, {"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/layers-of-a-blood-vessel/", "id": "VMwa6yC3r-s", "title": "Layers of a blood vessel", "kind": "Video", "description": "Remember the 3 key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are all different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "layers-of-a-blood-vessel"}, {"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/arteries-vs-veins-what-s-the-difference/", "id": "7b6LRebCgb4", "title": "Arteries vs. veins - what's the difference?", "kind": "Video", "description": "Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arteries-vs-veins-what-s-the-difference"}, {"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/resistance-in-a-tube/", "id": "8X7yEzgurP8", "title": "Resistance in a tube", "kind": "Video", "description": "Learn how the size of a tube (it's radius) is related to its resistance to something flowing through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "resistance-in-a-tube"}, {"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/putting-it-all-together-pressure-flow-and-resistance/", "id": "F2uzWHppVrk", "title": "Putting it all together: Pressure, flow, and resistance", "kind": "Video", "description": "See how pressure, flow, and resistance relate to one another and how they each affect the human body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "putting-it-all-together-pressure-flow-and-resistance"}, {"path": "khan/test-prep/mcat/organ-systems/the-circulatory-system/thermoregulation-in-the-circulatory-system/", "id": "C_LiAEjuIIc", "title": "Thermoregulation in the circulatory system", "kind": "Video", "slug": "thermoregulation-in-the-circulatory-system"}], "in_knowledge_map": false, "description": "3B: With every beat, the heart pumps blood throughout the body through an intricate system of blood vessels to provide oxygenation to tissues - from about 4 weeks after conception until the day you die. Over your lifetime, it will pump about 175 million liters of blood (that\u2019s only the amount of water that falls over the Niagara in a few minutes). This little pump in the middle of your chest is only the size of a clenched fist (if you\u2019re an adult), and yet it does so much.", "node_slug": "the-circulatory-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/the-circulatory-system", "extended_slug": "test-prep/mcat/organ-systems/the-circulatory-system", "kind": "Topic", "slug": "the-circulatory-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/hematologic-system/", "id": "hematologic-system", "hide": false, "title": "Hematologic system", "child_data": [{"kind": "Exercise", "id": "x5da83671"}, {"kind": "Video", "id": "1228258123"}, {"kind": "Video", "id": "1228218407"}, {"kind": "Video", "id": "1228432957"}, {"kind": "Video", "id": "x20edc5f4"}, {"kind": "Video", "id": "x5780b274"}, {"kind": "Video", "id": "x6000b8a4"}, {"kind": "Video", "id": "xf7e04c5d"}, {"kind": "Video", "id": "xa549333a"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/hematologic-system/hematologic-system-questions/", "id": "hematologic-system-questions", "title": "Hematologic system questions", "description": "Hematologic system questions", "slug": "hematologic-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/hematologic-system/what-s-inside-of-blood/", "id": "5MOn8X-tyFw", "title": "What's inside of blood?", "kind": "Video", "description": "Spin down your blood and find out what it's made up of. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-s-inside-of-blood"}, {"path": "khan/test-prep/mcat/organ-systems/hematologic-system/hemoglobin-moves-o2-and-co2/", "id": "QP8ImP6NCk8", "title": "Hemoglobin moves O2 and CO2", "kind": "Video", "description": "Learn the two ways that oxygen moves from the lungs to the tissues, and the three ways that carbon dioxide returns from the tissues to the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "hemoglobin-moves-o2-and-co2"}, {"path": "khan/test-prep/mcat/organ-systems/hematologic-system/bohr-effect-vs-haldane-effect/", "id": "dHi9ctwDUnc", "title": "Bohr effect vs. Haldane effect", "kind": "Video", "description": "Take a close look at how some friendly competition for Hemoglobin allows the body to more efficiently move oxygen and carbon Dioxide around. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "bohr-effect-vs-haldane-effect"}, {"path": "khan/test-prep/mcat/organ-systems/hematologic-system/blood-types/", "id": "Nnqp_3HMlDU", "title": "Blood types", "kind": "Video", "slug": "blood-types"}, {"path": "khan/test-prep/mcat/organ-systems/hematologic-system/how-do-we-make-blood-clots/", "id": "RQpBj8ebbNY", "title": "How do we make blood clots?", "kind": "Video", "slug": "how-do-we-make-blood-clots"}, {"path": "khan/test-prep/mcat/organ-systems/hematologic-system/coagulation-cascade/", "id": "FNVvQ788wzk", "title": "Coagulation cascade", "kind": "Video", "slug": "coagulation-cascade"}, {"path": "khan/test-prep/mcat/organ-systems/hematologic-system/the-life-and-times-of-rbcs-and-platelets/", "id": "UBlem4dGLGU", "title": "Life and times of RBCs and platelets", "kind": "Video", "slug": "the-life-and-times-of-rbcs-and-platelets"}, {"path": "khan/test-prep/mcat/organ-systems/hematologic-system/blood-cell-lineages/", "id": "ddifthdMNVc", "title": "Blood cell lineages", "kind": "Video", "slug": "blood-cell-lineages"}], "in_knowledge_map": false, "description": "3B: Roughly 5 L of blood fill your arteries, veins, capillaries, and venules. What\u2019s it good for you ask? It carries oxygen to help your cells carry out respiration in addition to a number of other substances like lipids and hormones throughout the body. In cases of blood loss, such as trauma situations, the physician must be wary of the different blood types. We will explore the intricacies of the hematologic system here.", "node_slug": "hematologic-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/hematologic-system", "extended_slug": "test-prep/mcat/organ-systems/hematologic-system", "kind": "Topic", "slug": "hematologic-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/", "id": "the-respiratory-system", "hide": false, "title": "Respiratory system", "child_data": [{"kind": "Exercise", "id": "x773d49f1"}, {"kind": "Video", "id": "1150539313"}, {"kind": "Video", "id": "1179650621"}, {"kind": "Video", "id": "1179655597"}, {"kind": "Video", "id": "xeab45ce1"}, {"kind": "Video", "id": "x33409079"}, {"kind": "Video", "id": "x0f010548"}, {"kind": "Video", "id": "x536c7d31"}, {"kind": "Video", "id": "x775cfe3b"}, {"kind": "Video", "id": "xc69180a5"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/respiratory-system-questions/", "id": "respiratory-system-questions", "title": "Respiratory system questions", "description": "Respiratory system questions", "slug": "respiratory-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/meet-the-lungs/", "id": "qGiPZf7njqY", "title": "Meet the lungs", "kind": "Video", "description": "Every time you take a breath, oxygen makes it way into your lungs. Follow along on that journey! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-lungs"}, {"path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/inhaling-and-exhaling/", "id": "mykrnTh1tz8", "title": "Inhaling and exhaling", "kind": "Video", "description": "Find out exactly why air goes in and out of the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "inhaling-and-exhaling"}, {"path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/how-does-lung-volume-change/", "id": "dTsUyXXudvA", "title": "How does lung volume change?", "kind": "Video", "description": "Learn about how muscle contraction and lung recoil actually help the lungs change their volume with every breath! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "how-does-lung-volume-change"}, {"path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/o2-and-co2-solubility/", "id": "OCD4Dr3kmmA", "title": "O2 and CO2 solubility", "kind": "Video", "description": "Get an intuition for why carbon dioxide is so much more soluble than oxygen when it goes into water. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "o2-and-co2-solubility"}, {"path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/henry-s-law/", "id": "Wiuat7KdMmA", "title": "Henry's law", "kind": "Video", "description": "Explore the relationship between partial pressure of a gas and the concentration of the gas molecule within a liquid. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "henry-s-law"}, {"path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/fick-s-law-of-diffusion/", "id": "Cg4KlmI_acs", "title": "Fick's law of diffusion", "kind": "Video", "description": "Learn all of the different ways to maximize the amount of particles that diffuse over a short distance over time. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "fick-s-law-of-diffusion"}, {"path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/oxygen-movement-from-alveoli-to-capillaries/", "id": "nRpwdwm06Ic", "title": "Oxygen movement from alveoli to capillaries", "kind": "Video", "description": "Watch as a molecule of oxygen makes its way from the alveoli (gas layer) through various liquid layers in order to end up in the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "oxygen-movement-from-alveoli-to-capillaries"}, {"path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/the-respiratory-center/", "id": "_BFDgTci0ck", "title": "The respiratory center", "kind": "Video", "description": "Find out how the respiratory center collects information from all over the body and then helps regulate your breathing. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-respiratory-center"}, {"path": "khan/test-prep/mcat/organ-systems/the-respiratory-system/thermoregulation-in-the-lungs/", "id": "Iya-2bS14ho", "title": "Thermoregulation in the lungs", "kind": "Video", "slug": "thermoregulation-in-the-lungs"}], "in_knowledge_map": false, "description": "3B: If you place your hand on your ribs and take a deep breath, you\u2019ll notice that your chest expands and your back straightens. As this occurs, air is rushing through your windpipe and branches off to either your left or right lung. After about 20-30 more branch points, oxygen in the air ends up in the alveoli where it diffuses into the surrounding liquid, slipping into the blood. This rapid microscopic gas exchange allows oxygen to be taken up during inhalation as carbon dioxide leaves during exhalation.", "node_slug": "the-respiratory-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/the-respiratory-system", "extended_slug": "test-prep/mcat/organ-systems/the-respiratory-system", "kind": "Topic", "slug": "the-respiratory-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/lymphatic-system/", "id": "lymphatic-system", "hide": false, "title": "Lymphatic system", "child_data": [{"kind": "Exercise", "id": "x35cee70c"}, {"kind": "Video", "id": "xd0841695"}, {"kind": "Video", "id": "xb6494b98"}, {"kind": "Video", "id": "x6b3d6ec8"}, {"kind": "Video", "id": "xefd7202b"}, {"kind": "Video", "id": "xcefa425b"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/lymphatic-system/lymphatic-system-questions/", "id": "lymphatic-system-questions", "title": "Lymphatic system questions", "description": "Lymphatic system questions", "slug": "lymphatic-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/lymphatic-system/why-do-we-need-a-lymphatic-system/", "id": "_GinTV94hUk", "title": "Why we need a lymphatic system", "kind": "Video", "description": "Welcome to the lymphatic system! Find out why we need it, and how it interacts with our blood vessels. By Patrick van Nieuwenhuizen.", "slug": "why-do-we-need-a-lymphatic-system"}, {"path": "khan/test-prep/mcat/organ-systems/lymphatic-system/lymphatic-vessels-move-fluid/", "id": "CLneY6SoPi0", "title": "How lymphatic vessels move fluid", "kind": "Video", "description": "Find out how the body's mysterious second circulatory system works. Learn how it can move fluid even when it has no heart of its own. By Patrick van Nieuwenhuizen.", "slug": "lymphatic-vessels-move-fluid"}, {"path": "khan/test-prep/mcat/organ-systems/lymphatic-system/lymphatic-system-immunity/", "id": "kjLwVqxwaIM", "title": "The lymphatic system's role in immunity", "kind": "Video", "description": "Learn about how B and T cells reside in lymph nodes. Find out how that enables them to get a preview of what they need to be prepared to fight. By Patrick van Nieuwenhuizen.", "slug": "lymphatic-system-immunity"}, {"path": "khan/test-prep/mcat/organ-systems/lymphatic-system/lipid-and-protein-transport-lymphatic-system/", "id": "EHUlWm0kFTA", "title": "Lipid and protein transport in the lymphatic system", "kind": "Video", "description": "Learn about a third function of the lymphatic system. See how it finds a sneaky way to get fats and proteins into your bloodstream. By Patrick van Nieuwenhuizen.", "slug": "lipid-and-protein-transport-lymphatic-system"}, {"path": "khan/test-prep/mcat/organ-systems/lymphatic-system/what-is-lymph/", "id": "2Bq2xopLew8", "title": "What is actually in lymph", "kind": "Video", "description": "Learn about the differences between lymph and blood. Find out what is actually in lymph, and how it might be different across your body. By Patrick van Nieuwenhuizen.", "slug": "what-is-lymph"}], "in_knowledge_map": false, "description": "3B: Your heart pumps roughly 20 L of blood throughout the day to your tissues. The plasma component of blood (not containing blood cells) leaks out through capillaries (the tiniest of blood vessels) and is mostly reabsorbed. However, about 3L of the plasma is left behind in fluid surrounding tissues, and it is the job of the hard-working lymphatic system to bring back this fluid to the circulatory system. The lymphatic system moves fluid in one direction, but without the force of a pump like the heart.", "node_slug": "lymphatic-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/lymphatic-system", "extended_slug": "test-prep/mcat/organ-systems/lymphatic-system", "kind": "Topic", "slug": "lymphatic-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/the-immune-system/", "id": "the-immune-system", "hide": false, "title": "Immune system", "child_data": [{"kind": "Exercise", "id": "x98d01047"}, {"kind": "Article", "id": "xf951c46e"}, {"kind": "Article", "id": "x1a92eb78"}, {"kind": "Video", "id": "24012"}, {"kind": "Video", "id": "24014"}, {"kind": "Video", "id": "24016"}, {"kind": "Video", "id": "24018"}, {"kind": "Video", "id": "24020"}, {"kind": "Video", "id": "24022"}, {"kind": "Video", "id": "24024"}, {"kind": "Video", "id": "xa3c5171b"}, {"kind": "Video", "id": "x71bee542"}, {"kind": "Video", "id": "xe563beb3"}, {"kind": "Video", "id": "xcf8c6f8f"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/the-immune-system/immune-system-questions/", "id": "immune-system-questions", "title": "Immune system questions", "description": "Immune system questions", "slug": "immune-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/role-of-phagocytes-in-innate-or-nonspecific-immunity/", "id": "O1N2rENXq_Y", "title": "Role of phagocytes in innate or nonspecific immunity", "kind": "Video", "description": "Role of phagocytes in innate or nonspecific immunity. Neutrophils, macrophages, and dendritic cells. MHC II.", "slug": "role-of-phagocytes-in-innate-or-nonspecific-immunity"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated/", "id": "rp7T4IItbtM", "title": "Types of immune responses: Innate and adaptive. humoral vs. cell-mediated", "kind": "Video", "description": "Overview of types of immune responses. Difference between innate and adaptive immunity. Differences between humoral adaptive immunity and cell-mediated adaptive immunity.", "slug": "types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/b-lymphocytes-b-cells/", "id": "Z36dUduOk1Y", "title": "B lymphocytes (B cells)", "kind": "Video", "description": "Overview of B cells (B lymphocytes) and how they are activated and produce antibodies", "slug": "b-lymphocytes-b-cells"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/professional-antigen-presenting-cells-apc-and-mhc-ii-complexes/", "id": "j_kSmmEpvQk", "title": "Professional antigen presenting cells (APC) and MHC II complexes", "kind": "Video", "description": "How professional antigen presenting cells present parts of engulfed pathogens on MHC II complexes (major histocompatibility complexes).", "slug": "professional-antigen-presenting-cells-apc-and-mhc-ii-complexes"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/helper-t-cells/", "id": "uwMYpTYsNZM", "title": "Helper T cells", "kind": "Video", "description": "Introduction to helper T cells and their role in activating B cells", "slug": "helper-t-cells"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/cytotoxic-t-cells/", "id": "oqI4skjr6lQ", "title": "Cytotoxic T cells", "kind": "Video", "description": "How cytotoxic T cells get activated by MHC-I/antigen complexes and then proceed to kill infected cells", "slug": "cytotoxic-t-cells"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/review-of-b-cells-cd4-t-cells-and-cd8-t-cells/", "id": "xaz5ftvZCyI", "title": "Review of B cells, CD4+ T cells and CD8+ T cells", "kind": "Video", "description": "Review of B cells, CD4+ T cells and CD8+ T cells", "slug": "review-of-b-cells-cd4-t-cells-and-cd8-t-cells"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/clonal-selection/", "id": "EsQyCHs4IBY", "title": "Clonal selection", "kind": "Video", "slug": "clonal-selection"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/self-versus-non-self/", "id": "afM6_VFaIss", "title": "Self vs. non-self immunity", "kind": "Video", "slug": "self-versus-non-self"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/how-white-blood-cells-move-around/", "id": "LXFQG4Ugreo", "title": "How white blood cells move around", "kind": "Video", "slug": "how-white-blood-cells-move-around"}, {"path": "khan/test-prep/mcat/organ-systems/the-immune-system/rn-blood-cell-lineages/", "id": "97nFwkRiNCc", "title": "Blood cell lineages", "kind": "Video", "slug": "rn-blood-cell-lineages"}], "in_knowledge_map": false, "description": "3B: Chances are , you\u2019ve had a fever or a cough at least once in your life (unless you live in a bubble, in which case you should probably go out more!) Have you ever wondered why your body reacts this way? Your body has a deadly arsenal of weapons against microbial invaders, ranging from bacteria and viruses to protozoans and fungi. We have specialized cells that destroy foreign bodies through mechanisms such as consumption, expulsion, and degradation. You will become acquainted with the interplay of the numerous soldiers in your body\u2019s army and how they keep you healthy!", "node_slug": "the-immune-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/the-immune-system", "extended_slug": "test-prep/mcat/organ-systems/the-immune-system", "kind": "Topic", "slug": "the-immune-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/the-renal-system/", "id": "the-renal-system", "hide": false, "title": "Renal system", "child_data": [{"kind": "Exercise", "id": "x98f6f1ed"}, {"kind": "Article", "id": "x9aa6a588"}, {"kind": "Article", "id": "x5a010e30"}, {"kind": "Article", "id": "x1cd7de77"}, {"kind": "Video", "id": "xa816dcfa"}, {"kind": "Video", "id": "xebe4fd0a"}, {"kind": "Video", "id": "xbf40106d"}, {"kind": "Video", "id": "xcba65aa4"}, {"kind": "Video", "id": "24030"}, {"kind": "Video", "id": "xbdffddb5"}, {"kind": "Video", "id": "x7815c894"}, {"kind": "Video", "id": "24028"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/the-renal-system/renal-system-questions/", "id": "renal-system-questions", "title": "Renal system questions", "description": "Renal system questions", "slug": "renal-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/the-renal-system/meet-the-kidneys/", "id": "mcQQGGShmLs", "title": "Meet the kidneys!", "kind": "Video", "slug": "meet-the-kidneys"}, {"path": "khan/test-prep/mcat/organ-systems/the-renal-system/how-do-our-kidneys-work/", "id": "ctGkLYuUCvU", "title": "Kidney function and anatomy", "kind": "Video", "slug": "how-do-our-kidneys-work"}, {"path": "khan/test-prep/mcat/organ-systems/the-renal-system/glomerular-filtration-in-the-nephron/", "id": "wWsdcfGta4k", "title": "Glomerular filtration in the nephron", "kind": "Video", "slug": "glomerular-filtration-in-the-nephron"}, {"path": "khan/test-prep/mcat/organ-systems/the-renal-system/changing-glomerular-filtration-rate/", "id": "x0pFo1RxTzM", "title": "Changing glomerular filtration rate", "kind": "Video", "slug": "changing-glomerular-filtration-rate"}, {"path": "khan/test-prep/mcat/organ-systems/the-renal-system/secondary-active-transport-in-the-nephron/", "id": "czY5nyvZ7cU", "title": "Secondary active transport in the nephron", "kind": "Video", "description": "Secondary Active Transport in the Nephron", "slug": "secondary-active-transport-in-the-nephron"}, {"path": "khan/test-prep/mcat/organ-systems/the-renal-system/countercurrent-multiplication-in-the-kidney/", "id": "Vqce2dtg45U", "title": "Countercurrent multiplication in the kidney", "kind": "Video", "slug": "countercurrent-multiplication-in-the-kidney"}, {"path": "khan/test-prep/mcat/organ-systems/the-renal-system/urination/", "id": "rheO1tVyB0U", "title": "Urination", "kind": "Video", "slug": "urination"}, {"path": "khan/test-prep/mcat/organ-systems/the-renal-system/the-kidney-and-nephron/", "id": "cc8sUv2SuaY", "title": "The kidney and nephron", "kind": "Video", "description": "Overview of how the nephrons in the kidney filter blood and reabsorb water and other molecules.", "slug": "the-kidney-and-nephron"}], "in_knowledge_map": false, "description": "3B: If you want to learn more about the renal system, then urine the right place! (Pun aside, the kidneys are about more than just making urine). Every thirty minutes, your kidneys filter the entire blood supply in your body. Imagine a dirty pool filled with algae. Placing a filter in this pool will cause the algae to be flushed out, and after a time you\u2019ll have a clean, crisp blue pool to enjoy. Just like the filter for a pool, our kidneys filter the blood and remove toxic wastes. These paired organs are key to maintaining electrolyte and water homeostasis in your body.", "node_slug": "the-renal-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/the-renal-system", "extended_slug": "test-prep/mcat/organ-systems/the-renal-system", "kind": "Topic", "slug": "the-renal-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/", "id": "renal-regulation-of-blood-pressure", "hide": false, "title": "Renal regulation of blood pressure", "child_data": [{"kind": "Exercise", "id": "xa0895736"}, {"kind": "Video", "id": "1047183569"}, {"kind": "Video", "id": "1047335429"}, {"kind": "Video", "id": "1047465049"}, {"kind": "Video", "id": "1047330622"}, {"kind": "Video", "id": "1047114997"}, {"kind": "Video", "id": "1047406243"}, {"kind": "Video", "id": "1047456036"}, {"kind": "Video", "id": "1047327652"}, {"kind": "Video", "id": "1058371798"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/renal-regulation-of-blood-pressure-questions/", "id": "renal-regulation-of-blood-pressure-questions", "title": "Renal regulation of blood pressure questions", "description": "Renal regulation of blood pressure questions", "slug": "renal-regulation-of-blood-pressure-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/general-overview-of-the-raas-system-cells-and-hormones/", "id": "BVUeCLt68Ik", "title": "General overview of the RAAS system: Cells and hormones", "kind": "Video", "description": "Learn the important cells and hormones that are working together to control your blood pressure! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "general-overview-of-the-raas-system-cells-and-hormones"}, {"path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/renin-production-in-the-kidneys/", "id": "AtlhAhONHyM", "title": "Renin production in the kidneys", "kind": "Video", "description": "Learn the three major triggers for Renin production by the Juxtaglomerular cells. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "renin-production-in-the-kidneys"}, {"path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/activating-angiotensin-2/", "id": "cUVS0AlRyw8", "title": "Activating angiotensin 2", "kind": "Video", "description": "See how Renin and ACE work to cut Angiotensinogen down to size! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "activating-angiotensin-2"}, {"path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/angiotensin-2-raises-blood-pressure/", "id": "Oges5YqDLHY", "title": "Angiotensin 2 raises blood pressure", "kind": "Video", "description": "See how Angiotensin 2 effects 4 target \"organs\" to increase blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "angiotensin-2-raises-blood-pressure"}, {"path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/aldosterone-raises-blood-pressure-and-lowers-potassium/", "id": "64_ZfIemRGM", "title": "Aldosterone raises blood pressure and lowers potassium", "kind": "Video", "description": "See how Aldosterone effects the principal cells of the kidney to raise BP and lower potassium. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-raises-blood-pressure-and-lowers-potassium"}, {"path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/aldosterone-removes-acid-from-the-blood/", "id": "7HTy-6NLWGM", "title": "Aldosterone removes acid from the blood", "kind": "Video", "description": "See how Aldosterone acts on the alpha-intercalated cell to remove protons (acid) from the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-removes-acid-from-the-blood"}, {"path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/adh-secretion/", "id": "8dQdfbE8kFU", "title": "ADH secretion", "kind": "Video", "description": "Learn the key triggers for ADH secretion. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adh-secretion"}, {"path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/adh-effects-on-blood-pressure/", "id": "Ot1We4_EfRE", "title": "ADH effects on blood pressure", "kind": "Video", "description": "See how ADH acts on blood vessels and the kidney to raise blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adh-effects-on-blood-pressure"}, {"path": "khan/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure/aldosterone-and-adh/", "id": "Z0XPMFL45oo", "title": "Aldosterone and ADH", "kind": "Video", "description": "Find out how Aldosterone and ADH cause changes in volume and osmolarity. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-and-adh"}], "in_knowledge_map": false, "description": "3B: In addition to fluid and electrolyte balance, the kidneys play an essential role in regulating blood pressure. When the nephron, the functional unit of the kidney, senses that it is not receiving much blood flow, it knows something is up. So begins a cascade which allows the nephron to reabsorb more fluid from the urine, in attempt to fill up the perceived dip in blood volume. Here you will learn the mechanism of ADH and the renin-angiotensin-aldosterone system in sustaining this homeostasis.", "node_slug": "renal-regulation-of-blood-pressure", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure", "extended_slug": "test-prep/mcat/organ-systems/renal-regulation-of-blood-pressure", "kind": "Topic", "slug": "renal-regulation-of-blood-pressure"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/", "id": "the-gastrointestinal-system", "hide": false, "title": "Gastrointestinal system", "child_data": [{"kind": "Exercise", "id": "xe7f76a2f"}, {"kind": "Video", "id": "x9884099f"}, {"kind": "Video", "id": "x6ec16651"}, {"kind": "Video", "id": "x2aae6128"}, {"kind": "Video", "id": "xbb2d8ab9"}, {"kind": "Video", "id": "x854eb5a2"}, {"kind": "Video", "id": "x0370d7c8"}, {"kind": "Video", "id": "x2192aa78"}, {"kind": "Video", "id": "xafe158bf"}, {"kind": "Video", "id": "xb50aa618"}, {"kind": "Video", "id": "xd8f3feca"}, {"kind": "Video", "id": "x890d5926"}, {"kind": "Video", "id": "x947fab36"}, {"kind": "Video", "id": "x595c4214"}, {"kind": "Video", "id": "xa85063cd"}, {"kind": "Video", "id": "x64e79811"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/gastrointestinal-system-questions/", "id": "gastrointestinal-system-questions", "title": "Gastrointestinal system questions", "description": "Gastrointestinal system questions", "slug": "gastrointestinal-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/meet-the-gastrointestinal-tract/", "id": "Oh_Pt_UrtEE", "title": "Meet the gastrointestinal tract!", "kind": "Video", "slug": "meet-the-gastrointestinal-tract"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/mouth/", "id": "KyEk35-Uwh0", "title": "Mouth", "kind": "Video", "slug": "mouth"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/teeth/", "id": "9wYbsSrDwbA", "title": "Teeth", "kind": "Video", "slug": "teeth"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/esophagus/", "id": "wU9_daCwr_w", "title": "Esophagus", "kind": "Video", "slug": "esophagus"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/stomach/", "id": "OzLoUCCASwM", "title": "Stomach", "kind": "Video", "slug": "stomach"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/small-intestine-part-1/", "id": "UgnF1w-H8vw", "title": "Small intestine 1: Structure", "kind": "Video", "slug": "small-intestine-part-1"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/small-intestine-part-2-digestion/", "id": "nLCNoT79_-o", "title": "Small intestine 2: Digestion", "kind": "Video", "slug": "small-intestine-part-2-digestion"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/small-intestine-part-3-absorption/", "id": "7zq3s3F5Do8", "title": "Small intestine 3: Absorption", "kind": "Video", "slug": "small-intestine-part-3-absorption"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/liver/", "id": "rDjWrNRKfvg", "title": "Liver", "kind": "Video", "slug": "liver"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/hepatic-lobule/", "id": "nJfB32MtqBA", "title": "Hepatic lobule", "kind": "Video", "slug": "hepatic-lobule"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/biliary-tree/", "id": "jmfcACEGW-0", "title": "Biliary tree", "kind": "Video", "slug": "biliary-tree"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/exocrine-pancreas/", "id": "BtqlMr1rUT8", "title": "Exocrine pancreas", "kind": "Video", "slug": "exocrine-pancreas"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/endocrine-pancreas/", "id": "xNf--q0YMq8", "title": "Endocrine pancreas", "kind": "Video", "slug": "endocrine-pancreas"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/colon-rectum-anus/", "id": "Lzr9GGjh6YQ", "title": "Colon, rectum, and anus", "kind": "Video", "slug": "colon-rectum-anus"}, {"path": "khan/test-prep/mcat/organ-systems/the-gastrointestinal-system/control-of-the-gi-tract/", "id": "_kfB2qKjdgM", "title": "Control of the GI tract", "kind": "Video", "slug": "control-of-the-gi-tract"}], "in_knowledge_map": false, "description": "3B: You begin with mechanical digestion in your mouth, where starches are also broken down. The bolus of food travels down your esophagus into the stomach, where it sits and churns, further allowing for breakdown of biomolecules like fat and protein.The contents of the stomach then enter the small intestine, which is where the bulk of digestion and absorption of nutrients occurs through the work of shear mechanical (peristalsis) and chemical (digestive enzymes) force. Then our food commutes through the large intestine (AKA the colon), where most of the fluid absorption in the GI tract occurs. Phew! Eating sure is a lot of work! By Raja Narayan.", "node_slug": "the-gastrointestinal-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/the-gastrointestinal-system", "extended_slug": "test-prep/mcat/organ-systems/the-gastrointestinal-system", "kind": "Topic", "slug": "the-gastrointestinal-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/muscular-system/", "id": "muscular-system", "hide": false, "title": "Muscular system", "child_data": [{"kind": "Exercise", "id": "x9b766eb1"}, {"kind": "Video", "id": "24004"}, {"kind": "Video", "id": "24006"}, {"kind": "Video", "id": "24008"}, {"kind": "Video", "id": "xc5597198"}, {"kind": "Video", "id": "1097595603"}, {"kind": "Video", "id": "xe87d0c16"}, {"kind": "Video", "id": "x71e0e24c"}, {"kind": "Video", "id": "xbb0cbe62"}, {"kind": "Video", "id": "1101443158"}, {"kind": "Video", "id": "x2ef4988a"}, {"kind": "Video", "id": "x794c36ac"}, {"kind": "Video", "id": "x7926b1ce"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/muscular-system/muscular-system-questions/", "id": "muscular-system-questions", "title": "Muscular system questions", "description": "Muscular system questions", "slug": "muscular-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/myosin-and-actin/", "id": "zopoN2i7ALQ", "title": "Myosin and actin", "kind": "Video", "description": "How myosin and actin interact to produce mechanical force.", "slug": "myosin-and-actin"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction/", "id": "LiOfeSsjrB8", "title": "Tropomyosin and troponin and their role in regulating muscle contraction", "kind": "Video", "description": "Tropomyosin and troponin and their role in regulating muscle contraction. How calcium ion concentration dictates whether a muscle is contracting or not.", "slug": "tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/role-of-the-sarcoplasmic-reticulum-in-muscle-cells/", "id": "SauhB2fYQkM", "title": "Role of the sarcoplasmic reticulum in muscle cells", "kind": "Video", "description": "The role of the sarcoplasmic reticulum in controlling calcium ion concentrations within the muscle cell.", "slug": "role-of-the-sarcoplasmic-reticulum-in-muscle-cells"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/anatomy-of-a-muscle-cell-1/", "id": "L-_MvjcH0xk", "title": "Anatomy of a muscle cell", "kind": "Video", "description": "Understanding the structure of a muscle cell. By Raja Narayan.", "slug": "anatomy-of-a-muscle-cell-1"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/three-types-of-muscle/", "id": "bwOE1MEginA", "title": "Three types of muscle", "kind": "Video", "description": "Understanding the structure of a muscle cell.", "slug": "three-types-of-muscle"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/motor-neurons/", "id": "LwA00uqniiU", "title": "Motor neurons", "kind": "Video", "description": "How do neurons help us move? Learn about how motor neurons send signals to muscle cells and what happens when we damage this precious neurons. By Raja Narayan.", "slug": "motor-neurons"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/neuromuscular-junction/", "id": "lRJd56BCidg", "title": "Neuromuscular junction, motor end-plate", "kind": "Video", "description": "How do neurons talk directly to muscle cells? Learn about how a neuronal message is translated into a muscular action at the neuromuscular junction. By Raja Narayan.", "slug": "neuromuscular-junction"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/type-1-and-2-muscle-fibers/", "id": "l5yMz2lFgx0", "title": "Type 1 and type 2 muscle fibers", "kind": "Video", "description": "What's the difference between type 1 and type 2 muscle fibers? Learn one golden rule that will help you easily distinguish between them. By Raja Narayan.", "slug": "type-1-and-2-muscle-fibers"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/calcium-puts-myosin-to-work/", "id": "vv6WBeqw2Nc", "title": "Calcium puts myosin to work", "kind": "Video", "description": "See exactly how Calcium binds Troponin-C and allows Myosin to do some work.", "slug": "calcium-puts-myosin-to-work"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/muscle-innervation/", "id": "NqasGo5q5yQ", "title": "Muscle innervation", "kind": "Video", "description": "Which muscles do we voluntarily control? Which muscles do we have NO control over? What's the difference between sympathetic and parasympathetic innervation? Learn about how our brain splits its control over the body into autonomic and somatic nervous systems.\u00a0 By Raja Narayan.", "slug": "muscle-innervation"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/autonomic-somatic-nervous-system/", "id": "ye28W_OygOw", "title": "Autonomic vs somatic nervous system", "kind": "Video", "description": "Understand the different divisions of the brain that control our muscles.\u00a0 By Raja Narayan.", "slug": "autonomic-somatic-nervous-system"}, {"path": "khan/test-prep/mcat/organ-systems/muscular-system/thermoregulation-by-muscles/", "id": "HfXqyPS5bRo", "title": "Thermoregulation by muscles", "kind": "Video", "description": "Why do we shiver when it's cold? How do our muscles make sure we don't freeze or have a heat stroke? Learn how the skin, brain, blood vessels, and muscles work together to maintain our core body temperature.\u00a0 By Raja Narayan.", "slug": "thermoregulation-by-muscles"}], "in_knowledge_map": false, "description": "3B: Muscles never sleep (literally). If you have ever taken a breath, you have benefited from the work of the diaphragm, which contracts to create an area of low pressure within your thoracic cavity, allowing air in. How exactly are some weightlifters able to support 717 lbs without breaking anything more than a little sweat? Fun fact: the largest muscle in your body is the gluteus maximus (that\u2019s your butt) while the smallest skeletal muscle is the stapedius (it stabilizes the smallest bone, the stapes, which is in your middle ear). By Raja Narayan.", "node_slug": "muscular-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/muscular-system", "extended_slug": "test-prep/mcat/organ-systems/muscular-system", "kind": "Topic", "slug": "muscular-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/the-skeletal-system/", "id": "the-skeletal-system", "hide": false, "title": "Skeletal system", "child_data": [{"kind": "Exercise", "id": "xac790c49"}, {"kind": "Video", "id": "x5e2ec71a"}, {"kind": "Video", "id": "x2354d3d6"}, {"kind": "Video", "id": "xf10511b3"}, {"kind": "Video", "id": "x3b4aac33"}, {"kind": "Video", "id": "xcfe8f34b"}, {"kind": "Video", "id": "xd846e40a"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/the-skeletal-system/skeletal-system-questions/", "id": "skeletal-system-questions", "title": "Skeletal system questions", "description": "Skeletal system questions", "slug": "skeletal-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/the-skeletal-system/skeletal-structure-and-function/", "id": "muiNDpURT9M", "title": "Skeletal structure and function", "kind": "Video", "slug": "skeletal-structure-and-function"}, {"path": "khan/test-prep/mcat/organ-systems/the-skeletal-system/microscopic-structure-of-bone-haversian-system/", "id": "6_PP49FuyTM", "title": "Microscopic structure of bone - the Haversian system", "kind": "Video", "slug": "microscopic-structure-of-bone-haversian-system"}, {"path": "khan/test-prep/mcat/organ-systems/the-skeletal-system/cellular-structure-of-bone/", "id": "um6_5re9XU0", "title": "Cellular structure of bone", "kind": "Video", "slug": "cellular-structure-of-bone"}, {"path": "khan/test-prep/mcat/organ-systems/the-skeletal-system/skeletal-endocrine-control/", "id": "j3oBvc3lKsY", "title": "Skeletal endocrine control", "kind": "Video", "slug": "skeletal-endocrine-control"}, {"path": "khan/test-prep/mcat/organ-systems/the-skeletal-system/cartilage/", "id": "5kpVQqV7EV8", "title": "Cartilage", "kind": "Video", "slug": "cartilage"}, {"path": "khan/test-prep/mcat/organ-systems/the-skeletal-system/ligaments-tendons-and-joints/", "id": "nxfWL0TR5H4", "title": "Ligaments, tendons, and joints", "kind": "Video", "slug": "ligaments-tendons-and-joints"}], "in_knowledge_map": false, "description": "3B: Were it not for your skeleton, you and I would be a mere sack of flesh. You will come to appreciate that the bones, together with muscles, are a scaffolding for your body. We will also explore their endocrine function, especially with regards to calcium and phosphate homeostasis. Fun fact: the bone most broken is the clavicle (AKA collar bone).", "node_slug": "the-skeletal-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/the-skeletal-system", "extended_slug": "test-prep/mcat/organ-systems/the-skeletal-system", "kind": "Topic", "slug": "the-skeletal-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/integumentary-system/", "id": "integumentary-system", "hide": false, "title": "Integumentary system", "child_data": [{"kind": "Exercise", "id": "x260e8e7e"}, {"kind": "Video", "id": "xbcdaefeb"}, {"kind": "Video", "id": "x23a3b3fe"}, {"kind": "Video", "id": "x19e6aeea"}, {"kind": "Video", "id": "xb8babf76"}, {"kind": "Video", "id": "xf641d7d7"}, {"kind": "Video", "id": "1022193589"}, {"kind": "Video", "id": "x98d6edc4"}, {"kind": "Video", "id": "x1e0f9664"}, {"kind": "Video", "id": "x3c61aa8e"}, {"kind": "Video", "id": "x7f17449b"}, {"kind": "Video", "id": "x7926b1ce"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/integumentary-system/integumentary-system-questions/", "id": "integumentary-system-questions", "title": "Integumentary system questions", "description": "Integumentary system questions", "slug": "integumentary-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/meet-the-skin/", "id": "4zKjzl0futI", "title": "Meet the skin! (Overview)", "kind": "Video", "slug": "meet-the-skin"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/what-is-skin/", "id": "TjYbFdSY0LA", "title": "What is skin? (Epidermis)", "kind": "Video", "slug": "what-is-skin"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/what-lies-beneath-the-epidermis-dermis-and-hypodermis/", "id": "Vn-tOBUvnD8", "title": "What lies beneath the epidermis? (Dermis and Hypodermis)", "kind": "Video", "slug": "what-lies-beneath-the-epidermis-dermis-and-hypodermis"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/where-do-our-nails-and-hair-come-from/", "id": "RD0waXH62AI", "title": "Where do our nails and hair come from?", "kind": "Video", "slug": "where-do-our-nails-and-hair-come-from"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/whats-in-sweat-holocrine-apocrine-and-merocrine-glands/", "id": "A44_Sqifi0U", "title": "What's in sweat? (Holocrine, Apocrine, Merocrine Glands)", "kind": "Video", "slug": "whats-in-sweat-holocrine-apocrine-and-merocrine-glands"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/lebron-asks-why-does-sweating-cool-you-down/", "id": "jgnNhL2jSXY", "title": "LeBron Asks: Why does sweating cool you down?", "kind": "Video", "description": "LeBron asks Sal why sweating helps cool the body down.", "slug": "lebron-asks-why-does-sweating-cool-you-down"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/overview-of-sensation-and-meissners-corpuscles/", "id": "0-pHx5rKKqI", "title": "Overview of Sensation and Meissner's Corpuscle", "kind": "Video", "slug": "overview-of-sensation-and-meissners-corpuscles"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/pacinians-corpuscle-and-merkels-disk/", "id": "IW8OnV8J2Qw", "title": "Pacinian's Corpuscle and Merkel's Disk", "kind": "Video", "slug": "pacinians-corpuscle-and-merkels-disk"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/ruffinis-ending-and-hair-follicle-receptor-2/", "id": "k9cj_rZO448", "title": "Ruffini's Ending and Hair Follicle Receptor", "kind": "Video", "slug": "ruffinis-ending-and-hair-follicle-receptor-2"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/pain-and-temperature-1/", "id": "D-oAsFIHqbY", "title": "Pain and temperature", "kind": "Video", "description": "Explore our senses of pain & temperature. \u00a0By Ron.", "slug": "pain-and-temperature-1"}, {"path": "khan/test-prep/mcat/organ-systems/integumentary-system/thermoregulation-by-muscles/", "id": "HfXqyPS5bRo", "title": "Thermoregulation by muscles", "kind": "Video", "description": "Why do we shiver when it's cold? How do our muscles make sure we don't freeze or have a heat stroke? Learn how the skin, brain, blood vessels, and muscles work together to maintain our core body temperature.\u00a0 By Raja Narayan.", "slug": "thermoregulation-by-muscles"}], "in_knowledge_map": false, "description": "3B: There is really more than meets the eye with skin. Yes, it does make us look nicer than a bag of bones, muscles, and organs. But it also serves other important purposes which range from guarding the body against infection to sensation to allowing for metabolism of vitamin D. We will explore the structure and function of skin from the macroscopic to the microscopic level in this tutorial.", "node_slug": "integumentary-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/integumentary-system", "extended_slug": "test-prep/mcat/organ-systems/integumentary-system", "kind": "Topic", "slug": "integumentary-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/", "id": "mcat-reproductive-system", "hide": false, "title": "Reproductive system", "child_data": [{"kind": "Exercise", "id": "xe8f9c5e2"}, {"kind": "Exercise", "id": "x70b4c625"}, {"kind": "Video", "id": "x765c2a69"}, {"kind": "Video", "id": "x6d80ffca"}, {"kind": "Video", "id": "x5701261a"}, {"kind": "Video", "id": "xc50a9018"}, {"kind": "Video", "id": "xb4562311"}, {"kind": "Video", "id": "x692b7bba"}, {"kind": "Video", "id": "xf4dafb4e"}, {"kind": "Video", "id": "1192840523"}, {"kind": "Video", "id": "x2accaf63"}, {"kind": "Video", "id": "xdcc4fd4d"}, {"kind": "Video", "id": "x2cd75462"}, {"kind": "Video", "id": "x1e317267"}, {"kind": "Video", "id": "x7b808228"}, {"kind": "Video", "id": "x2ba850e1"}], "children": [{"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/reproductive-system-questions/", "id": "reproductive-system-questions", "title": "Reproductive system questions", "description": "Reproductive system questions", "slug": "reproductive-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/reproductive-questions-2/", "id": "reproductive-questions-2", "title": "Reproductive system questions 2", "description": "Reproductive system questions 2", "slug": "reproductive-questions-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/welcome-to-the-reproductive-system/", "id": "jRYEqOOrjH8", "title": "Welcome to the reproductive system", "kind": "Video", "slug": "welcome-to-the-reproductive-system"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/anatomy-of-the-male-reproductive-system/", "id": "_ce-IVjQYws", "title": "Anatomy of the male reproductive system", "kind": "Video", "slug": "anatomy-of-the-male-reproductive-system"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/transport-of-sperm-via-erection-and-ejaculation/", "id": "XLoLvz0r550", "title": "Transport of sperm via erection and ejaculation", "kind": "Video", "slug": "transport-of-sperm-via-erection-and-ejaculation"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/spermatogenesis/", "id": "QUJ-xnv53UM", "title": "Spermatogenesis", "kind": "Video", "slug": "spermatogenesis"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/testosterone/", "id": "k4e70nG3T8U", "title": "Testosterone", "kind": "Video", "slug": "testosterone"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/basics-of-egg-development/", "id": "Msrym4oGVSk", "title": "Basics of egg development", "kind": "Video", "slug": "basics-of-egg-development"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/the-ovarian-cycle/", "id": "VYSFNwTUkG0", "title": "The ovarian cycle", "kind": "Video", "slug": "the-ovarian-cycle"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/meet-the-placenta/", "id": "bQioHx12JuY", "title": "Meet the placenta!", "kind": "Video", "description": "Learn how the needs of the fetus are met by the placenta, which is a special organ that belongs to both the mother and the fetus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-placenta"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/reproductive-cycle-graph-follicular-phase/", "id": "gmKAuceSf-s", "title": "Reproductive cycle graph - Follicular phase", "kind": "Video", "slug": "reproductive-cycle-graph-follicular-phase"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/reproductive-cycle-graph-luteal-phase/", "id": "uA7Xny276sk", "title": "Reproductive cycle graph - Luteal phase", "kind": "Video", "slug": "reproductive-cycle-graph-luteal-phase"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/estrogen/", "id": "eK7Gp6AWnuY", "title": "Estrogen", "kind": "Video", "slug": "estrogen"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/maternal-changes-in-pregnancy/", "id": "A0sp7I9rlz8", "title": "Maternal changes in pregnancy", "kind": "Video", "slug": "maternal-changes-in-pregnancy"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/labor-parturition/", "id": "GxQAAqRzwNw", "title": "Labor (parturition)", "kind": "Video", "slug": "labor-parturition"}, {"path": "khan/test-prep/mcat/organ-systems/mcat-reproductive-system/breast-anatomy-and-lactation/", "id": "bflHwVKgRNE", "title": "Breast anatomy and lactation", "kind": "Video", "slug": "breast-anatomy-and-lactation"}], "in_knowledge_map": false, "description": "Starting with sexual reproduction and then the development of a baby, we\u2019re going to take a journey that starts with our own microscopic beginning, and ends with a fully formed baby entering the world.", "node_slug": "mcat-reproductive-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/organ-systems/mcat-reproductive-system", "extended_slug": "test-prep/mcat/organ-systems/mcat-reproductive-system", "kind": "Topic", "slug": "mcat-reproductive-system"}], "in_knowledge_map": false, "description": "Foundational Concept 3: Complex systems of tissues and organs sense the internal and external environments of multicellular organisms, and through integrated functioning, maintain a stable internal environment within an ever-changing external environment.", "node_slug": "organ-systems", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/organ-systems", "extended_slug": "test-prep/mcat/organ-systems", "kind": "Topic", "slug": "organ-systems"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/", "id": "physical-processes", "hide": false, "title": "Physical processes", "child_data": [{"kind": "Topic", "id": "x9e20005d"}, {"kind": "Topic", "id": "x97c12dca"}, {"kind": "Topic", "id": "x0916c6ff"}, {"kind": "Topic", "id": "x664ba0fe"}, {"kind": "Topic", "id": "x74a26772"}, {"kind": "Topic", "id": "x317a2931"}, {"kind": "Topic", "id": "x82c54a33"}, {"kind": "Topic", "id": "x408cab36"}, {"kind": "Topic", "id": "xaeacb8a5"}, {"kind": "Topic", "id": "xfe8764aa"}, {"kind": "Topic", "id": "xb234fb52"}, {"kind": "Topic", "id": "x440e5da9"}, {"kind": "Topic", "id": "x957b7de1"}, {"kind": "Topic", "id": "x1864db5a"}, {"kind": "Topic", "id": "xdf0451b2"}, {"kind": "Topic", "id": "xc9783a95"}, {"kind": "Topic", "id": "xe2195c5e"}, {"kind": "Topic", "id": "xcea78dac"}, {"kind": "Topic", "id": "x5e63d150"}, {"kind": "Topic", "id": "xfc936e99"}, {"kind": "Topic", "id": "xba230f94"}, {"kind": "Topic", "id": "x08e93c97"}, {"kind": "Topic", "id": "x81f31254"}, {"kind": "Topic", "id": "x8bf258db"}, {"kind": "Topic", "id": "xd852b1aa"}, {"kind": "Topic", "id": "x90eecc63"}, {"kind": "Topic", "id": "x01eb1ed2"}, {"kind": "Topic", "id": "x5027b2fc"}, {"kind": "Topic", "id": "x70f8189d"}, {"kind": "Topic", "id": "x96517682"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/vectors-and-scalars/", "id": "vectors-and-scalars", "hide": false, "title": "Vectors and scalars", "child_data": [{"kind": "Exercise", "id": "xf7cac320"}, {"kind": "Video", "id": "113633126"}, {"kind": "Video", "id": "x565cceab"}, {"kind": "Video", "id": "25609"}, {"kind": "Video", "id": "25611"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/vectors-and-scalars/vectors-and-scalars-questions/", "id": "vectors-and-scalars-questions", "title": "Vectors and scalars questions", "description": "Questions pertaining to vectors and scalars", "slug": "vectors-and-scalars-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/vectors-and-scalars/introduction-to-vectors-and-scalars/", "id": "ihNZlp7iUHE", "title": "Introduction to vectors and scalars", "kind": "Video", "description": "Distance, displacement, speed and velocity. Difference between vectors and scalars", "slug": "introduction-to-vectors-and-scalars"}, {"path": "khan/test-prep/mcat/physical-processes/vectors-and-scalars/vectors-and-scalars-in-2d-edited/", "id": "O-Onby3soVo", "title": "Visualizing vectors in 2 dimensions", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "vectors-and-scalars-in-2d-edited"}, {"path": "khan/test-prep/mcat/physical-processes/vectors-and-scalars/unit-vector-notation/", "id": "FaF3v-ezbSk", "title": "Unit vector notation", "kind": "Video", "description": "Expressing a vector as the scaled sum of unit vectors", "slug": "unit-vector-notation"}, {"path": "khan/test-prep/mcat/physical-processes/vectors-and-scalars/unit-vector-notation-part-2/", "id": "595Tiga1gIg", "title": "Unit vector notation (part 2)", "kind": "Video", "description": "More on unit vector notation. Showing that adding the x and y components of two vectors is equivalent to adding the vectors visually using the head-to-tail method", "slug": "unit-vector-notation-part-2"}], "in_knowledge_map": false, "description": "4A: It\u2019s gym day. Today you are going to run, swim, and lift weights. In physics terms, we can describe these actions in terms of vectors and scalars. For instance, if you throw a discus across a field with a 20-pound force westward, that is an example of a vector: an entity with both magnitude and direction. However, when you show off about how many laps you can swim in an hour, you are referring to speed, a scalar, which does not specify direction. An understanding of vectors and scalar will provide a foundation to many of the other basic concepts in physics.", "node_slug": "vectors-and-scalars", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/vectors-and-scalars", "extended_slug": "test-prep/mcat/physical-processes/vectors-and-scalars", "kind": "Topic", "slug": "vectors-and-scalars"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/speed-and-velocity/", "id": "speed-and-velocity", "hide": false, "title": "Speed and velocity", "child_data": [{"kind": "Exercise", "id": "xaffae850"}, {"kind": "Video", "id": "x4b26c427"}, {"kind": "Video", "id": "113633128"}, {"kind": "Video", "id": "113633129"}, {"kind": "Video", "id": "xc7e30831"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/speed-and-velocity/speed-and-velocity-questions/", "id": "speed-and-velocity-questions", "title": "Speed and velocity questions", "description": "Speed and velocity questions", "slug": "speed-and-velocity-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/speed-and-velocity/calculating-average-speed-and-velocity-edited/", "id": "6G1MQi2VFMI", "title": "Calculating average speed and velocity edited", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "calculating-average-speed-and-velocity-edited"}, {"path": "khan/test-prep/mcat/physical-processes/speed-and-velocity/solving-for-time/", "id": "awzOvyMKeMA", "title": "Solving for time", "kind": "Video", "description": "Simple example of solving for time given distance and rate", "slug": "solving-for-time"}, {"path": "khan/test-prep/mcat/physical-processes/speed-and-velocity/displacement-from-time-and-velocity-example/", "id": "lQ-dvt3V4yQ", "title": "Displacement from time and velocity example", "kind": "Video", "description": "Worked example of calculating displacement from time and velocity", "slug": "displacement-from-time-and-velocity-example"}, {"path": "khan/test-prep/mcat/physical-processes/speed-and-velocity/instantaneous-speed-and-velocity/", "id": "pfTTHx9kCHk", "title": "Instantaneous speed and velocity", "kind": "Video", "slug": "instantaneous-speed-and-velocity"}], "in_knowledge_map": false, "description": "4A: With every beat, your heart pumps blood throughout the vessels of your body. Let\u2019s look at the radial artery, one of the vessels in your arm. How fast is the blood going at a particular point in time, and in what direction? The speed is an absolute number without direction - 1.8 kilometers per hour in this case. Velocity expands on the speed, which is an absolute value, by adding direction - for instance, 1.8 kilometers per hour downward. It\u2019s that easy! you already grasping the concept of speed and velocity, terms used to describe the rate of change in our distance over time.", "node_slug": "speed-and-velocity", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/speed-and-velocity", "extended_slug": "test-prep/mcat/physical-processes/speed-and-velocity", "kind": "Topic", "slug": "speed-and-velocity"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/acceleration-mcat/", "id": "acceleration-mcat", "hide": false, "title": "Acceleration", "child_data": [{"kind": "Exercise", "id": "x06fa1248"}, {"kind": "Article", "id": "xc2168e36"}, {"kind": "Video", "id": "115608380"}, {"kind": "Video", "id": "x79db8622"}, {"kind": "Video", "id": "115608385"}, {"kind": "Video", "id": "115608383"}, {"kind": "Video", "id": "115608384"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/acceleration-mcat/acceleration-questions/", "id": "acceleration-questions", "title": "Acceleration questions", "description": "Acceleration questions", "slug": "acceleration-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/acceleration-mcat/acceleration/", "id": "FOkQszg1-j8", "title": "Acceleration", "kind": "Video", "description": "Calculating the acceleration of a Porsche", "slug": "acceleration"}, {"path": "khan/test-prep/mcat/physical-processes/acceleration-mcat/airbus-a380-take-off-time-2/", "id": "pdU1qTky64o", "title": "Airbus A380 take-off time", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "airbus-a380-take-off-time-2"}, {"path": "khan/test-prep/mcat/physical-processes/acceleration-mcat/airbus-a380-take-off-distance/", "id": "fQt69_Q2CTw", "title": "Airbus A380 take-off distance", "kind": "Video", "description": "How long of a runway does an A380 need?", "slug": "airbus-a380-take-off-distance"}, {"path": "khan/test-prep/mcat/physical-processes/acceleration-mcat/why-distance-is-area-under-velocity-time-line/", "id": "d-_eqgj5-K8", "title": "Why distance is area under velocity-time line", "kind": "Video", "description": "Understanding why distance is area under velocity-time line", "slug": "why-distance-is-area-under-velocity-time-line"}, {"path": "khan/test-prep/mcat/physical-processes/acceleration-mcat/average-velocity-for-constant-acceleration/", "id": "MAS6mBRZZXA", "title": "Average velocity for constant acceleration", "kind": "Video", "description": "Calculating average velocity when acceleration is constant", "slug": "average-velocity-for-constant-acceleration"}], "in_knowledge_map": false, "description": "4A: Let\u2019s imagine blood flowing through the aorta, one of the great vessels in our body. At peak velocity, blood may flow at 92 cm/sec (during contraction) or perhaps 60 cm/sec during relaxation. Going from 60 cm/sec to 92 cm/sec in 1 second is a lot different from going from 60 cm/sec to 92 cm/sec in 10 seconds. That difference is acceleration, that is, how quickly the car changes its velocity over time. (When you hear automobile enthusiasts compare the \u201c0 to 60\u201d capabilities of the latest sportscar, they are referring to the acceleration).", "node_slug": "acceleration-mcat", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/acceleration-mcat", "extended_slug": "test-prep/mcat/physical-processes/acceleration-mcat", "kind": "Topic", "slug": "acceleration-mcat"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/", "id": "newtons-laws-and-equilibrium", "hide": false, "title": "Newton's laws and equilibrium", "child_data": [{"kind": "Exercise", "id": "xa17fed3d"}, {"kind": "Video", "id": "116854909"}, {"kind": "Video", "id": "904189322"}, {"kind": "Video", "id": "116854910"}, {"kind": "Video", "id": "897520017"}, {"kind": "Video", "id": "116854911"}, {"kind": "Video", "id": "25601"}, {"kind": "Video", "id": "25603"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/newton-s-laws-and-equilibrium-questions/", "id": "newton-s-laws-and-equilibrium-questions", "title": "Newton's laws and equilibrium questions", "description": "Questions pertaining to Newton's laws and equilibrium", "slug": "newton-s-laws-and-equilibrium-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/newton-s-first-law-of-motion/", "id": "CQYELiTtUs8", "title": "More on Newton's first law of motion", "kind": "Video", "description": "Newton's First Law (Galileo's Law of Inertia).", "slug": "newton-s-first-law-of-motion"}, {"path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/newton-s-first-law-of-motion-concepts/", "id": "D1NubiWCpQg", "title": "Newton's first law of motion concepts", "kind": "Video", "description": "A little quiz on some of the ideas in Newton's first law", "slug": "newton-s-first-law-of-motion-concepts"}, {"path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/newton-s-second-law-of-motion/", "id": "ou9YMWlJgkE", "title": "Newton's second law of motion", "kind": "Video", "description": "Newton's Second Law of Motion: F=ma", "slug": "newton-s-second-law-of-motion"}, {"path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/unbalanced-forces-and-motion/", "id": "IgYUR7aFY-c", "title": "Unbalanced forces and motion", "kind": "Video", "description": "Thinking about what is true about how unbalanced forces relate to motion and acceleration", "slug": "unbalanced-forces-and-motion"}, {"path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/newton-s-third-law-of-motion/", "id": "By-ggTfeuJU", "title": "Newton's third law of motion", "kind": "Video", "description": "Every action has an equal and opposite reaction", "slug": "newton-s-third-law-of-motion"}, {"path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/center-of-mass/", "id": "VrflZifKIuw", "title": "Center of mass", "kind": "Video", "description": "Introduction to the center of mass", "slug": "center-of-mass"}, {"path": "khan/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium/introduction-to-torque/", "id": "QhuJn8YBtmg", "title": "Introduction to torque", "kind": "Video", "description": "An introduction to torque", "slug": "introduction-to-torque"}], "in_knowledge_map": false, "description": "4A: Apples would not fall without a force to propel them downward. These three laws described by the famous Englishman centuries ago still inform our understanding of the physical world today. When you push a patient\u2019s bed down the halls of the hospital, you are providing a force in a direction. If we know the magnitude of the force we provide as well as the mass of the patient and the hospital bed, we can calculate the acceleration of the patient and his bed using Newton\u2019s Second law (F=ma).", "node_slug": "newtons-laws-and-equilibrium", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/newtons-laws-and-equilibrium", "extended_slug": "test-prep/mcat/physical-processes/newtons-laws-and-equilibrium", "kind": "Topic", "slug": "newtons-laws-and-equilibrium"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/normal-forces/", "id": "normal-forces", "hide": false, "title": "Normal forces", "child_data": [{"kind": "Exercise", "id": "x9d63c56e"}, {"kind": "Video", "id": "897591106"}, {"kind": "Video", "id": "121089538"}, {"kind": "Video", "id": "123032799"}, {"kind": "Video", "id": "897500670"}, {"kind": "Video", "id": "897521821"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/normal-forces/normal-forces-questions/", "id": "normal-forces-questions", "title": "Normal forces questions", "description": "Normal forces questions", "slug": "normal-forces-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/normal-forces/balanced-and-unbalanced-forces/", "id": "oNgo9bbDi7Q", "title": "Balanced and unbalanced forces", "kind": "Video", "description": "Primer on identifying balanced and unbalanced forces", "slug": "balanced-and-unbalanced-forces"}, {"path": "khan/test-prep/mcat/physical-processes/normal-forces/normal-force-and-contact-force/", "id": "1WOrgrIcQZU", "title": "Normal force and contact force", "kind": "Video", "description": "The force that keeps a block of ice from falling towards the center of the earth", "slug": "normal-force-and-contact-force"}, {"path": "khan/test-prep/mcat/physical-processes/normal-forces/normal-force-in-an-elevator/", "id": "hoRsHNSrMpc", "title": "Normal force in an elevator", "kind": "Video", "description": "How the normal force changes when an elevator accelerates", "slug": "normal-force-in-an-elevator"}, {"path": "khan/test-prep/mcat/physical-processes/normal-forces/slow-sock-on-lubricon-vi/", "id": "CEdXvoAv_oM", "title": "Slow sock on Lubricon VI", "kind": "Video", "description": "What would happen to a slowly moving frozen sock on a frictionless planet", "slug": "slow-sock-on-lubricon-vi"}, {"path": "khan/test-prep/mcat/physical-processes/normal-forces/normal-forces-on-lubricon-vi/", "id": "hJ18CrKU3Zc", "title": "Normal forces on Lubricon VI", "kind": "Video", "description": "Whether the normal force balances the force of gravity for a frozen sock or banana", "slug": "normal-forces-on-lubricon-vi"}], "in_knowledge_map": false, "description": "4A: How do forces work inside an elevator or when you slide a box across the floor? Normal forces are forces which act perpendicularly to surfaces. When you see a patient in a hospital bed, the reason he does not fall through the bed is because the ground provides the patient with a normal force that directly opposes the force of the Earth\u2019s gravity on your the body (this is why you aren\u2019t sinking to the Earth\u2019s core right now). We will walk through real-world physical examples like these to shed light on normal forces.", "node_slug": "normal-forces", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/normal-forces", "extended_slug": "test-prep/mcat/physical-processes/normal-forces", "kind": "Topic", "slug": "normal-forces"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/force-of-tension/", "id": "force-of-tension", "hide": false, "title": "Force of tension", "child_data": [{"kind": "Exercise", "id": "x1d02e792"}, {"kind": "Video", "id": "25561"}, {"kind": "Video", "id": "25563"}, {"kind": "Video", "id": "25573"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/force-of-tension/force-of-tension-questions/", "id": "force-of-tension-questions", "title": "Force of tension questions", "description": "Force of tension questions", "slug": "force-of-tension-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/force-of-tension/introduction-to-tension/", "id": "_UrfHFEBIpU", "title": "Introduction to tension", "kind": "Video", "description": "An introduction to tension. Solving for the tension(s) in a set of wires when a weight is hanging from them.", "slug": "introduction-to-tension"}, {"path": "khan/test-prep/mcat/physical-processes/force-of-tension/tension-part-2/", "id": "zwDJ1wVr7Is", "title": "Introduction to tension (part 2)", "kind": "Video", "description": "A slightly more difficult tension problem.", "slug": "tension-part-2"}, {"path": "khan/test-prep/mcat/physical-processes/force-of-tension/tension-in-an-accelerating-system-and-pie-in-the-face/", "id": "52wxpYnS64U", "title": "Tension in an accelerating system and pie in the face", "kind": "Video", "description": "The second part to the complicated problem. We figure out the tension in the wire connecting the two masses. Then we figure our how much we need to accelerate a pie for it to safely reach a man's face.", "slug": "tension-in-an-accelerating-system-and-pie-in-the-face"}], "in_knowledge_map": false, "description": "4A: Let\u2019s picture an adventurous rock-climber hanging at the edge of a cliff. Gravity is providing a downward force. The only reason he does not fall down to the valley below is due to the force of tension upward, provided by the muscles of his arm. You will work through some interesting real-world problems involving tensile forces in these tutorials.", "node_slug": "force-of-tension", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/force-of-tension", "extended_slug": "test-prep/mcat/physical-processes/force-of-tension", "kind": "Topic", "slug": "force-of-tension"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/", "id": "forces-on-inclined-planes", "hide": false, "title": "Forces on inclined planes", "child_data": [{"kind": "Exercise", "id": "x665cade1"}, {"kind": "Video", "id": "123032796"}, {"kind": "Video", "id": "x143370ae"}, {"kind": "Video", "id": "123032792"}, {"kind": "Video", "id": "123032797"}, {"kind": "Video", "id": "x964428a2"}, {"kind": "Video", "id": "123032798"}, {"kind": "Video", "id": "123032793"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/forces-on-inclined-planes-zheng/", "id": "forces-on-inclined-planes-Zheng", "title": "Forces on inclined planes questions", "description": "Questions about forces on inclined planes", "slug": "forces-on-inclined-planes-zheng", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/inclined-plane-force-components/", "id": "TC23wD34C7k", "title": "Inclined plane force components", "kind": "Video", "description": "Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane", "slug": "inclined-plane-force-components"}, {"path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/force-of-friction-keeping-the-block-stationary-edited/", "id": "rMklxFGEClE", "title": "Force of friction keeping the block stationary", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "force-of-friction-keeping-the-block-stationary-edited"}, {"path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/ice-accelerating-down-an-incline/", "id": "Mz2nDXElcoM", "title": "Ice accelerating down an incline", "kind": "Video", "description": "Figuring out the acceleration of ice down a plane made of ice", "slug": "ice-accelerating-down-an-incline"}, {"path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/correction-of-force-of-friction-keeping-the-block-stationary/", "id": "BukTc4q9BMc", "title": "Correction to force of friction keeping the block stationary", "kind": "Video", "description": "Correction to Force of Friction Keeping the Block Stationary", "slug": "correction-of-force-of-friction-keeping-the-block-stationary"}, {"path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/force-of-friction-keeping-velocity-constant-edited/", "id": "JxZ8WGsuuvI", "title": "Force of friction keeping velocity constant", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "force-of-friction-keeping-velocity-constant-edited"}, {"path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/intuition-on-static-and-kinetic-friction-comparisons/", "id": "J9BWNiOSGlc", "title": "Intuition on static and kinetic friction comparisons", "kind": "Video", "description": "Why static friction is harder to overcome than kinetic friction", "slug": "intuition-on-static-and-kinetic-friction-comparisons"}, {"path": "khan/test-prep/mcat/physical-processes/forces-on-inclined-planes/static-and-kinetic-friction-example/", "id": "ZA_D4O6l1lo", "title": "Static and kinetic friction example", "kind": "Video", "description": "Thinking about the coefficients of static and kinetic friction", "slug": "static-and-kinetic-friction-example"}], "in_knowledge_map": false, "description": "4A: If you've ever moved from one town to another, you are likely familiar with inclined planes. When you push up that 50 pound box into the long flatbed truck , there are several forces at play: the weight of the box, the frictional force between the box and the ramp, and the force of your push. We will explain how these forces interact so next time the move won't be so back-breaking.", "node_slug": "forces-on-inclined-planes", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/forces-on-inclined-planes", "extended_slug": "test-prep/mcat/physical-processes/forces-on-inclined-planes", "kind": "Topic", "slug": "forces-on-inclined-planes"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/", "id": "work-and-energy-mcat", "hide": false, "title": "Work and energy", "child_data": [{"kind": "Exercise", "id": "x3445f2f6"}, {"kind": "Video", "id": "25587"}, {"kind": "Video", "id": "25589"}, {"kind": "Video", "id": "x4302d2d1"}, {"kind": "Video", "id": "xe52a1e85"}, {"kind": "Video", "id": "xb0fc6be7"}, {"kind": "Video", "id": "25593"}, {"kind": "Video", "id": "25637"}, {"kind": "Video", "id": "25639"}, {"kind": "Video", "id": "25641"}, {"kind": "Video", "id": "x19f2d6c4"}, {"kind": "Article", "id": "x2a456bbd"}, {"kind": "Video", "id": "x7ed35f44"}, {"kind": "Video", "id": "x3e147b11"}, {"kind": "Video", "id": "25595"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/work-and-energy-questions/", "id": "work-and-energy-questions", "title": "Work and energy questions", "description": "Questions pertaining to work and energy", "slug": "work-and-energy-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/introduction-to-work-and-energy/", "id": "2WS1sG9fhOk", "title": "Introduction to work and energy", "kind": "Video", "description": "Introduction to work and energy", "slug": "introduction-to-work-and-energy"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/work-and-energy-part-2/", "id": "3mier94pbnU", "title": "Work and energy (part 2)", "kind": "Video", "description": "More on work. Introduction to Kinetic and Potential Energies.", "slug": "work-and-energy-part-2"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/work-and-the-work-energy-principle/", "id": "30o4omX5qfo", "title": "Work and the work-energy principle", "kind": "Video", "slug": "work-and-the-work-energy-principle"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/work-example-problems/", "id": "udgMh3Y-dTk", "title": "Work example problems", "kind": "Video", "slug": "work-example-problems"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/conservation-of-energy-2/", "id": "3ZdZ8VgyKnc", "title": "Conservation of energy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "conservation-of-energy-2"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/work-energy-problem-with-friction/", "id": "YvacYWgygaA", "title": "Work/energy problem with friction", "kind": "Video", "description": "A conservation of energy problem where all of the energy is not conserved.", "slug": "work-energy-problem-with-friction"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/intro-to-springs-and-hooke-s-law/", "id": "ZzwuHS9ldbY", "title": "Intro to springs and Hooke's law", "kind": "Video", "description": "Introduction to Hooke's Law", "slug": "intro-to-springs-and-hooke-s-law"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/potential-energy-stored-in-a-spring/", "id": "eVl5zs6Lqy0", "title": "Potential energy stored in a spring", "kind": "Video", "description": "Work needed to compress a spring is the same thing as the potential energy stored in the compressed spring.", "slug": "potential-energy-stored-in-a-spring"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/spring-potential-energy-example-mistake-in-math/", "id": "P3QV9ktuYlQ", "title": "Spring potential energy example (mistake in math)", "kind": "Video", "description": "A spring, a frozen loop-d-loop and more! (See if you can find the mistake I made and get the right answer!)", "slug": "spring-potential-energy-example-mistake-in-math"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/work-as-the-transfer-of-energy/", "id": "sZG-zHkGR4U", "title": "Work as the transfer of energy", "kind": "Video", "slug": "work-as-the-transfer-of-energy"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/conservative-forces/", "id": "qWR7SBsnLwo", "title": "Conservative forces", "kind": "Video", "slug": "conservative-forces"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/power/", "id": "RpbxIG5HTf4", "title": "Power", "kind": "Video", "slug": "power"}, {"path": "khan/test-prep/mcat/physical-processes/work-and-energy-mcat/introduction-to-mechanical-advantage/", "id": "pfzJ-z5Ij48", "title": "Introduction to mechanical advantage", "kind": "Video", "description": "Introduction to simple machines, mechanical advantage and moments.", "slug": "introduction-to-mechanical-advantage"}], "in_knowledge_map": false, "description": "4A: Work doesn\u2019t always have to break your back. In physics, it has a different meaning. When a force is applied to an object and results in displacement, work has been done. When an apple falls from a tree, gravity has done work on the object as it descends earthward. And as work is done by gravity on the object, its gravitational potential energy is converted into kinetic energy (which is also why it hurts as it lands on your head, hopefully resulting in a brilliant Newtonian idea). Let\u2019s get moving!", "node_slug": "work-and-energy-mcat", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/work-and-energy-mcat", "extended_slug": "test-prep/mcat/physical-processes/work-and-energy-mcat", "kind": "Topic", "slug": "work-and-energy-mcat"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/", "id": "fluids-at-rest", "hide": false, "title": "Fluids at rest", "child_data": [{"kind": "Exercise", "id": "x0bda61bc"}, {"kind": "Article", "id": "x1a36bb0b"}, {"kind": "Video", "id": "25649"}, {"kind": "Video", "id": "25651"}, {"kind": "Video", "id": "25653"}, {"kind": "Video", "id": "25655"}, {"kind": "Video", "id": "25657"}, {"kind": "Video", "id": "x797560f7"}, {"kind": "Video", "id": "xcdac65f7"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/fluids-at-rest-questions/", "id": "fluids-at-rest-questions", "title": "Fluids at rest questions", "description": "Fluids at rest questions", "slug": "fluids-at-rest-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/fluids-part-1/", "id": "Pn5YEMwQb4Y", "title": "Pressure and Pascal's principle (part 1)", "kind": "Video", "description": "Sal explains the difference between liquids and gasses (both fluids). He then starts a calculation of the work done on a liquid in a U-shaped container.", "slug": "fluids-part-1"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/fluids-part-2/", "id": "lWDtFHDVqqk", "title": "Pressure and Pascal's principle (part 2)", "kind": "Video", "description": "Sal finishes the calculation or work to determine the mechanical advantage in a U-shaped tube. He also explains pressure and Pascal's Principal.", "slug": "fluids-part-2"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/fluids-part-3/", "id": "5EWjlpc0S00", "title": "Pressure at a depth in a fluid", "kind": "Video", "description": "Sal derives the formula to determine the pressure at a specific depth in a fluid.", "slug": "fluids-part-3"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/fluids-part-4/", "id": "i6gz9VFyYks", "title": "Finding height of fluid in a barometer", "kind": "Video", "description": "Using our understanding of fluid pressure to figure out the height of a column of mercury.", "slug": "fluids-part-4"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/fluids-part-5/", "id": "vzID7ds600c", "title": "Archimedes principle and buoyant force", "kind": "Video", "description": "Introduction to Archimedes' principle and buoyant force.", "slug": "fluids-part-5"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/buoyant-force-example-problems-edited/", "id": "e5oGdNL1GkA", "title": "Buoyant force example problems edited", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "buoyant-force-example-problems-edited"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-at-rest/specific-gravity/", "id": "nVPrWz8Jfgo", "title": "Specific gravity", "kind": "Video", "description": "In this video David explains what specific gravity means. He also shows how to calculate the value for specific gravity and use it to determine the percent of an object that will be submerged while floating.", "slug": "specific-gravity"}], "in_knowledge_map": false, "description": "4B: Fluids can be fun even when they\u2019re not moving. A still pond has more going on with it than meets the eye - why exactly do you even float when you decide to jump in on a scalding summer day? It\u2019s because you displace a volume of water that provides a buoyant force upward, counteracting the downward pull of gravity. You will find out why the great Archimedes ran through the streets of Syracuse shouting \"eureka\" millennia ago in Ancient Greece as we also delve into the concepts of pressure, specific gravity, buoyancy, and Bernoulli's principle.", "node_slug": "fluids-at-rest", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/fluids-at-rest", "extended_slug": "test-prep/mcat/physical-processes/fluids-at-rest", "kind": "Topic", "slug": "fluids-at-rest"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/", "id": "fluids-in-motion", "hide": false, "title": "Fluids in motion", "child_data": [{"kind": "Exercise", "id": "x2f9549f2"}, {"kind": "Video", "id": "25661"}, {"kind": "Video", "id": "25663"}, {"kind": "Video", "id": "25665"}, {"kind": "Video", "id": "25667"}, {"kind": "Video", "id": "25669"}, {"kind": "Video", "id": "25671"}, {"kind": "Video", "id": "x0934a85a"}, {"kind": "Video", "id": "x8b8f2b8c"}, {"kind": "Video", "id": "x1bb34950"}, {"kind": "Video", "id": "xb5f9185e"}, {"kind": "Video", "id": "1192377802"}, {"kind": "Video", "id": "1036157588"}, {"kind": "Video", "id": "1036250178"}, {"kind": "Video", "id": "1036166642"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-in-motion-questions/", "id": "fluids-in-motion-questions", "title": "Fluids in motion questions", "description": "Fluids in motion questions", "slug": "fluids-in-motion-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-7/", "id": "G4CgOF4ccXk", "title": "Volume flow rate and equation of continuity", "kind": "Video", "description": "Sal introduces the notion of moving fluids and laminar flow. Then he uses the incompressibility of a liquid to show that the volume flow rate (flux) must remain constant. Sal then derives the equation of continuity in terms of the area and speed.", "slug": "fluids-part-7"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-8/", "id": "uqyLOuAzbvo", "title": "Bernoulli's equation (part 1)", "kind": "Video", "description": "This is the first of two videos where Sal derives Bernoulli's equation.", "slug": "fluids-part-8"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-9/", "id": "QX2YLR09Q78", "title": "Bernoulli's equation (part 2)", "kind": "Video", "description": "This is the second of two videos where Sal derives Bernoulli's equation. In the second half of the video Sal also begins an example problem where liquid exits a hole in a container.", "slug": "fluids-part-9"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-10/", "id": "NGpJPz44JYc", "title": "Bernoulli's equation (part 3)", "kind": "Video", "description": "Sal finishes the example problem where liquid exits a hole in a container.", "slug": "fluids-part-10"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-11/", "id": "HnfBFeLunk4", "title": "Bernoulli's equation (part 4)", "kind": "Video", "description": "Clarification of, and more thoughts on, the Bernoulli's equation example problem where liquid exits a hole in a container.", "slug": "fluids-part-11"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/fluids-part-12/", "id": "xlJYYM5TWoA", "title": "Bernoulli's example problem", "kind": "Video", "description": "Sal solves a Bernoulli's equation example problem where fluid is moving through a pipe of varying diameter.", "slug": "fluids-part-12"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/viscosity-and-poiseuille-flow/", "id": "G3bO8RcRgxQ", "title": "Viscosity and Poiseuille flow", "kind": "Video", "description": "David explains the concept of viscosity, viscous force, and Poiseuille's law.", "slug": "viscosity-and-poiseuille-flow"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/turbulence-at-high-velocities-and-reynolds-number/", "id": "ZcaPndok1hc", "title": "Turbulence at high velocities and Reynold's number", "kind": "Video", "description": "In this video David explains how the Reynold's number allows you to determine the speed at which fluid flow becomes turbulent.", "slug": "turbulence-at-high-velocities-and-reynolds-number"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/surface-tension-and-adhesion/", "id": "pmagWO-kQ0M", "title": "Surface Tension and Adhesion", "kind": "Video", "description": "David explains the concepts of surface tension, cohesion, and adhesion.", "slug": "surface-tension-and-adhesion"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/venturi-effect-and-pitot-tubes/", "id": "Qz1g6kqvUG8", "title": "Venturi effect and Pitot tubes", "kind": "Video", "description": "David explains the Venturi effect and the role and function of Pitot tubes.", "slug": "venturi-effect-and-pitot-tubes"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/two-circulations-in-the-body/", "id": "K57qjYYjgIY", "title": "Two circulations in the body", "kind": "Video", "description": "Learn the difference between the pulmonary and systemic circulatory systems in the body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "two-circulations-in-the-body"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/arteries-vs-veins-what-s-the-difference/", "id": "7b6LRebCgb4", "title": "Arteries vs. veins - what's the difference?", "kind": "Video", "description": "Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arteries-vs-veins-what-s-the-difference"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/resistance-in-a-tube/", "id": "8X7yEzgurP8", "title": "Resistance in a tube", "kind": "Video", "description": "Learn how the size of a tube (it's radius) is related to its resistance to something flowing through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "resistance-in-a-tube"}, {"path": "khan/test-prep/mcat/physical-processes/fluids-in-motion/putting-it-all-together-pressure-flow-and-resistance/", "id": "F2uzWHppVrk", "title": "Putting it all together: Pressure, flow, and resistance", "kind": "Video", "description": "See how pressure, flow, and resistance relate to one another and how they each affect the human body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "putting-it-all-together-pressure-flow-and-resistance"}], "in_knowledge_map": false, "description": "4B: In these videos you'll learn more about fluids. Bernoulli's equation will describe the behavior of fluids in motion. The Venturi effect, turbulence, surface tension and viscosity will be discussed as well as the difference between arteries and veins.", "node_slug": "fluids-in-motion", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/fluids-in-motion", "extended_slug": "test-prep/mcat/physical-processes/fluids-in-motion", "kind": "Topic", "slug": "fluids-in-motion"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/gas-phase/", "id": "gas-phase", "hide": false, "title": "Gas phase", "child_data": [{"kind": "Exercise", "id": "x5138805d"}, {"kind": "Video", "id": "xfe49b572"}, {"kind": "Video", "id": "x71043bcd"}, {"kind": "Video", "id": "x842044ab"}, {"kind": "Video", "id": "xa6b20b55"}, {"kind": "Video", "id": "x5b496e70"}, {"kind": "Video", "id": "x5ab8b71e"}, {"kind": "Video", "id": "xf5de1dc3"}, {"kind": "Video", "id": "x692ec482"}, {"kind": "Video", "id": "xe9d2f7f8"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/gas-phase/gas-phase-questions/", "id": "gas-phase-questions", "title": "Gas phase questions", "description": "Gas phase questions", "slug": "gas-phase-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/gas-phase/absolute-temperature-and-the-kelvin-scale/", "id": "eEJqaNaq9v8", "title": "Absolute temperature and the kelvin scale", "kind": "Video", "slug": "absolute-temperature-and-the-kelvin-scale"}, {"path": "khan/test-prep/mcat/physical-processes/gas-phase/pressure-and-the-simple-mercury-barometer/", "id": "kkUvU-elGtw", "title": "Pressure and the simple mercury barometer", "kind": "Video", "slug": "pressure-and-the-simple-mercury-barometer"}, {"path": "khan/test-prep/mcat/physical-processes/gas-phase/definition-of-an-ideal-gas-ideal-gas-law/", "id": "xDh4grm_ZSY", "title": "Definition of an ideal gas, ideal gas law", "kind": "Video", "slug": "definition-of-an-ideal-gas-ideal-gas-law"}, {"path": "khan/test-prep/mcat/physical-processes/gas-phase/derivation-of-gas-constants-using-molar-volume-and-stp/", "id": "dfZ9_vFwCA4", "title": "Derivation of gas constants using molar volume and STP", "kind": "Video", "slug": "derivation-of-gas-constants-using-molar-volume-and-stp"}, {"path": "khan/test-prep/mcat/physical-processes/gas-phase/boyles-law/", "id": "PIM4G3IZk5Y", "title": "Boyle's law", "kind": "Video", "slug": "boyles-law"}, {"path": "khan/test-prep/mcat/physical-processes/gas-phase/charles-law/", "id": "o52BW3B4efc", "title": "Charles's law", "kind": "Video", "slug": "charles-law"}, {"path": "khan/test-prep/mcat/physical-processes/gas-phase/avogadros-law/", "id": "54--44LhQRU", "title": "Avogadro's law", "kind": "Video", "slug": "avogadros-law"}, {"path": "khan/test-prep/mcat/physical-processes/gas-phase/real-gases-and-the-van-der-waals-equation/", "id": "WomsUEVVtCk", "title": "Real gases and the van der Waals equation", "kind": "Video", "slug": "real-gases-and-the-van-der-waals-equation"}, {"path": "khan/test-prep/mcat/physical-processes/gas-phase/partial-pressure-2/", "id": "ch61milcTUU", "title": "Partial pressure", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "partial-pressure-2"}], "in_knowledge_map": false, "description": "4B: Imagine taking a balloon and heating it up by putting it in a sauna. What would happen? Gases, though you may not be able to see them, are perpetually in motion. You will encounter them if you ever frequent an operating room, as the anesthesiologist holds in his arsenal several gases with doze-inducing properties. We will walk through the history and application of the ideal gas law to real-world problems as you also come to appreciate the meaning of partial pressures and STP in these tutorials.", "node_slug": "gas-phase", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/gas-phase", "extended_slug": "test-prep/mcat/physical-processes/gas-phase", "kind": "Topic", "slug": "gas-phase"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/kinetic-molecular-theory-of-gas/", "id": "kinetic molecular theory of gas", "hide": false, "title": "Kinetic molecular theory of gases", "child_data": [{"kind": "Exercise", "id": "x02bd9a1d"}, {"kind": "Video", "id": "x9135ec72"}, {"kind": "Video", "id": "x2f230069"}, {"kind": "Video", "id": "xe949cc39"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/kinetic-molecular-theory-of-gas/gas-phase-quiz/", "id": "gas-phase-quiz", "title": "Gas phase quiz", "description": "Gas phase quiz", "slug": "gas-phase-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/kinetic-molecular-theory-of-gas/boltzmanns-constant/", "id": "SIDRXhdQ0qQ", "title": "Boltzmann's constant", "kind": "Video", "slug": "boltzmanns-constant"}, {"path": "khan/test-prep/mcat/physical-processes/kinetic-molecular-theory-of-gas/heat-capacity-at-constant-volume-and-pressure/", "id": "ohxQKCbCfow", "title": "Heat capacity at constant volume and pressure", "kind": "Video", "slug": "heat-capacity-at-constant-volume-and-pressure"}, {"path": "khan/test-prep/mcat/physical-processes/kinetic-molecular-theory-of-gas/kinetic-molecular-theory-of-gases/", "id": "GxaZZMg30cQ", "title": "Kinetic molecular theory of gases", "kind": "Video", "slug": "kinetic-molecular-theory-of-gases"}], "in_knowledge_map": false, "description": "4A: Though we may not be able to always visualize them, gases are comprised of atoms and molecules. We\u2019ll explore the molecular behavior that determines the pressure and temperature of a gas. In addition, we will discuss the first law of thermodynamics and heat capacity.", "node_slug": "kinetic molecular theory of gas", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/kinetic molecular theory of gas", "extended_slug": "test-prep/mcat/physical-processes/kinetic molecular theory of gas", "kind": "Topic", "slug": "kinetic-molecular-theory-of-gas"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/electrostatics-1/", "id": "electrostatics-1", "hide": false, "title": "Electrostatics", "child_data": [{"kind": "Exercise", "id": "x1d6c83a6"}, {"kind": "Video", "id": "x6f14be01"}, {"kind": "Video", "id": "x650c1508"}, {"kind": "Video", "id": "x7abf73f6"}, {"kind": "Video", "id": "x337984d0"}, {"kind": "Video", "id": "25685"}, {"kind": "Article", "id": "xce7ccb67"}, {"kind": "Video", "id": "25691"}, {"kind": "Video", "id": "25695"}, {"kind": "Video", "id": "xac18fc84"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/electrostatics-1/electrostatics-questions/", "id": "electrostatics-questions", "title": "Electrostatics questions", "description": "Questions pertaining to electrostatics", "slug": "electrostatics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/electrostatics-1/triboelectric-effect-and-charge/", "id": "IDQYakHRAG8", "title": "Triboelectric effect and charge", "kind": "Video", "slug": "triboelectric-effect-and-charge"}, {"path": "khan/test-prep/mcat/physical-processes/electrostatics-1/coulombs-law/", "id": "2GQTfpDE9DQ", "title": "Coulomb's Law", "kind": "Video", "slug": "coulombs-law"}, {"path": "khan/test-prep/mcat/physical-processes/electrostatics-1/conservation-of-charge/", "id": "Sn5CwAODVdI", "title": "Conservation of Charge", "kind": "Video", "slug": "conservation-of-charge"}, {"path": "khan/test-prep/mcat/physical-processes/electrostatics-1/conductors-and-insulators/", "id": "ZgDIX2GOaxQ", "title": "Conductors and Insulators", "kind": "Video", "slug": "conductors-and-insulators"}, {"path": "khan/test-prep/mcat/physical-processes/electrostatics-1/electrostatics-part-2/", "id": "0YOGrTNgGhE", "title": "Electric field", "kind": "Video", "description": "Electric Fields", "slug": "electrostatics-part-2"}, {"path": "khan/test-prep/mcat/physical-processes/electrostatics-1/electric-potential-energy/", "id": "elJUghWSVh4", "title": "Electric potential energy", "kind": "Video", "description": "Introduction to electric potential", "slug": "electric-potential-energy"}, {"path": "khan/test-prep/mcat/physical-processes/electrostatics-1/voltage/", "id": "zqGvUbvVQXg", "title": "Voltage", "kind": "Video", "description": "Difference between electrical potential (voltage) and electrical potential energy", "slug": "voltage"}, {"path": "khan/test-prep/mcat/physical-processes/electrostatics-1/electric-potential-at-a-point-in-space/", "id": "ks1B1_umFk8", "title": "Electric potential at a point in space", "kind": "Video", "slug": "electric-potential-at-a-point-in-space"}], "in_knowledge_map": false, "description": "4C: Ouch! have you ever heard of people being struck by lightning? Have you ever seen a defibrillator used to shock a patient back from the jaws of death? These amazing phenomena are possible due to the action of electric charges. Like masses, electric charges can have an associated force and a potential energy within a field. In these tutorials, you will discover how electric charges interact with one another and will arrive at an understanding of the concepts of electric force, fields, and potential.", "node_slug": "electrostatics-1", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/electrostatics-1", "extended_slug": "test-prep/mcat/physical-processes/electrostatics-1", "kind": "Topic", "slug": "electrostatics-1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/current-and-resistance/", "id": "current-and-resistance", "hide": false, "title": "Current and resistance", "child_data": [{"kind": "Exercise", "id": "xc55d71b4"}, {"kind": "Article", "id": "x4c38c73a"}, {"kind": "Video", "id": "25699"}, {"kind": "Video", "id": "25701"}, {"kind": "Video", "id": "25703"}, {"kind": "Video", "id": "25705"}, {"kind": "Video", "id": "x2d278559"}, {"kind": "Video", "id": "x40f10fec"}, {"kind": "Video", "id": "xa8591b23"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/current-and-resistance/current-and-resistance-questions/", "id": "current-and-resistance-questions", "title": "Current and resistance questions", "description": "Questions pertaining to current and resistance", "slug": "current-and-resistance-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/current-and-resistance/circuits-part-1/", "id": "3o8_EARoMtg", "title": "Introduction to circuits and Ohm's law", "kind": "Video", "description": "Introduction to electricity, circuits, current and resistance", "slug": "circuits-part-1"}, {"path": "khan/test-prep/mcat/physical-processes/current-and-resistance/circuits-part-2/", "id": "7vHh1sfZ5KE", "title": "Resistors in series", "kind": "Video", "description": "Resistors in series", "slug": "circuits-part-2"}, {"path": "khan/test-prep/mcat/physical-processes/current-and-resistance/circuits-part-3/", "id": "ZrMw7P6P2Gw", "title": "Resistors in parallel", "kind": "Video", "description": "Resistors in parallel", "slug": "circuits-part-3"}, {"path": "khan/test-prep/mcat/physical-processes/current-and-resistance/circuits-part-4/", "id": "3NcIK0s3IwU", "title": "Example: Analyzing a more complex resistor circuit", "kind": "Video", "description": "A hairy resistance problem", "slug": "circuits-part-4"}, {"path": "khan/test-prep/mcat/physical-processes/current-and-resistance/resistivity-and-conductivity/", "id": "4rsswT_Rv1M", "title": "Resistivity and conductivity", "kind": "Video", "slug": "resistivity-and-conductivity"}, {"path": "khan/test-prep/mcat/physical-processes/current-and-resistance/electrolytic-conductivity/", "id": "uUhBEufepWk", "title": "Electrolytic conductivity", "kind": "Video", "slug": "electrolytic-conductivity"}, {"path": "khan/test-prep/mcat/physical-processes/current-and-resistance/voltmeters-and-ammeters/", "id": "yE3eQ6q39f4", "title": "Voltmeters and Ammeters", "kind": "Video", "slug": "voltmeters-and-ammeters"}], "in_knowledge_map": false, "description": "Always follow the path of least resistance. In these videos you will learn how to interpret circuit diagrams and the rules that govern the flow of electrons - or current - through wires and resistors.", "node_slug": "current-and-resistance", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/current-and-resistance", "extended_slug": "test-prep/mcat/physical-processes/current-and-resistance", "kind": "Topic", "slug": "current-and-resistance"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/capacitors/", "id": "capacitors", "hide": false, "title": "Capacitors", "child_data": [{"kind": "Exercise", "id": "x42387bdc"}, {"kind": "Article", "id": "x7c1a6506"}, {"kind": "Article", "id": "x60f85f2c"}, {"kind": "Video", "id": "xc64de00d"}, {"kind": "Video", "id": "25697"}, {"kind": "Video", "id": "x28f1d646"}, {"kind": "Video", "id": "x276a1169"}, {"kind": "Video", "id": "x9e833752"}, {"kind": "Video", "id": "xb0101987"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/capacitors/capacitors-questions/", "id": "capacitors-questions", "title": "Capacitors questions", "description": "Questions pertaining to capacitors", "slug": "capacitors-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/capacitors/capacitors-and-capacitance/", "id": "u-jigaMJT10", "title": "Capacitors and capacitance", "kind": "Video", "description": "A basic overview of capacitors and capacitance. By David Santo Pietro.", "slug": "capacitors-and-capacitance"}, {"path": "khan/test-prep/mcat/physical-processes/capacitors/capacitance/", "id": "ngOC4eUQl8Y", "title": "Capacitance", "kind": "Video", "description": "Introduction to the capacitance of a two place capacitor.", "slug": "capacitance"}, {"path": "khan/test-prep/mcat/physical-processes/capacitors/energy-capacitor/", "id": "SIU_9SMd5q0", "title": "Energy of a capacitor", "kind": "Video", "description": "This video explains the potential of a capacitor and how they function in a circuit. By David Santo Pietro.", "slug": "energy-capacitor"}, {"path": "khan/test-prep/mcat/physical-processes/capacitors/capacitors-series/", "id": "-MaD9Ycy3a4", "title": "Capacitors in series", "kind": "Video", "description": "The effect on voltage and current when capacitors are constructed in series in a circuit. By David Santo Pietro.", "slug": "capacitors-series"}, {"path": "khan/test-prep/mcat/physical-processes/capacitors/capacitors-parallel/", "id": "P-1mWGeJjmg", "title": "Capacitors in parallel", "kind": "Video", "description": "The effect on voltage and current when capacitors are constructed in parallel in a circuit. By David Santo Pietro.", "slug": "capacitors-parallel"}, {"path": "khan/test-prep/mcat/physical-processes/capacitors/dielectrics-capacitors/", "id": "rkntp3_cZl4", "title": "Dielectrics in capacitors", "kind": "Video", "description": "How dielectrics function in circuits. By David Santo Pietro.", "slug": "dielectrics-capacitors"}], "in_knowledge_map": false, "description": "4C: Capacitors are simply components which store electrostatic energy in a field. They are similar to batteries - however, capacitors only store new electricity rather than producing it through a chemical reaction like a battery does. You will walk through a mathematical description of how capacitors function and how they work within electrical circuits.", "node_slug": "capacitors", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/capacitors", "extended_slug": "test-prep/mcat/physical-processes/capacitors", "kind": "Topic", "slug": "capacitors"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/magnetism-mcat/", "id": "magnetism-mcat", "hide": false, "title": "Magnetism", "child_data": [{"kind": "Article", "id": "x220a7df4"}, {"kind": "Exercise", "id": "x70b03081"}, {"kind": "Video", "id": "x48de90e0"}, {"kind": "Video", "id": "x571d6aa7"}, {"kind": "Video", "id": "x47aed94f"}, {"kind": "Video", "id": "xd89068a8"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/magnetism-mcat/magnetism-questions/", "id": "magnetism-questions", "title": "Magnetism questions", "description": "Questions pertaining to magnetism", "slug": "magnetism-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/magnetism-mcat/magnetism-part-1/", "id": "n_npNIK1kMc", "title": "Magnetism - Part 1", "kind": "Video", "description": "Introduction to magnetism: lodestones; like poles repel, opposite poles attract; no magnetic monopoles; magnetic spin.", "slug": "magnetism-part-1"}, {"path": "khan/test-prep/mcat/physical-processes/magnetism-mcat/magnetism-part-2/", "id": "wzZfyhaUvfY", "title": "Magnetism - Part 2", "kind": "Video", "description": "The magnetic field; north and south poles; relation between electrostatics and magnetics; the magnetic force; the Tesla.", "slug": "magnetism-part-2"}, {"path": "khan/test-prep/mcat/physical-processes/magnetism-mcat/magnetism-part-3/", "id": "22HqkuYT270", "title": "Magnetism - Part 3", "kind": "Video", "description": "Applying the magnetic force equation to a proton moving in a magnetic field, and learning that a magnetic field induces circular motion", "slug": "magnetism-part-3"}, {"path": "khan/test-prep/mcat/physical-processes/magnetism-mcat/magnetism-part-4/", "id": "S6PZYpgoLjQ", "title": "Magnetism - Part 4", "kind": "Video", "description": "The magnetic force as a centripetal force: calculating the radius of the path traveled by a proton. Applications: cathode ray tube (CRT) monitors, cyclotrons in particle accelerators.", "slug": "magnetism-part-4"}], "in_knowledge_map": false, "description": "Magnets - how do they work? Guaranteed way to win a nobel prize: find a magnetic monopole. If you don\u2019t know what that is, these videos would be a good place to start. Notable achievements of magnets - they put current in our homes, the protect us from dangerous cosmic rays, and they make particles at CERN go really really fast so we can learn more about science!", "node_slug": "magnetism-mcat", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/magnetism-mcat", "extended_slug": "test-prep/mcat/physical-processes/magnetism-mcat", "kind": "Topic", "slug": "magnetism-mcat"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/", "id": "intro-electrochemistry-mcat", "hide": false, "title": "Electrochemistry", "child_data": [{"kind": "Exercise", "id": "x710d5599"}, {"kind": "Article", "id": "x4c658724"}, {"kind": "Video", "id": "xfc2d5f2d"}, {"kind": "Video", "id": "xe7416dc9"}, {"kind": "Video", "id": "x1773beb6"}, {"kind": "Video", "id": "x13a28207"}, {"kind": "Video", "id": "x5ae1e5fb"}, {"kind": "Video", "id": "x9f0707ce"}, {"kind": "Video", "id": "xb4b0e758"}, {"kind": "Video", "id": "xa118949b"}, {"kind": "Video", "id": "x1c447583"}, {"kind": "Video", "id": "x3ab031b3"}, {"kind": "Video", "id": "xeeac86c0"}, {"kind": "Video", "id": "x98181192"}, {"kind": "Video", "id": "x0442f790"}, {"kind": "Video", "id": "x7944a39b"}, {"kind": "Video", "id": "x35034377"}, {"kind": "Video", "id": "x7ada2742"}, {"kind": "Video", "id": "xe471248d"}, {"kind": "Video", "id": "x51f5d849"}, {"kind": "Video", "id": "xc191ac11"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/electrochemistry-questions/", "id": "electrochemistry-questions", "title": "Electrochemistry questions", "description": "Questions pertaining to electrochemistry", "slug": "electrochemistry-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/redox-reaction-from-dissolving-zinc-in-copper-sulfate/", "id": "wVMe8ZmCZo0", "title": "Redox reaction from dissolving zinc in copper sulfate", "kind": "Video", "description": "What happens when you add zinc to a solution of copper sulfate? Identifying the half reactions to see what got oxidized and reduced.", "slug": "redox-reaction-from-dissolving-zinc-in-copper-sulfate"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/galvanic-cell-voltaic-cell/", "id": "9Xncz_mMc5g", "title": "Introduction to galvanic/voltaic cells", "kind": "Video", "description": "How to use a redox reaction to construct a galvanic/voltaic cell to produce a flow of current.. Shows the flow of electrons and ions, and explains the role of the salt bridge.", "slug": "galvanic-cell-voltaic-cell"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/electrodes-and-voltage-of-galvanic-cell/", "id": "m0SFJt_0v28", "title": "Electrodes and voltage of Galvanic cell", "kind": "Video", "description": "Identifying the anode and cathode in a galvanic cell, and calculating the voltage using standard electrode potentials.", "slug": "electrodes-and-voltage-of-galvanic-cell"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/shorthand-notation-for-galvanicvoltaic-cells/", "id": "xHuLZHasldg", "title": "Shorthand notation for galvanic/voltaic cells", "kind": "Video", "description": "How to describe cell using shorthand notation.", "slug": "shorthand-notation-for-galvanicvoltaic-cells"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/free-energy-and-cell-potential-edited/", "id": "puJN5OuzXeY", "title": "Free energy and cell potential", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "free-energy-and-cell-potential-edited"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/standard-reduction-potentials/", "id": "oAOq55MPJpM", "title": "Standard reduction potentials", "kind": "Video", "description": "How to use a table of standard reduction potentials to calculate standard cell potential. Identifying trends in oxidizing and reducing agent strength.", "slug": "standard-reduction-potentials"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/voltage-as-an-intensive-property-edited/", "id": "WegXPG-h8Ng", "title": "Voltage as an intensive property", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "voltage-as-an-intensive-property-edited"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/using-reduction-potentials/", "id": "79OmpES_9OE", "title": "Using reduction potentials", "kind": "Video", "description": "Example of using table of standard reduction potentials to calculate standard cell potential.", "slug": "using-reduction-potentials"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/spontaneity-and-redox-reactions/", "id": "sorB6XFJ8Jc", "title": "Spontaneity and redox reactions", "kind": "Video", "description": "Using standard cell potential to predict whether a redox reaction will be spontaneous under standard conditions.", "slug": "spontaneity-and-redox-reactions"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/standard-cell-potential-and-the-equilibrium-constant-edited/", "id": "v-Drg73XrS4", "title": "Standard cell potential and the equilibrium constant", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "standard-cell-potential-and-the-equilibrium-constant-edited"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/calculating-the-equilibrium-constant-from-the-standard-cell-potential-edited/", "id": "zSIJcGPIzro", "title": "Calculating the equilibrium constant from the standard cell potential edited", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "calculating-the-equilibrium-constant-from-the-standard-cell-potential-edited"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/nerst-equation-edited/", "id": "5Ixp_0r5YWk", "title": "Nerst equation", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "nerst-equation-edited"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/using-the-nernst-equation/", "id": "WqsJNtBEKtg", "title": "Using the Nernst equation", "kind": "Video", "description": "Using the Nernst equation to calculate the cell potential when concentrations are not standard conditions.", "slug": "using-the-nernst-equation"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/concentration-cell-edited/", "id": "xdarp2VBwNk", "title": "Concentration cell", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "concentration-cell-edited"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/introduction-to-electrolysis/", "id": "1tvvSUySfls", "title": "Introduction to electrolysis", "kind": "Video", "description": "Comparing a voltaic cell to an electrolytic cell.", "slug": "introduction-to-electrolysis"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/quantiative-electrolysis-edited/", "id": "rzkgZWxT4UM", "title": "Quantiative electrolysis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "quantiative-electrolysis-edited"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/electrolysis-of-molten-sodium-chloride-edited/", "id": "S7C-Q-RkX0I", "title": "Electrolysis of molten sodium chloride edited", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "electrolysis-of-molten-sodium-chloride-edited"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/lead-storage-battery/", "id": "PQ48N5jaG2w", "title": "Lead storage battery", "kind": "Video", "description": "Balancing the redox reaction (in acid) that occurs in a lead storage battery.", "slug": "lead-storage-battery"}, {"path": "khan/test-prep/mcat/physical-processes/intro-electrochemistry-mcat/nickel-cadmium-battery/", "id": "tUvpwdqdLlI", "title": "Nickel-cadmium battery", "kind": "Video", "description": "Balancing the redox reaction (in base) that occurs in a nickel-cadmium battery.", "slug": "nickel-cadmium-battery"}], "in_knowledge_map": false, "description": "Recall from chemistry that electrons are transferred between atoms during redox reactions. When redox reactions occur on a conductive surface, the moving electrons can be collected as a current, with the voltage being dependent on the species used in reaction. Find out how batteries are made and the chemistry that makes them function by watching these videos.", "node_slug": "intro-electrochemistry-mcat", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/intro-electrochemistry-mcat", "extended_slug": "test-prep/mcat/physical-processes/intro-electrochemistry-mcat", "kind": "Topic", "slug": "intro-electrochemistry-mcat"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/sound/", "id": "sound", "hide": false, "title": "Sound", "child_data": [{"kind": "Exercise", "id": "x784e0ac7"}, {"kind": "Article", "id": "x9237a525"}, {"kind": "Video", "id": "xa4f83089"}, {"kind": "Video", "id": "x3dd64aec"}, {"kind": "Video", "id": "x089b4e4b"}, {"kind": "Video", "id": "x96f7dd45"}, {"kind": "Video", "id": "x9d843e42"}, {"kind": "Video", "id": "xe87dc7c3"}, {"kind": "Video", "id": "x86c2a185"}, {"kind": "Video", "id": "x255e2941"}, {"kind": "Video", "id": "x1cd52325"}, {"kind": "Video", "id": "28120"}, {"kind": "Video", "id": "28121"}, {"kind": "Video", "id": "28122"}, {"kind": "Video", "id": "28123"}, {"kind": "Video", "id": "xcadea16e"}, {"kind": "Video", "id": "x9d1cacc7"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/sound/sound-questions-2/", "id": "sound-questions-2", "title": "Sound questions", "description": "Questions pertaining to sound", "slug": "sound-questions-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/sound/production-of-sound/", "id": "nGKffdaI4Pg", "title": "Production of sound", "kind": "Video", "slug": "production-of-sound"}, {"path": "khan/test-prep/mcat/physical-processes/sound/sound-properties-amplitude-period-frequency-wavelength/", "id": "-_xZZt99MzY", "title": "Sound Properties (Amplitude, Period, Frequency, Wavelength)", "kind": "Video", "slug": "sound-properties-amplitude-period-frequency-wavelength"}, {"path": "khan/test-prep/mcat/physical-processes/sound/speed-of-sound/", "id": "UgE2GIQwUCw", "title": "Speed of Sound", "kind": "Video", "slug": "speed-of-sound"}, {"path": "khan/test-prep/mcat/physical-processes/sound/relative-speed-of-sound-in-solids-liquids-and-gases/", "id": "yF4cvbAYjwI", "title": "Relative speed of sound in solids, liquids, and gases", "kind": "Video", "slug": "relative-speed-of-sound-in-solids-liquids-and-gases"}, {"path": "khan/test-prep/mcat/physical-processes/sound/decibel-scale/", "id": "_p-WyPg1sbU", "title": "Decibel Scale", "kind": "Video", "slug": "decibel-scale"}, {"path": "khan/test-prep/mcat/physical-processes/sound/why-do-sounds-get-softer/", "id": "46V8qqVRirk", "title": "Why do sounds get softer?", "kind": "Video", "slug": "why-do-sounds-get-softer"}, {"path": "khan/test-prep/mcat/physical-processes/sound/ultrasound-medical-imaging/", "id": "sTcqtljxLOk", "title": "Ultrasound medical imaging", "kind": "Video", "slug": "ultrasound-medical-imaging"}, {"path": "khan/test-prep/mcat/physical-processes/sound/standing-waves-in-tubes-part-2/", "id": "1S4DtuMY88I", "title": "Standing waves in tubes (part 2)", "kind": "Video", "slug": "standing-waves-in-tubes-part-2"}, {"path": "khan/test-prep/mcat/physical-processes/sound/standing-waves-in-tubes-part-1/", "id": "BhQUW9s-R8M", "title": "Standing waves in tubes (part 1)", "kind": "Video", "slug": "standing-waves-in-tubes-part-1"}, {"path": "khan/test-prep/mcat/physical-processes/sound/introduction-to-the-doppler-effect/", "id": "dc7l7Qqa8xk", "title": "Introduction to the doppler effect", "kind": "Video", "description": "Introduction to the Doppler Effect", "slug": "introduction-to-the-doppler-effect"}, {"path": "khan/test-prep/mcat/physical-processes/sound/doppler-effect-formula-for-observed-frequency/", "id": "kGrk6V8tWDY", "title": "Doppler effect formula for observed frequency", "kind": "Video", "description": "Doppler effect formula for observed frequency", "slug": "doppler-effect-formula-for-observed-frequency"}, {"path": "khan/test-prep/mcat/physical-processes/sound/doppler-effect-formula-when-source-is-moving-away/", "id": "KkJ0wL9f2VY", "title": "Doppler effect formula when source is moving away", "kind": "Video", "description": "Doppler effect formula when source is moving away", "slug": "doppler-effect-formula-when-source-is-moving-away"}, {"path": "khan/test-prep/mcat/physical-processes/sound/when-the-source-and-the-wave-move-at-the-same-velocity/", "id": "4Xgk3vusxT8", "title": "When the source and the wave move at the same velocity", "kind": "Video", "description": "When the source and the wave move at the same velocity", "slug": "when-the-source-and-the-wave-move-at-the-same-velocity"}, {"path": "khan/test-prep/mcat/physical-processes/sound/doppler-effect-for-a-moving-observer/", "id": "2TTu0TvB6N0", "title": "Doppler effect for a moving observer", "kind": "Video", "slug": "doppler-effect-for-a-moving-observer"}, {"path": "khan/test-prep/mcat/physical-processes/sound/doppler-effect-reflection-off-a-moving-object/", "id": "i4ZiV6NIs98", "title": "Doppler effect: reflection off a moving object", "kind": "Video", "slug": "doppler-effect-reflection-off-a-moving-object"}], "in_knowledge_map": false, "description": "4D:Some sounds are loud (high amplitude) like someone yelling, while others are soft (low amplitude) like a whisper. Some sounds are low pitched (low frequency) like a fog-horn, while others are high-pitched (high frequency) like a pager. You may have even noticed that the pitch of an ambulance rises as it rushes towards you and drops as it moves away. This is the Doppler effect in action. Here you will learn about the basics of sound properties such as wavelength, frequency, and amplitude.", "node_slug": "sound", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/sound", "extended_slug": "test-prep/mcat/physical-processes/sound", "kind": "Topic", "slug": "sound"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/", "id": "light-and-electromagnetic-radiation-questions", "hide": false, "title": "Light and electromagnetic radiation", "child_data": [{"kind": "Exercise", "id": "x3c80afbb"}, {"kind": "Video", "id": "x93657b33"}, {"kind": "Video", "id": "x38701d13"}, {"kind": "Article", "id": "x1cd3ec07"}, {"kind": "Video", "id": "x8a6b85c9"}, {"kind": "Video", "id": "x7aa60791"}, {"kind": "Video", "id": "xd2a6554e"}, {"kind": "Video", "id": "xb810086a"}, {"kind": "Video", "id": "x917c7a7b"}, {"kind": "Video", "id": "xdc1d3db2"}, {"kind": "Video", "id": "x1a496461"}, {"kind": "Video", "id": "x1408ebe1"}, {"kind": "Video", "id": "x6ddace9a"}, {"kind": "Video", "id": "x160e6164"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/light-and-electromagnetic-radiation-questions/", "id": "light-and-electromagnetic-radiation-questions", "title": "Light and electromagnetic radiation questions", "description": "Questions pertaining to light and electromagnetic radiation", "slug": "light-and-electromagnetic-radiation-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/electromagnetic-waves-and-the-electromagnetic-spectrum/", "id": "7eutept5h0Q", "title": "Electromagnetic waves and the electromagnetic spectrum", "kind": "Video", "slug": "electromagnetic-waves-and-the-electromagnetic-spectrum"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/polarization-of-light-linear-and-circular/", "id": "HH58VmUbOKM", "title": "Polarization of light, linear and circular", "kind": "Video", "slug": "polarization-of-light-linear-and-circular"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/wave-interference/", "id": "blur0MemUQA", "title": "Wave Interference", "kind": "Video", "slug": "wave-interference"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/youngs-double-split-part-1/", "id": "Pk6s2OlKzKQ", "title": "Young's Double slit part 1", "kind": "Video", "slug": "youngs-double-split-part-1"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/youngs-double-slit-part-2/", "id": "1abpdO27KTo", "title": "Young's Double slit part 2", "kind": "Video", "slug": "youngs-double-slit-part-2"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/youngs-double-slit-problem-solving/", "id": "5-2RZsU8e3U", "title": "Young's Double Slit problem solving", "kind": "Video", "slug": "youngs-double-slit-problem-solving"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/diffraction-grating/", "id": "F6dZjuw1KUo", "title": "Diffraction grating", "kind": "Video", "slug": "diffraction-grating"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/single-slit-interference/", "id": "7CmbItRjM-Y", "title": "Single Slit Interference", "kind": "Video", "slug": "single-slit-interference"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/more-on-single-slit-interference/", "id": "T-kgoxhFSmU", "title": "More on Single Slit Interference", "kind": "Video", "slug": "more-on-single-slit-interference"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/thin-film-interference-part-1/", "id": "oXowkdgJPO4", "title": "Thin Film Interference part 1", "kind": "Video", "slug": "thin-film-interference-part-1"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/thin-film-interference-part-2/", "id": "yWkga94iBzU", "title": "Thin Film Interference part 2", "kind": "Video", "slug": "thin-film-interference-part-2"}, {"path": "khan/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions/photon-energy/", "id": "Zqt3btS1FwE", "title": "Photon Energy E=hf", "kind": "Video", "slug": "photon-energy"}], "in_knowledge_map": false, "description": "4D: Believe it or not, light has both wave-like and particle-like properties, as evidenced by the concepts of polarization, interference, and the photon model. In this modern age of medicine, we have seen a rise in the clinical use of the laser (which actually stands for \u201clight amplification by stimulated emission of radiation\u201d). As we discuss theories outlined by geniuses like Max Planck several decades ago, you\u2019ll discover how light rays interfere in double slit, single slit, and diffraction gratings.", "node_slug": "light-and-electromagnetic-radiation-questions", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions", "extended_slug": "test-prep/mcat/physical-processes/light-and-electromagnetic-radiation-questions", "kind": "Topic", "slug": "light-and-electromagnetic-radiation-questions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/", "id": "Infrared-and-Ultraviolet-Visible-spectroscopy", "hide": false, "title": "Infrared and Ultraviolet/Visible spectroscopy", "child_data": [{"kind": "Exercise", "id": "xa3f0b560"}, {"kind": "Video", "id": "x94a9caf3"}, {"kind": "Video", "id": "xe8699a3e"}, {"kind": "Video", "id": "x255ee57a"}, {"kind": "Video", "id": "x275db936"}, {"kind": "Video", "id": "xeb267644"}, {"kind": "Video", "id": "xe9ecdd63"}, {"kind": "Video", "id": "x9d5db2e5"}, {"kind": "Video", "id": "xf925efaa"}, {"kind": "Video", "id": "xb621cf29"}, {"kind": "Video", "id": "xb2a1d125"}, {"kind": "Video", "id": "x12e82317"}, {"kind": "Video", "id": "x876e0e36"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/infrared-and-ultraviolet-visible-spectroscopy-questions/", "id": "infrared-and-ultraviolet-visible-spectroscopy-questions", "title": "Infrared and Ultraviolet/Visible spectroscopy questions", "description": "Infrared and Ultraviolet/Visible spectroscopy questions", "slug": "infrared-and-ultraviolet-visible-spectroscopy-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/introduction-to-infrared-spectroscopy/", "id": "mZ-U7Qpkz8Y", "title": "Introduction to infrared spectroscopy", "kind": "Video", "slug": "introduction-to-infrared-spectroscopy"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/bonds-as-springs/", "id": "ETdNsO7mKXM", "title": "Bonds as springs", "kind": "Video", "slug": "bonds-as-springs"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/signal-characteristics-wave-number/", "id": "MlMwMqM_Wsg", "title": "Signal characteristics - wavenumber", "kind": "Video", "slug": "signal-characteristics-wave-number"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/ir-spectra-for-hydrocarbons/", "id": "_nzaMQKpPLM", "title": "IR spectra for hydrocarbons", "kind": "Video", "slug": "ir-spectra-for-hydrocarbons"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/signal-characteristics-intensity/", "id": "xFNeN9rONKY", "title": "Signal characteristics - intensity", "kind": "Video", "slug": "signal-characteristics-intensity"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/signal-characteristics-shape/", "id": "ALLSsIDhFdU", "title": "Signal characteristics - shape", "kind": "Video", "slug": "signal-characteristics-shape"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/symmetric-and-asymmetric-stretching/", "id": "9GPuoukU8fM", "title": "Symmetric and asymmetric stretching", "kind": "Video", "slug": "symmetric-and-asymmetric-stretching"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/ir-signals-for-carbonyl-compounds/", "id": "VymVIXcyErI", "title": "IR signals for carbonyl compounds", "kind": "Video", "slug": "ir-signals-for-carbonyl-compounds"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/ir-spectra-practice/", "id": "mJt1QI-yDG4", "title": "IR spectra practice", "kind": "Video", "slug": "ir-spectra-practice"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/uv-vis-spectroscopy/", "id": "1FQPXtN7MeI", "title": "UV-Vis spectroscopy", "kind": "Video", "slug": "uv-vis-spectroscopy"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/absorption-in-the-visible-region/", "id": "5HMMfiyszjo", "title": "Absorption in the visible region", "kind": "Video", "slug": "absorption-in-the-visible-region"}, {"path": "khan/test-prep/mcat/physical-processes/infrared-and-ultraviolet-visible-spectroscopy/conjugation-and-color-1/", "id": "zAQz5J3Tpgs", "title": "Conjugation and color", "kind": "Video", "slug": "conjugation-and-color-1"}], "in_knowledge_map": false, "description": "They aren't the same as what you see in CSI:Miami, but molecules do have fingerprints. No two molecules have the same absorption spectra. We can use this fact to determine the composition of a material, its concentration, and measure it\u2019s kinetics. Learn how to use this fantastic tool now!", "node_slug": "Infrared-and-Ultraviolet-Visible-spectroscopy", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/Infrared-and-Ultraviolet-Visible-spectroscopy", "extended_slug": "test-prep/mcat/physical-processes/Infrared-and-Ultraviolet-Visible-spectroscopy", "kind": "Topic", "slug": "infrared-and-ultraviolet-visible-spectroscopy"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/", "id": "proton-nuclear-magnetic-resonance", "hide": false, "title": "Proton nuclear magnetic resonance", "child_data": [{"kind": "Exercise", "id": "xa74968ec"}, {"kind": "Article", "id": "x4dc82c95"}, {"kind": "Video", "id": "xdd5a22f0"}, {"kind": "Video", "id": "x2609584c"}, {"kind": "Video", "id": "x29d65872"}, {"kind": "Video", "id": "x63a51409"}, {"kind": "Video", "id": "xb1fbb528"}, {"kind": "Video", "id": "x5517454d"}, {"kind": "Video", "id": "xceda29a2"}, {"kind": "Video", "id": "x0e327bb2"}, {"kind": "Video", "id": "xb383ffaa"}, {"kind": "Video", "id": "xd6c0a443"}, {"kind": "Video", "id": "x73955b89"}, {"kind": "Video", "id": "x29a93415"}, {"kind": "Video", "id": "x26961ec2"}, {"kind": "Video", "id": "x008fb1a1"}, {"kind": "Video", "id": "x09b6f1e8"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/proton-nuclear-magnetic-resonance-questions/", "id": "proton-nuclear-magnetic-resonance-questions", "title": "Proton nuclear magnetic resonance questions", "description": "Questions pertaining to proton nuclear magnetic resonance", "slug": "proton-nuclear-magnetic-resonance-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/introduction-to-proton-nmr/", "id": "jjcHZuTGWXk", "title": "Introduction to proton NMR", "kind": "Video", "slug": "introduction-to-proton-nmr"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/nuclear-shielding/", "id": "rFmAWQSiqRo", "title": "Nuclear shielding", "kind": "Video", "slug": "nuclear-shielding"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/chemical-equivalence/", "id": "p9B4s0N5yk8", "title": "Chemical equivalence", "kind": "Video", "slug": "chemical-equivalence"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/chemical-shift/", "id": "y_sR3OyZUGo", "title": "Chemical shift", "kind": "Video", "slug": "chemical-shift"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/electronegativity-and-chemical-shift/", "id": "CI84wFXN_Vg", "title": "Electronegativity and chemical shift", "kind": "Video", "slug": "electronegativity-and-chemical-shift"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/diamagnetic-anisotropy/", "id": "ZxNd67TbMLA", "title": "Diamagnetic anisotropy", "kind": "Video", "slug": "diamagnetic-anisotropy"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/integration/", "id": "6dP-mNDnU-A", "title": "Integration", "kind": "Video", "slug": "integration"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/spin-spin-splitting-coupling/", "id": "QlM21sl-TDg", "title": "Spin-spin splitting (coupling)", "kind": "Video", "slug": "spin-spin-splitting-coupling"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/multiplicity-n-1-rule/", "id": "86iNZaZ0S84", "title": "Multiplicity: n + 1 rule", "kind": "Video", "slug": "multiplicity-n-1-rule"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/coupling-constant/", "id": "wZJ_iAxvHGU", "title": "Coupling constant", "kind": "Video", "slug": "coupling-constant"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/complex-splitting/", "id": "intPEdg4Yyc", "title": "Complex splitting", "kind": "Video", "slug": "complex-splitting"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/hydrogen-deficiency-index/", "id": "5bWxTfRZx70", "title": "Hydrogen deficiency index", "kind": "Video", "slug": "hydrogen-deficiency-index"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/proton-nmr-practice-1/", "id": "YrHx2R72hFk", "title": "Proton NMR practice 1", "kind": "Video", "slug": "proton-nmr-practice-1"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/proton-nmr-practice-2/", "id": "gZu9Hhz23EY", "title": "Proton NMR practice 2", "kind": "Video", "slug": "proton-nmr-practice-2"}, {"path": "khan/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance/proton-nmr-practice-3/", "id": "15fz6Wo84IA", "title": "Proton NMR practice 3", "kind": "Video", "slug": "proton-nmr-practice-3"}], "in_knowledge_map": false, "description": "Let\u2019s shift gears and take a peak at 1H-NMR. When you bring a magnet close to iron filings, the filings align with the applied field. The hydrogen atoms of molecules behave similarly under a strong magnetic field, but bounce back and radiate when the field is removed. in this section you will learn how to interpret the spectra created by proton NMR.", "node_slug": "proton-nuclear-magnetic-resonance", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance", "extended_slug": "test-prep/mcat/physical-processes/proton-nuclear-magnetic-resonance", "kind": "Topic", "slug": "proton-nuclear-magnetic-resonance"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/thin-lenses/", "id": "thin-lenses", "hide": false, "title": "Thin lenses", "child_data": [{"kind": "Exercise", "id": "xaaad3fbf"}, {"kind": "Article", "id": "xe8772b1b"}, {"kind": "Video", "id": "8187527"}, {"kind": "Video", "id": "8187528"}, {"kind": "Video", "id": "8187529"}, {"kind": "Video", "id": "8187530"}, {"kind": "Video", "id": "8187531"}, {"kind": "Video", "id": "x39cece9e"}, {"kind": "Video", "id": "x3d81e0e3"}, {"kind": "Video", "id": "xc12d168d"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/thin-lenses/thin-lenses-questions/", "id": "thin-lenses-questions", "title": "Thin lenses questions", "description": "Thin lenses questions", "slug": "thin-lenses-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/thin-lenses/convex-lenses/", "id": "K0sjZ5nqQ7g", "title": "Convex lenses", "kind": "Video", "description": "Convex Lenses", "slug": "convex-lenses"}, {"path": "khan/test-prep/mcat/physical-processes/thin-lenses/convex-lens-examples/", "id": "xxF_mdoZom0", "title": "Convex lens examples", "kind": "Video", "description": "Convex Lens Examples", "slug": "convex-lens-examples"}, {"path": "khan/test-prep/mcat/physical-processes/thin-lenses/concave-lenses/", "id": "Vh70PyitQzo", "title": "Concave lenses", "kind": "Video", "description": "Concave Lenses", "slug": "concave-lenses"}, {"path": "khan/test-prep/mcat/physical-processes/thin-lenses/object-image-and-focal-distance-relationship-proof-of-formula/", "id": "rse0I7rZ8jM", "title": "Object image and focal distance relationship (proof of formula)", "kind": "Video", "description": "Object Image and Focal Distance Relationship (Proof of Formula)", "slug": "object-image-and-focal-distance-relationship-proof-of-formula"}, {"path": "khan/test-prep/mcat/physical-processes/thin-lenses/object-image-height-and-distance-relationship/", "id": "acQYX4nwhCk", "title": "Object image height and distance relationship", "kind": "Video", "description": "Object Image Height and Distance Relationship", "slug": "object-image-height-and-distance-relationship"}, {"path": "khan/test-prep/mcat/physical-processes/thin-lenses/thin-lens-equation-and-problem-solving/", "id": "7GV1UZSTNJg", "title": "Thin lens equation and problem solving", "kind": "Video", "slug": "thin-lens-equation-and-problem-solving"}, {"path": "khan/test-prep/mcat/physical-processes/thin-lenses/multiple-lens-systems/", "id": "GPomGcZ3_kk", "title": "Multiple lens systems", "kind": "Video", "slug": "multiple-lens-systems"}, {"path": "khan/test-prep/mcat/physical-processes/thin-lenses/diopters-aberration-and-the-human-eye/", "id": "eji8zKa7H7s", "title": "Diopters, Aberration, and the Human Eye", "kind": "Video", "slug": "diopters-aberration-and-the-human-eye"}], "in_knowledge_map": false, "description": "4D: Without lenses, we would not be able to examine the layers of the skin or to observe the habits of the pink flamingo from a distance. If you have ever used a microscope, binoculars, or a magnifying glass, you have benefited from the workings of a thin lens, which refracts rays of light as it passes through the medium. In these tutorials, you\u2019ll learn how to use ray tracings and the thin lens formula to predict the sizes and orientation of images created by thin lenses. We will apply these concepts to a discussion of the human eye.", "node_slug": "thin-lenses", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/thin-lenses", "extended_slug": "test-prep/mcat/physical-processes/thin-lenses", "kind": "Topic", "slug": "thin-lenses"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/spherical-mirrors/", "id": "spherical-mirrors", "hide": false, "title": "Spherical mirrors", "child_data": [{"kind": "Exercise", "id": "x5c9918a4"}, {"kind": "Video", "id": "8187523"}, {"kind": "Video", "id": "8187524"}, {"kind": "Video", "id": "8187525"}, {"kind": "Video", "id": "8187526"}, {"kind": "Article", "id": "x57276fb1"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/spherical-mirrors/spherical-mirrors-questions/", "id": "spherical-mirrors-questions", "title": "Spherical mirrors questions", "description": "Questions pertaining to spherical mirrors", "slug": "spherical-mirrors-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/spherical-mirrors/virtual-image/", "id": "nrOg85VPQgw", "title": "Virtual image", "kind": "Video", "description": "Virtual Image", "slug": "virtual-image"}, {"path": "khan/test-prep/mcat/physical-processes/spherical-mirrors/parabolic-mirrors-and-real-images/", "id": "8X1AS9qD5AQ", "title": "Parabolic mirrors and real images", "kind": "Video", "description": "Parabolic Mirrors and Real Images", "slug": "parabolic-mirrors-and-real-images"}, {"path": "khan/test-prep/mcat/physical-processes/spherical-mirrors/parabolic-mirrors-2/", "id": "7m0u6dxA5Xo", "title": "Parabolic mirrors 2", "kind": "Video", "description": "Parabolic Mirrors 2", "slug": "parabolic-mirrors-2"}, {"path": "khan/test-prep/mcat/physical-processes/spherical-mirrors/convex-parabolic-mirrors/", "id": "dWY25vb1ZB0", "title": "Convex parabolic mirrors", "kind": "Video", "description": "Convex Parabolic Mirrors", "slug": "convex-parabolic-mirrors"}], "in_knowledge_map": false, "description": "4D: Have you ever been to a house of mirrors at a carnival, or maybe seen one in the movies? Curved mirrors are fun, and so is a description of their physics. It\u2019s actually possible to roughly predict what an image produced by a mirror will look like using just pen and paper. You will discover the difference between real and virtual images as we draw ray tracing diagrams to show how images are formed by spherical mirrors.", "node_slug": "spherical-mirrors", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/spherical-mirrors", "extended_slug": "test-prep/mcat/physical-processes/spherical-mirrors", "kind": "Topic", "slug": "spherical-mirrors"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/", "id": "reflection-and-refraction", "hide": false, "title": "Reflection and refraction", "child_data": [{"kind": "Exercise", "id": "x8262cf06"}, {"kind": "Article", "id": "x862cd447"}, {"kind": "Video", "id": "8187516"}, {"kind": "Video", "id": "8187517"}, {"kind": "Video", "id": "8187518"}, {"kind": "Video", "id": "8187519"}, {"kind": "Video", "id": "xb93e38c8"}, {"kind": "Video", "id": "xbf437128"}, {"kind": "Video", "id": "x0648071f"}, {"kind": "Video", "id": "x8919196d"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/reflection-and-refraction/", "id": "reflection-and-refraction", "title": "Reflection and refraction questions", "description": "Questions pertaining to reflection and refraction", "slug": "reflection-and-refraction", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/specular-and-diffuse-reflection/", "id": "sd0BOnN6aNY", "title": "Specular and diffuse reflection", "kind": "Video", "description": "Specular and Diffuse Reflection", "slug": "specular-and-diffuse-reflection"}, {"path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/specular-and-diffuse-reflection-2/", "id": "XR52dXLyz-M", "title": "Specular and diffuse reflection 2", "kind": "Video", "description": "Specular and Diffuse Reflection 2", "slug": "specular-and-diffuse-reflection-2"}, {"path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/refraction-and-snell-s-law/", "id": "y55tzg_jW9I", "title": "Refraction and Snell's law", "kind": "Video", "description": "Refraction and Snell's Law", "slug": "refraction-and-snell-s-law"}, {"path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/refraction-in-water/", "id": "jxptCXHLxKQ", "title": "Refraction in water", "kind": "Video", "description": "Refraction in Water", "slug": "refraction-in-water"}, {"path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/snells-law-example-1-edited/", "id": "5MUAgzSUHRc", "title": "Snell's law example 1", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "snells-law-example-1-edited"}, {"path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/snells-law-example-2-edited/", "id": "2eTsa6Jx424", "title": "Snell's law example 2", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "snells-law-example-2-edited"}, {"path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/total-internal-reflection-edited/", "id": "ZDbM6uugJkk", "title": "Total internal reflection", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "total-internal-reflection-edited"}, {"path": "khan/test-prep/mcat/physical-processes/reflection-and-refraction/dispersion/", "id": "HRuLhY0NAMI", "title": "Dispersion", "kind": "Video", "slug": "dispersion"}], "in_knowledge_map": false, "description": "4D: Reflection and refraction of light rays allow us to take in the visual world around us. Perhaps you have seen surgeons outfitted with magnifying glasses in order for them to grasp the tiniest vessels of the body. And if you\u2019ve ever looked in a mirror to comb your hair in the morning, you\u2019ve benefited from the power of a reflective mirror. You may have also noticed that things look different when seen underwater. We will explore how light rays bend as they penetrate surfaces like water or reflect as they meet surfaces like that of a mirror.", "node_slug": "reflection-and-refraction", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/reflection-and-refraction", "extended_slug": "test-prep/mcat/physical-processes/reflection-and-refraction", "kind": "Topic", "slug": "reflection-and-refraction"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/", "id": "atomic-nucleus", "hide": false, "title": "Atomic nucleus", "child_data": [{"kind": "Exercise", "id": "x61e0e43c"}, {"kind": "Article", "id": "xe3ace0b4"}, {"kind": "Article", "id": "xf74d3db2"}, {"kind": "Video", "id": "x3e2d8899"}, {"kind": "Video", "id": "xc61e9668"}, {"kind": "Video", "id": "x579546a7"}, {"kind": "Video", "id": "x9722cb54"}, {"kind": "Video", "id": "x8f704f5f"}, {"kind": "Video", "id": "406026"}, {"kind": "Video", "id": "423007"}, {"kind": "Video", "id": "xb514d30c"}, {"kind": "Video", "id": "375067"}, {"kind": "Video", "id": "xa31de9c8"}, {"kind": "Video", "id": "x9cb7fbc5"}, {"kind": "Video", "id": "x4d868c24"}, {"kind": "Video", "id": "x89aa63ad"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/atomic-nucleus-questions/", "id": "atomic-nucleus-questions", "title": "Atomic nucleus questions", "description": "Questions pertaining to atomic nucleus", "slug": "atomic-nucleus-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/atomic-number-mass-number-and-isotopes/", "id": "I-Or4bUAIfo", "title": "Atomic number, mass number, and isotopes", "kind": "Video", "description": "How to use the atomic number and the mass number to represent different isotopes", "slug": "atomic-number-mass-number-and-isotopes"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/atomic-mass-2/", "id": "b0sYucYw6F0", "title": "Atomic mass", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "atomic-mass-2"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/mass-defect-and-binding-energy-edited/", "id": "vYKhS35m5Fs", "title": "Mass defect and binding energy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "mass-defect-and-binding-energy-edited"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/nuclear-stability-and-nuclear-equasions/", "id": "gqrh8wbPXVE", "title": "Nuclear stability and nuclear equations", "kind": "Video", "description": "Using the ratio of neutrons to protons to figure out of a nucleus will be stable or radioactive.", "slug": "nuclear-stability-and-nuclear-equasions"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/alpha-beta-and-gamma-decay/", "id": "mzLOT6uOfO4", "title": "Writing nuclear equations for alpha, beta, and gamma decay", "kind": "Video", "description": "Writing nuclear equations for alpha, beta, and gamma decay.", "slug": "alpha-beta-and-gamma-decay"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/types-of-decay/", "id": "3koOwozY4oc", "title": "Types of decay", "kind": "Video", "description": "Alpha, Beta, Gamma Decay and Positron Emission", "slug": "types-of-decay"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/half-life/", "id": "9REPnibO4IQ", "title": "Half-life and carbon dating", "kind": "Video", "description": "Carbon dating is a real-life example of a first-order reaction. This video explains\u00a0half-life in the context of radioactive decay.", "slug": "half-life"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/half-life-of-radioactive-isotopes/", "id": "dnYyMHSSb8M", "title": "Half-life plot", "kind": "Video", "description": "Definition of half-life and graphing the decay of phosphorus-32. Calculating how much phosphorus-32 remains after 57.2 days.", "slug": "half-life-of-radioactive-isotopes"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/exponential-decay-formula-proof-can-skip-involves-calculus/", "id": "H7nrVDV8ahc", "title": "Exponential decay formula proof (can skip, involves calculus)", "kind": "Video", "description": "Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class.", "slug": "exponential-decay-formula-proof-can-skip-involves-calculus"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/introduction-to-exponential-decay-edited/", "id": "bnGjN-Xsg9U", "title": "Introduction to exponential decay", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "introduction-to-exponential-decay-edited"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/exponential-decay-and-semi-log-plots/", "id": "vnNlvnnBX0I", "title": "Exponential decay and semi-log plots", "kind": "Video", "description": "Using exponential decay equation to solve for relationship between k and half-life. Using semi-log plot to get graph of a straight line with slope of -k.", "slug": "exponential-decay-and-semi-log-plots"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/exponential-decay-examples-edited/", "id": "LaEokkaZkrw", "title": "More exponential decay examples", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "exponential-decay-examples-edited"}, {"path": "khan/test-prep/mcat/physical-processes/atomic-nucleus/mass-spectrometer/", "id": "-YfemQNTkvA", "title": "Mass spectrometer", "kind": "Video", "slug": "mass-spectrometer"}], "in_knowledge_map": false, "description": "4E: An introduction to the nucleus including isotopes, mass defects, and radioactive decay.", "node_slug": "atomic-nucleus", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/atomic-nucleus", "extended_slug": "test-prep/mcat/physical-processes/atomic-nucleus", "kind": "Topic", "slug": "atomic-nucleus"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/electronic-structure/", "id": "electronic-structure", "hide": false, "title": "Electronic structure", "child_data": [{"kind": "Exercise", "id": "x8a1bc727"}, {"kind": "Video", "id": "xc8910b5d"}, {"kind": "Video", "id": "xf312fc13"}, {"kind": "Video", "id": "x209bd4dc"}, {"kind": "Video", "id": "xdb4337d3"}, {"kind": "Video", "id": "xb74206bb"}, {"kind": "Video", "id": "xd763131b"}, {"kind": "Video", "id": "x49860a08"}, {"kind": "Video", "id": "xa32ce8f9"}, {"kind": "Video", "id": "x7448f8b7"}, {"kind": "Video", "id": "xfe7eabb6"}, {"kind": "Video", "id": "xf39357d2"}, {"kind": "Video", "id": "x50988bfb"}, {"kind": "Video", "id": "xf22e57ff"}, {"kind": "Video", "id": "x4d6604e9"}, {"kind": "Video", "id": "xb73055ce"}, {"kind": "Article", "id": "xfacb9ffa"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/electronic-structure/electronic-structure-quiz/", "id": "electronic-structure-quiz", "title": "Electronic structure questions", "description": "Electronic structure quiz", "slug": "electronic-structure-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/photoelectric-effect/", "id": "vuGpUFjLaYE", "title": "Photoelectric effect", "kind": "Video", "slug": "photoelectric-effect"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/bohr-model-radii-derivation-using-physics/", "id": "Qcd0IhW_85I", "title": "Bohr model radii (derivation using physics)", "kind": "Video", "slug": "bohr-model-radii-derivation-using-physics"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/bohr-model-radii/", "id": "Hbuh5m3p0x0", "title": "Bohr model radii", "kind": "Video", "slug": "bohr-model-radii"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/bohr-model-energy-levels-derivation-using-physics/", "id": "7Zin8hG9Nhw", "title": "Bohr model energy levels (derivation using physics)", "kind": "Video", "slug": "bohr-model-energy-levels-derivation-using-physics"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/bohr-model-energy-levels/", "id": "nJ-PtF14EFw", "title": "Bohr model energy levels", "kind": "Video", "slug": "bohr-model-energy-levels"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/absorption-and-emission/", "id": "AznXSVx2xX0", "title": "Absorption and emission", "kind": "Video", "slug": "absorption-and-emission"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/emission-spectrum-of-hydrogen-edited/", "id": "12yg1R0RtSk", "title": "Emission spectrum of hydrogen", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "emission-spectrum-of-hydrogen-edited"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/heisenberg-uncertainty-principle-edited/", "id": "fpLNz9ZsdO8", "title": "Heisenberg uncertainty principle", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "heisenberg-uncertainty-principle-edited"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/quantum-numbers/", "id": "KrXE_SzRoqw", "title": "Quantum numbers", "kind": "Video", "slug": "quantum-numbers"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/quantum-numbers-for-the-first-four-shells/", "id": "qLU0X154wlE", "title": "Quantum numbers for the first four shells", "kind": "Video", "slug": "quantum-numbers-for-the-first-four-shells"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/electron-configurations-for-the-first-period/", "id": "0MKsFD03Ukc", "title": "Electron configurations for the first period", "kind": "Video", "slug": "electron-configurations-for-the-first-period"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/electron-configurations-for-the-second-period/", "id": "UEPs-GA2s40", "title": "Electron configurations for the second period", "kind": "Video", "slug": "electron-configurations-for-the-second-period"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/electron-configurations-for-the-third-and-fourth-periods/", "id": "3tyrkxruz88", "title": "Electron configurations for the third and fourth periods", "kind": "Video", "slug": "electron-configurations-for-the-third-and-fourth-periods"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/electron-configurations-in-the-3d-orbitals/", "id": "ddNsfv8iaps", "title": "Electron configurations in the 3d orbitals", "kind": "Video", "slug": "electron-configurations-in-the-3d-orbitals"}, {"path": "khan/test-prep/mcat/physical-processes/electronic-structure/paramagnetism-and-diamagnetism/", "id": "-lIc5z3XjXQ", "title": "Paramagnetism and diamagnetism", "kind": "Video", "slug": "paramagnetism-and-diamagnetism"}], "in_knowledge_map": false, "description": "1s, 2s, red s, blue s. Electrons spin around a the nucleus of an atom in various spherical and teardrop shaped orbitals. The following section will show how the periodic table is built around these orbitals, and how the electronic structure of atoms dictates how they interact with light and other atoms.", "node_slug": "electronic-structure", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/electronic-structure", "extended_slug": "test-prep/mcat/physical-processes/electronic-structure", "kind": "Topic", "slug": "electronic-structure"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/", "id": "periodic-table-of-elements", "hide": false, "title": "Periodic table", "child_data": [{"kind": "Exercise", "id": "x40d44fe8"}, {"kind": "Video", "id": "x57ecb61f"}, {"kind": "Video", "id": "xf064b16d"}, {"kind": "Video", "id": "x545922ca"}, {"kind": "Video", "id": "xf654ebd5"}, {"kind": "Video", "id": "xdfc0221e"}, {"kind": "Video", "id": "xe2b4547d"}, {"kind": "Video", "id": "xdb3555d5"}, {"kind": "Video", "id": "x4562bba6"}, {"kind": "Video", "id": "xb9779c70"}, {"kind": "Video", "id": "x109b2662"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/periodic-table-questions/", "id": "periodic-table-questions", "title": "Periodic table questions", "description": "Questions pertaining to Periodic Table", "slug": "periodic-table-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/electronegativity-and-chemical-bonds/", "id": "126N4hox9YA", "title": "Electronegativity and bonding", "kind": "Video", "description": "Electronegativity differences in bonding using Pauling scale. Using differences in electronegativity to classify bonds as covalent, polar covalent, or ionic.", "slug": "electronegativity-and-chemical-bonds"}, {"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/periodic-table-introduction/", "id": "t_f8bB1kf6M", "title": "The periodic table - classification of elements", "kind": "Video", "description": "Common terms describing the ways elements are classified in the periodic table.", "slug": "periodic-table-introduction"}, {"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/periodic-table-transition-metals/", "id": "kCM2mSb4qIU", "title": "The periodic table - transition metals", "kind": "Video", "description": "The definition of a transition metal, and how to write the electron configuration including examples for Fe and Zn.", "slug": "periodic-table-transition-metals"}, {"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/periodic-table-valence-electrons/", "id": "akm5H2JsccI", "title": "The periodic table - valence electrons for main group", "kind": "Video", "description": "How to determine the number of valence electrons and draw Lewis structures for main group elements starting from the electron configuration.", "slug": "periodic-table-valence-electrons"}, {"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/atomic-and-ionic-radii/", "id": "rKoIcgBM4Vg", "title": "Atomic and ionic radii", "kind": "Video", "description": "Explaining group and period trends in atomic and ionic radii.", "slug": "atomic-and-ionic-radii"}, {"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/group-trend-for-ionization-energy/", "id": "vQLcxlvK7Ik", "title": "Group trend for ionization energy", "kind": "Video", "description": "Explaining trend in ionization energy down a group using concepts of nuclear charge, electron shielding, and distance of electrons from nucleus", "slug": "group-trend-for-ionization-energy"}, {"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/period-trend-for-ionization-energy/", "id": "DMDcn2j-8ig", "title": "Period trend for ionization energy", "kind": "Video", "description": "Explaining trends in ionization energy across a period using nuclear charge, shielding, and distance of electrons from nucleus", "slug": "period-trend-for-ionization-energy"}, {"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/first-and-second-ionization-energy/", "id": "uVWquWFjnCw", "title": "First and second ionization energy", "kind": "Video", "description": "Comparing first and second ionization energy of Li using nuclear charge, shielding, and distance of electrons from nucleus", "slug": "first-and-second-ionization-energy"}, {"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/electron-affinity/", "id": "j0xQmCPXTvY", "title": "Electron affinity", "kind": "Video", "description": "Definition of electron affinity, and comparing electron affinities of LI, Be, and B", "slug": "electron-affinity"}, {"path": "khan/test-prep/mcat/physical-processes/periodic-table-of-elements/period-trend-for-electron-affinity/", "id": "M7eAyjGZd-4", "title": "Period trend for electron affinity", "kind": "Video", "description": "Explaining general trends in electron affinity across the second period, including the exceptions N and Ne", "slug": "period-trend-for-electron-affinity"}], "in_knowledge_map": false, "description": "4E: A little more than a century ago, the chemist Dmitri Mendeleev published an early form of the periodic table, which organizes the known elements of our world by ionization energy and electron affinity. His method of classifying the elements was so useful that we still use it even today. We will learn to apply this elegant table to an understanding of atoms and molecules in this tutorial. Hydrogen, helium, lithium, beryllium, boron, carbon\u2026", "node_slug": "periodic-table-of-elements", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/periodic-table-of-elements", "extended_slug": "test-prep/mcat/physical-processes/periodic-table-of-elements", "kind": "Topic", "slug": "periodic-table-of-elements"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/stoichiometry/", "id": "stoichiometry", "hide": false, "title": "Stoichiometry", "child_data": [{"kind": "Exercise", "id": "x017ef2cd"}, {"kind": "Article", "id": "xed749899"}, {"kind": "Video", "id": "xd74ceedc"}, {"kind": "Video", "id": "x8f07ed9b"}, {"kind": "Video", "id": "364061"}, {"kind": "Video", "id": "x6af16e5d"}, {"kind": "Video", "id": "xbe363523"}, {"kind": "Video", "id": "389052"}, {"kind": "Video", "id": "x797d3317"}, {"kind": "Video", "id": "xcdac65f7"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/stoichiometry/stoichiometry-questions/", "id": "stoichiometry-questions", "title": "Stoichiometry questions", "description": "Questions pertaining to stoichiometry", "slug": "stoichiometry-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/stoichiometry/empirical-formula-from-mass-composition-edited/", "id": "Ph8_diBYnGM", "title": "Empirical formula from mass composition edited", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "empirical-formula-from-mass-composition-edited"}, {"path": "khan/test-prep/mcat/physical-processes/stoichiometry/molecular-and-empirical-formulas-edited/", "id": "Q1u51peRHmA", "title": "Molecular and empirical formulas", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "molecular-and-empirical-formulas-edited"}, {"path": "khan/test-prep/mcat/physical-processes/stoichiometry/the-mole-and-avogadro-s-number/", "id": "AsqEkF7hcII", "title": "The mole and Avogadro's number", "kind": "Video", "description": "Introduction to the idea of a mole as a number (vs. an animal).", "slug": "the-mole-and-avogadro-s-number"}, {"path": "khan/test-prep/mcat/physical-processes/stoichiometry/stoichiometry-example-problem-1-edited/", "id": "KodGZFPc474", "title": "Stoichiometry example problem 1", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "stoichiometry-example-problem-1-edited"}, {"path": "khan/test-prep/mcat/physical-processes/stoichiometry/stoichiometry-edited/", "id": "Bl6jlgZ8aaM", "title": "Stoichiometry", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "stoichiometry-edited"}, {"path": "khan/test-prep/mcat/physical-processes/stoichiometry/stoichiometry-limiting-reagent/", "id": "rESzyhPOJ7I", "title": "Stoichiometry: Limiting reagent", "kind": "Video", "description": "Stoichiometry problem where we have a limiting reagent!", "slug": "stoichiometry-limiting-reagent"}, {"path": "khan/test-prep/mcat/physical-processes/stoichiometry/limiting-reactant-example-problem-1-edited/", "id": "EqH9R6Otn7I", "title": "Limiting reactant example problem 1 edited", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "limiting-reactant-example-problem-1-edited"}, {"path": "khan/test-prep/mcat/physical-processes/stoichiometry/specific-gravity/", "id": "nVPrWz8Jfgo", "title": "Specific gravity", "kind": "Video", "description": "In this video David explains what specific gravity means. He also shows how to calculate the value for specific gravity and use it to determine the percent of an object that will be submerged while floating.", "slug": "specific-gravity"}], "in_knowledge_map": false, "description": "4E: A cake recipe calls for 2 eggs and 4 cups of flour, but you have 3 eggs, and 3 cups of flour. In this example, flour is our limiting reagent, that is, its small amount preventing you from completing the reaction of making the cake since we do not have enough (while we have more than enough eggs to make the cake). We\u2019ll extend this simple example to chemical reactions with atoms and molecules. You'll learn to balance chemical reactions, a concept that will be applied to several other problems in chemistry.", "node_slug": "stoichiometry", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/stoichiometry", "extended_slug": "test-prep/mcat/physical-processes/stoichiometry", "kind": "Topic", "slug": "stoichiometry"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/copy-of-balancing-chemical-equations/", "id": "copy-of-balancing-chemical-equations", "hide": false, "title": "Balancing chemical equations", "child_data": [{"kind": "Exercise", "id": "1280176961"}, {"kind": "Exercise", "id": "x44d4efbe"}, {"kind": "Video", "id": "xc8ecefc8"}, {"kind": "Video", "id": "x068874ad"}, {"kind": "Video", "id": "x58fe4869"}, {"kind": "Video", "id": "xf98cead0"}, {"kind": "Video", "id": "xf8a51a8a"}, {"kind": "Scratchpad", "id": "1406253871"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/copy-of-balancing-chemical-equations/balancing_chemical_equations/", "id": "balancing_chemical_equations", "title": "Balancing chemical equations 1", "description": "Practice balancing chemical equations", "slug": "balancing_chemical_equations", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/copy-of-balancing-chemical-equations/balancing-chemical-equations-questions/", "id": "balancing-chemical-equations-questions", "title": "Balancing chemical equations 2", "description": "Balancing chemical equations questions", "slug": "balancing-chemical-equations-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/copy-of-balancing-chemical-equations/balancing-chemical-equations-introduction/", "id": "TUuABq95BBM", "title": "Balancing chemical equations", "kind": "Video", "description": "How to balance a chemical reaction by making sure you have the same number of atoms of each element on both sides.", "slug": "balancing-chemical-equations-introduction"}, {"path": "khan/test-prep/mcat/physical-processes/copy-of-balancing-chemical-equations/balancing-more-complex-chemical-equation/", "id": "xqpYeiefZl8", "title": "Balancing more complex chemical equations", "kind": "Video", "description": "Example of balancing the combustion reaction of ethylene. Some tips on how to balance more complicated reactions.", "slug": "balancing-more-complex-chemical-equation"}, {"path": "khan/test-prep/mcat/physical-processes/copy-of-balancing-chemical-equations/visually-understanding-balancing-chemical-equations/", "id": "HbIdp5DURJA", "title": "Visually understanding balancing chemical equations", "kind": "Video", "description": "Relating the balanced chemical equation to the structural formulas of the reactants and product.s.", "slug": "visually-understanding-balancing-chemical-equations"}, {"path": "khan/test-prep/mcat/physical-processes/copy-of-balancing-chemical-equations/balancing-another-combustion-reaction/", "id": "cmi8EnJQA84", "title": "Balancing another combustion reaction", "kind": "Video", "description": "Balancing the combustion reaction of ethane.", "slug": "balancing-another-combustion-reaction"}, {"path": "khan/test-prep/mcat/physical-processes/copy-of-balancing-chemical-equations/balancing-chemical-equation-with-substitution/", "id": "8KXWJCmshEE", "title": "Balancing chemical equation with substitution", "kind": "Video", "description": "Using the substitution method to balance a reaction where a reactant and product have a polyatomic ion in common.", "slug": "balancing-chemical-equation-with-substitution"}], "in_knowledge_map": false, "description": "We are now going to look at chemical reactions. But as we do, we need to make sure that atoms aren't magically appearing or disappearing. Put another way, we need to sure that we have the same number of each constituent atom in the product of the reaction as we do in the reactants (the molecules that react)!", "node_slug": "copy-of-balancing-chemical-equations", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/copy-of-balancing-chemical-equations", "extended_slug": "test-prep/mcat/physical-processes/copy-of-balancing-chemical-equations", "kind": "Topic", "slug": "copy-of-balancing-chemical-equations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/physical-processes/redox-reactions/", "id": "redox-reactions", "hide": false, "title": "Redox reactions", "child_data": [{"kind": "Exercise", "id": "x62e72c09"}, {"kind": "Video", "id": "xce6506c6"}, {"kind": "Video", "id": "x528f68ef"}, {"kind": "Video", "id": "x7e2a500f"}, {"kind": "Video", "id": "x1cd3b06b"}], "children": [{"path": "khan/test-prep/mcat/physical-processes/redox-reactions/redox-reactions-questions/", "id": "redox-reactions-questions", "title": "Redox reactions questions", "description": "Questions pertaining to redox reactions", "slug": "redox-reactions-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/physical-processes/redox-reactions/oxidizing-and-reducing-agents-1/", "id": "TOdHMORp4is", "title": "Oxidizing and reducing agents", "kind": "Video", "description": "How to identify the oxidizing and reducing agents.", "slug": "oxidizing-and-reducing-agents-1"}, {"path": "khan/test-prep/mcat/physical-processes/redox-reactions/disproportionation/", "id": "PXlvKtpvUEk", "title": "Disproportionation", "kind": "Video", "description": "Assigning oxidation states for the decomposition of hydrogen peroxide, a disproportionation reaction.", "slug": "disproportionation"}, {"path": "khan/test-prep/mcat/physical-processes/redox-reactions/balance-and-redox-reactions1/", "id": "4tLrbMstfm8", "title": "Balancing redox reactions in acid", "kind": "Video", "description": "How to balance a redox reaction in acid.", "slug": "balance-and-redox-reactions1"}, {"path": "khan/test-prep/mcat/physical-processes/redox-reactions/balancing-redox-reactions1/", "id": "Vjs8uK2ovQE", "title": "Balancing redox reactions in base", "kind": "Video", "description": "How to balance a redox reaction in base.", "slug": "balancing-redox-reactions1"}], "in_knowledge_map": false, "description": "4E: You\u2019re the resident on call in the wards of the hospital and have been receiving calls all day long. When you finally plug in your phone for charging, a redox reaction takes place to refuel its battery. At one terminal of the battery, a reaction is producing free electrons, while the other end absorbs these electrons. We will delve into the mechanics of this elegant process - part of the reason we are able to live in an increasingly wireless world - in this tutorial.", "node_slug": "redox-reactions", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/physical-processes/redox-reactions", "extended_slug": "test-prep/mcat/physical-processes/redox-reactions", "kind": "Topic", "slug": "redox-reactions"}], "in_knowledge_map": false, "description": "Foundational Concept 4: Complex living organisms transport materials, sense their environment, process signals, and respond to changes using processes that can be understood in terms of physical principles.", "node_slug": "physical-processes", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/physical-processes", "extended_slug": "test-prep/mcat/physical-processes", "kind": "Topic", "slug": "physical-processes"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/", "id": "chemical-processes", "hide": false, "title": "Chemical processes", "child_data": [{"kind": "Topic", "id": "x26df79bc"}, {"kind": "Topic", "id": "x486a923c"}, {"kind": "Topic", "id": "x784a33e2"}, {"kind": "Topic", "id": "x268aef38"}, {"kind": "Topic", "id": "xaa41a151"}, {"kind": "Topic", "id": "x76b0c72a"}, {"kind": "Topic", "id": "x8bda57c7"}, {"kind": "Topic", "id": "xaf13de49"}, {"kind": "Topic", "id": "x67ac445e"}, {"kind": "Topic", "id": "x0dec96ad"}, {"kind": "Topic", "id": "xc8b20ed4"}, {"kind": "Topic", "id": "x465cac1e"}, {"kind": "Topic", "id": "x5e550e62"}, {"kind": "Topic", "id": "xdad74afa"}, {"kind": "Topic", "id": "x1d2fe656"}, {"kind": "Topic", "id": "xabccc6f5"}, {"kind": "Topic", "id": "xf84fd1de"}, {"kind": "Topic", "id": "x19c7575f"}, {"kind": "Topic", "id": "x75ab5d31"}, {"kind": "Topic", "id": "xae604e90"}, {"kind": "Topic", "id": "x5f6527ed"}, {"kind": "Topic", "id": "xb5b88621"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/", "id": "acid-base-equilibria", "hide": false, "title": "Acid/base equilibria", "child_data": [{"kind": "Exercise", "id": "x0f8eae85"}, {"kind": "Video", "id": "xd0514fbc"}, {"kind": "Article", "id": "xac92b496"}, {"kind": "Video", "id": "x4c27d237"}, {"kind": "Video", "id": "xaaa92ed9"}, {"kind": "Video", "id": "x3cdd507c"}, {"kind": "Video", "id": "x52405acc"}, {"kind": "Video", "id": "xe962fbd5"}, {"kind": "Video", "id": "x1676f258"}, {"kind": "Video", "id": "xe0b51228"}, {"kind": "Video", "id": "xcb0e59e6"}, {"kind": "Video", "id": "x3029a604"}, {"kind": "Video", "id": "x177cf25c"}, {"kind": "Video", "id": "x2d80621f"}, {"kind": "Video", "id": "x81deb5b6"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/acid-base-questions/", "id": "acid-base-questions", "title": "Acid/base questions", "description": "Acid/base questions", "slug": "acid-base-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/acid-base-definitions-1/", "id": "ss7Ap-6bFYw", "title": "Acid-base definitions", "kind": "Video", "slug": "acid-base-definitions-1"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/ka-and-acid-strength/", "id": "BeHOvYchtBg", "title": "Ka and acid strength", "kind": "Video", "description": "How to write an equilibrium expression for an acid-base reaction and how to evaluate the strength of an acid using Ka", "slug": "ka-and-acid-strength"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/autoionization-of-water/", "id": "Xwf3ZsGYzCU", "title": "Autoionization of water", "kind": "Video", "slug": "autoionization-of-water"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/definition-of-ph/", "id": "gJfOlBMfYkg", "title": "Definition of pH", "kind": "Video", "slug": "definition-of-ph"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/strong-acids-and-strong-bases/", "id": "gsu4gjrFApA", "title": "Strong acids and strong bases", "kind": "Video", "slug": "strong-acids-and-strong-bases"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/weak-acid-equilibrium/", "id": "icNOBmKjDLo", "title": "Weak acid equilibrium", "kind": "Video", "description": "Quick overview of Ka and pKa. Example of calculating the pH of a weak acid solution.", "slug": "weak-acid-equilibrium"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/weak-base-equilibrium/", "id": "xGE3sEz6U9Y", "title": "Weak base equilibrium", "kind": "Video", "description": "Quick overview of Kb and pKb. Examples of calculating the pH of a weak base solution.", "slug": "weak-base-equilibrium"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/relationship-between-ka-and-kb/", "id": "DGMs81-Rp1o", "title": "Relationship between Ka and Kb", "kind": "Video", "description": "The relationship between Ka and Kb, and pKa and pKb. Examples of finding Ka of a weak acid given Kb of the conjugate base.", "slug": "relationship-between-ka-and-kb"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/acid-base-properties-of-salts/", "id": "HwkEQfsJenk", "title": "Acid-base properties of salts", "kind": "Video", "description": "Examples of different kinds of neutralization reactions, and analyzing the pH of the resulting salt solution.", "slug": "acid-base-properties-of-salts"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/ph-of-salt-solutions/", "id": "XZWoMXVANww", "title": "pH of salt solutions", "kind": "Video", "description": "Examples of calculating pH of 0.25 M solution of sodium acetate, and calculating the pH of 0.050 M solution of ammonium chloride.", "slug": "ph-of-salt-solutions"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/common-ion-effect/", "id": "223KLPnJCBI", "title": "Common ion effect and buffers", "kind": "Video", "description": "Example of calculating the pH of solution that is 1.00 M acetic acid and 1.00 M sodium acetate using ICE table. Another example of calculating pH of a solution that is 0.15 M ammonia and 0.35 M ammonium nitrate.", "slug": "common-ion-effect"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/buffer-solutions/", "id": "oIlMsYOKEsc", "title": "Buffer solutions", "kind": "Video", "slug": "buffer-solutions"}, {"path": "khan/test-prep/mcat/chemical-processes/acid-base-equilibria/buffer-solution-calculations/", "id": "lsHq5aqz4uQ", "title": "Buffer solution pH calculations", "kind": "Video", "description": "Example of calculating the pH of a buffer solution using the Henderson-Hasselbalch equation, including the pH of the buffer solution after adding some NaOH.", "slug": "buffer-solution-calculations"}], "in_knowledge_map": false, "description": "Chill out! Characterizing solutions of acids and bases is easy when you use the simple ICE table technique. You will also learn how buffers regulate pH so well, a process essential to homeostasis.", "node_slug": "acid-base-equilibria", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/acid-base-equilibria", "extended_slug": "test-prep/mcat/chemical-processes/acid-base-equilibria", "kind": "Topic", "slug": "acid-base-equilibria"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/", "id": "titrations-and-solubility-equilibria", "hide": false, "title": "Titrations", "child_data": [{"kind": "Exercise", "id": "xc7c7cea2"}, {"kind": "Video", "id": "xf41044f4"}, {"kind": "Video", "id": "xc827ff46"}, {"kind": "Video", "id": "x884a1838"}, {"kind": "Video", "id": "x0f5bb35f"}, {"kind": "Video", "id": "xe3933619"}, {"kind": "Video", "id": "xcf6e8167"}, {"kind": "Video", "id": "xa23021eb"}, {"kind": "Video", "id": "xf9342364"}, {"kind": "Article", "id": "x3839d643"}, {"kind": "Video", "id": "x394a1fa6"}, {"kind": "Video", "id": "xcb59f5e7"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-questions/", "id": "titration-questions", "title": "Titration questions", "description": "Questions pertaining to titration", "slug": "titration-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-introduction/", "id": "d1XTOsnNlgg", "title": "Titration introduction", "kind": "Video", "description": "Introduction to acid-base titrations using example of titrating 20.0 mL of HCl of unknown concentration with 0.100 M NaOH. Covers indicators, endpoint, equivalence point, and calculating the unknown concentration.", "slug": "titration-introduction"}, {"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-calculation-example/", "id": "aj34f2Bg9Vw", "title": "Titration calculation example", "kind": "Video", "description": "Example of titrating strong acid, hydrochloric acid, with strong base barium hydroxide. How to calculate the unknown concentration when you don't have a 1:1 molar ratio of H+ to OH-.", "slug": "titration-calculation-example"}, {"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-of-a-strong-acid-with-a-strong-base/", "id": "JoGQYSTlOKo", "title": "Titration of a strong acid with a strong base", "kind": "Video", "description": "Calculating the pH before the equivalence point for titration of strong acid, hydrochloric acid, with strong base, NaOH.", "slug": "titration-of-a-strong-acid-with-a-strong-base"}, {"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-of-a-strong-acid-with-a-strong-base-continued/", "id": "HO1dsNrzE58", "title": "Titration of a strong acid with a strong base (continued)", "kind": "Video", "description": "Calculating the pH at and after the equivalence point for titration of strong acid, hydrochloric acid, with strong base, NaOH.", "slug": "titration-of-a-strong-acid-with-a-strong-base-continued"}, {"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-of-a-weak-acid-with-a-strong-base/", "id": "x3CbfUr449Y", "title": "Titration of a weak acid with a strong base", "kind": "Video", "description": "Calculating the pH for titration of acetic acid with strong base NaOH before adding any base and at half-equivalence point.", "slug": "titration-of-a-weak-acid-with-a-strong-base"}, {"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-of-a-weak-acid-with-a-strong-base-continued/", "id": "WbDL7xN-Pn0", "title": "Titration of a weak acid with a strong base (continued)", "kind": "Video", "description": "Calculating the pH for titration of acetic acid with strong base NaOH at equivalence point and past the equivalence point.", "slug": "titration-of-a-weak-acid-with-a-strong-base-continued"}, {"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-of-a-weak-base-with-a-strong-acid/", "id": "pmHlKhv7C0E", "title": "Titration of a weak base with a strong acid", "kind": "Video", "description": "Calculating the pH for titration of weak base, ammonia, with strong acid, HCl, before any HCl is added and at half-equivalence point.", "slug": "titration-of-a-weak-base-with-a-strong-acid"}, {"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-of-a-weak-base-with-a-strong-acid-continued/", "id": "kWucfgOkCIQ", "title": "Titration of a weak base with a strong acid (continued)", "kind": "Video", "description": "Calculating the pH for titration of weak base, ammonia, with strong acid, HCl, at the equivalence point and past the equivalence point.", "slug": "titration-of-a-weak-base-with-a-strong-acid-continued"}, {"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/titration-curves-and-acid-base-indicators/", "id": "1YlXtpF-19A", "title": "Titration curves and acid-base indicators", "kind": "Video", "description": "Choosing the best indicator for different titrations depending on the pH at the equivalence point.", "slug": "titration-curves-and-acid-base-indicators"}, {"path": "khan/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria/redox-titration/", "id": "EQJf8Gb8pg4", "title": "Redox titration", "kind": "Video", "description": "A redox titration example: titrating an Fe(II) solution with potassium permanganate.", "slug": "redox-titration"}], "in_knowledge_map": false, "description": "Skrillex loved titrating solutions because he got to drop the base. Titrations are a technique that allow us to determine the concentration of an unknown by adding a known element to it until a specific change occurs. For instance, finding the acidity of a solution by adding standard base until the solution turns pink. Learn more about titrations and indicators by watching these examples.", "node_slug": "titrations-and-solubility-equilibria", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria", "extended_slug": "test-prep/mcat/chemical-processes/titrations-and-solubility-equilibria", "kind": "Topic", "slug": "titrations-and-solubility-equilibria"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/", "id": "solubility-equilibria-mcat", "hide": false, "title": "Solubility equilibria", "child_data": [{"kind": "Exercise", "id": "xe87488e4"}, {"kind": "Video", "id": "x39678e49"}, {"kind": "Video", "id": "xf784347d"}, {"kind": "Video", "id": "x17fb6c6c"}, {"kind": "Video", "id": "x9dbdb3a5"}, {"kind": "Video", "id": "x33617989"}, {"kind": "Video", "id": "x7212c366"}, {"kind": "Video", "id": "xd322f5e7"}, {"kind": "Article", "id": "x6f62a94d"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/solubility-equilibria-questions/", "id": "solubility-equilibria-questions", "title": "Solubility equilibria questions", "description": "Solubility equilibria questions", "slug": "solubility-equilibria-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/common-polyatomic-ions/", "id": "DpnUrVXSLaQ", "title": "Common polyatomic ions", "kind": "Video", "description": "Reviewing the common polyatomic ions, and explaining common suffixes and prefixes to help remember the formulas.", "slug": "common-polyatomic-ions"}, {"path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/dissolution-and-precipitation/", "id": "g_snytB7iQ0", "title": "Dissolution and precipitation", "kind": "Video", "description": "Defining solute, solvent, hydration, dissolution, precipitation, net ionic equation, and spectator ions. Looking at the molecular level interactions between water and ions in NaCl.", "slug": "dissolution-and-precipitation"}, {"path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/solubility-product-constant-from-the-solubility/", "id": "p4559dZIFco", "title": "Solubility product constant from the solubility", "kind": "Video", "description": "Introduction to solubility, molar solubility, and solubility product constant Ksp. Example of calculating the solubility of lead(II) chloride and Ksp.", "slug": "solubility-product-constant-from-the-solubility"}, {"path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/solubility-from-the-solubility-product-constant/", "id": "3rkDpqp-mw0", "title": "Solubility from the solubility product constant", "kind": "Video", "description": "Calculating the solubility of copper(II) hydroxide from Ksp using an ICE table.", "slug": "solubility-from-the-solubility-product-constant"}, {"path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/solubility-and-the-common-ion-effect/", "id": "pb-wsUpPuI8", "title": "Solubility and the common-ion effect", "kind": "Video", "description": "Calculating the molar solubility of lead(II) chloride in a 0.100 M solution of KCl using an ICE table.", "slug": "solubility-and-the-common-ion-effect"}, {"path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/solubility-and-the-ph-of-the-solution/", "id": "RrJY9dSbRtI", "title": "Solubility and the pH of the solution", "kind": "Video", "description": "Using le Chatelier's principle to see what happens to the solubility of calcium fluoride when pH is decreased. Also looks at effect of pH on solubility equilibrium for silver chloride.", "slug": "solubility-and-the-ph-of-the-solution"}, {"path": "khan/test-prep/mcat/chemical-processes/solubility-equilibria-mcat/solubility-and-complex-ion-formation/", "id": "r7gTH_5XfOI", "title": "Solubility and complex ion formation", "kind": "Video", "description": "Calculating the solubility of silver chloride in pure water and 3.0 M ammonia. Calculating new equilibrium constant to account for formation of complex ion.", "slug": "solubility-and-complex-ion-formation"}], "in_knowledge_map": false, "description": "When fresh water runs over a rock a little bit of the rock dissolves. When this mineral rich water dries a little, the rock can be redeposited. Reactants and products are always in equilibrium with each other. Learn how to calculate equilibrium constants and by watching these videos!", "node_slug": "solubility-equilibria-mcat", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/solubility-equilibria-mcat", "extended_slug": "test-prep/mcat/chemical-processes/solubility-equilibria-mcat", "kind": "Topic", "slug": "solubility-equilibria-mcat"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/dot-structures/", "id": "dot-structures", "hide": false, "title": "Dot structures", "child_data": [{"kind": "Exercise", "id": "x4a53fd5e"}, {"kind": "Video", "id": "x4b64d771"}, {"kind": "Video", "id": "x999bc93d"}, {"kind": "Video", "id": "xc17639e8"}, {"kind": "Video", "id": "x072a19ee"}, {"kind": "Video", "id": "xdf5e267d"}, {"kind": "Video", "id": "x13e2fe6f"}, {"kind": "Video", "id": "x6968389f"}, {"kind": "Video", "id": "x14b19da7"}, {"kind": "Video", "id": "x0795dd14"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/dot-structures/dot-structures-questions/", "id": "dot-structures-questions", "title": "Dot Structures Questions", "description": "Questions pertaining to Dot Structures", "slug": "dot-structures-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/dot-structures/drawing-dot-structures/", "id": "p7Fsb21B2Xg", "title": "Drawing dot structures", "kind": "Video", "description": "Guidelines for drawing Lewis dot structures.", "slug": "drawing-dot-structures"}, {"path": "khan/test-prep/mcat/chemical-processes/dot-structures/formal-charge-and-dot-structures/", "id": "dNPs-cr_6Bk", "title": "Formal charge and dot structures", "kind": "Video", "description": "Definition of formal charge, and how minimization of formal charge can help choose the more stable dot structure.", "slug": "formal-charge-and-dot-structures"}, {"path": "khan/test-prep/mcat/chemical-processes/dot-structures/resonance-and-dot-structures/", "id": "bUCu7bPkZeI", "title": "Resonance and dot structures", "kind": "Video", "description": "Drawing resonance structures and resonance hybrid using example of nitrate anion.", "slug": "resonance-and-dot-structures"}, {"path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-2-electron-clouds/", "id": "97POZGcfoY8", "title": "VSEPR for 2 electron clouds", "kind": "Video", "description": "Definition of VSEPR and examples of molecules with two electron clouds.", "slug": "vsepr-for-2-electron-clouds"}, {"path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-3-electron-clouds/", "id": "3RDytvJYehY", "title": "VSEPR for 3 electron clouds", "kind": "Video", "description": "VSEPR for three electron clouds including examples for trigonal planar and bent molecules.", "slug": "vsepr-for-3-electron-clouds"}, {"path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-4-electron-clouds/", "id": "ka8Yt4bTODs", "title": "VSEPR for 4 electron clouds", "kind": "Video", "description": "VSEPR for molecules with four electron clouds including examples for tetrahedral, trigonal pyramidal, and bent molecules.", "slug": "vsepr-for-4-electron-clouds"}, {"path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-5-electron-clouds/", "id": "0na0xtIHkXA", "title": "VSEPR for 5 electron clouds", "kind": "Video", "description": "VSEPR for molecules with five electron clouds including examples for trigonal bipyramidal and seesaw-shaped molecules.", "slug": "vsepr-for-5-electron-clouds"}, {"path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-5-electron-clouds-continued/", "id": "ufzlgOyWBHE", "title": "VSEPR for 5 electron clouds (continued)", "kind": "Video", "description": "Part II of using VSEPR for five electron clouds including examples for T-shaped and linear molecules.", "slug": "vsepr-for-5-electron-clouds-continued"}, {"path": "khan/test-prep/mcat/chemical-processes/dot-structures/vsepr-for-6-electron-clouds/", "id": "WEoml1Fs26I", "title": "VSEPR for 6 electron clouds", "kind": "Video", "description": "VSEPR for six electron clouds including examples for octahedral, square pyramidal, and planar molecules.", "slug": "vsepr-for-6-electron-clouds"}], "in_knowledge_map": false, "description": "5B: We can\u2019t always see molecules, but we can always simplify and draw depictions of them with simply pen and paper. It is the language of chemistry that we want you to get acquainted with. You will learn to draw Lewis dot structures and resonance structures, assign formal charges, and analyze the geometry of molecules and ions.", "node_slug": "dot-structures", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/dot-structures", "extended_slug": "test-prep/mcat/chemical-processes/dot-structures", "kind": "Topic", "slug": "dot-structures"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/stereochemistry/", "id": "stereochemistry", "hide": false, "title": "Stereochemistry", "child_data": [{"kind": "Exercise", "id": "xd7d6fad5"}, {"kind": "Article", "id": "x7a480082"}, {"kind": "Video", "id": "x76d2d9c0"}, {"kind": "Video", "id": "x8d536852"}, {"kind": "Video", "id": "x2e2a085c"}, {"kind": "Video", "id": "xf93f34c5"}, {"kind": "Video", "id": "x782cfec3"}, {"kind": "Video", "id": "xb8129286"}, {"kind": "Video", "id": "x394e2501"}, {"kind": "Video", "id": "xba150dc2"}, {"kind": "Video", "id": "x667d585d"}, {"kind": "Video", "id": "xb602b5af"}, {"kind": "Video", "id": "x247e5a2f"}, {"kind": "Video", "id": "xe69c6a56"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/stereochemistry-questions/", "id": "stereochemistry-questions", "title": "Stereochemistry questions", "description": "Questions pertaining to stereochemistry", "slug": "stereochemistry-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/structural-constitutional-isomers-new/", "id": "RBbJKOOZ6FY", "title": "Structural (constitutional) isomers", "kind": "Video", "description": "How to draw structural isomers using bond-line structures", "slug": "structural-constitutional-isomers-new"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/chiral-achiral-jay/", "id": "yChPRfm4yvg", "title": "Chiral vs achiral", "kind": "Video", "slug": "chiral-achiral-jay"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/stereoisomer-enantiomer-jay/", "id": "3Ya7I-oDGU0", "title": "Stereoisomers, enantiomers, and chirality centers", "kind": "Video", "slug": "stereoisomer-enantiomer-jay"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/chirality-center-jay/", "id": "ij1TfRMODhA", "title": "Identifying chirality centers", "kind": "Video", "slug": "chirality-center-jay"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/rs-system-new/", "id": "kFD6hzLseVs", "title": "R,S system", "kind": "Video", "description": "How to assign the configuration of a chirality center using the R,S system", "slug": "rs-system-new"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/rs-system-practice-new/", "id": "rzXRZFMcZyU", "title": "R,S system practice", "kind": "Video", "description": "How to assign a configuration to a chirality center using the R,S system", "slug": "rs-system-practice-new"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/optical-activity-new/", "id": "1LdFePZHAyY", "title": "Optical activity", "kind": "Video", "description": "How optically active compounds rotate plane polarized light", "slug": "optical-activity-new"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/enantiomers-and-diastereomers/", "id": "aYp39AaZqvI", "title": "Enantiomers and diastereomers", "kind": "Video", "description": "How to tell the difference between enantiomers and diastereomers", "slug": "enantiomers-and-diastereomers"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/cis-trans-isomerism/", "id": "JjtzMQDdyuM", "title": "Cis-trans isomerism", "kind": "Video", "description": "How to assign cis-trans terminology to double bonds", "slug": "cis-trans-isomerism"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/e-z-system-new/", "id": "7He7goTp6BY", "title": "E-Z system", "kind": "Video", "description": "How to use the E-Z system to assign configurations to double bonds", "slug": "e-z-system-new"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/conformations-of-ethane/", "id": "E52oU-pwDxY", "title": "Conformations of ethane", "kind": "Video", "description": "How to represent the staggered and eclipsed conformations of ethane", "slug": "conformations-of-ethane"}, {"path": "khan/test-prep/mcat/chemical-processes/stereochemistry/conformational-analysis-of-butane/", "id": "dTst62XXJ8g", "title": "Conformational analysis of butane", "kind": "Video", "description": "How to analyze the staggered and eclipsed conformations of butane", "slug": "conformational-analysis-of-butane"}], "in_knowledge_map": false, "description": "5B: Even molecules with the same chemical formula can have different shapes even though they may be comprised of the same atoms. For instance, with one sheet of paper, you can make origami swans of so many different shapes - similarly molecules can come in different conformations. We will walk through the concepts of structural and conformational isomers as well as stereoisomers and diastereomers", "node_slug": "stereochemistry", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/stereochemistry", "extended_slug": "test-prep/mcat/chemical-processes/stereochemistry", "kind": "Topic", "slug": "stereochemistry"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/", "id": "covalent-bonds", "hide": false, "title": "Covalent bonds", "child_data": [{"kind": "Exercise", "id": "x2ee9bacf"}, {"kind": "Article", "id": "x80673e48"}, {"kind": "Video", "id": "x57ecb61f"}, {"kind": "Article", "id": "x7954dee7"}, {"kind": "Video", "id": "x3d65853e"}, {"kind": "Video", "id": "x67a13ebc"}, {"kind": "Video", "id": "x0213e20b"}, {"kind": "Video", "id": "x03aa879e"}, {"kind": "Video", "id": "x3f29bc33"}, {"kind": "Video", "id": "x3fb4948a"}, {"kind": "Video", "id": "xafb6fb15"}, {"kind": "Video", "id": "xd0514fbc"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/covalent-bonds-questions/", "id": "covalent-bonds-questions", "title": "Covalent bonds questions", "description": "Questions pertaining to covalent bonds", "slug": "covalent-bonds-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/electronegativity-and-chemical-bonds/", "id": "126N4hox9YA", "title": "Electronegativity and bonding", "kind": "Video", "description": "Electronegativity differences in bonding using Pauling scale. Using differences in electronegativity to classify bonds as covalent, polar covalent, or ionic.", "slug": "electronegativity-and-chemical-bonds"}, {"path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/intermolecular-forces-and-molecular-bonds/", "id": "pBZ-RiT5nEE", "title": "Intermolecular forces", "kind": "Video", "description": "Identifying the intermolecular forces present between molecules", "slug": "intermolecular-forces-and-molecular-bonds"}, {"path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/sp3-hybrid-orbital-jay-final/", "id": "JHgTNNX01r4", "title": "Sp3 hybridization", "kind": "Video", "description": "Sp3 hybrid orbitals and properties of sigma bonds.", "slug": "sp3-hybrid-orbital-jay-final"}, {"path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/steric-number-sp3-hybridization/", "id": "BM-My1AheLw", "title": "Steric number and sp3 hybridization", "kind": "Video", "description": "Using steric number to calculate number of hybrid orbitals.", "slug": "steric-number-sp3-hybridization"}, {"path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/dipole-moment/", "id": "q3g3jsmCOEQ", "title": "Dipole moment", "kind": "Video", "slug": "dipole-moment"}, {"path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/sp2-hybridization-jay-final/", "id": "ROzkyTgscGg", "title": "Sp2 hybridization", "kind": "Video", "description": "Sp2 hybrid orbitals and properties of pi bonds.", "slug": "sp2-hybridization-jay-final"}, {"path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/sp-hybridization-jay-final/", "id": "BRHfy7envyQ", "title": "Sp hybridization", "kind": "Video", "description": "Sp hybrid orbitals and properties of triple bonds.", "slug": "sp-hybridization-jay-final"}, {"path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/organic-hybridization-practice/", "id": "GuaozMpFS3w", "title": "Organic hybridization practice", "kind": "Video", "description": "Examples of identifying hybridization and geometry for atoms in organic molecules.", "slug": "organic-hybridization-practice"}, {"path": "khan/test-prep/mcat/chemical-processes/covalent-bonds/acid-base-definitions-1/", "id": "ss7Ap-6bFYw", "title": "Acid-base definitions", "kind": "Video", "slug": "acid-base-definitions-1"}], "in_knowledge_map": false, "description": "5B: Eating popcorn alone at a movie theater can be quite lonely - but sharing with someone special can feel...well, special! Sharing is caring is caring with atoms too! In a covalent bond, two atoms share electron pairs in their orbitals. We will discuss the mechanism of this bonding as well as the idea of electron orbital hybridization in this tutorial.", "node_slug": "covalent-bonds", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/covalent-bonds", "extended_slug": "test-prep/mcat/chemical-processes/covalent-bonds", "kind": "Topic", "slug": "covalent-bonds"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/separations-purifications/", "id": "separations-purifications", "hide": false, "title": "Separations and purifications", "child_data": [{"kind": "Exercise", "id": "x72c7eeba"}, {"kind": "Video", "id": "x348a60e3"}, {"kind": "Video", "id": "xc80e4cd2"}, {"kind": "Article", "id": "xb259a5b5"}, {"kind": "Video", "id": "x9ba4db97"}, {"kind": "Video", "id": "x7d03c65d"}, {"kind": "Video", "id": "x053d4072"}, {"kind": "Video", "id": "x78f82f7d"}, {"kind": "Video", "id": "x8f8294e8"}, {"kind": "Video", "id": "x42794516"}, {"kind": "Video", "id": "xc7c3f9d1"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/separations-purifications/separations-and-purifications-questions/", "id": "separations-and-purifications-questions", "title": "Separations and purifications questions", "description": "Questions pertaining to separations and purifications", "slug": "separations-and-purifications-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/separations-purifications/simple-and-fractional-distillations/", "id": "3pL2X-8-eVk", "title": "Simple and fractional distillations", "kind": "Video", "description": "Learn how chemicals can be separated and purified through distillation, a process which separates them based on their respective boiling points. By Angela Guerrero.", "slug": "simple-and-fractional-distillations"}, {"path": "khan/test-prep/mcat/chemical-processes/separations-purifications/extractions/", "id": "NgsuPTLkPgs", "title": "Extractions", "kind": "Video", "description": "Learn about how chemicals can be separated through acid-base extraction. By Angela Guerrero.", "slug": "extractions"}, {"path": "khan/test-prep/mcat/chemical-processes/separations-purifications/basics-of-chromatography/", "id": "SnbXQTTHGs4", "title": "Basics of chromatography", "kind": "Video", "description": "Understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exchange, ion exchange, affinity, HPLC, and. By Angela Guerrero.", "slug": "basics-of-chromatography"}, {"path": "khan/test-prep/mcat/chemical-processes/separations-purifications/thin-layer-chromatography/", "id": "e3lRt9XdV0s", "title": "Thin layer chromatography (TLC)", "kind": "Video", "description": "Learn about how chemicals can be separated based on polarity through thin layer chromatography (TLC). By Angela Guerrero.", "slug": "thin-layer-chromatography"}, {"path": "khan/test-prep/mcat/chemical-processes/separations-purifications/calculating-retention-factors-for-tlc/", "id": "_DEScXFyI8s", "title": "Calculating retention factors for TLC", "kind": "Video", "description": "Learn how to calculate retention factors (Rf) for thin layer chromatography (TLC). By Angela Guerrero.", "slug": "calculating-retention-factors-for-tlc"}, {"path": "khan/test-prep/mcat/chemical-processes/separations-purifications/column-chromatography/", "id": "EOJrRnpiq5s", "title": "Column chromatography", "kind": "Video", "description": "Learn how to separate chemicals using column chromatography. By Angela Guerrero.", "slug": "column-chromatography"}, {"path": "khan/test-prep/mcat/chemical-processes/separations-purifications/gas-chromatography/", "id": "4Xaa9WdXVTM", "title": "Gas chromatography", "kind": "Video", "description": "Understand how to separate and purify chemicals through gas chromatography and how to interpret a gas chromatogram. By Angela Guerrero.", "slug": "gas-chromatography"}, {"path": "khan/test-prep/mcat/chemical-processes/separations-purifications/gel-electrophoresis/", "id": "mN5IvS96wNk", "title": "Gel electrophoresis", "kind": "Video", "description": "Learn how gel electrophoresis separates DNA and protein fragments based on size and why one would use agarose gel electrophoresis versus SDS-PAGE. By Angela Guerrero.", "slug": "gel-electrophoresis"}, {"path": "khan/test-prep/mcat/chemical-processes/separations-purifications/resolution-of-enantiomers/", "id": "b2IpkXid-ec", "title": "Resolution of enantiomers", "kind": "Video", "description": "Understand how enantiomers can be isolated from a racemic mixture using chromatography with a chiral stationary phase. By Angela Guerrero.", "slug": "resolution-of-enantiomers"}], "in_knowledge_map": false, "description": "5C: Did you know that digitalis, one of the oldest medicines used to increase cardiac contractility, is derived from the foxglove plant? When you are in the Amazon rainforest searching for a cure for cancer in a new exotic plant, your potential miracle drug of interest is not originally pure - it must be separated from the other contaminating components. Through these tutorials you will learn how to separate and purify chemical compounds using organic chemistry lab techniques such as extraction, distillation, chromatography, and gel electrophoresis.", "node_slug": "separations-purifications", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/separations-purifications", "extended_slug": "test-prep/mcat/chemical-processes/separations-purifications", "kind": "Topic", "slug": "separations-purifications"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/", "id": "nucleic-acids-lipids-and-carbohydrates", "hide": false, "title": "Nucleic acids, lipids, and carbohydrates", "child_data": [{"kind": "Exercise", "id": "x228c6419"}, {"kind": "Video", "id": "x2fb5e8b8"}, {"kind": "Video", "id": "x01e0c840"}, {"kind": "Video", "id": "x3a46fc9e"}, {"kind": "Video", "id": "xb0227c35"}, {"kind": "Video", "id": "x1b8b18c6"}, {"kind": "Video", "id": "xca4b068d"}, {"kind": "Video", "id": "1258919438"}, {"kind": "Video", "id": "xc9c3e3c8"}, {"kind": "Video", "id": "xb4a4cc38"}, {"kind": "Video", "id": "x9a7e09a7"}, {"kind": "Video", "id": "6022769"}, {"kind": "Video", "id": "x7ad8555e"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/nucleic-acids-lipids-and-carbohydrates-questions/", "id": "nucleic-acids--lipids--and-carbohydrates-questions", "title": "Nucleic acids, lipids, and carbohydrates questions", "description": "Questions pertaining to nucleic acids, lipids, and carbohydrates", "slug": "nucleic-acids-lipids-and-carbohydrates-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/nucleic-acid-structure-1/", "id": "NX0ZPtB_QFY", "title": "Nucleic acid structure 1", "kind": "Video", "slug": "nucleic-acid-structure-1"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/nucleic-acid-structure-2/", "id": "2-nCSLMGwhI", "title": "Nucleic acid structure 2", "kind": "Video", "slug": "nucleic-acid-structure-2"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/saponification-base-promoted-ester-hydrolysis/", "id": "bXmODOOJcQU", "title": "Saponification - Base promoted ester hydrolysis", "kind": "Video", "slug": "saponification-base-promoted-ester-hydrolysis"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/lipids-structure-in-cell-membranes/", "id": "EL5kJ-Mzuug", "title": "Lipids - Structure in cell membranes", "kind": "Video", "slug": "lipids-structure-in-cell-membranes"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/lipids-as-cofactors-and-signaling-molecules/", "id": "lsvqJfvWRfs", "title": "Lipids as cofactors and signaling molecules", "kind": "Video", "slug": "lipids-as-cofactors-and-signaling-molecules"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/carbohydrates-naming-and-classification-1/", "id": "UBIyl4_oNYU", "title": "Carbohydrates - Naming and classification", "kind": "Video", "slug": "carbohydrates-naming-and-classification-1"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/fischer-projections/", "id": "gmo5TOxk_E0", "title": "Fischer projections", "kind": "Video", "slug": "fischer-projections"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/carbohydrates-epimers-common-names/", "id": "Pz-uLRZS8YM", "title": "Carbohydrates - Epimers, common names", "kind": "Video", "slug": "carbohydrates-epimers-common-names"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/carbohydrates-cyclic-structures-and-anomers-1/", "id": "4ztQjBGbecw", "title": "Carbohydrates - Cyclic structures and anomers", "kind": "Video", "slug": "carbohydrates-cyclic-structures-and-anomers-1"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/carbohydrate-glycoside-formation-hydrolysis/", "id": "g9qJ19vmGQA", "title": "Carbohydrate - Glycoside formation hydrolysis", "kind": "Video", "slug": "carbohydrate-glycoside-formation-hydrolysis"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/keto-enol-tautomerization/", "id": "SXbc4J1qWjE", "title": "Keto-enol tautomerization (by Sal)", "kind": "Video", "description": "Keto Enol Tautomerization", "slug": "keto-enol-tautomerization"}, {"path": "khan/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates/disaccharides-and-polysaccharides/", "id": "N2c78pv7f1g", "title": "Disaccharides and polysaccharides", "kind": "Video", "slug": "disaccharides-and-polysaccharides"}], "in_knowledge_map": false, "description": "The following videos outline the functions lipids and carbohydrates. Lipids are important in energy storage, signaling, and cellular structure. Carbohydrates are also important for energy storage, so we\u2019ll talk about those too.", "node_slug": "nucleic-acids-lipids-and-carbohydrates", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates", "extended_slug": "test-prep/mcat/chemical-processes/nucleic-acids-lipids-and-carbohydrates", "kind": "Topic", "slug": "nucleic-acids-lipids-and-carbohydrates"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/", "id": "amino-acids-peptides-proteins-5d", "hide": false, "title": "Amino acids, peptides, proteins", "child_data": [{"kind": "Exercise", "id": "xb443b8a3"}, {"kind": "Video", "id": "x26d6c1bf"}, {"kind": "Video", "id": "x2958f130"}, {"kind": "Article", "id": "x538a73df"}, {"kind": "Video", "id": "xcabbce1c"}, {"kind": "Video", "id": "xd30895ea"}, {"kind": "Video", "id": "x65a0c725"}, {"kind": "Video", "id": "x3639c4fb"}, {"kind": "Video", "id": "xa5d86a39"}, {"kind": "Video", "id": "xebba8bf7"}, {"kind": "Video", "id": "xaff1b54c"}, {"kind": "Article", "id": "x8766a11e"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/amino-acids-and-proteins-questions/", "id": "amino-acids-and-proteins-questions", "title": "Amino acids and proteins questions", "description": "Amino acids and proteins questions", "slug": "amino-acids-and-proteins-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/central-dogma-of-molecular-biology-2/", "id": "KIvBn6gfRgY", "title": "Central dogma of molecular biology", "kind": "Video", "slug": "central-dogma-of-molecular-biology-2"}, {"path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/central-dogma-revisited/", "id": "Yv94eGD7cUU", "title": "Central dogma - revisited", "kind": "Video", "description": "New discoveries have expanded on or even contradicted the original Central dogma of molecular biology as proposed by Watson and Crick. These discoveries include multiple alternate pathways of the molecules as well as different types of RNA that you'll need to know. By Tracy Kovach.", "slug": "central-dogma-revisited"}, {"path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/peptide-bond-formation-and-cleavage/", "id": "pmQuNRHJMw4", "title": "Peptide bonds: Formation and cleavage", "kind": "Video", "description": "Peptide bonds are formed when the amine group of one amino acid binds with the carbonyl carbon of another amino acid. We will learn more about peptide bonds and how the cleaving process occurs. \u00a0By Tracy Kovach.", "slug": "peptide-bond-formation-and-cleavage"}, {"path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/special-cases-histidine-proline-glycine-cysteine/", "id": "2_IJz1ivopQ", "title": "Special cases: Histidine, proline, glycine, cysteine", "kind": "Video", "description": "Certain amino acids stand out for their unique properties. In this video, you'll learn more about what makes histidine, proline, glycine, and cysteine unique.\u00a0 By Tracy Kovach.", "slug": "special-cases-histidine-proline-glycine-cysteine"}, {"path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/amino-acid-structure/", "id": "BbZB-WBVFSk", "title": "Amino acid structure", "kind": "Video", "description": "In this video, you'll learn about the general structure of amino acids, which include an amine group, a carboxylic acid group, and a unique side chain (R-group) attached to the alpha carbon. In addition, we'll explore where amino acids fit in terms of biological metabolism. By Tracy Kovach.", "slug": "amino-acid-structure"}, {"path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/isoelectric-point-and-zwitterions/", "id": "42llTiRn-b8", "title": "Isoelectric point and zwitterions", "kind": "Video", "description": "The isoelectric point of an amino acid is the pH at which the amino acid has a neutral charge. You will learn how to calculate the isoelectric point, and the effects of pH on the amino acid's overall charge. We will also discuss zwitterions, or the forms of amino acids that dominate at the isoelectric point. By Tracy Kovach.", "slug": "isoelectric-point-and-zwitterions"}, {"path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/classification-amino-acids/", "id": "OPAvXQsPCqQ", "title": "Classification of amino acids", "kind": "Video", "description": "Amino acids can be classified according to their side chain's chemical properties (the R-group). This video will show you how! By Tracy Kovach.", "slug": "classification-amino-acids"}, {"path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/four-levels-of-protein-structure/", "id": "O5gN-IK6uKs", "title": "Four levels of protein structure", "kind": "Video", "description": "The four levels of protein structure are primary, secondary, tertiary, and quaternary. It is helpful to understand the nature and function of each level of protein structure in order to fully understand how a protein works. \u00a0By Tracy Kovach.", "slug": "four-levels-of-protein-structure"}, {"path": "khan/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/conformational-stability-protein-folding-and-denaturation/", "id": "dNHtdiVjQbM", "title": "Conformational stability: Protein folding and denaturation", "kind": "Video", "description": "Different bonds/interactions contribute to the stability of each level of protein structure. Let's explore some common ones such as peptide bonds, hydrogen bonds, and disulfide bonds. By Tracy Kovach.", "slug": "conformational-stability-protein-folding-and-denaturation"}], "in_knowledge_map": false, "description": "", "node_slug": "amino-acids-peptides-proteins-5d", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d", "extended_slug": "test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d", "kind": "Topic", "slug": "amino-acids-peptides-proteins-5d"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/proteins/", "id": "proteins", "hide": false, "title": "Proteins", "child_data": [{"kind": "Exercise", "id": "x6d94f7d7"}, {"kind": "Video", "id": "x65a0c725"}, {"kind": "Video", "id": "x66e29107"}, {"kind": "Video", "id": "xa5d86a39"}, {"kind": "Video", "id": "xcabbce1c"}, {"kind": "Video", "id": "xebba8bf7"}, {"kind": "Video", "id": "x903d5032"}, {"kind": "Video", "id": "xe819d5b4"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/proteins/proteins-questions/", "id": "proteins-questions", "title": "Proteins questions", "description": "Questions pertaining to proteins", "slug": "proteins-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/proteins/amino-acid-structure/", "id": "BbZB-WBVFSk", "title": "Amino acid structure", "kind": "Video", "description": "In this video, you'll learn about the general structure of amino acids, which include an amine group, a carboxylic acid group, and a unique side chain (R-group) attached to the alpha carbon. In addition, we'll explore where amino acids fit in terms of biological metabolism. By Tracy Kovach.", "slug": "amino-acid-structure"}, {"path": "khan/test-prep/mcat/chemical-processes/proteins/alpha-amino-acid-synthesis/", "id": "T_mFhtBja5A", "title": "Alpha amino acid synthesis", "kind": "Video", "slug": "alpha-amino-acid-synthesis"}, {"path": "khan/test-prep/mcat/chemical-processes/proteins/classification-amino-acids/", "id": "OPAvXQsPCqQ", "title": "Classification of amino acids", "kind": "Video", "description": "Amino acids can be classified according to their side chain's chemical properties (the R-group). This video will show you how! By Tracy Kovach.", "slug": "classification-amino-acids"}, {"path": "khan/test-prep/mcat/chemical-processes/proteins/peptide-bond-formation-and-cleavage/", "id": "pmQuNRHJMw4", "title": "Peptide bonds: Formation and cleavage", "kind": "Video", "description": "Peptide bonds are formed when the amine group of one amino acid binds with the carbonyl carbon of another amino acid. We will learn more about peptide bonds and how the cleaving process occurs. \u00a0By Tracy Kovach.", "slug": "peptide-bond-formation-and-cleavage"}, {"path": "khan/test-prep/mcat/chemical-processes/proteins/four-levels-of-protein-structure/", "id": "O5gN-IK6uKs", "title": "Four levels of protein structure", "kind": "Video", "description": "The four levels of protein structure are primary, secondary, tertiary, and quaternary. It is helpful to understand the nature and function of each level of protein structure in order to fully understand how a protein works. \u00a0By Tracy Kovach.", "slug": "four-levels-of-protein-structure"}, {"path": "khan/test-prep/mcat/chemical-processes/proteins/conformational-stability-protein-folding-and-denaturation/", "id": "gXa6JIv5WlQ", "title": "Conformational stability: Protein folding and denaturation", "kind": "Video", "slug": "conformational-stability-protein-folding-and-denaturation"}, {"path": "khan/test-prep/mcat/chemical-processes/proteins/non-enzymatic-protein-function/", "id": "eVmLvbB6L18", "title": "Non-enzymatic protein function", "kind": "Video", "slug": "non-enzymatic-protein-function"}], "in_knowledge_map": false, "description": "5D: DNA makes RNA, and RNA makes proteins,, which are one of the most important biomolecules of our bodies. They are comprised of even smaller amino acids, which are held together by peptide bonds to form proteins. You will discover the structure and functions of proteins at the cellular level in this tutorial.", "node_slug": "proteins", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/proteins", "extended_slug": "test-prep/mcat/chemical-processes/proteins", "kind": "Topic", "slug": "proteins"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/mcat/chemical-processes/carbohydrates-5d/", "id": "carbohydrates-5d", "hide": false, "title": "Carbohydrates", "child_data": [{"kind": "Video", "id": "x2a49b048"}, {"kind": "Video", "id": "x60bbc15a"}, {"kind": "Video", "id": "xadddf3af"}, {"kind": "Video", "id": "x1761796b"}, {"kind": "Video", "id": "xe885dfb1"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/carbohydrates-5d/carbohydrates-di-and-polysaccharides/", "id": "e_WWO2O5Nb8", "title": "Carbohydrates- di and polysaccharides", "kind": "Video", "slug": "carbohydrates-di-and-polysaccharides"}, {"path": "khan/test-prep/mcat/chemical-processes/carbohydrates-5d/carbohydrates-cyclic-structures-and-anomers/", "id": "UPgpYH9ZtMA", "title": "Carbohydrates - cyclic structures and anomers", "kind": "Video", "slug": "carbohydrates-cyclic-structures-and-anomers"}, {"path": "khan/test-prep/mcat/chemical-processes/carbohydrates-5d/carbohydrates-absolute-configuration-epimers-common-names/", "id": "U5xnGyw2llY", "title": "Carbohydrates - absolute configuration, epimers, common names", "kind": "Video", "slug": "carbohydrates-absolute-configuration-epimers-common-names"}, {"path": "khan/test-prep/mcat/chemical-processes/carbohydrates-5d/carbohydrates-naming-and-classification/", "id": "doe_zZDjU5c", "title": "Carbohydrates - naming and classification", "kind": "Video", "slug": "carbohydrates-naming-and-classification"}, {"path": "khan/test-prep/mcat/chemical-processes/carbohydrates-5d/keto-enol-tautomerization-2/", "id": "NdRl1C6Jr5o", "title": "Keto-enol tautomerization (by Jay)", "kind": "Video", "description": "Mechanisms for acid and base catalyzed keto-enol tautomerization. By Jay.", "slug": "keto-enol-tautomerization-2"}], "in_knowledge_map": false, "description": "Table sugar and corn syrup have the same chemical formula, so why do they taste different? The answer is in their stereochemistry. Learn how to assign chirality, interpret Fischer projections, and differentiate between different mono- and poly-saccharides in the following videos.", "node_slug": "carbohydrates-5d", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/carbohydrates-5d", "extended_slug": "test-prep/mcat/chemical-processes/carbohydrates-5d", "kind": "Topic", "slug": "carbohydrates-5d"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/", "id": "alpha-carbon-chemistry", "hide": false, "title": "Alpha-carbon chemistry", "child_data": [{"kind": "Exercise", "id": "x7dddffce"}, {"kind": "Article", "id": "x79154ec7"}, {"kind": "Video", "id": "xe885dfb1"}, {"kind": "Video", "id": "x098c1f45"}, {"kind": "Video", "id": "xaea0840a"}, {"kind": "Video", "id": "xaf94b7bc"}, {"kind": "Video", "id": "x96be1299"}, {"kind": "Video", "id": "xd46c67f7"}, {"kind": "Video", "id": "x690d8530"}, {"kind": "Video", "id": "xb71ae0d8"}, {"kind": "Video", "id": "x246923bf"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/alpha-carbon-chemistry-questions/", "id": "alpha-carbon-chemistry-questions", "title": "Alpha-carbon chemistry questions", "description": "Questions pertaining to alpha-carbon chemistry", "slug": "alpha-carbon-chemistry-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/keto-enol-tautomerization-2/", "id": "NdRl1C6Jr5o", "title": "Keto-enol tautomerization (by Jay)", "kind": "Video", "description": "Mechanisms for acid and base catalyzed keto-enol tautomerization. By Jay.", "slug": "keto-enol-tautomerization-2"}, {"path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/enolate-formation-from-aldehydes/", "id": "bhxo9Wwr4mA", "title": "Enolate formation from aldehydes", "kind": "Video", "description": "How to form enolates from aldehydes using sodium ethoxide and sodium hydride", "slug": "enolate-formation-from-aldehydes"}, {"path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/enolate-formation-from-ketones/", "id": "lhRfE13mM70", "title": "Enolate formation from ketones", "kind": "Video", "description": "Forming enolates from ketones using LDA and sodium ethoxide", "slug": "enolate-formation-from-ketones"}, {"path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/kinetic-and-thermodynamic-enolates/", "id": "sBuM8hTGlag", "title": "Kinetic and thermodynamic enolates", "kind": "Video", "description": "How to form different enolates from ketones", "slug": "kinetic-and-thermodynamic-enolates"}, {"path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/aldol-condensation/", "id": "sjMsyk-rP8I", "title": "Aldol condensation", "kind": "Video", "description": "Base-catalyzed mechanism for aldol addition and aldol condensation", "slug": "aldol-condensation"}, {"path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/mixed-crossed-aldol-condensation/", "id": "NAW1pqHs2_c", "title": "Mixed (crossed) aldol condensation", "kind": "Video", "description": "How to find the product of a mixed (crossed) aldol condensation", "slug": "mixed-crossed-aldol-condensation"}, {"path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/mixed-crossed-aldol-condensation-using-a-lithium-enolate/", "id": "g0_bWq24Np0", "title": "Mixed (crossed) aldol condensation using a lithium enolate", "kind": "Video", "description": "How to direct a mixed aldol condensation using a lithium enolate", "slug": "mixed-crossed-aldol-condensation-using-a-lithium-enolate"}, {"path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/retro-aldol-and-retrosynthesis/", "id": "dKFE0uJayM8", "title": "Retro-aldol and retrosynthesis", "kind": "Video", "description": "How to think about the aldol condensation using retrosynthesis", "slug": "retro-aldol-and-retrosynthesis"}, {"path": "khan/test-prep/mcat/chemical-processes/alpha-carbon-chemistry/intramolecular-aldol-condensation/", "id": "NSPrIjA6T-c", "title": "Intramolecular aldol condensation", "kind": "Video", "description": "How to determine the product of an intramolecular aldol condensation", "slug": "intramolecular-aldol-condensation"}], "in_knowledge_map": false, "description": "5D: Aldol condensations are one of the most important, frequently seen reactions in biochemistry. In fact, the very first reaction of the Krebs (TCA) cycle is an aldol condensation in which acetyl CoA condenses with oxaloacetate, forming citrate. You will learn the mechanism of these reactions formed as we extend this concept to predict the products of aldol condensations.", "node_slug": "alpha-carbon-chemistry", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/alpha-carbon-chemistry", "extended_slug": "test-prep/mcat/chemical-processes/alpha-carbon-chemistry", "kind": "Topic", "slug": "alpha-carbon-chemistry"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/", "id": "aldehydes-and-ketones", "hide": false, "title": "Aldehydes and ketones", "child_data": [{"kind": "Exercise", "id": "xe09d4373"}, {"kind": "Video", "id": "xe80d8a0e"}, {"kind": "Video", "id": "x9e2c8f29"}, {"kind": "Video", "id": "x9ddc232e"}, {"kind": "Video", "id": "xbc22ce4f"}, {"kind": "Video", "id": "x9477eb73"}, {"kind": "Video", "id": "x5f7d086c"}, {"kind": "Video", "id": "x7327d20a"}, {"kind": "Video", "id": "x49f0789d"}, {"kind": "Video", "id": "xcac5c01c"}, {"kind": "Video", "id": "xb3f287ad"}, {"kind": "Video", "id": "x18386c36"}, {"kind": "Video", "id": "xb08f7f0a"}, {"kind": "Video", "id": "xd9c3a4be"}, {"kind": "Article", "id": "x3fa8312d"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/aldehydes-and-ketones-questions/", "id": "aldehydes-and-ketones-questions", "title": "Aldehydes and ketones questions", "description": "Questions pertaining to aldehydes and ketones", "slug": "aldehydes-and-ketones-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/nomenclature-of-aldehydes-and-ketones/", "id": "JMsqu236bZo", "title": "Nomenclature of aldehydes and ketones", "kind": "Video", "slug": "nomenclature-of-aldehydes-and-ketones"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/physical-properties-of-aldehydes-and-ketones/", "id": "4lbVBMLZ1jQ", "title": "Physical properties of aldehydes and ketones", "kind": "Video", "slug": "physical-properties-of-aldehydes-and-ketones"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/reactivity-of-aldehydes-and-ketones/", "id": "BlBQBOb0OQ4", "title": "Reactivity of aldehydes and ketones", "kind": "Video", "slug": "reactivity-of-aldehydes-and-ketones"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/formation-of-hydrates/", "id": "632MAqIB14E", "title": "Formation of hydrates", "kind": "Video", "slug": "formation-of-hydrates"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/formation-of-hemiacetals/", "id": "FGq9-R6Yw18", "title": "Formation of hemiacetals", "kind": "Video", "slug": "formation-of-hemiacetals"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/acid-and-base-catalyzed-formation-of-hydrates-and-hemiacetals/", "id": "rL0lDESwwv8", "title": "Acid and base catalyzed formation of hydrates and hemiacetals", "kind": "Video", "slug": "acid-and-base-catalyzed-formation-of-hydrates-and-hemiacetals"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/formation-of-acetals/", "id": "8-ccnvn9DxI", "title": "Formation of acetals", "kind": "Video", "slug": "formation-of-acetals"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/acetals-as-protecting-groups-and-thioacetals/", "id": "fY_ejjMRYg0", "title": "Acetals as protecting groups and thioacetals", "kind": "Video", "slug": "acetals-as-protecting-groups-and-thioacetals"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/formation-of-imines-and-enamines/", "id": "Gl7bQNm92fE", "title": "Formation of imines and enamines", "kind": "Video", "slug": "formation-of-imines-and-enamines"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/formation-of-oximes-and-hydrazones/", "id": "gSzxeL64Cn0", "title": "Formation of oximes and hydrazones", "kind": "Video", "slug": "formation-of-oximes-and-hydrazones"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/addition-of-carbon-nucleophiles-to-aldehydes-and-ketones/", "id": "D5-1qEKtfQ4", "title": "Addition of carbon nucleophiles to aldehydes and ketones", "kind": "Video", "slug": "addition-of-carbon-nucleophiles-to-aldehydes-and-ketones"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/formation-of-alcohols-using-hydride-reducing-agents/", "id": "uWJRx-5n1yw", "title": "Formation of alcohols using hydride reducing agents", "kind": "Video", "slug": "formation-of-alcohols-using-hydride-reducing-agents"}, {"path": "khan/test-prep/mcat/chemical-processes/aldehydes-and-ketones/oxidation-of-aldehydes-using-tollens-reagent/", "id": "_0TqG8-N8DI", "title": "Oxidation of aldehydes using Tollens' reagent", "kind": "Video", "slug": "oxidation-of-aldehydes-using-tollens-reagent"}], "in_knowledge_map": false, "description": "5D: Have you ever dissected a preserved cadaver in anatomy class? That stench you remember is the smell of formaldehyde used to preserve it. Formaldehyde is an aldehyde a class of molecules we will discuss along with its cousin the ketone. We will discuss their formation as well as how they interact in various chemical reactions as we walk through some real-world examples.", "node_slug": "aldehydes-and-ketones", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/aldehydes-and-ketones", "extended_slug": "test-prep/mcat/chemical-processes/aldehydes-and-ketones", "kind": "Topic", "slug": "aldehydes-and-ketones"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/", "id": "alcohols-and-phenols", "hide": false, "title": "Alcohols and phenols", "child_data": [{"kind": "Exercise", "id": "xbecfb0c3"}, {"kind": "Video", "id": "x7b36cf45"}, {"kind": "Video", "id": "x45bfbd29"}, {"kind": "Article", "id": "x81da1379"}, {"kind": "Video", "id": "x48815a7c"}, {"kind": "Video", "id": "xfb40ae53"}, {"kind": "Video", "id": "xec775fab"}, {"kind": "Video", "id": "xd69060c0"}, {"kind": "Video", "id": "xdd8cee30"}, {"kind": "Video", "id": "xb19c1cd0"}, {"kind": "Video", "id": "xd613715e"}, {"kind": "Video", "id": "xf8b0b315"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/alcohols-and-phenols-questions/", "id": "alcohols-and-phenols-questions", "title": "Alcohols and phenols questions", "description": "Questions pertaining to alcohols and phenols", "slug": "alcohols-and-phenols-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/alcohol-nomenclature-rules/", "id": "h3iIi56Yae8", "title": "Alcohol nomenclature", "kind": "Video", "slug": "alcohol-nomenclature-rules"}, {"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/properties-of-alcohols/", "id": "8p6R5yJjAGE", "title": "Properties of alcohols", "kind": "Video", "slug": "properties-of-alcohols"}, {"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/oxidation-of-alcohols/", "id": "wyxqq9Tc7GQ", "title": "Oxidation of alcohols", "kind": "Video", "slug": "oxidation-of-alcohols"}, {"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/oxidation-of-alcohols-example/", "id": "P4DiY4DvvmY", "title": "Oxidation of alcohols (examples)", "kind": "Video", "slug": "oxidation-of-alcohols-example"}, {"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/protection-of-alcohols/", "id": "KsdZsWOsB84", "title": "Protection of alcohols", "kind": "Video", "description": "Questions pertaining to alcohols and phenols", "slug": "protection-of-alcohols"}, {"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/preparation-of-mesylates-and-tosylates/", "id": "rR0LdZ-PfBk", "title": "Preparation of mesylates and tosylates", "kind": "Video", "slug": "preparation-of-mesylates-and-tosylates"}, {"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/sn1-sn2-alcohols/", "id": "KPh60w6McPI", "title": "SN1 and SN2 reactions of alcohols", "kind": "Video", "slug": "sn1-sn2-alcohols"}, {"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/biologic-redox-reactions-of-alcohols-and-phenols/", "id": "0w96SqrvVjw", "title": "Biological redox reactions of alcohols and phenols", "kind": "Video", "slug": "biologic-redox-reactions-of-alcohols-and-phenols"}, {"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/aromatic-stability-of-benzene/", "id": "4eZpJo_60QQ", "title": "Aromatic stability of benzene", "kind": "Video", "slug": "aromatic-stability-of-benzene"}, {"path": "khan/test-prep/mcat/chemical-processes/alcohols-and-phenols/aromatic-heterocycles/", "id": "IaE632EzCxM", "title": "Aromatic heterocycles", "kind": "Video", "slug": "aromatic-heterocycles"}], "in_knowledge_map": false, "description": "5D: If you\u2019ve ever walked through the wards of a hospital, you\u2019ve probably noticed dozens of alcohol-based hand sanitizer dispensers, which quickly clean the hands of healthcare workers between seeing patients. Alcohols serve many other functions. You will gain a strong understanding of the nomenclature, properties and reactions of alcohols and phenols, along with the criteria for determining aromaticity in heterocyles. By the way, if you\u2019re wondering where the term \u201caromaticity\u201d comes from, many of the earliest aromatic compounds, like benzene and toluene, were noted to have pleasant odors, and the name for this structural class has stuck ever since.", "node_slug": "alcohols-and-phenols", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/alcohols-and-phenols", "extended_slug": "test-prep/mcat/chemical-processes/alcohols-and-phenols", "kind": "Topic", "slug": "alcohols-and-phenols"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/", "id": "carboxylic-acids", "hide": false, "title": "Carboxylic acids", "child_data": [{"kind": "Exercise", "id": "x5640c108"}, {"kind": "Article", "id": "x6a858fe1"}, {"kind": "Video", "id": "x88ae23a9"}, {"kind": "Video", "id": "x7c382d2e"}, {"kind": "Video", "id": "x06fa08f9"}, {"kind": "Video", "id": "x63b9f13f"}, {"kind": "Video", "id": "x88af37b3"}, {"kind": "Video", "id": "x04b07e8a"}, {"kind": "Video", "id": "x20b158db"}, {"kind": "Video", "id": "x8f5687c8"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/carboxylic-acid-questions/", "id": "carboxylic-acid-questions", "title": "Carboxylic acid questions", "description": "Questions pertaining to carboxylic acid", "slug": "carboxylic-acid-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/carboxylic-acid-nomenclature-and-properties/", "id": "xgDuzj51tAc", "title": "Carboxylic acid nomenclature and properties", "kind": "Video", "description": "Naming carboxylic acids and analyzing their physical properties", "slug": "carboxylic-acid-nomenclature-and-properties"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/reduction-of-carboxylic-acids/", "id": "zR4OaoiNkA0", "title": "Reduction of carboxylic acids", "kind": "Video", "description": "How to reduce carboxylic acids using lithium aluminum hydride (and borane)", "slug": "reduction-of-carboxylic-acids"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/preparation-of-esters-via-fischer-esterification/", "id": "ynBuPEmcjp4", "title": "Preparation of esters via Fischer esterification", "kind": "Video", "description": "How to draw the mechanism for a Fischer esterification", "slug": "preparation-of-esters-via-fischer-esterification"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/preparation-of-acyl-acid-chlorides/", "id": "5_4xmCLmtb8", "title": "Preparation of acyl (acid) chlorides", "kind": "Video", "description": "How to prepare acyl (acid) chlorides using thionyl chloride", "slug": "preparation-of-acyl-acid-chlorides"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/preparation-of-acid-anhydrides/", "id": "9K3R6xtO6SU", "title": "Preparation of acid anhydrides", "kind": "Video", "description": "How to prepare acid anhydrides from carboxylic acids", "slug": "preparation-of-acid-anhydrides"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/preparation-of-amides-using-dcc/", "id": "CafRuKs7EfE", "title": "Preparation of amides using DCC", "kind": "Video", "description": "The mechanism for the formation of amides from carboxylic acids and amines using dicyclohexylcarbodiimide (DCC)", "slug": "preparation-of-amides-using-dcc"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/decarboxylation/", "id": "8G0RkfeKfBg", "title": "Decarboxylation", "kind": "Video", "description": "The decarboxylation (loss of carbon dioxide) of malonic acid and a beta-keto acid", "slug": "decarboxylation"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acids/alpha-substitution-of-carboxylic-acids/", "id": "kxS37n0ASqg", "title": "Alpha-substitution of carboxylic acids", "kind": "Video", "description": "How to use the Hell-Volhard-Zelinksy (HVZ) reaction to synthesize alpha-amino acids. By Jay.", "slug": "alpha-substitution-of-carboxylic-acids"}], "in_knowledge_map": false, "description": "5D: Have you ever used vinegar to make succulent barbecue wings? Then carboxylic acids are your friends. Vinegar, also known as acetic acid, is one of the simplest carboxylic acids. You will discover the important nomenclature, properties, and reactions of carboxylic acids in this tutorial.", "node_slug": "carboxylic-acids", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/carboxylic-acids", "extended_slug": "test-prep/mcat/chemical-processes/carboxylic-acids", "kind": "Topic", "slug": "carboxylic-acids"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/", "id": "carboxylic-acid-derivatives", "hide": false, "title": "Carboxylic acid derivatives", "child_data": [{"kind": "Exercise", "id": "x43b26021"}, {"kind": "Video", "id": "x82838180"}, {"kind": "Video", "id": "xa43e7ac2"}, {"kind": "Video", "id": "x17a27dc5"}, {"kind": "Video", "id": "x7b77a874"}, {"kind": "Video", "id": "xca8961e4"}, {"kind": "Video", "id": "xef274335"}, {"kind": "Video", "id": "xc8267955"}, {"kind": "Video", "id": "x510b73fe"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/carboxylic-acid-derivatives-questions/", "id": "carboxylic-acid-derivatives-questions", "title": "Carboxylic acid derivatives questions", "description": "Questions pertaining to carboxylic acid derivatives", "slug": "carboxylic-acid-derivatives-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/nomenclature-and-properties-of-acyl-acid-halides-and-acid-anhydrides/", "id": "uaXgGL1dGfU", "title": "Nomenclature and properties of acyl (acid) halides and acid anhydrides", "kind": "Video", "description": "How to name acyl (acid) chlorides and acid anhydrides and how to analyze their physical properties", "slug": "nomenclature-and-properties-of-acyl-acid-halides-and-acid-anhydrides"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/nomenclature-and-properties-of-esters/", "id": "R9PjfG1e7-w", "title": "Nomenclature and properties of esters", "kind": "Video", "description": "How to name esters and how to analyze their physical properties", "slug": "nomenclature-and-properties-of-esters"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/nomenclature-and-properties-of-amides/", "id": "EgTd7OSTO1I", "title": "Nomenclature and properties of amides", "kind": "Video", "description": "How to name amides and the physical properties of acetamide", "slug": "nomenclature-and-properties-of-amides"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/reactivity-of-carboxylic-acid-derivatives/", "id": "MWii7tL0T84", "title": "Reactivity of carboxylic acid derivatives", "kind": "Video", "description": "How to analyze the reactivity of the carboxylic acid derivatives using induction and resonance effects", "slug": "reactivity-of-carboxylic-acid-derivatives"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/nucleophilic-acyl-substitution/", "id": "3QWJrPq_HB0", "title": "Nucleophilic acyl substitution", "kind": "Video", "description": "The general mechanism of nucleophilic acyl substitution (and leaving group stability)", "slug": "nucleophilic-acyl-substitution"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/acid-catalyzed-ester-hydrolysis/", "id": "K7XAk7EvLSc", "title": "Acid-catalyzed ester hydrolysis", "kind": "Video", "description": "The mechanism for the acid-catalyzed hydrolysis of esters (and transesterification)", "slug": "acid-catalyzed-ester-hydrolysis"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/acid-and-base-catalyzed-hydrolysis-of-amides/", "id": "MGF0jSP3Txo", "title": "Acid and base-catalyzed hydrolysis of amides", "kind": "Video", "description": "The mechanisms for acid and base catalyzed hydrolysis of amides", "slug": "acid-and-base-catalyzed-hydrolysis-of-amides"}, {"path": "khan/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives/beta-lactam-antibiotics/", "id": "I-uzVCJCRpE", "title": "Beta-lactam antibiotics", "kind": "Video", "description": "The mechanism of action of beta-lactam antibiotics", "slug": "beta-lactam-antibiotics"}], "in_knowledge_map": false, "description": "5D: As the name would suggest, carboxylic acid derivatives are quite similar to carboxylic acids in their structure and function. If you\u2019ve ever used soap to wash your hand, you have experienced firsthand (pun intended!) the lavatory effects of an ester, one of the many classes of carboxylic acid derivatives. In this tutorial, we will discuss the important nomenclature, properties, and reactions of carboxylic acids.", "node_slug": "carboxylic-acid-derivatives", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/carboxylic-acid-derivatives", "extended_slug": "test-prep/mcat/chemical-processes/carboxylic-acid-derivatives", "kind": "Topic", "slug": "carboxylic-acid-derivatives"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/enzymes/", "id": "enzymes", "hide": false, "title": "Enzymes", "child_data": [{"kind": "Exercise", "id": "xdcf77620"}, {"kind": "Video", "id": "xcf1aa38a"}, {"kind": "Video", "id": "x8b5ec2a3"}, {"kind": "Video", "id": "x22f8074c"}, {"kind": "Video", "id": "x463bb2f6"}, {"kind": "Video", "id": "xd3a7e1dc"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/enzymes/enzymes-questions/", "id": "enzymes-questions", "title": "Enzymes questions", "description": "Questions pertaining to enzymes", "slug": "enzymes-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/enzymes/an-introduction-to-enzymes-and-catalysis/", "id": "G7ZAwUdBNFE", "title": "Introduction to enzymes and catalysis", "kind": "Video", "description": "Let's explore what enzymes are, and how they can affect a reaction. The most important affect you need to know is its ability to \"catalyze\" the reaction.\u00a0By Ross Firestone.", "slug": "an-introduction-to-enzymes-and-catalysis"}, {"path": "khan/test-prep/mcat/chemical-processes/enzymes/the-induced-fit-model-of-enzyme-catalysis/", "id": "8lUB2sAQkzw", "title": "Induced fit model of enzyme catalysis", "kind": "Video", "description": "Get a better appreciation for how enzymes and substrates bind together. By Ross Firestone.", "slug": "the-induced-fit-model-of-enzyme-catalysis"}, {"path": "khan/test-prep/mcat/chemical-processes/enzymes/the-six-types-of-enzymes/", "id": "AD3-v1oKjSk", "title": "Six types of enzymes", "kind": "Video", "description": "Enzymes are often named for their reactions, and you can often discern the function of an enzyme from its name. We will learn about six types of enzymes based on the type of reaction they catalyze.\u00a0By Ross Firestone.", "slug": "the-six-types-of-enzymes"}, {"path": "khan/test-prep/mcat/chemical-processes/enzymes/an-introduction-to-enzyme-kinetics/", "id": "X_YXTWU2maY", "title": "An introduction to enzyme kinetics", "kind": "Video", "slug": "an-introduction-to-enzyme-kinetics"}, {"path": "khan/test-prep/mcat/chemical-processes/enzymes/allosteric-regulation-and-feedback-loops/", "id": "UWrJssS76XE", "title": "Allosteric regulation and feedback loops", "kind": "Video", "slug": "allosteric-regulation-and-feedback-loops"}], "in_knowledge_map": false, "description": "5D - The multitude of reactions within our cells are sped up by enzymes. Without these biomolecules, these biochemical pathways would be as slow as a turtle. For instance, without enzymes, your body may never be able to break down and absorb the hamburger you just had for lunch. The hamburger would simply sit there, a lump in your stomach, until reactions slowly started to happen on their own - enzymes speed that up!", "node_slug": "enzymes", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/enzymes", "extended_slug": "test-prep/mcat/chemical-processes/enzymes", "kind": "Topic", "slug": "enzymes"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/kinetics/", "id": "kinetics", "hide": false, "title": "Kinetics", "child_data": [{"kind": "Exercise", "id": "x7133db8a"}, {"kind": "Video", "id": "x3d400008"}, {"kind": "Video", "id": "xba36c390"}, {"kind": "Video", "id": "xa3c0f3cf"}, {"kind": "Video", "id": "x6e4aa8e2"}, {"kind": "Video", "id": "x2fe55283"}, {"kind": "Video", "id": "xfce7e24d"}, {"kind": "Video", "id": "xc6f74be3"}, {"kind": "Video", "id": "xf66a9476"}, {"kind": "Video", "id": "xde3bccae"}, {"kind": "Video", "id": "x1d7ae02d"}, {"kind": "Video", "id": "x2a1eac00"}, {"kind": "Video", "id": "xa0344f0e"}, {"kind": "Video", "id": "x192cb86f"}, {"kind": "Video", "id": "x81933fd6"}, {"kind": "Video", "id": "x71322e6f"}, {"kind": "Video", "id": "x260a2638"}, {"kind": "Video", "id": "xde3ff69d"}, {"kind": "Video", "id": "x3f370583"}, {"kind": "Video", "id": "x3d4766d5"}, {"kind": "Video", "id": "xaf94b7bc"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/kinetics/kinetics-questions/", "id": "kinetics-questions", "title": "Kinetics questions", "description": "Questions pertaining to kinetics", "slug": "kinetics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/rate-of-reaction/", "id": "8wIodo1HD4Y", "title": "Rate of reaction", "kind": "Video", "description": "Definition of reaction rate, and examples of calculating the average rate of reaction.", "slug": "rate-of-reaction"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/rate-law-and-reaction-order/", "id": "6Ng8ayarWHw", "title": "Rate law and reaction order", "kind": "Video", "description": "Using method of initial rates to determine the order of a reaction.", "slug": "rate-law-and-reaction-order"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/experimental-determination-of-rate-laws/", "id": "Ad0aaYixFJg", "title": "Experimental determination of rate laws", "kind": "Video", "description": "Example using initial rates to find the order in each reactant, the overall order, and the rate constant k.", "slug": "experimental-determination-of-rate-laws"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/first-order-reaction-with-calculus/", "id": "Bt0mz4mGddk", "title": "First-order reaction (with calculus)", "kind": "Video", "description": "Deriving the integrated rate law for first-order reactions using calculus. How you can graph first-order rate data to see a linear relationship.", "slug": "first-order-reaction-with-calculus"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/plotting-data-for-a-first-order-reaction/", "id": "vN7O7zsRKb8", "title": "Plotting data for a first-order reaction", "kind": "Video", "description": "Example of graphing first-order rate data to see a linear relationship, and calculating rate constant k from the slope.", "slug": "plotting-data-for-a-first-order-reaction"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/half-life-of-a-first-order-reaction/", "id": "e4qci9b2d3U", "title": "Half-life of a first-order reaction", "kind": "Video", "description": "Deriving half-life equation of a first-order reaction starting from the integrated rate law.", "slug": "half-life-of-a-first-order-reaction"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/plotting-data-for-a-second-order-reaction/", "id": "eajQ4ZY2r-U", "title": "Plotting data for a second-order reaction", "kind": "Video", "description": "Example of graphing second order rate data to see a linear relationship, and calculating rate constant k from the slope.", "slug": "plotting-data-for-a-second-order-reaction"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/first-order-reaction-example/", "id": "fCdT2z0JcU8", "title": "First-order reaction example", "kind": "Video", "description": "Example of using the integrated rate law to solve for time and concentration, and calculating the half life for a first-order reaction.", "slug": "first-order-reaction-example"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/second-order-reaction-with-calculus/", "id": "BRVPlDCMgMg", "title": "Second-order reaction (with calculus)", "kind": "Video", "description": "Deriving the integrated rate law for second order reactions using calculus. How you can graph second order rate data to see a linear relationship.", "slug": "second-order-reaction-with-calculus"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/half-life-of-a-second-order-reaction/", "id": "XUmB0reCB-U", "title": "Half-life of a second-order reaction", "kind": "Video", "description": "Deriving half-life equation of a second-order reaction starting from the integrated rate law.", "slug": "half-life-of-a-second-order-reaction"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/second-order-reaction-example/", "id": "OmWyMLucEbE", "title": "Second-order reaction example", "kind": "Video", "description": "Example of using integrated rate law to solve for concentration, and calculating the half life for a second-order reaction.", "slug": "second-order-reaction-example"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/zero-order-reaction-with-calculus/", "id": "49LcF9Zf9TI", "title": "Zero-order reaction (with calculus)", "kind": "Video", "description": "Deriving the integrated rate law for zeroth order reactions using calculus. How you can graph zero order rate data to see a linear relationship.", "slug": "zero-order-reaction-with-calculus"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/collision-theory/", "id": "1iAxhc6EflI", "title": "Collision theory", "kind": "Video", "description": "An introduction to collision theory and activation energy.", "slug": "collision-theory"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/arrhenius-equation/", "id": "zjhepBLtqug", "title": "Arrhenius equation", "kind": "Video", "slug": "arrhenius-equation"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/forms-of-the-arrhenius-equation/", "id": "J0ndBMMQW20", "title": "Forms of the Arrhenius equation", "kind": "Video", "description": "How to write different forms of the Arrhenius equation. Using the Arrhenius equation to look at how changing temperature and activation energy affects collisions.", "slug": "forms-of-the-arrhenius-equation"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/using-the-arrhenius-equation/", "id": "aIvYdSzLGoI", "title": "Using the Arrhenius equation", "kind": "Video", "description": "How to use the Arrhenius equation to calculate the activation energy.", "slug": "using-the-arrhenius-equation"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/elementary-rate-laws/", "id": "vIZ0LnLo3jE", "title": "Elementary rate laws", "kind": "Video", "description": "How to write rate laws for elementary reactions.", "slug": "elementary-rate-laws"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/mechanisms-and-the-rate-determining-step/", "id": "ShzW1LoQgoc", "title": "Mechanisms and the rate-determining step", "kind": "Video", "description": "An introduction to mechanisms and the rate determining step. Example of finding rate law of multistep reaction with initial slow step.", "slug": "mechanisms-and-the-rate-determining-step"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/catalysts/", "id": "if5JGssffm8", "title": "Catalysts", "kind": "Video", "description": "How a catalyst speeds up a reaction by lowering the activation energy.", "slug": "catalysts"}, {"path": "khan/test-prep/mcat/chemical-processes/kinetics/kinetic-and-thermodynamic-enolates/", "id": "sBuM8hTGlag", "title": "Kinetic and thermodynamic enolates", "kind": "Video", "description": "How to form different enolates from ketones", "slug": "kinetic-and-thermodynamic-enolates"}], "in_knowledge_map": false, "description": "Chemical reactions are like an assembly line. The right parts have to come together at the right time in order to make the right product. How fast this can occur depends on the slowest step of the process. These videos show how and why different reactions occur at different speeds, and how catalysts - like enzymes in the body - can make reactions happen faster.", "node_slug": "kinetics", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/kinetics", "extended_slug": "test-prep/mcat/chemical-processes/kinetics", "kind": "Topic", "slug": "kinetics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/equilibrium-mcat/", "id": "equilibrium-mcat", "hide": false, "title": "Equilibrium", "child_data": [{"kind": "Exercise", "id": "x1489caca"}, {"kind": "Video", "id": "429004"}, {"kind": "Video", "id": "388057"}, {"kind": "Video", "id": "xbd98aaa4"}, {"kind": "Video", "id": "x7345ecd1"}, {"kind": "Video", "id": "x0c9df053"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/equilibrium-mcat/equilibrium-questions/", "id": "equilibrium-questions", "title": "Equilibrium questions", "description": "Questions pertaining to equilibrium", "slug": "equilibrium-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/equilibrium-mcat/reactions-in-equilibrium/", "id": "CGJjjm7-DJ4", "title": "Reactions in equilibrium", "kind": "Video", "description": "Equilibrium reactions and constants.", "slug": "reactions-in-equilibrium"}, {"path": "khan/test-prep/mcat/chemical-processes/equilibrium-mcat/le-chatelier-s-principle/", "id": "4-fEvpVNTlE", "title": "Le Chatelier's principle", "kind": "Video", "description": "Le Chatelier's Principle regarding the \"stressing\" of reactions in equilibrium", "slug": "le-chatelier-s-principle"}, {"path": "khan/test-prep/mcat/chemical-processes/equilibrium-mcat/changes-in-free-energy-and-the-reaction-quotient/", "id": "tB4lr5Qh3DI", "title": "Changes in free energy and the reaction quotient", "kind": "Video", "description": "The relationship between Gibbs free energy, standard Gibbs free energy, and the reaction quotient Q. Predicting the direction of the reaction when we don't have standard conditions.", "slug": "changes-in-free-energy-and-the-reaction-quotient"}, {"path": "khan/test-prep/mcat/chemical-processes/equilibrium-mcat/standard-change-in-free-energy-and-the-equilibrium-constant/", "id": "U5-3wnY04gU", "title": "Standard change in free energy and the equilibrium constant", "kind": "Video", "description": "The relationship between standard Gibbs free energy change and the equilibrium constant K. Calculating K when you know the standard free energy of reaction.", "slug": "standard-change-in-free-energy-and-the-equilibrium-constant"}, {"path": "khan/test-prep/mcat/chemical-processes/equilibrium-mcat/galvanic-cells-and-changes-in-free-energy/", "id": "TYFAJHx5LFA", "title": "Galvanic cells and changes in free energy", "kind": "Video", "description": "Relationship between Gibbs free energy, reaction quotient Q, and cell voltage.", "slug": "galvanic-cells-and-changes-in-free-energy"}], "in_knowledge_map": false, "description": "The bane of the pharmaceutical industry is that reactions don\u2019t go from 100% reactants to 100% products. They end in equilibrium with each other. Learn how to calculate equilibrium constants and push reactions further towards products by watching these videos!", "node_slug": "equilibrium-mcat", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/equilibrium-mcat", "extended_slug": "test-prep/mcat/chemical-processes/equilibrium-mcat", "kind": "Topic", "slug": "equilibrium-mcat"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/bioenergetics/", "id": "bioenergetics", "hide": false, "title": "Bioenergetics", "child_data": [{"kind": "Exercise", "id": "xaeb783a3"}, {"kind": "Exercise", "id": "x7a46fb33"}, {"kind": "Video", "id": "x34d1968c"}, {"kind": "Video", "id": "x6eeebe75"}, {"kind": "Video", "id": "xb1e47c02"}, {"kind": "Video", "id": "x0d3463ae"}, {"kind": "Video", "id": "x7eb846b2"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/bioenergetics/principles-of-bioenergetics-questions/", "id": "principles-of-bioenergetics-questions", "title": "Bioenergetics questions", "description": "Questions related to bioenergetics", "slug": "principles-of-bioenergetics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/bioenergetics/bioenergetics-questions/", "id": "bioenergetics-questions", "title": "Bioenergetics questions (2)", "description": "Bioenergetics questions", "slug": "bioenergetics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/bioenergetics/gibbs-free-energy-an-analogy/", "id": "qTXZ6UrO54U", "title": "An analogy for Gibbs free energy", "kind": "Video", "slug": "gibbs-free-energy-an-analogy"}, {"path": "khan/test-prep/mcat/chemical-processes/bioenergetics/bioenergetics-the-transformation-of-free-energy-in-living-systems/", "id": "P2WD9jFePwo", "title": "Bioenergetics: The transformation of free energy in living systems", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "bioenergetics-the-transformation-of-free-energy-in-living-systems"}, {"path": "khan/test-prep/mcat/chemical-processes/bioenergetics/why-we-need-metabolism/", "id": "CPB7C36zyjM", "title": "Why we need metabolism?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "why-we-need-metabolism"}, {"path": "khan/test-prep/mcat/chemical-processes/bioenergetics/insulin-and-glucagon/", "id": "Id2E72P8Fe0", "title": "Insulin and glucagon", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "insulin-and-glucagon"}, {"path": "khan/test-prep/mcat/chemical-processes/bioenergetics/tissue-specific-metabolism-and-the-metabolic-states/", "id": "l_e1jq_I3sY", "title": "Tissue specific metabolism and the metabolic states", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "tissue-specific-metabolism-and-the-metabolic-states"}], "in_knowledge_map": false, "description": "", "node_slug": "bioenergetics", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/bioenergetics", "extended_slug": "test-prep/mcat/chemical-processes/bioenergetics", "kind": "Topic", "slug": "bioenergetics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/", "id": "thermodynamics-mcat", "hide": false, "title": "Thermodynamics", "child_data": [{"kind": "Exercise", "id": "xf03ab653"}, {"kind": "Article", "id": "xc7c3aad9"}, {"kind": "Video", "id": "xf8a20837"}, {"kind": "Video", "id": "x5c11e165"}, {"kind": "Video", "id": "xcae8d5fc"}, {"kind": "Video", "id": "x9552a749"}, {"kind": "Video", "id": "xa78c7d17"}, {"kind": "Video", "id": "x3fea420f"}, {"kind": "Video", "id": "x04af081f"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/thermodynamics-questions/", "id": "thermodynamics-questions", "title": "Thermodynamics questions", "description": "Questions pertaining to thermodynamics", "slug": "thermodynamics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/specific-heat-and-latent-leat-of-fusion-and-vaporization-2/", "id": "WU7TfO-iaK8", "title": "Specific heat and latent leat of fusion and vaporization", "kind": "Video", "description": "Defining specific heat, heat of fusion, and heat of vaporization. How to calculate the amount of heat to change the temperature of water and the energy required to change for a phase change.", "slug": "specific-heat-and-latent-leat-of-fusion-and-vaporization-2"}, {"path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/zeroth-law-of-thermodynamics/", "id": "j-enxYaQMdA", "title": "Zeroth law of thermodynamics", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "zeroth-law-of-thermodynamics"}, {"path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/first-law-of-thermodynamics/", "id": "u4-HYwo0Gsc", "title": "First law of thermodynamics", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "first-law-of-thermodynamics"}, {"path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/first-law-of-thermodynamics-problem-solving/", "id": "6sP3kV-zgZk", "title": "First law of thermodynamics problem solving", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "first-law-of-thermodynamics-problem-solving"}, {"path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/pv-diagrams-part-1-work-and-isobaric-processes/", "id": "Xcrco59p40o", "title": "PV diagrams - part 1: Work and isobaric processes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pv-diagrams-part-1-work-and-isobaric-processes"}, {"path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/pv-diagrams-part-2-isothermal-isometric-adiabatic-processes/", "id": "nkOtOMNS5bQ", "title": "PV diagrams - part 2: Isothermal, isometric, adiabatic processes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pv-diagrams-part-2-isothermal-isometric-adiabatic-processes"}, {"path": "khan/test-prep/mcat/chemical-processes/thermodynamics-mcat/second-law-of-thermodynamics/", "id": "Iwmb1p25ws4", "title": "Second law of thermodynamics", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "second-law-of-thermodynamics"}], "in_knowledge_map": false, "description": "When a gas gets heated it expands, and this expansion can be used to do work like moving a piston in an combustion engine. These videos cover related topics such as isothermal, isometric, and diabatic processes as well as the laws of thermodynamics.", "node_slug": "thermodynamics-mcat", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/thermodynamics-mcat", "extended_slug": "test-prep/mcat/chemical-processes/thermodynamics-mcat", "kind": "Topic", "slug": "thermodynamics-mcat"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/chemical-processes/thermochemistry/", "id": "thermochemistry", "hide": false, "title": "Thermochemistry", "child_data": [{"kind": "Exercise", "id": "x68da310f"}, {"kind": "Video", "id": "373049"}, {"kind": "Video", "id": "403032"}, {"kind": "Video", "id": "414006"}, {"kind": "Video", "id": "412026"}, {"kind": "Video", "id": "410037"}, {"kind": "Video", "id": "368056"}, {"kind": "Video", "id": "389055"}, {"kind": "Video", "id": "427003"}, {"kind": "Article", "id": "x705ce088"}], "children": [{"path": "khan/test-prep/mcat/chemical-processes/thermochemistry/thermochemistry-questions/", "id": "thermochemistry-questions", "title": "Thermochemistry questions", "description": "Questions pertaining to Thermochemistry", "slug": "thermochemistry-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/chemical-processes/thermochemistry/phase-diagrams/", "id": "Qp87Z4m8R-w", "title": "Phase diagrams", "kind": "Video", "description": "Understanding and interpreting phase diagrams", "slug": "phase-diagrams"}, {"path": "khan/test-prep/mcat/chemical-processes/thermochemistry/enthalpy/", "id": "fucyI7Ouj2c", "title": "Enthalpy", "kind": "Video", "description": "Understanding why enthalpy can be viewed as \"heat content\" in a constant pressure system.", "slug": "enthalpy"}, {"path": "khan/test-prep/mcat/chemical-processes/thermochemistry/heat-of-formation/", "id": "PK_JXzYcme0", "title": "Heat of formation", "kind": "Video", "description": "Standard heat of formation or standard enthalpy change of formation.", "slug": "heat-of-formation"}, {"path": "khan/test-prep/mcat/chemical-processes/thermochemistry/hess-s-law-and-reaction-enthalpy-change/", "id": "chXMpDwjBDk", "title": "Hess's law and reaction enthalpy change", "kind": "Video", "description": "Using Hess's Law and standard heats of formation to determine the enthalpy change for reactions", "slug": "hess-s-law-and-reaction-enthalpy-change"}, {"path": "khan/test-prep/mcat/chemical-processes/thermochemistry/gibbs-free-energy-and-spontaneity/", "id": "ViAmQivKif0", "title": "Gibbs free energy and spontaneity", "kind": "Video", "description": "Intuition behind why spontaneity is driven by enthalpy, entropy and temperature. Introduction to Gibbs free energy.", "slug": "gibbs-free-energy-and-spontaneity"}, {"path": "khan/test-prep/mcat/chemical-processes/thermochemistry/gibbs-free-energy-example/", "id": "sG1ZAdYi13A", "title": "Gibbs free energy example", "kind": "Video", "description": "Determining if a reaction is spontaneous by calculating the change in Gibbs free energy. Also calculates the change in entropy using table of standard entropies.", "slug": "gibbs-free-energy-example"}, {"path": "khan/test-prep/mcat/chemical-processes/thermochemistry/more-rigorous-gibbs-free-energy-spontaneity-relationship/", "id": "7aur5h44pV4", "title": "More rigorous Gibbs free energy / spontaneity relationship", "kind": "Video", "description": "More formal understanding of why a negative change in Gibbs Free Energy implies a spontaneous, irreversible reaction.", "slug": "more-rigorous-gibbs-free-energy-spontaneity-relationship"}, {"path": "khan/test-prep/mcat/chemical-processes/thermochemistry/a-look-at-a-seductive-but-wrong-gibbs-spontaneity-proof/", "id": "yYbzJs6vgv8", "title": "A look at a seductive but wrong Gibbs/spontaneity proof", "kind": "Video", "description": "A look at why the \"proof\" of the relation between changes in Gibbs Free Energy and Spontaneity is wrong in many textbooks.", "slug": "a-look-at-a-seductive-but-wrong-gibbs-spontaneity-proof"}], "in_knowledge_map": false, "description": "Wouldn\u2019t it be terrifying if our clothes, food, and houses spontaneously combusted? Molecular bonds store tremendous amounts of energy, but generally are very stable. In order to release the energy, you have to add more first - like applying a match to a firework. These videos will overview standard enthalpy, entropy, and how to find out if a reaction is spontaneous.", "node_slug": "thermochemistry", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/chemical-processes/thermochemistry", "extended_slug": "test-prep/mcat/chemical-processes/thermochemistry", "kind": "Topic", "slug": "thermochemistry"}], "in_knowledge_map": false, "description": "Foundational Concept 5: The principles that govern chemical interactions and reactions form the basis for a broader understanding of the molecular dynamics of living systems.", "node_slug": "chemical-processes", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/chemical-processes", "extended_slug": "test-prep/mcat/chemical-processes", "kind": "Topic", "slug": "chemical-processes"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/", "id": "processing-the-environment", "hide": false, "title": "Processing the environment", "child_data": [{"kind": "Topic", "id": "xa6576ec7"}, {"kind": "Topic", "id": "x5ba0c972"}, {"kind": "Topic", "id": "xc71665a5"}, {"kind": "Topic", "id": "xdfac923f"}, {"kind": "Topic", "id": "x83330a88"}, {"kind": "Topic", "id": "x041789f8"}, {"kind": "Topic", "id": "x5b98306b"}, {"kind": "Topic", "id": "xd1b1603d"}, {"kind": "Topic", "id": "x85fa5325"}, {"kind": "Topic", "id": "x85ef4750"}, {"kind": "Topic", "id": "x7e5ebf91"}, {"kind": "Topic", "id": "xdde94d6d"}, {"kind": "Topic", "id": "xf1d7f711"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/", "id": "sensory-perception", "hide": false, "title": "Sensory perception", "child_data": [{"kind": "Exercise", "id": "x37343f27"}, {"kind": "Video", "id": "x5a99dfd1"}, {"kind": "Video", "id": "x6e5730e4"}, {"kind": "Video", "id": "x514724cb"}, {"kind": "Video", "id": "x05a57f29"}, {"kind": "Video", "id": "xe595adb5"}, {"kind": "Video", "id": "x55a3648e"}, {"kind": "Video", "id": "x7dcb9bac"}, {"kind": "Video", "id": "x5029ccec"}, {"kind": "Video", "id": "x69d7084f"}, {"kind": "Video", "id": "x1d7a1b97"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/sensory-perception-questions/", "id": "sensory-perception-questions", "title": "Sensory perception questions", "slug": "sensory-perception-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/perceptual-organization/", "id": "PQyQadCqLAI", "title": "Visual cues", "kind": "Video", "slug": "perceptual-organization"}, {"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/sensory-adapting/", "id": "8shz0KfqkMo", "title": "Sensory adaptation", "kind": "Video", "slug": "sensory-adapting"}, {"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/webers-law-and-thresholds/", "id": "O_nY1TM2RZM", "title": "Weber's law and thresholds", "kind": "Video", "slug": "webers-law-and-thresholds"}, {"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/absolute-threshold-of-sensation/", "id": "0jK5x_hsTvY", "title": "Absolute threshold of sensation", "kind": "Video", "slug": "absolute-threshold-of-sensation"}, {"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/somatosensation-1/", "id": "FssCS9RhFt0", "title": "Somatosensation", "kind": "Video", "description": "Explore our ability to sense the environment through our body. \u00a0By Ron.", "slug": "somatosensation-1"}, {"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/the-vestibular-system-balance-and-dizziness/", "id": "1AZnFszUroI", "title": "The vestibular system, balance, and dizziness", "kind": "Video", "slug": "the-vestibular-system-balance-and-dizziness"}, {"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/signal-detection-theory-part-1/", "id": "BHkw9_GWPJA", "title": "Signal detection theory - part 1", "kind": "Video", "slug": "signal-detection-theory-part-1"}, {"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/signal-detection-theory-part-2/", "id": "UHEiWws8t-g", "title": "Signal detection theory - part 2", "kind": "Video", "slug": "signal-detection-theory-part-2"}, {"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/bottom-up-versus-top-down-processing/", "id": "aJy5_p_LAhQ", "title": "Bottom-up vs. top-down processing", "kind": "Video", "slug": "bottom-up-versus-top-down-processing"}, {"path": "khan/test-prep/mcat/processing-the-environment/sensory-perception/gestalt-principles/", "id": "20N53khArXA", "title": "Gestalt principles", "kind": "Video", "slug": "gestalt-principles"}], "in_knowledge_map": false, "description": "6A: Each day, we encounter various sights, sounds, smells, and tastes. Without an integrative centers, these many inputs would mean nothing to us. We will learn about how we perceive our various senses, including the theories, laws, and organizational principles that underly our ability to make sense of the world around us.", "node_slug": "sensory-perception", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/sensory-perception", "extended_slug": "test-prep/mcat/processing-the-environment/sensory-perception", "kind": "Topic", "slug": "sensory-perception"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/sight/", "id": "sight", "hide": false, "title": "Sight (vision)", "child_data": [{"kind": "Exercise", "id": "x924a2675"}, {"kind": "Video", "id": "x59ee3a84"}, {"kind": "Video", "id": "x9ad8d29e"}, {"kind": "Video", "id": "x37026cd3"}, {"kind": "Video", "id": "x0e9ec663"}, {"kind": "Video", "id": "x198511a9"}, {"kind": "Video", "id": "x9cf82bf8"}, {"kind": "Video", "id": "xf27124b4"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/sight/sight-questions/", "id": "sight-questions", "title": "Sight questions", "description": "Questions pertaining to sight", "slug": "sight-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/sight/vision-structure-of-the-eye/", "id": "nXgL7C7emDQ", "title": "The structure of the eye", "kind": "Video", "description": "In this video, I review the structure of the eye. By Ronald Sahyouni.", "slug": "vision-structure-of-the-eye"}, {"path": "khan/test-prep/mcat/processing-the-environment/sight/vision-summary/", "id": "3m-464MqBJY", "title": "Visual sensory information", "kind": "Video", "description": "In this video, I explore our sense of vision. By Ronald Sahyouni.", "slug": "vision-summary"}, {"path": "khan/test-prep/mcat/processing-the-environment/sight/phototransduction-cascade/", "id": "CqN-XIPhMpo", "title": "The phototransduction cascade", "kind": "Video", "description": "This explains phototransduction cascade which is critical to our sense of vision. By Ronald Sahyouni.", "slug": "phototransduction-cascade"}, {"path": "khan/test-prep/mcat/processing-the-environment/sight/photoreceptors-rods-cones/", "id": "_ElAuQyw4uA", "title": "Photoreceptors (rods vs cones)", "kind": "Video", "description": "In this video, I explore the similarities and differences between rods and cones. By Ronald Sahyouni.", "slug": "photoreceptors-rods-cones"}, {"path": "khan/test-prep/mcat/processing-the-environment/sight/photoreceptor-distribution-fovea/", "id": "UXIfzc1UH-g", "title": "Photoreceptor distribution in the fovea", "kind": "Video", "description": "In this video, I explore how photoreceptors (rods and cones) are distributed in the fovea. By Ronald Sahyouni.", "slug": "photoreceptor-distribution-fovea"}, {"path": "khan/test-prep/mcat/processing-the-environment/sight/visual-field-processing/", "id": "aobWzlXIooQ", "title": "Visual field processing", "kind": "Video", "description": "In this video, I review how we process our visual field, and how information from the right and left visual field is broken down and sent to the brain. By Ronald Sahyouni.", "slug": "visual-field-processing"}, {"path": "khan/test-prep/mcat/processing-the-environment/sight/feature-detection-and-parallel-processing/", "id": "0ugcw7wOZBg", "title": "Feature detection and parallel processing", "kind": "Video", "description": "In this video, I review our ability to break down an image into its component \"features\" such as color, form, and motion. This is known as feature detection, and since the detection of various features happens simultaneously, or in parallel, it is referred to as parallel processing.\u00a0 By Ronald Sahyouni.", "slug": "feature-detection-and-parallel-processing"}], "in_knowledge_map": false, "description": "6A: Red, orange, yellow, green, blue. These words would have no meaning to you were it not for your properly functioning visual sensation. You are able to read this webpage because there are multitudinous synapses between the neurons in your eye, which detect light, and the neurons in the occipital lobe of your brain, which process this same image. We will break down how our eyes and brain are able to process the splendid world around us as photons bombard us from all around.", "node_slug": "sight", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/sight", "extended_slug": "test-prep/mcat/processing-the-environment/sight", "kind": "Topic", "slug": "sight"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/sound-audition/", "id": "sound-audition", "hide": false, "title": "Sound (Audition)", "child_data": [{"kind": "Exercise", "id": "x7b1c078e"}, {"kind": "Video", "id": "xbb654a81"}, {"kind": "Video", "id": "x15ccf217"}, {"kind": "Video", "id": "xb6768f51"}, {"kind": "Video", "id": "x86e1d006"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/sound-audition/sound-questions/", "id": "sound-questions", "title": "Sound questions", "description": "Questions pertaining to sound", "slug": "sound-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/sound-audition/auditory-structure-part-1/", "id": "6GB_kcdVMQo", "title": "Auditory structure - part 1", "kind": "Video", "slug": "auditory-structure-part-1"}, {"path": "khan/test-prep/mcat/processing-the-environment/sound-audition/auditory-structure-part-2/", "id": "B2vtvtqZwwQ", "title": "Auditory structure - part 2", "kind": "Video", "slug": "auditory-structure-part-2"}, {"path": "khan/test-prep/mcat/processing-the-environment/sound-audition/auditory-processing-video/", "id": "peSLM4XObBE", "title": "Auditory processing", "kind": "Video", "slug": "auditory-processing-video"}, {"path": "khan/test-prep/mcat/processing-the-environment/sound-audition/cochlear-implant/", "id": "jhjoGx6eGXs", "title": "Cochlear implants", "kind": "Video", "slug": "cochlear-implant"}], "in_knowledge_map": false, "description": "6A: Listen carefully - that\u2019s the sound of fingers on a keyboard. Why does it sound different from the sound of nails on a chalkboard? And why might your grandfather have difficulty hearing that faint noise whereas you have difficulty zoning it out? In this module, you will learn about how we hear, including the structure of the outer, middle, and inner ear, as well as the basics of auditory processing and cochlear implants.", "node_slug": "sound-audition", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/sound-audition", "extended_slug": "test-prep/mcat/processing-the-environment/sound-audition", "kind": "Topic", "slug": "sound-audition"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/somatosensation/", "id": "somatosensation", "hide": false, "title": "Somatosensation", "child_data": [{"kind": "Exercise", "id": "xfd03d2ce"}, {"kind": "Video", "id": "xe595adb5"}, {"kind": "Video", "id": "x74c4a46e"}, {"kind": "Video", "id": "x7aa5781a"}, {"kind": "Video", "id": "x450f7a79"}, {"kind": "Video", "id": "x7f17449b"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/somatosensation/somatosensation-questions/", "id": "somatosensation-questions", "title": "Somatosensation Questions", "description": "Questions pertaining to Somatosensation", "slug": "somatosensation-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/somatosensation/somatosensation-1/", "id": "FssCS9RhFt0", "title": "Somatosensation", "kind": "Video", "description": "Explore our ability to sense the environment through our body. \u00a0By Ron.", "slug": "somatosensation-1"}, {"path": "khan/test-prep/mcat/processing-the-environment/somatosensation/sensory-adaptation-and-amplification/", "id": "JC_TVyAMYE0", "title": "Sensory adaptation and amplification", "kind": "Video", "description": "Sensory adaptation and amplification are discussed in this video to differentiate the two.\u00a0 By Ronald Sahyouni.", "slug": "sensory-adaptation-and-amplification"}, {"path": "khan/test-prep/mcat/processing-the-environment/somatosensation/somatosensory-homunculus/", "id": "3jf2l9ma6SM", "title": "Somatosensory homunculus", "kind": "Video", "description": "In this video, I review the somatosensory homunculus, which is basically a \"topological\" representation of the body in the brain.\u00a0 By Ronald Sahyouni.", "slug": "somatosensory-homunculus"}, {"path": "khan/test-prep/mcat/processing-the-environment/somatosensation/proprioception-kinesthesia/", "id": "yKfpBGicqNQ", "title": "Proprioception and kinesthesia", "kind": "Video", "description": "The differences between propioception (sense of body position) and kinesthesia (sense of body movement) are discussed.\u00a0 By Ronald Sahyouni.", "slug": "proprioception-kinesthesia"}, {"path": "khan/test-prep/mcat/processing-the-environment/somatosensation/pain-and-temperature-1/", "id": "D-oAsFIHqbY", "title": "Pain and temperature", "kind": "Video", "description": "Explore our senses of pain & temperature. \u00a0By Ron.", "slug": "pain-and-temperature-1"}], "in_knowledge_map": false, "description": "6A: When you hold a glass of water, your brain perceives senses many bits of information about the glass - its temperature, its size, and its location in space. We perceive the environment through our bodily senses, including our sensation of pain, temperature, pressure, balance, and movement. In this module you will discover how our body gathers this information and processes it so that we can make sense of the colorfu lworld around us.", "node_slug": "somatosensation", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/somatosensation", "extended_slug": "test-prep/mcat/processing-the-environment/somatosensation", "kind": "Topic", "slug": "somatosensation"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/taste-gustation-and-smell-olfaction/", "id": "taste-gustation-and-smell-olfaction", "hide": false, "title": "Taste (gustation) and smell (olfaction)", "child_data": [{"kind": "Exercise", "id": "x42718049"}, {"kind": "Video", "id": "xc9ce0355"}, {"kind": "Video", "id": "xf043d41e"}, {"kind": "Video", "id": "xe6c1796a"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/taste-gustation-and-smell-olfaction/taste-and-smell-quiz/", "id": "taste-and-smell-quiz", "title": "Taste and smell questions", "description": "Questions pertaining to taste and smell", "slug": "taste-and-smell-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/taste-gustation-and-smell-olfaction/pheromones/", "id": "EO4_vu9IuNk", "title": "Pheromones", "kind": "Video", "slug": "pheromones"}, {"path": "khan/test-prep/mcat/processing-the-environment/taste-gustation-and-smell-olfaction/olfaction-structure-and-function/", "id": "5-McqAO8_Qw", "title": "Olfaction - structure and function", "kind": "Video", "slug": "olfaction-structure-and-function"}, {"path": "khan/test-prep/mcat/processing-the-environment/taste-gustation-and-smell-olfaction/gustation-structure-and-function/", "id": "-vp1X7_u3KU", "title": "Gustation - structure and function", "kind": "Video", "slug": "gustation-structure-and-function"}], "in_knowledge_map": false, "description": "6A: Have you ever had difficulty tasting your favorite food when you had a stuffy nose? That\u2019s because the senses of olfaction (smell) and gustation (taste) are intertwined. We will learn about the anatomy and physiology of these sensory systems as we explore their underlying molecular basis.", "node_slug": "taste-gustation-and-smell-olfaction", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/taste-gustation-and-smell-olfaction", "extended_slug": "test-prep/mcat/processing-the-environment/taste-gustation-and-smell-olfaction", "kind": "Topic", "slug": "taste-gustation-and-smell-olfaction"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/", "id": "sleep-and-consciousness", "hide": false, "title": "Sleep and consciousness", "child_data": [{"kind": "Exercise", "id": "x9e27d2d7"}, {"kind": "Video", "id": "xcc9a7a57"}, {"kind": "Video", "id": "x24b32aa0"}, {"kind": "Video", "id": "x4ad34281"}, {"kind": "Video", "id": "x5526efc2"}, {"kind": "Video", "id": "xd109a8fb"}, {"kind": "Video", "id": "x59f8196d"}, {"kind": "Video", "id": "x2ddfbb8a"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/consciousness-and-sleep-questions/", "id": "consciousness-and-sleep-questions", "title": "Consciousness and sleep questions", "description": "Questions pertaining to consciousness and sleep", "slug": "consciousness-and-sleep-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/sleep-and-consciousness/", "id": "WFnyLmL9t2I", "title": "States of consciousness", "kind": "Video", "slug": "sleep-and-consciousness"}, {"path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/sleep-stages-and-circadian-rhythms/", "id": "fNlp0UMqUtM", "title": "Sleep stages and circadian rhythms", "kind": "Video", "slug": "sleep-stages-and-circadian-rhythms"}, {"path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/dreaming/", "id": "TGwXMpWvcYU", "title": "Dreaming", "kind": "Video", "slug": "dreaming"}, {"path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/dream-theories-freud-activation-synthnesis-hypothesis/", "id": "UAXapQvZe2w", "title": "Dream theories Freud, activation synthesis hypothesis", "kind": "Video", "slug": "dream-theories-freud-activation-synthnesis-hypothesis"}, {"path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/sleep-disorders/", "id": "VBcEz8bVbL0", "title": "Sleep disorders", "kind": "Video", "slug": "sleep-disorders"}, {"path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/sleep-wake-disorders-breathing-related-sleep-disorders/", "id": "_w9AwycMm2g", "title": "Breathing related sleep disorders", "kind": "Video", "slug": "sleep-wake-disorders-breathing-related-sleep-disorders"}, {"path": "khan/test-prep/mcat/processing-the-environment/sleep-and-consciousness/hypnosis-and-meditation/", "id": "Gv_1viYhEoU", "title": "Hypnosis and meditation", "kind": "Video", "slug": "hypnosis-and-meditation"}], "in_knowledge_map": false, "description": "6B: One third of our lives is consumed by the mysterious process called \u201csleep.\u201d There is a lot we don\u2019t know about sleep, but we will discuss what we do understand in this module. You will find why napping for a twenty minutes in the afternoon may not be such a bad idea as you explore states of consciousness, circadian rhythms, sleep stages, and sleep disorders.", "node_slug": "sleep-and-consciousness", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/sleep-and-consciousness", "extended_slug": "test-prep/mcat/processing-the-environment/sleep-and-consciousness", "kind": "Topic", "slug": "sleep-and-consciousness"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/", "id": "drug-dependence", "hide": false, "title": "Drug dependence", "child_data": [{"kind": "Exercise", "id": "x139611cc"}, {"kind": "Video", "id": "x208ae23e"}, {"kind": "Video", "id": "x02913912"}, {"kind": "Video", "id": "x9fcc3ef2"}, {"kind": "Video", "id": "x6118b7f7"}, {"kind": "Video", "id": "xeae6721c"}, {"kind": "Video", "id": "xba154a49"}, {"kind": "Video", "id": "xe7444058"}, {"kind": "Video", "id": "x412842f8"}, {"kind": "Video", "id": "xbf60eaaa"}, {"kind": "Video", "id": "x103fbff6"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/drug-dependence-questions/", "id": "drug-dependence-questions", "title": "Drug dependence questions", "description": "Questions pertaining to drug dependence", "slug": "drug-dependence-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/overview-of-psychoactive-drugs/", "id": "icD3l5bhhKY", "title": "Overview of psychoactive drugs", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "overview-of-psychoactive-drugs"}, {"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/psychoactive-drugs-depressants-and-opiates/", "id": "dOlkogaWF3M", "title": "Psychoactive drugs: Depressants and opiates", "kind": "Video", "slug": "psychoactive-drugs-depressants-and-opiates"}, {"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/psychoactive-drugs-stimulants/", "id": "1Smz0zwAELQ", "title": "Psychoactive drugs: Stimulants", "kind": "Video", "slug": "psychoactive-drugs-stimulants"}, {"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/psychoactive-drugs-hallucinogens/", "id": "GUwV0gibLx8", "title": "Psychoactive drugs: Hallucinogens", "kind": "Video", "slug": "psychoactive-drugs-hallucinogens"}, {"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/drug-dependence-and-homeostasis/", "id": "X4W44wJbJgk", "title": "Drug dependence and homeostasis", "kind": "Video", "slug": "drug-dependence-and-homeostasis"}, {"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/routes-of-drug-entry/", "id": "dPmkIEkxXwc", "title": "Routes of drug entry", "kind": "Video", "slug": "routes-of-drug-entry"}, {"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/reward-pathway-in-the-brain/", "id": "YzCYuKX6zp8", "title": "Reward pathway in the brain", "kind": "Video", "slug": "reward-pathway-in-the-brain"}, {"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/tolerance-and-withdrawal/", "id": "3vKLU5_Hgco", "title": "Tolerance and withdrawal", "kind": "Video", "slug": "tolerance-and-withdrawal"}, {"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/substance-use-disorders/", "id": "LhFXw1xmaSM", "title": "Substance use disorders", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "substance-use-disorders"}, {"path": "khan/test-prep/mcat/processing-the-environment/drug-dependence/treatments-and-triggers-for-drug-dependence/", "id": "TK7NnXGrWfA", "title": "Treatments and triggers for drug dependence", "kind": "Video", "slug": "treatments-and-triggers-for-drug-dependence"}], "in_knowledge_map": false, "description": "6B: A drug is any chemical substance with a biological effect on an organism. Unfortunately, some people have addictions to drugs - 18.1% of all US adults smoke cigarettes, which have disastrous consequences on our health. You will come to appreciate the effects of drugs on our human physiology as we explore the mechanisms of psychoactive drugs such as depressants, opiates, stimulants, and hallucinogens.", "node_slug": "drug-dependence", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/drug-dependence", "extended_slug": "test-prep/mcat/processing-the-environment/drug-dependence", "kind": "Topic", "slug": "drug-dependence"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/attention-language/", "id": "attention-language", "hide": false, "title": "Attention", "child_data": [{"kind": "Exercise", "id": "xc3ed3bef"}, {"kind": "Video", "id": "x1d7ed338"}, {"kind": "Video", "id": "xa5af5a83"}, {"kind": "Video", "id": "x2d9e0890"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/attention-language/attention-questions/", "id": "attention-questions", "title": "Attention Questions", "description": "Questions pertaining to Attention", "slug": "attention-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/attention-language/divided-selective-attention-inattentional-change-blindness/", "id": "s4JBqLoY3tY", "title": "Divided attention, selective attention, inattentional blindness, & change blindness", "kind": "Video", "description": "Learn about divided attention, selective attention, inattentional blindness, & change blindness. By Carole Yue.", "slug": "divided-selective-attention-inattentional-change-blindness"}, {"path": "khan/test-prep/mcat/processing-the-environment/attention-language/selective-attention/", "id": "qpsaHE_uZic", "title": "Theories of selective attention", "kind": "Video", "description": "Learn about the three major theories of selective attention. By Carole Yue.", "slug": "selective-attention"}, {"path": "khan/test-prep/mcat/processing-the-environment/attention-language/the-spotlight-model-of-attention-and-our-ability-to-multitask/", "id": "THJgaznSBu8", "title": "The spotlight model of attention and our ability to multitask", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-spotlight-model-of-attention-and-our-ability-to-multitask"}], "in_knowledge_map": false, "description": "6B: Have you ever tried to multi-task while frantically aiming to finish a large project? The phone goes off, you get a text message, all while you try to finish an essay or read a book. In an increasingly busy world, our attention is frequently distracted by so many inputs. Here you will explore the concept of selective and divided attention, as well as the role of language in cognition and development in our lives.", "node_slug": "attention-language", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/attention-language", "extended_slug": "test-prep/mcat/processing-the-environment/attention-language", "kind": "Topic", "slug": "attention-language"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/memory/", "id": "memory", "hide": false, "title": "Memory", "child_data": [{"kind": "Exercise", "id": "xa27cdf3d"}, {"kind": "Video", "id": "x52d1966e"}, {"kind": "Video", "id": "x2f413e05"}, {"kind": "Video", "id": "xf38bb3ef"}, {"kind": "Video", "id": "x3d533add"}, {"kind": "Video", "id": "xffdb9be4"}, {"kind": "Video", "id": "x3a871e46"}, {"kind": "Video", "id": "x38b33f79"}, {"kind": "Video", "id": "x6fb13071"}, {"kind": "Video", "id": "x3dac9945"}, {"kind": "Video", "id": "x9db82d8c"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/memory/memory-questions/", "id": "memory-questions", "title": "Memory Questions", "description": "Questions pertaining to memory", "slug": "memory-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/memory/information-processing-model-sensory-working-and-long-term-memory/", "id": "pMMRE4Q2FGk", "title": "Information processing model: Sensory, working, and long term memory", "kind": "Video", "description": "Learn about the information processing model of human memory.", "slug": "information-processing-model-sensory-working-and-long-term-memory"}, {"path": "khan/test-prep/mcat/processing-the-environment/memory/encoding-strategies/", "id": "mlrOJgyPySw", "title": "Encoding strategies", "kind": "Video", "description": "Learn about rote rehearsal, chunking, mnemonic devices, self-referencing, and spacing.", "slug": "encoding-strategies"}, {"path": "khan/test-prep/mcat/processing-the-environment/memory/retrieval-cues/", "id": "aUmApJMfUTc", "title": "Retrieval cues", "kind": "Video", "description": "Learn about how priming, environmental context, and internal state affect memory.", "slug": "retrieval-cues"}, {"path": "khan/test-prep/mcat/processing-the-environment/memory/retrieval-free-recall-cued-recall-and-recognition/", "id": "i6LY9q9UIas", "title": "Retrieval: Free recall, cued recall, and recognition", "kind": "Video", "description": "Learn about three types of retrieval: free recall, cued recall, and recognition.", "slug": "retrieval-free-recall-cued-recall-and-recognition"}, {"path": "khan/test-prep/mcat/processing-the-environment/memory/memory-reconstruction-source-monitoring-and-emotional-memories/", "id": "xv-UAPbcbNU", "title": "Memory reconstruction, source monitoring, and emotional memories", "kind": "Video", "description": "Learn about memory reconstruction, source monitoring, and flashbulb memories.", "slug": "memory-reconstruction-source-monitoring-and-emotional-memories"}, {"path": "khan/test-prep/mcat/processing-the-environment/memory/long-term-potentiation-and-synaptic-plasticity/", "id": "uVQXZudZd5s", "title": "Long term potentiation and synaptic plasticity", "kind": "Video", "description": "Learn about synaptic plasticity and long-term potentiation, the physiological mechanism behind learning.", "slug": "long-term-potentiation-and-synaptic-plasticity"}, {"path": "khan/test-prep/mcat/processing-the-environment/memory/decay-and-interference/", "id": "47JRs6hF_ic", "title": "Decay and interference", "kind": "Video", "description": "Learn about decay and interference in human memory.", "slug": "decay-and-interference"}, {"path": "khan/test-prep/mcat/processing-the-environment/memory/aging-and-cognitive-abilities/", "id": "45qlm6cfHgg", "title": "Aging and cognitive abilities", "kind": "Video", "description": "Learn about how cognitive abilities change as we age.", "slug": "aging-and-cognitive-abilities"}, {"path": "khan/test-prep/mcat/processing-the-environment/memory/alzheimer-s-disease-and-korsakoff-s-syndrome/", "id": "qWfwRbSrQMU", "title": "Alzheimer's disease and Korsakoff's syndrome", "kind": "Video", "description": "Learn about how Alzheimer's Disease and Korsakoff's Syndrome affect memory.", "slug": "alzheimer-s-disease-and-korsakoff-s-syndrome"}, {"path": "khan/test-prep/mcat/processing-the-environment/memory/semantic-networks-and-spreading-activation/", "id": "0RSMKyRVuV8", "title": "Semantic networks and spreading activation", "kind": "Video", "description": "\u200bLearn about how knowledge is organized in the mind.", "slug": "semantic-networks-and-spreading-activation"}], "in_knowledge_map": false, "description": "6B: Ever since you were in grade school, memory has been one of your best friends. I\u2019m not talking about the RAM on your computer. Memory has helped you pass exams, remember the names of your friends, and made sure you know where you put your car keys. Hopefully you will remember how . We will examine the role of synapses in the physiology of neural networks such as these. You will also come to understand the structure of human memory; processes involved in normal encoding, retrieval, forgetting, and aging; and diseases affecting memory.", "node_slug": "memory", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/memory", "extended_slug": "test-prep/mcat/processing-the-environment/memory", "kind": "Topic", "slug": "memory"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/cognition/", "id": "cognition", "hide": false, "title": "Cognition", "child_data": [{"kind": "Exercise", "id": "x4a2bbad8"}, {"kind": "Video", "id": "x2b063cea"}, {"kind": "Video", "id": "xebe93b19"}, {"kind": "Video", "id": "x22fb46e3"}, {"kind": "Video", "id": "x4720caf5"}, {"kind": "Video", "id": "x9db82d8c"}, {"kind": "Video", "id": "x34bf905a"}, {"kind": "Video", "id": "x3905d9e0"}, {"kind": "Video", "id": "xc787dfb9"}, {"kind": "Video", "id": "xd7de34ec"}, {"kind": "Video", "id": "x52d1966e"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/cognition/cognition-questions/", "id": "cognition-questions", "title": "Cognition questions", "description": "Questions pertaining to cognition", "slug": "cognition-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/cognition/piagets-stages-of-cognitive-development/", "id": "Czwrqu5czFU", "title": "Piaget's stages of cognitive development", "kind": "Video", "description": "\u200bLearn about the stages and developmental milestones in Piaget's theory of cognitive development.", "slug": "piagets-stages-of-cognitive-development"}, {"path": "khan/test-prep/mcat/processing-the-environment/cognition/schemas-assimilation-and-accommodation-2/", "id": "xoAUMmZ0pzc", "title": "Schemas, assimilation, and accommodation", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schemas-assimilation-and-accommodation-2"}, {"path": "khan/test-prep/mcat/processing-the-environment/cognition/problem-solving/", "id": "W5QExA4er6w", "title": "Problem solving", "kind": "Video", "description": "Learn about types of problems and common approaches to solving them.", "slug": "problem-solving"}, {"path": "khan/test-prep/mcat/processing-the-environment/cognition/decision-making/", "id": "aNDnU3udYBg", "title": "Decision making", "kind": "Video", "description": "Learn about common heuristics, biases, and other factors that affect our decisions.", "slug": "decision-making"}, {"path": "khan/test-prep/mcat/processing-the-environment/cognition/semantic-networks-and-spreading-activation/", "id": "0RSMKyRVuV8", "title": "Semantic networks and spreading activation", "kind": "Video", "description": "\u200bLearn about how knowledge is organized in the mind.", "slug": "semantic-networks-and-spreading-activation"}, {"path": "khan/test-prep/mcat/processing-the-environment/cognition/intelligence/", "id": "C0KEPCFZ3so", "title": "Intelligence", "kind": "Video", "description": "Learn about different definitions of intelligence and the nature/nurture debate in the context of intelligence.", "slug": "intelligence"}, {"path": "khan/test-prep/mcat/processing-the-environment/cognition/theories-of-intelligence/", "id": "oaJ01Ex7DLw", "title": "Theories of intelligence", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "theories-of-intelligence"}, {"path": "khan/test-prep/mcat/processing-the-environment/cognition/aging-and-cognitive/", "id": "pADnoU7FWLg", "title": "Aging and cognitive abilities", "kind": "Video", "description": "\u200bLearn about how cognitive abilities change as we age.", "slug": "aging-and-cognitive"}, {"path": "khan/test-prep/mcat/processing-the-environment/cognition/cognitive-dissonance/", "id": "FT8eIAMLbo4", "title": "Cognitive dissonance", "kind": "Video", "slug": "cognitive-dissonance"}, {"path": "khan/test-prep/mcat/processing-the-environment/cognition/information-processing-model-sensory-working-and-long-term-memory/", "id": "pMMRE4Q2FGk", "title": "Information processing model: Sensory, working, and long term memory", "kind": "Video", "description": "Learn about the information processing model of human memory.", "slug": "information-processing-model-sensory-working-and-long-term-memory"}], "in_knowledge_map": false, "description": "6B: What is the difference between the thought processes of a five-year-old and a freshly-minted graduate with a Ph.D. in astrophysics? That would be cognition, the entirety of mental abilities relating to knowledge and memory. You will come to an understanding of cognitive development and intelligence, as well as how our minds solve problems, make decisions, and represent knowledge.", "node_slug": "cognition", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/cognition", "extended_slug": "test-prep/mcat/processing-the-environment/cognition", "kind": "Topic", "slug": "cognition"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/language/", "id": "language", "hide": false, "title": "Language", "child_data": [{"kind": "Exercise", "id": "x71bd5da8"}, {"kind": "Exercise", "id": "x8b1f2dfe"}, {"kind": "Article", "id": "x741d3c0f"}, {"kind": "Video", "id": "x1a9c4ab5"}, {"kind": "Video", "id": "xb62bacac"}, {"kind": "Video", "id": "xf3411dc4"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/language/language-questions/", "id": "language-questions", "title": "Language questions", "description": "Questions pertaining to language", "slug": "language-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/language/language-questions-2/", "id": "language-questions-2", "title": "Language questions 2", "description": "Questions pertaining to language", "slug": "language-questions-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/language/language-and-the-brain/", "id": "lBqShvm4QRA", "title": "Language and the brain: Aphasia and split-brain patients", "kind": "Video", "description": "Learn about language areas of the brain and the effects of damage to those parts of the brain. By Carole Yue.", "slug": "language-and-the-brain"}, {"path": "khan/test-prep/mcat/processing-the-environment/language/language-and-cognition/", "id": "RgvmKfvCwps", "title": "Theories of language and cognition", "kind": "Video", "description": "Learn about theories of the relationship between language and cognition. By Carole Yue.", "slug": "language-and-cognition"}, {"path": "khan/test-prep/mcat/processing-the-environment/language/theories-of-language-development/", "id": "RRGwdfQV8kU", "title": "Theories of language development: Nativist, learning, interactionist", "kind": "Video", "description": "Learn about the nativist, learning, and interactionist theories of human language development. By Carole Yue.", "slug": "theories-of-language-development"}], "in_knowledge_map": false, "description": "6C: Were it not for the intricate structure of the English language, these letters on the webpage would be absolutely meaningless. As we grow up, we effortlessly pick up the syntax of our mother tongue, babbling as toddlers and maturing to write essays as teenagers. You will explore theories on the development of language and cognition and how our system of language may be disrupted by pathological neurological events like strokes.", "node_slug": "language", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/language", "extended_slug": "test-prep/mcat/processing-the-environment/language", "kind": "Topic", "slug": "language"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/emotion/", "id": "emotion", "hide": false, "title": "Emotion", "child_data": [{"kind": "Exercise", "id": "x59326ae3"}, {"kind": "Video", "id": "x639b76fd"}, {"kind": "Video", "id": "x7e6e34b8"}, {"kind": "Video", "id": "x8fc432d5"}, {"kind": "Video", "id": "x3ac472a8"}, {"kind": "Video", "id": "x46a0c767"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/emotion/emotion-questions/", "id": "emotion-questions", "title": "Emotion questions", "description": "Questions pertaining to emotion", "slug": "emotion-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/emotion/emotions-limbic-system/", "id": "GDlDirzOSI8", "title": "Emotions: limbic system", "kind": "Video", "slug": "emotions-limbic-system"}, {"path": "khan/test-prep/mcat/processing-the-environment/emotion/emotions-cerebral-hemispheres-and-prefrontal-cortex/", "id": "TQ51Gsb98ec", "title": "Emotions: cerebral hemispheres and prefrontal cortex", "kind": "Video", "slug": "emotions-cerebral-hemispheres-and-prefrontal-cortex"}, {"path": "khan/test-prep/mcat/processing-the-environment/emotion/autonomic-nervous-system-ans-and-physiologic-markers-of-emotion/", "id": "yIWKrQTznXc", "title": "Autonomic nervous system (ANS) and physiologic markers of emotion", "kind": "Video", "slug": "autonomic-nervous-system-ans-and-physiologic-markers-of-emotion"}, {"path": "khan/test-prep/mcat/processing-the-environment/emotion/three-components-of-emotion-and-the-universal-emotions/", "id": "qOYCeAlukMk", "title": "Three components of emotion and the universal emotions", "kind": "Video", "slug": "three-components-of-emotion-and-the-universal-emotions"}, {"path": "khan/test-prep/mcat/processing-the-environment/emotion/theories-of-emotion/", "id": "FkDVucEoJpU", "title": "Theories of Emotion", "kind": "Video", "slug": "theories-of-emotion"}], "in_knowledge_map": false, "description": "6C: You may tear up when you hear a friend\u2019s story of heartbreak or burst out in laughter during the airing of your favorite sitcom. Were it not for the neural processing of emotion within your brain as you take in these sensory inputs, you would not feel sadness on hearing of the tragedy or glee while viewing the comedy. Here you will learn about the physiological, behavioral, and cognitive components of emotion as well as how the different areas of our areas of our brain play a role in emotion.", "node_slug": "emotion", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/emotion", "extended_slug": "test-prep/mcat/processing-the-environment/emotion", "kind": "Topic", "slug": "emotion"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/processing-the-environment/stress/", "id": "stress", "hide": false, "title": "Stress", "child_data": [{"kind": "Exercise", "id": "x72858654"}, {"kind": "Video", "id": "xac1ccb66"}, {"kind": "Video", "id": "xf04d3566"}, {"kind": "Video", "id": "x47439c46"}, {"kind": "Video", "id": "xd07b9d29"}, {"kind": "Video", "id": "xfe0b499a"}, {"kind": "Video", "id": "x23b431cc"}], "children": [{"path": "khan/test-prep/mcat/processing-the-environment/stress/stress-questions/", "id": "stress-questions", "title": "Stress Questions", "description": "Questions pertaining to stress", "slug": "stress-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/processing-the-environment/stress/what-is-stress/", "id": "SH3O8G5B8dE", "title": "What is stress?", "kind": "Video", "slug": "what-is-stress"}, {"path": "khan/test-prep/mcat/processing-the-environment/stress/stressors/", "id": "hRgAA8IH834", "title": "Stressors", "kind": "Video", "slug": "stressors"}, {"path": "khan/test-prep/mcat/processing-the-environment/stress/responding-to-stress/", "id": "bUstOWF_Ftc", "title": "Responding to stress", "kind": "Video", "slug": "responding-to-stress"}, {"path": "khan/test-prep/mcat/processing-the-environment/stress/physical-effects-of-stress/", "id": "uMqM0I5ojs0", "title": "Physical effects of stress", "kind": "Video", "slug": "physical-effects-of-stress"}, {"path": "khan/test-prep/mcat/processing-the-environment/stress/behavioral-effects-of-stress/", "id": "9zY5dhi6IZY", "title": "Behavioral effects of stress", "kind": "Video", "slug": "behavioral-effects-of-stress"}, {"path": "khan/test-prep/mcat/processing-the-environment/stress/stress-management/", "id": "39N5IKGfRmQ", "title": "Stress management", "kind": "Video", "slug": "stress-management"}], "in_knowledge_map": false, "description": "6C: Perhaps when you think about stress, you may think of that nerve-wracking sensation you may feel in your stomach before the final exam for organic chemistry you studied all month for or your shivering response to a chilly winter night. But stress can also be the microtraumas inflicted on yourself during exercise. Stress can be a good thing that forces our antifragile bodies to adapt to a changing external environment. Stress is the natural process by which we evaluate and respond to the challenges and threats of our environment. Jump into this playlist to learn about stressors, stress reactions, the effects of stress, and strategies to manage this wild process.", "node_slug": "stress", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/processing-the-environment/stress", "extended_slug": "test-prep/mcat/processing-the-environment/stress", "kind": "Topic", "slug": "stress"}], "in_knowledge_map": false, "description": "Foundational Concept 6: Biological, psychological, and socio-cultural factors influence the ways that individuals perceive, think about, and react to the world.", "node_slug": "processing-the-environment", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/processing-the-environment", "extended_slug": "test-prep/mcat/processing-the-environment", "kind": "Topic", "slug": "processing-the-environment"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/", "id": "behavior", "hide": false, "title": "Behavior", "child_data": [{"kind": "Topic", "id": "x0b9ff823"}, {"kind": "Topic", "id": "x8916086d"}, {"kind": "Topic", "id": "x8f4cea25"}, {"kind": "Topic", "id": "xb6a6edd1"}, {"kind": "Topic", "id": "x6228433e"}, {"kind": "Topic", "id": "xccaa4bfe"}, {"kind": "Topic", "id": "x2064c443"}, {"kind": "Topic", "id": "x0f83d238"}, {"kind": "Topic", "id": "x9762510b"}, {"kind": "Topic", "id": "x6807763e"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/", "id": "biological-basis-of-behavior-ner", "hide": false, "title": "Biological basis of behavior: Nervous system", "child_data": [{"kind": "Exercise", "id": "x35952485"}, {"kind": "Video", "id": "xc550a5c4"}, {"kind": "Video", "id": "x5b1e791e"}, {"kind": "Video", "id": "xa9b71784"}, {"kind": "Video", "id": "xa82be47f"}, {"kind": "Video", "id": "xedf571fd"}, {"kind": "Video", "id": "xb67fb1c0"}, {"kind": "Video", "id": "xcf330c2e"}, {"kind": "Video", "id": "x4125f8d9"}, {"kind": "Video", "id": "xfef2f16a"}, {"kind": "Video", "id": "xda7ddf7a"}, {"kind": "Video", "id": "x6e5e3159"}, {"kind": "Video", "id": "x8fc48fb6"}, {"kind": "Video", "id": "xef6206dc"}, {"kind": "Video", "id": "x6fa54c20"}, {"kind": "Video", "id": "x484d10c3"}, {"kind": "Video", "id": "xff5c3e85"}, {"kind": "Video", "id": "x68d2cd26"}, {"kind": "Video", "id": "x36b61007"}, {"kind": "Video", "id": "x7840b478"}, {"kind": "Video", "id": "x12aba748"}, {"kind": "Video", "id": "x6f7ced67"}, {"kind": "Video", "id": "xbb5f4355"}], "children": [{"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/biological-basis-of-behavior-endocrine-system-questions/", "id": "biological-basis-of-behavior--endocrine-system-questions", "title": "Biological basis of behavior: endocrine system questions", "description": "Questions pertaining to how the endocrine system influences behavior", "slug": "biological-basis-of-behavior-endocrine-system-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/structure-of-the-nervous-system/", "id": "jmD0LBdAvlE", "title": "Structure of the nervous system", "kind": "Video", "slug": "structure-of-the-nervous-system"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/functions-of-the-nervous-system/", "id": "qrK-FBdjGk4", "title": "Functions of the nervous system", "kind": "Video", "slug": "functions-of-the-nervous-system"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/motor-unit/", "id": "vXb0ZvkFkS8", "title": "Motor unit", "kind": "Video", "slug": "motor-unit"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/peripheral-somatosensation/", "id": "oOIqk5hXBt4", "title": "Peripheral somatosensation", "kind": "Video", "slug": "peripheral-somatosensation"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/muscle-stretch-reflex/", "id": "Ya-3XHBWDqs", "title": "Muscle stretch reflex", "kind": "Video", "slug": "muscle-stretch-reflex"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/autonomic-nervous-system/", "id": "jA1NyCE4M2g", "title": "Autonomic nervous system", "kind": "Video", "slug": "autonomic-nervous-system"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/gray-and-white-matter/", "id": "ZZQzMeFoZY0", "title": "Gray and white matter", "kind": "Video", "slug": "gray-and-white-matter"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/upper-motor-neurons/", "id": "aASSUcUSBro", "title": "Upper motor neurons", "kind": "Video", "slug": "upper-motor-neurons"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/somatosensory-tracts/", "id": "vrmKqH8d1RM", "title": "Somatosensory tracts", "kind": "Video", "slug": "somatosensory-tracts"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/overview-of-the-functions-of-the-cerebral-cortex/", "id": "X-m0JDCw6TE", "title": "Overview of the functions of the cerebral cortex", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "overview-of-the-functions-of-the-cerebral-cortex"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/hemispheric-differences-and-hemispheric-dominance/", "id": "X4IL333rppM", "title": "Hemispheric differences and hemispheric dominance", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hemispheric-differences-and-hemispheric-dominance"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/the-old-brain/", "id": "GEJ5c2ACtGk", "title": "The old brain", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-old-brain"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/cerebellum/", "id": "xf1okjCwdOg", "title": "Cerebellum", "kind": "Video", "slug": "cerebellum"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/brainstem/", "id": "MxDP1B5mKWA", "title": "Brainstem", "kind": "Video", "slug": "brainstem"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/subcortical-cerebrum/", "id": "A_2f3onF3S8", "title": "Subcortical cerebrum", "kind": "Video", "slug": "subcortical-cerebrum"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/cerebral-cortex/", "id": "mGxomKWfJXs", "title": "Cerebral cortex", "kind": "Video", "slug": "cerebral-cortex"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/neurotransmitter-anatomy/", "id": "fYUpLvM5X7A", "title": "Neurotransmitter anatomy", "kind": "Video", "slug": "neurotransmitter-anatomy"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/early-methods-of-studying-the-brain/", "id": "vMTe6qXUHVs", "title": "Early methods of studying the brain", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "early-methods-of-studying-the-brain"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/lesion-studies-and-experimental-ablation/", "id": "haidlj3cTAA", "title": "Lesion studies and experimental ablation", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "lesion-studies-and-experimental-ablation"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/modern-ways-of-studying-the-brain/", "id": "hCFtl4npukU", "title": "Modern ways of studying the brain", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "modern-ways-of-studying-the-brain"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/endocrine-system-and-influence-on-behavior-part-1/", "id": "cQKPvT-aEqk", "title": "Endocrine system and influence on behavior - Part 1", "kind": "Video", "slug": "endocrine-system-and-influence-on-behavior-part-1"}, {"path": "khan/test-prep/mcat/behavior/biological-basis-of-behavior-ner/endocrine-system-and-influence-on-behavior-part-2/", "id": "2dZpQJSSSAs", "title": "Endocrine system and influence on behavior - Part 2", "kind": "Video", "slug": "endocrine-system-and-influence-on-behavior-part-2"}], "in_knowledge_map": false, "description": "7A: The very fact that you are able to understand this sentence means that neurons in your brain (85 billion in total) are talking to each other. Neurons are the living substance of the nervous system, which extends beyond the brain to the spinal cord and peripherally, allows you to think and process, make decisions, stand up straight, maintain your heart rate, rest and digest. You will come to appreciate the structure and function of the nervous system as we delve into its anatomy and physiology, from the gray and white matter to the cerebellum to the neurons.", "node_slug": "biological-basis-of-behavior-ner", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/behavior/biological-basis-of-behavior-ner", "extended_slug": "test-prep/mcat/behavior/biological-basis-of-behavior-ner", "kind": "Topic", "slug": "biological-basis-of-behavior-ner"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/human-development/", "id": "human-development", "hide": false, "title": "Human development", "child_data": [{"kind": "Exercise", "id": "x993f6f5c"}, {"kind": "Video", "id": "x775087f6"}, {"kind": "Video", "id": "x64e1d5b5"}, {"kind": "Video", "id": "x99609191"}, {"kind": "Video", "id": "x6e7f0f8f"}, {"kind": "Video", "id": "xbbba6969"}, {"kind": "Video", "id": "x34bf9123"}, {"kind": "Video", "id": "xcbee2fd6"}, {"kind": "Video", "id": "x468c394e"}, {"kind": "Video", "id": "xce2c119f"}, {"kind": "Video", "id": "x7db6fd1e"}], "children": [{"path": "khan/test-prep/mcat/behavior/human-development/human-physiological-development/", "id": "human-physiological-development", "title": "Human physiological development", "description": "Free-standing questions on human physiological development", "slug": "human-physiological-development", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/behavior/human-development/egg-sperm-and-fertilization/", "id": "7ww5T7hCdn4", "title": "Egg, sperm, and fertilization", "kind": "Video", "slug": "egg-sperm-and-fertilization"}, {"path": "khan/test-prep/mcat/behavior/human-development/early-embryogenesis-cleavage-blastulation-gastrulation-and-neurulation/", "id": "dAOWQC-OBv0", "title": "Early embryogenesis - Cleavage, blastulation, gastrulation, and neurulation", "kind": "Video", "slug": "early-embryogenesis-cleavage-blastulation-gastrulation-and-neurulation"}, {"path": "khan/test-prep/mcat/behavior/human-development/implantation/", "id": "1KL8HAm3uSY", "title": "Implantation", "kind": "Video", "slug": "implantation"}, {"path": "khan/test-prep/mcat/behavior/human-development/germ-layer-derivatives/", "id": "QPvhl66QCqo", "title": "Germ layer derivatives", "kind": "Video", "slug": "germ-layer-derivatives"}, {"path": "khan/test-prep/mcat/behavior/human-development/gestation/", "id": "_-1m1GsuH1M", "title": "Gestation", "kind": "Video", "slug": "gestation"}, {"path": "khan/test-prep/mcat/behavior/human-development/major-motor-milestones/", "id": "Y8ortjAPw0Q", "title": "Major motor milestones", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "major-motor-milestones"}, {"path": "khan/test-prep/mcat/behavior/human-development/motor-development/", "id": "zM_aEudpMkc", "title": "Motor development", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "motor-development"}, {"path": "khan/test-prep/mcat/behavior/human-development/neonatal-reflexes/", "id": "ARZD9Qid9lU", "title": "Neonatal reflexes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "neonatal-reflexes"}, {"path": "khan/test-prep/mcat/behavior/human-development/physical-development-in-adolescence/", "id": "DWKWjpVsGng", "title": "Physical development in adolescence", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "physical-development-in-adolescence"}, {"path": "khan/test-prep/mcat/behavior/human-development/brain-changes-during-adolescence/", "id": "5Fa8U6BkhNo", "title": "Brain changes during adolescence", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "brain-changes-during-adolescence"}], "in_knowledge_map": false, "description": "", "node_slug": "human-development", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/behavior/human-development", "extended_slug": "test-prep/mcat/behavior/human-development", "kind": "Topic", "slug": "human-development"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/behavior-and-genetics/", "id": "behavior-and-genetics", "hide": false, "title": "Behavior and genetics", "child_data": [{"kind": "Exercise", "id": "xd815f1db"}, {"kind": "Article", "id": "x2c1fc0f8"}, {"kind": "Video", "id": "x21062e33"}, {"kind": "Video", "id": "x9635037c"}, {"kind": "Video", "id": "x319f6d31"}, {"kind": "Video", "id": "xdc2ea9e9"}, {"kind": "Video", "id": "x777976b6"}, {"kind": "Video", "id": "xc20bc0f8"}], "children": [{"path": "khan/test-prep/mcat/behavior/behavior-and-genetics/behavior-and-genetics-questions/", "id": "behavior-and-genetics-questions", "title": "Behavior and genetics questions", "description": "Behavior and genetics questions", "slug": "behavior-and-genetics-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/behavior/behavior-and-genetics/temperment-heredity-genes/", "id": "4dcGgUrkttY", "title": "Temperament, heredity, and genes", "kind": "Video", "slug": "temperment-heredity-genes"}, {"path": "khan/test-prep/mcat/behavior/behavior-and-genetics/twin-studies-and-adoption-studies/", "id": "usnv1_xRCvs", "title": "Twin studies and adoption studies", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "twin-studies-and-adoption-studies"}, {"path": "khan/test-prep/mcat/behavior/behavior-and-genetics/heritability/", "id": "m0T2miip8jo", "title": "Heritability", "kind": "Video", "slug": "heritability"}, {"path": "khan/test-prep/mcat/behavior/behavior-and-genetics/regulatory-genes/", "id": "rs6UkVaOPzo", "title": "Regulatory genes", "kind": "Video", "slug": "regulatory-genes"}, {"path": "khan/test-prep/mcat/behavior/behavior-and-genetics/gene-environment-interaction/", "id": "sMyZO9YDlk8", "title": "Gene environment interaction", "kind": "Video", "slug": "gene-environment-interaction"}, {"path": "khan/test-prep/mcat/behavior/behavior-and-genetics/adaptive-value-of-behavioral-traits/", "id": "tp4I9J5viS4", "title": "Adaptive value of behavioral traits", "kind": "Video", "slug": "adaptive-value-of-behavioral-traits"}], "in_knowledge_map": false, "description": "7A: Nature vs. nurture - it\u2019s a dilemma scientists have aimed to answer for years. Do our surroundings or genetics have a greater impact on the individuals we eventually become? You will learn about the way our genes and experiences shape the ways we respond to our environment as we discuss experiments such as twin and adoption studies in the context of development.", "node_slug": "behavior-and-genetics", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/behavior/behavior-and-genetics", "extended_slug": "test-prep/mcat/behavior/behavior-and-genetics", "kind": "Topic", "slug": "behavior-and-genetics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/", "id": "physiological-and-sociocultural-concepts-of-motivation-and-attitudes", "hide": false, "title": "Motivation and attitudes", "child_data": [{"kind": "Exercise", "id": "x66125c88"}, {"kind": "Article", "id": "x2c955b7d"}, {"kind": "Video", "id": "x1c7c7112"}, {"kind": "Video", "id": "x034aed5b"}, {"kind": "Video", "id": "x493941e7"}, {"kind": "Video", "id": "xbdc6fe51"}, {"kind": "Video", "id": "x3d64f645"}, {"kind": "Video", "id": "x308e9e08"}, {"kind": "Video", "id": "x56305305"}, {"kind": "Video", "id": "xf7bb4631"}, {"kind": "Video", "id": "xd7de34ec"}, {"kind": "Video", "id": "x3c876f5e"}], "children": [{"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/motivations-and-attitudes-questions/", "id": "motivations-and-attitudes-questions", "title": "Motivations and attitudes questions", "description": "Motivations and attitudes questions", "slug": "motivations-and-attitudes-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/physiological-concept-of-positive-and-negative-feedback/", "id": "zv8LHyH7_rI", "title": "Physiological concept of positive and negative feedback", "kind": "Video", "slug": "physiological-concept-of-positive-and-negative-feedback"}, {"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/instincts-arousal-needs-drives-drive-reduction-and-cognitive-theories/", "id": "LHnHXS51J4E", "title": "Instincts, Arousal, Needs, Drives: Drive-Reduction and Cognitive Theories", "kind": "Video", "slug": "instincts-arousal-needs-drives-drive-reduction-and-cognitive-theories"}, {"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/maslows-hierarchy-of-needs/", "id": "JPhd76sGIs8", "title": "Maslow's hierarchy of needs", "kind": "Video", "slug": "maslows-hierarchy-of-needs"}, {"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/incentive-theory/", "id": "vr9k-TO1_Zc", "title": "Incentive theory", "kind": "Video", "slug": "incentive-theory"}, {"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/biological-and-sociocultural-factors-food-sex-and-drugs/", "id": "iyaq_zkxpqI", "title": "Biological and Sociocultural Factors Food, Sex, and Drugs", "kind": "Video", "slug": "biological-and-sociocultural-factors-food-sex-and-drugs"}, {"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/components-of-attitude/", "id": "cDq1_R-J51w", "title": "Components of attitudes", "kind": "Video", "slug": "components-of-attitude"}, {"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/attitude-influences-behavior/", "id": "XJdE7awhJg0", "title": "Attitude influences behavior", "kind": "Video", "slug": "attitude-influences-behavior"}, {"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/behavior-influences-attitude/", "id": "ayP43bc7kww", "title": "Behavior influences attitude", "kind": "Video", "slug": "behavior-influences-attitude"}, {"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/cognitive-dissonance/", "id": "FT8eIAMLbo4", "title": "Cognitive dissonance", "kind": "Video", "slug": "cognitive-dissonance"}, {"path": "khan/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes/situational-approach/", "id": "oj8Lkb-61BI", "title": "Situational approach", "kind": "Video", "slug": "situational-approach"}], "in_knowledge_map": false, "description": "7A: What makes us do the things we do, or feel the way we feel in situations? Explore how the physiological and psycho-social theories, factors, and situations behind how motivation, attitudes, and behavior are inter-related.", "node_slug": "physiological-and-sociocultural-concepts-of-motivation-and-attitudes", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes", "extended_slug": "test-prep/mcat/behavior/physiological-and-sociocultural-concepts-of-motivation-and-attitudes", "kind": "Topic", "slug": "physiological-and-sociocultural-concepts-of-motivation-and-attitudes"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/theories-personality/", "id": "theories-personality", "hide": false, "title": "Theories of personality", "child_data": [{"kind": "Exercise", "id": "x72dc4569"}, {"kind": "Video", "id": "x3c876f5e"}, {"kind": "Video", "id": "x654caea1"}, {"kind": "Video", "id": "x4346b6c0"}, {"kind": "Video", "id": "xa3e1ed51"}, {"kind": "Video", "id": "xe0c0ffac"}, {"kind": "Video", "id": "x8a4b9187"}, {"kind": "Video", "id": "xa17c1cb0"}, {"kind": "Video", "id": "x57a12950"}, {"kind": "Video", "id": "xc459a21e"}, {"kind": "Video", "id": "x7913db44"}], "children": [{"path": "khan/test-prep/mcat/behavior/theories-personality/theories-of-personality-questions/", "id": "theories-of-personality-questions", "title": "Theories of Personality Questions", "description": "Questions pertaining to Theories of Personality", "slug": "theories-of-personality-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/behavior/theories-personality/situational-approach/", "id": "oj8Lkb-61BI", "title": "Situational approach", "kind": "Video", "slug": "situational-approach"}, {"path": "khan/test-prep/mcat/behavior/theories-personality/psychoanalytic-theory/", "id": "jdawTFsCNtc", "title": "Psychoanalytic theory", "kind": "Video", "description": "Learn about Sigmund Freud's Psychoanalytic Theory of Personality and the different structures of our mind that contribute to our personality. By Shreena Desai.", "slug": "psychoanalytic-theory"}, {"path": "khan/test-prep/mcat/behavior/theories-personality/maslow-hierarchy-of-needs/", "id": "P6PEf9WtEvs", "title": "Maslow's hierarchy of needs", "kind": "Video", "description": "Abraham Maslow's Hierarchy of Needs is a basic psychology concept in understanding the Humanistic approach to personality and behaviors. By Shreena Desai.", "slug": "maslow-hierarchy-of-needs"}, {"path": "khan/test-prep/mcat/behavior/theories-personality/humanistic-theory/", "id": "3UcjojHetfE", "title": "Humanistic theory", "kind": "Video", "description": "A major branch of psychology is Humanism. Learn what the humanistic theorists have to say about how we develop our personality. By Shreena Desai.", "slug": "humanistic-theory"}, {"path": "khan/test-prep/mcat/behavior/theories-personality/biological-theory/", "id": "FfugceYn140", "title": "Biological theory", "kind": "Video", "description": "Nature or Nurture? The Biologic Theory of Personality addresses the role evolution and biology play in our personality development. By Shreena Desai.", "slug": "biological-theory"}, {"path": "khan/test-prep/mcat/behavior/theories-personality/behavioral-theory/", "id": "x7wZCtFWblE", "title": "Behavioral theory", "kind": "Video", "description": "Explore the contributions two major behavioral theorists have made to the Behavioral Theory of Personality. By Shreena Desai.", "slug": "behavioral-theory"}, {"path": "khan/test-prep/mcat/behavior/theories-personality/trait-theory/", "id": "Hxk6GCKUiZI", "title": "Trait theory", "kind": "Video", "description": "Learn how our traits make up our personality by taking a look at different psychologists' perspectives in how the Trait Theory came to be. By Shreena Desai.", "slug": "trait-theory"}, {"path": "khan/test-prep/mcat/behavior/theories-personality/observational-learning/", "id": "wf3-tRpmGmY", "title": "Observational learning: Bobo doll experiment and social cognitive theory", "kind": "Video", "description": "An explanation of the Bobo Doll Experiment, how it demonstrated learning performance distinction, and resulted in Bandura's Social Cognitive Theory. By Jeffrey Walsh.", "slug": "observational-learning"}, {"path": "khan/test-prep/mcat/behavior/theories-personality/defense-mechanisms/", "id": "9bHm8_kq3DA", "title": "Defense mechanisms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "defense-mechanisms"}, {"path": "khan/test-prep/mcat/behavior/theories-personality/freud-death-drive-reality-principle-and-pleasure-principle/", "id": "6uPl2ytYhjI", "title": "Freud - Death drive, reality principle, and pleasure principle", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "freud-death-drive-reality-principle-and-pleasure-principle"}], "in_knowledge_map": false, "description": "7A: Curious about your personality? It\u2019s a complex thing which is difficult to define in even a book. Nonetheless, throughout history, several notable psychologists and schools of thought have attempted to figure out how to organize and categorize human personalities. We will review these theories and see which one resonates the most with you! By Shreena Desai.\nMotivation and attitudes - What makes us dot he things we do, or feel the way we feel in various social situations? We will discuss how the physiological and psycho-social theories, factors, and situations behind motivation, attitudes, and behavior are interrelated.", "node_slug": "theories-personality", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/behavior/theories-personality", "extended_slug": "test-prep/mcat/behavior/theories-personality", "kind": "Topic", "slug": "theories-personality"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/psychological-disorders/", "id": "psychological-disorders", "hide": false, "title": "Psychological disorders", "child_data": [{"kind": "Exercise", "id": "x2fa2b8e0"}, {"kind": "Article", "id": "x431ad70f"}, {"kind": "Article", "id": "xc5e5e364"}, {"kind": "Video", "id": "x0db61ad4"}, {"kind": "Video", "id": "x60936710"}, {"kind": "Video", "id": "x4912639c"}, {"kind": "Video", "id": "x516879c5"}, {"kind": "Video", "id": "xeb1f7f74"}, {"kind": "Video", "id": "x9770f529"}, {"kind": "Video", "id": "xb2f53c6b"}, {"kind": "Video", "id": "x07fdbc1c"}, {"kind": "Video", "id": "xd84b4846"}, {"kind": "Video", "id": "xd109a8fb"}, {"kind": "Video", "id": "x8e82e7f2"}, {"kind": "Video", "id": "xe7444058"}, {"kind": "Video", "id": "xeae6721c"}, {"kind": "Video", "id": "x412842f8"}, {"kind": "Video", "id": "x300916a4"}, {"kind": "Video", "id": "x6e2857d7"}, {"kind": "Video", "id": "xf9f1a89c"}, {"kind": "Video", "id": "xb9866dbd"}], "children": [{"path": "khan/test-prep/mcat/behavior/psychological-disorders/psychological-disorders-questions/", "id": "psychological-disorders-questions", "title": "Psychological Disorders Questions", "description": "Questions pertaining to Psychological Disorders", "slug": "psychological-disorders-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/introduction-to-mental-disorders/", "id": "FxPXC8t-2ls", "title": "Introduction to mental disorders", "kind": "Video", "slug": "introduction-to-mental-disorders"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/categories-of-mental-disorders/", "id": "yar47jvr7M8", "title": "Categories of mental disorders", "kind": "Video", "slug": "categories-of-mental-disorders"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/schizophrenia/", "id": "xW1UeIxEzoM", "title": "Schizophrenia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizophrenia"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/biological-basis-of-schizophrenia/", "id": "6D_yOm6bjkw", "title": "Biological basis of schizophrenia", "kind": "Video", "slug": "biological-basis-of-schizophrenia"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/biological-basis-of-depression/", "id": "QEjWLj5wAFM", "title": "Biological basis of depression", "kind": "Video", "slug": "biological-basis-of-depression"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/anxiety-disorders-and-obsessive-compulsive-disorder/", "id": "9RYCKd6Ac2U", "title": "Anxiety disorders and obsessive compulsive disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "anxiety-disorders-and-obsessive-compulsive-disorder"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/dissociative-identity-disorder/", "id": "Zet3X0zLs9A", "title": "Dissociative identity disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "dissociative-identity-disorder"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/somatic-symptom-disorder-and-other-disorders/", "id": "8G5WFKUzvA8", "title": "Somatic symptom disorder and other disorders", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "somatic-symptom-disorder-and-other-disorders"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/personality-disorders/", "id": "-Xv593jgyJ4", "title": "Personality disorders", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "personality-disorders"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/sleep-disorders/", "id": "VBcEz8bVbL0", "title": "Sleep disorders", "kind": "Video", "slug": "sleep-disorders"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/sleep-wake-disorders-breathing-related-sleep-disorders-2/", "id": "HDOJe3JPmJM", "title": "Sleep wake disorders breathing related sleep disorders", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "sleep-wake-disorders-breathing-related-sleep-disorders-2"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/reward-pathway-in-the-brain/", "id": "YzCYuKX6zp8", "title": "Reward pathway in the brain", "kind": "Video", "slug": "reward-pathway-in-the-brain"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/drug-dependence-and-homeostasis/", "id": "X4W44wJbJgk", "title": "Drug dependence and homeostasis", "kind": "Video", "slug": "drug-dependence-and-homeostasis"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/tolerance-and-withdrawal/", "id": "3vKLU5_Hgco", "title": "Tolerance and withdrawal", "kind": "Video", "slug": "tolerance-and-withdrawal"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/substance-use-disorders-2/", "id": "tPhcRBkVmUM", "title": "Substance use disorders", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "substance-use-disorders-2"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/biological-basis-of-parkinsons-disease/", "id": "uL3grek6D54", "title": "Biological basis of parkinson's disease", "kind": "Video", "slug": "biological-basis-of-parkinsons-disease"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/depression-and-major-depressive-disorder/", "id": "tOVJgYHj6kc", "title": "Depression and major depressive disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "depression-and-major-depressive-disorder"}, {"path": "khan/test-prep/mcat/behavior/psychological-disorders/depression-and-bipolar-disorder/", "id": "BC3csSM6G-s", "title": "Depression and bipolar disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "depression-and-bipolar-disorder"}], "in_knowledge_map": false, "description": "When someone breaks their leg they get a cast to fix the damage and when someone gets a papercut, they use a bandaid. But what happens when someone\u2019s mind needs to be healed? Although many mental disorders are difficult to diagnose, these videos explore the symptoms and biological explanations of a few mental disorders that are extensively researched.", "node_slug": "psychological-disorders", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/behavior/psychological-disorders", "extended_slug": "test-prep/mcat/behavior/psychological-disorders", "kind": "Topic", "slug": "psychological-disorders"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/social-psychology/", "id": "social-psychology", "hide": false, "title": "Social psychology", "child_data": [{"kind": "Exercise", "id": "x75744a4c"}, {"kind": "Video", "id": "x4c2f203e"}, {"kind": "Video", "id": "xc9f1e670"}, {"kind": "Video", "id": "xc0a30846"}, {"kind": "Video", "id": "xce3b7cd8"}, {"kind": "Video", "id": "x441c99f8"}, {"kind": "Video", "id": "xaebd0454"}, {"kind": "Video", "id": "x9f33931e"}, {"kind": "Video", "id": "x3023022d"}, {"kind": "Video", "id": "xd5b9bbaa"}, {"kind": "Video", "id": "x0ab2788b"}, {"kind": "Video", "id": "xd4accc32"}, {"kind": "Video", "id": "xaf2b7807"}, {"kind": "Exercise", "id": "x35caf25f"}], "children": [{"path": "khan/test-prep/mcat/behavior/social-psychology/social-psychology-questions/", "id": "social-psychology-questions", "title": "Social psychology questions", "description": "Social psychology questions", "slug": "social-psychology-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/conformity-and-groupthink/", "id": "ds3-ljxTRvo", "title": "Conformity and groupthink", "kind": "Video", "slug": "conformity-and-groupthink"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/conformity-and-obedience/", "id": "Loy1zLkbuF0", "title": "Conformity and obedience", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "conformity-and-obedience"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/asch-conformity-studies-asch-line-studies/", "id": "p3MPAgnbMk8", "title": "Asch conformity studies (Asch line studies)", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "asch-conformity-studies-asch-line-studies"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/events-that-inspired-the-milgram-studies-on-obedience/", "id": "hTi7wvRE9UQ", "title": "Events that inspired the Milgram studies on obedience", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "events-that-inspired-the-milgram-studies-on-obedience"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/milgram-experiment-on-obedience/", "id": "PJFzqfLMBIw", "title": "Milgram experiment on obedience", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "milgram-experiment-on-obedience"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/what-can-we-learn-from-the-milgram-experiment/", "id": "LTZKp8nOhVU", "title": "What can we learn from the Milgram experiment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-can-we-learn-from-the-milgram-experiment"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/zimbardo-prison-study-the-stanford-prison-experiment/", "id": "d2TCfex1aFw", "title": "Zimbardo prison study The Stanford prison experiment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "zimbardo-prison-study-the-stanford-prison-experiment"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/a-closer-look-at-the-stanford-prison-experiment/", "id": "fS-YgKwAco8", "title": "A closer look at the Stanford prison experiment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "a-closer-look-at-the-stanford-prison-experiment"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/factors-that-influence-obedience-and-conformity/", "id": "LG6H_8BU-f4", "title": "Factors that influence obedience and conformity", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "factors-that-influence-obedience-and-conformity"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/bystander-effect/", "id": "175ig2I9rt0", "title": "Bystander effect", "kind": "Video", "slug": "bystander-effect"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/social-facilitation-and-social-loafing/", "id": "yT-BpKlHMps", "title": "Social facilitation and social loafing", "kind": "Video", "slug": "social-facilitation-and-social-loafing"}, {"path": "khan/test-prep/mcat/behavior/social-psychology/agents-of-socialization/", "id": "PF7m1fFr2eQ", "title": "Agents of socialization", "kind": "Video", "slug": "agents-of-socialization"}], "in_knowledge_map": false, "description": "Birds of a feather flock together. How do we explain these and other observations in the way we interact with fellow human beings? We will dive into the fascinating and relevant world of social psychology as we discuss concepts which you may have noticed in real life. You will come to know the names of such phenomena as well as the specific factors that motivate people to behave the way they do in groups.", "node_slug": "social-psychology", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/behavior/social-psychology", "extended_slug": "test-prep/mcat/behavior/social-psychology", "kind": "Topic", "slug": "social-psychology"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/normative-and-non-normative-behavior/", "id": "normative-and-non-normative-behavior", "hide": false, "title": "Normative and non-normative behavior", "child_data": [{"kind": "Exercise", "id": "xb485bce0"}, {"kind": "Video", "id": "x1e085618"}, {"kind": "Video", "id": "xd7ad0f3b"}, {"kind": "Video", "id": "x2b084132"}], "children": [{"path": "khan/test-prep/mcat/behavior/normative-and-non-normative-behavior/normative-and-nonnormative-behavior-questions/", "id": "normative-and-nonnormative-behavior-questions", "title": "Normative and nonnormative behavior questions", "description": "Normative and nonnormative behavior questions", "slug": "normative-and-nonnormative-behavior-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/behavior/normative-and-non-normative-behavior/what-is-normal/", "id": "tOEz6RC0aVo", "title": "What is normal? Exploring folkways, mores, and taboos", "kind": "Video", "slug": "what-is-normal"}, {"path": "khan/test-prep/mcat/behavior/normative-and-non-normative-behavior/perspectives-on-deviance/", "id": "MSucylf4KhY", "title": "Perspectives on deviance: Differential association, labeling theory, and strain theory", "kind": "Video", "slug": "perspectives-on-deviance"}, {"path": "khan/test-prep/mcat/behavior/normative-and-non-normative-behavior/aspects-of-collective-behavior/", "id": "wOw7LWCW_Zk", "title": "Aspects of Collective Behavior: Fads, Mass Hysteria, and Riots", "kind": "Video", "slug": "aspects-of-collective-behavior"}], "in_knowledge_map": false, "description": "7B: Learn about how \"normal\" and \"deviant\" behavior is defined in today's society. This includes a discussion of the range of normal and abnormal behavior, common theories used to understand basic deviance, and discussion of some types of deviance that occur in groups.", "node_slug": "normative-and-non-normative-behavior", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/behavior/normative-and-non-normative-behavior", "extended_slug": "test-prep/mcat/behavior/normative-and-non-normative-behavior", "kind": "Topic", "slug": "normative-and-non-normative-behavior"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/learning-slug/", "id": "learning-slug", "hide": false, "title": "Learning", "child_data": [{"kind": "Exercise", "id": "x77cc6db9"}, {"kind": "Article", "id": "x3e6634e6"}, {"kind": "Video", "id": "x0777f6f7"}, {"kind": "Video", "id": "xe4f1f9af"}, {"kind": "Video", "id": "x08ac1446"}, {"kind": "Video", "id": "x1a3b20c0"}, {"kind": "Video", "id": "x032b0954"}, {"kind": "Video", "id": "x10f35d0a"}, {"kind": "Video", "id": "xecb71c7f"}, {"kind": "Video", "id": "xa60e0276"}, {"kind": "Video", "id": "x3a871e46"}, {"kind": "Video", "id": "xdc892b57"}, {"kind": "Video", "id": "x2bffbdc5"}], "children": [{"path": "khan/test-prep/mcat/behavior/learning-slug/learning-questions/", "id": "learning-questions", "title": "Learning questions", "description": "Learning questions", "slug": "learning-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/classical-conditioning-neutral-conditioned-and-unconditioned-stimuli-and-responses/", "id": "-6KzZKuQ1lk", "title": "Classical conditioning: Neutral, conditioned, and unconditioned stimuli and responses", "kind": "Video", "slug": "classical-conditioning-neutral-conditioned-and-unconditioned-stimuli-and-responses"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/classical-conditioning-extinction-spontaneous-recovery-generalization-discrimination/", "id": "qaOC_3KA3P8", "title": "Classical conditioning: Extinction, spontaneous recovery, generalization, discrimination", "kind": "Video", "slug": "classical-conditioning-extinction-spontaneous-recovery-generalization-discrimination"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/operant-conditioning-positive-and-negative-reinforcement-and-punishment/", "id": "ut1zmfolM9E", "title": "Operant conditioning: Positive-and-negative reinforcement and punishment", "kind": "Video", "slug": "operant-conditioning-positive-and-negative-reinforcement-and-punishment"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/operant-conditioning-shaping/", "id": "kexFINXbJo4", "title": "Operant conditioning: Shaping", "kind": "Video", "slug": "operant-conditioning-shaping"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/operant-conditioning-schedules-of-reinforcement/", "id": "6Ofbt16AJgg", "title": "Operant conditioning: Schedules of reinforcement", "kind": "Video", "slug": "operant-conditioning-schedules-of-reinforcement"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/operant-conditioning-innate-vs-learned-behaviors/", "id": "bGpw7NeXyBc", "title": "Operant conditioning: Innate vs learned behaviors", "kind": "Video", "slug": "operant-conditioning-innate-vs-learned-behaviors"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/operant-conditioning-escape-and-avoidance-learning/", "id": "fwzEbzgPszk", "title": "Operant conditioning: Escape and avoidance learning", "kind": "Video", "slug": "operant-conditioning-escape-and-avoidance-learning"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/observational-learning-bobo-doll-experiment-and-social-cognitive-theory/", "id": "HsQqb1E-bAU", "title": "Observational learning: Bobo doll experiment and social cognitive theory", "kind": "Video", "slug": "observational-learning-bobo-doll-experiment-and-social-cognitive-theory"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/long-term-potentiation-and-synaptic-plasticity/", "id": "uVQXZudZd5s", "title": "Long term potentiation and synaptic plasticity", "kind": "Video", "description": "Learn about synaptic plasticity and long-term potentiation, the physiological mechanism behind learning.", "slug": "long-term-potentiation-and-synaptic-plasticity"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/non-associative-learning/", "id": "ABUzqfD8vWg", "title": "Non associative learning", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "non-associative-learning"}, {"path": "khan/test-prep/mcat/behavior/learning-slug/biological-constraints-on-learning/", "id": "YdJdeOPNY4g", "title": "Biological constraints on learning", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "biological-constraints-on-learning"}], "in_knowledge_map": false, "description": "7C: This is the most \u201cmeta\u201d of all modules, in which you will learn about learning! Your environment has a huge impact on your future behavior, and your behavior itself has consequences on the environment. You will come to appreciate the mechanisms of classical and operant conditioning (and how you can apply these concepts to training your dog!). We will apply these to contemporary issues like the issue of violence in the media. As you go through this module, you will gain an understanding of how your brain retains new information.", "node_slug": "learning-slug", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/behavior/learning-slug", "extended_slug": "test-prep/mcat/behavior/learning-slug", "kind": "Topic", "slug": "learning-slug"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/", "id": "theories-of-attitude-and-behavior-change", "hide": false, "title": "Theories of attitude and behavior change", "child_data": [{"kind": "Exercise", "id": "x1c27c912"}, {"kind": "Video", "id": "x308e9e08"}, {"kind": "Video", "id": "x56305305"}, {"kind": "Video", "id": "xf7bb4631"}, {"kind": "Video", "id": "x801dc971"}, {"kind": "Video", "id": "xe7398c16"}, {"kind": "Video", "id": "x06f06e5a"}, {"kind": "Video", "id": "xc5e38981"}], "children": [{"path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/theories-of-attitude-and-behavior-change-questions/", "id": "theories-of-attitude-and-behavior-change-questions", "title": "Theories of attitude and behavior change questions", "description": "Questions pertaining to theories of attitude and behavior change", "slug": "theories-of-attitude-and-behavior-change-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/components-of-attitude/", "id": "cDq1_R-J51w", "title": "Components of attitudes", "kind": "Video", "slug": "components-of-attitude"}, {"path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/attitude-influences-behavior/", "id": "XJdE7awhJg0", "title": "Attitude influences behavior", "kind": "Video", "slug": "attitude-influences-behavior"}, {"path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/behavior-influences-attitude/", "id": "ayP43bc7kww", "title": "Behavior influences attitude", "kind": "Video", "slug": "behavior-influences-attitude"}, {"path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/persuasion-attitude-change-and-the-elaboration-likelihood-model/", "id": "o6oyCeYQWPE", "title": "Persuasion, attitude change, and the elaboration likelihood model", "kind": "Video", "slug": "persuasion-attitude-change-and-the-elaboration-likelihood-model"}, {"path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/reciprocal-determinism/", "id": "oyPNjYlboaw", "title": "Reciprocal determinism", "kind": "Video", "slug": "reciprocal-determinism"}, {"path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/personal-control-locus-of-control-learned-helplessness-and-the-tyranny-of-choice/", "id": "Vx1dnPMPhl0", "title": "Locus of control, learned helplessness, and the tyranny of choice", "kind": "Video", "slug": "personal-control-locus-of-control-learned-helplessness-and-the-tyranny-of-choice"}, {"path": "khan/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change/self-control/", "id": "uXdIdIjllEI", "title": "Self control", "kind": "Video", "slug": "self-control"}], "in_knowledge_map": false, "description": "7C: Although people can learn new behaviors and change their attitudes, psychological, environmental, and biological factors influence whether those changes will be short-term or long-term. Understanding how people learn new behaviors, change their attitudes, and the conditions that affect learning helps us understand behavior and our interactions with others.\n\nThe content in this category covers learning and theories of attitude and behavior change. This includes the elaboration likelihood model, theories of information processing, and social cognitive theory.", "node_slug": "theories-of-attitude-and-behavior-change", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/behavior/theories-of-attitude-and-behavior-change", "extended_slug": "test-prep/mcat/behavior/theories-of-attitude-and-behavior-change", "kind": "Topic", "slug": "theories-of-attitude-and-behavior-change"}], "in_knowledge_map": false, "description": "Foundational Concept 7: Biological, psychological, and socio-cultural factors influence behavior and behavior change.", "node_slug": "behavior", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/behavior", "extended_slug": "test-prep/mcat/behavior", "kind": "Topic", "slug": "behavior"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/individuals-and-society/", "id": "individuals-and-society", "hide": false, "title": "Individuals and society", "child_data": [{"kind": "Topic", "id": "xf7873dc1"}, {"kind": "Topic", "id": "xc39e5106"}, {"kind": "Topic", "id": "x466ad1a4"}, {"kind": "Topic", "id": "x5be56a4c"}, {"kind": "Topic", "id": "xd87d02d9"}, {"kind": "Topic", "id": "xbb7cdab4"}, {"kind": "Topic", "id": "x922182c6"}, {"kind": "Topic", "id": "x7ad05112"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/individuals-and-society/self-identity/", "id": "self-identity", "hide": false, "title": "Self-identity", "child_data": [{"kind": "Exercise", "id": "xd2a73b16"}, {"kind": "Video", "id": "x39a4d6a9"}, {"kind": "Video", "id": "x737bdeb3"}, {"kind": "Video", "id": "xbaa85660"}, {"kind": "Video", "id": "x80e40820"}, {"kind": "Video", "id": "x4a094a89"}, {"kind": "Video", "id": "x26c5e21b"}, {"kind": "Video", "id": "xfced61a6"}, {"kind": "Video", "id": "xd224b606"}, {"kind": "Video", "id": "x05207f51"}, {"kind": "Video", "id": "x44ad9b77"}], "children": [{"path": "khan/test-prep/mcat/individuals-and-society/self-identity/self-identity-questions/", "id": "self-identity-questions", "title": "Self identity questions", "description": "Self identity questions", "slug": "self-identity-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-identity/self-concept-self-identity-social-identity/", "id": "PaA0mLVQd3k", "title": "Self concept, self identity, and social identity", "kind": "Video", "slug": "self-concept-self-identity-social-identity"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-identity/self-esteem-self-efficacy-and-locus-of-control/", "id": "xcLKlPTG97k", "title": "Self esteem, self efficacy, and locus of control", "kind": "Video", "slug": "self-esteem-self-efficacy-and-locus-of-control"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-identity/overview-of-theories-of-development/", "id": "WMv8A9qg6jY", "title": "Overview of theories of development", "kind": "Video", "slug": "overview-of-theories-of-development"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-identity/freuds-psychosexual-development/", "id": "nG7yosFQHP4", "title": "Freud's psychosexual development", "kind": "Video", "slug": "freuds-psychosexual-development"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-identity/eriksons-psychosocial-development/", "id": "SIoKwUcmivk", "title": "Erikson's psychosocial development", "kind": "Video", "slug": "eriksons-psychosocial-development"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-identity/vygotsky-sociocultural-development/", "id": "-p_-0n2f35o", "title": "Vygotsky sociocultural development", "kind": "Video", "slug": "vygotsky-sociocultural-development"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-identity/kohlberg-moral-development/", "id": "Onkd8tChC2A", "title": "Kohlberg moral development", "kind": "Video", "slug": "kohlberg-moral-development"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-identity/social-influences/", "id": "DFD1oDbrSjM", "title": "Social influences", "kind": "Video", "slug": "social-influences"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-identity/george-herbert-mead-the-i-and-the-me/", "id": "oMNaQjtXSGc", "title": "George Herbert Mead- The I and the Me", "kind": "Video", "slug": "george-herbert-mead-the-i-and-the-me"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-identity/charles-cooley-looking-glass-self/", "id": "bU0BQUa11ek", "title": "Charles Cooley- Looking glass self", "kind": "Video", "slug": "charles-cooley-looking-glass-self"}], "in_knowledge_map": false, "description": "8A: Who exactly are we? How do we develop our morals and patterns of learning? What influences our behaviors in social situations? Physicians must have a keen understanding of their patients\u2019 definitions of themselves in order to treat holistically. Over the past few centuries, several notable psychologists - from Freud to Erikson to Vygotsky - have attempted to answer these grand question. In this module you will explore some of their ideas surrounding the concept of self-identity as we delve into the different phases of our life as we transform from infants to teenagers to full-fledged adults.", "node_slug": "self-identity", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/individuals-and-society/self-identity", "extended_slug": "test-prep/mcat/individuals-and-society/self-identity", "kind": "Topic", "slug": "self-identity"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/", "id": "perception-prejudice-and-bias", "hide": false, "title": "Perception, prejudice, and bias", "child_data": [{"kind": "Exercise", "id": "x4efa14d3"}, {"kind": "Video", "id": "x6712718c"}, {"kind": "Video", "id": "x1a8bb9e8"}, {"kind": "Video", "id": "x512d316c"}, {"kind": "Video", "id": "xdb670cac"}, {"kind": "Video", "id": "xbea6681c"}, {"kind": "Video", "id": "xc8cc84b0"}, {"kind": "Video", "id": "x6261dec9"}, {"kind": "Video", "id": "x922ef60b"}, {"kind": "Video", "id": "xe7d5cc92"}, {"kind": "Video", "id": "xdc57a6c4"}], "children": [{"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/perception-prejudice-and-bias-questions/", "id": "perception--prejudice--and-bias-questions", "title": "Perception, prejudice, and bias questions", "description": "Questions pertaining to perception, prejudice, and bias", "slug": "perception-prejudice-and-bias-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/attribution-theory-basic-covariation/", "id": "nB2ZRHS2RUE", "title": "Attribution Theory - Basic covariation", "kind": "Video", "slug": "attribution-theory-basic-covariation"}, {"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/attribution-theory-attribution-error-and-culture/", "id": "XYWFGJ2aYRU", "title": "Attribution theory - Attribution error and culture", "kind": "Video", "slug": "attribution-theory-attribution-error-and-culture"}, {"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/stereotypes-stereotype-threat-and-self-fulfilling-prophecies/", "id": "uK3M7RGqJFQ", "title": "Stereotypes stereotype threat and self fulfilling prophecies", "kind": "Video", "slug": "stereotypes-stereotype-threat-and-self-fulfilling-prophecies"}, {"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/emotion-and-cognition-in-prejudice/", "id": "_RrZggEhSJA", "title": "Emotion and cognition in prejudice", "kind": "Video", "slug": "emotion-and-cognition-in-prejudice"}, {"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige/", "id": "ug2FXcEurOo", "title": "Prejudice and discrimination based on race, ethnicity, power, social class, and prestige", "kind": "Video", "slug": "prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige"}, {"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/stigma-social-and-self/", "id": "_jz7yo7L3Z0", "title": "Stigma - Social and self", "kind": "Video", "slug": "stigma-social-and-self"}, {"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/social-perception-primacy-recency/", "id": "sILo6xYbsc0", "title": "Social perception - Primacy recency", "kind": "Video", "slug": "social-perception-primacy-recency"}, {"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/social-perception-the-halo-effect/", "id": "hx8bYUF30Gg", "title": "Social perception - The Halo Effect", "kind": "Video", "slug": "social-perception-the-halo-effect"}, {"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/social-perception-the-just-world-hypothesis/", "id": "B-J9IHGivfQ", "title": "Social perception - The Just World Hypothesis", "kind": "Video", "slug": "social-perception-the-just-world-hypothesis"}, {"path": "khan/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias/ethnocentrism-and-cultural-relativism-in-group-and-out-group/", "id": "HlXAeOnU520", "title": "Ethnocentrism and cultural relativism in group and out group", "kind": "Video", "slug": "ethnocentrism-and-cultural-relativism-in-group-and-out-group"}], "in_knowledge_map": false, "description": "Have you ever judged someone based on their appearance? Maybe they were tall and good looking and you assumed they were successful and intelligent. Here we will explore how and why we see the world the way we do as well as the implications of those perceptions.", "node_slug": "perception-prejudice-and-bias", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/individuals-and-society/perception-prejudice-and-bias", "extended_slug": "test-prep/mcat/individuals-and-society/perception-prejudice-and-bias", "kind": "Topic", "slug": "perception-prejudice-and-bias"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/individuals-and-society/attributing-behavior-to-persons-or-situations/", "id": "attributing-behavior-to-persons-or-situations", "hide": false, "title": "Attributing behavior to persons or situations", "child_data": [{"kind": "Exercise", "id": "xd2a73b16"}, {"kind": "Video", "id": "x737bdeb3"}, {"kind": "Video", "id": "x39a4d6a9"}, {"kind": "Video", "id": "xd224b606"}, {"kind": "Video", "id": "x06f06e5a"}], "children": [{"path": "khan/test-prep/mcat/individuals-and-society/attributing-behavior-to-persons-or-situations/self-identity-questions/", "id": "self-identity-questions", "title": "Self identity questions", "description": "Self identity questions", "slug": "self-identity-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/individuals-and-society/attributing-behavior-to-persons-or-situations/self-esteem-self-efficacy-and-locus-of-control/", "id": "xcLKlPTG97k", "title": "Self esteem, self efficacy, and locus of control", "kind": "Video", "slug": "self-esteem-self-efficacy-and-locus-of-control"}, {"path": "khan/test-prep/mcat/individuals-and-society/attributing-behavior-to-persons-or-situations/self-concept-self-identity-social-identity/", "id": "PaA0mLVQd3k", "title": "Self concept, self identity, and social identity", "kind": "Video", "slug": "self-concept-self-identity-social-identity"}, {"path": "khan/test-prep/mcat/individuals-and-society/attributing-behavior-to-persons-or-situations/social-influences/", "id": "DFD1oDbrSjM", "title": "Social influences", "kind": "Video", "slug": "social-influences"}, {"path": "khan/test-prep/mcat/individuals-and-society/attributing-behavior-to-persons-or-situations/personal-control-locus-of-control-learned-helplessness-and-the-tyranny-of-choice/", "id": "Vx1dnPMPhl0", "title": "Locus of control, learned helplessness, and the tyranny of choice", "kind": "Video", "slug": "personal-control-locus-of-control-learned-helplessness-and-the-tyranny-of-choice"}], "in_knowledge_map": false, "description": "", "node_slug": "attributing-behavior-to-persons-or-situations", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/individuals-and-society/attributing-behavior-to-persons-or-situations", "extended_slug": "test-prep/mcat/individuals-and-society/attributing-behavior-to-persons-or-situations", "kind": "Topic", "slug": "attributing-behavior-to-persons-or-situations"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/individuals-and-society/social-behavior/", "id": "social-behavior", "hide": false, "title": "Social behavior", "child_data": [{"kind": "Exercise", "id": "xa398b610"}, {"kind": "Video", "id": "x1d935375"}, {"kind": "Video", "id": "xa75abf59"}, {"kind": "Video", "id": "x9b528193"}, {"kind": "Video", "id": "xfb120484"}, {"kind": "Video", "id": "x953505b7"}, {"kind": "Video", "id": "x39e1caf8"}, {"kind": "Video", "id": "xd21c2b2a"}, {"kind": "Video", "id": "xd60c6996"}], "children": [{"path": "khan/test-prep/mcat/individuals-and-society/social-behavior/social-behavior-questions/", "id": "social-behavior-questions", "title": "Social behavior questions", "description": "Social behavior questions", "slug": "social-behavior-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-behavior/proximity-and-the-mere-exposure-effect/", "id": "tDi9BD__gRY", "title": "Proximity and the mere exposure effect", "kind": "Video", "slug": "proximity-and-the-mere-exposure-effect"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-behavior/physical-attraction/", "id": "nh_Ke1NXjsg", "title": "Physical attraction", "kind": "Video", "slug": "physical-attraction"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-behavior/similarity/", "id": "a8LzhzcEunY", "title": "Similarity", "kind": "Video", "slug": "similarity"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-behavior/harlow-monkey-experiments/", "id": "9wmvZH5lX_U", "title": "Harlow monkey experiments", "kind": "Video", "slug": "harlow-monkey-experiments"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-behavior/secure-and-insecure-attachment/", "id": "dtAyPy1OZCw", "title": "Secure and insecure attachment", "kind": "Video", "slug": "secure-and-insecure-attachment"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-behavior/aggression/", "id": "mk8w3bzEJYU", "title": "Aggression", "kind": "Video", "slug": "aggression"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-behavior/altruism/", "id": "ZgJHEp7XwAs", "title": "Altruism", "kind": "Video", "slug": "altruism"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-behavior/social-support/", "id": "gZMvA2Apg2A", "title": "Social support", "kind": "Video", "slug": "social-support"}], "in_knowledge_map": false, "description": "8C: Who are we attracted to and why? Why do some people behave aggressively and others altruistically? These are questions we can begin to answer through an understanding of social behavior. This tutorial will help you answer these questions as well as give you insight into the basics of attachment and the relationships we have with our parents and those around us as we explore some of the aspects that govern our interactions with other human beings.", "node_slug": "social-behavior", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/individuals-and-society/social-behavior", "extended_slug": "test-prep/mcat/individuals-and-society/social-behavior", "kind": "Topic", "slug": "social-behavior"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/individuals-and-society/social-interactions/", "id": "social-interactions", "hide": false, "title": "Social interactions", "child_data": [{"kind": "Exercise", "id": "x64e775ee"}, {"kind": "Video", "id": "xfaecc056"}, {"kind": "Video", "id": "x2392a63c"}, {"kind": "Video", "id": "xd7393454"}, {"kind": "Video", "id": "xdc57a6c4"}, {"kind": "Video", "id": "x89490d30"}, {"kind": "Video", "id": "xcd248034"}, {"kind": "Video", "id": "x39e1caf8"}, {"kind": "Video", "id": "xfb120484"}, {"kind": "Video", "id": "xd21c2b2a"}, {"kind": "Video", "id": "x7e7e2fd4"}, {"kind": "Video", "id": "x70bbd9af"}, {"kind": "Video", "id": "xbea6681c"}, {"kind": "Video", "id": "x79890845"}, {"kind": "Video", "id": "x257032ca"}, {"kind": "Video", "id": "xd60c6996"}], "children": [{"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/social-interactions-questions-1/", "id": "social-interactions-questions-1", "title": "Social interactions questions 1", "description": "Social interactions questions 1", "slug": "social-interactions-questions-1", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/status/", "id": "dt-2AanNQrc", "title": "Status", "kind": "Video", "slug": "status"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/role-strain-and-role-conflict/", "id": "TktF6unUlso", "title": "Role strain and role conflict", "kind": "Video", "slug": "role-strain-and-role-conflict"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/primary-and-secondary-groups/", "id": "KAJVMnXad7g", "title": "Primary and secondary groups", "kind": "Video", "slug": "primary-and-secondary-groups"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/ethnocentrism-and-cultural-relativism-in-group-and-out-group/", "id": "HlXAeOnU520", "title": "Ethnocentrism and cultural relativism in group and out group", "kind": "Video", "slug": "ethnocentrism-and-cultural-relativism-in-group-and-out-group"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/dramaturgical-approach/", "id": "UH7eOrP64q4", "title": "Dramaturgical approach", "kind": "Video", "slug": "dramaturgical-approach"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/impression-management/", "id": "JDMkWZQjaE8", "title": "Impression management", "kind": "Video", "slug": "impression-management"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/aggression/", "id": "mk8w3bzEJYU", "title": "Aggression", "kind": "Video", "slug": "aggression"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/harlow-monkey-experiments/", "id": "9wmvZH5lX_U", "title": "Harlow monkey experiments", "kind": "Video", "slug": "harlow-monkey-experiments"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/altruism/", "id": "ZgJHEp7XwAs", "title": "Altruism", "kind": "Video", "slug": "altruism"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/discrimination-individual-vs-institutional/", "id": "2eTTJMrINNo", "title": "Discrimination individual vs institutional", "kind": "Video", "slug": "discrimination-individual-vs-institutional"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/prejudice-vs-discrimination/", "id": "Lto6oQcGF_8", "title": "Prejudice vs discrimination", "kind": "Video", "slug": "prejudice-vs-discrimination"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige/", "id": "ug2FXcEurOo", "title": "Prejudice and discrimination based on race, ethnicity, power, social class, and prestige", "kind": "Video", "slug": "prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/organizations-and-bureaucratization/", "id": "LSu1HGjPFm4", "title": "Organizations and bureaucratization", "kind": "Video", "slug": "organizations-and-bureaucratization"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/characteristics-of-an-ideal-bureaucracy/", "id": "2BIFnNT69yU", "title": "Characteristics of an ideal bureaucracy", "kind": "Video", "slug": "characteristics-of-an-ideal-bureaucracy"}, {"path": "khan/test-prep/mcat/individuals-and-society/social-interactions/social-support/", "id": "gZMvA2Apg2A", "title": "Social support", "kind": "Video", "slug": "social-support"}], "in_knowledge_map": false, "description": "Here we will learn why people look at you funny when you do the worm in the middle of the hallway at school. Just kidding -- but you will learn about the biological influences and social theories which explain why we interact with others and the world around us the way we do.", "node_slug": "social-interactions", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/individuals-and-society/social-interactions", "extended_slug": "test-prep/mcat/individuals-and-society/social-interactions", "kind": "Topic", "slug": "social-interactions"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/individuals-and-society/self-presentation-and-interacting-with-others/", "id": "self-presentation-and-interacting-with-others", "hide": false, "title": "Self-presentation and interacting with others", "child_data": [{"kind": "Exercise", "id": "xf1fb33f2"}, {"kind": "Video", "id": "x44ad9b77"}, {"kind": "Video", "id": "x05207f51"}, {"kind": "Video", "id": "xe78ca21a"}], "children": [{"path": "khan/test-prep/mcat/individuals-and-society/self-presentation-and-interacting-with-others/social-interactions-questions-2/", "id": "social-interactions-questions-2", "title": "Social interactions questions 2", "description": "Social interactions questions 2", "slug": "social-interactions-questions-2", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-presentation-and-interacting-with-others/charles-cooley-looking-glass-self/", "id": "bU0BQUa11ek", "title": "Charles Cooley- Looking glass self", "kind": "Video", "slug": "charles-cooley-looking-glass-self"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-presentation-and-interacting-with-others/george-herbert-mead-the-i-and-the-me/", "id": "oMNaQjtXSGc", "title": "George Herbert Mead- The I and the Me", "kind": "Video", "slug": "george-herbert-mead-the-i-and-the-me"}, {"path": "khan/test-prep/mcat/individuals-and-society/self-presentation-and-interacting-with-others/three-components-of-emotion-and-universal-emotions/", "id": "IZgM4NPN4eU", "title": "Three components of emotion and universal emotions", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "three-components-of-emotion-and-universal-emotions"}], "in_knowledge_map": false, "description": "8C:", "node_slug": "self-presentation-and-interacting-with-others", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/individuals-and-society/self-presentation-and-interacting-with-others", "extended_slug": "test-prep/mcat/individuals-and-society/self-presentation-and-interacting-with-others", "kind": "Topic", "slug": "self-presentation-and-interacting-with-others"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/", "id": "biological-explanations-of-social-behavior-in-animals", "hide": false, "title": "Biological explanations of social behavior in animals", "child_data": [{"kind": "Exercise", "id": "x2601cfb9"}, {"kind": "Video", "id": "xda926539"}, {"kind": "Video", "id": "x6ae75632"}, {"kind": "Video", "id": "x694e728f"}, {"kind": "Video", "id": "x2780eb77"}, {"kind": "Video", "id": "x8501eed8"}], "children": [{"path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/biological-explanations-of-social-behavior-in-animals-questions/", "id": "biological-explanations-of-social-behavior-in-animals-questions", "title": "Biological explanations of social behavior in animals questions", "description": "Questions pertaining to the biological explanation of social behavior in animals", "slug": "biological-explanations-of-social-behavior-in-animals-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/animal-behavior-foraging/", "id": "OrCoshLAOiQ", "title": "Animal behavior: foraging", "kind": "Video", "slug": "animal-behavior-foraging"}, {"path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/animal-communication/", "id": "1kbZ1JAoi5o", "title": "Animal communication", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "animal-communication"}, {"path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/types-of-animal-communication/", "id": "S3X-NkvE49o", "title": "Types of animal communication", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "types-of-animal-communication"}, {"path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/mating-behavior-and-inclusive-fitness/", "id": "bK85aZPR3UY", "title": "Mating behavior and inclusive fitness", "kind": "Video", "slug": "mating-behavior-and-inclusive-fitness"}, {"path": "khan/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals/evolutionary-game-theory/", "id": "YMzNkNoFzG4", "title": "Evolutionary game theory", "kind": "Video", "slug": "evolutionary-game-theory"}], "in_knowledge_map": false, "description": "Nature vs. nurture: are animal behaviors taught or genetically passed down from generation to generation? Here we explore how social behaviors, like genuinely caring about the well being of those in your community, are more \u201cnature\u201d than \u201cnurture.\u201d", "node_slug": "biological-explanations-of-social-behavior-in-animals", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals", "extended_slug": "test-prep/mcat/individuals-and-society/biological-explanations-of-social-behavior-in-animals", "kind": "Topic", "slug": "biological-explanations-of-social-behavior-in-animals"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/individuals-and-society/discrimination/", "id": "discrimination", "hide": false, "title": "Discrimination", "child_data": [{"kind": "Exercise", "id": "x70e665b3"}, {"kind": "Article", "id": "x5a1b4cee"}, {"kind": "Video", "id": "x7e7e2fd4"}, {"kind": "Video", "id": "xbea6681c"}, {"kind": "Video", "id": "x85e7995a"}], "children": [{"path": "khan/test-prep/mcat/individuals-and-society/discrimination/discrimination-questions/", "id": "discrimination-questions", "title": "Discrimination questions", "description": "Discrimination questions", "slug": "discrimination-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/individuals-and-society/discrimination/discrimination-individual-vs-institutional/", "id": "2eTTJMrINNo", "title": "Discrimination individual vs institutional", "kind": "Video", "slug": "discrimination-individual-vs-institutional"}, {"path": "khan/test-prep/mcat/individuals-and-society/discrimination/prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige/", "id": "ug2FXcEurOo", "title": "Prejudice and discrimination based on race, ethnicity, power, social class, and prestige", "kind": "Video", "slug": "prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige"}, {"path": "khan/test-prep/mcat/individuals-and-society/discrimination/stereotypes-stereotype-threat-and-self-fulfilling-prophecy/", "id": "XF5r_aWrHNg", "title": "Stereotypes stereotype threat, and self fulfilling prophecy", "kind": "Video", "slug": "stereotypes-stereotype-threat-and-self-fulfilling-prophecy"}], "in_knowledge_map": false, "description": "Why is it that some traits like skin color, religion, or cultural values have more meaning than others like eye color or personality? Here we explore how discrimination begins as a stereotype and can escalate into behaviors that can negatively influence whole communities of people.", "node_slug": "discrimination", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/individuals-and-society/discrimination", "extended_slug": "test-prep/mcat/individuals-and-society/discrimination", "kind": "Topic", "slug": "discrimination"}], "in_knowledge_map": false, "description": "Foundational Concept 8: Psychological, socio-cultural, and biological factors influence the way we think about ourselves and others.", "node_slug": "individuals-and-society", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/individuals-and-society", "extended_slug": "test-prep/mcat/individuals-and-society", "kind": "Topic", "slug": "individuals-and-society"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/society-and-culture/", "id": "society-and-culture", "hide": false, "title": "Society and culture", "child_data": [{"kind": "Topic", "id": "x42de2b74"}, {"kind": "Topic", "id": "x0a1bfc96"}, {"kind": "Topic", "id": "x60c7e12f"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/society-and-culture/social-structures/", "id": "social-structures", "hide": false, "title": "Social structures", "child_data": [{"kind": "Exercise", "id": "x6a78b862"}, {"kind": "Video", "id": "xadfabfad"}, {"kind": "Video", "id": "xe303d24f"}, {"kind": "Video", "id": "xb7a8c5b9"}, {"kind": "Video", "id": "x6dcd546e"}, {"kind": "Video", "id": "xa989056e"}, {"kind": "Video", "id": "x9142bef1"}, {"kind": "Video", "id": "x16b3cdcc"}, {"kind": "Video", "id": "xfeb2aec4"}, {"kind": "Video", "id": "x7ccbf665"}, {"kind": "Video", "id": "xa3aa5e8c"}, {"kind": "Video", "id": "x58b50eab"}, {"kind": "Video", "id": "x4ebd796a"}, {"kind": "Video", "id": "xd7b95c3a"}, {"kind": "Article", "id": "x66b36d81"}], "children": [{"path": "khan/test-prep/mcat/society-and-culture/social-structures/understanding-social-structures-questions/", "id": "understanding-social-structures-questions", "title": "Understanding social structures questions", "description": "Understanding social structures questions", "slug": "understanding-social-structures-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/macrosociology-vs-microsociology/", "id": "-BVeSykcQeE", "title": "Macrosociology vs microsociology", "kind": "Video", "slug": "macrosociology-vs-microsociology"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/institutions/", "id": "9KR1bad76qg", "title": "Social institutions", "kind": "Video", "description": "Institutions are structures of society that fulfill the needs of the society. Not only are they essential to the society's needs, they also help to build the society itself. By Sydney Brown.", "slug": "institutions"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/institutions-education-family-religion/", "id": "vStLGBTKMBQ", "title": "Social institutions - education, family, and religion", "kind": "Video", "slug": "institutions-education-family-religion"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/institutions-government-economy-and-health-and-medicine/", "id": "L72h7bk6HZs", "title": "Social institutions - government, economy, health and medicine", "kind": "Video", "slug": "institutions-government-economy-and-health-and-medicine"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/functionalism/", "id": "-83vVeSC2_g", "title": "Functionalism", "kind": "Video", "description": "Functionalism is a theory of society that focuses on the structures that create the society and on how the society is able to remain stable. By Sydney Brown.", "slug": "functionalism"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/conflict-theory/", "id": "LPYTndFFTko", "title": "Conflict theory", "kind": "Video", "description": "Conflict theory observes how the unrest in a society will cause it to change and evolve to relieve the tension. By Sydney Brown.", "slug": "conflict-theory"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/social-constructionism/", "id": "5U2XAJNazik", "title": "Social constructionism", "kind": "Video", "description": "Social constructionism observes how the interactions of individuals with their society and the world around them gives meaning to otherwise worthless things and creates the reality of the society.\u00a0 By Sydney Brown.", "slug": "social-constructionism"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/symbolic-interactionism/", "id": "Ux2E6uhEVk0", "title": "Symbolic interactionism", "kind": "Video", "slug": "symbolic-interactionism"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/feminist-theory/", "id": "LHPOLSywdi0", "title": "Feminist theory", "kind": "Video", "slug": "feminist-theory"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/rational-choice-exchange/", "id": "C6RFvROskM8", "title": "Rational choice-exchange theory", "kind": "Video", "slug": "rational-choice-exchange"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/social-theories-overview/", "id": "KpaLchFpJZ8", "title": "Social theories overview (part 1)", "kind": "Video", "description": "An overview of functionalism, conflict theory, social constructionism, and symbolic interactionism to help you keep them all straight.\u00a0 By Sydney Brown.", "slug": "social-theories-overview"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/social-theories-overview-part-2/", "id": "q5ArmxIXU4s", "title": "Social theories overview (part 2)", "kind": "Video", "slug": "social-theories-overview-part-2"}, {"path": "khan/test-prep/mcat/society-and-culture/social-structures/relating-social-theories-to-medicine/", "id": "6c8BCZd6GXU", "title": "Relating social theories to medicine", "kind": "Video", "slug": "relating-social-theories-to-medicine"}], "in_knowledge_map": false, "description": "9A: Any group of people involved in interpersonal relationship is a society. How do we humans all live together in such highly populated cities? How does a society change? You will learn about some famous sociological theories which aim to address these important questions, from conflict theory and feminist theory to social constructionism.", "node_slug": "social-structures", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/society-and-culture/social-structures", "extended_slug": "test-prep/mcat/society-and-culture/social-structures", "kind": "Topic", "slug": "social-structures"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/society-and-culture/demographics/", "id": "demographics", "hide": false, "title": "Demographics", "child_data": [{"kind": "Exercise", "id": "x228517b1"}, {"kind": "Video", "id": "x5e481080"}, {"kind": "Video", "id": "x6e7f71c1"}, {"kind": "Video", "id": "xe800097d"}, {"kind": "Video", "id": "xb04a0886"}, {"kind": "Video", "id": "xe79bdb72"}, {"kind": "Video", "id": "x94f81d79"}, {"kind": "Article", "id": "xe5d3d86d"}, {"kind": "Video", "id": "xc755bf87"}, {"kind": "Video", "id": "xfd9bf349"}, {"kind": "Video", "id": "x2d80b41e"}, {"kind": "Video", "id": "xb8664afb"}, {"kind": "Video", "id": "xcfcbf45f"}, {"kind": "Video", "id": "x56673ebf"}], "children": [{"path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-characteristics-and-processes/", "id": "demographic-characteristics-and-processes", "title": "Demographic characteristics and processes", "description": "Demographic characteristics and processes - free-standing questions", "slug": "demographic-characteristics-and-processes", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-structure-of-society-age/", "id": "e_tE84565Co", "title": "Demographic structure of society - age", "kind": "Video", "slug": "demographic-structure-of-society-age"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-structure-of-society-race-and-ethnicity/", "id": "4WIiConeatM", "title": "Demographic structure of society - race and ethnicity", "kind": "Video", "slug": "demographic-structure-of-society-race-and-ethnicity"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-structure-of-society-immigration/", "id": "unNvQXIU1q8", "title": "Demographic structure of society - immigration", "kind": "Video", "slug": "demographic-structure-of-society-immigration"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-structure-of-society-sex-gender-and-sexual-orientation/", "id": "Hkmsu9Tl7NE", "title": "Demographic structure of society - sex, gender, and sexual orientation", "kind": "Video", "slug": "demographic-structure-of-society-sex-gender-and-sexual-orientation"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-structure-of-society-overview/", "id": "72FUrRxXCpQ", "title": "Demographic structure of society overview", "kind": "Video", "slug": "demographic-structure-of-society-overview"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/urbanization/", "id": "DwcW12J1FFA", "title": "Urbanization", "kind": "Video", "slug": "urbanization"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/population-dynamics/", "id": "4CAQN-nc8Ac", "title": "Population dynamics", "kind": "Video", "slug": "population-dynamics"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/demographic-transition/", "id": "6P2bsPWCRvM", "title": "Demographic transition", "kind": "Video", "slug": "demographic-transition"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/globalization-theories/", "id": "lQIVIYCZ4ec", "title": "Globalization theories", "kind": "Video", "slug": "globalization-theories"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/globalization-trade-and-transnational-corporations/", "id": "GmomzubjO1I", "title": "Globalization- trade and transnational corporations", "kind": "Video", "slug": "globalization-trade-and-transnational-corporations"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/social-movements/", "id": "y7YPTD7QwR4", "title": "Social movements", "kind": "Video", "slug": "social-movements"}, {"path": "khan/test-prep/mcat/society-and-culture/demographics/overview-of-demographics/", "id": "SAZUdVg0ygg", "title": "Overview of demographics", "kind": "Video", "slug": "overview-of-demographics"}], "in_knowledge_map": false, "description": "9B: There are many different ways of looking at a population. You can separate the population into different groups to view statistics. For instance, one may want to compare the efficacy of a drug in treating diabetics with congestive heart failure compared to diabetics without heart failure - these each form two separate populations of patients. In this module, you will come to see how different populations interact and change over time.", "node_slug": "demographics", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/society-and-culture/demographics", "extended_slug": "test-prep/mcat/society-and-culture/demographics", "kind": "Topic", "slug": "demographics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/society-and-culture/culture/", "id": "culture", "hide": false, "title": "Culture", "child_data": [{"kind": "Article", "id": "xcbe6c1dc"}, {"kind": "Exercise", "id": "x7c63009f"}, {"kind": "Video", "id": "x48930e2a"}, {"kind": "Video", "id": "x30af1a07"}, {"kind": "Video", "id": "x9d01a786"}, {"kind": "Video", "id": "xf671d0e3"}, {"kind": "Video", "id": "x522d0798"}, {"kind": "Video", "id": "xa0aaba66"}, {"kind": "Video", "id": "x245715c1"}, {"kind": "Video", "id": "xe4472946"}], "children": [{"path": "khan/test-prep/mcat/society-and-culture/culture/culture-questions/", "id": "culture-questions", "title": "Culture questions", "description": "Questions pertaining to culture", "slug": "culture-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/society-and-culture/culture/culture-and-society/", "id": "QQsBM1dZLO4", "title": "Culture and society", "kind": "Video", "slug": "culture-and-society"}, {"path": "khan/test-prep/mcat/society-and-culture/culture/overview-of-culture/", "id": "Vo6W4kDv0cA", "title": "Overview of culture", "kind": "Video", "slug": "overview-of-culture"}, {"path": "khan/test-prep/mcat/society-and-culture/culture/subculture-vs-counterculture/", "id": "4qoE3OVy4Vo", "title": "Subculture vs counterculture", "kind": "Video", "slug": "subculture-vs-counterculture"}, {"path": "khan/test-prep/mcat/society-and-culture/culture/jim-goes-to-college-subculture/", "id": "SyWWgn5YEZo", "title": "Jim goes to college subculture", "kind": "Video", "slug": "jim-goes-to-college-subculture"}, {"path": "khan/test-prep/mcat/society-and-culture/culture/culture-lag-and-culture-shock/", "id": "rm4pzNYDHAI", "title": "Culture lag and culture shock", "kind": "Video", "slug": "culture-lag-and-culture-shock"}, {"path": "khan/test-prep/mcat/society-and-culture/culture/diffusion/", "id": "W3_A_A0XBiY", "title": "Diffusion", "kind": "Video", "slug": "diffusion"}, {"path": "khan/test-prep/mcat/society-and-culture/culture/mass-media/", "id": "5RRyX9mI5Lw", "title": "Mass media", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "mass-media"}, {"path": "khan/test-prep/mcat/society-and-culture/culture/evolution-and-human-culture/", "id": "xlmruDxY48Y", "title": "Evolution and human culture", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "evolution-and-human-culture"}], "in_knowledge_map": false, "description": "Why is it that in America it is acceptable to eat a quarter pound hamburger and guzzle down a large soft drink yet it is weird to eat a grasshopper? The answer is because of our culture. Culture varies across the world and provides rules for a society of people to live by. Here we explore what culture is and how it shapes our human experience.", "node_slug": "culture", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/society-and-culture/culture", "extended_slug": "test-prep/mcat/society-and-culture/culture", "kind": "Topic", "slug": "culture"}], "in_knowledge_map": false, "description": "Foundational Concept 9: Cultural and social differences influence well-being.", "node_slug": "society-and-culture", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/society-and-culture", "extended_slug": "test-prep/mcat/society-and-culture", "kind": "Topic", "slug": "society-and-culture"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/mcat/social-inequality/", "id": "social-inequality", "hide": false, "title": "Social inequality", "child_data": [{"kind": "Topic", "id": "x50fe6e3a"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/mcat/social-inequality/social-class/", "id": "social-class", "hide": false, "title": "Social inequality", "child_data": [{"kind": "Exercise", "id": "x4fb5983e"}, {"kind": "Video", "id": "xc363c70f"}, {"kind": "Video", "id": "x94f34581"}, {"kind": "Video", "id": "x48f77aa9"}, {"kind": "Video", "id": "x270bbed1"}, {"kind": "Video", "id": "x0175c655"}, {"kind": "Video", "id": "xbbd04c40"}, {"kind": "Video", "id": "x8b670b80"}, {"kind": "Video", "id": "x5f8ffd05"}, {"kind": "Video", "id": "x3dcd8071"}, {"kind": "Video", "id": "xbea6681c"}, {"kind": "Video", "id": "x3ec86776"}, {"kind": "Video", "id": "xf6376212"}, {"kind": "Video", "id": "xdcf1cec7"}], "children": [{"path": "khan/test-prep/mcat/social-inequality/social-class/social-inequality-questions/", "id": "social-inequality-questions", "title": "Social inequality questions", "description": "Questions pertaining to social inequality", "slug": "social-inequality-questions", "kind": "Exercise"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/overview-of-social-inequality/", "id": "JYxspCbwZVs", "title": "Overview of social inequality", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "overview-of-social-inequality"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/upward-and-downward-mobility-meritocracy/", "id": "khRX1Oo93AY", "title": "Upward and downward mobility, meritocracy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "upward-and-downward-mobility-meritocracy"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/intergenerational-and-intragenerational-mobility-social-mobility/", "id": "fAUUHCZMJH8", "title": "Intergenerational and intragenerational mobility social mobility", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "intergenerational-and-intragenerational-mobility-social-mobility"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/absolute-and-relative-poverty/", "id": "IjbJZ5jspzE", "title": "Absolute and relative poverty", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "absolute-and-relative-poverty"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/social-reproduction/", "id": "ShJqEBcyiBg", "title": "Social reproduction", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "social-reproduction"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/social-exclusion-segregation-and-social-isolation/", "id": "eejmYz0O3YE", "title": "Social exclusion (segregation and social isolation)", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "social-exclusion-segregation-and-social-isolation"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/environmental-justice/", "id": "0L2xCwD5RNI", "title": "Environmental justice", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "environmental-justice"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/residential-segregation/", "id": "PYZhVX6rr08", "title": "Residential segregation", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "residential-segregation"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/global-inequality/", "id": "KBsOwZRKzcE", "title": "Global inequality", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "global-inequality"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige/", "id": "ug2FXcEurOo", "title": "Prejudice and discrimination based on race, ethnicity, power, social class, and prestige", "kind": "Video", "slug": "prejudice-and-discrimination-based-on-race-ethnicity-power-social-class-and-prestige"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/health-and-healthcare-disparities-in-the-us/", "id": "7qAld9bGwlA", "title": "Health and healthcare disparities in the US", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "health-and-healthcare-disparities-in-the-us"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/intersectionality/", "id": "n2kUpKP18z8", "title": "Intersectionality", "kind": "Video", "slug": "intersectionality"}, {"path": "khan/test-prep/mcat/social-inequality/social-class/class-consciousness-and-false-consciousness/", "id": "amv4Ed15YMY", "title": "Class consciousness and false consciousness", "kind": "Video", "slug": "class-consciousness-and-false-consciousness"}], "in_knowledge_map": false, "description": "10A: The key here is to focus on a broad understanding of social class, including theories on how it's organized, how people move between classes, and what leads to poverty.", "node_slug": "social-class", "render_type": "Tutorial", "topic_page_url": "/test-prep/mcat/social-inequality/social-class", "extended_slug": "test-prep/mcat/social-inequality/social-class", "kind": "Topic", "slug": "social-class"}], "in_knowledge_map": false, "description": "Foundational concept 10: Social stratification and access to resources influence well-being.", "node_slug": "social-inequality", "render_type": "Topic", "topic_page_url": "/test-prep/mcat/social-inequality", "extended_slug": "test-prep/mcat/social-inequality", "kind": "Topic", "slug": "social-inequality"}], "in_knowledge_map": false, "description": "This collection is being developed for the revised MCAT\u00ae exam that will first be administered in April 2015. The collection contains more than 1000 videos and 2800 practice questions. Content will be added to the collection through 2015. All content in this collection has been created under the direction of the Khan Academy and has been reviewed under the direction of the AAMC (Association of American Medical Colleges). All materials are categorized according to the pre-health competencies tested by the new MCAT exam; however, the content in this collection is not intended to prescribe a program of study for the new MCAT exam. These videos, questions, and articles are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/by-nc-sa/3.0/us/). The content is also included in the Pre-health Collection within MedEdPORTAL\u2019s iCollaborative sponsored by the AAMC: www.mededportal.org/pre-health \n\n*MCAT\u00ae is a program of the AAMC and related trademarks owned by the Association include Medical College Admission Test, MCAT, and MCAT2015. For more information about the MCAT exam, visit www.aamc.org/mcat.", "node_slug": "mcat", "render_type": "Subject", "topic_page_url": "/test-prep/mcat", "extended_slug": "test-prep/mcat", "kind": "Topic", "slug": "mcat"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/nclex-rn/", "id": "nclex-rn", "hide": false, "title": "NCLEX-RN", "child_data": [{"kind": "Topic", "id": "xe1d768d0"}, {"kind": "Topic", "id": "x23896294"}, {"kind": "Topic", "id": "xee2cdbc6"}, {"kind": "Topic", "id": "x2169aaf4"}, {"kind": "Topic", "id": "x5c6eec6c"}, {"kind": "Topic", "id": "xcd876c69"}, {"kind": "Topic", "id": "x1b75a26c"}, {"kind": "Topic", "id": "x27c57698"}, {"kind": "Topic", "id": "x5757eba6"}, {"kind": "Topic", "id": "x0387b39d"}, {"kind": "Topic", "id": "x53dd26d4"}, {"kind": "Topic", "id": "x171f3f90"}, {"kind": "Topic", "id": "xc71f254f"}, {"kind": "Topic", "id": "xef1c7e6c"}, {"kind": "Topic", "id": "x34eebc2e"}, {"kind": "Topic", "id": "xebb88c26"}, {"kind": "Topic", "id": "x768a2fe5"}, {"kind": "Topic", "id": "xaf7ed241"}, {"kind": "Topic", "id": "x793ec0cd"}, {"kind": "Topic", "id": "x55e9cb9a"}, {"kind": "Topic", "id": "x30548204"}, {"kind": "Topic", "id": "x83cbc720"}], "children": [{"icon_src": "", "contains": ["Topic", "Exercise"], "path": "khan/test-prep/nclex-rn/nclex-practice-questions/", "id": "nclex-practice-questions", "hide": false, "title": "NCLEX-RN practice questions", "child_data": [{"kind": "Topic", "id": "x00bc9109"}], "children": [{"icon_src": "", "contains": ["Exercise"], "path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/", "id": "nclex-rn-questions", "hide": false, "title": "NCLEX-RN questions", "child_data": [{"kind": "Exercise", "id": "x25127b3b"}, {"kind": "Exercise", "id": "xef285cb3"}, {"kind": "Exercise", "id": "x3948972d"}, {"kind": "Exercise", "id": "xe1df485d"}, {"kind": "Exercise", "id": "x53c27d83"}, {"kind": "Exercise", "id": "xfad14f02"}, {"kind": "Exercise", "id": "x1c805f43"}, {"kind": "Exercise", "id": "xcaa6cd1a"}, {"kind": "Exercise", "id": "x75e295e2"}, {"kind": "Exercise", "id": "xb33d365f"}, {"kind": "Exercise", "id": "x0ff3f641"}, {"kind": "Exercise", "id": "x144ec0fa"}, {"kind": "Exercise", "id": "x3bcc6efc"}, {"kind": "Exercise", "id": "x28d6db98"}, {"kind": "Exercise", "id": "xb78bf343"}, {"kind": "Exercise", "id": "xcfce869f"}, {"kind": "Exercise", "id": "x78d0f6d8"}, {"kind": "Exercise", "id": "xfcd36704"}, {"kind": "Exercise", "id": "x56328cd8"}, {"kind": "Exercise", "id": "x335cd0ce"}, {"kind": "Exercise", "id": "x13e3d319"}, {"kind": "Exercise", "id": "x3b58d572"}, {"kind": "Exercise", "id": "xceffca1d"}, {"kind": "Exercise", "id": "x156a05e3"}, {"kind": "Exercise", "id": "x6049e036"}, {"kind": "Exercise", "id": "x5aed2ee1"}, {"kind": "Exercise", "id": "xd0a61ace"}, {"kind": "Exercise", "id": "x24bc2950"}, {"kind": "Exercise", "id": "xc2499a91"}, {"kind": "Exercise", "id": "xcf31ce82"}, {"kind": "Exercise", "id": "x92515036"}, {"kind": "Exercise", "id": "x83b26638"}, {"kind": "Exercise", "id": "xbe08f2bc"}, {"kind": "Exercise", "id": "xa9108ef3"}, {"kind": "Exercise", "id": "x3148f2eb"}, {"kind": "Exercise", "id": "x9b80b331"}, {"kind": "Exercise", "id": "x15c6ab42"}, {"kind": "Exercise", "id": "x4559c8b7"}, {"kind": "Exercise", "id": "xc5096330"}, {"kind": "Exercise", "id": "x5c4f2e74"}, {"kind": "Exercise", "id": "x2f9ac494"}, {"kind": "Exercise", "id": "x6ab4d3c2"}, {"kind": "Exercise", "id": "x085e91f5"}, {"kind": "Exercise", "id": "x44b78214"}, {"kind": "Exercise", "id": "x6623bc7d"}, {"kind": "Exercise", "id": "x0cbfc79e"}, {"kind": "Exercise", "id": "x8e4f7b4b"}, {"kind": "Exercise", "id": "x031cdebc"}, {"kind": "Exercise", "id": "xd941c082"}, {"kind": "Exercise", "id": "x587d0e4a"}, {"kind": "Exercise", "id": "x5c23385e"}, {"kind": "Exercise", "id": "x589b029c"}, {"kind": "Exercise", "id": "x7ee510f7"}, {"kind": "Exercise", "id": "xc3b52bcd"}, {"kind": "Exercise", "id": "xb21d6ccc"}, {"kind": "Exercise", "id": "x1afad136"}, {"kind": "Exercise", "id": "xb840a93c"}, {"kind": "Exercise", "id": "xf95dfb1c"}, {"kind": "Exercise", "id": "xcc319696"}, {"kind": "Exercise", "id": "xaaea9321"}, {"kind": "Exercise", "id": "x66e03001"}, {"kind": "Exercise", "id": "x4a90b6cd"}, {"kind": "Exercise", "id": "xd56cb9d0"}, {"kind": "Exercise", "id": "x70cc6b6b"}, {"kind": "Exercise", "id": "xeafccc7f"}, {"kind": "Exercise", "id": "xcbfec636"}, {"kind": "Exercise", "id": "x575b4888"}, {"kind": "Exercise", "id": "x1c588c5d"}, {"kind": "Exercise", "id": "x3f553c53"}, {"kind": "Exercise", "id": "xdbd859e7"}, {"kind": "Exercise", "id": "xb3615278"}, {"kind": "Exercise", "id": "x5b6adfa7"}, {"kind": "Exercise", "id": "x745709e5"}, {"kind": "Exercise", "id": "xdcb57e09"}, {"kind": "Exercise", "id": "x086034de"}, {"kind": "Exercise", "id": "x9dca70da"}, {"kind": "Exercise", "id": "xe8238391"}, {"kind": "Exercise", "id": "x8ace9dc3"}, {"kind": "Exercise", "id": "x982efd06"}, {"kind": "Exercise", "id": "xa64e9c63"}, {"kind": "Exercise", "id": "x0b664b13"}, {"kind": "Exercise", "id": "x0d311d8b"}, {"kind": "Exercise", "id": "x64d79a66"}, {"kind": "Exercise", "id": "xafb39ad9"}, {"kind": "Exercise", "id": "xb2bc03f1"}, {"kind": "Exercise", "id": "x97a3477a"}, {"kind": "Exercise", "id": "x9f30cf58"}, {"kind": "Exercise", "id": "x15657279"}, {"kind": "Exercise", "id": "xcb7052f8"}, {"kind": "Exercise", "id": "x43cd61a3"}, {"kind": "Exercise", "id": "x33721887"}, {"kind": "Exercise", "id": "xb8991b77"}, {"kind": "Exercise", "id": "xa185c45b"}, {"kind": "Exercise", "id": "x1c876f0e"}, {"kind": "Exercise", "id": "x5772163d"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/tachycardias-quiz-1/", "id": "tachycardias-quiz-1", "title": "NCLEX-RN questions on tachycardias 1", "description": "Questions related to tachycardias", "slug": "tachycardias-quiz-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/tachycardias-quiz-2/", "id": "tachycardias-quiz-2", "title": "NCLEX-RN questions on tachycardias 2", "description": "More tachycardia questions", "slug": "tachycardias-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/non-cyanotic-heart-diseases-quiz/", "id": "non-cyanotic-heart-diseases-quiz", "title": "NCLEX-RN questions on acyanotic heart diseases 1", "description": "NCLEX-RN questions related to non-cyanotic heart diseases.", "slug": "non-cyanotic-heart-diseases-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/non-cyanotic-heart-disease-quiz-2/", "id": "non-cyanotic-heart-disease-quiz-2", "title": "NCLEX-RN questions on acyanotic heart diseases 2", "description": "Another quiz for non-cyanotic heart disease.", "slug": "non-cyanotic-heart-disease-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/vasculitis-quiz/", "id": "vasculitis-quiz", "title": "NCLEX-RN questions on vasculitis 1", "description": "NCLEX-RN questions for vasculitis", "slug": "vasculitis-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/vasculitis-quiz-2/", "id": "vasculitis-quiz-2", "title": "NCLEX-RN questions on vasculitis 2", "description": "Another vasculitis quiz.", "slug": "vasculitis-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/pulmonary-conditions-quiz/", "id": "pulmonary-conditions-quiz", "title": "NCLEX-RN questions on pulmonary conditions 1", "description": "A quiz for NCLEX-RN style questions related to the pulmonary conditions tutorial", "slug": "pulmonary-conditions-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/emphysema-quiz/", "id": "emphysema-quiz", "title": "NCLEX-RN questions on emphysema 1", "description": "NCLEX-RN questions related to emphysema.", "slug": "emphysema-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/emphysema-quiz-2/", "id": "emphysema-quiz-2", "title": "NCLEX-RN questions on emphysema 2", "description": "Another emphysema quiz", "slug": "emphysema-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/chronic-bronchitis-quiz-1/", "id": "chronic-bronchitis-quiz-1", "title": "NCLEX-RN questions on chronic bronchitis 1", "description": "Questions related to chronic bronchitis", "slug": "chronic-bronchitis-quiz-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/chronic-bronchitis-quiz-2/", "id": "chronic-bronchitis-quiz-2", "title": "NCLEX-RN questions on chronic bronchitis 2", "description": "Questions related to chronic bronchitis", "slug": "chronic-bronchitis-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/lung-cancer-quiz/", "id": "lung-cancer-quiz", "title": "NCLEX-RN questions on lung cancer 1", "description": "NCLEX-RN style questions related to lung cancer", "slug": "lung-cancer-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/lung-cancer-quiz-2/", "id": "lung-cancer-quiz-2", "title": "NCLEX-RN questions on lung cancer 2", "description": "Another lung cancer quiz", "slug": "lung-cancer-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/pneumonia/", "id": "pneumonia", "title": "NCLEX-RN questions on pneumonia 1", "description": "NCLEX-RN style questions for the pneumonia tutorial", "slug": "pneumonia", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/pneumonia-quiz-2/", "id": "pneumonia-quiz-2", "title": "NCLEX-RN questions on pneumonia 2", "description": "Another pneumonia quiz", "slug": "pneumonia-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/pleural-effusion-quiz/", "id": "pleural-effusion-quiz", "title": "NCLEX-RN questions on pleural effusion 1", "description": "Questions related to pleural effusion", "slug": "pleural-effusion-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/pleural-effusion-quiz-2/", "id": "pleural-effusion-quiz-2", "title": "NCLEX-RN questions on pleural effusion 2", "description": "Another pleural effusion quiz", "slug": "pleural-effusion-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/bleeding-and-impaired-hemostasis-quiz/", "id": "bleeding-and-impaired-hemostasis-quiz", "title": "Bleeding and impaired hemostasis quiz 1", "description": "NCLEX-RN style questions related to bleeding and impaired hemostasis.", "slug": "bleeding-and-impaired-hemostasis-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/bleeding-and-impaired-hemostasis-quiz-2/", "id": "bleeding-and-impaired-hemostasis-quiz-2", "title": "Bleeding and impaired hemostasis quiz 2", "description": "More questions for bleeding and impaired hemostasis.", "slug": "bleeding-and-impaired-hemostasis-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/bleeding-and-impaired-hemostasis-quiz-3/", "id": "bleeding-and-impaired-hemostasis-quiz-3", "title": "Bleeding and impaired hemostasis quiz 3", "description": "Yet another bleeding and impaired hemostasis quiz.", "slug": "bleeding-and-impaired-hemostasis-quiz-3", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/anemia-quiz/", "id": "anemia-quiz", "title": "NCLEX-RN questions on anemia 1", "description": "A general quiz on anemia questions.", "slug": "anemia-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-anemia-2/", "id": "nclex-rn-questions-on-anemia-2", "title": "NCLEX-RN questions on anemia 2", "description": "More questions related to anemia", "slug": "nclex-rn-questions-on-anemia-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/leukemia-quiz/", "id": "leukemia-quiz", "title": "NCLEX-RN questions on leukemia 1", "description": "NCLEX-RN questions related to Leukemia", "slug": "leukemia-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/leukemia-quiz-2/", "id": "leukemia-quiz-2", "title": "NCLEX-RN questions on leukemia 2", "description": "Another leukemia quiz.", "slug": "leukemia-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-bronchiolitis/", "id": "nclex-rn-questions-on-bronchiolitis", "title": "NCLEX-RN questions on bronchiolitis 1", "description": "NCLEX-RN questions on bronchiolitis", "slug": "nclex-rn-questions-on-bronchiolitis", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-bronchiolitis-2/", "id": "nclex-rn-questions-on-bronchiolitis-2", "title": "NCLEX-RN questions on bronchiolitis 2", "description": "NCLEX-RN questions on bronchiolitis 2", "slug": "nclex-rn-questions-on-bronchiolitis-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-shock-1-1/", "id": "nclex-rn-questions-on-shock-1-1", "title": "NCLEX-RN questions on shock 1", "description": "Questions related to shock", "slug": "nclex-rn-questions-on-shock-1-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-shock-2-1/", "id": "nclex-rn-questions-on-shock-2-1", "title": "NCLEX-RN questions on shock 2", "description": "More questions related to shock", "slug": "nclex-rn-questions-on-shock-2-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-stroke-1-1/", "id": "nclex-rn-questions-on-stroke-1-1", "title": "NCLEX-RN questions on stroke 1", "description": "Questions related to stroke", "slug": "nclex-rn-questions-on-stroke-1-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-stroke-2/", "id": "nclex-rn-questions-on-stroke-2", "title": "NCLEX-RN questions on stroke 2", "description": "More questions related to stroke", "slug": "nclex-rn-questions-on-stroke-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-asthma-1/", "id": "nclex-rn-questions-on-asthma-1", "title": "NCLEX-RN questions on asthma 1", "description": "Questions related to asthma", "slug": "nclex-rn-questions-on-asthma-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-asthma-2/", "id": "nclex-rn-questions-on-asthma-2", "title": "NCLEX-RN questions on asthma 2", "description": "More questions related to asthma", "slug": "nclex-rn-questions-on-asthma-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-asthma-3/", "id": "nclex-rn-questions-on-asthma-3", "title": "NCLEX-RN questions on asthma 3", "description": "Questions related to asthma", "slug": "nclex-rn-questions-on-asthma-3", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-asthma-4/", "id": "nclex-rn-questions-on-asthma-4", "title": "NCLEX-RN questions on asthma 4", "description": "Questions related to asthma", "slug": "nclex-rn-questions-on-asthma-4", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-heart-valve-disease-1/", "id": "nclex-rn-questions-on-heart-valve-disease-1", "title": "NCLEX-RN questions on heart-valve disease 1", "description": "Questions related to heart valve disease", "slug": "nclex-rn-questions-on-heart-valve-disease-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-heart-valve-disease-2/", "id": "nclex-rn-questions-on-heart-valve-disease-2", "title": "NCLEX-RN questions on heart-valve disease 2", "description": "More questions related to heart valve disease", "slug": "nclex-rn-questions-on-heart-valve-disease-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/parkinson-questions/", "id": "parkinson-questions", "title": "NCLEX-RN questions on Parkinson's disease 2", "description": "Parkinson questions", "slug": "parkinson-questions", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-iron-deficiency-anemia-1/", "id": "nclex-rn-questions-on-iron-deficiency-anemia-1", "title": "NCLEX-RN questions on iron-deficiency anemia 1", "description": "Questions about iron-deficiency anemia", "slug": "nclex-rn-questions-on-iron-deficiency-anemia-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-iron-deficiency-anemia-2/", "id": "nclex-rn-questions-on-iron-deficiency-anemia-2", "title": "NCLEX-RN questions on iron-deficiency anemia 2", "description": "More questions related to iron-deficiency anemia", "slug": "nclex-rn-questions-on-iron-deficiency-anemia-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-pneumothorax-hemothorax-and-chylothorax-1/", "id": "nclex-rn-questions-on-pneumothorax--hemothorax-and-chylothorax-1", "title": "NCLEX-RN questions on pneumothorax, hemothorax and chylothorax 1", "description": "Questions related to pneumothorax, hemothorax and chylothorax", "slug": "nclex-rn-questions-on-pneumothorax-hemothorax-and-chylothorax-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-pneumothorax-hemothorax-and-chylothorax-2/", "id": "nclex-rn-questions-on-pneumothorax--hemothorax-and-chylothorax-2", "title": "NCLEX-RN questions on pneumothorax, hemothorax and chylothorax 2", "description": "More questions related to pneumothorax, hemothorax and chylothorax", "slug": "nclex-rn-questions-on-pneumothorax-hemothorax-and-chylothorax-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-tuberculosis/", "id": "nclex-rn-questions-on-tuberculosis", "title": "NCLEX-RN questions on tuberculosis 1", "description": "NCLEX-RN questions on tuberculosis", "slug": "nclex-rn-questions-on-tuberculosis", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-tuberculosis-2/", "id": "nclex-rn-questions-on-tuberculosis-2", "title": "NCLEX-RN questions on tuberculosis 2", "description": "NCLEX-RN questions on tuberculosis", "slug": "nclex-rn-questions-on-tuberculosis-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-hiv-aids/", "id": "nclex-rn-questions-on-hiv-aids", "title": "NCLEX-RN questions on HIV/AIDS 1", "description": "Questions related to HIV/AIDS", "slug": "nclex-rn-questions-on-hiv-aids", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-abdominal-aortic-aneurysm/", "id": "nclex-rn-questions-on-abdominal-aortic-aneurysm", "title": "NCLEX-RN questions on abdominal aortic aneurysm 1", "description": "NCLEX-RN questions on abdominal aortic aneurysm", "slug": "nclex-rn-questions-on-abdominal-aortic-aneurysm", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-pregnancy/", "id": "nclex-rn-questions-on-pregnancy", "title": "NCLEX-RN questions on pregnancy 1", "description": "NCLEX-RN questions on pregnancy", "slug": "nclex-rn-questions-on-pregnancy", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions/", "id": "nclex-rn-questions", "title": "NCLEX-RN questions on pregnancy 2", "description": "NCLEX-RN questions on pregnancy", "slug": "nclex-rn-questions", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-pertussis/", "id": "nclex-rn-questions-on-pertussis", "title": "NCLEX-RN questions on pertussis 1", "description": "NCLEX-RN questions on pertussis", "slug": "nclex-rn-questions-on-pertussis", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-pertussis-2/", "id": "nclex-rn-questions-on-pertussis-2", "title": "NCLEX-RN questions on pertussis 2", "description": "NCLEX-RN questions on pertussis", "slug": "nclex-rn-questions-on-pertussis-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/diabetes-questions/", "id": "diabetes-questions", "title": "NCLEX-RN questions on diabetes 1", "description": "Diabetes Questions 1", "slug": "diabetes-questions", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/stroke-questions/", "id": "stroke-questions", "title": "NCLEX-RN questions on stroke", "description": "Stroke questions", "slug": "stroke-questions", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/hypertension-questions/", "id": "hypertension-questions", "title": "NCLEX-RN questions on hypertension 1", "description": "Hypertension questions", "slug": "hypertension-questions", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/inflammatory-bowel-disease-questions/", "id": "inflammatory-bowel-disease-questions", "title": "NCLEX-RN questions on inflammatory bowel disease 1", "description": "Imflammatory bowel disease questions", "slug": "inflammatory-bowel-disease-questions", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-of-sexually-transmitted-infections-1/", "id": "nclex-rn-questions-of-sexually-transmitted-infections-1", "title": "NCLEX-RN questions on sexually transmitted infections 1", "description": "Questions related to sexually transmitted infectons", "slug": "nclex-rn-questions-of-sexually-transmitted-infections-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-sexually-transmitted-infections-2/", "id": "nclex-rn-questions-on-sexually-transmitted-infections-2", "title": "NCLEX-RN questions on sexually transmitted infections 2", "description": "Questions related to sexually transmitted infections", "slug": "nclex-rn-questions-on-sexually-transmitted-infections-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-heart-failure-1/", "id": "nclex-rn-questions-on-heart-failure-1", "title": "NCLEX.RN questions on heart failure 1", "description": "Questions about heart failure", "slug": "nclex-rn-questions-on-heart-failure-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-heart-failure-2/", "id": "nclex-rn-questions-on-heart-failure-2", "title": "NCLEX-RN questions on heart failure 2", "description": "NCLEX-RN questions on heart failure 2", "slug": "nclex-rn-questions-on-heart-failure-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-psychotic-disorders-1/", "id": "nclex-rn-questions-on-psychotic-disorders-1", "title": "NCLEX-RN questions on psychotic disorders 1", "description": "NCLEX-RN questions on psychotic disorders 1", "slug": "nclex-rn-questions-on-psychotic-disorders-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-psychotic-disorders/", "id": "nclex-rn-questions-on-psychotic-disorders", "title": "NCLEX-RN questions on psychotic disorders 2", "description": "NCLEX-RN questions on psychotic disorders", "slug": "nclex-rn-questions-on-psychotic-disorders", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-multiple-sclerosis-1/", "id": "nclex-rn-questions-on-multiple-sclerosis-1", "title": "NCLEX-RN questions on multiple sclerosis 1", "description": "NCLEX-RN questions on multiple sclerosis", "slug": "nclex-rn-questions-on-multiple-sclerosis-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-multiple-sclerosis-2/", "id": "nclex-rn-questions-on-multiple-sclerosis-2", "title": "NCLEX-RN questions on multiple sclerosis 2", "description": "NCLEX-RN questions on multiple sclerosis 2", "slug": "nclex-rn-questions-on-multiple-sclerosis-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-mood-disorders-1/", "id": "nclex-rn-questions-on-mood-disorders-1", "title": "NCLEX-RN questions on mood disorders 1", "description": "NCLEX-RN questions on mood disorders", "slug": "nclex-rn-questions-on-mood-disorders-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-mood-disorders-2/", "id": "nclex-rn-questions-on-mood-disorders-2", "title": "NCLEX-RN questions on mood disorders 2", "description": "NCLEX-RN questions on mood disorders 2", "slug": "nclex-rn-questions-on-mood-disorders-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-neurodevelopment-disorders/", "id": "nclex-rn-questions-on-neurodevelopment-disorders", "title": "NCLEX-RN questions on neurodevelopment disorders 1", "description": "NCLEX-RN questions on neurodevelopment disorders", "slug": "nclex-rn-questions-on-neurodevelopment-disorders", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/ncelx-rn-questions-on-neurodevelopment-disorders-2/", "id": "ncelx-rn-questions-on-neurodevelopment-disorders-2", "title": "NCELX-RN questions on neurodevelopment disorders 2", "description": "NCELX-RN questions on neurodevelopment disorders 2", "slug": "ncelx-rn-questions-on-neurodevelopment-disorders-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-delirium-and-dementia-1/", "id": "nclex-rn-questions-on-delirium-and-dementia-1", "title": "NCLEX-RN questions on delirium and dementia 1", "description": "NCLEX-RN questions on delirium and dementia", "slug": "nclex-rn-questions-on-delirium-and-dementia-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-delirium-and-dementia-2/", "id": "nclex-rn-questions-on-delirium-and-dementia-2", "title": "NCLEX-RN questions on delirium and dementia 2", "description": "NCLEX-RN questions on delirium and dementia 2", "slug": "nclex-rn-questions-on-delirium-and-dementia-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-anxiety-disorders-1/", "id": "nclex-rn-questions-on-anxiety-disorders-1", "title": "NCLEX-RN questions on anxiety disorders 1", "description": "NCLEX-RN questions on anxiety disorders 1", "slug": "nclex-rn-questions-on-anxiety-disorders-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-anxiety-disorders-2/", "id": "nclex-rn-questions-on-anxiety-disorders-2", "title": "NCLEX-RN questions on anxiety disorders 2", "description": "NCLEX-RN questions on anxiety disorders 1", "slug": "nclex-rn-questions-on-anxiety-disorders-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-drug-abuse-and-addiction/", "id": "nclex-rn-questions-on-drug-abuse-and-addiction", "title": "NCLEX-RN questions on drug abuse and addiction 1", "description": "NCLEX-RN questions on drug abuse and addiction", "slug": "nclex-rn-questions-on-drug-abuse-and-addiction", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-drug-abuse-and-addiction-2/", "id": "nclex-rn-questions-on-drug-abuse-and-addiction-2", "title": "NCLEX-RN questions on drug abuse and addiction 2", "description": "NCLEX-RN questions on drug abuse and addiction 2", "slug": "nclex-rn-questions-on-drug-abuse-and-addiction-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-gastroenteritis-1/", "id": "nclex-rn-questions-on-gastroenteritis-1", "title": "NCLEX-RN questions on gastroenteritis 1", "description": "NCLEX-RN questions on gastroenteritis", "slug": "nclex-rn-questions-on-gastroenteritis-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-gastroenteritis-2/", "id": "nclex-rn-questions-on-gastroenteritis-2", "title": "NCLEX-RN questions on gastroenteritis 2", "description": "NCLEX-RN questions on gastroenteritis 2", "slug": "nclex-rn-questions-on-gastroenteritis-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-polio-1/", "id": "nclex-rn-questions-on-polio-1", "title": "NCLEX-RN questions on polio 1", "description": "NCLEX-RN questions on polio 1", "slug": "nclex-rn-questions-on-polio-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-polio-2/", "id": "nclex-rn-questions-on-polio-2", "title": "NCLEX-RN questions on polio 2", "description": "NCLEX-RN questions on polio 2", "slug": "nclex-rn-questions-on-polio-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-heart-block/", "id": "nclex-rn-questions-on-heart-block", "title": "NCLEX-RN questions on heart block 1", "description": "NCLEX-RN questions on heart block", "slug": "nclex-rn-questions-on-heart-block", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-heart-block-2/", "id": "nclex-rn-questions-on-heart-block-2", "title": "NCLEX-RN questions on heart block 2", "description": "NCLEX-RN questions on heart block", "slug": "nclex-rn-questions-on-heart-block-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-hepatitis-1/", "id": "nclex-rn-questions-on-hepatitis-1", "title": "NCLEX-RN questions on hepatitis 1", "description": "NCLEX-RN questions on hepatitis 1", "slug": "nclex-rn-questions-on-hepatitis-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-hepatitis-2/", "id": "nclex-rn-questions-on-hepatitis-2", "title": "NCLEX-RN questions on hepatitis 2", "description": "NCLEX-RN questions on hepatitis 2", "slug": "nclex-rn-questions-on-hepatitis-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-malaria-1/", "id": "nclex-rn-questions-on-malaria-1", "title": "NCLEX-RN questions on malaria 1", "description": "NCLEX-RN questions on malaria 1", "slug": "nclex-rn-questions-on-malaria-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-malaria-2/", "id": "nclex-rn-questions-on-malaria-2", "title": "NCLEX-RN questions on malaria 2", "description": "NCLEX-RN questions on malaria 2", "slug": "nclex-rn-questions-on-malaria-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/alcohol-use-abuse-2/", "id": "alcohol-use---abuse-2", "title": "NCLEX-RN alcohol use and abuse", "description": "Alcohol Use & Abuse questions", "slug": "alcohol-use-abuse-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-celiac-disease-1/", "id": "nclex-rn-questions-on-celiac-disease-1", "title": "NCLEX-RN questions on celiac Disease 1", "description": "NCLEX-RN questions on Celiac Disease 1", "slug": "nclex-rn-questions-on-celiac-disease-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-celiac-disease-2/", "id": "nclex-rn-questions-on-celiac-disease-2", "title": "NCLEX-RN questions on celiac disease 2", "description": "NCLEX-RN questions on celiac disease 2", "slug": "nclex-rn-questions-on-celiac-disease-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-arthritis-1/", "id": "nclex-rn-questions-on-arthritis-1", "title": "NCLEX-RN questions on arthritis 1", "description": "NCLEX-RN questions on arthritis 1", "slug": "nclex-rn-questions-on-arthritis-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions/nclex-rn-questions-on-arthritis-2/", "id": "nclex-rn-questions-on-arthritis-2", "title": "NCLEX-RN questions on arthritis 2", "description": "NCLEX-RN questions on arthritis 2", "slug": "nclex-rn-questions-on-arthritis-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "A collection of questions from content covered on the NCLEX-RN. These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/by-nc-sa/3.0/us/).", "node_slug": "nclex-rn-questions", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions", "extended_slug": "test-prep/nclex-rn/nclex-practice-questions/nclex-rn-questions", "kind": "Topic", "slug": "nclex-rn-questions"}], "in_knowledge_map": false, "description": "A collection of questions from content covered on the NCLEX-RN.", "node_slug": "nclex-practice-questions", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/nclex-practice-questions", "extended_slug": "test-prep/nclex-rn/nclex-practice-questions", "kind": "Topic", "slug": "nclex-practice-questions"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/", "id": "nclex-rn-circulatory-system", "hide": false, "title": "Circulatory system physiology", "child_data": [{"kind": "Topic", "id": "xdc2ca9e2"}, {"kind": "Topic", "id": "x243a2b63"}, {"kind": "Topic", "id": "x85762440"}, {"kind": "Topic", "id": "xd88f3ab8"}, {"kind": "Topic", "id": "x1e8e0e76"}, {"kind": "Topic", "id": "x3529d919"}, {"kind": "Topic", "id": "xeeee9b06"}, {"kind": "Topic", "id": "x5f0a1b83"}, {"kind": "Topic", "id": "x5c935b9c"}, {"kind": "Topic", "id": "x20eba5b8"}, {"kind": "Topic", "id": "xb8414533"}, {"kind": "Topic", "id": "xf49eb476"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/", "id": "rn-circulatory-system", "hide": false, "title": "Circulatory system introduction", "child_data": [{"kind": "Video", "id": "1081136975"}, {"kind": "Video", "id": "1081230475"}, {"kind": "Video", "id": "1192377802"}, {"kind": "Video", "id": "1081112668"}, {"kind": "Video", "id": "1036278079"}, {"kind": "Video", "id": "1036157588"}, {"kind": "Video", "id": "1036250178"}, {"kind": "Video", "id": "1036166642"}, {"kind": "Video", "id": "x0c625f6c"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/meet-the-heart/", "id": "Vi1JK6IYVt8", "title": "Meet the heart!", "kind": "Video", "description": "Find out exactly where the heart rests in your body and what it does. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-heart"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/flow-through-the-heart/", "id": "7XaftdE_h60", "title": "Flow through the heart", "kind": "Video", "description": "Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "flow-through-the-heart"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/two-circulations-in-the-body/", "id": "K57qjYYjgIY", "title": "Two circulations in the body", "kind": "Video", "description": "Learn the difference between the pulmonary and systemic circulatory systems in the body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "two-circulations-in-the-body"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/lub-dub/", "id": "-4kGMI-qQ3I", "title": "Lub dub", "kind": "Video", "description": "Ever wonder why the heart sounds the way that it does? Opening and closing of heart valves makes the heart rhythm come alive with its lub dub beats... Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "lub-dub"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/layers-of-a-blood-vessel/", "id": "VMwa6yC3r-s", "title": "Layers of a blood vessel", "kind": "Video", "description": "Remember the 3 key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are all different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "layers-of-a-blood-vessel"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/arteries-vs-veins-what-s-the-difference/", "id": "7b6LRebCgb4", "title": "Arteries vs. veins - what's the difference?", "kind": "Video", "description": "Learn some important differences between arteries (high pressure/low volume) and veins (low pressure/high volume). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arteries-vs-veins-what-s-the-difference"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/resistance-in-a-tube/", "id": "8X7yEzgurP8", "title": "Resistance in a tube", "kind": "Video", "description": "Learn how the size of a tube (it's radius) is related to its resistance to something flowing through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "resistance-in-a-tube"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/putting-it-all-together-pressure-flow-and-resistance/", "id": "F2uzWHppVrk", "title": "Putting it all together: Pressure, flow, and resistance", "kind": "Video", "description": "See how pressure, flow, and resistance relate to one another and how they each affect the human body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "putting-it-all-together-pressure-flow-and-resistance"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/thermoregulation-in-the-circulatory-system/", "id": "C_LiAEjuIIc", "title": "Thermoregulation in the circulatory system", "kind": "Video", "slug": "thermoregulation-in-the-circulatory-system"}], "in_knowledge_map": false, "description": "No organ quite symbolizes love like the heart. One reason may be that your heart helps you live, by moving ~5 liters (1.3 gallons) of blood through almost 100,000 kilometers (62,000 miles) of blood vessels every single minute! It has to do this all day, everyday, without ever taking a vacation! Now that is true love. Learn about how the heart works, how blood flows through the heart, where the blood goes after it leaves the heart, and what your heart is doing when it makes the sound \u201cLub Dub.\u201d", "node_slug": "rn-circulatory-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system", "kind": "Topic", "slug": "rn-circulatory-system"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/", "id": "blood-pressure", "hide": false, "title": "Blood pressure", "child_data": [{"kind": "Video", "id": "1035877811"}, {"kind": "Video", "id": "1036248186"}, {"kind": "Video", "id": "1036250178"}, {"kind": "Video", "id": "1036040971"}, {"kind": "Video", "id": "1036034566"}, {"kind": "Video", "id": "1192925086"}, {"kind": "Video", "id": "1036166642"}, {"kind": "Video", "id": "1036127574"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/what-is-blood-pressure-1/", "id": "J97G6BeYW0I", "title": "What is blood pressure?", "kind": "Video", "description": "Find out what a systolic and diastolic blood pressure mean. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-blood-pressure-1"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/learn-how-a-stethoscope-can-help-determine-blood-pressure/", "id": "A8xO92u0VFs", "title": "Learn how a stethoscope can help determine blood pressure", "kind": "Video", "description": "Learn how Dr. Korotkoff cleverly used a stethoscope to determine blood pressure, and that we still use his trick today! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "learn-how-a-stethoscope-can-help-determine-blood-pressure"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/resistance-in-a-tube/", "id": "8X7yEzgurP8", "title": "Resistance in a tube", "kind": "Video", "description": "Learn how the size of a tube (it's radius) is related to its resistance to something flowing through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "resistance-in-a-tube"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/adding-up-resistance-in-series-and-in-parallel/", "id": "E-q9JpkGc-8", "title": "Adding up resistance in series and in parallel", "kind": "Video", "description": "Learn about how resistance can be added up in series and in parallel (similar to electrical circuits!). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adding-up-resistance-in-series-and-in-parallel"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/adding-up-resistance-problem/", "id": "5lXw5_4R2B4", "title": "Adding up resistance problem", "kind": "Video", "description": "Here's a chance to see if you can combine what you know to add up resistance in series AND in parallel. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adding-up-resistance-problem"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/flow-and-perfusion/", "id": "ePwN6rHhNyU", "title": "Flow and perfusion", "kind": "Video", "description": "Learn the difference between blood flow (Volume/time) and perfusion (Volume/time/amount of tissue). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "flow-and-perfusion"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/putting-it-all-together-pressure-flow-and-resistance/", "id": "F2uzWHppVrk", "title": "Putting it all together: Pressure, flow, and resistance", "kind": "Video", "description": "See how pressure, flow, and resistance relate to one another and how they each affect the human body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "putting-it-all-together-pressure-flow-and-resistance"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure/blood-pressure-changes-over-time/", "id": "fy_muPF0390", "title": "Blood pressure changes over time", "kind": "Video", "description": "See how increasing resistance in the blood vessels can cause blood pressure to rise over time. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "blood-pressure-changes-over-time"}], "in_knowledge_map": false, "description": "Using the stethoscope to check blood pressure is a technique that\u2019s been used for >100 years! Blood pressure is one of the major vital signs frequently measured by health care workers, and it tells us a lot about our blood circulation. Learn what blood pressure is, how it relates to resistance in a tube, why it is necessary to get oxygen to your cells, and how it can change as you age. We\u2019ll finally put it all together by relating pressure, flow, and resistance in one awesome equation!", "node_slug": "blood-pressure", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/blood-pressure", "kind": "Topic", "slug": "blood-pressure"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/", "id": "rn-blood-pressure-control", "hide": false, "title": "Blood pressure control", "child_data": [{"kind": "Video", "id": "1036230273"}, {"kind": "Video", "id": "1036126972"}, {"kind": "Video", "id": "1047183569"}, {"kind": "Video", "id": "1047335429"}, {"kind": "Video", "id": "1047465049"}, {"kind": "Video", "id": "1047330622"}, {"kind": "Video", "id": "1047114997"}, {"kind": "Video", "id": "1047406243"}, {"kind": "Video", "id": "1047456036"}, {"kind": "Video", "id": "1047327652"}, {"kind": "Video", "id": "1058371798"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/regulation-of-blood-pressure-with-baroreceptors/", "id": "ajLgwCygHsc", "title": "Regulation of blood pressure with baroreceptors", "kind": "Video", "description": "Learn about how the arteries use nerve impulses to help regulate blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "regulation-of-blood-pressure-with-baroreceptors"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/parts-of-a-nephron/", "id": "_vBJkK4eocA", "title": "Parts of a nephron", "kind": "Video", "description": "Learn about the 5 major parts of the kidney's nephron. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "parts-of-a-nephron"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/general-overview-of-the-raas-system-cells-and-hormones/", "id": "BVUeCLt68Ik", "title": "General overview of the RAAS system: Cells and hormones", "kind": "Video", "description": "Learn the important cells and hormones that are working together to control your blood pressure! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "general-overview-of-the-raas-system-cells-and-hormones"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/renin-production-in-the-kidneys/", "id": "AtlhAhONHyM", "title": "Renin production in the kidneys", "kind": "Video", "description": "Learn the three major triggers for Renin production by the Juxtaglomerular cells. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "renin-production-in-the-kidneys"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/activating-angiotensin-2/", "id": "cUVS0AlRyw8", "title": "Activating angiotensin 2", "kind": "Video", "description": "See how Renin and ACE work to cut Angiotensinogen down to size! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "activating-angiotensin-2"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/angiotensin-2-raises-blood-pressure/", "id": "Oges5YqDLHY", "title": "Angiotensin 2 raises blood pressure", "kind": "Video", "description": "See how Angiotensin 2 effects 4 target \"organs\" to increase blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "angiotensin-2-raises-blood-pressure"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/aldosterone-raises-blood-pressure-and-lowers-potassium/", "id": "64_ZfIemRGM", "title": "Aldosterone raises blood pressure and lowers potassium", "kind": "Video", "description": "See how Aldosterone effects the principal cells of the kidney to raise BP and lower potassium. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-raises-blood-pressure-and-lowers-potassium"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/aldosterone-removes-acid-from-the-blood/", "id": "7HTy-6NLWGM", "title": "Aldosterone removes acid from the blood", "kind": "Video", "description": "See how Aldosterone acts on the alpha-intercalated cell to remove protons (acid) from the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-removes-acid-from-the-blood"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/adh-secretion/", "id": "8dQdfbE8kFU", "title": "ADH secretion", "kind": "Video", "description": "Learn the key triggers for ADH secretion. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adh-secretion"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/adh-effects-on-blood-pressure/", "id": "Ot1We4_EfRE", "title": "ADH effects on blood pressure", "kind": "Video", "description": "See how ADH acts on blood vessels and the kidney to raise blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adh-effects-on-blood-pressure"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control/aldosterone-and-adh/", "id": "Z0XPMFL45oo", "title": "Aldosterone and ADH", "kind": "Video", "description": "Find out how Aldosterone and ADH cause changes in volume and osmolarity. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-and-adh"}], "in_knowledge_map": false, "description": "The human body enjoys stability. For example, if your blood pressure changes, the body puts a couple of brilliant systems into motion in order to respond and bring your blood pressure back to normal. There are some quick responses using nerves and some slower responses using hormones. The system using hormones is sometimes called the renin-angiotensin-aldosterone-system (RAAS), which is the main system in the body for controlling blood pressure. When your blood pressure drops too low or gets too high, your kidneys, liver, and pituitary gland (part of your brain) talk to each other to solve the problem. They do this without you even noticing! Learn how the body knows when the blood pressure has changed, and how hormones like angiotensin 2, aldosterone, and ADH help return blood pressure to back to normal.", "node_slug": "rn-blood-pressure-control", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/rn-blood-pressure-control", "kind": "Topic", "slug": "rn-blood-pressure-control"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/", "id": "Fetal-circulation", "hide": false, "title": "Fetal circulation", "child_data": [{"kind": "Video", "id": "1192840523"}, {"kind": "Video", "id": "1192637761"}, {"kind": "Video", "id": "1081230475"}, {"kind": "Video", "id": "1192980081"}, {"kind": "Video", "id": "1228485319"}, {"kind": "Video", "id": "1228367762"}, {"kind": "Video", "id": "1228525134"}, {"kind": "Video", "id": "1228306858"}, {"kind": "Video", "id": "1228326727"}, {"kind": "Video", "id": "1228408237"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/meet-the-placenta/", "id": "bQioHx12JuY", "title": "Meet the placenta!", "kind": "Video", "description": "Learn how the needs of the fetus are met by the placenta, which is a special organ that belongs to both the mother and the fetus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-placenta"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/umbilical-vessels-and-the-ductus-venosus/", "id": "XDF2QyQtd_Q", "title": "Umbilical vessels and the ductus venosus", "kind": "Video", "description": "Watch as fetal blood goes through umbilical vessels and takes a shortcut through the Ductus Venosus to make it back to the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "umbilical-vessels-and-the-ductus-venosus"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/flow-through-the-heart/", "id": "7XaftdE_h60", "title": "Flow through the heart", "kind": "Video", "description": "Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "flow-through-the-heart"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/hypoxic-pulmonary-vasoconstriction/", "id": "SJ1gu_WRx5o", "title": "Hypoxic pulmonary vasoconstriction", "kind": "Video", "description": "Watch how blood gets diverted away from alveoli with low oxygen levels. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "hypoxic-pulmonary-vasoconstriction"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/foramen-ovale-and-ductus-arteriosus/", "id": "cgccQVcFLi4", "title": "Foramen ovale and ductus arteriosus", "kind": "Video", "description": "Watch how the fetal heart allows blood to simply bypass the lungs altogether using the Foramen Ovale and the Ductus Arteriosus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "foramen-ovale-and-ductus-arteriosus"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/fetal-hemoglobin-and-hematocrit/", "id": "SqE5S1qS7ZU", "title": "Fetal hemoglobin and hematocrit", "kind": "Video", "description": "Although mom controls the oxygen source, the fetus has a couple of clever tricks to get the most oxygen possible! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "fetal-hemoglobin-and-hematocrit"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/double-bohr-effect/", "id": "SL3I_RYjyZo", "title": "Double Bohr effect", "kind": "Video", "description": "Learn how there are two distinct Bohr effects happening at the same time in the placenta. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "double-bohr-effect"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/fetal-circulation-right-before-birth/", "id": "-IRkisEtzsk", "title": "Fetal circulation right before birth", "kind": "Video", "description": "Watch how the blood flows through the fetal circulation and compare it to what happens in the baby's body. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "fetal-circulation-right-before-birth"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/baby-circulation-right-after-birth/", "id": "jFn0dyU5wUw", "title": "Baby circulation right after birth", "kind": "Video", "description": "Watch how the blood flows through the baby's circulation and compare it to what happens in the fetus. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "baby-circulation-right-after-birth"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/fetal-circulation/fetal-structures-in-an-adult/", "id": "Oga0K4reWoY", "title": "Fetal structures in an adult", "kind": "Video", "description": "Find out what happens to those nifty fetal structures once we get older. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "fetal-structures-in-an-adult"}], "in_knowledge_map": false, "description": "At one stage or another in development, every friend you know had gill slits and a tail. Pretty crazy thought, huh? Fetal development is incredible, and it\u2019s important to understand exactly how it happens. The structure and function of the circulatory system is incredibly complex, and fetuses are no exception. Find out how the heart and circulatory system work in the fetus!", "node_slug": "Fetal-circulation", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/Fetal-circulation", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/Fetal-circulation", "kind": "Topic", "slug": "fetal-circulation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/bloodvessels/", "id": "bloodvessels", "hide": false, "title": "Blood vessels", "child_data": [{"kind": "Video", "id": "1036278079"}, {"kind": "Video", "id": "x6451892a"}, {"kind": "Video", "id": "x02c66e8b"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/bloodvessels/layers-of-a-blood-vessel/", "id": "VMwa6yC3r-s", "title": "Layers of a blood vessel", "kind": "Video", "description": "Remember the 3 key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are all different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "layers-of-a-blood-vessel"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/bloodvessels/three-types-of-capillaries/", "id": "hSkIG4MdKqU", "title": "Three types of capillaries", "kind": "Video", "description": "Learn the differences between continuous, fenestrated, and discontinuous capillaries, and how they affect the movement of molecules. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "three-types-of-capillaries"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/bloodvessels/pre-capillary-sphincters/", "id": "yeX0uDpPBj4", "title": "Pre-capillary sphincters", "kind": "Video", "description": "Find out how the body controls how much blood flows through a capillary bed. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pre-capillary-sphincters"}], "in_knowledge_map": false, "description": "Where does your blood go after it leaves the heart? Your body has a fantastic pipeline system that moves your blood around to drop off oxygen and food to those hungry cells, and removes cell waste. Learn how arteries carry blood away from the heart, how veins bring blood back to the heart, and about the different layers of cells that make up these blood vessels.", "node_slug": "bloodvessels", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/bloodvessels", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/bloodvessels", "kind": "Topic", "slug": "bloodvessels"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/arterial-stiffness/", "id": "Arterial-stiffness", "hide": false, "title": "Arterial stiffness", "child_data": [{"kind": "Video", "id": "1036209223"}, {"kind": "Video", "id": "1036241270"}, {"kind": "Video", "id": "1036286076"}, {"kind": "Video", "id": "1036183638"}, {"kind": "Video", "id": "1036051470"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/arterial-stiffness/compliance-and-elastance/", "id": "cGhKJYfXW-c", "title": "Compliance and elastance", "kind": "Video", "description": "Learn about compliance (and elastance) of arteries, veins, and lead pipes! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "compliance-and-elastance"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/arterial-stiffness/bernoulli-s-equation-of-total-energy/", "id": "gYpokkRFvO8", "title": "Bernoulli's equation of total energy", "kind": "Video", "description": "Learn how total energy of a fluid helps explain why fluids can move from low pressure to high pressure! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "bernoulli-s-equation-of-total-energy"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/arterial-stiffness/stored-elastic-energy-in-large-and-middle-sized-arteries/", "id": "QcK7n-EqnQU", "title": "Stored elastic energy in large and middle sized arteries", "kind": "Video", "description": "See how arteries behave like sling shots, shooting blood (not rocks) onwards! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "stored-elastic-energy-in-large-and-middle-sized-arteries"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/arterial-stiffness/compliance-decreased-blood-pressure/", "id": "RsYgjO5BiHU", "title": "Compliance - decreased blood pressure", "kind": "Video", "description": "Find out how compliance allows arteries to store elastic energy (and lower pressure). Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "compliance-decreased-blood-pressure"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/arterial-stiffness/compliance-increased-blood-flow/", "id": "LcyEXlCIkmA", "title": "Compliance - increased blood flow", "kind": "Video", "description": "Learn how compliant arteries allows for a \"Constant Pressure System\" like a modern water gun! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "compliance-increased-blood-flow"}], "in_knowledge_map": false, "description": "Believe it or not, the arteries are elastic and when they recoil they actually push blood along when the heart is relaxing (diastole). This is known as the windkessel effect and is the same basic principle used by some water guns. Unfortunately, with all the work that the circulatory system has to do, our arteries can become rigid with age. When the arteries get stiff like lead pipes, the problem is quite different then when the arteries actually get clogged up, but just as important.", "node_slug": "Arterial-stiffness", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/Arterial-stiffness", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/Arterial-stiffness", "kind": "Topic", "slug": "arterial-stiffness"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-muscle-contraction/", "id": "Heart-muscle-contraction", "hide": false, "title": "Heart muscle contraction", "child_data": [{"kind": "Video", "id": "24006"}, {"kind": "Video", "id": "1097595603"}, {"kind": "Video", "id": "1097394824"}, {"kind": "Video", "id": "24004"}, {"kind": "Video", "id": "1101443158"}, {"kind": "Video", "id": "1101414195"}, {"kind": "Video", "id": "1117437512"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-muscle-contraction/tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction/", "id": "LiOfeSsjrB8", "title": "Tropomyosin and troponin and their role in regulating muscle contraction", "kind": "Video", "description": "Tropomyosin and troponin and their role in regulating muscle contraction. How calcium ion concentration dictates whether a muscle is contracting or not.", "slug": "tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-muscle-contraction/three-types-of-muscle/", "id": "bwOE1MEginA", "title": "Three types of muscle", "kind": "Video", "description": "Understanding the structure of a muscle cell.", "slug": "three-types-of-muscle"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-muscle-contraction/heart-cells-up-close/", "id": "__afuK1CMpQ", "title": "Heart cells up close!", "kind": "Video", "description": "Get a close-up view of the cardiac cells and see what makes them different from the other (skeletal and smooth) muscle cells. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "heart-cells-up-close"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-muscle-contraction/myosin-and-actin/", "id": "zopoN2i7ALQ", "title": "Myosin and actin", "kind": "Video", "description": "How myosin and actin interact to produce mechanical force.", "slug": "myosin-and-actin"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-muscle-contraction/calcium-puts-myosin-to-work/", "id": "vv6WBeqw2Nc", "title": "Calcium puts myosin to work", "kind": "Video", "description": "See exactly how Calcium binds Troponin-C and allows Myosin to do some work.", "slug": "calcium-puts-myosin-to-work"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-muscle-contraction/sympathetic-nerves-affect-myosin-activity/", "id": "xAL0tbYU8QU", "title": "Sympathetic nerves affect myosin activity", "kind": "Video", "description": "Check out how the amount of Myosin that is tugging on your heart can change depending on your activity level! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "sympathetic-nerves-affect-myosin-activity"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-muscle-contraction/why-doesn-t-the-heart-rip/", "id": "cuwMrVoG2V8", "title": "Why doesn't the heart rip?", "kind": "Video", "description": "Understand LaPlace's law to see the effect that pressure, radius, and wall thickness each have on the \"wall stress\" in the left ventricle. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "why-doesn-t-the-heart-rip"}], "in_knowledge_map": false, "description": "Your heart is made of a special type of muscle, found nowhere else in the body! This unique muscle is specialized to perform the repetitive task of pumping your blood throughout your body, from the day you\u2019re born to the day you die. We\u2019ll take an in-depth look of how the heart accomplishes this on a cellular level, and learn about the proteins actin and myosin that are the workhorses that tug and pull on one another to create every single muscle contraction. You\u2019ll appreciate the fact that your heart beat is a fairly sophisticated process!", "node_slug": "Heart-muscle-contraction", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/Heart-muscle-contraction", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/Heart-muscle-contraction", "kind": "Topic", "slug": "heart-muscle-contraction"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/", "id": "Heart-depolarization", "hide": false, "title": "Heart depolarization", "child_data": [{"kind": "Video", "id": "1077809718"}, {"kind": "Video", "id": "1077988383"}, {"kind": "Video", "id": "1078024276"}, {"kind": "Video", "id": "1077916714"}, {"kind": "Video", "id": "1078059064"}, {"kind": "Video", "id": "1089536367"}, {"kind": "Video", "id": "1077956571"}, {"kind": "Video", "id": "1078012364"}, {"kind": "Video", "id": "1084652257"}, {"kind": "Video", "id": "1089349882"}, {"kind": "Video", "id": "1084416478"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/membrane-potentials-part-1/", "id": "PtKAeihnbv0", "title": "Membrane potentials - part 1", "kind": "Video", "description": "Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "membrane-potentials-part-1"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/membrane-potentials-part-2/", "id": "eROhIFBGKuU", "title": "Membrane potentials - part 2", "kind": "Video", "description": "Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "membrane-potentials-part-2"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/permeability-and-membrane-potentials/", "id": "920PtNX-WCE", "title": "Permeability and membrane potentials", "kind": "Video", "description": "Find out why a cell that is permeable to multiple ions has a membrane potential that is influenced by the ion with the highest permeability. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "permeability-and-membrane-potentials"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/action-potentials-in-pacemaker-cells/", "id": "OQpFFiLdE0E", "title": "Action potentials in pacemaker cells", "kind": "Video", "description": "Find out how the pacemaker cells use the movement of sodium, calcium, and potassium to get your heart beating! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "action-potentials-in-pacemaker-cells"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/action-potentials-in-cardiac-myocytes/", "id": "rIVCuC-Etc0", "title": "Action potentials in cardiac myocytes", "kind": "Video", "description": "See how muscle cells in the heart contract by allowing Calcium to flow inside and bringing along some positive charge with it! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "action-potentials-in-cardiac-myocytes"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/reseting-cardiac-concentration-gradients/", "id": "j2iY1cT2gEE", "title": "Resetting cardiac concentration gradients", "kind": "Video", "description": "Watch as the heart cells use energy to reset the concentration gradients for all of the ions after the action potential has gone through. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "reseting-cardiac-concentration-gradients"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/depolarization-waves-flowing-through-the-heart/", "id": "s5smas8uum4", "title": "Depolarization waves flowing through the heart", "kind": "Video", "description": "Get a clearer idea of what a \"Depolarization Wave\" means and how it goes from cell to cell through the entire heart! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "depolarization-waves-flowing-through-the-heart"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/electrical-system-of-the-heart/", "id": "7K2icszdxQc", "title": "Electrical system of the heart", "kind": "Video", "description": "See where the pacemaker cells start the electrical wave of depolarization, and how it gets all the way to the ventricles of the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "electrical-system-of-the-heart"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/a-race-to-keep-pace/", "id": "_yR9DBHMFXE", "title": "A race to keep pace!", "kind": "Video", "description": "Find out how the various pacemaker cells in the heart actually race against the clock to try to keep pace for the heart, and how the heart has not one but two back up systems! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "a-race-to-keep-pace"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/thinking-about-heartbeats/", "id": "7TafYJLjhY4", "title": "Thinking about heartbeats", "kind": "Video", "description": "Find out what happens when things move very slowly through the AV Node! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "thinking-about-heartbeats"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/heart-depolarization/new-perspective-on-the-heart/", "id": "8zrJxuVW3u4", "title": "New perspective on the heart", "kind": "Video", "description": "Take a look at the heart in cross section, looking down at it from the top! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "new-perspective-on-the-heart"}], "in_knowledge_map": false, "description": "Your heart relies on the flow of electricity to maintain a steady, consistent beat - like an automatic pump that maintains a regular rate and rhythm throughout your life! There are specialized heart cells that allow positive current to travel quickly throughout the heart muscle. In these videos, we\u2019ll check out the flow of this positive charge on a macroscopic and microscopic level.", "node_slug": "Heart-depolarization", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/Heart-depolarization", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/Heart-depolarization", "kind": "Topic", "slug": "heart-depolarization"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/nerve-regulation-of-the-heart/", "id": "Nerve-regulation-of-the-heart", "hide": false, "title": "Nerve regulation of the heart", "child_data": [{"kind": "Video", "id": "1087764117"}, {"kind": "Video", "id": "1087636641"}, {"kind": "Video", "id": "1089555286"}, {"kind": "Video", "id": "1097662116"}, {"kind": "Video", "id": "1097434701"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/nerve-regulation-of-the-heart/changing-the-av-node-delay-chronotropic-effect/", "id": "cmQtbpYihAI", "title": "Changing the AV node delay - chronotropic effect", "kind": "Video", "description": "Find out exactly how your autonomic nervous system has a chronotropic effect (i.e. timing) that changes the delay between the contraction of the atria and the ventricles! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "changing-the-av-node-delay-chronotropic-effect"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/nerve-regulation-of-the-heart/changing-the-heart-rate-chronotropic-effect/", "id": "3HvIKsQb6es", "title": "Changing the heart rate - chronotropic effect", "kind": "Video", "description": "Find out exactly how your autonomic nervous system has a chronotropic effect (i.e. timing) that changes speed of your heartbeat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "changing-the-heart-rate-chronotropic-effect"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/nerve-regulation-of-the-heart/increasing-ventricular-contractility-inotropic-effect/", "id": "0eu-3FIRRz8", "title": "Increasing ventricular contractility - inotropic effect", "kind": "Video", "description": "Find out how the sympathetic nerves increase the heart's force of contraction and speed of relaxation! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "increasing-ventricular-contractility-inotropic-effect"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/nerve-regulation-of-the-heart/autonomic-nervous-system-effects-on-the-heart/", "id": "KiouveG278Y", "title": "Autonomic nervous system effects on the heart", "kind": "Video", "description": "Carefully go through each of the four major effects that the sympathetic and parasympathetic system has on your heart: Chronotropy, Dromotropy, Inotropy, and Lusitropy. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "autonomic-nervous-system-effects-on-the-heart"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/nerve-regulation-of-the-heart/getting-a-new-heart/", "id": "dqmaxkxInZ4", "title": "Getting a new heart", "kind": "Video", "description": "Think through the result of getting a new heart, and how the heart can still maintain homeostasis when the nerves are no longer around. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "getting-a-new-heart"}], "in_knowledge_map": false, "description": "Although your heart can beat independently, your nervous system is important as an external regulator. Your brain can tell your heart to speed up or slow down, depending on the scenario. For example, when you\u2019re falling asleep, your nervous system will cause your heart to slow down, and 8 hours later when your phone alarm goes off, your nervous system will speed up your heartbeat! So even though your heart muscle beats by itself, the nerves can ramp up or down the speed. Check out the videos to learn more about how the nerves help to regulate the heart.", "node_slug": "Nerve-regulation-of-the-heart", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/Nerve-regulation-of-the-heart", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/Nerve-regulation-of-the-heart", "kind": "Topic", "slug": "nerve-regulation-of-the-heart"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/", "id": "preload-afterload", "hide": false, "title": "Preload and afterload", "child_data": [{"kind": "Video", "id": "1117437512"}, {"kind": "Video", "id": "1133168259"}, {"kind": "Video", "id": "1150515528"}, {"kind": "Video", "id": "1150565196"}, {"kind": "Video", "id": "1150572205"}, {"kind": "Video", "id": "1150353015"}, {"kind": "Video", "id": "1150546387"}, {"kind": "Video", "id": "1150537387"}, {"kind": "Video", "id": "1159114411"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/why-doesn-t-the-heart-rip/", "id": "cuwMrVoG2V8", "title": "Why doesn't the heart rip?", "kind": "Video", "description": "Understand LaPlace's law to see the effect that pressure, radius, and wall thickness each have on the \"wall stress\" in the left ventricle. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "why-doesn-t-the-heart-rip"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/what-is-preload/", "id": "DLD23lPv8eo", "title": "What is preload?", "kind": "Video", "description": "Some say Preload = End-Diastolic Pressure, others say Preload = End-Diastolic Volume, so which one is it? Watch and find out! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-preload"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/preload-and-pressure/", "id": "S-4pFl3mjr8", "title": "Preload and pressure", "kind": "Video", "description": "Find out how left ventricular end-diastolic pressure helps you make an educated guess about preload. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "preload-and-pressure"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/preload-stretches-out-the-heart-cells/", "id": "SCo1m7OEqac", "title": "Preload stretches out the heart cells", "kind": "Video", "description": "Find out why stretching a heart cell in diastole affects how forcefully it contracts in systole. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "preload-stretches-out-the-heart-cells"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/frank-starling-mechanism/", "id": "5SO58NndlPI", "title": "Frank-Starling mechanism", "kind": "Video", "description": "Carefully follow 5 different preload scenarios to see how each one will have a different effect on how actin and myosin line up. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "frank-starling-mechanism"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/sarcomere-length-tension-relationship/", "id": "uVFqEi5j1v0", "title": "Sarcomere length-tension relationship", "kind": "Video", "description": "Find out why the length of a sarcomere (in diastole) affects the amount of force that it can generate (in systole), and how that would look on a graph. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "sarcomere-length-tension-relationship"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/active-contraction-vs-passive-recoil/", "id": "Ijret8P3kWM", "title": "Active contraction vs. passive recoil", "kind": "Video", "description": "Go through the similarities and differences between the sarcomere and a slingshot! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "active-contraction-vs-passive-recoil"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/what-is-afterload/", "id": "yOf3kDD3WIA", "title": "What is afterload?", "kind": "Video", "description": "Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-afterload"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload/increasing-the-heart-s-force-of-contraction/", "id": "FttqXKdw_Xk", "title": "Increasing the heart's force of contraction", "kind": "Video", "description": "Find out exactly how stretch increases force of contraction in end-diastole, whereas more calcium increased force of contraction in end-systole. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "increasing-the-heart-s-force-of-contraction"}], "in_knowledge_map": false, "description": "After using your jeans for a while, you\u2019ll begin to notice small tears and rips developing in the fabric. Why doesn\u2019t this happen to your heart as well? Well, your heart manages to stay healthy despite all of the \u201cwall stress\u201d that pulls on the heart walls. During different parts of the heart cycle (afterload vs. preload) the mechanics of \u201cwall stress\u201d change dramatically. Learn exactly what preload and afterload mean, and how we can use pressure-volume loops to estimate their values.", "node_slug": "preload-afterload", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/preload-afterload", "kind": "Topic", "slug": "preload-afterload"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/", "id": "Pressure-volume-loops", "hide": false, "title": "Pressure volume loops", "child_data": [{"kind": "Video", "id": "1117408699"}, {"kind": "Video", "id": "1117388594"}, {"kind": "Video", "id": "1117447604"}, {"kind": "Video", "id": "1133156250"}, {"kind": "Video", "id": "1133212041"}, {"kind": "Video", "id": "1133106461"}, {"kind": "Video", "id": "1133142260"}, {"kind": "Video", "id": "1133137366"}, {"kind": "Video", "id": "1132944890"}, {"kind": "Video", "id": "1159115460"}, {"kind": "Video", "id": "1133168259"}, {"kind": "Video", "id": "1117437512"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/pressure-in-the-left-heart-part-1/", "id": "XTF0-54yJMk", "title": "Pressure in the left heart - part 1", "kind": "Video", "description": "Watch the pressure in the left heart go up and down with every heart beat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "pressure-in-the-left-heart-part-1"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/pressure-in-the-left-heart-part-2/", "id": "QM4f1vos6Vk", "title": "Pressure in the left heart - part 2", "kind": "Video", "description": "Watch the pressure in the left heart go up and down with every heart beat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "pressure-in-the-left-heart-part-2"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/pressure-in-the-left-heart-part-3/", "id": "E5PndKebh70", "title": "Pressure in the left heart - part 3", "kind": "Video", "description": "Watch the pressure in the left heart go up and down with every heart beat! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "pressure-in-the-left-heart-part-3"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/left-ventricular-pressure-vs-time/", "id": "SrL6TQbWKJE", "title": "Left ventricular pressure vs. time", "kind": "Video", "description": "Ever wonder exactly how the left ventricle's pressure changes over time? Find out in this color-coded video! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "left-ventricular-pressure-vs-time"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/left-ventricular-volume-vs-time/", "id": "cJLbnWBU09E", "title": "Left ventricular volume vs. time", "kind": "Video", "description": "Left ventricular volume changes over time in a way that makes a curious looking graph. Learn more in this video! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "left-ventricular-volume-vs-time"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/drawing-a-pressure-volume-loop/", "id": "R7_irilQ_-A", "title": "Drawing a pressure-volume loop", "kind": "Video", "description": "Use the left ventricular pressure and volume information to put together a cool new graph. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "drawing-a-pressure-volume-loop"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/understanding-the-pressure-volume-loop/", "id": "AnwPH5yU8rY", "title": "Understanding the pressure-volume loop", "kind": "Video", "description": "Figure out how all of those physiology terms: end-systolic, end-diastolic, pulse pressure, stroke volume, and ejection fraction, can be easily figured out using the pressure-volume loop. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "understanding-the-pressure-volume-loop"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/end-diastolic-pressure-volume-relationship-edpvr/", "id": "h72iwhmB6zc", "title": "End diastolic pressure-volume relationship (EDPVR)", "kind": "Video", "description": "Find out what happens when the left ventricle is not allowed to contract, and instead you simply add and take away blood from it. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "end-diastolic-pressure-volume-relationship-edpvr"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/end-systolic-pressure-volume-relationship-espvr/", "id": "byj5VLuLS6c", "title": "End systolic pressure-volume relationship (ESPVR)", "kind": "Video", "description": "Find out what happens when the left ventricle is not allowed to relax, and instead you simply add and take away blood from it. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "end-systolic-pressure-volume-relationship-espvr"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/reimagine-the-pressure-volume-relationship/", "id": "BdlkhDHbN98", "title": "Reimagine the pressure volume relationship", "kind": "Video", "description": "Understand what is happening at the cellular level to cause two identical left ventricular volumes to have such different pressures! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "reimagine-the-pressure-volume-relationship"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/what-is-preload/", "id": "DLD23lPv8eo", "title": "What is preload?", "kind": "Video", "description": "Some say Preload = End-Diastolic Pressure, others say Preload = End-Diastolic Volume, so which one is it? Watch and find out! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-preload"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/pressure-volume-loops/why-doesn-t-the-heart-rip/", "id": "cuwMrVoG2V8", "title": "Why doesn't the heart rip?", "kind": "Video", "description": "Understand LaPlace's law to see the effect that pressure, radius, and wall thickness each have on the \"wall stress\" in the left ventricle. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "why-doesn-t-the-heart-rip"}], "in_knowledge_map": false, "description": "The pressure volume loop is one of the classic figures that helps us to conceptualize and understand the mechanics of the left ventricle of the heart. In addition to a filling up with blood and squeezing out blood there is a (very short) period of time when the heart muscle is contracting and relaxing with no volume change! As the left ventricle moves around the PV loop with each lub dub you get a sense for the amazing amount of work it does as pressures and volumes go up and down, all day, every day. This is a fascinating area where physics and biology meet to produce something miraculous.", "node_slug": "Pressure-volume-loops", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/Pressure-volume-loops", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/Pressure-volume-loops", "kind": "Topic", "slug": "pressure-volume-loops"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/", "id": "Changing-the-PV-loop", "hide": false, "title": "Changing the PV loop", "child_data": [{"kind": "Video", "id": "1133168259"}, {"kind": "Video", "id": "1150537387"}, {"kind": "Video", "id": "1159114411"}, {"kind": "Video", "id": "1159115460"}, {"kind": "Video", "id": "1179431919"}, {"kind": "Video", "id": "1179656720"}, {"kind": "Video", "id": "1179661500"}, {"kind": "Video", "id": "1179525912"}, {"kind": "Video", "id": "1179692608"}, {"kind": "Video", "id": "1179760355"}], "children": [{"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/what-is-preload/", "id": "DLD23lPv8eo", "title": "What is preload?", "kind": "Video", "description": "Some say Preload = End-Diastolic Pressure, others say Preload = End-Diastolic Volume, so which one is it? Watch and find out! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-preload"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/what-is-afterload/", "id": "yOf3kDD3WIA", "title": "What is afterload?", "kind": "Video", "description": "Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-afterload"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/increasing-the-heart-s-force-of-contraction/", "id": "FttqXKdw_Xk", "title": "Increasing the heart's force of contraction", "kind": "Video", "description": "Find out exactly how stretch increases force of contraction in end-diastole, whereas more calcium increased force of contraction in end-systole. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "increasing-the-heart-s-force-of-contraction"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/reimagine-the-pressure-volume-relationship/", "id": "BdlkhDHbN98", "title": "Reimagine the pressure volume relationship", "kind": "Video", "description": "Understand what is happening at the cellular level to cause two identical left ventricular volumes to have such different pressures! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "reimagine-the-pressure-volume-relationship"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/what-is-contractility/", "id": "gmHH0wIXsog", "title": "What is contractility?", "kind": "Video", "description": "Contractility tells us how many myosin heads are working at the end of systole; a number that goes up or down with the level of sympathetic nerve stimulation. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "what-is-contractility"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/getting-ea-arterial-elastance-from-the-pv-loop/", "id": "NG7nbAcAFNc", "title": "Getting Ea (arterial elastance) from the PV loop", "kind": "Video", "description": "Find out how to use the PV loop to draw the Ea (Arterial Elastance) line, and what it represents. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "getting-ea-arterial-elastance-from-the-pv-loop"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/arterial-elastance-ea-and-afterload/", "id": "BGIkU1yzBNM", "title": "Arterial elastance (Ea) and afterload", "kind": "Video", "description": "First, learn the difference between arterial elastance (Ea) and afterload. Then, understand how Ea is affected by changes in afterload, and in turn, how the PV loop can shift. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arterial-elastance-ea-and-afterload"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/arterial-elastance-ea-and-preload/", "id": "At8jOJ_rpzA", "title": "Arterial elastance (Ea) and preload", "kind": "Video", "description": "Understand how Ea is affected by changes in preload, and in turn, how the PV loop can shift. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "arterial-elastance-ea-and-preload"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/stroke-work-in-pv-loops-and-boxes/", "id": "aFV9dk5PsPA", "title": "Stroke work in PV loops and boxes", "kind": "Video", "description": "Watch how PV loops can be \"morphed\" into PV boxes to make drawing them and thinking about them much simpler. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "stroke-work-in-pv-loops-and-boxes"}, {"path": "khan/test-prep/nclex-rn/nclex-rn-circulatory-system/changing-the-pv-loop/contractility-ea-and-preload-effects-on-pv-boxes/", "id": "JRrm8TfBj1c", "title": "Contractility, Ea, and preload effects on PV boxes", "kind": "Video", "description": "See how contractility, Ea (arterial elastance), and preload each have an effect on PV Boxes. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "contractility-ea-and-preload-effects-on-pv-boxes"}], "in_knowledge_map": false, "description": "Once you\u2019ve learned about the PV loop, a natural question arises - Does it ever change shape? It turns out that there are precisely three things that can change the shape of the loop: 1. Preload, 2. Afterload, and 3. Contractility. That\u2019s it! The tricky part comes when you try to change one and you realize that the body begins to change the other two as well as a natural consequence. In order to simplify, you\u2019ll find that PV loops are sometimes even described as PV boxes. You\u2019ll get to learn about PV loops, PV boxes, and even play around with them yourself in this tutorial!", "node_slug": "Changing-the-PV-loop", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system/Changing-the-PV-loop", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system/Changing-the-PV-loop", "kind": "Topic", "slug": "changing-the-pv-loop"}], "in_knowledge_map": false, "description": "Your heart sits in the middle of your chest and pumps blood from about 4 weeks after conception until the day that you die. It never stops, and over your lifetime it will pump ~175 million liters of blood. To visualize that, imagine the amount of water that falls over Niagara falls in a few minutes. Remarkable! This little pump is the size of your clenched fist and in an adult can weigh about 300 grams. Watch these videos to learn more about how the heart works, blood flow in arteries and veins, blood pressure, and lymphatics.", "node_slug": "nclex-rn-circulatory-system", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/nclex-rn-circulatory-system", "extended_slug": "test-prep/nclex-rn/nclex-rn-circulatory-system", "kind": "Topic", "slug": "nclex-rn-circulatory-system"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/", "id": "rn-cardiovascular-diseases", "hide": false, "title": "Circulatory system diseases", "child_data": [{"kind": "Topic", "id": "xce0db357"}, {"kind": "Topic", "id": "xfd743c78"}, {"kind": "Topic", "id": "xfabe6be6"}, {"kind": "Topic", "id": "x3c07fd07"}, {"kind": "Topic", "id": "xdff254c3"}, {"kind": "Topic", "id": "x6a780868"}, {"kind": "Topic", "id": "x4a54a43a"}, {"kind": "Topic", "id": "xb78806dd"}, {"kind": "Topic", "id": "xbb48dcc1"}, {"kind": "Topic", "id": "x2ae84b36"}, {"kind": "Topic", "id": "xf383e0b6"}, {"kind": "Topic", "id": "x71275ac2"}, {"kind": "Topic", "id": "xc09b0ed9"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/", "id": "hypertension-rn", "hide": false, "title": "Hypertension", "child_data": [{"kind": "Article", "id": "x52c25afc"}, {"kind": "Video", "id": "x52bdc6d3"}, {"kind": "Video", "id": "x53ee6e80"}, {"kind": "Video", "id": "x4a5bef03"}, {"kind": "Video", "id": "x0be78424"}, {"kind": "Video", "id": "xe17e1b75"}, {"kind": "Video", "id": "x23e5e79d"}, {"kind": "Video", "id": "x73c3b5c8"}, {"kind": "Video", "id": "xa24c87b8"}, {"kind": "Video", "id": "x0bd0746e"}, {"kind": "Video", "id": "xf939a492"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/what-is-hypertension-2/", "id": "l5TsKWd-fO8", "title": "What is hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-hypertension-2"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/stages-of-hypertension/", "id": "SYcsZ6J3xZ4", "title": "Stages of hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "stages-of-hypertension"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/primary-hypertension/", "id": "qyUHnh73Sng", "title": "Primary hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "primary-hypertension"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/hypertension-and-heart-damage/", "id": "SHjxi0bRiLA", "title": "Hypertension and heart damage", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hypertension-and-heart-damage"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/hypertension-and-blood-vessel-damage/", "id": "a3XcYsXQYaM", "title": "Hypertension and blood vessel damage", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hypertension-and-blood-vessel-damage"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/complications-of-hypertension/", "id": "fMG6a6c6Jd4", "title": "Complications of hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "complications-of-hypertension"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/secondary-hypertension/", "id": "zTb4TklMVcY", "title": "Secondary hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "secondary-hypertension"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/diagnosis-of-hypertension/", "id": "_7Jmj6MriKg", "title": "Diagnosis of hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-of-hypertension"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/treatment-of-hypertension/", "id": "913Pj5AxmHQ", "title": "Treatment of hypertension", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatment-of-hypertension"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn/hypertensive-crisis/", "id": "ePWrbBJgssw", "title": "Hypertensive crisis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hypertensive-crisis"}], "in_knowledge_map": false, "description": "", "node_slug": "hypertension-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/hypertension-rn", "kind": "Topic", "slug": "hypertension-rn"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/", "id": "rn-coronary-artery-disease", "hide": false, "title": "Coronary artery disease", "child_data": [{"kind": "Video", "id": "x221265d4"}, {"kind": "Video", "id": "x8e8e24e8"}, {"kind": "Video", "id": "xc3abc709"}, {"kind": "Video", "id": "x56611428"}, {"kind": "Video", "id": "xc6edda86"}, {"kind": "Video", "id": "x5b27bfe4"}, {"kind": "Video", "id": "xe17fbbdf"}, {"kind": "Video", "id": "x3e29b0ff"}, {"kind": "Video", "id": "x4e523752"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/what-is-coronary-artery-disease/", "id": "EATkbpqlxvc", "title": "What is coronary artery disease?", "kind": "Video", "slug": "what-is-coronary-artery-disease"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/risk-factors-for-coronary-artery-disease/", "id": "RrXJsf9x_sY", "title": "Risk factors for coronary artery disease", "kind": "Video", "slug": "risk-factors-for-coronary-artery-disease"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/atherosclerosis/", "id": "g3kDdg8r6NY", "title": "Atherosclerosis", "kind": "Video", "slug": "atherosclerosis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/heart-attack-myocardial-infarction-pathophysiology/", "id": "T_b9U5gn_Zk", "title": "Heart attack (myocardial infarction) pathophysiology", "kind": "Video", "slug": "heart-attack-myocardial-infarction-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/heart-attack-myocardial-infarct-diagnosis/", "id": "kO8-RPIkuLE", "title": "Heart attack (myocardial infarct) diagnosis", "kind": "Video", "slug": "heart-attack-myocardial-infarct-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/heart-attack-myocardial-infarct-medications/", "id": "Pfg9FY1Fguc", "title": "Heart attack (myocardial infarct) medications", "kind": "Video", "slug": "heart-attack-myocardial-infarct-medications"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/heart-attack-myocardial-infarction-interventions-and-treatment/", "id": "dLtFP6t99yo", "title": "Heart attack (myocardial infarction) interventions and treatment", "kind": "Video", "slug": "heart-attack-myocardial-infarction-interventions-and-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/healing-after-a-heart-attack-myocardial-infarction/", "id": "9lIxelNVmNU", "title": "Healing after a heart attack (myocardial infarction)", "kind": "Video", "slug": "healing-after-a-heart-attack-myocardial-infarction"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease/complications-after-a-heart-attack-myocardial-infarction/", "id": "m1DOnLhVuX4", "title": "Complications after a heart attack (myocardial infarction)", "kind": "Video", "slug": "complications-after-a-heart-attack-myocardial-infarction"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-coronary-artery-disease", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-coronary-artery-disease", "kind": "Topic", "slug": "rn-coronary-artery-disease"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/", "id": "rn-stroke", "hide": false, "title": "Stroke", "child_data": [{"kind": "Article", "id": "x10c3de57"}, {"kind": "Video", "id": "xac42ab4d"}, {"kind": "Video", "id": "xf3f001d8"}, {"kind": "Video", "id": "x66f0de58"}, {"kind": "Video", "id": "x19793179"}, {"kind": "Video", "id": "xf171afc3"}, {"kind": "Video", "id": "x890fc9db"}, {"kind": "Video", "id": "x705027ed"}, {"kind": "Video", "id": "x9baa9fdd"}, {"kind": "Video", "id": "x4b8a13bb"}, {"kind": "Video", "id": "xd1b2182f"}, {"kind": "Video", "id": "x1f8d3007"}, {"kind": "Video", "id": "x99ebf60a"}, {"kind": "Video", "id": "x867d1836"}, {"kind": "Video", "id": "xcb64b77e"}, {"kind": "Video", "id": "xef708355"}, {"kind": "Video", "id": "x2a2f4afd"}, {"kind": "Video", "id": "x368e7861"}, {"kind": "Video", "id": "xe6b2f95a"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/cerebral-blood-supply-part-1/", "id": "hfG8J_X1D5Q", "title": "Cerebral blood supply: Part 1", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "cerebral-blood-supply-part-1"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/cerebral-blood-supply-part-2/", "id": "kVulo3qDcUo", "title": "Cerebral blood supply: Part 2", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "cerebral-blood-supply-part-2"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/what-is-a-stroke/", "id": "QIAI6KOwKII", "title": "What is a stroke?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-a-stroke"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/risk-factors-for-stroke/", "id": "QskZ-o0egF8", "title": "Risk factors for stroke", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "risk-factors-for-stroke"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/ischemic-stroke/", "id": "qCvV11R2lgg", "title": "Ischemic stroke", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "ischemic-stroke"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/hemorrhagic-strokes/", "id": "TJeUOPc9pgs", "title": "Hemorrhagic strokes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "hemorrhagic-strokes"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/ischemic-core-and-penumbra/", "id": "lmiXf-jilGE", "title": "Ischemic core and penumbra", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "ischemic-core-and-penumbra"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/the-ischemic-cascade-in-stroke/", "id": "57pvSMQ0E5M", "title": "The ischemic cascade in stroke", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-ischemic-cascade-in-stroke"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/blood-brain-barrier-and-vasogenic-edema/", "id": "QjJT87nY1WI", "title": "Blood brain barrier and vasogenic edema", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "blood-brain-barrier-and-vasogenic-edema"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/post-stroke-inflammation/", "id": "GdfP-loRfm0", "title": "Post stroke inflammation", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "post-stroke-inflammation"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/how-do-you-know-if-someone-is-having-a-stroke-think-fast/", "id": "bL7yQRbYJCo", "title": "How do you know if someone is having a stroke: Think FAST!", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "how-do-you-know-if-someone-is-having-a-stroke-think-fast"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/common-stroke-signs-and-symptoms/", "id": "kVGb778WcMU", "title": "Common stroke signs and symptoms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "common-stroke-signs-and-symptoms"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/diagnosing-strokes-by-history-and-physical-exam/", "id": "yTMZsxSBv_0", "title": "Diagnosing strokes by history and physical exam", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-strokes-by-history-and-physical-exam"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/diagnosing-strokes-with-imaging-ct-mri-and-angiography/", "id": "xC55TgPmfZ0", "title": "Diagnosing strokes with imaging CT, MRI, and Angiography", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-strokes-with-imaging-ct-mri-and-angiography"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/diagnosing-strokes-with-lab-tests/", "id": "AgPpM4jqkxU", "title": "Diagnosing strokes with lab tests", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-strokes-with-lab-tests"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/acute-treatment-of-stroke-with-medications/", "id": "LvoONWiXJ5I", "title": "Acute treatment of stroke with medications", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "acute-treatment-of-stroke-with-medications"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/treatment-of-stroke-with-interventions/", "id": "BYE5lxTzNVM", "title": "Treatment of stroke with interventions", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatment-of-stroke-with-interventions"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke/preventing-further-strokes/", "id": "FVedgkn0o70", "title": "Preventing further strokes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preventing-further-strokes"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-stroke", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-stroke", "kind": "Topic", "slug": "rn-stroke"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/", "id": "heart-failure-r", "hide": false, "title": "Heart failure", "child_data": [{"kind": "Article", "id": "x35330429"}, {"kind": "Video", "id": "xe3ef82e5"}, {"kind": "Video", "id": "xca053ff7"}, {"kind": "Video", "id": "x7576b6a6"}, {"kind": "Video", "id": "x37ba0114"}, {"kind": "Video", "id": "xd58bf313"}, {"kind": "Video", "id": "x91adf38c"}, {"kind": "Video", "id": "x98208158"}, {"kind": "Video", "id": "xdbb6de08"}, {"kind": "Video", "id": "x41aabd1a"}, {"kind": "Video", "id": "xf5b79426"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/what-is-heart-failure/", "id": "2aiRpr5UCZs", "title": "What is heart failure?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-heart-failure"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/systolic-heart-failure-pathophysiology/", "id": "FL3Q5Q6IdAY", "title": "Systolic heart failure pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "systolic-heart-failure-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/diastolic-heart-failure-pathophysiology/", "id": "rGAIHFB9FL0", "title": "Diastolic heart failure pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diastolic-heart-failure-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/compensation-and-decompensation-in-heart-failure/", "id": "x8aBKMYqGPY", "title": "Compensation and decompensation in heart failure", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "compensation-and-decompensation-in-heart-failure"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/symptoms-of-left-sided-heart-failure/", "id": "CYr4n5KJ-yw", "title": "Symptoms of left sided heart failure", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "symptoms-of-left-sided-heart-failure"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/symptoms-of-right-sided-heart-failure/", "id": "pLba3OzsfDU", "title": "Symptoms of right sided heart failure", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "symptoms-of-right-sided-heart-failure"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/heart-failure-diagnosis/", "id": "AScf1Z40lng", "title": "Heart failure diagnosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "heart-failure-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/heart-failure-treatment-early-stages/", "id": "PJgRZA5mE0s", "title": "Heart failure treatment - Early stages", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "heart-failure-treatment-early-stages"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/heart-failure-treatment-late-stages/", "id": "JDo9LNMOLtE", "title": "Heart failure treatment - Late stages", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "heart-failure-treatment-late-stages"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r/heart-failure-treatment-devices-and-surgery/", "id": "1q06qHX1K-I", "title": "Heart failure treatment - Devices and surgery", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "heart-failure-treatment-devices-and-surgery"}], "in_knowledge_map": false, "description": "", "node_slug": "heart-failure-r", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/heart-failure-r", "kind": "Topic", "slug": "heart-failure-r"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/", "id": "rn-dysrhythmia-and-tachycardia", "hide": false, "title": "Cardiac dysrhythmias and tachycardias", "child_data": [{"kind": "Exercise", "id": "x25127b3b"}, {"kind": "Exercise", "id": "xef285cb3"}, {"kind": "Video", "id": "x9cae2691"}, {"kind": "Video", "id": "xaba776f0"}, {"kind": "Video", "id": "x9a40aecd"}, {"kind": "Video", "id": "xb9718cdc"}, {"kind": "Video", "id": "x8cd4127f"}, {"kind": "Video", "id": "xd501900f"}, {"kind": "Video", "id": "xb14601d0"}, {"kind": "Video", "id": "x450b243f"}, {"kind": "Video", "id": "x6fcf483c"}, {"kind": "Video", "id": "xf42958f2"}, {"kind": "Video", "id": "x2bc11ae9"}, {"kind": "Video", "id": "xec67ec4f"}, {"kind": "Video", "id": "x8ba1d867"}, {"kind": "Video", "id": "xd53a96f0"}, {"kind": "Video", "id": "x39a0c7dd"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/tachycardias-quiz-1/", "id": "tachycardias-quiz-1", "title": "NCLEX-RN questions on tachycardias 1", "description": "Questions related to tachycardias", "slug": "tachycardias-quiz-1", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/tachycardias-quiz-2/", "id": "tachycardias-quiz-2", "title": "NCLEX-RN questions on tachycardias 2", "description": "More tachycardia questions", "slug": "tachycardias-quiz-2", "kind": "Exercise"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/electrical-conduction-in-heart-cells/", "id": "TQwe0Y4Ynjs", "title": "Electrical conduction in heart cells", "kind": "Video", "slug": "electrical-conduction-in-heart-cells"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/normal-sinus-rhythm-on-ecg/", "id": "lRHq7sMRWpU", "title": "Normal sinus rhythm on an EKG", "kind": "Video", "slug": "normal-sinus-rhythm-on-ecg"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/supraventricular-tachycardia/", "id": "eCrQDI1OAeU", "title": "Supraventricular tachycardia (SVT)", "kind": "Video", "slug": "supraventricular-tachycardia"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/atrial-fibrillation/", "id": "0FufW_MZMa4", "title": "Atrial fibrillation (Afib)", "kind": "Video", "slug": "atrial-fibrillation"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/atrial-flutter/", "id": "0URl8p39wQo", "title": "Atrial flutter (AFL)", "kind": "Video", "slug": "atrial-flutter"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/multifocal-atrial-tachycardia/", "id": "5brsc8IbWSk", "title": "Multifocal atrial tachycardia (MAT)", "kind": "Video", "slug": "multifocal-atrial-tachycardia"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/avrt-avnrt/", "id": "tRuvXP-H164", "title": "Atrioventricular reentrant tachycardia (AVRT) & AV nodal reentrant tachycardia (AVNRT)", "kind": "Video", "slug": "avrt-avnrt"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/ventricular-tachycardias/", "id": "C1smdOKd4Ds", "title": "Ventricular tachycardia (Vtach)", "kind": "Video", "slug": "ventricular-tachycardias"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/torsades-de-pointes/", "id": "niTxSf60wDs", "title": "Torsades de pointes", "kind": "Video", "slug": "torsades-de-pointes"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/ventricular-fibrillation/", "id": "BSf_YIyZzi8", "title": "What is ventricle fibrillation (Vfib)?", "kind": "Video", "slug": "ventricular-fibrillation"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/pulseless-electrical-activity-asystole/", "id": "_HXl3mu1IoM", "title": "Pulseless electrical activity (PEA) and asystole", "kind": "Video", "slug": "pulseless-electrical-activity-asystole"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/electrocardioversion/", "id": "el6nuUsff84", "title": "Electrocardioversion", "kind": "Video", "slug": "electrocardioversion"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/pacemakers/", "id": "b3xMC6zdrvM", "title": "Pacemakers", "kind": "Video", "slug": "pacemakers"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/antiarrhythmics/", "id": "5xSEZszGDtI", "title": "Antiarrhythmics", "kind": "Video", "slug": "antiarrhythmics"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia/ablation/", "id": "vbslqfcBpnU", "title": "Ablation", "kind": "Video", "slug": "ablation"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-dysrhythmia-and-tachycardia", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-dysrhythmia-and-tachycardia", "kind": "Topic", "slug": "rn-dysrhythmia-and-tachycardia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/", "id": "rn-non-cyanotic-heart-diseases", "hide": false, "title": "Acyanotic heart diseases", "child_data": [{"kind": "Video", "id": "x84f351ba"}, {"kind": "Video", "id": "xd97d69be"}, {"kind": "Video", "id": "x0cf228a7"}, {"kind": "Video", "id": "x6a510446"}, {"kind": "Video", "id": "x22bf1bc9"}, {"kind": "Video", "id": "x947323ac"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/what-is-acyanotic-heart-disease/", "id": "rbWaiXa9A1k", "title": "What is acyanotic heart disease?", "kind": "Video", "description": "Acyanotic heart disease is a group of heart conditions where blood with oxygen mixes with blood with little oxygen in the heart. This mixing is not enough to cause cyanosis, a symptom of not enough oxygen being delivered to tissues of the body, hence the name acyanotic heart disease.", "slug": "what-is-acyanotic-heart-disease"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/acyanotic-heart-disasee-diagnosis/", "id": "tOUys6vlTvE", "title": "Acyanotic heart disease diagnosis", "kind": "Video", "description": "How do we know a patient has an acyanotic heart disease? Learn how health care professionals use a variety of tools to diagnosis these conditions, such as stethoscopes, chest x-rays, echocardiogram, and electrocardiograms (ECG or EKG).", "slug": "acyanotic-heart-disasee-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/what-is-eisenmenger-syndrome/", "id": "qJCoXVdPowo", "title": "What is Eisenmenger syndrome?", "kind": "Video", "description": "Eisenmenger's syndrome is when blood in the heart shunts from right-to-left due to increased pressure in the right ventricle. This increased pressure is usually caused by extra blood flowing through the blood vessels of the lungs, originally caused by left-to-right shunting of blood from a hole in the heart wall.", "slug": "what-is-eisenmenger-syndrome"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/atrial-septal-defect/", "id": "UNWxKDvBFik", "title": "Atrial septal defect", "kind": "Video", "description": "An atrial septal defect is a hole between the two atriums of the heart. Normally this hole is present at birth but closes within a few days of life. Failure of this hole to close is called an atrial septal defect, and usually is asymptomatic (no obvious symptoms are present).", "slug": "atrial-septal-defect"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/rn-ventricular-septal-defect/", "id": "lZSi0xifXwc", "title": "Ventricular septal defect", "kind": "Video", "description": "An ventricular septal defect is a hole between the two ventricles of the heart. Normally this hole is present at birth but closes within a few days of life. Failure of this hole to close is called a ventricular septal defect, and usually is asymptomatic (no obvious symptoms are present).", "slug": "rn-ventricular-septal-defect"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases/patent-ductus-arteriosus/", "id": "U2fGKvbir24", "title": "Patent ductus arteriosus", "kind": "Video", "description": "Patent ductus arteriosus is a medical condition where a blood vessel called the ductus arteriosus does not permanently close after birth. Learn why the ductus arteriosus does not close, why patients with this condition have a wide pulse pressure, and how the disease is treated with surgery and nonsteroidal anti-inflammatory drugs (NSAIDs).", "slug": "patent-ductus-arteriosus"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-non-cyanotic-heart-diseases", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-non-cyanotic-heart-diseases", "kind": "Topic", "slug": "rn-non-cyanotic-heart-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/", "id": "rn-cyanotic-heart-diseases", "hide": false, "title": "Cyanotic heart diseases", "child_data": [{"kind": "Video", "id": "x8ef614e6"}, {"kind": "Video", "id": "xf2b62153"}, {"kind": "Video", "id": "xe947035a"}, {"kind": "Video", "id": "x20f0b6aa"}, {"kind": "Video", "id": "x5f5a0485"}, {"kind": "Video", "id": "xf512ab3d"}, {"kind": "Video", "id": "x36b7249d"}, {"kind": "Video", "id": "x9d677e74"}, {"kind": "Video", "id": "x3749b01f"}, {"kind": "Video", "id": "xc7df254e"}, {"kind": "Video", "id": "x0a98ab7a"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/what-is-cyanotic-heart-disease/", "id": "E2qP4TsHGGQ", "title": "What is cyanotic heart disease", "kind": "Video", "slug": "what-is-cyanotic-heart-disease"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/shunting-in-the-heart/", "id": "gm7lIcBkXFc", "title": "Shunting in the heart", "kind": "Video", "slug": "shunting-in-the-heart"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/einsenmenger-coarctation-of-aorta/", "id": "R0OM94TaZOo", "title": "Einsenmenger coarctation of aorta", "kind": "Video", "slug": "einsenmenger-coarctation-of-aorta"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/tetralogy-of-fallot/", "id": "Be3tuYMgA9I", "title": "Tetralogy of fallot", "kind": "Video", "slug": "tetralogy-of-fallot"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/truncus-arteriosus/", "id": "HrMgmnZ_4gs", "title": "Truncus arteriosus", "kind": "Video", "slug": "truncus-arteriosus"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/total-anomalous-pulmonary-venous-return/", "id": "607Buvyc0VI", "title": "Total anomalous pulmonary venous return", "kind": "Video", "slug": "total-anomalous-pulmonary-venous-return"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/tricuspid-atresia/", "id": "BE0nxWUAg-A", "title": "Tricuspid atresia", "kind": "Video", "slug": "tricuspid-atresia"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/transposition-of-great-arteries/", "id": "ons-gYLeNjU", "title": "Transposition of great arteries", "kind": "Video", "slug": "transposition-of-great-arteries"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/ebsteins-anomoly/", "id": "rQSclv1Ah5s", "title": "Ebstein's anomoly", "kind": "Video", "slug": "ebsteins-anomoly"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/hypoplastic-left-heart-syndrome-and-norwood-glenn-fontan/", "id": "4GUm8ybncWY", "title": "Hypoplastic left heart syndrome and norwood glenn fontan", "kind": "Video", "slug": "hypoplastic-left-heart-syndrome-and-norwood-glenn-fontan"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases/cyanotic-heart-diseases-diagnosis-and-treatment/", "id": "oeyCaB_sj-0", "title": "Cyanotic heart diseases - Diagnosis and treatment", "kind": "Video", "slug": "cyanotic-heart-diseases-diagnosis-and-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-cyanotic-heart-diseases", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cyanotic-heart-diseases", "kind": "Topic", "slug": "rn-cyanotic-heart-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/", "id": "rn-vasculitis", "hide": false, "title": "Vasculitis", "child_data": [{"kind": "Video", "id": "x38860951"}, {"kind": "Video", "id": "xb0b35346"}, {"kind": "Video", "id": "x49b30160"}, {"kind": "Video", "id": "x6c67f968"}, {"kind": "Video", "id": "x9d92e453"}, {"kind": "Video", "id": "xbef79b5c"}, {"kind": "Video", "id": "x271e8772"}, {"kind": "Video", "id": "x71621334"}, {"kind": "Video", "id": "xae3c8fc9"}, {"kind": "Video", "id": "xb29e0e12"}, {"kind": "Video", "id": "x2302bda2"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/what-is-vasculitis/", "id": "qMaVLzWnS80", "title": "What is vasculitis?", "kind": "Video", "description": "Vasculitis is a group of medical conditions which cause damage to the blood vessels through inflammation. Depending on which blood vessels are affected, vasculitis can be classified as large vessel, medium vessel, or small vessel vasculitis. Learn about the signs and symptoms of vasculitis such as purpura, bloody stool and urine, and bruits.", "slug": "what-is-vasculitis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/vasculitis-pathophysiology/", "id": "cf_i8LicBEY", "title": "Vasculitis pathophysiology", "kind": "Video", "description": "Vasculitis occurs when antibodies (part of the immune system of the body) accidentally mistake the proteins on blood vessels to be foreign (don\u2019t belong in the body). The immune system attacks the blood vessel cells and damages them. Learn how fibrinoid necrosis occurs to the blood vessels, and how the build up of fibrin impairs blood flow.", "slug": "vasculitis-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/temporal-arteritis/", "id": "UtIFoMuyh_4", "title": "Temporal arteritis", "kind": "Video", "description": "Temporal arteritis (otherwise known as giant-cell arteritis) is a type of vasculitis that affects medium to large arteries in the head. Patients with temporal arteritis can have symptoms like migraines and sudden vision problems. Learn how health care professionals diagnosis temporal arteritis by examining blood work (such as erythrocyte sedimentation rate, granulomas) and taking samples (biopsies) of vascular tissue.", "slug": "temporal-arteritis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/takayasu-arteritis/", "id": "VdaTuNbyDHg", "title": "Takayasu arteritis", "kind": "Video", "description": "Takayasu arteritis (also known as the pulseless disease) is a type of vasculitis that affects large arteries and leads to significant narrowing of the vasculature. Patients with takayasu arteritis can have symptoms like weak or absent pulses in extremities, widely varying blood pressures, and dizziness. Learn how health care professionals diagnosis takayasu arteritis by examining blood work (such as erythrocyte sedimentation rate, granulomas), and taking samples (biopsies) of vascular tissue,", "slug": "takayasu-arteritis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/polyarteritis-nodosa/", "id": "4bilImPrYE0", "title": "Polyarteritis nodosa", "kind": "Video", "description": "Polyarteritis nodosa is a type of vasculitis that affects small to medium arteries and leads to significant narrowing of the vasculature. Patients with polyarteritis nodosa can have symptoms like bloody diarrhea, skin lesions, and impaired motor function caused by neuropathy. Learn how health care professionals diagnose and treat polyarteritis nodosa by examining arteriograms and prescribing steroids.", "slug": "polyarteritis-nodosa"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/kawasaki-disease/", "id": "MK-dN5WVVrk", "title": "What is Kawasaki disease?", "kind": "Video", "description": "Kawasaki disease (also known as mucocutaneous lymph node syndrome) is a type of vasculitis that affects medium arteries. Patients with Kawasaki disease can have symptoms like rashes on the palms of hands, soles of feet, in the eyes, and on the tongue (called strawberry tongue).", "slug": "kawasaki-disease"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/kawasaki-disease-diagnosis-and-treatment/", "id": "6RpVjF4N8nY", "title": "Kawasaki disease: diagnosis and treatment", "kind": "Video", "description": "Kawasaki disease is diagnosed off the presence of symptoms rather than the results of tests. Symptoms include: conjunctivitis, rash, adenopathy, strawberry tongue, and rash on palms and soles of hands and feet. Four of these symptoms must be present, in addition to a fever which has lasted more than 5 days to confirm a diagnosis. Learn about atypical Kawasaki disease, and how health professional treat the disease using intravenous immunoglobulins (IVIG) and acetylsalicylic acid.", "slug": "kawasaki-disease-diagnosis-and-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/buerger-disease/", "id": "i9z6x1LbdW8", "title": "Buerger disease", "kind": "Video", "description": "Buerger disease (also known as the thromboangiitis obliterans) is a type of vasculitis that affects small and medium blood vessels and has been linked strongly to smoking. Buerger disease is characterised by poor blood flow through blood vessels due to inflammation and blood clotting. Symptoms typically include pain (claudication), increased sensitivity to cold, diminished pulses, and cyanosis. Gangrene is often a complication which may require amputation of the affected area. Learn how health care professionals diagnose Buerger disease using ultrasound and angiography.", "slug": "buerger-disease"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/wegeners-granulomatosis-and-microscopic-polyangiitis/", "id": "Ax98k35h_jk", "title": "Wegener\u2019s granulomatosis and microscopic polyangiitis", "kind": "Video", "description": "Wegener\u2019s granulomatosis (also known as granulomatosis with polyangiitis) is a type of vasculitis that affects small and medium blood vessels. Symptoms can include saddle nose deformity, chronic sinusitis, and collapsed trachea. Microscopic polyangiitis is similar to wegener\u2019s granulomatosis except it only affects small blood vessels in the lungs or kidneys. Learn how the presence of granulomas and antibodies (cANCA and pANCA) differentiate these two conditions.", "slug": "wegeners-granulomatosis-and-microscopic-polyangiitis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/churg-strauss-syndrome/", "id": "dE7aS-HPwKo", "title": "Churg-Strauss syndrome", "kind": "Video", "description": "Churg-Strauss syndrome (also known as eosinophilic granulomatosis with polyangiitis) is a type of vasculitis that affects small and medium blood vessels. Symptoms of this disease are similar to seasonal allergies, such as runny nose, cough, sneezing. Health professionals diagnosis Churg-Strauss syndrome by examining eosinophil levels and pANCA antibody levels, in addition to the presence of granulomas from a tissue sample (biopsy).", "slug": "churg-strauss-syndrome"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis/henoch-schonlein-purpura/", "id": "pZcNmGtp5SA", "title": "Henoch-Schonlein purpura", "kind": "Video", "description": "Henoch-Schonlein purpura (also known as anaphylactoid purpura) is a type of vasculitis that affects small blood vessels and characterized by elevated immunoglobulin A (IgA). Symptoms of this disease include skin lesions, joint pain, blood in urine (hematuria), and abdominal pain. Health professionals diagnosis Henoch-Schonlein purpura through blood tests (elevated IgA). This disease is often treated with steroids.", "slug": "henoch-schonlein-purpura"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-vasculitis", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-vasculitis", "kind": "Topic", "slug": "rn-vasculitis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/", "id": "rn-cardiomyopathy", "hide": false, "title": "Cardiomyopathy", "child_data": [{"kind": "Video", "id": "xb595eb1f"}, {"kind": "Video", "id": "x4d3d3ac5"}, {"kind": "Video", "id": "x5a7a03c4"}, {"kind": "Video", "id": "xa9eadb1b"}, {"kind": "Video", "id": "x3094b9da"}, {"kind": "Video", "id": "x10f7ae29"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/what-is-cardiomyopathy/", "id": "SXYeQDrH36Y", "title": "What is cardiomyopathy?", "kind": "Video", "slug": "what-is-cardiomyopathy"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/cardiomyopathy-signs-and-symptoms/", "id": "iL6aM2xFixU", "title": "Cardiomyopathy signs and symptoms", "kind": "Video", "slug": "cardiomyopathy-signs-and-symptoms"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/dilated-cardiomyopathy-pathophysiology-and-diagnosis/", "id": "ou3a7Htbrvw", "title": "Dilated cardiomyopathy: Pathophysiology and diagnosis", "kind": "Video", "slug": "dilated-cardiomyopathy-pathophysiology-and-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/hypertrophic-cardiomyopathy-pathophysiology-and-diagnosis/", "id": "VtqrKxJmBn4", "title": "Hypertrophic cardiomyopathy: Pathophysiology and diagnosis", "kind": "Video", "slug": "hypertrophic-cardiomyopathy-pathophysiology-and-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/restrictive-cardiomyopathy-pathophysiology-and-diagnosis/", "id": "CRfgLoV25tA", "title": "Restrictive cardiomyopathy: Pathophysiology and diagnosis", "kind": "Video", "slug": "restrictive-cardiomyopathy-pathophysiology-and-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy/cardiomyopathy-treatment/", "id": "ithdrJuSj3A", "title": "Cardiomyopathy treatment", "kind": "Video", "slug": "cardiomyopathy-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-cardiomyopathy", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-cardiomyopathy", "kind": "Topic", "slug": "rn-cardiomyopathy"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/", "id": "rn-myocarditis-and-pericarditis", "hide": false, "title": "Myocarditis and pericarditis", "child_data": [{"kind": "Video", "id": "xa70d6eb8"}, {"kind": "Video", "id": "x48ea3e50"}, {"kind": "Video", "id": "x39727935"}, {"kind": "Video", "id": "x3d99d06f"}, {"kind": "Video", "id": "xf79296dd"}, {"kind": "Video", "id": "x1634be12"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/what-is-myocarditis-and-pericarditis/", "id": "xL98lBuAn1A", "title": "What is myocarditis and pericarditis?", "kind": "Video", "slug": "what-is-myocarditis-and-pericarditis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/causes-of-myocarditis/", "id": "Ewif2XGL2a8", "title": "Causes of myocarditis", "kind": "Video", "slug": "causes-of-myocarditis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/causes-of-pericarditis/", "id": "Ij_ERo1Ashc", "title": "Causes of pericarditis", "kind": "Video", "slug": "causes-of-pericarditis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/diagnosis-of-myocarditis-and-pericarditis-part-1/", "id": "OwDXViQn6tw", "title": "Diagnosis of myocarditis and pericarditis (part 1)", "kind": "Video", "slug": "diagnosis-of-myocarditis-and-pericarditis-part-1"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/diagnosis-of-myocarditis-and-pericarditis-part-2/", "id": "R1y2m2OB1x0", "title": "Diagnosis of myocarditis and pericarditis (part 2)", "kind": "Video", "slug": "diagnosis-of-myocarditis-and-pericarditis-part-2"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis/treatment-of-myocarditis-and-pericarditis/", "id": "NpuvcuzXn9w", "title": "Myocarditis and pericarditis treatment", "kind": "Video", "slug": "treatment-of-myocarditis-and-pericarditis"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-myocarditis-and-pericarditis", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-myocarditis-and-pericarditis", "kind": "Topic", "slug": "rn-myocarditis-and-pericarditis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm/", "id": "rn-aortic-dissection-and-aneurysm", "hide": false, "title": "Aortic dissection and aneurysm", "child_data": [{"kind": "Video", "id": "x86c2425a"}, {"kind": "Video", "id": "xfb3b518b"}, {"kind": "Video", "id": "xc4f95b99"}, {"kind": "Video", "id": "x35318c31"}, {"kind": "Video", "id": "x91f8fd5d"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm/what-is-aortic-dissection/", "id": "PRl8TLUleZg", "title": "What is an aortic dissection?", "kind": "Video", "slug": "what-is-aortic-dissection"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm/thoracic-aortic-aneurysms/", "id": "xHUsdE880so", "title": "Thoracic aortic aneurysms", "kind": "Video", "slug": "thoracic-aortic-aneurysms"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm/abdominal-aortic-aneurysms/", "id": "P1paaFPcdak", "title": "Abdominal aortic aneurysms", "kind": "Video", "slug": "abdominal-aortic-aneurysms"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm/aortic-dissection-treatment/", "id": "JfZ38uHaTEk", "title": "Aortic dissection treatment", "kind": "Video", "slug": "aortic-dissection-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm/aneurysm-treatment/", "id": "VdQ6lAhKGTc", "title": "Aneurysm treatment", "kind": "Video", "slug": "aneurysm-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-aortic-dissection-and-aneurysm", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-aortic-dissection-and-aneurysm", "kind": "Topic", "slug": "rn-aortic-dissection-and-aneurysm"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/", "id": "rn-heart-valve-diseases", "hide": false, "title": "Heart valve diseases", "child_data": [{"kind": "Video", "id": "xead4cc55"}, {"kind": "Video", "id": "x3932133b"}, {"kind": "Video", "id": "xcf2aa2d0"}, {"kind": "Video", "id": "x8106743a"}, {"kind": "Video", "id": "x6a5247b5"}, {"kind": "Video", "id": "x0693030b"}, {"kind": "Video", "id": "x3ea51c9d"}, {"kind": "Video", "id": "x0957c542"}, {"kind": "Video", "id": "x665cc3fc"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/what-is-valvular-heart-disease/", "id": "Wyxz0fgp6-A", "title": "What is valvular heart disease?", "kind": "Video", "slug": "what-is-valvular-heart-disease"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/valvular-heart-disease-causes/", "id": "R4qy9beFpHw", "title": "Valvular heart disease causes", "kind": "Video", "slug": "valvular-heart-disease-causes"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/how-to-identify-murmurs/", "id": "sGHV5_ieDP4", "title": "How to identify murmurs", "kind": "Video", "slug": "how-to-identify-murmurs"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-1/", "id": "6YY3OOPmUDA", "title": "Systolic murmurs, diastolic murmurs, and extra heart sounds - Part 1", "kind": "Video", "slug": "systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-1"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-2/", "id": "ZUHpAaVpiY8", "title": "Systolic murmurs, diastolic murmurs, and extra heart sounds - Part 2", "kind": "Video", "slug": "systolic-murmurs-diastolic-murmurs-and-extra-heart-sounds-part-2"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/aortic-stenosis-and-aortic-regurgitation/", "id": "3t1n5szXriQ", "title": "Aortic stenosis and aortic regurgitation", "kind": "Video", "slug": "aortic-stenosis-and-aortic-regurgitation"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/mitral-valve-regurgitation-and-mitral-valve-prolapse/", "id": "Bjnw_jwDt1Q", "title": "Mitral valve regurgitation and mitral valve prolapse", "kind": "Video", "slug": "mitral-valve-regurgitation-and-mitral-valve-prolapse"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/mitral-stenosis/", "id": "0k0iKKF2-Do", "title": "Mitral stenosis", "kind": "Video", "slug": "mitral-stenosis"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases/valvular-heart-disease-diagnosis-and-treatment/", "id": "8HSeHRGihkY", "title": "Valvular heart disease diagnosis and treatment", "kind": "Video", "slug": "valvular-heart-disease-diagnosis-and-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-heart-valve-diseases", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-heart-valve-diseases", "kind": "Topic", "slug": "rn-heart-valve-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/", "id": "rn-shock-2", "hide": false, "title": "Shock", "child_data": [{"kind": "Video", "id": "x5eb6c03b"}, {"kind": "Video", "id": "xd1ddf33e"}, {"kind": "Video", "id": "x6aaf4c04"}, {"kind": "Video", "id": "x7e3f12ec"}, {"kind": "Video", "id": "xdf9dea7e"}, {"kind": "Video", "id": "xea18a85a"}, {"kind": "Video", "id": "x5578b14a"}, {"kind": "Video", "id": "x4e45e31c"}, {"kind": "Video", "id": "x57602ead"}, {"kind": "Video", "id": "x3c240739"}, {"kind": "Video", "id": "x726728d4"}, {"kind": "Video", "id": "xff9b0304"}, {"kind": "Video", "id": "x1883374a"}, {"kind": "Video", "id": "x2835caa2"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/what-is-shock/", "id": "AvtS_IrlbYk", "title": "What is shock?", "kind": "Video", "slug": "what-is-shock"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/shock-hemodynamics/", "id": "j_s5p0mLZ7s", "title": "Shock - hemodynamics", "kind": "Video", "slug": "shock-hemodynamics"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/shock-diagnosis-and-treatment/", "id": "_eBq2hRETmA", "title": "Shock - diagnosis and treatment", "kind": "Video", "slug": "shock-diagnosis-and-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/shock-oxygen-delivery-and-metabolism/", "id": "iRjCDGpjJ3I", "title": "Shock - oxygen delivery and metabolism", "kind": "Video", "slug": "shock-oxygen-delivery-and-metabolism"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/cardiogenic-shock/", "id": "-0zm323sehQ", "title": "Cardiogenic shock", "kind": "Video", "slug": "cardiogenic-shock"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/sepsis-sirs-mods/", "id": "emOgJCoUy6Q", "title": "Sepsis: Systemic inflammatory response syndrome (SIRS) to multiple organ dysfunction syndrome (MODS)", "kind": "Video", "slug": "sepsis-sirs-mods"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/septic-shock-pathophysiology-and-symptoms/", "id": "-bt-H5VQl5E", "title": "Septic shock - pathophysiology and symptoms", "kind": "Video", "slug": "septic-shock-pathophysiology-and-symptoms"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/septic-shock-diagnosis-and-treatment/", "id": "ExJC8AoAczE", "title": "Septic shock: Diagnosis and treatment", "kind": "Video", "slug": "septic-shock-diagnosis-and-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/hypovolemic-shock/", "id": "wbfDqHk-ryM", "title": "Hypovolemic shock", "kind": "Video", "slug": "hypovolemic-shock"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/neurogenic-shock/", "id": "-Y3CbsxhlQE", "title": "Neurogenic shock", "kind": "Video", "slug": "neurogenic-shock"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/obstructive-shock/", "id": "iEVciE2j6ZA", "title": "Obstructive shock", "kind": "Video", "slug": "obstructive-shock"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/anaphylactic-shock/", "id": "sX97LcDpgzo", "title": "Anaphylactic shock", "kind": "Video", "slug": "anaphylactic-shock"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/dissociative-shock/", "id": "Phu1yteO-HU", "title": "Dissociative shock", "kind": "Video", "slug": "dissociative-shock"}, {"path": "khan/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2/differentiating-shock/", "id": "CYoxfm0kcsQ", "title": "Differentiating shock", "kind": "Video", "slug": "differentiating-shock"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-shock-2", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases/rn-shock-2", "kind": "Topic", "slug": "rn-shock-2"}], "in_knowledge_map": false, "description": "With the heart pumping 24 hours a day, 7 days a week, it\u2019s absolutely vital to make sure things are flowing smoothly (pun intended!). Unfortunately, this isn\u2019t always the case, and different parts of the circulatory system can cause problems: your heart, your blood vessels, and even the fluid in your tissues and blood itself can be the issue. To further complicate things, the underlying reasons for circulatory system problems vary from your genes (nature) to your lifestyle habits (nurture). An understanding of how different diseases can affect your circulatory system is important to combat this growing problem in the world.", "node_slug": "rn-cardiovascular-diseases", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-cardiovascular-diseases", "extended_slug": "test-prep/nclex-rn/rn-cardiovascular-diseases", "kind": "Topic", "slug": "rn-cardiovascular-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system/", "id": "rn-respiratory-system", "hide": false, "title": "Respiratory system physiology", "child_data": [{"kind": "Topic", "id": "x71ecf91c"}, {"kind": "Topic", "id": "xee2c3c38"}, {"kind": "Topic", "id": "x28a19c00"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/", "id": "rn-the-respiratory-system", "hide": false, "title": "Respiratory system introduction", "child_data": [{"kind": "Video", "id": "1150539313"}, {"kind": "Video", "id": "1179650621"}, {"kind": "Video", "id": "1179655597"}, {"kind": "Video", "id": "xeab45ce1"}, {"kind": "Video", "id": "x33409079"}, {"kind": "Video", "id": "x0f010548"}, {"kind": "Video", "id": "x536c7d31"}, {"kind": "Video", "id": "x775cfe3b"}, {"kind": "Video", "id": "xc69180a5"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/meet-the-lungs/", "id": "qGiPZf7njqY", "title": "Meet the lungs", "kind": "Video", "description": "Every time you take a breath, oxygen makes it way into your lungs. Follow along on that journey! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-lungs"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/inhaling-and-exhaling/", "id": "mykrnTh1tz8", "title": "Inhaling and exhaling", "kind": "Video", "description": "Find out exactly why air goes in and out of the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "inhaling-and-exhaling"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/how-does-lung-volume-change/", "id": "dTsUyXXudvA", "title": "How does lung volume change?", "kind": "Video", "description": "Learn about how muscle contraction and lung recoil actually help the lungs change their volume with every breath! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "how-does-lung-volume-change"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/o2-and-co2-solubility/", "id": "OCD4Dr3kmmA", "title": "O2 and CO2 solubility", "kind": "Video", "description": "Get an intuition for why carbon dioxide is so much more soluble than oxygen when it goes into water. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "o2-and-co2-solubility"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/henry-s-law/", "id": "Wiuat7KdMmA", "title": "Henry's law", "kind": "Video", "description": "Explore the relationship between partial pressure of a gas and the concentration of the gas molecule within a liquid. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "henry-s-law"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/fick-s-law-of-diffusion/", "id": "Cg4KlmI_acs", "title": "Fick's law of diffusion", "kind": "Video", "description": "Learn all of the different ways to maximize the amount of particles that diffuse over a short distance over time. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "fick-s-law-of-diffusion"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/oxygen-movement-from-alveoli-to-capillaries/", "id": "nRpwdwm06Ic", "title": "Oxygen movement from alveoli to capillaries", "kind": "Video", "description": "Watch as a molecule of oxygen makes its way from the alveoli (gas layer) through various liquid layers in order to end up in the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "oxygen-movement-from-alveoli-to-capillaries"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/the-respiratory-center/", "id": "_BFDgTci0ck", "title": "The respiratory center", "kind": "Video", "description": "Find out how the respiratory center collects information from all over the body and then helps regulate your breathing. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-respiratory-center"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/thermoregulation-in-the-lungs/", "id": "Iya-2bS14ho", "title": "Thermoregulation in the lungs", "kind": "Video", "slug": "thermoregulation-in-the-lungs"}], "in_knowledge_map": false, "description": "Did you know that your right lung is larger than your left? That\u2019s because the majority of your heart is on the left side of your body, and your left lung is slightly smaller to accommodate it. The lungs take in oxygen and help you breathe out carbon dioxide. Humans have an intricate respiratory system, with hundreds of millions of tiny air sacs called alveoli, where all of the magic happens. These videos will introduce you to the lungs, and show how they help you survive.", "node_slug": "rn-the-respiratory-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system", "kind": "Topic", "slug": "rn-the-respiratory-system"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/", "id": "Gas Exchange", "hide": false, "title": "Gas Exchange", "child_data": [{"kind": "Video", "id": "x8fbef923"}, {"kind": "Video", "id": "x074ad05b"}, {"kind": "Video", "id": "x33409079"}, {"kind": "Video", "id": "xeab45ce1"}, {"kind": "Video", "id": "x934cb9f8"}, {"kind": "Video", "id": "x0f010548"}, {"kind": "Video", "id": "x536c7d31"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/alveolar-gas-equation-part-1/", "id": "zZX9jJqSlQs", "title": "Alveolar gas equation - part 1", "kind": "Video", "description": "Find out how to calculate exactly how much oxygen is deep down inside your lungs! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "alveolar-gas-equation-part-1"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/alveolar-gas-equation-part-2/", "id": "xH5Y3Kmx82w", "title": "Alveolar gas equation - part 2", "kind": "Video", "description": "Find out how to calculate exactly how much oxygen is deep down inside your lungs! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "alveolar-gas-equation-part-2"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/henry-s-law/", "id": "Wiuat7KdMmA", "title": "Henry's law", "kind": "Video", "description": "Explore the relationship between partial pressure of a gas and the concentration of the gas molecule within a liquid. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "henry-s-law"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/o2-and-co2-solubility/", "id": "OCD4Dr3kmmA", "title": "O2 and CO2 solubility", "kind": "Video", "description": "Get an intuition for why carbon dioxide is so much more soluble than oxygen when it goes into water. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "o2-and-co2-solubility"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/graham-s-law-of-diffusion/", "id": "g6QuuoTs2Oo", "title": "Graham's law of diffusion", "kind": "Video", "description": "Find out whether oxygen or carbon dioxide has a higher rate of diffusion (Hint: It pays to be small!). Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "graham-s-law-of-diffusion"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/fick-s-law-of-diffusion/", "id": "Cg4KlmI_acs", "title": "Fick's law of diffusion", "kind": "Video", "description": "Learn all of the different ways to maximize the amount of particles that diffuse over a short distance over time. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "fick-s-law-of-diffusion"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/gas-exchange/oxygen-movement-from-alveoli-to-capillaries/", "id": "nRpwdwm06Ic", "title": "Oxygen movement from alveoli to capillaries", "kind": "Video", "description": "Watch as a molecule of oxygen makes its way from the alveoli (gas layer) through various liquid layers in order to end up in the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "oxygen-movement-from-alveoli-to-capillaries"}], "in_knowledge_map": false, "description": "If you think of your lungs as a mini factory, you can think of the gases as goods that your body trades. Humans need oxygen for important metabolic activities. For example, when you exercise, your breathe more because your body needs more oxygen! These metabolic activities produce carbon dioxide, which is something your body needs to get rid of to avoid blood acidity. So, keeping with the example of your lungs as a factory, oxygen is an import good, and carbon dioxide is an export good! Learn more about the specific mechanisms of this \u201cgoods exchange\u201d in the tiny air sacs of the lungs: the alveoli.", "node_slug": "Gas Exchange", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system/Gas Exchange", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system/Gas Exchange", "kind": "Topic", "slug": "gas-exchange"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system/breathing-control/", "id": "Breathing Control", "hide": false, "title": "Breathing Control", "child_data": [{"kind": "Video", "id": "x8b9eb0eb"}, {"kind": "Video", "id": "x03a3321c"}, {"kind": "Video", "id": "x775cfe3b"}, {"kind": "Video", "id": "xb6078c7d"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system/breathing-control/peripheral-chemoreceptors/", "id": "cJXY3Cywrnc", "title": "Peripheral chemoreceptors", "kind": "Video", "description": "Find out how the your body uses special cells that are peripheral to the brain (outside the brain) to sense levels of O2, CO2, and pH. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "peripheral-chemoreceptors"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/breathing-control/central-chemoreceptors/", "id": "lVacrVMmJX8", "title": "Central chemoreceptors", "kind": "Video", "description": "Find out how the your body uses special cells that are central to the brain (inside the brain) to sense levels of CO2 and pH. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "central-chemoreceptors"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/breathing-control/the-respiratory-center/", "id": "_BFDgTci0ck", "title": "The respiratory center", "kind": "Video", "description": "Find out how the respiratory center collects information from all over the body and then helps regulate your breathing. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-respiratory-center"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system/breathing-control/sneeze-cough-and-hiccup/", "id": "V2vR5_B6C5I", "title": "Sneeze, cough, and hiccup", "kind": "Video", "description": "Learn how our brain receives information from mechanoreceptors and then responds by controlling muscles in a well-coordinated system, and how all of this can lead to a sneeze, a cough, or even a hiccup! Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "sneeze-cough-and-hiccup"}], "in_knowledge_map": false, "description": "Luckily, we can breathe without thinking which means that we have autonomic control of breathing. If we couldn\u2019t, we would risk dying if we went to sleep (look up Ondine\u2019s curse)! There are times when the body wants more oxygen (like during heavy exercise), and when the body wants less (like when we\u2019re resting). How does our body automatically seem to know when to inhale more, and when to inhale less? Also, if we do have autonomic control of breathing, how is it possible to also have conscious control of our breathing? These questions get to the fundamentals of breathing control.", "node_slug": "Breathing Control", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system/Breathing Control", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system/Breathing Control", "kind": "Topic", "slug": "breathing-control"}], "in_knowledge_map": false, "description": "Place your hand on your ribs and inhale deeply. You\u2019ll notice that your chest expands and your back straightens. As this occurs, air is rushing through your windpipe and branches off to either your left or right lung. After 20 to 30 more branch points, oxygen in the air ends up in the alveoli where it diffuses into the liquid that surrounds the alveoli, and slips into the blood. This microscopic gas exchange occurs rapidly, oxygen is taken into the body and carbon dioxide is removed from the body, and then you exhale. Learn more about the intricate and fascinating respiratory system in these videos!", "node_slug": "rn-respiratory-system", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system", "kind": "Topic", "slug": "rn-respiratory-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/", "id": "rn-respiratory-system-diseases", "hide": false, "title": "Respiratory system diseases", "child_data": [{"kind": "Topic", "id": "xd7e4fd9c"}, {"kind": "Topic", "id": "xe97dd3e6"}, {"kind": "Topic", "id": "x311e2f9c"}, {"kind": "Topic", "id": "xef9c608c"}, {"kind": "Topic", "id": "xdbea327c"}, {"kind": "Topic", "id": "x236f0c3a"}, {"kind": "Topic", "id": "xcc2d2ff2"}, {"kind": "Topic", "id": "x8f086c3c"}, {"kind": "Topic", "id": "x768bce00"}, {"kind": "Topic", "id": "xc1763486"}, {"kind": "Topic", "id": "x3b75e2a3"}, {"kind": "Topic", "id": "x065ec4c8"}, {"kind": "Topic", "id": "x5cfa861b"}, {"kind": "Topic", "id": "xaeda47f8"}, {"kind": "Topic", "id": "x0b6057b4"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-intro-to-pulmonary-diseases/", "id": "rn-intro-to-pulmonary-diseases", "hide": false, "title": "Introduction to pulmonary diseases", "child_data": [{"kind": "Video", "id": "xa1ed35d5"}, {"kind": "Video", "id": "x6acd3776"}, {"kind": "Article", "id": "x207e925e"}, {"kind": "Video", "id": "x65173286"}, {"kind": "Article", "id": "xfb85d2f0"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-intro-to-pulmonary-diseases/types-of-pulmonary-diseases/", "id": "-oHlcuS7AeU", "title": "Types of pulmonary diseases", "kind": "Video", "description": "Learn what the main classifications of lung diseases are: obstructive, restrictive, ventilation, and perfusion. Discover the classification of common diseases like asthma, emphysema, and pneumonia.", "slug": "types-of-pulmonary-diseases"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-intro-to-pulmonary-diseases/respiratory-distress/", "id": "vO63j9m5grE", "title": "Respiratory distress", "kind": "Video", "description": "How can you tell someone is having troubles breathing? Increased work of breathing, the feeling of shortness of breath, and cyanosis are all common symptoms of respiratory distress. Learn what these symptoms look like and why they occur.", "slug": "respiratory-distress"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-intro-to-pulmonary-diseases/streptococcus-pneumoniae-and-flu-vaccines/", "id": "CNqYNgSYnKM", "title": "Streptococcus pneumoniae and flu vaccines", "kind": "Video", "description": "Why do we need a new flu vaccine every year? Learn about the pneumonia and flu vaccines and how they help your body fight off infection.", "slug": "streptococcus-pneumoniae-and-flu-vaccines"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-intro-to-pulmonary-diseases", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-intro-to-pulmonary-diseases", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-intro-to-pulmonary-diseases", "kind": "Topic", "slug": "rn-intro-to-pulmonary-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/", "id": "rn-asthma", "hide": false, "title": "Asthma", "child_data": [{"kind": "Video", "id": "xd1b3a606"}, {"kind": "Video", "id": "x2585cbb7"}, {"kind": "Video", "id": "x5805eb61"}, {"kind": "Video", "id": "x1bfa7631"}, {"kind": "Video", "id": "x110c3789"}, {"kind": "Video", "id": "xe4b7fb20"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/what-is-asthma/", "id": "uX1RzoE_9BI", "title": "What is asthma?", "kind": "Video", "slug": "what-is-asthma"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/asthma-pathophysiology/", "id": "ZKvatbn4a_I", "title": "Asthma pathophysiology", "kind": "Video", "slug": "asthma-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/asthma-diagnosis/", "id": "QsqnJHggDaY", "title": "Asthma diagnosis", "kind": "Video", "slug": "asthma-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/asthma-severity/", "id": "FckjcoZDxbE", "title": "Asthma severity", "kind": "Video", "slug": "asthma-severity"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/asthma-shortterm-treatment/", "id": "aUUi1DrghQc", "title": "Asthma shortterm treatments", "kind": "Video", "slug": "asthma-shortterm-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma/asthma-longterm-treatment/", "id": "lEXuBpu8jys", "title": "Asthma longterm treatment", "kind": "Video", "slug": "asthma-longterm-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-asthma", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-asthma", "kind": "Topic", "slug": "rn-asthma"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/", "id": "rn-emphysema", "hide": false, "title": "Emphysema (COPD)", "child_data": [{"kind": "Video", "id": "x2ef42ceb"}, {"kind": "Video", "id": "xd834c716"}, {"kind": "Video", "id": "xebf788f4"}, {"kind": "Video", "id": "x79f98264"}, {"kind": "Video", "id": "x5edcd88c"}, {"kind": "Video", "id": "x900a1024"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/what-is-emphysema/", "id": "laBUtu_QEEE", "title": "What is emphysema?", "kind": "Video", "description": "Emphysema is a chronic medical condition (most often caused by smoking and air pollution) where lung tissue is damaged and traps air inside the lung. Learn how shortness of breath, persistent cough, and wheezing are common symptoms of this condition and why they occur in emphysema.", "slug": "what-is-emphysema"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/emphysema-pathophysiology/", "id": "OiSTT4z4zJI", "title": "Emphysema pathophysiology", "kind": "Video", "description": "Smoking and air pollution cause the alveoli in the lungs stiff and less stretchy, making it difficult for air to escape during exhalation. Learn how the destruction of the protein elastin is key to the progression of emphysema, and how the over production of elastase occurs.", "slug": "emphysema-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/emphysema-diagnosis/", "id": "prL5WuhGPLI", "title": "Emphysema diagnosis", "kind": "Video", "description": "How do we know a patient has emphysema? Learn how the lungs in chest x-rays look hyperinflated, how spirometry can reveal decreased lung function, and what all those blood tests mean.", "slug": "emphysema-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/dlco/", "id": "oOkNS-vvnhQ", "title": "Diffusing capacity of the lung for carbon monoxide (DLCO)", "kind": "Video", "description": "Diffusing capacity of the lungs for carbon monoxide (DLCO) is a medical test that determines how much oxygen travels from the alveoli of the lungs to the blood stream. Learn what DLCO is, how DLCO a good measure of lung disease severity, and why we use carbon monoxide instead of oxygen or carbon dioxide.", "slug": "dlco"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/centriacinar-panacinar-emphysema/", "id": "36dg_h4gwNk", "title": "Centriacinar emphysema vs panacinar emphysema", "kind": "Video", "description": "Centriacinar and panacinar are different classifications of disease emphysema based on the location of the damaged lung tissue. Learn how inflammation can give rise to centriacinar emphysema, and how a deficiency in alpha-1-antitrypsin can lead to panacinar emphysema.", "slug": "centriacinar-panacinar-emphysema"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema/emphysema-treatment/", "id": "EIm1BSVCpno", "title": "Emphysema treatment", "kind": "Video", "description": "The best way to prevent and manage emphysema is to stop smoking. Learn how drugs such as bronchodilators, antibiotics, and steroids can be used to manage the symptoms of emphysema.", "slug": "emphysema-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-emphysema", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-emphysema", "kind": "Topic", "slug": "rn-emphysema"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-chronic-bronchitis/", "id": "rn-chronic-bronchitis", "hide": false, "title": "Chronic bronchitis (COPD)", "child_data": [{"kind": "Video", "id": "x6c8172ca"}, {"kind": "Video", "id": "x842ae588"}, {"kind": "Video", "id": "xb2de5e82"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-chronic-bronchitis/rn-what-is-chronic-bronchitis/", "id": "B5e7RMaz4IQ", "title": "What is chronic bronchitis?", "kind": "Video", "slug": "rn-what-is-chronic-bronchitis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-chronic-bronchitis/rn-chronic-bronchitis-pathophysiology/", "id": "A1XyF5clLbI", "title": "Chronic bronchitis pathophysiology", "kind": "Video", "slug": "rn-chronic-bronchitis-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-chronic-bronchitis/chronic-bronchitis-treatment/", "id": "iG7dJTInT7E", "title": "Chronic bronchitis treatment", "kind": "Video", "slug": "chronic-bronchitis-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-chronic-bronchitis", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-chronic-bronchitis", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-chronic-bronchitis", "kind": "Topic", "slug": "rn-chronic-bronchitis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-cystic-fibrosis/", "id": "rn-cystic-fibrosis", "hide": false, "title": "Cystic fibrosis", "child_data": [{"kind": "Video", "id": "x0b6640c4"}, {"kind": "Video", "id": "x6d185d1c"}, {"kind": "Video", "id": "x2a009823"}, {"kind": "Video", "id": "x043ac475"}, {"kind": "Video", "id": "x2e959b1c"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-cystic-fibrosis/what-is-cystic-fibrosis/", "id": "ucbxYIVztz8", "title": "What is cystic fibrosis?", "kind": "Video", "slug": "what-is-cystic-fibrosis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-cystic-fibrosis/cystic-fibrosis-pathophysiology/", "id": "cu6rfyEMFiQ", "title": "Cystic fibrosis pathophysiology", "kind": "Video", "slug": "cystic-fibrosis-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-cystic-fibrosis/cystic-fibrosis-diagnosis/", "id": "J0tYHmuig-U", "title": "Cystic fibrosis diagnosis", "kind": "Video", "slug": "cystic-fibrosis-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-cystic-fibrosis/cystic-fibrosis-treatment/", "id": "Icakt3gQDtE", "title": "Cystic fibrosis treatments", "kind": "Video", "slug": "cystic-fibrosis-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-cystic-fibrosis/cystic-fibrosis-complications/", "id": "0mdS4GH7Lkw", "title": "Cystic fibrosis complications", "kind": "Video", "slug": "cystic-fibrosis-complications"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-cystic-fibrosis", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-cystic-fibrosis", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-cystic-fibrosis", "kind": "Topic", "slug": "rn-cystic-fibrosis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-bronchiolitis/", "id": "rn-bronchiolitis", "hide": false, "title": "Bronchiolitis", "child_data": [{"kind": "Video", "id": "x4db9007c"}, {"kind": "Video", "id": "x9bb435b9"}, {"kind": "Video", "id": "xbdc2d0e0"}, {"kind": "Video", "id": "x05186a89"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-bronchiolitis/what-is-bronchiolitis/", "id": "65y1SKgRtOc", "title": "What is bronchiolitis?", "kind": "Video", "slug": "what-is-bronchiolitis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-bronchiolitis/bronchiolitis-pathophysiology/", "id": "9EZuhlSNUv0", "title": "Bronchiolitis pathophysiology", "kind": "Video", "slug": "bronchiolitis-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-bronchiolitis/bronchiolitis-diagnosis/", "id": "mObmS7E75t8", "title": "Bronchiolitis diagnosis", "kind": "Video", "slug": "bronchiolitis-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-bronchiolitis/bronchiolitis-treatment/", "id": "qjhlt6G-Azo", "title": "Bronchiolitis treatment", "kind": "Video", "slug": "bronchiolitis-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-bronchiolitis", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-bronchiolitis", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-bronchiolitis", "kind": "Topic", "slug": "rn-bronchiolitis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/", "id": "rn-lung-cancer", "hide": false, "title": "Lung cancer", "child_data": [{"kind": "Video", "id": "x920189c6"}, {"kind": "Video", "id": "xaacacdbf"}, {"kind": "Video", "id": "xd3bc0185"}, {"kind": "Video", "id": "x72f2595e"}, {"kind": "Video", "id": "x2debdc5f"}, {"kind": "Video", "id": "xc2622da8"}, {"kind": "Video", "id": "x95d53ece"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/what-is-lung-cancer/", "id": "MhavOq8O0Ho", "title": "What is lung cancer?", "kind": "Video", "description": "Lung cancer is a disease where cells in the lungs multiply uncontrollably. The extra cells take up space in the lungs and impair gas exchange and the lung\u2019s ability to expel dirt. Learn how smoking, radon gas, and air pollution increase the risk of lung cancer.", "slug": "what-is-lung-cancer"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-diagnosis/", "id": "JS3wsNY17LY", "title": "Lung cancer diagnosis", "kind": "Video", "description": "How do we know a patient has lung cancer? Learn how health professionals use x-rays, computed tomography (CT scans), positron emission tomography (PET scans), and blood results to confirm lung cancer in patients.", "slug": "lung-cancer-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-types/", "id": "QKUOYpsbROk", "title": "Lung cancer types", "kind": "Video", "description": "There are several different types of lung cancer, such as small cell lung cancer, non-small cell lung cancer, adenocarcinoma, squamous cell carcinoma, large cell carcinoma, and carcinoid . Learn how each type of lung cancer occurs, and how common they are amongst other lung cancers.", "slug": "lung-cancer-types"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-complications/", "id": "TkZ5IywDBnQ", "title": "Lung cancer complications", "kind": "Video", "description": "Learn how the mass of a tumor, the spread of cancer cells, the immune system\u2019s response, and the hormones released from cancer cells contribute to the complications of lung cancer.", "slug": "lung-cancer-complications"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-metastasis/", "id": "1jLifFl9HLA", "title": "Lung cancer metastasis", "kind": "Video", "description": "Metastasis is the spread of cancer cells from one area of the body (such as an organ) to another. As cancerous cells multiply, some cells may find their way into the circulating blood or lymphatic systems, where they\u2019re transported around the rest of the body. They may eventually land in another organ where they continue to multiply and spread.", "slug": "lung-cancer-metastasis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-stages/", "id": "rAxbnfKXcoE", "title": "Lung cancer staging", "kind": "Video", "description": "Health professionals use special terminology referred to as stages to concisely communicate the progression of cancer disease. Learn how cancer is classified based off the size of the tumor, the involvement of lymph nodes, and whether metastasis has occurred.", "slug": "lung-cancer-stages"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer/lung-cancer-treatment/", "id": "trRl8QXtdMI", "title": "Lung cancer treatment", "kind": "Video", "description": "Lung cancer is treated using a combination of treatments such as chemotherapy, radiation, and a variety of surgical procedures (such as wedge resections, pneumonectomies, and segmental resections). Learn about the complications and side effects of treatment options and why they occur.", "slug": "lung-cancer-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-lung-cancer", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-lung-cancer", "kind": "Topic", "slug": "rn-lung-cancer"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia/", "id": "rn-pneumonia", "hide": false, "title": "Pneumonia", "child_data": [{"kind": "Video", "id": "x5f142e16"}, {"kind": "Video", "id": "x3ebec828"}, {"kind": "Video", "id": "x65173286"}, {"kind": "Video", "id": "x15d69db0"}, {"kind": "Video", "id": "xa3e99595"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia/what-is-pneumonia/", "id": "dzJNabJAPaE", "title": "What is pneumonia?", "kind": "Video", "description": "Pneumonia is a medical condition where lung tissue becomes inflamed, usually caused by a virus or bacteria. Learn how shortness of breath, cough, and fever are common symptoms of this condition and why they occur in pneumonia.", "slug": "what-is-pneumonia"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia/pneumonia-diagnosis-and-treatment/", "id": "0xvaYVoBwzU", "title": "Pneumonia diagnosis and treatment", "kind": "Video", "description": "How do we know a patient has pneumonia? Learn what the lungs in chest x-rays look like, what a bronchoscopy is, and what certain blood tests mean!", "slug": "pneumonia-diagnosis-and-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia/streptococcus-pneumoniae-and-flu-vaccines/", "id": "CNqYNgSYnKM", "title": "Streptococcus pneumoniae and flu vaccines", "kind": "Video", "description": "Why do we need a new flu vaccine every year? Learn about the pneumonia and flu vaccines and how they help your body fight off infection.", "slug": "streptococcus-pneumoniae-and-flu-vaccines"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia/lung-abscess/", "id": "X1h5kr55SZg", "title": "Pulmonary abscess", "kind": "Video", "description": "Pulmonary abscesses occur when part of the lung tissue dies (caused by damage or infection) and gets trapped in a layer of hard tissue in the lung. Learn what causes abscesses, how they are diagnosed, and how health professionals treat them.", "slug": "lung-abscess"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia/pneumonia-vs-pneumonitis/", "id": "q2SYtugUdpI", "title": "Pneumonia vs. pneumonitis", "kind": "Video", "description": "Pneumonitis is a term used to describe inflammation of the lung tissues without the presence of an infection, whereas pneumonia is inflammation caused by an infection. Learn what the symptoms of pneumonitis are, and why pneumonitis is more common with bird handlers, farmers, and people who regularly use humidifiers.", "slug": "pneumonia-vs-pneumonitis"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-pneumonia", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pneumonia", "kind": "Topic", "slug": "rn-pneumonia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pleural-effusion/", "id": "rn-pleural-effusion", "hide": false, "title": "Pleural effusion", "child_data": [{"kind": "Video", "id": "x38620935"}, {"kind": "Video", "id": "x749dedfd"}, {"kind": "Video", "id": "x73951981"}, {"kind": "Video", "id": "xfea39199"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pleural-effusion/what-is-pleural-effusion/", "id": "IDLCwhijNG4", "title": "What is a pleural effusion?", "kind": "Video", "description": "Pleural effusions are when excess fluid get caught between two layers of tissue (the visceral and parietal pleurae) surrounding the lungs. This fluid can build up over time, taking up space in the lung and impairing a person\u2019s ability to breath. Learn about the signs and symptoms of pleural effusions such as chest pain, shortness of breath, and dry coughing.", "slug": "what-is-pleural-effusion"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pleural-effusion/pleural-effusion-diagnosis-and-treatment/", "id": "XaqsqtWiJMw", "title": "Pleural effusion diagnosis and treatment", "kind": "Video", "description": "How do we know a patient has a pleural effusion? Health professionals use x-rays, and computed tomography (CT scans) to look for extra fluid inside the body. Learn how pleural effusions are treated using techniques such as a thoracentesis, pleurodesis, and pleuroperitoneal shunts.", "slug": "pleural-effusion-diagnosis-and-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pleural-effusion/transudate-vs-exudate/", "id": "qCdNab2WLiw", "title": "Transudate vs exudate", "kind": "Video", "description": "In a pleural effusion, different fluids can enter the pleural cavity. Transudate is fluid pushed through the capillary due to high pressure within the capillary. Exudate is fluid that leaks around the cells of the capillaries caused by inflammation. Learn why transudative fluid does not contain proteins, why exudate does contain proteins, and how health professionals can differentiate between the two using Light\u2019s criteria.", "slug": "transudate-vs-exudate"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pleural-effusion/vein-artery-nerve-bundle/", "id": "9Y-7wohhcSU", "title": "Neurovascular bundle", "kind": "Video", "description": "The neurovascular bundles located underneath the ribs are small collections of blood vessels (veins and arteries) and nerves which supply the tissues of the chest wall. When procedures such as a thoracentesis are performed, health professionals must avoid hitting this bundle. If they do, the patient may have significant bleeding, hypotension, shock, and decreased respiratory function.", "slug": "vein-artery-nerve-bundle"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-pleural-effusion", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pleural-effusion", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pleural-effusion", "kind": "Topic", "slug": "rn-pleural-effusion"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/", "id": "rn-nose-sinus-upper-respiratory", "hide": false, "title": "Nose, sinus, and upper respiratory track infections", "child_data": [{"kind": "Video", "id": "x6c0e0dd2"}, {"kind": "Video", "id": "xedfc9f96"}, {"kind": "Video", "id": "x3aa4a901"}, {"kind": "Video", "id": "xd906e722"}, {"kind": "Video", "id": "x6aae64b2"}, {"kind": "Video", "id": "xa2243b1a"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/what-is-a-uri/", "id": "GoRhRJXp0j8", "title": "What is an upper respiratory infection (URI)?", "kind": "Video", "slug": "what-is-a-uri"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/what-is-allergic-rhinitis/", "id": "RFC3RP2jvxE", "title": "What is allergic rhinitis?", "kind": "Video", "slug": "what-is-allergic-rhinitis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/allergic-rhinitis-diagnosis-and-treatment/", "id": "Sh9uYq05zPk", "title": "Allergic rhinitis diagnosis and treatment", "kind": "Video", "slug": "allergic-rhinitis-diagnosis-and-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/nasal-polyps/", "id": "QmEwoBLCqZY", "title": "Nasal polyps", "kind": "Video", "slug": "nasal-polyps"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/what-is-sinusitis/", "id": "RywHs4kKxjA", "title": "What is sinusitis?", "kind": "Video", "slug": "what-is-sinusitis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory/sinusitis-diagnosis-and-treatment/", "id": "DGRnSnPSOqg", "title": "Sinusitis diagnosis and treatment", "kind": "Video", "slug": "sinusitis-diagnosis-and-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-nose-sinus-upper-respiratory", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-nose-sinus-upper-respiratory", "kind": "Topic", "slug": "rn-nose-sinus-upper-respiratory"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/", "id": "rn-laryngeal-conditions", "hide": false, "title": "Laryngeal conditions", "child_data": [{"kind": "Video", "id": "xbeec702c"}, {"kind": "Video", "id": "xc7637767"}, {"kind": "Video", "id": "xad6b576a"}, {"kind": "Video", "id": "x00e7bc89"}, {"kind": "Video", "id": "x4365a3b3"}, {"kind": "Video", "id": "x17410a65"}, {"kind": "Video", "id": "xa49e36fa"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/what-is-epiglottitis/", "id": "Tz-9z064euU", "title": "What is epiglottitis?", "kind": "Video", "slug": "what-is-epiglottitis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/epiglottitis-diagnosis-and-treatment/", "id": "_Md5nli5OII", "title": "Epiglottitis diagnosis and treatment", "kind": "Video", "slug": "epiglottitis-diagnosis-and-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/hib-vaccine/", "id": "TDQAd2N2Cls", "title": "Hib vaccine", "kind": "Video", "slug": "hib-vaccine"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/what-is-laryngitis/", "id": "puqe3_HkDZA", "title": "What is laryngitis ?", "kind": "Video", "slug": "what-is-laryngitis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/laryngitis-diagnosis-treatment-and-prevention/", "id": "M-9t4RrhKJE", "title": "Laryngitis diagnosis, treatment, and prevention", "kind": "Video", "slug": "laryngitis-diagnosis-treatment-and-prevention"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/laryngomalacia/", "id": "kOTdVMM9Lwg", "title": "Laryngomalacia", "kind": "Video", "slug": "laryngomalacia"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions/vocal-cord-growths/", "id": "t1-VVUmP0rY", "title": "Vocal cord growths", "kind": "Video", "slug": "vocal-cord-growths"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-laryngeal-conditions", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-laryngeal-conditions", "kind": "Topic", "slug": "rn-laryngeal-conditions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-occupational-lung-diseases/", "id": "rn-occupational-lung-diseases", "hide": false, "title": "Occupational lung diseases", "child_data": [{"kind": "Video", "id": "x5e4e6c48"}, {"kind": "Video", "id": "x651585fa"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-occupational-lung-diseases/occupational-asthma-and-mesothelioma/", "id": "AgQMgxkYk44", "title": "Occupational asthma and mesothelioma", "kind": "Video", "slug": "occupational-asthma-and-mesothelioma"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-occupational-lung-diseases/asbestosis-silicosis-sick-building-syndrome/", "id": "w1_EEi8-EaI", "title": "Asbestosis, silicosis, sick building syndrome", "kind": "Video", "slug": "asbestosis-silicosis-sick-building-syndrome"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-occupational-lung-diseases", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-occupational-lung-diseases", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-occupational-lung-diseases", "kind": "Topic", "slug": "rn-occupational-lung-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/", "id": "rn-pulmonary-hypertension", "hide": false, "title": "Pulmonary hypertension", "child_data": [{"kind": "Video", "id": "xb238d715"}, {"kind": "Video", "id": "x4c13a486"}, {"kind": "Video", "id": "x19726bc9"}, {"kind": "Video", "id": "xe82523a9"}, {"kind": "Video", "id": "x3fb3eca3"}, {"kind": "Video", "id": "xc9c2a5e7"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/what-is-pulmonary-hypertension/", "id": "KtkR_NTte4M", "title": "What is pulmonary hypertension?", "kind": "Video", "slug": "what-is-pulmonary-hypertension"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/pulmonary-hypertension-symptoms-and-causes/", "id": "ZVl1M3D2B80", "title": "Pulmonary hypertension symptoms and causes", "kind": "Video", "slug": "pulmonary-hypertension-symptoms-and-causes"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/hypoxic-vasoconstriction/", "id": "vZ9vwiGHXgY", "title": "Hypoxic vasoconstriction", "kind": "Video", "slug": "hypoxic-vasoconstriction"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/pulmonary-hypertension-diagnosis-swan-ganz-catheterization/", "id": "NZlJJ4a40Ww", "title": "Pulmonary hypertension diagnosis Swan Ganz catheterization", "kind": "Video", "slug": "pulmonary-hypertension-diagnosis-swan-ganz-catheterization"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/pulmonary-hypertension-diagnosis/", "id": "U7fKAYqfpC8", "title": "Pulmonary hypertension diagnosis", "kind": "Video", "slug": "pulmonary-hypertension-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension/pulmonary-hypertension-treatment/", "id": "RSMtgI8yyfg", "title": "Pulmonary hypertension treatment", "kind": "Video", "slug": "pulmonary-hypertension-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-pulmonary-hypertension", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pulmonary-hypertension", "kind": "Topic", "slug": "rn-pulmonary-hypertension"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions/", "id": "rn-throat-conditions", "hide": false, "title": "Throat conditions", "child_data": [{"kind": "Video", "id": "x37fc9527"}, {"kind": "Video", "id": "x6816e15a"}, {"kind": "Video", "id": "xcc3f4633"}, {"kind": "Video", "id": "x4f9280df"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions/tonsillitis/", "id": "_DNM039pUXE", "title": "Tonsillitis", "kind": "Video", "slug": "tonsillitis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions/pharyngitis/", "id": "v6-Ijv3wOAM", "title": "Pharyngitis", "kind": "Video", "slug": "pharyngitis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions/tonsillopharyngitis-complications-diagnosis-and-treatment/", "id": "EHEecXYsJ9w", "title": "Tonsillopharyngitis - Complications, diagnosis, and treatment", "kind": "Video", "slug": "tonsillopharyngitis-complications-diagnosis-and-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions/what-is-a-tonsillectomy/", "id": "fzF2AgL35qE", "title": "What is a tonsillectomy?", "kind": "Video", "slug": "what-is-a-tonsillectomy"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-throat-conditions", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-throat-conditions", "kind": "Topic", "slug": "rn-throat-conditions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis/", "id": "rn-pertussis", "hide": false, "title": "Pertussis", "child_data": [{"kind": "Video", "id": "xb8c0da6c"}, {"kind": "Video", "id": "xff4fb435"}, {"kind": "Video", "id": "xa516afdb"}, {"kind": "Video", "id": "x01e6835e"}, {"kind": "Video", "id": "x6440e097"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis/what-is-pertussis/", "id": "5tXV-8-6tw0", "title": "What is pertussis?", "kind": "Video", "slug": "what-is-pertussis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis/complications-of-pertussis/", "id": "qkVX03qMzb4", "title": "Pertussis complications", "kind": "Video", "slug": "complications-of-pertussis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis/pathophysiology-of-pertussis/", "id": "XLcyqs5vQHQ", "title": "Pathophysiology of pertussis", "kind": "Video", "slug": "pathophysiology-of-pertussis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis/diagnosing-and-treating-pertussis/", "id": "UgXZFel0H8Q", "title": "Pertussis diagnosis and treatment", "kind": "Video", "slug": "diagnosing-and-treating-pertussis"}, {"path": "khan/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis/pertussis-vaccine/", "id": "swQgTqphZzE", "title": "Pertussis vaccine", "kind": "Video", "slug": "pertussis-vaccine"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-pertussis", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases/rn-pertussis", "kind": "Topic", "slug": "rn-pertussis"}], "in_knowledge_map": false, "description": "Our lungs are composed of a bronchial tree (think of an upside down tree with millions of leaves), blood vessels bringing blood in and out, and a protein-rich fluid that forms a matrix holding everything together! If any part of this well-balanced organ isn\u2019t working properly, a person can be left feeling short of breath. The lungs are also exposed to the outside environment, making them prone to infections. To counter infections, the lungs are lined with cells that have tiny protein bristles which wave back and forth and can literally sweep away dangerous bacteria. Learn more about diseases of the lungs and how modern medicine helps to keep them healthy!", "node_slug": "rn-respiratory-system-diseases", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-respiratory-system-diseases", "extended_slug": "test-prep/nclex-rn/rn-respiratory-system-diseases", "kind": "Topic", "slug": "rn-respiratory-system-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/", "id": "hematologic-system-diseases", "hide": false, "title": "Hematologic system diseases", "child_data": [{"kind": "Topic", "id": "xdbb6aec5"}, {"kind": "Topic", "id": "x956b7be2"}, {"kind": "Topic", "id": "x7cf02be7"}, {"kind": "Topic", "id": "x180641c9"}, {"kind": "Topic", "id": "xa7e99432"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-anemia/", "id": "rn-anemia", "hide": false, "title": "Anemia", "child_data": [{"kind": "Article", "id": "x4a357b80"}, {"kind": "Video", "id": "xc4fcb753"}, {"kind": "Video", "id": "x2d20386e"}, {"kind": "Video", "id": "xe5403c9d"}], "children": [{"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-anemia/rn-anemia/", "id": "Ty6TfxCYPQI", "title": "What is anemia?", "kind": "Video", "slug": "rn-anemia"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-anemia/rn-anemia-pathophysiology/", "id": "LtlodYLm8fc", "title": "Anemia pathophysiology", "kind": "Video", "slug": "rn-anemia-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-anemia/rn-microcytic-normocytic-macrocytic-anemias/", "id": "3AMENlm4pOw", "title": "Microcytic, normocytic, and macrocytic anemias", "kind": "Video", "slug": "rn-microcytic-normocytic-macrocytic-anemias"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-anemia", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/hematologic-system-diseases/rn-anemia", "extended_slug": "test-prep/nclex-rn/hematologic-system-diseases/rn-anemia", "kind": "Topic", "slug": "rn-anemia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/", "id": "rn-leukemia", "hide": false, "title": "Leukemia", "child_data": [{"kind": "Video", "id": "xb7a9aa5b"}, {"kind": "Video", "id": "x301360c2"}, {"kind": "Video", "id": "x3ea29b42"}, {"kind": "Video", "id": "xaff601c9"}, {"kind": "Video", "id": "x6817687e"}, {"kind": "Video", "id": "x18ac2227"}, {"kind": "Video", "id": "x82136b61"}, {"kind": "Video", "id": "xa78c8eb4"}, {"kind": "Video", "id": "x200f6c35"}], "children": [{"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/hematopoiesis/", "id": "XVWOlKdpF_I", "title": "Hematopoiesis", "kind": "Video", "description": "Hematopoiesis is the process of creating new blood cells in the body. All blood cells start off as hematopoietic stem cells, and then specialize (differentiate) into myeloid cells (erythrocytes, megakaryocytes, monocytes, neutrophils, basophils, or eosinophils) or lymphoid cells (T-lymphocytes and B-lymphocytes).", "slug": "hematopoiesis"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/what-is-leukemia/", "id": "IB3iJUuxt1c", "title": "What is leukemia?", "kind": "Video", "description": "Leukemia is a collection of cancers which create a large amount of immature blood cells. These immature blood cells take up space in the bone marrow, preventing the bone marrow from making healthy blood cells such as platelets, red blood cells, and white blood cells. Learn about the symptoms of this disease which include prolonged bleeding, frequent infections, and bone pain.", "slug": "what-is-leukemia"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/leukemia-pathophysiology/", "id": "e1XCEJUqOQE", "title": "Leukemia pathophysiology", "kind": "Video", "description": "Sometimes an immature blast cell have two gene mutations which prevent it from maturing into a specialized blood cell and cause it to multiply out of control. These immature blast cells crowd the bone marrow and impair the ability of the bones to make healthy blood cells. This leads to a decrease in platelets, red blood cells (RBCs) and white blood cells (WBCs).", "slug": "leukemia-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/leukemia-diagnosis/", "id": "hTzI6x4fmGI", "title": "Leukemia diagnosis", "kind": "Video", "description": "Often health care professionals conduct a variety of blood tests to determine if someone has leukemia. Leukemia patients often have decreased levels of platelets, white blood cells (WBCs), red blood cells (RBCs), hematocrit, and hemoglobin. Other tests such as bone marrow aspirations can reveal an increase in immature blast cells. Learn how health professionals classify leukemia by staining sample tissue with a dye and by looking for chromosome translocation.", "slug": "leukemia-diagnosis"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/leukemia-classifications/", "id": "frUCL0snbPk", "title": "Leukemia classifications", "kind": "Video", "description": "Learn how leukemia can be classified as an acute or chronic and myeloid or lymphoid disease.", "slug": "leukemia-classifications"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/acute-leukemias/", "id": "lCRePFf4zNs", "title": "Acute leukemia", "kind": "Video", "description": "Acute leukemias affect specialized blood cells at the most immature stage in their growth. Acute lymphoblastic leukemias (ALL) are the most common cancer in children and is often associated with people who have down syndrome. Learn about B-cell ALL and T-cell ALL, as well as the different acute myeloid leukemias.", "slug": "acute-leukemias"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/chronic-leukemia/", "id": "5u2pDR634Fw", "title": "Chronic leukemia", "kind": "Video", "description": "Chronic leukemias affect specialized blood cells that are partially through the process of maturation. Chronic lymphoblastic leukemias (CLL) often cause an enlargement of the liver and spleen. Involvement of the lymph nodes in CLL is often called small lymphocytic lymphoma. Learn how small lymphocytic lymphoma can transition to diffuse B cell lymphoma.", "slug": "chronic-leukemia"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/myelodysplastic-syndrome/", "id": "7j6HcztlLdw", "title": "Myelodysplastic syndrome", "kind": "Video", "description": "Myelodysplastic syndrome is sometimes referred to as \u201cpre-leukemia\u201d or a condition that occurs before leukemia (although most patients will never develop leukemia). In myelodysplastic syndrome, the gene mutation preventing the maturation of the blast cell is present, however the second gene mutation leading to uncontrolled cell replication is absent. Learn how health professionals look at blood test results and bone marrow aspirates to diagnosis this disease.", "slug": "myelodysplastic-syndrome"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia/treatment-of-leukemia/", "id": "hH9AETxy6QI", "title": "Leukemia treatment", "kind": "Video", "description": "There are three main solutions to treat leukemia. Chemotherapy is a collection of drugs which target cells that rapidly multiply (a key characteristic in cancer). Radiation is often used on patients who are at a high risk of the leukemia entering the brain. For resistant leukemias, bone marrow transplantation is considered.", "slug": "treatment-of-leukemia"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-leukemia", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia", "extended_slug": "test-prep/nclex-rn/hematologic-system-diseases/rn-leukemia", "kind": "Topic", "slug": "rn-leukemia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-plasma-cell-dyscrasias/", "id": "rn-plasma-cell-dyscrasias", "hide": false, "title": "Plasma cell dyscrasias", "child_data": [{"kind": "Video", "id": "x2a45f7ca"}, {"kind": "Video", "id": "x04ad24c2"}, {"kind": "Video", "id": "xbdb0c7ab"}, {"kind": "Video", "id": "xce97ca61"}], "children": [{"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-plasma-cell-dyscrasias/what-are-plasma-cell-dyscrasias/", "id": "t3MxJEbJN3k", "title": "What are plasma cell dyscrasias?", "kind": "Video", "slug": "what-are-plasma-cell-dyscrasias"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-plasma-cell-dyscrasias/what-is-monoclonal-gammopathy-of-undetermined-significance-mgus/", "id": "K25N7ZfSaO0", "title": "What is Monoclonal gammopathy of undetermined significance (MGUS)?", "kind": "Video", "slug": "what-is-monoclonal-gammopathy-of-undetermined-significance-mgus"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-plasma-cell-dyscrasias/what-is-multiple-myeloma/", "id": "jdytgW5wKa4", "title": "What is multiple myeloma?", "kind": "Video", "slug": "what-is-multiple-myeloma"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-plasma-cell-dyscrasias/what-is-waldenstrom-macroglobulinemia/", "id": "Hod_JfGJPj4", "title": "What is waldenstrom macroglobulinemia?", "kind": "Video", "slug": "what-is-waldenstrom-macroglobulinemia"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-plasma-cell-dyscrasias", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/hematologic-system-diseases/rn-plasma-cell-dyscrasias", "extended_slug": "test-prep/nclex-rn/hematologic-system-diseases/rn-plasma-cell-dyscrasias", "kind": "Topic", "slug": "rn-plasma-cell-dyscrasias"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/", "id": "rn-iron-deficiency-anemia-and-anemia-of-chronic-disease", "hide": false, "title": "Iron deficiency anemia and anemia of chronic disease", "child_data": [{"kind": "Video", "id": "x16e2a2c6"}, {"kind": "Video", "id": "xad6df5ea"}, {"kind": "Video", "id": "x492c99e0"}, {"kind": "Video", "id": "x97673226"}, {"kind": "Video", "id": "xc1bce465"}, {"kind": "Video", "id": "x395f8547"}], "children": [{"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/what-is-iron-deficiency/", "id": "U1Ls9Vh-3m8", "title": "What is iron deficiency?", "kind": "Video", "slug": "what-is-iron-deficiency"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/microcytic-anemia/", "id": "4_410pxikS0", "title": "Microcytic anemia", "kind": "Video", "slug": "microcytic-anemia"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/iron-deficency-anemia-diagnosis/", "id": "2duGAcN0nqw", "title": "Iron deficency anemia diagnosis", "kind": "Video", "slug": "iron-deficency-anemia-diagnosis"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/anemia-of-chronic-disease/", "id": "EkFUb3L040E", "title": "Anemia of chronic disease", "kind": "Video", "slug": "anemia-of-chronic-disease"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/chronic-disease-vs-iron-deficiency-anemia/", "id": "tVNRn4srPUI", "title": "Chronic disease vs iron deficiency anemia", "kind": "Video", "slug": "chronic-disease-vs-iron-deficiency-anemia"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease/iron-deficiency-and-anemia-of-chronic-disease-treatment/", "id": "X3QUqRd18jc", "title": "Iron deficiency and anemia of chronic disease treatment", "kind": "Video", "slug": "iron-deficiency-and-anemia-of-chronic-disease-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-iron-deficiency-anemia-and-anemia-of-chronic-disease", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease", "extended_slug": "test-prep/nclex-rn/hematologic-system-diseases/rn-iron-deficiency-anemia-and-anemia-of-chronic-disease", "kind": "Topic", "slug": "rn-iron-deficiency-anemia-and-anemia-of-chronic-disease"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders/", "id": "rn-myeloproliferative-disorders", "hide": false, "title": "Myeloproliferative disorders", "child_data": [{"kind": "Video", "id": "x5aa31ada"}, {"kind": "Video", "id": "xc27514f7"}, {"kind": "Video", "id": "xa5808cfb"}, {"kind": "Video", "id": "x93f538b1"}, {"kind": "Video", "id": "x5ac104fb"}], "children": [{"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders/what-are-myeloproliferative-disorders/", "id": "eLsegxXzaiE", "title": "What are myeloproliferative disorders?", "kind": "Video", "description": "Learn about 4 different cancers that involve the bone marrow and produce a large number of cells in the blood stream. By Raja Narayan.\n\nVisit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-are-myeloproliferative-disorders"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders/what-is-polycythemia-vera/", "id": "vOPuAPCioE4", "title": "What is polycythemia vera?", "kind": "Video", "description": "Learn to recognize the symptoms of polycythemia vera as well as how to diagnosis and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-polycythemia-vera"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders/what-is-essential-thrombocythemia/", "id": "1POB_czE16k", "title": "What is essential thrombocythemia?", "kind": "Video", "description": "Learn what is essential thrombocythemia as well as how to identify its signs and symptoms, diagnose it, and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-essential-thrombocythemia"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders/what-is-chronic-myelogenous-leukemia/", "id": "ST6mSB-RvE0", "title": "What is chronic myelogenous leukemia?", "kind": "Video", "description": "Learn what is chronic myelogenous leukemia as well as how to identify its signs and symptoms, diagnose it, and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-chronic-myelogenous-leukemia"}, {"path": "khan/test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders/what-is-primary-myelofibrosis/", "id": "-YEtWOxweRg", "title": "What is primary myelofibrosis?", "kind": "Video", "description": "Learn what is primary myelofibrosis as well as how to identify its signs and symptoms, diagnose it, and treat it. By Raja Narayan. Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-primary-myelofibrosis"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-myeloproliferative-disorders", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders", "extended_slug": "test-prep/nclex-rn/hematologic-system-diseases/rn-myeloproliferative-disorders", "kind": "Topic", "slug": "rn-myeloproliferative-disorders"}], "in_knowledge_map": false, "description": "Blood is incredibly important in combating disease and the healing process after an injury. It acts as a highway for medicine, stops bleeding, fights infections, controls cells from multiplying too fast, and so much more. But things can go wrong with blood too! What if your blood couldn\u2019t clot and stop you from bleeding, or started to clot uncontrollably? What if your red blood cells or white blood cells suddenly disappeared? Blood contains many different types of tissues doing very different jobs, making diseases of the blood produce a variety of symptoms, including continuously feeling tired and bone pain. Learn about the different blood diseases, how they are diagnosed, and the cool ways health professionals treat these conditions.", "node_slug": "hematologic-system-diseases", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/hematologic-system-diseases", "extended_slug": "test-prep/nclex-rn/hematologic-system-diseases", "kind": "Topic", "slug": "hematologic-system-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-endocrine-system/", "id": "rn-endocrine-system", "hide": false, "title": "Endocrine system physiology", "child_data": [{"kind": "Topic", "id": "x3e0b88e0"}, {"kind": "Topic", "id": "xb0ca9fed"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/", "id": "rn-the-endocrine-system", "hide": false, "title": "Endocrine system introduction", "child_data": [{"kind": "Video", "id": "xaf2ad25b"}, {"kind": "Video", "id": "x26e9c294"}, {"kind": "Video", "id": "xcdd0a401"}, {"kind": "Video", "id": "x9ff1d77e"}, {"kind": "Video", "id": "xd4489fab"}, {"kind": "Video", "id": "x9f41189c"}, {"kind": "Video", "id": "x936343b7"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/endocrine-gland-hormone-review/", "id": "ER49EweKwW8", "title": "Endocrine gland hormone review", "kind": "Video", "description": "Welcome to the Endocrine System. Get ready to learn about one of the most important ways that our body parts communicate! By Ryan Patton.", "slug": "endocrine-gland-hormone-review"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/hypothalamus-and-pituitary-gland/", "id": "9dS7bc_2bUE", "title": "The hypothalamus and pituitary gland", "kind": "Video", "description": "What makes the endocrine organs tick? Find out in this video about the hypothalamus and pituitary glands! \u00a0By Ryan Patton.", "slug": "hypothalamus-and-pituitary-gland"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/hormone-concentration-metabolism-negative-feedback/", "id": "RycF0ub2Al0", "title": "Hormone concentration metabolism and negative feedback", "kind": "Video", "description": "In this video we're going to learn about how the concentration of hormones in our blood is regulated. By Ryan Patton.", "slug": "hormone-concentration-metabolism-negative-feedback"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/types-of-hormones/", "id": "KSclrkk_Ako", "title": "Types of hormones", "kind": "Video", "description": "There are three major types of hormones, based on structure, in our body. Lets find out a little more about them. By Ryan Patton.", "slug": "types-of-hormones"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/cellular-mechanism-hormone-action/", "id": "TNGSzt2v4xY", "title": "Cellular mechanism of hormone action", "kind": "Video", "description": "Learn about the interaction between chemical messages and their target cells in this video about hormone action. By Ryan Patton.", "slug": "cellular-mechanism-hormone-action"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/terpenes-to-steroids1/", "id": "ywfxY9UDRo4", "title": "From terpenes to steroids part 1: Terpenes", "kind": "Video", "description": "Steroids have to come from somewhere, right? Let's learn about the carbon building blocks with which steroids are made. By Ryan Patton.", "slug": "terpenes-to-steroids1"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/terpenes-to-steroid2/", "id": "-1KeL9wVfOY", "title": "From terpenes to steroids part 2: Squalene, cholesterol, and steroids", "kind": "Video", "slug": "terpenes-to-steroid2"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-the-endocrine-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system", "extended_slug": "test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system", "kind": "Topic", "slug": "rn-the-endocrine-system"}], "in_knowledge_map": false, "description": "When you\u2019re nervous before an important speech, or asking someone out on a date, you might feel butterflies in your stomach. This is actually the result of your endocrine system releasing hormones! You can\u2019t really point to any single organ as \u201cthe endocrine system\u201d, because it\u2019s actually a family of glands that secrete hormones into the body. Hormones seep into the blood (imagine putting a tea bag into hot water), and as the blood flows around the body, it carries with it these important hormone molecules that interact with specific target cells and organs. This signaling system helps to keep the entire body well-balanced and on the same page.", "node_slug": "rn-endocrine-system", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-endocrine-system", "extended_slug": "test-prep/nclex-rn/rn-endocrine-system", "kind": "Topic", "slug": "rn-endocrine-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/", "id": "rn-endocrine-system-diseases", "hide": false, "title": "Endocrine system diseases", "child_data": [{"kind": "Topic", "id": "x778a0ec4"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/", "id": "rn-diabetes", "hide": false, "title": "Diabetes", "child_data": [{"kind": "Article", "id": "xa0d71884"}, {"kind": "Video", "id": "x35df36cb"}, {"kind": "Video", "id": "x38e3fb6b"}, {"kind": "Video", "id": "xdea85e83"}, {"kind": "Video", "id": "x902f4eb6"}, {"kind": "Video", "id": "xb81fa1e3"}, {"kind": "Video", "id": "x5d757900"}, {"kind": "Video", "id": "x073cc344"}, {"kind": "Video", "id": "x0926aef3"}, {"kind": "Video", "id": "x428415f6"}, {"kind": "Video", "id": "xa97d83af"}, {"kind": "Video", "id": "xbb889919"}, {"kind": "Video", "id": "xd2e6c5c3"}, {"kind": "Video", "id": "xf7677f8c"}, {"kind": "Video", "id": "x2230b549"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/what-is-diabetes-mellitus/", "id": "ulxyWZf7BWc", "title": "What is diabetes mellitus?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-diabetes-mellitus"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/breaking-down-diabetes/", "id": "dpBA1lH39L8", "title": "Breaking down diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "breaking-down-diabetes"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/types-of-diabetes/", "id": "c9LwwQK5588", "title": "Types of diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "types-of-diabetes"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/pathophysiology-type-i-diabetes/", "id": "3B73j1tKkpI", "title": "Pathophysiology - Type I diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pathophysiology-type-i-diabetes"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/pathophysiology-type-ii-diabetes/", "id": "RlLrvnnTDDU", "title": "Pathophysiology - Type II diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pathophysiology-type-ii-diabetes"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/diagnosing-diabetes/", "id": "iUlYRyvQAIE", "title": "Diagnosing diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-diabetes"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/treating-type-i-diabetes/", "id": "ImZO2ytl9P4", "title": "Treating type I diabetes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treating-type-i-diabetes"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/treating-type-ii-diabetes-pharmacology/", "id": "IMLVbEzM0DI", "title": "Treating type II diabetes - Pharmacology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treating-type-ii-diabetes-pharmacology"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/treating-type-ii-diabetes-a-practical-approach/", "id": "hFZPl_t2GLU", "title": "Treating type II diabetes - A practical approach", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treating-type-ii-diabetes-a-practical-approach"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/acute-complications-of-diabetes-diabetic-ketoacidosis/", "id": "tpjVmLIUWCo", "title": "Acute complications of diabetes - Diabetic ketoacidosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "acute-complications-of-diabetes-diabetic-ketoacidosis"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/acute-complications-of-diabetes-hyperosmolar-hyperglycemic-nonketotic-state/", "id": "iKKF5yuxvg8", "title": "Acute complications of diabetes - Hyperosmolar hyperglycemic nonketotic state", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "acute-complications-of-diabetes-hyperosmolar-hyperglycemic-nonketotic-state"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/diabetic-nephropathy-mechanisms/", "id": "F4Lt0AjMxEY", "title": "Diabetic nephropathy - Mechanisms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diabetic-nephropathy-mechanisms"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/diabetic-nephropathy-clinical-presentation-treatment/", "id": "Pr_-cUA_PY8", "title": "Diabetic nephropathy - Clinical presentation & treatment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diabetic-nephropathy-clinical-presentation-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes/diabetic-retinopathy/", "id": "VIrkurR446s", "title": "Diabetic retinopathy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diabetic-retinopathy"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-diabetes", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes", "extended_slug": "test-prep/nclex-rn/rn-endocrine-system-diseases/rn-diabetes", "kind": "Topic", "slug": "rn-diabetes"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-endocrine-system-diseases", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-endocrine-system-diseases", "extended_slug": "test-prep/nclex-rn/rn-endocrine-system-diseases", "kind": "Topic", "slug": "rn-endocrine-system-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-lymphatic-system/", "id": "rn-lymphatic-system", "hide": false, "title": "Lymphatic system physiology", "child_data": [{"kind": "Topic", "id": "x5f1f1b31"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system/", "id": "rn-the-lymphatic-system", "hide": false, "title": "Lymphatic system", "child_data": [{"kind": "Video", "id": "xd0841695"}, {"kind": "Video", "id": "xb6494b98"}, {"kind": "Video", "id": "x6b3d6ec8"}, {"kind": "Video", "id": "xefd7202b"}, {"kind": "Video", "id": "xcefa425b"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system/why-do-we-need-a-lymphatic-system/", "id": "_GinTV94hUk", "title": "Why we need a lymphatic system", "kind": "Video", "description": "Welcome to the lymphatic system! Find out why we need it, and how it interacts with our blood vessels. By Patrick van Nieuwenhuizen.", "slug": "why-do-we-need-a-lymphatic-system"}, {"path": "khan/test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system/lymphatic-vessels-move-fluid/", "id": "CLneY6SoPi0", "title": "How lymphatic vessels move fluid", "kind": "Video", "description": "Find out how the body's mysterious second circulatory system works. Learn how it can move fluid even when it has no heart of its own. By Patrick van Nieuwenhuizen.", "slug": "lymphatic-vessels-move-fluid"}, {"path": "khan/test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system/lymphatic-system-immunity/", "id": "kjLwVqxwaIM", "title": "The lymphatic system's role in immunity", "kind": "Video", "description": "Learn about how B and T cells reside in lymph nodes. Find out how that enables them to get a preview of what they need to be prepared to fight. By Patrick van Nieuwenhuizen.", "slug": "lymphatic-system-immunity"}, {"path": "khan/test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system/lipid-and-protein-transport-lymphatic-system/", "id": "EHUlWm0kFTA", "title": "Lipid and protein transport in the lymphatic system", "kind": "Video", "description": "Learn about a third function of the lymphatic system. See how it finds a sneaky way to get fats and proteins into your bloodstream. By Patrick van Nieuwenhuizen.", "slug": "lipid-and-protein-transport-lymphatic-system"}, {"path": "khan/test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system/what-is-lymph/", "id": "2Bq2xopLew8", "title": "What is actually in lymph", "kind": "Video", "description": "Learn about the differences between lymph and blood. Find out what is actually in lymph, and how it might be different across your body. By Patrick van Nieuwenhuizen.", "slug": "what-is-lymph"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-the-lymphatic-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system", "extended_slug": "test-prep/nclex-rn/rn-lymphatic-system/rn-the-lymphatic-system", "kind": "Topic", "slug": "rn-the-lymphatic-system"}], "in_knowledge_map": false, "description": "Your heart pumps roughly 20 L of blood throughout the day to your tissues. The plasma component of blood (not containing blood cells) leaks out through capillaries (the tiniest of blood vessels) and is mostly reabsorbed. However, about 3L of the plasma is left behind in fluid surrounding tissues, and it is the job of the hard-working lymphatic system to bring back this fluid to the circulatory system. The lymphatic system moves fluid in one direction, but without the force of a pump like the heart.", "node_slug": "rn-lymphatic-system", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-lymphatic-system", "extended_slug": "test-prep/nclex-rn/rn-lymphatic-system", "kind": "Topic", "slug": "rn-lymphatic-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-immune-system/", "id": "rn-immune-system", "hide": false, "title": "Immune system physiology", "child_data": [{"kind": "Topic", "id": "xe9b98776"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/", "id": "rn-the-immune-system", "hide": false, "title": "Immune system", "child_data": [{"kind": "Video", "id": "24012"}, {"kind": "Video", "id": "24014"}, {"kind": "Video", "id": "24016"}, {"kind": "Video", "id": "24018"}, {"kind": "Video", "id": "24020"}, {"kind": "Video", "id": "24022"}, {"kind": "Video", "id": "24024"}, {"kind": "Video", "id": "xa3c5171b"}, {"kind": "Video", "id": "x71bee542"}, {"kind": "Video", "id": "xe563beb3"}, {"kind": "Video", "id": "xcf8c6f8f"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/role-of-phagocytes-in-innate-or-nonspecific-immunity/", "id": "O1N2rENXq_Y", "title": "Role of phagocytes in innate or nonspecific immunity", "kind": "Video", "description": "Role of phagocytes in innate or nonspecific immunity. Neutrophils, macrophages, and dendritic cells. MHC II.", "slug": "role-of-phagocytes-in-innate-or-nonspecific-immunity"}, {"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated/", "id": "rp7T4IItbtM", "title": "Types of immune responses: Innate and adaptive. humoral vs. cell-mediated", "kind": "Video", "description": "Overview of types of immune responses. Difference between innate and adaptive immunity. Differences between humoral adaptive immunity and cell-mediated adaptive immunity.", "slug": "types-of-immune-responses-innate-and-adaptive-humoral-vs-cell-mediated"}, {"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/b-lymphocytes-b-cells/", "id": "Z36dUduOk1Y", "title": "B lymphocytes (B cells)", "kind": "Video", "description": "Overview of B cells (B lymphocytes) and how they are activated and produce antibodies", "slug": "b-lymphocytes-b-cells"}, {"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/professional-antigen-presenting-cells-apc-and-mhc-ii-complexes/", "id": "j_kSmmEpvQk", "title": "Professional antigen presenting cells (APC) and MHC II complexes", "kind": "Video", "description": "How professional antigen presenting cells present parts of engulfed pathogens on MHC II complexes (major histocompatibility complexes).", "slug": "professional-antigen-presenting-cells-apc-and-mhc-ii-complexes"}, {"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/helper-t-cells/", "id": "uwMYpTYsNZM", "title": "Helper T cells", "kind": "Video", "description": "Introduction to helper T cells and their role in activating B cells", "slug": "helper-t-cells"}, {"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/cytotoxic-t-cells/", "id": "oqI4skjr6lQ", "title": "Cytotoxic T cells", "kind": "Video", "description": "How cytotoxic T cells get activated by MHC-I/antigen complexes and then proceed to kill infected cells", "slug": "cytotoxic-t-cells"}, {"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/review-of-b-cells-cd4-t-cells-and-cd8-t-cells/", "id": "xaz5ftvZCyI", "title": "Review of B cells, CD4+ T cells and CD8+ T cells", "kind": "Video", "description": "Review of B cells, CD4+ T cells and CD8+ T cells", "slug": "review-of-b-cells-cd4-t-cells-and-cd8-t-cells"}, {"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/clonal-selection/", "id": "EsQyCHs4IBY", "title": "Clonal selection", "kind": "Video", "slug": "clonal-selection"}, {"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/self-versus-non-self/", "id": "afM6_VFaIss", "title": "Self vs. non-self immunity", "kind": "Video", "slug": "self-versus-non-self"}, {"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/how-white-blood-cells-move-around/", "id": "LXFQG4Ugreo", "title": "How white blood cells move around", "kind": "Video", "slug": "how-white-blood-cells-move-around"}, {"path": "khan/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system/rn-blood-cell-lineages/", "id": "97nFwkRiNCc", "title": "Blood cell lineages", "kind": "Video", "slug": "rn-blood-cell-lineages"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-the-immune-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-immune-system/rn-the-immune-system", "extended_slug": "test-prep/nclex-rn/rn-immune-system/rn-the-immune-system", "kind": "Topic", "slug": "rn-the-immune-system"}], "in_knowledge_map": false, "description": "Chances are, you\u2019ve had a fever or a cough at least once in your life (unless you live in a bubble, in which case you should probably go out more!) Have you ever wondered why your body reacts this way? Your body has a deadly arsenal of weapons against microbial invaders, ranging from bacteria and viruses to protozoans and fungi. We have specialized cells that destroy foreign bodies through mechanisms such as consumption, expulsion, and degradation. You will become acquainted with the interplay of the numerous soldiers in your body\u2019s army and how they keep you healthy!", "node_slug": "rn-immune-system", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-immune-system", "extended_slug": "test-prep/nclex-rn/rn-immune-system", "kind": "Topic", "slug": "rn-immune-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-renal-system/", "id": "rn-renal-system", "hide": false, "title": "Renal system physiology", "child_data": [{"kind": "Topic", "id": "xeb651f76"}, {"kind": "Topic", "id": "x6310d284"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/", "id": "rn-the-renal-system", "hide": false, "title": "Renal system introduction", "child_data": [{"kind": "Video", "id": "xa816dcfa"}, {"kind": "Video", "id": "xebe4fd0a"}, {"kind": "Video", "id": "xbf40106d"}, {"kind": "Video", "id": "xcba65aa4"}, {"kind": "Video", "id": "xbdffddb5"}, {"kind": "Video", "id": "x7815c894"}, {"kind": "Video", "id": "24028"}, {"kind": "Video", "id": "24030"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/meet-the-kidneys/", "id": "mcQQGGShmLs", "title": "Meet the kidneys!", "kind": "Video", "slug": "meet-the-kidneys"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/how-do-our-kidneys-work/", "id": "ctGkLYuUCvU", "title": "Kidney function and anatomy", "kind": "Video", "slug": "how-do-our-kidneys-work"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/glomerular-filtration-in-the-nephron/", "id": "wWsdcfGta4k", "title": "Glomerular filtration in the nephron", "kind": "Video", "slug": "glomerular-filtration-in-the-nephron"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/changing-glomerular-filtration-rate/", "id": "x0pFo1RxTzM", "title": "Changing glomerular filtration rate", "kind": "Video", "slug": "changing-glomerular-filtration-rate"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/countercurrent-multiplication-in-the-kidney/", "id": "Vqce2dtg45U", "title": "Countercurrent multiplication in the kidney", "kind": "Video", "slug": "countercurrent-multiplication-in-the-kidney"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/urination/", "id": "rheO1tVyB0U", "title": "Urination", "kind": "Video", "slug": "urination"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/the-kidney-and-nephron/", "id": "cc8sUv2SuaY", "title": "The kidney and nephron", "kind": "Video", "description": "Overview of how the nephrons in the kidney filter blood and reabsorb water and other molecules.", "slug": "the-kidney-and-nephron"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system/secondary-active-transport-in-the-nephron/", "id": "czY5nyvZ7cU", "title": "Secondary active transport in the nephron", "kind": "Video", "description": "Secondary Active Transport in the Nephron", "slug": "secondary-active-transport-in-the-nephron"}], "in_knowledge_map": false, "description": "3B: If you want to learn more about the renal system, then urine the right place! (Pun aside, the kidneys are about more than just making urine). Every thirty minutes, your kidneys filter the entire blood supply in your body. Imagine a dirty pool filled with algae. Placing a filter in this pool will cause the algae to be flushed out, and after a time you\u2019ll have a clean, crisp blue pool to enjoy. Just like the filter for a pool, our kidneys filter the blood and remove toxic wastes. These paired organs are key to maintaining electrolyte and water homeostasis in your body.", "node_slug": "rn-the-renal-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-renal-system/rn-the-renal-system", "extended_slug": "test-prep/nclex-rn/rn-renal-system/rn-the-renal-system", "kind": "Topic", "slug": "rn-the-renal-system"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/", "id": "rn-renal-regulation-of-blood", "hide": false, "title": "Renal regulation of blood pressure", "child_data": [{"kind": "Video", "id": "1047183569"}, {"kind": "Video", "id": "1047335429"}, {"kind": "Video", "id": "1047465049"}, {"kind": "Video", "id": "1047330622"}, {"kind": "Video", "id": "1047114997"}, {"kind": "Video", "id": "1047406243"}, {"kind": "Video", "id": "1047456036"}, {"kind": "Video", "id": "1047327652"}, {"kind": "Video", "id": "1058371798"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/general-overview-of-the-raas-system-cells-and-hormones/", "id": "BVUeCLt68Ik", "title": "General overview of the RAAS system: Cells and hormones", "kind": "Video", "description": "Learn the important cells and hormones that are working together to control your blood pressure! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "general-overview-of-the-raas-system-cells-and-hormones"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/renin-production-in-the-kidneys/", "id": "AtlhAhONHyM", "title": "Renin production in the kidneys", "kind": "Video", "description": "Learn the three major triggers for Renin production by the Juxtaglomerular cells. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "renin-production-in-the-kidneys"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/activating-angiotensin-2/", "id": "cUVS0AlRyw8", "title": "Activating angiotensin 2", "kind": "Video", "description": "See how Renin and ACE work to cut Angiotensinogen down to size! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "activating-angiotensin-2"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/angiotensin-2-raises-blood-pressure/", "id": "Oges5YqDLHY", "title": "Angiotensin 2 raises blood pressure", "kind": "Video", "description": "See how Angiotensin 2 effects 4 target \"organs\" to increase blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "angiotensin-2-raises-blood-pressure"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/aldosterone-raises-blood-pressure-and-lowers-potassium/", "id": "64_ZfIemRGM", "title": "Aldosterone raises blood pressure and lowers potassium", "kind": "Video", "description": "See how Aldosterone effects the principal cells of the kidney to raise BP and lower potassium. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-raises-blood-pressure-and-lowers-potassium"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/aldosterone-removes-acid-from-the-blood/", "id": "7HTy-6NLWGM", "title": "Aldosterone removes acid from the blood", "kind": "Video", "description": "See how Aldosterone acts on the alpha-intercalated cell to remove protons (acid) from the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-removes-acid-from-the-blood"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/adh-secretion/", "id": "8dQdfbE8kFU", "title": "ADH secretion", "kind": "Video", "description": "Learn the key triggers for ADH secretion. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adh-secretion"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/adh-effects-on-blood-pressure/", "id": "Ot1We4_EfRE", "title": "ADH effects on blood pressure", "kind": "Video", "description": "See how ADH acts on blood vessels and the kidney to raise blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "adh-effects-on-blood-pressure"}, {"path": "khan/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/aldosterone-and-adh/", "id": "Z0XPMFL45oo", "title": "Aldosterone and ADH", "kind": "Video", "description": "Find out how Aldosterone and ADH cause changes in volume and osmolarity. Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "aldosterone-and-adh"}], "in_knowledge_map": false, "description": "In addition to fluid and electrolyte balance, the kidneys play an essential role in regulating blood pressure. When the nephron, the functional unit of the kidney, senses that it is not receiving much blood flow, it knows something is up. So begins a cascade which allows the nephron to reabsorb more fluid from the urine, in attempt to fill up the perceived dip in blood volume. Here you will learn the mechanism of ADH and the renin-angiotensin-aldosterone system in sustaining this homeostasis.", "node_slug": "rn-renal-regulation-of-blood", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood", "extended_slug": "test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood", "kind": "Topic", "slug": "rn-renal-regulation-of-blood"}], "in_knowledge_map": false, "description": "If you want to learn more about the renal system, then urine the right place! (Pun aside, the kidneys are about more than just making urine). Every thirty minutes, your kidneys filter the entire blood supply in your body. Imagine a dirty pool filled with algae. Placing a filter in this pool will cause the algae to be flushed out, and after a time you\u2019ll have a clean, crisp blue pool to enjoy. Just like the filter for a pool, our kidneys filter the blood and remove toxic wastes. These paired organs are key to maintaining electrolyte and water homeostasis in your body.", "node_slug": "rn-renal-system", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-renal-system", "extended_slug": "test-prep/nclex-rn/rn-renal-system", "kind": "Topic", "slug": "rn-renal-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/", "id": "rn-gastrointestinal-system", "hide": false, "title": "Gastrointestinal system physiology", "child_data": [{"kind": "Topic", "id": "x53969ce0"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/", "id": "rn-the-gastrointestinal-system", "hide": false, "title": "Gastrointestinal system", "child_data": [{"kind": "Video", "id": "x9884099f"}, {"kind": "Video", "id": "x6ec16651"}, {"kind": "Video", "id": "x2aae6128"}, {"kind": "Video", "id": "xbb2d8ab9"}, {"kind": "Video", "id": "x854eb5a2"}, {"kind": "Video", "id": "x0370d7c8"}, {"kind": "Video", "id": "x2192aa78"}, {"kind": "Video", "id": "xafe158bf"}, {"kind": "Video", "id": "xb50aa618"}, {"kind": "Video", "id": "xd8f3feca"}, {"kind": "Video", "id": "x890d5926"}, {"kind": "Video", "id": "x947fab36"}, {"kind": "Video", "id": "x595c4214"}, {"kind": "Video", "id": "xa85063cd"}, {"kind": "Video", "id": "x64e79811"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/meet-the-gastrointestinal-tract/", "id": "Oh_Pt_UrtEE", "title": "Meet the gastrointestinal tract!", "kind": "Video", "slug": "meet-the-gastrointestinal-tract"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/mouth/", "id": "KyEk35-Uwh0", "title": "Mouth", "kind": "Video", "slug": "mouth"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/teeth/", "id": "9wYbsSrDwbA", "title": "Teeth", "kind": "Video", "slug": "teeth"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/esophagus/", "id": "wU9_daCwr_w", "title": "Esophagus", "kind": "Video", "slug": "esophagus"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/stomach/", "id": "OzLoUCCASwM", "title": "Stomach", "kind": "Video", "slug": "stomach"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/small-intestine-part-1/", "id": "UgnF1w-H8vw", "title": "Small intestine 1: Structure", "kind": "Video", "slug": "small-intestine-part-1"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/small-intestine-part-2-digestion/", "id": "nLCNoT79_-o", "title": "Small intestine 2: Digestion", "kind": "Video", "slug": "small-intestine-part-2-digestion"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/small-intestine-part-3-absorption/", "id": "7zq3s3F5Do8", "title": "Small intestine 3: Absorption", "kind": "Video", "slug": "small-intestine-part-3-absorption"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/liver/", "id": "rDjWrNRKfvg", "title": "Liver", "kind": "Video", "slug": "liver"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/hepatic-lobule/", "id": "nJfB32MtqBA", "title": "Hepatic lobule", "kind": "Video", "slug": "hepatic-lobule"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/biliary-tree/", "id": "jmfcACEGW-0", "title": "Biliary tree", "kind": "Video", "slug": "biliary-tree"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/exocrine-pancreas/", "id": "BtqlMr1rUT8", "title": "Exocrine pancreas", "kind": "Video", "slug": "exocrine-pancreas"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/endocrine-pancreas/", "id": "xNf--q0YMq8", "title": "Endocrine pancreas", "kind": "Video", "slug": "endocrine-pancreas"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/colon-rectum-anus/", "id": "Lzr9GGjh6YQ", "title": "Colon, rectum, and anus", "kind": "Video", "slug": "colon-rectum-anus"}, {"path": "khan/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system/control-of-the-gi-tract/", "id": "_kfB2qKjdgM", "title": "Control of the GI tract", "kind": "Video", "slug": "control-of-the-gi-tract"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-the-gastrointestinal-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system", "extended_slug": "test-prep/nclex-rn/rn-gastrointestinal-system/rn-the-gastrointestinal-system", "kind": "Topic", "slug": "rn-the-gastrointestinal-system"}], "in_knowledge_map": false, "description": "Do you live to eat, or eat to live? Folks fall on both sides of this question, but who can deny the powerful role that food and water play in our everyday lives. If we were cars, food and water would be the gasoline. Eating keeps us moving, laughing, playing, and learning. The energy from food is carefully extracted through a process of ingestion, digestion, and absorption, and requires one long (very long!) tube with a couple of key organs (liver, pancreas) sprouting off of it. Go ahead and grab a bite to eat before we get started\u2026", "node_slug": "rn-gastrointestinal-system", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-gastrointestinal-system", "extended_slug": "test-prep/nclex-rn/rn-gastrointestinal-system", "kind": "Topic", "slug": "rn-gastrointestinal-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/", "id": "gastrointestinal-diseases", "hide": false, "title": "Gastrointestinal system diseases", "child_data": [{"kind": "Topic", "id": "x588e315a"}, {"kind": "Topic", "id": "x38c778b7"}, {"kind": "Topic", "id": "x6a47bd89"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/", "id": "gastroenteritis-rn", "hide": false, "title": "Gastroenteritis", "child_data": [{"kind": "Article", "id": "x01190d77"}, {"kind": "Video", "id": "xc1be470d"}, {"kind": "Video", "id": "x98f9880a"}, {"kind": "Video", "id": "x7a28537c"}, {"kind": "Video", "id": "x5e88475d"}, {"kind": "Video", "id": "x86390a13"}, {"kind": "Video", "id": "x20e01dd7"}, {"kind": "Video", "id": "xc63bcf0b"}, {"kind": "Video", "id": "x3b5bab57"}], "children": [{"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-gastroenteritis/", "id": "pIDmePznLBo", "title": "What is gastroenteritis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-gastroenteritis"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-viral-gastroenteritis/", "id": "2Xq2fZCs2oU", "title": "What is viral gastroenteritis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-viral-gastroenteritis"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-staphylococcal-enteritis/", "id": "9bfDEsz7eSM", "title": "What is staphylococcal enteritis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-staphylococcal-enteritis"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-cholera/", "id": "kXf8MkpALrc", "title": "What is cholera?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-cholera"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-campylobacteriosis/", "id": "HsyrOicubso", "title": "What is campylobacteriosis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-campylobacteriosis"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-shigellosis/", "id": "Ny0b9xO2sgY", "title": "What is shigellosis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-shigellosis"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-salmonella-poisoning/", "id": "3UAJS9jzyV4", "title": "What is salmonella poisoning?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-salmonella-poisoning"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn/what-is-travelers-diarrhea/", "id": "rTKdqvOZcQ4", "title": "What is traveler's diarrhea?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-travelers-diarrhea"}], "in_knowledge_map": false, "description": "", "node_slug": "gastroenteritis-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn", "extended_slug": "test-prep/nclex-rn/gastrointestinal-diseases/gastroenteritis-rn", "kind": "Topic", "slug": "gastroenteritis-rn"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/inflammatory-bowel-disease-rn/", "id": "inflammatory-bowel-disease-rn", "hide": false, "title": "Inflammatory bowel disease", "child_data": [{"kind": "Article", "id": "xdcc98e90"}, {"kind": "Video", "id": "xd3bea895"}, {"kind": "Video", "id": "xe10e889c"}, {"kind": "Video", "id": "x3e477ee8"}, {"kind": "Video", "id": "x77832db1"}], "children": [{"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/inflammatory-bowel-disease-rn/inflammatory-bowel-disease-vs-irritable-bowel-disease/", "id": "FaKB7Y2gL9Y", "title": "Inflammatory bowel disease vs irritable bowel disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "inflammatory-bowel-disease-vs-irritable-bowel-disease"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/inflammatory-bowel-disease-rn/inflammatory-bowel-disease-epidemiology-pathology/", "id": "Ueqs7pl5OAY", "title": "Inflammatory bowel disease: Epidemiology & pathology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "inflammatory-bowel-disease-epidemiology-pathology"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/inflammatory-bowel-disease-rn/inflammatory-bowel-disease-diagnosis/", "id": "QH1g-pVS0ZY", "title": "Inflammatory bowel disease: Diagnosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "inflammatory-bowel-disease-diagnosis"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/inflammatory-bowel-disease-rn/inflammatory-bowel-disease-treatment/", "id": "a67MCzUjUXA", "title": "Inflammatory bowel disease: Treatment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "inflammatory-bowel-disease-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "inflammatory-bowel-disease-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/gastrointestinal-diseases/inflammatory-bowel-disease-rn", "extended_slug": "test-prep/nclex-rn/gastrointestinal-diseases/inflammatory-bowel-disease-rn", "kind": "Topic", "slug": "inflammatory-bowel-disease-rn"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/celiac-disease-rn/", "id": "celiac-disease-rn", "hide": false, "title": "Celiac disease", "child_data": [{"kind": "Article", "id": "xd584d0b2"}, {"kind": "Video", "id": "x2e00069c"}, {"kind": "Video", "id": "x5521b979"}], "children": [{"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/celiac-disease-rn/what-is-gluten/", "id": "25mxf_xUqDQ", "title": "What is gluten?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-gluten"}, {"path": "khan/test-prep/nclex-rn/gastrointestinal-diseases/celiac-disease-rn/what-is-celiac-disease/", "id": "gZeliSjhkpg", "title": "What is celiac disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-celiac-disease"}], "in_knowledge_map": false, "description": "", "node_slug": "celiac-disease-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/gastrointestinal-diseases/celiac-disease-rn", "extended_slug": "test-prep/nclex-rn/gastrointestinal-diseases/celiac-disease-rn", "kind": "Topic", "slug": "celiac-disease-rn"}], "in_knowledge_map": false, "description": "", "node_slug": "gastrointestinal-diseases", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/gastrointestinal-diseases", "extended_slug": "test-prep/nclex-rn/gastrointestinal-diseases", "kind": "Topic", "slug": "gastrointestinal-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-muscular-system/", "id": "rn-muscular-system", "hide": false, "title": "Muscular-skeletal system physiology", "child_data": [{"kind": "Topic", "id": "xd7c9699f"}, {"kind": "Topic", "id": "xe16ef4a8"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/", "id": "rn-the-muscular-system", "hide": false, "title": "Muscular system", "child_data": [{"kind": "Video", "id": "24004"}, {"kind": "Video", "id": "24006"}, {"kind": "Video", "id": "24008"}, {"kind": "Video", "id": "xc5597198"}, {"kind": "Video", "id": "1097595603"}, {"kind": "Video", "id": "xe87d0c16"}, {"kind": "Video", "id": "x71e0e24c"}, {"kind": "Video", "id": "xbb0cbe62"}, {"kind": "Video", "id": "1101443158"}, {"kind": "Video", "id": "x2ef4988a"}, {"kind": "Video", "id": "x794c36ac"}, {"kind": "Video", "id": "x7926b1ce"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/myosin-and-actin/", "id": "zopoN2i7ALQ", "title": "Myosin and actin", "kind": "Video", "description": "How myosin and actin interact to produce mechanical force.", "slug": "myosin-and-actin"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction/", "id": "LiOfeSsjrB8", "title": "Tropomyosin and troponin and their role in regulating muscle contraction", "kind": "Video", "description": "Tropomyosin and troponin and their role in regulating muscle contraction. How calcium ion concentration dictates whether a muscle is contracting or not.", "slug": "tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/role-of-the-sarcoplasmic-reticulum-in-muscle-cells/", "id": "SauhB2fYQkM", "title": "Role of the sarcoplasmic reticulum in muscle cells", "kind": "Video", "description": "The role of the sarcoplasmic reticulum in controlling calcium ion concentrations within the muscle cell.", "slug": "role-of-the-sarcoplasmic-reticulum-in-muscle-cells"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/anatomy-of-a-muscle-cell-1/", "id": "L-_MvjcH0xk", "title": "Anatomy of a muscle cell", "kind": "Video", "description": "Understanding the structure of a muscle cell. By Raja Narayan.", "slug": "anatomy-of-a-muscle-cell-1"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/three-types-of-muscle/", "id": "bwOE1MEginA", "title": "Three types of muscle", "kind": "Video", "description": "Understanding the structure of a muscle cell.", "slug": "three-types-of-muscle"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/motor-neurons/", "id": "LwA00uqniiU", "title": "Motor neurons", "kind": "Video", "description": "How do neurons help us move? Learn about how motor neurons send signals to muscle cells and what happens when we damage this precious neurons. By Raja Narayan.", "slug": "motor-neurons"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/neuromuscular-junction/", "id": "lRJd56BCidg", "title": "Neuromuscular junction, motor end-plate", "kind": "Video", "description": "How do neurons talk directly to muscle cells? Learn about how a neuronal message is translated into a muscular action at the neuromuscular junction. By Raja Narayan.", "slug": "neuromuscular-junction"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/type-1-and-2-muscle-fibers/", "id": "l5yMz2lFgx0", "title": "Type 1 and type 2 muscle fibers", "kind": "Video", "description": "What's the difference between type 1 and type 2 muscle fibers? Learn one golden rule that will help you easily distinguish between them. By Raja Narayan.", "slug": "type-1-and-2-muscle-fibers"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/calcium-puts-myosin-to-work/", "id": "vv6WBeqw2Nc", "title": "Calcium puts myosin to work", "kind": "Video", "description": "See exactly how Calcium binds Troponin-C and allows Myosin to do some work.", "slug": "calcium-puts-myosin-to-work"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/muscle-innervation/", "id": "NqasGo5q5yQ", "title": "Muscle innervation", "kind": "Video", "description": "Which muscles do we voluntarily control? Which muscles do we have NO control over? What's the difference between sympathetic and parasympathetic innervation? Learn about how our brain splits its control over the body into autonomic and somatic nervous systems.\u00a0 By Raja Narayan.", "slug": "muscle-innervation"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/autonomic-somatic-nervous-system/", "id": "ye28W_OygOw", "title": "Autonomic vs somatic nervous system", "kind": "Video", "description": "Understand the different divisions of the brain that control our muscles.\u00a0 By Raja Narayan.", "slug": "autonomic-somatic-nervous-system"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system/thermoregulation-by-muscles/", "id": "HfXqyPS5bRo", "title": "Thermoregulation by muscles", "kind": "Video", "description": "Why do we shiver when it's cold? How do our muscles make sure we don't freeze or have a heat stroke? Learn how the skin, brain, blood vessels, and muscles work together to maintain our core body temperature.\u00a0 By Raja Narayan.", "slug": "thermoregulation-by-muscles"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-the-muscular-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system", "extended_slug": "test-prep/nclex-rn/rn-muscular-system/rn-the-muscular-system", "kind": "Topic", "slug": "rn-the-muscular-system"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/", "id": "rn-the-skeletal-system", "hide": false, "title": "Skeletal system", "child_data": [{"kind": "Video", "id": "x5e2ec71a"}, {"kind": "Video", "id": "x2354d3d6"}, {"kind": "Video", "id": "xf10511b3"}, {"kind": "Video", "id": "x3b4aac33"}, {"kind": "Video", "id": "xcfe8f34b"}, {"kind": "Video", "id": "xd846e40a"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/skeletal-structure-and-function/", "id": "muiNDpURT9M", "title": "Skeletal structure and function", "kind": "Video", "slug": "skeletal-structure-and-function"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/microscopic-structure-of-bone-haversian-system/", "id": "6_PP49FuyTM", "title": "Microscopic structure of bone - the Haversian system", "kind": "Video", "slug": "microscopic-structure-of-bone-haversian-system"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/cellular-structure-of-bone/", "id": "um6_5re9XU0", "title": "Cellular structure of bone", "kind": "Video", "slug": "cellular-structure-of-bone"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/skeletal-endocrine-control/", "id": "j3oBvc3lKsY", "title": "Skeletal endocrine control", "kind": "Video", "slug": "skeletal-endocrine-control"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/cartilage/", "id": "5kpVQqV7EV8", "title": "Cartilage", "kind": "Video", "slug": "cartilage"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system/ligaments-tendons-and-joints/", "id": "nxfWL0TR5H4", "title": "Ligaments, tendons, and joints", "kind": "Video", "slug": "ligaments-tendons-and-joints"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-the-skeletal-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system", "extended_slug": "test-prep/nclex-rn/rn-muscular-system/rn-the-skeletal-system", "kind": "Topic", "slug": "rn-the-skeletal-system"}], "in_knowledge_map": false, "description": "How do our muscles work? When we decide to kick a ball or shake a leg, how do we get our bodies to do that? Which muscles do we control? Which muscles control us? Learn how our muscles work at the smallest, most cellular level. Then see how nature scales up those microscopic processes into a kick or a dance move. Finally, learn how our brain tells muscle to contract and how that helps us respond to changes in temperature or even a lion chasing us.", "node_slug": "rn-muscular-system", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-muscular-system", "extended_slug": "test-prep/nclex-rn/rn-muscular-system", "kind": "Topic", "slug": "rn-muscular-system"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/", "id": "rn-muscular-skeletal-diseases", "hide": false, "title": "Muscular-skeletal diseases", "child_data": [{"kind": "Topic", "id": "x88db159b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/", "id": "rn-arthritis", "hide": false, "title": "Arthritis and rheumatoid arthritis", "child_data": [{"kind": "Video", "id": "x61613b8e"}, {"kind": "Article", "id": "x06735807"}, {"kind": "Video", "id": "x0483a918"}, {"kind": "Video", "id": "x25735026"}, {"kind": "Video", "id": "xd41f51e5"}, {"kind": "Video", "id": "xa4221e0e"}, {"kind": "Video", "id": "x91eb757c"}, {"kind": "Video", "id": "x80f1982b"}, {"kind": "Video", "id": "xd7cfa0a8"}, {"kind": "Video", "id": "x760cdb46"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/what-is-arthritis/", "id": "3X5UEYD94-M", "title": "What is arthritis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-arthritis"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/osteoarthritis-vs-rheumatoid-arthritis-symptoms/", "id": "H-OoyU8Gb_Q", "title": "Osteoarthritis vs rheumatoid arthritis symptoms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "osteoarthritis-vs-rheumatoid-arthritis-symptoms"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/osteoarthritis-vs-rheumatoid-arthritis-pathophysiology/", "id": "VIfQh71XwMM", "title": "Osteoarthritis vs rheumatoid arthritis pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "osteoarthritis-vs-rheumatoid-arthritis-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/osteoarthritis-vs-rheumatoid-arthritis-treatments/", "id": "2xFXOEa-xCk", "title": "Osteoarthritis vs rheumatoid arthritis treatments", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "osteoarthritis-vs-rheumatoid-arthritis-treatments"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/ankylosing-spondylitis/", "id": "7Fxt6E7m7bM", "title": "Ankylosing spondylitis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "ankylosing-spondylitis"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/reiters-syndrome/", "id": "dzQwIqc6dQE", "title": "Reiter's syndrome", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "reiters-syndrome"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/infectious-arthritis/", "id": "CsrUfTljLJ8", "title": "Infectious arthritis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "infectious-arthritis"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/gout-and-pseudogout/", "id": "1O3F-b8FfDY", "title": "Gout and pseudogout", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "gout-and-pseudogout"}, {"path": "khan/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis/gout-pathophysiology/", "id": "2r95ZVqAysQ", "title": "Gout pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "gout-pathophysiology"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-arthritis", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis", "extended_slug": "test-prep/nclex-rn/rn-muscular-skeletal-diseases/rn-arthritis", "kind": "Topic", "slug": "rn-arthritis"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-muscular-skeletal-diseases", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-muscular-skeletal-diseases", "extended_slug": "test-prep/nclex-rn/rn-muscular-skeletal-diseases", "kind": "Topic", "slug": "rn-muscular-skeletal-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/nervous-system-phy/", "id": "nervous-system-phy", "hide": false, "title": "Nervous system physiology", "child_data": [{"kind": "Topic", "id": "xf0034ff1"}, {"kind": "Topic", "id": "x976e6d0b"}, {"kind": "Topic", "id": "x50bdb0c3"}, {"kind": "Topic", "id": "xac59b7be"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells/", "id": "rn-neural-cells", "hide": false, "title": "Neural cells", "child_data": [{"kind": "Video", "id": "x34e8d04e"}, {"kind": "Video", "id": "x7a518014"}, {"kind": "Video", "id": "x8c4fa549"}, {"kind": "Video", "id": "x5fc44899"}, {"kind": "Video", "id": "x57d1f66b"}, {"kind": "Video", "id": "x0d5e3691"}, {"kind": "Video", "id": "xbe97865f"}], "children": [{"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells/overview-of-neuron-structure/", "id": "1h4kW8RX-6k", "title": "Overview of neuron structure", "kind": "Video", "description": "This video introduces the structure and structural types of neurons.\u00a0 By Matt Jensen.", "slug": "overview-of-neuron-structure"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells/overview-of-neuron-function/", "id": "BY8DJeX_tGc", "title": "Overview of neuron function", "kind": "Video", "description": "This video introduces the function and functional types of neurons.\u00a0 By Matt Jensen.", "slug": "overview-of-neuron-function"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells/astrocytes/", "id": "rfepM3L7Pqc", "title": "Astrocytes", "kind": "Video", "description": "This video describes the structure and function of astrocytes. By Matt Jensen.", "slug": "astrocytes"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells/microglia/", "id": "mw-rwhpAQe4", "title": "Microglia", "kind": "Video", "description": "This video describes the structure and function of microglia.\u00a0 By Matt Jensen.", "slug": "microglia"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells/ependymal-cells/", "id": "PpvexFbd8e8", "title": "Ependymal cells", "kind": "Video", "description": "This video describes the structure and function of ependymal cells.\u00a0 By Matt Jensen.", "slug": "ependymal-cells"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells/oligodendrocytes/", "id": "jMXf2lgddOg", "title": "Oligodendrocytes", "kind": "Video", "description": "This video describes the structure and function of oligodendrocytes.\u00a0 By Matt Jensen.", "slug": "oligodendrocytes"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells/schwann-cells/", "id": "XmL7RHouyUo", "title": "Schwann cells", "kind": "Video", "description": "This video describes the structure and function of Schwann cells.\u00a0 By Matt Jensen.", "slug": "schwann-cells"}], "in_knowledge_map": false, "description": "3A: Neurons transmit information to one another through electrochemical signals. They make up the motor nerves that allow you to type an essay, the sensory nerves that let you feel a fluffy dog, and your brain, allowing to remember the content of this module. They have a number of helper cells, ranging from astrocytes, to microglia, to ependymal cells as well. You will come to appreciate the structure and function of neurons and the comrade cells which help to maintain the optimal function of the nervous system.", "node_slug": "rn-neural-cells", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nervous-system-phy/rn-neural-cells", "extended_slug": "test-prep/nclex-rn/nervous-system-phy/rn-neural-cells", "kind": "Topic", "slug": "rn-neural-cells"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/", "id": "rn-neuron-membrane-potentials", "hide": false, "title": "Neuron membrane potentials", "child_data": [{"kind": "Video", "id": "x1066c8b0"}, {"kind": "Video", "id": "x4bfcc978"}, {"kind": "Video", "id": "x5358cfa6"}, {"kind": "Video", "id": "x8404c066"}, {"kind": "Video", "id": "xf5a47394"}, {"kind": "Video", "id": "x62bebb4e"}, {"kind": "Video", "id": "x810b045c"}, {"kind": "Video", "id": "x2db717e3"}], "children": [{"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/neuron-resting-potential-description/", "id": "4htSVI5E9AQ", "title": "Neuron resting potential description", "kind": "Video", "slug": "neuron-resting-potential-description"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/neuron-resting-potential-mechanism/", "id": "l3ngsl7FhTc", "title": "Neuron resting potential mechanism", "kind": "Video", "slug": "neuron-resting-potential-mechanism"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/neuron-graded-potential-description/", "id": "AQr0rNyUnFM", "title": "Neuron graded potential description", "kind": "Video", "slug": "neuron-graded-potential-description"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/neuron-graded-potential-mechanism/", "id": "NaAwVrOEyss", "title": "Neuron graded potential mechanism", "kind": "Video", "slug": "neuron-graded-potential-mechanism"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/neuron-action-potential-description/", "id": "h2H6POZowiU", "title": "Neuron action potential description", "kind": "Video", "slug": "neuron-action-potential-description"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/neuron-action-potential-mechanism/", "id": "MZz4OUOyFvg", "title": "Neuron action potential mechanism", "kind": "Video", "slug": "neuron-action-potential-mechanism"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/effects-of-axon-diameter-and-myelination/", "id": "_Lj_F9GADa4", "title": "Effects of axon diameter and myelination", "kind": "Video", "slug": "effects-of-axon-diameter-and-myelination"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials/action-potential-patterns/", "id": "jM-gvSqsP5A", "title": "Action potential patterns", "kind": "Video", "slug": "action-potential-patterns"}], "in_knowledge_map": false, "description": "3A: As you visually process this webpage, countless action potentials are taking place across the neurons in the occipital lobe of your brain. An action potential is an extremely quick change in the membrane potential of the neuron that can propagate toward other neurons. It\u2019s like one neuron is telling another neuron \u201cHey, wake up! We have work to do!\u201d You will soon gain an appreciation for the mechanism of the action potential, which allows for communication between neurons of all flavors in your body- from those responsible for the maintenance of memory to those functioning in sensation.", "node_slug": "rn-neuron-membrane-potentials", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials", "extended_slug": "test-prep/nclex-rn/nervous-system-phy/rn-neuron-membrane-potentials", "kind": "Topic", "slug": "rn-neuron-membrane-potentials"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses/", "id": "rn-neuronal-synapses", "hide": false, "title": "Neuronal synapses", "child_data": [{"kind": "Video", "id": "x078b055b"}, {"kind": "Video", "id": "xf45480de"}, {"kind": "Video", "id": "x0adae408"}, {"kind": "Video", "id": "x87ddf0ff"}, {"kind": "Video", "id": "x305db132"}, {"kind": "Video", "id": "x3d2e6106"}], "children": [{"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses/synapse-structure/", "id": "iqf3ft0mh1M", "title": "Synapse structure", "kind": "Video", "slug": "synapse-structure"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses/neurotransmitter-release/", "id": "Ac-Npt3vgCE", "title": "Neurotransmitter release", "kind": "Video", "slug": "neurotransmitter-release"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses/types-of-neurotransmitters/", "id": "FXYX_ksRwIk", "title": "Types of neurotransmitters", "kind": "Video", "slug": "types-of-neurotransmitters"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses/types-of-neurotransmitter-receptors/", "id": "yg44T2HcA2o", "title": "Types of neurotransmitter receptors", "kind": "Video", "slug": "types-of-neurotransmitter-receptors"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses/neurotransmitter-removal/", "id": "FO10z7FX13c", "title": "Neurotransmitter removal", "kind": "Video", "slug": "neurotransmitter-removal"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses/neuroplasticity/", "id": "J8wW1t1JqUc", "title": "Neuroplasticity", "kind": "Video", "slug": "neuroplasticity"}], "in_knowledge_map": false, "description": "3A: Synapses are the means by which neurons, just like other cells of the body, communicate with each other as well as other cells, like muscles and glands. They are the equivalent of neural telephone lines allowing for the transmission of a neurotransmitter, that is, the message. Thus, you are able to tell a dog from a cat. and a ball from a rock. Without all this cross-talk, you might look at an object without truly seeing or hear a sound without actually listening.", "node_slug": "rn-neuronal-synapses", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses", "extended_slug": "test-prep/nclex-rn/nervous-system-phy/rn-neuronal-synapses", "kind": "Topic", "slug": "rn-neuronal-synapses"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-biosignaling/", "id": "rn-biosignaling", "hide": false, "title": "Biosignaling", "child_data": [{"kind": "Video", "id": "x6589e16e"}, {"kind": "Video", "id": "xbc73c884"}, {"kind": "Video", "id": "x7e31c319"}, {"kind": "Video", "id": "xd63ac3ee"}], "children": [{"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-biosignaling/membrane-receptors/", "id": "8Otn9DVkm-g", "title": "Membrane Receptors", "kind": "Video", "description": "Learn about how membrane receptors work in our body.", "slug": "membrane-receptors"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-biosignaling/ligand-gated-ion-channels/", "id": "Pl7nzXaVqak", "title": "Ligand Gated Ion Channels", "kind": "Video", "description": "Learn about how ligand gated ion channels work in the cell membrane.", "slug": "ligand-gated-ion-channels"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-biosignaling/g-protein-coupled-receptors/", "id": "ZBSo_GFN3qI", "title": "G Protein Coupled Receptors", "kind": "Video", "description": "Learn about how g protein coupled receptors work in the cell membrane.", "slug": "g-protein-coupled-receptors"}, {"path": "khan/test-prep/nclex-rn/nervous-system-phy/rn-biosignaling/enzyme-linked-receptors/", "id": "kaoRrzakjGE", "title": "Enzyme Linked Receptors", "kind": "Video", "description": "Learn about how enzyme linked receptors, particularly Receptor Tyrosine Kinases, work in the body.", "slug": "enzyme-linked-receptors"}], "in_knowledge_map": false, "description": "3A: The human body is composed of about 100 trillion cells (this is not counting your bacterial buddies, who actually outnumber your cells 10 to 1!) Your cells must speak to each other to coordinate this massive symphony of life. In this tutorial, you will learn about the molecular basis of cellular signaling that makes this vast network speedy and efficient.", "node_slug": "rn-biosignaling", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/nervous-system-phy/rn-biosignaling", "extended_slug": "test-prep/nclex-rn/nervous-system-phy/rn-biosignaling", "kind": "Topic", "slug": "rn-biosignaling"}], "in_knowledge_map": false, "description": "3A: The very fact that you are able to understand this sentence means that neurons in your brain (85 billion in total) are talking to each other. Neurons are the living substance of the nervous system, which extends beyond the brain to the spinal cord and peripherally, allows you to think and process, make decisions, stand up straight, maintain your heart rate, rest and digest. You will come to appreciate the structure and function of the nervous system as we delve into its anatomy and physiology, from the gray and white matter to the cerebellum to the neurons.", "node_slug": "nervous-system-phy", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/nervous-system-phy", "extended_slug": "test-prep/nclex-rn/nervous-system-phy", "kind": "Topic", "slug": "nervous-system-phy"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/", "id": "rn-nervous-system-diseases", "hide": false, "title": "Nervous system diseases", "child_data": [{"kind": "Topic", "id": "x6e7f64af"}, {"kind": "Topic", "id": "xfffa19d7"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/", "id": "rn-parkinsons-disease", "hide": false, "title": "Parkinson's disease", "child_data": [{"kind": "Article", "id": "x2ed372cb"}, {"kind": "Video", "id": "x0510cb8d"}, {"kind": "Video", "id": "x526dd53f"}, {"kind": "Video", "id": "x2ede8a12"}, {"kind": "Video", "id": "xdf7a6891"}, {"kind": "Video", "id": "xe54cadaf"}, {"kind": "Video", "id": "x5713f158"}, {"kind": "Video", "id": "x9e8c5fb9"}, {"kind": "Video", "id": "x1f7fee7d"}, {"kind": "Video", "id": "xe35676e0"}, {"kind": "Video", "id": "x2d7a17c4"}, {"kind": "Video", "id": "xc76fc064"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/what-is-parkinsons-disease/", "id": "3n8UjH9h_8I", "title": "What is Parkinson's disease?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-parkinsons-disease"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/movement-signs-and-symptoms-of-parkinsons-disease/", "id": "4qdD4Ny34cc", "title": "Movement signs and symptoms of Parkinson's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "movement-signs-and-symptoms-of-parkinsons-disease"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/non-movement-symptoms-of-parkinsons-disease/", "id": "ZqWB25yUWnc", "title": "Non-movement symptoms of Parkinson's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "non-movement-symptoms-of-parkinsons-disease"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/the-basal-ganglia-the-direct-pathway/", "id": "Mmev06nabvk", "title": "The basal ganglia - The direct pathway", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-basal-ganglia-the-direct-pathway"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/the-basal-ganglia-concepts-of-the-indirect-pathway/", "id": "wLOEXEi7Uos", "title": "The basal ganglia - Concepts of the indirect pathway", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-basal-ganglia-concepts-of-the-indirect-pathway"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/putting-it-all-together-pathophysiology-of-parkinsons-disease/", "id": "8mvUDiBQbjg", "title": "Putting it all together - Pathophysiology of Parkinson's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "putting-it-all-together-pathophysiology-of-parkinsons-disease"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/the-basal-ganglia-details-of-the-indirect-pathway/", "id": "VZer0w7foLg", "title": "The basal ganglia - Details of the indirect pathway", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-basal-ganglia-details-of-the-indirect-pathway"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/genetics-and-parkinsons-disease/", "id": "FsE3QvWqeqs", "title": "Genetics and Parkinson's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "genetics-and-parkinsons-disease"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/diagnosing-parkinsons-disease/", "id": "Ny8a3eNG68M", "title": "Diagnosing Parkinson's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-parkinsons-disease"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/managing-parkinsons-disease-with-medications/", "id": "5hM8xUB07Y0", "title": "Managing Parkinson's disease with medications", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "managing-parkinsons-disease-with-medications"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease/managing-parkinsons-disease-with-surgery/", "id": "HFecdPI_-dg", "title": "Managing Parkinson's disease with surgery", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "managing-parkinsons-disease-with-surgery"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-parkinsons-disease", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease", "extended_slug": "test-prep/nclex-rn/rn-nervous-system-diseases/rn-parkinsons-disease", "kind": "Topic", "slug": "rn-parkinsons-disease"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/", "id": "rn-multiple-sclerosis", "hide": false, "title": "Multiple sclerosis", "child_data": [{"kind": "Article", "id": "x147fdcd7"}, {"kind": "Video", "id": "xb47532ad"}, {"kind": "Video", "id": "x27c3c6b9"}, {"kind": "Video", "id": "x13ddfc5f"}, {"kind": "Video", "id": "xf887cf62"}, {"kind": "Video", "id": "x6dc21d00"}, {"kind": "Video", "id": "x5f347c5a"}, {"kind": "Video", "id": "xdddc6f64"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/what-is-multiple-sclerosis/", "id": "P_HHvi7Kwzk", "title": "What is multiple sclerosis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-multiple-sclerosis"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/multiple-sclerosis-signs-and-symptoms/", "id": "A8ZK4VWmbGc", "title": "Multiple sclerosis signs and symptoms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "multiple-sclerosis-signs-and-symptoms"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/clinical-progression-of-multiple-sclerosis/", "id": "qCs7HPSDL8A", "title": "Clinical progression of multiple sclerosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "clinical-progression-of-multiple-sclerosis"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/multiple-sclerosis-pathophysiology/", "id": "aERRyWMwyvk", "title": "Multiple sclerosis pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "multiple-sclerosis-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/multiple-sclerosis-risk-factors/", "id": "yby2zx6q_yQ", "title": "Multiple sclerosis risk factors", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "multiple-sclerosis-risk-factors"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/multiple-sclerosis-diagnosis/", "id": "y1PCYctq3yo", "title": "Multiple sclerosis diagnosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "multiple-sclerosis-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis/multiple-sclerosis-treatment/", "id": "8exiUQAiw3w", "title": "Multiple sclerosis treatment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "multiple-sclerosis-treatment"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-multiple-sclerosis", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis", "extended_slug": "test-prep/nclex-rn/rn-nervous-system-diseases/rn-multiple-sclerosis", "kind": "Topic", "slug": "rn-multiple-sclerosis"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-nervous-system-diseases", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-nervous-system-diseases", "extended_slug": "test-prep/nclex-rn/rn-nervous-system-diseases", "kind": "Topic", "slug": "rn-nervous-system-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/", "id": "rn-integumentary-system-physiology", "hide": false, "title": "Integumentary system physiology", "child_data": [{"kind": "Topic", "id": "x3fd53289"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/", "id": "rn-integumentary-system", "hide": false, "title": "Integumentary system", "child_data": [{"kind": "Video", "id": "xbcdaefeb"}, {"kind": "Video", "id": "x23a3b3fe"}, {"kind": "Video", "id": "x19e6aeea"}, {"kind": "Video", "id": "xb8babf76"}, {"kind": "Video", "id": "xf641d7d7"}, {"kind": "Video", "id": "1022193589"}, {"kind": "Video", "id": "x98d6edc4"}, {"kind": "Video", "id": "x1e0f9664"}, {"kind": "Video", "id": "x3c61aa8e"}, {"kind": "Video", "id": "x7f17449b"}, {"kind": "Video", "id": "x7926b1ce"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/meet-the-skin/", "id": "4zKjzl0futI", "title": "Meet the skin! (Overview)", "kind": "Video", "slug": "meet-the-skin"}, {"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/what-is-skin/", "id": "TjYbFdSY0LA", "title": "What is skin? (Epidermis)", "kind": "Video", "slug": "what-is-skin"}, {"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/what-lies-beneath-the-epidermis-dermis-and-hypodermis/", "id": "Vn-tOBUvnD8", "title": "What lies beneath the epidermis? (Dermis and Hypodermis)", "kind": "Video", "slug": "what-lies-beneath-the-epidermis-dermis-and-hypodermis"}, {"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/where-do-our-nails-and-hair-come-from/", "id": "RD0waXH62AI", "title": "Where do our nails and hair come from?", "kind": "Video", "slug": "where-do-our-nails-and-hair-come-from"}, {"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/whats-in-sweat-holocrine-apocrine-and-merocrine-glands/", "id": "A44_Sqifi0U", "title": "What's in sweat? (Holocrine, Apocrine, Merocrine Glands)", "kind": "Video", "slug": "whats-in-sweat-holocrine-apocrine-and-merocrine-glands"}, {"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/lebron-asks-why-does-sweating-cool-you-down/", "id": "jgnNhL2jSXY", "title": "LeBron Asks: Why does sweating cool you down?", "kind": "Video", "description": "LeBron asks Sal why sweating helps cool the body down.", "slug": "lebron-asks-why-does-sweating-cool-you-down"}, {"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/overview-of-sensation-and-meissners-corpuscles/", "id": "0-pHx5rKKqI", "title": "Overview of Sensation and Meissner's Corpuscle", "kind": "Video", "slug": "overview-of-sensation-and-meissners-corpuscles"}, {"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/pacinians-corpuscle-and-merkels-disk/", "id": "IW8OnV8J2Qw", "title": "Pacinian's Corpuscle and Merkel's Disk", "kind": "Video", "slug": "pacinians-corpuscle-and-merkels-disk"}, {"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/ruffinis-ending-and-hair-follicle-receptor-2/", "id": "k9cj_rZO448", "title": "Ruffini's Ending and Hair Follicle Receptor", "kind": "Video", "slug": "ruffinis-ending-and-hair-follicle-receptor-2"}, {"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/pain-and-temperature-1/", "id": "D-oAsFIHqbY", "title": "Pain and temperature", "kind": "Video", "description": "Explore our senses of pain & temperature. \u00a0By Ron.", "slug": "pain-and-temperature-1"}, {"path": "khan/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system/thermoregulation-by-muscles/", "id": "HfXqyPS5bRo", "title": "Thermoregulation by muscles", "kind": "Video", "description": "Why do we shiver when it's cold? How do our muscles make sure we don't freeze or have a heat stroke? Learn how the skin, brain, blood vessels, and muscles work together to maintain our core body temperature.\u00a0 By Raja Narayan.", "slug": "thermoregulation-by-muscles"}], "in_knowledge_map": false, "description": "3B: There is really more than meets the eye with skin. Yes, it does make us look nicer than a bag of bones, muscles, and organs. But it also serves other important purposes which range from guarding the body against infection to sensation to allowing for metabolism of vitamin D. We will explore the structure and function of skin from the macroscopic to the microscopic level in this tutorial.", "node_slug": "rn-integumentary-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system", "extended_slug": "test-prep/nclex-rn/rn-integumentary-system-physiology/rn-integumentary-system", "kind": "Topic", "slug": "rn-integumentary-system"}], "in_knowledge_map": false, "description": "3B: There is really more than meets the eye with skin. Yes, it does make us look nicer than a bag of bones, muscles, and organs. But it also serves other important purposes which range from guarding the body against infection to sensation to allowing for metabolism of vitamin D. We will explore the structure and function of skin from the macroscopic to the microscopic level in this tutorial.", "node_slug": "rn-integumentary-system-physiology", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-integumentary-system-physiology", "extended_slug": "test-prep/nclex-rn/rn-integumentary-system-physiology", "kind": "Topic", "slug": "rn-integumentary-system-physiology"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/", "id": "rn-reproductive-system-physiology", "hide": false, "title": "Reproductive system physiology", "child_data": [{"kind": "Topic", "id": "xd6d19c67"}, {"kind": "Topic", "id": "x046166dd"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/", "id": "rn-reproductive-system", "hide": false, "title": "Reproductive system", "child_data": [{"kind": "Video", "id": "x765c2a69"}, {"kind": "Video", "id": "x6d80ffca"}, {"kind": "Video", "id": "x5701261a"}, {"kind": "Video", "id": "xc50a9018"}, {"kind": "Video", "id": "xb4562311"}, {"kind": "Video", "id": "x692b7bba"}, {"kind": "Video", "id": "xf4dafb4e"}, {"kind": "Video", "id": "1192840523"}, {"kind": "Video", "id": "x2accaf63"}, {"kind": "Video", "id": "xdcc4fd4d"}, {"kind": "Video", "id": "x2cd75462"}, {"kind": "Video", "id": "x1e317267"}, {"kind": "Video", "id": "x7b808228"}, {"kind": "Video", "id": "x2ba850e1"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/welcome-to-the-reproductive-system/", "id": "jRYEqOOrjH8", "title": "Welcome to the reproductive system", "kind": "Video", "slug": "welcome-to-the-reproductive-system"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/anatomy-of-the-male-reproductive-system/", "id": "_ce-IVjQYws", "title": "Anatomy of the male reproductive system", "kind": "Video", "slug": "anatomy-of-the-male-reproductive-system"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/transport-of-sperm-via-erection-and-ejaculation/", "id": "XLoLvz0r550", "title": "Transport of sperm via erection and ejaculation", "kind": "Video", "slug": "transport-of-sperm-via-erection-and-ejaculation"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/spermatogenesis/", "id": "QUJ-xnv53UM", "title": "Spermatogenesis", "kind": "Video", "slug": "spermatogenesis"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/testosterone/", "id": "k4e70nG3T8U", "title": "Testosterone", "kind": "Video", "slug": "testosterone"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/basics-of-egg-development/", "id": "Msrym4oGVSk", "title": "Basics of egg development", "kind": "Video", "slug": "basics-of-egg-development"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/the-ovarian-cycle/", "id": "VYSFNwTUkG0", "title": "The ovarian cycle", "kind": "Video", "slug": "the-ovarian-cycle"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/meet-the-placenta/", "id": "bQioHx12JuY", "title": "Meet the placenta!", "kind": "Video", "description": "Learn how the needs of the fetus are met by the placenta, which is a special organ that belongs to both the mother and the fetus! Rishi is a pediatric infectious disease physician and works at Khan Academy.", "slug": "meet-the-placenta"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/reproductive-cycle-graph-follicular-phase/", "id": "gmKAuceSf-s", "title": "Reproductive cycle graph - Follicular phase", "kind": "Video", "slug": "reproductive-cycle-graph-follicular-phase"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/reproductive-cycle-graph-luteal-phase/", "id": "uA7Xny276sk", "title": "Reproductive cycle graph - Luteal phase", "kind": "Video", "slug": "reproductive-cycle-graph-luteal-phase"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/estrogen/", "id": "eK7Gp6AWnuY", "title": "Estrogen", "kind": "Video", "slug": "estrogen"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/maternal-changes-in-pregnancy/", "id": "A0sp7I9rlz8", "title": "Maternal changes in pregnancy", "kind": "Video", "slug": "maternal-changes-in-pregnancy"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/labor-parturition/", "id": "GxQAAqRzwNw", "title": "Labor (parturition)", "kind": "Video", "slug": "labor-parturition"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system/breast-anatomy-and-lactation/", "id": "bflHwVKgRNE", "title": "Breast anatomy and lactation", "kind": "Video", "slug": "breast-anatomy-and-lactation"}], "in_knowledge_map": false, "description": "Our genes are survivors. Even though a person might die, his or her genes will go on to the next generation and then the next generation\u2026 Some genes are exactly the same as the ones in your great-great-great-grandmother! Yet, with the exception of identical twins, we are all genetically distinct from our family members. Starting with sexual reproduction and then the development of a baby, we\u2019re going to take a journey that starts with our own microscopic beginning, and ends with a fully formed baby entering the world.", "node_slug": "rn-reproductive-system", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system", "extended_slug": "test-prep/nclex-rn/rn-reproductive-system-physiology/rn-reproductive-system", "kind": "Topic", "slug": "rn-reproductive-system"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/", "id": "rn-pregnancy", "hide": false, "title": "Pregnancy and pregnancy complications", "child_data": [{"kind": "Article", "id": "xec5c03a8"}, {"kind": "Video", "id": "x380dab05"}, {"kind": "Video", "id": "x77eb3f28"}, {"kind": "Video", "id": "x31a4d3bc"}, {"kind": "Video", "id": "x0ad026e6"}, {"kind": "Video", "id": "xaf91f593"}, {"kind": "Video", "id": "x787d0f51"}, {"kind": "Video", "id": "xec8bbf07"}, {"kind": "Video", "id": "xe22de1f5"}, {"kind": "Video", "id": "xbf2a59a1"}, {"kind": "Video", "id": "x5b734914"}, {"kind": "Video", "id": "x6b79265f"}, {"kind": "Video", "id": "x022fd0b9"}, {"kind": "Video", "id": "x4da554f5"}, {"kind": "Video", "id": "x40f0d8b1"}, {"kind": "Video", "id": "xfcdccc9d"}, {"kind": "Video", "id": "x9de2a6ca"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/diagnosis-of-pregnancy/", "id": "OnlHXSBv0M4", "title": "Diagnosis of pregnancy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-of-pregnancy"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/pregnancy-physiology-i/", "id": "IKRT-boQTr0", "title": "Pregnancy physiology I", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pregnancy-physiology-i"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/labor/", "id": "Bf04LcSBpDw", "title": "Labor", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "labor"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/postpartum-physiology/", "id": "wfnefFAmYjg", "title": "Postpartum physiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "postpartum-physiology"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/preeclampsia/", "id": "70tpqg58Oug", "title": "Preeclampsia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preeclampsia"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/placenta-previa/", "id": "DMCowipIXgE", "title": "Placenta previa", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "placenta-previa"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/placental-abruption/", "id": "79NnsYrAXz4", "title": "Placental abruption", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "placental-abruption"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/placenta-accreta/", "id": "x3EMTQQjoA0", "title": "Placenta accreta", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "placenta-accreta"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/utis-in-pregnancy/", "id": "YEQNnO64wLc", "title": "UTIs in pregnancy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "utis-in-pregnancy"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/blood-conditions-in-pregnancy/", "id": "e4baNHUxP8I", "title": "Blood conditions in pregnancy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "blood-conditions-in-pregnancy"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/sheehan-syndrome/", "id": "1exN1kFX2wI", "title": "Sheehan syndrome", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "sheehan-syndrome"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/postpartum-hemorrhage/", "id": "ZSLMm5KNGEc", "title": "Postpartum hemorrhage", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "postpartum-hemorrhage"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/uterine-inversion/", "id": "OW0Yq2nWyuY", "title": "Uterine inversion", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "uterine-inversion"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/diabetes-in-pregnancy/", "id": "N3jnRuzseoM", "title": "Diabetes in pregnancy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diabetes-in-pregnancy"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/preterm-labor/", "id": "lt3nPxVTC5M", "title": "Preterm labor", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preterm-labor"}, {"path": "khan/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy/c-section/", "id": "NQFiGK0M69s", "title": "C-section", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "c-section"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-pregnancy", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy", "extended_slug": "test-prep/nclex-rn/rn-reproductive-system-physiology/rn-pregnancy", "kind": "Topic", "slug": "rn-pregnancy"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-reproductive-system-physiology", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-reproductive-system-physiology", "extended_slug": "test-prep/nclex-rn/rn-reproductive-system-physiology", "kind": "Topic", "slug": "rn-reproductive-system-physiology"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/", "id": "rn-infectious-diseases", "hide": false, "title": "Infectious diseases", "child_data": [{"kind": "Topic", "id": "xc180031a"}, {"kind": "Topic", "id": "xbb492c3c"}, {"kind": "Topic", "id": "x00016150"}, {"kind": "Topic", "id": "xd9960a06"}, {"kind": "Topic", "id": "xaa563283"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/", "id": "rn-sexually-transmitted-diseases", "hide": false, "title": "Sexually transmitted diseases", "child_data": [{"kind": "Article", "id": "x4c5154f0"}, {"kind": "Video", "id": "x9255c7d0"}, {"kind": "Video", "id": "xfaab0d9a"}, {"kind": "Video", "id": "x7548632f"}, {"kind": "Video", "id": "x3137e568"}, {"kind": "Video", "id": "x0d776d10"}, {"kind": "Video", "id": "x8505c46b"}, {"kind": "Video", "id": "x6a71a329"}, {"kind": "Video", "id": "xca817718"}, {"kind": "Video", "id": "x9e98e97f"}, {"kind": "Video", "id": "x671b2f60"}, {"kind": "Video", "id": "x7d92d25e"}, {"kind": "Video", "id": "x76c8aa44"}, {"kind": "Video", "id": "x8b6a8061"}, {"kind": "Video", "id": "x460f8b7c"}, {"kind": "Video", "id": "xe8777d89"}, {"kind": "Video", "id": "x9c840f5e"}, {"kind": "Video", "id": "x77477619"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-gonorrhea/", "id": "AYeVIV-TxRk", "title": "What is gonorrhea?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-gonorrhea"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/pathophysiology-diagnosis-treatment-and-prevention-of-gonorrhea/", "id": "6gV_k7ACbY8", "title": "Pathophysiology, diagnosis, treatment, and prevention of gonorrhea", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pathophysiology-diagnosis-treatment-and-prevention-of-gonorrhea"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-chlamydia/", "id": "NDXHVKOg8BQ", "title": "What is chlamydia?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-chlamydia"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/pathophysiology-of-chlamydia/", "id": "qKe9sZQPV-Y", "title": "Pathophysiology of chlamydia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pathophysiology-of-chlamydia"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/diagnosis-treatment-and-prevention-of-chlamydia/", "id": "dfd0l10gPPY", "title": "Diagnosis, treatment, and prevention of chlamydia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-treatment-and-prevention-of-chlamydia"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-syphilis/", "id": "IE9hAzVAGeY", "title": "What is syphilis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-syphilis"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-tertiary-syphilis/", "id": "CvO0a7suxmY", "title": "What is tertiary syphilis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-tertiary-syphilis"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-congenital-syphilis/", "id": "h7-OynSK2x0", "title": "What is congenital syphilis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-congenital-syphilis"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/diagnosis-treatment-and-prevention-of-syphilis/", "id": "T_c343e0msA", "title": "Diagnosis, treatment, and prevention of syphilis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-treatment-and-prevention-of-syphilis"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-chancroid/", "id": "I1rULaaHZ6M", "title": "What is chancroid?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-chancroid"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-trichomoniasis/", "id": "yk0P7IpSiIg", "title": "What is trichomoniasis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-trichomoniasis"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-herpes/", "id": "qtbb4YBJbJM", "title": "What is herpes?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-herpes"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/pathophysiology-of-herpes/", "id": "RGMEhaeXlUw", "title": "Pathophysiology of herpes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pathophysiology-of-herpes"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-neonatal-herpes/", "id": "-8cCBEFlOyw", "title": "What is neonatal herpes?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-neonatal-herpes"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/diagnosis-treatment-and-prevention-of-herpes/", "id": "MFMutlhgfzI", "title": "Diagnosis, treatment, and prevention of herpes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-treatment-and-prevention-of-herpes"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-are-warts/", "id": "QN231qRvkr0", "title": "What are warts?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-are-warts"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases/what-is-bacterial-vaginosis/", "id": "RGLGy6r423s", "title": "What is bacterial vaginosis?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-bacterial-vaginosis"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-sexually-transmitted-diseases", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases", "extended_slug": "test-prep/nclex-rn/rn-infectious-diseases/rn-sexually-transmitted-diseases", "kind": "Topic", "slug": "rn-sexually-transmitted-diseases"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-polio/", "id": "rn-polio", "hide": false, "title": "Polio", "child_data": [{"kind": "Article", "id": "x0f394085"}, {"kind": "Video", "id": "x16765d40"}, {"kind": "Video", "id": "xe1621b13"}, {"kind": "Video", "id": "x03a87b98"}, {"kind": "Video", "id": "x460001b1"}, {"kind": "Video", "id": "x886a2ecd"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-polio/what-is-polio/", "id": "K9eZTm4TL2c", "title": "What is polio?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-polio"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-polio/poliomyelitis-pathophysiology/", "id": "aBBTiPsYUVA", "title": "Poliomyelitis pathophysiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "poliomyelitis-pathophysiology"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-polio/polio-epidemiology/", "id": "qGNqyXIQaqQ", "title": "Polio epidemiology", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "polio-epidemiology"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-polio/poliomyelitis-diagnosis-and-treatment/", "id": "Y6ENEA7FzvU", "title": "Poliomyelitis diagnosis and treatment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "poliomyelitis-diagnosis-and-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-polio/polio-vaccinations/", "id": "Ovype5DUI04", "title": "Polio vaccinations", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "polio-vaccinations"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-polio", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-infectious-diseases/rn-polio", "extended_slug": "test-prep/nclex-rn/rn-infectious-diseases/rn-polio", "kind": "Topic", "slug": "rn-polio"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/", "id": "rn-hiv-and-aids", "hide": false, "title": "HIV and AIDS", "child_data": [{"kind": "Article", "id": "x0de74aaf"}, {"kind": "Video", "id": "x5fbeb2c4"}, {"kind": "Video", "id": "x63a339c7"}, {"kind": "Video", "id": "xd70d0f46"}, {"kind": "Video", "id": "xd59cbaec"}, {"kind": "Video", "id": "x1d3d8473"}, {"kind": "Video", "id": "xcb85bfad"}, {"kind": "Video", "id": "xe5ffe7f4"}, {"kind": "Video", "id": "x3c60e7dc"}, {"kind": "Video", "id": "xc6f21981"}, {"kind": "Video", "id": "x25e18323"}, {"kind": "Video", "id": "xcf5b610e"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/what-is-hiv-and-aids/", "id": "17pfZUlAqow", "title": "What is HIV and AIDS?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-hiv-and-aids"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/transmission-of-hiv/", "id": "WJUcZPqgEXU", "title": "Transmission of HIV", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "transmission-of-hiv"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/how-hiv-infects-us-mucous-membranes-dendritic-cells-and-lymph-nodes/", "id": "ZroXIBg8keA", "title": "How HIV infects us: Mucous membranes, dendritic cells, and lymph nodes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "how-hiv-infects-us-mucous-membranes-dendritic-cells-and-lymph-nodes"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/how-hiv-infects-us-cd4-t-helper-lymphocyte-infection/", "id": "Zi4Fqc8Fkws", "title": "How HIV infects us: CD4 (T-helper) lymphocyte infection", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "how-hiv-infects-us-cd4-t-helper-lymphocyte-infection"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/how-hiv-kills-so-many-cd4-t-cells/", "id": "8gnpnUFNloo", "title": "How HIV kills so many CD4 T cells", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "how-hiv-kills-so-many-cd4-t-cells"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/diagnosing-hiv-concepts-and-tests/", "id": "3CjCAeGhtHA", "title": "Diagnosing HIV - Concepts and tests", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-hiv-concepts-and-tests"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/treating-hiv-antiretroviral-drugs/", "id": "GR9d9wrOl5E", "title": "Treating HIV: Antiretroviral drugs", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treating-hiv-antiretroviral-drugs"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/haart-treatment-for-hiv-who-what-why-when-and-how/", "id": "e85nerRGfWw", "title": "HAART treatment for HIV - Who, what, why, when, and how", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "haart-treatment-for-hiv-who-what-why-when-and-how"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/defining-aids-and-aids-defining-illnesses-bumper/", "id": "OZ9IP0xeQho", "title": "Defining AIDS and AIDS defining illnesses", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "defining-aids-and-aids-defining-illnesses-bumper"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/immune-reconstitution-inflammatory-syndrome-iris-in-aids/", "id": "p5RIcbLBTQQ", "title": "Immune reconstitution inflammatory syndrome (IRIS) in AIDS", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "immune-reconstitution-inflammatory-syndrome-iris-in-aids"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids/preventing-an-hiv-infection/", "id": "WDdF9ArqklA", "title": "Preventing an HIV infection", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preventing-an-hiv-infection"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-hiv-and-aids", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids", "extended_slug": "test-prep/nclex-rn/rn-infectious-diseases/rn-hiv-and-aids", "kind": "Topic", "slug": "rn-hiv-and-aids"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/malaria-rn/", "id": "malaria-rn", "hide": false, "title": "Malaria", "child_data": [{"kind": "Article", "id": "xaa52961d"}, {"kind": "Video", "id": "xa29728d0"}, {"kind": "Video", "id": "xec1ca366"}, {"kind": "Video", "id": "x317931f6"}, {"kind": "Video", "id": "xe6b792ee"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/malaria-rn/the-basics-of-malaria/", "id": "NtvJirrHhZM", "title": "The basics of malaria", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-basics-of-malaria"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/malaria-rn/diagnosing-malaria/", "id": "gezAvbjMiBU", "title": "Diagnosing malaria", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-malaria"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/malaria-rn/treatment-of-malaria/", "id": "6vDwG_rz_PU", "title": "Treatment of malaria", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatment-of-malaria"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/malaria-rn/preventing-malaria/", "id": "INmIcOPKo_M", "title": "Preventing malaria", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preventing-malaria"}], "in_knowledge_map": false, "description": "", "node_slug": "malaria-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-infectious-diseases/malaria-rn", "extended_slug": "test-prep/nclex-rn/rn-infectious-diseases/malaria-rn", "kind": "Topic", "slug": "malaria-rn"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/", "id": "tuberculosis-rn", "hide": false, "title": "Tuberculosis", "child_data": [{"kind": "Article", "id": "x888832f4"}, {"kind": "Video", "id": "x29195b3b"}, {"kind": "Video", "id": "x8a44aa61"}, {"kind": "Video", "id": "x78ad6189"}, {"kind": "Video", "id": "x21432e85"}, {"kind": "Video", "id": "x01adc883"}, {"kind": "Video", "id": "x83ba10b3"}, {"kind": "Video", "id": "xbe2b5861"}, {"kind": "Video", "id": "x1ad461d7"}, {"kind": "Video", "id": "xc014a915"}, {"kind": "Video", "id": "xe2f122ee"}, {"kind": "Video", "id": "xcbaac90c"}, {"kind": "Video", "id": "x8a772643"}, {"kind": "Video", "id": "xae1e013d"}, {"kind": "Video", "id": "xc348c3fa"}, {"kind": "Video", "id": "x4ee1362f"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/what-is-tb/", "id": "wV1pllyOaj8", "title": "What is TB?", "kind": "Video", "description": "Find out the basics of TB, where it comes from and where it goes. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-tb"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/tb-epidemiology/", "id": "56tSt0TpnAk", "title": "TB epidemiology", "kind": "Video", "description": "Find out how many lives are affected by TB around the world. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "tb-epidemiology"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/tb-pathogenesis/", "id": "S0Kak0qQFgM", "title": "TB pathogenesis", "kind": "Video", "description": "Find out exactly how TB causes damage to the lungs. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "tb-pathogenesis"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/primary-and-secondary-tb/", "id": "3Em2Zzn796Q", "title": "Primary and Secondary TB", "kind": "Video", "description": "Learn some key features of primary TB and how it differs from secondary TB. Rishi is a pediatric infectious disease physician and works at Khan Academy.These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "primary-and-secondary-tb"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/pulmonary-tb/", "id": "tp_qdvgXtVc", "title": "Pulmonary TB", "kind": "Video", "description": "Learn the effects that TB has on the lungs and some important clinical clues.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "pulmonary-tb"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/extrapulmonary-tb-part-1/", "id": "Oa6dezr0JkE", "title": "Extrapulmonary TB (part 1)", "kind": "Video", "description": "Learn about how TB can spread beyond your lungs.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "extrapulmonary-tb-part-1"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/extrapulmonary-tb-part-2/", "id": "C4nfSAr2eWI", "title": "Extrapulmonary TB (Part 2)", "kind": "Video", "description": "Learn about how TB can spread beyond your lungs.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "extrapulmonary-tb-part-2"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/mantoux-test-aka-ppd-or-tst/", "id": "qbXKrR9BQmg", "title": "Mantoux test (aka. PPD or TST)", "kind": "Video", "description": "Learn how the Mantoux test is done and how it works. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "mantoux-test-aka-ppd-or-tst"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/interpreting-the-ppd/", "id": "m9b_h7TiRR8", "title": "Interpreting the PPD", "kind": "Video", "description": "Find out how the cutoff for a \"positive PPD\" depends on clinical clues. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "interpreting-the-ppd"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/diagnosing-active-tb/", "id": "faqhDcrWfHQ", "title": "Diagnosing active TB", "kind": "Video", "description": "Find out how we can use clinical clues to help figure out if someone has active TB infection.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-active-tb"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/preventing-tb-transmission/", "id": "hAXnQgU4bsg", "title": "Preventing TB transmission", "kind": "Video", "description": "There are a number of ways that we can help to prevent TB from spreading, learn some of the most common ones. Rishi is a pediatric infectious disease physician and works at Khan Academy.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preventing-tb-transmission"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/preventing-tb-using-the-4-i-s/", "id": "_20mkyAB7tY", "title": "Preventing TB using the \"4 I's\"", "kind": "Video", "description": "Learn how to help prevent TB disease using Intensive case finding, Isoniazid, Isolation, and Immunization.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "preventing-tb-using-the-4-i-s"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/treatment-of-active-tb/", "id": "2K1ekrZ6ej4", "title": "Treatment of Active TB", "kind": "Video", "description": "Learn which medications help prevent active TB disease.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatment-of-active-tb"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/drug-resistant-tb/", "id": "vce3BZFo27Y", "title": "Drug-resistant TB", "kind": "Video", "description": "Learn the different types of drug-resistant TB \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "drug-resistant-tb"}, {"path": "khan/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn/tb-and-hiv/", "id": "S8s-g7KZR50", "title": "TB and HIV", "kind": "Video", "description": "Two deadly diseases, HIV and TB, can often co-exist in the same patient.\n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "tb-and-hiv"}], "in_knowledge_map": false, "description": "Almost one third of the entire world\u2019s population is infected with Mycobacterium tuberculosis, the type of bacteria that causes TB. Although only a fraction of these people will actually become sick with the disease, in 2012, the World Health Organization reported 1.3 million TB related deaths. The good news is that health care workers and public health officials around the world have done a great job of helping to detect and treat the disease early. The bad news is that TB is developing drug resistance. Learn more about this ancient disease, that still plagues us in the modern-day.", "node_slug": "tuberculosis-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn", "extended_slug": "test-prep/nclex-rn/rn-infectious-diseases/tuberculosis-rn", "kind": "Topic", "slug": "tuberculosis-rn"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-infectious-diseases", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-infectious-diseases", "extended_slug": "test-prep/nclex-rn/rn-infectious-diseases", "kind": "Topic", "slug": "rn-infectious-diseases"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/nclex-rn/rn-mental-health/", "id": "rn-mental-health", "hide": false, "title": "Mental health", "child_data": [{"kind": "Topic", "id": "xd0ef18f8"}, {"kind": "Topic", "id": "xf4d58b3a"}, {"kind": "Topic", "id": "xd7749352"}, {"kind": "Topic", "id": "x1fb3906a"}, {"kind": "Topic", "id": "xf1d09d63"}, {"kind": "Topic", "id": "x65575f93"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/", "id": "rn-drug-abuse-and-drug-addictions", "hide": false, "title": "Drug abuse and drug addictions", "child_data": [{"kind": "Article", "id": "x670c0ec1"}, {"kind": "Video", "id": "x208ae23e"}, {"kind": "Video", "id": "x02913912"}, {"kind": "Video", "id": "x9fcc3ef2"}, {"kind": "Video", "id": "x6118b7f7"}, {"kind": "Video", "id": "xba154a49"}, {"kind": "Video", "id": "xeae6721c"}, {"kind": "Video", "id": "xe7444058"}, {"kind": "Video", "id": "x412842f8"}, {"kind": "Video", "id": "xc55ff290"}, {"kind": "Video", "id": "xbf60eaaa"}, {"kind": "Video", "id": "x8f1aad59"}, {"kind": "Video", "id": "xf9d9325a"}, {"kind": "Video", "id": "x103fbff6"}, {"kind": "Video", "id": "x94a2a9c2"}, {"kind": "Video", "id": "x98131611"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/overview-of-psychoactive-drugs/", "id": "icD3l5bhhKY", "title": "Overview of psychoactive drugs", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "overview-of-psychoactive-drugs"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/psychoactive-drugs-depressants-and-opiates/", "id": "dOlkogaWF3M", "title": "Psychoactive drugs: Depressants and opiates", "kind": "Video", "slug": "psychoactive-drugs-depressants-and-opiates"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/psychoactive-drugs-stimulants/", "id": "1Smz0zwAELQ", "title": "Psychoactive drugs: Stimulants", "kind": "Video", "slug": "psychoactive-drugs-stimulants"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/psychoactive-drugs-hallucinogens/", "id": "GUwV0gibLx8", "title": "Psychoactive drugs: Hallucinogens", "kind": "Video", "slug": "psychoactive-drugs-hallucinogens"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/routes-of-drug-entry/", "id": "dPmkIEkxXwc", "title": "Routes of drug entry", "kind": "Video", "slug": "routes-of-drug-entry"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/drug-dependence-and-homeostasis/", "id": "X4W44wJbJgk", "title": "Drug dependence and homeostasis", "kind": "Video", "slug": "drug-dependence-and-homeostasis"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/reward-pathway-in-the-brain/", "id": "YzCYuKX6zp8", "title": "Reward pathway in the brain", "kind": "Video", "slug": "reward-pathway-in-the-brain"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/tolerance-and-withdrawal/", "id": "3vKLU5_Hgco", "title": "Tolerance and withdrawal", "kind": "Video", "slug": "tolerance-and-withdrawal"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/risk-factors-for-drug-use-and-drug-abuse/", "id": "R23KUZvjg4A", "title": "Risk factors for drug use and drug abuse", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "risk-factors-for-drug-use-and-drug-abuse"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/substance-use-disorders/", "id": "LhFXw1xmaSM", "title": "Substance use disorders", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "substance-use-disorders"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/the-development-of-substance-use-why-do-people-use-legal-and-illegal-substances/", "id": "0nKP1FdSzEg", "title": "The development of substance use - Why do people use legal and illegal substances?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "the-development-of-substance-use-why-do-people-use-legal-and-illegal-substances"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/why-do-some-people-but-not-others-develop-substance-use-problems/", "id": "2cz2tH5vE1Q", "title": "Why do some people but not others develop substance use problems?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "why-do-some-people-but-not-others-develop-substance-use-problems"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/treatments-and-triggers-for-drug-dependence/", "id": "TK7NnXGrWfA", "title": "Treatments and triggers for drug dependence", "kind": "Video", "slug": "treatments-and-triggers-for-drug-dependence"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/how-does-substance-use-develop-into-substance-abuse/", "id": "Qw37BqzvEvw", "title": "How does substance use develop into substance abuse", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "how-does-substance-use-develop-into-substance-abuse"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions/drug-use-prevention-school-programming-and-protective-factors/", "id": "LunoLU3XFKc", "title": "Drug use prevention - school programming and protective factors", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "drug-use-prevention-school-programming-and-protective-factors"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-drug-abuse-and-drug-addictions", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions", "extended_slug": "test-prep/nclex-rn/rn-mental-health/rn-drug-abuse-and-drug-addictions", "kind": "Topic", "slug": "rn-drug-abuse-and-drug-addictions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/", "id": "depression-and-related-disorders-rn", "hide": false, "title": "Depression and related disorders", "child_data": [{"kind": "Article", "id": "x144e8037"}, {"kind": "Video", "id": "x915207a0"}, {"kind": "Video", "id": "xee5a1ef6"}, {"kind": "Video", "id": "x25a6fe6f"}, {"kind": "Video", "id": "xe2b79837"}, {"kind": "Video", "id": "xdb42e3a0"}, {"kind": "Video", "id": "xeb1f7f74"}, {"kind": "Video", "id": "xd897460e"}, {"kind": "Video", "id": "x559054e5"}, {"kind": "Video", "id": "x81ba7507"}, {"kind": "Video", "id": "xcda96635"}, {"kind": "Article", "id": "x2e7e267e"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/introduction-to-psychology-depression-and-major-depressive-disorder/", "id": "diVGZxXh-dg", "title": "Introduction to psychology - Depression and major depressive disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "introduction-to-psychology-depression-and-major-depressive-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/diagnosing-depression-2/", "id": "IHgoDWM9hAc", "title": "Diagnosing depression", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-depression-2"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/introduction-to-psychology-depression-and-bipolar-disorder/", "id": "rhxsZnrA46s", "title": "Introduction to psychology - Depression and bipolar disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "introduction-to-psychology-depression-and-bipolar-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/diagnosing-bipolar-disorder/", "id": "PCOevYD9cb4", "title": "Diagnosing bipolar disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-bipolar-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/types-of-depression-and-bipolar-disorder-in-the-dsm5/", "id": "eSXZwk8axmI", "title": "Types of depression and bipolar disorder in the DSM5", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "types-of-depression-and-bipolar-disorder-in-the-dsm5"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/biological-basis-of-depression/", "id": "QEjWLj5wAFM", "title": "Biological basis of depression", "kind": "Video", "slug": "biological-basis-of-depression"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/risk-factors-for-bipolar-disorder/", "id": "JAg8IrTs5K0", "title": "Risk factors for bipolar disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "risk-factors-for-bipolar-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/treating-depression-with-antidepressants/", "id": "xgsbxmiPOrg", "title": "Treating depression with antidepressants", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treating-depression-with-antidepressants"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/treatments-for-depression-psychological-therapies/", "id": "DKXAHh9PZJQ", "title": "Treatments for depression - Psychological therapies", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatments-for-depression-psychological-therapies"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn/treatments-for-bipolar-disorder/", "id": "zJ5w4YhOyN8", "title": "Treatments for bipolar disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatments-for-bipolar-disorder"}], "in_knowledge_map": false, "description": "", "node_slug": "depression-and-related-disorders-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn", "extended_slug": "test-prep/nclex-rn/rn-mental-health/depression-and-related-disorders-rn", "kind": "Topic", "slug": "depression-and-related-disorders-rn"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-mental-health/anxiety-rn/", "id": "anxiety-rn", "hide": false, "title": "Anxiety", "child_data": [{"kind": "Article", "id": "xdca594af"}, {"kind": "Video", "id": "xaddea933"}, {"kind": "Video", "id": "xc6a52454"}, {"kind": "Video", "id": "xc5245b7d"}, {"kind": "Article", "id": "x431ad70f"}, {"kind": "Video", "id": "x35b6d305"}, {"kind": "Article", "id": "xc5e5e364"}, {"kind": "Video", "id": "x04a55f2e"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-mental-health/anxiety-rn/generalized-anxiety-disorder/", "id": "eSM1p2vN7vg", "title": "Generalized anxiety disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "generalized-anxiety-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/anxiety-rn/phobias/", "id": "_AuTtAkRN3w", "title": "Phobias", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "phobias"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/anxiety-rn/panic-disorder/", "id": "VmV6RlsUwO8", "title": "Panic disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "panic-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/anxiety-rn/obsessive-compulsive-disorder/", "id": "8gX_LBv4ZD0", "title": "Obsessive compulsive disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "obsessive-compulsive-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/anxiety-rn/post-traumatic-stress-disorder/", "id": "Q0meIMQJ73I", "title": "Post traumatic stress disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "post-traumatic-stress-disorder"}], "in_knowledge_map": false, "description": "", "node_slug": "anxiety-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-mental-health/anxiety-rn", "extended_slug": "test-prep/nclex-rn/rn-mental-health/anxiety-rn", "kind": "Topic", "slug": "anxiety-rn"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/", "id": "psychotic-disorders-rn", "hide": false, "title": "Psychotic disorders", "child_data": [{"kind": "Article", "id": "xb99b1eca"}, {"kind": "Video", "id": "xab72c94b"}, {"kind": "Video", "id": "xbf57aaca"}, {"kind": "Video", "id": "x6299afcb"}, {"kind": "Video", "id": "x2432e6b7"}, {"kind": "Video", "id": "x20c95e2b"}, {"kind": "Video", "id": "x8d6cfc8b"}, {"kind": "Video", "id": "x51a5290e"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/psychosis/", "id": "g0LPpW6Iqzo", "title": "Psychosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "psychosis"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/schizophrenia-symptoms/", "id": "dU_rYyPGYiE", "title": "Schizophrenia symptoms", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizophrenia-symptoms"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/schizophrenia-diagnosis/", "id": "te4AkzFprbI", "title": "Schizophrenia diagnosis", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizophrenia-diagnosis"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/schizophrenia-treatment/", "id": "stSvcwY0RWI", "title": "Schizophrenia treatment", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizophrenia-treatment"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/schizoaffective-disorder/", "id": "hBBCp9RvmoQ", "title": "Schizoaffective disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizoaffective-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/schizotypal-personality-disorder/", "id": "jBu5M0gXGos", "title": "Schizotypal personality disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "schizotypal-personality-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn/delusional-disorder/", "id": "YbSEybahiVA", "title": "Delusional disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "delusional-disorder"}], "in_knowledge_map": false, "description": "", "node_slug": "psychotic-disorders-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn", "extended_slug": "test-prep/nclex-rn/rn-mental-health/psychotic-disorders-rn", "kind": "Topic", "slug": "psychotic-disorders-rn"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/", "id": "dementia-delirium-alzheimers-rn", "hide": false, "title": "Dementia, delirium, and Alzheimer's", "child_data": [{"kind": "Article", "id": "xdc2f0f4f"}, {"kind": "Video", "id": "x9cf6de8f"}, {"kind": "Video", "id": "x413bb94d"}, {"kind": "Video", "id": "xb2c3cfd3"}, {"kind": "Video", "id": "x502e58b3"}, {"kind": "Video", "id": "x29f311e5"}, {"kind": "Video", "id": "xf9261ddc"}, {"kind": "Video", "id": "x4d822894"}, {"kind": "Video", "id": "xf1b45195"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/what-are-dementia-and-alzheimers/", "id": "xUSpHmvW14c", "title": "What are dementia and Alzheimer's", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-are-dementia-and-alzheimers"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/alzheimers-disease-plaques-and-tangles/", "id": "kx5LBj6P-0E", "title": "Alzheimer's disease: Plaques and tangles", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "alzheimers-disease-plaques-and-tangles"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/other-types-of-dementia/", "id": "-DDSEQlZKsE", "title": "Other types of dementia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "other-types-of-dementia"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/risk-factors-for-dementia/", "id": "9CzYnHVFsuk", "title": "Risk factors for dementia", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "risk-factors-for-dementia"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/stages-of-dementia-and-alzheimers-disease/", "id": "K7dP25_Sebo", "title": "Stages of dementia and Alzheimer's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "stages-of-dementia-and-alzheimers-disease"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/diagnosis-of-dementia-and-alzheimers-disease/", "id": "LieVEfI4luw", "title": "Diagnosis of dementia and Alzheimer's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosis-of-dementia-and-alzheimers-disease"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/treatment-of-dementia-and-alzheimers-disease/", "id": "durV0mnzPo4", "title": "Treatment of dementia and Alzheimer's disease", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "treatment-of-dementia-and-alzheimers-disease"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn/what-is-delirium/", "id": "dhlkyIiD_RA", "title": "What is delirium?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-delirium"}], "in_knowledge_map": false, "description": "", "node_slug": "dementia-delirium-alzheimers-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn", "extended_slug": "test-prep/nclex-rn/rn-mental-health/dementia-delirium-alzheimers-rn", "kind": "Topic", "slug": "dementia-delirium-alzheimers-rn"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/", "id": "neurodevelopmental-disorders-rn", "hide": false, "title": "Neurodevelopmental disorders", "child_data": [{"kind": "Article", "id": "x1074ddfd"}, {"kind": "Article", "id": "x5d07a036"}, {"kind": "Video", "id": "xf2a497f3"}, {"kind": "Video", "id": "x03ad1eee"}, {"kind": "Video", "id": "x13e35161"}, {"kind": "Video", "id": "x471f0674"}, {"kind": "Video", "id": "x84893776"}, {"kind": "Video", "id": "x021a2f65"}, {"kind": "Video", "id": "x9e2fafc9"}, {"kind": "Article", "id": "xfc4d9630"}, {"kind": "Video", "id": "xe69f1f1e"}, {"kind": "Video", "id": "xfa8263b2"}, {"kind": "Video", "id": "xdc0ff370"}, {"kind": "Video", "id": "xfb0f98ec"}, {"kind": "Video", "id": "x7602394c"}], "children": [{"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/intro-to-neurodevelopment-milestones/", "id": "4qbb4f1I67k", "title": "Intro to neurodevelopment milestones", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "intro-to-neurodevelopment-milestones"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/neurodevelopmental-disorders-sufficient-and-necessary-causes/", "id": "lc5XDJIgz1s", "title": "Neurodevelopmental disorders: Sufficient and necessary causes", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "neurodevelopmental-disorders-sufficient-and-necessary-causes"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/what-is-cerebral-palsy-and-what-causes-it/", "id": "ii1MBfj7-Sk", "title": "What is cerebral palsy and what causes it?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-cerebral-palsy-and-what-causes-it"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/types-of-cerebral-palsy-part-1-spastic/", "id": "26Rq8an37Q8", "title": "Types of cerebral palsy part 1 - Spastic", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "types-of-cerebral-palsy-part-1-spastic"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/types-of-cerebral-palsy-part-2-dyskinetic-and-ataxic/", "id": "3s-n4eFypPc", "title": "Types of cerebral palsy part 2 - Dyskinetic and ataxic", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "types-of-cerebral-palsy-part-2-dyskinetic-and-ataxic"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/diagnosing-cerebral-palsy/", "id": "DoNiKvnYW_A", "title": "Diagnosing cerebral palsy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-cerebral-palsy"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/managing-cerebral-palsy/", "id": "uD7nKhiLB40", "title": "Managing cerebral palsy", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "managing-cerebral-palsy"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/what-is-autism-spectrum-disorder/", "id": "WuSuIgiOPqM", "title": "What is autism spectrum disorder?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-autism-spectrum-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/what-is-tourettes/", "id": "cNaonU-UFcY", "title": "What is Tourette's?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-tourettes"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/diagnosing-autism-spectrum-disorder/", "id": "XmDfHU0hS18", "title": "Diagnosing autism spectrum disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "diagnosing-autism-spectrum-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/managing-autism-spectrum-disorder/", "id": "2oKVTTHA5u0", "title": "Managing autism spectrum disorder", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "managing-autism-spectrum-disorder"}, {"path": "khan/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn/what-is-asperger-syndrome/", "id": "CNSd1HufEcM", "title": "What is asperger syndrome?", "kind": "Video", "description": "Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. \n\nThese videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.", "slug": "what-is-asperger-syndrome"}], "in_knowledge_map": false, "description": "", "node_slug": "neurodevelopmental-disorders-rn", "render_type": "Tutorial", "topic_page_url": "/test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn", "extended_slug": "test-prep/nclex-rn/rn-mental-health/neurodevelopmental-disorders-rn", "kind": "Topic", "slug": "neurodevelopmental-disorders-rn"}], "in_knowledge_map": false, "description": "", "node_slug": "rn-mental-health", "render_type": "Topic", "topic_page_url": "/test-prep/nclex-rn/rn-mental-health", "extended_slug": "test-prep/nclex-rn/rn-mental-health", "kind": "Topic", "slug": "rn-mental-health"}], "in_knowledge_map": false, "description": "This content has been developed to support nursing students preparing for the National Council Licensing Examination for Registered Nurses (NCLEX-RN). All of this content has been created under the direction of Khan Academy and has been reviewed under the direction of the the American Association of Colleges of Nursing (AACN). This content is intended to be a supplemental resource for nursing graduates, not a program of study for the NCLEX-RN exam. These videos, questions, and articles are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/by-nc-sa/3.0/us/). The NCLEX-RN is administered by the National Council of State Boards of Nursing (NCSBN). For more information on the NCLEX-RN, visit: https://www.ncsbn.org/nclex.htm", "node_slug": "nclex-rn", "render_type": "Subject", "topic_page_url": "/test-prep/nclex-rn", "extended_slug": "test-prep/nclex-rn", "kind": "Topic", "slug": "nclex-rn"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/gmat/", "id": "gmat", "hide": false, "title": "GMAT", "child_data": [{"kind": "Topic", "id": "x75c53e99"}, {"kind": "Topic", "id": "x2f623f20"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/gmat/problem-solving/", "id": "problem-solving", "hide": false, "title": "Problem solving", "child_data": [{"kind": "Video", "id": "25067"}, {"kind": "Video", "id": "25069"}, {"kind": "Video", "id": "25071"}, {"kind": "Video", "id": "25073"}, {"kind": "Video", "id": "25075"}, {"kind": "Video", "id": "25077"}, {"kind": "Video", "id": "25079"}, {"kind": "Video", "id": "25081"}, {"kind": "Video", "id": "25083"}, {"kind": "Video", "id": "25085"}, {"kind": "Video", "id": "25087"}, {"kind": "Video", "id": "25089"}, {"kind": "Video", "id": "25091"}, {"kind": "Video", "id": "25093"}, {"kind": "Video", "id": "25095"}, {"kind": "Video", "id": "25097"}, {"kind": "Video", "id": "25099"}, {"kind": "Video", "id": "25101"}, {"kind": "Video", "id": "25103"}, {"kind": "Video", "id": "25105"}, {"kind": "Video", "id": "25107"}, {"kind": "Video", "id": "25109"}, {"kind": "Video", "id": "25111"}, {"kind": "Video", "id": "25113"}, {"kind": "Video", "id": "25115"}, {"kind": "Video", "id": "25117"}, {"kind": "Video", "id": "25119"}, {"kind": "Video", "id": "25121"}, {"kind": "Video", "id": "25123"}, {"kind": "Video", "id": "25125"}, {"kind": "Video", "id": "25127"}, {"kind": "Video", "id": "25129"}, {"kind": "Video", "id": "25131"}, {"kind": "Video", "id": "25133"}, {"kind": "Video", "id": "25135"}, {"kind": "Video", "id": "25137"}, {"kind": "Video", "id": "25139"}, {"kind": "Video", "id": "25141"}, {"kind": "Video", "id": "25143"}, {"kind": "Video", "id": "25145"}, {"kind": "Video", "id": "25147"}, {"kind": "Video", "id": "25149"}, {"kind": "Video", "id": "25151"}, {"kind": "Video", "id": "25153"}, {"kind": "Video", "id": "25155"}, {"kind": "Video", "id": "25157"}, {"kind": "Video", "id": "25159"}, {"kind": "Video", "id": "25161"}, {"kind": "Video", "id": "25163"}, {"kind": "Video", "id": "25165"}, {"kind": "Video", "id": "25167"}, {"kind": "Video", "id": "25169"}, {"kind": "Video", "id": "25171"}, {"kind": "Video", "id": "25173"}], "children": [{"path": "khan/test-prep/gmat/problem-solving/gmat-math-1/", "id": "jciijU8Mj_Y", "title": "GMAT: Math 1", "kind": "Video", "description": "1-6, pg. 152", "slug": "gmat-math-1"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-2/", "id": "UlHo2cxKA84", "title": "GMAT: Math 2", "kind": "Video", "description": "7-11, pg. 153", "slug": "gmat-math-2"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-3/", "id": "G8s3SkAm-gM", "title": "GMAT: Math 3", "kind": "Video", "description": "12-19, pgs. 153-154", "slug": "gmat-math-3"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-4/", "id": "X58FV7MwdbY", "title": "GMAT: Math 4", "kind": "Video", "description": "20-23, pgs. 154-155", "slug": "gmat-math-4"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-5/", "id": "fRTx45FJWto", "title": "GMAT: Math 5", "kind": "Video", "description": "24-29, pgs. 155-156", "slug": "gmat-math-5"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-6/", "id": "Q59w-ACX30M", "title": "GMAT: Math 6", "kind": "Video", "description": "30-35, pg. 156", "slug": "gmat-math-6"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-7/", "id": "HqiBo62O8bk", "title": "GMAT: Math 7", "kind": "Video", "description": "36-41, pgs. 156-157", "slug": "gmat-math-7"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-8/", "id": "yZtpr_curdc", "title": "GMAT: Math 8", "kind": "Video", "description": "42-48, pgs. 157-158", "slug": "gmat-math-8"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-9/", "id": "HkBFunEh8iY", "title": "GMAT: Math 9", "kind": "Video", "description": "49-54, pgs. 158-159", "slug": "gmat-math-9"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-10/", "id": "E8HagppxzxY", "title": "GMAT: Math 10", "kind": "Video", "description": "55-60, pg. 159", "slug": "gmat-math-10"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-11/", "id": "YOlP6xmw7zU", "title": "GMAT: Math 11", "kind": "Video", "description": "61-64, pg. 160", "slug": "gmat-math-11"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-12/", "id": "VdBZSEF_FhU", "title": "GMAT: Math 12", "kind": "Video", "description": "65-69, pgs. 160-161", "slug": "gmat-math-12"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-13/", "id": "9r8Wb7prWZA", "title": "GMAT: Math 13", "kind": "Video", "description": "70-75, pg. 161", "slug": "gmat-math-13"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-14/", "id": "M8TOJrI6cJc", "title": "GMAT: Math 14", "kind": "Video", "description": "76-80, pg. 162", "slug": "gmat-math-14"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-15/", "id": "BdSNiuJnZa8", "title": "GMAT: Math 15", "kind": "Video", "description": "81-86, pgs. 162-163", "slug": "gmat-math-15"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-16/", "id": "dA1u8RD49dU", "title": "GMAT: Math 16", "kind": "Video", "description": "87-91, pg. 163", "slug": "gmat-math-16"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-17/", "id": "f3TQEpL7dk4", "title": "GMAT: Math 17", "kind": "Video", "description": "92-95, pg. 164", "slug": "gmat-math-17"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-18/", "id": "ITc5DeU1zaw", "title": "GMAT: Math 18", "kind": "Video", "description": "96-99, pgs. 164-165", "slug": "gmat-math-18"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-19/", "id": "m44llkkWI0g", "title": "GMAT: Math 19", "kind": "Video", "description": "100-105, pg. 165", "slug": "gmat-math-19"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-20/", "id": "-Jx6vyc_830", "title": "GMAT: Math 20", "kind": "Video", "description": "106-109, pg. 166", "slug": "gmat-math-20"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-21/", "id": "tcm-v12m7hU", "title": "GMAT: Math 21", "kind": "Video", "description": "110-114, pgs. 166-167", "slug": "gmat-math-21"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-22/", "id": "Zplk5NcBt3c", "title": "GMAT: Math 22", "kind": "Video", "description": "115-119, pgs. 168-169", "slug": "gmat-math-22"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-23/", "id": "Qod67l16LfQ", "title": "GMAT: Math 23", "kind": "Video", "description": "120-123, pg. 168", "slug": "gmat-math-23"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-24/", "id": "QR9K8M4u8rk", "title": "GMAT: Math 24", "kind": "Video", "description": "124-128, pgs. 168-169", "slug": "gmat-math-24"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-25/", "id": "A6FP-2d3GnQ", "title": "GMAT: Math 25", "kind": "Video", "description": "129-132, pgs. 169-170", "slug": "gmat-math-25"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-26/", "id": "ucqaqTR6EK8", "title": "GMAT: Math 26", "kind": "Video", "description": "133-137, pg. 170", "slug": "gmat-math-26"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-27/", "id": "SEtkn9S-WHY", "title": "GMAT: Math 27", "kind": "Video", "description": "138-142, pg. 171", "slug": "gmat-math-27"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-28/", "id": "4r6QHJzu8YQ", "title": "GMAT: Math 28", "kind": "Video", "description": "143-147, pgs. 171-172", "slug": "gmat-math-28"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-29/", "id": "WBWV_uvgC6w", "title": "GMAT: Math 29", "kind": "Video", "description": "148-153, pgs. 172-173", "slug": "gmat-math-29"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-30/", "id": "zpnjkbJNp90", "title": "GMAT: Math 30", "kind": "Video", "description": "154-160, pg. 173", "slug": "gmat-math-30"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-31/", "id": "wYGKRP0gD3I", "title": "GMAT: Math 31", "kind": "Video", "description": "161-162, pg. 174", "slug": "gmat-math-31"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-32/", "id": "uG2VpBYd-Hk", "title": "GMAT: Math 32", "kind": "Video", "description": "163-166, pg. 174", "slug": "gmat-math-32"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-33/", "id": "wdINk29ZSMA", "title": "GMAT: Math 33", "kind": "Video", "description": "167-172, pgs. 174-175", "slug": "gmat-math-33"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-34/", "id": "OgxsswJEZ7k", "title": "GMAT: Math 34", "kind": "Video", "description": "173-176, pgs. 175-176", "slug": "gmat-math-34"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-35/", "id": "FEYN0jK1-pI", "title": "GMAT: Math 35", "kind": "Video", "description": "177-180, pg. 176", "slug": "gmat-math-35"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-36/", "id": "x8pEjhCc5ug", "title": "GMAT: Math 36", "kind": "Video", "description": "180(simpler)-184, pgs. 176-177", "slug": "gmat-math-36"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-37/", "id": "QcAr1552o84", "title": "GMAT: Math 37", "kind": "Video", "description": "185-189, pgs. 177-178", "slug": "gmat-math-37"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-38/", "id": "-y9SELk3UNU", "title": "GMAT: Math 38", "kind": "Video", "description": "190-194, pg. 178", "slug": "gmat-math-38"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-39/", "id": "1bj7FPzUiWc", "title": "GMAT: Math 39", "kind": "Video", "description": "195-197, pgs. 178-179", "slug": "gmat-math-39"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-40/", "id": "oug9h9-komI", "title": "GMAT: Math 40", "kind": "Video", "description": "198-200, pg. 179", "slug": "gmat-math-40"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-41/", "id": "4WOjZ9lQdHE", "title": "GMAT: Math 41", "kind": "Video", "description": "201-204, pgs. 179-180", "slug": "gmat-math-41"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-42/", "id": "q0AkvTchhPI", "title": "GMAT: Math 42", "kind": "Video", "description": "205-206, pg. 180", "slug": "gmat-math-42"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-43/", "id": "xvyQP-oezXc", "title": "GMAT: Math 43", "kind": "Video", "description": "207-209, pgs. 180-181", "slug": "gmat-math-43"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-44/", "id": "IDkhHTjlg0M", "title": "GMAT: Math 44", "kind": "Video", "description": "210-213, pg. 181", "slug": "gmat-math-44"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-45/", "id": "o0azgDKAFNI", "title": "GMAT: Math 45", "kind": "Video", "description": "214-216, pg. 181", "slug": "gmat-math-45"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-46/", "id": "rLI88bU7Fuo", "title": "GMAT: Math 46", "kind": "Video", "description": "217-220, pg. 182", "slug": "gmat-math-46"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-47/", "id": "iwamZ7r2tTE", "title": "GMAT: Math 47", "kind": "Video", "description": "221-225, pgs. 182-183", "slug": "gmat-math-47"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-48/", "id": "nZ90fsoVvmc", "title": "GMAT: Math 48", "kind": "Video", "description": "226, pg. 183", "slug": "gmat-math-48"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-49/", "id": "1-9n4Upditg", "title": "GMAT: Math 49", "kind": "Video", "description": "227-231, pgs. 183-184", "slug": "gmat-math-49"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-50/", "id": "OvRAIlok3fA", "title": "GMAT: Math 50", "kind": "Video", "description": "232-236, pgs. 184-185", "slug": "gmat-math-50"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-51/", "id": "AwKTZK8gqZI", "title": "GMAT: Math 51", "kind": "Video", "description": "237-239, pg. 185", "slug": "gmat-math-51"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-52/", "id": "tixLZtDnbTg", "title": "GMAT: Math 52", "kind": "Video", "description": "240-244, pgs. 185-186", "slug": "gmat-math-52"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-53/", "id": "cY-iPEtvJAE", "title": "GMAT: Math 53", "kind": "Video", "description": "245-247, pg. 186", "slug": "gmat-math-53"}, {"path": "khan/test-prep/gmat/problem-solving/gmat-math-54/", "id": "EiZJzWPTm0I", "title": "GMAT: Math 54", "kind": "Video", "description": "248-249, pg. 186", "slug": "gmat-math-54"}], "in_knowledge_map": false, "description": "Sal works through the 249 problem solving questions in chapter 5 of the the 11th edition of the official GMAC GMAT Review (ISBN Number: 0-9765709-0-4 published in 2005)", "node_slug": "problem-solving", "render_type": "UncuratedTutorial", "topic_page_url": "/test-prep/gmat/problem-solving", "extended_slug": "test-prep/gmat/problem-solving", "kind": "Topic", "slug": "problem-solving"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/gmat/data-sufficiency/", "id": "data-sufficiency", "hide": false, "title": "Data sufficiency", "child_data": [{"kind": "Video", "id": "24983"}, {"kind": "Video", "id": "24985"}, {"kind": "Video", "id": "24987"}, {"kind": "Video", "id": "24989"}, {"kind": "Video", "id": "24991"}, {"kind": "Video", "id": "24993"}, {"kind": "Video", "id": "24995"}, {"kind": "Video", "id": "24997"}, {"kind": "Video", "id": "24999"}, {"kind": "Video", "id": "25001"}, {"kind": "Video", "id": "25003"}, {"kind": "Video", "id": "25005"}, {"kind": "Video", "id": "25007"}, {"kind": "Video", "id": "25009"}, {"kind": "Video", "id": "25011"}, {"kind": "Video", "id": "25013"}, {"kind": "Video", "id": "25015"}, {"kind": "Video", "id": "25017"}, {"kind": "Video", "id": "25019"}, {"kind": "Video", "id": "25021"}, {"kind": "Video", "id": "25023"}, {"kind": "Video", "id": "25025"}, {"kind": "Video", "id": "25027"}, {"kind": "Video", "id": "25029"}, {"kind": "Video", "id": "25031"}, {"kind": "Video", "id": "25033"}, {"kind": "Video", "id": "25035"}, {"kind": "Video", "id": "25037"}, {"kind": "Video", "id": "25039"}, {"kind": "Video", "id": "25041"}, {"kind": "Video", "id": "25043"}, {"kind": "Video", "id": "25045"}, {"kind": "Video", "id": "25047"}, {"kind": "Video", "id": "25049"}, {"kind": "Video", "id": "25051"}, {"kind": "Video", "id": "25053"}, {"kind": "Video", "id": "25055"}, {"kind": "Video", "id": "25057"}, {"kind": "Video", "id": "25059"}, {"kind": "Video", "id": "25061"}, {"kind": "Video", "id": "25063"}, {"kind": "Video", "id": "25065"}], "children": [{"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-1/", "id": "GZInN7p1D0M", "title": "GMAT: Data sufficiency 1", "kind": "Video", "description": "1-5, pg. 278", "slug": "gmat-data-sufficiency-1"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-2/", "id": "8nod8JWaO1o", "title": "GMAT: Data sufficiency 2", "kind": "Video", "description": "6-9, pg. 278", "slug": "gmat-data-sufficiency-2"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-3/", "id": "eg4r1ev0xYs", "title": "GMAT: Data sufficiency 3", "kind": "Video", "description": "10-15, pgs. 278-279", "slug": "gmat-data-sufficiency-3"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-4/", "id": "fMTLSOTAzWs", "title": "GMAT: Data sufficiency 4", "kind": "Video", "description": "16-21, pg. 279", "slug": "gmat-data-sufficiency-4"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-5/", "id": "wIPriEEti6o", "title": "GMAT: Data sufficiency 5", "kind": "Video", "description": "22-27, pg. 279", "slug": "gmat-data-sufficiency-5"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-6/", "id": "qHO1xH4ilZs", "title": "GMAT: Data sufficiency 6", "kind": "Video", "description": "28-32, pg. 280", "slug": "gmat-data-sufficiency-6"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-7/", "id": "21680hPTfUc", "title": "GMAT: Data sufficiency 7", "kind": "Video", "description": "33-36, pg. 280", "slug": "gmat-data-sufficiency-7"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-8/", "id": "nL-NSia0HiA", "title": "GMAT: Data sufficiency 8", "kind": "Video", "description": "37-41, pgs. 280-281", "slug": "gmat-data-sufficiency-8"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-9/", "id": "GviCdNfeXw8", "title": "GMAT: Data sufficiency 9", "kind": "Video", "description": "42-46, pg. 281", "slug": "gmat-data-sufficiency-9"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-10/", "id": "Sx_KqnkcJVA", "title": "GMAT: Data sufficiency 10", "kind": "Video", "description": "47-50, pg. 281", "slug": "gmat-data-sufficiency-10"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-11/", "id": "gpIJcqY0weE", "title": "GMAT: Data sufficiency 11", "kind": "Video", "description": "51-54, pgs. 281-282", "slug": "gmat-data-sufficiency-11"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-12/", "id": "dgZy7Uj8cAI", "title": "GMAT: Data sufficiency 12", "kind": "Video", "description": "55-58, pg. 282", "slug": "gmat-data-sufficiency-12"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-13/", "id": "qDsLxwmW_Ms", "title": "GMAT: Data sufficiency 13", "kind": "Video", "description": "59-62, pg. 282", "slug": "gmat-data-sufficiency-13"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-14/", "id": "iW3EP2FE5zc", "title": "GMAT: Data sufficiency 14", "kind": "Video", "description": "63-68, pgs. 282-283", "slug": "gmat-data-sufficiency-14"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-15/", "id": "ejIjaaocVvE", "title": "GMAT: Data sufficiency 15", "kind": "Video", "description": "68-72, pg. 283", "slug": "gmat-data-sufficiency-15"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-16/", "id": "3ia-sGkAVf8", "title": "GMAT: Data sufficiency 16", "kind": "Video", "description": "73-76, pg. 284", "slug": "gmat-data-sufficiency-16"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-17/", "id": "bcADF8WgLz4", "title": "GMAT: Data sufficiency 17", "kind": "Video", "description": "77-79, pg. 284", "slug": "gmat-data-sufficiency-17"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-18/", "id": "UR4Zr0hE-As", "title": "GMAT: Data sufficiency 18", "kind": "Video", "description": "80-83, pg. 284", "slug": "gmat-data-sufficiency-18"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-19/", "id": "C-qg2Lcy6Ts", "title": "GMAT: Data sufficiency 19", "kind": "Video", "description": "84-86, pg. 285", "slug": "gmat-data-sufficiency-19"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-20/", "id": "XFuFxgbnkaM", "title": "GMAT: Data sufficiency 20", "kind": "Video", "description": "87-90, pg. 285", "slug": "gmat-data-sufficiency-20"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-21/", "id": "V7vCaxe3Rys", "title": "GMAT: Data sufficiency 21", "kind": "Video", "description": "91-94, pgs. 285-286", "slug": "gmat-data-sufficiency-21"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-21-correction/", "id": "Lq-zp5_OgSY", "title": "GMAT: Data sufficiency 21 (correction)", "kind": "Video", "description": "94, pg. 286", "slug": "gmat-data-sufficiency-21-correction"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-22/", "id": "CdF-6PJ2jTM", "title": "GMAT: Data sufficiency 22", "kind": "Video", "description": "95-98, pg. 286", "slug": "gmat-data-sufficiency-22"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-23/", "id": "QOtyTZGWOmg", "title": "GMAT: Data sufficiency 23", "kind": "Video", "description": "99-102, pg. 286", "slug": "gmat-data-sufficiency-23"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-24/", "id": "NrIf451oN30", "title": "GMAT: Data sufficiency 24", "kind": "Video", "description": "103-106, pg. 287", "slug": "gmat-data-sufficiency-24"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-25/", "id": "kYWBbu-FXV0", "title": "GMAT: Data sufficiency 25", "kind": "Video", "description": "107-109, pg. 287", "slug": "gmat-data-sufficiency-25"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-26/", "id": "Lhop0mfeJMQ", "title": "GMAT: Data sufficiency 26", "kind": "Video", "description": "110-111, pg. 287", "slug": "gmat-data-sufficiency-26"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-27/", "id": "OzTqWpAPnrw", "title": "GMAT: Data sufficiency 27", "kind": "Video", "description": "112-115, pg. 287", "slug": "gmat-data-sufficiency-27"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-28/", "id": "vD1OROM3Lfo", "title": "GMAT: Data sufficiency 28", "kind": "Video", "description": "116-118, pg. 288", "slug": "gmat-data-sufficiency-28"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-29/", "id": "BCEyKQQOl8E", "title": "GMAT: Data sufficiency 29", "kind": "Video", "description": "119-120, pg. 288", "slug": "gmat-data-sufficiency-29"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-30/", "id": "o_eNoF1DnZs", "title": "GMAT: Data sufficiency 30", "kind": "Video", "description": "121-124, pg. 288", "slug": "gmat-data-sufficiency-30"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-31/", "id": "5BEaqN92vDk", "title": "GMAT: Data sufficiency 31", "kind": "Video", "description": "125-128, pg. 288", "slug": "gmat-data-sufficiency-31"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-32/", "id": "qVPtT8CX1eM", "title": "GMAT: Data sufficiency 32", "kind": "Video", "description": "129-131, pg. 289", "slug": "gmat-data-sufficiency-32"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-33/", "id": "-uZt8MLeDrg", "title": "GMAT: Data sufficiency 33", "kind": "Video", "description": "132-134, pg. 289", "slug": "gmat-data-sufficiency-33"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-34/", "id": "K_uaUQY6MVQ", "title": "GMAT: Data sufficiency 34", "kind": "Video", "description": "135-137, pg. 289", "slug": "gmat-data-sufficiency-34"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-35/", "id": "XuDGJ-LUnAU", "title": "GMAT: Data sufficiency 35", "kind": "Video", "description": "138-140, pg. 289", "slug": "gmat-data-sufficiency-35"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-36/", "id": "LDyMYyiAsQs", "title": "GMAT: Data sufficiency 36", "kind": "Video", "description": "141-142, pg. 289-290", "slug": "gmat-data-sufficiency-36"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-37/", "id": "wPA2FrET_Ac", "title": "GMAT: Data sufficiency 37", "kind": "Video", "description": "142-144, pg. 290", "slug": "gmat-data-sufficiency-37"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-38/", "id": "n1MbK-Qb7Mk", "title": "GMAT: Data sufficiency 38", "kind": "Video", "description": "145-147, pg. 290", "slug": "gmat-data-sufficiency-38"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-39/", "id": "lqv9dXXjfWE", "title": "GMAT: Data sufficiency 39", "kind": "Video", "description": "148-150, pg. 290", "slug": "gmat-data-sufficiency-39"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-40/", "id": "dmN_s286dHc", "title": "GMAT: Data sufficiency 40", "kind": "Video", "description": "151-153, pg. 290", "slug": "gmat-data-sufficiency-40"}, {"path": "khan/test-prep/gmat/data-sufficiency/gmat-data-sufficiency-41/", "id": "cMjJSUsaWvc", "title": "GMAT: Data sufficiency 41", "kind": "Video", "description": "154-155, pg. 290", "slug": "gmat-data-sufficiency-41"}], "in_knowledge_map": false, "description": "Sal works through the 155 data sufficiency questions in chapter 6 of the the 11th edition of the official GMAC GMAT Review (ISBN Number: 0-9765709-0-4 published in 2005)", "node_slug": "data-sufficiency", "render_type": "UncuratedTutorial", "topic_page_url": "/test-prep/gmat/data-sufficiency", "extended_slug": "test-prep/gmat/data-sufficiency", "kind": "Topic", "slug": "data-sufficiency"}], "in_knowledge_map": false, "description": "Sal works through problems in the 11th edition of the official GMAC GMAT Review (ISBN Number: 0-9765709-0-4 published in 2005). You should take the practice tests on your own, grade them and then use these videos to understand the problems you didn't get or to review. Have fun!", "node_slug": "gmat", "render_type": "Subject", "topic_page_url": "/test-prep/gmat", "extended_slug": "test-prep/gmat", "kind": "Topic", "slug": "gmat"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/cahsee-subject/", "id": "cahsee-subject", "hide": false, "title": "CAHSEE", "child_data": [{"kind": "Topic", "id": "x2e5e6cb0"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/cahsee-subject/cahsee/", "id": "cahsee", "hide": false, "title": "CAHSEE", "child_data": [{"kind": "Video", "id": "24050"}, {"kind": "Video", "id": "24052"}, {"kind": "Video", "id": "24054"}, {"kind": "Video", "id": "24056"}, {"kind": "Video", "id": "24058"}, {"kind": "Video", "id": "24060"}, {"kind": "Video", "id": "24062"}, {"kind": "Video", "id": "24064"}, {"kind": "Video", "id": "24066"}, {"kind": "Video", "id": "24068"}, {"kind": "Video", "id": "24070"}, {"kind": "Video", "id": "24072"}, {"kind": "Video", "id": "24074"}, {"kind": "Video", "id": "24076"}, {"kind": "Video", "id": "24078"}], "children": [{"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-1-3/", "id": "_yv3BrPt-cs", "title": "CAHSEE practice: Problems 1-3", "kind": "Video", "description": "CAHSEE Practice: Problems 1-3", "slug": "cahsee-practice-problems-1-3"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-4-9/", "id": "i1CSuZdIu98", "title": "CAHSEE practice: Problems 4-9", "kind": "Video", "description": "CAHSEE Practice: Problems 4-9", "slug": "cahsee-practice-problems-4-9"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-10-12/", "id": "4PIn_9cxefI", "title": "CAHSEE practice: Problems 10-12", "kind": "Video", "description": "CAHSEE Practice: Problems 10-12", "slug": "cahsee-practice-problems-10-12"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-13-14/", "id": "9xwAPXM0Flg", "title": "CAHSEE practice: Problems 13-14", "kind": "Video", "description": "CAHSEE Practice: Problems 13-14", "slug": "cahsee-practice-problems-13-14"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-15-16/", "id": "MwdwuDy0rRs", "title": "CAHSEE practice: Problems 15-16", "kind": "Video", "description": "CAHSEE Practice: Problems 15-16", "slug": "cahsee-practice-problems-15-16"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-17-19/", "id": "ah39bUxYDEg", "title": "CAHSEE practice: Problems 17-19", "kind": "Video", "description": "CAHSEE Practice: Problems 17-19", "slug": "cahsee-practice-problems-17-19"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-20-22/", "id": "ceM2u6IABWU", "title": "CAHSEE practice: Problems 20-22", "kind": "Video", "description": "CAHSEE Practice: Problems 20-22", "slug": "cahsee-practice-problems-20-22"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-23-27/", "id": "glumochcaw0", "title": "CAHSEE practice: Problems 23-27", "kind": "Video", "description": "CAHSEE Practice: Problems 23-27", "slug": "cahsee-practice-problems-23-27"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-28-31/", "id": "6Sy4E_8Psos", "title": "CAHSEE practice: Problems 28-31", "kind": "Video", "description": "CAHSEE Practice: Problems 28-31", "slug": "cahsee-practice-problems-28-31"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-32-34/", "id": "1k-jqxMuUaM", "title": "CAHSEE practice: Problems 32-34", "kind": "Video", "description": "CAHSEE Practice: Problems 32-34", "slug": "cahsee-practice-problems-32-34"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-35-37/", "id": "3A305Mhtkug", "title": "CAHSEE practice: Problems 35-37", "kind": "Video", "description": "CAHSEE Practice: Problems 35-37", "slug": "cahsee-practice-problems-35-37"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-38-42/", "id": "_qB9JCpr8Co", "title": "CAHSEE practice: Problems 38-42", "kind": "Video", "description": "CAHSEE Practice: Problems 38-42", "slug": "cahsee-practice-problems-38-42"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-43-46/", "id": "_rof2ExUzOU", "title": "CAHSEE practice: Problems 43-46", "kind": "Video", "description": "CAHSEE Practice: Problems 43-46", "slug": "cahsee-practice-problems-43-46"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-47-51/", "id": "ENg2ajvKYss", "title": "CAHSEE practice: Problems 47-51", "kind": "Video", "description": "CAHSEE Practice: Problems 47-51", "slug": "cahsee-practice-problems-47-51"}, {"path": "khan/test-prep/cahsee-subject/cahsee/cahsee-practice-problems-52-53/", "id": "FdD0Wu032R4", "title": "CAHSEE practice: Problems 52-53", "kind": "Video", "description": "CAHSEE Practice: Problems 52-53", "slug": "cahsee-practice-problems-52-53"}], "in_knowledge_map": false, "description": "Sal working through the 53 problems from the practice test available at http://www.cde.ca.gov/ta/tg/hs/documents/mathpractest.pdf for the CAHSEE (California High School Exit Examination). Clearly useful if you're looking to take that exam. Probably still useful if you want to make sure you have a solid understanding of basic high school math.", "node_slug": "cahsee", "render_type": "Tutorial", "topic_page_url": "/test-prep/cahsee-subject/cahsee", "extended_slug": "test-prep/cahsee-subject/cahsee", "kind": "Topic", "slug": "cahsee"}], "in_knowledge_map": false, "description": "", "node_slug": "cahsee-subject", "render_type": "Subject", "topic_page_url": "/test-prep/cahsee-subject", "extended_slug": "test-prep/cahsee-subject", "kind": "Topic", "slug": "cahsee-subject"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/iit-jee-subject/", "id": "iit-jee-subject", "hide": false, "title": "IIT JEE", "child_data": [{"kind": "Topic", "id": "x859feb00"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/iit-jee-subject/iit-jee/", "id": "iit-jee", "hide": false, "title": "IIT JEE", "child_data": [{"kind": "Video", "id": "8187432"}, {"kind": "Video", "id": "8187433"}, {"kind": "Video", "id": "8187434"}, {"kind": "Video", "id": "8187435"}, {"kind": "Video", "id": "8187436"}, {"kind": "Video", "id": "8187437"}, {"kind": "Video", "id": "8187438"}, {"kind": "Video", "id": "8187439"}, {"kind": "Video", "id": "8187440"}, {"kind": "Video", "id": "8187441"}, {"kind": "Video", "id": "8187442"}, {"kind": "Video", "id": "8187443"}, {"kind": "Video", "id": "8187444"}, {"kind": "Video", "id": "8187445"}, {"kind": "Video", "id": "8187446"}, {"kind": "Video", "id": "8187447"}, {"kind": "Video", "id": "8187448"}, {"kind": "Video", "id": "8187449"}, {"kind": "Video", "id": "8187450"}, {"kind": "Video", "id": "8187451"}, {"kind": "Video", "id": "8187452"}, {"kind": "Video", "id": "8187453"}, {"kind": "Video", "id": "8187454"}, {"kind": "Video", "id": "8187455"}, {"kind": "Video", "id": "8187456"}, {"kind": "Video", "id": "8187457"}, {"kind": "Video", "id": "8187458"}, {"kind": "Video", "id": "8187459"}, {"kind": "Video", "id": "8187460"}, {"kind": "Video", "id": "8187461"}, {"kind": "Video", "id": "8187462"}, {"kind": "Video", "id": "8187463"}, {"kind": "Video", "id": "8187464"}, {"kind": "Video", "id": "8187465"}, {"kind": "Video", "id": "8187466"}, {"kind": "Video", "id": "8187467"}, {"kind": "Video", "id": "8187468"}, {"kind": "Video", "id": "8187469"}, {"kind": "Video", "id": "8187470"}, {"kind": "Video", "id": "8187471"}], "children": [{"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-trigonometry-problem-1/", "id": "X7GT9JKoAbo", "title": "IIT JEE trigonometry problem 1", "kind": "Video", "description": "2010 IIT JEE Paper I #29 Trigonometry problem", "slug": "iit-jee-trigonometry-problem-1"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-perpendicular-planes-part-1/", "id": "2u535-HVJ_o", "title": "IIT JEE perpendicular planes (part 1)", "kind": "Video", "description": "2010 IIT JEE Paper 1 #30 normal vector and planes (Part 1)", "slug": "iit-jee-perpendicular-planes-part-1"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-perpendicular-plane-part-2/", "id": "66pQLO--Ghk", "title": "IIT JEE perpendicular plane (part 2)", "kind": "Video", "description": "2010 IIT JEE Paper 1 #30 normal vector and planes (Part 2)", "slug": "iit-jee-perpendicular-plane-part-2"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-complex-root-probability-part-1/", "id": "bV_HSZ_W0nk", "title": "IIT JEE complex root probability (part 1)", "kind": "Video", "description": "2010 Paper 1 problem 31 Math (part 1)", "slug": "iit-jee-complex-root-probability-part-1"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-complex-root-probability-part-2/", "id": "S3KMyYYGuPE", "title": "IIT JEE complex root probability (part 2)", "kind": "Video", "description": "2010 Paper 1 problem 31 Math (part 2).avi", "slug": "iit-jee-complex-root-probability-part-2"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-position-vectors/", "id": "GDXyGy5TjnI", "title": "IIT JEE position vectors", "kind": "Video", "description": "2010 IIT JEE Paper 1 problem 32 Position Vectors", "slug": "iit-jee-position-vectors"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-integral-limit/", "id": "pnwrNnZGVEw", "title": "IIT JEE integral limit", "kind": "Video", "description": "2010 IIT JEE Paper 1 #34 Integral Limit", "slug": "iit-jee-integral-limit"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-algebraic-manipulation/", "id": "zs5LM7dxyTo", "title": "IIT JEE algebraic manipulation", "kind": "Video", "description": "2010 Paper 1 problem 35 Algebraic Manipulation", "slug": "iit-jee-algebraic-manipulation"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-function-maxima/", "id": "2E_DB5VuAoo", "title": "IIT JEE function maxima", "kind": "Video", "description": "2010 IIT JEE Paper 1 problem 36 Function Maxima", "slug": "iit-jee-function-maxima"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-diameter-slope/", "id": "pdXcf5ZWHf0", "title": "IIT JEE diameter slope", "kind": "Video", "description": "2010 IIT JEE Paper 1 problem 37 Diameter Slope", "slug": "iit-jee-diameter-slope"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-hairy-trig-and-algebra-part-1/", "id": "dOxXl_6BDQc", "title": "IIT JEE hairy trig and algebra (part 1)", "kind": "Video", "description": "2010 Paper 1 problem 38 Hairy Trig and Algebra", "slug": "iit-jee-hairy-trig-and-algebra-part-1"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-hairy-trig-and-algebra-part-2/", "id": "6t9ogglXNIM", "title": "IIT JEE hairy trig and algebra (part 2)", "kind": "Video", "description": "2010 IIT JEE Paper 1 #38 Hairy Trig and Algebra (Part 2)", "slug": "iit-jee-hairy-trig-and-algebra-part-2"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-hairy-trig-and-algebra-part-3/", "id": "KVRpXvrsSKM", "title": "IIT JEE hairy trig and algebra (part 3)", "kind": "Video", "description": "2010 IIT JEE Paper 1 #38 Hairy Trig and Algebra (Part 3)", "slug": "iit-jee-hairy-trig-and-algebra-part-3"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-complex-numbers-part-1/", "id": "_5ei_I02huY", "title": "IIT JEE complex numbers (part 1)", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 1)", "slug": "iit-jee-complex-numbers-part-1"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-complex-numbers-part-2/", "id": "pQwoBOpVoWw", "title": "IIT JEE complex numbers (part 2)", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 2)", "slug": "iit-jee-complex-numbers-part-2"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-complex-numbers-part-3/", "id": "FwA_UZkI-JM", "title": "IIT JEE complex numbers (part 3)", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 3)", "slug": "iit-jee-complex-numbers-part-3"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-differentiability-and-boundedness/", "id": "FIt1RNiCO6U", "title": "IIT JEE differentiability and boundedness", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 40 Differentiability and Boundedness", "slug": "iit-jee-differentiability-and-boundedness"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-integral-with-binomial-expansion/", "id": "1-5sTDLrcp4", "title": "IIT JEE integral with binomial expansion", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 41 Integral with Binomial Expansion and Algebraic Long Division", "slug": "iit-jee-integral-with-binomial-expansion"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-symmetric-and-skew-symmetric-matrices/", "id": "G6OoxGmJzuc", "title": "IIT JEE symmetric and skew-symmetric matrices", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 42 Symmetric and Skew-Symmetric Matrices", "slug": "iit-jee-symmetric-and-skew-symmetric-matrices"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-trace-and-determinant/", "id": "5S03uylNn-Q", "title": "IIT JEE trace and determinant", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 43 Trace and Determinant", "slug": "iit-jee-trace-and-determinant"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-divisible-determinants/", "id": "9vlsBN3pFE0", "title": "IIT JEE divisible determinants", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 44 Divisible Determinants 2", "slug": "iit-jee-divisible-determinants"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-circle-hyperbola-intersection/", "id": "6g3DPg2HqGw", "title": "IIT JEE circle hyperbola intersection", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 46 Circle Hyperbola Intersection", "slug": "iit-jee-circle-hyperbola-intersection"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-circle-hyperbola-common-tangent-part-1/", "id": "MhLfun2Vask", "title": "IIT JEE circle hyperbola common tangent part 1", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tan", "slug": "iit-jee-circle-hyperbola-common-tangent-part-1"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-circle-hyperbola-common-tangent-part-2/", "id": "0imeUgSxR10", "title": "IIT JEE circle hyperbola common tangent part 2", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 2", "slug": "iit-jee-circle-hyperbola-common-tangent-part-2"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-circle-hyperbola-common-tangent-part-3/", "id": "RomnHMWSLoE", "title": "IIT JEE circle hyperbola common tangent part 3", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 3", "slug": "iit-jee-circle-hyperbola-common-tangent-part-3"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-circle-hyperbola-common-tangent-part-4/", "id": "eGo8C2Jshzs", "title": "IIT JEE circle hyperbola common tangent part 4", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 4", "slug": "iit-jee-circle-hyperbola-common-tangent-part-4"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-circle-hyperbola-common-tangent-part-5/", "id": "rPoqpQcgNv4", "title": "IIT JEE circle hyperbola common tangent part 5", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 45 Circle Hyperbola Common Tangent Part 5", "slug": "iit-jee-circle-hyperbola-common-tangent-part-5"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-trigonometric-constraints/", "id": "EjtjdJZ2x8w", "title": "IIT JEE trigonometric constraints", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 47 Trigonometric Constraints", "slug": "iit-jee-trigonometric-constraints"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-trigonometric-maximum/", "id": "tzR9jUCSniQ", "title": "IIT JEE trigonometric maximum", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 48 Trigonometric Maximum", "slug": "iit-jee-trigonometric-maximum"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/vector-triple-product-expansion-very-optional/", "id": "b7JTVLc_aMk", "title": "Vector triple product expansion (very optional)", "kind": "Video", "description": "A shortcut for having to evaluate the cross product of three vectors", "slug": "vector-triple-product-expansion-very-optional"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/iit-jee-lagrange-s-formula/", "id": "rndex9FCIdo", "title": "IIT JEE lagrange's formula", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 49 Lagrange's Formula", "slug": "iit-jee-lagrange-s-formula"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/tangent-line-hyperbola-relationship-very-optional/", "id": "c_8QQbVQKU0", "title": "Tangent line hyperbola relationship (very optional)", "kind": "Video", "description": "How a tangent line relates to a hyperbola. Might be useful for some competitive exams where there isn't time to derive (like we are doing in this video)", "slug": "tangent-line-hyperbola-relationship-very-optional"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/2010-iit-jee-paper-1-problem-50-hyperbola-eccentricity/", "id": "4ES_vbSJ7LU", "title": "2010 IIT JEE Paper 1 Problem 50: Hyperbola eccentricity", "kind": "Video", "slug": "2010-iit-jee-paper-1-problem-50-hyperbola-eccentricity"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/normal-vector-from-plane-equation/", "id": "gw-4wltP5tY", "title": "Normal vector from plane equation", "kind": "Video", "description": "Figuring out a normal vector to a plane from its equation", "slug": "normal-vector-from-plane-equation"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/point-distance-to-plane/", "id": "7rIFO8hct9g", "title": "Point distance to plane", "kind": "Video", "description": "Distance between a point and a plane in three dimensions", "slug": "point-distance-to-plane"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/distance-between-planes/", "id": "v8plb6V8BQo", "title": "Distance between planes", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 51 Distance Between Planes", "slug": "distance-between-planes"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/complex-determinant-example/", "id": "E7OkUomRq1Q", "title": "Complex determinant example", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 53 Complex Determinant", "slug": "complex-determinant-example"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/series-sum-example/", "id": "A6fbDssPeac", "title": "Series sum example", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 54 Series Sum", "slug": "series-sum-example"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/trigonometric-system-example/", "id": "Y2ed-g8Lpdc", "title": "Trigonometric system example", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 55 Trigonometric System", "slug": "trigonometric-system-example"}, {"path": "khan/test-prep/iit-jee-subject/iit-jee/simple-differential-equation-example/", "id": "fqnPabGV6A4", "title": "Simple differential equation example", "kind": "Video", "description": "2010 IIT JEE Paper 1 Problem 56 Differential Equation", "slug": "simple-differential-equation-example"}], "in_knowledge_map": false, "description": "Questions from previous IIT JEEs", "node_slug": "iit-jee", "render_type": "Tutorial", "topic_page_url": "/test-prep/iit-jee-subject/iit-jee", "extended_slug": "test-prep/iit-jee-subject/iit-jee", "kind": "Topic", "slug": "iit-jee"}], "in_knowledge_map": false, "description": "", "node_slug": "iit-jee-subject", "render_type": "Subject", "topic_page_url": "/test-prep/iit-jee-subject", "extended_slug": "test-prep/iit-jee-subject", "kind": "Topic", "slug": "iit-jee-subject"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/ap-art-history/", "id": "ap-art-history", "hide": false, "title": "AP* Art History", "child_data": [{"kind": "Topic", "id": "x326aca69"}, {"kind": "Topic", "id": "xa07f1ce5"}, {"kind": "Topic", "id": "x57bf6074"}, {"kind": "Topic", "id": "xaf3fc449"}, {"kind": "Topic", "id": "xf96163db"}, {"kind": "Topic", "id": "xa4f55a39"}, {"kind": "Topic", "id": "x877a389d"}, {"kind": "Topic", "id": "x1c4e7cdf"}, {"kind": "Topic", "id": "xd45acdc9"}, {"kind": "Topic", "id": "x4fb0aef8"}, {"kind": "Topic", "id": "xbcc679f6"}, {"kind": "Topic", "id": "x764ca8f2"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/introduction-ap-arthistory/", "id": "introduction-ap-arthistory", "hide": false, "title": "Start here", "child_data": [{"kind": "Article", "id": "x791f0d31"}, {"kind": "Video", "id": "1043985977"}, {"kind": "Article", "id": "1314851510"}, {"kind": "Article", "id": "xf979ae27"}, {"kind": "Video", "id": "x33974b7c"}, {"kind": "Video", "id": "x60e40401"}, {"kind": "Video", "id": "x8684dedb"}, {"kind": "Video", "id": "xcabfc38e"}, {"kind": "Article", "id": "x1642dfaf"}], "children": [{"path": "khan/test-prep/ap-art-history/introduction-ap-arthistory/why-look-at-art/", "id": "0OloYD_kSbU", "title": "Why look at art?", "kind": "Video", "description": "Why look at art? This was the question we posed to several of our colleagues at a conference for museum professionals. Special thanks to Laura Mann, Anna Velez, an anonymous professional, and David Torgersen whose voices and insights are included here.", "slug": "why-look-at-art"}, {"path": "khan/test-prep/ap-art-history/introduction-ap-arthistory/goya-third-may/", "id": "_QM-DfhrNv8", "title": "Art historical analysis (painting), a basic introduction using Goya's Third of May, 1808", "kind": "Video", "description": "Francisco de Goya, Third of May, 1808, 1814, oil on canvas, 266 x 345.1 cm (Museo del Prado. Madrid)", "slug": "goya-third-may"}, {"path": "khan/test-prep/ap-art-history/introduction-ap-arthistory/a-brief-history-of-religion-in-art-ted-ed/", "id": "qfITRYcnP84", "title": "A brief history of religion in art", "kind": "Video", "description": "Before we began putting art into museums, art mostly served as the visual counterpart to religious stories. Are these theological paintings, sculptures, textiles and illuminations from centuries ago still relevant to us? Jeremiah Dickey describes the evolution of art in the public eye and explains how the modern viewer can see the history of art as an ongoing global conversation.", "slug": "a-brief-history-of-religion-in-art-ted-ed"}, {"path": "khan/test-prep/ap-art-history/introduction-ap-arthistory/is-there-a-difference-between-art-and-craft-laura-morelli/", "id": "tVdw60eCnJI", "title": "Is there a difference between art and craft?", "kind": "Video", "description": "Was da Vinci an artistic genius? Sure, but he was also born in the right place at the right time -- pre-Renaissance, Western artists got little individual credit for their work. And in many non-Western cultures, traditional forms have always been prized over innovation. So, where do we get our notions of art vs. craft? Laura Morelli traces the history of how we assign value to the visual arts. Lesson by Laura Morelli, animation by Sandro Katamashvili.", "slug": "is-there-a-difference-between-art-and-craft-laura-morelli"}, {"path": "khan/test-prep/ap-art-history/introduction-ap-arthistory/how-art-can-help-you-analyze-amy-e-herman/", "id": "ubEadhXWwV4", "title": "How art can help you analyze", "kind": "Video", "description": "Can art save lives? Not exactly, but our most prized professionals (doctors, nurses, police officers) can learn real world skills through art analysis. Studying art like Ren\u00e9 Magritte's Time Transfixed can enhance communication and analytical skills, with an emphasis on both the seen and unseen. Amy E. Herman explains why art historical training can prepare you for real world investigation. Lesson by Amy E. Herman, animation by Flaming Medusa Studios Inc.", "slug": "how-art-can-help-you-analyze-amy-e-herman"}], "in_knowledge_map": false, "description": "Here's where you'll find a list of resources for all 250 AP objects in one place. Also some helpful material about dates and maps and how to look at art.", "node_slug": "introduction-ap-arthistory", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/introduction-ap-arthistory", "extended_slug": "test-prep/ap-art-history/introduction-ap-arthistory", "kind": "Topic", "slug": "introduction-ap-arthistory"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/cultures-religions-ap-arthistory/", "id": "cultures-religions-ap-arthistory", "hide": false, "title": "Introduction to cultures and religions for the study of AP Art History", "child_data": [{"kind": "Article", "id": "1314267931"}, {"kind": "Article", "id": "x3764d4d5"}, {"kind": "Article", "id": "x4529b322"}, {"kind": "Article", "id": "xeb0b8eb6"}, {"kind": "Article", "id": "x5d9c24e4"}, {"kind": "Video", "id": "x777743f6"}, {"kind": "Article", "id": "x0db8606f"}, {"kind": "Article", "id": "1330586045"}, {"kind": "Video", "id": "x64539d32"}, {"kind": "Article", "id": "x3a5c3e8a"}, {"kind": "Article", "id": "x11ccc801"}, {"kind": "Article", "id": "x9056efc9"}, {"kind": "Article", "id": "xb77dee43"}, {"kind": "Article", "id": "x7f25971c"}, {"kind": "Video", "id": "xaf6ef088"}], "children": [{"path": "khan/test-prep/ap-art-history/cultures-religions-ap-arthistory/beliefs-made-visible-i/", "id": "IX85uiG86RA", "title": "Beliefs made visible: Hindu art in South Asia", "kind": "Video", "description": "Explore Hinduism through clips of significant sites in South Asia and interviews with members of the Bay Area South Asian community. Learn more about Hinduism on the Asian Art Museum's education website.", "slug": "beliefs-made-visible-i"}, {"path": "khan/test-prep/ap-art-history/cultures-religions-ap-arthistory/beliefs-made-visible-ii/", "id": "jl6S0wdeWk4", "title": "Beliefs made visible: Buddhist art in South Asia", "kind": "Video", "description": "Explore Buddhism through clips of significant sites in South Asia and interviews with members of the Bay Area South Asian community. Learn more about Buddhism on the Asian Art Museum's education website.", "slug": "beliefs-made-visible-ii"}, {"path": "khan/test-prep/ap-art-history/cultures-religions-ap-arthistory/modern-pilgrimage-stories/", "id": "r5l5Cwge7yk", "title": "Stories of the modern pilgrimage", "kind": "Video", "description": "Every year, 25,000 British Muslims make the pilgrimage to Mecca. As part of the exhibition, Hajj: journey to the heart of Islam, the British Museum asked what this journey is like... \u00a9Trustees of the British Museum. More Hajj stories from the Asian Art Museum", "slug": "modern-pilgrimage-stories"}], "in_knowledge_map": false, "description": "An introduction to Judaism, Hinduism, Christianity, Buddhism, and Islam", "node_slug": "cultures-religions-ap-arthistory", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/cultures-religions-ap-arthistory", "extended_slug": "test-prep/ap-art-history/cultures-religions-ap-arthistory", "kind": "Topic", "slug": "cultures-religions-ap-arthistory"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/ap-art-history/global-prehistory-ap/", "id": "global-prehistory-ap", "hide": false, "title": "Global prehistory: 30,000-500 B.C.E.", "child_data": [{"kind": "Topic", "id": "x2e92ecdb"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/global-prehistory-ap/paleolithic-mesolithic-neolithic/", "id": "paleolithic-mesolithic-neolithic", "hide": false, "title": "Paleolithic, Mesolithic and Neolithic", "child_data": [{"kind": "Article", "id": "x3fa7293a"}, {"kind": "Article", "id": "x2619bcb6"}, {"kind": "Article", "id": "xc130048e"}, {"kind": "Article", "id": "x178f631a"}, {"kind": "Article", "id": "x0d194220"}, {"kind": "Article", "id": "x93de4621"}, {"kind": "Article", "id": "x4915d874"}, {"kind": "Article", "id": "xe7f5ca0a"}, {"kind": "Video", "id": "xc5cb3173"}, {"kind": "Video", "id": "x18c3d480"}, {"kind": "Video", "id": "x01531b07"}, {"kind": "Article", "id": "x654c7a36"}, {"kind": "Video", "id": "xe9345924"}, {"kind": "Video", "id": "x470cce5d"}, {"kind": "Article", "id": "x9d4921f7"}], "children": [{"path": "khan/test-prep/ap-art-history/global-prehistory-ap/paleolithic-mesolithic-neolithic/susa-ibex/", "id": "eeNfDr4ojZg", "title": "Bushel with ibex motifs", "kind": "Video", "description": "Bushel with ibex motifs, 4200--3500 B.C.E., Susa I period, necropolis, acropolis mound, Susa, Iran, painted terra-cotta, 28.90 x 16.40 cm, excavations led by Jacques de Morgan, 1906-08 (Mus\u00e9e du Louvre, Paris)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "susa-ibex"}, {"path": "khan/test-prep/ap-art-history/global-prehistory-ap/paleolithic-mesolithic-neolithic/jade-cong/", "id": "ld8kHvz1yN4", "title": "Jade Cong", "kind": "Video", "description": "Jade Cong, c. 2500 B.C.E., Liangzhu culture, Neolithic period, China (British Museum)\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "jade-cong"}, {"path": "khan/test-prep/ap-art-history/global-prehistory-ap/paleolithic-mesolithic-neolithic/working-jade/", "id": "d1oO1kbtt4s", "title": "Working jade", "kind": "Video", "description": "This video explores the significance and working of jade in China. Learn more about jade on the Asian Art Museum's education website.", "slug": "working-jade"}, {"path": "khan/test-prep/ap-art-history/global-prehistory-ap/paleolithic-mesolithic-neolithic/stonehenge-unesconhk/", "id": "h0J_RnRILJ0", "title": "Stonehenge, Avebury and Associated Sites (UNESCO/NHK)", "kind": "Video", "description": "Stonehenge and Avebury, in Wiltshire, are among the most famous groups of megaliths in the world. The two sanctuaries consist of circles of menhirs arranged in a pattern whose astronomical significance is still being explored. These holy places and the nearby Neolithic sites are an incomparable testimony to prehistoric times. Source: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai URL: http://whc.unesco.org/en/list/373/", "slug": "stonehenge-unesconhk"}, {"path": "khan/test-prep/ap-art-history/global-prehistory-ap/paleolithic-mesolithic-neolithic/tlatilco-figurines/", "id": "Q3DpCMAyWyw", "title": "Tlatilco figurines", "kind": "Video", "description": "Tlatilco figurines (from the National Museum of Anthropology, but also including the Female Figure at the Princeton University Art Museum), ceramic, Tlatilco, Mesoamerica (present-day Mexico), c. 1200\u2013600 B.C.E. \u00a0Speakers: Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker.\n\nTlatilco is a Nahuatl word, given to this \u201cculture\u201d later. It means \u201cplace of hidden things.\u201d We don\u2019t know what the people here called themselves. Around 2000 B.C.E., maize, squash and other crops were domesticated, which allowed people to settle in villages. The settlement of Tlatilco was located close to a lake, and fishing and the hunting of birds became important food sources.\n\nArchaeologists have found more than 340 burials at Tlatilco, with many more destroyed in the first half of the 20th century.", "slug": "tlatilco-figurines"}], "in_knowledge_map": false, "description": "Periods of time before the written record are often defined in terms of geological eras or major shifts in climate and environment. The periods of global prehistory, known as lithic or stone ages, are Paleolithic (\u201cold stone age\u201d), Mesolithic (\u201cmiddle stone age\u201d), and Neolithic (\u201cnew stone age\u201d). A glacial period produced European ice ages; Saharan agricultural grassland became desert; and tectonic shifts in southeast Asia created land bridges between the continent and the now-islands of the Pacific south of the equator. Human behavior and expression was influenced by the changing environments in which they lived.\n\nBy permission, \u00a9 2013 The College Board", "node_slug": "paleolithic-mesolithic-neolithic", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/global-prehistory-ap/paleolithic-mesolithic-neolithic", "extended_slug": "test-prep/ap-art-history/global-prehistory-ap/paleolithic-mesolithic-neolithic", "kind": "Topic", "slug": "paleolithic-mesolithic-neolithic"}], "in_knowledge_map": false, "description": "Human expression existed across the globe before the written record. While prehistoric art of Europe has been the focus of many introductions to the history of art, very early art is found worldwide and shares certain features, particularly concern with the natural world and humans\u2019 place within it.\n\nBy permission, \u00a9 2013 The College Board", "node_slug": "global-prehistory-ap", "render_type": "Topic", "topic_page_url": "/test-prep/ap-art-history/global-prehistory-ap", "extended_slug": "test-prep/ap-art-history/global-prehistory-ap", "kind": "Topic", "slug": "global-prehistory-ap"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/", "id": "ancient-mediterranean-AP", "hide": false, "title": "Ancient Mediterranean: 3500 B.C.E.-300 C.E.", "child_data": [{"kind": "Topic", "id": "xba2bbee3"}, {"kind": "Topic", "id": "x866caebe"}, {"kind": "Topic", "id": "x6f6edb84"}, {"kind": "Topic", "id": "x2fbf8a5a"}, {"kind": "Topic", "id": "x26909f88"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-near-east-a/", "id": "ancient-near-east-a", "hide": false, "title": "Ancient Near East", "child_data": [{"kind": "Article", "id": "1309935460"}, {"kind": "Article", "id": "x018da978"}, {"kind": "Video", "id": "x78ed8a4b"}, {"kind": "Video", "id": "820630129"}, {"kind": "Article", "id": "xc1f9428c"}, {"kind": "Article", "id": "x398e7b17"}, {"kind": "Video", "id": "671260980"}, {"kind": "Video", "id": "xe58aac02"}, {"kind": "Article", "id": "xe2484df4"}, {"kind": "Video", "id": "xe610702a"}, {"kind": "Article", "id": "xa39f6755"}], "children": [{"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-near-east-a/standing-male-worshipper/", "id": "DKMWS9qJ_1U", "title": "Standing Male Worshipper from Tell Asmar", "kind": "Video", "description": "Standing Male Worshipper (votive figure), c. 2900-2600 B.C.E., from the Square Temple at Eshnunna (modern Tell Asmar, Iraq), Sumerian, Early Dynastic I-II, gypsum alabaster, shell, black limestone, bitumen, 11 5/8 x 5 1/8 x 3 7/8 inches / 29.5 x 10 cm (The Metropolitan Museum of Art). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "standing-male-worshipper"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-near-east-a/standard-of-ur-c-2600-2400-b-c-e/", "id": "Nok4cBt0V6w", "title": "Standard of Ur from the Royal Tombs at Ur", "kind": "Video", "description": "Standard of Ur, c. 2600-2400 B.C.E., 21.59 x 49.5 x 12 cm (British Museum) Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "standard-of-ur-c-2600-2400-b-c-e"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-near-east-a/law-code-stele-of-king-hammurabi-792-1750-b-c-e/", "id": "_w5NGOHbgTw", "title": "Law code of Hammurabi", "kind": "Video", "description": "Law Code Stele of King Hammurabi, basalt, Babylonian, 1792-1750 B.C.E. (Mus\u00e9e du Louvre, Paris) A stele is a vertical stone monument or marker often inscribed with text or with relief carving. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "law-code-stele-of-king-hammurabi-792-1750-b-c-e"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-near-east-a/lamassu/", "id": "2GrvBLKaRSI", "title": "Lamassu from the citadel of Sargon II", "kind": "Video", "description": "Lamassu (winged human-headed bulls possibly lamassu or shedu) from the citadel of Sargon II, Dur Sharrukin (now Khorsabad, Iraq), Neo-Assyrian, c. 720-705 B.C.E., gypseous alabaster, 4.20 x 4.36 x 0.97 m, excavated by P.-E. Botta 1843-44 (Mus\u00e9e du Louvre)\u00a0Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nIN THE NEWS: Irreplaceable Lamassu sculpture, Assyrian\u00a0architecture and whole archaeological sites have recently been destroyed by militants that control large areas of\u00a0Iraq and Syria. This tragedy cannot be undone and is an attack on our shared\u00a0history and cultural heritage. To learn more: February 27, 2015 New York Times article", "slug": "lamassu"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-near-east-a/bull-capital-susa/", "id": "mjxCTApdX3Q", "title": "Capital of a column from the audience hall of the palace of Darius I, Susa", "kind": "Video", "description": "Capital of a column from the audience hall of the palace of Darius I, Susa, c. 510 B.C.E., \u00a0Achaemenid, \u00a0Tell of the Apadana, Susa, Iran (Louvre)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "bull-capital-susa"}], "in_knowledge_map": false, "description": "Religion plays a significant role in the art and architecture of the ancient Near East, with cosmology guiding representation of deities and kings who themselves assume divine attributes.\n\nBy permission, \u00a9 2013 The College Board", "node_slug": "ancient-near-east-a", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/ancient-mediterranean-AP/ancient-near-east-a", "extended_slug": "test-prep/ap-art-history/ancient-mediterranean-AP/ancient-near-east-a", "kind": "Topic", "slug": "ancient-near-east-a"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-egypt-ap/", "id": "ancient-egypt-ap", "hide": false, "title": "Ancient Egypt", "child_data": [{"kind": "Article", "id": "1315008662"}, {"kind": "Article", "id": "xa9870f52"}, {"kind": "Article", "id": "xde82521a"}, {"kind": "Video", "id": "671563196"}, {"kind": "Article", "id": "x9706e999"}, {"kind": "Article", "id": "xfc56f636"}, {"kind": "Article", "id": "xb1878887"}, {"kind": "Article", "id": "x7bf2d89a"}, {"kind": "Article", "id": "x62f7a62c"}, {"kind": "Article", "id": "x815306bf"}, {"kind": "Video", "id": "xabdfbde8"}, {"kind": "Video", "id": "xa26fbccd"}, {"kind": "Video", "id": "952857531"}, {"kind": "Article", "id": "xc8c71e82"}, {"kind": "Video", "id": "x9992358e"}, {"kind": "Article", "id": "xb4d6d345"}], "children": [{"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-egypt-ap/the-seated-scribe-c-2620-2500-b-c-e/", "id": "cxs1d3N60UI", "title": "Old Kingdom: Seated Scribe", "kind": "Video", "description": "The Seated Scribe\u200b, c. 2620-2500 B.C.E., c. 4th Dynasty, Old Kingdom, painted limestone with rock crystal, magnesite, and copper/arsenic inlay for the eyes and wood for the nipples, found in Saqqara (Mus\u00e9e du Louvre, Paris). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "the-seated-scribe-c-2620-2500-b-c-e"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-egypt-ap/mortuary-temple-of-hatshepsut-and-large-kneeling-statue-new-kingdom-egypt/", "id": "pZOUV_rTyj0", "title": "Mortuary Temple of Hatshepsut and Large Kneeling Statue, New Kingdom, Egypt", "kind": "Video", "description": "Mortuary Temple and Large Kneeling Statue of Hatshepsut, c. 1479-58 B.C.E., New Kingdom, Egypt. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "mortuary-temple-of-hatshepsut-and-large-kneeling-statue-new-kingdom-egypt"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-egypt-ap/ancient-thebes-unescotbs/", "id": "KV0hmkuS5ec", "title": "Ancient Thebes with its Necropolis (UNESCO/TBS)", "kind": "Video", "description": "Thebes, the city of the god Amon, was the capital of Egypt during the period of the Middle and New Kingdoms. With the temples and palaces at Karnak and Luxor, and the necropolises of the Valley of the Kings and the Valley of the Queens, Thebes is a striking testimony to Egyptian civilization at its height.", "slug": "ancient-thebes-unescotbs"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-egypt-ap/house-altar-depicting-akhenaten-nefertiti-and-three-daughters/", "id": "ryycDVWXDvc", "title": "Akhenaten, Nefertiti, and Three Daughters", "kind": "Video", "description": "House Altar depicting Akhenaten, Nefertiti and Three of their Daughters, limestone, New Kingdom, Amarna period, 18th dynasty, c.1350 BCE (\u00c4gyptisches Museum/Neues Museum, Staatliche Museen zu Berlin)", "slug": "house-altar-depicting-akhenaten-nefertiti-and-three-daughters"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ancient-egypt-ap/judgement-in-the-presence-of-osiris-hunefer-s-book-of-the-dead/", "id": "WceVwMdN0eE", "title": "Last Judgement of Hunefer, from his tomb", "kind": "Video", "description": "Hunefer's Judgement in the presence of Osiris, Book of the Dead, 19th Dynasty, New Kingdom, c. 1275 B.C.E., papyrus, Thebes, Egypt (British Museum).", "slug": "judgement-in-the-presence-of-osiris-hunefer-s-book-of-the-dead"}], "in_knowledge_map": false, "description": "The art of dynastic Egypt embodies a sense of permanence. It was created for eternity in the service of a culture that focused on preserving a cycle of rebirth.\n\nBy permission, \u00a9 2013 The College Board", "node_slug": "ancient-egypt-ap", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/ancient-mediterranean-AP/ancient-egypt-ap", "extended_slug": "test-prep/ap-art-history/ancient-mediterranean-AP/ancient-egypt-ap", "kind": "Topic", "slug": "ancient-egypt-ap"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/", "id": "greece-etruria-rome", "hide": false, "title": "Ancient Greece", "child_data": [{"kind": "Video", "id": "x7375afe4"}, {"kind": "Video", "id": "xa917e560"}, {"kind": "Video", "id": "x27e4a84a"}, {"kind": "Video", "id": "x3ab0b12d"}, {"kind": "Video", "id": "x5fe9ca9d"}, {"kind": "Video", "id": "x071426f8"}, {"kind": "Video", "id": "988889228"}, {"kind": "Article", "id": "x3beb371c"}, {"kind": "Video", "id": "x6d14ffc4"}, {"kind": "Article", "id": "x58a38711"}, {"kind": "Video", "id": "671422819"}, {"kind": "Video", "id": "671563199"}, {"kind": "Video", "id": "xfb1c4b07"}, {"kind": "Video", "id": "x6f8830f4"}, {"kind": "Video", "id": "x048af0e0"}, {"kind": "Video", "id": "671563200"}, {"kind": "Video", "id": "719474979"}, {"kind": "Video", "id": "1165113617"}, {"kind": "Video", "id": "988721865"}], "children": [{"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/the-classical-orders/", "id": "nrRJkzXl4a4", "title": "The classical orders", "kind": "Video", "description": "A conversation with Dr. Steven Zucker & Dr. Beth Harris\n\nIn classical architecture, the Orders consist of variations of an assembly of parts made up of a column (usually with a base), a capital, and an entablature. These structural units may be repeated and combined to form the elevation of a building and its architectural vocabulary.\n\nThere are eight Orders in total: Doric (Greek and Roman versions), Tuscan, Ionic (Greek and Roman), Corinthian (Greek and Roman), and Composite. The simplest is the Tuscan, supposedly derived from the Etruscan-type temple. It has a base and capital and a plain column. The Doric is probably earlier, however, its Greek version having no base, as on the Parthenon. The Ionic Order, with its twin volute capitals, originated in Asia Minor in the mid-6th century B.C.E. The Corinthian Order was an Athenian invention of the 5th century B.C.E. and was later developed by the Romans. The Composite Order is a late Roman combination of elements from the Ionic and Corinthian Orders.\n\nThe Concise Oxford Dictionary of Art Terms, Michael Clarke, Deborah Clarke. \u00a9 2012 Oxford University Press. Available at Oxford Art OnlineAncient Greece", "slug": "the-classical-orders"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/athenian-agora/", "id": "TYXCcTchLnI", "title": "The Athenian Agora and the experiment in democracy", "kind": "Video", "description": "Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "athenian-agora"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/anavysos-kouros/", "id": "v1_pCZBVWuY", "title": "Anavysos Kouros", "kind": "Video", "description": "Anavysos Kouros, c. 530 B.C.E., marble, 6' 4\" (National Archaeological Museum, Athens)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "anavysos-kouros"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/peplos-kore/", "id": "RjpT4Apgda8", "title": "Peplos Kore from the Acropolis", "kind": "Video", "description": "Peplos Kore, c. 530 B.C.E., from the Acropolis, Athens, Greece (Acropolis Museum, Athens)\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "peplos-kore"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/making-greek-vases/", "id": "WhPW50r07L8", "title": "Making Greek vases", "kind": "Video", "description": "In ancient Greece, the phrase \"to make pottery\" meant to work hard.\u00a0This video from the Getty Museum reveals how the typical Athenian potter prepared clay, threw vases, oversaw firing, and added decoration or employed vase-painters. Love art? Follow us on Google+", "slug": "making-greek-vases"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/niobid-krater/", "id": "S3TlDyT2lyg", "title": "Attic Red-Figure: Niobid Painter, \"Niobid Krater\"", "kind": "Video", "description": "Niobid Painter, \"Niobid Krater,\" Attic red-figure calyx-krater, c. 460-50 B.C.E., 54 x 56 cm\u00a0(Mus\u00e9e du Louvre)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "niobid-krater"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/polykleitos-doryphoros-spear-bearer/", "id": "EAR9RAMg9NY", "title": "Polykleitos, Doryphoros (Spear Bearer)", "kind": "Video", "description": "Polykleitos, Doryphoros (Spear-Bearer), Early Classical Period, Roman marble copy after a Greek bronze original from c. 450-440 B.C.E. (Museo Archaeologico Nazionale, Naples). Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "polykleitos-doryphoros-spear-bearer"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/parthenon/", "id": "tWDflkBZC6U", "title": "Parthenon (Acropolis)", "kind": "Video", "description": "Iktinos and Kallikrates (Phidias directed the sculptural program), Parthenon, Athens, 447 - 432 B.C.E.\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "parthenon"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/phidias-sculpture-from-the-east-pediment-of-the-parthenon-c-448-432-b-c-e/", "id": "Ip6hmC2KIug", "title": "East Pediment sculptures, Parthenon, including Helios, Horses and Dionysus (Heracles?)", "kind": "Video", "description": "Phidias (?), Sculpture from the East Pediment of the Parthenon, marble, c. 448-432 B.C.E., Classical Period (British Museum, London). Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "phidias-sculpture-from-the-east-pediment-of-the-parthenon-c-448-432-b-c-e"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/phidias-parthenon-frieze-c-438-32-b-c-e/", "id": "KzZF1lP4Rbk", "title": "Parthenon frieze", "kind": "Video", "description": "Phidias(?), Parthenon Frieze, c. 438-32 B.C.E., pentelic marble, Classical Period (420 linear feet of the 525 that complete the frieze are in the British Museum). \n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "phidias-parthenon-frieze-c-438-32-b-c-e"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/parthenon-ergastines/", "id": "zU9qSQi1E68", "title": "\"Plaque of the Ergastines\" fragment from the frieze on the east side of the Parthenon", "kind": "Video", "description": "Phidias (?), \"Plaque of the Ergastines,\" 445 - 438 B.C.E., Pentelic marble (Attica), 0.96 x 2.07 m, fragment from the frieze on the east side of the Parthenon (Mus\u00e9e du Louvre, Paris)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "parthenon-ergastines"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/sandal-nike/", "id": "B4HXrb8cPQI", "title": "Victory (Nike) Adjusting Her Sandal, Temple of Athena Nike (Acropolis)", "kind": "Video", "description": "Nike Adjusting Her Sandal, from the south side of the parapet of the Temple of Athena Nike, Acropolis, Athens, Greece, c. 410 B.C.E., marble, 3' 6\" high (Acropolis Museum, Athens)\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "sandal-nike"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/hegeso-stele/", "id": "YUzsxLi43gE", "title": "Grave Stele of Hegeso", "kind": "Video", "description": "Grave stele of Hegeso, c. 410 B.C.E., marble and paint, from the Dipylon Cemetary, Athens, 5' 2\" (National Archaeological Museum, Athens)\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "hegeso-stele"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/nike-winged-victory-of-samothrace-c-190-b-c-e/", "id": "TPM1LuW3Y5w", "title": "Winged Victory (Nike) of Samothrace", "kind": "Video", "description": "Nike (Winged Victory) of Samothrace, Lartos marble (ship) and Parian marble (figure), c. 190 B.C.E. 3.28m high, Hellenistic Period (Mus\u00e9e du Louvre, Paris). The sculpture was unearthed in 1863 after its discovery under the direction of Charles Champoiseau\u200b, the French Vice-Consul to Turkey. Please note that the theoretical reconstruction of the Nike as a trumpeter mentioned in the video has been largely abandoned; the monument is now thought to have been part of a fountain possibly commemorating a naval victory. Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "nike-winged-victory-of-samothrace-c-190-b-c-e"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/the-pergamon-altar-c-200-150-b-c-e/", "id": "L3SIooVHV8E", "title": "Great Altar of Zeus and Athena at Pergamon", "kind": "Video", "description": "The Pergamon Altar, c. 200-150 B.C.E., 35.64 x 33.4 meters, Hellenistic Period (Pergamon Museum, Berlin). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "the-pergamon-altar-c-200-150-b-c-e"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/alexander-mosaic-c-100-b-c-e/", "id": "51UA1T89MzU", "title": "Alexander Mosaic from the House of the Faun, Pompeii", "kind": "Video", "description": "Alexander Mosaic, c. 100 B.C.E., Roman copy (Pompeii) of a lost Greek painting, c. 315 B.C.E., Hellenistic Period (Archaeological Museum, Naples). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "alexander-mosaic-c-100-b-c-e"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/greece-etruria-rome/apollonius-boxer-at-rest-c-100-b-c-e/", "id": "FvsSPJoJB3k", "title": "Apollonius, Seated Boxer", "kind": "Video", "description": "Apollonius, Boxer at Rest, c. 100 B.C.E., bronze, Hellenistic Period (Palazzo Massimo, Museo Nazionale Romano, Rome). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "apollonius-boxer-at-rest-c-100-b-c-e"}], "in_knowledge_map": false, "description": "The art of Ancient Greece and Rome is grounded in civic ideals and polytheism. Etruscan and Roman artists and architects accumulated and creatively adapted Greek objects and forms to create buildings and artworks that appealed to their tastes for eclecticism and historicism. Contextual information for ancient Greek and Roman art can be derived from contemporary literary, political, legal, and economic records as well as from archaeological excavations conducted from the mid-18th century onward. Etruscan art, by contrast, is illuminated primarily by modern archaeological record and by descriptions of contemporary external observers.\n\nBy permission, \u00a9 2013 The College Board", "node_slug": "greece-etruria-rome", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/ancient-mediterranean-AP/greece-etruria-rome", "extended_slug": "test-prep/ap-art-history/ancient-mediterranean-AP/greece-etruria-rome", "kind": "Topic", "slug": "greece-etruria-rome"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-etruria/", "id": "AP-ancient-etruria", "hide": false, "title": "Ancient Etruria", "child_data": [{"kind": "Article", "id": "x77d56b38"}, {"kind": "Video", "id": "x27119979"}, {"kind": "Article", "id": "xd15f581f"}, {"kind": "Article", "id": "x9b381c3a"}, {"kind": "Video", "id": "xd9ea6e7a"}, {"kind": "Video", "id": "x45a302b4"}, {"kind": "Article", "id": "x0474f941"}], "children": [{"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-etruria/sarcophagus-of-the-spouses-rome/", "id": "XmirNCA_Lj4", "title": "Sarcophagus of the Spouses (Rome)", "kind": "Video", "description": "Sarcophagus of the Spouses (or Sarcophagus with Reclining Couple), from the Banditaccia necropolis, Cerveteri, Italy, c. 520 B.C.E., painted terracotta, 3 feet 9 1/2 inches x 6 feet 7 inches (Museo Nazionale di Villa Giulia, Rome). Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "sarcophagus-of-the-spouses-rome"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-etruria/apollo-of-veil/", "id": "GLgrt_4WnMY", "title": "Apulu (Apollo of Veil)", "kind": "Video", "description": "Apulu (Apollo of Veil), from the roof of the Portonaccio temple, Italy, c. 510-500 B.C.E., painted terracotta, 5 feet, 11 inches high (Museo Nazionale di Villa Giulia, Rome). \u00a0Speakers: Dr Steven Zucker and Dr. Beth Harris", "slug": "apollo-of-veil"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-etruria/etruscan-necropolises-unesconhk/", "id": "YheIckLuV7c", "title": "Etruscan Necropolises of Cerveteri and Tarquinia (from UNESCO/NHK)", "kind": "Video", "description": "These two large Etruscan cemeteries reflect different types of burial practices from the 9th to the 1st century BC, and bear witness to the achievements of Etruscan culture. Which over nine centuries developed the earliest urban civilization in the northern Mediterranean. Some of the tombs are monumental, cut in rock and topped by impressive tumuli (burial mounds). Many feature carvings on their walls, others have wall paintings of\u00a0outstanding quality. The necropolis near Cerveteri, known as Banditaccia, contains thousands of tombs organized in a city-like plan, with streets, small squares and neighbourhoods. The site contains very different types of tombs: trenches cut in rock; tumuli; and some, also carved in rock, in the shape of huts or houses with a wealth of structural details. These provide the only surviving evidence of Etruscan residential architecture. The necropolis of Tarquinia, also known as Monterozzi, contains 6,000 graves cut in the rock. It is famous for its 200 painted tombs, the earliest of which date from the 7th century BC.\nSource: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai (URL)", "slug": "etruscan-necropolises-unesconhk"}], "in_knowledge_map": false, "description": "", "node_slug": "AP-ancient-etruria", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/ancient-mediterranean-AP/AP-ancient-etruria", "extended_slug": "test-prep/ap-art-history/ancient-mediterranean-AP/AP-ancient-etruria", "kind": "Topic", "slug": "ap-ancient-etruria"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/", "id": "ap-ancient-rome", "hide": false, "title": "Ancient Rome", "child_data": [{"kind": "Video", "id": "785318223"}, {"kind": "Video", "id": "1159741561"}, {"kind": "Article", "id": "x57c677d8"}, {"kind": "Video", "id": "1315102373"}, {"kind": "Article", "id": "x0a8e60e4"}, {"kind": "Video", "id": "903658510"}, {"kind": "Article", "id": "x526a4643"}, {"kind": "Video", "id": "671422821"}, {"kind": "Article", "id": "x221ed686"}, {"kind": "Article", "id": "xa57450b8"}, {"kind": "Video", "id": "xf4c8d271"}, {"kind": "Video", "id": "x71f3f592"}, {"kind": "Video", "id": "671397702"}, {"kind": "Video", "id": "671563202"}, {"kind": "Video", "id": "1250456711"}], "children": [{"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/a-tour-through-ancient-rome-in-320-c-e/", "id": "e_phjB19ZEg", "title": "Ancient Rome", "kind": "Video", "description": "A project between Khan Academy and Rome Reborn - with Dr. Bernard Frischer", "slug": "a-tour-through-ancient-rome-in-320-c-e"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/digging-through-time/", "id": "Z1RpVPbHgzU", "title": "Digging through time", "kind": "Video", "description": "A conversation with Dr. Darius Arya and Dr. Beth Harris.", "slug": "digging-through-time"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/veristic-male-portrait/", "id": "T0fq3XFfxrY", "title": "Veristic Male Portrait", "kind": "Video", "description": "Veristic male portrait (similar to Head of a Roman Patrician), early 1st Century B.C.E., marble life size (Vatican Museums, Rome) Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "veristic-male-portrait"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/augustus-of-primaporta-1st-century-c-e-vatican-museums/", "id": "3i8iou6tXqY", "title": "Augustus of Primaporta", "kind": "Video", "description": "Augustus of Primaporta, 1st century C.E. (Vatican Museums). Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "augustus-of-primaporta-1st-century-c-e-vatican-museums"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/colosseum-amphitheatrum-flavium-c-70-80-c-e-rome/", "id": "9wguQaBYKec", "title": "Colosseum (Flavian Amphitheater)", "kind": "Video", "description": "Colosseum (Amphitheatrum Flavium), c. 70-80 C.E., Rome Speakers: Valentina Follo (courtesy of Context Travel), Dr. Beth Harris, Dr. Steven Zucker Cover photo by Julia Avra Ugoretz Views of the Colosseum were taken from the Rome Reborn model of ancient Rome with the permission of The Rome Reborn Project (www.romereborn.virginia.edu). The model is copyright 2004 by The Regents of the University of California. All rights reserved. Speakers: Valentina Follo (courtesy of Context Travel), Dr. Beth Harris, Dr. Steven Zucker Cover photo by Julia Avra Ugoretz. Views of the Colosseum were taken from the Rome Reborn model of ancient Rome with the permission of The Rome Reborn Project (www.romereborn.virginia.edu). The model is copyright 2004 by The Regents of the University of California. All rights reserved. This video illustrates the latest version of the model (2.1), which was created from January to May, 2010.", "slug": "colosseum-amphitheatrum-flavium-c-70-80-c-e-rome"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/trajans-forum/", "id": "y-IAOPxkNWo", "title": "The Forum of Trajan", "kind": "Video", "description": "Apollodorus of Damascus, The Forum of Trajan, dedicated 112 C.E.., Rome. \u00a0A conversation with Dr. Beth Harris and Dr. Steven Zucker.", "slug": "trajans-forum"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/markets-of-trajan/", "id": "z83guai4S68", "title": "Markets of Trajan", "kind": "Video", "description": "Apollodorus of Damascus, The Markets of Trajan, 112 C.E., Rome Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "markets-of-trajan"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/column-of-trajan-completed-113-c-e/", "id": "MFt3tHNevJg", "title": "Column of Trajan", "kind": "Video", "description": "Column of Trajan, Carrara marble, completed 113 C.E., Rome Dedicated to Emperor Trajan (Marcus Ulpius Nerva Traianus b. 53 , d. 117 C.E.) in honor of his victory over Dacia (now Romania) 101-02 and 105-06 C.E.\n\nDedicated to Emperor Trajan (Marcus Ulpius Nerva Traianus b. 53 , d. 117 C.E.) in honor of his victory over Dacia (now Romania) 101-02 and 105-06 C.E.\nThe inscription on the base is the source of the typeface Trajan and reads (with abbreviations spelled out):\n\nSENATUS POPULUSQUE ROMANUS\nIMPERATORI CAESARI DIVI NERVAE FILIO NERVAE\nTRAIANO AUGUSTO GERMANICO DACICO PONTIFICI\nMAXIMO TRIBUNICIA POTESTATE XVII IMPERATORI VI CONSULI VI PATRI PATRIAE\nAD DECLARANDUM QUANTAE ALTITUDINIS\nMONS ET LOCUS TAN[TIS OPER]IBUS SIT EGESTUS\n\nThe Senate and the People of Rome\nTo Emperor Caesar Nerva Trajan Augustus, son of the divine Nerva\nConqueror of Germany and Dacia, high priest, with the office of the tribune 17 times\nProclaimed Imperator 6 times, elected consul 6 times, father of the Empire\nHere shows the height which this hill once stood\nNow removed for such great works as these\n\nSpeakers:\u00a0Valentina Follo (courtesy of\u00a0Context Travel),\u00a0Dr. Beth Harris,\u00a0Dr. Steven Zucker", "slug": "column-of-trajan-completed-113-c-e"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/the-pantheon-rome-c-125/", "id": "KaY8zqYfQI0", "title": "The Pantheon", "kind": "Video", "description": "The Pantheon, Rome, c. 125 Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "the-pantheon-rome-c-125"}, {"path": "khan/test-prep/ap-art-history/ancient-mediterranean-ap/ap-ancient-rome/battle-of-the-romans-and-barbarians-ludovisi-battle-sarcophagus-c-250-260-c-e/", "id": "m4raOIxsbaU", "title": "Ludovisi Battle Sarcophagus", "kind": "Video", "description": "Battle of the Romans and Barbarians (Ludovisi Battle Sarcophagus), c. 250-260 C.E. (Museo Nazionale Romano-Palazzo Altemps, Rome)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "battle-of-the-romans-and-barbarians-ludovisi-battle-sarcophagus-c-250-260-c-e"}], "in_knowledge_map": false, "description": "", "node_slug": "ap-ancient-rome", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/ancient-mediterranean-AP/ap-ancient-rome", "extended_slug": "test-prep/ap-art-history/ancient-mediterranean-AP/ap-ancient-rome", "kind": "Topic", "slug": "ap-ancient-rome"}], "in_knowledge_map": false, "description": "Artistic traditions of the ancient Near East and dynastic Egypt focused on representing royal figures and divinities and on the function of funerary and palatial complexes within their cultural contexts. Works of art illustrate the active exchange of ideas and reception of artistic styles among the Mediterranean cultures and the subsequent influence on the classical world.\n\nBy permission, \u00a9 2013 The College Board", "node_slug": "ancient-mediterranean-AP", "render_type": "Topic", "topic_page_url": "/test-prep/ap-art-history/ancient-mediterranean-AP", "extended_slug": "test-prep/ap-art-history/ancient-mediterranean-AP", "kind": "Topic", "slug": "ancient-mediterranean-ap"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/", "id": "early-europe-and-colonial-americas", "hide": false, "title": "Early Europe and Colonial Americas: 200-1750 C.E.", "child_data": [{"kind": "Topic", "id": "x98c239c7"}, {"kind": "Topic", "id": "xe050f9d2"}, {"kind": "Topic", "id": "x46623881"}, {"kind": "Topic", "id": "x7e203b38"}, {"kind": "Topic", "id": "x76a4e49d"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/", "id": "medieval-europe-islamic-world", "hide": false, "title": "Medieval art in Europe", "child_data": [{"kind": "Article", "id": "1364114303"}, {"kind": "Article", "id": "x3a5c3e8a"}, {"kind": "Article", "id": "x1bd538d7"}, {"kind": "Article", "id": "x11ccc801"}, {"kind": "Article", "id": "x9d5930d9"}, {"kind": "Video", "id": "x5b2ac6da"}, {"kind": "Video", "id": "xfe518fe3"}, {"kind": "Article", "id": "x3a20af53"}, {"kind": "Video", "id": "xa07bc038"}, {"kind": "Article", "id": "xd3bf6779"}, {"kind": "Article", "id": "x4120f3c3"}, {"kind": "Video", "id": "671539948"}, {"kind": "Article", "id": "x48ed6868"}, {"kind": "Video", "id": "xd2e254f8"}, {"kind": "Article", "id": "x94b961c7"}, {"kind": "Video", "id": "xcc644d79"}, {"kind": "Video", "id": "xa8c8ced4"}, {"kind": "Article", "id": "x1b10b412"}, {"kind": "Video", "id": "x4790f2c8"}, {"kind": "Article", "id": "x30b44672"}, {"kind": "Article", "id": "x74ec8905"}, {"kind": "Article", "id": "xa68e4089"}, {"kind": "Video", "id": "x9b729ccf"}, {"kind": "Article", "id": "xfae26a36"}, {"kind": "Video", "id": "671422824"}, {"kind": "Video", "id": "1159766199"}, {"kind": "Video", "id": "1159615005"}, {"kind": "Article", "id": "x2af4fa2e"}, {"kind": "Article", "id": "x87352589"}, {"kind": "Video", "id": "xc95c2474"}, {"kind": "Article", "id": "x774973ea"}, {"kind": "Video", "id": "x03bfdd48"}, {"kind": "Video", "id": "x39fc0169"}, {"kind": "Video", "id": "x625f0c99"}, {"kind": "Video", "id": "xde3729f5"}], "children": [{"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/catacomb-priscilla/", "id": "z_5AAk1jABI", "title": "Catacomb of Priscilla, Rome", "kind": "Video", "description": "Catacomb of Priscilla, Rome, late 2nd century through the 4th century C.E.\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "catacomb-priscilla"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/santa-sabina-rome/", "id": "HjBfBB9r2QM", "title": "Basilica of Santa Sabina, Rome", "kind": "Video", "description": "Basilica of Santa Sabina, 422-432, Rome Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "santa-sabina-rome"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/vienna-genesis/", "id": "ogrRKL30iJ8", "title": "Jacob wresting the angel, Vienna Genesis", "kind": "Video", "description": "The Story of Jacob, Vienna Genesis, \u00a0folio 12v, early 6th century, \u00a0tempera, gold and silver on purple vellum, \u00a0cod. theol. gr. 31 (\u00d6sterreichische Nationalbibliothek, Vienna). Speakers: Dr. Nancy Ross and Dr. Steven Zucker", "slug": "vienna-genesis"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/justinian-and-his-attendants-6th-century-ravenna/", "id": "It3i-dKusIM", "title": "San Vitale, Ravenna", "kind": "Video", "description": "San Vitale is one of the most important surviving examples of Byzantine architecture and mosaic work. It was begun in 526 or 527 under Ostrogothic rule. It was consecrated in 547 and completed soon after. Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "justinian-and-his-attendants-6th-century-ravenna"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/hagia-sophia-istanbul/", "id": "XfpusWEd2jE", "title": "Hagia Sophia, Istanbul", "kind": "Video", "description": "Hagia Sophia, Istanbul, 532-37 (architects: Isidore of Miletus and Anthemius of Tralles)\nA conversation with Dr. Steven Zucker and Dr. Beth Harris", "slug": "hagia-sophia-istanbul"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/hagia-sophia-apse/", "id": "EmQ1TdoT-zE", "title": "Theotokos mosaic, apse, Hagia Sophia, Istanbul", "kind": "Video", "description": "Theotokos mosaic, 867, apse, Hagia Sophia, Istanbul\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "hagia-sophia-apse"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/hagia-sophia-mosque/", "id": "r6383ZDXB0Q", "title": "Hagia Sophia as a mosque", "kind": "Video", "description": "This video focuses on Hagia Sophia after the conquest of Constantinople by the Ottomans in 1453.\u00a0Speakers: Dr. Elizabeth Macaulay-Lewis and Dr. Steven Zucker", "slug": "hagia-sophia-mosque"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/deesis-mosaic/", "id": "2JxIjfqKTLs", "title": "De\u00ebsis mosaic, Hagia Sophia, Istanbul", "kind": "Video", "description": "De\u00ebsis (Christ with the Virgin Mary and John the Baptist), c. 1261, mosaic, imperial enclosure, south gallery, Hagia Sophia, Istanbul\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "deesis-mosaic"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/bayeux-tapestry/", "id": "F8OPQ_28mdo", "title": "The Bayeux Tapestry - Seven Ages of Britain - BBC One", "kind": "Video", "description": "The Bayeux Tapestry. The BBC's David Dimbleby describes the historical significance of the Bayeux Tapestry for his forthcoming BBC One Series, Seven Ages of Britain.", "slug": "bayeux-tapestry"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/part-1-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220/", "id": "w8QRG-Xc6oU", "title": "Cathedral of Notre Dame de Chartres (part 1)", "kind": "Video", "description": "Part 1: Cathedral of Notre Dame de Chartres, c.1145 and 1194-c.1220 This video (1 of 3), focuses on the cathedral's pre-Gothic history, its sacred relic, and the westwerk's royal portal and jamb figures Speakers: Dr. Beth Harris and Dr. Steven Zucker For more: http://smarthistory.org/Gothic.html", "slug": "part-1-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/part-2-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220/", "id": "dN5XRW7T0cc", "title": "Cathedral of Notre Dame de Chartres (part 2)", "kind": "Video", "description": "Part 2: Cathedral of Notre Dame de Chartres, c.1145 and 1194-c.1220 This video (2 of 3), focuses on the cathedral's interior, its stained glass, nave, aisles, elevation, and choir Speakers: Dr. Beth Harris and Dr. Steven Zucker For more: http://smarthistory.org/Gothic.html", "slug": "part-2-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/part-3-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220/", "id": "vAtQB9wLkUA", "title": "Cathedral of Notre Dame de Chartres (part 3)", "kind": "Video", "description": "Part 3: Cathedral of Notre Dame de Chartres, c.1145 and 1194-c.1220\n\nThis video (3 of 3), focuses on the symbolism of light, the cathedral's flying buttresses, transept, the iconography of the north rose window, and the north porch and its sculptural program\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker\n\nFor more: http://smarthistory.org/Gothic.html", "slug": "part-3-cathedral-of-notre-dame-de-chartres-c-1145-and-1194-c-1220"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/roettgen-pieta/", "id": "vsjl4aE2VkA", "title": "R\u00f6ttgen Piet\u00e0", "kind": "Video", "description": "R\u00f6ttgen Piet\u00e0, c. 1300-25, painted wood, 34 1/2 inches high (Rheinisches Landesmuseum, Bonn). \u00a0Speakers: Dr. Nancy Ross and Dr. Beth Harris", "slug": "roettgen-pieta"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/giotto-arena-scrovegni-chapel-padua-c-1305-part-1-of-4/", "id": "47QgqdeSi0U", "title": "Giotto, Arena (Scrovegni) Chapel (part 1)", "kind": "Video", "description": "Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305, Part 1\n\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "giotto-arena-scrovegni-chapel-padua-c-1305-part-1-of-4"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/giotto-arena-scrovegni-chapel-part-2-of-4/", "id": "I356lV1v8Bc", "title": "Giotto, Arena (Scrovegni) Chapel (part 2)", "kind": "Video", "description": "Part 2: The Narrative Cycle from Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "giotto-arena-scrovegni-chapel-part-2-of-4"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/giotto-arena-scrovegni-chapel-part-3-of-4/", "id": "RbBQN0Wt_wY", "title": "Giotto, Arena (Scrovegni) Chapel (part 3)", "kind": "Video", "description": "Part 3: The Lamentation from Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "giotto-arena-scrovegni-chapel-part-3-of-4"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world/giotto-arena-scrovegni-chapel-part-4-of-4/", "id": "6z_Kjsn8VLI", "title": "Giotto, Arena (Scrovegni) Chapel (part 4)", "kind": "Video", "description": "Part 4: The Last Judgment from Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305\n\nSpeakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "giotto-arena-scrovegni-chapel-part-4-of-4"}], "in_knowledge_map": false, "description": "Medieval artistic traditions include late antique, early Christian, Byzantine, Islamic, migratory, Carolingian*, Romanesque, and Gothic, named for their principal culture, religion, government, and/or artistic style. Continuities and exchanges between coexisting traditions in medieval Europe are evident in shared artistic forms, functions, and techniques. Contextual information comes primarily from literary, theological, and governmental (both secular and religious) records, which vary in quantity according to period and geographical region, and to a lesser extent from archaeological excavations. Elite religious and court cultures throughout the Middle Ages prioritized the study of theology, music, literary and poetic invention, and in the Islamic world, scientific and mathematical theory. Cultural and artistic exchanges were facilitated through trade and conquest.\n\nBy permission, \u00a9 2013 The College Board", "node_slug": "medieval-europe-islamic-world", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world", "extended_slug": "test-prep/ap-art-history/early-europe-and-colonial-americas/medieval-europe-islamic-world", "kind": "Topic", "slug": "medieval-europe-islamic-world"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/", "id": "renaissance-art-europe-ap", "hide": false, "title": "Renaissance Art in Europe", "child_data": [{"kind": "Video", "id": "671422828"}, {"kind": "Exercise", "id": "x234ee426"}, {"kind": "Video", "id": "956896601"}, {"kind": "Exercise", "id": "x85519528"}, {"kind": "Video", "id": "669432581"}, {"kind": "Exercise", "id": "x3f4133e0"}, {"kind": "Video", "id": "671563210"}, {"kind": "Article", "id": "xd17a8a37"}, {"kind": "Exercise", "id": "x2698fc84"}, {"kind": "Video", "id": "xe9f10a71"}, {"kind": "Article", "id": "xe836b598"}, {"kind": "Exercise", "id": "x2887a315"}, {"kind": "Video", "id": "719660620"}, {"kind": "Exercise", "id": "xc707482c"}, {"kind": "Video", "id": "816126260"}, {"kind": "Video", "id": "671610551"}, {"kind": "Article", "id": "x12b7e672"}, {"kind": "Article", "id": "x9d60c205"}, {"kind": "Video", "id": "671691295"}, {"kind": "Article", "id": "xf6841137"}, {"kind": "Video", "id": "x22e21ebf"}, {"kind": "Video", "id": "671536493"}, {"kind": "Video", "id": "671610553"}, {"kind": "Article", "id": "xe039512c"}, {"kind": "Article", "id": "x012e0e44"}, {"kind": "Video", "id": "671397709"}, {"kind": "Article", "id": "x892579e3"}, {"kind": "Video", "id": "719832193"}], "children": [{"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/campin-merode-altarpiece-1425-28/", "id": "WdDzs70Txjs", "title": "Workshop of Campin, Annunciation Triptych (Merode Altarpiece)", "kind": "Video", "description": "Robert Campin, Merode Altarpiece, tempera and oil on panel, 1425-28 (Metropolitan Museum of Art) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "campin-merode-altarpiece-1425-28"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/campin-s-merode-altarpiece/", "id": "campin-s-merode-altarpiece", "title": "Workshop of Campin, Annunciation Triptych (Merode Altarpiece) (quiz)", "description": "Test your knowledge.", "slug": "campin-s-merode-altarpiece", "kind": "Exercise"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/brunelleschi-pazzi-chapel-santa-croce-florence-completed-1460s/", "id": "LKv0hRyiGCY", "title": "Brunelleschi, Pazzi Chapel", "kind": "Video", "description": "Filippo Brunelleschi, Pazzi Chapel, Santa Croce, Florence, begun 1420s, completed 1460s Speakers: Dr. Beth Harris and Dt. Steven Zucker", "slug": "brunelleschi-pazzi-chapel-santa-croce-florence-completed-1460s"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/pazzi-chapel-quiz/", "id": "pazzi-chapel-quiz", "title": "Brunelleschi, Pazzi Chapel (quiz)", "description": "Test your knowledge.", "slug": "pazzi-chapel-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/van-eyck-portrait-of-giovanni-arnolfini-and-his-wife-1434/", "id": "9ODhKqFaugQ", "title": "Van Eyck, The Arnolfini Portrait", "kind": "Video", "description": "Jan Van Eyck, The Arnolfini Portrait, tempera and oil on wood, 1434 (National Gallery, London). Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "van-eyck-portrait-of-giovanni-arnolfini-and-his-wife-1434"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/portrait-of-giovanni-arnolfini-and-his-wife-quiz/", "id": "portrait-of-giovanni-arnolfini-and-his-wife-quiz", "title": "Van Eyck, The Arnolfini Portrait (quiz)", "description": "Test your knowledge.", "slug": "portrait-of-giovanni-arnolfini-and-his-wife-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/donatello-david-bronze-c-1440s/", "id": "6kUUJJV_MNA", "title": "Donatello, David", "kind": "Video", "description": "Donatello, David, bronze, late 1420s to the 1460s, likely the 1440s (Museo Nazionale del Bargello, Florence)", "slug": "donatello-david-bronze-c-1440s"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/donatello-s-david-quiz/", "id": "donatello-s-david-quiz", "title": "Donatello, David (quiz)", "description": "Test your knowledge.", "slug": "donatello-s-david-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/alberti-palazzo-rucellai/", "id": "MHuUBkyF8KI", "title": "Alberti, Palazzo Rucellai", "kind": "Video", "slug": "alberti-palazzo-rucellai"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/palazzo-rucellai-quiz/", "id": "palazzo-rucellai-quiz", "title": "Alberti, Palazzo Rucellai (quiz)", "description": "Test your knowledge.", "slug": "palazzo-rucellai-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/fra-filippo-lippi-madonna-and-child-with-two-angels-c-1460-1465/", "id": "Ly2-n1KqNko", "title": "Fra Filippo Lippi, Madonna and Child with two Angels", "kind": "Video", "description": "Fra Filippo Lippi, Madonna and Child with two Angels, c. 1460-1465, tempera on panel, 95 x 63.5 cm (Galleria degli Uffizi, Florence)", "slug": "fra-filippo-lippi-madonna-and-child-with-two-angels-c-1460-1465"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/lippi-s-madonna-and-child-with-two-angels-quiz/", "id": "lippi-s-madonna-and-child-with-two-angels-quiz", "title": "Lippi, Madonna and Child with two Angels (quiz)", "description": "Test your knowledge.", "slug": "lippi-s-madonna-and-child-with-two-angels-quiz", "kind": "Exercise"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/botticelli-the-birth-of-venus-1483-85/", "id": "tdp22elrY7s", "title": "Botticelli, Birth of Venus", "kind": "Video", "description": "Sandro Botticelli, The Birth of Venus, 1483-85, tempera on panel, 68 x 109 5/8\" (172.5 x 278.5 cm), Galeria degli Uffizi, Florence Speakers: Dr. Beth Harris & Dr. Steven Zucker", "slug": "botticelli-the-birth-of-venus-1483-85"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/leonardo-da-vinci-last-supper-1495-98/", "id": "iV6_wTrkd70", "title": "Leonardo, Last Supper", "kind": "Video", "description": "Leonardo da Vinci, Last Supper, oil, tempera, fresco, 1495-98 (Santa Maria delle Grazie, Milan) Speakers: Dr. Beth Harris, Dr. Steven Zucker http://smarthistory.org/leonardo-last-supper.html", "slug": "leonardo-da-vinci-last-supper-1495-98"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/michelangelo-ceiling-of-the-sistine-chapel-1508-12/", "id": "PEE3B8Fsuc0", "title": "Michelangelo, Ceiling of the Sistine Chapel", "kind": "Video", "description": "Michelangelo, Ceiling of the Sistine Chapel, 1508-12, fresco (Vatican, Rome) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "michelangelo-ceiling-of-the-sistine-chapel-1508-12"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/thinking-aloud/", "id": "ICQCUTiC0mI", "title": "Michelangelo, Studies for the Libyan Sibyl (recto); Studies for the Libyan Sibyl and a small Sketch for a Seated Figure (verso)", "kind": "Video", "description": "Met curator Carmen Bambach on the presence of genius in Michelangelo Buonarroti\u2019s Studies for the Libyan Sibyl (recto); Studies for the Libyan Sibyl and a small Sketch for a Seated Figure (verso),\u00a0\u00a0c.\u00a01510\u201311.\n\nThis is the most magnificent drawing by Michelangelo in the United States. A male studio assistant posed for the anatomical study, which was preparatory for the Libyan Sibyl, one of the female seers frescoed on the ceiling of the Sistine Chapel (Vatican Palace) in 1508-12. In the fresco, the figure is clothed except for her powerful shoulders and arms, and has an elaborately braided coiffure. Michelangelo used the present sheet to explore the elements that were crucial in the elegant resolution of the figure's pose, especially the counterpoint twist of shoulders and hips and the manner of weight-bearing on her toe. Recent research shows that this sheet of studies was owned by the Buonarroti family soon after Michelangelo's death. The \"no. 21\" inscribed on the verso of the sheet (at lower center) fits precisely into a numerical sequence found on many other drawings by the artist that have this early Buonarroti family provenance.\n\nView this work on metmuseum.org.\n\nAre you an educator? Here's a related lesson plan. For additional educator resources from The Metropolitan Museum of Art, visit Find an educator resource.", "slug": "thinking-aloud"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/michelangelo-last-judgment-sistine-chapel-ceiling-1628-1629/", "id": "c2MuTvQM61Y", "title": "Michelangelo, Last Judgment (altar wall, Sistine Chapel)", "kind": "Video", "description": "Michelangelo, Last Judgment, Sistine Chapel Ceiling, fresco, 1534-1541 (Vatican City, Rome) Speakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "michelangelo-last-judgment-sistine-chapel-ceiling-1628-1629"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/raphael-school-of-athens/", "id": "Smd-q44ysoM", "title": "Raphael, School of Athens", "kind": "Video", "description": "Raphael, School of Athens, fresco, 1509-1511 (Stanza della Segnatura, Papal Palace, Vatican)\n\nSpeakers: Dr. Steven Zucker, Dr. Beth Harris", "slug": "raphael-school-of-athens"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/pontormo-entombment-or-deposition-from-the-cross-1525-28/", "id": "ABhqENOxSrU", "title": "Pontormo, The Entombment of Christ", "kind": "Video", "description": "Pontormo, Entombment (or Deposition from the Cross), oil on panel, 1525-28 (Capponi Chapel, Santa Felicita, Florence) Speakers: Dr. Steven Zucker, Dr. Beth Harris", "slug": "pontormo-entombment-or-deposition-from-the-cross-1525-28"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap/titian-venus-of-urbino-1538/", "id": "qD6ct0VS15c", "title": "Titian, Venus of Urbino", "kind": "Video", "description": "Titian, Venus of Urbino, 1538, oil on canvas, 119.20 x 165.50 cm (Galleria degli Uffizi, Florence)", "slug": "titian-venus-of-urbino-1538"}], "in_knowledge_map": false, "description": "", "node_slug": "renaissance-art-europe-ap", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap", "extended_slug": "test-prep/ap-art-history/early-europe-and-colonial-americas/renaissance-art-europe-ap", "kind": "Topic", "slug": "renaissance-art-europe-ap"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/", "id": "reformation-counter-reformation", "hide": false, "title": "Protestant Reformation and Catholic Counter-Reformation", "child_data": [{"kind": "Article", "id": "x892579e3"}, {"kind": "Video", "id": "671536495"}, {"kind": "Video", "id": "xf48878fd"}, {"kind": "Video", "id": "671632341"}, {"kind": "Video", "id": "x2bd17f66"}, {"kind": "Article", "id": "x2a3da48e"}, {"kind": "Article", "id": "xb7c3dad4"}, {"kind": "Video", "id": "671686565"}, {"kind": "Video", "id": "671536496"}, {"kind": "Video", "id": "671702330"}, {"kind": "Video", "id": "x7f6822bf"}, {"kind": "Article", "id": "xd50ea57d"}, {"kind": "Video", "id": "xaa8592e4"}, {"kind": "Video", "id": "x46f1afe6"}], "children": [{"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/il-gesu-rome-consecrated-1584/", "id": "aj2el_owSg4", "title": "Il Ges\u00f9, including Triumph of the Name of Jesus ceiling fresco", "kind": "Video", "description": "Giacomo Barozzi da Vignola and Giacomo Barozzi da Vignola, Church of Il Gesu, Rome (consecrated 1584, ceiling fresco, The Triumph of the Name of Jesus, by il Baciccio, also known as Giovanni Battista Gaulli, 1672-1685). Speakers: Frank Dabell, Beth Harris, and Steven Zucker Made with our partners, contexttravel.org", "slug": "il-gesu-rome-consecrated-1584"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/bruegel-hunters/", "id": "Pj3HdzOR2pY", "title": "Bruegel, Hunters in the Snow (Winter)", "kind": "Video", "description": "Pieter Bruegel the Elder, Hunters in the Snow (Winter), 1565, oil on wood, 118 x 161 cm (Kunsthistorisches Museum, Vienna),\u00a0Speakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "bruegel-hunters"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/caravaggio-s-calling-of-st-matthew-c-1599-1600/", "id": "SZF5K8epWko", "title": "Caravaggio, Calling of Saint Matthew", "kind": "Video", "description": "Caravaggio's Calling of St. Matthew, oil on canvas, c. 1599-1600 (Contarelli Chapel, San Luigi dei Francesi, Rome)", "slug": "caravaggio-s-calling-of-st-matthew-c-1599-1600"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/rubens-marie/", "id": "jWQ4V43TJ6o", "title": "Rubens, The Presentation of the Portrait of Marie de' Medici", "kind": "Video", "description": "Peter Paul Rubens, The Presentation of the Portrait of Marie de' Medici, c. 1622-1625, oil on canvas, 394 x 295 cm (Mus\u00e9e du Louvre)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "rubens-marie"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/francesco-borromini-san-carlo-1638-1646/", "id": "Wm-akMcsHEc", "title": "Borromini, San Carlo alle Quattro Fontane", "kind": "Video", "description": "Francesco Borromini, San Carlo alle Quattro Fontane (\"Carlino\"), Rome. Commissioned by Cardinal Francesco Barberini in 1634 for the Holy Order of the Trinity; construction began in 1638 and the church was consecrated in 1646.\n\nSpeakers: Frank Dabell, Dr. Beth Harris, and Dr. Steven Zucker", "slug": "francesco-borromini-san-carlo-1638-1646"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/bernini-ecstasy-of-st-theresa/", "id": "RKcJvjP9zgY", "title": "Bernini, Ecstasy of Saint Teresa", "kind": "Video", "description": "Gian Lorenzo Bernini, Ecstasy of Saint Teresa, 1647-52 (Cornaro Chapel, Santa Maria della Vittoria, Rome). Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\nThis is Saint Teresa's\u00a0description of the event that Bernini depicts:\u00a0\"Beside me, on the left, appeared an angel in bodily form.... He was not tall but short, and very beautiful; and his face was so aflame that he appeared to be one of the highest rank of angels, who seem to be all on fire.... In his hands I saw a great golden spear, and at the iron tip there appeared to be a point of fire. This he plunged into my heart several times so that it penetrated to my entrails. When he pulled it out I felt that he took them with it, and left me utterly consumed by the great love of God. The pain was so severe that it made me utter several moans. The sweetness caused by this intense pain is so extreme that one cannot possibly wish it to cease, nor is one's soul content with anything but God. This is not a physical but a spiritual pain, though the body has some share in it\u2014even a considerable share.\"", "slug": "bernini-ecstasy-of-st-theresa"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/vel-zquez-las-meninas-c-1656/", "id": "IiTtGENiVOA", "title": "Vel\u00e1zquez, Las Meninas", "kind": "Video", "description": "Diego Rodr\u00edguez de Silva y Vel\u00e1zquez, Las Meninas, c. 1656, oil on canvas, 125 1/4 x 108 5/8 in. (318 x 276 cm), (Museo Nacional del Prado, Madrid)", "slug": "vel-zquez-las-meninas-c-1656"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/vermeer-woman-with-balance/", "id": "WO1I1dN0DaA", "title": "Johannes Vermeer, Woman Holding a Balance", "kind": "Video", "description": "Johannes Vermeer, Woman Holding a Balance, 1664, oil on canvas, 42.5 cm \u00d7 38 cm / 16.7 in \u00d7 15 in (National Gallery of Art)\n\nSpeakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "vermeer-woman-with-balance"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/ruysch-flowers-insects/", "id": "EK-h6cZCXrs", "title": "Rachel Ruysch, Fruit and Insects", "kind": "Video", "description": "Rachel Ruysch, Fruit and Insects, 1711, oil on wood, 44 x 60 cm (Galleria degli Uffizi, Florence); speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "ruysch-flowers-insects"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation/william-hogarth-s-marriage-a-la-mode-c-1743/", "id": "mFJ9tHJA2Sw", "title": "William Hogarth, Marriage A-la-Mode (including T\u00eate \u00e0 T\u00eate)", "kind": "Video", "description": "William Hogarth, Marriage A-la-Mode, c. 1743, oil on canvas, 69.9 x 90.8 cm (The National Gallery, London)\n1. The Marriage Settlement\n2. The T\u00eate \u00e0 T\u00eate\n3, The Inspection\n4. The Toilette\n5. The Bagnio\n6. The Lady's Death\nSpeakers: Dr. Steven Zucker & Dr. Beth Harris", "slug": "william-hogarth-s-marriage-a-la-mode-c-1743"}], "in_knowledge_map": false, "description": "Production of religious imagery declined in northern Europe, and nonreligious genres, such as landscape, still life, genre, history, mythology, and portraiture, developed and flourished. In the south, there was an increase in the production of political propaganda, religious imagery, and pageantry, with the elaboration of naturalism, dynamic compositions, bold color schemes, and the affective power of images and constructed spaces. Production of religious imagery declined in northern Europe, and nonreligious genres, such as landscape, still life, genre, history, mythology, and portraiture, developed and flourished. In the south, there was an increase in the production of political propaganda, religious imagery, and pageantry, with the elaboration of naturalism, dynamic compositions, bold color schemes, and the affective power of images and constructed spaces.\n\nBy permission, \u00a9 2013 The College Board", "node_slug": "reformation-counter-reformation", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation", "extended_slug": "test-prep/ap-art-history/early-europe-and-colonial-americas/reformation-counter-reformation", "kind": "Topic", "slug": "reformation-counter-reformation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/colonial-americas/", "id": "colonial-americas", "hide": false, "title": "Colonial Americas", "child_data": [{"kind": "Article", "id": "x0df8d6f8"}, {"kind": "Article", "id": "x424f5764"}, {"kind": "Video", "id": "x0ce01d2d"}, {"kind": "Video", "id": "xf1f01e94"}, {"kind": "Article", "id": "x127691ba"}, {"kind": "Article", "id": "xfb27759c"}], "children": [{"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/colonial-americas/brooklyn-biombo/", "id": "jT0hslicvFc", "title": "Screen with the Siege of Belgrade and Hunting Scene (Brooklyn Biombo)", "kind": "Video", "description": "Circle of the Gonzales family (artist), c. 1697-1701, Mexico, oil on wood, inlaid with mother-of-pearl, 229.9 x 275.8 cm (Brooklyn Museum and Museo Nacional del Virreinato - INAH, Tepotzotl\u00e1n)\nSpeakers: Dr. Lauren G. Kilroy-Ewbank and Dr. Steven Zucker", "slug": "brooklyn-biombo"}, {"path": "khan/test-prep/ap-art-history/early-europe-and-colonial-americas/colonial-americas/virgin-of-guadalupe/", "id": "imkOrmHtSJ0", "title": "Virgin of Guadalupe", "kind": "Video", "description": "Virgin of Guadalupe, late 17th century, 190 cm high, oil paint, gilding, and mother of pearl on panel (Franz Mayer Museum, Mexico City). Speakers: Dr. Lauren Kilroy-Ewbank and Dr. Beth Harris", "slug": "virgin-of-guadalupe"}], "in_knowledge_map": false, "description": "", "node_slug": "colonial-americas", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/early-europe-and-colonial-americas/colonial-americas", "extended_slug": "test-prep/ap-art-history/early-europe-and-colonial-americas/colonial-americas", "kind": "Topic", "slug": "colonial-americas"}], "in_knowledge_map": false, "description": "", "node_slug": "early-europe-and-colonial-americas", "render_type": "Topic", "topic_page_url": "/test-prep/ap-art-history/early-europe-and-colonial-americas", "extended_slug": "test-prep/ap-art-history/early-europe-and-colonial-americas", "kind": "Topic", "slug": "early-europe-and-colonial-americas"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/ap-art-history/later-europe-and-americas/", "id": "later-europe-and-americas", "hide": false, "title": "Later Europe and Americas: 1750-1980 C.E.", "child_data": [{"kind": "Topic", "id": "x0033b888"}, {"kind": "Topic", "id": "x81e5e566"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/", "id": "enlightenment-revolution", "hide": false, "title": "Enlightenment and revolution", "child_data": [{"kind": "Article", "id": "xb9f8df53"}, {"kind": "Article", "id": "xbee59f1a"}, {"kind": "Video", "id": "671539972"}, {"kind": "Article", "id": "x5d1fadb0"}, {"kind": "Video", "id": "671539970"}, {"kind": "Article", "id": "x936ec236"}, {"kind": "Article", "id": "xba124e24"}, {"kind": "Article", "id": "xe281b878"}, {"kind": "Article", "id": "x675d8f3f"}, {"kind": "Article", "id": "xc1acaff6"}, {"kind": "Video", "id": "671656221"}, {"kind": "Video", "id": "671539974"}, {"kind": "Article", "id": "x507c4478"}, {"kind": "Video", "id": "x5cceda7d"}, {"kind": "Article", "id": "xcd1e5a83"}, {"kind": "Article", "id": "x980bccee"}, {"kind": "Video", "id": "1239028451"}, {"kind": "Video", "id": "xe988b1a9"}], "children": [{"path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/fragonard-the-swing-1767/", "id": "rVI5Sjm0xKI", "title": "Fragonard, The Swing", "kind": "Video", "description": "Jean-Honor\u00e9 Fragonard, The Swing, oil on canvas, 1767 (Wallace Collection, London) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "fragonard-the-swing-1767"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/david-oath-of-the-horatii-1784/", "id": "Mawq5PKRB6k", "title": "David, Oath of the Horatii", "kind": "Video", "description": "Jacques-Louis David, Oath of the Horatii, oil on canvas, 1784 (Mus\u00e9e du Louvre)", "slug": "david-oath-of-the-horatii-1784"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/ingres-la-grande-odalisque-1814/", "id": "lSV-J1JHDFY", "title": "Ingres, La Grande Odalisque", "kind": "Video", "description": "Jean-Auguste-Dominique Ingres, La Grande Odalisque, 1814, Oil on canvas, 36\" x 63\" (91 x 162 cm), (Mus\u00e9e du Louvre, Paris)", "slug": "ingres-la-grande-odalisque-1814"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/delacroix-liberty-leading-the-people-1830/", "id": "BP5mCFyBCq8", "title": "Delacroix, Liberty Leading the People", "kind": "Video", "description": "Eug\u00e8ne Delacroix, Liberty Leading the People, oil on canvas, 2.6 x 3.25m, 1830 (Mus\u00e9e du Louvre, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "delacroix-liberty-leading-the-people-1830"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/cole-oxbow/", "id": "RQ0855yB2ZM", "title": "Thomas Cole, The Oxbow", "kind": "Video", "description": "Thomas Cole, View from Mount Holyoke, Northampton, Massachusetts, after a Thunderstorm\u2014The Oxbow, 1836, oil on canvas, 51 1/2 x 76 inches / 130.8 x 193 cm (The Metropolitan Museum of Art) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "cole-oxbow"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/turner-slave-ship-slavers-throwing-overboard-the-dead-and-dying-typhoon-coming-on-1840/", "id": "NoCW80MEGXY", "title": "Turner, Slave Ship", "kind": "Video", "description": "Joseph Mallord William Turner, Slave Ship (Slavers Throwing Overboard the Dead and Dying, Typhoon Coming On), 1840 (Museum of Fine Arts, Boston) Speakers: Lori Landay & Beth Harris", "slug": "turner-slave-ship-slavers-throwing-overboard-the-dead-and-dying-typhoon-coming-on-1840"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution/palace-westminster/", "id": "7oBUIo5R5qg", "title": "Charles Barry and A.W.N. Pugin, Palace of Westminster (Houses of Parliament)", "kind": "Video", "description": "Charles Barry and A.W.N. Pugin, Palace of Westminster (Houses of Parliament), 1840-70, London\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "palace-westminster"}], "in_knowledge_map": false, "description": "The Enlightenment set the stage for this era. Scientific inquiry and empirical evidence were promoted in order to reveal and understand the physical world. Belief in knowledge and progress led to revolutions and a new emphasis on human rights. Subsequently, Romanticism offered a critique of Enlightenment principles and industrialization. Philosophies of Marx and Darwin impacted worldviews, followed by the work of Freud and Einstein. Later, postmodern theory influenced art making and the study of art. In addition, artists were affected by exposure to diverse cultures, largely as a result of colonialism. The advent of mass production supplied artists with ready images, which they were quick to appropriate.\n\nBy permission, \u00a9 2013 The College Board", "node_slug": "enlightenment-revolution", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution", "extended_slug": "test-prep/ap-art-history/later-europe-and-americas/enlightenment-revolution", "kind": "Topic", "slug": "enlightenment-revolution"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/", "id": "modernity-ap", "hide": false, "title": "Modernism", "child_data": [{"kind": "Article", "id": "x867c8291"}, {"kind": "Article", "id": "x980bccee"}, {"kind": "Video", "id": "1239463263"}, {"kind": "Video", "id": "671656226"}, {"kind": "Video", "id": "x287fb460"}, {"kind": "Article", "id": "x3678f46f"}, {"kind": "Article", "id": "xc83252f7"}, {"kind": "Article", "id": "xf5b3b7e3"}, {"kind": "Article", "id": "xbd76ba50"}, {"kind": "Article", "id": "x2e449e47"}, {"kind": "Article", "id": "x2833b4ad"}, {"kind": "Article", "id": "x0407cafe"}, {"kind": "Video", "id": "671385817"}, {"kind": "Article", "id": "x64ef5293"}, {"kind": "Video", "id": "868390389"}, {"kind": "Video", "id": "x4b8acb29"}, {"kind": "Article", "id": "xc86cdb3e"}, {"kind": "Article", "id": "x9fa2a410"}, {"kind": "Video", "id": "xd558ad8f"}, {"kind": "Article", "id": "xeb97fcf8"}, {"kind": "Article", "id": "x842c92d7"}, {"kind": "Article", "id": "xa1a37764"}, {"kind": "Article", "id": "x9c0ec41a"}, {"kind": "Article", "id": "xb1a7fac8"}, {"kind": "Article", "id": "xb544eca1"}, {"kind": "Video", "id": "x404f636f"}, {"kind": "Video", "id": "x33a3e7fd"}, {"kind": "Video", "id": "1233757970"}, {"kind": "Article", "id": "x9f81f264"}, {"kind": "Article", "id": "xa786b2fc"}, {"kind": "Article", "id": "x2291b261"}, {"kind": "Article", "id": "xd1761ba2"}, {"kind": "Video", "id": "671718108"}, {"kind": "Video", "id": "671738053"}, {"kind": "Article", "id": "xb9f62fa8"}, {"kind": "Article", "id": "xb9e7a97b"}, {"kind": "Article", "id": "xb036feb0"}, {"kind": "Article", "id": "xa8289a49"}, {"kind": "Video", "id": "671385822"}, {"kind": "Article", "id": "x385f0c10"}], "children": [{"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/manet-olympia-1863-exhibited-1865/", "id": "bihBbqzL96Y", "title": "Manet, Olympia", "kind": "Video", "description": "\u00c9douard Manet, Olympia, oil on canvas, 1863 (Mus\u00e9e d'Orsay, Paris) Speakers: Dr. Beth Harris and Dr. Steven Zucker\n\n\u00a0\n\n\u00c9douard Manet brought to Realism his curiosity about social mores. However, he was not interested in mirroring polite parlor conversations and middle class promenades in the Bois de \u00a0Boulogne (Paris\u2019 Central Park). Rather, Manet invented subjects that set the Parisians\u2019 teeth on edge.\u00a0\n\nIn 1865, Manet submitted his risqu\u00e9 painting of a courtesan greeting her client (in this case, you), Olympia, of 1863, to the French Salon. The jury for the 1865 Salon accepted this painting despite their disapproval of the subject matter, because two years earlier, Manet\u2019s Luncheon on the Grass created such a stir when it was rejected from the Salon. (It was instead exhibited in Emperor Napoleon III\u2019s conciliatory exhibition\u2014the Salon des R\u00e9fus\u00e9s, or the Exhibition of the Refused. Crowds came to the Salon des R\u00e9fus\u00e9s specifically to laugh and jeer at what they considered Manet\u2019s folly.)\n\nSomehow they were afraid another rejection would seem like a personal attack on Manet himself. The reasoning was odd, but the result was the same\u2014Olympia became infamous and the painting had to be hung very high to protect it from physical attacks.\u00a0\n\nManet was a Realist, but sometimes his \u201creal\u201d situations shocked and rocked the Parisian art world to its foundations. His later work was much tamer.\n\n(Text by Dr. Beth Gersh-Nesic)", "slug": "manet-olympia-1863-exhibited-1865"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/claude-monet-gare-st-lazare-1877/", "id": "sYQ5CSyACpc", "title": "Monet, Gare St. Lazare", "kind": "Video", "description": "Claude Monet, Gare St. Lazare, 1877 (Musee d'Orsay)", "slug": "claude-monet-gare-st-lazare-1877"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/jos-mara-velasco-the-valley-of-mexico-from-the-santa-isabel-mountain-range-1875/", "id": "abc1Y4X-id8", "title": "Velasco, The Valley of Mexico", "kind": "Video", "description": "Jos\u00e9 Mar\u00eda Velasco, The Valley of Mexico from the Santa Isabel Mountain Range (Valle de M\u00e9xico desde el cerro de Santa Isabel),1875, oil on canvas, 137.5 x 226 cm (Museo Nacional de Arte, INBA, Mexico City)\n\nSpeakers: Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker", "slug": "jos-mara-velasco-the-valley-of-mexico-from-the-santa-isabel-mountain-range-1875"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/picasso-les-demoiselles-d-avignon-1907/", "id": "fy2TlYnYIzA", "title": "Picasso, Les Demoiselles d'Avignon", "kind": "Video", "description": "Pablo Picasso, Les Demoiselles d'Avignon, 1907 (Museum of Modern Art)", "slug": "picasso-les-demoiselles-d-avignon-1907"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/gustav-klimt-the-kiss-1907-8/", "id": "BRUOACBkFRg", "title": "Gustav Klimt, The Kiss", "kind": "Video", "description": "Gustav Klimt, The Kiss, 1907-8, oil and gold leaf on canvas, 180 x 180 cm (\u00d6sterreichische Galerie Belvedere, Vienna)", "slug": "gustav-klimt-the-kiss-1907-8"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/btheki/", "id": "r3ttwvNvors", "title": "Constantin Brancusi, The Kiss", "kind": "Video", "description": "Constantin Brancusi, The Kiss, 1916, limestone, 58.4 x 33.7 x 25.4 cm (Philadelphia Museum of Art)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "btheki"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/kandinsky-improv28/", "id": "Sa3FyvaKYVw", "title": "Kandinsky, Improvisation 28 (second version), 1912", "kind": "Video", "description": "Vasily Kandinsky, Improvisation 28 (second version), 1912, oil on canvas, 111.4 x 162.1 cm (Solomon R. Guggenheim Museum, New York) Speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "kandinsky-improv28"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/lawrence-migration-series/", "id": "ZLC8xRNcJvE", "title": "Jacob Lawrence, The Migration Series (*short version*)", "kind": "Video", "description": "Jacob Lawrence, The Migration Series, 1940-41, 60 panels, tempera on hardboard (even numbers at The Museum of Modern Art, odd numbers at the Phillips Collection) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "lawrence-migration-series"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/lawrence-migration-long/", "id": "t4lgvB5cV5E", "title": "Jacob Lawrence, The Migration Series (*long version*)", "kind": "Video", "description": "Jacob Lawrence, The Migration Series, 1940-41, 60 panels, tempera on hardboard (even numbers at The Museum of Modern Art, odd numbers at the Phillips Collection) Speakers: Dr. Steven Zucker and Dr. Beth Harris", "slug": "lawrence-migration-long"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/marcel-duchamp-fountain-1917/", "id": "FmjSUyyc-3M", "title": "Duchamp, Fountain", "kind": "Video", "description": "Marcel Duchamp, Fountain, 1917/1964, porcelain urinal, paint, San Francisco Museum of Modern Art. Speakers:\u00a0\u00a0Dr. Beth Harris and Dr. Steven Zucker", "slug": "marcel-duchamp-fountain-1917"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/willem-de-kooning-woman-i-1950-52/", "id": "WEYKoJTIHcE", "title": "de Kooning's Woman I", "kind": "Video", "description": "Willem de Kooning, Woman I, oil on canvas, 1950-52 (MoMA)\n\nSpeakers: Dr. Beth Harris, Dr. Steven Zucker", "slug": "willem-de-kooning-woman-i-1950-52"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/mies-van-der-rohe-seagram-building-new-york-city-1958/", "id": "ZyyuflY5k2k", "title": "Mies van der Rohe, Seagram Building", "kind": "Video", "description": "Ludwig Mies van der Rohe, Seagram Building, 375 Park Avenue, New York City (1958) Speakers: Dr. Matthew Postal, Dr. Steven Zucker. Note: In the video we call Le Corbusier a French architect, but he was born in Swizerland and became a French citizen in 1930.", "slug": "mies-van-der-rohe-seagram-building-new-york-city-1958"}, {"path": "khan/test-prep/ap-art-history/later-europe-and-americas/modernity-ap/smithson-spiral-jetty-1970/", "id": "NUu0_Zn55yM", "title": "Smithson, Spiral Jetty", "kind": "Video", "description": "Robert Smithson, Spiral Jetty, 1970 (Great Salt Lake, Utah) Speakers: Dr. Beth Harris and Dr. Shana Gallagher-Lindsay http://www.smarthistory.org/earth-artsmithsons-spiral-jetty.html", "slug": "smithson-spiral-jetty-1970"}], "in_knowledge_map": false, "description": "Diverse artists with a common dedication to innovation came to be discussed as the avant-garde. Subdivisions include Neoclassicism, Romanticism, Realism, Impressionism, Post-Impressionism, Symbolism, Expressionism, Cubism, Constructivism, Abstraction, Surrealism, Abstract Expressionism, Pop Art, performance art, and earth and environmental art. Many of these categories fall under the general heading of modernism.\n\n\u00a9 2013 The College Board", "node_slug": "modernity-ap", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/later-europe-and-americas/modernity-ap", "extended_slug": "test-prep/ap-art-history/later-europe-and-americas/modernity-ap", "kind": "Topic", "slug": "modernity-ap"}], "in_knowledge_map": false, "description": "From the mid-1700s to 1980 C.E., Europe and the Americas experienced rapid change and innovation. Art existed in the context of dramatic events such as industrialization, urbanization, economic upheaval, migrations, and wars. Countries and governments were re-formed; women\u2019s and civil rights\u2019 movements catalyzed social change.\n\nArtists assumed new roles in society. Styles of art proliferated and often gave rise to artistic movements. Art and architecture exhibited a diversity of styles, forming an array of \u201cisms.\u201d Works of art took on new roles and functions in society and were experienced by audiences in new ways. Art of this era often proved challenging for audiences and patrons to immediately understand.", "node_slug": "later-europe-and-americas", "render_type": "Topic", "topic_page_url": "/test-prep/ap-art-history/later-europe-and-americas", "extended_slug": "test-prep/ap-art-history/later-europe-and-americas", "kind": "Topic", "slug": "later-europe-and-americas"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/indigenous-americas/", "id": "indigenous-americas", "hide": false, "title": "Indigenous Americas", "child_data": [{"kind": "Article", "id": "x7274d016"}, {"kind": "Article", "id": "x0298dbfa"}, {"kind": "Article", "id": "xbc158ef1"}, {"kind": "Article", "id": "xa99f986f"}, {"kind": "Article", "id": "xf5ed4352"}, {"kind": "Video", "id": "xdfd0ab08"}, {"kind": "Video", "id": "x8af81224"}, {"kind": "Video", "id": "xf301545c"}, {"kind": "Video", "id": "x90ee2a94"}, {"kind": "Article", "id": "x33bb59f9"}, {"kind": "Article", "id": "xee6c73af"}, {"kind": "Article", "id": "x3ab73dc7"}, {"kind": "Article", "id": "x39740fc8"}, {"kind": "Article", "id": "x86610993"}, {"kind": "Article", "id": "x4c2974c4"}, {"kind": "Article", "id": "x8d659636"}, {"kind": "Article", "id": "x6883611b"}], "children": [{"path": "khan/test-prep/ap-art-history/indigenous-americas/sun-stone/", "id": "Zn03u3-U1fk", "title": "The Sun Stone (The Calendar Stone)", "kind": "Video", "description": "The Sun Stone (or The Calendar Stone), Aztec, reign of Moctezuma II (1502-20), discovered in 1790 at the southeastern edge of the Plaza Mayor (Zocalo) in Mexico City, stone (unfinished), 358 cm diameter x 98 cm depth (Museo Nacional de Antropolog\u00eda)\n\nSpeakers: Dr. Lauren Kilroy-Ewbank and Dr. Beth Harris", "slug": "sun-stone"}, {"path": "khan/test-prep/ap-art-history/indigenous-americas/coyolxauhqui-monolith/", "id": "Z1rqLNz8Zo0", "title": "Coyolxauhqui Stone", "kind": "Video", "description": "Coyolxauhqui Monolith (Aztec), c. 1500, volcanic stone, found Templo Mayor, Tenochtitlan, excavated 1978 (Museo del Templo Mayor, Mexico City)\nSpeakers: Dr. Beth Harris and Dr. Lauren Kilroy-Ewbank", "slug": "coyolxauhqui-monolith"}, {"path": "khan/test-prep/ap-art-history/indigenous-americas/olmec-mask/", "id": "D9uJxXnDTU8", "title": "Olmec mask (Olmec-style mask)", "kind": "Video", "description": "Olmec mask (Olmec-style mask), c. 1200 - 400 B.C.E., jadeite, 4 x 3-3/8 x 1-1/4 inches found in offering 20 buried c. 1470 C.E. at the Aztec Templo Mayor (Museo del Templo Mayor, Mexico City)\nSpeakers: Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker\n\nItems buried in offerings included ceramic vessels, stone sculptures, obsidian blades, seashells, greenstone, and objects gathered from earlier locales (like Olmec sites and the city of Teotihuacan).\u00a0The Olmecs are known as \u201crubber people,\u201d a name given to the peoples of the Gulf Coast after the Spanish Conquest. We don\u2019t know what they called themselves.\u00a0Jadeite was quarried in the Sierra de las Minas in Guatemala, and was imported to the Gulf Coast of Mexico.\u00a0Items acquired via trade or tribute [by the Aztecs] included feathers, obsidian, jadeite, cotton, cacao, and turquoise.", "slug": "olmec-mask"}, {"path": "khan/test-prep/ap-art-history/indigenous-americas/feathered-headdress-aztec/", "id": "Q_Lp76ZkDE0", "title": "Feathered headdress", "kind": "Video", "description": "Feathered headdress, Aztec, reproduction (National Anthropology Museum, Mexico City) Original: Feathered headdress, Mexico, Aztec, early 16th century, quetzal, cotinga, roseate spoonbill, piaya feathers; wood, fibers, amate paper, cotton, gold, gilded brass (World Museum, Vienna)\n\nThe headdress is also called the \u201cPenacho of Moctezuma II.\u201d\n\n\u201cMoctezuma II\u2019s Headdress\u201d was first mentioned in a European inventory in 1596, when it was acquired by Austrian Archduke Ferdinand II von Tyrol. It was listed there as \u201ca Moorish hat.\u201d\u00a0It was likely an object sent from Mesoamerica\u00a0to Europe by Hernan Cortes, but it is unknown whether it actually belonged to Moctezuma II himself.\n\nA conversation with Dr. Lauren Kilroy-Ewbank and Dr. Beth Harris", "slug": "feathered-headdress-aztec"}], "in_knowledge_map": false, "description": "Art of the Indigenous Americas is among the world\u2019s oldest artistic traditions. While its roots lie in northern Asia, it developed independently between c. 10,000 B.C.E. and 1492 C.E., which marked the beginning of the European invasions. Regions and cultures are referred to as the Indigenous Americas to signal the priority of First Nations cultural traditions over those of the colonizing and migrant peoples that have progressively taken over the American continents for the last 500 years.", "node_slug": "indigenous-americas", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/indigenous-americas", "extended_slug": "test-prep/ap-art-history/indigenous-americas", "kind": "Topic", "slug": "indigenous-americas"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/africa-ap/", "id": "africa-ap", "hide": false, "title": "Africa: 1100-1980 C.E.", "child_data": [{"kind": "Video", "id": "xe0f4168a"}, {"kind": "Article", "id": "xfe06e783"}, {"kind": "Video", "id": "x9661c25a"}, {"kind": "Article", "id": "xa5df54bf"}, {"kind": "Article", "id": "xbeac45d4"}, {"kind": "Video", "id": "xdaa92c6d"}, {"kind": "Video", "id": "x9370d62b"}, {"kind": "Video", "id": "xa909c637"}, {"kind": "Video", "id": "xabed2520"}, {"kind": "Video", "id": "xba26ef6d"}, {"kind": "Video", "id": "x45e69fda"}], "children": [{"path": "khan/test-prep/ap-art-history/africa-ap/great-zimbabwe-unesconhk/", "id": "I1KRjQmFEIc", "title": "Great Zimbabwe National Monument (UNESCO/NHK)", "kind": "Video", "description": "The ruins of Great Zimbabwe, the capital of the Queen of Sheba, according to an age-old legend are a unique testimony to the Bantu civilization of the Shona between the 11th and 15th centuries. The city, which covers an area of nearly 80 ha, was an important trading centre and was renowned from the Middle Ages onwards. Source: UNESCO TV / \u00a9 NHK Nippon Hoso Kyokai URL: http://whc.unesco.org/en/list/364/", "slug": "great-zimbabwe-unesconhk"}, {"path": "khan/test-prep/ap-art-history/africa-ap/sika-dwa-kofi-golden-stool/", "id": "6bsWW4Ke_Hs", "title": "Sika dwa kofi (Golden Stool), Asante people", "kind": "Video", "description": "Sika dwa kofi (Golden Stool), Asante people (Ghana), c. 1700 and Asante gold weights (University of Pennsylvania Museum of Archaeology and Anthropology)\nSpeakers: Dr. Peri Klemm and Dr. Beth Harris", "slug": "sika-dwa-kofi-golden-stool"}, {"path": "khan/test-prep/ap-art-history/africa-ap/female-pwo-mask/", "id": "AVNuN89x090", "title": "Female (pwo) mask, Chokwe people", "kind": "Video", "description": "Female (pwo) mask, Chokwe people, Democratic Republic of Congo, early 20th century, wood, plant fiber, pigment, copper alloy, 39.1 cm high (Smithsonian National Museum of African Art) Speakers: Dr. Peri Klemm and Dr. Beth Harris", "slug": "female-pwo-mask"}, {"path": "khan/test-prep/ap-art-history/africa-ap/sande-bundu/", "id": "FN1qz8tp89g", "title": "Bundu or Sowei Helmet Mask", "kind": "Video", "description": "Bundu\u00a0or Sowei Helmet Mask (Ndoli Jowei), Mende, Nguabu Master (Moyamba district, Sierra Leone), late 19th-early 20th century, wood and pigment, 39.4 x 23.5 x 26 cm (Brooklyn Museum) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "slug": "sande-bundu"}, {"path": "khan/test-prep/ap-art-history/africa-ap/ikenga/", "id": "kRikHc8U8zI", "title": "Ikenga (Igbo Peoples)", "kind": "Video", "description": "Ikenga, Igbo Peoples, Nigeria, wood (University of Pennsylvania Museum of Archaeology and Anthropology) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "slug": "ikenga"}, {"path": "khan/test-prep/ap-art-history/africa-ap/elephant-mask/", "id": "t-4O17cw9cw", "title": "Elephant Mask, Kuosi Society, Bamileke Peoples, Cameroon", "kind": "Video", "description": "Elephant (Aka) Mask, Kuosi Society, Bamileke Peoples, Grassfields region of Cameroon, 20th century, cloth, beads, raffia, fiber, 146.7 x 52.1 x 29.2 cm (Brooklyn Museum) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "slug": "elephant-mask"}, {"path": "khan/test-prep/ap-art-history/africa-ap/fang-reliquary/", "id": "OS4Q5TN8oJU", "title": "Fang Reliquary Figure", "kind": "Video", "description": "Reliquary Guardian Figure (Eyema-o-Byeri), Gabon, Fang peoples, mid 18th to mid 19th century, wood and iron, 58.4 cm high (Brooklyn Museum) Speakers: Dr. Peri Klemm and Dr. Beth Harris", "slug": "fang-reliquary"}, {"path": "khan/test-prep/ap-art-history/africa-ap/olowe-veranda/", "id": "Yc9NJnx58Wg", "title": "Olowe of Ise, Veranda Post (Yoruba people)", "kind": "Video", "description": "Olowe of Ise, Veranda Post, before 1938 (Yoruba people, Nigeria), wood, pigment, 180.3 x 28.6 x 35.6 cm (The Metropolitan Museum of Art) Speakers: Dr. Peri Klemm and Dr. Steven Zucker", "slug": "olowe-veranda"}], "in_knowledge_map": false, "description": "Human life, which is understood to have begun in Africa, developed over millions of years and radiated beyond the continent of Africa. The earliest African art dates to 77,000 years ago. While interpretation of this art is conjectural at best, the clarity and strength of design and expression in the work is obvious.", "node_slug": "africa-ap", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/africa-ap", "extended_slug": "test-prep/ap-art-history/africa-ap", "kind": "Topic", "slug": "africa-ap"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/west-and-central-asia/", "id": "west-and-central-asia", "hide": false, "title": "West and central Asia: 500 B.C.E.-1980 C.E.", "child_data": [{"kind": "Article", "id": "x631908ca"}, {"kind": "Article", "id": "xd416c031"}, {"kind": "Article", "id": "x7294f55b"}, {"kind": "Video", "id": "x0e0923d6"}, {"kind": "Article", "id": "x42a1661e"}, {"kind": "Video", "id": "x8bbe4f67"}, {"kind": "Article", "id": "x6515a5af"}, {"kind": "Article", "id": "x93af2435"}, {"kind": "Article", "id": "x34d6af78"}, {"kind": "Article", "id": "xb8e8fe69"}, {"kind": "Video", "id": "x53070816"}, {"kind": "Article", "id": "x46650bea"}, {"kind": "Article", "id": "x4c5ce64d"}], "children": [{"path": "khan/test-prep/ap-art-history/west-and-central-asia/unesco-siq-project/", "id": "WZgYhVgWR8g", "title": "Petra: UNESCO Siq Project", "kind": "Video", "description": "The Siq is one of Petra\u2019s most endangered areas, in which natural environmental risks pose a major threat to the cultural heritage and the visitors. Thus, systematic identification and monitoring of its potentially unstable areas is needed. The Jordanian government made a request in 2011 for assistance in this regard, and subsequently a rapid assessment of the Siq was carried out by UNESCO to identify the unstable blocks and map risk zones in the Siq. Read more here.", "slug": "unesco-siq-project"}, {"path": "khan/test-prep/ap-art-history/west-and-central-asia/bamiyan-ten-years-on/", "id": "nENvd7Zj1Qs", "title": "Bamiyan: Ten years on", "kind": "Video", "slug": "bamiyan-ten-years-on"}, {"path": "khan/test-prep/ap-art-history/west-and-central-asia/ibn-al-zain-basin/", "id": "2IT6FcvBp_w", "title": "Basin (Baptist\u00e8re de Saint Louis)", "kind": "Video", "description": "Mohammed ibn al-Zain, Basin (Baptist\u00e8re de Saint Louis), c. 1320-40, brass inlaid with silver and gold, 22.2 x 50.2 cm, Egypt or Syria (Mus\u00e9e du Louvre, Paris)\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "ibn-al-zain-basin"}], "in_knowledge_map": false, "description": "The arts of West and Central Asia play a key role in the history of world art, giving form to the vast cultural interchanges that have occurred in these lands that link the European and Asian peoples.", "node_slug": "west-and-central-asia", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/west-and-central-asia", "extended_slug": "test-prep/ap-art-history/west-and-central-asia", "kind": "Topic", "slug": "west-and-central-asia"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/test-prep/ap-art-history/south-east-se-asia/", "id": "south-east-se-asia", "hide": false, "title": "South, East, and Southeast Asia: 300 B.C.E. - 1980 C.E.", "child_data": [{"kind": "Topic", "id": "xdc3e199f"}, {"kind": "Topic", "id": "xdc3ee18f"}, {"kind": "Topic", "id": "x7d79281e"}, {"kind": "Topic", "id": "x2ed21d8c"}, {"kind": "Topic", "id": "xa79a18a6"}, {"kind": "Topic", "id": "x0e49c032"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/south-east-se-asia/india-art/", "id": "india-art", "hide": false, "title": "India", "child_data": [{"kind": "Article", "id": "1330586045"}, {"kind": "Article", "id": "x0db8606f"}, {"kind": "Video", "id": "x64539d32"}, {"kind": "Article", "id": "x36063beb"}, {"kind": "Video", "id": "xeead428c"}, {"kind": "Article", "id": "x7eacd04d"}, {"kind": "Article", "id": "xfd8aec8d"}, {"kind": "Article", "id": "xf39cf939"}], "children": [{"path": "khan/test-prep/ap-art-history/south-east-se-asia/india-art/beliefs-made-visible-ii/", "id": "jl6S0wdeWk4", "title": "Beliefs made visible: Buddhist art in South Asia", "kind": "Video", "description": "Explore Buddhism through clips of significant sites in South Asia and interviews with members of the Bay Area South Asian community. Learn more about Buddhism on the Asian Art Museum's education website.", "slug": "beliefs-made-visible-ii"}, {"path": "khan/test-prep/ap-art-history/south-east-se-asia/india-art/aam-stupa/", "id": "NJsLHcL3Bvs", "title": "The stupa", "kind": "Video", "description": "A short documentary on the stupa, a hemispherical mound that represents the burial mound of the Buddha. Learn more about the stupa on\u00a0education.asianart.org.", "slug": "aam-stupa"}], "in_knowledge_map": false, "description": "", "node_slug": "india-art", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/south-east-se-asia/india-art", "extended_slug": "test-prep/ap-art-history/south-east-se-asia/india-art", "kind": "Topic", "slug": "india-art"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/south-east-se-asia/china-art/", "id": "china-art", "hide": false, "title": "China", "child_data": [{"kind": "Article", "id": "xe485fbda"}, {"kind": "Video", "id": "x3ac40a44"}, {"kind": "Article", "id": "x3cc9ae64"}, {"kind": "Article", "id": "x62877ea0"}, {"kind": "Video", "id": "xf2ed2c9b"}, {"kind": "Article", "id": "x253dfee8"}, {"kind": "Video", "id": "xabb669a1"}, {"kind": "Article", "id": "x8ae12421"}, {"kind": "Article", "id": "x0592bf39"}, {"kind": "Article", "id": "x8375da91"}, {"kind": "Article", "id": "x0dac1ca0"}, {"kind": "Video", "id": "x2dad7db1"}, {"kind": "Article", "id": "xbc629eb6"}], "children": [{"path": "khan/test-prep/ap-art-history/south-east-se-asia/china-art/mausoleum-of-the-first-qin-emperor-unescotbs/", "id": "Zuugb3qq0Zg", "title": "Terra cotta warriors from the Mausoleum of the First Qin Emperor (UNESCO/TBS)", "kind": "Video", "description": "No doubt thousands of statues still remain to be unearthed at this archaeological site, which was not discovered until 1974. Qin (d. 210 B.C.), the first unifier of China, is buried, surrounded by the famous terracotta warriors, at the centre of a complex designed to mirror the urban plan of the capital, Xianyan. The small figures are all different; with their horses, chariots and weapons, they are masterpieces of realism and also of great historical interest. Source: UNESCO TV / \u00a9 TBS Produced by TBS Supported by Sony URL: http://whc.unesco.org/en/list/441/", "slug": "mausoleum-of-the-first-qin-emperor-unescotbs"}, {"path": "khan/test-prep/ap-art-history/south-east-se-asia/china-art/longmen-grottoes-unesconhk/", "id": "kFp7D0UxNxU", "title": "Longmen Grottoes (UNESCO/NHK)", "kind": "Video", "description": "The grottoes and niches of Longmen contain the largest and most impressive collection of Chinese art of the late Northern Wei and Tang Dynasties (316-907). These works, entirely devoted to the Buddhist religion, represent the high point of Chinese stone carving.", "slug": "longmen-grottoes-unesconhk"}, {"path": "khan/test-prep/ap-art-history/south-east-se-asia/china-art/david-vases/", "id": "lfIHzumEghQ", "title": "The David Vases", "kind": "Video", "description": "The David Vases, 1351 (Yuan dynasty), porcelain, cobalt and clear glaze, 63.6 x 20.7 cm each, Jingdezhen, Jiangxi province, China (British Museum)\n\n\u00a0\n\nSpeakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "david-vases"}, {"path": "khan/test-prep/ap-art-history/south-east-se-asia/china-art/forbidden-city/", "id": "tPfYrmcfvYE", "title": "The Forbidden City", "kind": "Video", "description": "In 1420, in an effort to consolidate his control over the throne, the emperor of the Ming dynasty (1368\u20131644)\u00a0moved China's capital to a site in the North, now known as Bejing. There, he built a vast complex of palaces and administrative buildings now covering 178 acres. Because access was restricted to the imperial family and to those who had business with them, it came to be known as the Forbidden City. Learn more about the Ming dynasty (1368\u20131644) on the Asian Art Museum's education website.", "slug": "forbidden-city"}], "in_knowledge_map": false, "description": "", "node_slug": "china-art", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/south-east-se-asia/china-art", "extended_slug": "test-prep/ap-art-history/south-east-se-asia/china-art", "kind": "Topic", "slug": "china-art"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/south-east-se-asia/japan-art/", "id": "japan-art", "hide": false, "title": "Japan", "child_data": [{"kind": "Article", "id": "xdba80ce8"}, {"kind": "Video", "id": "x19839c69"}, {"kind": "Article", "id": "xa5e9a3d5"}], "children": [{"path": "khan/test-prep/ap-art-history/south-east-se-asia/japan-art/ancient-temples-nara/", "id": "r4rWWtSWf_k", "title": "Ancient temples of Nara Japan", "kind": "Video", "description": "Explore Nara's ancient Buddhist art and architecture. Learn more about Buddhism in Japan on the Asian Art Museum's education website.", "slug": "ancient-temples-nara"}], "in_knowledge_map": false, "description": "", "node_slug": "japan-art", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/south-east-se-asia/japan-art", "extended_slug": "test-prep/ap-art-history/south-east-se-asia/japan-art", "kind": "Topic", "slug": "japan-art"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/south-east-se-asia/cambodia-art/", "id": "cambodia-art", "hide": false, "title": "Cambodia", "child_data": [{"kind": "Article", "id": "x6f91791e"}, {"kind": "Video", "id": "xf1c3ae2f"}], "children": [{"path": "khan/test-prep/ap-art-history/south-east-se-asia/cambodia-art/angkor-temple-mountains/", "id": "fPc20_vtlaM", "title": "Angkor temple mountains", "kind": "Video", "description": "This video explores the ancient kingdom of Angkor , which was one of the most powerful states in Southeast Asia from the 800s to the 1300s. A succession of kings built huge temples that remain in Cambodia today as some of the world's greatest religious monuments. Learn more about artworks from Southeast Asia on education.asianart.org.", "slug": "angkor-temple-mountains"}], "in_knowledge_map": false, "description": "", "node_slug": "cambodia-art", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/south-east-se-asia/cambodia-art", "extended_slug": "test-prep/ap-art-history/south-east-se-asia/cambodia-art", "kind": "Topic", "slug": "cambodia-art"}], "in_knowledge_map": false, "description": "The arts of South, East, and Southeast Asia represent some of the world\u2019s oldest, most diverse, and most sophisticated visual traditions.", "node_slug": "south-east-se-asia", "render_type": "Topic", "topic_page_url": "/test-prep/ap-art-history/south-east-se-asia", "extended_slug": "test-prep/ap-art-history/south-east-se-asia", "kind": "Topic", "slug": "south-east-se-asia"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/the-pacific/", "id": "the-pacific", "hide": false, "title": "The Pacific", "child_data": [{"kind": "Article", "id": "x9eb73ff2"}, {"kind": "Article", "id": "x7fe89dcc"}, {"kind": "Article", "id": "xcf3edb5f"}, {"kind": "Article", "id": "xa1293b4c"}, {"kind": "Video", "id": "x969e685a"}, {"kind": "Article", "id": "xc5775f5a"}, {"kind": "Article", "id": "x0bcce91a"}, {"kind": "Article", "id": "xaeb6d097"}, {"kind": "Article", "id": "x29a35416"}], "children": [{"path": "khan/test-prep/ap-art-history/the-pacific/buk-torres/", "id": "3ntQz5vxFec", "title": "Mask (Buk), Torres Strait, Mabuiag Island", "kind": "Video", "description": "Mask (Buk), Torres Strait, Mabuiag Island, mid to late 19th century,turtle shell, wood, cassowary feathers, fiber, resin, shell, paint, 21 1/2 inches high (The Metropolitan Museum of Art) Speakers: Dr. Peri Klemm and Dr. Beth Harris", "slug": "buk-torres"}], "in_knowledge_map": false, "description": "The arts of the Pacific vary by virtue of ecological situations, social structure, and impact of external influences, such as commerce, colonialism, and missionary activity. Created in a variety of media, Pacific arts are distinguished by the virtuosity with which materials are used and presented.", "node_slug": "the-pacific", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/the-pacific", "extended_slug": "test-prep/ap-art-history/the-pacific", "kind": "Topic", "slug": "the-pacific"}, {"icon_src": "", "contains": ["Video"], "path": "khan/test-prep/ap-art-history/global-contemporary/", "id": "global-contemporary", "hide": false, "title": "Global contemporary: 1980-present", "child_data": [{"kind": "Article", "id": "x55dc6545"}, {"kind": "Video", "id": "x255f97b9"}, {"kind": "Article", "id": "x2438338a"}, {"kind": "Article", "id": "x6db98225"}, {"kind": "Video", "id": "x26f5f629"}, {"kind": "Article", "id": "xaa064a82"}, {"kind": "Article", "id": "xf1bd469b"}, {"kind": "Article", "id": "x21d17fa2"}, {"kind": "Article", "id": "x5b52dac5"}, {"kind": "Article", "id": "xf1d3bab4"}, {"kind": "Article", "id": "x4173aafa"}, {"kind": "Article", "id": "x671572f8"}, {"kind": "Article", "id": "x867a0c31"}, {"kind": "Article", "id": "xda1b2b95"}, {"kind": "Article", "id": "x9e3f0e96"}, {"kind": "Article", "id": "x59249327"}, {"kind": "Article", "id": "x9b46a4d8"}, {"kind": "Article", "id": "xdd69df3d"}, {"kind": "Article", "id": "x29a01587"}, {"kind": "Article", "id": "xc16438dd"}, {"kind": "Article", "id": "x489bbdd2"}, {"kind": "Article", "id": "x5cf8dd86"}, {"kind": "Video", "id": "xf8cabd80"}, {"kind": "Article", "id": "x381a8b5b"}, {"kind": "Video", "id": "x50190afe"}], "children": [{"path": "khan/test-prep/ap-art-history/global-contemporary/mayalin-vietnamvetmem/", "id": "wuxjTxxQUTs", "title": "Maya Lin, Vietnam Veterans Memorial", "kind": "Video", "description": "Maya Lin, Vietnam Veterans Memorial, 1982, granite, 2 acres\u00a0within\u00a0Constitution Gardens, (National Mall, Washington, D.C.),\u00a0speakers: Dr. Beth Harris and Dr. Steven Zucker", "slug": "mayalin-vietnamvetmem"}, {"path": "khan/test-prep/ap-art-history/global-contemporary/xubing-book/", "id": "DseIYQdjzgE", "title": "Xu Bing, Book from the Sky", "kind": "Video", "description": "Xu Bing, Book from the Sky, c. 1987-91, hand-printed books and ceiling and wall scrolls printed from wood letterpress type; ink on paper, each book, open: 18 1/8 \u00d7 20 inches / 46 \u00d7 51 cm; each of three ceiling scrolls 38 inches \u00d7 c. 114 feet 9-7/8 inches / 96.5 \u00d7 3500 cm; each wall scroll 9 feet 2-1/4 inches \u00d7 39-3/8 inches / 280 \u00d7 100 cm (installation at the Metropolitan Museum of Art, 2014), collection of the artist, \u00a9 Xu Bing\nSpeakers: Allison Young and Steven Zucker", "slug": "xubing-book"}, {"path": "khan/test-prep/ap-art-history/global-contemporary/hadid-maxxi/", "id": "Kv3feYibIUk", "title": "Zaha Hadid, MAXXI National Museum of XXI Century Arts, Rome", "kind": "Video", "description": "Zaha Hadid, MAXXI National Museum of XXI Century Arts,\u00a01998 -- 2009 (opened 2010), Via Guido Reni, Rome.\u00a0A conversation between Dr. Beth Harris and Dr. Steven Zucker", "slug": "hadid-maxxi"}, {"path": "khan/test-prep/ap-art-history/global-contemporary/ai-weiwei/", "id": "PueYywpkJW8", "title": "Ai Weiwei: Sunflower Seeds", "kind": "Video", "description": "This video brought to you by\u00a0Tate.org.uk\n\nIn the process of crafting millions of porcelain sunflower seeds, Chinese artist Ai WeiWei creates a work of art as well as a positive social project for the village in rural China he employed to make the seeds.\u00a0Follow Sunflower Seeds\u00a0on its remarkable journey from conception to delivery, and hear the artist talk about his unique socio-political approach to making art.", "slug": "ai-weiwei"}], "in_knowledge_map": false, "description": "Global contemporary art is characterized by a transcendence of traditional conceptions of art and is supported by technological developments and global awareness. Digital technology in particular provides increased access to imagery and contextual information about diverse artists and artworks throughout history and across the globe.", "node_slug": "global-contemporary", "render_type": "Tutorial", "topic_page_url": "/test-prep/ap-art-history/global-contemporary", "extended_slug": "test-prep/ap-art-history/global-contemporary", "kind": "Topic", "slug": "global-contemporary"}], "in_knowledge_map": false, "description": "Note: New materials are being added weekly. \n\nThe new AP* art history course will begin fall 2015. Smarthistory is working to include each of the 250 required works of art. The new test will assess a student\u2019s understanding of the methods used by art historians and familiarity with the cultural context in which a work of art was made and understood. Smarthistory\u2019s art history content is designed to teach these skills and to make the art engaging and accessible (and it\u2019s completely free!). Currently, more than 85% of the 250 monuments are discussed in the videos and essays included in this section. We are working to cover the remaining content before the 2015/16 course begins.\n__________________________________________\n* AP Art History is a registered trademark of the College Board, which was not involved in the production of, and does not endorse, this product.", "node_slug": "ap-art-history", "render_type": "Subject", "topic_page_url": "/test-prep/ap-art-history", "extended_slug": "test-prep/ap-art-history", "kind": "Topic", "slug": "ap-art-history"}], "in_knowledge_map": false, "description": "", "node_slug": "test-prep", "render_type": "Domain", "topic_page_url": "/test-prep", "extended_slug": "test-prep", "kind": "Topic", "slug": "test-prep"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/", "id": "partner-content", "hide": false, "title": "Partner content", "child_data": [{"kind": "Topic", "id": "x4c0cffdd"}, {"kind": "Topic", "id": "xebf99b63"}, {"kind": "Topic", "id": "x0d6c5f5b"}, {"kind": "Topic", "id": "xeb48c24e"}, {"kind": "Topic", "id": "xd45c6cf9"}, {"kind": "Topic", "id": "xd9c94318"}, {"kind": "Topic", "id": "x41337c2e"}, {"kind": "Topic", "id": "x1dd6613c"}, {"kind": "Topic", "id": "xc4e9b2d5"}, {"kind": "Topic", "id": "x5ed1079b"}, {"kind": "Topic", "id": "x0540a26a"}, {"kind": "Topic", "id": "xbb5b204c"}, {"kind": "Topic", "id": "xd226e27a"}, {"kind": "Topic", "id": "xf3c15d4e"}, {"kind": "Topic", "id": "xc579d153"}, {"kind": "Topic", "id": "xa24e7409"}, {"kind": "Topic", "id": "x9efc9f4b"}, {"kind": "Topic", "id": "xcde1a05f"}, {"kind": "Topic", "id": "x1b441846"}, {"kind": "Topic", "id": "x6aa3b8f3"}, {"kind": "Topic", "id": "x5d2ce072"}, {"kind": "Topic", "id": "x5f3ad844"}, {"kind": "Topic", "id": "xc737de2f"}, {"kind": "Topic", "id": "x81a3add8"}, {"kind": "Topic", "id": "xc46c4988"}, {"kind": "Topic", "id": "xaff557ce"}, {"kind": "Topic", "id": "x69ded3d3"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/", "id": "CAS-biodiversity", "hide": false, "title": "California Academy of Sciences", "child_data": [{"kind": "Topic", "id": "xb91c1e3a"}, {"kind": "Topic", "id": "x345d2860"}, {"kind": "Topic", "id": "xb1fc9124"}, {"kind": "Topic", "id": "x0066ce37"}, {"kind": "Topic", "id": "x8e37066c"}, {"kind": "Topic", "id": "x2a64372c"}, {"kind": "Topic", "id": "x4dd95405"}, {"kind": "Topic", "id": "x92861948"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/cas-biodiversity/cas-welcome/", "id": "cas-welcome", "hide": false, "title": "Welcome to the world of biodiversity!", "child_data": [{"kind": "Topic", "id": "xf5ed010a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/cas-biodiversity/cas-welcome/cal-academy-welcome/", "id": "cal-academy-welcome", "hide": false, "title": "Welcome", "child_data": [{"kind": "Article", "id": "x95871501"}, {"kind": "Video", "id": "x4dec0931"}], "children": [{"path": "khan/partner-content/cas-biodiversity/cas-welcome/cal-academy-welcome/california-academy-of-sciences/", "id": "HpDJBFflYKI", "title": "California Academy of Sciences", "kind": "Video", "slug": "california-academy-of-sciences"}], "in_knowledge_map": false, "description": "", "node_slug": "cal-academy-welcome", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/cas-welcome/cal-academy-welcome", "extended_slug": "partner-content/CAS-biodiversity/cas-welcome/cal-academy-welcome", "kind": "Topic", "slug": "cal-academy-welcome"}], "in_knowledge_map": false, "description": "Take an expedition with us to investigate the amazing diversity of life on this planet. Learn what biodiversity is, why it is important, where it is found, how it comes into existence, how you study it, why it is threatened, and how it can be protected.", "node_slug": "cas-welcome", "render_type": "Topic", "topic_page_url": "/partner-content/CAS-biodiversity/cas-welcome", "extended_slug": "partner-content/CAS-biodiversity/cas-welcome", "kind": "Topic", "slug": "cas-welcome"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-important-ca/", "id": "why-is-biodiversity-important-ca", "hide": false, "title": "Why is biodiversity important?", "child_data": [{"kind": "Topic", "id": "xa6f5240b"}, {"kind": "Topic", "id": "x89eab031"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-important-ca/biodiversity-and-ecosystem-funct/", "id": "biodiversity-and-ecosystem-funct", "hide": false, "title": "Biodiversity and ecosystem function", "child_data": [{"kind": "Video", "id": "x4baff49e"}, {"kind": "Article", "id": "x0516997a"}, {"kind": "Article", "id": "x1f940163"}, {"kind": "Exercise", "id": "x01a52adb"}, {"kind": "Article", "id": "x7ae212a9"}, {"kind": "Article", "id": "x93279a74"}, {"kind": "Article", "id": "x5671afe1"}, {"kind": "Article", "id": "xf343507f"}], "children": [{"path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-important-ca/biodiversity-and-ecosystem-funct/biodiversity-ecosystems-and-ecological-networks/", "id": "-bE-Pydad7U", "title": "Ecosystems and ecological networks", "kind": "Video", "slug": "biodiversity-ecosystems-and-ecological-networks"}, {"path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-important-ca/biodiversity-and-ecosystem-funct/cas-ecosystem-function/", "id": "cas-ecosystem-function", "title": "Test your knowledge: ecosystem function", "slug": "cas-ecosystem-function", "kind": "Exercise"}], "in_knowledge_map": false, "description": "A wealth and variety of species, or species richness, promote strong ecological networks and functions, making ecosystems more resilient to major disturbances and collapse.", "node_slug": "biodiversity-and-ecosystem-funct", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/why-is-biodiversity-important-ca/biodiversity-and-ecosystem-funct", "extended_slug": "partner-content/CAS-biodiversity/why-is-biodiversity-important-ca/biodiversity-and-ecosystem-funct", "kind": "Topic", "slug": "biodiversity-and-ecosystem-funct"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-important-ca/biodiversity-and-ecosystem-servi/", "id": "biodiversity-and-ecosystem-servi", "hide": false, "title": "Biodiversity and ecosystem services", "child_data": [{"kind": "Video", "id": "x1be8fe42"}, {"kind": "Exercise", "id": "x0464538a"}, {"kind": "Article", "id": "x7ea8f30c"}, {"kind": "Article", "id": "xe4e251dd"}, {"kind": "Article", "id": "x32b9845d"}, {"kind": "Article", "id": "x8e6e310a"}, {"kind": "Article", "id": "x298826b2"}], "children": [{"path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-important-ca/biodiversity-and-ecosystem-servi/ecosystem-services/", "id": "BCH1Gre3Mg0", "title": "Ecosystem services", "kind": "Video", "slug": "ecosystem-services"}, {"path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-important-ca/biodiversity-and-ecosystem-servi/cas-ecosystem-services/", "id": "cas-ecosystem-services", "title": "Test your knowledge: biodiversity and ecosystem services", "slug": "cas-ecosystem-services", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Healthy ecosystems provide crucial direct, indirect, and aesthetic-ethical benefits to humans.", "node_slug": "biodiversity-and-ecosystem-servi", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/why-is-biodiversity-important-ca/biodiversity-and-ecosystem-servi", "extended_slug": "partner-content/CAS-biodiversity/why-is-biodiversity-important-ca/biodiversity-and-ecosystem-servi", "kind": "Topic", "slug": "biodiversity-and-ecosystem-servi"}], "in_knowledge_map": false, "description": "Discover why a high diversity of species sustains ecosystems, which in turn provide important services to humans.", "node_slug": "why-is-biodiversity-important-ca", "render_type": "Topic", "topic_page_url": "/partner-content/CAS-biodiversity/why-is-biodiversity-important-ca", "extended_slug": "partner-content/CAS-biodiversity/why-is-biodiversity-important-ca", "kind": "Topic", "slug": "why-is-biodiversity-important-ca"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/", "id": "where-biodiversity-is-found", "hide": false, "title": "Where is biodiversity found?", "child_data": [{"kind": "Topic", "id": "x3c612950"}, {"kind": "Topic", "id": "x946cfefe"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/", "id": "biodiversity-hotspots-cas", "hide": false, "title": "Biodiversity Hotspots", "child_data": [{"kind": "Video", "id": "xe98900f2"}, {"kind": "Video", "id": "x53e439dc"}, {"kind": "Video", "id": "x7ef41986"}, {"kind": "Video", "id": "x9883b585"}, {"kind": "Video", "id": "x6fc9b103"}, {"kind": "Video", "id": "x450b6a4b"}, {"kind": "Video", "id": "xabd03d2c"}, {"kind": "Video", "id": "xb086c58c"}, {"kind": "Article", "id": "x36bd0aca"}, {"kind": "Exercise", "id": "xd1aa418d"}, {"kind": "Article", "id": "x620b6e3f"}, {"kind": "Article", "id": "xee82c97c"}, {"kind": "Article", "id": "x5ede5e53"}, {"kind": "Article", "id": "xdb53773c"}, {"kind": "Article", "id": "x5d75841b"}], "children": [{"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/biodiversity-hotspot/", "id": "RaQBaVeEbW8", "title": "What is a biodiversity hotspot?", "kind": "Video", "slug": "biodiversity-hotspot"}, {"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/biodiversity-hotspot-case-study-california/", "id": "q9W0Uqi4Y58", "title": "Biodiversity hotspot case study: California", "kind": "Video", "slug": "biodiversity-hotspot-case-study-california"}, {"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/biodiveristy-hotspot-case-study-galapagos/", "id": "WihqEIIFQMk", "title": "Biodiversity hotspot case study: Galapagos", "kind": "Video", "slug": "biodiveristy-hotspot-case-study-galapagos"}, {"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/hotspot-case-study-gaoligongshan/", "id": "_ikPWdEFqFs", "title": "Biodiversity hotspot case study: Gaoligongshan", "kind": "Video", "slug": "hotspot-case-study-gaoligongshan"}, {"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/biodiversity-hotspot-case-study-madagascar/", "id": "cTNnkbKoxgw", "title": "Biodiversity hotspot case study: Madagascar", "kind": "Video", "slug": "biodiversity-hotspot-case-study-madagascar"}, {"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/hotspot-case-study-mesoamerica/", "id": "l4hMDy_JMEQ", "title": "Biodiversity hotspot case study: Mesoamerica", "kind": "Video", "slug": "hotspot-case-study-mesoamerica"}, {"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/hotspot-case-study-philipines/", "id": "PrsWs8Pmjao", "title": "Biodiversity hotspot case study: Philippines", "kind": "Video", "slug": "hotspot-case-study-philipines"}, {"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/biodiversity-hotspot-sao-tome/", "id": "gGEP_PjLjw4", "title": "Biodiversity hotspot case study: Sao Tom\u00e9", "kind": "Video", "slug": "biodiversity-hotspot-sao-tome"}, {"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas/cas-hotspots/", "id": "cas-hotspots", "title": "Test your knowledge: biodiversity hotspots", "slug": "cas-hotspots", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Areas that have a high diversity of unique and threatened species are known as biodiversity hotspots.", "node_slug": "biodiversity-hotspots-cas", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas", "extended_slug": "partner-content/CAS-biodiversity/where-biodiversity-is-found/biodiversity-hotspots-cas", "kind": "Topic", "slug": "biodiversity-hotspots-cas"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/distribution-patterns/", "id": "distribution-patterns", "hide": false, "title": "Biodiversity distribution patterns", "child_data": [{"kind": "Video", "id": "x427d430d"}, {"kind": "Video", "id": "xb482835e"}, {"kind": "Article", "id": "x2b2202a4"}, {"kind": "Article", "id": "x86eb17cb"}, {"kind": "Exercise", "id": "x0cbffb1b"}, {"kind": "Article", "id": "xb3849826"}, {"kind": "Article", "id": "x2531ffd2"}, {"kind": "Article", "id": "xf912c662"}, {"kind": "Article", "id": "x5989e845"}, {"kind": "Article", "id": "xb6025492"}], "children": [{"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/distribution-patterns/distribution-how/", "id": "BTOHSRVqN20", "title": "How biodiversity is distributed globally", "kind": "Video", "description": "How biodiversity is distributed globally", "slug": "distribution-how"}, {"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/distribution-patterns/distributionwhy/", "id": "3OAfLjxQUg4", "title": "Why biodiversity is distributed unevenly", "kind": "Video", "description": "Why is biodiversity distributed unevenly?", "slug": "distributionwhy"}, {"path": "khan/partner-content/cas-biodiversity/where-biodiversity-is-found/distribution-patterns/biodiversity-distribution-patterns/", "id": "biodiversity-distribution-patterns", "title": "Test your knowledge: biodiversity distribution patterns", "slug": "biodiversity-distribution-patterns", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Life is abundant on Earth, but is distributed unevenly, with species richness and population sizes greater in some areas than others. The physical environment, other organisms, evolutionary factors, and human actions all influence where species live.", "node_slug": "distribution-patterns", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/where-biodiversity-is-found/distribution-patterns", "extended_slug": "partner-content/CAS-biodiversity/where-biodiversity-is-found/distribution-patterns", "kind": "Topic", "slug": "distribution-patterns"}], "in_knowledge_map": false, "description": "Explore how life is found almost everywhere on Earth, but is not distributed evenly. And learn why the clumped distributions of species are the result of a wide variety of both natural and human-driven factors.", "node_slug": "where-biodiversity-is-found", "render_type": "Topic", "topic_page_url": "/partner-content/CAS-biodiversity/where-biodiversity-is-found", "extended_slug": "partner-content/CAS-biodiversity/where-biodiversity-is-found", "kind": "Topic", "slug": "where-biodiversity-is-found"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/", "id": "How-is-biodiversity-studied", "hide": false, "title": "How is biodiversity studied?", "child_data": [{"kind": "Topic", "id": "x65f30a37"}, {"kind": "Topic", "id": "x5b6ca905"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/biodiversity-fieldwork/", "id": "biodiversity-fieldwork", "hide": false, "title": "Biodiversity fieldwork", "child_data": [{"kind": "Video", "id": "x8bf00bb3"}, {"kind": "Video", "id": "x5c853bb5"}, {"kind": "Article", "id": "x0c32b8bb"}, {"kind": "Exercise", "id": "xc5319211"}, {"kind": "Article", "id": "x83497782"}, {"kind": "Article", "id": "xdd4297ff"}, {"kind": "Article", "id": "xdce8b7a8"}, {"kind": "Article", "id": "x053f5b8a"}, {"kind": "Article", "id": "xc80f0568"}], "children": [{"path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/biodiversity-fieldwork/biodiversity-expeditions/", "id": "4krPhLDbU5M", "title": "Biodiversity Expeditions Past and Present", "kind": "Video", "slug": "biodiversity-expeditions"}, {"path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/biodiversity-fieldwork/biodiversity-expeditions-field-methods/", "id": "cdxMX-gajac", "title": "Field Methods for Documenting Biodiversity", "kind": "Video", "slug": "biodiversity-expeditions-field-methods"}, {"path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/biodiversity-fieldwork/test-your-knowledge-of-biodiversity-fieldwork/", "id": "test-your-knowledge-of-biodiversity-fieldwork", "title": "Test your knowledge: biodiversity fieldwork", "slug": "test-your-knowledge-of-biodiversity-fieldwork", "kind": "Exercise"}], "in_knowledge_map": false, "description": "For centuries, expeditions to discover biodiversity have taken scientists to the far corners of the planet. Today\u2019s expeditions are multidisciplinary, incorporate new technologies and involve new ethics.", "node_slug": "biodiversity-fieldwork", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/How-is-biodiversity-studied/biodiversity-fieldwork", "extended_slug": "partner-content/CAS-biodiversity/How-is-biodiversity-studied/biodiversity-fieldwork", "kind": "Topic", "slug": "biodiversity-fieldwork"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/biodiversity-analyses-and-uncertainties/", "id": "biodiversity-analyses-and-uncertainties", "hide": false, "title": "Biodiversity analyses and unknowns", "child_data": [{"kind": "Video", "id": "xc340a393"}, {"kind": "Video", "id": "x214050e1"}, {"kind": "Article", "id": "x603f12c6"}, {"kind": "Exercise", "id": "x233810d1"}, {"kind": "Article", "id": "x5b58bce2"}, {"kind": "Article", "id": "x81b14a1c"}, {"kind": "Article", "id": "xe1a2f2cd"}, {"kind": "Article", "id": "x4d86f8df"}, {"kind": "Article", "id": "x4bf9abb1"}], "children": [{"path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/biodiversity-analyses-and-uncertainties/studying-biodiversity-in-the-lab/", "id": "lqUEWp-D3IM", "title": "Studying biodiversity in the lab", "kind": "Video", "slug": "studying-biodiversity-in-the-lab"}, {"path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/biodiversity-analyses-and-uncertainties/how-much-biodiversity-do-we-really-know/", "id": "LDDKjQ-0jss", "title": "How much biodiversity do we really know?", "kind": "Video", "slug": "how-much-biodiversity-do-we-really-know"}, {"path": "khan/partner-content/cas-biodiversity/how-is-biodiversity-studied/biodiversity-analyses-and-uncertainties/test-your-knowledge-of-biodiversity-analyses-and-unknowns/", "id": "test-your-knowledge-of-biodiversity-analyses-and-unknowns", "title": "Test your knowledge: biodiversity analyses and unknowns", "description": "Test your knowledge of biodiversity analyses and unknowns", "slug": "test-your-knowledge-of-biodiversity-analyses-and-unknowns", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Collecting specimens in the field launches the lab work of analysis, documentation, and cataloging. Despite the ongoing work of scientists, only about 10% of Earth\u2019s biodiversity has been documented.", "node_slug": "biodiversity-analyses-and-uncertainties", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/How-is-biodiversity-studied/biodiversity-analyses-and-uncertainties", "extended_slug": "partner-content/CAS-biodiversity/How-is-biodiversity-studied/biodiversity-analyses-and-uncertainties", "kind": "Topic", "slug": "biodiversity-analyses-and-uncertainties"}], "in_knowledge_map": false, "description": "Delve into the history of humanity\u2019s passion to document and display specimens from the natural world and learn how biodiversity expeditions are conducted today.", "node_slug": "How-is-biodiversity-studied", "render_type": "Topic", "topic_page_url": "/partner-content/CAS-biodiversity/How-is-biodiversity-studied", "extended_slug": "partner-content/CAS-biodiversity/How-is-biodiversity-studied", "kind": "Topic", "slug": "how-is-biodiversity-studied"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/", "id": "why-is-biodiversity-threatened", "hide": false, "title": "Why is biodiversity threatened?", "child_data": [{"kind": "Topic", "id": "x56dff66f"}, {"kind": "Topic", "id": "x2fec78ab"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/local-threats-to-biodiversity/", "id": "local-threats-to-biodiversity", "hide": false, "title": "Local threats to biodiversity", "child_data": [{"kind": "Video", "id": "xd1385475"}, {"kind": "Video", "id": "x96adeb74"}, {"kind": "Exercise", "id": "xb86f615f"}, {"kind": "Article", "id": "x8788062e"}, {"kind": "Article", "id": "xe147d8c1"}, {"kind": "Article", "id": "x2aa37420"}, {"kind": "Article", "id": "xc71a4382"}], "children": [{"path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/local-threats-to-biodiversity/human-activities-that-threaten-biodiversity/", "id": "2RC3Hsk90t8", "title": "Human activities that threaten biodiversity", "kind": "Video", "slug": "human-activities-that-threaten-biodiversity"}, {"path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/local-threats-to-biodiversity/introduced-species-and-biodiversity/", "id": "J-ftiWffNTc", "title": "Introduced species and biodiversity", "kind": "Video", "slug": "introduced-species-and-biodiversity"}, {"path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/local-threats-to-biodiversity/test-your-knowledge-of-local-threats-to-biodiversity/", "id": "test-your-knowledge-of-local-threats-to-biodiversity", "title": "Test your knowledge: local threats to biodiversity", "description": "Test your knowledge of local threats to biodiversity", "slug": "test-your-knowledge-of-local-threats-to-biodiversity", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Human population increase and activities threaten biodiversity in almost every corner of our planet. Local threats to species richness include land-use changes, pollution, resource exploitation, and invasive species.", "node_slug": "local-threats-to-biodiversity", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/why-is-biodiversity-threatened/local-threats-to-biodiversity", "extended_slug": "partner-content/CAS-biodiversity/why-is-biodiversity-threatened/local-threats-to-biodiversity", "kind": "Topic", "slug": "local-threats-to-biodiversity"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/biodiversity-global/", "id": "biodiversity-global", "hide": false, "title": "Global threats to biodiversity", "child_data": [{"kind": "Video", "id": "x3f29eda1"}, {"kind": "Video", "id": "xa74094f2"}, {"kind": "Exercise", "id": "x5f993676"}, {"kind": "Article", "id": "x028f9d94"}, {"kind": "Article", "id": "x6cf62069"}, {"kind": "Article", "id": "x7dce8cc8"}, {"kind": "Article", "id": "x6a3f618a"}], "children": [{"path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/biodiversity-global/how-does-climate-change-affect-biodiversity/", "id": "XFmovUAWQUQ", "title": "How does climate change affect biodiversity?", "kind": "Video", "slug": "how-does-climate-change-affect-biodiversity"}, {"path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/biodiversity-global/ocean-acidification-and-biodiversity-impacts/", "id": "GL7qJYKzcsk", "title": "Demystifying ocean acidification and biodiversity impacts", "kind": "Video", "slug": "ocean-acidification-and-biodiversity-impacts"}, {"path": "khan/partner-content/cas-biodiversity/why-is-biodiversity-threatened/biodiversity-global/test-your-knowledge-of-global-threats-to-biodiversity/", "id": "test-your-knowledge-of-global-threats-to-biodiversity", "title": "Test your knowledge: global threats to biodiversity", "description": "Test your knowledge of global threats to biodiversity", "slug": "test-your-knowledge-of-global-threats-to-biodiversity", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Local impacts can have global consequences. Humans are causing accelerating changes in the atmosphere, on land, and in the oceans. Life in these changing environments is tough for many species.", "node_slug": "biodiversity-global", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/why-is-biodiversity-threatened/biodiversity-global", "extended_slug": "partner-content/CAS-biodiversity/why-is-biodiversity-threatened/biodiversity-global", "kind": "Topic", "slug": "biodiversity-global"}], "in_knowledge_map": false, "description": "Examine the local and global threats to biodiversity that are caused by human activities. Many of the negative impacts start as regional, but easily add up to affect the entire planet.", "node_slug": "why-is-biodiversity-threatened", "render_type": "Topic", "topic_page_url": "/partner-content/CAS-biodiversity/why-is-biodiversity-threatened", "extended_slug": "partner-content/CAS-biodiversity/why-is-biodiversity-threatened", "kind": "Topic", "slug": "why-is-biodiversity-threatened"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/biodiversity-protection/", "id": "biodiversity-protection", "hide": false, "title": "How can biodiversity be protected?", "child_data": [{"kind": "Topic", "id": "xd34209c8"}, {"kind": "Topic", "id": "x32ff7968"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/biodiversity-protection/science-education/", "id": "science-education", "hide": false, "title": "Harnessing science and education for biodiversity conservation", "child_data": [{"kind": "Video", "id": "xfdf860aa"}, {"kind": "Video", "id": "x34bb666c"}, {"kind": "Exercise", "id": "xb422b9f8"}, {"kind": "Article", "id": "x3a4eb9c9"}, {"kind": "Article", "id": "x614eec54"}, {"kind": "Article", "id": "xb9568206"}, {"kind": "Article", "id": "xf2443af5"}, {"kind": "Article", "id": "x43876638"}], "children": [{"path": "khan/partner-content/cas-biodiversity/biodiversity-protection/science-education/science-and-education-join-forces-to-protect-biodiversity/", "id": "WlLFmm6xm6A", "title": "Science and education join forces to protect biodiversity", "kind": "Video", "slug": "science-and-education-join-forces-to-protect-biodiversity"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-protection/science-education/conservation-and-the-race-to-save-biodiversity/", "id": "-u8xi7KFHY4", "title": "Conservation and the race to save biodiversity", "kind": "Video", "slug": "conservation-and-the-race-to-save-biodiversity"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-protection/science-education/test-your-knowledge-harnessing-science-and-education-for-biodiversity-conservation-/", "id": "test-your-knowledge--harnessing-science-and-education-for-biodiversity-conservation-", "title": "Test your knowledge: harnessing science and education for biodiversity conservation", "description": "Test your knowledge: harnessing science and education for biodiversity conservation", "slug": "test-your-knowledge-harnessing-science-and-education-for-biodiversity-conservation-", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We are changing global environments and losing biodiversity at unprecedented rates. Our greatest tool for stemming that loss is the symbiosis between science and education.", "node_slug": "science-education", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/biodiversity-protection/science-education", "extended_slug": "partner-content/CAS-biodiversity/biodiversity-protection/science-education", "kind": "Topic", "slug": "science-education"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/biodiversity-protection/biodiversitychampions/", "id": "Biodiversitychampions", "hide": false, "title": "Biodiversity champions", "child_data": [{"kind": "Video", "id": "xa0b8415e"}, {"kind": "Video", "id": "x46fd888f"}, {"kind": "Exercise", "id": "x4cfdc85d"}, {"kind": "Article", "id": "xe13ac355"}, {"kind": "Article", "id": "x16e134f6"}, {"kind": "Article", "id": "x1b686755"}, {"kind": "Article", "id": "xca10830a"}, {"kind": "Article", "id": "xf947b61d"}], "children": [{"path": "khan/partner-content/cas-biodiversity/biodiversity-protection/biodiversitychampions/protecting-biodiversity-the-power-of-the-individual/", "id": "PxAHbuyBvBY", "title": "Protecting biodiversity: the power of the individual", "kind": "Video", "slug": "protecting-biodiversity-the-power-of-the-individual"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-protection/biodiversitychampions/protecting-biodiversity-local-and-global-policies/", "id": "mXsFQONwIic", "title": "Protecting biodiversity: local and global policies", "kind": "Video", "slug": "protecting-biodiversity-local-and-global-policies"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-protection/biodiversitychampions/test-your-knowledge-of-biodiversity-champions/", "id": "test-your-knowledge-of-biodiversity-champions", "title": "Test your knowledge: biodiversity champions", "description": "Test your\u00a0knowledge of biodiversity champions", "slug": "test-your-knowledge-of-biodiversity-champions", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Advocates for biodiversity conservation come in all forms, from single individuals to international agencies.", "node_slug": "Biodiversitychampions", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/biodiversity-protection/Biodiversitychampions", "extended_slug": "partner-content/CAS-biodiversity/biodiversity-protection/Biodiversitychampions", "kind": "Topic", "slug": "biodiversitychampions"}], "in_knowledge_map": false, "description": "Discover the wealth of options available in the vital race to protect biodiversity.", "node_slug": "biodiversity-protection", "render_type": "Topic", "topic_page_url": "/partner-content/CAS-biodiversity/biodiversity-protection", "extended_slug": "partner-content/CAS-biodiversity/biodiversity-protection", "kind": "Topic", "slug": "biodiversity-protection"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/biodiversity-origin/", "id": "biodiversity-origin", "hide": false, "title": "Where does biodiversity come from?", "child_data": [{"kind": "Topic", "id": "x3acc3aa5"}, {"kind": "Topic", "id": "x29342a8f"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/biodiversity-origin/evolutionary-causes/", "id": "evolutionary-causes", "hide": false, "title": "The evolutionary causes of biodiversity", "child_data": [{"kind": "Video", "id": "x29f3228a"}, {"kind": "Video", "id": "x92bc392c"}, {"kind": "Exercise", "id": "xd046f284"}, {"kind": "Article", "id": "x5ffb6086"}, {"kind": "Article", "id": "xcbcbada6"}, {"kind": "Article", "id": "x323fa7b5"}, {"kind": "Article", "id": "xa45bfac8"}, {"kind": "Article", "id": "xc55877be"}], "children": [{"path": "khan/partner-content/cas-biodiversity/biodiversity-origin/evolutionary-causes/biodiversity-and-natural-selection-two/", "id": "sNgsCT0E7Es", "title": "Biodiversity and natural selection", "kind": "Video", "slug": "biodiversity-and-natural-selection-two"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-origin/evolutionary-causes/genetic-variation-gene-flow-and-new-species/", "id": "11iYk0Yrx3g", "title": "Genetic variation, gene flow, and new species", "kind": "Video", "slug": "genetic-variation-gene-flow-and-new-species"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-origin/evolutionary-causes/test-your-knowledge-the-evolutionary-causes-of-biodiversity/", "id": "test-your-knowledge--the-evolutionary-causes-of-biodiversity", "title": "Test your knowledge: the evolutionary causes of biodiversity", "description": "Test your knowledge: the evolutionary causes of biodiversity", "slug": "test-your-knowledge-the-evolutionary-causes-of-biodiversity", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Environmental conditions play a critical role in determining if an individual will survive and contribute its genetic information to the next generation and how new species will evolve.", "node_slug": "evolutionary-causes", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/biodiversity-origin/evolutionary-causes", "extended_slug": "partner-content/CAS-biodiversity/biodiversity-origin/evolutionary-causes", "kind": "Topic", "slug": "evolutionary-causes"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/biodiversity-origin/speciation-extinction/", "id": "speciation-extinction", "hide": false, "title": "Biodiversity patterns of speciation and extinction", "child_data": [{"kind": "Video", "id": "xee15c10e"}, {"kind": "Video", "id": "x778c92a4"}, {"kind": "Exercise", "id": "x83b1b9bf"}, {"kind": "Article", "id": "xc5c99bcf"}, {"kind": "Article", "id": "x47da88f4"}, {"kind": "Article", "id": "x45604c62"}], "children": [{"path": "khan/partner-content/cas-biodiversity/biodiversity-origin/speciation-extinction/new-localities-lead-to-new-biodiversity/", "id": "ACxH7ZVUOLk", "title": "New localities lead to new biodiversity", "kind": "Video", "slug": "new-localities-lead-to-new-biodiversity"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-origin/speciation-extinction/biodiversity-and-extinction-then-and-now/", "id": "v8PPsI0LqOY", "title": "Biodiversity and extinction, then and now", "kind": "Video", "slug": "biodiversity-and-extinction-then-and-now"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-origin/speciation-extinction/test-your-knowledge-biodiversity-patterns-of-speciation-and-extinction/", "id": "test-your-knowledge--biodiversity-patterns-of-speciation-and-extinction", "title": "Test your knowledge: biodiversity patterns of speciation and extinction", "description": "Test Your Knowledge", "slug": "test-your-knowledge-biodiversity-patterns-of-speciation-and-extinction", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Over time, species richness has had significant ups and downs. Speciation increases the number of species. Extinction decreases richness.", "node_slug": "speciation-extinction", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/biodiversity-origin/speciation-extinction", "extended_slug": "partner-content/CAS-biodiversity/biodiversity-origin/speciation-extinction", "kind": "Topic", "slug": "speciation-extinction"}], "in_knowledge_map": false, "description": "Earth's amazing diversity of life is the result of billions of years of evolution, of natural selection acting on individual genetic variation.", "node_slug": "biodiversity-origin", "render_type": "Topic", "topic_page_url": "/partner-content/CAS-biodiversity/biodiversity-origin", "extended_slug": "partner-content/CAS-biodiversity/biodiversity-origin", "kind": "Topic", "slug": "biodiversity-origin"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/biodiversity-levels/", "id": "biodiversity-levels", "hide": false, "title": "What are the different levels of biodiversity?", "child_data": [{"kind": "Topic", "id": "x45d0780d"}, {"kind": "Topic", "id": "x27ce5cb1"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/biodiversity-levels/genetic/", "id": "genetic", "hide": false, "title": "Genetic and ecosystem biodiversity", "child_data": [{"kind": "Video", "id": "x79f3cdca"}, {"kind": "Video", "id": "x11780233"}, {"kind": "Article", "id": "x9feae6d7"}, {"kind": "Exercise", "id": "x8f5d1278"}, {"kind": "Article", "id": "x4dde9037"}, {"kind": "Article", "id": "xfd09516b"}, {"kind": "Article", "id": "x1be828e2"}, {"kind": "Article", "id": "xdc512343"}, {"kind": "Article", "id": "xad3d0757"}], "children": [{"path": "khan/partner-content/cas-biodiversity/biodiversity-levels/genetic/genes-and-biodiversity/", "id": "XOxsjdB4-ZQ", "title": "Genes and biodiversity", "kind": "Video", "description": "How does the gene pool contribute to biodiversity? Learn how\u00a0genetic diversity within populations contributes to species survival.", "slug": "genes-and-biodiversity"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-levels/genetic/ecosystem-biodiversity/", "id": "ixf33dQDlXc", "title": "Ecosystem biodiversity", "kind": "Video", "description": "Are all coral reefs the same?\u00a0 Each regional ecosystem has its own\u00a0assemblage of species and each contributes uniquely to global\u00a0biodiversity. Explore why ecosystem diversity is important for\u00a0conservation decisions.", "slug": "ecosystem-biodiversity"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-levels/genetic/test-your-knowledge-genetic-and-ecosystem-biodiversity/", "id": "test-your-knowledge--genetic-and-ecosystem-biodiversity", "title": "Test your knowledge: genetic and ecosystem biodiversity", "description": "Test your Knowledge", "slug": "test-your-knowledge-genetic-and-ecosystem-biodiversity", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Diversity is important at the level of genes and ecosystems, as well as species.", "node_slug": "genetic", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/biodiversity-levels/genetic", "extended_slug": "partner-content/CAS-biodiversity/biodiversity-levels/genetic", "kind": "Topic", "slug": "genetic"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/cas-biodiversity/biodiversity-levels/biodiversity-tree-of-life/", "id": "biodiversity-tree-of-life", "hide": false, "title": "Biodiversity and the tree of life", "child_data": [{"kind": "Video", "id": "xd6f10a27"}, {"kind": "Video", "id": "x3f4b2e63"}, {"kind": "Article", "id": "x172a44ef"}, {"kind": "Exercise", "id": "x925f69ee"}, {"kind": "Article", "id": "x535d6e92"}, {"kind": "Article", "id": "x2183d737"}, {"kind": "Article", "id": "x05819a92"}, {"kind": "Article", "id": "x43533e64"}], "children": [{"path": "khan/partner-content/cas-biodiversity/biodiversity-levels/biodiversity-tree-of-life/discovering-the-tree-of-life/", "id": "AjvLQJ6PIiU", "title": "Discovering the tree of life", "kind": "Video", "slug": "discovering-the-tree-of-life"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-levels/biodiversity-tree-of-life/understanding-the-past-to-preserve-the-future/", "id": "s91Dptx52GU", "title": "Understanding the past to preserve the future", "kind": "Video", "slug": "understanding-the-past-to-preserve-the-future"}, {"path": "khan/partner-content/cas-biodiversity/biodiversity-levels/biodiversity-tree-of-life/test-your-knowledge-biodiversity-and-the-tree-of-life/", "id": "test-your-knowledge--biodiversity-and-the-tree-of-life", "title": "Test your knowledge: biodiversity and the tree of life", "description": "Test your knowledge: biodiversity and the tree of life", "slug": "test-your-knowledge-biodiversity-and-the-tree-of-life", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Understanding the place of every species in the tree of life is crucial in our race to save biodiversity. See how the history of a species can be traced through evolutionary trees.", "node_slug": "biodiversity-tree-of-life", "render_type": "Tutorial", "topic_page_url": "/partner-content/CAS-biodiversity/biodiversity-levels/biodiversity-tree-of-life", "extended_slug": "partner-content/CAS-biodiversity/biodiversity-levels/biodiversity-tree-of-life", "kind": "Topic", "slug": "biodiversity-tree-of-life"}], "in_knowledge_map": false, "description": "Learn how to recognize the genetic, ecosystem, and evolutionary levels of biodiversity. Along with species richness, these levels play crucial roles in conservation.", "node_slug": "biodiversity-levels", "render_type": "Topic", "topic_page_url": "/partner-content/CAS-biodiversity/biodiversity-levels", "extended_slug": "partner-content/CAS-biodiversity/biodiversity-levels", "kind": "Topic", "slug": "biodiversity-levels"}], "in_knowledge_map": false, "description": "The California Academy of Sciences is a renowned scientific and educational institution with a mission to explore, explain, and sustain life. Based in San Francisco, it is home to an aquarium, planetarium and natural history museum as well as innovative scientific research and education programs all under one living roof. The Academy is also home to nearly 46 million scientific specimens from around the world; essential tools for comparative studies on the history and future of life on Earth. The Academy\u2019s Biodiversity Course encourages students of all ages to explore the natural world and become active stewards of the environment and is supported by the Global Environmental Literacy Initiative, with major funding provided by the Pisces Foundation.", "node_slug": "CAS-biodiversity", "render_type": "Subject", "topic_page_url": "/partner-content/CAS-biodiversity", "extended_slug": "partner-content/CAS-biodiversity", "kind": "Topic", "slug": "cas-biodiversity"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/exploratorium/", "id": "Exploratorium", "hide": false, "title": "Exploratorium", "child_data": [{"kind": "Topic", "id": "x9c4101b1"}, {"kind": "Topic", "id": "xec3d19ee"}, {"kind": "Topic", "id": "xf0eac077"}, {"kind": "Topic", "id": "x94823f9c"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/exploratorium/sound-explo/", "id": "sound-explo", "hide": false, "title": "Sound", "child_data": [{"kind": "Topic", "id": "x0b314855"}, {"kind": "Topic", "id": "xac807348"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/exploratorium/sound-explo/vocal-visualizer/", "id": "vocal-visualizer", "hide": false, "title": "Vocal Visualizer", "child_data": [{"kind": "Video", "id": "xd187cdba"}, {"kind": "Video", "id": "xc2e29a9f"}, {"kind": "Video", "id": "xa8f993fb"}, {"kind": "Video", "id": "x28c7f60a"}, {"kind": "Article", "id": "x6267499d"}], "children": [{"path": "khan/partner-content/exploratorium/sound-explo/vocal-visualizer/vocal-visualizer-introduction/", "id": "NBxUKzOHFF0", "title": "Vocal Visualizer: Introduction", "kind": "Video", "description": "Use your voice to transform laser light into dazzling shapes and patterns.", "slug": "vocal-visualizer-introduction"}, {"path": "khan/partner-content/exploratorium/sound-explo/vocal-visualizer/vocal-visualizer-tools-and-assembly/", "id": "JVwp1m3wzvY", "title": "Build your own Vocal Visualizer: Materials, tools, and steps", "kind": "Video", "description": "In this video, you'll find the materials and tools you'll need to build your own Vocal Visualizer, as well as all the necessary steps.", "slug": "vocal-visualizer-tools-and-assembly"}, {"path": "khan/partner-content/exploratorium/sound-explo/vocal-visualizer/vocal-visualizer-whats-going-on/", "id": "JLTde8PxhQ8", "title": "What\u2019s going on: Transforming vibrating air molecules into patterns you can see", "kind": "Video", "description": "What\u2019s the science? This activity transforms the vibrating air molecules from your voice into Lissajous patterns, allowing you to visualize harmonic motions and resonant vibration modes.", "slug": "vocal-visualizer-whats-going-on"}, {"path": "khan/partner-content/exploratorium/sound-explo/vocal-visualizer/vocal-visualizer-challenge/", "id": "2zDhafJ2wqQ", "title": "Challenge: Get loud!", "kind": "Video", "description": "For a bigger and better light show, try experimenting with amplitude, frequency, and even the source of the sound (try your favorite song). Add in a friend and you\u2019ve now got a dueling laser-light show!", "slug": "vocal-visualizer-challenge"}], "in_knowledge_map": false, "description": "Croon a tune, croak like a frog, hum, hoot, or holler\u2014you don\u2019t need to be Pavarotti to transform laser light into dazzling shapes and patterns with the power of your voice. By humming, singing, or talking into the Vocal Visualizer\u2014also known as a simple sound oscilloscope\u2014you\u2019ll be able to see sound as vibration, and create a variety of cool laser light patterns that are reflected onto a wall or any other flat surface.", "node_slug": "vocal-visualizer", "render_type": "Tutorial", "topic_page_url": "/partner-content/Exploratorium/sound-explo/vocal-visualizer", "extended_slug": "partner-content/Exploratorium/sound-explo/vocal-visualizer", "kind": "Topic", "slug": "vocal-visualizer"}], "in_knowledge_map": false, "description": "When vibrating waves of air meet the elegantly designed human ear, we hear beautiful music, babies crying, wind whistling, and more. Explore these activities to learn more about how and what we hear.", "node_slug": "sound-explo", "render_type": "Topic", "topic_page_url": "/partner-content/Exploratorium/sound-explo", "extended_slug": "partner-content/Exploratorium/sound-explo", "kind": "Topic", "slug": "sound-explo"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/exploratorium/light-and-color/", "id": "light-and-color", "hide": false, "title": "Light and color", "child_data": [{"kind": "Topic", "id": "x231f18f9"}, {"kind": "Topic", "id": "x9d86344c"}, {"kind": "Topic", "id": "x56fd3fc6"}, {"kind": "Topic", "id": "xf2f1cbb3"}, {"kind": "Topic", "id": "xa1a1dfb0"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/exploratorium/light-and-color/cd-spectroscope/", "id": "cd-spectroscope", "hide": false, "title": "CD Spectroscope", "child_data": [{"kind": "Video", "id": "x5bdcced0"}, {"kind": "Video", "id": "xdd227705"}, {"kind": "Video", "id": "x21821abd"}, {"kind": "Video", "id": "x40fb57b7"}, {"kind": "Article", "id": "x3265c357"}], "children": [{"path": "khan/partner-content/exploratorium/light-and-color/cd-spectroscope/cd-spectroscope-introduction/", "id": "IqgxqkkptKQ", "title": "Introduction: Turn an old CD into a spectroscope to analyze light and color", "kind": "Video", "description": "Will the real white light please stand up? Two light sources that appear the same to your eye may actually be made up of different wavelengths of light.\u00a0In this science snack activity, Paul Doherty of the Exploratorium Teacher Institute introduces a simple device called a\u00a0CD spectroscope\u00a0that\u00a0will help you discover\u00a0the truth behind the light you see.", "slug": "cd-spectroscope-introduction"}, {"path": "khan/partner-content/exploratorium/light-and-color/cd-spectroscope/cd-spectroscope-build/", "id": "1iWdTbXvHx0", "title": "Build your own CD spectroscope: Materials, tools, and steps", "kind": "Video", "description": "Learn\u00a0how to make a\u00a0simple\u2014but effective\u2014spectroscope out of an old CD and a cardboard tube.", "slug": "cd-spectroscope-build"}, {"path": "khan/partner-content/exploratorium/light-and-color/cd-spectroscope/cd-spectroscope-explained/", "id": "1s6G4iCiIHA", "title": "To do and notice: See the true colors", "kind": "Video", "description": "Point your CD spectroscope at different light sources to see their true colors! You might even get lucky and reveal some Fraunhofer lines (read the complete activity guide for more information).\u00a0Safety note: never point your CD spectroscope directly at the sun.", "slug": "cd-spectroscope-explained"}, {"path": "khan/partner-content/exploratorium/light-and-color/cd-spectroscope/cd-spectroscope-observe/", "id": "UnH3nsk-Ibs", "title": "What\u2019s going on: Spreading light into a spectrum", "kind": "Video", "description": "Most light that you see is made up of many different wavelengths, which get bent at slightly different angles when reflected off a CD, producing a unique spectrum.\u00a0Find out more about how your specially engineered CD spectroscope works!", "slug": "cd-spectroscope-observe"}], "in_knowledge_map": false, "description": "Turn an old CD into a spectroscope to analyze light\u2014you may be surprised by what you see. Try pointing your CD spectroscope at the fluorescent light in your room, sunlit clouds in the sky (but never the sun), even your friend\u2019s colored shirt to reveal the wavelengths of light that mix together to create the color you see. It's your very own truth teller for light!", "node_slug": "cd-spectroscope", "render_type": "Tutorial", "topic_page_url": "/partner-content/Exploratorium/light-and-color/cd-spectroscope", "extended_slug": "partner-content/Exploratorium/light-and-color/cd-spectroscope", "kind": "Topic", "slug": "cd-spectroscope"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/exploratorium/light-and-color/soap-film-on-can/", "id": "soap-film-on-can", "hide": false, "title": "Soap Film on a Can", "child_data": [{"kind": "Video", "id": "x68a68a59"}, {"kind": "Video", "id": "xfdf524cd"}, {"kind": "Video", "id": "xb44a58a1"}, {"kind": "Video", "id": "x2aed369f"}, {"kind": "Article", "id": "x8d8ba2fb"}], "children": [{"path": "khan/partner-content/exploratorium/light-and-color/soap-film-on-can/soap-film-intro/", "id": "bvAd_oddj9w", "title": "Introduction: Why do we see colors in oily water and soap bubbles?", "kind": "Video", "description": "Soap bubbles are transparent, so where do all those beautiful, constantly shifting colors we see\u00a0come from?\u00a0In this science snack activity,\u00a0Paul Doherty of the Exploratorium Teacher Institute presents an easy way to explore and understand the science in your suds. Hint: think water sandwich!", "slug": "soap-film-intro"}, {"path": "khan/partner-content/exploratorium/light-and-color/soap-film-on-can/soap-film-build/", "id": "QH3kj7aeXHc", "title": "Create your soap film viewer: Materials, tools, and steps", "kind": "Video", "description": "Here are all the materials and instructions you'll need to experiment with soap film on your own.", "slug": "soap-film-build"}, {"path": "khan/partner-content/exploratorium/light-and-color/soap-film-on-can/soap-film-notice/", "id": "e_wKQT8Un5I", "title": "To do and notice: Horizontal bands of color", "kind": "Video", "description": "Watch closely as different colors and patterns develop and change over time.", "slug": "soap-film-notice"}, {"path": "khan/partner-content/exploratorium/light-and-color/soap-film-on-can/soap-film-whatsgoingon/", "id": "vQW94GVN524", "title": "What\u2019s going on: Reflections, interference, and \u2026 a water sandwich?", "kind": "Video", "description": "This video helps you understand how light interacts with your water sandwich\u2014ahem: soap film! Learn how\u00a0reflections cancel out\u00a0some\u00a0colors\u00a0but not others,\u00a0resulting in\u00a0those bands of color that stretch across the film can.", "slug": "soap-film-whatsgoingon"}], "in_knowledge_map": false, "description": "Why do we see colors in oily water and soap bubbles? Sometimes we see red, sometimes blue, and sometimes it appears as though we see nothing at all. Experiment with soap film to observe the behavior and colorful appearance of different wavelengths of light.", "node_slug": "soap-film-on-can", "render_type": "Tutorial", "topic_page_url": "/partner-content/Exploratorium/light-and-color/soap-film-on-can", "extended_slug": "partner-content/Exploratorium/light-and-color/soap-film-on-can", "kind": "Topic", "slug": "soap-film-on-can"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/exploratorium/light-and-color/soap-film-interference-model/", "id": "soap-film-interference-model", "hide": false, "title": "Soap Film Interference Model", "child_data": [{"kind": "Video", "id": "x2018a28b"}, {"kind": "Video", "id": "x6d9529c8"}, {"kind": "Video", "id": "xc88bf9e1"}, {"kind": "Video", "id": "x7131e195"}, {"kind": "Article", "id": "xd1d80011"}], "children": [{"path": "khan/partner-content/exploratorium/light-and-color/soap-film-interference-model/do-the-experiment-part-1-soap-film-interference-model-science-snacks-exploratorium/", "id": "cGvrADwJnZU", "title": "Do the experiment: Part 1", "kind": "Video", "description": "In Part 1 of this Science Snack, Paul Doherty of the Exploratorium's Teacher Institute models what happens when a soap film is one wavelength of blue light thick.", "slug": "do-the-experiment-part-1-soap-film-interference-model-science-snacks-exploratorium"}, {"path": "khan/partner-content/exploratorium/light-and-color/soap-film-interference-model/do-the-experiment-part-2-soap-film-interference-model-science-snacks-exploratorium/", "id": "rmQeaJ7lu1g", "title": "Do the experiment: Part 2", "kind": "Video", "description": "We've seen what happens with a soap film that is one wavelength of blue light thick, so what if we try even thinner soap films?", "slug": "do-the-experiment-part-2-soap-film-interference-model-science-snacks-exploratorium"}, {"path": "khan/partner-content/exploratorium/light-and-color/soap-film-interference-model/how-does-it-work-soap-film-interference-model-science-snacks-exploratorium/", "id": "nUxbejIJqQ4", "title": "What's going on? Wave drawings, light, and color", "kind": "Video", "description": "What does a wave drawing of light actually represent? Paul gives his explanation, as well as tips on teaching this activity in your classroom.", "slug": "how-does-it-work-soap-film-interference-model-science-snacks-exploratorium"}], "in_knowledge_map": false, "description": "Light reflecting off the surface of soapy water produces colors\u2014why? What affects which colors you see? Try this activity and learn how to model what happens when light of different wavelengths encounters soap film of different thicknesses. This snack is a companion to the Soap Film on a Can tutorial.", "node_slug": "soap-film-interference-model", "render_type": "Tutorial", "topic_page_url": "/partner-content/Exploratorium/light-and-color/soap-film-interference-model", "extended_slug": "partner-content/Exploratorium/light-and-color/soap-film-interference-model", "kind": "Topic", "slug": "soap-film-interference-model"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/exploratorium/light-and-color/colored-shadows/", "id": "colored-shadows", "hide": false, "title": "Colored Shadows", "child_data": [{"kind": "Video", "id": "x39721140"}, {"kind": "Video", "id": "x9dd6f992"}, {"kind": "Video", "id": "x16b9fcc2"}, {"kind": "Article", "id": "x0ac27bf7"}, {"kind": "Video", "id": "x4fd24fed"}, {"kind": "Video", "id": "xd808eb92"}, {"kind": "Article", "id": "xee4a8b21"}], "children": [{"path": "khan/partner-content/exploratorium/light-and-color/colored-shadows/colored-shadows-introduction-1/", "id": "iyMHWOwBiVc", "title": "Colored shadows: Introduction", "kind": "Video", "slug": "colored-shadows-introduction-1"}, {"path": "khan/partner-content/exploratorium/light-and-color/colored-shadows/build-your-own-colored-shadows-materials-steps/", "id": "6A1QWaP7cBo", "title": "Build your own colored shadows: Materials & steps", "kind": "Video", "description": "Here's everything you'll need to build your own colored shadows.", "slug": "build-your-own-colored-shadows-materials-steps"}, {"path": "khan/partner-content/exploratorium/light-and-color/colored-shadows/playing-with-colored-shadows-how-it-works/", "id": "gG2HYC-Aw9Y", "title": "What's going on: Light travels in straight lines", "kind": "Video", "description": "What's the science behind the phenomenon of colored shadows? Light travels in straight lines, but we have three different-colored bulbs spaced several inches apart.", "slug": "playing-with-colored-shadows-how-it-works"}, {"path": "khan/partner-content/exploratorium/light-and-color/colored-shadows/colored-shadows-yellow-and-cyan/", "id": "zpzM3Xun6-Q", "title": "Yellow and cyan challenge", "kind": "Video", "description": "Now that we understand how the magenta shadow is produced, what about the other colors we see?", "slug": "colored-shadows-yellow-and-cyan"}, {"path": "khan/partner-content/exploratorium/light-and-color/colored-shadows/colored-shadows-yellow-and-cyan-solution/", "id": "3KbEACrLCJU", "title": "Yellow and cyan solution", "kind": "Video", "description": "Each color you see comes from the pencil blocking one of the lights and the other two filling in the shadow.", "slug": "colored-shadows-yellow-and-cyan-solution"}], "in_knowledge_map": false, "description": "Are shadows always black, or can they take on the colors of the rainbow? \n\nIn this hands-on science snack, which was developed and demonstrated by Exploratorium Senior Scientist Paul Doherty, you\u2019ll have fun with colored lightbulbs, experiment with additive color mixtures, and learn about human color perception.\n\nWatch the videos, build your own colored shadows, and see how exciting light and shadow can be.", "node_slug": "colored-shadows", "render_type": "Tutorial", "topic_page_url": "/partner-content/Exploratorium/light-and-color/colored-shadows", "extended_slug": "partner-content/Exploratorium/light-and-color/colored-shadows", "kind": "Topic", "slug": "colored-shadows"}], "in_knowledge_map": false, "description": "Light: it\u2019s a particle, it\u2019s a wave, it\u2019s all that our eyes can detect. In these hands-on activities, you\u2019ll explore phenomena related to light, color, and human perception. Blow your mind creating multicolored shadows and more.", "node_slug": "light-and-color", "render_type": "Topic", "topic_page_url": "/partner-content/Exploratorium/light-and-color", "extended_slug": "partner-content/Exploratorium/light-and-color", "kind": "Topic", "slug": "light-and-color"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/exploratorium/exploratorium-chemistry/", "id": "exploratorium-chemistry", "hide": false, "title": "Chemistry", "child_data": [{"kind": "Topic", "id": "x3b9d4f37"}, {"kind": "Topic", "id": "x2eeafd16"}, {"kind": "Topic", "id": "x9c493823"}, {"kind": "Topic", "id": "xdce41dad"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/exploratorium/exploratorium-chemistry/penny-battery/", "id": "penny-battery", "hide": false, "title": "Penny Battery", "child_data": [{"kind": "Video", "id": "x41a25f71"}, {"kind": "Video", "id": "xc565408b"}, {"kind": "Video", "id": "x86c892ff"}, {"kind": "Video", "id": "x522d7a89"}, {"kind": "Video", "id": "x7b188442"}, {"kind": "Article", "id": "x9596b621"}], "children": [{"path": "khan/partner-content/exploratorium/exploratorium-chemistry/penny-battery/penny-battery-wow/", "id": "iHBz77E625o", "title": "Penny battery introduction", "kind": "Video", "description": "You can make a simple battery, powerful enough to light an LED, with the change in your pockets!", "slug": "penny-battery-wow"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/penny-battery/build-your-own-penny-battery-materials-steps/", "id": "Bs2mEx4WZPY", "title": "Build your own penny battery: Materials & steps", "kind": "Video", "description": "In this video, you'll find the materials and tools you'll need to build your own penny battery, as well as all the necessary steps.", "slug": "build-your-own-penny-battery-materials-steps"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/penny-battery/penny-battery-how-does-it-work/", "id": "M-WK4kpvAPw", "title": "What's going on: Chemical energy into electrical energy", "kind": "Video", "description": "What's the science behind this activity? A battery is chemical energy converted into electrical energy.", "slug": "penny-battery-how-does-it-work"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/penny-battery/penny-battery-challenge-1/", "id": "J4DdH8VBn88", "title": "Challenge: Design a more powerful battery", "kind": "Video", "description": "So now you know how to light a red LED. What about a blue one? Hint: a blue LED requires more power.", "slug": "penny-battery-challenge-1"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/penny-battery/penny-battery-challenge-2/", "id": "y5rv8mJgXGE", "title": "Challenge solution", "kind": "Video", "description": "A four-cell battery generates 2 volts, but we need to generate 3 volts to light the blue LED.", "slug": "penny-battery-challenge-2"}], "in_knowledge_map": false, "description": "Can you light up a room with just five cents? \n\nA battery is a device that converts chemical energy into electrical energy. This activity, developed and demonstrated by Julie Yu, director of the Exploratorium Teacher Institute, shows you how to build a battery strong enough to power an LED for a whole day\u2014using nothing more than a few pennies and a salty solution. \n\nWatch the videos to learn how to build a battery of your very own, and light the way for other chemistry lovers.", "node_slug": "penny-battery", "render_type": "Tutorial", "topic_page_url": "/partner-content/Exploratorium/exploratorium-chemistry/penny-battery", "extended_slug": "partner-content/Exploratorium/exploratorium-chemistry/penny-battery", "kind": "Topic", "slug": "penny-battery"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/exploratorium/exploratorium-chemistry/ocean-acidification/", "id": "ocean-acidification", "hide": false, "title": "Ocean Acidification in a Cup", "child_data": [{"kind": "Video", "id": "x311dd642"}, {"kind": "Video", "id": "xea959b05"}, {"kind": "Video", "id": "x81476de5"}, {"kind": "Video", "id": "x62ab855d"}, {"kind": "Video", "id": "xf787e1a8"}, {"kind": "Article", "id": "x84a6c327"}], "children": [{"path": "khan/partner-content/exploratorium/exploratorium-chemistry/ocean-acidification/ocean-acidification-intro/", "id": "f1eP2m01PCQ", "title": "Introduction: This simple experiment illustrates ocean acidification ... in a cup!", "kind": "Video", "description": "Human activity is having an enormous impact on our natural environment, including making our oceans more acidic. This hands-on science snack, Ocean Acidification in a Cup, models the chemical process that's occurring around us and helps you understand some of the mechanisms and impacts related to climate change.", "slug": "ocean-acidification-intro"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/ocean-acidification/ocean-acidification-build/", "id": "FXG056WcAxY", "title": "Set up your experiment: Tools, materials, and assembly", "kind": "Video", "description": "In this video, Lori Lambertson of the Exploratorium Teacher Institute takes us step by step through everything you'll need to do the Ocean Acidification in a Cup experiment yourself.", "slug": "ocean-acidification-build"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/ocean-acidification/ocean-acidification-observe/", "id": "pLW8x4XsszY", "title": "What\u2019s going on: Creating carbon dioxide gas that diffuses into liquid", "kind": "Video", "description": "Learn about passive diffusion and discover how this chemical process relates to big changes in our oceans.", "slug": "ocean-acidification-observe"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/ocean-acidification/ocean-acidification-challenge/", "id": "9DM1S2TXi_M", "title": "Challenge: Can you prove that diffusion happens both ways?", "kind": "Video", "description": "Now that you understand how to do this experiment and what's going on, can you figure out a way to reverse the process (from the liquid back into the atmosphere)?", "slug": "ocean-acidification-challenge"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/ocean-acidification/ocean-acidification-tips/", "id": "mmljtQHP0dw", "title": "Experiment tips", "kind": "Video", "description": "Here are a few tips from Lori to help you conduct your Ocean Acidification in a Cup experiment.", "slug": "ocean-acidification-tips"}], "in_knowledge_map": false, "description": "Create a carbon dioxide-rich atmosphere in a cup and watch how it changes the water beneath it. This model of ocean\u2013atmosphere interaction shows how carbon dioxide gas diffuses into water, causing the water to become more acidic. Ocean acidification is a change that can have big consequences.", "node_slug": "ocean-acidification", "render_type": "Tutorial", "topic_page_url": "/partner-content/Exploratorium/exploratorium-chemistry/ocean-acidification", "extended_slug": "partner-content/Exploratorium/exploratorium-chemistry/ocean-acidification", "kind": "Topic", "slug": "ocean-acidification"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/exploratorium/exploratorium-chemistry/indicating-electrolysis/", "id": "indicating-electrolysis", "hide": false, "title": "Indicating Electrolysis", "child_data": [{"kind": "Video", "id": "xe6c501b2"}, {"kind": "Video", "id": "xcd485d51"}, {"kind": "Video", "id": "x91ab4e11"}, {"kind": "Video", "id": "xb43b61a4"}, {"kind": "Article", "id": "xf924c63f"}], "children": [{"path": "khan/partner-content/exploratorium/exploratorium-chemistry/indicating-electrolysis/electrolysis-intro-hd-720p/", "id": "LsNwC7LpY50", "title": "Introduction: Breaking up water isn't hard to do", "kind": "Video", "description": "Break up water into hydrogen and oxygen gas with a simple electrolysis device. Then, use an acid-base indicator and a magnet to create groovy swirls of color.", "slug": "electrolysis-intro-hd-720p"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/indicating-electrolysis/electrolysis-build-experiment-hd-720p/", "id": "LWwGfQ8fBwA", "title": "Do the experiment: Tools, materials, and assembly", "kind": "Video", "description": "In this video, Julie Yu of the Exploratorium Teacher Institute takes us step by step through everything you'll need to do the Indicating Electrolysis experiment yourself.", "slug": "electrolysis-build-experiment-hd-720p"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/indicating-electrolysis/electrolysis-wgo-hd-720p/", "id": "mA-rgIPVh7A", "title": "What's going on: Use electricity to break up water", "kind": "Video", "description": "Learn about electrolysis and how it makes water more acidic or basic.", "slug": "electrolysis-wgo-hd-720p"}, {"path": "khan/partner-content/exploratorium/exploratorium-chemistry/indicating-electrolysis/electrolysis-teacher-tips-hd-720p/", "id": "kVJTlv0A3RM", "title": "Experiment tips", "kind": "Video", "description": "Here are a few tips from Julie to help you conduct your Indicating Electrolysis experiment.", "slug": "electrolysis-teacher-tips-hd-720p"}], "in_knowledge_map": false, "description": "Without much more than a 9-volt battery, you can break water into its two molecular ingredients, hydrogen and oxygen. The four video modules of this hands-on science snack show you how to build a simple electrolysis device and break up water. Using an acid-base indicator, you'll also observe groovy swirls of color in the water as it changes.", "node_slug": "indicating-electrolysis", "render_type": "Tutorial", "topic_page_url": "/partner-content/Exploratorium/exploratorium-chemistry/indicating-electrolysis", "extended_slug": "partner-content/Exploratorium/exploratorium-chemistry/indicating-electrolysis", "kind": "Topic", "slug": "indicating-electrolysis"}], "in_knowledge_map": false, "description": "These hands-on activities investigate phenomena that arise from molecules and atoms interacting and transforming in different ways. Build a battery and light up an LED without much more than the change in your pocket.", "node_slug": "exploratorium-chemistry", "render_type": "Topic", "topic_page_url": "/partner-content/Exploratorium/exploratorium-chemistry", "extended_slug": "partner-content/Exploratorium/exploratorium-chemistry", "kind": "Topic", "slug": "exploratorium-chemistry"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/exploratorium/expl-sound/", "id": "Expl-sound", "hide": false, "title": "Electromagnetism", "child_data": [{"kind": "Topic", "id": "x2a9461d5"}, {"kind": "Topic", "id": "xd3fd4b4a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/exploratorium/expl-sound/light-to-sound/", "id": "light-to-sound", "hide": false, "title": "Turn Light into Sound", "child_data": [{"kind": "Video", "id": "x8f5e87f6"}, {"kind": "Article", "id": "xc89882d6"}, {"kind": "Video", "id": "xd7404bf5"}, {"kind": "Video", "id": "xdafb4890"}, {"kind": "Video", "id": "x49c4decb"}, {"kind": "Article", "id": "xc976436a"}, {"kind": "Article", "id": "xcd2e379c"}, {"kind": "Article", "id": "x422cf502"}], "children": [{"path": "khan/partner-content/exploratorium/expl-sound/light-to-sound/light-to-sound-introduction/", "id": "G9DDOq7MtLk", "title": "Light into sound introduction", "kind": "Video", "description": "Turn sound into light and then back again with a few simple materials.", "slug": "light-to-sound-introduction"}, {"path": "khan/partner-content/exploratorium/expl-sound/light-to-sound/received/", "id": "uhqIh7wXwS4", "title": "Build and test the receiver", "kind": "Video", "description": "A solar cell connected to a speaker converts the light into sound.", "slug": "received"}, {"path": "khan/partner-content/exploratorium/expl-sound/light-to-sound/transmitter/", "id": "ngJifVCOmgg", "title": "Build the transmitter", "kind": "Video", "description": "The electrical signal from a radio is converted to light with the help of a 9V battery.", "slug": "transmitter"}, {"path": "khan/partner-content/exploratorium/expl-sound/light-to-sound/build/", "id": "RUYtxofTWKM", "title": "Construct the parallel circuit, put it all together", "kind": "Video", "description": "A detailed demonstration of how to build this project, from beginning to end.", "slug": "build"}], "in_knowledge_map": false, "description": "Can you listen to a beam of light? \n\nAudio signals can be transmitted along radio waves through space, and in electrical pulses through wires. Visible light and other forms of electromagnetic radiation can carry audio signals, too. In this activity, learn how to build a simple device in which the signal from a radio is transmitted along a beam of light traveling between a light-emitting diode (LED) and a solar cell. \n\nThis science snack was developed by Exploratorium Teacher Institute staff Don Rathjen and demonstrated by Exploratorium Senior Scientist Paul Doherty.", "node_slug": "light-to-sound", "render_type": "Tutorial", "topic_page_url": "/partner-content/Exploratorium/Expl-sound/light-to-sound", "extended_slug": "partner-content/Exploratorium/Expl-sound/light-to-sound", "kind": "Topic", "slug": "light-to-sound"}], "in_knowledge_map": false, "description": "Charge! That\u2019s what this area of physics is all about (well, electrical charge and its motion, to be exact). Explore electricity, magnetism, and electromagnetic fields\u2014and harness the power to transform sound into light.", "node_slug": "Expl-sound", "render_type": "Topic", "topic_page_url": "/partner-content/Exploratorium/Expl-sound", "extended_slug": "partner-content/Exploratorium/Expl-sound", "kind": "Topic", "slug": "expl-sound"}], "in_knowledge_map": false, "description": "The Exploratorium is a 21st-century learning laboratory and museum based in San Francisco. Since 1969, we\u2019ve offered visitors and learners around the world the opportunity to experience everyday scientific phenomena firsthand through creative, thought-provoking exhibits, educational tools, and programs. We promote an inquiry-based approach to learning\u2014one that ignites curiosity about the world around us, encourages exploration, and leads to profound discoveries.\n\nThe science \"snacks\" on this website are fun, hands-on activities developed and thoroughly tested by the Exploratorium Teacher Institute. Dive in and discover what we're all about!", "node_slug": "Exploratorium", "render_type": "Subject", "topic_page_url": "/partner-content/Exploratorium", "extended_slug": "partner-content/Exploratorium", "kind": "Topic", "slug": "exploratorium"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/all-star-orchestra/", "id": "all-star-orchestra", "hide": false, "title": "All-Star Orchestra", "child_data": [{"kind": "Topic", "id": "xbd7689b7"}, {"kind": "Topic", "id": "x7470afac"}, {"kind": "Topic", "id": "xe6ddfd4a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/elements-of-music/", "id": "elements-of-music", "hide": false, "title": "Music basics: Notes and rhythm", "child_data": [{"kind": "Video", "id": "x66f0775f"}, {"kind": "Video", "id": "x2e654f1e"}, {"kind": "Video", "id": "x8401bfc8"}, {"kind": "Video", "id": "xd988a512"}, {"kind": "Video", "id": "x26a800b0"}, {"kind": "Video", "id": "x859f88b9"}, {"kind": "Article", "id": "x9cfdeacb"}], "children": [{"path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-1-note-values-duration-and-time-signatures/", "id": "wQHcz7U01M4", "title": "Lesson 1: Note values, duration, and time signatures", "kind": "Video", "description": "Definitions and basic concepts", "slug": "lesson-1-note-values-duration-and-time-signatures"}, {"path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-2-rhythm-dotted-notes-ties-and-rests/", "id": "ZPRMFBN8p4Q", "title": "Lesson 2: Rhythm, dotted notes, ties, and rests", "kind": "Video", "slug": "lesson-2-rhythm-dotted-notes-ties-and-rests"}, {"path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-3-meters-in-double-and-triple-time-upbeats/", "id": "GFnucXG0K1I", "title": "Lesson 3: Meters in double and triple time, upbeats", "kind": "Video", "slug": "lesson-3-meters-in-double-and-triple-time-upbeats"}, {"path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-4-meters-in-6-9-and-12/", "id": "mVFbGjnysP0", "title": "Lesson 4: Meters in 6, 9, and 12", "kind": "Video", "slug": "lesson-4-meters-in-6-9-and-12"}, {"path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-5-review-of-time-signatures-simple-compound-and-complex/", "id": "w89mmoD0O4c", "title": "Lesson 5: Review of time signatures \u2013 Simple, compound, and complex", "kind": "Video", "slug": "lesson-5-review-of-time-signatures-simple-compound-and-complex"}, {"path": "khan/partner-content/all-star-orchestra/elements-of-music/lesson-6-constant-versus-changing-time-adding-triplets-and-duplets/", "id": "esbqpgAD-EM", "title": "Lesson 6: Constant versus changing time, adding triplets, and duplets", "kind": "Video", "slug": "lesson-6-constant-versus-changing-time-adding-triplets-and-duplets"}], "in_knowledge_map": false, "description": "The basic principles of music are explained in plain language with helpful graphics and live video demonstrations. If you have ever wondered \"how does music work?\" then you'll find answers here. Presented by the All-Star Orchestra music director Gerard Schwarz.", "node_slug": "elements-of-music", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/elements-of-music", "extended_slug": "partner-content/all-star-orchestra/elements-of-music", "kind": "Topic", "slug": "elements-of-music"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/", "id": "masterpieces-old-and-new", "hide": false, "title": "Masterpieces old and new", "child_data": [{"kind": "Topic", "id": "x29e80cfa"}, {"kind": "Topic", "id": "x1b2fbbce"}, {"kind": "Topic", "id": "x3dd505d7"}, {"kind": "Topic", "id": "x662ddaf0"}, {"kind": "Topic", "id": "x40e0b5c6"}, {"kind": "Topic", "id": "x18232ab5"}, {"kind": "Topic", "id": "x15b229d4"}, {"kind": "Topic", "id": "x8fc1318b"}, {"kind": "Topic", "id": "x6116bc8b"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony/", "id": "beethoven-fifth-symphony", "hide": false, "title": "Ludwig van Beethoven: Symphony No. 5", "child_data": [{"kind": "Video", "id": "x1aa715a0"}, {"kind": "Video", "id": "xa965e726"}, {"kind": "Video", "id": "xee91152b"}, {"kind": "Video", "id": "x17f7b93e"}, {"kind": "Video", "id": "x1b205730"}], "children": [{"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony/ludwig-van-beethoven-part-1/", "id": "-rGXAfc643A", "title": "Ludwig van Beethoven: Symphony No. 5, analysis by Gerard Schwarz (part 1)", "kind": "Video", "description": "Watch the full performance here", "slug": "ludwig-van-beethoven-part-1"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony/ludwig-van-beethoven-symphony-no-5-analysis-by-gerard-schwarz-mov-2/", "id": "iFCIgn3Q9XE", "title": "Ludwig van Beethoven: Symphony No. 5 Analysis by Gerard Schwarz (part 2)", "kind": "Video", "description": "Watch the full performance here", "slug": "ludwig-van-beethoven-symphony-no-5-analysis-by-gerard-schwarz-mov-2"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony/beethoven-fourth-movement/", "id": "VNB-OVWlRbk", "title": "Ludwig van Beethoven: Symphony No. 5, analysis by Gerard Schwarz (part 3 & 4 )", "kind": "Video", "description": "Watch the full performance", "slug": "beethoven-fourth-movement"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony/gerard-schwarz-gives-a-conducting-lesson-beethoven-5th-part-1/", "id": "m9h7Vt8ZjqE", "title": "Ludwig van Beethoven: Symphony No. 5, a conducting lesson by Gerard Schwarz (1st Movement)", "kind": "Video", "description": "Watch the full performance here (starting at 10:40)", "slug": "gerard-schwarz-gives-a-conducting-lesson-beethoven-5th-part-1"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony/ludwig-van-beethoven-symphony-no-5-an-appreciation-by-leon-botstein/", "id": "DGBYyf08nWM", "title": "Ludwig van Beethoven: Symphony No. 5, an appreciation by Leon Botstein", "kind": "Video", "slug": "ludwig-van-beethoven-symphony-no-5-an-appreciation-by-leon-botstein"}], "in_knowledge_map": false, "description": "Possibly the most iconic of all symphonies, \"Beethoven's 5th\" is instantly recognizable by its dramatic opening motive. Learn how this rhythmic and melodic idea permeates the entire work, holding the listener in thrall through all four movements to the blazing finale. Music Director Gerard Schwarz and noted expert Leon Botstein explore the many facets of Beethoven's masterpiece, including a demonstration by Maestro Schwarz of how to conduct the first movement.", "node_slug": "beethoven-fifth-symphony", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony", "extended_slug": "partner-content/all-star-orchestra/masterpieces-old-and-new/beethoven-fifth-symphony", "kind": "Topic", "slug": "beethoven-fifth-symphony"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/tchaikovsky-4th-analysis/", "id": "Tchaikovsky-4th-analysis", "hide": false, "title": "Pyotr Ilyich Tchaikovsky: Symphony No.4", "child_data": [{"kind": "Video", "id": "x74faa781"}, {"kind": "Video", "id": "xe738aba1"}, {"kind": "Video", "id": "x36fd7b6e"}, {"kind": "Video", "id": "xf4c12f08"}], "children": [{"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/tchaikovsky-4th-analysis/pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-1/", "id": "9_-YqgZs6vI", "title": "Pyotr Ilyich Tchaikovsky: Symphony No.4, analysis by Gerard Schwarz (part 1)", "kind": "Video", "description": "Watch the full performance here", "slug": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-1"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/tchaikovsky-4th-analysis/pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-2/", "id": "knQtiFUyCi8", "title": "Pyotr Ilyich Tchaikovsky: Symphony No.4, analysis by Gerard Schwarz (part 2)", "kind": "Video", "description": "Watch the full performance here", "slug": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-2"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/tchaikovsky-4th-analysis/pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-3/", "id": "BsLnura5zwE", "title": "Pyotr Ilyich Tchaikovsky: Symphony No.4, analysis by Gerard Schwarz (part 3)", "kind": "Video", "description": "Watch the full performance here", "slug": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-3"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/tchaikovsky-4th-analysis/pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-4/", "id": "7X1_3i9DimY", "title": "Pyotr Ilyich Tchaikovsky: Symphony No.4, analysis by Gerard Schwarz (part 4)", "kind": "Video", "description": "Watch te full performance here", "slug": "pyotr-ilyich-tchaikovsky-symphony-no4-analysis-by-gerard-schwarz-part-4"}], "in_knowledge_map": false, "description": "The 4th Symphony of Piotr Il\u2019yich Tchaikovsky, composed in 1877-78 when he was 37 years old, is one of the most dramatic works for orchestra. The music reflects the powerful emotions that Tchaikovsky experienced during this most difficult period of his life: forbidden love, a failed marriage, a mysterious patron whom he was never to meet, and the struggle to understand and accept the inevitability of Fate.", "node_slug": "Tchaikovsky-4th-analysis", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/masterpieces-old-and-new/Tchaikovsky-4th-analysis", "extended_slug": "partner-content/all-star-orchestra/masterpieces-old-and-new/Tchaikovsky-4th-analysis", "kind": "Topic", "slug": "tchaikovsky-4th-analysis"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/", "id": "dvorak-symphony-9", "hide": false, "title": "Anton\u00edn Dvo\u0159\u00e1k: Symphony No. 9 \"From the New World\"", "child_data": [{"kind": "Video", "id": "xabf25d1f"}, {"kind": "Video", "id": "x0247474a"}, {"kind": "Video", "id": "xf5c5407b"}, {"kind": "Video", "id": "xe4424a1e"}, {"kind": "Video", "id": "x3f8ef954"}], "children": [{"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/dvorak-one/", "id": "4vuybxJvRuA", "title": "Anton\u00edn Dvo\u0159\u00e1k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 1)", "kind": "Video", "description": "Watch the full performance here", "slug": "dvorak-one"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/dvorak-two/", "id": "Egzqu5DWwbA", "title": "Antoni\u0301n Dvor\u030ca\u0301k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 2)", "kind": "Video", "description": "Watch the full performance here", "slug": "dvorak-two"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/dvorak-three/", "id": "umoSO56Nwa8", "title": "Antoni\u0301n Dvor\u030ca\u0301k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 3)", "kind": "Video", "description": "Watch the full performance here", "slug": "dvorak-three"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/dvorak-four/", "id": "9x1vnGfIE8k", "title": "Antoni\u0301n Dvor\u030ca\u0301k: Symphony No. 9 \"From the New World,\" analysis by Gerard Schwarz (part 4)", "kind": "Video", "description": "Watch the full performance here", "slug": "dvorak-four"}, {"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9/joseph-horowitz-on-dvorak-minilecture/", "id": "AqvaQfbAC64", "title": "Anton\u00edn Dvo\u0159\u00e1k: Symphony No. 9 \"From the New World\" From the New World,\" a commentary by Joseph Horowitz", "kind": "Video", "slug": "joseph-horowitz-on-dvorak-minilecture"}], "in_knowledge_map": false, "description": "Inspired by American dreams and legends, Antonin Dvo\u0159\u00e1k created some of his greatest works while living in the United States, above all the \u201cNew World\u201d Symphony. Music Director Gerard Schwarz and Dvo\u0159\u00e1k expert Joseph Horowitz delve into the music, and illuminate the multiple stories and influences \u2013 Native American, African-American and Czech \u2013that Dvo\u0159\u00e1k transformed in his most famous work.", "node_slug": "dvorak-symphony-9", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9", "extended_slug": "partner-content/all-star-orchestra/masterpieces-old-and-new/dvorak-symphony-9", "kind": "Topic", "slug": "dvorak-symphony-9"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/brahms-af-verture/", "id": "brahms-af-verture", "hide": false, "title": "Johannes Brahms: Academic Festival Overture", "child_data": [{"kind": "Video", "id": "xe0864a11"}], "children": [{"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/brahms-af-verture/brahms-acad-fest-overture/", "id": "VIV-yJfIrlI", "title": "Johannes Brahms: Academic Festival Overture", "kind": "Video", "description": "Watch the full performance here", "slug": "brahms-acad-fest-overture"}], "in_knowledge_map": false, "description": "Although Johannes Brahms never went to a university, he was offered a PhD from the University of Breslau, but he to receive this he had to compose a work for the school. This became the Academic Festival Overture, described by Brahms as a cheerful potpourri of student songs. The overture has the largest orchestration of any of Brahms\u2019 works, and is among his most charming and optimistic pieces.", "node_slug": "brahms-af-verture", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/masterpieces-old-and-new/brahms-af-verture", "extended_slug": "partner-content/all-star-orchestra/masterpieces-old-and-new/brahms-af-verture", "kind": "Topic", "slug": "brahms-af-verture"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/stravinsky-firebird/", "id": "stravinsky-firebird", "hide": false, "title": "Igor Stravinsky: Suite from The Firebird", "child_data": [{"kind": "Video", "id": "x0643e82f"}], "children": [{"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/stravinsky-firebird/discover-stravinsky-firebird/", "id": "Im_XjHgQfW0", "title": "Discovering Stravinsky's Firebird: The story and the music", "kind": "Video", "description": "Watch the full performance here", "slug": "discover-stravinsky-firebird"}], "in_knowledge_map": false, "description": "The magical world of Russian folklore comes to life as Music Director Gerard Schwarz tells the story of The Firebird ballet, and looks into the music of Igor Stravinsky's thrilling musical score that was commissioned by the legendary impresario Serge Diaghilev and his Ballets Russes.", "node_slug": "stravinsky-firebird", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/masterpieces-old-and-new/stravinsky-firebird", "extended_slug": "partner-content/all-star-orchestra/masterpieces-old-and-new/stravinsky-firebird", "kind": "Topic", "slug": "stravinsky-firebird"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/ravel/", "id": "ravel", "hide": false, "title": "Maurice Ravel: Suite No. 2 from Daphnis et Chloe", "child_data": [{"kind": "Video", "id": "xd68d629e"}], "children": [{"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/ravel/ravel-suite2/", "id": "qfqbomqKZqY", "title": "Maurice Ravel: Daphnis et Chloe\u0301, analysis by Gerard Schwarz", "kind": "Video", "description": "Watch full performance here", "slug": "ravel-suite2"}], "in_knowledge_map": false, "description": "Analysis by Gerard Schwarz. A love story from ancient Greek mythology inspired the creation of an epic ballet in 1912. French composer Maurice Ravel expanded the possibilities of orchestral color and texture in his remarkable score. Music Director Gerard Schwarz explores the history and musical structure of this landmark work of musical Impressionism.", "node_slug": "ravel", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/masterpieces-old-and-new/ravel", "extended_slug": "partner-content/all-star-orchestra/masterpieces-old-and-new/ravel", "kind": "Topic", "slug": "ravel"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/philip-glass/", "id": "philip-glass", "hide": false, "title": "Introduction to Philip Glass' \"Harmonium Mountain\"", "child_data": [{"kind": "Video", "id": "x4b3f62b1"}], "children": [{"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/philip-glass/introp-glass-harmonium-mountain/", "id": "X-F3wDDdc0I", "title": "Introduction to Philip Glass' \"Harmonium Mountain\"", "kind": "Video", "description": "Watch the full performance here", "slug": "introp-glass-harmonium-mountain"}], "in_knowledge_map": false, "description": "Philip Glass is often called the most famous living composer today. His short work, Harmonium Mountain, was conceived in partnership with the visual artist Clifford Ross as the soundtrack for an animated film based on ever-changing images of a mountain in Colorado. This analysis explores connections between the visual and musical arts.", "node_slug": "philip-glass", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/masterpieces-old-and-new/philip-glass", "extended_slug": "partner-content/all-star-orchestra/masterpieces-old-and-new/philip-glass", "kind": "Topic", "slug": "philip-glass"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/rands/", "id": "rands", "hide": false, "title": "Bernard Rands: Adieu", "child_data": [{"kind": "Video", "id": "xdc3fa245"}], "children": [{"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/rands/adieu-composer-and-his-work/", "id": "WYI4u3beRdM", "title": "Adieu: The composer and his work", "kind": "Video", "description": "Watch the full performance here", "slug": "adieu-composer-and-his-work"}], "in_knowledge_map": false, "description": "Pulitzer-prize-winning composer and Harvard Professor of Music Bernard Rands discusses the art of composition. He and Music Director Gerard Schwarz look into the score of Rands' recent work \"Adieu\" (\"Goodbye\") as recorded by the All-Star Orchestra.", "node_slug": "rands", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/masterpieces-old-and-new/rands", "extended_slug": "partner-content/all-star-orchestra/masterpieces-old-and-new/rands", "kind": "Topic", "slug": "rands"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/read-thomas/", "id": "read-thomas", "hide": false, "title": "Augusta Read Thomas: Of Paradise and Light", "child_data": [{"kind": "Video", "id": "xf4ebba14"}], "children": [{"path": "khan/partner-content/all-star-orchestra/masterpieces-old-and-new/read-thomas/of-paradise-and-light-composer-and-her-work/", "id": "7BEbEZstN_k", "title": "Of Paradise and Light: The composer and her work", "kind": "Video", "description": "Watch the full performance here.", "slug": "of-paradise-and-light-composer-and-her-work"}], "in_knowledge_map": false, "description": "A leading composer of her generation, Augusta Read Thomas' works have been performed by major orchestras around the world. Here she discusses the compositional process that led to Of Paradise and Light. Music Director Gerard Schwarz joins in the discussion of this transcendent new work.", "node_slug": "read-thomas", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/masterpieces-old-and-new/read-thomas", "extended_slug": "partner-content/all-star-orchestra/masterpieces-old-and-new/read-thomas", "kind": "Topic", "slug": "read-thomas"}], "in_knowledge_map": false, "description": "Discover what makes a masterpiece by learning how classical works are composed. Music Director Gerard Schwarz explains the history, context and compositional techniques behind famous orchestral works, from Beethoven to leading composers of the present day.", "node_slug": "masterpieces-old-and-new", "render_type": "Topic", "topic_page_url": "/partner-content/all-star-orchestra/masterpieces-old-and-new", "extended_slug": "partner-content/all-star-orchestra/masterpieces-old-and-new", "kind": "Topic", "slug": "masterpieces-old-and-new"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/", "id": "instruments-of-the-orchestra", "hide": false, "title": "Instruments of the orchestra", "child_data": [{"kind": "Topic", "id": "xae43324e"}, {"kind": "Topic", "id": "xc0303d1a"}, {"kind": "Topic", "id": "x0b71f79a"}, {"kind": "Topic", "id": "xe799d6b9"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments/", "id": "string-instruments", "hide": false, "title": "Strings", "child_data": [{"kind": "Video", "id": "x575a074b"}, {"kind": "Video", "id": "x0ffdfe13"}, {"kind": "Video", "id": "x64989e72"}, {"kind": "Video", "id": "xffd0d2fe"}, {"kind": "Video", "id": "x4bb1e8af"}], "children": [{"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments/harp-interview-demo/", "id": "m2DBfaL7Zo4", "title": "Harp: Interview and demonstration with principal Nancy Allen", "kind": "Video", "slug": "harp-interview-demo"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments/violin-interview-and-demonstration-with-concertmaster-david-kim/", "id": "gvjFMvLVnG0", "title": "Violin: Interview and demonstration with concertmaster David Kim", "kind": "Video", "slug": "violin-interview-and-demonstration-with-concertmaster-david-kim"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments/viola-interview-and-demonstration-with-principal-rebecca-young/", "id": "ivbT-wvzK58", "title": "Viola: Interview and demonstration with principal Rebecca Young", "kind": "Video", "slug": "viola-interview-and-demonstration-with-principal-rebecca-young"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments/cello-interview-and-demonstration-with-principal-jerry-grossman/", "id": "fJiCHUimtpc", "title": "Cello: Interview and demonstration with principal Jerry Grossman", "kind": "Video", "slug": "cello-interview-and-demonstration-with-principal-jerry-grossman"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments/bass-interview-and-demonstration-with-principal-alexander-hanna/", "id": "35sOcVflhE0", "title": "Bass: Interview and demonstration with principal Alexander Hanna", "kind": "Video", "slug": "bass-interview-and-demonstration-with-principal-alexander-hanna"}], "in_knowledge_map": false, "description": "The largest group within the orchestra is comprised of instruments that produce sound from vibrating strings. The vibrations \u2013 resulting from the strings being played by a bow, or being plucked with the fingers \u2013 resonate within the body of each instrument. The violin, viola, cello and contrabass are all primary played with a bow. The harp is plucked and stroked with the hands. Principals from the All-Star Orchestra introduce the special qualities and histories of each instrument.", "node_slug": "string-instruments", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments", "extended_slug": "partner-content/all-star-orchestra/instruments-of-the-orchestra/string-instruments", "kind": "Topic", "slug": "string-instruments"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/", "id": "woodwinds", "hide": false, "title": "Woodwinds", "child_data": [{"kind": "Video", "id": "x99c6eddf"}, {"kind": "Video", "id": "xb7c2aa6a"}, {"kind": "Video", "id": "x77e1f586"}, {"kind": "Video", "id": "xaf9a29e3"}, {"kind": "Video", "id": "x2003d66b"}, {"kind": "Video", "id": "xf031a295"}, {"kind": "Video", "id": "x3032e315"}, {"kind": "Video", "id": "xd734f150"}], "children": [{"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/piccolo-interview-and-demonstration-with-nadine-asin/", "id": "h7dD-8eD5oA", "title": "Piccolo: Interview and demonstration with Nadine Asin", "kind": "Video", "slug": "piccolo-interview-and-demonstration-with-nadine-asin"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/flute-interview-demo/", "id": "MJIagUN4Lhw", "title": "Flute: Interview and demonstration with principal Jeffrey Khaner", "kind": "Video", "slug": "flute-interview-demo"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/e-flat-clarinet-interview-and-demonstration-with-jessica-phillips-rieske/", "id": "_Ub-jKHFEQg", "title": "E-Flat Clarinet: Interview and demonstration with Jessica Phillips Rieske", "kind": "Video", "slug": "e-flat-clarinet-interview-and-demonstration-with-jessica-phillips-rieske"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/clarinet-interview-and-demonstration-with-principal-jon-manasse/", "id": "0lX34MHTs8E", "title": "Clarinet: Interview and demonstration with principal Jon Manasse", "kind": "Video", "slug": "clarinet-interview-and-demonstration-with-principal-jon-manasse"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/bass-clarinet-interview-and-demonstration-with-james-ognibene/", "id": "oG7C7U3FhhQ", "title": "Bass Clarinet: Interview and demonstration with James Ognibene", "kind": "Video", "slug": "bass-clarinet-interview-and-demonstration-with-james-ognibene"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/oboe-interview/", "id": "HALbfdYE3hM", "title": "Oboe: Interview and demonstration with principal John Ferrillo", "kind": "Video", "slug": "oboe-interview"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/english-horn-pedro/", "id": "5flvVD_tnRw", "title": "English Horn: Interview and demonstration with Pedro Diaz", "kind": "Video", "slug": "english-horn-pedro"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds/maurice-ravel-daphnis/", "id": "xWvhFIh8AaI", "title": "Bassoon: Interview and demonstration with principal Nancy Goeres", "kind": "Video", "description": "Watch the full performance here (starting at 29:10)", "slug": "maurice-ravel-daphnis"}], "in_knowledge_map": false, "description": "This family of instruments is situated in the middle of the orchestra, and is comprised of three groups: the flutes (flutes, piccolo), single reeds (clarinets, bass-clarinet), and double reeds (oboe, English horn, bassoons, contra-bassoon) Watch and listen as principal players of the All-Star Orchestra demonstrate their instruments and tell about their musical lives.", "node_slug": "woodwinds", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds", "extended_slug": "partner-content/all-star-orchestra/instruments-of-the-orchestra/woodwinds", "kind": "Topic", "slug": "woodwinds"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/brass/", "id": "brass", "hide": false, "title": "Brass", "child_data": [{"kind": "Video", "id": "xbe6c8290"}, {"kind": "Video", "id": "x46207839"}, {"kind": "Video", "id": "xab3dc128"}, {"kind": "Video", "id": "x2d76f265"}], "children": [{"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/brass/french-horn-interview-demo/", "id": "PoHKNFGbwjM", "title": "French Horn: Interview and demonstration with principal John Cerminaro", "kind": "Video", "slug": "french-horn-interview-demo"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/brass/trumpet-interview-and-demonstration-with-principal-david-bilger/", "id": "N1GWZbwh2jQ", "title": "Trumpet: Interview and demonstration with principal David Bilger", "kind": "Video", "slug": "trumpet-interview-and-demonstration-with-principal-david-bilger"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/brass/trombone-interview-and-demonstration-with-principal-joseph-alessi/", "id": "9onC3FwiQeg", "title": "Trombone: Interview and demonstration with principal Joseph Alessi", "kind": "Video", "slug": "trombone-interview-and-demonstration-with-principal-joseph-alessi"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/brass/bass-trombone-interview-and-demonstration-with-denson-paul-pollard/", "id": "p6Ovm_jaeKg", "title": "Bass Trombone: Interview and demonstration with Denson Paul Pollard", "kind": "Video", "slug": "bass-trombone-interview-and-demonstration-with-denson-paul-pollard"}], "in_knowledge_map": false, "description": "Each of the instruments in this family are made to sound by the vibrations of the player's lips combined with a steady stream of breath. Learn from the All-Star Orchestra players themselves about the special attributes of the trumpet, French horn, trombone, bass trombone and tuba.", "node_slug": "brass", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/instruments-of-the-orchestra/brass", "extended_slug": "partner-content/all-star-orchestra/instruments-of-the-orchestra/brass", "kind": "Topic", "slug": "brass"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/percussion/", "id": "percussion", "hide": false, "title": "Percussion", "child_data": [{"kind": "Video", "id": "x32b8d131"}, {"kind": "Video", "id": "x218c8d49"}, {"kind": "Video", "id": "x89fe951b"}], "children": [{"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/percussion/timpani-interview-and-demonstration-with-principal-jauvon-gilliam/", "id": "-kn_8vUT0eI", "title": "Timpani: Interview and demonstration with principal Jauvon Gilliam", "kind": "Video", "slug": "timpani-interview-and-demonstration-with-principal-jauvon-gilliam"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/percussion/piano-as-orchestral-instrument-interview-and-demonstration-with-kimberly-russ/", "id": "r2syXj4Eb6w", "title": "Piano (as orchestral instrument): Interview and demonstration with Kimberly Russ", "kind": "Video", "slug": "piano-as-orchestral-instrument-interview-and-demonstration-with-kimberly-russ"}, {"path": "khan/partner-content/all-star-orchestra/instruments-of-the-orchestra/percussion/percussion-interview-and-demonstration-with-principal-chris-devine/", "id": "H235paj_4PE", "title": "Percussion: Interview and demonstration with principal Chris Devine and members of the percussion section", "kind": "Video", "slug": "percussion-interview-and-demonstration-with-principal-chris-devine"}], "in_knowledge_map": false, "description": "This large family, including timpani, drums, cymbals, xylophones, gongs, bells, and rattles, is comprised of musical instruments played by striking with the hand or with a stick or beater, or by shaking or rubbing. The All-Star Orchestra percussion section demonstrates the remarkable variety of sounds that can be produced. Also included in this group are orchestral keyboard instruments like the piano and celesta.", "node_slug": "percussion", "render_type": "Tutorial", "topic_page_url": "/partner-content/all-star-orchestra/instruments-of-the-orchestra/percussion", "extended_slug": "partner-content/all-star-orchestra/instruments-of-the-orchestra/percussion", "kind": "Topic", "slug": "percussion"}], "in_knowledge_map": false, "description": "Learn about the different instruments of the orchestra as they are presented and demonstrated by principal players from famous symphony orchestras.", "node_slug": "instruments-of-the-orchestra", "render_type": "Topic", "topic_page_url": "/partner-content/all-star-orchestra/instruments-of-the-orchestra", "extended_slug": "partner-content/all-star-orchestra/instruments-of-the-orchestra", "kind": "Topic", "slug": "instruments-of-the-orchestra"}], "in_knowledge_map": false, "description": "The All-Star Orchestra encourages greater appreciation of classical music as a living tradition. Top orchestral players from across the United States meet once-a-year in New York to record masterpieces and new works with Music Director Gerard Schwarz. Come behind the scenes, meet the musicians, attend an open rehearsal, gain a conductor's perspective, and have a first-person encounter with the music.", "node_slug": "all-star-orchestra", "render_type": "Subject", "topic_page_url": "/partner-content/all-star-orchestra", "extended_slug": "partner-content/all-star-orchestra", "kind": "Topic", "slug": "all-star-orchestra"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/wi-phi/", "id": "wi-phi", "hide": false, "title": "Wi-Phi (Wireless Philosophy)", "child_data": [{"kind": "Topic", "id": "x7fea00e6"}, {"kind": "Topic", "id": "xa1cdad6c"}, {"kind": "Topic", "id": "x9cb8b3f2"}, {"kind": "Topic", "id": "x62305d97"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/wi-phi/critical-thinking/", "id": "critical-thinking", "hide": false, "title": "Critical Thinking", "child_data": [{"kind": "Video", "id": "x1ba43b50"}, {"kind": "Exercise", "id": "xda2248da"}, {"kind": "Exercise", "id": "x6db3dc1a"}, {"kind": "Video", "id": "x67558d02"}, {"kind": "Exercise", "id": "x83f64ee5"}, {"kind": "Video", "id": "x63a03f11"}, {"kind": "Video", "id": "xd95a7883"}, {"kind": "Video", "id": "x0a13ea6e"}, {"kind": "Exercise", "id": "xe23a2223"}, {"kind": "Video", "id": "xb93909f5"}, {"kind": "Exercise", "id": "xa157a83b"}, {"kind": "Video", "id": "x846bd553"}, {"kind": "Exercise", "id": "x45b34a0d"}, {"kind": "Video", "id": "x45b25a33"}, {"kind": "Exercise", "id": "xbe794a9c"}, {"kind": "Video", "id": "x437b5001"}, {"kind": "Exercise", "id": "xd35fd510"}, {"kind": "Video", "id": "x2481be99"}, {"kind": "Video", "id": "x8abe3fe5"}, {"kind": "Exercise", "id": "x43172daa"}, {"kind": "Video", "id": "xb18b127c"}, {"kind": "Exercise", "id": "xad36e89c"}, {"kind": "Video", "id": "x5669bae5"}, {"kind": "Exercise", "id": "xf1d66fb0"}, {"kind": "Video", "id": "x2a52fbb3"}, {"kind": "Video", "id": "x006ec038"}, {"kind": "Exercise", "id": "x071d973f"}, {"kind": "Video", "id": "x990ea5b6"}, {"kind": "Video", "id": "x7541093c"}, {"kind": "Exercise", "id": "x242ef06c"}, {"kind": "Exercise", "id": "x78e92d1b"}, {"kind": "Video", "id": "x2c4c6f7b"}, {"kind": "Video", "id": "x289de286"}, {"kind": "Exercise", "id": "x4cdbd327"}, {"kind": "Video", "id": "xa60c6bc4"}, {"kind": "Exercise", "id": "x301ca828"}, {"kind": "Video", "id": "x4d5797f0"}, {"kind": "Video", "id": "x4c34d51d"}, {"kind": "Exercise", "id": "x966ea4c9"}, {"kind": "Video", "id": "x4a5d8b8d"}, {"kind": "Video", "id": "x019c954f"}, {"kind": "Video", "id": "x2a50f736"}, {"kind": "Video", "id": "xdff20185"}, {"kind": "Video", "id": "x240193a5"}, {"kind": "Video", "id": "x06244d77"}, {"kind": "Video", "id": "x8fb6a023"}], "children": [{"path": "khan/partner-content/wi-phi/critical-thinking/intro-to-critical-thinking/", "id": "Cum3k-Wglfw", "title": "Fundamentals: Introduction to Critical Thinking", "kind": "Video", "description": "Geoff Pynn gets you started on the critical thinking journey. He tells you what critical thinking is, what an argument is, and what the difference between a deductive and an ampliative argument is.\u00a0\n\nSpeaker: Dr. Geoff Pynn, Assistant Professor,\u00a0Northern Illinois University", "slug": "intro-to-critical-thinking"}, {"path": "khan/partner-content/wi-phi/critical-thinking/introduction-to-critical-thinking/", "id": "introduction-to-critical-thinking", "title": "Introduction to Critical Thinking, Part 1", "description": "Test your knowledge of the fundamentals of critical thinking!", "slug": "introduction-to-critical-thinking", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/introduction-to-critical-thinking-part-2/", "id": "introduction-to-critical-thinking-part-2", "title": "Introduction to Critical Thinking, Part 2", "description": "Test your knowledge of the fundamentals of critical thinking!", "slug": "introduction-to-critical-thinking-part-2", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/intro-to-critical-thinking-deductive-arguments/", "id": "3jvQrpVQaYM", "title": "Fundamentals: Deductive Arguments", "kind": "Video", "description": "In this video, Geoff Pynn follows up on his introduction to critical thinking by exploring how deductive arguments give us reason to believe their conclusions. \u00a0Good deductive arguments guarantee their conclusions, and so must be valid (i.e., it must be impossible for the premises to be true while the conclusion is false) and have true premises. \u00a0Philosophers call arguments like these \"sound\". \u00a0You can see whether an argument is sound by trying to think of a counterexample to it, but to see whether its premises are true, you need to do some research.\n\nSpeaker: Dr. Geoff Pynn, Assistant Professor, Northern\u00a0llinois\u00a0University", "slug": "intro-to-critical-thinking-deductive-arguments"}, {"path": "khan/partner-content/wi-phi/critical-thinking/deductive-arguments/", "id": "deductive-arguments", "title": "Deductive Arguments", "description": "Test your knowledge of deductive arguments!", "slug": "deductive-arguments", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/abductive-arguments/", "id": "vflZuk-_Hz4", "title": "Fundamentals: Abductive Arguments", "kind": "Video", "description": "In this video, Geoff Pynn follows up on his introduction to critical thinking by exploring how abductive arguments give us reason to believe their conclusions. Good abductive arguments don't guarantee their conclusions, but give us very good reasons to believe their conclusions. This sort of inference is called \"inference to the best explanation.\"\n\nSpeaker: Dr. Geoff Pynn, Assistant Professor, Northern Illinois University", "slug": "abductive-arguments"}, {"path": "khan/partner-content/wi-phi/critical-thinking/necessary-sufficient-conditions/", "id": "5LqNm9d2__I", "title": "Fundamentals: Necessary and Sufficient Conditions", "kind": "Video", "description": "In this video, Kelley discusses one of the most basic tools in the philosophers' tool kit: the distinction between necessary and sufficient conditions. Through the use of ordinary language glosses and plenty of examples this mighty distinction is brought down to earth and presented in a ready-to-use fashion.\n\nSpeaker:\u00a0Kelly Schiffman", "slug": "necessary-sufficient-conditions"}, {"path": "khan/partner-content/wi-phi/critical-thinking/more-about-necessary-and-sufficient-conditions/", "id": "9uOF3AZI_Gc", "title": "Fundamentals: More About Necessary and Sufficient Conditions", "kind": "Video", "description": "In this video, Kelley builds on the understanding of necessary and sufficient conditions laid out in her previous video on the topic. In addition to providing further illustrative examples, Kelley addresses a new complexity: that our judgments of necessity and sufficiency very often rely on implicit background assumptions. Kelley also tackles the difficult question \"What's so important about distinguishing necessary from sufficient conditions anyway?\".\n\nSpeaker: Kelley Schiffman, Yale University", "slug": "more-about-necessary-and-sufficient-conditions"}, {"path": "khan/partner-content/wi-phi/critical-thinking/necessary-vs-sufficient-conditions/", "id": "necessary-vs-sufficient-conditions", "title": "Necessary and Sufficient Conditions", "description": "Test your knowledge of the distinction between necessary and sufficient conditions!", "slug": "necessary-vs-sufficient-conditions", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/intrinsic-extrinsic-value/", "id": "DR42xdsLWkc", "title": "Fundamentals: Intrinsic vs. Instrumental Value", "kind": "Video", "description": "What sort of things do we value and why? In this video Kelley distinguishes two different kinds of value: (1) Intrinsic value--the value that something has in itself--and (2) instrumental value--the value that something has because it helps us to get or achieve some other thing. This philosophically and practically useful distinction is illuminated through the use of plenty of examples and ordinary language glosses.\u00a0\n\nSpeaker:\u00a0Kelly Schiffman", "slug": "intrinsic-extrinsic-value"}, {"path": "khan/partner-content/wi-phi/critical-thinking/instrumental-vs-intrinsic-value/", "id": "instrumental-vs-intrinsic-value", "title": "Instrumental vs. Intrinsic Value", "description": "Test your knowledge of the distinction between instrumental and intrinsic value.", "slug": "instrumental-vs-intrinsic-value", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/implicit-premise/", "id": "2kSqB7y0NjU", "title": "Fundamentals: Implicit Premise", "kind": "Video", "description": "This video will rock your world! You should watch it. This pithy little argument contains an implicit premise: \"If a video will rock your world, you should watch it\". In this video, Kelley will go over how to identify implicit premises in all sorts of arguments and discuss when it is and is not acceptable to leave a premise implicit.\n\nSpeaker:\u00a0Kelly Schiffman", "slug": "implicit-premise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/implicit-premise-quiz/", "id": "implicit-premise-quiz", "title": "Implicit Premise", "description": "Test your knowledge of implicit premises.", "slug": "implicit-premise-quiz", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/justification-and-explanation/", "id": "QiZNpzeTVKA", "title": "Fundamentals: Justification and Explanation", "kind": "Video", "description": "The concept of justification is fundamental to good, careful thinking. But what does it mean for a belief or action to be justified? In this video, Kelley sheds some light on how to assess whether a belief and action is justified. She also clarifies the notion of justification by distinguishing it from explanation and explaining its relationship to the practice of giving reasons.\n\nSpeaker: Kelley Schiffman", "slug": "justification-and-explanation"}, {"path": "khan/partner-content/wi-phi/critical-thinking/justification-vs-explanation/", "id": "justification-vs-explanation", "title": "Justification and Explanation", "description": "Test your knowledge of justification and explanation.", "slug": "justification-vs-explanation", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/normative-and-descriptive-claims/", "id": "KQOiHKT46zk", "title": "Fundamentals: Normative and Descriptive Claims", "kind": "Video", "description": "We humans are a chatty bunch--we talk A LOT. But each claim we make can be sorted neatly into one of two categories: it either describes something or it evaluates something (philosophers call these descriptive and normative claims respectively). In this video\u00a0Kelley\u00a0illustrates the descriptive/normative distinction, and its importance, with the use of ample examples\n\nSpeaker: Kelley Schiffman", "slug": "normative-and-descriptive-claims"}, {"path": "khan/partner-content/wi-phi/critical-thinking/normative-and-descriptive-claims_1/", "id": "normative-and-descriptive-claims", "title": "Normative and Descriptive Claims", "description": "Test your knowledge of the distinction between normative and descriptive claims!", "slug": "normative-and-descriptive-claims_1", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/validity/", "id": "kdJ6aGToDlo", "title": "Fundamentals: Validity", "kind": "Video", "description": "Paul Henne discusses the philosophical concept of validity. After reviewing the structure of an argument, he defines validity: an argument is valid if and only if its premises guarantee the conclusion. He reviews a few examples of validity and invalidity, and he leaves you with one example to figure out on your own.\nSpeaker: Paul Henne", "slug": "validity"}, {"path": "khan/partner-content/wi-phi/critical-thinking/critical-thinking-truth-and-validity/", "id": "pCGnyaa5E5g", "title": "Fundamentals: Truth and Validity", "kind": "Video", "description": "In this video, Julianne Chung explains the philosophical concepts of truth and validity before going on to illustrate how truth and falsity, as well as validity and invalidity, can appear in various combinations in an argument. She then introduces the concept of a sound argument (i.e., a valid argument whose premises are all true) and presents one reason to think that valid arguments with false premises are also of interest. \u00a0For more detailed discussions of validity and soundness, please be sure to have a look at the videos on these topics by Paul Henne (Duke University) and Aaron Ancell (Duke University), respectively.\n\nSpeaker: Julianne Chung, Yale University", "slug": "critical-thinking-truth-and-validity"}, {"path": "khan/partner-content/wi-phi/critical-thinking/validity_1/", "id": "validity", "title": "Validity", "description": "Test your knowledge of validity!", "slug": "validity_1", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/soundness/", "id": "3P0fUHUaZcs", "title": "Fundamentals: Soundness", "kind": "Video", "description": "Aaron Ancell discusses the philosophical concept of soundness. After reviewing validity, he defines soundness: an argument is sound when it is valid and has all true premises. He reviews a few examples of sound and unsound arguments, and he encourages you to develop sound arguments on your own.\n\nSpeaker: Aaron Ancell, Duke University", "slug": "soundness"}, {"path": "khan/partner-content/wi-phi/critical-thinking/soundness_1/", "id": "soundness", "title": "Soundness", "description": "Test your knowledge of soundness!", "slug": "soundness_1", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/formal-informal-fallacy/", "id": "T_yFszI7Aso", "title": "Fallacies: Formal and Informal Fallacies", "kind": "Video", "description": "In this video, Paul describes the distinction between formal and informal fallacies. This distinction is useful for understanding the fallacies in Wi-Phi's Critical Thinking section.\n\nSpeaker: Paul Henne", "slug": "formal-informal-fallacy"}, {"path": "khan/partner-content/wi-phi/critical-thinking/formal-and-informal-fallacies/", "id": "formal-and-informal-fallacies", "title": "Formal and Informal Fallacies", "description": "Test your knowledge of the distinction between formal and informal fallacies!", "slug": "formal-and-informal-fallacies", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/fallacy-of-composition/", "id": "JELm6peL_sI", "title": "Fallacies: Fallacy of Composition", "kind": "Video", "description": "In this video, Paul Henne describes the fallacy of composition, an informal fallacy that arises when we assume that some whole has the same properties as its parts. He also discusses why there aren't colorless cats.\n\nSpeaker: Paul Henne", "slug": "fallacy-of-composition"}, {"path": "khan/partner-content/wi-phi/critical-thinking/fallacy-of-division/", "id": "uEhRqiSA4ko", "title": "Fallacies: Fallacy of Division", "kind": "Video", "description": "In this video, Paul Henne describes the fallacy of division, the informal fallacy that arises when we assume that the parts of some whole must have the same properties as the whole they make up. He also discusses why water molecules aren't wet.\u00a0\n\nSpeaker: Paul Henne", "slug": "fallacy-of-division"}, {"path": "khan/partner-content/wi-phi/critical-thinking/division-and-composition/", "id": "division-and-composition", "title": "Division and Composition", "description": "Test your knowledge of the distinction between the fallacy of division and the fallacy of composition.", "slug": "division-and-composition", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/critical-thinking-introduction-to-ad-hominem-fallacies/", "id": "wnbK76m691I", "title": "Fallacies: Introduction to Ad Hominem", "kind": "Video", "description": "In this video, Julianne Chung offers a brief introduction to ad hominem fallacies, or fallacies of personal attack. She surveys six different types (abusive ad hominem, circumstantial ad hominem, tu quoque, guilt by association, genetic fallacy, and ad feminam), offering examples of each along the way. For a more detailed discussion of ad hominem fallacies, please see the video on ad hominem fallacies by Paul Henne.\n\nSpeaker: Julianne Chung, Yale University", "slug": "critical-thinking-introduction-to-ad-hominem-fallacies"}, {"path": "khan/partner-content/wi-phi/critical-thinking/ad-hominem/", "id": "qBkj-AYYg7w", "title": "Fallacies: Ad Hominem", "kind": "Video", "description": "In this video, Paul Henne describes the ad hominem fallacy, which is an informal fallacy that arises when someone attacks the person making the argument rather than their argument. He also describes the four subtypes of this fallacy.\n\nSpeaker: Paul Henne", "slug": "ad-hominem"}, {"path": "khan/partner-content/wi-phi/critical-thinking/ad-hominem-part-1/", "id": "ad-hominem-part-1", "title": "Ad Hominem, Part 1", "description": "Test your knowledge of the ad hominem fallacy!", "slug": "ad-hominem-part-1", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/ad-hominem-part-2/", "id": "ad-hominem-part-2", "title": "Ad Hominem, Part 2", "description": "Test your knowledge of ad hominem fallacies!", "slug": "ad-hominem-part-2", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/affirming-the-consequent/", "id": "2ArXbUhbikQ", "title": "Fallacies: Affirming the Consequent", "kind": "Video", "description": "In this video, Matthew C. Harris explains the fallacy of affirming the consequent, the formal fallacy that arises from inferring the converse of an argument. He also explains why you sometimes cannot conclude that you should bathe in a tub of\u00a0peanut\u00a0butter.\n\nSpeaker: Matthew C. Harris", "slug": "affirming-the-consequent"}, {"path": "khan/partner-content/wi-phi/critical-thinking/denying-the-antecedent/", "id": "kzpDXYJXNy0", "title": "Fallacies: Denying the Antecedent", "kind": "Video", "description": "In this video, Matthew C. Harris explains the fallacy of denying the antecedent, the formal fallacy that arises from inferring the inverse of a conditional statement. He also explains why graduate students might also be humans.\n\nSpeaker: Matthew C. Harris", "slug": "denying-the-antecedent"}, {"path": "khan/partner-content/wi-phi/critical-thinking/denying-the-antecedent-and-affirming-the-consequent/", "id": "denying-the-antecedent-and-affirming-the-consequent", "title": "Denying the Antecedent and Affirming the Consequent", "description": "Test your knowledge of the fallacies of denying the antecedent and affirming the consequent!", "slug": "denying-the-antecedent-and-affirming-the-consequent", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/post-hoc/", "id": "5A7hSaoRv0g", "title": "Fallacies: Post Hoc Ergo Propter Hoc", "kind": "Video", "description": "In this video, Paul explains the post-hoc-ergo-propter-hoc fallacy. This is an informal fallacy committed when a person reasons that because one event happened after another event, the first event caused the second. He also discusses why it is sometimes hasty to conclude that your cat scratch caused your fever.\n\nSpeaker: Paul Henne, Duke University", "slug": "post-hoc"}, {"path": "khan/partner-content/wi-phi/critical-thinking/post-hoc-ergo-propter-hoc/", "id": "post-hoc-ergo-propter-hoc", "title": "Post Hoc Ergo Propter Hoc", "description": "Test your knowledge of the post hoc ergo propter hoc fallacy!", "slug": "post-hoc-ergo-propter-hoc", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/appeal-to-the-people/", "id": "aF6EHTtyYqw", "title": "Fallacies: Appeal to the People", "kind": "Video", "description": "In this video, Jordan MacKenzie discusses a type of informal fallacy known as the argumentum ad populum fallacy, or the appeal to the people fallacy. This fallacy occurs when one attempts to establish the truth of a conclusion by appealing to the fact that the conclusion is widely believed to be true.\n\nSpeaker: Jordan MacKenzie, University of North Carolina at Chapel Hill", "slug": "appeal-to-the-people"}, {"path": "khan/partner-content/wi-phi/critical-thinking/begging-the-question/", "id": "IODR5mJMwOU", "title": "Fallacies: Begging the Question", "kind": "Video", "description": "In this video Matthew C. Harris of Duke University explains the informal logical fallacy called begging the question and the associated concept of circular reasoning.\n\nSpeaker: Matthew C. Harris", "slug": "begging-the-question"}, {"path": "khan/partner-content/wi-phi/critical-thinking/begging-the-question_1/", "id": "begging-the-question", "title": "Begging the Question", "description": "Test your knowledge of the fallacy of begging the question!", "slug": "begging-the-question_1", "kind": "Exercise"}, {"path": "khan/partner-content/wi-phi/critical-thinking/alief/", "id": "TCBALVumrUQ", "title": "Cognitive Biases: Alief", "kind": "Video", "description": "In this video, the psychologist Laurie Santos (Yale University) explains the philosopher Tamar Gendler (Yale University)'s concept of alief \u2014 an automatic or habitual mental attitude. The video discusses why aliefs differ from beliefs and how aliefs can affect our important decisions more than we expect.\n\nSpeaker: Dr.\u00a0Laurie Santos, Associate Professor of Psychology, Yale University", "slug": "alief"}, {"path": "khan/partner-content/wi-phi/critical-thinking/anchoring/", "id": "NFiDdbquWJY", "title": "Cognitive Biases: Anchoring", "kind": "Video", "description": "In this video, the cognitive scientist Laurie Santos (Yale University) explains the phenomenon of anchoring. She shows how arbitrary information sometimes can sometimes act as an anchor that affects our judgments in unexpected ways.\n\nSpeaker: Dr. Laurie Santos, Associate Professor of Psychology, Yale University", "slug": "anchoring"}, {"path": "khan/partner-content/wi-phi/critical-thinking/pricing-biases/", "id": "roRIPM3i0ZM", "title": "Cognitive Biases: Pricing Biases", "kind": "Video", "description": "Laurie Santos (Yale University) examines how people's economic choices tend to confuse price and value. She then describes how these so-called pricing biases compel us to incorrectly assume that higher priced goods will often work and taste better.\n\nSpeaker: Dr.\u00a0Laurie Santos, Associate Professor of Psychology, Yale University", "slug": "pricing-biases"}, {"path": "khan/partner-content/wi-phi/critical-thinking/reference-dependence-loss-aversion/", "id": "LBNtChg4t4k", "title": "Cognitive Biases: Reference Dependence and Loss Aversion", "kind": "Video", "description": "Laurie Santos, a psychologist at Yale University, explains two of our classic economic biases: reference dependence and loss aversion. Using a classic scenario from Kahneman and Tversky\u2019s studies, she explores how these two biases violate economic rationality and how they affect the choices we make every day.\n\nSpeaker: Dr.\u00a0Laurie Santos, Associate Professor of Psychology, Yale University", "slug": "reference-dependence-loss-aversion"}, {"path": "khan/partner-content/wi-phi/critical-thinking/mental-accounting/", "id": "4TuQ7YI-soQ", "title": "Cognitive Biases: Mental Accounting", "kind": "Video", "description": "The psychologist Laurie Santos (Yale University) explains the phenomenon of mental accounting: why we don't always assume that money is fungible. She explores why we set up different accounts for different purchases and how we can use our mental accounting biases to be happier about our financial decisions.\n\nSpeaker: Dr.\u00a0Laurie Santos, Associate Professor of Psychology, Yale University", "slug": "mental-accounting"}, {"path": "khan/partner-content/wi-phi/critical-thinking/peak-end-effect/", "id": "RhyJGwNpEcw", "title": "Cognitive Biases: Peak-End Effect", "kind": "Video", "description": "In this video, Laurie Santos (Yale University) explains why our memories of good and bad events are a biased. Specifically, she explains how our retrospective evaluations fall prey to the peak-end effect\u2014 a bias in which we overweight the peak and end of our everyday experiences\u2014 and how this bias leads us to ignore other features of the event like its duration.\n\nSpeaker: Dr.\u00a0Laurie Santos, Associate Professor of Psychology, Yale University", "slug": "peak-end-effect"}, {"path": "khan/partner-content/wi-phi/critical-thinking/gi-joe-fallacy/", "id": "sO9xwAyeWX0", "title": "Cognitive Biases: The GI Joe Fallacy", "kind": "Video", "description": "In this video, Laurie Santos (Yale University) discusses why knowing about our cognitive biases is not enough to overcome them. She\u2019ll introduce a new cognitive error known as the G.I. Joe Fallacy, the tendency for our biases to stick around even when we should know better.\n\nSpeaker: Dr.\u00a0Laurie Santos, Associate Professor of Psychology, Yale University", "slug": "gi-joe-fallacy"}], "in_knowledge_map": false, "description": "The critical thinking section will teach you the skills to think clearly and independently. It will help you identify valid arguments, detect inconsistencies in reasoning, understanding logical connections between ideas, and construct and evaluate arguments.", "node_slug": "critical-thinking", "render_type": "Tutorial", "topic_page_url": "/partner-content/wi-phi/critical-thinking", "extended_slug": "partner-content/wi-phi/critical-thinking", "kind": "Topic", "slug": "critical-thinking"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/wi-phi/metaphys-epistemology/", "id": "metaphys-epistemology", "hide": false, "title": "Metaphysics and Epistemology", "child_data": [{"kind": "Video", "id": "x11351e2b"}, {"kind": "Video", "id": "x2e1e1e2c"}, {"kind": "Video", "id": "xf79e8eb2"}, {"kind": "Video", "id": "xd62de875"}, {"kind": "Video", "id": "x684844b0"}, {"kind": "Video", "id": "xb0c1d6f9"}, {"kind": "Video", "id": "x4f28c557"}, {"kind": "Video", "id": "xb347173d"}, {"kind": "Video", "id": "x221731c8"}, {"kind": "Video", "id": "x40170f75"}, {"kind": "Video", "id": "xc091a1c7"}, {"kind": "Video", "id": "x1802e703"}, {"kind": "Video", "id": "x5108cfb8"}, {"kind": "Video", "id": "x9c020c6d"}, {"kind": "Video", "id": "x58cba84e"}, {"kind": "Video", "id": "x40a820ee"}, {"kind": "Video", "id": "xb6aae30e"}, {"kind": "Video", "id": "x0ddc17e6"}, {"kind": "Video", "id": "x1003e237"}, {"kind": "Video", "id": "x2ffe0203"}, {"kind": "Video", "id": "xa9c67fed"}, {"kind": "Video", "id": "x986b3d04"}, {"kind": "Video", "id": "x8b28984c"}, {"kind": "Video", "id": "x9c5199a7"}, {"kind": "Video", "id": "xba8795e2"}, {"kind": "Video", "id": "x93e7e232"}, {"kind": "Video", "id": "x7999713e"}, {"kind": "Video", "id": "xa9336498"}, {"kind": "Video", "id": "x19b564bd"}], "children": [{"path": "khan/partner-content/wi-phi/metaphys-epistemology/ship-of-theseus/", "id": "dYAoiLhOuao", "title": "Metaphysics: Ship of Theseus", "kind": "Video", "description": "Jenn introduces us to a puzzle that has bedeviled philosophy since the ancient Greeks: the Ship of Theseus. She tells the Ship of Theseus story, and draws out the more general question behind it: what does it take for an object to persist over time? She then breaks this ancient problem down with modern clarity and rigor.\n\nSpeaker: Dr.\u00a0Jennifer Wang, Lecturer, Stanford University", "slug": "ship-of-theseus"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/problem-of-free-will/", "id": "iSfXdNIolQA", "title": "Metaphysics: Problem of Free Will", "kind": "Video", "description": "Richard discusses one of the classic philosophical problem of free will --- that is, the question of whether we decide things for ourselves, or are forced to go one way or another. He distinguishes between two different worries. One worry is that the laws of physics, plus facts about the past over which we have no control, determine what we will do, and that means we\u2019re not free. Another worry is that because the laws and the past determine what we\u2019ll do, someone smart enough could know what we would do ahead of time, so we can\u2019t be free. He says the second worry is much worse than the first, but argues that the second doesn\u2019t follow from the first.\n\nSpeaker: Dr. Richard Holton,\u00a0Professor of Philosophy, Massachusetts Institute of Technology", "slug": "problem-of-free-will"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/the-grandfather-paradox/", "id": "M8oITAoaCr4", "title": "Metaphysics: The Grandfather Paradox", "kind": "Video", "description": "Agust\u00edn Rayo explains the grandfather paradox, one of the classic paradoxes of time travel.\n\nSpeaker:\u00a0Dr.\u00a0Agust\u00edn Rayo, Professor of Philosophy, MIT", "slug": "the-grandfather-paradox"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/sizes-of-infinity-part-1-hilberts-hotel/", "id": "p1KkXA0vKsQ", "title": "Metaphysics: Sizes of Infinity, Part 1 (Hilbert's Hotel)", "kind": "Video", "description": "Part 1 of a pair. Agustin teaches us about some weird properties of infinity, using an example due to mathematician David Hilbert called 'Hilbert's Hotel'. He shows us a result proved by another mathematician, Georg Cantor: that many infinite collections of things are the same size. Things that are the same size include: the natural numbers, the natural number plus one, the natural numbers plus the natural numbers, and as many copies of the natural numbers as there are natural numbers! Amazing!\n\nSpeaker: Dr. Agust\u00edn Rayo, Professor of Philosophy, MIT", "slug": "sizes-of-infinity-part-1-hilberts-hotel"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/sizes-of-infinity-part-2-getting-real/", "id": "5uKGX1lt6ZY", "title": "Metaphysics: Sizes of Infinity, Part 2 (Getting Real)", "kind": "Video", "description": "Part 2 of a pair. After part 1, you might have thought that all different infinite collections of things are the same size. Not so! In this video, Agustin shows us another of Georg Cantor\u2019s results: that for every size of infinity, there is a bigger one! An example: there are way more real numbers than there are natural numbers.\n\nSpeaker:\u00a0Dr.\u00a0Agust\u00edn Rayo, Professor of Philosophy, MIT", "slug": "sizes-of-infinity-part-2-getting-real"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/mind-body-dualism/", "id": "AMTMtWHclKo", "title": "Mind: Mind-Body Dualism", "kind": "Video", "description": "Are we just physical things? Or perhaps just mental things? Maybe both? In this video, Alex Byrne (MIT) explains a modern argument due to Saul Kripke for mind-body dualism.\n\nSpeaker: Dr. Alex Byrne, Professor of Philosophy, MIT", "slug": "mind-body-dualism"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/the-true-self/", "id": "rMYdKz4xxMc", "title": "Mind: The True Self", "kind": "Video", "description": "Does our ordinary notion of a \u201ctrue self\u201d simply pick out a certain part of the mind? Or is this notion actually wrapped up in some inextricable way with our own values and ideals?\n\nSpeaker: Dr.\u00a0Joshua Knobe,\u00a0Professor of Philosophy and Cognitive Science, Yale University", "slug": "the-true-self"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/personal-identity/", "id": "b5kDRza-Xqs", "title": "Mind: Personal Identity", "kind": "Video", "description": "Using the method of experimental philosophy, Nina Strohminger (Yale University) and Shaun Nichols (University of Arizona) compare philosophical and everyday answers to the question \"Which aspect of the self is most essential for personal identity?\"\n\nSpeakers: Dr. Nina Strohminger, Yale University and Shaun Nichols, University of Arizona", "slug": "personal-identity"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/meaning-and-language/", "id": "-6hoDNZoV5g", "title": "Language: Meaning and Language", "kind": "Video", "description": "Kate\u00a0explores the connection between language and meaning. This video introduces two ways in which philosophers have answered the question 'what makes a sound or some marks meaningful?'.\u00a0\n\nSpeaker: Dr. Kate Ritche, \u00a0Assistant Professor of Philosophy, City College of New York", "slug": "meaning-and-language"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/gricean-pragmatics/", "id": "we6uSVf4qss", "title": "Language: Gricean Pragmatics", "kind": "Video", "description": "Karen explores the relationship between language and communication, looking at the question of how it is that people regularly use words to communicate more than their literal meanings.\u00a0 This video introduces us to the most philosophically influential theory on this matter, H.P. Grice\u2019s theory of pragmatics.\n\nSpeaker: Dr. Karen Lewis, Barnard College, Columbia University", "slug": "gricean-pragmatics"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/conventional-implicature/", "id": "YD82l_bUhLc", "title": "Language: Conventional Implicature", "kind": "Video", "description": "William introduces us to different aspects of meaning, as studied by linguistics and philosophers. He tells us about the difference between the literal meaning of a sentence someone says, and what they intend to convey by using that sentence at that particular time.\n\nSpeaker: Dr. William Salmon, Assistant Professor of Linguistics,\u00a0University of Minnesota Duluth", "slug": "conventional-implicature"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/conditionals-pt1/", "id": "4Zxp2-_pLCE", "title": "Language: Conditionals, Part 1", "kind": "Video", "description": "Justin invites us to think about conditional sentences (\"if P then Q\"). Perhaps surprisingly, the question of what these sentences mean has vexed philosophers for thousands of years. In part one, Justin motivates the question and introduces one of the oldest answers to it, the material conditional theory.\u00a0\n\nSpeaker: Dr. Justin Khoo, Assistant Professor, MIT", "slug": "conditionals-pt1"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/conditionals-pt-2/", "id": "Xs6E-FEls1c", "title": "Language: Conditionals, Part 2", "kind": "Video", "description": "Justin Khoo invites us to think about conditional sentences (\"if P then Q\"). Perhaps surprisingly, the question of what these sentences mean has vexed philosophers for thousands of years. In part 2 of the series on conditionals, Justin discusses some of the challenges facing the material conditional theory.\n\nSpeaker: Dr. Justin Khoo, Assistant Professor, M.I.T.", "slug": "conditionals-pt-2"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/conditionals-pt3/", "id": "Oxt1DdfT8ME", "title": "Language: Conditionals, Part 3", "kind": "Video", "description": "In part 3 of the series on conditionals, Justin picks up where part 2\u00a0leaves off, introducing an alternative theory of conditionals: the strict conditional theory. According to the strict theory, conditionals express necessary connections between their antecedent and consequent. Justin shows how this theory avoids the problems facing the material conditional theory. However, the strict theory turns out to face a similar problem of its own!\n\nSpeaker: Dr. Justin Khoo, Assitant Professor, M.I.T.", "slug": "conditionals-pt3"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/conditionals-pt4/", "id": "W0BG49ir32E", "title": "Language: Conditionals, Part 4", "kind": "Video", "description": "In this video, Justin picks up where part 3 left off. \u00a0He introduces the Conditional Assertion Theory of conditionals, which aims to resolve the problems presented for the other theories of conditionals. In the end, Justin presents yet another problem for this radical new theory.\n\nSpeaker: Dr. Justin Khoo, Assistant Professor, MIT", "slug": "conditionals-pt4"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/argument-and-evidence/", "id": "rCnb7vapl5o", "title": "Epistemology: Argument and Evidence", "kind": "Video", "description": "Greg discusses the role of argument and evidence in deciding what to believe, both in philosophy and more generally.\n\nSpeaker: Dr.\u00a0Greg Ganssle, Senior Fellow, Rivendell Institute, Yale University", "slug": "argument-and-evidence"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/science-can-it-teach-us-everything/", "id": "o6ooV-19NLY", "title": "Epistemology: Science, Can It Teach Us Everything?", "kind": "Video", "description": "Caspar asks: can science tell us everything there is to know about the world? He tells us about a famous argument that it can't, sometimes called 'the knowledge argument' or 'the Mary argument', due to philosopher Frank Jackson. If the argument is right, then there are certain aspects of the world that we can't learn about through science. In particular, we can't use science to learn what it is like to see red, or taste coffee, or have other experiences.\n\nSpeaker: Dr. Caspar Hare, Associate Professor, MIT", "slug": "science-can-it-teach-us-everything"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/will-to-believe/", "id": "uzmLXIuAspQ", "title": "Epistemology: The Will to Believe", "kind": "Video", "description": "Tom asks whether it is moral to believe something even when you have no evidence that it is true. He discusses a classic debate on that subject, between philosophers William James and William Clifford.\n\nSpeaker: Dr. Thomas Donaldson, Assistant Professor of Philosophy, Stanford University", "slug": "will-to-believe"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/reason-and-faith/", "id": "MTPHXNMi9tA", "title": "Epistemology: Reason and Faith", "kind": "Video", "description": "It is common to think that Faith and Reason must be in conflict. Often this view emerges because how we use the term \"believe\" is ambiguous. In this video we clarify how this term is used and how Faith and Reason can be properly related.\n\nSpeaker: Dr. Greg Ganssle", "slug": "reason-and-faith"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/sleeping-beauty-problem/", "id": "5Cqbf86jTro", "title": "Epistemology: Sleeping Beauty", "kind": "Video", "description": "In this video, Michael introduces the Sleeping Beauty problem. This is a problem in formal epistemology about how to correctly assign probabilities to an odd scenario in which we flip a coin and, depending on the outcome, wake Sleeping Beauty up according to two different patterns. We\u2019ll discover some very strange consequences for our beliefs as a result.\n\nSpeaker: Michael Campbell, Duke University", "slug": "sleeping-beauty-problem"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/the-monty-hall-problem/", "id": "_X5erR9LKUs", "title": "Epistemology: The Monty Hall Problem", "kind": "Video", "description": "The Monty Hall problem is a strange result arising from a very simple situation. In this video, Bryce Gessell explains why it seems so counterintuitive and why the solution isn't counterintuitive at all.\n\nSpeaker: Bryce Gessell, Duke University", "slug": "the-monty-hall-problem"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/rationality/", "id": "lInyN-WD9u4", "title": "Epistemology: Rationality", "kind": "Video", "description": "Ram Neta (University of North Carolina, Chapel Hill) considers whether we're as rational as we often think we are. Help us caption & translate this video!\n\nSpeaker: Dr. Ram Neta, Professor of Philosophy, University of North Carolina, Chapel Hill", "slug": "rationality"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/paradoxes-of-perception/", "id": "bs2pTBkJCxQ", "title": "Epistemology: Paradoxes of Perception", "kind": "Video", "description": "In this video, Dr. Eugen Fischer (UEA) presents the \u2018argument from illusion\u2019. This argument appears to refute our common-sense conception of perception (seeing, hearing, etc.). Together with parallel arguments, it raises the problem of perception that has been a lynch-pin of Western philosophy, since the mid-18th century.\n\nSpeaker: Dr. Eugen Fischer, Associate Professor of Philosophy, University of East Anglia", "slug": "paradoxes-of-perception"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/paradox-of-the-ravens/", "id": "_SKmqh5Eu4Y", "title": "Epistemology: The Paradox of the Ravens", "kind": "Video", "description": "In this video, Marc Lange (UNC) introduces the paradox of confirmation, one that arises from instance confirmation, the equivalence condition, and common inference rules of logic.\n\nSpeaker: Dr. Marc Lange, Professor of Philosophy, University of North Carolina at Chapel Hill", "slug": "paradox-of-the-ravens"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/puzzle-of-grue/", "id": "1rUCyg4Ppso", "title": "Epistemology: The Puzzle of Grue", "kind": "Video", "description": "In this video, Sinan Dogramaci (The University of Texas at Austin) explains the puzzle of grue. He discusses how this puzzle undercut the attempt to formally develop inductive logic, the logic of probabilistic support.\n\nSpeaker: Dr. Sinan Dogramaci, Assistant Professor of Philosophy, University of Texas at Austin", "slug": "puzzle-of-grue"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/cosmological-argument-part-1/", "id": "2zS1HiuWPMA", "title": "Religion: Cosmological Argument, Part 1", "kind": "Video", "description": "Part 1 of a pair. Tim lays out a classic argument for the existence of God, called 'The Cosmological Argument' -- roughly, the idea that something has to explain why the world is the way it is, and that something is God. He distinguishes two versions: the Beginnings Argument, and the Modal Argument. He covers the Beginnings Argument.\n\nSpeaker: Dr. Timothy Yenter, Assistant Professor of Philosophy, University of Mississippi", "slug": "cosmological-argument-part-1"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/cosmological-argument-part-2/", "id": "mBMAMIFw9n4", "title": "Religion: Cosmological Argument, Part 2", "kind": "Video", "description": "Part 2 of a pair. Tim moves on to the version of the Cosmological Argument for the existence of God called 'the Modal Argument.' The idea is that all the contingent facts about the world need to be explained by some necessary fact, and that necessary fact is that God exists.\n\nSpeaker: Dr.\u00a0Timothy Yenter, Assistant Professor of Philosophy, University of Mississippi", "slug": "cosmological-argument-part-2"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/classical-theism-part-1/", "id": "AxmY2n3LS8M", "title": "Religion: Classical Theism, Part 1", "kind": "Video", "description": "In this video, Elmar Kremer (University of Toronto) introduces two theories of the nature of God: classical theism and theistic personalism. In part 1, he considers the arguments that have been made for each theory.\n\nSpeaker: Dr. Elmar Kremer, Emeritus Professor, University of Toronto", "slug": "classical-theism-part-1"}, {"path": "khan/partner-content/wi-phi/metaphys-epistemology/classical-theism-part-2/", "id": "jpdn1oH_0yo", "title": "Religion: Classical Theism, Part 2", "kind": "Video", "description": "In this video, Elmar Kremer (University of Toronto) introduces two theories of the nature of God: classical theism and theistic personalism. In part 2, he considers several arguments for and against classical theism.\n\nSpeaker: Dr. Elmar Kremer, Emeritus Professor, University of Toronto", "slug": "classical-theism-part-2"}], "in_knowledge_map": false, "description": "Metaphysics is an area of philosophy concerned with what there is in the universe (ontology) and the nature of what exists. Epistemology is a related area interested in knowledge and how we know things about the universe.", "node_slug": "metaphys-epistemology", "render_type": "Tutorial", "topic_page_url": "/partner-content/wi-phi/metaphys-epistemology", "extended_slug": "partner-content/wi-phi/metaphys-epistemology", "kind": "Topic", "slug": "metaphys-epistemology"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/wi-phi/value-theory-1/", "id": "value-theory-1", "hide": false, "title": "Value Theory", "child_data": [{"kind": "Video", "id": "x897c3d2e"}, {"kind": "Video", "id": "xf2956dc7"}, {"kind": "Video", "id": "x5dcef9c2"}, {"kind": "Video", "id": "x73cb214e"}, {"kind": "Video", "id": "x1c4db736"}, {"kind": "Video", "id": "xc28feeda"}, {"kind": "Video", "id": "x3440608b"}, {"kind": "Video", "id": "xfa33d4fc"}, {"kind": "Video", "id": "x2c9b09ef"}, {"kind": "Video", "id": "xb148d7b7"}, {"kind": "Video", "id": "x09bdcea3"}, {"kind": "Video", "id": "xb0800f0a"}, {"kind": "Video", "id": "x904a1482"}, {"kind": "Video", "id": "xf0d68cc0"}, {"kind": "Video", "id": "x80a212d7"}, {"kind": "Video", "id": "x7c311968"}, {"kind": "Video", "id": "x8cf8d414"}, {"kind": "Video", "id": "x94eb0898"}, {"kind": "Video", "id": "x0819f438"}, {"kind": "Video", "id": "xedb30948"}, {"kind": "Video", "id": "xf60534f3"}, {"kind": "Video", "id": "x97c018a5"}, {"kind": "Video", "id": "x79a04766"}, {"kind": "Video", "id": "xcccfd537"}, {"kind": "Video", "id": "x89e81c01"}, {"kind": "Video", "id": "x0ffc4b4d"}], "children": [{"path": "khan/partner-content/wi-phi/value-theory-1/problem-of-evil/", "id": "9pRzyioUKp0", "title": "Ethics: The Problem of Evil", "kind": "Video", "description": "Sally discusses a classic argument that God does not exist, called 'The Problem of Evil'. Along the way, she distinguishes different ways in which people believe that God exists, and discusses what's bad about having contradictory beliefs.\n\nSpeaker: Dr. Sally Haslanger,\u00a0Ford Professor of Philosophy and\u00a0Women's & Gender Studies, MIT", "slug": "problem-of-evil"}, {"path": "khan/partner-content/wi-phi/value-theory-1/problem-of-evil-part-1/", "id": "V4z9Y2u30Qs", "title": "Ethics: Problem of Evil, Part 1", "kind": "Video", "description": "Part 1 of a trilogy. Greg lays out a classic argument that God does not exist, called \u2018The Problem of Evil\u2019. He distinguishes two versions of that argument, which are sometimes called \u2018the deductive\u2019 and \u2018the evidential\u2019 version. He goes into some details on the deductive version.\n\nSpeaker: Dr. Greg Ganssle, Senior Fellow Rivendell Institute, Yale University", "slug": "problem-of-evil-part-1"}, {"path": "khan/partner-content/wi-phi/value-theory-1/problem-of-evil-part-2/", "id": "prWSGbDW3LU", "title": "Ethics: Problem of Evil, Part 2", "kind": "Video", "description": "Part 2 of a trilogy. Here, Greg gives a response to the deductive version of the Problem of Evil on behalf of someone who believes that God exists. In thinking about this response, we need to think about whether God can make contradictions true, and whether God can have good reasons for allowing bad things to happen.\n\nSpeaker: Dr.\u00a0Greg Ganssle, Senior Fellow, Rivendell Institute, Yale University", "slug": "problem-of-evil-part-2"}, {"path": "khan/partner-content/wi-phi/value-theory-1/problem-of-evil-part-3/", "id": "L67dlpMgDa4", "title": "Ethics: Problem of Evil, Part 3", "kind": "Video", "description": "Part 3 of a trilogy. Greg considers the evidential version of the Problem of Evil, and gives a response on behalf of someone who believes that God exists. This involves considering whether God might have a good reason to allow bad things to happen.\n\nSpeaker: Dr.\u00a0Greg Ganssle, Senior Fellow, Rivendell Institute, Yale University", "slug": "problem-of-evil-part-3"}, {"path": "khan/partner-content/wi-phi/value-theory-1/god-morality-part-1/", "id": "lmhiibdwznQ", "title": "Ethics: God and Morality, Part 1", "kind": "Video", "description": "Part 1 of a pair. Stephen considers the relationship between morality and God. Specifically, he asks: is morality the same thing as the commands of God? Is there no morality if there is no God? Ultimately, Stephen will argue that morality and God's commands are distinct, even if there is a God and she commands moral things. However, in this first video, Steve considers why you might like the view that morality just is God's commands.\n\nSpeaker: Dr. Stephen Darwall, Andrew Downey Orrick Professor of Philosophy, Yale University", "slug": "god-morality-part-1"}, {"path": "khan/partner-content/wi-phi/value-theory-1/god-morality-part-2/", "id": "x726HASktrQ", "title": "Ethics: God and Morality, Part 2", "kind": "Video", "description": "Part 2 of a pair. Stephen considers the relationship between morality and God. Specifically, he asks: is morality the same thing as the commands of God? Is there no morality if there is no God? Stephen thinks the answer to both these questions is 'no'. He argues that, if you believe God exists and that we should follow his commands *for certain reasons*, then you should *not* think that morality just is whatever God commands.\n\nSpeaker:\u00a0Dr.\u00a0Stephen Darwall, Andrew Downey Orrick Professor of Philosophy, Yale University", "slug": "god-morality-part-2"}, {"path": "khan/partner-content/wi-phi/value-theory-1/moral-status/", "id": "smuhAjyRbw0", "title": "Ethics: Moral Status", "kind": "Video", "description": "Jeff discusses the nature of moral status. What does it take for someone to be a subject of moral concern? Do they have to be human? Rational? Sentient? Alive? And how does our answer to this question affect how we should act in everyday life?\n\nSpeaker: Dr. Jeff Sebo, Research Fellow, Department of Bioethics, The National Institutes of Health", "slug": "moral-status"}, {"path": "khan/partner-content/wi-phi/value-theory-1/killing-animals-for-food/", "id": "3HAMk_ZYO7g", "title": "Ethics: Killing Animals for Food", "kind": "Video", "description": "In this video, Tyler asks why it is morally permissible to kill animals for food. He offers a few explanations that seem unsatisfactory. So, he asks you for help answering this question about animals ethics.\n\nSpeaker: Tyler Doggett", "slug": "killing-animals-for-food"}, {"path": "khan/partner-content/wi-phi/value-theory-1/hedonism-and-the-experience-machine/", "id": "yJ1dsNauhGE", "title": "Ethics: Hedonism and The Experience Machine", "kind": "Video", "description": "What makes our life go best? Is being happy all that matters? Is a life of blissful ignorance a good life? Or is there more to a good life than this? Richard Rowland discusses whether we should take the blue pill in 'hedonism and the experience machine\u2019.\nSpeaker: Dr. Richard Rowland, Departmental Lecturer, Somerville College, University of Oxford", "slug": "hedonism-and-the-experience-machine"}, {"path": "khan/partner-content/wi-phi/value-theory-1/consequentialism/", "id": "hACdhD_kes8", "title": "Ethics: Consequentialism", "kind": "Video", "description": "In this video, Julia Driver (Washington University in St. Louis) introduces us to the ethical theory of consequentialism. Help us caption & translate this video!\n\nSpeaker: Dr. Julia Driver, Professor of Philosophy, Washington University at St. Louis", "slug": "consequentialism"}, {"path": "khan/partner-content/wi-phi/value-theory-1/utilitarianism-part-1/", "id": "uvmz5E75ZIA", "title": "Ethics: Utilitarianism, Part 1", "kind": "Video", "description": "Julia Markovits (Cornell University) gives an introduction to the moral theory of utilitarianism. Utilitarianism is the view that the right moral action is the one that maximizes happiness for all.\n\nSpeaker: Dr. Julia Markovits, Associate Professor, Sage School of Philosophy, Cornell Universtiy", "slug": "utilitarianism-part-1"}, {"path": "khan/partner-content/wi-phi/value-theory-1/utilitarianism-part-2/", "id": "uGDk23Q0S9E", "title": "Ethics: Utilitarianism, Part 2", "kind": "Video", "description": "Julia Markovits (Cornell University) gives an introduction to the moral theory of utilitarianism. Utilitarianism is the view that the right moral action is the one that maximizes happiness for all.\nSpeaker: Dr.\u00a0Julia Markovits, Associate Professor, Sage School of Philosophy, Cornell Universtiy", "slug": "utilitarianism-part-2"}, {"path": "khan/partner-content/wi-phi/value-theory-1/utilitarianism-part-3/", "id": "MoCuVa9UeR4", "title": "Ethics: Utilitarianism, Part 3", "kind": "Video", "description": "Julia Markovits (Cornell University) gives an introduction to the moral theory of utilitarianism. Utilitarianism is the view that the right moral action is the one that maximizes happiness for all.\n\nSpeaker: Dr.\u00a0Julia Markovits, Associate Professor, Sage School of Philosophy, Cornell Universtiy", "slug": "utilitarianism-part-3"}, {"path": "khan/partner-content/wi-phi/value-theory-1/the-problem-of-moral-luck/", "id": "HvqJ-s26ol4", "title": "Ethics: The Problem of Moral Luck", "kind": "Video", "description": "Victor Kumar (Michigan) introduces the problem of moral luck and surveys potential solutions. We see how the problem arises out of a clash between intuitive reactions to cases and an abstract principle of moral responsibility.\u00a0\n\nSpeaker: Dr. Victor Kumar, Postdoctoral Research Fellow, University of Michigan, Ann Arbor", "slug": "the-problem-of-moral-luck"}, {"path": "khan/partner-content/wi-phi/value-theory-1/the-nonidentity-problem/", "id": "abPkNFzxeE4", "title": "Ethics: The Nonidentity Problem", "kind": "Video", "description": "In this video, Molly introduces the nonidentity problem. This problem arises in cases where an individual appears to be wronged by the very action upon which his or her own existence depends. We\u2019ll see why this problem has implications for reproductive choices, genetic engineering, and whether we should take care of the environment for the sake of future generations.\n\nSpeaker: Dr. Molly Gardner, Assistant Professor of Philosophy, Bowling Green State University", "slug": "the-nonidentity-problem"}, {"path": "khan/partner-content/wi-phi/value-theory-1/the-nonidentity-problem-part-2/", "id": "oKpsU7sVwjc", "title": "Ethics: The Nonidentity Problem, Part 2", "kind": "Video", "description": "In this video, Molly Gardner introduces the nonidentity problem. This problem arises in cases where an individual appears to be wronged by the very action upon which his or her own existence depends.\n\nSpeaker: Dr. Molly Gardner, Assistant Professor of Philosophy, Bowling Green State University", "slug": "the-nonidentity-problem-part-2"}, {"path": "khan/partner-content/wi-phi/value-theory-1/original-position/", "id": "nO5me_5c8dM", "title": "Political: Original Position", "kind": "Video", "description": "Luvell introduces us to the original position -- an idea due to the most important political philosopher of the 20th Century, John Rawls. The original position is a way of thinking about what makes an institution or a society just.\n\nSpeaker: Dr. Luvell Anderson, Assistant Professor of Philosophy, The University of Memphis", "slug": "original-position"}, {"path": "khan/partner-content/wi-phi/value-theory-1/race-and-the-carceral-state/", "id": "dy12qq-ngLc", "title": "Political: Race and the Carceral State", "kind": "Video", "description": "Why do people see mass incarceration as a racial problem? What does race have to do with incarceration and what does either have to do with philosophy?\n\nSpeaker:\u00a0Olufemi Taiwo, UCLA", "slug": "race-and-the-carceral-state"}, {"path": "khan/partner-content/wi-phi/value-theory-1/race-racist-institutions/", "id": "BXdXw-7Q82o", "title": "Political: Race and Racist Institutions", "kind": "Video", "description": "In this video, Eduardo Mendieta (Penn State University) asks \"What are the consequences of race thinking and the institutional and legal forms of segregation if race is not real? Why do we categorize race as a real thing based on visual perception and how is such a category anti-democratic?\"\n\nSpeaker: Dr. Eduardo Mendieta, Professor of Philosophy, Pennsylvania State University", "slug": "race-racist-institutions"}, {"path": "khan/partner-content/wi-phi/value-theory-1/the-prisoners-dilemma/", "id": "YGyZX0VoRpI", "title": "Political: The Prisoner's Dilemma", "kind": "Video", "description": "In this video, Professor Geoffrey Sayre-McCord (UNC-Chapel Hill) explains the prisoner's dilemma. The prisoner's dilemma is a scenario where all parties making rational choices ensures a less desired result for each than if each actor had chosen individually less-preferred options.\n\nSpeaker: Dr. Geoffrey Sayre-McCord, Professor of Philosophy, University of North Carolina at Chapel Hill", "slug": "the-prisoners-dilemma"}, {"path": "khan/partner-content/wi-phi/value-theory-1/tragedy-of-commons/", "id": "lj_gLquca7Q", "title": "Political: Tragedy of the Commons", "kind": "Video", "description": "In this video, Professor Jonathan Anomaly discusses commons tragedies, which are defined as a situation in which the benefits of an action are borne by the individual while the costs are shared by all members of a group.\n\nSpeaker: Dr.\u00a0Jonathan Anomaly, Lecturer/Research Assistant Professor, Duke University and University of North Carolina at Chapel Hill", "slug": "tragedy-of-commons"}, {"path": "khan/partner-content/wi-phi/value-theory-1/collective-action-problems/", "id": "p3KlgxYhDbk", "title": "Political: Collective Action Problems", "kind": "Video", "description": "In this video, Professor Jonathan Anomaly (Duke and UNC \u2013 Chapel Hill) discusses collective action problems, which include any situation in which there is a conflict between individual rationality and social welfare, so that individuals working in isolation produce a worse outcome than they might if they could find a way to coordinate.\n\nSpeaker: Dr. Jonathan Anomaly, Lecturer/Research Assistant Professor, Duke University and University of North Carolina at Chapel Hill", "slug": "collective-action-problems"}, {"path": "khan/partner-content/wi-phi/value-theory-1/what-are-public-goods/", "id": "oTIu12zqf04", "title": "Political: What are Public Goods?", "kind": "Video", "description": "In this video, Professor Jonathan Anomaly (Duke and UNC \u2013 Chapel Hill) discusses public goods, which are goods that are jointly consumed, so that they are available to everyone if they are available to anyone. Public goods often lead to unexploited gains from trade, and are frequently invoked to justify why we have a state to perform basic functions like defense, property adjudication, and the regulation of pollution.\n\nSpeaker: Dr.\u00a0Jonathan Anomaly, Lecturer/Research Assistant Professor, Duke University and University of North Carolina at Chapel Hill", "slug": "what-are-public-goods"}, {"path": "khan/partner-content/wi-phi/value-theory-1/the-good-life-plato/", "id": "-oJs5u_GAYA", "title": "The Good Life: Plato", "kind": "Video", "description": "Chris Surprenant (University of New Orleans) discusses the account of human well-being and the good life presented by Socrates in Plato's dialogues. He explains why Socrates closely connects his account of the good life with justice, a concept understood not just as a political arrangement but also as a state of a well-ordered individual's soul.\n\nSpeaker: Dr. Chris Surprenant, Associate Professor of Philosophy, University of New Orleans", "slug": "the-good-life-plato"}, {"path": "khan/partner-content/wi-phi/value-theory-1/the-good-life-aristotle/", "id": "VFPBf1AZOQg", "title": "The Good Life: Aristotle", "kind": "Video", "description": "Chris Surprenant (University of New Orleans) discusses the account of human well-being and the good life presented by Aristotle in the Nicomachean Ethics and Politics. He explains why Aristotle believes that a human being lives well when he acts rightly and possesses all virtues, both intellectual and those relating to good character.\n\nSpeaker: Dr.\u00a0Chris Surprenant, Associate Professor of Philosophy, University of New Orleans", "slug": "the-good-life-aristotle"}, {"path": "khan/partner-content/wi-phi/value-theory-1/the-good-life-kant/", "id": "F6UQLiHB0k0", "title": "The Good Life: Kant", "kind": "Video", "description": "Chris Surprenant (University of New Orleans) discusses the account of human well-being and the good life presented by Immanuel Kant in the his moral, political, and religious writings. He explains why Kant believes that the highest good for a human being is the conjunction of happiness and complete virtue and how it is possible for an individual to attain these two things at the same time.\n\nSpeaker: Dr.\u00a0Chris Surprenant, Associate Professor of Philosophy, University of New Orleans", "slug": "the-good-life-kant"}], "in_knowledge_map": false, "description": "Value theory is an evaluative area of philosophy that includes ethics, aesthetics, social and political philosophy, feminist philosophy, and other areas.", "node_slug": "value-theory-1", "render_type": "Tutorial", "topic_page_url": "/partner-content/wi-phi/value-theory-1", "extended_slug": "partner-content/wi-phi/value-theory-1", "kind": "Topic", "slug": "value-theory-1"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/wi-phi/the-history-of-philosophy/", "id": "the-history-of-philosophy", "hide": false, "title": "History of Philosophy", "child_data": [{"kind": "Video", "id": "x8a0d99ca"}, {"kind": "Video", "id": "x72e98f8b"}, {"kind": "Video", "id": "x5d84815e"}, {"kind": "Video", "id": "x0b9f562e"}, {"kind": "Video", "id": "x2c7f8526"}, {"kind": "Video", "id": "x2b943262"}, {"kind": "Video", "id": "x7b0ec957"}, {"kind": "Video", "id": "x1523d8d6"}, {"kind": "Video", "id": "x3e7c54ec"}, {"kind": "Video", "id": "x6f9fd9b8"}, {"kind": "Video", "id": "x8b885aaa"}, {"kind": "Video", "id": "xed5719ae"}, {"kind": "Video", "id": "xa8d084b3"}, {"kind": "Video", "id": "x58307910"}, {"kind": "Video", "id": "x5d7997ca"}, {"kind": "Video", "id": "xf7deb347"}, {"kind": "Video", "id": "x2ab562b4"}, {"kind": "Video", "id": "x25cac618"}], "children": [{"path": "khan/partner-content/wi-phi/the-history-of-philosophy/aristotle-on-the-purpose-of-life/", "id": "sQk6t-9mQjE", "title": "Ancient: Aristotle on the Purpose of Life", "kind": "Video", "description": "In this video, Monte explores an approach to the question \u201cWhat is the purpose of life?\u201d developed by the Greek Philosopher Aristotle (384-322 BC). Aristotle reasoned that just as artificial things (such as tools and workers) have characteristic capabilities with respect to which they are judged to be good or do well, so each kind of natural thing (including plants and humans) has characteristic capabilities with respect to which can be judged, objectively, to be good or do well. For plants and animals these mostly have to do with nutrition and reproduction, and in the case of animals, pleasure and pain. For humans, these vegetative and animal capabilities are necessary but not sufficient for our flourishing. Since reason and the use of language are the unique and highest capabilities of humans, the cultivation and exercise of intellectual friendships and partnerships, moral and political virtue, scientific knowledge and (above all) theoretical philosophy, was argued by Aristotle to be the ultimate purpose of human life.\n\nSpeaker: Dr. Monte Ransome Johnson, \u00a0Associate Professor, University of California San Diego", "slug": "aristotle-on-the-purpose-of-life"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/epicurus-cure-for-unhappiness/", "id": "E5f5smh7Keo", "title": "Ancient: Epicurus\u2019 Cure for Unhappiness", "kind": "Video", "description": "In this video,\u00a0Monte\u00a0discusses the \u201ctetrapharmakos\u201d or \u201cfour-part remedy\u201d developed by the ancient Greek philosopher Epicurus (341-270 BC) and his followers to treat unhappiness and anxiety. The tetrapharmakos consists of four maxims which encapsulate the Epicurean outlook on god, life, death, pleasure, and pain. The maxims can be meditated upon in order to alleviate worries and concerns that continue to plague us as much as they did the ancients.\n\nSpeaker: Dr. Monte Ransome Johnson, Associate Professor, University of California, San Diego", "slug": "epicurus-cure-for-unhappiness"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/history-of-philosophy-mengzi-on-human-nature/", "id": "qvmxbDomk90", "title": "Ancient: Mengzi (Mencius) on Human Nature", "kind": "Video", "description": "What is human nature? Is human nature good or bad? Can human nature be good even if the world contains some notably bad people? Matthew Walker (Yale-NUS College) looks at the views of the early Confucian thinker Mengzi (Mencius).\n\nSpeaker: Dr. Matthew Walker, Assistant Professor, Yale-NUS College", "slug": "history-of-philosophy-mengzi-on-human-nature"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/xunzi-on-human-nature/", "id": "hEgLzTtQj7I", "title": "Ancient: Xunzi on Human Nature", "kind": "Video", "description": "In this video, David Wong discusses Xunzi's view of human nature.\n\nSpeaker: Dr. David Wong,\u00a0Susan Fox Beischer and George D. Beischer Professor of Philosophy, Duke University", "slug": "xunzi-on-human-nature"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/locke-personal-identity-part-1/", "id": "462Y898PVn8", "title": "Early Modern: Locke on Personal Identity, Part 1", "kind": "Video", "description": "Part 1 of 3. What makes you the same person as the little kid growing up a number of years ago? \u00a0Is the identity of a person tied to the persistence of a body or a soul or something else entirely? \u00a0Can we even give\u00a0any explanation at all of the persistence of a person? \u00a0Michael Della Rocca (Yale University) explores some of the puzzles and problems of personal identity that arise from the revolutionary work of the philosopher John Locke.\n\nSpeaker: Dr. Michael Della Rocca,\u00a0Andrew Downey Orrick Professor of Philosophy, Yale University", "slug": "locke-personal-identity-part-1"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/locke-personal-identity-part-2/", "id": "hLy2KhCUwN0", "title": "Early Modern: Locke on Personal Identity, Part 2", "kind": "Video", "description": "Part 2\u00a0of 3. What makes you the same person as the little kid growing up a number of years ago? \u00a0Is the identity of a person tied to the persistence of a body or a soul or something else entirely? \u00a0Can we even give\u00a0any explanation at all of the persistence of a person? \u00a0Michael Della Rocca (Yale University) explores some of the puzzles and problems of personal identity that arise from the revolutionary work of the philosopher John Locke.\n\nSpeaker: Dr. Michael Della Rocca,\u00a0Andrew Downey Orrick Professor of Philosophy, Yale University", "slug": "locke-personal-identity-part-2"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/locke-personal-identity-part-3/", "id": "3oG69aK0McM", "title": "Early Modern: Locke on Personal Identity, Part 3", "kind": "Video", "description": "Part 3\u00a0of 3. What makes you the same person as the little kid growing up a number of years ago? \u00a0Is the identity of a person tied to the persistence of a body or a soul or something else entirely? \u00a0Can we even give\u00a0any explanation at all of the persistence of a person? \u00a0Michael Della Rocca (Yale University) explores some of the puzzles and problems of personal identity that arise from the revolutionary work of the philosopher John Locke.\n\nSpeaker: Dr. Michael Della Rocca,\u00a0Andrew Downey Orrick Professor of Philosophy, Yale University", "slug": "locke-personal-identity-part-3"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/philosophy-descartes-cogito-argument/", "id": "7iGjiSbEp9c", "title": "Early Modern: Descartes' Cogito Argument", "kind": "Video", "description": "\"I think, therefore I am\" - almost everyone has heard of Ren\u00e9 Descartes' famous cogito argument. But what is this argument about? What does it show, and why are so many philosophers excited about it - even today, more than 350 years after Descartes first presented this argument?\n\nSpeaker: Dr. Stephan Schmid, Assistant Professor, Humboldt-University", "slug": "philosophy-descartes-cogito-argument"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/chatelet-part-1/", "id": "QefQbkN2CNE", "title": "Early Modern: \u00c9milie du Ch\u00e2telet, Part 1", "kind": "Video", "description": "In this first of two videos, Andrew Janiak introduces Emilie Du Chatelet, a French philosopher, and her contribution to the debate about the principle of sufficient reason. This video is a part of a series of videos coming from Project Vox (Duke), a project recovering the lost voices of women philosophers.\n\nSpeaker: Dr. Andrew Janiak,\u00a0Creed C. Black Associate Professor of Philosophy, Duke University", "slug": "chatelet-part-1"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/chatelet-part-2/", "id": "aXhHcqQTrIg", "title": "Early Modern: \u00c9milie du Ch\u00e2telet, Part 2", "kind": "Video", "description": "In part 2, Andrew Janiak (Duke) further introduces Emilie Du Chatelet, a French philosopher, and her contribution to the debate about the principle of sufficient reason. This video is a part of a series of videos coming from Project Vox (Duke), a project recovering the lost voices of women philosophers.\n\nSpeaker: Dr. Andrew Janiak,\u00a0Creed C. Black Associate Professor of Philosophy, Duke University", "slug": "chatelet-part-2"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/margaret-cavendish-part-1/", "id": "NXeZk1umylo", "title": "Early Modern: Margaret Cavendish, Part 1", "kind": "Video", "description": "In the first of two videos, Adela Deanova introduces Margaret Cavendish, an early modern English philosopher, and discusses the background to her critique of experimental philosophy. This video is a part of a series of videos coming from Project Vox (Duke), a project recovering the lost voices of women philosophers.\n\nSpeaker: Adela Deanova, Duke University", "slug": "margaret-cavendish-part-1"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/deanova-cavendish-part-2/", "id": "HDgRsZedjI4", "title": "Early Modern: Margaret Cavendish, Part 2", "kind": "Video", "description": "In the second of two videos, Adela Deanova introduces Margaret Cavendish, an early modern English philosopher, and discusses the background to her critique of experimental philosophy. This video is a part of a series of videos coming from Project Vox (Duke), a project recovering the lost voices of women philosophers.\n\nSpeaker: Adela Deanova, Duke University", "slug": "deanova-cavendish-part-2"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/humes-skepticism-part-1/", "id": "-QpUrSn3cWU", "title": "Hume: Skepticism and Induction, Part 1", "kind": "Video", "description": "According to the philosopher David Hume (1711-1776), absolutely everything we know falls into one of two categories: either it is a relation of ideas (e.g., 2 + 2 =4) or it is a matter of fact (e.g., the sky is blue). Daniel Greco walks us through this famous Humean distinction in preparation for examining Hume's even more famous skeptical argument against induction.\n\nSpeaker: Dr. Daniel Greco, Assistant Professor, Yale University", "slug": "humes-skepticism-part-1"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/humes-skepticism-and-induction-part-2/", "id": "dPlNsyXl-0c", "title": "Hume: Skepticism and Induction, Part 2", "kind": "Video", "description": "How do we know stuff about matters of fact that we have yet to observe? For example, how do I know that the sun will rise tomorrow? A natural answer is that we have this knowledge through induction: I know the sun will rise tomorrow, because it has risen every day in the past. Now, the philosopher David Hume recognized that this inductive reasoning assumes that the future will resemble the past. Why though think that this assumption is true? How do we know that the future will resemble the past? This question is the starting point for Hume's skeptical argument against induction (and his skeptical solution), which Daniel Greco lays out in detail in this video.\n\nSpeaker: Dr. Daniel Greco, Assistant Professor, Yale University", "slug": "humes-skepticism-and-induction-part-2"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/kant-on-metaphysical-knowledge/", "id": "vZtQXteAE-w", "title": "Kant: On Metaphysical Knowledge", "kind": "Video", "description": "Kant famously claims that we have\u00a0synthetic apriori\u00a0knowledge. Indeed, this claim is absolutely central to all of his philosophy. But what is synthetic aprioriknowledge? Scott Edgar helpfully breaks-down this category of knowledge by first walking through Kant's distinction between\u00a0empirical\u00a0and\u00a0apriori\u00a0knowledge and then his distinction between\u00a0analytic\u00a0and\u00a0synthetic\u00a0judgments. The interaction between these distinctions is then illustrated with numerous examples, making it clear why Kant, unlike Hume, thought that there is knowledge that is both apriori and synthetic and that this is the type of knowledge philosophers seek.\n\nSpeaker: Dr. Scott Edgar, Associate Professor, Saint Mary's University", "slug": "kant-on-metaphysical-knowledge"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/kant-on-space-part-1/", "id": "vQnG0fyEr_w", "title": "Kant: On Space, Part 1", "kind": "Video", "description": "What is space? Kant's answer is a head-scratcher:\u00a0space is merely a form of intuition. Scott Edgar explains this rather perplexing answer in accessible, every-day language. He also lays out \u00a0Kant's most famous argument for this view of space (the \"Argument from Geometry\"). Never before has it been so easy to get a handle on Kant's views on space!\n\nSpeaker: Dr. Scott Edgar, Assistant Professor, Saint Mary's University", "slug": "kant-on-space-part-1"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/kant-on-space-part-2/", "id": "89xjsBW9AAI", "title": "Kant: On Space, Part 2", "kind": "Video", "description": "Scott Edgar (Saint Mary's) returns to Kant's argument from Geometry, this time examining two famous objections to it: the famous \"neglected alternative\" objection and a powerful objection from 20th century physics. After considering possible responses on Kant's behalf, Scott ends with a bang, introducing Kant's famous claim that we know things only as they appear to us, not as they are in themselves.\n\nSpeaker: Dr. Scott Edgar, Assistant Professor, Saint Mary's University", "slug": "kant-on-space-part-2"}, {"path": "khan/partner-content/wi-phi/the-history-of-philosophy/experimental-philosophy/", "id": "EVoZCOVzdaU", "title": "Contemporary: Experimental Philosophy", "kind": "Video", "description": "In this video, Joshua Knobe describes a new philosophical tool called experimental philosophy. To explain the project, he introduces some new research from Felipe De Brigard, and he shows how it applies to a traditional problem in philosophy.\u00a0\n\nSpeaker: Dr. Joshua Knobe,\u00a0Professor of Philosophy and Cognitive Science, Yale University", "slug": "experimental-philosophy"}], "in_knowledge_map": false, "description": "Are you interested in learning more about what philosophers have said in the past? Check out this section to learn more about the history of philosophical thought.", "node_slug": "the-history-of-philosophy", "render_type": "Tutorial", "topic_page_url": "/partner-content/wi-phi/the-history-of-philosophy", "extended_slug": "partner-content/wi-phi/the-history-of-philosophy", "kind": "Topic", "slug": "the-history-of-philosophy"}], "in_knowledge_map": false, "description": "Wi-Phi's mission is to introduce people to the practice of philosophy by offering lectures on philosophical issues and critical thinking concepts that are freely available in a form that is entertaining, interesting and accessible to people with no background in the subject.\n\nWe see this as a part of a larger mission: building our collective capacity to engage in rational thought and discourse. \u00a0By providing the toolkit for building better minds, we hope that Wi-Phi plays some small role in realizing that goal.", "node_slug": "wi-phi", "render_type": "Subject", "topic_page_url": "/partner-content/wi-phi", "extended_slug": "partner-content/wi-phi", "kind": "Topic", "slug": "wi-phi"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/lebron-asks-subject/", "id": "lebron-asks-subject", "hide": false, "title": "LeBron asks", "child_data": [{"kind": "Topic", "id": "xe9b9297e"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/lebron-asks-subject/lebron-asks/", "id": "lebron-asks", "hide": false, "title": "LeBron asks", "child_data": [{"kind": "Video", "id": "1022166697"}, {"kind": "Video", "id": "1022249161"}, {"kind": "Video", "id": "1022060030"}, {"kind": "Video", "id": "1022193589"}, {"kind": "Video", "id": "1021984988"}, {"kind": "Video", "id": "753767269"}, {"kind": "Video", "id": "1022209423"}, {"kind": "Video", "id": "1094139389"}], "children": [{"path": "khan/partner-content/lebron-asks-subject/lebron-asks/lebron-asks-what-muscles-do-we-use-when-shooting-a-basket/", "id": "9qEaVwIXqR4", "title": "LeBron Asks: What muscles do we use when shooting a basket?", "kind": "Video", "description": "LeBron James asks Sal Khan about which muscles we use when we shoot a basket.", "slug": "lebron-asks-what-muscles-do-we-use-when-shooting-a-basket"}, {"path": "khan/partner-content/lebron-asks-subject/lebron-asks/lebron-asks-about-newton-s-3rd-law/", "id": "R8qygu1RUOI", "title": "LeBron Asks: How does shooting a basketball illustrate Newton's 3rd Law?", "kind": "Video", "description": "How does a basketball apply a force to the shooter's hand?", "slug": "lebron-asks-about-newton-s-3rd-law"}, {"path": "khan/partner-content/lebron-asks-subject/lebron-asks/lebron-asks-about-comparing-earth-s-history-to-a-basketball-game/", "id": "13E90TAtZ30", "title": "LeBron Asks: If Earth's history were a basketball game, when did humans appear?", "kind": "Video", "description": "LeBron James asks Sal about how long humanity has been around as compared to the history of the Earth", "slug": "lebron-asks-about-comparing-earth-s-history-to-a-basketball-game"}, {"path": "khan/partner-content/lebron-asks-subject/lebron-asks/lebron-asks-why-does-sweating-cool-you-down/", "id": "jgnNhL2jSXY", "title": "LeBron Asks: Why does sweating cool you down?", "kind": "Video", "description": "LeBron asks Sal why sweating helps cool the body down.", "slug": "lebron-asks-why-does-sweating-cool-you-down"}, {"path": "khan/partner-content/lebron-asks-subject/lebron-asks/lebron-asks-why-does-humidity-make-it-feel-hotter/", "id": "Jgliqx42_BA", "title": "LeBron Asks: Why does humidity make it feel hotter?", "kind": "Video", "description": "LeBron asks Sal why humidity makes it feel so much hotter.", "slug": "lebron-asks-why-does-humidity-make-it-feel-hotter"}, {"path": "khan/partner-content/lebron-asks-subject/lebron-asks/lebron-asks-about-the-chances-of-making-10-free-throws/", "id": "iMqCSgqzmiQ", "title": "Free throwing probability", "kind": "Video", "description": "Our friend and Cleveland Cavalier, LeBron James, asks Sal how to determine the probability of making 10 free throws in a row. Hint: the answer is surprising!", "slug": "lebron-asks-about-the-chances-of-making-10-free-throws"}, {"path": "khan/partner-content/lebron-asks-subject/lebron-asks/lebron-asks-about-free-throws-versus-three-pointers/", "id": "PddbEVNMgTY", "title": "Three pointer vs free throwing probability", "kind": "Video", "description": "Our friend and Cleveland Cavalier, LeBron James, asks Sal if there's a high probability of making three free throws in a row or one three-pointer. Before solving the problem, jot down what you think the answer will be!", "slug": "lebron-asks-about-free-throws-versus-three-pointers"}, {"path": "khan/partner-content/lebron-asks-subject/lebron-asks/monte-carlo-simulation-to-answer-lebron-s-question/", "id": "-fCVxTTAtFQ", "title": "Monte Carlo simulation to answer LeBron's question", "kind": "Video", "description": "When down 3 with 30 seconds left, is it better to take a hard 3 or an easy 2 and try to get another possession? Simulation at: http://www.khanacademy.org/cs/basketball-decisions/1024155511", "slug": "monte-carlo-simulation-to-answer-lebron-s-question"}], "in_knowledge_map": false, "description": "LeBron James asks questions about math and science, and we answer!", "node_slug": "lebron-asks", "render_type": "UncuratedTutorial", "topic_page_url": "/partner-content/lebron-asks-subject/lebron-asks", "extended_slug": "partner-content/lebron-asks-subject/lebron-asks", "kind": "Topic", "slug": "lebron-asks"}], "in_knowledge_map": false, "description": "LeBron James asks questions about math and science, and we answer!", "node_slug": "lebron-asks-subject", "render_type": "Subject", "topic_page_url": "/partner-content/lebron-asks-subject", "extended_slug": "partner-content/lebron-asks-subject", "kind": "Topic", "slug": "lebron-asks-subject"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/brookings-institution/", "id": "brookings-institution", "hide": false, "title": "The Brookings Institution", "child_data": [{"kind": "Topic", "id": "x30cf2035"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/brookings-institution/introduction-to-healthcare/", "id": "introduction to healthcare", "hide": false, "title": "Introduction to health care in the U.S.", "child_data": [{"kind": "Video", "id": "x455bde28"}, {"kind": "Video", "id": "x77c6ff26"}, {"kind": "Video", "id": "xb8ba5791"}, {"kind": "Video", "id": "x6de5dd5d"}, {"kind": "Video", "id": "x716f4f06"}, {"kind": "Video", "id": "xaa642759"}, {"kind": "Video", "id": "x2289604d"}, {"kind": "Video", "id": "xdb975e59"}, {"kind": "Video", "id": "xf1160404"}, {"kind": "Video", "id": "x4844f7b0"}, {"kind": "Exercise", "id": "x73bba960"}], "children": [{"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/introduction-to-health-care/", "id": "mG_BZ8GgqJU", "title": "Introduction to the U.S. health care system", "kind": "Video", "description": "Confused about the U.S. health care system? This introduction uses one patient as an example to illustrate how money flows within the system. This will serve as the basis for deeper dives into each program as well as health care delivery and payment reform.", "slug": "introduction-to-health-care"}, {"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/medicare/", "id": "q8olT3TyHm8", "title": "Medicare", "kind": "Video", "description": "Medicare is the federal health insurance program for the elderly and disabled, but many people might be confused about how it works and how it is funded. This video explains the history, structure, and financing of this program.", "slug": "medicare"}, {"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/medicaid/", "id": "AXv9B0bcZ1A", "title": "Medicaid", "kind": "Video", "description": "Medicaid is a federal/state partnership that provides health insurance and other services for low-income families and other eligible people. Learn what services are covered and how states are involved to fund and administer the program.", "slug": "medicaid"}, {"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/the-uninsured/", "id": "glMvD6x4vqw", "title": "The U.S. uninsured population", "kind": "Video", "description": "More than 45 million Americans lack health insurance. This video explains who they are, what issues they face, how their care is paid for, and the possible future of health care coverage for them.", "slug": "the-uninsured"}, {"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/paying-for-medicines-copays-and-deductibles/", "id": "6unzbhlxXxM", "title": "Paying for medicines: copays and deductibles", "kind": "Video", "description": "How do copays and deductibles work? Why is paying for medicine so complicated? In the first of two videos on paying for medicines, an overview of over the counter and prescription drugs is provided.", "slug": "paying-for-medicines-copays-and-deductibles"}, {"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/paying-for-medicines-tiering-formularies/", "id": "5ahti9i1eFM", "title": "Paying for medicines: tiering and formularies", "kind": "Video", "description": "In the second of two videos on paying for medications, the concepts of tiered drug pricing, preferred drug lists, and Medicare Part D are explained to shed some light on the issue.", "slug": "paying-for-medicines-tiering-formularies"}, {"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/what-goes-into-a-medical-bill/", "id": "ZXUpfcTvSaI", "title": "Understanding your medical bill", "kind": "Video", "description": "Have you ever been confused by a medical bill? What happens after you visit the doctor? This video explains how medical costs are calculated and paid for by public and private insurance. \u00a0Learn more about the path of that bill, how it\u2019s processed, and who pays for what.", "slug": "what-goes-into-a-medical-bill"}, {"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/health-care-cost/", "id": "GyBS8GMynKQ", "title": "Health care costs", "kind": "Video", "description": "We all know the US spends a lot on health care, but why are costs so high and what can we do about it? This video explains the reasons why costs have risen so rapidly and various policies proposed to contain costs and improve health care value.", "slug": "health-care-cost"}, {"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/private-health-insurance/", "id": "W6gKc7Yjig8", "title": "Private health insurance", "kind": "Video", "description": "Approximately half of Americans rely on their employers to help obtain and pay for health coverage. This video explains the history of private insurance, how risk-sharing works, and the incentives for employers and employees to share the responsibility of health care coverage.", "slug": "private-health-insurance"}, {"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/health-care-for-the-chronically-ill/", "id": "ZbAh3QoKd3U", "title": "Health care for the chronically ill", "kind": "Video", "description": "Caring for chronically ill patients raises significant challenges and is consuming a greater percentage of health care services and spending. These patients often require special care outside of the hospital setting, including rehabilitation, post-acute care, and long-term care. This video explains how and where chronically ill patients receive care, who pays for these services, and how the needs of this population affect the overall health care system.", "slug": "health-care-for-the-chronically-ill"}, {"path": "khan/partner-content/brookings-institution/introduction-to-healthcare/healthcare-exercise/", "id": "healthcare-exercise", "title": "Health care exercise", "slug": "healthcare-exercise", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This tutorial introduces the structure of the U.S. health care system, how money flows within it, and an overview of different types of public and private insurance. These videos and questions provide a clear explanation of what is and is not working within the health care system to help frame the health care reform discussion and inform clinicians and the public how to improve quality while decreasing health care spending. Narrated by Dr. Darshak Sanghavi, a pediatric cardiologist and fellow at Brookings Institution.", "node_slug": "introduction to healthcare", "render_type": "Tutorial", "topic_page_url": "/partner-content/brookings-institution/introduction to healthcare", "extended_slug": "partner-content/brookings-institution/introduction to healthcare", "kind": "Topic", "slug": "introduction-to-healthcare"}], "in_knowledge_map": false, "description": "Designed for clinicians as well as the general public, these engaging tutorials provide an overview of the U.S. health care system and payment and delivery reform efforts at the federal, state, and local levels. Created by the Merkin Initiative at The Brookings Institution and presented by Khan Academy, the content covers an introduction to health care costs, Medicare, Medicaid, prescription drug coverage, and more.", "node_slug": "brookings-institution", "render_type": "Subject", "topic_page_url": "/partner-content/brookings-institution", "extended_slug": "partner-content/brookings-institution", "kind": "Topic", "slug": "brookings-institution"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/pixar/", "id": "pixar", "hide": false, "title": "Pixar in a Box", "child_data": [{"kind": "Topic", "id": "x10961fed"}, {"kind": "Topic", "id": "xe9a2f1ad"}, {"kind": "Topic", "id": "xeb5f0454"}, {"kind": "Topic", "id": "xf15ede51"}, {"kind": "Topic", "id": "x7c62524e"}, {"kind": "Topic", "id": "x6bb19dea"}, {"kind": "Topic", "id": "xa4278817"}, {"kind": "Topic", "id": "x8c2e11fe"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/pixar/start/", "id": "start", "hide": false, "title": "Start here!", "child_data": [{"kind": "Topic", "id": "x8acdcafb"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/pixar/start/introduction/", "id": "introduction", "hide": false, "title": "Introduction", "child_data": [{"kind": "Video", "id": "xf3022a0f"}, {"kind": "Article", "id": "xbfe2595c"}, {"kind": "Article", "id": "xb5faf6fd"}], "children": [{"path": "khan/partner-content/pixar/start/introduction/pipeline-video/", "id": "3Iu1Z0h1i1Y", "title": "Start here!", "kind": "Video", "description": "Overview of Pixar in a Box.\nCLICK HERE to get started.", "slug": "pipeline-video"}], "in_knowledge_map": false, "description": "", "node_slug": "introduction", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/start/introduction", "extended_slug": "partner-content/pixar/start/introduction", "kind": "Topic", "slug": "introduction"}], "in_knowledge_map": false, "description": "Overview of Pixar in a Box for students & teachers.", "node_slug": "start", "render_type": "Topic", "topic_page_url": "/partner-content/pixar/start", "extended_slug": "partner-content/pixar/start", "kind": "Topic", "slug": "start"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/pixar/environment-modeling-2/", "id": "environment-modeling-2", "hide": false, "title": "Environment modeling", "child_data": [{"kind": "Topic", "id": "x1f25dea1"}, {"kind": "Topic", "id": "x80ea3bb0"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/", "id": "animating-parabolas-ver2", "hide": false, "title": "Modeling grass with parabolas", "child_data": [{"kind": "Article", "id": "x1d6065f8"}, {"kind": "Video", "id": "xaa1965f3"}, {"kind": "Video", "id": "x1e11f601"}, {"kind": "Scratchpad", "id": "5637644097814528"}, {"kind": "Video", "id": "x12349e70"}, {"kind": "Exercise", "id": "13090861"}, {"kind": "Video", "id": "x063a415d"}, {"kind": "Exercise", "id": "x25ab91db"}, {"kind": "Video", "id": "x38e6b708"}, {"kind": "Scratchpad", "id": "6543641679101952"}, {"kind": "Video", "id": "x6cdbb58f"}, {"kind": "Scratchpad", "id": "6560221863477248"}, {"kind": "Video", "id": "x7250e9fa"}, {"kind": "Article", "id": "x6884cac4"}], "children": [{"path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/overview-parabolic-arcs/", "id": "fuwUltMAdYQ", "title": "Introduction to parabolic arcs", "kind": "Video", "description": "What do parabolic arcs have to do with blades of grass?", "slug": "overview-parabolic-arcs"}, {"path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/parabolic-arcs-1/", "id": "7sfGMAOeN9E", "title": "1. String art", "kind": "Video", "description": "Find out how we can make curved lines using straight ones using the string art construction.\nClick here to see Vi Hart's video on this technique.", "slug": "parabolic-arcs-1"}, {"path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/environment-modeling2/", "id": "47_f2c-URn4", "title": "2. Midpoint formula", "kind": "Video", "description": "Explore how midpoints are used to describe the \"string art construction.\"", "slug": "environment-modeling2"}, {"path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/midpoint_formula/", "id": "midpoint_formula", "title": "Midpoint formula", "description": "Find the midpoint of a segment on the coordinate plane, or find the endpoint of a segment given one point and the midpoint.", "slug": "midpoint_formula", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/environment-modeling3/", "id": "AH5h7F59Pcw", "title": "3. Parabolic arcs", "kind": "Video", "description": "Are we really creating parabolic curves using this construction? Let's gain some insight first.", "slug": "environment-modeling3"}, {"path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/parabolic-curve-maching/", "id": "parabolic-curve-maching", "title": "Parabolic curve matching", "description": "Match parabolic curves using a 3-point polygon", "slug": "parabolic-curve-maching", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/environment-4/", "id": "q4nreCdMfRk", "title": "4. Modeling grass", "kind": "Video", "description": "Next let's build a blade of grass using a parabolic arc as a spine.\nClick here\u00a0to review perpendicular lines.", "slug": "environment-4"}, {"path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/environment-modeling5/", "id": "0AkUTNMTDis", "title": "5. Animating grass", "kind": "Video", "description": "Finally, let's bring our parabolic arc to life!", "slug": "environment-modeling5"}, {"path": "khan/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2/tony-derose/", "id": "ozKd1cBfTTg", "title": "Getting to know Tony DeRose", "kind": "Video", "slug": "tony-derose"}], "in_knowledge_map": false, "description": "Discover how we create parabolic arcs by weaving together straight lines. This lesson touches on midpoints (grade 5) and takes 45-60min. Plus there's a hands-on activity at the end!", "node_slug": "animating-parabolas-ver2", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/environment-modeling-2/animating-parabolas-ver2", "extended_slug": "partner-content/pixar/environment-modeling-2/animating-parabolas-ver2", "kind": "Topic", "slug": "animating-parabolas-ver2"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/", "id": "mathematics-of-parabolas2-ver2", "hide": false, "title": "Calculating parabolas", "child_data": [{"kind": "Article", "id": "x3347a03f"}, {"kind": "Video", "id": "x0ff0352e"}, {"kind": "Exercise", "id": "xf5f36d43"}, {"kind": "Video", "id": "x8b2e3c19"}, {"kind": "Exercise", "id": "x9c38d5eb"}, {"kind": "Video", "id": "x75de4a44"}, {"kind": "Exercise", "id": "x6dc43d0e"}, {"kind": "Video", "id": "x4c6d7460"}, {"kind": "Exercise", "id": "xd8d2b26a"}, {"kind": "Video", "id": "x571ef441"}, {"kind": "Exercise", "id": "x2402f8f2"}], "children": [{"path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/weighted-average-two-points/", "id": "SkdYqyCIh5g", "title": "1. Weighted average of two points", "kind": "Video", "description": "How can we calculate a weighted average between two points? (pssst. This video is super important)", "slug": "weighted-average-two-points"}, {"path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/weighted-averages-on-a-line/", "id": "weighted-averages-on-a-line", "title": "Weighted averages", "description": "Calculate what weighting used in a weighted average of two points.", "slug": "weighted-averages-on-a-line", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/environmentmodeling-7/", "id": "xOlHaQSBwOk", "title": "2. Where is the touching point?", "kind": "Video", "description": "Where does the string touch the parabola? See if you can come up with your hypothesis!", "slug": "environmentmodeling-7"}, {"path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/bezier1/", "id": "bezier1", "title": "Exploring the parabola construction", "description": "Where does the string touch the parabola?", "slug": "bezier1", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/environment-modeling8/", "id": "7VJ_8jNaL-Y", "title": "3. Compute the touching point", "kind": "Video", "description": "Let's apply what we just learned to calculate the touching point.", "slug": "environment-modeling8"}, {"path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/decasteljau/", "id": "decasteljau", "title": "Calculate touching point", "description": "Find points on a parabola using DeCasteljau's algorithm", "slug": "decasteljau", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/environmentmodeling8a/", "id": "deRTQCXHdwE", "title": "4. How can we prove this?", "kind": "Video", "description": "Okay we know how to calculate the touching point, great! Next let's think about how we can prove this is true.", "slug": "environmentmodeling8a"}, {"path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/touching-point/", "id": "touching-point", "title": "Touching point", "description": "Confirm your understanding of the construction", "slug": "touching-point", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2/environment-modeling10/", "id": "a6JFpAMgy94", "title": "Bonus: Completing the proof", "kind": "Video", "description": "One way we can prove that we are calculating the actual touching point.", "slug": "environment-modeling10"}], "in_knowledge_map": false, "description": "Discover how computers draw millions of parabolas really efficiently using DeCastlejau's algorithm. This lesson introduces weighted averages of two points leading to parametric curves. It touches on concepts in grade 7 through high school and takes 35-50min.", "node_slug": "mathematics-of-parabolas2-ver2", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2", "extended_slug": "partner-content/pixar/environment-modeling-2/mathematics-of-parabolas2-ver2", "kind": "Topic", "slug": "mathematics-of-parabolas2-ver2"}], "in_knowledge_map": false, "description": "Explore how blades of grass in Brave were created using parabolic arcs.", "node_slug": "environment-modeling-2", "render_type": "Topic", "topic_page_url": "/partner-content/pixar/environment-modeling-2", "extended_slug": "partner-content/pixar/environment-modeling-2", "kind": "Topic", "slug": "environment-modeling-2"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/pixar/modeling-character/", "id": "modeling-character", "hide": false, "title": "Character modeling", "child_data": [{"kind": "Topic", "id": "x6b8849b1"}, {"kind": "Topic", "id": "x66202dcd"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/", "id": "modeling-subdivision", "hide": false, "title": "Modeling with subdivision surfaces", "child_data": [{"kind": "Article", "id": "xfc6ebb1c"}, {"kind": "Video", "id": "xc390fc4b"}, {"kind": "Video", "id": "x5be5a077"}, {"kind": "Scratchpad", "id": "6048902355746816"}, {"kind": "Video", "id": "x34149e82"}, {"kind": "Exercise", "id": "x0a576b08"}, {"kind": "Video", "id": "x91201e91"}, {"kind": "Scratchpad", "id": "5920598529277952"}, {"kind": "Video", "id": "x3c5e1f30"}, {"kind": "Scratchpad", "id": "4645347866181632"}, {"kind": "Exercise", "id": "x5ab7c62c"}, {"kind": "Video", "id": "x9710da3e"}], "children": [{"path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/cm-start/", "id": "YC3Z5nqCs_8", "title": "Introduction to subdivision surfaces", "kind": "Video", "description": "Overview of this topic", "slug": "cm-start"}, {"path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/charactermodeling-1/", "id": "og-yMw3DLgE", "title": "1. Split vs. average", "kind": "Video", "description": "First we need to make sure we understand exactly what happens in the split & average steps.\nClick here\u00a0to go to the Environment Modeling lesson", "slug": "charactermodeling-1"}, {"path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/charactermodeling2/", "id": "qaYi3_wFlFM", "title": "2. Subdivide operation", "kind": "Video", "description": "Now we can combine split and average into a single operation called subdivide.\nClick here to review midpoints.\nClick here\u00a0to go to the Environment Modeling lesson.", "slug": "charactermodeling2"}, {"path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/subdivision-1/", "id": "subdivision-1", "title": "Subdivision", "description": "Understanding how the subdivision algorithm works", "slug": "subdivision-1", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/charactermodeling3/", "id": "MLj-PpvqlPs", "title": "3. Subdividing your own designs", "kind": "Video", "description": "Now you are ready to start subdividing your own shapes with more than 4 points!", "slug": "charactermodeling3"}, {"path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/charactermodeling4/", "id": "2UjfxAuXuSU", "title": "4. Subdivision in 3D", "kind": "Video", "description": "Now let's think about how subdivision would work in 3D.", "slug": "charactermodeling4"}, {"path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/subdivision-in-3d/", "id": "subdivision-in-3d", "title": "Subdivision in 3D", "description": "Understand how subdivision works with an object in three dimensions.", "slug": "subdivision-in-3d", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/modeling-character/modeling-subdivision/cm-gettingtoknow/", "id": "6px4rzfC6jY", "title": "Getting to know Alonso Martinez", "kind": "Video", "description": "What makes Alonzo tick?", "slug": "cm-gettingtoknow"}], "in_knowledge_map": false, "description": "Discover one of Pixar's key modeling technologies: subdivision surfaces. This lesson introduces the split and average operations used to make smooth surfaces. It's appropriate for all ages and takes 40-50 minutes.", "node_slug": "modeling-subdivision", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/modeling-character/modeling-subdivision", "extended_slug": "partner-content/pixar/modeling-character/modeling-subdivision", "kind": "Topic", "slug": "modeling-subdivision"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/modeling-character/subdivision-averages/", "id": "subdivision-averages", "hide": false, "title": "Mathematics of subdivision", "child_data": [{"kind": "Article", "id": "x9c54b624"}, {"kind": "Video", "id": "x9f3605b8"}, {"kind": "Exercise", "id": "x5dd564ef"}, {"kind": "Exercise", "id": "x558de5ea"}, {"kind": "Video", "id": "x140ab9b2"}, {"kind": "Exercise", "id": "xde8e00d3"}, {"kind": "Video", "id": "xadecf331"}, {"kind": "Scratchpad", "id": "4646662727008256"}, {"kind": "Exercise", "id": "x46dee7fd"}, {"kind": "Article", "id": "x88fa2ebe"}], "children": [{"path": "khan/partner-content/pixar/modeling-character/subdivision-averages/charactermodeling5/", "id": "LzkL0Iik2B8", "title": "1. Weighted average of three points", "kind": "Video", "description": "First we'll review weighted averages of two points and extend the idea to three points.\nClick here to practice weighted averages of two points if you haven't seen it before.", "slug": "charactermodeling5"}, {"path": "khan/partner-content/pixar/modeling-character/subdivision-averages/weighted-average-intuition/", "id": "weighted-average-intuition", "title": "Weighted average intuition", "description": "First let's make sure you are comfortable with this construction.", "slug": "weighted-average-intuition", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/modeling-character/subdivision-averages/weighted_average_of_three_points/", "id": "weighted_average_of_three_points", "title": "Weighted average of three points", "description": "Now it's your turn to prove you can calculate the weighted average. Later on we can let the computer do these calculations for us (phew!)", "slug": "weighted_average_of_three_points", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/modeling-character/subdivision-averages/charactermodeling6/", "id": "jPArsPD0EUQ", "title": "2. Weighted subdivision", "kind": "Video", "description": "Next let's see extend the averaging step from the previous lesson to include multiple points. Now we'll need to calculate positions using a weighted average (we we just covered).", "slug": "charactermodeling6"}, {"path": "khan/partner-content/pixar/modeling-character/subdivision-averages/weighted-subdivision/", "id": "weighted-subdivision", "title": "Weighted subdivision", "description": "Understanding what happens in subdivision with different weights", "slug": "weighted-subdivision", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/modeling-character/subdivision-averages/charactermodeling7/", "id": "vhNxNZLjuOg", "title": "3. Fun with weights", "kind": "Video", "description": "Let's take a closer look at the weights used during subdivision. Do we have to be careful when selecting weights?\nClick here to learn more about Pascal's Triangle & the Binomial theorem\nClick here to learn about eigenvalues & eignenvectors", "slug": "charactermodeling7"}, {"path": "khan/partner-content/pixar/modeling-character/subdivision-averages/subdivision-weights/", "id": "subdivision-weights", "title": "Subdivision weights", "description": "Understanding how different weights effect the subdivision algorithm", "slug": "subdivision-weights", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Explore how to calculate a weighted average of 3 points and connect this to the subdivision operation from lesson 1. This lesson touches on concepts in grades 7 through high school and takes 35-50 minutes.", "node_slug": "subdivision-averages", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/modeling-character/subdivision-averages", "extended_slug": "partner-content/pixar/modeling-character/subdivision-averages", "kind": "Topic", "slug": "subdivision-averages"}], "in_knowledge_map": false, "description": "Explore how clay models are transformed into digital characters using weighted averages.", "node_slug": "modeling-character", "render_type": "Topic", "topic_page_url": "/partner-content/pixar/modeling-character", "extended_slug": "partner-content/pixar/modeling-character", "kind": "Topic", "slug": "modeling-character"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/pixar/animate/", "id": "animate", "hide": false, "title": "Animation", "child_data": [{"kind": "Topic", "id": "x197442f4"}, {"kind": "Topic", "id": "xd21c4571"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/animate/ball/", "id": "ball", "hide": false, "title": "Introduction to animation", "child_data": [{"kind": "Article", "id": "x6978565e"}, {"kind": "Video", "id": "x3c16ee12"}, {"kind": "Video", "id": "x6f614996"}, {"kind": "Scratchpad", "id": "6624408588386304"}, {"kind": "Video", "id": "xfffc7cdb"}, {"kind": "Scratchpad", "id": "5088555429920768"}, {"kind": "Video", "id": "xd20f9e82"}, {"kind": "Scratchpad", "id": "5414532843438080"}, {"kind": "Video", "id": "x45b226d4"}, {"kind": "Scratchpad", "id": "5333348146872320"}, {"kind": "Exercise", "id": "x9a736df1"}, {"kind": "Video", "id": "xf0ae1b96"}, {"kind": "Article", "id": "x179a07be"}, {"kind": "Article", "id": "xd9e289d0"}], "children": [{"path": "khan/partner-content/pixar/animate/ball/intro-animation/", "id": "zaNUFmhD5PM", "title": "Introduction to animation", "kind": "Video", "description": "Overview of this topic", "slug": "intro-animation"}, {"path": "khan/partner-content/pixar/animate/ball/animation-1a/", "id": "zMQhuo3QYIg", "title": "1. Straight ahead animation", "kind": "Video", "description": "Let's start by drawing every frame, one by one...", "slug": "animation-1a"}, {"path": "khan/partner-content/pixar/animate/ball/a2-quick/", "id": "KxM05gLQ654", "title": "2. Linear interpolation", "kind": "Video", "description": "Connecting key poses with straight lines is called linear interpolation.", "slug": "a2-quick"}, {"path": "khan/partner-content/pixar/animate/ball/animation3/", "id": "G7sxV2G-OEo", "title": "3. Bezier curves", "kind": "Video", "description": "Using Bezier curves we can get smooth motion between keyframes.", "slug": "animation3"}, {"path": "khan/partner-content/pixar/animate/ball/animate-4/", "id": "L_lCAaTKIRE", "title": "4. Squash and stretch", "kind": "Video", "description": "Let's breath some life into our ball using a key animation principle: squash and stretch.", "slug": "animate-4"}, {"path": "khan/partner-content/pixar/animate/ball/animation-101/", "id": "animation-101", "title": "Animation 101", "description": "Prove that you've successfully animated a bouncing ball.", "slug": "animation-101", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/animate/ball/getting-to-know-rob-jensen/", "id": "Wtxec3V4WKQ", "title": "Getting to know Rob Jensen", "kind": "Video", "description": "How did Rob start out?", "slug": "getting-to-know-rob-jensen"}], "in_knowledge_map": false, "description": "In this lesson you will use animation tools to bring a ball to life. Along the way you'll learn some basic principles of animation. It's appropriate for all ages and takes 45-60 minutes (beware: animation can be addicting).", "node_slug": "ball", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/animate/ball", "extended_slug": "partner-content/pixar/animate/ball", "kind": "Topic", "slug": "ball"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/animate/parametric-curves/", "id": "parametric-curves", "hide": false, "title": "Mathematics of animation curves", "child_data": [{"kind": "Article", "id": "x97803dae"}, {"kind": "Video", "id": "xc89ce440"}, {"kind": "Exercise", "id": "x605b7b02"}, {"kind": "Video", "id": "x9c4cae16"}, {"kind": "Video", "id": "x41764406"}, {"kind": "Scratchpad", "id": "6239267847929856"}, {"kind": "Video", "id": "x5d7bda61"}, {"kind": "Article", "id": "xd402e722"}], "children": [{"path": "khan/partner-content/pixar/animate/parametric-curves/animation-5/", "id": "0XAE9Q9jfBY", "title": "1. Mathematics of linear interpolation", "kind": "Video", "description": "First we'll use the slope intercept form of a line to define each frame along a straight line.\nClick here to review slope-intercept form of a line.\nClick here to do the Environment Modeling topic if you haven't already.", "slug": "animation-5"}, {"path": "khan/partner-content/pixar/animate/parametric-curves/linear-interpolation/", "id": "linear-interpolation", "title": "Linear interpolation", "description": "Calculate the position of a point using linear interpolation", "slug": "linear-interpolation", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/animate/parametric-curves/a6-final/", "id": "frd8j6fMuHo", "title": "2. Repeated linear interpolation", "kind": "Video", "description": "First we'll review de Castlejau's algorithm using three points. Then it's your turn to figure out how to do it with 4 points!", "slug": "a6-final"}, {"path": "khan/partner-content/pixar/animate/parametric-curves/animation7/", "id": "TlxSlwQiYgM", "title": "3. de Castlejau's algorithm", "kind": "Video", "description": "We can use de Castlejau's algorithm to calculate curves using any number of points.", "slug": "animation7"}, {"path": "khan/partner-content/pixar/animate/parametric-curves/animation-8/", "id": "qHU0pQXHU2w", "title": "4. What degree are these curves?", "kind": "Video", "description": "Bonus! In this video we'll connect the degree of these curves to the number of control points\u00a0in the construction.", "slug": "animation-8"}], "in_knowledge_map": false, "description": "This lesson begins with linear interpolation and builds to Bezier curves using de Castiljau's algorithm. It's great to try after you've finished the Environment Modeling topic. It's appropriate for grade 8 through high school and takes 30-40 minutes.", "node_slug": "parametric-curves", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/animate/parametric-curves", "extended_slug": "partner-content/pixar/animate/parametric-curves", "kind": "Topic", "slug": "parametric-curves"}], "in_knowledge_map": false, "description": "Explore how animators bring characters to life using different kinds of animation curves.", "node_slug": "animate", "render_type": "Topic", "topic_page_url": "/partner-content/pixar/animate", "extended_slug": "partner-content/pixar/animate", "kind": "Topic", "slug": "animate"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/pixar/crowds/", "id": "crowds", "hide": false, "title": "Crowds", "child_data": [{"kind": "Topic", "id": "x01b4c2df"}, {"kind": "Topic", "id": "x1da13660"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/crowds/crowds-1/", "id": "crowds-1", "hide": false, "title": "Building crowds", "child_data": [{"kind": "Article", "id": "x4eeb0e55"}, {"kind": "Video", "id": "x6684c598"}, {"kind": "Video", "id": "xbc0f8087"}, {"kind": "Scratchpad", "id": "6064788376518656"}, {"kind": "Video", "id": "xbc77794e"}, {"kind": "Exercise", "id": "x0fcd8c87"}, {"kind": "Video", "id": "xda06d014"}, {"kind": "Video", "id": "xda2a7902"}, {"kind": "Scratchpad", "id": "5024423806631936"}, {"kind": "Video", "id": "x820bb85f"}, {"kind": "Scratchpad", "id": "6632222667964416"}, {"kind": "Video", "id": "x1fa24cd9"}, {"kind": "Article", "id": "xb5d11e1c"}], "children": [{"path": "khan/partner-content/pixar/crowds/crowds-1/intro-crowds/", "id": "5RL64wceWGI", "title": "Introduction to combinatorics", "kind": "Video", "description": "Overview of this topic", "slug": "intro-crowds"}, {"path": "khan/partner-content/pixar/crowds/crowds-1/combinatorics1/", "id": "UGad0bvDw9Q", "title": "1. Counting with tables", "kind": "Video", "description": "How do we keep track of how many robots we've made?", "slug": "combinatorics1"}, {"path": "khan/partner-content/pixar/crowds/crowds-1/combinatorics2/", "id": "rZYZedhcWGo", "title": "2. Robot combinations", "kind": "Video", "description": "Let's review the multiplication principle which allows us to quickly count the number of possible robots.", "slug": "combinatorics2"}, {"path": "khan/partner-content/pixar/crowds/crowds-1/robot-combinations/", "id": "robot-combinations", "title": "Exercise: robot combinations", "description": "Practice counting robot combinations with two parts", "slug": "robot-combinations", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/crowds/crowds-1/combinatorics3/", "id": "saHVVgvRX1Q", "title": "3. Tree challenge", "kind": "Video", "description": "How can trees be combined to count robots with many parts?", "slug": "combinatorics3"}, {"path": "khan/partner-content/pixar/crowds/crowds-1/combinatorics4/", "id": "lP3yTE_Ket8", "title": "4. Counting with trees", "kind": "Video", "description": "Tree diagrams allow us to visualize these counting problems using any number of parts.", "slug": "combinatorics4"}, {"path": "khan/partner-content/pixar/crowds/crowds-1/combinatorics5/", "id": "9rrEHyBZ5MU", "title": "5. Casting challenge", "kind": "Video", "description": "Now it's your turn to drive. In this video we'll present you with a casting challenge to complete using everything we've learned so far.", "slug": "combinatorics5"}, {"path": "khan/partner-content/pixar/crowds/crowds-1/meet-fran-kalal/", "id": "7iWHIx3kwPc", "title": "Getting to know Fran Kalal", "kind": "Video", "slug": "meet-fran-kalal"}], "in_knowledge_map": false, "description": "Discover how combinations were used to design crowds of robots in WALL-E. This lesson introduces the counting principle using tree diagrams. It touches on concepts in grades 4 through 7 and takes 30-45 minutes.", "node_slug": "crowds-1", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/crowds/crowds-1", "extended_slug": "partner-content/pixar/crowds/crowds-1", "kind": "Topic", "slug": "crowds-1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/crowds/crowds2/", "id": "crowds2", "hide": false, "title": "Counting crowds", "child_data": [{"kind": "Article", "id": "x13f9ee38"}, {"kind": "Video", "id": "xe2e16946"}, {"kind": "Exercise", "id": "xb687b289"}, {"kind": "Video", "id": "x58aa50dc"}, {"kind": "Scratchpad", "id": "5327288865521664"}, {"kind": "Video", "id": "x9ea12d9e"}, {"kind": "Exercise", "id": "x2f791dba"}, {"kind": "Video", "id": "x7958cad3"}, {"kind": "Exercise", "id": "xdb3809fd"}, {"kind": "Video", "id": "xcbf1fb58"}, {"kind": "Exercise", "id": "x102f5e19"}, {"kind": "Video", "id": "xa6ee0353"}, {"kind": "Exercise", "id": "937485754"}], "children": [{"path": "khan/partner-content/pixar/crowds/crowds2/combinatorics6/", "id": "QVHuSq_793A", "title": "1. Two headed robots", "kind": "Video", "description": "What happens if the director changes their mind and ask for two headed robots?", "slug": "combinatorics6"}, {"path": "khan/partner-content/pixar/crowds/crowds2/robot-combinations-2/", "id": "robot-combinations-2", "title": "Counting two-headed robots", "description": "Practice counting robot combinations with multiple parts", "slug": "robot-combinations-2", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/crowds/crowds2/combinatorics7/", "id": "mAT8MLB3XpA", "title": "2. Snake bots", "kind": "Video", "description": "Let's build some snake to get us thinking about permutations.", "slug": "combinatorics7"}, {"path": "khan/partner-content/pixar/crowds/crowds2/combinatorics8/", "id": "-FquswEIswk", "title": "3. Calculating factorials", "kind": "Video", "description": "Now that we have a feeling for constructing permutations let's introduce the factorial formula to make counting them easy.", "slug": "combinatorics8"}, {"path": "khan/partner-content/pixar/crowds/crowds2/calculating-factorials/", "id": "calculating-factorials", "title": "Calculating factorials", "description": "Understand how to calculate and use factorials", "slug": "calculating-factorials", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/crowds/crowds2/combinatorics9/", "id": "j7ley8tRBd0", "title": "4. Casting problem", "kind": "Video", "description": "Now it's time for a really meaty problem! How can we count the number of possible casts when given a large set of robots to choose from?", "slug": "combinatorics9"}, {"path": "khan/partner-content/pixar/crowds/crowds2/counting-actors/", "id": "counting-actors", "title": "Counting casts 1", "description": "Counting actors", "slug": "counting-actors", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/crowds/crowds2/crowds10/", "id": "OVzIjV0yRmw", "title": "5. Does order matter?", "kind": "Video", "description": "Why do we divide the number of combinations by the number of permutations?", "slug": "crowds10"}, {"path": "khan/partner-content/pixar/crowds/crowds2/counting-casts-2/", "id": "counting-casts-2", "title": "Counting casts 2", "description": "Counting casts", "slug": "counting-casts-2", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/crowds/crowds2/combinatorics11/", "id": "Eo21CfNJfCs", "title": "6. Binomial coefficient", "kind": "Video", "description": "Let's put everything together. Get ready for a really powerful formula: the binomial coefficient (warning: you may need to watch this a few times!)", "slug": "combinatorics11"}, {"path": "khan/partner-content/pixar/crowds/crowds2/combinations_1/", "id": "combinations_1", "title": "Combinations", "description": "Introductory combination problems", "slug": "combinations_1", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this lesson we construct snakes using permutations and develop a powerful counting tool: the binomial coefficient. It touches on concepts in grade 6 through high school and takes 45-60 minutes.", "node_slug": "crowds2", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/crowds/crowds2", "extended_slug": "partner-content/pixar/crowds/crowds2", "kind": "Topic", "slug": "crowds2"}], "in_knowledge_map": false, "description": "Explore how swarms of robots in Wall-E were made using combinatorics.", "node_slug": "crowds", "render_type": "Topic", "topic_page_url": "/partner-content/pixar/crowds", "extended_slug": "partner-content/pixar/crowds", "kind": "Topic", "slug": "crowds"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/pixar/sets/", "id": "sets", "hide": false, "title": "Sets & Staging", "child_data": [{"kind": "Topic", "id": "x726f62ed"}, {"kind": "Topic", "id": "x5588a18b"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/sets/sets1/", "id": "sets1", "hide": false, "title": "Geometric transformations", "child_data": [{"kind": "Article", "id": "x286833db"}, {"kind": "Video", "id": "x2563c48d"}, {"kind": "Video", "id": "x797c87e3"}, {"kind": "Exercise", "id": "2016"}, {"kind": "Video", "id": "x9288f81a"}, {"kind": "Article", "id": "x4cc03439"}, {"kind": "Video", "id": "x92d74aa2"}, {"kind": "Article", "id": "xfb86bfb2"}, {"kind": "Video", "id": "x29d4fc0f"}, {"kind": "Exercise", "id": "xef584049"}, {"kind": "Video", "id": "x273ea32e"}, {"kind": "Article", "id": "x0070fecb"}, {"kind": "Video", "id": "x16b402e5"}, {"kind": "Exercise", "id": "xc0950555"}, {"kind": "Video", "id": "x1fa24cd9"}], "children": [{"path": "khan/partner-content/pixar/sets/sets1/sets-overview/", "id": "lR0kyOdT86E", "title": "Introduction to geometric transformations", "kind": "Video", "description": "how are virtual sets built in the computer?", "slug": "sets-overview"}, {"path": "khan/partner-content/pixar/sets/sets1/sets-1/", "id": "Z_m9_WOdZ_k", "title": "1. Coordinate plane", "kind": "Video", "description": "This video introduces the transformations we'll be using in the rest of this lesson.", "slug": "sets-1"}, {"path": "khan/partner-content/pixar/sets/sets1/graphing_points/", "id": "graphing_points", "title": "Graphing points", "description": "Plot a given point on the coordinate plane.", "slug": "graphing_points", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/sets/sets1/sets-2/", "id": "C_HcAE8IUqQ", "title": "2. Translation", "kind": "Video", "description": "Now we can begin laying out our scene! Starting with translation...", "slug": "sets-2"}, {"path": "khan/partner-content/pixar/sets/sets1/set-3/", "id": "T_NdGA0CcXI", "title": "3. Scaling", "kind": "Video", "description": "Next we need to explore the mathematics of scaling.", "slug": "set-3"}, {"path": "khan/partner-content/pixar/sets/sets1/sets-4/", "id": "wbksgG0dQoE", "title": "4. Commutativity", "kind": "Video", "description": "We need to be careful with the order of scaling and translation. But why?", "slug": "sets-4"}, {"path": "khan/partner-content/pixar/sets/sets1/commutative-and-non-commutative-transformations/", "id": "commutative-and-non-commutative-transformations", "title": "Commutative and non-commutative transformations", "description": "Understand which sets of transformations are commutative.", "slug": "commutative-and-non-commutative-transformations", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/sets/sets1/sets-5/", "id": "59XYyyia1Fk", "title": "5. Rotation", "kind": "Video", "description": "Finally we'll need to rotate object to finish our scene.", "slug": "sets-5"}, {"path": "khan/partner-content/pixar/sets/sets1/sets-6/", "id": "RqUfUxaY6HU", "title": "6. Composite transformations", "kind": "Video", "description": "Time to get a little mathy. Let's look at the general form for any transformation.", "slug": "sets-6"}, {"path": "khan/partner-content/pixar/sets/sets1/combining-transformations/", "id": "combining-transformations", "title": "Composite transformations", "description": "Understand the result of combining different transformations", "slug": "combining-transformations", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/sets/sets1/meet-fran-kalal/", "id": "7iWHIx3kwPc", "title": "Getting to know Fran Kalal", "kind": "Video", "slug": "meet-fran-kalal"}], "in_knowledge_map": false, "description": "In this lesson you'll be given a scene from the Art Department to build. We'll explore how the operations of translation, rotation and scaling are used to position objects. It touches on concepts from Grades 7/8 and takes 50-60 minutes to complete.", "node_slug": "sets1", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/sets/sets1", "extended_slug": "partner-content/pixar/sets/sets1", "kind": "Topic", "slug": "sets1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/sets/rotation/", "id": "rotation", "hide": false, "title": "Mathematics of rotation", "child_data": [{"kind": "Article", "id": "xead33e9a"}, {"kind": "Video", "id": "x5068a228"}, {"kind": "Exercise", "id": "xdebb66da"}, {"kind": "Video", "id": "x5ee97b6c"}, {"kind": "Exercise", "id": "xb61e6c16"}, {"kind": "Video", "id": "xe78a6df3"}, {"kind": "Exercise", "id": "x0cbcf54b"}], "children": [{"path": "khan/partner-content/pixar/sets/rotation/set-7/", "id": "Je4GicbcyLU", "title": "1. How do we rotate points?", "kind": "Video", "description": "First let's think about how to rotate some really simple points such as (0,0) and (1,0)\nClick here to review basic trig ratios.", "slug": "set-7"}, {"path": "khan/partner-content/pixar/sets/rotation/rotating-a-point-around-the-origin/", "id": "rotating-a-point-around-the-origin", "title": "Rotating a point around the origin", "description": "Find the coordinates of a point after it has been rotated about the origin", "slug": "rotating-a-point-around-the-origin", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/sets/rotation/sets-8/", "id": "VcnU7cu6j5Y", "title": "2. Geometry of rotation", "kind": "Video", "description": "Next lets build a diagram that break rotation into smaller parts. The next exercise will give us a chance to build our understanding of this diagram.\nClick here to learn about rotation using linear transformations", "slug": "sets-8"}, {"path": "khan/partner-content/pixar/sets/rotation/understanding-rotation-of-arbitrary-points/", "id": "understanding-rotation-of-arbitrary-points", "title": "Understanding rotation of arbitrary points", "description": "Understand how we can derive a formula for the rotation of any point around the origin.", "slug": "understanding-rotation-of-arbitrary-points", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/sets/rotation/sets-9/", "id": "yGbwnYQjRjA", "title": "3. Completing the proof", "kind": "Video", "description": "In this video we'll uncover the connection between the previous diagram and the rotation formulas. Repeat viewing suggested!", "slug": "sets-9"}, {"path": "khan/partner-content/pixar/sets/rotation/rotating-a-point-around-the-origin-2/", "id": "rotating-a-point-around-the-origin-2", "title": "Rotating a point around the origin 2", "description": "Rotating a point not on an axis around the origin", "slug": "rotating-a-point-around-the-origin-2", "kind": "Exercise"}], "in_knowledge_map": false, "description": "This lesson will push you to derive the rotation formulas we used in lesson 1. So roll up your sleeves! It's appropriate for the high school level and takes 35-45min.", "node_slug": "rotation", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/sets/rotation", "extended_slug": "partner-content/pixar/sets/rotation", "kind": "Topic", "slug": "rotation"}], "in_knowledge_map": false, "description": "Explore how virtual sets are constructed using geometric transformations.", "node_slug": "sets", "render_type": "Topic", "topic_page_url": "/partner-content/pixar/sets", "extended_slug": "partner-content/pixar/sets", "kind": "Topic", "slug": "sets"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/pixar/rendering/", "id": "rendering", "hide": false, "title": "Rendering", "child_data": [{"kind": "Topic", "id": "x68280555"}, {"kind": "Topic", "id": "xb55ad5dd"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/rendering/rendering1/", "id": "rendering1", "hide": false, "title": "Rendering 101", "child_data": [{"kind": "Article", "id": "x0390637f"}, {"kind": "Video", "id": "x55d3cfdb"}, {"kind": "Video", "id": "x4073c355"}, {"kind": "Exercise", "id": "x99ede50b"}, {"kind": "Video", "id": "x227b7a9d"}, {"kind": "Exercise", "id": "x9bd589d8"}, {"kind": "Video", "id": "xc5b32b35"}, {"kind": "Exercise", "id": "xcda721dc"}, {"kind": "Video", "id": "xbfe83d28"}, {"kind": "Video", "id": "x09b26876"}], "children": [{"path": "khan/partner-content/pixar/rendering/rendering1/overview-rendering/", "id": "NEzJH-JrAdw", "title": "Introduction to rendering", "kind": "Video", "description": "Overview of this topic", "slug": "overview-rendering"}, {"path": "khan/partner-content/pixar/rendering/rendering1/rendering-1/", "id": "6owqvwty_UQ", "title": "1. What is ray tracing?", "kind": "Video", "description": "Introduction to the basics of ray tracing.", "slug": "rendering-1"}, {"path": "khan/partner-content/pixar/rendering/rendering1/ray-tracing/", "id": "ray-tracing", "title": "Ray tracing", "description": "Find a ray that hits a specific target", "slug": "ray-tracing", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/rendering/rendering1/rendering-2/", "id": "Kuqm8Y3tUxY", "title": "2. Light reflection", "kind": "Video", "description": "Let's look more closely at how light behaves when it strikes an object. We'll cover diffuse and specular surface responses.", "slug": "rendering-2"}, {"path": "khan/partner-content/pixar/rendering/rendering1/matching-properties-of-lighting/", "id": "matching-properties-of-lighting", "title": "Matching properties of lighting", "description": "Adjust light properties to match an image", "slug": "matching-properties-of-lighting", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/rendering/rendering1/rendering-3/", "id": "y5aFEfFwsLQ", "title": "3. Light rays", "kind": "Video", "description": "Let's look more closely at how light bounces when it strikes an object. We'll cover reflected and refracted rays.\nClick here for more detail on refraction!", "slug": "rendering-3"}, {"path": "khan/partner-content/pixar/rendering/rendering1/light-rays/", "id": "light-rays", "title": "Light rays", "description": "Review reflected, refracted, shadow and camera rays.", "slug": "light-rays", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/rendering/rendering1/render-4/", "id": "bwwmq2be1So", "title": "4. Rendering Mike Wazowski", "kind": "Video", "description": "Case study from Monsters University", "slug": "render-4"}, {"path": "khan/partner-content/pixar/rendering/rendering1/susan-fong/", "id": "_r57JvsDVCc", "title": "Getting to know Susan Fong", "kind": "Video", "description": "Find out more about Susan Fong!", "slug": "susan-fong"}], "in_knowledge_map": false, "description": "Discover the basics behind the rendering equation. This lesson is designed for all ages and takes 35-40 minutes.", "node_slug": "rendering1", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/rendering/rendering1", "extended_slug": "partner-content/pixar/rendering/rendering1", "kind": "Topic", "slug": "rendering1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/pixar/rendering/rendering-2/", "id": "rendering-2", "hide": false, "title": "Mathematics of Rendering", "child_data": [{"kind": "Article", "id": "xc8229f62"}, {"kind": "Video", "id": "x894807a8"}, {"kind": "Exercise", "id": "xb2ad7892"}, {"kind": "Video", "id": "x03b6b9b8"}, {"kind": "Exercise", "id": "x1899f497"}, {"kind": "Video", "id": "xdd89aa6a"}, {"kind": "Exercise", "id": "xc3963661"}, {"kind": "Video", "id": "x637f7234"}, {"kind": "Exercise", "id": "xbcff3ac3"}, {"kind": "Video", "id": "xb97c6b84"}, {"kind": "Exercise", "id": "x6984c32d"}, {"kind": "Video", "id": "x7b295477"}, {"kind": "Exercise", "id": "x19cfec25"}], "children": [{"path": "khan/partner-content/pixar/rendering/rendering-2/rendering-5/", "id": "-4s4vYJnIW4", "title": "1. Ray tracing intutiion", "kind": "Video", "description": "First let's look at ray tracing in 2D using a simple example", "slug": "rendering-5"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/2d-rendering-intuition/", "id": "2d-rendering-intuition", "title": "2D rendering intuition", "description": "Introduction to rendering in 2D", "slug": "2d-rendering-intuition", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/rendering-6/", "id": "oPTRwYdOEAM", "title": "2. Parametric form of a ray", "kind": "Video", "description": "This video introduces the parametric form of a ray in 2D.\nClick here to review weighted averages of 2 points.\nClick here to review slope-intercept form of a line.", "slug": "rendering-6"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/parametric-ray-intuition/", "id": "parametric-ray-intuition", "title": "Parametric ray intuition", "description": "Review the parametric representation of a ray", "slug": "parametric-ray-intuition", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/rendering-7/", "id": "Mm7ZmL9zfpQ", "title": "3. Calculate intersection point", "kind": "Video", "description": "Now we are ready to calculate an intersection point using our ray CP (parametric form) and our line AB (slope-intercept form).", "slug": "rendering-7"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/solve-for-t/", "id": "solve-for-t", "title": "Solve for t", "description": "Practice solving for t", "slug": "solve-for-t", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/rendering-8/", "id": "b0cgLILc2Eo", "title": "4. Using the line equation", "kind": "Video", "description": "Next we need to throw away the slope-intercept form and use the line equation instead.\nClick here to see why dividing by zero is bad.", "slug": "rendering-8"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/ray-intersection-with-line/", "id": "ray-intersection-with-line", "title": "Ray intersection with line", "description": "Find where a ray intersects with a line in implicit form", "slug": "ray-intersection-with-line", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/rendering-9/", "id": "KCSGeTdjWiI", "title": "5. 3D ray tracing part 1", "kind": "Video", "description": "Now we are ready to ray trace in 3D. We'll look at the problem of ray triangle intersection.\nClick here for more detail on the plane equation.", "slug": "rendering-9"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/ray-intersection-with-plane/", "id": "ray-intersection-with-plane", "title": "Ray intersection with plane", "description": "Calculate the point at which a ray intersects with a plane in three dimensions.", "slug": "ray-intersection-with-plane", "kind": "Exercise"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/rendering-10/", "id": "HjDQxAFSwEo", "title": "6. 3D ray tracing part 2", "kind": "Video", "description": "Now we just need to determine whether our intersection point is inside or outside the triangle.\nClick here to review weighted averages of three points.", "slug": "rendering-10"}, {"path": "khan/partner-content/pixar/rendering/rendering-2/triangle-intersection-3d/", "id": "triangle-intersection-3d", "title": "Triangle intersection in 3D", "description": "Calculating whether a point is inside a triangle in 3D", "slug": "triangle-intersection-3d", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Explore the most fundamental calculation a ray tracer does: line-plane intersection in 2D and 3D. This lesson involves solving systems of equations and is appropriate for the advanced high school level. It takes at least 60 minutes to complete.", "node_slug": "rendering-2", "render_type": "Tutorial", "topic_page_url": "/partner-content/pixar/rendering/rendering-2", "extended_slug": "partner-content/pixar/rendering/rendering-2", "kind": "Topic", "slug": "rendering-2"}], "in_knowledge_map": false, "description": "Explore how pixels are painted digitally using algebra.", "node_slug": "rendering", "render_type": "Topic", "topic_page_url": "/partner-content/pixar/rendering", "extended_slug": "partner-content/pixar/rendering", "kind": "Topic", "slug": "rendering"}], "in_knowledge_map": false, "description": "A collaboration between Pixar Animation Studios and Khan Academy.\n\nSponsored by Disney. Questions/Feedback: piab@khanacademy.org", "node_slug": "pixar", "render_type": "Subject", "topic_page_url": "/partner-content/pixar", "extended_slug": "partner-content/pixar", "kind": "Topic", "slug": "pixar"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/nasa/", "id": "nasa", "hide": false, "title": "NASA", "child_data": [{"kind": "Topic", "id": "x7d2d01e6"}, {"kind": "Topic", "id": "x0b57fb25"}, {"kind": "Topic", "id": "xabe6c929"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/nasa/nasa-welcome/", "id": "nasa-welcome", "hide": false, "title": "Welcome to NASA Mission Control", "child_data": [{"kind": "Topic", "id": "x448700a0"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/nasa/nasa-welcome/nasa-mission-control/", "id": "nasa-mission-control", "hide": false, "title": "Welcome", "child_data": [{"kind": "Video", "id": "x628bda5c"}], "children": [{"path": "khan/partner-content/nasa/nasa-welcome/nasa-mission-control/nasa-khan/", "id": "CcM2R6vIvfw", "title": "Khan Academy & NASA introduction", "kind": "Video", "description": "A brief overview of the topics you can explore!", "slug": "nasa-khan"}], "in_knowledge_map": false, "description": "This video is a short introduction to the resources developed by NASA and Khan Academy.", "node_slug": "nasa-mission-control", "render_type": "Tutorial", "topic_page_url": "/partner-content/nasa/nasa-welcome/nasa-mission-control", "extended_slug": "partner-content/nasa/nasa-welcome/nasa-mission-control", "kind": "Topic", "slug": "nasa-mission-control"}], "in_knowledge_map": false, "description": "Welcome to NASA Mission control, an introduction to the learning and exploration adventures offered in cooperation between NASA and Khan Academy!", "node_slug": "nasa-welcome", "render_type": "Topic", "topic_page_url": "/partner-content/nasa/nasa-welcome", "extended_slug": "partner-content/nasa/nasa-welcome", "kind": "Topic", "slug": "nasa-welcome"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/nasa/measuringuniverse/", "id": "measuringuniverse", "hide": false, "title": "Measuring the Universe", "child_data": [{"kind": "Topic", "id": "x2c0281d9"}, {"kind": "Topic", "id": "x45352af5"}, {"kind": "Topic", "id": "x8ed3ba1e"}, {"kind": "Topic", "id": "x5eee2885"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/nasa/measuringuniverse/spacemath1/", "id": "spacemath1", "hide": false, "title": "Modeling the solar system", "child_data": [{"kind": "Article", "id": "xe381c886"}, {"kind": "Article", "id": "x216e4a8b"}, {"kind": "Article", "id": "xfc920971"}, {"kind": "Scratchpad", "id": "5218123607179264"}, {"kind": "Video", "id": "xc954f3ea"}, {"kind": "Video", "id": "x8f97ca11"}, {"kind": "Scratchpad", "id": "1486460294"}, {"kind": "Article", "id": "x799c2466"}, {"kind": "Scratchpad", "id": "1946032261"}, {"kind": "Exercise", "id": "xc4e55acf"}], "children": [{"path": "khan/partner-content/nasa/measuringuniverse/spacemath1/conjunctions/", "id": "-DlCeZw9RFw", "title": "Conjunctions", "kind": "Video", "description": "The three brightest planets in the night sky on May 26th, 2013 lined up for a beautiful sunset conjunction.", "slug": "conjunctions"}, {"path": "khan/partner-content/nasa/measuringuniverse/spacemath1/lunareclipse/", "id": "wuhNZejHeBg", "title": "Lunar eclipse", "kind": "Video", "description": "When the moon passes through the Earth's shadow, it causes the moon to look very unusual for a short period of time. This event is called a lunar eclipse, and it occurs roughly twice a year.", "slug": "lunareclipse"}, {"path": "khan/partner-content/nasa/measuringuniverse/spacemath1/mtu-1-unit-quiz/", "id": "mtu-1-unit-quiz", "title": "Modelling the solar system", "slug": "mtu-1-unit-quiz", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Astronomy begins when we look up and start asking questions. Where are we? How big is the earth? This lesson is for all ages, start here!", "node_slug": "spacemath1", "render_type": "Tutorial", "topic_page_url": "/partner-content/nasa/measuringuniverse/spacemath1", "extended_slug": "partner-content/nasa/measuringuniverse/spacemath1", "kind": "Topic", "slug": "spacemath1"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/nasa/measuringuniverse/measure_the_solarsystem/", "id": "measure_the_solarsystem", "hide": false, "title": "Measuring the solar system", "child_data": [{"kind": "Article", "id": "x40113e8c"}, {"kind": "Exercise", "id": "899036662"}, {"kind": "Video", "id": "xcbbafdfa"}, {"kind": "Article", "id": "xfb176b82"}, {"kind": "Exercise", "id": "x8fd83a93"}, {"kind": "Article", "id": "xbf1564d4"}, {"kind": "Article", "id": "x2bf08af0"}, {"kind": "Exercise", "id": "xe16125c8"}, {"kind": "Exercise", "id": "592471461"}, {"kind": "Article", "id": "x53199d8c"}, {"kind": "Exercise", "id": "x31ff13bf"}, {"kind": "Article", "id": "x5aefc41c"}, {"kind": "Article", "id": "xcce95a0d"}, {"kind": "Exercise", "id": "x8f4dd37d"}, {"kind": "Article", "id": "x17fdd7ef"}, {"kind": "Exercise", "id": "729523853"}, {"kind": "Article", "id": "xd6bb16ec"}, {"kind": "Video", "id": "8187269"}], "children": [{"path": "khan/partner-content/nasa/measuringuniverse/measure_the_solarsystem/circles_and_arcs/", "id": "circles_and_arcs", "title": "Circles and arcs", "description": "Relate the length of an arc to the circumference of a whole circle.", "slug": "circles_and_arcs", "kind": "Exercise"}, {"path": "khan/partner-content/nasa/measuringuniverse/measure_the_solarsystem/eratosthenes_measures_earth/", "id": "rIF6Vj6pVNg", "title": "Circumference of Earth", "kind": "Video", "slug": "eratosthenes_measures_earth"}, {"path": "khan/partner-content/nasa/measuringuniverse/measure_the_solarsystem/occultation-transit-eclipse/", "id": "occultation-transit-eclipse", "title": "Occultation vs. transit vs. eclipse", "slug": "occultation-transit-eclipse", "kind": "Exercise"}, {"path": "khan/partner-content/nasa/measuringuniverse/measure_the_solarsystem/angular-measure-1/", "id": "angular-measure-1", "title": "Angular measure 1", "description": "warm up questions on angular measure", "slug": "angular-measure-1", "kind": "Exercise"}, {"path": "khan/partner-content/nasa/measuringuniverse/measure_the_solarsystem/trigonometry_05/", "id": "trigonometry_0.5", "title": "Trigonometry 0.5", "slug": "trigonometry_05", "kind": "Exercise"}, {"path": "khan/partner-content/nasa/measuringuniverse/measure_the_solarsystem/angular-measure-2/", "id": "angular-measure-2", "title": "Angular Measure 2", "slug": "angular-measure-2", "kind": "Exercise"}, {"path": "khan/partner-content/nasa/measuringuniverse/measure_the_solarsystem/parallax-method/", "id": "parallax-method", "title": "Parallax method", "slug": "parallax-method", "kind": "Exercise"}, {"path": "khan/partner-content/nasa/measuringuniverse/measure_the_solarsystem/solving_similar_triangles_2/", "id": "solving_similar_triangles_2", "title": "Solving similar triangles 2", "slug": "solving_similar_triangles_2", "kind": "Exercise"}, {"path": "khan/partner-content/nasa/measuringuniverse/measure_the_solarsystem/scale-of-solar-system/", "id": "GP53b__h4ew", "title": "Scale of solar system", "kind": "Video", "description": "Sal Khan describes the scale of our Solar System.", "slug": "scale-of-solar-system"}], "in_knowledge_map": false, "description": "How can we apply geometry and trigonometry in order to measure the size of the earth, moon and sun?", "node_slug": "measure_the_solarsystem", "render_type": "Tutorial", "topic_page_url": "/partner-content/nasa/measuringuniverse/measure_the_solarsystem", "extended_slug": "partner-content/nasa/measuringuniverse/measure_the_solarsystem", "kind": "Topic", "slug": "measure_the_solarsystem"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/nasa/measuringuniverse/orbital-mechanics/", "id": "orbital-mechanics", "hide": false, "title": "Orbital mechanics 1", "child_data": [{"kind": "Article", "id": "xd1f8af4d"}, {"kind": "Article", "id": "x6362146d"}, {"kind": "Exercise", "id": "x6db5022d"}, {"kind": "Article", "id": "xa9da7de1"}, {"kind": "Scratchpad", "id": "4765722391609344"}, {"kind": "Article", "id": "x1ed7ecf5"}, {"kind": "Video", "id": "23526"}, {"kind": "Exercise", "id": "213284163"}, {"kind": "Scratchpad", "id": "2645257771"}], "children": [{"path": "khan/partner-content/nasa/measuringuniverse/orbital-mechanics/area-and-circumference-of-circles/", "id": "area-and-circumference-of-circles", "title": "Problem solving with area and circumference of circles", "description": "Practice interesting area and circumference problems.", "slug": "area-and-circumference-of-circles", "kind": "Exercise"}, {"path": "khan/partner-content/nasa/measuringuniverse/orbital-mechanics/conic-sections-intro-to-ellipses/", "id": "lvAYFUIEpFI", "title": "Conic sections: Intro to ellipses", "kind": "Video", "description": "Introduction to the ellipse.", "slug": "conic-sections-intro-to-ellipses"}, {"path": "khan/partner-content/nasa/measuringuniverse/orbital-mechanics/equation_of_an_ellipse/", "id": "equation_of_an_ellipse", "title": "Equation of an ellipse", "description": "Find the center and major and minor radius of an ellipse given its equation.", "slug": "equation_of_an_ellipse", "kind": "Exercise"}], "in_knowledge_map": false, "description": "How do planets move? An introduction to orbital mechanics and the work of Johannes Kepler.", "node_slug": "orbital-mechanics", "render_type": "Tutorial", "topic_page_url": "/partner-content/nasa/measuringuniverse/orbital-mechanics", "extended_slug": "partner-content/nasa/measuringuniverse/orbital-mechanics", "kind": "Topic", "slug": "orbital-mechanics"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/", "id": "spectroscopy", "hide": false, "title": "Spectroscopy", "child_data": [{"kind": "Article", "id": "x631ab5fd"}, {"kind": "Video", "id": "xa4fb6947"}, {"kind": "Video", "id": "x1b39a823"}, {"kind": "Video", "id": "x0e99a6f6"}, {"kind": "Article", "id": "xf43a2dbf"}, {"kind": "Exercise", "id": "x88d46bd9"}, {"kind": "Video", "id": "x9fb522a8"}, {"kind": "Video", "id": "x3361ef2c"}, {"kind": "Video", "id": "x883cccaf"}, {"kind": "Video", "id": "xf85c8a38"}, {"kind": "Video", "id": "xb0657b16"}, {"kind": "Video", "id": "xd8b817bc"}], "children": [{"path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/visible-light-waves/", "id": "PMtC34pzKGc", "title": "Visible light (1672)", "kind": "Video", "slug": "visible-light-waves"}, {"path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/infrared-waves/", "id": "i8caGm9Fmh0", "title": "Infrared waves (1800)", "kind": "Video", "slug": "infrared-waves"}, {"path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/tour-of-the-ems-06-ultraviolet-waves/", "id": "QW5zeVy8aE0", "title": "Ultraviolet waves (1801)", "kind": "Video", "slug": "tour-of-the-ems-06-ultraviolet-waves"}, {"path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/absorption-emission-lines/", "id": "absorption-emission-lines", "title": "Absorption lines", "slug": "absorption-emission-lines", "kind": "Exercise"}, {"path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/spectroscopy-in-action/", "id": "SPgYrsONgwU", "title": "Spectroscopy", "kind": "Video", "slug": "spectroscopy-in-action"}, {"path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/tour-of-the-ems-02-radio-waves/", "id": "OzDmEA8x0nQ", "title": "Radio waves (1888)", "kind": "Video", "slug": "tour-of-the-ems-02-radio-waves"}, {"path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/x-rays/", "id": "CCAYcuCWOnM", "title": "X-rays (1895)", "kind": "Video", "slug": "x-rays"}, {"path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/gamma-waves/", "id": "TA5SLDiIUWs", "title": "Gamma waves (1900)", "kind": "Video", "slug": "gamma-waves"}, {"path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/microwaves/", "id": "UZeBzTI5Omk", "title": "Microwaves (1930)", "kind": "Video", "slug": "microwaves"}, {"path": "khan/partner-content/nasa/measuringuniverse/spectroscopy/spitzer_telescope/", "id": "368K0iQv8nE", "title": "Spitzer telescope", "kind": "Video", "description": "400 years of Astronomy using Telescopes. To commemorate this International Year of Astronomy, three of NASA's flagship observatories have put a new spin on how we see the Pinwheel Galaxy!", "slug": "spitzer_telescope"}], "in_knowledge_map": false, "description": "There is much more to light than meets the eye. Introduction to the electromagnetic spectrum and the science of spectroscopy.", "node_slug": "spectroscopy", "render_type": "Tutorial", "topic_page_url": "/partner-content/nasa/measuringuniverse/spectroscopy", "extended_slug": "partner-content/nasa/measuringuniverse/spectroscopy", "kind": "Topic", "slug": "spectroscopy"}], "in_knowledge_map": false, "description": "How have we applied science and mathematics to understand our solar system?", "node_slug": "measuringuniverse", "render_type": "Topic", "topic_page_url": "/partner-content/nasa/measuringuniverse", "extended_slug": "partner-content/nasa/measuringuniverse", "kind": "Topic", "slug": "measuringuniverse"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/nasa/searchingforlife/", "id": "searchingforlife", "hide": false, "title": "Exploring the Universe", "child_data": [{"kind": "Topic", "id": "x6f9ead8b"}, {"kind": "Topic", "id": "x113eac5f"}, {"kind": "Topic", "id": "x730b9b48"}, {"kind": "Topic", "id": "xc0f3b6e3"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/nasa/searchingforlife/exploring_mars_ancient/", "id": "exploring_mars_ancient", "hide": false, "title": "Mars: Ancient observations", "child_data": [{"kind": "Article", "id": "xff86f562"}, {"kind": "Scratchpad", "id": "5145009707810816"}, {"kind": "Article", "id": "x07fb9c67"}, {"kind": "Article", "id": "x2255bc62"}, {"kind": "Video", "id": "x4662c6b2"}, {"kind": "Video", "id": "x2744d8e7"}, {"kind": "Exercise", "id": "xee654879"}], "children": [{"path": "khan/partner-content/nasa/searchingforlife/exploring_mars_ancient/mars-in-a-minute-is-mars-really-red/", "id": "Q7UL8hvlk7k", "title": "Is Mars really red?", "kind": "Video", "description": "Mars in a minute: Is Mars really red?", "slug": "mars-in-a-minute-is-mars-really-red"}, {"path": "khan/partner-content/nasa/searchingforlife/exploring_mars_ancient/mars-in-a-minute-is-mars-red-hot/", "id": "62zKxexJrIM", "title": "Temperature & atmosphere", "kind": "Video", "slug": "mars-in-a-minute-is-mars-red-hot"}, {"path": "khan/partner-content/nasa/searchingforlife/exploring_mars_ancient/ancient-observations/", "id": "ancient-observations", "title": "Ancient observations", "slug": "ancient-observations", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Where is Mars? How does it move? How far away is it? What are the conditions on the surface? This tutorial covers our initial observations of the Red Planet", "node_slug": "exploring_mars_ancient", "render_type": "Tutorial", "topic_page_url": "/partner-content/nasa/searchingforlife/exploring_mars_ancient", "extended_slug": "partner-content/nasa/searchingforlife/exploring_mars_ancient", "kind": "Topic", "slug": "exploring_mars_ancient"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/", "id": "mars-modern-exploration", "hide": false, "title": "Mars: Modern exploration", "child_data": [{"kind": "Article", "id": "xe96e6fd6"}, {"kind": "Scratchpad", "id": "2132245764"}, {"kind": "Scratchpad", "id": "972169665"}, {"kind": "Article", "id": "xc2e5ae89"}, {"kind": "Article", "id": "x2ed4be5c"}, {"kind": "Video", "id": "x8902c11d"}, {"kind": "Video", "id": "xc7aeac9f"}, {"kind": "Video", "id": "x4c8d0df3"}, {"kind": "Video", "id": "xa5492882"}, {"kind": "Video", "id": "x1bfd7d9e"}, {"kind": "Video", "id": "x9edcf1f1"}, {"kind": "Video", "id": "x4f2fa5aa"}, {"kind": "Video", "id": "x0dd56bae"}, {"kind": "Article", "id": "x2c38479a"}, {"kind": "Exercise", "id": "x461a1752"}, {"kind": "Scratchpad", "id": "1994911779"}], "children": [{"path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/nasa-viking-mission/", "id": "70aWb6xBrbg", "title": "Viking mission", "kind": "Video", "description": "Overview of the Viking mission", "slug": "nasa-viking-mission"}, {"path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/mars-global-surveyor/", "id": "ozHYnzvzoIc", "title": "Mars global surveyor", "kind": "Video", "slug": "mars-global-surveyor"}, {"path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/dry-ice-moves-on-mars/", "id": "mNXBfz1iVzc", "title": "Dry ice experiment", "kind": "Video", "slug": "dry-ice-moves-on-mars"}, {"path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/mars-pathfinder/", "id": "Q8uhzlJ5tws", "title": "Pathfinder", "kind": "Video", "description": "Short video introducing the people behind the Pathfinder mission.\u00a0For more information check out NASA's mission page", "slug": "mars-pathfinder"}, {"path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/mars-odyssey/", "id": "dMzX3odi1K8", "title": "Mars odyssey", "kind": "Video", "slug": "mars-odyssey"}, {"path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/mars-express/", "id": "hyWC_zPTLsI", "title": "Mars express", "kind": "Video", "description": "Summary of the Mars Express Orbiter.For more information check out the mission page.", "slug": "mars-express"}, {"path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/martian-methane/", "id": "HvHnYXpeRsA", "title": "Martian methane", "kind": "Video", "slug": "martian-methane"}, {"path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/a-tale-of-two-rovers/", "id": "8u6gNH6xIfc", "title": "Spirit & opportunity", "kind": "Video", "slug": "a-tale-of-two-rovers"}, {"path": "khan/partner-content/nasa/searchingforlife/mars-modern-exploration/modern-discoveries/", "id": "modern-discoveries", "title": "Modern discoveries", "slug": "modern-discoveries", "kind": "Exercise"}], "in_knowledge_map": false, "description": "What are the conditions on the surface of Mars? Does it have life? Does it have water? Was the ancient environment habitable on Mars? This tutorial covers 20th century discoveries.", "node_slug": "mars-modern-exploration", "render_type": "Tutorial", "topic_page_url": "/partner-content/nasa/searchingforlife/mars-modern-exploration", "extended_slug": "partner-content/nasa/searchingforlife/mars-modern-exploration", "kind": "Topic", "slug": "mars-modern-exploration"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/", "id": "mars_science_lab", "hide": false, "title": "Curiosity rover: mission briefing", "child_data": [{"kind": "Article", "id": "x63601e6a"}, {"kind": "Video", "id": "x4d78bb51"}, {"kind": "Article", "id": "x7b142f0f"}, {"kind": "Video", "id": "x732225f1"}, {"kind": "Article", "id": "x4f04f26f"}, {"kind": "Video", "id": "xec99bb91"}, {"kind": "Video", "id": "xc64fafb9"}, {"kind": "Article", "id": "x29032dd6"}, {"kind": "Video", "id": "x18a8c853"}, {"kind": "Article", "id": "xb3100f9d"}, {"kind": "Article", "id": "xa78d190a"}, {"kind": "Video", "id": "xefb6edd6"}, {"kind": "Article", "id": "x9d6e18dd"}, {"kind": "Video", "id": "x0079a6e5"}, {"kind": "Video", "id": "xafc8b36e"}, {"kind": "Exercise", "id": "x1ddced3b"}, {"kind": "Scratchpad", "id": "2005175964"}], "children": [{"path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/seeking-signs-of-past-mars-habitability/", "id": "oHLbXTOaw7w", "title": "Seeking signs of habitability", "kind": "Video", "slug": "seeking-signs-of-past-mars-habitability"}, {"path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/gale-crater/", "id": "qrxvbRA2xCI", "title": "Destination: Gale crater", "kind": "Video", "description": "Details on the landing site: Gale Crater", "slug": "gale-crater"}, {"path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/curiosity-s-cameras/", "id": "b2rwWECbEHg", "title": "Rover vision", "kind": "Video", "slug": "curiosity-s-cameras"}, {"path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/chemcam/", "id": "pP-QbnWbg_0", "title": "ChemCam", "kind": "Video", "slug": "chemcam"}, {"path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/robotic-arm-attached/", "id": "e1noAqa_Ukc", "title": "Curiosity's arm", "kind": "Video", "description": "Introduction to the rover's arm", "slug": "robotic-arm-attached"}, {"path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/sam-overview-/", "id": "_jMyz4ZYc-Y", "title": "Introduction to SAM", "kind": "Video", "slug": "sam-overview-"}, {"path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/mars-landing/", "id": "TZ5aMFpwTp8", "title": "Preparing for landing", "kind": "Video", "description": "How hard is it to land on Mars?", "slug": "mars-landing"}, {"path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/seven-minutes-of-terror/", "id": "pzqdoXwLBT8", "title": "Entry, descent & landing", "kind": "Video", "description": "Seven minutes of terror. EDL plans for Curiosity", "slug": "seven-minutes-of-terror"}, {"path": "khan/partner-content/nasa/searchingforlife/mars_science_lab/msl-brief/", "id": "msl-brief", "title": "MSL Brief", "slug": "msl-brief", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Why are we going to Mars today, where are we looking, what are we hoping to find?", "node_slug": "mars_science_lab", "render_type": "Tutorial", "topic_page_url": "/partner-content/nasa/searchingforlife/mars_science_lab", "extended_slug": "partner-content/nasa/searchingforlife/mars_science_lab", "kind": "Topic", "slug": "mars_science_lab"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/", "id": "curiosity-discoveries", "hide": false, "title": "Curiosity rover: discoveries", "child_data": [{"kind": "Video", "id": "xf872ee51"}, {"kind": "Video", "id": "x49a53d1f"}, {"kind": "Video", "id": "x6fbdbdfc"}, {"kind": "Video", "id": "x174bc528"}, {"kind": "Article", "id": "x1271c9bf"}, {"kind": "Article", "id": "x99facf86"}, {"kind": "Video", "id": "x0aa652b4"}, {"kind": "Video", "id": "x1dce2eb8"}, {"kind": "Video", "id": "xe47fb311"}, {"kind": "Video", "id": "xa60b61d2"}, {"kind": "Video", "id": "xbf42de17"}, {"kind": "Video", "id": "x04ae009f"}, {"kind": "Video", "id": "x2e049606"}, {"kind": "Video", "id": "xabef744e"}, {"kind": "Video", "id": "x93a53cdb"}, {"kind": "Video", "id": "x8c6174d8"}, {"kind": "Video", "id": "x438108bd"}, {"kind": "Video", "id": "x17451e27"}, {"kind": "Video", "id": "xaa05c9b7"}], "children": [{"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-has-landed/", "id": "N9hXqzkH7YA", "title": "Curiosity has landed", "kind": "Video", "slug": "curiosity-has-landed"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/mars-curiosity-descent/", "id": "Esj5juUzhpU", "title": "Curiosity descent", "kind": "Video", "slug": "mars-curiosity-descent"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-aug-17-/", "id": "mz2eVthmNn4", "title": "Systems check", "kind": "Video", "description": "Aug 9th 2012)", "slug": "curiosity-rover-report-aug-17-"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-aug-24-2012/", "id": "JhhueOO0iqU", "title": "Curiosity's first drive", "kind": "Video", "description": "(Aug. 24, 2012)", "slug": "curiosity-rover-report-aug-24-2012"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-sept-28-2012/", "id": "HYHc2alzdUk", "title": "Discovery: Streambed", "kind": "Video", "slug": "curiosity-rover-report-sept-28-2012"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/cheminresults/", "id": "L70uKS_4wGM", "title": "First CheMin results", "kind": "Video", "description": "Nov 1st 2012", "slug": "cheminresults"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/roverupdate_dec/", "id": "CgRLm2srV1E", "title": "Preparation for holidays", "kind": "Video", "description": "11 sols of activities are uploaded for the holidays", "slug": "roverupdate_dec"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/roverupdate_dec2/", "id": "z4vB44Rdq48", "title": "Calcium-rich deposits found", "kind": "Video", "description": "First candidate drill site found", "slug": "roverupdate_dec2"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/roverupdate_march/", "id": "65Xr4AdAY2A", "title": "Results of first drilling", "kind": "Video", "description": "Minerals present in the drill sample provided evidence of a previously habitable environment.", "slug": "roverupdate_march"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-april-12-2013-mars-bygone-atmosphere/", "id": "B8OUL9QYNpI", "title": "Mars' bygone atmosphere", "kind": "Video", "description": "NASA's Curiosity finds that the Red Planet doesn't have the same atmosphere it used to.", "slug": "curiosity-rover-report-april-12-2013-mars-bygone-atmosphere"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-may-9-2013-spring-break-over-commanding-resumes/", "id": "ft5gJbqdzfY", "title": "'Spring Break' over: commanding resumes", "kind": "Video", "description": "Curiosity gets new software and new capabilities for the long trek to Mt. Sharp.", "slug": "curiosity-rover-report-may-9-2013-spring-break-over-commanding-resumes"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-june-7-2013-rover-ready-to-switch-gears/", "id": "GH56wMh3FZg", "title": "Rover ready to switch gears", "kind": "Video", "description": "NASA's Curiosity rover switches to long-distance driving mode as she heads to Mount Sharp.", "slug": "curiosity-rover-report-june-7-2013-rover-ready-to-switch-gears"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-july-11-2013/", "id": "vluaivJqo9w", "title": "Trek to mount sharp begins", "kind": "Video", "description": "NASA's Mars rover Curiosity heads on the long journey to the mission's main destination, Mount Sharp.", "slug": "curiosity-rover-report-july-11-2013"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/roverupdate_dec2013/", "id": "X-iqwAt2Qmk", "title": "Dating younger rocks", "kind": "Video", "description": "NASA's Curiosity has determined the age of a Martian rock and provided first readings of radiation on the surface of Mars.", "slug": "roverupdate_dec2013"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-martian-year/", "id": "SSf1HenQhWs", "title": "Curiosity completes its first martian year", "kind": "Video", "description": "On June 24, 2014, NASA's Curiosity rover completes her first Martian year (687 Earth days). Hear team members describe how the mission accomplished its main goal to find a past habitable environment on the Red Planet and the ongoing science studies.", "slug": "curiosity-rover-report-martian-year"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-aug-5-2014/", "id": "g7wX-feyWac", "title": "A softer trek to mount sharp", "kind": "Video", "description": "On the second anniversary of landing, NASA's Curiosity rover on Mars is preparing to navigate through a series of sandy valleys on its way to Mount Sharp. The base of Mount Sharp sits 3 kilometers (1.8 miles) from the rover's current position.", "slug": "curiosity-rover-report-aug-5-2014"}, {"path": "khan/partner-content/nasa/searchingforlife/curiosity-discoveries/curiosity-rover-report-sept-25-2014/", "id": "QWaUCFccvPk", "title": "A taste of mount sharp", "kind": "Video", "description": "NASA's Curiosity Mars rover has collected its first drill sample from the base of Mount Sharp. The scientific allure of the layered mountain inside a crater drew the team to choose this part Mars as its landing site.", "slug": "curiosity-rover-report-sept-25-2014"}], "in_knowledge_map": false, "description": "What did the curiosity rover find? Follow the mission timeline & findings here.", "node_slug": "curiosity-discoveries", "render_type": "Tutorial", "topic_page_url": "/partner-content/nasa/searchingforlife/curiosity-discoveries", "extended_slug": "partner-content/nasa/searchingforlife/curiosity-discoveries", "kind": "Topic", "slug": "curiosity-discoveries"}], "in_knowledge_map": false, "description": "Centuries of observations ignited curiosity about other bodies in our solar system. Eventually, we reached out and touched them...what did we find?", "node_slug": "searchingforlife", "render_type": "Topic", "topic_page_url": "/partner-content/nasa/searchingforlife", "extended_slug": "partner-content/nasa/searchingforlife", "kind": "Topic", "slug": "searchingforlife"}], "in_knowledge_map": false, "description": "NASA's vision is to reach for new heights and reveal the unknown so that what we do and learn will benefit all humankind.\n\nThis section contains a series of tutorials on astronomy and space exploration developed in collaboration with NASA", "node_slug": "nasa", "render_type": "Subject", "topic_page_url": "/partner-content/nasa", "extended_slug": "partner-content/nasa", "kind": "Topic", "slug": "nasa"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/", "id": "big-history-project", "hide": false, "title": "Big History Project", "child_data": [{"kind": "Topic", "id": "x47bc45b2"}, {"kind": "Topic", "id": "xe686c27d"}, {"kind": "Topic", "id": "x6114fb45"}, {"kind": "Topic", "id": "x3aa9f4db"}, {"kind": "Topic", "id": "x49c98871"}, {"kind": "Topic", "id": "xca3e2cda"}, {"kind": "Topic", "id": "x1ec9eb67"}, {"kind": "Topic", "id": "x739200d9"}, {"kind": "Topic", "id": "x9f355a55"}, {"kind": "Topic", "id": "x1f88e232"}], "children": [{"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/what-is-big-history/", "id": "what-is-big-history", "hide": false, "title": "1. What Is Big History?", "child_data": [{"kind": "Topic", "id": "xdfe2a1cb"}, {"kind": "Topic", "id": "xa46994af"}, {"kind": "Topic", "id": "x57bacc4d"}, {"kind": "Topic", "id": "xaa369a76"}, {"kind": "Topic", "id": "x053e4add"}, {"kind": "Topic", "id": "x1659735d"}, {"kind": "Topic", "id": "x691e1487"}, {"kind": "Topic", "id": "x5d404f1e"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/what-is-big-history/welcome-to-big-history/", "id": "welcome-to-big-history", "hide": false, "title": "1.0\u2014Welcome to Big History", "child_data": [{"kind": "Video", "id": "x438bd3ae"}, {"kind": "Article", "id": "xc251504e"}, {"kind": "Video", "id": "x911fcc57"}, {"kind": "Video", "id": "x087dfbb4"}, {"kind": "Article", "id": "x4df077af"}, {"kind": "Exercise", "id": "x03bd0623"}], "children": [{"path": "khan/partner-content/big-history-project/what-is-big-history/welcome-to-big-history/the-big-history/", "id": "oQARhCty-tw", "title": "The Big History", "kind": "Video", "description": "Flip through the story of the Big History Project and get a glimpse of how the course came to be.", "slug": "the-big-history"}, {"path": "khan/partner-content/big-history-project/what-is-big-history/welcome-to-big-history/bhp-big-bang-crashcourse/", "id": "XkD1RPDYWK8", "title": "Crash Course Big History: The Big Bang", "kind": "Video", "description": "Crash Course is a fast, funny, irreverent look at history. In this episode, brothers John and Hank Green gives us their take on what makes Big History so darn important.", "slug": "bhp-big-bang-crashcourse"}, {"path": "khan/partner-content/big-history-project/what-is-big-history/welcome-to-big-history/bhp-10what-is-big-history/", "id": "4VICS9cIugo", "title": "What Is Big History?", "kind": "Video", "description": "We hear David Christian\u2019s explanation of Big History's 13.8-billion-year timeline and multidisciplinary approach.", "slug": "bhp-10what-is-big-history"}, {"path": "khan/partner-content/big-history-project/what-is-big-history/welcome-to-big-history/quiz-welcome-to-the-big-history/", "id": "quiz-welcome-to-the-big-history", "title": "Quiz: Welcome to the Big History", "description": "Quiz 1.0", "slug": "quiz-welcome-to-the-big-history", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Big History is an exciting course that tells the 13.8 billion year history of the Universe from the Big Bang to the present. Before we really dive into the core concepts of Big History, it\u2019s important to get an overview of what Big History is and what you can expect from the course. Ready to challenge your idea of what studying history is all about?", "node_slug": "welcome-to-big-history", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/what-is-big-history/welcome-to-big-history", "extended_slug": "partner-content/big-history-project/what-is-big-history/welcome-to-big-history", "kind": "Topic", "slug": "welcome-to-big-history"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/what-is-big-history/scale/", "id": "scale", "hide": false, "title": "1.1\u2014Scale", "child_data": [{"kind": "Video", "id": "x06877d70"}, {"kind": "Article", "id": "xb96a3642"}, {"kind": "Article", "id": "x7dddd20d"}, {"kind": "Article", "id": "x45ac3d19"}, {"kind": "Exercise", "id": "x534db86e"}], "children": [{"path": "khan/partner-content/big-history-project/what-is-big-history/scale/powers-of-ten/", "id": "0fKBhvDjuy0", "title": "Powers of Ten\u2122 (1977)", "kind": "Video", "description": "Powers of Ten takes us on an adventure in magnitude.", "slug": "powers-of-ten"}, {"path": "khan/partner-content/big-history-project/what-is-big-history/scale/quiz-scale/", "id": "quiz-scale", "title": "Quiz: Scale", "description": "Quiz 1.1", "slug": "quiz-scale", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Scale is incredibly important in understanding Big History. As you already know, this course looks at history at a larger scale than any other history course we\u2019ve seen, and studying time and space over 13.8 billion years poses an interesting challenge. One way of dealing with this challenge is by using different scales so that each topic can be studied from the appropriate perspective. In this lesson, you\u2019ll watch a video on scale, and then take part in an activity that will get you out of your chair. By the time you\u2019ve seen the video and finished the activity, you\u2019ll have a good sense of how scale can affect the way we view things.", "node_slug": "scale", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/what-is-big-history/scale", "extended_slug": "partner-content/big-history-project/what-is-big-history/scale", "kind": "Topic", "slug": "scale"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/partner-content/big-history-project/what-is-big-history/origin-stories/", "id": "origin-stories", "hide": false, "title": "1.2\u2014Origin Stories", "child_data": [{"kind": "Article", "id": "x98426b40"}, {"kind": "Article", "id": "xf398a908"}, {"kind": "Article", "id": "xe0af927d"}, {"kind": "Article", "id": "x6bfad06e"}, {"kind": "Article", "id": "x4407978d"}, {"kind": "Article", "id": "x9c2775d4"}, {"kind": "Article", "id": "xacc492c4"}, {"kind": "Article", "id": "x898e2b4d"}, {"kind": "Exercise", "id": "xc0b8dd92"}], "children": [{"path": "khan/partner-content/big-history-project/what-is-big-history/origin-stories/quiz-1-4-origin-stories/", "id": "quiz-1-4-origin-stories", "title": "Quiz: Origin Stories", "description": "Quiz 1.2", "slug": "quiz-1-4-origin-stories", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Origin stories are the emphasis of this lesson. Big History focuses on the modern, scientific origin story of how the world got to be the way it is. Big History is one origin story, and it\u2019s important to recognize that many different types of origin stories exist. Some are thousands of years old and some are newer. They come from varying cultures and religions, but one theme runs through all of them: It seems that all humans are interested in understanding their origin to some degree.", "node_slug": "origin-stories", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/what-is-big-history/origin-stories", "extended_slug": "partner-content/big-history-project/what-is-big-history/origin-stories", "kind": "Topic", "slug": "origin-stories"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/what-is-big-history/what-are-disciplines/", "id": "what-are-disciplines", "hide": false, "title": "1.3\u2014What Are Disciplines?", "child_data": [{"kind": "Article", "id": "x9e97615c"}, {"kind": "Article", "id": "xa7100fd2"}, {"kind": "Video", "id": "x2f3ee6cf"}, {"kind": "Video", "id": "xc96c39f9"}, {"kind": "Article", "id": "xefb09f5e"}, {"kind": "Exercise", "id": "xb3989af5"}], "children": [{"path": "khan/partner-content/big-history-project/what-is-big-history/what-are-disciplines/bhp-intro-to-cosmology/", "id": "hrhD77JhtOA", "title": "Ways of Knowing \u2013 Introduction to Cosmology", "kind": "Video", "description": "The history of the Universe decorates the night sky. Learn how to watch this history by studying cosmic light emissions.", "slug": "bhp-intro-to-cosmology"}, {"path": "khan/partner-content/big-history-project/what-is-big-history/what-are-disciplines/bhp-intro-to-astrophysics/", "id": "WYlWN_keVkY", "title": "Ways of Knowing \u2013 Introduction to Astrophysics", "kind": "Video", "description": "Do the laws of physics and mathematics apply to everything in the Universe? Janna Levin explains astrophysics.", "slug": "bhp-intro-to-astrophysics"}, {"path": "khan/partner-content/big-history-project/what-is-big-history/what-are-disciplines/quiz-1-5-ways-of-knowing/", "id": "quiz-1-5-ways-of-knowing", "title": "Quiz: What Are Disciplines?", "description": "Quiz 1.3", "slug": "quiz-1-5-ways-of-knowing", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Big History is an interdisciplinary course\u2014in other words, it looks at the history of the Universe and universal change from a number of very distinctive perspectives. Each perspective represents one or more areas of study (we call these disciplines), and each area of study strives to answer a completely different set of questions about ourselves, our planet, and the Universe. No one discipline can know all there is to know about absolutely everything. It would be impossible to think of all the questions to ask, let alone have all the answers. Usually, if we look at any single object or event from the points of view of multiple areas of expertise, we can put together a rich understanding that goes far beyond a one-discipline approach.", "node_slug": "what-are-disciplines", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/what-is-big-history/what-are-disciplines", "extended_slug": "partner-content/big-history-project/what-is-big-history/what-are-disciplines", "kind": "Topic", "slug": "what-are-disciplines"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/what-is-big-history/my-big-history/", "id": "my-big-history", "hide": false, "title": "1.4\u2014My Big History", "child_data": [{"kind": "Article", "id": "x6286e70f"}, {"kind": "Video", "id": "xe8b5103a"}, {"kind": "Article", "id": "x4e595860"}, {"kind": "Article", "id": "xba6e8dc0"}, {"kind": "Exercise", "id": "x333f986d"}], "children": [{"path": "khan/partner-content/big-history-project/what-is-big-history/my-big-history/introduction-to-thresholds-of-increasing-complexity/", "id": "F_BI7rBhfos", "title": "Introduction to Thresholds of Increasing Complexity", "kind": "Video", "description": "Eight dramatic transitions drive Big History's 13.8 billion year story.", "slug": "introduction-to-thresholds-of-increasing-complexity"}, {"path": "khan/partner-content/big-history-project/what-is-big-history/my-big-history/quiz-my-timeline/", "id": "quiz--my-timeline", "title": "Quiz: My Big History", "description": "Quiz 1.4", "slug": "quiz-my-timeline", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In this lesson, you\u2019re going to spend a lot of time thinking about yourself in relation to the Big History narrative. What about your life is like Big History? It may seem like nothing is, but in fact, there are lots of things that have happened in your life that can be compared to the major events in Big History.", "node_slug": "my-big-history", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/what-is-big-history/my-big-history", "extended_slug": "partner-content/big-history-project/what-is-big-history/my-big-history", "kind": "Topic", "slug": "my-big-history"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/big-history-project/what-is-big-history/other-materials1/", "id": "other-materials1", "hide": false, "title": "Other Materials", "child_data": [{"kind": "Video", "id": "xfafbe200"}, {"kind": "Article", "id": "x3e2e7b02"}], "children": [{"path": "khan/partner-content/big-history-project/what-is-big-history/other-materials1/one-student-of-big-history/", "id": "j7WcgW4BpqE", "title": "One Student of Big History", "kind": "Video", "description": "Did you know Bill Gates was a big history student? Here he explains why it's his favorite course of all time.", "slug": "one-student-of-big-history"}], "in_knowledge_map": false, "description": "Access a range of other materials to support learning about this unit.", "node_slug": "other-materials1", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/what-is-big-history/other-materials1", "extended_slug": "partner-content/big-history-project/what-is-big-history/other-materials1", "kind": "Topic", "slug": "other-materials1"}], "in_knowledge_map": false, "description": "Where did everything come from? How did we get to where we are now? Where do humans fit in? Where are things heading? These are questions that origin stories of different cultures have addressed for thousands of years. Big History attempts to answer them by examining the entire past of the Universe using the best available ideas from disciplines such as astronomy, chemistry, biology, and history. Throughout the course, you\u2019ll explore different scales of time and space and view human history from new angles. You\u2019ll learn what we know and what we don\u2019t, consider our place in the Universe, and develop your own ideas for what the future may hold.", "node_slug": "what-is-big-history", "render_type": "Topic", "topic_page_url": "/partner-content/big-history-project/what-is-big-history", "extended_slug": "partner-content/big-history-project/what-is-big-history", "kind": "Topic", "slug": "what-is-big-history"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/big-bang/", "id": "big-bang", "hide": false, "title": "2. The Big Bang", "child_data": [{"kind": "Topic", "id": "x938795a0"}, {"kind": "Topic", "id": "x71f502a6"}, {"kind": "Topic", "id": "x7c5efc82"}, {"kind": "Topic", "id": "xe44e37b8"}, {"kind": "Topic", "id": "x89cf2b9c"}, {"kind": "Topic", "id": "x5571face"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/big-bang/how-did-big-bang-change/", "id": "how-did-big-bang-change", "hide": false, "title": "2.0\u2014How Did Our Understanding of the Universe Change?", "child_data": [{"kind": "Video", "id": "xefc1daf6"}, {"kind": "Article", "id": "x2378eb28"}, {"kind": "Article", "id": "xc34591b7"}, {"kind": "Article", "id": "xc41331ce"}, {"kind": "Article", "id": "x67270064"}, {"kind": "Article", "id": "x4506216e"}, {"kind": "Article", "id": "xaa0e5a81"}, {"kind": "Exercise", "id": "x09cd0d10"}], "children": [{"path": "khan/partner-content/big-history-project/big-bang/how-did-big-bang-change/bhp-view-of-the-universe-change/", "id": "P9lTAUtnreo", "title": "How Did Our View of the Universe Change?", "kind": "Video", "description": "Geocentric to heliocentric, and beyond. An overview of the major changes in the way people have viewed the Universe.", "slug": "bhp-view-of-the-universe-change"}, {"path": "khan/partner-content/big-history-project/big-bang/how-did-big-bang-change/quiz-how-did-our-view-of-the-universe-change-/", "id": "quiz-how-did-our-view-of-the-universe-change-", "title": "Quiz: How Did Our Understanding of the Universe Change?", "description": "Quiz 2.0", "slug": "quiz-how-did-our-view-of-the-universe-change-", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Through the ages, astronomers have used the tools of their time to understand the origin and structure of the Universe. Their views built upon one another, leading to our modern view of the Universe.", "node_slug": "how-did-big-bang-change", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/big-bang/how-did-big-bang-change", "extended_slug": "partner-content/big-history-project/big-bang/how-did-big-bang-change", "kind": "Topic", "slug": "how-did-big-bang-change"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/big-bang/the-big-bang/", "id": "the-big-bang", "hide": false, "title": "2.1\u2014The Big Bang", "child_data": [{"kind": "Article", "id": "x862049f0"}, {"kind": "Video", "id": "x410b2e00"}, {"kind": "Video", "id": "xeb06460f"}, {"kind": "Article", "id": "x11cb5f72"}, {"kind": "Article", "id": "x07a6a35a"}, {"kind": "Video", "id": "x1152a49c"}, {"kind": "Exercise", "id": "xdf8ea698"}], "children": [{"path": "khan/partner-content/big-history-project/big-bang/the-big-bang/bhp-what-emerged-from-the-big-bang/", "id": "CKR854hjydM", "title": "What Emerged from the Big Bang?", "kind": "Video", "description": "David Christian explains how the Big Bang theory developed by looking at the evidence that supports it.", "slug": "bhp-what-emerged-from-the-big-bang"}, {"path": "khan/partner-content/big-history-project/big-bang/the-big-bang/bhp-threshold-1-big-bang/", "id": "f3nJOCfkerI", "title": "Threshold 1: The Big Bang", "kind": "Video", "description": "Space, time, matter, and energy. The Big Bang provided the raw materials for everything around us today.", "slug": "bhp-threshold-1-big-bang"}, {"path": "khan/partner-content/big-history-project/big-bang/the-big-bang/bhp-questions-about-big-bang/", "id": "1Ex5II-jZzw", "title": "Questions About the Big Bang", "kind": "Video", "description": "Janna Levin discusses what we know about the Big Bang, and ponders the profound questions that remain.", "slug": "bhp-questions-about-big-bang"}, {"path": "khan/partner-content/big-history-project/big-bang/the-big-bang/quiz-the-big-bang/", "id": "quiz-the-big-bang", "title": "Quiz: The Big Bang", "description": "Quiz 2.1", "slug": "quiz-the-big-bang", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The Big Bang hasn\u2019t always been the generally accepted explanation of how our Universe came to be. In fact, our views on the origin and structure of the Universe have changed drastically over the last thousand years. As new thinking and evidence have built upon one another, our understanding of the Universe has evolved. Over the ages, astronomers have used the tools of their time to understand the origin and structure of the Universe.", "node_slug": "the-big-bang", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/big-bang/the-big-bang", "extended_slug": "partner-content/big-history-project/big-bang/the-big-bang", "kind": "Topic", "slug": "the-big-bang"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/big-bang/claim-testing/", "id": "claim-testing", "hide": false, "title": "2.2\u2014Claim Testing", "child_data": [{"kind": "Article", "id": "x84a07738"}, {"kind": "Article", "id": "x340d9efa"}, {"kind": "Video", "id": "xa1f7914c"}, {"kind": "Article", "id": "x210581ed"}, {"kind": "Article", "id": "x2773331b"}, {"kind": "Exercise", "id": "x57ce4a63"}], "children": [{"path": "khan/partner-content/big-history-project/big-bang/claim-testing/how-do-we-decide-what-to-believe/", "id": "vkDCkD88-B0", "title": "How Do We Decide What to Believe?", "kind": "Video", "description": "Learn to use \"claim testers\" to evaluate information and decide what you believe!", "slug": "how-do-we-decide-what-to-believe"}, {"path": "khan/partner-content/big-history-project/big-bang/claim-testing/quiz-what-emerged-from-the-big-bang-/", "id": "quiz-what-emerged-from-the-big-bang-", "title": "Quiz: Claim Testing", "description": "Quiz 2.2", "slug": "quiz-what-emerged-from-the-big-bang-", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The focus of this lesson is to begin to understand the process of claim testing. We use the term \"claim testing\" in Big History to mean the process that someone goes through when evaluating the truth of a statement that is made either in Big History or in other research that you might do. In general, when you encounter a claim, it\u2019s important to ask why you should believe and trust in that claim. This is a core idea in Big History, and you should use claim testing on a regular basis throughout the course.", "node_slug": "claim-testing", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/big-bang/claim-testing", "extended_slug": "partner-content/big-history-project/big-bang/claim-testing", "kind": "Topic", "slug": "claim-testing"}], "in_knowledge_map": false, "description": "Big History will introduce you to many new ideas and claims. You won\u2019t simply accept these claims as facts and move on. You\u2019ll be encouraged to test them. You\u2019ll learn how to evaluate information presented to you, and be encouraged to decide for yourself what to believe and what to investigate further. This is how our thinking advances. Today\u2019s scientific view of the history of the Universe is based on the work of thousands of scientists and scholars over thousands of years. People built upon each other\u2019s work. New technology and new observations have led to ever sharper theories about the Universe and its beginnings. As you study how these views have evolved, you\u2019ll develop your own skills for testing the claims of others and making claims of your own.", "node_slug": "big-bang", "render_type": "Topic", "topic_page_url": "/partner-content/big-history-project/big-bang", "extended_slug": "partner-content/big-history-project/big-bang", "kind": "Topic", "slug": "big-bang"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/stars-and-elements/", "id": "stars-and-elements", "hide": false, "title": "3. Stars & Elements", "child_data": [{"kind": "Topic", "id": "xedf15e4e"}, {"kind": "Topic", "id": "x9f64ab32"}, {"kind": "Topic", "id": "xea74209b"}, {"kind": "Topic", "id": "x8849087d"}, {"kind": "Topic", "id": "x88acb033"}, {"kind": "Topic", "id": "x02fb5abf"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/stars-and-elements/how-were-stars-formed/", "id": "how-were-stars-formed", "hide": false, "title": "3.0\u2014How Were Stars Formed?", "child_data": [{"kind": "Article", "id": "x6842f3d4"}, {"kind": "Video", "id": "x7c61e8a5"}, {"kind": "Article", "id": "x12c78efb"}, {"kind": "Article", "id": "xedda965d"}, {"kind": "Video", "id": "x6ad88cfb"}, {"kind": "Article", "id": "xff6738b4"}, {"kind": "Article", "id": "x93afb015"}, {"kind": "Article", "id": "xeb66f470"}, {"kind": "Article", "id": "x677e2a16"}, {"kind": "Exercise", "id": "x735db2e5"}], "children": [{"path": "khan/partner-content/big-history-project/stars-and-elements/how-were-stars-formed/bhp-how-were-stars-formed/", "id": "uxoAJHlgcF4", "title": "How Were Stars Formed?", "kind": "Video", "description": "Explore the Universe before and after the birth of stars and study the extraordinary process of star formation.", "slug": "bhp-how-were-stars-formed"}, {"path": "khan/partner-content/big-history-project/stars-and-elements/how-were-stars-formed/bhp-stars-light-up/", "id": "gEEgicZzwMU", "title": "Threshold 2: Stars Light Up", "kind": "Video", "description": "The early Universe was dark and cold \u2013 until a few atoms of hydrogen and helium got together, and a star was born.", "slug": "bhp-stars-light-up"}, {"path": "khan/partner-content/big-history-project/stars-and-elements/how-were-stars-formed/quiz-how-were-stars-formed-/", "id": "quiz-how-were-stars-formed-", "title": "Quiz: How Were Stars Formed?", "description": "Quiz 3.0", "slug": "quiz-how-were-stars-formed-", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In the years following the Big Bang, hydrogen atoms floated freely around the Universe. These atoms were slightly more packed together in some places than in others. In the more crowded areas, the hydrogen atoms were close enough to each other to let gravity do its work. In these little pockets of hydrogen, stars lit up across our Universe.", "node_slug": "how-were-stars-formed", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/stars-and-elements/how-were-stars-formed", "extended_slug": "partner-content/big-history-project/stars-and-elements/how-were-stars-formed", "kind": "Topic", "slug": "how-were-stars-formed"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/stars-and-elements/creation-complex-elements/", "id": "creation-complex-elements", "hide": false, "title": "3.1\u2014Creation of Complex Elements", "child_data": [{"kind": "Article", "id": "x48adea3d"}, {"kind": "Video", "id": "xcb776228"}, {"kind": "Article", "id": "x1aeae331"}, {"kind": "Video", "id": "x64b43756"}, {"kind": "Video", "id": "x8302edb3"}, {"kind": "Video", "id": "x8a4bcd01"}, {"kind": "Article", "id": "x074c81da"}, {"kind": "Article", "id": "xe9e5bae1"}, {"kind": "Exercise", "id": "xf2bf4493"}], "children": [{"path": "khan/partner-content/big-history-project/stars-and-elements/creation-complex-elements/bhp-new-chemical-elements/", "id": "jWVdmanh8w4", "title": "Threshold 3: New Chemical Elements", "kind": "Video", "description": "Large stars die, and then explode into massive supernovae. This scatters all the elements of the periodic table throughout the Universe, which results in Threshold 3.", "slug": "bhp-new-chemical-elements"}, {"path": "khan/partner-content/big-history-project/stars-and-elements/creation-complex-elements/bhp-what-did-stars-give-us/", "id": "Y9FyokN7WlM", "title": "What Did Stars Give Us?", "kind": "Video", "description": "Aging and dying stars generate extremely hot temperatures, hot enough to create entirely new elements.", "slug": "bhp-what-did-stars-give-us"}, {"path": "khan/partner-content/big-history-project/stars-and-elements/creation-complex-elements/bhp-navigating-periodic-table/", "id": "TEysuDHExc4", "title": "Navigating the Periodic Table", "kind": "Video", "description": "Learn the basic organization of the periodic table and what it tells us about the chemical elements.", "slug": "bhp-navigating-periodic-table"}, {"path": "khan/partner-content/big-history-project/stars-and-elements/creation-complex-elements/bhp-stars-galaxies-crashcourse/", "id": "CYomswUKFuI", "title": "Crash Course Big History: Stars & Galaxies", "kind": "Video", "description": "The guys at CrashCourse explain the process by which stars are formed and explode, in their own unique style.", "slug": "bhp-stars-galaxies-crashcourse"}, {"path": "khan/partner-content/big-history-project/stars-and-elements/creation-complex-elements/quiz-stars-and-big-history/", "id": "quiz-stars-and-big-history", "title": "Quiz: Creation of Complex Elements", "description": "Quiz 3.1", "slug": "quiz-stars-and-big-history", "kind": "Exercise"}], "in_knowledge_map": false, "description": "With the birth of stars, new sources of light and energy emerged all over the Universe. They burned hydrogen to create helium. Helium was used to create carbon. Neon, oxygen, silicon, and iron were also created during the lives of stars. However, once these stars started running out of fuel is when things really got interesting. It\u2019s in the massive explosions that resulted from certain stars running out of fuel that all of the elements of the periodic table were created. Without the death of stars, our world would not exist today.", "node_slug": "creation-complex-elements", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/stars-and-elements/creation-complex-elements", "extended_slug": "partner-content/big-history-project/stars-and-elements/creation-complex-elements", "kind": "Topic", "slug": "creation-complex-elements"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/stars-and-elements/knowing-stars-elements/", "id": "knowing-stars-elements", "hide": false, "title": "3.2\u2014Way of Knowing: Stars and Elements", "child_data": [{"kind": "Video", "id": "x4c287776"}, {"kind": "Video", "id": "x8000504e"}, {"kind": "Article", "id": "x779f6b78"}, {"kind": "Article", "id": "x3d9eb34f"}, {"kind": "Exercise", "id": "x2ce75279"}], "children": [{"path": "khan/partner-content/big-history-project/stars-and-elements/knowing-stars-elements/bhp-intro-to-chemistry/", "id": "91wF7Ef_k8Y", "title": "Intro to Chemistry", "kind": "Video", "description": "Anne McNeil introduces the central science and discusses how the study of matter has changed over time.", "slug": "bhp-intro-to-chemistry"}, {"path": "khan/partner-content/big-history-project/stars-and-elements/knowing-stars-elements/bhp-periodic-table-crashcourse/", "id": "0RRVV4Diomg", "title": "Crash Course Chemistry: Periodic Table of Elements", "kind": "Video", "description": "Hank gives us a tour of the most important table ever, including the life story of the obsessive man who championed it, Dmitri Mendeleev.", "slug": "bhp-periodic-table-crashcourse"}, {"path": "khan/partner-content/big-history-project/stars-and-elements/knowing-stars-elements/quiz-stars-and-elements/", "id": "quiz-stars-and-elements", "title": "Quiz: Stars and Elements", "description": "Quiz 3.3", "slug": "quiz-stars-and-elements", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Aging and dying stars get hotter than\u2026 well, they get hot. Hot enough to create new, heavier elements. What's so special about the heavier elements? Imagine life without metal.", "node_slug": "knowing-stars-elements", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/stars-and-elements/knowing-stars-elements", "extended_slug": "partner-content/big-history-project/stars-and-elements/knowing-stars-elements", "kind": "Topic", "slug": "knowing-stars-elements"}], "in_knowledge_map": false, "description": "By 200 million years after the Big Bang, the Universe had become a very dark and cold place. Then things started to change. First, galaxies and nebulae formed. These were the earliest structures in the Universe. Then stars \u2013 \u201chot spots\u201d of light and energy \u2013 emerged from these clouds of dust and gas. Why did they form and how did they change everything? Stars, the first complex, stable entities in the Universe, have the capacity to generate energy for millions, even billions of years. The first stars, which passed through their entire life cycles relatively quickly, produced many of the chemical elements of the periodic table. In this unit, you\u2019ll learn how stars first formed and how the lives and deaths of stars provided the chemical diversity necessary for even more complex things.", "node_slug": "stars-and-elements", "render_type": "Topic", "topic_page_url": "/partner-content/big-history-project/stars-and-elements", "extended_slug": "partner-content/big-history-project/stars-and-elements", "kind": "Topic", "slug": "stars-and-elements"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/solar-system-and-earth/", "id": "solar-system-and-earth", "hide": false, "title": "4. Our Solar System & Earth", "child_data": [{"kind": "Topic", "id": "x764d33cf"}, {"kind": "Topic", "id": "xc8d18b70"}, {"kind": "Topic", "id": "x52ce5498"}, {"kind": "Topic", "id": "xe084575f"}, {"kind": "Topic", "id": "x1620fdef"}, {"kind": "Topic", "id": "x23bb9c13"}, {"kind": "Topic", "id": "x74b39b6f"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/solar-system-and-earth/earth-and-form-solar-system/", "id": "earth-and-form-solar-system", "hide": false, "title": "4.0\u2014Earth & the Formation of Our Solar System", "child_data": [{"kind": "Article", "id": "x409532eb"}, {"kind": "Video", "id": "x39e7f6a5"}, {"kind": "Article", "id": "x559f5687"}, {"kind": "Video", "id": "x79b63ef5"}, {"kind": "Article", "id": "x2d32f6e8"}, {"kind": "Article", "id": "xa80096dc"}, {"kind": "Article", "id": "xcc5b65be"}, {"kind": "Exercise", "id": "x4dc24b92"}], "children": [{"path": "khan/partner-content/big-history-project/solar-system-and-earth/earth-and-form-solar-system/bhp-threshold4/", "id": "fY0jAVfmcqM", "title": "Threshold 4: Earth & Solar System", "kind": "Video", "description": "Clouds of diverse, chemical matter spun around our Sun, coming together to form our Earth and Solar System.", "slug": "bhp-threshold4"}, {"path": "khan/partner-content/big-history-project/solar-system-and-earth/earth-and-form-solar-system/bhp-how-did-earth-solar-system-form/", "id": "QgVwzm3u3mc", "title": "How Did Earth and the Solar System Form?", "kind": "Video", "description": "New elements enabled new possibilities, creating conditions around stars that were just right for making planets.", "slug": "bhp-how-did-earth-solar-system-form"}, {"path": "khan/partner-content/big-history-project/solar-system-and-earth/earth-and-form-solar-system/quiz-earth-the-formation-of-our-solar-system/", "id": "quiz--earth---the-formation-of-our-solar-system", "title": "Quiz: Earth & the Formation of Our Solar System", "description": "Quiz 4.0", "slug": "quiz-earth-the-formation-of-our-solar-system", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Before 1995, most people believed that the only planets in the Universe were found in our Solar System. Since 1995, hundreds of \u201cexoplanets,\u201d or planets outside of our Solar System, have been discovered orbiting other stars. The Earth and our Solar System are not as unique as they were once thought to be. Planet formation is now considered to be very common in the Universe, and planets can form in the wake of the formation of any star. Star formation begins in giant gas clouds, and probably 99.9 percent of the material in these clouds goes into making the star. Only about 0.1 percent of the material in the original gas cloud is left for planet formation. This leftover material orbits the star and various forces cause the materials to begin crashing into one another. Over time, this process leads to the formation of very large objects\u2014what we know as planets. Sometimes rocky like our Earth, sometimes gassy like Jupiter, these planets gather mass as other floating debris crashes onto their surfaces. In the early days of our Solar System, the Earth was constantly bombarded with floating debris. Over time, things settled down and the Earth cooled, making it the perfect place for life to form.", "node_slug": "earth-and-form-solar-system", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/solar-system-and-earth/earth-and-form-solar-system", "extended_slug": "partner-content/big-history-project/solar-system-and-earth/earth-and-form-solar-system", "kind": "Topic", "slug": "earth-and-form-solar-system"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/solar-system-and-earth/what-young-earth-was-like/", "id": "what-young-earth-was-like", "hide": false, "title": "4.1\u2014What Was Young Earth Like?", "child_data": [{"kind": "Article", "id": "xcbecf57c"}, {"kind": "Video", "id": "xc8f2d24d"}, {"kind": "Video", "id": "x874be2be"}, {"kind": "Article", "id": "x2ebe55e1"}, {"kind": "Article", "id": "x732df6e6"}, {"kind": "Article", "id": "x9b8be8ca"}, {"kind": "Exercise", "id": "x246302a6"}], "children": [{"path": "khan/partner-content/big-history-project/solar-system-and-earth/what-young-earth-was-like/bhp-what-was-young-earth-like/", "id": "6bpoes4E8Vs", "title": "What Was The Young Earth Like?", "kind": "Video", "description": "Travel back in time to the early days of Earth; explore its surface and atmosphere over the ages.", "slug": "bhp-what-was-young-earth-like"}, {"path": "khan/partner-content/big-history-project/solar-system-and-earth/what-young-earth-was-like/bhp-earth-and-early-atmosphere/", "id": "Gyn754vw8ZQ", "title": "Earth and the Early Atmosphere", "kind": "Video", "description": "The Earth's atmosphere keeps changing, creating an endless cycle of warming, cooling, and recovery.", "slug": "bhp-earth-and-early-atmosphere"}, {"path": "khan/partner-content/big-history-project/solar-system-and-earth/what-young-earth-was-like/quiz-what-was-young-earth-like-/", "id": "quiz--what-was-young-earth-like-", "title": "Quiz: What Was Young Earth Like?", "description": "Quiz 4.1", "slug": "quiz-what-was-young-earth-like-", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Scientists estimate that the Earth formed about 4.6 billion years ago. The Earth that we know today, the relatively peaceful home of myriad forms of life, didn\u2019t appear overnight. Rather, it took billions of years to slowly evolve into its current form. The process of accretion that led to the formation of the Earth was a violent one, and it produced an Earth that was only a little less violent and hostile. For a few hundred million years, the early Earth was characterized by high temperatures, toxic gases, high levels of radiation, and ongoing high-impact collisions. Over time, these conditions improved and the Earth took on its distinctive structure with differentiated layers of core, mantle, crust, and atmosphere. This distinctive structure has important consequences: First, it helps explain why the surface of the Earth changes over time; and second, it helps explain why the Earth evolved into a suitable setting for living things.", "node_slug": "what-young-earth-was-like", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/solar-system-and-earth/what-young-earth-was-like", "extended_slug": "partner-content/big-history-project/solar-system-and-earth/what-young-earth-was-like", "kind": "Topic", "slug": "what-young-earth-was-like"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/solar-system-and-earth/plate-tectonics-important/", "id": "plate-tectonics-important", "hide": false, "title": "4.2\u2014Why Is Plate Tectonics Important?", "child_data": [{"kind": "Video", "id": "xd36a84ee"}, {"kind": "Article", "id": "xd852e361"}, {"kind": "Video", "id": "xef319bdb"}, {"kind": "Article", "id": "x0f51e4a8"}, {"kind": "Exercise", "id": "x3399490a"}], "children": [{"path": "khan/partner-content/big-history-project/solar-system-and-earth/plate-tectonics-important/bhp-solar-system-earth-crashcourse/", "id": "yf6YvGb83H4", "title": "Crash Course Big History: The Solar System & the Earth", "kind": "Video", "description": "Emily Graslie joins John and Hank Green to discuss the formation of our Sun, Solar System, and Earth - and how it's all slightly more interesting than leftover crumbs and clam chowder.", "slug": "bhp-solar-system-earth-crashcourse"}, {"path": "khan/partner-content/big-history-project/solar-system-and-earth/plate-tectonics-important/bhp-our-shifting-world/", "id": "mfRafWtmOcU", "title": "Our Shifting Globe", "kind": "Video", "description": "Every volcanic eruption and earthquakes are a reminder that Earth is very much alive and in motion.", "slug": "bhp-our-shifting-world"}, {"path": "khan/partner-content/big-history-project/solar-system-and-earth/plate-tectonics-important/quiz-why-is-plate-tectonics-important-/", "id": "quiz--why-is-plate-tectonics-important-", "title": "Quiz: Why Is Plate Tectonics Important?", "description": "Quiz 4.2", "slug": "quiz-why-is-plate-tectonics-important-", "kind": "Exercise"}], "in_knowledge_map": false, "description": "In the last lesson, you learned that the interior of the Earth changed over time to give the planet the unique layering that it currently possesses. In this lesson, you will learn that the surface of the Earth changes as well. The high temperatures that caused the differentiation of the Earth\u2019s layers continue even today. In a process known as plate tectonics, the heat and movement of the mantle floating under the Earth\u2019s crust drive the movement of the Earth\u2019s crust over its surface. The slow shifting of these tectonic plates explains the shape of our continents as well as mountain ranges and traumatic events like earthquakes.", "node_slug": "plate-tectonics-important", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/solar-system-and-earth/plate-tectonics-important", "extended_slug": "partner-content/big-history-project/solar-system-and-earth/plate-tectonics-important", "kind": "Topic", "slug": "plate-tectonics-important"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/solar-system-and-earth/knowing-solar-system-earth/", "id": "knowing-solar-system-earth", "hide": false, "title": "4.3\u2014Ways of Knowing: Our Solar System and Earth", "child_data": [{"kind": "Video", "id": "x0be0f34e"}, {"kind": "Article", "id": "xd7c8628a"}, {"kind": "Article", "id": "x92cf325c"}, {"kind": "Article", "id": "x1ffdb89f"}, {"kind": "Video", "id": "x2f24f7ef"}, {"kind": "Article", "id": "xb1677f8a"}, {"kind": "Article", "id": "x07d3590d"}, {"kind": "Exercise", "id": "x6c906c30"}], "children": [{"path": "khan/partner-content/big-history-project/solar-system-and-earth/knowing-solar-system-earth/bhp-intro-to-geology/", "id": "rRFphdMIIvI", "title": "Introduction to Geology", "kind": "Video", "description": "Walter Alvarez introduces geology and discusses how the physical features of Earth can tell us about its history.", "slug": "bhp-intro-to-geology"}, {"path": "khan/partner-content/big-history-project/solar-system-and-earth/knowing-solar-system-earth/bhp-intro-geologic-timechart/", "id": "UZ1YE68HszU", "title": "Introduction to the Geologic Time Chart", "kind": "Video", "description": "Earth's 4.6 billion-year history has distinct periods. Geologists use evidence in rock record to classify these.", "slug": "bhp-intro-geologic-timechart"}, {"path": "khan/partner-content/big-history-project/solar-system-and-earth/knowing-solar-system-earth/quiz-our-solar-system-and-earth/", "id": "quiz--our-solar-system-and-earth", "title": "Quiz: Our Solar System and Earth", "description": "Quiz 4.3", "slug": "quiz-our-solar-system-and-earth", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Towering mountains and trembling earthquakes, the surface of our Earth is constantly in motion. Plate tectonics is responsible for the shape and position of our land.", "node_slug": "knowing-solar-system-earth", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/solar-system-and-earth/knowing-solar-system-earth", "extended_slug": "partner-content/big-history-project/solar-system-and-earth/knowing-solar-system-earth", "kind": "Topic", "slug": "knowing-solar-system-earth"}], "in_knowledge_map": false, "description": "Billowing clouds of matter spun around and around our young Sun, gradually forming just about everything in our Solar System \u2013 from meteors and asteroids to all the planets and moons. One planet in particular would enable the creation of even more remarkable complexity.", "node_slug": "solar-system-and-earth", "render_type": "Topic", "topic_page_url": "/partner-content/big-history-project/solar-system-and-earth", "extended_slug": "partner-content/big-history-project/solar-system-and-earth", "kind": "Topic", "slug": "solar-system-and-earth"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/life/", "id": "life", "hide": false, "title": "5. Life", "child_data": [{"kind": "Topic", "id": "xae6d601c"}, {"kind": "Topic", "id": "x5ffd9371"}, {"kind": "Topic", "id": "x650934db"}, {"kind": "Topic", "id": "xa1fc8a98"}, {"kind": "Topic", "id": "xe5dde849"}, {"kind": "Topic", "id": "xe04f550b"}, {"kind": "Topic", "id": "x0dce063a"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/life/life-and-big-history/", "id": "life-and-big-history", "hide": false, "title": "5.0\u2014What Is Life?", "child_data": [{"kind": "Video", "id": "x53bf8136"}, {"kind": "Article", "id": "x590195d3"}, {"kind": "Video", "id": "xe03dd02d"}, {"kind": "Article", "id": "x2dad7562"}, {"kind": "Article", "id": "x09648672"}, {"kind": "Video", "id": "x02338aed"}, {"kind": "Article", "id": "x1c6848e0"}, {"kind": "Article", "id": "x3d992f00"}, {"kind": "Exercise", "id": "x5deb1aa9"}], "children": [{"path": "khan/partner-content/big-history-project/life/life-and-big-history/bhp-threshold-5/", "id": "QTVDRbLX2_o", "title": "Threshold 5: Life on Earth Video", "kind": "Video", "description": "Through a diversity of chemical elements and the perfect conditions on Earth, life mysteriously appeared.", "slug": "bhp-threshold-5"}, {"path": "khan/partner-content/big-history-project/life/life-and-big-history/bhp-whatislife/", "id": "xl6NSugEqh4", "title": "What is Life?", "kind": "Video", "description": "Defining life is harder than it seems. Consider its characteristics and the importance of DNA in evolution.", "slug": "bhp-whatislife"}, {"path": "khan/partner-content/big-history-project/life/life-and-big-history/bhp-origin-of-life_crashcourse/", "id": "og9baLjHRH4", "title": "Crash Course Big History: The Origin of Life", "kind": "Video", "slug": "bhp-origin-of-life_crashcourse"}, {"path": "khan/partner-content/big-history-project/life/life-and-big-history/quiz-/", "id": "quiz-", "title": "Quiz: What Is Life?", "description": "Quiz 5.0", "slug": "quiz-", "kind": "Exercise"}], "in_knowledge_map": false, "description": "With the appearance of the first planets, the Universe became much more complex. Planets, which formed from clouds of chemicals created during the death of stars, are more chemically diverse than the stars from which they came. Planets also differ from stars because they don\u2019t generate huge amounts of energy at their centers. As a result, their surface temperatures are much cooler. This combination of diverse chemical ingredients and less violent conditions enabled planets to become the setting for life. When life emerged on Earth, it had characteristics that made it very different from nonliving things. Many people will tell you they \u201cknow\u201d the difference between living and nonliving things. However, biologists \u2013 the experts \u2013 have struggled to agree on a single definition of life, even though many of the proposed definitions share similarities. In this lesson, we\u2019ll focus on understanding the characteristics all living things share.", "node_slug": "life-and-big-history", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/life/life-and-big-history", "extended_slug": "partner-content/big-history-project/life/life-and-big-history", "kind": "Topic", "slug": "life-and-big-history"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/life/what-is-life/", "id": "what-is-life", "hide": false, "title": "5.1\u2014How Did Life Begin and Change?", "child_data": [{"kind": "Video", "id": "x70e0bf5a"}, {"kind": "Article", "id": "xc4bf40c3"}, {"kind": "Video", "id": "x96edd3e5"}, {"kind": "Video", "id": "xa402203b"}, {"kind": "Article", "id": "x857e024a"}, {"kind": "Video", "id": "x351f5502"}, {"kind": "Exercise", "id": "x3919e100"}], "children": [{"path": "khan/partner-content/big-history-project/life/what-is-life/bhp-how-did-life-begin-and-change/", "id": "oT4F_reQXAU", "title": "How Did Life Begin and Change?", "kind": "Video", "description": "A closer look at the Goldilocks Conditions for life, and an animated voyage through evolution on Earth.", "slug": "bhp-how-did-life-begin-and-change"}, {"path": "khan/partner-content/big-history-project/life/what-is-life/bhp-minithresholds-of-life/", "id": "CAjiDkoZntI", "title": "Mini Thresholds Of Life", "kind": "Video", "description": "Travel through time in a rowboat to consider some of the \"mini-thresholds\" in the development of life on Earth.", "slug": "bhp-minithresholds-of-life"}, {"path": "khan/partner-content/big-history-project/life/what-is-life/bhp-life-in-all-forms/", "id": "mGF7_nqgRpU", "title": "Life In All Its Forms", "kind": "Video", "description": "A closer look at the life on Earth and the techniques scientists use to study living organisms.", "slug": "bhp-life-in-all-forms"}, {"path": "khan/partner-content/big-history-project/life/what-is-life/bhp-evolution-epic-crashcourse/", "id": "rRjGX8ms01o", "title": "Crash Course Big History: The Evolutionary Epic", "kind": "Video", "description": "Poof and you\u2019re gone! Extinction events are no joke. The Greens and Emily Graslie talk about why they are such a big deal, and what they have to do with evolution.", "slug": "bhp-evolution-epic-crashcourse"}, {"path": "khan/partner-content/big-history-project/life/what-is-life/quiz-how-did-life-begin-and-change/", "id": "quiz--how-did-life-begin-and-change", "title": "Quiz: How Did Life Begin and Change", "description": "Quiz 5.1", "slug": "quiz-how-did-life-begin-and-change", "kind": "Exercise"}], "in_knowledge_map": false, "description": "For centuries, scientists have searched for the answer to the question, how did life begin? Some have argued it began in a shallow pool of water. Others have argued that it began deep below the surface of the ocean. Still others believe that a meteor from some distant corner of the Universe brought to the Earth the ingredients for life. How life appeared and how it changed over time are some of the most interesting questions you\u2019ll tackle in this course.", "node_slug": "what-is-life", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/life/what-is-life", "extended_slug": "partner-content/big-history-project/life/what-is-life", "kind": "Topic", "slug": "what-is-life"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/life/how-did-life-begin-change/", "id": "how-did-life-begin-change", "hide": false, "title": "5.2\u2014How Do Earth and Life Interact? ?", "child_data": [{"kind": "Article", "id": "x0b87b652"}, {"kind": "Article", "id": "xcb9c94ad"}, {"kind": "Article", "id": "x4366335b"}, {"kind": "Article", "id": "x7fa4fbdb"}, {"kind": "Article", "id": "x64d68f18"}, {"kind": "Video", "id": "xccedc37d"}, {"kind": "Article", "id": "x2d06f6f8"}, {"kind": "Video", "id": "x9647b3d8"}, {"kind": "Exercise", "id": "xe332dbdc"}], "children": [{"path": "khan/partner-content/big-history-project/life/how-did-life-begin-change/bhp-earth-life-interact/", "id": "rxMF2RYzlto", "title": "How Do Earth and Life Interact?", "kind": "Video", "description": "A look at the \"comfort zone\" humans live in, and the interplay of life and the biosphere.", "slug": "bhp-earth-life-interact"}, {"path": "khan/partner-content/big-history-project/life/how-did-life-begin-change/bhp-proved-asteroid-wiped-out-dinos/", "id": "YRDpPeKc-ZE", "title": "How We Proved An Asteroid Wiped Out The Dinosaurs", "kind": "Video", "description": "Geologist Walter Alvarez gets to the bottom of a scientific murder mystery.", "slug": "bhp-proved-asteroid-wiped-out-dinos"}, {"path": "khan/partner-content/big-history-project/life/how-did-life-begin-change/quiz-how-do-earth-and-life-interact/", "id": "quiz--how-do-earth-and-life-interact", "title": "Quiz: How Do Earth and Life Interact", "description": "Quiz 5.2", "slug": "quiz-how-do-earth-and-life-interact", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The biosphere is an amazing place, serving as home for humans and many other species. The atmosphere provides the air we need to breathe, but the atmosphere also helps to protect us from the Sun\u2019s radiation. The water, plants, and animals of the biosphere provide humans with many of the resources we need for survival. But as amazing the biosphere is in creating a \u201ccomfort zone\u201d for humans, it can also be quite fragile, and from time to time has been subject to significant threats from various astronomical, geological, and biological forces. Changes in these forces can result in both mild and extreme impacts on the biosphere.", "node_slug": "how-did-life-begin-change", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/life/how-did-life-begin-change", "extended_slug": "partner-content/big-history-project/life/how-did-life-begin-change", "kind": "Topic", "slug": "how-did-life-begin-change"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/partner-content/big-history-project/life/knowing-life/", "id": "knowing-life", "hide": false, "title": "5.3\u2014Ways of Knowing: Life", "child_data": [{"kind": "Article", "id": "xca94cb4c"}, {"kind": "Article", "id": "x66b81fb2"}, {"kind": "Article", "id": "x1fdf10e0"}, {"kind": "Article", "id": "x9a1b38bf"}, {"kind": "Article", "id": "xdf271a30"}, {"kind": "Exercise", "id": "x06680f3f"}], "children": [{"path": "khan/partner-content/big-history-project/life/knowing-life/quiz-life/", "id": "quiz--life", "title": "Quiz: Life", "description": "Quiz 5.3", "slug": "quiz-life", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Life first appeared on Earth around 3.8 billion years ago\u2014not long after the Earth itself \u2014and life forms have been changing and diversifying ever since. How is it possible for scientists to know about the history of life? What methods do they use to study life and how it has evolved over time? The methods scientists use to reconstruct the story of living things and how they change over time also change over time. New techniques and instruments are constantly being developed to look more deeply into the world of cells and DNA.", "node_slug": "knowing-life", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/life/knowing-life", "extended_slug": "partner-content/big-history-project/life/knowing-life", "kind": "Topic", "slug": "knowing-life"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/big-history-project/life/other-materials5/", "id": "other-materials5", "hide": false, "title": "Other Materials", "child_data": [{"kind": "Video", "id": "x9042206e"}, {"kind": "Video", "id": "x2b2bdbde"}, {"kind": "Video", "id": "xb4992c17"}, {"kind": "Article", "id": "x1ccb4e58"}, {"kind": "Article", "id": "x731acb35"}, {"kind": "Video", "id": "x6981a1a1"}, {"kind": "Video", "id": "x1acfb965"}, {"kind": "Article", "id": "xc5baa854"}, {"kind": "Article", "id": "xb20886e8"}, {"kind": "Article", "id": "x5359e82b"}], "children": [{"path": "khan/partner-content/big-history-project/life/other-materials5/bhp-intro-to-biology/", "id": "xsxReqs1-4Q", "title": "Introduction to Biology", "kind": "Video", "description": "Ursula Goodenough takes a closer look at biology and the study of life.", "slug": "bhp-intro-to-biology"}, {"path": "khan/partner-content/big-history-project/life/other-materials5/bhp-intro-conservation-science/", "id": "BOHUX-DAdVE", "title": "Introduction to Conservation Science", "kind": "Video", "description": "Sanjayan discusses the field of conservation science and considers the future of the biosphere.", "slug": "bhp-intro-conservation-science"}, {"path": "khan/partner-content/big-history-project/life/other-materials5/bhp-lifes-evolution-story/", "id": "MQfzFjedKeo", "title": "Life's Evolutionary Story", "kind": "Video", "description": "Today's amazing biodiversity all began with a common single-celled ancestor billions of years ago.", "slug": "bhp-lifes-evolution-story"}, {"path": "khan/partner-content/big-history-project/life/other-materials5/bhp-carbon-cycle/", "id": "eQEUHxzLmDE", "title": "The Carbon Cycle", "kind": "Video", "description": "Carbon's ability to form chemical bonds is very important to the history of life on Earth and continues to influence our own future.", "slug": "bhp-carbon-cycle"}, {"path": "khan/partner-content/big-history-project/life/other-materials5/bhp-life-italian-limestone/", "id": "rqubRA14Aww", "title": "Life in Italian Limestone", "kind": "Video", "description": "Walter Alvarez shows how well-preserved limestone layers in the mountains of Italy offer a rare glimpse at Earth history and early forms of life.", "slug": "bhp-life-italian-limestone"}], "in_knowledge_map": false, "description": "Access a range of other materials to support learning about this unit.", "node_slug": "other-materials5", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/life/other-materials5", "extended_slug": "partner-content/big-history-project/life/other-materials5", "kind": "Topic", "slug": "other-materials5"}], "in_knowledge_map": false, "description": "What makes life so special? Is there life elsewhere in the Universe? And how exactly did life emerge and diversify? In many ways these remain mysteries, but we do have enough evidence to explore some possible answers.", "node_slug": "life", "render_type": "Topic", "topic_page_url": "/partner-content/big-history-project/life", "extended_slug": "partner-content/big-history-project/life", "kind": "Topic", "slug": "life"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/early-humans/", "id": "early-humans", "hide": false, "title": "6. Early Humans", "child_data": [{"kind": "Topic", "id": "xb22b7296"}, {"kind": "Topic", "id": "x558b9606"}, {"kind": "Topic", "id": "x26272d17"}, {"kind": "Topic", "id": "xbdd95664"}, {"kind": "Topic", "id": "x2127db8d"}, {"kind": "Topic", "id": "xc7df1322"}, {"kind": "Topic", "id": "x1f115c4f"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/early-humans/how-ancestors-evolved/", "id": "how-ancestors-evolved", "hide": false, "title": "6.0\u2014How Our Ancestors Evolved", "child_data": [{"kind": "Article", "id": "x8654629a"}, {"kind": "Article", "id": "xd65a3545"}, {"kind": "Video", "id": "x58d7d322"}, {"kind": "Video", "id": "xaad379e8"}, {"kind": "Article", "id": "x493d595f"}, {"kind": "Article", "id": "x7561989e"}, {"kind": "Article", "id": "xcefbec10"}, {"kind": "Exercise", "id": "xfa110d1c"}], "children": [{"path": "khan/partner-content/big-history-project/early-humans/how-ancestors-evolved/bhp-threshold6/", "id": "ppIzSaP2jWI", "title": "Threshold 6: Humans and Collective Learning", "kind": "Video", "description": "About 200,000 years ago, man evolved to become the most important force for change on the Earth's surface. What makes us so different from other living things? How did we, together, make something entirely new?", "slug": "bhp-threshold6"}, {"path": "khan/partner-content/big-history-project/early-humans/how-ancestors-evolved/bhp-human-evolution-crashcourse/", "id": "6PZYYIaB0UY", "title": "Crash Course Big History: Human Evolution", "kind": "Video", "description": "No, we really really did not evolve from monkeys. John and Hank Green explain this and lots of other things related to human evolution.", "slug": "bhp-human-evolution-crashcourse"}, {"path": "khan/partner-content/big-history-project/early-humans/how-ancestors-evolved/quiz-how-our-ancestors-evolved/", "id": "quiz--how-our-ancestors-evolved", "title": "Quiz: How Our Ancestors Evolved", "description": "Quiz 6.0", "slug": "quiz-how-our-ancestors-evolved", "kind": "Exercise"}], "in_knowledge_map": false, "description": "How *did* life transform from a single-celled organism to our own species, one that can create, communicate, love, and hate? We\u2019ll explore how bacteria, plants, and animals have transformed over time, leading to the arrival of Homo sapiens (fancy words for humans). We\u2019ll then take a look at how this process of change led to the cultural evolution of humans and the development of our most powerful skill, collective learning.", "node_slug": "how-ancestors-evolved", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/early-humans/how-ancestors-evolved", "extended_slug": "partner-content/big-history-project/early-humans/how-ancestors-evolved", "kind": "Topic", "slug": "how-ancestors-evolved"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/early-humans/ways-of-knowing-early-humans/", "id": "ways-of-knowing-early-humans", "hide": false, "title": "6.1\u2014Ways of Knowing: Early Humans", "child_data": [{"kind": "Video", "id": "x90787a1f"}, {"kind": "Video", "id": "xb43387c4"}, {"kind": "Article", "id": "x18fa2ea4"}, {"kind": "Video", "id": "x61225a24"}, {"kind": "Article", "id": "xc3b0b427"}, {"kind": "Exercise", "id": "xedcb7a23"}], "children": [{"path": "khan/partner-content/big-history-project/early-humans/ways-of-knowing-early-humans/bhp-intro-anthropology/", "id": "D_jevR2FvzE", "title": "Intro to Anthropology", "kind": "Video", "description": "Kathy Schick defines the role of the anthropologist in understanding our past and present.", "slug": "bhp-intro-anthropology"}, {"path": "khan/partner-content/big-history-project/early-humans/ways-of-knowing-early-humans/bhp-intro-archaeology/", "id": "ZVSVHvJRy8U", "title": "Intro to Archaeology", "kind": "Video", "description": "Nicholas Toth explains the tools, methods, and focus of an archaeologist.", "slug": "bhp-intro-archaeology"}, {"path": "khan/partner-content/big-history-project/early-humans/ways-of-knowing-early-humans/bhp-making-stone-tool/", "id": "SrvPOkMs4U4", "title": "Making Stone Tools", "kind": "Video", "description": "Nicholas Toth shows how early humans made stone tools that were simple but effective.", "slug": "bhp-making-stone-tool"}, {"path": "khan/partner-content/big-history-project/early-humans/ways-of-knowing-early-humans/quiz-early-humans/", "id": "quiz--early-humans", "title": "Quiz: Early Humans", "description": "Quiz 6.1", "slug": "quiz-early-humans", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Considering we have never met a Homo habilis or an Australopithecus, how do we know about these early human species? Disciplines such as anthropology, archaeology, primatology, and history give us bits and pieces of evidence to help solve the puzzle of how humans have evolved over time. While we have learned a great deal about this topic in the last hundred years, there are still many unanswered questions and more evidence to be found!", "node_slug": "ways-of-knowing-early-humans", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/early-humans/ways-of-knowing-early-humans", "extended_slug": "partner-content/big-history-project/early-humans/ways-of-knowing-early-humans", "kind": "Topic", "slug": "ways-of-knowing-early-humans"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/early-humans/collective-learning/", "id": "collective-learning", "hide": false, "title": "6.2\u2014Collective Learning", "child_data": [{"kind": "Article", "id": "xb21eddf6"}, {"kind": "Article", "id": "x08a61859"}, {"kind": "Video", "id": "x039b9d61"}, {"kind": "Article", "id": "xa852b130"}, {"kind": "Video", "id": "xbd00d28b"}, {"kind": "Exercise", "id": "x5fcc229f"}], "children": [{"path": "khan/partner-content/big-history-project/early-humans/collective-learning/bhp-collective-learning-at-scale/", "id": "o3Ym-tAtCvc", "title": "Collective Learning at Scale", "kind": "Video", "description": "Learn why humans, more than any other species, have made such a profound impression on the biosphere.", "slug": "bhp-collective-learning-at-scale"}, {"path": "khan/partner-content/big-history-project/early-humans/collective-learning/bhp-early-evidence-collective-learning/", "id": "pFNwgwqSWDo", "title": "Early Evidence of Collective Learning", "kind": "Video", "description": "Stone tools, changes in the human skull, and mutant genes: John Shea discusses some of the early evidence we have for collective learning.", "slug": "bhp-early-evidence-collective-learning"}, {"path": "khan/partner-content/big-history-project/early-humans/collective-learning/quiz-collective-learning/", "id": "quiz--collective-learning", "title": "Quiz: Collective Learning", "description": "Quiz 6.2", "slug": "quiz-collective-learning", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Considering we have never met a Homo habilis or an Australopithecus, how do we know about these early human species? Disciplines such as anthropology, archaeology, primatology, and history give us bits and pieces of evidence to help solve the puzzle of how humans have evolved over time. While we have learned a great deal about this topic in the last hundred years, there are still many unanswered questions and more evidence to be found!", "node_slug": "collective-learning", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/early-humans/collective-learning", "extended_slug": "partner-content/big-history-project/early-humans/collective-learning", "kind": "Topic", "slug": "collective-learning"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/early-humans/how-did-first-humans-live/", "id": "how-did-first-humans-live", "hide": false, "title": "6.3\u2014How Did the First Humans Live?", "child_data": [{"kind": "Video", "id": "x88f59dea"}, {"kind": "Article", "id": "x15c07140"}, {"kind": "Article", "id": "xce9313aa"}, {"kind": "Video", "id": "x79b432de"}, {"kind": "Article", "id": "x5c663a83"}, {"kind": "Video", "id": "xa017457e"}, {"kind": "Article", "id": "x717a1b94"}, {"kind": "Exercise", "id": "x8a814f01"}], "children": [{"path": "khan/partner-content/big-history-project/early-humans/how-did-first-humans-live/bhp-how-did-first-humans-live/", "id": "3XymgBX-R2c", "title": "How Did The First Humans Live?", "kind": "Video", "description": "The evidence left behind by early humans gives us a vivid picture of their lives.", "slug": "bhp-how-did-first-humans-live"}, {"path": "khan/partner-content/big-history-project/early-humans/how-did-first-humans-live/bhp-from-foraging-to-food-shopping/", "id": "TKI1DaquKnI", "title": "From Foraging to Food Shopping", "kind": "Video", "description": "What was it like for hunter-gathers? What were their favorite foods that they would go the extra mile to get their hands on? How are decisions like that different from the decisions we make today?", "slug": "bhp-from-foraging-to-food-shopping"}, {"path": "khan/partner-content/big-history-project/early-humans/how-did-first-humans-live/bhp-genealogy-ancestry/", "id": "zaJVEO44_08", "title": "Genealogy and Human Ancestry", "kind": "Video", "description": "In this video, Henry Louis Gates, Jr., explains how three types of genetic tests helped him understand his own family history, and then goes on to explain how these same tests can help scholars reconstruct the past 60,000 years of human migration.", "slug": "bhp-genealogy-ancestry"}, {"path": "khan/partner-content/big-history-project/early-humans/how-did-first-humans-live/quiz-how-did-the-first-humans-live-/", "id": "quiz--how-did-the-first-humans-live-", "title": "Quiz: How Did the First Humans Live?", "description": "Quiz 6.3", "slug": "quiz-how-did-the-first-humans-live-", "kind": "Exercise"}], "in_knowledge_map": false, "description": "We often teach dogs a few basic tricks, such as how to sit, stay, and fetch. However, have you ever seen dogs teach one another tricks? They might mimic each other\u2019s behavior, but that\u2019s really not the same thing. Humans, on the other hand, can deliberately pass information to each other and teach one another new skills. This makes it much easier for each generation to pick up where the previous one left off, and it\u2019s why we are the only species able to dominate the biosphere. But why have humans evolved into such a powerful species? What makes us special? Here the story continues, as our ancestors evolve from early Homo sapiens to more intelligent beings who are able to learn collectively. Collective learning is the foundation on which modern society is built, and the reason our species continues to build upon what previous generations created.", "node_slug": "how-did-first-humans-live", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/early-humans/how-did-first-humans-live", "extended_slug": "partner-content/big-history-project/early-humans/how-did-first-humans-live", "kind": "Topic", "slug": "how-did-first-humans-live"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/big-history-project/early-humans/other-materials6/", "id": "other-materials6", "hide": false, "title": "Other Materials", "child_data": [{"kind": "Video", "id": "x1c20524c"}, {"kind": "Video", "id": "x37cfdc0c"}, {"kind": "Article", "id": "xe02049bd"}, {"kind": "Video", "id": "xe0b7076c"}, {"kind": "Article", "id": "x02596d49"}], "children": [{"path": "khan/partner-content/big-history-project/early-humans/other-materials6/bhp-how-did-ancestors-evolve/", "id": "_JGdeRfJJ2U", "title": "How Did Our Ancestors Evolve?", "kind": "Video", "description": "All life on earth shares a common ancestor. After the dinosaurs became extinct, biodiversity flourished.", "slug": "bhp-how-did-ancestors-evolve"}, {"path": "khan/partner-content/big-history-project/early-humans/other-materials6/bhp-what-makes-us-different/", "id": "xfFqSnulTR8", "title": "What Makes Humans Different?", "kind": "Video", "description": "Learn why humans, more than any other species, have made such a profound impression on the biosphere.", "slug": "bhp-what-makes-us-different"}, {"path": "khan/partner-content/big-history-project/early-humans/other-materials6/bhp-migrations-technology/", "id": "hleYHNMDnBE", "title": "Migrations and Technological Creativity", "kind": "Video", "description": "Journey with Craig Benjamin through 250,000 years of technological creativity and human migration. Explore how our species has had to adapt, change, and migrate to survive.", "slug": "bhp-migrations-technology"}], "in_knowledge_map": false, "description": "Access a range of other materials to support learning about this unit.", "node_slug": "other-materials6", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/early-humans/other-materials6", "extended_slug": "partner-content/big-history-project/early-humans/other-materials6", "kind": "Topic", "slug": "other-materials6"}], "in_knowledge_map": false, "description": "Humans are unusual. We walk upright and build cities, we travel from continent to continent in hours, and we communicate across the globe in an instant. We alone can build bombs and invent medicines. Why can we do all these things that other creatures can\u2019t? What makes us so different from other species?", "node_slug": "early-humans", "render_type": "Topic", "topic_page_url": "/partner-content/big-history-project/early-humans", "extended_slug": "partner-content/big-history-project/early-humans", "kind": "Topic", "slug": "early-humans"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/agriculture-civilization/", "id": "agriculture-civilization", "hide": false, "title": "7. Agriculture & Civilization", "child_data": [{"kind": "Topic", "id": "x5fa12edc"}, {"kind": "Topic", "id": "xd8a42075"}, {"kind": "Topic", "id": "x9271d484"}, {"kind": "Topic", "id": "xdf4ec945"}, {"kind": "Topic", "id": "x28e25fa6"}, {"kind": "Topic", "id": "x5f6c42fa"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/agriculture-civilization/rise-of-agriculture/", "id": "rise-of-agriculture", "hide": false, "title": "7.0\u2014The Rise of Agriculture", "child_data": [{"kind": "Article", "id": "xce8d714a"}, {"kind": "Video", "id": "xdc7be2eb"}, {"kind": "Article", "id": "x924dbf40"}, {"kind": "Article", "id": "x54a70add"}, {"kind": "Video", "id": "xb5593e9b"}, {"kind": "Article", "id": "x4c1884e3"}, {"kind": "Exercise", "id": "x2d58f858"}], "children": [{"path": "khan/partner-content/big-history-project/agriculture-civilization/rise-of-agriculture/bhp-why-agriculture-was-so-important/", "id": "8n4nne9FQFo", "title": "Threshold 7: Agriculture", "kind": "Video", "description": "When humans began farming, new, more complex ways of living were possible.", "slug": "bhp-why-agriculture-was-so-important"}, {"path": "khan/partner-content/big-history-project/agriculture-civilization/rise-of-agriculture/bhp-why-agriculture-was-important/", "id": "Hx6-m510hjU", "title": "Why Was Agriculture So Important?", "kind": "Video", "description": "The invention of agriculture is not just a matter of tastier food. It unlocked powerful forces that transformed history.", "slug": "bhp-why-agriculture-was-important"}, {"path": "khan/partner-content/big-history-project/agriculture-civilization/rise-of-agriculture/quiz-the-rise-of-agriculture/", "id": "quiz--the-rise-of-agriculture", "title": "Quiz: The Rise of Agriculture", "description": "Quiz 7.0", "slug": "quiz-the-rise-of-agriculture", "kind": "Exercise"}], "in_knowledge_map": false, "description": "All living things need energy to survive. For a long time, humans met their energy needs almost exclusively by eating the food they foraged in their local environment. In other words, humans were completely dependent on the plants and animals that nature provided. The invention of farming about 12,000 years ago gave humans access to vast new food and energy resources, which helped to dramatically transform the way humans lived. Among other things, farming made possible dramatic population growth, and it allowed humans to settle in larger, denser communities than a foraging lifestyle could support. These larger and denser communities eventually led to the development of cities and civilizations, which accelerated collective learning and innovation.", "node_slug": "rise-of-agriculture", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/agriculture-civilization/rise-of-agriculture", "extended_slug": "partner-content/big-history-project/agriculture-civilization/rise-of-agriculture", "kind": "Topic", "slug": "rise-of-agriculture"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/agriculture-civilization/first-cities-states/", "id": "first-cities-states", "hide": false, "title": "7.1\u2014The First Cities and States Appear", "child_data": [{"kind": "Article", "id": "x6bd95111"}, {"kind": "Video", "id": "x56f4c70b"}, {"kind": "Article", "id": "xf1bea04c"}, {"kind": "Article", "id": "x9e5116d7"}, {"kind": "Article", "id": "x66a39c16"}, {"kind": "Article", "id": "x3faac3f8"}, {"kind": "Article", "id": "xccee2209"}, {"kind": "Article", "id": "x78eb9656"}, {"kind": "Article", "id": "x0ede520f"}, {"kind": "Article", "id": "x7f0c0df1"}, {"kind": "Exercise", "id": "xdef637cc"}], "children": [{"path": "khan/partner-content/big-history-project/agriculture-civilization/first-cities-states/bhp-where-when-cities-states/", "id": "ppNmUPTbXtU", "title": "Where and Why Did the First Cities and States Appear?", "kind": "Video", "description": "Fueled by surplus crops, agriculture led to the formation of the world's first large-scale civilizations.", "slug": "bhp-where-when-cities-states"}, {"path": "khan/partner-content/big-history-project/agriculture-civilization/first-cities-states/quiz-the-first-cities-and-states-appear/", "id": "quiz--the-first-cities-and-states-appear", "title": "Quiz: The First Cities and States Appear", "description": "Quiz 7.1", "slug": "quiz-the-first-cities-and-states-appear", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The invention of farming led to dramatic changes in the way humans got their food. By domesticating plants and animals, people could settle in one place. Because domestication gave people more control over the plants and animals in an area, human groups could grow bigger and denser. As these populations grew and turned into cities, states, and empires, greater opportunities for collective learning evolved but so did the types of challenges human communities had to face. Population growth, specialization of labor, and the emergence of rulers and social hierarchies all paved the way for increased collective learning, but they also created some complex problems and relationships that we are still struggling to resolve today.", "node_slug": "first-cities-states", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/agriculture-civilization/first-cities-states", "extended_slug": "partner-content/big-history-project/agriculture-civilization/first-cities-states", "kind": "Topic", "slug": "first-cities-states"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/agriculture-civilization/first-cities-appear/", "id": "first-cities-appear", "hide": false, "title": "7.2\u2014Ways of Knowing: Agriculture and Civilization", "child_data": [{"kind": "Article", "id": "x47ea4ac2"}, {"kind": "Video", "id": "x9ffabe2b"}, {"kind": "Article", "id": "xf8fffddc"}, {"kind": "Article", "id": "x845d78d6"}, {"kind": "Exercise", "id": "x342f9610"}], "children": [{"path": "khan/partner-content/big-history-project/agriculture-civilization/first-cities-appear/bhp-intro-to-history/", "id": "a_bKCdxLkF0", "title": "Intro to History", "kind": "Video", "description": "Historians ask questions about the past to help understand the present, and gain insight to the future.", "slug": "bhp-intro-to-history"}, {"path": "khan/partner-content/big-history-project/agriculture-civilization/first-cities-appear/quiz-agriculture-and-civilization/", "id": "quiz--agriculture-and-civilization", "title": "Quiz: Agriculture and Civilization", "description": "Quiz 7.2", "slug": "quiz-agriculture-and-civilization", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The mysterious pyramids of Ancient Egypt, the Great Wall of China, and the beauty of Machu Picchu (an old Incan city in Peru) are all impressive remnants left behind from some of the world\u2019s ancient agrarian civilizations. But not every civilization has left behind such noticeable clues. In fact, many artifacts from agrarian civilizations fade away with time. But the clues that remain become important windows to the past. Researchers in a variety of disciplines such as history and archaeology use both written record and historical artifacts to pose, analyze, and answer questions about the past. As you will see, written record is of particular importance. Unlike other species, writing gives us the ability to preserve and pass on large amounts of information from one generation to the next. With this ability comes incredible power.", "node_slug": "first-cities-appear", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/agriculture-civilization/first-cities-appear", "extended_slug": "partner-content/big-history-project/agriculture-civilization/first-cities-appear", "kind": "Topic", "slug": "first-cities-appear"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/big-history-project/agriculture-civilization/other-materials7/", "id": "other-materials7", "hide": false, "title": "Other Materials", "child_data": [{"kind": "Video", "id": "xe38d92d2"}, {"kind": "Article", "id": "xc81865f9"}, {"kind": "Article", "id": "xfe4c8731"}], "children": [{"path": "khan/partner-content/big-history-project/agriculture-civilization/other-materials7/bhp-transition-to-agriculture/", "id": "VNwh90eJels", "title": "Transition to Agriculture", "kind": "Video", "description": "Craig Benjamin explains how agriculture drove change and why humans took the risk of abandoning foraging.", "slug": "bhp-transition-to-agriculture"}], "in_knowledge_map": false, "description": "Access a range of other materials to support learning about this unit.", "node_slug": "other-materials7", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/agriculture-civilization/other-materials7", "extended_slug": "partner-content/big-history-project/agriculture-civilization/other-materials7", "kind": "Topic", "slug": "other-materials7"}], "in_knowledge_map": false, "description": "If everyone had to survive as foragers, there wouldn't be nearly enough food to feed 7 billion people. Farming sustains us, and it's easy to assume it has always existed, but it hasn't. Humans invented agriculture. This altered our relationship with the Earth, drove population growth, and enabled the emergence of magnificent civilizations.", "node_slug": "agriculture-civilization", "render_type": "Topic", "topic_page_url": "/partner-content/big-history-project/agriculture-civilization", "extended_slug": "partner-content/big-history-project/agriculture-civilization", "kind": "Topic", "slug": "agriculture-civilization"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/expansion-interconnection/", "id": "expansion-interconnection", "hide": false, "title": "8. Expansion & Interconnection", "child_data": [{"kind": "Topic", "id": "xd3bbaa21"}, {"kind": "Topic", "id": "x10a31089"}, {"kind": "Topic", "id": "xdf29e855"}, {"kind": "Topic", "id": "xa2a79840"}, {"kind": "Topic", "id": "x44333aa3"}, {"kind": "Topic", "id": "x0c50f8c3"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/expansion-interconnection/expansion/", "id": "expansion", "hide": false, "title": "8.0\u2014Expansion", "child_data": [{"kind": "Article", "id": "x62fb77cc"}, {"kind": "Video", "id": "x9f7a356a"}, {"kind": "Video", "id": "xf3429efd"}, {"kind": "Article", "id": "xb5329340"}, {"kind": "Exercise", "id": "x8d64adf5"}], "children": [{"path": "khan/partner-content/big-history-project/expansion-interconnection/expansion/bhp-why-civilizations-expand/", "id": "1QihY-g20QA", "title": "Why Did Civilizations Expand?", "kind": "Video", "description": "Expansion meant the addition of new territories, resources, and people.", "slug": "bhp-why-civilizations-expand"}, {"path": "khan/partner-content/big-history-project/expansion-interconnection/expansion/crash-course-big-history-modernity/", "id": "eYS3-ShEnbs", "title": "Crash Course Big History: Modernity", "kind": "Video", "description": "As civilizations grew larger, demand for resources grew along with it. This led people to spread out over larger territories in search of food, natural resources, and new ideas.", "slug": "crash-course-big-history-modernity"}, {"path": "khan/partner-content/big-history-project/expansion-interconnection/expansion/quiz-expansion-interconnection/", "id": "quiz--expansion---interconnection", "title": "Quiz: Expansion & Interconnection", "description": "Quiz 8.0", "slug": "quiz-expansion-interconnection", "kind": "Exercise"}], "in_knowledge_map": false, "description": "For most of the agrarian era, the world was divided into four separate and distinct world zones. Over time, these zones slowly became more connected as networks of communication and exchange expanded. While innovations did occur throughout this era, such as irrigation, iron plows, and fast-ripening rice, none of these innovations were able to sustain long-term population growth, which limited expansion. Each innovation led to immediate growth, but once populations had grown beyond a certain point, they fell. These cycles of rise and fall in population, called Malthusian cycles, characterized the agrarian era. Humans would not break out of these cycles until the world zones became more connected and rates of innovation were capable of sustaining growth over much longer periods of time.", "node_slug": "expansion", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/expansion-interconnection/expansion", "extended_slug": "partner-content/big-history-project/expansion-interconnection/expansion", "kind": "Topic", "slug": "expansion"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/expansion-interconnection/exploration-interconnection/", "id": "exploration-interconnection", "hide": false, "title": "8.1\u2014Exploration & Interconnection", "child_data": [{"kind": "Article", "id": "xefb442f6"}, {"kind": "Video", "id": "xf8518c38"}, {"kind": "Article", "id": "xd97854aa"}, {"kind": "Article", "id": "x37c8f7e5"}, {"kind": "Article", "id": "xb8b102fb"}, {"kind": "Article", "id": "xe85dd899"}, {"kind": "Article", "id": "xcf4f67aa"}, {"kind": "Article", "id": "x4631d0ab"}, {"kind": "Article", "id": "xdf0e51e3"}, {"kind": "Exercise", "id": "xd95322e6"}], "children": [{"path": "khan/partner-content/big-history-project/expansion-interconnection/exploration-interconnection/bhp-how-world-interconnected/", "id": "cLOQJVv77w8", "title": "How Did the World Become Interconnected?", "kind": "Video", "description": "New trade networks caused an explosion in the trade of goods, but also of ideas, technologies, and diseases.", "slug": "bhp-how-world-interconnected"}, {"path": "khan/partner-content/big-history-project/expansion-interconnection/exploration-interconnection/quiz-exploration-interconnection/", "id": "quiz--exploration---interconnection", "title": "Quiz: Exploration & Interconnection", "description": "Quiz 8.1", "slug": "quiz-exploration-interconnection", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The rise of agriculture ushered in an era of increasing innovation in communication and transportation that led different parts of the world to connect in entirely new ways. The voyages of Christopher Columbus extended this exchange from Afro-Eurasia to the Americas, which saw a massive movement of ideas, people, diseases, plants, and animals between the two hemispheres. The results of these exchanges were dramatic. Potatoes and corn, first cultivated in the Americas, quickly became crucial in the diets of people across Eurasia. Horses and cattle, unknown in the New World in 1492, quickly took on crucial roles in many societies in the Americas. The linking of the different world zones in this period and the exchanges that this linking made possible, transformed the lifeways of the people and civilizations involved \u2013 and laid the foundation for modern exchange routes and the global balance of power.", "node_slug": "exploration-interconnection", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/expansion-interconnection/exploration-interconnection", "extended_slug": "partner-content/big-history-project/expansion-interconnection/exploration-interconnection", "kind": "Topic", "slug": "exploration-interconnection"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/expansion-interconnection/commerce-collective-learning/", "id": "commerce-collective-learning", "hide": false, "title": "8.2\u2014Commerce & Collective Learning", "child_data": [{"kind": "Video", "id": "x364965f2"}, {"kind": "Article", "id": "x9e5eeebb"}, {"kind": "Article", "id": "x07952e58"}, {"kind": "Article", "id": "x25a1cdea"}, {"kind": "Article", "id": "x1c123ac1"}, {"kind": "Exercise", "id": "x27ec4d39"}], "children": [{"path": "khan/partner-content/big-history-project/expansion-interconnection/commerce-collective-learning/bhp-systems-exchange-trade/", "id": "DzVug3LpSHk", "title": "Systems of Exchange and Trade", "kind": "Video", "description": "Wealthy Romans and Chinese silkworms: connections that reshape the world.", "slug": "bhp-systems-exchange-trade"}, {"path": "khan/partner-content/big-history-project/expansion-interconnection/commerce-collective-learning/quiz-commerce-collective-learning/", "id": "quiz--commerce---collective-learning", "title": "Quiz: Commerce & Collective Learning", "description": "Quiz 8.2", "slug": "quiz-commerce-collective-learning", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Evading bandits through mountain passes, leading a caravan of yaks carrying silk and goods, sailing the trade winds off the Indian coastline \u2013 these are a few things you might have done as a trader in the age of agrarian civilizations. Systems of exchange and trade between large agrarian civilizations facilitated the transfer of goods from one civilization to the next, but they also helped share the world\u2019s religions, ideas, innovations, diseases, and people. While each world zone had its own trade routes, none were as vast and intense as the Silk Road. This large system of exchange and trade, initially designed for commerce, dispersed goods and ideas throughout Afro-Eurasia, and paved the way for a substantial increase in both commerce and collective learning.", "node_slug": "commerce-collective-learning", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/expansion-interconnection/commerce-collective-learning", "extended_slug": "partner-content/big-history-project/expansion-interconnection/commerce-collective-learning", "kind": "Topic", "slug": "commerce-collective-learning"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/big-history-project/expansion-interconnection/other-materials8/", "id": "other-materials8", "hide": false, "title": "Other Materials", "child_data": [{"kind": "Article", "id": "xcab5e1a7"}, {"kind": "Article", "id": "x8358bb89"}, {"kind": "Video", "id": "x30870c5d"}, {"kind": "Article", "id": "x126be414"}, {"kind": "Article", "id": "xec6d5524"}, {"kind": "Article", "id": "x411ab3b0"}], "children": [{"path": "khan/partner-content/big-history-project/expansion-interconnection/other-materials8/bhp-recreating-pangaea/", "id": "VZB1P4uNFAw", "title": "Re-Creating Pangaea", "kind": "Video", "description": "When Columbus sailed to the Americas, there was a wave of interconnection that rippled across the world. Unfortunately, this interconnection Included deadly microorganisms.", "slug": "bhp-recreating-pangaea"}], "in_knowledge_map": false, "description": "Access a range of other materials to support learning about this unit.", "node_slug": "other-materials8", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/expansion-interconnection/other-materials8", "extended_slug": "partner-content/big-history-project/expansion-interconnection/other-materials8", "kind": "Topic", "slug": "other-materials8"}], "in_knowledge_map": false, "description": "Early humans had pretty small social networks. At most, they probably met only a couple hundred people who probably all lived very similar lives to their own. As people started farming, these networks got larger. People were increasingly specialized in their work and trade. Populations in cities got larger. Trade reached across longer distances, bringing together people with very different lives and ways of thinking.", "node_slug": "expansion-interconnection", "render_type": "Topic", "topic_page_url": "/partner-content/big-history-project/expansion-interconnection", "extended_slug": "partner-content/big-history-project/expansion-interconnection", "kind": "Topic", "slug": "expansion-interconnection"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/acceleration/", "id": "acceleration", "hide": false, "title": "9. Acceleration", "child_data": [{"kind": "Topic", "id": "x0e47f580"}, {"kind": "Topic", "id": "xc3df923e"}, {"kind": "Topic", "id": "x831309d5"}, {"kind": "Topic", "id": "x2c365823"}, {"kind": "Topic", "id": "xbfaa713e"}, {"kind": "Topic", "id": "x95c63931"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/acceleration/bhp-acceleration/", "id": "bhp-acceleration", "hide": false, "title": "9.0\u2014Acceleration", "child_data": [{"kind": "Article", "id": "x22140677"}, {"kind": "Video", "id": "xfa08bc3b"}, {"kind": "Article", "id": "x5f2e5ad0"}, {"kind": "Video", "id": "x210ef5aa"}, {"kind": "Article", "id": "x5ae4e065"}, {"kind": "Video", "id": "x51be90ce"}, {"kind": "Article", "id": "x26254ca7"}, {"kind": "Exercise", "id": "x8b864b29"}], "children": [{"path": "khan/partner-content/big-history-project/acceleration/bhp-acceleration/bhp-threshold8/", "id": "2EJzrIKtKok", "title": "Threshold 8: The Modern Revolution", "kind": "Video", "description": "The Modern Revolution began about 200 ago and created the world we live in today.", "slug": "bhp-threshold8"}, {"path": "khan/partner-content/big-history-project/acceleration/bhp-acceleration/bhp-industrial-revolution-crashcourse/", "id": "zhL5DCizj5c", "title": "Crash Course World History: The Industrial Revolution", "kind": "Video", "description": "n which John Green wraps up revolutions month with what is arguably the most revolutionary of modern revolutions, the Industrial Revolution.", "slug": "bhp-industrial-revolution-crashcourse"}, {"path": "khan/partner-content/big-history-project/acceleration/bhp-acceleration/bhp-how-did-accelerate/", "id": "VTtlgX27FgI", "title": "How Did Change Accelerate?", "kind": "Video", "description": "Exchange multiplies, markets grow, and fossil fuels flow, revolutionizing government and industry.", "slug": "bhp-how-did-accelerate"}, {"path": "khan/partner-content/big-history-project/acceleration/bhp-acceleration/quiz-acceleration/", "id": "quiz--acceleration", "title": "Quiz: Acceleration", "description": "Quiz 9.0", "slug": "quiz-acceleration", "kind": "Exercise"}], "in_knowledge_map": false, "description": "For most of the agrarian era, the four world zones operated independently of each other with little or no knowledge of what was going on in the other zones. The world, in effect, was divided into four unconnected regions, none of which was really interested in the others. With the improved transportation and communication technologies developed 500 years ago, humans acquired the means for connecting these formerly independent zones. After 1492, for example, the Americas and Afro-Eurasia were put in regular contact, and the Columbian Exchange saw the transfer of people, ideas, animals, plants, and diseases between these two once separate world zones. Exchanges like these fueled social, political, economic, and intellectual innovation. Within a few hundred years, this more fully connected world saw dramatic acceleration in innovation and population growth, which ushered in the Modern Revolution.", "node_slug": "bhp-acceleration", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/acceleration/bhp-acceleration", "extended_slug": "partner-content/big-history-project/acceleration/bhp-acceleration", "kind": "Topic", "slug": "bhp-acceleration"}, {"icon_src": "", "contains": ["Exercise"], "path": "khan/partner-content/big-history-project/acceleration/the-anthropocene/", "id": "the-anthropocene", "hide": false, "title": "9.1\u2014The Anthropocene", "child_data": [{"kind": "Article", "id": "xc4a31cf4"}, {"kind": "Article", "id": "xe1797dd3"}, {"kind": "Article", "id": "xed897659"}, {"kind": "Exercise", "id": "xce9cc473"}], "children": [{"path": "khan/partner-content/big-history-project/acceleration/the-anthropocene/quiz-the-anthropocene/", "id": "quiz--the-anthropocene", "title": "Quiz: The Anthropocene", "description": "Quiz 9.1", "slug": "quiz-the-anthropocene", "kind": "Exercise"}], "in_knowledge_map": false, "description": "For most of the past 10,000 years or so, the biosphere has been a fairly stable and predictable place. Whether you look at temperature, types of vegetation, soils, or sea level, the basic characteristics of the biosphere have remained about the same, having shown only moderate variation at any point within most of that time frame. That type of consistency is what prompted geologists to label the last 10,000 years of geological history as the Holocene Epoch; an epoch that was ushered in at the end of the last ice age. But there are now a number of scientists who view the data from the last 250 years and conclude that the biosphere is showing fundamentally different characteristics from the previous 10,000 years. The rise of carbon dioxide levels, glacial melting, and the shrinking of tropical rainforests are just some of the factors that they cite as evidence that the biosphere has entered a new epoch. Because so much of the change they have identified seems to derive from human activity, these scientists propose that this new epoch be called the Anthropocene to reflect the tremendous impact that humans now exert in the biosphere.", "node_slug": "the-anthropocene", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/acceleration/the-anthropocene", "extended_slug": "partner-content/big-history-project/acceleration/the-anthropocene", "kind": "Topic", "slug": "the-anthropocene"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/acceleration/changing-economies/", "id": "changing-economies", "hide": false, "title": "9.2\u2014Changing Economies", "child_data": [{"kind": "Article", "id": "xe2357932"}, {"kind": "Video", "id": "x6ef778d2"}, {"kind": "Article", "id": "x0c872b01"}, {"kind": "Article", "id": "xbee0973f"}, {"kind": "Exercise", "id": "x8e9af281"}], "children": [{"path": "khan/partner-content/big-history-project/acceleration/changing-economies/bhp-how-modern-world-created/", "id": "obmqVC07vRs", "title": "How Was the Modern World Created?", "kind": "Video", "description": "Three forces of change gather momentum and help create the modern world, transforming the biosphere.", "slug": "bhp-how-modern-world-created"}, {"path": "khan/partner-content/big-history-project/acceleration/changing-economies/quiz-changing-economies/", "id": "quiz--changing-economies", "title": "Quiz: Changing Economies", "description": "Quiz 9.2", "slug": "quiz-changing-economies", "kind": "Exercise"}], "in_knowledge_map": false, "description": "The Modern Revolution created the world we live in today. This world is very different from the world of 500 or 1,000 years ago, let alone 10,000 or 100,000 years ago. The connection of the four world zones allowed for the creation of a global network of exchange. Though this network was not built overnight, it emerged fairly quickly, and it increased the potential connections and diversity of connections for many members of the network. The result was an acceleration of both collective learning and innovation. Commerce was an important driver of change in this global network. Because commerce began to take on greater significance for many societies, a number of important thinkers began to ask questions about the nature of the exchange of goods, the nature of productivity and efficiency, and the interests of the individual and the state in business. All of this new inquiry gave birth to the discipline of economics. These economic thinkers, like the thinkers in any discipline, shared a set of concerns and questions but often came up with very different answers to those questions. The articulation of the ideas of capitalism and communism were the most influential economic ideas generated in the course of the Modern Revolution.", "node_slug": "changing-economies", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/acceleration/changing-economies", "extended_slug": "partner-content/big-history-project/acceleration/changing-economies", "kind": "Topic", "slug": "changing-economies"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/big-history-project/acceleration/other-materials9/", "id": "other-materials9", "hide": false, "title": "Other Materials", "child_data": [{"kind": "Video", "id": "x5a3e8e86"}, {"kind": "Article", "id": "xbd03f057"}, {"kind": "Article", "id": "xb5df46b9"}], "children": [{"path": "khan/partner-content/big-history-project/acceleration/other-materials9/bhp-chemistry-energy/", "id": "AM63tLZZzNo", "title": "Chemistry and Energy", "kind": "Video", "description": "Sustainable energy is one of the greatest challenges for chemists today.", "slug": "bhp-chemistry-energy"}], "in_knowledge_map": false, "description": "Access a range of other materials to support learning about this unit.", "node_slug": "other-materials9", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/acceleration/other-materials9", "extended_slug": "partner-content/big-history-project/acceleration/other-materials9", "kind": "Topic", "slug": "other-materials9"}], "in_knowledge_map": false, "description": "Just 500 years ago, humans lived in four separate world zones, each with distinct cultures and technologies. Now, humanity is linked within one interconnected network of information and commerce that spans the entire planet.", "node_slug": "acceleration", "render_type": "Topic", "topic_page_url": "/partner-content/big-history-project/acceleration", "extended_slug": "partner-content/big-history-project/acceleration", "kind": "Topic", "slug": "acceleration"}, {"icon_src": "", "contains": ["Topic", "Video", "Exercise"], "path": "khan/partner-content/big-history-project/future/", "id": "future", "hide": false, "title": "10. The Future", "child_data": [{"kind": "Topic", "id": "x493f9d7a"}, {"kind": "Topic", "id": "x5d0c82a0"}, {"kind": "Topic", "id": "x6a14c856"}, {"kind": "Topic", "id": "x7d14ba6b"}, {"kind": "Topic", "id": "xaf19e6bd"}, {"kind": "Topic", "id": "x5b3ab4c3"}], "children": [{"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/future/looking-back/", "id": "looking-back", "hide": false, "title": "10.0\u2014Looking Back", "child_data": [{"kind": "Article", "id": "x5a544145"}, {"kind": "Video", "id": "xbe796367"}, {"kind": "Article", "id": "x4773f020"}, {"kind": "Article", "id": "xe9fb628b"}, {"kind": "Exercise", "id": "xc1fffdff"}], "children": [{"path": "khan/partner-content/big-history-project/future/looking-back/the-history-of-everything-ted/", "id": "yqc9zX04DXs", "title": "The History of Everything\u2014TED", "kind": "Video", "description": "David Christian gives a TED talk covering the Universe's 13.8 billion year history in 18 minutes.", "slug": "the-history-of-everything-ted"}, {"path": "khan/partner-content/big-history-project/future/looking-back/quiz-looking-back/", "id": "quiz--looking-back", "title": "Quiz: Looking Back", "description": "Quiz 10.0", "slug": "quiz-looking-back", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Big History tells the story of the Universe from the Big Bang to the present. It would be impossible for any history course to cover everything related to its subject matter, and this challenge is particularly great in Big History because of the scales of time and size involved. Big History deals with this challenge by focusing on the eight turning points, or thresholds, over the course of the 13.8 billion-year story. At each of these thresholds, the Universe became more complex, and things appeared with significant new emergent properties. In this lesson, you\u2019ll review what you\u2019ve learned about this story, which will put you in the perfect position to think about the future of Big History in subsequent lessons in this unit.", "node_slug": "looking-back", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/future/looking-back", "extended_slug": "partner-content/big-history-project/future/looking-back", "kind": "Topic", "slug": "looking-back"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/future/the-biosphere/", "id": "the-biosphere", "hide": false, "title": "10.1\u2014The Biosphere", "child_data": [{"kind": "Article", "id": "xc9d174f0"}, {"kind": "Video", "id": "xe0845baf"}, {"kind": "Video", "id": "x864df09b"}, {"kind": "Article", "id": "xd1bc4191"}, {"kind": "Article", "id": "x0429abd3"}, {"kind": "Exercise", "id": "x958bb609"}], "children": [{"path": "khan/partner-content/big-history-project/future/the-biosphere/bhp-globalization-crashcourse/", "id": "s_iwrt7D5OA", "title": "Crash Course World History: Globalization II \u2013 Good or Bad?", "kind": "Video", "description": "In which John asks whether globalization is a net positive for humanity. While the new global economy has created a lot of wealth, and lifted a lot of people out of poverty, it also has some effects that aren't so hot.", "slug": "bhp-globalization-crashcourse"}, {"path": "khan/partner-content/big-history-project/future/the-biosphere/bhp-atmosphere-climate/", "id": "Jfaipkw691E", "title": "The Atmosphere and Climate", "kind": "Video", "description": "Explore climate change on a geologic time scale, and consider recent human impacts on climate and the atmosphere.", "slug": "bhp-atmosphere-climate"}, {"path": "khan/partner-content/big-history-project/future/the-biosphere/quiz-the-bioshpere/", "id": "quiz--the-bioshpere", "title": "Quiz: Bioshpere", "description": "Quiz 10.1", "slug": "quiz-the-bioshpere", "kind": "Exercise"}], "in_knowledge_map": false, "description": "As you learned in Unit 5, the biosphere is not static. The biosphere changes as a result of astronomical, geological, and biological influences. The dinosaurs, for example, became extinct as a result of an astronomical event\u2014the effects of an asteroid impact on Earth. Every species impacts the biosphere, though the extent of that impact can vary dramatically. The impact of humans has changed over time. The impact of foragers was not dramatic, but these early humans did have the ability to destroy flora and fauna and cause fires in different parts of the Earth. Agriculture, and later the modern revolution, significantly increased the impact of humans on the biosphere. The acceleration of the last 100 years has seen an acceleration of these human impacts on the biosphere. What are the most significant of these impacts and what should humans be doing about them?", "node_slug": "the-biosphere", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/future/the-biosphere", "extended_slug": "partner-content/big-history-project/future/the-biosphere", "kind": "Topic", "slug": "the-biosphere"}, {"icon_src": "", "contains": ["Video", "Exercise"], "path": "khan/partner-content/big-history-project/future/looking-forward/", "id": "looking-forward", "hide": false, "title": "10.2\u2014Looking Forward", "child_data": [{"kind": "Article", "id": "x135e75df"}, {"kind": "Video", "id": "x80ef6c39"}, {"kind": "Article", "id": "xc8341a3c"}, {"kind": "Video", "id": "x79231965"}, {"kind": "Article", "id": "xa2504984"}, {"kind": "Exercise", "id": "x1f4a72bd"}], "children": [{"path": "khan/partner-content/big-history-project/future/looking-forward/bhp-threshold9/", "id": "yHOrayogv1E", "title": "Threshold 9: The Future", "kind": "Video", "description": "Big history is not yet finished. How might the lessons of the past eight thresholds inform our expectations for the future? What role will you play in shaping the next threshold of the big history?", "slug": "bhp-threshold9"}, {"path": "khan/partner-content/big-history-project/future/looking-forward/bhp-visions-of-future/", "id": "oxbSM2IwIBo", "title": "Bill Gates: Visions of the Future", "kind": "Video", "description": "Businessman and philanthropist Bill Gates looks towards a future of sustainable energy and worldwide education.", "slug": "bhp-visions-of-future"}, {"path": "khan/partner-content/big-history-project/future/looking-forward/quiz-looking-forward/", "id": "quiz--looking-forward", "title": "Quiz: Looking Forward", "description": "Quiz 10.2", "slug": "quiz-looking-forward", "kind": "Exercise"}], "in_knowledge_map": false, "description": "Historians typically focus on the past, asking questions like: What happened in the past? Why did it happen? What lessons can be drawn from these events? Studying the past is possible because there is lots of interesting evidence left behind for scholars of many disciplines\u2014not just historians\u2014to look at. Physicists, for example, can look at the abundance of hydrogen and helium in the Universe today and draw conclusions about the early history of the Universe. Geologists can look at the distribution of plants and animals and rock formations on the Earth today and draw conclusions about the how the configuration of the Earth\u2019s continents has changed over time. Each discipline has its own questions and evidence and is interested in investigating change over time. Historians don\u2019t typically predict the future, but given the number of trends you\u2019ve studied in this course, it seems appropriate to give some thought to what the future might be like.", "node_slug": "looking-forward", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/future/looking-forward", "extended_slug": "partner-content/big-history-project/future/looking-forward", "kind": "Topic", "slug": "looking-forward"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/big-history-project/future/other-materials10/", "id": "other-materials10", "hide": false, "title": "Other Materials", "child_data": [{"kind": "Video", "id": "x0891f12d"}, {"kind": "Video", "id": "xf2b0332e"}, {"kind": "Article", "id": "x9484ff5a"}], "children": [{"path": "khan/partner-content/big-history-project/future/other-materials10/bhp-hlg-visions-future/", "id": "un5wOmL3LBQ", "title": "Henry Louis Gates, Jr.: Visions of the Future", "kind": "Video", "description": "How will resources and opportunity be distributed in the future? American Scholar Henry Louis Gates, Jr. hopes that the advances of technology will benefit everyone.", "slug": "bhp-hlg-visions-future"}, {"path": "khan/partner-content/big-history-project/future/other-materials10/bhp-sanjayan-visions-future/", "id": "h5P4hHAYPOI", "title": "Sanjayan: Visions of the Future", "kind": "Video", "description": "What can we learn from volcanic ash in Laetoli? Sanjayan discusses human interaction with the biosphere and how we are reconnecting with nature.", "slug": "bhp-sanjayan-visions-future"}], "in_knowledge_map": false, "description": "Access a range of other materials to support learning about this unit.", "node_slug": "other-materials10", "render_type": "Tutorial", "topic_page_url": "/partner-content/big-history-project/future/other-materials10", "extended_slug": "partner-content/big-history-project/future/other-materials10", "kind": "Topic", "slug": "other-materials10"}], "in_knowledge_map": false, "description": "What does 13.8 billion years of history tell you about yourself? How does knowing so much about the past change the way you think about the future? These may be the most important questions Big History asks. How would you answer them? Big History is an unfinished story.", "node_slug": "future", "render_type": "Topic", "topic_page_url": "/partner-content/big-history-project/future", "extended_slug": "partner-content/big-history-project/future", "kind": "Topic", "slug": "future"}], "in_knowledge_map": false, "description": "Journey through nearly 14 billion years of history with the Big History Project, now available on Khan Academy. This course asks the big questions about our Universe, our planet, life and humanity. Examine our shared history across scales and disciplines. From the Big Bang to our still expanding universe, this course, created and maintained by the Big History Project, will lead you on a journey of astounding connections and exciting discoveries.", "node_slug": "big-history-project", "render_type": "Subject", "topic_page_url": "/partner-content/big-history-project", "extended_slug": "partner-content/big-history-project", "kind": "Topic", "slug": "big-history-project"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/ssf-cci/", "id": "ssf-cci", "hide": false, "title": "Silicon Schools Fund and Clayton Christensen Institute", "child_data": [{"kind": "Topic", "id": "xaec41c35"}, {"kind": "Topic", "id": "x3a3b856f"}, {"kind": "Topic", "id": "xa083f428"}, {"kind": "Topic", "id": "x2ed793c5"}, {"kind": "Topic", "id": "x120a3000"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/", "id": "sscc-intro-blended-learning", "hide": false, "title": "Introduction to blended learning", "child_data": [{"kind": "Topic", "id": "xcec2d965"}, {"kind": "Topic", "id": "x18e393cf"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-overview-blended-learning/", "id": "sscc-overview-blended-learning", "hide": false, "title": "An overview of blended learning", "child_data": [{"kind": "Video", "id": "x1db72e85"}, {"kind": "Video", "id": "xe2f6c736"}, {"kind": "Exercise", "id": "x5985c020"}, {"kind": "Article", "id": "xbcbbc0b3"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-overview-blended-learning/sscc-blended-thecase/", "id": "vKfkOF2sJSg", "title": "The Case for Blended Learning", "kind": "Video", "description": "Learn more about blended learning by exploring tutorials from Silicon Schools Fund and Clayton Christensen Institute here", "slug": "sscc-blended-thecase"}, {"path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-overview-blended-learning/sscc-blended-definition/", "id": "3va4GU-TGGQ", "title": "The Definition of Blended Learning", "kind": "Video", "slug": "sscc-blended-definition"}], "in_knowledge_map": false, "description": "Get an overview of blended learning along with the definition of blended learning and an introduction to several different models of blended learning.", "node_slug": "sscc-overview-blended-learning", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-overview-blended-learning", "extended_slug": "partner-content/ssf-cci/sscc-intro-blended-learning/sscc-overview-blended-learning", "kind": "Topic", "slug": "sscc-overview-blended-learning"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models/", "id": "sscc-blended-learning-models", "hide": false, "title": "Four different blended learning models", "child_data": [{"kind": "Video", "id": "x0c5a31fa"}, {"kind": "Video", "id": "x1e385508"}, {"kind": "Video", "id": "xb7b1faf4"}, {"kind": "Video", "id": "xfb538e61"}, {"kind": "Video", "id": "xee8b4964"}, {"kind": "Exercise", "id": "x71eb0449"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models/sscc-blended-4models/", "id": "BxMCXhVdDVU", "title": "Four Different Blended Learning Models", "kind": "Video", "slug": "sscc-blended-4models"}, {"path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models/sscc-blended-flipped/", "id": "CM3IoLOKP5U", "title": "The Flipped Classroom Model", "kind": "Video", "slug": "sscc-blended-flipped"}, {"path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models/sscc-blended-station/", "id": "QKghZNGL3eM", "title": "The Station Rotation Model", "kind": "Video", "slug": "sscc-blended-station"}, {"path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models/sscc-blended-lab/", "id": "wmp-aV0bPuE", "title": "The Lab Rotation Model", "kind": "Video", "slug": "sscc-blended-lab"}, {"path": "khan/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models/sscc-blended-flex/", "id": "jMRYMRzowCI", "title": "The Flex Model", "kind": "Video", "slug": "sscc-blended-flex"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-blended-learning-models", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models", "extended_slug": "partner-content/ssf-cci/sscc-intro-blended-learning/sscc-blended-learning-models", "kind": "Topic", "slug": "sscc-blended-learning-models"}], "in_knowledge_map": false, "description": "An overview, definition and introduction to several different models of blended learning", "node_slug": "sscc-intro-blended-learning", "render_type": "Topic", "topic_page_url": "/partner-content/ssf-cci/sscc-intro-blended-learning", "extended_slug": "partner-content/ssf-cci/sscc-intro-blended-learning", "kind": "Topic", "slug": "sscc-intro-blended-learning"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/", "id": "ccss-ideal-student-experience", "hide": false, "title": "Creating the ideal student experience in a blended learning classroom", "child_data": [{"kind": "Topic", "id": "xe7a8629f"}, {"kind": "Topic", "id": "x06c753a6"}, {"kind": "Topic", "id": "xd467f61f"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-student-experience-overview/", "id": "sscc-student-experience-overview", "hide": false, "title": "Student experience overview", "child_data": [{"kind": "Video", "id": "xbf553bde"}, {"kind": "Video", "id": "xb36701ef"}, {"kind": "Video", "id": "x965b900a"}], "children": [{"path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-student-experience-overview/sscc-blended-seintro/", "id": "dfO5SWYU6A4", "title": "Introduction & big ideas", "kind": "Video", "slug": "sscc-blended-seintro"}, {"path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-student-experience-overview/sscc-blended-elements/", "id": "cN6TDkZTAI4", "title": "The key elements of the student experience", "kind": "Video", "slug": "sscc-blended-elements"}, {"path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-student-experience-overview/sscc-blended-environment/", "id": "-nve3n7WD0w", "title": "The learning environment in the protagonist schools", "kind": "Video", "slug": "sscc-blended-environment"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-student-experience-overview", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-student-experience-overview", "extended_slug": "partner-content/ssf-cci/ccss-ideal-student-experience/sscc-student-experience-overview", "kind": "Topic", "slug": "sscc-student-experience-overview"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments/", "id": "sscc-learning-environments", "hide": false, "title": "The learning environment in a station rotation, lab rotation and flex model", "child_data": [{"kind": "Video", "id": "x8d3c64da"}, {"kind": "Video", "id": "x3fa91186"}, {"kind": "Video", "id": "x81f27cfd"}, {"kind": "Video", "id": "xe2ce6ce4"}, {"kind": "Article", "id": "x068eb159"}], "children": [{"path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments/sscc-blended-stationkippla/", "id": "yP5PWgbGImo", "title": "Redesigning the school day at KIPP LA using a station rotation model", "kind": "Video", "slug": "sscc-blended-stationkippla"}, {"path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments/sscc-blended-labnav/", "id": "zNlL0M4jWaw", "title": "Redesigning the school day at Navigator Schools using a lab rotation model", "kind": "Video", "slug": "sscc-blended-labnav"}, {"path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments/sscc-blended-flexsummit/", "id": "p5L8JFxKrRM", "title": "Redesigning the school day at Summit Public Schools using a flex model", "kind": "Video", "slug": "sscc-blended-flexsummit"}, {"path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments/sscc-blended-modelchoices/", "id": "juMTnPcfd3A", "title": "How the choices you make in your blended model impact the kind of school you run", "kind": "Video", "slug": "sscc-blended-modelchoices"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-learning-environments", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments", "extended_slug": "partner-content/ssf-cci/ccss-ideal-student-experience/sscc-learning-environments", "kind": "Topic", "slug": "sscc-learning-environments"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-preparing-students/", "id": "sscc-preparing-students", "hide": false, "title": "Preparing students for success", "child_data": [{"kind": "Video", "id": "x5a98e361"}, {"kind": "Video", "id": "xc2986bb3"}, {"kind": "Video", "id": "xba96edca"}], "children": [{"path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-preparing-students/sscc-blended-preparing/", "id": "Y1PXVSDn9HU", "title": "How to prepare students to thrive in a blended learning environment", "kind": "Video", "slug": "sscc-blended-preparing"}, {"path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-preparing-students/sscc-blended-successes/", "id": "GOjMC00-3uQ", "title": "Stories of success from the protagonist schools about their forays into blended learning", "kind": "Video", "slug": "sscc-blended-successes"}, {"path": "khan/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-preparing-students/sscc-blended-noncog/", "id": "u84TMEdR6C4", "title": "How the concepts of \"non-cognitive skills\" play out in a blended-learning setting", "kind": "Video", "slug": "sscc-blended-noncog"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-preparing-students", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/ccss-ideal-student-experience/sscc-preparing-students", "extended_slug": "partner-content/ssf-cci/ccss-ideal-student-experience/sscc-preparing-students", "kind": "Topic", "slug": "sscc-preparing-students"}], "in_knowledge_map": false, "description": "Learn how educators are redesigning schools and the use of time and teachers to create their most ideal blended learning environment. Explore how to help students transition smoothly from traditional education to blended learning", "node_slug": "ccss-ideal-student-experience", "render_type": "Topic", "topic_page_url": "/partner-content/ssf-cci/ccss-ideal-student-experience", "extended_slug": "partner-content/ssf-cci/ccss-ideal-student-experience", "kind": "Topic", "slug": "ccss-ideal-student-experience"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/", "id": "sscc-teaching-blended-learning", "hide": false, "title": "Teaching in a blended learning environment \u2013 rethinking the role of the teacher", "child_data": [{"kind": "Topic", "id": "xe44ca696"}, {"kind": "Topic", "id": "x876e7374"}, {"kind": "Topic", "id": "x2f1a8f5d"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-teacher-experience/", "id": "sscc-teacher-experience", "hide": false, "title": "An overview of the teacher experience", "child_data": [{"kind": "Video", "id": "x5e908b89"}, {"kind": "Video", "id": "xc06a7cd5"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-teacher-experience/sscc-blended-teacherintro/", "id": "_XdW_IVIOQ4", "title": "Teacher role: intro and big ideas", "kind": "Video", "slug": "sscc-blended-teacherintro"}, {"path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-teacher-experience/sscc-blended-roles/", "id": "H9eo5CTB74Q", "title": "Rethinking the role of the teacher and the key shifts a teacher experiences", "kind": "Video", "slug": "sscc-blended-roles"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-teacher-experience", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-teacher-experience", "extended_slug": "partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-teacher-experience", "kind": "Topic", "slug": "sscc-teacher-experience"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies/", "id": "sscc-blended-case-studies", "hide": false, "title": "Case studies: teaching in a blended learning environment", "child_data": [{"kind": "Video", "id": "xc1fe30e6"}, {"kind": "Video", "id": "x2be05800"}, {"kind": "Video", "id": "x6a61121f"}, {"kind": "Video", "id": "xb77312b8"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies/sscc-blended-summitteach/", "id": "qGowzgZCUXc", "title": "Case study #1: Teaching in a Flex model at Summit Public Schools", "kind": "Video", "slug": "sscc-blended-summitteach"}, {"path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies/sscc-blended-kippteach/", "id": "-hFAKd923eI", "title": "Case study #2: Teaching in a Station Rotation model at KIPP LA", "kind": "Video", "slug": "sscc-blended-kippteach"}, {"path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies/sscc-blended-navteach/", "id": "sSWQ1Sx7vw8", "title": "Case study #3: Teaching in Lab Rotation model at Navigator Schools", "kind": "Video", "slug": "sscc-blended-navteach"}, {"path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies/sscc-blended-helpteach/", "id": "wK4QAvtQKiM", "title": "Helping teachers make the change", "kind": "Video", "slug": "sscc-blended-helpteach"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-blended-case-studies", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies", "extended_slug": "partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-case-studies", "kind": "Topic", "slug": "sscc-blended-case-studies"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-learning-motives/", "id": "sscc-blended-learning-motives", "hide": false, "title": "The moves of a blended learning teacher", "child_data": [{"kind": "Video", "id": "xf462ea9e"}, {"kind": "Video", "id": "xf7a5593f"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-learning-motives/sscc-blended-moves1/", "id": "W1caxQHNYuc", "title": "Part 1: Tips from blended-learning teachers about the structures and systems that make blended work", "kind": "Video", "slug": "sscc-blended-moves1"}, {"path": "khan/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-learning-motives/sscc-blended-moves2/", "id": "VBuWGjV-Sis", "title": "Part 2: Tips from blended-learning teachers about the structures and systems that make blended work", "kind": "Video", "slug": "sscc-blended-moves2"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-blended-learning-motives", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-learning-motives", "extended_slug": "partner-content/ssf-cci/sscc-teaching-blended-learning/sscc-blended-learning-motives", "kind": "Topic", "slug": "sscc-blended-learning-motives"}], "in_knowledge_map": false, "description": "Discover how the role of the teacher is changing in blended-learning environments. What parts of the job stay the same and what is different? How does an organization support teachers in making the transition to blended learning?", "node_slug": "sscc-teaching-blended-learning", "render_type": "Topic", "topic_page_url": "/partner-content/ssf-cci/sscc-teaching-blended-learning", "extended_slug": "partner-content/ssf-cci/sscc-teaching-blended-learning", "kind": "Topic", "slug": "sscc-teaching-blended-learning"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/", "id": "sscc-design-blended-learning", "hide": false, "title": "Redesigning a school toward blended learning", "child_data": [{"kind": "Topic", "id": "x859c3539"}, {"kind": "Topic", "id": "xbf3d46de"}, {"kind": "Topic", "id": "x4ce9dbfc"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-school-redesign/", "id": "sscc-school-redesign", "hide": false, "title": "School redesign overview", "child_data": [{"kind": "Video", "id": "x75d69236"}, {"kind": "Video", "id": "x20f94e5d"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-school-redesign/sscc-blended-schoolintro/", "id": "5vJbhxYchPQ", "title": "School redesign - intro and big ideas", "kind": "Video", "slug": "sscc-blended-schoolintro"}, {"path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-school-redesign/sscc-blended-assumptions/", "id": "eRWMxDzxHyc", "title": "The assumptions that limit innovation -- the school year, daily schedule, class size", "kind": "Video", "slug": "sscc-blended-assumptions"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-school-redesign", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-design-blended-learning/sscc-school-redesign", "extended_slug": "partner-content/ssf-cci/sscc-design-blended-learning/sscc-school-redesign", "kind": "Topic", "slug": "sscc-school-redesign"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-challenging-assumptions/", "id": "sscc-challenging-assumptions", "hide": false, "title": "Challenging existing assumptions", "child_data": [{"kind": "Video", "id": "xd8342b92"}, {"kind": "Video", "id": "x0cfa3f47"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-challenging-assumptions/sscc-blended-newstructures/", "id": "1E3KGIr4eOo", "title": "New ways to structure the school day and year in blended-learning settings", "kind": "Video", "slug": "sscc-blended-newstructures"}, {"path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-challenging-assumptions/sscc-blended-newgroups/", "id": "5PmSbASb1yY", "title": "New ways to group students and organize staff", "kind": "Video", "slug": "sscc-blended-newgroups"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-challenging-assumptions", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-design-blended-learning/sscc-challenging-assumptions", "extended_slug": "partner-content/ssf-cci/sscc-design-blended-learning/sscc-challenging-assumptions", "kind": "Topic", "slug": "sscc-challenging-assumptions"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-leading-change/", "id": "sscc-leading-change", "hide": false, "title": "Leading change in blended learning", "child_data": [{"kind": "Video", "id": "xfded97b1"}, {"kind": "Video", "id": "x97cd899b"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-leading-change/sscc-blended-leadingchange/", "id": "ZMitVox1veo", "title": "Leading organizational change to transform existing schools or launch new schools", "kind": "Video", "slug": "sscc-blended-leadingchange"}, {"path": "khan/partner-content/ssf-cci/sscc-design-blended-learning/sscc-leading-change/sscc-blended-innovationprocess/", "id": "amMkXQ1s2ns", "title": "Driving the process of innovation", "kind": "Video", "slug": "sscc-blended-innovationprocess"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-leading-change", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-design-blended-learning/sscc-leading-change", "extended_slug": "partner-content/ssf-cci/sscc-design-blended-learning/sscc-leading-change", "kind": "Topic", "slug": "sscc-leading-change"}], "in_knowledge_map": false, "description": "How can we challenge our assumptions about the ways that schools have always been organized and run? How do leaders manage the change as their organizations transition from traditional models to blended learning?", "node_slug": "sscc-design-blended-learning", "render_type": "Topic", "topic_page_url": "/partner-content/ssf-cci/sscc-design-blended-learning", "extended_slug": "partner-content/ssf-cci/sscc-design-blended-learning", "kind": "Topic", "slug": "sscc-design-blended-learning"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/", "id": "sscc-blended-learning-decisions", "hide": false, "title": "Making aligned hardware, software, and space decisions in a blended learning environment", "child_data": [{"kind": "Topic", "id": "xe91d5cff"}, {"kind": "Topic", "id": "x1fa11ee5"}, {"kind": "Topic", "id": "x423e0a9e"}, {"kind": "Topic", "id": "x137eb40a"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-decisions-overview/", "id": "sscc-decisions-overview", "hide": false, "title": "Hardware, software and facilities decisions overview", "child_data": [{"kind": "Video", "id": "x7bba3342"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-decisions-overview/sscc-blended-hardsoftintro/", "id": "e9cKwLhM0VU", "title": "Hardware, software and space: intro and big ideas", "kind": "Video", "slug": "sscc-blended-hardsoftintro"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-decisions-overview", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-decisions-overview", "extended_slug": "partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-decisions-overview", "kind": "Topic", "slug": "sscc-decisions-overview"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software/", "id": "sscc-blended-software", "hide": false, "title": "Blended learning software", "child_data": [{"kind": "Video", "id": "x86e1cdf7"}, {"kind": "Video", "id": "xc991c631"}, {"kind": "Video", "id": "xe787a7a1"}, {"kind": "Video", "id": "x0feb925a"}, {"kind": "Video", "id": "xb0aff2eb"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software/sscc-blended-typessoftware/", "id": "CYmrwLZD2HI", "title": "The different types of software used in blended learning", "kind": "Video", "slug": "sscc-blended-typessoftware"}, {"path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software/sscc-blended-softwarecriteria/", "id": "e7C2LRIoVTo", "title": "Criteria to pick software", "kind": "Video", "slug": "sscc-blended-softwarecriteria"}, {"path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software/sscc-blended-softwarechallenges/", "id": "JXeji_6wJAA", "title": "The challenges to picking software", "kind": "Video", "slug": "sscc-blended-softwarechallenges"}, {"path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software/sscc-blended-softwareresources/", "id": "WBsyjezwfYc", "title": "Resources to learn about software: the \"consumer reports\" of ed tech", "kind": "Video", "slug": "sscc-blended-softwareresources"}, {"path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software/sscc-blended-buildsoftware/", "id": "Ybw6N0dQIaE", "title": "Building customized software and solutions", "kind": "Video", "slug": "sscc-blended-buildsoftware"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-blended-software", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software", "extended_slug": "partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-software", "kind": "Topic", "slug": "sscc-blended-software"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-hardware/", "id": "sscc-blended-hardware", "hide": false, "title": "Blended learning hardware and infrastructure", "child_data": [{"kind": "Video", "id": "x36acef40"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-hardware/sscc-blended-hardwareinfrastructure/", "id": "PDKPsHuz80k", "title": "Putting the right hardware and infrastructure in place", "kind": "Video", "slug": "sscc-blended-hardwareinfrastructure"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-blended-hardware", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-hardware", "extended_slug": "partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-blended-hardware", "kind": "Topic", "slug": "sscc-blended-hardware"}, {"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-facilities-furniture/", "id": "sscc-facilities-furniture", "hide": false, "title": "Blended learning facilities and furniture", "child_data": [{"kind": "Video", "id": "x456ed2de"}], "children": [{"path": "khan/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-facilities-furniture/sscc-blended-facilities/", "id": "I-Ha9At0zIo", "title": "Making sure the facilities and furniture support your educational model", "kind": "Video", "slug": "sscc-blended-facilities"}], "in_knowledge_map": false, "description": "", "node_slug": "sscc-facilities-furniture", "render_type": "Tutorial", "topic_page_url": "/partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-facilities-furniture", "extended_slug": "partner-content/ssf-cci/sscc-blended-learning-decisions/sscc-facilities-furniture", "kind": "Topic", "slug": "sscc-facilities-furniture"}], "in_knowledge_map": false, "description": "Explore the choices you have to make around your software, hardware, and facilities and how to make sure they support your educational model", "node_slug": "sscc-blended-learning-decisions", "render_type": "Topic", "topic_page_url": "/partner-content/ssf-cci/sscc-blended-learning-decisions", "extended_slug": "partner-content/ssf-cci/sscc-blended-learning-decisions", "kind": "Topic", "slug": "sscc-blended-learning-decisions"}], "in_knowledge_map": false, "description": "Silicon Schools Fund and the Clayton Christensen Institute have teamed up to provide insight and guidance on delivering high-quality blended learning. Learn more about how to personalize K-12 education for all students by combining the best of traditional schools with the transformative power of online learning.", "node_slug": "ssf-cci", "render_type": "Subject", "topic_page_url": "/partner-content/ssf-cci", "extended_slug": "partner-content/ssf-cci", "kind": "Topic", "slug": "ssf-cci"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/partner-content/dartmouth-college/", "id": "dartmouth-college", "hide": false, "title": "Dartmouth College", "child_data": [{"kind": "Topic", "id": "x16765be3"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/partner-content/dartmouth-college/dartmouth-algorithms/", "id": "dartmouth-algorithms", "hide": false, "title": "Learn Algorithms with Dartmouth College", "child_data": [{"kind": "Video", "id": "x0d0c2a5b"}, {"kind": "Article", "id": "x063eb1ad"}], "children": [{"path": "khan/partner-content/dartmouth-college/dartmouth-algorithms/what-are-algorithms/", "id": "CvSOaYi89B4", "title": "What is an algorithm and why should you care?", "kind": "Video", "slug": "what-are-algorithms"}], "in_knowledge_map": false, "description": "In this collaboration with Dartmouth college professors Tom Cormen and Devin Balkcom, Khan Academy is offering an introduction to computer science algorithms, including searching, sorting, recursion, and graph theory.", "node_slug": "dartmouth-algorithms", "render_type": "Tutorial", "topic_page_url": "/partner-content/dartmouth-college/dartmouth-algorithms", "extended_slug": "partner-content/dartmouth-college/dartmouth-algorithms", "kind": "Topic", "slug": "dartmouth-algorithms"}], "in_knowledge_map": false, "description": "Founded in 1769, Dartmouth is a member of the Ivy League and consistently ranks among the world's greatest academic institutions. Dartmouth has forged a singular identity for combining its deep commitment to outstanding undergraduate liberal arts and graduate education with distinguished research and scholarship in the Arts & Sciences and its three leading professional schools\u2014the Geisel School of Medicine, Thayer School of Engineering, and the Tuck School of Business.", "node_slug": "dartmouth-college", "render_type": "Subject", "topic_page_url": "/partner-content/dartmouth-college", "extended_slug": "partner-content/dartmouth-college", "kind": "Topic", "slug": "dartmouth-college"}], "in_knowledge_map": false, "description": "", "node_slug": "partner-content", "render_type": "Domain", "topic_page_url": null, "extended_slug": "partner-content", "kind": "Topic", "slug": "partner-content"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/college-admissions/", "id": "college-admissions", "hide": false, "title": "College admissions", "child_data": [{"kind": "Topic", "id": "x470cb2e4"}, {"kind": "Topic", "id": "x9f996caa"}, {"kind": "Topic", "id": "x53b1e407"}, {"kind": "Topic", "id": "xfcbf76a2"}, {"kind": "Topic", "id": "xf0a5ba61"}, {"kind": "Topic", "id": "x40faa483"}], "children": [{"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/college-admissions/get-started/", "id": "get-started", "hide": false, "title": "Getting started", "child_data": [{"kind": "Topic", "id": "xc862ed6d"}, {"kind": "Topic", "id": "xdeb71287"}, {"kind": "Topic", "id": "x2cf68392"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/get-started/introduction-ca/", "id": "Introduction-ca", "hide": false, "title": "Introduction: College admissions", "child_data": [{"kind": "Video", "id": "xa181f48c"}, {"kind": "Article", "id": "x9678595d"}], "children": [{"path": "khan/college-admissions/get-started/introduction-ca/sal-khans-story-college-admissions/", "id": "cGg1j1ZCCOs", "title": "Sal Khan's story: College admissions", "kind": "Video", "slug": "sal-khans-story-college-admissions"}], "in_knowledge_map": false, "description": "Hear Sal's college admissions story and then start planning your own with a 4-year college admissions timeline.", "node_slug": "Introduction-ca", "render_type": "Tutorial", "topic_page_url": "/college-admissions/get-started/Introduction-ca", "extended_slug": "college-admissions/get-started/Introduction-ca", "kind": "Topic", "slug": "introduction-ca"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/get-started/importance-of-college/", "id": "importance-of-college", "hide": false, "title": "Importance of college", "child_data": [{"kind": "Video", "id": "xd914339e"}, {"kind": "Video", "id": "x83ac3855"}, {"kind": "Video", "id": "x14fca8fa"}, {"kind": "Video", "id": "xeb3ec642"}, {"kind": "Video", "id": "xc1daf98b"}, {"kind": "Article", "id": "xb31b541e"}], "children": [{"path": "khan/college-admissions/get-started/importance-of-college/college-experience/", "id": "0UrcjBLz6B0", "title": "The college experience", "kind": "Video", "slug": "college-experience"}, {"path": "khan/college-admissions/get-started/importance-of-college/ss-college-increases-confidence/", "id": "tUdc4bD2OZU", "title": "Student story: College increases confidence", "kind": "Video", "slug": "ss-college-increases-confidence"}, {"path": "khan/college-admissions/get-started/importance-of-college/ss-college-expands-opportunities/", "id": "TEjZlQUuxvc", "title": "Student story: College expands opportunities", "kind": "Video", "slug": "ss-college-expands-opportunities"}, {"path": "khan/college-admissions/get-started/importance-of-college/ss-college-offers-exposure-to-diversity/", "id": "bYgL6ovZE64", "title": "Student story: College offers exposure to diversity", "kind": "Video", "slug": "ss-college-offers-exposure-to-diversity"}, {"path": "khan/college-admissions/get-started/importance-of-college/ss-college-brings-new-friends-learning-and-freedom/", "id": "P4s0bnrRm4M", "title": "Student story: College brings new friends, learning, and freedom", "kind": "Video", "slug": "ss-college-brings-new-friends-learning-and-freedom"}], "in_knowledge_map": false, "description": "Find out just how much college can impact your life, both during your time in school and after graduation.", "node_slug": "importance-of-college", "render_type": "Tutorial", "topic_page_url": "/college-admissions/get-started/importance-of-college", "extended_slug": "college-admissions/get-started/importance-of-college", "kind": "Topic", "slug": "importance-of-college"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/get-started/access-to-college/", "id": "access-to-college", "hide": false, "title": "Access to college", "child_data": [{"kind": "Video", "id": "xd733e24d"}, {"kind": "Video", "id": "x61be0286"}, {"kind": "Video", "id": "x24b1d081"}, {"kind": "Video", "id": "xfa0f5f54"}, {"kind": "Video", "id": "x309a2986"}, {"kind": "Video", "id": "x81b890f7"}, {"kind": "Video", "id": "xd5fdf03e"}, {"kind": "Video", "id": "xe91b2f6b"}, {"kind": "Video", "id": "xfdf3f751"}, {"kind": "Video", "id": "x69b8f646"}, {"kind": "Article", "id": "x6a7dfe1a"}], "children": [{"path": "khan/college-admissions/get-started/access-to-college/who-can-succeed-in-college/", "id": "JNxXz3cQoNo", "title": "Who can succeed in college?", "kind": "Video", "slug": "who-can-succeed-in-college"}, {"path": "khan/college-admissions/get-started/access-to-college/ss-cultural-obstacles/", "id": "f2ExnG0mGxg", "title": "Student story: Overcoming cultural obstacles to college", "kind": "Video", "slug": "ss-cultural-obstacles"}, {"path": "khan/college-admissions/get-started/access-to-college/ss-anxiety-around-fitting-in-obstacle/", "id": "SJOMrRHGcNY", "title": "Student story: Overcoming anxiety around not fitting in as an obstacle to college", "kind": "Video", "slug": "ss-anxiety-around-fitting-in-obstacle"}, {"path": "khan/college-admissions/get-started/access-to-college/ss-time-management-obstacles/", "id": "YTuh7BmTNQc", "title": "Student story: Overcoming time management obstacles to college", "kind": "Video", "slug": "ss-time-management-obstacles"}, {"path": "khan/college-admissions/get-started/access-to-college/ss-social-obstacles/", "id": "GAhZuUYkGyo", "title": "Student story: Overcoming social obstacles to college", "kind": "Video", "slug": "ss-social-obstacles"}, {"path": "khan/college-admissions/get-started/access-to-college/ss-lack-of-high-school-support-obstacle/", "id": "vhY3zQ6h49o", "title": "Student story: Overcoming lack of high school support as an obstacle to college", "kind": "Video", "slug": "ss-lack-of-high-school-support-obstacle"}, {"path": "khan/college-admissions/get-started/access-to-college/ss-immigration-obstacles/", "id": "cbz01PPQ5ow", "title": "Student story: Overcoming immigration obstacles to college", "kind": "Video", "slug": "ss-immigration-obstacles"}, {"path": "khan/college-admissions/get-started/access-to-college/ss-financial-obstacles/", "id": "rBZ63imCC84", "title": "Student story: Overcoming financial obstacles to college", "kind": "Video", "description": "Learn More About QuestBridge", "slug": "ss-financial-obstacles"}, {"path": "khan/college-admissions/get-started/access-to-college/ss-financial-aid-process-obstacle/", "id": "W-R8nn5GQ8U", "title": "Student story: Overcoming the financial aid process as an obstacle to college", "kind": "Video", "slug": "ss-financial-aid-process-obstacle"}, {"path": "khan/college-admissions/get-started/access-to-college/ss-family-obstacles/", "id": "7Wd3N8hFfDk", "title": "Student story: Overcoming family obstacles to college", "kind": "Video", "slug": "ss-family-obstacles"}], "in_knowledge_map": false, "description": "Throw out your preconceived notions about who can go to college as admissions officers and students discuss the wide-variety of pathways to higher education.", "node_slug": "access-to-college", "render_type": "Tutorial", "topic_page_url": "/college-admissions/get-started/access-to-college", "extended_slug": "college-admissions/get-started/access-to-college", "kind": "Topic", "slug": "access-to-college"}], "in_knowledge_map": false, "description": "Thinking about a 4-year college but not sure whether it's right for you? This is the place to start! Learn more about what happens during college, why it matters for your future, and the wide range of students who have chosen to attend.", "node_slug": "get-started", "render_type": "Topic", "topic_page_url": "/college-admissions/get-started", "extended_slug": "college-admissions/get-started", "kind": "Topic", "slug": "get-started"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/college-admissions/making-high-school-count/", "id": "making-high-school-count", "hide": false, "title": "Making high school count", "child_data": [{"kind": "Topic", "id": "x5f671432"}, {"kind": "Topic", "id": "xf0955cb8"}, {"kind": "Topic", "id": "xa63a9681"}, {"kind": "Topic", "id": "xd0b7c8d3"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/making-high-school-count/introduction-mhsc/", "id": "introduction-mhsc", "hide": false, "title": "Introduction: Making high school count", "child_data": [{"kind": "Video", "id": "x2a4eb13a"}, {"kind": "Video", "id": "xbc0fd17b"}, {"kind": "Article", "id": "x5e7c08fa"}], "children": [{"path": "khan/college-admissions/making-high-school-count/introduction-mhsc/sal-khans-story-making-high-school-count/", "id": "fDChjr0hvCw", "title": "Sal Khan's story: Making high school count", "kind": "Video", "slug": "sal-khans-story-making-high-school-count"}, {"path": "khan/college-admissions/making-high-school-count/introduction-mhsc/overview-making-high-school-count/", "id": "xNOZ5yjIw-c", "title": "Overview: Making high school count", "kind": "Video", "slug": "overview-making-high-school-count"}], "in_knowledge_map": false, "description": "Hear from Sal and admissions officers on what it takes to make the most of high school. Then, begin planning your own high school-to-college story with a timeline for making high school count.", "node_slug": "introduction-mhsc", "render_type": "Tutorial", "topic_page_url": "/college-admissions/making-high-school-count/introduction-mhsc", "extended_slug": "college-admissions/making-high-school-count/introduction-mhsc", "kind": "Topic", "slug": "introduction-mhsc"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/making-high-school-count/high-school-classes/", "id": "high-school-classes", "hide": false, "title": "High school classes", "child_data": [{"kind": "Video", "id": "x05a42725"}, {"kind": "Article", "id": "xae29c60a"}, {"kind": "Video", "id": "x5a464c9e"}], "children": [{"path": "khan/college-admissions/making-high-school-count/high-school-classes/making-the-most-of-high-school-classes/", "id": "PIdgHAOoIKs", "title": "Making the most of high school classes", "kind": "Video", "slug": "making-the-most-of-high-school-classes"}, {"path": "khan/college-admissions/making-high-school-count/high-school-classes/ss-high-school-classes/", "id": "6PjBb-r54A8", "title": "Student story: High school classes", "kind": "Video", "slug": "ss-high-school-classes"}], "in_knowledge_map": false, "description": "Take the challenging class or get the good grade? Learn more about what admissions looks for on your high school transcript and how current college students navigated the process when in high school.", "node_slug": "high-school-classes", "render_type": "Tutorial", "topic_page_url": "/college-admissions/making-high-school-count/high-school-classes", "extended_slug": "college-admissions/making-high-school-count/high-school-classes", "kind": "Topic", "slug": "high-school-classes"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/", "id": "extracurricular-and-leadership", "hide": false, "title": "Extracurricular and leadership activities", "child_data": [{"kind": "Video", "id": "x763ddb56"}, {"kind": "Video", "id": "xafb0f989"}, {"kind": "Video", "id": "xd46f4a06"}, {"kind": "Video", "id": "x19428a6b"}, {"kind": "Video", "id": "x66144952"}, {"kind": "Video", "id": "x3349dc41"}], "children": [{"path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/engaging-in-extracurricular-activities/", "id": "MVHy_hbKSa4", "title": "Engaging in extracurricular activities", "kind": "Video", "slug": "engaging-in-extracurricular-activities"}, {"path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/ss-extracurriculars-that-are-leadership-opportunities/", "id": "Z30Kkrye47Y", "title": "Student story: Extracurriculars that are leadership opportunities", "kind": "Video", "slug": "ss-extracurriculars-that-are-leadership-opportunities"}, {"path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/ss-extracurriculars-that-are-nontraditional/", "id": "Mdk2HeiDUqQ", "title": "Student story: Extracurriculars that are nontraditional", "kind": "Video", "slug": "ss-extracurriculars-that-are-nontraditional"}, {"path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/ss-extracurriculars-that-are-self-created/", "id": "aTX7DcwQE-k", "title": "Student story: Extracurriculars that are self created", "kind": "Video", "slug": "ss-extracurriculars-that-are-self-created"}, {"path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/ss-extracurriculars-that-are-a-passion/", "id": "qEdevRBLKVE", "title": "Student story: Extracurriculars that are a passion", "kind": "Video", "slug": "ss-extracurriculars-that-are-a-passion"}, {"path": "khan/college-admissions/making-high-school-count/extracurricular-and-leadership/ss-extracurriculars-that-carry-over-from-high-school-to-college/", "id": "aCbyeNsc1Ck", "title": "Student story: Extracurriculars that carry over from high school to college", "kind": "Video", "slug": "ss-extracurriculars-that-carry-over-from-high-school-to-college"}], "in_knowledge_map": false, "description": "Whether you play sports, act in theatrical productions, or babysit younger siblings - extracurricular activities include everything you do when you're not in class. Admissions officers explain how they evaluate these activities in the context of your college application, and current college students tell their stories of extracurricular activities in high school.", "node_slug": "extracurricular-and-leadership", "render_type": "Tutorial", "topic_page_url": "/college-admissions/making-high-school-count/extracurricular-and-leadership", "extended_slug": "college-admissions/making-high-school-count/extracurricular-and-leadership", "kind": "Topic", "slug": "extracurricular-and-leadership"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/making-high-school-count/standardized-tests/", "id": "standardized-tests", "hide": false, "title": "Standardized tests", "child_data": [{"kind": "Video", "id": "x19ca7469"}, {"kind": "Video", "id": "x22ede1da"}, {"kind": "Video", "id": "x32231888"}, {"kind": "Video", "id": "x424f9037"}, {"kind": "Video", "id": "x0a44f793"}, {"kind": "Article", "id": "x9c8ede5b"}, {"kind": "Video", "id": "x2ad21150"}], "children": [{"path": "khan/college-admissions/making-high-school-count/standardized-tests/facing-the-standardized-tests/", "id": "Fp7d-NmKN5M", "title": "Facing the standardized tests", "kind": "Video", "slug": "facing-the-standardized-tests"}, {"path": "khan/college-admissions/making-high-school-count/standardized-tests/overview-of-sat/", "id": "NhkfQEkmwlE", "title": "Overview of the SAT", "kind": "Video", "description": "Official SAT Website\u00a0| Khan Academy SAT Prep", "slug": "overview-of-sat"}, {"path": "khan/college-admissions/making-high-school-count/standardized-tests/deciding-to-retake-sat/", "id": "3JqIbemBlss", "title": "Deciding whether to retake the SAT", "kind": "Video", "slug": "deciding-to-retake-sat"}, {"path": "khan/college-admissions/making-high-school-count/standardized-tests/overview-of-act/", "id": "Mu2pqXgArxY", "title": "Overview of the ACT", "kind": "Video", "description": "Official ACT Website", "slug": "overview-of-act"}, {"path": "khan/college-admissions/making-high-school-count/standardized-tests/deciding-to-retake-act/", "id": "CcUBNRLDgrQ", "title": "Deciding whether to retake the ACT", "kind": "Video", "description": "Official ACT Website", "slug": "deciding-to-retake-act"}, {"path": "khan/college-admissions/making-high-school-count/standardized-tests/ss-standardized-tests/", "id": "jiq8Baz4KzU", "title": "Student story: Standardized tests", "kind": "Video", "slug": "ss-standardized-tests"}], "in_knowledge_map": false, "description": "Nothing strikes fear into the hearts of students aspiring to college quite like the SAT/ACT, standardized tests that many schools require as part of their application package. Overcome that fear now by getting a primer on what these tests cover, how they are scored, and the impact they have on college admissions.", "node_slug": "standardized-tests", "render_type": "Tutorial", "topic_page_url": "/college-admissions/making-high-school-count/standardized-tests", "extended_slug": "college-admissions/making-high-school-count/standardized-tests", "kind": "Topic", "slug": "standardized-tests"}], "in_knowledge_map": false, "description": "Whether you're just entering 9th grade or in the thick of your junior year, it's never too early to begin thinking about college. Find out how your academic record, extracurricular activities, and standardized test results impact the college admissions process.", "node_slug": "making-high-school-count", "render_type": "Topic", "topic_page_url": "/college-admissions/making-high-school-count", "extended_slug": "college-admissions/making-high-school-count", "kind": "Topic", "slug": "making-high-school-count"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/college-admissions/explore-college-options/", "id": "explore-college-options", "hide": false, "title": "Exploring college options", "child_data": [{"kind": "Topic", "id": "xb1b531ca"}, {"kind": "Topic", "id": "x5ef613b2"}, {"kind": "Topic", "id": "xf4bab12b"}, {"kind": "Topic", "id": "x37500e37"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/explore-college-options/introduction-eco/", "id": "introduction-eco", "hide": false, "title": "Introduction: Exploring college options", "child_data": [{"kind": "Video", "id": "x94147ce0"}, {"kind": "Video", "id": "x6ee0074e"}, {"kind": "Article", "id": "x188d2e84"}], "children": [{"path": "khan/college-admissions/explore-college-options/introduction-eco/sal-khans-story-exploring-college-options/", "id": "3fEIvVnGUcI", "title": "Sal Khan's story: Exploring college options", "kind": "Video", "slug": "sal-khans-story-exploring-college-options"}, {"path": "khan/college-admissions/explore-college-options/introduction-eco/overview-exploring-college-options/", "id": "9ZnvDzfMRps", "title": "Overview: Exploring college options", "kind": "Video", "slug": "overview-exploring-college-options"}], "in_knowledge_map": false, "description": "Hear from Sal and several guidance counselors on what it takes to find great college matches. Then, begin planning your own search with a timeline for exploring college options.", "node_slug": "introduction-eco", "render_type": "Tutorial", "topic_page_url": "/college-admissions/explore-college-options/introduction-eco", "extended_slug": "college-admissions/explore-college-options/introduction-eco", "kind": "Topic", "slug": "introduction-eco"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/explore-college-options/college-search-type-of-college/", "id": "college-search-type-of-college", "hide": false, "title": "College search: Type of college", "child_data": [{"kind": "Article", "id": "x5fee3475"}, {"kind": "Video", "id": "xac2b75df"}, {"kind": "Video", "id": "xceae2c8f"}, {"kind": "Video", "id": "x40d9e0ad"}, {"kind": "Video", "id": "xf31f8f0d"}, {"kind": "Video", "id": "x59a3f8ce"}], "children": [{"path": "khan/college-admissions/explore-college-options/college-search-type-of-college/comparing-vocational-vs-2-year-vs-4-year-colleges/", "id": "S-eipYmOy9Q", "title": "Comparing vocational vs 2 year vs 4 year colleges", "kind": "Video", "description": "Filter by 2-year vs. 4-year options using College Board's college search tool", "slug": "comparing-vocational-vs-2-year-vs-4-year-colleges"}, {"path": "khan/college-admissions/explore-college-options/college-search-type-of-college/comparing-public-vs-private-colleges/", "id": "EUn3yJsc4Cs", "title": "Comparing public vs private colleges", "kind": "Video", "description": "Filter by public vs. private options using College Board's college search tool", "slug": "comparing-public-vs-private-colleges"}, {"path": "khan/college-admissions/explore-college-options/college-search-type-of-college/universities-vs-liberal-arts-colleges/", "id": "D02rH3Ufcy8", "title": "Comparing universities vs liberal arts colleges", "kind": "Video", "description": "Search for universities and liberal arts colleges using College Board's search tool", "slug": "universities-vs-liberal-arts-colleges"}, {"path": "khan/college-admissions/explore-college-options/college-search-type-of-college/comparing-nonprofit-vs-for-profit-colleges/", "id": "0gXdtpz9GN4", "title": "Comparing nonprofit vs. for profit colleges", "kind": "Video", "description": "Find average debt-levels and graduation rates at nonprofit and for profit colleges", "slug": "comparing-nonprofit-vs-for-profit-colleges"}, {"path": "khan/college-admissions/explore-college-options/college-search-type-of-college/comparing-highly-selective-vs-selective-vs-nonselective-colleges/", "id": "2h6RdAxIMO8", "title": "Comparing highly selective vs selective vs nonselective colleges", "kind": "Video", "description": "Filter by selectivity using College Board's college search tool", "slug": "comparing-highly-selective-vs-selective-vs-nonselective-colleges"}], "in_knowledge_map": false, "description": "Community college or 4-year program? Public or private? University or liberal arts college? There are countless exciting decisions to make as you consider your college options, and the first step is understanding the types of colleges out there!", "node_slug": "college-search-type-of-college", "render_type": "Tutorial", "topic_page_url": "/college-admissions/explore-college-options/college-search-type-of-college", "extended_slug": "college-admissions/explore-college-options/college-search-type-of-college", "kind": "Topic", "slug": "college-search-type-of-college"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/", "id": "college-search-other-imp-choices", "hide": false, "title": "College search: Other important choices", "child_data": [{"kind": "Video", "id": "x704b38f5"}, {"kind": "Video", "id": "x41ceb328"}, {"kind": "Video", "id": "x6725a821"}, {"kind": "Video", "id": "x0632b588"}, {"kind": "Video", "id": "x686d3290"}, {"kind": "Video", "id": "x7b356bb0"}, {"kind": "Video", "id": "x10995520"}, {"kind": "Video", "id": "x7890e395"}, {"kind": "Video", "id": "xf05aa776"}, {"kind": "Video", "id": "x7914926b"}, {"kind": "Video", "id": "xa8042036"}], "children": [{"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/comparing-colleges-financial-aid-policies/", "id": "KgI07h9VgWM", "title": "Comparing colleges based on financial aid policies", "kind": "Video", "description": "Filter by financial aid policy using College Board's college search tool", "slug": "comparing-colleges-financial-aid-policies"}, {"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/comparing-colleges-special-focus-or-affiliation/", "id": "PzmKc8leu9o", "title": "Comparing colleges based on special focus or affiliation", "kind": "Video", "description": "FIlter by special focus or affiliation using College Board's college search tool", "slug": "comparing-colleges-special-focus-or-affiliation"}, {"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/comparing-colleges-diversity/", "id": "RTE_aitAPGw", "title": "Comparing colleges based on diversity", "kind": "Video", "description": "Filter by percentage of minority students using College Board's college search tool", "slug": "comparing-colleges-diversity"}, {"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/comparing-colleges-location-size-housing/", "id": "2DmYxB97KQ0", "title": "Comparing colleges based on location, size, and housing", "kind": "Video", "description": "Filter by location, size, and housing options using College Board's college search tool", "slug": "comparing-colleges-location-size-housing"}, {"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/comparing-colleges-campus-activities/", "id": "YPm6Bi-eKsQ", "title": "Comparing colleges based on campus activities", "kind": "Video", "description": "Filter by campus activities using College Board's college search tool", "slug": "comparing-colleges-campus-activities"}, {"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/comparing-colleges-major-offered/", "id": "pWM5ONbMPeE", "title": "Comparing colleges based on majors offered", "kind": "Video", "description": "Filter by major offered using College Board's college search tool", "slug": "comparing-colleges-major-offered"}, {"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/ss-financial-aid-college-search/", "id": "6hFiTU77Sm0", "title": "Student story: Prioritizing financial aid in the college search", "kind": "Video", "slug": "ss-financial-aid-college-search"}, {"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/ss-location-college-search/", "id": "d_Q3mgcIiCw", "title": "Student story: Prioritizing location in the college search", "kind": "Video", "slug": "ss-location-college-search"}, {"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/ss-financial-aid-major-location-college-search/", "id": "ALlKbGE6BH0", "title": "Student story: Prioritizing financial aid, major, and location in the college search", "kind": "Video", "slug": "ss-financial-aid-major-location-college-search"}, {"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/ss-size-campus-major-selectivity-college-search/", "id": "EQhBl75ZiKQ", "title": "Student story: Prioritizing size, campus, major, and selectivity in the college search", "kind": "Video", "slug": "ss-size-campus-major-selectivity-college-search"}, {"path": "khan/college-admissions/explore-college-options/college-search-other-imp-choices/ss-campus-size-selectivity-financial-aid-college-search/", "id": "Jdu1scUjIHQ", "title": "Student story: Prioritizing size, selectivity, diversity and financial aid in the college search", "kind": "Video", "slug": "ss-campus-size-selectivity-financial-aid-college-search"}], "in_knowledge_map": false, "description": "Now that you have a sense of the types of colleges that exist, it's time to start thinking about other important options - financial aid policies, campus size, location, etc. -that will have a major impact on your college experience.", "node_slug": "college-search-other-imp-choices", "render_type": "Tutorial", "topic_page_url": "/college-admissions/explore-college-options/college-search-other-imp-choices", "extended_slug": "college-admissions/explore-college-options/college-search-other-imp-choices", "kind": "Topic", "slug": "college-search-other-imp-choices"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/explore-college-options/campus-visit/", "id": "campus-visit", "hide": false, "title": "Campus visit", "child_data": [{"kind": "Video", "id": "x64af2ae1"}], "children": [{"path": "khan/college-admissions/explore-college-options/campus-visit/visiting-campus/", "id": "Bp-iW9YxnNU", "title": "Visiting campus", "kind": "Video", "description": "Campus Visit Alternative: Online Tour", "slug": "visiting-campus"}], "in_knowledge_map": false, "description": "Once you've identified several target schools, a campus visit can be a great way to narrow down your options. Even if you can't visit target colleges that are located far away, taking time to explore your local college campus can give you a sense of what you want in a college.", "node_slug": "campus-visit", "render_type": "Tutorial", "topic_page_url": "/college-admissions/explore-college-options/campus-visit", "extended_slug": "college-admissions/explore-college-options/campus-visit", "kind": "Topic", "slug": "campus-visit"}], "in_knowledge_map": false, "description": "There are nearly 3,000 colleges in the United States that offer 4-year degrees. The sheer variety of options, from rural liberal arts colleges to public state universities, can feel overwhelming. After you understand the differences between what's out there and begin to get a sense of what you want, however, the choice becomes infinitely more manageable!", "node_slug": "explore-college-options", "render_type": "Topic", "topic_page_url": "/college-admissions/explore-college-options", "extended_slug": "college-admissions/explore-college-options", "kind": "Topic", "slug": "explore-college-options"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/college-admissions/applying-to-college/", "id": "applying-to-college", "hide": false, "title": "Applying to college", "child_data": [{"kind": "Topic", "id": "xe8b60e7d"}, {"kind": "Topic", "id": "x120c8728"}, {"kind": "Topic", "id": "xaf4a65a9"}, {"kind": "Topic", "id": "x61cd810b"}, {"kind": "Topic", "id": "x9ee64d1d"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/applying-to-college/introduction-atc/", "id": "introduction-atc", "hide": false, "title": "Introduction: Applying to college", "child_data": [{"kind": "Video", "id": "xfec66639"}, {"kind": "Video", "id": "x1e10225d"}, {"kind": "Article", "id": "x83f79030"}], "children": [{"path": "khan/college-admissions/applying-to-college/introduction-atc/sal-khans-story-applying-to-college/", "id": "cuShHDFBiE8", "title": "Sal Khan's story: Applying to college", "kind": "Video", "slug": "sal-khans-story-applying-to-college"}, {"path": "khan/college-admissions/applying-to-college/introduction-atc/overview-applying-to-college/", "id": "jPrEKz1rAno", "title": "Overview: Applying to college", "kind": "Video", "slug": "overview-applying-to-college"}], "in_knowledge_map": false, "description": "Hear from Sal and admissions officers on what it takes to put together a college application. Then, begin organizing your own materials with a timeline for the college application process.", "node_slug": "introduction-atc", "render_type": "Tutorial", "topic_page_url": "/college-admissions/applying-to-college/introduction-atc", "extended_slug": "college-admissions/applying-to-college/introduction-atc", "kind": "Topic", "slug": "introduction-atc"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/applying-to-college/college-application-process/", "id": "college-application-process", "hide": false, "title": "College application process", "child_data": [{"kind": "Video", "id": "x313ee092"}, {"kind": "Article", "id": "x71a530c1"}, {"kind": "Article", "id": "xee6f50d9"}, {"kind": "Video", "id": "x5c217f6e"}, {"kind": "Video", "id": "x4a4bd9e2"}], "children": [{"path": "khan/college-admissions/applying-to-college/college-application-process/early-vs-regular-decision/", "id": "7Un_Uu_sACI", "title": "Deciding when to apply: Early vs regular decision", "kind": "Video", "slug": "early-vs-regular-decision"}, {"path": "khan/college-admissions/applying-to-college/college-application-process/applying-to-the-right-number-of-colleges/", "id": "CFvVkPNV7cI", "title": "Applying to the right number of colleges", "kind": "Video", "slug": "applying-to-the-right-number-of-colleges"}, {"path": "khan/college-admissions/applying-to-college/college-application-process/receiving-an-admissions-decision-admit-deny-or-waitlist/", "id": "ecA0shEaARM", "title": "Receiving an admissions decision: Admit, deny, or waitlist", "kind": "Video", "slug": "receiving-an-admissions-decision-admit-deny-or-waitlist"}], "in_knowledge_map": false, "description": "Start by addressing some of the basic questions of the college application process: when should you apply, how should you fill out the application forms, and when have you applied to enough schools?", "node_slug": "college-application-process", "render_type": "Tutorial", "topic_page_url": "/college-admissions/applying-to-college/college-application-process", "extended_slug": "college-admissions/applying-to-college/college-application-process", "kind": "Topic", "slug": "college-application-process"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/applying-to-college/admissions-essays/", "id": "Admissions-essays", "hide": false, "title": "Admissions essays", "child_data": [{"kind": "Video", "id": "x7729d40f"}, {"kind": "Video", "id": "x147229ac"}, {"kind": "Article", "id": "x551413fc"}, {"kind": "Article", "id": "x9ab0967b"}, {"kind": "Video", "id": "x318183ff"}, {"kind": "Video", "id": "x5198f41b"}, {"kind": "Video", "id": "xbcc75df9"}, {"kind": "Video", "id": "xe25d5a82"}, {"kind": "Video", "id": "xedc4818a"}], "children": [{"path": "khan/college-admissions/applying-to-college/admissions-essays/writing-a-strong-college-admissions-essay/", "id": "tRC0HZyNCW4", "title": "Writing a strong college admissions essay", "kind": "Video", "slug": "writing-a-strong-college-admissions-essay"}, {"path": "khan/college-admissions/applying-to-college/admissions-essays/avoiding-common-admissions-essay-mistakes/", "id": "t__jNTOwePU", "title": "Avoiding common admissions essay mistakes", "kind": "Video", "slug": "avoiding-common-admissions-essay-mistakes"}, {"path": "khan/college-admissions/applying-to-college/admissions-essays/ss-admissions-essay-formative-experience/", "id": "cQRJYTBozXQ", "title": "Student story: Admissions essay about a formative experience", "kind": "Video", "slug": "ss-admissions-essay-formative-experience"}, {"path": "khan/college-admissions/applying-to-college/admissions-essays/ss-admissions-essay-personal-identity/", "id": "KDb3YEnM0WY", "title": "Student story: Admissions essay about personal identity", "kind": "Video", "slug": "ss-admissions-essay-personal-identity"}, {"path": "khan/college-admissions/applying-to-college/admissions-essays/ss-admissions-essay-community-impact/", "id": "VX643tF89ZE", "title": "Student story: Admissions essay about community impact", "kind": "Video", "slug": "ss-admissions-essay-community-impact"}, {"path": "khan/college-admissions/applying-to-college/admissions-essays/ss-admissions-essay-past-mistake/", "id": "4-LNrHGwtL0", "title": "Student story: Admissions essay about a past mistake", "kind": "Video", "slug": "ss-admissions-essay-past-mistake"}, {"path": "khan/college-admissions/applying-to-college/admissions-essays/ss-admissions-essay-meaningful-poem/", "id": "08gsb8p--JM", "title": "Student story: Admissions essay about a meaningful poem", "kind": "Video", "slug": "ss-admissions-essay-meaningful-poem"}], "in_knowledge_map": false, "description": "Students often view the admissions essay as a chance to show off their \"x-factor.\" Is that the best approach? Hear from admissions officers and current college students about what actually makes a great college application essay.", "node_slug": "Admissions-essays", "render_type": "Tutorial", "topic_page_url": "/college-admissions/applying-to-college/Admissions-essays", "extended_slug": "college-admissions/applying-to-college/Admissions-essays", "kind": "Topic", "slug": "admissions-essays"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/applying-to-college/letters-of-recommendation/", "id": "letters-of-recommendation", "hide": false, "title": "Letters of recommendation", "child_data": [{"kind": "Video", "id": "x00d71fc9"}, {"kind": "Video", "id": "xb8cc4baf"}, {"kind": "Article", "id": "x2b835c8f"}], "children": [{"path": "khan/college-admissions/applying-to-college/letters-of-recommendation/requesting-letters-of-recommendation/", "id": "tDGVAyx-_xQ", "title": "Requesting letters of recommendation", "kind": "Video", "slug": "requesting-letters-of-recommendation"}, {"path": "khan/college-admissions/applying-to-college/letters-of-recommendation/elements-of-a-strong-letter-of-recommendation/", "id": "Zcpwdcvz3KE", "title": "Elements of a strong recommendation letter", "kind": "Video", "slug": "elements-of-a-strong-letter-of-recommendation"}], "in_knowledge_map": false, "description": "Don't brag about yourself in the college essay; let others do it for you in their letters of recommendation! Experts explain who to ask for your recommendation letters and how to make sure they have the intended impact on your college application.", "node_slug": "letters-of-recommendation", "render_type": "Tutorial", "topic_page_url": "/college-admissions/applying-to-college/letters-of-recommendation", "extended_slug": "college-admissions/applying-to-college/letters-of-recommendation", "kind": "Topic", "slug": "letters-of-recommendation"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/applying-to-college/admissions-interviews/", "id": "admissions-interviews", "hide": false, "title": "Admissions interviews", "child_data": [{"kind": "Video", "id": "xfae19ae6"}, {"kind": "Video", "id": "xc111329a"}], "children": [{"path": "khan/college-admissions/applying-to-college/admissions-interviews/succeeding-at-the-admissions-interview/", "id": "4qY9icExjEw", "title": "Succeeding at the college admissions interview", "kind": "Video", "slug": "succeeding-at-the-admissions-interview"}, {"path": "khan/college-admissions/applying-to-college/admissions-interviews/ss-admissions-interview/", "id": "bEm2olQ3iJA", "title": "Student story: Admissions interview", "kind": "Video", "slug": "ss-admissions-interview"}], "in_knowledge_map": false, "description": "It pays to be prepared for your college interview. Learn how admissions officer view the interview and how current college students approached the process as they were applying to school.", "node_slug": "admissions-interviews", "render_type": "Tutorial", "topic_page_url": "/college-admissions/applying-to-college/admissions-interviews", "extended_slug": "college-admissions/applying-to-college/admissions-interviews", "kind": "Topic", "slug": "admissions-interviews"}], "in_knowledge_map": false, "description": "Once you've decided on several target schools, it's time to put together the all-important college application! Prepare yourself for success with guidance from experts on topics such as admissions essays, letters of recommendation, and alumni interviews.", "node_slug": "applying-to-college", "render_type": "Topic", "topic_page_url": "/college-admissions/applying-to-college", "extended_slug": "college-admissions/applying-to-college", "kind": "Topic", "slug": "applying-to-college"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/college-admissions/paying-for-college/", "id": "paying-for-college", "hide": false, "title": "Paying for college", "child_data": [{"kind": "Topic", "id": "xd8587c03"}, {"kind": "Topic", "id": "x780a5c6d"}, {"kind": "Topic", "id": "x0c47cc55"}, {"kind": "Topic", "id": "xfac1e4f5"}, {"kind": "Topic", "id": "x68e32d02"}, {"kind": "Topic", "id": "x9f5c17f1"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/paying-for-college/introduction-pfc/", "id": "introduction-pfc", "hide": false, "title": "Introduction: Paying for college", "child_data": [{"kind": "Video", "id": "x610f1166"}, {"kind": "Video", "id": "x0a3e5e50"}, {"kind": "Video", "id": "x94ba61ec"}, {"kind": "Article", "id": "x7714fe6e"}], "children": [{"path": "khan/college-admissions/paying-for-college/introduction-pfc/sal-khans-story-paying-for-college/", "id": "mmobuVQPAqk", "title": "Sal Khan's story: Paying for college", "kind": "Video", "slug": "sal-khans-story-paying-for-college"}, {"path": "khan/college-admissions/paying-for-college/introduction-pfc/overview-paying-for-college/", "id": "lnf5ywUA2Y4", "title": "Overview: Paying for college", "kind": "Video", "slug": "overview-paying-for-college"}, {"path": "khan/college-admissions/paying-for-college/introduction-pfc/a-message-to-parents-on-paying-for-college/", "id": "ANGRsubKS3M", "title": "A message to parents on paying for college", "kind": "Video", "description": "FAFSA | CSS Profile | Federal Student Loans | Federal Parent PLUS Loans | College Scorecard & Net Price Calculator | FAFSA4caster | Additional Info on Beth Kobliner", "slug": "a-message-to-parents-on-paying-for-college"}], "in_knowledge_map": false, "description": "Hear from Sal and various experts on what it takes to pay for college. Then, begin organizing your own financial aid plan with a timeline focused on paying for college.", "node_slug": "introduction-pfc", "render_type": "Tutorial", "topic_page_url": "/college-admissions/paying-for-college/introduction-pfc", "extended_slug": "college-admissions/paying-for-college/introduction-pfc", "kind": "Topic", "slug": "introduction-pfc"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/paying-for-college/financial-aid-process/", "id": "financial-aid-process", "hide": false, "title": "Financial aid application process", "child_data": [{"kind": "Video", "id": "x2481811a"}, {"kind": "Article", "id": "x2c2eb06c"}, {"kind": "Article", "id": "xfee4f04d"}, {"kind": "Video", "id": "x6d520dca"}], "children": [{"path": "khan/college-admissions/paying-for-college/financial-aid-process/overview-of-fafsa-and-css-profile/", "id": "ck0pF7xub-k", "title": "Overview of FAFSA and CSS PROFILE", "kind": "Video", "description": "FAFSA - Submit ASAP After Jan 1\u00a0| CSS PROFILE - Submit ASAP", "slug": "overview-of-fafsa-and-css-profile"}, {"path": "khan/college-admissions/paying-for-college/financial-aid-process/applying-for-financial-aid-when-facing-immigration-challenges/", "id": "IvGVGxBoAdU", "title": "Applying for financial aid when facing immigration challenges", "kind": "Video", "slug": "applying-for-financial-aid-when-facing-immigration-challenges"}], "in_knowledge_map": false, "description": "Financial aid forms, including the FAFSA and CSS Profile, represent one of the first step in the financial aid process when you are applying to college.", "node_slug": "financial-aid-process", "render_type": "Tutorial", "topic_page_url": "/college-admissions/paying-for-college/financial-aid-process", "extended_slug": "college-admissions/paying-for-college/financial-aid-process", "kind": "Topic", "slug": "financial-aid-process"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/paying-for-college/grants-and-scholarships/", "id": "grants-and-scholarships", "hide": false, "title": "Grants and scholarships", "child_data": [{"kind": "Video", "id": "xb139e550"}, {"kind": "Video", "id": "x991d0639"}, {"kind": "Video", "id": "xc5cbfdf7"}, {"kind": "Video", "id": "x9c276a05"}, {"kind": "Video", "id": "x6a9fd659"}], "children": [{"path": "khan/college-admissions/paying-for-college/grants-and-scholarships/types-of-grants-and-scholarships/", "id": "A_e9D0iaiAI", "title": "Types of grants and scholarships", "kind": "Video", "slug": "types-of-grants-and-scholarships"}, {"path": "khan/college-admissions/paying-for-college/grants-and-scholarships/searching-for-scholarships/", "id": "d7zqiCrfiUE", "title": "Searching for scholarships", "kind": "Video", "description": "College Board Scholarship Search | Fastweb | Scholarships.com", "slug": "searching-for-scholarships"}, {"path": "khan/college-admissions/paying-for-college/grants-and-scholarships/ss-searching-for-scholarships/", "id": "_TnPWbtoLs8", "title": "Student story: Searching for scholarships", "kind": "Video", "slug": "ss-searching-for-scholarships"}, {"path": "khan/college-admissions/paying-for-college/grants-and-scholarships/ss-applying-for-scholarships/", "id": "gpn71-aKWwQ", "title": "Student story: Applying for scholarships", "kind": "Video", "slug": "ss-applying-for-scholarships"}, {"path": "khan/college-admissions/paying-for-college/grants-and-scholarships/ss-relying-on-scholarships-when-facing-immigration-issues/", "id": "grdcr-X4zUc", "title": "Student story: Relying on scholarships when facing immigration challenges", "kind": "Video", "slug": "ss-relying-on-scholarships-when-facing-immigration-issues"}], "in_knowledge_map": false, "description": "Free money? It might sound too good to be true, but that's just what scholarships and grants - two terms used interchangeably - offer if you put in the time to apply!", "node_slug": "grants-and-scholarships", "render_type": "Tutorial", "topic_page_url": "/college-admissions/paying-for-college/grants-and-scholarships", "extended_slug": "college-admissions/paying-for-college/grants-and-scholarships", "kind": "Topic", "slug": "grants-and-scholarships"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/paying-for-college/work-study/", "id": "work-study", "hide": false, "title": "Work study", "child_data": [{"kind": "Video", "id": "xb40c1389"}, {"kind": "Video", "id": "x17bbed7a"}, {"kind": "Video", "id": "x94f26b4f"}], "children": [{"path": "khan/college-admissions/paying-for-college/work-study/working-during-college/", "id": "SVN1IsRQ88M", "title": "Working during college", "kind": "Video", "slug": "working-during-college"}, {"path": "khan/college-admissions/paying-for-college/work-study/work-study-opportunity-to-learn/", "id": "Rdd1ddubDuU", "title": "Student story: Work study as an opportunity to learn", "kind": "Video", "slug": "work-study-opportunity-to-learn"}, {"path": "khan/college-admissions/paying-for-college/work-study/work-study-study-hall/", "id": "CnAi_YXuwq0", "title": "Student story: Work study as a study hall", "kind": "Video", "slug": "work-study-study-hall"}], "in_knowledge_map": false, "description": "Work-study, one component of a financial aid package, offers you the chance to earn extra funds through on-campus jobs while still going to college full-time. Hear from admissions on how work-study operates and why it just might be the extra money you need to make college affordable.", "node_slug": "work-study", "render_type": "Tutorial", "topic_page_url": "/college-admissions/paying-for-college/work-study", "extended_slug": "college-admissions/paying-for-college/work-study", "kind": "Topic", "slug": "work-study"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/paying-for-college/loans/", "id": "Loans", "hide": false, "title": "Loans", "child_data": [{"kind": "Video", "id": "x7c75da5e"}, {"kind": "Video", "id": "x5105ba01"}, {"kind": "Video", "id": "xa2f45ae7"}, {"kind": "Video", "id": "x179bc0c9"}], "children": [{"path": "khan/college-admissions/paying-for-college/loans/benefits-and-drawbacks-of-college-loans/", "id": "wRKVNiABc0w", "title": "Benefits and drawbacks of college loans", "kind": "Video", "slug": "benefits-and-drawbacks-of-college-loans"}, {"path": "khan/college-admissions/paying-for-college/loans/types-of-college-loans/", "id": "AK2aaur00i4", "title": "Types of college loans", "kind": "Video", "description": "Learn more about federal government loans for college", "slug": "types-of-college-loans"}, {"path": "khan/college-admissions/paying-for-college/loans/managing-your-debt-level/", "id": "E8jeQcDH1fM", "title": "Managing your debt level", "kind": "Video", "slug": "managing-your-debt-level"}, {"path": "khan/college-admissions/paying-for-college/loans/paying-back-your-loans/", "id": "ALzFkqiTpvM", "title": "Paying back your loans", "kind": "Video", "description": "National Student Loan Data System\u00a0| Federal Loan Consolidation\u00a0| Federal Loan Deferment or Forbearance\u00a0| Federal Loan Repayment Estimator | Federal Loan Forgiveness", "slug": "paying-back-your-loans"}], "in_knowledge_map": false, "description": "College loans can be a scary proposition, because unlike scholarships and grants, they have to be paid back (with interest!) after you finish school. However, loans also represent an investment in your future and one that can absolutely be worth it if used in moderation. Learn what sort of loans are out there and how to prioritize between them.", "node_slug": "Loans", "render_type": "Tutorial", "topic_page_url": "/college-admissions/paying-for-college/Loans", "extended_slug": "college-admissions/paying-for-college/Loans", "kind": "Topic", "slug": "loans"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/paying-for-college/financial-aid-packages/", "id": "financial-aid-packages", "hide": false, "title": "Financial aid packages", "child_data": [{"kind": "Video", "id": "xd500a949"}, {"kind": "Video", "id": "x65a59d06"}, {"kind": "Video", "id": "x90008af5"}, {"kind": "Article", "id": "x4bb9c4ef"}, {"kind": "Video", "id": "x0a1cb6fe"}], "children": [{"path": "khan/college-admissions/paying-for-college/financial-aid-packages/financial-aid-package-components-part-1/", "id": "vlUVwfRarNQ", "title": "Financial aid package components: Part 1", "kind": "Video", "slug": "financial-aid-package-components-part-1"}, {"path": "khan/college-admissions/paying-for-college/financial-aid-packages/financial-aid-package-example-part-2/", "id": "GMjwjXKt0SE", "title": "Financial aid package example: Part 2", "kind": "Video", "slug": "financial-aid-package-example-part-2"}, {"path": "khan/college-admissions/paying-for-college/financial-aid-packages/financial-aid-package-comparison-part-3/", "id": "dLojFRoSx8I", "title": "Financial aid package comparison: Part 3", "kind": "Video", "slug": "financial-aid-package-comparison-part-3"}, {"path": "khan/college-admissions/paying-for-college/financial-aid-packages/appealing-a-financial-aid-package/", "id": "eXGVAfv08AQ", "title": "Appealing a financial aid package", "kind": "Video", "slug": "appealing-a-financial-aid-package"}], "in_knowledge_map": false, "description": "Once a college accepts you, they will take the information that you provided on your financial aid forms to determine your financial aid package. Now comes one of the most important parts of the college admissions process: comparing offers to determine which of your top schools provided enough aid to make college affordable.", "node_slug": "financial-aid-packages", "render_type": "Tutorial", "topic_page_url": "/college-admissions/paying-for-college/financial-aid-packages", "extended_slug": "college-admissions/paying-for-college/financial-aid-packages", "kind": "Topic", "slug": "financial-aid-packages"}], "in_knowledge_map": false, "description": "Getting into the college of your dreams is nice, but figuring out how to afford attending that college is even better! Learn how to navigate the financial aid process with guidance on everything from filling out the FAFSA to identifying high priority scholarships.", "node_slug": "paying-for-college", "render_type": "Topic", "topic_page_url": "/college-admissions/paying-for-college", "extended_slug": "college-admissions/paying-for-college", "kind": "Topic", "slug": "paying-for-college"}, {"icon_src": "", "contains": ["Topic", "Video"], "path": "khan/college-admissions/wrapping-up/", "id": "wrapping-up", "hide": false, "title": "Wrapping up", "child_data": [{"kind": "Topic", "id": "x0fc5d64d"}, {"kind": "Topic", "id": "x429c08c4"}, {"kind": "Topic", "id": "x40f2edb0"}], "children": [{"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/wrapping-up/introduction-wu/", "id": "introduction-wu", "hide": false, "title": "Introduction: Wrapping up", "child_data": [{"kind": "Video", "id": "xb5446d02"}, {"kind": "Article", "id": "xbd21b79f"}], "children": [{"path": "khan/college-admissions/wrapping-up/introduction-wu/sal-khans-story-wrapping-up/", "id": "S4T5K4BM3j0", "title": "Sal Khan's story: Wrapping up", "kind": "Video", "slug": "sal-khans-story-wrapping-up"}], "in_knowledge_map": false, "description": "Hear from Sal about how he wrapped up the admissions process, and then begin planning your own college transition.", "node_slug": "introduction-wu", "render_type": "Tutorial", "topic_page_url": "/college-admissions/wrapping-up/introduction-wu", "extended_slug": "college-admissions/wrapping-up/introduction-wu", "kind": "Topic", "slug": "introduction-wu"}, {"icon_src": "", "contains": ["Video"], "path": "khan/college-admissions/wrapping-up/post-college-acceptance/", "id": "post-college-acceptance", "hide": false, "title": "Post college acceptance", "child_data": [{"kind": "Video", "id": "x502e0a53"}, {"kind": "Video", "id": "x06827650"}], "children": [{"path": "khan/college-admissions/wrapping-up/post-college-acceptance/selecting-your-college/", "id": "q71hYD9Xhek", "title": "Selecting your college", "kind": "Video", "slug": "selecting-your-college"}, {"path": "khan/college-admissions/wrapping-up/post-college-acceptance/making-the-transition/", "id": "9B8voIQl8BI", "title": "Making the college transition", "kind": "Video", "slug": "making-the-transition"}], "in_knowledge_map": false, "description": "Now comes the best part - it's time to make your pick! Select the college you will be attending, send in your deposit, and then begin the college transition . Life is about to change, and after you select your college, the decisions are only beginning. From housing and meal plans to orientation and course selection - it's going to be a very busy, very exciting summer!", "node_slug": "post-college-acceptance", "render_type": "Tutorial", "topic_page_url": "/college-admissions/wrapping-up/post-college-acceptance", "extended_slug": "college-admissions/wrapping-up/post-college-acceptance", "kind": "Topic", "slug": "post-college-acceptance"}], "in_knowledge_map": false, "description": "There is nothing more exciting than making the final decision on which college to attend. It takes hard work to get to this point, but you've made it. Now sit back, breathe a sigh of relief, and then learn a bit more about what comes next!", "node_slug": "wrapping-up", "render_type": "Topic", "topic_page_url": "/college-admissions/wrapping-up", "extended_slug": "college-admissions/wrapping-up", "kind": "Topic", "slug": "wrapping-up"}], "in_knowledge_map": false, "description": "Navigate college admissions like a pro with Khan Academy's evolving resource! Inside, find advice that is relevant for all college applicants in addition to portions tailored for high potential students who are worried about whether they can afford higher education.", "node_slug": "college-admissions", "render_type": "Subject", "topic_page_url": "/college-admissions", "extended_slug": "college-admissions", "kind": "Topic", "slug": "college-admissions"}], "in_knowledge_map": false, "description": "", "node_slug": "root", "render_type": "Root", "topic_page_url": "/", "extended_slug": "", "kind": "Topic", "slug": "khan"}
\ No newline at end of file
diff --git a/data/khan/video_file_sizes.json b/data/khan/video_file_sizes.json
deleted file mode 100644
index e71f647e0f..0000000000
--- a/data/khan/video_file_sizes.json
+++ /dev/null
@@ -1,8437 +0,0 @@
-{
- "--VYlmbkzNY": 8251333,
- "--ezF4qkjxg": 1737488,
- "-05OfTp6ZEE": 7418595,
- "-0qEDcZZS9E": 14520820,
- "-0zm323sehQ": 21112273,
- "-1KeL9wVfOY": 13526256,
- "-1ZFVwMXSXY": 33254159,
- "-1w9RXhCmsE": 3605195,
- "-2HwisGonfc": 1634902,
- "-2OOBEBq9-4": 22735164,
- "-3DFzxbP9Fk": 1901768,
- "-4bTgmmWI9k": 6399417,
- "-4kGMI-qQ3I": 19442514,
- "-4s4vYJnIW4": 11302729,
- "-6EqUILZ1yw": 25082115,
- "-6Fu2T_RSGM": 7947081,
- "-6KzZKuQ1lk": 5661181,
- "-6XBnjFrWBg": 41609715,
- "-6hoDNZoV5g": 73461638,
- "-6qiO49Q180": 18116482,
- "-7kSDHFXwZ4": 26044179,
- "-83vVeSC2_g": 10549304,
- "-8cCBEFlOyw": 11407548,
- "-9gl_HlsatI": 62949748,
- "-Aj5BTnz-v0": 15296287,
- "-B-i-g6cjic": 11128445,
- "-BVeSykcQeE": 17245412,
- "-BYHn5Vum_A": 43978115,
- "-BYomxn8Rss": 5913402,
- "-Bykx5cBKMI": 21001141,
- "-DDSEQlZKsE": 9794608,
- "-DTMakGDZAw": 9463730,
- "-DlCeZw9RFw": 35044985,
- "-EG10aI0rt0": 2512518,
- "-F4qnA1PFzE": 20255320,
- "-FquswEIswk": 17235221,
- "-FtlH4svqx4": 14566216,
- "-IDmLERenrU": 6049175,
- "-IRkisEtzsk": 56770437,
- "-J--4Jc5FB0": 30039210,
- "-J-6VGxld54": 3674651,
- "-JTw7gNwT6Y": 28036248,
- "-Jx6vyc_830": 7787838,
- "-KE7jTXwNYs": 8021999,
- "-KrSxA9NCf0": 7512441,
- "-LTXzYXaAuk": 12736139,
- "-LgtilBrA4g": 73214413,
- "-MQ5dL9cQX0": 79540791,
- "-MYh3s__qlA": 2309624,
- "-MaD9Ycy3a4": 67630301,
- "-Po57YmaW3w": 28940948,
- "-QHff5pRdM8": 19763785,
- "-QpUrSn3cWU": 32545355,
- "-QpkmwIoMaY": 23958841,
- "-ROhfKyxgCo": 13121068,
- "-RT52vs9tBI": 1357937,
- "-ScrE9jd4Do": 1290526,
- "-T0OKK-R3lA": 2653717,
- "-TpiL4J_yUA": 1943692,
- "-U8Fl45-DFw": 23018145,
- "-UZuG3XpAd0": 59145580,
- "-UagBvxCReA": 143742170,
- "-V-Y5klejSg": 5225298,
- "-V51ZjxFeH4": 111848030,
- "-VQf_hJOEvM": 8704459,
- "-W3RkgvLrGI": 2904178,
- "-XRQovTI04Q": 4378610,
- "-Xv593jgyJ4": 18053998,
- "-Y3CbsxhlQE": 16124110,
- "-YBon6e5y0Y": 28356406,
- "-YEtWOxweRg": 20237973,
- "-YI6UC4qVEY": 4683252,
- "-YYTUTrxl28": 6187863,
- "-YfemQNTkvA": 18332992,
- "-YpEkExjq2E": 3695908,
- "-ZS6FI24roY": 1315280,
- "-Zlq5tNl94M": 5143635,
- "-_xZZt99MzY": 35363876,
- "-aGYytZ7K7M": 21206654,
- "-aTy1ED1m5I": 4142936,
- "-a_w0_VAo6U": 2712332,
- "-bE-Pydad7U": 136849679,
- "-bX9cFGKm1o": 11306769,
- "-bnCHws9qmw": 61624100,
- "-bt-H5VQl5E": 18828767,
- "-cApVwKR1Ps": 9740463,
- "-cR6FzM1zNE": 6341308,
- "-dADFDGte6g": 1341958,
- "-eAzhBZgq28": 21930757,
- "-ejyeII0i5c": 9714427,
- "-epr8lPIZYE": 10230849,
- "-fCVxTTAtFQ": 32504650,
- "-fIsaqN-aaQ": 10054487,
- "-fUGOHkAMN4": 9878497,
- "-gB1y-PMWfs": 2944701,
- "-gRNRBCG3Ow": 7894995,
- "-gWtl6mdpeY": 4479778,
- "-gcm5NneR6M": 177051284,
- "-h3Oqhl8fPg": 7724384,
- "-hFAKd923eI": 129355143,
- "-hJj5NpWUXQ": 9999677,
- "-hQiIxfoPP0": 6740400,
- "-h_x8TwC1ik": 3385303,
- "-ij_dFJvMYk": 33191555,
- "-jXFckR2yoY": 45376901,
- "-kKCjwNvNkQ": 58620014,
- "-kn_8vUT0eI": 254846591,
- "-lIc5z3XjXQ": 12564658,
- "-lUEWEEpmIo": 1244167,
- "-ngmZo-dvy4": 114367453,
- "-nlMXVrgtjw": 5072881,
- "-nrSCokEUXg": 18612394,
- "-nufZ41Kg5c": 2933887,
- "-nve3n7WD0w": 118305737,
- "-oClpRv7msg": 5415825,
- "-oFlAhtear4": 1437241,
- "-oHlcuS7AeU": 19874346,
- "-oJs5u_GAYA": 41308149,
- "-oW4M3vpuRM": 8917714,
- "-oXAekrYytA": 63515601,
- "-p_-0n2f35o": 10509043,
- "-qP2831i9Rc": 1272066,
- "-qV__tYb4c4": 13077876,
- "-r7JwuSdj5M": 2354192,
- "-rGXAfc643A": 270419928,
- "-rke7RmxwfY": 106742899,
- "-rsYk4eCKnA": 15292107,
- "-rxUip6Ulnw": 1087966,
- "-sA-vI2a2mM": 3356619,
- "-sSDb_wZqKQ": 1585146,
- "-u0mqFqpMNY": 9005313,
- "-u8xi7KFHY4": 101304106,
- "-uZt8MLeDrg": 8812237,
- "-vp1X7_u3KU": 17314755,
- "-wTI7EC-i30": 21769704,
- "-xYkTJFbuM0": 5735576,
- "-y90WYn8nzk": 19818470,
- "-y9SELk3UNU": 8864271,
- "-yCIMk1x0Pk": 23536810,
- "-yfjQGg-aMA": 56855318,
- "-z2yk8yxv08": 5025146,
- "-z9xnAdR2y4": 118699268,
- "-zNVjW42cyk": 7206014,
- "0-pHx5rKKqI": 11682625,
- "00fgAG6VrRQ": 6498342,
- "00qYQahwuSQ": 13544748,
- "01c12NaUQDw": 1757525,
- "01crUV4VSkk": 68421210,
- "02-uWdzs7o8": 22172453,
- "02gVmoObrjM": 7404963,
- "02h9yhc7ruc": 5452291,
- "03Y76Q7tlSw": 7107634,
- "03fkmtPDhcE": 31351480,
- "03yq7XsErqo": 827351,
- "049sSl4lEuk": 6461947,
- "04N79tItPEA": 1383478,
- "04RpkdaNzr8": 2411119,
- "04gQ0bQu6xk": 15339647,
- "05qDIjKevJo": 19369747,
- "06j_zPdPWOY": 6122642,
- "06z7Q8TWPyU": 11119881,
- "08gsb8p--JM": 33095777,
- "09Cx7xuIXig": 8778909,
- "09VLUSkaZU8": 4610898,
- "09YsW2U-7kw": 99386516,
- "0A7RR0oy2ho": 11444717,
- "0AkUTNMTDis": 18184204,
- "0B91xPrwcPE": 4018195,
- "0BgUKHTW37E": 6008246,
- "0C2Ucb69eOM": 57799692,
- "0CQ5ls3Uc2Q": 26232523,
- "0DBDuNYsciY": 2321594,
- "0D_rc92g27w": 149788249,
- "0Dd-y_apbRw": 11686183,
- "0E3PuHiDU9U": 3267052,
- "0FufW_MZMa4": 11344516,
- "0FxRYePmogU": 7339720,
- "0HScNiJWPKY": 3992638,
- "0JW9P_T4P_Y": 4668771,
- "0L2xCwD5RNI": 7977486,
- "0LM6wPpypxM": 17455120,
- "0MKsFD03Ukc": 13108300,
- "0MT3iUH3bTs": 2899793,
- "0NyeDUhKwBE": 7162132,
- "0OloYD_kSbU": 3510547,
- "0OrF-ls7wmM": 17634796,
- "0OtSs2xEpzY": 11609141,
- "0P0SCQf-hWQ": 2789459,
- "0QPL8kc-aDo": 254919491,
- "0QS4VHPV4JA": 8987533,
- "0QlJrnRRfW8": 2888687,
- "0RRVV4Diomg": 187865252,
- "0RSMKyRVuV8": 4350359,
- "0Rmmynff5Yc": 1571081,
- "0T5D04kjvFM": 60809953,
- "0TRjw-Ot9Pc": 12048472,
- "0URl8p39wQo": 10061328,
- "0UgQ0B_0hAg": 47904512,
- "0UrcjBLz6B0": 38817517,
- "0VARkb_n-Bs": 2178799,
- "0VBQnR2h8XM": 6479074,
- "0WUXQNjdRvM": 2344532,
- "0WiTaBI82Mc": 8967325,
- "0WxPx3_ZSBI": 131153093,
- "0XAE9Q9jfBY": 5417949,
- "0XSSPow5oAc": 10624861,
- "0Xxm2SGuGTk": 49728723,
- "0YD5xSvseIw": 976252,
- "0YErxSShF0A": 3508130,
- "0YOGrTNgGhE": 9875613,
- "0Z63Mv8hGnU": 4057460,
- "0ZKtsUkrgFQ": 11786599,
- "0ZstEh_8bYc": 23102091,
- "0_DYEFtlCiM": 6116489,
- "0_VaUYoNV7Y": 3464693,
- "0b2Tl0x-niw": 4596509,
- "0boZOi9-U-k": 1114656,
- "0c7dt2SQfLw": 9578348,
- "0cHCpgQD_8k": 15061340,
- "0dcDHJVojVY": 15912971,
- "0eDwckZOffc": 3973286,
- "0eWm-LY23W0": 2435423,
- "0emD1AmfdjY": 7672004,
- "0eu-3FIRRz8": 22339650,
- "0fKBhvDjuy0": 53790021,
- "0fPwsLeH8fA": 6829199,
- "0fWuPR1AsJ4": 11021514,
- "0gXdtpz9GN4": 12902040,
- "0gzSreH8nUI": 4505498,
- "0h5Jd7sgQWY": 34997188,
- "0imeUgSxR10": 13274697,
- "0isM0GF-rMI": 7379669,
- "0jK5x_hsTvY": 4070446,
- "0jk6uLZ1Tdc": 4223091,
- "0k0iKKF2-Do": 21136408,
- "0lGXGz_lALM": 18276017,
- "0lOpqmTdtzk": 4090759,
- "0lSTXtwPuOU": 2614440,
- "0lX34MHTs8E": 190092588,
- "0lY4PcCYoyE": 2575973,
- "0mBwsg-wagU": 21169866,
- "0mOH-qNGM7M": 6640378,
- "0mWq45973ok": 1601965,
- "0mdS4GH7Lkw": 8862332,
- "0nKP1FdSzEg": 8625822,
- "0na0xtIHkXA": 20498892,
- "0njioQqIxKY": 2512461,
- "0oGJTQCy4cQ": 3401032,
- "0pv0QtOi5l8": 8854289,
- "0rlNHYHhrWs": 4322908,
- "0rzL08BHr5c": 3769530,
- "0sCttufU-jQ": 8199424,
- "0t4MF9ZoppM": 66051611,
- "0t8W4JFpP2M": 3361213,
- "0tXxFPHzFFI": 3362251,
- "0uCslW40VHQ": 2078531,
- "0uGPdsF4ZmE": 11238243,
- "0uHhk7P9SNo": 8914647,
- "0ugcw7wOZBg": 10043287,
- "0v1C5x1ALI8": 18601306,
- "0w96SqrvVjw": 9974617,
- "0w9R_foNLrg": 15582491,
- "0xrvRKHoO2g": 1548538,
- "0xvaYVoBwzU": 12146524,
- "0z52CLjC2C0": 3395292,
- "0zCcFSO8ouE": 10099551,
- "0zExhHh7_Ic": 3261828,
- "1-5sTDLrcp4": 16458748,
- "1-9n4Upditg": 7601635,
- "1-AaLq7VS0s": 1970825,
- "1015d63VKh4": 3094822,
- "10LuSfZZa3E": 16054823,
- "10dTx1Zy_4w": 16870499,
- "11dNghWC4HI": 20346460,
- "11iYk0Yrx3g": 83684434,
- "1213qW5k55I": 3969099,
- "126N4hox9YA": 14405860,
- "12JdSg4pXIs": 63121187,
- "12Rvts2NR7M": 13670566,
- "12yg1R0RtSk": 10822544,
- "13E90TAtZ30": 19376189,
- "14-NdQwKz9w": 63550065,
- "145zOBT0LD4": 3544005,
- "14kScZR2iI4": 16651887,
- "15fz6Wo84IA": 8117925,
- "15s6B7K9paA": 2263465,
- "15zliAL4llE": 2960041,
- "16aKF_eDGdw": 3386107,
- "175ig2I9rt0": 9406878,
- "17a443nL7Qw": 1397216,
- "17jymDn0W6U": 147398316,
- "17pfZUlAqow": 25991364,
- "17st-s5gg10": 5792784,
- "19yOv4P2ccw": 3475581,
- "1AZnFszUroI": 16528223,
- "1AqkBdCBm9o": 3157982,
- "1B-0OIfyZvs": 24021408,
- "1BGlbx67B6s": 9079215,
- "1BH2TNzAAik": 1899828,
- "1CMDS4-PKKQ": 8991458,
- "1CxRVVGGNJU": 2436396,
- "1DcsREjyoiM": 5714613,
- "1DgDt6gCUKs": 2284264,
- "1DxZKAQ9WrM": 25117533,
- "1E3KGIr4eOo": 232673236,
- "1E3Z_R5AHdg": 5730239,
- "1Ex5II-jZzw": 18632890,
- "1F7LAJEVp-U": 5912881,
- "1FQPXtN7MeI": 15311036,
- "1HYSMxu-Dns": 8171340,
- "1JL5ZR-ocOs": 71470311,
- "1JT9oODsClE": 22847122,
- "1JudNLK1-Ck": 37664611,
- "1K5uvvz9c3M": 1761626,
- "1KL8HAm3uSY": 12812826,
- "1KwW1v__T_0": 6360275,
- "1LdFePZHAyY": 13121680,
- "1LxhXqD3_CE": 5486593,
- "1NjuXzHByN8": 20339099,
- "1O3F-b8FfDY": 11862173,
- "1OtzfP8fCNU": 8984542,
- "1PKOiYY9SPA": 92519577,
- "1POB_czE16k": 23094610,
- "1POuMECG_tw": 25779379,
- "1PsNIzUJPkc": 17957225,
- "1QihY-g20QA": 34911673,
- "1RxngIFOGas": 61571355,
- "1S4DtuMY88I": 7517190,
- "1Smz0zwAELQ": 4539763,
- "1TK8V_qmqrk": 5797542,
- "1UQ5IbihJNI": 9120193,
- "1V9wVmO0Tfg": 9483678,
- "1Vb8t7Y-pI0": 9363253,
- "1WOrgrIcQZU": 5787920,
- "1XnYL5xKk2M": 6435288,
- "1Y39f7MAL5I": 1363779,
- "1YYy0DEOpoU": 31354988,
- "1YlXtpF-19A": 10485564,
- "1_OieLuWGyw": 62128445,
- "1_ZAunahU7c": 53972978,
- "1_ymCFwbGGY": 3234158,
- "1aJBToJrlvA": 208377956,
- "1abpdO27KTo": 18103697,
- "1bj7FPzUiWc": 9150617,
- "1byR9UEQJN0": 3228782,
- "1c5HY3z4k8M": 3002811,
- "1ct7LUx23io": 6505952,
- "1dZsuE0vxEI": 11583306,
- "1exN1kFX2wI": 7125450,
- "1h-EUy0Bybg": 3504069,
- "1h4kW8RX-6k": 9715418,
- "1hihcoJPzz0": 2242772,
- "1iAxhc6EflI": 13410730,
- "1iSBNSYhvIU": 6309066,
- "1iTC9cBk6Ac": 37005404,
- "1iWdTbXvHx0": 76704957,
- "1irO3YeZcU4": 11798327,
- "1j5WnqwMdCk": 17284547,
- "1jDDfkKKgmc": 15991557,
- "1jLELrXiIxA": 33613363,
- "1jLifFl9HLA": 7281509,
- "1jWJQkxZiiU": 1147559,
- "1k-jqxMuUaM": 7130581,
- "1k6MUeM-pEo": 8471900,
- "1kEaBXshX90": 283267308,
- "1kbZ1JAoi5o": 4886924,
- "1kfq0aR3ASs": 2952462,
- "1lvyCZsP_Sw": 7243693,
- "1m9p9iubMLU": 6418953,
- "1mjyq51ppT8": 10460776,
- "1mnKCkmeaYs": 8291872,
- "1oFv56vSvvA": 2900802,
- "1og25U-d3_8": 7355680,
- "1op92ojA6q0": 2623543,
- "1p0NHR5w0Lc": 9688151,
- "1pHhMX0_4Bw": 2430397,
- "1q06qHX1K-I": 13331373,
- "1q3axPjwLrE": 8555172,
- "1qifvZnpKjU": 24821252,
- "1r0zOCtrAwo": 167075050,
- "1rUCyg4Ppso": 39990641,
- "1rXISOamWNw": 473639,
- "1reblXFlM6I": 3028346,
- "1s6G4iCiIHA": 24980473,
- "1t42z5U2uoc": 3437280,
- "1tvvSUySfls": 17232855,
- "1uWZNW5PF-s": 8047009,
- "1ul8g55dYA4": 8293015,
- "1v3btE3hES4": 21284178,
- "1wnIsgUivEQ": 3505324,
- "1wsF9GpGd00": 2796279,
- "1xQTlp0hscs": 83074638,
- "1xSQlwWGT8M": 21764462,
- "1xioYgUWsHg": 78515390,
- "1xuf6ZKF1_I": 7466169,
- "1yInzfzDDKY": 7473816,
- "2-nCSLMGwhI": 13302405,
- "2-oQA64myZQ": 284871318,
- "2-yaOVXG6rQ": 12946767,
- "20N53khArXA": 18997949,
- "20n0i2KQRCs": 22844235,
- "21680hPTfUc": 7765693,
- "21vbBiCVijE": 5440388,
- "223KLPnJCBI": 21142195,
- "22HqkuYT270": 8485517,
- "23GcWeVJMTQ": 28177473,
- "23I5GS4JiDg": 176579601,
- "2439OIVBgPg": 7625581,
- "24WMbh1BBKc": 5603111,
- "24YMQ9GvLss": 41545330,
- "25mxf_xUqDQ": 6816151,
- "26Rq8an37Q8": 16083568,
- "26WASJHF46A": 191442699,
- "26_SmkN7M_Y": 53556438,
- "27OStSo6OkA": 18078213,
- "27vT-NWuw0M": 13012981,
- "286FiUvOeFs": 16441269,
- "28N_IRo9g4Y": 7616381,
- "299o6c-Fkz4": 11303790,
- "29P6bar7nHc": 3700435,
- "2ArXbUhbikQ": 27938108,
- "2B4EBvVvf9w": 3643656,
- "2B68DWcOLj0": 17105294,
- "2BIFnNT69yU": 6332258,
- "2BgWWsypzLA": 5579948,
- "2Bq2xopLew8": 14146728,
- "2CZrkdtgeNU": 1532137,
- "2CrXoLt74iI": 6853501,
- "2CsQ_l1S2_Y": 6162898,
- "2DBBKArGfus": 26762251,
- "2DI_X16I4-s": 15863128,
- "2DPivVFCdqA": 4295718,
- "2DlxIXYEu4s": 18715393,
- "2DmYxB97KQ0": 4073947,
- "2DnQEaNTd08": 3492735,
- "2EJzrIKtKok": 18317264,
- "2E_DB5VuAoo": 10243166,
- "2EciWH-1ya4": 118100186,
- "2EwPpga_XPw": 5818464,
- "2EwTHdg-xgw": 10291741,
- "2GD1Oz0sPzY": 86195311,
- "2GD5PBK_Bto": 28016269,
- "2GQTfpDE9DQ": 20688339,
- "2G_Jr_XpnY4": 5425860,
- "2GrvBLKaRSI": 132934088,
- "2HIRaOQDRho": 3525254,
- "2IFItASxDVo": 2920986,
- "2IT6FcvBp_w": 142099983,
- "2IWhknVzeJM": 4642336,
- "2JxIjfqKTLs": 199732069,
- "2K1ekrZ6ej4": 17148379,
- "2MYA8Ba2PvM": 2246178,
- "2MzPOrcsWB0": 66656417,
- "2N62v_63SBo": 26638415,
- "2Pz_p8Tf24g": 125718717,
- "2QeDRsxSF9M": 16403517,
- "2QjdcVTgTTA": 6469941,
- "2RC3Hsk90t8": 168860430,
- "2REbsY4-S70": 17333995,
- "2RbKfRfzD-M": 8095644,
- "2RnS3fSHVV8": 14716783,
- "2SOK_IrpHeQ": 8494911,
- "2SQb-LzDaCY": 40701437,
- "2T6-eVRui1I": 25653652,
- "2TTu0TvB6N0": 57007158,
- "2UTr46btzaY": 3786955,
- "2UjfxAuXuSU": 22648310,
- "2VeqrZ_PMiY": 2947517,
- "2Vv9BhnE0SQ": 48441403,
- "2WEKGlvcVEw": 45841990,
- "2WS1sG9fhOk": 6760218,
- "2WjGD3LZEWo": 1356827,
- "2X3sLszx8bQ": 6595217,
- "2XQH-J5KeHI": 6617620,
- "2Xq2fZCs2oU": 24394199,
- "2ZSDevuR4UY": 11757337,
- "2ZgBJxT9pbU": 10272841,
- "2Zk6u7Uk5ow": 3410291,
- "2ZzuZvz33X0": 5382441,
- "2_IJz1ivopQ": 6749557,
- "2aUFB9hQncQ": 81363948,
- "2aiRpr5UCZs": 23002173,
- "2aobSX0xZEU": 22964523,
- "2axaRJQkfVk": 14431310,
- "2b7Qv5dtdf8": 9267620,
- "2b_BOHeEPJY": 49724111,
- "2cz2tH5vE1Q": 3466224,
- "2dZpQJSSSAs": 15074925,
- "2dbasvm3iG0": 5711958,
- "2duGAcN0nqw": 17017107,
- "2eLAEMRrR7Q": 11346708,
- "2eTTJMrINNo": 8401484,
- "2eTsa6Jx424": 11408021,
- "2ecG8NT43x0": 12302853,
- "2f7YwCtHcgk": 20457191,
- "2fijnNzktDI": 158563518,
- "2fzYE-Emar0": 11740506,
- "2h09oj26_H0": 28940432,
- "2h6RdAxIMO8": 7920464,
- "2h8XiqSnzaU": 1255035,
- "2hRIKH-Dca0": 14676122,
- "2jH_z9ra9L0": 5867466,
- "2jO--kC3aqk": 20714171,
- "2kSqB7y0NjU": 22088170,
- "2lXL4HscWGI": 53028921,
- "2mzuFKCuDg4": 1589021,
- "2nZsIeaiJUo": 4077600,
- "2o-Sef6wllg": 12981523,
- "2oGsLdAWxlk": 5207143,
- "2oHUkHYtQoM": 4625404,
- "2oJldeE4JcU": 5849598,
- "2oKVTTHA5u0": 11474331,
- "2pE7GUzW6-4": 18462717,
- "2pwnr_soZEU": 11577214,
- "2r95ZVqAysQ": 6139843,
- "2rjGj8xUKms": 25986832,
- "2s3aJfRr9gE": 19959711,
- "2t0003_sxtU": 6502311,
- "2tRcPpfjdKg": 12110842,
- "2tYdClfLSCE": 84252169,
- "2tyEjbFaXdA": 58968709,
- "2u535-HVJ_o": 9530646,
- "2uzDuGp0HQ0": 24438753,
- "2vSpWt7qC_M": 61816110,
- "2x8QgGgUTBM": 15214539,
- "2xFXOEa-xCk": 10268110,
- "2yjSAarzWF8": 3496936,
- "2zDhafJ2wqQ": 9075535,
- "2zS1HiuWPMA": 44123896,
- "2zfdtmlMNDs": 8535419,
- "3-aryZYsoxU": 6305975,
- "3-xfmbdzkqc": 20460317,
- "30o4omX5qfo": 49115917,
- "31_7PcU9YFc": 58616338,
- "3281cSAuk2g": 227402381,
- "32rdijPB-rA": 13597804,
- "33TYoybjqPg": 5279555,
- "35sOcVflhE0": 341509213,
- "368K0iQv8nE": 110928427,
- "36Rym2q4H94": 15223650,
- "36dg_h4gwNk": 10127554,
- "36v2EXZRzUE": 2082557,
- "3858MaULDdI": 6860640,
- "38gXbN1dVrg": 179234226,
- "391txUI76gM": 6786147,
- "39N5IKGfRmQ": 7399018,
- "3A-nAw2tY_4": 4512758,
- "3A305Mhtkug": 9914035,
- "3ACF7L-7Vsg": 2351072,
- "3AMENlm4pOw": 7222619,
- "3Ayt7mOd_To": 5016993,
- "3B-V_pG3HPQ": 200776274,
- "3B73j1tKkpI": 15864940,
- "3BBqL_F9fxQ": 227001587,
- "3CKpidALDEg": 5837048,
- "3CjCAeGhtHA": 17400431,
- "3Ee_huKclEQ": 2957290,
- "3Em2Zzn796Q": 34502283,
- "3FManXv4mZM": 4049775,
- "3GL69IA2q4s": 3127375,
- "3Gm4nAAc3zc": 13297787,
- "3HAMk_ZYO7g": 68358720,
- "3HD-Ak_a6VE": 3050475,
- "3HvIKsQb6es": 21132922,
- "3Iu1Z0h1i1Y": 116231657,
- "3JG3qn7-Sac": 8895022,
- "3JmnxR8nEi8": 6006480,
- "3JqIbemBlss": 2783853,
- "3KbEACrLCJU": 13921793,
- "3KjZ3w5MtBo": 11607165,
- "3KrqQXsWP1M": 5451538,
- "3Lawz8TcPig": 31653474,
- "3M4pu6YtzJU": 22950796,
- "3M8bwwafMxY": 239202064,
- "3Md5KCCQX-0": 22089458,
- "3NHSwiv_pSE": 3009373,
- "3NYhESueUfE": 34338309,
- "3NcIK0s3IwU": 5366225,
- "3OAfLjxQUg4": 84927685,
- "3OFH8OhpN08": 5385823,
- "3P-ILdjdipA": 45287405,
- "3P0fUHUaZcs": 31976511,
- "3Po3nfITsok": 15105229,
- "3QWJrPq_HB0": 10889714,
- "3RDytvJYehY": 22029786,
- "3ROWXs3jtQU": 14111664,
- "3SO1BQQ9_1E": 2105790,
- "3SgVUlEcOBU": 6046192,
- "3SmyaLwpSaI": 102135127,
- "3UAJS9jzyV4": 12170012,
- "3UcjojHetfE": 5877574,
- "3UiffIzCNPQ": 21599641,
- "3UlE8gyKbkU": 1494459,
- "3V4Dg6AmI6A": 15651467,
- "3X5JMS9_EK8": 278219872,
- "3X5UEYD94-M": 11730456,
- "3XOt1fjWKi8": 2138147,
- "3Xcae0OGavk": 1234151,
- "3XiHrsZNZko": 9184812,
- "3XymgBX-R2c": 109309996,
- "3YBXzMC9sDk": 30207272,
- "3YBirle0jII": 7230813,
- "3YMEIjHl9og": 81938426,
- "3Ya7I-oDGU0": 6066239,
- "3ZGmMTNyW0k": 21668339,
- "3ZdZ8VgyKnc": 20616038,
- "3ZhUdleD1lQ": 8505736,
- "3_-hYeuJTzQ": 46470641,
- "3_DxJwDTbyQ": 5706449,
- "3_W6bGuTfzU": 6303998,
- "3_caioiRu5I": 1109102,
- "3_otNr9kRuY": 1819127,
- "3aDV3L8aZtY": 6978363,
- "3c7kv8SkxTs": 32498270,
- "3cHxWUnde6E": 1769853,
- "3cVSSiuiwsQ": 8259604,
- "3cccLMqZlcI": 846900,
- "3ckdqEsQJaw": 62737919,
- "3cnIa0fYJkY": 5686241,
- "3eL_6VWexuk": 13639823,
- "3ebYvMC12HI": 189078769,
- "3euUrtzlnig": 229405062,
- "3fEIvVnGUcI": 77561012,
- "3g6P0lRXotI": 7482194,
- "3gNw_6DoVc8": 32041717,
- "3gPINuYv1T8": 32304947,
- "3gUE_P9T-Wk": 29002433,
- "3h4UK62Qrbo": 3366379,
- "3i8iou6tXqY": 68918108,
- "3iNCb7P_bdY": 18297797,
- "3ia-sGkAVf8": 7595808,
- "3jBfLaLrk6I": 746690,
- "3jf2l9ma6SM": 8070229,
- "3jvQrpVQaYM": 28889664,
- "3kQ_p2EZX4Q": 98696137,
- "3koOwozY4oc": 13156500,
- "3lHBgFvr3yE": 1256518,
- "3m-464MqBJY": 10294105,
- "3mUi9IZb4T4": 5880767,
- "3mier94pbnU": 5137674,
- "3mimxluSVBo": 5156356,
- "3motcx0GRck": 14737315,
- "3n0LvI99-KM": 6863256,
- "3n8UjH9h_8I": 14606712,
- "3nQejB-XPoY": 15534728,
- "3nbalsyibKU": 8858158,
- "3ntQz5vxFec": 91336488,
- "3o82OwR78wU": 6753846,
- "3o8_EARoMtg": 7866940,
- "3oG69aK0McM": 54705575,
- "3oeLGKeNPj0": 37020181,
- "3oznnP6SkSc": 114217756,
- "3pL2X-8-eVk": 11152134,
- "3pV4hcZgklE": 48262953,
- "3pu84BQVxK4": 176309803,
- "3qP8OOr7pfI": 3654948,
- "3quWEMobksw": 8822219,
- "3qwqSsLPb5Y": 15858533,
- "3rkDpqp-mw0": 14718373,
- "3rs7sFPoiZ4": 11651642,
- "3s-n4eFypPc": 20521142,
- "3sCB3udmu1Y": 77682678,
- "3szFVS5p_7A": 2577041,
- "3t1n5szXriQ": 23699938,
- "3tRc6mUumFk": 5755115,
- "3tmFTHOP6Pc": 2460207,
- "3tyM_M3FQNM": 5860632,
- "3tyrkxruz88": 29210150,
- "3u9Ux29MSXE": 8735822,
- "3uO_uPb9H8w": 7478709,
- "3uYb-RhM7lU": 8734368,
- "3v9w79NhsfI": 3499784,
- "3vKLU5_Hgco": 6796417,
- "3va4GU-TGGQ": 56638704,
- "3w_5eYUB6zY": 930771,
- "3xCzhdVtdMI": 7476201,
- "3xpZprWSn_0": 1659428,
- "3yBYXNW1Nls": 8263102,
- "3z-M6sbGIZ0": 8093970,
- "3zU90x0OZ0Y": 8140811,
- "4-LNrHGwtL0": 18834780,
- "4-_-wQc3EGE": 8580167,
- "4-fEvpVNTlE": 13025983,
- "405boztgZig": 2744408,
- "41DBE2mh5o8": 30360898,
- "42llTiRn-b8": 6244710,
- "43AS7bPUORc": 5485625,
- "43j2gGEP4JI": 2853683,
- "44ZkTayk2hk": 13628916,
- "457xnJv80O0": 12940346,
- "45qlm6cfHgg": 5057722,
- "462Y898PVn8": 56281640,
- "46CTJnzK23M": 31607878,
- "46V8qqVRirk": 8807623,
- "47JRs6hF_ic": 5498217,
- "47QgqdeSi0U": 110659809,
- "47_f2c-URn4": 12205181,
- "47wjId9k2Hs": 3407603,
- "497oIjqRPco": 1769401,
- "499MvHFrqUU": 3693606,
- "49LcF9Zf9TI": 11602440,
- "4AxZ-6MOznY": 8012261,
- "4Azskeheo_g": 5433954,
- "4BAGI6LbHeo": 77862505,
- "4BNIGTHUTTM": 5537948,
- "4Bc5-HRop5Y": 6206161,
- "4BtXvopHXI8": 1102526,
- "4Bx06GFyhUA": 3441397,
- "4CAQN-nc8Ac": 30358165,
- "4EJay-6Bioo": 9327356,
- "4ES_vbSJ7LU": 14655840,
- "4Eax48gDg9g": 668901,
- "4F6cFLnAAFc": 6089144,
- "4Flj9plmKGQ": 4234116,
- "4GUm8ybncWY": 17117978,
- "4GW-PORTvfo": 77286797,
- "4GcNzvILqtM": 2587598,
- "4HkbFUoX0iI": 64577612,
- "4HnyNMhkBs0": 4404999,
- "4I9iibPLdBw": 2189075,
- "4IWfJ7-CYfE": 4836785,
- "4I_5H5EetEE": 43238997,
- "4J-dRA3MGc8": 6989508,
- "4JqH55rLGKY": 3439697,
- "4L9dSZN5Nvg": 6946669,
- "4LSktB7Pk_c": 8195423,
- "4LYtLMmDuzw": 4033483,
- "4LmIyMyAuN0": 18052390,
- "4M62l7m1FJ4": 3881824,
- "4Mr7aEHQr8E": 24642589,
- "4NYF_Y3rTbk": 7808951,
- "4OEeVLo5V1o": 1983705,
- "4PCktDZJH8E": 16342991,
- "4PIn_9cxefI": 6957456,
- "4PPMnI8-Zsc": 8949299,
- "4PXkzcK-b4Y": 8311138,
- "4PlkCiEXBQI": 1855621,
- "4Q2oqG6S4Mk": 30890762,
- "4QwfrTNuwE4": 10466190,
- "4S9Bqo_LX7k": 145908067,
- "4SQDybFjhRE": 7794158,
- "4TBVB4hLQhY": 1566339,
- "4TuQ7YI-soQ": 30227204,
- "4VICS9cIugo": 32451380,
- "4VltXjR64SU": 15562979,
- "4VqHGULLA4o": 16308879,
- "4WIiConeatM": 32411316,
- "4WOjZ9lQdHE": 9612814,
- "4Xaa9WdXVTM": 6592216,
- "4Xgk3vusxT8": 7621658,
- "4Y2cY5YGxI4": 10226748,
- "4YUtnod-YuE": 14286238,
- "4Zxp2-_pLCE": 34322943,
- "4ZyTVTGVPgE": 2686086,
- "4_410pxikS0": 18705752,
- "4_xhiP6g2ow": 7276382,
- "4aNoZjAhSr8": 7131409,
- "4bZyfvKazzQ": 2750829,
- "4bilImPrYE0": 19538580,
- "4bmPvB15aYU": 22307869,
- "4dcGgUrkttY": 16033027,
- "4dpE80AU-oI": 182816340,
- "4eLJGG2Ad30": 5022038,
- "4eNX_xFt-sU": 128276739,
- "4eZpJo_60QQ": 7386620,
- "4fBXIcO0It4": 2253669,
- "4fQeHtSdw80": 4728309,
- "4gwbyfERDrA": 33005473,
- "4h54s7BBPpA": 1018637,
- "4htSVI5E9AQ": 8234012,
- "4j13InegUPk": 27504617,
- "4kA-IOFwUN4": 3927058,
- "4kIKySxUYuk": 12519350,
- "4kbv2Gaw-9U": 193363360,
- "4krPhLDbU5M": 260112137,
- "4lbVBMLZ1jQ": 12759414,
- "4mXv-Pa4CMM": 25187484,
- "4mdEsouIXGM": 87336600,
- "4mpFcaeElCs": 19408727,
- "4mrp5uI9anE": 64126992,
- "4n7TIvRHuDs": 3025801,
- "4nUq7ZMeueE": 239773515,
- "4o4P7KrkzXg": 5714380,
- "4oeoIOan_h4": 7564730,
- "4pj0MPnrEBQ": 65291864,
- "4qWdhOcTmeI": 18664645,
- "4qY9icExjEw": 87157048,
- "4qbb4f1I67k": 17604297,
- "4qdD4Ny34cc": 18186156,
- "4qfdCwys2ew": 17500607,
- "4qgOSBHptLM": 21912661,
- "4qoE3OVy4Vo": 7451460,
- "4r6QHJzu8YQ": 7683592,
- "4roG0EhmyDw": 25174983,
- "4rsswT_Rv1M": 14784060,
- "4smVBLi3DxU": 2517501,
- "4tLrbMstfm8": 11568439,
- "4tWFdI7DkJ4": 6462680,
- "4tcLzVJdxZs": 16702596,
- "4tctB1wZNiI": 8238662,
- "4tsjCND2ZfM": 72956784,
- "4uQtJDf7drU": 5411475,
- "4vNloi-zNjU": 1950498,
- "4ve7OaCnDLs": 1720219,
- "4vuybxJvRuA": 296310701,
- "4xBwJoi53hk": 37935776,
- "4xFIi0JF2AM": 6703179,
- "4xOsAuj0QZg": 16449285,
- "4xfOq00BzJA": 4036245,
- "4xtXBsYENzg": 359079445,
- "4y1puNyB9e8": 266336232,
- "4ywTWCaLmXE": 5890251,
- "4yyLfrsSXQQ": 7577639,
- "4zKjzl0futI": 5950240,
- "4ztQjBGbecw": 18352202,
- "5-2RZsU8e3U": 29372654,
- "5-MM39VCwc0": 11166578,
- "5-McqAO8_Qw": 17879824,
- "5-ZFOhHQS68": 6958058,
- "51-U-Jkq79A": 1900506,
- "51UA1T89MzU": 243349854,
- "52ZlXsFJULI": 7498685,
- "52wxpYnS64U": 7815999,
- "53zzt2SVde4": 39008170,
- "54--44LhQRU": 17792409,
- "542CMooowNY": 9677093,
- "54JkvkIT0Dc": 262480288,
- "54c_oPpTTP8": 7167545,
- "55G8037gsKY": 8884996,
- "56tSt0TpnAk": 25709536,
- "57BiI_iD3-U": 11453546,
- "57gz50uTPqM": 6194165,
- "57pvSMQ0E5M": 30787920,
- "595Tiga1gIg": 7222566,
- "59UeshgSuEE": 9446245,
- "59XYyyia1Fk": 22620359,
- "5A7hSaoRv0g": 32013668,
- "5ABpqVSx33I": 5218454,
- "5AIBur4AVrE": 17525256,
- "5AWob_z74Ks": 27252910,
- "5B1i26dUwME": 9087900,
- "5B8XluiqdHM": 18428438,
- "5BEaqN92vDk": 7326738,
- "5CBs36jtZxY": 31396682,
- "5CeBlu260Rw": 3962388,
- "5Cqbf86jTro": 37340460,
- "5D1gV37bKXY": 4690898,
- "5Dh-gvGdMn8": 82990716,
- "5DlzmolR8Cg": 1592903,
- "5EU-y1VF7g4": 18943852,
- "5EWjlpc0S00": 7989412,
- "5EdbPz1ZVn0": 9878966,
- "5FBDqY41GjU": 1993614,
- "5FEjrStgcF8": 29592520,
- "5Fa8U6BkhNo": 17829472,
- "5GOhM3jq9Fc": 7277419,
- "5HMMfiyszjo": 7192828,
- "5HNMcuseBfk": 56805350,
- "5HVCFrXQ9pw": 15345657,
- "5HgzsltWwK8": 14426112,
- "5I9dH5im24U": 33670317,
- "5Ixp_0r5YWk": 6190750,
- "5JuDBwB28_w": 23940212,
- "5K8U9QOj_TE": 13240251,
- "5LMzbgfZ8cA": 3345632,
- "5LqNm9d2__I": 22133849,
- "5M0vOHFm3Ww": 52975686,
- "5MA0NQObHUk": 90564358,
- "5MOn8X-tyFw": 39094269,
- "5MUAgzSUHRc": 6779383,
- "5MoIg5lWLXA": 14920009,
- "5NjgcPri07E": 5831662,
- "5OEZTU8FdVA": 223742755,
- "5OYIXxNz6Xk": 2100529,
- "5PmSbASb1yY": 181202232,
- "5RL64wceWGI": 38308564,
- "5RRyX9mI5Lw": 11580151,
- "5RXRr8PKunk": 8187641,
- "5RzDVNob0-0": 1939925,
- "5S03uylNn-Q": 10149153,
- "5SHOKpT2bwg": 73205509,
- "5SO58NndlPI": 34226571,
- "5TtB1_Zfatc": 11888848,
- "5U2XAJNazik": 4085355,
- "5UUa0V-MAqI": 3813675,
- "5UVpLPtgdF4": 10375418,
- "5WEX0J8hEHM": 7919639,
- "5YEGpb7tXOo": 12559542,
- "5YaSL-y46Hk": 6987227,
- "5YfO4CshL7Y": 4836697,
- "5ZCKr4wTQvI": 835965,
- "5ZGCqKAl_CA": 10482361,
- "5ZMHdtGySvI": 5065463,
- "5ZXB-gCs1oM": 39137093,
- "5ZdxnFspyP8": 1584494,
- "5_4xmCLmtb8": 16742440,
- "5_6m0I1BUp4": 250363994,
- "5a6zpfl50go": 6492218,
- "5ahti9i1eFM": 15453592,
- "5b4rP0DKd_k": 14402754,
- "5bWxTfRZx70": 13074840,
- "5brsc8IbWSk": 11434681,
- "5c9N_1PEfHw": 31299607,
- "5cK86VKoBPw": 4350469,
- "5coSaLCWzhA": 3834567,
- "5ctsUsvIp8w": 2189636,
- "5d63YMUxcS4": 5946923,
- "5dlE_wobLoM": 104879481,
- "5fBYs63b0mk": 61029396,
- "5fK8HEYNRuQ": 5641505,
- "5fkh01mClLU": 14228377,
- "5flvVD_tnRw": 210173030,
- "5hM8xUB07Y0": 18748759,
- "5i8HLmVTcRQ": 2034136,
- "5iUh_CSjaSw": 248248708,
- "5j81gyHn9i0": 4160654,
- "5jwXThH6fg4": 2401349,
- "5kFnAmmGXM4": 4825552,
- "5kpVQqV7EV8": 2629575,
- "5lXw5_4R2B4": 4202973,
- "5lmHzAHbtzg": 4422148,
- "5mNTvtjDnP8": 14466261,
- "5qWI2pEv0wg": 10183790,
- "5qfOViJda_g": 876698,
- "5qgtWunYHwQ": 17593937,
- "5r2FYszC_sU": 2244299,
- "5tXV-8-6tw0": 8330375,
- "5u1Nrmdyd-A": 19301737,
- "5u2pDR634Fw": 10552279,
- "5uKGX1lt6ZY": 31956260,
- "5ui43_O0RVQ": 44211498,
- "5uuQ77vAV_U": 106148264,
- "5vJbhxYchPQ": 42403314,
- "5wUJLMWZ5Fw": 3746263,
- "5wptm7lPZyE": 102901519,
- "5xSEZszGDtI": 24218989,
- "5xe-6GPR_qQ": 2572925,
- "5xp9lI_fXDo": 47193533,
- "5yQlaMy4T2w": 305740304,
- "5z568fLBQyQ": 1740749,
- "5zosU6XTgSY": 15426012,
- "607Buvyc0VI": 5577679,
- "60u_ctp6UIw": 43854974,
- "61ecnr8m04U": 4670240,
- "62NoiGwZmd4": 1502568,
- "62ZlRO8BCUw": 57541747,
- "62zKxexJrIM": 8906566,
- "632MAqIB14E": 8522735,
- "63mWxNXQQAk": 12809199,
- "63yYbOnJt-o": 39479477,
- "640-86yn2wM": 1783122,
- "64GBYOsI9jQ": 288520776,
- "64_ZfIemRGM": 26194794,
- "64bH_27Ehoc": 9587957,
- "653ZKHd_PYo": 30650797,
- "65Xr4AdAY2A": 75275788,
- "65y1SKgRtOc": 13676517,
- "662koqcIXSk": 17322200,
- "66pQLO--Ghk": 10730245,
- "67YpFYOmmQo": 11414463,
- "67jn5Zv-myg": 6430407,
- "68MakfeY8z8": 15304674,
- "69V-60sga3M": 5824146,
- "69rDtSpshAw": 3739300,
- "6A1QWaP7cBo": 25760596,
- "6BR0Q5e74bs": 8437936,
- "6CFE60iP2Ug": 15820557,
- "6CUcgUeQS-w": 3480178,
- "6DE6PNg58tM": 10838081,
- "6D_yOm6bjkw": 79463568,
- "6DpzCKJBsz0": 20317018,
- "6EY0E3z-hsU": 9662977,
- "6EdsBabSZ4g": 42905930,
- "6ElH8dKuAsY": 5676520,
- "6F32MMvcDNs": 215854437,
- "6FL81EVJTUE": 59597514,
- "6FP-hLuAlr4": 3404726,
- "6FTiHeius1c": 6101868,
- "6FrPLJY0rqM": 12837955,
- "6G1MQi2VFMI": 14680493,
- "6G1evL7ELwE": 13437791,
- "6GB_kcdVMQo": 44483946,
- "6HMYQfI76fQ": 8460193,
- "6HTBjvqn9uw": 54184330,
- "6JFzI1DDyyk": 10158007,
- "6JQNEww5DF8": 1310186,
- "6KmeGpjeLZ0": 9366836,
- "6Kw2nIwWYL0": 7195777,
- "6LurHwFfrIA": 16421032,
- "6Ng8ayarWHw": 17116039,
- "6NrTrBzC6dk": 127027107,
- "6OFwfxmhtE8": 2519441,
- "6Ofbt16AJgg": 11431313,
- "6Og8EvH_2mY": 138529054,
- "6OvhLPS7rj4": 4778383,
- "6Ozz3J-LRrY": 3901633,
- "6P2bsPWCRvM": 26231004,
- "6PZYYIaB0UY": 298816067,
- "6PjBb-r54A8": 13297452,
- "6QJtWfIiyZo": 7515935,
- "6QZCj4O9sk0": 3699041,
- "6Qr99-l1Oos": 845715304,
- "6RKMRBxDm20": 11027696,
- "6RpVjF4N8nY": 17384329,
- "6Rp_av9kLPM": 27554025,
- "6Sy4E_8Psos": 11848328,
- "6TxlqANDjKM": 3165114,
- "6U9f8Q3Y_SY": 14302722,
- "6UqtgH_Zy1Y": 9297781,
- "6V9x0d5wRpI": 5688205,
- "6WCfVjUTTEY": 9956924,
- "6WMZ7J0wwMI": 6113804,
- "6XOm3Km7r30": 10360498,
- "6YRGEsQWZzY": 6578984,
- "6YU9HVS2GT0": 15752852,
- "6YY3OOPmUDA": 25563499,
- "6YYiiixYz9A": 1169884,
- "6_9xNMtwnfs": 3829373,
- "6_PP49FuyTM": 3276378,
- "6agzj3A9IgA": 4663455,
- "6bQ6HJsAv4A": 1768797,
- "6bpoes4E8Vs": 45069757,
- "6brUGBR6ll0": 23136349,
- "6bsWW4Ke_Hs": 102831185,
- "6bsu9w9iIQY": 22524023,
- "6c8BCZd6GXU": 41439997,
- "6crKuLMj_b4": 169730056,
- "6d97X9sE4MQ": 18535505,
- "6dIMIBO_2mc": 3452090,
- "6dP-mNDnU-A": 6096402,
- "6dWHPHELCKU": 130151192,
- "6dyWKD_JPhI": 3263943,
- "6e0LyXQJoW4": 3683715,
- "6f553BGaufI": 18260872,
- "6fHorNn2zqQ": 42603959,
- "6fQipZcvNFg": 14180905,
- "6fjkb3FThrg": 21776102,
- "6g3DPg2HqGw": 16242698,
- "6gUY5NoX1Lk": 24065207,
- "6gV_k7ACbY8": 20121492,
- "6hFiTU77Sm0": 27677660,
- "6hRAK7QyxPc": 16746864,
- "6hri9k_2R8o": 4460155,
- "6i3EmBNYptk": 22734382,
- "6jqx5uEBs5U": 6423368,
- "6kGi1dvGZNY": 6823806,
- "6kUUJJV_MNA": 75373034,
- "6lH7zWK_SAg": 31343886,
- "6m642-2D3V4": 4464383,
- "6mp-fBJNQmU": 85031378,
- "6n0yxfWNFR4": 3697194,
- "6nUMiJfHLSA": 23001070,
- "6nVysrZQnOQ": 16000638,
- "6nZp2QGeQ9k": 952185,
- "6o7b9yyhH7k": 13042611,
- "6owqvwty_UQ": 31274953,
- "6p1lweGactg": 3504300,
- "6phoVfGKKec": 3224435,
- "6px4rzfC6jY": 67522651,
- "6q8mk7z72AU": 4227959,
- "6rwoktPmqpY": 179183564,
- "6s1CI3uuhko": 2839740,
- "6sP3kV-zgZk": 14359648,
- "6t9ogglXNIM": 12456046,
- "6u6uDIKWZgU": 16618021,
- "6uNYe9UB3K4": 17328350,
- "6uPl2ytYhjI": 4879814,
- "6udRtn5jSWk": 11501780,
- "6unzbhlxXxM": 4424966,
- "6vDwG_rz_PU": 19380954,
- "6vRgqB0PSXE": 966703,
- "6vlBOHckmzU": 13575910,
- "6vy5CX6vK0I": 33652985,
- "6w2E8G0sEPc": 105978836,
- "6xEO4BeawzA": 8024264,
- "6xPkG2pA-TU": 10116303,
- "6xx5v3PKZZM": 44169378,
- "6xy02bQS2Zg": 8642011,
- "6y5oO6NfGHw": 186422175,
- "6ycEasF48zI": 3653885,
- "6ynr9N-NQ8E": 3228446,
- "6yrPU8rYOhs": 22864229,
- "6zV3JEjLoyE": 8062364,
- "6zWPgvEMVlE": 5520850,
- "6z_Kjsn8VLI": 177076137,
- "70aWb6xBrbg": 13280222,
- "70tpqg58Oug": 27321722,
- "711pdW8TbbY": 12704854,
- "71L7-dyQsoQ": 64767203,
- "72FUrRxXCpQ": 28038351,
- "72p6uw5y-Rw": 3752975,
- "73eSiVcg4tQ": 9644831,
- "73yFDlgqPio": 193571484,
- "74XxAsDmUaM": 1904908,
- "74oju-0NExU": 10054423,
- "765X_PAxhAw": 1995136,
- "76KtDSfWnkw": 9166111,
- "76O8KpO_4Zw": 7989415,
- "76gw8PA12ag": 10026119,
- "77CApfQlTuE": 5745526,
- "77KwjG79Dxw": 73138341,
- "77_wq8yFEf8": 206250181,
- "77mjvRkfqW4": 210408857,
- "789aMeepbxI": 4154595,
- "78tnNYNISOc": 5977243,
- "79NnsYrAXz4": 10711410,
- "79OmpES_9OE": 12503120,
- "79duxPXpyKQ": 16965659,
- "79lagkER9qY": 9538117,
- "79ngr0Bur38": 1544534,
- "7AOOlxbZN3E": 32837617,
- "7BEbEZstN_k": 184673340,
- "7BFx8pt2aTQ": 13883927,
- "7BgiKyvviyU": 7153386,
- "7BkcNLOf56w": 8600498,
- "7Bxp98ChqT0": 1409257,
- "7C7do85sfXA": 59823252,
- "7CXN56zbqBM": 17691740,
- "7CmbItRjM-Y": 22198077,
- "7CqigPmXyv8": 92517035,
- "7D6urvlVjJ4": 106226254,
- "7DtWXEPB_AI": 1344882,
- "7FN1NBoV2u0": 26988578,
- "7FQWBCeVIJM": 8211239,
- "7FTNWE7RTfQ": 5440016,
- "7Fxt6E7m7bM": 17487565,
- "7G4BUm7M6MY": 7838383,
- "7GEUgRcnfVE": 31490504,
- "7GV1UZSTNJg": 15669697,
- "7HBDLYdyJnc": 5028158,
- "7HTy-6NLWGM": 27424068,
- "7HUYGoJ2bD0": 231409087,
- "7He7goTp6BY": 12594695,
- "7I42-iVCVNQ": 151881722,
- "7Ig6kVZaWoU": 4223271,
- "7IkufOBIw5g": 8438692,
- "7JPIX3odZrY": 7230418,
- "7K2icszdxQc": 25246459,
- "7LpTDxGZ05o": 88299146,
- "7MKA2QlKvHc": 21016727,
- "7MjHWw3p710": 3797205,
- "7Mo4S2wyMg4": 20820653,
- "7NbzVvgDyqw": 136528199,
- "7PgYb0c_3KE": 92712961,
- "7PsgPJoGWig": 107617329,
- "7QMoNY6FzvM": 2445234,
- "7S1MLJOG-5A": 2375317,
- "7SnmUoVhYqw": 9617855,
- "7TafYJLjhY4": 17487641,
- "7UISwx2Mr4c": 6270262,
- "7Un_Uu_sACI": 17201299,
- "7Uos1ED3KHI": 14461750,
- "7UsYHo5iarM": 10555291,
- "7VJ_8jNaL-Y": 10720500,
- "7WXijfIZh64": 4788629,
- "7Wd3N8hFfDk": 26271954,
- "7WloKabLhII": 2644768,
- "7X1_3i9DimY": 278282256,
- "7XaftdE_h60": 18699499,
- "7Zin8hG9Nhw": 17003502,
- "7ZwSd9gtnwI": 1276705,
- "7_QPAdHILzw": 3804272,
- "7aGEvpHaNJ8": 7495198,
- "7aur5h44pV4": 12366260,
- "7b6LRebCgb4": 15824496,
- "7bO0TmJ6Ba4": 8875984,
- "7beFNpp4FxY": 104676044,
- "7cmv1cEfHto": 146059791,
- "7d6S8y2kYSg": 55686710,
- "7eutept5h0Q": 14430356,
- "7f-LsuAnLMA": 17913055,
- "7fztCjCfhZQ": 3793854,
- "7hCsQOKOYS8": 3586760,
- "7iGjiSbEp9c": 61666938,
- "7iWHIx3kwPc": 66711639,
- "7j6HcztlLdw": 10716607,
- "7jzCJJIc59E": 130038160,
- "7m0u6dxA5Xo": 11012427,
- "7nKXXKn6jL8": 11971434,
- "7oBUIo5R5qg": 157360346,
- "7p2qfyqiXHc": 12028747,
- "7pqZj-83BuI": 2275714,
- "7qAld9bGwlA": 5484200,
- "7qaxUhbiQUc": 87565634,
- "7r1yZxhGOcc": 49412311,
- "7rIFO8hct9g": 15938175,
- "7rkx7B990HI": 14122899,
- "7rrSuhFC7I0": 6452434,
- "7sQCcGlK2bY": 7717204,
- "7sfGMAOeN9E": 55401961,
- "7siSvYs84fg": 4372413,
- "7t8gdc3YogM": 7292794,
- "7u2MkbsE_dw": 79797810,
- "7uFbPec0tR4": 45311518,
- "7udSVZ7bDb8": 22833060,
- "7unYHC6YrMs": 21845308,
- "7vHh1sfZ5KE": 7854680,
- "7vWzd-ZV6-Q": 2999338,
- "7ww5T7hCdn4": 26970095,
- "7yaNXogaFMM": 134143811,
- "7ym7FWyCzKI": 148363803,
- "7ynX_F-SwNY": 22986059,
- "7zBqVOuEKYE": 4138128,
- "7zk0ubr_lzo": 17473931,
- "7zq3s3F5Do8": 8147066,
- "8-5DTsl1V5k": 116985236,
- "8-ccnvn9DxI": 18644679,
- "8183HPmA2_I": 18887823,
- "81SseQCpGws": 4201505,
- "84NkvxfMPtM": 2242044,
- "85zGYB-34jQ": 12114024,
- "86NwKBcOlow": 5107217,
- "86iNZaZ0S84": 14461350,
- "86nb02Bx_5w": 13793783,
- "87-DnbQatO8": 102473040,
- "87QlGDfXh54": 42681434,
- "87_qIofPwhg": 12679565,
- "884SpJ-22Bc": 2128913,
- "89xjsBW9AAI": 40275781,
- "8AkQvv-uceg": 2241932,
- "8Amgakx5aII": 6379329,
- "8AwKNC1texM": 12940774,
- "8BCcfgQPYlI": 23428226,
- "8C5kAIKLcZo": 5300816,
- "8CJ6Qdcoxsc": 3678729,
- "8CluknrLeys": 27380335,
- "8Eb5MWwcMMY": 1621094,
- "8EmhGOQ-DNQ": 204769690,
- "8Ft5iHhauJ0": 9028751,
- "8G0RkfeKfBg": 8492282,
- "8G5WFKUzvA8": 9380472,
- "8GQvMt-ow4w": 38183333,
- "8GhjZn2W8ns": 106086401,
- "8HSeHRGihkY": 29195088,
- "8HlVy__J8XA": 21099685,
- "8IR5LefXVPY": 8562767,
- "8I_KtODUekU": 8524984,
- "8In5PK1yUAA": 5308205,
- "8JYP_wU1JTU": 22807571,
- "8JyPzTeA_8w": 3216683,
- "8KXWJCmshEE": 4557767,
- "8Ld8Csu4sEs": 10155631,
- "8M4c8TB3Cdc": 9970364,
- "8NJEeEUUhaI": 13439131,
- "8OCjwBkMJ_E": 9330144,
- "8OHEgD6YMBw": 3897956,
- "8OKTrN0uT-Q": 7522093,
- "8Otn9DVkm-g": 10215899,
- "8PPM8foaH_k": 73256592,
- "8QYiN--_4-c": 13339325,
- "8QihetGj3pg": 7043301,
- "8RSTQl0bQuw": 4708055,
- "8RasCV_Lggg": 9698712,
- "8Ryfe82DTcM": 8368627,
- "8SAMey9Gl5I": 26612726,
- "8SsC5st4LnI": 14135011,
- "8T4F7WboWPQ": 3334773,
- "8TIben0bJpU": 7112473,
- "8TPofjGXDR4": 3503799,
- "8ToCxaB7EOE": 4370672,
- "8TqFGD9tZto": 30202829,
- "8U8egQjcPaI": 9664826,
- "8VOcnNekTjw": 75761482,
- "8VgmBe3ulb8": 10715628,
- "8VjhtS3KlOY": 14297274,
- "8W0iZk8Yxhs": 2422630,
- "8WkUjPz0nQQ": 114244180,
- "8WmVmmPkpTM": 36995315,
- "8Wxw9bpKEGQ": 2592549,
- "8X1AS9qD5AQ": 9400437,
- "8X7yEzgurP8": 11242010,
- "8XCugIQXK-s": 14767662,
- "8XKFcz7zP5E": 93986871,
- "8XMXDUa8dcY": 133548496,
- "8XoQH1MVLew": 7403741,
- "8Xx-JlsX_Ww": 25886663,
- "8Y-snjheI9M": 4494060,
- "8Y4JSp5U82I": 6797260,
- "8YBQQ0GeusM": 9329339,
- "8YR1E7XWPz8": 3776055,
- "8Yl_u_Otcjg": 3533291,
- "8ZlH2JswO3Q": 166441867,
- "8_fT1BsTmt4": 2715275,
- "8a1a5A3CfdQ": 6243517,
- "8aeivxR1GDc": 9017764,
- "8bCL8TQZFKo": 16938058,
- "8bK-xfh8-rY": 9667590,
- "8dMLK2Wueaw": 7498202,
- "8dQdfbE8kFU": 37723295,
- "8exiUQAiw3w": 13499625,
- "8fxilNdEQTo": 11471220,
- "8gX_LBv4ZD0": 14504963,
- "8gnpnUFNloo": 29956661,
- "8hcanS-j8Ho": 5049073,
- "8i0j3j16yFk": 6069004,
- "8iKsY8C5VW8": 14302408,
- "8iwauKeqm2w": 10880199,
- "8jFxkEQacVA": 109929385,
- "8jV1SwpZ-W4": 29281647,
- "8lUB2sAQkzw": 84032745,
- "8mAZYv5wIcE": 22869384,
- "8mcTsyV56jI": 6196391,
- "8mvUDiBQbjg": 15996986,
- "8n4nne9FQFo": 15977383,
- "8nW9L7cSop4": 5320399,
- "8nod8JWaO1o": 7416708,
- "8p6R5yJjAGE": 12352501,
- "8pSBIydZULc": 33206180,
- "8qfzpJvsp04": 11136844,
- "8r8Vp_1iB4k": 4722964,
- "8shz0KfqkMo": 10388599,
- "8sz1IPjBRS8": 5940456,
- "8t-Un7yH99g": 7610029,
- "8u6gNH6xIfc": 233896476,
- "8uLzMKrO1FU": 13290183,
- "8wIodo1HD4Y": 12061795,
- "8wYvKeSK1IY": 9179799,
- "8x1-TeDxblU": 16588618,
- "8x8tA4YPhJw": 13435438,
- "8xWSyUrYc0w": 19936664,
- "8xbIS2UkQxI": 3762980,
- "8y7xP4zz0UY": 3159871,
- "8zOtrD8QMEc": 37662022,
- "8zgvzmKZ5vo": 18684809,
- "8zrJxuVW3u4": 53088868,
- "9-9_v1wSPBQ": 10123212,
- "9-PYxR59H_g": 13230443,
- "9-u4zP5s9is": 91834895,
- "913Pj5AxmHQ": 12355766,
- "91eJReL13Hc": 14981602,
- "91qVGeyTl44": 4854427,
- "91wF7Ef_k8Y": 18283934,
- "91x5bPf2Eag": 115508715,
- "920PtNX-WCE": 25083636,
- "92U67CUy9Gc": 8614660,
- "92aLiyeQj0w": 6337747,
- "947j2zXm8WA": 16041938,
- "94Gnto5G1PU": 9773731,
- "94xKRkCHlv0": 28353864,
- "95logvV8nXY": 4576374,
- "95tChNVzodY": 9544568,
- "96ZEmUbnuU8": 4620110,
- "96uHMcHWD2E": 8971099,
- "978yjrvshH0": 9940472,
- "97FwcpMIUuY": 310210611,
- "97POZGcfoY8": 13784945,
- "97nFwkRiNCc": 12049061,
- "983Tu9rlP54": 177171132,
- "98qfFzqDKR8": 17058435,
- "99hAYY4usME": 66276727,
- "99pD1-6ZpuM": 20705601,
- "99v51U3HSCU": 5347985,
- "9A8wM1UMLyo": 10030454,
- "9ASWQi14FlE": 10249739,
- "9AoDucUmO20": 7401629,
- "9B8voIQl8BI": 24427124,
- "9BNkmfHYYYI": 16431461,
- "9BUDq62Ghic": 55402230,
- "9CZfG3r5JBE": 1908795,
- "9CzYnHVFsuk": 13943410,
- "9DGbDx5xQNo": 16885175,
- "9DM1S2TXi_M": 15205524,
- "9DxrF6Ttws4": 11860687,
- "9E1cA3j_xY8": 23259504,
- "9EZuhlSNUv0": 19096528,
- "9Ek61w1LxSc": 8578901,
- "9FC0WT186aY": 2345870,
- "9G0w61pZPig": 10931699,
- "9GPuoukU8fM": 16977720,
- "9IUEk9fn2Vs": 5911695,
- "9IZhzUDSBTY": 4849179,
- "9JX2s90_RNQ": 11287734,
- "9JcpyE01Yzc": 25096039,
- "9Jg5S7F2SMQ": 1646486,
- "9K3R6xtO6SU": 10985389,
- "9KR1bad76qg": 5155526,
- "9M-B5qU7ezY": 12364573,
- "9McJ3GobPaY": 4807621,
- "9MuGkAjFGzA": 2621718,
- "9NVQsQLPOqc": 67539347,
- "9Ng6Zv9oLzk": 8458080,
- "9ODhKqFaugQ": 105711359,
- "9P80OLC6wKY": 521987,
- "9QduzzW10uA": 9768082,
- "9R9vPcPyUwo": 82825665,
- "9REPnibO4IQ": 12382416,
- "9RYCKd6Ac2U": 15470720,
- "9SOSfRNCQZQ": 3408680,
- "9T3AAn-Cw3g": 1698335,
- "9T6ZPYYu_Dk": 7130292,
- "9TXArCzLTuc": 5149919,
- "9ThXDY9Y3oU": 8596137,
- "9UBZchwb2KI": 5485295,
- "9UVgO8zS474": 1636925,
- "9UhChwcVWq8": 8845877,
- "9V1bipPkCTU": 7822576,
- "9VZsMY15xeU": 6669488,
- "9VqL6POWIoc": 1628029,
- "9Wb-T1F033Q": 272326950,
- "9Wfn-WWV1aY": 5581687,
- "9XZypM2Z3Ro": 5377045,
- "9Xncz_mMc5g": 7779404,
- "9Y-7wohhcSU": 8233495,
- "9YRw0Yk7N8c": 45472162,
- "9YjXGLWMvCM": 1095241,
- "9YrS35wxE7o": 6186819,
- "9YyLwzJunGw": 1648744,
- "9ZnvDzfMRps": 33994774,
- "9_-YqgZs6vI": 323885141,
- "9_3OxtdqmqE": 3775559,
- "9_VCk9tWT0Y": 4987979,
- "9b8qZ6OHZ5s": 19239915,
- "9bE-n0n2BBA": 30335767,
- "9bHm8_kq3DA": 16002441,
- "9bWJt2hjBH0": 112988544,
- "9bfDEsz7eSM": 8796313,
- "9bs1iQ14LJY": 39903782,
- "9bwy85M1Zxg": 3619956,
- "9cZDuVVPkTU": 15845050,
- "9dS7bc_2bUE": 15564562,
- "9dbb6oITDa0": 77606975,
- "9e9GWdT2pEQ": 45423270,
- "9eSPhvhuInw": 19320738,
- "9eWyvWq9CCs": 15415942,
- "9fEublFSTOg": 59403811,
- "9fiJ7mSzamw": 59102493,
- "9g-r2007Y8c": 141138597,
- "9gPTOKcwp3c": 56152536,
- "9gnM72T4DTE": 75211580,
- "9h3IjkVNKYA": 13641434,
- "9hM32lsQ4aI": 1866645,
- "9hryH94KFJA": 8529619,
- "9iaYNaENVH4": 13332756,
- "9iqN12hCn10": 5825628,
- "9iulv2QvKwo": 1630197,
- "9k97m8oWnaY": 29855428,
- "9kW6zFK5E5c": 18380690,
- "9lIxelNVmNU": 36500637,
- "9mU3MVtsqic": 2120655,
- "9nH3A4riVxs": 2966253,
- "9onC3FwiQeg": 236289326,
- "9p10aMu1Glo": 10467299,
- "9p3HNMe-oAI": 8576285,
- "9pRzyioUKp0": 88109912,
- "9pcWAHujSZA": 494617754,
- "9qEaVwIXqR4": 8134898,
- "9r8Wb7prWZA": 8270689,
- "9rrEHyBZ5MU": 28582178,
- "9s9pkVZD-Iw": 47112444,
- "9slylqZ1MOk": 93352149,
- "9tEnXUuHkp4": 9061388,
- "9tmtDBpqq9s": 1513284,
- "9uOF3AZI_Gc": 56453030,
- "9uwLgf84p5w": 3672981,
- "9uxvm-USEYE": 3286991,
- "9vI1kP-9zpw": 9675156,
- "9vlsBN3pFE0": 8496091,
- "9wOalujeZf4": 10649951,
- "9wXdONpguLw": 2483861,
- "9wYbsSrDwbA": 18883914,
- "9wguQaBYKec": 77434533,
- "9wmvZH5lX_U": 2274444,
- "9x1vnGfIE8k": 321694300,
- "9xwAPXM0Flg": 10073300,
- "9ylUcCOTH8Y": 4905185,
- "9zY5dhi6IZY": 8773053,
- "9zoS5WGsmpc": 37730071,
- "9zspW8u6kQM": 7315346,
- "A-Q79HlORtM": 67222240,
- "A-YEtgZPcFc": 134283224,
- "A-ykhY_IoaU": 5372333,
- "A00qfA9bE84": 21437085,
- "A0sp7I9rlz8": 20112584,
- "A11AfJ2-3rE": 6037790,
- "A1XyF5clLbI": 13490213,
- "A2fB3JOH9rQ": 3062486,
- "A3vkqYgJ93c": 88120917,
- "A3xPhzs-KBI": 9941547,
- "A44_Sqifi0U": 16803631,
- "A4Pp0rYV2kg": 127226404,
- "A52fEdPn9lg": 10761678,
- "A57_63yP1UU": 6259750,
- "A5lggKwX4Zw": 4608980,
- "A5r7wkwDID4": 7715319,
- "A6FP-2d3GnQ": 8973005,
- "A6fbDssPeac": 15429294,
- "A7zPgMV4eTM": 4209251,
- "A8GQfq3U96M": 91393184,
- "A8ZK4VWmbGc": 28656657,
- "A8xO92u0VFs": 6150093,
- "A90HKrgUOg0": 46954248,
- "A9Km337z15k": 25867163,
- "AA6RfgP-AHU": 9830663,
- "AAWsuFXojgo": 6891872,
- "AAmVITyDXbc": 13921178,
- "ABUzqfD8vWg": 2705217,
- "ABhqENOxSrU": 89923848,
- "AC_kjcuHpZw": 11375080,
- "ACxH7ZVUOLk": 71938736,
- "AD3-v1oKjSk": 86205158,
- "AE1pkp-_cKE": 5194392,
- "AEIzy1kNRqo": 14092523,
- "AEKztz8ubSM": 4700888,
- "AFF8FXxt5os": 11179797,
- "AFMXixBVP-0": 7747533,
- "AGFO-ROxH_I": 10180765,
- "AGXgGfA4PHA": 56829962,
- "AGqAggmwyMU": 258940703,
- "AH5h7F59Pcw": 8726706,
- "AHRh3EpJQH0": 3115271,
- "AIb5x7fmtvE": 2279899,
- "AJNDeVt9UOo": 1911993,
- "AK0NZITv5Ns": 2962528,
- "AK2aaur00i4": 8571432,
- "ALJGz4r_VF0": 62677176,
- "ALLSsIDhFdU": 13674879,
- "ALU24yhKJZw": 59551648,
- "ALaBkdJYXqs": 2953237,
- "ALhv3Rlydig": 4085863,
- "ALlKbGE6BH0": 25329808,
- "ALzFkqiTpvM": 24965054,
- "AM63tLZZzNo": 16752391,
- "AMTMtWHclKo": 34834809,
- "AN2DJxMLFOw": 71662856,
- "ANGRsubKS3M": 99646551,
- "ANnuQZyEKVo": 7075116,
- "ANyVpMS3HL4": 15234302,
- "AO9bHbUdg-M": 3458919,
- "AOOKe2ODlWM": 616854,
- "AOsWph2FNLw": 11020089,
- "AOxMJRtoR2A": 20228289,
- "APNkWrD-U1k": 4949053,
- "AQr0rNyUnFM": 14126767,
- "AR1uqNbjM5s": 7434036,
- "ARZD9Qid9lU": 7404031,
- "ARysRxZJmaA": 53030988,
- "AScf1Z40lng": 17364275,
- "ATVo6knQ4wA": 9582418,
- "ATuMxyoVh_8": 38546685,
- "AUqeb9Z3y3k": 12001258,
- "AVNuN89x090": 68194453,
- "AVpSjvpBwqY": 15312839,
- "AW3bPaErUWU": 7093459,
- "AXG1OEbqV3Q": 13682024,
- "AXv9B0bcZ1A": 11718627,
- "AY8ldIEi3fU": 8713495,
- "AYeVIV-TxRk": 19565375,
- "AZroE4fJqtQ": 3504032,
- "A_2f3onF3S8": 34967387,
- "A_8yPgC9zQc": 103009811,
- "A_ESfuN1Pkg": 2833408,
- "A_ToB9T-de8": 6354988,
- "A_e9D0iaiAI": 5603930,
- "A_lV-XArVeE": 7042111,
- "Aa0l_P0K5fs": 5133624,
- "Aa1CMokCch4": 9491866,
- "Aa4RIyDatO8": 45961703,
- "AaR1mPrdbTc": 5786925,
- "AbUkraQIYv8": 86337592,
- "AbecBgtWehE": 12592353,
- "Ac-Npt3vgCE": 6379262,
- "AcNDiCzz3do": 15393871,
- "AcpIO62x2oo": 4303475,
- "Ad0aaYixFJg": 28864593,
- "AfaFiSLM2hw": 43665393,
- "AfjH7Xn8VB8": 15082913,
- "AgPpM4jqkxU": 13960820,
- "AgQMgxkYk44": 9308749,
- "AhgR3X--bbY": 2528664,
- "AiW7syKXfJM": 2854819,
- "Aig1hkq3OsU": 6324211,
- "AimYG1jYD0A": 9550294,
- "AjYil74WrVo": 1923256,
- "AjvLQJ6PIiU": 149327056,
- "Akpl6wmAfZQ": 332564750,
- "Alhcv5d_XOs": 16937054,
- "Am-a5x9DGjg": 60791308,
- "AmN0YyaTD60": 197029789,
- "AmOO4j0E408": 33168802,
- "An46SYAxhtc": 2590282,
- "AnATlMVA12E": 2632682,
- "Anab9vKI7i8": 46836155,
- "AnwPH5yU8rY": 25609400,
- "AoRpWU6hHJ8": 19113373,
- "Aq3a-_O2NcI": 8152377,
- "AqFwKecNaTk": 3308524,
- "AqMT_zB9rP8": 1609400,
- "AqvaQfbAC64": 79898654,
- "AqzpkyiL4s4": 18045385,
- "ArcrdMkEmKo": 6815077,
- "AreOMvPCxv8": 11914579,
- "ArmlWtDnuys": 32282622,
- "ArvnBba_ogI": 2628492,
- "AsqEkF7hcII": 10873674,
- "At8jOJ_rpzA": 24220146,
- "AtK0QQYHKCk": 10541099,
- "AtbZZiSLemQ": 5834571,
- "AtiOjlyOQf4": 5074371,
- "AtlhAhONHyM": 37967685,
- "AuCH7fHZsZ4": 2224450,
- "AuD2TX-90Cc": 2654416,
- "AuX7nPBqDts": 5865950,
- "AurTtzpAr4c": 99580459,
- "Av_Us6xHkUc": 62380934,
- "AvtS_IrlbYk": 9944903,
- "AwKTZK8gqZI": 9426414,
- "AwX4O87g1qk": 11797556,
- "Awcj447pYuk": 2568194,
- "AwulrWkLy3Q": 2934701,
- "Ax8vcxRtmHY": 84457900,
- "Ax98k35h_jk": 13866966,
- "AxHAQ5l45FE": 15794916,
- "AxmY2n3LS8M": 23594247,
- "Axox0C6aoTo": 50300195,
- "AznXSVx2xX0": 14755295,
- "B-J9IHGivfQ": 13610816,
- "B0R3MJOrST0": 2284106,
- "B0Z4s38YIgQ": 9585502,
- "B0eHEo-f6fc": 89090547,
- "B2dCeTPDEKY": 23632073,
- "B2vtvtqZwwQ": 12483378,
- "B4HXrb8cPQI": 81686548,
- "B4k9JklNrTk": 26955449,
- "B5e7RMaz4IQ": 13194346,
- "B5wT4_JJMAI": 3676144,
- "B8NqcLiPlg0": 39098079,
- "B8OUL9QYNpI": 55415310,
- "B9vXathZikM": 55037364,
- "BAFOOQxiwkU": 6810362,
- "BBFUTbKx3qY": 10415035,
- "BBIGR0RAMtY": 10692013,
- "BC3csSM6G-s": 7464483,
- "BCEyKQQOl8E": 7912770,
- "BCH1Gre3Mg0": 183134210,
- "BD2avz0161k": 3686362,
- "BDWqwcTtZa0": 39394577,
- "BE0nxWUAg-A": 6881841,
- "BE1FK7vDVq0": 2898031,
- "BGIkU1yzBNM": 21642702,
- "BGyrSuW3GCg": 25963166,
- "BHFuLS9NW6s": 57323331,
- "BHTMuHvmarU": 10705776,
- "BHkw9_GWPJA": 8949975,
- "BI-rtfZVXy0": 7354275,
- "BIGX05Mp5nw": 2534650,
- "BINElq3DFkg": 1257128,
- "BIZNBfBuu1w": 4445069,
- "BI_jmI4xRus": 8339766,
- "BIpsQIJUCC8": 9171902,
- "BItpeFXC4vA": 6432224,
- "BJSk1joCQsM": 9154415,
- "BKGx8GMVu88": 11198858,
- "BLQNL_UGONg": 2759794,
- "BM-My1AheLw": 16488901,
- "BMNj7-Okclk": 6749645,
- "BMvR86gG0Ew": 13252473,
- "BNHLzEv6Mjg": 4134718,
- "BNmOZO9hbb0": 9924690,
- "BOHUX-DAdVE": 86988657,
- "BOIA9wsM4ok": 7906373,
- "BP5mCFyBCq8": 47615747,
- "BPAsaeCbFZQ": 90709668,
- "BQMyeQOLvpg": 17056004,
- "BR5yFOt0zao": 2310733,
- "BRHfy7envyQ": 18403226,
- "BRUOACBkFRg": 122512455,
- "BRVPlDCMgMg": 8322555,
- "BRXBCxKjiK8": 2772584,
- "BSQr7Ii_vbY": 6792268,
- "BSeQPlYD6S8": 34793920,
- "BSf_YIyZzi8": 19151236,
- "BT2Mfmmjm4E": 27513502,
- "BTNarhvGX88": 12816542,
- "BTOHSRVqN20": 71648286,
- "BTWLwoaNeBA": 3069296,
- "BTnAlNSgNsY": 7383650,
- "BUmLw5m6F9s": 13241861,
- "BVUeCLt68Ik": 28395351,
- "BWQCAsM-CF4": 6241911,
- "BWs-ONRDDG4": 16864785,
- "BXHNzUaIRR0": 1189175,
- "BXdXw-7Q82o": 56905328,
- "BXzR-hdSFUY": 21629670,
- "BY8DJeX_tGc": 12804485,
- "BYE5lxTzNVM": 33697256,
- "BYSE5ZUsrRg": 69323098,
- "BYTfCnR9Sl0": 4211263,
- "BZmtnCqTWik": 95042740,
- "BZxZ_eEuJBM": 7173401,
- "B_P48TakY3Y": 40715784,
- "B_vAlneziHo": 2821270,
- "Badvask-UDU": 1742502,
- "BbZB-WBVFSk": 9565998,
- "BbqbvSig6Mc": 20112738,
- "Bc9bhLk_AhI": 5512777,
- "BdSNiuJnZa8": 8344582,
- "Bdd1Lu5jN08": 189797282,
- "BdlkhDHbN98": 24404669,
- "BdmI14oSe4g": 10988410,
- "Be3tuYMgA9I": 21525412,
- "BeHOvYchtBg": 10074626,
- "Bf04LcSBpDw": 22491969,
- "BfVjTOjvI30": 10336396,
- "BgFJD7oCmDE": 10179635,
- "Bgrwohxf9Ws": 145064624,
- "BhQUW9s-R8M": 11006135,
- "BiVOC3WocXs": 6231980,
- "Bjnw_jwDt1Q": 33435515,
- "Bjymxow3TVQ": 160858637,
- "Bkkk0RLSEy8": 2177273,
- "Bl6jlgZ8aaM": 13697179,
- "BlBQBOb0OQ4": 14527403,
- "BlnUNmfGn7I": 5210878,
- "BngBBmwZY1s": 52468622,
- "Bp-iW9YxnNU": 50075049,
- "BpBh8gvMifs": 11081189,
- "Bq9cq9FZuNM": 8239482,
- "BqXS0liFvDc": 21036311,
- "BrYEuO7fwMw": 2882977,
- "Br_8t58mdeI": 7468108,
- "Bs2mEx4WZPY": 69316733,
- "BsLnura5zwE": 99830484,
- "Bt0mz4mGddk": 7940034,
- "Bt60JVZRVCI": 3952412,
- "BtqlMr1rUT8": 14129858,
- "BukTc4q9BMc": 2809637,
- "BuqcKpe5ZQs": 20331921,
- "BvQeXZg8_rY": 61302275,
- "Bv_3hBUTOk4": 2208433,
- "BveA7JiRGS8": 18894452,
- "BwPjtAe1gvE": 23633457,
- "BxMCXhVdDVU": 17533523,
- "By-ggTfeuJU": 15031276,
- "By11dtc-IEo": 47392955,
- "ByxzlyTmO_4": 21655387,
- "C-2Ln0pK3kY": 7236520,
- "C-I9m3RR2Cg": 77710623,
- "C-qg2Lcy6Ts": 8032705,
- "C0KEPCFZ3so": 9173291,
- "C0frzmxc5KU": 41280406,
- "C1pHvEAKmLA": 2792673,
- "C1smdOKd4Ds": 19608471,
- "C2PC9185gIw": 16595204,
- "C38B33ZywWs": 6867954,
- "C3DmiEsvs6U": 157752954,
- "C3HFAyigqoY": 3483476,
- "C3KlN5kTWAs": 3082228,
- "C3QPTCwpIZo": 1671056,
- "C3cwGCezgSQ": 62585617,
- "C4nfSAr2eWI": 19206766,
- "C5-lz0hcqsE": 9031701,
- "C5G2Js2_Ep4": 3851492,
- "C5Lbjbyr1t4": 7895282,
- "C6F33Ir-sY4": 3452812,
- "C6PUlTYnxLY": 127454923,
- "C6RFvROskM8": 38023092,
- "C6anMRFCt4s": 105241802,
- "C7CY4l99S7M": 10662984,
- "C7ducZoLKgw": 5438179,
- "C89z5GncK88": 64949947,
- "C9ITaG1_XoA": 63802848,
- "C9onjpQGpSg": 8622820,
- "CA4S7S-3Lg4": 4704256,
- "CAjiDkoZntI": 26017321,
- "CAnqu40RSbs": 3525395,
- "CAz6a5FwZJQ": 82328098,
- "CBEys2CTkgE": 5385115,
- "CBHfoQsF2Y4": 30155159,
- "CBsxUKKz1uY": 8050509,
- "CCAYcuCWOnM": 13364453,
- "CCsNJFsYSGs": 9208707,
- "CCysGY2cXUo": 5248206,
- "CDf_aE5yg3A": 22500696,
- "CDmJL-VNlaM": 6155147,
- "CEPuNmVKnZM": 13612446,
- "CEdXvoAv_oM": 3036526,
- "CFBKfgGTP98": 2184180,
- "CFSHq099Mx0": 4206182,
- "CFZv-UnbHLA": 1787022,
- "CFvVkPNV7cI": 36122850,
- "CFygKiTB-4A": 8515941,
- "CGA8sRwqIFg": 12107304,
- "CGC533KyVIE": 39370302,
- "CGJjjm7-DJ4": 13041665,
- "CGOIJdBXQno": 736956,
- "CGS0vihzSlc": 3500640,
- "CGZZINHT0I8": 2944713,
- "CGrbnripinU": 105955695,
- "CH6FQhlZn6k": 55363874,
- "CHHu-iTwHjg": 20482478,
- "CHfU9EDwOwU": 152267409,
- "CI84wFXN_Vg": 17498455,
- "CIH3VBBL69k": 7703590,
- "CIRZaJ4Vboo": 16560237,
- "CIoPn6BnLNM": 6406862,
- "CIyAs0bxeoI": 283022897,
- "CJRQ8gOjq4E": 10122470,
- "CJrVOf_3dN0": 8276971,
- "CJyVct57-9s": 4536736,
- "CJzuu_k9Nv0": 5616182,
- "CKR854hjydM": 56341583,
- "CLQRZ2UbQ4Q": 1863782,
- "CLWpkv6ccpA": 4044957,
- "CLneY6SoPi0": 20060294,
- "CLpoHZHn56s": 38237394,
- "CLrImGKeuEI": 6570083,
- "CM3IoLOKP5U": 22639479,
- "CMj-_-IUJQU": 1594786,
- "CN-wjj_phVA": 74510237,
- "CNP-dCQ-Cmg": 6695825,
- "CNSd1HufEcM": 17385978,
- "CNqYNgSYnKM": 6923022,
- "COZqJb-HT-k": 6889346,
- "CPB7C36zyjM": 9629239,
- "CPIS3JBcE2s": 1864145,
- "CQYELiTtUs8": 16462883,
- "CQxPpe17qyw": 4231051,
- "CRfgLoV25tA": 17967201,
- "CSXP02Cl3zM": 197388937,
- "CTKMK1ZGLuk": 1814145,
- "CVKAro3HUxQ": 2176605,
- "CWiHA5XtqgU": 5746138,
- "CXCtqBlEZ7g": 3364689,
- "CXsstWSXh68": 23614043,
- "CYNUwiUzlPk": 4669359,
- "CYjAgOTVfZk": 3261787,
- "CYmL-Up_ZNc": 12472147,
- "CYmrwLZD2HI": 128232989,
- "CYomswUKFuI": 293156023,
- "CYoxfm0kcsQ": 16565314,
- "CYr4n5KJ-yw": 13708731,
- "CZdziIlYIfI": 14522224,
- "C_7Tqk9fw4k": 24736019,
- "C_H-ONQFjpQ": 19574308,
- "C_HcAE8IUqQ": 22822199,
- "C_KffdI34ZU": 6294967,
- "C_LiAEjuIIc": 8391293,
- "C_OmWlMjsxQ": 23081557,
- "C_OxZpaOShg": 64268515,
- "C_mKAFpLY74": 72158048,
- "CafRuKs7EfE": 16443780,
- "CbeCE1HoGfA": 6208962,
- "CbgWfnqLJI0": 25894719,
- "Cc9cLmgXp_A": 130560678,
- "CcM2R6vIvfw": 36932329,
- "CcUBNRLDgrQ": 1873834,
- "CcziDRr5Myc": 23763802,
- "CdE1Sa18gIo": 8251961,
- "CdF-6PJ2jTM": 8997446,
- "Ce4BGV1DVVg": 9646361,
- "CecgFWTg9pQ": 3312031,
- "CfBYGFm5gPA": 4887334,
- "CfJzrmS9UfY": 14661690,
- "Cg4KlmI_acs": 47233568,
- "CgRLm2srV1E": 56816754,
- "CiKrFcgVSIU": 29063659,
- "CkNArgNPI2Y": 12116847,
- "CkQOCnLWPUA": 19290129,
- "ClYdw4d4OmA": 7313587,
- "Cn0skMJ2F3c": 12150605,
- "CnAi_YXuwq0": 4636090,
- "CnXuSCaCNBo": 15153432,
- "CpDfay5NeCg": 3954644,
- "CqN-XIPhMpo": 12140623,
- "CqsYCIjSm9A": 7635591,
- "CrV1xCWdY-g": 19763238,
- "CsrUfTljLJ8": 7220354,
- "CstmE8dmeEg": 28435316,
- "Ctytn4a6zjw": 15040685,
- "CuGg-Tf8lPI": 11345039,
- "Cum3k-Wglfw": 65410367,
- "CvO0a7suxmY": 23245242,
- "CvSOaYi89B4": 24070829,
- "Cw30IAkS7Fs": 311669136,
- "CwBmIHzmfcY": 7063235,
- "CxcP4ylUP5w": 2749506,
- "CyDtzMQbDfQ": 42923980,
- "CyNjK7dv-IM": 23581904,
- "Cz7V7QoD1LA": 7668930,
- "CzDA0WCdWHQ": 5099178,
- "Cz_GWNdf_68": 10394261,
- "Czwrqu5czFU": 9050344,
- "D-EIh7NJvtQ": 5334062,
- "D-oAsFIHqbY": 13566181,
- "D02rH3Ufcy8": 4278850,
- "D1NubiWCpQg": 6086939,
- "D1cKk48kz-E": 2114240,
- "D1eibbfAEVk": 49575967,
- "D2Ks5SKU6GM": 1865862,
- "D2sMsmL0ScQ": 14078190,
- "D2xYjiL8yyE": 98514345,
- "D4nK5uXuPXM": 15215552,
- "D5-1qEKtfQ4": 10213730,
- "D5NVlAaT-OA": 4233110,
- "D5fmcpNygQk": 2822281,
- "D5lZ3thuEeA": 3792151,
- "D5ymMYcLtv0": 23552748,
- "D6mRPgvAEOc": 14063853,
- "D6mivA_8L8U": 1971888,
- "D6yHKOYJiso": 4188823,
- "D8NVS7itIOo": 8549398,
- "D8cHdto-G-I": 87241053,
- "D9uJxXnDTU8": 53102439,
- "DA2w8lRelIc": 8049945,
- "DAikW24_O0A": 4479258,
- "DAvEI0rLrAw": 68550350,
- "DB7jL_2bxag": 32926299,
- "DDkn5AMXoAU": 5900644,
- "DFD1oDbrSjM": 11379271,
- "DFPBdbx0vFc": 14015337,
- "DFfpIZKXIew": 40758023,
- "DGBYyf08nWM": 81706071,
- "DGMs81-Rp1o": 21864968,
- "DGRnSnPSOqg": 16661721,
- "DGZNaKnbQo0": 4750472,
- "DISpHFWYtRM": 295686068,
- "DIW6TBHhnNg": 70633205,
- "DIjlllgq3dc": 5465605,
- "DJY89_jC_ZY": 15146341,
- "DK1lCc9b7bg": 4740876,
- "DK5Z709J2eo": 34730205,
- "DKMWS9qJ_1U": 56658029,
- "DKXAHh9PZJQ": 20854895,
- "DKh16Th8x6o": 3397544,
- "DKnFvXmUlOI": 148089380,
- "DKzi5CYNFAg": 23053398,
- "DL-ozRGDlkY": 11294058,
- "DLD23lPv8eo": 39679652,
- "DLno3b-Xsmo": 3449570,
- "DMCowipIXgE": 18745676,
- "DMDcn2j-8ig": 24002148,
- "DMd9mTyzj6k": 3557383,
- "DMxaK0xjIdE": 90646485,
- "DMyhUb1pZT0": 1818018,
- "DNAnQBhGpRw": 8336622,
- "DNoDJlB0ygU": 2887758,
- "DP4-S716q4E": 44055689,
- "DPIAVBv5iH4": 126509508,
- "DPuK6ZgBGmE": 10985810,
- "DR2DYe7PI74": 1171016,
- "DR42xdsLWkc": 26238228,
- "DRIpznER-VQ": 89451662,
- "DROZVHObeko": 8551368,
- "DRg2VCo8lP0": 5495092,
- "DRlE85xYqzE": 145236323,
- "DRpdoZQtvOM": 3689084,
- "DRtLXagrMHw": 25755389,
- "DRz9B6SHWQ4": 122661422,
- "DSvLJZnH2KQ": 58032867,
- "DTF2qg2McwY": 4699215,
- "DTHdyDWmMbc": 34915466,
- "DWKWjpVsGng": 7405675,
- "DXEG8l1FRRk": 70532871,
- "DXc4pa9lIaA": 63570197,
- "DXpZth7iBaQ": 15354849,
- "D_jevR2FvzE": 28170403,
- "D_smr0GBPvA": 2421887,
- "DaQlieZH1kk": 2396180,
- "DahDvwYY28Y": 25308543,
- "DaoJmvqU3FI": 4258454,
- "DataCxJ5qcM": 11335285,
- "DcnuU3Xj-cY": 34372585,
- "Ddvw2wEBfpc": 2672129,
- "Df2escG-Vu0": 3613061,
- "Df9h5t64NlQ": 4185150,
- "DfO27juYly8": 10816893,
- "DfhhHr1KQic": 5997062,
- "Dfkq9SOWxY8": 6039889,
- "Dg9zqpBUcZ4": 16755630,
- "DhW9pz5Vfwo": 4937618,
- "DhefUahS55o": 95566910,
- "DhiiGFuUE9I": 30553366,
- "DhqHyHhibJw": 11197690,
- "DhwgNaRwscQ": 7834039,
- "DiBXxWBrV24": 4918765,
- "Dj1rbIP8PHM": 2078953,
- "DjNMJpdFPGA": 132384992,
- "Dk1nuM5JKqQ": 23949883,
- "DkZnevdbf0A": 1809951,
- "Dl0RRDiG6O8": 56937809,
- "DlBQcj_zQk0": 4734180,
- "Dnxm4UQPDTo": 209169180,
- "DoNiKvnYW_A": 21030287,
- "DopnmxeMt-s": 1770379,
- "DplUpe3oyWo": 3133159,
- "DpnUrVXSLaQ": 8515420,
- "Dpo_-GrMpNE": 2934148,
- "Dq0xFgQB9qo": 1104161,
- "DqeMQHomwAU": 1718543,
- "Dqp6xOeR3Ls": 4601420,
- "DrRsXhln4S8": 7938711,
- "Dru0RHgfp2g": 10189163,
- "DseIYQdjzgE": 184969264,
- "DsgBALSxqtY": 35703396,
- "DtCfOMl3qo0": 6866454,
- "DtWovvMnPrk": 20490314,
- "DtlFQ_nNaQM": 7579999,
- "Du-0kAn4u6w": 29620958,
- "DuArVnT1i-E": 20779429,
- "DuHAMkgT6B8": 78373526,
- "DuYgVVU_BwY": 5874664,
- "Dui5V8TZYbE": 162449596,
- "DvV0e5F98NQ": 7234027,
- "DvYs1HILq1g": 11911695,
- "DwcW12J1FFA": 42781673,
- "DxSmZ0MDSxM": 2163589,
- "DxkkAHnqlpY": 7639551,
- "Dy5uDkOoMNc": 5464801,
- "DzJvR56Suss": 3136356,
- "DzVug3LpSHk": 18772813,
- "DzYwB3uSU-c": 3093195,
- "E-HOz8T6tAo": 8178687,
- "E-q9JpkGc-8": 11813238,
- "E0TNh9uWesw": 2210581,
- "E1P79uFLCMc": 24421323,
- "E1j8W64NQ0Y": 9340841,
- "E1tA9-ypx0g": 111667339,
- "E2MRMdaPKcc": 2589473,
- "E2VxbufzuWQ": 8319155,
- "E2bu4bG9yw8": 1493005,
- "E2qP4TsHGGQ": 8380300,
- "E34CftP455k": 7499152,
- "E3OfSGjpDoI": 2200825,
- "E3vXfrKaoCY": 1237202,
- "E444KhRcWSk": 7328247,
- "E4HAYd0QnRc": 14512774,
- "E4WYJC85UQk": 19725873,
- "E4rbS0oxg30": 6389680,
- "E52oU-pwDxY": 38766175,
- "E5PndKebh70": 34530151,
- "E5f5smh7Keo": 61292847,
- "E78ji1uBtSA": 2793064,
- "E7OkUomRq1Q": 13911008,
- "E8HagppxzxY": 8566873,
- "E8jeQcDH1fM": 7347033,
- "E97Ez4lCBYc": 21617639,
- "E9Q_Lc0g1xE": 14394185,
- "E9fw0EU4wpA": 10819471,
- "EA0LkCkvUeU": 5931524,
- "EAR9RAMg9NY": 97032751,
- "EATkbpqlxvc": 48260800,
- "EAa3J_nDkoI": 5433574,
- "EBKNtjZAjXg": 10508909,
- "EC2mgUZyzoA": 6907259,
- "EC4wJhOEUz8": 40386672,
- "ECcD0rR9Gws": 1089649,
- "ECdR_W3Fk4Q": 50613545,
- "EDlZAyhWxhk": 1962175,
- "EFB9JrBW4ro": 1027087,
- "EFVrAk61xjE": 5950802,
- "EFdlFoHI_0I": 6316083,
- "EFsaaK1w2Ao": 113664180,
- "EGNlXtjYABw": 33916431,
- "EGr3KC55sfU": 743380,
- "EGy1W24EPEI": 925936,
- "EHEecXYsJ9w": 25782608,
- "EHLRl2D6zyE": 17617896,
- "EHR-YDwrrhM": 14494907,
- "EHUlWm0kFTA": 10480946,
- "EINpkcphsPQ": 12232168,
- "EIm1BSVCpno": 17297952,
- "EJTPGyWqhqc": 2963885,
- "EJjnEau6aeI": 3123468,
- "EK-h6cZCXrs": 81236003,
- "EKKe7DBZVhI": 24809300,
- "EKLGgTwyNfU": 1514330,
- "EKvHQc3QEow": 17065997,
- "EL5kJ-Mzuug": 18256413,
- "ELgQQjRhkic": 39250783,
- "EMyHmzVOgbM": 1979458,
- "ENAZqOoOVaI": 36916400,
- "ENFNyNPYfZU": 9182939,
- "ENKH97PYssg": 1525361,
- "ENL8peIiG_Y": 57485790,
- "ENg2ajvKYss": 22722855,
- "EO4_vu9IuNk": 10536842,
- "EOJrRnpiq5s": 5229887,
- "EOiCa4i3oKo": 2444287,
- "EOnlvbWjFOE": 23852266,
- "EOpzN8ZHqpU": 7327388,
- "EPXilYOa71c": 6134257,
- "EQJf8Gb8pg4": 12095953,
- "EQhBl75ZiKQ": 20847972,
- "EQoNfxToez0": 13056428,
- "EQrCdEF3vNE": 7553042,
- "EQvTEFCANTM": 25717574,
- "ER49EweKwW8": 45828381,
- "ERKx3Oa2omo": 71544624,
- "ERRR8cY7iQ4": 7581824,
- "ESO-EMKJwmg": 44396103,
- "ESSMQH6Y5OA": 14580406,
- "ESusD8HRLBI": 17293140,
- "ETdNsO7mKXM": 18593714,
- "ETzUpoqZIHY": 5071955,
- "EUGCai8y2Uw": 292730849,
- "EUn3yJsc4Cs": 1416323,
- "EUqhLxFccbM": 2533645,
- "EV38zfiY6Vs": 2687844,
- "EV5dhv0A2wU": 13349229,
- "EVSkf7l7EuI": 9908756,
- "EVkFPeP5sFI": 7042783,
- "EVoZCOVzdaU": 31552777,
- "EWobKZYmPik": 53881520,
- "EX1eFeaTiYM": 7231056,
- "EX9CdUAMpgE": 2752797,
- "EXLVMGSDQbI": 2851647,
- "EXLj51aZgnU": 28274169,
- "EYlT-9KYPO0": 19999705,
- "EYyYjwp10cM": 482972,
- "E_1gEtiGPNI": 7027293,
- "E_Hwhp74Rhc": 8365826,
- "Ea6qS3nuvng": 151707264,
- "EbPrlb3mB1k": 51431025,
- "EbRxaBShveI": 7295012,
- "EblnaLMjdNg": 91803206,
- "EbmgLiSVACU": 3758546,
- "Ec-BKdC8vOo": 22561264,
- "EczhLjFtyio": 29855394,
- "EdQ7Q9VoF44": 9875472,
- "EdYyuUUY-nc": 11070917,
- "EdyociU35u8": 256695293,
- "EeIXVN1zUeM": 6346869,
- "Efj-CugNO3I": 16864406,
- "Efoeqb6tC88": 3712439,
- "EgOyJJxuuP8": 4071578,
- "EgTd7OSTO1I": 12102253,
- "EgtB1aF3MIU": 1226565,
- "Egzqu5DWwbA": 414713629,
- "EhEg8Wx_NA8": 86702218,
- "Ei54NnQ0FKs": 6317975,
- "Ei5mgFtUGns": 9684720,
- "EiZJzWPTm0I": 6795648,
- "EjtjdJZ2x8w": 14452645,
- "EkBUTZe_SiM": 4154591,
- "EkFUb3L040E": 8624920,
- "ElU1e1EonOM": 81622708,
- "EmE3BTd2gqs": 16754614,
- "EmQ1TdoT-zE": 137286928,
- "EmTvdKkAUtE": 11152315,
- "EncR_T0faKM": 178209842,
- "EnwWxMZVBeg": 7700015,
- "Eo21CfNJfCs": 18041213,
- "EoCeL4SPIcA": 1827119,
- "EowIec7Y8HM": 2500062,
- "Eq4mVCd-yyo": 1503771,
- "EqH9R6Otn7I": 24244821,
- "EqNzr56h1Ic": 8179776,
- "ErHFQUhZ94I": 939407,
- "Es8yvgc5kvY": 1804361,
- "EsQyCHs4IBY": 13274128,
- "Esj5juUzhpU": 130567384,
- "EtTGyLsR7lk": 44723430,
- "EtZnPoYbRyA": 21084484,
- "EtefJ85R1OQ": 5081110,
- "Etx366BN34g": 66805905,
- "EuwKjpUpkhs": 10241428,
- "EvvxBdNIUeQ": 4202737,
- "EwEbZI57P1o": 7115819,
- "Ewif2XGL2a8": 11179922,
- "Ewithks6nD4": 22106428,
- "ExJC8AoAczE": 12060110,
- "EyORbCPUAd4": 26950328,
- "EzE53aPGbrQ": 10749085,
- "Ez_-RwV9WVo": 6168106,
- "Ezp8F7XJHWE": 22631176,
- "F-zRXHAo4-U": 17985759,
- "F00vnE37pIE": 58608016,
- "F0LLR7bs7Qo": 4863985,
- "F2mfEldxsPI": 7893359,
- "F2psxMnGdUw": 7124121,
- "F2uzWHppVrk": 15725693,
- "F4Lt0AjMxEY": 20585346,
- "F5Nb6cIRZLU": 4985697,
- "F5RyVWI4Onk": 85658197,
- "F5uiFXECnVY": 3167822,
- "F6UQLiHB0k0": 37847014,
- "F6ZsIyKHTNI": 177035082,
- "F6dZjuw1KUo": 19339327,
- "F6rtQczAYco": 2978395,
- "F7r7l1VG-Tw": 12882713,
- "F8OPQ_28mdo": 100179125,
- "F8RCR_1jIAk": 9295795,
- "F9SMvVtKxXM": 29013931,
- "FBWGRbHf7rU": 15140821,
- "FBn1RlGfdzg": 4272080,
- "FBoYigdnLKQ": 10405634,
- "FC50D7mQhGg": 41501078,
- "FCMxA3m_Imc": 16745084,
- "FD-A0MhYc7Y": 20014203,
- "FDJ4D78pcbg": 21993451,
- "FE2jfTXAJHg": 25361143,
- "FEAXI5XeJ4M": 17709221,
- "FEF6PxWOvsk": 8400914,
- "FEKVfWuNOYY": 4387438,
- "FERlpfxuS6o": 3859330,
- "FEYN0jK1-pI": 8147175,
- "FGq9-R6Yw18": 15687458,
- "FH1L5NnuDXM": 150224887,
- "FHptu3tcJnM": 11356338,
- "FICRd7Lp67s": 5693390,
- "FIt1RNiCO6U": 17915438,
- "FJ7AMaR9miI": 4354240,
- "FJIZPvE3O1A": 7686277,
- "FJPTnxDgQgc": 12008409,
- "FJo18AwLfuI": 4104331,
- "FK1s1-OJ5BE": 40417302,
- "FK6-tZ5D7xM": 12302734,
- "FKJjqEdfB9Y": 11696773,
- "FKraGDm2fUY": 8768215,
- "FL3Q5Q6IdAY": 20273517,
- "FN1qz8tp89g": 109188559,
- "FNVvQ788wzk": 25284050,
- "FNnmseBlvaY": 2870329,
- "FO10z7FX13c": 5373685,
- "FOkQszg1-j8": 7567364,
- "FOyH5ZCW7ZU": 6986811,
- "FP2arCfAfBY": 8843805,
- "FPNhCVZlbJs": 2643839,
- "FPh6EDv0Eew": 2309640,
- "FSpSrZQzzVs": 2579630,
- "FT8eIAMLbo4": 3551941,
- "FVSgVMVZZ-4": 8969955,
- "FVedgkn0o70": 21704356,
- "FWEqB0J6mgA": 4249217,
- "FXG056WcAxY": 55429314,
- "FXSuEIMrPQk": 19714895,
- "FXYX_ksRwIk": 13145013,
- "FXZ2O1Lv-KE": 13951008,
- "FXgV9ySNusc": 9902863,
- "FYMn61HLw1k": 4169654,
- "FYTfo4y91TI": 11836344,
- "FYjCUGK-fT0": 35227358,
- "FZ2APP6-grU": 2274601,
- "FZXSc26Sajo": 8681916,
- "F_BI7rBhfos": 21044602,
- "F_ySQvjtAxQ": 41213013,
- "FaDtge_vkbg": 2049416,
- "FaF3v-ezbSk": 12283757,
- "FaKB7Y2gL9Y": 5719376,
- "FaOOx6IZxV8": 9128563,
- "FbP9nUrtKto": 22428338,
- "Fc5t_5r_7IU": 18171106,
- "FcLeaD3UII4": 2345217,
- "FcRxdq7KGOQ": 4188759,
- "FckjcoZDxbE": 2418790,
- "FcyYynulogY": 32370974,
- "FdD0Wu032R4": 2115084,
- "Fdu5-aNJTzU": 8717711,
- "FfN8uQqLa_c": 17439081,
- "FfdpupKByiU": 4881507,
- "FfugceYn140": 5991718,
- "FfyNtrmmGEI": 153141115,
- "FgVkgR1bXvY": 45422417,
- "FgsgpoFhleA": 24965574,
- "FjRyBJME0Qw": 13028010,
- "FkDVucEoJpU": 9244644,
- "FksgVpM_iXs": 7330904,
- "FlIG3TvQCBQ": 19712942,
- "FmQoSenbtnU": 19580345,
- "FmjSUyyc-3M": 35969647,
- "FnkATpF4O2Q": 4584424,
- "FnrqBgot3jM": 2672141,
- "FogJFEEYuO0": 7395158,
- "Fp7d-NmKN5M": 27330660,
- "FpI2PhJn86s": 15856277,
- "FpLPx_Akl7Y": 48222103,
- "FqGLqdk9Sr0": 39064113,
- "Fr_La6MrAfM": 5029452,
- "Frpq_A7Ky_Q": 18120868,
- "FsE3QvWqeqs": 21923415,
- "FsO3A07Abak": 29957616,
- "FsS0nLKoaoo": 87549613,
- "FssCS9RhFt0": 8824730,
- "FtUekmRNi8M": 17067079,
- "FttqXKdw_Xk": 54187486,
- "FtxmFlMLYRI": 45677710,
- "Fvi9A_tEmXQ": 8169221,
- "FvsSPJoJB3k": 102722164,
- "FwA_UZkI-JM": 6061970,
- "FwMYoK1QKso": 1353220,
- "FwuPXchH2rA": 11361997,
- "FxN1tfd8_lk": 1017592,
- "FxPXC8t-2ls": 32026824,
- "FxkTSjctXdk": 10401445,
- "FyiwPshXyE8": 1185068,
- "G-PFEbQ5UGc": 46443002,
- "G-T_6hCdMQc": 10196795,
- "G1Hs2GZKOhw": 128696328,
- "G1cNKc3PD74": 5821724,
- "G2JdRB3bdFM": 13801987,
- "G37C5vKCwH4": 4001718,
- "G37qpVUzB1g": 63451924,
- "G3bO8RcRgxQ": 14724967,
- "G4CgOF4ccXk": 7991328,
- "G4VxHxwi6DY": 8873011,
- "G6OoxGmJzuc": 14036005,
- "G7QiIkYfeME": 2119978,
- "G7WyEp8gHs0": 4136606,
- "G7ZAwUdBNFE": 74546060,
- "G7sxV2G-OEo": 10484379,
- "G8lI6niHjKU": 26709257,
- "G8s3SkAm-gM": 7100836,
- "G9DDOq7MtLk": 7869802,
- "GAQ9KyxDYUY": 9962820,
- "GA_yxxeFYBU": 7203745,
- "GAaQ9O-NCoc": 5860731,
- "GAhZuUYkGyo": 26484911,
- "GAmzwIkGFgE": 9286432,
- "GB9Rqsah2gs": 3497830,
- "GBbTouUAWKs": 120405175,
- "GBtcGO44e-A": 4284684,
- "GDXyGy5TjnI": 6305722,
- "GDcVdBAnBdU": 2922097,
- "GDlDirzOSI8": 15980971,
- "GDppV18XDCs": 11495184,
- "GEId0GonOZM": 2476430,
- "GEJ5c2ACtGk": 20926284,
- "GEeKOeGHddY": 3630894,
- "GFLkou8NvJo": 43772364,
- "GFiizJ-jGVw": 5293893,
- "GFnucXG0K1I": 173695833,
- "GGQngIp0YGI": 7038242,
- "GH56wMh3FZg": 57341091,
- "GH8-URjRQpQ": 6156680,
- "GHDrDdu6vrU": 9353011,
- "GKlUFww2g7U": 25989079,
- "GKohvH75Mqg": 8951945,
- "GKsygFxt4XI": 11726928,
- "GL7qJYKzcsk": 237147606,
- "GLEJgVSL0Ac": 47081017,
- "GLgrt_4WnMY": 57156465,
- "GMjwjXKt0SE": 8680382,
- "GMoqg_s4Dl4": 3914636,
- "GN0P5RkQAow": 145914754,
- "GO5ajwbFqVQ": 6873338,
- "GOjMC00-3uQ": 88455221,
- "GP53b__h4ew": 25472436,
- "GPomGcZ3_kk": 20184479,
- "GQBRWjHdir0": 7113032,
- "GQXUpB2NHvQ": 4691518,
- "GQf1vjfxuo8": 2287340,
- "GR2GA7chA_c": 39296049,
- "GR9d9wrOl5E": 34567883,
- "GSy4XwV67iM": 6192099,
- "GTwrVAbV56o": 124338895,
- "GUwV0gibLx8": 4652286,
- "GVZUpOm3XUg": 4551249,
- "GW8ZPjGlk24": 36549412,
- "GWZKz4F9hWM": 3013620,
- "GWsVTu1rgUo": 60476083,
- "GY1ooKN46BE": 31292815,
- "GYLTVhxWCEI": 18087392,
- "GYpJlYI2VBI": 163062126,
- "GZ1ogxruLJM": 11127301,
- "GZ6I3T1RAnQ": 14103257,
- "GZInN7p1D0M": 6835741,
- "GZUn5RYkSkE": 239219175,
- "GZx3U0dbASg": 25724426,
- "G_mUcQeXak8": 1825643,
- "GacKM9yxiw4": 48615915,
- "GcLSWBjp6UM": 7151490,
- "GcjgWov7mTM": 16634936,
- "GdIkEngwGNU": 15060385,
- "GdfP-loRfm0": 44803689,
- "Gedy8LwQTaw": 9328946,
- "Gf2fNKZcGPA": 198985883,
- "GfUKL30pG08": 4500035,
- "GiB9Mkgkrek": 3422618,
- "GiGLhXFBtRg": 7354939,
- "GiSpzFKI5_w": 3541925,
- "Gl7bQNm92fE": 19471247,
- "GlkqvEOYicA": 26888779,
- "GluohfOedQE": 7946883,
- "GmD7Czmol0k": 3251703,
- "GmomzubjO1I": 36401129,
- "Gn2pdkvdbGQ": 7545248,
- "Gn3mJOC1wK8": 14061168,
- "Go5nAAwQnpA": 7608499,
- "GoRhRJXp0j8": 33531487,
- "Goi6mjtB5oE": 27687423,
- "GonTjrX5PjA": 8284091,
- "GpBD_1pT_mw": 27617624,
- "GpOxsRF1Cjc": 4826340,
- "GpZYCOFAI_4": 25372691,
- "GpwAsXrBJ-Q": 44154256,
- "Gst4ys6eusM": 3234055,
- "GtOt7EBNEwQ": 28085167,
- "GtaoP0skPWc": 8388530,
- "GuaozMpFS3w": 14307635,
- "GuwIBNbJKkQ": 5362194,
- "Gv_1viYhEoU": 5149331,
- "GvbrtnEYRpY": 6358464,
- "GvgJ2_7P9SA": 1813922,
- "GviCdNfeXw8": 8474930,
- "GvmZQXbWP3g": 2168921,
- "GwTehaUOkhg": 64176303,
- "GwjiR2_7A7Y": 2046398,
- "Gwjlw3K2OrQ": 25017983,
- "GwoX_BemwHs": 12810157,
- "GwycEivqYYI": 2661259,
- "Gx5D09s5X6U": 29117265,
- "GxQAAqRzwNw": 62394634,
- "GxaZZMg30cQ": 17698343,
- "GyBS8GMynKQ": 14097831,
- "Gy_7ZMdpNy0": 78302163,
- "Gyn754vw8ZQ": 37696606,
- "GypHy3gnG5E": 4247565,
- "GzTr-OnMI-E": 20111200,
- "H-E5rlpCVu4": 4527620,
- "H-HfmyUzPw8": 7757379,
- "H-OoyU8Gb_Q": 14027160,
- "H-aDABqFY6s": 23156774,
- "H-de6Tkxej8": 4292141,
- "H-qREcJqUhY": 22380654,
- "H-ykHosJW9c": 10498593,
- "H0I7jQb37bo": 34091990,
- "H0q9Fqb8YT4": 2341963,
- "H1E_Nwj2dro": 23807452,
- "H1H0xmjZMPA": 4851120,
- "H235paj_4PE": 294290139,
- "H3XT-YU2n0c": 247249487,
- "H3i-OUb5z1k": 11964565,
- "H3tVuMFFQpM": 43436043,
- "H3tg4bH5JuY": 11144972,
- "H3uBAVI4xC4": 90482506,
- "H4BstqvgBow": 2377012,
- "H5eIE7zdnvI": 5383035,
- "H6RXlL7keGw": 1561448,
- "H6ZNLD1AeM8": 6625600,
- "H6gtCQUhNGk": 9549181,
- "H7nrVDV8ahc": 11158016,
- "H95wT4wT95w": 63445225,
- "H9BWRYJNIv4": 25052041,
- "H9UEZdAnnt8": 3721188,
- "H9eo5CTB74Q": 258587380,
- "HALbfdYE3hM": 259695328,
- "HB52UTcAv0g": 1047417,
- "HBJSxi9Pgo8": 38911694,
- "HBi8xjMchZc": 3853983,
- "HCC96awA-FM": 1135498,
- "HDOJe3JPmJM": 10922021,
- "HDgRsZedjI4": 22793007,
- "HDntI7zfBNs": 8135243,
- "HEH_oKNLgUU": 12278390,
- "HERb3x0aw6c": 13494893,
- "HEiO1n_zMLk": 6160255,
- "HFecdPI_-dg": 21981730,
- "HGb9m1dbNdM": 35848990,
- "HGoZfzz6dU0": 4614317,
- "HGsg7OZiHhE": 13565713,
- "HH58VmUbOKM": 20384556,
- "HIu1S2Wsso8": 3891496,
- "HJV_HY0Sh0s": 3006661,
- "HJg_7bjGbX0": 60514288,
- "HKUJkMQsGkM": 1530636,
- "HL1wuw_k984": 3012376,
- "HLGCq2h4ihY": 1369635,
- "HN6FNS7lRhw": 4010025,
- "HNP0USRtkIw": 641913688,
- "HNoyVb1hr7g": 39563763,
- "HO1dsNrzE58": 18031807,
- "HOMn523JBok": 50941007,
- "HPRFmu7JsKU": 15498112,
- "HRuLhY0NAMI": 15965844,
- "HSWheVsykiA": 393414,
- "HSf9O1Domms": 4356832,
- "HTDop6eEsaA": 10910988,
- "HUZDPWLTZ0g": 23023510,
- "HUn4XwV7o9I": 2019920,
- "HUnF0mZmMKc": 1301562,
- "HVuyK_vIMfc": 91530137,
- "HWivDUWFaX0": 53443051,
- "HXIj16mjfgk": 2808715,
- "HXg_a9oJ5nA": 5586840,
- "HXy34-mIPuI": 1424734,
- "HY-8ydAbiik": 2731702,
- "HYHc2alzdUk": 84021017,
- "H_Guv2Mk1E0": 120350381,
- "HahjsBApxLE": 12847826,
- "HbDWBeRJboE": 4762673,
- "HbIdp5DURJA": 4692193,
- "HbZ2asfyHcA": 40756125,
- "HbmePz_MktE": 15085205,
- "Hbuh5m3p0x0": 9299161,
- "Hc9mcx739js": 14927787,
- "HdqbCvqTb20": 15053740,
- "HeUuToFuao0": 190725311,
- "HfXqyPS5bRo": 17195893,
- "Hfz1bwK5C4o": 7653917,
- "Hh3iY4tdkGI": 16026635,
- "HhN5Zkbpt_k": 76820486,
- "Hhc96U_HvQE": 12609887,
- "HhzqZbz_NQ0": 34338826,
- "HiNrFT280_Y": 1920263,
- "HiY5UElqfhs": 1361903,
- "HiphWQfB6J0": 2208836,
- "HjBfBB9r2QM": 188085701,
- "HjDQxAFSwEo": 12084610,
- "HjwELgIh_qc": 142463202,
- "HkBFunEh8iY": 7923333,
- "Hkmsu9Tl7NE": 36531179,
- "Hkwfibux88s": 4306086,
- "Hl5Y0k8biGo": 307657935,
- "HlXAeOnU520": 9517645,
- "Hlal9ME2Aig": 7516946,
- "HmAyjo0Ghh0": 279688362,
- "HnDvUaVjQ1I": 2743860,
- "HnfBFeLunk4": 4037375,
- "Hod_JfGJPj4": 9707663,
- "Hoyv3-BMAGc": 3563493,
- "Hp46Y6j_Qdc": 60986445,
- "HpDJBFflYKI": 14879706,
- "HpdMJaKaXXc": 12846009,
- "Hpfs8uEo9WA": 281029178,
- "HqiBo62O8bk": 7363735,
- "Hqzakjo_dYg": 7688795,
- "HrMgmnZ_4gs": 4487507,
- "Hrjr5f5pZ84": 3027217,
- "HsQqb1E-bAU": 9734757,
- "HsyrOicubso": 13413452,
- "Ht-YXje4R2g": 1651704,
- "Ht35BfnTSiM": 28671484,
- "HtvikVD9aa0": 4689182,
- "HtylaWKBT_I": 16876207,
- "Hur3v1hrX3U": 3577562,
- "HvDqbzu0i0E": 10866636,
- "HvHnYXpeRsA": 49310791,
- "HvYUKRMT0VI": 7961546,
- "HvqJ-s26ol4": 28439959,
- "Hw2_hv439Fg": 83786456,
- "HwSszh3L358": 1355067,
- "HwkEQfsJenk": 7944097,
- "Hx6-m510hjU": 52442728,
- "Hxk6GCKUiZI": 10760762,
- "Hz0neklvbX8": 259889823,
- "Hzz5p0qlObs": 3787000,
- "I-Ha9At0zIo": 277171285,
- "I-Or4bUAIfo": 14571753,
- "I-uzVCJCRpE": 16021309,
- "I-y5d4Jjzfk": 396225117,
- "I01O0r8b-po": 5602834,
- "I1KRjQmFEIc": 23039459,
- "I1KmEWmmozc": 2625503,
- "I1rULaaHZ6M": 17831991,
- "I2M7U8eCeHA": 135834740,
- "I2dbzp0zHuw": 8829483,
- "I356lV1v8Bc": 191658092,
- "I3jyBUyjg48": 2570407,
- "I3kQJvR7ZIg": 8490968,
- "I3vIAzMcm4Y": 6052384,
- "I4iwhvDhvKE": 58295681,
- "I5xcZgyY4ag": 2339385,
- "I6LsWSXx8fg": 14521721,
- "I6TBBzIvgB8": 7198362,
- "I6wzan4hNc4": 10863818,
- "I7FDx4DPapw": 13774991,
- "I8BLj7cRM7c": 14981317,
- "I9S5CvSqb5A": 1711467,
- "I9eLKDbc8og": 3483147,
- "I9efKVtLCf4": 2208946,
- "IB3iJUuxt1c": 8626351,
- "IBS-vKDw9BM": 20515580,
- "ICI0gpCS_Pc": 267260161,
- "ICQCUTiC0mI": 48559805,
- "IDLCwhijNG4": 14254965,
- "IDQYakHRAG8": 16556372,
- "IDkhHTjlg0M": 8044488,
- "IE9hAzVAGeY": 19921660,
- "IEKU6tubTEw": 2818968,
- "IFFxSBx-P0U": 77591109,
- "IFKnq9QM6_A": 25582857,
- "IFU7Go6Qg6E": 3955990,
- "IGs7IB48Fvg": 1123691,
- "IHEPNJJlGT4": 3929918,
- "IHgoDWM9hAc": 3964262,
- "IICR-w1jYcA": 19501693,
- "IJWDyPFXGyM": 4342115,
- "IJySBMtFlnQ": 4660333,
- "IKRT-boQTr0": 20553673,
- "IKsi-DQU2zo": 4041934,
- "IL3UCuXrUzE": 10678505,
- "IMLVbEzM0DI": 20100201,
- "IMf5BbjpT1I": 782486,
- "IMvBKaeaxco": 4503432,
- "INmIcOPKo_M": 14374542,
- "INqaHHZGt8w": 3529515,
- "INvpZ9Ra4NI": 150739010,
- "IODR5mJMwOU": 27231392,
- "IOIx0T4vx8c": 530103881,
- "IOuZHx6w-gU": 243105313,
- "IOzZVmgK3IM": 9765324,
- "IPxQQNyCxas": 11867772,
- "IQJ4DBkCnco": 7863405,
- "IQiv4uQNaFQ": 14207271,
- "IR1Qc9F4GR0": 54260990,
- "IReD6c_njOY": 14586059,
- "ISGFo8t0a4c": 1031910,
- "ITA1rW5UraU": 8907816,
- "ITVQrzDSekU": 4519103,
- "ITc5DeU1zaw": 7702612,
- "IUgVtLPUgVU": 124314042,
- "IVHD9wGlbho": 25692985,
- "IW4Reburjpc": 19101967,
- "IW8OnV8J2Qw": 13843355,
- "IWigvJcCAJ0": 7533943,
- "IX85uiG86RA": 209628889,
- "IXLC14sWqNM": 6104949,
- "IXRMVcoqRRQ": 1494856,
- "IXtreNuEC-Q": 7623727,
- "IXycPq7MnwE": 2981411,
- "IY8BXNFgnyI": 2970771,
- "IYFkXWlgC_w": 7811366,
- "IYS4Bd9F3LA": 10311095,
- "IZ8W-h764Cc": 7643460,
- "IZgM4NPN4eU": 17588653,
- "IaE632EzCxM": 14359278,
- "Iarv4xiYFA4": 1437366,
- "IbI-l7mbKO4": 3470258,
- "IbuT0iTWaDE": 63879692,
- "Icakt3gQDtE": 6330768,
- "Icp9eIVMBwU": 21545550,
- "Id2E72P8Fe0": 18305569,
- "Id6UovYjd-M": 580085,
- "Idxeo49szW0": 9970353,
- "IePCHjMeFkE": 8573038,
- "IeUiL5vzSzA": 22371983,
- "IelS2vg7JO8": 2631416,
- "If3KlMxbtcc": 7467712,
- "If4Ar9lnB_4": 21265762,
- "Ig7RSc-93Bs": 6445086,
- "IgYUR7aFY-c": 5786186,
- "Ihws0d-WLzU": 6885969,
- "IiBC4ngwH6E": 3597467,
- "IiKKAw38ss0": 13936305,
- "IiTtGENiVOA": 23991778,
- "Iics7KH_rLE": 18714344,
- "Iit8p6xzfr8": 8045914,
- "Ij_ERo1Ashc": 43789041,
- "IjbJZ5jspzE": 9923905,
- "IjcLW7Y7Ndk": 5603407,
- "IjiHwNLYLcM": 906570,
- "Ijret8P3kWM": 14424701,
- "IkmM4CPnqF0": 13720964,
- "IlFD0LzAZeo": 9800693,
- "ImZO2ytl9P4": 17565635,
- "Im_XjHgQfW0": 512553257,
- "InaCCSVotYw": 146734290,
- "IniG1KkPS2c": 8451312,
- "InrLtU3k3Y8": 4356802,
- "Io9i1JkKgN4": 2019578,
- "Ip6hmC2KIug": 50906459,
- "Iq7a2vEsT-o": 4530033,
- "IqgxqkkptKQ": 39881367,
- "Iqws-qzyZwc": 14722295,
- "Ir-J6a635UM": 31631857,
- "IrvEHVn-fks": 1182299,
- "It3i-dKusIM": 408988986,
- "ItW5CxLsLSo": 9340156,
- "IuBoeDihLUc": 11378086,
- "IvGVGxBoAdU": 23647072,
- "Iwmb1p25ws4": 28592682,
- "Ix8Nne-a-KQ": 4747102,
- "Iya-2bS14ho": 5840317,
- "IyoUWRAharQ": 46504635,
- "Iz6IVf8frjw": 5263565,
- "IzyheHIPBXU": 22166444,
- "J-NC1M6obKo": 3128339,
- "J-ftiWffNTc": 122896299,
- "J-o63pl0QWg": 2458310,
- "J0gXdEAaSiA": 9066478,
- "J0ndBMMQW20": 9178143,
- "J0tYHmuig-U": 5094645,
- "J0u_MugpslU": 1407667,
- "J1HAY8E3gms": 5904396,
- "J1twbrHel3o": 16082539,
- "J2L-X2sUigs": 22460675,
- "J2Qz-7ZWDAE": 2975464,
- "J30zpvbmw7s": 40979087,
- "J33nVRyTeyU": 26849317,
- "J4BN4dARpio": 4871786,
- "J4DdH8VBn88": 6504449,
- "J4gnfV7rz-4": 48839657,
- "J5iEY4hapMQ": 283810194,
- "J6-w7njIpgA": 8444967,
- "J7-GewgqWUQ": 21805964,
- "J8wW1t1JqUc": 12823132,
- "J97G6BeYW0I": 7871084,
- "J9BWNiOSGlc": 6211365,
- "J9_ouZpBknM": 93591597,
- "J9xUL5Yi_8M": 163499424,
- "JAXyLhvZ-Vg": 7042228,
- "JAdNNJynWM4": 4135013,
- "JAe14gwSvIU": 59694822,
- "JAg8IrTs5K0": 14071627,
- "JBOFe2nwob4": 57181217,
- "JBSDQLZtjFo": 10726415,
- "JBWdbzzYbtU": 8129198,
- "JC82Il2cjqA": 57915643,
- "JCKshDyxjuw": 68412434,
- "JC_TVyAMYE0": 4801622,
- "JCdbCdwqXbc": 8122096,
- "JDMkWZQjaE8": 22033371,
- "JDo9LNMOLtE": 9410090,
- "JEHejQphIYc": 2029669,
- "JELm6peL_sI": 27818564,
- "JEXhbd0JOWk": 375197575,
- "JEZaUvH2Eq8": 8525012,
- "JGU74wbZMLg": 10024242,
- "JHgTNNX01r4": 16125893,
- "JJOIiMdML54": 37407878,
- "JJawhaMqaXg": 2000879,
- "JK-8XNIoAkI": 18131380,
- "JKvmAexeMgY": 1912305,
- "JLTde8PxhQ8": 32884700,
- "JMsqu236bZo": 17382724,
- "JNL6f1xkie4": 11373991,
- "JNm3M9cqWyc": 10254351,
- "JNmCg3nNi1U": 25699597,
- "JNxXz3cQoNo": 18563954,
- "JOkEfbaaK-o": 122069930,
- "JPQ8cfOsYxo": 5657003,
- "JPYRpAVc83M": 217959130,
- "JPhd76sGIs8": 4764549,
- "JPoQeuWybIo": 94120407,
- "JQXB-ChOV20": 51244566,
- "JQ_Wojqtn7c": 6704758,
- "JRM7Cy7h-VE": 28995458,
- "JRrm8TfBj1c": 47339611,
- "JS3wsNY17LY": 9527829,
- "JTpXK2mENH4": 13334157,
- "JU67TL2L1CA": 3223249,
- "JULBDJx42DY": 650000670,
- "JUbjPICOVgA": 10461315,
- "JUgrBkPteTg": 14645228,
- "JUouea9XoF8": 6295601,
- "JVDrlTdzxiI": 11074990,
- "JVcbDb3e-6w": 16158050,
- "JVhwinCiELI": 201504450,
- "JVlfQEhzLMM": 4628533,
- "JVm-ePTIKR4": 13765093,
- "JVrkLIcA2qw": 4643021,
- "JVwp1m3wzvY": 85410071,
- "JVysGX05BEc": 85925072,
- "JWZ1QVn1tHM": 71878667,
- "JWmCiZwoyMs": 923282,
- "JXCiFbEMTZ4": 6251897,
- "JXVGPEOQCb8": 5764064,
- "JXeji_6wJAA": 46750254,
- "JYQqml4-4q4": 8348197,
- "JYxspCbwZVs": 6639686,
- "JZRY6Eco7BM": 18977477,
- "JaScdH47PYg": 2061696,
- "JbWGusfynCw": 72980763,
- "JbfVrwxuPxM": 3421678,
- "JcqCf762y9w": 2251624,
- "Jd53tcOqndI": 599763761,
- "JdqT5j6CFbE": 198006595,
- "Jdu1scUjIHQ": 19003582,
- "Je4GicbcyLU": 9689592,
- "Jeh5vudjmLI": 2175516,
- "JfZ38uHaTEk": 25021554,
- "Jfaipkw691E": 20196883,
- "JgYlogdtJDo": 46927412,
- "Jgliqx42_BA": 18399400,
- "Jh4UsA2see0": 272668189,
- "JhhueOO0iqU": 72255976,
- "JhpnZ8eR9wQ": 17026991,
- "Jhu1M53AF0E": 5333100,
- "JiE_kNk3ucI": 44954100,
- "JiofOv18o2M": 36943450,
- "JjtzMQDdyuM": 4903812,
- "Jkr4FSrNEVY": 10718453,
- "Jlh-7-BWUAw": 194136456,
- "JmHEZgAhq1Y": 278344824,
- "Jn5XIY8eqME": 2419291,
- "Jni7E2RH43s": 4871576,
- "Jnk_4Maf5Fk": 5890663,
- "JnpqlXN9Whw": 4570786,
- "Jo94CnblKcA": 9458252,
- "JoC_x3Hzkkc": 22585141,
- "JoFSRuJDp5o": 5397248,
- "JoGQYSTlOKo": 20739513,
- "JoL2pO3O0rg": 15036152,
- "Jp25LHI9wII": 19019589,
- "Jpbm5YgciqI": 2840886,
- "Jqgpq8vn_oU": 27169929,
- "JrTsNuUQXzU": 9850309,
- "Jsiy4TxgIME": 7990896,
- "Jts_mdQmbUg": 1938222,
- "JtsyP0tnVRY": 5011025,
- "JuVOwU0RcdA": 9071973,
- "JuWYLAtz3Y4": 9738047,
- "JvDpYlyKkNU": 2593336,
- "JxC2phkdY8Y": 52077613,
- "JxZ8WGsuuvI": 15608481,
- "JyArK4jw3XU": 4505081,
- "K078WCcmQ2c": 196147312,
- "K0GF4FT51qY": 5084911,
- "K0qH8EwiH2g": 142325873,
- "K0sjZ5nqQ7g": 7455886,
- "K1y6Tz_E7oA": 15046691,
- "K25N7ZfSaO0": 19975500,
- "K2b8iMPY11I": 4730875,
- "K2bGjTaNsnM": 20014349,
- "K2tIixiXGOM": 11667131,
- "K38zMmtjxEw": 3638551,
- "K3GV13uokbk": 1969200,
- "K3QjyP1OwYk": 28338075,
- "K3XTsNlcDS8": 5262182,
- "K4KDLWENXm0": 21879630,
- "K4RE-6AolEw": 5912527,
- "K4iEAnjZHuI": 32862006,
- "K4pocYXOmTQ": 8594078,
- "K57qjYYjgIY": 44222289,
- "K5ggNnKTmNM": 9031049,
- "K5rmfHlHy20": 3185753,
- "K6BKDveCd9w": 116042976,
- "K759mIqpvOU": 41036296,
- "K7IxN3EDqm4": 19522367,
- "K7XAk7EvLSc": 19252725,
- "K7dP25_Sebo": 14780638,
- "K8wwaXkT29Y": 950113,
- "K9RPyi0klYo": 52165157,
- "K9eZTm4TL2c": 38532532,
- "K9iMsmhBOjk": 63410636,
- "KAJVMnXad7g": 8519514,
- "KBOGRxV49MQ": 83546293,
- "KBsOwZRKzcE": 10001200,
- "KCSGeTdjWiI": 16850066,
- "KCehC_3CBBY": 1142321,
- "KD46pC_KFWk": 10214951,
- "KDHuWxy53uM": 7427949,
- "KDb3YEnM0WY": 35694024,
- "KFKJQtRLeds": 208042990,
- "KFgvOQtH0Z0": 10580995,
- "KFzcwWTEDDI": 1830105,
- "KIFdiufU8lc": 1518479,
- "KIvBn6gfRgY": 9999911,
- "KKAD-OOOHxg": 9233329,
- "KKEW_etByJo": 22701686,
- "KKJ6FVCHalA": 1851507,
- "KL0i1RSnpfI": 8388266,
- "KL6sMOn7ULo": 89455206,
- "KLnlPpVWi8Q": 7574637,
- "KMMAL3v0lA0": 11688532,
- "KM_maukQebY": 6461799,
- "KNGa11O2uLE": 7610425,
- "KNklNvGof8o": 15679324,
- "KNr52iFk7n4": 4546533,
- "KNrEAJeRIdo": 3216844,
- "KNtVlP9Htnk": 52055232,
- "KPeS2gdizhQ": 4895576,
- "KPh60w6McPI": 13240549,
- "KQ63wu7lsXo": 94656754,
- "KQOiHKT46zk": 30589237,
- "KRFiAlo7t1E": 5675893,
- "KSclrkk_Ako": 24796889,
- "KSrnZMAfwTM": 2151925,
- "KT32CsdEZEY": 2043158,
- "KURufM070oI": 867732,
- "KUSsRrOqynQ": 94498475,
- "KUhdMbx5ges": 8087806,
- "KV0hmkuS5ec": 49339798,
- "KVRpXvrsSKM": 7506136,
- "KV_XLL4K2Fw": 1256279,
- "KWf5kSNPbz0": 65051930,
- "KWv5PaoHwPA": 6620826,
- "KXDOOmquZag": 4083928,
- "KXZ6w91DioU": 9179741,
- "KXwYPD090Tg": 82175988,
- "KYoB2mjNdr0": 73693854,
- "KZibsVxUOrw": 197069521,
- "K_OI9LA54AA": 4020582,
- "K_PiPfYxtao": 4561712,
- "K_fgnCJOI8I": 19923666,
- "K_na_j1Msfg": 39212263,
- "K_uaUQY6MVQ": 7996633,
- "Ka82QC4QvGA": 6711390,
- "KaY8zqYfQI0": 208539353,
- "KbW6OiuRa1Y": 5000811,
- "KcFpkpHouPw": 1002964,
- "KcqO1fX9b_I": 3494331,
- "KdDIIYqXmjw": 192840211,
- "KdfSUbEFums": 1056886,
- "Ke8k8CNxwog": 5855307,
- "Kf9KhwryQNE": 8174937,
- "Kf9KjCKmDcU": 10598134,
- "KfTosrMs5W0": 8163415,
- "KgI07h9VgWM": 4289536,
- "Kgii4IcKCOg": 205139517,
- "KgoXx_58QyQ": 3759473,
- "KgrLUQYgIJE": 6962821,
- "Kh8HKAxdEyw": 3281999,
- "KhdX5eX4dMM": 9270303,
- "KhyDlw99aSY": 107630836,
- "Khzs4k2a-mw": 3732030,
- "KiVGac1aBt8": 5722950,
- "KibTbfkoPTs": 6179065,
- "KiouveG278Y": 11323563,
- "KjQ1KN5GgoE": 1719468,
- "Kjli0Gunkds": 12264653,
- "Kjlqcz5RiTw": 384000625,
- "KkJ0wL9f2VY": 12580949,
- "KkaU2ur3Ymw": 7365922,
- "Kl4Dcj9o570": 159955381,
- "KlKYvbigBqs": 3845326,
- "Km3Z7Ack2Dc": 13782777,
- "KmmFBC0gNSg": 40703820,
- "KoYZErFpZ5Q": 7880912,
- "KodGZFPc474": 12828391,
- "Kox-FerE8AY": 641919,
- "Kp4Dg8XBeUA": 14645396,
- "KpaLchFpJZ8": 7808845,
- "Kpov3GS6tjM": 6046716,
- "Kq0Er6JBMmc": 159444022,
- "KrP-_4jsk8o": 70018331,
- "KrXE_SzRoqw": 22690241,
- "KrkbbRxdDZ8": 3511191,
- "KsdZsWOsB84": 7441913,
- "Ksu1lo312BM": 5129462,
- "Kt7Dwr7BftE": 3736393,
- "KtkR_NTte4M": 5120542,
- "KuUMUvwvML8": 8701093,
- "Kuqm8Y3tUxY": 37612557,
- "Kv-hRvEOjuA": 16209060,
- "Kv2iHde7Xgw": 2923893,
- "Kv3feYibIUk": 127929337,
- "KvMyZY9upuA": 2077415,
- "KvvFTPsZxU4": 2979522,
- "KwNe9x0eChs": 63478658,
- "KwR_ysrv3sg": 6799083,
- "KwYhMXjMlvc": 24263902,
- "Kwk62Xw6YHU": 1080127,
- "KxM05gLQ654": 34503130,
- "KxOp3s9ottg": 7780353,
- "KyEk35-Uwh0": 13503295,
- "KyHvVJWjW6Y": 2560284,
- "KyJs9H0vzTM": 124808030,
- "KyUptMWcmZI": 19512095,
- "KyYC8XzKsHU": 3683075,
- "KzZF1lP4Rbk": 57070725,
- "KzaPBzFFLRM": 9028472,
- "L-0FkEPPdXE": 18845509,
- "L-0LuSw2bTM": 5845080,
- "L-_MvjcH0xk": 29383356,
- "L0CmbneYETs": 17474484,
- "L155lNA9Y0Y": 92784052,
- "L1qpKn2hNF0": 207860584,
- "L3Ka3oRD8G8": 40340146,
- "L3SIooVHV8E": 238300269,
- "L3nH3KTNS3E": 17886295,
- "L4F2lgyi7FA": 32974508,
- "L5ErlC0COxI": 13277731,
- "L5OkFR8GScU": 104972440,
- "L5eBJjx2FP8": 3853412,
- "L677-Fl0joY": 34696373,
- "L67dlpMgDa4": 61799111,
- "L70uKS_4wGM": 117254746,
- "L72h7bk6HZs": 30818288,
- "L7P3kBJ3scg": 91272750,
- "L82bDTBMGUU": 5243478,
- "L87VpmRLAPg": 61972855,
- "L8NrBjd1aNo": 81093835,
- "L8ifD4I1o38": 14605385,
- "LAUJuLEZ9HA": 807195,
- "LBNtChg4t4k": 51376318,
- "LC5I8BsO18I": 56049999,
- "LDDKjQ-0jss": 8629357,
- "LDuJ1AD7n54": 3876685,
- "LDyMYyiAsQs": 8764775,
- "LEFE1km5ROY": 4989404,
- "LE_aQAur7nI": 2676301,
- "LFA_qmGuY2A": 102842058,
- "LG6H_8BU-f4": 6651685,
- "LG6g7gxupHg": 4677408,
- "LHPOLSywdi0": 29716331,
- "LHnHXS51J4E": 4936081,
- "LIFHYUGrYqw": 854596,
- "LJTJN1sqCHM": 1216740,
- "LJmFbcaxDPE": 9421972,
- "LJqNdG6Y2cM": 5361762,
- "LKv0hRyiGCY": 54341206,
- "LKzpw_HUKNQ": 7366805,
- "LLKX_4DHE3I": 19920899,
- "LMHxxvbzFqc": 4839471,
- "LMO-o9zZWC0": 50846065,
- "LMfPceMzLWg": 21247315,
- "LNSB0N6esPU": 14401097,
- "LO7-3MpWijU": 19723390,
- "LOf8bfjiLow": 2925077,
- "LOiw5aBrm4Y": 21300474,
- "LOjTSgNyiFQ": 395609992,
- "LPYTndFFTko": 5827633,
- "LPZ5C3CgavE": 66618742,
- "LR0h_oMCsZ4": 28159744,
- "LRlVWC0FMQc": 2516627,
- "LRmwUsxNSL0": 9425653,
- "LSG6w2Np_rk": 60862908,
- "LSIgi9krswU": 2081988,
- "LSJuu4Qm2qQ": 5720051,
- "LSaaKau63Gg": 2404838,
- "LSnZ0ZX60hI": 238495083,
- "LSu1HGjPFm4": 6139930,
- "LTZKp8nOhVU": 3901171,
- "LTuGQy4rmmo": 7846674,
- "LU_6amWC6H8": 5974577,
- "LUoUb4hGMH8": 11633568,
- "LVMLs2z1JYg": 4440706,
- "LWtXthfG9_M": 30254341,
- "LWwGfQ8fBwA": 50425814,
- "LXFQG4Ugreo": 12120185,
- "LXaPt9i9hqk": 7156052,
- "LXi5FUMNTjE": 73064605,
- "LXrPdFn7Gn4": 8217529,
- "L_lCAaTKIRE": 14154412,
- "LaEokkaZkrw": 8059663,
- "LbTH7MGMNjk": 5320170,
- "LcEqOzNov4E": 7726990,
- "LccmkSz-Y-w": 8025225,
- "LcyEXlCIkmA": 33067569,
- "Ld7Vxb5XV6A": 3061019,
- "LeZsfzlbje4": 79802208,
- "LfBXhLfE_WM": 7648029,
- "Lh7NMBPFVZw": 4379963,
- "LhFXw1xmaSM": 17638719,
- "LhMEqsL_M5o": 2699918,
- "Lhop0mfeJMQ": 10339235,
- "LhrGS4-Dd9I": 8496754,
- "LiOfeSsjrB8": 16612163,
- "LiPQuOFVHl4": 67632155,
- "LieVEfI4luw": 11385724,
- "LinNW-GIlP0": 103879175,
- "LjC-H-RAclc": 8296773,
- "LkjyVZMyMaY": 53712036,
- "LlKvubIqHc8": 8260823,
- "Llt-KkHugRQ": 3220098,
- "Lmd_CDwBXFs": 2622378,
- "LnPKrSVMLnQ": 23267291,
- "Lo-ajwD953o": 35093376,
- "LoKEPEPaNm4": 3487608,
- "LoaBd-sPzkU": 6270430,
- "LoaagZPWvpM": 37867846,
- "LohXZt7QzCM": 3830157,
- "Loy1zLkbuF0": 4238832,
- "LpLnmuAyNWg": 1086368,
- "LpY8Qa3IP1w": 11581645,
- "LplRIAd66pc": 8109537,
- "Lq-zp5_OgSY": 2876107,
- "LqNogu68JQQ": 12499217,
- "LqyA96oYtwE": 6407739,
- "LrS5_l-gk94": 6892495,
- "LrTn4cvsewk": 1881024,
- "Lru0vKmkzR8": 7078720,
- "LrxZMdQ6tiw": 6326201,
- "LsNwC7LpY50": 12148367,
- "LsPqeS5I_QM": 189051803,
- "LsvqEN3XVX4": 20816404,
- "LtGoBZ4D4_E": 52050947,
- "LtlodYLm8fc": 15360304,
- "Lto6oQcGF_8": 4669569,
- "LtpXvUCrgrM": 12677389,
- "LunoLU3XFKc": 21412804,
- "LvoONWiXJ5I": 32701342,
- "Lvr2YsxG10o": 2756030,
- "LwA00uqniiU": 19134794,
- "LwF9nTEB84k": 56307331,
- "LwhJVURumAA": 5885933,
- "LxnX9-xUMvs": 29801977,
- "Ly2-n1KqNko": 91330229,
- "Ly86lwq_2gc": 8081583,
- "LyIZEnGYCI8": 3545712,
- "Lz7mV3jz324": 36872965,
- "LzYJVsvqS50": 1959868,
- "LzkL0Iik2B8": 18055064,
- "Lzr9GGjh6YQ": 21823265,
- "M-0qt6tdHzk": 3451433,
- "M-4GWomLbpc": 10435580,
- "M-9t4RrhKJE": 16194458,
- "M-WK4kpvAPw": 16095657,
- "M-aktLHDZEA": 5578508,
- "M-jLsoA1i_o": 64088324,
- "M0Nf2Osgwkc": 104625171,
- "M3FuL9qKTBs": 22626411,
- "M3PTPN7NH8M": 4405715,
- "M5AxwBJ3pT0": 35665811,
- "M5mH0u0b4W4": 2145273,
- "M5uOIy-JTmo": 16709743,
- "M6lFqkqvUgo": 29337520,
- "M7NVKImDqGg": 1408432,
- "M7PnxSQedkM": 4465512,
- "M7eAyjGZd-4": 10959583,
- "M7yd8F3eay4": 10449652,
- "M8Cbv0yptNE": 1439654,
- "M8TOJrI6cJc": 7880046,
- "M8oITAoaCr4": 54812849,
- "M9bisHkXbKc": 7258727,
- "MABWdzmZFIQ": 4106984,
- "MALIJQ3Q_zs": 8048092,
- "MAS6mBRZZXA": 13268339,
- "MAV3ZT9Byew": 54899632,
- "MC0tq6fNRwU": 8210962,
- "MC7l96tW8V8": 17576286,
- "MC8Mc6tSjYI": 4444236,
- "MCL1qhlSq1Y": 39552658,
- "MDhgIUduCBI": 67547655,
- "MEGyRgYJKEY": 52528855,
- "MEN0CzGv5-Y": 18169875,
- "MFMutlhgfzI": 17494827,
- "MFoXK57sw9k": 2253063,
- "MFt3tHNevJg": 47626510,
- "MGF0jSP3Txo": 14929113,
- "MHWmBggmIU0": 4377229,
- "MHgi8ZQCG0I": 10729285,
- "MHtTP6vc4RU": 3759530,
- "MHuUBkyF8KI": 141725236,
- "MIAmN5kgp3k": 34984812,
- "MILF-9GeMDQ": 10875999,
- "MJBjGnR6vlk": 10103330,
- "MJIagUN4Lhw": 256973351,
- "MK-dN5WVVrk": 5397348,
- "MKErxh58RME": 4895147,
- "MKWBx78L7Qg": 3254640,
- "MKnI3425EMI": 25329377,
- "MLj-PpvqlPs": 8697748,
- "MLobRZk4SF8": 48396341,
- "MM0FTzvedH4": 5738645,
- "MMv-027KEqU": 2272278,
- "MN4SWiEEqKo": 11469221,
- "MNKXq7c3eQU": 19429155,
- "MNUVuZu6heA": 3634755,
- "MNbat1lrJW4": 23258111,
- "MODnIkQvyz0": 26158180,
- "MOHzzgQLkk8": 51892203,
- "MOoGlIpNLkM": 2841378,
- "MQct5EFQ9x8": 25575855,
- "MQfzFjedKeo": 48704091,
- "MQtsRYPx3v0": 3656688,
- "MR9CrsF3D00": 4792879,
- "MRAIgJmRmag": 7584091,
- "MRv20I13vqM": 32258577,
- "MS7x2hDEhrw": 27644822,
- "MSucylf4KhY": 11056927,
- "MT4akJsAmb0": 20364006,
- "MT4niL7TCLY": 81387290,
- "MTPHXNMi9tA": 65560924,
- "MTzTqvzWzm8": 17089558,
- "MUQfl385Yug": 4078874,
- "MVHy_hbKSa4": 37034620,
- "MWii7tL0T84": 17508815,
- "MYkR32QOdg0": 2761450,
- "MZQxeQYQCUg": 2738433,
- "MZl6Mna0leQ": 4856968,
- "MZpULgKhaEU": 2846136,
- "MZz4OUOyFvg": 12436869,
- "M_1WJIzLb8k": 12865207,
- "M_5KYncYNyc": 18103728,
- "M_ADc9jkBig": 4403441,
- "M_VqY1rf3UA": 24362896,
- "Ma9YxZiBiRU": 26417721,
- "MaMk6-f3T9k": 6180079,
- "MamrTJ7V_Vg": 4275801,
- "MarqSlyz-lU": 2458127,
- "Mawq5PKRB6k": 62159218,
- "Mb9TudBudWk": 7583146,
- "Mboz5JIIwSU": 394344,
- "MbpmP1esh-Q": 1472483,
- "McH0dsTOg2E": 45307835,
- "McINBOFCGH8": 4466361,
- "Mci8Cuik_Gw": 3127410,
- "Mcm0Q3wGhMo": 2353550,
- "MdIfefLcdoU": 8314393,
- "Mdk2HeiDUqQ": 17121507,
- "Me8BrHY57JI": 14851553,
- "MeU-KzdCBps": 15527505,
- "MeVFZjT-ABM": 6480158,
- "Me_041nrRZk": 28620502,
- "MfOoWkH2NUA": 2514818,
- "MfWGyjU32Xs": 10518389,
- "MhLfun2Vask": 5580743,
- "MhavOq8O0Ho": 10384607,
- "MiAhPIUno1o": 21794254,
- "Mioqyv_IW3E": 4842261,
- "MiyFReTAdCA": 6137891,
- "MkGXR8umLco": 7824471,
- "MkpbtCRwcCE": 811229,
- "MlMwMqM_Wsg": 34174905,
- "Mm-IxK1GrYE": 23848454,
- "Mm7ZmL9zfpQ": 7488696,
- "MmRgMAZyYN0": 18422061,
- "Mmev06nabvk": 21813723,
- "Mn4D4eQxeMU": 27889812,
- "MnQ7Lizkpqk": 1650783,
- "MoCuVa9UeR4": 26309164,
- "MokI3Fi8jpc": 2882269,
- "MpRUEGD2-_c": 7292006,
- "MpZEjEO_Sbg": 6701349,
- "MpiM4C26sbY": 34563613,
- "MsqqpO9R5Hc": 14792411,
- "Msrym4oGVSk": 21581173,
- "Mt4dpGFVsYc": 6559900,
- "MtRXjXdXDow": 8706198,
- "MtwvLru62Qw": 13068013,
- "Mu2pqXgArxY": 4609542,
- "MuD06cnjtAM": 96145390,
- "Muba9-W2FOQ": 4894305,
- "MufbvU4tGh8": 1088904,
- "Muh0cQVr4xk": 13120157,
- "MvMI2r1RS78": 74091919,
- "MvkqmSPXKWA": 10931266,
- "MwG6QD352yc": 9652736,
- "MwdwuDy0rRs": 5856202,
- "Mx59hYSFCeA": 9193114,
- "Mx7KM-k2MMo": 16644924,
- "MxDP1B5mKWA": 28283390,
- "MxE1IJvz-oA": 29511986,
- "MxJ7taVhYwA": 19138971,
- "MxiqyE2uMCo": 3410381,
- "MxyQgpgc7Ds": 103635085,
- "MyanDgvTb2g": 55082993,
- "MyvRxKM0xns": 8341508,
- "MyzGVbCHh5M": 12253894,
- "Mz2nDXElcoM": 10197838,
- "MzY6PTY0Bks": 40753291,
- "N-7tcTIrers": 273486124,
- "N-mAEwzCwMM": 21269334,
- "N-mt2tiRJ7U": 11354429,
- "N-vIfz4o6PA": 16280158,
- "N06Jy-gQog8": 9248314,
- "N0Ambe4FwQk": 41160100,
- "N0L00FZnhtg": 5987850,
- "N0Y8ia57C24": 11354919,
- "N1GWZbwh2jQ": 285391955,
- "N1X0vf5PUz4": 5196584,
- "N21Wh4Jqftc": 2668873,
- "N2c78pv7f1g": 26632526,
- "N30tN9158Kc": 7442658,
- "N3jnRuzseoM": 13270038,
- "N44RZtJ4jj4": 12540528,
- "N4kDzoQOngY": 3442345,
- "N4nrdf0yYfM": 23833724,
- "N5kkwVoAtkc": 9087307,
- "N8GQQJZQrUc": 28201907,
- "N8dIOmk_lHs": 5247757,
- "N8h45mDI80s": 3563013,
- "N984XGLjQfs": 16937180,
- "N9VIsauE0RA": 5492861,
- "N9hXqzkH7YA": 70349040,
- "NAW1pqHs2_c": 10196220,
- "NBxUKzOHFF0": 23659486,
- "NC7iWEQ9Kug": 5955946,
- "NCF4m8BDs7w": 3758162,
- "NCu83PcEQ1U": 142921295,
- "NCwwfvPEVn8": 12814026,
- "ND-Bbp_q46s": 4693295,
- "NDXHVKOg8BQ": 35373851,
- "NDwX4zm_0kc": 17515359,
- "NEaLgGi4Vh4": 2199716,
- "NEzJH-JrAdw": 36301113,
- "NF0lrkqXIkQ": 25061945,
- "NFDMXwwzyIM": 8215181,
- "NFiDdbquWJY": 35625343,
- "NFmDz1dQyPU": 2933361,
- "NFzma7NsHtI": 2706161,
- "NG-rrorZcM8": 12527926,
- "NG7nbAcAFNc": 26771847,
- "NGpJPz44JYc": 8308324,
- "NH1_sO8QY3o": 7382905,
- "NIJDn2MAn9I": 17471064,
- "NIazpCER9oM": 11828857,
- "NIdqkwocNuE": 7152426,
- "NIhELmGSqM8": 31487287,
- "NJRyxmommqQ": 9204371,
- "NJsLHcL3Bvs": 28188744,
- "NLg6hfoKKlE": 7653614,
- "NM0WycKCCDU": 12448373,
- "NM8qTo361ic": 1972364,
- "NMZ5kJEviD0": 10406357,
- "NNhyZFHAzaA": 6606979,
- "NOsnG2DkGKM": 2772619,
- "NQFiGK0M69s": 18294232,
- "NQSN00zL5gg": 2434895,
- "NQazgcu8c7s": 14730939,
- "NR3779ef9yQ": 55383952,
- "NRFPvLp3r3g": 8179601,
- "NRJFZaSw1Y0": 1419788,
- "NRS2ZJVVzOI": 2417600,
- "NRsM8kXtT5s": 6125258,
- "NSPrIjA6T-c": 14723004,
- "NSSoMafbBqQ": 3244851,
- "NT0SHjOowLA": 256536764,
- "NTUjMpfYWwE": 5460604,
- "NU1v-8VRirU": 11769821,
- "NUu0_Zn55yM": 14375507,
- "NUyYlRxMtcs": 15441620,
- "NVSFyfli12I": 43798946,
- "NW9JfMvIsxw": 9338852,
- "NWJN80g1YVQ": 79228486,
- "NWJinKmWzx8": 6989776,
- "NWffcD7jcEo": 105665414,
- "NX0ZPtB_QFY": 10779246,
- "NX3M0NTYTYg": 15490225,
- "NXeZk1umylo": 27533405,
- "NYEVx5QFavU": 3433819,
- "NYI0bJK64MY": 13723648,
- "NYd6wzYkQIM": 14874812,
- "NYtPw0WiUCo": 17792992,
- "NZINmtuTSu0": 542524620,
- "NZlJJ4a40Ww": 4497356,
- "N_ZHnirms3A": 217236351,
- "NaAwVrOEyss": 15256663,
- "NaO01BO8X70": 40754245,
- "NaZTlnDlnOA": 28877349,
- "Nb6EQUS8hDo": 22613548,
- "Nb_4nEFyeGk": 54502282,
- "NcADzGz3bSI": 8695458,
- "Ncg1HB5uVLc": 8550619,
- "NdRl1C6Jr5o": 13912656,
- "NehkLV77ITk": 3139610,
- "NeujZgfq7hA": 6902301,
- "NfU7cmajLAY": 4295353,
- "NgPqyM3I_8o": 8039351,
- "NgYrsqoKXpM": 15123169,
- "NgsuPTLkPgs": 6987946,
- "NguAe9lf_wk": 112808429,
- "Ngv0Be9NxAw": 9916944,
- "NhioAAdYDJM": 10710806,
- "NhkfQEkmwlE": 4309997,
- "NhllG85qiwg": 54619818,
- "NigP3DjV3NY": 16776720,
- "NjJFJ7ge_qk": 2205448,
- "Nk2q-_jkJVs": 7383004,
- "Nk4DmlnoLxw": 97593344,
- "NnjN9GGfV6E": 117276961,
- "NnlAI4ZiUrQ": 5823808,
- "Nnqp_3HMlDU": 8653043,
- "NoCW80MEGXY": 86379274,
- "Nok4cBt0V6w": 198421045,
- "NpVL1AjTv_E": 14954775,
- "NpWxl4C0OWU": 10887061,
- "NpuvcuzXn9w": 19209129,
- "Nq88IHw4Y9E": 2873346,
- "NqR_dtZu4Mo": 10797016,
- "NqasGo5q5yQ": 12584639,
- "NqbkvEK46xM": 2794356,
- "Nqts8zW8RxM": 4358854,
- "NrIf451oN30": 8189339,
- "NrVvu7cM8_o": 4244688,
- "NtvJirrHhZM": 28175694,
- "NuLlNAdrom4": 6768182,
- "Nu_6X04EGHk": 63360430,
- "NuccqpiUHrk": 1702389,
- "Nue0DINMRPM": 14870196,
- "NvGTCzAfvr0": 2679966,
- "Nwh4MUie74E": 2470518,
- "Ny0b9xO2sgY": 10399021,
- "Ny8a3eNG68M": 17252354,
- "NzIoHQfStoM": 1898131,
- "O-Onby3soVo": 10955977,
- "O0uUVH8dRiU": 13354746,
- "O1-9f1g0OsI": 3230619,
- "O1N2rENXq_Y": 23173685,
- "O1R4H3Ca82E": 3137772,
- "O23i38B2EmA": 13772528,
- "O33b6B12YxI": 6708386,
- "O3A47Il5h1A": 8181634,
- "O3HxPDH-s7w": 61286086,
- "O3elOBXBcCM": 44494007,
- "O3jvUZ8wvZs": 5176137,
- "O4Qnsubo2tg": 4271020,
- "O4St29B7cmU": 52627593,
- "O4obs4eldnc": 73598992,
- "O5gN-IK6uKs": 8512522,
- "O64YFlX1_aI": 3160054,
- "O8vB1eInP_8": 7157384,
- "O9RPGJcAfJk": 6327600,
- "O9lL2KStW9s": 18816948,
- "O9zSHs1TWMM": 1827269,
- "OB8b8aDGLgE": 10113634,
- "OBVGQt1Eeug": 7587295,
- "OC0oM6_O8QM": 26927624,
- "OCD4Dr3kmmA": 16605853,
- "OCNXS_m1HWU": 4767956,
- "OCYZTg3jahU": 22892298,
- "OCwLwaAQlMA": 2004912,
- "OE0MMIyMTNU": 11651605,
- "OFBI_rNDZE0": 1916766,
- "OFNGpKGg9IQ": 4728961,
- "OFXY9-pec1I": 20733859,
- "OGVJfcSckUs": 3655060,
- "OJ-wajo6oa4": 2972437,
- "OJhdag89Pq4": 67979863,
- "OLO64d4Y1qI": 2334048,
- "OLWvKdV4PHg": 32192611,
- "OM3e-J3euXo": 7413854,
- "OMA2Mwo0aZg": 4176760,
- "OMEDRrGpybY": 193935593,
- "ONBJo7dXJm8": 10680701,
- "ONPYKR8jNn8": 67408718,
- "ONc7qR1uCPo": 167780017,
- "OOim0QPsJ9o": 9357086,
- "OP91XWBRI1w": 4965479,
- "OPAvXQsPCqQ": 7386303,
- "OPpmp-kAuE4": 5005903,
- "OQEWArXaCeg": 8064952,
- "OQOnc3Z1uhc": 202454765,
- "OQpFFiLdE0E": 30234458,
- "ORES6xSf4KI": 69467168,
- "ORTI4kk1okM": 5872723,
- "OS1g4PDdNdM": 698939,
- "OS4Q5TN8oJU": 50469783,
- "OSrvGMacWD0": 3892668,
- "OU9sWHk_dlw": 680875,
- "OUrwdqwzqMU": 25710199,
- "OVM68-0YVWI": 33748791,
- "OVMceVL_CEQ": 3122887,
- "OVzIjV0yRmw": 15345027,
- "OW0Yq2nWyuY": 12293611,
- "OWPVZoxNe-U": 2946796,
- "OXREZOoNt7M": 30940153,
- "OY79AuGZDNI": 19078369,
- "OZ9IP0xeQho": 13270140,
- "OZbM1h3S-aA": 243335002,
- "OZdmaf2R9ys": 6562191,
- "OZtqz_xw0SQ": 7010516,
- "O_Oozju3RRI": 10308437,
- "O_nY1TM2RZM": 14293136,
- "Oa6dezr0JkE": 8217531,
- "OanPzjf2EYY": 4026497,
- "Obch1OP5QyA": 1395939,
- "Oc1XmBVyXMk": 10880509,
- "Oc8sWN_jNF4": 262599684,
- "OcNt-36QKu8": 6495447,
- "OcUMAHfo9MA": 72604551,
- "Oe1PKI_6-38": 1558114,
- "OelluIKIkCY": 5150499,
- "Of8ezQj1hRk": 1977614,
- "OgTpVth-aUk": 19215899,
- "Oga0K4reWoY": 41662760,
- "Oges5YqDLHY": 23209010,
- "OgxsswJEZ7k": 7794996,
- "Oh4H3BJX1ZI": 15650321,
- "OhAAi3DZ984": 13231441,
- "OhISsmqv4_8": 6540867,
- "OhJKDqZgNXg": 40633156,
- "OhRr26AfFBU": 16084483,
- "OhUkMQtBGmE": 13829837,
- "Oh_Pt_UrtEE": 7330164,
- "OiBnhcEA8M4": 8399422,
- "OiNh2DswFt4": 5532218,
- "OiSTT4z4zJI": 7941810,
- "OjF765iVuF8": 3398704,
- "OjzfQDFf7Uk": 17465856,
- "OkFdDqW9xxM": 6776041,
- "OlYwHNKN-qw": 79931664,
- "OmLl6pkvV-I": 3438935,
- "OmVBfdmWItk": 30189682,
- "OmWyMLucEbE": 16962939,
- "On3c86V5A_E": 8780498,
- "OnMgmzH1koQ": 51242424,
- "Onkd8tChC2A": 9245950,
- "OnlHXSBv0M4": 26313535,
- "Oo2vGhVkvDo": 3773418,
- "OoQ16YCYksw": 62396621,
- "OpyTJbzA7Fk": 19123846,
- "OqRt723t33o": 7747817,
- "Oqhe31kjlQM": 167114477,
- "OrCoshLAOiQ": 7083680,
- "OrRDNKNHtlg": 8012868,
- "Osl6HEDZZ-E": 5459728,
- "Ot0FxL8Vl7I": 5552661,
- "Ot1We4_EfRE": 20367013,
- "OtmjNuiTHp0": 5990321,
- "OuaBg3Hjqoc": 3600689,
- "OvMBNVi5bLY": 17717882,
- "OvRAIlok3fA": 8759446,
- "Ovype5DUI04": 17440362,
- "OwDXViQn6tw": 38279653,
- "OwPSuHXmiPw": 16460150,
- "OxaG0VxaVXw": 2457321,
- "Oxt1DdfT8ME": 51497529,
- "OzDmEA8x0nQ": 21878235,
- "OzLoUCCASwM": 9425868,
- "OzTqWpAPnrw": 8013061,
- "OzyH-1p9nAg": 43161678,
- "P-1mWGeJjmg": 42959725,
- "P0ZgqB44Do4": 14407726,
- "P0nMnPPdW_k": 9982402,
- "P1DJxuG7U9A": 3612944,
- "P1Lw1NVcI8o": 83204895,
- "P1paaFPcdak": 61862155,
- "P2IWGlR1SHs": 6999018,
- "P2WD9jFePwo": 9966460,
- "P35LyN9g0oI": 3284486,
- "P3IlneCNm8A": 5461940,
- "P3QV9ktuYlQ": 7695117,
- "P3zyEtO6viY": 1494832,
- "P4DiY4DvvmY": 6779343,
- "P4jM6he-AZ0": 150259436,
- "P4s0bnrRm4M": 13813256,
- "P6PEf9WtEvs": 3611257,
- "P6_sK8hRWCA": 1695781,
- "P7LKEkcNibo": 8014821,
- "P7OYvxG_iFc": 77246639,
- "P7mCn-_BDH4": 53322461,
- "P8wRDGEl4F8": 109704695,
- "P9lTAUtnreo": 186542944,
- "P9s3YA-glNk": 95165728,
- "PA-T6lMxCBI": 9424098,
- "PASajlCGBTw": 7040970,
- "PATkTJhAUhM": 237458442,
- "PCOevYD9cb4": 10229618,
- "PC_FoyewoIs": 6052757,
- "PDKPsHuz80k": 92427984,
- "PDReqvXfkBA": 1985014,
- "PEE3B8Fsuc0": 227696190,
- "PEMkfgrifDw": 7473379,
- "PEeUTQ0Gri8": 2489538,
- "PErhLkQcpZ8": 20357750,
- "PF6_y4zYVec": 3722298,
- "PF7m1fFr2eQ": 6576204,
- "PFcGiMLwjeY": 13316057,
- "PI01CwKmiZE": 8262569,
- "PI5WiM98S8U": 70869965,
- "PI9DjVjeV2A": 58222132,
- "PIM4G3IZk5Y": 19706172,
- "PIdgHAOoIKs": 54871361,
- "PJFzqfLMBIw": 8183211,
- "PJHbPlC2Qfc": 9383567,
- "PJgRZA5mE0s": 11317554,
- "PK4mJ2F9lvA": 2684763,
- "PK6HmIe2EAg": 6948964,
- "PK_JXzYcme0": 12242251,
- "PKh5B9xyzSc": 4722204,
- "PL9UYj2awDc": 3771607,
- "PLPNQMPDoNo": 901365,
- "PLjyj1FJqig": 2489157,
- "PMNIEfo6vZY": 48831758,
- "PMtC34pzKGc": 20016628,
- "PNXozoJWsWc": 8115702,
- "POrFhETplGs": 6303480,
- "PP61GER5vno": 64485945,
- "PP7T8vpT2KI": 8471761,
- "PPJ0Khs7uWs": 175491598,
- "PPOIlLhsT6s": 7618453,
- "PPvd4X3Wv5I": 1935586,
- "PPyqEsyVmIQ": 138141363,
- "PQ48N5jaG2w": 17207968,
- "PQZUIGzinZA": 131447768,
- "PQiXRrT_14o": 9253431,
- "PQsgXNggV7Q": 1670941,
- "PQyQadCqLAI": 15543612,
- "PR-A3UAO7_0": 15266754,
- "PRl8TLUleZg": 47604132,
- "PSDQdwL1T0M": 23585963,
- "PSy6zQsk8z0": 276458565,
- "PV5u5xskBKM": 10378761,
- "PWUuGDovHEI": 20079034,
- "PWiWkqHmum0": 6892441,
- "PX7EZPcamk8": 2773042,
- "PXKHyT__B2k": 2817077,
- "PX_XSnVWlNc": 3799046,
- "PXlvKtpvUEk": 3532756,
- "PXxwZDbQ3Lg": 190735235,
- "PYZhVX6rr08": 8294883,
- "PYd99ItlLEc": 3298354,
- "PYkaoQc-fLU": 8795598,
- "PZIoFD_Z73M": 17339393,
- "PZQTxPbvO64": 23659220,
- "P_HHvi7Kwzk": 21050868,
- "PaA0mLVQd3k": 9882481,
- "Pb04ntcDJcQ": 11018977,
- "Pb9V374iOas": 3025311,
- "PdHSs5_kx24": 3559132,
- "PdSzruR5OeE": 9497576,
- "PddbEVNMgTY": 14507222,
- "Pfg9FY1Fguc": 23471363,
- "Pgq0LThW7QA": 77267445,
- "Ph8_diBYnGM": 9595853,
- "PhO2gshIVuE": 1483967729,
- "PhfbEr2btGQ": 8618335,
- "Phu1yteO-HU": 23985770,
- "PiQxA9O7Rd8": 2543340,
- "PiuhTj0zCf4": 21244046,
- "PixZzV4Iz1M": 961189,
- "Pj3HdzOR2pY": 133157793,
- "PjLQrZRg-WI": 82877287,
- "Pk4d9lY48GI": 15553564,
- "Pk6s2OlKzKQ": 19755104,
- "PkzACPGZcVk": 36248270,
- "Pl7nzXaVqak": 10008686,
- "PlY3e_-9JUA": 1997540,
- "Pms4cBWwPSU": 31375764,
- "Pn1sjx3RH9Y": 3856286,
- "Pn24jP0YbTI": 149515261,
- "Pn5YEMwQb4Y": 7594977,
- "PoHKNFGbwjM": 628527324,
- "PpJMTpTukzE": 1584804,
- "PpUWpxAb39w": 3329313,
- "PpvexFbd8e8": 5258719,
- "PqRx4OV5jhM": 82113759,
- "Pr_-cUA_PY8": 25667806,
- "PrsWs8Pmjao": 67000026,
- "PsNidCBr5II": 22397918,
- "Psl3LWRAysQ": 10110516,
- "Pt-Tn6L60-o": 1428007,
- "PtKAeihnbv0": 18158689,
- "PtmzfpV6CDE": 69618092,
- "Pu1WCHsYfKQ": 21872222,
- "PuRsXST9EZU": 3926556,
- "PueYywpkJW8": 121052119,
- "PupNgv49_WY": 6903035,
- "PvSx8oJ7PrM": 1578861,
- "PvoigrzODdE": 16075303,
- "PwDnpb_ZJvc": 2299272,
- "PwH4oEz94qE": 25711660,
- "PxAHbuyBvBY": 157994517,
- "PxCTyVQMVbs": 119017540,
- "Py1dEFKuJJU": 58918591,
- "PySVsEUnrng": 8782790,
- "PywR3Pn7ZlU": 21244501,
- "Pz-uLRZS8YM": 28330929,
- "PzDthFTzEa0": 6162832,
- "Pz_ZICqJuc8": 49075134,
- "PzmKc8leu9o": 3121795,
- "Q0meIMQJ73I": 11231596,
- "Q0rGqxpOZM4": 164824853,
- "Q0tTfe2lKIc": 31869297,
- "Q1XPg-2KB_A": 69780546,
- "Q1j-gPKAcDA": 121503426,
- "Q1u51peRHmA": 23854997,
- "Q1vMNyIP4Us": 1080209,
- "Q35CH9B3tvc": 4357914,
- "Q3DpCMAyWyw": 69320042,
- "Q3wfb0CPhIY": 2470260,
- "Q48ddBmCjQA": 171446887,
- "Q4Z3W1RXh_g": 136504142,
- "Q59w-ACX30M": 7926993,
- "Q5IWDhXtsmE": 59750944,
- "Q7HbtnOyKMg": 7469654,
- "Q7Qj1debVMM": 28135852,
- "Q7UL8hvlk7k": 11960509,
- "Q7htxHDN8LE": 4841706,
- "Q8uhzlJ5tws": 11888268,
- "Q94h1W5H1Nk": 38588319,
- "Q9BtOLDr0vg": 24444391,
- "Q9t1LghwdGc": 11239008,
- "QA2TBiIsdT0": 13054106,
- "QCTKPkemffw": 451201,
- "QCkn5bu8GgM": 10124955,
- "QDvKqUc7Mj4": 1806890,
- "QE2uR6Z-NcU": 10030373,
- "QEA30X4ysvg": 115122378,
- "QEUsZeKYsgo": 12214065,
- "QEjWLj5wAFM": 40097556,
- "QExvrgjEqoQ": 9308266,
- "QGfdhqbilY8": 9518090,
- "QH1g-pVS0ZY": 33286476,
- "QH3kj7aeXHc": 20807848,
- "QHT2VMayiz4": 32293034,
- "QI6x0KNxiCs": 12968583,
- "QIAI6KOwKII": 63193889,
- "QIU1daMN8fw": 6696600,
- "QJQOg6umUxA": 28746364,
- "QKUOYpsbROk": 7686290,
- "QKghZNGL3eM": 36840987,
- "QM4f1vos6Vk": 36999149,
- "QMv4kxATfzs": 5029687,
- "QN231qRvkr0": 29671118,
- "QNB9hnRfgdk": 45458539,
- "QNN2LFe_iD8": 124402779,
- "QOTjdgmNqlg": 22757560,
- "QOtam19NQcQ": 1996519,
- "QOtyTZGWOmg": 7922907,
- "QP8ImP6NCk8": 52576617,
- "QPvhl66QCqo": 3336336,
- "QQMZ1ljepWg": 14368048,
- "QQsBM1dZLO4": 4945812,
- "QR2vxfwiHAU": 10003769,
- "QR9K8M4u8rk": 8506004,
- "QRPRmRAOCog": 11751621,
- "QS1LMomm0Gk": 5166621,
- "QTVDRbLX2_o": 12595871,
- "QTcSBB3uVP0": 12517093,
- "QUJ-xnv53UM": 39661641,
- "QUem_2dkB9I": 1669540,
- "QV0jsTiobU4": 9366834,
- "QVHuSq_793A": 15113544,
- "QVxqgxVtKbs": 4616189,
- "QW5zeVy8aE0": 15922470,
- "QWJprYEoIFE": 4874394,
- "QWLcNxQ3KvQ": 2330854,
- "QWX39H9kKvE": 2510375,
- "QWaUCFccvPk": 41092768,
- "QWninXOAMXE": 9431709,
- "QX2YLR09Q78": 8517596,
- "QXIXA4_5ehw": 160573910,
- "QXMTzXaWJyk": 14439227,
- "QXNg_u5Tv8Q": 10810760,
- "QXYbGZ3T3_k": 11846036,
- "QYOieJuzDr4": 12171050,
- "QYoNHOjr7Rg": 3656621,
- "Q_CljEweGOE": 3667376,
- "Q_IXQZkMEAU": 682064,
- "Q_Lp76ZkDE0": 89582503,
- "QaOtsYouet0": 11071276,
- "Qb7tbWuDc2U": 4468084,
- "Qc4xQ-iiPKk": 36722130,
- "Qc9VsH11nzk": 18024689,
- "QcAr1552o84": 8123356,
- "QcK7n-EqnQU": 14787634,
- "Qcd0IhW_85I": 14463181,
- "Qd2wJCrFsT8": 9177887,
- "QecJrH1FTCc": 26481328,
- "QefQbkN2CNE": 27924203,
- "Qf3RMGXR-h8": 12719842,
- "QfsK8ZyC_bE": 1906076,
- "QgVwzm3u3mc": 53621915,
- "Qh-M3_L4xYk": 8365973,
- "QhiVnFvshZg": 30119148,
- "QhuJn8YBtmg": 6431453,
- "QiZNpzeTVKA": 24150713,
- "QiluvhVryI0": 2214854,
- "QiwfF83NWNA": 5041156,
- "QjJT87nY1WI": 33671681,
- "QkepM8Vv3kw": 17089618,
- "QlM21sl-TDg": 16164064,
- "QlQjCQ5SXco": 31561298,
- "QmEwoBLCqZY": 19366512,
- "Qm_OS-8COwU": 29835868,
- "QmfoIvgIVlE": 5464336,
- "QnWQezGy1Tc": 786127,
- "Qo47YQTfLj8": 44368703,
- "Qod67l16LfQ": 7770516,
- "Qov3zXKrBPA": 112097584,
- "Qp87Z4m8R-w": 11807217,
- "QpcACa39YtA": 9302799,
- "Qqanbd3gLhw": 11332273,
- "QrHsibKBVwI": 2751652,
- "Qs0J-O0HCbA": 249880826,
- "QsdWvHKKSlE": 53880113,
- "QskZ-o0egF8": 30681292,
- "QspmZf_yWyU": 10438795,
- "QsqnJHggDaY": 13551118,
- "Qst1UVtq8pE": 4588064,
- "Qt-CWv6HEII": 16035275,
- "Qu7aVEUc-2w": 9712010,
- "QuZMXVJNLCo": 6445515,
- "Qv2pgv8ea-k": 2228159,
- "QvLS9pP65sA": 21400298,
- "QvdMC_wY_K4": 35142018,
- "Qw37BqzvEvw": 14697638,
- "Qw6NOFJCI8Q": 108299523,
- "Qwet4cIpnCM": 7789810,
- "QwvJ6z49m-c": 33626654,
- "QxNqWZPzsGw": 85607346,
- "QxbJsg-Vdms": 3929570,
- "QymONNa5C6s": 263631163,
- "Qz0n0ZwdCpQ": 7429288,
- "Qz1g6kqvUG8": 14147193,
- "Qz5zFzvbib4": 83280870,
- "QzDO44oZWtE": 11779421,
- "R-2Uw10QgIo": 8272019,
- "R-6CAr_zEEk": 5709766,
- "R-NeYKSEqns": 9800071,
- "R-Qu3QWOEiA": 4968566,
- "R-rhSQzFJL0": 3831066,
- "R0EQg9vgbQw": 7772726,
- "R0JY8oWsuOY": 23750597,
- "R0OM94TaZOo": 6200842,
- "R1y2m2OB1x0": 25380596,
- "R23KUZvjg4A": 27992173,
- "R2EtXOoIU-E": 4350367,
- "R2JsjJyr0ck": 5269782,
- "R2cCoswXvZA": 38344451,
- "R32xBmxXj2E": 1360679,
- "R443Db-wJ5o": 1943570,
- "R486L0M5cWk": 5598349,
- "R48KimqkYTA": 5051981,
- "R4qy9beFpHw": 24546071,
- "R528WbVdC0I": 8396876,
- "R5CRZONOHCU": 21818580,
- "R5UK0dEFSoM": 28583544,
- "R5YiO6rKr-w": 23513929,
- "R7_irilQ_-A": 21983189,
- "R8UIJm57H8E": 45325863,
- "R8YKuGJ0plI": 3506255,
- "R8qygu1RUOI": 8842217,
- "R948Tsyq4vA": 4841374,
- "R9PjfG1e7-w": 14973904,
- "RB7H7paHXd0": 25671131,
- "RBUBIRtn0xQ": 4197186,
- "RBbJKOOZ6FY": 13001708,
- "RD0waXH62AI": 15701435,
- "RD_Mh_SDz3s": 77108429,
- "RDgF0F_9PwM": 743375,
- "REeBUSYRzRo": 43429051,
- "REiDXCN0lGU": 2128541,
- "RFC3RP2jvxE": 19398749,
- "RFesGHsuFZw": 4487698,
- "RFn-IGlayAg": 38778927,
- "RGLGy6r423s": 12126777,
- "RGMEhaeXlUw": 16573491,
- "RGMcswR8DnY": 9585598,
- "RGbA2IyJILY": 5522726,
- "RH26y65N3RU": 74171546,
- "RHQH16HjcPs": 11898911,
- "RHe9X2HDEjA": 4779390,
- "RI874OSJp1U": 6867287,
- "RKBSX-6pKgY": 6269925,
- "RKcJvjP9zgY": 178090790,
- "RL7NmWVmSF0": 13308616,
- "RLyXTj2j_c4": 3967400,
- "RNxwasijbAo": 7199730,
- "ROIfbUQrSY4": 909342,
- "ROpbdO-gRUo": 11513460,
- "ROzkyTgscGg": 22322116,
- "RPhaidW0dmY": 3590514,
- "RQ0855yB2ZM": 109404480,
- "RQPC_rUvHas": 9222538,
- "RQpBj8ebbNY": 18118514,
- "RR18ijofPbU": 54031181,
- "RRGwdfQV8kU": 4520342,
- "RRk5qLd__Ro": 2394296,
- "RSMtgI8yyfg": 12704692,
- "RTAHBQ6fuHA": 20063312,
- "RTE_aitAPGw": 21324007,
- "RTUYnNn2j8s": 26627516,
- "RUVsEovktGU": 7177855,
- "RUYtxofTWKM": 121890013,
- "RX0DY9eRp8g": 10175016,
- "RXKr2fOYfLM": 7817005,
- "RXMSlFtJlEs": 7299691,
- "RXgj09NXNWo": 1290339,
- "RXuipbyW2Wk": 3081673,
- "RY66P59MTCA": 22424585,
- "RZhL7LDPk8w": 13036015,
- "R_-V6usZJsc": 4926115,
- "R_5slDeVCQk": 14820006,
- "R_aqSL-q6_8": 7944506,
- "RaQBaVeEbW8": 46456380,
- "RaeSwi80g3Q": 32470139,
- "RamzvjMF3rc": 20166943,
- "Rb7NsHUw384": 47754600,
- "RbBQN0Wt_wY": 118799459,
- "RbLcxozAfeY": 1461405,
- "Rc1CezZgggM": 13837877,
- "RcLy8Cyxw2k": 35984196,
- "RcPI6Mb9J6k": 49826302,
- "Rcb7ZUTOQ1I": 1629801,
- "RdFfIEDxo18": 6814295,
- "RdYA8ZpqdJE": 3301316,
- "Rdd1ddubDuU": 20354714,
- "RdehfQJ8i_0": 9176664,
- "ReEMqdZEEX0": 9376174,
- "RfzYl7Ll5Ug": 183312744,
- "RgQ4eCc38dM": 33320923,
- "RgklPQ8rbkg": 1776894,
- "Rgr1vRjxzFg": 3715550,
- "RgvmKfvCwps": 4797417,
- "RhUdv0jjfcE": 4103057,
- "RhyJGwNpEcw": 49920710,
- "RhzXX5PbsuQ": 1348072,
- "Ri557hvwhcM": 6608309,
- "RjkTEyO5Zso": 16635085,
- "RjpT4Apgda8": 45428927,
- "RjzzgiUpaQY": 13492054,
- "Rk8dCnKIfP4": 39469283,
- "RkIM0Mbc8YQ": 7312272,
- "RkUdm-GiSVc": 77742081,
- "RlLrvnnTDDU": 8505881,
- "Rm6LkuZfEis": 5254916,
- "Rm6UdfRs3gw": 6078865,
- "Ro5tCQtfrZU": 59420098,
- "RoGgxrCsCEQ": 16004614,
- "RomnHMWSLoE": 13631618,
- "RouNXdkC0do": 15392069,
- "RpOHZc6cDIw": 6153230,
- "RpbxIG5HTf4": 6825920,
- "Rq56-OJR964": 21251790,
- "RqUfUxaY6HU": 28211247,
- "Rr7LhdSKMxY": 18600084,
- "RrJY9dSbRtI": 7962444,
- "RrXJsf9x_sY": 41983773,
- "RsYgjO5BiHU": 42473335,
- "Rsi5mzEaCPw": 9242929,
- "Rtje3kbC9lM": 3475852,
- "RuEJzPQ_N10": 4468262,
- "RuPMsK0mQC8": 7532303,
- "Ruc8u1UyL7s": 3086484,
- "Rw8XE6hvHBo": 62734100,
- "RwFWKaK4rBM": 38635196,
- "Rw_pDVbnfQk": 10400829,
- "RweAgQwLdMs": 1618261,
- "Rx1HtFtc1cM": 24894655,
- "RycF0ub2Al0": 12452046,
- "RywHs4kKxjA": 30642511,
- "RzEFGpe0rv4": 3222167,
- "S-4pFl3mjr8": 38066401,
- "S-9iY1OgbDE": 9619442,
- "S-XKGBesRzk": 9843849,
- "S-agS4YaxxU": 9079351,
- "S-eipYmOy9Q": 4883860,
- "S-mTwg73jCY": 16563526,
- "S0Fd2Tg2v7M": 15684991,
- "S0Kak0qQFgM": 16070154,
- "S0uuK7SQcA8": 7159325,
- "S22Vl4D8iI8": 104851559,
- "S2P4I_hFnFI": 40964253,
- "S34NM0Po0eA": 3637519,
- "S3KMyYYGuPE": 13216078,
- "S3TlDyT2lyg": 112703444,
- "S3X-NkvE49o": 49759427,
- "S3z4XqC_YSc": 13510942,
- "S4T5K4BM3j0": 69307452,
- "S4iQ46ISqRQ": 57307124,
- "S4n-tQZnU6o": 12439218,
- "S4oOSgTj9C8": 8039179,
- "S5LEdJfCsHM": 25617038,
- "S6JoxHSxS6A": 55121378,
- "S6PZYpgoLjQ": 11432192,
- "S6TvRDwgQag": 9396247,
- "S6_7zk_Ht_g": 11216206,
- "S6d5oAS-jUc": 54855810,
- "S7C-Q-RkX0I": 12230569,
- "S7CLLRHe8ik": 4679753,
- "S7HJB0PtiW0": 154045756,
- "S7SnU8ujfwM": 15240962,
- "S8s-g7KZR50": 12196404,
- "S9pTSmXmXH8": 4008851,
- "S9xdJgPWO-w": 6569381,
- "SAZUdVg0ygg": 66260267,
- "SBqnRja4CW4": 6124280,
- "SCBp0d6zR2I": 7692448,
- "SCM4A0rBeOQ": 3512686,
- "SCo1m7OEqac": 28683290,
- "SDpVAZEefHY": 147630106,
- "SE1ltVuE5yM": 5944059,
- "SEtkn9S-WHY": 8439912,
- "SEzDiejb1a0": 244967302,
- "SFL4stapeUs": 5079941,
- "SFRTTUtAjg4": 8254007,
- "SFd8mcpP3TU": 7544689,
- "SFdsY9Rdh6w": 5870187,
- "SGKHQqHXmpQ": 5791195,
- "SH3O8G5B8dE": 6568163,
- "SHZojeuDLjM": 109835245,
- "SHjxi0bRiLA": 10926268,
- "SIB4WDYF5DQ": 4050598,
- "SIDRXhdQ0qQ": 17706762,
- "SIU_9SMd5q0": 38007043,
- "SIoKwUcmivk": 17439144,
- "SJ1gu_WRx5o": 26523810,
- "SJ3TKg_3PD8": 8122920,
- "SJOMrRHGcNY": 22477643,
- "SJUd5du0T08": 3370019,
- "SJVhtIGAkKs": 33430684,
- "SL3I_RYjyZo": 24621151,
- "SL7J8hPKEWY": 10423457,
- "SLf_oAkngP4": 29242628,
- "SMqERP-J2tQ": 75585972,
- "SOQyiM6V3RQ": 32503338,
- "SOuSd7r1ZnM": 11363551,
- "SP-YJe7Vldo": 2951286,
- "SPGRkexI_cs": 32018490,
- "SPVqgkOZMAc": 5963568,
- "SPZsJN_Wsdc": 2624990,
- "SPgYrsONgwU": 160350680,
- "SQmyTmO8OKw": 2965361,
- "SQpbTTGe_gk": 54911013,
- "SQzjzStU1RQ": 3334413,
- "SRPQ62dR6b4": 7725345,
- "SRg_XB83-tw": 41035963,
- "SRn3WhhS6vs": 25230924,
- "SSFyGYMiGro": 61053051,
- "SSNA9gaAOVc": 3178703,
- "SSf1HenQhWs": 82958274,
- "ST-KdV7aVrE": 11079849,
- "ST1UWnenOo0": 10532584,
- "ST6mSB-RvE0": 30448107,
- "STB4pbEJxc8": 49431183,
- "STcsaKuW-24": 9536480,
- "STs6h1qUSGs": 192106124,
- "STyoP3rCmb0": 2425110,
- "SUoqA9srY1Q": 7281882,
- "SUrlTlI-oxI": 2005756,
- "SVN1IsRQ88M": 14267930,
- "SWbis2zWIvo": 21033831,
- "SXYeQDrH36Y": 14438053,
- "SX_DzTb95mM": 13850446,
- "SXbc4J1qWjE": 6678425,
- "SYcsZ6J3xZ4": 17874125,
- "SYkmadc2wOI": 5543273,
- "SZ6WuRkummY": 7692304,
- "SZF5K8epWko": 28751675,
- "SZUDoEdjTzg": 7855310,
- "S_OX3ByvBSc": 1101410,
- "S_YIUXy-WFM": 2938333,
- "Sa3FyvaKYVw": 124399826,
- "SadSIPGOeIE": 55808791,
- "SauhB2fYQkM": 24223108,
- "SbbBzV6pcFg": 120025429,
- "Sbgha6LQLlY": 730127,
- "SbpoyXTpC84": 8298324,
- "Sc6zc8KR_NU": 1420445,
- "ScvuRb6vsz4": 10246381,
- "SdHwokUU8xI": 4170809,
- "SdbOrNLcC0I": 109332475,
- "Se-ekDNhCDk": 7057610,
- "SeQeYVJZ2gE": 40455185,
- "SeZk0raNR5U": 30294821,
- "SfWrVNyP9E8": 3134707,
- "SfbjqVyQljk": 835189,
- "SffnpNxGWb8": 21713265,
- "SfgD7Sm08ns": 18333348,
- "SfxULALs_u8": 1180353,
- "SgKBBUFaGb4": 4327329,
- "SgKCGwSdCMo": 101336558,
- "Sh9uYq05zPk": 16232339,
- "ShJqEBcyiBg": 10417646,
- "ShpI3gPgLBA": 7494158,
- "ShzPtU7IOXs": 5703184,
- "ShzW1LoQgoc": 14596416,
- "SjQG3rKSZUQ": 9310029,
- "SjY5UytlTTs": 9378292,
- "SkMNREAMNvc": 2018240,
- "SkdYqyCIh5g": 19966096,
- "Sl5UvcedhKc": 24920918,
- "SlQDuTS6FR4": 274998265,
- "Smd-q44ysoM": 240955365,
- "Sn5CwAODVdI": 9830554,
- "SnbXQTTHGs4": 8392677,
- "SqE5S1qS7ZU": 27405631,
- "SqcxYnNlI3Y": 13542591,
- "SrL6TQbWKJE": 22151192,
- "SrrcBWllLbI": 19343302,
- "SrvPOkMs4U4": 43734033,
- "Su4DKLbK8mA": 4262934,
- "SuB1gkto9LU": 6894853,
- "SvFtmPhbNRw": 32663749,
- "Svvr5uF_FZ8": 23102641,
- "SwB9Fq5VRZY": 3137587,
- "SwqOrUWzDY8": 4206701,
- "Sx_KqnkcJVA": 8142734,
- "SyFpQbnkg_c": 1858217,
- "SyWWgn5YEZo": 5905973,
- "SysHZ6-yai0": 12678032,
- "T-Yv4mp5yp8": 86540005,
- "T-dSx5f15U4": 17217781,
- "T-iDkq8yfWY": 37774004,
- "T-kgoxhFSmU": 22148175,
- "T-pMxaKnFx8": 33768065,
- "T0CwhLHrE2k": 2672605,
- "T0IOrRETWhI": 2472508,
- "T0fq3XFfxrY": 58963999,
- "T0zpF_j7Mvo": 21843452,
- "T2DaaGuKOTo": 158232153,
- "T2ZnxsBWU3E": 123135940,
- "T2mFyPxL-fU": 9053503,
- "T4JKO0OGjpQ": 662863,
- "T4iRq8_ZmAA": 284682617,
- "T5DGZIsfK-0": 9813764,
- "T6G0ewxKkCQ": 29219645,
- "T7JIpsnV71Q": 36528057,
- "T7j0V1AHvBU": 110756829,
- "T971zHhZ3S4": 1731767,
- "T9Nw66RCMhg": 15259793,
- "T9byZBGtGuw": 11317971,
- "TA5SLDiIUWs": 19324499,
- "TAhRoJB34nw": 4947394,
- "TC23wD34C7k": 11652101,
- "TCBALVumrUQ": 37008027,
- "TD1zuENbEdk": 2764530,
- "TDHI-aieyfk": 2182630,
- "TDQAd2N2Cls": 15481177,
- "TDoGrbpJJ14": 23690743,
- "TDpQ5xL1EEE": 76809675,
- "TEXSW-o8674": 2161320,
- "TEfyIsDRGCk": 3785233,
- "TEjZlQUuxvc": 26380298,
- "TErJ-Yr67BI": 8077933,
- "TEysuDHExc4": 30406239,
- "TGgOCc5hoHA": 4908568,
- "TGwXMpWvcYU": 6729349,
- "THJgaznSBu8": 6816791,
- "TI27-ZN2Glg": 49908473,
- "TINfzxSnnIE": 96923616,
- "TIwGXn4NalM": 2893851,
- "TJUm860AjNw": 13497874,
- "TJaHNxJk5-4": 8728194,
- "TJeUOPc9pgs": 34080631,
- "TJgBEI3drUc": 16352335,
- "TK7NnXGrWfA": 10942302,
- "TKGcfbyFXsw": 26088856,
- "TKI1DaquKnI": 89343083,
- "TLSYwkWCIzA": 5685803,
- "TLU9Hdt14Kc": 59022503,
- "TMmxKZaCqe0": 7429725,
- "TNACKWquyys": 638234,
- "TNGSzt2v4xY": 24661542,
- "TOdHMORp4is": 10482701,
- "TOobWKx1xe0": 3079635,
- "TOqor4PWGhM": 187657624,
- "TPM1LuW3Y5w": 15162285,
- "TPa8nt2RrHU": 9443303,
- "TPov_v9mLWc": 6584291,
- "TQ51Gsb98ec": 21393109,
- "TQ8F_yPwqzA": 88988031,
- "TQJQeTpH_lw": 6311431,
- "TQwe0Y4Ynjs": 15928603,
- "TSTLLFJbaA4": 5609569,
- "TStjgUmL1RQ": 23407212,
- "TTYDbGXgcCk": 24212533,
- "TUOQZjotyAQ": 9994979,
- "TUuABq95BBM": 4054432,
- "TV5kDqiJ1Os": 4555711,
- "TWv6f7rwjF4": 4717992,
- "TX7-Kdn6lJQ": 193574086,
- "TXGhMDbbnzQ": 20724535,
- "TXrOpjG4dUs": 9135342,
- "TYFAJHx5LFA": 31452121,
- "TYXCcTchLnI": 106469495,
- "TZ1CRFgBK4o": 78929140,
- "TZ5aMFpwTp8": 10478003,
- "TZ7d5kjAlQw": 4983940,
- "TZrKrNVhbjI": 2175628,
- "T_NdGA0CcXI": 15494449,
- "T_b9U5gn_Zk": 52647497,
- "T_c343e0msA": 22737733,
- "T_mFhtBja5A": 3516912,
- "T_yFszI7Aso": 33940437,
- "Tal_fgREll0": 3913558,
- "TbaltFbJ3wE": 1209004,
- "Tbq-KZaXiL4": 27690378,
- "TcIDXqmt74A": 14540040,
- "Tczu_dvVuuk": 13586325,
- "TdLD2Zh-nUQ": 8340365,
- "TdW3LdN5SJw": 2451917,
- "TgDk06Qayxw": 6178189,
- "TgKBc3Igx1I": 6261493,
- "TgLTzYXg530": 31660125,
- "Thvc2s9aUP4": 6744879,
- "TiXusw8aPMk": 257974821,
- "TjYbFdSY0LA": 20068105,
- "Tk2bxgNI8LY": 8619748,
- "TkH-yjJ35vU": 18558185,
- "TkZ5IywDBnQ": 14550770,
- "TktF6unUlso": 3799670,
- "TljVBB7gxbE": 16136077,
- "TlvXGblFsv8": 24711948,
- "TlxSlwQiYgM": 6131710,
- "Tm98lnrlbMA": 1625072,
- "TmFET3F64pE": 10748745,
- "Tmt4zrDK3dA": 25695172,
- "Tn9U8hLu9aI": 2288836,
- "Toss6Hzf5n0": 53160054,
- "Touv2APcBRw": 3828496,
- "TpIBLnRAslI": 5988692,
- "TpLlJ8-AnQM": 2463757,
- "TpQln9_i5t4": 6135158,
- "TqAtt3g6Tkc": 6654214,
- "TqGCNNlx6pU": 1768588,
- "TqRReFvbpXA": 1321778,
- "Tqpcku0hrPU": 3089439,
- "TsXlTWgyItw": 8019348,
- "TuId1spuyoc": 1696797,
- "TugWqiUjOU4": 4950481,
- "TvP1ydWhDjk": 1148750,
- "TvPsESzCYis": 95259219,
- "TvSKeTFsaj4": 5066766,
- "TvUCe6Bomy4": 2725690,
- "Tx7Cwn5pgQo": 4018840,
- "TxkA5UX4kis": 29523283,
- "TxwE4_dXo8s": 10744585,
- "Ty6TfxCYPQI": 13646852,
- "TyZODv-UqvU": 267040153,
- "Tz-9z064euU": 33117274,
- "TzSMvEiEuo0": 36337852,
- "U-k5N1WPk4g": 12762129,
- "U1Ls9Vh-3m8": 22358168,
- "U1lQbh21y1k": 1519771,
- "U2Nw5T44zvY": 6706721,
- "U2W7HPyC0cM": 8003282,
- "U2cKywEn6KY": 12074717,
- "U2fGKvbir24": 16816541,
- "U2iZ83oIZH0": 157237721,
- "U2ovEuEUxXQ": 4537181,
- "U3JxFFdKCKM": 6492231,
- "U44my48zgFE": 3738761,
- "U5-3wnY04gU": 20096170,
- "U5vAO_f2LDQ": 8400516,
- "U5xnGyw2llY": 29045035,
- "U6RFAUmYU5o": 48675817,
- "U6Re4xT0o4w": 9765629,
- "U6U4HhR3Fqc": 2976919,
- "U7HQ_G_N6vo": 11559818,
- "U7fKAYqfpC8": 5454368,
- "U8GzssRfVMc": 2551102,
- "U8d45ETt78o": 82522089,
- "U9OfQd8poTQ": 4574806,
- "U9dGHwsewNk": 9993069,
- "UA975j_qsTQ": 2584625,
- "UAXapQvZe2w": 9996948,
- "UBIyl4_oNYU": 17592009,
- "UBlem4dGLGU": 13230411,
- "UCCNoXqCGZQ": 79547987,
- "UDe6zeabyQM": 3371206,
- "UEPs-GA2s40": 25072484,
- "UFNsjLUN1g8": 136822341,
- "UFRAHIvCtzg": 5548328,
- "UFWAu8Ptth0": 7524831,
- "UGad0bvDw9Q": 35510099,
- "UH7eOrP64q4": 8446181,
- "UHEiWws8t-g": 11516489,
- "UHZHkZ6_H5o": 8234912,
- "UJQkqV2zGv0": 13317060,
- "UJxgcVaNTqY": 16204302,
- "UK-_qEDtvYo": 3512664,
- "UK2shgCXALo": 3054982,
- "UKM8BnpZr94": 3578662,
- "UKQ65tiIQ6o": 2184470,
- "UKYjhM_c_7s": 3575162,
- "UKnBu-Vosjw": 97625060,
- "ULgGEXBmNlw": 65359284,
- "UNWxKDvBFik": 18869189,
- "UNZ171fDja4": 7746403,
- "UNgx_YSygyU": 3328421,
- "UODaRxt8Zuw": 17277207,
- "UP9xy2eVj7s": 7629553,
- "UPgpYH9ZtMA": 18589773,
- "UPoXG1Z3sI8": 8082123,
- "UQK7EAgRBpE": 56555243,
- "UQiNvDOJi0c": 26322044,
- "UR4Zr0hE-As": 8570650,
- "URN-XyZD2vQ": 8246453,
- "URcpchlTNBY": 53330062,
- "UTs4uZhu5t8": 6101182,
- "UU366tJPovg": 229650546,
- "UV6mzD2Yc98": 1100970,
- "UV8kgqk_DAY": 16351284,
- "UWMNAdXEDlM": 29204234,
- "UWrJssS76XE": 60842378,
- "UXIfzc1UH-g": 8645254,
- "UXORCpvKYiI": 15978590,
- "UXOcWAfBdZg": 24249383,
- "UXQGzgPf1LE": 4002972,
- "UY5S4xntyRk": 1044456,
- "UYShebe44Xs": 5469529,
- "UZ1YE68HszU": 25837138,
- "UZEETyzql0Q": 69423393,
- "UZeBzTI5Omk": 15669695,
- "U_UgGZuUnkU": 39878752,
- "UbUdyE1_b9g": 2073956,
- "Ubp-Dz5uGUk": 4709012,
- "Uc2Tm4Lr7uI": 6559171,
- "UdHgWK13x5I": 10405296,
- "Udltkvm9HLc": 10854133,
- "UeG_EYd-0xw": 3004720,
- "UekR9J31a2o": 10536674,
- "Ueqs7pl5OAY": 43725398,
- "UfRy4Rq8xes": 51687230,
- "UgE2GIQwUCw": 34673668,
- "UgWxvqIZLU4": 19694489,
- "UgXZFel0H8Q": 6511124,
- "UgZIULiNRoo": 15027362,
- "UgnF1w-H8vw": 10805185,
- "UhIwMAhZpCo": 11225108,
- "UhMM68fq9FA": 2611207,
- "UjIPMJd6Xks": 8397715,
- "UjX4ExCixWY": 19001536,
- "UjfmOmPARyk": 17210221,
- "UkXI-zPcDIM": 7053309,
- "UlHo2cxKA84": 7693037,
- "UlJmX9SLGRw": 6198879,
- "Um92GZLCQ_Q": 35406969,
- "UmiZK6Hgm6c": 14230720,
- "UnH3nsk-Ibs": 49468358,
- "UpGsouOnxOU": 86008909,
- "Uq5Wzs96tiw": 9301901,
- "UquFdMg6Z_U": 3765551,
- "UqyN7-tRS00": 10868878,
- "UtIFoMuyh_4": 16879351,
- "Uteoh0PtWwI": 4507585,
- "Utm875JRi-o": 2706999,
- "Uu-5ofhxOX8": 341588603,
- "UvAOynxGfIU": 2281520,
- "UvDcEvDC4vg": 6055266,
- "UvtWf4TVawE": 3013589,
- "UwWn84u6i8s": 6453211,
- "UwiclYspLqw": 137443966,
- "Uwpdiq9mYME": 90037097,
- "Ux2E6uhEVk0": 4670199,
- "UyCwAFQt4v0": 4867640,
- "UyQoTnWBsKw": 21974722,
- "Uy_L8tnihDM": 5430299,
- "Uz0MtFlLD-k": 5904161,
- "V-5q6tKaRuM": 834152,
- "V-_H-6bXw8E": 10728548,
- "V-rko8jgJ9o": 17178722,
- "V0d5gOty1Go": 10980442,
- "V0xounKGEXs": 1212396,
- "V1LloSp4PV4": 1183841,
- "V2vR5_B6C5I": 21556125,
- "V3FvaClh6LY": 1028835,
- "V4z9Y2u30Qs": 31736774,
- "V6Xynlqc_tc": 5297544,
- "V6bs91KND8E": 4982037,
- "V758Lz_MuEg": 4211343,
- "V7H1oUHXPkg": 8703498,
- "V7P2dnrWDeQ": 48001233,
- "V7vCaxe3Rys": 9541758,
- "V8C15AfL6Gk": 2295738,
- "VAxHMTJRhmY": 6675188,
- "VB_1AsmtFds": 866505,
- "VBcEz8bVbL0": 6324113,
- "VBf3plXRonw": 5970278,
- "VBuWGjV-Sis": 136556414,
- "VEv7Mmx1V4w": 37708017,
- "VExW4SNt3Ko": 72015988,
- "VFBXT9D00kM": 893176536,
- "VFPBf1AZOQg": 42295449,
- "VFtOcdXeP0Y": 264852614,
- "VGxGrEnWVsg": 3524002,
- "VIHldsSmASU": 5071494,
- "VIV-yJfIrlI": 405666612,
- "VIVIegSt81k": 46595026,
- "VIdvlSFDl2c": 19073619,
- "VIfQh71XwMM": 16935207,
- "VIrkurR446s": 17334657,
- "VJgVdzicv_I": 5873450,
- "VLNxk83TIOU": 36642330,
- "VMEV__2wW3E": 5246770,
- "VMRuR1imeE0": 13105608,
- "VMtXfhvQRTo": 246493400,
- "VMwa6yC3r-s": 16652059,
- "VNB-OVWlRbk": 388238104,
- "VNfASWRrTYY": 4283559,
- "VNwh90eJels": 31985330,
- "VO40SpSBjbc": 79093182,
- "VOzV4d0HKis": 7539756,
- "VP3nKDUw1jA": 34183413,
- "VPYDW1_FsyM": 5775201,
- "VPz4bCQDGgk": 8988475,
- "VQniy8iq9EQ": 88518751,
- "VRNDGeq_hlE": 6529280,
- "VRwWJyy24So": 118789640,
- "VST_U297pH0": 3072891,
- "VSUEiTb0tag": 276483244,
- "VTDmIkxWOjc": 56355168,
- "VTcPBF9dtKc": 9910450,
- "VTdV9JaHiIA": 11998572,
- "VTfEJo2zhc4": 294625992,
- "VTtlgX27FgI": 60169203,
- "VVlmNg8Udq8": 3592251,
- "VW6UrPKPInA": 1559090,
- "VWAfEbgf1Po": 4492733,
- "VWlFMfPVmkU": 6437111,
- "VX643tF89ZE": 25371032,
- "VX7K8iqoiRc": 7646415,
- "VXLSTd_dlKg": 12138957,
- "VXrn5HOQmHQ": 12526237,
- "VYQQD0KNOis": 30499880,
- "VYSFNwTUkG0": 82300440,
- "VYbqG2NuOo8": 5411578,
- "VYgSXBjEA8I": 33194614,
- "VZB1P4uNFAw": 21089291,
- "VZOHWaw5dqM": 5553461,
- "VZer0w7foLg": 23619619,
- "V_4pj4_C2Vc": 12526146,
- "VbNXh0GaLYo": 23412767,
- "Vb_XE2mtE1Y": 12394569,
- "Vc09LURoMQ8": 15714136,
- "Vc8mmZTrNtI": 18490420,
- "VcnU7cu6j5Y": 21006179,
- "VdBZSEF_FhU": 7700464,
- "VdQ6lAhKGTc": 52215036,
- "VdaTuNbyDHg": 16198009,
- "Ve99biD1KtA": 13718995,
- "VejCw2NlE60": 3837303,
- "Vh70PyitQzo": 2085511,
- "VhH2nEDCd68": 3225968,
- "VhNkWdLGpmA": 6866661,
- "Vi1JK6IYVt8": 29805328,
- "ViAmQivKif0": 16340556,
- "ViFLPsLTO1k": 2981398,
- "ViLt2WI0XSg": 7763131,
- "VidnbCEOGdg": 1349996,
- "ViqrHGae7FA": 8251963,
- "VjLEoo3hIoM": 5407552,
- "VjmFKle7xIw": 5017818,
- "Vjs8uK2ovQE": 13529091,
- "VkrOYs2LFNk": 5895825,
- "VlaGxYjnoPY": 3666108,
- "Vm1_vSny4BY": 54747301,
- "VmV6RlsUwO8": 13153553,
- "Vn-tOBUvnD8": 14904292,
- "VnTlKcIigyY": 9091684,
- "VnfpSf6YxuU": 70035136,
- "Vo6W4kDv0cA": 17111087,
- "Voj0uzomNPQ": 5012614,
- "VouATo5Cg04": 10364138,
- "VpLKdKkpg68": 19544365,
- "VpVu25KhozQ": 6250041,
- "VpVwgQjjaO4": 43457843,
- "Vpo0DArodJI": 43512269,
- "VpuN8vCQ--M": 4188654,
- "Vq7EOmvU1eQ": 290739026,
- "VqAa_cmZ7OY": 15775121,
- "Vqce2dtg45U": 17851293,
- "VrB3LaSD_uo": 14828959,
- "VrFbXxkl9JU": 15817421,
- "VrflZifKIuw": 6714678,
- "VsW6NXZIUCQ": 22666883,
- "VtBRkjRua0I": 10088834,
- "VtSjcxdmboM": 123612719,
- "VtqrKxJmBn4": 23907025,
- "VuJEidLhY1E": 9325452,
- "VvuuRpJbbHE": 3199059,
- "Vx1dnPMPhl0": 7051865,
- "Vx5uoZAkxng": 1379470,
- "VxEIsPOdOLw": 20599463,
- "VymVIXcyErI": 13492171,
- "W-5liMGKgHA": 4103652,
- "W-Nio466Ek4": 5003464,
- "W-OskAegz5o": 42396610,
- "W-R8nn5GQ8U": 28287615,
- "W-huWpNU-9w": 12473320,
- "W-itq-SYw0I": 7440082,
- "W0BG49ir32E": 48285804,
- "W0VWO4asgmk": 5857297,
- "W1caxQHNYuc": 127775464,
- "W20SoZiJOHU": 17236599,
- "W2NnNKtquaE": 2689673,
- "W3C07uH-b9o": 40092526,
- "W3_A_A0XBiY": 2362470,
- "W3a2QIm3cXM": 7107154,
- "W3flX500w5g": 34624258,
- "W5QExA4er6w": 7216345,
- "W6gKc7Yjig8": 9315618,
- "W74G5sNJMuA": 322689615,
- "W7DmsJKLoxc": 9138276,
- "W7H-VcaSSu8": 23349158,
- "W7dImsrVa0Y": 1960457,
- "W84lObmOp8M": 8635241,
- "W9AVRhqEkek": 95906616,
- "W9B3VYdC5T8": 3842212,
- "W9trSYt8mQI": 19724691,
- "WAPZihVUmzE": 5955165,
- "WAoaBTWKLoI": 8526485,
- "WBNJWACE8sQ": 85894250,
- "WBWV_uvgC6w": 8533233,
- "WBsyjezwfYc": 38073127,
- "WDcqGygKH44": 7337032,
- "WDdF9ArqklA": 16718598,
- "WEYKoJTIHcE": 14885835,
- "WEoml1Fs26I": 18919284,
- "WF7L2waDwLw": 3319340,
- "WFk7nT51q4U": 22829623,
- "WFnyLmL9t2I": 6775302,
- "WFuLVSz6n8M": 3096358,
- "WGMn16TDTjE": 24662527,
- "WGjKtuS8i8s": 34281862,
- "WHOwbEu7sWI": 42320992,
- "WII2kc2QYdU": 12975780,
- "WIhR50ttMB4": 271292060,
- "WJUcZPqgEXU": 40068954,
- "WJwjvb3Q9Ag": 17983410,
- "WLGTx6sSIOc": 4032371,
- "WLIwMlIdIxQ": 5221394,
- "WLKEVfLFau4": 35068245,
- "WMgJtmjWHYg": 349443754,
- "WMv8A9qg6jY": 8513365,
- "WNZf4ip_R9s": 8950404,
- "WNhxkpmVQYw": 10655590,
- "WNuIhXo39_k": 8866074,
- "WO1I1dN0DaA": 64367803,
- "WOU_jV8d5VU": 38600434,
- "WOnOq9YIrWI": 17149151,
- "WPimvspI0_c": 4660787,
- "WQBBbAhjxq0": 38327979,
- "WR2R_wrdEVY": 2707651,
- "WR9qCSXJlyY": 3719581,
- "WRuatAcd2WY": 7465413,
- "WSLad3lN6Jc": 103801947,
- "WScwPIPqZa0": 7972896,
- "WSpF5uvApLA": 4144950,
- "WThFuJ6wFcM": 252367790,
- "WU3AlAOCxN0": 131214534,
- "WU7TfO-iaK8": 24871520,
- "WU9g4CvZyR0": 2631880,
- "WV3MXLAfIi4": 81787313,
- "WVyusmjiTXI": 78693696,
- "WWHJqnfmhQ8": 23938518,
- "WWe7pZjc4s8": 6898248,
- "WWv0RUxDfbs": 18119835,
- "WX4T9NjYG94": 44511177,
- "WY6QG0mZ7uQ": 2182149,
- "WYI4u3beRdM": 290967319,
- "WYlWN_keVkY": 115130023,
- "WZgYhVgWR8g": 114098674,
- "W_Q17tqw_7A": 12102845,
- "W_VhVHRal6o": 2189378,
- "W_YeBq1vgAs": 38397655,
- "WbDL7xN-Pn0": 32180285,
- "WbyODj_OiZU": 3508721,
- "Wce-7Mw0mtc": 29449625,
- "WceVwMdN0eE": 254480487,
- "WcpvoJAT_as": 8850963,
- "Wd7wQG9D-CE": 1023812,
- "WdAFrBpP1Bw": 67459812,
- "WdDzs70Txjs": 47477748,
- "WdPMdGUeYGk": 28473705,
- "WdSxjy-KkZY": 1686314,
- "WeVWv_OEJsY": 7073764,
- "WegXPG-h8Ng": 5325629,
- "WenwtcuqOj8": 6948953,
- "WevZMyikGV4": 3070515,
- "Weymq89kwAw": 42120687,
- "Wf5PlOdTbyw": 1812764,
- "WfMfs6naKkE": 361871433,
- "WffVdYETdng": 5922733,
- "WflIdizLNYQ": 66650192,
- "Wfpb-fniSSk": 6286484,
- "WhGOmAwuQTE": 14318831,
- "WhPW50r07L8": 26359754,
- "WihqEIIFQMk": 50961986,
- "Wiuat7KdMmA": 20438327,
- "WjfWCyEt07M": 1052997,
- "WkiPVButdeg": 12705081,
- "Wkjz1LlX1CQ": 2835232,
- "WkmPDOq2WfA": 320168883,
- "WkspBxrzuZo": 6265709,
- "Wl4re38deh0": 21263477,
- "WlLFmm6xm6A": 244611122,
- "Wm-akMcsHEc": 154090583,
- "Wm0zq-NqEFs": 1677515,
- "WmTjwOtPibc": 5887773,
- "Wnz0vrmsRfk": 2136978,
- "WomsUEVVtCk": 10917568,
- "Wp2nVIzBsE8": 9334932,
- "Wph0cBNi7Yo": 45545026,
- "WqNc6My1aNU": 2360608,
- "WqsJNtBEKtg": 21557727,
- "WqzK3UAXaHs": 34156707,
- "Wrdmw_Ioovk": 47412832,
- "WreIjcz4X_k": 57263467,
- "WrsROtPSeuA": 3986062,
- "Ws63I3F7Moc": 93530962,
- "WtCCobhLqng": 382092693,
- "Wtxec3V4WKQ": 47081309,
- "Wu1KO07WPkk": 3889343,
- "WuSuIgiOPqM": 14125768,
- "Wv-yAXU_azM": 5372065,
- "WvxKwRcHGHg": 4797513,
- "WxgNAsiOXY4": 56035467,
- "WyAtOqfCiBw": 60275341,
- "WyNqLrb0LRE": 78776666,
- "Wyxz0fgp6-A": 25360932,
- "X-F3wDDdc0I": 73296369,
- "X-VCk3WrGlM": 11596258,
- "X-iqwAt2Qmk": 71842099,
- "X-m0JDCw6TE": 14353857,
- "X1E7I7_r3Cw": 112579392,
- "X1bmedVziGw": 172224012,
- "X1h5kr55SZg": 16483058,
- "X2Z63GnMNDw": 2335801,
- "X2jVap1YgwI": 8139237,
- "X36GTLhw3Gw": 6488721,
- "X3JqIZR1XcY": 3278695,
- "X3QUqRd18jc": 8298894,
- "X3bqQI7-sCg": 80757428,
- "X4IL333rppM": 15234372,
- "X4W44wJbJgk": 3435945,
- "X58FV7MwdbY": 6850098,
- "X6zD3SoN3iY": 2390169,
- "X7B_tH4O-_s": 12277292,
- "X7GT9JKoAbo": 15959577,
- "X872rmThCF8": 21451634,
- "X9rTIwc1wRU": 15559557,
- "X9ypryY7hrQ": 4769186,
- "XAW9d3XU3qI": 4313968,
- "XAzFGx3Ruig": 3970923,
- "XBI7DqttyOQ": 19089174,
- "XBPgPEo0Xx4": 15698259,
- "XCdvo5fv-W0": 15478992,
- "XChok8XlF90": 3830513,
- "XD-FDGdWnR8": 4646996,
- "XDF2QyQtd_Q": 47141629,
- "XDIBJyNnLOU": 6543925,
- "XDOH9Ul2OOM": 1775552,
- "XDjbNykJ28E": 5297084,
- "XEPdMvZqCHQ": 9520273,
- "XF5r_aWrHNg": 5333302,
- "XF9CaqdhmJo": 12915884,
- "XFI7GK4Nv-s": 2881208,
- "XFhntPxow0U": 6534617,
- "XFmovUAWQUQ": 93949435,
- "XFuFxgbnkaM": 9092938,
- "XGWL9jfPHJ8": 18420015,
- "XGZvvQ8BmjY": 69355790,
- "XGpEHj43kcc": 6782530,
- "XHHYA2Ug9lk": 7776504,
- "XHLMUdL8feg": 105395208,
- "XHLgY7Z3cb8": 2986006,
- "XHd7Ng45Vxk": 1991399,
- "XIkryXkz8a4": 94980688,
- "XIsPC-f2e2c": 3782192,
- "XJBwJjP2_hM": 8132876,
- "XJGiPzcalwU": 92903912,
- "XJdE7awhJg0": 11730329,
- "XKk9K5xTgDA": 11075501,
- "XLMs9jqMYOY": 52075684,
- "XLcbGHNFcpM": 54884786,
- "XLcyqs5vQHQ": 14912983,
- "XLoLvz0r550": 68841019,
- "XLuXNYV8s68": 4874958,
- "XMElagkUBmY": 53700242,
- "XMJ72mtMn4Y": 5861817,
- "XMkUDyl1ZRo": 4883684,
- "XMwnJUprid8": 1866474,
- "XN48Ba9Ncr8": 2418221,
- "XOAn5z8mkvI": 2901887,
- "XOIhNVeLfWs": 5601000,
- "XOxsjdB4-ZQ": 158233116,
- "XPf8LMu7QSw": 9757937,
- "XQRZqG7wCPQ": 52541471,
- "XQTIKNXDAao": 356267598,
- "XR52dXLyz-M": 17672075,
- "XS8OhYdc-20": 15748304,
- "XTF0-54yJMk": 56472711,
- "XTMbRDRaviM": 23221905,
- "XUT7zEffaTY": 5796024,
- "XUmB0reCB-U": 10580224,
- "XUvKjC21fYU": 4394944,
- "XVC9HOSwHl4": 46231675,
- "XVOU9c3crbc": 12669117,
- "XVWOlKdpF_I": 11661114,
- "XWq8bplP-_E": 2583665,
- "XXl5h257iBA": 35266008,
- "XXrmBhpRG2U": 87404020,
- "XYWFGJ2aYRU": 4434186,
- "XZDGrbyz0v0": 5975467,
- "XZRQhkii0h0": 1574360,
- "XZWoMXVANww": 23423839,
- "X_3QAB3o4Vw": 5318936,
- "X_FEP9vDp7Q": 24960974,
- "X_PnRFAKbkg": 2046460,
- "X_YXTWU2maY": 48794365,
- "XaJQse2u5TQ": 2858299,
- "XaqsqtWiJMw": 22977041,
- "Xb05CaG7TsQ": 16911677,
- "Xc3oHzKXVh8": 12545962,
- "XcRX-mkjeiM": 843148,
- "Xcel427Ezl0": 28139341,
- "Xcrco59p40o": 17732316,
- "XdXXK_PTkUU": 126358399,
- "XdYgyO0RmFI": 153852996,
- "XdsifNBa9kk": 7673935,
- "XdzcU5JbVcA": 6616067,
- "Xe6YlrCgkIo": 11153358,
- "XexVwvfOkrQ": 15019633,
- "XfR3JSkSkJM": 5979457,
- "XfeO76UvXFk": 73743499,
- "XfpusWEd2jE": 354477537,
- "Xg8_iSkJpAE": 24072913,
- "XhCSHu6dHb8": 28150825,
- "XhSsMjuzt9Y": 4829303,
- "XhYQYVQq6K0": 12089874,
- "XiAoUDfrar0": 15544820,
- "XjCEumlJBno": 13286336,
- "XjFNmfLv9_Q": 16145852,
- "XjoJ9UF2hqg": 9010444,
- "XkD1RPDYWK8": 258513342,
- "XkRD9lv_y44": 27274503,
- "XkcHktjqI1s": 74598551,
- "Xl724v0CU7E": 16298495,
- "XlipVSubHms": 4926364,
- "XmDfHU0hS18": 20922683,
- "XmL7RHouyUo": 4039650,
- "XmirNCA_Lj4": 90719897,
- "XmkbAduMD_E": 46611812,
- "XmswXY1IoMk": 446458,
- "Xn29pt5159k": 25042150,
- "XoBlfbrdBpQ": 4452116,
- "XoEn1LfVoTo": 6357955,
- "XozFlJxxxh0": 17753289,
- "Xp6V_lO1ZKA": 5467483,
- "Xqfcy1rqMbI": 7130835,
- "Xrh3cInCFFc": 642139,
- "Xs3DzydSKu8": 21189799,
- "Xs6E-FEls1c": 54265529,
- "XsD7mqFDJs0": 8235151,
- "XskxuDSG7mA": 26369491,
- "XspzfNSSqyk": 14511215,
- "XstL_x4ucm4": 26180579,
- "Xt4sT0fV9Pw": 5647288,
- "XtAB9GOfLiM": 3716549,
- "XtJwkIacpi8": 12358740,
- "Xtcylk5r0g8": 4469903,
- "Xu1lBwJw1OU": 2860066,
- "XuDGJ-LUnAU": 7513581,
- "XuwldEyWjH0": 3045794,
- "Xw1CMTXQGPY": 2679403,
- "XwIs1nlDQ2I": 171426107,
- "Xwf3ZsGYzCU": 10611209,
- "XwtyQsCLnEE": 8838197,
- "XyDMsotfJhE": 4131585,
- "XyiQ2dwJHXE": 6235473,
- "XympPG5iD-Y": 40204396,
- "XysdjxWP1WI": 164321024,
- "XzYNh2wpO0A": 877136,
- "Y-w7SnQWwVA": 9946689,
- "Y-xg1zfpkQs": 43336864,
- "Y0eWnOZpSpQ": 31531276,
- "Y0ibXbKwN4w": 38099961,
- "Y1PXVSDn9HU": 96677426,
- "Y1V5mZaMfTk": 1531081,
- "Y2-tz27nKoQ": 3133671,
- "Y2B6j7poiKI": 7884281,
- "Y2ed-g8Lpdc": 12127283,
- "Y3ATc9he254": 13678563,
- "Y4HzGldIAss": 14724350,
- "Y5cSGxdDHz4": 2887047,
- "Y6ENEA7FzvU": 14315619,
- "Y6JsEja15Vk": 2980810,
- "Y6wNiYcuCoE": 6077199,
- "Y70TTv5ZLkk": 3520175,
- "Y7sqB1e4RBI": 3936806,
- "Y8ortjAPw0Q": 7555887,
- "Y8yga-UzFBY": 15814290,
- "Y9FyokN7WlM": 143732194,
- "YBYu5aZPLeg": 3517790,
- "YC3Z5nqCs_8": 19475774,
- "YD82l_bUhLc": 40709132,
- "YDYxQMBm50k": 61608607,
- "YE1MwI69ooU": 189880987,
- "YEEbMd2AGag": 4637789,
- "YEQNnO64wLc": 21485312,
- "YEUQXx0fx_I": 3332859,
- "YEZMReBbkP0": 4905880,
- "YF2JdYpsFcQ": 1563261,
- "YFqeMzfcyg4": 2518307,
- "YFtf-xA7_oM": 90992108,
- "YFvgM8r7Uvc": 11649004,
- "YGyZX0VoRpI": 51627068,
- "YJBqGM29_64": 7641121,
- "YJdCw2fK-Og": 3253745,
- "YJgIGwTysk0": 3278467,
- "YKHGBkOXtMk": 16009375,
- "YKQLZOq4HTA": 3542464,
- "YKzHdQKX9RA": 22688760,
- "YL10H_EcB-E": 8345150,
- "YL40aQlLSnY": 8902156,
- "YM2G4ATOcpw": 2824592,
- "YM4lE4q0fSk": 26407624,
- "YMzNkNoFzG4": 8434127,
- "YNriRslOk9A": 33758727,
- "YOT8ryWzwbY": 6019056,
- "YOYQys52sPs": 9295408,
- "YO_SwIKGMqQ": 4693888,
- "YOlP6xmw7zU": 8712867,
- "YPm6Bi-eKsQ": 12837961,
- "YQfWiDlFEcA": 19532840,
- "YRDpPeKc-ZE": 31208731,
- "YRw8udexH4o": 5296869,
- "YS_3XRj74oo": 5377246,
- "YT6XwkcPcsw": 31368252,
- "YTRctTr7MyA": 7118384,
- "YTRimTJ5nX4": 4142918,
- "YTuh7BmTNQc": 28026314,
- "YUEkOBvJSNg": 10407929,
- "YUQXdnZPdxE": 27676437,
- "YURReI6OJsg": 13050757,
- "YUzsxLi43gE": 70120716,
- "YWE9HuV0lo8": 31295273,
- "YXCJmWF08CU": 36235895,
- "YYEgq1bweN4": 59278657,
- "YYGb1Fmz6TY": 324612288,
- "YZBStgZGyDY": 4694589,
- "YZD5ifHZILE": 4465303,
- "YZRzt_AsuVs": 8117936,
- "Ya-3XHBWDqs": 20814469,
- "Yaeze9u6Cv8": 3578773,
- "YahJQvY396o": 1952910,
- "YbNVUhW-HJM": 5213994,
- "YbSEybahiVA": 16983581,
- "Ybw6N0dQIaE": 51500586,
- "Yc9NJnx58Wg": 73723991,
- "YclQE2XtaLw": 21708186,
- "Yd2YBLQUCEc": 2577906,
- "YdBXHm3edL8": 7218961,
- "YdGZaqJZbGc": 2242531,
- "YdJdeOPNY4g": 20667594,
- "Ye13MIPv6n0": 2504211,
- "YeBe-yDGVnU": 15635575,
- "YezsgIlcb68": 6651823,
- "YghRP8S2K-4": 6467948,
- "Yh4TXMVq9eg": 6529796,
- "YhHEP2W1gn8": 14078724,
- "YheIckLuV7c": 80578120,
- "Yhlv5Aeuo_k": 39843751,
- "YhsjS5CtCTE": 99131360,
- "YhxVBHKB-oY": 447220,
- "Yiy84xYQ3es": 5186943,
- "YjGE-sZhxHQ": 47585618,
- "YjOrE1C8qOc": 33198305,
- "YjT3QYfoy4Q": 3474568,
- "YlZYarC598c": 1497045,
- "YlhDUSntCI4": 57830292,
- "YnYknwUqaCM": 82189161,
- "YoHhP6a_3GY": 55963691,
- "Yo_zEyEBMmE": 1793588,
- "Yp0EhcVBxNU": 3395652,
- "Yq9W6B7XnmU": 3667782,
- "YqTbqKCiYJw": 141160774,
- "YqsATg2r4MI": 6150014,
- "YrHx2R72hFk": 16245246,
- "YsS9kk2cr94": 25453365,
- "Ysk1ySejuCQ": 15909289,
- "YtibtTFpF6U": 21023684,
- "YtvL-LQlPrU": 24215956,
- "Yu00YJ3tAlo": 2546266,
- "Yu4eqwGFJK8": 6897391,
- "Yv94eGD7cUU": 7949389,
- "YvUWkJcfp1w": 158597129,
- "YvacYWgygaA": 8509822,
- "Yw3EoxC_GXU": 2668498,
- "YwNX9uWszQY": 3362218,
- "YwnfVj5qeo4": 61783963,
- "YxMBp4Ef3ek": 13382386,
- "YyjpeoxdUXc": 2734589,
- "Yz2OosyMTmY": 5941883,
- "YzCYuKX6zp8": 16392128,
- "Z-gq3nV2mmM": 7714711,
- "Z-yv3Yq4Aw4": 43106655,
- "Z-zDGIEPxUo": 24071019,
- "Z0B1IyDeNLI": 1611308,
- "Z0WsfO-RI8Y": 3084107,
- "Z0XPMFL45oo": 17987269,
- "Z19-ObbmHJE": 10754657,
- "Z1RpVPbHgzU": 71134985,
- "Z1rqLNz8Zo0": 101635791,
- "Z1zdkcwosD4": 13109387,
- "Z29bpAW1AUM": 94558459,
- "Z2Zmmx0u-gE": 169144449,
- "Z30Kkrye47Y": 47008628,
- "Z36dUduOk1Y": 21484516,
- "Z3X6QqezqUg": 13524191,
- "Z3db5itCIiQ": 4081384,
- "Z3qRkxzmYnU": 1199009,
- "Z5EnuVJawmY": 6812115,
- "Z5myJ8dg_rM": 4670219,
- "Z7C4cz2HkeY": 18775136,
- "Z7C69xP08d8": 2036065,
- "Z8j5RDOibV4": 3695825,
- "Z96vkuybvjE": 5115668,
- "Z9IWg0pcpqo": 13343186,
- "Z9Jh-Q59xso": 21560545,
- "Z9KoBRGc3_s": 26652257,
- "Z9b8nnvpim0": 3472021,
- "ZACf9EecFrY": 5060768,
- "ZA_D4O6l1lo": 9961475,
- "ZAbrCJxk8fs": 7735886,
- "ZAgQH2azx3w": 21783536,
- "ZBLoUQAMWP8": 10680732,
- "ZBSo_GFN3qI": 25230029,
- "ZD8THEz18gc": 10304383,
- "ZDbM6uugJkk": 5690046,
- "ZElOxG7_m3c": 3514394,
- "ZEml96_kyN4": 1387404,
- "ZFN63oTeYzc": 16389905,
- "ZF_cZ-GX9PI": 2037311,
- "ZFt_v7Asy1s": 1350530,
- "ZGIPntpFCOc": 11389117,
- "ZGl2ExHwdak": 1261163,
- "ZH0P0uBY3PY": 24903130,
- "ZHkO4p8Ec0o": 2704524,
- "ZJ39gHgz_Dk": 16404685,
- "ZJdVCIljBVI": 18533847,
- "ZJm57F8NGEc": 38968946,
- "ZKKDTfHcsG0": 3274429,
- "ZKvatbn4a_I": 19158016,
- "ZLC8xRNcJvE": 80249403,
- "ZMH1mhupHI8": 36175470,
- "ZMLFfTX615w": 4505881,
- "ZMitVox1veo": 234463778,
- "ZN2PfqZ4ihM": 8503827,
- "ZN48Ub3k8uE": 8821203,
- "ZN7YaSbY3-w": 4515176,
- "ZNtzWpU80-0": 7755849,
- "ZOYRb2sYrL0": 16101115,
- "ZPRMFBN8p4Q": 102685386,
- "ZRGczIT9Cfc": 19690705,
- "ZRMSHG18aMY": 6799470,
- "ZRRG386v6DI": 20540818,
- "ZS157czfx4E": 4887233,
- "ZS1OZj_oWao": 3399000,
- "ZSESJ8TeGSI": 10331749,
- "ZSLMm5KNGEc": 10084936,
- "ZSh1ksh1iO4": 19265591,
- "ZSsBh4Ybbj8": 2119423,
- "ZTKAn9YNbNY": 20759301,
- "ZUEjRYe7MRk": 8090281,
- "ZUHpAaVpiY8": 26541817,
- "ZVSVHvJRy8U": 22858927,
- "ZVUH4-Wsdwg": 70811339,
- "ZVl1M3D2B80": 15370539,
- "ZWSoyUxAQW0": 12499301,
- "ZXJMwIDx29Q": 57457794,
- "ZXUpfcTvSaI": 11681070,
- "ZZ39o1rAZWY": 12719261,
- "ZZQzMeFoZY0": 19684034,
- "ZZdLl8v2VVY": 5436990,
- "Z_Cjg3Gla_0": 7281023,
- "Z_DcXewHHA8": 2080900,
- "Z_GWBW_GVGA": 15125126,
- "Z_NHrwK6ALE": 1141526,
- "Z_P5rqxeBVA": 311248105,
- "Z_m9_WOdZ_k": 37607254,
- "Za7G_eWKiF4": 2672935,
- "ZbAh3QoKd3U": 10142085,
- "ZbN_ispEm3A": 50600177,
- "ZbZ-t1FmnKY": 23259825,
- "ZcaPndok1hc": 2980587,
- "Zcpwdcvz3KE": 37494209,
- "ZeATszO-6e0": 9581637,
- "ZeHRxcAS2Gc": 1723798,
- "Zet3X0zLs9A": 4855268,
- "ZfMl8oAL2Rs": 12721181,
- "ZgDIX2GOaxQ": 17857826,
- "ZgFXL6SEUiI": 14356375,
- "ZgJHEp7XwAs": 4355433,
- "ZgzpTx-s9Zo": 3587508,
- "ZhFPZA35e3U": 1754982,
- "ZhROXmbUVKE": 1018727,
- "Zi4Fqc8Fkws": 37730770,
- "ZiqHJwzv_HI": 2720815,
- "Zj-a_9cd5jc": 2092357,
- "Zj3v-0Q3dpc": 89402344,
- "ZjTS8dBsF4w": 16186456,
- "ZjeMdXV0QMg": 11684129,
- "ZlhrXO1-osA": 1784938,
- "Zm0KaIw-35k": 2299214,
- "ZmqK0X1psDA": 14052469,
- "Zn-GbH2S0Dk": 1987333,
- "Zn03u3-U1fk": 142106280,
- "Zn2K8UIT8r4": 24655362,
- "Zny3nM8V-D4": 841765,
- "ZoiY6ZLEKaY": 38014740,
- "ZouQdHSyelg": 8577475,
- "Zp5z0wa0kgo": 2456955,
- "Zplk5NcBt3c": 8795218,
- "Zps2uH8aWVU": 8056930,
- "ZqWB25yUWnc": 18484573,
- "Zqt3btS1FwE": 13793548,
- "ZqzAOZ9pP9Q": 3901716,
- "Zr72qWNMk7E": 4915183,
- "ZrKw-SLzNrw": 12149152,
- "ZrMw7P6P2Gw": 9074034,
- "ZrbbKMnPDUk": 5151899,
- "ZroXIBg8keA": 17719199,
- "ZsjfUUJUq9s": 1812858,
- "ZtI94pI4Uzc": 4339359,
- "ZuUWp0-gBMU": 5634418,
- "Zuugb3qq0Zg": 26533490,
- "ZvLo4bGRJQE": 1406525,
- "ZxNd67TbMLA": 17689807,
- "ZxaSItfd9ao": 7474741,
- "Zxm4Xxvzohk": 54488440,
- "ZxtlcZ-d90o": 35306503,
- "Zxvc6iPKdec": 3962287,
- "ZyOhRgnFmIY": 4505451,
- "ZyyaE3DIxhc": 19011832,
- "ZyyuflY5k2k": 37869706,
- "ZzwuHS9ldbY": 7651636,
- "_-1m1GsuH1M": 8873741,
- "_-I3HdmyYfE": 5007145,
- "_-a-yNubpk8": 6931896,
- "_01wqwsb66E": 2463761,
- "_0TqG8-N8DI": 14768889,
- "_0YdFG17fQc": 141826114,
- "_20mkyAB7tY": 14252635,
- "_2OIPwDEWFQ": 285930063,
- "_2pGxgq2D3s": 6423025,
- "_38xl7p4VaM": 17088797,
- "_3BnyEr5fG4": 8678416,
- "_5ei_I02huY": 8093364,
- "_5lmQ_dQOU4": 8817478,
- "_60sKaoRmhU": 22534574,
- "_6kwhF6hoqQ": 3580130,
- "_6uAjslPNuU": 31125396,
- "_7Jmj6MriKg": 9799797,
- "_7VHfuWV-Qg": 7592019,
- "_7aUxFzTG5w": 5317324,
- "_86K0yQ8BQY": 1324234,
- "_9x2cqO7-Ig": 6454735,
- "_AuTtAkRN3w": 10378452,
- "_BFDgTci0ck": 29113361,
- "_BFaxpf35sY": 6014265,
- "_DEScXFyI8s": 6469801,
- "_DNM039pUXE": 27993362,
- "_DgeQ7rpIHI": 112079429,
- "_E3gx_yQhHQ": 4182174,
- "_E9fG8BYcBo": 4490532,
- "_ETPMszULXc": 6322865,
- "_ElAuQyw4uA": 4731326,
- "_G9JwTwjulA": 5517800,
- "_GinTV94hUk": 23885636,
- "_HFTRQRpzFM": 2702163,
- "_HJljJuVHLw": 9076997,
- "_HXl3mu1IoM": 20738236,
- "_JGdeRfJJ2U": 71057384,
- "_JpS8k1a9yE": 15087577,
- "_KyyVhlUDNU": 37558294,
- "_LDR1_Prveo": 20721282,
- "_LPh72gx6GE": 8411638,
- "_Lj_F9GADa4": 16192021,
- "_MIn3zFkEcc": 1061962,
- "_M_zc7DDZbU": 18821661,
- "_Md5nli5OII": 35177487,
- "_NB5-Z0pOyc": 35712830,
- "_NWc3C3cTNA": 12969594,
- "_NznT4Cn8As": 8252978,
- "_QKR8I5VE-w": 1804585,
- "_QM-DfhrNv8": 184282229,
- "_QTFeOvPcbY": 3281701,
- "_QdS8xjYL48": 95914937,
- "_RQ5m32t9zw": 191319694,
- "_RTF0DAHBBM": 8610220,
- "_RrZggEhSJA": 11523064,
- "_SKmqh5Eu4Y": 37821978,
- "_SpE4hQ8D_o": 8182697,
- "_T60pBGcoQU": 10783448,
- "_TnPWbtoLs8": 21737221,
- "_Ub-jKHFEQg": 188674933,
- "_Ucdj37XOHk": 12026614,
- "_UrfHFEBIpU": 7882837,
- "_V9BhPURRw0": 40162972,
- "_Vxg6bsNgYU": 301502219,
- "_W1ApWgsIug": 16667215,
- "_WAi2fwUqN4": 22181954,
- "_WOr9-_HbAM": 3543601,
- "_WXndBGQnyI": 8533710,
- "_X5erR9LKUs": 22204052,
- "_X_QwpXsdOs": 8162308,
- "_XdW_IVIOQ4": 4688621,
- "_YXF7WDpWpg": 2118587,
- "_YxzwkCv0Ik": 4089428,
- "_ZAlj2gu0eM": 50166688,
- "__afuK1CMpQ": 49368411,
- "__gi413xGC4": 20154396,
- "__nkbr6DeTg": 3504210,
- "__pl88NO9Jw": 105899400,
- "__zy-oOLPug": 15588088,
- "_alU-o_qDt8": 202457760,
- "_b-2rZpX5z4": 1992041,
- "_bBAiZhfH_4": 4040749,
- "_btQus9HV_I": 1688543,
- "_ce-IVjQYws": 34009718,
- "_cooC3yG_p0": 5634616,
- "_dLpDljQWis": 8453323,
- "_dObpPBwfU8": 45710616,
- "_eAWDuLYVfg": 5034008,
- "_eBq2hRETmA": 21331083,
- "_eEONOJHnEs": 7260820,
- "_fAgls5bGXs": 201644546,
- "_hrN4rVCOfI": 2809494,
- "_ikPWdEFqFs": 69198520,
- "_irJM-um6HE": 4018495,
- "_jMyz4ZYc-Y": 11133467,
- "_jiI0AV8Vr4": 3000590,
- "_jz7yo7L3Z0": 20042053,
- "_k3aWF6_b4w": 4799465,
- "_ka1HZS-Egc": 8679627,
- "_kbd6troMgA": 6229070,
- "_kfB2qKjdgM": 18801075,
- "_l0Mfsu__gU": 7006133,
- "_lzdhIHLwcQ": 59649961,
- "_mGszRbve9s": 31820035,
- "_mWHWJiMKXU": 18556921,
- "_npwsLh0vws": 1409259,
- "_nzaMQKpPLM": 22284156,
- "_oodhLhuD5U": 7810426,
- "_osI4x5XOzA": 72689965,
- "_p-WyPg1sbU": 14061004,
- "_pqXW2SeS4c": 52643405,
- "_q25hz5xLdk": 3794947,
- "_qB9JCpr8Co": 10472707,
- "_qzs1zozTBo": 3288790,
- "_r57JvsDVCc": 33568114,
- "_rdhFaROsVA": 31355463,
- "_rof2ExUzOU": 7125813,
- "_s_-J1DFXnQ": 125791416,
- "_saunfB-wCQ": 21268563,
- "_tNnI_w6TTQ": 179461851,
- "_uDb0ZdGb8w": 5033027,
- "_uTAdf_AsfQ": 31312361,
- "_uUD1ZP79tE": 16037497,
- "_vBJkK4eocA": 37034583,
- "_w5NGOHbgTw": 20000766,
- "_w9AwycMm2g": 11297708,
- "_yR9DBHMFXE": 55670298,
- "_y_Q3_B2Vh8": 4255169,
- "_yv3BrPt-cs": 6671724,
- "_yvdb_0NGT8": 4165047,
- "a-LoetNvu0U": 579854,
- "a-R8qpea6lc": 3647514,
- "a-e8fzqv3CE": 25105463,
- "a06Rn5RTQ40": 152720260,
- "a16uKH2K7gM": 116551490,
- "a19T5CX2b-g": 17083134,
- "a1AhZoWTLUI": 372074565,
- "a1EbpU4oQCg": 8449018,
- "a1Ye5RcWOqg": 11398812,
- "a1lVOO9Y080": 7804553,
- "a29qZSRDBdE": 11333458,
- "a2Ia_ZlUCaQ": 5350043,
- "a3NFAnHxpKw": 7469380,
- "a3XcYsXQYaM": 10933674,
- "a3acutLstF8": 9604541,
- "a4nfbZYZ3SI": 267475108,
- "a5QnXi_lZII": 19168955,
- "a5YZ7-JRSUE": 19389752,
- "a5sFUXkxyGc": 13188505,
- "a5uNoOnEy_A": 16579601,
- "a5uvg9PSJcY": 26905288,
- "a5z-OEIfw3s": 59770386,
- "a67MCzUjUXA": 33560521,
- "a6JFpAMgy94": 16038943,
- "a70-dYvDJZY": 12704328,
- "a7wYAtMjORQ": 8103890,
- "a8LzhzcEunY": 2482674,
- "a8g6ma0MBaA": 113364900,
- "a9QtIfPIQl4": 49270014,
- "a9aUMpGs6c8": 4885666,
- "aASSUcUSBro": 26227299,
- "aASUZqJCHHA": 3453752,
- "aAfBSJObd6Y": 22108847,
- "aAfMps_VyOY": 7743386,
- "aBBTiPsYUVA": 19727341,
- "aCbyeNsc1Ck": 19415118,
- "aDCXPdzyS0s": 3111106,
- "aERRyWMwyvk": 26230254,
- "aF6EHTtyYqw": 29484393,
- "aFV9dk5PsPA": 17305720,
- "aGwT2-RERXY": 6561284,
- "aHx3k9NhIEM": 25730764,
- "aHzd-u35LuA": 4139876,
- "aINeMQH77jg": 2691108,
- "aIjzkiijGnA": 7485244,
- "aIvYdSzLGoI": 24832926,
- "aJy5_p_LAhQ": 9080876,
- "aKAw-DyZa6g": 3848412,
- "aKRDvSZ-igA": 10197466,
- "aKeDUvpfOfI": 11096463,
- "aLJzEl5st8s": 136959738,
- "aMIyUsF75Pw": 8523031,
- "aNDnU3udYBg": 7183265,
- "aNeCGxJVG7w": 2536607,
- "aNkrawaaiZQ": 7524144,
- "aNqG4ChKShI": 6415551,
- "aOSlXuDO4UU": 9714908,
- "aOeKj-w-3fY": 58632851,
- "aP-IPzDzasM": 5110888,
- "aP1KZzgR_dg": 209900051,
- "aQE5PcQQ2b4": 26857713,
- "aQxyXfIfa9A": 6375492,
- "aSY8XPGChAU": 12625344,
- "aSokFEpoJFM": 18508967,
- "aT2UN7y1rhc": 2152474,
- "aTX7DcwQE-k": 9782775,
- "aTjNDKlz8G4": 8235612,
- "aUBJtHwHASA": 5740851,
- "aUUi1DrghQc": 7523975,
- "aUmApJMfUTc": 5623091,
- "aW0blf6lWQc": 20113263,
- "aXhHcqQTrIg": 31155106,
- "aYp39AaZqvI": 75214430,
- "aYqq79xS8rk": 24759654,
- "aZl9csOSvQU": 10657909,
- "a_0Sav-Ue90": 3863543,
- "a_Wi-6SRBTc": 4479801,
- "a_Y9wBQ610o": 9009577,
- "a_bKCdxLkF0": 34899080,
- "a_mzIWvHx_Y": 1660746,
- "abPkNFzxeE4": 46615645,
- "abYAUqs_n6I": 16585252,
- "abc1Y4X-id8": 29760113,
- "abq95BTwOGo": 85190753,
- "abuhkDhowyc": 1827199,
- "ac0Kq3jSsp4": 211590433,
- "acQYX4nwhCk": 3171985,
- "ad5e-jy-eqs": 8091299,
- "aeyFb2eVH1c": 7767462,
- "afM6_VFaIss": 15541302,
- "afWnU10ZNfg": 13718048,
- "afgbUjRYt3A": 762300,
- "agjG7kgixJs": 154966510,
- "ah39bUxYDEg": 8317450,
- "ahXIMUkSXX0": 70765462,
- "ahaHgqwt_LA": 5321109,
- "ahdKdxsTj8E": 1513068,
- "ahib7LGDysQ": 3027454,
- "ahyWUV7AwKw": 3215057,
- "aietYaTqBss": 2420686,
- "ait3g1h8Wp8": 24538085,
- "aiwy2fNF_ZQ": 4791529,
- "aj2el_owSg4": 76119029,
- "aj34f2Bg9Vw": 14489880,
- "ajLgwCygHsc": 18609207,
- "ajZzavtog9I": 21327025,
- "ajeETSrukxY": 13342878,
- "ajl1UdtYUCA": 8807512,
- "akm5H2JsccI": 26021878,
- "amMkXQ1s2ns": 249407436,
- "amv4Ed15YMY": 6263161,
- "anlOhNHlqwg": 2505376,
- "ao9cx8JlJIU": 3127768,
- "aoXUWSwiDzE": 15133290,
- "aobWzlXIooQ": 3450130,
- "apWQoMKVmW4": 6401099,
- "aq_XL6FrmGs": 2723632,
- "aqsIWLqlDhE": 5488278,
- "arWBWBfNMB8": 3335367,
- "arY-EUZDNfk": 1009437,
- "are5VmVfK7Q": 22899012,
- "asLQmxK7ExY": 18249515,
- "ascpn9AjCIk": 60819457,
- "asyIsn59Lnc": 9271869,
- "atI4QH2acuw": 3280925,
- "aubZU0iWtgI": 27250297,
- "av947KCWf2U": 7985518,
- "awGM1UAok_8": 782343,
- "awzOvyMKeMA": 8457201,
- "axB6uhEx628": 17622521,
- "axG9HuqViDY": 40525401,
- "axGgnXyuiTg": 2556938,
- "axP8LfkPvF0": 242376167,
- "ay1QGPg2R98": 6864197,
- "ay8838UZ4nM": 7330235,
- "ayKHmN90ncc": 3186590,
- "ayP43bc7kww": 5016372,
- "ayRpoJgph0E": 2708588,
- "ayq187m5WBw": 41670841,
- "azBNsPa1WC4": 8369500,
- "b-7kCymoUpg": 2786393,
- "b0cgLILc2Eo": 5957453,
- "b0sYucYw6F0": 7093023,
- "b1QFKLZC11U": 10728494,
- "b22tMEc6Kko": 1060191,
- "b269qpILOpk": 8112652,
- "b2C9I8HuCe4": 2745562,
- "b2IpkXid-ec": 6332976,
- "b2rwWECbEHg": 89796163,
- "b3xMC6zdrvM": 22301816,
- "b5kDRza-Xqs": 26855524,
- "b6VQv76BQDs": 1532918,
- "b6WtwQddAcY": 2794767,
- "b76wePnIBdU": 3332375,
- "b7JTVLc_aMk": 13931509,
- "b7t9DgK8ZqA": 85037477,
- "b8CWoxRYBDo": 21334698,
- "b8q6i_XPyhk": 3309679,
- "b9H22F0Qbgw": 1281469,
- "b9NZvAhvIwQ": 6818044,
- "b9XDyXiJD7U": 48515623,
- "b9mBLNOr8rw": 25210447,
- "bAU1MLRwh7c": 3503847,
- "bAUT_Pux73w": 5460586,
- "bAerID24QJ0": 2172033,
- "bB1K4H0vx0g": 159970603,
- "bBQVaRnHqLs": 13262927,
- "bC5Lahh4Aus": 8872703,
- "bCcxJlPHSmc": 4873087,
- "bEJxFs0f35o": 4519376,
- "bEm2olQ3iJA": 37963418,
- "bFj3HpdC4Uk": 12121479,
- "bFtjG45-Udk": 8429946,
- "bG8aDJPlSLU": 36153227,
- "bGNMXfaNR5Q": 12840132,
- "bGpw7NeXyBc": 17458023,
- "bIFdW0NZ9W4": 2046306,
- "bIKmw0aTmYc": 4986802,
- "bIe3nvBo8g0": 58394160,
- "bJF9R8_-0O0": 924687,
- "bJMUKNbAsTY": 16049855,
- "bJ_09eoCmag": 27491516,
- "bJb4n19sFrs": 10269025,
- "bJgZHQLLo00": 104255420,
- "bK85aZPR3UY": 6397615,
- "bL7yQRbYJCo": 19000086,
- "bLQBbA8yh7c": 3711548,
- "bLTfBvkrfsM": 4242014,
- "bN7XTFlxPTI": 21630272,
- "bNNrlzel4Gw": 5181389,
- "bNQY0z76M5A": 13902318,
- "bP__iEY9yTs": 293788491,
- "bPi1aurgNZg": 3844939,
- "bQ-KR3clFgs": 3049732,
- "bQfZXeksysw": 235482601,
- "bQioHx12JuY": 45013170,
- "bRNHz5RoXIk": 24328375,
- "bRZmfc1YFsQ": 2566456,
- "bRwJ-QCz9XU": 3852690,
- "bS6EmYzpou4": 2092840,
- "bTz_tx460EY": 2417058,
- "bU0BQUa11ek": 4574393,
- "bUCu7bPkZeI": 5623652,
- "bUez19ABrI8": 10697525,
- "bUstOWF_Ftc": 14134051,
- "bUw5AKm1Frw": 38156749,
- "bVHuI_QpYIM": 12068351,
- "bV_HSZ_W0nk": 13958109,
- "bWTtHKSEcdI": 11143454,
- "bXmODOOJcQU": 14286673,
- "bXxkxJnqt3s": 6981792,
- "bYgL6ovZE64": 21816575,
- "bYyxwxEqTQo": 24017614,
- "bZ8YAHDTFJ8": 3532118,
- "bZYTDst1MOo": 6026908,
- "b_cAxh44aNQ": 7547138,
- "b_dDoAbqp1M": 5567209,
- "b_qDLacdkFg": 10067483,
- "baifq1b1-i4": 41941349,
- "bamcYQDzVTw": 4025930,
- "bb9crNw1Bpk": 177194602,
- "bbeWLtarzrE": 14597858,
- "bcADF8WgLz4": 9052646,
- "bcCLKACsYJ0": 6376083,
- "bcrsyGxUbkA": 53434881,
- "be9rz_HOnXI": 112912639,
- "beU3xkhwgs4": 25075796,
- "bekNKJoxYbQ": 23398148,
- "bflHwVKgRNE": 26269312,
- "bfy6IxsN_lg": 60237102,
- "bh1UrCGWz1k": 5837637,
- "bhMQYdoh8EQ": 176449943,
- "bhSnU9zmai4": 7613519,
- "bhrmEy0wvD0": 6221232,
- "bhxo9Wwr4mA": 8169583,
- "bihBbqzL96Y": 124877199,
- "bj7VMsfqCWc": 329843142,
- "bjVn4WGmNis": 1712807,
- "bkNMM8uiMww": 90731212,
- "blbR5f2dq_g": 5412223,
- "blur0MemUQA": 23592831,
- "bm65xCS5ivo": 32719058,
- "bmjg7lq4m4o": 6172568,
- "bml74_PsfwA": 2428643,
- "bnGjN-Xsg9U": 7363186,
- "boH4l1SgJbM": 8638797,
- "bqcVNzObJec": 16723196,
- "br7tS1t2SFE": 3622347,
- "bs2pTBkJCxQ": 46472352,
- "btGaOTXxXs8": 6801160,
- "bvAd_oddj9w": 8891094,
- "bvcXEJbEzSs": 2906515,
- "bwOE1MEginA": 21392141,
- "bwwmq2be1So": 18366465,
- "bxGnbVOtRYo": 8960081,
- "byj5VLuLS6c": 29241692,
- "byjmR7JBXKc": 3227550,
- "bzseeIVEslA": 1859329,
- "c-_yrA-GUow": 5074797,
- "c-szOdzJiWM": 6616166,
- "c-wtvEdEoVs": 4203078,
- "c02vjunQsJM": 9881414,
- "c2MuTvQM61Y": 188683964,
- "c38H6UKt3_I": 12246900,
- "c3GCZ1_EcIo": 211382909,
- "c4fUaD4g4mc": 1178467,
- "c547u94QRFU": 9578801,
- "c6-FJRda_Vc": 1429143,
- "c7ByaI3T7Dc": 9138549,
- "c7Yy9v8dH8s": 235650019,
- "c9LwwQK5588": 8755346,
- "c9O6MHssHtw": 31247587,
- "cBi4a1iSaPk": 4303393,
- "cCMpin3Te4s": 9302305,
- "cDpBtkU2cf8": 14752206,
- "cDq1_R-J51w": 5497518,
- "cFbMqzDSVVg": 351587781,
- "cGg1j1ZCCOs": 48255268,
- "cGhKJYfXW-c": 17167090,
- "cGrqnKiOUio": 5040328,
- "cGvrADwJnZU": 119655584,
- "cIpEZXOAn0I": 5977218,
- "cJLbnWBU09E": 24407025,
- "cJXY3Cywrnc": 34136009,
- "cJnNMT-F-BI": 14990990,
- "cJvoi0LuutQ": 8138706,
- "cK1egPBjJXE": 1336524,
- "cKAF1v5hJoE": 8776883,
- "cKkacTkCjjs": 70611028,
- "cLICU2cDHrs": 23477777,
- "cLOQJVv77w8": 209529143,
- "cLP7INqs3JM": 4867091,
- "cM-SFbffb7k": 6793762,
- "cMNx17H3dRU": 21585076,
- "cMhgFt1xT7c": 7175194,
- "cMjJSUsaWvc": 6149353,
- "cN5jQ7sQMn0": 9251391,
- "cN6TDkZTAI4": 128220173,
- "cNFLqhU4MN0": 6395457,
- "cNaonU-UFcY": 16263887,
- "cNlwi6lUCEM": 9398007,
- "cNm196bVE5A": 2394925,
- "cObJ3P6QyWQ": 42673622,
- "cP8iQu57dQo": 25773718,
- "cPOjnyjii-4": 7716136,
- "cQKPvT-aEqk": 15950825,
- "cQRJYTBozXQ": 34115804,
- "cRboY08YG8g": 11650538,
- "cTNnkbKoxgw": 53456786,
- "cTveNRjWQYo": 2404973,
- "cTyNpXB92bQ": 19042160,
- "cU9L1bTDePM": 121298467,
- "cUVS0AlRyw8": 20990682,
- "cVXfChxmAlQ": 14413484,
- "cWn6g8Qqvs4": 4359441,
- "cY-iPEtvJAE": 7143784,
- "cYUVtdpTlEo": 24584619,
- "cZuYdIRAIAs": 62491211,
- "c_8QQbVQKU0": 8934287,
- "cbD_MVIUBf8": 36406843,
- "cbZEsg56mdo": 24207209,
- "cbkTTluHaTw": 10429748,
- "cbz01PPQ5ow": 19369711,
- "cc8sUv2SuaY": 44044787,
- "ccaCl1GKdJ0": 2262807,
- "ccrYD6iX_SY": 14757338,
- "cczABrLd_uA": 5626610,
- "cdMF0cyuWfw": 5015104,
- "cdRLBOnLTDk": 1779810,
- "cdY0b4ziR5U": 1713661,
- "cdvV8O90HJM": 160033927,
- "cdxMX-gajac": 355714114,
- "ceDV0QBpcMA": 4196059,
- "ceM2u6IABWU": 5337083,
- "cePkWyXRvIQ": 7939207,
- "cf1-CwrDwrA": 11427948,
- "cf_i8LicBEY": 12046312,
- "cfr-yZxTH8Y": 2401224,
- "cgGnvH0Ozvk": 83820863,
- "cgV2ju-UEnw": 21027732,
- "cgZHD9We0mY": 146917702,
- "cgccQVcFLi4": 59336345,
- "ch61milcTUU": 41525007,
- "chXMpDwjBDk": 17142673,
- "cjYHo2tS9sQ": 6784067,
- "ck0pF7xub-k": 15795386,
- "ckBKDrKVIMU": 12961186,
- "clL2jLXtX4I": 11441203,
- "cmQtbpYihAI": 21016838,
- "cmi8EnJQA84": 4563033,
- "cnCQGKx6LhE": 8584809,
- "cnhSTcjanLc": 39822482,
- "co4cHIJJux4": 16904653,
- "coDfeoi2zcQ": 1889231,
- "cppxO67e6eo": 12729833,
- "cqK3uRoPtk0": 4538492,
- "croM4PvOdbM": 38102163,
- "cstic6WHr2E": 248008072,
- "ctGkLYuUCvU": 16614018,
- "cu6rfyEMFiQ": 8798107,
- "cuShHDFBiE8": 91105943,
- "cugQ4z4cJF8": 7963921,
- "cuwMrVoG2V8": 52929744,
- "cvA4VN1dpuY": 10809238,
- "cvB8b4AACyE": 3503231,
- "cw3mp8oNASk": 1932216,
- "cwClnv9Y1Y0": 9702212,
- "cxs1d3N60UI": 10674542,
- "cyCad5HaHaE": 275053792,
- "cyZUgH4yoCo": 8925844,
- "czIYvs9zj2g": 22453306,
- "czY5nyvZ7cU": 22141516,
- "czfJKPN-HEo": 8951662,
- "d-2Lcp0QKfI": 4209165,
- "d-_eqgj5-K8": 8053054,
- "d0Sk5trLUbU": 19424826,
- "d1O54EQ1DSE": 18770699,
- "d1XTOsnNlgg": 13392787,
- "d1oNF88SAgg": 5933378,
- "d1oO1kbtt4s": 22513574,
- "d22BeBhk1nY": 21398761,
- "d2TCfex1aFw": 10471509,
- "d2cnQ5ahHgE": 4050064,
- "d3109sV6izY": 5396117,
- "d3VMo1VWFvc": 8080349,
- "d4FklnPgjv8": 1665859,
- "d4WE4SnhBDU": 3499643,
- "d4bqNf37mBY": 18619178,
- "d5UCZ9hO8X4": 6119478,
- "d5lcGCbV5cM": 7689747,
- "d7b38SLI6nc": 119172173,
- "d7rAlcNHDUI": 1811246,
- "d7zqiCrfiUE": 30531057,
- "d8-LO6FCna0": 4549937,
- "d842mfzMMao": 31124252,
- "d8De3xcVmnw": 4034080,
- "d8lP5tR2R3Q": 6403824,
- "d8vvVjfTbYY": 2579083,
- "d9GkH4vpK3w": 291839262,
- "d9alWZRzBWk": 41453446,
- "d9hQk2Mmpcw": 93531824,
- "d9pO2z2qvXU": 1428964,
- "dA1u8RD49dU": 7080386,
- "dAMNo4u6Ogc": 868391,
- "dAOWQC-OBv0": 31420328,
- "dAvosUEUH6I": 2847904,
- "dBGeri4eFv4": 2362516,
- "dBVoIUASFS0": 42533725,
- "dBrKCtx4TfA": 56590670,
- "dCOXynpDJ74": 21443418,
- "dCQbfaQZtaY": 3600772,
- "dCSH7ok7ejI": 46306156,
- "dD71fFNwVJw": 4242083,
- "dE7aS-HPwKo": 5676541,
- "dEAk0BHBYCM": 4619168,
- "dFFzAP2OZ3E": 7439399,
- "dHXzusNSF60": 19648737,
- "dHi9ctwDUnc": 52720446,
- "dIGLhLMsy2U": 4543188,
- "dJAc0mc9VYo": 1276631,
- "dJhxphep_gY": 8752623,
- "dKFE0uJayM8": 12983486,
- "dLojFRoSx8I": 11123547,
- "dLtFP6t99yo": 30301439,
- "dMzX3odi1K8": 63956727,
- "dN5XRW7T0cc": 37022895,
- "dNHtdiVjQbM": 12339016,
- "dNPs-cr_6Bk": 10501241,
- "dNk098ffjLM": 54299334,
- "dNnItWLuHH4": 2491635,
- "dNoeLF6I52s": 35870626,
- "dNp7vErqlaA": 12414939,
- "dNprN1Kbv9M": 32365257,
- "dOlkogaWF3M": 5504777,
- "dOr0NKyD31Q": 9833087,
- "dOxXl_6BDQc": 10586856,
- "dPlNsyXl-0c": 68732059,
- "dPmkIEkxXwc": 4978726,
- "dR_BFmDMRaI": 18411328,
- "dSOnLt3YVl0": 169351840,
- "dTsUyXXudvA": 41635583,
- "dTst62XXJ8g": 42318296,
- "dTwZ5N126gw": 1097209,
- "dU_rYyPGYiE": 15403909,
- "dWY25vb1ZB0": 4527766,
- "dWxcQZBM3eQ": 6769010,
- "dX0JyJRTXm4": 6386727,
- "dXB3cUGnaxQ": 16095062,
- "dYAoiLhOuao": 59199889,
- "dZPOCU10TqY": 1421932,
- "dZnc3PtNaN4": 5691970,
- "d_Q3mgcIiCw": 31637145,
- "daCT_24RnIY": 7694212,
- "daZI2j4J_zM": 76401930,
- "dam16G6cZ8k": 14131732,
- "dawGZs4TaTU": 9430944,
- "daxL1ZLrUzg": 6151029,
- "dbdVMThH1n8": 15769314,
- "dbxJ6LD0344": 2951519,
- "dc7l7Qqa8xk": 8892454,
- "ddNsfv8iaps": 25959288,
- "ddifthdMNVc": 11836873,
- "deKCm28TkRo": 8731976,
- "deRTQCXHdwE": 6211280,
- "dfO5SWYU6A4": 8588647,
- "dfZ9_vFwCA4": 11259967,
- "dfd0l10gPPY": 11730266,
- "dfoXtodyiIA": 6593051,
- "dgHksfBFbjk": 4846184,
- "dgZy7Uj8cAI": 8758547,
- "dgsogHXtwyA": 27642324,
- "dh__n9FVKA0": 2580706,
- "dhlkyIiD_RA": 11284743,
- "diCb6JkLlQE": 7975444,
- "diVGZxXh-dg": 7965761,
- "diaHpLIyWAw": 67195559,
- "dijqYyFY1GM": 12948745,
- "dirBYVjDk7A": 6539249,
- "dkxnUlg-bUY": 255520779,
- "dlMquB1efp4": 12026354,
- "dl_9NC_J6yo": 7946877,
- "dllD-6loBK4": 373661553,
- "dlpmllTx5MY": 3402328,
- "dmN_s286dHc": 10841753,
- "dmcVzFbXMCU": 1964490,
- "dnYyMHSSb8M": 9224178,
- "dnjK4DPqh0k": 10454301,
- "do1HDIdfQkU": 3237428,
- "doe_zZDjU5c": 17436100,
- "dpBA1lH39L8": 12613101,
- "dpGmVV0-4jc": 11358501,
- "dpnFYrz2fCE": 11032625,
- "dqmaxkxInZ4": 13628496,
- "dqn5CgMFfDY": 64966122,
- "drUJH-qN-as": 9670231,
- "drhoIgAhlQM": 1885997,
- "ds3-ljxTRvo": 13034888,
- "dstNU7It-Ro": 6501284,
- "dsvLLKQCxeA": 333867396,
- "dt-2AanNQrc": 3676076,
- "dtAyPy1OZCw": 4689304,
- "dtQyiDMoub4": 2017723,
- "duomXwMSPv8": 103126696,
- "durV0mnzPo4": 10993465,
- "duyYnXIhg4w": 43139645,
- "dvSa_tx04hw": 47209857,
- "dviyBH3pOk8": 2524964,
- "dvoHB9djouc": 6720667,
- "dw41PMWek6U": 2952440,
- "dwleadLC2Dw": 1412095,
- "dy12qq-ngLc": 28410505,
- "dzJNabJAPaE": 22249584,
- "dzMvqJMLy9c": 8656216,
- "dzQwIqc6dQE": 12126309,
- "dzjkh9K5Y8o": 10558928,
- "e-_92MYcANk": 178262768,
- "e0lBUViss8E": 4341773,
- "e1XCEJUqOQE": 17737371,
- "e1noAqa_Ukc": 59736534,
- "e23FYcmAG5k": 15967274,
- "e3RSRrUL1Os": 23621174,
- "e3XNXl_6NSg": 13966853,
- "e3lRt9XdV0s": 4432815,
- "e40HkNHHscA": 35955013,
- "e41Wh7jhoxc": 186427497,
- "e4MSN6IImpI": 11049791,
- "e4baNHUxP8I": 11357421,
- "e4qci9b2d3U": 14330175,
- "e523Snw21Hk": 136039084,
- "e5oGdNL1GkA": 17160571,
- "e6sh8AXz41E": 11135708,
- "e7C2LRIoVTo": 168631791,
- "e85nerRGfWw": 25497668,
- "e9cKwLhM0VU": 10238322,
- "eB5NVPzBCzM": 16380938,
- "eBYbnYNl0rw": 12309777,
- "eCJ76hz7jPM": 3885365,
- "eCrQDI1OAeU": 13543456,
- "eDv7dk9uNmM": 2376048,
- "eE7BR9HCffk": 65195600,
- "eEJqaNaq9v8": 20029398,
- "eEUK_ThrHuQ": 20584530,
- "eEUvRrhmcxM": 13979764,
- "eElHlE4j-vw": 9777972,
- "eF6zYNzlZKQ": 13036076,
- "eGRZKkmI_fo": 6877009,
- "eGo8C2Jshzs": 13540137,
- "eIfQ4GfSz3U": 59972962,
- "eJQzBJ6DtoY": 142534432,
- "eJUGoAtF-7A": 3446091,
- "eJxSDYO82c4": 3571936,
- "eK7Gp6AWnuY": 27556686,
- "eKj12_KS8m0": 42186600,
- "eKw3Aq0vvbo": 2801897,
- "eL965_Lscb8": 16509555,
- "eLUmpX_h9sw": 7228257,
- "eLdhifUUMmk": 4882849,
- "eLsegxXzaiE": 21374234,
- "eLyLbaXfJXo": 10760448,
- "eMl2z3ezlrQ": 5520266,
- "eNhrYgYV0MA": 81900090,
- "eOksHhQ8TLM": 58387320,
- "eOp-GTRP-to": 239725351,
- "ePWrbBJgssw": 13049864,
- "ePh8iCbcXfA": 4509843,
- "ePwN6rHhNyU": 37216328,
- "eQEUHxzLmDE": 70889110,
- "eQXGpturk3A": 15922114,
- "eQf_EAYGo-k": 37441219,
- "eQjpTvM4lR0": 1713610,
- "eQzbpL0uWVA": 6544859,
- "eR8vEdJTvd0": 28839428,
- "eRImmzuExyg": 12025595,
- "eROhIFBGKuU": 20041351,
- "eRWMxDzxHyc": 60333741,
- "eS-_ZFzHjYA": 4532443,
- "eS50mYKCL_M": 14113132,
- "eSM1p2vN7vg": 17882158,
- "eSXZwk8axmI": 18551759,
- "eSXvvUmu7II": 1021067,
- "eSjbEWb4Qp4": 5276345,
- "eTDaJ4ebK28": 13661813,
- "eTSVTTg_QZ4": 2147892,
- "eTWCARmrzJ0": 2370431,
- "eTwnt4G5xE4": 3035426,
- "eUF59jCFcyQ": 9596740,
- "eUQPJB07btE": 3841407,
- "eUsWUiVCq5U": 83103864,
- "eVl5zs6Lqy0": 7528043,
- "eVmLvbB6L18": 13441399,
- "eVme7kuGyuo": 3145625,
- "eVnwEIvwmCE": 41998213,
- "eXGVAfv08AQ": 29005289,
- "eYBlfxGIk28": 7533591,
- "eYS3-ShEnbs": 427701924,
- "eZZkhSl8lMA": 15051417,
- "e_Us5TGPFe0": 21783615,
- "e_WWO2O5Nb8": 23845040,
- "e_phjB19ZEg": 278842568,
- "e_tE84565Co": 31633742,
- "e_wKQT8Un5I": 17886595,
- "eaHzeFUxSYc": 18256425,
- "eajQ4ZY2r-U": 19010853,
- "ebGzJabI3mw": 146571295,
- "ecA0shEaARM": 22131508,
- "edVnqL2Z59A": 2740833,
- "edgc5bX1T10": 39389035,
- "eeNfDr4ojZg": 91198002,
- "eejmYz0O3YE": 11127236,
- "eeoZMM14ph4": 31200249,
- "efE8xuvUjAo": 5086182,
- "efQjBTPhS_0": 204228037,
- "eg4r1ev0xYs": 9520022,
- "eg7ltl5vll0": 96334954,
- "egNq4tSfi1I": 3598474,
- "egjDLFX9VHg": 5815694,
- "ejIjaaocVvE": 8470862,
- "eji8zKa7H7s": 18268688,
- "ekVXPYwvaJE": 185917926,
- "el6nuUsff84": 16251964,
- "elBVeO71_jY": 164171426,
- "elJUghWSVh4": 9056822,
- "emOgJCoUy6Q": 15336997,
- "emdHj6WodLw": 3139979,
- "enr7JqvehJs": 7033114,
- "eoJGBr-tJXo": 13773157,
- "epgwuzzDHsQ": 12773543,
- "eqC8gVxxB-s": 111767214,
- "eqKnx5Yk508": 5429474,
- "er1L9BB6UoE": 18570973,
- "erZe85NrsK0": 5361723,
- "erjMiErRgSQ": 9185715,
- "ervHbKa7R5g": 7603360,
- "esJ5MbAHswc": 13404359,
- "esbqpgAD-EM": 118561198,
- "etiD38iuYZk": 27959803,
- "etmRI2_9Q_A": 231310224,
- "eu_GFuU7tLI": 7849447,
- "evdORkjbVMw": 58491399,
- "ewEorPD4kdA": 5132272,
- "ewSw9tF9Z0E": 3378505,
- "ewu_7Dmj_18": 7171033,
- "exBNBmf-my8": 219599411,
- "ey_b3aPsRl8": 3386427,
- "eytyVWA5ZQs": 19110739,
- "ez1MIB8_2O0": 1083283,
- "f-gCYOCFMYc": 3344063,
- "f-wz_ZzSDdg": 4535502,
- "f15zA0PhSek": 7177926,
- "f1eP2m01PCQ": 21118485,
- "f1jBHNQb2-A": 30591834,
- "f2BWsPVN7c4": 16329097,
- "f2ExnG0mGxg": 29455960,
- "f3TQEpL7dk4": 8353420,
- "f3nJOCfkerI": 5284636,
- "f3ySpxX9oeM": 3790904,
- "f4MYCepzLyQ": 15204558,
- "f6OnoxctvUk": 12417019,
- "f7J0WQsajX8": 40529754,
- "f7cX-Ar2cEM": 6178595,
- "f8B2dBQn3_U": 2730203,
- "f8GK2oEN-uI": 11554990,
- "f8LDv2kthzw": 83139494,
- "f8svAm237xM": 5369046,
- "f93KCgI4DGM": 16266558,
- "fAUUHCZMJH8": 5636895,
- "fC2BPnoEs3w": 158575563,
- "fCdT2z0JcU8": 22218418,
- "fD7MbnXbTls": 8328028,
- "fDChjr0hvCw": 82935049,
- "fDEwHN32lFk": 27793344,
- "fEkK5MbG7PU": 259724580,
- "fEpINE1fjgc": 17076515,
- "fFdOr8U4mnI": 2913502,
- "fGThIRpWEE4": 7825085,
- "fGok2nHOjnI": 13202918,
- "fGwSr7AolMI": 1900743,
- "fI6w2kL295Y": 6888787,
- "fJHFM2dOmiY": 6815966,
- "fJiCHUimtpc": 188482904,
- "fLKOBQ6cZHA": 22125639,
- "fMG6a6c6Jd4": 12284932,
- "fMTLSOTAzWs": 7866986,
- "fNlp0UMqUtM": 14423600,
- "fNzM0lQHZsk": 2531126,
- "fOXo4p4WDKM": 7194713,
- "fPc20_vtlaM": 42757688,
- "fQt69_Q2CTw": 9709503,
- "fRTx45FJWto": 8005320,
- "fS-YgKwAco8": 15099898,
- "fSk1Crn3R2E": 7268185,
- "fSu1LKnhM5Q": 11290730,
- "fUxSB3yYIbs": 4974555,
- "fVsxYtXOIXg": 2652240,
- "fW1u-OFbA1M": 19814377,
- "fWkewBPMKEk": 199921924,
- "fXF6vm-6TBE": 45510700,
- "fXyDY6ah7k4": 64223950,
- "fY0jAVfmcqM": 16571529,
- "fYQ3GRSu4JU": 3892672,
- "fYUpLvM5X7A": 27567170,
- "fYXqj_UPsXg": 46533716,
- "fY_ejjMRYg0": 11284195,
- "fYbLyOrl8gs": 17918021,
- "fYzoiWIBjP8": 9303699,
- "fZO-JylMFqY": 2671488,
- "fZtUn_THXnk": 2210407,
- "f_DTiXZpb8M": 10957777,
- "f_Z1zsR9lFM": 8590568,
- "f_yKNFyUZMs": 10490091,
- "fa-VZ-SDxgY": 13771020,
- "faUh3bAxomM": 5036982,
- "fa__960kzVE": 5767244,
- "fakiCFD41TI": 50296220,
- "faqhDcrWfHQ": 34961676,
- "fbwW9mHFcgk": 38772609,
- "fd1eLcFCxlE": 1434496,
- "fdGNOb3T2_8": 4239476,
- "feNWZEln6Nc": 7287559,
- "fh8gkPW_6g4": 1831708,
- "fif5ghe8JM0": 60797660,
- "fii9QEVJPas": 9690913,
- "fk_CyvXeLcs": 110416815,
- "fnuIT7EhAvs": 995349,
- "fp9DZYmiSC4": 9660111,
- "fpLNz9ZsdO8": 9603600,
- "fpgvjMKCyAA": 59792770,
- "fpq0eICjuSI": 10438331,
- "fpt4WW3EUxY": 7075507,
- "fqnPabGV6A4": 15567456,
- "fr-8tjLoeDw": 3487127,
- "frBJEYvyd-8": 4626854,
- "frE1rjhH77Y": 51626468,
- "frUCL0snbPk": 11733196,
- "frd8j6fMuHo": 8067970,
- "fsTD_jqseBA": 2813347,
- "fsaRisPpzjU": 8417284,
- "fslMG-pmCeU": 1621357,
- "ft5gJbqdzfY": 48514388,
- "ftEVCrKfIVM": 3947747,
- "ftndEjAg6qs": 1610602,
- "fuSOY9r1R6w": 19492087,
- "fucyI7Ouj2c": 13834226,
- "fuwUltMAdYQ": 18659036,
- "fv9h29ZChfI": 6692577,
- "fvC0dm2wzIo": 12295877,
- "fvtv2uYjo_E": 6177470,
- "fwBqEfjCyL8": 5961814,
- "fwSGKbmuHFI": 7625323,
- "fwzEbzgPszk": 3012574,
- "fy2TlYnYIzA": 15330560,
- "fyJkXBvcA2Q": 7562749,
- "fy_muPF0390": 16779849,
- "fyshrv6YDVY": 890765,
- "fzF2AgL35qE": 20613881,
- "fzgo6-IdkJA": 24319788,
- "g-SfwjbpA4U": 1574777,
- "g02RnGXCXrQ": 67490706,
- "g0LPpW6Iqzo": 17403802,
- "g0_bWq24Np0": 10476809,
- "g0iKG-ieZ2s": 41522794,
- "g1ZZIee9zk0": 6335053,
- "g3LrOw1JMi8": 1803964,
- "g3MqSdO5Ubc": 22945041,
- "g3kDdg8r6NY": 42148137,
- "g4XZGhnFOwM": 41286274,
- "g6QuuoTs2Oo": 24434352,
- "g6SJ6LBl51o": 21465175,
- "g6nGcnVB8BM": 3556924,
- "g7GXj5QTnJw": 10607302,
- "g7wX-feyWac": 32878391,
- "g8sxNa-E-H0": 21451483,
- "g8yk6zQDAek": 3263366,
- "g9qJ19vmGQA": 21651339,
- "gATXnxAE8sI": 16865195,
- "gAV9kwvoD6s": 3406395,
- "gAbadNuQEjI": 14449475,
- "gBKBKfikLbo": 47103434,
- "gBxeju8dMho": 21379593,
- "gD7A1LA4jO8": 6071701,
- "gDbpcwwUgjI": 7078754,
- "gEEgicZzwMU": 35206137,
- "gEGKvx1wlFg": 4750532,
- "gF0aA-si89Y": 14511961,
- "gFFvaLzhYew": 108421755,
- "gG2HYC-Aw9Y": 9951081,
- "gGEP_PjLjw4": 65946674,
- "gGXnILbrhsM": 10569697,
- "gGeC0ntvxR8": 28364035,
- "gHTH6PKfpMc": 7080237,
- "gHlcOCP-Cxg": 49068136,
- "gHpl5UcgRkI": 14251979,
- "gHs3zuRek7o": 6617294,
- "gIQgnSfUB6E": 8079903,
- "gJfOlBMfYkg": 22359502,
- "gKhw23Tfn1U": 8135099,
- "gKywkLHV6Ko": 2546670,
- "gL3HxBQyeg0": 7427963,
- "gLHUCUv1e5Y": 4892850,
- "gM95HHI4gLk": 95988268,
- "gMKtGulgGH8": 10264233,
- "gMcs6RF_LrQ": 7908253,
- "gO49s8WlUis": 31636545,
- "gPbN26bYyN8": 1914093,
- "gR8-vRg6Yp0": 5019290,
- "gRKZaojKeP0": 6337743,
- "gRntusF_tVI": 11804933,
- "gS6TfWUv97I": 6814443,
- "gS6s3MGZlRc": 4829811,
- "gSEYtAjuZ-Y": 14539445,
- "gSzxeL64Cn0": 15394822,
- "gU-5bjpAPmA": 48417728,
- "gW-7yeUW7-k": 66090025,
- "gW54YZzQsHE": 113147002,
- "gW8za1t2nFg": 7490561,
- "gWMTTP58_J0": 5283536,
- "gWSDDopD9sk": 7087131,
- "gWqYXa7r_V0": 4203156,
- "gX9aKDeAOz4": 10229484,
- "gXa6JIv5WlQ": 9750512,
- "gXnHodHNusg": 15154687,
- "gY5TvlHg4Vk": 8595552,
- "gYcwNXHrtlQ": 15421796,
- "gYpokkRFvO8": 23220593,
- "gYv8sttBIqs": 8673810,
- "gZMvA2Apg2A": 2409149,
- "gZeliSjhkpg": 17536222,
- "gZu9Hhz23EY": 20472693,
- "g_agha5-Lhc": 1460915,
- "g_dStt4st2I": 8476577,
- "g_ijRF_NMLk": 3387498,
- "g_snytB7iQ0": 15299891,
- "gbGghzo7yEM": 1542926,
- "gbpc_JBG1F0": 7405406,
- "gcJeg4SdIpU": 8673908,
- "gcnk8TnzsLc": 3809960,
- "gdE46YSedvE": 10486917,
- "gezAvbjMiBU": 19755472,
- "gfVY7cW7VLQ": 36517032,
- "gflKYcGG6hc": 4844521,
- "ggpKKlsaeac": 58326877,
- "ghE1UnbIP4M": 47373751,
- "gh_3hch2YNM": 2828886,
- "ghgPq2wjQUQ": 42053192,
- "gibe5vJfq5w": 11924888,
- "gjKmQ501sAg": 8349515,
- "gjrGd9TjjnY": 3477642,
- "gkifo46--JA": 2674637,
- "gkyuLPzfDV0": 10523266,
- "glEP04Pzap8": 4620126,
- "glMvD6x4vqw": 12438111,
- "gl_-E6iVAg4": 4523426,
- "glumochcaw0": 15955280,
- "gm7lIcBkXFc": 16052449,
- "gm87omItizk": 5248419,
- "gmHH0wIXsog": 36662768,
- "gmKAuceSf-s": 21486920,
- "gmYPum38T00": 24653599,
- "gmo5TOxk_E0": 12052538,
- "gnCL_0uA6Ds": 9303584,
- "gndFqgEPNOs": 7970808,
- "gnyHsgTFXIY": 1518520,
- "gpIJcqY0weE": 7331341,
- "gplD1LV-lAA": 10737706,
- "gpn71-aKWwQ": 10131848,
- "gqMqYYcJgz4": 5760981,
- "gqSpWPONekE": 14329711,
- "gqrh8wbPXVE": 9907933,
- "grdcr-X4zUc": 15906090,
- "grmmM_KhQ4U": 4259900,
- "gs-OPF3KEGU": 5525525,
- "gs3fWMI3nFA": 169949304,
- "gs9O255gdEY": 8776337,
- "gsNgdVdAT1o": 10763649,
- "gsu4gjrFApA": 20319242,
- "gtlaJuBuQvE": 46104484,
- "guxLpVICBjg": 81512330,
- "gv9ogppphso": 2675920,
- "gvjFMvLVnG0": 161667929,
- "gw-4wltP5tY": 8404924,
- "gyXzJ3as26k": 43825862,
- "gyqodNhM3EU": 5286448,
- "h-31O7CaF2o": 19037758,
- "h-TPSylHrvE": 4791766,
- "h-qUlzA70nY": 79517158,
- "h0207xMD6b8": 4219140,
- "h05d7Mbd3UI": 7486518,
- "h0FFEBHBufo": 7942900,
- "h0J_RnRILJ0": 14678522,
- "h0PmFW_3iGo": 46169985,
- "h0SNEO25vIw": 3542195,
- "h2CcewghKoo": 49265780,
- "h2H6POZowiU": 11398596,
- "h3iIi56Yae8": 11727328,
- "h3lMANILkw0": 8654553,
- "h44bnIGogu8": 22893242,
- "h5P4hHAYPOI": 29066679,
- "h6Bprry-E20": 2255149,
- "h6HmHjkA034": 1873513,
- "h6YWCuuJVj4": 35527795,
- "h6mZLTpTHcU": 8988261,
- "h7-OynSK2x0": 15871081,
- "h72iwhmB6zc": 32236672,
- "h78GdGiRmpM": 7088066,
- "h7dD-8eD5oA": 263860766,
- "h8EYEJ32oQ8": 5705076,
- "h8S-dOQe1-0": 92924281,
- "h8kt1knmmrM": 2778417,
- "h9ZgZimXn2Q": 6871602,
- "hA5jddDYcyg": 19783700,
- "hAAIgNzBGg0": 9595576,
- "hACdhD_kes8": 24399990,
- "hAXnQgU4bsg": 33169861,
- "hBBCp9RvmoQ": 14173777,
- "hBES75bsh64": 36125607,
- "hC6zx9WAiC4": 4429729,
- "hCFtl4npukU": 13605449,
- "hD4ySbQYYyA": 7543983,
- "hDP6egLrsdM": 11893084,
- "hEgLzTtQj7I": 36249800,
- "hFZPl_t2GLU": 3268101,
- "hGMwMlksZlM": 143770251,
- "hH1a1v1JNAk": 15577883,
- "hH9AETxy6QI": 6474588,
- "hHBaf7PfvaY": 40622614,
- "hHC8COp_r_g": 28582007,
- "hHteUIS0OFY": 10922669,
- "hIAdCTNi1S8": 4003126,
- "hIgnece9ins": 32809935,
- "hJ18CrKU3Zc": 5543582,
- "hJ6aeSv8xIU": 54536296,
- "hJOU3EK085M": 33207457,
- "hJOqGkWElNs": 3537156,
- "hJrJJQ6myYA": 12794740,
- "hKa5Of7Dlbg": 37974533,
- "hKkBlcnU9pw": 2230283,
- "hLy2KhCUwN0": 67798627,
- "hMzFbORRiss": 73694407,
- "hPYOMKQlU1g": 33695468,
- "hPkh8kOldU4": 11869307,
- "hRgAA8IH834": 8725768,
- "hSIVWF6VYpA": 17122342,
- "hShqXKpI6KA": 5130834,
- "hSkIG4MdKqU": 27720376,
- "hTJgK-wZMcE": 1625009,
- "hTSyVgBa1T0": 8129811,
- "hTTDI49LhjE": 3512887,
- "hTi7wvRE9UQ": 5525241,
- "hTzI6x4fmGI": 15483674,
- "hV4pdjHCKuA": 23828056,
- "hWhs2cIj7Cw": 30561956,
- "hXNFjOhrihI": 179348446,
- "hXg-6YgAARk": 2624006,
- "hYzN0w8FatU": 2302096,
- "hZ827mfh1Jo": 16987357,
- "hZLcV_wIqus": 18494546,
- "hZvjH3Az87A": 4959139,
- "h_fBMnB1i-0": 977950,
- "haS083Zbib4": 12989774,
- "haidlj3cTAA": 6441001,
- "hbJ2o9EUmJ0": 8630873,
- "he4kcTujy30": 1651322,
- "heKK95DAKms": 16823544,
- "heKuwogLwnk": 16188914,
- "heYyUTL5jiM": 9686630,
- "hfG8J_X1D5Q": 55752136,
- "hg2HR9zJFq4": 18578642,
- "hgQaorvCcnk": 31540312,
- "hgtMWR3TFnY": 37210425,
- "hhbWHP44StA": 7792685,
- "hhvsPG3STho": 560020488,
- "hiRGC4lS9k8": 229089275,
- "hip59oIFSMQ": 16995539,
- "hiqlCBH-5C0": 13687807,
- "hjigR_rHKDI": 5472473,
- "hk6rA-iY1c0": 34701617,
- "hk_21n8ITqg": 293425440,
- "hl58vTCqVIY": 5556880,
- "hleYHNMDnBE": 40713335,
- "hm17lVaor0Q": 3342834,
- "hmj3_zbz2eg": 4465056,
- "hmtJV49AWio": 30888730,
- "ho87DN9wO70": 3365051,
- "hoRISaqp1Po": 3769868,
- "hoRsHNSrMpc": 10321606,
- "hoa1RBk4dTo": 3321206,
- "hopq0lq-qu4": 16269846,
- "hpBBuaiIkrg": 2559259,
- "hpWdDmgsIRE": 27783486,
- "hpY22uSAPAA": 126294554,
- "hq1bUM2tyg0": 9406586,
- "hqynp3DH9NU": 49743774,
- "hrBMFNvvOBI": 59917017,
- "hrIPO8mQqtw": 7341143,
- "hr_mTd-oJ-M": 3912379,
- "hrd3hdosby8": 173858395,
- "hrhD77JhtOA": 32811462,
- "hu067I_BcGc": 1582059,
- "huOnuYAyv6w": 22129785,
- "hx8bYUF30Gg": 8412984,
- "hxZ6uooEJOk": 37036517,
- "hxqo_DiL3pw": 3336063,
- "hyWC_zPTLsI": 72631055,
- "hy_bDS3aHO4": 2033237,
- "i-NNWI8Ccas": 7023942,
- "i-Rb4_n929k": 5381751,
- "i-sAB-Z2_bE": 1558998,
- "i05-okb1EJg": 18251467,
- "i0VS3eEGjiQ": 5144851,
- "i1CSuZdIu98": 14013476,
- "i1dAnpSFbyI": 30346697,
- "i1i2_9wg6N8": 5540210,
- "i2mec3vgeaI": 39824241,
- "i4ZiV6NIs98": 5903210,
- "i65NIcnHS9Y": 3391238,
- "i6LY9q9UIas": 5959085,
- "i6gz9VFyYks": 8425469,
- "i6lfVUp5RW8": 9554442,
- "i76VT8Ctkb8": 10804705,
- "i78cyClvaeg": 6720103,
- "i7iKLZQ-vCk": 4000186,
- "i7idZfS8t8w": 16566377,
- "i8THsl3AYFI": 7340560,
- "i8caGm9Fmh0": 20793317,
- "i8r7ZTUqB9w": 4654189,
- "i9j_VUMq5yg": 2421239,
- "i9rfWOAEplk": 10900001,
- "i9z6x1LbdW8": 6196898,
- "iA7Thhnzc64": 10419448,
- "iATjsfAX8yc": 5029230,
- "iBZb2bkn4KU": 14264633,
- "iBge6zxqWv8": 37989925,
- "iCYSKCJNbwM": 35009142,
- "iCmtnhPs7TI": 22686360,
- "iDBJK0y8vb0": 25733000,
- "iDQ1foxYf0o": 12259936,
- "iEKA0jUstPs": 7902678,
- "iEVciE2j6ZA": 29703991,
- "iEpqcdaJNTQ": 7618939,
- "iF-f2-KSw6E": 5142664,
- "iFCIgn3Q9XE": 279994988,
- "iFpyKTuC7jY": 5153724,
- "iG7dJTInT7E": 17041825,
- "iHBz77E625o": 4209615,
- "iHXdzfF7UEs": 8580317,
- "iIBQm3me8cs": 11994217,
- "iI_2Piwn_og": 11581542,
- "iJp62jEf6BI": 151330155,
- "iK0y39rjBgQ": 4617360,
- "iKGCnjBi2sQ": 40609501,
- "iKKF5yuxvg8": 20030271,
- "iKQMZ48yZ3U": 71239659,
- "iKjVbO2R4_w": 7061340,
- "iKy-d5_erhI": 7205994,
- "iL6aM2xFixU": 25590121,
- "iLFcSfzrlMk": 12782661,
- "iMqCSgqzmiQ": 14866436,
- "iNBN4PuG_fo": 147721705,
- "iNW6SYDmkDI": 88669703,
- "iNemmT1hnzA": 4319521,
- "iPROoc_o0p8": 10875830,
- "iPb5zeXTsSE": 29119409,
- "iPwrDWQ7hPc": 10769962,
- "iQ5uG6ryCa4": 52156606,
- "iQY3SdZeZ6g": 111609919,
- "iQk1M3-WvZM": 7575796,
- "iRMLQC_4pqw": 1237797,
- "iRjCDGpjJ3I": 17132539,
- "iSfXdNIolQA": 45608482,
- "iTyHURFjtFc": 36631375,
- "iTytvWs5nV8": 80597118,
- "iU1oIFPM1-I": 193769672,
- "iU58AIjh3YA": 30731204,
- "iUQR0enP7RQ": 10596209,
- "iUlYRyvQAIE": 12796854,
- "iUotrPxq2pU": 119111797,
- "iUrleWSqok4": 48295004,
- "iUzfsUOl3-A": 5760560,
- "iV6_wTrkd70": 210093018,
- "iVAYOeGmNqo": 8073844,
- "iW3EP2FE5zc": 9231443,
- "iX7ivCww2ws": 7228334,
- "iXw2V9yVCu4": 187664497,
- "iYVi_YVOyvs": 5936048,
- "i_0DXxNeaQ0": 100824577,
- "ibcyx9vaYFk": 15477405,
- "icD3l5bhhKY": 12661847,
- "icNOBmKjDLo": 14212787,
- "icUBgcwp8QE": 8085658,
- "idAmFwZ9BqY": 35268130,
- "ie0waMJxnTs": 1983682,
- "iewvEGWARBY": 3807871,
- "if5JGssffm8": 12167254,
- "ifv0KWw4pns": 35521116,
- "igJdDN-DPgA": 5764046,
- "ihNZlp7iUHE": 7567428,
- "ihXlnX3gJTU": 5094121,
- "ii1MBfj7-Sk": 22038624,
- "iiFWoXQPOJc": 16435274,
- "iiGYwCGNrl8": 5202018,
- "iimpwYBiKNg": 1800326,
- "iivtjjdSu9I": 1588094,
- "ij1TfRMODhA": 9041025,
- "ijLc52LmFQg": 30448949,
- "ik2CZqsAw28": 47450005,
- "ikFUv-gdNLQ": 10554776,
- "ikadoCpDNT8": 2593728,
- "il0EJrY64qE": 9351782,
- "ilWDSYnTEFs": 3618822,
- "ilWo7eWY73M": 19770428,
- "imkOrmHtSJ0": 74885259,
- "incKJchBCLo": 13751302,
- "inlMrf2d-k4": 3767811,
- "intPEdg4Yyc": 9069612,
- "ioH0PUdUW3M": 5656047,
- "ioieTr41L24": 1831189,
- "iokGgmrOj4Q": 303576142,
- "iorZdz4dsBU": 9704805,
- "ios3QL9t9LQ": 3983624,
- "iqHZp79FhO8": 172418581,
- "iqRTd1NY-pU": 19222968,
- "iqeGTtyzQ1I": 3987136,
- "iqf3ft0mh1M": 9720852,
- "iqpDFKIREBo": 2944635,
- "iqpIspc38TA": 2870454,
- "ir-ISPDjGno": 9336555,
- "irLOxG7SpUk": 36230110,
- "irYfbY_jryY": 105499450,
- "itQEwESWDKg": 7273481,
- "ithdrJuSj3A": 13139518,
- "itnwiwRpw4w": 8559644,
- "itoNb1lb5hY": 15866249,
- "iuaYuCreEPk": 19318690,
- "iulx0z1lz8M": 4860619,
- "iv28TEA99rg": 3954175,
- "ivQ85hdpsBE": 131588497,
- "ivbT-wvzK58": 243951305,
- "ivg3dLTarbs": 5614125,
- "ivy1QmWUtQI": 20655840,
- "iw5eLJV0Sj4": 2408150,
- "iwamZ7r2tTE": 8761653,
- "iwi2aLgnqO8": 9490501,
- "ix7nCARbyWs": 56059788,
- "ixE3APFcFdA": 67096758,
- "ixKzDofqMrU": 25793510,
- "ixRtSV3CXPA": 22449190,
- "ixf33dQDlXc": 35616858,
- "iyMHWOwBiVc": 21342489,
- "iyaq_zkxpqI": 9201625,
- "iyrOGvbSS2U": 3464666,
- "iz1SAa1JEaA": 42485453,
- "j-enxYaQMdA": 10049447,
- "j-rBgs_p-bg": 8232679,
- "j00Ep0Byu0Y": 60378782,
- "j01F5xUPAsY": 19878510,
- "j0c2vmFGbtk": 7162231,
- "j0xQmCPXTvY": 20953111,
- "j2-95i4pq9g": 32344695,
- "j24uh8cZ3wA": 58767866,
- "j2eKaxU-8kA": 32211875,
- "j2iY1cT2gEE": 27798613,
- "j3-XYLnxJDY": 3690172,
- "j3OqfduWdhc": 14851559,
- "j3oBvc3lKsY": 11382311,
- "j4PI8dEWTGE": 111900037,
- "j511hg7Hlbg": 8098443,
- "j55j1NZoAKk": 51155087,
- "j5c6pqAP2IA": 9687717,
- "j5xis6Hlnds": 3041447,
- "j7A4i7sS7gE": 11034849,
- "j7WcgW4BpqE": 19294559,
- "j7ley8tRBd0": 16280350,
- "j9ZPMlVHJVs": 22160711,
- "j9gDsCOVab8": 32352322,
- "jA1NyCE4M2g": 36270063,
- "jAOtWm_WZiE": 3402535,
- "jAfJcgPGqgI": 7601733,
- "jAfNg3ylZAI": 4512555,
- "jBu5M0gXGos": 8061990,
- "jCByVqB4iJQ": 65459298,
- "jCkhbKFZgLk": 3249500,
- "jCwRV1QL_Xs": 10060265,
- "jDIj0CUjGvM": 10405225,
- "jDNalKBb3aA": 8905501,
- "jDadorSbhi4": 12447042,
- "jEVfDSfO9Gw": 13667057,
- "jEeJkkMXt6c": 39392961,
- "jFSenp9ueaI": 5342447,
- "jFazrvLodrA": 5240105,
- "jFd-6EPfnec": 4761085,
- "jFn0dyU5wUw": 70733779,
- "jFv6k2OV7IU": 18012017,
- "jG7vhMMXagQ": 60284964,
- "jH5qflAe3C8": 17868532,
- "jHN0BfowL7s": 59227479,
- "jHPr-CuvHhs": 17741245,
- "jHlaOqbabB4": 108619919,
- "jIL333CKE9A": 5341164,
- "jJyRrIZ595c": 10351222,
- "jKUGZvW99os": 10979164,
- "jLFeqQxGtOc": 14620701,
- "jM-gvSqsP5A": 5165614,
- "jMRYMRzowCI": 52750705,
- "jMXf2lgddOg": 4296542,
- "jN03g05TSWM": 18549868,
- "jNESnky3RVg": 19613828,
- "jNUz0P5MG9M": 1104762,
- "jO1wp-Bx-WE": 6706419,
- "jOZ98FDyl2E": 10148394,
- "jOw5_m54Bxg": 65196269,
- "jPArsPD0EUQ": 5978646,
- "jPrEKz1rAno": 16589944,
- "jQ-fS2lsslU": 11213802,
- "jQ15tkoXZoA": 8964077,
- "jQ2nD8ZGeEw": 7561242,
- "jQN07Hvq6WI": 18445790,
- "jRCdXNfngLc": 7679270,
- "jRYEqOOrjH8": 17963685,
- "jR_XZyhLSA8": 25959788,
- "jRnkxSfwIpU": 19731148,
- "jRrRqMJbHKc": 11890991,
- "jSGGHmTXA3o": 81117532,
- "jSWLolne0Oc": 3317988,
- "jT0hslicvFc": 233683427,
- "jTCZfMMcHBo": 4123501,
- "jUEzjS0IFxs": 4692386,
- "jUUJSOM1ihU": 25080206,
- "jW8-Ni-MeN4": 140904800,
- "jWFcI44eRN8": 20381396,
- "jWQ4V43TJ6o": 108939248,
- "jWVdmanh8w4": 22227643,
- "jWpiMu5LNdg": 2397951,
- "jXJpbpvcMDU": 72149572,
- "jXanAqj_BVA": 25621315,
- "jYOfMszfzAQ": 3538762,
- "jYR0RlMft8Y": 32621789,
- "jYZ71Zma9Gc": 65020175,
- "jYhnlqE1cJY": 6743700,
- "j_Taf2Tgggo": 11861630,
- "j_dqT-XeIjA": 19321356,
- "j_kSmmEpvQk": 13823987,
- "j_s5p0mLZ7s": 13160336,
- "jaJ3NlqK5dA": 1825406,
- "jabo8iTesqQ": 172645319,
- "jaizi_1IB5c": 5691299,
- "jb8mFpA1YI8": 1850760,
- "jciijU8Mj_Y": 6621283,
- "jd7axD_jSPo": 40917786,
- "jdawTFsCNtc": 8196383,
- "jdytgW5wKa4": 21321578,
- "jexMSlSDubM": 7704829,
- "jgWqSjgMAtw": 4146912,
- "jgnNhL2jSXY": 7558736,
- "jhjoGx6eGXs": 7856758,
- "ji4ilvfmTEw": 9476322,
- "jiJdNWzETSk": 9228997,
- "jiq8Baz4KzU": 11358769,
- "jjcHZuTGWXk": 12993619,
- "jk3wNadYA7k": 323704035,
- "jkmwAJMERrY": 10772107,
- "jl6S0wdeWk4": 117185406,
- "jlID_mIJXi4": 2773362,
- "jl_gQ-eL3xo": 8198677,
- "jm8Sva2hnvY": 61240427,
- "jmD0LBdAvlE": 31652320,
- "jmbg-DKWuc4": 1304826,
- "jmfcACEGW-0": 10171028,
- "jnxA293u8cs": 63164781,
- "jo1bjsBbcc8": 146533794,
- "joQd0qVnX4M": 9771701,
- "jpKjXtywTlQ": 17084949,
- "jpdn1oH_0yo": 34734434,
- "jq6WFvMikBQ": 4054671,
- "jqBfRn4-9bY": 25774390,
- "jqpQPxWj8gE": 10235708,
- "jrGpD13LLf8": 7111706,
- "jroamh6SIo0": 1462870,
- "jtPvDycHVQw": 1340924,
- "jtbpusl0Vo0": 33009920,
- "ju4adbg0DB8": 597586311,
- "juM2ROSLWfw": 35021206,
- "juMTnPcfd3A": 24710883,
- "juc6Kd8jnJc": 14182038,
- "jvp0mtr1kFM": 4374413,
- "jxA8MffVmPs": 1795990,
- "jxf7XqvZWWg": 3338196,
- "jxptCXHLxKQ": 5729058,
- "jyKMEANFNi0": 2890580,
- "jyLRpr2P0MQ": 9387638,
- "k-f5VectwnE": 604989,
- "k-y6Hu6TUwA": 574824,
- "k1iHDu9GrJE": 14154651,
- "k2_PdizIgN4": 191836234,
- "k2fdtepbkz8": 142619980,
- "k3aKKasOmIw": 3770201,
- "k3qZCxL5TeE": 1541023,
- "k45QTFCHSVs": 8619948,
- "k4bqucu56Ig": 1537655,
- "k4e70nG3T8U": 29499967,
- "k5EbijWu-Ss": 8655696,
- "k68CPfcehTE": 1036318,
- "k8EfLFvUI5U": 2589794,
- "k9MEOgcc5KY": 6625221,
- "k9cj_rZO448": 11671419,
- "kAm9x3uWF9I": 7305163,
- "kBVDSu7v8os": 4263929,
- "kCM2mSb4qIU": 18103148,
- "kDOepUPGhFs": 6064558,
- "kDpdC3ZD4Ks": 24119454,
- "kFD6hzLseVs": 12901240,
- "kFkUSizmR3k": 21926160,
- "kFp7D0UxNxU": 14518548,
- "kFpLDQfEg1E": 7652089,
- "kGrk6V8tWDY": 8981113,
- "kGzXIbauGQk": 1249707,
- "kHQCDrWTDv8": 1665217,
- "kHt6BgHxa8o": 181904090,
- "kITJ6qH7jS0": 7401384,
- "kJ43GdU5Uzc": 3824969,
- "kJIqoTw_Og8": 4280133,
- "kJSOqlcFpJw": 12389869,
- "kK38qqvLQ2I": 54258196,
- "kMACjCg9r4E": 18492877,
- "kMHFY6ZrKbU": 3130214,
- "kNQnnshdNuo": 35881743,
- "kO8-RPIkuLE": 36261741,
- "kOTdVMM9Lwg": 16734174,
- "kOf8fU9iduA": 3313852,
- "kOnzZHJYzb4": 14707894,
- "kPrv93a5L0I": 97680000,
- "kQCS1AhAnMI": 10972827,
- "kQF9pOqmS0U": 5559780,
- "kQkeayQke8A": 4980299,
- "kRGLC1Q9VCQ": 85693948,
- "kRikHc8U8zI": 40868975,
- "kT4Mp9EdVqs": 3818987,
- "kVGb778WcMU": 27626573,
- "kVJTlv0A3RM": 20956860,
- "kVulo3qDcUo": 29483042,
- "kWucfgOkCIQ": 30842605,
- "kWxNQQ4hM7w": 45762302,
- "kXULrUxGzmU": 10775270,
- "kXf8MkpALrc": 11906986,
- "kY8FEq0teOs": 10158235,
- "kYWBbu-FXV0": 7945695,
- "kZZGwa7ITt0": 8201394,
- "kZk3prERLec": 1300948,
- "kZoFI_fcC74": 2118819,
- "k_wJsio68D4": 12236178,
- "ka8Yt4bTODs": 14082450,
- "kaoRrzakjGE": 16274246,
- "katx69CGBwo": 141823002,
- "kbqO0YTUyAY": 3424073,
- "kc_HjPT4NKo": 4227003,
- "kdEQGfeC0SE": 8791448,
- "kdJ6aGToDlo": 35539901,
- "kexFINXbJo4": 14614416,
- "kfySynqWWos": 2914371,
- "kgsiYzcosDY": 2331047,
- "khRX1Oo93AY": 9015941,
- "kiMNT18c4Ko": 226000135,
- "kiQ6MUQZHSs": 2523853,
- "kiaU0jX-kk0": 6450423,
- "kio82CqAEMw": 1563413,
- "kj3ZfOQGKdE": 20236370,
- "kjAjlkzkvBU": 353845533,
- "kjLwVqxwaIM": 16941140,
- "kkUvU-elGtw": 10057882,
- "kkpVr5eoyVE": 563821267,
- "kl7Xw2zk-Aw": 25494929,
- "kl8nvKKGvOg": 9177873,
- "klcIklsWzrY": 14187317,
- "knQtiFUyCi8": 82516454,
- "knv4fNNoEG8": 22160706,
- "ko-cYG3d6ec": 8238365,
- "koL4adsku1g": 26095401,
- "kpCJyQ2usJ4": 18000754,
- "kpEJwpemL2Q": 1436737,
- "kpG7xySkivg": 9003547,
- "kpqSeXpiM6k": 6283282,
- "kpxe-xbVyK8": 1128624,
- "kqU_ymV581c": 7456010,
- "ks1B1_umFk8": 16051934,
- "ks33lMoxst0": 6933805,
- "ksK2mbPgiLI": 416806696,
- "ksMisCPSs5g": 2737998,
- "ku4KOFQ-bB4": 7073499,
- "kuTKfmgzGYI": 12652915,
- "kul2ZmVIQZk": 2498568,
- "kvGsIo1TmsM": 5766954,
- "kw_4Loo1HR4": 7592113,
- "kx5LBj6P-0E": 16624366,
- "kxNaVzQ07yc": 22683133,
- "kxS37n0ASqg": 13751527,
- "kxiaae0HIBs": 237669501,
- "kzYtx_AqzjM": 718809,
- "kzhuZmzoX5o": 178590474,
- "kzpDXYJXNy0": 27194702,
- "l-6uEtTBH7g": 3593755,
- "l-QFT7XNeb4": 16429317,
- "l-l_8cSQdEw": 8834196,
- "l1hJABkcuYI": 7778240,
- "l1sBpsyRNfM": 11871340,
- "l2VrAsu0KeE": 40227469,
- "l3BoIj9_oRs": 41424000,
- "l3OkPYhDi9w": 6529175,
- "l3hw0twZSCc": 8003038,
- "l3iXON1xEC4": 2567893,
- "l3ngsl7FhTc": 19471655,
- "l4265qSL914": 9772807,
- "l4hMDy_JMEQ": 52025525,
- "l5MrtV7ZN88": 10133612,
- "l5TsKWd-fO8": 15075085,
- "l5VbdqRjTXc": 6681033,
- "l5aJ1Y1CiEs": 25611071,
- "l5n6zIn4NzI": 13681212,
- "l5xbFna_j0Q": 6492550,
- "l5yMz2lFgx0": 17198584,
- "l5zJvZKfMYE": 16697663,
- "l6T4RhlgkG0": 7169389,
- "l6jdWkH3wfc": 301517499,
- "l7h8A6SX5kY": 1722276,
- "l7p1X5pdDoc": 2131753,
- "l9ft9jpriNA": 2517558,
- "l9j26EOvTYc": 21160384,
- "lA3sjWwu5-s": 5170867,
- "lA6hE7NFIK0": 501097039,
- "lA8pSpp-FS4": 14391319,
- "lBDT2w5Wl84": 6620612,
- "lBP7739C83s": 91534356,
- "lBqShvm4QRA": 10620001,
- "lBscLuttQq0": 1111175,
- "lCRGNykWqFI": 15589678,
- "lCRePFf4zNs": 12383114,
- "lCsjJbZHhHU": 5352720,
- "lCvBp73ZJ-A": 17369539,
- "lD7BHl5W86Q": 127520808,
- "lDXaju6JoQ0": 1176763,
- "lDY9JcFaRd4": 5296557,
- "lEGS5ECgFxE": 3875894,
- "lEXuBpu8jys": 11589571,
- "lEhf75ma7Ww": 904167,
- "lF-7leHMUbw": 35035240,
- "lFQ4kMcODzU": 3676916,
- "lG6NWLxDbNo": 101365833,
- "lGQw-W1PxBE": 9560223,
- "lHarVgx1RkY": 95789905,
- "lHdlHTsXbZg": 7588562,
- "lIJ45KYQOLM": 29864105,
- "lInyN-WD9u4": 34919381,
- "lJX8DxoPRfk": 14304975,
- "lJdb4_Fuxvw": 3065398,
- "lJvXorny8xw": 88127877,
- "lKq-10ysDb4": 14295392,
- "lM32TL7VnOw": 84144791,
- "lMfJSBsng3Y": 671213,
- "lNE8jSL7WQk": 10655977,
- "lOIP_Z_-0Hs": 70296509,
- "lP1DGtZ8Wys": 6095964,
- "lP3yTE_Ket8": 6743163,
- "lPWfIq5DzqI": 18003826,
- "lQ-dvt3V4yQ": 4613720,
- "lQIVIYCZ4ec": 34376368,
- "lQn7fksaDq0": 6080670,
- "lR0kyOdT86E": 50134936,
- "lR8yK_aKb2Q": 54691437,
- "lRHq7sMRWpU": 28209164,
- "lRJd56BCidg": 25737142,
- "lR_kUUPL8YY": 3827854,
- "lSV-J1JHDFY": 20408369,
- "lSgL0eVtj8g": 14127114,
- "lSoaMCNKfAg": 10678610,
- "lSwsAFgWqR8": 3413301,
- "lUD7ti47IQc": 16513126,
- "lV3LBiivTxw": 22745026,
- "lVacrVMmJX8": 24995573,
- "lVadjWOjvV8": 12642795,
- "lWDtFHDVqqk": 8367009,
- "lXfzq27fGvU": 13019062,
- "lXrocy30OSA": 28106678,
- "lYLaaMObgkw": 3627199,
- "lZSi0xifXwc": 11115793,
- "lZfXc4nHooo": 2992862,
- "l_EM39_z7AQ": 2452927,
- "l_Qj6aC6RV8": 2207571,
- "l_e1jq_I3sY": 32210048,
- "laBUtu_QEEE": 21837620,
- "lc5XDJIgz1s": 17351707,
- "lcgNtRCnbug": 10206182,
- "ld8kHvz1yN4": 69621229,
- "ldqb2Snn-6s": 10424154,
- "leDYnoNSvD4": 4347537,
- "leudxqivIJI": 8418297,
- "lf4BBZK1Vzs": 6272366,
- "lfIHzumEghQ": 68628821,
- "lfRt0Y7e5Ow": 156172785,
- "lfZGtjSWcQs": 2901397,
- "lfeXuK8pbFw": 33099271,
- "lhLVC1QB_kQ": 4449950,
- "lhRfE13mM70": 13903568,
- "liRNTieIU_k": 3902431,
- "ljROszF_rqs": 5165452,
- "lj_gLquca7Q": 30680742,
- "ljmwlMTH5Tk": 29978466,
- "ljzn4SADuZc": 4436989,
- "lkP-E2LUnjA": 5393895,
- "lkeXaqoXDYQ": 148179277,
- "lmhiibdwznQ": 35835779,
- "lmiXf-jilGE": 26142529,
- "lmm767eIsGU": 4499994,
- "ln9VIRiocps": 27042137,
- "lnJRkY0mZh4": 23455670,
- "lnf5ywUA2Y4": 29231533,
- "lng4ZgConCM": 15782882,
- "loAA3TCNAvU": 4884675,
- "lohMwoq3WFA": 1944245,
- "lpSuBiiDjic": 14727348,
- "lpVCcQtZ9FI": 336420094,
- "lpXCvX6ZenM": 8634609,
- "lq-2gX3NKCM": 3237245,
- "lqUEWp-D3IM": 150329454,
- "lqv9dXXjfWE": 7500394,
- "lrIUaN_UKYs": 261685680,
- "lrMVA8F-fiY": 65392149,
- "lsHq5aqz4uQ": 18713956,
- "lsXcKgjg8Hs": 10408855,
- "lsn16U5DWD4": 6110962,
- "lsvqJfvWRfs": 12984682,
- "lt3nPxVTC5M": 17742668,
- "ltdN7LnWJPY": 19079978,
- "lvAYFUIEpFI": 14084499,
- "lxSRKg5ytZo": 6150065,
- "lxjmR4pYIVU": 3870244,
- "lzWUG4H5QBo": 33200896,
- "m-pRnFIeoNA": 711532,
- "m0SFJt_0v28": 4841234,
- "m0T2miip8jo": 8832973,
- "m1DOnLhVuX4": 35245853,
- "m1ZTnl4CNQg": 3835401,
- "m28RAgUySGQ": 13315581,
- "m2DBfaL7Zo4": 361741530,
- "m2ayMP7UbEM": 142816497,
- "m3t3mfahh_4": 17730546,
- "m44llkkWI0g": 9963312,
- "m4mrd7sHCPM": 3561650,
- "m4raOIxsbaU": 108364114,
- "m5OxVgH-T1I": 50344769,
- "m5Tf6vgoJtQ": 8265684,
- "m5xu4r0szaA": 17618359,
- "m6c6dlmUT1c": 9562968,
- "m6lMGoZTJnc": 6472349,
- "m6oMgtGsAa4": 15445207,
- "m6xURMj2ztk": 3972100,
- "m74bMrxhBkw": 72335977,
- "m7c4-EO7ECE": 11624684,
- "m7qXvQvWlY4": 6409059,
- "m8yC7kR5Fuk": 4548421,
- "m9b_h7TiRR8": 16206417,
- "m9h7Vt8ZjqE": 791964904,
- "mA-rgIPVh7A": 24461953,
- "mAT8MLB3XpA": 13842470,
- "mBMAMIFw9n4": 52116963,
- "mCKeogDioWE": 56364533,
- "mDmRYfma9C0": 5525706,
- "mDttV5UmJ1Q": 23659866,
- "mFJ9tHJA2Sw": 161279206,
- "mFftY8Y_pyY": 3583431,
- "mGF7_nqgRpU": 19338333,
- "mG_BZ8GgqJU": 9471152,
- "mGxomKWfJXs": 22394921,
- "mI84WDfhuYA": 3207145,
- "mIStB5X4U8M": 6134729,
- "mIx2Oj5y9Q8": 10179153,
- "mJ1P4A-KA8k": 1434642,
- "mJt1QI-yDG4": 8726906,
- "mK9y-sPn_AY": 48168039,
- "mKsKU0BAiRM": 3550768,
- "mKu0L46Qed4": 4041031,
- "mLE-SlOZToc": 10789657,
- "mLOj11nMxDk": 6092190,
- "mLRYCaYVWFc": 14406299,
- "mLi7BhMj8TA": 92576470,
- "mMCcBsSAlF4": 34090987,
- "mMHOM2qaRaE": 9983647,
- "mMzbr5rm4j8": 18390101,
- "mN5IvS96wNk": 57291333,
- "mNXBfz1iVzc": 35575917,
- "mNgW6SAQLhk": 3007544,
- "mObmS7E75t8": 26494767,
- "mPLCXCscqI8": 17018421,
- "mQh5ku9dyJQ": 11626496,
- "mQyM-4YqHMM": 57887492,
- "mS7t91U9Qqg": 3733113,
- "mSPumIx85l8": 61018925,
- "mSVrqKZDRF4": 5697303,
- "mUfp0KaXSj4": 8272698,
- "mV0RxDZG05A": 2898957,
- "mVFbGjnysP0": 69754583,
- "mVkAvYhgW8c": 104704709,
- "mVlCXkht6hg": 6364652,
- "mX91_3GQqLY": 6102518,
- "mXsFQONwIic": 105684311,
- "mXsn-YYUN4Y": 12399181,
- "mYUE-gH9IyQ": 5960584,
- "mZ-U7Qpkz8Y": 16563004,
- "mbb3msmX2xs": 1935290,
- "mbbk7oehP1Y": 5420555,
- "mbc3_e5lWw0": 5639362,
- "mcQQGGShmLs": 8050335,
- "mclGRkSprJY": 1871070,
- "mduivIHoS7Q": 20107951,
- "mec-QpjQMXY": 14335621,
- "meibWcbGqt4": 14014604,
- "mekBhhFWC9c": 7803383,
- "mfRafWtmOcU": 20007949,
- "mfX_yUvwJho": 3446939,
- "mfgCcFXUZRk": 21529438,
- "mgNtPOgFje0": 12277217,
- "mi5cWPjhJ2c": 10204314,
- "mjxCTApdX3Q": 75657493,
- "mk8w3bzEJYU": 7987427,
- "mkyPZjkdU2Q": 9413405,
- "mkyZ45KQYi4": 8393837,
- "mlrOJgyPySw": 12087390,
- "mmljtQHP0dw": 49972917,
- "mmobuVQPAqk": 96432777,
- "mpHMuaVW0DI": 3096712,
- "mqsIJucBn6c": 3820643,
- "mr9Tow8hpCg": 22529920,
- "mt6Nq0dzFjo": 36758588,
- "mtL_plJXv3c": 14299879,
- "mtMNvnm71Z0": 16145919,
- "muC7HMIEYDU": 8082917,
- "muJatqh6wRM": 33756922,
- "muZmOiiukQE": 31818628,
- "muiNDpURT9M": 5860250,
- "muqyereWEh4": 2664450,
- "mv5zucjq60k": 10776748,
- "mvOkMYCygps": 12825166,
- "mvoE6HYzBdY": 1558894,
- "mvye6X_0upA": 8641426,
- "mw-rwhpAQe4": 8274796,
- "mwP5OHJe1ak": 79091694,
- "mwUyaeWxJhA": 35808109,
- "mx2M_ZKXM_c": 8867792,
- "mxVWyzzMOXM": 12829620,
- "mx_JUo_s-Ok": 1247166,
- "mxsYHiDVNlk": 7183792,
- "mykrnTh1tz8": 24317005,
- "mz2eVthmNn4": 50549207,
- "mzLOT6uOfO4": 9131157,
- "mzOBlH32qdk": 7483613,
- "mzQQ9n-eoLs": 3496348,
- "n-S63_goDFg": 26079634,
- "n-ZCEXWdIMg": 30267591,
- "n-arbfLTCtI": 9272103,
- "n-iEqLhGfd4": 4888774,
- "n0DLSIOYBsQ": 4351068,
- "n17q8CBiMtQ": 9395659,
- "n1MbK-Qb7Mk": 7545053,
- "n2HWkDrorRg": 31783943,
- "n2kUpKP18z8": 2886590,
- "n30yILpUitw": 5829173,
- "n34dqyVCXs4": 1699655,
- "n34jx1FIN8M": 6893969,
- "n4EK92CSuBE": 8175705,
- "n5cKWjZqpIE": 9370104,
- "n6xCyzOP900": 7280811,
- "n7dI4n-0xGw": 32256501,
- "n8Ic2Oj-zvA": 1653758,
- "n9C7sMb7MmI": 206424491,
- "n9UvuzI2fq0": 7803360,
- "nA5niH5e31Q": 19158692,
- "nB2ZRHS2RUE": 3885798,
- "nBbgad3BZm4": 162567431,
- "nBw6KvU51BE": 4640847,
- "nDXFgexOM5c": 3737146,
- "nENvd7Zj1Qs": 7489873,
- "nFSMu3bxXVA": 10667583,
- "nFmH5iiPuDY": 1604041,
- "nFsQA2Zvy1o": 3002638,
- "nG7yosFQHP4": 15680738,
- "nGCW5teACC0": 3539625,
- "nGKffdaI4Pg": 32512925,
- "nGjXhxjnlDQ": 13001780,
- "nH2-37rTA8U": 8587668,
- "nITEU4fsqCU": 16067573,
- "nJ-PtF14EFw": 13408934,
- "nJfB32MtqBA": 5772084,
- "nL-NSia0HiA": 10471448,
- "nL6LMX8-bPY": 1795803,
- "nLCNoT79_-o": 9143997,
- "nLY2bzRfQyo": 5575589,
- "nLi5-KKcmY0": 284882973,
- "nM-O8llUdwg": 2067661,
- "nMhJLn5ives": 7420977,
- "nMrJ6nbOQhQ": 7437324,
- "nO5me_5c8dM": 52962210,
- "nONjtiCnbI0": 48723609,
- "nOZTe8jU2g4": 3315720,
- "nOnd3SiYZqM": 9431491,
- "nQ7QSV4JRSs": 6518271,
- "nRPLiTZAry4": 103530763,
- "nRpwdwm06Ic": 44982440,
- "nTco9qQ2elM": 2611923,
- "nUXDltQfqSA": 206743211,
- "nUxbejIJqQ4": 26757084,
- "nV8taxEW8-0": 2182929,
- "nVPrWz8Jfgo": 21801077,
- "nVbgByJNLOo": 16796533,
- "nW0CVmMHovM": 218439206,
- "nW1rxuQft1o": 5149568,
- "nXW0M2Azanc": 17214551,
- "nXgL7C7emDQ": 21954020,
- "nYFuxTXDj90": 21049964,
- "nZ90fsoVvmc": 3670786,
- "nZrxs-U9d8o": 5448705,
- "nZu7IZLhJRI": 15321831,
- "nZui6Ti9ChQ": 23588526,
- "n_4UNkeqk8s": 33317735,
- "n_npNIK1kMc": 6848145,
- "naRUWPvsQbQ": 8578341,
- "naVFTNWVlQU": 3597922,
- "naaRn_COzhU": 92555958,
- "nbFXM_SqBrM": 9445744,
- "ncgAfzRSJrI": 18699638,
- "ncsA3hqNnZE": 24133476,
- "neAFEvNsiqw": 8856670,
- "ngJifVCOmgg": 44468358,
- "ngOC4eUQl8Y": 10214900,
- "nh1R-gyY7es": 7751136,
- "nh3_IGxHA5A": 4433594,
- "nhSSu0Nzs30": 6989171,
- "nhW3Ri4b_V8": 8522296,
- "nh_Ke1NXjsg": 11398547,
- "ni0TL4pXG5w": 6927904,
- "niTxSf60wDs": 22982507,
- "nj3l2PbD8Cw": 757957,
- "njb6xYF0GZ0": 17111611,
- "nkOtOMNS5bQ": 23391911,
- "nlUG4OKN1IY": 27072669,
- "nljJXTzoO-E": 48506908,
- "nm1FMb73dnQ": 39367886,
- "nnl3x1wo25g": 3012480,
- "npUtXLjTnxg": 2996318,
- "nqdDRpUrrdI": 48211559,
- "nrOg85VPQgw": 6685372,
- "nrRJkzXl4a4": 98265594,
- "ntUjJENYiLw": 333911423,
- "ntxMOKXHlfo": 6446632,
- "nu13yQDo4Go": 2242749,
- "nu87kfmwNfU": 7518625,
- "nuNfdHNTv9o": 129329834,
- "nuUkcbAId6o": 38349792,
- "nujMFiByBjg": 13791917,
- "nv2kfBFkv4s": 12180600,
- "nwULacjb78c": 7277117,
- "nxfWL0TR5H4": 3481080,
- "nyZuite17Pc": 11173100,
- "nz5rbvt64kE": 10066736,
- "o-D-8B_5ibU": 4534376,
- "o-ZbdYVGehI": 1761954,
- "o0XKRK3a3cs": 143294352,
- "o0arqcKC7QE": 2843022,
- "o0azgDKAFNI": 8141889,
- "o1IFePaNENQ": 73591204,
- "o1Y0G8Z67iU": 10076598,
- "o31cLUkS23E": 678202,
- "o3Ym-tAtCvc": 12553582,
- "o3y7CzT-LRk": 20283308,
- "o4pbAQgJYjI": 10225831,
- "o4yJF90OR9M": 11498472,
- "o5-T52bh-eQ": 3248003,
- "o52BW3B4efc": 14661847,
- "o5QRdHH8aeQ": 6536859,
- "o5iot_ZsoV0": 4712100,
- "o6KlpIWhbcw": 49183079,
- "o6W6P8JZW0o": 23330743,
- "o6ooV-19NLY": 59960178,
- "o6oyCeYQWPE": 3849121,
- "o7-i6KLoEkc": 42853698,
- "o8fYEZdTpEE": 2518819,
- "oAOq55MPJpM": 18855811,
- "oBREri10ZHk": 16614608,
- "oC_-oUOEaVM": 7521370,
- "oDPNSPbjzQ8": 178660905,
- "oDigu9YxXUg": 5718969,
- "oEgeUk_Ix2c": 960750,
- "oFGkYA_diDA": 3220263,
- "oG45EoRh3Fo": 187556997,
- "oG7C7U3FhhQ": 216497895,
- "oGAVi4xb7Sg": 12321557,
- "oHLbXTOaw7w": 69038249,
- "oHvLlS_Sc54": 27068175,
- "oIV1zM8qlpk": 3119910,
- "oIZV-ixRTcY": 34494080,
- "oIlMsYOKEsc": 8601796,
- "oIrnecBfHzg": 7262822,
- "oIz6VyZew6w": 16760425,
- "oKRly5xc0_g": 41701274,
- "oKpsU7sVwjc": 58172550,
- "oLh_sIESQnY": 1452942,
- "oLhohwfwf_U": 12074063,
- "oMNaQjtXSGc": 7754703,
- "oMWTMj78cwc": 9601053,
- "oNgo9bbDi7Q": 5466235,
- "oOIqk5hXBt4": 28573461,
- "oOkNS-vvnhQ": 16650352,
- "oPTRwYdOEAM": 11436397,
- "oPqq3Ex6viM": 9163041,
- "oQARhCty-tw": 31674940,
- "oQhp3ndj28Y": 5268916,
- "oQpKtm5TtxU": 4112823,
- "oRKxmXwLvUU": 10892956,
- "oRRiTo8sUwk": 28371467,
- "oT4F_reQXAU": 28479203,
- "oT9NdKpUwdU": 100267918,
- "oTIu12zqf04": 26361201,
- "oTKVXJ7TcbA": 1859839,
- "oTbvYGH_Hiw": 20869118,
- "oUgDaEwMbiU": 3607754,
- "oXowkdgJPO4": 14915406,
- "oYUzKAfrx0w": 25933707,
- "oYoQpDtBLac": 4019290,
- "oYyh9gPUyCA": 36738143,
- "o_Bb43LApog": 8041740,
- "o_Vt7J08PE4": 1329681,
- "o_eNoF1DnZs": 9288532,
- "o_puKe_lTKk": 7860558,
- "o_vMb655dFk": 3898676,
- "oa1SEjP9KAQ": 2878332,
- "oaJ01Ex7DLw": 15193647,
- "oahoaGC8Jfc": 76442311,
- "oajrmwCALmc": 4106256,
- "oapNz_NNGh4": 3910470,
- "ob5U8zPbAX4": 6040475,
- "obZzOq_wSCg": 11267131,
- "obeGVTOZyfE": 9530056,
- "obmqVC07vRs": 54739228,
- "obts_JDS6_Q": 9530448,
- "oc9fJCAIRJs": 8973132,
- "ocINfFUHQT0": 35855355,
- "odZrzqgOruE": 50719129,
- "odpzXKZDTt0": 43800138,
- "oeyBfrx5RJY": 7207022,
- "oeyCaB_sj-0": 4281088,
- "ofJS_K0Fj2Q": 11719976,
- "ofY2qheso68": 58270210,
- "og-yMw3DLgE": 27746750,
- "og9baLjHRH4": 269253106,
- "ogEddosP1G8": 29770516,
- "ogg_ZxSeNQ0": 4828638,
- "ogrRKL30iJ8": 95567497,
- "ohxQKCbCfow": 13964119,
- "oiDvNs15tkE": 18758254,
- "oipQBY7F4YY": 264314728,
- "oj8Lkb-61BI": 5940670,
- "ojFuf9RYmzI": 8394975,
- "okXVhDMuGFg": 14492738,
- "okjt-OZY1JU": 7906875,
- "okxU0GB2eCM": 158743248,
- "omFelSZvaJc": 5792557,
- "omMfj_wNNOw": 220318605,
- "omvNINaRdxg": 7529085,
- "omy9xziXIEI": 32964001,
- "ondmopWLiEg": 19193524,
- "onmNaDrxwmo": 7931990,
- "ons-gYLeNjU": 7334954,
- "oosYQHq2hwE": 5434139,
- "opEy6iN9kqc": 7988731,
- "oqAYqT70EBQ": 2089553,
- "oqAgaGeBOAU": 2116209,
- "oqBHBO8cqLI": 8568587,
- "oqCfqIcbE10": 3950055,
- "oqI4skjr6lQ": 11436140,
- "orI2m6IarJg": 20270973,
- "ory05j2jgBM": 2964374,
- "osIFa9zcI-w": 14377151,
- "otstXFxMkl4": 18416108,
- "otzNXFPg1j0": 36477229,
- "ou3a7Htbrvw": 14981622,
- "ou9YMWlJgkE": 9306752,
- "ouAFk0Jy6TY": 3406790,
- "oug9h9-komI": 8807650,
- "ourH3ueWNmA": 1799653,
- "outcfkh69U0": 17691063,
- "ovOKjwLE4qA": 37522150,
- "owKAHXf1y1A": 19200178,
- "owcmu4XxrHM": 2365325,
- "oxNILgEbXP8": 10817456,
- "oxSzkIftog8": 3734281,
- "oxbSM2IwIBo": 21232175,
- "oxf0LMJTklg": 5872595,
- "oxpr5dhqqyw": 67413938,
- "oy8Kvt1vOto": 33736268,
- "oyPNjYlboaw": 1973391,
- "ozHYnzvzoIc": 6338768,
- "ozKd1cBfTTg": 77293900,
- "p-cZzHxVoG8": 61203427,
- "p0jCw2sqZgs": 4333214,
- "p13IEJ_V_U0": 310578502,
- "p1KkXA0vKsQ": 35941133,
- "p34OOHjoyH4": 18801198,
- "p3KlgxYhDbk": 27570968,
- "p3MPAgnbMk8": 9817262,
- "p3fdeXgErns": 1694170,
- "p4559dZIFco": 23292569,
- "p4DTormtEG0": 12282181,
- "p4M2q1t_Up8": 6408990,
- "p5L8JFxKrRM": 90012198,
- "p5RIcbLBTQQ": 14837942,
- "p5e5mf_G3FI": 2155308,
- "p5nej7Gy7kQ": 37547406,
- "p5nomPfUF9k": 1921801,
- "p6Ovm_jaeKg": 220987245,
- "p729tFmpOXg": 3228199,
- "p7Fsb21B2Xg": 48091171,
- "p7ycTWq6BFk": 12560274,
- "p8PSIpMkEvA": 9134268,
- "p8Vasl3L5p8": 92991397,
- "p8vIcmr_Pqo": 17337565,
- "p9B4s0N5yk8": 13117977,
- "p9NzhA3E-70": 36521119,
- "pADnoU7FWLg": 4467026,
- "pANZpI9sOYg": 9236888,
- "pAgPfr7MkkU": 6895608,
- "pAjluTxSYgY": 20147707,
- "pB9HZsAFXpw": 20008660,
- "pBZ-RiT5nEE": 6694655,
- "pCGnyaa5E5g": 38553252,
- "pD2-H15ucNE": 2022909,
- "pDZIvyeqX1o": 4789648,
- "pEsebLFxqXI": 32585468,
- "pFFoAGIEyJc": 2344283,
- "pFNwgwqSWDo": 17646547,
- "pGaDcOMdw48": 7610628,
- "pGhBfkBqok0": 9141210,
- "pIDmePznLBo": 27181775,
- "pILGRZ0nT4o": 14114576,
- "pInFesXIfg8": 6265518,
- "pJ8KwRztfF0": 11023679,
- "pJzmiywagfY": 16743199,
- "pKvo0XWZtjo": 16178955,
- "pLCmwHsDYqo": 5415728,
- "pLW8x4XsszY": 98192273,
- "pLba3OzsfDU": 14800618,
- "pMFv6liWK4M": 30016326,
- "pMMRE4Q2FGk": 15900956,
- "pMZSDCm9tko": 796266,
- "pMoA65Dj-zk": 5464561,
- "pNBxj5ad8G4": 1961522,
- "pP-QbnWbg_0": 76967790,
- "pPM72fPwIjw": 2252002,
- "pPnxPrhf6Ww": 9167722,
- "pPqPj8CAPvI": 7527651,
- "pPsqUFuysbU": 16610745,
- "pQJrTf_x7Wk": 120424192,
- "pQWwP7YYH6o": 19730765,
- "pQu1RMIkg3c": 21115019,
- "pQwoBOpVoWw": 14334245,
- "pRIELoITIHI": 22127384,
- "pSSqUF_mmtM": 8019016,
- "pT6tFia8eaY": 19666290,
- "pVWQm-GYK_Y": 4522236,
- "pWM5ONbMPeE": 18039442,
- "pWSq7CGh9tg": 3309284,
- "pWtt0AvU0KA": 18416063,
- "pXFHtwVQxqk": 19659654,
- "pXWPtZVFk9k": 1747183,
- "pXo0bG4iAyg": 9796451,
- "pYaIjA4CsKo": 5589479,
- "pZ6mMVEE89g": 7607062,
- "pZIaUx3UQoA": 10586400,
- "pZOUV_rTyj0": 175810824,
- "pZ_2bATPi2I": 9487330,
- "pZcNmGtp5SA": 10591579,
- "p_61XhXdlxI": 1487024,
- "pa92UdJCaos": 24122816,
- "paQ10POrZh8": 199559054,
- "paRbGKaVLZc": 28909127,
- "pb-wsUpPuI8": 13681474,
- "pb6-DcMEYq4": 59495798,
- "pbLiN8D9gAk": 2037159,
- "pdU1qTky64o": 19135302,
- "pdXcf5ZWHf0": 8192659,
- "pdleRJd9YNY": 4820066,
- "pdqOIg_QYSc": 231273848,
- "pe8Dm_FUpdU": 3887445,
- "peQsBg9P4ms": 13421309,
- "peSLM4XObBE": 19398206,
- "peXbz0frV74": 10546985,
- "pfTTHx9kCHk": 37640625,
- "pfnX-zgXHBM": 40751439,
- "pfzJ-z5Ij48": 7345122,
- "pgfWkaySFGY": 3196126,
- "pi3WWQ0q6Lc": 2648694,
- "piIcRV2dx7E": 3988849,
- "pj1VvscsV0s": 3173336,
- "pjrI91J6jOw": 142391133,
- "pkEiHZAtoro": 6861439,
- "pkGrXzakRFs": 3411530,
- "pm6cCg_Do6k": 91918520,
- "pmHlKhv7C0E": 31234216,
- "pmQuNRHJMw4": 42052179,
- "pmagWO-kQ0M": 12486980,
- "pnBbFIxCIGw": 32464793,
- "pnwrNnZGVEw": 6396883,
- "poGjjX_VNbM": 5153217,
- "podbMDjFNAY": 306954040,
- "polop-89aIA": 10621089,
- "ppBJWf_Wdmc": 9429704,
- "ppIzSaP2jWI": 16266999,
- "ppNmUPTbXtU": 57753059,
- "ppOipR32GOk": 63976802,
- "pr-u4LCFYEY": 10946374,
- "prL5WuhGPLI": 14389881,
- "prLfVucoxpw": 10734024,
- "prWSGbDW3LU": 52901565,
- "prtRr80l7-M": 25775837,
- "psLX080RQR8": 16804015,
- "psyWUUkI-aw": 2321068,
- "puJN5OuzXeY": 9873135,
- "puqe3_HkDZA": 21212852,
- "pvEfyJc4QPA": 66485423,
- "pvyqucC-0NU": 12995388,
- "pwHzN9aV1WY": 151934665,
- "pxX07gUbIQQ": 4091510,
- "pyDPJENZOs0": 151107413,
- "pyEVmWLOePw": 2915554,
- "pzHEtjAUVtY": 5786562,
- "pzQY-9Nmtws": 5094032,
- "pzQnc_0eZA8": 4552279,
- "pzSyOTkAsY4": 15711389,
- "pzqdoXwLBT8": 154198904,
- "q--2WP8wXtk": 18504021,
- "q-3BctoUpHE": 47059647,
- "q0AkvTchhPI": 9398038,
- "q0oSKmC3Mfc": 7516459,
- "q0zlBUbcWWQ": 50831093,
- "q19UnHEofOA": 1708799,
- "q2SYtugUdpI": 11521513,
- "q3N1IqBoKSo": 61039747,
- "q3d7488qjgs": 33029957,
- "q3g3jsmCOEQ": 7199186,
- "q3qvkZxhchE": 1599190,
- "q4nreCdMfRk": 10216080,
- "q5ArmxIXU4s": 19340865,
- "q6FanLhvsEs": 23078563,
- "q71hYD9Xhek": 14844142,
- "q7STpNRwzzc": 22306162,
- "q7eF5Ci944U": 6312958,
- "q7lttowsC0Y": 15552910,
- "q87L9R9v274": 14244499,
- "q8cYGh-K6Ok": 146170412,
- "q8olT3TyHm8": 11061639,
- "q9W0Uqi4Y58": 61868602,
- "q9XCrpLPfGk": 5487923,
- "qBYa_QOWuaE": 7477996,
- "qBfc57x_RSg": 35104956,
- "qBkj-AYYg7w": 31403408,
- "qCdNab2WLiw": 16482251,
- "qCs7HPSDL8A": 17129308,
- "qCvV11R2lgg": 46473447,
- "qD6ct0VS15c": 90488491,
- "qDsLxwmW_Ms": 9219926,
- "qEB6y4DklNY": 7934624,
- "qEdevRBLKVE": 16461617,
- "qF6TBRaE2_A": 248223240,
- "qFFhdLlX220": 3330406,
- "qG3HnRccrQU": 7451088,
- "qGNqyXIQaqQ": 10241611,
- "qGTYSAeLTOE": 6887941,
- "qGbRrM5hWq4": 55332161,
- "qGiPZf7njqY": 38264953,
- "qGmJ4F3b5W8": 3563224,
- "qGowzgZCUXc": 128520784,
- "qH4IQfDD1Nw": 4773318,
- "qHO1xH4ilZs": 8047868,
- "qHU0pQXHU2w": 10957739,
- "qIBqvr5_QqQ": 3560595,
- "qIQmB5mkUgg": 8099496,
- "qJCoXVdPowo": 24861102,
- "qKHw6Sc0XHY": 4199402,
- "qKe9sZQPV-Y": 9911103,
- "qLMsZKx_a8s": 101256593,
- "qLU0X154wlE": 15529029,
- "qMaVLzWnS80": 18329505,
- "qO2cTx6DwCA": 8342826,
- "qOYCeAlukMk": 16023526,
- "qOwCpnQsDLM": 31667974,
- "qPoLL0E2W8A": 9629727,
- "qPx7i1jwXX4": 5595297,
- "qQAhhithHa8": 11291469,
- "qSFY7GKhSRs": 17289134,
- "qSPwUDmpnJ4": 5636271,
- "qSkpZswoZTc": 1966449,
- "qSktOkaW6EA": 3584635,
- "qTGJMnTWrrw": 114053371,
- "qTXZ6UrO54U": 9465256,
- "qThlokfE-yk": 277710470,
- "qUNGPqCPzMg": 13786540,
- "qVPtT8CX1eM": 8943298,
- "qVn_Lfec-Ac": 6041555,
- "qW-Ce44ll0Q": 2442890,
- "qWR7SBsnLwo": 32852081,
- "qWfwRbSrQMU": 6373497,
- "qYD5iwhLzm8": 16551276,
- "qYZF6oIZtfc": 12728477,
- "qYjiVWwefto": 4453491,
- "qZ1ofSJBxBU": 9808775,
- "qZTeyhR1akA": 4313753,
- "q_Q9C1Ooofc": 2401750,
- "qaOC_3KA3P8": 10703757,
- "qaYi3_wFlFM": 8485694,
- "qa_hksAzpSg": 5409873,
- "qasm7Mj7CYg": 14585651,
- "qbCZbP6_j48": 12163443,
- "qbMe4f2yvKs": 1352435,
- "qbXKrR9BQmg": 44096821,
- "qcMJ1pN36r4": 3508492,
- "qcz1Cm_-l50": 5641372,
- "qdFD-0OWBRo": 25845991,
- "qdf2CuMGdKs": 23339747,
- "qel8yujGuZM": 12532444,
- "qfITRYcnP84": 224758638,
- "qfQv8GzyjB4": 5917047,
- "qfqbomqKZqY": 478261438,
- "qfz1k_yU3d4": 77501159,
- "qh10-sfZNJE": 143549750,
- "qhKJ1DG9kYY": 8711380,
- "qihoczo1Ujk": 10311746,
- "qjZnIpZ-EcY": 6196147,
- "qjhlt6G-Azo": 17532522,
- "qk-9Ez3xICY": 21614753,
- "qk69pR91R00": 8501813,
- "qkLzAXUP_K0": 12804022,
- "qkVX03qMzb4": 8015702,
- "qkfODKmZ-x4": 24652438,
- "ql8wVEetJkQ": 55707822,
- "qlWZJ21O63s": 2387216,
- "qmsWOrQtj4w": 5479346,
- "qnKxHDBok4A": 32213165,
- "qo5jU_V6JVo": 3203448,
- "qoHva5i85Qo": 24957460,
- "qpP8D7yQV50": 7617311,
- "qpbaglogObM": 6625802,
- "qpsaHE_uZic": 33717458,
- "qqTGtLZeoCY": 32758324,
- "qrK-FBdjGk4": 11772816,
- "qrU3ghYJjEw": 12256916,
- "qrVvpYt3Vl0": 2086547,
- "qrxvbRA2xCI": 53523947,
- "qs0hRHfnzTQ": 8442039,
- "qsL_5Y8uWPU": 4025694,
- "qtbb4YBJbJM": 19981214,
- "quBogKF8atM": 1719732,
- "qv2K1yk0LCE": 25644230,
- "qv7DM5Ph0vU": 2484947,
- "qvmxbDomk90": 45454606,
- "qvyboGryeA8": 14629075,
- "qwZn852brII": 134364429,
- "qxOEz9aPZNY": 18354698,
- "qyQGBJIYC5s": 221722276,
- "qyUHnh73Sng": 16723642,
- "qyYSQDcSNlY": 7644445,
- "qyu2ubVNJNA": 654033,
- "qyvwN-2PoXA": 7351637,
- "qzsR7cChujg": 2670535,
- "qzvatDIDXwo": 47652624,
- "r0eFSS8CN-Q": 1403431,
- "r1tggaFV0yo": 16289368,
- "r1ywppAJ1xs": 10372121,
- "r2PogGDl8_U": 18216550,
- "r2syXj4Eb6w": 175375854,
- "r3M68V9Joac": 3872670,
- "r3OcrRdExWk": 177478298,
- "r3SEkdtpobo": 7076197,
- "r3ttwvNvors": 111130758,
- "r4bH66vYjss": 29481067,
- "r4rWWtSWf_k": 39793104,
- "r5L-riaIJjI": 8368753,
- "r5l5Cwge7yk": 52648703,
- "r6383ZDXB0Q": 201191269,
- "r6hS_8nm1jM": 1713153,
- "r7gTH_5XfOI": 25481844,
- "r9aTLTN16V4": 4730849,
- "rAof9Ld5sOg": 6976583,
- "rAxbnfKXcoE": 6868422,
- "rBZ63imCC84": 13569602,
- "rBaCDC52NOY": 5982257,
- "rC165FcI4Yg": 8005270,
- "rCGHUXSd15s": 5070682,
- "rCNlG_j_gSM": 12770198,
- "rCnb7vapl5o": 45811637,
- "rD25slnTqAE": 3708295,
- "rDjWrNRKfvg": 8825515,
- "rESzyhPOJ7I": 15808050,
- "rEiLOB4FulY": 7403579,
- "rElAJA9GyL4": 8751940,
- "rEtuPhl6930": 6091489,
- "rFMFH8Nf0Zw": 52880163,
- "rFe-VSf-TQ8": 253674264,
- "rFmAWQSiqRo": 14122875,
- "rGAIHFB9FL0": 21753310,
- "rGaM6pwqhB0": 8743908,
- "rH7AjDMz_dc": 53799680,
- "rHNY01R2VSQ": 9051605,
- "rHonltF77zI": 26191442,
- "rIF6Vj6pVNg": 7609557,
- "rIVCuC-Etc0": 26222970,
- "rK4sXm_MPWo": 5970601,
- "rKoIcgBM4Vg": 9990914,
- "rL0lDESwwv8": 13006055,
- "rLI88bU7Fuo": 7510923,
- "rLIEeUP_e-Y": 10632875,
- "rLIM8iRmsOI": 17166231,
- "rLNM8zI4Q_M": 10231635,
- "rLdoKZ7w0xI": 10538157,
- "rMYdKz4xxMc": 34984063,
- "rMklxFGEClE": 17724906,
- "rNJPNlgmhbk": 7475726,
- "rO_lwjhoSiU": 129980060,
- "rOftmuhGLjY": 7242772,
- "rPLjSY00JlE": 5871963,
- "rPoqpQcgNv4": 19561963,
- "rQSclv1Ah5s": 8867380,
- "rR0LdZ-PfBk": 9946928,
- "rRFphdMIIvI": 92128476,
- "rRTXKQpblEc": 9893982,
- "rRZR3nsiIeA": 190285362,
- "rRjGX8ms01o": 363427983,
- "rSBbnHLR_cg": 72965114,
- "rSadG6EtJmY": 3697925,
- "rTF_WrVSPPQ": 64237745,
- "rTKdqvOZcQ4": 9447855,
- "rTey6h4BQhc": 169535539,
- "rU222pVq520": 2448719,
- "rUT0pa87m7E": 14573684,
- "rVI5Sjm0xKI": 41445613,
- "rVQ3G9epCjw": 10526922,
- "rWfs1hyguaM": 9286930,
- "rYG1D5lUE4I": 5453601,
- "rYjs8Wtfnzo": 65060991,
- "rZYZedhcWGo": 7188235,
- "r_rVyt-ojpY": 69623167,
- "raP1ZWQSXjY": 11145442,
- "rai9hJOGJLE": 3060016,
- "rb2gArLStXs": 185726196,
- "rbWaiXa9A1k": 10473828,
- "rcBaqkGp7CA": 8570661,
- "rcLnMe1ELPA": 45160857,
- "rcLw4BlxaRs": 86165757,
- "rcRg_gO7-7E": 1808771,
- "rccqylTloMs": 2498497,
- "rdaxI6ekLLQ": 10477511,
- "rfZokAnD7QM": 1924782,
- "rfepM3L7Pqc": 13103854,
- "rfm0wQObxjk": 11076691,
- "rfyq32mHcYs": 11972588,
- "rgqFXkLAc-4": 8875875,
- "rgvwd6iFni0": 15161654,
- "rgvysb9emcQ": 12897771,
- "rh-bWfSCmyc": 31098810,
- "rheO1tVyB0U": 16325899,
- "rhuYuerbhIE": 14269822,
- "rhxDfbIjRNk": 783939,
- "rhxsZnrA46s": 6987842,
- "riXcZT2ICjA": 9779343,
- "rkeU8_4nzKo": 10345746,
- "rkntp3_cZl4": 22789578,
- "rm3NjcSmFFo": 10924514,
- "rm4pzNYDHAI": 7113389,
- "rmQeaJ7lu1g": 128631487,
- "rndex9FCIdo": 11280605,
- "roHvNNFXr4k": 4304731,
- "roRIPM3i0ZM": 31268765,
- "roUGDG1rhPI": 11105754,
- "roap32sTgPk": 15472948,
- "rp7T4IItbtM": 9478174,
- "rpI-X9Gn5a4": 11004658,
- "rq55eXGVvis": 91909872,
- "rqubRA14Aww": 40178271,
- "rrAKZWfhzrE": 31746106,
- "rrUW4z5IVcQ": 1794015,
- "rs1md3e4aYU": 6908478,
- "rs6UkVaOPzo": 15637198,
- "rse0I7rZ8jM": 10967179,
- "rtNuo7R3scY": 4628778,
- "rtUoWyIE1FM": 63334305,
- "ruAXk6RnkG8": 8980731,
- "rufFQZDDXCE": 5070888,
- "ruk2a0cBPR0": 148644034,
- "rw3s2C2TIO8": 28375708,
- "rxJRhbS_21c": 41424898,
- "rxMF2RYzlto": 49733141,
- "ry81_iSHt6E": 7209920,
- "ryJvNEHcuDg": 11923091,
- "ryvh7I9rBeg": 35165168,
- "ryycDVWXDvc": 165844293,
- "rzXRZFMcZyU": 31595545,
- "rzkgZWxT4UM": 7366858,
- "s-5_H3z-Cv0": 4174925,
- "s03qez-6JMA": 2908997,
- "s1UQQELPyrc": 9058166,
- "s2ILpsLcUqY": 31181451,
- "s2_NTiISZl4": 18002329,
- "s2wmcnZi6kE": 8658986,
- "s38l6nmTrvM": 6745871,
- "s4JBqLoY3tY": 5714688,
- "s4cLM0l1gd4": 5131053,
- "s5smas8uum4": 41706784,
- "s6NOa1KTCxQ": 5254525,
- "s6UYa2nwaDw": 4920094,
- "s8_14yxp1lQ": 7867720,
- "s91Dptx52GU": 28000379,
- "s9HPNwXd9fk": 18837798,
- "s9PvbFG2yJA": 3199550,
- "s9t7rNhaBp8": 2865130,
- "sBhEi4L91Sg": 8416979,
- "sBldw95xMD4": 6272313,
- "sBuM8hTGlag": 10266978,
- "sBvRJUwXJPo": 2457702,
- "sCHiJVnyo4g": 3391653,
- "sCVyvfOLI6U": 881648,
- "sD123svCFHQ": 20647111,
- "sEiQm7IzUg8": 13296390,
- "sFlH7V7QDbQ": 8731460,
- "sG1ZAdYi13A": 12615020,
- "sGHV5_ieDP4": 20260049,
- "sGYBfCVfl44": 851957,
- "sHbX58y5D4U": 2175776,
- "sHkZWu9tgpw": 33809066,
- "sI789G6FBb4": 4485362,
- "sILo6xYbsc0": 10746016,
- "sJmLjUj_h68": 1922519,
- "sKins25SEVk": 7094289,
- "sLw902V40L0": 6290937,
- "sMA116kzyK4": 10511919,
- "sMOZf4GN3oc": 18396710,
- "sMrm4g6Aj4Y": 7956521,
- "sMyZO9YDlk8": 6023053,
- "sNgsCT0E7Es": 199143864,
- "sO9xwAyeWX0": 31680861,
- "sOXeKd-6bSk": 106981477,
- "sPIOgGHhlYo": 303159120,
- "sPPjk4aXzmQ": 4935576,
- "sPTuCE5zd3s": 4939598,
- "sPz5RrFus1Q": 18952144,
- "sQYpUJV8foY": 8322199,
- "sQfsql8BPy0": 1614829,
- "sQk6t-9mQjE": 89505093,
- "sQpAYcxSVEg": 10289197,
- "sRBoFWByrJs": 168248529,
- "sRVGcYGjUk8": 10086869,
- "sSE6_fK3mu0": 3412592,
- "sSWQ1Sx7vw8": 148667297,
- "sSqxVMbml_k": 3730614,
- "sSyPAAyL8nQ": 6608032,
- "sTLsPHluQdM": 14445915,
- "sTcqtljxLOk": 7212065,
- "sTp4cI9VyCU": 14577516,
- "sTw0e-hwYAQ": 6968406,
- "sU5MCM3npXU": 23601142,
- "sWfz6s__os0": 34199384,
- "sX97LcDpgzo": 10645547,
- "sXOIIEZh6qg": 8280218,
- "sXP7VhU1gYE": 3454096,
- "sYQ5CSyACpc": 9336357,
- "sZG-zHkGR4U": 28788761,
- "sZMezOCZr40": 3883973,
- "sZRkERfzzn4": 9628515,
- "sZWP9b6u_5o": 3514902,
- "s_iwrt7D5OA": 307537119,
- "s_w3EJ2Jzw0": 7129316,
- "saHVVgvRX1Q": 10842135,
- "sazsDYOXVis": 203906258,
- "scN-1B6plos": 5962088,
- "scgd0gh6BFs": 5083109,
- "sd0BOnN6aNY": 28165761,
- "sdM6aGhKdTI": 81015259,
- "sdpxddDzXfE": 33005663,
- "sg7drNK_vZ0": 39505252,
- "sjMsyk-rP8I": 16851019,
- "sjUhr0HkLUg": 6367715,
- "skAptImhx1Y": 18386651,
- "slIX9EDcHgE": 2746148,
- "slP8XZ6Nq40": 12028627,
- "slm6D2VEXYs": 30951089,
- "smh3WblMpeY": 6734069,
- "smo4OR3Gvq8": 52036441,
- "smtrrefmC40": 22771652,
- "smuhAjyRbw0": 53771751,
- "snX4Wf7PGts": 2658466,
- "snw0BrCBQYQ": 12225871,
- "soIt2TwV6Xk": 4469622,
- "soUmhhuF08Y": 1343582,
- "sorB6XFJ8Jc": 25500038,
- "sqG9r4rSwFA": 65378447,
- "sqnrJMTp9dc": 19473216,
- "ss7Ap-6bFYw": 10100961,
- "ssY1dFl7d30": 857613,
- "ssz6TElXEOM": 1624871,
- "st6D5OdFV9M": 11508898,
- "stSvcwY0RWI": 12064942,
- "stYBg9zqgLs": 17227335,
- "st_gQzP4QxY": 262343187,
- "stfSnPaaK04": 2459769,
- "suIUUGdNyWk": 62550345,
- "sv9CHsd546Q": 18137050,
- "sw2p2tUIFpc": 21451515,
- "swFohliPgmQ": 2921410,
- "swQgTqphZzE": 7465830,
- "sxbPwl_KRuA": 9687521,
- "sxnX5_LbBDU": 82422013,
- "sy132cgqaiU": 7463593,
- "sy3_PGIuiXs": 18310719,
- "sy9GogcnnwY": 11969475,
- "sz4DpNzB5Wo": 25477015,
- "sz_HYdpOuhY": 30395252,
- "t-4O17cw9cw": 78818022,
- "t1-VVUmP0rY": 15624911,
- "t2AeULH_Ijw": 2550440,
- "t3MxJEbJN3k": 10004034,
- "t3cJYNdQLYg": 17224947,
- "t4jDcc8IIBM": 11926384,
- "t4lgvB5cV5E": 153266793,
- "t4oSyhr37xc": 12660589,
- "t4xOkpP8FgE": 5311308,
- "t4zfiBw0hwM": 6944523,
- "t5ry2rasWvI": 6948010,
- "t6npEWNrHGM": 91940798,
- "t6qlbcdn_6k": 7712595,
- "t7NvlTgMsO8": 5178461,
- "t7OkENcBrxs": 8883721,
- "t8m0NalQtEk": 8486264,
- "t8nLkge34mE": 456158447,
- "t96N4zaP-s8": 1664237,
- "t9_lemSlr1o": 87359254,
- "tB4lr5Qh3DI": 36322250,
- "tBGebJ2IiFE": 146021512,
- "tBRW-CyJE6k": 944207,
- "tC1SfxRvtmM": 1005073,
- "tCV9VyIIaw0": 7004151,
- "tDGVAyx-_xQ": 55150300,
- "tDdtAF3WtIY": 32039876,
- "tDi9BD__gRY": 5769676,
- "tEHF3JB2ZqE": 234020122,
- "tFUf4l8opwc": 10584583,
- "tFhBAeZVTMw": 4049783,
- "tG8JvkYsfyE": 247439442,
- "tGOjNzOQZek": 37149443,
- "tHYis-DP0oU": 1976063,
- "tIqO2GS8O64": 129341277,
- "tJBQZ3PUkPo": 5381426,
- "tJW_a6JeXD8": 17188054,
- "tJrSILRXOUc": 1169812,
- "tKDET9t8VTI": 29932845,
- "tLBLn6taNI4": 20066733,
- "tLQURiMoLcA": 1923500,
- "tNZrKDq9Iqc": 4469495,
- "tOEz6RC0aVo": 22068964,
- "tOUys6vlTvE": 12739090,
- "tOVJgYHj6kc": 9481665,
- "tOX3RkH2guE": 7626889,
- "tOd2T72eJME": 835066,
- "tOuCdKqO6-s": 11723368,
- "tPfYrmcfvYE": 20550960,
- "tPhcRBkVmUM": 16437612,
- "tQcB9BLUoVI": 6900316,
- "tR-hzV5Tkxo": 10980047,
- "tRC0HZyNCW4": 29630738,
- "tRHLEWSUjrQ": 2784428,
- "tRuvXP-H164": 21185271,
- "tS2YJPmKOFQ": 12798122,
- "tSHitjFIjd8": 7470799,
- "tSMuKcN-RKM": 15213628,
- "tSNtCg7o7bA": 8140967,
- "tTF5ZY6aitg": 73020223,
- "tUOKkeEOkXk": 86033215,
- "tUdc4bD2OZU": 19592754,
- "tUqyJgmGY7k": 4537335,
- "tUvpwdqdLlI": 21169355,
- "tV8cMNYi4q4": 2303931,
- "tVDslyeLefU": 3555974,
- "tVNRn4srPUI": 7170977,
- "tVcasOt55Lc": 3860884,
- "tVdLRnB6if8": 31331577,
- "tVdw60eCnJI": 53579349,
- "tWDflkBZC6U": 380671160,
- "tXlcE_K_C-Y": 9909348,
- "tYmMEqro8D4": 9154822,
- "tZKzaF28sOk": 6013087,
- "tZQJgqBcyw4": 101086239,
- "t_EgAi574sM": 9455984,
- "t__jNTOwePU": 46853653,
- "t_f8bB1kf6M": 29471363,
- "taTxFgtb1_Q": 47169318,
- "tbL-SRTtgq0": 5151343,
- "tbQ_7zvRoN4": 12057305,
- "tcm-v12m7hU": 12605448,
- "tdEF5cQzWms": 100664466,
- "tdp22elrY7s": 82626357,
- "tdwFdzVqito": 19187383,
- "te4AkzFprbI": 12533899,
- "tedzsRH0Jas": 6677706,
- "tf4C8x8e7HQ": 8431858,
- "tfjQVtOyoaQ": 5707539,
- "th06SCNNZ60": 19900364,
- "thvh5PdR6yM": 26211308,
- "tixLZtDnbTg": 8850078,
- "tj9oLZYA-AQ": 4751373,
- "tjGGxA7AF9E": 18666760,
- "tjQzJ7GY0GY": 2694683,
- "tk-SNvCPLCE": 6017726,
- "tkG960qqMlE": 55823378,
- "tkJZCP-FMPE": 958453,
- "tmpa8Q240XY": 2248553,
- "tn53EdOr6Rw": 1628521,
- "tnkPY4UqJ44": 2812242,
- "tnoPnyvVjyc": 5460283,
- "toKu2-qzJeM": 169707415,
- "tp4I9J5viS4": 16149408,
- "tp_qdvgXtVc": 15449330,
- "tpjVmLIUWCo": 22519249,
- "tqTJZEglrvc": 3613653,
- "tqfU9mC2yFU": 7206450,
- "tqqVOWm9YsU": 11712486,
- "trRl8QXtdMI": 11609883,
- "trdbaV4TaAo": 20950618,
- "trgXI-RCFJk": 6995661,
- "tu1GPtfsQ7M": 16967379,
- "tu5mKn3_h7Y": 210377069,
- "tuVd355R-OQ": 14131185,
- "tvO0358YUYM": 8510508,
- "tvXRaZbIjO8": 1320045,
- "tvj42WdKlH4": 4107982,
- "tvnOWIoeeaU": 1316631,
- "tvpp2lAD9iY": 119082361,
- "twMdew4Zs8Q": 2175496,
- "twT-WZChfZ8": 7118304,
- "twhqVIokAQc": 4917716,
- "tx2Niw7aJJ8": 1464763,
- "txHg9ItLH3Y": 27182376,
- "ty4Ohya4hdE": 1867726,
- "tyVCA_8MUV4": 15111700,
- "tygZ2A8rytQ": 49804591,
- "tzQ7arA917E": 6639805,
- "tzR9jUCSniQ": 10507211,
- "tzqMoOk9NWc": 19190507,
- "tzqZsPjHFVQ": 261927947,
- "u-4BXU--G9s": 101848526,
- "u-jigaMJT10": 42005750,
- "u00I3MCrspU": 2602913,
- "u1HhUB3NP8g": 15121434,
- "u1R4CFUxj9c": 68554259,
- "u1SAo2GiX8A": 3051399,
- "u1UKIljUWuc": 7613257,
- "u1eGSL6J6Fo": 16839345,
- "u2hLYcmI5y4": 5220779,
- "u4-HYwo0Gsc": 17290410,
- "u4m5mGw4PaM": 29840443,
- "u5NCRHcel_g": 116032141,
- "u5dPUHjagSI": 3203812,
- "u5vM4rtUSQg": 159926057,
- "u6O0YHyarlI": 9897160,
- "u6gpw_Deth8": 28424423,
- "u6zDpUL5RkU": 8840399,
- "u7dhn-hBHzQ": 10536465,
- "u84TMEdR6C4": 88861056,
- "u8JFdwmBvvQ": 1922093,
- "u9B-dV6r6rU": 1406389,
- "u9v_bakOIcU": 4516344,
- "uA3m8vbd2wc": 7932107,
- "uA6mcx4FMN8": 11404516,
- "uA7Xny276sk": 42807481,
- "uBVhtGL9y88": 10239556,
- "uC09taczvOo": 1449151,
- "uCBm8iDyg1s": 3424887,
- "uCtXyhepAmQ": 2637334,
- "uD7nKhiLB40": 21909485,
- "uDuzy-t7GDA": 75889920,
- "uEhRqiSA4ko": 35156034,
- "uFZvWYPfOmw": 5540910,
- "uFiyXC_x2U0": 19371370,
- "uG2VpBYd-Hk": 8346485,
- "uGDk23Q0S9E": 40351838,
- "uGjR338bHPs": 18878025,
- "uGpLS_pr7oc": 10048354,
- "uHaKyNplino": 4476441,
- "uIojjqSm0m4": 48769701,
- "uK3M7RGqJFQ": 5337139,
- "uKHVFI2uCOU": 39709205,
- "uKu566g3j7g": 12421701,
- "uL3grek6D54": 40882941,
- "uLjvEsHi_qU": 27139506,
- "uMqM0I5ojs0": 14376679,
- "uQTG0x4qaYs": 64769161,
- "uQs100shv-A": 924385,
- "uR5ZWegnTvA": 3934745,
- "uSywjCBfSO8": 221668678,
- "uTlh861MtYk": 5564485,
- "uUH5YI5dTOg": 25751933,
- "uUhBEufepWk": 5667444,
- "uUxOGQ4VFWQ": 703552,
- "uVFqEi5j1v0": 24135559,
- "uVQXZudZd5s": 4178454,
- "uVWquWFjnCw": 8861110,
- "uWJRx-5n1yw": 14523045,
- "uWbZlJURkfA": 7937744,
- "uX1RzoE_9BI": 15579056,
- "uX2w0b8Qlss": 4347418,
- "uXTRmzXlorI": 3736135,
- "uXZ_P_LOKPQ": 3539801,
- "uXdIdIjllEI": 6129841,
- "uXjQ8yc9Pdg": 16422549,
- "uXoh6vi6J5U": 42017085,
- "uY2ZOsCnXIA": 23652946,
- "uYXhga17q1g": 14137257,
- "uZYLN_Ouu5U": 137059055,
- "u_WqMXmCi7c": 6442156,
- "uaPm3Tpuxbc": 1366669,
- "uaXgGL1dGfU": 19146788,
- "ualmyZiPs9w": 14921073,
- "ubEadhXWwV4": 37236133,
- "ubXjr_dQ-y0": 19488325,
- "uc2xgyjxKHg": 96089167,
- "ucAUriWEFo8": 3979866,
- "ucbxYIVztz8": 12916323,
- "ucghWyc2_qs": 6783159,
- "ucqaqTR6EK8": 9939293,
- "udG9KhNMKJw": 4443577,
- "udbZ-jPasGs": 22686799,
- "udgMh3Y-dTk": 19407276,
- "udgNvPpDb2I": 105498983,
- "ufymsKi9S3U": 15663748,
- "ufzlgOyWBHE": 16441577,
- "ug2FXcEurOo": 2727011,
- "uglmkcGWmx4": 2333167,
- "uhXLW4bU-pI": 17528505,
- "uhqIh7wXwS4": 31024717,
- "uhxtUt_-GyM": 8827770,
- "ujYRgDi3Lz8": 18121468,
- "uk7gS3cZVp4": 2532785,
- "ukPjc3Oyad4": 12395500,
- "ukdkumw8cqc": 9812109,
- "ukjw0Doy65Q": 5784084,
- "ulHnX0DG8_U": 30407538,
- "ulxyWZf7BWc": 25200909,
- "ulyyusmpc9w": 3441239,
- "um2nlNVM_YM": 12774768,
- "um6_5re9XU0": 6392022,
- "umoSO56Nwa8": 156109224,
- "umvNQj-zmq4": 14379762,
- "un5wOmL3LBQ": 12437334,
- "unNvQXIU1q8": 19986762,
- "unSBFwK881s": 6619606,
- "uo5a6Kxf1rA": 13383846,
- "upO6Mh862PI": 6031675,
- "uqyLOuAzbvo": 7988891,
- "urQeIjx7Ibo": 136791958,
- "usH9VUi2-Xg": 5887718,
- "usnv1_xRCvs": 18667743,
- "ut1zmfolM9E": 8148831,
- "utQi1ZhF__Q": 6368027,
- "utdhIMzR6XM": 2900497,
- "utmUAjvl4kc": 4099815,
- "uuDQkhx6TAI": 31733644,
- "uucYGK_Ymp0": 74745869,
- "uv21jrzg2z4": 99025464,
- "uvA6YY4yHtM": 116239072,
- "uvgBSJPiQ8Y": 129180658,
- "uvgru6FcyxU": 14790911,
- "uvmz5E75ZIA": 29698755,
- "uwDHi2KNM4s": 18438471,
- "uwMYpTYsNZM": 28031392,
- "uxoAJHlgcF4": 47109398,
- "uzOXGgAgmPs": 19454719,
- "uzkc-qNVoOk": 6268405,
- "uzmLXIuAspQ": 48359062,
- "uzvopM4PZLw": 5356348,
- "uzyd_mIJaoc": 3346207,
- "v-4QScXlN0o": 11321973,
- "v-Drg73XrS4": 4446051,
- "v-H_7o7EMoU": 7499099,
- "v-k5L0BPOmc": 5272133,
- "v-pyuaThp-c": 94421365,
- "v10IbP9oDUU": 20211750,
- "v13fraCiLEg": 12368987,
- "v1_pCZBVWuY": 42589100,
- "v2Tz76UkTkY": 82905357,
- "v2V4zMx33Mc": 21410637,
- "v3gdX07Q6qE": 45777361,
- "v4Fq9LEspzw": 15879673,
- "v4MenooI1J0": 2015049,
- "v5Oz9kVptCY": 998158,
- "v5SAMuRanGM": 13625982,
- "v5YT8GlSxoU": 4878704,
- "v6-Ijv3wOAM": 10990522,
- "v62741EasZs": 896384,
- "v6L8--MlnKo": 6566610,
- "v7ZWTZ9NgU4": 11708051,
- "v8ODIMqbQ44": 10768212,
- "v8PPsI0LqOY": 60295108,
- "v8WMx_TmEyQ": 319874351,
- "v8plb6V8BQo": 13950855,
- "v9Evg2tBdRk": 8788889,
- "v9NLtiVt3XY": 2015794,
- "vA-55wZtLeE": 12334705,
- "vAW9t5uBr08": 11326260,
- "vAYoAH98Gag": 5449858,
- "vAepSNDLZRM": 4293529,
- "vAlazPPFlyY": 3841683,
- "vAtQB9wLkUA": 81617154,
- "vBlR2xNAGmo": 7578720,
- "vC-cEWJxDRY": 16384063,
- "vCAFlt4pQSQ": 6315032,
- "vD1OROM3Lfo": 8241777,
- "vD2WJTIEVv0": 8812880,
- "vDaIKB19TvY": 3299034,
- "vDjI3bVAN_Y": 8388995,
- "vDqOoI-4Z6M": 4846301,
- "vDwzmJpI4io": 603577826,
- "vEZea0EThus": 2993868,
- "vFctYRhK2M0": 11691179,
- "vFfriC55fFw": 11160424,
- "vIE8aYYsw8M": 1250893,
- "vIZ0LnLo3jE": 5888007,
- "vItRHYu-A88": 6157794,
- "vJdqX2EQML4": 24421148,
- "vJyvTChDzeg": 729936,
- "vKMNRcctwL4": 17581469,
- "vKRMWewGE9A": 14224276,
- "vKfkOF2sJSg": 54648458,
- "vMTe6qXUHVs": 12164699,
- "vN0aL-_vIKM": 2840312,
- "vN7O7zsRKb8": 21411590,
- "vNbgztA5WVc": 182953515,
- "vO1Ur38PGCY": 6121690,
- "vO63j9m5grE": 8658695,
- "vOPuAPCioE4": 23448808,
- "vOVPusp5-tg": 2677399,
- "vOq6cwT-l2U": 24752506,
- "vP23dkY0mPo": 3988010,
- "vPkkCOlGND4": 4465087,
- "vQLcxlvK7Ik": 11858976,
- "vQW94GVN524": 30041945,
- "vQnG0fyEr_w": 50196809,
- "vR9jFC6wwYo": 26846380,
- "vRa6XxykfbY": 3416237,
- "vSijVSL3ChU": 11194330,
- "vSiu8qzHV6c": 44814060,
- "vSsK7Rfa3yA": 7772790,
- "vStLGBTKMBQ": 44447128,
- "vTYxY4IpmF8": 10756522,
- "vUOiOi-XaoQ": 14039539,
- "vUxYPrznFLw": 54015073,
- "vVXbgbMp0oY": 6152488,
- "vWXMDIazHjA": 6368242,
- "vWsmp4o-qVg": 174969538,
- "vXESvgGbSiw": 19251774,
- "vXb0ZvkFkS8": 21332717,
- "vYKhS35m5Fs": 12711572,
- "vYnreB1duro": 17482797,
- "vZ9vwiGHXgY": 11590426,
- "vZOk8NnjILg": 7163819,
- "vZtQXteAE-w": 63704165,
- "v_OfFmMRvOc": 4178766,
- "vaOXkt7uuac": 8912063,
- "vbAbCp9elFU": 9739694,
- "vbGwcvXgDlg": 9721205,
- "vbslqfcBpnU": 23156988,
- "vce3BZFo27Y": 11934658,
- "vcn2ruTOwFo": 7625904,
- "vcwvzUVLPw0": 10777150,
- "vdpyWeiHXmU": 3901729,
- "ve5hfX3ywk0": 9924879,
- "vfMx9-rJXuo": 9016231,
- "vflZuk-_Hz4": 26230336,
- "vh166DKxYiM": 16572037,
- "vhMl755vR5Q": 8083668,
- "vhNxNZLjuOg": 16193631,
- "vhY3zQ6h49o": 16071438,
- "vhfjEpQWWeE": 12204660,
- "viaPc8zDcRI": 31544540,
- "vinEPfrqfiU": 4546866,
- "vk2GvyNmYD0": 87591811,
- "vkDCkD88-B0": 33743280,
- "vkhYFml0w6c": 6767833,
- "vl1uMOYFyf4": 18476348,
- "vl9o9XEfXtw": 5999668,
- "vlUVwfRarNQ": 4917767,
- "vluaivJqo9w": 66784930,
- "vmS3cTaxKdA": 2759851,
- "vmgKC2IJjOI": 18154558,
- "vnNlvnnBX0I": 13582408,
- "vnrdgyBi5wA": 28784778,
- "vny1qUaToHw": 39067301,
- "vr0sTKbV7lI": 12496030,
- "vr9k-TO1_Zc": 4331941,
- "vrGNXAGmfCM": 4151022,
- "vrmKqH8d1RM": 11571713,
- "vsgrWDLEzcQ": 5017106,
- "vsjl4aE2VkA": 100372706,
- "vst006REeTQ": 12256246,
- "vuGpUFjLaYE": 17255332,
- "vv6WBeqw2Nc": 20593732,
- "vwn0KGe8z3k": 9023074,
- "vx9aRRFQqBU": 46650275,
- "vxQvL_WhBGU": 7419285,
- "vzCVnLwaRKc": 11051890,
- "vzID7ds600c": 6546627,
- "w0nqd_HXHPQ": 7695312,
- "w1_EEi8-EaI": 11888378,
- "w1dqzlTTm0E": 101313487,
- "w217s1c8EOg": 33281380,
- "w23DzA68KPE": 1119104,
- "w2BN2AJ4fOI": 2389928,
- "w2M5CzTFYfI": 5887521,
- "w2QVg9mezcY": 6382995,
- "w3IKEa_GOYs": 23429570,
- "w3NwqsQuWZE": 19263427,
- "w3zCZEouYx4": 16239115,
- "w49ddHSDGUA": 7884488,
- "w56Vuf9tHfA": 18347022,
- "w616LEmrHVE": 1992001,
- "w6AWQb3r9o8": 15057200,
- "w6DDMwsyQaA": 20226256,
- "w6O2Rxub6VE": 7416694,
- "w6Tgu14VSLY": 129726745,
- "w702yvnip_w": 4003314,
- "w70af5Ou70M": 5515885,
- "w7NhLkQynS8": 2000230,
- "w89mmoD0O4c": 44474495,
- "w8QRG-Xc6oU": 32487396,
- "w9TmwjUZA6Q": 22917045,
- "w9jEq6dmqPg": 4093215,
- "wB3QCk0MGuw": 3263567,
- "wBCowBiXV7A": 3557405,
- "wD15pD5pCt4": 8936158,
- "wDdIwv7H3Sg": 40621024,
- "wDghWK_Rr_E": 17591960,
- "wDuCOxDxMzY": 3434476,
- "wE7_9Xce6LM": 102203838,
- "wHPGFPIcILM": 9796669,
- "wHuY97vss18": 16957431,
- "wIPriEEti6o": 9499829,
- "wJ37GJyViU8": 5246452,
- "wK-SQD3fhrI": 155270019,
- "wK4QAvtQKiM": 78448795,
- "wKPyzrEVqaQ": 5413380,
- "wLOEXEi7Uos": 32960406,
- "wLpOw8M7ucE": 56157889,
- "wNB9Vm6MoDQ": 148180863,
- "wNYFJsC8TZE": 6147661,
- "wOw7LWCW_Zk": 9440465,
- "wPA2FrET_Ac": 8929772,
- "wPLKm-ho1Bw": 1681049,
- "wPZIa3SjPF0": 2351234,
- "wQ1QGZ6gJ8w": 12412025,
- "wQ34EIfd-5A": 9678350,
- "wQHcz7U01M4": 49991316,
- "wQq2xOs2BYU": 6623716,
- "wRBMmiNHQaE": 3524292,
- "wRBPzExOH2A": 23154426,
- "wRKVNiABc0w": 36672349,
- "wRf6XiEZ_Y8": 43136809,
- "wRxzDOloS3o": 10915337,
- "wSiamij_i_k": 7220190,
- "wSqkieBUuo8": 3916010,
- "wT4tXGcoyWw": 29458821,
- "wToSIQJ2o_8": 7925826,
- "wTy2EZZWDUo": 1758379,
- "wU9_daCwr_w": 9504521,
- "wUNWjd4bMmw": 7947167,
- "wUb7tWgv49U": 6882121,
- "wV1pllyOaj8": 41824960,
- "wV59XWLmv0c": 5287339,
- "wVGzxh7LRzw": 11759069,
- "wVMe8ZmCZo0": 6210171,
- "wWsdcfGta4k": 16314346,
- "wXhkMvUXskE": 1674433,
- "wYAhlTHIBT4": 6833689,
- "wYGKRP0gD3I": 2481295,
- "wYhoqJDAvug": 11380288,
- "wYrxKGt_bLg": 9989997,
- "wYuAwm-5-Bk": 5720886,
- "wZJ_iAxvHGU": 6378819,
- "wZxZZ3RgWhI": 82996643,
- "w_GZqhAR0I4": 14904765,
- "waqE7cI1LxE": 51207080,
- "wbAxarp_Ug4": 2975791,
- "wbO4sKeyXYI": 9202178,
- "wbWL2wfvsM8": 12896813,
- "wbfDqHk-ryM": 13915853,
- "wbksgG0dQoE": 16879203,
- "wblW_M_HVQ8": 9259887,
- "wd4cRAoBOiE": 3617707,
- "wdAgEzdkFZI": 3378684,
- "wdINk29ZSMA": 7607867,
- "we6uSVf4qss": 139469210,
- "we829K4NOq8": 21040702,
- "wer4F-2qd-Y": 58235194,
- "wf3-tRpmGmY": 7092072,
- "wf8L9AZa2H4": 23384841,
- "wfY2vx3P0cE": 50426214,
- "wfnefFAmYjg": 9121707,
- "wgkRH5Uoavk": 8762849,
- "wgnJevkTEdw": 580519,
- "wiVWafc3JBM": 13360264,
- "wiWRUuRDXvc": 36560158,
- "wjCRcXQ3EHg": 49168883,
- "wjZb3zPuoeA": 5566198,
- "wkP1TF16z1M": 115626819,
- "wl2iQAuQl7Y": 2655721,
- "wlB0x9W-qBU": 8155234,
- "wluZFFkJ2io": 11602137,
- "wmQdFLdxLYc": 16869744,
- "wmp-aV0bPuE": 32777870,
- "wnbK76m691I": 45344889,
- "wo7DSaPP8hQ": 8903050,
- "woUQ9LLaees": 1304181,
- "wqnpSzEzq1w": 4736643,
- "wsL4Uh0BrQw": 25640456,
- "wtLTb_VaI-k": 8314805,
- "wuhNZejHeBg": 27424411,
- "wuls53jZYpo": 27951158,
- "wuxjTxxQUTs": 285450489,
- "wvVdgGTrh-o": 10622879,
- "wvtPCKwGZCU": 65689664,
- "wvwLy9ifmX0": 4428462,
- "wwO6DjL_wFw": 9785390,
- "ww_yT9ckPWw": 9135585,
- "wwjtuZ5vTvc": 11968746,
- "wx2gI8iwMCA": 4128671,
- "wxtltXz4zs0": 20634415,
- "wyT4IvTGSwk": 57118198,
- "wyTjyQMVvc4": 13628096,
- "wyWy4PouQxQ": 15886471,
- "wyxqq9Tc7GQ": 13334701,
- "wzZfyhaUvfY": 5673422,
- "wzw9ll80Zbc": 2896973,
- "wzzvz1hC5jA": 36691396,
- "x-6yMjpsqJU": 9021417,
- "x-Dqe5U1TXA": 3147867,
- "x-GV2v0dRNE": 15991654,
- "x-N76NrMDNE": 3942724,
- "x-bWkfve9k4": 43135440,
- "x0mPTh8eNGE": 100704837,
- "x0pFo1RxTzM": 10415165,
- "x1z0hOyjapU": 18668699,
- "x2V_Lz6AWEk": 5349304,
- "x34OTtDE5q8": 8244367,
- "x3CbfUr449Y": 28563589,
- "x3EMTQQjoA0": 12694137,
- "x3GFqNYaVRE": 122537928,
- "x3nTl9-xf58": 6631882,
- "x48CYVaD0xE": 4562062,
- "x4CptY9wJBs": 3193298,
- "x5EJG_rAtkY": 6679408,
- "x6FFjiHPlSI": 4096499,
- "x6rAFt5FW_Q": 101183488,
- "x6xtezhuCZ4": 3479197,
- "x726HASktrQ": 38965960,
- "x7L1s_GWn3o": 26259772,
- "x7wZCtFWblE": 5776660,
- "x8aBKMYqGPY": 24720565,
- "x8pEjhCc5ug": 7329085,
- "x9g82IA-IEU": 41830555,
- "x9wyOYnot7E": 12202247,
- "xAL0tbYU8QU": 33596137,
- "xC-fQ0KEzsM": 2289124,
- "xC55TgPmfZ0": 40995540,
- "xCIHAjsZCE0": 10352355,
- "xDGiTMetnQM": 9426586,
- "xDh4grm_ZSY": 8154532,
- "xE2HVxOPuMM": 3361659,
- "xE43JrjCpjE": 4134339,
- "xEDnwEOOf7Y": 2865985,
- "xFBK9534NI8": 36402229,
- "xFHh89QTRSE": 238428644,
- "xFNeN9rONKY": 9267229,
- "xF_Z4QK0tsA": 8716914,
- "xF_hJaXUNfE": 9952531,
- "xGBA1_VVvGI": 203336102,
- "xGE3sEz6U9Y": 17680904,
- "xGTTT6nG3Ns": 43224294,
- "xGiILI906C4": 10839664,
- "xGkE0oHyNhk": 6928504,
- "xGmef7lFc5w": 3712527,
- "xH5Y3Kmx82w": 31365787,
- "xHUsdE880so": 37113473,
- "xHWKYFhhtJQ": 2532828,
- "xHgPtFUbAeU": 7433398,
- "xHuLZHasldg": 14178509,
- "xIg420bVAcc": 5089994,
- "xJ-bPlF6PNc": 66087338,
- "xJf6pHqLzs0": 17739496,
- "xKH1Evwu150": 4997460,
- "xKJ3txXIuQk": 38445541,
- "xKNX8BUWR0g": 9385427,
- "xKhU3iMKRiw": 3767326,
- "xL98lBuAn1A": 10151903,
- "xL9ejqb53ms": 19270186,
- "xLYVo_k0_us": 2291491,
- "xM8szz4VB28": 49174204,
- "xMj3jzFDZ38": 33866933,
- "xMsG9hvqzbY": 9625593,
- "xMz9WFvox9g": 5133884,
- "xN3UV5FsBkU": 10175033,
- "xNOZ5yjIw-c": 41013660,
- "xNb7djjLNuU": 40386871,
- "xNf--q0YMq8": 11263293,
- "xO_1bYgoQvA": 14071815,
- "xOa-l_tXgWA": 11690722,
- "xOlHaQSBwOk": 6037101,
- "xOxvyeSl0uA": 6343545,
- "xPUm5SUVzTE": 9776909,
- "xPb6HLM3xEQ": 7026793,
- "xQ9D4Jz95-A": 24930341,
- "xR4AnXDBnsw": 3725049,
- "xR9r38mZjK4": 3128730,
- "xRjfRVXXFxU": 10511594,
- "xRw0CLvQkjo": 9576571,
- "xRyXz_UZ14Q": 9109687,
- "xRzZuhWSlb8": 2970812,
- "xSYZoUYd-E4": 121820041,
- "xSc4oLA9e8o": 3834451,
- "xSeYS3V5di8": 4366270,
- "xSixUm1cXSw": 9477789,
- "xTcwnhyPN5E": 9521454,
- "xTnNv7YplSo": 29671563,
- "xUDlKV8lJbM": 1472764,
- "xUFwzPmqt0Y": 9004744,
- "xUJn84k_Br8": 179735220,
- "xUSpHmvW14c": 14284349,
- "xUjRwepN7dk": 11215230,
- "xV5gCoDUDjY": 60951710,
- "xVWCfMe97ws": 4302753,
- "xW1UeIxEzoM": 10295024,
- "xWTzH7RV80g": 2634809,
- "xWvhFIh8AaI": 281284039,
- "xXAjkLUv7dY": 70856286,
- "xXIG8ouHcsc": 1596428,
- "xYEF_GXilu8": 15073056,
- "xYOK-yzUWSI": 68262178,
- "xYfTGui7vFE": 27770236,
- "xYoQQCO15GE": 32976630,
- "xZBbfLLfVV4": 5853856,
- "x_aax6LSRtE": 7823842,
- "xaz5ftvZCyI": 12325989,
- "xbyfeEW56Nc": 12068910,
- "xc-TSAQkqJ0": 25945923,
- "xcLKlPTG97k": 9097438,
- "xdIVZrr_8tI": 143741161,
- "xdarp2VBwNk": 10733932,
- "xdiBjypYFRQ": 8146488,
- "xeLeYS7GRvY": 2959541,
- "xeoVPSBP9WI": 1070120,
- "xf1okjCwdOg": 12026197,
- "xfFqSnulTR8": 37906618,
- "xg2OHgS0ijk": 47235967,
- "xgDuzj51tAc": 11696187,
- "xgTpGASqrKY": 95985852,
- "xgsbxmiPOrg": 32156016,
- "xheOq0XZ-so": 7807503,
- "xiIQQNufFuU": 1755556,
- "xjkSE9cPqzo": 10637514,
- "xjkbR7Gjgjs": 2893612,
- "xks4cETlN58": 3186769,
- "xl6NSugEqh4": 41378385,
- "xlJYYM5TWoA": 6737019,
- "xljS9fFv3EU": 1872988,
- "xlmruDxY48Y": 11009968,
- "xmjy-0TxgI8": 6932607,
- "xo4VpX2IIMk": 4501014,
- "xoAUMmZ0pzc": 3523126,
- "xoUppFlif04": 7355687,
- "xoXYirs2Mzw": 2315493,
- "xoxUWGl8WFs": 13303276,
- "xp6Zj24h8uA": 15629620,
- "xp6ibuI8UuQ": 11770055,
- "xpxe_ZttU-w": 1945326,
- "xpzt0wqMT6Y": 2859900,
- "xqpYeiefZl8": 3997047,
- "xrAalIDOBoY": 1360143,
- "xsSLvlonxs4": 10427641,
- "xsxReqs1-4Q": 27243858,
- "xt2M4HTw29A": 108943992,
- "xuQcB-oo-4U": 337357331,
- "xv-UAPbcbNU": 5496294,
- "xvS0CPhJpec": 169785024,
- "xvvI_QRYxBY": 6035074,
- "xvyQP-oezXc": 8898906,
- "xw6utjoyMi4": 16918175,
- "xwOTlMaerEQ": 3895847,
- "xx9xNJlPOJo": 6495252,
- "xxAFh-qHPPA": 4469997,
- "xxF_mdoZom0": 8074495,
- "xy3DfucAxdQ": 3176237,
- "xyTxrbsfLpg": 52922576,
- "xyhaEvNdwrQ": 38890847,
- "xz5DhwMsS1A": 19884328,
- "y-1Gh4ewklY": 92363600,
- "y-IAOPxkNWo": 187957568,
- "y-O_B-wWivQ": 1209441,
- "y0sk8LG4mWQ": 8091746,
- "y19jYxzY8Y8": 7390878,
- "y1PCYctq3yo": 28771838,
- "y1_N1GAsS5I": 24318746,
- "y2-uaPiyoxc": 1378133,
- "y2G03Lumhe0": 9046404,
- "y2RHWA7t0WM": 6185870,
- "y4C81qAa3pY": 1618024,
- "y55tzg_jW9I": 15338416,
- "y5aFEfFwsLQ": 21770865,
- "y5lhKvKvWPg": 51190543,
- "y5rv8mJgXGE": 8300897,
- "y7QLay8wrW8": 3442008,
- "y7YPTD7QwR4": 32478565,
- "y9MGpOGQVqQ": 1954278,
- "yA-NYmO8dDk": 14440007,
- "yAH3722GrP8": 5231734,
- "yAQSucmHrAk": 7780673,
- "yBCB9CvVdpg": 91787468,
- "yBrp8uvNAhI": 17393223,
- "yC3vsJJIcE0": 55211965,
- "yChPRfm4yvg": 13905640,
- "yDB-191sa2M": 3502660,
- "yDCeMg0krRM": 12632322,
- "yDwIfYjKEeo": 13468758,
- "yE3eQ6q39f4": 23710148,
- "yEAxG_D1HDw": 6088723,
- "yF4cvbAYjwI": 22041219,
- "yGbh89CgM-c": 20347162,
- "yGbwnYQjRjA": 14947753,
- "yHOrayogv1E": 12053254,
- "yHo0CcDVHsk": 5546002,
- "yIQUhXa-n-M": 3381859,
- "yIWKrQTznXc": 17220430,
- "yJ1dsNauhGE": 28455311,
- "yJzLYa-_Y1k": 4705037,
- "yKfpBGicqNQ": 5152353,
- "yKgp0BYKXlo": 15790779,
- "yKrp0sO3PJg": 720551629,
- "yL8ejNmJII4": 4014385,
- "yNz3ybrEe3I": 36008139,
- "yOAlbFVKGfk": 14373690,
- "yOf3kDD3WIA": 26311580,
- "yOgGhPIHnlA": 8809607,
- "yP5PWgbGImo": 93531353,
- "yQm_ZCIFwyc": 17386770,
- "yQsCMnz9wO8": 4597219,
- "yQtUyBrRBx4": 11165815,
- "yRmpV35y5HY": 4443562,
- "ySDcYZEcxcQ": 332597782,
- "yT-BpKlHMps": 8376941,
- "yTGEMoaWDCQ": 33156620,
- "yTMZsxSBv_0": 9077311,
- "yTOS61GFq0g": 13984098,
- "yUUPP70Fhpo": 15303485,
- "yUYDhmQsiXY": 3373932,
- "yUaI0JriZtY": 2201015,
- "yUpDRpkUhf4": 8647495,
- "yV4Xa8Xtmrc": 5533747,
- "yWkga94iBzU": 20259557,
- "yX3JpmEgNHo": 5955195,
- "yXg5CYuCcU4": 1733097,
- "yYGf7xn7TyM": 21087319,
- "yYbzJs6vgv8": 9071983,
- "yZqVJtDO7gc": 3869431,
- "yZtpr_curdc": 8479823,
- "yZw8z5BIwuQ": 4817833,
- "y_9X9LpqDBs": 61407589,
- "y_DweTAEYWk": 8038295,
- "y_sR3OyZUGo": 10549561,
- "yahEP620480": 2294191,
- "yar47jvr7M8": 43254167,
- "yb7lVnY_VCY": 4896737,
- "ybOKAzIVp70": 260760699,
- "yby2zx6q_yQ": 19066595,
- "ycBxbgjQns4": 5016877,
- "ye28W_OygOw": 4281287,
- "ye3rTjLCvAU": 16508679,
- "yeX0uDpPBj4": 14069656,
- "yenSUBmGrdU": 73900146,
- "yf6YvGb83H4": 264363082,
- "yfR36PMWegg": 31979819,
- "yg0XJWHPqOA": 8331727,
- "yg44T2HcA2o": 8773279,
- "ygXkdSKXQoA": 6217971,
- "ygzNKKLNJw0": 66978995,
- "yiH6GoscimY": 2921113,
- "yj4oS-27Q3k": 7220509,
- "yjBJ95ZXPcI": 16895179,
- "yk0P7IpSiIg": 19173099,
- "yl02C7dii7s": 4998647,
- "ymWr2tIwIGo": 257916381,
- "ynBuPEmcjp4": 13295164,
- "ynIq9IxbVso": 3792617,
- "yogD_-Op4Wc": 84362927,
- "ypH-hDKpCY0": 8905337,
- "ypxHVqE26gI": 16891202,
- "yqCGsOfKdRM": 49381070,
- "yqJB8XMXzE4": 13495642,
- "yqc9zX04DXs": 71797481,
- "yqoljfiOYKY": 5964179,
- "yqwnRekNLg4": 54075323,
- "yrlLKwmb5dY": 3900983,
- "yro2jLBfyDQ": 4913260,
- "yrxAKGGEWZY": 245885953,
- "ysVcAYo7UPI": 3748920,
- "ysdY1iX_XCs": 20933016,
- "yvddTWa9ptU": 2822410,
- "yvnr0wnmoGY": 264234229,
- "yvzyC4VBpUU": 1997717,
- "ywOr4OYqXOs": 12209906,
- "ywfxY9UDRo4": 11899827,
- "yyM0yIOJ2yE": 7841756,
- "z-DvmxflJgA": 30823551,
- "z-N9IzR9fAY": 6652773,
- "z-Qi4w6Xkuc": 7538302,
- "z-SU7P-gIoQ": 5498434,
- "z-yC6Owcg7g": 24329105,
- "z0-1gBy1ykE": 2126811,
- "z0mqaTOu1e4": 73804617,
- "z0wg9ZPyL38": 4491759,
- "z1hz8-Kri1E": 6687826,
- "z1lwai-lIzY": 7525285,
- "z1yJPpGC3-o": 5219069,
- "z45UEiPaE8c": 2828382,
- "z4vB44Rdq48": 65013515,
- "z5OqEegsQMo": 14321609,
- "z6lL83wl31E": 31555359,
- "z83guai4S68": 125089524,
- "z8BM6cHifPA": 6867455,
- "z8M4EciPpYI": 12221114,
- "z8h7QgevqjM": 4175978,
- "z8vj8tUCkxY": 4978647,
- "z9LxdqYntlU": 18326463,
- "z9s_uJlG3b8": 57764784,
- "zA0fvwtvgvA": 6720665,
- "zA2KSx5OYog": 65061311,
- "zAQz5J3Tpgs": 13734424,
- "zAkMhEqWFF0": 7045409,
- "zAx61CO5mDw": 7515788,
- "zC_dTaEY2AY": 38805579,
- "zEd67cLFnuQ": 9229465,
- "zGO-MlsdmgU": 5157403,
- "zGpbSGj_vfE": 6952439,
- "zIcBK9t06YU": 8665626,
- "zIcxrhyJs6M": 4456542,
- "zIfQFH79Kkg": 11404382,
- "zJ5w4YhOyN8": 10728096,
- "zKotuhQWIRg": 1377752,
- "zM4cHiV3kF4": 7880200,
- "zMQhuo3QYIg": 28819969,
- "zM_aEudpMkc": 12202081,
- "zM_p7tfWvLU": 13134536,
- "zNAL1R-hZr0": 87667807,
- "zNlL0M4jWaw": 45281597,
- "zNtbi4OJs9I": 1886513,
- "zNxEVaRbdus": 6812377,
- "zOZiuAOuOkA": 7289303,
- "zOrkcZ1dlHk": 3502464,
- "zPcObUqM-Zs": 11815924,
- "zPjbiP66-6M": 74540524,
- "zR4OaoiNkA0": 11528523,
- "zRjLZROI7wc": 4269797,
- "zRuLkyLx3No": 38569749,
- "zSIJcGPIzro": 13534287,
- "zSVrr8K_CiI": 7394633,
- "zTK6XUF0HAs": 5620025,
- "zTLxxezKUT8": 2396696,
- "zTb4TklMVcY": 16275667,
- "zU9qSQi1E68": 132122650,
- "zVLjWIftX_o": 3319560,
- "zVsGtU8lIWs": 4914594,
- "zWcfVC-oCNw": 6044696,
- "zXyQI4lD4wI": 6970718,
- "zZX9jJqSlQs": 24311644,
- "z_5AAk1jABI": 273701286,
- "z_QeYCg4yJ8": 14951603,
- "z_guKLKwjgY": 31553415,
- "za0QJRZ-yQ4": 5551054,
- "zaGUlwslGGg": 552440,
- "zaJVEO44_08": 20283678,
- "zaNUFmhD5PM": 25089868,
- "zbQFQ_nzbhI": 35640738,
- "zcnnZz2pCSg": 7258592,
- "zd3RyRk6wYI": 5562562,
- "zdvKhaQxvag": 35702119,
- "zfJqkiNXShI": 317723554,
- "zfZu--psur8": 13511287,
- "zg3-miF4qeg": 4723785,
- "zh8XASZxo1Q": 11570947,
- "zhL5DCizj5c": 219074671,
- "zid7J4EhZN8": 8693509,
- "zjIVJh4JLNo": 14835039,
- "zjhepBLtqug": 17408663,
- "zk3vlhz1b6k": 48623348,
- "zlI8mx8Hc8o": 12035736,
- "zlRKO21qEpQ": 1937056,
- "zltgXTlUVLw": 3826331,
- "zm3TXDZrifU": 4687759,
- "zmBV87XA52Q": 34796719,
- "zmOeHUBScY0": 45687001,
- "zmQrI4786cc": 2485654,
- "znE4Nq9NJCQ": 7477980,
- "znKX9WcowfY": 17260523,
- "znT4W6n3WkI": 13062089,
- "znVEFfIdo1o": 122968143,
- "znlvsmuROwI": 6793047,
- "znmPfDfsir8": 2767590,
- "zntNi3-ybfQ": 20957313,
- "zopoN2i7ALQ": 22119393,
- "zpnjkbJNp90": 8693004,
- "zpzM3Xun6-Q": 11770008,
- "zqGvUbvVQXg": 7096962,
- "zqb4Zvb5PNA": 80774481,
- "zqduFg0s5Q4": 21944677,
- "zqwVKhQV_2w": 3895136,
- "zrqzG6xKa1A": 7580336,
- "zs5LM7dxyTo": 16031569,
- "zsI4g5XSlbw": 573947,
- "zscrs94_pFc": 12176232,
- "zsdek-uH0NU": 288978464,
- "zv8LHyH7_rI": 8700280,
- "zvetEuVJ0bE": 3948186,
- "zwDJ1wVr7Is": 8015907,
- "zxy4KAiSPIc": 1604719,
- "zz4KbvF_X-0": 15060827
-}
\ No newline at end of file
diff --git a/data/narratives.yml b/data/narratives.yml
index 77cba4adaa..00bf2ea76b 100644
--- a/data/narratives.yml
+++ b/data/narratives.yml
@@ -1,23 +1,58 @@
management/zone/.*:
- - 'a#manage.admin-only':
+ - li.manage-tab.active:
- step: 1
- - text: 'Welcome! This is the landing page for admins. If at any point you would like to navigate back to this page, click on this tab!'
- - 'li.facility':
+ - text: Welcome! This is the landing page for admins. If at any point you would like to navigate back to this page, click on this tab!
+ - li.facility:
- step: 2
- - text: 'Clicking on this tab will show you a quick overview of all facilities and devices'
+ - text: Clicking on this tab will show you a quick overview of all facilities and devices you have set up.
- position: right
- - 'a.create-facility':
+ - div.col-xs-12:
- step: 3
- - text: 'To add new facilities, click on this link.'
- - 'div.row:nth-child(3)':
+ - text: "An overview of all facilities will be shown here"
+ - a.create-facility:
- step: 4
- - text: 'Information on your device status will be shown here'
- - '#not-registered':
+ - text: To add new facilities, click on this link.
+ - a.facility-name:
- step: 5
- - text: 'By registering your device with our central hub, you can sync your data. This allows you to manage user accounts and view usage data remotely!'
- - '#not-registered':
+ - text: To view more detailed information such as learner groups, learners, and coaches belonging to a facility, click on the facility name.
+ - '#devices-table tbody tr td:nth-child(1)':
- step: 6
- - text: 'If you decide to register your device to our central hub, click this button!'
- - 'unattached':
+ - text: Information on your device status will be shown here
+ - unattached:
- step: 7
- - text: 'Any more questions? Be sure to consult the FAQ and Documentation!'
\ No newline at end of file
+ - text: Any more questions? Be sure to consult the FAQ and Documentation!
+update/videos:
+ - li.video.active:
+ - step: 1
+ - text: Selecting this "Videos" tab will lead you to the place where you can download new videos for all topics!
+ - '#content_tree':
+ - step: 2
+ - text: Downloadable content will be organized in this topic tree.
+ - span.dynatree-node.dynatree-folder.dynatree-has-children.unstarted.dynatree-exp-c.dynatree-ico-cf:
+ - step: 3
+ - text: Simply toggle the "+" button to view see more subtopics under a topic....
+update/languages:
+ - li.languages.active:
+ - step: 1
+ - text: Selecting the "Language" tab will take you to the place where you can download or update language packs!
+ - '#language-packs-selection':
+ - step: 2
+ - text: Click on this drop down menu to view the available language packs...
+ - '#option-bg':
+ - step: 3
+ - text: ...select the language of your choice...
+ - before-showing:
+ - click: '#language-packs-selection'
+ - '#langpack-details':
+ - step: 4
+ - text: ...and details such as the number of subtitles, translation completion, and total download size will be displayed for the chosen language pack!
+ - before-showing:
+ - click: '#option-bg'
+ - '#get-language-button':
+ - step: 5
+ - text: Just click this button to start your download!
+ - '#installed-languages-div':
+ - step: 6
+ - text: Any language packs already installed on your device will be shown in this section
+
+
diff --git a/data/version.yml b/data/version.yml
index 958b6cc03d..30c7e178bc 100644
--- a/data/version.yml
+++ b/data/version.yml
@@ -1,3 +1,17 @@
+0.16.0:
+ release_date:
+ git_commit: ""
+ new_features:
+ all: []
+ students: []
+ coaches: []
+ admins: []
+ bugs_fixed:
+ all: []
+ students: []
+ coaches: []
+ admins: []
+
0.15.1:
release_date: "2015/12/01"
git_commit: "746d0d"
diff --git a/docs/developer_docs/accessibility.rst b/docs/developer_docs/accessibility.rst
new file mode 100644
index 0000000000..58fb5935bf
--- /dev/null
+++ b/docs/developer_docs/accessibility.rst
@@ -0,0 +1,62 @@
+Contribute to make KA Lite accessible to all
+============================================
+
+
+Why
+--------------------------------------------
+
+Because inclusive design benefits all users!
+
+* Ensuring that KA Lite is easily navigable with the keyboard will help blind users AND those who cannot use the mouse (or just prefer using the keyboard most of the time).
+* Using the appropriate color contrast or making available a high contrast version of KA Lite content will benefit the users with low vision AND all those who need to use it in highly illuminated settings.
+* Offering captions and transcripts for KA Lite video content will benefit auditory challenged audience AND improve its comprehension for everybody.
+* Maintaining consistent structure, navigation and language will reduce cognitive load for all the audiences AND make it easier for KA Lite content to be localized.
+
+How
+--------------------------------------------
+
+For general introduction check the **Accessibility** resources, tools and tips on `KA lite GitHub Wiki pages {{ status.facility_name }}{{#if status.group_name }}: {{ status.group_name }}{{/if}}{{#if data.learner_events }}{{/if}}
+ {{ status.facility_name }}{{#if status.group_name }}: {{ status.group_name }}{{/if}}
+ {{#if start_date}}{{ start_date }}{{#if end_date }} → {{ end_date }}{{/if}}{{else}}{{_ "This week" }}{{/if}}
+ {{_ "Current status of user exercises" }}
+
+
+
+ {{_ "Student Activity Feed" }}
@@ -54,7 +84,7 @@